1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2009 Silicon Graphics International Corp.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * substantially similar to the "NO WARRANTY" disclaimer below
15 * ("Disclaimer") and any redistribution must be conditioned upon
16 * including a substantially similar Disclaimer requirement for further
17 * binary redistribution.
18 *
19 * NO WARRANTY
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGES.
31 *
32 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend_cam_sim.c#4 $
33 */
34 /*
35 * CTL frontend to CAM SIM interface. This allows access to CTL LUNs via
36 * the da(4) and pass(4) drivers from inside the system.
37 *
38 * Author: Ken Merry <ken@FreeBSD.org>
39 */
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/types.h>
45 #include <sys/malloc.h>
46 #include <sys/bus.h>
47 #include <sys/sysctl.h>
48 #include <machine/atomic.h>
49 #include <machine/bus.h>
50 #include <sys/sbuf.h>
51
52 #include <cam/cam.h>
53 #include <cam/cam_ccb.h>
54 #include <cam/cam_sim.h>
55 #include <cam/cam_xpt_sim.h>
56 #include <cam/cam_xpt.h>
57 #include <cam/cam_periph.h>
58 #include <cam/scsi/scsi_all.h>
59 #include <cam/scsi/scsi_message.h>
60 #include <cam/ctl/ctl_io.h>
61 #include <cam/ctl/ctl.h>
62 #include <cam/ctl/ctl_frontend.h>
63 #include <cam/ctl/ctl_debug.h>
64
65 #define io_ptr spriv_ptr1
66
67 struct cfcs_io {
68 union ccb *ccb;
69 };
70
71 struct cfcs_softc {
72 struct ctl_port port;
73 char port_name[32];
74 struct cam_sim *sim;
75 struct cam_devq *devq;
76 struct cam_path *path;
77 uint64_t wwnn;
78 uint64_t wwpn;
79 uint32_t cur_tag_num;
80 int online;
81 };
82
83 /*
84 * We can't handle CCBs with these flags. For the most part, we just don't
85 * handle physical addresses yet. That would require mapping things in
86 * order to do the copy.
87 */
88 #define CFCS_BAD_CCB_FLAGS (CAM_DATA_ISPHYS | CAM_CDB_PHYS | CAM_SENSE_PTR | \
89 CAM_SENSE_PHYS)
90
91 static int cfcs_init(void);
92 static int cfcs_shutdown(void);
93 static void cfcs_poll(struct cam_sim *sim);
94 static void cfcs_online(void *arg);
95 static void cfcs_offline(void *arg);
96 static void cfcs_datamove(union ctl_io *io);
97 static void cfcs_done(union ctl_io *io);
98 void cfcs_action(struct cam_sim *sim, union ccb *ccb);
99
100 struct cfcs_softc cfcs_softc;
101 /*
102 * This is primarily intended to allow for error injection to test the CAM
103 * sense data and sense residual handling code. This sets the maximum
104 * amount of SCSI sense data that we will report to CAM.
105 */
106 static int cfcs_max_sense = sizeof(struct scsi_sense_data);
107
108 SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
109 "CAM Target Layer SIM frontend");
110 SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
111 &cfcs_max_sense, 0, "Maximum sense data size");
112
113 static struct ctl_frontend cfcs_frontend =
114 {
115 .name = "camsim",
116 .init = cfcs_init,
117 .shutdown = cfcs_shutdown,
118 };
119 CTL_FRONTEND_DECLARE(ctlcfcs, cfcs_frontend);
120
121 static int
cfcs_init(void)122 cfcs_init(void)
123 {
124 struct cfcs_softc *softc;
125 struct ctl_port *port;
126 int retval;
127
128 softc = &cfcs_softc;
129 bzero(softc, sizeof(*softc));
130 port = &softc->port;
131
132 port->frontend = &cfcs_frontend;
133 port->port_type = CTL_PORT_INTERNAL;
134 /* XXX KDM what should the real number be here? */
135 port->num_requested_ctl_io = 4096;
136 snprintf(softc->port_name, sizeof(softc->port_name), "camsim");
137 port->port_name = softc->port_name;
138 port->port_online = cfcs_online;
139 port->port_offline = cfcs_offline;
140 port->onoff_arg = softc;
141 port->fe_datamove = cfcs_datamove;
142 port->fe_done = cfcs_done;
143 port->targ_port = -1;
144
145 retval = ctl_port_register(port);
146 if (retval != 0) {
147 printf("%s: ctl_port_register() failed with error %d!\n",
148 __func__, retval);
149 return (retval);
150 }
151
152 /*
153 * If the CTL frontend didn't tell us what our WWNN/WWPN is, go
154 * ahead and set something random.
155 */
156 if (port->wwnn == 0) {
157 uint64_t random_bits;
158
159 arc4rand(&random_bits, sizeof(random_bits), 0);
160 softc->wwnn = (random_bits & 0x0000000fffffff00ULL) |
161 /* Company ID */ 0x5000000000000000ULL |
162 /* NL-Port */ 0x0300;
163 softc->wwpn = softc->wwnn + port->targ_port + 1;
164 ctl_port_set_wwns(port, true, softc->wwnn, true, softc->wwpn);
165 } else {
166 softc->wwnn = port->wwnn;
167 softc->wwpn = port->wwpn;
168 }
169
170 softc->devq = cam_simq_alloc(port->num_requested_ctl_io);
171 if (softc->devq == NULL) {
172 printf("%s: error allocating devq\n", __func__);
173 retval = ENOMEM;
174 goto bailout;
175 }
176
177 softc->sim = cam_sim_alloc(cfcs_action, cfcs_poll, softc->port_name,
178 softc, /*unit*/ 0, NULL, 1,
179 port->num_requested_ctl_io, softc->devq);
180 if (softc->sim == NULL) {
181 printf("%s: error allocating SIM\n", __func__);
182 retval = ENOMEM;
183 goto bailout;
184 }
185
186 if (xpt_bus_register(softc->sim, NULL, 0) != CAM_SUCCESS) {
187 printf("%s: error registering SIM\n", __func__);
188 retval = ENOMEM;
189 goto bailout;
190 }
191
192 if (xpt_create_path(&softc->path, /*periph*/NULL,
193 cam_sim_path(softc->sim),
194 CAM_TARGET_WILDCARD,
195 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
196 printf("%s: error creating path\n", __func__);
197 xpt_bus_deregister(cam_sim_path(softc->sim));
198 retval = EINVAL;
199 goto bailout;
200 }
201
202 return (retval);
203
204 bailout:
205 if (softc->sim)
206 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
207 else if (softc->devq)
208 cam_simq_free(softc->devq);
209 return (retval);
210 }
211
212 static int
cfcs_shutdown(void)213 cfcs_shutdown(void)
214 {
215 struct cfcs_softc *softc = &cfcs_softc;
216 struct ctl_port *port = &softc->port;
217 int error;
218
219 ctl_port_offline(port);
220
221 xpt_free_path(softc->path);
222 xpt_bus_deregister(cam_sim_path(softc->sim));
223 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
224
225 if ((error = ctl_port_deregister(port)) != 0)
226 printf("%s: cam_sim port deregistration failed\n", __func__);
227 return (error);
228 }
229
230 static void
cfcs_poll(struct cam_sim * sim)231 cfcs_poll(struct cam_sim *sim)
232 {
233
234 }
235
236 static void
cfcs_onoffline(void * arg,int online)237 cfcs_onoffline(void *arg, int online)
238 {
239 struct cfcs_softc *softc = (struct cfcs_softc *)arg;
240 union ccb *ccb;
241
242 softc->online = online;
243
244 ccb = xpt_alloc_ccb_nowait();
245 if (ccb == NULL) {
246 printf("%s: unable to allocate CCB for rescan\n", __func__);
247 return;
248 }
249
250 if (xpt_create_path(&ccb->ccb_h.path, NULL,
251 cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
252 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
253 printf("%s: can't allocate path for rescan\n", __func__);
254 xpt_free_ccb(ccb);
255 return;
256 }
257 xpt_rescan(ccb);
258 }
259
260 static void
cfcs_online(void * arg)261 cfcs_online(void *arg)
262 {
263 cfcs_onoffline(arg, /*online*/ 1);
264 }
265
266 static void
cfcs_offline(void * arg)267 cfcs_offline(void *arg)
268 {
269 cfcs_onoffline(arg, /*online*/ 0);
270 }
271
272 /*
273 * This function is very similar to ctl_ioctl_do_datamove(). Is there a
274 * way to combine the functionality?
275 *
276 * XXX KDM may need to move this into a thread. We're doing a bcopy in the
277 * caller's context, which will usually be the backend. That may not be a
278 * good thing.
279 */
280 static void
cfcs_datamove(union ctl_io * io)281 cfcs_datamove(union ctl_io *io)
282 {
283 union ccb *ccb;
284 bus_dma_segment_t cam_sg_entry, *cam_sglist;
285 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
286 int cam_sg_count, ctl_sg_count, cam_sg_start;
287 int cam_sg_offset;
288 int len_to_copy;
289 int ctl_watermark, cam_watermark;
290 int i, j;
291
292 ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
293
294 /*
295 * Note that we have a check in cfcs_action() to make sure that any
296 * CCBs with "bad" flags are returned with CAM_REQ_INVALID. This
297 * is just to make sure no one removes that check without updating
298 * this code to provide the additional functionality necessary to
299 * support those modes of operation.
300 */
301 KASSERT(((ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) == 0), ("invalid "
302 "CAM flags %#x", (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS)));
303
304 /*
305 * Simplify things on both sides by putting single buffers into a
306 * single entry S/G list.
307 */
308 switch ((ccb->ccb_h.flags & CAM_DATA_MASK)) {
309 case CAM_DATA_SG: {
310 int len_seen;
311
312 cam_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr;
313 cam_sg_count = ccb->csio.sglist_cnt;
314 cam_sg_start = cam_sg_count;
315 cam_sg_offset = 0;
316
317 for (i = 0, len_seen = 0; i < cam_sg_count; i++) {
318 if ((len_seen + cam_sglist[i].ds_len) >=
319 io->scsiio.kern_rel_offset) {
320 cam_sg_start = i;
321 cam_sg_offset = io->scsiio.kern_rel_offset -
322 len_seen;
323 break;
324 }
325 len_seen += cam_sglist[i].ds_len;
326 }
327 break;
328 }
329 case CAM_DATA_VADDR:
330 cam_sglist = &cam_sg_entry;
331 cam_sglist[0].ds_len = ccb->csio.dxfer_len;
332 cam_sglist[0].ds_addr = (bus_addr_t)(uintptr_t)ccb->csio.data_ptr;
333 cam_sg_count = 1;
334 cam_sg_start = 0;
335 cam_sg_offset = io->scsiio.kern_rel_offset;
336 break;
337 default:
338 panic("Invalid CAM flags %#x", ccb->ccb_h.flags);
339 }
340
341 if (io->scsiio.kern_sg_entries > 0) {
342 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
343 ctl_sg_count = io->scsiio.kern_sg_entries;
344 } else {
345 ctl_sglist = &ctl_sg_entry;
346 ctl_sglist->addr = io->scsiio.kern_data_ptr;
347 ctl_sglist->len = io->scsiio.kern_data_len;
348 ctl_sg_count = 1;
349 }
350
351 ctl_watermark = 0;
352 cam_watermark = cam_sg_offset;
353 for (i = cam_sg_start, j = 0;
354 i < cam_sg_count && j < ctl_sg_count;) {
355 uint8_t *cam_ptr, *ctl_ptr;
356
357 len_to_copy = MIN(cam_sglist[i].ds_len - cam_watermark,
358 ctl_sglist[j].len - ctl_watermark);
359
360 cam_ptr = (uint8_t *)(uintptr_t)cam_sglist[i].ds_addr;
361 cam_ptr = cam_ptr + cam_watermark;
362 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
363 /*
364 * XXX KDM fix this!
365 */
366 panic("need to implement bus address support");
367 #if 0
368 kern_ptr = bus_to_virt(kern_sglist[j].addr);
369 #endif
370 } else
371 ctl_ptr = (uint8_t *)ctl_sglist[j].addr;
372 ctl_ptr = ctl_ptr + ctl_watermark;
373
374 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
375 CTL_FLAG_DATA_IN) {
376 CTL_DEBUG_PRINT(("%s: copying %d bytes to CAM\n",
377 __func__, len_to_copy));
378 CTL_DEBUG_PRINT(("%s: from %p to %p\n", ctl_ptr,
379 __func__, cam_ptr));
380 bcopy(ctl_ptr, cam_ptr, len_to_copy);
381 } else {
382 CTL_DEBUG_PRINT(("%s: copying %d bytes from CAM\n",
383 __func__, len_to_copy));
384 CTL_DEBUG_PRINT(("%s: from %p to %p\n", cam_ptr,
385 __func__, ctl_ptr));
386 bcopy(cam_ptr, ctl_ptr, len_to_copy);
387 }
388
389 io->scsiio.ext_data_filled += len_to_copy;
390 io->scsiio.kern_data_resid -= len_to_copy;
391
392 cam_watermark += len_to_copy;
393 if (cam_sglist[i].ds_len == cam_watermark) {
394 i++;
395 cam_watermark = 0;
396 }
397
398 ctl_watermark += len_to_copy;
399 if (ctl_sglist[j].len == ctl_watermark) {
400 j++;
401 ctl_watermark = 0;
402 }
403 }
404
405 if ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS) {
406 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL;
407 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT;
408 ccb->csio.resid = ccb->csio.dxfer_len -
409 io->scsiio.ext_data_filled;
410 ccb->ccb_h.status &= ~CAM_STATUS_MASK;
411 ccb->ccb_h.status |= CAM_REQ_CMP;
412 xpt_done(ccb);
413 }
414
415 ctl_datamove_done(io, true);
416 }
417
418 static void
cfcs_done(union ctl_io * io)419 cfcs_done(union ctl_io *io)
420 {
421 union ccb *ccb;
422
423 ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
424 if (ccb == NULL) {
425 ctl_free_io(io);
426 return;
427 }
428
429 /*
430 * At this point we should have status. If we don't, that's a bug.
431 */
432 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
433 ("invalid CTL status %#x", io->io_hdr.status));
434
435 /*
436 * Translate CTL status to CAM status.
437 */
438 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
439 ccb->csio.resid = ccb->csio.dxfer_len -
440 io->scsiio.ext_data_filled;
441 }
442 ccb->ccb_h.status &= ~CAM_STATUS_MASK;
443 switch (io->io_hdr.status & CTL_STATUS_MASK) {
444 case CTL_SUCCESS:
445 ccb->ccb_h.status |= CAM_REQ_CMP;
446 break;
447 case CTL_SCSI_ERROR:
448 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
449 ccb->csio.scsi_status = io->scsiio.scsi_status;
450 bcopy(&io->scsiio.sense_data, &ccb->csio.sense_data,
451 min(io->scsiio.sense_len, ccb->csio.sense_len));
452 if (ccb->csio.sense_len > io->scsiio.sense_len)
453 ccb->csio.sense_resid = ccb->csio.sense_len -
454 io->scsiio.sense_len;
455 else
456 ccb->csio.sense_resid = 0;
457 if ((ccb->csio.sense_len - ccb->csio.sense_resid) >
458 cfcs_max_sense) {
459 ccb->csio.sense_resid = ccb->csio.sense_len -
460 cfcs_max_sense;
461 }
462 break;
463 case CTL_CMD_ABORTED:
464 ccb->ccb_h.status |= CAM_REQ_ABORTED;
465 break;
466 case CTL_ERROR:
467 default:
468 ccb->ccb_h.status |= CAM_REQ_CMP_ERR;
469 break;
470 }
471 ctl_free_io(io);
472 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP &&
473 (ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
474 xpt_freeze_devq(ccb->ccb_h.path, 1);
475 ccb->ccb_h.status |= CAM_DEV_QFRZN;
476 }
477 xpt_done(ccb);
478 }
479
480 void
cfcs_action(struct cam_sim * sim,union ccb * ccb)481 cfcs_action(struct cam_sim *sim, union ccb *ccb)
482 {
483 struct cfcs_softc *softc;
484 int err;
485
486 softc = (struct cfcs_softc *)cam_sim_softc(sim);
487
488 switch (ccb->ccb_h.func_code) {
489 case XPT_SCSI_IO: {
490 union ctl_io *io;
491 struct ccb_scsiio *csio;
492
493 csio = &ccb->csio;
494
495 /*
496 * Catch CCB flags, like physical address flags, that
497 * indicate situations we currently can't handle.
498 */
499 if (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) {
500 ccb->ccb_h.status = CAM_REQ_INVALID;
501 printf("%s: bad CCB flags %#x (all flags %#x)\n",
502 __func__, ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS,
503 ccb->ccb_h.flags);
504 xpt_done(ccb);
505 return;
506 }
507
508 /*
509 * If we aren't online, there are no devices to see.
510 */
511 if (softc->online == 0) {
512 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
513 xpt_done(ccb);
514 return;
515 }
516
517 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
518 if (io == NULL) {
519 printf("%s: can't allocate ctl_io\n", __func__);
520 ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
521 xpt_freeze_devq(ccb->ccb_h.path, 1);
522 xpt_done(ccb);
523 return;
524 }
525 ctl_zero_io(io);
526 /* Save pointers on both sides */
527 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
528 ccb->ccb_h.io_ptr = io;
529
530 /*
531 * Only SCSI I/O comes down this path, resets, etc. come
532 * down via the XPT_RESET_BUS/LUN CCBs below.
533 */
534 io->io_hdr.io_type = CTL_IO_SCSI;
535 io->io_hdr.nexus.initid = 1;
536 io->io_hdr.nexus.targ_port = softc->port.targ_port;
537 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
538 CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
539 io->scsiio.priority = csio->priority;
540 /*
541 * This tag scheme isn't the best, since we could in theory
542 * have a very long-lived I/O and tag collision, especially
543 * in a high I/O environment. But it should work well
544 * enough for now. Since we're using unsigned ints,
545 * they'll just wrap around.
546 */
547 io->scsiio.tag_num = atomic_fetchadd_32(&softc->cur_tag_num, 1);
548 csio->tag_id = io->scsiio.tag_num;
549 switch (csio->tag_action) {
550 case CAM_TAG_ACTION_NONE:
551 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
552 break;
553 case MSG_SIMPLE_TASK:
554 io->scsiio.tag_type = CTL_TAG_SIMPLE;
555 break;
556 case MSG_HEAD_OF_QUEUE_TASK:
557 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
558 break;
559 case MSG_ORDERED_TASK:
560 io->scsiio.tag_type = CTL_TAG_ORDERED;
561 break;
562 case MSG_ACA_TASK:
563 io->scsiio.tag_type = CTL_TAG_ACA;
564 break;
565 default:
566 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
567 printf("%s: unhandled tag type %#x!!\n", __func__,
568 csio->tag_action);
569 break;
570 }
571 if (csio->cdb_len > sizeof(io->scsiio.cdb)) {
572 printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
573 __func__, csio->cdb_len, sizeof(io->scsiio.cdb));
574 }
575 io->scsiio.cdb_len = min(csio->cdb_len, sizeof(io->scsiio.cdb));
576 bcopy(scsiio_cdb_ptr(csio), io->scsiio.cdb, io->scsiio.cdb_len);
577
578 ccb->ccb_h.status |= CAM_SIM_QUEUED;
579 err = ctl_queue(io);
580 if (err != CTL_RETVAL_COMPLETE) {
581 printf("%s: func %d: error %d returned by "
582 "ctl_queue()!\n", __func__,
583 ccb->ccb_h.func_code, err);
584 ctl_free_io(io);
585 ccb->ccb_h.status = CAM_REQ_INVALID;
586 xpt_done(ccb);
587 return;
588 }
589 break;
590 }
591 case XPT_ABORT: {
592 union ctl_io *io;
593 union ccb *abort_ccb;
594
595 abort_ccb = ccb->cab.abort_ccb;
596
597 if (abort_ccb->ccb_h.func_code != XPT_SCSI_IO) {
598 ccb->ccb_h.status = CAM_REQ_INVALID;
599 xpt_done(ccb);
600 }
601
602 /*
603 * If we aren't online, there are no devices to talk to.
604 */
605 if (softc->online == 0) {
606 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
607 xpt_done(ccb);
608 return;
609 }
610
611 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
612 if (io == NULL) {
613 ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
614 xpt_freeze_devq(ccb->ccb_h.path, 1);
615 xpt_done(ccb);
616 return;
617 }
618
619 ctl_zero_io(io);
620 /* Save pointers on both sides */
621 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
622 ccb->ccb_h.io_ptr = io;
623
624 io->io_hdr.io_type = CTL_IO_TASK;
625 io->io_hdr.nexus.initid = 1;
626 io->io_hdr.nexus.targ_port = softc->port.targ_port;
627 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
628 CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
629 io->taskio.task_action = CTL_TASK_ABORT_TASK;
630 io->taskio.tag_num = abort_ccb->csio.tag_id;
631 switch (abort_ccb->csio.tag_action) {
632 case CAM_TAG_ACTION_NONE:
633 io->taskio.tag_type = CTL_TAG_UNTAGGED;
634 break;
635 case MSG_SIMPLE_TASK:
636 io->taskio.tag_type = CTL_TAG_SIMPLE;
637 break;
638 case MSG_HEAD_OF_QUEUE_TASK:
639 io->taskio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
640 break;
641 case MSG_ORDERED_TASK:
642 io->taskio.tag_type = CTL_TAG_ORDERED;
643 break;
644 case MSG_ACA_TASK:
645 io->taskio.tag_type = CTL_TAG_ACA;
646 break;
647 default:
648 io->taskio.tag_type = CTL_TAG_UNTAGGED;
649 printf("%s: unhandled tag type %#x!!\n", __func__,
650 abort_ccb->csio.tag_action);
651 break;
652 }
653 err = ctl_queue(io);
654 if (err != CTL_RETVAL_COMPLETE) {
655 printf("%s func %d: error %d returned by "
656 "ctl_queue()!\n", __func__,
657 ccb->ccb_h.func_code, err);
658 ctl_free_io(io);
659 }
660 break;
661 }
662 case XPT_GET_TRAN_SETTINGS: {
663 struct ccb_trans_settings *cts;
664 struct ccb_trans_settings_scsi *scsi;
665 struct ccb_trans_settings_fc *fc;
666
667 cts = &ccb->cts;
668 scsi = &cts->proto_specific.scsi;
669 fc = &cts->xport_specific.fc;
670
671
672 cts->protocol = PROTO_SCSI;
673 cts->protocol_version = SCSI_REV_SPC2;
674 cts->transport = XPORT_FC;
675 cts->transport_version = 0;
676
677 scsi->valid = CTS_SCSI_VALID_TQ;
678 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
679 fc->valid = CTS_FC_VALID_SPEED;
680 fc->bitrate = 800000;
681 fc->wwnn = softc->wwnn;
682 fc->wwpn = softc->wwpn;
683 fc->port = softc->port.targ_port;
684 fc->valid |= CTS_FC_VALID_WWNN | CTS_FC_VALID_WWPN |
685 CTS_FC_VALID_PORT;
686 ccb->ccb_h.status = CAM_REQ_CMP;
687 break;
688 }
689 case XPT_SET_TRAN_SETTINGS:
690 /* XXX KDM should we actually do something here? */
691 ccb->ccb_h.status = CAM_REQ_CMP;
692 break;
693 case XPT_RESET_BUS:
694 case XPT_RESET_DEV: {
695 union ctl_io *io;
696
697 /*
698 * If we aren't online, there are no devices to talk to.
699 */
700 if (softc->online == 0) {
701 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
702 xpt_done(ccb);
703 return;
704 }
705
706 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
707 if (io == NULL) {
708 ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
709 xpt_freeze_devq(ccb->ccb_h.path, 1);
710 xpt_done(ccb);
711 return;
712 }
713
714 ctl_zero_io(io);
715 /* Save pointers on both sides */
716 if (ccb->ccb_h.func_code == XPT_RESET_DEV)
717 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
718 ccb->ccb_h.io_ptr = io;
719
720 io->io_hdr.io_type = CTL_IO_TASK;
721 io->io_hdr.nexus.initid = 1;
722 io->io_hdr.nexus.targ_port = softc->port.targ_port;
723 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
724 CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
725 if (ccb->ccb_h.func_code == XPT_RESET_BUS)
726 io->taskio.task_action = CTL_TASK_BUS_RESET;
727 else
728 io->taskio.task_action = CTL_TASK_LUN_RESET;
729
730 err = ctl_queue(io);
731 if (err != CTL_RETVAL_COMPLETE) {
732 printf("%s func %d: error %d returned by "
733 "ctl_queue()!\n", __func__,
734 ccb->ccb_h.func_code, err);
735 ctl_free_io(io);
736 }
737 break;
738 }
739 case XPT_CALC_GEOMETRY:
740 cam_calc_geometry(&ccb->ccg, 1);
741 xpt_done(ccb);
742 break;
743 case XPT_PATH_INQ: {
744 struct ccb_pathinq *cpi;
745
746 cpi = &ccb->cpi;
747
748 cpi->version_num = 0;
749 cpi->hba_inquiry = PI_TAG_ABLE;
750 cpi->target_sprt = 0;
751 cpi->hba_misc = PIM_EXTLUNS;
752 cpi->hba_eng_cnt = 0;
753 cpi->max_target = 0;
754 cpi->max_lun = 1024;
755 /* Do we really have a limit? */
756 cpi->maxio = 1024 * 1024;
757 cpi->async_flags = 0;
758 cpi->hpath_id = 0;
759 cpi->initiator_id = 1;
760
761 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
762 strlcpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
763 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
764 cpi->unit_number = 0;
765 cpi->bus_id = 0;
766 cpi->base_transfer_speed = 800000;
767 cpi->protocol = PROTO_SCSI;
768 cpi->protocol_version = SCSI_REV_SPC2;
769 /*
770 * Pretend to be Fibre Channel.
771 */
772 cpi->transport = XPORT_FC;
773 cpi->transport_version = 0;
774 cpi->xport_specific.fc.wwnn = softc->wwnn;
775 cpi->xport_specific.fc.wwpn = softc->wwpn;
776 cpi->xport_specific.fc.port = softc->port.targ_port;
777 cpi->xport_specific.fc.bitrate = 8 * 1000 * 1000;
778 cpi->ccb_h.status = CAM_REQ_CMP;
779 break;
780 }
781 default:
782 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
783 printf("%s: unsupported CCB type %#x\n", __func__,
784 ccb->ccb_h.func_code);
785 xpt_done(ccb);
786 break;
787 }
788 }
789