Commit | Line | Data |
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1da177e4 | 1 | /* |
bd4f36d6 MM |
2 | * Disk Array driver for HP Smart Array controllers, SCSI Tape module. |
3 | * (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P. | |
1da177e4 LT |
4 | * |
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 | |
bd4f36d6 | 7 | * the Free Software Foundation; version 2 of the License. |
1da177e4 LT |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
bd4f36d6 MM |
11 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * General Public License for more details. | |
1da177e4 LT |
13 | * |
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 | |
bd4f36d6 MM |
16 | * Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA |
17 | * 02111-1307, USA. | |
1da177e4 LT |
18 | * |
19 | * Questions/Comments/Bugfixes to iss_storagedev@hp.com | |
20 | * | |
21 | * Author: Stephen M. Cameron | |
22 | */ | |
23 | #ifdef CONFIG_CISS_SCSI_TAPE | |
24 | ||
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. */ | |
30 | ||
4e57b681 TS |
31 | #include <linux/timer.h> |
32 | #include <linux/completion.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/string.h> | |
35 | ||
36 | #include <asm/atomic.h> | |
37 | ||
1da177e4 LT |
38 | #include <scsi/scsi_cmnd.h> |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_host.h> | |
1da177e4 LT |
41 | |
42 | #include "cciss_scsi.h" | |
43 | ||
3da8b713 | 44 | #define CCISS_ABORT_MSG 0x00 |
45 | #define CCISS_RESET_MSG 0x01 | |
46 | ||
1da177e4 LT |
47 | /* some prototypes... */ |
48 | static int sendcmd( | |
49 | __u8 cmd, | |
50 | int ctlr, | |
51 | void *buff, | |
52 | size_t size, | |
53 | unsigned int use_unit_num, /* 0: address the controller, | |
54 | 1: address logical volume log_unit, | |
55 | 2: address is in scsi3addr */ | |
56 | unsigned int log_unit, | |
57 | __u8 page_code, | |
58 | unsigned char *scsi3addr, | |
59 | int cmd_type); | |
60 | ||
88f627ae SC |
61 | static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, |
62 | size_t size, | |
63 | unsigned int use_unit_num, /* 0: address the controller, | |
64 | 1: address logical volume log_unit, | |
65 | 2: periph device address is scsi3addr */ | |
66 | unsigned int log_unit, __u8 page_code, unsigned char *scsi3addr, | |
67 | int cmd_type); | |
68 | ||
69 | static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c); | |
70 | ||
71 | static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool); | |
72 | static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool); | |
1da177e4 LT |
73 | |
74 | static int cciss_scsi_proc_info( | |
75 | struct Scsi_Host *sh, | |
76 | char *buffer, /* data buffer */ | |
77 | char **start, /* where data in buffer starts */ | |
78 | off_t offset, /* offset from start of imaginary file */ | |
79 | int length, /* length of data in buffer */ | |
80 | int func); /* 0 == read, 1 == write */ | |
81 | ||
82 | static int cciss_scsi_queue_command (struct scsi_cmnd *cmd, | |
83 | void (* done)(struct scsi_cmnd *)); | |
3da8b713 | 84 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *); |
85 | static int cciss_eh_abort_handler(struct scsi_cmnd *); | |
1da177e4 LT |
86 | |
87 | static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { | |
88 | { .name = "cciss0", .ndevices = 0 }, | |
89 | { .name = "cciss1", .ndevices = 0 }, | |
90 | { .name = "cciss2", .ndevices = 0 }, | |
91 | { .name = "cciss3", .ndevices = 0 }, | |
92 | { .name = "cciss4", .ndevices = 0 }, | |
93 | { .name = "cciss5", .ndevices = 0 }, | |
94 | { .name = "cciss6", .ndevices = 0 }, | |
95 | { .name = "cciss7", .ndevices = 0 }, | |
96 | }; | |
97 | ||
98 | static struct scsi_host_template cciss_driver_template = { | |
99 | .module = THIS_MODULE, | |
100 | .name = "cciss", | |
101 | .proc_name = "cciss", | |
102 | .proc_info = cciss_scsi_proc_info, | |
103 | .queuecommand = cciss_scsi_queue_command, | |
104 | .can_queue = SCSI_CCISS_CAN_QUEUE, | |
105 | .this_id = 7, | |
106 | .sg_tablesize = MAXSGENTRIES, | |
107 | .cmd_per_lun = 1, | |
108 | .use_clustering = DISABLE_CLUSTERING, | |
3da8b713 | 109 | /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ |
110 | .eh_device_reset_handler= cciss_eh_device_reset_handler, | |
111 | .eh_abort_handler = cciss_eh_abort_handler, | |
1da177e4 LT |
112 | }; |
113 | ||
114 | #pragma pack(1) | |
115 | struct cciss_scsi_cmd_stack_elem_t { | |
116 | CommandList_struct cmd; | |
117 | ErrorInfo_struct Err; | |
118 | __u32 busaddr; | |
33079b21 | 119 | __u32 pad; |
1da177e4 LT |
120 | }; |
121 | ||
122 | #pragma pack() | |
123 | ||
124 | #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \ | |
125 | CCISS_MAX_SCSI_DEVS_PER_HBA + 2) | |
126 | // plus two for init time usage | |
127 | ||
128 | #pragma pack(1) | |
129 | struct cciss_scsi_cmd_stack_t { | |
130 | struct cciss_scsi_cmd_stack_elem_t *pool; | |
131 | struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE]; | |
132 | dma_addr_t cmd_pool_handle; | |
133 | int top; | |
134 | }; | |
135 | #pragma pack() | |
136 | ||
137 | struct cciss_scsi_adapter_data_t { | |
138 | struct Scsi_Host *scsi_host; | |
139 | struct cciss_scsi_cmd_stack_t cmd_stack; | |
140 | int registered; | |
141 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
142 | }; | |
143 | ||
144 | #define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \ | |
145 | &(((struct cciss_scsi_adapter_data_t *) \ | |
146 | hba[ctlr]->scsi_ctlr)->lock), flags); | |
147 | #define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \ | |
148 | &(((struct cciss_scsi_adapter_data_t *) \ | |
149 | hba[ctlr]->scsi_ctlr)->lock), flags); | |
150 | ||
151 | static CommandList_struct * | |
152 | scsi_cmd_alloc(ctlr_info_t *h) | |
153 | { | |
154 | /* assume only one process in here at a time, locking done by caller. */ | |
155 | /* use CCISS_LOCK(ctlr) */ | |
156 | /* might be better to rewrite how we allocate scsi commands in a way that */ | |
157 | /* needs no locking at all. */ | |
158 | ||
159 | /* take the top memory chunk off the stack and return it, if any. */ | |
160 | struct cciss_scsi_cmd_stack_elem_t *c; | |
161 | struct cciss_scsi_adapter_data_t *sa; | |
162 | struct cciss_scsi_cmd_stack_t *stk; | |
163 | u64bit temp64; | |
164 | ||
165 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; | |
166 | stk = &sa->cmd_stack; | |
167 | ||
168 | if (stk->top < 0) | |
169 | return NULL; | |
170 | c = stk->elem[stk->top]; | |
171 | /* memset(c, 0, sizeof(*c)); */ | |
172 | memset(&c->cmd, 0, sizeof(c->cmd)); | |
173 | memset(&c->Err, 0, sizeof(c->Err)); | |
174 | /* set physical addr of cmd and addr of scsi parameters */ | |
175 | c->cmd.busaddr = c->busaddr; | |
176 | /* (__u32) (stk->cmd_pool_handle + | |
177 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ | |
178 | ||
179 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); | |
180 | /* (__u64) (stk->cmd_pool_handle + | |
181 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + | |
182 | sizeof(CommandList_struct)); */ | |
183 | stk->top--; | |
184 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; | |
185 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; | |
186 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); | |
187 | ||
188 | c->cmd.ctlr = h->ctlr; | |
189 | c->cmd.err_info = &c->Err; | |
190 | ||
191 | return (CommandList_struct *) c; | |
192 | } | |
193 | ||
194 | static void | |
195 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd) | |
196 | { | |
197 | /* assume only one process in here at a time, locking done by caller. */ | |
198 | /* use CCISS_LOCK(ctlr) */ | |
199 | /* drop the free memory chunk on top of the stack. */ | |
200 | ||
201 | struct cciss_scsi_adapter_data_t *sa; | |
202 | struct cciss_scsi_cmd_stack_t *stk; | |
203 | ||
204 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; | |
205 | stk = &sa->cmd_stack; | |
206 | if (stk->top >= CMD_STACK_SIZE) { | |
207 | printk("cciss: scsi_cmd_free called too many times.\n"); | |
208 | BUG(); | |
209 | } | |
210 | stk->top++; | |
211 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd; | |
212 | } | |
213 | ||
214 | static int | |
215 | scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa) | |
216 | { | |
217 | int i; | |
218 | struct cciss_scsi_cmd_stack_t *stk; | |
219 | size_t size; | |
220 | ||
221 | stk = &sa->cmd_stack; | |
222 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
223 | ||
224 | // pci_alloc_consistent guarantees 32-bit DMA address will | |
225 | // be used | |
226 | ||
227 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) | |
228 | pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle); | |
229 | ||
230 | if (stk->pool == NULL) { | |
231 | printk("stk->pool is null\n"); | |
232 | return -1; | |
233 | } | |
234 | ||
235 | for (i=0; i<CMD_STACK_SIZE; i++) { | |
236 | stk->elem[i] = &stk->pool[i]; | |
237 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
238 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
239 | } | |
240 | stk->top = CMD_STACK_SIZE-1; | |
241 | return 0; | |
242 | } | |
243 | ||
244 | static void | |
245 | scsi_cmd_stack_free(int ctlr) | |
246 | { | |
247 | struct cciss_scsi_adapter_data_t *sa; | |
248 | struct cciss_scsi_cmd_stack_t *stk; | |
249 | size_t size; | |
250 | ||
251 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
252 | stk = &sa->cmd_stack; | |
253 | if (stk->top != CMD_STACK_SIZE-1) { | |
254 | printk( "cciss: %d scsi commands are still outstanding.\n", | |
255 | CMD_STACK_SIZE - stk->top); | |
256 | // BUG(); | |
257 | printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk); | |
258 | } | |
259 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
260 | ||
261 | pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle); | |
262 | stk->pool = NULL; | |
263 | } | |
264 | ||
400bb236 | 265 | #if 0 |
1da177e4 LT |
266 | static int xmargin=8; |
267 | static int amargin=60; | |
268 | ||
269 | static void | |
270 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
271 | { | |
272 | ||
273 | int i; | |
274 | unsigned char *x; | |
275 | ||
276 | if (hex) | |
277 | { | |
278 | x = c; | |
279 | for (i=0;i<len;i++) | |
280 | { | |
281 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
282 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
283 | printk(" %02x", *x); | |
284 | x++; | |
285 | } | |
286 | printk("\n"); | |
287 | } | |
288 | if (ascii) | |
289 | { | |
290 | x = c; | |
291 | for (i=0;i<len;i++) | |
292 | { | |
293 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
294 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
295 | if (*x > 26 && *x < 128) printk("%c", *x); | |
296 | else printk("."); | |
297 | x++; | |
298 | } | |
299 | printk("\n"); | |
300 | } | |
301 | } | |
302 | ||
303 | static void | |
304 | print_cmd(CommandList_struct *cp) | |
305 | { | |
306 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
307 | printk("sglist:%d\n", cp->Header.SGList); | |
308 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
309 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
310 | cp->Header.Tag.lower); | |
311 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
312 | cp->Header.LUN.LunAddrBytes[0], | |
313 | cp->Header.LUN.LunAddrBytes[1], | |
314 | cp->Header.LUN.LunAddrBytes[2], | |
315 | cp->Header.LUN.LunAddrBytes[3], | |
316 | cp->Header.LUN.LunAddrBytes[4], | |
317 | cp->Header.LUN.LunAddrBytes[5], | |
318 | cp->Header.LUN.LunAddrBytes[6], | |
319 | cp->Header.LUN.LunAddrBytes[7]); | |
320 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
321 | printk("Type:%d\n",cp->Request.Type.Type); | |
322 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
323 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
324 | printk("Timeout:%d\n",cp->Request.Timeout); | |
325 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
326 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
327 | cp->Request.CDB[0], cp->Request.CDB[1], | |
328 | cp->Request.CDB[2], cp->Request.CDB[3], | |
329 | cp->Request.CDB[4], cp->Request.CDB[5], | |
330 | cp->Request.CDB[6], cp->Request.CDB[7], | |
331 | cp->Request.CDB[8], cp->Request.CDB[9], | |
332 | cp->Request.CDB[10], cp->Request.CDB[11], | |
333 | cp->Request.CDB[12], cp->Request.CDB[13], | |
334 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
335 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
336 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
337 | cp->ErrDesc.Len); | |
338 | printk("sgs..........Errorinfo:\n"); | |
339 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
340 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
341 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
342 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
343 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
344 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
345 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
346 | ||
347 | } | |
348 | ||
349 | #endif | |
350 | ||
351 | static int | |
352 | find_bus_target_lun(int ctlr, int *bus, int *target, int *lun) | |
353 | { | |
354 | /* finds an unused bus, target, lun for a new device */ | |
355 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
356 | int i, found=0; | |
357 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
358 | ||
359 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
360 | ||
361 | target_taken[SELF_SCSI_ID] = 1; | |
362 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) | |
363 | target_taken[ccissscsi[ctlr].dev[i].target] = 1; | |
364 | ||
365 | for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) { | |
366 | if (!target_taken[i]) { | |
367 | *bus = 0; *target=i; *lun = 0; found=1; | |
368 | break; | |
369 | } | |
370 | } | |
371 | return (!found); | |
372 | } | |
f4a93bcd MM |
373 | struct scsi2map { |
374 | char scsi3addr[8]; | |
375 | int bus, target, lun; | |
376 | }; | |
1da177e4 LT |
377 | |
378 | static int | |
379 | cciss_scsi_add_entry(int ctlr, int hostno, | |
905bd78f | 380 | struct cciss_scsi_dev_t *device, |
f4a93bcd | 381 | struct scsi2map *added, int *nadded) |
1da177e4 LT |
382 | { |
383 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
384 | int n = ccissscsi[ctlr].ndevices; | |
385 | struct cciss_scsi_dev_t *sd; | |
935dc8d7 MM |
386 | int i, bus, target, lun; |
387 | unsigned char addr1[8], addr2[8]; | |
1da177e4 LT |
388 | |
389 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
390 | printk("cciss%d: Too many devices, " | |
391 | "some will be inaccessible.\n", ctlr); | |
392 | return -1; | |
393 | } | |
f4a93bcd | 394 | |
935dc8d7 MM |
395 | bus = target = -1; |
396 | lun = 0; | |
397 | /* Is this device a non-zero lun of a multi-lun device */ | |
398 | /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ | |
905bd78f | 399 | if (device->scsi3addr[4] != 0) { |
935dc8d7 MM |
400 | /* Search through our list and find the device which */ |
401 | /* has the same 8 byte LUN address, excepting byte 4. */ | |
402 | /* Assign the same bus and target for this new LUN. */ | |
403 | /* Use the logical unit number from the firmware. */ | |
905bd78f | 404 | memcpy(addr1, device->scsi3addr, 8); |
935dc8d7 MM |
405 | addr1[4] = 0; |
406 | for (i = 0; i < n; i++) { | |
407 | sd = &ccissscsi[ctlr].dev[i]; | |
408 | memcpy(addr2, sd->scsi3addr, 8); | |
409 | addr2[4] = 0; | |
410 | /* differ only in byte 4? */ | |
411 | if (memcmp(addr1, addr2, 8) == 0) { | |
412 | bus = sd->bus; | |
413 | target = sd->target; | |
905bd78f | 414 | lun = device->scsi3addr[4]; |
935dc8d7 MM |
415 | break; |
416 | } | |
417 | } | |
418 | } | |
419 | ||
420 | sd = &ccissscsi[ctlr].dev[n]; | |
421 | if (lun == 0) { | |
422 | if (find_bus_target_lun(ctlr, | |
423 | &sd->bus, &sd->target, &sd->lun) != 0) | |
424 | return -1; | |
425 | } else { | |
426 | sd->bus = bus; | |
427 | sd->target = target; | |
428 | sd->lun = lun; | |
429 | } | |
f4a93bcd MM |
430 | added[*nadded].bus = sd->bus; |
431 | added[*nadded].target = sd->target; | |
432 | added[*nadded].lun = sd->lun; | |
433 | (*nadded)++; | |
434 | ||
905bd78f | 435 | memcpy(sd->scsi3addr, device->scsi3addr, 8); |
436 | memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); | |
437 | memcpy(sd->revision, device->revision, sizeof(sd->revision)); | |
438 | memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); | |
439 | sd->devtype = device->devtype; | |
440 | ||
1da177e4 LT |
441 | ccissscsi[ctlr].ndevices++; |
442 | ||
443 | /* initially, (before registering with scsi layer) we don't | |
444 | know our hostno and we don't want to print anything first | |
445 | time anyway (the scsi layer's inquiries will show that info) */ | |
446 | if (hostno != -1) | |
447 | printk("cciss%d: %s device c%db%dt%dl%d added.\n", | |
4ff36718 | 448 | ctlr, scsi_device_type(sd->devtype), hostno, |
1da177e4 LT |
449 | sd->bus, sd->target, sd->lun); |
450 | return 0; | |
451 | } | |
452 | ||
453 | static void | |
f4a93bcd MM |
454 | cciss_scsi_remove_entry(int ctlr, int hostno, int entry, |
455 | struct scsi2map *removed, int *nremoved) | |
1da177e4 LT |
456 | { |
457 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
458 | int i; | |
459 | struct cciss_scsi_dev_t sd; | |
460 | ||
461 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
462 | sd = ccissscsi[ctlr].dev[entry]; | |
f4a93bcd MM |
463 | removed[*nremoved].bus = sd.bus; |
464 | removed[*nremoved].target = sd.target; | |
465 | removed[*nremoved].lun = sd.lun; | |
466 | (*nremoved)++; | |
1da177e4 LT |
467 | for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++) |
468 | ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1]; | |
469 | ccissscsi[ctlr].ndevices--; | |
470 | printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
4ff36718 | 471 | ctlr, scsi_device_type(sd.devtype), hostno, |
1da177e4 LT |
472 | sd.bus, sd.target, sd.lun); |
473 | } | |
474 | ||
475 | ||
476 | #define SCSI3ADDR_EQ(a,b) ( \ | |
477 | (a)[7] == (b)[7] && \ | |
478 | (a)[6] == (b)[6] && \ | |
479 | (a)[5] == (b)[5] && \ | |
480 | (a)[4] == (b)[4] && \ | |
481 | (a)[3] == (b)[3] && \ | |
482 | (a)[2] == (b)[2] && \ | |
483 | (a)[1] == (b)[1] && \ | |
484 | (a)[0] == (b)[0]) | |
485 | ||
f4a93bcd MM |
486 | static void fixup_botched_add(int ctlr, char *scsi3addr) |
487 | { | |
488 | /* called when scsi_add_device fails in order to re-adjust */ | |
489 | /* ccissscsi[] to match the mid layer's view. */ | |
490 | unsigned long flags; | |
491 | int i, j; | |
492 | CPQ_TAPE_LOCK(ctlr, flags); | |
493 | for (i = 0; i < ccissscsi[ctlr].ndevices; i++) { | |
494 | if (memcmp(scsi3addr, | |
495 | ccissscsi[ctlr].dev[i].scsi3addr, 8) == 0) { | |
496 | for (j = i; j < ccissscsi[ctlr].ndevices-1; j++) | |
497 | ccissscsi[ctlr].dev[j] = | |
498 | ccissscsi[ctlr].dev[j+1]; | |
499 | ccissscsi[ctlr].ndevices--; | |
500 | break; | |
501 | } | |
502 | } | |
503 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
504 | } | |
505 | ||
905bd78f | 506 | static int device_is_the_same(struct cciss_scsi_dev_t *dev1, |
507 | struct cciss_scsi_dev_t *dev2) | |
508 | { | |
509 | return dev1->devtype == dev2->devtype && | |
510 | memcmp(dev1->scsi3addr, dev2->scsi3addr, | |
511 | sizeof(dev1->scsi3addr)) == 0 && | |
512 | memcmp(dev1->device_id, dev2->device_id, | |
513 | sizeof(dev1->device_id)) == 0 && | |
514 | memcmp(dev1->vendor, dev2->vendor, | |
515 | sizeof(dev1->vendor)) == 0 && | |
516 | memcmp(dev1->model, dev2->model, | |
517 | sizeof(dev1->model)) == 0 && | |
518 | memcmp(dev1->revision, dev2->revision, | |
519 | sizeof(dev1->revision)) == 0; | |
520 | } | |
521 | ||
1da177e4 LT |
522 | static int |
523 | adjust_cciss_scsi_table(int ctlr, int hostno, | |
524 | struct cciss_scsi_dev_t sd[], int nsds) | |
525 | { | |
526 | /* sd contains scsi3 addresses and devtypes, but | |
527 | bus target and lun are not filled in. This funciton | |
528 | takes what's in sd to be the current and adjusts | |
529 | ccissscsi[] to be in line with what's in sd. */ | |
530 | ||
531 | int i,j, found, changes=0; | |
532 | struct cciss_scsi_dev_t *csd; | |
533 | unsigned long flags; | |
f4a93bcd MM |
534 | struct scsi2map *added, *removed; |
535 | int nadded, nremoved; | |
536 | struct Scsi_Host *sh = NULL; | |
537 | ||
538 | added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
539 | GFP_KERNEL); | |
540 | removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
541 | GFP_KERNEL); | |
542 | ||
543 | if (!added || !removed) { | |
544 | printk(KERN_WARNING "cciss%d: Out of memory in " | |
545 | "adjust_cciss_scsi_table\n", ctlr); | |
546 | goto free_and_out; | |
547 | } | |
1da177e4 LT |
548 | |
549 | CPQ_TAPE_LOCK(ctlr, flags); | |
550 | ||
f4a93bcd MM |
551 | if (hostno != -1) /* if it's not the first time... */ |
552 | sh = ((struct cciss_scsi_adapter_data_t *) | |
553 | hba[ctlr]->scsi_ctlr)->scsi_host; | |
554 | ||
1da177e4 LT |
555 | /* find any devices in ccissscsi[] that are not in |
556 | sd[] and remove them from ccissscsi[] */ | |
557 | ||
558 | i = 0; | |
f4a93bcd MM |
559 | nremoved = 0; |
560 | nadded = 0; | |
1da177e4 LT |
561 | while(i<ccissscsi[ctlr].ndevices) { |
562 | csd = &ccissscsi[ctlr].dev[i]; | |
563 | found=0; | |
564 | for (j=0;j<nsds;j++) { | |
565 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
566 | csd->scsi3addr)) { | |
905bd78f | 567 | if (device_is_the_same(&sd[j], csd)) |
1da177e4 LT |
568 | found=2; |
569 | else | |
570 | found=1; | |
571 | break; | |
572 | } | |
573 | } | |
574 | ||
575 | if (found == 0) { /* device no longer present. */ | |
576 | changes++; | |
577 | /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
4ff36718 | 578 | ctlr, scsi_device_type(csd->devtype), hostno, |
1da177e4 | 579 | csd->bus, csd->target, csd->lun); */ |
f4a93bcd MM |
580 | cciss_scsi_remove_entry(ctlr, hostno, i, |
581 | removed, &nremoved); | |
582 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 583 | } else if (found == 1) { /* device is different in some way */ |
1da177e4 | 584 | changes++; |
905bd78f | 585 | printk("cciss%d: device c%db%dt%dl%d has changed.\n", |
586 | ctlr, hostno, csd->bus, csd->target, csd->lun); | |
f4a93bcd MM |
587 | cciss_scsi_remove_entry(ctlr, hostno, i, |
588 | removed, &nremoved); | |
589 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 590 | if (cciss_scsi_add_entry(ctlr, hostno, &sd[j], |
f4a93bcd MM |
591 | added, &nadded) != 0) |
592 | /* we just removed one, so add can't fail. */ | |
593 | BUG(); | |
1da177e4 | 594 | csd->devtype = sd[j].devtype; |
905bd78f | 595 | memcpy(csd->device_id, sd[j].device_id, |
596 | sizeof(csd->device_id)); | |
597 | memcpy(csd->vendor, sd[j].vendor, | |
598 | sizeof(csd->vendor)); | |
599 | memcpy(csd->model, sd[j].model, | |
600 | sizeof(csd->model)); | |
601 | memcpy(csd->revision, sd[j].revision, | |
602 | sizeof(csd->revision)); | |
1da177e4 LT |
603 | } else /* device is same as it ever was, */ |
604 | i++; /* so just move along. */ | |
605 | } | |
606 | ||
607 | /* Now, make sure every device listed in sd[] is also | |
608 | listed in ccissscsi[], adding them if they aren't found */ | |
609 | ||
610 | for (i=0;i<nsds;i++) { | |
611 | found=0; | |
612 | for (j=0;j<ccissscsi[ctlr].ndevices;j++) { | |
613 | csd = &ccissscsi[ctlr].dev[j]; | |
614 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, | |
615 | csd->scsi3addr)) { | |
905bd78f | 616 | if (device_is_the_same(&sd[i], csd)) |
1da177e4 LT |
617 | found=2; /* found device */ |
618 | else | |
619 | found=1; /* found a bug. */ | |
620 | break; | |
621 | } | |
622 | } | |
623 | if (!found) { | |
624 | changes++; | |
905bd78f | 625 | if (cciss_scsi_add_entry(ctlr, hostno, &sd[i], |
f4a93bcd | 626 | added, &nadded) != 0) |
1da177e4 LT |
627 | break; |
628 | } else if (found == 1) { | |
629 | /* should never happen... */ | |
630 | changes++; | |
905bd78f | 631 | printk(KERN_WARNING "cciss%d: device " |
632 | "unexpectedly changed\n", ctlr); | |
1da177e4 LT |
633 | /* but if it does happen, we just ignore that device */ |
634 | } | |
635 | } | |
636 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
637 | ||
f4a93bcd MM |
638 | /* Don't notify scsi mid layer of any changes the first time through */ |
639 | /* (or if there are no changes) scsi_scan_host will do it later the */ | |
640 | /* first time through. */ | |
641 | if (hostno == -1 || !changes) | |
642 | goto free_and_out; | |
643 | ||
644 | /* Notify scsi mid layer of any removed devices */ | |
645 | for (i = 0; i < nremoved; i++) { | |
646 | struct scsi_device *sdev = | |
647 | scsi_device_lookup(sh, removed[i].bus, | |
648 | removed[i].target, removed[i].lun); | |
649 | if (sdev != NULL) { | |
650 | scsi_remove_device(sdev); | |
651 | scsi_device_put(sdev); | |
652 | } else { | |
653 | /* We don't expect to get here. */ | |
654 | /* future cmds to this device will get selection */ | |
655 | /* timeout as if the device was gone. */ | |
656 | printk(KERN_WARNING "cciss%d: didn't find " | |
657 | "c%db%dt%dl%d\n for removal.", | |
658 | ctlr, hostno, removed[i].bus, | |
659 | removed[i].target, removed[i].lun); | |
660 | } | |
661 | } | |
662 | ||
663 | /* Notify scsi mid layer of any added devices */ | |
664 | for (i = 0; i < nadded; i++) { | |
665 | int rc; | |
666 | rc = scsi_add_device(sh, added[i].bus, | |
667 | added[i].target, added[i].lun); | |
668 | if (rc == 0) | |
669 | continue; | |
670 | printk(KERN_WARNING "cciss%d: scsi_add_device " | |
671 | "c%db%dt%dl%d failed, device not added.\n", | |
672 | ctlr, hostno, | |
673 | added[i].bus, added[i].target, added[i].lun); | |
674 | /* now we have to remove it from ccissscsi, */ | |
675 | /* since it didn't get added to scsi mid layer */ | |
676 | fixup_botched_add(ctlr, added[i].scsi3addr); | |
677 | } | |
1da177e4 | 678 | |
f4a93bcd MM |
679 | free_and_out: |
680 | kfree(added); | |
681 | kfree(removed); | |
1da177e4 LT |
682 | return 0; |
683 | } | |
684 | ||
685 | static int | |
686 | lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr) | |
687 | { | |
688 | int i; | |
689 | struct cciss_scsi_dev_t *sd; | |
690 | unsigned long flags; | |
691 | ||
692 | CPQ_TAPE_LOCK(ctlr, flags); | |
693 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) { | |
694 | sd = &ccissscsi[ctlr].dev[i]; | |
695 | if (sd->bus == bus && | |
696 | sd->target == target && | |
697 | sd->lun == lun) { | |
698 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
699 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
700 | return 0; | |
701 | } | |
702 | } | |
703 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
704 | return -1; | |
705 | } | |
706 | ||
707 | static void | |
708 | cciss_scsi_setup(int cntl_num) | |
709 | { | |
710 | struct cciss_scsi_adapter_data_t * shba; | |
711 | ||
712 | ccissscsi[cntl_num].ndevices = 0; | |
713 | shba = (struct cciss_scsi_adapter_data_t *) | |
714 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
715 | if (shba == NULL) | |
716 | return; | |
717 | shba->scsi_host = NULL; | |
718 | spin_lock_init(&shba->lock); | |
719 | shba->registered = 0; | |
720 | if (scsi_cmd_stack_setup(cntl_num, shba) != 0) { | |
721 | kfree(shba); | |
722 | shba = NULL; | |
723 | } | |
724 | hba[cntl_num]->scsi_ctlr = (void *) shba; | |
725 | return; | |
726 | } | |
727 | ||
728 | static void | |
729 | complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag) | |
730 | { | |
731 | struct scsi_cmnd *cmd; | |
732 | ctlr_info_t *ctlr; | |
1da177e4 LT |
733 | ErrorInfo_struct *ei; |
734 | ||
735 | ei = cp->err_info; | |
736 | ||
737 | /* First, see if it was a message rather than a command */ | |
738 | if (cp->Request.Type.Type == TYPE_MSG) { | |
739 | cp->cmd_type = CMD_MSG_DONE; | |
740 | return; | |
741 | } | |
742 | ||
743 | cmd = (struct scsi_cmnd *) cp->scsi_cmd; | |
744 | ctlr = hba[cp->ctlr]; | |
745 | ||
41ce639a | 746 | scsi_dma_unmap(cmd); |
1da177e4 LT |
747 | |
748 | cmd->result = (DID_OK << 16); /* host byte */ | |
749 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
750 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
751 | ||
752 | cmd->result |= (ei->ScsiStatus); | |
753 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
754 | ||
755 | /* copy the sense data whether we need to or not. */ | |
756 | ||
757 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
758 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
759 | SCSI_SENSE_BUFFERSIZE : | |
760 | ei->SenseLen); | |
41ce639a | 761 | scsi_set_resid(cmd, ei->ResidualCnt); |
1da177e4 LT |
762 | |
763 | if(ei->CommandStatus != 0) | |
764 | { /* an error has occurred */ | |
765 | switch(ei->CommandStatus) | |
766 | { | |
767 | case CMD_TARGET_STATUS: | |
768 | /* Pass it up to the upper layers... */ | |
769 | if( ei->ScsiStatus) | |
770 | { | |
771 | #if 0 | |
772 | printk(KERN_WARNING "cciss: cmd %p " | |
773 | "has SCSI Status = %x\n", | |
774 | cp, | |
775 | ei->ScsiStatus); | |
776 | #endif | |
777 | cmd->result |= (ei->ScsiStatus < 1); | |
778 | } | |
779 | else { /* scsi status is zero??? How??? */ | |
780 | ||
781 | /* Ordinarily, this case should never happen, but there is a bug | |
782 | in some released firmware revisions that allows it to happen | |
783 | if, for example, a 4100 backplane loses power and the tape | |
784 | drive is in it. We assume that it's a fatal error of some | |
785 | kind because we can't show that it wasn't. We will make it | |
786 | look like selection timeout since that is the most common | |
787 | reason for this to occur, and it's severe enough. */ | |
788 | ||
789 | cmd->result = DID_NO_CONNECT << 16; | |
790 | } | |
791 | break; | |
792 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
793 | break; | |
794 | case CMD_DATA_OVERRUN: | |
795 | printk(KERN_WARNING "cciss: cp %p has" | |
796 | " completed with data overrun " | |
797 | "reported\n", cp); | |
798 | break; | |
799 | case CMD_INVALID: { | |
800 | /* print_bytes(cp, sizeof(*cp), 1, 0); | |
801 | print_cmd(cp); */ | |
802 | /* We get CMD_INVALID if you address a non-existent tape drive instead | |
803 | of a selection timeout (no response). You will see this if you yank | |
804 | out a tape drive, then try to access it. This is kind of a shame | |
805 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
806 | get interpreted as a missing target. */ | |
807 | cmd->result = DID_NO_CONNECT << 16; | |
808 | } | |
809 | break; | |
810 | case CMD_PROTOCOL_ERR: | |
811 | printk(KERN_WARNING "cciss: cp %p has " | |
812 | "protocol error \n", cp); | |
813 | break; | |
814 | case CMD_HARDWARE_ERR: | |
815 | cmd->result = DID_ERROR << 16; | |
816 | printk(KERN_WARNING "cciss: cp %p had " | |
817 | " hardware error\n", cp); | |
818 | break; | |
819 | case CMD_CONNECTION_LOST: | |
820 | cmd->result = DID_ERROR << 16; | |
821 | printk(KERN_WARNING "cciss: cp %p had " | |
822 | "connection lost\n", cp); | |
823 | break; | |
824 | case CMD_ABORTED: | |
825 | cmd->result = DID_ABORT << 16; | |
826 | printk(KERN_WARNING "cciss: cp %p was " | |
827 | "aborted\n", cp); | |
828 | break; | |
829 | case CMD_ABORT_FAILED: | |
830 | cmd->result = DID_ERROR << 16; | |
831 | printk(KERN_WARNING "cciss: cp %p reports " | |
832 | "abort failed\n", cp); | |
833 | break; | |
834 | case CMD_UNSOLICITED_ABORT: | |
835 | cmd->result = DID_ABORT << 16; | |
836 | printk(KERN_WARNING "cciss: cp %p aborted " | |
837 | "do to an unsolicited abort\n", cp); | |
838 | break; | |
839 | case CMD_TIMEOUT: | |
840 | cmd->result = DID_TIME_OUT << 16; | |
841 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
842 | cp); | |
843 | break; | |
844 | default: | |
845 | cmd->result = DID_ERROR << 16; | |
846 | printk(KERN_WARNING "cciss: cp %p returned " | |
847 | "unknown status %x\n", cp, | |
848 | ei->CommandStatus); | |
849 | } | |
850 | } | |
851 | // printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel, | |
852 | // cmd->target, cmd->lun); | |
853 | cmd->scsi_done(cmd); | |
854 | scsi_cmd_free(ctlr, cp); | |
855 | } | |
856 | ||
857 | static int | |
858 | cciss_scsi_detect(int ctlr) | |
859 | { | |
860 | struct Scsi_Host *sh; | |
861 | int error; | |
862 | ||
863 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
864 | if (sh == NULL) | |
865 | goto fail; | |
866 | sh->io_port = 0; // good enough? FIXME, | |
867 | sh->n_io_port = 0; // I don't think we use these two... | |
868 | sh->this_id = SELF_SCSI_ID; | |
869 | ||
870 | ((struct cciss_scsi_adapter_data_t *) | |
871 | hba[ctlr]->scsi_ctlr)->scsi_host = (void *) sh; | |
872 | sh->hostdata[0] = (unsigned long) hba[ctlr]; | |
fb86a35b | 873 | sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT]; |
1da177e4 LT |
874 | sh->unique_id = sh->irq; |
875 | error = scsi_add_host(sh, &hba[ctlr]->pdev->dev); | |
876 | if (error) | |
877 | goto fail_host_put; | |
878 | scsi_scan_host(sh); | |
879 | return 1; | |
880 | ||
881 | fail_host_put: | |
882 | scsi_host_put(sh); | |
883 | fail: | |
884 | return 0; | |
885 | } | |
886 | ||
887 | static void | |
888 | cciss_unmap_one(struct pci_dev *pdev, | |
889 | CommandList_struct *cp, | |
890 | size_t buflen, | |
891 | int data_direction) | |
892 | { | |
893 | u64bit addr64; | |
894 | ||
895 | addr64.val32.lower = cp->SG[0].Addr.lower; | |
896 | addr64.val32.upper = cp->SG[0].Addr.upper; | |
897 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); | |
898 | } | |
899 | ||
900 | static void | |
901 | cciss_map_one(struct pci_dev *pdev, | |
902 | CommandList_struct *cp, | |
903 | unsigned char *buf, | |
904 | size_t buflen, | |
905 | int data_direction) | |
906 | { | |
907 | __u64 addr64; | |
908 | ||
909 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
910 | cp->SG[0].Addr.lower = | |
911 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
912 | cp->SG[0].Addr.upper = | |
913 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
914 | cp->SG[0].Len = buflen; | |
915 | cp->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
916 | cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
917 | } | |
918 | ||
919 | static int | |
920 | cciss_scsi_do_simple_cmd(ctlr_info_t *c, | |
921 | CommandList_struct *cp, | |
922 | unsigned char *scsi3addr, | |
923 | unsigned char *cdb, | |
924 | unsigned char cdblen, | |
925 | unsigned char *buf, int bufsize, | |
926 | int direction) | |
927 | { | |
928 | unsigned long flags; | |
6e9a4738 | 929 | DECLARE_COMPLETION_ONSTACK(wait); |
1da177e4 LT |
930 | |
931 | cp->cmd_type = CMD_IOCTL_PEND; // treat this like an ioctl | |
932 | cp->scsi_cmd = NULL; | |
933 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
934 | memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN)); | |
935 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
936 | // Fill in the request block... | |
937 | ||
938 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
939 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
940 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
941 | ||
942 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
943 | memcpy(cp->Request.CDB, cdb, cdblen); | |
944 | cp->Request.Timeout = 0; | |
945 | cp->Request.CDBLen = cdblen; | |
946 | cp->Request.Type.Type = TYPE_CMD; | |
947 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
948 | cp->Request.Type.Direction = direction; | |
949 | ||
950 | /* Fill in the SG list and do dma mapping */ | |
951 | cciss_map_one(c->pdev, cp, (unsigned char *) buf, | |
952 | bufsize, DMA_FROM_DEVICE); | |
953 | ||
954 | cp->waiting = &wait; | |
955 | ||
956 | /* Put the request on the tail of the request queue */ | |
957 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
958 | addQ(&c->reqQ, cp); | |
959 | c->Qdepth++; | |
960 | start_io(c); | |
961 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
962 | ||
963 | wait_for_completion(&wait); | |
964 | ||
965 | /* undo the dma mapping */ | |
966 | cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE); | |
967 | return(0); | |
968 | } | |
969 | ||
970 | static void | |
971 | cciss_scsi_interpret_error(CommandList_struct *cp) | |
972 | { | |
973 | ErrorInfo_struct *ei; | |
974 | ||
975 | ei = cp->err_info; | |
976 | switch(ei->CommandStatus) | |
977 | { | |
978 | case CMD_TARGET_STATUS: | |
979 | printk(KERN_WARNING "cciss: cmd %p has " | |
980 | "completed with errors\n", cp); | |
981 | printk(KERN_WARNING "cciss: cmd %p " | |
982 | "has SCSI Status = %x\n", | |
983 | cp, | |
984 | ei->ScsiStatus); | |
985 | if (ei->ScsiStatus == 0) | |
986 | printk(KERN_WARNING | |
987 | "cciss:SCSI status is abnormally zero. " | |
988 | "(probably indicates selection timeout " | |
989 | "reported incorrectly due to a known " | |
990 | "firmware bug, circa July, 2001.)\n"); | |
991 | break; | |
992 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
993 | printk("UNDERRUN\n"); | |
994 | break; | |
995 | case CMD_DATA_OVERRUN: | |
996 | printk(KERN_WARNING "cciss: cp %p has" | |
997 | " completed with data overrun " | |
998 | "reported\n", cp); | |
999 | break; | |
1000 | case CMD_INVALID: { | |
1001 | /* controller unfortunately reports SCSI passthru's */ | |
1002 | /* to non-existent targets as invalid commands. */ | |
1003 | printk(KERN_WARNING "cciss: cp %p is " | |
1004 | "reported invalid (probably means " | |
1005 | "target device no longer present)\n", | |
1006 | cp); | |
1007 | /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0); | |
1008 | print_cmd(cp); */ | |
1009 | } | |
1010 | break; | |
1011 | case CMD_PROTOCOL_ERR: | |
1012 | printk(KERN_WARNING "cciss: cp %p has " | |
1013 | "protocol error \n", cp); | |
1014 | break; | |
1015 | case CMD_HARDWARE_ERR: | |
1016 | /* cmd->result = DID_ERROR << 16; */ | |
1017 | printk(KERN_WARNING "cciss: cp %p had " | |
1018 | " hardware error\n", cp); | |
1019 | break; | |
1020 | case CMD_CONNECTION_LOST: | |
1021 | printk(KERN_WARNING "cciss: cp %p had " | |
1022 | "connection lost\n", cp); | |
1023 | break; | |
1024 | case CMD_ABORTED: | |
1025 | printk(KERN_WARNING "cciss: cp %p was " | |
1026 | "aborted\n", cp); | |
1027 | break; | |
1028 | case CMD_ABORT_FAILED: | |
1029 | printk(KERN_WARNING "cciss: cp %p reports " | |
1030 | "abort failed\n", cp); | |
1031 | break; | |
1032 | case CMD_UNSOLICITED_ABORT: | |
1033 | printk(KERN_WARNING "cciss: cp %p aborted " | |
1034 | "do to an unsolicited abort\n", cp); | |
1035 | break; | |
1036 | case CMD_TIMEOUT: | |
1037 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
1038 | cp); | |
1039 | break; | |
1040 | default: | |
1041 | printk(KERN_WARNING "cciss: cp %p returned " | |
1042 | "unknown status %x\n", cp, | |
1043 | ei->CommandStatus); | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | static int | |
1048 | cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr, | |
905bd78f | 1049 | unsigned char page, unsigned char *buf, |
1050 | unsigned char bufsize) | |
1da177e4 LT |
1051 | { |
1052 | int rc; | |
1053 | CommandList_struct *cp; | |
1054 | char cdb[6]; | |
1055 | ErrorInfo_struct *ei; | |
1056 | unsigned long flags; | |
1057 | ||
1058 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1059 | cp = scsi_cmd_alloc(c); | |
1060 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1061 | ||
1062 | if (cp == NULL) { /* trouble... */ | |
1063 | printk("cmd_alloc returned NULL!\n"); | |
1064 | return -1; | |
1065 | } | |
1066 | ||
1067 | ei = cp->err_info; | |
1068 | ||
1069 | cdb[0] = CISS_INQUIRY; | |
905bd78f | 1070 | cdb[1] = (page != 0); |
1071 | cdb[2] = page; | |
1da177e4 | 1072 | cdb[3] = 0; |
47922d06 | 1073 | cdb[4] = bufsize; |
1da177e4 LT |
1074 | cdb[5] = 0; |
1075 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb, | |
47922d06 | 1076 | 6, buf, bufsize, XFER_READ); |
1da177e4 LT |
1077 | |
1078 | if (rc != 0) return rc; /* something went wrong */ | |
1079 | ||
1080 | if (ei->CommandStatus != 0 && | |
1081 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
1082 | cciss_scsi_interpret_error(cp); | |
1083 | rc = -1; | |
1084 | } | |
1085 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1086 | scsi_cmd_free(c, cp); | |
1087 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1088 | return rc; | |
1089 | } | |
1090 | ||
905bd78f | 1091 | /* Get the device id from inquiry page 0x83 */ |
1092 | static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr, | |
1093 | unsigned char *device_id, int buflen) | |
1094 | { | |
1095 | int rc; | |
1096 | unsigned char *buf; | |
1097 | ||
1098 | if (buflen > 16) | |
1099 | buflen = 16; | |
1100 | buf = kzalloc(64, GFP_KERNEL); | |
1101 | if (!buf) | |
1102 | return -1; | |
1103 | rc = cciss_scsi_do_inquiry(c, scsi3addr, 0x83, buf, 64); | |
1104 | if (rc == 0) | |
1105 | memcpy(device_id, &buf[8], buflen); | |
1106 | kfree(buf); | |
1107 | return rc != 0; | |
1108 | } | |
1109 | ||
1da177e4 LT |
1110 | static int |
1111 | cciss_scsi_do_report_phys_luns(ctlr_info_t *c, | |
1112 | ReportLunData_struct *buf, int bufsize) | |
1113 | { | |
1114 | int rc; | |
1115 | CommandList_struct *cp; | |
1116 | unsigned char cdb[12]; | |
1117 | unsigned char scsi3addr[8]; | |
1118 | ErrorInfo_struct *ei; | |
1119 | unsigned long flags; | |
1120 | ||
1121 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1122 | cp = scsi_cmd_alloc(c); | |
1123 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1124 | if (cp == NULL) { /* trouble... */ | |
1125 | printk("cmd_alloc returned NULL!\n"); | |
1126 | return -1; | |
1127 | } | |
1128 | ||
1129 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
1130 | cdb[0] = CISS_REPORT_PHYS; | |
1131 | cdb[1] = 0; | |
1132 | cdb[2] = 0; | |
1133 | cdb[3] = 0; | |
1134 | cdb[4] = 0; | |
1135 | cdb[5] = 0; | |
1136 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
1137 | cdb[7] = (bufsize >> 16) & 0xFF; | |
1138 | cdb[8] = (bufsize >> 8) & 0xFF; | |
1139 | cdb[9] = bufsize & 0xFF; | |
1140 | cdb[10] = 0; | |
1141 | cdb[11] = 0; | |
1142 | ||
1143 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, | |
1144 | cdb, 12, | |
1145 | (unsigned char *) buf, | |
1146 | bufsize, XFER_READ); | |
1147 | ||
1148 | if (rc != 0) return rc; /* something went wrong */ | |
1149 | ||
1150 | ei = cp->err_info; | |
1151 | if (ei->CommandStatus != 0 && | |
1152 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
1153 | cciss_scsi_interpret_error(cp); | |
1154 | rc = -1; | |
1155 | } | |
1156 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1157 | scsi_cmd_free(c, cp); | |
1158 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1159 | return rc; | |
1160 | } | |
1161 | ||
1162 | static void | |
1163 | cciss_update_non_disk_devices(int cntl_num, int hostno) | |
1164 | { | |
1165 | /* the idea here is we could get notified from /proc | |
1166 | that some devices have changed, so we do a report | |
1167 | physical luns cmd, and adjust our list of devices | |
1168 | accordingly. (We can't rely on the scsi-mid layer just | |
1169 | doing inquiries, because the "busses" that the scsi | |
1170 | mid-layer probes are totally fabricated by this driver, | |
1171 | so new devices wouldn't show up. | |
1172 | ||
1173 | the scsi3addr's of devices won't change so long as the | |
1174 | adapter is not reset. That means we can rescan and | |
1175 | tell which devices we already know about, vs. new | |
1176 | devices, vs. disappearing devices. | |
1177 | ||
1178 | Also, if you yank out a tape drive, then put in a disk | |
1179 | in it's place, (say, a configured volume from another | |
1180 | array controller for instance) _don't_ poke this driver | |
1181 | (so it thinks it's still a tape, but _do_ poke the scsi | |
1182 | mid layer, so it does an inquiry... the scsi mid layer | |
1183 | will see the physical disk. This would be bad. Need to | |
1184 | think about how to prevent that. One idea would be to | |
1185 | snoop all scsi responses and if an inquiry repsonse comes | |
1186 | back that reports a disk, chuck it an return selection | |
1187 | timeout instead and adjust our table... Not sure i like | |
1188 | that though. | |
1189 | ||
1190 | */ | |
47922d06 MM |
1191 | #define OBDR_TAPE_INQ_SIZE 49 |
1192 | #define OBDR_TAPE_SIG "$DR-10" | |
1da177e4 | 1193 | ReportLunData_struct *ld_buff; |
47922d06 | 1194 | unsigned char *inq_buff; |
1da177e4 LT |
1195 | unsigned char scsi3addr[8]; |
1196 | ctlr_info_t *c; | |
1197 | __u32 num_luns=0; | |
1198 | unsigned char *ch; | |
905bd78f | 1199 | struct cciss_scsi_dev_t *currentsd, *this_device; |
1da177e4 LT |
1200 | int ncurrent=0; |
1201 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1202 | int i; | |
1203 | ||
1204 | c = (ctlr_info_t *) hba[cntl_num]; | |
06ff37ff | 1205 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
47922d06 | 1206 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
905bd78f | 1207 | currentsd = kzalloc(sizeof(*currentsd) * |
1208 | (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); | |
1209 | if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { | |
1210 | printk(KERN_ERR "cciss: out of memory\n"); | |
1211 | goto out; | |
1da177e4 | 1212 | } |
905bd78f | 1213 | this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
1da177e4 LT |
1214 | if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) { |
1215 | ch = &ld_buff->LUNListLength[0]; | |
1216 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1217 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1218 | printk(KERN_WARNING | |
1219 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1220 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1221 | num_luns - CISS_MAX_PHYS_LUN); | |
1222 | num_luns = CISS_MAX_PHYS_LUN; | |
1223 | } | |
1224 | } | |
1225 | else { | |
1226 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1227 | goto out; | |
1228 | } | |
1229 | ||
1230 | ||
1231 | /* adjust our table of devices */ | |
905bd78f | 1232 | for (i = 0; i < num_luns; i++) { |
1da177e4 LT |
1233 | /* for each physical lun, do an inquiry */ |
1234 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
47922d06 | 1235 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
1da177e4 LT |
1236 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
1237 | ||
905bd78f | 1238 | if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, 0, inq_buff, |
1239 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) | |
1da177e4 | 1240 | /* Inquiry failed (msg printed already) */ |
905bd78f | 1241 | continue; /* so we will skip this device. */ |
1242 | ||
1243 | this_device->devtype = (inq_buff[0] & 0x1f); | |
1244 | this_device->bus = -1; | |
1245 | this_device->target = -1; | |
1246 | this_device->lun = -1; | |
1247 | memcpy(this_device->scsi3addr, scsi3addr, 8); | |
1248 | memcpy(this_device->vendor, &inq_buff[8], | |
1249 | sizeof(this_device->vendor)); | |
1250 | memcpy(this_device->model, &inq_buff[16], | |
1251 | sizeof(this_device->model)); | |
1252 | memcpy(this_device->revision, &inq_buff[32], | |
1253 | sizeof(this_device->revision)); | |
1254 | memset(this_device->device_id, 0, | |
1255 | sizeof(this_device->device_id)); | |
1256 | cciss_scsi_get_device_id(hba[cntl_num], scsi3addr, | |
1257 | this_device->device_id, sizeof(this_device->device_id)); | |
1258 | ||
1259 | switch (this_device->devtype) | |
1da177e4 | 1260 | { |
47922d06 MM |
1261 | case 0x05: /* CD-ROM */ { |
1262 | ||
1263 | /* We don't *really* support actual CD-ROM devices, | |
1264 | * just this "One Button Disaster Recovery" tape drive | |
1265 | * which temporarily pretends to be a CD-ROM drive. | |
1266 | * So we check that the device is really an OBDR tape | |
1267 | * device by checking for "$DR-10" in bytes 43-48 of | |
1268 | * the inquiry data. | |
1269 | */ | |
1270 | char obdr_sig[7]; | |
1271 | ||
1272 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1273 | obdr_sig[6] = '\0'; | |
1274 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1275 | /* Not OBDR device, ignore it. */ | |
1276 | break; | |
1277 | } | |
1278 | /* fall through . . . */ | |
1da177e4 LT |
1279 | case 0x01: /* sequential access, (tape) */ |
1280 | case 0x08: /* medium changer */ | |
1281 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1282 | printk(KERN_INFO "cciss%d: %s ignored, " | |
1283 | "too many devices.\n", cntl_num, | |
905bd78f | 1284 | scsi_device_type(this_device->devtype)); |
1da177e4 LT |
1285 | break; |
1286 | } | |
905bd78f | 1287 | currentsd[ncurrent] = *this_device; |
1da177e4 LT |
1288 | ncurrent++; |
1289 | break; | |
1290 | default: | |
1291 | break; | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent); | |
1296 | out: | |
1297 | kfree(inq_buff); | |
1298 | kfree(ld_buff); | |
905bd78f | 1299 | kfree(currentsd); |
1da177e4 LT |
1300 | return; |
1301 | } | |
1302 | ||
1303 | static int | |
1304 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1305 | { | |
1306 | int verb_len = strlen(verb); | |
1307 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1308 | return verb_len; | |
1309 | else | |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | static int | |
1314 | cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length) | |
1315 | { | |
1316 | int arg_len; | |
1317 | ||
1318 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
1319 | cciss_update_non_disk_devices(ctlr, hostno); | |
1320 | else | |
1321 | return -EINVAL; | |
1322 | return length; | |
1323 | } | |
1324 | ||
1325 | ||
1326 | static int | |
1327 | cciss_scsi_proc_info(struct Scsi_Host *sh, | |
1328 | char *buffer, /* data buffer */ | |
1329 | char **start, /* where data in buffer starts */ | |
1330 | off_t offset, /* offset from start of imaginary file */ | |
1331 | int length, /* length of data in buffer */ | |
1332 | int func) /* 0 == read, 1 == write */ | |
1333 | { | |
1334 | ||
1335 | int buflen, datalen; | |
1336 | ctlr_info_t *ci; | |
b9f0bd08 | 1337 | int i; |
1da177e4 LT |
1338 | int cntl_num; |
1339 | ||
1340 | ||
1341 | ci = (ctlr_info_t *) sh->hostdata[0]; | |
1342 | if (ci == NULL) /* This really shouldn't ever happen. */ | |
1343 | return -EINVAL; | |
1344 | ||
1345 | cntl_num = ci->ctlr; /* Get our index into the hba[] array */ | |
1346 | ||
1347 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ | |
b9f0bd08 MM |
1348 | buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", |
1349 | cntl_num, sh->host_no); | |
1350 | ||
1351 | /* this information is needed by apps to know which cciss | |
1352 | device corresponds to which scsi host number without | |
1353 | having to open a scsi target device node. The device | |
1354 | information is not a duplicate of /proc/scsi/scsi because | |
1355 | the two may be out of sync due to scsi hotplug, rather | |
1356 | this info is for an app to be able to use to know how to | |
1357 | get them back in sync. */ | |
1358 | ||
1359 | for (i=0;i<ccissscsi[cntl_num].ndevices;i++) { | |
1360 | struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i]; | |
1361 | buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " | |
1362 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1363 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1364 | sd->devtype, | |
1365 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1366 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1367 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1368 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1369 | } | |
1da177e4 LT |
1370 | datalen = buflen - offset; |
1371 | if (datalen < 0) { /* they're reading past EOF. */ | |
1372 | datalen = 0; | |
1373 | *start = buffer+buflen; | |
1374 | } else | |
1375 | *start = buffer + offset; | |
1376 | return(datalen); | |
1377 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ | |
1378 | return cciss_scsi_user_command(cntl_num, sh->host_no, | |
1379 | buffer, length); | |
1380 | } | |
1381 | ||
1382 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1383 | dma mapping and fills in the scatter gather entries of the | |
1384 | cciss command, cp. */ | |
1385 | ||
1386 | static void | |
1387 | cciss_scatter_gather(struct pci_dev *pdev, | |
1388 | CommandList_struct *cp, | |
1389 | struct scsi_cmnd *cmd) | |
1390 | { | |
41ce639a FT |
1391 | unsigned int len; |
1392 | struct scatterlist *sg; | |
1da177e4 | 1393 | __u64 addr64; |
41ce639a FT |
1394 | int use_sg, i; |
1395 | ||
1396 | BUG_ON(scsi_sg_count(cmd) > MAXSGENTRIES); | |
1397 | ||
1398 | use_sg = scsi_dma_map(cmd); | |
1399 | if (use_sg) { /* not too many addrs? */ | |
1400 | scsi_for_each_sg(cmd, sg, use_sg, i) { | |
1401 | addr64 = (__u64) sg_dma_address(sg); | |
1402 | len = sg_dma_len(sg); | |
1403 | cp->SG[i].Addr.lower = | |
1404 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
1405 | cp->SG[i].Addr.upper = | |
1406 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
1407 | cp->SG[i].Len = len; | |
1408 | cp->SG[i].Ext = 0; // we are not chaining | |
1da177e4 | 1409 | } |
41ce639a | 1410 | } |
1da177e4 | 1411 | |
41ce639a FT |
1412 | cp->Header.SGList = (__u8) use_sg; /* no. SGs contig in this cmd */ |
1413 | cp->Header.SGTotal = (__u16) use_sg; /* total sgs in this cmd list */ | |
1da177e4 LT |
1414 | return; |
1415 | } | |
1416 | ||
1417 | ||
1418 | static int | |
1419 | cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) | |
1420 | { | |
1421 | ctlr_info_t **c; | |
1422 | int ctlr, rc; | |
1423 | unsigned char scsi3addr[8]; | |
1424 | CommandList_struct *cp; | |
1425 | unsigned long flags; | |
1426 | ||
1427 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1428 | // We violate cmd->host privacy here. (Is there another way?) | |
1429 | c = (ctlr_info_t **) &cmd->device->host->hostdata[0]; | |
1430 | ctlr = (*c)->ctlr; | |
1431 | ||
1432 | rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id, | |
1433 | cmd->device->lun, scsi3addr); | |
1434 | if (rc != 0) { | |
1435 | /* the scsi nexus does not match any that we presented... */ | |
1436 | /* pretend to mid layer that we got selection timeout */ | |
1437 | cmd->result = DID_NO_CONNECT << 16; | |
1438 | done(cmd); | |
1439 | /* we might want to think about registering controller itself | |
1440 | as a processor device on the bus so sg binds to it. */ | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | /* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n", | |
1445 | cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/ | |
1446 | // printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel, | |
1447 | // cmd->target, cmd->lun); | |
1448 | ||
1449 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and | |
1450 | see what the device thinks of it. */ | |
1451 | ||
1452 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1453 | cp = scsi_cmd_alloc(*c); | |
1454 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1455 | if (cp == NULL) { /* trouble... */ | |
1456 | printk("scsi_cmd_alloc returned NULL!\n"); | |
1457 | /* FIXME: next 3 lines are -> BAD! <- */ | |
1458 | cmd->result = DID_NO_CONNECT << 16; | |
1459 | done(cmd); | |
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | // Fill in the command list header | |
1464 | ||
1465 | cmd->scsi_done = done; // save this for use by completion code | |
1466 | ||
1467 | // save cp in case we have to abort it | |
1468 | cmd->host_scribble = (unsigned char *) cp; | |
1469 | ||
1470 | cp->cmd_type = CMD_SCSI; | |
1471 | cp->scsi_cmd = cmd; | |
1472 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
1473 | memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1474 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
1475 | ||
1476 | // Fill in the request block... | |
1477 | ||
1478 | cp->Request.Timeout = 0; | |
1479 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
089fe1b2 | 1480 | BUG_ON(cmd->cmd_len > sizeof(cp->Request.CDB)); |
1da177e4 LT |
1481 | cp->Request.CDBLen = cmd->cmd_len; |
1482 | memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1483 | cp->Request.Type.Type = TYPE_CMD; | |
1484 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
1485 | switch(cmd->sc_data_direction) | |
1486 | { | |
1487 | case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break; | |
1488 | case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break; | |
1489 | case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break; | |
1490 | case DMA_BIDIRECTIONAL: | |
1491 | // This can happen if a buggy application does a scsi passthru | |
1492 | // and sets both inlen and outlen to non-zero. ( see | |
1493 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1494 | ||
1495 | cp->Request.Type.Direction = XFER_RSVD; | |
1496 | // This is technically wrong, and cciss controllers should | |
1497 | // reject it with CMD_INVALID, which is the most correct | |
1498 | // response, but non-fibre backends appear to let it | |
1499 | // slide by, and give the same results as if this field | |
1500 | // were set correctly. Either way is acceptable for | |
1501 | // our purposes here. | |
1502 | ||
1503 | break; | |
1504 | ||
1505 | default: | |
1506 | printk("cciss: unknown data direction: %d\n", | |
1507 | cmd->sc_data_direction); | |
1508 | BUG(); | |
1509 | break; | |
1510 | } | |
1511 | ||
1512 | cciss_scatter_gather((*c)->pdev, cp, cmd); // Fill the SG list | |
1513 | ||
1514 | /* Put the request on the tail of the request queue */ | |
1515 | ||
1516 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1517 | addQ(&(*c)->reqQ, cp); | |
1518 | (*c)->Qdepth++; | |
1519 | start_io(*c); | |
1520 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1521 | ||
1522 | /* the cmd'll come back via intr handler in complete_scsi_command() */ | |
1523 | return 0; | |
1524 | } | |
1525 | ||
1526 | static void | |
1527 | cciss_unregister_scsi(int ctlr) | |
1528 | { | |
1529 | struct cciss_scsi_adapter_data_t *sa; | |
1530 | struct cciss_scsi_cmd_stack_t *stk; | |
1531 | unsigned long flags; | |
1532 | ||
1533 | /* we are being forcibly unloaded, and may not refuse. */ | |
1534 | ||
1535 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1536 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
1537 | stk = &sa->cmd_stack; | |
1538 | ||
1539 | /* if we weren't ever actually registered, don't unregister */ | |
1540 | if (sa->registered) { | |
1541 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1542 | scsi_remove_host(sa->scsi_host); | |
1543 | scsi_host_put(sa->scsi_host); | |
1544 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1545 | } | |
1546 | ||
1547 | /* set scsi_host to NULL so our detect routine will | |
1548 | find us on register */ | |
1549 | sa->scsi_host = NULL; | |
6195057f | 1550 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
1da177e4 LT |
1551 | scsi_cmd_stack_free(ctlr); |
1552 | kfree(sa); | |
1da177e4 LT |
1553 | } |
1554 | ||
1da177e4 LT |
1555 | static int |
1556 | cciss_engage_scsi(int ctlr) | |
1557 | { | |
1558 | struct cciss_scsi_adapter_data_t *sa; | |
1559 | struct cciss_scsi_cmd_stack_t *stk; | |
1560 | unsigned long flags; | |
1561 | ||
1562 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1563 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
1564 | stk = &sa->cmd_stack; | |
1565 | ||
f4a93bcd | 1566 | if (sa->registered) { |
1da177e4 LT |
1567 | printk("cciss%d: SCSI subsystem already engaged.\n", ctlr); |
1568 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1569 | return ENXIO; | |
1570 | } | |
f4a93bcd | 1571 | sa->registered = 1; |
1da177e4 LT |
1572 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
1573 | cciss_update_non_disk_devices(ctlr, -1); | |
f4a93bcd | 1574 | cciss_scsi_detect(ctlr); |
1da177e4 LT |
1575 | return 0; |
1576 | } | |
1577 | ||
1578 | static void | |
89b6e743 | 1579 | cciss_seq_tape_report(struct seq_file *seq, int ctlr) |
1da177e4 LT |
1580 | { |
1581 | unsigned long flags; | |
1da177e4 LT |
1582 | |
1583 | CPQ_TAPE_LOCK(ctlr, flags); | |
89b6e743 | 1584 | seq_printf(seq, |
b9f0bd08 | 1585 | "Sequential access devices: %d\n\n", |
1da177e4 LT |
1586 | ccissscsi[ctlr].ndevices); |
1587 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1da177e4 LT |
1588 | } |
1589 | ||
88f627ae SC |
1590 | static int wait_for_device_to_become_ready(ctlr_info_t *h, |
1591 | unsigned char lunaddr[]) | |
1592 | { | |
1593 | int rc; | |
1594 | int count = 0; | |
1595 | int waittime = HZ; | |
1596 | CommandList_struct *c; | |
1597 | ||
1598 | c = cmd_alloc(h, 1); | |
1599 | if (!c) { | |
1600 | printk(KERN_WARNING "cciss%d: out of memory in " | |
1601 | "wait_for_device_to_become_ready.\n", h->ctlr); | |
1602 | return IO_ERROR; | |
1603 | } | |
1604 | ||
1605 | /* Send test unit ready until device ready, or give up. */ | |
1606 | while (count < 20) { | |
1607 | ||
1608 | /* Wait for a bit. do this first, because if we send | |
1609 | * the TUR right away, the reset will just abort it. | |
1610 | */ | |
77b0308a | 1611 | schedule_timeout_interruptible(waittime); |
88f627ae SC |
1612 | count++; |
1613 | ||
1614 | /* Increase wait time with each try, up to a point. */ | |
1615 | if (waittime < (HZ * 30)) | |
1616 | waittime = waittime * 2; | |
1617 | ||
1618 | /* Send the Test Unit Ready */ | |
1619 | rc = fill_cmd(c, TEST_UNIT_READY, h->ctlr, NULL, 0, 0, 0, 0, | |
1620 | lunaddr, TYPE_CMD); | |
1621 | if (rc == 0) { | |
1622 | rc = sendcmd_core(h, c); | |
1623 | /* sendcmd turned off interrupts, turn 'em back on. */ | |
1624 | h->access.set_intr_mask(h, CCISS_INTR_ON); | |
1625 | } | |
1626 | ||
1627 | if (rc == 0 && c->err_info->CommandStatus == CMD_SUCCESS) | |
1628 | break; | |
1629 | ||
1630 | if (rc == 0 && | |
1631 | c->err_info->CommandStatus == CMD_TARGET_STATUS && | |
1632 | c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION && | |
1633 | (c->err_info->SenseInfo[2] == NO_SENSE || | |
1634 | c->err_info->SenseInfo[2] == UNIT_ATTENTION)) | |
1635 | break; | |
1636 | ||
1637 | printk(KERN_WARNING "cciss%d: Waiting %d secs " | |
1638 | "for device to become ready.\n", | |
1639 | h->ctlr, waittime / HZ); | |
1640 | rc = 1; /* device not ready. */ | |
1641 | } | |
1642 | ||
1643 | if (rc) | |
1644 | printk("cciss%d: giving up on device.\n", h->ctlr); | |
1645 | else | |
1646 | printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr); | |
1647 | ||
1648 | cmd_free(h, c, 1); | |
1649 | return rc; | |
1650 | } | |
89b6e743 | 1651 | |
3da8b713 | 1652 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
1653 | * complaining. Doing a host- or bus-reset can't do anything good here. | |
1654 | * Despite what it might say in scsi_error.c, there may well be commands | |
1655 | * on the controller, as the cciss driver registers twice, once as a block | |
1656 | * device for the logical drives, and once as a scsi device, for any tape | |
1657 | * drives. So we know there are no commands out on the tape drives, but we | |
1658 | * don't know there are no commands on the controller, and it is likely | |
1659 | * that there probably are, as the cciss block device is most commonly used | |
1660 | * as a boot device (embedded controller on HP/Compaq systems.) | |
1661 | */ | |
1662 | ||
1663 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) | |
1664 | { | |
1665 | int rc; | |
1666 | CommandList_struct *cmd_in_trouble; | |
88f627ae | 1667 | unsigned char lunaddr[8]; |
3da8b713 | 1668 | ctlr_info_t **c; |
1669 | int ctlr; | |
1670 | ||
1671 | /* find the controller to which the command to be aborted was sent */ | |
1672 | c = (ctlr_info_t **) &scsicmd->device->host->hostdata[0]; | |
1673 | if (c == NULL) /* paranoia */ | |
1674 | return FAILED; | |
1675 | ctlr = (*c)->ctlr; | |
1676 | printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr); | |
3da8b713 | 1677 | /* find the command that's giving us trouble */ |
1678 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; | |
88f627ae | 1679 | if (cmd_in_trouble == NULL) /* paranoia */ |
3da8b713 | 1680 | return FAILED; |
88f627ae | 1681 | memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); |
3da8b713 | 1682 | /* send a reset to the SCSI LUN which the command was sent to */ |
88f627ae | 1683 | rc = sendcmd(CCISS_RESET_MSG, ctlr, NULL, 0, 2, 0, 0, lunaddr, |
3da8b713 | 1684 | TYPE_MSG); |
f66083c3 | 1685 | /* sendcmd turned off interrupts on the board, turn 'em back on. */ |
3da8b713 | 1686 | (*c)->access.set_intr_mask(*c, CCISS_INTR_ON); |
88f627ae | 1687 | if (rc == 0 && wait_for_device_to_become_ready(*c, lunaddr) == 0) |
3da8b713 | 1688 | return SUCCESS; |
1689 | printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr); | |
1690 | return FAILED; | |
1691 | } | |
1692 | ||
1693 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) | |
1694 | { | |
1695 | int rc; | |
1696 | CommandList_struct *cmd_to_abort; | |
1697 | ctlr_info_t **c; | |
1698 | int ctlr; | |
1699 | ||
1700 | /* find the controller to which the command to be aborted was sent */ | |
1701 | c = (ctlr_info_t **) &scsicmd->device->host->hostdata[0]; | |
1702 | if (c == NULL) /* paranoia */ | |
1703 | return FAILED; | |
1704 | ctlr = (*c)->ctlr; | |
1705 | printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", ctlr); | |
1706 | ||
1707 | /* find the command to be aborted */ | |
1708 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; | |
1709 | if (cmd_to_abort == NULL) /* paranoia */ | |
1710 | return FAILED; | |
1711 | rc = sendcmd(CCISS_ABORT_MSG, ctlr, &cmd_to_abort->Header.Tag, | |
1712 | 0, 2, 0, 0, | |
1713 | (unsigned char *) &cmd_to_abort->Header.LUN.LunAddrBytes[0], | |
1714 | TYPE_MSG); | |
f66083c3 | 1715 | /* sendcmd turned off interrupts on the board, turn 'em back on. */ |
3da8b713 | 1716 | (*c)->access.set_intr_mask(*c, CCISS_INTR_ON); |
1717 | if (rc == 0) | |
1718 | return SUCCESS; | |
1719 | return FAILED; | |
1720 | ||
1721 | } | |
1722 | ||
1da177e4 LT |
1723 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
1724 | ||
1725 | /* If no tape support, then these become defined out of existence */ | |
1726 | ||
1727 | #define cciss_scsi_setup(cntl_num) | |
1da177e4 LT |
1728 | |
1729 | #endif /* CONFIG_CISS_SCSI_TAPE */ |