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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 | ||
60063497 | 36 | #include <linux/atomic.h> |
4e57b681 | 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 | ||
f70dba83 | 47 | static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff, |
88f627ae | 48 | size_t size, |
b57695fe | 49 | __u8 page_code, unsigned char *scsi3addr, |
88f627ae SC |
50 | int cmd_type); |
51 | ||
6b4d96b8 SC |
52 | static CommandList_struct *cmd_alloc(ctlr_info_t *h); |
53 | static CommandList_struct *cmd_special_alloc(ctlr_info_t *h); | |
54 | static void cmd_free(ctlr_info_t *h, CommandList_struct *c); | |
55 | static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c); | |
1da177e4 | 56 | |
e88b7bb0 | 57 | static int cciss_scsi_write_info(struct Scsi_Host *sh, |
1da177e4 | 58 | char *buffer, /* data buffer */ |
e88b7bb0 AV |
59 | int length); /* length of data in buffer */ |
60 | static int cciss_scsi_show_info(struct seq_file *m, | |
61 | struct Scsi_Host *sh); | |
1da177e4 | 62 | |
f281233d JG |
63 | static int cciss_scsi_queue_command (struct Scsi_Host *h, |
64 | struct scsi_cmnd *cmd); | |
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", | |
e88b7bb0 AV |
83 | .write_info = cciss_scsi_write_info, |
84 | .show_info = cciss_scsi_show_info, | |
1da177e4 | 85 | .queuecommand = cciss_scsi_queue_command, |
1da177e4 | 86 | .this_id = 7, |
1da177e4 | 87 | .use_clustering = DISABLE_CLUSTERING, |
3da8b713 | 88 | /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ |
89 | .eh_device_reset_handler= cciss_eh_device_reset_handler, | |
90 | .eh_abort_handler = cciss_eh_abort_handler, | |
1da177e4 LT |
91 | }; |
92 | ||
93 | #pragma pack(1) | |
1b7d0d28 | 94 | |
5e216153 MM |
95 | #define SCSI_PAD_32 8 |
96 | #define SCSI_PAD_64 8 | |
1b7d0d28 | 97 | |
1da177e4 LT |
98 | struct cciss_scsi_cmd_stack_elem_t { |
99 | CommandList_struct cmd; | |
100 | ErrorInfo_struct Err; | |
101 | __u32 busaddr; | |
87c3a922 | 102 | int cmdindex; |
1b7d0d28 | 103 | u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64]; |
1da177e4 LT |
104 | }; |
105 | ||
106 | #pragma pack() | |
107 | ||
1da177e4 LT |
108 | #pragma pack(1) |
109 | struct cciss_scsi_cmd_stack_t { | |
110 | struct cciss_scsi_cmd_stack_elem_t *pool; | |
8a4ec67b | 111 | struct cciss_scsi_cmd_stack_elem_t **elem; |
1da177e4 LT |
112 | dma_addr_t cmd_pool_handle; |
113 | int top; | |
8a4ec67b | 114 | int nelems; |
1da177e4 LT |
115 | }; |
116 | #pragma pack() | |
117 | ||
118 | struct cciss_scsi_adapter_data_t { | |
119 | struct Scsi_Host *scsi_host; | |
120 | struct cciss_scsi_cmd_stack_t cmd_stack; | |
87c3a922 | 121 | SGDescriptor_struct **cmd_sg_list; |
1da177e4 LT |
122 | int registered; |
123 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
124 | }; | |
125 | ||
f70dba83 SC |
126 | #define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \ |
127 | &h->scsi_ctlr->lock, flags); | |
128 | #define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \ | |
129 | &h->scsi_ctlr->lock, flags); | |
1da177e4 LT |
130 | |
131 | static CommandList_struct * | |
132 | scsi_cmd_alloc(ctlr_info_t *h) | |
133 | { | |
134 | /* assume only one process in here at a time, locking done by caller. */ | |
f70dba83 | 135 | /* use h->lock */ |
1da177e4 LT |
136 | /* might be better to rewrite how we allocate scsi commands in a way that */ |
137 | /* needs no locking at all. */ | |
138 | ||
139 | /* take the top memory chunk off the stack and return it, if any. */ | |
140 | struct cciss_scsi_cmd_stack_elem_t *c; | |
141 | struct cciss_scsi_adapter_data_t *sa; | |
142 | struct cciss_scsi_cmd_stack_t *stk; | |
143 | u64bit temp64; | |
144 | ||
aad9fb6f | 145 | sa = h->scsi_ctlr; |
1da177e4 LT |
146 | stk = &sa->cmd_stack; |
147 | ||
148 | if (stk->top < 0) | |
149 | return NULL; | |
150 | c = stk->elem[stk->top]; | |
151 | /* memset(c, 0, sizeof(*c)); */ | |
152 | memset(&c->cmd, 0, sizeof(c->cmd)); | |
153 | memset(&c->Err, 0, sizeof(c->Err)); | |
154 | /* set physical addr of cmd and addr of scsi parameters */ | |
155 | c->cmd.busaddr = c->busaddr; | |
87c3a922 | 156 | c->cmd.cmdindex = c->cmdindex; |
1da177e4 LT |
157 | /* (__u32) (stk->cmd_pool_handle + |
158 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ | |
159 | ||
160 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); | |
161 | /* (__u64) (stk->cmd_pool_handle + | |
162 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + | |
163 | sizeof(CommandList_struct)); */ | |
164 | stk->top--; | |
165 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; | |
166 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; | |
167 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); | |
168 | ||
169 | c->cmd.ctlr = h->ctlr; | |
170 | c->cmd.err_info = &c->Err; | |
171 | ||
172 | return (CommandList_struct *) c; | |
173 | } | |
174 | ||
175 | static void | |
f70dba83 | 176 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
177 | { |
178 | /* assume only one process in here at a time, locking done by caller. */ | |
f70dba83 | 179 | /* use h->lock */ |
1da177e4 LT |
180 | /* drop the free memory chunk on top of the stack. */ |
181 | ||
182 | struct cciss_scsi_adapter_data_t *sa; | |
183 | struct cciss_scsi_cmd_stack_t *stk; | |
184 | ||
aad9fb6f | 185 | sa = h->scsi_ctlr; |
1da177e4 | 186 | stk = &sa->cmd_stack; |
713b6864 | 187 | stk->top++; |
8a4ec67b | 188 | if (stk->top >= stk->nelems) { |
b2a4a43d SC |
189 | dev_err(&h->pdev->dev, |
190 | "scsi_cmd_free called too many times.\n"); | |
1da177e4 LT |
191 | BUG(); |
192 | } | |
f70dba83 | 193 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c; |
1da177e4 LT |
194 | } |
195 | ||
196 | static int | |
f70dba83 | 197 | scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa) |
1da177e4 LT |
198 | { |
199 | int i; | |
200 | struct cciss_scsi_cmd_stack_t *stk; | |
201 | size_t size; | |
202 | ||
8a4ec67b SC |
203 | stk = &sa->cmd_stack; |
204 | stk->nelems = cciss_tape_cmds + 2; | |
f70dba83 | 205 | sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, |
8a4ec67b | 206 | h->chainsize, stk->nelems); |
f70dba83 | 207 | if (!sa->cmd_sg_list && h->chainsize > 0) |
87c3a922 SC |
208 | return -ENOMEM; |
209 | ||
8a4ec67b | 210 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems; |
1da177e4 | 211 | |
1b7d0d28 SC |
212 | /* Check alignment, see cciss_cmd.h near CommandList_struct def. */ |
213 | BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0); | |
214 | /* pci_alloc_consistent guarantees 32-bit DMA address will be used */ | |
1da177e4 | 215 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) |
f70dba83 | 216 | pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle); |
1da177e4 LT |
217 | |
218 | if (stk->pool == NULL) { | |
8a4ec67b | 219 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems); |
87c3a922 SC |
220 | sa->cmd_sg_list = NULL; |
221 | return -ENOMEM; | |
1da177e4 | 222 | } |
8a4ec67b SC |
223 | stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL); |
224 | if (!stk->elem) { | |
225 | pci_free_consistent(h->pdev, size, stk->pool, | |
226 | stk->cmd_pool_handle); | |
227 | return -1; | |
228 | } | |
229 | for (i = 0; i < stk->nelems; i++) { | |
1da177e4 LT |
230 | stk->elem[i] = &stk->pool[i]; |
231 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
232 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
87c3a922 | 233 | stk->elem[i]->cmdindex = i; |
1da177e4 | 234 | } |
8a4ec67b | 235 | stk->top = stk->nelems-1; |
1da177e4 LT |
236 | return 0; |
237 | } | |
238 | ||
239 | static void | |
f70dba83 | 240 | scsi_cmd_stack_free(ctlr_info_t *h) |
1da177e4 LT |
241 | { |
242 | struct cciss_scsi_adapter_data_t *sa; | |
243 | struct cciss_scsi_cmd_stack_t *stk; | |
244 | size_t size; | |
245 | ||
f70dba83 | 246 | sa = h->scsi_ctlr; |
1da177e4 | 247 | stk = &sa->cmd_stack; |
8a4ec67b | 248 | if (stk->top != stk->nelems-1) { |
b2a4a43d SC |
249 | dev_warn(&h->pdev->dev, |
250 | "bug: %d scsi commands are still outstanding.\n", | |
8a4ec67b | 251 | stk->nelems - stk->top); |
1da177e4 | 252 | } |
8a4ec67b | 253 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems; |
1da177e4 | 254 | |
f70dba83 | 255 | pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle); |
1da177e4 | 256 | stk->pool = NULL; |
8a4ec67b SC |
257 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems); |
258 | kfree(stk->elem); | |
259 | stk->elem = NULL; | |
1da177e4 LT |
260 | } |
261 | ||
400bb236 | 262 | #if 0 |
1da177e4 LT |
263 | static void |
264 | print_cmd(CommandList_struct *cp) | |
265 | { | |
266 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
267 | printk("sglist:%d\n", cp->Header.SGList); | |
268 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
269 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
270 | cp->Header.Tag.lower); | |
8d9c1f86 | 271 | printk("LUN:0x%8phN\n", cp->Header.LUN.LunAddrBytes); |
1da177e4 LT |
272 | printk("CDBLen:%d\n", cp->Request.CDBLen); |
273 | printk("Type:%d\n",cp->Request.Type.Type); | |
274 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
275 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
276 | printk("Timeout:%d\n",cp->Request.Timeout); | |
8d9c1f86 | 277 | printk("CDB: %16ph\n", cp->Request.CDB); |
1da177e4 LT |
278 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", |
279 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
280 | cp->ErrDesc.Len); | |
281 | printk("sgs..........Errorinfo:\n"); | |
282 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
283 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
284 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
285 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
286 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
287 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
288 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
1da177e4 | 289 | } |
1da177e4 LT |
290 | #endif |
291 | ||
292 | static int | |
f70dba83 | 293 | find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun) |
1da177e4 LT |
294 | { |
295 | /* finds an unused bus, target, lun for a new device */ | |
f70dba83 | 296 | /* assumes h->scsi_ctlr->lock is held */ |
1da177e4 LT |
297 | int i, found=0; |
298 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
299 | ||
300 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
301 | ||
302 | target_taken[SELF_SCSI_ID] = 1; | |
f70dba83 SC |
303 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) |
304 | target_taken[ccissscsi[h->ctlr].dev[i].target] = 1; | |
1da177e4 | 305 | |
f70dba83 | 306 | for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) { |
1da177e4 LT |
307 | if (!target_taken[i]) { |
308 | *bus = 0; *target=i; *lun = 0; found=1; | |
309 | break; | |
310 | } | |
311 | } | |
312 | return (!found); | |
313 | } | |
f4a93bcd MM |
314 | struct scsi2map { |
315 | char scsi3addr[8]; | |
316 | int bus, target, lun; | |
317 | }; | |
1da177e4 LT |
318 | |
319 | static int | |
f70dba83 | 320 | cciss_scsi_add_entry(ctlr_info_t *h, int hostno, |
905bd78f | 321 | struct cciss_scsi_dev_t *device, |
f4a93bcd | 322 | struct scsi2map *added, int *nadded) |
1da177e4 | 323 | { |
f70dba83 SC |
324 | /* assumes h->scsi_ctlr->lock is held */ |
325 | int n = ccissscsi[h->ctlr].ndevices; | |
1da177e4 | 326 | struct cciss_scsi_dev_t *sd; |
935dc8d7 MM |
327 | int i, bus, target, lun; |
328 | unsigned char addr1[8], addr2[8]; | |
1da177e4 LT |
329 | |
330 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
b2a4a43d SC |
331 | dev_warn(&h->pdev->dev, "Too many devices, " |
332 | "some will be inaccessible.\n"); | |
1da177e4 LT |
333 | return -1; |
334 | } | |
f4a93bcd | 335 | |
935dc8d7 MM |
336 | bus = target = -1; |
337 | lun = 0; | |
338 | /* Is this device a non-zero lun of a multi-lun device */ | |
339 | /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ | |
905bd78f | 340 | if (device->scsi3addr[4] != 0) { |
935dc8d7 MM |
341 | /* Search through our list and find the device which */ |
342 | /* has the same 8 byte LUN address, excepting byte 4. */ | |
343 | /* Assign the same bus and target for this new LUN. */ | |
344 | /* Use the logical unit number from the firmware. */ | |
905bd78f | 345 | memcpy(addr1, device->scsi3addr, 8); |
935dc8d7 MM |
346 | addr1[4] = 0; |
347 | for (i = 0; i < n; i++) { | |
f70dba83 | 348 | sd = &ccissscsi[h->ctlr].dev[i]; |
935dc8d7 MM |
349 | memcpy(addr2, sd->scsi3addr, 8); |
350 | addr2[4] = 0; | |
351 | /* differ only in byte 4? */ | |
352 | if (memcmp(addr1, addr2, 8) == 0) { | |
353 | bus = sd->bus; | |
354 | target = sd->target; | |
905bd78f | 355 | lun = device->scsi3addr[4]; |
935dc8d7 MM |
356 | break; |
357 | } | |
358 | } | |
359 | } | |
360 | ||
f70dba83 | 361 | sd = &ccissscsi[h->ctlr].dev[n]; |
935dc8d7 | 362 | if (lun == 0) { |
f70dba83 | 363 | if (find_bus_target_lun(h, |
935dc8d7 MM |
364 | &sd->bus, &sd->target, &sd->lun) != 0) |
365 | return -1; | |
366 | } else { | |
367 | sd->bus = bus; | |
368 | sd->target = target; | |
369 | sd->lun = lun; | |
370 | } | |
f4a93bcd MM |
371 | added[*nadded].bus = sd->bus; |
372 | added[*nadded].target = sd->target; | |
373 | added[*nadded].lun = sd->lun; | |
374 | (*nadded)++; | |
375 | ||
905bd78f | 376 | memcpy(sd->scsi3addr, device->scsi3addr, 8); |
377 | memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); | |
378 | memcpy(sd->revision, device->revision, sizeof(sd->revision)); | |
379 | memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); | |
380 | sd->devtype = device->devtype; | |
381 | ||
f70dba83 | 382 | ccissscsi[h->ctlr].ndevices++; |
1da177e4 LT |
383 | |
384 | /* initially, (before registering with scsi layer) we don't | |
385 | know our hostno and we don't want to print anything first | |
386 | time anyway (the scsi layer's inquiries will show that info) */ | |
387 | if (hostno != -1) | |
b2a4a43d SC |
388 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n", |
389 | scsi_device_type(sd->devtype), hostno, | |
1da177e4 LT |
390 | sd->bus, sd->target, sd->lun); |
391 | return 0; | |
392 | } | |
393 | ||
394 | static void | |
f70dba83 | 395 | cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry, |
f4a93bcd | 396 | struct scsi2map *removed, int *nremoved) |
1da177e4 | 397 | { |
f70dba83 | 398 | /* assumes h->ctlr]->scsi_ctlr->lock is held */ |
1da177e4 LT |
399 | int i; |
400 | struct cciss_scsi_dev_t sd; | |
401 | ||
402 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
f70dba83 | 403 | sd = ccissscsi[h->ctlr].dev[entry]; |
f4a93bcd MM |
404 | removed[*nremoved].bus = sd.bus; |
405 | removed[*nremoved].target = sd.target; | |
406 | removed[*nremoved].lun = sd.lun; | |
407 | (*nremoved)++; | |
f70dba83 SC |
408 | for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++) |
409 | ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1]; | |
410 | ccissscsi[h->ctlr].ndevices--; | |
b2a4a43d SC |
411 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n", |
412 | scsi_device_type(sd.devtype), hostno, | |
1da177e4 LT |
413 | sd.bus, sd.target, sd.lun); |
414 | } | |
415 | ||
416 | ||
417 | #define SCSI3ADDR_EQ(a,b) ( \ | |
418 | (a)[7] == (b)[7] && \ | |
419 | (a)[6] == (b)[6] && \ | |
420 | (a)[5] == (b)[5] && \ | |
421 | (a)[4] == (b)[4] && \ | |
422 | (a)[3] == (b)[3] && \ | |
423 | (a)[2] == (b)[2] && \ | |
424 | (a)[1] == (b)[1] && \ | |
425 | (a)[0] == (b)[0]) | |
426 | ||
f70dba83 | 427 | static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr) |
f4a93bcd MM |
428 | { |
429 | /* called when scsi_add_device fails in order to re-adjust */ | |
430 | /* ccissscsi[] to match the mid layer's view. */ | |
431 | unsigned long flags; | |
432 | int i, j; | |
f70dba83 SC |
433 | CPQ_TAPE_LOCK(h, flags); |
434 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
f4a93bcd | 435 | if (memcmp(scsi3addr, |
f70dba83 SC |
436 | ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) { |
437 | for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++) | |
438 | ccissscsi[h->ctlr].dev[j] = | |
439 | ccissscsi[h->ctlr].dev[j+1]; | |
440 | ccissscsi[h->ctlr].ndevices--; | |
f4a93bcd MM |
441 | break; |
442 | } | |
443 | } | |
f70dba83 | 444 | CPQ_TAPE_UNLOCK(h, flags); |
f4a93bcd MM |
445 | } |
446 | ||
905bd78f | 447 | static int device_is_the_same(struct cciss_scsi_dev_t *dev1, |
448 | struct cciss_scsi_dev_t *dev2) | |
449 | { | |
450 | return dev1->devtype == dev2->devtype && | |
451 | memcmp(dev1->scsi3addr, dev2->scsi3addr, | |
452 | sizeof(dev1->scsi3addr)) == 0 && | |
453 | memcmp(dev1->device_id, dev2->device_id, | |
454 | sizeof(dev1->device_id)) == 0 && | |
455 | memcmp(dev1->vendor, dev2->vendor, | |
456 | sizeof(dev1->vendor)) == 0 && | |
457 | memcmp(dev1->model, dev2->model, | |
458 | sizeof(dev1->model)) == 0 && | |
459 | memcmp(dev1->revision, dev2->revision, | |
460 | sizeof(dev1->revision)) == 0; | |
461 | } | |
462 | ||
1da177e4 | 463 | static int |
f70dba83 | 464 | adjust_cciss_scsi_table(ctlr_info_t *h, int hostno, |
1da177e4 LT |
465 | struct cciss_scsi_dev_t sd[], int nsds) |
466 | { | |
467 | /* sd contains scsi3 addresses and devtypes, but | |
468 | bus target and lun are not filled in. This funciton | |
469 | takes what's in sd to be the current and adjusts | |
470 | ccissscsi[] to be in line with what's in sd. */ | |
471 | ||
472 | int i,j, found, changes=0; | |
473 | struct cciss_scsi_dev_t *csd; | |
474 | unsigned long flags; | |
f4a93bcd MM |
475 | struct scsi2map *added, *removed; |
476 | int nadded, nremoved; | |
477 | struct Scsi_Host *sh = NULL; | |
478 | ||
479 | added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
480 | GFP_KERNEL); | |
481 | removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
482 | GFP_KERNEL); | |
483 | ||
484 | if (!added || !removed) { | |
b2a4a43d SC |
485 | dev_warn(&h->pdev->dev, |
486 | "Out of memory in adjust_cciss_scsi_table\n"); | |
f4a93bcd MM |
487 | goto free_and_out; |
488 | } | |
1da177e4 | 489 | |
f70dba83 | 490 | CPQ_TAPE_LOCK(h, flags); |
1da177e4 | 491 | |
f4a93bcd | 492 | if (hostno != -1) /* if it's not the first time... */ |
f70dba83 | 493 | sh = h->scsi_ctlr->scsi_host; |
f4a93bcd | 494 | |
1da177e4 LT |
495 | /* find any devices in ccissscsi[] that are not in |
496 | sd[] and remove them from ccissscsi[] */ | |
497 | ||
498 | i = 0; | |
f4a93bcd MM |
499 | nremoved = 0; |
500 | nadded = 0; | |
f70dba83 SC |
501 | while (i < ccissscsi[h->ctlr].ndevices) { |
502 | csd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
503 | found=0; |
504 | for (j=0;j<nsds;j++) { | |
505 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
506 | csd->scsi3addr)) { | |
905bd78f | 507 | if (device_is_the_same(&sd[j], csd)) |
1da177e4 LT |
508 | found=2; |
509 | else | |
510 | found=1; | |
511 | break; | |
512 | } | |
513 | } | |
514 | ||
515 | if (found == 0) { /* device no longer present. */ | |
516 | changes++; | |
f70dba83 | 517 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
518 | removed, &nremoved); |
519 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 520 | } else if (found == 1) { /* device is different in some way */ |
1da177e4 | 521 | changes++; |
b2a4a43d SC |
522 | dev_info(&h->pdev->dev, |
523 | "device c%db%dt%dl%d has changed.\n", | |
524 | hostno, csd->bus, csd->target, csd->lun); | |
f70dba83 | 525 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
526 | removed, &nremoved); |
527 | /* remove ^^^, hence i not incremented */ | |
f70dba83 | 528 | if (cciss_scsi_add_entry(h, hostno, &sd[j], |
f4a93bcd MM |
529 | added, &nadded) != 0) |
530 | /* we just removed one, so add can't fail. */ | |
531 | BUG(); | |
1da177e4 | 532 | csd->devtype = sd[j].devtype; |
905bd78f | 533 | memcpy(csd->device_id, sd[j].device_id, |
534 | sizeof(csd->device_id)); | |
535 | memcpy(csd->vendor, sd[j].vendor, | |
536 | sizeof(csd->vendor)); | |
537 | memcpy(csd->model, sd[j].model, | |
538 | sizeof(csd->model)); | |
539 | memcpy(csd->revision, sd[j].revision, | |
540 | sizeof(csd->revision)); | |
1da177e4 LT |
541 | } else /* device is same as it ever was, */ |
542 | i++; /* so just move along. */ | |
543 | } | |
544 | ||
545 | /* Now, make sure every device listed in sd[] is also | |
546 | listed in ccissscsi[], adding them if they aren't found */ | |
547 | ||
548 | for (i=0;i<nsds;i++) { | |
549 | found=0; | |
f70dba83 SC |
550 | for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) { |
551 | csd = &ccissscsi[h->ctlr].dev[j]; | |
1da177e4 LT |
552 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, |
553 | csd->scsi3addr)) { | |
905bd78f | 554 | if (device_is_the_same(&sd[i], csd)) |
1da177e4 LT |
555 | found=2; /* found device */ |
556 | else | |
557 | found=1; /* found a bug. */ | |
558 | break; | |
559 | } | |
560 | } | |
561 | if (!found) { | |
562 | changes++; | |
f70dba83 | 563 | if (cciss_scsi_add_entry(h, hostno, &sd[i], |
f4a93bcd | 564 | added, &nadded) != 0) |
1da177e4 LT |
565 | break; |
566 | } else if (found == 1) { | |
567 | /* should never happen... */ | |
568 | changes++; | |
b2a4a43d SC |
569 | dev_warn(&h->pdev->dev, |
570 | "device unexpectedly changed\n"); | |
1da177e4 LT |
571 | /* but if it does happen, we just ignore that device */ |
572 | } | |
573 | } | |
f70dba83 | 574 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 | 575 | |
f4a93bcd MM |
576 | /* Don't notify scsi mid layer of any changes the first time through */ |
577 | /* (or if there are no changes) scsi_scan_host will do it later the */ | |
578 | /* first time through. */ | |
579 | if (hostno == -1 || !changes) | |
580 | goto free_and_out; | |
581 | ||
582 | /* Notify scsi mid layer of any removed devices */ | |
583 | for (i = 0; i < nremoved; i++) { | |
584 | struct scsi_device *sdev = | |
585 | scsi_device_lookup(sh, removed[i].bus, | |
586 | removed[i].target, removed[i].lun); | |
587 | if (sdev != NULL) { | |
588 | scsi_remove_device(sdev); | |
589 | scsi_device_put(sdev); | |
590 | } else { | |
591 | /* We don't expect to get here. */ | |
592 | /* future cmds to this device will get selection */ | |
593 | /* timeout as if the device was gone. */ | |
b2a4a43d | 594 | dev_warn(&h->pdev->dev, "didn't find " |
f4a93bcd | 595 | "c%db%dt%dl%d\n for removal.", |
b2a4a43d | 596 | hostno, removed[i].bus, |
f4a93bcd MM |
597 | removed[i].target, removed[i].lun); |
598 | } | |
599 | } | |
600 | ||
601 | /* Notify scsi mid layer of any added devices */ | |
602 | for (i = 0; i < nadded; i++) { | |
603 | int rc; | |
604 | rc = scsi_add_device(sh, added[i].bus, | |
605 | added[i].target, added[i].lun); | |
606 | if (rc == 0) | |
607 | continue; | |
b2a4a43d | 608 | dev_warn(&h->pdev->dev, "scsi_add_device " |
f4a93bcd | 609 | "c%db%dt%dl%d failed, device not added.\n", |
b2a4a43d | 610 | hostno, added[i].bus, added[i].target, added[i].lun); |
f4a93bcd MM |
611 | /* now we have to remove it from ccissscsi, */ |
612 | /* since it didn't get added to scsi mid layer */ | |
f70dba83 | 613 | fixup_botched_add(h, added[i].scsi3addr); |
f4a93bcd | 614 | } |
1da177e4 | 615 | |
f4a93bcd MM |
616 | free_and_out: |
617 | kfree(added); | |
618 | kfree(removed); | |
1da177e4 LT |
619 | return 0; |
620 | } | |
621 | ||
622 | static int | |
f70dba83 | 623 | lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr) |
1da177e4 LT |
624 | { |
625 | int i; | |
626 | struct cciss_scsi_dev_t *sd; | |
627 | unsigned long flags; | |
628 | ||
f70dba83 SC |
629 | CPQ_TAPE_LOCK(h, flags); |
630 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
631 | sd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
632 | if (sd->bus == bus && |
633 | sd->target == target && | |
634 | sd->lun == lun) { | |
635 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
f70dba83 | 636 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
637 | return 0; |
638 | } | |
639 | } | |
f70dba83 | 640 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
641 | return -1; |
642 | } | |
643 | ||
644 | static void | |
f70dba83 | 645 | cciss_scsi_setup(ctlr_info_t *h) |
1da177e4 LT |
646 | { |
647 | struct cciss_scsi_adapter_data_t * shba; | |
648 | ||
f70dba83 | 649 | ccissscsi[h->ctlr].ndevices = 0; |
1da177e4 LT |
650 | shba = (struct cciss_scsi_adapter_data_t *) |
651 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
652 | if (shba == NULL) | |
653 | return; | |
654 | shba->scsi_host = NULL; | |
655 | spin_lock_init(&shba->lock); | |
656 | shba->registered = 0; | |
f70dba83 | 657 | if (scsi_cmd_stack_setup(h, shba) != 0) { |
1da177e4 LT |
658 | kfree(shba); |
659 | shba = NULL; | |
660 | } | |
f70dba83 | 661 | h->scsi_ctlr = shba; |
1da177e4 LT |
662 | return; |
663 | } | |
664 | ||
f70dba83 SC |
665 | static void complete_scsi_command(CommandList_struct *c, int timeout, |
666 | __u32 tag) | |
1da177e4 LT |
667 | { |
668 | struct scsi_cmnd *cmd; | |
f70dba83 | 669 | ctlr_info_t *h; |
1da177e4 LT |
670 | ErrorInfo_struct *ei; |
671 | ||
f70dba83 | 672 | ei = c->err_info; |
1da177e4 LT |
673 | |
674 | /* First, see if it was a message rather than a command */ | |
f70dba83 SC |
675 | if (c->Request.Type.Type == TYPE_MSG) { |
676 | c->cmd_type = CMD_MSG_DONE; | |
1da177e4 LT |
677 | return; |
678 | } | |
679 | ||
f70dba83 SC |
680 | cmd = (struct scsi_cmnd *) c->scsi_cmd; |
681 | h = hba[c->ctlr]; | |
1da177e4 | 682 | |
41ce639a | 683 | scsi_dma_unmap(cmd); |
f70dba83 SC |
684 | if (c->Header.SGTotal > h->max_cmd_sgentries) |
685 | cciss_unmap_sg_chain_block(h, c); | |
1da177e4 LT |
686 | |
687 | cmd->result = (DID_OK << 16); /* host byte */ | |
688 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
689 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
690 | ||
691 | cmd->result |= (ei->ScsiStatus); | |
692 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
693 | ||
694 | /* copy the sense data whether we need to or not. */ | |
695 | ||
696 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
697 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
698 | SCSI_SENSE_BUFFERSIZE : | |
699 | ei->SenseLen); | |
41ce639a | 700 | scsi_set_resid(cmd, ei->ResidualCnt); |
1da177e4 LT |
701 | |
702 | if(ei->CommandStatus != 0) | |
703 | { /* an error has occurred */ | |
704 | switch(ei->CommandStatus) | |
705 | { | |
706 | case CMD_TARGET_STATUS: | |
707 | /* Pass it up to the upper layers... */ | |
b0cf0b11 | 708 | if (!ei->ScsiStatus) { |
1da177e4 LT |
709 | |
710 | /* Ordinarily, this case should never happen, but there is a bug | |
711 | in some released firmware revisions that allows it to happen | |
712 | if, for example, a 4100 backplane loses power and the tape | |
713 | drive is in it. We assume that it's a fatal error of some | |
714 | kind because we can't show that it wasn't. We will make it | |
715 | look like selection timeout since that is the most common | |
716 | reason for this to occur, and it's severe enough. */ | |
717 | ||
718 | cmd->result = DID_NO_CONNECT << 16; | |
719 | } | |
720 | break; | |
721 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
722 | break; | |
723 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 724 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 725 | " completed with data overrun " |
f70dba83 | 726 | "reported\n", c); |
1da177e4 LT |
727 | break; |
728 | case CMD_INVALID: { | |
8d9c1f86 AS |
729 | /* |
730 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, c, sizeof(*c), false); | |
731 | print_cmd(c); | |
732 | */ | |
1da177e4 LT |
733 | /* We get CMD_INVALID if you address a non-existent tape drive instead |
734 | of a selection timeout (no response). You will see this if you yank | |
735 | out a tape drive, then try to access it. This is kind of a shame | |
736 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
737 | get interpreted as a missing target. */ | |
738 | cmd->result = DID_NO_CONNECT << 16; | |
739 | } | |
740 | break; | |
741 | case CMD_PROTOCOL_ERR: | |
2453f5f9 | 742 | cmd->result = DID_ERROR << 16; |
b2a4a43d SC |
743 | dev_warn(&h->pdev->dev, |
744 | "%p has protocol error\n", c); | |
1da177e4 LT |
745 | break; |
746 | case CMD_HARDWARE_ERR: | |
747 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
748 | dev_warn(&h->pdev->dev, |
749 | "%p had hardware error\n", c); | |
1da177e4 LT |
750 | break; |
751 | case CMD_CONNECTION_LOST: | |
752 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
753 | dev_warn(&h->pdev->dev, |
754 | "%p had connection lost\n", c); | |
1da177e4 LT |
755 | break; |
756 | case CMD_ABORTED: | |
757 | cmd->result = DID_ABORT << 16; | |
b2a4a43d | 758 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
759 | break; |
760 | case CMD_ABORT_FAILED: | |
761 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
762 | dev_warn(&h->pdev->dev, |
763 | "%p reports abort failed\n", c); | |
1da177e4 LT |
764 | break; |
765 | case CMD_UNSOLICITED_ABORT: | |
766 | cmd->result = DID_ABORT << 16; | |
6d9a4f9e | 767 | dev_warn(&h->pdev->dev, "%p aborted due to an " |
b2a4a43d | 768 | "unsolicited abort\n", c); |
1da177e4 LT |
769 | break; |
770 | case CMD_TIMEOUT: | |
771 | cmd->result = DID_TIME_OUT << 16; | |
b2a4a43d | 772 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 | 773 | break; |
6d9a4f9e SC |
774 | case CMD_UNABORTABLE: |
775 | cmd->result = DID_ERROR << 16; | |
776 | dev_warn(&h->pdev->dev, "c %p command " | |
777 | "unabortable\n", c); | |
778 | break; | |
1da177e4 LT |
779 | default: |
780 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
781 | dev_warn(&h->pdev->dev, |
782 | "%p returned unknown status %x\n", c, | |
1da177e4 LT |
783 | ei->CommandStatus); |
784 | } | |
785 | } | |
1da177e4 | 786 | cmd->scsi_done(cmd); |
f70dba83 | 787 | scsi_cmd_free(h, c); |
1da177e4 LT |
788 | } |
789 | ||
790 | static int | |
f70dba83 | 791 | cciss_scsi_detect(ctlr_info_t *h) |
1da177e4 LT |
792 | { |
793 | struct Scsi_Host *sh; | |
794 | int error; | |
795 | ||
796 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
797 | if (sh == NULL) | |
798 | goto fail; | |
799 | sh->io_port = 0; // good enough? FIXME, | |
800 | sh->n_io_port = 0; // I don't think we use these two... | |
801 | sh->this_id = SELF_SCSI_ID; | |
8a4ec67b | 802 | sh->can_queue = cciss_tape_cmds; |
f70dba83 | 803 | sh->sg_tablesize = h->maxsgentries; |
79600aad | 804 | sh->max_cmd_len = MAX_COMMAND_SIZE; |
395d2875 | 805 | sh->max_sectors = h->cciss_max_sectors; |
1da177e4 LT |
806 | |
807 | ((struct cciss_scsi_adapter_data_t *) | |
f70dba83 SC |
808 | h->scsi_ctlr)->scsi_host = sh; |
809 | sh->hostdata[0] = (unsigned long) h; | |
810 | sh->irq = h->intr[SIMPLE_MODE_INT]; | |
1da177e4 | 811 | sh->unique_id = sh->irq; |
f70dba83 | 812 | error = scsi_add_host(sh, &h->pdev->dev); |
1da177e4 LT |
813 | if (error) |
814 | goto fail_host_put; | |
815 | scsi_scan_host(sh); | |
816 | return 1; | |
817 | ||
818 | fail_host_put: | |
819 | scsi_host_put(sh); | |
820 | fail: | |
821 | return 0; | |
822 | } | |
823 | ||
824 | static void | |
825 | cciss_unmap_one(struct pci_dev *pdev, | |
f70dba83 | 826 | CommandList_struct *c, |
1da177e4 LT |
827 | size_t buflen, |
828 | int data_direction) | |
829 | { | |
830 | u64bit addr64; | |
831 | ||
f70dba83 SC |
832 | addr64.val32.lower = c->SG[0].Addr.lower; |
833 | addr64.val32.upper = c->SG[0].Addr.upper; | |
1da177e4 LT |
834 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); |
835 | } | |
836 | ||
837 | static void | |
838 | cciss_map_one(struct pci_dev *pdev, | |
f70dba83 | 839 | CommandList_struct *c, |
1da177e4 LT |
840 | unsigned char *buf, |
841 | size_t buflen, | |
842 | int data_direction) | |
843 | { | |
844 | __u64 addr64; | |
845 | ||
846 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
f70dba83 | 847 | c->SG[0].Addr.lower = |
1da177e4 | 848 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); |
f70dba83 | 849 | c->SG[0].Addr.upper = |
1da177e4 | 850 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); |
f70dba83 SC |
851 | c->SG[0].Len = buflen; |
852 | c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
853 | c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
1da177e4 LT |
854 | } |
855 | ||
856 | static int | |
f70dba83 SC |
857 | cciss_scsi_do_simple_cmd(ctlr_info_t *h, |
858 | CommandList_struct *c, | |
1da177e4 LT |
859 | unsigned char *scsi3addr, |
860 | unsigned char *cdb, | |
861 | unsigned char cdblen, | |
862 | unsigned char *buf, int bufsize, | |
863 | int direction) | |
864 | { | |
6e9a4738 | 865 | DECLARE_COMPLETION_ONSTACK(wait); |
1da177e4 | 866 | |
f70dba83 SC |
867 | c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */ |
868 | c->scsi_cmd = NULL; | |
869 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
870 | memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN)); | |
871 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
872 | // Fill in the request block... |
873 | ||
874 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
875 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
876 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
877 | ||
f70dba83 SC |
878 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); |
879 | memcpy(c->Request.CDB, cdb, cdblen); | |
880 | c->Request.Timeout = 0; | |
881 | c->Request.CDBLen = cdblen; | |
882 | c->Request.Type.Type = TYPE_CMD; | |
883 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
884 | c->Request.Type.Direction = direction; | |
1da177e4 LT |
885 | |
886 | /* Fill in the SG list and do dma mapping */ | |
f70dba83 | 887 | cciss_map_one(h->pdev, c, (unsigned char *) buf, |
1da177e4 LT |
888 | bufsize, DMA_FROM_DEVICE); |
889 | ||
f70dba83 SC |
890 | c->waiting = &wait; |
891 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
892 | wait_for_completion(&wait); |
893 | ||
894 | /* undo the dma mapping */ | |
f70dba83 | 895 | cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE); |
1da177e4 LT |
896 | return(0); |
897 | } | |
898 | ||
899 | static void | |
b2a4a43d | 900 | cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
901 | { |
902 | ErrorInfo_struct *ei; | |
903 | ||
f70dba83 | 904 | ei = c->err_info; |
1da177e4 LT |
905 | switch(ei->CommandStatus) |
906 | { | |
907 | case CMD_TARGET_STATUS: | |
b2a4a43d SC |
908 | dev_warn(&h->pdev->dev, |
909 | "cmd %p has completed with errors\n", c); | |
910 | dev_warn(&h->pdev->dev, | |
911 | "cmd %p has SCSI Status = %x\n", | |
912 | c, ei->ScsiStatus); | |
1da177e4 | 913 | if (ei->ScsiStatus == 0) |
b2a4a43d SC |
914 | dev_warn(&h->pdev->dev, |
915 | "SCSI status is abnormally zero. " | |
1da177e4 LT |
916 | "(probably indicates selection timeout " |
917 | "reported incorrectly due to a known " | |
918 | "firmware bug, circa July, 2001.)\n"); | |
919 | break; | |
920 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
b2a4a43d | 921 | dev_info(&h->pdev->dev, "UNDERRUN\n"); |
1da177e4 LT |
922 | break; |
923 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 924 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 925 | " completed with data overrun " |
f70dba83 | 926 | "reported\n", c); |
1da177e4 LT |
927 | break; |
928 | case CMD_INVALID: { | |
929 | /* controller unfortunately reports SCSI passthru's */ | |
930 | /* to non-existent targets as invalid commands. */ | |
b2a4a43d SC |
931 | dev_warn(&h->pdev->dev, |
932 | "%p is reported invalid (probably means " | |
f70dba83 | 933 | "target device no longer present)\n", c); |
8d9c1f86 AS |
934 | /* |
935 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, c, sizeof(*c), false); | |
936 | print_cmd(c); | |
937 | */ | |
1da177e4 LT |
938 | } |
939 | break; | |
940 | case CMD_PROTOCOL_ERR: | |
b2a4a43d | 941 | dev_warn(&h->pdev->dev, "%p has protocol error\n", c); |
1da177e4 LT |
942 | break; |
943 | case CMD_HARDWARE_ERR: | |
944 | /* cmd->result = DID_ERROR << 16; */ | |
b2a4a43d | 945 | dev_warn(&h->pdev->dev, "%p had hardware error\n", c); |
1da177e4 LT |
946 | break; |
947 | case CMD_CONNECTION_LOST: | |
b2a4a43d | 948 | dev_warn(&h->pdev->dev, "%p had connection lost\n", c); |
1da177e4 LT |
949 | break; |
950 | case CMD_ABORTED: | |
b2a4a43d | 951 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
952 | break; |
953 | case CMD_ABORT_FAILED: | |
b2a4a43d SC |
954 | dev_warn(&h->pdev->dev, |
955 | "%p reports abort failed\n", c); | |
1da177e4 LT |
956 | break; |
957 | case CMD_UNSOLICITED_ABORT: | |
b2a4a43d | 958 | dev_warn(&h->pdev->dev, |
6d9a4f9e | 959 | "%p aborted due to an unsolicited abort\n", c); |
1da177e4 LT |
960 | break; |
961 | case CMD_TIMEOUT: | |
b2a4a43d | 962 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 | 963 | break; |
6d9a4f9e SC |
964 | case CMD_UNABORTABLE: |
965 | dev_warn(&h->pdev->dev, | |
966 | "%p unabortable\n", c); | |
967 | break; | |
1da177e4 | 968 | default: |
b2a4a43d SC |
969 | dev_warn(&h->pdev->dev, |
970 | "%p returned unknown status %x\n", | |
971 | c, ei->CommandStatus); | |
1da177e4 LT |
972 | } |
973 | } | |
974 | ||
975 | static int | |
f70dba83 | 976 | cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 977 | unsigned char page, unsigned char *buf, |
978 | unsigned char bufsize) | |
1da177e4 LT |
979 | { |
980 | int rc; | |
f70dba83 | 981 | CommandList_struct *c; |
1da177e4 LT |
982 | char cdb[6]; |
983 | ErrorInfo_struct *ei; | |
984 | unsigned long flags; | |
985 | ||
f70dba83 SC |
986 | spin_lock_irqsave(&h->lock, flags); |
987 | c = scsi_cmd_alloc(h); | |
988 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 | 989 | |
f70dba83 | 990 | if (c == NULL) { /* trouble... */ |
1da177e4 LT |
991 | printk("cmd_alloc returned NULL!\n"); |
992 | return -1; | |
993 | } | |
994 | ||
f70dba83 | 995 | ei = c->err_info; |
1da177e4 LT |
996 | |
997 | cdb[0] = CISS_INQUIRY; | |
905bd78f | 998 | cdb[1] = (page != 0); |
999 | cdb[2] = page; | |
1da177e4 | 1000 | cdb[3] = 0; |
47922d06 | 1001 | cdb[4] = bufsize; |
1da177e4 | 1002 | cdb[5] = 0; |
f70dba83 | 1003 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb, |
47922d06 | 1004 | 6, buf, bufsize, XFER_READ); |
1da177e4 LT |
1005 | |
1006 | if (rc != 0) return rc; /* something went wrong */ | |
1007 | ||
1008 | if (ei->CommandStatus != 0 && | |
1009 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1010 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1011 | rc = -1; |
1012 | } | |
f70dba83 SC |
1013 | spin_lock_irqsave(&h->lock, flags); |
1014 | scsi_cmd_free(h, c); | |
1015 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1016 | return rc; |
1017 | } | |
1018 | ||
905bd78f | 1019 | /* Get the device id from inquiry page 0x83 */ |
f70dba83 | 1020 | static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1021 | unsigned char *device_id, int buflen) |
1022 | { | |
1023 | int rc; | |
1024 | unsigned char *buf; | |
1025 | ||
1026 | if (buflen > 16) | |
1027 | buflen = 16; | |
1028 | buf = kzalloc(64, GFP_KERNEL); | |
1029 | if (!buf) | |
1030 | return -1; | |
f70dba83 | 1031 | rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); |
905bd78f | 1032 | if (rc == 0) |
1033 | memcpy(device_id, &buf[8], buflen); | |
1034 | kfree(buf); | |
1035 | return rc != 0; | |
1036 | } | |
1037 | ||
1da177e4 | 1038 | static int |
f70dba83 | 1039 | cciss_scsi_do_report_phys_luns(ctlr_info_t *h, |
1da177e4 LT |
1040 | ReportLunData_struct *buf, int bufsize) |
1041 | { | |
1042 | int rc; | |
f70dba83 | 1043 | CommandList_struct *c; |
1da177e4 LT |
1044 | unsigned char cdb[12]; |
1045 | unsigned char scsi3addr[8]; | |
1046 | ErrorInfo_struct *ei; | |
1047 | unsigned long flags; | |
1048 | ||
f70dba83 SC |
1049 | spin_lock_irqsave(&h->lock, flags); |
1050 | c = scsi_cmd_alloc(h); | |
1051 | spin_unlock_irqrestore(&h->lock, flags); | |
1052 | if (c == NULL) { /* trouble... */ | |
1da177e4 LT |
1053 | printk("cmd_alloc returned NULL!\n"); |
1054 | return -1; | |
1055 | } | |
1056 | ||
1057 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
1058 | cdb[0] = CISS_REPORT_PHYS; | |
1059 | cdb[1] = 0; | |
1060 | cdb[2] = 0; | |
1061 | cdb[3] = 0; | |
1062 | cdb[4] = 0; | |
1063 | cdb[5] = 0; | |
1064 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
1065 | cdb[7] = (bufsize >> 16) & 0xFF; | |
1066 | cdb[8] = (bufsize >> 8) & 0xFF; | |
1067 | cdb[9] = bufsize & 0xFF; | |
1068 | cdb[10] = 0; | |
1069 | cdb[11] = 0; | |
1070 | ||
f70dba83 | 1071 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, |
1da177e4 LT |
1072 | cdb, 12, |
1073 | (unsigned char *) buf, | |
1074 | bufsize, XFER_READ); | |
1075 | ||
1076 | if (rc != 0) return rc; /* something went wrong */ | |
1077 | ||
f70dba83 | 1078 | ei = c->err_info; |
1da177e4 LT |
1079 | if (ei->CommandStatus != 0 && |
1080 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1081 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1082 | rc = -1; |
1083 | } | |
f70dba83 SC |
1084 | spin_lock_irqsave(&h->lock, flags); |
1085 | scsi_cmd_free(h, c); | |
1086 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1087 | return rc; |
1088 | } | |
1089 | ||
1090 | static void | |
f70dba83 | 1091 | cciss_update_non_disk_devices(ctlr_info_t *h, int hostno) |
1da177e4 LT |
1092 | { |
1093 | /* the idea here is we could get notified from /proc | |
1094 | that some devices have changed, so we do a report | |
1095 | physical luns cmd, and adjust our list of devices | |
1096 | accordingly. (We can't rely on the scsi-mid layer just | |
1097 | doing inquiries, because the "busses" that the scsi | |
1098 | mid-layer probes are totally fabricated by this driver, | |
1099 | so new devices wouldn't show up. | |
1100 | ||
1101 | the scsi3addr's of devices won't change so long as the | |
1102 | adapter is not reset. That means we can rescan and | |
1103 | tell which devices we already know about, vs. new | |
1104 | devices, vs. disappearing devices. | |
1105 | ||
1106 | Also, if you yank out a tape drive, then put in a disk | |
1107 | in it's place, (say, a configured volume from another | |
1108 | array controller for instance) _don't_ poke this driver | |
1109 | (so it thinks it's still a tape, but _do_ poke the scsi | |
1110 | mid layer, so it does an inquiry... the scsi mid layer | |
1111 | will see the physical disk. This would be bad. Need to | |
1112 | think about how to prevent that. One idea would be to | |
1113 | snoop all scsi responses and if an inquiry repsonse comes | |
1114 | back that reports a disk, chuck it an return selection | |
1115 | timeout instead and adjust our table... Not sure i like | |
1116 | that though. | |
1117 | ||
1118 | */ | |
47922d06 MM |
1119 | #define OBDR_TAPE_INQ_SIZE 49 |
1120 | #define OBDR_TAPE_SIG "$DR-10" | |
1da177e4 | 1121 | ReportLunData_struct *ld_buff; |
47922d06 | 1122 | unsigned char *inq_buff; |
1da177e4 | 1123 | unsigned char scsi3addr[8]; |
1da177e4 LT |
1124 | __u32 num_luns=0; |
1125 | unsigned char *ch; | |
905bd78f | 1126 | struct cciss_scsi_dev_t *currentsd, *this_device; |
1da177e4 LT |
1127 | int ncurrent=0; |
1128 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1129 | int i; | |
1130 | ||
06ff37ff | 1131 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
47922d06 | 1132 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
905bd78f | 1133 | currentsd = kzalloc(sizeof(*currentsd) * |
1134 | (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); | |
1135 | if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { | |
1136 | printk(KERN_ERR "cciss: out of memory\n"); | |
1137 | goto out; | |
1da177e4 | 1138 | } |
905bd78f | 1139 | this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
f70dba83 | 1140 | if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) { |
1da177e4 LT |
1141 | ch = &ld_buff->LUNListLength[0]; |
1142 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1143 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1144 | printk(KERN_WARNING | |
1145 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1146 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1147 | num_luns - CISS_MAX_PHYS_LUN); | |
1148 | num_luns = CISS_MAX_PHYS_LUN; | |
1149 | } | |
1150 | } | |
1151 | else { | |
1152 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1153 | goto out; | |
1154 | } | |
1155 | ||
1156 | ||
1157 | /* adjust our table of devices */ | |
905bd78f | 1158 | for (i = 0; i < num_luns; i++) { |
1da177e4 LT |
1159 | /* for each physical lun, do an inquiry */ |
1160 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
47922d06 | 1161 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
1da177e4 LT |
1162 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
1163 | ||
f70dba83 | 1164 | if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, |
905bd78f | 1165 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) |
1da177e4 | 1166 | /* Inquiry failed (msg printed already) */ |
905bd78f | 1167 | continue; /* so we will skip this device. */ |
1168 | ||
1169 | this_device->devtype = (inq_buff[0] & 0x1f); | |
1170 | this_device->bus = -1; | |
1171 | this_device->target = -1; | |
1172 | this_device->lun = -1; | |
1173 | memcpy(this_device->scsi3addr, scsi3addr, 8); | |
1174 | memcpy(this_device->vendor, &inq_buff[8], | |
1175 | sizeof(this_device->vendor)); | |
1176 | memcpy(this_device->model, &inq_buff[16], | |
1177 | sizeof(this_device->model)); | |
1178 | memcpy(this_device->revision, &inq_buff[32], | |
1179 | sizeof(this_device->revision)); | |
1180 | memset(this_device->device_id, 0, | |
1181 | sizeof(this_device->device_id)); | |
f70dba83 | 1182 | cciss_scsi_get_device_id(h, scsi3addr, |
905bd78f | 1183 | this_device->device_id, sizeof(this_device->device_id)); |
1184 | ||
1185 | switch (this_device->devtype) | |
1da177e4 | 1186 | { |
47922d06 MM |
1187 | case 0x05: /* CD-ROM */ { |
1188 | ||
1189 | /* We don't *really* support actual CD-ROM devices, | |
1190 | * just this "One Button Disaster Recovery" tape drive | |
1191 | * which temporarily pretends to be a CD-ROM drive. | |
1192 | * So we check that the device is really an OBDR tape | |
1193 | * device by checking for "$DR-10" in bytes 43-48 of | |
1194 | * the inquiry data. | |
1195 | */ | |
1196 | char obdr_sig[7]; | |
1197 | ||
1198 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1199 | obdr_sig[6] = '\0'; | |
1200 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1201 | /* Not OBDR device, ignore it. */ | |
1202 | break; | |
1203 | } | |
1204 | /* fall through . . . */ | |
1da177e4 LT |
1205 | case 0x01: /* sequential access, (tape) */ |
1206 | case 0x08: /* medium changer */ | |
1207 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1208 | printk(KERN_INFO "cciss%d: %s ignored, " | |
f70dba83 | 1209 | "too many devices.\n", h->ctlr, |
905bd78f | 1210 | scsi_device_type(this_device->devtype)); |
1da177e4 LT |
1211 | break; |
1212 | } | |
905bd78f | 1213 | currentsd[ncurrent] = *this_device; |
1da177e4 LT |
1214 | ncurrent++; |
1215 | break; | |
1216 | default: | |
1217 | break; | |
1218 | } | |
1219 | } | |
1220 | ||
f70dba83 | 1221 | adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent); |
1da177e4 LT |
1222 | out: |
1223 | kfree(inq_buff); | |
1224 | kfree(ld_buff); | |
905bd78f | 1225 | kfree(currentsd); |
1da177e4 LT |
1226 | return; |
1227 | } | |
1228 | ||
1229 | static int | |
1230 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1231 | { | |
1232 | int verb_len = strlen(verb); | |
1233 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1234 | return verb_len; | |
1235 | else | |
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | static int | |
f70dba83 | 1240 | cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length) |
1da177e4 LT |
1241 | { |
1242 | int arg_len; | |
1243 | ||
1244 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
f70dba83 | 1245 | cciss_update_non_disk_devices(h, hostno); |
1da177e4 LT |
1246 | else |
1247 | return -EINVAL; | |
1248 | return length; | |
1249 | } | |
1250 | ||
1da177e4 | 1251 | static int |
e88b7bb0 | 1252 | cciss_scsi_write_info(struct Scsi_Host *sh, |
1da177e4 | 1253 | char *buffer, /* data buffer */ |
e88b7bb0 | 1254 | int length) /* length of data in buffer */ |
1da177e4 | 1255 | { |
e88b7bb0 AV |
1256 | ctlr_info_t *h = (ctlr_info_t *) sh->hostdata[0]; |
1257 | if (h == NULL) /* This really shouldn't ever happen. */ | |
1258 | return -EINVAL; | |
1da177e4 | 1259 | |
e88b7bb0 AV |
1260 | return cciss_scsi_user_command(h, sh->host_no, |
1261 | buffer, length); | |
1262 | } | |
1263 | ||
1264 | static int | |
1265 | cciss_scsi_show_info(struct seq_file *m, struct Scsi_Host *sh) | |
1266 | { | |
1267 | ||
1268 | ctlr_info_t *h = (ctlr_info_t *) sh->hostdata[0]; | |
b9f0bd08 | 1269 | int i; |
1da177e4 | 1270 | |
f70dba83 | 1271 | if (h == NULL) /* This really shouldn't ever happen. */ |
1da177e4 LT |
1272 | return -EINVAL; |
1273 | ||
e88b7bb0 AV |
1274 | seq_printf(m, "cciss%d: SCSI host: %d\n", |
1275 | h->ctlr, sh->host_no); | |
1276 | ||
1277 | /* this information is needed by apps to know which cciss | |
1278 | device corresponds to which scsi host number without | |
1279 | having to open a scsi target device node. The device | |
1280 | information is not a duplicate of /proc/scsi/scsi because | |
1281 | the two may be out of sync due to scsi hotplug, rather | |
1282 | this info is for an app to be able to use to know how to | |
1283 | get them back in sync. */ | |
1284 | ||
1285 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
1286 | struct cciss_scsi_dev_t *sd = | |
1287 | &ccissscsi[h->ctlr].dev[i]; | |
1288 | seq_printf(m, "c%db%dt%dl%d %02d " | |
1289 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1290 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1291 | sd->devtype, | |
1292 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1293 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1294 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1295 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1296 | } | |
1297 | return 0; | |
1298 | } | |
1da177e4 LT |
1299 | |
1300 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1301 | dma mapping and fills in the scatter gather entries of the | |
f70dba83 | 1302 | cciss command, c. */ |
1da177e4 | 1303 | |
f70dba83 | 1304 | static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c, |
87c3a922 | 1305 | struct scsi_cmnd *cmd) |
1da177e4 | 1306 | { |
41ce639a FT |
1307 | unsigned int len; |
1308 | struct scatterlist *sg; | |
1da177e4 | 1309 | __u64 addr64; |
87c3a922 SC |
1310 | int request_nsgs, i, chained, sg_index; |
1311 | struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr; | |
1312 | SGDescriptor_struct *curr_sg; | |
1313 | ||
1314 | BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); | |
1315 | ||
1316 | chained = 0; | |
1317 | sg_index = 0; | |
f70dba83 | 1318 | curr_sg = c->SG; |
87c3a922 SC |
1319 | request_nsgs = scsi_dma_map(cmd); |
1320 | if (request_nsgs) { | |
1321 | scsi_for_each_sg(cmd, sg, request_nsgs, i) { | |
1322 | if (sg_index + 1 == h->max_cmd_sgentries && | |
1323 | !chained && request_nsgs - i > 1) { | |
1324 | chained = 1; | |
1325 | sg_index = 0; | |
f70dba83 | 1326 | curr_sg = sa->cmd_sg_list[c->cmdindex]; |
87c3a922 | 1327 | } |
41ce639a FT |
1328 | addr64 = (__u64) sg_dma_address(sg); |
1329 | len = sg_dma_len(sg); | |
87c3a922 SC |
1330 | curr_sg[sg_index].Addr.lower = |
1331 | (__u32) (addr64 & 0x0FFFFFFFFULL); | |
1332 | curr_sg[sg_index].Addr.upper = | |
1333 | (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); | |
1334 | curr_sg[sg_index].Len = len; | |
1335 | curr_sg[sg_index].Ext = 0; | |
1336 | ++sg_index; | |
1da177e4 | 1337 | } |
87c3a922 | 1338 | if (chained) |
f70dba83 SC |
1339 | cciss_map_sg_chain_block(h, c, |
1340 | sa->cmd_sg_list[c->cmdindex], | |
87c3a922 SC |
1341 | (request_nsgs - (h->max_cmd_sgentries - 1)) * |
1342 | sizeof(SGDescriptor_struct)); | |
41ce639a | 1343 | } |
87c3a922 SC |
1344 | /* track how many SG entries we are using */ |
1345 | if (request_nsgs > h->maxSG) | |
1346 | h->maxSG = request_nsgs; | |
bc67f636 | 1347 | c->Header.SGTotal = (u16) request_nsgs + chained; |
87c3a922 | 1348 | if (request_nsgs > h->max_cmd_sgentries) |
f70dba83 | 1349 | c->Header.SGList = h->max_cmd_sgentries; |
87c3a922 | 1350 | else |
f70dba83 | 1351 | c->Header.SGList = c->Header.SGTotal; |
1da177e4 LT |
1352 | return; |
1353 | } | |
1354 | ||
1355 | ||
1356 | static int | |
f281233d | 1357 | cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
1da177e4 | 1358 | { |
f70dba83 SC |
1359 | ctlr_info_t *h; |
1360 | int rc; | |
1da177e4 | 1361 | unsigned char scsi3addr[8]; |
f70dba83 | 1362 | CommandList_struct *c; |
1da177e4 LT |
1363 | unsigned long flags; |
1364 | ||
1365 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1366 | // We violate cmd->host privacy here. (Is there another way?) | |
f70dba83 | 1367 | h = (ctlr_info_t *) cmd->device->host->hostdata[0]; |
1da177e4 | 1368 | |
f70dba83 | 1369 | rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id, |
1da177e4 LT |
1370 | cmd->device->lun, scsi3addr); |
1371 | if (rc != 0) { | |
1372 | /* the scsi nexus does not match any that we presented... */ | |
1373 | /* pretend to mid layer that we got selection timeout */ | |
1374 | cmd->result = DID_NO_CONNECT << 16; | |
1375 | done(cmd); | |
1376 | /* we might want to think about registering controller itself | |
1377 | as a processor device on the bus so sg binds to it. */ | |
1378 | return 0; | |
1379 | } | |
1380 | ||
1da177e4 LT |
1381 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and |
1382 | see what the device thinks of it. */ | |
1383 | ||
f70dba83 SC |
1384 | spin_lock_irqsave(&h->lock, flags); |
1385 | c = scsi_cmd_alloc(h); | |
1386 | spin_unlock_irqrestore(&h->lock, flags); | |
1387 | if (c == NULL) { /* trouble... */ | |
b2a4a43d | 1388 | dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n"); |
1da177e4 LT |
1389 | /* FIXME: next 3 lines are -> BAD! <- */ |
1390 | cmd->result = DID_NO_CONNECT << 16; | |
1391 | done(cmd); | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | // Fill in the command list header | |
1396 | ||
1397 | cmd->scsi_done = done; // save this for use by completion code | |
1398 | ||
f70dba83 SC |
1399 | /* save c in case we have to abort it */ |
1400 | cmd->host_scribble = (unsigned char *) c; | |
1da177e4 | 1401 | |
f70dba83 SC |
1402 | c->cmd_type = CMD_SCSI; |
1403 | c->scsi_cmd = cmd; | |
1404 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
1405 | memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1406 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
1407 | |
1408 | // Fill in the request block... | |
1409 | ||
f70dba83 SC |
1410 | c->Request.Timeout = 0; |
1411 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); | |
1412 | BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); | |
1413 | c->Request.CDBLen = cmd->cmd_len; | |
1414 | memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1415 | c->Request.Type.Type = TYPE_CMD; | |
1416 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
1da177e4 LT |
1417 | switch(cmd->sc_data_direction) |
1418 | { | |
f70dba83 SC |
1419 | case DMA_TO_DEVICE: |
1420 | c->Request.Type.Direction = XFER_WRITE; | |
1421 | break; | |
1422 | case DMA_FROM_DEVICE: | |
1423 | c->Request.Type.Direction = XFER_READ; | |
1424 | break; | |
1425 | case DMA_NONE: | |
1426 | c->Request.Type.Direction = XFER_NONE; | |
1427 | break; | |
1da177e4 LT |
1428 | case DMA_BIDIRECTIONAL: |
1429 | // This can happen if a buggy application does a scsi passthru | |
1430 | // and sets both inlen and outlen to non-zero. ( see | |
1431 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1432 | ||
f70dba83 | 1433 | c->Request.Type.Direction = XFER_RSVD; |
1da177e4 LT |
1434 | // This is technically wrong, and cciss controllers should |
1435 | // reject it with CMD_INVALID, which is the most correct | |
1436 | // response, but non-fibre backends appear to let it | |
1437 | // slide by, and give the same results as if this field | |
1438 | // were set correctly. Either way is acceptable for | |
1439 | // our purposes here. | |
1440 | ||
1441 | break; | |
1442 | ||
1443 | default: | |
b2a4a43d | 1444 | dev_warn(&h->pdev->dev, "unknown data direction: %d\n", |
1da177e4 LT |
1445 | cmd->sc_data_direction); |
1446 | BUG(); | |
1447 | break; | |
1448 | } | |
f70dba83 SC |
1449 | cciss_scatter_gather(h, c, cmd); |
1450 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
1451 | /* the cmd'll come back via intr handler in complete_scsi_command() */ |
1452 | return 0; | |
1453 | } | |
1454 | ||
f281233d JG |
1455 | static DEF_SCSI_QCMD(cciss_scsi_queue_command) |
1456 | ||
f70dba83 | 1457 | static void cciss_unregister_scsi(ctlr_info_t *h) |
1da177e4 LT |
1458 | { |
1459 | struct cciss_scsi_adapter_data_t *sa; | |
1460 | struct cciss_scsi_cmd_stack_t *stk; | |
1461 | unsigned long flags; | |
1462 | ||
1463 | /* we are being forcibly unloaded, and may not refuse. */ | |
1464 | ||
f70dba83 SC |
1465 | spin_lock_irqsave(&h->lock, flags); |
1466 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1467 | stk = &sa->cmd_stack; |
1468 | ||
1469 | /* if we weren't ever actually registered, don't unregister */ | |
1470 | if (sa->registered) { | |
f70dba83 | 1471 | spin_unlock_irqrestore(&h->lock, flags); |
1da177e4 LT |
1472 | scsi_remove_host(sa->scsi_host); |
1473 | scsi_host_put(sa->scsi_host); | |
f70dba83 | 1474 | spin_lock_irqsave(&h->lock, flags); |
1da177e4 LT |
1475 | } |
1476 | ||
1477 | /* set scsi_host to NULL so our detect routine will | |
1478 | find us on register */ | |
1479 | sa->scsi_host = NULL; | |
f70dba83 SC |
1480 | spin_unlock_irqrestore(&h->lock, flags); |
1481 | scsi_cmd_stack_free(h); | |
1da177e4 | 1482 | kfree(sa); |
1da177e4 LT |
1483 | } |
1484 | ||
f70dba83 | 1485 | static int cciss_engage_scsi(ctlr_info_t *h) |
1da177e4 LT |
1486 | { |
1487 | struct cciss_scsi_adapter_data_t *sa; | |
1488 | struct cciss_scsi_cmd_stack_t *stk; | |
1489 | unsigned long flags; | |
1490 | ||
f70dba83 SC |
1491 | spin_lock_irqsave(&h->lock, flags); |
1492 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1493 | stk = &sa->cmd_stack; |
1494 | ||
f4a93bcd | 1495 | if (sa->registered) { |
b2a4a43d | 1496 | dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n"); |
f70dba83 | 1497 | spin_unlock_irqrestore(&h->lock, flags); |
8721c81f | 1498 | return -ENXIO; |
1da177e4 | 1499 | } |
f4a93bcd | 1500 | sa->registered = 1; |
f70dba83 SC |
1501 | spin_unlock_irqrestore(&h->lock, flags); |
1502 | cciss_update_non_disk_devices(h, -1); | |
1503 | cciss_scsi_detect(h); | |
1da177e4 LT |
1504 | return 0; |
1505 | } | |
1506 | ||
1507 | static void | |
f70dba83 | 1508 | cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h) |
1da177e4 LT |
1509 | { |
1510 | unsigned long flags; | |
1da177e4 | 1511 | |
f70dba83 | 1512 | CPQ_TAPE_LOCK(h, flags); |
89b6e743 | 1513 | seq_printf(seq, |
b9f0bd08 | 1514 | "Sequential access devices: %d\n\n", |
f70dba83 SC |
1515 | ccissscsi[h->ctlr].ndevices); |
1516 | CPQ_TAPE_UNLOCK(h, flags); | |
1da177e4 LT |
1517 | } |
1518 | ||
88f627ae SC |
1519 | static int wait_for_device_to_become_ready(ctlr_info_t *h, |
1520 | unsigned char lunaddr[]) | |
1521 | { | |
1522 | int rc; | |
1523 | int count = 0; | |
1524 | int waittime = HZ; | |
1525 | CommandList_struct *c; | |
1526 | ||
6b4d96b8 | 1527 | c = cmd_alloc(h); |
88f627ae | 1528 | if (!c) { |
b2a4a43d SC |
1529 | dev_warn(&h->pdev->dev, "out of memory in " |
1530 | "wait_for_device_to_become_ready.\n"); | |
88f627ae SC |
1531 | return IO_ERROR; |
1532 | } | |
1533 | ||
1534 | /* Send test unit ready until device ready, or give up. */ | |
1535 | while (count < 20) { | |
1536 | ||
1537 | /* Wait for a bit. do this first, because if we send | |
1538 | * the TUR right away, the reset will just abort it. | |
1539 | */ | |
40df6ae4 | 1540 | schedule_timeout_uninterruptible(waittime); |
88f627ae SC |
1541 | count++; |
1542 | ||
1543 | /* Increase wait time with each try, up to a point. */ | |
1544 | if (waittime < (HZ * 30)) | |
1545 | waittime = waittime * 2; | |
1546 | ||
1547 | /* Send the Test Unit Ready */ | |
f70dba83 | 1548 | rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0, |
88f627ae | 1549 | lunaddr, TYPE_CMD); |
85cc61ae | 1550 | if (rc == 0) |
1551 | rc = sendcmd_withirq_core(h, c, 0); | |
1552 | ||
1553 | (void) process_sendcmd_error(h, c); | |
88f627ae | 1554 | |
3969251b | 1555 | if (rc != 0) |
1556 | goto retry_tur; | |
88f627ae | 1557 | |
3969251b | 1558 | if (c->err_info->CommandStatus == CMD_SUCCESS) |
88f627ae SC |
1559 | break; |
1560 | ||
3969251b | 1561 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && |
1562 | c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { | |
1563 | if (c->err_info->SenseInfo[2] == NO_SENSE) | |
1564 | break; | |
1565 | if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { | |
1566 | unsigned char asc; | |
1567 | asc = c->err_info->SenseInfo[12]; | |
1568 | check_for_unit_attention(h, c); | |
1569 | if (asc == POWER_OR_RESET) | |
1570 | break; | |
1571 | } | |
1572 | } | |
1573 | retry_tur: | |
b2a4a43d | 1574 | dev_warn(&h->pdev->dev, "Waiting %d secs " |
88f627ae | 1575 | "for device to become ready.\n", |
b2a4a43d | 1576 | waittime / HZ); |
88f627ae SC |
1577 | rc = 1; /* device not ready. */ |
1578 | } | |
1579 | ||
1580 | if (rc) | |
b2a4a43d | 1581 | dev_warn(&h->pdev->dev, "giving up on device.\n"); |
88f627ae | 1582 | else |
b2a4a43d | 1583 | dev_warn(&h->pdev->dev, "device is ready.\n"); |
88f627ae | 1584 | |
6b4d96b8 | 1585 | cmd_free(h, c); |
88f627ae SC |
1586 | return rc; |
1587 | } | |
89b6e743 | 1588 | |
3da8b713 | 1589 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
1590 | * complaining. Doing a host- or bus-reset can't do anything good here. | |
1591 | * Despite what it might say in scsi_error.c, there may well be commands | |
1592 | * on the controller, as the cciss driver registers twice, once as a block | |
1593 | * device for the logical drives, and once as a scsi device, for any tape | |
1594 | * drives. So we know there are no commands out on the tape drives, but we | |
1595 | * don't know there are no commands on the controller, and it is likely | |
1596 | * that there probably are, as the cciss block device is most commonly used | |
1597 | * as a boot device (embedded controller on HP/Compaq systems.) | |
1598 | */ | |
1599 | ||
1600 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) | |
1601 | { | |
1602 | int rc; | |
1603 | CommandList_struct *cmd_in_trouble; | |
88f627ae | 1604 | unsigned char lunaddr[8]; |
f70dba83 | 1605 | ctlr_info_t *h; |
3da8b713 | 1606 | |
1607 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1608 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1609 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1610 | return FAILED; |
b2a4a43d | 1611 | dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n"); |
3da8b713 | 1612 | /* find the command that's giving us trouble */ |
1613 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; | |
88f627ae | 1614 | if (cmd_in_trouble == NULL) /* paranoia */ |
3da8b713 | 1615 | return FAILED; |
88f627ae | 1616 | memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); |
3da8b713 | 1617 | /* send a reset to the SCSI LUN which the command was sent to */ |
f70dba83 | 1618 | rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr, |
3da8b713 | 1619 | TYPE_MSG); |
f70dba83 | 1620 | if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0) |
3da8b713 | 1621 | return SUCCESS; |
b2a4a43d | 1622 | dev_warn(&h->pdev->dev, "resetting device failed.\n"); |
3da8b713 | 1623 | return FAILED; |
1624 | } | |
1625 | ||
1626 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) | |
1627 | { | |
1628 | int rc; | |
1629 | CommandList_struct *cmd_to_abort; | |
85cc61ae | 1630 | unsigned char lunaddr[8]; |
f70dba83 | 1631 | ctlr_info_t *h; |
3da8b713 | 1632 | |
1633 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1634 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1635 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1636 | return FAILED; |
b2a4a43d | 1637 | dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n"); |
3da8b713 | 1638 | |
1639 | /* find the command to be aborted */ | |
1640 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; | |
1641 | if (cmd_to_abort == NULL) /* paranoia */ | |
1642 | return FAILED; | |
85cc61ae | 1643 | memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); |
f70dba83 | 1644 | rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag, |
85cc61ae | 1645 | 0, 0, lunaddr, TYPE_MSG); |
3da8b713 | 1646 | if (rc == 0) |
1647 | return SUCCESS; | |
1648 | return FAILED; | |
1649 | ||
1650 | } | |
1651 | ||
1da177e4 LT |
1652 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
1653 | ||
1654 | /* If no tape support, then these become defined out of existence */ | |
1655 | ||
1656 | #define cciss_scsi_setup(cntl_num) | |
0007a4c9 | 1657 | #define cciss_engage_scsi(h) |
1da177e4 LT |
1658 | |
1659 | #endif /* CONFIG_CISS_SCSI_TAPE */ |