FRV: Use generic show_interrupts()
[cris-mirror.git] / drivers / block / cciss_scsi.c
blob727d0225b7d049e9f529655c081c513267d248bc
1 /*
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
17 * 02111-1307, USA.
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,
48 size_t size,
49 __u8 page_code, unsigned char *scsi3addr,
50 int cmd_type);
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(
58 struct Scsi_Host *sh,
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_Host *h,
66 struct scsi_cmnd *cmd);
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,
83 .name = "cciss",
84 .proc_name = "cciss",
85 .proc_info = cciss_scsi_proc_info,
86 .queuecommand = cciss_scsi_queue_command,
87 .can_queue = SCSI_CCISS_CAN_QUEUE,
88 .this_id = 7,
89 .cmd_per_lun = 1,
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,
96 #pragma pack(1)
98 #define SCSI_PAD_32 8
99 #define SCSI_PAD_64 8
101 struct cciss_scsi_cmd_stack_elem_t {
102 CommandList_struct cmd;
103 ErrorInfo_struct Err;
104 __u32 busaddr;
105 int cmdindex;
106 u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64];
109 #pragma pack()
111 #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \
112 CCISS_MAX_SCSI_DEVS_PER_HBA + 2)
113 // plus two for init time usage
115 #pragma pack(1)
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;
120 int top;
122 #pragma pack()
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;
128 int registered;
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. */
141 /* use h->lock */
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;
149 u64bit temp64;
151 sa = h->scsi_ctlr;
152 stk = &sa->cmd_stack;
154 if (stk->top < 0)
155 return NULL;
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)); */
170 stk->top--;
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;
181 static void
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. */
185 /* use h->lock */
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;
191 sa = h->scsi_ctlr;
192 stk = &sa->cmd_stack;
193 stk->top++;
194 if (stk->top >= CMD_STACK_SIZE) {
195 dev_err(&h->pdev->dev,
196 "scsi_cmd_free called too many times.\n");
197 BUG();
199 stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c;
202 static int
203 scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
205 int i;
206 struct cciss_scsi_cmd_stack_t *stk;
207 size_t size;
209 sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
210 h->chainsize, CMD_STACK_SIZE);
211 if (!sa->cmd_sg_list && h->chainsize > 0)
212 return -ENOMEM;
214 stk = &sa->cmd_stack;
215 size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
217 /* Check alignment, see cciss_cmd.h near CommandList_struct def. */
218 BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
219 /* pci_alloc_consistent guarantees 32-bit DMA address will be used */
220 stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
221 pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle);
223 if (stk->pool == NULL) {
224 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
225 sa->cmd_sg_list = NULL;
226 return -ENOMEM;
229 for (i=0; i<CMD_STACK_SIZE; i++) {
230 stk->elem[i] = &stk->pool[i];
231 stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle +
232 (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
233 stk->elem[i]->cmdindex = i;
235 stk->top = CMD_STACK_SIZE-1;
236 return 0;
239 static void
240 scsi_cmd_stack_free(ctlr_info_t *h)
242 struct cciss_scsi_adapter_data_t *sa;
243 struct cciss_scsi_cmd_stack_t *stk;
244 size_t size;
246 sa = h->scsi_ctlr;
247 stk = &sa->cmd_stack;
248 if (stk->top != CMD_STACK_SIZE-1) {
249 dev_warn(&h->pdev->dev,
250 "bug: %d scsi commands are still outstanding.\n",
251 CMD_STACK_SIZE - stk->top);
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);
256 stk->pool = NULL;
257 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
260 #if 0
261 static int xmargin=8;
262 static int amargin=60;
264 static void
265 print_bytes (unsigned char *c, int len, int hex, int ascii)
268 int i;
269 unsigned char *x;
271 if (hex)
273 x = c;
274 for (i=0;i<len;i++)
276 if ((i % xmargin) == 0 && i>0) printk("\n");
277 if ((i % xmargin) == 0) printk("0x%04x:", i);
278 printk(" %02x", *x);
279 x++;
281 printk("\n");
283 if (ascii)
285 x = c;
286 for (i=0;i<len;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);
291 else printk(".");
292 x++;
294 printk("\n");
298 static void
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,
332 cp->ErrDesc.Len);
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);
344 #endif
346 static int
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 */
351 int i, found=0;
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;
363 break;
366 return (!found);
368 struct scsi2map {
369 char scsi3addr[8];
370 int bus, target, lun;
373 static int
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 dev_warn(&h->pdev->dev, "Too many devices, "
386 "some will be inaccessible.\n");
387 return -1;
390 bus = target = -1;
391 lun = 0;
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);
400 addr1[4] = 0;
401 for (i = 0; i < n; i++) {
402 sd = &ccissscsi[h->ctlr].dev[i];
403 memcpy(addr2, sd->scsi3addr, 8);
404 addr2[4] = 0;
405 /* differ only in byte 4? */
406 if (memcmp(addr1, addr2, 8) == 0) {
407 bus = sd->bus;
408 target = sd->target;
409 lun = device->scsi3addr[4];
410 break;
415 sd = &ccissscsi[h->ctlr].dev[n];
416 if (lun == 0) {
417 if (find_bus_target_lun(h,
418 &sd->bus, &sd->target, &sd->lun) != 0)
419 return -1;
420 } else {
421 sd->bus = bus;
422 sd->target = target;
423 sd->lun = lun;
425 added[*nadded].bus = sd->bus;
426 added[*nadded].target = sd->target;
427 added[*nadded].lun = sd->lun;
428 (*nadded)++;
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) */
441 if (hostno != -1)
442 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
443 scsi_device_type(sd->devtype), hostno,
444 sd->bus, sd->target, sd->lun);
445 return 0;
448 static void
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 */
453 int i;
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;
461 (*nremoved)++;
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 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
466 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] && \
479 (a)[0] == (b)[0])
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. */
485 unsigned long flags;
486 int i, j;
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--;
495 break;
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;
517 static int
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;
528 unsigned long flags;
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,
534 GFP_KERNEL);
535 removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA,
536 GFP_KERNEL);
538 if (!added || !removed) {
539 dev_warn(&h->pdev->dev,
540 "Out of memory in adjust_cciss_scsi_table\n");
541 goto free_and_out;
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[] */
552 i = 0;
553 nremoved = 0;
554 nadded = 0;
555 while (i < ccissscsi[h->ctlr].ndevices) {
556 csd = &ccissscsi[h->ctlr].dev[i];
557 found=0;
558 for (j=0;j<nsds;j++) {
559 if (SCSI3ADDR_EQ(sd[j].scsi3addr,
560 csd->scsi3addr)) {
561 if (device_is_the_same(&sd[j], csd))
562 found=2;
563 else
564 found=1;
565 break;
569 if (found == 0) { /* device no longer present. */
570 changes++;
571 cciss_scsi_remove_entry(h, hostno, i,
572 removed, &nremoved);
573 /* remove ^^^, hence i not incremented */
574 } else if (found == 1) { /* device is different in some way */
575 changes++;
576 dev_info(&h->pdev->dev,
577 "device c%db%dt%dl%d has changed.\n",
578 hostno, csd->bus, csd->target, csd->lun);
579 cciss_scsi_remove_entry(h, hostno, i,
580 removed, &nremoved);
581 /* remove ^^^, hence i not incremented */
582 if (cciss_scsi_add_entry(h, hostno, &sd[j],
583 added, &nadded) != 0)
584 /* we just removed one, so add can't fail. */
585 BUG();
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,
592 sizeof(csd->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++) {
603 found=0;
604 for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) {
605 csd = &ccissscsi[h->ctlr].dev[j];
606 if (SCSI3ADDR_EQ(sd[i].scsi3addr,
607 csd->scsi3addr)) {
608 if (device_is_the_same(&sd[i], csd))
609 found=2; /* found device */
610 else
611 found=1; /* found a bug. */
612 break;
615 if (!found) {
616 changes++;
617 if (cciss_scsi_add_entry(h, hostno, &sd[i],
618 added, &nadded) != 0)
619 break;
620 } else if (found == 1) {
621 /* should never happen... */
622 changes++;
623 dev_warn(&h->pdev->dev,
624 "device unexpectedly changed\n");
625 /* but if it does happen, we just ignore that device */
628 CPQ_TAPE_UNLOCK(h, 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)
634 goto free_and_out;
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);
641 if (sdev != NULL) {
642 scsi_remove_device(sdev);
643 scsi_device_put(sdev);
644 } else {
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 dev_warn(&h->pdev->dev, "didn't find "
649 "c%db%dt%dl%d\n for removal.",
650 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++) {
657 int rc;
658 rc = scsi_add_device(sh, added[i].bus,
659 added[i].target, added[i].lun);
660 if (rc == 0)
661 continue;
662 dev_warn(&h->pdev->dev, "scsi_add_device "
663 "c%db%dt%dl%d failed, device not added.\n",
664 hostno, added[i].bus, added[i].target, added[i].lun);
665 /* now we have to remove it from ccissscsi, */
666 /* since it didn't get added to scsi mid layer */
667 fixup_botched_add(h, added[i].scsi3addr);
670 free_and_out:
671 kfree(added);
672 kfree(removed);
673 return 0;
676 static int
677 lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr)
679 int i;
680 struct cciss_scsi_dev_t *sd;
681 unsigned long flags;
683 CPQ_TAPE_LOCK(h, flags);
684 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
685 sd = &ccissscsi[h->ctlr].dev[i];
686 if (sd->bus == bus &&
687 sd->target == target &&
688 sd->lun == lun) {
689 memcpy(scsi3addr, &sd->scsi3addr[0], 8);
690 CPQ_TAPE_UNLOCK(h, flags);
691 return 0;
694 CPQ_TAPE_UNLOCK(h, flags);
695 return -1;
698 static void
699 cciss_scsi_setup(ctlr_info_t *h)
701 struct cciss_scsi_adapter_data_t * shba;
703 ccissscsi[h->ctlr].ndevices = 0;
704 shba = (struct cciss_scsi_adapter_data_t *)
705 kmalloc(sizeof(*shba), GFP_KERNEL);
706 if (shba == NULL)
707 return;
708 shba->scsi_host = NULL;
709 spin_lock_init(&shba->lock);
710 shba->registered = 0;
711 if (scsi_cmd_stack_setup(h, shba) != 0) {
712 kfree(shba);
713 shba = NULL;
715 h->scsi_ctlr = shba;
716 return;
719 static void complete_scsi_command(CommandList_struct *c, int timeout,
720 __u32 tag)
722 struct scsi_cmnd *cmd;
723 ctlr_info_t *h;
724 ErrorInfo_struct *ei;
726 ei = c->err_info;
728 /* First, see if it was a message rather than a command */
729 if (c->Request.Type.Type == TYPE_MSG) {
730 c->cmd_type = CMD_MSG_DONE;
731 return;
734 cmd = (struct scsi_cmnd *) c->scsi_cmd;
735 h = hba[c->ctlr];
737 scsi_dma_unmap(cmd);
738 if (c->Header.SGTotal > h->max_cmd_sgentries)
739 cciss_unmap_sg_chain_block(h, c);
741 cmd->result = (DID_OK << 16); /* host byte */
742 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
743 /* cmd->result |= (GOOD < 1); */ /* status byte */
745 cmd->result |= (ei->ScsiStatus);
746 /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */
748 /* copy the sense data whether we need to or not. */
750 memcpy(cmd->sense_buffer, ei->SenseInfo,
751 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
752 SCSI_SENSE_BUFFERSIZE :
753 ei->SenseLen);
754 scsi_set_resid(cmd, ei->ResidualCnt);
756 if(ei->CommandStatus != 0)
757 { /* an error has occurred */
758 switch(ei->CommandStatus)
760 case CMD_TARGET_STATUS:
761 /* Pass it up to the upper layers... */
762 if( ei->ScsiStatus)
764 #if 0
765 printk(KERN_WARNING "cciss: cmd %p "
766 "has SCSI Status = %x\n",
767 c, ei->ScsiStatus);
768 #endif
769 cmd->result |= (ei->ScsiStatus << 1);
771 else { /* scsi status is zero??? How??? */
773 /* Ordinarily, this case should never happen, but there is a bug
774 in some released firmware revisions that allows it to happen
775 if, for example, a 4100 backplane loses power and the tape
776 drive is in it. We assume that it's a fatal error of some
777 kind because we can't show that it wasn't. We will make it
778 look like selection timeout since that is the most common
779 reason for this to occur, and it's severe enough. */
781 cmd->result = DID_NO_CONNECT << 16;
783 break;
784 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
785 break;
786 case CMD_DATA_OVERRUN:
787 dev_warn(&h->pdev->dev, "%p has"
788 " completed with data overrun "
789 "reported\n", c);
790 break;
791 case CMD_INVALID: {
792 /* print_bytes(c, sizeof(*c), 1, 0);
793 print_cmd(c); */
794 /* We get CMD_INVALID if you address a non-existent tape drive instead
795 of a selection timeout (no response). You will see this if you yank
796 out a tape drive, then try to access it. This is kind of a shame
797 because it means that any other CMD_INVALID (e.g. driver bug) will
798 get interpreted as a missing target. */
799 cmd->result = DID_NO_CONNECT << 16;
801 break;
802 case CMD_PROTOCOL_ERR:
803 dev_warn(&h->pdev->dev,
804 "%p has protocol error\n", c);
805 break;
806 case CMD_HARDWARE_ERR:
807 cmd->result = DID_ERROR << 16;
808 dev_warn(&h->pdev->dev,
809 "%p had hardware error\n", c);
810 break;
811 case CMD_CONNECTION_LOST:
812 cmd->result = DID_ERROR << 16;
813 dev_warn(&h->pdev->dev,
814 "%p had connection lost\n", c);
815 break;
816 case CMD_ABORTED:
817 cmd->result = DID_ABORT << 16;
818 dev_warn(&h->pdev->dev, "%p was aborted\n", c);
819 break;
820 case CMD_ABORT_FAILED:
821 cmd->result = DID_ERROR << 16;
822 dev_warn(&h->pdev->dev,
823 "%p reports abort failed\n", c);
824 break;
825 case CMD_UNSOLICITED_ABORT:
826 cmd->result = DID_ABORT << 16;
827 dev_warn(&h->pdev->dev, "%p aborted do to an "
828 "unsolicited abort\n", c);
829 break;
830 case CMD_TIMEOUT:
831 cmd->result = DID_TIME_OUT << 16;
832 dev_warn(&h->pdev->dev, "%p timedout\n", c);
833 break;
834 default:
835 cmd->result = DID_ERROR << 16;
836 dev_warn(&h->pdev->dev,
837 "%p returned unknown status %x\n", c,
838 ei->CommandStatus);
841 cmd->scsi_done(cmd);
842 scsi_cmd_free(h, c);
845 static int
846 cciss_scsi_detect(ctlr_info_t *h)
848 struct Scsi_Host *sh;
849 int error;
851 sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *));
852 if (sh == NULL)
853 goto fail;
854 sh->io_port = 0; // good enough? FIXME,
855 sh->n_io_port = 0; // I don't think we use these two...
856 sh->this_id = SELF_SCSI_ID;
857 sh->sg_tablesize = h->maxsgentries;
858 sh->max_cmd_len = MAX_COMMAND_SIZE;
860 ((struct cciss_scsi_adapter_data_t *)
861 h->scsi_ctlr)->scsi_host = sh;
862 sh->hostdata[0] = (unsigned long) h;
863 sh->irq = h->intr[SIMPLE_MODE_INT];
864 sh->unique_id = sh->irq;
865 error = scsi_add_host(sh, &h->pdev->dev);
866 if (error)
867 goto fail_host_put;
868 scsi_scan_host(sh);
869 return 1;
871 fail_host_put:
872 scsi_host_put(sh);
873 fail:
874 return 0;
877 static void
878 cciss_unmap_one(struct pci_dev *pdev,
879 CommandList_struct *c,
880 size_t buflen,
881 int data_direction)
883 u64bit addr64;
885 addr64.val32.lower = c->SG[0].Addr.lower;
886 addr64.val32.upper = c->SG[0].Addr.upper;
887 pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction);
890 static void
891 cciss_map_one(struct pci_dev *pdev,
892 CommandList_struct *c,
893 unsigned char *buf,
894 size_t buflen,
895 int data_direction)
897 __u64 addr64;
899 addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction);
900 c->SG[0].Addr.lower =
901 (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
902 c->SG[0].Addr.upper =
903 (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
904 c->SG[0].Len = buflen;
905 c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */
906 c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
909 static int
910 cciss_scsi_do_simple_cmd(ctlr_info_t *h,
911 CommandList_struct *c,
912 unsigned char *scsi3addr,
913 unsigned char *cdb,
914 unsigned char cdblen,
915 unsigned char *buf, int bufsize,
916 int direction)
918 DECLARE_COMPLETION_ONSTACK(wait);
920 c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */
921 c->scsi_cmd = NULL;
922 c->Header.ReplyQueue = 0; /* unused in simple mode */
923 memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN));
924 c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */
925 // Fill in the request block...
927 /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n",
928 scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
929 scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */
931 memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
932 memcpy(c->Request.CDB, cdb, cdblen);
933 c->Request.Timeout = 0;
934 c->Request.CDBLen = cdblen;
935 c->Request.Type.Type = TYPE_CMD;
936 c->Request.Type.Attribute = ATTR_SIMPLE;
937 c->Request.Type.Direction = direction;
939 /* Fill in the SG list and do dma mapping */
940 cciss_map_one(h->pdev, c, (unsigned char *) buf,
941 bufsize, DMA_FROM_DEVICE);
943 c->waiting = &wait;
944 enqueue_cmd_and_start_io(h, c);
945 wait_for_completion(&wait);
947 /* undo the dma mapping */
948 cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE);
949 return(0);
952 static void
953 cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c)
955 ErrorInfo_struct *ei;
957 ei = c->err_info;
958 switch(ei->CommandStatus)
960 case CMD_TARGET_STATUS:
961 dev_warn(&h->pdev->dev,
962 "cmd %p has completed with errors\n", c);
963 dev_warn(&h->pdev->dev,
964 "cmd %p has SCSI Status = %x\n",
965 c, ei->ScsiStatus);
966 if (ei->ScsiStatus == 0)
967 dev_warn(&h->pdev->dev,
968 "SCSI status is abnormally zero. "
969 "(probably indicates selection timeout "
970 "reported incorrectly due to a known "
971 "firmware bug, circa July, 2001.)\n");
972 break;
973 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
974 dev_info(&h->pdev->dev, "UNDERRUN\n");
975 break;
976 case CMD_DATA_OVERRUN:
977 dev_warn(&h->pdev->dev, "%p has"
978 " completed with data overrun "
979 "reported\n", c);
980 break;
981 case CMD_INVALID: {
982 /* controller unfortunately reports SCSI passthru's */
983 /* to non-existent targets as invalid commands. */
984 dev_warn(&h->pdev->dev,
985 "%p is reported invalid (probably means "
986 "target device no longer present)\n", c);
987 /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0);
988 print_cmd(c); */
990 break;
991 case CMD_PROTOCOL_ERR:
992 dev_warn(&h->pdev->dev, "%p has protocol error\n", c);
993 break;
994 case CMD_HARDWARE_ERR:
995 /* cmd->result = DID_ERROR << 16; */
996 dev_warn(&h->pdev->dev, "%p had hardware error\n", c);
997 break;
998 case CMD_CONNECTION_LOST:
999 dev_warn(&h->pdev->dev, "%p had connection lost\n", c);
1000 break;
1001 case CMD_ABORTED:
1002 dev_warn(&h->pdev->dev, "%p was aborted\n", c);
1003 break;
1004 case CMD_ABORT_FAILED:
1005 dev_warn(&h->pdev->dev,
1006 "%p reports abort failed\n", c);
1007 break;
1008 case CMD_UNSOLICITED_ABORT:
1009 dev_warn(&h->pdev->dev,
1010 "%p aborted do to an unsolicited abort\n", c);
1011 break;
1012 case CMD_TIMEOUT:
1013 dev_warn(&h->pdev->dev, "%p timedout\n", c);
1014 break;
1015 default:
1016 dev_warn(&h->pdev->dev,
1017 "%p returned unknown status %x\n",
1018 c, ei->CommandStatus);
1022 static int
1023 cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr,
1024 unsigned char page, unsigned char *buf,
1025 unsigned char bufsize)
1027 int rc;
1028 CommandList_struct *c;
1029 char cdb[6];
1030 ErrorInfo_struct *ei;
1031 unsigned long flags;
1033 spin_lock_irqsave(&h->lock, flags);
1034 c = scsi_cmd_alloc(h);
1035 spin_unlock_irqrestore(&h->lock, flags);
1037 if (c == NULL) { /* trouble... */
1038 printk("cmd_alloc returned NULL!\n");
1039 return -1;
1042 ei = c->err_info;
1044 cdb[0] = CISS_INQUIRY;
1045 cdb[1] = (page != 0);
1046 cdb[2] = page;
1047 cdb[3] = 0;
1048 cdb[4] = bufsize;
1049 cdb[5] = 0;
1050 rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb,
1051 6, buf, bufsize, XFER_READ);
1053 if (rc != 0) return rc; /* something went wrong */
1055 if (ei->CommandStatus != 0 &&
1056 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1057 cciss_scsi_interpret_error(h, c);
1058 rc = -1;
1060 spin_lock_irqsave(&h->lock, flags);
1061 scsi_cmd_free(h, c);
1062 spin_unlock_irqrestore(&h->lock, flags);
1063 return rc;
1066 /* Get the device id from inquiry page 0x83 */
1067 static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr,
1068 unsigned char *device_id, int buflen)
1070 int rc;
1071 unsigned char *buf;
1073 if (buflen > 16)
1074 buflen = 16;
1075 buf = kzalloc(64, GFP_KERNEL);
1076 if (!buf)
1077 return -1;
1078 rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1079 if (rc == 0)
1080 memcpy(device_id, &buf[8], buflen);
1081 kfree(buf);
1082 return rc != 0;
1085 static int
1086 cciss_scsi_do_report_phys_luns(ctlr_info_t *h,
1087 ReportLunData_struct *buf, int bufsize)
1089 int rc;
1090 CommandList_struct *c;
1091 unsigned char cdb[12];
1092 unsigned char scsi3addr[8];
1093 ErrorInfo_struct *ei;
1094 unsigned long flags;
1096 spin_lock_irqsave(&h->lock, flags);
1097 c = scsi_cmd_alloc(h);
1098 spin_unlock_irqrestore(&h->lock, flags);
1099 if (c == NULL) { /* trouble... */
1100 printk("cmd_alloc returned NULL!\n");
1101 return -1;
1104 memset(&scsi3addr[0], 0, 8); /* address the controller */
1105 cdb[0] = CISS_REPORT_PHYS;
1106 cdb[1] = 0;
1107 cdb[2] = 0;
1108 cdb[3] = 0;
1109 cdb[4] = 0;
1110 cdb[5] = 0;
1111 cdb[6] = (bufsize >> 24) & 0xFF; //MSB
1112 cdb[7] = (bufsize >> 16) & 0xFF;
1113 cdb[8] = (bufsize >> 8) & 0xFF;
1114 cdb[9] = bufsize & 0xFF;
1115 cdb[10] = 0;
1116 cdb[11] = 0;
1118 rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr,
1119 cdb, 12,
1120 (unsigned char *) buf,
1121 bufsize, XFER_READ);
1123 if (rc != 0) return rc; /* something went wrong */
1125 ei = c->err_info;
1126 if (ei->CommandStatus != 0 &&
1127 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1128 cciss_scsi_interpret_error(h, c);
1129 rc = -1;
1131 spin_lock_irqsave(&h->lock, flags);
1132 scsi_cmd_free(h, c);
1133 spin_unlock_irqrestore(&h->lock, flags);
1134 return rc;
1137 static void
1138 cciss_update_non_disk_devices(ctlr_info_t *h, int hostno)
1140 /* the idea here is we could get notified from /proc
1141 that some devices have changed, so we do a report
1142 physical luns cmd, and adjust our list of devices
1143 accordingly. (We can't rely on the scsi-mid layer just
1144 doing inquiries, because the "busses" that the scsi
1145 mid-layer probes are totally fabricated by this driver,
1146 so new devices wouldn't show up.
1148 the scsi3addr's of devices won't change so long as the
1149 adapter is not reset. That means we can rescan and
1150 tell which devices we already know about, vs. new
1151 devices, vs. disappearing devices.
1153 Also, if you yank out a tape drive, then put in a disk
1154 in it's place, (say, a configured volume from another
1155 array controller for instance) _don't_ poke this driver
1156 (so it thinks it's still a tape, but _do_ poke the scsi
1157 mid layer, so it does an inquiry... the scsi mid layer
1158 will see the physical disk. This would be bad. Need to
1159 think about how to prevent that. One idea would be to
1160 snoop all scsi responses and if an inquiry repsonse comes
1161 back that reports a disk, chuck it an return selection
1162 timeout instead and adjust our table... Not sure i like
1163 that though.
1166 #define OBDR_TAPE_INQ_SIZE 49
1167 #define OBDR_TAPE_SIG "$DR-10"
1168 ReportLunData_struct *ld_buff;
1169 unsigned char *inq_buff;
1170 unsigned char scsi3addr[8];
1171 __u32 num_luns=0;
1172 unsigned char *ch;
1173 struct cciss_scsi_dev_t *currentsd, *this_device;
1174 int ncurrent=0;
1175 int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
1176 int i;
1178 ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
1179 inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1180 currentsd = kzalloc(sizeof(*currentsd) *
1181 (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL);
1182 if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) {
1183 printk(KERN_ERR "cciss: out of memory\n");
1184 goto out;
1186 this_device = &currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
1187 if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) {
1188 ch = &ld_buff->LUNListLength[0];
1189 num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
1190 if (num_luns > CISS_MAX_PHYS_LUN) {
1191 printk(KERN_WARNING
1192 "cciss: Maximum physical LUNs (%d) exceeded. "
1193 "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN,
1194 num_luns - CISS_MAX_PHYS_LUN);
1195 num_luns = CISS_MAX_PHYS_LUN;
1198 else {
1199 printk(KERN_ERR "cciss: Report physical LUNs failed.\n");
1200 goto out;
1204 /* adjust our table of devices */
1205 for (i = 0; i < num_luns; i++) {
1206 /* for each physical lun, do an inquiry */
1207 if (ld_buff->LUN[i][3] & 0xC0) continue;
1208 memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
1209 memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
1211 if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1212 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
1213 /* Inquiry failed (msg printed already) */
1214 continue; /* so we will skip this device. */
1216 this_device->devtype = (inq_buff[0] & 0x1f);
1217 this_device->bus = -1;
1218 this_device->target = -1;
1219 this_device->lun = -1;
1220 memcpy(this_device->scsi3addr, scsi3addr, 8);
1221 memcpy(this_device->vendor, &inq_buff[8],
1222 sizeof(this_device->vendor));
1223 memcpy(this_device->model, &inq_buff[16],
1224 sizeof(this_device->model));
1225 memcpy(this_device->revision, &inq_buff[32],
1226 sizeof(this_device->revision));
1227 memset(this_device->device_id, 0,
1228 sizeof(this_device->device_id));
1229 cciss_scsi_get_device_id(h, scsi3addr,
1230 this_device->device_id, sizeof(this_device->device_id));
1232 switch (this_device->devtype)
1234 case 0x05: /* CD-ROM */ {
1236 /* We don't *really* support actual CD-ROM devices,
1237 * just this "One Button Disaster Recovery" tape drive
1238 * which temporarily pretends to be a CD-ROM drive.
1239 * So we check that the device is really an OBDR tape
1240 * device by checking for "$DR-10" in bytes 43-48 of
1241 * the inquiry data.
1243 char obdr_sig[7];
1245 strncpy(obdr_sig, &inq_buff[43], 6);
1246 obdr_sig[6] = '\0';
1247 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1248 /* Not OBDR device, ignore it. */
1249 break;
1251 /* fall through . . . */
1252 case 0x01: /* sequential access, (tape) */
1253 case 0x08: /* medium changer */
1254 if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
1255 printk(KERN_INFO "cciss%d: %s ignored, "
1256 "too many devices.\n", h->ctlr,
1257 scsi_device_type(this_device->devtype));
1258 break;
1260 currentsd[ncurrent] = *this_device;
1261 ncurrent++;
1262 break;
1263 default:
1264 break;
1268 adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent);
1269 out:
1270 kfree(inq_buff);
1271 kfree(ld_buff);
1272 kfree(currentsd);
1273 return;
1276 static int
1277 is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c
1279 int verb_len = strlen(verb);
1280 if (len >= verb_len && !memcmp(verb,ptr,verb_len))
1281 return verb_len;
1282 else
1283 return 0;
1286 static int
1287 cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length)
1289 int arg_len;
1291 if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
1292 cciss_update_non_disk_devices(h, hostno);
1293 else
1294 return -EINVAL;
1295 return length;
1299 static int
1300 cciss_scsi_proc_info(struct Scsi_Host *sh,
1301 char *buffer, /* data buffer */
1302 char **start, /* where data in buffer starts */
1303 off_t offset, /* offset from start of imaginary file */
1304 int length, /* length of data in buffer */
1305 int func) /* 0 == read, 1 == write */
1308 int buflen, datalen;
1309 ctlr_info_t *h;
1310 int i;
1312 h = (ctlr_info_t *) sh->hostdata[0];
1313 if (h == NULL) /* This really shouldn't ever happen. */
1314 return -EINVAL;
1316 if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */
1317 buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n",
1318 h->ctlr, sh->host_no);
1320 /* this information is needed by apps to know which cciss
1321 device corresponds to which scsi host number without
1322 having to open a scsi target device node. The device
1323 information is not a duplicate of /proc/scsi/scsi because
1324 the two may be out of sync due to scsi hotplug, rather
1325 this info is for an app to be able to use to know how to
1326 get them back in sync. */
1328 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
1329 struct cciss_scsi_dev_t *sd =
1330 &ccissscsi[h->ctlr].dev[i];
1331 buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d "
1332 "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1333 sh->host_no, sd->bus, sd->target, sd->lun,
1334 sd->devtype,
1335 sd->scsi3addr[0], sd->scsi3addr[1],
1336 sd->scsi3addr[2], sd->scsi3addr[3],
1337 sd->scsi3addr[4], sd->scsi3addr[5],
1338 sd->scsi3addr[6], sd->scsi3addr[7]);
1340 datalen = buflen - offset;
1341 if (datalen < 0) { /* they're reading past EOF. */
1342 datalen = 0;
1343 *start = buffer+buflen;
1344 } else
1345 *start = buffer + offset;
1346 return(datalen);
1347 } else /* User is writing to /proc/scsi/cciss*?/?* ... */
1348 return cciss_scsi_user_command(h, sh->host_no,
1349 buffer, length);
1352 /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1353 dma mapping and fills in the scatter gather entries of the
1354 cciss command, c. */
1356 static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c,
1357 struct scsi_cmnd *cmd)
1359 unsigned int len;
1360 struct scatterlist *sg;
1361 __u64 addr64;
1362 int request_nsgs, i, chained, sg_index;
1363 struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr;
1364 SGDescriptor_struct *curr_sg;
1366 BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1368 chained = 0;
1369 sg_index = 0;
1370 curr_sg = c->SG;
1371 request_nsgs = scsi_dma_map(cmd);
1372 if (request_nsgs) {
1373 scsi_for_each_sg(cmd, sg, request_nsgs, i) {
1374 if (sg_index + 1 == h->max_cmd_sgentries &&
1375 !chained && request_nsgs - i > 1) {
1376 chained = 1;
1377 sg_index = 0;
1378 curr_sg = sa->cmd_sg_list[c->cmdindex];
1380 addr64 = (__u64) sg_dma_address(sg);
1381 len = sg_dma_len(sg);
1382 curr_sg[sg_index].Addr.lower =
1383 (__u32) (addr64 & 0x0FFFFFFFFULL);
1384 curr_sg[sg_index].Addr.upper =
1385 (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1386 curr_sg[sg_index].Len = len;
1387 curr_sg[sg_index].Ext = 0;
1388 ++sg_index;
1390 if (chained)
1391 cciss_map_sg_chain_block(h, c,
1392 sa->cmd_sg_list[c->cmdindex],
1393 (request_nsgs - (h->max_cmd_sgentries - 1)) *
1394 sizeof(SGDescriptor_struct));
1396 /* track how many SG entries we are using */
1397 if (request_nsgs > h->maxSG)
1398 h->maxSG = request_nsgs;
1399 c->Header.SGTotal = (__u8) request_nsgs + chained;
1400 if (request_nsgs > h->max_cmd_sgentries)
1401 c->Header.SGList = h->max_cmd_sgentries;
1402 else
1403 c->Header.SGList = c->Header.SGTotal;
1404 return;
1408 static int
1409 cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1411 ctlr_info_t *h;
1412 int rc;
1413 unsigned char scsi3addr[8];
1414 CommandList_struct *c;
1415 unsigned long flags;
1417 // Get the ptr to our adapter structure (hba[i]) out of cmd->host.
1418 // We violate cmd->host privacy here. (Is there another way?)
1419 h = (ctlr_info_t *) cmd->device->host->hostdata[0];
1421 rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id,
1422 cmd->device->lun, scsi3addr);
1423 if (rc != 0) {
1424 /* the scsi nexus does not match any that we presented... */
1425 /* pretend to mid layer that we got selection timeout */
1426 cmd->result = DID_NO_CONNECT << 16;
1427 done(cmd);
1428 /* we might want to think about registering controller itself
1429 as a processor device on the bus so sg binds to it. */
1430 return 0;
1433 /* Ok, we have a reasonable scsi nexus, so send the cmd down, and
1434 see what the device thinks of it. */
1436 spin_lock_irqsave(&h->lock, flags);
1437 c = scsi_cmd_alloc(h);
1438 spin_unlock_irqrestore(&h->lock, flags);
1439 if (c == NULL) { /* trouble... */
1440 dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n");
1441 /* FIXME: next 3 lines are -> BAD! <- */
1442 cmd->result = DID_NO_CONNECT << 16;
1443 done(cmd);
1444 return 0;
1447 // Fill in the command list header
1449 cmd->scsi_done = done; // save this for use by completion code
1451 /* save c in case we have to abort it */
1452 cmd->host_scribble = (unsigned char *) c;
1454 c->cmd_type = CMD_SCSI;
1455 c->scsi_cmd = cmd;
1456 c->Header.ReplyQueue = 0; /* unused in simple mode */
1457 memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1458 c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */
1460 // Fill in the request block...
1462 c->Request.Timeout = 0;
1463 memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1464 BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1465 c->Request.CDBLen = cmd->cmd_len;
1466 memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1467 c->Request.Type.Type = TYPE_CMD;
1468 c->Request.Type.Attribute = ATTR_SIMPLE;
1469 switch(cmd->sc_data_direction)
1471 case DMA_TO_DEVICE:
1472 c->Request.Type.Direction = XFER_WRITE;
1473 break;
1474 case DMA_FROM_DEVICE:
1475 c->Request.Type.Direction = XFER_READ;
1476 break;
1477 case DMA_NONE:
1478 c->Request.Type.Direction = XFER_NONE;
1479 break;
1480 case DMA_BIDIRECTIONAL:
1481 // This can happen if a buggy application does a scsi passthru
1482 // and sets both inlen and outlen to non-zero. ( see
1483 // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1485 c->Request.Type.Direction = XFER_RSVD;
1486 // This is technically wrong, and cciss controllers should
1487 // reject it with CMD_INVALID, which is the most correct
1488 // response, but non-fibre backends appear to let it
1489 // slide by, and give the same results as if this field
1490 // were set correctly. Either way is acceptable for
1491 // our purposes here.
1493 break;
1495 default:
1496 dev_warn(&h->pdev->dev, "unknown data direction: %d\n",
1497 cmd->sc_data_direction);
1498 BUG();
1499 break;
1501 cciss_scatter_gather(h, c, cmd);
1502 enqueue_cmd_and_start_io(h, c);
1503 /* the cmd'll come back via intr handler in complete_scsi_command() */
1504 return 0;
1507 static DEF_SCSI_QCMD(cciss_scsi_queue_command)
1509 static void cciss_unregister_scsi(ctlr_info_t *h)
1511 struct cciss_scsi_adapter_data_t *sa;
1512 struct cciss_scsi_cmd_stack_t *stk;
1513 unsigned long flags;
1515 /* we are being forcibly unloaded, and may not refuse. */
1517 spin_lock_irqsave(&h->lock, flags);
1518 sa = h->scsi_ctlr;
1519 stk = &sa->cmd_stack;
1521 /* if we weren't ever actually registered, don't unregister */
1522 if (sa->registered) {
1523 spin_unlock_irqrestore(&h->lock, flags);
1524 scsi_remove_host(sa->scsi_host);
1525 scsi_host_put(sa->scsi_host);
1526 spin_lock_irqsave(&h->lock, flags);
1529 /* set scsi_host to NULL so our detect routine will
1530 find us on register */
1531 sa->scsi_host = NULL;
1532 spin_unlock_irqrestore(&h->lock, flags);
1533 scsi_cmd_stack_free(h);
1534 kfree(sa);
1537 static int cciss_engage_scsi(ctlr_info_t *h)
1539 struct cciss_scsi_adapter_data_t *sa;
1540 struct cciss_scsi_cmd_stack_t *stk;
1541 unsigned long flags;
1543 spin_lock_irqsave(&h->lock, flags);
1544 sa = h->scsi_ctlr;
1545 stk = &sa->cmd_stack;
1547 if (sa->registered) {
1548 dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n");
1549 spin_unlock_irqrestore(&h->lock, flags);
1550 return -ENXIO;
1552 sa->registered = 1;
1553 spin_unlock_irqrestore(&h->lock, flags);
1554 cciss_update_non_disk_devices(h, -1);
1555 cciss_scsi_detect(h);
1556 return 0;
1559 static void
1560 cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h)
1562 unsigned long flags;
1564 CPQ_TAPE_LOCK(h, flags);
1565 seq_printf(seq,
1566 "Sequential access devices: %d\n\n",
1567 ccissscsi[h->ctlr].ndevices);
1568 CPQ_TAPE_UNLOCK(h, flags);
1571 static int wait_for_device_to_become_ready(ctlr_info_t *h,
1572 unsigned char lunaddr[])
1574 int rc;
1575 int count = 0;
1576 int waittime = HZ;
1577 CommandList_struct *c;
1579 c = cmd_alloc(h);
1580 if (!c) {
1581 dev_warn(&h->pdev->dev, "out of memory in "
1582 "wait_for_device_to_become_ready.\n");
1583 return IO_ERROR;
1586 /* Send test unit ready until device ready, or give up. */
1587 while (count < 20) {
1589 /* Wait for a bit. do this first, because if we send
1590 * the TUR right away, the reset will just abort it.
1592 schedule_timeout_uninterruptible(waittime);
1593 count++;
1595 /* Increase wait time with each try, up to a point. */
1596 if (waittime < (HZ * 30))
1597 waittime = waittime * 2;
1599 /* Send the Test Unit Ready */
1600 rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0,
1601 lunaddr, TYPE_CMD);
1602 if (rc == 0)
1603 rc = sendcmd_withirq_core(h, c, 0);
1605 (void) process_sendcmd_error(h, c);
1607 if (rc != 0)
1608 goto retry_tur;
1610 if (c->err_info->CommandStatus == CMD_SUCCESS)
1611 break;
1613 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1614 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1615 if (c->err_info->SenseInfo[2] == NO_SENSE)
1616 break;
1617 if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) {
1618 unsigned char asc;
1619 asc = c->err_info->SenseInfo[12];
1620 check_for_unit_attention(h, c);
1621 if (asc == POWER_OR_RESET)
1622 break;
1625 retry_tur:
1626 dev_warn(&h->pdev->dev, "Waiting %d secs "
1627 "for device to become ready.\n",
1628 waittime / HZ);
1629 rc = 1; /* device not ready. */
1632 if (rc)
1633 dev_warn(&h->pdev->dev, "giving up on device.\n");
1634 else
1635 dev_warn(&h->pdev->dev, "device is ready.\n");
1637 cmd_free(h, c);
1638 return rc;
1641 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
1642 * complaining. Doing a host- or bus-reset can't do anything good here.
1643 * Despite what it might say in scsi_error.c, there may well be commands
1644 * on the controller, as the cciss driver registers twice, once as a block
1645 * device for the logical drives, and once as a scsi device, for any tape
1646 * drives. So we know there are no commands out on the tape drives, but we
1647 * don't know there are no commands on the controller, and it is likely
1648 * that there probably are, as the cciss block device is most commonly used
1649 * as a boot device (embedded controller on HP/Compaq systems.)
1652 static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
1654 int rc;
1655 CommandList_struct *cmd_in_trouble;
1656 unsigned char lunaddr[8];
1657 ctlr_info_t *h;
1659 /* find the controller to which the command to be aborted was sent */
1660 h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1661 if (h == NULL) /* paranoia */
1662 return FAILED;
1663 dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n");
1664 /* find the command that's giving us trouble */
1665 cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
1666 if (cmd_in_trouble == NULL) /* paranoia */
1667 return FAILED;
1668 memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
1669 /* send a reset to the SCSI LUN which the command was sent to */
1670 rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr,
1671 TYPE_MSG);
1672 if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0)
1673 return SUCCESS;
1674 dev_warn(&h->pdev->dev, "resetting device failed.\n");
1675 return FAILED;
1678 static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
1680 int rc;
1681 CommandList_struct *cmd_to_abort;
1682 unsigned char lunaddr[8];
1683 ctlr_info_t *h;
1685 /* find the controller to which the command to be aborted was sent */
1686 h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1687 if (h == NULL) /* paranoia */
1688 return FAILED;
1689 dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n");
1691 /* find the command to be aborted */
1692 cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
1693 if (cmd_to_abort == NULL) /* paranoia */
1694 return FAILED;
1695 memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8);
1696 rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag,
1697 0, 0, lunaddr, TYPE_MSG);
1698 if (rc == 0)
1699 return SUCCESS;
1700 return FAILED;
1704 #else /* no CONFIG_CISS_SCSI_TAPE */
1706 /* If no tape support, then these become defined out of existence */
1708 #define cciss_scsi_setup(cntl_num)
1710 #endif /* CONFIG_CISS_SCSI_TAPE */