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 <[email protected]>
39 */
40
41 #include <sys/cdefs.h>
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/types.h>
46 #include <sys/malloc.h>
47 #include <sys/bus.h>
48 #include <sys/sysctl.h>
49 #include <machine/atomic.h>
50 #include <machine/bus.h>
51 #include <sys/sbuf.h>
52
53 #include <cam/cam.h>
54 #include <cam/cam_ccb.h>
55 #include <cam/cam_sim.h>
56 #include <cam/cam_xpt_sim.h>
57 #include <cam/cam_xpt.h>
58 #include <cam/cam_periph.h>
59 #include <cam/scsi/scsi_all.h>
60 #include <cam/scsi/scsi_message.h>
61 #include <cam/ctl/ctl_io.h>
62 #include <cam/ctl/ctl.h>
63 #include <cam/ctl/ctl_frontend.h>
64 #include <cam/ctl/ctl_debug.h>
65
66 #define io_ptr spriv_ptr1
67
68 struct cfcs_io {
69 union ccb *ccb;
70 };
71
72 struct cfcs_softc {
73 struct ctl_port port;
74 char port_name[32];
75 struct cam_sim *sim;
76 struct cam_devq *devq;
77 struct cam_path *path;
78 uint64_t wwnn;
79 uint64_t wwpn;
80 uint32_t cur_tag_num;
81 int online;
82 };
83
84 /*
85 * We can't handle CCBs with these flags. For the most part, we just don't
86 * handle physical addresses yet. That would require mapping things in
87 * order to do the copy.
88 */
89 #define CFCS_BAD_CCB_FLAGS (CAM_DATA_ISPHYS | CAM_CDB_PHYS | CAM_SENSE_PTR | \
90 CAM_SENSE_PHYS)
91
92 static int cfcs_init(void);
93 static int cfcs_shutdown(void);
94 static void cfcs_poll(struct cam_sim *sim);
95 static void cfcs_online(void *arg);
96 static void cfcs_offline(void *arg);
97 static void cfcs_datamove(union ctl_io *io);
98 static void cfcs_done(union ctl_io *io);
99 void cfcs_action(struct cam_sim *sim, union ccb *ccb);
100
101 struct cfcs_softc cfcs_softc;
102 /*
103 * This is primarily intended to allow for error injection to test the CAM
104 * sense data and sense residual handling code. This sets the maximum
105 * amount of SCSI sense data that we will report to CAM.
106 */
107 static int cfcs_max_sense = sizeof(struct scsi_sense_data);
108
109 SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
110 "CAM Target Layer SIM frontend");
111 SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
112 &cfcs_max_sense, 0, "Maximum sense data size");
113
114 static struct ctl_frontend cfcs_frontend =
115 {
116 .name = "camsim",
117 .init = cfcs_init,
118 .shutdown = cfcs_shutdown,
119 };
120 CTL_FRONTEND_DECLARE(ctlcfcs, cfcs_frontend);
121
122 static int
cfcs_init(void)123 cfcs_init(void)
124 {
125 struct cfcs_softc *softc;
126 struct ctl_port *port;
127 int retval;
128
129 softc = &cfcs_softc;
130 bzero(softc, sizeof(*softc));
131 port = &softc->port;
132
133 port->frontend = &cfcs_frontend;
134 port->port_type = CTL_PORT_INTERNAL;
135 /* XXX KDM what should the real number be here? */
136 port->num_requested_ctl_io = 4096;
137 snprintf(softc->port_name, sizeof(softc->port_name), "camsim");
138 port->port_name = softc->port_name;
139 port->port_online = cfcs_online;
140 port->port_offline = cfcs_offline;
141 port->onoff_arg = softc;
142 port->fe_datamove = cfcs_datamove;
143 port->fe_done = cfcs_done;
144 port->targ_port = -1;
145
146 retval = ctl_port_register(port);
147 if (retval != 0) {
148 printf("%s: ctl_port_register() failed with error %d!\n",
149 __func__, retval);
150 return (retval);
151 }
152
153 /*
154 * If the CTL frontend didn't tell us what our WWNN/WWPN is, go
155 * ahead and set something random.
156 */
157 if (port->wwnn == 0) {
158 uint64_t random_bits;
159
160 arc4rand(&random_bits, sizeof(random_bits), 0);
161 softc->wwnn = (random_bits & 0x0000000fffffff00ULL) |
162 /* Company ID */ 0x5000000000000000ULL |
163 /* NL-Port */ 0x0300;
164 softc->wwpn = softc->wwnn + port->targ_port + 1;
165 ctl_port_set_wwns(port, true, softc->wwnn, true, softc->wwpn);
166 } else {
167 softc->wwnn = port->wwnn;
168 softc->wwpn = port->wwpn;
169 }
170
171 softc->devq = cam_simq_alloc(port->num_requested_ctl_io);
172 if (softc->devq == NULL) {
173 printf("%s: error allocating devq\n", __func__);
174 retval = ENOMEM;
175 goto bailout;
176 }
177
178 softc->sim = cam_sim_alloc(cfcs_action, cfcs_poll, softc->port_name,
179 softc, /*unit*/ 0, NULL, 1,
180 port->num_requested_ctl_io, softc->devq);
181 if (softc->sim == NULL) {
182 printf("%s: error allocating SIM\n", __func__);
183 retval = ENOMEM;
184 goto bailout;
185 }
186
187 if (xpt_bus_register(softc->sim, NULL, 0) != CAM_SUCCESS) {
188 printf("%s: error registering SIM\n", __func__);
189 retval = ENOMEM;
190 goto bailout;
191 }
192
193 if (xpt_create_path(&softc->path, /*periph*/NULL,
194 cam_sim_path(softc->sim),
195 CAM_TARGET_WILDCARD,
196 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
197 printf("%s: error creating path\n", __func__);
198 xpt_bus_deregister(cam_sim_path(softc->sim));
199 retval = EINVAL;
200 goto bailout;
201 }
202
203 return (retval);
204
205 bailout:
206 if (softc->sim)
207 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
208 else if (softc->devq)
209 cam_simq_free(softc->devq);
210 return (retval);
211 }
212
213 static int
cfcs_shutdown(void)214 cfcs_shutdown(void)
215 {
216 struct cfcs_softc *softc = &cfcs_softc;
217 struct ctl_port *port = &softc->port;
218 int error;
219
220 ctl_port_offline(port);
221
222 xpt_free_path(softc->path);
223 xpt_bus_deregister(cam_sim_path(softc->sim));
224 cam_sim_free(softc->sim, /*free_devq*/ TRUE);
225
226 if ((error = ctl_port_deregister(port)) != 0)
227 printf("%s: cam_sim port deregistration failed\n", __func__);
228 return (error);
229 }
230
231 static void
cfcs_poll(struct cam_sim * sim)232 cfcs_poll(struct cam_sim *sim)
233 {
234
235 }
236
237 static void
cfcs_onoffline(void * arg,int online)238 cfcs_onoffline(void *arg, int online)
239 {
240 struct cfcs_softc *softc = (struct cfcs_softc *)arg;
241 union ccb *ccb;
242
243 softc->online = online;
244
245 ccb = xpt_alloc_ccb_nowait();
246 if (ccb == NULL) {
247 printf("%s: unable to allocate CCB for rescan\n", __func__);
248 return;
249 }
250
251 if (xpt_create_path(&ccb->ccb_h.path, NULL,
252 cam_sim_path(softc->sim), CAM_TARGET_WILDCARD,
253 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
254 printf("%s: can't allocate path for rescan\n", __func__);
255 xpt_free_ccb(ccb);
256 return;
257 }
258 xpt_rescan(ccb);
259 }
260
261 static void
cfcs_online(void * arg)262 cfcs_online(void *arg)
263 {
264 cfcs_onoffline(arg, /*online*/ 1);
265 }
266
267 static void
cfcs_offline(void * arg)268 cfcs_offline(void *arg)
269 {
270 cfcs_onoffline(arg, /*online*/ 0);
271 }
272
273 /*
274 * This function is very similar to ctl_ioctl_do_datamove(). Is there a
275 * way to combine the functionality?
276 *
277 * XXX KDM may need to move this into a thread. We're doing a bcopy in the
278 * caller's context, which will usually be the backend. That may not be a
279 * good thing.
280 */
281 static void
cfcs_datamove(union ctl_io * io)282 cfcs_datamove(union ctl_io *io)
283 {
284 union ccb *ccb;
285 bus_dma_segment_t cam_sg_entry, *cam_sglist;
286 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
287 int cam_sg_count, ctl_sg_count, cam_sg_start;
288 int cam_sg_offset;
289 int len_to_copy;
290 int ctl_watermark, cam_watermark;
291 int i, j;
292
293 ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
294
295 /*
296 * Note that we have a check in cfcs_action() to make sure that any
297 * CCBs with "bad" flags are returned with CAM_REQ_INVALID. This
298 * is just to make sure no one removes that check without updating
299 * this code to provide the additional functionality necessary to
300 * support those modes of operation.
301 */
302 KASSERT(((ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) == 0), ("invalid "
303 "CAM flags %#x", (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS)));
304
305 /*
306 * Simplify things on both sides by putting single buffers into a
307 * single entry S/G list.
308 */
309 switch ((ccb->ccb_h.flags & CAM_DATA_MASK)) {
310 case CAM_DATA_SG: {
311 int len_seen;
312
313 cam_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr;
314 cam_sg_count = ccb->csio.sglist_cnt;
315 cam_sg_start = cam_sg_count;
316 cam_sg_offset = 0;
317
318 for (i = 0, len_seen = 0; i < cam_sg_count; i++) {
319 if ((len_seen + cam_sglist[i].ds_len) >=
320 io->scsiio.kern_rel_offset) {
321 cam_sg_start = i;
322 cam_sg_offset = io->scsiio.kern_rel_offset -
323 len_seen;
324 break;
325 }
326 len_seen += cam_sglist[i].ds_len;
327 }
328 break;
329 }
330 case CAM_DATA_VADDR:
331 cam_sglist = &cam_sg_entry;
332 cam_sglist[0].ds_len = ccb->csio.dxfer_len;
333 cam_sglist[0].ds_addr = (bus_addr_t)(uintptr_t)ccb->csio.data_ptr;
334 cam_sg_count = 1;
335 cam_sg_start = 0;
336 cam_sg_offset = io->scsiio.kern_rel_offset;
337 break;
338 default:
339 panic("Invalid CAM flags %#x", ccb->ccb_h.flags);
340 }
341
342 if (io->scsiio.kern_sg_entries > 0) {
343 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
344 ctl_sg_count = io->scsiio.kern_sg_entries;
345 } else {
346 ctl_sglist = &ctl_sg_entry;
347 ctl_sglist->addr = io->scsiio.kern_data_ptr;
348 ctl_sglist->len = io->scsiio.kern_data_len;
349 ctl_sg_count = 1;
350 }
351
352 ctl_watermark = 0;
353 cam_watermark = cam_sg_offset;
354 for (i = cam_sg_start, j = 0;
355 i < cam_sg_count && j < ctl_sg_count;) {
356 uint8_t *cam_ptr, *ctl_ptr;
357
358 len_to_copy = MIN(cam_sglist[i].ds_len - cam_watermark,
359 ctl_sglist[j].len - ctl_watermark);
360
361 cam_ptr = (uint8_t *)(uintptr_t)cam_sglist[i].ds_addr;
362 cam_ptr = cam_ptr + cam_watermark;
363 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
364 /*
365 * XXX KDM fix this!
366 */
367 panic("need to implement bus address support");
368 #if 0
369 kern_ptr = bus_to_virt(kern_sglist[j].addr);
370 #endif
371 } else
372 ctl_ptr = (uint8_t *)ctl_sglist[j].addr;
373 ctl_ptr = ctl_ptr + ctl_watermark;
374
375 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
376 CTL_FLAG_DATA_IN) {
377 CTL_DEBUG_PRINT(("%s: copying %d bytes to CAM\n",
378 __func__, len_to_copy));
379 CTL_DEBUG_PRINT(("%s: from %p to %p\n", ctl_ptr,
380 __func__, cam_ptr));
381 bcopy(ctl_ptr, cam_ptr, len_to_copy);
382 } else {
383 CTL_DEBUG_PRINT(("%s: copying %d bytes from CAM\n",
384 __func__, len_to_copy));
385 CTL_DEBUG_PRINT(("%s: from %p to %p\n", cam_ptr,
386 __func__, ctl_ptr));
387 bcopy(cam_ptr, ctl_ptr, len_to_copy);
388 }
389
390 io->scsiio.ext_data_filled += len_to_copy;
391 io->scsiio.kern_data_resid -= len_to_copy;
392
393 cam_watermark += len_to_copy;
394 if (cam_sglist[i].ds_len == cam_watermark) {
395 i++;
396 cam_watermark = 0;
397 }
398
399 ctl_watermark += len_to_copy;
400 if (ctl_sglist[j].len == ctl_watermark) {
401 j++;
402 ctl_watermark = 0;
403 }
404 }
405
406 if ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS) {
407 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL;
408 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT;
409 ccb->csio.resid = ccb->csio.dxfer_len -
410 io->scsiio.ext_data_filled;
411 ccb->ccb_h.status &= ~CAM_STATUS_MASK;
412 ccb->ccb_h.status |= CAM_REQ_CMP;
413 xpt_done(ccb);
414 }
415
416 ctl_datamove_done(io, true);
417 }
418
419 static void
cfcs_done(union ctl_io * io)420 cfcs_done(union ctl_io *io)
421 {
422 union ccb *ccb;
423
424 ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
425 if (ccb == NULL) {
426 ctl_free_io(io);
427 return;
428 }
429
430 /*
431 * At this point we should have status. If we don't, that's a bug.
432 */
433 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
434 ("invalid CTL status %#x", io->io_hdr.status));
435
436 /*
437 * Translate CTL status to CAM status.
438 */
439 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
440 ccb->csio.resid = ccb->csio.dxfer_len -
441 io->scsiio.ext_data_filled;
442 }
443 ccb->ccb_h.status &= ~CAM_STATUS_MASK;
444 switch (io->io_hdr.status & CTL_STATUS_MASK) {
445 case CTL_SUCCESS:
446 ccb->ccb_h.status |= CAM_REQ_CMP;
447 break;
448 case CTL_SCSI_ERROR:
449 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
450 ccb->csio.scsi_status = io->scsiio.scsi_status;
451 bcopy(&io->scsiio.sense_data, &ccb->csio.sense_data,
452 min(io->scsiio.sense_len, ccb->csio.sense_len));
453 if (ccb->csio.sense_len > io->scsiio.sense_len)
454 ccb->csio.sense_resid = ccb->csio.sense_len -
455 io->scsiio.sense_len;
456 else
457 ccb->csio.sense_resid = 0;
458 if ((ccb->csio.sense_len - ccb->csio.sense_resid) >
459 cfcs_max_sense) {
460 ccb->csio.sense_resid = ccb->csio.sense_len -
461 cfcs_max_sense;
462 }
463 break;
464 case CTL_CMD_ABORTED:
465 ccb->ccb_h.status |= CAM_REQ_ABORTED;
466 break;
467 case CTL_ERROR:
468 default:
469 ccb->ccb_h.status |= CAM_REQ_CMP_ERR;
470 break;
471 }
472 ctl_free_io(io);
473 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP &&
474 (ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
475 xpt_freeze_devq(ccb->ccb_h.path, 1);
476 ccb->ccb_h.status |= CAM_DEV_QFRZN;
477 }
478 xpt_done(ccb);
479 }
480
481 void
cfcs_action(struct cam_sim * sim,union ccb * ccb)482 cfcs_action(struct cam_sim *sim, union ccb *ccb)
483 {
484 struct cfcs_softc *softc;
485 int err;
486
487 softc = (struct cfcs_softc *)cam_sim_softc(sim);
488
489 switch (ccb->ccb_h.func_code) {
490 case XPT_SCSI_IO: {
491 union ctl_io *io;
492 struct ccb_scsiio *csio;
493
494 csio = &ccb->csio;
495
496 /*
497 * Catch CCB flags, like physical address flags, that
498 * indicate situations we currently can't handle.
499 */
500 if (ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS) {
501 ccb->ccb_h.status = CAM_REQ_INVALID;
502 printf("%s: bad CCB flags %#x (all flags %#x)\n",
503 __func__, ccb->ccb_h.flags & CFCS_BAD_CCB_FLAGS,
504 ccb->ccb_h.flags);
505 xpt_done(ccb);
506 return;
507 }
508
509 /*
510 * If we aren't online, there are no devices to see.
511 */
512 if (softc->online == 0) {
513 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
514 xpt_done(ccb);
515 return;
516 }
517
518 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
519 if (io == NULL) {
520 printf("%s: can't allocate ctl_io\n", __func__);
521 ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
522 xpt_freeze_devq(ccb->ccb_h.path, 1);
523 xpt_done(ccb);
524 return;
525 }
526 ctl_zero_io(io);
527 /* Save pointers on both sides */
528 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
529 ccb->ccb_h.io_ptr = io;
530
531 /*
532 * Only SCSI I/O comes down this path, resets, etc. come
533 * down via the XPT_RESET_BUS/LUN CCBs below.
534 */
535 io->io_hdr.io_type = CTL_IO_SCSI;
536 io->io_hdr.nexus.initid = 1;
537 io->io_hdr.nexus.targ_port = softc->port.targ_port;
538 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
539 CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
540 io->scsiio.priority = csio->priority;
541 /*
542 * This tag scheme isn't the best, since we could in theory
543 * have a very long-lived I/O and tag collision, especially
544 * in a high I/O environment. But it should work well
545 * enough for now. Since we're using unsigned ints,
546 * they'll just wrap around.
547 */
548 io->scsiio.tag_num = atomic_fetchadd_32(&softc->cur_tag_num, 1);
549 csio->tag_id = io->scsiio.tag_num;
550 switch (csio->tag_action) {
551 case CAM_TAG_ACTION_NONE:
552 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
553 break;
554 case MSG_SIMPLE_TASK:
555 io->scsiio.tag_type = CTL_TAG_SIMPLE;
556 break;
557 case MSG_HEAD_OF_QUEUE_TASK:
558 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
559 break;
560 case MSG_ORDERED_TASK:
561 io->scsiio.tag_type = CTL_TAG_ORDERED;
562 break;
563 case MSG_ACA_TASK:
564 io->scsiio.tag_type = CTL_TAG_ACA;
565 break;
566 default:
567 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
568 printf("%s: unhandled tag type %#x!!\n", __func__,
569 csio->tag_action);
570 break;
571 }
572 if (csio->cdb_len > sizeof(io->scsiio.cdb)) {
573 printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
574 __func__, csio->cdb_len, sizeof(io->scsiio.cdb));
575 }
576 io->scsiio.cdb_len = min(csio->cdb_len, sizeof(io->scsiio.cdb));
577 bcopy(scsiio_cdb_ptr(csio), io->scsiio.cdb, io->scsiio.cdb_len);
578
579 ccb->ccb_h.status |= CAM_SIM_QUEUED;
580 err = ctl_queue(io);
581 if (err != CTL_RETVAL_COMPLETE) {
582 printf("%s: func %d: error %d returned by "
583 "ctl_queue()!\n", __func__,
584 ccb->ccb_h.func_code, err);
585 ctl_free_io(io);
586 ccb->ccb_h.status = CAM_REQ_INVALID;
587 xpt_done(ccb);
588 return;
589 }
590 break;
591 }
592 case XPT_ABORT: {
593 union ctl_io *io;
594 union ccb *abort_ccb;
595
596 abort_ccb = ccb->cab.abort_ccb;
597
598 if (abort_ccb->ccb_h.func_code != XPT_SCSI_IO) {
599 ccb->ccb_h.status = CAM_REQ_INVALID;
600 xpt_done(ccb);
601 }
602
603 /*
604 * If we aren't online, there are no devices to talk to.
605 */
606 if (softc->online == 0) {
607 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
608 xpt_done(ccb);
609 return;
610 }
611
612 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
613 if (io == NULL) {
614 ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
615 xpt_freeze_devq(ccb->ccb_h.path, 1);
616 xpt_done(ccb);
617 return;
618 }
619
620 ctl_zero_io(io);
621 /* Save pointers on both sides */
622 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
623 ccb->ccb_h.io_ptr = io;
624
625 io->io_hdr.io_type = CTL_IO_TASK;
626 io->io_hdr.nexus.initid = 1;
627 io->io_hdr.nexus.targ_port = softc->port.targ_port;
628 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
629 CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
630 io->taskio.task_action = CTL_TASK_ABORT_TASK;
631 io->taskio.tag_num = abort_ccb->csio.tag_id;
632 switch (abort_ccb->csio.tag_action) {
633 case CAM_TAG_ACTION_NONE:
634 io->taskio.tag_type = CTL_TAG_UNTAGGED;
635 break;
636 case MSG_SIMPLE_TASK:
637 io->taskio.tag_type = CTL_TAG_SIMPLE;
638 break;
639 case MSG_HEAD_OF_QUEUE_TASK:
640 io->taskio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
641 break;
642 case MSG_ORDERED_TASK:
643 io->taskio.tag_type = CTL_TAG_ORDERED;
644 break;
645 case MSG_ACA_TASK:
646 io->taskio.tag_type = CTL_TAG_ACA;
647 break;
648 default:
649 io->taskio.tag_type = CTL_TAG_UNTAGGED;
650 printf("%s: unhandled tag type %#x!!\n", __func__,
651 abort_ccb->csio.tag_action);
652 break;
653 }
654 err = ctl_queue(io);
655 if (err != CTL_RETVAL_COMPLETE) {
656 printf("%s func %d: error %d returned by "
657 "ctl_queue()!\n", __func__,
658 ccb->ccb_h.func_code, err);
659 ctl_free_io(io);
660 }
661 break;
662 }
663 case XPT_GET_TRAN_SETTINGS: {
664 struct ccb_trans_settings *cts;
665 struct ccb_trans_settings_scsi *scsi;
666 struct ccb_trans_settings_fc *fc;
667
668 cts = &ccb->cts;
669 scsi = &cts->proto_specific.scsi;
670 fc = &cts->xport_specific.fc;
671
672
673 cts->protocol = PROTO_SCSI;
674 cts->protocol_version = SCSI_REV_SPC2;
675 cts->transport = XPORT_FC;
676 cts->transport_version = 0;
677
678 scsi->valid = CTS_SCSI_VALID_TQ;
679 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
680 fc->valid = CTS_FC_VALID_SPEED;
681 fc->bitrate = 800000;
682 fc->wwnn = softc->wwnn;
683 fc->wwpn = softc->wwpn;
684 fc->port = softc->port.targ_port;
685 fc->valid |= CTS_FC_VALID_WWNN | CTS_FC_VALID_WWPN |
686 CTS_FC_VALID_PORT;
687 ccb->ccb_h.status = CAM_REQ_CMP;
688 break;
689 }
690 case XPT_SET_TRAN_SETTINGS:
691 /* XXX KDM should we actually do something here? */
692 ccb->ccb_h.status = CAM_REQ_CMP;
693 break;
694 case XPT_RESET_BUS:
695 case XPT_RESET_DEV: {
696 union ctl_io *io;
697
698 /*
699 * If we aren't online, there are no devices to talk to.
700 */
701 if (softc->online == 0) {
702 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
703 xpt_done(ccb);
704 return;
705 }
706
707 io = ctl_alloc_io_nowait(softc->port.ctl_pool_ref);
708 if (io == NULL) {
709 ccb->ccb_h.status = CAM_BUSY | CAM_DEV_QFRZN;
710 xpt_freeze_devq(ccb->ccb_h.path, 1);
711 xpt_done(ccb);
712 return;
713 }
714
715 ctl_zero_io(io);
716 /* Save pointers on both sides */
717 if (ccb->ccb_h.func_code == XPT_RESET_DEV)
718 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = ccb;
719 ccb->ccb_h.io_ptr = io;
720
721 io->io_hdr.io_type = CTL_IO_TASK;
722 io->io_hdr.nexus.initid = 1;
723 io->io_hdr.nexus.targ_port = softc->port.targ_port;
724 io->io_hdr.nexus.targ_lun = ctl_decode_lun(
725 CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
726 if (ccb->ccb_h.func_code == XPT_RESET_BUS)
727 io->taskio.task_action = CTL_TASK_BUS_RESET;
728 else
729 io->taskio.task_action = CTL_TASK_LUN_RESET;
730
731 err = ctl_queue(io);
732 if (err != CTL_RETVAL_COMPLETE) {
733 printf("%s func %d: error %d returned by "
734 "ctl_queue()!\n", __func__,
735 ccb->ccb_h.func_code, err);
736 ctl_free_io(io);
737 }
738 break;
739 }
740 case XPT_CALC_GEOMETRY:
741 cam_calc_geometry(&ccb->ccg, 1);
742 xpt_done(ccb);
743 break;
744 case XPT_PATH_INQ: {
745 struct ccb_pathinq *cpi;
746
747 cpi = &ccb->cpi;
748
749 cpi->version_num = 0;
750 cpi->hba_inquiry = PI_TAG_ABLE;
751 cpi->target_sprt = 0;
752 cpi->hba_misc = PIM_EXTLUNS;
753 cpi->hba_eng_cnt = 0;
754 cpi->max_target = 0;
755 cpi->max_lun = 1024;
756 /* Do we really have a limit? */
757 cpi->maxio = 1024 * 1024;
758 cpi->async_flags = 0;
759 cpi->hpath_id = 0;
760 cpi->initiator_id = 1;
761
762 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
763 strlcpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
764 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
765 cpi->unit_number = 0;
766 cpi->bus_id = 0;
767 cpi->base_transfer_speed = 800000;
768 cpi->protocol = PROTO_SCSI;
769 cpi->protocol_version = SCSI_REV_SPC2;
770 /*
771 * Pretend to be Fibre Channel.
772 */
773 cpi->transport = XPORT_FC;
774 cpi->transport_version = 0;
775 cpi->xport_specific.fc.wwnn = softc->wwnn;
776 cpi->xport_specific.fc.wwpn = softc->wwpn;
777 cpi->xport_specific.fc.port = softc->port.targ_port;
778 cpi->xport_specific.fc.bitrate = 8 * 1000 * 1000;
779 cpi->ccb_h.status = CAM_REQ_CMP;
780 break;
781 }
782 default:
783 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
784 printf("%s: unsupported CCB type %#x\n", __func__,
785 ccb->ccb_h.func_code);
786 xpt_done(ccb);
787 break;
788 }
789 }
790