Commit | Line | Data |
---|---|---|
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, | |
1da177e4 LT |
87 | .cmd_per_lun = 1, |
88 | .use_clustering = DISABLE_CLUSTERING, | |
3da8b713 | 89 | /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ |
90 | .eh_device_reset_handler= cciss_eh_device_reset_handler, | |
91 | .eh_abort_handler = cciss_eh_abort_handler, | |
1da177e4 LT |
92 | }; |
93 | ||
94 | #pragma pack(1) | |
1b7d0d28 | 95 | |
5e216153 MM |
96 | #define SCSI_PAD_32 8 |
97 | #define SCSI_PAD_64 8 | |
1b7d0d28 | 98 | |
1da177e4 LT |
99 | struct cciss_scsi_cmd_stack_elem_t { |
100 | CommandList_struct cmd; | |
101 | ErrorInfo_struct Err; | |
102 | __u32 busaddr; | |
87c3a922 | 103 | int cmdindex; |
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; | |
87c3a922 | 125 | SGDescriptor_struct **cmd_sg_list; |
1da177e4 LT |
126 | int registered; |
127 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
128 | }; | |
129 | ||
130 | #define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \ | |
aad9fb6f | 131 | &hba[ctlr]->scsi_ctlr->lock, flags); |
1da177e4 | 132 | #define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \ |
aad9fb6f | 133 | &hba[ctlr]->scsi_ctlr->lock, flags); |
1da177e4 LT |
134 | |
135 | static CommandList_struct * | |
136 | scsi_cmd_alloc(ctlr_info_t *h) | |
137 | { | |
138 | /* assume only one process in here at a time, locking done by caller. */ | |
139 | /* use CCISS_LOCK(ctlr) */ | |
140 | /* might be better to rewrite how we allocate scsi commands in a way that */ | |
141 | /* needs no locking at all. */ | |
142 | ||
143 | /* take the top memory chunk off the stack and return it, if any. */ | |
144 | struct cciss_scsi_cmd_stack_elem_t *c; | |
145 | struct cciss_scsi_adapter_data_t *sa; | |
146 | struct cciss_scsi_cmd_stack_t *stk; | |
147 | u64bit temp64; | |
148 | ||
aad9fb6f | 149 | sa = h->scsi_ctlr; |
1da177e4 LT |
150 | stk = &sa->cmd_stack; |
151 | ||
152 | if (stk->top < 0) | |
153 | return NULL; | |
154 | c = stk->elem[stk->top]; | |
155 | /* memset(c, 0, sizeof(*c)); */ | |
156 | memset(&c->cmd, 0, sizeof(c->cmd)); | |
157 | memset(&c->Err, 0, sizeof(c->Err)); | |
158 | /* set physical addr of cmd and addr of scsi parameters */ | |
159 | c->cmd.busaddr = c->busaddr; | |
87c3a922 | 160 | c->cmd.cmdindex = c->cmdindex; |
1da177e4 LT |
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 | ||
aad9fb6f | 189 | sa = h->scsi_ctlr; |
1da177e4 | 190 | stk = &sa->cmd_stack; |
713b6864 | 191 | stk->top++; |
1da177e4 LT |
192 | if (stk->top >= CMD_STACK_SIZE) { |
193 | printk("cciss: scsi_cmd_free called too many times.\n"); | |
194 | BUG(); | |
195 | } | |
1da177e4 LT |
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 | ||
87c3a922 SC |
206 | sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[ctlr], |
207 | hba[ctlr]->chainsize, CMD_STACK_SIZE); | |
208 | if (!sa->cmd_sg_list && hba[ctlr]->chainsize > 0) | |
209 | return -ENOMEM; | |
210 | ||
1da177e4 LT |
211 | stk = &sa->cmd_stack; |
212 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
213 | ||
1b7d0d28 SC |
214 | /* Check alignment, see cciss_cmd.h near CommandList_struct def. */ |
215 | BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0); | |
5e216153 MM |
216 | /* printk(KERN_WARNING "cciss_scsi.c: 0x%08x 0x%08x 0x%08x\n", |
217 | 0xdeadbeef, sizeof(*stk->pool), 0xbeefdead); */ | |
1b7d0d28 | 218 | /* pci_alloc_consistent guarantees 32-bit DMA address will be used */ |
1da177e4 LT |
219 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) |
220 | pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle); | |
221 | ||
222 | if (stk->pool == NULL) { | |
87c3a922 SC |
223 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE); |
224 | sa->cmd_sg_list = NULL; | |
225 | return -ENOMEM; | |
1da177e4 LT |
226 | } |
227 | ||
228 | for (i=0; i<CMD_STACK_SIZE; i++) { | |
229 | stk->elem[i] = &stk->pool[i]; | |
230 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
231 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
87c3a922 | 232 | stk->elem[i]->cmdindex = i; |
1da177e4 LT |
233 | } |
234 | stk->top = CMD_STACK_SIZE-1; | |
235 | return 0; | |
236 | } | |
237 | ||
238 | static void | |
239 | scsi_cmd_stack_free(int ctlr) | |
240 | { | |
241 | struct cciss_scsi_adapter_data_t *sa; | |
242 | struct cciss_scsi_cmd_stack_t *stk; | |
243 | size_t size; | |
244 | ||
aad9fb6f | 245 | sa = hba[ctlr]->scsi_ctlr; |
1da177e4 LT |
246 | stk = &sa->cmd_stack; |
247 | if (stk->top != CMD_STACK_SIZE-1) { | |
248 | printk( "cciss: %d scsi commands are still outstanding.\n", | |
249 | CMD_STACK_SIZE - stk->top); | |
250 | // BUG(); | |
251 | printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk); | |
252 | } | |
253 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
254 | ||
255 | pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle); | |
256 | stk->pool = NULL; | |
87c3a922 | 257 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE); |
1da177e4 LT |
258 | } |
259 | ||
400bb236 | 260 | #if 0 |
1da177e4 LT |
261 | static int xmargin=8; |
262 | static int amargin=60; | |
263 | ||
264 | static void | |
265 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
266 | { | |
267 | ||
268 | int i; | |
269 | unsigned char *x; | |
270 | ||
271 | if (hex) | |
272 | { | |
273 | x = c; | |
274 | for (i=0;i<len;i++) | |
275 | { | |
276 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
277 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
278 | printk(" %02x", *x); | |
279 | x++; | |
280 | } | |
281 | printk("\n"); | |
282 | } | |
283 | if (ascii) | |
284 | { | |
285 | x = c; | |
286 | for (i=0;i<len;i++) | |
287 | { | |
288 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
289 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
290 | if (*x > 26 && *x < 128) printk("%c", *x); | |
291 | else printk("."); | |
292 | x++; | |
293 | } | |
294 | printk("\n"); | |
295 | } | |
296 | } | |
297 | ||
298 | static void | |
299 | print_cmd(CommandList_struct *cp) | |
300 | { | |
301 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
302 | printk("sglist:%d\n", cp->Header.SGList); | |
303 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
304 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
305 | cp->Header.Tag.lower); | |
306 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
307 | cp->Header.LUN.LunAddrBytes[0], | |
308 | cp->Header.LUN.LunAddrBytes[1], | |
309 | cp->Header.LUN.LunAddrBytes[2], | |
310 | cp->Header.LUN.LunAddrBytes[3], | |
311 | cp->Header.LUN.LunAddrBytes[4], | |
312 | cp->Header.LUN.LunAddrBytes[5], | |
313 | cp->Header.LUN.LunAddrBytes[6], | |
314 | cp->Header.LUN.LunAddrBytes[7]); | |
315 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
316 | printk("Type:%d\n",cp->Request.Type.Type); | |
317 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
318 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
319 | printk("Timeout:%d\n",cp->Request.Timeout); | |
320 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
321 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
322 | cp->Request.CDB[0], cp->Request.CDB[1], | |
323 | cp->Request.CDB[2], cp->Request.CDB[3], | |
324 | cp->Request.CDB[4], cp->Request.CDB[5], | |
325 | cp->Request.CDB[6], cp->Request.CDB[7], | |
326 | cp->Request.CDB[8], cp->Request.CDB[9], | |
327 | cp->Request.CDB[10], cp->Request.CDB[11], | |
328 | cp->Request.CDB[12], cp->Request.CDB[13], | |
329 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
330 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
331 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
332 | cp->ErrDesc.Len); | |
333 | printk("sgs..........Errorinfo:\n"); | |
334 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
335 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
336 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
337 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
338 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
339 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
340 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
341 | ||
342 | } | |
343 | ||
344 | #endif | |
345 | ||
346 | static int | |
347 | find_bus_target_lun(int ctlr, int *bus, int *target, int *lun) | |
348 | { | |
349 | /* finds an unused bus, target, lun for a new device */ | |
350 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
351 | int i, found=0; | |
352 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
353 | ||
354 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
355 | ||
356 | target_taken[SELF_SCSI_ID] = 1; | |
357 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) | |
358 | target_taken[ccissscsi[ctlr].dev[i].target] = 1; | |
359 | ||
360 | for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) { | |
361 | if (!target_taken[i]) { | |
362 | *bus = 0; *target=i; *lun = 0; found=1; | |
363 | break; | |
364 | } | |
365 | } | |
366 | return (!found); | |
367 | } | |
f4a93bcd MM |
368 | struct scsi2map { |
369 | char scsi3addr[8]; | |
370 | int bus, target, lun; | |
371 | }; | |
1da177e4 LT |
372 | |
373 | static int | |
374 | cciss_scsi_add_entry(int ctlr, int hostno, | |
905bd78f | 375 | struct cciss_scsi_dev_t *device, |
f4a93bcd | 376 | struct scsi2map *added, int *nadded) |
1da177e4 LT |
377 | { |
378 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
379 | int n = ccissscsi[ctlr].ndevices; | |
380 | struct cciss_scsi_dev_t *sd; | |
935dc8d7 MM |
381 | int i, bus, target, lun; |
382 | unsigned char addr1[8], addr2[8]; | |
1da177e4 LT |
383 | |
384 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
385 | printk("cciss%d: Too many devices, " | |
386 | "some will be inaccessible.\n", ctlr); | |
387 | return -1; | |
388 | } | |
f4a93bcd | 389 | |
935dc8d7 MM |
390 | bus = target = -1; |
391 | lun = 0; | |
392 | /* Is this device a non-zero lun of a multi-lun device */ | |
393 | /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ | |
905bd78f | 394 | if (device->scsi3addr[4] != 0) { |
935dc8d7 MM |
395 | /* Search through our list and find the device which */ |
396 | /* has the same 8 byte LUN address, excepting byte 4. */ | |
397 | /* Assign the same bus and target for this new LUN. */ | |
398 | /* Use the logical unit number from the firmware. */ | |
905bd78f | 399 | memcpy(addr1, device->scsi3addr, 8); |
935dc8d7 MM |
400 | addr1[4] = 0; |
401 | for (i = 0; i < n; i++) { | |
402 | sd = &ccissscsi[ctlr].dev[i]; | |
403 | memcpy(addr2, sd->scsi3addr, 8); | |
404 | addr2[4] = 0; | |
405 | /* differ only in byte 4? */ | |
406 | if (memcmp(addr1, addr2, 8) == 0) { | |
407 | bus = sd->bus; | |
408 | target = sd->target; | |
905bd78f | 409 | lun = device->scsi3addr[4]; |
935dc8d7 MM |
410 | break; |
411 | } | |
412 | } | |
413 | } | |
414 | ||
415 | sd = &ccissscsi[ctlr].dev[n]; | |
416 | if (lun == 0) { | |
417 | if (find_bus_target_lun(ctlr, | |
418 | &sd->bus, &sd->target, &sd->lun) != 0) | |
419 | return -1; | |
420 | } else { | |
421 | sd->bus = bus; | |
422 | sd->target = target; | |
423 | sd->lun = lun; | |
424 | } | |
f4a93bcd MM |
425 | added[*nadded].bus = sd->bus; |
426 | added[*nadded].target = sd->target; | |
427 | added[*nadded].lun = sd->lun; | |
428 | (*nadded)++; | |
429 | ||
905bd78f | 430 | memcpy(sd->scsi3addr, device->scsi3addr, 8); |
431 | memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); | |
432 | memcpy(sd->revision, device->revision, sizeof(sd->revision)); | |
433 | memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); | |
434 | sd->devtype = device->devtype; | |
435 | ||
1da177e4 LT |
436 | ccissscsi[ctlr].ndevices++; |
437 | ||
438 | /* initially, (before registering with scsi layer) we don't | |
439 | know our hostno and we don't want to print anything first | |
440 | time anyway (the scsi layer's inquiries will show that info) */ | |
441 | if (hostno != -1) | |
442 | printk("cciss%d: %s device c%db%dt%dl%d added.\n", | |
4ff36718 | 443 | ctlr, scsi_device_type(sd->devtype), hostno, |
1da177e4 LT |
444 | sd->bus, sd->target, sd->lun); |
445 | return 0; | |
446 | } | |
447 | ||
448 | static void | |
f4a93bcd MM |
449 | cciss_scsi_remove_entry(int ctlr, int hostno, int entry, |
450 | struct scsi2map *removed, int *nremoved) | |
1da177e4 LT |
451 | { |
452 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
453 | int i; | |
454 | struct cciss_scsi_dev_t sd; | |
455 | ||
456 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
457 | sd = ccissscsi[ctlr].dev[entry]; | |
f4a93bcd MM |
458 | removed[*nremoved].bus = sd.bus; |
459 | removed[*nremoved].target = sd.target; | |
460 | removed[*nremoved].lun = sd.lun; | |
461 | (*nremoved)++; | |
1da177e4 LT |
462 | for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++) |
463 | ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1]; | |
464 | ccissscsi[ctlr].ndevices--; | |
465 | printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
4ff36718 | 466 | ctlr, scsi_device_type(sd.devtype), hostno, |
1da177e4 LT |
467 | sd.bus, sd.target, sd.lun); |
468 | } | |
469 | ||
470 | ||
471 | #define SCSI3ADDR_EQ(a,b) ( \ | |
472 | (a)[7] == (b)[7] && \ | |
473 | (a)[6] == (b)[6] && \ | |
474 | (a)[5] == (b)[5] && \ | |
475 | (a)[4] == (b)[4] && \ | |
476 | (a)[3] == (b)[3] && \ | |
477 | (a)[2] == (b)[2] && \ | |
478 | (a)[1] == (b)[1] && \ | |
479 | (a)[0] == (b)[0]) | |
480 | ||
f4a93bcd MM |
481 | static void fixup_botched_add(int ctlr, char *scsi3addr) |
482 | { | |
483 | /* called when scsi_add_device fails in order to re-adjust */ | |
484 | /* ccissscsi[] to match the mid layer's view. */ | |
485 | unsigned long flags; | |
486 | int i, j; | |
487 | CPQ_TAPE_LOCK(ctlr, flags); | |
488 | for (i = 0; i < ccissscsi[ctlr].ndevices; i++) { | |
489 | if (memcmp(scsi3addr, | |
490 | ccissscsi[ctlr].dev[i].scsi3addr, 8) == 0) { | |
491 | for (j = i; j < ccissscsi[ctlr].ndevices-1; j++) | |
492 | ccissscsi[ctlr].dev[j] = | |
493 | ccissscsi[ctlr].dev[j+1]; | |
494 | ccissscsi[ctlr].ndevices--; | |
495 | break; | |
496 | } | |
497 | } | |
498 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
499 | } | |
500 | ||
905bd78f | 501 | static int device_is_the_same(struct cciss_scsi_dev_t *dev1, |
502 | struct cciss_scsi_dev_t *dev2) | |
503 | { | |
504 | return dev1->devtype == dev2->devtype && | |
505 | memcmp(dev1->scsi3addr, dev2->scsi3addr, | |
506 | sizeof(dev1->scsi3addr)) == 0 && | |
507 | memcmp(dev1->device_id, dev2->device_id, | |
508 | sizeof(dev1->device_id)) == 0 && | |
509 | memcmp(dev1->vendor, dev2->vendor, | |
510 | sizeof(dev1->vendor)) == 0 && | |
511 | memcmp(dev1->model, dev2->model, | |
512 | sizeof(dev1->model)) == 0 && | |
513 | memcmp(dev1->revision, dev2->revision, | |
514 | sizeof(dev1->revision)) == 0; | |
515 | } | |
516 | ||
1da177e4 LT |
517 | static int |
518 | adjust_cciss_scsi_table(int ctlr, int hostno, | |
519 | struct cciss_scsi_dev_t sd[], int nsds) | |
520 | { | |
521 | /* sd contains scsi3 addresses and devtypes, but | |
522 | bus target and lun are not filled in. This funciton | |
523 | takes what's in sd to be the current and adjusts | |
524 | ccissscsi[] to be in line with what's in sd. */ | |
525 | ||
526 | int i,j, found, changes=0; | |
527 | struct cciss_scsi_dev_t *csd; | |
528 | unsigned long flags; | |
f4a93bcd MM |
529 | struct scsi2map *added, *removed; |
530 | int nadded, nremoved; | |
531 | struct Scsi_Host *sh = NULL; | |
532 | ||
533 | added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
534 | GFP_KERNEL); | |
535 | removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
536 | GFP_KERNEL); | |
537 | ||
538 | if (!added || !removed) { | |
539 | printk(KERN_WARNING "cciss%d: Out of memory in " | |
540 | "adjust_cciss_scsi_table\n", ctlr); | |
541 | goto free_and_out; | |
542 | } | |
1da177e4 LT |
543 | |
544 | CPQ_TAPE_LOCK(ctlr, flags); | |
545 | ||
f4a93bcd | 546 | if (hostno != -1) /* if it's not the first time... */ |
aad9fb6f | 547 | sh = hba[ctlr]->scsi_ctlr->scsi_host; |
f4a93bcd | 548 | |
1da177e4 LT |
549 | /* find any devices in ccissscsi[] that are not in |
550 | sd[] and remove them from ccissscsi[] */ | |
551 | ||
552 | i = 0; | |
f4a93bcd MM |
553 | nremoved = 0; |
554 | nadded = 0; | |
1da177e4 LT |
555 | while(i<ccissscsi[ctlr].ndevices) { |
556 | csd = &ccissscsi[ctlr].dev[i]; | |
557 | found=0; | |
558 | for (j=0;j<nsds;j++) { | |
559 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
560 | csd->scsi3addr)) { | |
905bd78f | 561 | if (device_is_the_same(&sd[j], csd)) |
1da177e4 LT |
562 | found=2; |
563 | else | |
564 | found=1; | |
565 | break; | |
566 | } | |
567 | } | |
568 | ||
569 | if (found == 0) { /* device no longer present. */ | |
570 | changes++; | |
571 | /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
4ff36718 | 572 | ctlr, scsi_device_type(csd->devtype), hostno, |
1da177e4 | 573 | csd->bus, csd->target, csd->lun); */ |
f4a93bcd MM |
574 | cciss_scsi_remove_entry(ctlr, hostno, i, |
575 | removed, &nremoved); | |
576 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 577 | } else if (found == 1) { /* device is different in some way */ |
1da177e4 | 578 | changes++; |
905bd78f | 579 | printk("cciss%d: device c%db%dt%dl%d has changed.\n", |
580 | ctlr, hostno, csd->bus, csd->target, csd->lun); | |
f4a93bcd MM |
581 | cciss_scsi_remove_entry(ctlr, hostno, i, |
582 | removed, &nremoved); | |
583 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 584 | if (cciss_scsi_add_entry(ctlr, hostno, &sd[j], |
f4a93bcd MM |
585 | added, &nadded) != 0) |
586 | /* we just removed one, so add can't fail. */ | |
587 | BUG(); | |
1da177e4 | 588 | csd->devtype = sd[j].devtype; |
905bd78f | 589 | memcpy(csd->device_id, sd[j].device_id, |
590 | sizeof(csd->device_id)); | |
591 | memcpy(csd->vendor, sd[j].vendor, | |
592 | sizeof(csd->vendor)); | |
593 | memcpy(csd->model, sd[j].model, | |
594 | sizeof(csd->model)); | |
595 | memcpy(csd->revision, sd[j].revision, | |
596 | sizeof(csd->revision)); | |
1da177e4 LT |
597 | } else /* device is same as it ever was, */ |
598 | i++; /* so just move along. */ | |
599 | } | |
600 | ||
601 | /* Now, make sure every device listed in sd[] is also | |
602 | listed in ccissscsi[], adding them if they aren't found */ | |
603 | ||
604 | for (i=0;i<nsds;i++) { | |
605 | found=0; | |
606 | for (j=0;j<ccissscsi[ctlr].ndevices;j++) { | |
607 | csd = &ccissscsi[ctlr].dev[j]; | |
608 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, | |
609 | csd->scsi3addr)) { | |
905bd78f | 610 | if (device_is_the_same(&sd[i], csd)) |
1da177e4 LT |
611 | found=2; /* found device */ |
612 | else | |
613 | found=1; /* found a bug. */ | |
614 | break; | |
615 | } | |
616 | } | |
617 | if (!found) { | |
618 | changes++; | |
905bd78f | 619 | if (cciss_scsi_add_entry(ctlr, hostno, &sd[i], |
f4a93bcd | 620 | added, &nadded) != 0) |
1da177e4 LT |
621 | break; |
622 | } else if (found == 1) { | |
623 | /* should never happen... */ | |
624 | changes++; | |
905bd78f | 625 | printk(KERN_WARNING "cciss%d: device " |
626 | "unexpectedly changed\n", ctlr); | |
1da177e4 LT |
627 | /* but if it does happen, we just ignore that device */ |
628 | } | |
629 | } | |
630 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
631 | ||
f4a93bcd MM |
632 | /* Don't notify scsi mid layer of any changes the first time through */ |
633 | /* (or if there are no changes) scsi_scan_host will do it later the */ | |
634 | /* first time through. */ | |
635 | if (hostno == -1 || !changes) | |
636 | goto free_and_out; | |
637 | ||
638 | /* Notify scsi mid layer of any removed devices */ | |
639 | for (i = 0; i < nremoved; i++) { | |
640 | struct scsi_device *sdev = | |
641 | scsi_device_lookup(sh, removed[i].bus, | |
642 | removed[i].target, removed[i].lun); | |
643 | if (sdev != NULL) { | |
644 | scsi_remove_device(sdev); | |
645 | scsi_device_put(sdev); | |
646 | } else { | |
647 | /* We don't expect to get here. */ | |
648 | /* future cmds to this device will get selection */ | |
649 | /* timeout as if the device was gone. */ | |
650 | printk(KERN_WARNING "cciss%d: didn't find " | |
651 | "c%db%dt%dl%d\n for removal.", | |
652 | ctlr, hostno, removed[i].bus, | |
653 | removed[i].target, removed[i].lun); | |
654 | } | |
655 | } | |
656 | ||
657 | /* Notify scsi mid layer of any added devices */ | |
658 | for (i = 0; i < nadded; i++) { | |
659 | int rc; | |
660 | rc = scsi_add_device(sh, added[i].bus, | |
661 | added[i].target, added[i].lun); | |
662 | if (rc == 0) | |
663 | continue; | |
664 | printk(KERN_WARNING "cciss%d: scsi_add_device " | |
665 | "c%db%dt%dl%d failed, device not added.\n", | |
666 | ctlr, hostno, | |
667 | added[i].bus, added[i].target, added[i].lun); | |
668 | /* now we have to remove it from ccissscsi, */ | |
669 | /* since it didn't get added to scsi mid layer */ | |
670 | fixup_botched_add(ctlr, added[i].scsi3addr); | |
671 | } | |
1da177e4 | 672 | |
f4a93bcd MM |
673 | free_and_out: |
674 | kfree(added); | |
675 | kfree(removed); | |
1da177e4 LT |
676 | return 0; |
677 | } | |
678 | ||
679 | static int | |
680 | lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr) | |
681 | { | |
682 | int i; | |
683 | struct cciss_scsi_dev_t *sd; | |
684 | unsigned long flags; | |
685 | ||
686 | CPQ_TAPE_LOCK(ctlr, flags); | |
687 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) { | |
688 | sd = &ccissscsi[ctlr].dev[i]; | |
689 | if (sd->bus == bus && | |
690 | sd->target == target && | |
691 | sd->lun == lun) { | |
692 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
693 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
694 | return 0; | |
695 | } | |
696 | } | |
697 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
698 | return -1; | |
699 | } | |
700 | ||
701 | static void | |
702 | cciss_scsi_setup(int cntl_num) | |
703 | { | |
704 | struct cciss_scsi_adapter_data_t * shba; | |
705 | ||
706 | ccissscsi[cntl_num].ndevices = 0; | |
707 | shba = (struct cciss_scsi_adapter_data_t *) | |
708 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
709 | if (shba == NULL) | |
710 | return; | |
711 | shba->scsi_host = NULL; | |
712 | spin_lock_init(&shba->lock); | |
713 | shba->registered = 0; | |
714 | if (scsi_cmd_stack_setup(cntl_num, shba) != 0) { | |
715 | kfree(shba); | |
716 | shba = NULL; | |
717 | } | |
aad9fb6f | 718 | hba[cntl_num]->scsi_ctlr = shba; |
1da177e4 LT |
719 | return; |
720 | } | |
721 | ||
722 | static void | |
723 | complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag) | |
724 | { | |
725 | struct scsi_cmnd *cmd; | |
726 | ctlr_info_t *ctlr; | |
1da177e4 LT |
727 | ErrorInfo_struct *ei; |
728 | ||
729 | ei = cp->err_info; | |
730 | ||
731 | /* First, see if it was a message rather than a command */ | |
732 | if (cp->Request.Type.Type == TYPE_MSG) { | |
733 | cp->cmd_type = CMD_MSG_DONE; | |
734 | return; | |
735 | } | |
736 | ||
737 | cmd = (struct scsi_cmnd *) cp->scsi_cmd; | |
738 | ctlr = hba[cp->ctlr]; | |
739 | ||
41ce639a | 740 | scsi_dma_unmap(cmd); |
87c3a922 SC |
741 | if (cp->Header.SGTotal > ctlr->max_cmd_sgentries) |
742 | cciss_unmap_sg_chain_block(ctlr, cp); | |
1da177e4 LT |
743 | |
744 | cmd->result = (DID_OK << 16); /* host byte */ | |
745 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
746 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
747 | ||
748 | cmd->result |= (ei->ScsiStatus); | |
749 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
750 | ||
751 | /* copy the sense data whether we need to or not. */ | |
752 | ||
753 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
754 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
755 | SCSI_SENSE_BUFFERSIZE : | |
756 | ei->SenseLen); | |
41ce639a | 757 | scsi_set_resid(cmd, ei->ResidualCnt); |
1da177e4 LT |
758 | |
759 | if(ei->CommandStatus != 0) | |
760 | { /* an error has occurred */ | |
761 | switch(ei->CommandStatus) | |
762 | { | |
763 | case CMD_TARGET_STATUS: | |
764 | /* Pass it up to the upper layers... */ | |
765 | if( ei->ScsiStatus) | |
766 | { | |
767 | #if 0 | |
768 | printk(KERN_WARNING "cciss: cmd %p " | |
769 | "has SCSI Status = %x\n", | |
770 | cp, | |
771 | ei->ScsiStatus); | |
772 | #endif | |
b0e15f6d | 773 | cmd->result |= (ei->ScsiStatus << 1); |
1da177e4 LT |
774 | } |
775 | else { /* scsi status is zero??? How??? */ | |
776 | ||
777 | /* Ordinarily, this case should never happen, but there is a bug | |
778 | in some released firmware revisions that allows it to happen | |
779 | if, for example, a 4100 backplane loses power and the tape | |
780 | drive is in it. We assume that it's a fatal error of some | |
781 | kind because we can't show that it wasn't. We will make it | |
782 | look like selection timeout since that is the most common | |
783 | reason for this to occur, and it's severe enough. */ | |
784 | ||
785 | cmd->result = DID_NO_CONNECT << 16; | |
786 | } | |
787 | break; | |
788 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
789 | break; | |
790 | case CMD_DATA_OVERRUN: | |
791 | printk(KERN_WARNING "cciss: cp %p has" | |
792 | " completed with data overrun " | |
793 | "reported\n", cp); | |
794 | break; | |
795 | case CMD_INVALID: { | |
796 | /* print_bytes(cp, sizeof(*cp), 1, 0); | |
797 | print_cmd(cp); */ | |
798 | /* We get CMD_INVALID if you address a non-existent tape drive instead | |
799 | of a selection timeout (no response). You will see this if you yank | |
800 | out a tape drive, then try to access it. This is kind of a shame | |
801 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
802 | get interpreted as a missing target. */ | |
803 | cmd->result = DID_NO_CONNECT << 16; | |
804 | } | |
805 | break; | |
806 | case CMD_PROTOCOL_ERR: | |
807 | printk(KERN_WARNING "cciss: cp %p has " | |
808 | "protocol error \n", cp); | |
809 | break; | |
810 | case CMD_HARDWARE_ERR: | |
811 | cmd->result = DID_ERROR << 16; | |
812 | printk(KERN_WARNING "cciss: cp %p had " | |
813 | " hardware error\n", cp); | |
814 | break; | |
815 | case CMD_CONNECTION_LOST: | |
816 | cmd->result = DID_ERROR << 16; | |
817 | printk(KERN_WARNING "cciss: cp %p had " | |
818 | "connection lost\n", cp); | |
819 | break; | |
820 | case CMD_ABORTED: | |
821 | cmd->result = DID_ABORT << 16; | |
822 | printk(KERN_WARNING "cciss: cp %p was " | |
823 | "aborted\n", cp); | |
824 | break; | |
825 | case CMD_ABORT_FAILED: | |
826 | cmd->result = DID_ERROR << 16; | |
827 | printk(KERN_WARNING "cciss: cp %p reports " | |
828 | "abort failed\n", cp); | |
829 | break; | |
830 | case CMD_UNSOLICITED_ABORT: | |
831 | cmd->result = DID_ABORT << 16; | |
832 | printk(KERN_WARNING "cciss: cp %p aborted " | |
833 | "do to an unsolicited abort\n", cp); | |
834 | break; | |
835 | case CMD_TIMEOUT: | |
836 | cmd->result = DID_TIME_OUT << 16; | |
837 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
838 | cp); | |
839 | break; | |
840 | default: | |
841 | cmd->result = DID_ERROR << 16; | |
842 | printk(KERN_WARNING "cciss: cp %p returned " | |
843 | "unknown status %x\n", cp, | |
844 | ei->CommandStatus); | |
845 | } | |
846 | } | |
847 | // printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel, | |
848 | // cmd->target, cmd->lun); | |
849 | cmd->scsi_done(cmd); | |
850 | scsi_cmd_free(ctlr, cp); | |
851 | } | |
852 | ||
853 | static int | |
854 | cciss_scsi_detect(int ctlr) | |
855 | { | |
856 | struct Scsi_Host *sh; | |
857 | int error; | |
858 | ||
859 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
860 | if (sh == NULL) | |
861 | goto fail; | |
862 | sh->io_port = 0; // good enough? FIXME, | |
863 | sh->n_io_port = 0; // I don't think we use these two... | |
864 | sh->this_id = SELF_SCSI_ID; | |
87c3a922 | 865 | sh->sg_tablesize = hba[ctlr]->maxsgentries; |
79600aad | 866 | sh->max_cmd_len = MAX_COMMAND_SIZE; |
1da177e4 LT |
867 | |
868 | ((struct cciss_scsi_adapter_data_t *) | |
aad9fb6f | 869 | hba[ctlr]->scsi_ctlr)->scsi_host = sh; |
1da177e4 | 870 | sh->hostdata[0] = (unsigned long) hba[ctlr]; |
fb86a35b | 871 | sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT]; |
1da177e4 LT |
872 | sh->unique_id = sh->irq; |
873 | error = scsi_add_host(sh, &hba[ctlr]->pdev->dev); | |
874 | if (error) | |
875 | goto fail_host_put; | |
876 | scsi_scan_host(sh); | |
877 | return 1; | |
878 | ||
879 | fail_host_put: | |
880 | scsi_host_put(sh); | |
881 | fail: | |
882 | return 0; | |
883 | } | |
884 | ||
885 | static void | |
886 | cciss_unmap_one(struct pci_dev *pdev, | |
887 | CommandList_struct *cp, | |
888 | size_t buflen, | |
889 | int data_direction) | |
890 | { | |
891 | u64bit addr64; | |
892 | ||
893 | addr64.val32.lower = cp->SG[0].Addr.lower; | |
894 | addr64.val32.upper = cp->SG[0].Addr.upper; | |
895 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); | |
896 | } | |
897 | ||
898 | static void | |
899 | cciss_map_one(struct pci_dev *pdev, | |
900 | CommandList_struct *cp, | |
901 | unsigned char *buf, | |
902 | size_t buflen, | |
903 | int data_direction) | |
904 | { | |
905 | __u64 addr64; | |
906 | ||
907 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
908 | cp->SG[0].Addr.lower = | |
909 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
910 | cp->SG[0].Addr.upper = | |
911 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
912 | cp->SG[0].Len = buflen; | |
913 | cp->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
914 | cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
915 | } | |
916 | ||
917 | static int | |
918 | cciss_scsi_do_simple_cmd(ctlr_info_t *c, | |
919 | CommandList_struct *cp, | |
920 | unsigned char *scsi3addr, | |
921 | unsigned char *cdb, | |
922 | unsigned char cdblen, | |
923 | unsigned char *buf, int bufsize, | |
924 | int direction) | |
925 | { | |
926 | unsigned long flags; | |
6e9a4738 | 927 | DECLARE_COMPLETION_ONSTACK(wait); |
1da177e4 LT |
928 | |
929 | cp->cmd_type = CMD_IOCTL_PEND; // treat this like an ioctl | |
930 | cp->scsi_cmd = NULL; | |
931 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
932 | memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN)); | |
933 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
934 | // Fill in the request block... | |
935 | ||
936 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
937 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
938 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
939 | ||
940 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
941 | memcpy(cp->Request.CDB, cdb, cdblen); | |
942 | cp->Request.Timeout = 0; | |
943 | cp->Request.CDBLen = cdblen; | |
944 | cp->Request.Type.Type = TYPE_CMD; | |
945 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
946 | cp->Request.Type.Direction = direction; | |
947 | ||
948 | /* Fill in the SG list and do dma mapping */ | |
949 | cciss_map_one(c->pdev, cp, (unsigned char *) buf, | |
950 | bufsize, DMA_FROM_DEVICE); | |
951 | ||
952 | cp->waiting = &wait; | |
953 | ||
954 | /* Put the request on the tail of the request queue */ | |
955 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
956 | addQ(&c->reqQ, cp); | |
957 | c->Qdepth++; | |
958 | start_io(c); | |
959 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
960 | ||
961 | wait_for_completion(&wait); | |
962 | ||
963 | /* undo the dma mapping */ | |
964 | cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE); | |
965 | return(0); | |
966 | } | |
967 | ||
968 | static void | |
969 | cciss_scsi_interpret_error(CommandList_struct *cp) | |
970 | { | |
971 | ErrorInfo_struct *ei; | |
972 | ||
973 | ei = cp->err_info; | |
974 | switch(ei->CommandStatus) | |
975 | { | |
976 | case CMD_TARGET_STATUS: | |
977 | printk(KERN_WARNING "cciss: cmd %p has " | |
978 | "completed with errors\n", cp); | |
979 | printk(KERN_WARNING "cciss: cmd %p " | |
980 | "has SCSI Status = %x\n", | |
981 | cp, | |
982 | ei->ScsiStatus); | |
983 | if (ei->ScsiStatus == 0) | |
984 | printk(KERN_WARNING | |
985 | "cciss:SCSI status is abnormally zero. " | |
986 | "(probably indicates selection timeout " | |
987 | "reported incorrectly due to a known " | |
988 | "firmware bug, circa July, 2001.)\n"); | |
989 | break; | |
990 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
991 | printk("UNDERRUN\n"); | |
992 | break; | |
993 | case CMD_DATA_OVERRUN: | |
994 | printk(KERN_WARNING "cciss: cp %p has" | |
995 | " completed with data overrun " | |
996 | "reported\n", cp); | |
997 | break; | |
998 | case CMD_INVALID: { | |
999 | /* controller unfortunately reports SCSI passthru's */ | |
1000 | /* to non-existent targets as invalid commands. */ | |
1001 | printk(KERN_WARNING "cciss: cp %p is " | |
1002 | "reported invalid (probably means " | |
1003 | "target device no longer present)\n", | |
1004 | cp); | |
1005 | /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0); | |
1006 | print_cmd(cp); */ | |
1007 | } | |
1008 | break; | |
1009 | case CMD_PROTOCOL_ERR: | |
1010 | printk(KERN_WARNING "cciss: cp %p has " | |
1011 | "protocol error \n", cp); | |
1012 | break; | |
1013 | case CMD_HARDWARE_ERR: | |
1014 | /* cmd->result = DID_ERROR << 16; */ | |
1015 | printk(KERN_WARNING "cciss: cp %p had " | |
1016 | " hardware error\n", cp); | |
1017 | break; | |
1018 | case CMD_CONNECTION_LOST: | |
1019 | printk(KERN_WARNING "cciss: cp %p had " | |
1020 | "connection lost\n", cp); | |
1021 | break; | |
1022 | case CMD_ABORTED: | |
1023 | printk(KERN_WARNING "cciss: cp %p was " | |
1024 | "aborted\n", cp); | |
1025 | break; | |
1026 | case CMD_ABORT_FAILED: | |
1027 | printk(KERN_WARNING "cciss: cp %p reports " | |
1028 | "abort failed\n", cp); | |
1029 | break; | |
1030 | case CMD_UNSOLICITED_ABORT: | |
1031 | printk(KERN_WARNING "cciss: cp %p aborted " | |
1032 | "do to an unsolicited abort\n", cp); | |
1033 | break; | |
1034 | case CMD_TIMEOUT: | |
1035 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
1036 | cp); | |
1037 | break; | |
1038 | default: | |
1039 | printk(KERN_WARNING "cciss: cp %p returned " | |
1040 | "unknown status %x\n", cp, | |
1041 | ei->CommandStatus); | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | static int | |
1046 | cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr, | |
905bd78f | 1047 | unsigned char page, unsigned char *buf, |
1048 | unsigned char bufsize) | |
1da177e4 LT |
1049 | { |
1050 | int rc; | |
1051 | CommandList_struct *cp; | |
1052 | char cdb[6]; | |
1053 | ErrorInfo_struct *ei; | |
1054 | unsigned long flags; | |
1055 | ||
1056 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1057 | cp = scsi_cmd_alloc(c); | |
1058 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1059 | ||
1060 | if (cp == NULL) { /* trouble... */ | |
1061 | printk("cmd_alloc returned NULL!\n"); | |
1062 | return -1; | |
1063 | } | |
1064 | ||
1065 | ei = cp->err_info; | |
1066 | ||
1067 | cdb[0] = CISS_INQUIRY; | |
905bd78f | 1068 | cdb[1] = (page != 0); |
1069 | cdb[2] = page; | |
1da177e4 | 1070 | cdb[3] = 0; |
47922d06 | 1071 | cdb[4] = bufsize; |
1da177e4 LT |
1072 | cdb[5] = 0; |
1073 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb, | |
47922d06 | 1074 | 6, buf, bufsize, XFER_READ); |
1da177e4 LT |
1075 | |
1076 | if (rc != 0) return rc; /* something went wrong */ | |
1077 | ||
1078 | if (ei->CommandStatus != 0 && | |
1079 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
1080 | cciss_scsi_interpret_error(cp); | |
1081 | rc = -1; | |
1082 | } | |
1083 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1084 | scsi_cmd_free(c, cp); | |
1085 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1086 | return rc; | |
1087 | } | |
1088 | ||
905bd78f | 1089 | /* Get the device id from inquiry page 0x83 */ |
1090 | static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr, | |
1091 | unsigned char *device_id, int buflen) | |
1092 | { | |
1093 | int rc; | |
1094 | unsigned char *buf; | |
1095 | ||
1096 | if (buflen > 16) | |
1097 | buflen = 16; | |
1098 | buf = kzalloc(64, GFP_KERNEL); | |
1099 | if (!buf) | |
1100 | return -1; | |
1101 | rc = cciss_scsi_do_inquiry(c, scsi3addr, 0x83, buf, 64); | |
1102 | if (rc == 0) | |
1103 | memcpy(device_id, &buf[8], buflen); | |
1104 | kfree(buf); | |
1105 | return rc != 0; | |
1106 | } | |
1107 | ||
1da177e4 LT |
1108 | static int |
1109 | cciss_scsi_do_report_phys_luns(ctlr_info_t *c, | |
1110 | ReportLunData_struct *buf, int bufsize) | |
1111 | { | |
1112 | int rc; | |
1113 | CommandList_struct *cp; | |
1114 | unsigned char cdb[12]; | |
1115 | unsigned char scsi3addr[8]; | |
1116 | ErrorInfo_struct *ei; | |
1117 | unsigned long flags; | |
1118 | ||
1119 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1120 | cp = scsi_cmd_alloc(c); | |
1121 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1122 | if (cp == NULL) { /* trouble... */ | |
1123 | printk("cmd_alloc returned NULL!\n"); | |
1124 | return -1; | |
1125 | } | |
1126 | ||
1127 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
1128 | cdb[0] = CISS_REPORT_PHYS; | |
1129 | cdb[1] = 0; | |
1130 | cdb[2] = 0; | |
1131 | cdb[3] = 0; | |
1132 | cdb[4] = 0; | |
1133 | cdb[5] = 0; | |
1134 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
1135 | cdb[7] = (bufsize >> 16) & 0xFF; | |
1136 | cdb[8] = (bufsize >> 8) & 0xFF; | |
1137 | cdb[9] = bufsize & 0xFF; | |
1138 | cdb[10] = 0; | |
1139 | cdb[11] = 0; | |
1140 | ||
1141 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, | |
1142 | cdb, 12, | |
1143 | (unsigned char *) buf, | |
1144 | bufsize, XFER_READ); | |
1145 | ||
1146 | if (rc != 0) return rc; /* something went wrong */ | |
1147 | ||
1148 | ei = cp->err_info; | |
1149 | if (ei->CommandStatus != 0 && | |
1150 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
1151 | cciss_scsi_interpret_error(cp); | |
1152 | rc = -1; | |
1153 | } | |
1154 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
1155 | scsi_cmd_free(c, cp); | |
1156 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
1157 | return rc; | |
1158 | } | |
1159 | ||
1160 | static void | |
1161 | cciss_update_non_disk_devices(int cntl_num, int hostno) | |
1162 | { | |
1163 | /* the idea here is we could get notified from /proc | |
1164 | that some devices have changed, so we do a report | |
1165 | physical luns cmd, and adjust our list of devices | |
1166 | accordingly. (We can't rely on the scsi-mid layer just | |
1167 | doing inquiries, because the "busses" that the scsi | |
1168 | mid-layer probes are totally fabricated by this driver, | |
1169 | so new devices wouldn't show up. | |
1170 | ||
1171 | the scsi3addr's of devices won't change so long as the | |
1172 | adapter is not reset. That means we can rescan and | |
1173 | tell which devices we already know about, vs. new | |
1174 | devices, vs. disappearing devices. | |
1175 | ||
1176 | Also, if you yank out a tape drive, then put in a disk | |
1177 | in it's place, (say, a configured volume from another | |
1178 | array controller for instance) _don't_ poke this driver | |
1179 | (so it thinks it's still a tape, but _do_ poke the scsi | |
1180 | mid layer, so it does an inquiry... the scsi mid layer | |
1181 | will see the physical disk. This would be bad. Need to | |
1182 | think about how to prevent that. One idea would be to | |
1183 | snoop all scsi responses and if an inquiry repsonse comes | |
1184 | back that reports a disk, chuck it an return selection | |
1185 | timeout instead and adjust our table... Not sure i like | |
1186 | that though. | |
1187 | ||
1188 | */ | |
47922d06 MM |
1189 | #define OBDR_TAPE_INQ_SIZE 49 |
1190 | #define OBDR_TAPE_SIG "$DR-10" | |
1da177e4 | 1191 | ReportLunData_struct *ld_buff; |
47922d06 | 1192 | unsigned char *inq_buff; |
1da177e4 LT |
1193 | unsigned char scsi3addr[8]; |
1194 | ctlr_info_t *c; | |
1195 | __u32 num_luns=0; | |
1196 | unsigned char *ch; | |
905bd78f | 1197 | struct cciss_scsi_dev_t *currentsd, *this_device; |
1da177e4 LT |
1198 | int ncurrent=0; |
1199 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1200 | int i; | |
1201 | ||
1202 | c = (ctlr_info_t *) hba[cntl_num]; | |
06ff37ff | 1203 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
47922d06 | 1204 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
905bd78f | 1205 | currentsd = kzalloc(sizeof(*currentsd) * |
1206 | (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); | |
1207 | if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { | |
1208 | printk(KERN_ERR "cciss: out of memory\n"); | |
1209 | goto out; | |
1da177e4 | 1210 | } |
905bd78f | 1211 | this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
1da177e4 LT |
1212 | if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) { |
1213 | ch = &ld_buff->LUNListLength[0]; | |
1214 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1215 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1216 | printk(KERN_WARNING | |
1217 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1218 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1219 | num_luns - CISS_MAX_PHYS_LUN); | |
1220 | num_luns = CISS_MAX_PHYS_LUN; | |
1221 | } | |
1222 | } | |
1223 | else { | |
1224 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1225 | goto out; | |
1226 | } | |
1227 | ||
1228 | ||
1229 | /* adjust our table of devices */ | |
905bd78f | 1230 | for (i = 0; i < num_luns; i++) { |
1da177e4 LT |
1231 | /* for each physical lun, do an inquiry */ |
1232 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
47922d06 | 1233 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
1da177e4 LT |
1234 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
1235 | ||
905bd78f | 1236 | if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, 0, inq_buff, |
1237 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) | |
1da177e4 | 1238 | /* Inquiry failed (msg printed already) */ |
905bd78f | 1239 | continue; /* so we will skip this device. */ |
1240 | ||
1241 | this_device->devtype = (inq_buff[0] & 0x1f); | |
1242 | this_device->bus = -1; | |
1243 | this_device->target = -1; | |
1244 | this_device->lun = -1; | |
1245 | memcpy(this_device->scsi3addr, scsi3addr, 8); | |
1246 | memcpy(this_device->vendor, &inq_buff[8], | |
1247 | sizeof(this_device->vendor)); | |
1248 | memcpy(this_device->model, &inq_buff[16], | |
1249 | sizeof(this_device->model)); | |
1250 | memcpy(this_device->revision, &inq_buff[32], | |
1251 | sizeof(this_device->revision)); | |
1252 | memset(this_device->device_id, 0, | |
1253 | sizeof(this_device->device_id)); | |
1254 | cciss_scsi_get_device_id(hba[cntl_num], scsi3addr, | |
1255 | this_device->device_id, sizeof(this_device->device_id)); | |
1256 | ||
1257 | switch (this_device->devtype) | |
1da177e4 | 1258 | { |
47922d06 MM |
1259 | case 0x05: /* CD-ROM */ { |
1260 | ||
1261 | /* We don't *really* support actual CD-ROM devices, | |
1262 | * just this "One Button Disaster Recovery" tape drive | |
1263 | * which temporarily pretends to be a CD-ROM drive. | |
1264 | * So we check that the device is really an OBDR tape | |
1265 | * device by checking for "$DR-10" in bytes 43-48 of | |
1266 | * the inquiry data. | |
1267 | */ | |
1268 | char obdr_sig[7]; | |
1269 | ||
1270 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1271 | obdr_sig[6] = '\0'; | |
1272 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1273 | /* Not OBDR device, ignore it. */ | |
1274 | break; | |
1275 | } | |
1276 | /* fall through . . . */ | |
1da177e4 LT |
1277 | case 0x01: /* sequential access, (tape) */ |
1278 | case 0x08: /* medium changer */ | |
1279 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1280 | printk(KERN_INFO "cciss%d: %s ignored, " | |
1281 | "too many devices.\n", cntl_num, | |
905bd78f | 1282 | scsi_device_type(this_device->devtype)); |
1da177e4 LT |
1283 | break; |
1284 | } | |
905bd78f | 1285 | currentsd[ncurrent] = *this_device; |
1da177e4 LT |
1286 | ncurrent++; |
1287 | break; | |
1288 | default: | |
1289 | break; | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent); | |
1294 | out: | |
1295 | kfree(inq_buff); | |
1296 | kfree(ld_buff); | |
905bd78f | 1297 | kfree(currentsd); |
1da177e4 LT |
1298 | return; |
1299 | } | |
1300 | ||
1301 | static int | |
1302 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1303 | { | |
1304 | int verb_len = strlen(verb); | |
1305 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1306 | return verb_len; | |
1307 | else | |
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | static int | |
1312 | cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length) | |
1313 | { | |
1314 | int arg_len; | |
1315 | ||
1316 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
1317 | cciss_update_non_disk_devices(ctlr, hostno); | |
1318 | else | |
1319 | return -EINVAL; | |
1320 | return length; | |
1321 | } | |
1322 | ||
1323 | ||
1324 | static int | |
1325 | cciss_scsi_proc_info(struct Scsi_Host *sh, | |
1326 | char *buffer, /* data buffer */ | |
1327 | char **start, /* where data in buffer starts */ | |
1328 | off_t offset, /* offset from start of imaginary file */ | |
1329 | int length, /* length of data in buffer */ | |
1330 | int func) /* 0 == read, 1 == write */ | |
1331 | { | |
1332 | ||
1333 | int buflen, datalen; | |
1334 | ctlr_info_t *ci; | |
b9f0bd08 | 1335 | int i; |
1da177e4 LT |
1336 | int cntl_num; |
1337 | ||
1338 | ||
1339 | ci = (ctlr_info_t *) sh->hostdata[0]; | |
1340 | if (ci == NULL) /* This really shouldn't ever happen. */ | |
1341 | return -EINVAL; | |
1342 | ||
1343 | cntl_num = ci->ctlr; /* Get our index into the hba[] array */ | |
1344 | ||
1345 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ | |
b9f0bd08 MM |
1346 | buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", |
1347 | cntl_num, sh->host_no); | |
1348 | ||
1349 | /* this information is needed by apps to know which cciss | |
1350 | device corresponds to which scsi host number without | |
1351 | having to open a scsi target device node. The device | |
1352 | information is not a duplicate of /proc/scsi/scsi because | |
1353 | the two may be out of sync due to scsi hotplug, rather | |
1354 | this info is for an app to be able to use to know how to | |
1355 | get them back in sync. */ | |
1356 | ||
1357 | for (i=0;i<ccissscsi[cntl_num].ndevices;i++) { | |
1358 | struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i]; | |
1359 | buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " | |
1360 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1361 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1362 | sd->devtype, | |
1363 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1364 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1365 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1366 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1367 | } | |
1da177e4 LT |
1368 | datalen = buflen - offset; |
1369 | if (datalen < 0) { /* they're reading past EOF. */ | |
1370 | datalen = 0; | |
1371 | *start = buffer+buflen; | |
1372 | } else | |
1373 | *start = buffer + offset; | |
1374 | return(datalen); | |
1375 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ | |
1376 | return cciss_scsi_user_command(cntl_num, sh->host_no, | |
1377 | buffer, length); | |
1378 | } | |
1379 | ||
1380 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1381 | dma mapping and fills in the scatter gather entries of the | |
1382 | cciss command, cp. */ | |
1383 | ||
87c3a922 SC |
1384 | static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *cp, |
1385 | struct scsi_cmnd *cmd) | |
1da177e4 | 1386 | { |
41ce639a FT |
1387 | unsigned int len; |
1388 | struct scatterlist *sg; | |
1da177e4 | 1389 | __u64 addr64; |
87c3a922 SC |
1390 | int request_nsgs, i, chained, sg_index; |
1391 | struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr; | |
1392 | SGDescriptor_struct *curr_sg; | |
1393 | ||
1394 | BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); | |
1395 | ||
1396 | chained = 0; | |
1397 | sg_index = 0; | |
1398 | curr_sg = cp->SG; | |
1399 | request_nsgs = scsi_dma_map(cmd); | |
1400 | if (request_nsgs) { | |
1401 | scsi_for_each_sg(cmd, sg, request_nsgs, i) { | |
1402 | if (sg_index + 1 == h->max_cmd_sgentries && | |
1403 | !chained && request_nsgs - i > 1) { | |
1404 | chained = 1; | |
1405 | sg_index = 0; | |
1406 | curr_sg = sa->cmd_sg_list[cp->cmdindex]; | |
1407 | } | |
41ce639a FT |
1408 | addr64 = (__u64) sg_dma_address(sg); |
1409 | len = sg_dma_len(sg); | |
87c3a922 SC |
1410 | curr_sg[sg_index].Addr.lower = |
1411 | (__u32) (addr64 & 0x0FFFFFFFFULL); | |
1412 | curr_sg[sg_index].Addr.upper = | |
1413 | (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); | |
1414 | curr_sg[sg_index].Len = len; | |
1415 | curr_sg[sg_index].Ext = 0; | |
1416 | ++sg_index; | |
1da177e4 | 1417 | } |
87c3a922 SC |
1418 | if (chained) |
1419 | cciss_map_sg_chain_block(h, cp, | |
1420 | sa->cmd_sg_list[cp->cmdindex], | |
1421 | (request_nsgs - (h->max_cmd_sgentries - 1)) * | |
1422 | sizeof(SGDescriptor_struct)); | |
41ce639a | 1423 | } |
87c3a922 SC |
1424 | /* track how many SG entries we are using */ |
1425 | if (request_nsgs > h->maxSG) | |
1426 | h->maxSG = request_nsgs; | |
1427 | cp->Header.SGTotal = (__u8) request_nsgs + chained; | |
1428 | if (request_nsgs > h->max_cmd_sgentries) | |
1429 | cp->Header.SGList = h->max_cmd_sgentries; | |
1430 | else | |
1431 | cp->Header.SGList = cp->Header.SGTotal; | |
1da177e4 LT |
1432 | return; |
1433 | } | |
1434 | ||
1435 | ||
1436 | static int | |
1437 | cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) | |
1438 | { | |
bf887378 | 1439 | ctlr_info_t *c; |
1da177e4 LT |
1440 | int ctlr, rc; |
1441 | unsigned char scsi3addr[8]; | |
1442 | CommandList_struct *cp; | |
1443 | unsigned long flags; | |
1444 | ||
1445 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1446 | // We violate cmd->host privacy here. (Is there another way?) | |
bf887378 SC |
1447 | c = (ctlr_info_t *) cmd->device->host->hostdata[0]; |
1448 | ctlr = c->ctlr; | |
1da177e4 LT |
1449 | |
1450 | rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id, | |
1451 | cmd->device->lun, scsi3addr); | |
1452 | if (rc != 0) { | |
1453 | /* the scsi nexus does not match any that we presented... */ | |
1454 | /* pretend to mid layer that we got selection timeout */ | |
1455 | cmd->result = DID_NO_CONNECT << 16; | |
1456 | done(cmd); | |
1457 | /* we might want to think about registering controller itself | |
1458 | as a processor device on the bus so sg binds to it. */ | |
1459 | return 0; | |
1460 | } | |
1461 | ||
1462 | /* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n", | |
1463 | cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/ | |
1464 | // printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel, | |
1465 | // cmd->target, cmd->lun); | |
1466 | ||
1467 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and | |
1468 | see what the device thinks of it. */ | |
1469 | ||
1470 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
bf887378 | 1471 | cp = scsi_cmd_alloc(c); |
1da177e4 LT |
1472 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
1473 | if (cp == NULL) { /* trouble... */ | |
1474 | printk("scsi_cmd_alloc returned NULL!\n"); | |
1475 | /* FIXME: next 3 lines are -> BAD! <- */ | |
1476 | cmd->result = DID_NO_CONNECT << 16; | |
1477 | done(cmd); | |
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | // Fill in the command list header | |
1482 | ||
1483 | cmd->scsi_done = done; // save this for use by completion code | |
1484 | ||
1485 | // save cp in case we have to abort it | |
1486 | cmd->host_scribble = (unsigned char *) cp; | |
1487 | ||
1488 | cp->cmd_type = CMD_SCSI; | |
1489 | cp->scsi_cmd = cmd; | |
1490 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
1491 | memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1492 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
1493 | ||
1494 | // Fill in the request block... | |
1495 | ||
1496 | cp->Request.Timeout = 0; | |
1497 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
089fe1b2 | 1498 | BUG_ON(cmd->cmd_len > sizeof(cp->Request.CDB)); |
1da177e4 LT |
1499 | cp->Request.CDBLen = cmd->cmd_len; |
1500 | memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1501 | cp->Request.Type.Type = TYPE_CMD; | |
1502 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
1503 | switch(cmd->sc_data_direction) | |
1504 | { | |
1505 | case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break; | |
1506 | case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break; | |
1507 | case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break; | |
1508 | case DMA_BIDIRECTIONAL: | |
1509 | // This can happen if a buggy application does a scsi passthru | |
1510 | // and sets both inlen and outlen to non-zero. ( see | |
1511 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1512 | ||
1513 | cp->Request.Type.Direction = XFER_RSVD; | |
1514 | // This is technically wrong, and cciss controllers should | |
1515 | // reject it with CMD_INVALID, which is the most correct | |
1516 | // response, but non-fibre backends appear to let it | |
1517 | // slide by, and give the same results as if this field | |
1518 | // were set correctly. Either way is acceptable for | |
1519 | // our purposes here. | |
1520 | ||
1521 | break; | |
1522 | ||
1523 | default: | |
1524 | printk("cciss: unknown data direction: %d\n", | |
1525 | cmd->sc_data_direction); | |
1526 | BUG(); | |
1527 | break; | |
1528 | } | |
87c3a922 | 1529 | cciss_scatter_gather(c, cp, cmd); |
1da177e4 LT |
1530 | |
1531 | /* Put the request on the tail of the request queue */ | |
1532 | ||
1533 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
bf887378 SC |
1534 | addQ(&c->reqQ, cp); |
1535 | c->Qdepth++; | |
1536 | start_io(c); | |
1da177e4 LT |
1537 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
1538 | ||
1539 | /* the cmd'll come back via intr handler in complete_scsi_command() */ | |
1540 | return 0; | |
1541 | } | |
1542 | ||
1543 | static void | |
1544 | cciss_unregister_scsi(int ctlr) | |
1545 | { | |
1546 | struct cciss_scsi_adapter_data_t *sa; | |
1547 | struct cciss_scsi_cmd_stack_t *stk; | |
1548 | unsigned long flags; | |
1549 | ||
1550 | /* we are being forcibly unloaded, and may not refuse. */ | |
1551 | ||
1552 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
aad9fb6f | 1553 | sa = hba[ctlr]->scsi_ctlr; |
1da177e4 LT |
1554 | stk = &sa->cmd_stack; |
1555 | ||
1556 | /* if we weren't ever actually registered, don't unregister */ | |
1557 | if (sa->registered) { | |
1558 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1559 | scsi_remove_host(sa->scsi_host); | |
1560 | scsi_host_put(sa->scsi_host); | |
1561 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1562 | } | |
1563 | ||
1564 | /* set scsi_host to NULL so our detect routine will | |
1565 | find us on register */ | |
1566 | sa->scsi_host = NULL; | |
6195057f | 1567 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
1da177e4 LT |
1568 | scsi_cmd_stack_free(ctlr); |
1569 | kfree(sa); | |
1da177e4 LT |
1570 | } |
1571 | ||
1da177e4 LT |
1572 | static int |
1573 | cciss_engage_scsi(int ctlr) | |
1574 | { | |
1575 | struct cciss_scsi_adapter_data_t *sa; | |
1576 | struct cciss_scsi_cmd_stack_t *stk; | |
1577 | unsigned long flags; | |
1578 | ||
1579 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
aad9fb6f | 1580 | sa = hba[ctlr]->scsi_ctlr; |
1da177e4 LT |
1581 | stk = &sa->cmd_stack; |
1582 | ||
f4a93bcd | 1583 | if (sa->registered) { |
1da177e4 LT |
1584 | printk("cciss%d: SCSI subsystem already engaged.\n", ctlr); |
1585 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
8721c81f | 1586 | return -ENXIO; |
1da177e4 | 1587 | } |
f4a93bcd | 1588 | sa->registered = 1; |
1da177e4 LT |
1589 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
1590 | cciss_update_non_disk_devices(ctlr, -1); | |
f4a93bcd | 1591 | cciss_scsi_detect(ctlr); |
1da177e4 LT |
1592 | return 0; |
1593 | } | |
1594 | ||
1595 | static void | |
89b6e743 | 1596 | cciss_seq_tape_report(struct seq_file *seq, int ctlr) |
1da177e4 LT |
1597 | { |
1598 | unsigned long flags; | |
1da177e4 LT |
1599 | |
1600 | CPQ_TAPE_LOCK(ctlr, flags); | |
89b6e743 | 1601 | seq_printf(seq, |
b9f0bd08 | 1602 | "Sequential access devices: %d\n\n", |
1da177e4 LT |
1603 | ccissscsi[ctlr].ndevices); |
1604 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1da177e4 LT |
1605 | } |
1606 | ||
88f627ae SC |
1607 | static int wait_for_device_to_become_ready(ctlr_info_t *h, |
1608 | unsigned char lunaddr[]) | |
1609 | { | |
1610 | int rc; | |
1611 | int count = 0; | |
1612 | int waittime = HZ; | |
1613 | CommandList_struct *c; | |
1614 | ||
1615 | c = cmd_alloc(h, 1); | |
1616 | if (!c) { | |
1617 | printk(KERN_WARNING "cciss%d: out of memory in " | |
1618 | "wait_for_device_to_become_ready.\n", h->ctlr); | |
1619 | return IO_ERROR; | |
1620 | } | |
1621 | ||
1622 | /* Send test unit ready until device ready, or give up. */ | |
1623 | while (count < 20) { | |
1624 | ||
1625 | /* Wait for a bit. do this first, because if we send | |
1626 | * the TUR right away, the reset will just abort it. | |
1627 | */ | |
40df6ae4 | 1628 | schedule_timeout_uninterruptible(waittime); |
88f627ae SC |
1629 | count++; |
1630 | ||
1631 | /* Increase wait time with each try, up to a point. */ | |
1632 | if (waittime < (HZ * 30)) | |
1633 | waittime = waittime * 2; | |
1634 | ||
1635 | /* Send the Test Unit Ready */ | |
b57695fe | 1636 | rc = fill_cmd(c, TEST_UNIT_READY, h->ctlr, NULL, 0, 0, |
88f627ae | 1637 | lunaddr, TYPE_CMD); |
85cc61ae | 1638 | if (rc == 0) |
1639 | rc = sendcmd_withirq_core(h, c, 0); | |
1640 | ||
1641 | (void) process_sendcmd_error(h, c); | |
88f627ae | 1642 | |
3969251b | 1643 | if (rc != 0) |
1644 | goto retry_tur; | |
88f627ae | 1645 | |
3969251b | 1646 | if (c->err_info->CommandStatus == CMD_SUCCESS) |
88f627ae SC |
1647 | break; |
1648 | ||
3969251b | 1649 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && |
1650 | c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { | |
1651 | if (c->err_info->SenseInfo[2] == NO_SENSE) | |
1652 | break; | |
1653 | if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { | |
1654 | unsigned char asc; | |
1655 | asc = c->err_info->SenseInfo[12]; | |
1656 | check_for_unit_attention(h, c); | |
1657 | if (asc == POWER_OR_RESET) | |
1658 | break; | |
1659 | } | |
1660 | } | |
1661 | retry_tur: | |
88f627ae SC |
1662 | printk(KERN_WARNING "cciss%d: Waiting %d secs " |
1663 | "for device to become ready.\n", | |
1664 | h->ctlr, waittime / HZ); | |
1665 | rc = 1; /* device not ready. */ | |
1666 | } | |
1667 | ||
1668 | if (rc) | |
1669 | printk("cciss%d: giving up on device.\n", h->ctlr); | |
1670 | else | |
1671 | printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr); | |
1672 | ||
1673 | cmd_free(h, c, 1); | |
1674 | return rc; | |
1675 | } | |
89b6e743 | 1676 | |
3da8b713 | 1677 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
1678 | * complaining. Doing a host- or bus-reset can't do anything good here. | |
1679 | * Despite what it might say in scsi_error.c, there may well be commands | |
1680 | * on the controller, as the cciss driver registers twice, once as a block | |
1681 | * device for the logical drives, and once as a scsi device, for any tape | |
1682 | * drives. So we know there are no commands out on the tape drives, but we | |
1683 | * don't know there are no commands on the controller, and it is likely | |
1684 | * that there probably are, as the cciss block device is most commonly used | |
1685 | * as a boot device (embedded controller on HP/Compaq systems.) | |
1686 | */ | |
1687 | ||
1688 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) | |
1689 | { | |
1690 | int rc; | |
1691 | CommandList_struct *cmd_in_trouble; | |
88f627ae | 1692 | unsigned char lunaddr[8]; |
bf887378 | 1693 | ctlr_info_t *c; |
3da8b713 | 1694 | int ctlr; |
1695 | ||
1696 | /* find the controller to which the command to be aborted was sent */ | |
bf887378 | 1697 | c = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
3da8b713 | 1698 | if (c == NULL) /* paranoia */ |
1699 | return FAILED; | |
bf887378 | 1700 | ctlr = c->ctlr; |
3da8b713 | 1701 | printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr); |
3da8b713 | 1702 | /* find the command that's giving us trouble */ |
1703 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; | |
88f627ae | 1704 | if (cmd_in_trouble == NULL) /* paranoia */ |
3da8b713 | 1705 | return FAILED; |
88f627ae | 1706 | memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); |
3da8b713 | 1707 | /* send a reset to the SCSI LUN which the command was sent to */ |
85cc61ae | 1708 | rc = sendcmd_withirq(CCISS_RESET_MSG, ctlr, NULL, 0, 0, lunaddr, |
3da8b713 | 1709 | TYPE_MSG); |
bf887378 | 1710 | if (rc == 0 && wait_for_device_to_become_ready(c, lunaddr) == 0) |
3da8b713 | 1711 | return SUCCESS; |
1712 | printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr); | |
1713 | return FAILED; | |
1714 | } | |
1715 | ||
1716 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) | |
1717 | { | |
1718 | int rc; | |
1719 | CommandList_struct *cmd_to_abort; | |
85cc61ae | 1720 | unsigned char lunaddr[8]; |
bf887378 | 1721 | ctlr_info_t *c; |
3da8b713 | 1722 | int ctlr; |
1723 | ||
1724 | /* find the controller to which the command to be aborted was sent */ | |
bf887378 | 1725 | c = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
3da8b713 | 1726 | if (c == NULL) /* paranoia */ |
1727 | return FAILED; | |
bf887378 | 1728 | ctlr = c->ctlr; |
3da8b713 | 1729 | printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", ctlr); |
1730 | ||
1731 | /* find the command to be aborted */ | |
1732 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; | |
1733 | if (cmd_to_abort == NULL) /* paranoia */ | |
1734 | return FAILED; | |
85cc61ae | 1735 | memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); |
1736 | rc = sendcmd_withirq(CCISS_ABORT_MSG, ctlr, &cmd_to_abort->Header.Tag, | |
1737 | 0, 0, lunaddr, TYPE_MSG); | |
3da8b713 | 1738 | if (rc == 0) |
1739 | return SUCCESS; | |
1740 | return FAILED; | |
1741 | ||
1742 | } | |
1743 | ||
1da177e4 LT |
1744 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
1745 | ||
1746 | /* If no tape support, then these become defined out of existence */ | |
1747 | ||
1748 | #define cciss_scsi_setup(cntl_num) | |
1da177e4 LT |
1749 | |
1750 | #endif /* CONFIG_CISS_SCSI_TAPE */ |