xref: /titanic_41/usr/src/uts/intel/io/dktp/hba/ghd/ghd.h (revision 507c32411f3f101e90ca2120f042b5ee698ba1d5)
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 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef _GHD_H
28 #define	_GHD_H
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35 
36 #include <sys/types.h>
37 #include <sys/conf.h>
38 #include <sys/kmem.h>
39 #include <sys/ddi.h>
40 #include <sys/sunddi.h>
41 #include <sys/debug.h>
42 #include <sys/scsi/scsi.h>
43 
44 #include "ghd_queue.h"		/* linked list structures */
45 #include "ghd_scsi.h"
46 #include "ghd_waitq.h"
47 #include "ghd_debug.h"
48 
49 #ifndef	TRUE
50 #define	TRUE	1
51 #endif
52 
53 #ifndef	FALSE
54 #define	FALSE	0
55 #endif
56 
57 /*
58  * values for cmd_state:
59  */
60 
61 typedef enum {
62 	GCMD_STATE_IDLE = 0,
63 	GCMD_STATE_WAITQ,
64 	GCMD_STATE_ACTIVE,
65 	GCMD_STATE_DONEQ,
66 	GCMD_STATE_ABORTING_CMD,
67 	GCMD_STATE_ABORTING_DEV,
68 	GCMD_STATE_RESETTING_DEV,
69 	GCMD_STATE_RESETTING_BUS,
70 	GCMD_STATE_HUNG,
71 	GCMD_NSTATES
72 } cmdstate_t;
73 
74 /*
75  * action codes for the HBA timeout function
76  */
77 
78 typedef enum {
79 	GACTION_EARLY_TIMEOUT = 0,	/* timed-out before started */
80 	GACTION_EARLY_ABORT,		/* scsi_abort() before started */
81 	GACTION_ABORT_CMD,		/* abort a specific request */
82 	GACTION_ABORT_DEV,		/* abort everything on specifici dev */
83 	GACTION_RESET_TARGET,		/* reset a specific dev */
84 	GACTION_RESET_BUS,		/* reset the whole bus */
85 	GACTION_INCOMPLETE		/* giving up on incomplete request */
86 } gact_t;
87 
88 /*
89  * types of ghd_timer_poll() invocations
90  */
91 
92 typedef enum {
93 	GHD_TIMER_POLL_ALL = 0,		/* time out all expired commands */
94 	GHD_TIMER_POLL_ONE		/* time out one, let caller loop */
95 } gtimer_poll_t;
96 
97 /*
98  * the common portion of the Command Control Block
99  */
100 
101 typedef struct ghd_cmd {
102 	L2el_t		 cmd_q;		/* link for for done/active CCB Qs */
103 	cmdstate_t	 cmd_state;	/* request's current state */
104 	ulong_t		 cmd_waitq_level; /* which wait Q this request is on */
105 	int		 cmd_flags;	/* generic magic info */
106 
107 	L2el_t		 cmd_timer_link; /* ccb timer doubly linked list */
108 	ulong_t		 cmd_start_time; /* lbolt at start of request */
109 	ulong_t		 cmd_timeout;	/* how long to wait */
110 
111 	opaque_t	 cmd_private;	/* used by the HBA driver */
112 	void		*cmd_pktp;	/* request packet */
113 	gtgt_t		*cmd_gtgtp;	/* dev instance for this request */
114 
115 	int		 cmd_dma_flags;
116 	ddi_dma_handle_t cmd_dma_handle;
117 	ddi_dma_win_t	 cmd_dmawin;
118 	ddi_dma_seg_t	 cmd_dmaseg;
119 
120 	uint_t		 cmd_wcount;	/* ddi_dma_attr: window count */
121 	uint_t		 cmd_windex;	/* ddi_dma_attr: current window */
122 	uint_t		 cmd_ccount;	/* ddi_dma_attr: cookie count */
123 	uint_t		 cmd_cindex;	/* ddi_dma_attr: current cookie */
124 
125 	long		 cmd_totxfer;	/* # bytes transferred so far */
126 	ddi_dma_cookie_t cmd_first_cookie;
127 	int		 use_first;
128 } gcmd_t;
129 
130 
131 /* definitions for cmd_flags */
132 #define	GCMDFLG_RESET_NOTIFY	1	/* command is a reset notification */
133 
134 /*
135  * Initialize the gcmd_t structure
136  */
137 
138 #define	GHD_GCMD_INIT(gcmdp, cmdp, gtgtp)	\
139 	(L2_INIT(&(gcmdp)->cmd_q),		\
140 	L2_INIT(&(gcmdp)->cmd_timer_link),	\
141 	(gcmdp)->cmd_private = (cmdp),		\
142 	(gcmdp)->cmd_gtgtp = (gtgtp)		\
143 )
144 
145 
146 /*
147  * CMD/CCB timer config structure - one per HBA driver module
148  */
149 typedef struct tmr_conf {
150 	kmutex_t	t_mutex;	/* mutex to protect t_ccc_listp */
151 	timeout_id_t	t_timeout_id;	/* handle for timeout() function */
152 	long		t_ticks;	/* periodic timeout in clock ticks */
153 	int		t_refs;		/* reference count */
154 	struct cmd_ctl	*t_ccc_listp;	/* control struct list, one per HBA */
155 } tmr_t;
156 
157 
158 
159 /*
160  * CMD/CCB timer control structure - one per HBA instance (per board)
161  */
162 typedef struct cmd_ctl {
163 	struct cmd_ctl	*ccc_nextp;	/* list of control structs */
164 	struct tmr_conf	*ccc_tmrp;	/* back ptr to config struct */
165 	char		*ccc_label;	/* name of this HBA driver */
166 
167 	kmutex_t ccc_activel_mutex;	/* mutex to protect list ... */
168 	L2el_t	 ccc_activel;		/* ... list of active CMD/CCBs */
169 
170 	dev_info_t *ccc_hba_dip;
171 	ddi_iblock_cookie_t ccc_iblock;
172 	ddi_softintr_t  ccc_soft_id;	/* ID for timeout softintr */
173 
174 	kmutex_t ccc_hba_mutex;		/* mutex for HBA soft-state */
175 	int	 ccc_hba_pollmode;	/* FLAG_NOINTR mode active? */
176 
177 	L1_t	 ccc_devs;		/* unsorted list of attached devs */
178 	kmutex_t ccc_waitq_mutex;	/* mutex to protect device wait Qs */
179 	Q_t	 ccc_waitq;		/* the HBA's wait queue */
180 	clock_t	 ccc_waitq_freezetime;	/* time the waitq was frozen, ticks */
181 	uint_t	 ccc_waitq_freezedelay;	/* delta time until waitq thaws, ms */
182 
183 	ddi_softintr_t  ccc_doneq_softid; /* ID for doneq softintr */
184 	kmutex_t ccc_doneq_mutex;	/* mutex to protect the doneq */
185 	L2el_t	 ccc_doneq; 		/* completed cmd_t's */
186 
187 	void	*ccc_hba_handle;
188 	int	(*ccc_ccballoc)();	/* alloc/init gcmd and ccb */
189 	void	(*ccc_ccbfree)();
190 	void	(*ccc_sg_func)();
191 	int	(*ccc_hba_start)(void *handle, gcmd_t *);
192 	void    (*ccc_hba_complete)(void *handle, gcmd_t *, int);
193 	void	(*ccc_process_intr)(void *handle, void *intr_status);
194 	int	(*ccc_get_status)(void *handle, void *intr_status);
195 	int	(*ccc_timeout_func)(void *handle, gcmd_t *cmdp, gtgt_t *gtgtp,
196 			gact_t action, int calltype);
197 	void 	(*ccc_hba_reset_notify_callback)(gtgt_t *gtgtp,
198 			void (*callback)(caddr_t),
199 			caddr_t arg);
200 	L2el_t	 ccc_reset_notify_list;	/* list of reset notifications */
201 	kmutex_t ccc_reset_notify_mutex; /* and a mutex to protect it */
202 	char	 ccc_timeout_pending;	/* timeout Q's softintr is triggered */
203 	char	 ccc_waitq_frozen;	/* ccc_waitq_freezetime non-null */
204 	char	 ccc_waitq_held;	/* frozen, but no freezetime */
205 } ccc_t;
206 
207 #define	GHBA_QHEAD(cccp)	((cccp)->ccc_waitq.Q_qhead)
208 #define	GHBA_MAXACTIVE(cccp)	((cccp)->ccc_waitq.Q_maxactive)
209 #define	GHBA_NACTIVE(cccp)	((cccp)->ccc_waitq.Q_nactive)
210 
211 /* Initialize the HBA's list headers */
212 #define	CCCP_INIT(cccp)	{				\
213 		L1HEADER_INIT(&(cccp)->ccc_devs);	\
214 		L2_INIT(&(cccp)->ccc_doneq);		\
215 		L2_INIT(&(cccp)->ccc_reset_notify_list);	\
216 }
217 
218 
219 #define	CCCP2GDEVP(cccp)					\
220 	(L1_EMPTY(&(cccp)->ccc_devs)				\
221 	? (gdev_t *)NULL					\
222 	: (gdev_t *)((cccp)->ccc_devs.l1_headp->le_datap))
223 
224 
225 /*
226  * reset_notify handling: these elements are on the ccc_t's
227  * reset_notify_list, one for each notification requested.  The
228  * gtgtp isn't needed except for debug.
229  */
230 
231 typedef struct ghd_reset_notify_list {
232 	gtgt_t *gtgtp;
233 	void (*callback)(caddr_t);
234 	caddr_t	arg;
235 	L2el_t l2_link;
236 } ghd_reset_notify_list_t;
237 
238 /* ******************************************************************* */
239 
240 #include "ghd_scsa.h"
241 #include "ghd_dma.h"
242 
243 /*
244  * GHD Entry Points
245  */
246 void	 ghd_complete(ccc_t *cccp, gcmd_t *cmdp);
247 void	 ghd_doneq_put_head(ccc_t *cccp, gcmd_t *cmdp);
248 void	 ghd_doneq_put_tail(ccc_t *cccp, gcmd_t *cmdp);
249 
250 int	 ghd_intr(ccc_t *cccp, void *status);
251 int	 ghd_register(char *, ccc_t *, dev_info_t *, int, void *hba_handle,
252 			int (*ccc_ccballoc)(gtgt_t *, gcmd_t *, int, int,
253 					    int, int),
254 			void (*ccc_ccbfree)(gcmd_t *),
255 			void (*ccc_sg_func)(gcmd_t *, ddi_dma_cookie_t *,
256 					    int, int),
257 			int  (*hba_start)(void *, gcmd_t *),
258 			void (*hba_complete)(void *, gcmd_t *, int),
259 			uint_t (*int_handler)(caddr_t),
260 			int  (*get_status)(void *, void *),
261 			void (*process_intr)(void *, void *),
262 			int  (*timeout_func)(void *, gcmd_t *, gtgt_t *,
263 				gact_t, int),
264 			tmr_t *tmrp,
265 			void (*hba_reset_notify_callback)(gtgt_t *,
266 				void (*)(caddr_t), caddr_t));
267 void	ghd_unregister(ccc_t *cccp);
268 
269 int	ghd_transport(ccc_t *cccp, gcmd_t *cmdp, gtgt_t *gtgtp,
270 	    ulong_t timeout, int polled, void *intr_status);
271 
272 int	ghd_tran_abort(ccc_t *cccp, gcmd_t *cmdp, gtgt_t *gtgtp,
273 	    void *intr_status);
274 int	ghd_tran_abort_lun(ccc_t *cccp, gtgt_t *gtgtp, void *intr_status);
275 int	ghd_tran_reset_target(ccc_t *cccp, gtgt_t *gtgtp, void *intr_status);
276 int	ghd_tran_reset_bus(ccc_t *cccp, gtgt_t *gtgtp, void *intr_status);
277 int	ghd_reset_notify(ccc_t *cccp, gtgt_t *gtgtp, int flag,
278 	    void (*callback)(caddr_t), caddr_t arg);
279 void	ghd_freeze_waitq(ccc_t *cccp, int delay);
280 void	ghd_trigger_reset_notify(ccc_t *cccp);
281 
282 void	 ghd_queue_hold(ccc_t *cccp);
283 void	 ghd_queue_unhold(ccc_t *cccp);
284 
285 /*
286  * Allocate a gcmd_t wrapper and HBA private area
287  */
288 gcmd_t	*ghd_gcmd_alloc(gtgt_t *gtgtp, int ccblen, int sleep);
289 
290 /*
291  * Free the gcmd_t wrapper and HBA private area
292  */
293 void	ghd_gcmd_free(gcmd_t *gcmdp);
294 
295 
296 /*
297  * GHD CMD/CCB timer Entry points
298  */
299 
300 int	ghd_timer_attach(ccc_t *cccp, tmr_t *tmrp,
301 	    int (*timeout_func)(void *handle, gcmd_t *, gtgt_t *,
302 	    gact_t, int));
303 void	ghd_timer_detach(ccc_t *cccp);
304 void	ghd_timer_fini(tmr_t *tmrp);
305 void	ghd_timer_init(tmr_t *tmrp, long ticks);
306 void	ghd_timer_newstate(ccc_t *cccp, gcmd_t *cmdp, gtgt_t *gtgtp,
307 	    gact_t action, int calltype);
308 void	ghd_timer_poll(ccc_t *cccp, gtimer_poll_t calltype);
309 void	ghd_timer_start(ccc_t *cccp, gcmd_t *cmdp, long cmd_timeout);
310 void	ghd_timer_stop(ccc_t *cccp, gcmd_t *cmdp);
311 
312 
313 /*
314  * Wait queue utility routines
315  */
316 
317 gtgt_t	*ghd_target_init(dev_info_t *, dev_info_t *, ccc_t *, size_t,
318 	    void *, ushort_t, uchar_t);
319 void	 ghd_target_free(dev_info_t *, dev_info_t *, ccc_t *, gtgt_t *);
320 void	 ghd_waitq_shuffle_up(ccc_t *, gdev_t *);
321 void	 ghd_waitq_delete(ccc_t *, gcmd_t *);
322 int	 ghd_waitq_process_and_mutex_hold(ccc_t *);
323 void	 ghd_waitq_process_and_mutex_exit(ccc_t *);
324 
325 
326 /*
327  * The values for the calltype arg for the ghd_timer_newstate() function,
328  * and the HBA timeout-action function (ccc_timeout_func)
329  */
330 
331 #define	GHD_TGTREQ		0
332 #define	GHD_TIMEOUT		1
333 
334 /* ******************************************************************* */
335 
336 /*
337  * specify GHD_INLINE to get optimized versions
338  */
339 #define	GHD_INLINE	1
340 #if defined(GHD_DEBUG) || defined(DEBUG) || defined(__lint)
341 #undef	GHD_INLINE
342 #endif
343 
344 #if defined(GHD_INLINE)
345 #define	GHD_COMPLETE(cccp, gcmpd)	GHD_COMPLETE_INLINE(cccp, gcmdp)
346 #define	GHD_TIMER_STOP(cccp, gcmdp)	GHD_TIMER_STOP_INLINE(cccp, gcmdp)
347 #define	GHD_DONEQ_PUT_HEAD(cccp, gcmdp)	GHD_DONEQ_PUT_HEAD_INLINE(cccp, gcmdp)
348 #define	GHD_DONEQ_PUT_TAIL(cccp, gcmdp)	GHD_DONEQ_PUT_TAIL_INLINE(cccp, gcmdp)
349 #else
350 #define	GHD_COMPLETE(cccp, gcmpd)	ghd_complete(cccp, gcmdp)
351 #define	GHD_TIMER_STOP(cccp, gcmdp)	ghd_timer_stop(cccp, gcmdp)
352 #define	GHD_DONEQ_PUT_HEAD(cccp, gcmdp)	ghd_doneq_put_head(cccp, gcmdp)
353 #define	GHD_DONEQ_PUT_TAIL(cccp, gcmdp)	ghd_doneq_put_tail(cccp, gcmdp)
354 #endif
355 
356 /*
357  * request is complete, stop the request timer and add to doneq
358  */
359 #define	GHD_COMPLETE_INLINE(cccp, gcmdp)	\
360 {						\
361 	ghd_waitq_delete(cccp, gcmdp);		\
362 	(gcmdp)->cmd_state = GCMD_STATE_DONEQ;	\
363 	GHD_TIMER_STOP((cccp), (gcmdp));	\
364 	GHD_DONEQ_PUT_TAIL((cccp), (gcmdp));	\
365 }
366 
367 #define	GHD_TIMER_STOP_INLINE(cccp, gcmdp)	\
368 {						\
369 	mutex_enter(&(cccp)->ccc_activel_mutex);\
370 	L2_delete(&(gcmdp)->cmd_timer_link);	\
371 	mutex_exit(&(cccp)->ccc_activel_mutex);	\
372 }
373 
374 /*
375  * mark the request done and append it to the head of the doneq
376  */
377 #define	GHD_DONEQ_PUT_HEAD_INLINE(cccp, gcmdp)			\
378 {								\
379 	kmutex_t *doneq_mutexp = &(cccp)->ccc_doneq_mutex;	\
380 								\
381 	mutex_enter(doneq_mutexp);				\
382 	(gcmdp)->cmd_state = GCMD_STATE_DONEQ;			\
383 	L2_add_head(&(cccp)->ccc_doneq, &(gcmdp)->cmd_q, (gcmdp));	\
384 	if (!(cccp)->ccc_hba_pollmode)				\
385 		ddi_trigger_softintr((cccp)->ccc_doneq_softid);	\
386 	mutex_exit(doneq_mutexp);				\
387 }
388 
389 /*
390  * mark the request done and append it to the tail of the doneq
391  */
392 #define	GHD_DONEQ_PUT_TAIL_INLINE(cccp, gcmdp)			\
393 {								\
394 	kmutex_t *doneq_mutexp = &(cccp)->ccc_doneq_mutex;	\
395 								\
396 	mutex_enter(doneq_mutexp);				\
397 	(gcmdp)->cmd_state = GCMD_STATE_DONEQ;			\
398 	L2_add(&(cccp)->ccc_doneq, &(gcmdp)->cmd_q, (gcmdp));	\
399 	if (!(cccp)->ccc_hba_pollmode)				\
400 		ddi_trigger_softintr((cccp)->ccc_doneq_softid);	\
401 	mutex_exit(doneq_mutexp);				\
402 }
403 
404 /* ******************************************************************* */
405 
406 /*
407  * These are shortcut macros for linkages setup by GHD
408  */
409 
410 /*
411  * (gcmd_t *) to (struct scsi_pkt *)
412  */
413 #define	GCMDP2PKTP(gcmdp)	((gcmdp)->cmd_pktp)
414 
415 /*
416  * (gcmd_t *) to (gtgt_t *)
417  */
418 #define	GCMDP2GTGTP(gcmdp)	((gcmdp)->cmd_gtgtp)
419 
420 /*
421  * (gcmd_t *) to (gdev_t *)
422  */
423 #define	GCMDP2GDEVP(gcmdp)	((gcmdp)->cmd_gtgtp->gt_gdevp)
424 
425 /*
426  * (gcmd_t *) to (ccc_t *)
427  */
428 #define	GCMDP2CCCP(gcmdp)	(GCMDP2GTGTP(gcmdp)->gt_ccc)
429 
430 /*
431  * (struct scsi_pkt *) to (gcmd_t *)
432  */
433 #define	PKTP2GCMDP(pktp)	((gcmd_t *)(pktp)->pkt_ha_private)
434 
435 
436 /* These are shortcut macros for linkages setup by SCSA */
437 
438 /*
439  * (struct scsi_address *) to (scsi_hba_tran *)
440  */
441 #define	ADDR2TRAN(ap)		((ap)->a_hba_tran)
442 
443 /*
444  * (struct scsi_device *) to (scsi_address *)
445  */
446 #define	SDEV2ADDR(sdp)		(&(sdp)->sd_address)
447 
448 /*
449  * (struct scsi_device *) to (scsi_hba_tran *)
450  */
451 #define	SDEV2TRAN(sdp)		ADDR2TRAN(SDEV2ADDR(sdp))
452 
453 /*
454  * (struct scsi_pkt *) to (scsi_hba_tran *)
455  */
456 #define	PKTP2TRAN(pktp)		ADDR2TRAN(&(pktp)->pkt_address)
457 
458 /*
459  * (scsi_hba_tran_t *) to (per-target-soft-state *)
460  */
461 #define	TRAN2GTGTP(tranp)	((gtgt_t *)((tranp)->tran_tgt_private))
462 
463 /*
464  * (struct scsi_device *) to (per-target-soft-state *)
465  */
466 #define	SDEV2GTGTP(sd)  	TRAN2GTGTP(SDEV2TRAN(sd))
467 
468 /*
469  * (struct scsi_pkt *) to (per-target-soft-state *)
470  */
471 #define	PKTP2GTGTP(pktp)	TRAN2GTGTP(PKTP2TRAN(pktp))
472 
473 
474 /*
475  * (scsi_hba_tran_t *) to (per-HBA-soft-state *)
476  */
477 #define	TRAN2HBA(tranp)		((tranp)->tran_hba_private)
478 
479 
480 /*
481  * (struct scsi_device *) to (per-HBA-soft-state *)
482  */
483 #define	SDEV2HBA(sd)		TRAN2HBA(SDEV2TRAN(sd))
484 
485 /*
486  * (struct scsi_address *) to (per-target-soft-state *)
487  */
488 #define	ADDR2GTGTP(ap)  	TRAN2GTGTP(ADDR2TRAN(ap))
489 
490 /* ******************************************************************* */
491 
492 
493 #ifdef __cplusplus
494 }
495 #endif
496 
497 #endif /* _GHD_H */
498