xref: /illumos-gate/usr/src/uts/common/io/ib/clients/ibd/ibd.c (revision 9b664393d4fdda96221e6ea9ea95790d3c15be70)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright 2022 Garrett D'Amore
25  */
26 
27 /*
28  * An implementation of the IPoIB standard based on PSARC 2001/289.
29  */
30 
31 #include <sys/types.h>
32 #include <sys/conf.h>
33 #include <sys/ddi.h>
34 #include <sys/sunddi.h>
35 #include <sys/modctl.h>
36 #include <sys/stropts.h>
37 #include <sys/stream.h>
38 #include <sys/strsun.h>
39 #include <sys/strsubr.h>
40 #include <sys/dlpi.h>
41 #include <sys/mac_provider.h>
42 
43 #include <sys/pattr.h>		/* for HCK_FULLCKSUM */
44 #include <sys/sysmacros.h>	/* for offsetof */
45 #include <sys/disp.h>		/* for async thread pri */
46 #include <sys/atomic.h>		/* for atomic_add*() */
47 #include <sys/ethernet.h>	/* for ETHERTYPE_IPV6 */
48 #include <netinet/in.h>		/* for netinet/ip.h below */
49 #include <netinet/ip.h>		/* for struct ip */
50 #include <netinet/udp.h>	/* for struct udphdr */
51 #include <inet/common.h>	/* for inet/ip.h below */
52 #include <inet/ip.h>		/* for ipha_t */
53 #include <inet/ip6.h>		/* for ip6_t */
54 #include <inet/tcp.h>		/* for tcph_t */
55 #include <netinet/icmp6.h>	/* for icmp6_t */
56 #include <sys/callb.h>
57 #include <sys/modhash.h>
58 
59 #include <sys/ib/clients/ibd/ibd.h>
60 #include <sys/ib/mgt/sm_attr.h>	/* for SM_INIT_TYPE_* */
61 #include <sys/note.h>
62 
63 #include <sys/ib/mgt/ibmf/ibmf.h>	/* for ibd_get_portspeed */
64 
65 #include <sys/priv_names.h>
66 #include <sys/dls.h>
67 #include <sys/dld_ioc.h>
68 #include <sys/policy.h>
69 #include <sys/ibpart.h>
70 #include <sys/file.h>
71 
72 /*
73  * The write-up below includes details on the following:
74  * 1. The dladm administrative model.
75  * 2. Late HCA initialization feature.
76  * 3. Brussels support and its implications to the current architecture.
77  *
78  * 1. The dladm administrative model.
79  * ------------------------------------------
80  * With the dladm model, ibnex will create one ibd instance per port. These
81  * instances will be created independent of the port state.
82  *
83  * The ibd driver is two faceted: One side of it working as the port driver and
84  * the other as the partition object driver.
85  *
86  * The port instance is a child of the HCA, and will have an entry in the devfs.
87  * A DDI attach only happens for the port driver, and its attach is
88  * handled in ibd_port_attach(). Similary, a DDI detach for the port driver is
89  * handled in ibd_port_unattach().
90  *
91  * The partition object is only a registrant to the mac layer via mac_register()
92  * and does not have an entry in the device tree. There is no DDI softstate
93  * managed by the DDI framework for the partition objects. However, the state is
94  * managed inside the ibd driver, and every partition object hangs off the
95  * "ibd_objlist_head".
96  *
97  * The partition object first comes into existence when a user runs the
98  * 'create-part' subcommand of dladm. This is like invoking the attach entry
99  * point of the partition object. The partition object goes away with the
100  * 'delete-part' subcommand of dladm. This is like invoking the detach entry
101  * point of the partition object.
102  *
103  * The create-part and delete-part subcommands result in dld ioctls that end up
104  * calling ibd_create_parition() and ibd_delete_partition respectively.
105  * There ioctls are registered with the dld layer in _init() via a call to
106  * dld_ioc_register().
107  *
108  * The port instance by itself cannot be plumbed. It is only the partition
109  * objects that can be plumbed and they alone participate in I/O and not the
110  * port driver.
111  *
112  * There are some info ioctls supported in ibd which are used by dladm(8) to
113  * display useful information. The info entry point for ibd is
114  * ibd_get_partition_info().
115  *
116  * 2. Late HCA initialization feature.
117  * ------------------------------------
118  * As mentioned in section 1, the user creates the partition objects via
119  * dladm(8). It is possible that:
120  * a) The physical port itself is down and the SM cannot be reached.
121  * b) The PKEY specified by the used has not been created in the SM yet.
122  * c) An IPoIB broadcast group for the specified PKEY is not present.
123  *
124  * In all of the above cases, complete initialization of the partition object is
125  * not possible. However, the new model allows the creation of partition
126  * objects even in such cases but will defer the initialization for later.
127  * When such a partition object is plumbed, the link state will be displayed as
128  * "down".
129  * The driver, at this point, is listening to events that herald the
130  * availability of resources -
131  * i)   LINK_UP when the link becomes available
132  * ii)  PORT_CHANGE when the PKEY has been created
133  * iii) MCG_CREATED when the IPoIB broadcast group for the given pkey has been
134  * created
135  * via ibd_async_handler() for events i) and ii), and via
136  * ibd_snet_notices_handler() for iii.
137  * The driver handles these events (as and when they arrive) and completes the
138  * initialization of the partition object and transitions it to a usable state.
139  *
140  * 3. Brussels support and its implications to the current architecture.
141  * ---------------------------------------------------------------------
142  * The brussels support introduces two new interfaces to the ibd driver -
143  * ibd_m_getprop() and ibd_m_setprop().
144  * These interfaces allow setting and retrieval of certain properties.
145  * Some of them are public properties while most other are private properties
146  * meant to be used by developers. Tuning the latter kind can cause
147  * performance issues and should not be used without understanding the
148  * implications. All properties are specific to an instance of either the
149  * partition object or the port driver.
150  *
151  * The public properties are : mtu and linkmode.
152  * mtu is a read-only property.
153  * linkmode can take two values - UD and CM.
154  *
155  * Changing the linkmode requires some bookkeeping in the driver. The
156  * capabilities need to be re-reported to the mac layer. This is done by
157  * calling mac_capab_update().  The maxsdu is updated by calling
158  * mac_maxsdu_update2().
159  * The private properties retain their values across the change of linkmode.
160  * NOTE:
161  * - The port driver does not support any property apart from mtu.
162  * - All other properties are only meant for the partition object.
163  * - The properties cannot be set when an instance is plumbed. The
164  * instance has to be unplumbed to effect any setting.
165  */
166 
167 /*
168  * Driver wide tunables
169  *
170  * ibd_tx_softintr
171  * ibd_rx_softintr
172  *     The softintr mechanism allows ibd to avoid event queue overflows if
173  *     the receive/completion handlers are to be expensive. These are enabled
174  *     by default.
175  *
176  * ibd_log_sz
177  *     This specifies the size of the ibd log buffer in bytes. The buffer is
178  *     allocated and logging is enabled only when IBD_LOGGING is defined.
179  *
180  */
181 uint_t ibd_rx_softintr = 1;
182 uint_t ibd_tx_softintr = 1;
183 
184 #ifdef IBD_LOGGING
185 uint_t ibd_log_sz = 0x20000;
186 #endif
187 
188 #ifdef IBD_LOGGING
189 #define	IBD_LOG_SZ			ibd_log_sz
190 #endif
191 
192 /* Post IBD_RX_POST_CNT receive work requests at a time. */
193 #define	IBD_RX_POST_CNT			8
194 
195 /* Hash into 1 << IBD_LOG_RX_POST number of rx post queues */
196 #define	IBD_LOG_RX_POST			4
197 
198 /* Minimum number of receive work requests driver needs to always have */
199 #define	IBD_RWQE_MIN	((IBD_RX_POST_CNT << IBD_LOG_RX_POST) * 4)
200 
201 /*
202  * LSO parameters
203  */
204 #define	IBD_LSO_MAXLEN			65536
205 #define	IBD_LSO_BUFSZ			8192
206 
207 /*
208  * Async operation states
209  */
210 #define	IBD_OP_NOTSTARTED		0
211 #define	IBD_OP_ONGOING			1
212 #define	IBD_OP_COMPLETED		2
213 #define	IBD_OP_ERRORED			3
214 #define	IBD_OP_ROUTERED			4
215 
216 /*
217  * Start/stop in-progress flags; note that restart must always remain
218  * the OR of start and stop flag values.
219  */
220 #define	IBD_DRV_START_IN_PROGRESS	0x10000000
221 #define	IBD_DRV_STOP_IN_PROGRESS	0x20000000
222 #define	IBD_DRV_RESTART_IN_PROGRESS	0x30000000
223 #define	IBD_DRV_DELETE_IN_PROGRESS	IBD_DRV_RESTART_IN_PROGRESS
224 
225 /*
226  * Miscellaneous constants
227  */
228 #define	IB_MGID_IPV4_LOWGRP_MASK	0xFFFFFFFF
229 #define	IBD_DEF_MAX_SDU			2044
230 #define	IBD_DEF_MAX_MTU			(IBD_DEF_MAX_SDU + IPOIB_HDRSIZE)
231 #define	IBD_DEF_RC_MAX_SDU		65520
232 #define	IBD_DEF_RC_MAX_MTU		(IBD_DEF_RC_MAX_SDU + IPOIB_HDRSIZE)
233 #define	IBD_DEFAULT_QKEY		0xB1B
234 #ifdef IBD_LOGGING
235 #define	IBD_DMAX_LINE			100
236 #endif
237 
238 /*
239  * Enumerations for link states
240  */
241 typedef enum {
242 	IBD_LINK_DOWN,
243 	IBD_LINK_UP,
244 	IBD_LINK_UP_ABSENT
245 } ibd_link_op_t;
246 
247 /*
248  * Driver State Pointer
249  */
250 void *ibd_list;
251 
252 /*
253  * Driver Global Data
254  */
255 ibd_global_state_t ibd_gstate;
256 
257 /*
258  * Partition object list
259  */
260 ibd_state_t	*ibd_objlist_head = NULL;
261 kmutex_t	ibd_objlist_lock;
262 
263 int ibd_rc_conn_timeout = 60 * 10;	/* 10 minutes */
264 
265 /*
266  * Logging
267  */
268 #ifdef IBD_LOGGING
269 kmutex_t ibd_lbuf_lock;
270 uint8_t *ibd_lbuf;
271 uint32_t ibd_lbuf_ndx;
272 #endif
273 
274 /*
275  * Required system entry points
276  */
277 static int ibd_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
278 static int ibd_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
279 
280 /*
281  * Required driver entry points for GLDv3
282  */
283 static int ibd_m_stat(void *, uint_t, uint64_t *);
284 static int ibd_m_start(void *);
285 static void ibd_m_stop(void *);
286 static int ibd_m_promisc(void *, boolean_t);
287 static int ibd_m_multicst(void *, boolean_t, const uint8_t *);
288 static int ibd_m_unicst(void *, const uint8_t *);
289 static mblk_t *ibd_m_tx(void *, mblk_t *);
290 static boolean_t ibd_m_getcapab(void *, mac_capab_t, void *);
291 
292 static int ibd_m_setprop(void *, const char *, mac_prop_id_t, uint_t,
293     const void *);
294 static int ibd_m_getprop(void *, const char *, mac_prop_id_t, uint_t, void *);
295 static void ibd_m_propinfo(void *, const char *, mac_prop_id_t,
296     mac_prop_info_handle_t);
297 static int ibd_set_priv_prop(ibd_state_t *, const char *, uint_t,
298     const void *);
299 static int ibd_get_priv_prop(ibd_state_t *, const char *, uint_t, void *);
300 
301 /*
302  * Private driver entry points for GLDv3
303  */
304 
305 /*
306  * Initialization
307  */
308 static int ibd_state_init(ibd_state_t *, dev_info_t *);
309 static int ibd_init_txlist(ibd_state_t *);
310 static int ibd_init_rxlist(ibd_state_t *);
311 static int ibd_acache_init(ibd_state_t *);
312 #ifdef IBD_LOGGING
313 static void ibd_log_init(void);
314 #endif
315 
316 /*
317  * Termination/cleanup
318  */
319 static void ibd_state_fini(ibd_state_t *);
320 static void ibd_fini_txlist(ibd_state_t *);
321 static void ibd_fini_rxlist(ibd_state_t *);
322 static void ibd_tx_cleanup(ibd_state_t *, ibd_swqe_t *);
323 static void ibd_tx_cleanup_list(ibd_state_t *, ibd_swqe_t *, ibd_swqe_t *);
324 static void ibd_acache_fini(ibd_state_t *);
325 #ifdef IBD_LOGGING
326 static void ibd_log_fini(void);
327 #endif
328 
329 /*
330  * Allocation/acquire/map routines
331  */
332 static int ibd_alloc_tx_copybufs(ibd_state_t *);
333 static int ibd_alloc_rx_copybufs(ibd_state_t *);
334 static int ibd_alloc_tx_lsobufs(ibd_state_t *);
335 static ibd_swqe_t *ibd_acquire_swqe(ibd_state_t *);
336 static int ibd_acquire_lsobufs(ibd_state_t *, uint_t, ibt_wr_ds_t *,
337     uint32_t *);
338 
339 /*
340  * Free/release/unmap routines
341  */
342 static void ibd_free_rwqe(ibd_state_t *, ibd_rwqe_t *);
343 static void ibd_free_tx_copybufs(ibd_state_t *);
344 static void ibd_free_rx_copybufs(ibd_state_t *);
345 static void ibd_free_rx_rsrcs(ibd_state_t *);
346 static void ibd_free_tx_lsobufs(ibd_state_t *);
347 static void ibd_release_swqe(ibd_state_t *, ibd_swqe_t *, ibd_swqe_t *, int);
348 static void ibd_release_lsobufs(ibd_state_t *, ibt_wr_ds_t *, uint32_t);
349 static void ibd_free_lsohdr(ibd_swqe_t *, mblk_t *);
350 
351 /*
352  * Handlers/callback routines
353  */
354 static uint_t ibd_intr(caddr_t);
355 static uint_t ibd_tx_recycle(caddr_t);
356 static void ibd_rcq_handler(ibt_cq_hdl_t, void *);
357 static void ibd_scq_handler(ibt_cq_hdl_t, void *);
358 static void ibd_poll_rcq(ibd_state_t *, ibt_cq_hdl_t);
359 static void ibd_poll_scq(ibd_state_t *, ibt_cq_hdl_t);
360 static void ibd_drain_rcq(ibd_state_t *, ibt_cq_hdl_t);
361 static void ibd_drain_scq(ibd_state_t *, ibt_cq_hdl_t);
362 static void ibd_freemsg_cb(char *);
363 static void ibd_async_handler(void *, ibt_hca_hdl_t, ibt_async_code_t,
364     ibt_async_event_t *);
365 static void ibdpd_async_handler(void *, ibt_hca_hdl_t, ibt_async_code_t,
366     ibt_async_event_t *);
367 static void ibd_snet_notices_handler(void *, ib_gid_t,
368     ibt_subnet_event_code_t, ibt_subnet_event_t *);
369 
370 /*
371  * Send/receive routines
372  */
373 static boolean_t ibd_send(ibd_state_t *, mblk_t *);
374 static void ibd_post_send(ibd_state_t *, ibd_swqe_t *);
375 static void ibd_post_recv(ibd_state_t *, ibd_rwqe_t *);
376 static mblk_t *ibd_process_rx(ibd_state_t *, ibd_rwqe_t *, ibt_wc_t *);
377 
378 /*
379  * Threads
380  */
381 static void ibd_async_work(ibd_state_t *);
382 
383 /*
384  * Async tasks
385  */
386 static void ibd_async_acache(ibd_state_t *, ipoib_mac_t *);
387 static void ibd_async_multicast(ibd_state_t *, ib_gid_t, int);
388 static void ibd_async_setprom(ibd_state_t *);
389 static void ibd_async_unsetprom(ibd_state_t *);
390 static void ibd_async_reap_group(ibd_state_t *, ibd_mce_t *, ib_gid_t, uint8_t);
391 static void ibd_async_trap(ibd_state_t *, ibd_req_t *);
392 static void ibd_async_txsched(ibd_state_t *);
393 static void ibd_async_link(ibd_state_t *, ibd_req_t *);
394 
395 /*
396  * Async task helpers
397  */
398 static ibd_mce_t *ibd_async_mcache(ibd_state_t *, ipoib_mac_t *, boolean_t *);
399 static ibd_mce_t *ibd_join_group(ibd_state_t *, ib_gid_t, uint8_t);
400 static ibd_mce_t *ibd_mcache_find(ib_gid_t, struct list *);
401 static boolean_t ibd_get_allroutergroup(ibd_state_t *,
402     ipoib_mac_t *, ipoib_mac_t *);
403 static void ibd_leave_group(ibd_state_t *, ib_gid_t, uint8_t);
404 static void ibd_reacquire_group(ibd_state_t *, ibd_mce_t *);
405 static ibt_status_t ibd_iba_join(ibd_state_t *, ib_gid_t, ibd_mce_t *);
406 static ibt_status_t ibd_find_bgroup(ibd_state_t *);
407 static void ibd_n2h_gid(ipoib_mac_t *, ib_gid_t *);
408 static void ibd_h2n_mac(ipoib_mac_t *, ib_qpn_t, ib_sn_prefix_t, ib_guid_t);
409 static uint64_t ibd_get_portspeed(ibd_state_t *);
410 static boolean_t ibd_async_safe(ibd_state_t *);
411 static void ibd_async_done(ibd_state_t *);
412 static ibd_ace_t *ibd_acache_lookup(ibd_state_t *, ipoib_mac_t *, int *, int);
413 static ibd_ace_t *ibd_acache_get_unref(ibd_state_t *);
414 static void ibd_link_mod(ibd_state_t *, ibt_async_code_t);
415 static int ibd_locate_pkey(ib_pkey_t *, uint16_t, ib_pkey_t, uint16_t *);
416 
417 /*
418  * Helpers for attach/start routines
419  */
420 static int ibd_register_mac(ibd_state_t *, dev_info_t *);
421 static int ibd_record_capab(ibd_state_t *);
422 static int ibd_get_port_details(ibd_state_t *);
423 static int ibd_alloc_cqs(ibd_state_t *);
424 static int ibd_setup_ud_channel(ibd_state_t *);
425 static int ibd_start(ibd_state_t *);
426 static int ibd_undo_start(ibd_state_t *, link_state_t);
427 static void ibd_set_mac_progress(ibd_state_t *, uint_t);
428 static void ibd_clr_mac_progress(ibd_state_t *, uint_t);
429 static int ibd_part_attach(ibd_state_t *state, dev_info_t *dip);
430 static void ibd_part_unattach(ibd_state_t *state);
431 static int ibd_port_attach(dev_info_t *);
432 static int ibd_port_unattach(ibd_state_t *state, dev_info_t *dip);
433 static int ibd_get_port_state(ibd_state_t *, link_state_t *);
434 static int ibd_part_busy(ibd_state_t *);
435 
436 /*
437  * Miscellaneous helpers
438  */
439 static int ibd_sched_poll(ibd_state_t *, int, int);
440 static void ibd_resume_transmission(ibd_state_t *);
441 static int ibd_setup_lso(ibd_swqe_t *, mblk_t *, uint32_t, ibt_ud_dest_hdl_t);
442 static int ibd_prepare_sgl(ibd_state_t *, mblk_t *, ibd_swqe_t *, uint_t);
443 static void *list_get_head(list_t *);
444 static int ibd_hash_key_cmp(mod_hash_key_t, mod_hash_key_t);
445 static uint_t ibd_hash_by_id(void *, mod_hash_key_t);
446 
447 ibt_status_t ibd_get_part_attr(datalink_id_t, ibt_part_attr_t *);
448 ibt_status_t ibd_get_all_part_attr(ibt_part_attr_t **, int *);
449 
450 #ifdef IBD_LOGGING
451 static void ibd_log(const char *, ...);
452 #endif
453 
454 DDI_DEFINE_STREAM_OPS(ibd_dev_ops, nulldev, nulldev, ibd_attach, ibd_detach,
455     nodev, NULL, D_MP, NULL, ddi_quiesce_not_needed);
456 
457 /* Module Driver Info */
458 static struct modldrv ibd_modldrv = {
459 	&mod_driverops,			/* This one is a driver */
460 	"InfiniBand GLDv3 Driver",	/* short description */
461 	&ibd_dev_ops			/* driver specific ops */
462 };
463 
464 /* Module Linkage */
465 static struct modlinkage ibd_modlinkage = {
466 	MODREV_1, (void *)&ibd_modldrv, NULL
467 };
468 
469 /*
470  * Module (static) info passed to IBTL during ibt_attach
471  */
472 static struct ibt_clnt_modinfo_s ibd_clnt_modinfo = {
473 	IBTI_V_CURR,
474 	IBT_NETWORK,
475 	ibd_async_handler,
476 	NULL,
477 	"IBPART"
478 };
479 
480 static struct ibt_clnt_modinfo_s ibdpd_clnt_modinfo = {
481 	IBTI_V_CURR,
482 	IBT_NETWORK,
483 	ibdpd_async_handler,
484 	NULL,
485 	"IPIB"
486 };
487 
488 /*
489  * GLDv3 entry points
490  */
491 #define	IBD_M_CALLBACK_FLAGS	\
492 	(MC_GETCAPAB | MC_SETPROP | MC_GETPROP | MC_PROPINFO)
493 
494 static mac_callbacks_t ibd_m_callbacks = {
495 	IBD_M_CALLBACK_FLAGS,
496 	ibd_m_stat,
497 	ibd_m_start,
498 	ibd_m_stop,
499 	ibd_m_promisc,
500 	ibd_m_multicst,
501 	ibd_m_unicst,
502 	ibd_m_tx,
503 	NULL,
504 	NULL,
505 	ibd_m_getcapab,
506 	NULL,
507 	NULL,
508 	ibd_m_setprop,
509 	ibd_m_getprop,
510 	ibd_m_propinfo
511 };
512 
513 /* Private properties */
514 char *ibd_priv_props[] = {
515 	"_ibd_broadcast_group",
516 	"_ibd_coalesce_completions",
517 	"_ibd_create_broadcast_group",
518 	"_ibd_hash_size",
519 	"_ibd_lso_enable",
520 	"_ibd_num_ah",
521 	"_ibd_num_lso_bufs",
522 	"_ibd_rc_enable_srq",
523 	"_ibd_rc_num_rwqe",
524 	"_ibd_rc_num_srq",
525 	"_ibd_rc_num_swqe",
526 	"_ibd_rc_rx_comp_count",
527 	"_ibd_rc_rx_comp_usec",
528 	"_ibd_rc_rx_copy_thresh",
529 	"_ibd_rc_rx_rwqe_thresh",
530 	"_ibd_rc_tx_comp_count",
531 	"_ibd_rc_tx_comp_usec",
532 	"_ibd_rc_tx_copy_thresh",
533 	"_ibd_ud_num_rwqe",
534 	"_ibd_ud_num_swqe",
535 	"_ibd_ud_rx_comp_count",
536 	"_ibd_ud_rx_comp_usec",
537 	"_ibd_ud_tx_comp_count",
538 	"_ibd_ud_tx_comp_usec",
539 	"_ibd_ud_tx_copy_thresh",
540 	NULL
541 };
542 
543 static int ibd_create_partition(void *, intptr_t, int, cred_t *, int *);
544 static int ibd_delete_partition(void *, intptr_t, int, cred_t *, int *);
545 static int ibd_get_partition_info(void *, intptr_t, int, cred_t *, int *);
546 
547 static dld_ioc_info_t ibd_dld_ioctl_list[] = {
548 	{IBD_CREATE_IBPART, DLDCOPYINOUT, sizeof (ibpart_ioctl_t),
549 	    ibd_create_partition, secpolicy_dl_config},
550 	{IBD_DELETE_IBPART, DLDCOPYIN, sizeof (ibpart_ioctl_t),
551 	    ibd_delete_partition, secpolicy_dl_config},
552 	{IBD_INFO_IBPART, DLDCOPYIN, sizeof (ibd_ioctl_t),
553 	    ibd_get_partition_info, NULL}
554 };
555 
556 /*
557  * Fill/clear <scope> and <p_key> in multicast/broadcast address
558  */
559 #define	IBD_FILL_SCOPE_PKEY(maddr, scope, pkey)		\
560 {							\
561 	*(uint32_t *)((char *)(maddr) + 4) |=		\
562 	    htonl((uint32_t)(scope) << 16);		\
563 	*(uint32_t *)((char *)(maddr) + 8) |=		\
564 	    htonl((uint32_t)(pkey) << 16);		\
565 }
566 
567 #define	IBD_CLEAR_SCOPE_PKEY(maddr)			\
568 {							\
569 	*(uint32_t *)((char *)(maddr) + 4) &=		\
570 	    htonl(~((uint32_t)0xF << 16));		\
571 	*(uint32_t *)((char *)(maddr) + 8) &=		\
572 	    htonl(~((uint32_t)0xFFFF << 16));		\
573 }
574 
575 /*
576  * Rudimentary debugging support
577  */
578 #ifdef DEBUG
579 int ibd_debuglevel = 100;
580 void
debug_print(int l,char * fmt,...)581 debug_print(int l, char *fmt, ...)
582 {
583 	va_list ap;
584 
585 	if (l < ibd_debuglevel)
586 		return;
587 	va_start(ap, fmt);
588 	vcmn_err(CE_CONT, fmt, ap);
589 	va_end(ap);
590 }
591 #endif
592 
593 /*
594  * Common routine to print warning messages; adds in hca guid, port number
595  * and pkey to be able to identify the IBA interface.
596  */
597 void
ibd_print_warn(ibd_state_t * state,char * fmt,...)598 ibd_print_warn(ibd_state_t *state, char *fmt, ...)
599 {
600 	ib_guid_t hca_guid;
601 	char ibd_print_buf[MAXNAMELEN + 256];
602 	int len;
603 	va_list ap;
604 	char part_name[MAXNAMELEN];
605 	datalink_id_t linkid = state->id_plinkid;
606 
607 	hca_guid = ddi_prop_get_int64(DDI_DEV_T_ANY, state->id_dip,
608 	    0, "hca-guid", 0);
609 	(void) dls_mgmt_get_linkinfo(linkid, part_name, NULL, NULL, NULL);
610 	len = snprintf(ibd_print_buf, sizeof (ibd_print_buf),
611 	    "%s%d: HCA GUID %016llx port %d PKEY %02x link %s ",
612 	    ddi_driver_name(state->id_dip), ddi_get_instance(state->id_dip),
613 	    (u_longlong_t)hca_guid, state->id_port, state->id_pkey,
614 	    part_name);
615 	va_start(ap, fmt);
616 	(void) vsnprintf(ibd_print_buf + len, sizeof (ibd_print_buf) - len,
617 	    fmt, ap);
618 	cmn_err(CE_NOTE, "!%s", ibd_print_buf);
619 	va_end(ap);
620 }
621 
622 /*
623  * Warlock directives
624  */
625 
626 /*
627  * id_lso_lock
628  *
629  * state->id_lso->bkt_nfree may be accessed without a lock to
630  * determine the threshold at which we have to ask the nw layer
631  * to resume transmission (see ibd_resume_transmission()).
632  */
633 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_lso_lock,
634     ibd_state_t::id_lso))
_NOTE(DATA_READABLE_WITHOUT_LOCK (ibd_state_t::id_lso))635 _NOTE(DATA_READABLE_WITHOUT_LOCK(ibd_state_t::id_lso))
636 _NOTE(SCHEME_PROTECTS_DATA("init", ibd_state_t::id_lso_policy))
637 _NOTE(DATA_READABLE_WITHOUT_LOCK(ibd_lsobkt_t::bkt_nfree))
638 
639 /*
640  * id_scq_poll_lock
641  */
642 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_scq_poll_lock,
643     ibd_state_t::id_scq_poll_busy))
644 
645 /*
646  * id_txpost_lock
647  */
648 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_txpost_lock,
649     ibd_state_t::id_tx_head))
650 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_txpost_lock,
651     ibd_state_t::id_tx_busy))
652 
653 /*
654  * id_acache_req_lock
655  */
656 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_acache_req_lock,
657     ibd_state_t::id_acache_req_cv))
658 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_acache_req_lock,
659     ibd_state_t::id_req_list))
660 _NOTE(SCHEME_PROTECTS_DATA("atomic",
661     ibd_acache_s::ac_ref))
662 
663 /*
664  * id_ac_mutex
665  *
666  * This mutex is actually supposed to protect id_ah_op as well,
667  * but this path of the code isn't clean (see update of id_ah_op
668  * in ibd_async_acache(), immediately after the call to
669  * ibd_async_mcache()). For now, we'll skip this check by
670  * declaring that id_ah_op is protected by some internal scheme
671  * that warlock isn't aware of.
672  */
673 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_ac_mutex,
674     ibd_state_t::id_ah_active))
675 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_ac_mutex,
676     ibd_state_t::id_ah_free))
677 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_ac_mutex,
678     ibd_state_t::id_ah_addr))
679 _NOTE(SCHEME_PROTECTS_DATA("ac mutex should protect this",
680     ibd_state_t::id_ah_op))
681 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_ac_mutex,
682     ibd_state_t::id_ah_error))
683 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_ac_mutex,
684     ibd_state_t::id_ac_hot_ace))
685 _NOTE(DATA_READABLE_WITHOUT_LOCK(ibd_state_t::id_ah_error))
686 
687 /*
688  * id_mc_mutex
689  */
690 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_mc_mutex,
691     ibd_state_t::id_mc_full))
692 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_mc_mutex,
693     ibd_state_t::id_mc_non))
694 
695 /*
696  * id_trap_lock
697  */
698 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_trap_lock,
699     ibd_state_t::id_trap_cv))
700 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_trap_lock,
701     ibd_state_t::id_trap_stop))
702 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_trap_lock,
703     ibd_state_t::id_trap_inprog))
704 
705 /*
706  * id_prom_op
707  */
708 _NOTE(SCHEME_PROTECTS_DATA("only by async thread",
709     ibd_state_t::id_prom_op))
710 
711 /*
712  * id_sched_lock
713  */
714 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_sched_lock,
715     ibd_state_t::id_sched_needed))
716 
717 /*
718  * id_link_mutex
719  */
720 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_link_mutex,
721     ibd_state_t::id_link_state))
722 _NOTE(DATA_READABLE_WITHOUT_LOCK(ibd_state_t::id_link_state))
723 _NOTE(SCHEME_PROTECTS_DATA("only async thr and ibd_m_start",
724     ibd_state_t::id_link_speed))
725 _NOTE(DATA_READABLE_WITHOUT_LOCK(ibd_state_t::id_sgid))
726 
727 /*
728  * id_tx_list.dl_mutex
729  */
730 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_tx_list.dl_mutex,
731     ibd_state_t::id_tx_list.dl_head))
732 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_tx_list.dl_mutex,
733     ibd_state_t::id_tx_list.dl_pending_sends))
734 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::id_tx_list.dl_mutex,
735     ibd_state_t::id_tx_list.dl_cnt))
736 
737 /*
738  * id_rx_list.dl_mutex
739  */
740 _NOTE(SCHEME_PROTECTS_DATA("atomic or dl mutex or single thr",
741     ibd_state_t::id_rx_list.dl_bufs_outstanding))
742 _NOTE(SCHEME_PROTECTS_DATA("atomic or dl mutex or single thr",
743     ibd_state_t::id_rx_list.dl_cnt))
744 
745 /*
746  * rc_timeout_lock
747  */
748 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::rc_timeout_lock,
749     ibd_state_t::rc_timeout_start))
750 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_t::rc_timeout_lock,
751     ibd_state_t::rc_timeout))
752 
753 
754 /*
755  * Items protected by atomic updates
756  */
757 _NOTE(SCHEME_PROTECTS_DATA("atomic update only",
758     ibd_state_s::id_brd_rcv
759     ibd_state_s::id_brd_xmt
760     ibd_state_s::id_multi_rcv
761     ibd_state_s::id_multi_xmt
762     ibd_state_s::id_num_intrs
763     ibd_state_s::id_rcv_bytes
764     ibd_state_s::id_rcv_pkt
765     ibd_state_s::id_rx_post_queue_index
766     ibd_state_s::id_tx_short
767     ibd_state_s::id_xmt_bytes
768     ibd_state_s::id_xmt_pkt
769     ibd_state_s::rc_rcv_trans_byte
770     ibd_state_s::rc_rcv_trans_pkt
771     ibd_state_s::rc_rcv_copy_byte
772     ibd_state_s::rc_rcv_copy_pkt
773     ibd_state_s::rc_xmt_bytes
774     ibd_state_s::rc_xmt_small_pkt
775     ibd_state_s::rc_xmt_fragmented_pkt
776     ibd_state_s::rc_xmt_map_fail_pkt
777     ibd_state_s::rc_xmt_map_succ_pkt
778     ibd_rc_chan_s::rcq_invoking))
779 
780 /*
781  * Non-mutex protection schemes for data elements. Almost all of
782  * these are non-shared items.
783  */
784 _NOTE(SCHEME_PROTECTS_DATA("unshared or single-threaded",
785     callb_cpr
786     ib_gid_s
787     ib_header_info
788     ibd_acache_rq
789     ibd_acache_s::ac_mce
790     ibd_acache_s::ac_chan
791     ibd_mcache::mc_fullreap
792     ibd_mcache::mc_jstate
793     ibd_mcache::mc_req
794     ibd_rwqe_s
795     ibd_swqe_s
796     ibd_wqe_s
797     ibt_wr_ds_s::ds_va
798     ibt_wr_lso_s
799     ipoib_mac::ipoib_qpn
800     mac_capab_lso_s
801     msgb::b_next
802     msgb::b_cont
803     msgb::b_rptr
804     msgb::b_wptr
805     ibd_state_s::id_bgroup_created
806     ibd_state_s::id_mac_state
807     ibd_state_s::id_mtu
808     ibd_state_s::id_ud_num_rwqe
809     ibd_state_s::id_ud_num_swqe
810     ibd_state_s::id_qpnum
811     ibd_state_s::id_rcq_hdl
812     ibd_state_s::id_rx_buf_sz
813     ibd_state_s::id_rx_bufs
814     ibd_state_s::id_rx_mr_hdl
815     ibd_state_s::id_rx_wqes
816     ibd_state_s::id_rxwcs
817     ibd_state_s::id_rxwcs_size
818     ibd_state_s::id_rx_nqueues
819     ibd_state_s::id_rx_queues
820     ibd_state_s::id_scope
821     ibd_state_s::id_scq_hdl
822     ibd_state_s::id_tx_buf_sz
823     ibd_state_s::id_tx_bufs
824     ibd_state_s::id_tx_mr_hdl
825     ibd_state_s::id_tx_rel_list.dl_cnt
826     ibd_state_s::id_tx_wqes
827     ibd_state_s::id_txwcs
828     ibd_state_s::id_txwcs_size
829     ibd_state_s::rc_listen_hdl
830     ibd_state_s::rc_listen_hdl_OFED_interop
831     ibd_state_s::rc_srq_size
832     ibd_state_s::rc_srq_rwqes
833     ibd_state_s::rc_srq_rx_bufs
834     ibd_state_s::rc_srq_rx_mr_hdl
835     ibd_state_s::rc_tx_largebuf_desc_base
836     ibd_state_s::rc_tx_mr_bufs
837     ibd_state_s::rc_tx_mr_hdl
838     ipha_s
839     icmph_s
840     ibt_path_info_s::pi_sid
841     ibd_rc_chan_s::ace
842     ibd_rc_chan_s::chan_hdl
843     ibd_rc_chan_s::state
844     ibd_rc_chan_s::chan_state
845     ibd_rc_chan_s::is_tx_chan
846     ibd_rc_chan_s::rcq_hdl
847     ibd_rc_chan_s::rcq_size
848     ibd_rc_chan_s::scq_hdl
849     ibd_rc_chan_s::scq_size
850     ibd_rc_chan_s::rx_bufs
851     ibd_rc_chan_s::rx_mr_hdl
852     ibd_rc_chan_s::rx_rwqes
853     ibd_rc_chan_s::tx_wqes
854     ibd_rc_chan_s::tx_mr_bufs
855     ibd_rc_chan_s::tx_mr_hdl
856     ibd_rc_chan_s::tx_rel_list.dl_cnt
857     ibd_rc_chan_s::is_used
858     ibd_rc_tx_largebuf_s::lb_buf
859     ibd_rc_msg_hello_s
860     ibt_cm_return_args_s))
861 
862 /*
863  * ibd_rc_chan_s::next is protected by two mutexes:
864  * 1) ibd_state_s::rc_pass_chan_list.chan_list_mutex
865  * 2) ibd_state_s::rc_obs_act_chan_list.chan_list_mutex.
866  */
867 _NOTE(SCHEME_PROTECTS_DATA("protected by two mutexes",
868     ibd_rc_chan_s::next))
869 
870 /*
871  * ibd_state_s.rc_tx_large_bufs_lock
872  */
873 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_s::rc_tx_large_bufs_lock,
874     ibd_state_s::rc_tx_largebuf_free_head))
875 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_s::rc_tx_large_bufs_lock,
876     ibd_state_s::rc_tx_largebuf_nfree))
877 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_s::rc_tx_large_bufs_lock,
878     ibd_rc_tx_largebuf_s::lb_next))
879 
880 /*
881  * ibd_acache_s.tx_too_big_mutex
882  */
883 _NOTE(MUTEX_PROTECTS_DATA(ibd_acache_s::tx_too_big_mutex,
884     ibd_acache_s::tx_too_big_ongoing))
885 
886 /*
887  * tx_wqe_list.dl_mutex
888  */
889 _NOTE(MUTEX_PROTECTS_DATA(ibd_rc_chan_s::tx_wqe_list.dl_mutex,
890     ibd_rc_chan_s::tx_wqe_list.dl_head))
891 _NOTE(MUTEX_PROTECTS_DATA(ibd_rc_chan_s::tx_wqe_list.dl_mutex,
892     ibd_rc_chan_s::tx_wqe_list.dl_pending_sends))
893 _NOTE(MUTEX_PROTECTS_DATA(ibd_rc_chan_s::tx_wqe_list.dl_mutex,
894     ibd_rc_chan_s::tx_wqe_list.dl_cnt))
895 
896 /*
897  * ibd_state_s.rc_ace_recycle_lock
898  */
899 _NOTE(MUTEX_PROTECTS_DATA(ibd_state_s::rc_ace_recycle_lock,
900     ibd_state_s::rc_ace_recycle))
901 
902 /*
903  * rc_srq_rwqe_list.dl_mutex
904  */
905 _NOTE(SCHEME_PROTECTS_DATA("atomic or dl mutex or single thr",
906     ibd_state_t::rc_srq_rwqe_list.dl_bufs_outstanding))
907 _NOTE(SCHEME_PROTECTS_DATA("atomic or dl mutex or single thr",
908     ibd_state_t::rc_srq_rwqe_list.dl_cnt))
909 
910 /*
911  * Non-mutex protection schemes for data elements. They are counters
912  * for problem diagnosis. Don't need be protected.
913  */
914 _NOTE(SCHEME_PROTECTS_DATA("counters for problem diagnosis",
915     ibd_state_s::rc_rcv_alloc_fail
916     ibd_state_s::rc_rcq_err
917     ibd_state_s::rc_ace_not_found
918     ibd_state_s::rc_xmt_drop_too_long_pkt
919     ibd_state_s::rc_xmt_icmp_too_long_pkt
920     ibd_state_s::rc_xmt_reenter_too_long_pkt
921     ibd_state_s::rc_swqe_short
922     ibd_state_s::rc_swqe_mac_update
923     ibd_state_s::rc_xmt_buf_short
924     ibd_state_s::rc_xmt_buf_mac_update
925     ibd_state_s::rc_scq_no_swqe
926     ibd_state_s::rc_scq_no_largebuf
927     ibd_state_s::rc_conn_succ
928     ibd_state_s::rc_conn_fail
929     ibd_state_s::rc_null_conn
930     ibd_state_s::rc_no_estab_conn
931     ibd_state_s::rc_act_close
932     ibd_state_s::rc_pas_close
933     ibd_state_s::rc_delay_ace_recycle
934     ibd_state_s::rc_act_close_simultaneous
935     ibd_state_s::rc_act_close_not_clean
936     ibd_state_s::rc_pas_close_rcq_invoking
937     ibd_state_s::rc_reset_cnt
938     ibd_state_s::rc_timeout_act
939     ibd_state_s::rc_timeout_pas
940     ibd_state_s::rc_stop_connect))
941 
942 #ifdef DEBUG
943 /*
944  * Non-mutex protection schemes for data elements. They are counters
945  * for problem diagnosis. Don't need be protected.
946  */
947 _NOTE(SCHEME_PROTECTS_DATA("counters for problem diagnosis",
948     ibd_state_s::rc_rwqe_short
949     ibd_rc_stat_s::rc_rcv_trans_byte
950     ibd_rc_stat_s::rc_rcv_trans_pkt
951     ibd_rc_stat_s::rc_rcv_copy_byte
952     ibd_rc_stat_s::rc_rcv_copy_pkt
953     ibd_rc_stat_s::rc_rcv_alloc_fail
954     ibd_rc_stat_s::rc_rcq_err
955     ibd_rc_stat_s::rc_rwqe_short
956     ibd_rc_stat_s::rc_xmt_bytes
957     ibd_rc_stat_s::rc_xmt_small_pkt
958     ibd_rc_stat_s::rc_xmt_fragmented_pkt
959     ibd_rc_stat_s::rc_xmt_map_fail_pkt
960     ibd_rc_stat_s::rc_xmt_map_succ_pkt
961     ibd_rc_stat_s::rc_ace_not_found
962     ibd_rc_stat_s::rc_scq_no_swqe
963     ibd_rc_stat_s::rc_scq_no_largebuf
964     ibd_rc_stat_s::rc_swqe_short
965     ibd_rc_stat_s::rc_swqe_mac_update
966     ibd_rc_stat_s::rc_xmt_buf_short
967     ibd_rc_stat_s::rc_xmt_buf_mac_update
968     ibd_rc_stat_s::rc_conn_succ
969     ibd_rc_stat_s::rc_conn_fail
970     ibd_rc_stat_s::rc_null_conn
971     ibd_rc_stat_s::rc_no_estab_conn
972     ibd_rc_stat_s::rc_act_close
973     ibd_rc_stat_s::rc_pas_close
974     ibd_rc_stat_s::rc_delay_ace_recycle
975     ibd_rc_stat_s::rc_act_close_simultaneous
976     ibd_rc_stat_s::rc_reset_cnt
977     ibd_rc_stat_s::rc_timeout_act
978     ibd_rc_stat_s::rc_timeout_pas))
979 #endif
980 
981 int
982 _init()
983 {
984 	int status;
985 
986 	status = ddi_soft_state_init(&ibd_list, max(sizeof (ibd_state_t),
987 	    PAGESIZE), 0);
988 	if (status != 0) {
989 		DPRINT(10, "_init:failed in ddi_soft_state_init()");
990 		return (status);
991 	}
992 
993 	mutex_init(&ibd_objlist_lock, NULL, MUTEX_DRIVER, NULL);
994 
995 	mac_init_ops(&ibd_dev_ops, "ibp");
996 	status = mod_install(&ibd_modlinkage);
997 	if (status != 0) {
998 		DPRINT(10, "_init:failed in mod_install()");
999 		ddi_soft_state_fini(&ibd_list);
1000 		mac_fini_ops(&ibd_dev_ops);
1001 		return (status);
1002 	}
1003 
1004 	mutex_init(&ibd_gstate.ig_mutex, NULL, MUTEX_DRIVER, NULL);
1005 	mutex_enter(&ibd_gstate.ig_mutex);
1006 	ibd_gstate.ig_ibt_hdl = NULL;
1007 	ibd_gstate.ig_ibt_hdl_ref_cnt = 0;
1008 	ibd_gstate.ig_service_list = NULL;
1009 	mutex_exit(&ibd_gstate.ig_mutex);
1010 
1011 	if (dld_ioc_register(IBPART_IOC, ibd_dld_ioctl_list,
1012 	    DLDIOCCNT(ibd_dld_ioctl_list)) != 0) {
1013 		return (EIO);
1014 	}
1015 
1016 	ibt_register_part_attr_cb(ibd_get_part_attr, ibd_get_all_part_attr);
1017 
1018 #ifdef IBD_LOGGING
1019 	ibd_log_init();
1020 #endif
1021 	return (0);
1022 }
1023 
1024 int
_info(struct modinfo * modinfop)1025 _info(struct modinfo *modinfop)
1026 {
1027 	return (mod_info(&ibd_modlinkage, modinfop));
1028 }
1029 
1030 int
_fini()1031 _fini()
1032 {
1033 	int status;
1034 
1035 	status = mod_remove(&ibd_modlinkage);
1036 	if (status != 0)
1037 		return (status);
1038 
1039 	ibt_unregister_part_attr_cb();
1040 
1041 	mac_fini_ops(&ibd_dev_ops);
1042 	mutex_destroy(&ibd_objlist_lock);
1043 	ddi_soft_state_fini(&ibd_list);
1044 	mutex_destroy(&ibd_gstate.ig_mutex);
1045 #ifdef IBD_LOGGING
1046 	ibd_log_fini();
1047 #endif
1048 	return (0);
1049 }
1050 
1051 /*
1052  * Convert the GID part of the mac address from network byte order
1053  * to host order.
1054  */
1055 static void
ibd_n2h_gid(ipoib_mac_t * mac,ib_gid_t * dgid)1056 ibd_n2h_gid(ipoib_mac_t *mac, ib_gid_t *dgid)
1057 {
1058 	ib_sn_prefix_t nbopref;
1059 	ib_guid_t nboguid;
1060 
1061 	bcopy(mac->ipoib_gidpref, &nbopref, sizeof (ib_sn_prefix_t));
1062 	bcopy(mac->ipoib_gidsuff, &nboguid, sizeof (ib_guid_t));
1063 	dgid->gid_prefix = b2h64(nbopref);
1064 	dgid->gid_guid = b2h64(nboguid);
1065 }
1066 
1067 /*
1068  * Create the IPoIB address in network byte order from host order inputs.
1069  */
1070 static void
ibd_h2n_mac(ipoib_mac_t * mac,ib_qpn_t qpn,ib_sn_prefix_t prefix,ib_guid_t guid)1071 ibd_h2n_mac(ipoib_mac_t *mac, ib_qpn_t qpn, ib_sn_prefix_t prefix,
1072     ib_guid_t guid)
1073 {
1074 	ib_sn_prefix_t nbopref;
1075 	ib_guid_t nboguid;
1076 
1077 	mac->ipoib_qpn = htonl(qpn);
1078 	nbopref = h2b64(prefix);
1079 	nboguid = h2b64(guid);
1080 	bcopy(&nbopref, mac->ipoib_gidpref, sizeof (ib_sn_prefix_t));
1081 	bcopy(&nboguid, mac->ipoib_gidsuff, sizeof (ib_guid_t));
1082 }
1083 
1084 /*
1085  * Send to the appropriate all-routers group when the IBA multicast group
1086  * does not exist, based on whether the target group is v4 or v6.
1087  */
1088 static boolean_t
ibd_get_allroutergroup(ibd_state_t * state,ipoib_mac_t * mcmac,ipoib_mac_t * rmac)1089 ibd_get_allroutergroup(ibd_state_t *state, ipoib_mac_t *mcmac,
1090     ipoib_mac_t *rmac)
1091 {
1092 	boolean_t retval = B_TRUE;
1093 	uint32_t adjscope = state->id_scope << 16;
1094 	uint32_t topword;
1095 
1096 	/*
1097 	 * Copy the first 4 bytes in without assuming any alignment of
1098 	 * input mac address; this will have IPoIB signature, flags and
1099 	 * scope bits.
1100 	 */
1101 	bcopy(mcmac->ipoib_gidpref, &topword, sizeof (uint32_t));
1102 	topword = ntohl(topword);
1103 
1104 	/*
1105 	 * Generate proper address for IPv4/v6, adding in the Pkey properly.
1106 	 */
1107 	if ((topword == (IB_MCGID_IPV4_PREFIX | adjscope)) ||
1108 	    (topword == (IB_MCGID_IPV6_PREFIX | adjscope)))
1109 		ibd_h2n_mac(rmac, IB_MC_QPN, (((uint64_t)topword << 32) |
1110 		    ((uint32_t)(state->id_pkey << 16))),
1111 		    (INADDR_ALLRTRS_GROUP - INADDR_UNSPEC_GROUP));
1112 	else
1113 		/*
1114 		 * Does not have proper bits in the mgid address.
1115 		 */
1116 		retval = B_FALSE;
1117 
1118 	return (retval);
1119 }
1120 
1121 /*
1122  * Membership states for different mcg's are tracked by two lists:
1123  * the "non" list is used for promiscuous mode, when all mcg traffic
1124  * needs to be inspected. This type of membership is never used for
1125  * transmission, so there can not be an AH in the active list
1126  * corresponding to a member in this list. This list does not need
1127  * any protection, since all operations are performed by the async
1128  * thread.
1129  *
1130  * "Full" and "SendOnly" membership is tracked using a single list,
1131  * the "full" list. This is because this single list can then be
1132  * searched during transmit to a multicast group (if an AH for the
1133  * mcg is not found in the active list), since at least one type
1134  * of membership must be present before initiating the transmit.
1135  * This list is also emptied during driver detach, since sendonly
1136  * membership acquired during transmit is dropped at detach time
1137  * along with ipv4 broadcast full membership. Insert/deletes to
1138  * this list are done only by the async thread, but it is also
1139  * searched in program context (see multicast disable case), thus
1140  * the id_mc_mutex protects the list. The driver detach path also
1141  * deconstructs the "full" list, but it ensures that the async
1142  * thread will not be accessing the list (by blocking out mcg
1143  * trap handling and making sure no more Tx reaping will happen).
1144  *
1145  * Currently, an IBA attach is done in the SendOnly case too,
1146  * although this is not required.
1147  */
1148 #define	IBD_MCACHE_INSERT_FULL(state, mce) \
1149 	list_insert_head(&state->id_mc_full, mce)
1150 #define	IBD_MCACHE_INSERT_NON(state, mce) \
1151 	list_insert_head(&state->id_mc_non, mce)
1152 #define	IBD_MCACHE_FIND_FULL(state, mgid) \
1153 	ibd_mcache_find(mgid, &state->id_mc_full)
1154 #define	IBD_MCACHE_FIND_NON(state, mgid) \
1155 	ibd_mcache_find(mgid, &state->id_mc_non)
1156 #define	IBD_MCACHE_PULLOUT_FULL(state, mce) \
1157 	list_remove(&state->id_mc_full, mce)
1158 #define	IBD_MCACHE_PULLOUT_NON(state, mce) \
1159 	list_remove(&state->id_mc_non, mce)
1160 
1161 static void *
list_get_head(list_t * list)1162 list_get_head(list_t *list)
1163 {
1164 	list_node_t *lhead = list_head(list);
1165 
1166 	if (lhead != NULL)
1167 		list_remove(list, lhead);
1168 	return (lhead);
1169 }
1170 
1171 /*
1172  * This is always guaranteed to be able to queue the work.
1173  */
1174 void
ibd_queue_work_slot(ibd_state_t * state,ibd_req_t * ptr,int op)1175 ibd_queue_work_slot(ibd_state_t *state, ibd_req_t *ptr, int op)
1176 {
1177 	/* Initialize request */
1178 	DPRINT(1, "ibd_queue_work_slot : op: %d \n", op);
1179 	ptr->rq_op = op;
1180 
1181 	/*
1182 	 * Queue provided slot onto request pool.
1183 	 */
1184 	mutex_enter(&state->id_acache_req_lock);
1185 	list_insert_tail(&state->id_req_list, ptr);
1186 
1187 	/* Go, fetch, async thread */
1188 	cv_signal(&state->id_acache_req_cv);
1189 	mutex_exit(&state->id_acache_req_lock);
1190 }
1191 
1192 /*
1193  * Main body of the per interface async thread.
1194  */
1195 static void
ibd_async_work(ibd_state_t * state)1196 ibd_async_work(ibd_state_t *state)
1197 {
1198 	ibd_req_t *ptr;
1199 	callb_cpr_t cprinfo;
1200 
1201 	mutex_enter(&state->id_acache_req_lock);
1202 	CALLB_CPR_INIT(&cprinfo, &state->id_acache_req_lock,
1203 	    callb_generic_cpr, "ibd_async_work");
1204 
1205 	for (;;) {
1206 		ptr = list_get_head(&state->id_req_list);
1207 		if (ptr != NULL) {
1208 			mutex_exit(&state->id_acache_req_lock);
1209 
1210 			/*
1211 			 * If we are in late hca initialization mode, do not
1212 			 * process any other async request other than TRAP. TRAP
1213 			 * is used for indicating creation of a broadcast group;
1214 			 * in which case, we need to join/create the group.
1215 			 */
1216 			if ((state->id_mac_state & IBD_DRV_IN_LATE_HCA_INIT) &&
1217 			    (ptr->rq_op != IBD_ASYNC_TRAP)) {
1218 				goto free_req_and_continue;
1219 			}
1220 
1221 			/*
1222 			 * Once we have done the operation, there is no
1223 			 * guarantee the request slot is going to be valid,
1224 			 * it might be freed up (as in IBD_ASYNC_LEAVE, REAP,
1225 			 * TRAP).
1226 			 *
1227 			 * Perform the request.
1228 			 */
1229 			switch (ptr->rq_op) {
1230 				case IBD_ASYNC_GETAH:
1231 					ibd_async_acache(state, &ptr->rq_mac);
1232 					break;
1233 				case IBD_ASYNC_JOIN:
1234 				case IBD_ASYNC_LEAVE:
1235 					ibd_async_multicast(state,
1236 					    ptr->rq_gid, ptr->rq_op);
1237 					break;
1238 				case IBD_ASYNC_PROMON:
1239 					ibd_async_setprom(state);
1240 					break;
1241 				case IBD_ASYNC_PROMOFF:
1242 					ibd_async_unsetprom(state);
1243 					break;
1244 				case IBD_ASYNC_REAP:
1245 					ibd_async_reap_group(state,
1246 					    ptr->rq_ptr, ptr->rq_gid,
1247 					    IB_MC_JSTATE_FULL);
1248 					/*
1249 					 * the req buf contains in mce
1250 					 * structure, so we do not need
1251 					 * to free it here.
1252 					 */
1253 					ptr = NULL;
1254 					break;
1255 				case IBD_ASYNC_TRAP:
1256 					ibd_async_trap(state, ptr);
1257 					break;
1258 				case IBD_ASYNC_SCHED:
1259 					ibd_async_txsched(state);
1260 					break;
1261 				case IBD_ASYNC_LINK:
1262 					ibd_async_link(state, ptr);
1263 					break;
1264 				case IBD_ASYNC_EXIT:
1265 					mutex_enter(&state->id_acache_req_lock);
1266 #ifndef __lock_lint
1267 					CALLB_CPR_EXIT(&cprinfo);
1268 #else
1269 					mutex_exit(&state->id_acache_req_lock);
1270 #endif
1271 					return;
1272 				case IBD_ASYNC_RC_TOO_BIG:
1273 					ibd_async_rc_process_too_big(state,
1274 					    ptr);
1275 					break;
1276 				case IBD_ASYNC_RC_CLOSE_ACT_CHAN:
1277 					ibd_async_rc_close_act_chan(state, ptr);
1278 					break;
1279 				case IBD_ASYNC_RC_RECYCLE_ACE:
1280 					ibd_async_rc_recycle_ace(state, ptr);
1281 					break;
1282 				case IBD_ASYNC_RC_CLOSE_PAS_CHAN:
1283 					(void) ibd_rc_pas_close(ptr->rq_ptr,
1284 					    B_TRUE, B_TRUE);
1285 					break;
1286 			}
1287 free_req_and_continue:
1288 			if (ptr != NULL)
1289 				kmem_cache_free(state->id_req_kmc, ptr);
1290 
1291 			mutex_enter(&state->id_acache_req_lock);
1292 		} else {
1293 #ifndef __lock_lint
1294 			/*
1295 			 * Nothing to do: wait till new request arrives.
1296 			 */
1297 			CALLB_CPR_SAFE_BEGIN(&cprinfo);
1298 			cv_wait(&state->id_acache_req_cv,
1299 			    &state->id_acache_req_lock);
1300 			CALLB_CPR_SAFE_END(&cprinfo,
1301 			    &state->id_acache_req_lock);
1302 #endif
1303 		}
1304 	}
1305 
1306 	/*NOTREACHED*/
1307 	_NOTE(NOT_REACHED)
1308 }
1309 
1310 /*
1311  * Return when it is safe to queue requests to the async daemon; primarily
1312  * for subnet trap and async event handling. Disallow requests before the
1313  * daemon is created, and when interface deinitilization starts.
1314  */
1315 static boolean_t
ibd_async_safe(ibd_state_t * state)1316 ibd_async_safe(ibd_state_t *state)
1317 {
1318 	mutex_enter(&state->id_trap_lock);
1319 	if (state->id_trap_stop) {
1320 		mutex_exit(&state->id_trap_lock);
1321 		return (B_FALSE);
1322 	}
1323 	state->id_trap_inprog++;
1324 	mutex_exit(&state->id_trap_lock);
1325 	return (B_TRUE);
1326 }
1327 
1328 /*
1329  * Wake up ibd_m_stop() if the unplumb code is waiting for pending subnet
1330  * trap or event handling to complete to kill the async thread and deconstruct
1331  * the mcg/ace list.
1332  */
1333 static void
ibd_async_done(ibd_state_t * state)1334 ibd_async_done(ibd_state_t *state)
1335 {
1336 	mutex_enter(&state->id_trap_lock);
1337 	if (--state->id_trap_inprog == 0)
1338 		cv_signal(&state->id_trap_cv);
1339 	mutex_exit(&state->id_trap_lock);
1340 }
1341 
1342 /*
1343  * Hash functions:
1344  * ibd_hash_by_id: Returns the qpn as the hash entry into bucket.
1345  * ibd_hash_key_cmp: Compares two keys, return 0 on success or else 1.
1346  * These operate on mac addresses input into ibd_send, but there is no
1347  * guarantee on the alignment of the ipoib_mac_t structure.
1348  */
1349 /*ARGSUSED*/
1350 static uint_t
ibd_hash_by_id(void * hash_data,mod_hash_key_t key)1351 ibd_hash_by_id(void *hash_data, mod_hash_key_t key)
1352 {
1353 	ulong_t ptraddr = (ulong_t)key;
1354 	uint_t hval;
1355 
1356 	/*
1357 	 * If the input address is 4 byte aligned, we can just dereference
1358 	 * it. This is most common, since IP will send in a 4 byte aligned
1359 	 * IP header, which implies the 24 byte IPoIB psuedo header will be
1360 	 * 4 byte aligned too.
1361 	 */
1362 	if ((ptraddr & 3) == 0)
1363 		return ((uint_t)((ipoib_mac_t *)key)->ipoib_qpn);
1364 
1365 	bcopy(&(((ipoib_mac_t *)key)->ipoib_qpn), &hval, sizeof (uint_t));
1366 	return (hval);
1367 }
1368 
1369 static int
ibd_hash_key_cmp(mod_hash_key_t key1,mod_hash_key_t key2)1370 ibd_hash_key_cmp(mod_hash_key_t key1, mod_hash_key_t key2)
1371 {
1372 	if (bcmp((char *)key1, (char *)key2, IPOIB_ADDRL) == 0)
1373 		return (0);
1374 	else
1375 		return (1);
1376 }
1377 
1378 /*
1379  * Initialize all the per interface caches and lists; AH cache,
1380  * MCG list etc.
1381  */
1382 static int
ibd_acache_init(ibd_state_t * state)1383 ibd_acache_init(ibd_state_t *state)
1384 {
1385 	ibd_ace_t *ce;
1386 	int i;
1387 
1388 	mutex_init(&state->id_ac_mutex, NULL, MUTEX_DRIVER, NULL);
1389 	mutex_init(&state->id_mc_mutex, NULL, MUTEX_DRIVER, NULL);
1390 	mutex_enter(&state->id_ac_mutex);
1391 	list_create(&state->id_ah_free, sizeof (ibd_ace_t),
1392 	    offsetof(ibd_ace_t, ac_list));
1393 	list_create(&state->id_ah_active, sizeof (ibd_ace_t),
1394 	    offsetof(ibd_ace_t, ac_list));
1395 	state->id_ah_active_hash = mod_hash_create_extended("IBD AH hash",
1396 	    state->id_hash_size, mod_hash_null_keydtor, mod_hash_null_valdtor,
1397 	    ibd_hash_by_id, NULL, ibd_hash_key_cmp, KM_SLEEP);
1398 	list_create(&state->id_mc_full, sizeof (ibd_mce_t),
1399 	    offsetof(ibd_mce_t, mc_list));
1400 	list_create(&state->id_mc_non, sizeof (ibd_mce_t),
1401 	    offsetof(ibd_mce_t, mc_list));
1402 	state->id_ac_hot_ace = NULL;
1403 
1404 	state->id_ac_list = ce = (ibd_ace_t *)kmem_zalloc(sizeof (ibd_ace_t) *
1405 	    state->id_num_ah, KM_SLEEP);
1406 	for (i = 0; i < state->id_num_ah; i++, ce++) {
1407 		if (ibt_alloc_ud_dest(state->id_hca_hdl, IBT_UD_DEST_NO_FLAGS,
1408 		    state->id_pd_hdl, &ce->ac_dest) != IBT_SUCCESS) {
1409 			mutex_exit(&state->id_ac_mutex);
1410 			ibd_acache_fini(state);
1411 			return (DDI_FAILURE);
1412 		} else {
1413 			CLEAR_REFCYCLE(ce);
1414 			ce->ac_mce = NULL;
1415 			mutex_init(&ce->tx_too_big_mutex, NULL,
1416 			    MUTEX_DRIVER, NULL);
1417 			IBD_ACACHE_INSERT_FREE(state, ce);
1418 		}
1419 	}
1420 	mutex_exit(&state->id_ac_mutex);
1421 	return (DDI_SUCCESS);
1422 }
1423 
1424 static void
ibd_acache_fini(ibd_state_t * state)1425 ibd_acache_fini(ibd_state_t *state)
1426 {
1427 	ibd_ace_t *ptr;
1428 
1429 	mutex_enter(&state->id_ac_mutex);
1430 
1431 	while ((ptr = IBD_ACACHE_GET_ACTIVE(state)) != NULL) {
1432 		ASSERT(GET_REF(ptr) == 0);
1433 		mutex_destroy(&ptr->tx_too_big_mutex);
1434 		(void) ibt_free_ud_dest(ptr->ac_dest);
1435 	}
1436 
1437 	while ((ptr = IBD_ACACHE_GET_FREE(state)) != NULL) {
1438 		ASSERT(GET_REF(ptr) == 0);
1439 		mutex_destroy(&ptr->tx_too_big_mutex);
1440 		(void) ibt_free_ud_dest(ptr->ac_dest);
1441 	}
1442 
1443 	list_destroy(&state->id_ah_free);
1444 	list_destroy(&state->id_ah_active);
1445 	list_destroy(&state->id_mc_full);
1446 	list_destroy(&state->id_mc_non);
1447 	kmem_free(state->id_ac_list, sizeof (ibd_ace_t) * state->id_num_ah);
1448 	mutex_exit(&state->id_ac_mutex);
1449 	mutex_destroy(&state->id_ac_mutex);
1450 	mutex_destroy(&state->id_mc_mutex);
1451 }
1452 
1453 /*
1454  * Search AH active hash list for a cached path to input destination.
1455  * If we are "just looking", hold == F. When we are in the Tx path,
1456  * we set hold == T to grab a reference on the AH so that it can not
1457  * be recycled to a new destination while the Tx request is posted.
1458  */
1459 ibd_ace_t *
ibd_acache_find(ibd_state_t * state,ipoib_mac_t * mac,boolean_t hold,int num)1460 ibd_acache_find(ibd_state_t *state, ipoib_mac_t *mac, boolean_t hold, int num)
1461 {
1462 	ibd_ace_t *ptr;
1463 
1464 	ASSERT(mutex_owned(&state->id_ac_mutex));
1465 
1466 	/*
1467 	 * Do hash search.
1468 	 */
1469 	if (mod_hash_find(state->id_ah_active_hash,
1470 	    (mod_hash_key_t)mac, (mod_hash_val_t)&ptr) == 0) {
1471 		if (hold)
1472 			INC_REF(ptr, num);
1473 		return (ptr);
1474 	}
1475 	return (NULL);
1476 }
1477 
1478 /*
1479  * This is called by the tx side; if an initialized AH is found in
1480  * the active list, it is locked down and can be used; if no entry
1481  * is found, an async request is queued to do path resolution.
1482  */
1483 static ibd_ace_t *
ibd_acache_lookup(ibd_state_t * state,ipoib_mac_t * mac,int * err,int numwqe)1484 ibd_acache_lookup(ibd_state_t *state, ipoib_mac_t *mac, int *err, int numwqe)
1485 {
1486 	ibd_ace_t *ptr;
1487 	ibd_req_t *req;
1488 
1489 	/*
1490 	 * Only attempt to print when we can; in the mdt pattr case, the
1491 	 * address is not aligned properly.
1492 	 */
1493 	if (((ulong_t)mac & 3) == 0) {
1494 		DPRINT(4,
1495 		    "ibd_acache_lookup : lookup for %08X:%08X:%08X:%08X:%08X",
1496 		    htonl(mac->ipoib_qpn), htonl(mac->ipoib_gidpref[0]),
1497 		    htonl(mac->ipoib_gidpref[1]), htonl(mac->ipoib_gidsuff[0]),
1498 		    htonl(mac->ipoib_gidsuff[1]));
1499 	}
1500 
1501 	mutex_enter(&state->id_ac_mutex);
1502 
1503 	if (((ptr = state->id_ac_hot_ace) != NULL) &&
1504 	    (memcmp(&ptr->ac_mac, mac, sizeof (*mac)) == 0)) {
1505 		INC_REF(ptr, numwqe);
1506 		mutex_exit(&state->id_ac_mutex);
1507 		return (ptr);
1508 	}
1509 	if (((ptr = ibd_acache_find(state, mac, B_TRUE, numwqe)) != NULL)) {
1510 		state->id_ac_hot_ace = ptr;
1511 		mutex_exit(&state->id_ac_mutex);
1512 		return (ptr);
1513 	}
1514 
1515 	/*
1516 	 * Implementation of a single outstanding async request; if
1517 	 * the operation is not started yet, queue a request and move
1518 	 * to ongoing state. Remember in id_ah_addr for which address
1519 	 * we are queueing the request, in case we need to flag an error;
1520 	 * Any further requests, for the same or different address, until
1521 	 * the operation completes, is sent back to GLDv3 to be retried.
1522 	 * The async thread will update id_ah_op with an error indication
1523 	 * or will set it to indicate the next look up can start; either
1524 	 * way, it will mac_tx_update() so that all blocked requests come
1525 	 * back here.
1526 	 */
1527 	*err = EAGAIN;
1528 	if (state->id_ah_op == IBD_OP_NOTSTARTED) {
1529 		req = kmem_cache_alloc(state->id_req_kmc, KM_NOSLEEP);
1530 		if (req != NULL) {
1531 			/*
1532 			 * We did not even find the entry; queue a request
1533 			 * for it.
1534 			 */
1535 			bcopy(mac, &(req->rq_mac), IPOIB_ADDRL);
1536 			state->id_ah_op = IBD_OP_ONGOING;
1537 			ibd_queue_work_slot(state, req, IBD_ASYNC_GETAH);
1538 			bcopy(mac, &state->id_ah_addr, IPOIB_ADDRL);
1539 		}
1540 	} else if ((state->id_ah_op != IBD_OP_ONGOING) &&
1541 	    (bcmp(&state->id_ah_addr, mac, IPOIB_ADDRL) == 0)) {
1542 		/*
1543 		 * Check the status of the pathrecord lookup request
1544 		 * we had queued before.
1545 		 */
1546 		if (state->id_ah_op == IBD_OP_ERRORED) {
1547 			*err = EFAULT;
1548 			state->id_ah_error++;
1549 		} else {
1550 			/*
1551 			 * IBD_OP_ROUTERED case: We need to send to the
1552 			 * all-router MCG. If we can find the AH for
1553 			 * the mcg, the Tx will be attempted. If we
1554 			 * do not find the AH, we return NORESOURCES
1555 			 * to retry.
1556 			 */
1557 			ipoib_mac_t routermac;
1558 
1559 			(void) ibd_get_allroutergroup(state, mac, &routermac);
1560 			ptr = ibd_acache_find(state, &routermac, B_TRUE,
1561 			    numwqe);
1562 		}
1563 		state->id_ah_op = IBD_OP_NOTSTARTED;
1564 	} else if ((state->id_ah_op != IBD_OP_ONGOING) &&
1565 	    (bcmp(&state->id_ah_addr, mac, IPOIB_ADDRL) != 0)) {
1566 		/*
1567 		 * This case can happen when we get a higher band
1568 		 * packet. The easiest way is to reset the state machine
1569 		 * to accommodate the higher priority packet.
1570 		 */
1571 		state->id_ah_op = IBD_OP_NOTSTARTED;
1572 	}
1573 	mutex_exit(&state->id_ac_mutex);
1574 
1575 	return (ptr);
1576 }
1577 
1578 /*
1579  * Grab a not-currently-in-use AH/PathRecord from the active
1580  * list to recycle to a new destination. Only the async thread
1581  * executes this code.
1582  */
1583 static ibd_ace_t *
ibd_acache_get_unref(ibd_state_t * state)1584 ibd_acache_get_unref(ibd_state_t *state)
1585 {
1586 	ibd_ace_t *ptr = list_tail(&state->id_ah_active);
1587 	boolean_t try_rc_chan_recycle = B_FALSE;
1588 
1589 	ASSERT(mutex_owned(&state->id_ac_mutex));
1590 
1591 	/*
1592 	 * Do plain linear search.
1593 	 */
1594 	while (ptr != NULL) {
1595 		/*
1596 		 * Note that it is possible that the "cycle" bit
1597 		 * is set on the AH w/o any reference count. The
1598 		 * mcg must have been deleted, and the tx cleanup
1599 		 * just decremented the reference count to 0, but
1600 		 * hasn't gotten around to grabbing the id_ac_mutex
1601 		 * to move the AH into the free list.
1602 		 */
1603 		if (GET_REF(ptr) == 0) {
1604 			if (ptr->ac_chan != NULL) {
1605 				ASSERT(state->id_enable_rc == B_TRUE);
1606 				if (!try_rc_chan_recycle) {
1607 					try_rc_chan_recycle = B_TRUE;
1608 					ibd_rc_signal_ace_recycle(state, ptr);
1609 				}
1610 			} else {
1611 				IBD_ACACHE_PULLOUT_ACTIVE(state, ptr);
1612 				break;
1613 			}
1614 		}
1615 		ptr = list_prev(&state->id_ah_active, ptr);
1616 	}
1617 	return (ptr);
1618 }
1619 
1620 /*
1621  * Invoked to clean up AH from active list in case of multicast
1622  * disable and to handle sendonly memberships during mcg traps.
1623  * And for port up processing for multicast and unicast AHs.
1624  * Normally, the AH is taken off the active list, and put into
1625  * the free list to be recycled for a new destination. In case
1626  * Tx requests on the AH have not completed yet, the AH is marked
1627  * for reaping (which will put the AH on the free list) once the Tx's
1628  * complete; in this case, depending on the "force" input, we take
1629  * out the AH from the active list right now, or leave it also for
1630  * the reap operation. Returns TRUE if the AH is taken off the active
1631  * list (and either put into the free list right now, or arranged for
1632  * later), FALSE otherwise.
1633  */
1634 boolean_t
ibd_acache_recycle(ibd_state_t * state,ipoib_mac_t * acmac,boolean_t force)1635 ibd_acache_recycle(ibd_state_t *state, ipoib_mac_t *acmac, boolean_t force)
1636 {
1637 	ibd_ace_t *acactive;
1638 	boolean_t ret = B_TRUE;
1639 
1640 	ASSERT(mutex_owned(&state->id_ac_mutex));
1641 
1642 	if ((acactive = ibd_acache_find(state, acmac, B_FALSE, 0)) != NULL) {
1643 
1644 		/*
1645 		 * Note that the AH might already have the cycle bit set
1646 		 * on it; this might happen if sequences of multicast
1647 		 * enables and disables are coming so fast, that posted
1648 		 * Tx's to the mcg have not completed yet, and the cycle
1649 		 * bit is set successively by each multicast disable.
1650 		 */
1651 		if (SET_CYCLE_IF_REF(acactive)) {
1652 			if (!force) {
1653 				/*
1654 				 * The ace is kept on the active list, further
1655 				 * Tx's can still grab a reference on it; the
1656 				 * ace is reaped when all pending Tx's
1657 				 * referencing the AH complete.
1658 				 */
1659 				ret = B_FALSE;
1660 			} else {
1661 				/*
1662 				 * In the mcg trap case, we always pull the
1663 				 * AH from the active list. And also the port
1664 				 * up multi/unicast case.
1665 				 */
1666 				ASSERT(acactive->ac_chan == NULL);
1667 				IBD_ACACHE_PULLOUT_ACTIVE(state, acactive);
1668 				acactive->ac_mce = NULL;
1669 			}
1670 		} else {
1671 			/*
1672 			 * Determined the ref count is 0, thus reclaim
1673 			 * immediately after pulling out the ace from
1674 			 * the active list.
1675 			 */
1676 			ASSERT(acactive->ac_chan == NULL);
1677 			IBD_ACACHE_PULLOUT_ACTIVE(state, acactive);
1678 			acactive->ac_mce = NULL;
1679 			IBD_ACACHE_INSERT_FREE(state, acactive);
1680 		}
1681 
1682 	}
1683 	return (ret);
1684 }
1685 
1686 /*
1687  * Helper function for async path record lookup. If we are trying to
1688  * Tx to a MCG, check our membership, possibly trying to join the
1689  * group if required. If that fails, try to send the packet to the
1690  * all router group (indicated by the redirect output), pointing
1691  * the input mac address to the router mcg address.
1692  */
1693 static ibd_mce_t *
ibd_async_mcache(ibd_state_t * state,ipoib_mac_t * mac,boolean_t * redirect)1694 ibd_async_mcache(ibd_state_t *state, ipoib_mac_t *mac, boolean_t *redirect)
1695 {
1696 	ib_gid_t mgid;
1697 	ibd_mce_t *mce;
1698 	ipoib_mac_t routermac;
1699 
1700 	*redirect = B_FALSE;
1701 	ibd_n2h_gid(mac, &mgid);
1702 
1703 	/*
1704 	 * Check the FullMember+SendOnlyNonMember list.
1705 	 * Since we are the only one who manipulates the
1706 	 * id_mc_full list, no locks are needed.
1707 	 */
1708 	mce = IBD_MCACHE_FIND_FULL(state, mgid);
1709 	if (mce != NULL) {
1710 		DPRINT(4, "ibd_async_mcache : already joined to group");
1711 		return (mce);
1712 	}
1713 
1714 	/*
1715 	 * Not found; try to join(SendOnlyNonMember) and attach.
1716 	 */
1717 	DPRINT(4, "ibd_async_mcache : not joined to group");
1718 	if ((mce = ibd_join_group(state, mgid, IB_MC_JSTATE_SEND_ONLY_NON)) !=
1719 	    NULL) {
1720 		DPRINT(4, "ibd_async_mcache : nonmem joined to group");
1721 		return (mce);
1722 	}
1723 
1724 	/*
1725 	 * MCGroup not present; try to join the all-router group. If
1726 	 * any of the following steps succeed, we will be redirecting
1727 	 * to the all router group.
1728 	 */
1729 	DPRINT(4, "ibd_async_mcache : nonmem join failed");
1730 	if (!ibd_get_allroutergroup(state, mac, &routermac))
1731 		return (NULL);
1732 	*redirect = B_TRUE;
1733 	ibd_n2h_gid(&routermac, &mgid);
1734 	bcopy(&routermac, mac, IPOIB_ADDRL);
1735 	DPRINT(4, "ibd_async_mcache : router mgid : %016llx:%016llx\n",
1736 	    mgid.gid_prefix, mgid.gid_guid);
1737 
1738 	/*
1739 	 * Are we already joined to the router group?
1740 	 */
1741 	if ((mce = IBD_MCACHE_FIND_FULL(state, mgid)) != NULL) {
1742 		DPRINT(4, "ibd_async_mcache : using already joined router"
1743 		    "group\n");
1744 		return (mce);
1745 	}
1746 
1747 	/*
1748 	 * Can we join(SendOnlyNonMember) the router group?
1749 	 */
1750 	DPRINT(4, "ibd_async_mcache : attempting join to router grp");
1751 	if ((mce = ibd_join_group(state, mgid, IB_MC_JSTATE_SEND_ONLY_NON)) !=
1752 	    NULL) {
1753 		DPRINT(4, "ibd_async_mcache : joined to router grp");
1754 		return (mce);
1755 	}
1756 
1757 	return (NULL);
1758 }
1759 
1760 /*
1761  * Async path record lookup code.
1762  */
1763 static void
ibd_async_acache(ibd_state_t * state,ipoib_mac_t * mac)1764 ibd_async_acache(ibd_state_t *state, ipoib_mac_t *mac)
1765 {
1766 	ibd_ace_t *ce;
1767 	ibd_mce_t *mce = NULL;
1768 	ibt_path_attr_t path_attr;
1769 	ibt_path_info_t path_info;
1770 	ib_gid_t destgid;
1771 	char ret = IBD_OP_NOTSTARTED;
1772 
1773 	DPRINT(4, "ibd_async_acache :  %08X:%08X:%08X:%08X:%08X",
1774 	    htonl(mac->ipoib_qpn), htonl(mac->ipoib_gidpref[0]),
1775 	    htonl(mac->ipoib_gidpref[1]), htonl(mac->ipoib_gidsuff[0]),
1776 	    htonl(mac->ipoib_gidsuff[1]));
1777 
1778 	/*
1779 	 * Check whether we are trying to transmit to a MCG.
1780 	 * In that case, we need to make sure we are a member of
1781 	 * the MCG.
1782 	 */
1783 	if (mac->ipoib_qpn == htonl(IB_MC_QPN)) {
1784 		boolean_t redirected;
1785 
1786 		/*
1787 		 * If we can not find or join the group or even
1788 		 * redirect, error out.
1789 		 */
1790 		if ((mce = ibd_async_mcache(state, mac, &redirected)) ==
1791 		    NULL) {
1792 			state->id_ah_op = IBD_OP_ERRORED;
1793 			return;
1794 		}
1795 
1796 		/*
1797 		 * If we got redirected, we need to determine whether
1798 		 * the AH for the new mcg is in the cache already, and
1799 		 * not pull it in then; otherwise proceed to get the
1800 		 * path for the new mcg. There is no guarantee that
1801 		 * if the AH is currently in the cache, it will still be
1802 		 * there when we look in ibd_acache_lookup(), but that's
1803 		 * okay, we will come back here.
1804 		 */
1805 		if (redirected) {
1806 			ret = IBD_OP_ROUTERED;
1807 			DPRINT(4, "ibd_async_acache :  redirected to "
1808 			    "%08X:%08X:%08X:%08X:%08X",
1809 			    htonl(mac->ipoib_qpn), htonl(mac->ipoib_gidpref[0]),
1810 			    htonl(mac->ipoib_gidpref[1]),
1811 			    htonl(mac->ipoib_gidsuff[0]),
1812 			    htonl(mac->ipoib_gidsuff[1]));
1813 
1814 			mutex_enter(&state->id_ac_mutex);
1815 			if (ibd_acache_find(state, mac, B_FALSE, 0) != NULL) {
1816 				state->id_ah_op = IBD_OP_ROUTERED;
1817 				mutex_exit(&state->id_ac_mutex);
1818 				DPRINT(4, "ibd_async_acache : router AH found");
1819 				return;
1820 			}
1821 			mutex_exit(&state->id_ac_mutex);
1822 		}
1823 	}
1824 
1825 	/*
1826 	 * Get an AH from the free list.
1827 	 */
1828 	mutex_enter(&state->id_ac_mutex);
1829 	if ((ce = IBD_ACACHE_GET_FREE(state)) == NULL) {
1830 		/*
1831 		 * No free ones; try to grab an unreferenced active
1832 		 * one. Maybe we need to make the active list LRU,
1833 		 * but that will create more work for Tx callbacks.
1834 		 * Is there a way of not having to pull out the
1835 		 * entry from the active list, but just indicate it
1836 		 * is being recycled? Yes, but that creates one more
1837 		 * check in the fast lookup path.
1838 		 */
1839 		if ((ce = ibd_acache_get_unref(state)) == NULL) {
1840 			/*
1841 			 * Pretty serious shortage now.
1842 			 */
1843 			state->id_ah_op = IBD_OP_NOTSTARTED;
1844 			mutex_exit(&state->id_ac_mutex);
1845 			DPRINT(10, "ibd_async_acache : failed to find AH "
1846 			    "slot\n");
1847 			return;
1848 		}
1849 		/*
1850 		 * We could check whether ac_mce points to a SendOnly
1851 		 * member and drop that membership now. Or do it lazily
1852 		 * at detach time.
1853 		 */
1854 		ce->ac_mce = NULL;
1855 	}
1856 	mutex_exit(&state->id_ac_mutex);
1857 	ASSERT(ce->ac_mce == NULL);
1858 
1859 	/*
1860 	 * Update the entry.
1861 	 */
1862 	bcopy((char *)mac, &ce->ac_mac, IPOIB_ADDRL);
1863 
1864 	bzero(&path_info, sizeof (path_info));
1865 	bzero(&path_attr, sizeof (ibt_path_attr_t));
1866 	path_attr.pa_sgid = state->id_sgid;
1867 	path_attr.pa_num_dgids = 1;
1868 	ibd_n2h_gid(&ce->ac_mac, &destgid);
1869 	path_attr.pa_dgids = &destgid;
1870 	path_attr.pa_sl = state->id_mcinfo->mc_adds_vect.av_srvl;
1871 	path_attr.pa_pkey = state->id_pkey;
1872 	if (ibt_get_paths(state->id_ibt_hdl, IBT_PATH_PKEY, &path_attr, 1,
1873 	    &path_info, NULL) != IBT_SUCCESS) {
1874 		DPRINT(10, "ibd_async_acache : failed in ibt_get_paths");
1875 		goto error;
1876 	}
1877 	if (ibt_modify_ud_dest(ce->ac_dest, state->id_mcinfo->mc_qkey,
1878 	    ntohl(ce->ac_mac.ipoib_qpn),
1879 	    &path_info.pi_prim_cep_path.cep_adds_vect) != IBT_SUCCESS) {
1880 		DPRINT(10, "ibd_async_acache : failed in ibt_modify_ud_dest");
1881 		goto error;
1882 	}
1883 
1884 	/*
1885 	 * mce is set whenever an AH is being associated with a
1886 	 * MCG; this will come in handy when we leave the MCG. The
1887 	 * lock protects Tx fastpath from scanning the active list.
1888 	 */
1889 	if (mce != NULL)
1890 		ce->ac_mce = mce;
1891 
1892 	/*
1893 	 * initiate a RC mode connection for unicast address
1894 	 */
1895 	if (state->id_enable_rc && (mac->ipoib_qpn != htonl(IB_MC_QPN)) &&
1896 	    (htonl(mac->ipoib_qpn) & IBD_MAC_ADDR_RC)) {
1897 		ASSERT(ce->ac_chan == NULL);
1898 		DPRINT(10, "ibd_async_acache: call "
1899 		    "ibd_rc_try_connect(ace=%p)", ce);
1900 		ibd_rc_try_connect(state, ce, &path_info);
1901 		if (ce->ac_chan == NULL) {
1902 			DPRINT(10, "ibd_async_acache: fail to setup RC"
1903 			    " channel");
1904 			state->rc_conn_fail++;
1905 			goto error;
1906 		}
1907 	}
1908 
1909 	mutex_enter(&state->id_ac_mutex);
1910 	IBD_ACACHE_INSERT_ACTIVE(state, ce);
1911 	state->id_ah_op = ret;
1912 	mutex_exit(&state->id_ac_mutex);
1913 	return;
1914 error:
1915 	/*
1916 	 * We might want to drop SendOnly membership here if we
1917 	 * joined above. The lock protects Tx callbacks inserting
1918 	 * into the free list.
1919 	 */
1920 	mutex_enter(&state->id_ac_mutex);
1921 	state->id_ah_op = IBD_OP_ERRORED;
1922 	IBD_ACACHE_INSERT_FREE(state, ce);
1923 	mutex_exit(&state->id_ac_mutex);
1924 }
1925 
1926 /*
1927  * While restoring port's presence on the subnet on a port up, it is possible
1928  * that the port goes down again.
1929  */
1930 static void
ibd_async_link(ibd_state_t * state,ibd_req_t * req)1931 ibd_async_link(ibd_state_t *state, ibd_req_t *req)
1932 {
1933 	ibd_link_op_t opcode = (ibd_link_op_t)req->rq_ptr;
1934 	link_state_t lstate = (opcode == IBD_LINK_DOWN) ? LINK_STATE_DOWN :
1935 	    LINK_STATE_UP;
1936 	ibd_mce_t *mce, *pmce;
1937 	ibd_ace_t *ace, *pace;
1938 
1939 	DPRINT(10, "ibd_async_link(): %d", opcode);
1940 
1941 	/*
1942 	 * On a link up, revalidate the link speed/width. No point doing
1943 	 * this on a link down, since we will be unable to do SA operations,
1944 	 * defaulting to the lowest speed. Also notice that we update our
1945 	 * notion of speed before calling mac_link_update(), which will do
1946 	 * necessary higher level notifications for speed changes.
1947 	 */
1948 	if ((opcode == IBD_LINK_UP_ABSENT) || (opcode == IBD_LINK_UP)) {
1949 		_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*state))
1950 		state->id_link_speed = ibd_get_portspeed(state);
1951 		_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*state))
1952 	}
1953 
1954 	/*
1955 	 * Do all the work required to establish our presence on
1956 	 * the subnet.
1957 	 */
1958 	if (opcode == IBD_LINK_UP_ABSENT) {
1959 		/*
1960 		 * If in promiscuous mode ...
1961 		 */
1962 		if (state->id_prom_op == IBD_OP_COMPLETED) {
1963 			/*
1964 			 * Drop all nonmembership.
1965 			 */
1966 			ibd_async_unsetprom(state);
1967 
1968 			/*
1969 			 * Then, try to regain nonmembership to all mcg's.
1970 			 */
1971 			ibd_async_setprom(state);
1972 
1973 		}
1974 
1975 		/*
1976 		 * Drop all sendonly membership (which also gets rid of the
1977 		 * AHs); try to reacquire all full membership.
1978 		 */
1979 		mce = list_head(&state->id_mc_full);
1980 		while ((pmce = mce) != NULL) {
1981 			mce = list_next(&state->id_mc_full, mce);
1982 			if (pmce->mc_jstate == IB_MC_JSTATE_SEND_ONLY_NON)
1983 				ibd_leave_group(state,
1984 				    pmce->mc_info.mc_adds_vect.av_dgid,
1985 				    IB_MC_JSTATE_SEND_ONLY_NON);
1986 			else
1987 				ibd_reacquire_group(state, pmce);
1988 		}
1989 
1990 		/*
1991 		 * Recycle all active AHs to free list (and if there are
1992 		 * pending posts, make sure they will go into the free list
1993 		 * once the Tx's complete). Grab the lock to prevent
1994 		 * concurrent Tx's as well as Tx cleanups.
1995 		 */
1996 		mutex_enter(&state->id_ac_mutex);
1997 		ace = list_head(&state->id_ah_active);
1998 		while ((pace = ace) != NULL) {
1999 			boolean_t cycled;
2000 
2001 			ace = list_next(&state->id_ah_active, ace);
2002 			mce = pace->ac_mce;
2003 			if (pace->ac_chan != NULL) {
2004 				ASSERT(mce == NULL);
2005 				ASSERT(state->id_enable_rc == B_TRUE);
2006 				if (pace->ac_chan->chan_state ==
2007 				    IBD_RC_STATE_ACT_ESTAB) {
2008 					INC_REF(pace, 1);
2009 					IBD_ACACHE_PULLOUT_ACTIVE(state, pace);
2010 					pace->ac_chan->chan_state =
2011 					    IBD_RC_STATE_ACT_CLOSING;
2012 					ibd_rc_signal_act_close(state, pace);
2013 				} else {
2014 					state->rc_act_close_simultaneous++;
2015 					DPRINT(40, "ibd_async_link: other "
2016 					    "thread is closing it, ace=%p, "
2017 					    "ac_chan=%p, chan_state=%d",
2018 					    pace, pace->ac_chan,
2019 					    pace->ac_chan->chan_state);
2020 				}
2021 			} else {
2022 				cycled = ibd_acache_recycle(state,
2023 				    &pace->ac_mac, B_TRUE);
2024 			}
2025 			/*
2026 			 * If this is for an mcg, it must be for a fullmember,
2027 			 * since we got rid of send-only members above when
2028 			 * processing the mce list.
2029 			 */
2030 			ASSERT(cycled && ((mce == NULL) || (mce->mc_jstate ==
2031 			    IB_MC_JSTATE_FULL)));
2032 
2033 			/*
2034 			 * Check if the fullmember mce needs to be torn down,
2035 			 * ie whether the DLPI disable has already been done.
2036 			 * If so, do some of the work of tx_cleanup, namely
2037 			 * causing leave (which will fail), detach and
2038 			 * mce-freeing. tx_cleanup will put the AH into free
2039 			 * list. The reason to duplicate some of this
2040 			 * tx_cleanup work is because we want to delete the
2041 			 * AH right now instead of waiting for tx_cleanup, to
2042 			 * force subsequent Tx's to reacquire an AH.
2043 			 */
2044 			if ((mce != NULL) && (mce->mc_fullreap))
2045 				ibd_async_reap_group(state, mce,
2046 				    mce->mc_info.mc_adds_vect.av_dgid,
2047 				    mce->mc_jstate);
2048 		}
2049 		mutex_exit(&state->id_ac_mutex);
2050 	}
2051 
2052 	/*
2053 	 * mac handle is guaranteed to exist since driver does ibt_close_hca()
2054 	 * (which stops further events from being delivered) before
2055 	 * mac_unregister(). At this point, it is guaranteed that mac_register
2056 	 * has already been done.
2057 	 */
2058 	mutex_enter(&state->id_link_mutex);
2059 	state->id_link_state = lstate;
2060 	mac_link_update(state->id_mh, lstate);
2061 	mutex_exit(&state->id_link_mutex);
2062 
2063 	ibd_async_done(state);
2064 }
2065 
2066 /*
2067  * Check the pkey table to see if we can find the pkey we're looking for.
2068  * Set the pkey index in 'pkix' if found. Return 0 on success and -1 on
2069  * failure.
2070  */
2071 static int
ibd_locate_pkey(ib_pkey_t * pkey_tbl,uint16_t pkey_tbl_sz,ib_pkey_t pkey,uint16_t * pkix)2072 ibd_locate_pkey(ib_pkey_t *pkey_tbl, uint16_t pkey_tbl_sz, ib_pkey_t pkey,
2073     uint16_t *pkix)
2074 {
2075 	uint16_t ndx;
2076 
2077 	ASSERT(pkix != NULL);
2078 
2079 	for (ndx = 0; ndx < pkey_tbl_sz; ndx++) {
2080 		if (pkey_tbl[ndx] == pkey) {
2081 			*pkix = ndx;
2082 			return (0);
2083 		}
2084 	}
2085 	return (-1);
2086 }
2087 
2088 /*
2089  * Late HCA Initialization:
2090  * If plumb had succeeded without the availability of an active port or the
2091  * pkey, and either of their availability is now being indicated via PORT_UP
2092  * or PORT_CHANGE respectively, try a start of the interface.
2093  *
2094  * Normal Operation:
2095  * When the link is notified up, we need to do a few things, based
2096  * on the port's current p_init_type_reply claiming a reinit has been
2097  * done or not. The reinit steps are:
2098  * 1. If in InitTypeReply, NoLoadReply == PreserveContentReply == 0, verify
2099  *    the old Pkey and GID0 are correct.
2100  * 2. Register for mcg traps (already done by ibmf).
2101  * 3. If PreservePresenceReply indicates the SM has restored port's presence
2102  *    in subnet, nothing more to do. Else go to next steps (on async daemon).
2103  * 4. Give up all sendonly memberships.
2104  * 5. Acquire all full memberships.
2105  * 6. In promiscuous mode, acquire all non memberships.
2106  * 7. Recycle all AHs to free list.
2107  */
2108 static void
ibd_link_mod(ibd_state_t * state,ibt_async_code_t code)2109 ibd_link_mod(ibd_state_t *state, ibt_async_code_t code)
2110 {
2111 	ibt_hca_portinfo_t *port_infop = NULL;
2112 	ibt_status_t ibt_status;
2113 	uint_t psize, port_infosz;
2114 	ibd_link_op_t opcode;
2115 	ibd_req_t *req;
2116 	link_state_t new_link_state = LINK_STATE_UP;
2117 	uint8_t itreply;
2118 	uint16_t pkix;
2119 	int ret;
2120 
2121 	/*
2122 	 * Let's not race with a plumb or an unplumb; if we detect a
2123 	 * pkey relocation event later on here, we may have to restart.
2124 	 */
2125 	ibd_set_mac_progress(state, IBD_DRV_RESTART_IN_PROGRESS);
2126 
2127 	mutex_enter(&state->id_link_mutex);
2128 
2129 	/*
2130 	 * If the link state is unknown, a plumb has not yet been attempted
2131 	 * on the interface. Nothing to do.
2132 	 */
2133 	if (state->id_link_state == LINK_STATE_UNKNOWN) {
2134 		mutex_exit(&state->id_link_mutex);
2135 		goto link_mod_return;
2136 	}
2137 
2138 	/*
2139 	 * If link state is down because of plumb failure, and we are not in
2140 	 * late HCA init, and we were not successfully plumbed, nothing to do.
2141 	 */
2142 	if ((state->id_link_state == LINK_STATE_DOWN) &&
2143 	    ((state->id_mac_state & IBD_DRV_IN_LATE_HCA_INIT) == 0) &&
2144 	    ((state->id_mac_state & IBD_DRV_STARTED) == 0)) {
2145 		mutex_exit(&state->id_link_mutex);
2146 		goto link_mod_return;
2147 	}
2148 
2149 	/*
2150 	 * If this routine was called in response to a port down event,
2151 	 * we just need to see if this should be informed.
2152 	 */
2153 	if (code == IBT_ERROR_PORT_DOWN) {
2154 		new_link_state = LINK_STATE_DOWN;
2155 		goto update_link_state;
2156 	}
2157 
2158 	/*
2159 	 * If it's not a port down event we've received, try to get the port
2160 	 * attributes first. If we fail here, the port is as good as down.
2161 	 * Otherwise, if the link went down by the time the handler gets
2162 	 * here, give up - we cannot even validate the pkey/gid since those
2163 	 * are not valid and this is as bad as a port down anyway.
2164 	 */
2165 	ibt_status = ibt_query_hca_ports(state->id_hca_hdl, state->id_port,
2166 	    &port_infop, &psize, &port_infosz);
2167 	if ((ibt_status != IBT_SUCCESS) || (psize != 1) ||
2168 	    (port_infop->p_linkstate != IBT_PORT_ACTIVE)) {
2169 		new_link_state = LINK_STATE_DOWN;
2170 		goto update_link_state;
2171 	}
2172 
2173 	/*
2174 	 * If in the previous attempt, the pkey was not found either due to the
2175 	 * port state being down, or due to it's absence in the pkey table,
2176 	 * look for it now and try to start the interface.
2177 	 */
2178 	if (state->id_mac_state & IBD_DRV_IN_LATE_HCA_INIT) {
2179 		mutex_exit(&state->id_link_mutex);
2180 		if ((ret = ibd_start(state)) != 0) {
2181 			DPRINT(10, "ibd_linkmod: cannot start from late HCA "
2182 			    "init, ret=%d", ret);
2183 		}
2184 		ibt_free_portinfo(port_infop, port_infosz);
2185 		goto link_mod_return;
2186 	}
2187 
2188 	/*
2189 	 * Check the SM InitTypeReply flags. If both NoLoadReply and
2190 	 * PreserveContentReply are 0, we don't know anything about the
2191 	 * data loaded into the port attributes, so we need to verify
2192 	 * if gid0 and pkey are still valid.
2193 	 */
2194 	itreply = port_infop->p_init_type_reply;
2195 	if (((itreply & SM_INIT_TYPE_REPLY_NO_LOAD_REPLY) == 0) &&
2196 	    ((itreply & SM_INIT_TYPE_PRESERVE_CONTENT_REPLY) == 0)) {
2197 		/*
2198 		 * Check to see if the subnet part of GID0 has changed. If
2199 		 * not, check the simple case first to see if the pkey
2200 		 * index is the same as before; finally check to see if the
2201 		 * pkey has been relocated to a different index in the table.
2202 		 */
2203 		_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(state->id_sgid))
2204 		if (bcmp(port_infop->p_sgid_tbl,
2205 		    &state->id_sgid, sizeof (ib_gid_t)) != 0) {
2206 
2207 			new_link_state = LINK_STATE_DOWN;
2208 
2209 		} else if (port_infop->p_pkey_tbl[state->id_pkix] ==
2210 		    state->id_pkey) {
2211 
2212 			new_link_state = LINK_STATE_UP;
2213 
2214 		} else if (ibd_locate_pkey(port_infop->p_pkey_tbl,
2215 		    port_infop->p_pkey_tbl_sz, state->id_pkey, &pkix) == 0) {
2216 
2217 			ibt_free_portinfo(port_infop, port_infosz);
2218 			mutex_exit(&state->id_link_mutex);
2219 
2220 			/*
2221 			 * Currently a restart is required if our pkey has moved
2222 			 * in the pkey table. If we get the ibt_recycle_ud() to
2223 			 * work as documented (expected), we may be able to
2224 			 * avoid a complete restart.  Note that we've already
2225 			 * marked both the start and stop 'in-progress' flags,
2226 			 * so it is ok to go ahead and do this restart.
2227 			 */
2228 			(void) ibd_undo_start(state, LINK_STATE_DOWN);
2229 			if ((ret = ibd_start(state)) != 0) {
2230 				DPRINT(10, "ibd_restart: cannot restart, "
2231 				    "ret=%d", ret);
2232 			}
2233 
2234 			goto link_mod_return;
2235 		} else {
2236 			new_link_state = LINK_STATE_DOWN;
2237 		}
2238 		_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(state->id_sgid))
2239 	}
2240 
2241 update_link_state:
2242 	if (port_infop) {
2243 		ibt_free_portinfo(port_infop, port_infosz);
2244 	}
2245 
2246 	/*
2247 	 * If we're reporting a link up, check InitTypeReply to see if
2248 	 * the SM has ensured that the port's presence in mcg, traps,
2249 	 * etc. is intact.
2250 	 */
2251 	if (new_link_state == LINK_STATE_DOWN) {
2252 		opcode = IBD_LINK_DOWN;
2253 	} else {
2254 		if ((itreply & SM_INIT_TYPE_PRESERVE_PRESENCE_REPLY) ==
2255 		    SM_INIT_TYPE_PRESERVE_PRESENCE_REPLY) {
2256 			opcode = IBD_LINK_UP;
2257 		} else {
2258 			opcode = IBD_LINK_UP_ABSENT;
2259 		}
2260 	}
2261 
2262 	/*
2263 	 * If the old state is the same as the new state, and the SM indicated
2264 	 * no change in the port parameters, nothing to do.
2265 	 */
2266 	if ((state->id_link_state == new_link_state) && (opcode !=
2267 	    IBD_LINK_UP_ABSENT)) {
2268 		mutex_exit(&state->id_link_mutex);
2269 		goto link_mod_return;
2270 	}
2271 
2272 	/*
2273 	 * Ok, so there was a link state change; see if it's safe to ask
2274 	 * the async thread to do the work
2275 	 */
2276 	if (!ibd_async_safe(state)) {
2277 		state->id_link_state = new_link_state;
2278 		mutex_exit(&state->id_link_mutex);
2279 		goto link_mod_return;
2280 	}
2281 
2282 	mutex_exit(&state->id_link_mutex);
2283 
2284 	/*
2285 	 * Queue up a request for ibd_async_link() to handle this link
2286 	 * state change event
2287 	 */
2288 	req = kmem_cache_alloc(state->id_req_kmc, KM_SLEEP);
2289 	req->rq_ptr = (void *)opcode;
2290 	ibd_queue_work_slot(state, req, IBD_ASYNC_LINK);
2291 
2292 link_mod_return:
2293 	ibd_clr_mac_progress(state, IBD_DRV_RESTART_IN_PROGRESS);
2294 }
2295 
2296 /*
2297  * For the port up/down events, IBTL guarantees there will not be concurrent
2298  * invocations of the handler. IBTL might coalesce link transition events,
2299  * and not invoke the handler for _each_ up/down transition, but it will
2300  * invoke the handler with last known state
2301  */
2302 static void
ibd_async_handler(void * clnt_private,ibt_hca_hdl_t hca_hdl,ibt_async_code_t code,ibt_async_event_t * event)2303 ibd_async_handler(void *clnt_private, ibt_hca_hdl_t hca_hdl,
2304     ibt_async_code_t code, ibt_async_event_t *event)
2305 {
2306 	ibd_state_t *state = (ibd_state_t *)clnt_private;
2307 
2308 	switch (code) {
2309 	case IBT_ERROR_CATASTROPHIC_CHAN:
2310 		ibd_print_warn(state, "catastrophic channel error");
2311 		break;
2312 	case IBT_ERROR_CQ:
2313 		ibd_print_warn(state, "completion queue error");
2314 		break;
2315 	case IBT_PORT_CHANGE_EVENT:
2316 		/*
2317 		 * Events will be delivered to all instances that have
2318 		 * done ibt_open_hca() but not yet done ibt_close_hca().
2319 		 * Only need to do work for our port; IBTF will deliver
2320 		 * events for other ports on the hca we have ibt_open_hca'ed
2321 		 * too. Note that id_port is initialized in ibd_attach()
2322 		 * before we do an ibt_open_hca() in ibd_attach().
2323 		 */
2324 		ASSERT(state->id_hca_hdl == hca_hdl);
2325 		if (state->id_port != event->ev_port)
2326 			break;
2327 
2328 		if ((event->ev_port_flags & IBT_PORT_CHANGE_PKEY) ==
2329 		    IBT_PORT_CHANGE_PKEY) {
2330 			ibd_link_mod(state, code);
2331 		}
2332 		break;
2333 	case IBT_ERROR_PORT_DOWN:
2334 	case IBT_CLNT_REREG_EVENT:
2335 	case IBT_EVENT_PORT_UP:
2336 		/*
2337 		 * Events will be delivered to all instances that have
2338 		 * done ibt_open_hca() but not yet done ibt_close_hca().
2339 		 * Only need to do work for our port; IBTF will deliver
2340 		 * events for other ports on the hca we have ibt_open_hca'ed
2341 		 * too. Note that id_port is initialized in ibd_attach()
2342 		 * before we do an ibt_open_hca() in ibd_attach().
2343 		 */
2344 		ASSERT(state->id_hca_hdl == hca_hdl);
2345 		if (state->id_port != event->ev_port)
2346 			break;
2347 
2348 		ibd_link_mod(state, code);
2349 		break;
2350 
2351 	case IBT_HCA_ATTACH_EVENT:
2352 	case IBT_HCA_DETACH_EVENT:
2353 		/*
2354 		 * When a new card is plugged to the system, attach_event is
2355 		 * invoked. Additionally, a cfgadm needs to be run to make the
2356 		 * card known to the system, and an ifconfig needs to be run to
2357 		 * plumb up any ibd interfaces on the card. In the case of card
2358 		 * unplug, a cfgadm is run that will trigger any RCM scripts to
2359 		 * unplumb the ibd interfaces on the card; when the card is
2360 		 * actually unplugged, the detach_event is invoked;
2361 		 * additionally, if any ibd instances are still active on the
2362 		 * card (eg there were no associated RCM scripts), driver's
2363 		 * detach routine is invoked.
2364 		 */
2365 		break;
2366 	default:
2367 		break;
2368 	}
2369 }
2370 
2371 static int
ibd_register_mac(ibd_state_t * state,dev_info_t * dip)2372 ibd_register_mac(ibd_state_t *state, dev_info_t *dip)
2373 {
2374 	mac_register_t *macp;
2375 	int ret;
2376 
2377 	if ((macp = mac_alloc(MAC_VERSION)) == NULL) {
2378 		DPRINT(10, "ibd_register_mac: mac_alloc() failed");
2379 		return (DDI_FAILURE);
2380 	}
2381 
2382 	/*
2383 	 * Note that when we register with mac during attach, we don't
2384 	 * have the id_macaddr yet, so we'll simply be registering a
2385 	 * zero macaddr that we'll overwrite later during plumb (in
2386 	 * ibd_m_start()). Similar is the case with id_mtu - we'll
2387 	 * update the mac layer with the correct mtu during plumb.
2388 	 */
2389 	macp->m_type_ident = MAC_PLUGIN_IDENT_IB;
2390 	macp->m_driver = state;
2391 	macp->m_dip = dip;
2392 	macp->m_src_addr = (uint8_t *)&state->id_macaddr;
2393 	macp->m_callbacks = &ibd_m_callbacks;
2394 	macp->m_min_sdu = 0;
2395 	macp->m_multicast_sdu = IBD_DEF_MAX_SDU;
2396 	if (state->id_type == IBD_PORT_DRIVER) {
2397 		macp->m_max_sdu = IBD_DEF_RC_MAX_SDU;
2398 	} else if (state->id_enable_rc) {
2399 		macp->m_max_sdu = state->rc_mtu - IPOIB_HDRSIZE;
2400 	} else {
2401 		macp->m_max_sdu = IBD_DEF_MAX_SDU;
2402 	}
2403 	macp->m_priv_props = ibd_priv_props;
2404 
2405 	/*
2406 	 *  Register ourselves with the GLDv3 interface
2407 	 */
2408 	if ((ret = mac_register(macp, &state->id_mh)) != 0) {
2409 		mac_free(macp);
2410 		DPRINT(10,
2411 		    "ibd_register_mac: mac_register() failed, ret=%d", ret);
2412 		return (DDI_FAILURE);
2413 	}
2414 
2415 	mac_free(macp);
2416 	return (DDI_SUCCESS);
2417 }
2418 
2419 static int
ibd_record_capab(ibd_state_t * state)2420 ibd_record_capab(ibd_state_t *state)
2421 {
2422 	ibt_hca_attr_t hca_attrs;
2423 	ibt_status_t ibt_status;
2424 
2425 	_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*state))
2426 
2427 	/*
2428 	 * Query the HCA and fetch its attributes
2429 	 */
2430 	ibt_status = ibt_query_hca(state->id_hca_hdl, &hca_attrs);
2431 	ASSERT(ibt_status == IBT_SUCCESS);
2432 
2433 	/*
2434 	 * 1. Set the Hardware Checksum capability. Currently we only consider
2435 	 *    full checksum offload.
2436 	 */
2437 	if (state->id_enable_rc) {
2438 			state->id_hwcksum_capab = 0;
2439 	} else {
2440 		if ((hca_attrs.hca_flags & IBT_HCA_CKSUM_FULL)
2441 		    == IBT_HCA_CKSUM_FULL) {
2442 			state->id_hwcksum_capab = IBT_HCA_CKSUM_FULL;
2443 		}
2444 	}
2445 
2446 	/*
2447 	 * 2. Set LSO policy, capability and maximum length
2448 	 */
2449 	if (state->id_enable_rc) {
2450 		state->id_lso_capable = B_FALSE;
2451 		state->id_lso_maxlen = 0;
2452 	} else {
2453 		if (hca_attrs.hca_max_lso_size > 0) {
2454 			state->id_lso_capable = B_TRUE;
2455 			if (hca_attrs.hca_max_lso_size > IBD_LSO_MAXLEN)
2456 				state->id_lso_maxlen = IBD_LSO_MAXLEN;
2457 			else
2458 				state->id_lso_maxlen =
2459 				    hca_attrs.hca_max_lso_size;
2460 		} else {
2461 			state->id_lso_capable = B_FALSE;
2462 			state->id_lso_maxlen = 0;
2463 		}
2464 	}
2465 
2466 	/*
2467 	 * 3. Set Reserved L_Key capability
2468 	 */
2469 	if ((hca_attrs.hca_flags2 & IBT_HCA2_RES_LKEY) == IBT_HCA2_RES_LKEY) {
2470 		state->id_hca_res_lkey_capab = 1;
2471 		state->id_res_lkey = hca_attrs.hca_reserved_lkey;
2472 		state->rc_enable_iov_map = B_TRUE;
2473 	} else {
2474 		/* If no reserved lkey, we will not use ibt_map_mem_iov */
2475 		state->rc_enable_iov_map = B_FALSE;
2476 	}
2477 
2478 	/*
2479 	 * 4. Set maximum sqseg value after checking to see if extended sgl
2480 	 *    size information is provided by the hca
2481 	 */
2482 	if (hca_attrs.hca_flags & IBT_HCA_WQE_SIZE_INFO) {
2483 		state->id_max_sqseg = hca_attrs.hca_ud_send_sgl_sz;
2484 		state->rc_tx_max_sqseg = hca_attrs.hca_conn_send_sgl_sz;
2485 	} else {
2486 		state->id_max_sqseg = hca_attrs.hca_max_sgl;
2487 		state->rc_tx_max_sqseg = hca_attrs.hca_max_sgl;
2488 	}
2489 	if (state->id_max_sqseg > IBD_MAX_SQSEG) {
2490 		state->id_max_sqseg = IBD_MAX_SQSEG;
2491 	} else if (state->id_max_sqseg < IBD_MAX_SQSEG) {
2492 		ibd_print_warn(state, "Set #sgl = %d instead of default %d",
2493 		    state->id_max_sqseg, IBD_MAX_SQSEG);
2494 	}
2495 	if (state->rc_tx_max_sqseg > IBD_MAX_SQSEG) {
2496 		state->rc_tx_max_sqseg = IBD_MAX_SQSEG;
2497 	} else if (state->rc_tx_max_sqseg < IBD_MAX_SQSEG) {
2498 		ibd_print_warn(state, "RC mode: Set #sgl = %d instead of "
2499 		    "default %d", state->rc_tx_max_sqseg, IBD_MAX_SQSEG);
2500 	}
2501 
2502 	/*
2503 	 * Translating the virtual address regions into physical regions
2504 	 * for using the Reserved LKey feature results in a wr sgl that
2505 	 * is a little longer. Since failing ibt_map_mem_iov() is costly,
2506 	 * we'll fix a high-water mark (65%) for when we should stop.
2507 	 */
2508 	state->id_max_sqseg_hiwm = (state->id_max_sqseg * 65) / 100;
2509 	state->rc_max_sqseg_hiwm = (state->rc_tx_max_sqseg * 65) / 100;
2510 
2511 	/*
2512 	 * 5. Set number of recv and send wqes after checking hca maximum
2513 	 *    channel size. Store the max channel size in the state so that it
2514 	 *    can be referred to when the swqe/rwqe change is requested via
2515 	 *    dladm.
2516 	 */
2517 
2518 	state->id_hca_max_chan_sz = hca_attrs.hca_max_chan_sz;
2519 
2520 	if (hca_attrs.hca_max_chan_sz < state->id_ud_num_rwqe)
2521 		state->id_ud_num_rwqe = hca_attrs.hca_max_chan_sz;
2522 
2523 	state->id_rx_bufs_outstanding_limit = state->id_ud_num_rwqe -
2524 	    IBD_RWQE_MIN;
2525 
2526 	if (hca_attrs.hca_max_chan_sz < state->id_ud_num_swqe)
2527 		state->id_ud_num_swqe = hca_attrs.hca_max_chan_sz;
2528 
2529 	_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*state))
2530 
2531 	return (DDI_SUCCESS);
2532 }
2533 
2534 static int
ibd_part_busy(ibd_state_t * state)2535 ibd_part_busy(ibd_state_t *state)
2536 {
2537 	if (atomic_add_32_nv(&state->id_rx_list.dl_bufs_outstanding, 0) != 0) {
2538 		DPRINT(10, "ibd_part_busy: failed: rx bufs outstanding\n");
2539 		return (DDI_FAILURE);
2540 	}
2541 
2542 	if (state->rc_srq_rwqe_list.dl_bufs_outstanding != 0) {
2543 		DPRINT(10, "ibd_part_busy: failed: srq bufs outstanding\n");
2544 		return (DDI_FAILURE);
2545 	}
2546 
2547 	/*
2548 	 * "state->id_ah_op == IBD_OP_ONGOING" means this IPoIB port is
2549 	 * connecting to a remote IPoIB port. We can't remove this port.
2550 	 */
2551 	if (state->id_ah_op == IBD_OP_ONGOING) {
2552 		DPRINT(10, "ibd_part_busy: failed: connecting\n");
2553 		return (DDI_FAILURE);
2554 	}
2555 
2556 	return (DDI_SUCCESS);
2557 }
2558 
2559 
2560 static void
ibd_part_unattach(ibd_state_t * state)2561 ibd_part_unattach(ibd_state_t *state)
2562 {
2563 	uint32_t progress = state->id_mac_state;
2564 	ibt_status_t ret;
2565 
2566 	/* make sure rx resources are freed */
2567 	ibd_free_rx_rsrcs(state);
2568 
2569 	if (progress & IBD_DRV_RC_SRQ_ALLOCD) {
2570 		ASSERT(state->id_enable_rc);
2571 		ibd_rc_fini_srq_list(state);
2572 		state->id_mac_state &= (~IBD_DRV_RC_SRQ_ALLOCD);
2573 	}
2574 
2575 	if (progress & IBD_DRV_MAC_REGISTERED) {
2576 		(void) mac_unregister(state->id_mh);
2577 		state->id_mac_state &= (~IBD_DRV_MAC_REGISTERED);
2578 	}
2579 
2580 	if (progress & IBD_DRV_ASYNC_THR_CREATED) {
2581 		/*
2582 		 * No new async requests will be posted since the device
2583 		 * link state has been marked as unknown; completion handlers
2584 		 * have been turned off, so Tx handler will not cause any
2585 		 * more IBD_ASYNC_REAP requests.
2586 		 *
2587 		 * Queue a request for the async thread to exit, which will
2588 		 * be serviced after any pending ones. This can take a while,
2589 		 * specially if the SM is unreachable, since IBMF will slowly
2590 		 * timeout each SM request issued by the async thread.  Reap
2591 		 * the thread before continuing on, we do not want it to be
2592 		 * lingering in modunloaded code.
2593 		 */
2594 		ibd_queue_work_slot(state, &state->id_ah_req, IBD_ASYNC_EXIT);
2595 		thread_join(state->id_async_thrid);
2596 
2597 		state->id_mac_state &= (~IBD_DRV_ASYNC_THR_CREATED);
2598 	}
2599 
2600 	if (progress & IBD_DRV_REQ_LIST_INITED) {
2601 		list_destroy(&state->id_req_list);
2602 		mutex_destroy(&state->id_acache_req_lock);
2603 		cv_destroy(&state->id_acache_req_cv);
2604 		state->id_mac_state &= ~IBD_DRV_REQ_LIST_INITED;
2605 	}
2606 
2607 	if (progress & IBD_DRV_PD_ALLOCD) {
2608 		if ((ret = ibt_free_pd(state->id_hca_hdl,
2609 		    state->id_pd_hdl)) != IBT_SUCCESS) {
2610 			ibd_print_warn(state, "failed to free "
2611 			    "protection domain, ret=%d", ret);
2612 		}
2613 		state->id_pd_hdl = NULL;
2614 		state->id_mac_state &= (~IBD_DRV_PD_ALLOCD);
2615 	}
2616 
2617 	if (progress & IBD_DRV_HCA_OPENED) {
2618 		if ((ret = ibt_close_hca(state->id_hca_hdl)) !=
2619 		    IBT_SUCCESS) {
2620 			ibd_print_warn(state, "failed to close "
2621 			    "HCA device, ret=%d", ret);
2622 		}
2623 		state->id_hca_hdl = NULL;
2624 		state->id_mac_state &= (~IBD_DRV_HCA_OPENED);
2625 	}
2626 
2627 	mutex_enter(&ibd_gstate.ig_mutex);
2628 	if (progress & IBD_DRV_IBTL_ATTACH_DONE) {
2629 		if ((ret = ibt_detach(state->id_ibt_hdl)) !=
2630 		    IBT_SUCCESS) {
2631 			ibd_print_warn(state,
2632 			    "ibt_detach() failed, ret=%d", ret);
2633 		}
2634 		state->id_ibt_hdl = NULL;
2635 		state->id_mac_state &= (~IBD_DRV_IBTL_ATTACH_DONE);
2636 		ibd_gstate.ig_ibt_hdl_ref_cnt--;
2637 	}
2638 	if ((ibd_gstate.ig_ibt_hdl_ref_cnt == 0) &&
2639 	    (ibd_gstate.ig_ibt_hdl != NULL)) {
2640 		if ((ret = ibt_detach(ibd_gstate.ig_ibt_hdl)) !=
2641 		    IBT_SUCCESS) {
2642 			ibd_print_warn(state, "ibt_detach(): global "
2643 			    "failed, ret=%d", ret);
2644 		}
2645 		ibd_gstate.ig_ibt_hdl = NULL;
2646 	}
2647 	mutex_exit(&ibd_gstate.ig_mutex);
2648 
2649 	if (progress & IBD_DRV_TXINTR_ADDED) {
2650 		ddi_remove_softintr(state->id_tx);
2651 		state->id_tx = NULL;
2652 		state->id_mac_state &= (~IBD_DRV_TXINTR_ADDED);
2653 	}
2654 
2655 	if (progress & IBD_DRV_RXINTR_ADDED) {
2656 		ddi_remove_softintr(state->id_rx);
2657 		state->id_rx = NULL;
2658 		state->id_mac_state &= (~IBD_DRV_RXINTR_ADDED);
2659 	}
2660 
2661 #ifdef DEBUG
2662 	if (progress & IBD_DRV_RC_PRIVATE_STATE) {
2663 		kstat_delete(state->rc_ksp);
2664 		state->id_mac_state &= (~IBD_DRV_RC_PRIVATE_STATE);
2665 	}
2666 #endif
2667 
2668 	if (progress & IBD_DRV_STATE_INITIALIZED) {
2669 		ibd_state_fini(state);
2670 		state->id_mac_state &= (~IBD_DRV_STATE_INITIALIZED);
2671 	}
2672 }
2673 
2674 int
ibd_part_attach(ibd_state_t * state,dev_info_t * dip)2675 ibd_part_attach(ibd_state_t *state, dev_info_t *dip)
2676 {
2677 	ibt_status_t ret;
2678 	int rv;
2679 	kthread_t *kht;
2680 
2681 	/*
2682 	 * Initialize mutexes and condition variables
2683 	 */
2684 	if (ibd_state_init(state, dip) != DDI_SUCCESS) {
2685 		DPRINT(10, "ibd_part_attach: failed in ibd_state_init()");
2686 		return (DDI_FAILURE);
2687 	}
2688 	state->id_mac_state |= IBD_DRV_STATE_INITIALIZED;
2689 
2690 	/*
2691 	 * Allocate rx,tx softintr
2692 	 */
2693 	if (ibd_rx_softintr == 1) {
2694 		if ((rv = ddi_add_softintr(dip, DDI_SOFTINT_LOW, &state->id_rx,
2695 		    NULL, NULL, ibd_intr, (caddr_t)state)) != DDI_SUCCESS) {
2696 			DPRINT(10, "ibd_part_attach: failed in "
2697 			    "ddi_add_softintr(id_rx),  ret=%d", rv);
2698 			return (DDI_FAILURE);
2699 		}
2700 		state->id_mac_state |= IBD_DRV_RXINTR_ADDED;
2701 	}
2702 	if (ibd_tx_softintr == 1) {
2703 		if ((rv = ddi_add_softintr(dip, DDI_SOFTINT_LOW, &state->id_tx,
2704 		    NULL, NULL, ibd_tx_recycle,
2705 		    (caddr_t)state)) != DDI_SUCCESS) {
2706 			DPRINT(10, "ibd_part_attach: failed in "
2707 			    "ddi_add_softintr(id_tx), ret=%d", rv);
2708 			return (DDI_FAILURE);
2709 		}
2710 		state->id_mac_state |= IBD_DRV_TXINTR_ADDED;
2711 	}
2712 
2713 	/*
2714 	 * Attach to IBTL
2715 	 */
2716 	mutex_enter(&ibd_gstate.ig_mutex);
2717 	if (ibd_gstate.ig_ibt_hdl == NULL) {
2718 		if ((ret = ibt_attach(&ibd_clnt_modinfo, dip, state,
2719 		    &ibd_gstate.ig_ibt_hdl)) != IBT_SUCCESS) {
2720 			DPRINT(10, "ibd_part_attach: global: failed in "
2721 			    "ibt_attach(), ret=%d", ret);
2722 			mutex_exit(&ibd_gstate.ig_mutex);
2723 			return (DDI_FAILURE);
2724 		}
2725 	}
2726 	if ((ret = ibt_attach(&ibd_clnt_modinfo, dip, state,
2727 	    &state->id_ibt_hdl)) != IBT_SUCCESS) {
2728 		DPRINT(10, "ibd_part_attach: failed in ibt_attach(), ret=%d",
2729 		    ret);
2730 		mutex_exit(&ibd_gstate.ig_mutex);
2731 		return (DDI_FAILURE);
2732 	}
2733 	ibd_gstate.ig_ibt_hdl_ref_cnt++;
2734 	mutex_exit(&ibd_gstate.ig_mutex);
2735 	state->id_mac_state |= IBD_DRV_IBTL_ATTACH_DONE;
2736 
2737 	/*
2738 	 * Open the HCA
2739 	 */
2740 	if ((ret = ibt_open_hca(state->id_ibt_hdl, state->id_hca_guid,
2741 	    &state->id_hca_hdl)) != IBT_SUCCESS) {
2742 		DPRINT(10, "ibd_part_attach: ibt_open_hca() failed, ret=%d",
2743 		    ret);
2744 		return (DDI_FAILURE);
2745 	}
2746 	state->id_mac_state |= IBD_DRV_HCA_OPENED;
2747 
2748 #ifdef DEBUG
2749 	/* Initialize Driver Counters for Reliable Connected Mode */
2750 	if (state->id_enable_rc) {
2751 		if (ibd_rc_init_stats(state) != DDI_SUCCESS) {
2752 			DPRINT(10, "ibd_part_attach: failed in "
2753 			    "ibd_rc_init_stats");
2754 			return (DDI_FAILURE);
2755 		}
2756 		state->id_mac_state |= IBD_DRV_RC_PRIVATE_STATE;
2757 	}
2758 #endif
2759 
2760 	/*
2761 	 * Record capabilities
2762 	 */
2763 	(void) ibd_record_capab(state);
2764 
2765 	/*
2766 	 * Allocate a protection domain on the HCA
2767 	 */
2768 	if ((ret = ibt_alloc_pd(state->id_hca_hdl, IBT_PD_NO_FLAGS,
2769 	    &state->id_pd_hdl)) != IBT_SUCCESS) {
2770 		DPRINT(10, "ibd_part_attach: ibt_alloc_pd() failed, ret=%d",
2771 		    ret);
2772 		return (DDI_FAILURE);
2773 	}
2774 	state->id_mac_state |= IBD_DRV_PD_ALLOCD;
2775 
2776 
2777 	/*
2778 	 * We need to initialise the req_list that is required for the
2779 	 * operation of the async_thread.
2780 	 */
2781 	mutex_init(&state->id_acache_req_lock, NULL, MUTEX_DRIVER, NULL);
2782 	cv_init(&state->id_acache_req_cv, NULL, CV_DEFAULT, NULL);
2783 	list_create(&state->id_req_list, sizeof (ibd_req_t),
2784 	    offsetof(ibd_req_t, rq_list));
2785 	state->id_mac_state |= IBD_DRV_REQ_LIST_INITED;
2786 
2787 	/*
2788 	 * Create the async thread; thread_create never fails.
2789 	 */
2790 	kht = thread_create(NULL, 0, ibd_async_work, state, 0, &p0,
2791 	    TS_RUN, minclsyspri);
2792 	state->id_async_thrid = kht->t_did;
2793 	state->id_mac_state |= IBD_DRV_ASYNC_THR_CREATED;
2794 
2795 	return (DDI_SUCCESS);
2796 }
2797 
2798 /*
2799  * Attach device to the IO framework.
2800  */
2801 static int
ibd_attach(dev_info_t * dip,ddi_attach_cmd_t cmd)2802 ibd_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
2803 {
2804 	int ret;
2805 
2806 	switch (cmd) {
2807 		case DDI_ATTACH:
2808 			ret = ibd_port_attach(dip);
2809 			break;
2810 		default:
2811 			ret = DDI_FAILURE;
2812 			break;
2813 	}
2814 	return (ret);
2815 }
2816 
2817 /*
2818  * Detach device from the IO framework.
2819  */
2820 static int
ibd_detach(dev_info_t * dip,ddi_detach_cmd_t cmd)2821 ibd_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
2822 {
2823 	ibd_state_t *state;
2824 	int instance;
2825 
2826 	/*
2827 	 * IBD doesn't support suspend/resume
2828 	 */
2829 	if (cmd != DDI_DETACH)
2830 		return (DDI_FAILURE);
2831 
2832 	/*
2833 	 * Get the instance softstate
2834 	 */
2835 	instance = ddi_get_instance(dip);
2836 	state = ddi_get_soft_state(ibd_list, instance);
2837 
2838 	/*
2839 	 * Release all resources we're holding still.  Note that if we'd
2840 	 * done ibd_attach(), ibd_m_start() and ibd_m_stop() correctly
2841 	 * so far, we should find all the flags we need in id_mac_state.
2842 	 */
2843 	return (ibd_port_unattach(state, dip));
2844 }
2845 
2846 /*
2847  * Pre ibt_attach() driver initialization
2848  */
2849 static int
ibd_state_init(ibd_state_t * state,dev_info_t * dip)2850 ibd_state_init(ibd_state_t *state, dev_info_t *dip)
2851 {
2852 	char buf[64];
2853 
2854 	mutex_init(&state->id_link_mutex, NULL, MUTEX_DRIVER, NULL);
2855 	state->id_link_state = LINK_STATE_UNKNOWN;
2856 
2857 	mutex_init(&state->id_trap_lock, NULL, MUTEX_DRIVER, NULL);
2858 	cv_init(&state->id_trap_cv, NULL, CV_DEFAULT, NULL);
2859 	state->id_trap_stop = B_TRUE;
2860 	state->id_trap_inprog = 0;
2861 
2862 	mutex_init(&state->id_scq_poll_lock, NULL, MUTEX_DRIVER, NULL);
2863 	mutex_init(&state->id_rcq_poll_lock, NULL, MUTEX_DRIVER, NULL);
2864 	state->id_dip = dip;
2865 
2866 	mutex_init(&state->id_sched_lock, NULL, MUTEX_DRIVER, NULL);
2867 
2868 	mutex_init(&state->id_tx_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
2869 	mutex_init(&state->id_tx_rel_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
2870 	mutex_init(&state->id_txpost_lock, NULL, MUTEX_DRIVER, NULL);
2871 	state->id_tx_busy = 0;
2872 	mutex_init(&state->id_lso_lock, NULL, MUTEX_DRIVER, NULL);
2873 
2874 	state->id_rx_list.dl_bufs_outstanding = 0;
2875 	state->id_rx_list.dl_cnt = 0;
2876 	mutex_init(&state->id_rx_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
2877 	mutex_init(&state->id_rx_free_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
2878 	(void) sprintf(buf, "ibd_req%d_%x_%u", ddi_get_instance(dip),
2879 	    state->id_pkey, state->id_plinkid);
2880 	state->id_req_kmc = kmem_cache_create(buf, sizeof (ibd_req_t),
2881 	    0, NULL, NULL, NULL, NULL, NULL, 0);
2882 
2883 	/* For Reliable Connected Mode */
2884 	mutex_init(&state->rc_rx_lock, NULL, MUTEX_DRIVER, NULL);
2885 	mutex_init(&state->rc_tx_large_bufs_lock, NULL, MUTEX_DRIVER, NULL);
2886 	mutex_init(&state->rc_srq_rwqe_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
2887 	mutex_init(&state->rc_srq_free_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
2888 	mutex_init(&state->rc_pass_chan_list.chan_list_mutex, NULL,
2889 	    MUTEX_DRIVER, NULL);
2890 	mutex_init(&state->rc_timeout_lock, NULL, MUTEX_DRIVER, NULL);
2891 
2892 	/*
2893 	 * Make the default link mode as RC. If this fails during connection
2894 	 * setup, the link mode is automatically transitioned to UD.
2895 	 * Also set the RC MTU.
2896 	 */
2897 	state->id_enable_rc = IBD_DEF_LINK_MODE;
2898 	state->rc_mtu = IBD_DEF_RC_MAX_MTU;
2899 	state->id_mtu = IBD_DEF_MAX_MTU;
2900 
2901 	/* Iniatialize all tunables to default */
2902 	state->id_lso_policy = IBD_DEF_LSO_POLICY;
2903 	state->id_num_lso_bufs = IBD_DEF_NUM_LSO_BUFS;
2904 	state->id_num_ah = IBD_DEF_NUM_AH;
2905 	state->id_hash_size = IBD_DEF_HASH_SIZE;
2906 	state->id_create_broadcast_group = IBD_DEF_CREATE_BCAST_GROUP;
2907 	state->id_allow_coalesce_comp_tuning = IBD_DEF_COALESCE_COMPLETIONS;
2908 	state->id_ud_rx_comp_count = IBD_DEF_UD_RX_COMP_COUNT;
2909 	state->id_ud_rx_comp_usec = IBD_DEF_UD_RX_COMP_USEC;
2910 	state->id_ud_tx_comp_count = IBD_DEF_UD_TX_COMP_COUNT;
2911 	state->id_ud_tx_comp_usec = IBD_DEF_UD_TX_COMP_USEC;
2912 	state->id_rc_rx_comp_count = IBD_DEF_RC_RX_COMP_COUNT;
2913 	state->id_rc_rx_comp_usec = IBD_DEF_RC_RX_COMP_USEC;
2914 	state->id_rc_tx_comp_count = IBD_DEF_RC_TX_COMP_COUNT;
2915 	state->id_rc_tx_comp_usec = IBD_DEF_RC_TX_COMP_USEC;
2916 	state->id_ud_tx_copy_thresh = IBD_DEF_UD_TX_COPY_THRESH;
2917 	state->id_rc_rx_copy_thresh = IBD_DEF_RC_RX_COPY_THRESH;
2918 	state->id_rc_tx_copy_thresh = IBD_DEF_RC_TX_COPY_THRESH;
2919 	state->id_ud_num_rwqe = IBD_DEF_UD_NUM_RWQE;
2920 	state->id_ud_num_swqe = IBD_DEF_UD_NUM_SWQE;
2921 	state->id_rc_num_rwqe = IBD_DEF_RC_NUM_RWQE;
2922 	state->id_rc_num_swqe = IBD_DEF_RC_NUM_SWQE;
2923 	state->rc_enable_srq = IBD_DEF_RC_ENABLE_SRQ;
2924 	state->id_rc_num_srq = IBD_DEF_RC_NUM_SRQ;
2925 	state->id_rc_rx_rwqe_thresh = IBD_DEF_RC_RX_RWQE_THRESH;
2926 
2927 	return (DDI_SUCCESS);
2928 }
2929 
2930 /*
2931  * Post ibt_detach() driver deconstruction
2932  */
2933 static void
ibd_state_fini(ibd_state_t * state)2934 ibd_state_fini(ibd_state_t *state)
2935 {
2936 	kmem_cache_destroy(state->id_req_kmc);
2937 
2938 	mutex_destroy(&state->id_rx_list.dl_mutex);
2939 	mutex_destroy(&state->id_rx_free_list.dl_mutex);
2940 
2941 	mutex_destroy(&state->id_txpost_lock);
2942 	mutex_destroy(&state->id_tx_list.dl_mutex);
2943 	mutex_destroy(&state->id_tx_rel_list.dl_mutex);
2944 	mutex_destroy(&state->id_lso_lock);
2945 
2946 	mutex_destroy(&state->id_sched_lock);
2947 	mutex_destroy(&state->id_scq_poll_lock);
2948 	mutex_destroy(&state->id_rcq_poll_lock);
2949 
2950 	cv_destroy(&state->id_trap_cv);
2951 	mutex_destroy(&state->id_trap_lock);
2952 	mutex_destroy(&state->id_link_mutex);
2953 
2954 	/* For Reliable Connected Mode */
2955 	mutex_destroy(&state->rc_timeout_lock);
2956 	mutex_destroy(&state->rc_srq_free_list.dl_mutex);
2957 	mutex_destroy(&state->rc_srq_rwqe_list.dl_mutex);
2958 	mutex_destroy(&state->rc_pass_chan_list.chan_list_mutex);
2959 	mutex_destroy(&state->rc_tx_large_bufs_lock);
2960 	mutex_destroy(&state->rc_rx_lock);
2961 }
2962 
2963 /*
2964  * Fetch link speed from SA for snmp ifspeed reporting.
2965  */
2966 static uint64_t
ibd_get_portspeed(ibd_state_t * state)2967 ibd_get_portspeed(ibd_state_t *state)
2968 {
2969 	int			ret;
2970 	ibt_path_info_t		path;
2971 	ibt_path_attr_t		path_attr;
2972 	uint8_t			num_paths;
2973 	uint64_t		ifspeed;
2974 
2975 	/*
2976 	 * Due to serdes 8b10b encoding on the wire, 2.5 Gbps on wire
2977 	 * translates to 2 Gbps data rate. Thus, 1X single data rate is
2978 	 * 2000000000. Start with that as default.
2979 	 */
2980 	ifspeed = 2000000000;
2981 
2982 	bzero(&path_attr, sizeof (path_attr));
2983 
2984 	/*
2985 	 * Get the port speed from Loopback path information.
2986 	 */
2987 	path_attr.pa_dgids = &state->id_sgid;
2988 	path_attr.pa_num_dgids = 1;
2989 	path_attr.pa_sgid = state->id_sgid;
2990 
2991 	if (ibt_get_paths(state->id_ibt_hdl, IBT_PATH_NO_FLAGS,
2992 	    &path_attr, 1, &path, &num_paths) != IBT_SUCCESS)
2993 		goto earlydone;
2994 
2995 	if (num_paths < 1)
2996 		goto earlydone;
2997 
2998 	/*
2999 	 * In case SA does not return an expected value, report the default
3000 	 * speed as 1X.
3001 	 */
3002 	ret = 1;
3003 	switch (path.pi_prim_cep_path.cep_adds_vect.av_srate) {
3004 		case IBT_SRATE_2:	/*  1X SDR i.e 2.5 Gbps */
3005 			ret = 1;
3006 			break;
3007 		case IBT_SRATE_10:	/*  4X SDR or 1X QDR i.e 10 Gbps */
3008 			ret = 4;
3009 			break;
3010 		case IBT_SRATE_30:	/* 12X SDR i.e 30 Gbps */
3011 			ret = 12;
3012 			break;
3013 		case IBT_SRATE_5:	/*  1X DDR i.e  5 Gbps */
3014 			ret = 2;
3015 			break;
3016 		case IBT_SRATE_20:	/*  4X DDR or 8X SDR i.e 20 Gbps */
3017 			ret = 8;
3018 			break;
3019 		case IBT_SRATE_40:	/*  8X DDR or 4X QDR i.e 40 Gbps */
3020 			ret = 16;
3021 			break;
3022 		case IBT_SRATE_60:	/* 12X DDR i.e 60 Gbps */
3023 			ret = 24;
3024 			break;
3025 		case IBT_SRATE_80:	/*  8X QDR i.e 80 Gbps */
3026 			ret = 32;
3027 			break;
3028 		case IBT_SRATE_120:	/* 12X QDR i.e 120 Gbps */
3029 			ret = 48;
3030 			break;
3031 	}
3032 
3033 	ifspeed *= ret;
3034 
3035 earlydone:
3036 	return (ifspeed);
3037 }
3038 
3039 /*
3040  * Search input mcg list (id_mc_full or id_mc_non) for an entry
3041  * representing the input mcg mgid.
3042  */
3043 static ibd_mce_t *
ibd_mcache_find(ib_gid_t mgid,struct list * mlist)3044 ibd_mcache_find(ib_gid_t mgid, struct list *mlist)
3045 {
3046 	ibd_mce_t *ptr = list_head(mlist);
3047 
3048 	/*
3049 	 * Do plain linear search.
3050 	 */
3051 	while (ptr != NULL) {
3052 		if (bcmp(&mgid, &ptr->mc_info.mc_adds_vect.av_dgid,
3053 		    sizeof (ib_gid_t)) == 0)
3054 			return (ptr);
3055 		ptr = list_next(mlist, ptr);
3056 	}
3057 	return (NULL);
3058 }
3059 
3060 /*
3061  * Execute IBA JOIN.
3062  */
3063 static ibt_status_t
ibd_iba_join(ibd_state_t * state,ib_gid_t mgid,ibd_mce_t * mce)3064 ibd_iba_join(ibd_state_t *state, ib_gid_t mgid, ibd_mce_t *mce)
3065 {
3066 	ibt_mcg_attr_t mcg_attr;
3067 
3068 	bzero(&mcg_attr, sizeof (ibt_mcg_attr_t));
3069 	mcg_attr.mc_qkey = state->id_mcinfo->mc_qkey;
3070 	mcg_attr.mc_mgid = mgid;
3071 	mcg_attr.mc_join_state = mce->mc_jstate;
3072 	mcg_attr.mc_scope = state->id_scope;
3073 	mcg_attr.mc_pkey = state->id_pkey;
3074 	mcg_attr.mc_flow = state->id_mcinfo->mc_adds_vect.av_flow;
3075 	mcg_attr.mc_sl = state->id_mcinfo->mc_adds_vect.av_srvl;
3076 	mcg_attr.mc_tclass = state->id_mcinfo->mc_adds_vect.av_tclass;
3077 	return (ibt_join_mcg(state->id_sgid, &mcg_attr, &mce->mc_info,
3078 	    NULL, NULL));
3079 }
3080 
3081 /*
3082  * This code JOINs the port in the proper way (depending on the join
3083  * state) so that IBA fabric will forward mcg packets to/from the port.
3084  * It also attaches the QPN to the mcg so it can receive those mcg
3085  * packets. This code makes sure not to attach the mcg to the QP if
3086  * that has been previously done due to the mcg being joined with a
3087  * different join state, even though this is not required by SWG_0216,
3088  * refid 3610.
3089  */
3090 static ibd_mce_t *
ibd_join_group(ibd_state_t * state,ib_gid_t mgid,uint8_t jstate)3091 ibd_join_group(ibd_state_t *state, ib_gid_t mgid, uint8_t jstate)
3092 {
3093 	ibt_status_t ibt_status;
3094 	ibd_mce_t *mce, *tmce, *omce = NULL;
3095 	boolean_t do_attach = B_TRUE;
3096 
3097 	DPRINT(2, "ibd_join_group : join_group state %d : %016llx:%016llx\n",
3098 	    jstate, mgid.gid_prefix, mgid.gid_guid);
3099 
3100 	/*
3101 	 * For enable_multicast Full member joins, we need to do some
3102 	 * extra work. If there is already an mce on the list that
3103 	 * indicates full membership, that means the membership has
3104 	 * not yet been dropped (since the disable_multicast was issued)
3105 	 * because there are pending Tx's to the mcg; in that case, just
3106 	 * mark the mce not to be reaped when the Tx completion queues
3107 	 * an async reap operation.
3108 	 *
3109 	 * If there is already an mce on the list indicating sendonly
3110 	 * membership, try to promote to full membership. Be careful
3111 	 * not to deallocate the old mce, since there might be an AH
3112 	 * pointing to it; instead, update the old mce with new data
3113 	 * that tracks the full membership.
3114 	 */
3115 	if ((jstate == IB_MC_JSTATE_FULL) && ((omce =
3116 	    IBD_MCACHE_FIND_FULL(state, mgid)) != NULL)) {
3117 		if (omce->mc_jstate == IB_MC_JSTATE_FULL) {
3118 			ASSERT(omce->mc_fullreap);
3119 			omce->mc_fullreap = B_FALSE;
3120 			return (omce);
3121 		} else {
3122 			ASSERT(omce->mc_jstate == IB_MC_JSTATE_SEND_ONLY_NON);
3123 		}
3124 	}
3125 
3126 	/*
3127 	 * Allocate the ibd_mce_t to track this JOIN.
3128 	 */
3129 	mce = kmem_zalloc(sizeof (ibd_mce_t), KM_SLEEP);
3130 	mce->mc_fullreap = B_FALSE;
3131 	mce->mc_jstate = jstate;
3132 
3133 	if ((ibt_status = ibd_iba_join(state, mgid, mce)) != IBT_SUCCESS) {
3134 		DPRINT(10, "ibd_join_group : failed ibt_join_mcg() %d",
3135 		    ibt_status);
3136 		kmem_free(mce, sizeof (ibd_mce_t));
3137 		return (NULL);
3138 	}
3139 
3140 	/*
3141 	 * Is an IBA attach required? Not if the interface is already joined
3142 	 * to the mcg in a different appropriate join state.
3143 	 */
3144 	if (jstate == IB_MC_JSTATE_NON) {
3145 		tmce = IBD_MCACHE_FIND_FULL(state, mgid);
3146 		if ((tmce != NULL) && (tmce->mc_jstate == IB_MC_JSTATE_FULL))
3147 			do_attach = B_FALSE;
3148 	} else if (jstate == IB_MC_JSTATE_FULL) {
3149 		if (IBD_MCACHE_FIND_NON(state, mgid) != NULL)
3150 			do_attach = B_FALSE;
3151 	} else {	/* jstate == IB_MC_JSTATE_SEND_ONLY_NON */
3152 		do_attach = B_FALSE;
3153 	}
3154 
3155 	if (do_attach) {
3156 		/*
3157 		 * Do the IBA attach.
3158 		 */
3159 		DPRINT(10, "ibd_join_group: ibt_attach_mcg \n");
3160 		if ((ibt_status = ibt_attach_mcg(state->id_chnl_hdl,
3161 		    &mce->mc_info)) != IBT_SUCCESS) {
3162 			DPRINT(10, "ibd_join_group : failed qp attachment "
3163 			    "%d\n", ibt_status);
3164 			/*
3165 			 * NOTE that we should probably preserve the join info
3166 			 * in the list and later try to leave again at detach
3167 			 * time.
3168 			 */
3169 			(void) ibt_leave_mcg(state->id_sgid, mgid,
3170 			    state->id_sgid, jstate);
3171 			kmem_free(mce, sizeof (ibd_mce_t));
3172 			return (NULL);
3173 		}
3174 	}
3175 
3176 	/*
3177 	 * Insert the ibd_mce_t in the proper list.
3178 	 */
3179 	if (jstate == IB_MC_JSTATE_NON) {
3180 		IBD_MCACHE_INSERT_NON(state, mce);
3181 	} else {
3182 		/*
3183 		 * Set up the mc_req fields used for reaping the
3184 		 * mcg in case of delayed tx completion (see
3185 		 * ibd_tx_cleanup()). Also done for sendonly join in
3186 		 * case we are promoted to fullmembership later and
3187 		 * keep using the same mce.
3188 		 */
3189 		mce->mc_req.rq_gid = mgid;
3190 		mce->mc_req.rq_ptr = mce;
3191 		/*
3192 		 * Check whether this is the case of trying to join
3193 		 * full member, and we were already joined send only.
3194 		 * We try to drop our SendOnly membership, but it is
3195 		 * possible that the mcg does not exist anymore (and
3196 		 * the subnet trap never reached us), so the leave
3197 		 * operation might fail.
3198 		 */
3199 		if (omce != NULL) {
3200 			(void) ibt_leave_mcg(state->id_sgid, mgid,
3201 			    state->id_sgid, IB_MC_JSTATE_SEND_ONLY_NON);
3202 			omce->mc_jstate = IB_MC_JSTATE_FULL;
3203 			bcopy(&mce->mc_info, &omce->mc_info,
3204 			    sizeof (ibt_mcg_info_t));
3205 			kmem_free(mce, sizeof (ibd_mce_t));
3206 			return (omce);
3207 		}
3208 		mutex_enter(&state->id_mc_mutex);
3209 		IBD_MCACHE_INSERT_FULL(state, mce);
3210 		mutex_exit(&state->id_mc_mutex);
3211 	}
3212 
3213 	return (mce);
3214 }
3215 
3216 /*
3217  * Called during port up event handling to attempt to reacquire full
3218  * membership to an mcg. Stripped down version of ibd_join_group().
3219  * Note that it is possible that the mcg might have gone away, and
3220  * gets recreated at this point.
3221  */
3222 static void
ibd_reacquire_group(ibd_state_t * state,ibd_mce_t * mce)3223 ibd_reacquire_group(ibd_state_t *state, ibd_mce_t *mce)
3224 {
3225 	ib_gid_t mgid;
3226 
3227 	/*
3228 	 * If the mc_fullreap flag is set, or this join fails, a subsequent
3229 	 * reap/leave is going to try to leave the group. We could prevent
3230 	 * that by adding a boolean flag into ibd_mce_t, if required.
3231 	 */
3232 	if (mce->mc_fullreap)
3233 		return;
3234 
3235 	mgid = mce->mc_info.mc_adds_vect.av_dgid;
3236 
3237 	DPRINT(2, "ibd_reacquire_group : %016llx:%016llx\n", mgid.gid_prefix,
3238 	    mgid.gid_guid);
3239 
3240 	/* While reacquiring, leave and then join the MCG */
3241 	(void) ibt_leave_mcg(state->id_sgid, mgid, state->id_sgid,
3242 	    mce->mc_jstate);
3243 	if (ibd_iba_join(state, mgid, mce) != IBT_SUCCESS)
3244 		ibd_print_warn(state, "Failure on port up to rejoin "
3245 		    "multicast gid %016llx:%016llx",
3246 		    (u_longlong_t)mgid.gid_prefix,
3247 		    (u_longlong_t)mgid.gid_guid);
3248 }
3249 
3250 /*
3251  * This code handles delayed Tx completion cleanups for mcg's to which
3252  * disable_multicast has been issued, regular mcg related cleanups during
3253  * disable_multicast, disable_promiscuous and mcg traps, as well as
3254  * cleanups during driver detach time. Depending on the join state,
3255  * it deletes the mce from the appropriate list and issues the IBA
3256  * leave/detach; except in the disable_multicast case when the mce
3257  * is left on the active list for a subsequent Tx completion cleanup.
3258  */
3259 static void
ibd_async_reap_group(ibd_state_t * state,ibd_mce_t * mce,ib_gid_t mgid,uint8_t jstate)3260 ibd_async_reap_group(ibd_state_t *state, ibd_mce_t *mce, ib_gid_t mgid,
3261     uint8_t jstate)
3262 {
3263 	ibd_mce_t *tmce;
3264 	boolean_t do_detach = B_TRUE;
3265 
3266 	/*
3267 	 * Before detaching, we must check whether the other list
3268 	 * contains the mcg; if we detach blindly, the consumer
3269 	 * who set up the other list will also stop receiving
3270 	 * traffic.
3271 	 */
3272 	if (jstate == IB_MC_JSTATE_FULL) {
3273 		/*
3274 		 * The following check is only relevant while coming
3275 		 * from the Tx completion path in the reap case.
3276 		 */
3277 		if (!mce->mc_fullreap)
3278 			return;
3279 		mutex_enter(&state->id_mc_mutex);
3280 		IBD_MCACHE_PULLOUT_FULL(state, mce);
3281 		mutex_exit(&state->id_mc_mutex);
3282 		if (IBD_MCACHE_FIND_NON(state, mgid) != NULL)
3283 			do_detach = B_FALSE;
3284 	} else if (jstate == IB_MC_JSTATE_NON) {
3285 		IBD_MCACHE_PULLOUT_NON(state, mce);
3286 		tmce = IBD_MCACHE_FIND_FULL(state, mgid);
3287 		if ((tmce != NULL) && (tmce->mc_jstate == IB_MC_JSTATE_FULL))
3288 			do_detach = B_FALSE;
3289 	} else {	/* jstate == IB_MC_JSTATE_SEND_ONLY_NON */
3290 		mutex_enter(&state->id_mc_mutex);
3291 		IBD_MCACHE_PULLOUT_FULL(state, mce);
3292 		mutex_exit(&state->id_mc_mutex);
3293 		do_detach = B_FALSE;
3294 	}
3295 
3296 	/*
3297 	 * If we are reacting to a mcg trap and leaving our sendonly or
3298 	 * non membership, the mcg is possibly already gone, so attempting
3299 	 * to leave might fail. On the other hand, we must try to leave
3300 	 * anyway, since this might be a trap from long ago, and we could
3301 	 * have potentially sendonly joined to a recent incarnation of
3302 	 * the mcg and are about to loose track of this information.
3303 	 */
3304 	if (do_detach) {
3305 		DPRINT(2, "ibd_async_reap_group : ibt_detach_mcg : "
3306 		    "%016llx:%016llx\n", mgid.gid_prefix, mgid.gid_guid);
3307 		(void) ibt_detach_mcg(state->id_chnl_hdl, &mce->mc_info);
3308 	}
3309 
3310 	(void) ibt_leave_mcg(state->id_sgid, mgid, state->id_sgid, jstate);
3311 	kmem_free(mce, sizeof (ibd_mce_t));
3312 }
3313 
3314 /*
3315  * Async code executed due to multicast and promiscuous disable requests
3316  * and mcg trap handling; also executed during driver detach. Mostly, a
3317  * leave and detach is done; except for the fullmember case when Tx
3318  * requests are pending, whence arrangements are made for subsequent
3319  * cleanup on Tx completion.
3320  */
3321 static void
ibd_leave_group(ibd_state_t * state,ib_gid_t mgid,uint8_t jstate)3322 ibd_leave_group(ibd_state_t *state, ib_gid_t mgid, uint8_t jstate)
3323 {
3324 	ipoib_mac_t mcmac;
3325 	boolean_t recycled;
3326 	ibd_mce_t *mce;
3327 
3328 	DPRINT(2, "ibd_leave_group : leave_group state %d : %016llx:%016llx\n",
3329 	    jstate, mgid.gid_prefix, mgid.gid_guid);
3330 
3331 	if (jstate == IB_MC_JSTATE_NON) {
3332 		recycled = B_TRUE;
3333 		mce = IBD_MCACHE_FIND_NON(state, mgid);
3334 		/*
3335 		 * In case we are handling a mcg trap, we might not find
3336 		 * the mcg in the non list.
3337 		 */
3338 		if (mce == NULL) {
3339 			return;
3340 		}
3341 	} else {
3342 		mce = IBD_MCACHE_FIND_FULL(state, mgid);
3343 
3344 		/*
3345 		 * In case we are handling a mcg trap, make sure the trap
3346 		 * is not arriving late; if we have an mce that indicates
3347 		 * that we are already a fullmember, that would be a clear
3348 		 * indication that the trap arrived late (ie, is for a
3349 		 * previous incarnation of the mcg).
3350 		 */
3351 		if (jstate == IB_MC_JSTATE_SEND_ONLY_NON) {
3352 			if ((mce == NULL) || (mce->mc_jstate ==
3353 			    IB_MC_JSTATE_FULL)) {
3354 				return;
3355 			}
3356 		} else {
3357 			ASSERT(jstate == IB_MC_JSTATE_FULL);
3358 
3359 			/*
3360 			 * If join group failed, mce will be NULL here.
3361 			 * This is because in GLDv3 driver, set multicast
3362 			 *  will always return success.
3363 			 */
3364 			if (mce == NULL) {
3365 				return;
3366 			}
3367 
3368 			mce->mc_fullreap = B_TRUE;
3369 		}
3370 
3371 		/*
3372 		 * If no pending Tx's remain that reference the AH
3373 		 * for the mcg, recycle it from active to free list.
3374 		 * Else in the IB_MC_JSTATE_FULL case, just mark the AH,
3375 		 * so the last completing Tx will cause an async reap
3376 		 * operation to be invoked, at which time we will drop our
3377 		 * membership to the mcg so that the pending Tx's complete
3378 		 * successfully. Refer to comments on "AH and MCE active
3379 		 * list manipulation" at top of this file. The lock protects
3380 		 * against Tx fast path and Tx cleanup code.
3381 		 */
3382 		mutex_enter(&state->id_ac_mutex);
3383 		ibd_h2n_mac(&mcmac, IB_MC_QPN, mgid.gid_prefix, mgid.gid_guid);
3384 		recycled = ibd_acache_recycle(state, &mcmac, (jstate ==
3385 		    IB_MC_JSTATE_SEND_ONLY_NON));
3386 		mutex_exit(&state->id_ac_mutex);
3387 	}
3388 
3389 	if (recycled) {
3390 		DPRINT(2, "ibd_leave_group : leave_group reaping : "
3391 		    "%016llx:%016llx\n", mgid.gid_prefix, mgid.gid_guid);
3392 		ibd_async_reap_group(state, mce, mgid, jstate);
3393 	}
3394 }
3395 
3396 /*
3397  * Find the broadcast address as defined by IPoIB; implicitly
3398  * determines the IBA scope, mtu, tclass etc of the link the
3399  * interface is going to be a member of.
3400  */
3401 static ibt_status_t
ibd_find_bgroup(ibd_state_t * state)3402 ibd_find_bgroup(ibd_state_t *state)
3403 {
3404 	ibt_mcg_attr_t mcg_attr;
3405 	uint_t numg;
3406 	uchar_t scopes[] = { IB_MC_SCOPE_SUBNET_LOCAL,
3407 	    IB_MC_SCOPE_SITE_LOCAL, IB_MC_SCOPE_ORG_LOCAL,
3408 	    IB_MC_SCOPE_GLOBAL };
3409 	int i, mcgmtu;
3410 	boolean_t found = B_FALSE;
3411 	int ret;
3412 	ibt_mcg_info_t mcg_info;
3413 
3414 	state->id_bgroup_created = B_FALSE;
3415 	state->id_bgroup_present = B_FALSE;
3416 
3417 query_bcast_grp:
3418 	bzero(&mcg_attr, sizeof (ibt_mcg_attr_t));
3419 	mcg_attr.mc_pkey = state->id_pkey;
3420 	_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(state->id_mgid))
3421 	state->id_mgid.gid_guid = IB_MGID_IPV4_LOWGRP_MASK;
3422 	_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(state->id_mgid))
3423 
3424 	for (i = 0; i < sizeof (scopes)/sizeof (scopes[0]); i++) {
3425 		state->id_scope = mcg_attr.mc_scope = scopes[i];
3426 
3427 		/*
3428 		 * Look for the IPoIB broadcast group.
3429 		 */
3430 		_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(state->id_mgid))
3431 		state->id_mgid.gid_prefix =
3432 		    (((uint64_t)IB_MCGID_IPV4_PREFIX << 32) |
3433 		    ((uint64_t)state->id_scope << 48) |
3434 		    ((uint32_t)(state->id_pkey << 16)));
3435 		mcg_attr.mc_mgid = state->id_mgid;
3436 		_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(state->id_mgid))
3437 		if (ibt_query_mcg(state->id_sgid, &mcg_attr, 1,
3438 		    &state->id_mcinfo, &numg) == IBT_SUCCESS) {
3439 			found = B_TRUE;
3440 			break;
3441 		}
3442 	}
3443 
3444 	if (!found) {
3445 		if (state->id_create_broadcast_group) {
3446 			/*
3447 			 * If we created the broadcast group, but failed to
3448 			 * find it, we can't do anything except leave the
3449 			 * one we created and return failure.
3450 			 */
3451 			if (state->id_bgroup_created) {
3452 				ibd_print_warn(state, "IPoIB broadcast group "
3453 				    "absent. Unable to query after create.");
3454 				goto find_bgroup_fail;
3455 			}
3456 
3457 			/*
3458 			 * Create the ipoib broadcast group if it didn't exist
3459 			 */
3460 			bzero(&mcg_attr, sizeof (ibt_mcg_attr_t));
3461 			mcg_attr.mc_qkey = IBD_DEFAULT_QKEY;
3462 			mcg_attr.mc_join_state = IB_MC_JSTATE_FULL;
3463 			mcg_attr.mc_scope = IB_MC_SCOPE_SUBNET_LOCAL;
3464 			mcg_attr.mc_pkey = state->id_pkey;
3465 			mcg_attr.mc_flow = 0;
3466 			mcg_attr.mc_sl = 0;
3467 			mcg_attr.mc_tclass = 0;
3468 			_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(state->id_mgid))
3469 			state->id_mgid.gid_prefix =
3470 			    (((uint64_t)IB_MCGID_IPV4_PREFIX << 32) |
3471 			    ((uint64_t)IB_MC_SCOPE_SUBNET_LOCAL << 48) |
3472 			    ((uint32_t)(state->id_pkey << 16)));
3473 			mcg_attr.mc_mgid = state->id_mgid;
3474 			_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(state->id_mgid))
3475 
3476 			if ((ret = ibt_join_mcg(state->id_sgid, &mcg_attr,
3477 			    &mcg_info, NULL, NULL)) != IBT_SUCCESS) {
3478 				ibd_print_warn(state, "IPoIB broadcast group "
3479 				    "absent, create failed: ret = %d\n", ret);
3480 				state->id_bgroup_created = B_FALSE;
3481 				return (IBT_FAILURE);
3482 			}
3483 			state->id_bgroup_created = B_TRUE;
3484 			goto query_bcast_grp;
3485 		} else {
3486 			ibd_print_warn(state, "IPoIB broadcast group absent");
3487 			return (IBT_FAILURE);
3488 		}
3489 	}
3490 
3491 	/*
3492 	 * Assert that the mcg mtu <= id_mtu. Fill in updated id_mtu.
3493 	 */
3494 	mcgmtu = (128 << state->id_mcinfo->mc_mtu);
3495 	if (state->id_mtu < mcgmtu) {
3496 		ibd_print_warn(state, "IPoIB broadcast group MTU %d "
3497 		    "greater than port's maximum MTU %d", mcgmtu,
3498 		    state->id_mtu);
3499 		ibt_free_mcg_info(state->id_mcinfo, 1);
3500 		goto find_bgroup_fail;
3501 	}
3502 	state->id_mtu = mcgmtu;
3503 	state->id_bgroup_present = B_TRUE;
3504 
3505 	return (IBT_SUCCESS);
3506 
3507 find_bgroup_fail:
3508 	if (state->id_bgroup_created) {
3509 		(void) ibt_leave_mcg(state->id_sgid,
3510 		    mcg_info.mc_adds_vect.av_dgid, state->id_sgid,
3511 		    IB_MC_JSTATE_FULL);
3512 	}
3513 
3514 	return (IBT_FAILURE);
3515 }
3516 
3517 static int
ibd_alloc_tx_copybufs(ibd_state_t * state)3518 ibd_alloc_tx_copybufs(ibd_state_t *state)
3519 {
3520 	ibt_mr_attr_t mem_attr;
3521 
3522 	/*
3523 	 * Allocate one big chunk for all regular tx copy bufs
3524 	 */
3525 	state->id_tx_buf_sz = state->id_mtu;
3526 	if (state->id_lso_policy && state->id_lso_capable &&
3527 	    (state->id_ud_tx_copy_thresh > state->id_mtu)) {
3528 		state->id_tx_buf_sz = state->id_ud_tx_copy_thresh;
3529 	}
3530 
3531 	state->id_tx_bufs = kmem_zalloc(state->id_ud_num_swqe *
3532 	    state->id_tx_buf_sz, KM_SLEEP);
3533 
3534 	state->id_tx_wqes = kmem_zalloc(state->id_ud_num_swqe *
3535 	    sizeof (ibd_swqe_t), KM_SLEEP);
3536 
3537 	/*
3538 	 * Do one memory registration on the entire txbuf area
3539 	 */
3540 	mem_attr.mr_vaddr = (uint64_t)(uintptr_t)state->id_tx_bufs;
3541 	mem_attr.mr_len = state->id_ud_num_swqe * state->id_tx_buf_sz;
3542 	mem_attr.mr_as = NULL;
3543 	mem_attr.mr_flags = IBT_MR_SLEEP;
3544 	if (ibt_register_mr(state->id_hca_hdl, state->id_pd_hdl, &mem_attr,
3545 	    &state->id_tx_mr_hdl, &state->id_tx_mr_desc) != IBT_SUCCESS) {
3546 		DPRINT(10, "ibd_alloc_tx_copybufs: ibt_register_mr failed");
3547 		kmem_free(state->id_tx_wqes,
3548 		    state->id_ud_num_swqe * sizeof (ibd_swqe_t));
3549 		kmem_free(state->id_tx_bufs,
3550 		    state->id_ud_num_swqe * state->id_tx_buf_sz);
3551 		state->id_tx_bufs = NULL;
3552 		return (DDI_FAILURE);
3553 	}
3554 
3555 	return (DDI_SUCCESS);
3556 }
3557 
3558 static int
ibd_alloc_tx_lsobufs(ibd_state_t * state)3559 ibd_alloc_tx_lsobufs(ibd_state_t *state)
3560 {
3561 	ibt_mr_attr_t mem_attr;
3562 	ibd_lsobuf_t *buflist;
3563 	ibd_lsobuf_t *lbufp;
3564 	ibd_lsobuf_t *tail;
3565 	ibd_lsobkt_t *bktp;
3566 	uint8_t *membase;
3567 	uint8_t *memp;
3568 	uint_t memsz;
3569 	int i;
3570 
3571 	/*
3572 	 * Allocate the lso bucket
3573 	 */
3574 	bktp = kmem_zalloc(sizeof (ibd_lsobkt_t), KM_SLEEP);
3575 
3576 	/*
3577 	 * Allocate the entire lso memory and register it
3578 	 */
3579 	memsz = state->id_num_lso_bufs * IBD_LSO_BUFSZ;
3580 	membase = kmem_zalloc(memsz, KM_SLEEP);
3581 
3582 	mem_attr.mr_vaddr = (uint64_t)(uintptr_t)membase;
3583 	mem_attr.mr_len = memsz;
3584 	mem_attr.mr_as = NULL;
3585 	mem_attr.mr_flags = IBT_MR_SLEEP;
3586 	if (ibt_register_mr(state->id_hca_hdl, state->id_pd_hdl,
3587 	    &mem_attr, &bktp->bkt_mr_hdl, &bktp->bkt_mr_desc) != IBT_SUCCESS) {
3588 		DPRINT(10, "ibd_alloc_tx_lsobufs: ibt_register_mr failed");
3589 		kmem_free(membase, memsz);
3590 		kmem_free(bktp, sizeof (ibd_lsobkt_t));
3591 		return (DDI_FAILURE);
3592 	}
3593 
3594 	mutex_enter(&state->id_lso_lock);
3595 
3596 	/*
3597 	 * Now allocate the buflist.  Note that the elements in the buflist and
3598 	 * the buffers in the lso memory have a permanent 1-1 relation, so we
3599 	 * can always derive the address of a buflist entry from the address of
3600 	 * an lso buffer.
3601 	 */
3602 	buflist = kmem_zalloc(state->id_num_lso_bufs * sizeof (ibd_lsobuf_t),
3603 	    KM_SLEEP);
3604 
3605 	/*
3606 	 * Set up the lso buf chain
3607 	 */
3608 	memp = membase;
3609 	lbufp = buflist;
3610 	for (i = 0; i < state->id_num_lso_bufs; i++) {
3611 		lbufp->lb_isfree = 1;
3612 		lbufp->lb_buf = memp;
3613 		lbufp->lb_next = lbufp + 1;
3614 
3615 		tail = lbufp;
3616 
3617 		memp += IBD_LSO_BUFSZ;
3618 		lbufp++;
3619 	}
3620 	tail->lb_next = NULL;
3621 
3622 	/*
3623 	 * Set up the LSO buffer information in ibd state
3624 	 */
3625 	bktp->bkt_bufl = buflist;
3626 	bktp->bkt_free_head = buflist;
3627 	bktp->bkt_mem = membase;
3628 	bktp->bkt_nelem = state->id_num_lso_bufs;
3629 	bktp->bkt_nfree = bktp->bkt_nelem;
3630 
3631 	state->id_lso = bktp;
3632 	mutex_exit(&state->id_lso_lock);
3633 
3634 	return (DDI_SUCCESS);
3635 }
3636 
3637 /*
3638  * Statically allocate Tx buffer list(s).
3639  */
3640 static int
ibd_init_txlist(ibd_state_t * state)3641 ibd_init_txlist(ibd_state_t *state)
3642 {
3643 	ibd_swqe_t *swqe;
3644 	ibt_lkey_t lkey;
3645 	int i;
3646 	uint_t len;
3647 	uint8_t *bufaddr;
3648 
3649 	if (ibd_alloc_tx_copybufs(state) != DDI_SUCCESS)
3650 		return (DDI_FAILURE);
3651 
3652 	if (state->id_lso_policy && state->id_lso_capable) {
3653 		if (ibd_alloc_tx_lsobufs(state) != DDI_SUCCESS)
3654 			state->id_lso_capable = B_FALSE;
3655 	}
3656 
3657 	mutex_enter(&state->id_tx_list.dl_mutex);
3658 	state->id_tx_list.dl_head = NULL;
3659 	state->id_tx_list.dl_pending_sends = B_FALSE;
3660 	state->id_tx_list.dl_cnt = 0;
3661 	mutex_exit(&state->id_tx_list.dl_mutex);
3662 	mutex_enter(&state->id_tx_rel_list.dl_mutex);
3663 	state->id_tx_rel_list.dl_head = NULL;
3664 	state->id_tx_rel_list.dl_pending_sends = B_FALSE;
3665 	state->id_tx_rel_list.dl_cnt = 0;
3666 	mutex_exit(&state->id_tx_rel_list.dl_mutex);
3667 
3668 	/*
3669 	 * Allocate and setup the swqe list
3670 	 */
3671 	lkey = state->id_tx_mr_desc.md_lkey;
3672 	bufaddr = state->id_tx_bufs;
3673 	len = state->id_tx_buf_sz;
3674 	swqe = state->id_tx_wqes;
3675 	mutex_enter(&state->id_tx_list.dl_mutex);
3676 	for (i = 0; i < state->id_ud_num_swqe; i++, swqe++, bufaddr += len) {
3677 		swqe->swqe_next = NULL;
3678 		swqe->swqe_im_mblk = NULL;
3679 
3680 		swqe->swqe_copybuf.ic_sgl.ds_va = (ib_vaddr_t)(uintptr_t)
3681 		    bufaddr;
3682 		swqe->swqe_copybuf.ic_sgl.ds_key = lkey;
3683 		swqe->swqe_copybuf.ic_sgl.ds_len = 0; /* set in send */
3684 
3685 		swqe->w_swr.wr_id = (ibt_wrid_t)(uintptr_t)swqe;
3686 		swqe->w_swr.wr_flags = IBT_WR_NO_FLAGS;
3687 		swqe->w_swr.wr_trans = IBT_UD_SRV;
3688 
3689 		/* These are set in send */
3690 		swqe->w_swr.wr_nds = 0;
3691 		swqe->w_swr.wr_sgl = NULL;
3692 		swqe->w_swr.wr_opcode = IBT_WRC_SEND;
3693 
3694 		/* add to list */
3695 		state->id_tx_list.dl_cnt++;
3696 		swqe->swqe_next = state->id_tx_list.dl_head;
3697 		state->id_tx_list.dl_head = SWQE_TO_WQE(swqe);
3698 	}
3699 	mutex_exit(&state->id_tx_list.dl_mutex);
3700 
3701 	return (DDI_SUCCESS);
3702 }
3703 
3704 static int
ibd_acquire_lsobufs(ibd_state_t * state,uint_t req_sz,ibt_wr_ds_t * sgl_p,uint32_t * nds_p)3705 ibd_acquire_lsobufs(ibd_state_t *state, uint_t req_sz, ibt_wr_ds_t *sgl_p,
3706     uint32_t *nds_p)
3707 {
3708 	ibd_lsobkt_t *bktp;
3709 	ibd_lsobuf_t *lbufp;
3710 	ibd_lsobuf_t *nextp;
3711 	ibt_lkey_t lso_lkey;
3712 	uint_t frag_sz;
3713 	uint_t num_needed;
3714 	int i;
3715 
3716 	ASSERT(sgl_p != NULL);
3717 	ASSERT(nds_p != NULL);
3718 	ASSERT(req_sz != 0);
3719 
3720 	/*
3721 	 * Determine how many bufs we'd need for the size requested
3722 	 */
3723 	num_needed = req_sz / IBD_LSO_BUFSZ;
3724 	if ((frag_sz = req_sz % IBD_LSO_BUFSZ) != 0)
3725 		num_needed++;
3726 
3727 	mutex_enter(&state->id_lso_lock);
3728 
3729 	/*
3730 	 * If we don't have enough lso bufs, return failure
3731 	 */
3732 	ASSERT(state->id_lso != NULL);
3733 	bktp = state->id_lso;
3734 	if (bktp->bkt_nfree < num_needed) {
3735 		mutex_exit(&state->id_lso_lock);
3736 		return (-1);
3737 	}
3738 
3739 	/*
3740 	 * Pick the first 'num_needed' bufs from the free list
3741 	 */
3742 	lso_lkey = bktp->bkt_mr_desc.md_lkey;
3743 	lbufp = bktp->bkt_free_head;
3744 	for (i = 0; i < num_needed; i++) {
3745 		ASSERT(lbufp->lb_isfree != 0);
3746 		ASSERT(lbufp->lb_buf != NULL);
3747 
3748 		nextp = lbufp->lb_next;
3749 
3750 		sgl_p[i].ds_va = (ib_vaddr_t)(uintptr_t)lbufp->lb_buf;
3751 		sgl_p[i].ds_key = lso_lkey;
3752 		sgl_p[i].ds_len = IBD_LSO_BUFSZ;
3753 
3754 		lbufp->lb_isfree = 0;
3755 		lbufp->lb_next = NULL;
3756 
3757 		lbufp = nextp;
3758 	}
3759 	bktp->bkt_free_head = lbufp;
3760 
3761 	/*
3762 	 * If the requested size is not a multiple of IBD_LSO_BUFSZ, we need
3763 	 * to adjust the last sgl entry's length. Since we know we need atleast
3764 	 * one, the i-1 use below is ok.
3765 	 */
3766 	if (frag_sz) {
3767 		sgl_p[i-1].ds_len = frag_sz;
3768 	}
3769 
3770 	/*
3771 	 * Update nfree count and return
3772 	 */
3773 	bktp->bkt_nfree -= num_needed;
3774 
3775 	mutex_exit(&state->id_lso_lock);
3776 
3777 	*nds_p = num_needed;
3778 
3779 	return (0);
3780 }
3781 
3782 static void
ibd_release_lsobufs(ibd_state_t * state,ibt_wr_ds_t * sgl_p,uint32_t nds)3783 ibd_release_lsobufs(ibd_state_t *state, ibt_wr_ds_t *sgl_p, uint32_t nds)
3784 {
3785 	ibd_lsobkt_t *bktp;
3786 	ibd_lsobuf_t *lbufp;
3787 	uint8_t *lso_mem_end;
3788 	uint_t ndx;
3789 	int i;
3790 
3791 	mutex_enter(&state->id_lso_lock);
3792 
3793 	bktp = state->id_lso;
3794 	ASSERT(bktp != NULL);
3795 
3796 	lso_mem_end = bktp->bkt_mem + bktp->bkt_nelem * IBD_LSO_BUFSZ;
3797 	for (i = 0; i < nds; i++) {
3798 		uint8_t *va;
3799 
3800 		va = (uint8_t *)(uintptr_t)sgl_p[i].ds_va;
3801 		ASSERT(va >= bktp->bkt_mem && va < lso_mem_end);
3802 
3803 		/*
3804 		 * Figure out the buflist element this sgl buffer corresponds
3805 		 * to and put it back at the head
3806 		 */
3807 		ndx = (va - bktp->bkt_mem) / IBD_LSO_BUFSZ;
3808 		lbufp = bktp->bkt_bufl + ndx;
3809 
3810 		ASSERT(lbufp->lb_isfree == 0);
3811 		ASSERT(lbufp->lb_buf == va);
3812 
3813 		lbufp->lb_isfree = 1;
3814 		lbufp->lb_next = bktp->bkt_free_head;
3815 		bktp->bkt_free_head = lbufp;
3816 	}
3817 	bktp->bkt_nfree += nds;
3818 
3819 	mutex_exit(&state->id_lso_lock);
3820 }
3821 
3822 static void
ibd_free_tx_copybufs(ibd_state_t * state)3823 ibd_free_tx_copybufs(ibd_state_t *state)
3824 {
3825 	/*
3826 	 * Unregister txbuf mr
3827 	 */
3828 	if (ibt_deregister_mr(state->id_hca_hdl,
3829 	    state->id_tx_mr_hdl) != IBT_SUCCESS) {
3830 		DPRINT(10, "ibd_free_tx_copybufs: ibt_deregister_mr failed");
3831 	}
3832 	state->id_tx_mr_hdl = NULL;
3833 
3834 	/*
3835 	 * Free txbuf memory
3836 	 */
3837 	kmem_free(state->id_tx_wqes, state->id_ud_num_swqe *
3838 	    sizeof (ibd_swqe_t));
3839 	kmem_free(state->id_tx_bufs, state->id_ud_num_swqe *
3840 	    state->id_tx_buf_sz);
3841 	state->id_tx_wqes = NULL;
3842 	state->id_tx_bufs = NULL;
3843 }
3844 
3845 static void
ibd_free_tx_lsobufs(ibd_state_t * state)3846 ibd_free_tx_lsobufs(ibd_state_t *state)
3847 {
3848 	ibd_lsobkt_t *bktp;
3849 
3850 	mutex_enter(&state->id_lso_lock);
3851 
3852 	if ((bktp = state->id_lso) == NULL) {
3853 		mutex_exit(&state->id_lso_lock);
3854 		return;
3855 	}
3856 
3857 	/*
3858 	 * First, free the buflist
3859 	 */
3860 	ASSERT(bktp->bkt_bufl != NULL);
3861 	kmem_free(bktp->bkt_bufl, bktp->bkt_nelem * sizeof (ibd_lsobuf_t));
3862 
3863 	/*
3864 	 * Unregister the LSO memory and free it
3865 	 */
3866 	ASSERT(bktp->bkt_mr_hdl != NULL);
3867 	if (ibt_deregister_mr(state->id_hca_hdl,
3868 	    bktp->bkt_mr_hdl) != IBT_SUCCESS) {
3869 		DPRINT(10,
3870 		    "ibd_free_lsobufs: ibt_deregister_mr failed");
3871 	}
3872 	ASSERT(bktp->bkt_mem);
3873 	kmem_free(bktp->bkt_mem, bktp->bkt_nelem * IBD_LSO_BUFSZ);
3874 
3875 	/*
3876 	 * Finally free the bucket
3877 	 */
3878 	kmem_free(bktp, sizeof (ibd_lsobkt_t));
3879 	state->id_lso = NULL;
3880 
3881 	mutex_exit(&state->id_lso_lock);
3882 }
3883 
3884 /*
3885  * Free the statically allocated Tx buffer list.
3886  */
3887 static void
ibd_fini_txlist(ibd_state_t * state)3888 ibd_fini_txlist(ibd_state_t *state)
3889 {
3890 	/*
3891 	 * Free the allocated swqes
3892 	 */
3893 	mutex_enter(&state->id_tx_list.dl_mutex);
3894 	mutex_enter(&state->id_tx_rel_list.dl_mutex);
3895 	state->id_tx_list.dl_head = NULL;
3896 	state->id_tx_list.dl_pending_sends = B_FALSE;
3897 	state->id_tx_list.dl_cnt = 0;
3898 	state->id_tx_rel_list.dl_head = NULL;
3899 	state->id_tx_rel_list.dl_pending_sends = B_FALSE;
3900 	state->id_tx_rel_list.dl_cnt = 0;
3901 	mutex_exit(&state->id_tx_rel_list.dl_mutex);
3902 	mutex_exit(&state->id_tx_list.dl_mutex);
3903 
3904 	ibd_free_tx_lsobufs(state);
3905 	ibd_free_tx_copybufs(state);
3906 }
3907 
3908 /*
3909  * post a list of rwqes, NULL terminated.
3910  */
3911 static void
ibd_post_recv_list(ibd_state_t * state,ibd_rwqe_t * rwqe)3912 ibd_post_recv_list(ibd_state_t *state, ibd_rwqe_t *rwqe)
3913 {
3914 	uint_t		i;
3915 	uint_t		num_posted;
3916 	ibt_status_t	ibt_status;
3917 	ibt_recv_wr_t	wrs[IBD_RX_POST_CNT];
3918 
3919 	while (rwqe) {
3920 		/* Post up to IBD_RX_POST_CNT receive work requests */
3921 		for (i = 0; i < IBD_RX_POST_CNT; i++) {
3922 			wrs[i] = rwqe->w_rwr;
3923 			rwqe = WQE_TO_RWQE(rwqe->rwqe_next);
3924 			if (rwqe == NULL) {
3925 				i++;
3926 				break;
3927 			}
3928 		}
3929 
3930 		/*
3931 		 * If posting fails for some reason, we'll never receive
3932 		 * completion intimation, so we'll need to cleanup. But
3933 		 * we need to make sure we don't clean up nodes whose
3934 		 * wrs have been successfully posted. We assume that the
3935 		 * hca driver returns on the first failure to post and
3936 		 * therefore the first 'num_posted' entries don't need
3937 		 * cleanup here.
3938 		 */
3939 		atomic_add_32(&state->id_rx_list.dl_cnt, i);
3940 
3941 		num_posted = 0;
3942 		ibt_status = ibt_post_recv(state->id_chnl_hdl, wrs, i,
3943 		    &num_posted);
3944 		if (ibt_status != IBT_SUCCESS) {
3945 			/* This cannot happen unless the device has an error. */
3946 			ibd_print_warn(state, "ibd_post_recv: FATAL: "
3947 			    "posting multiple wrs failed: "
3948 			    "requested=%d, done=%d, ret=%d",
3949 			    IBD_RX_POST_CNT, num_posted, ibt_status);
3950 			atomic_add_32(&state->id_rx_list.dl_cnt,
3951 			    num_posted - i);
3952 		}
3953 	}
3954 }
3955 
3956 /*
3957  * Grab a list of rwqes from the array of lists, and post the list.
3958  */
3959 static void
ibd_post_recv_intr(ibd_state_t * state)3960 ibd_post_recv_intr(ibd_state_t *state)
3961 {
3962 	ibd_rx_queue_t	*rxp;
3963 	ibd_rwqe_t *list;
3964 
3965 	/* rotate through the rx_queue array, expecting an adequate number */
3966 	state->id_rx_post_queue_index =
3967 	    (state->id_rx_post_queue_index + 1) &
3968 	    (state->id_rx_nqueues - 1);
3969 
3970 	rxp = state->id_rx_queues + state->id_rx_post_queue_index;
3971 	mutex_enter(&rxp->rx_post_lock);
3972 	list = WQE_TO_RWQE(rxp->rx_head);
3973 	rxp->rx_head = NULL;
3974 	rxp->rx_cnt = 0;
3975 	mutex_exit(&rxp->rx_post_lock);
3976 	ibd_post_recv_list(state, list);
3977 }
3978 
3979 /* macro explained below */
3980 #define	RX_QUEUE_HASH(rwqe) \
3981 	(((uintptr_t)(rwqe) >> 8) & (state->id_rx_nqueues - 1))
3982 
3983 /*
3984  * Add a rwqe to one of the the Rx lists.  If the list is large enough
3985  * (exactly IBD_RX_POST_CNT), post the list to the hardware.
3986  *
3987  * Note: one of 2^N lists is chosen via a hash.  This is done
3988  * because using one list is contentious.  If the first list is busy
3989  * (mutex_tryenter fails), use a second list (just call mutex_enter).
3990  *
3991  * The number 8 in RX_QUEUE_HASH is a random choice that provides
3992  * even distribution of mapping rwqes to the 2^N queues.
3993  */
3994 static void
ibd_post_recv(ibd_state_t * state,ibd_rwqe_t * rwqe)3995 ibd_post_recv(ibd_state_t *state, ibd_rwqe_t *rwqe)
3996 {
3997 	ibd_rx_queue_t	*rxp;
3998 
3999 	rxp = state->id_rx_queues + RX_QUEUE_HASH(rwqe);
4000 
4001 	if (!mutex_tryenter(&rxp->rx_post_lock)) {
4002 		/* Failed.  Try a different queue ("ptr + 16" ensures that). */
4003 		rxp = state->id_rx_queues + RX_QUEUE_HASH(rwqe + 16);
4004 		mutex_enter(&rxp->rx_post_lock);
4005 	}
4006 	rwqe->rwqe_next = rxp->rx_head;
4007 	if (++rxp->rx_cnt >= IBD_RX_POST_CNT - 2) {
4008 		uint_t active = atomic_inc_32_nv(&state->id_rx_post_active);
4009 
4010 		/* only call ibt_post_recv() every Nth time through here */
4011 		if ((active & (state->id_rx_nqueues - 1)) == 0) {
4012 			rxp->rx_head = NULL;
4013 			rxp->rx_cnt = 0;
4014 			mutex_exit(&rxp->rx_post_lock);
4015 			ibd_post_recv_list(state, rwqe);
4016 			return;
4017 		}
4018 	}
4019 	rxp->rx_head = RWQE_TO_WQE(rwqe);
4020 	mutex_exit(&rxp->rx_post_lock);
4021 }
4022 
4023 static int
ibd_alloc_rx_copybufs(ibd_state_t * state)4024 ibd_alloc_rx_copybufs(ibd_state_t *state)
4025 {
4026 	ibt_mr_attr_t mem_attr;
4027 	int i;
4028 
4029 	/*
4030 	 * Allocate one big chunk for all regular rx copy bufs
4031 	 */
4032 	state->id_rx_buf_sz = state->id_mtu + IPOIB_GRH_SIZE;
4033 
4034 	state->id_rx_bufs = kmem_zalloc(state->id_ud_num_rwqe *
4035 	    state->id_rx_buf_sz, KM_SLEEP);
4036 
4037 	state->id_rx_wqes = kmem_zalloc(state->id_ud_num_rwqe *
4038 	    sizeof (ibd_rwqe_t), KM_SLEEP);
4039 
4040 	state->id_rx_nqueues = 1 << IBD_LOG_RX_POST;
4041 	state->id_rx_queues = kmem_zalloc(state->id_rx_nqueues *
4042 	    sizeof (ibd_rx_queue_t), KM_SLEEP);
4043 	for (i = 0; i < state->id_rx_nqueues; i++) {
4044 		ibd_rx_queue_t *rxp = state->id_rx_queues + i;
4045 		mutex_init(&rxp->rx_post_lock, NULL, MUTEX_DRIVER, NULL);
4046 	}
4047 
4048 	/*
4049 	 * Do one memory registration on the entire rxbuf area
4050 	 */
4051 	mem_attr.mr_vaddr = (uint64_t)(uintptr_t)state->id_rx_bufs;
4052 	mem_attr.mr_len = state->id_ud_num_rwqe * state->id_rx_buf_sz;
4053 	mem_attr.mr_as = NULL;
4054 	mem_attr.mr_flags = IBT_MR_SLEEP | IBT_MR_ENABLE_LOCAL_WRITE;
4055 	if (ibt_register_mr(state->id_hca_hdl, state->id_pd_hdl, &mem_attr,
4056 	    &state->id_rx_mr_hdl, &state->id_rx_mr_desc) != IBT_SUCCESS) {
4057 		DPRINT(10, "ibd_alloc_rx_copybufs: ibt_register_mr failed");
4058 		kmem_free(state->id_rx_wqes,
4059 		    state->id_ud_num_rwqe * sizeof (ibd_rwqe_t));
4060 		kmem_free(state->id_rx_bufs,
4061 		    state->id_ud_num_rwqe * state->id_rx_buf_sz);
4062 		state->id_rx_bufs = NULL;
4063 		state->id_rx_wqes = NULL;
4064 		return (DDI_FAILURE);
4065 	}
4066 
4067 	return (DDI_SUCCESS);
4068 }
4069 
4070 /*
4071  * Allocate the statically allocated Rx buffer list.
4072  */
4073 static int
ibd_init_rxlist(ibd_state_t * state)4074 ibd_init_rxlist(ibd_state_t *state)
4075 {
4076 	ibd_rwqe_t *rwqe, *next;
4077 	ibd_wqe_t *list;
4078 	ibt_lkey_t lkey;
4079 	int i;
4080 	uint_t len;
4081 	uint8_t *bufaddr;
4082 
4083 	mutex_enter(&state->id_rx_free_list.dl_mutex);
4084 	if (state->id_rx_free_list.dl_head != NULL) {
4085 		/* rx rsrcs were never freed.  Just repost them */
4086 		len = state->id_rx_buf_sz;
4087 		list = state->id_rx_free_list.dl_head;
4088 		state->id_rx_free_list.dl_head = NULL;
4089 		state->id_rx_free_list.dl_cnt = 0;
4090 		mutex_exit(&state->id_rx_free_list.dl_mutex);
4091 		for (rwqe = WQE_TO_RWQE(list); rwqe != NULL;
4092 		    rwqe = WQE_TO_RWQE(rwqe->rwqe_next)) {
4093 			if ((rwqe->rwqe_im_mblk = desballoc(
4094 			    rwqe->rwqe_copybuf.ic_bufaddr, len, 0,
4095 			    &rwqe->w_freemsg_cb)) == NULL) {
4096 				/* allow freemsg_cb to free the rwqes */
4097 				if (atomic_dec_32_nv(&state->id_running) != 0) {
4098 					cmn_err(CE_WARN, "ibd_init_rxlist: "
4099 					    "id_running was not 1\n");
4100 				}
4101 				DPRINT(10, "ibd_init_rxlist : "
4102 				    "failed in desballoc()");
4103 				for (rwqe = WQE_TO_RWQE(list); rwqe != NULL;
4104 				    rwqe = next) {
4105 					next = WQE_TO_RWQE(rwqe->rwqe_next);
4106 					if (rwqe->rwqe_im_mblk) {
4107 						atomic_inc_32(&state->
4108 						    id_rx_list.
4109 						    dl_bufs_outstanding);
4110 						freemsg(rwqe->rwqe_im_mblk);
4111 					} else
4112 						ibd_free_rwqe(state, rwqe);
4113 				}
4114 				atomic_inc_32(&state->id_running);
4115 				return (DDI_FAILURE);
4116 			}
4117 		}
4118 		ibd_post_recv_list(state, WQE_TO_RWQE(list));
4119 		return (DDI_SUCCESS);
4120 	}
4121 	mutex_exit(&state->id_rx_free_list.dl_mutex);
4122 
4123 	if (ibd_alloc_rx_copybufs(state) != DDI_SUCCESS)
4124 		return (DDI_FAILURE);
4125 
4126 	/*
4127 	 * Allocate and setup the rwqe list
4128 	 */
4129 	len = state->id_rx_buf_sz;
4130 	lkey = state->id_rx_mr_desc.md_lkey;
4131 	rwqe = state->id_rx_wqes;
4132 	bufaddr = state->id_rx_bufs;
4133 	list = NULL;
4134 	for (i = 0; i < state->id_ud_num_rwqe; i++, rwqe++, bufaddr += len) {
4135 		rwqe->w_state = state;
4136 		rwqe->w_freemsg_cb.free_func = ibd_freemsg_cb;
4137 		rwqe->w_freemsg_cb.free_arg = (char *)rwqe;
4138 
4139 		rwqe->rwqe_copybuf.ic_bufaddr = bufaddr;
4140 
4141 		if ((rwqe->rwqe_im_mblk = desballoc(bufaddr, len, 0,
4142 		    &rwqe->w_freemsg_cb)) == NULL) {
4143 			DPRINT(10, "ibd_init_rxlist : failed in desballoc()");
4144 			/* allow freemsg_cb to free the rwqes */
4145 			if (atomic_dec_32_nv(&state->id_running) != 0) {
4146 				cmn_err(CE_WARN, "ibd_init_rxlist: "
4147 				    "id_running was not 1\n");
4148 			}
4149 			DPRINT(10, "ibd_init_rxlist : "
4150 			    "failed in desballoc()");
4151 			for (rwqe = WQE_TO_RWQE(list); rwqe != NULL;
4152 			    rwqe = next) {
4153 				next = WQE_TO_RWQE(rwqe->rwqe_next);
4154 				freemsg(rwqe->rwqe_im_mblk);
4155 			}
4156 			atomic_inc_32(&state->id_running);
4157 
4158 			/* remove reference to free'd rwqes */
4159 			mutex_enter(&state->id_rx_free_list.dl_mutex);
4160 			state->id_rx_free_list.dl_head = NULL;
4161 			state->id_rx_free_list.dl_cnt = 0;
4162 			mutex_exit(&state->id_rx_free_list.dl_mutex);
4163 
4164 			ibd_fini_rxlist(state);
4165 			return (DDI_FAILURE);
4166 		}
4167 
4168 		rwqe->rwqe_copybuf.ic_sgl.ds_key = lkey;
4169 		rwqe->rwqe_copybuf.ic_sgl.ds_va =
4170 		    (ib_vaddr_t)(uintptr_t)bufaddr;
4171 		rwqe->rwqe_copybuf.ic_sgl.ds_len = len;
4172 		rwqe->w_rwr.wr_id = (ibt_wrid_t)(uintptr_t)rwqe;
4173 		rwqe->w_rwr.wr_nds = 1;
4174 		rwqe->w_rwr.wr_sgl = &rwqe->rwqe_copybuf.ic_sgl;
4175 
4176 		rwqe->rwqe_next = list;
4177 		list = RWQE_TO_WQE(rwqe);
4178 	}
4179 	ibd_post_recv_list(state, WQE_TO_RWQE(list));
4180 
4181 	return (DDI_SUCCESS);
4182 }
4183 
4184 static void
ibd_free_rx_copybufs(ibd_state_t * state)4185 ibd_free_rx_copybufs(ibd_state_t *state)
4186 {
4187 	int i;
4188 
4189 	/*
4190 	 * Unregister rxbuf mr
4191 	 */
4192 	if (ibt_deregister_mr(state->id_hca_hdl,
4193 	    state->id_rx_mr_hdl) != IBT_SUCCESS) {
4194 		DPRINT(10, "ibd_free_rx_copybufs: ibt_deregister_mr failed");
4195 	}
4196 	state->id_rx_mr_hdl = NULL;
4197 
4198 	/*
4199 	 * Free rxbuf memory
4200 	 */
4201 	for (i = 0; i < state->id_rx_nqueues; i++) {
4202 		ibd_rx_queue_t *rxp = state->id_rx_queues + i;
4203 		mutex_destroy(&rxp->rx_post_lock);
4204 	}
4205 	kmem_free(state->id_rx_queues, state->id_rx_nqueues *
4206 	    sizeof (ibd_rx_queue_t));
4207 	kmem_free(state->id_rx_wqes, state->id_ud_num_rwqe *
4208 	    sizeof (ibd_rwqe_t));
4209 	kmem_free(state->id_rx_bufs, state->id_ud_num_rwqe *
4210 	    state->id_rx_buf_sz);
4211 	state->id_rx_queues = NULL;
4212 	state->id_rx_wqes = NULL;
4213 	state->id_rx_bufs = NULL;
4214 }
4215 
4216 static void
ibd_free_rx_rsrcs(ibd_state_t * state)4217 ibd_free_rx_rsrcs(ibd_state_t *state)
4218 {
4219 	mutex_enter(&state->id_rx_free_list.dl_mutex);
4220 	if (state->id_rx_free_list.dl_head == NULL) {
4221 		/* already freed */
4222 		mutex_exit(&state->id_rx_free_list.dl_mutex);
4223 		return;
4224 	}
4225 	ASSERT(state->id_rx_free_list.dl_cnt == state->id_ud_num_rwqe);
4226 	ibd_free_rx_copybufs(state);
4227 	state->id_rx_free_list.dl_cnt = 0;
4228 	state->id_rx_free_list.dl_head = NULL;
4229 	mutex_exit(&state->id_rx_free_list.dl_mutex);
4230 }
4231 
4232 /*
4233  * Free the statically allocated Rx buffer list.
4234  */
4235 static void
ibd_fini_rxlist(ibd_state_t * state)4236 ibd_fini_rxlist(ibd_state_t *state)
4237 {
4238 	ibd_rwqe_t *rwqe;
4239 	int i;
4240 
4241 	/* run through the rx_queue's, calling freemsg() */
4242 	for (i = 0; i < state->id_rx_nqueues; i++) {
4243 		ibd_rx_queue_t *rxp = state->id_rx_queues + i;
4244 		mutex_enter(&rxp->rx_post_lock);
4245 		for (rwqe = WQE_TO_RWQE(rxp->rx_head); rwqe;
4246 		    rwqe = WQE_TO_RWQE(rwqe->rwqe_next)) {
4247 			freemsg(rwqe->rwqe_im_mblk);
4248 			rxp->rx_cnt--;
4249 		}
4250 		rxp->rx_head = NULL;
4251 		mutex_exit(&rxp->rx_post_lock);
4252 	}
4253 
4254 	/* cannot free rx resources unless gld returned everything */
4255 	if (atomic_add_32_nv(&state->id_rx_list.dl_bufs_outstanding, 0) == 0)
4256 		ibd_free_rx_rsrcs(state);
4257 }
4258 
4259 /*
4260  * Free an allocated recv wqe.
4261  */
4262 /* ARGSUSED */
4263 static void
ibd_free_rwqe(ibd_state_t * state,ibd_rwqe_t * rwqe)4264 ibd_free_rwqe(ibd_state_t *state, ibd_rwqe_t *rwqe)
4265 {
4266 	/*
4267 	 * desballoc() failed (no memory).
4268 	 *
4269 	 * This rwqe is placed on a free list so that it
4270 	 * can be reinstated when memory is available.
4271 	 *
4272 	 * NOTE: no code currently exists to reinstate
4273 	 * these "lost" rwqes.
4274 	 */
4275 	mutex_enter(&state->id_rx_free_list.dl_mutex);
4276 	state->id_rx_free_list.dl_cnt++;
4277 	rwqe->rwqe_next = state->id_rx_free_list.dl_head;
4278 	state->id_rx_free_list.dl_head = RWQE_TO_WQE(rwqe);
4279 	mutex_exit(&state->id_rx_free_list.dl_mutex);
4280 }
4281 
4282 /*
4283  * IBA Rx completion queue handler. Guaranteed to be single
4284  * threaded and nonreentrant for this CQ.
4285  */
4286 /* ARGSUSED */
4287 static void
ibd_rcq_handler(ibt_cq_hdl_t cq_hdl,void * arg)4288 ibd_rcq_handler(ibt_cq_hdl_t cq_hdl, void *arg)
4289 {
4290 	ibd_state_t *state = (ibd_state_t *)arg;
4291 
4292 	atomic_inc_64(&state->id_num_intrs);
4293 
4294 	if (ibd_rx_softintr == 1) {
4295 		mutex_enter(&state->id_rcq_poll_lock);
4296 		if (state->id_rcq_poll_busy & IBD_CQ_POLLING) {
4297 			state->id_rcq_poll_busy |= IBD_REDO_CQ_POLLING;
4298 			mutex_exit(&state->id_rcq_poll_lock);
4299 			return;
4300 		} else {
4301 			mutex_exit(&state->id_rcq_poll_lock);
4302 			ddi_trigger_softintr(state->id_rx);
4303 		}
4304 	} else
4305 		(void) ibd_intr((caddr_t)state);
4306 }
4307 
4308 /*
4309  * CQ handler for Tx completions, when the Tx CQ is in
4310  * interrupt driven mode.
4311  */
4312 /* ARGSUSED */
4313 static void
ibd_scq_handler(ibt_cq_hdl_t cq_hdl,void * arg)4314 ibd_scq_handler(ibt_cq_hdl_t cq_hdl, void *arg)
4315 {
4316 	ibd_state_t *state = (ibd_state_t *)arg;
4317 
4318 	atomic_inc_64(&state->id_num_intrs);
4319 
4320 	if (ibd_tx_softintr == 1) {
4321 		mutex_enter(&state->id_scq_poll_lock);
4322 		if (state->id_scq_poll_busy & IBD_CQ_POLLING) {
4323 			state->id_scq_poll_busy |= IBD_REDO_CQ_POLLING;
4324 			mutex_exit(&state->id_scq_poll_lock);
4325 			return;
4326 		} else {
4327 			mutex_exit(&state->id_scq_poll_lock);
4328 			ddi_trigger_softintr(state->id_tx);
4329 		}
4330 	} else
4331 		(void) ibd_tx_recycle((caddr_t)state);
4332 }
4333 
4334 /*
4335  * Multicast group create/delete trap handler. These will be delivered
4336  * on a kernel thread (handling can thus block) and can be invoked
4337  * concurrently. The handler can be invoked anytime after it is
4338  * registered and before ibt_detach().
4339  */
4340 /* ARGSUSED */
4341 static void
ibd_snet_notices_handler(void * arg,ib_gid_t gid,ibt_subnet_event_code_t code,ibt_subnet_event_t * event)4342 ibd_snet_notices_handler(void *arg, ib_gid_t gid, ibt_subnet_event_code_t code,
4343     ibt_subnet_event_t *event)
4344 {
4345 	ibd_state_t *state = (ibd_state_t *)arg;
4346 	ibd_req_t *req;
4347 
4348 	/*
4349 	 * The trap handler will get invoked once for every event for
4350 	 * every port. The input "gid" is the GID0 of the port the
4351 	 * trap came in on; we just need to act on traps that came
4352 	 * to our port, meaning the port on which the ipoib interface
4353 	 * resides. Since ipoib uses GID0 of the port, we just match
4354 	 * the gids to check whether we need to handle the trap.
4355 	 */
4356 	_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(state->id_sgid))
4357 	if (bcmp(&gid, &state->id_sgid, sizeof (ib_gid_t)) != 0)
4358 		return;
4359 	_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(state->id_sgid))
4360 
4361 	DPRINT(10, "ibd_notices_handler : %d\n", code);
4362 
4363 	switch (code) {
4364 		case IBT_SM_EVENT_UNAVAILABLE:
4365 			/*
4366 			 * If we are in promiscuous mode or have
4367 			 * sendnonmembers, we need to print a warning
4368 			 * message right now. Else, just store the
4369 			 * information, print when we enter promiscuous
4370 			 * mode or attempt nonmember send. We might
4371 			 * also want to stop caching sendnonmember.
4372 			 */
4373 			ibd_print_warn(state, "IBA multicast support "
4374 			    "degraded due to unavailability of multicast "
4375 			    "traps");
4376 			break;
4377 		case IBT_SM_EVENT_AVAILABLE:
4378 			/*
4379 			 * If we printed a warning message above or
4380 			 * while trying to nonmember send or get into
4381 			 * promiscuous mode, print an okay message.
4382 			 */
4383 			ibd_print_warn(state, "IBA multicast support "
4384 			    "restored due to availability of multicast "
4385 			    "traps");
4386 			break;
4387 		case IBT_SM_EVENT_MCG_CREATED:
4388 		case IBT_SM_EVENT_MCG_DELETED:
4389 			/*
4390 			 * If it is a "deleted" event and we are in late hca
4391 			 * init, nothing to do.
4392 			 */
4393 			if (((state->id_mac_state & IBD_DRV_IN_LATE_HCA_INIT) ==
4394 			    IBD_DRV_IN_LATE_HCA_INIT) && (code ==
4395 			    IBT_SM_EVENT_MCG_DELETED)) {
4396 				break;
4397 			}
4398 			/*
4399 			 * Common processing of creation/deletion traps.
4400 			 * First check if the instance is being
4401 			 * [de]initialized; back off then, without doing
4402 			 * anything more, since we are not sure if the
4403 			 * async thread is around, or whether we might
4404 			 * be racing with the detach code in ibd_m_stop()
4405 			 * that scans the mcg list.
4406 			 */
4407 			if (!ibd_async_safe(state))
4408 				return;
4409 
4410 			req = kmem_cache_alloc(state->id_req_kmc, KM_SLEEP);
4411 			req->rq_gid = event->sm_notice_gid;
4412 			req->rq_ptr = (void *)code;
4413 			ibd_queue_work_slot(state, req, IBD_ASYNC_TRAP);
4414 			break;
4415 	}
4416 }
4417 
4418 static void
ibd_async_trap(ibd_state_t * state,ibd_req_t * req)4419 ibd_async_trap(ibd_state_t *state, ibd_req_t *req)
4420 {
4421 	ib_gid_t mgid = req->rq_gid;
4422 	ibt_subnet_event_code_t code = (ibt_subnet_event_code_t)req->rq_ptr;
4423 	int ret;
4424 	ib_pkey_t pkey = (mgid.gid_prefix >> 16) & 0xffff;
4425 
4426 	DPRINT(10, "ibd_async_trap : %d\n", code);
4427 
4428 	/*
4429 	 * Check if we have already joined the IPoIB broadcast group for our
4430 	 * PKEY. If joined, perform the rest of the operation.
4431 	 * Else, the interface is not initialised. Do the initialisation here
4432 	 * by calling ibd_start() and return.
4433 	 */
4434 
4435 	if (((state->id_mac_state & IBD_DRV_IN_LATE_HCA_INIT) ==
4436 	    IBD_DRV_IN_LATE_HCA_INIT) && (state->id_bgroup_present == 0) &&
4437 	    (code == IBT_SM_EVENT_MCG_CREATED)) {
4438 		/*
4439 		 * If we are in late HCA init and a notification for the
4440 		 * creation of a MCG came in, check if it is the IPoIB MCG for
4441 		 * this pkey. If not, return.
4442 		 */
4443 		if ((mgid.gid_guid != IB_MGID_IPV4_LOWGRP_MASK) || (pkey !=
4444 		    state->id_pkey)) {
4445 			ibd_async_done(state);
4446 			return;
4447 		}
4448 		ibd_set_mac_progress(state, IBD_DRV_RESTART_IN_PROGRESS);
4449 		/*
4450 		 * Check if there is still a necessity to start the interface.
4451 		 * It is possible that the user attempted unplumb at just about
4452 		 * the same time, and if unplumb succeeded, we have nothing to
4453 		 * do.
4454 		 */
4455 		if (((state->id_mac_state & IBD_DRV_IN_LATE_HCA_INIT) ==
4456 		    IBD_DRV_IN_LATE_HCA_INIT) &&
4457 		    ((ret = ibd_start(state)) != 0)) {
4458 			DPRINT(10, "ibd_async_trap: cannot start from late HCA "
4459 			    "init, ret=%d", ret);
4460 		}
4461 		ibd_clr_mac_progress(state, IBD_DRV_RESTART_IN_PROGRESS);
4462 		ibd_async_done(state);
4463 		return;
4464 	}
4465 
4466 	/*
4467 	 * Atomically search the nonmember and sendonlymember lists and
4468 	 * delete.
4469 	 */
4470 	ibd_leave_group(state, mgid, IB_MC_JSTATE_SEND_ONLY_NON);
4471 
4472 	if (state->id_prom_op == IBD_OP_COMPLETED) {
4473 		ibd_leave_group(state, mgid, IB_MC_JSTATE_NON);
4474 
4475 		/*
4476 		 * If in promiscuous mode, try to join/attach to the new
4477 		 * mcg. Given the unreliable out-of-order mode of trap
4478 		 * delivery, we can never be sure whether it is a problem
4479 		 * if the join fails. Thus, we warn the admin of a failure
4480 		 * if this was a creation trap. Note that the trap might
4481 		 * actually be reporting a long past event, and the mcg
4482 		 * might already have been deleted, thus we might be warning
4483 		 * in vain.
4484 		 */
4485 		if ((ibd_join_group(state, mgid, IB_MC_JSTATE_NON) ==
4486 		    NULL) && (code == IBT_SM_EVENT_MCG_CREATED))
4487 			ibd_print_warn(state, "IBA promiscuous mode missed "
4488 			    "new multicast gid %016llx:%016llx",
4489 			    (u_longlong_t)mgid.gid_prefix,
4490 			    (u_longlong_t)mgid.gid_guid);
4491 	}
4492 
4493 	/*
4494 	 * Free the request slot allocated by the subnet event thread.
4495 	 */
4496 	ibd_async_done(state);
4497 }
4498 
4499 /*
4500  * GLDv3 entry point to get capabilities.
4501  */
4502 static boolean_t
ibd_m_getcapab(void * arg,mac_capab_t cap,void * cap_data)4503 ibd_m_getcapab(void *arg, mac_capab_t cap, void *cap_data)
4504 {
4505 	ibd_state_t *state = arg;
4506 
4507 	if (state->id_type == IBD_PORT_DRIVER)
4508 		return (B_FALSE);
4509 
4510 	switch (cap) {
4511 	case MAC_CAPAB_HCKSUM: {
4512 		uint32_t *txflags = cap_data;
4513 
4514 		/*
4515 		 * We either do full checksum or not do it at all
4516 		 */
4517 		if (state->id_hwcksum_capab & IBT_HCA_CKSUM_FULL)
4518 			*txflags = HCK_FULLCKSUM | HCKSUM_INET_FULL_V4;
4519 		else
4520 			return (B_FALSE);
4521 		break;
4522 	}
4523 
4524 	case MAC_CAPAB_LSO: {
4525 		mac_capab_lso_t *cap_lso = cap_data;
4526 
4527 		/*
4528 		 * In addition to the capability and policy, since LSO
4529 		 * relies on hw checksum, we'll not enable LSO if we
4530 		 * don't have hw checksum.  Of course, if the HCA doesn't
4531 		 * provide the reserved lkey capability, enabling LSO will
4532 		 * actually affect performance adversely, so we'll disable
4533 		 * LSO even for that case.
4534 		 */
4535 		if (!state->id_lso_policy || !state->id_lso_capable)
4536 			return (B_FALSE);
4537 
4538 		if ((state->id_hwcksum_capab & IBT_HCA_CKSUM_FULL) == 0)
4539 			return (B_FALSE);
4540 
4541 		if (state->id_hca_res_lkey_capab == 0) {
4542 			ibd_print_warn(state, "no reserved-lkey capability, "
4543 			    "disabling LSO");
4544 			return (B_FALSE);
4545 		}
4546 
4547 		cap_lso->lso_flags = LSO_TX_BASIC_TCP_IPV4;
4548 		cap_lso->lso_basic_tcp_ipv4.lso_max = state->id_lso_maxlen - 1;
4549 		break;
4550 	}
4551 
4552 	default:
4553 		return (B_FALSE);
4554 	}
4555 
4556 	return (B_TRUE);
4557 }
4558 
4559 /*
4560  * callback function for set/get of properties
4561  */
4562 static int
ibd_m_setprop(void * arg,const char * pr_name,mac_prop_id_t pr_num,uint_t pr_valsize,const void * pr_val)4563 ibd_m_setprop(void *arg, const char *pr_name, mac_prop_id_t pr_num,
4564     uint_t pr_valsize, const void *pr_val)
4565 {
4566 	ibd_state_t *state = arg;
4567 	int err = 0;
4568 	uint32_t link_mode;
4569 
4570 	/* Cannot set properties on a port driver */
4571 	if (state->id_type == IBD_PORT_DRIVER) {
4572 		return (ENOTSUP);
4573 	}
4574 
4575 	switch (pr_num) {
4576 		case MAC_PROP_IB_LINKMODE:
4577 			if (state->id_mac_state & IBD_DRV_STARTED) {
4578 				err = EBUSY;
4579 				break;
4580 			}
4581 			if (pr_val == NULL) {
4582 				err = EINVAL;
4583 				break;
4584 			}
4585 			bcopy(pr_val, &link_mode, sizeof (link_mode));
4586 			if (link_mode != IBD_LINK_MODE_UD &&
4587 			    link_mode != IBD_LINK_MODE_RC) {
4588 				err = EINVAL;
4589 			} else {
4590 				if (link_mode == IBD_LINK_MODE_RC) {
4591 					if (state->id_enable_rc) {
4592 						return (0);
4593 					}
4594 					state->id_enable_rc = 1;
4595 					/* inform MAC framework of new MTU */
4596 					err = mac_maxsdu_update2(state->id_mh,
4597 					    state->rc_mtu - IPOIB_HDRSIZE,
4598 					    state->id_mtu - IPOIB_HDRSIZE);
4599 				} else {
4600 					if (!state->id_enable_rc) {
4601 						return (0);
4602 					}
4603 					state->id_enable_rc = 0;
4604 					err = mac_maxsdu_update2(state->id_mh,
4605 					    state->id_mtu - IPOIB_HDRSIZE,
4606 					    state->id_mtu - IPOIB_HDRSIZE);
4607 				}
4608 				(void) ibd_record_capab(state);
4609 				mac_capab_update(state->id_mh);
4610 			}
4611 			break;
4612 		case MAC_PROP_PRIVATE:
4613 			err = ibd_set_priv_prop(state, pr_name,
4614 			    pr_valsize, pr_val);
4615 			break;
4616 		default:
4617 			err = ENOTSUP;
4618 			break;
4619 	}
4620 	return (err);
4621 }
4622 
4623 static int
ibd_m_getprop(void * arg,const char * pr_name,mac_prop_id_t pr_num,uint_t pr_valsize,void * pr_val)4624 ibd_m_getprop(void *arg, const char *pr_name, mac_prop_id_t pr_num,
4625     uint_t pr_valsize, void *pr_val)
4626 {
4627 	ibd_state_t *state = arg;
4628 	int err = 0;
4629 
4630 	switch (pr_num) {
4631 		case MAC_PROP_MTU:
4632 			break;
4633 		default:
4634 			if (state->id_type == IBD_PORT_DRIVER) {
4635 				return (ENOTSUP);
4636 			}
4637 			break;
4638 	}
4639 
4640 	switch (pr_num) {
4641 		case MAC_PROP_IB_LINKMODE:
4642 			*(uint_t *)pr_val = state->id_enable_rc;
4643 			break;
4644 		case MAC_PROP_PRIVATE:
4645 			err = ibd_get_priv_prop(state, pr_name, pr_valsize,
4646 			    pr_val);
4647 			break;
4648 		default:
4649 			err = ENOTSUP;
4650 			break;
4651 	}
4652 	return (err);
4653 }
4654 
4655 static void
ibd_m_propinfo(void * arg,const char * pr_name,mac_prop_id_t pr_num,mac_prop_info_handle_t prh)4656 ibd_m_propinfo(void *arg, const char *pr_name, mac_prop_id_t pr_num,
4657     mac_prop_info_handle_t prh)
4658 {
4659 	ibd_state_t *state = arg;
4660 
4661 	switch (pr_num) {
4662 	case MAC_PROP_IB_LINKMODE: {
4663 		mac_prop_info_set_default_uint32(prh, IBD_DEF_LINK_MODE);
4664 		break;
4665 	}
4666 	case MAC_PROP_MTU: {
4667 		uint32_t min, max;
4668 		if (state->id_type == IBD_PORT_DRIVER) {
4669 			min = 1500;
4670 			max = IBD_DEF_RC_MAX_SDU;
4671 		} else if (state->id_enable_rc) {
4672 			min = max = IBD_DEF_RC_MAX_SDU;
4673 		} else {
4674 			min = max = state->id_mtu - IPOIB_HDRSIZE;
4675 		}
4676 		mac_prop_info_set_perm(prh, MAC_PROP_PERM_READ);
4677 		mac_prop_info_set_range_uint32(prh, min, max);
4678 		break;
4679 	}
4680 	case MAC_PROP_PRIVATE: {
4681 		char valstr[64];
4682 		int value;
4683 
4684 		if (strcmp(pr_name, "_ibd_broadcast_group") == 0) {
4685 			mac_prop_info_set_perm(prh, MAC_PROP_PERM_READ);
4686 			return;
4687 		} else if (strcmp(pr_name, "_ibd_coalesce_completions") == 0) {
4688 			value = IBD_DEF_COALESCE_COMPLETIONS;
4689 		} else if (strcmp(pr_name,
4690 		    "_ibd_create_broadcast_group") == 0) {
4691 			value = IBD_DEF_CREATE_BCAST_GROUP;
4692 		} else if (strcmp(pr_name, "_ibd_hash_size") == 0) {
4693 			value = IBD_DEF_HASH_SIZE;
4694 		} else if (strcmp(pr_name, "_ibd_lso_enable") == 0) {
4695 			value = IBD_DEF_LSO_POLICY;
4696 		} else if (strcmp(pr_name, "_ibd_num_ah") == 0) {
4697 			value = IBD_DEF_NUM_AH;
4698 		} else if (strcmp(pr_name, "_ibd_num_lso_bufs") == 0) {
4699 			value = IBD_DEF_NUM_LSO_BUFS;
4700 		} else if (strcmp(pr_name, "_ibd_rc_enable_srq") == 0) {
4701 			value = IBD_DEF_RC_ENABLE_SRQ;
4702 		} else if (strcmp(pr_name, "_ibd_rc_num_rwqe") == 0) {
4703 			value = IBD_DEF_RC_NUM_RWQE;
4704 		} else if (strcmp(pr_name, "_ibd_rc_num_srq") == 0) {
4705 			value = IBD_DEF_RC_NUM_SRQ;
4706 		} else if (strcmp(pr_name, "_ibd_rc_num_swqe") == 0) {
4707 			value = IBD_DEF_RC_NUM_SWQE;
4708 		} else if (strcmp(pr_name, "_ibd_rc_rx_comp_count") == 0) {
4709 			value = IBD_DEF_RC_RX_COMP_COUNT;
4710 		} else if (strcmp(pr_name, "_ibd_rc_rx_comp_usec") == 0) {
4711 			value = IBD_DEF_RC_RX_COMP_USEC;
4712 		} else if (strcmp(pr_name, "_ibd_rc_rx_copy_thresh") == 0) {
4713 			value = IBD_DEF_RC_RX_COPY_THRESH;
4714 		} else if (strcmp(pr_name, "_ibd_rc_rx_rwqe_thresh") == 0) {
4715 			value = IBD_DEF_RC_RX_RWQE_THRESH;
4716 		} else if (strcmp(pr_name, "_ibd_rc_tx_comp_count") == 0) {
4717 			value = IBD_DEF_RC_TX_COMP_COUNT;
4718 		} else if (strcmp(pr_name, "_ibd_rc_tx_comp_usec") == 0) {
4719 			value = IBD_DEF_RC_TX_COMP_USEC;
4720 		} else if (strcmp(pr_name, "_ibd_rc_tx_copy_thresh") == 0) {
4721 			value = IBD_DEF_RC_TX_COPY_THRESH;
4722 		} else if (strcmp(pr_name, "_ibd_ud_num_rwqe") == 0) {
4723 			value = IBD_DEF_UD_NUM_RWQE;
4724 		} else if (strcmp(pr_name, "_ibd_ud_num_swqe") == 0) {
4725 			value = IBD_DEF_UD_NUM_SWQE;
4726 		} else if (strcmp(pr_name, "_ibd_ud_rx_comp_count") == 0) {
4727 			value = IBD_DEF_UD_RX_COMP_COUNT;
4728 		} else if (strcmp(pr_name, "_ibd_ud_rx_comp_usec") == 0) {
4729 			value = IBD_DEF_UD_RX_COMP_USEC;
4730 		} else if (strcmp(pr_name, "_ibd_ud_tx_comp_count") == 0) {
4731 			value = IBD_DEF_UD_TX_COMP_COUNT;
4732 		} else if (strcmp(pr_name, "_ibd_ud_tx_comp_usec") == 0) {
4733 			value = IBD_DEF_UD_TX_COMP_USEC;
4734 		} else if (strcmp(pr_name, "_ibd_ud_tx_copy_thresh") == 0) {
4735 			value = IBD_DEF_UD_TX_COPY_THRESH;
4736 		} else {
4737 			return;
4738 		}
4739 
4740 		(void) snprintf(valstr, sizeof (valstr), "%d", value);
4741 		mac_prop_info_set_default_str(prh, valstr);
4742 		break;
4743 	}
4744 	} /* switch (pr_num) */
4745 }
4746 
4747 /* ARGSUSED2 */
4748 static int
ibd_set_priv_prop(ibd_state_t * state,const char * pr_name,uint_t pr_valsize,const void * pr_val)4749 ibd_set_priv_prop(ibd_state_t *state, const char *pr_name,
4750     uint_t pr_valsize, const void *pr_val)
4751 {
4752 	int err = 0;
4753 	long result;
4754 
4755 	if (strcmp(pr_name, "_ibd_coalesce_completions") == 0) {
4756 		if (pr_val == NULL) {
4757 			return (EINVAL);
4758 		}
4759 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4760 		if (result < 0 || result > 1) {
4761 			err = EINVAL;
4762 		} else {
4763 			state->id_allow_coalesce_comp_tuning = (result == 1) ?
4764 			    B_TRUE: B_FALSE;
4765 		}
4766 		return (err);
4767 	}
4768 	if (strcmp(pr_name, "_ibd_create_broadcast_group") == 0) {
4769 		if (state->id_mac_state & IBD_DRV_STARTED) {
4770 			return (EBUSY);
4771 		}
4772 		if (pr_val == NULL) {
4773 			return (EINVAL);
4774 		}
4775 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4776 		if (result < 0 || result > 1) {
4777 			err = EINVAL;
4778 		} else {
4779 			state->id_create_broadcast_group = (result == 1) ?
4780 			    B_TRUE: B_FALSE;
4781 		}
4782 		return (err);
4783 	}
4784 	if (strcmp(pr_name, "_ibd_hash_size") == 0) {
4785 		if (state->id_mac_state & IBD_DRV_STARTED) {
4786 			return (EBUSY);
4787 		}
4788 		if (pr_val == NULL) {
4789 			return (EINVAL);
4790 		}
4791 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4792 		if (result < IBD_MIN_HASH_SIZE || result > IBD_MAX_HASH_SIZE) {
4793 			err = EINVAL;
4794 		} else {
4795 			state->id_hash_size = (uint32_t)result;
4796 		}
4797 		return (err);
4798 	}
4799 	if (strcmp(pr_name, "_ibd_lso_enable") == 0) {
4800 		if (state->id_mac_state & IBD_DRV_STARTED) {
4801 			return (EBUSY);
4802 		}
4803 		if (pr_val == NULL) {
4804 			return (EINVAL);
4805 		}
4806 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4807 		if (result < 0 || result > 1) {
4808 			err = EINVAL;
4809 		} else {
4810 			state->id_lso_policy = (result == 1) ?
4811 			    B_TRUE: B_FALSE;
4812 		}
4813 		mac_capab_update(state->id_mh);
4814 		return (err);
4815 	}
4816 	if (strcmp(pr_name, "_ibd_num_ah") == 0) {
4817 		if (state->id_mac_state & IBD_DRV_STARTED) {
4818 			return (EBUSY);
4819 		}
4820 		if (pr_val == NULL) {
4821 			return (EINVAL);
4822 		}
4823 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4824 		if (result < IBD_MIN_NUM_AH || result > IBD_MAX_NUM_AH) {
4825 			err = EINVAL;
4826 		} else {
4827 			state->id_num_ah = (uint32_t)result;
4828 		}
4829 		return (err);
4830 	}
4831 	if (strcmp(pr_name, "_ibd_num_lso_bufs") == 0) {
4832 		if (state->id_mac_state & IBD_DRV_STARTED) {
4833 			return (EBUSY);
4834 		}
4835 		if (!state->id_lso_policy || !state->id_lso_capable) {
4836 			return (EINVAL);
4837 		}
4838 		if (pr_val == NULL) {
4839 			return (EINVAL);
4840 		}
4841 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4842 		if (result < IBD_MIN_NUM_LSO_BUFS ||
4843 		    result > IBD_MAX_NUM_LSO_BUFS) {
4844 			err = EINVAL;
4845 		} else {
4846 			state->id_num_lso_bufs = (uint32_t)result;
4847 		}
4848 		return (err);
4849 	}
4850 	if (strcmp(pr_name, "_ibd_rc_enable_srq") == 0) {
4851 		if (state->id_mac_state & IBD_DRV_STARTED) {
4852 			return (EBUSY);
4853 		}
4854 		if (pr_val == NULL) {
4855 			return (EINVAL);
4856 		}
4857 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4858 		if (result < 0 || result > 1) {
4859 			err = EINVAL;
4860 		} else {
4861 			state->rc_enable_srq = (result == 1) ?
4862 			    B_TRUE: B_FALSE;
4863 		}
4864 		if (!state->rc_enable_srq) {
4865 			state->id_rc_num_srq = 0;
4866 		}
4867 		return (err);
4868 	}
4869 	if (strcmp(pr_name, "_ibd_rc_num_rwqe") == 0) {
4870 		if (state->id_mac_state & IBD_DRV_STARTED) {
4871 			return (EBUSY);
4872 		}
4873 		if (pr_val == NULL) {
4874 			return (EINVAL);
4875 		}
4876 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4877 		if (result < IBD_MIN_RC_NUM_RWQE ||
4878 		    result > IBD_MAX_RC_NUM_RWQE) {
4879 			err = EINVAL;
4880 		} else {
4881 			state->id_rc_num_rwqe = (uint32_t)result;
4882 			if (state->id_allow_coalesce_comp_tuning &&
4883 			    state->id_rc_rx_comp_count > state->id_rc_num_rwqe)
4884 				state->id_rc_rx_comp_count =
4885 				    state->id_rc_num_rwqe;
4886 			if (state->id_rc_num_srq > state->id_rc_num_rwqe)
4887 				state->id_rc_num_srq =
4888 				    state->id_rc_num_rwqe - 1;
4889 			/*
4890 			 * If rx_rwqe_threshold is greater than the number of
4891 			 * rwqes, pull it back to 25% of number of rwqes.
4892 			 */
4893 			if (state->id_rc_rx_rwqe_thresh > state->id_rc_num_rwqe)
4894 				state->id_rc_rx_rwqe_thresh =
4895 				    (state->id_rc_num_rwqe >> 2);
4896 
4897 		}
4898 		return (err);
4899 	}
4900 	if (strcmp(pr_name, "_ibd_rc_num_srq") == 0) {
4901 		if (state->id_mac_state & IBD_DRV_STARTED) {
4902 			return (EBUSY);
4903 		}
4904 		if (pr_val == NULL) {
4905 			return (EINVAL);
4906 		}
4907 		if (!state->rc_enable_srq)
4908 			return (EINVAL);
4909 
4910 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4911 		if (result < IBD_MIN_RC_NUM_SRQ ||
4912 		    result >= state->id_rc_num_rwqe) {
4913 			err = EINVAL;
4914 		} else
4915 			state->id_rc_num_srq = (uint32_t)result;
4916 		return (err);
4917 	}
4918 	if (strcmp(pr_name, "_ibd_rc_num_swqe") == 0) {
4919 		if (state->id_mac_state & IBD_DRV_STARTED) {
4920 			return (EBUSY);
4921 		}
4922 		if (pr_val == NULL) {
4923 			return (EINVAL);
4924 		}
4925 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4926 		if (result < IBD_MIN_RC_NUM_SWQE ||
4927 		    result > IBD_MAX_RC_NUM_SWQE) {
4928 			err = EINVAL;
4929 		} else {
4930 			state->id_rc_num_swqe = (uint32_t)result;
4931 			if (state->id_allow_coalesce_comp_tuning &&
4932 			    state->id_rc_tx_comp_count > state->id_rc_num_swqe)
4933 				state->id_rc_tx_comp_count =
4934 				    state->id_rc_num_swqe;
4935 		}
4936 		return (err);
4937 	}
4938 	if (strcmp(pr_name, "_ibd_rc_rx_comp_count") == 0) {
4939 		if (!state->id_allow_coalesce_comp_tuning) {
4940 			return (ENOTSUP);
4941 		}
4942 		if (pr_val == NULL) {
4943 			return (EINVAL);
4944 		}
4945 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4946 		if (result < 1 || result > state->id_rc_num_rwqe) {
4947 			err = EINVAL;
4948 		} else {
4949 			state->id_rc_rx_comp_count = (uint32_t)result;
4950 		}
4951 		return (err);
4952 	}
4953 	if (strcmp(pr_name, "_ibd_rc_rx_comp_usec") == 0) {
4954 		if (!state->id_allow_coalesce_comp_tuning) {
4955 			return (ENOTSUP);
4956 		}
4957 		if (pr_val == NULL) {
4958 			return (EINVAL);
4959 		}
4960 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4961 		if (result < 1) {
4962 			err = EINVAL;
4963 		} else {
4964 			state->id_rc_rx_comp_usec = (uint32_t)result;
4965 		}
4966 		return (err);
4967 	}
4968 	if (strcmp(pr_name, "_ibd_rc_rx_copy_thresh") == 0) {
4969 		if (state->id_mac_state & IBD_DRV_STARTED) {
4970 			return (EBUSY);
4971 		}
4972 		if (pr_val == NULL) {
4973 			return (EINVAL);
4974 		}
4975 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4976 		if (result < IBD_MIN_RC_RX_COPY_THRESH ||
4977 		    result > state->rc_mtu) {
4978 			err = EINVAL;
4979 		} else {
4980 			state->id_rc_rx_copy_thresh = (uint32_t)result;
4981 		}
4982 		return (err);
4983 	}
4984 	if (strcmp(pr_name, "_ibd_rc_rx_rwqe_thresh") == 0) {
4985 		if (state->id_mac_state & IBD_DRV_STARTED) {
4986 			return (EBUSY);
4987 		}
4988 		if (pr_val == NULL) {
4989 			return (EINVAL);
4990 		}
4991 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
4992 		if (result < IBD_MIN_RC_RX_RWQE_THRESH ||
4993 		    result >= state->id_rc_num_rwqe) {
4994 			err = EINVAL;
4995 		} else {
4996 			state->id_rc_rx_rwqe_thresh = (uint32_t)result;
4997 		}
4998 		return (err);
4999 	}
5000 	if (strcmp(pr_name, "_ibd_rc_tx_comp_count") == 0) {
5001 		if (!state->id_allow_coalesce_comp_tuning) {
5002 			return (ENOTSUP);
5003 		}
5004 		if (pr_val == NULL) {
5005 			return (EINVAL);
5006 		}
5007 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5008 		if (result < 1 || result > state->id_rc_num_swqe) {
5009 			err = EINVAL;
5010 		} else {
5011 			state->id_rc_tx_comp_count = (uint32_t)result;
5012 		}
5013 		return (err);
5014 	}
5015 	if (strcmp(pr_name, "_ibd_rc_tx_comp_usec") == 0) {
5016 		if (!state->id_allow_coalesce_comp_tuning) {
5017 			return (ENOTSUP);
5018 		}
5019 		if (pr_val == NULL) {
5020 			return (EINVAL);
5021 		}
5022 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5023 		if (result < 1)
5024 			err = EINVAL;
5025 		else {
5026 			state->id_rc_tx_comp_usec = (uint32_t)result;
5027 		}
5028 		return (err);
5029 	}
5030 	if (strcmp(pr_name, "_ibd_rc_tx_copy_thresh") == 0) {
5031 		if (state->id_mac_state & IBD_DRV_STARTED) {
5032 			return (EBUSY);
5033 		}
5034 		if (pr_val == NULL) {
5035 			return (EINVAL);
5036 		}
5037 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5038 		if (result < IBD_MIN_RC_TX_COPY_THRESH ||
5039 		    result > state->rc_mtu) {
5040 			err = EINVAL;
5041 		} else {
5042 			state->id_rc_tx_copy_thresh = (uint32_t)result;
5043 		}
5044 		return (err);
5045 	}
5046 	if (strcmp(pr_name, "_ibd_ud_num_rwqe") == 0) {
5047 		if (state->id_mac_state & IBD_DRV_STARTED) {
5048 			return (EBUSY);
5049 		}
5050 		if (pr_val == NULL) {
5051 			return (EINVAL);
5052 		}
5053 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5054 		if (result < IBD_MIN_UD_NUM_RWQE ||
5055 		    result > IBD_MAX_UD_NUM_RWQE) {
5056 			err = EINVAL;
5057 		} else {
5058 			if (result > state->id_hca_max_chan_sz) {
5059 				state->id_ud_num_rwqe =
5060 				    state->id_hca_max_chan_sz;
5061 			} else {
5062 				state->id_ud_num_rwqe = (uint32_t)result;
5063 			}
5064 			if (state->id_allow_coalesce_comp_tuning &&
5065 			    state->id_ud_rx_comp_count > state->id_ud_num_rwqe)
5066 				state->id_ud_rx_comp_count =
5067 				    state->id_ud_num_rwqe;
5068 		}
5069 		return (err);
5070 	}
5071 	if (strcmp(pr_name, "_ibd_ud_num_swqe") == 0) {
5072 		if (state->id_mac_state & IBD_DRV_STARTED) {
5073 			return (EBUSY);
5074 		}
5075 		if (pr_val == NULL) {
5076 			return (EINVAL);
5077 		}
5078 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5079 		if (result < IBD_MIN_UD_NUM_SWQE ||
5080 		    result > IBD_MAX_UD_NUM_SWQE) {
5081 			err = EINVAL;
5082 		} else {
5083 			if (result > state->id_hca_max_chan_sz) {
5084 				state->id_ud_num_swqe =
5085 				    state->id_hca_max_chan_sz;
5086 			} else {
5087 				state->id_ud_num_swqe = (uint32_t)result;
5088 			}
5089 			if (state->id_allow_coalesce_comp_tuning &&
5090 			    state->id_ud_tx_comp_count > state->id_ud_num_swqe)
5091 				state->id_ud_tx_comp_count =
5092 				    state->id_ud_num_swqe;
5093 		}
5094 		return (err);
5095 	}
5096 	if (strcmp(pr_name, "_ibd_ud_rx_comp_count") == 0) {
5097 		if (!state->id_allow_coalesce_comp_tuning) {
5098 			return (ENOTSUP);
5099 		}
5100 		if (pr_val == NULL) {
5101 			return (EINVAL);
5102 		}
5103 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5104 		if (result < 1 || result > state->id_ud_num_rwqe) {
5105 			err = EINVAL;
5106 		} else {
5107 			state->id_ud_rx_comp_count = (uint32_t)result;
5108 		}
5109 		return (err);
5110 	}
5111 	if (strcmp(pr_name, "_ibd_ud_rx_comp_usec") == 0) {
5112 		if (!state->id_allow_coalesce_comp_tuning) {
5113 			return (ENOTSUP);
5114 		}
5115 		if (pr_val == NULL) {
5116 			return (EINVAL);
5117 		}
5118 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5119 		if (result < 1) {
5120 			err = EINVAL;
5121 		} else {
5122 			state->id_ud_rx_comp_usec = (uint32_t)result;
5123 		}
5124 		return (err);
5125 	}
5126 	if (strcmp(pr_name, "_ibd_ud_tx_comp_count") == 0) {
5127 		if (!state->id_allow_coalesce_comp_tuning) {
5128 			return (ENOTSUP);
5129 		}
5130 		if (pr_val == NULL) {
5131 			return (EINVAL);
5132 		}
5133 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5134 		if (result < 1 || result > state->id_ud_num_swqe) {
5135 			err = EINVAL;
5136 		} else {
5137 			state->id_ud_tx_comp_count = (uint32_t)result;
5138 		}
5139 		return (err);
5140 	}
5141 	if (strcmp(pr_name, "_ibd_ud_tx_comp_usec") == 0) {
5142 		if (!state->id_allow_coalesce_comp_tuning) {
5143 			return (ENOTSUP);
5144 		}
5145 		if (pr_val == NULL) {
5146 			return (EINVAL);
5147 		}
5148 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5149 		if (result < 1) {
5150 			err = EINVAL;
5151 		} else {
5152 			state->id_ud_tx_comp_usec = (uint32_t)result;
5153 		}
5154 		return (err);
5155 	}
5156 	if (strcmp(pr_name, "_ibd_ud_tx_copy_thresh") == 0) {
5157 		if (state->id_mac_state & IBD_DRV_STARTED) {
5158 			return (EBUSY);
5159 		}
5160 		if (pr_val == NULL) {
5161 			return (EINVAL);
5162 		}
5163 		(void) ddi_strtol(pr_val, (char **)NULL, 0, &result);
5164 		if (result < IBD_MIN_UD_TX_COPY_THRESH ||
5165 		    result > IBD_MAX_UD_TX_COPY_THRESH) {
5166 			err = EINVAL;
5167 		} else {
5168 			state->id_ud_tx_copy_thresh = (uint32_t)result;
5169 		}
5170 		return (err);
5171 	}
5172 	return (ENOTSUP);
5173 }
5174 
5175 static int
ibd_get_priv_prop(ibd_state_t * state,const char * pr_name,uint_t pr_valsize,void * pr_val)5176 ibd_get_priv_prop(ibd_state_t *state, const char *pr_name, uint_t pr_valsize,
5177     void *pr_val)
5178 {
5179 	int err = ENOTSUP;
5180 	int value;
5181 
5182 	if (strcmp(pr_name, "_ibd_broadcast_group") == 0) {
5183 		value = state->id_bgroup_present;
5184 		err = 0;
5185 		goto done;
5186 	}
5187 	if (strcmp(pr_name, "_ibd_coalesce_completions") == 0) {
5188 		value = state->id_allow_coalesce_comp_tuning;
5189 		err = 0;
5190 		goto done;
5191 	}
5192 	if (strcmp(pr_name, "_ibd_create_broadcast_group") == 0) {
5193 		value = state->id_create_broadcast_group;
5194 		err = 0;
5195 		goto done;
5196 	}
5197 	if (strcmp(pr_name, "_ibd_hash_size") == 0) {
5198 		value = state->id_hash_size;
5199 		err = 0;
5200 		goto done;
5201 	}
5202 	if (strcmp(pr_name, "_ibd_lso_enable") == 0) {
5203 		value = state->id_lso_policy;
5204 		err = 0;
5205 		goto done;
5206 	}
5207 	if (strcmp(pr_name, "_ibd_num_ah") == 0) {
5208 		value = state->id_num_ah;
5209 		err = 0;
5210 		goto done;
5211 	}
5212 	if (strcmp(pr_name, "_ibd_num_lso_bufs") == 0) {
5213 		value = state->id_num_lso_bufs;
5214 		err = 0;
5215 		goto done;
5216 	}
5217 	if (strcmp(pr_name, "_ibd_rc_enable_srq") == 0) {
5218 		value = state->rc_enable_srq;
5219 		err = 0;
5220 		goto done;
5221 	}
5222 	if (strcmp(pr_name, "_ibd_rc_num_rwqe") == 0) {
5223 		value = state->id_rc_num_rwqe;
5224 		err = 0;
5225 		goto done;
5226 	}
5227 	if (strcmp(pr_name, "_ibd_rc_num_srq") == 0) {
5228 		value = state->id_rc_num_srq;
5229 		err = 0;
5230 		goto done;
5231 	}
5232 	if (strcmp(pr_name, "_ibd_rc_num_swqe") == 0) {
5233 		value = state->id_rc_num_swqe;
5234 		err = 0;
5235 		goto done;
5236 	}
5237 	if (strcmp(pr_name, "_ibd_rc_rx_comp_count") == 0) {
5238 		value = state->id_rc_rx_comp_count;
5239 		err = 0;
5240 		goto done;
5241 	}
5242 	if (strcmp(pr_name, "_ibd_rc_rx_comp_usec") == 0) {
5243 		value = state->id_rc_rx_comp_usec;
5244 		err = 0;
5245 		goto done;
5246 	}
5247 	if (strcmp(pr_name, "_ibd_rc_rx_copy_thresh") == 0) {
5248 		value = state->id_rc_rx_copy_thresh;
5249 		err = 0;
5250 		goto done;
5251 	}
5252 	if (strcmp(pr_name, "_ibd_rc_rx_rwqe_thresh") == 0) {
5253 		value = state->id_rc_rx_rwqe_thresh;
5254 		err = 0;
5255 		goto done;
5256 	}
5257 	if (strcmp(pr_name, "_ibd_rc_tx_comp_count") == 0) {
5258 		value = state->id_rc_tx_comp_count;
5259 		err = 0;
5260 		goto done;
5261 	}
5262 	if (strcmp(pr_name, "_ibd_rc_tx_comp_usec") == 0) {
5263 		value = state->id_rc_tx_comp_usec;
5264 		err = 0;
5265 		goto done;
5266 	}
5267 	if (strcmp(pr_name, "_ibd_rc_tx_copy_thresh") == 0) {
5268 		value = state->id_rc_tx_copy_thresh;
5269 		err = 0;
5270 		goto done;
5271 	}
5272 	if (strcmp(pr_name, "_ibd_ud_num_rwqe") == 0) {
5273 		value = state->id_ud_num_rwqe;
5274 		err = 0;
5275 		goto done;
5276 	}
5277 	if (strcmp(pr_name, "_ibd_ud_num_swqe") == 0) {
5278 		value = state->id_ud_num_swqe;
5279 		err = 0;
5280 		goto done;
5281 	}
5282 	if (strcmp(pr_name, "_ibd_ud_rx_comp_count") == 0) {
5283 		value = state->id_ud_rx_comp_count;
5284 		err = 0;
5285 		goto done;
5286 	}
5287 	if (strcmp(pr_name, "_ibd_ud_rx_comp_usec") == 0) {
5288 		value = state->id_ud_rx_comp_usec;
5289 		err = 0;
5290 		goto done;
5291 	}
5292 	if (strcmp(pr_name, "_ibd_ud_tx_comp_count") == 0) {
5293 		value = state->id_ud_tx_comp_count;
5294 		err = 0;
5295 		goto done;
5296 	}
5297 	if (strcmp(pr_name, "_ibd_ud_tx_comp_usec") == 0) {
5298 		value = state->id_ud_tx_comp_usec;
5299 		err = 0;
5300 		goto done;
5301 	}
5302 	if (strcmp(pr_name, "_ibd_ud_tx_copy_thresh") == 0) {
5303 		value = state->id_ud_tx_copy_thresh;
5304 		err = 0;
5305 		goto done;
5306 	}
5307 done:
5308 	if (err == 0) {
5309 		(void) snprintf(pr_val, pr_valsize, "%d", value);
5310 	}
5311 	return (err);
5312 }
5313 
5314 static int
ibd_get_port_details(ibd_state_t * state)5315 ibd_get_port_details(ibd_state_t *state)
5316 {
5317 	ibt_hca_portinfo_t *port_infop;
5318 	ibt_status_t ret;
5319 	uint_t psize, port_infosz;
5320 
5321 	mutex_enter(&state->id_link_mutex);
5322 
5323 	/*
5324 	 * Query for port information
5325 	 */
5326 	ret = ibt_query_hca_ports(state->id_hca_hdl, state->id_port,
5327 	    &port_infop, &psize, &port_infosz);
5328 	if ((ret != IBT_SUCCESS) || (psize != 1)) {
5329 		mutex_exit(&state->id_link_mutex);
5330 		DPRINT(10, "ibd_get_port_details: ibt_query_hca_ports() "
5331 		    "failed, ret=%d", ret);
5332 		return (ENETDOWN);
5333 	}
5334 
5335 	/*
5336 	 * If the link is active, verify the pkey
5337 	 */
5338 	if (port_infop->p_linkstate == IBT_PORT_ACTIVE) {
5339 		if ((ret = ibt_pkey2index(state->id_hca_hdl, state->id_port,
5340 		    state->id_pkey, &state->id_pkix)) != IBT_SUCCESS) {
5341 			state->id_link_state = LINK_STATE_DOWN;
5342 		} else {
5343 			state->id_link_state = LINK_STATE_UP;
5344 		}
5345 		state->id_mtu = (128 << port_infop->p_mtu);
5346 		_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(state->id_sgid))
5347 		state->id_sgid = *port_infop->p_sgid_tbl;
5348 		_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(state->id_sgid))
5349 		/*
5350 		 * Now that the port is active, record the port speed
5351 		 */
5352 		state->id_link_speed = ibd_get_portspeed(state);
5353 	} else {
5354 		/* Make sure that these are handled in PORT_UP/CHANGE */
5355 		state->id_mtu = 0;
5356 		state->id_link_state = LINK_STATE_DOWN;
5357 		state->id_link_speed = 0;
5358 	}
5359 	mutex_exit(&state->id_link_mutex);
5360 	ibt_free_portinfo(port_infop, port_infosz);
5361 
5362 	return (0);
5363 }
5364 
5365 static int
ibd_alloc_cqs(ibd_state_t * state)5366 ibd_alloc_cqs(ibd_state_t *state)
5367 {
5368 	ibt_hca_attr_t hca_attrs;
5369 	ibt_cq_attr_t cq_attr;
5370 	ibt_status_t ret;
5371 	uint32_t real_size;
5372 	uint_t num_rwqe_change = 0;
5373 	uint_t num_swqe_change = 0;
5374 
5375 	ret = ibt_query_hca(state->id_hca_hdl, &hca_attrs);
5376 	ASSERT(ret == IBT_SUCCESS);
5377 
5378 	/*
5379 	 * Allocate Rx/combined CQ:
5380 	 * Theoretically, there is no point in having more than #rwqe
5381 	 * plus #swqe cqe's, except that the CQ will be signaled for
5382 	 * overflow when the last wqe completes, if none of the previous
5383 	 * cqe's have been polled. Thus, we allocate just a few less wqe's
5384 	 * to make sure such overflow does not occur.
5385 	 */
5386 	cq_attr.cq_sched = NULL;
5387 	cq_attr.cq_flags = IBT_CQ_NO_FLAGS;
5388 
5389 	/*
5390 	 * Allocate Receive CQ.
5391 	 */
5392 	if (hca_attrs.hca_max_cq_sz >= (state->id_ud_num_rwqe + 1)) {
5393 		cq_attr.cq_size = state->id_ud_num_rwqe + 1;
5394 	} else {
5395 		cq_attr.cq_size = hca_attrs.hca_max_cq_sz;
5396 		num_rwqe_change = state->id_ud_num_rwqe;
5397 		state->id_ud_num_rwqe = cq_attr.cq_size - 1;
5398 	}
5399 
5400 	if ((ret = ibt_alloc_cq(state->id_hca_hdl, &cq_attr,
5401 	    &state->id_rcq_hdl, &real_size)) != IBT_SUCCESS) {
5402 		DPRINT(10, "ibd_alloc_cqs: ibt_alloc_cq(rcq) "
5403 		    "failed, ret=%d\n", ret);
5404 		return (DDI_FAILURE);
5405 	}
5406 
5407 	if ((ret = ibt_modify_cq(state->id_rcq_hdl, state->id_ud_rx_comp_count,
5408 	    state->id_ud_rx_comp_usec, 0)) != IBT_SUCCESS) {
5409 		DPRINT(10, "ibd_alloc_cqs: Receive CQ interrupt "
5410 		    "moderation failed, ret=%d\n", ret);
5411 	}
5412 
5413 	/* make the #rx wc's the same as max rx chain size */
5414 	state->id_rxwcs_size = IBD_MAX_RX_MP_LEN;
5415 	state->id_rxwcs = kmem_alloc(sizeof (ibt_wc_t) *
5416 	    state->id_rxwcs_size, KM_SLEEP);
5417 
5418 	/*
5419 	 * Allocate Send CQ.
5420 	 */
5421 	if (hca_attrs.hca_max_cq_sz >= (state->id_ud_num_swqe + 1)) {
5422 		cq_attr.cq_size = state->id_ud_num_swqe + 1;
5423 	} else {
5424 		cq_attr.cq_size = hca_attrs.hca_max_cq_sz;
5425 		num_swqe_change = state->id_ud_num_swqe;
5426 		state->id_ud_num_swqe = cq_attr.cq_size - 1;
5427 	}
5428 
5429 	if ((ret = ibt_alloc_cq(state->id_hca_hdl, &cq_attr,
5430 	    &state->id_scq_hdl, &real_size)) != IBT_SUCCESS) {
5431 		DPRINT(10, "ibd_alloc_cqs: ibt_alloc_cq(scq) "
5432 		    "failed, ret=%d\n", ret);
5433 		kmem_free(state->id_rxwcs, sizeof (ibt_wc_t) *
5434 		    state->id_rxwcs_size);
5435 		(void) ibt_free_cq(state->id_rcq_hdl);
5436 		return (DDI_FAILURE);
5437 	}
5438 	if ((ret = ibt_modify_cq(state->id_scq_hdl, state->id_ud_tx_comp_count,
5439 	    state->id_ud_tx_comp_usec, 0)) != IBT_SUCCESS) {
5440 		DPRINT(10, "ibd_alloc_cqs: Send CQ interrupt "
5441 		    "moderation failed, ret=%d\n", ret);
5442 	}
5443 
5444 	state->id_txwcs_size = IBD_TX_POLL_THRESH;
5445 	state->id_txwcs = kmem_alloc(sizeof (ibt_wc_t) *
5446 	    state->id_txwcs_size, KM_SLEEP);
5447 
5448 	/*
5449 	 * Print message in case we could not allocate as many wqe's
5450 	 * as was requested.
5451 	 */
5452 	if (num_rwqe_change) {
5453 		ibd_print_warn(state, "Setting #rwqe = %d instead of default "
5454 		    "%d", state->id_ud_num_rwqe, num_rwqe_change);
5455 	}
5456 	if (num_swqe_change) {
5457 		ibd_print_warn(state, "Setting #swqe = %d instead of default "
5458 		    "%d", state->id_ud_num_swqe, num_swqe_change);
5459 	}
5460 
5461 	return (DDI_SUCCESS);
5462 }
5463 
5464 static int
ibd_setup_ud_channel(ibd_state_t * state)5465 ibd_setup_ud_channel(ibd_state_t *state)
5466 {
5467 	ibt_ud_chan_alloc_args_t ud_alloc_attr;
5468 	ibt_ud_chan_query_attr_t ud_chan_attr;
5469 	ibt_status_t ret;
5470 
5471 	ud_alloc_attr.ud_flags  = IBT_ALL_SIGNALED;
5472 	if (state->id_hca_res_lkey_capab)
5473 		ud_alloc_attr.ud_flags |= IBT_FAST_REG_RES_LKEY;
5474 	if (state->id_lso_policy && state->id_lso_capable)
5475 		ud_alloc_attr.ud_flags |= IBT_USES_LSO;
5476 
5477 	ud_alloc_attr.ud_hca_port_num	= state->id_port;
5478 	ud_alloc_attr.ud_sizes.cs_sq_sgl = state->id_max_sqseg;
5479 	ud_alloc_attr.ud_sizes.cs_rq_sgl = IBD_MAX_RQSEG;
5480 	ud_alloc_attr.ud_sizes.cs_sq    = state->id_ud_num_swqe;
5481 	ud_alloc_attr.ud_sizes.cs_rq    = state->id_ud_num_rwqe;
5482 	ud_alloc_attr.ud_qkey		= state->id_mcinfo->mc_qkey;
5483 	ud_alloc_attr.ud_scq		= state->id_scq_hdl;
5484 	ud_alloc_attr.ud_rcq		= state->id_rcq_hdl;
5485 	ud_alloc_attr.ud_pd		= state->id_pd_hdl;
5486 	ud_alloc_attr.ud_pkey_ix	= state->id_pkix;
5487 	ud_alloc_attr.ud_clone_chan	= NULL;
5488 
5489 	if ((ret = ibt_alloc_ud_channel(state->id_hca_hdl, IBT_ACHAN_NO_FLAGS,
5490 	    &ud_alloc_attr, &state->id_chnl_hdl, NULL)) != IBT_SUCCESS) {
5491 		DPRINT(10, "ibd_setup_ud_channel: ibt_alloc_ud_channel() "
5492 		    "failed, ret=%d\n", ret);
5493 		return (DDI_FAILURE);
5494 	}
5495 
5496 	if ((ret = ibt_query_ud_channel(state->id_chnl_hdl,
5497 	    &ud_chan_attr)) != IBT_SUCCESS) {
5498 		DPRINT(10, "ibd_setup_ud_channel: ibt_query_ud_channel() "
5499 		    "failed, ret=%d\n", ret);
5500 		(void) ibt_free_channel(state->id_chnl_hdl);
5501 		return (DDI_FAILURE);
5502 	}
5503 
5504 	state->id_qpnum = ud_chan_attr.ud_qpn;
5505 
5506 	return (DDI_SUCCESS);
5507 }
5508 
5509 static int
ibd_undo_start(ibd_state_t * state,link_state_t cur_link_state)5510 ibd_undo_start(ibd_state_t *state, link_state_t cur_link_state)
5511 {
5512 	uint32_t progress = state->id_mac_state;
5513 	uint_t attempts;
5514 	ibt_status_t ret;
5515 	ib_gid_t mgid;
5516 	ibd_mce_t *mce;
5517 	uint8_t jstate;
5518 	timeout_id_t tid;
5519 
5520 	if (atomic_dec_32_nv(&state->id_running) != 0)
5521 		cmn_err(CE_WARN, "ibd_undo_start: id_running was not 1\n");
5522 
5523 	/*
5524 	 * Before we try to stop/undo whatever we did in ibd_start(),
5525 	 * we need to mark the link state appropriately to prevent the
5526 	 * ip layer from using this instance for any new transfers. Note
5527 	 * that if the original state of the link was "up" when we're
5528 	 * here, we'll set the final link state to "unknown", to behave
5529 	 * in the same fashion as other ethernet drivers.
5530 	 */
5531 	mutex_enter(&state->id_link_mutex);
5532 	if (cur_link_state == LINK_STATE_DOWN) {
5533 		state->id_link_state = cur_link_state;
5534 	} else {
5535 		state->id_link_state = LINK_STATE_UNKNOWN;
5536 	}
5537 	mutex_exit(&state->id_link_mutex);
5538 	bzero(&state->id_macaddr, sizeof (ipoib_mac_t));
5539 	mac_link_update(state->id_mh, state->id_link_state);
5540 
5541 	state->id_mac_state &= (~IBD_DRV_PORT_DETAILS_OBTAINED);
5542 	if (progress & IBD_DRV_STARTED) {
5543 		state->id_mac_state &= (~IBD_DRV_STARTED);
5544 	}
5545 
5546 	if (progress & IBD_DRV_IN_LATE_HCA_INIT) {
5547 		state->id_mac_state &= (~IBD_DRV_IN_LATE_HCA_INIT);
5548 	}
5549 
5550 	/* Stop listen under Reliable Connected Mode */
5551 	if (progress & IBD_DRV_RC_LISTEN) {
5552 		ASSERT(state->id_enable_rc);
5553 		if (state->rc_listen_hdl != NULL) {
5554 			ibd_rc_stop_listen(state);
5555 		}
5556 		state->id_mac_state &= (~IBD_DRV_RC_LISTEN);
5557 	}
5558 
5559 	/* Stop timeout routine */
5560 	if (progress & IBD_DRV_RC_TIMEOUT) {
5561 		ASSERT(state->id_enable_rc);
5562 		mutex_enter(&state->rc_timeout_lock);
5563 		state->rc_timeout_start = B_FALSE;
5564 		tid = state->rc_timeout;
5565 		state->rc_timeout = 0;
5566 		mutex_exit(&state->rc_timeout_lock);
5567 		if (tid != 0)
5568 			(void) untimeout(tid);
5569 		state->id_mac_state &= (~IBD_DRV_RC_TIMEOUT);
5570 	}
5571 
5572 	if ((state->id_enable_rc) && (progress & IBD_DRV_ACACHE_INITIALIZED)) {
5573 		attempts = 100;
5574 		while (state->id_ah_op == IBD_OP_ONGOING) {
5575 			/*
5576 			 * "state->id_ah_op == IBD_OP_ONGOING" means this IPoIB
5577 			 * port is connecting to a remote IPoIB port. Wait for
5578 			 * the end of this connecting operation.
5579 			 */
5580 			delay(drv_usectohz(100000));
5581 			if (--attempts == 0) {
5582 				state->rc_stop_connect++;
5583 				DPRINT(40, "ibd_undo_start: connecting");
5584 				break;
5585 			}
5586 		}
5587 		mutex_enter(&state->id_sched_lock);
5588 		state->id_sched_needed = 0;
5589 		mutex_exit(&state->id_sched_lock);
5590 		(void) ibd_rc_close_all_chan(state);
5591 	}
5592 
5593 	/*
5594 	 * First, stop receive interrupts; this stops the driver from
5595 	 * handing up buffers to higher layers.  Wait for receive buffers
5596 	 * to be returned and give up after 1 second.
5597 	 */
5598 	if (progress & IBD_DRV_RCQ_NOTIFY_ENABLED) {
5599 		attempts = 10;
5600 		while (atomic_add_32_nv(&state->id_rx_list.dl_bufs_outstanding,
5601 		    0) > 0) {
5602 			delay(drv_usectohz(100000));
5603 			if (--attempts == 0) {
5604 				/*
5605 				 * There are pending bufs with the network
5606 				 * layer and we have no choice but to wait
5607 				 * for them to be done with. Reap all the
5608 				 * Tx/Rx completions that were posted since
5609 				 * we turned off the notification and
5610 				 * return failure.
5611 				 */
5612 				cmn_err(CE_CONT, "!ibd: bufs outstanding\n");
5613 				DPRINT(2, "ibd_undo_start: "
5614 				    "reclaiming failed");
5615 				break;
5616 			}
5617 		}
5618 		state->id_mac_state &= (~IBD_DRV_RCQ_NOTIFY_ENABLED);
5619 	}
5620 
5621 	if (progress & IBD_DRV_RC_LARGEBUF_ALLOCD) {
5622 		ibd_rc_fini_tx_largebuf_list(state);
5623 		state->id_mac_state &= (~IBD_DRV_RC_LARGEBUF_ALLOCD);
5624 	}
5625 
5626 	if (progress & IBD_DRV_RC_SRQ_ALLOCD) {
5627 		ASSERT(state->id_enable_rc);
5628 		if (state->rc_srq_rwqe_list.dl_bufs_outstanding == 0) {
5629 			if (state->id_ah_op == IBD_OP_ONGOING) {
5630 				delay(drv_usectohz(10000));
5631 				if (state->id_ah_op == IBD_OP_ONGOING) {
5632 					/*
5633 					 * "state->id_ah_op == IBD_OP_ONGOING"
5634 					 * means this IPoIB port is connecting
5635 					 * to a remote IPoIB port. We can't
5636 					 * delete SRQ here.
5637 					 */
5638 					state->rc_stop_connect++;
5639 					DPRINT(40, "ibd_undo_start: "
5640 					    "connecting");
5641 				} else {
5642 					ibd_rc_fini_srq_list(state);
5643 					state->id_mac_state &=
5644 					    (~IBD_DRV_RC_SRQ_ALLOCD);
5645 				}
5646 			} else {
5647 				ibd_rc_fini_srq_list(state);
5648 				state->id_mac_state &= (~IBD_DRV_RC_SRQ_ALLOCD);
5649 			}
5650 		} else {
5651 			DPRINT(40, "ibd_undo_start: srq bufs outstanding\n");
5652 		}
5653 	}
5654 
5655 	if (progress & IBD_DRV_SM_NOTICES_REGISTERED) {
5656 		ibt_register_subnet_notices(state->id_ibt_hdl, NULL, NULL);
5657 
5658 		mutex_enter(&state->id_trap_lock);
5659 		state->id_trap_stop = B_TRUE;
5660 		while (state->id_trap_inprog > 0)
5661 			cv_wait(&state->id_trap_cv, &state->id_trap_lock);
5662 		mutex_exit(&state->id_trap_lock);
5663 
5664 		state->id_mac_state &= (~IBD_DRV_SM_NOTICES_REGISTERED);
5665 	}
5666 
5667 	if (progress & IBD_DRV_SCQ_NOTIFY_ENABLED) {
5668 		/*
5669 		 * Flushing the channel ensures that all pending WQE's
5670 		 * are marked with flush_error and handed to the CQ. It
5671 		 * does not guarantee the invocation of the CQ handler.
5672 		 * This call is guaranteed to return successfully for
5673 		 * UD QPNs.
5674 		 */
5675 		if ((ret = ibt_flush_channel(state->id_chnl_hdl)) !=
5676 		    IBT_SUCCESS) {
5677 			DPRINT(10, "ibd_undo_start: flush_channel "
5678 			    "failed, ret=%d", ret);
5679 		}
5680 
5681 		/*
5682 		 * Give some time for the TX CQ handler to process the
5683 		 * completions.
5684 		 */
5685 		attempts = 10;
5686 		mutex_enter(&state->id_tx_list.dl_mutex);
5687 		mutex_enter(&state->id_tx_rel_list.dl_mutex);
5688 		while (state->id_tx_list.dl_cnt + state->id_tx_rel_list.dl_cnt
5689 		    != state->id_ud_num_swqe) {
5690 			if (--attempts == 0)
5691 				break;
5692 			mutex_exit(&state->id_tx_rel_list.dl_mutex);
5693 			mutex_exit(&state->id_tx_list.dl_mutex);
5694 			delay(drv_usectohz(100000));
5695 			mutex_enter(&state->id_tx_list.dl_mutex);
5696 			mutex_enter(&state->id_tx_rel_list.dl_mutex);
5697 		}
5698 		ibt_set_cq_handler(state->id_scq_hdl, 0, 0);
5699 		if (state->id_tx_list.dl_cnt + state->id_tx_rel_list.dl_cnt !=
5700 		    state->id_ud_num_swqe) {
5701 			cmn_err(CE_WARN, "tx resources not freed\n");
5702 		}
5703 		mutex_exit(&state->id_tx_rel_list.dl_mutex);
5704 		mutex_exit(&state->id_tx_list.dl_mutex);
5705 
5706 		attempts = 10;
5707 		while (atomic_add_32_nv(&state->id_rx_list.dl_cnt, 0) != 0) {
5708 			if (--attempts == 0)
5709 				break;
5710 			delay(drv_usectohz(100000));
5711 		}
5712 		ibt_set_cq_handler(state->id_rcq_hdl, 0, 0);
5713 		if (atomic_add_32_nv(&state->id_rx_list.dl_cnt, 0) != 0) {
5714 			cmn_err(CE_WARN, "rx resources not freed\n");
5715 		}
5716 
5717 		state->id_mac_state &= (~IBD_DRV_SCQ_NOTIFY_ENABLED);
5718 	}
5719 
5720 	if (progress & IBD_DRV_BCAST_GROUP_JOINED) {
5721 		/*
5722 		 * Drop all residual full/non membership. This includes full
5723 		 * membership to the broadcast group, and any nonmembership
5724 		 * acquired during transmits. We do this after the Tx completion
5725 		 * handlers are done, since those might result in some late
5726 		 * leaves; this also eliminates a potential race with that
5727 		 * path wrt the mc full list insert/delete. Trap handling
5728 		 * has also been suppressed at this point. Thus, no locks
5729 		 * are required while traversing the mc full list.
5730 		 */
5731 		DPRINT(2, "ibd_undo_start: clear full cache entries");
5732 		mce = list_head(&state->id_mc_full);
5733 		while (mce != NULL) {
5734 			mgid = mce->mc_info.mc_adds_vect.av_dgid;
5735 			jstate = mce->mc_jstate;
5736 			mce = list_next(&state->id_mc_full, mce);
5737 			ibd_leave_group(state, mgid, jstate);
5738 		}
5739 		state->id_mac_state &= (~IBD_DRV_BCAST_GROUP_JOINED);
5740 	}
5741 
5742 	if (progress & IBD_DRV_RXLIST_ALLOCD) {
5743 		ibd_fini_rxlist(state);
5744 		state->id_mac_state &= (~IBD_DRV_RXLIST_ALLOCD);
5745 	}
5746 
5747 	if (progress & IBD_DRV_TXLIST_ALLOCD) {
5748 		ibd_fini_txlist(state);
5749 		state->id_mac_state &= (~IBD_DRV_TXLIST_ALLOCD);
5750 	}
5751 
5752 	if (progress & IBD_DRV_UD_CHANNEL_SETUP) {
5753 		if ((ret = ibt_free_channel(state->id_chnl_hdl)) !=
5754 		    IBT_SUCCESS) {
5755 			DPRINT(10, "ibd_undo_start: free_channel "
5756 			    "failed, ret=%d", ret);
5757 		}
5758 
5759 		state->id_mac_state &= (~IBD_DRV_UD_CHANNEL_SETUP);
5760 	}
5761 
5762 	if (progress & IBD_DRV_CQS_ALLOCD) {
5763 		kmem_free(state->id_txwcs,
5764 		    sizeof (ibt_wc_t) * state->id_txwcs_size);
5765 		if ((ret = ibt_free_cq(state->id_scq_hdl)) !=
5766 		    IBT_SUCCESS) {
5767 			DPRINT(10, "ibd_undo_start: free_cq(scq) "
5768 			    "failed, ret=%d", ret);
5769 		}
5770 
5771 		kmem_free(state->id_rxwcs,
5772 		    sizeof (ibt_wc_t) * state->id_rxwcs_size);
5773 		if ((ret = ibt_free_cq(state->id_rcq_hdl)) != IBT_SUCCESS) {
5774 			DPRINT(10, "ibd_undo_start: free_cq(rcq) failed, "
5775 			    "ret=%d", ret);
5776 		}
5777 
5778 		state->id_txwcs = NULL;
5779 		state->id_rxwcs = NULL;
5780 		state->id_scq_hdl = NULL;
5781 		state->id_rcq_hdl = NULL;
5782 
5783 		state->id_mac_state &= (~IBD_DRV_CQS_ALLOCD);
5784 	}
5785 
5786 	if (progress & IBD_DRV_ACACHE_INITIALIZED) {
5787 		mutex_enter(&state->id_ac_mutex);
5788 		mod_hash_destroy_hash(state->id_ah_active_hash);
5789 		mutex_exit(&state->id_ac_mutex);
5790 		ibd_acache_fini(state);
5791 
5792 		state->id_mac_state &= (~IBD_DRV_ACACHE_INITIALIZED);
5793 	}
5794 
5795 	if (progress & IBD_DRV_BCAST_GROUP_FOUND) {
5796 		/*
5797 		 * If we'd created the ipoib broadcast group and had
5798 		 * successfully joined it, leave it now
5799 		 */
5800 		if (state->id_bgroup_created) {
5801 			mgid = state->id_mcinfo->mc_adds_vect.av_dgid;
5802 			jstate = IB_MC_JSTATE_FULL;
5803 			(void) ibt_leave_mcg(state->id_sgid, mgid,
5804 			    state->id_sgid, jstate);
5805 		}
5806 		ibt_free_mcg_info(state->id_mcinfo, 1);
5807 
5808 		state->id_mac_state &= (~IBD_DRV_BCAST_GROUP_FOUND);
5809 	}
5810 
5811 	return (DDI_SUCCESS);
5812 }
5813 
5814 /*
5815  * These pair of routines are used to set/clear the condition that
5816  * the caller is likely to do something to change the id_mac_state.
5817  * If there's already someone doing either a start or a stop (possibly
5818  * due to the async handler detecting a pkey relocation event, a plumb
5819  * or dlpi_open, or an unplumb or dlpi_close coming in), we wait until
5820  * that's done.
5821  */
5822 static void
ibd_set_mac_progress(ibd_state_t * state,uint_t flag)5823 ibd_set_mac_progress(ibd_state_t *state, uint_t flag)
5824 {
5825 	mutex_enter(&state->id_macst_lock);
5826 	while (state->id_mac_state & IBD_DRV_RESTART_IN_PROGRESS)
5827 		cv_wait(&state->id_macst_cv, &state->id_macst_lock);
5828 
5829 	state->id_mac_state |= flag;
5830 	mutex_exit(&state->id_macst_lock);
5831 }
5832 
5833 static void
ibd_clr_mac_progress(ibd_state_t * state,uint_t flag)5834 ibd_clr_mac_progress(ibd_state_t *state, uint_t flag)
5835 {
5836 	mutex_enter(&state->id_macst_lock);
5837 	state->id_mac_state &= (~flag);
5838 	cv_signal(&state->id_macst_cv);
5839 	mutex_exit(&state->id_macst_lock);
5840 }
5841 
5842 /*
5843  * GLDv3 entry point to start hardware.
5844  */
5845 /*ARGSUSED*/
5846 static int
ibd_m_start(void * arg)5847 ibd_m_start(void *arg)
5848 {
5849 	ibd_state_t *state = arg;
5850 	int	ret;
5851 
5852 	if (state->id_type == IBD_PORT_DRIVER)
5853 		return (EINVAL);
5854 
5855 	ibd_set_mac_progress(state, IBD_DRV_START_IN_PROGRESS);
5856 	if (state->id_mac_state & IBD_DRV_IN_DELETION) {
5857 		ibd_clr_mac_progress(state, IBD_DRV_START_IN_PROGRESS);
5858 		return (EIO);
5859 	}
5860 
5861 	ret = ibd_start(state);
5862 	ibd_clr_mac_progress(state, IBD_DRV_START_IN_PROGRESS);
5863 	return (ret);
5864 }
5865 
5866 static int
ibd_start(ibd_state_t * state)5867 ibd_start(ibd_state_t *state)
5868 {
5869 	int err;
5870 	ibt_status_t ret;
5871 	int late_hca_init = 0;
5872 
5873 	if (state->id_mac_state & IBD_DRV_STARTED)
5874 		return (DDI_SUCCESS);
5875 
5876 	/*
5877 	 * We do not increment the running flag when calling ibd_start() as
5878 	 * a result of some event which moves the state away from late HCA
5879 	 * initialization viz. MCG_CREATED, PORT_CHANGE or link availability.
5880 	 */
5881 	if (!(state->id_mac_state & IBD_DRV_IN_LATE_HCA_INIT) &&
5882 	    (atomic_inc_32_nv(&state->id_running) != 1)) {
5883 		DPRINT(10, "ibd_start: id_running is non-zero");
5884 		cmn_err(CE_WARN, "ibd_start: id_running was not 0\n");
5885 		atomic_dec_32(&state->id_running);
5886 		return (EINVAL);
5887 	}
5888 
5889 	/*
5890 	 * Get port details; if we fail here, something bad happened.
5891 	 * Fail plumb.
5892 	 */
5893 	if ((err = ibd_get_port_details(state)) != 0) {
5894 		DPRINT(10, "ibd_start: ibd_get_port_details() failed");
5895 		goto start_fail;
5896 	}
5897 	/*
5898 	 * If state->id_link_state is DOWN, it indicates that either the port
5899 	 * is down, or the pkey is not available. In both cases, resort to late
5900 	 * initialization. Register for subnet notices, and return success.
5901 	 */
5902 	state->id_mac_state |= IBD_DRV_PORT_DETAILS_OBTAINED;
5903 	if (state->id_link_state == LINK_STATE_DOWN) {
5904 		late_hca_init = 1;
5905 		goto late_hca_init_return;
5906 	}
5907 
5908 	/*
5909 	 * Find the IPoIB broadcast group
5910 	 */
5911 	if (ibd_find_bgroup(state) != IBT_SUCCESS) {
5912 		/* Resort to late initialization */
5913 		late_hca_init = 1;
5914 		goto reg_snet_notices;
5915 	}
5916 	state->id_mac_state |= IBD_DRV_BCAST_GROUP_FOUND;
5917 
5918 	/*
5919 	 * Initialize per-interface caches and lists; if we fail here,
5920 	 * it is most likely due to a lack of resources
5921 	 */
5922 	if (ibd_acache_init(state) != DDI_SUCCESS) {
5923 		DPRINT(10, "ibd_start: ibd_acache_init() failed");
5924 		err = ENOMEM;
5925 		goto start_fail;
5926 	}
5927 	state->id_mac_state |= IBD_DRV_ACACHE_INITIALIZED;
5928 
5929 	/*
5930 	 * Allocate send and receive completion queues
5931 	 */
5932 	if (ibd_alloc_cqs(state) != DDI_SUCCESS) {
5933 		DPRINT(10, "ibd_start: ibd_alloc_cqs() failed");
5934 		err = ENOMEM;
5935 		goto start_fail;
5936 	}
5937 	state->id_mac_state |= IBD_DRV_CQS_ALLOCD;
5938 
5939 	/*
5940 	 * Setup a UD channel
5941 	 */
5942 	if (ibd_setup_ud_channel(state) != DDI_SUCCESS) {
5943 		err = ENOMEM;
5944 		DPRINT(10, "ibd_start: ibd_setup_ud_channel() failed");
5945 		goto start_fail;
5946 	}
5947 	state->id_mac_state |= IBD_DRV_UD_CHANNEL_SETUP;
5948 
5949 	/*
5950 	 * Allocate and initialize the tx buffer list
5951 	 */
5952 	if (ibd_init_txlist(state) != DDI_SUCCESS) {
5953 		DPRINT(10, "ibd_start: ibd_init_txlist() failed");
5954 		err = ENOMEM;
5955 		goto start_fail;
5956 	}
5957 	state->id_mac_state |= IBD_DRV_TXLIST_ALLOCD;
5958 
5959 	/*
5960 	 * Create the send cq handler here
5961 	 */
5962 	ibt_set_cq_handler(state->id_scq_hdl, ibd_scq_handler, state);
5963 	if ((ret = ibt_enable_cq_notify(state->id_scq_hdl,
5964 	    IBT_NEXT_COMPLETION)) != IBT_SUCCESS) {
5965 		DPRINT(10, "ibd_start: ibt_enable_cq_notify(scq) "
5966 		    "failed, ret=%d", ret);
5967 		err = EINVAL;
5968 		goto start_fail;
5969 	}
5970 	state->id_mac_state |= IBD_DRV_SCQ_NOTIFY_ENABLED;
5971 
5972 	/*
5973 	 * Allocate and initialize the rx buffer list
5974 	 */
5975 	if (ibd_init_rxlist(state) != DDI_SUCCESS) {
5976 		DPRINT(10, "ibd_start: ibd_init_rxlist() failed");
5977 		err = ENOMEM;
5978 		goto start_fail;
5979 	}
5980 	state->id_mac_state |= IBD_DRV_RXLIST_ALLOCD;
5981 
5982 	/*
5983 	 * Join IPoIB broadcast group
5984 	 */
5985 	if (ibd_join_group(state, state->id_mgid, IB_MC_JSTATE_FULL) == NULL) {
5986 		DPRINT(10, "ibd_start: ibd_join_group() failed");
5987 		err = ENOTACTIVE;
5988 		goto start_fail;
5989 	}
5990 	state->id_mac_state |= IBD_DRV_BCAST_GROUP_JOINED;
5991 
5992 	/*
5993 	 * When we did mac_register() in ibd_attach(), we didn't register
5994 	 * the real macaddr and we didn't have the true port mtu. Now that
5995 	 * we're almost ready, set the local mac address and broadcast
5996 	 * addresses and update gldv3 about the real values of these
5997 	 * parameters.
5998 	 */
5999 	if (state->id_enable_rc) {
6000 		ibd_h2n_mac(&state->id_macaddr,
6001 		    IBD_MAC_ADDR_RC + state->id_qpnum,
6002 		    state->id_sgid.gid_prefix, state->id_sgid.gid_guid);
6003 		ibd_h2n_mac(&state->rc_macaddr_loopback, state->id_qpnum,
6004 		    state->id_sgid.gid_prefix, state->id_sgid.gid_guid);
6005 	} else {
6006 		ibd_h2n_mac(&state->id_macaddr, state->id_qpnum,
6007 		    state->id_sgid.gid_prefix, state->id_sgid.gid_guid);
6008 	}
6009 	ibd_h2n_mac(&state->id_bcaddr, IB_QPN_MASK,
6010 	    state->id_mgid.gid_prefix, state->id_mgid.gid_guid);
6011 
6012 	if (!state->id_enable_rc) {
6013 		(void) mac_maxsdu_update2(state->id_mh,
6014 		    state->id_mtu - IPOIB_HDRSIZE,
6015 		    state->id_mtu - IPOIB_HDRSIZE);
6016 	}
6017 	mac_unicst_update(state->id_mh, (uint8_t *)&state->id_macaddr);
6018 
6019 	/*
6020 	 * Setup the receive cq handler
6021 	 */
6022 	ibt_set_cq_handler(state->id_rcq_hdl, ibd_rcq_handler, state);
6023 	if ((ret = ibt_enable_cq_notify(state->id_rcq_hdl,
6024 	    IBT_NEXT_COMPLETION)) != IBT_SUCCESS) {
6025 		DPRINT(10, "ibd_start: ibt_enable_cq_notify(rcq) "
6026 		    "failed, ret=%d", ret);
6027 		err = EINVAL;
6028 		goto start_fail;
6029 	}
6030 	state->id_mac_state |= IBD_DRV_RCQ_NOTIFY_ENABLED;
6031 
6032 reg_snet_notices:
6033 	/*
6034 	 * In case of normal initialization sequence,
6035 	 * Setup the subnet notices handler after we've initialized the acache/
6036 	 * mcache and started the async thread, both of which are required for
6037 	 * the trap handler to function properly.
6038 	 *
6039 	 * Now that the async thread has been started (and we've already done
6040 	 * a mac_register() during attach so mac_tx_update() can be called
6041 	 * if necessary without any problem), we can enable the trap handler
6042 	 * to queue requests to the async thread.
6043 	 *
6044 	 * In case of late hca initialization, the subnet notices handler will
6045 	 * only handle MCG created/deleted event. The action performed as part
6046 	 * of handling these events is to start the interface. So, the
6047 	 * acache/mcache initialization is not a necessity in such cases for
6048 	 * registering the subnet notices handler. Also, if we are in
6049 	 * ibd_start() as a result of, say, some event handling after entering
6050 	 * late hca initialization phase no need to register again.
6051 	 */
6052 	if ((state->id_mac_state & IBD_DRV_SM_NOTICES_REGISTERED) == 0) {
6053 		ibt_register_subnet_notices(state->id_ibt_hdl,
6054 		    ibd_snet_notices_handler, state);
6055 		mutex_enter(&state->id_trap_lock);
6056 		state->id_trap_stop = B_FALSE;
6057 		mutex_exit(&state->id_trap_lock);
6058 		state->id_mac_state |= IBD_DRV_SM_NOTICES_REGISTERED;
6059 	}
6060 
6061 late_hca_init_return:
6062 	if (late_hca_init == 1) {
6063 		state->id_mac_state |= IBD_DRV_IN_LATE_HCA_INIT;
6064 		/*
6065 		 * In case of late initialization, mark the link state as down,
6066 		 * immaterial of the actual link state as reported in the
6067 		 * port_info.
6068 		 */
6069 		state->id_link_state = LINK_STATE_DOWN;
6070 		mac_unicst_update(state->id_mh, (uint8_t *)&state->id_macaddr);
6071 		mac_link_update(state->id_mh, state->id_link_state);
6072 		return (DDI_SUCCESS);
6073 	}
6074 
6075 	if (state->id_enable_rc) {
6076 		if (state->rc_enable_srq) {
6077 			if (state->id_mac_state & IBD_DRV_RC_SRQ_ALLOCD) {
6078 				if (ibd_rc_repost_srq_free_list(state) !=
6079 				    IBT_SUCCESS) {
6080 					err = ENOMEM;
6081 					goto start_fail;
6082 				}
6083 			} else {
6084 				/* Allocate SRQ resource */
6085 				if (ibd_rc_init_srq_list(state) !=
6086 				    IBT_SUCCESS) {
6087 					err = ENOMEM;
6088 					goto start_fail;
6089 				}
6090 				state->id_mac_state |= IBD_DRV_RC_SRQ_ALLOCD;
6091 			}
6092 		}
6093 
6094 		if (ibd_rc_init_tx_largebuf_list(state) != IBT_SUCCESS) {
6095 			DPRINT(10, "ibd_start: ibd_rc_init_tx_largebuf_list() "
6096 			    "failed");
6097 			err = ENOMEM;
6098 			goto start_fail;
6099 		}
6100 		state->id_mac_state |= IBD_DRV_RC_LARGEBUF_ALLOCD;
6101 
6102 		/* RC: begin to listen only after everything is available */
6103 		if (ibd_rc_listen(state) != IBT_SUCCESS) {
6104 			DPRINT(10, "ibd_start: ibd_rc_listen() failed");
6105 			err = EINVAL;
6106 			goto start_fail;
6107 		}
6108 		state->id_mac_state |= IBD_DRV_RC_LISTEN;
6109 	}
6110 
6111 	/*
6112 	 * Indicate link status to GLDv3 and higher layers. By default,
6113 	 * we assume we are in up state (which must have been true at
6114 	 * least at the time the broadcast mcg's were probed); if there
6115 	 * were any up/down transitions till the time we come here, the
6116 	 * async handler will have updated last known state, which we
6117 	 * use to tell GLDv3. The async handler will not send any
6118 	 * notifications to GLDv3 till we reach here in the initialization
6119 	 * sequence.
6120 	 */
6121 	mac_link_update(state->id_mh, state->id_link_state);
6122 	state->id_mac_state &= ~IBD_DRV_IN_LATE_HCA_INIT;
6123 	state->id_mac_state |= IBD_DRV_STARTED;
6124 
6125 	/* Start timer after everything is ready */
6126 	if (state->id_enable_rc) {
6127 		mutex_enter(&state->rc_timeout_lock);
6128 		state->rc_timeout_start = B_TRUE;
6129 		state->rc_timeout = timeout(ibd_rc_conn_timeout_call, state,
6130 		    SEC_TO_TICK(ibd_rc_conn_timeout));
6131 		mutex_exit(&state->rc_timeout_lock);
6132 		state->id_mac_state |= IBD_DRV_RC_TIMEOUT;
6133 	}
6134 
6135 	return (DDI_SUCCESS);
6136 
6137 start_fail:
6138 	/*
6139 	 * If we ran into a problem during ibd_start() and ran into
6140 	 * some other problem during undoing our partial work, we can't
6141 	 * do anything about it.  Ignore any errors we might get from
6142 	 * ibd_undo_start() and just return the original error we got.
6143 	 */
6144 	(void) ibd_undo_start(state, LINK_STATE_DOWN);
6145 	return (err);
6146 }
6147 
6148 /*
6149  * GLDv3 entry point to stop hardware from receiving packets.
6150  */
6151 /*ARGSUSED*/
6152 static void
ibd_m_stop(void * arg)6153 ibd_m_stop(void *arg)
6154 {
6155 	ibd_state_t *state = (ibd_state_t *)arg;
6156 
6157 	if (state->id_type == IBD_PORT_DRIVER)
6158 		return;
6159 
6160 	ibd_set_mac_progress(state, IBD_DRV_STOP_IN_PROGRESS);
6161 
6162 	(void) ibd_undo_start(state, state->id_link_state);
6163 
6164 	ibd_clr_mac_progress(state, IBD_DRV_STOP_IN_PROGRESS);
6165 }
6166 
6167 /*
6168  * GLDv3 entry point to modify device's mac address. We do not
6169  * allow address modifications.
6170  */
6171 static int
ibd_m_unicst(void * arg,const uint8_t * macaddr)6172 ibd_m_unicst(void *arg, const uint8_t *macaddr)
6173 {
6174 	ibd_state_t *state = arg;
6175 
6176 	if (state->id_type == IBD_PORT_DRIVER)
6177 		return (EINVAL);
6178 
6179 	/*
6180 	 * Don't bother even comparing the macaddr if we haven't
6181 	 * completed ibd_m_start().
6182 	 */
6183 	if ((state->id_mac_state & IBD_DRV_STARTED) == 0)
6184 		return (0);
6185 
6186 	if (bcmp(macaddr, &state->id_macaddr, IPOIB_ADDRL) == 0)
6187 		return (0);
6188 	else
6189 		return (EINVAL);
6190 }
6191 
6192 /*
6193  * The blocking part of the IBA join/leave operations are done out
6194  * of here on the async thread.
6195  */
6196 static void
ibd_async_multicast(ibd_state_t * state,ib_gid_t mgid,int op)6197 ibd_async_multicast(ibd_state_t *state, ib_gid_t mgid, int op)
6198 {
6199 	DPRINT(3, "ibd_async_multicast : async_setmc op %d :"
6200 	    "%016llx:%016llx\n", op, mgid.gid_prefix, mgid.gid_guid);
6201 
6202 	if (op == IBD_ASYNC_JOIN) {
6203 		if (ibd_join_group(state, mgid, IB_MC_JSTATE_FULL) == NULL) {
6204 			ibd_print_warn(state, "Join multicast group failed :"
6205 			"%016llx:%016llx", mgid.gid_prefix, mgid.gid_guid);
6206 		}
6207 	} else {
6208 		/*
6209 		 * Here, we must search for the proper mcg_info and
6210 		 * use that to leave the group.
6211 		 */
6212 		ibd_leave_group(state, mgid, IB_MC_JSTATE_FULL);
6213 	}
6214 }
6215 
6216 /*
6217  * GLDv3 entry point for multicast enable/disable requests.
6218  * This function queues the operation to the async thread and
6219  * return success for a valid multicast address.
6220  */
6221 static int
ibd_m_multicst(void * arg,boolean_t add,const uint8_t * mcmac)6222 ibd_m_multicst(void *arg, boolean_t add, const uint8_t *mcmac)
6223 {
6224 	ibd_state_t *state = (ibd_state_t *)arg;
6225 	ipoib_mac_t maddr, *mcast;
6226 	ib_gid_t mgid;
6227 	ibd_req_t *req;
6228 
6229 	if (state->id_type == IBD_PORT_DRIVER)
6230 		return (EINVAL);
6231 
6232 	/*
6233 	 * If we haven't completed ibd_m_start(), async thread wouldn't
6234 	 * have been started and id_bcaddr wouldn't be set, so there's
6235 	 * no point in continuing.
6236 	 */
6237 	if ((state->id_mac_state & IBD_DRV_STARTED) == 0)
6238 		return (0);
6239 
6240 	/*
6241 	 * The incoming multicast address might not be aligned properly
6242 	 * on a 4 byte boundary to be considered an ipoib_mac_t. We force
6243 	 * it to look like one though, to get the offsets of the mc gid,
6244 	 * since we know we are not going to dereference any values with
6245 	 * the ipoib_mac_t pointer.
6246 	 */
6247 	bcopy(mcmac, &maddr, sizeof (ipoib_mac_t));
6248 	mcast = &maddr;
6249 
6250 	/*
6251 	 * Check validity of MCG address. We could additionally check
6252 	 * that a enable/disable is not being issued on the "broadcast"
6253 	 * mcg, but since this operation is only invokable by privileged
6254 	 * programs anyway, we allow the flexibility to those dlpi apps.
6255 	 * Note that we do not validate the "scope" of the IBA mcg.
6256 	 */
6257 	if ((ntohl(mcast->ipoib_qpn) & IB_QPN_MASK) != IB_MC_QPN)
6258 		return (EINVAL);
6259 
6260 	/*
6261 	 * fill in multicast pkey and scope
6262 	 */
6263 	IBD_FILL_SCOPE_PKEY(mcast, state->id_scope, state->id_pkey);
6264 
6265 	/*
6266 	 * If someone is trying to JOIN/LEAVE the broadcast group, we do
6267 	 * nothing (i.e. we stay JOINed to the broadcast group done in
6268 	 * ibd_m_start()), to mimic ethernet behavior. IPv4 specifically
6269 	 * requires to be joined to broadcast groups at all times.
6270 	 * ibd_join_group() has an ASSERT(omce->mc_fullreap) that also
6271 	 * depends on this.
6272 	 */
6273 	if (bcmp(mcast, &state->id_bcaddr, IPOIB_ADDRL) == 0)
6274 		return (0);
6275 
6276 	ibd_n2h_gid(mcast, &mgid);
6277 	req = kmem_cache_alloc(state->id_req_kmc, KM_NOSLEEP);
6278 	if (req == NULL)
6279 		return (ENOMEM);
6280 
6281 	req->rq_gid = mgid;
6282 
6283 	if (add) {
6284 		DPRINT(1, "ibd_m_multicst : %016llx:%016llx\n",
6285 		    mgid.gid_prefix, mgid.gid_guid);
6286 		ibd_queue_work_slot(state, req, IBD_ASYNC_JOIN);
6287 	} else {
6288 		DPRINT(1, "ibd_m_multicst : unset_multicast : "
6289 		    "%016llx:%016llx", mgid.gid_prefix, mgid.gid_guid);
6290 		ibd_queue_work_slot(state, req, IBD_ASYNC_LEAVE);
6291 	}
6292 	return (0);
6293 }
6294 
6295 /*
6296  * The blocking part of the IBA promiscuous operations are done
6297  * out of here on the async thread. The dlpireq parameter indicates
6298  * whether this invocation is due to a dlpi request or due to
6299  * a port up/down event.
6300  */
6301 static void
ibd_async_unsetprom(ibd_state_t * state)6302 ibd_async_unsetprom(ibd_state_t *state)
6303 {
6304 	ibd_mce_t *mce = list_head(&state->id_mc_non);
6305 	ib_gid_t mgid;
6306 
6307 	DPRINT(2, "ibd_async_unsetprom : async_unset_promisc");
6308 
6309 	while (mce != NULL) {
6310 		mgid = mce->mc_info.mc_adds_vect.av_dgid;
6311 		mce = list_next(&state->id_mc_non, mce);
6312 		ibd_leave_group(state, mgid, IB_MC_JSTATE_NON);
6313 	}
6314 	state->id_prom_op = IBD_OP_NOTSTARTED;
6315 }
6316 
6317 /*
6318  * The blocking part of the IBA promiscuous operations are done
6319  * out of here on the async thread. The dlpireq parameter indicates
6320  * whether this invocation is due to a dlpi request or due to
6321  * a port up/down event.
6322  */
6323 static void
ibd_async_setprom(ibd_state_t * state)6324 ibd_async_setprom(ibd_state_t *state)
6325 {
6326 	ibt_mcg_attr_t mcg_attr;
6327 	ibt_mcg_info_t *mcg_info;
6328 	ib_gid_t mgid;
6329 	uint_t numg;
6330 	int i;
6331 	char ret = IBD_OP_COMPLETED;
6332 
6333 	DPRINT(2, "ibd_async_setprom : async_set_promisc");
6334 
6335 	/*
6336 	 * Obtain all active MC groups on the IB fabric with
6337 	 * specified criteria (scope + Pkey + Qkey + mtu).
6338 	 */
6339 	bzero(&mcg_attr, sizeof (mcg_attr));
6340 	mcg_attr.mc_pkey = state->id_pkey;
6341 	mcg_attr.mc_scope = state->id_scope;
6342 	mcg_attr.mc_qkey = state->id_mcinfo->mc_qkey;
6343 	mcg_attr.mc_mtu_req.r_mtu = state->id_mcinfo->mc_mtu;
6344 	mcg_attr.mc_mtu_req.r_selector = IBT_EQU;
6345 	if (ibt_query_mcg(state->id_sgid, &mcg_attr, 0, &mcg_info, &numg) !=
6346 	    IBT_SUCCESS) {
6347 		ibd_print_warn(state, "Could not get list of IBA multicast "
6348 		    "groups");
6349 		ret = IBD_OP_ERRORED;
6350 		goto done;
6351 	}
6352 
6353 	/*
6354 	 * Iterate over the returned mcg's and join as NonMember
6355 	 * to the IP mcg's.
6356 	 */
6357 	for (i = 0; i < numg; i++) {
6358 		/*
6359 		 * Do a NonMember JOIN on the MC group.
6360 		 */
6361 		mgid = mcg_info[i].mc_adds_vect.av_dgid;
6362 		if (ibd_join_group(state, mgid, IB_MC_JSTATE_NON) == NULL)
6363 			ibd_print_warn(state, "IBA promiscuous mode missed "
6364 			    "multicast gid %016llx:%016llx",
6365 			    (u_longlong_t)mgid.gid_prefix,
6366 			    (u_longlong_t)mgid.gid_guid);
6367 	}
6368 
6369 	ibt_free_mcg_info(mcg_info, numg);
6370 	DPRINT(4, "ibd_async_setprom : async_set_promisc completes");
6371 done:
6372 	state->id_prom_op = ret;
6373 }
6374 
6375 /*
6376  * GLDv3 entry point for multicast promiscuous enable/disable requests.
6377  * GLDv3 assumes phys state receives more packets than multi state,
6378  * which is not true for IPoIB. Thus, treat the multi and phys
6379  * promiscuous states the same way to work with GLDv3's assumption.
6380  */
6381 static int
ibd_m_promisc(void * arg,boolean_t on)6382 ibd_m_promisc(void *arg, boolean_t on)
6383 {
6384 	ibd_state_t *state = (ibd_state_t *)arg;
6385 	ibd_req_t *req;
6386 
6387 	if (state->id_type == IBD_PORT_DRIVER)
6388 		return (EINVAL);
6389 
6390 	/*
6391 	 * Async thread wouldn't have been started if we haven't
6392 	 * passed ibd_m_start()
6393 	 */
6394 	if ((state->id_mac_state & IBD_DRV_STARTED) == 0)
6395 		return (0);
6396 
6397 	req = kmem_cache_alloc(state->id_req_kmc, KM_NOSLEEP);
6398 	if (req == NULL)
6399 		return (ENOMEM);
6400 	if (on) {
6401 		DPRINT(1, "ibd_m_promisc : set_promisc : %d", on);
6402 		ibd_queue_work_slot(state, req, IBD_ASYNC_PROMON);
6403 	} else {
6404 		DPRINT(1, "ibd_m_promisc : unset_promisc");
6405 		ibd_queue_work_slot(state, req, IBD_ASYNC_PROMOFF);
6406 	}
6407 
6408 	return (0);
6409 }
6410 
6411 /*
6412  * GLDv3 entry point for gathering statistics.
6413  */
6414 static int
ibd_m_stat(void * arg,uint_t stat,uint64_t * val)6415 ibd_m_stat(void *arg, uint_t stat, uint64_t *val)
6416 {
6417 	ibd_state_t *state = (ibd_state_t *)arg;
6418 
6419 	switch (stat) {
6420 	case MAC_STAT_IFSPEED:
6421 		*val = state->id_link_speed;
6422 		break;
6423 	case MAC_STAT_MULTIRCV:
6424 		*val = state->id_multi_rcv;
6425 		break;
6426 	case MAC_STAT_BRDCSTRCV:
6427 		*val = state->id_brd_rcv;
6428 		break;
6429 	case MAC_STAT_MULTIXMT:
6430 		*val = state->id_multi_xmt;
6431 		break;
6432 	case MAC_STAT_BRDCSTXMT:
6433 		*val = state->id_brd_xmt;
6434 		break;
6435 	case MAC_STAT_RBYTES:
6436 		*val = state->id_rcv_bytes + state->rc_rcv_trans_byte
6437 		    + state->rc_rcv_copy_byte;
6438 		break;
6439 	case MAC_STAT_IPACKETS:
6440 		*val = state->id_rcv_pkt + state->rc_rcv_trans_pkt
6441 		    + state->rc_rcv_copy_pkt;
6442 		break;
6443 	case MAC_STAT_OBYTES:
6444 		*val = state->id_xmt_bytes + state->rc_xmt_bytes;
6445 		break;
6446 	case MAC_STAT_OPACKETS:
6447 		*val = state->id_xmt_pkt + state->rc_xmt_small_pkt +
6448 		    state->rc_xmt_fragmented_pkt +
6449 		    state->rc_xmt_map_fail_pkt + state->rc_xmt_map_succ_pkt;
6450 		break;
6451 	case MAC_STAT_OERRORS:
6452 		*val = state->id_ah_error;	/* failed AH translation */
6453 		break;
6454 	case MAC_STAT_IERRORS:
6455 		*val = 0;
6456 		break;
6457 	case MAC_STAT_NOXMTBUF:
6458 		*val = state->id_tx_short + state->rc_swqe_short +
6459 		    state->rc_xmt_buf_short;
6460 		break;
6461 	case MAC_STAT_NORCVBUF:
6462 	default:
6463 		return (ENOTSUP);
6464 	}
6465 
6466 	return (0);
6467 }
6468 
6469 static void
ibd_async_txsched(ibd_state_t * state)6470 ibd_async_txsched(ibd_state_t *state)
6471 {
6472 	ibd_resume_transmission(state);
6473 }
6474 
6475 static void
ibd_resume_transmission(ibd_state_t * state)6476 ibd_resume_transmission(ibd_state_t *state)
6477 {
6478 	int flag;
6479 	int met_thresh = 0;
6480 	int thresh = 0;
6481 	int ret = -1;
6482 
6483 	mutex_enter(&state->id_sched_lock);
6484 	if (state->id_sched_needed & IBD_RSRC_SWQE) {
6485 		mutex_enter(&state->id_tx_list.dl_mutex);
6486 		mutex_enter(&state->id_tx_rel_list.dl_mutex);
6487 		met_thresh = state->id_tx_list.dl_cnt +
6488 		    state->id_tx_rel_list.dl_cnt;
6489 		mutex_exit(&state->id_tx_rel_list.dl_mutex);
6490 		mutex_exit(&state->id_tx_list.dl_mutex);
6491 		thresh = IBD_FREE_SWQES_THRESH;
6492 		flag = IBD_RSRC_SWQE;
6493 	} else if (state->id_sched_needed & IBD_RSRC_LSOBUF) {
6494 		ASSERT(state->id_lso != NULL);
6495 		mutex_enter(&state->id_lso_lock);
6496 		met_thresh = state->id_lso->bkt_nfree;
6497 		thresh = IBD_FREE_LSOS_THRESH;
6498 		mutex_exit(&state->id_lso_lock);
6499 		flag = IBD_RSRC_LSOBUF;
6500 		if (met_thresh > thresh)
6501 			state->id_sched_lso_cnt++;
6502 	}
6503 	if (met_thresh > thresh) {
6504 		state->id_sched_needed &= ~flag;
6505 		state->id_sched_cnt++;
6506 		ret = 0;
6507 	}
6508 	mutex_exit(&state->id_sched_lock);
6509 
6510 	if (ret == 0)
6511 		mac_tx_update(state->id_mh);
6512 }
6513 
6514 /*
6515  * Release the send wqe back into free list.
6516  */
6517 static void
ibd_release_swqe(ibd_state_t * state,ibd_swqe_t * head,ibd_swqe_t * tail,int n)6518 ibd_release_swqe(ibd_state_t *state, ibd_swqe_t *head, ibd_swqe_t *tail, int n)
6519 {
6520 	/*
6521 	 * Add back on Tx list for reuse.
6522 	 */
6523 	ASSERT(tail->swqe_next == NULL);
6524 	mutex_enter(&state->id_tx_rel_list.dl_mutex);
6525 	state->id_tx_rel_list.dl_pending_sends = B_FALSE;
6526 	tail->swqe_next = state->id_tx_rel_list.dl_head;
6527 	state->id_tx_rel_list.dl_head = SWQE_TO_WQE(head);
6528 	state->id_tx_rel_list.dl_cnt += n;
6529 	mutex_exit(&state->id_tx_rel_list.dl_mutex);
6530 }
6531 
6532 /*
6533  * Acquire a send wqe from free list.
6534  * Returns error number and send wqe pointer.
6535  */
6536 static ibd_swqe_t *
ibd_acquire_swqe(ibd_state_t * state)6537 ibd_acquire_swqe(ibd_state_t *state)
6538 {
6539 	ibd_swqe_t *wqe;
6540 
6541 	mutex_enter(&state->id_tx_rel_list.dl_mutex);
6542 	if (state->id_tx_rel_list.dl_head != NULL) {
6543 		/* transfer id_tx_rel_list to id_tx_list */
6544 		state->id_tx_list.dl_head =
6545 		    state->id_tx_rel_list.dl_head;
6546 		state->id_tx_list.dl_cnt =
6547 		    state->id_tx_rel_list.dl_cnt;
6548 		state->id_tx_list.dl_pending_sends = B_FALSE;
6549 
6550 		/* clear id_tx_rel_list */
6551 		state->id_tx_rel_list.dl_head = NULL;
6552 		state->id_tx_rel_list.dl_cnt = 0;
6553 		mutex_exit(&state->id_tx_rel_list.dl_mutex);
6554 
6555 		wqe = WQE_TO_SWQE(state->id_tx_list.dl_head);
6556 		state->id_tx_list.dl_cnt -= 1;
6557 		state->id_tx_list.dl_head = wqe->swqe_next;
6558 	} else {	/* no free swqe */
6559 		mutex_exit(&state->id_tx_rel_list.dl_mutex);
6560 		state->id_tx_list.dl_pending_sends = B_TRUE;
6561 		DPRINT(5, "ibd_acquire_swqe: out of Tx wqe");
6562 		state->id_tx_short++;
6563 		wqe = NULL;
6564 	}
6565 	return (wqe);
6566 }
6567 
6568 static int
ibd_setup_lso(ibd_swqe_t * node,mblk_t * mp,uint32_t mss,ibt_ud_dest_hdl_t ud_dest)6569 ibd_setup_lso(ibd_swqe_t *node, mblk_t *mp, uint32_t mss,
6570     ibt_ud_dest_hdl_t ud_dest)
6571 {
6572 	mblk_t	*nmp;
6573 	int iph_len, tcph_len;
6574 	ibt_wr_lso_t *lso;
6575 	uintptr_t ip_start, tcp_start;
6576 	uint8_t *dst;
6577 	uint_t pending, mblen;
6578 
6579 	/*
6580 	 * The code in ibd_send would've set 'wr.ud.udwr_dest' by default;
6581 	 * we need to adjust it here for lso.
6582 	 */
6583 	lso = &(node->w_swr.wr.ud_lso);
6584 	lso->lso_ud_dest = ud_dest;
6585 	lso->lso_mss = mss;
6586 
6587 	/*
6588 	 * Calculate the LSO header size and set it in the UD LSO structure.
6589 	 * Note that the only assumption we make is that each of the IPoIB,
6590 	 * IP and TCP headers will be contained in a single mblk fragment;
6591 	 * together, the headers may span multiple mblk fragments.
6592 	 */
6593 	nmp = mp;
6594 	ip_start = (uintptr_t)(nmp->b_rptr) + IPOIB_HDRSIZE;
6595 	if (ip_start >= (uintptr_t)(nmp->b_wptr)) {
6596 		ip_start = (uintptr_t)nmp->b_cont->b_rptr
6597 		    + (ip_start - (uintptr_t)(nmp->b_wptr));
6598 		nmp = nmp->b_cont;
6599 
6600 	}
6601 	iph_len = IPH_HDR_LENGTH((ipha_t *)ip_start);
6602 
6603 	tcp_start = ip_start + iph_len;
6604 	if (tcp_start >= (uintptr_t)(nmp->b_wptr)) {
6605 		tcp_start = (uintptr_t)nmp->b_cont->b_rptr
6606 		    + (tcp_start - (uintptr_t)(nmp->b_wptr));
6607 		nmp = nmp->b_cont;
6608 	}
6609 	tcph_len = TCP_HDR_LENGTH((tcph_t *)tcp_start);
6610 	lso->lso_hdr_sz = IPOIB_HDRSIZE + iph_len + tcph_len;
6611 
6612 	/*
6613 	 * If the lso header fits entirely within a single mblk fragment,
6614 	 * we'll avoid an additional copy of the lso header here and just
6615 	 * pass the b_rptr of the mblk directly.
6616 	 *
6617 	 * If this isn't true, we'd have to allocate for it explicitly.
6618 	 */
6619 	if (lso->lso_hdr_sz <= MBLKL(mp)) {
6620 		lso->lso_hdr = mp->b_rptr;
6621 	} else {
6622 		/* On work completion, remember to free this allocated hdr */
6623 		lso->lso_hdr = kmem_zalloc(lso->lso_hdr_sz, KM_NOSLEEP);
6624 		if (lso->lso_hdr == NULL) {
6625 			DPRINT(10, "ibd_setup_lso: couldn't allocate lso hdr, "
6626 			    "sz = %d", lso->lso_hdr_sz);
6627 			lso->lso_hdr_sz = 0;
6628 			lso->lso_mss = 0;
6629 			return (-1);
6630 		}
6631 	}
6632 
6633 	/*
6634 	 * Copy in the lso header only if we need to
6635 	 */
6636 	if (lso->lso_hdr != mp->b_rptr) {
6637 		dst = lso->lso_hdr;
6638 		pending = lso->lso_hdr_sz;
6639 
6640 		for (nmp = mp; nmp && pending; nmp = nmp->b_cont) {
6641 			mblen = MBLKL(nmp);
6642 			if (pending > mblen) {
6643 				bcopy(nmp->b_rptr, dst, mblen);
6644 				dst += mblen;
6645 				pending -= mblen;
6646 			} else {
6647 				bcopy(nmp->b_rptr, dst, pending);
6648 				break;
6649 			}
6650 		}
6651 	}
6652 
6653 	return (0);
6654 }
6655 
6656 static void
ibd_free_lsohdr(ibd_swqe_t * node,mblk_t * mp)6657 ibd_free_lsohdr(ibd_swqe_t *node, mblk_t *mp)
6658 {
6659 	ibt_wr_lso_t *lso;
6660 
6661 	if ((!node) || (!mp))
6662 		return;
6663 
6664 	/*
6665 	 * Free any header space that we might've allocated if we
6666 	 * did an LSO
6667 	 */
6668 	if (node->w_swr.wr_opcode == IBT_WRC_SEND_LSO) {
6669 		lso = &(node->w_swr.wr.ud_lso);
6670 		if ((lso->lso_hdr) && (lso->lso_hdr != mp->b_rptr)) {
6671 			kmem_free(lso->lso_hdr, lso->lso_hdr_sz);
6672 			lso->lso_hdr = NULL;
6673 			lso->lso_hdr_sz = 0;
6674 		}
6675 	}
6676 }
6677 
6678 static void
ibd_post_send(ibd_state_t * state,ibd_swqe_t * node)6679 ibd_post_send(ibd_state_t *state, ibd_swqe_t *node)
6680 {
6681 	uint_t		i;
6682 	uint_t		num_posted;
6683 	uint_t		n_wrs;
6684 	ibt_status_t	ibt_status;
6685 	ibt_send_wr_t	wrs[IBD_MAX_TX_POST_MULTIPLE];
6686 	ibd_swqe_t	*tx_head, *elem;
6687 	ibd_swqe_t	*nodes[IBD_MAX_TX_POST_MULTIPLE];
6688 
6689 	/* post the one request, then check for more */
6690 	ibt_status = ibt_post_send(state->id_chnl_hdl,
6691 	    &node->w_swr, 1, NULL);
6692 	if (ibt_status != IBT_SUCCESS) {
6693 		ibd_print_warn(state, "ibd_post_send: "
6694 		    "posting one wr failed: ret=%d", ibt_status);
6695 		ibd_tx_cleanup(state, node);
6696 	}
6697 
6698 	tx_head = NULL;
6699 	for (;;) {
6700 		if (tx_head == NULL) {
6701 			mutex_enter(&state->id_txpost_lock);
6702 			tx_head = state->id_tx_head;
6703 			if (tx_head == NULL) {
6704 				state->id_tx_busy = 0;
6705 				mutex_exit(&state->id_txpost_lock);
6706 				return;
6707 			}
6708 			state->id_tx_head = NULL;
6709 			mutex_exit(&state->id_txpost_lock);
6710 		}
6711 
6712 		/*
6713 		 * Collect pending requests, IBD_MAX_TX_POST_MULTIPLE wrs
6714 		 * at a time if possible, and keep posting them.
6715 		 */
6716 		for (n_wrs = 0, elem = tx_head;
6717 		    (elem) && (n_wrs < IBD_MAX_TX_POST_MULTIPLE);
6718 		    elem = WQE_TO_SWQE(elem->swqe_next), n_wrs++) {
6719 			nodes[n_wrs] = elem;
6720 			wrs[n_wrs] = elem->w_swr;
6721 		}
6722 		tx_head = elem;
6723 
6724 		ASSERT(n_wrs != 0);
6725 
6726 		/*
6727 		 * If posting fails for some reason, we'll never receive
6728 		 * completion intimation, so we'll need to cleanup. But
6729 		 * we need to make sure we don't clean up nodes whose
6730 		 * wrs have been successfully posted. We assume that the
6731 		 * hca driver returns on the first failure to post and
6732 		 * therefore the first 'num_posted' entries don't need
6733 		 * cleanup here.
6734 		 */
6735 		num_posted = 0;
6736 		ibt_status = ibt_post_send(state->id_chnl_hdl,
6737 		    wrs, n_wrs, &num_posted);
6738 		if (ibt_status != IBT_SUCCESS) {
6739 			ibd_print_warn(state, "ibd_post_send: "
6740 			    "posting multiple wrs failed: "
6741 			    "requested=%d, done=%d, ret=%d",
6742 			    n_wrs, num_posted, ibt_status);
6743 
6744 			for (i = num_posted; i < n_wrs; i++)
6745 				ibd_tx_cleanup(state, nodes[i]);
6746 		}
6747 	}
6748 }
6749 
6750 static int
ibd_prepare_sgl(ibd_state_t * state,mblk_t * mp,ibd_swqe_t * node,uint_t lsohdr_sz)6751 ibd_prepare_sgl(ibd_state_t *state, mblk_t *mp, ibd_swqe_t *node,
6752     uint_t lsohdr_sz)
6753 {
6754 	ibt_wr_ds_t *sgl;
6755 	ibt_status_t ibt_status;
6756 	mblk_t *nmp;
6757 	mblk_t *data_mp;
6758 	uchar_t *bufp;
6759 	size_t blksize;
6760 	size_t skip;
6761 	size_t avail;
6762 	uint_t pktsize;
6763 	uint_t frag_len;
6764 	uint_t pending_hdr;
6765 	int nmblks;
6766 	int i;
6767 
6768 	/*
6769 	 * Let's skip ahead to the data if this is LSO
6770 	 */
6771 	data_mp = mp;
6772 	pending_hdr = 0;
6773 	if (lsohdr_sz) {
6774 		pending_hdr = lsohdr_sz;
6775 		for (nmp = mp; nmp; nmp = nmp->b_cont) {
6776 			frag_len = nmp->b_wptr - nmp->b_rptr;
6777 			if (frag_len > pending_hdr)
6778 				break;
6779 			pending_hdr -= frag_len;
6780 		}
6781 		data_mp = nmp;	/* start of data past lso header */
6782 		ASSERT(data_mp != NULL);
6783 	}
6784 
6785 	/*
6786 	 * Calculate the size of message data and number of msg blocks
6787 	 */
6788 	pktsize = 0;
6789 	for (nmblks = 0, nmp = data_mp; nmp != NULL;
6790 	    nmp = nmp->b_cont, nmblks++) {
6791 		pktsize += MBLKL(nmp);
6792 	}
6793 	pktsize -= pending_hdr;
6794 
6795 	/*
6796 	 * We only do ibt_map_mem_iov() if the pktsize is above the
6797 	 * "copy-threshold", and if the number of mp fragments is less than
6798 	 * the maximum acceptable.
6799 	 */
6800 	if ((state->id_hca_res_lkey_capab) &&
6801 	    (pktsize > state->id_ud_tx_copy_thresh) &&
6802 	    (nmblks < state->id_max_sqseg_hiwm)) {
6803 		ibt_iov_t iov_arr[IBD_MAX_SQSEG];
6804 		ibt_iov_attr_t iov_attr;
6805 
6806 		iov_attr.iov_as = NULL;
6807 		iov_attr.iov = iov_arr;
6808 		iov_attr.iov_buf = NULL;
6809 		iov_attr.iov_list_len = nmblks;
6810 		iov_attr.iov_wr_nds = state->id_max_sqseg;
6811 		iov_attr.iov_lso_hdr_sz = lsohdr_sz;
6812 		iov_attr.iov_flags = IBT_IOV_SLEEP;
6813 
6814 		for (nmp = data_mp, i = 0; i < nmblks; i++, nmp = nmp->b_cont) {
6815 			iov_arr[i].iov_addr = (caddr_t)(void *)nmp->b_rptr;
6816 			iov_arr[i].iov_len = MBLKL(nmp);
6817 			if (i == 0) {
6818 				iov_arr[i].iov_addr += pending_hdr;
6819 				iov_arr[i].iov_len -= pending_hdr;
6820 			}
6821 		}
6822 
6823 		node->w_buftype = IBD_WQE_MAPPED;
6824 		node->w_swr.wr_sgl = node->w_sgl;
6825 
6826 		ibt_status = ibt_map_mem_iov(state->id_hca_hdl, &iov_attr,
6827 		    (ibt_all_wr_t *)&node->w_swr, &node->w_mi_hdl);
6828 		if (ibt_status != IBT_SUCCESS) {
6829 			ibd_print_warn(state, "ibd_send: ibt_map_mem_iov "
6830 			    "failed, nmblks=%d, ret=%d\n", nmblks, ibt_status);
6831 			goto ibd_copy_path;
6832 		}
6833 
6834 		return (0);
6835 	}
6836 
6837 ibd_copy_path:
6838 	if (pktsize <= state->id_tx_buf_sz) {
6839 		node->swqe_copybuf.ic_sgl.ds_len = pktsize;
6840 		node->w_swr.wr_nds = 1;
6841 		node->w_swr.wr_sgl = &node->swqe_copybuf.ic_sgl;
6842 		node->w_buftype = IBD_WQE_TXBUF;
6843 
6844 		/*
6845 		 * Even though this is the copy path for transfers less than
6846 		 * id_tx_buf_sz, it could still be an LSO packet.  If so, it
6847 		 * is possible the first data mblk fragment (data_mp) still
6848 		 * contains part of the LSO header that we need to skip.
6849 		 */
6850 		bufp = (uchar_t *)(uintptr_t)node->w_swr.wr_sgl->ds_va;
6851 		for (nmp = data_mp; nmp != NULL; nmp = nmp->b_cont) {
6852 			blksize = MBLKL(nmp) - pending_hdr;
6853 			bcopy(nmp->b_rptr + pending_hdr, bufp, blksize);
6854 			bufp += blksize;
6855 			pending_hdr = 0;
6856 		}
6857 
6858 		return (0);
6859 	}
6860 
6861 	/*
6862 	 * Copy path for transfers greater than id_tx_buf_sz
6863 	 */
6864 	node->w_swr.wr_sgl = node->w_sgl;
6865 	if (ibd_acquire_lsobufs(state, pktsize,
6866 	    node->w_swr.wr_sgl, &(node->w_swr.wr_nds)) != 0) {
6867 		DPRINT(10, "ibd_prepare_sgl: lso bufs acquire failed");
6868 		return (-1);
6869 	}
6870 	node->w_buftype = IBD_WQE_LSOBUF;
6871 
6872 	/*
6873 	 * Copy the larger-than-id_tx_buf_sz packet into a set of
6874 	 * fixed-sized, pre-mapped LSO buffers. Note that we might
6875 	 * need to skip part of the LSO header in the first fragment
6876 	 * as before.
6877 	 */
6878 	nmp = data_mp;
6879 	skip = pending_hdr;
6880 	for (i = 0; i < node->w_swr.wr_nds; i++) {
6881 		sgl = node->w_swr.wr_sgl + i;
6882 		bufp = (uchar_t *)(uintptr_t)sgl->ds_va;
6883 		avail = IBD_LSO_BUFSZ;
6884 		while (nmp && avail) {
6885 			blksize = MBLKL(nmp) - skip;
6886 			if (blksize > avail) {
6887 				bcopy(nmp->b_rptr + skip, bufp, avail);
6888 				skip += avail;
6889 				avail = 0;
6890 			} else {
6891 				bcopy(nmp->b_rptr + skip, bufp, blksize);
6892 				skip = 0;
6893 				avail -= blksize;
6894 				bufp += blksize;
6895 				nmp = nmp->b_cont;
6896 			}
6897 		}
6898 	}
6899 
6900 	return (0);
6901 }
6902 
6903 /*
6904  * Schedule a completion queue polling to reap the resource we're
6905  * short on.  If we implement the change to reap tx completions
6906  * in a separate thread, we'll need to wake up that thread here.
6907  */
6908 static int
ibd_sched_poll(ibd_state_t * state,int resource_type,int q_flag)6909 ibd_sched_poll(ibd_state_t *state, int resource_type, int q_flag)
6910 {
6911 	ibd_req_t *req;
6912 
6913 	mutex_enter(&state->id_sched_lock);
6914 	state->id_sched_needed |= resource_type;
6915 	mutex_exit(&state->id_sched_lock);
6916 
6917 	/*
6918 	 * If we are asked to queue a work entry, we need to do it
6919 	 */
6920 	if (q_flag) {
6921 		req = kmem_cache_alloc(state->id_req_kmc, KM_NOSLEEP);
6922 		if (req == NULL)
6923 			return (-1);
6924 
6925 		ibd_queue_work_slot(state, req, IBD_ASYNC_SCHED);
6926 	}
6927 
6928 	return (0);
6929 }
6930 
6931 /*
6932  * The passed in packet has this format:
6933  * IPOIB_ADDRL b dest addr :: 2b sap :: 2b 0's :: data
6934  */
6935 static boolean_t
ibd_send(ibd_state_t * state,mblk_t * mp)6936 ibd_send(ibd_state_t *state, mblk_t *mp)
6937 {
6938 	ibd_ace_t *ace;
6939 	ibd_swqe_t *node;
6940 	ipoib_mac_t *dest;
6941 	ib_header_info_t *ipibp;
6942 	ip6_t *ip6h;
6943 	uint_t pktsize;
6944 	uint32_t mss;
6945 	uint32_t hckflags;
6946 	uint32_t lsoflags = 0;
6947 	uint_t lsohdr_sz = 0;
6948 	int ret, len;
6949 	boolean_t dofree = B_FALSE;
6950 	boolean_t rc;
6951 	/* if (rc_chan == NULL) send by UD; else send by RC; */
6952 	ibd_rc_chan_t *rc_chan;
6953 	int nmblks;
6954 	mblk_t *nmp;
6955 
6956 	/*
6957 	 * If we aren't done with the device initialization and start,
6958 	 * we shouldn't be here.
6959 	 */
6960 	if ((state->id_mac_state & IBD_DRV_STARTED) == 0)
6961 		return (B_FALSE);
6962 
6963 	/*
6964 	 * Obtain an address handle for the destination.
6965 	 */
6966 	ipibp = (ib_header_info_t *)mp->b_rptr;
6967 	dest = (ipoib_mac_t *)&ipibp->ib_dst;
6968 	if ((ntohl(dest->ipoib_qpn) & IB_QPN_MASK) == IB_MC_QPN)
6969 		IBD_FILL_SCOPE_PKEY(dest, state->id_scope, state->id_pkey);
6970 
6971 	rc_chan = NULL;
6972 	ace = ibd_acache_lookup(state, dest, &ret, 1);
6973 	if (state->id_enable_rc && (ace != NULL) &&
6974 	    (ace->ac_mac.ipoib_qpn != htonl(IB_MC_QPN))) {
6975 		if (ace->ac_chan == NULL) {
6976 			state->rc_null_conn++;
6977 		} else {
6978 			if (ace->ac_chan->chan_state ==
6979 			    IBD_RC_STATE_ACT_ESTAB) {
6980 				rc_chan = ace->ac_chan;
6981 				rc_chan->is_used = B_TRUE;
6982 				mutex_enter(&rc_chan->tx_wqe_list.dl_mutex);
6983 				node = WQE_TO_SWQE(
6984 				    rc_chan->tx_wqe_list.dl_head);
6985 				if (node != NULL) {
6986 					rc_chan->tx_wqe_list.dl_cnt -= 1;
6987 					rc_chan->tx_wqe_list.dl_head =
6988 					    node->swqe_next;
6989 				} else {
6990 					node = ibd_rc_acquire_swqes(rc_chan);
6991 				}
6992 				mutex_exit(&rc_chan->tx_wqe_list.dl_mutex);
6993 
6994 				if (node == NULL) {
6995 					state->rc_swqe_short++;
6996 					mutex_enter(&state->id_sched_lock);
6997 					state->id_sched_needed |=
6998 					    IBD_RSRC_RC_SWQE;
6999 					mutex_exit(&state->id_sched_lock);
7000 					ibd_dec_ref_ace(state, ace);
7001 					return (B_FALSE);
7002 				}
7003 			} else {
7004 				state->rc_no_estab_conn++;
7005 			}
7006 		}
7007 	}
7008 
7009 	if (rc_chan == NULL) {
7010 		mutex_enter(&state->id_tx_list.dl_mutex);
7011 		node = WQE_TO_SWQE(state->id_tx_list.dl_head);
7012 		if (node != NULL) {
7013 			state->id_tx_list.dl_cnt -= 1;
7014 			state->id_tx_list.dl_head = node->swqe_next;
7015 		} else {
7016 			node = ibd_acquire_swqe(state);
7017 		}
7018 		mutex_exit(&state->id_tx_list.dl_mutex);
7019 		if (node == NULL) {
7020 			/*
7021 			 * If we don't have an swqe available, schedule a
7022 			 * transmit completion queue cleanup and hold off on
7023 			 * sending more packets until we have some free swqes
7024 			 */
7025 			if (ibd_sched_poll(state, IBD_RSRC_SWQE, 0) == 0) {
7026 				if (ace != NULL) {
7027 					ibd_dec_ref_ace(state, ace);
7028 				}
7029 				return (B_FALSE);
7030 			}
7031 
7032 			/*
7033 			 * If a poll cannot be scheduled, we have no choice but
7034 			 * to drop this packet
7035 			 */
7036 			ibd_print_warn(state, "ibd_send: no swqe, pkt drop");
7037 			if (ace != NULL) {
7038 				ibd_dec_ref_ace(state, ace);
7039 			}
7040 			return (B_TRUE);
7041 		}
7042 	}
7043 
7044 	/*
7045 	 * Initialize the commonly used fields in swqe to NULL to protect
7046 	 * against ibd_tx_cleanup accidentally misinterpreting these on a
7047 	 * failure.
7048 	 */
7049 	node->swqe_im_mblk = NULL;
7050 	node->w_swr.wr_nds = 0;
7051 	node->w_swr.wr_sgl = NULL;
7052 	node->w_swr.wr_opcode = IBT_WRC_SEND;
7053 
7054 	/*
7055 	 * Calculate the size of message data and number of msg blocks
7056 	 */
7057 	pktsize = 0;
7058 	for (nmblks = 0, nmp = mp; nmp != NULL;
7059 	    nmp = nmp->b_cont, nmblks++) {
7060 		pktsize += MBLKL(nmp);
7061 	}
7062 
7063 	if (bcmp(&ipibp->ib_dst, &state->id_bcaddr, IPOIB_ADDRL) == 0)
7064 		atomic_inc_64(&state->id_brd_xmt);
7065 	else if ((ntohl(ipibp->ib_dst.ipoib_qpn) & IB_QPN_MASK) == IB_MC_QPN)
7066 		atomic_inc_64(&state->id_multi_xmt);
7067 
7068 	if (ace != NULL) {
7069 		node->w_ahandle = ace;
7070 		node->w_swr.wr.ud.udwr_dest = ace->ac_dest;
7071 	} else {
7072 		DPRINT(5,
7073 		    "ibd_send: acache lookup %s for %08X:%08X:%08X:%08X:%08X",
7074 		    ((ret == EFAULT) ? "failed" : "queued"),
7075 		    htonl(dest->ipoib_qpn), htonl(dest->ipoib_gidpref[0]),
7076 		    htonl(dest->ipoib_gidpref[1]),
7077 		    htonl(dest->ipoib_gidsuff[0]),
7078 		    htonl(dest->ipoib_gidsuff[1]));
7079 		state->rc_ace_not_found++;
7080 		node->w_ahandle = NULL;
7081 
7082 		/*
7083 		 * Here if ibd_acache_lookup() returns EFAULT, it means ibd
7084 		 * can not find a path for the specific dest address. We
7085 		 * should get rid of this kind of packet.  We also should get
7086 		 * rid of the packet if we cannot schedule a poll via the
7087 		 * async thread.  For the normal case, ibd will return the
7088 		 * packet to upper layer and wait for AH creating.
7089 		 *
7090 		 * Note that we always queue a work slot entry for the async
7091 		 * thread when we fail AH lookup (even in intr mode); this is
7092 		 * due to the convoluted way the code currently looks for AH.
7093 		 */
7094 		if (ret == EFAULT) {
7095 			dofree = B_TRUE;
7096 			rc = B_TRUE;
7097 		} else if (ibd_sched_poll(state, IBD_RSRC_SWQE, 1) != 0) {
7098 			dofree = B_TRUE;
7099 			rc = B_TRUE;
7100 		} else {
7101 			dofree = B_FALSE;
7102 			rc = B_FALSE;
7103 		}
7104 		goto ibd_send_fail;
7105 	}
7106 
7107 	/*
7108 	 * For ND6 packets, padding is at the front of the source lladdr.
7109 	 * Insert the padding at front.
7110 	 */
7111 	if (ntohs(ipibp->ipib_rhdr.ipoib_type) == ETHERTYPE_IPV6) {
7112 		if (MBLKL(mp) < sizeof (ib_header_info_t) + IPV6_HDR_LEN) {
7113 			if (!pullupmsg(mp, IPV6_HDR_LEN +
7114 			    sizeof (ib_header_info_t))) {
7115 				DPRINT(10, "ibd_send: pullupmsg failure ");
7116 				dofree = B_TRUE;
7117 				rc = B_TRUE;
7118 				goto ibd_send_fail;
7119 			}
7120 			ipibp = (ib_header_info_t *)mp->b_rptr;
7121 		}
7122 		ip6h = (ip6_t *)((uchar_t *)ipibp +
7123 		    sizeof (ib_header_info_t));
7124 		len = ntohs(ip6h->ip6_plen);
7125 		if (ip6h->ip6_nxt == IPPROTO_ICMPV6) {
7126 			mblk_t	*pad;
7127 
7128 			pad = allocb(4, 0);
7129 			pad->b_wptr = (uchar_t *)pad->b_rptr + 4;
7130 			linkb(mp, pad);
7131 			if (MBLKL(mp) < sizeof (ib_header_info_t) +
7132 			    IPV6_HDR_LEN + len + 4) {
7133 				if (!pullupmsg(mp, sizeof (ib_header_info_t) +
7134 				    IPV6_HDR_LEN + len + 4)) {
7135 					DPRINT(10, "ibd_send: pullupmsg "
7136 					    "failure ");
7137 					dofree = B_TRUE;
7138 					rc = B_TRUE;
7139 					goto ibd_send_fail;
7140 				}
7141 				ip6h = (ip6_t *)((uchar_t *)mp->b_rptr +
7142 				    sizeof (ib_header_info_t));
7143 			}
7144 
7145 			/* LINTED: E_CONSTANT_CONDITION */
7146 			IBD_PAD_NSNA(ip6h, len, IBD_SEND);
7147 		}
7148 	}
7149 
7150 	ASSERT(mp->b_wptr - mp->b_rptr >= sizeof (ib_addrs_t));
7151 	mp->b_rptr += sizeof (ib_addrs_t);
7152 	pktsize -= sizeof (ib_addrs_t);
7153 
7154 	if (rc_chan) {	/* send in RC mode */
7155 		ibt_iov_t iov_arr[IBD_MAX_SQSEG];
7156 		ibt_iov_attr_t iov_attr;
7157 		uint_t		i;
7158 		size_t	blksize;
7159 		uchar_t *bufp;
7160 		ibd_rc_tx_largebuf_t *lbufp;
7161 
7162 		atomic_add_64(&state->rc_xmt_bytes, pktsize);
7163 
7164 		/*
7165 		 * Upper layer does Tx checksum, we don't need do any
7166 		 * checksum here.
7167 		 */
7168 		ASSERT(node->w_swr.wr_trans == IBT_RC_SRV);
7169 
7170 		/*
7171 		 * We only do ibt_map_mem_iov() if the pktsize is above
7172 		 * the "copy-threshold", and if the number of mp
7173 		 * fragments is less than the maximum acceptable.
7174 		 */
7175 		if (pktsize <= state->id_rc_tx_copy_thresh) {
7176 			atomic_inc_64(&state->rc_xmt_small_pkt);
7177 			/*
7178 			 * Only process unicast packet in Reliable Connected
7179 			 * mode.
7180 			 */
7181 			node->swqe_copybuf.ic_sgl.ds_len = pktsize;
7182 			node->w_swr.wr_nds = 1;
7183 			node->w_swr.wr_sgl = &node->swqe_copybuf.ic_sgl;
7184 			node->w_buftype = IBD_WQE_TXBUF;
7185 
7186 			bufp = (uchar_t *)(uintptr_t)node->w_swr.wr_sgl->ds_va;
7187 			for (nmp = mp; nmp != NULL; nmp = nmp->b_cont) {
7188 				blksize = MBLKL(nmp);
7189 				bcopy(nmp->b_rptr, bufp, blksize);
7190 				bufp += blksize;
7191 			}
7192 			freemsg(mp);
7193 			ASSERT(node->swqe_im_mblk == NULL);
7194 		} else {
7195 			if ((state->rc_enable_iov_map) &&
7196 			    (nmblks < state->rc_max_sqseg_hiwm)) {
7197 
7198 				/* do ibt_map_mem_iov() */
7199 				iov_attr.iov_as = NULL;
7200 				iov_attr.iov = iov_arr;
7201 				iov_attr.iov_buf = NULL;
7202 				iov_attr.iov_wr_nds = state->rc_tx_max_sqseg;
7203 				iov_attr.iov_lso_hdr_sz = 0;
7204 				iov_attr.iov_flags = IBT_IOV_SLEEP;
7205 
7206 				i = 0;
7207 				for (nmp = mp; nmp != NULL; nmp = nmp->b_cont) {
7208 					iov_arr[i].iov_len = MBLKL(nmp);
7209 					if (iov_arr[i].iov_len != 0) {
7210 						iov_arr[i].iov_addr = (caddr_t)
7211 						    (void *)nmp->b_rptr;
7212 						i++;
7213 					}
7214 				}
7215 				iov_attr.iov_list_len = i;
7216 				node->w_swr.wr_sgl = node->w_sgl;
7217 
7218 				ret = ibt_map_mem_iov(state->id_hca_hdl,
7219 				    &iov_attr, (ibt_all_wr_t *)&node->w_swr,
7220 				    &node->w_mi_hdl);
7221 				if (ret != IBT_SUCCESS) {
7222 					atomic_inc_64(
7223 					    &state->rc_xmt_map_fail_pkt);
7224 					DPRINT(30, "ibd_send: ibt_map_mem_iov("
7225 					    ") failed, nmblks=%d, real_nmblks"
7226 					    "=%d, ret=0x%x", nmblks, i, ret);
7227 					goto ibd_rc_large_copy;
7228 				}
7229 
7230 				atomic_inc_64(&state->rc_xmt_map_succ_pkt);
7231 				node->w_buftype = IBD_WQE_MAPPED;
7232 				node->swqe_im_mblk = mp;
7233 			} else {
7234 				atomic_inc_64(&state->rc_xmt_fragmented_pkt);
7235 ibd_rc_large_copy:
7236 				mutex_enter(&state->rc_tx_large_bufs_lock);
7237 				if (state->rc_tx_largebuf_nfree == 0) {
7238 					state->rc_xmt_buf_short++;
7239 					mutex_exit
7240 					    (&state->rc_tx_large_bufs_lock);
7241 					mutex_enter(&state->id_sched_lock);
7242 					state->id_sched_needed |=
7243 					    IBD_RSRC_RC_TX_LARGEBUF;
7244 					mutex_exit(&state->id_sched_lock);
7245 					dofree = B_FALSE;
7246 					rc = B_FALSE;
7247 					/*
7248 					 * If we don't have Tx large bufs,
7249 					 * return failure. node->w_buftype
7250 					 * should not be IBD_WQE_RC_COPYBUF,
7251 					 * otherwise it will cause problem
7252 					 * in ibd_rc_tx_cleanup()
7253 					 */
7254 					node->w_buftype = IBD_WQE_TXBUF;
7255 					goto ibd_send_fail;
7256 				}
7257 
7258 				lbufp = state->rc_tx_largebuf_free_head;
7259 				ASSERT(lbufp->lb_buf != NULL);
7260 				state->rc_tx_largebuf_free_head =
7261 				    lbufp->lb_next;
7262 				lbufp->lb_next = NULL;
7263 				/* Update nfree count */
7264 				state->rc_tx_largebuf_nfree --;
7265 				mutex_exit(&state->rc_tx_large_bufs_lock);
7266 				bufp = lbufp->lb_buf;
7267 				node->w_sgl[0].ds_va =
7268 				    (ib_vaddr_t)(uintptr_t)bufp;
7269 				node->w_sgl[0].ds_key =
7270 				    state->rc_tx_mr_desc.md_lkey;
7271 				node->w_sgl[0].ds_len = pktsize;
7272 				node->w_swr.wr_sgl = node->w_sgl;
7273 				node->w_swr.wr_nds = 1;
7274 				node->w_buftype = IBD_WQE_RC_COPYBUF;
7275 				node->w_rc_tx_largebuf = lbufp;
7276 
7277 				for (nmp = mp; nmp != NULL; nmp = nmp->b_cont) {
7278 					blksize = MBLKL(nmp);
7279 					if (blksize != 0) {
7280 						bcopy(nmp->b_rptr, bufp,
7281 						    blksize);
7282 						bufp += blksize;
7283 					}
7284 				}
7285 				freemsg(mp);
7286 				ASSERT(node->swqe_im_mblk == NULL);
7287 			}
7288 		}
7289 
7290 		node->swqe_next = NULL;
7291 		mutex_enter(&rc_chan->tx_post_lock);
7292 		if (rc_chan->tx_busy) {
7293 			if (rc_chan->tx_head) {
7294 				rc_chan->tx_tail->swqe_next =
7295 				    SWQE_TO_WQE(node);
7296 			} else {
7297 				rc_chan->tx_head = node;
7298 			}
7299 			rc_chan->tx_tail = node;
7300 			mutex_exit(&rc_chan->tx_post_lock);
7301 		} else {
7302 			rc_chan->tx_busy = 1;
7303 			mutex_exit(&rc_chan->tx_post_lock);
7304 			ibd_rc_post_send(rc_chan, node);
7305 		}
7306 
7307 		return (B_TRUE);
7308 	} /* send by RC */
7309 
7310 	if ((state->id_enable_rc) && (pktsize > state->id_mtu)) {
7311 		/*
7312 		 * Too long pktsize. The packet size from GLD should <=
7313 		 * state->id_mtu + sizeof (ib_addrs_t)
7314 		 */
7315 		if (ace->ac_mac.ipoib_qpn != htonl(IB_MC_QPN)) {
7316 			ibd_req_t *req;
7317 
7318 			mutex_enter(&ace->tx_too_big_mutex);
7319 			if (ace->tx_too_big_ongoing) {
7320 				mutex_exit(&ace->tx_too_big_mutex);
7321 				state->rc_xmt_reenter_too_long_pkt++;
7322 				dofree = B_TRUE;
7323 			} else {
7324 				ace->tx_too_big_ongoing = B_TRUE;
7325 				mutex_exit(&ace->tx_too_big_mutex);
7326 				state->rc_xmt_icmp_too_long_pkt++;
7327 
7328 				req = kmem_cache_alloc(state->id_req_kmc,
7329 				    KM_NOSLEEP);
7330 				if (req == NULL) {
7331 					ibd_print_warn(state, "ibd_send: alloc "
7332 					    "ibd_req_t fail");
7333 					/* Drop it. */
7334 					dofree = B_TRUE;
7335 				} else {
7336 					req->rq_ptr = mp;
7337 					req->rq_ptr2 = ace;
7338 					ibd_queue_work_slot(state, req,
7339 					    IBD_ASYNC_RC_TOO_BIG);
7340 					dofree = B_FALSE;
7341 				}
7342 			}
7343 		} else {
7344 			ibd_print_warn(state, "Reliable Connected mode is on. "
7345 			    "Multicast packet length %d > %d is too long to "
7346 			    "send packet (%d > %d), drop it",
7347 			    pktsize, state->id_mtu);
7348 			state->rc_xmt_drop_too_long_pkt++;
7349 			/* Drop it. */
7350 			dofree = B_TRUE;
7351 		}
7352 		rc = B_TRUE;
7353 		goto ibd_send_fail;
7354 	}
7355 
7356 	atomic_add_64(&state->id_xmt_bytes, pktsize);
7357 	atomic_inc_64(&state->id_xmt_pkt);
7358 
7359 	/*
7360 	 * Do LSO and checksum related work here.  For LSO send, adjust the
7361 	 * ud destination, the opcode and the LSO header information to the
7362 	 * work request.
7363 	 */
7364 	mac_lso_get(mp, &mss, &lsoflags);
7365 	if ((lsoflags & HW_LSO) != HW_LSO) {
7366 		node->w_swr.wr_opcode = IBT_WRC_SEND;
7367 		lsohdr_sz = 0;
7368 	} else {
7369 		if (ibd_setup_lso(node, mp, mss, ace->ac_dest) != 0) {
7370 			/*
7371 			 * The routine can only fail if there's no memory; we
7372 			 * can only drop the packet if this happens
7373 			 */
7374 			ibd_print_warn(state,
7375 			    "ibd_send: no memory, lso posting failed");
7376 			dofree = B_TRUE;
7377 			rc = B_TRUE;
7378 			goto ibd_send_fail;
7379 		}
7380 
7381 		node->w_swr.wr_opcode = IBT_WRC_SEND_LSO;
7382 		lsohdr_sz = (node->w_swr.wr.ud_lso).lso_hdr_sz;
7383 	}
7384 
7385 	mac_hcksum_get(mp, NULL, NULL, NULL, NULL, &hckflags);
7386 	if ((hckflags & HCK_FULLCKSUM) == HCK_FULLCKSUM)
7387 		node->w_swr.wr_flags |= IBT_WR_SEND_CKSUM;
7388 	else
7389 		node->w_swr.wr_flags &= ~IBT_WR_SEND_CKSUM;
7390 
7391 	/*
7392 	 * Prepare the sgl for posting; the routine can only fail if there's
7393 	 * no lso buf available for posting. If this is the case, we should
7394 	 * probably resched for lso bufs to become available and then try again.
7395 	 */
7396 	if (ibd_prepare_sgl(state, mp, node, lsohdr_sz) != 0) {
7397 		if (ibd_sched_poll(state, IBD_RSRC_LSOBUF, 1) != 0) {
7398 			dofree = B_TRUE;
7399 			rc = B_TRUE;
7400 		} else {
7401 			dofree = B_FALSE;
7402 			rc = B_FALSE;
7403 		}
7404 		goto ibd_send_fail;
7405 	}
7406 	node->swqe_im_mblk = mp;
7407 
7408 	/*
7409 	 * Queue the wqe to hardware; since we can now simply queue a
7410 	 * post instead of doing it serially, we cannot assume anything
7411 	 * about the 'node' after ibd_post_send() returns.
7412 	 */
7413 	node->swqe_next = NULL;
7414 
7415 	mutex_enter(&state->id_txpost_lock);
7416 	if (state->id_tx_busy) {
7417 		if (state->id_tx_head) {
7418 			state->id_tx_tail->swqe_next =
7419 			    SWQE_TO_WQE(node);
7420 		} else {
7421 			state->id_tx_head = node;
7422 		}
7423 		state->id_tx_tail = node;
7424 		mutex_exit(&state->id_txpost_lock);
7425 	} else {
7426 		state->id_tx_busy = 1;
7427 		mutex_exit(&state->id_txpost_lock);
7428 		ibd_post_send(state, node);
7429 	}
7430 
7431 	return (B_TRUE);
7432 
7433 ibd_send_fail:
7434 	if (node && mp)
7435 		ibd_free_lsohdr(node, mp);
7436 
7437 	if (dofree)
7438 		freemsg(mp);
7439 
7440 	if (node != NULL) {
7441 		if (rc_chan) {
7442 			ibd_rc_tx_cleanup(node);
7443 		} else {
7444 			ibd_tx_cleanup(state, node);
7445 		}
7446 	}
7447 
7448 	return (rc);
7449 }
7450 
7451 /*
7452  * GLDv3 entry point for transmitting datagram.
7453  */
7454 static mblk_t *
ibd_m_tx(void * arg,mblk_t * mp)7455 ibd_m_tx(void *arg, mblk_t *mp)
7456 {
7457 	ibd_state_t *state = (ibd_state_t *)arg;
7458 	mblk_t *next;
7459 
7460 	if (state->id_type == IBD_PORT_DRIVER) {
7461 		freemsgchain(mp);
7462 		return (NULL);
7463 	}
7464 
7465 	if ((state->id_link_state != LINK_STATE_UP) ||
7466 	    !(state->id_mac_state & IBD_DRV_STARTED)) {
7467 		freemsgchain(mp);
7468 		mp = NULL;
7469 	}
7470 
7471 	while (mp != NULL) {
7472 		next = mp->b_next;
7473 		mp->b_next = NULL;
7474 		if (ibd_send(state, mp) == B_FALSE) {
7475 			/* Send fail */
7476 			mp->b_next = next;
7477 			break;
7478 		}
7479 		mp = next;
7480 	}
7481 
7482 	return (mp);
7483 }
7484 
7485 /*
7486  * this handles Tx and Rx completions. With separate CQs, this handles
7487  * only Rx completions.
7488  */
7489 static uint_t
ibd_intr(caddr_t arg)7490 ibd_intr(caddr_t arg)
7491 {
7492 	ibd_state_t *state = (ibd_state_t *)arg;
7493 
7494 	ibd_poll_rcq(state, state->id_rcq_hdl);
7495 
7496 	return (DDI_INTR_CLAIMED);
7497 }
7498 
7499 /*
7500  * Poll and fully drain the send cq
7501  */
7502 static void
ibd_drain_scq(ibd_state_t * state,ibt_cq_hdl_t cq_hdl)7503 ibd_drain_scq(ibd_state_t *state, ibt_cq_hdl_t cq_hdl)
7504 {
7505 	ibt_wc_t *wcs = state->id_txwcs;
7506 	uint_t numwcs = state->id_txwcs_size;
7507 	ibd_wqe_t *wqe;
7508 	ibd_swqe_t *head, *tail;
7509 	ibt_wc_t *wc;
7510 	uint_t num_polled;
7511 	int i;
7512 
7513 	while (ibt_poll_cq(cq_hdl, wcs, numwcs, &num_polled) == IBT_SUCCESS) {
7514 		head = tail = NULL;
7515 		for (i = 0, wc = wcs; i < num_polled; i++, wc++) {
7516 			wqe = (ibd_wqe_t *)(uintptr_t)wc->wc_id;
7517 			if (wc->wc_status != IBT_WC_SUCCESS) {
7518 				/*
7519 				 * Channel being torn down.
7520 				 */
7521 				if (wc->wc_status == IBT_WC_WR_FLUSHED_ERR) {
7522 					DPRINT(5, "ibd_drain_scq: flush error");
7523 					DPRINT(10, "ibd_drain_scq: Bad "
7524 					    "status %d", wc->wc_status);
7525 				} else {
7526 					DPRINT(10, "ibd_drain_scq: "
7527 					    "unexpected wc_status %d",
7528 					    wc->wc_status);
7529 				}
7530 				/*
7531 				 * Fallthrough to invoke the Tx handler to
7532 				 * release held resources, e.g., AH refcount.
7533 				 */
7534 			}
7535 			/*
7536 			 * Add this swqe to the list to be cleaned up.
7537 			 */
7538 			if (head)
7539 				tail->swqe_next = wqe;
7540 			else
7541 				head = WQE_TO_SWQE(wqe);
7542 			tail = WQE_TO_SWQE(wqe);
7543 		}
7544 		tail->swqe_next = NULL;
7545 		ibd_tx_cleanup_list(state, head, tail);
7546 
7547 		/*
7548 		 * Resume any blocked transmissions if possible
7549 		 */
7550 		ibd_resume_transmission(state);
7551 	}
7552 }
7553 
7554 /*
7555  * Poll and fully drain the receive cq
7556  */
7557 static void
ibd_drain_rcq(ibd_state_t * state,ibt_cq_hdl_t cq_hdl)7558 ibd_drain_rcq(ibd_state_t *state, ibt_cq_hdl_t cq_hdl)
7559 {
7560 	ibt_wc_t *wcs = state->id_rxwcs;
7561 	uint_t numwcs = state->id_rxwcs_size;
7562 	ibd_rwqe_t *rwqe;
7563 	ibt_wc_t *wc;
7564 	uint_t num_polled;
7565 	int i;
7566 	mblk_t *head, *tail, *mp;
7567 
7568 	while (ibt_poll_cq(cq_hdl, wcs, numwcs, &num_polled) == IBT_SUCCESS) {
7569 		head = tail = NULL;
7570 		for (i = 0, wc = wcs; i < num_polled; i++, wc++) {
7571 			rwqe = (ibd_rwqe_t *)(uintptr_t)wc->wc_id;
7572 			if (wc->wc_status != IBT_WC_SUCCESS) {
7573 				/*
7574 				 * Channel being torn down.
7575 				 */
7576 				if (wc->wc_status == IBT_WC_WR_FLUSHED_ERR) {
7577 					DPRINT(5, "ibd_drain_rcq: "
7578 					    "expected flushed rwqe");
7579 				} else {
7580 					DPRINT(5, "ibd_drain_rcq: "
7581 					    "unexpected wc_status %d",
7582 					    wc->wc_status);
7583 				}
7584 				atomic_inc_32(
7585 				    &state->id_rx_list.dl_bufs_outstanding);
7586 				freemsg(rwqe->rwqe_im_mblk);
7587 				continue;
7588 			}
7589 			mp = ibd_process_rx(state, rwqe, wc);
7590 			if (mp == NULL)
7591 				continue;
7592 
7593 			/*
7594 			 * Add this mp to the list to send to the nw layer.
7595 			 */
7596 			if (head)
7597 				tail->b_next = mp;
7598 			else
7599 				head = mp;
7600 			tail = mp;
7601 		}
7602 		if (head)
7603 			mac_rx(state->id_mh, state->id_rh, head);
7604 
7605 		/*
7606 		 * Account for #rwqes polled.
7607 		 * Post more here, if less than one fourth full.
7608 		 */
7609 		if (atomic_add_32_nv(&state->id_rx_list.dl_cnt, -num_polled) <
7610 		    (state->id_ud_num_rwqe / 4))
7611 			ibd_post_recv_intr(state);
7612 	}
7613 }
7614 
7615 /*
7616  * Common code for interrupt handling as well as for polling
7617  * for all completed wqe's while detaching.
7618  */
7619 static void
ibd_poll_scq(ibd_state_t * state,ibt_cq_hdl_t cq_hdl)7620 ibd_poll_scq(ibd_state_t *state, ibt_cq_hdl_t cq_hdl)
7621 {
7622 	int flag, redo_flag;
7623 	int redo = 1;
7624 
7625 	flag = IBD_CQ_POLLING;
7626 	redo_flag = IBD_REDO_CQ_POLLING;
7627 
7628 	mutex_enter(&state->id_scq_poll_lock);
7629 	if (state->id_scq_poll_busy & flag) {
7630 		ibd_print_warn(state, "ibd_poll_scq: multiple polling threads");
7631 		state->id_scq_poll_busy |= redo_flag;
7632 		mutex_exit(&state->id_scq_poll_lock);
7633 		return;
7634 	}
7635 	state->id_scq_poll_busy |= flag;
7636 	mutex_exit(&state->id_scq_poll_lock);
7637 
7638 	/*
7639 	 * In some cases (eg detaching), this code can be invoked on
7640 	 * any cpu after disabling cq notification (thus no concurrency
7641 	 * exists). Apart from that, the following applies normally:
7642 	 * Transmit completion handling could be from any cpu if
7643 	 * Tx CQ is poll driven, but always on Tx interrupt cpu if Tx CQ
7644 	 * is interrupt driven.
7645 	 */
7646 
7647 	/*
7648 	 * Poll and drain the CQ
7649 	 */
7650 	ibd_drain_scq(state, cq_hdl);
7651 
7652 	/*
7653 	 * Enable CQ notifications and redrain the cq to catch any
7654 	 * completions we might have missed after the ibd_drain_scq()
7655 	 * above and before the ibt_enable_cq_notify() that follows.
7656 	 * Finally, service any new requests to poll the cq that
7657 	 * could've come in after the ibt_enable_cq_notify().
7658 	 */
7659 	do {
7660 		if (ibt_enable_cq_notify(cq_hdl, IBT_NEXT_COMPLETION) !=
7661 		    IBT_SUCCESS) {
7662 			DPRINT(10, "ibd_intr: ibt_enable_cq_notify() failed");
7663 		}
7664 
7665 		ibd_drain_scq(state, cq_hdl);
7666 
7667 		mutex_enter(&state->id_scq_poll_lock);
7668 		if (state->id_scq_poll_busy & redo_flag)
7669 			state->id_scq_poll_busy &= ~redo_flag;
7670 		else {
7671 			state->id_scq_poll_busy &= ~flag;
7672 			redo = 0;
7673 		}
7674 		mutex_exit(&state->id_scq_poll_lock);
7675 
7676 	} while (redo);
7677 }
7678 
7679 /*
7680  * Common code for interrupt handling as well as for polling
7681  * for all completed wqe's while detaching.
7682  */
7683 static void
ibd_poll_rcq(ibd_state_t * state,ibt_cq_hdl_t rcq)7684 ibd_poll_rcq(ibd_state_t *state, ibt_cq_hdl_t rcq)
7685 {
7686 	int flag, redo_flag;
7687 	int redo = 1;
7688 
7689 	flag = IBD_CQ_POLLING;
7690 	redo_flag = IBD_REDO_CQ_POLLING;
7691 
7692 	mutex_enter(&state->id_rcq_poll_lock);
7693 	if (state->id_rcq_poll_busy & flag) {
7694 		ibd_print_warn(state, "ibd_poll_rcq: multiple polling threads");
7695 		state->id_rcq_poll_busy |= redo_flag;
7696 		mutex_exit(&state->id_rcq_poll_lock);
7697 		return;
7698 	}
7699 	state->id_rcq_poll_busy |= flag;
7700 	mutex_exit(&state->id_rcq_poll_lock);
7701 
7702 	/*
7703 	 * Poll and drain the CQ
7704 	 */
7705 	ibd_drain_rcq(state, rcq);
7706 
7707 	/*
7708 	 * Enable CQ notifications and redrain the cq to catch any
7709 	 * completions we might have missed after the ibd_drain_cq()
7710 	 * above and before the ibt_enable_cq_notify() that follows.
7711 	 * Finally, service any new requests to poll the cq that
7712 	 * could've come in after the ibt_enable_cq_notify().
7713 	 */
7714 	do {
7715 		if (ibt_enable_cq_notify(rcq, IBT_NEXT_COMPLETION) !=
7716 		    IBT_SUCCESS) {
7717 			DPRINT(10, "ibd_intr: ibt_enable_cq_notify() failed");
7718 		}
7719 
7720 		ibd_drain_rcq(state, rcq);
7721 
7722 		mutex_enter(&state->id_rcq_poll_lock);
7723 		if (state->id_rcq_poll_busy & redo_flag)
7724 			state->id_rcq_poll_busy &= ~redo_flag;
7725 		else {
7726 			state->id_rcq_poll_busy &= ~flag;
7727 			redo = 0;
7728 		}
7729 		mutex_exit(&state->id_rcq_poll_lock);
7730 
7731 	} while (redo);
7732 }
7733 
7734 /*
7735  * Unmap the memory area associated with a given swqe.
7736  */
7737 void
ibd_unmap_mem(ibd_state_t * state,ibd_swqe_t * swqe)7738 ibd_unmap_mem(ibd_state_t *state, ibd_swqe_t *swqe)
7739 {
7740 	ibt_status_t stat;
7741 
7742 	DPRINT(20, "ibd_unmap_mem: wqe=%p, seg=%d\n", swqe, swqe->w_swr.wr_nds);
7743 
7744 	if (swqe->w_mi_hdl) {
7745 		if ((stat = ibt_unmap_mem_iov(state->id_hca_hdl,
7746 		    swqe->w_mi_hdl)) != IBT_SUCCESS) {
7747 			DPRINT(10,
7748 			    "failed in ibt_unmap_mem_iov, ret=%d\n", stat);
7749 		}
7750 		swqe->w_mi_hdl = NULL;
7751 	}
7752 	swqe->w_swr.wr_nds = 0;
7753 }
7754 
7755 void
ibd_dec_ref_ace(ibd_state_t * state,ibd_ace_t * ace)7756 ibd_dec_ref_ace(ibd_state_t *state, ibd_ace_t *ace)
7757 {
7758 	/*
7759 	 * The recycling logic can be eliminated from here
7760 	 * and put into the async thread if we create another
7761 	 * list to hold ACE's for unjoined mcg's.
7762 	 */
7763 	if (DEC_REF_DO_CYCLE(ace)) {
7764 		ibd_mce_t *mce;
7765 
7766 		/*
7767 		 * Check with the lock taken: we decremented
7768 		 * reference count without the lock, and some
7769 		 * transmitter might already have bumped the
7770 		 * reference count (possible in case of multicast
7771 		 * disable when we leave the AH on the active
7772 		 * list). If not still 0, get out, leaving the
7773 		 * recycle bit intact.
7774 		 *
7775 		 * Atomically transition the AH from active
7776 		 * to free list, and queue a work request to
7777 		 * leave the group and destroy the mce. No
7778 		 * transmitter can be looking at the AH or
7779 		 * the MCE in between, since we have the
7780 		 * ac_mutex lock. In the SendOnly reap case,
7781 		 * it is not necessary to hold the ac_mutex
7782 		 * and recheck the ref count (since the AH was
7783 		 * taken off the active list), we just do it
7784 		 * to have uniform processing with the Full
7785 		 * reap case.
7786 		 */
7787 		mutex_enter(&state->id_ac_mutex);
7788 		mce = ace->ac_mce;
7789 		if (GET_REF_CYCLE(ace) == 0) {
7790 			CLEAR_REFCYCLE(ace);
7791 			/*
7792 			 * Identify the case of fullmember reap as
7793 			 * opposed to mcg trap reap. Also, port up
7794 			 * might set ac_mce to NULL to indicate Tx
7795 			 * cleanup should do no more than put the
7796 			 * AH in the free list (see ibd_async_link).
7797 			 */
7798 			if (mce != NULL) {
7799 				ace->ac_mce = NULL;
7800 				IBD_ACACHE_PULLOUT_ACTIVE(state, ace);
7801 				/*
7802 				 * mc_req was initialized at mce
7803 				 * creation time.
7804 				 */
7805 				ibd_queue_work_slot(state,
7806 				    &mce->mc_req, IBD_ASYNC_REAP);
7807 			}
7808 			IBD_ACACHE_INSERT_FREE(state, ace);
7809 		}
7810 		mutex_exit(&state->id_ac_mutex);
7811 	}
7812 }
7813 
7814 /*
7815  * Common code that deals with clean ups after a successful or
7816  * erroneous transmission attempt.
7817  */
7818 static void
ibd_tx_cleanup(ibd_state_t * state,ibd_swqe_t * swqe)7819 ibd_tx_cleanup(ibd_state_t *state, ibd_swqe_t *swqe)
7820 {
7821 	ibd_ace_t *ace = swqe->w_ahandle;
7822 
7823 	DPRINT(20, "ibd_tx_cleanup %p\n", swqe);
7824 
7825 	/*
7826 	 * If this was a dynamic mapping in ibd_send(), we need to
7827 	 * unmap here. If this was an lso buffer we'd used for sending,
7828 	 * we need to release the lso buf to the pool, since the resource
7829 	 * is scarce. However, if this was simply a normal send using
7830 	 * the copybuf (present in each swqe), we don't need to release it.
7831 	 */
7832 	if (swqe->swqe_im_mblk != NULL) {
7833 		if (swqe->w_buftype == IBD_WQE_MAPPED) {
7834 			ibd_unmap_mem(state, swqe);
7835 		} else if (swqe->w_buftype == IBD_WQE_LSOBUF) {
7836 			ibd_release_lsobufs(state,
7837 			    swqe->w_swr.wr_sgl, swqe->w_swr.wr_nds);
7838 		}
7839 		ibd_free_lsohdr(swqe, swqe->swqe_im_mblk);
7840 		freemsg(swqe->swqe_im_mblk);
7841 		swqe->swqe_im_mblk = NULL;
7842 	}
7843 
7844 	/*
7845 	 * Drop the reference count on the AH; it can be reused
7846 	 * now for a different destination if there are no more
7847 	 * posted sends that will use it. This can be eliminated
7848 	 * if we can always associate each Tx buffer with an AH.
7849 	 * The ace can be null if we are cleaning up from the
7850 	 * ibd_send() error path.
7851 	 */
7852 	if (ace != NULL) {
7853 		ibd_dec_ref_ace(state, ace);
7854 	}
7855 
7856 	/*
7857 	 * Release the send wqe for reuse.
7858 	 */
7859 	swqe->swqe_next = NULL;
7860 	ibd_release_swqe(state, swqe, swqe, 1);
7861 }
7862 
7863 static void
ibd_tx_cleanup_list(ibd_state_t * state,ibd_swqe_t * head,ibd_swqe_t * tail)7864 ibd_tx_cleanup_list(ibd_state_t *state, ibd_swqe_t *head, ibd_swqe_t *tail)
7865 {
7866 	ibd_ace_t *ace;
7867 	ibd_swqe_t *swqe;
7868 	int n = 0;
7869 
7870 	DPRINT(20, "ibd_tx_cleanup_list %p %p\n", head, tail);
7871 
7872 	for (swqe = head; swqe != NULL; swqe = WQE_TO_SWQE(swqe->swqe_next)) {
7873 
7874 		/*
7875 		 * If this was a dynamic mapping in ibd_send(), we need to
7876 		 * unmap here. If this was an lso buffer we'd used for sending,
7877 		 * we need to release the lso buf to the pool, since the
7878 		 * resource is scarce. However, if this was simply a normal
7879 		 * send using the copybuf (present in each swqe), we don't need
7880 		 * to release it.
7881 		 */
7882 		if (swqe->swqe_im_mblk != NULL) {
7883 			if (swqe->w_buftype == IBD_WQE_MAPPED) {
7884 				ibd_unmap_mem(state, swqe);
7885 			} else if (swqe->w_buftype == IBD_WQE_LSOBUF) {
7886 				ibd_release_lsobufs(state,
7887 				    swqe->w_swr.wr_sgl, swqe->w_swr.wr_nds);
7888 			}
7889 			ibd_free_lsohdr(swqe, swqe->swqe_im_mblk);
7890 			freemsg(swqe->swqe_im_mblk);
7891 			swqe->swqe_im_mblk = NULL;
7892 		}
7893 
7894 		/*
7895 		 * Drop the reference count on the AH; it can be reused
7896 		 * now for a different destination if there are no more
7897 		 * posted sends that will use it. This can be eliminated
7898 		 * if we can always associate each Tx buffer with an AH.
7899 		 * The ace can be null if we are cleaning up from the
7900 		 * ibd_send() error path.
7901 		 */
7902 		ace = swqe->w_ahandle;
7903 		if (ace != NULL) {
7904 			ibd_dec_ref_ace(state, ace);
7905 		}
7906 		n++;
7907 	}
7908 
7909 	/*
7910 	 * Release the send wqes for reuse.
7911 	 */
7912 	ibd_release_swqe(state, head, tail, n);
7913 }
7914 
7915 /*
7916  * Processing to be done after receipt of a packet; hand off to GLD
7917  * in the format expected by GLD.  The received packet has this
7918  * format: 2b sap :: 00 :: data.
7919  */
7920 static mblk_t *
ibd_process_rx(ibd_state_t * state,ibd_rwqe_t * rwqe,ibt_wc_t * wc)7921 ibd_process_rx(ibd_state_t *state, ibd_rwqe_t *rwqe, ibt_wc_t *wc)
7922 {
7923 	ib_header_info_t *phdr;
7924 	mblk_t *mp;
7925 	ipoib_hdr_t *ipibp;
7926 	ipha_t *iphap;
7927 	ip6_t *ip6h;
7928 	int len;
7929 	ib_msglen_t pkt_len = wc->wc_bytes_xfer;
7930 	uint32_t bufs;
7931 
7932 	/*
7933 	 * Track number handed to upper layer that need to be returned.
7934 	 */
7935 	bufs = atomic_inc_32_nv(&state->id_rx_list.dl_bufs_outstanding);
7936 
7937 	/* Never run out of rwqes, use allocb when running low */
7938 	if (bufs >= state->id_rx_bufs_outstanding_limit) {
7939 		atomic_dec_32(&state->id_rx_list.dl_bufs_outstanding);
7940 		atomic_inc_32(&state->id_rx_allocb);
7941 		mp = allocb(pkt_len, BPRI_HI);
7942 		if (mp) {
7943 			bcopy(rwqe->rwqe_im_mblk->b_rptr, mp->b_rptr, pkt_len);
7944 			ibd_post_recv(state, rwqe);
7945 		} else {	/* no memory */
7946 			atomic_inc_32(&state->id_rx_allocb_failed);
7947 			ibd_post_recv(state, rwqe);
7948 			return (NULL);
7949 		}
7950 	} else {
7951 		mp = rwqe->rwqe_im_mblk;
7952 	}
7953 
7954 
7955 	/*
7956 	 * Adjust write pointer depending on how much data came in.
7957 	 */
7958 	mp->b_wptr = mp->b_rptr + pkt_len;
7959 
7960 	/*
7961 	 * Make sure this is NULL or we're in trouble.
7962 	 */
7963 	if (mp->b_next != NULL) {
7964 		ibd_print_warn(state,
7965 		    "ibd_process_rx: got duplicate mp from rcq?");
7966 		mp->b_next = NULL;
7967 	}
7968 
7969 	/*
7970 	 * the IB link will deliver one of the IB link layer
7971 	 * headers called, the Global Routing Header (GRH).
7972 	 * ibd driver uses the information in GRH to build the
7973 	 * Header_info structure and pass it with the datagram up
7974 	 * to GLDv3.
7975 	 * If the GRH is not valid, indicate to GLDv3 by setting
7976 	 * the VerTcFlow field to 0.
7977 	 */
7978 	phdr = (ib_header_info_t *)mp->b_rptr;
7979 	if (wc->wc_flags & IBT_WC_GRH_PRESENT) {
7980 		phdr->ib_grh.ipoib_sqpn = htonl(wc->wc_qpn);
7981 
7982 		/* if it is loop back packet, just drop it. */
7983 		if (state->id_enable_rc) {
7984 			if (bcmp(&phdr->ib_grh.ipoib_sqpn,
7985 			    &state->rc_macaddr_loopback,
7986 			    IPOIB_ADDRL) == 0) {
7987 				freemsg(mp);
7988 				return (NULL);
7989 			}
7990 		} else {
7991 			if (bcmp(&phdr->ib_grh.ipoib_sqpn, &state->id_macaddr,
7992 			    IPOIB_ADDRL) == 0) {
7993 				freemsg(mp);
7994 				return (NULL);
7995 			}
7996 		}
7997 
7998 		ovbcopy(&phdr->ib_grh.ipoib_sqpn, &phdr->ib_src,
7999 		    sizeof (ipoib_mac_t));
8000 		if (*(uint8_t *)(phdr->ib_grh.ipoib_dgid_pref) == 0xFF) {
8001 			phdr->ib_dst.ipoib_qpn = htonl(IB_MC_QPN);
8002 			IBD_CLEAR_SCOPE_PKEY(&phdr->ib_dst);
8003 		} else {
8004 			phdr->ib_dst.ipoib_qpn = state->id_macaddr.ipoib_qpn;
8005 		}
8006 	} else {
8007 		/*
8008 		 * It can not be a IBA multicast packet. Must have been
8009 		 * unicast for us. Just copy the interface address to dst.
8010 		 */
8011 		phdr->ib_grh.ipoib_vertcflow = 0;
8012 		ovbcopy(&state->id_macaddr, &phdr->ib_dst,
8013 		    sizeof (ipoib_mac_t));
8014 	}
8015 
8016 	/*
8017 	 * For ND6 packets, padding is at the front of the source/target
8018 	 * lladdr. However the inet6 layer is not aware of it, hence remove
8019 	 * the padding from such packets.
8020 	 */
8021 	ipibp = (ipoib_hdr_t *)((uchar_t *)mp->b_rptr + sizeof (ipoib_pgrh_t));
8022 	if (ntohs(ipibp->ipoib_type) == ETHERTYPE_IPV6) {
8023 		ip6h = (ip6_t *)((uchar_t *)ipibp + sizeof (ipoib_hdr_t));
8024 		len = ntohs(ip6h->ip6_plen);
8025 		if (ip6h->ip6_nxt == IPPROTO_ICMPV6) {
8026 			/* LINTED: E_CONSTANT_CONDITION */
8027 			IBD_PAD_NSNA(ip6h, len, IBD_RECV);
8028 		}
8029 	}
8030 
8031 	/*
8032 	 * Update statistics
8033 	 */
8034 	atomic_add_64(&state->id_rcv_bytes, pkt_len);
8035 	atomic_inc_64(&state->id_rcv_pkt);
8036 	if (bcmp(&phdr->ib_dst, &state->id_bcaddr, IPOIB_ADDRL) == 0)
8037 		atomic_inc_64(&state->id_brd_rcv);
8038 	else if ((ntohl(phdr->ib_dst.ipoib_qpn) & IB_QPN_MASK) == IB_MC_QPN)
8039 		atomic_inc_64(&state->id_multi_rcv);
8040 
8041 	iphap = (ipha_t *)((uchar_t *)ipibp + sizeof (ipoib_hdr_t));
8042 	/*
8043 	 * Set receive checksum status in mp
8044 	 * Hardware checksumming can be considered valid only if:
8045 	 * 1. CQE.IP_OK bit is set
8046 	 * 2. CQE.CKSUM = 0xffff
8047 	 * 3. IPv6 routing header is not present in the packet
8048 	 * 4. If there are no IP_OPTIONS in the IP HEADER
8049 	 */
8050 
8051 	if (((wc->wc_flags & IBT_WC_CKSUM_OK) == IBT_WC_CKSUM_OK) &&
8052 	    (wc->wc_cksum == 0xFFFF) &&
8053 	    (iphap->ipha_version_and_hdr_length == IP_SIMPLE_HDR_VERSION)) {
8054 		mac_hcksum_set(mp, 0, 0, 0, 0, HCK_FULLCKSUM_OK);
8055 	}
8056 
8057 	return (mp);
8058 }
8059 
8060 /*
8061  * Callback code invoked from STREAMs when the receive data buffer is
8062  * free for recycling.
8063  */
8064 static void
ibd_freemsg_cb(char * arg)8065 ibd_freemsg_cb(char *arg)
8066 {
8067 	ibd_rwqe_t *rwqe = (ibd_rwqe_t *)arg;
8068 	ibd_state_t *state = rwqe->w_state;
8069 
8070 	atomic_dec_32(&state->id_rx_list.dl_bufs_outstanding);
8071 
8072 	/*
8073 	 * If the driver is stopped, just free the rwqe.
8074 	 */
8075 	if (atomic_add_32_nv(&state->id_running, 0) == 0) {
8076 		DPRINT(6, "ibd_freemsg: wqe being freed");
8077 		rwqe->rwqe_im_mblk = NULL;
8078 		ibd_free_rwqe(state, rwqe);
8079 		return;
8080 	}
8081 
8082 	rwqe->rwqe_im_mblk = desballoc(rwqe->rwqe_copybuf.ic_bufaddr,
8083 	    state->id_mtu + IPOIB_GRH_SIZE, 0, &rwqe->w_freemsg_cb);
8084 	if (rwqe->rwqe_im_mblk == NULL) {
8085 		ibd_free_rwqe(state, rwqe);
8086 		DPRINT(6, "ibd_freemsg: desballoc failed");
8087 		return;
8088 	}
8089 
8090 	ibd_post_recv(state, rwqe);
8091 }
8092 
8093 static uint_t
ibd_tx_recycle(caddr_t arg)8094 ibd_tx_recycle(caddr_t arg)
8095 {
8096 	ibd_state_t *state = (ibd_state_t *)arg;
8097 
8098 	/*
8099 	 * Poll for completed entries
8100 	 */
8101 	ibd_poll_scq(state, state->id_scq_hdl);
8102 
8103 	return (DDI_INTR_CLAIMED);
8104 }
8105 
8106 #ifdef IBD_LOGGING
8107 static void
ibd_log_init(void)8108 ibd_log_init(void)
8109 {
8110 	ibd_lbuf = kmem_zalloc(IBD_LOG_SZ, KM_SLEEP);
8111 	ibd_lbuf_ndx = 0;
8112 
8113 	mutex_init(&ibd_lbuf_lock, NULL, MUTEX_DRIVER, NULL);
8114 }
8115 
8116 static void
ibd_log_fini(void)8117 ibd_log_fini(void)
8118 {
8119 	if (ibd_lbuf)
8120 		kmem_free(ibd_lbuf, IBD_LOG_SZ);
8121 	ibd_lbuf_ndx = 0;
8122 	ibd_lbuf = NULL;
8123 
8124 	mutex_destroy(&ibd_lbuf_lock);
8125 }
8126 
8127 static void
ibd_log(const char * fmt,...)8128 ibd_log(const char *fmt, ...)
8129 {
8130 	va_list	ap;
8131 	uint32_t off;
8132 	uint32_t msglen;
8133 	char tmpbuf[IBD_DMAX_LINE];
8134 
8135 	if (ibd_lbuf == NULL)
8136 		return;
8137 
8138 	va_start(ap, fmt);
8139 	msglen = vsnprintf(tmpbuf, IBD_DMAX_LINE, fmt, ap);
8140 	va_end(ap);
8141 
8142 	if (msglen >= IBD_DMAX_LINE)
8143 		msglen = IBD_DMAX_LINE - 1;
8144 
8145 	mutex_enter(&ibd_lbuf_lock);
8146 
8147 	off = ibd_lbuf_ndx;		/* current msg should go here */
8148 	if ((ibd_lbuf_ndx) && (ibd_lbuf[ibd_lbuf_ndx-1] != '\n'))
8149 		ibd_lbuf[ibd_lbuf_ndx-1] = '\n';
8150 
8151 	ibd_lbuf_ndx += msglen;		/* place where next msg should start */
8152 	ibd_lbuf[ibd_lbuf_ndx] = 0;	/* current msg should terminate */
8153 
8154 	if (ibd_lbuf_ndx >= (IBD_LOG_SZ - 2 * IBD_DMAX_LINE))
8155 		ibd_lbuf_ndx = 0;
8156 
8157 	mutex_exit(&ibd_lbuf_lock);
8158 
8159 	bcopy(tmpbuf, ibd_lbuf+off, msglen);	/* no lock needed for this */
8160 }
8161 #endif
8162 
8163 /* ARGSUSED */
8164 static int
ibd_create_partition(void * karg,intptr_t arg,int mode,cred_t * credp,int * rvalp)8165 ibd_create_partition(void *karg, intptr_t arg, int mode, cred_t *credp,
8166     int *rvalp)
8167 {
8168 	ibd_create_ioctl_t	*cmd = karg;
8169 	ibd_state_t		*state, *port_state, *p;
8170 	int			i, err, rval = 0;
8171 	mac_register_t		*macp;
8172 	ibt_hca_portinfo_t	*pinfop = NULL;
8173 	ibt_status_t		ibt_status;
8174 	uint_t			psize, pinfosz;
8175 	boolean_t		force_create = B_FALSE;
8176 
8177 	cmd->ibdioc.ioc_status = 0;
8178 
8179 	if (cmd->ibdioc.ioc_port_inst < 0) {
8180 		cmd->ibdioc.ioc_status = IBD_INVALID_PORT_INST;
8181 		return (EINVAL);
8182 	}
8183 	port_state = ddi_get_soft_state(ibd_list, cmd->ibdioc.ioc_port_inst);
8184 	if (port_state == NULL) {
8185 		DPRINT(10, "ibd_create_partition: failed to get state %d",
8186 		    cmd->ibdioc.ioc_port_inst);
8187 		cmd->ibdioc.ioc_status = IBD_INVALID_PORT_INST;
8188 		return (EINVAL);
8189 	}
8190 
8191 	/* Limited PKeys not supported */
8192 	if (cmd->ioc_pkey <= IB_PKEY_INVALID_FULL) {
8193 		rval = EINVAL;
8194 		goto part_create_return;
8195 	}
8196 
8197 	if (cmd->ioc_force_create == 0) {
8198 		/*
8199 		 * Check if the port pkey table contains the pkey for which
8200 		 * this partition is being created.
8201 		 */
8202 		ibt_status = ibt_query_hca_ports(port_state->id_hca_hdl,
8203 		    port_state->id_port, &pinfop, &psize, &pinfosz);
8204 
8205 		if ((ibt_status != IBT_SUCCESS) || (psize != 1)) {
8206 			rval = EINVAL;
8207 			goto part_create_return;
8208 		}
8209 
8210 		if (pinfop->p_linkstate != IBT_PORT_ACTIVE) {
8211 			rval = ENETDOWN;
8212 			cmd->ibdioc.ioc_status = IBD_PORT_IS_DOWN;
8213 			goto part_create_return;
8214 		}
8215 
8216 		for (i = 0; i < pinfop->p_pkey_tbl_sz; i++) {
8217 			if (pinfop->p_pkey_tbl[i] == cmd->ioc_pkey) {
8218 				break;
8219 			}
8220 		}
8221 		if (i == pinfop->p_pkey_tbl_sz) {
8222 			rval = EINVAL;
8223 			cmd->ibdioc.ioc_status = IBD_PKEY_NOT_PRESENT;
8224 			goto part_create_return;
8225 		}
8226 	} else {
8227 		force_create = B_TRUE;
8228 	}
8229 
8230 	mutex_enter(&ibd_objlist_lock);
8231 	for (p = ibd_objlist_head; p; p = p->id_next) {
8232 		if ((p->id_port_inst == cmd->ibdioc.ioc_port_inst) &&
8233 		    (p->id_pkey == cmd->ioc_pkey) &&
8234 		    (p->id_plinkid == cmd->ioc_partid)) {
8235 			mutex_exit(&ibd_objlist_lock);
8236 			rval = EEXIST;
8237 			cmd->ibdioc.ioc_status = IBD_PARTITION_EXISTS;
8238 			goto part_create_return;
8239 		}
8240 	}
8241 	mutex_exit(&ibd_objlist_lock);
8242 
8243 	state = kmem_zalloc(sizeof (ibd_state_t), KM_SLEEP);
8244 
8245 	state->id_type		= IBD_PARTITION_OBJ;
8246 
8247 	state->id_plinkid	= cmd->ioc_partid;
8248 	state->id_dlinkid	= cmd->ibdioc.ioc_linkid;
8249 	state->id_port_inst	= cmd->ibdioc.ioc_port_inst;
8250 
8251 	state->id_dip		= port_state->id_dip;
8252 	state->id_port		= port_state->id_port;
8253 	state->id_pkey		= cmd->ioc_pkey;
8254 	state->id_hca_guid	= port_state->id_hca_guid;
8255 	state->id_port_guid	= port_state->id_port_guid;
8256 	state->id_force_create	= force_create;
8257 
8258 	mutex_init(&state->id_macst_lock, NULL, MUTEX_DRIVER, NULL);
8259 	cv_init(&state->id_macst_cv, NULL, CV_DEFAULT, NULL);
8260 
8261 	if (ibd_part_attach(state, state->id_dip) != DDI_SUCCESS) {
8262 		rval = EIO;
8263 		cmd->ibdioc.ioc_status = IBD_NO_HW_RESOURCE;
8264 		goto fail;
8265 	}
8266 
8267 	if ((macp = mac_alloc(MAC_VERSION)) == NULL) {
8268 		rval = EAGAIN;
8269 		goto fail;
8270 	}
8271 
8272 	macp->m_type_ident	= MAC_PLUGIN_IDENT_IB;
8273 	macp->m_dip		= port_state->id_dip;
8274 	macp->m_instance	= (uint_t)-1;
8275 	macp->m_driver		= state;
8276 	macp->m_src_addr	= (uint8_t *)&state->id_macaddr;
8277 	macp->m_callbacks	= &ibd_m_callbacks;
8278 	macp->m_min_sdu		= 0;
8279 	macp->m_multicast_sdu	= IBD_DEF_MAX_SDU;
8280 	if (state->id_enable_rc) {
8281 		macp->m_max_sdu		= IBD_DEF_RC_MAX_SDU;
8282 	} else {
8283 		macp->m_max_sdu		= IBD_DEF_MAX_SDU;
8284 	}
8285 	macp->m_priv_props = ibd_priv_props;
8286 
8287 	err = mac_register(macp, &state->id_mh);
8288 	mac_free(macp);
8289 
8290 	if (err != 0) {
8291 		DPRINT(10, "ibd_create_partition: mac_register() failed %d",
8292 		    err);
8293 		rval = err;
8294 		goto fail;
8295 	}
8296 
8297 	err = dls_devnet_create(state->id_mh,
8298 	    cmd->ioc_partid, crgetzoneid(credp));
8299 	if (err != 0) {
8300 		DPRINT(10, "ibd_create_partition: dls_devnet_create() failed "
8301 		    "%d", err);
8302 		rval = err;
8303 		(void) mac_unregister(state->id_mh);
8304 		goto fail;
8305 	}
8306 
8307 	/*
8308 	 * Add the new partition state structure to the list
8309 	 */
8310 	mutex_enter(&ibd_objlist_lock);
8311 	if (ibd_objlist_head)
8312 		state->id_next = ibd_objlist_head;
8313 
8314 	ibd_objlist_head = state;
8315 	mutex_exit(&ibd_objlist_lock);
8316 
8317 part_create_return:
8318 	if (pinfop) {
8319 		ibt_free_portinfo(pinfop, pinfosz);
8320 	}
8321 	return (rval);
8322 
8323 fail:
8324 	if (pinfop) {
8325 		ibt_free_portinfo(pinfop, pinfosz);
8326 	}
8327 	ibd_part_unattach(state);
8328 	kmem_free(state, sizeof (ibd_state_t));
8329 	return (rval);
8330 }
8331 
8332 /* ARGSUSED */
8333 static int
ibd_delete_partition(void * karg,intptr_t arg,int mode,cred_t * credp,int * rvalp)8334 ibd_delete_partition(void *karg, intptr_t arg, int mode, cred_t *credp,
8335     int *rvalp)
8336 {
8337 	int err;
8338 	datalink_id_t tmpid;
8339 	ibd_state_t *node, *prev;
8340 	ibd_delete_ioctl_t *cmd = karg;
8341 
8342 	prev = NULL;
8343 
8344 	mutex_enter(&ibd_objlist_lock);
8345 	node = ibd_objlist_head;
8346 
8347 	/* Find the ibd state structure corresponding to the partition */
8348 	while (node != NULL) {
8349 		if (node->id_plinkid == cmd->ioc_partid)
8350 			break;
8351 		prev = node;
8352 		node = node->id_next;
8353 	}
8354 
8355 	if (node == NULL) {
8356 		mutex_exit(&ibd_objlist_lock);
8357 		return (ENOENT);
8358 	}
8359 
8360 	if ((err = dls_devnet_destroy(node->id_mh, &tmpid, B_TRUE)) != 0) {
8361 		DPRINT(10, "ibd_delete_partition: dls_devnet_destroy() failed "
8362 		    "%d", err);
8363 		mutex_exit(&ibd_objlist_lock);
8364 		return (err);
8365 	}
8366 
8367 	/*
8368 	 * Call ibd_part_unattach() only after making sure that the instance has
8369 	 * not been started yet and is also not in late hca init mode.
8370 	 */
8371 	ibd_set_mac_progress(node, IBD_DRV_DELETE_IN_PROGRESS);
8372 
8373 	err = 0;
8374 	if ((node->id_mac_state & IBD_DRV_STARTED) ||
8375 	    (node->id_mac_state & IBD_DRV_IN_LATE_HCA_INIT) ||
8376 	    (ibd_part_busy(node) != DDI_SUCCESS) ||
8377 	    ((err = mac_disable(node->id_mh)) != 0)) {
8378 		(void) dls_devnet_create(node->id_mh, cmd->ioc_partid,
8379 		    crgetzoneid(credp));
8380 		ibd_clr_mac_progress(node, IBD_DRV_DELETE_IN_PROGRESS);
8381 		mutex_exit(&ibd_objlist_lock);
8382 		return (err != 0 ? err : EBUSY);
8383 	}
8384 
8385 	node->id_mac_state |= IBD_DRV_IN_DELETION;
8386 
8387 	ibd_part_unattach(node);
8388 
8389 	ibd_clr_mac_progress(node, IBD_DRV_DELETE_IN_PROGRESS);
8390 
8391 	/* Remove the partition state structure from the linked list */
8392 	if (prev == NULL)
8393 		ibd_objlist_head = node->id_next;
8394 	else
8395 		prev->id_next = node->id_next;
8396 	mutex_exit(&ibd_objlist_lock);
8397 
8398 	if ((err = mac_unregister(node->id_mh)) != 0) {
8399 		DPRINT(10, "ibd_delete_partition: mac_unregister() failed %d",
8400 		    err);
8401 	}
8402 
8403 	cv_destroy(&node->id_macst_cv);
8404 	mutex_destroy(&node->id_macst_lock);
8405 
8406 	kmem_free(node, sizeof (ibd_state_t));
8407 
8408 	return (0);
8409 }
8410 
8411 /* ARGSUSED */
8412 static int
ibd_get_partition_info(void * karg,intptr_t arg,int mode,cred_t * cred,int * rvalp)8413 ibd_get_partition_info(void *karg, intptr_t arg, int mode, cred_t *cred,
8414     int *rvalp)
8415 {
8416 	ibd_ioctl_t		cmd;
8417 	ibpart_ioctl_t		partioc;
8418 	ibport_ioctl_t		portioc;
8419 #ifdef _MULTI_DATAMODEL
8420 	ibport_ioctl32_t	portioc32;
8421 #endif
8422 	ibd_state_t		*state, *port_state;
8423 	int			size;
8424 	ibt_hca_portinfo_t	*pinfop = NULL;
8425 	ibt_status_t		ibt_status;
8426 	uint_t			psize, pinfosz;
8427 	int			rval = 0;
8428 
8429 	size = sizeof (ibd_ioctl_t);
8430 	if (ddi_copyin((void *)arg, &cmd, size, mode)) {
8431 		return (EFAULT);
8432 	}
8433 	cmd.ioc_status = 0;
8434 	switch (cmd.ioc_info_cmd) {
8435 	case IBD_INFO_CMD_IBPART:
8436 		size = sizeof (ibpart_ioctl_t);
8437 		if (ddi_copyin((void *)arg, &partioc, size, mode)) {
8438 			return (EFAULT);
8439 		}
8440 
8441 		mutex_enter(&ibd_objlist_lock);
8442 		/* Find the ibd state structure corresponding the partition */
8443 		for (state = ibd_objlist_head; state; state = state->id_next) {
8444 			if (state->id_plinkid == cmd.ioc_linkid) {
8445 				break;
8446 			}
8447 		}
8448 
8449 		if (state == NULL) {
8450 			mutex_exit(&ibd_objlist_lock);
8451 			return (ENOENT);
8452 		}
8453 
8454 		partioc.ibdioc.ioc_linkid = state->id_dlinkid;
8455 		partioc.ibdioc.ioc_port_inst = state->id_port_inst;
8456 		partioc.ibdioc.ioc_portnum = state->id_port;
8457 		partioc.ibdioc.ioc_hcaguid = state->id_hca_guid;
8458 		partioc.ibdioc.ioc_portguid = state->id_port_guid;
8459 		partioc.ibdioc.ioc_status = 0;
8460 		partioc.ioc_partid = state->id_plinkid;
8461 		partioc.ioc_pkey = state->id_pkey;
8462 		partioc.ioc_force_create = state->id_force_create;
8463 		if (ddi_copyout((void *)&partioc, (void *)arg, size, mode)) {
8464 			mutex_exit(&ibd_objlist_lock);
8465 			return (EFAULT);
8466 		}
8467 		mutex_exit(&ibd_objlist_lock);
8468 
8469 		break;
8470 
8471 	case IBD_INFO_CMD_IBPORT:
8472 		if ((cmd.ioc_port_inst < 0) || ((port_state =
8473 		    ddi_get_soft_state(ibd_list, cmd.ioc_port_inst)) == NULL)) {
8474 			DPRINT(10, "ibd_create_partition: failed to get"
8475 			    " state %d", cmd.ioc_port_inst);
8476 			size = sizeof (ibd_ioctl_t);
8477 			cmd.ioc_status = IBD_INVALID_PORT_INST;
8478 			if (ddi_copyout((void *)&cmd, (void *)arg, size,
8479 			    mode)) {
8480 				return (EFAULT);
8481 			}
8482 			return (EINVAL);
8483 		}
8484 		ibt_status = ibt_query_hca_ports(port_state->id_hca_hdl,
8485 		    port_state->id_port, &pinfop, &psize, &pinfosz);
8486 		if ((ibt_status != IBT_SUCCESS) || (psize != 1)) {
8487 			return (EINVAL);
8488 		}
8489 #ifdef _MULTI_DATAMODEL
8490 		switch (ddi_model_convert_from(mode & FMODELS)) {
8491 		case DDI_MODEL_ILP32: {
8492 			size = sizeof (ibport_ioctl32_t);
8493 			if (ddi_copyin((void *)arg, &portioc32, size, mode)) {
8494 				rval = EFAULT;
8495 				goto fail;
8496 			}
8497 			portioc32.ibdioc.ioc_status = 0;
8498 			portioc32.ibdioc.ioc_portnum = port_state->id_port;
8499 			portioc32.ibdioc.ioc_hcaguid =
8500 			    port_state->id_hca_guid;
8501 			portioc32.ibdioc.ioc_portguid =
8502 			    port_state->id_port_guid;
8503 			if (portioc32.ioc_pkey_tbl_sz !=
8504 			    pinfop->p_pkey_tbl_sz) {
8505 				rval = EINVAL;
8506 				size = sizeof (ibd_ioctl_t);
8507 				portioc32.ibdioc.ioc_status =
8508 				    IBD_INVALID_PKEY_TBL_SIZE;
8509 				if (ddi_copyout((void *)&portioc32.ibdioc,
8510 				    (void *)arg, size, mode)) {
8511 					rval = EFAULT;
8512 					goto fail;
8513 				}
8514 				goto fail;
8515 			}
8516 			size = pinfop->p_pkey_tbl_sz * sizeof (ib_pkey_t);
8517 			if (ddi_copyout((void *)pinfop->p_pkey_tbl,
8518 			    (void *)(uintptr_t)portioc32.ioc_pkeys, size,
8519 			    mode)) {
8520 				rval = EFAULT;
8521 				goto fail;
8522 			}
8523 			size = sizeof (ibport_ioctl32_t);
8524 			if (ddi_copyout((void *)&portioc32, (void *)arg, size,
8525 			    mode)) {
8526 				rval = EFAULT;
8527 				goto fail;
8528 			}
8529 			break;
8530 		}
8531 		case DDI_MODEL_NONE:
8532 			size = sizeof (ibport_ioctl_t);
8533 			if (ddi_copyin((void *)arg, &portioc, size, mode)) {
8534 				rval = EFAULT;
8535 				goto fail;
8536 			}
8537 			portioc.ibdioc.ioc_status = 0;
8538 			portioc.ibdioc.ioc_portnum = port_state->id_port;
8539 			portioc.ibdioc.ioc_hcaguid = port_state->id_hca_guid;
8540 			portioc.ibdioc.ioc_portguid = port_state->id_port_guid;
8541 			if (portioc.ioc_pkey_tbl_sz != pinfop->p_pkey_tbl_sz) {
8542 				rval = EINVAL;
8543 				size = sizeof (ibd_ioctl_t);
8544 				portioc.ibdioc.ioc_status =
8545 				    IBD_INVALID_PKEY_TBL_SIZE;
8546 				if (ddi_copyout((void *)&portioc.ibdioc,
8547 				    (void *)arg, size, mode)) {
8548 					rval = EFAULT;
8549 					goto fail;
8550 				}
8551 				goto fail;
8552 			}
8553 			size = pinfop->p_pkey_tbl_sz * sizeof (ib_pkey_t);
8554 			if (ddi_copyout((void *)pinfop->p_pkey_tbl,
8555 			    (void *)(portioc.ioc_pkeys), size, mode)) {
8556 				rval = EFAULT;
8557 				goto fail;
8558 			}
8559 			size = sizeof (ibport_ioctl_t);
8560 			if (ddi_copyout((void *)&portioc, (void *)arg, size,
8561 			    mode)) {
8562 				rval = EFAULT;
8563 				goto fail;
8564 			}
8565 			break;
8566 		}
8567 #else /* ! _MULTI_DATAMODEL */
8568 		size = sizeof (ibport_ioctl_t);
8569 		if (ddi_copyin((void *)arg, &portioc, size, mode)) {
8570 			rval = EFAULT;
8571 			goto fail;
8572 		}
8573 		portioc.ibdioc.ioc_status = 0;
8574 		portioc.ibdioc.ioc_portnum = port_state->id_port;
8575 		portioc.ibdioc.ioc_hcaguid = port_state->id_hca_guid;
8576 		portioc.ibdioc.ioc_portguid = port_state->id_port_guid;
8577 		if (portioc.ioc_pkey_tbl_sz != pinfop->p_pkey_tbl_sz) {
8578 			rval = EINVAL;
8579 			size = sizeof (ibd_ioctl_t);
8580 			portioc.ibdioc.ioc_status = IBD_INVALID_PKEY_TBL_SIZE;
8581 			if (ddi_copyout((void *)&portioc.ibdioc, (void *)arg,
8582 			    size, mode)) {
8583 				rval = EFAULT;
8584 				goto fail;
8585 			}
8586 			goto fail;
8587 		}
8588 		size = pinfop->p_pkey_tbl_sz * sizeof (ib_pkey_t);
8589 		if (ddi_copyout((void *)pinfop->p_pkey_tbl,
8590 		    (void *)(portioc.ioc_pkeys), size, mode)) {
8591 			rval = EFAULT;
8592 			goto fail;
8593 		}
8594 		size = sizeof (ibport_ioctl_t);
8595 		if (ddi_copyout((void *)&portioc, (void *)arg, size,
8596 		    mode)) {
8597 			rval = EFAULT;
8598 			goto fail;
8599 		}
8600 #endif /* _MULTI_DATAMODEL */
8601 
8602 		break;
8603 
8604 	case IBD_INFO_CMD_PKEYTBLSZ:
8605 		if ((cmd.ioc_port_inst < 0) || ((port_state =
8606 		    ddi_get_soft_state(ibd_list, cmd.ioc_port_inst)) == NULL)) {
8607 			DPRINT(10, "ibd_create_partition: failed to get"
8608 			    " state %d", cmd.ioc_port_inst);
8609 			size = sizeof (ibd_ioctl_t);
8610 			cmd.ioc_status = IBD_INVALID_PORT_INST;
8611 			if (ddi_copyout((void *)&cmd, (void *)arg, size,
8612 			    mode)) {
8613 				return (EFAULT);
8614 			}
8615 			return (EINVAL);
8616 		}
8617 		ibt_status = ibt_query_hca_ports(port_state->id_hca_hdl,
8618 		    port_state->id_port, &pinfop, &psize, &pinfosz);
8619 		if ((ibt_status != IBT_SUCCESS) || (psize != 1)) {
8620 			return (EINVAL);
8621 		}
8622 #ifdef _MULTI_DATAMODEL
8623 		switch (ddi_model_convert_from(mode & FMODELS)) {
8624 		case DDI_MODEL_ILP32: {
8625 			size = sizeof (ibport_ioctl32_t);
8626 			if (ddi_copyin((void *)arg, &portioc32, size, mode)) {
8627 				rval = EFAULT;
8628 				goto fail;
8629 			}
8630 			portioc32.ibdioc.ioc_status = 0;
8631 			portioc32.ibdioc.ioc_portnum = port_state->id_port;
8632 			portioc32.ibdioc.ioc_hcaguid =
8633 			    port_state->id_hca_guid;
8634 			portioc32.ibdioc.ioc_portguid =
8635 			    port_state->id_port_guid;
8636 			portioc32.ioc_pkey_tbl_sz = pinfop->p_pkey_tbl_sz;
8637 			if (ddi_copyout((void *)&portioc32, (void *)arg, size,
8638 			    mode)) {
8639 				rval = EFAULT;
8640 				goto fail;
8641 			}
8642 			break;
8643 		}
8644 		case DDI_MODEL_NONE:
8645 			size = sizeof (ibport_ioctl_t);
8646 			if (ddi_copyin((void *)arg, &portioc, size, mode)) {
8647 				rval = EFAULT;
8648 				goto fail;
8649 			}
8650 			portioc.ibdioc.ioc_status = 0;
8651 			portioc.ibdioc.ioc_portnum = port_state->id_port;
8652 			portioc.ibdioc.ioc_hcaguid = port_state->id_hca_guid;
8653 			portioc.ibdioc.ioc_portguid = port_state->id_port_guid;
8654 			portioc.ioc_pkey_tbl_sz = pinfop->p_pkey_tbl_sz;
8655 			if (ddi_copyout((void *)&portioc, (void *)arg, size,
8656 			    mode)) {
8657 				rval = EFAULT;
8658 				goto fail;
8659 			}
8660 			break;
8661 		}
8662 #else /* ! _MULTI_DATAMODEL */
8663 		size = sizeof (ibport_ioctl_t);
8664 		if (ddi_copyin((void *)arg, &portioc, size, mode)) {
8665 			rval = EFAULT;
8666 			goto fail;
8667 		}
8668 		portioc.ibdioc.ioc_status = 0;
8669 		portioc.ibdioc.ioc_portnum = port_state->id_port;
8670 		portioc.ibdioc.ioc_hcaguid = port_state->id_hca_guid;
8671 		portioc.ibdioc.ioc_portguid = port_state->id_port_guid;
8672 		portioc.ioc_pkey_tbl_sz = pinfop->p_pkey_tbl_sz;
8673 		if (ddi_copyout((void *)&portioc, (void *)arg, size,
8674 		    mode)) {
8675 			rval = EFAULT;
8676 			goto fail;
8677 		}
8678 #endif /* _MULTI_DATAMODEL */
8679 		break;
8680 
8681 	default:
8682 		return (EINVAL);
8683 
8684 	} /* switch (cmd.ioc_info_cmd) */
8685 fail:
8686 	if (pinfop) {
8687 		ibt_free_portinfo(pinfop, pinfosz);
8688 	}
8689 	return (rval);
8690 }
8691 
8692 /* ARGSUSED */
8693 static void
ibdpd_async_handler(void * arg,ibt_hca_hdl_t hca_hdl,ibt_async_code_t code,ibt_async_event_t * event)8694 ibdpd_async_handler(void *arg, ibt_hca_hdl_t hca_hdl,
8695     ibt_async_code_t code, ibt_async_event_t *event)
8696 {
8697 	ibd_state_t *state = (ibd_state_t *)arg;
8698 	link_state_t	lstate;
8699 
8700 	switch (code) {
8701 	case IBT_EVENT_PORT_UP:
8702 	case IBT_ERROR_PORT_DOWN:
8703 		if (ibd_get_port_state(state, &lstate) != 0)
8704 			break;
8705 
8706 		if (state->id_link_state != lstate) {
8707 			state->id_link_state = lstate;
8708 			mac_link_update(state->id_mh, lstate);
8709 		}
8710 		break;
8711 	default:
8712 		break;
8713 	}
8714 }
8715 
8716 static int
ibd_get_port_state(ibd_state_t * state,link_state_t * lstate)8717 ibd_get_port_state(ibd_state_t *state, link_state_t *lstate)
8718 {
8719 	ibt_hca_portinfo_t *port_infop;
8720 	uint_t psize, port_infosz;
8721 	ibt_status_t	ret;
8722 
8723 	ret = ibt_query_hca_ports(state->id_hca_hdl, state->id_port,
8724 	    &port_infop, &psize, &port_infosz);
8725 	if ((ret != IBT_SUCCESS) || (psize != 1))
8726 		return (-1);
8727 
8728 	state->id_sgid = *port_infop->p_sgid_tbl;
8729 	state->id_link_speed = ibd_get_portspeed(state);
8730 
8731 	if (port_infop->p_linkstate == IBT_PORT_ACTIVE)
8732 		*lstate = LINK_STATE_UP;
8733 	else
8734 		*lstate = LINK_STATE_DOWN;
8735 
8736 	ibt_free_portinfo(port_infop, port_infosz);
8737 	return (0);
8738 }
8739 
8740 static int
ibd_port_attach(dev_info_t * dip)8741 ibd_port_attach(dev_info_t *dip)
8742 {
8743 	ibd_state_t		*state;
8744 	link_state_t		lstate;
8745 	int			instance;
8746 	ibt_status_t		ret;
8747 
8748 	/*
8749 	 * Allocate softstate structure
8750 	 */
8751 	instance = ddi_get_instance(dip);
8752 	if (ddi_soft_state_zalloc(ibd_list, instance) == DDI_FAILURE) {
8753 		DPRINT(10, "ibd_port_attach: ddi_soft_state_zalloc() failed");
8754 		return (DDI_FAILURE);
8755 	}
8756 
8757 	state = ddi_get_soft_state(ibd_list, instance);
8758 
8759 	state->id_dip = dip;
8760 	state->id_type = IBD_PORT_DRIVER;
8761 
8762 	if ((state->id_port = ddi_prop_get_int(DDI_DEV_T_ANY, dip, 0,
8763 	    "port-number", 0)) == 0) {
8764 		DPRINT(10, "ibd_port_attach: invalid port number (%d)",
8765 		    state->id_port);
8766 		return (DDI_FAILURE);
8767 	}
8768 	if ((state->id_hca_guid = ddi_prop_get_int64(DDI_DEV_T_ANY, dip, 0,
8769 	    "hca-guid", 0)) == 0) {
8770 		DPRINT(10, "ibd_port_attach: hca has invalid guid (0x%llx)",
8771 		    state->id_hca_guid);
8772 		return (DDI_FAILURE);
8773 	}
8774 	if ((state->id_port_guid = ddi_prop_get_int64(DDI_DEV_T_ANY, dip, 0,
8775 	    "port-guid", 0)) == 0) {
8776 		DPRINT(10, "ibd_port_attach: port has invalid guid (0x%llx)",
8777 		    state->id_port_guid);
8778 		return (DDI_FAILURE);
8779 	}
8780 
8781 	/*
8782 	 * Attach to IBTL
8783 	 */
8784 	if ((ret = ibt_attach(&ibdpd_clnt_modinfo, dip, state,
8785 	    &state->id_ibt_hdl)) != IBT_SUCCESS) {
8786 		DPRINT(10, "ibd_port_attach: failed in ibt_attach(), ret=%d",
8787 		    ret);
8788 		goto done;
8789 	}
8790 
8791 	state->id_mac_state |= IBD_DRV_IBTL_ATTACH_DONE;
8792 
8793 	if ((ret = ibt_open_hca(state->id_ibt_hdl, state->id_hca_guid,
8794 	    &state->id_hca_hdl)) != IBT_SUCCESS) {
8795 		DPRINT(10, "ibd_port_attach: ibt_open_hca() failed, ret=%d",
8796 		    ret);
8797 		goto done;
8798 	}
8799 	state->id_mac_state |= IBD_DRV_HCA_OPENED;
8800 
8801 	/* Update link status */
8802 
8803 	if (ibd_get_port_state(state, &lstate) != 0) {
8804 		DPRINT(10, "ibd_port_attach: ibt_open_hca() failed, ret=%d",
8805 		    ret);
8806 		goto done;
8807 	}
8808 	state->id_link_state = lstate;
8809 	/*
8810 	 * Register ibd interfaces with the Nemo framework
8811 	 */
8812 	if (ibd_register_mac(state, dip) != IBT_SUCCESS) {
8813 		DPRINT(10, "ibd_port_attach: failed in ibd_register_mac()");
8814 		goto done;
8815 	}
8816 	state->id_mac_state |= IBD_DRV_MAC_REGISTERED;
8817 
8818 	mac_link_update(state->id_mh, lstate);
8819 
8820 	return (DDI_SUCCESS);
8821 done:
8822 	(void) ibd_port_unattach(state, dip);
8823 	return (DDI_FAILURE);
8824 }
8825 
8826 static int
ibd_port_unattach(ibd_state_t * state,dev_info_t * dip)8827 ibd_port_unattach(ibd_state_t *state, dev_info_t *dip)
8828 {
8829 	int instance;
8830 	uint32_t progress = state->id_mac_state;
8831 	ibt_status_t ret;
8832 
8833 	if (progress & IBD_DRV_MAC_REGISTERED) {
8834 		(void) mac_unregister(state->id_mh);
8835 		state->id_mac_state &= (~IBD_DRV_MAC_REGISTERED);
8836 	}
8837 
8838 	if (progress & IBD_DRV_HCA_OPENED) {
8839 		if ((ret = ibt_close_hca(state->id_hca_hdl)) !=
8840 		    IBT_SUCCESS) {
8841 			ibd_print_warn(state, "failed to close "
8842 			    "HCA device, ret=%d", ret);
8843 		}
8844 		state->id_hca_hdl = NULL;
8845 		state->id_mac_state &= (~IBD_DRV_HCA_OPENED);
8846 	}
8847 
8848 	if (progress & IBD_DRV_IBTL_ATTACH_DONE) {
8849 		if ((ret = ibt_detach(state->id_ibt_hdl)) != IBT_SUCCESS) {
8850 			ibd_print_warn(state,
8851 			    "ibt_detach() failed, ret=%d", ret);
8852 		}
8853 		state->id_ibt_hdl = NULL;
8854 		state->id_mac_state &= (~IBD_DRV_IBTL_ATTACH_DONE);
8855 	}
8856 	instance = ddi_get_instance(dip);
8857 	ddi_soft_state_free(ibd_list, instance);
8858 
8859 	return (DDI_SUCCESS);
8860 }
8861 
8862 ibt_status_t
ibd_get_part_attr(datalink_id_t linkid,ibt_part_attr_t * attr)8863 ibd_get_part_attr(datalink_id_t linkid, ibt_part_attr_t *attr)
8864 {
8865 	ibd_state_t	*state;
8866 
8867 	mutex_enter(&ibd_objlist_lock);
8868 
8869 	/* Find the ibd state structure corresponding the partition */
8870 	for (state = ibd_objlist_head; state; state = state->id_next) {
8871 		if (state->id_plinkid == linkid) {
8872 			break;
8873 		}
8874 	}
8875 
8876 	if (state == NULL) {
8877 		mutex_exit(&ibd_objlist_lock);
8878 		return (IBT_NO_SUCH_OBJECT);
8879 	}
8880 
8881 	attr->pa_dlinkid = state->id_dlinkid;
8882 	attr->pa_plinkid = state->id_plinkid;
8883 	attr->pa_port = state->id_port;
8884 	attr->pa_hca_guid = state->id_hca_guid;
8885 	attr->pa_port_guid = state->id_port_guid;
8886 	attr->pa_pkey = state->id_pkey;
8887 
8888 	mutex_exit(&ibd_objlist_lock);
8889 
8890 	return (IBT_SUCCESS);
8891 }
8892 
8893 ibt_status_t
ibd_get_all_part_attr(ibt_part_attr_t ** attr_list,int * nparts)8894 ibd_get_all_part_attr(ibt_part_attr_t **attr_list, int *nparts)
8895 {
8896 	ibd_state_t	*state;
8897 	int		n = 0;
8898 	ibt_part_attr_t	*attr;
8899 
8900 	mutex_enter(&ibd_objlist_lock);
8901 
8902 	for (state = ibd_objlist_head; state; state = state->id_next)
8903 		n++;
8904 
8905 	*nparts = n;
8906 	if (n == 0) {
8907 		*attr_list = NULL;
8908 		mutex_exit(&ibd_objlist_lock);
8909 		return (IBT_SUCCESS);
8910 	}
8911 
8912 	*attr_list = kmem_alloc(sizeof (ibt_part_attr_t) * n, KM_SLEEP);
8913 	attr = *attr_list;
8914 	for (state = ibd_objlist_head; state; state = state->id_next) {
8915 #ifdef DEBUG
8916 		ASSERT(n > 0);
8917 		n--;
8918 #endif
8919 		attr->pa_dlinkid = state->id_dlinkid;
8920 		attr->pa_plinkid = state->id_plinkid;
8921 		attr->pa_port = state->id_port;
8922 		attr->pa_hca_guid = state->id_hca_guid;
8923 		attr->pa_port_guid = state->id_port_guid;
8924 		attr->pa_pkey = state->id_pkey;
8925 		attr++;
8926 	}
8927 
8928 	mutex_exit(&ibd_objlist_lock);
8929 	return (IBT_SUCCESS);
8930 }
8931