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1da177e4 | 1 | /* |
bd4f36d6 MM |
2 | * Disk Array driver for HP Smart Array controllers, SCSI Tape module. |
3 | * (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P. | |
1da177e4 LT |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
bd4f36d6 | 7 | * the Free Software Foundation; version 2 of the License. |
1da177e4 LT |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
bd4f36d6 MM |
11 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * General Public License for more details. | |
1da177e4 LT |
13 | * |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
bd4f36d6 MM |
16 | * Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA |
17 | * 02111-1307, USA. | |
1da177e4 LT |
18 | * |
19 | * Questions/Comments/Bugfixes to iss_storagedev@hp.com | |
20 | * | |
21 | * Author: Stephen M. Cameron | |
22 | */ | |
23 | #ifdef CONFIG_CISS_SCSI_TAPE | |
24 | ||
25 | /* Here we have code to present the driver as a scsi driver | |
26 | as it is simultaneously presented as a block driver. The | |
27 | reason for doing this is to allow access to SCSI tape drives | |
28 | through the array controller. Note in particular, neither | |
29 | physical nor logical disks are presented through the scsi layer. */ | |
30 | ||
4e57b681 TS |
31 | #include <linux/timer.h> |
32 | #include <linux/completion.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/string.h> | |
35 | ||
36 | #include <asm/atomic.h> | |
37 | ||
1da177e4 LT |
38 | #include <scsi/scsi_cmnd.h> |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_host.h> | |
1da177e4 LT |
41 | |
42 | #include "cciss_scsi.h" | |
43 | ||
3da8b713 | 44 | #define CCISS_ABORT_MSG 0x00 |
45 | #define CCISS_RESET_MSG 0x01 | |
46 | ||
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 LT |
56 | |
57 | static int cciss_scsi_proc_info( | |
58 | struct Scsi_Host *sh, | |
59 | char *buffer, /* data buffer */ | |
60 | char **start, /* where data in buffer starts */ | |
61 | off_t offset, /* offset from start of imaginary file */ | |
62 | int length, /* length of data in buffer */ | |
63 | int func); /* 0 == read, 1 == write */ | |
64 | ||
f281233d JG |
65 | static int cciss_scsi_queue_command (struct Scsi_Host *h, |
66 | struct scsi_cmnd *cmd); | |
3da8b713 | 67 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *); |
68 | static int cciss_eh_abort_handler(struct scsi_cmnd *); | |
1da177e4 LT |
69 | |
70 | static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { | |
71 | { .name = "cciss0", .ndevices = 0 }, | |
72 | { .name = "cciss1", .ndevices = 0 }, | |
73 | { .name = "cciss2", .ndevices = 0 }, | |
74 | { .name = "cciss3", .ndevices = 0 }, | |
75 | { .name = "cciss4", .ndevices = 0 }, | |
76 | { .name = "cciss5", .ndevices = 0 }, | |
77 | { .name = "cciss6", .ndevices = 0 }, | |
78 | { .name = "cciss7", .ndevices = 0 }, | |
79 | }; | |
80 | ||
81 | static struct scsi_host_template cciss_driver_template = { | |
82 | .module = THIS_MODULE, | |
83 | .name = "cciss", | |
84 | .proc_name = "cciss", | |
85 | .proc_info = cciss_scsi_proc_info, | |
86 | .queuecommand = cciss_scsi_queue_command, | |
87 | .can_queue = SCSI_CCISS_CAN_QUEUE, | |
88 | .this_id = 7, | |
1da177e4 LT |
89 | .cmd_per_lun = 1, |
90 | .use_clustering = DISABLE_CLUSTERING, | |
3da8b713 | 91 | /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ |
92 | .eh_device_reset_handler= cciss_eh_device_reset_handler, | |
93 | .eh_abort_handler = cciss_eh_abort_handler, | |
1da177e4 LT |
94 | }; |
95 | ||
96 | #pragma pack(1) | |
1b7d0d28 | 97 | |
5e216153 MM |
98 | #define SCSI_PAD_32 8 |
99 | #define SCSI_PAD_64 8 | |
1b7d0d28 | 100 | |
1da177e4 LT |
101 | struct cciss_scsi_cmd_stack_elem_t { |
102 | CommandList_struct cmd; | |
103 | ErrorInfo_struct Err; | |
104 | __u32 busaddr; | |
87c3a922 | 105 | int cmdindex; |
1b7d0d28 | 106 | u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64]; |
1da177e4 LT |
107 | }; |
108 | ||
109 | #pragma pack() | |
110 | ||
111 | #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \ | |
112 | CCISS_MAX_SCSI_DEVS_PER_HBA + 2) | |
113 | // plus two for init time usage | |
114 | ||
115 | #pragma pack(1) | |
116 | struct cciss_scsi_cmd_stack_t { | |
117 | struct cciss_scsi_cmd_stack_elem_t *pool; | |
118 | struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE]; | |
119 | dma_addr_t cmd_pool_handle; | |
120 | int top; | |
121 | }; | |
122 | #pragma pack() | |
123 | ||
124 | struct cciss_scsi_adapter_data_t { | |
125 | struct Scsi_Host *scsi_host; | |
126 | struct cciss_scsi_cmd_stack_t cmd_stack; | |
87c3a922 | 127 | SGDescriptor_struct **cmd_sg_list; |
1da177e4 LT |
128 | int registered; |
129 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
130 | }; | |
131 | ||
f70dba83 SC |
132 | #define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \ |
133 | &h->scsi_ctlr->lock, flags); | |
134 | #define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \ | |
135 | &h->scsi_ctlr->lock, flags); | |
1da177e4 LT |
136 | |
137 | static CommandList_struct * | |
138 | scsi_cmd_alloc(ctlr_info_t *h) | |
139 | { | |
140 | /* assume only one process in here at a time, locking done by caller. */ | |
f70dba83 | 141 | /* use h->lock */ |
1da177e4 LT |
142 | /* might be better to rewrite how we allocate scsi commands in a way that */ |
143 | /* needs no locking at all. */ | |
144 | ||
145 | /* take the top memory chunk off the stack and return it, if any. */ | |
146 | struct cciss_scsi_cmd_stack_elem_t *c; | |
147 | struct cciss_scsi_adapter_data_t *sa; | |
148 | struct cciss_scsi_cmd_stack_t *stk; | |
149 | u64bit temp64; | |
150 | ||
aad9fb6f | 151 | sa = h->scsi_ctlr; |
1da177e4 LT |
152 | stk = &sa->cmd_stack; |
153 | ||
154 | if (stk->top < 0) | |
155 | return NULL; | |
156 | c = stk->elem[stk->top]; | |
157 | /* memset(c, 0, sizeof(*c)); */ | |
158 | memset(&c->cmd, 0, sizeof(c->cmd)); | |
159 | memset(&c->Err, 0, sizeof(c->Err)); | |
160 | /* set physical addr of cmd and addr of scsi parameters */ | |
161 | c->cmd.busaddr = c->busaddr; | |
87c3a922 | 162 | c->cmd.cmdindex = c->cmdindex; |
1da177e4 LT |
163 | /* (__u32) (stk->cmd_pool_handle + |
164 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ | |
165 | ||
166 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); | |
167 | /* (__u64) (stk->cmd_pool_handle + | |
168 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + | |
169 | sizeof(CommandList_struct)); */ | |
170 | stk->top--; | |
171 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; | |
172 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; | |
173 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); | |
174 | ||
175 | c->cmd.ctlr = h->ctlr; | |
176 | c->cmd.err_info = &c->Err; | |
177 | ||
178 | return (CommandList_struct *) c; | |
179 | } | |
180 | ||
181 | static void | |
f70dba83 | 182 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
183 | { |
184 | /* assume only one process in here at a time, locking done by caller. */ | |
f70dba83 | 185 | /* use h->lock */ |
1da177e4 LT |
186 | /* drop the free memory chunk on top of the stack. */ |
187 | ||
188 | struct cciss_scsi_adapter_data_t *sa; | |
189 | struct cciss_scsi_cmd_stack_t *stk; | |
190 | ||
aad9fb6f | 191 | sa = h->scsi_ctlr; |
1da177e4 | 192 | stk = &sa->cmd_stack; |
713b6864 | 193 | stk->top++; |
1da177e4 | 194 | if (stk->top >= CMD_STACK_SIZE) { |
b2a4a43d SC |
195 | dev_err(&h->pdev->dev, |
196 | "scsi_cmd_free called too many times.\n"); | |
1da177e4 LT |
197 | BUG(); |
198 | } | |
f70dba83 | 199 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c; |
1da177e4 LT |
200 | } |
201 | ||
202 | static int | |
f70dba83 | 203 | scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa) |
1da177e4 LT |
204 | { |
205 | int i; | |
206 | struct cciss_scsi_cmd_stack_t *stk; | |
207 | size_t size; | |
208 | ||
f70dba83 SC |
209 | sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, |
210 | h->chainsize, CMD_STACK_SIZE); | |
211 | if (!sa->cmd_sg_list && h->chainsize > 0) | |
87c3a922 SC |
212 | return -ENOMEM; |
213 | ||
1da177e4 LT |
214 | stk = &sa->cmd_stack; |
215 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
216 | ||
1b7d0d28 SC |
217 | /* Check alignment, see cciss_cmd.h near CommandList_struct def. */ |
218 | BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0); | |
219 | /* pci_alloc_consistent guarantees 32-bit DMA address will be used */ | |
1da177e4 | 220 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) |
f70dba83 | 221 | pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle); |
1da177e4 LT |
222 | |
223 | if (stk->pool == NULL) { | |
87c3a922 SC |
224 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE); |
225 | sa->cmd_sg_list = NULL; | |
226 | return -ENOMEM; | |
1da177e4 LT |
227 | } |
228 | ||
978eb516 SC |
229 | stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL); |
230 | if (!stk->elem) { | |
231 | pci_free_consistent(h->pdev, size, stk->pool, | |
232 | stk->cmd_pool_handle); | |
233 | return -1; | |
234 | } | |
235 | ||
1da177e4 LT |
236 | for (i=0; i<CMD_STACK_SIZE; i++) { |
237 | stk->elem[i] = &stk->pool[i]; | |
238 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
239 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
87c3a922 | 240 | stk->elem[i]->cmdindex = i; |
1da177e4 LT |
241 | } |
242 | stk->top = CMD_STACK_SIZE-1; | |
243 | return 0; | |
244 | } | |
245 | ||
246 | static void | |
f70dba83 | 247 | scsi_cmd_stack_free(ctlr_info_t *h) |
1da177e4 LT |
248 | { |
249 | struct cciss_scsi_adapter_data_t *sa; | |
250 | struct cciss_scsi_cmd_stack_t *stk; | |
251 | size_t size; | |
252 | ||
f70dba83 | 253 | sa = h->scsi_ctlr; |
1da177e4 LT |
254 | stk = &sa->cmd_stack; |
255 | if (stk->top != CMD_STACK_SIZE-1) { | |
b2a4a43d SC |
256 | dev_warn(&h->pdev->dev, |
257 | "bug: %d scsi commands are still outstanding.\n", | |
1da177e4 | 258 | CMD_STACK_SIZE - stk->top); |
1da177e4 LT |
259 | } |
260 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
261 | ||
f70dba83 | 262 | pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle); |
1da177e4 | 263 | stk->pool = NULL; |
87c3a922 | 264 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE); |
978eb516 SC |
265 | kfree(stk->elem); |
266 | stk->elem = NULL; | |
1da177e4 LT |
267 | } |
268 | ||
400bb236 | 269 | #if 0 |
1da177e4 LT |
270 | static int xmargin=8; |
271 | static int amargin=60; | |
272 | ||
273 | static void | |
274 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
275 | { | |
276 | ||
277 | int i; | |
278 | unsigned char *x; | |
279 | ||
280 | if (hex) | |
281 | { | |
282 | x = c; | |
283 | for (i=0;i<len;i++) | |
284 | { | |
285 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
286 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
287 | printk(" %02x", *x); | |
288 | x++; | |
289 | } | |
290 | printk("\n"); | |
291 | } | |
292 | if (ascii) | |
293 | { | |
294 | x = c; | |
295 | for (i=0;i<len;i++) | |
296 | { | |
297 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
298 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
299 | if (*x > 26 && *x < 128) printk("%c", *x); | |
300 | else printk("."); | |
301 | x++; | |
302 | } | |
303 | printk("\n"); | |
304 | } | |
305 | } | |
306 | ||
307 | static void | |
308 | print_cmd(CommandList_struct *cp) | |
309 | { | |
310 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
311 | printk("sglist:%d\n", cp->Header.SGList); | |
312 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
313 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
314 | cp->Header.Tag.lower); | |
315 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
316 | cp->Header.LUN.LunAddrBytes[0], | |
317 | cp->Header.LUN.LunAddrBytes[1], | |
318 | cp->Header.LUN.LunAddrBytes[2], | |
319 | cp->Header.LUN.LunAddrBytes[3], | |
320 | cp->Header.LUN.LunAddrBytes[4], | |
321 | cp->Header.LUN.LunAddrBytes[5], | |
322 | cp->Header.LUN.LunAddrBytes[6], | |
323 | cp->Header.LUN.LunAddrBytes[7]); | |
324 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
325 | printk("Type:%d\n",cp->Request.Type.Type); | |
326 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
327 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
328 | printk("Timeout:%d\n",cp->Request.Timeout); | |
329 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
330 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
331 | cp->Request.CDB[0], cp->Request.CDB[1], | |
332 | cp->Request.CDB[2], cp->Request.CDB[3], | |
333 | cp->Request.CDB[4], cp->Request.CDB[5], | |
334 | cp->Request.CDB[6], cp->Request.CDB[7], | |
335 | cp->Request.CDB[8], cp->Request.CDB[9], | |
336 | cp->Request.CDB[10], cp->Request.CDB[11], | |
337 | cp->Request.CDB[12], cp->Request.CDB[13], | |
338 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
339 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
340 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
341 | cp->ErrDesc.Len); | |
342 | printk("sgs..........Errorinfo:\n"); | |
343 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
344 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
345 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
346 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
347 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
348 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
349 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
350 | ||
351 | } | |
352 | ||
353 | #endif | |
354 | ||
355 | static int | |
f70dba83 | 356 | find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun) |
1da177e4 LT |
357 | { |
358 | /* finds an unused bus, target, lun for a new device */ | |
f70dba83 | 359 | /* assumes h->scsi_ctlr->lock is held */ |
1da177e4 LT |
360 | int i, found=0; |
361 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
362 | ||
363 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
364 | ||
365 | target_taken[SELF_SCSI_ID] = 1; | |
f70dba83 SC |
366 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) |
367 | target_taken[ccissscsi[h->ctlr].dev[i].target] = 1; | |
1da177e4 | 368 | |
f70dba83 | 369 | for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) { |
1da177e4 LT |
370 | if (!target_taken[i]) { |
371 | *bus = 0; *target=i; *lun = 0; found=1; | |
372 | break; | |
373 | } | |
374 | } | |
375 | return (!found); | |
376 | } | |
f4a93bcd MM |
377 | struct scsi2map { |
378 | char scsi3addr[8]; | |
379 | int bus, target, lun; | |
380 | }; | |
1da177e4 LT |
381 | |
382 | static int | |
f70dba83 | 383 | cciss_scsi_add_entry(ctlr_info_t *h, int hostno, |
905bd78f | 384 | struct cciss_scsi_dev_t *device, |
f4a93bcd | 385 | struct scsi2map *added, int *nadded) |
1da177e4 | 386 | { |
f70dba83 SC |
387 | /* assumes h->scsi_ctlr->lock is held */ |
388 | int n = ccissscsi[h->ctlr].ndevices; | |
1da177e4 | 389 | struct cciss_scsi_dev_t *sd; |
935dc8d7 MM |
390 | int i, bus, target, lun; |
391 | unsigned char addr1[8], addr2[8]; | |
1da177e4 LT |
392 | |
393 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
b2a4a43d SC |
394 | dev_warn(&h->pdev->dev, "Too many devices, " |
395 | "some will be inaccessible.\n"); | |
1da177e4 LT |
396 | return -1; |
397 | } | |
f4a93bcd | 398 | |
935dc8d7 MM |
399 | bus = target = -1; |
400 | lun = 0; | |
401 | /* Is this device a non-zero lun of a multi-lun device */ | |
402 | /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ | |
905bd78f | 403 | if (device->scsi3addr[4] != 0) { |
935dc8d7 MM |
404 | /* Search through our list and find the device which */ |
405 | /* has the same 8 byte LUN address, excepting byte 4. */ | |
406 | /* Assign the same bus and target for this new LUN. */ | |
407 | /* Use the logical unit number from the firmware. */ | |
905bd78f | 408 | memcpy(addr1, device->scsi3addr, 8); |
935dc8d7 MM |
409 | addr1[4] = 0; |
410 | for (i = 0; i < n; i++) { | |
f70dba83 | 411 | sd = &ccissscsi[h->ctlr].dev[i]; |
935dc8d7 MM |
412 | memcpy(addr2, sd->scsi3addr, 8); |
413 | addr2[4] = 0; | |
414 | /* differ only in byte 4? */ | |
415 | if (memcmp(addr1, addr2, 8) == 0) { | |
416 | bus = sd->bus; | |
417 | target = sd->target; | |
905bd78f | 418 | lun = device->scsi3addr[4]; |
935dc8d7 MM |
419 | break; |
420 | } | |
421 | } | |
422 | } | |
423 | ||
f70dba83 | 424 | sd = &ccissscsi[h->ctlr].dev[n]; |
935dc8d7 | 425 | if (lun == 0) { |
f70dba83 | 426 | if (find_bus_target_lun(h, |
935dc8d7 MM |
427 | &sd->bus, &sd->target, &sd->lun) != 0) |
428 | return -1; | |
429 | } else { | |
430 | sd->bus = bus; | |
431 | sd->target = target; | |
432 | sd->lun = lun; | |
433 | } | |
f4a93bcd MM |
434 | added[*nadded].bus = sd->bus; |
435 | added[*nadded].target = sd->target; | |
436 | added[*nadded].lun = sd->lun; | |
437 | (*nadded)++; | |
438 | ||
905bd78f | 439 | memcpy(sd->scsi3addr, device->scsi3addr, 8); |
440 | memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); | |
441 | memcpy(sd->revision, device->revision, sizeof(sd->revision)); | |
442 | memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); | |
443 | sd->devtype = device->devtype; | |
444 | ||
f70dba83 | 445 | ccissscsi[h->ctlr].ndevices++; |
1da177e4 LT |
446 | |
447 | /* initially, (before registering with scsi layer) we don't | |
448 | know our hostno and we don't want to print anything first | |
449 | time anyway (the scsi layer's inquiries will show that info) */ | |
450 | if (hostno != -1) | |
b2a4a43d SC |
451 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n", |
452 | scsi_device_type(sd->devtype), hostno, | |
1da177e4 LT |
453 | sd->bus, sd->target, sd->lun); |
454 | return 0; | |
455 | } | |
456 | ||
457 | static void | |
f70dba83 | 458 | cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry, |
f4a93bcd | 459 | struct scsi2map *removed, int *nremoved) |
1da177e4 | 460 | { |
f70dba83 | 461 | /* assumes h->ctlr]->scsi_ctlr->lock is held */ |
1da177e4 LT |
462 | int i; |
463 | struct cciss_scsi_dev_t sd; | |
464 | ||
465 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
f70dba83 | 466 | sd = ccissscsi[h->ctlr].dev[entry]; |
f4a93bcd MM |
467 | removed[*nremoved].bus = sd.bus; |
468 | removed[*nremoved].target = sd.target; | |
469 | removed[*nremoved].lun = sd.lun; | |
470 | (*nremoved)++; | |
f70dba83 SC |
471 | for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++) |
472 | ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1]; | |
473 | ccissscsi[h->ctlr].ndevices--; | |
b2a4a43d SC |
474 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n", |
475 | scsi_device_type(sd.devtype), hostno, | |
1da177e4 LT |
476 | sd.bus, sd.target, sd.lun); |
477 | } | |
478 | ||
479 | ||
480 | #define SCSI3ADDR_EQ(a,b) ( \ | |
481 | (a)[7] == (b)[7] && \ | |
482 | (a)[6] == (b)[6] && \ | |
483 | (a)[5] == (b)[5] && \ | |
484 | (a)[4] == (b)[4] && \ | |
485 | (a)[3] == (b)[3] && \ | |
486 | (a)[2] == (b)[2] && \ | |
487 | (a)[1] == (b)[1] && \ | |
488 | (a)[0] == (b)[0]) | |
489 | ||
f70dba83 | 490 | static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr) |
f4a93bcd MM |
491 | { |
492 | /* called when scsi_add_device fails in order to re-adjust */ | |
493 | /* ccissscsi[] to match the mid layer's view. */ | |
494 | unsigned long flags; | |
495 | int i, j; | |
f70dba83 SC |
496 | CPQ_TAPE_LOCK(h, flags); |
497 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
f4a93bcd | 498 | if (memcmp(scsi3addr, |
f70dba83 SC |
499 | ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) { |
500 | for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++) | |
501 | ccissscsi[h->ctlr].dev[j] = | |
502 | ccissscsi[h->ctlr].dev[j+1]; | |
503 | ccissscsi[h->ctlr].ndevices--; | |
f4a93bcd MM |
504 | break; |
505 | } | |
506 | } | |
f70dba83 | 507 | CPQ_TAPE_UNLOCK(h, flags); |
f4a93bcd MM |
508 | } |
509 | ||
905bd78f | 510 | static int device_is_the_same(struct cciss_scsi_dev_t *dev1, |
511 | struct cciss_scsi_dev_t *dev2) | |
512 | { | |
513 | return dev1->devtype == dev2->devtype && | |
514 | memcmp(dev1->scsi3addr, dev2->scsi3addr, | |
515 | sizeof(dev1->scsi3addr)) == 0 && | |
516 | memcmp(dev1->device_id, dev2->device_id, | |
517 | sizeof(dev1->device_id)) == 0 && | |
518 | memcmp(dev1->vendor, dev2->vendor, | |
519 | sizeof(dev1->vendor)) == 0 && | |
520 | memcmp(dev1->model, dev2->model, | |
521 | sizeof(dev1->model)) == 0 && | |
522 | memcmp(dev1->revision, dev2->revision, | |
523 | sizeof(dev1->revision)) == 0; | |
524 | } | |
525 | ||
1da177e4 | 526 | static int |
f70dba83 | 527 | adjust_cciss_scsi_table(ctlr_info_t *h, int hostno, |
1da177e4 LT |
528 | struct cciss_scsi_dev_t sd[], int nsds) |
529 | { | |
530 | /* sd contains scsi3 addresses and devtypes, but | |
531 | bus target and lun are not filled in. This funciton | |
532 | takes what's in sd to be the current and adjusts | |
533 | ccissscsi[] to be in line with what's in sd. */ | |
534 | ||
535 | int i,j, found, changes=0; | |
536 | struct cciss_scsi_dev_t *csd; | |
537 | unsigned long flags; | |
f4a93bcd MM |
538 | struct scsi2map *added, *removed; |
539 | int nadded, nremoved; | |
540 | struct Scsi_Host *sh = NULL; | |
541 | ||
542 | added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
543 | GFP_KERNEL); | |
544 | removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
545 | GFP_KERNEL); | |
546 | ||
547 | if (!added || !removed) { | |
b2a4a43d SC |
548 | dev_warn(&h->pdev->dev, |
549 | "Out of memory in adjust_cciss_scsi_table\n"); | |
f4a93bcd MM |
550 | goto free_and_out; |
551 | } | |
1da177e4 | 552 | |
f70dba83 | 553 | CPQ_TAPE_LOCK(h, flags); |
1da177e4 | 554 | |
f4a93bcd | 555 | if (hostno != -1) /* if it's not the first time... */ |
f70dba83 | 556 | sh = h->scsi_ctlr->scsi_host; |
f4a93bcd | 557 | |
1da177e4 LT |
558 | /* find any devices in ccissscsi[] that are not in |
559 | sd[] and remove them from ccissscsi[] */ | |
560 | ||
561 | i = 0; | |
f4a93bcd MM |
562 | nremoved = 0; |
563 | nadded = 0; | |
f70dba83 SC |
564 | while (i < ccissscsi[h->ctlr].ndevices) { |
565 | csd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
566 | found=0; |
567 | for (j=0;j<nsds;j++) { | |
568 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
569 | csd->scsi3addr)) { | |
905bd78f | 570 | if (device_is_the_same(&sd[j], csd)) |
1da177e4 LT |
571 | found=2; |
572 | else | |
573 | found=1; | |
574 | break; | |
575 | } | |
576 | } | |
577 | ||
578 | if (found == 0) { /* device no longer present. */ | |
579 | changes++; | |
f70dba83 | 580 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
581 | removed, &nremoved); |
582 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 583 | } else if (found == 1) { /* device is different in some way */ |
1da177e4 | 584 | changes++; |
b2a4a43d SC |
585 | dev_info(&h->pdev->dev, |
586 | "device c%db%dt%dl%d has changed.\n", | |
587 | hostno, csd->bus, csd->target, csd->lun); | |
f70dba83 | 588 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
589 | removed, &nremoved); |
590 | /* remove ^^^, hence i not incremented */ | |
f70dba83 | 591 | if (cciss_scsi_add_entry(h, hostno, &sd[j], |
f4a93bcd MM |
592 | added, &nadded) != 0) |
593 | /* we just removed one, so add can't fail. */ | |
594 | BUG(); | |
1da177e4 | 595 | csd->devtype = sd[j].devtype; |
905bd78f | 596 | memcpy(csd->device_id, sd[j].device_id, |
597 | sizeof(csd->device_id)); | |
598 | memcpy(csd->vendor, sd[j].vendor, | |
599 | sizeof(csd->vendor)); | |
600 | memcpy(csd->model, sd[j].model, | |
601 | sizeof(csd->model)); | |
602 | memcpy(csd->revision, sd[j].revision, | |
603 | sizeof(csd->revision)); | |
1da177e4 LT |
604 | } else /* device is same as it ever was, */ |
605 | i++; /* so just move along. */ | |
606 | } | |
607 | ||
608 | /* Now, make sure every device listed in sd[] is also | |
609 | listed in ccissscsi[], adding them if they aren't found */ | |
610 | ||
611 | for (i=0;i<nsds;i++) { | |
612 | found=0; | |
f70dba83 SC |
613 | for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) { |
614 | csd = &ccissscsi[h->ctlr].dev[j]; | |
1da177e4 LT |
615 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, |
616 | csd->scsi3addr)) { | |
905bd78f | 617 | if (device_is_the_same(&sd[i], csd)) |
1da177e4 LT |
618 | found=2; /* found device */ |
619 | else | |
620 | found=1; /* found a bug. */ | |
621 | break; | |
622 | } | |
623 | } | |
624 | if (!found) { | |
625 | changes++; | |
f70dba83 | 626 | if (cciss_scsi_add_entry(h, hostno, &sd[i], |
f4a93bcd | 627 | added, &nadded) != 0) |
1da177e4 LT |
628 | break; |
629 | } else if (found == 1) { | |
630 | /* should never happen... */ | |
631 | changes++; | |
b2a4a43d SC |
632 | dev_warn(&h->pdev->dev, |
633 | "device unexpectedly changed\n"); | |
1da177e4 LT |
634 | /* but if it does happen, we just ignore that device */ |
635 | } | |
636 | } | |
f70dba83 | 637 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 | 638 | |
f4a93bcd MM |
639 | /* Don't notify scsi mid layer of any changes the first time through */ |
640 | /* (or if there are no changes) scsi_scan_host will do it later the */ | |
641 | /* first time through. */ | |
642 | if (hostno == -1 || !changes) | |
643 | goto free_and_out; | |
644 | ||
645 | /* Notify scsi mid layer of any removed devices */ | |
646 | for (i = 0; i < nremoved; i++) { | |
647 | struct scsi_device *sdev = | |
648 | scsi_device_lookup(sh, removed[i].bus, | |
649 | removed[i].target, removed[i].lun); | |
650 | if (sdev != NULL) { | |
651 | scsi_remove_device(sdev); | |
652 | scsi_device_put(sdev); | |
653 | } else { | |
654 | /* We don't expect to get here. */ | |
655 | /* future cmds to this device will get selection */ | |
656 | /* timeout as if the device was gone. */ | |
b2a4a43d | 657 | dev_warn(&h->pdev->dev, "didn't find " |
f4a93bcd | 658 | "c%db%dt%dl%d\n for removal.", |
b2a4a43d | 659 | hostno, removed[i].bus, |
f4a93bcd MM |
660 | removed[i].target, removed[i].lun); |
661 | } | |
662 | } | |
663 | ||
664 | /* Notify scsi mid layer of any added devices */ | |
665 | for (i = 0; i < nadded; i++) { | |
666 | int rc; | |
667 | rc = scsi_add_device(sh, added[i].bus, | |
668 | added[i].target, added[i].lun); | |
669 | if (rc == 0) | |
670 | continue; | |
b2a4a43d | 671 | dev_warn(&h->pdev->dev, "scsi_add_device " |
f4a93bcd | 672 | "c%db%dt%dl%d failed, device not added.\n", |
b2a4a43d | 673 | hostno, added[i].bus, added[i].target, added[i].lun); |
f4a93bcd MM |
674 | /* now we have to remove it from ccissscsi, */ |
675 | /* since it didn't get added to scsi mid layer */ | |
f70dba83 | 676 | fixup_botched_add(h, added[i].scsi3addr); |
f4a93bcd | 677 | } |
1da177e4 | 678 | |
f4a93bcd MM |
679 | free_and_out: |
680 | kfree(added); | |
681 | kfree(removed); | |
1da177e4 LT |
682 | return 0; |
683 | } | |
684 | ||
685 | static int | |
f70dba83 | 686 | lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr) |
1da177e4 LT |
687 | { |
688 | int i; | |
689 | struct cciss_scsi_dev_t *sd; | |
690 | unsigned long flags; | |
691 | ||
f70dba83 SC |
692 | CPQ_TAPE_LOCK(h, flags); |
693 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
694 | sd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
695 | if (sd->bus == bus && |
696 | sd->target == target && | |
697 | sd->lun == lun) { | |
698 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
f70dba83 | 699 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
700 | return 0; |
701 | } | |
702 | } | |
f70dba83 | 703 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
704 | return -1; |
705 | } | |
706 | ||
707 | static void | |
f70dba83 | 708 | cciss_scsi_setup(ctlr_info_t *h) |
1da177e4 LT |
709 | { |
710 | struct cciss_scsi_adapter_data_t * shba; | |
711 | ||
f70dba83 | 712 | ccissscsi[h->ctlr].ndevices = 0; |
1da177e4 LT |
713 | shba = (struct cciss_scsi_adapter_data_t *) |
714 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
715 | if (shba == NULL) | |
716 | return; | |
717 | shba->scsi_host = NULL; | |
718 | spin_lock_init(&shba->lock); | |
719 | shba->registered = 0; | |
f70dba83 | 720 | if (scsi_cmd_stack_setup(h, shba) != 0) { |
1da177e4 LT |
721 | kfree(shba); |
722 | shba = NULL; | |
723 | } | |
f70dba83 | 724 | h->scsi_ctlr = shba; |
1da177e4 LT |
725 | return; |
726 | } | |
727 | ||
f70dba83 SC |
728 | static void complete_scsi_command(CommandList_struct *c, int timeout, |
729 | __u32 tag) | |
1da177e4 LT |
730 | { |
731 | struct scsi_cmnd *cmd; | |
f70dba83 | 732 | ctlr_info_t *h; |
1da177e4 LT |
733 | ErrorInfo_struct *ei; |
734 | ||
f70dba83 | 735 | ei = c->err_info; |
1da177e4 LT |
736 | |
737 | /* First, see if it was a message rather than a command */ | |
f70dba83 SC |
738 | if (c->Request.Type.Type == TYPE_MSG) { |
739 | c->cmd_type = CMD_MSG_DONE; | |
1da177e4 LT |
740 | return; |
741 | } | |
742 | ||
f70dba83 SC |
743 | cmd = (struct scsi_cmnd *) c->scsi_cmd; |
744 | h = hba[c->ctlr]; | |
1da177e4 | 745 | |
41ce639a | 746 | scsi_dma_unmap(cmd); |
f70dba83 SC |
747 | if (c->Header.SGTotal > h->max_cmd_sgentries) |
748 | cciss_unmap_sg_chain_block(h, c); | |
1da177e4 LT |
749 | |
750 | cmd->result = (DID_OK << 16); /* host byte */ | |
751 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
752 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
753 | ||
754 | cmd->result |= (ei->ScsiStatus); | |
755 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
756 | ||
757 | /* copy the sense data whether we need to or not. */ | |
758 | ||
759 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
760 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
761 | SCSI_SENSE_BUFFERSIZE : | |
762 | ei->SenseLen); | |
41ce639a | 763 | scsi_set_resid(cmd, ei->ResidualCnt); |
1da177e4 LT |
764 | |
765 | if(ei->CommandStatus != 0) | |
766 | { /* an error has occurred */ | |
767 | switch(ei->CommandStatus) | |
768 | { | |
769 | case CMD_TARGET_STATUS: | |
770 | /* Pass it up to the upper layers... */ | |
771 | if( ei->ScsiStatus) | |
772 | { | |
773 | #if 0 | |
774 | printk(KERN_WARNING "cciss: cmd %p " | |
f70dba83 SC |
775 | "has SCSI Status = %x\n", |
776 | c, ei->ScsiStatus); | |
1da177e4 | 777 | #endif |
b0e15f6d | 778 | cmd->result |= (ei->ScsiStatus << 1); |
1da177e4 LT |
779 | } |
780 | else { /* scsi status is zero??? How??? */ | |
781 | ||
782 | /* Ordinarily, this case should never happen, but there is a bug | |
783 | in some released firmware revisions that allows it to happen | |
784 | if, for example, a 4100 backplane loses power and the tape | |
785 | drive is in it. We assume that it's a fatal error of some | |
786 | kind because we can't show that it wasn't. We will make it | |
787 | look like selection timeout since that is the most common | |
788 | reason for this to occur, and it's severe enough. */ | |
789 | ||
790 | cmd->result = DID_NO_CONNECT << 16; | |
791 | } | |
792 | break; | |
793 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
794 | break; | |
795 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 796 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 797 | " completed with data overrun " |
f70dba83 | 798 | "reported\n", c); |
1da177e4 LT |
799 | break; |
800 | case CMD_INVALID: { | |
f70dba83 SC |
801 | /* print_bytes(c, sizeof(*c), 1, 0); |
802 | print_cmd(c); */ | |
1da177e4 LT |
803 | /* We get CMD_INVALID if you address a non-existent tape drive instead |
804 | of a selection timeout (no response). You will see this if you yank | |
805 | out a tape drive, then try to access it. This is kind of a shame | |
806 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
807 | get interpreted as a missing target. */ | |
808 | cmd->result = DID_NO_CONNECT << 16; | |
809 | } | |
810 | break; | |
811 | case CMD_PROTOCOL_ERR: | |
b2a4a43d SC |
812 | dev_warn(&h->pdev->dev, |
813 | "%p has protocol error\n", c); | |
1da177e4 LT |
814 | break; |
815 | case CMD_HARDWARE_ERR: | |
816 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
817 | dev_warn(&h->pdev->dev, |
818 | "%p had hardware error\n", c); | |
1da177e4 LT |
819 | break; |
820 | case CMD_CONNECTION_LOST: | |
821 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
822 | dev_warn(&h->pdev->dev, |
823 | "%p had connection lost\n", c); | |
1da177e4 LT |
824 | break; |
825 | case CMD_ABORTED: | |
826 | cmd->result = DID_ABORT << 16; | |
b2a4a43d | 827 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
828 | break; |
829 | case CMD_ABORT_FAILED: | |
830 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
831 | dev_warn(&h->pdev->dev, |
832 | "%p reports abort failed\n", c); | |
1da177e4 LT |
833 | break; |
834 | case CMD_UNSOLICITED_ABORT: | |
835 | cmd->result = DID_ABORT << 16; | |
b2a4a43d SC |
836 | dev_warn(&h->pdev->dev, "%p aborted do to an " |
837 | "unsolicited abort\n", c); | |
1da177e4 LT |
838 | break; |
839 | case CMD_TIMEOUT: | |
840 | cmd->result = DID_TIME_OUT << 16; | |
b2a4a43d | 841 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 LT |
842 | break; |
843 | default: | |
844 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
845 | dev_warn(&h->pdev->dev, |
846 | "%p returned unknown status %x\n", c, | |
1da177e4 LT |
847 | ei->CommandStatus); |
848 | } | |
849 | } | |
1da177e4 | 850 | cmd->scsi_done(cmd); |
f70dba83 | 851 | scsi_cmd_free(h, c); |
1da177e4 LT |
852 | } |
853 | ||
854 | static int | |
f70dba83 | 855 | cciss_scsi_detect(ctlr_info_t *h) |
1da177e4 LT |
856 | { |
857 | struct Scsi_Host *sh; | |
858 | int error; | |
859 | ||
860 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
861 | if (sh == NULL) | |
862 | goto fail; | |
863 | sh->io_port = 0; // good enough? FIXME, | |
864 | sh->n_io_port = 0; // I don't think we use these two... | |
865 | sh->this_id = SELF_SCSI_ID; | |
f70dba83 | 866 | sh->sg_tablesize = h->maxsgentries; |
79600aad | 867 | sh->max_cmd_len = MAX_COMMAND_SIZE; |
1da177e4 LT |
868 | |
869 | ((struct cciss_scsi_adapter_data_t *) | |
f70dba83 SC |
870 | h->scsi_ctlr)->scsi_host = sh; |
871 | sh->hostdata[0] = (unsigned long) h; | |
872 | sh->irq = h->intr[SIMPLE_MODE_INT]; | |
1da177e4 | 873 | sh->unique_id = sh->irq; |
f70dba83 | 874 | error = scsi_add_host(sh, &h->pdev->dev); |
1da177e4 LT |
875 | if (error) |
876 | goto fail_host_put; | |
877 | scsi_scan_host(sh); | |
878 | return 1; | |
879 | ||
880 | fail_host_put: | |
881 | scsi_host_put(sh); | |
882 | fail: | |
883 | return 0; | |
884 | } | |
885 | ||
886 | static void | |
887 | cciss_unmap_one(struct pci_dev *pdev, | |
f70dba83 | 888 | CommandList_struct *c, |
1da177e4 LT |
889 | size_t buflen, |
890 | int data_direction) | |
891 | { | |
892 | u64bit addr64; | |
893 | ||
f70dba83 SC |
894 | addr64.val32.lower = c->SG[0].Addr.lower; |
895 | addr64.val32.upper = c->SG[0].Addr.upper; | |
1da177e4 LT |
896 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); |
897 | } | |
898 | ||
899 | static void | |
900 | cciss_map_one(struct pci_dev *pdev, | |
f70dba83 | 901 | CommandList_struct *c, |
1da177e4 LT |
902 | unsigned char *buf, |
903 | size_t buflen, | |
904 | int data_direction) | |
905 | { | |
906 | __u64 addr64; | |
907 | ||
908 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
f70dba83 | 909 | c->SG[0].Addr.lower = |
1da177e4 | 910 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); |
f70dba83 | 911 | c->SG[0].Addr.upper = |
1da177e4 | 912 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); |
f70dba83 SC |
913 | c->SG[0].Len = buflen; |
914 | c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
915 | c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
1da177e4 LT |
916 | } |
917 | ||
918 | static int | |
f70dba83 SC |
919 | cciss_scsi_do_simple_cmd(ctlr_info_t *h, |
920 | CommandList_struct *c, | |
1da177e4 LT |
921 | unsigned char *scsi3addr, |
922 | unsigned char *cdb, | |
923 | unsigned char cdblen, | |
924 | unsigned char *buf, int bufsize, | |
925 | int direction) | |
926 | { | |
6e9a4738 | 927 | DECLARE_COMPLETION_ONSTACK(wait); |
1da177e4 | 928 | |
f70dba83 SC |
929 | c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */ |
930 | c->scsi_cmd = NULL; | |
931 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
932 | memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN)); | |
933 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
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 | ||
f70dba83 SC |
940 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); |
941 | memcpy(c->Request.CDB, cdb, cdblen); | |
942 | c->Request.Timeout = 0; | |
943 | c->Request.CDBLen = cdblen; | |
944 | c->Request.Type.Type = TYPE_CMD; | |
945 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
946 | c->Request.Type.Direction = direction; | |
1da177e4 LT |
947 | |
948 | /* Fill in the SG list and do dma mapping */ | |
f70dba83 | 949 | cciss_map_one(h->pdev, c, (unsigned char *) buf, |
1da177e4 LT |
950 | bufsize, DMA_FROM_DEVICE); |
951 | ||
f70dba83 SC |
952 | c->waiting = &wait; |
953 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
954 | wait_for_completion(&wait); |
955 | ||
956 | /* undo the dma mapping */ | |
f70dba83 | 957 | cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE); |
1da177e4 LT |
958 | return(0); |
959 | } | |
960 | ||
961 | static void | |
b2a4a43d | 962 | cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
963 | { |
964 | ErrorInfo_struct *ei; | |
965 | ||
f70dba83 | 966 | ei = c->err_info; |
1da177e4 LT |
967 | switch(ei->CommandStatus) |
968 | { | |
969 | case CMD_TARGET_STATUS: | |
b2a4a43d SC |
970 | dev_warn(&h->pdev->dev, |
971 | "cmd %p has completed with errors\n", c); | |
972 | dev_warn(&h->pdev->dev, | |
973 | "cmd %p has SCSI Status = %x\n", | |
974 | c, ei->ScsiStatus); | |
1da177e4 | 975 | if (ei->ScsiStatus == 0) |
b2a4a43d SC |
976 | dev_warn(&h->pdev->dev, |
977 | "SCSI status is abnormally zero. " | |
1da177e4 LT |
978 | "(probably indicates selection timeout " |
979 | "reported incorrectly due to a known " | |
980 | "firmware bug, circa July, 2001.)\n"); | |
981 | break; | |
982 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
b2a4a43d | 983 | dev_info(&h->pdev->dev, "UNDERRUN\n"); |
1da177e4 LT |
984 | break; |
985 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 986 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 987 | " completed with data overrun " |
f70dba83 | 988 | "reported\n", c); |
1da177e4 LT |
989 | break; |
990 | case CMD_INVALID: { | |
991 | /* controller unfortunately reports SCSI passthru's */ | |
992 | /* to non-existent targets as invalid commands. */ | |
b2a4a43d SC |
993 | dev_warn(&h->pdev->dev, |
994 | "%p is reported invalid (probably means " | |
f70dba83 SC |
995 | "target device no longer present)\n", c); |
996 | /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0); | |
997 | print_cmd(c); */ | |
1da177e4 LT |
998 | } |
999 | break; | |
1000 | case CMD_PROTOCOL_ERR: | |
b2a4a43d | 1001 | dev_warn(&h->pdev->dev, "%p has protocol error\n", c); |
1da177e4 LT |
1002 | break; |
1003 | case CMD_HARDWARE_ERR: | |
1004 | /* cmd->result = DID_ERROR << 16; */ | |
b2a4a43d | 1005 | dev_warn(&h->pdev->dev, "%p had hardware error\n", c); |
1da177e4 LT |
1006 | break; |
1007 | case CMD_CONNECTION_LOST: | |
b2a4a43d | 1008 | dev_warn(&h->pdev->dev, "%p had connection lost\n", c); |
1da177e4 LT |
1009 | break; |
1010 | case CMD_ABORTED: | |
b2a4a43d | 1011 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
1012 | break; |
1013 | case CMD_ABORT_FAILED: | |
b2a4a43d SC |
1014 | dev_warn(&h->pdev->dev, |
1015 | "%p reports abort failed\n", c); | |
1da177e4 LT |
1016 | break; |
1017 | case CMD_UNSOLICITED_ABORT: | |
b2a4a43d SC |
1018 | dev_warn(&h->pdev->dev, |
1019 | "%p aborted do to an unsolicited abort\n", c); | |
1da177e4 LT |
1020 | break; |
1021 | case CMD_TIMEOUT: | |
b2a4a43d | 1022 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 LT |
1023 | break; |
1024 | default: | |
b2a4a43d SC |
1025 | dev_warn(&h->pdev->dev, |
1026 | "%p returned unknown status %x\n", | |
1027 | c, ei->CommandStatus); | |
1da177e4 LT |
1028 | } |
1029 | } | |
1030 | ||
1031 | static int | |
f70dba83 | 1032 | cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1033 | unsigned char page, unsigned char *buf, |
1034 | unsigned char bufsize) | |
1da177e4 LT |
1035 | { |
1036 | int rc; | |
f70dba83 | 1037 | CommandList_struct *c; |
1da177e4 LT |
1038 | char cdb[6]; |
1039 | ErrorInfo_struct *ei; | |
1040 | unsigned long flags; | |
1041 | ||
f70dba83 SC |
1042 | spin_lock_irqsave(&h->lock, flags); |
1043 | c = scsi_cmd_alloc(h); | |
1044 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 | 1045 | |
f70dba83 | 1046 | if (c == NULL) { /* trouble... */ |
1da177e4 LT |
1047 | printk("cmd_alloc returned NULL!\n"); |
1048 | return -1; | |
1049 | } | |
1050 | ||
f70dba83 | 1051 | ei = c->err_info; |
1da177e4 LT |
1052 | |
1053 | cdb[0] = CISS_INQUIRY; | |
905bd78f | 1054 | cdb[1] = (page != 0); |
1055 | cdb[2] = page; | |
1da177e4 | 1056 | cdb[3] = 0; |
47922d06 | 1057 | cdb[4] = bufsize; |
1da177e4 | 1058 | cdb[5] = 0; |
f70dba83 | 1059 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb, |
47922d06 | 1060 | 6, buf, bufsize, XFER_READ); |
1da177e4 LT |
1061 | |
1062 | if (rc != 0) return rc; /* something went wrong */ | |
1063 | ||
1064 | if (ei->CommandStatus != 0 && | |
1065 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1066 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1067 | rc = -1; |
1068 | } | |
f70dba83 SC |
1069 | spin_lock_irqsave(&h->lock, flags); |
1070 | scsi_cmd_free(h, c); | |
1071 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1072 | return rc; |
1073 | } | |
1074 | ||
905bd78f | 1075 | /* Get the device id from inquiry page 0x83 */ |
f70dba83 | 1076 | static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1077 | unsigned char *device_id, int buflen) |
1078 | { | |
1079 | int rc; | |
1080 | unsigned char *buf; | |
1081 | ||
1082 | if (buflen > 16) | |
1083 | buflen = 16; | |
1084 | buf = kzalloc(64, GFP_KERNEL); | |
1085 | if (!buf) | |
1086 | return -1; | |
f70dba83 | 1087 | rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); |
905bd78f | 1088 | if (rc == 0) |
1089 | memcpy(device_id, &buf[8], buflen); | |
1090 | kfree(buf); | |
1091 | return rc != 0; | |
1092 | } | |
1093 | ||
1da177e4 | 1094 | static int |
f70dba83 | 1095 | cciss_scsi_do_report_phys_luns(ctlr_info_t *h, |
1da177e4 LT |
1096 | ReportLunData_struct *buf, int bufsize) |
1097 | { | |
1098 | int rc; | |
f70dba83 | 1099 | CommandList_struct *c; |
1da177e4 LT |
1100 | unsigned char cdb[12]; |
1101 | unsigned char scsi3addr[8]; | |
1102 | ErrorInfo_struct *ei; | |
1103 | unsigned long flags; | |
1104 | ||
f70dba83 SC |
1105 | spin_lock_irqsave(&h->lock, flags); |
1106 | c = scsi_cmd_alloc(h); | |
1107 | spin_unlock_irqrestore(&h->lock, flags); | |
1108 | if (c == NULL) { /* trouble... */ | |
1da177e4 LT |
1109 | printk("cmd_alloc returned NULL!\n"); |
1110 | return -1; | |
1111 | } | |
1112 | ||
1113 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
1114 | cdb[0] = CISS_REPORT_PHYS; | |
1115 | cdb[1] = 0; | |
1116 | cdb[2] = 0; | |
1117 | cdb[3] = 0; | |
1118 | cdb[4] = 0; | |
1119 | cdb[5] = 0; | |
1120 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
1121 | cdb[7] = (bufsize >> 16) & 0xFF; | |
1122 | cdb[8] = (bufsize >> 8) & 0xFF; | |
1123 | cdb[9] = bufsize & 0xFF; | |
1124 | cdb[10] = 0; | |
1125 | cdb[11] = 0; | |
1126 | ||
f70dba83 | 1127 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, |
1da177e4 LT |
1128 | cdb, 12, |
1129 | (unsigned char *) buf, | |
1130 | bufsize, XFER_READ); | |
1131 | ||
1132 | if (rc != 0) return rc; /* something went wrong */ | |
1133 | ||
f70dba83 | 1134 | ei = c->err_info; |
1da177e4 LT |
1135 | if (ei->CommandStatus != 0 && |
1136 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1137 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1138 | rc = -1; |
1139 | } | |
f70dba83 SC |
1140 | spin_lock_irqsave(&h->lock, flags); |
1141 | scsi_cmd_free(h, c); | |
1142 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1143 | return rc; |
1144 | } | |
1145 | ||
1146 | static void | |
f70dba83 | 1147 | cciss_update_non_disk_devices(ctlr_info_t *h, int hostno) |
1da177e4 LT |
1148 | { |
1149 | /* the idea here is we could get notified from /proc | |
1150 | that some devices have changed, so we do a report | |
1151 | physical luns cmd, and adjust our list of devices | |
1152 | accordingly. (We can't rely on the scsi-mid layer just | |
1153 | doing inquiries, because the "busses" that the scsi | |
1154 | mid-layer probes are totally fabricated by this driver, | |
1155 | so new devices wouldn't show up. | |
1156 | ||
1157 | the scsi3addr's of devices won't change so long as the | |
1158 | adapter is not reset. That means we can rescan and | |
1159 | tell which devices we already know about, vs. new | |
1160 | devices, vs. disappearing devices. | |
1161 | ||
1162 | Also, if you yank out a tape drive, then put in a disk | |
1163 | in it's place, (say, a configured volume from another | |
1164 | array controller for instance) _don't_ poke this driver | |
1165 | (so it thinks it's still a tape, but _do_ poke the scsi | |
1166 | mid layer, so it does an inquiry... the scsi mid layer | |
1167 | will see the physical disk. This would be bad. Need to | |
1168 | think about how to prevent that. One idea would be to | |
1169 | snoop all scsi responses and if an inquiry repsonse comes | |
1170 | back that reports a disk, chuck it an return selection | |
1171 | timeout instead and adjust our table... Not sure i like | |
1172 | that though. | |
1173 | ||
1174 | */ | |
47922d06 MM |
1175 | #define OBDR_TAPE_INQ_SIZE 49 |
1176 | #define OBDR_TAPE_SIG "$DR-10" | |
1da177e4 | 1177 | ReportLunData_struct *ld_buff; |
47922d06 | 1178 | unsigned char *inq_buff; |
1da177e4 | 1179 | unsigned char scsi3addr[8]; |
1da177e4 LT |
1180 | __u32 num_luns=0; |
1181 | unsigned char *ch; | |
905bd78f | 1182 | struct cciss_scsi_dev_t *currentsd, *this_device; |
1da177e4 LT |
1183 | int ncurrent=0; |
1184 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1185 | int i; | |
1186 | ||
06ff37ff | 1187 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
47922d06 | 1188 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
905bd78f | 1189 | currentsd = kzalloc(sizeof(*currentsd) * |
1190 | (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); | |
1191 | if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { | |
1192 | printk(KERN_ERR "cciss: out of memory\n"); | |
1193 | goto out; | |
1da177e4 | 1194 | } |
905bd78f | 1195 | this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
f70dba83 | 1196 | if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) { |
1da177e4 LT |
1197 | ch = &ld_buff->LUNListLength[0]; |
1198 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1199 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1200 | printk(KERN_WARNING | |
1201 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1202 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1203 | num_luns - CISS_MAX_PHYS_LUN); | |
1204 | num_luns = CISS_MAX_PHYS_LUN; | |
1205 | } | |
1206 | } | |
1207 | else { | |
1208 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1209 | goto out; | |
1210 | } | |
1211 | ||
1212 | ||
1213 | /* adjust our table of devices */ | |
905bd78f | 1214 | for (i = 0; i < num_luns; i++) { |
1da177e4 LT |
1215 | /* for each physical lun, do an inquiry */ |
1216 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
47922d06 | 1217 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
1da177e4 LT |
1218 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
1219 | ||
f70dba83 | 1220 | if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, |
905bd78f | 1221 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) |
1da177e4 | 1222 | /* Inquiry failed (msg printed already) */ |
905bd78f | 1223 | continue; /* so we will skip this device. */ |
1224 | ||
1225 | this_device->devtype = (inq_buff[0] & 0x1f); | |
1226 | this_device->bus = -1; | |
1227 | this_device->target = -1; | |
1228 | this_device->lun = -1; | |
1229 | memcpy(this_device->scsi3addr, scsi3addr, 8); | |
1230 | memcpy(this_device->vendor, &inq_buff[8], | |
1231 | sizeof(this_device->vendor)); | |
1232 | memcpy(this_device->model, &inq_buff[16], | |
1233 | sizeof(this_device->model)); | |
1234 | memcpy(this_device->revision, &inq_buff[32], | |
1235 | sizeof(this_device->revision)); | |
1236 | memset(this_device->device_id, 0, | |
1237 | sizeof(this_device->device_id)); | |
f70dba83 | 1238 | cciss_scsi_get_device_id(h, scsi3addr, |
905bd78f | 1239 | this_device->device_id, sizeof(this_device->device_id)); |
1240 | ||
1241 | switch (this_device->devtype) | |
1da177e4 | 1242 | { |
47922d06 MM |
1243 | case 0x05: /* CD-ROM */ { |
1244 | ||
1245 | /* We don't *really* support actual CD-ROM devices, | |
1246 | * just this "One Button Disaster Recovery" tape drive | |
1247 | * which temporarily pretends to be a CD-ROM drive. | |
1248 | * So we check that the device is really an OBDR tape | |
1249 | * device by checking for "$DR-10" in bytes 43-48 of | |
1250 | * the inquiry data. | |
1251 | */ | |
1252 | char obdr_sig[7]; | |
1253 | ||
1254 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1255 | obdr_sig[6] = '\0'; | |
1256 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1257 | /* Not OBDR device, ignore it. */ | |
1258 | break; | |
1259 | } | |
1260 | /* fall through . . . */ | |
1da177e4 LT |
1261 | case 0x01: /* sequential access, (tape) */ |
1262 | case 0x08: /* medium changer */ | |
1263 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1264 | printk(KERN_INFO "cciss%d: %s ignored, " | |
f70dba83 | 1265 | "too many devices.\n", h->ctlr, |
905bd78f | 1266 | scsi_device_type(this_device->devtype)); |
1da177e4 LT |
1267 | break; |
1268 | } | |
905bd78f | 1269 | currentsd[ncurrent] = *this_device; |
1da177e4 LT |
1270 | ncurrent++; |
1271 | break; | |
1272 | default: | |
1273 | break; | |
1274 | } | |
1275 | } | |
1276 | ||
f70dba83 | 1277 | adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent); |
1da177e4 LT |
1278 | out: |
1279 | kfree(inq_buff); | |
1280 | kfree(ld_buff); | |
905bd78f | 1281 | kfree(currentsd); |
1da177e4 LT |
1282 | return; |
1283 | } | |
1284 | ||
1285 | static int | |
1286 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1287 | { | |
1288 | int verb_len = strlen(verb); | |
1289 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1290 | return verb_len; | |
1291 | else | |
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | static int | |
f70dba83 | 1296 | cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length) |
1da177e4 LT |
1297 | { |
1298 | int arg_len; | |
1299 | ||
1300 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
f70dba83 | 1301 | cciss_update_non_disk_devices(h, hostno); |
1da177e4 LT |
1302 | else |
1303 | return -EINVAL; | |
1304 | return length; | |
1305 | } | |
1306 | ||
1307 | ||
1308 | static int | |
1309 | cciss_scsi_proc_info(struct Scsi_Host *sh, | |
1310 | char *buffer, /* data buffer */ | |
1311 | char **start, /* where data in buffer starts */ | |
1312 | off_t offset, /* offset from start of imaginary file */ | |
1313 | int length, /* length of data in buffer */ | |
1314 | int func) /* 0 == read, 1 == write */ | |
1315 | { | |
1316 | ||
1317 | int buflen, datalen; | |
f70dba83 | 1318 | ctlr_info_t *h; |
b9f0bd08 | 1319 | int i; |
1da177e4 | 1320 | |
f70dba83 SC |
1321 | h = (ctlr_info_t *) sh->hostdata[0]; |
1322 | if (h == NULL) /* This really shouldn't ever happen. */ | |
1da177e4 LT |
1323 | return -EINVAL; |
1324 | ||
1da177e4 | 1325 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ |
b9f0bd08 | 1326 | buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", |
f70dba83 | 1327 | h->ctlr, sh->host_no); |
b9f0bd08 MM |
1328 | |
1329 | /* this information is needed by apps to know which cciss | |
1330 | device corresponds to which scsi host number without | |
1331 | having to open a scsi target device node. The device | |
1332 | information is not a duplicate of /proc/scsi/scsi because | |
1333 | the two may be out of sync due to scsi hotplug, rather | |
1334 | this info is for an app to be able to use to know how to | |
1335 | get them back in sync. */ | |
1336 | ||
f70dba83 SC |
1337 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { |
1338 | struct cciss_scsi_dev_t *sd = | |
1339 | &ccissscsi[h->ctlr].dev[i]; | |
b9f0bd08 MM |
1340 | buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " |
1341 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1342 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1343 | sd->devtype, | |
1344 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1345 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1346 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1347 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1348 | } | |
1da177e4 LT |
1349 | datalen = buflen - offset; |
1350 | if (datalen < 0) { /* they're reading past EOF. */ | |
1351 | datalen = 0; | |
1352 | *start = buffer+buflen; | |
1353 | } else | |
1354 | *start = buffer + offset; | |
1355 | return(datalen); | |
1356 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ | |
f70dba83 | 1357 | return cciss_scsi_user_command(h, sh->host_no, |
1da177e4 LT |
1358 | buffer, length); |
1359 | } | |
1360 | ||
1361 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1362 | dma mapping and fills in the scatter gather entries of the | |
f70dba83 | 1363 | cciss command, c. */ |
1da177e4 | 1364 | |
f70dba83 | 1365 | static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c, |
87c3a922 | 1366 | struct scsi_cmnd *cmd) |
1da177e4 | 1367 | { |
41ce639a FT |
1368 | unsigned int len; |
1369 | struct scatterlist *sg; | |
1da177e4 | 1370 | __u64 addr64; |
87c3a922 SC |
1371 | int request_nsgs, i, chained, sg_index; |
1372 | struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr; | |
1373 | SGDescriptor_struct *curr_sg; | |
1374 | ||
1375 | BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); | |
1376 | ||
1377 | chained = 0; | |
1378 | sg_index = 0; | |
f70dba83 | 1379 | curr_sg = c->SG; |
87c3a922 SC |
1380 | request_nsgs = scsi_dma_map(cmd); |
1381 | if (request_nsgs) { | |
1382 | scsi_for_each_sg(cmd, sg, request_nsgs, i) { | |
1383 | if (sg_index + 1 == h->max_cmd_sgentries && | |
1384 | !chained && request_nsgs - i > 1) { | |
1385 | chained = 1; | |
1386 | sg_index = 0; | |
f70dba83 | 1387 | curr_sg = sa->cmd_sg_list[c->cmdindex]; |
87c3a922 | 1388 | } |
41ce639a FT |
1389 | addr64 = (__u64) sg_dma_address(sg); |
1390 | len = sg_dma_len(sg); | |
87c3a922 SC |
1391 | curr_sg[sg_index].Addr.lower = |
1392 | (__u32) (addr64 & 0x0FFFFFFFFULL); | |
1393 | curr_sg[sg_index].Addr.upper = | |
1394 | (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); | |
1395 | curr_sg[sg_index].Len = len; | |
1396 | curr_sg[sg_index].Ext = 0; | |
1397 | ++sg_index; | |
1da177e4 | 1398 | } |
87c3a922 | 1399 | if (chained) |
f70dba83 SC |
1400 | cciss_map_sg_chain_block(h, c, |
1401 | sa->cmd_sg_list[c->cmdindex], | |
87c3a922 SC |
1402 | (request_nsgs - (h->max_cmd_sgentries - 1)) * |
1403 | sizeof(SGDescriptor_struct)); | |
41ce639a | 1404 | } |
87c3a922 SC |
1405 | /* track how many SG entries we are using */ |
1406 | if (request_nsgs > h->maxSG) | |
1407 | h->maxSG = request_nsgs; | |
f70dba83 | 1408 | c->Header.SGTotal = (__u8) request_nsgs + chained; |
87c3a922 | 1409 | if (request_nsgs > h->max_cmd_sgentries) |
f70dba83 | 1410 | c->Header.SGList = h->max_cmd_sgentries; |
87c3a922 | 1411 | else |
f70dba83 | 1412 | c->Header.SGList = c->Header.SGTotal; |
1da177e4 LT |
1413 | return; |
1414 | } | |
1415 | ||
1416 | ||
1417 | static int | |
f281233d | 1418 | cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
1da177e4 | 1419 | { |
f70dba83 SC |
1420 | ctlr_info_t *h; |
1421 | int rc; | |
1da177e4 | 1422 | unsigned char scsi3addr[8]; |
f70dba83 | 1423 | CommandList_struct *c; |
1da177e4 LT |
1424 | unsigned long flags; |
1425 | ||
1426 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1427 | // We violate cmd->host privacy here. (Is there another way?) | |
f70dba83 | 1428 | h = (ctlr_info_t *) cmd->device->host->hostdata[0]; |
1da177e4 | 1429 | |
f70dba83 | 1430 | rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id, |
1da177e4 LT |
1431 | cmd->device->lun, scsi3addr); |
1432 | if (rc != 0) { | |
1433 | /* the scsi nexus does not match any that we presented... */ | |
1434 | /* pretend to mid layer that we got selection timeout */ | |
1435 | cmd->result = DID_NO_CONNECT << 16; | |
1436 | done(cmd); | |
1437 | /* we might want to think about registering controller itself | |
1438 | as a processor device on the bus so sg binds to it. */ | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1da177e4 LT |
1442 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and |
1443 | see what the device thinks of it. */ | |
1444 | ||
f70dba83 SC |
1445 | spin_lock_irqsave(&h->lock, flags); |
1446 | c = scsi_cmd_alloc(h); | |
1447 | spin_unlock_irqrestore(&h->lock, flags); | |
1448 | if (c == NULL) { /* trouble... */ | |
b2a4a43d | 1449 | dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n"); |
1da177e4 LT |
1450 | /* FIXME: next 3 lines are -> BAD! <- */ |
1451 | cmd->result = DID_NO_CONNECT << 16; | |
1452 | done(cmd); | |
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | // Fill in the command list header | |
1457 | ||
1458 | cmd->scsi_done = done; // save this for use by completion code | |
1459 | ||
f70dba83 SC |
1460 | /* save c in case we have to abort it */ |
1461 | cmd->host_scribble = (unsigned char *) c; | |
1da177e4 | 1462 | |
f70dba83 SC |
1463 | c->cmd_type = CMD_SCSI; |
1464 | c->scsi_cmd = cmd; | |
1465 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
1466 | memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1467 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
1468 | |
1469 | // Fill in the request block... | |
1470 | ||
f70dba83 SC |
1471 | c->Request.Timeout = 0; |
1472 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); | |
1473 | BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); | |
1474 | c->Request.CDBLen = cmd->cmd_len; | |
1475 | memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1476 | c->Request.Type.Type = TYPE_CMD; | |
1477 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
1da177e4 LT |
1478 | switch(cmd->sc_data_direction) |
1479 | { | |
f70dba83 SC |
1480 | case DMA_TO_DEVICE: |
1481 | c->Request.Type.Direction = XFER_WRITE; | |
1482 | break; | |
1483 | case DMA_FROM_DEVICE: | |
1484 | c->Request.Type.Direction = XFER_READ; | |
1485 | break; | |
1486 | case DMA_NONE: | |
1487 | c->Request.Type.Direction = XFER_NONE; | |
1488 | break; | |
1da177e4 LT |
1489 | case DMA_BIDIRECTIONAL: |
1490 | // This can happen if a buggy application does a scsi passthru | |
1491 | // and sets both inlen and outlen to non-zero. ( see | |
1492 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1493 | ||
f70dba83 | 1494 | c->Request.Type.Direction = XFER_RSVD; |
1da177e4 LT |
1495 | // This is technically wrong, and cciss controllers should |
1496 | // reject it with CMD_INVALID, which is the most correct | |
1497 | // response, but non-fibre backends appear to let it | |
1498 | // slide by, and give the same results as if this field | |
1499 | // were set correctly. Either way is acceptable for | |
1500 | // our purposes here. | |
1501 | ||
1502 | break; | |
1503 | ||
1504 | default: | |
b2a4a43d | 1505 | dev_warn(&h->pdev->dev, "unknown data direction: %d\n", |
1da177e4 LT |
1506 | cmd->sc_data_direction); |
1507 | BUG(); | |
1508 | break; | |
1509 | } | |
f70dba83 SC |
1510 | cciss_scatter_gather(h, c, cmd); |
1511 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
1512 | /* the cmd'll come back via intr handler in complete_scsi_command() */ |
1513 | return 0; | |
1514 | } | |
1515 | ||
f281233d JG |
1516 | static DEF_SCSI_QCMD(cciss_scsi_queue_command) |
1517 | ||
f70dba83 | 1518 | static void cciss_unregister_scsi(ctlr_info_t *h) |
1da177e4 LT |
1519 | { |
1520 | struct cciss_scsi_adapter_data_t *sa; | |
1521 | struct cciss_scsi_cmd_stack_t *stk; | |
1522 | unsigned long flags; | |
1523 | ||
1524 | /* we are being forcibly unloaded, and may not refuse. */ | |
1525 | ||
f70dba83 SC |
1526 | spin_lock_irqsave(&h->lock, flags); |
1527 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1528 | stk = &sa->cmd_stack; |
1529 | ||
1530 | /* if we weren't ever actually registered, don't unregister */ | |
1531 | if (sa->registered) { | |
f70dba83 | 1532 | spin_unlock_irqrestore(&h->lock, flags); |
1da177e4 LT |
1533 | scsi_remove_host(sa->scsi_host); |
1534 | scsi_host_put(sa->scsi_host); | |
f70dba83 | 1535 | spin_lock_irqsave(&h->lock, flags); |
1da177e4 LT |
1536 | } |
1537 | ||
1538 | /* set scsi_host to NULL so our detect routine will | |
1539 | find us on register */ | |
1540 | sa->scsi_host = NULL; | |
f70dba83 SC |
1541 | spin_unlock_irqrestore(&h->lock, flags); |
1542 | scsi_cmd_stack_free(h); | |
1da177e4 | 1543 | kfree(sa); |
1da177e4 LT |
1544 | } |
1545 | ||
f70dba83 | 1546 | static int cciss_engage_scsi(ctlr_info_t *h) |
1da177e4 LT |
1547 | { |
1548 | struct cciss_scsi_adapter_data_t *sa; | |
1549 | struct cciss_scsi_cmd_stack_t *stk; | |
1550 | unsigned long flags; | |
1551 | ||
f70dba83 SC |
1552 | spin_lock_irqsave(&h->lock, flags); |
1553 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1554 | stk = &sa->cmd_stack; |
1555 | ||
f4a93bcd | 1556 | if (sa->registered) { |
b2a4a43d | 1557 | dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n"); |
f70dba83 | 1558 | spin_unlock_irqrestore(&h->lock, flags); |
8721c81f | 1559 | return -ENXIO; |
1da177e4 | 1560 | } |
f4a93bcd | 1561 | sa->registered = 1; |
f70dba83 SC |
1562 | spin_unlock_irqrestore(&h->lock, flags); |
1563 | cciss_update_non_disk_devices(h, -1); | |
1564 | cciss_scsi_detect(h); | |
1da177e4 LT |
1565 | return 0; |
1566 | } | |
1567 | ||
1568 | static void | |
f70dba83 | 1569 | cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h) |
1da177e4 LT |
1570 | { |
1571 | unsigned long flags; | |
1da177e4 | 1572 | |
f70dba83 | 1573 | CPQ_TAPE_LOCK(h, flags); |
89b6e743 | 1574 | seq_printf(seq, |
b9f0bd08 | 1575 | "Sequential access devices: %d\n\n", |
f70dba83 SC |
1576 | ccissscsi[h->ctlr].ndevices); |
1577 | CPQ_TAPE_UNLOCK(h, flags); | |
1da177e4 LT |
1578 | } |
1579 | ||
88f627ae SC |
1580 | static int wait_for_device_to_become_ready(ctlr_info_t *h, |
1581 | unsigned char lunaddr[]) | |
1582 | { | |
1583 | int rc; | |
1584 | int count = 0; | |
1585 | int waittime = HZ; | |
1586 | CommandList_struct *c; | |
1587 | ||
6b4d96b8 | 1588 | c = cmd_alloc(h); |
88f627ae | 1589 | if (!c) { |
b2a4a43d SC |
1590 | dev_warn(&h->pdev->dev, "out of memory in " |
1591 | "wait_for_device_to_become_ready.\n"); | |
88f627ae SC |
1592 | return IO_ERROR; |
1593 | } | |
1594 | ||
1595 | /* Send test unit ready until device ready, or give up. */ | |
1596 | while (count < 20) { | |
1597 | ||
1598 | /* Wait for a bit. do this first, because if we send | |
1599 | * the TUR right away, the reset will just abort it. | |
1600 | */ | |
40df6ae4 | 1601 | schedule_timeout_uninterruptible(waittime); |
88f627ae SC |
1602 | count++; |
1603 | ||
1604 | /* Increase wait time with each try, up to a point. */ | |
1605 | if (waittime < (HZ * 30)) | |
1606 | waittime = waittime * 2; | |
1607 | ||
1608 | /* Send the Test Unit Ready */ | |
f70dba83 | 1609 | rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0, |
88f627ae | 1610 | lunaddr, TYPE_CMD); |
85cc61ae | 1611 | if (rc == 0) |
1612 | rc = sendcmd_withirq_core(h, c, 0); | |
1613 | ||
1614 | (void) process_sendcmd_error(h, c); | |
88f627ae | 1615 | |
3969251b | 1616 | if (rc != 0) |
1617 | goto retry_tur; | |
88f627ae | 1618 | |
3969251b | 1619 | if (c->err_info->CommandStatus == CMD_SUCCESS) |
88f627ae SC |
1620 | break; |
1621 | ||
3969251b | 1622 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && |
1623 | c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { | |
1624 | if (c->err_info->SenseInfo[2] == NO_SENSE) | |
1625 | break; | |
1626 | if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { | |
1627 | unsigned char asc; | |
1628 | asc = c->err_info->SenseInfo[12]; | |
1629 | check_for_unit_attention(h, c); | |
1630 | if (asc == POWER_OR_RESET) | |
1631 | break; | |
1632 | } | |
1633 | } | |
1634 | retry_tur: | |
b2a4a43d | 1635 | dev_warn(&h->pdev->dev, "Waiting %d secs " |
88f627ae | 1636 | "for device to become ready.\n", |
b2a4a43d | 1637 | waittime / HZ); |
88f627ae SC |
1638 | rc = 1; /* device not ready. */ |
1639 | } | |
1640 | ||
1641 | if (rc) | |
b2a4a43d | 1642 | dev_warn(&h->pdev->dev, "giving up on device.\n"); |
88f627ae | 1643 | else |
b2a4a43d | 1644 | dev_warn(&h->pdev->dev, "device is ready.\n"); |
88f627ae | 1645 | |
6b4d96b8 | 1646 | cmd_free(h, c); |
88f627ae SC |
1647 | return rc; |
1648 | } | |
89b6e743 | 1649 | |
3da8b713 | 1650 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
1651 | * complaining. Doing a host- or bus-reset can't do anything good here. | |
1652 | * Despite what it might say in scsi_error.c, there may well be commands | |
1653 | * on the controller, as the cciss driver registers twice, once as a block | |
1654 | * device for the logical drives, and once as a scsi device, for any tape | |
1655 | * drives. So we know there are no commands out on the tape drives, but we | |
1656 | * don't know there are no commands on the controller, and it is likely | |
1657 | * that there probably are, as the cciss block device is most commonly used | |
1658 | * as a boot device (embedded controller on HP/Compaq systems.) | |
1659 | */ | |
1660 | ||
1661 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) | |
1662 | { | |
1663 | int rc; | |
1664 | CommandList_struct *cmd_in_trouble; | |
88f627ae | 1665 | unsigned char lunaddr[8]; |
f70dba83 | 1666 | ctlr_info_t *h; |
3da8b713 | 1667 | |
1668 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1669 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1670 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1671 | return FAILED; |
b2a4a43d | 1672 | dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n"); |
3da8b713 | 1673 | /* find the command that's giving us trouble */ |
1674 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; | |
88f627ae | 1675 | if (cmd_in_trouble == NULL) /* paranoia */ |
3da8b713 | 1676 | return FAILED; |
88f627ae | 1677 | memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); |
3da8b713 | 1678 | /* send a reset to the SCSI LUN which the command was sent to */ |
f70dba83 | 1679 | rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr, |
3da8b713 | 1680 | TYPE_MSG); |
f70dba83 | 1681 | if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0) |
3da8b713 | 1682 | return SUCCESS; |
b2a4a43d | 1683 | dev_warn(&h->pdev->dev, "resetting device failed.\n"); |
3da8b713 | 1684 | return FAILED; |
1685 | } | |
1686 | ||
1687 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) | |
1688 | { | |
1689 | int rc; | |
1690 | CommandList_struct *cmd_to_abort; | |
85cc61ae | 1691 | unsigned char lunaddr[8]; |
f70dba83 | 1692 | ctlr_info_t *h; |
3da8b713 | 1693 | |
1694 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1695 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1696 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1697 | return FAILED; |
b2a4a43d | 1698 | dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n"); |
3da8b713 | 1699 | |
1700 | /* find the command to be aborted */ | |
1701 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; | |
1702 | if (cmd_to_abort == NULL) /* paranoia */ | |
1703 | return FAILED; | |
85cc61ae | 1704 | memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); |
f70dba83 | 1705 | rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag, |
85cc61ae | 1706 | 0, 0, lunaddr, TYPE_MSG); |
3da8b713 | 1707 | if (rc == 0) |
1708 | return SUCCESS; | |
1709 | return FAILED; | |
1710 | ||
1711 | } | |
1712 | ||
1da177e4 LT |
1713 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
1714 | ||
1715 | /* If no tape support, then these become defined out of existence */ | |
1716 | ||
1717 | #define cciss_scsi_setup(cntl_num) | |
1da177e4 LT |
1718 | |
1719 | #endif /* CONFIG_CISS_SCSI_TAPE */ |