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(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
49 __u8 page_code, unsigned char *scsi3addr,
52 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool);
53 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool);
55 static int cciss_scsi_proc_info(
57 char *buffer, /* data buffer */
58 char **start, /* where data in buffer starts */
59 off_t offset, /* offset from start of imaginary file */
60 int length, /* length of data in buffer */
61 int func); /* 0 == read, 1 == write */
63 static int cciss_scsi_queue_command (struct scsi_cmnd *cmd,
64 void (* done)(struct scsi_cmnd *));
65 static int cciss_eh_device_reset_handler(struct scsi_cmnd *);
66 static int cciss_eh_abort_handler(struct scsi_cmnd *);
68 static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = {
69 { .name = "cciss0", .ndevices = 0 },
70 { .name = "cciss1", .ndevices = 0 },
71 { .name = "cciss2", .ndevices = 0 },
72 { .name = "cciss3", .ndevices = 0 },
73 { .name = "cciss4", .ndevices = 0 },
74 { .name = "cciss5", .ndevices = 0 },
75 { .name = "cciss6", .ndevices = 0 },
76 { .name = "cciss7", .ndevices = 0 },
79 static struct scsi_host_template cciss_driver_template = {
80 .module = THIS_MODULE,
83 .proc_info = cciss_scsi_proc_info,
84 .queuecommand = cciss_scsi_queue_command,
85 .can_queue = SCSI_CCISS_CAN_QUEUE,
88 .use_clustering = DISABLE_CLUSTERING,
89 /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */
90 .eh_device_reset_handler= cciss_eh_device_reset_handler,
91 .eh_abort_handler = cciss_eh_abort_handler,
99 struct cciss_scsi_cmd_stack_elem_t {
100 CommandList_struct cmd;
101 ErrorInfo_struct Err;
104 u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64];
109 #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \
110 CCISS_MAX_SCSI_DEVS_PER_HBA + 2)
111 // plus two for init time usage
114 struct cciss_scsi_cmd_stack_t {
115 struct cciss_scsi_cmd_stack_elem_t *pool;
116 struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE];
117 dma_addr_t cmd_pool_handle;
122 struct cciss_scsi_adapter_data_t {
123 struct Scsi_Host *scsi_host;
124 struct cciss_scsi_cmd_stack_t cmd_stack;
125 SGDescriptor_struct **cmd_sg_list;
127 spinlock_t lock; // to protect ccissscsi[ctlr];
130 #define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \
131 &hba[ctlr]->scsi_ctlr->lock, flags);
132 #define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \
133 &hba[ctlr]->scsi_ctlr->lock, flags);
135 static CommandList_struct *
136 scsi_cmd_alloc(ctlr_info_t *h)
138 /* assume only one process in here at a time, locking done by caller. */
139 /* use CCISS_LOCK(ctlr) */
140 /* might be better to rewrite how we allocate scsi commands in a way that */
141 /* needs no locking at all. */
143 /* take the top memory chunk off the stack and return it, if any. */
144 struct cciss_scsi_cmd_stack_elem_t *c;
145 struct cciss_scsi_adapter_data_t *sa;
146 struct cciss_scsi_cmd_stack_t *stk;
150 stk = &sa->cmd_stack;
154 c = stk->elem[stk->top];
155 /* memset(c, 0, sizeof(*c)); */
156 memset(&c->cmd, 0, sizeof(c->cmd));
157 memset(&c->Err, 0, sizeof(c->Err));
158 /* set physical addr of cmd and addr of scsi parameters */
159 c->cmd.busaddr = c->busaddr;
160 c->cmd.cmdindex = c->cmdindex;
161 /* (__u32) (stk->cmd_pool_handle +
162 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */
164 temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct));
165 /* (__u64) (stk->cmd_pool_handle +
166 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) +
167 sizeof(CommandList_struct)); */
169 c->cmd.ErrDesc.Addr.lower = temp64.val32.lower;
170 c->cmd.ErrDesc.Addr.upper = temp64.val32.upper;
171 c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct);
173 c->cmd.ctlr = h->ctlr;
174 c->cmd.err_info = &c->Err;
176 return (CommandList_struct *) c;
180 scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd)
182 /* assume only one process in here at a time, locking done by caller. */
183 /* use CCISS_LOCK(ctlr) */
184 /* drop the free memory chunk on top of the stack. */
186 struct cciss_scsi_adapter_data_t *sa;
187 struct cciss_scsi_cmd_stack_t *stk;
190 stk = &sa->cmd_stack;
192 if (stk->top >= CMD_STACK_SIZE) {
193 printk("cciss: scsi_cmd_free called too many times.\n");
196 stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd;
200 scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa)
203 struct cciss_scsi_cmd_stack_t *stk;
206 sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[ctlr],
207 hba[ctlr]->chainsize, CMD_STACK_SIZE);
208 if (!sa->cmd_sg_list && hba[ctlr]->chainsize > 0)
211 stk = &sa->cmd_stack;
212 size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
214 /* Check alignment, see cciss_cmd.h near CommandList_struct def. */
215 BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
216 /* pci_alloc_consistent guarantees 32-bit DMA address will be used */
217 stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
218 pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle);
220 if (stk->pool == NULL) {
221 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
222 sa->cmd_sg_list = NULL;
226 for (i=0; i<CMD_STACK_SIZE; i++) {
227 stk->elem[i] = &stk->pool[i];
228 stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle +
229 (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
230 stk->elem[i]->cmdindex = i;
232 stk->top = CMD_STACK_SIZE-1;
237 scsi_cmd_stack_free(int ctlr)
239 struct cciss_scsi_adapter_data_t *sa;
240 struct cciss_scsi_cmd_stack_t *stk;
243 sa = hba[ctlr]->scsi_ctlr;
244 stk = &sa->cmd_stack;
245 if (stk->top != CMD_STACK_SIZE-1) {
246 printk( "cciss: %d scsi commands are still outstanding.\n",
247 CMD_STACK_SIZE - stk->top);
249 printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk);
251 size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
253 pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle);
255 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
259 static int xmargin=8;
260 static int amargin=60;
263 print_bytes (unsigned char *c, int len, int hex, int ascii)
274 if ((i % xmargin) == 0 && i>0) printk("\n");
275 if ((i % xmargin) == 0) printk("0x%04x:", i);
286 if ((i % amargin) == 0 && i>0) printk("\n");
287 if ((i % amargin) == 0) printk("0x%04x:", i);
288 if (*x > 26 && *x < 128) printk("%c", *x);
297 print_cmd(CommandList_struct *cp)
299 printk("queue:%d\n", cp->Header.ReplyQueue);
300 printk("sglist:%d\n", cp->Header.SGList);
301 printk("sgtot:%d\n", cp->Header.SGTotal);
302 printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper,
303 cp->Header.Tag.lower);
304 printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
305 cp->Header.LUN.LunAddrBytes[0],
306 cp->Header.LUN.LunAddrBytes[1],
307 cp->Header.LUN.LunAddrBytes[2],
308 cp->Header.LUN.LunAddrBytes[3],
309 cp->Header.LUN.LunAddrBytes[4],
310 cp->Header.LUN.LunAddrBytes[5],
311 cp->Header.LUN.LunAddrBytes[6],
312 cp->Header.LUN.LunAddrBytes[7]);
313 printk("CDBLen:%d\n", cp->Request.CDBLen);
314 printk("Type:%d\n",cp->Request.Type.Type);
315 printk("Attr:%d\n",cp->Request.Type.Attribute);
316 printk(" Dir:%d\n",cp->Request.Type.Direction);
317 printk("Timeout:%d\n",cp->Request.Timeout);
318 printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x"
319 " %02x %02x %02x %02x %02x %02x %02x %02x\n",
320 cp->Request.CDB[0], cp->Request.CDB[1],
321 cp->Request.CDB[2], cp->Request.CDB[3],
322 cp->Request.CDB[4], cp->Request.CDB[5],
323 cp->Request.CDB[6], cp->Request.CDB[7],
324 cp->Request.CDB[8], cp->Request.CDB[9],
325 cp->Request.CDB[10], cp->Request.CDB[11],
326 cp->Request.CDB[12], cp->Request.CDB[13],
327 cp->Request.CDB[14], cp->Request.CDB[15]),
328 printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n",
329 cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower,
331 printk("sgs..........Errorinfo:\n");
332 printk("scsistatus:%d\n", cp->err_info->ScsiStatus);
333 printk("senselen:%d\n", cp->err_info->SenseLen);
334 printk("cmd status:%d\n", cp->err_info->CommandStatus);
335 printk("resid cnt:%d\n", cp->err_info->ResidualCnt);
336 printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size);
337 printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num);
338 printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
345 find_bus_target_lun(int ctlr, int *bus, int *target, int *lun)
347 /* finds an unused bus, target, lun for a new device */
348 /* assumes hba[ctlr]->scsi_ctlr->lock is held */
350 unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA];
352 memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA);
354 target_taken[SELF_SCSI_ID] = 1;
355 for (i=0;i<ccissscsi[ctlr].ndevices;i++)
356 target_taken[ccissscsi[ctlr].dev[i].target] = 1;
358 for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) {
359 if (!target_taken[i]) {
360 *bus = 0; *target=i; *lun = 0; found=1;
368 int bus, target, lun;
372 cciss_scsi_add_entry(int ctlr, int hostno,
373 struct cciss_scsi_dev_t *device,
374 struct scsi2map *added, int *nadded)
376 /* assumes hba[ctlr]->scsi_ctlr->lock is held */
377 int n = ccissscsi[ctlr].ndevices;
378 struct cciss_scsi_dev_t *sd;
379 int i, bus, target, lun;
380 unsigned char addr1[8], addr2[8];
382 if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
383 printk("cciss%d: Too many devices, "
384 "some will be inaccessible.\n", ctlr);
390 /* Is this device a non-zero lun of a multi-lun device */
391 /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */
392 if (device->scsi3addr[4] != 0) {
393 /* Search through our list and find the device which */
394 /* has the same 8 byte LUN address, excepting byte 4. */
395 /* Assign the same bus and target for this new LUN. */
396 /* Use the logical unit number from the firmware. */
397 memcpy(addr1, device->scsi3addr, 8);
399 for (i = 0; i < n; i++) {
400 sd = &ccissscsi[ctlr].dev[i];
401 memcpy(addr2, sd->scsi3addr, 8);
403 /* differ only in byte 4? */
404 if (memcmp(addr1, addr2, 8) == 0) {
407 lun = device->scsi3addr[4];
413 sd = &ccissscsi[ctlr].dev[n];
415 if (find_bus_target_lun(ctlr,
416 &sd->bus, &sd->target, &sd->lun) != 0)
423 added[*nadded].bus = sd->bus;
424 added[*nadded].target = sd->target;
425 added[*nadded].lun = sd->lun;
428 memcpy(sd->scsi3addr, device->scsi3addr, 8);
429 memcpy(sd->vendor, device->vendor, sizeof(sd->vendor));
430 memcpy(sd->revision, device->revision, sizeof(sd->revision));
431 memcpy(sd->device_id, device->device_id, sizeof(sd->device_id));
432 sd->devtype = device->devtype;
434 ccissscsi[ctlr].ndevices++;
436 /* initially, (before registering with scsi layer) we don't
437 know our hostno and we don't want to print anything first
438 time anyway (the scsi layer's inquiries will show that info) */
440 printk("cciss%d: %s device c%db%dt%dl%d added.\n",
441 ctlr, scsi_device_type(sd->devtype), hostno,
442 sd->bus, sd->target, sd->lun);
447 cciss_scsi_remove_entry(int ctlr, int hostno, int entry,
448 struct scsi2map *removed, int *nremoved)
450 /* assumes hba[ctlr]->scsi_ctlr->lock is held */
452 struct cciss_scsi_dev_t sd;
454 if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return;
455 sd = ccissscsi[ctlr].dev[entry];
456 removed[*nremoved].bus = sd.bus;
457 removed[*nremoved].target = sd.target;
458 removed[*nremoved].lun = sd.lun;
460 for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++)
461 ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1];
462 ccissscsi[ctlr].ndevices--;
463 printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
464 ctlr, scsi_device_type(sd.devtype), hostno,
465 sd.bus, sd.target, sd.lun);
469 #define SCSI3ADDR_EQ(a,b) ( \
470 (a)[7] == (b)[7] && \
471 (a)[6] == (b)[6] && \
472 (a)[5] == (b)[5] && \
473 (a)[4] == (b)[4] && \
474 (a)[3] == (b)[3] && \
475 (a)[2] == (b)[2] && \
476 (a)[1] == (b)[1] && \
479 static void fixup_botched_add(int ctlr, char *scsi3addr)
481 /* called when scsi_add_device fails in order to re-adjust */
482 /* ccissscsi[] to match the mid layer's view. */
485 CPQ_TAPE_LOCK(ctlr, flags);
486 for (i = 0; i < ccissscsi[ctlr].ndevices; i++) {
487 if (memcmp(scsi3addr,
488 ccissscsi[ctlr].dev[i].scsi3addr, 8) == 0) {
489 for (j = i; j < ccissscsi[ctlr].ndevices-1; j++)
490 ccissscsi[ctlr].dev[j] =
491 ccissscsi[ctlr].dev[j+1];
492 ccissscsi[ctlr].ndevices--;
496 CPQ_TAPE_UNLOCK(ctlr, flags);
499 static int device_is_the_same(struct cciss_scsi_dev_t *dev1,
500 struct cciss_scsi_dev_t *dev2)
502 return dev1->devtype == dev2->devtype &&
503 memcmp(dev1->scsi3addr, dev2->scsi3addr,
504 sizeof(dev1->scsi3addr)) == 0 &&
505 memcmp(dev1->device_id, dev2->device_id,
506 sizeof(dev1->device_id)) == 0 &&
507 memcmp(dev1->vendor, dev2->vendor,
508 sizeof(dev1->vendor)) == 0 &&
509 memcmp(dev1->model, dev2->model,
510 sizeof(dev1->model)) == 0 &&
511 memcmp(dev1->revision, dev2->revision,
512 sizeof(dev1->revision)) == 0;
516 adjust_cciss_scsi_table(int ctlr, int hostno,
517 struct cciss_scsi_dev_t sd[], int nsds)
519 /* sd contains scsi3 addresses and devtypes, but
520 bus target and lun are not filled in. This funciton
521 takes what's in sd to be the current and adjusts
522 ccissscsi[] to be in line with what's in sd. */
524 int i,j, found, changes=0;
525 struct cciss_scsi_dev_t *csd;
527 struct scsi2map *added, *removed;
528 int nadded, nremoved;
529 struct Scsi_Host *sh = NULL;
531 added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA,
533 removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA,
536 if (!added || !removed) {
537 printk(KERN_WARNING "cciss%d: Out of memory in "
538 "adjust_cciss_scsi_table\n", ctlr);
542 CPQ_TAPE_LOCK(ctlr, flags);
544 if (hostno != -1) /* if it's not the first time... */
545 sh = hba[ctlr]->scsi_ctlr->scsi_host;
547 /* find any devices in ccissscsi[] that are not in
548 sd[] and remove them from ccissscsi[] */
553 while(i<ccissscsi[ctlr].ndevices) {
554 csd = &ccissscsi[ctlr].dev[i];
556 for (j=0;j<nsds;j++) {
557 if (SCSI3ADDR_EQ(sd[j].scsi3addr,
559 if (device_is_the_same(&sd[j], csd))
567 if (found == 0) { /* device no longer present. */
569 /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
570 ctlr, scsi_device_type(csd->devtype), hostno,
571 csd->bus, csd->target, csd->lun); */
572 cciss_scsi_remove_entry(ctlr, hostno, i,
574 /* remove ^^^, hence i not incremented */
575 } else if (found == 1) { /* device is different in some way */
577 printk("cciss%d: device c%db%dt%dl%d has changed.\n",
578 ctlr, hostno, csd->bus, csd->target, csd->lun);
579 cciss_scsi_remove_entry(ctlr, hostno, i,
581 /* remove ^^^, hence i not incremented */
582 if (cciss_scsi_add_entry(ctlr, hostno, &sd[j],
583 added, &nadded) != 0)
584 /* we just removed one, so add can't fail. */
586 csd->devtype = sd[j].devtype;
587 memcpy(csd->device_id, sd[j].device_id,
588 sizeof(csd->device_id));
589 memcpy(csd->vendor, sd[j].vendor,
590 sizeof(csd->vendor));
591 memcpy(csd->model, sd[j].model,
593 memcpy(csd->revision, sd[j].revision,
594 sizeof(csd->revision));
595 } else /* device is same as it ever was, */
596 i++; /* so just move along. */
599 /* Now, make sure every device listed in sd[] is also
600 listed in ccissscsi[], adding them if they aren't found */
602 for (i=0;i<nsds;i++) {
604 for (j=0;j<ccissscsi[ctlr].ndevices;j++) {
605 csd = &ccissscsi[ctlr].dev[j];
606 if (SCSI3ADDR_EQ(sd[i].scsi3addr,
608 if (device_is_the_same(&sd[i], csd))
609 found=2; /* found device */
611 found=1; /* found a bug. */
617 if (cciss_scsi_add_entry(ctlr, hostno, &sd[i],
618 added, &nadded) != 0)
620 } else if (found == 1) {
621 /* should never happen... */
623 printk(KERN_WARNING "cciss%d: device "
624 "unexpectedly changed\n", ctlr);
625 /* but if it does happen, we just ignore that device */
628 CPQ_TAPE_UNLOCK(ctlr, flags);
630 /* Don't notify scsi mid layer of any changes the first time through */
631 /* (or if there are no changes) scsi_scan_host will do it later the */
632 /* first time through. */
633 if (hostno == -1 || !changes)
636 /* Notify scsi mid layer of any removed devices */
637 for (i = 0; i < nremoved; i++) {
638 struct scsi_device *sdev =
639 scsi_device_lookup(sh, removed[i].bus,
640 removed[i].target, removed[i].lun);
642 scsi_remove_device(sdev);
643 scsi_device_put(sdev);
645 /* We don't expect to get here. */
646 /* future cmds to this device will get selection */
647 /* timeout as if the device was gone. */
648 printk(KERN_WARNING "cciss%d: didn't find "
649 "c%db%dt%dl%d\n for removal.",
650 ctlr, hostno, removed[i].bus,
651 removed[i].target, removed[i].lun);
655 /* Notify scsi mid layer of any added devices */
656 for (i = 0; i < nadded; i++) {
658 rc = scsi_add_device(sh, added[i].bus,
659 added[i].target, added[i].lun);
662 printk(KERN_WARNING "cciss%d: scsi_add_device "
663 "c%db%dt%dl%d failed, device not added.\n",
665 added[i].bus, added[i].target, added[i].lun);
666 /* now we have to remove it from ccissscsi, */
667 /* since it didn't get added to scsi mid layer */
668 fixup_botched_add(ctlr, added[i].scsi3addr);
678 lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr)
681 struct cciss_scsi_dev_t *sd;
684 CPQ_TAPE_LOCK(ctlr, flags);
685 for (i=0;i<ccissscsi[ctlr].ndevices;i++) {
686 sd = &ccissscsi[ctlr].dev[i];
687 if (sd->bus == bus &&
688 sd->target == target &&
690 memcpy(scsi3addr, &sd->scsi3addr[0], 8);
691 CPQ_TAPE_UNLOCK(ctlr, flags);
695 CPQ_TAPE_UNLOCK(ctlr, flags);
700 cciss_scsi_setup(int cntl_num)
702 struct cciss_scsi_adapter_data_t * shba;
704 ccissscsi[cntl_num].ndevices = 0;
705 shba = (struct cciss_scsi_adapter_data_t *)
706 kmalloc(sizeof(*shba), GFP_KERNEL);
709 shba->scsi_host = NULL;
710 spin_lock_init(&shba->lock);
711 shba->registered = 0;
712 if (scsi_cmd_stack_setup(cntl_num, shba) != 0) {
716 hba[cntl_num]->scsi_ctlr = shba;
721 complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag)
723 struct scsi_cmnd *cmd;
725 ErrorInfo_struct *ei;
729 /* First, see if it was a message rather than a command */
730 if (cp->Request.Type.Type == TYPE_MSG) {
731 cp->cmd_type = CMD_MSG_DONE;
735 cmd = (struct scsi_cmnd *) cp->scsi_cmd;
736 ctlr = hba[cp->ctlr];
739 if (cp->Header.SGTotal > ctlr->max_cmd_sgentries)
740 cciss_unmap_sg_chain_block(ctlr, cp);
742 cmd->result = (DID_OK << 16); /* host byte */
743 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
744 /* cmd->result |= (GOOD < 1); */ /* status byte */
746 cmd->result |= (ei->ScsiStatus);
747 /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */
749 /* copy the sense data whether we need to or not. */
751 memcpy(cmd->sense_buffer, ei->SenseInfo,
752 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
753 SCSI_SENSE_BUFFERSIZE :
755 scsi_set_resid(cmd, ei->ResidualCnt);
757 if(ei->CommandStatus != 0)
758 { /* an error has occurred */
759 switch(ei->CommandStatus)
761 case CMD_TARGET_STATUS:
762 /* Pass it up to the upper layers... */
766 printk(KERN_WARNING "cciss: cmd %p "
767 "has SCSI Status = %x\n",
771 cmd->result |= (ei->ScsiStatus << 1);
773 else { /* scsi status is zero??? How??? */
775 /* Ordinarily, this case should never happen, but there is a bug
776 in some released firmware revisions that allows it to happen
777 if, for example, a 4100 backplane loses power and the tape
778 drive is in it. We assume that it's a fatal error of some
779 kind because we can't show that it wasn't. We will make it
780 look like selection timeout since that is the most common
781 reason for this to occur, and it's severe enough. */
783 cmd->result = DID_NO_CONNECT << 16;
786 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
788 case CMD_DATA_OVERRUN:
789 printk(KERN_WARNING "cciss: cp %p has"
790 " completed with data overrun "
794 /* print_bytes(cp, sizeof(*cp), 1, 0);
796 /* We get CMD_INVALID if you address a non-existent tape drive instead
797 of a selection timeout (no response). You will see this if you yank
798 out a tape drive, then try to access it. This is kind of a shame
799 because it means that any other CMD_INVALID (e.g. driver bug) will
800 get interpreted as a missing target. */
801 cmd->result = DID_NO_CONNECT << 16;
804 case CMD_PROTOCOL_ERR:
805 printk(KERN_WARNING "cciss: cp %p has "
806 "protocol error \n", cp);
808 case CMD_HARDWARE_ERR:
809 cmd->result = DID_ERROR << 16;
810 printk(KERN_WARNING "cciss: cp %p had "
811 " hardware error\n", cp);
813 case CMD_CONNECTION_LOST:
814 cmd->result = DID_ERROR << 16;
815 printk(KERN_WARNING "cciss: cp %p had "
816 "connection lost\n", cp);
819 cmd->result = DID_ABORT << 16;
820 printk(KERN_WARNING "cciss: cp %p was "
823 case CMD_ABORT_FAILED:
824 cmd->result = DID_ERROR << 16;
825 printk(KERN_WARNING "cciss: cp %p reports "
826 "abort failed\n", cp);
828 case CMD_UNSOLICITED_ABORT:
829 cmd->result = DID_ABORT << 16;
830 printk(KERN_WARNING "cciss: cp %p aborted "
831 "do to an unsolicited abort\n", cp);
834 cmd->result = DID_TIME_OUT << 16;
835 printk(KERN_WARNING "cciss: cp %p timedout\n",
839 cmd->result = DID_ERROR << 16;
840 printk(KERN_WARNING "cciss: cp %p returned "
841 "unknown status %x\n", cp,
845 // printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel,
846 // cmd->target, cmd->lun);
848 scsi_cmd_free(ctlr, cp);
852 cciss_scsi_detect(int ctlr)
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 = hba[ctlr]->maxsgentries;
864 sh->max_cmd_len = MAX_COMMAND_SIZE;
866 ((struct cciss_scsi_adapter_data_t *)
867 hba[ctlr]->scsi_ctlr)->scsi_host = sh;
868 sh->hostdata[0] = (unsigned long) hba[ctlr];
869 sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT];
870 sh->unique_id = sh->irq;
871 error = scsi_add_host(sh, &hba[ctlr]->pdev->dev);
884 cciss_unmap_one(struct pci_dev *pdev,
885 CommandList_struct *cp,
891 addr64.val32.lower = cp->SG[0].Addr.lower;
892 addr64.val32.upper = cp->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 *cp,
905 addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction);
906 cp->SG[0].Addr.lower =
907 (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
908 cp->SG[0].Addr.upper =
909 (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
910 cp->SG[0].Len = buflen;
911 cp->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */
912 cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
916 cciss_scsi_do_simple_cmd(ctlr_info_t *c,
917 CommandList_struct *cp,
918 unsigned char *scsi3addr,
920 unsigned char cdblen,
921 unsigned char *buf, int bufsize,
925 DECLARE_COMPLETION_ONSTACK(wait);
927 cp->cmd_type = CMD_IOCTL_PEND; // treat this like an ioctl
929 cp->Header.ReplyQueue = 0; // unused in simple mode
930 memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN));
931 cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag
932 // Fill in the request block...
934 /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n",
935 scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
936 scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */
938 memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB));
939 memcpy(cp->Request.CDB, cdb, cdblen);
940 cp->Request.Timeout = 0;
941 cp->Request.CDBLen = cdblen;
942 cp->Request.Type.Type = TYPE_CMD;
943 cp->Request.Type.Attribute = ATTR_SIMPLE;
944 cp->Request.Type.Direction = direction;
946 /* Fill in the SG list and do dma mapping */
947 cciss_map_one(c->pdev, cp, (unsigned char *) buf,
948 bufsize, DMA_FROM_DEVICE);
952 /* Put the request on the tail of the request queue */
953 spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
957 spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
959 wait_for_completion(&wait);
961 /* undo the dma mapping */
962 cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE);
967 cciss_scsi_interpret_error(CommandList_struct *cp)
969 ErrorInfo_struct *ei;
972 switch(ei->CommandStatus)
974 case CMD_TARGET_STATUS:
975 printk(KERN_WARNING "cciss: cmd %p has "
976 "completed with errors\n", cp);
977 printk(KERN_WARNING "cciss: cmd %p "
978 "has SCSI Status = %x\n",
981 if (ei->ScsiStatus == 0)
983 "cciss:SCSI status is abnormally zero. "
984 "(probably indicates selection timeout "
985 "reported incorrectly due to a known "
986 "firmware bug, circa July, 2001.)\n");
988 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
989 printk("UNDERRUN\n");
991 case CMD_DATA_OVERRUN:
992 printk(KERN_WARNING "cciss: cp %p has"
993 " completed with data overrun "
997 /* controller unfortunately reports SCSI passthru's */
998 /* to non-existent targets as invalid commands. */
999 printk(KERN_WARNING "cciss: cp %p is "
1000 "reported invalid (probably means "
1001 "target device no longer present)\n",
1003 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1007 case CMD_PROTOCOL_ERR:
1008 printk(KERN_WARNING "cciss: cp %p has "
1009 "protocol error \n", cp);
1011 case CMD_HARDWARE_ERR:
1012 /* cmd->result = DID_ERROR << 16; */
1013 printk(KERN_WARNING "cciss: cp %p had "
1014 " hardware error\n", cp);
1016 case CMD_CONNECTION_LOST:
1017 printk(KERN_WARNING "cciss: cp %p had "
1018 "connection lost\n", cp);
1021 printk(KERN_WARNING "cciss: cp %p was "
1024 case CMD_ABORT_FAILED:
1025 printk(KERN_WARNING "cciss: cp %p reports "
1026 "abort failed\n", cp);
1028 case CMD_UNSOLICITED_ABORT:
1029 printk(KERN_WARNING "cciss: cp %p aborted "
1030 "do to an unsolicited abort\n", cp);
1033 printk(KERN_WARNING "cciss: cp %p timedout\n",
1037 printk(KERN_WARNING "cciss: cp %p returned "
1038 "unknown status %x\n", cp,
1044 cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr,
1045 unsigned char page, unsigned char *buf,
1046 unsigned char bufsize)
1049 CommandList_struct *cp;
1051 ErrorInfo_struct *ei;
1052 unsigned long flags;
1054 spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
1055 cp = scsi_cmd_alloc(c);
1056 spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
1058 if (cp == NULL) { /* trouble... */
1059 printk("cmd_alloc returned NULL!\n");
1065 cdb[0] = CISS_INQUIRY;
1066 cdb[1] = (page != 0);
1071 rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb,
1072 6, buf, bufsize, XFER_READ);
1074 if (rc != 0) return rc; /* something went wrong */
1076 if (ei->CommandStatus != 0 &&
1077 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1078 cciss_scsi_interpret_error(cp);
1081 spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
1082 scsi_cmd_free(c, cp);
1083 spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
1087 /* Get the device id from inquiry page 0x83 */
1088 static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr,
1089 unsigned char *device_id, int buflen)
1096 buf = kzalloc(64, GFP_KERNEL);
1099 rc = cciss_scsi_do_inquiry(c, scsi3addr, 0x83, buf, 64);
1101 memcpy(device_id, &buf[8], buflen);
1107 cciss_scsi_do_report_phys_luns(ctlr_info_t *c,
1108 ReportLunData_struct *buf, int bufsize)
1111 CommandList_struct *cp;
1112 unsigned char cdb[12];
1113 unsigned char scsi3addr[8];
1114 ErrorInfo_struct *ei;
1115 unsigned long flags;
1117 spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
1118 cp = scsi_cmd_alloc(c);
1119 spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
1120 if (cp == NULL) { /* trouble... */
1121 printk("cmd_alloc returned NULL!\n");
1125 memset(&scsi3addr[0], 0, 8); /* address the controller */
1126 cdb[0] = CISS_REPORT_PHYS;
1132 cdb[6] = (bufsize >> 24) & 0xFF; //MSB
1133 cdb[7] = (bufsize >> 16) & 0xFF;
1134 cdb[8] = (bufsize >> 8) & 0xFF;
1135 cdb[9] = bufsize & 0xFF;
1139 rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr,
1141 (unsigned char *) buf,
1142 bufsize, XFER_READ);
1144 if (rc != 0) return rc; /* something went wrong */
1147 if (ei->CommandStatus != 0 &&
1148 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1149 cciss_scsi_interpret_error(cp);
1152 spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
1153 scsi_cmd_free(c, cp);
1154 spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
1159 cciss_update_non_disk_devices(int cntl_num, int hostno)
1161 /* the idea here is we could get notified from /proc
1162 that some devices have changed, so we do a report
1163 physical luns cmd, and adjust our list of devices
1164 accordingly. (We can't rely on the scsi-mid layer just
1165 doing inquiries, because the "busses" that the scsi
1166 mid-layer probes are totally fabricated by this driver,
1167 so new devices wouldn't show up.
1169 the scsi3addr's of devices won't change so long as the
1170 adapter is not reset. That means we can rescan and
1171 tell which devices we already know about, vs. new
1172 devices, vs. disappearing devices.
1174 Also, if you yank out a tape drive, then put in a disk
1175 in it's place, (say, a configured volume from another
1176 array controller for instance) _don't_ poke this driver
1177 (so it thinks it's still a tape, but _do_ poke the scsi
1178 mid layer, so it does an inquiry... the scsi mid layer
1179 will see the physical disk. This would be bad. Need to
1180 think about how to prevent that. One idea would be to
1181 snoop all scsi responses and if an inquiry repsonse comes
1182 back that reports a disk, chuck it an return selection
1183 timeout instead and adjust our table... Not sure i like
1187 #define OBDR_TAPE_INQ_SIZE 49
1188 #define OBDR_TAPE_SIG "$DR-10"
1189 ReportLunData_struct *ld_buff;
1190 unsigned char *inq_buff;
1191 unsigned char scsi3addr[8];
1195 struct cciss_scsi_dev_t *currentsd, *this_device;
1197 int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
1200 c = (ctlr_info_t *) hba[cntl_num];
1201 ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
1202 inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1203 currentsd = kzalloc(sizeof(*currentsd) *
1204 (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL);
1205 if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) {
1206 printk(KERN_ERR "cciss: out of memory\n");
1209 this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
1210 if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) {
1211 ch = &ld_buff->LUNListLength[0];
1212 num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
1213 if (num_luns > CISS_MAX_PHYS_LUN) {
1215 "cciss: Maximum physical LUNs (%d) exceeded. "
1216 "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN,
1217 num_luns - CISS_MAX_PHYS_LUN);
1218 num_luns = CISS_MAX_PHYS_LUN;
1222 printk(KERN_ERR "cciss: Report physical LUNs failed.\n");
1227 /* adjust our table of devices */
1228 for (i = 0; i < num_luns; i++) {
1229 /* for each physical lun, do an inquiry */
1230 if (ld_buff->LUN[i][3] & 0xC0) continue;
1231 memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
1232 memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
1234 if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, 0, inq_buff,
1235 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
1236 /* Inquiry failed (msg printed already) */
1237 continue; /* so we will skip this device. */
1239 this_device->devtype = (inq_buff[0] & 0x1f);
1240 this_device->bus = -1;
1241 this_device->target = -1;
1242 this_device->lun = -1;
1243 memcpy(this_device->scsi3addr, scsi3addr, 8);
1244 memcpy(this_device->vendor, &inq_buff[8],
1245 sizeof(this_device->vendor));
1246 memcpy(this_device->model, &inq_buff[16],
1247 sizeof(this_device->model));
1248 memcpy(this_device->revision, &inq_buff[32],
1249 sizeof(this_device->revision));
1250 memset(this_device->device_id, 0,
1251 sizeof(this_device->device_id));
1252 cciss_scsi_get_device_id(hba[cntl_num], scsi3addr,
1253 this_device->device_id, sizeof(this_device->device_id));
1255 switch (this_device->devtype)
1257 case 0x05: /* CD-ROM */ {
1259 /* We don't *really* support actual CD-ROM devices,
1260 * just this "One Button Disaster Recovery" tape drive
1261 * which temporarily pretends to be a CD-ROM drive.
1262 * So we check that the device is really an OBDR tape
1263 * device by checking for "$DR-10" in bytes 43-48 of
1268 strncpy(obdr_sig, &inq_buff[43], 6);
1270 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1271 /* Not OBDR device, ignore it. */
1274 /* fall through . . . */
1275 case 0x01: /* sequential access, (tape) */
1276 case 0x08: /* medium changer */
1277 if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
1278 printk(KERN_INFO "cciss%d: %s ignored, "
1279 "too many devices.\n", cntl_num,
1280 scsi_device_type(this_device->devtype));
1283 currentsd[ncurrent] = *this_device;
1291 adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent);
1300 is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c
1302 int verb_len = strlen(verb);
1303 if (len >= verb_len && !memcmp(verb,ptr,verb_len))
1310 cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length)
1314 if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
1315 cciss_update_non_disk_devices(ctlr, hostno);
1323 cciss_scsi_proc_info(struct Scsi_Host *sh,
1324 char *buffer, /* data buffer */
1325 char **start, /* where data in buffer starts */
1326 off_t offset, /* offset from start of imaginary file */
1327 int length, /* length of data in buffer */
1328 int func) /* 0 == read, 1 == write */
1331 int buflen, datalen;
1337 ci = (ctlr_info_t *) sh->hostdata[0];
1338 if (ci == NULL) /* This really shouldn't ever happen. */
1341 cntl_num = ci->ctlr; /* Get our index into the hba[] array */
1343 if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */
1344 buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n",
1345 cntl_num, sh->host_no);
1347 /* this information is needed by apps to know which cciss
1348 device corresponds to which scsi host number without
1349 having to open a scsi target device node. The device
1350 information is not a duplicate of /proc/scsi/scsi because
1351 the two may be out of sync due to scsi hotplug, rather
1352 this info is for an app to be able to use to know how to
1353 get them back in sync. */
1355 for (i=0;i<ccissscsi[cntl_num].ndevices;i++) {
1356 struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i];
1357 buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d "
1358 "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1359 sh->host_no, sd->bus, sd->target, sd->lun,
1361 sd->scsi3addr[0], sd->scsi3addr[1],
1362 sd->scsi3addr[2], sd->scsi3addr[3],
1363 sd->scsi3addr[4], sd->scsi3addr[5],
1364 sd->scsi3addr[6], sd->scsi3addr[7]);
1366 datalen = buflen - offset;
1367 if (datalen < 0) { /* they're reading past EOF. */
1369 *start = buffer+buflen;
1371 *start = buffer + offset;
1373 } else /* User is writing to /proc/scsi/cciss*?/?* ... */
1374 return cciss_scsi_user_command(cntl_num, sh->host_no,
1378 /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1379 dma mapping and fills in the scatter gather entries of the
1380 cciss command, cp. */
1382 static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *cp,
1383 struct scsi_cmnd *cmd)
1386 struct scatterlist *sg;
1388 int request_nsgs, i, chained, sg_index;
1389 struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr;
1390 SGDescriptor_struct *curr_sg;
1392 BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1397 request_nsgs = scsi_dma_map(cmd);
1399 scsi_for_each_sg(cmd, sg, request_nsgs, i) {
1400 if (sg_index + 1 == h->max_cmd_sgentries &&
1401 !chained && request_nsgs - i > 1) {
1404 curr_sg = sa->cmd_sg_list[cp->cmdindex];
1406 addr64 = (__u64) sg_dma_address(sg);
1407 len = sg_dma_len(sg);
1408 curr_sg[sg_index].Addr.lower =
1409 (__u32) (addr64 & 0x0FFFFFFFFULL);
1410 curr_sg[sg_index].Addr.upper =
1411 (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1412 curr_sg[sg_index].Len = len;
1413 curr_sg[sg_index].Ext = 0;
1417 cciss_map_sg_chain_block(h, cp,
1418 sa->cmd_sg_list[cp->cmdindex],
1419 (request_nsgs - (h->max_cmd_sgentries - 1)) *
1420 sizeof(SGDescriptor_struct));
1422 /* track how many SG entries we are using */
1423 if (request_nsgs > h->maxSG)
1424 h->maxSG = request_nsgs;
1425 cp->Header.SGTotal = (__u8) request_nsgs + chained;
1426 if (request_nsgs > h->max_cmd_sgentries)
1427 cp->Header.SGList = h->max_cmd_sgentries;
1429 cp->Header.SGList = cp->Header.SGTotal;
1435 cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
1439 unsigned char scsi3addr[8];
1440 CommandList_struct *cp;
1441 unsigned long flags;
1443 // Get the ptr to our adapter structure (hba[i]) out of cmd->host.
1444 // We violate cmd->host privacy here. (Is there another way?)
1445 c = (ctlr_info_t *) cmd->device->host->hostdata[0];
1448 rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id,
1449 cmd->device->lun, scsi3addr);
1451 /* the scsi nexus does not match any that we presented... */
1452 /* pretend to mid layer that we got selection timeout */
1453 cmd->result = DID_NO_CONNECT << 16;
1455 /* we might want to think about registering controller itself
1456 as a processor device on the bus so sg binds to it. */
1460 /* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n",
1461 cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/
1462 // printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel,
1463 // cmd->target, cmd->lun);
1465 /* Ok, we have a reasonable scsi nexus, so send the cmd down, and
1466 see what the device thinks of it. */
1468 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1469 cp = scsi_cmd_alloc(c);
1470 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1471 if (cp == NULL) { /* trouble... */
1472 printk("scsi_cmd_alloc returned NULL!\n");
1473 /* FIXME: next 3 lines are -> BAD! <- */
1474 cmd->result = DID_NO_CONNECT << 16;
1479 // Fill in the command list header
1481 cmd->scsi_done = done; // save this for use by completion code
1483 // save cp in case we have to abort it
1484 cmd->host_scribble = (unsigned char *) cp;
1486 cp->cmd_type = CMD_SCSI;
1488 cp->Header.ReplyQueue = 0; // unused in simple mode
1489 memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1490 cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag
1492 // Fill in the request block...
1494 cp->Request.Timeout = 0;
1495 memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB));
1496 BUG_ON(cmd->cmd_len > sizeof(cp->Request.CDB));
1497 cp->Request.CDBLen = cmd->cmd_len;
1498 memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len);
1499 cp->Request.Type.Type = TYPE_CMD;
1500 cp->Request.Type.Attribute = ATTR_SIMPLE;
1501 switch(cmd->sc_data_direction)
1503 case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break;
1504 case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break;
1505 case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break;
1506 case DMA_BIDIRECTIONAL:
1507 // This can happen if a buggy application does a scsi passthru
1508 // and sets both inlen and outlen to non-zero. ( see
1509 // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1511 cp->Request.Type.Direction = XFER_RSVD;
1512 // This is technically wrong, and cciss controllers should
1513 // reject it with CMD_INVALID, which is the most correct
1514 // response, but non-fibre backends appear to let it
1515 // slide by, and give the same results as if this field
1516 // were set correctly. Either way is acceptable for
1517 // our purposes here.
1522 printk("cciss: unknown data direction: %d\n",
1523 cmd->sc_data_direction);
1527 cciss_scatter_gather(c, cp, cmd);
1529 /* Put the request on the tail of the request queue */
1531 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1535 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1537 /* the cmd'll come back via intr handler in complete_scsi_command() */
1542 cciss_unregister_scsi(int ctlr)
1544 struct cciss_scsi_adapter_data_t *sa;
1545 struct cciss_scsi_cmd_stack_t *stk;
1546 unsigned long flags;
1548 /* we are being forcibly unloaded, and may not refuse. */
1550 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1551 sa = hba[ctlr]->scsi_ctlr;
1552 stk = &sa->cmd_stack;
1554 /* if we weren't ever actually registered, don't unregister */
1555 if (sa->registered) {
1556 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1557 scsi_remove_host(sa->scsi_host);
1558 scsi_host_put(sa->scsi_host);
1559 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1562 /* set scsi_host to NULL so our detect routine will
1563 find us on register */
1564 sa->scsi_host = NULL;
1565 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1566 scsi_cmd_stack_free(ctlr);
1571 cciss_engage_scsi(int ctlr)
1573 struct cciss_scsi_adapter_data_t *sa;
1574 struct cciss_scsi_cmd_stack_t *stk;
1575 unsigned long flags;
1577 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1578 sa = hba[ctlr]->scsi_ctlr;
1579 stk = &sa->cmd_stack;
1581 if (sa->registered) {
1582 printk("cciss%d: SCSI subsystem already engaged.\n", ctlr);
1583 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1587 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1588 cciss_update_non_disk_devices(ctlr, -1);
1589 cciss_scsi_detect(ctlr);
1594 cciss_seq_tape_report(struct seq_file *seq, int ctlr)
1596 unsigned long flags;
1598 CPQ_TAPE_LOCK(ctlr, flags);
1600 "Sequential access devices: %d\n\n",
1601 ccissscsi[ctlr].ndevices);
1602 CPQ_TAPE_UNLOCK(ctlr, flags);
1605 static int wait_for_device_to_become_ready(ctlr_info_t *h,
1606 unsigned char lunaddr[])
1611 CommandList_struct *c;
1613 c = cmd_alloc(h, 1);
1615 printk(KERN_WARNING "cciss%d: out of memory in "
1616 "wait_for_device_to_become_ready.\n", h->ctlr);
1620 /* Send test unit ready until device ready, or give up. */
1621 while (count < 20) {
1623 /* Wait for a bit. do this first, because if we send
1624 * the TUR right away, the reset will just abort it.
1626 schedule_timeout_uninterruptible(waittime);
1629 /* Increase wait time with each try, up to a point. */
1630 if (waittime < (HZ * 30))
1631 waittime = waittime * 2;
1633 /* Send the Test Unit Ready */
1634 rc = fill_cmd(c, TEST_UNIT_READY, h->ctlr, NULL, 0, 0,
1637 rc = sendcmd_withirq_core(h, c, 0);
1639 (void) process_sendcmd_error(h, c);
1644 if (c->err_info->CommandStatus == CMD_SUCCESS)
1647 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1648 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1649 if (c->err_info->SenseInfo[2] == NO_SENSE)
1651 if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) {
1653 asc = c->err_info->SenseInfo[12];
1654 check_for_unit_attention(h, c);
1655 if (asc == POWER_OR_RESET)
1660 printk(KERN_WARNING "cciss%d: Waiting %d secs "
1661 "for device to become ready.\n",
1662 h->ctlr, waittime / HZ);
1663 rc = 1; /* device not ready. */
1667 printk("cciss%d: giving up on device.\n", h->ctlr);
1669 printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr);
1675 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
1676 * complaining. Doing a host- or bus-reset can't do anything good here.
1677 * Despite what it might say in scsi_error.c, there may well be commands
1678 * on the controller, as the cciss driver registers twice, once as a block
1679 * device for the logical drives, and once as a scsi device, for any tape
1680 * drives. So we know there are no commands out on the tape drives, but we
1681 * don't know there are no commands on the controller, and it is likely
1682 * that there probably are, as the cciss block device is most commonly used
1683 * as a boot device (embedded controller on HP/Compaq systems.)
1686 static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
1689 CommandList_struct *cmd_in_trouble;
1690 unsigned char lunaddr[8];
1694 /* find the controller to which the command to be aborted was sent */
1695 c = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1696 if (c == NULL) /* paranoia */
1699 printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr);
1700 /* find the command that's giving us trouble */
1701 cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
1702 if (cmd_in_trouble == NULL) /* paranoia */
1704 memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
1705 /* send a reset to the SCSI LUN which the command was sent to */
1706 rc = sendcmd_withirq(CCISS_RESET_MSG, ctlr, NULL, 0, 0, lunaddr,
1708 if (rc == 0 && wait_for_device_to_become_ready(c, lunaddr) == 0)
1710 printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr);
1714 static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
1717 CommandList_struct *cmd_to_abort;
1718 unsigned char lunaddr[8];
1722 /* find the controller to which the command to be aborted was sent */
1723 c = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1724 if (c == NULL) /* paranoia */
1727 printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", ctlr);
1729 /* find the command to be aborted */
1730 cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
1731 if (cmd_to_abort == NULL) /* paranoia */
1733 memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8);
1734 rc = sendcmd_withirq(CCISS_ABORT_MSG, ctlr, &cmd_to_abort->Header.Tag,
1735 0, 0, lunaddr, TYPE_MSG);
1742 #else /* no CONFIG_CISS_SCSI_TAPE */
1744 /* If no tape support, then these become defined out of existence */
1746 #define cciss_scsi_setup(cntl_num)
1748 #endif /* CONFIG_CISS_SCSI_TAPE */