2 * Disk Array driver for HP Smart Array controllers, SCSI Tape module.
3 * (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
21 * Author: Stephen M. Cameron
23 #ifdef CONFIG_CISS_SCSI_TAPE
25 /* Here we have code to present the driver as a scsi driver
26 as it is simultaneously presented as a block driver. The
27 reason for doing this is to allow access to SCSI tape drives
28 through the array controller. Note in particular, neither
29 physical nor logical disks are presented through the scsi layer. */
31 #include <linux/timer.h>
32 #include <linux/completion.h>
33 #include <linux/slab.h>
34 #include <linux/string.h>
36 #include <asm/atomic.h>
38 #include <scsi/scsi_cmnd.h>
39 #include <scsi/scsi_device.h>
40 #include <scsi/scsi_host.h>
42 #include "cciss_scsi.h"
44 #define CCISS_ABORT_MSG 0x00
45 #define CCISS_RESET_MSG 0x01
47 static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
49 __u8 page_code, unsigned char *scsi3addr,
52 static CommandList_struct *cmd_alloc(ctlr_info_t *h);
53 static CommandList_struct *cmd_special_alloc(ctlr_info_t *h);
54 static void cmd_free(ctlr_info_t *h, CommandList_struct *c);
55 static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c);
57 static int cciss_scsi_proc_info(
59 char *buffer, /* data buffer */
60 char **start, /* where data in buffer starts */
61 off_t offset, /* offset from start of imaginary file */
62 int length, /* length of data in buffer */
63 int func); /* 0 == read, 1 == write */
65 static int cciss_scsi_queue_command (struct scsi_cmnd *cmd,
66 void (* done)(struct scsi_cmnd *));
67 static int cciss_eh_device_reset_handler(struct scsi_cmnd *);
68 static int cciss_eh_abort_handler(struct scsi_cmnd *);
70 static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = {
71 { .name = "cciss0", .ndevices = 0 },
72 { .name = "cciss1", .ndevices = 0 },
73 { .name = "cciss2", .ndevices = 0 },
74 { .name = "cciss3", .ndevices = 0 },
75 { .name = "cciss4", .ndevices = 0 },
76 { .name = "cciss5", .ndevices = 0 },
77 { .name = "cciss6", .ndevices = 0 },
78 { .name = "cciss7", .ndevices = 0 },
81 static struct scsi_host_template cciss_driver_template = {
82 .module = THIS_MODULE,
85 .proc_info = cciss_scsi_proc_info,
86 .queuecommand = cciss_scsi_queue_command,
87 .can_queue = SCSI_CCISS_CAN_QUEUE,
90 .use_clustering = DISABLE_CLUSTERING,
91 /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */
92 .eh_device_reset_handler= cciss_eh_device_reset_handler,
93 .eh_abort_handler = cciss_eh_abort_handler,
101 struct cciss_scsi_cmd_stack_elem_t {
102 CommandList_struct cmd;
103 ErrorInfo_struct Err;
106 u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64];
111 #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \
112 CCISS_MAX_SCSI_DEVS_PER_HBA + 2)
113 // plus two for init time usage
116 struct cciss_scsi_cmd_stack_t {
117 struct cciss_scsi_cmd_stack_elem_t *pool;
118 struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE];
119 dma_addr_t cmd_pool_handle;
124 struct cciss_scsi_adapter_data_t {
125 struct Scsi_Host *scsi_host;
126 struct cciss_scsi_cmd_stack_t cmd_stack;
127 SGDescriptor_struct **cmd_sg_list;
129 spinlock_t lock; // to protect ccissscsi[ctlr];
132 #define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \
133 &h->scsi_ctlr->lock, flags);
134 #define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \
135 &h->scsi_ctlr->lock, flags);
137 static CommandList_struct *
138 scsi_cmd_alloc(ctlr_info_t *h)
140 /* assume only one process in here at a time, locking done by caller. */
142 /* might be better to rewrite how we allocate scsi commands in a way that */
143 /* needs no locking at all. */
145 /* take the top memory chunk off the stack and return it, if any. */
146 struct cciss_scsi_cmd_stack_elem_t *c;
147 struct cciss_scsi_adapter_data_t *sa;
148 struct cciss_scsi_cmd_stack_t *stk;
152 stk = &sa->cmd_stack;
156 c = stk->elem[stk->top];
157 /* memset(c, 0, sizeof(*c)); */
158 memset(&c->cmd, 0, sizeof(c->cmd));
159 memset(&c->Err, 0, sizeof(c->Err));
160 /* set physical addr of cmd and addr of scsi parameters */
161 c->cmd.busaddr = c->busaddr;
162 c->cmd.cmdindex = c->cmdindex;
163 /* (__u32) (stk->cmd_pool_handle +
164 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */
166 temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct));
167 /* (__u64) (stk->cmd_pool_handle +
168 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) +
169 sizeof(CommandList_struct)); */
171 c->cmd.ErrDesc.Addr.lower = temp64.val32.lower;
172 c->cmd.ErrDesc.Addr.upper = temp64.val32.upper;
173 c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct);
175 c->cmd.ctlr = h->ctlr;
176 c->cmd.err_info = &c->Err;
178 return (CommandList_struct *) c;
182 scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c)
184 /* assume only one process in here at a time, locking done by caller. */
186 /* drop the free memory chunk on top of the stack. */
188 struct cciss_scsi_adapter_data_t *sa;
189 struct cciss_scsi_cmd_stack_t *stk;
192 stk = &sa->cmd_stack;
194 if (stk->top >= CMD_STACK_SIZE) {
195 printk("cciss: scsi_cmd_free called too many times.\n");
198 stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c;
202 scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
205 struct cciss_scsi_cmd_stack_t *stk;
208 sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
209 h->chainsize, CMD_STACK_SIZE);
210 if (!sa->cmd_sg_list && h->chainsize > 0)
213 stk = &sa->cmd_stack;
214 size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
216 /* Check alignment, see cciss_cmd.h near CommandList_struct def. */
217 BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
218 /* pci_alloc_consistent guarantees 32-bit DMA address will be used */
219 stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
220 pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle);
222 if (stk->pool == NULL) {
223 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
224 sa->cmd_sg_list = NULL;
228 for (i=0; i<CMD_STACK_SIZE; i++) {
229 stk->elem[i] = &stk->pool[i];
230 stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle +
231 (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
232 stk->elem[i]->cmdindex = i;
234 stk->top = CMD_STACK_SIZE-1;
239 scsi_cmd_stack_free(ctlr_info_t *h)
241 struct cciss_scsi_adapter_data_t *sa;
242 struct cciss_scsi_cmd_stack_t *stk;
246 stk = &sa->cmd_stack;
247 if (stk->top != CMD_STACK_SIZE-1) {
248 printk( "cciss: %d scsi commands are still outstanding.\n",
249 CMD_STACK_SIZE - stk->top);
251 printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk);
253 size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
255 pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle);
257 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
261 static int xmargin=8;
262 static int amargin=60;
265 print_bytes (unsigned char *c, int len, int hex, int ascii)
276 if ((i % xmargin) == 0 && i>0) printk("\n");
277 if ((i % xmargin) == 0) printk("0x%04x:", i);
288 if ((i % amargin) == 0 && i>0) printk("\n");
289 if ((i % amargin) == 0) printk("0x%04x:", i);
290 if (*x > 26 && *x < 128) printk("%c", *x);
299 print_cmd(CommandList_struct *cp)
301 printk("queue:%d\n", cp->Header.ReplyQueue);
302 printk("sglist:%d\n", cp->Header.SGList);
303 printk("sgtot:%d\n", cp->Header.SGTotal);
304 printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper,
305 cp->Header.Tag.lower);
306 printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
307 cp->Header.LUN.LunAddrBytes[0],
308 cp->Header.LUN.LunAddrBytes[1],
309 cp->Header.LUN.LunAddrBytes[2],
310 cp->Header.LUN.LunAddrBytes[3],
311 cp->Header.LUN.LunAddrBytes[4],
312 cp->Header.LUN.LunAddrBytes[5],
313 cp->Header.LUN.LunAddrBytes[6],
314 cp->Header.LUN.LunAddrBytes[7]);
315 printk("CDBLen:%d\n", cp->Request.CDBLen);
316 printk("Type:%d\n",cp->Request.Type.Type);
317 printk("Attr:%d\n",cp->Request.Type.Attribute);
318 printk(" Dir:%d\n",cp->Request.Type.Direction);
319 printk("Timeout:%d\n",cp->Request.Timeout);
320 printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x"
321 " %02x %02x %02x %02x %02x %02x %02x %02x\n",
322 cp->Request.CDB[0], cp->Request.CDB[1],
323 cp->Request.CDB[2], cp->Request.CDB[3],
324 cp->Request.CDB[4], cp->Request.CDB[5],
325 cp->Request.CDB[6], cp->Request.CDB[7],
326 cp->Request.CDB[8], cp->Request.CDB[9],
327 cp->Request.CDB[10], cp->Request.CDB[11],
328 cp->Request.CDB[12], cp->Request.CDB[13],
329 cp->Request.CDB[14], cp->Request.CDB[15]),
330 printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n",
331 cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower,
333 printk("sgs..........Errorinfo:\n");
334 printk("scsistatus:%d\n", cp->err_info->ScsiStatus);
335 printk("senselen:%d\n", cp->err_info->SenseLen);
336 printk("cmd status:%d\n", cp->err_info->CommandStatus);
337 printk("resid cnt:%d\n", cp->err_info->ResidualCnt);
338 printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size);
339 printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num);
340 printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
347 find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun)
349 /* finds an unused bus, target, lun for a new device */
350 /* assumes h->scsi_ctlr->lock is held */
352 unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA];
354 memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA);
356 target_taken[SELF_SCSI_ID] = 1;
357 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++)
358 target_taken[ccissscsi[h->ctlr].dev[i].target] = 1;
360 for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) {
361 if (!target_taken[i]) {
362 *bus = 0; *target=i; *lun = 0; found=1;
370 int bus, target, lun;
374 cciss_scsi_add_entry(ctlr_info_t *h, int hostno,
375 struct cciss_scsi_dev_t *device,
376 struct scsi2map *added, int *nadded)
378 /* assumes h->scsi_ctlr->lock is held */
379 int n = ccissscsi[h->ctlr].ndevices;
380 struct cciss_scsi_dev_t *sd;
381 int i, bus, target, lun;
382 unsigned char addr1[8], addr2[8];
384 if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
385 printk("cciss%d: Too many devices, "
386 "some will be inaccessible.\n", h->ctlr);
392 /* Is this device a non-zero lun of a multi-lun device */
393 /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */
394 if (device->scsi3addr[4] != 0) {
395 /* Search through our list and find the device which */
396 /* has the same 8 byte LUN address, excepting byte 4. */
397 /* Assign the same bus and target for this new LUN. */
398 /* Use the logical unit number from the firmware. */
399 memcpy(addr1, device->scsi3addr, 8);
401 for (i = 0; i < n; i++) {
402 sd = &ccissscsi[h->ctlr].dev[i];
403 memcpy(addr2, sd->scsi3addr, 8);
405 /* differ only in byte 4? */
406 if (memcmp(addr1, addr2, 8) == 0) {
409 lun = device->scsi3addr[4];
415 sd = &ccissscsi[h->ctlr].dev[n];
417 if (find_bus_target_lun(h,
418 &sd->bus, &sd->target, &sd->lun) != 0)
425 added[*nadded].bus = sd->bus;
426 added[*nadded].target = sd->target;
427 added[*nadded].lun = sd->lun;
430 memcpy(sd->scsi3addr, device->scsi3addr, 8);
431 memcpy(sd->vendor, device->vendor, sizeof(sd->vendor));
432 memcpy(sd->revision, device->revision, sizeof(sd->revision));
433 memcpy(sd->device_id, device->device_id, sizeof(sd->device_id));
434 sd->devtype = device->devtype;
436 ccissscsi[h->ctlr].ndevices++;
438 /* initially, (before registering with scsi layer) we don't
439 know our hostno and we don't want to print anything first
440 time anyway (the scsi layer's inquiries will show that info) */
442 printk("cciss%d: %s device c%db%dt%dl%d added.\n",
443 h->ctlr, scsi_device_type(sd->devtype), hostno,
444 sd->bus, sd->target, sd->lun);
449 cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry,
450 struct scsi2map *removed, int *nremoved)
452 /* assumes h->ctlr]->scsi_ctlr->lock is held */
454 struct cciss_scsi_dev_t sd;
456 if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return;
457 sd = ccissscsi[h->ctlr].dev[entry];
458 removed[*nremoved].bus = sd.bus;
459 removed[*nremoved].target = sd.target;
460 removed[*nremoved].lun = sd.lun;
462 for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++)
463 ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1];
464 ccissscsi[h->ctlr].ndevices--;
465 printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
466 h->ctlr, scsi_device_type(sd.devtype), hostno,
467 sd.bus, sd.target, sd.lun);
471 #define SCSI3ADDR_EQ(a,b) ( \
472 (a)[7] == (b)[7] && \
473 (a)[6] == (b)[6] && \
474 (a)[5] == (b)[5] && \
475 (a)[4] == (b)[4] && \
476 (a)[3] == (b)[3] && \
477 (a)[2] == (b)[2] && \
478 (a)[1] == (b)[1] && \
481 static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr)
483 /* called when scsi_add_device fails in order to re-adjust */
484 /* ccissscsi[] to match the mid layer's view. */
487 CPQ_TAPE_LOCK(h, flags);
488 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
489 if (memcmp(scsi3addr,
490 ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) {
491 for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++)
492 ccissscsi[h->ctlr].dev[j] =
493 ccissscsi[h->ctlr].dev[j+1];
494 ccissscsi[h->ctlr].ndevices--;
498 CPQ_TAPE_UNLOCK(h, flags);
501 static int device_is_the_same(struct cciss_scsi_dev_t *dev1,
502 struct cciss_scsi_dev_t *dev2)
504 return dev1->devtype == dev2->devtype &&
505 memcmp(dev1->scsi3addr, dev2->scsi3addr,
506 sizeof(dev1->scsi3addr)) == 0 &&
507 memcmp(dev1->device_id, dev2->device_id,
508 sizeof(dev1->device_id)) == 0 &&
509 memcmp(dev1->vendor, dev2->vendor,
510 sizeof(dev1->vendor)) == 0 &&
511 memcmp(dev1->model, dev2->model,
512 sizeof(dev1->model)) == 0 &&
513 memcmp(dev1->revision, dev2->revision,
514 sizeof(dev1->revision)) == 0;
518 adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
519 struct cciss_scsi_dev_t sd[], int nsds)
521 /* sd contains scsi3 addresses and devtypes, but
522 bus target and lun are not filled in. This funciton
523 takes what's in sd to be the current and adjusts
524 ccissscsi[] to be in line with what's in sd. */
526 int i,j, found, changes=0;
527 struct cciss_scsi_dev_t *csd;
529 struct scsi2map *added, *removed;
530 int nadded, nremoved;
531 struct Scsi_Host *sh = NULL;
533 added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA,
535 removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA,
538 if (!added || !removed) {
539 printk(KERN_WARNING "cciss%d: Out of memory in "
540 "adjust_cciss_scsi_table\n", h->ctlr);
544 CPQ_TAPE_LOCK(h, flags);
546 if (hostno != -1) /* if it's not the first time... */
547 sh = h->scsi_ctlr->scsi_host;
549 /* find any devices in ccissscsi[] that are not in
550 sd[] and remove them from ccissscsi[] */
555 while (i < ccissscsi[h->ctlr].ndevices) {
556 csd = &ccissscsi[h->ctlr].dev[i];
558 for (j=0;j<nsds;j++) {
559 if (SCSI3ADDR_EQ(sd[j].scsi3addr,
561 if (device_is_the_same(&sd[j], csd))
569 if (found == 0) { /* device no longer present. */
571 /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
572 h->ctlr, scsi_device_type(csd->devtype), hostno,
573 csd->bus, csd->target, csd->lun); */
574 cciss_scsi_remove_entry(h, hostno, i,
576 /* remove ^^^, hence i not incremented */
577 } else if (found == 1) { /* device is different in some way */
579 printk("cciss%d: device c%db%dt%dl%d has changed.\n",
581 csd->bus, csd->target, csd->lun);
582 cciss_scsi_remove_entry(h, hostno, i,
584 /* remove ^^^, hence i not incremented */
585 if (cciss_scsi_add_entry(h, hostno, &sd[j],
586 added, &nadded) != 0)
587 /* we just removed one, so add can't fail. */
589 csd->devtype = sd[j].devtype;
590 memcpy(csd->device_id, sd[j].device_id,
591 sizeof(csd->device_id));
592 memcpy(csd->vendor, sd[j].vendor,
593 sizeof(csd->vendor));
594 memcpy(csd->model, sd[j].model,
596 memcpy(csd->revision, sd[j].revision,
597 sizeof(csd->revision));
598 } else /* device is same as it ever was, */
599 i++; /* so just move along. */
602 /* Now, make sure every device listed in sd[] is also
603 listed in ccissscsi[], adding them if they aren't found */
605 for (i=0;i<nsds;i++) {
607 for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) {
608 csd = &ccissscsi[h->ctlr].dev[j];
609 if (SCSI3ADDR_EQ(sd[i].scsi3addr,
611 if (device_is_the_same(&sd[i], csd))
612 found=2; /* found device */
614 found=1; /* found a bug. */
620 if (cciss_scsi_add_entry(h, hostno, &sd[i],
621 added, &nadded) != 0)
623 } else if (found == 1) {
624 /* should never happen... */
626 printk(KERN_WARNING "cciss%d: device "
627 "unexpectedly changed\n", h->ctlr);
628 /* but if it does happen, we just ignore that device */
631 CPQ_TAPE_UNLOCK(h, flags);
633 /* Don't notify scsi mid layer of any changes the first time through */
634 /* (or if there are no changes) scsi_scan_host will do it later the */
635 /* first time through. */
636 if (hostno == -1 || !changes)
639 /* Notify scsi mid layer of any removed devices */
640 for (i = 0; i < nremoved; i++) {
641 struct scsi_device *sdev =
642 scsi_device_lookup(sh, removed[i].bus,
643 removed[i].target, removed[i].lun);
645 scsi_remove_device(sdev);
646 scsi_device_put(sdev);
648 /* We don't expect to get here. */
649 /* future cmds to this device will get selection */
650 /* timeout as if the device was gone. */
651 printk(KERN_WARNING "cciss%d: didn't find "
652 "c%db%dt%dl%d\n for removal.",
653 h->ctlr, hostno, removed[i].bus,
654 removed[i].target, removed[i].lun);
658 /* Notify scsi mid layer of any added devices */
659 for (i = 0; i < nadded; i++) {
661 rc = scsi_add_device(sh, added[i].bus,
662 added[i].target, added[i].lun);
665 printk(KERN_WARNING "cciss%d: scsi_add_device "
666 "c%db%dt%dl%d failed, device not added.\n",
668 added[i].bus, added[i].target, added[i].lun);
669 /* now we have to remove it from ccissscsi, */
670 /* since it didn't get added to scsi mid layer */
671 fixup_botched_add(h, added[i].scsi3addr);
681 lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr)
684 struct cciss_scsi_dev_t *sd;
687 CPQ_TAPE_LOCK(h, flags);
688 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
689 sd = &ccissscsi[h->ctlr].dev[i];
690 if (sd->bus == bus &&
691 sd->target == target &&
693 memcpy(scsi3addr, &sd->scsi3addr[0], 8);
694 CPQ_TAPE_UNLOCK(h, flags);
698 CPQ_TAPE_UNLOCK(h, flags);
703 cciss_scsi_setup(ctlr_info_t *h)
705 struct cciss_scsi_adapter_data_t * shba;
707 ccissscsi[h->ctlr].ndevices = 0;
708 shba = (struct cciss_scsi_adapter_data_t *)
709 kmalloc(sizeof(*shba), GFP_KERNEL);
712 shba->scsi_host = NULL;
713 spin_lock_init(&shba->lock);
714 shba->registered = 0;
715 if (scsi_cmd_stack_setup(h, shba) != 0) {
723 static void complete_scsi_command(CommandList_struct *c, int timeout,
726 struct scsi_cmnd *cmd;
728 ErrorInfo_struct *ei;
732 /* First, see if it was a message rather than a command */
733 if (c->Request.Type.Type == TYPE_MSG) {
734 c->cmd_type = CMD_MSG_DONE;
738 cmd = (struct scsi_cmnd *) c->scsi_cmd;
742 if (c->Header.SGTotal > h->max_cmd_sgentries)
743 cciss_unmap_sg_chain_block(h, c);
745 cmd->result = (DID_OK << 16); /* host byte */
746 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
747 /* cmd->result |= (GOOD < 1); */ /* status byte */
749 cmd->result |= (ei->ScsiStatus);
750 /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */
752 /* copy the sense data whether we need to or not. */
754 memcpy(cmd->sense_buffer, ei->SenseInfo,
755 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
756 SCSI_SENSE_BUFFERSIZE :
758 scsi_set_resid(cmd, ei->ResidualCnt);
760 if(ei->CommandStatus != 0)
761 { /* an error has occurred */
762 switch(ei->CommandStatus)
764 case CMD_TARGET_STATUS:
765 /* Pass it up to the upper layers... */
769 printk(KERN_WARNING "cciss: cmd %p "
770 "has SCSI Status = %x\n",
773 cmd->result |= (ei->ScsiStatus << 1);
775 else { /* scsi status is zero??? How??? */
777 /* Ordinarily, this case should never happen, but there is a bug
778 in some released firmware revisions that allows it to happen
779 if, for example, a 4100 backplane loses power and the tape
780 drive is in it. We assume that it's a fatal error of some
781 kind because we can't show that it wasn't. We will make it
782 look like selection timeout since that is the most common
783 reason for this to occur, and it's severe enough. */
785 cmd->result = DID_NO_CONNECT << 16;
788 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
790 case CMD_DATA_OVERRUN:
791 printk(KERN_WARNING "cciss: %p has"
792 " completed with data overrun "
796 /* print_bytes(c, sizeof(*c), 1, 0);
798 /* We get CMD_INVALID if you address a non-existent tape drive instead
799 of a selection timeout (no response). You will see this if you yank
800 out a tape drive, then try to access it. This is kind of a shame
801 because it means that any other CMD_INVALID (e.g. driver bug) will
802 get interpreted as a missing target. */
803 cmd->result = DID_NO_CONNECT << 16;
806 case CMD_PROTOCOL_ERR:
807 printk(KERN_WARNING "cciss: %p has "
808 "protocol error\n", c);
810 case CMD_HARDWARE_ERR:
811 cmd->result = DID_ERROR << 16;
812 printk(KERN_WARNING "cciss: %p had "
813 " hardware error\n", c);
815 case CMD_CONNECTION_LOST:
816 cmd->result = DID_ERROR << 16;
817 printk(KERN_WARNING "cciss: %p had "
818 "connection lost\n", c);
821 cmd->result = DID_ABORT << 16;
822 printk(KERN_WARNING "cciss: %p was "
825 case CMD_ABORT_FAILED:
826 cmd->result = DID_ERROR << 16;
827 printk(KERN_WARNING "cciss: %p reports "
828 "abort failed\n", c);
830 case CMD_UNSOLICITED_ABORT:
831 cmd->result = DID_ABORT << 16;
832 printk(KERN_WARNING "cciss: %p aborted "
833 "do to an unsolicited abort\n", c);
836 cmd->result = DID_TIME_OUT << 16;
837 printk(KERN_WARNING "cciss: %p timedout\n",
841 cmd->result = DID_ERROR << 16;
842 printk(KERN_WARNING "cciss: %p returned "
843 "unknown status %x\n", c,
852 cciss_scsi_detect(ctlr_info_t *h)
854 struct Scsi_Host *sh;
857 sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *));
860 sh->io_port = 0; // good enough? FIXME,
861 sh->n_io_port = 0; // I don't think we use these two...
862 sh->this_id = SELF_SCSI_ID;
863 sh->sg_tablesize = h->maxsgentries;
864 sh->max_cmd_len = MAX_COMMAND_SIZE;
866 ((struct cciss_scsi_adapter_data_t *)
867 h->scsi_ctlr)->scsi_host = sh;
868 sh->hostdata[0] = (unsigned long) h;
869 sh->irq = h->intr[SIMPLE_MODE_INT];
870 sh->unique_id = sh->irq;
871 error = scsi_add_host(sh, &h->pdev->dev);
884 cciss_unmap_one(struct pci_dev *pdev,
885 CommandList_struct *c,
891 addr64.val32.lower = c->SG[0].Addr.lower;
892 addr64.val32.upper = c->SG[0].Addr.upper;
893 pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction);
897 cciss_map_one(struct pci_dev *pdev,
898 CommandList_struct *c,
905 addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction);
906 c->SG[0].Addr.lower =
907 (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
908 c->SG[0].Addr.upper =
909 (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
910 c->SG[0].Len = buflen;
911 c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */
912 c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
916 cciss_scsi_do_simple_cmd(ctlr_info_t *h,
917 CommandList_struct *c,
918 unsigned char *scsi3addr,
920 unsigned char cdblen,
921 unsigned char *buf, int bufsize,
924 DECLARE_COMPLETION_ONSTACK(wait);
926 c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */
928 c->Header.ReplyQueue = 0; /* unused in simple mode */
929 memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN));
930 c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */
931 // Fill in the request block...
933 /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n",
934 scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
935 scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */
937 memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
938 memcpy(c->Request.CDB, cdb, cdblen);
939 c->Request.Timeout = 0;
940 c->Request.CDBLen = cdblen;
941 c->Request.Type.Type = TYPE_CMD;
942 c->Request.Type.Attribute = ATTR_SIMPLE;
943 c->Request.Type.Direction = direction;
945 /* Fill in the SG list and do dma mapping */
946 cciss_map_one(h->pdev, c, (unsigned char *) buf,
947 bufsize, DMA_FROM_DEVICE);
950 enqueue_cmd_and_start_io(h, c);
951 wait_for_completion(&wait);
953 /* undo the dma mapping */
954 cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE);
959 cciss_scsi_interpret_error(CommandList_struct *c)
961 ErrorInfo_struct *ei;
964 switch(ei->CommandStatus)
966 case CMD_TARGET_STATUS:
967 printk(KERN_WARNING "cciss: cmd %p has "
968 "completed with errors\n", c);
969 printk(KERN_WARNING "cciss: cmd %p "
970 "has SCSI Status = %x\n",
972 if (ei->ScsiStatus == 0)
974 "cciss:SCSI status is abnormally zero. "
975 "(probably indicates selection timeout "
976 "reported incorrectly due to a known "
977 "firmware bug, circa July, 2001.)\n");
979 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
980 printk("UNDERRUN\n");
982 case CMD_DATA_OVERRUN:
983 printk(KERN_WARNING "cciss: %p has"
984 " completed with data overrun "
988 /* controller unfortunately reports SCSI passthru's */
989 /* to non-existent targets as invalid commands. */
990 printk(KERN_WARNING "cciss: %p is "
991 "reported invalid (probably means "
992 "target device no longer present)\n", c);
993 /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0);
997 case CMD_PROTOCOL_ERR:
998 printk(KERN_WARNING "cciss: %p has "
999 "protocol error\n", c);
1001 case CMD_HARDWARE_ERR:
1002 /* cmd->result = DID_ERROR << 16; */
1003 printk(KERN_WARNING "cciss: %p had "
1004 " hardware error\n", c);
1006 case CMD_CONNECTION_LOST:
1007 printk(KERN_WARNING "cciss: %p had "
1008 "connection lost\n", c);
1011 printk(KERN_WARNING "cciss: %p was "
1014 case CMD_ABORT_FAILED:
1015 printk(KERN_WARNING "cciss: %p reports "
1016 "abort failed\n", c);
1018 case CMD_UNSOLICITED_ABORT:
1019 printk(KERN_WARNING "cciss: %p aborted "
1020 "do to an unsolicited abort\n", c);
1023 printk(KERN_WARNING "cciss: %p timedout\n", c);
1026 printk(KERN_WARNING "cciss: %p returned "
1027 "unknown status %x\n", c, ei->CommandStatus);
1032 cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr,
1033 unsigned char page, unsigned char *buf,
1034 unsigned char bufsize)
1037 CommandList_struct *c;
1039 ErrorInfo_struct *ei;
1040 unsigned long flags;
1042 spin_lock_irqsave(&h->lock, flags);
1043 c = scsi_cmd_alloc(h);
1044 spin_unlock_irqrestore(&h->lock, flags);
1046 if (c == NULL) { /* trouble... */
1047 printk("cmd_alloc returned NULL!\n");
1053 cdb[0] = CISS_INQUIRY;
1054 cdb[1] = (page != 0);
1059 rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb,
1060 6, buf, bufsize, XFER_READ);
1062 if (rc != 0) return rc; /* something went wrong */
1064 if (ei->CommandStatus != 0 &&
1065 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1066 cciss_scsi_interpret_error(c);
1069 spin_lock_irqsave(&h->lock, flags);
1070 scsi_cmd_free(h, c);
1071 spin_unlock_irqrestore(&h->lock, flags);
1075 /* Get the device id from inquiry page 0x83 */
1076 static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr,
1077 unsigned char *device_id, int buflen)
1084 buf = kzalloc(64, GFP_KERNEL);
1087 rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1089 memcpy(device_id, &buf[8], buflen);
1095 cciss_scsi_do_report_phys_luns(ctlr_info_t *h,
1096 ReportLunData_struct *buf, int bufsize)
1099 CommandList_struct *c;
1100 unsigned char cdb[12];
1101 unsigned char scsi3addr[8];
1102 ErrorInfo_struct *ei;
1103 unsigned long flags;
1105 spin_lock_irqsave(&h->lock, flags);
1106 c = scsi_cmd_alloc(h);
1107 spin_unlock_irqrestore(&h->lock, flags);
1108 if (c == NULL) { /* trouble... */
1109 printk("cmd_alloc returned NULL!\n");
1113 memset(&scsi3addr[0], 0, 8); /* address the controller */
1114 cdb[0] = CISS_REPORT_PHYS;
1120 cdb[6] = (bufsize >> 24) & 0xFF; //MSB
1121 cdb[7] = (bufsize >> 16) & 0xFF;
1122 cdb[8] = (bufsize >> 8) & 0xFF;
1123 cdb[9] = bufsize & 0xFF;
1127 rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr,
1129 (unsigned char *) buf,
1130 bufsize, XFER_READ);
1132 if (rc != 0) return rc; /* something went wrong */
1135 if (ei->CommandStatus != 0 &&
1136 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1137 cciss_scsi_interpret_error(c);
1140 spin_lock_irqsave(&h->lock, flags);
1141 scsi_cmd_free(h, c);
1142 spin_unlock_irqrestore(&h->lock, flags);
1147 cciss_update_non_disk_devices(ctlr_info_t *h, int hostno)
1149 /* the idea here is we could get notified from /proc
1150 that some devices have changed, so we do a report
1151 physical luns cmd, and adjust our list of devices
1152 accordingly. (We can't rely on the scsi-mid layer just
1153 doing inquiries, because the "busses" that the scsi
1154 mid-layer probes are totally fabricated by this driver,
1155 so new devices wouldn't show up.
1157 the scsi3addr's of devices won't change so long as the
1158 adapter is not reset. That means we can rescan and
1159 tell which devices we already know about, vs. new
1160 devices, vs. disappearing devices.
1162 Also, if you yank out a tape drive, then put in a disk
1163 in it's place, (say, a configured volume from another
1164 array controller for instance) _don't_ poke this driver
1165 (so it thinks it's still a tape, but _do_ poke the scsi
1166 mid layer, so it does an inquiry... the scsi mid layer
1167 will see the physical disk. This would be bad. Need to
1168 think about how to prevent that. One idea would be to
1169 snoop all scsi responses and if an inquiry repsonse comes
1170 back that reports a disk, chuck it an return selection
1171 timeout instead and adjust our table... Not sure i like
1175 #define OBDR_TAPE_INQ_SIZE 49
1176 #define OBDR_TAPE_SIG "$DR-10"
1177 ReportLunData_struct *ld_buff;
1178 unsigned char *inq_buff;
1179 unsigned char scsi3addr[8];
1182 struct cciss_scsi_dev_t *currentsd, *this_device;
1184 int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
1187 ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
1188 inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1189 currentsd = kzalloc(sizeof(*currentsd) *
1190 (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL);
1191 if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) {
1192 printk(KERN_ERR "cciss: out of memory\n");
1195 this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
1196 if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) {
1197 ch = &ld_buff->LUNListLength[0];
1198 num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
1199 if (num_luns > CISS_MAX_PHYS_LUN) {
1201 "cciss: Maximum physical LUNs (%d) exceeded. "
1202 "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN,
1203 num_luns - CISS_MAX_PHYS_LUN);
1204 num_luns = CISS_MAX_PHYS_LUN;
1208 printk(KERN_ERR "cciss: Report physical LUNs failed.\n");
1213 /* adjust our table of devices */
1214 for (i = 0; i < num_luns; i++) {
1215 /* for each physical lun, do an inquiry */
1216 if (ld_buff->LUN[i][3] & 0xC0) continue;
1217 memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
1218 memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
1220 if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1221 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
1222 /* Inquiry failed (msg printed already) */
1223 continue; /* so we will skip this device. */
1225 this_device->devtype = (inq_buff[0] & 0x1f);
1226 this_device->bus = -1;
1227 this_device->target = -1;
1228 this_device->lun = -1;
1229 memcpy(this_device->scsi3addr, scsi3addr, 8);
1230 memcpy(this_device->vendor, &inq_buff[8],
1231 sizeof(this_device->vendor));
1232 memcpy(this_device->model, &inq_buff[16],
1233 sizeof(this_device->model));
1234 memcpy(this_device->revision, &inq_buff[32],
1235 sizeof(this_device->revision));
1236 memset(this_device->device_id, 0,
1237 sizeof(this_device->device_id));
1238 cciss_scsi_get_device_id(h, scsi3addr,
1239 this_device->device_id, sizeof(this_device->device_id));
1241 switch (this_device->devtype)
1243 case 0x05: /* CD-ROM */ {
1245 /* We don't *really* support actual CD-ROM devices,
1246 * just this "One Button Disaster Recovery" tape drive
1247 * which temporarily pretends to be a CD-ROM drive.
1248 * So we check that the device is really an OBDR tape
1249 * device by checking for "$DR-10" in bytes 43-48 of
1254 strncpy(obdr_sig, &inq_buff[43], 6);
1256 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1257 /* Not OBDR device, ignore it. */
1260 /* fall through . . . */
1261 case 0x01: /* sequential access, (tape) */
1262 case 0x08: /* medium changer */
1263 if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
1264 printk(KERN_INFO "cciss%d: %s ignored, "
1265 "too many devices.\n", h->ctlr,
1266 scsi_device_type(this_device->devtype));
1269 currentsd[ncurrent] = *this_device;
1277 adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent);
1286 is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c
1288 int verb_len = strlen(verb);
1289 if (len >= verb_len && !memcmp(verb,ptr,verb_len))
1296 cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length)
1300 if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
1301 cciss_update_non_disk_devices(h, hostno);
1309 cciss_scsi_proc_info(struct Scsi_Host *sh,
1310 char *buffer, /* data buffer */
1311 char **start, /* where data in buffer starts */
1312 off_t offset, /* offset from start of imaginary file */
1313 int length, /* length of data in buffer */
1314 int func) /* 0 == read, 1 == write */
1317 int buflen, datalen;
1321 h = (ctlr_info_t *) sh->hostdata[0];
1322 if (h == NULL) /* This really shouldn't ever happen. */
1325 if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */
1326 buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n",
1327 h->ctlr, sh->host_no);
1329 /* this information is needed by apps to know which cciss
1330 device corresponds to which scsi host number without
1331 having to open a scsi target device node. The device
1332 information is not a duplicate of /proc/scsi/scsi because
1333 the two may be out of sync due to scsi hotplug, rather
1334 this info is for an app to be able to use to know how to
1335 get them back in sync. */
1337 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
1338 struct cciss_scsi_dev_t *sd =
1339 &ccissscsi[h->ctlr].dev[i];
1340 buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d "
1341 "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1342 sh->host_no, sd->bus, sd->target, sd->lun,
1344 sd->scsi3addr[0], sd->scsi3addr[1],
1345 sd->scsi3addr[2], sd->scsi3addr[3],
1346 sd->scsi3addr[4], sd->scsi3addr[5],
1347 sd->scsi3addr[6], sd->scsi3addr[7]);
1349 datalen = buflen - offset;
1350 if (datalen < 0) { /* they're reading past EOF. */
1352 *start = buffer+buflen;
1354 *start = buffer + offset;
1356 } else /* User is writing to /proc/scsi/cciss*?/?* ... */
1357 return cciss_scsi_user_command(h, sh->host_no,
1361 /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1362 dma mapping and fills in the scatter gather entries of the
1363 cciss command, c. */
1365 static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c,
1366 struct scsi_cmnd *cmd)
1369 struct scatterlist *sg;
1371 int request_nsgs, i, chained, sg_index;
1372 struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr;
1373 SGDescriptor_struct *curr_sg;
1375 BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1380 request_nsgs = scsi_dma_map(cmd);
1382 scsi_for_each_sg(cmd, sg, request_nsgs, i) {
1383 if (sg_index + 1 == h->max_cmd_sgentries &&
1384 !chained && request_nsgs - i > 1) {
1387 curr_sg = sa->cmd_sg_list[c->cmdindex];
1389 addr64 = (__u64) sg_dma_address(sg);
1390 len = sg_dma_len(sg);
1391 curr_sg[sg_index].Addr.lower =
1392 (__u32) (addr64 & 0x0FFFFFFFFULL);
1393 curr_sg[sg_index].Addr.upper =
1394 (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1395 curr_sg[sg_index].Len = len;
1396 curr_sg[sg_index].Ext = 0;
1400 cciss_map_sg_chain_block(h, c,
1401 sa->cmd_sg_list[c->cmdindex],
1402 (request_nsgs - (h->max_cmd_sgentries - 1)) *
1403 sizeof(SGDescriptor_struct));
1405 /* track how many SG entries we are using */
1406 if (request_nsgs > h->maxSG)
1407 h->maxSG = request_nsgs;
1408 c->Header.SGTotal = (__u8) request_nsgs + chained;
1409 if (request_nsgs > h->max_cmd_sgentries)
1410 c->Header.SGList = h->max_cmd_sgentries;
1412 c->Header.SGList = c->Header.SGTotal;
1418 cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
1422 unsigned char scsi3addr[8];
1423 CommandList_struct *c;
1424 unsigned long flags;
1426 // Get the ptr to our adapter structure (hba[i]) out of cmd->host.
1427 // We violate cmd->host privacy here. (Is there another way?)
1428 h = (ctlr_info_t *) cmd->device->host->hostdata[0];
1430 rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id,
1431 cmd->device->lun, scsi3addr);
1433 /* the scsi nexus does not match any that we presented... */
1434 /* pretend to mid layer that we got selection timeout */
1435 cmd->result = DID_NO_CONNECT << 16;
1437 /* we might want to think about registering controller itself
1438 as a processor device on the bus so sg binds to it. */
1442 /* Ok, we have a reasonable scsi nexus, so send the cmd down, and
1443 see what the device thinks of it. */
1445 spin_lock_irqsave(&h->lock, flags);
1446 c = scsi_cmd_alloc(h);
1447 spin_unlock_irqrestore(&h->lock, flags);
1448 if (c == NULL) { /* trouble... */
1449 printk("scsi_cmd_alloc returned NULL!\n");
1450 /* FIXME: next 3 lines are -> BAD! <- */
1451 cmd->result = DID_NO_CONNECT << 16;
1456 // Fill in the command list header
1458 cmd->scsi_done = done; // save this for use by completion code
1460 /* save c in case we have to abort it */
1461 cmd->host_scribble = (unsigned char *) c;
1463 c->cmd_type = CMD_SCSI;
1465 c->Header.ReplyQueue = 0; /* unused in simple mode */
1466 memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1467 c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */
1469 // Fill in the request block...
1471 c->Request.Timeout = 0;
1472 memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1473 BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1474 c->Request.CDBLen = cmd->cmd_len;
1475 memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1476 c->Request.Type.Type = TYPE_CMD;
1477 c->Request.Type.Attribute = ATTR_SIMPLE;
1478 switch(cmd->sc_data_direction)
1481 c->Request.Type.Direction = XFER_WRITE;
1483 case DMA_FROM_DEVICE:
1484 c->Request.Type.Direction = XFER_READ;
1487 c->Request.Type.Direction = XFER_NONE;
1489 case DMA_BIDIRECTIONAL:
1490 // This can happen if a buggy application does a scsi passthru
1491 // and sets both inlen and outlen to non-zero. ( see
1492 // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1494 c->Request.Type.Direction = XFER_RSVD;
1495 // This is technically wrong, and cciss controllers should
1496 // reject it with CMD_INVALID, which is the most correct
1497 // response, but non-fibre backends appear to let it
1498 // slide by, and give the same results as if this field
1499 // were set correctly. Either way is acceptable for
1500 // our purposes here.
1505 printk("cciss: unknown data direction: %d\n",
1506 cmd->sc_data_direction);
1510 cciss_scatter_gather(h, c, cmd);
1511 enqueue_cmd_and_start_io(h, c);
1512 /* the cmd'll come back via intr handler in complete_scsi_command() */
1516 static void cciss_unregister_scsi(ctlr_info_t *h)
1518 struct cciss_scsi_adapter_data_t *sa;
1519 struct cciss_scsi_cmd_stack_t *stk;
1520 unsigned long flags;
1522 /* we are being forcibly unloaded, and may not refuse. */
1524 spin_lock_irqsave(&h->lock, flags);
1526 stk = &sa->cmd_stack;
1528 /* if we weren't ever actually registered, don't unregister */
1529 if (sa->registered) {
1530 spin_unlock_irqrestore(&h->lock, flags);
1531 scsi_remove_host(sa->scsi_host);
1532 scsi_host_put(sa->scsi_host);
1533 spin_lock_irqsave(&h->lock, flags);
1536 /* set scsi_host to NULL so our detect routine will
1537 find us on register */
1538 sa->scsi_host = NULL;
1539 spin_unlock_irqrestore(&h->lock, flags);
1540 scsi_cmd_stack_free(h);
1544 static int cciss_engage_scsi(ctlr_info_t *h)
1546 struct cciss_scsi_adapter_data_t *sa;
1547 struct cciss_scsi_cmd_stack_t *stk;
1548 unsigned long flags;
1550 spin_lock_irqsave(&h->lock, flags);
1552 stk = &sa->cmd_stack;
1554 if (sa->registered) {
1555 printk(KERN_INFO "cciss%d: SCSI subsystem already engaged.\n",
1557 spin_unlock_irqrestore(&h->lock, flags);
1561 spin_unlock_irqrestore(&h->lock, flags);
1562 cciss_update_non_disk_devices(h, -1);
1563 cciss_scsi_detect(h);
1568 cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h)
1570 unsigned long flags;
1572 CPQ_TAPE_LOCK(h, flags);
1574 "Sequential access devices: %d\n\n",
1575 ccissscsi[h->ctlr].ndevices);
1576 CPQ_TAPE_UNLOCK(h, flags);
1579 static int wait_for_device_to_become_ready(ctlr_info_t *h,
1580 unsigned char lunaddr[])
1585 CommandList_struct *c;
1589 printk(KERN_WARNING "cciss%d: out of memory in "
1590 "wait_for_device_to_become_ready.\n", h->ctlr);
1594 /* Send test unit ready until device ready, or give up. */
1595 while (count < 20) {
1597 /* Wait for a bit. do this first, because if we send
1598 * the TUR right away, the reset will just abort it.
1600 schedule_timeout_uninterruptible(waittime);
1603 /* Increase wait time with each try, up to a point. */
1604 if (waittime < (HZ * 30))
1605 waittime = waittime * 2;
1607 /* Send the Test Unit Ready */
1608 rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0,
1611 rc = sendcmd_withirq_core(h, c, 0);
1613 (void) process_sendcmd_error(h, c);
1618 if (c->err_info->CommandStatus == CMD_SUCCESS)
1621 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1622 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1623 if (c->err_info->SenseInfo[2] == NO_SENSE)
1625 if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) {
1627 asc = c->err_info->SenseInfo[12];
1628 check_for_unit_attention(h, c);
1629 if (asc == POWER_OR_RESET)
1634 printk(KERN_WARNING "cciss%d: Waiting %d secs "
1635 "for device to become ready.\n",
1636 h->ctlr, waittime / HZ);
1637 rc = 1; /* device not ready. */
1641 printk("cciss%d: giving up on device.\n", h->ctlr);
1643 printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr);
1649 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
1650 * complaining. Doing a host- or bus-reset can't do anything good here.
1651 * Despite what it might say in scsi_error.c, there may well be commands
1652 * on the controller, as the cciss driver registers twice, once as a block
1653 * device for the logical drives, and once as a scsi device, for any tape
1654 * drives. So we know there are no commands out on the tape drives, but we
1655 * don't know there are no commands on the controller, and it is likely
1656 * that there probably are, as the cciss block device is most commonly used
1657 * as a boot device (embedded controller on HP/Compaq systems.)
1660 static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
1663 CommandList_struct *cmd_in_trouble;
1664 unsigned char lunaddr[8];
1667 /* find the controller to which the command to be aborted was sent */
1668 h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1669 if (h == NULL) /* paranoia */
1672 "cciss%d: resetting tape drive or medium changer.\n", h->ctlr);
1673 /* find the command that's giving us trouble */
1674 cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
1675 if (cmd_in_trouble == NULL) /* paranoia */
1677 memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
1678 /* send a reset to the SCSI LUN which the command was sent to */
1679 rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr,
1681 if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0)
1683 printk(KERN_WARNING "cciss%d: resetting device failed.\n", h->ctlr);
1687 static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
1690 CommandList_struct *cmd_to_abort;
1691 unsigned char lunaddr[8];
1694 /* find the controller to which the command to be aborted was sent */
1695 h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1696 if (h == NULL) /* paranoia */
1698 printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", h->ctlr);
1700 /* find the command to be aborted */
1701 cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
1702 if (cmd_to_abort == NULL) /* paranoia */
1704 memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8);
1705 rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag,
1706 0, 0, lunaddr, TYPE_MSG);
1713 #else /* no CONFIG_CISS_SCSI_TAPE */
1715 /* If no tape support, then these become defined out of existence */
1717 #define cciss_scsi_setup(cntl_num)
1719 #endif /* CONFIG_CISS_SCSI_TAPE */