Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
bd4f36d6 MM |
2 | * Disk Array driver for HP Smart Array controllers, SCSI Tape module. |
3 | * (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P. | |
1da177e4 LT |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
bd4f36d6 | 7 | * the Free Software Foundation; version 2 of the License. |
1da177e4 LT |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
bd4f36d6 MM |
11 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * General Public License for more details. | |
1da177e4 LT |
13 | * |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
bd4f36d6 MM |
16 | * Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA |
17 | * 02111-1307, USA. | |
1da177e4 LT |
18 | * |
19 | * Questions/Comments/Bugfixes to iss_storagedev@hp.com | |
20 | * | |
21 | * Author: Stephen M. Cameron | |
22 | */ | |
23 | #ifdef CONFIG_CISS_SCSI_TAPE | |
24 | ||
25 | /* Here we have code to present the driver as a scsi driver | |
26 | as it is simultaneously presented as a block driver. The | |
27 | reason for doing this is to allow access to SCSI tape drives | |
28 | through the array controller. Note in particular, neither | |
29 | physical nor logical disks are presented through the scsi layer. */ | |
30 | ||
4e57b681 TS |
31 | #include <linux/timer.h> |
32 | #include <linux/completion.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/string.h> | |
35 | ||
36 | #include <asm/atomic.h> | |
37 | ||
1da177e4 LT |
38 | #include <scsi/scsi_cmnd.h> |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_host.h> | |
1da177e4 LT |
41 | |
42 | #include "cciss_scsi.h" | |
43 | ||
3da8b713 | 44 | #define CCISS_ABORT_MSG 0x00 |
45 | #define CCISS_RESET_MSG 0x01 | |
46 | ||
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 | ||
229 | for (i=0; i<CMD_STACK_SIZE; i++) { | |
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 LT |
234 | } |
235 | stk->top = CMD_STACK_SIZE-1; | |
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 LT |
247 | stk = &sa->cmd_stack; |
248 | if (stk->top != CMD_STACK_SIZE-1) { | |
b2a4a43d SC |
249 | dev_warn(&h->pdev->dev, |
250 | "bug: %d scsi commands are still outstanding.\n", | |
1da177e4 | 251 | CMD_STACK_SIZE - stk->top); |
1da177e4 LT |
252 | } |
253 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
254 | ||
f70dba83 | 255 | pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle); |
1da177e4 | 256 | stk->pool = NULL; |
87c3a922 | 257 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE); |
1da177e4 LT |
258 | } |
259 | ||
400bb236 | 260 | #if 0 |
1da177e4 LT |
261 | static int xmargin=8; |
262 | static int amargin=60; | |
263 | ||
264 | static void | |
265 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
266 | { | |
267 | ||
268 | int i; | |
269 | unsigned char *x; | |
270 | ||
271 | if (hex) | |
272 | { | |
273 | x = c; | |
274 | for (i=0;i<len;i++) | |
275 | { | |
276 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
277 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
278 | printk(" %02x", *x); | |
279 | x++; | |
280 | } | |
281 | printk("\n"); | |
282 | } | |
283 | if (ascii) | |
284 | { | |
285 | x = c; | |
286 | for (i=0;i<len;i++) | |
287 | { | |
288 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
289 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
290 | if (*x > 26 && *x < 128) printk("%c", *x); | |
291 | else printk("."); | |
292 | x++; | |
293 | } | |
294 | printk("\n"); | |
295 | } | |
296 | } | |
297 | ||
298 | static void | |
299 | print_cmd(CommandList_struct *cp) | |
300 | { | |
301 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
302 | printk("sglist:%d\n", cp->Header.SGList); | |
303 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
304 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
305 | cp->Header.Tag.lower); | |
306 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
307 | cp->Header.LUN.LunAddrBytes[0], | |
308 | cp->Header.LUN.LunAddrBytes[1], | |
309 | cp->Header.LUN.LunAddrBytes[2], | |
310 | cp->Header.LUN.LunAddrBytes[3], | |
311 | cp->Header.LUN.LunAddrBytes[4], | |
312 | cp->Header.LUN.LunAddrBytes[5], | |
313 | cp->Header.LUN.LunAddrBytes[6], | |
314 | cp->Header.LUN.LunAddrBytes[7]); | |
315 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
316 | printk("Type:%d\n",cp->Request.Type.Type); | |
317 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
318 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
319 | printk("Timeout:%d\n",cp->Request.Timeout); | |
320 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
321 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
322 | cp->Request.CDB[0], cp->Request.CDB[1], | |
323 | cp->Request.CDB[2], cp->Request.CDB[3], | |
324 | cp->Request.CDB[4], cp->Request.CDB[5], | |
325 | cp->Request.CDB[6], cp->Request.CDB[7], | |
326 | cp->Request.CDB[8], cp->Request.CDB[9], | |
327 | cp->Request.CDB[10], cp->Request.CDB[11], | |
328 | cp->Request.CDB[12], cp->Request.CDB[13], | |
329 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
330 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
331 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
332 | cp->ErrDesc.Len); | |
333 | printk("sgs..........Errorinfo:\n"); | |
334 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
335 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
336 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
337 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
338 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
339 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
340 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
341 | ||
342 | } | |
343 | ||
344 | #endif | |
345 | ||
346 | static int | |
f70dba83 | 347 | find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun) |
1da177e4 LT |
348 | { |
349 | /* finds an unused bus, target, lun for a new device */ | |
f70dba83 | 350 | /* assumes h->scsi_ctlr->lock is held */ |
1da177e4 LT |
351 | int i, found=0; |
352 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
353 | ||
354 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
355 | ||
356 | target_taken[SELF_SCSI_ID] = 1; | |
f70dba83 SC |
357 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) |
358 | target_taken[ccissscsi[h->ctlr].dev[i].target] = 1; | |
1da177e4 | 359 | |
f70dba83 | 360 | for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) { |
1da177e4 LT |
361 | if (!target_taken[i]) { |
362 | *bus = 0; *target=i; *lun = 0; found=1; | |
363 | break; | |
364 | } | |
365 | } | |
366 | return (!found); | |
367 | } | |
f4a93bcd MM |
368 | struct scsi2map { |
369 | char scsi3addr[8]; | |
370 | int bus, target, lun; | |
371 | }; | |
1da177e4 LT |
372 | |
373 | static int | |
f70dba83 | 374 | cciss_scsi_add_entry(ctlr_info_t *h, int hostno, |
905bd78f | 375 | struct cciss_scsi_dev_t *device, |
f4a93bcd | 376 | struct scsi2map *added, int *nadded) |
1da177e4 | 377 | { |
f70dba83 SC |
378 | /* assumes h->scsi_ctlr->lock is held */ |
379 | int n = ccissscsi[h->ctlr].ndevices; | |
1da177e4 | 380 | struct cciss_scsi_dev_t *sd; |
935dc8d7 MM |
381 | int i, bus, target, lun; |
382 | unsigned char addr1[8], addr2[8]; | |
1da177e4 LT |
383 | |
384 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
b2a4a43d SC |
385 | dev_warn(&h->pdev->dev, "Too many devices, " |
386 | "some will be inaccessible.\n"); | |
1da177e4 LT |
387 | return -1; |
388 | } | |
f4a93bcd | 389 | |
935dc8d7 MM |
390 | bus = target = -1; |
391 | lun = 0; | |
392 | /* Is this device a non-zero lun of a multi-lun device */ | |
393 | /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ | |
905bd78f | 394 | if (device->scsi3addr[4] != 0) { |
935dc8d7 MM |
395 | /* Search through our list and find the device which */ |
396 | /* has the same 8 byte LUN address, excepting byte 4. */ | |
397 | /* Assign the same bus and target for this new LUN. */ | |
398 | /* Use the logical unit number from the firmware. */ | |
905bd78f | 399 | memcpy(addr1, device->scsi3addr, 8); |
935dc8d7 MM |
400 | addr1[4] = 0; |
401 | for (i = 0; i < n; i++) { | |
f70dba83 | 402 | sd = &ccissscsi[h->ctlr].dev[i]; |
935dc8d7 MM |
403 | memcpy(addr2, sd->scsi3addr, 8); |
404 | addr2[4] = 0; | |
405 | /* differ only in byte 4? */ | |
406 | if (memcmp(addr1, addr2, 8) == 0) { | |
407 | bus = sd->bus; | |
408 | target = sd->target; | |
905bd78f | 409 | lun = device->scsi3addr[4]; |
935dc8d7 MM |
410 | break; |
411 | } | |
412 | } | |
413 | } | |
414 | ||
f70dba83 | 415 | sd = &ccissscsi[h->ctlr].dev[n]; |
935dc8d7 | 416 | if (lun == 0) { |
f70dba83 | 417 | if (find_bus_target_lun(h, |
935dc8d7 MM |
418 | &sd->bus, &sd->target, &sd->lun) != 0) |
419 | return -1; | |
420 | } else { | |
421 | sd->bus = bus; | |
422 | sd->target = target; | |
423 | sd->lun = lun; | |
424 | } | |
f4a93bcd MM |
425 | added[*nadded].bus = sd->bus; |
426 | added[*nadded].target = sd->target; | |
427 | added[*nadded].lun = sd->lun; | |
428 | (*nadded)++; | |
429 | ||
905bd78f | 430 | memcpy(sd->scsi3addr, device->scsi3addr, 8); |
431 | memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); | |
432 | memcpy(sd->revision, device->revision, sizeof(sd->revision)); | |
433 | memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); | |
434 | sd->devtype = device->devtype; | |
435 | ||
f70dba83 | 436 | ccissscsi[h->ctlr].ndevices++; |
1da177e4 LT |
437 | |
438 | /* initially, (before registering with scsi layer) we don't | |
439 | know our hostno and we don't want to print anything first | |
440 | time anyway (the scsi layer's inquiries will show that info) */ | |
441 | if (hostno != -1) | |
b2a4a43d SC |
442 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n", |
443 | scsi_device_type(sd->devtype), hostno, | |
1da177e4 LT |
444 | sd->bus, sd->target, sd->lun); |
445 | return 0; | |
446 | } | |
447 | ||
448 | static void | |
f70dba83 | 449 | cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry, |
f4a93bcd | 450 | struct scsi2map *removed, int *nremoved) |
1da177e4 | 451 | { |
f70dba83 | 452 | /* assumes h->ctlr]->scsi_ctlr->lock is held */ |
1da177e4 LT |
453 | int i; |
454 | struct cciss_scsi_dev_t sd; | |
455 | ||
456 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
f70dba83 | 457 | sd = ccissscsi[h->ctlr].dev[entry]; |
f4a93bcd MM |
458 | removed[*nremoved].bus = sd.bus; |
459 | removed[*nremoved].target = sd.target; | |
460 | removed[*nremoved].lun = sd.lun; | |
461 | (*nremoved)++; | |
f70dba83 SC |
462 | for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++) |
463 | ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1]; | |
464 | ccissscsi[h->ctlr].ndevices--; | |
b2a4a43d SC |
465 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n", |
466 | scsi_device_type(sd.devtype), hostno, | |
1da177e4 LT |
467 | sd.bus, sd.target, sd.lun); |
468 | } | |
469 | ||
470 | ||
471 | #define SCSI3ADDR_EQ(a,b) ( \ | |
472 | (a)[7] == (b)[7] && \ | |
473 | (a)[6] == (b)[6] && \ | |
474 | (a)[5] == (b)[5] && \ | |
475 | (a)[4] == (b)[4] && \ | |
476 | (a)[3] == (b)[3] && \ | |
477 | (a)[2] == (b)[2] && \ | |
478 | (a)[1] == (b)[1] && \ | |
479 | (a)[0] == (b)[0]) | |
480 | ||
f70dba83 | 481 | static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr) |
f4a93bcd MM |
482 | { |
483 | /* called when scsi_add_device fails in order to re-adjust */ | |
484 | /* ccissscsi[] to match the mid layer's view. */ | |
485 | unsigned long flags; | |
486 | int i, j; | |
f70dba83 SC |
487 | CPQ_TAPE_LOCK(h, flags); |
488 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
f4a93bcd | 489 | if (memcmp(scsi3addr, |
f70dba83 SC |
490 | ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) { |
491 | for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++) | |
492 | ccissscsi[h->ctlr].dev[j] = | |
493 | ccissscsi[h->ctlr].dev[j+1]; | |
494 | ccissscsi[h->ctlr].ndevices--; | |
f4a93bcd MM |
495 | break; |
496 | } | |
497 | } | |
f70dba83 | 498 | CPQ_TAPE_UNLOCK(h, flags); |
f4a93bcd MM |
499 | } |
500 | ||
905bd78f | 501 | static int device_is_the_same(struct cciss_scsi_dev_t *dev1, |
502 | struct cciss_scsi_dev_t *dev2) | |
503 | { | |
504 | return dev1->devtype == dev2->devtype && | |
505 | memcmp(dev1->scsi3addr, dev2->scsi3addr, | |
506 | sizeof(dev1->scsi3addr)) == 0 && | |
507 | memcmp(dev1->device_id, dev2->device_id, | |
508 | sizeof(dev1->device_id)) == 0 && | |
509 | memcmp(dev1->vendor, dev2->vendor, | |
510 | sizeof(dev1->vendor)) == 0 && | |
511 | memcmp(dev1->model, dev2->model, | |
512 | sizeof(dev1->model)) == 0 && | |
513 | memcmp(dev1->revision, dev2->revision, | |
514 | sizeof(dev1->revision)) == 0; | |
515 | } | |
516 | ||
1da177e4 | 517 | static int |
f70dba83 | 518 | adjust_cciss_scsi_table(ctlr_info_t *h, int hostno, |
1da177e4 LT |
519 | struct cciss_scsi_dev_t sd[], int nsds) |
520 | { | |
521 | /* sd contains scsi3 addresses and devtypes, but | |
522 | bus target and lun are not filled in. This funciton | |
523 | takes what's in sd to be the current and adjusts | |
524 | ccissscsi[] to be in line with what's in sd. */ | |
525 | ||
526 | int i,j, found, changes=0; | |
527 | struct cciss_scsi_dev_t *csd; | |
528 | unsigned long flags; | |
f4a93bcd MM |
529 | struct scsi2map *added, *removed; |
530 | int nadded, nremoved; | |
531 | struct Scsi_Host *sh = NULL; | |
532 | ||
533 | added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
534 | GFP_KERNEL); | |
535 | removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
536 | GFP_KERNEL); | |
537 | ||
538 | if (!added || !removed) { | |
b2a4a43d SC |
539 | dev_warn(&h->pdev->dev, |
540 | "Out of memory in adjust_cciss_scsi_table\n"); | |
f4a93bcd MM |
541 | goto free_and_out; |
542 | } | |
1da177e4 | 543 | |
f70dba83 | 544 | CPQ_TAPE_LOCK(h, flags); |
1da177e4 | 545 | |
f4a93bcd | 546 | if (hostno != -1) /* if it's not the first time... */ |
f70dba83 | 547 | sh = h->scsi_ctlr->scsi_host; |
f4a93bcd | 548 | |
1da177e4 LT |
549 | /* find any devices in ccissscsi[] that are not in |
550 | sd[] and remove them from ccissscsi[] */ | |
551 | ||
552 | i = 0; | |
f4a93bcd MM |
553 | nremoved = 0; |
554 | nadded = 0; | |
f70dba83 SC |
555 | while (i < ccissscsi[h->ctlr].ndevices) { |
556 | csd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
557 | found=0; |
558 | for (j=0;j<nsds;j++) { | |
559 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
560 | csd->scsi3addr)) { | |
905bd78f | 561 | if (device_is_the_same(&sd[j], csd)) |
1da177e4 LT |
562 | found=2; |
563 | else | |
564 | found=1; | |
565 | break; | |
566 | } | |
567 | } | |
568 | ||
569 | if (found == 0) { /* device no longer present. */ | |
570 | changes++; | |
f70dba83 | 571 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
572 | removed, &nremoved); |
573 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 574 | } else if (found == 1) { /* device is different in some way */ |
1da177e4 | 575 | changes++; |
b2a4a43d SC |
576 | dev_info(&h->pdev->dev, |
577 | "device c%db%dt%dl%d has changed.\n", | |
578 | hostno, csd->bus, csd->target, csd->lun); | |
f70dba83 | 579 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
580 | removed, &nremoved); |
581 | /* remove ^^^, hence i not incremented */ | |
f70dba83 | 582 | if (cciss_scsi_add_entry(h, hostno, &sd[j], |
f4a93bcd MM |
583 | added, &nadded) != 0) |
584 | /* we just removed one, so add can't fail. */ | |
585 | BUG(); | |
1da177e4 | 586 | csd->devtype = sd[j].devtype; |
905bd78f | 587 | memcpy(csd->device_id, sd[j].device_id, |
588 | sizeof(csd->device_id)); | |
589 | memcpy(csd->vendor, sd[j].vendor, | |
590 | sizeof(csd->vendor)); | |
591 | memcpy(csd->model, sd[j].model, | |
592 | sizeof(csd->model)); | |
593 | memcpy(csd->revision, sd[j].revision, | |
594 | sizeof(csd->revision)); | |
1da177e4 LT |
595 | } else /* device is same as it ever was, */ |
596 | i++; /* so just move along. */ | |
597 | } | |
598 | ||
599 | /* Now, make sure every device listed in sd[] is also | |
600 | listed in ccissscsi[], adding them if they aren't found */ | |
601 | ||
602 | for (i=0;i<nsds;i++) { | |
603 | found=0; | |
f70dba83 SC |
604 | for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) { |
605 | csd = &ccissscsi[h->ctlr].dev[j]; | |
1da177e4 LT |
606 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, |
607 | csd->scsi3addr)) { | |
905bd78f | 608 | if (device_is_the_same(&sd[i], csd)) |
1da177e4 LT |
609 | found=2; /* found device */ |
610 | else | |
611 | found=1; /* found a bug. */ | |
612 | break; | |
613 | } | |
614 | } | |
615 | if (!found) { | |
616 | changes++; | |
f70dba83 | 617 | if (cciss_scsi_add_entry(h, hostno, &sd[i], |
f4a93bcd | 618 | added, &nadded) != 0) |
1da177e4 LT |
619 | break; |
620 | } else if (found == 1) { | |
621 | /* should never happen... */ | |
622 | changes++; | |
b2a4a43d SC |
623 | dev_warn(&h->pdev->dev, |
624 | "device unexpectedly changed\n"); | |
1da177e4 LT |
625 | /* but if it does happen, we just ignore that device */ |
626 | } | |
627 | } | |
f70dba83 | 628 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 | 629 | |
f4a93bcd MM |
630 | /* Don't notify scsi mid layer of any changes the first time through */ |
631 | /* (or if there are no changes) scsi_scan_host will do it later the */ | |
632 | /* first time through. */ | |
633 | if (hostno == -1 || !changes) | |
634 | goto free_and_out; | |
635 | ||
636 | /* Notify scsi mid layer of any removed devices */ | |
637 | for (i = 0; i < nremoved; i++) { | |
638 | struct scsi_device *sdev = | |
639 | scsi_device_lookup(sh, removed[i].bus, | |
640 | removed[i].target, removed[i].lun); | |
641 | if (sdev != NULL) { | |
642 | scsi_remove_device(sdev); | |
643 | scsi_device_put(sdev); | |
644 | } else { | |
645 | /* We don't expect to get here. */ | |
646 | /* future cmds to this device will get selection */ | |
647 | /* timeout as if the device was gone. */ | |
b2a4a43d | 648 | dev_warn(&h->pdev->dev, "didn't find " |
f4a93bcd | 649 | "c%db%dt%dl%d\n for removal.", |
b2a4a43d | 650 | hostno, removed[i].bus, |
f4a93bcd MM |
651 | removed[i].target, removed[i].lun); |
652 | } | |
653 | } | |
654 | ||
655 | /* Notify scsi mid layer of any added devices */ | |
656 | for (i = 0; i < nadded; i++) { | |
657 | int rc; | |
658 | rc = scsi_add_device(sh, added[i].bus, | |
659 | added[i].target, added[i].lun); | |
660 | if (rc == 0) | |
661 | continue; | |
b2a4a43d | 662 | dev_warn(&h->pdev->dev, "scsi_add_device " |
f4a93bcd | 663 | "c%db%dt%dl%d failed, device not added.\n", |
b2a4a43d | 664 | hostno, added[i].bus, added[i].target, added[i].lun); |
f4a93bcd MM |
665 | /* now we have to remove it from ccissscsi, */ |
666 | /* since it didn't get added to scsi mid layer */ | |
f70dba83 | 667 | fixup_botched_add(h, added[i].scsi3addr); |
f4a93bcd | 668 | } |
1da177e4 | 669 | |
f4a93bcd MM |
670 | free_and_out: |
671 | kfree(added); | |
672 | kfree(removed); | |
1da177e4 LT |
673 | return 0; |
674 | } | |
675 | ||
676 | static int | |
f70dba83 | 677 | lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr) |
1da177e4 LT |
678 | { |
679 | int i; | |
680 | struct cciss_scsi_dev_t *sd; | |
681 | unsigned long flags; | |
682 | ||
f70dba83 SC |
683 | CPQ_TAPE_LOCK(h, flags); |
684 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
685 | sd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
686 | if (sd->bus == bus && |
687 | sd->target == target && | |
688 | sd->lun == lun) { | |
689 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
f70dba83 | 690 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
691 | return 0; |
692 | } | |
693 | } | |
f70dba83 | 694 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
695 | return -1; |
696 | } | |
697 | ||
698 | static void | |
f70dba83 | 699 | cciss_scsi_setup(ctlr_info_t *h) |
1da177e4 LT |
700 | { |
701 | struct cciss_scsi_adapter_data_t * shba; | |
702 | ||
f70dba83 | 703 | ccissscsi[h->ctlr].ndevices = 0; |
1da177e4 LT |
704 | shba = (struct cciss_scsi_adapter_data_t *) |
705 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
706 | if (shba == NULL) | |
707 | return; | |
708 | shba->scsi_host = NULL; | |
709 | spin_lock_init(&shba->lock); | |
710 | shba->registered = 0; | |
f70dba83 | 711 | if (scsi_cmd_stack_setup(h, shba) != 0) { |
1da177e4 LT |
712 | kfree(shba); |
713 | shba = NULL; | |
714 | } | |
f70dba83 | 715 | h->scsi_ctlr = shba; |
1da177e4 LT |
716 | return; |
717 | } | |
718 | ||
f70dba83 SC |
719 | static void complete_scsi_command(CommandList_struct *c, int timeout, |
720 | __u32 tag) | |
1da177e4 LT |
721 | { |
722 | struct scsi_cmnd *cmd; | |
f70dba83 | 723 | ctlr_info_t *h; |
1da177e4 LT |
724 | ErrorInfo_struct *ei; |
725 | ||
f70dba83 | 726 | ei = c->err_info; |
1da177e4 LT |
727 | |
728 | /* First, see if it was a message rather than a command */ | |
f70dba83 SC |
729 | if (c->Request.Type.Type == TYPE_MSG) { |
730 | c->cmd_type = CMD_MSG_DONE; | |
1da177e4 LT |
731 | return; |
732 | } | |
733 | ||
f70dba83 SC |
734 | cmd = (struct scsi_cmnd *) c->scsi_cmd; |
735 | h = hba[c->ctlr]; | |
1da177e4 | 736 | |
41ce639a | 737 | scsi_dma_unmap(cmd); |
f70dba83 SC |
738 | if (c->Header.SGTotal > h->max_cmd_sgentries) |
739 | cciss_unmap_sg_chain_block(h, c); | |
1da177e4 LT |
740 | |
741 | cmd->result = (DID_OK << 16); /* host byte */ | |
742 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
743 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
744 | ||
745 | cmd->result |= (ei->ScsiStatus); | |
746 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
747 | ||
748 | /* copy the sense data whether we need to or not. */ | |
749 | ||
750 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
751 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
752 | SCSI_SENSE_BUFFERSIZE : | |
753 | ei->SenseLen); | |
41ce639a | 754 | scsi_set_resid(cmd, ei->ResidualCnt); |
1da177e4 LT |
755 | |
756 | if(ei->CommandStatus != 0) | |
757 | { /* an error has occurred */ | |
758 | switch(ei->CommandStatus) | |
759 | { | |
760 | case CMD_TARGET_STATUS: | |
761 | /* Pass it up to the upper layers... */ | |
762 | if( ei->ScsiStatus) | |
763 | { | |
764 | #if 0 | |
765 | printk(KERN_WARNING "cciss: cmd %p " | |
f70dba83 SC |
766 | "has SCSI Status = %x\n", |
767 | c, ei->ScsiStatus); | |
1da177e4 | 768 | #endif |
b0e15f6d | 769 | cmd->result |= (ei->ScsiStatus << 1); |
1da177e4 LT |
770 | } |
771 | else { /* scsi status is zero??? How??? */ | |
772 | ||
773 | /* Ordinarily, this case should never happen, but there is a bug | |
774 | in some released firmware revisions that allows it to happen | |
775 | if, for example, a 4100 backplane loses power and the tape | |
776 | drive is in it. We assume that it's a fatal error of some | |
777 | kind because we can't show that it wasn't. We will make it | |
778 | look like selection timeout since that is the most common | |
779 | reason for this to occur, and it's severe enough. */ | |
780 | ||
781 | cmd->result = DID_NO_CONNECT << 16; | |
782 | } | |
783 | break; | |
784 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
785 | break; | |
786 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 787 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 788 | " completed with data overrun " |
f70dba83 | 789 | "reported\n", c); |
1da177e4 LT |
790 | break; |
791 | case CMD_INVALID: { | |
f70dba83 SC |
792 | /* print_bytes(c, sizeof(*c), 1, 0); |
793 | print_cmd(c); */ | |
1da177e4 LT |
794 | /* We get CMD_INVALID if you address a non-existent tape drive instead |
795 | of a selection timeout (no response). You will see this if you yank | |
796 | out a tape drive, then try to access it. This is kind of a shame | |
797 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
798 | get interpreted as a missing target. */ | |
799 | cmd->result = DID_NO_CONNECT << 16; | |
800 | } | |
801 | break; | |
802 | case CMD_PROTOCOL_ERR: | |
b2a4a43d SC |
803 | dev_warn(&h->pdev->dev, |
804 | "%p has protocol error\n", c); | |
1da177e4 LT |
805 | break; |
806 | case CMD_HARDWARE_ERR: | |
807 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
808 | dev_warn(&h->pdev->dev, |
809 | "%p had hardware error\n", c); | |
1da177e4 LT |
810 | break; |
811 | case CMD_CONNECTION_LOST: | |
812 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
813 | dev_warn(&h->pdev->dev, |
814 | "%p had connection lost\n", c); | |
1da177e4 LT |
815 | break; |
816 | case CMD_ABORTED: | |
817 | cmd->result = DID_ABORT << 16; | |
b2a4a43d | 818 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
819 | break; |
820 | case CMD_ABORT_FAILED: | |
821 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
822 | dev_warn(&h->pdev->dev, |
823 | "%p reports abort failed\n", c); | |
1da177e4 LT |
824 | break; |
825 | case CMD_UNSOLICITED_ABORT: | |
826 | cmd->result = DID_ABORT << 16; | |
b2a4a43d SC |
827 | dev_warn(&h->pdev->dev, "%p aborted do to an " |
828 | "unsolicited abort\n", c); | |
1da177e4 LT |
829 | break; |
830 | case CMD_TIMEOUT: | |
831 | cmd->result = DID_TIME_OUT << 16; | |
b2a4a43d | 832 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 LT |
833 | break; |
834 | default: | |
835 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
836 | dev_warn(&h->pdev->dev, |
837 | "%p returned unknown status %x\n", c, | |
1da177e4 LT |
838 | ei->CommandStatus); |
839 | } | |
840 | } | |
1da177e4 | 841 | cmd->scsi_done(cmd); |
f70dba83 | 842 | scsi_cmd_free(h, c); |
1da177e4 LT |
843 | } |
844 | ||
845 | static int | |
f70dba83 | 846 | cciss_scsi_detect(ctlr_info_t *h) |
1da177e4 LT |
847 | { |
848 | struct Scsi_Host *sh; | |
849 | int error; | |
850 | ||
851 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
852 | if (sh == NULL) | |
853 | goto fail; | |
854 | sh->io_port = 0; // good enough? FIXME, | |
855 | sh->n_io_port = 0; // I don't think we use these two... | |
856 | sh->this_id = SELF_SCSI_ID; | |
f70dba83 | 857 | sh->sg_tablesize = h->maxsgentries; |
79600aad | 858 | sh->max_cmd_len = MAX_COMMAND_SIZE; |
1da177e4 LT |
859 | |
860 | ((struct cciss_scsi_adapter_data_t *) | |
f70dba83 SC |
861 | h->scsi_ctlr)->scsi_host = sh; |
862 | sh->hostdata[0] = (unsigned long) h; | |
863 | sh->irq = h->intr[SIMPLE_MODE_INT]; | |
1da177e4 | 864 | sh->unique_id = sh->irq; |
f70dba83 | 865 | error = scsi_add_host(sh, &h->pdev->dev); |
1da177e4 LT |
866 | if (error) |
867 | goto fail_host_put; | |
868 | scsi_scan_host(sh); | |
869 | return 1; | |
870 | ||
871 | fail_host_put: | |
872 | scsi_host_put(sh); | |
873 | fail: | |
874 | return 0; | |
875 | } | |
876 | ||
877 | static void | |
878 | cciss_unmap_one(struct pci_dev *pdev, | |
f70dba83 | 879 | CommandList_struct *c, |
1da177e4 LT |
880 | size_t buflen, |
881 | int data_direction) | |
882 | { | |
883 | u64bit addr64; | |
884 | ||
f70dba83 SC |
885 | addr64.val32.lower = c->SG[0].Addr.lower; |
886 | addr64.val32.upper = c->SG[0].Addr.upper; | |
1da177e4 LT |
887 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); |
888 | } | |
889 | ||
890 | static void | |
891 | cciss_map_one(struct pci_dev *pdev, | |
f70dba83 | 892 | CommandList_struct *c, |
1da177e4 LT |
893 | unsigned char *buf, |
894 | size_t buflen, | |
895 | int data_direction) | |
896 | { | |
897 | __u64 addr64; | |
898 | ||
899 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
f70dba83 | 900 | c->SG[0].Addr.lower = |
1da177e4 | 901 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); |
f70dba83 | 902 | c->SG[0].Addr.upper = |
1da177e4 | 903 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); |
f70dba83 SC |
904 | c->SG[0].Len = buflen; |
905 | c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
906 | c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
1da177e4 LT |
907 | } |
908 | ||
909 | static int | |
f70dba83 SC |
910 | cciss_scsi_do_simple_cmd(ctlr_info_t *h, |
911 | CommandList_struct *c, | |
1da177e4 LT |
912 | unsigned char *scsi3addr, |
913 | unsigned char *cdb, | |
914 | unsigned char cdblen, | |
915 | unsigned char *buf, int bufsize, | |
916 | int direction) | |
917 | { | |
6e9a4738 | 918 | DECLARE_COMPLETION_ONSTACK(wait); |
1da177e4 | 919 | |
f70dba83 SC |
920 | c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */ |
921 | c->scsi_cmd = NULL; | |
922 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
923 | memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN)); | |
924 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
925 | // Fill in the request block... |
926 | ||
927 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
928 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
929 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
930 | ||
f70dba83 SC |
931 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); |
932 | memcpy(c->Request.CDB, cdb, cdblen); | |
933 | c->Request.Timeout = 0; | |
934 | c->Request.CDBLen = cdblen; | |
935 | c->Request.Type.Type = TYPE_CMD; | |
936 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
937 | c->Request.Type.Direction = direction; | |
1da177e4 LT |
938 | |
939 | /* Fill in the SG list and do dma mapping */ | |
f70dba83 | 940 | cciss_map_one(h->pdev, c, (unsigned char *) buf, |
1da177e4 LT |
941 | bufsize, DMA_FROM_DEVICE); |
942 | ||
f70dba83 SC |
943 | c->waiting = &wait; |
944 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
945 | wait_for_completion(&wait); |
946 | ||
947 | /* undo the dma mapping */ | |
f70dba83 | 948 | cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE); |
1da177e4 LT |
949 | return(0); |
950 | } | |
951 | ||
952 | static void | |
b2a4a43d | 953 | cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
954 | { |
955 | ErrorInfo_struct *ei; | |
956 | ||
f70dba83 | 957 | ei = c->err_info; |
1da177e4 LT |
958 | switch(ei->CommandStatus) |
959 | { | |
960 | case CMD_TARGET_STATUS: | |
b2a4a43d SC |
961 | dev_warn(&h->pdev->dev, |
962 | "cmd %p has completed with errors\n", c); | |
963 | dev_warn(&h->pdev->dev, | |
964 | "cmd %p has SCSI Status = %x\n", | |
965 | c, ei->ScsiStatus); | |
1da177e4 | 966 | if (ei->ScsiStatus == 0) |
b2a4a43d SC |
967 | dev_warn(&h->pdev->dev, |
968 | "SCSI status is abnormally zero. " | |
1da177e4 LT |
969 | "(probably indicates selection timeout " |
970 | "reported incorrectly due to a known " | |
971 | "firmware bug, circa July, 2001.)\n"); | |
972 | break; | |
973 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
b2a4a43d | 974 | dev_info(&h->pdev->dev, "UNDERRUN\n"); |
1da177e4 LT |
975 | break; |
976 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 977 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 978 | " completed with data overrun " |
f70dba83 | 979 | "reported\n", c); |
1da177e4 LT |
980 | break; |
981 | case CMD_INVALID: { | |
982 | /* controller unfortunately reports SCSI passthru's */ | |
983 | /* to non-existent targets as invalid commands. */ | |
b2a4a43d SC |
984 | dev_warn(&h->pdev->dev, |
985 | "%p is reported invalid (probably means " | |
f70dba83 SC |
986 | "target device no longer present)\n", c); |
987 | /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0); | |
988 | print_cmd(c); */ | |
1da177e4 LT |
989 | } |
990 | break; | |
991 | case CMD_PROTOCOL_ERR: | |
b2a4a43d | 992 | dev_warn(&h->pdev->dev, "%p has protocol error\n", c); |
1da177e4 LT |
993 | break; |
994 | case CMD_HARDWARE_ERR: | |
995 | /* cmd->result = DID_ERROR << 16; */ | |
b2a4a43d | 996 | dev_warn(&h->pdev->dev, "%p had hardware error\n", c); |
1da177e4 LT |
997 | break; |
998 | case CMD_CONNECTION_LOST: | |
b2a4a43d | 999 | dev_warn(&h->pdev->dev, "%p had connection lost\n", c); |
1da177e4 LT |
1000 | break; |
1001 | case CMD_ABORTED: | |
b2a4a43d | 1002 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
1003 | break; |
1004 | case CMD_ABORT_FAILED: | |
b2a4a43d SC |
1005 | dev_warn(&h->pdev->dev, |
1006 | "%p reports abort failed\n", c); | |
1da177e4 LT |
1007 | break; |
1008 | case CMD_UNSOLICITED_ABORT: | |
b2a4a43d SC |
1009 | dev_warn(&h->pdev->dev, |
1010 | "%p aborted do to an unsolicited abort\n", c); | |
1da177e4 LT |
1011 | break; |
1012 | case CMD_TIMEOUT: | |
b2a4a43d | 1013 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 LT |
1014 | break; |
1015 | default: | |
b2a4a43d SC |
1016 | dev_warn(&h->pdev->dev, |
1017 | "%p returned unknown status %x\n", | |
1018 | c, ei->CommandStatus); | |
1da177e4 LT |
1019 | } |
1020 | } | |
1021 | ||
1022 | static int | |
f70dba83 | 1023 | cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1024 | unsigned char page, unsigned char *buf, |
1025 | unsigned char bufsize) | |
1da177e4 LT |
1026 | { |
1027 | int rc; | |
f70dba83 | 1028 | CommandList_struct *c; |
1da177e4 LT |
1029 | char cdb[6]; |
1030 | ErrorInfo_struct *ei; | |
1031 | unsigned long flags; | |
1032 | ||
f70dba83 SC |
1033 | spin_lock_irqsave(&h->lock, flags); |
1034 | c = scsi_cmd_alloc(h); | |
1035 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 | 1036 | |
f70dba83 | 1037 | if (c == NULL) { /* trouble... */ |
1da177e4 LT |
1038 | printk("cmd_alloc returned NULL!\n"); |
1039 | return -1; | |
1040 | } | |
1041 | ||
f70dba83 | 1042 | ei = c->err_info; |
1da177e4 LT |
1043 | |
1044 | cdb[0] = CISS_INQUIRY; | |
905bd78f | 1045 | cdb[1] = (page != 0); |
1046 | cdb[2] = page; | |
1da177e4 | 1047 | cdb[3] = 0; |
47922d06 | 1048 | cdb[4] = bufsize; |
1da177e4 | 1049 | cdb[5] = 0; |
f70dba83 | 1050 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb, |
47922d06 | 1051 | 6, buf, bufsize, XFER_READ); |
1da177e4 LT |
1052 | |
1053 | if (rc != 0) return rc; /* something went wrong */ | |
1054 | ||
1055 | if (ei->CommandStatus != 0 && | |
1056 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1057 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1058 | rc = -1; |
1059 | } | |
f70dba83 SC |
1060 | spin_lock_irqsave(&h->lock, flags); |
1061 | scsi_cmd_free(h, c); | |
1062 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1063 | return rc; |
1064 | } | |
1065 | ||
905bd78f | 1066 | /* Get the device id from inquiry page 0x83 */ |
f70dba83 | 1067 | static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1068 | unsigned char *device_id, int buflen) |
1069 | { | |
1070 | int rc; | |
1071 | unsigned char *buf; | |
1072 | ||
1073 | if (buflen > 16) | |
1074 | buflen = 16; | |
1075 | buf = kzalloc(64, GFP_KERNEL); | |
1076 | if (!buf) | |
1077 | return -1; | |
f70dba83 | 1078 | rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); |
905bd78f | 1079 | if (rc == 0) |
1080 | memcpy(device_id, &buf[8], buflen); | |
1081 | kfree(buf); | |
1082 | return rc != 0; | |
1083 | } | |
1084 | ||
1da177e4 | 1085 | static int |
f70dba83 | 1086 | cciss_scsi_do_report_phys_luns(ctlr_info_t *h, |
1da177e4 LT |
1087 | ReportLunData_struct *buf, int bufsize) |
1088 | { | |
1089 | int rc; | |
f70dba83 | 1090 | CommandList_struct *c; |
1da177e4 LT |
1091 | unsigned char cdb[12]; |
1092 | unsigned char scsi3addr[8]; | |
1093 | ErrorInfo_struct *ei; | |
1094 | unsigned long flags; | |
1095 | ||
f70dba83 SC |
1096 | spin_lock_irqsave(&h->lock, flags); |
1097 | c = scsi_cmd_alloc(h); | |
1098 | spin_unlock_irqrestore(&h->lock, flags); | |
1099 | if (c == NULL) { /* trouble... */ | |
1da177e4 LT |
1100 | printk("cmd_alloc returned NULL!\n"); |
1101 | return -1; | |
1102 | } | |
1103 | ||
1104 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
1105 | cdb[0] = CISS_REPORT_PHYS; | |
1106 | cdb[1] = 0; | |
1107 | cdb[2] = 0; | |
1108 | cdb[3] = 0; | |
1109 | cdb[4] = 0; | |
1110 | cdb[5] = 0; | |
1111 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
1112 | cdb[7] = (bufsize >> 16) & 0xFF; | |
1113 | cdb[8] = (bufsize >> 8) & 0xFF; | |
1114 | cdb[9] = bufsize & 0xFF; | |
1115 | cdb[10] = 0; | |
1116 | cdb[11] = 0; | |
1117 | ||
f70dba83 | 1118 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, |
1da177e4 LT |
1119 | cdb, 12, |
1120 | (unsigned char *) buf, | |
1121 | bufsize, XFER_READ); | |
1122 | ||
1123 | if (rc != 0) return rc; /* something went wrong */ | |
1124 | ||
f70dba83 | 1125 | ei = c->err_info; |
1da177e4 LT |
1126 | if (ei->CommandStatus != 0 && |
1127 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1128 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1129 | rc = -1; |
1130 | } | |
f70dba83 SC |
1131 | spin_lock_irqsave(&h->lock, flags); |
1132 | scsi_cmd_free(h, c); | |
1133 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1134 | return rc; |
1135 | } | |
1136 | ||
1137 | static void | |
f70dba83 | 1138 | cciss_update_non_disk_devices(ctlr_info_t *h, int hostno) |
1da177e4 LT |
1139 | { |
1140 | /* the idea here is we could get notified from /proc | |
1141 | that some devices have changed, so we do a report | |
1142 | physical luns cmd, and adjust our list of devices | |
1143 | accordingly. (We can't rely on the scsi-mid layer just | |
1144 | doing inquiries, because the "busses" that the scsi | |
1145 | mid-layer probes are totally fabricated by this driver, | |
1146 | so new devices wouldn't show up. | |
1147 | ||
1148 | the scsi3addr's of devices won't change so long as the | |
1149 | adapter is not reset. That means we can rescan and | |
1150 | tell which devices we already know about, vs. new | |
1151 | devices, vs. disappearing devices. | |
1152 | ||
1153 | Also, if you yank out a tape drive, then put in a disk | |
1154 | in it's place, (say, a configured volume from another | |
1155 | array controller for instance) _don't_ poke this driver | |
1156 | (so it thinks it's still a tape, but _do_ poke the scsi | |
1157 | mid layer, so it does an inquiry... the scsi mid layer | |
1158 | will see the physical disk. This would be bad. Need to | |
1159 | think about how to prevent that. One idea would be to | |
1160 | snoop all scsi responses and if an inquiry repsonse comes | |
1161 | back that reports a disk, chuck it an return selection | |
1162 | timeout instead and adjust our table... Not sure i like | |
1163 | that though. | |
1164 | ||
1165 | */ | |
47922d06 MM |
1166 | #define OBDR_TAPE_INQ_SIZE 49 |
1167 | #define OBDR_TAPE_SIG "$DR-10" | |
1da177e4 | 1168 | ReportLunData_struct *ld_buff; |
47922d06 | 1169 | unsigned char *inq_buff; |
1da177e4 | 1170 | unsigned char scsi3addr[8]; |
1da177e4 LT |
1171 | __u32 num_luns=0; |
1172 | unsigned char *ch; | |
905bd78f | 1173 | struct cciss_scsi_dev_t *currentsd, *this_device; |
1da177e4 LT |
1174 | int ncurrent=0; |
1175 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1176 | int i; | |
1177 | ||
06ff37ff | 1178 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
47922d06 | 1179 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
905bd78f | 1180 | currentsd = kzalloc(sizeof(*currentsd) * |
1181 | (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); | |
1182 | if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { | |
1183 | printk(KERN_ERR "cciss: out of memory\n"); | |
1184 | goto out; | |
1da177e4 | 1185 | } |
905bd78f | 1186 | this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
f70dba83 | 1187 | if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) { |
1da177e4 LT |
1188 | ch = &ld_buff->LUNListLength[0]; |
1189 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1190 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1191 | printk(KERN_WARNING | |
1192 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1193 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1194 | num_luns - CISS_MAX_PHYS_LUN); | |
1195 | num_luns = CISS_MAX_PHYS_LUN; | |
1196 | } | |
1197 | } | |
1198 | else { | |
1199 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1200 | goto out; | |
1201 | } | |
1202 | ||
1203 | ||
1204 | /* adjust our table of devices */ | |
905bd78f | 1205 | for (i = 0; i < num_luns; i++) { |
1da177e4 LT |
1206 | /* for each physical lun, do an inquiry */ |
1207 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
47922d06 | 1208 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
1da177e4 LT |
1209 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
1210 | ||
f70dba83 | 1211 | if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, |
905bd78f | 1212 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) |
1da177e4 | 1213 | /* Inquiry failed (msg printed already) */ |
905bd78f | 1214 | continue; /* so we will skip this device. */ |
1215 | ||
1216 | this_device->devtype = (inq_buff[0] & 0x1f); | |
1217 | this_device->bus = -1; | |
1218 | this_device->target = -1; | |
1219 | this_device->lun = -1; | |
1220 | memcpy(this_device->scsi3addr, scsi3addr, 8); | |
1221 | memcpy(this_device->vendor, &inq_buff[8], | |
1222 | sizeof(this_device->vendor)); | |
1223 | memcpy(this_device->model, &inq_buff[16], | |
1224 | sizeof(this_device->model)); | |
1225 | memcpy(this_device->revision, &inq_buff[32], | |
1226 | sizeof(this_device->revision)); | |
1227 | memset(this_device->device_id, 0, | |
1228 | sizeof(this_device->device_id)); | |
f70dba83 | 1229 | cciss_scsi_get_device_id(h, scsi3addr, |
905bd78f | 1230 | this_device->device_id, sizeof(this_device->device_id)); |
1231 | ||
1232 | switch (this_device->devtype) | |
1da177e4 | 1233 | { |
47922d06 MM |
1234 | case 0x05: /* CD-ROM */ { |
1235 | ||
1236 | /* We don't *really* support actual CD-ROM devices, | |
1237 | * just this "One Button Disaster Recovery" tape drive | |
1238 | * which temporarily pretends to be a CD-ROM drive. | |
1239 | * So we check that the device is really an OBDR tape | |
1240 | * device by checking for "$DR-10" in bytes 43-48 of | |
1241 | * the inquiry data. | |
1242 | */ | |
1243 | char obdr_sig[7]; | |
1244 | ||
1245 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1246 | obdr_sig[6] = '\0'; | |
1247 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1248 | /* Not OBDR device, ignore it. */ | |
1249 | break; | |
1250 | } | |
1251 | /* fall through . . . */ | |
1da177e4 LT |
1252 | case 0x01: /* sequential access, (tape) */ |
1253 | case 0x08: /* medium changer */ | |
1254 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1255 | printk(KERN_INFO "cciss%d: %s ignored, " | |
f70dba83 | 1256 | "too many devices.\n", h->ctlr, |
905bd78f | 1257 | scsi_device_type(this_device->devtype)); |
1da177e4 LT |
1258 | break; |
1259 | } | |
905bd78f | 1260 | currentsd[ncurrent] = *this_device; |
1da177e4 LT |
1261 | ncurrent++; |
1262 | break; | |
1263 | default: | |
1264 | break; | |
1265 | } | |
1266 | } | |
1267 | ||
f70dba83 | 1268 | adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent); |
1da177e4 LT |
1269 | out: |
1270 | kfree(inq_buff); | |
1271 | kfree(ld_buff); | |
905bd78f | 1272 | kfree(currentsd); |
1da177e4 LT |
1273 | return; |
1274 | } | |
1275 | ||
1276 | static int | |
1277 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1278 | { | |
1279 | int verb_len = strlen(verb); | |
1280 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1281 | return verb_len; | |
1282 | else | |
1283 | return 0; | |
1284 | } | |
1285 | ||
1286 | static int | |
f70dba83 | 1287 | cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length) |
1da177e4 LT |
1288 | { |
1289 | int arg_len; | |
1290 | ||
1291 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
f70dba83 | 1292 | cciss_update_non_disk_devices(h, hostno); |
1da177e4 LT |
1293 | else |
1294 | return -EINVAL; | |
1295 | return length; | |
1296 | } | |
1297 | ||
1298 | ||
1299 | static int | |
1300 | cciss_scsi_proc_info(struct Scsi_Host *sh, | |
1301 | char *buffer, /* data buffer */ | |
1302 | char **start, /* where data in buffer starts */ | |
1303 | off_t offset, /* offset from start of imaginary file */ | |
1304 | int length, /* length of data in buffer */ | |
1305 | int func) /* 0 == read, 1 == write */ | |
1306 | { | |
1307 | ||
1308 | int buflen, datalen; | |
f70dba83 | 1309 | ctlr_info_t *h; |
b9f0bd08 | 1310 | int i; |
1da177e4 | 1311 | |
f70dba83 SC |
1312 | h = (ctlr_info_t *) sh->hostdata[0]; |
1313 | if (h == NULL) /* This really shouldn't ever happen. */ | |
1da177e4 LT |
1314 | return -EINVAL; |
1315 | ||
1da177e4 | 1316 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ |
b9f0bd08 | 1317 | buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", |
f70dba83 | 1318 | h->ctlr, sh->host_no); |
b9f0bd08 MM |
1319 | |
1320 | /* this information is needed by apps to know which cciss | |
1321 | device corresponds to which scsi host number without | |
1322 | having to open a scsi target device node. The device | |
1323 | information is not a duplicate of /proc/scsi/scsi because | |
1324 | the two may be out of sync due to scsi hotplug, rather | |
1325 | this info is for an app to be able to use to know how to | |
1326 | get them back in sync. */ | |
1327 | ||
f70dba83 SC |
1328 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { |
1329 | struct cciss_scsi_dev_t *sd = | |
1330 | &ccissscsi[h->ctlr].dev[i]; | |
b9f0bd08 MM |
1331 | buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " |
1332 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1333 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1334 | sd->devtype, | |
1335 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1336 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1337 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1338 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1339 | } | |
1da177e4 LT |
1340 | datalen = buflen - offset; |
1341 | if (datalen < 0) { /* they're reading past EOF. */ | |
1342 | datalen = 0; | |
1343 | *start = buffer+buflen; | |
1344 | } else | |
1345 | *start = buffer + offset; | |
1346 | return(datalen); | |
1347 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ | |
f70dba83 | 1348 | return cciss_scsi_user_command(h, sh->host_no, |
1da177e4 LT |
1349 | buffer, length); |
1350 | } | |
1351 | ||
1352 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1353 | dma mapping and fills in the scatter gather entries of the | |
f70dba83 | 1354 | cciss command, c. */ |
1da177e4 | 1355 | |
f70dba83 | 1356 | static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c, |
87c3a922 | 1357 | struct scsi_cmnd *cmd) |
1da177e4 | 1358 | { |
41ce639a FT |
1359 | unsigned int len; |
1360 | struct scatterlist *sg; | |
1da177e4 | 1361 | __u64 addr64; |
87c3a922 SC |
1362 | int request_nsgs, i, chained, sg_index; |
1363 | struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr; | |
1364 | SGDescriptor_struct *curr_sg; | |
1365 | ||
1366 | BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); | |
1367 | ||
1368 | chained = 0; | |
1369 | sg_index = 0; | |
f70dba83 | 1370 | curr_sg = c->SG; |
87c3a922 SC |
1371 | request_nsgs = scsi_dma_map(cmd); |
1372 | if (request_nsgs) { | |
1373 | scsi_for_each_sg(cmd, sg, request_nsgs, i) { | |
1374 | if (sg_index + 1 == h->max_cmd_sgentries && | |
1375 | !chained && request_nsgs - i > 1) { | |
1376 | chained = 1; | |
1377 | sg_index = 0; | |
f70dba83 | 1378 | curr_sg = sa->cmd_sg_list[c->cmdindex]; |
87c3a922 | 1379 | } |
41ce639a FT |
1380 | addr64 = (__u64) sg_dma_address(sg); |
1381 | len = sg_dma_len(sg); | |
87c3a922 SC |
1382 | curr_sg[sg_index].Addr.lower = |
1383 | (__u32) (addr64 & 0x0FFFFFFFFULL); | |
1384 | curr_sg[sg_index].Addr.upper = | |
1385 | (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); | |
1386 | curr_sg[sg_index].Len = len; | |
1387 | curr_sg[sg_index].Ext = 0; | |
1388 | ++sg_index; | |
1da177e4 | 1389 | } |
87c3a922 | 1390 | if (chained) |
f70dba83 SC |
1391 | cciss_map_sg_chain_block(h, c, |
1392 | sa->cmd_sg_list[c->cmdindex], | |
87c3a922 SC |
1393 | (request_nsgs - (h->max_cmd_sgentries - 1)) * |
1394 | sizeof(SGDescriptor_struct)); | |
41ce639a | 1395 | } |
87c3a922 SC |
1396 | /* track how many SG entries we are using */ |
1397 | if (request_nsgs > h->maxSG) | |
1398 | h->maxSG = request_nsgs; | |
f70dba83 | 1399 | c->Header.SGTotal = (__u8) request_nsgs + chained; |
87c3a922 | 1400 | if (request_nsgs > h->max_cmd_sgentries) |
f70dba83 | 1401 | c->Header.SGList = h->max_cmd_sgentries; |
87c3a922 | 1402 | else |
f70dba83 | 1403 | c->Header.SGList = c->Header.SGTotal; |
1da177e4 LT |
1404 | return; |
1405 | } | |
1406 | ||
1407 | ||
1408 | static int | |
f281233d | 1409 | cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
1da177e4 | 1410 | { |
f70dba83 SC |
1411 | ctlr_info_t *h; |
1412 | int rc; | |
1da177e4 | 1413 | unsigned char scsi3addr[8]; |
f70dba83 | 1414 | CommandList_struct *c; |
1da177e4 LT |
1415 | unsigned long flags; |
1416 | ||
1417 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1418 | // We violate cmd->host privacy here. (Is there another way?) | |
f70dba83 | 1419 | h = (ctlr_info_t *) cmd->device->host->hostdata[0]; |
1da177e4 | 1420 | |
f70dba83 | 1421 | rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id, |
1da177e4 LT |
1422 | cmd->device->lun, scsi3addr); |
1423 | if (rc != 0) { | |
1424 | /* the scsi nexus does not match any that we presented... */ | |
1425 | /* pretend to mid layer that we got selection timeout */ | |
1426 | cmd->result = DID_NO_CONNECT << 16; | |
1427 | done(cmd); | |
1428 | /* we might want to think about registering controller itself | |
1429 | as a processor device on the bus so sg binds to it. */ | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1da177e4 LT |
1433 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and |
1434 | see what the device thinks of it. */ | |
1435 | ||
f70dba83 SC |
1436 | spin_lock_irqsave(&h->lock, flags); |
1437 | c = scsi_cmd_alloc(h); | |
1438 | spin_unlock_irqrestore(&h->lock, flags); | |
1439 | if (c == NULL) { /* trouble... */ | |
b2a4a43d | 1440 | dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n"); |
1da177e4 LT |
1441 | /* FIXME: next 3 lines are -> BAD! <- */ |
1442 | cmd->result = DID_NO_CONNECT << 16; | |
1443 | done(cmd); | |
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | // Fill in the command list header | |
1448 | ||
1449 | cmd->scsi_done = done; // save this for use by completion code | |
1450 | ||
f70dba83 SC |
1451 | /* save c in case we have to abort it */ |
1452 | cmd->host_scribble = (unsigned char *) c; | |
1da177e4 | 1453 | |
f70dba83 SC |
1454 | c->cmd_type = CMD_SCSI; |
1455 | c->scsi_cmd = cmd; | |
1456 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
1457 | memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1458 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
1459 | |
1460 | // Fill in the request block... | |
1461 | ||
f70dba83 SC |
1462 | c->Request.Timeout = 0; |
1463 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); | |
1464 | BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); | |
1465 | c->Request.CDBLen = cmd->cmd_len; | |
1466 | memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1467 | c->Request.Type.Type = TYPE_CMD; | |
1468 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
1da177e4 LT |
1469 | switch(cmd->sc_data_direction) |
1470 | { | |
f70dba83 SC |
1471 | case DMA_TO_DEVICE: |
1472 | c->Request.Type.Direction = XFER_WRITE; | |
1473 | break; | |
1474 | case DMA_FROM_DEVICE: | |
1475 | c->Request.Type.Direction = XFER_READ; | |
1476 | break; | |
1477 | case DMA_NONE: | |
1478 | c->Request.Type.Direction = XFER_NONE; | |
1479 | break; | |
1da177e4 LT |
1480 | case DMA_BIDIRECTIONAL: |
1481 | // This can happen if a buggy application does a scsi passthru | |
1482 | // and sets both inlen and outlen to non-zero. ( see | |
1483 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1484 | ||
f70dba83 | 1485 | c->Request.Type.Direction = XFER_RSVD; |
1da177e4 LT |
1486 | // This is technically wrong, and cciss controllers should |
1487 | // reject it with CMD_INVALID, which is the most correct | |
1488 | // response, but non-fibre backends appear to let it | |
1489 | // slide by, and give the same results as if this field | |
1490 | // were set correctly. Either way is acceptable for | |
1491 | // our purposes here. | |
1492 | ||
1493 | break; | |
1494 | ||
1495 | default: | |
b2a4a43d | 1496 | dev_warn(&h->pdev->dev, "unknown data direction: %d\n", |
1da177e4 LT |
1497 | cmd->sc_data_direction); |
1498 | BUG(); | |
1499 | break; | |
1500 | } | |
f70dba83 SC |
1501 | cciss_scatter_gather(h, c, cmd); |
1502 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
1503 | /* the cmd'll come back via intr handler in complete_scsi_command() */ |
1504 | return 0; | |
1505 | } | |
1506 | ||
f281233d JG |
1507 | static DEF_SCSI_QCMD(cciss_scsi_queue_command) |
1508 | ||
f70dba83 | 1509 | static void cciss_unregister_scsi(ctlr_info_t *h) |
1da177e4 LT |
1510 | { |
1511 | struct cciss_scsi_adapter_data_t *sa; | |
1512 | struct cciss_scsi_cmd_stack_t *stk; | |
1513 | unsigned long flags; | |
1514 | ||
1515 | /* we are being forcibly unloaded, and may not refuse. */ | |
1516 | ||
f70dba83 SC |
1517 | spin_lock_irqsave(&h->lock, flags); |
1518 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1519 | stk = &sa->cmd_stack; |
1520 | ||
1521 | /* if we weren't ever actually registered, don't unregister */ | |
1522 | if (sa->registered) { | |
f70dba83 | 1523 | spin_unlock_irqrestore(&h->lock, flags); |
1da177e4 LT |
1524 | scsi_remove_host(sa->scsi_host); |
1525 | scsi_host_put(sa->scsi_host); | |
f70dba83 | 1526 | spin_lock_irqsave(&h->lock, flags); |
1da177e4 LT |
1527 | } |
1528 | ||
1529 | /* set scsi_host to NULL so our detect routine will | |
1530 | find us on register */ | |
1531 | sa->scsi_host = NULL; | |
f70dba83 SC |
1532 | spin_unlock_irqrestore(&h->lock, flags); |
1533 | scsi_cmd_stack_free(h); | |
1da177e4 | 1534 | kfree(sa); |
1da177e4 LT |
1535 | } |
1536 | ||
f70dba83 | 1537 | static int cciss_engage_scsi(ctlr_info_t *h) |
1da177e4 LT |
1538 | { |
1539 | struct cciss_scsi_adapter_data_t *sa; | |
1540 | struct cciss_scsi_cmd_stack_t *stk; | |
1541 | unsigned long flags; | |
1542 | ||
f70dba83 SC |
1543 | spin_lock_irqsave(&h->lock, flags); |
1544 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1545 | stk = &sa->cmd_stack; |
1546 | ||
f4a93bcd | 1547 | if (sa->registered) { |
b2a4a43d | 1548 | dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n"); |
f70dba83 | 1549 | spin_unlock_irqrestore(&h->lock, flags); |
8721c81f | 1550 | return -ENXIO; |
1da177e4 | 1551 | } |
f4a93bcd | 1552 | sa->registered = 1; |
f70dba83 SC |
1553 | spin_unlock_irqrestore(&h->lock, flags); |
1554 | cciss_update_non_disk_devices(h, -1); | |
1555 | cciss_scsi_detect(h); | |
1da177e4 LT |
1556 | return 0; |
1557 | } | |
1558 | ||
1559 | static void | |
f70dba83 | 1560 | cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h) |
1da177e4 LT |
1561 | { |
1562 | unsigned long flags; | |
1da177e4 | 1563 | |
f70dba83 | 1564 | CPQ_TAPE_LOCK(h, flags); |
89b6e743 | 1565 | seq_printf(seq, |
b9f0bd08 | 1566 | "Sequential access devices: %d\n\n", |
f70dba83 SC |
1567 | ccissscsi[h->ctlr].ndevices); |
1568 | CPQ_TAPE_UNLOCK(h, flags); | |
1da177e4 LT |
1569 | } |
1570 | ||
88f627ae SC |
1571 | static int wait_for_device_to_become_ready(ctlr_info_t *h, |
1572 | unsigned char lunaddr[]) | |
1573 | { | |
1574 | int rc; | |
1575 | int count = 0; | |
1576 | int waittime = HZ; | |
1577 | CommandList_struct *c; | |
1578 | ||
6b4d96b8 | 1579 | c = cmd_alloc(h); |
88f627ae | 1580 | if (!c) { |
b2a4a43d SC |
1581 | dev_warn(&h->pdev->dev, "out of memory in " |
1582 | "wait_for_device_to_become_ready.\n"); | |
88f627ae SC |
1583 | return IO_ERROR; |
1584 | } | |
1585 | ||
1586 | /* Send test unit ready until device ready, or give up. */ | |
1587 | while (count < 20) { | |
1588 | ||
1589 | /* Wait for a bit. do this first, because if we send | |
1590 | * the TUR right away, the reset will just abort it. | |
1591 | */ | |
40df6ae4 | 1592 | schedule_timeout_uninterruptible(waittime); |
88f627ae SC |
1593 | count++; |
1594 | ||
1595 | /* Increase wait time with each try, up to a point. */ | |
1596 | if (waittime < (HZ * 30)) | |
1597 | waittime = waittime * 2; | |
1598 | ||
1599 | /* Send the Test Unit Ready */ | |
f70dba83 | 1600 | rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0, |
88f627ae | 1601 | lunaddr, TYPE_CMD); |
85cc61ae | 1602 | if (rc == 0) |
1603 | rc = sendcmd_withirq_core(h, c, 0); | |
1604 | ||
1605 | (void) process_sendcmd_error(h, c); | |
88f627ae | 1606 | |
3969251b | 1607 | if (rc != 0) |
1608 | goto retry_tur; | |
88f627ae | 1609 | |
3969251b | 1610 | if (c->err_info->CommandStatus == CMD_SUCCESS) |
88f627ae SC |
1611 | break; |
1612 | ||
3969251b | 1613 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && |
1614 | c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { | |
1615 | if (c->err_info->SenseInfo[2] == NO_SENSE) | |
1616 | break; | |
1617 | if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { | |
1618 | unsigned char asc; | |
1619 | asc = c->err_info->SenseInfo[12]; | |
1620 | check_for_unit_attention(h, c); | |
1621 | if (asc == POWER_OR_RESET) | |
1622 | break; | |
1623 | } | |
1624 | } | |
1625 | retry_tur: | |
b2a4a43d | 1626 | dev_warn(&h->pdev->dev, "Waiting %d secs " |
88f627ae | 1627 | "for device to become ready.\n", |
b2a4a43d | 1628 | waittime / HZ); |
88f627ae SC |
1629 | rc = 1; /* device not ready. */ |
1630 | } | |
1631 | ||
1632 | if (rc) | |
b2a4a43d | 1633 | dev_warn(&h->pdev->dev, "giving up on device.\n"); |
88f627ae | 1634 | else |
b2a4a43d | 1635 | dev_warn(&h->pdev->dev, "device is ready.\n"); |
88f627ae | 1636 | |
6b4d96b8 | 1637 | cmd_free(h, c); |
88f627ae SC |
1638 | return rc; |
1639 | } | |
89b6e743 | 1640 | |
3da8b713 | 1641 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
1642 | * complaining. Doing a host- or bus-reset can't do anything good here. | |
1643 | * Despite what it might say in scsi_error.c, there may well be commands | |
1644 | * on the controller, as the cciss driver registers twice, once as a block | |
1645 | * device for the logical drives, and once as a scsi device, for any tape | |
1646 | * drives. So we know there are no commands out on the tape drives, but we | |
1647 | * don't know there are no commands on the controller, and it is likely | |
1648 | * that there probably are, as the cciss block device is most commonly used | |
1649 | * as a boot device (embedded controller on HP/Compaq systems.) | |
1650 | */ | |
1651 | ||
1652 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) | |
1653 | { | |
1654 | int rc; | |
1655 | CommandList_struct *cmd_in_trouble; | |
88f627ae | 1656 | unsigned char lunaddr[8]; |
f70dba83 | 1657 | ctlr_info_t *h; |
3da8b713 | 1658 | |
1659 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1660 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1661 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1662 | return FAILED; |
b2a4a43d | 1663 | dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n"); |
3da8b713 | 1664 | /* find the command that's giving us trouble */ |
1665 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; | |
88f627ae | 1666 | if (cmd_in_trouble == NULL) /* paranoia */ |
3da8b713 | 1667 | return FAILED; |
88f627ae | 1668 | memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); |
3da8b713 | 1669 | /* send a reset to the SCSI LUN which the command was sent to */ |
f70dba83 | 1670 | rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr, |
3da8b713 | 1671 | TYPE_MSG); |
f70dba83 | 1672 | if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0) |
3da8b713 | 1673 | return SUCCESS; |
b2a4a43d | 1674 | dev_warn(&h->pdev->dev, "resetting device failed.\n"); |
3da8b713 | 1675 | return FAILED; |
1676 | } | |
1677 | ||
1678 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) | |
1679 | { | |
1680 | int rc; | |
1681 | CommandList_struct *cmd_to_abort; | |
85cc61ae | 1682 | unsigned char lunaddr[8]; |
f70dba83 | 1683 | ctlr_info_t *h; |
3da8b713 | 1684 | |
1685 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1686 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1687 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1688 | return FAILED; |
b2a4a43d | 1689 | dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n"); |
3da8b713 | 1690 | |
1691 | /* find the command to be aborted */ | |
1692 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; | |
1693 | if (cmd_to_abort == NULL) /* paranoia */ | |
1694 | return FAILED; | |
85cc61ae | 1695 | memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); |
f70dba83 | 1696 | rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag, |
85cc61ae | 1697 | 0, 0, lunaddr, TYPE_MSG); |
3da8b713 | 1698 | if (rc == 0) |
1699 | return SUCCESS; | |
1700 | return FAILED; | |
1701 | ||
1702 | } | |
1703 | ||
1da177e4 LT |
1704 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
1705 | ||
1706 | /* If no tape support, then these become defined out of existence */ | |
1707 | ||
1708 | #define cciss_scsi_setup(cntl_num) | |
1da177e4 LT |
1709 | |
1710 | #endif /* CONFIG_CISS_SCSI_TAPE */ |