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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 | ||
88f627ae SC |
47 | static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, |
48 | size_t size, | |
b57695fe | 49 | __u8 page_code, unsigned char *scsi3addr, |
88f627ae SC |
50 | int cmd_type); |
51 | ||
88f627ae SC |
52 | static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool); |
53 | static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool); | |
1da177e4 LT |
54 | |
55 | static int cciss_scsi_proc_info( | |
56 | struct Scsi_Host *sh, | |
57 | char *buffer, /* data buffer */ | |
58 | char **start, /* where data in buffer starts */ | |
59 | off_t offset, /* offset from start of imaginary file */ | |
60 | int length, /* length of data in buffer */ | |
61 | int func); /* 0 == read, 1 == write */ | |
62 | ||
63 | static int cciss_scsi_queue_command (struct scsi_cmnd *cmd, | |
64 | void (* done)(struct scsi_cmnd *)); | |
3da8b713 | 65 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *); |
66 | static int cciss_eh_abort_handler(struct scsi_cmnd *); | |
1da177e4 LT |
67 | |
68 | static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { | |
69 | { .name = "cciss0", .ndevices = 0 }, | |
70 | { .name = "cciss1", .ndevices = 0 }, | |
71 | { .name = "cciss2", .ndevices = 0 }, | |
72 | { .name = "cciss3", .ndevices = 0 }, | |
73 | { .name = "cciss4", .ndevices = 0 }, | |
74 | { .name = "cciss5", .ndevices = 0 }, | |
75 | { .name = "cciss6", .ndevices = 0 }, | |
76 | { .name = "cciss7", .ndevices = 0 }, | |
77 | }; | |
78 | ||
79 | static struct scsi_host_template cciss_driver_template = { | |
80 | .module = THIS_MODULE, | |
81 | .name = "cciss", | |
82 | .proc_name = "cciss", | |
83 | .proc_info = cciss_scsi_proc_info, | |
84 | .queuecommand = cciss_scsi_queue_command, | |
85 | .can_queue = SCSI_CCISS_CAN_QUEUE, | |
86 | .this_id = 7, | |
87 | .sg_tablesize = MAXSGENTRIES, | |
88 | .cmd_per_lun = 1, | |
89 | .use_clustering = DISABLE_CLUSTERING, | |
3da8b713 | 90 | /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ |
91 | .eh_device_reset_handler= cciss_eh_device_reset_handler, | |
92 | .eh_abort_handler = cciss_eh_abort_handler, | |
1da177e4 LT |
93 | }; |
94 | ||
95 | #pragma pack(1) | |
1b7d0d28 SC |
96 | |
97 | #define SCSI_PAD_32 4 | |
98 | #define SCSI_PAD_64 4 | |
99 | ||
1da177e4 LT |
100 | struct cciss_scsi_cmd_stack_elem_t { |
101 | CommandList_struct cmd; | |
102 | ErrorInfo_struct Err; | |
103 | __u32 busaddr; | |
1b7d0d28 | 104 | u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64]; |
1da177e4 LT |
105 | }; |
106 | ||
107 | #pragma pack() | |
108 | ||
109 | #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \ | |
110 | CCISS_MAX_SCSI_DEVS_PER_HBA + 2) | |
111 | // plus two for init time usage | |
112 | ||
113 | #pragma pack(1) | |
114 | struct cciss_scsi_cmd_stack_t { | |
115 | struct cciss_scsi_cmd_stack_elem_t *pool; | |
116 | struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE]; | |
117 | dma_addr_t cmd_pool_handle; | |
118 | int top; | |
119 | }; | |
120 | #pragma pack() | |
121 | ||
122 | struct cciss_scsi_adapter_data_t { | |
123 | struct Scsi_Host *scsi_host; | |
124 | struct cciss_scsi_cmd_stack_t cmd_stack; | |
125 | int registered; | |
126 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
127 | }; | |
128 | ||
129 | #define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \ | |
130 | &(((struct cciss_scsi_adapter_data_t *) \ | |
131 | hba[ctlr]->scsi_ctlr)->lock), flags); | |
132 | #define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \ | |
133 | &(((struct cciss_scsi_adapter_data_t *) \ | |
134 | hba[ctlr]->scsi_ctlr)->lock), flags); | |
135 | ||
136 | static CommandList_struct * | |
137 | scsi_cmd_alloc(ctlr_info_t *h) | |
138 | { | |
139 | /* assume only one process in here at a time, locking done by caller. */ | |
140 | /* use CCISS_LOCK(ctlr) */ | |
141 | /* might be better to rewrite how we allocate scsi commands in a way that */ | |
142 | /* needs no locking at all. */ | |
143 | ||
144 | /* take the top memory chunk off the stack and return it, if any. */ | |
145 | struct cciss_scsi_cmd_stack_elem_t *c; | |
146 | struct cciss_scsi_adapter_data_t *sa; | |
147 | struct cciss_scsi_cmd_stack_t *stk; | |
148 | u64bit temp64; | |
149 | ||
150 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; | |
151 | stk = &sa->cmd_stack; | |
152 | ||
153 | if (stk->top < 0) | |
154 | return NULL; | |
155 | c = stk->elem[stk->top]; | |
156 | /* memset(c, 0, sizeof(*c)); */ | |
157 | memset(&c->cmd, 0, sizeof(c->cmd)); | |
158 | memset(&c->Err, 0, sizeof(c->Err)); | |
159 | /* set physical addr of cmd and addr of scsi parameters */ | |
160 | c->cmd.busaddr = c->busaddr; | |
161 | /* (__u32) (stk->cmd_pool_handle + | |
162 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ | |
163 | ||
164 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); | |
165 | /* (__u64) (stk->cmd_pool_handle + | |
166 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + | |
167 | sizeof(CommandList_struct)); */ | |
168 | stk->top--; | |
169 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; | |
170 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; | |
171 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); | |
172 | ||
173 | c->cmd.ctlr = h->ctlr; | |
174 | c->cmd.err_info = &c->Err; | |
175 | ||
176 | return (CommandList_struct *) c; | |
177 | } | |
178 | ||
179 | static void | |
180 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd) | |
181 | { | |
182 | /* assume only one process in here at a time, locking done by caller. */ | |
183 | /* use CCISS_LOCK(ctlr) */ | |
184 | /* drop the free memory chunk on top of the stack. */ | |
185 | ||
186 | struct cciss_scsi_adapter_data_t *sa; | |
187 | struct cciss_scsi_cmd_stack_t *stk; | |
188 | ||
189 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; | |
190 | stk = &sa->cmd_stack; | |
191 | if (stk->top >= CMD_STACK_SIZE) { | |
192 | printk("cciss: scsi_cmd_free called too many times.\n"); | |
193 | BUG(); | |
194 | } | |
195 | stk->top++; | |
196 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd; | |
197 | } | |
198 | ||
199 | static int | |
200 | scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa) | |
201 | { | |
202 | int i; | |
203 | struct cciss_scsi_cmd_stack_t *stk; | |
204 | size_t size; | |
205 | ||
206 | stk = &sa->cmd_stack; | |
207 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
208 | ||
1b7d0d28 SC |
209 | /* Check alignment, see cciss_cmd.h near CommandList_struct def. */ |
210 | BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0); | |
211 | /* pci_alloc_consistent guarantees 32-bit DMA address will be used */ | |
1da177e4 LT |
212 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) |
213 | pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle); | |
214 | ||
215 | if (stk->pool == NULL) { | |
216 | printk("stk->pool is null\n"); | |
217 | return -1; | |
218 | } | |
219 | ||
220 | for (i=0; i<CMD_STACK_SIZE; i++) { | |
221 | stk->elem[i] = &stk->pool[i]; | |
222 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
223 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
224 | } | |
225 | stk->top = CMD_STACK_SIZE-1; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static void | |
230 | scsi_cmd_stack_free(int ctlr) | |
231 | { | |
232 | struct cciss_scsi_adapter_data_t *sa; | |
233 | struct cciss_scsi_cmd_stack_t *stk; | |
234 | size_t size; | |
235 | ||
236 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
237 | stk = &sa->cmd_stack; | |
238 | if (stk->top != CMD_STACK_SIZE-1) { | |
239 | printk( "cciss: %d scsi commands are still outstanding.\n", | |
240 | CMD_STACK_SIZE - stk->top); | |
241 | // BUG(); | |
242 | printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk); | |
243 | } | |
244 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
245 | ||
246 | pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle); | |
247 | stk->pool = NULL; | |
248 | } | |
249 | ||
400bb236 | 250 | #if 0 |
1da177e4 LT |
251 | static int xmargin=8; |
252 | static int amargin=60; | |
253 | ||
254 | static void | |
255 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
256 | { | |
257 | ||
258 | int i; | |
259 | unsigned char *x; | |
260 | ||
261 | if (hex) | |
262 | { | |
263 | x = c; | |
264 | for (i=0;i<len;i++) | |
265 | { | |
266 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
267 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
268 | printk(" %02x", *x); | |
269 | x++; | |
270 | } | |
271 | printk("\n"); | |
272 | } | |
273 | if (ascii) | |
274 | { | |
275 | x = c; | |
276 | for (i=0;i<len;i++) | |
277 | { | |
278 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
279 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
280 | if (*x > 26 && *x < 128) printk("%c", *x); | |
281 | else printk("."); | |
282 | x++; | |
283 | } | |
284 | printk("\n"); | |
285 | } | |
286 | } | |
287 | ||
288 | static void | |
289 | print_cmd(CommandList_struct *cp) | |
290 | { | |
291 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
292 | printk("sglist:%d\n", cp->Header.SGList); | |
293 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
294 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
295 | cp->Header.Tag.lower); | |
296 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
297 | cp->Header.LUN.LunAddrBytes[0], | |
298 | cp->Header.LUN.LunAddrBytes[1], | |
299 | cp->Header.LUN.LunAddrBytes[2], | |
300 | cp->Header.LUN.LunAddrBytes[3], | |
301 | cp->Header.LUN.LunAddrBytes[4], | |
302 | cp->Header.LUN.LunAddrBytes[5], | |
303 | cp->Header.LUN.LunAddrBytes[6], | |
304 | cp->Header.LUN.LunAddrBytes[7]); | |
305 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
306 | printk("Type:%d\n",cp->Request.Type.Type); | |
307 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
308 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
309 | printk("Timeout:%d\n",cp->Request.Timeout); | |
310 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
311 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
312 | cp->Request.CDB[0], cp->Request.CDB[1], | |
313 | cp->Request.CDB[2], cp->Request.CDB[3], | |
314 | cp->Request.CDB[4], cp->Request.CDB[5], | |
315 | cp->Request.CDB[6], cp->Request.CDB[7], | |
316 | cp->Request.CDB[8], cp->Request.CDB[9], | |
317 | cp->Request.CDB[10], cp->Request.CDB[11], | |
318 | cp->Request.CDB[12], cp->Request.CDB[13], | |
319 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
320 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
321 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
322 | cp->ErrDesc.Len); | |
323 | printk("sgs..........Errorinfo:\n"); | |
324 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
325 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
326 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
327 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
328 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
329 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
330 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
331 | ||
332 | } | |
333 | ||
334 | #endif | |
335 | ||
336 | static int | |
337 | find_bus_target_lun(int ctlr, int *bus, int *target, int *lun) | |
338 | { | |
339 | /* finds an unused bus, target, lun for a new device */ | |
340 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
341 | int i, found=0; | |
342 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
343 | ||
344 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
345 | ||
346 | target_taken[SELF_SCSI_ID] = 1; | |
347 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) | |
348 | target_taken[ccissscsi[ctlr].dev[i].target] = 1; | |
349 | ||
350 | for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) { | |
351 | if (!target_taken[i]) { | |
352 | *bus = 0; *target=i; *lun = 0; found=1; | |
353 | break; | |
354 | } | |
355 | } | |
356 | return (!found); | |
357 | } | |
f4a93bcd MM |
358 | struct scsi2map { |
359 | char scsi3addr[8]; | |
360 | int bus, target, lun; | |
361 | }; | |
1da177e4 LT |
362 | |
363 | static int | |
364 | cciss_scsi_add_entry(int ctlr, int hostno, | |
905bd78f | 365 | struct cciss_scsi_dev_t *device, |
f4a93bcd | 366 | struct scsi2map *added, int *nadded) |
1da177e4 LT |
367 | { |
368 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
369 | int n = ccissscsi[ctlr].ndevices; | |
370 | struct cciss_scsi_dev_t *sd; | |
935dc8d7 MM |
371 | int i, bus, target, lun; |
372 | unsigned char addr1[8], addr2[8]; | |
1da177e4 LT |
373 | |
374 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
375 | printk("cciss%d: Too many devices, " | |
376 | "some will be inaccessible.\n", ctlr); | |
377 | return -1; | |
378 | } | |
f4a93bcd | 379 | |
935dc8d7 MM |
380 | bus = target = -1; |
381 | lun = 0; | |
382 | /* Is this device a non-zero lun of a multi-lun device */ | |
383 | /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ | |
905bd78f | 384 | if (device->scsi3addr[4] != 0) { |
935dc8d7 MM |
385 | /* Search through our list and find the device which */ |
386 | /* has the same 8 byte LUN address, excepting byte 4. */ | |
387 | /* Assign the same bus and target for this new LUN. */ | |
388 | /* Use the logical unit number from the firmware. */ | |
905bd78f | 389 | memcpy(addr1, device->scsi3addr, 8); |
935dc8d7 MM |
390 | addr1[4] = 0; |
391 | for (i = 0; i < n; i++) { | |
392 | sd = &ccissscsi[ctlr].dev[i]; | |
393 | memcpy(addr2, sd->scsi3addr, 8); | |
394 | addr2[4] = 0; | |
395 | /* differ only in byte 4? */ | |
396 | if (memcmp(addr1, addr2, 8) == 0) { | |
397 | bus = sd->bus; | |
398 | target = sd->target; | |
905bd78f | 399 | lun = device->scsi3addr[4]; |
935dc8d7 MM |
400 | break; |
401 | } | |
402 | } | |
403 | } | |
404 | ||
405 | sd = &ccissscsi[ctlr].dev[n]; | |
406 | if (lun == 0) { | |
407 | if (find_bus_target_lun(ctlr, | |
408 | &sd->bus, &sd->target, &sd->lun) != 0) | |
409 | return -1; | |
410 | } else { | |
411 | sd->bus = bus; | |
412 | sd->target = target; | |
413 | sd->lun = lun; | |
414 | } | |
f4a93bcd MM |
415 | added[*nadded].bus = sd->bus; |
416 | added[*nadded].target = sd->target; | |
417 | added[*nadded].lun = sd->lun; | |
418 | (*nadded)++; | |
419 | ||
905bd78f | 420 | memcpy(sd->scsi3addr, device->scsi3addr, 8); |
421 | memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); | |
422 | memcpy(sd->revision, device->revision, sizeof(sd->revision)); | |
423 | memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); | |
424 | sd->devtype = device->devtype; | |
425 | ||
1da177e4 LT |
426 | ccissscsi[ctlr].ndevices++; |
427 | ||
428 | /* initially, (before registering with scsi layer) we don't | |
429 | know our hostno and we don't want to print anything first | |
430 | time anyway (the scsi layer's inquiries will show that info) */ | |
431 | if (hostno != -1) | |
432 | printk("cciss%d: %s device c%db%dt%dl%d added.\n", | |
4ff36718 | 433 | ctlr, scsi_device_type(sd->devtype), hostno, |
1da177e4 LT |
434 | sd->bus, sd->target, sd->lun); |
435 | return 0; | |
436 | } | |
437 | ||
438 | static void | |
f4a93bcd MM |
439 | cciss_scsi_remove_entry(int ctlr, int hostno, int entry, |
440 | struct scsi2map *removed, int *nremoved) | |
1da177e4 LT |
441 | { |
442 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
443 | int i; | |
444 | struct cciss_scsi_dev_t sd; | |
445 | ||
446 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
447 | sd = ccissscsi[ctlr].dev[entry]; | |
f4a93bcd MM |
448 | removed[*nremoved].bus = sd.bus; |
449 | removed[*nremoved].target = sd.target; | |
450 | removed[*nremoved].lun = sd.lun; | |
451 | (*nremoved)++; | |
1da177e4 LT |
452 | for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++) |
453 | ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1]; | |
454 | ccissscsi[ctlr].ndevices--; | |
455 | printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
4ff36718 | 456 | ctlr, scsi_device_type(sd.devtype), hostno, |
1da177e4 LT |
457 | sd.bus, sd.target, sd.lun); |
458 | } | |
459 | ||
460 | ||
461 | #define SCSI3ADDR_EQ(a,b) ( \ | |
462 | (a)[7] == (b)[7] && \ | |
463 | (a)[6] == (b)[6] && \ | |
464 | (a)[5] == (b)[5] && \ | |
465 | (a)[4] == (b)[4] && \ | |
466 | (a)[3] == (b)[3] && \ | |
467 | (a)[2] == (b)[2] && \ | |
468 | (a)[1] == (b)[1] && \ | |
469 | (a)[0] == (b)[0]) | |
470 | ||
f4a93bcd MM |
471 | static void fixup_botched_add(int ctlr, char *scsi3addr) |
472 | { | |
473 | /* called when scsi_add_device fails in order to re-adjust */ | |
474 | /* ccissscsi[] to match the mid layer's view. */ | |
475 | unsigned long flags; | |
476 | int i, j; | |
477 | CPQ_TAPE_LOCK(ctlr, flags); | |
478 | for (i = 0; i < ccissscsi[ctlr].ndevices; i++) { | |
479 | if (memcmp(scsi3addr, | |
480 | ccissscsi[ctlr].dev[i].scsi3addr, 8) == 0) { | |
481 | for (j = i; j < ccissscsi[ctlr].ndevices-1; j++) | |
482 | ccissscsi[ctlr].dev[j] = | |
483 | ccissscsi[ctlr].dev[j+1]; | |
484 | ccissscsi[ctlr].ndevices--; | |
485 | break; | |
486 | } | |
487 | } | |
488 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
489 | } | |
490 | ||
905bd78f | 491 | static int device_is_the_same(struct cciss_scsi_dev_t *dev1, |
492 | struct cciss_scsi_dev_t *dev2) | |
493 | { | |
494 | return dev1->devtype == dev2->devtype && | |
495 | memcmp(dev1->scsi3addr, dev2->scsi3addr, | |
496 | sizeof(dev1->scsi3addr)) == 0 && | |
497 | memcmp(dev1->device_id, dev2->device_id, | |
498 | sizeof(dev1->device_id)) == 0 && | |
499 | memcmp(dev1->vendor, dev2->vendor, | |
500 | sizeof(dev1->vendor)) == 0 && | |
501 | memcmp(dev1->model, dev2->model, | |
502 | sizeof(dev1->model)) == 0 && | |
503 | memcmp(dev1->revision, dev2->revision, | |
504 | sizeof(dev1->revision)) == 0; | |
505 | } | |
506 | ||
1da177e4 LT |
507 | static int |
508 | adjust_cciss_scsi_table(int ctlr, int hostno, | |
509 | struct cciss_scsi_dev_t sd[], int nsds) | |
510 | { | |
511 | /* sd contains scsi3 addresses and devtypes, but | |
512 | bus target and lun are not filled in. This funciton | |
513 | takes what's in sd to be the current and adjusts | |
514 | ccissscsi[] to be in line with what's in sd. */ | |
515 | ||
516 | int i,j, found, changes=0; | |
517 | struct cciss_scsi_dev_t *csd; | |
518 | unsigned long flags; | |
f4a93bcd MM |
519 | struct scsi2map *added, *removed; |
520 | int nadded, nremoved; | |
521 | struct Scsi_Host *sh = NULL; | |
522 | ||
523 | added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
524 | GFP_KERNEL); | |
525 | removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
526 | GFP_KERNEL); | |
527 | ||
528 | if (!added || !removed) { | |
529 | printk(KERN_WARNING "cciss%d: Out of memory in " | |
530 | "adjust_cciss_scsi_table\n", ctlr); | |
531 | goto free_and_out; | |
532 | } | |
1da177e4 LT |
533 | |
534 | CPQ_TAPE_LOCK(ctlr, flags); | |
535 | ||
f4a93bcd MM |
536 | if (hostno != -1) /* if it's not the first time... */ |
537 | sh = ((struct cciss_scsi_adapter_data_t *) | |
538 | hba[ctlr]->scsi_ctlr)->scsi_host; | |
539 | ||
1da177e4 LT |
540 | /* find any devices in ccissscsi[] that are not in |
541 | sd[] and remove them from ccissscsi[] */ | |
542 | ||
543 | i = 0; | |
f4a93bcd MM |
544 | nremoved = 0; |
545 | nadded = 0; | |
1da177e4 LT |
546 | while(i<ccissscsi[ctlr].ndevices) { |
547 | csd = &ccissscsi[ctlr].dev[i]; | |
548 | found=0; | |
549 | for (j=0;j<nsds;j++) { | |
550 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
551 | csd->scsi3addr)) { | |
905bd78f | 552 | if (device_is_the_same(&sd[j], csd)) |
1da177e4 LT |
553 | found=2; |
554 | else | |
555 | found=1; | |
556 | break; | |
557 | } | |
558 | } | |
559 | ||
560 | if (found == 0) { /* device no longer present. */ | |
561 | changes++; | |
562 | /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
4ff36718 | 563 | ctlr, scsi_device_type(csd->devtype), hostno, |
1da177e4 | 564 | csd->bus, csd->target, csd->lun); */ |
f4a93bcd MM |
565 | cciss_scsi_remove_entry(ctlr, hostno, i, |
566 | removed, &nremoved); | |
567 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 568 | } else if (found == 1) { /* device is different in some way */ |
1da177e4 | 569 | changes++; |
905bd78f | 570 | printk("cciss%d: device c%db%dt%dl%d has changed.\n", |
571 | ctlr, hostno, csd->bus, csd->target, csd->lun); | |
f4a93bcd MM |
572 | cciss_scsi_remove_entry(ctlr, hostno, i, |
573 | removed, &nremoved); | |
574 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 575 | if (cciss_scsi_add_entry(ctlr, hostno, &sd[j], |
f4a93bcd MM |
576 | added, &nadded) != 0) |
577 | /* we just removed one, so add can't fail. */ | |
578 | BUG(); | |
1da177e4 | 579 | csd->devtype = sd[j].devtype; |
905bd78f | 580 | memcpy(csd->device_id, sd[j].device_id, |
581 | sizeof(csd->device_id)); | |
582 | memcpy(csd->vendor, sd[j].vendor, | |
583 | sizeof(csd->vendor)); | |
584 | memcpy(csd->model, sd[j].model, | |
585 | sizeof(csd->model)); | |
586 | memcpy(csd->revision, sd[j].revision, | |
587 | sizeof(csd->revision)); | |
1da177e4 LT |
588 | } else /* device is same as it ever was, */ |
589 | i++; /* so just move along. */ | |
590 | } | |
591 | ||
592 | /* Now, make sure every device listed in sd[] is also | |
593 | listed in ccissscsi[], adding them if they aren't found */ | |
594 | ||
595 | for (i=0;i<nsds;i++) { | |
596 | found=0; | |
597 | for (j=0;j<ccissscsi[ctlr].ndevices;j++) { | |
598 | csd = &ccissscsi[ctlr].dev[j]; | |
599 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, | |
600 | csd->scsi3addr)) { | |
905bd78f | 601 | if (device_is_the_same(&sd[i], csd)) |
1da177e4 LT |
602 | found=2; /* found device */ |
603 | else | |
604 | found=1; /* found a bug. */ | |
605 | break; | |
606 | } | |
607 | } | |
608 | if (!found) { | |
609 | changes++; | |
905bd78f | 610 | if (cciss_scsi_add_entry(ctlr, hostno, &sd[i], |
f4a93bcd | 611 | added, &nadded) != 0) |
1da177e4 LT |
612 | break; |
613 | } else if (found == 1) { | |
614 | /* should never happen... */ | |
615 | changes++; | |
905bd78f | 616 | printk(KERN_WARNING "cciss%d: device " |
617 | "unexpectedly changed\n", ctlr); | |
1da177e4 LT |
618 | /* but if it does happen, we just ignore that device */ |
619 | } | |
620 | } | |
621 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
622 | ||
f4a93bcd MM |
623 | /* Don't notify scsi mid layer of any changes the first time through */ |
624 | /* (or if there are no changes) scsi_scan_host will do it later the */ | |
625 | /* first time through. */ | |
626 | if (hostno == -1 || !changes) | |
627 | goto free_and_out; | |
628 | ||
629 | /* Notify scsi mid layer of any removed devices */ | |
630 | for (i = 0; i < nremoved; i++) { | |
631 | struct scsi_device *sdev = | |
632 | scsi_device_lookup(sh, removed[i].bus, | |
633 | removed[i].target, removed[i].lun); | |
634 | if (sdev != NULL) { | |
635 | scsi_remove_device(sdev); | |
636 | scsi_device_put(sdev); | |
637 | } else { | |
638 | /* We don't expect to get here. */ | |
639 | /* future cmds to this device will get selection */ | |
640 | /* timeout as if the device was gone. */ | |
641 | printk(KERN_WARNING "cciss%d: didn't find " | |
642 | "c%db%dt%dl%d\n for removal.", | |
643 | ctlr, hostno, removed[i].bus, | |
644 | removed[i].target, removed[i].lun); | |
645 | } | |
646 | } | |
647 | ||
648 | /* Notify scsi mid layer of any added devices */ | |
649 | for (i = 0; i < nadded; i++) { | |
650 | int rc; | |
651 | rc = scsi_add_device(sh, added[i].bus, | |
652 | added[i].target, added[i].lun); | |
653 | if (rc == 0) | |
654 | continue; | |
655 | printk(KERN_WARNING "cciss%d: scsi_add_device " | |
656 | "c%db%dt%dl%d failed, device not added.\n", | |
657 | ctlr, hostno, | |
658 | added[i].bus, added[i].target, added[i].lun); | |
659 | /* now we have to remove it from ccissscsi, */ | |
660 | /* since it didn't get added to scsi mid layer */ | |
661 | fixup_botched_add(ctlr, added[i].scsi3addr); | |
662 | } | |
1da177e4 | 663 | |
f4a93bcd MM |
664 | free_and_out: |
665 | kfree(added); | |
666 | kfree(removed); | |
1da177e4 LT |
667 | return 0; |
668 | } | |
669 | ||
670 | static int | |
671 | lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr) | |
672 | { | |
673 | int i; | |
674 | struct cciss_scsi_dev_t *sd; | |
675 | unsigned long flags; | |
676 | ||
677 | CPQ_TAPE_LOCK(ctlr, flags); | |
678 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) { | |
679 | sd = &ccissscsi[ctlr].dev[i]; | |
680 | if (sd->bus == bus && | |
681 | sd->target == target && | |
682 | sd->lun == lun) { | |
683 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
684 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
685 | return 0; | |
686 | } | |
687 | } | |
688 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
689 | return -1; | |
690 | } | |
691 | ||
692 | static void | |
693 | cciss_scsi_setup(int cntl_num) | |
694 | { | |
695 | struct cciss_scsi_adapter_data_t * shba; | |
696 | ||
697 | ccissscsi[cntl_num].ndevices = 0; | |
698 | shba = (struct cciss_scsi_adapter_data_t *) | |
699 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
700 | if (shba == NULL) | |
701 | return; | |
702 | shba->scsi_host = NULL; | |
703 | spin_lock_init(&shba->lock); | |
704 | shba->registered = 0; | |
705 | if (scsi_cmd_stack_setup(cntl_num, shba) != 0) { | |
706 | kfree(shba); | |
707 | shba = NULL; | |
708 | } | |
709 | hba[cntl_num]->scsi_ctlr = (void *) shba; | |
710 | return; | |
711 | } | |
712 | ||
713 | static void | |
714 | complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag) | |
715 | { | |
716 | struct scsi_cmnd *cmd; | |
717 | ctlr_info_t *ctlr; | |
1da177e4 LT |
718 | ErrorInfo_struct *ei; |
719 | ||
720 | ei = cp->err_info; | |
721 | ||
722 | /* First, see if it was a message rather than a command */ | |
723 | if (cp->Request.Type.Type == TYPE_MSG) { | |
724 | cp->cmd_type = CMD_MSG_DONE; | |
725 | return; | |
726 | } | |
727 | ||
728 | cmd = (struct scsi_cmnd *) cp->scsi_cmd; | |
729 | ctlr = hba[cp->ctlr]; | |
730 | ||
41ce639a | 731 | scsi_dma_unmap(cmd); |
1da177e4 LT |
732 | |
733 | cmd->result = (DID_OK << 16); /* host byte */ | |
734 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
735 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
736 | ||
737 | cmd->result |= (ei->ScsiStatus); | |
738 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
739 | ||
740 | /* copy the sense data whether we need to or not. */ | |
741 | ||
742 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
743 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
744 | SCSI_SENSE_BUFFERSIZE : | |
745 | ei->SenseLen); | |
41ce639a | 746 | scsi_set_resid(cmd, ei->ResidualCnt); |
1da177e4 LT |
747 | |
748 | if(ei->CommandStatus != 0) | |
749 | { /* an error has occurred */ | |
750 | switch(ei->CommandStatus) | |
751 | { | |
752 | case CMD_TARGET_STATUS: | |
753 | /* Pass it up to the upper layers... */ | |
754 | if( ei->ScsiStatus) | |
755 | { | |
756 | #if 0 | |
757 | printk(KERN_WARNING "cciss: cmd %p " | |
758 | "has SCSI Status = %x\n", | |
759 | cp, | |
760 | ei->ScsiStatus); | |
761 | #endif | |
b0e15f6d | 762 | cmd->result |= (ei->ScsiStatus << 1); |
1da177e4 LT |
763 | } |
764 | else { /* scsi status is zero??? How??? */ | |
765 | ||
766 | /* Ordinarily, this case should never happen, but there is a bug | |
767 | in some released firmware revisions that allows it to happen | |
768 | if, for example, a 4100 backplane loses power and the tape | |
769 | drive is in it. We assume that it's a fatal error of some | |
770 | kind because we can't show that it wasn't. We will make it | |
771 | look like selection timeout since that is the most common | |
772 | reason for this to occur, and it's severe enough. */ | |
773 | ||
774 | cmd->result = DID_NO_CONNECT << 16; | |
775 | } | |
776 | break; | |
777 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
778 | break; | |
779 | case CMD_DATA_OVERRUN: | |
780 | printk(KERN_WARNING "cciss: cp %p has" | |
781 | " completed with data overrun " | |
782 | "reported\n", cp); | |
783 | break; | |
784 | case CMD_INVALID: { | |
785 | /* print_bytes(cp, sizeof(*cp), 1, 0); | |
786 | print_cmd(cp); */ | |
787 | /* We get CMD_INVALID if you address a non-existent tape drive instead | |
788 | of a selection timeout (no response). You will see this if you yank | |
789 | out a tape drive, then try to access it. This is kind of a shame | |
790 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
791 | get interpreted as a missing target. */ | |
792 | cmd->result = DID_NO_CONNECT << 16; | |
793 | } | |
794 | break; | |
795 | case CMD_PROTOCOL_ERR: | |
796 | printk(KERN_WARNING "cciss: cp %p has " | |
797 | "protocol error \n", cp); | |
798 | break; | |
799 | case CMD_HARDWARE_ERR: | |
800 | cmd->result = DID_ERROR << 16; | |
801 | printk(KERN_WARNING "cciss: cp %p had " | |
802 | " hardware error\n", cp); | |
803 | break; | |
804 | case CMD_CONNECTION_LOST: | |
805 | cmd->result = DID_ERROR << 16; | |
806 | printk(KERN_WARNING "cciss: cp %p had " | |
807 | "connection lost\n", cp); | |
808 | break; | |
809 | case CMD_ABORTED: | |
810 | cmd->result = DID_ABORT << 16; | |
811 | printk(KERN_WARNING "cciss: cp %p was " | |
812 | "aborted\n", cp); | |
813 | break; | |
814 | case CMD_ABORT_FAILED: | |
815 | cmd->result = DID_ERROR << 16; | |
816 | printk(KERN_WARNING "cciss: cp %p reports " | |
817 | "abort failed\n", cp); | |
818 | break; | |
819 | case CMD_UNSOLICITED_ABORT: | |
820 | cmd->result = DID_ABORT << 16; | |
821 | printk(KERN_WARNING "cciss: cp %p aborted " | |
822 | "do to an unsolicited abort\n", cp); | |
823 | break; | |
824 | case CMD_TIMEOUT: | |
825 | cmd->result = DID_TIME_OUT << 16; | |
826 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
827 | cp); | |
828 | break; | |
829 | default: | |
830 | cmd->result = DID_ERROR << 16; | |
831 | printk(KERN_WARNING "cciss: cp %p returned " | |
832 | "unknown status %x\n", cp, | |
833 | ei->CommandStatus); | |
834 | } | |
835 | } | |
836 | // printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel, | |
837 | // cmd->target, cmd->lun); | |
838 | cmd->scsi_done(cmd); | |
839 | scsi_cmd_free(ctlr, cp); | |
840 | } | |
841 | ||
842 | static int | |
843 | cciss_scsi_detect(int ctlr) | |
844 | { | |
845 | struct Scsi_Host *sh; | |
846 | int error; | |
847 | ||
848 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
849 | if (sh == NULL) | |
850 | goto fail; | |
851 | sh->io_port = 0; // good enough? FIXME, | |
852 | sh->n_io_port = 0; // I don't think we use these two... | |
853 | sh->this_id = SELF_SCSI_ID; | |
854 | ||
855 | ((struct cciss_scsi_adapter_data_t *) | |
856 | hba[ctlr]->scsi_ctlr)->scsi_host = (void *) sh; | |
857 | sh->hostdata[0] = (unsigned long) hba[ctlr]; | |
fb86a35b | 858 | sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT]; |
1da177e4 LT |
859 | sh->unique_id = sh->irq; |
860 | error = scsi_add_host(sh, &hba[ctlr]->pdev->dev); | |
861 | if (error) | |
862 | goto fail_host_put; | |
863 | scsi_scan_host(sh); | |
864 | return 1; | |
865 | ||
866 | fail_host_put: | |
867 | scsi_host_put(sh); | |
868 | fail: | |
869 | return 0; | |
870 | } | |
871 | ||
872 | static void | |
873 | cciss_unmap_one(struct pci_dev *pdev, | |
874 | CommandList_struct *cp, | |
875 | size_t buflen, | |
876 | int data_direction) | |
877 | { | |
878 | u64bit addr64; | |
879 | ||
880 | addr64.val32.lower = cp->SG[0].Addr.lower; | |
881 | addr64.val32.upper = cp->SG[0].Addr.upper; | |
882 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); | |
883 | } | |
884 | ||
885 | static void | |
886 | cciss_map_one(struct pci_dev *pdev, | |
887 | CommandList_struct *cp, | |
888 | unsigned char *buf, | |
889 | size_t buflen, | |
890 | int data_direction) | |
891 | { | |
892 | __u64 addr64; | |
893 | ||
894 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
895 | cp->SG[0].Addr.lower = | |
896 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
897 | cp->SG[0].Addr.upper = | |
898 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
899 | cp->SG[0].Len = buflen; | |
900 | cp->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
901 | cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
902 | } | |
903 | ||
904 | static int | |
905 | cciss_scsi_do_simple_cmd(ctlr_info_t *c, | |
906 | CommandList_struct *cp, | |
907 | unsigned char *scsi3addr, | |
908 | unsigned char *cdb, | |
909 | unsigned char cdblen, | |
910 | unsigned char *buf, int bufsize, | |
911 | int direction) | |
912 | { | |
913 | unsigned long flags; | |
6e9a4738 | 914 | DECLARE_COMPLETION_ONSTACK(wait); |
1da177e4 LT |
915 | |
916 | cp->cmd_type = CMD_IOCTL_PEND; // treat this like an ioctl | |
917 | cp->scsi_cmd = NULL; | |
918 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
919 | memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN)); | |
920 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
921 | // Fill in the request block... | |
922 | ||
923 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
924 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
925 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
926 | ||
927 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
928 | memcpy(cp->Request.CDB, cdb, cdblen); | |
929 | cp->Request.Timeout = 0; | |
930 | cp->Request.CDBLen = cdblen; | |
931 | cp->Request.Type.Type = TYPE_CMD; | |
932 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
933 | cp->Request.Type.Direction = direction; | |
934 | ||
935 | /* Fill in the SG list and do dma mapping */ | |
936 | cciss_map_one(c->pdev, cp, (unsigned char *) buf, | |
937 | bufsize, DMA_FROM_DEVICE); | |
938 | ||
939 | cp->waiting = &wait; | |
940 | ||
941 | /* Put the request on the tail of the request queue */ | |
942 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
943 | addQ(&c->reqQ, cp); | |
944 | c->Qdepth++; | |
945 | start_io(c); | |
946 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
947 | ||
948 | wait_for_completion(&wait); | |
949 | ||
950 | /* undo the dma mapping */ | |
951 | cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE); | |
952 | return(0); | |
953 | } | |
954 | ||
955 | static void | |
956 | cciss_scsi_interpret_error(CommandList_struct *cp) | |
957 | { | |
958 | ErrorInfo_struct *ei; | |
959 | ||
960 | ei = cp->err_info; | |
961 | switch(ei->CommandStatus) | |
962 | { | |
963 | case CMD_TARGET_STATUS: | |
964 | printk(KERN_WARNING "cciss: cmd %p has " | |
965 | "completed with errors\n", cp); | |
966 | printk(KERN_WARNING "cciss: cmd %p " | |
967 | "has SCSI Status = %x\n", | |
968 | cp, | |
969 | ei->ScsiStatus); | |
970 | if (ei->ScsiStatus == 0) | |
971 | printk(KERN_WARNING | |
972 | "cciss:SCSI status is abnormally zero. " | |
973 | "(probably indicates selection timeout " | |
974 | "reported incorrectly due to a known " | |
975 | "firmware bug, circa July, 2001.)\n"); | |
976 | break; | |
977 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
978 | printk("UNDERRUN\n"); | |
979 | break; | |
980 | case CMD_DATA_OVERRUN: | |
981 | printk(KERN_WARNING "cciss: cp %p has" | |
982 | " completed with data overrun " | |
983 | "reported\n", cp); | |
984 | break; | |
985 | case CMD_INVALID: { | |
986 | /* controller unfortunately reports SCSI passthru's */ | |
987 | /* to non-existent targets as invalid commands. */ | |
988 | printk(KERN_WARNING "cciss: cp %p is " | |
989 | "reported invalid (probably means " | |
990 | "target device no longer present)\n", | |
991 | cp); | |
992 | /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0); | |
993 | print_cmd(cp); */ | |
994 | } | |
995 | break; | |
996 | case CMD_PROTOCOL_ERR: | |
997 | printk(KERN_WARNING "cciss: cp %p has " | |
998 | "protocol error \n", cp); | |
999 | break; | |
1000 | case CMD_HARDWARE_ERR: | |
1001 | /* cmd->result = DID_ERROR << 16; */ | |
1002 | printk(KERN_WARNING "cciss: cp %p had " | |
1003 | " hardware error\n", cp); | |
1004 | break; | |
1005 | case CMD_CONNECTION_LOST: | |
1006 | printk(KERN_WARNING "cciss: cp %p had " | |
1007 | "connection lost\n", cp); | |
1008 | break; | |
1009 | case CMD_ABORTED: | |
1010 | printk(KERN_WARNING "cciss: cp %p was " | |
1011 | "aborted\n", cp); | |
1012 | break; | |
1013 | case CMD_ABORT_FAILED: | |
1014 | printk(KERN_WARNING "cciss: cp %p reports " | |
1015 | "abort failed\n", cp); | |
1016 | break; | |
1017 | case CMD_UNSOLICITED_ABORT: | |
1018 | printk(KERN_WARNING "cciss: cp %p aborted " | |
1019 | "do to an unsolicited abort\n", cp); | |
1020 | break; | |
1021 | case CMD_TIMEOUT: | |
1022 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
1023 | cp); | |
1024 | break; | |
1025 | default: | |
1026 | printk(KERN_WARNING "cciss: cp %p returned " | |
1027 | "unknown status %x\n", cp, | |
1028 | ei->CommandStatus); | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | static int | |
1033 | cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr, | |
905bd78f | 1034 | unsigned char page, unsigned char *buf, |
1035 | unsigned char bufsize) | |
1da177e4 LT |
1036 | { |
1037 | int rc; | |
1038 | CommandList_struct *cp; | |
1039 | char cdb[6]; | |
1040 | ErrorInfo_struct *ei; | |
1041 | unsigned long flags; | |
1042 | ||
1043 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1044 | cp = scsi_cmd_alloc(c); | |
1045 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1046 | ||
1047 | if (cp == NULL) { /* trouble... */ | |
1048 | printk("cmd_alloc returned NULL!\n"); | |
1049 | return -1; | |
1050 | } | |
1051 | ||
1052 | ei = cp->err_info; | |
1053 | ||
1054 | cdb[0] = CISS_INQUIRY; | |
905bd78f | 1055 | cdb[1] = (page != 0); |
1056 | cdb[2] = page; | |
1da177e4 | 1057 | cdb[3] = 0; |
47922d06 | 1058 | cdb[4] = bufsize; |
1da177e4 LT |
1059 | cdb[5] = 0; |
1060 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb, | |
47922d06 | 1061 | 6, buf, bufsize, XFER_READ); |
1da177e4 LT |
1062 | |
1063 | if (rc != 0) return rc; /* something went wrong */ | |
1064 | ||
1065 | if (ei->CommandStatus != 0 && | |
1066 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
1067 | cciss_scsi_interpret_error(cp); | |
1068 | rc = -1; | |
1069 | } | |
1070 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1071 | scsi_cmd_free(c, cp); | |
1072 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1073 | return rc; | |
1074 | } | |
1075 | ||
905bd78f | 1076 | /* Get the device id from inquiry page 0x83 */ |
1077 | static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr, | |
1078 | unsigned char *device_id, int buflen) | |
1079 | { | |
1080 | int rc; | |
1081 | unsigned char *buf; | |
1082 | ||
1083 | if (buflen > 16) | |
1084 | buflen = 16; | |
1085 | buf = kzalloc(64, GFP_KERNEL); | |
1086 | if (!buf) | |
1087 | return -1; | |
1088 | rc = cciss_scsi_do_inquiry(c, scsi3addr, 0x83, buf, 64); | |
1089 | if (rc == 0) | |
1090 | memcpy(device_id, &buf[8], buflen); | |
1091 | kfree(buf); | |
1092 | return rc != 0; | |
1093 | } | |
1094 | ||
1da177e4 LT |
1095 | static int |
1096 | cciss_scsi_do_report_phys_luns(ctlr_info_t *c, | |
1097 | ReportLunData_struct *buf, int bufsize) | |
1098 | { | |
1099 | int rc; | |
1100 | CommandList_struct *cp; | |
1101 | unsigned char cdb[12]; | |
1102 | unsigned char scsi3addr[8]; | |
1103 | ErrorInfo_struct *ei; | |
1104 | unsigned long flags; | |
1105 | ||
1106 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1107 | cp = scsi_cmd_alloc(c); | |
1108 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1109 | if (cp == NULL) { /* trouble... */ | |
1110 | printk("cmd_alloc returned NULL!\n"); | |
1111 | return -1; | |
1112 | } | |
1113 | ||
1114 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
1115 | cdb[0] = CISS_REPORT_PHYS; | |
1116 | cdb[1] = 0; | |
1117 | cdb[2] = 0; | |
1118 | cdb[3] = 0; | |
1119 | cdb[4] = 0; | |
1120 | cdb[5] = 0; | |
1121 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
1122 | cdb[7] = (bufsize >> 16) & 0xFF; | |
1123 | cdb[8] = (bufsize >> 8) & 0xFF; | |
1124 | cdb[9] = bufsize & 0xFF; | |
1125 | cdb[10] = 0; | |
1126 | cdb[11] = 0; | |
1127 | ||
1128 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, | |
1129 | cdb, 12, | |
1130 | (unsigned char *) buf, | |
1131 | bufsize, XFER_READ); | |
1132 | ||
1133 | if (rc != 0) return rc; /* something went wrong */ | |
1134 | ||
1135 | ei = cp->err_info; | |
1136 | if (ei->CommandStatus != 0 && | |
1137 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
1138 | cciss_scsi_interpret_error(cp); | |
1139 | rc = -1; | |
1140 | } | |
1141 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1142 | scsi_cmd_free(c, cp); | |
1143 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1144 | return rc; | |
1145 | } | |
1146 | ||
1147 | static void | |
1148 | cciss_update_non_disk_devices(int cntl_num, int hostno) | |
1149 | { | |
1150 | /* the idea here is we could get notified from /proc | |
1151 | that some devices have changed, so we do a report | |
1152 | physical luns cmd, and adjust our list of devices | |
1153 | accordingly. (We can't rely on the scsi-mid layer just | |
1154 | doing inquiries, because the "busses" that the scsi | |
1155 | mid-layer probes are totally fabricated by this driver, | |
1156 | so new devices wouldn't show up. | |
1157 | ||
1158 | the scsi3addr's of devices won't change so long as the | |
1159 | adapter is not reset. That means we can rescan and | |
1160 | tell which devices we already know about, vs. new | |
1161 | devices, vs. disappearing devices. | |
1162 | ||
1163 | Also, if you yank out a tape drive, then put in a disk | |
1164 | in it's place, (say, a configured volume from another | |
1165 | array controller for instance) _don't_ poke this driver | |
1166 | (so it thinks it's still a tape, but _do_ poke the scsi | |
1167 | mid layer, so it does an inquiry... the scsi mid layer | |
1168 | will see the physical disk. This would be bad. Need to | |
1169 | think about how to prevent that. One idea would be to | |
1170 | snoop all scsi responses and if an inquiry repsonse comes | |
1171 | back that reports a disk, chuck it an return selection | |
1172 | timeout instead and adjust our table... Not sure i like | |
1173 | that though. | |
1174 | ||
1175 | */ | |
47922d06 MM |
1176 | #define OBDR_TAPE_INQ_SIZE 49 |
1177 | #define OBDR_TAPE_SIG "$DR-10" | |
1da177e4 | 1178 | ReportLunData_struct *ld_buff; |
47922d06 | 1179 | unsigned char *inq_buff; |
1da177e4 LT |
1180 | unsigned char scsi3addr[8]; |
1181 | ctlr_info_t *c; | |
1182 | __u32 num_luns=0; | |
1183 | unsigned char *ch; | |
905bd78f | 1184 | struct cciss_scsi_dev_t *currentsd, *this_device; |
1da177e4 LT |
1185 | int ncurrent=0; |
1186 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1187 | int i; | |
1188 | ||
1189 | c = (ctlr_info_t *) hba[cntl_num]; | |
06ff37ff | 1190 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
47922d06 | 1191 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
905bd78f | 1192 | currentsd = kzalloc(sizeof(*currentsd) * |
1193 | (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); | |
1194 | if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { | |
1195 | printk(KERN_ERR "cciss: out of memory\n"); | |
1196 | goto out; | |
1da177e4 | 1197 | } |
905bd78f | 1198 | this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
1da177e4 LT |
1199 | if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) { |
1200 | ch = &ld_buff->LUNListLength[0]; | |
1201 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1202 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1203 | printk(KERN_WARNING | |
1204 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1205 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1206 | num_luns - CISS_MAX_PHYS_LUN); | |
1207 | num_luns = CISS_MAX_PHYS_LUN; | |
1208 | } | |
1209 | } | |
1210 | else { | |
1211 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1212 | goto out; | |
1213 | } | |
1214 | ||
1215 | ||
1216 | /* adjust our table of devices */ | |
905bd78f | 1217 | for (i = 0; i < num_luns; i++) { |
1da177e4 LT |
1218 | /* for each physical lun, do an inquiry */ |
1219 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
47922d06 | 1220 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
1da177e4 LT |
1221 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
1222 | ||
905bd78f | 1223 | if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, 0, inq_buff, |
1224 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) | |
1da177e4 | 1225 | /* Inquiry failed (msg printed already) */ |
905bd78f | 1226 | continue; /* so we will skip this device. */ |
1227 | ||
1228 | this_device->devtype = (inq_buff[0] & 0x1f); | |
1229 | this_device->bus = -1; | |
1230 | this_device->target = -1; | |
1231 | this_device->lun = -1; | |
1232 | memcpy(this_device->scsi3addr, scsi3addr, 8); | |
1233 | memcpy(this_device->vendor, &inq_buff[8], | |
1234 | sizeof(this_device->vendor)); | |
1235 | memcpy(this_device->model, &inq_buff[16], | |
1236 | sizeof(this_device->model)); | |
1237 | memcpy(this_device->revision, &inq_buff[32], | |
1238 | sizeof(this_device->revision)); | |
1239 | memset(this_device->device_id, 0, | |
1240 | sizeof(this_device->device_id)); | |
1241 | cciss_scsi_get_device_id(hba[cntl_num], scsi3addr, | |
1242 | this_device->device_id, sizeof(this_device->device_id)); | |
1243 | ||
1244 | switch (this_device->devtype) | |
1da177e4 | 1245 | { |
47922d06 MM |
1246 | case 0x05: /* CD-ROM */ { |
1247 | ||
1248 | /* We don't *really* support actual CD-ROM devices, | |
1249 | * just this "One Button Disaster Recovery" tape drive | |
1250 | * which temporarily pretends to be a CD-ROM drive. | |
1251 | * So we check that the device is really an OBDR tape | |
1252 | * device by checking for "$DR-10" in bytes 43-48 of | |
1253 | * the inquiry data. | |
1254 | */ | |
1255 | char obdr_sig[7]; | |
1256 | ||
1257 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1258 | obdr_sig[6] = '\0'; | |
1259 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1260 | /* Not OBDR device, ignore it. */ | |
1261 | break; | |
1262 | } | |
1263 | /* fall through . . . */ | |
1da177e4 LT |
1264 | case 0x01: /* sequential access, (tape) */ |
1265 | case 0x08: /* medium changer */ | |
1266 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1267 | printk(KERN_INFO "cciss%d: %s ignored, " | |
1268 | "too many devices.\n", cntl_num, | |
905bd78f | 1269 | scsi_device_type(this_device->devtype)); |
1da177e4 LT |
1270 | break; |
1271 | } | |
905bd78f | 1272 | currentsd[ncurrent] = *this_device; |
1da177e4 LT |
1273 | ncurrent++; |
1274 | break; | |
1275 | default: | |
1276 | break; | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent); | |
1281 | out: | |
1282 | kfree(inq_buff); | |
1283 | kfree(ld_buff); | |
905bd78f | 1284 | kfree(currentsd); |
1da177e4 LT |
1285 | return; |
1286 | } | |
1287 | ||
1288 | static int | |
1289 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1290 | { | |
1291 | int verb_len = strlen(verb); | |
1292 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1293 | return verb_len; | |
1294 | else | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | static int | |
1299 | cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length) | |
1300 | { | |
1301 | int arg_len; | |
1302 | ||
1303 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
1304 | cciss_update_non_disk_devices(ctlr, hostno); | |
1305 | else | |
1306 | return -EINVAL; | |
1307 | return length; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | static int | |
1312 | cciss_scsi_proc_info(struct Scsi_Host *sh, | |
1313 | char *buffer, /* data buffer */ | |
1314 | char **start, /* where data in buffer starts */ | |
1315 | off_t offset, /* offset from start of imaginary file */ | |
1316 | int length, /* length of data in buffer */ | |
1317 | int func) /* 0 == read, 1 == write */ | |
1318 | { | |
1319 | ||
1320 | int buflen, datalen; | |
1321 | ctlr_info_t *ci; | |
b9f0bd08 | 1322 | int i; |
1da177e4 LT |
1323 | int cntl_num; |
1324 | ||
1325 | ||
1326 | ci = (ctlr_info_t *) sh->hostdata[0]; | |
1327 | if (ci == NULL) /* This really shouldn't ever happen. */ | |
1328 | return -EINVAL; | |
1329 | ||
1330 | cntl_num = ci->ctlr; /* Get our index into the hba[] array */ | |
1331 | ||
1332 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ | |
b9f0bd08 MM |
1333 | buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", |
1334 | cntl_num, sh->host_no); | |
1335 | ||
1336 | /* this information is needed by apps to know which cciss | |
1337 | device corresponds to which scsi host number without | |
1338 | having to open a scsi target device node. The device | |
1339 | information is not a duplicate of /proc/scsi/scsi because | |
1340 | the two may be out of sync due to scsi hotplug, rather | |
1341 | this info is for an app to be able to use to know how to | |
1342 | get them back in sync. */ | |
1343 | ||
1344 | for (i=0;i<ccissscsi[cntl_num].ndevices;i++) { | |
1345 | struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i]; | |
1346 | buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " | |
1347 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1348 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1349 | sd->devtype, | |
1350 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1351 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1352 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1353 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1354 | } | |
1da177e4 LT |
1355 | datalen = buflen - offset; |
1356 | if (datalen < 0) { /* they're reading past EOF. */ | |
1357 | datalen = 0; | |
1358 | *start = buffer+buflen; | |
1359 | } else | |
1360 | *start = buffer + offset; | |
1361 | return(datalen); | |
1362 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ | |
1363 | return cciss_scsi_user_command(cntl_num, sh->host_no, | |
1364 | buffer, length); | |
1365 | } | |
1366 | ||
1367 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1368 | dma mapping and fills in the scatter gather entries of the | |
1369 | cciss command, cp. */ | |
1370 | ||
1371 | static void | |
1372 | cciss_scatter_gather(struct pci_dev *pdev, | |
1373 | CommandList_struct *cp, | |
1374 | struct scsi_cmnd *cmd) | |
1375 | { | |
41ce639a FT |
1376 | unsigned int len; |
1377 | struct scatterlist *sg; | |
1da177e4 | 1378 | __u64 addr64; |
41ce639a FT |
1379 | int use_sg, i; |
1380 | ||
1381 | BUG_ON(scsi_sg_count(cmd) > MAXSGENTRIES); | |
1382 | ||
1383 | use_sg = scsi_dma_map(cmd); | |
1384 | if (use_sg) { /* not too many addrs? */ | |
1385 | scsi_for_each_sg(cmd, sg, use_sg, i) { | |
1386 | addr64 = (__u64) sg_dma_address(sg); | |
1387 | len = sg_dma_len(sg); | |
1388 | cp->SG[i].Addr.lower = | |
1389 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
1390 | cp->SG[i].Addr.upper = | |
1391 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
1392 | cp->SG[i].Len = len; | |
1393 | cp->SG[i].Ext = 0; // we are not chaining | |
1da177e4 | 1394 | } |
41ce639a | 1395 | } |
1da177e4 | 1396 | |
41ce639a FT |
1397 | cp->Header.SGList = (__u8) use_sg; /* no. SGs contig in this cmd */ |
1398 | cp->Header.SGTotal = (__u16) use_sg; /* total sgs in this cmd list */ | |
1da177e4 LT |
1399 | return; |
1400 | } | |
1401 | ||
1402 | ||
1403 | static int | |
1404 | cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) | |
1405 | { | |
1406 | ctlr_info_t **c; | |
1407 | int ctlr, rc; | |
1408 | unsigned char scsi3addr[8]; | |
1409 | CommandList_struct *cp; | |
1410 | unsigned long flags; | |
1411 | ||
1412 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1413 | // We violate cmd->host privacy here. (Is there another way?) | |
1414 | c = (ctlr_info_t **) &cmd->device->host->hostdata[0]; | |
1415 | ctlr = (*c)->ctlr; | |
1416 | ||
1417 | rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id, | |
1418 | cmd->device->lun, scsi3addr); | |
1419 | if (rc != 0) { | |
1420 | /* the scsi nexus does not match any that we presented... */ | |
1421 | /* pretend to mid layer that we got selection timeout */ | |
1422 | cmd->result = DID_NO_CONNECT << 16; | |
1423 | done(cmd); | |
1424 | /* we might want to think about registering controller itself | |
1425 | as a processor device on the bus so sg binds to it. */ | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | /* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n", | |
1430 | cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/ | |
1431 | // printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel, | |
1432 | // cmd->target, cmd->lun); | |
1433 | ||
1434 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and | |
1435 | see what the device thinks of it. */ | |
1436 | ||
1437 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1438 | cp = scsi_cmd_alloc(*c); | |
1439 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1440 | if (cp == NULL) { /* trouble... */ | |
1441 | printk("scsi_cmd_alloc returned NULL!\n"); | |
1442 | /* FIXME: next 3 lines are -> BAD! <- */ | |
1443 | cmd->result = DID_NO_CONNECT << 16; | |
1444 | done(cmd); | |
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | // Fill in the command list header | |
1449 | ||
1450 | cmd->scsi_done = done; // save this for use by completion code | |
1451 | ||
1452 | // save cp in case we have to abort it | |
1453 | cmd->host_scribble = (unsigned char *) cp; | |
1454 | ||
1455 | cp->cmd_type = CMD_SCSI; | |
1456 | cp->scsi_cmd = cmd; | |
1457 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
1458 | memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1459 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
1460 | ||
1461 | // Fill in the request block... | |
1462 | ||
1463 | cp->Request.Timeout = 0; | |
1464 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
089fe1b2 | 1465 | BUG_ON(cmd->cmd_len > sizeof(cp->Request.CDB)); |
1da177e4 LT |
1466 | cp->Request.CDBLen = cmd->cmd_len; |
1467 | memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1468 | cp->Request.Type.Type = TYPE_CMD; | |
1469 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
1470 | switch(cmd->sc_data_direction) | |
1471 | { | |
1472 | case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break; | |
1473 | case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break; | |
1474 | case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break; | |
1475 | case DMA_BIDIRECTIONAL: | |
1476 | // This can happen if a buggy application does a scsi passthru | |
1477 | // and sets both inlen and outlen to non-zero. ( see | |
1478 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1479 | ||
1480 | cp->Request.Type.Direction = XFER_RSVD; | |
1481 | // This is technically wrong, and cciss controllers should | |
1482 | // reject it with CMD_INVALID, which is the most correct | |
1483 | // response, but non-fibre backends appear to let it | |
1484 | // slide by, and give the same results as if this field | |
1485 | // were set correctly. Either way is acceptable for | |
1486 | // our purposes here. | |
1487 | ||
1488 | break; | |
1489 | ||
1490 | default: | |
1491 | printk("cciss: unknown data direction: %d\n", | |
1492 | cmd->sc_data_direction); | |
1493 | BUG(); | |
1494 | break; | |
1495 | } | |
1496 | ||
1497 | cciss_scatter_gather((*c)->pdev, cp, cmd); // Fill the SG list | |
1498 | ||
1499 | /* Put the request on the tail of the request queue */ | |
1500 | ||
1501 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1502 | addQ(&(*c)->reqQ, cp); | |
1503 | (*c)->Qdepth++; | |
1504 | start_io(*c); | |
1505 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1506 | ||
1507 | /* the cmd'll come back via intr handler in complete_scsi_command() */ | |
1508 | return 0; | |
1509 | } | |
1510 | ||
1511 | static void | |
1512 | cciss_unregister_scsi(int ctlr) | |
1513 | { | |
1514 | struct cciss_scsi_adapter_data_t *sa; | |
1515 | struct cciss_scsi_cmd_stack_t *stk; | |
1516 | unsigned long flags; | |
1517 | ||
1518 | /* we are being forcibly unloaded, and may not refuse. */ | |
1519 | ||
1520 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1521 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
1522 | stk = &sa->cmd_stack; | |
1523 | ||
1524 | /* if we weren't ever actually registered, don't unregister */ | |
1525 | if (sa->registered) { | |
1526 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1527 | scsi_remove_host(sa->scsi_host); | |
1528 | scsi_host_put(sa->scsi_host); | |
1529 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1530 | } | |
1531 | ||
1532 | /* set scsi_host to NULL so our detect routine will | |
1533 | find us on register */ | |
1534 | sa->scsi_host = NULL; | |
6195057f | 1535 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
1da177e4 LT |
1536 | scsi_cmd_stack_free(ctlr); |
1537 | kfree(sa); | |
1da177e4 LT |
1538 | } |
1539 | ||
1da177e4 LT |
1540 | static int |
1541 | cciss_engage_scsi(int ctlr) | |
1542 | { | |
1543 | struct cciss_scsi_adapter_data_t *sa; | |
1544 | struct cciss_scsi_cmd_stack_t *stk; | |
1545 | unsigned long flags; | |
1546 | ||
1547 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1548 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
1549 | stk = &sa->cmd_stack; | |
1550 | ||
f4a93bcd | 1551 | if (sa->registered) { |
1da177e4 LT |
1552 | printk("cciss%d: SCSI subsystem already engaged.\n", ctlr); |
1553 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
8721c81f | 1554 | return -ENXIO; |
1da177e4 | 1555 | } |
f4a93bcd | 1556 | sa->registered = 1; |
1da177e4 LT |
1557 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
1558 | cciss_update_non_disk_devices(ctlr, -1); | |
f4a93bcd | 1559 | cciss_scsi_detect(ctlr); |
1da177e4 LT |
1560 | return 0; |
1561 | } | |
1562 | ||
1563 | static void | |
89b6e743 | 1564 | cciss_seq_tape_report(struct seq_file *seq, int ctlr) |
1da177e4 LT |
1565 | { |
1566 | unsigned long flags; | |
1da177e4 LT |
1567 | |
1568 | CPQ_TAPE_LOCK(ctlr, flags); | |
89b6e743 | 1569 | seq_printf(seq, |
b9f0bd08 | 1570 | "Sequential access devices: %d\n\n", |
1da177e4 LT |
1571 | ccissscsi[ctlr].ndevices); |
1572 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1da177e4 LT |
1573 | } |
1574 | ||
88f627ae SC |
1575 | static int wait_for_device_to_become_ready(ctlr_info_t *h, |
1576 | unsigned char lunaddr[]) | |
1577 | { | |
1578 | int rc; | |
1579 | int count = 0; | |
1580 | int waittime = HZ; | |
1581 | CommandList_struct *c; | |
1582 | ||
1583 | c = cmd_alloc(h, 1); | |
1584 | if (!c) { | |
1585 | printk(KERN_WARNING "cciss%d: out of memory in " | |
1586 | "wait_for_device_to_become_ready.\n", h->ctlr); | |
1587 | return IO_ERROR; | |
1588 | } | |
1589 | ||
1590 | /* Send test unit ready until device ready, or give up. */ | |
1591 | while (count < 20) { | |
1592 | ||
1593 | /* Wait for a bit. do this first, because if we send | |
1594 | * the TUR right away, the reset will just abort it. | |
1595 | */ | |
40df6ae4 | 1596 | schedule_timeout_uninterruptible(waittime); |
88f627ae SC |
1597 | count++; |
1598 | ||
1599 | /* Increase wait time with each try, up to a point. */ | |
1600 | if (waittime < (HZ * 30)) | |
1601 | waittime = waittime * 2; | |
1602 | ||
1603 | /* Send the Test Unit Ready */ | |
b57695fe | 1604 | rc = fill_cmd(c, TEST_UNIT_READY, h->ctlr, NULL, 0, 0, |
88f627ae | 1605 | lunaddr, TYPE_CMD); |
85cc61ae | 1606 | if (rc == 0) |
1607 | rc = sendcmd_withirq_core(h, c, 0); | |
1608 | ||
1609 | (void) process_sendcmd_error(h, c); | |
88f627ae | 1610 | |
3969251b | 1611 | if (rc != 0) |
1612 | goto retry_tur; | |
88f627ae | 1613 | |
3969251b | 1614 | if (c->err_info->CommandStatus == CMD_SUCCESS) |
88f627ae SC |
1615 | break; |
1616 | ||
3969251b | 1617 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && |
1618 | c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { | |
1619 | if (c->err_info->SenseInfo[2] == NO_SENSE) | |
1620 | break; | |
1621 | if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { | |
1622 | unsigned char asc; | |
1623 | asc = c->err_info->SenseInfo[12]; | |
1624 | check_for_unit_attention(h, c); | |
1625 | if (asc == POWER_OR_RESET) | |
1626 | break; | |
1627 | } | |
1628 | } | |
1629 | retry_tur: | |
88f627ae SC |
1630 | printk(KERN_WARNING "cciss%d: Waiting %d secs " |
1631 | "for device to become ready.\n", | |
1632 | h->ctlr, waittime / HZ); | |
1633 | rc = 1; /* device not ready. */ | |
1634 | } | |
1635 | ||
1636 | if (rc) | |
1637 | printk("cciss%d: giving up on device.\n", h->ctlr); | |
1638 | else | |
1639 | printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr); | |
1640 | ||
1641 | cmd_free(h, c, 1); | |
1642 | return rc; | |
1643 | } | |
89b6e743 | 1644 | |
3da8b713 | 1645 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
1646 | * complaining. Doing a host- or bus-reset can't do anything good here. | |
1647 | * Despite what it might say in scsi_error.c, there may well be commands | |
1648 | * on the controller, as the cciss driver registers twice, once as a block | |
1649 | * device for the logical drives, and once as a scsi device, for any tape | |
1650 | * drives. So we know there are no commands out on the tape drives, but we | |
1651 | * don't know there are no commands on the controller, and it is likely | |
1652 | * that there probably are, as the cciss block device is most commonly used | |
1653 | * as a boot device (embedded controller on HP/Compaq systems.) | |
1654 | */ | |
1655 | ||
1656 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) | |
1657 | { | |
1658 | int rc; | |
1659 | CommandList_struct *cmd_in_trouble; | |
88f627ae | 1660 | unsigned char lunaddr[8]; |
3da8b713 | 1661 | ctlr_info_t **c; |
1662 | int ctlr; | |
1663 | ||
1664 | /* find the controller to which the command to be aborted was sent */ | |
1665 | c = (ctlr_info_t **) &scsicmd->device->host->hostdata[0]; | |
1666 | if (c == NULL) /* paranoia */ | |
1667 | return FAILED; | |
1668 | ctlr = (*c)->ctlr; | |
1669 | printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr); | |
3da8b713 | 1670 | /* find the command that's giving us trouble */ |
1671 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; | |
88f627ae | 1672 | if (cmd_in_trouble == NULL) /* paranoia */ |
3da8b713 | 1673 | return FAILED; |
88f627ae | 1674 | memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); |
3da8b713 | 1675 | /* send a reset to the SCSI LUN which the command was sent to */ |
85cc61ae | 1676 | rc = sendcmd_withirq(CCISS_RESET_MSG, ctlr, NULL, 0, 0, lunaddr, |
3da8b713 | 1677 | TYPE_MSG); |
88f627ae | 1678 | if (rc == 0 && wait_for_device_to_become_ready(*c, lunaddr) == 0) |
3da8b713 | 1679 | return SUCCESS; |
1680 | printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr); | |
1681 | return FAILED; | |
1682 | } | |
1683 | ||
1684 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) | |
1685 | { | |
1686 | int rc; | |
1687 | CommandList_struct *cmd_to_abort; | |
85cc61ae | 1688 | unsigned char lunaddr[8]; |
3da8b713 | 1689 | ctlr_info_t **c; |
1690 | int ctlr; | |
1691 | ||
1692 | /* find the controller to which the command to be aborted was sent */ | |
1693 | c = (ctlr_info_t **) &scsicmd->device->host->hostdata[0]; | |
1694 | if (c == NULL) /* paranoia */ | |
1695 | return FAILED; | |
1696 | ctlr = (*c)->ctlr; | |
1697 | printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", ctlr); | |
1698 | ||
1699 | /* find the command to be aborted */ | |
1700 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; | |
1701 | if (cmd_to_abort == NULL) /* paranoia */ | |
1702 | return FAILED; | |
85cc61ae | 1703 | memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); |
1704 | rc = sendcmd_withirq(CCISS_ABORT_MSG, ctlr, &cmd_to_abort->Header.Tag, | |
1705 | 0, 0, lunaddr, TYPE_MSG); | |
3da8b713 | 1706 | if (rc == 0) |
1707 | return SUCCESS; | |
1708 | return FAILED; | |
1709 | ||
1710 | } | |
1711 | ||
1da177e4 LT |
1712 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
1713 | ||
1714 | /* If no tape support, then these become defined out of existence */ | |
1715 | ||
1716 | #define cciss_scsi_setup(cntl_num) | |
1da177e4 LT |
1717 | |
1718 | #endif /* CONFIG_CISS_SCSI_TAPE */ |