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 | ||
60063497 | 36 | #include <linux/atomic.h> |
4e57b681 | 37 | |
1da177e4 LT |
38 | #include <scsi/scsi_cmnd.h> |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_host.h> | |
1da177e4 LT |
41 | |
42 | #include "cciss_scsi.h" | |
43 | ||
3da8b713 | 44 | #define CCISS_ABORT_MSG 0x00 |
45 | #define CCISS_RESET_MSG 0x01 | |
46 | ||
f70dba83 | 47 | static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff, |
88f627ae | 48 | size_t size, |
b57695fe | 49 | __u8 page_code, unsigned char *scsi3addr, |
88f627ae SC |
50 | int cmd_type); |
51 | ||
6b4d96b8 SC |
52 | static CommandList_struct *cmd_alloc(ctlr_info_t *h); |
53 | static CommandList_struct *cmd_special_alloc(ctlr_info_t *h); | |
54 | static void cmd_free(ctlr_info_t *h, CommandList_struct *c); | |
55 | static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c); | |
1da177e4 | 56 | |
e88b7bb0 | 57 | static int cciss_scsi_write_info(struct Scsi_Host *sh, |
1da177e4 | 58 | char *buffer, /* data buffer */ |
e88b7bb0 AV |
59 | int length); /* length of data in buffer */ |
60 | static int cciss_scsi_show_info(struct seq_file *m, | |
61 | struct Scsi_Host *sh); | |
1da177e4 | 62 | |
f281233d JG |
63 | static int cciss_scsi_queue_command (struct Scsi_Host *h, |
64 | struct scsi_cmnd *cmd); | |
3da8b713 | 65 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *); |
66 | static int cciss_eh_abort_handler(struct scsi_cmnd *); | |
1da177e4 LT |
67 | |
68 | static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { | |
69 | { .name = "cciss0", .ndevices = 0 }, | |
70 | { .name = "cciss1", .ndevices = 0 }, | |
71 | { .name = "cciss2", .ndevices = 0 }, | |
72 | { .name = "cciss3", .ndevices = 0 }, | |
73 | { .name = "cciss4", .ndevices = 0 }, | |
74 | { .name = "cciss5", .ndevices = 0 }, | |
75 | { .name = "cciss6", .ndevices = 0 }, | |
76 | { .name = "cciss7", .ndevices = 0 }, | |
77 | }; | |
78 | ||
79 | static struct scsi_host_template cciss_driver_template = { | |
80 | .module = THIS_MODULE, | |
81 | .name = "cciss", | |
82 | .proc_name = "cciss", | |
e88b7bb0 AV |
83 | .write_info = cciss_scsi_write_info, |
84 | .show_info = cciss_scsi_show_info, | |
1da177e4 | 85 | .queuecommand = cciss_scsi_queue_command, |
1da177e4 | 86 | .this_id = 7, |
1da177e4 LT |
87 | .cmd_per_lun = 1, |
88 | .use_clustering = DISABLE_CLUSTERING, | |
3da8b713 | 89 | /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ |
90 | .eh_device_reset_handler= cciss_eh_device_reset_handler, | |
91 | .eh_abort_handler = cciss_eh_abort_handler, | |
1da177e4 LT |
92 | }; |
93 | ||
94 | #pragma pack(1) | |
1b7d0d28 | 95 | |
5e216153 MM |
96 | #define SCSI_PAD_32 8 |
97 | #define SCSI_PAD_64 8 | |
1b7d0d28 | 98 | |
1da177e4 LT |
99 | struct cciss_scsi_cmd_stack_elem_t { |
100 | CommandList_struct cmd; | |
101 | ErrorInfo_struct Err; | |
102 | __u32 busaddr; | |
87c3a922 | 103 | int cmdindex; |
1b7d0d28 | 104 | u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64]; |
1da177e4 LT |
105 | }; |
106 | ||
107 | #pragma pack() | |
108 | ||
1da177e4 LT |
109 | #pragma pack(1) |
110 | struct cciss_scsi_cmd_stack_t { | |
111 | struct cciss_scsi_cmd_stack_elem_t *pool; | |
8a4ec67b | 112 | struct cciss_scsi_cmd_stack_elem_t **elem; |
1da177e4 LT |
113 | dma_addr_t cmd_pool_handle; |
114 | int top; | |
8a4ec67b | 115 | int nelems; |
1da177e4 LT |
116 | }; |
117 | #pragma pack() | |
118 | ||
119 | struct cciss_scsi_adapter_data_t { | |
120 | struct Scsi_Host *scsi_host; | |
121 | struct cciss_scsi_cmd_stack_t cmd_stack; | |
87c3a922 | 122 | SGDescriptor_struct **cmd_sg_list; |
1da177e4 LT |
123 | int registered; |
124 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
125 | }; | |
126 | ||
f70dba83 SC |
127 | #define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \ |
128 | &h->scsi_ctlr->lock, flags); | |
129 | #define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \ | |
130 | &h->scsi_ctlr->lock, flags); | |
1da177e4 LT |
131 | |
132 | static CommandList_struct * | |
133 | scsi_cmd_alloc(ctlr_info_t *h) | |
134 | { | |
135 | /* assume only one process in here at a time, locking done by caller. */ | |
f70dba83 | 136 | /* use h->lock */ |
1da177e4 LT |
137 | /* might be better to rewrite how we allocate scsi commands in a way that */ |
138 | /* needs no locking at all. */ | |
139 | ||
140 | /* take the top memory chunk off the stack and return it, if any. */ | |
141 | struct cciss_scsi_cmd_stack_elem_t *c; | |
142 | struct cciss_scsi_adapter_data_t *sa; | |
143 | struct cciss_scsi_cmd_stack_t *stk; | |
144 | u64bit temp64; | |
145 | ||
aad9fb6f | 146 | sa = h->scsi_ctlr; |
1da177e4 LT |
147 | stk = &sa->cmd_stack; |
148 | ||
149 | if (stk->top < 0) | |
150 | return NULL; | |
151 | c = stk->elem[stk->top]; | |
152 | /* memset(c, 0, sizeof(*c)); */ | |
153 | memset(&c->cmd, 0, sizeof(c->cmd)); | |
154 | memset(&c->Err, 0, sizeof(c->Err)); | |
155 | /* set physical addr of cmd and addr of scsi parameters */ | |
156 | c->cmd.busaddr = c->busaddr; | |
87c3a922 | 157 | c->cmd.cmdindex = c->cmdindex; |
1da177e4 LT |
158 | /* (__u32) (stk->cmd_pool_handle + |
159 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ | |
160 | ||
161 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); | |
162 | /* (__u64) (stk->cmd_pool_handle + | |
163 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + | |
164 | sizeof(CommandList_struct)); */ | |
165 | stk->top--; | |
166 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; | |
167 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; | |
168 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); | |
169 | ||
170 | c->cmd.ctlr = h->ctlr; | |
171 | c->cmd.err_info = &c->Err; | |
172 | ||
173 | return (CommandList_struct *) c; | |
174 | } | |
175 | ||
176 | static void | |
f70dba83 | 177 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
178 | { |
179 | /* assume only one process in here at a time, locking done by caller. */ | |
f70dba83 | 180 | /* use h->lock */ |
1da177e4 LT |
181 | /* drop the free memory chunk on top of the stack. */ |
182 | ||
183 | struct cciss_scsi_adapter_data_t *sa; | |
184 | struct cciss_scsi_cmd_stack_t *stk; | |
185 | ||
aad9fb6f | 186 | sa = h->scsi_ctlr; |
1da177e4 | 187 | stk = &sa->cmd_stack; |
713b6864 | 188 | stk->top++; |
8a4ec67b | 189 | if (stk->top >= stk->nelems) { |
b2a4a43d SC |
190 | dev_err(&h->pdev->dev, |
191 | "scsi_cmd_free called too many times.\n"); | |
1da177e4 LT |
192 | BUG(); |
193 | } | |
f70dba83 | 194 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c; |
1da177e4 LT |
195 | } |
196 | ||
197 | static int | |
f70dba83 | 198 | scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa) |
1da177e4 LT |
199 | { |
200 | int i; | |
201 | struct cciss_scsi_cmd_stack_t *stk; | |
202 | size_t size; | |
203 | ||
8a4ec67b SC |
204 | stk = &sa->cmd_stack; |
205 | stk->nelems = cciss_tape_cmds + 2; | |
f70dba83 | 206 | sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, |
8a4ec67b | 207 | h->chainsize, stk->nelems); |
f70dba83 | 208 | if (!sa->cmd_sg_list && h->chainsize > 0) |
87c3a922 SC |
209 | return -ENOMEM; |
210 | ||
8a4ec67b | 211 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems; |
1da177e4 | 212 | |
1b7d0d28 SC |
213 | /* Check alignment, see cciss_cmd.h near CommandList_struct def. */ |
214 | BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0); | |
215 | /* pci_alloc_consistent guarantees 32-bit DMA address will be used */ | |
1da177e4 | 216 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) |
f70dba83 | 217 | pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle); |
1da177e4 LT |
218 | |
219 | if (stk->pool == NULL) { | |
8a4ec67b | 220 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems); |
87c3a922 SC |
221 | sa->cmd_sg_list = NULL; |
222 | return -ENOMEM; | |
1da177e4 | 223 | } |
8a4ec67b SC |
224 | stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL); |
225 | if (!stk->elem) { | |
226 | pci_free_consistent(h->pdev, size, stk->pool, | |
227 | stk->cmd_pool_handle); | |
228 | return -1; | |
229 | } | |
230 | for (i = 0; i < stk->nelems; i++) { | |
1da177e4 LT |
231 | stk->elem[i] = &stk->pool[i]; |
232 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
233 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
87c3a922 | 234 | stk->elem[i]->cmdindex = i; |
1da177e4 | 235 | } |
8a4ec67b | 236 | stk->top = stk->nelems-1; |
1da177e4 LT |
237 | return 0; |
238 | } | |
239 | ||
240 | static void | |
f70dba83 | 241 | scsi_cmd_stack_free(ctlr_info_t *h) |
1da177e4 LT |
242 | { |
243 | struct cciss_scsi_adapter_data_t *sa; | |
244 | struct cciss_scsi_cmd_stack_t *stk; | |
245 | size_t size; | |
246 | ||
f70dba83 | 247 | sa = h->scsi_ctlr; |
1da177e4 | 248 | stk = &sa->cmd_stack; |
8a4ec67b | 249 | if (stk->top != stk->nelems-1) { |
b2a4a43d SC |
250 | dev_warn(&h->pdev->dev, |
251 | "bug: %d scsi commands are still outstanding.\n", | |
8a4ec67b | 252 | stk->nelems - stk->top); |
1da177e4 | 253 | } |
8a4ec67b | 254 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems; |
1da177e4 | 255 | |
f70dba83 | 256 | pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle); |
1da177e4 | 257 | stk->pool = NULL; |
8a4ec67b SC |
258 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems); |
259 | kfree(stk->elem); | |
260 | stk->elem = NULL; | |
1da177e4 LT |
261 | } |
262 | ||
400bb236 | 263 | #if 0 |
1da177e4 LT |
264 | static int xmargin=8; |
265 | static int amargin=60; | |
266 | ||
267 | static void | |
268 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
269 | { | |
270 | ||
271 | int i; | |
272 | unsigned char *x; | |
273 | ||
274 | if (hex) | |
275 | { | |
276 | x = c; | |
277 | for (i=0;i<len;i++) | |
278 | { | |
279 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
280 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
281 | printk(" %02x", *x); | |
282 | x++; | |
283 | } | |
284 | printk("\n"); | |
285 | } | |
286 | if (ascii) | |
287 | { | |
288 | x = c; | |
289 | for (i=0;i<len;i++) | |
290 | { | |
291 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
292 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
293 | if (*x > 26 && *x < 128) printk("%c", *x); | |
294 | else printk("."); | |
295 | x++; | |
296 | } | |
297 | printk("\n"); | |
298 | } | |
299 | } | |
300 | ||
301 | static void | |
302 | print_cmd(CommandList_struct *cp) | |
303 | { | |
304 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
305 | printk("sglist:%d\n", cp->Header.SGList); | |
306 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
307 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
308 | cp->Header.Tag.lower); | |
309 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
310 | cp->Header.LUN.LunAddrBytes[0], | |
311 | cp->Header.LUN.LunAddrBytes[1], | |
312 | cp->Header.LUN.LunAddrBytes[2], | |
313 | cp->Header.LUN.LunAddrBytes[3], | |
314 | cp->Header.LUN.LunAddrBytes[4], | |
315 | cp->Header.LUN.LunAddrBytes[5], | |
316 | cp->Header.LUN.LunAddrBytes[6], | |
317 | cp->Header.LUN.LunAddrBytes[7]); | |
318 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
319 | printk("Type:%d\n",cp->Request.Type.Type); | |
320 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
321 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
322 | printk("Timeout:%d\n",cp->Request.Timeout); | |
323 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
324 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
325 | cp->Request.CDB[0], cp->Request.CDB[1], | |
326 | cp->Request.CDB[2], cp->Request.CDB[3], | |
327 | cp->Request.CDB[4], cp->Request.CDB[5], | |
328 | cp->Request.CDB[6], cp->Request.CDB[7], | |
329 | cp->Request.CDB[8], cp->Request.CDB[9], | |
330 | cp->Request.CDB[10], cp->Request.CDB[11], | |
331 | cp->Request.CDB[12], cp->Request.CDB[13], | |
332 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
333 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
334 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
335 | cp->ErrDesc.Len); | |
336 | printk("sgs..........Errorinfo:\n"); | |
337 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
338 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
339 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
340 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
341 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
342 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
343 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
344 | ||
345 | } | |
346 | ||
347 | #endif | |
348 | ||
349 | static int | |
f70dba83 | 350 | find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun) |
1da177e4 LT |
351 | { |
352 | /* finds an unused bus, target, lun for a new device */ | |
f70dba83 | 353 | /* assumes h->scsi_ctlr->lock is held */ |
1da177e4 LT |
354 | int i, found=0; |
355 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
356 | ||
357 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
358 | ||
359 | target_taken[SELF_SCSI_ID] = 1; | |
f70dba83 SC |
360 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) |
361 | target_taken[ccissscsi[h->ctlr].dev[i].target] = 1; | |
1da177e4 | 362 | |
f70dba83 | 363 | for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) { |
1da177e4 LT |
364 | if (!target_taken[i]) { |
365 | *bus = 0; *target=i; *lun = 0; found=1; | |
366 | break; | |
367 | } | |
368 | } | |
369 | return (!found); | |
370 | } | |
f4a93bcd MM |
371 | struct scsi2map { |
372 | char scsi3addr[8]; | |
373 | int bus, target, lun; | |
374 | }; | |
1da177e4 LT |
375 | |
376 | static int | |
f70dba83 | 377 | cciss_scsi_add_entry(ctlr_info_t *h, int hostno, |
905bd78f | 378 | struct cciss_scsi_dev_t *device, |
f4a93bcd | 379 | struct scsi2map *added, int *nadded) |
1da177e4 | 380 | { |
f70dba83 SC |
381 | /* assumes h->scsi_ctlr->lock is held */ |
382 | int n = ccissscsi[h->ctlr].ndevices; | |
1da177e4 | 383 | struct cciss_scsi_dev_t *sd; |
935dc8d7 MM |
384 | int i, bus, target, lun; |
385 | unsigned char addr1[8], addr2[8]; | |
1da177e4 LT |
386 | |
387 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
b2a4a43d SC |
388 | dev_warn(&h->pdev->dev, "Too many devices, " |
389 | "some will be inaccessible.\n"); | |
1da177e4 LT |
390 | return -1; |
391 | } | |
f4a93bcd | 392 | |
935dc8d7 MM |
393 | bus = target = -1; |
394 | lun = 0; | |
395 | /* Is this device a non-zero lun of a multi-lun device */ | |
396 | /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ | |
905bd78f | 397 | if (device->scsi3addr[4] != 0) { |
935dc8d7 MM |
398 | /* Search through our list and find the device which */ |
399 | /* has the same 8 byte LUN address, excepting byte 4. */ | |
400 | /* Assign the same bus and target for this new LUN. */ | |
401 | /* Use the logical unit number from the firmware. */ | |
905bd78f | 402 | memcpy(addr1, device->scsi3addr, 8); |
935dc8d7 MM |
403 | addr1[4] = 0; |
404 | for (i = 0; i < n; i++) { | |
f70dba83 | 405 | sd = &ccissscsi[h->ctlr].dev[i]; |
935dc8d7 MM |
406 | memcpy(addr2, sd->scsi3addr, 8); |
407 | addr2[4] = 0; | |
408 | /* differ only in byte 4? */ | |
409 | if (memcmp(addr1, addr2, 8) == 0) { | |
410 | bus = sd->bus; | |
411 | target = sd->target; | |
905bd78f | 412 | lun = device->scsi3addr[4]; |
935dc8d7 MM |
413 | break; |
414 | } | |
415 | } | |
416 | } | |
417 | ||
f70dba83 | 418 | sd = &ccissscsi[h->ctlr].dev[n]; |
935dc8d7 | 419 | if (lun == 0) { |
f70dba83 | 420 | if (find_bus_target_lun(h, |
935dc8d7 MM |
421 | &sd->bus, &sd->target, &sd->lun) != 0) |
422 | return -1; | |
423 | } else { | |
424 | sd->bus = bus; | |
425 | sd->target = target; | |
426 | sd->lun = lun; | |
427 | } | |
f4a93bcd MM |
428 | added[*nadded].bus = sd->bus; |
429 | added[*nadded].target = sd->target; | |
430 | added[*nadded].lun = sd->lun; | |
431 | (*nadded)++; | |
432 | ||
905bd78f | 433 | memcpy(sd->scsi3addr, device->scsi3addr, 8); |
434 | memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); | |
435 | memcpy(sd->revision, device->revision, sizeof(sd->revision)); | |
436 | memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); | |
437 | sd->devtype = device->devtype; | |
438 | ||
f70dba83 | 439 | ccissscsi[h->ctlr].ndevices++; |
1da177e4 LT |
440 | |
441 | /* initially, (before registering with scsi layer) we don't | |
442 | know our hostno and we don't want to print anything first | |
443 | time anyway (the scsi layer's inquiries will show that info) */ | |
444 | if (hostno != -1) | |
b2a4a43d SC |
445 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n", |
446 | scsi_device_type(sd->devtype), hostno, | |
1da177e4 LT |
447 | sd->bus, sd->target, sd->lun); |
448 | return 0; | |
449 | } | |
450 | ||
451 | static void | |
f70dba83 | 452 | cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry, |
f4a93bcd | 453 | struct scsi2map *removed, int *nremoved) |
1da177e4 | 454 | { |
f70dba83 | 455 | /* assumes h->ctlr]->scsi_ctlr->lock is held */ |
1da177e4 LT |
456 | int i; |
457 | struct cciss_scsi_dev_t sd; | |
458 | ||
459 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
f70dba83 | 460 | sd = ccissscsi[h->ctlr].dev[entry]; |
f4a93bcd MM |
461 | removed[*nremoved].bus = sd.bus; |
462 | removed[*nremoved].target = sd.target; | |
463 | removed[*nremoved].lun = sd.lun; | |
464 | (*nremoved)++; | |
f70dba83 SC |
465 | for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++) |
466 | ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1]; | |
467 | ccissscsi[h->ctlr].ndevices--; | |
b2a4a43d SC |
468 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n", |
469 | scsi_device_type(sd.devtype), hostno, | |
1da177e4 LT |
470 | sd.bus, sd.target, sd.lun); |
471 | } | |
472 | ||
473 | ||
474 | #define SCSI3ADDR_EQ(a,b) ( \ | |
475 | (a)[7] == (b)[7] && \ | |
476 | (a)[6] == (b)[6] && \ | |
477 | (a)[5] == (b)[5] && \ | |
478 | (a)[4] == (b)[4] && \ | |
479 | (a)[3] == (b)[3] && \ | |
480 | (a)[2] == (b)[2] && \ | |
481 | (a)[1] == (b)[1] && \ | |
482 | (a)[0] == (b)[0]) | |
483 | ||
f70dba83 | 484 | static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr) |
f4a93bcd MM |
485 | { |
486 | /* called when scsi_add_device fails in order to re-adjust */ | |
487 | /* ccissscsi[] to match the mid layer's view. */ | |
488 | unsigned long flags; | |
489 | int i, j; | |
f70dba83 SC |
490 | CPQ_TAPE_LOCK(h, flags); |
491 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
f4a93bcd | 492 | if (memcmp(scsi3addr, |
f70dba83 SC |
493 | ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) { |
494 | for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++) | |
495 | ccissscsi[h->ctlr].dev[j] = | |
496 | ccissscsi[h->ctlr].dev[j+1]; | |
497 | ccissscsi[h->ctlr].ndevices--; | |
f4a93bcd MM |
498 | break; |
499 | } | |
500 | } | |
f70dba83 | 501 | CPQ_TAPE_UNLOCK(h, flags); |
f4a93bcd MM |
502 | } |
503 | ||
905bd78f | 504 | static int device_is_the_same(struct cciss_scsi_dev_t *dev1, |
505 | struct cciss_scsi_dev_t *dev2) | |
506 | { | |
507 | return dev1->devtype == dev2->devtype && | |
508 | memcmp(dev1->scsi3addr, dev2->scsi3addr, | |
509 | sizeof(dev1->scsi3addr)) == 0 && | |
510 | memcmp(dev1->device_id, dev2->device_id, | |
511 | sizeof(dev1->device_id)) == 0 && | |
512 | memcmp(dev1->vendor, dev2->vendor, | |
513 | sizeof(dev1->vendor)) == 0 && | |
514 | memcmp(dev1->model, dev2->model, | |
515 | sizeof(dev1->model)) == 0 && | |
516 | memcmp(dev1->revision, dev2->revision, | |
517 | sizeof(dev1->revision)) == 0; | |
518 | } | |
519 | ||
1da177e4 | 520 | static int |
f70dba83 | 521 | adjust_cciss_scsi_table(ctlr_info_t *h, int hostno, |
1da177e4 LT |
522 | struct cciss_scsi_dev_t sd[], int nsds) |
523 | { | |
524 | /* sd contains scsi3 addresses and devtypes, but | |
525 | bus target and lun are not filled in. This funciton | |
526 | takes what's in sd to be the current and adjusts | |
527 | ccissscsi[] to be in line with what's in sd. */ | |
528 | ||
529 | int i,j, found, changes=0; | |
530 | struct cciss_scsi_dev_t *csd; | |
531 | unsigned long flags; | |
f4a93bcd MM |
532 | struct scsi2map *added, *removed; |
533 | int nadded, nremoved; | |
534 | struct Scsi_Host *sh = NULL; | |
535 | ||
536 | added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
537 | GFP_KERNEL); | |
538 | removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
539 | GFP_KERNEL); | |
540 | ||
541 | if (!added || !removed) { | |
b2a4a43d SC |
542 | dev_warn(&h->pdev->dev, |
543 | "Out of memory in adjust_cciss_scsi_table\n"); | |
f4a93bcd MM |
544 | goto free_and_out; |
545 | } | |
1da177e4 | 546 | |
f70dba83 | 547 | CPQ_TAPE_LOCK(h, flags); |
1da177e4 | 548 | |
f4a93bcd | 549 | if (hostno != -1) /* if it's not the first time... */ |
f70dba83 | 550 | sh = h->scsi_ctlr->scsi_host; |
f4a93bcd | 551 | |
1da177e4 LT |
552 | /* find any devices in ccissscsi[] that are not in |
553 | sd[] and remove them from ccissscsi[] */ | |
554 | ||
555 | i = 0; | |
f4a93bcd MM |
556 | nremoved = 0; |
557 | nadded = 0; | |
f70dba83 SC |
558 | while (i < ccissscsi[h->ctlr].ndevices) { |
559 | csd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
560 | found=0; |
561 | for (j=0;j<nsds;j++) { | |
562 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
563 | csd->scsi3addr)) { | |
905bd78f | 564 | if (device_is_the_same(&sd[j], csd)) |
1da177e4 LT |
565 | found=2; |
566 | else | |
567 | found=1; | |
568 | break; | |
569 | } | |
570 | } | |
571 | ||
572 | if (found == 0) { /* device no longer present. */ | |
573 | changes++; | |
f70dba83 | 574 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
575 | removed, &nremoved); |
576 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 577 | } else if (found == 1) { /* device is different in some way */ |
1da177e4 | 578 | changes++; |
b2a4a43d SC |
579 | dev_info(&h->pdev->dev, |
580 | "device c%db%dt%dl%d has changed.\n", | |
581 | hostno, csd->bus, csd->target, csd->lun); | |
f70dba83 | 582 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
583 | removed, &nremoved); |
584 | /* remove ^^^, hence i not incremented */ | |
f70dba83 | 585 | if (cciss_scsi_add_entry(h, hostno, &sd[j], |
f4a93bcd MM |
586 | added, &nadded) != 0) |
587 | /* we just removed one, so add can't fail. */ | |
588 | BUG(); | |
1da177e4 | 589 | csd->devtype = sd[j].devtype; |
905bd78f | 590 | memcpy(csd->device_id, sd[j].device_id, |
591 | sizeof(csd->device_id)); | |
592 | memcpy(csd->vendor, sd[j].vendor, | |
593 | sizeof(csd->vendor)); | |
594 | memcpy(csd->model, sd[j].model, | |
595 | sizeof(csd->model)); | |
596 | memcpy(csd->revision, sd[j].revision, | |
597 | sizeof(csd->revision)); | |
1da177e4 LT |
598 | } else /* device is same as it ever was, */ |
599 | i++; /* so just move along. */ | |
600 | } | |
601 | ||
602 | /* Now, make sure every device listed in sd[] is also | |
603 | listed in ccissscsi[], adding them if they aren't found */ | |
604 | ||
605 | for (i=0;i<nsds;i++) { | |
606 | found=0; | |
f70dba83 SC |
607 | for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) { |
608 | csd = &ccissscsi[h->ctlr].dev[j]; | |
1da177e4 LT |
609 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, |
610 | csd->scsi3addr)) { | |
905bd78f | 611 | if (device_is_the_same(&sd[i], csd)) |
1da177e4 LT |
612 | found=2; /* found device */ |
613 | else | |
614 | found=1; /* found a bug. */ | |
615 | break; | |
616 | } | |
617 | } | |
618 | if (!found) { | |
619 | changes++; | |
f70dba83 | 620 | if (cciss_scsi_add_entry(h, hostno, &sd[i], |
f4a93bcd | 621 | added, &nadded) != 0) |
1da177e4 LT |
622 | break; |
623 | } else if (found == 1) { | |
624 | /* should never happen... */ | |
625 | changes++; | |
b2a4a43d SC |
626 | dev_warn(&h->pdev->dev, |
627 | "device unexpectedly changed\n"); | |
1da177e4 LT |
628 | /* but if it does happen, we just ignore that device */ |
629 | } | |
630 | } | |
f70dba83 | 631 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 | 632 | |
f4a93bcd MM |
633 | /* Don't notify scsi mid layer of any changes the first time through */ |
634 | /* (or if there are no changes) scsi_scan_host will do it later the */ | |
635 | /* first time through. */ | |
636 | if (hostno == -1 || !changes) | |
637 | goto free_and_out; | |
638 | ||
639 | /* Notify scsi mid layer of any removed devices */ | |
640 | for (i = 0; i < nremoved; i++) { | |
641 | struct scsi_device *sdev = | |
642 | scsi_device_lookup(sh, removed[i].bus, | |
643 | removed[i].target, removed[i].lun); | |
644 | if (sdev != NULL) { | |
645 | scsi_remove_device(sdev); | |
646 | scsi_device_put(sdev); | |
647 | } else { | |
648 | /* We don't expect to get here. */ | |
649 | /* future cmds to this device will get selection */ | |
650 | /* timeout as if the device was gone. */ | |
b2a4a43d | 651 | dev_warn(&h->pdev->dev, "didn't find " |
f4a93bcd | 652 | "c%db%dt%dl%d\n for removal.", |
b2a4a43d | 653 | hostno, removed[i].bus, |
f4a93bcd MM |
654 | removed[i].target, removed[i].lun); |
655 | } | |
656 | } | |
657 | ||
658 | /* Notify scsi mid layer of any added devices */ | |
659 | for (i = 0; i < nadded; i++) { | |
660 | int rc; | |
661 | rc = scsi_add_device(sh, added[i].bus, | |
662 | added[i].target, added[i].lun); | |
663 | if (rc == 0) | |
664 | continue; | |
b2a4a43d | 665 | dev_warn(&h->pdev->dev, "scsi_add_device " |
f4a93bcd | 666 | "c%db%dt%dl%d failed, device not added.\n", |
b2a4a43d | 667 | hostno, added[i].bus, added[i].target, added[i].lun); |
f4a93bcd MM |
668 | /* now we have to remove it from ccissscsi, */ |
669 | /* since it didn't get added to scsi mid layer */ | |
f70dba83 | 670 | fixup_botched_add(h, added[i].scsi3addr); |
f4a93bcd | 671 | } |
1da177e4 | 672 | |
f4a93bcd MM |
673 | free_and_out: |
674 | kfree(added); | |
675 | kfree(removed); | |
1da177e4 LT |
676 | return 0; |
677 | } | |
678 | ||
679 | static int | |
f70dba83 | 680 | lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr) |
1da177e4 LT |
681 | { |
682 | int i; | |
683 | struct cciss_scsi_dev_t *sd; | |
684 | unsigned long flags; | |
685 | ||
f70dba83 SC |
686 | CPQ_TAPE_LOCK(h, flags); |
687 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
688 | sd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
689 | if (sd->bus == bus && |
690 | sd->target == target && | |
691 | sd->lun == lun) { | |
692 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
f70dba83 | 693 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
694 | return 0; |
695 | } | |
696 | } | |
f70dba83 | 697 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
698 | return -1; |
699 | } | |
700 | ||
701 | static void | |
f70dba83 | 702 | cciss_scsi_setup(ctlr_info_t *h) |
1da177e4 LT |
703 | { |
704 | struct cciss_scsi_adapter_data_t * shba; | |
705 | ||
f70dba83 | 706 | ccissscsi[h->ctlr].ndevices = 0; |
1da177e4 LT |
707 | shba = (struct cciss_scsi_adapter_data_t *) |
708 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
709 | if (shba == NULL) | |
710 | return; | |
711 | shba->scsi_host = NULL; | |
712 | spin_lock_init(&shba->lock); | |
713 | shba->registered = 0; | |
f70dba83 | 714 | if (scsi_cmd_stack_setup(h, shba) != 0) { |
1da177e4 LT |
715 | kfree(shba); |
716 | shba = NULL; | |
717 | } | |
f70dba83 | 718 | h->scsi_ctlr = shba; |
1da177e4 LT |
719 | return; |
720 | } | |
721 | ||
f70dba83 SC |
722 | static void complete_scsi_command(CommandList_struct *c, int timeout, |
723 | __u32 tag) | |
1da177e4 LT |
724 | { |
725 | struct scsi_cmnd *cmd; | |
f70dba83 | 726 | ctlr_info_t *h; |
1da177e4 LT |
727 | ErrorInfo_struct *ei; |
728 | ||
f70dba83 | 729 | ei = c->err_info; |
1da177e4 LT |
730 | |
731 | /* First, see if it was a message rather than a command */ | |
f70dba83 SC |
732 | if (c->Request.Type.Type == TYPE_MSG) { |
733 | c->cmd_type = CMD_MSG_DONE; | |
1da177e4 LT |
734 | return; |
735 | } | |
736 | ||
f70dba83 SC |
737 | cmd = (struct scsi_cmnd *) c->scsi_cmd; |
738 | h = hba[c->ctlr]; | |
1da177e4 | 739 | |
41ce639a | 740 | scsi_dma_unmap(cmd); |
f70dba83 SC |
741 | if (c->Header.SGTotal > h->max_cmd_sgentries) |
742 | cciss_unmap_sg_chain_block(h, c); | |
1da177e4 LT |
743 | |
744 | cmd->result = (DID_OK << 16); /* host byte */ | |
745 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
746 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
747 | ||
748 | cmd->result |= (ei->ScsiStatus); | |
749 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
750 | ||
751 | /* copy the sense data whether we need to or not. */ | |
752 | ||
753 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
754 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
755 | SCSI_SENSE_BUFFERSIZE : | |
756 | ei->SenseLen); | |
41ce639a | 757 | scsi_set_resid(cmd, ei->ResidualCnt); |
1da177e4 LT |
758 | |
759 | if(ei->CommandStatus != 0) | |
760 | { /* an error has occurred */ | |
761 | switch(ei->CommandStatus) | |
762 | { | |
763 | case CMD_TARGET_STATUS: | |
764 | /* Pass it up to the upper layers... */ | |
b0cf0b11 | 765 | if (!ei->ScsiStatus) { |
1da177e4 LT |
766 | |
767 | /* Ordinarily, this case should never happen, but there is a bug | |
768 | in some released firmware revisions that allows it to happen | |
769 | if, for example, a 4100 backplane loses power and the tape | |
770 | drive is in it. We assume that it's a fatal error of some | |
771 | kind because we can't show that it wasn't. We will make it | |
772 | look like selection timeout since that is the most common | |
773 | reason for this to occur, and it's severe enough. */ | |
774 | ||
775 | cmd->result = DID_NO_CONNECT << 16; | |
776 | } | |
777 | break; | |
778 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
779 | break; | |
780 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 781 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 782 | " completed with data overrun " |
f70dba83 | 783 | "reported\n", c); |
1da177e4 LT |
784 | break; |
785 | case CMD_INVALID: { | |
f70dba83 SC |
786 | /* print_bytes(c, sizeof(*c), 1, 0); |
787 | print_cmd(c); */ | |
1da177e4 LT |
788 | /* We get CMD_INVALID if you address a non-existent tape drive instead |
789 | of a selection timeout (no response). You will see this if you yank | |
790 | out a tape drive, then try to access it. This is kind of a shame | |
791 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
792 | get interpreted as a missing target. */ | |
793 | cmd->result = DID_NO_CONNECT << 16; | |
794 | } | |
795 | break; | |
796 | case CMD_PROTOCOL_ERR: | |
2453f5f9 | 797 | cmd->result = DID_ERROR << 16; |
b2a4a43d SC |
798 | dev_warn(&h->pdev->dev, |
799 | "%p has protocol error\n", c); | |
1da177e4 LT |
800 | break; |
801 | case CMD_HARDWARE_ERR: | |
802 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
803 | dev_warn(&h->pdev->dev, |
804 | "%p had hardware error\n", c); | |
1da177e4 LT |
805 | break; |
806 | case CMD_CONNECTION_LOST: | |
807 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
808 | dev_warn(&h->pdev->dev, |
809 | "%p had connection lost\n", c); | |
1da177e4 LT |
810 | break; |
811 | case CMD_ABORTED: | |
812 | cmd->result = DID_ABORT << 16; | |
b2a4a43d | 813 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
814 | break; |
815 | case CMD_ABORT_FAILED: | |
816 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
817 | dev_warn(&h->pdev->dev, |
818 | "%p reports abort failed\n", c); | |
1da177e4 LT |
819 | break; |
820 | case CMD_UNSOLICITED_ABORT: | |
821 | cmd->result = DID_ABORT << 16; | |
6d9a4f9e | 822 | dev_warn(&h->pdev->dev, "%p aborted due to an " |
b2a4a43d | 823 | "unsolicited abort\n", c); |
1da177e4 LT |
824 | break; |
825 | case CMD_TIMEOUT: | |
826 | cmd->result = DID_TIME_OUT << 16; | |
b2a4a43d | 827 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 | 828 | break; |
6d9a4f9e SC |
829 | case CMD_UNABORTABLE: |
830 | cmd->result = DID_ERROR << 16; | |
831 | dev_warn(&h->pdev->dev, "c %p command " | |
832 | "unabortable\n", c); | |
833 | break; | |
1da177e4 LT |
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; | |
8a4ec67b | 857 | sh->can_queue = cciss_tape_cmds; |
f70dba83 | 858 | sh->sg_tablesize = h->maxsgentries; |
79600aad | 859 | sh->max_cmd_len = MAX_COMMAND_SIZE; |
395d2875 | 860 | sh->max_sectors = h->cciss_max_sectors; |
1da177e4 LT |
861 | |
862 | ((struct cciss_scsi_adapter_data_t *) | |
f70dba83 SC |
863 | h->scsi_ctlr)->scsi_host = sh; |
864 | sh->hostdata[0] = (unsigned long) h; | |
865 | sh->irq = h->intr[SIMPLE_MODE_INT]; | |
1da177e4 | 866 | sh->unique_id = sh->irq; |
f70dba83 | 867 | error = scsi_add_host(sh, &h->pdev->dev); |
1da177e4 LT |
868 | if (error) |
869 | goto fail_host_put; | |
870 | scsi_scan_host(sh); | |
871 | return 1; | |
872 | ||
873 | fail_host_put: | |
874 | scsi_host_put(sh); | |
875 | fail: | |
876 | return 0; | |
877 | } | |
878 | ||
879 | static void | |
880 | cciss_unmap_one(struct pci_dev *pdev, | |
f70dba83 | 881 | CommandList_struct *c, |
1da177e4 LT |
882 | size_t buflen, |
883 | int data_direction) | |
884 | { | |
885 | u64bit addr64; | |
886 | ||
f70dba83 SC |
887 | addr64.val32.lower = c->SG[0].Addr.lower; |
888 | addr64.val32.upper = c->SG[0].Addr.upper; | |
1da177e4 LT |
889 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); |
890 | } | |
891 | ||
892 | static void | |
893 | cciss_map_one(struct pci_dev *pdev, | |
f70dba83 | 894 | CommandList_struct *c, |
1da177e4 LT |
895 | unsigned char *buf, |
896 | size_t buflen, | |
897 | int data_direction) | |
898 | { | |
899 | __u64 addr64; | |
900 | ||
901 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
f70dba83 | 902 | c->SG[0].Addr.lower = |
1da177e4 | 903 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); |
f70dba83 | 904 | c->SG[0].Addr.upper = |
1da177e4 | 905 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); |
f70dba83 SC |
906 | c->SG[0].Len = buflen; |
907 | c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
908 | c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
1da177e4 LT |
909 | } |
910 | ||
911 | static int | |
f70dba83 SC |
912 | cciss_scsi_do_simple_cmd(ctlr_info_t *h, |
913 | CommandList_struct *c, | |
1da177e4 LT |
914 | unsigned char *scsi3addr, |
915 | unsigned char *cdb, | |
916 | unsigned char cdblen, | |
917 | unsigned char *buf, int bufsize, | |
918 | int direction) | |
919 | { | |
6e9a4738 | 920 | DECLARE_COMPLETION_ONSTACK(wait); |
1da177e4 | 921 | |
f70dba83 SC |
922 | c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */ |
923 | c->scsi_cmd = NULL; | |
924 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
925 | memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN)); | |
926 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
927 | // Fill in the request block... |
928 | ||
929 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
930 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
931 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
932 | ||
f70dba83 SC |
933 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); |
934 | memcpy(c->Request.CDB, cdb, cdblen); | |
935 | c->Request.Timeout = 0; | |
936 | c->Request.CDBLen = cdblen; | |
937 | c->Request.Type.Type = TYPE_CMD; | |
938 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
939 | c->Request.Type.Direction = direction; | |
1da177e4 LT |
940 | |
941 | /* Fill in the SG list and do dma mapping */ | |
f70dba83 | 942 | cciss_map_one(h->pdev, c, (unsigned char *) buf, |
1da177e4 LT |
943 | bufsize, DMA_FROM_DEVICE); |
944 | ||
f70dba83 SC |
945 | c->waiting = &wait; |
946 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
947 | wait_for_completion(&wait); |
948 | ||
949 | /* undo the dma mapping */ | |
f70dba83 | 950 | cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE); |
1da177e4 LT |
951 | return(0); |
952 | } | |
953 | ||
954 | static void | |
b2a4a43d | 955 | cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
956 | { |
957 | ErrorInfo_struct *ei; | |
958 | ||
f70dba83 | 959 | ei = c->err_info; |
1da177e4 LT |
960 | switch(ei->CommandStatus) |
961 | { | |
962 | case CMD_TARGET_STATUS: | |
b2a4a43d SC |
963 | dev_warn(&h->pdev->dev, |
964 | "cmd %p has completed with errors\n", c); | |
965 | dev_warn(&h->pdev->dev, | |
966 | "cmd %p has SCSI Status = %x\n", | |
967 | c, ei->ScsiStatus); | |
1da177e4 | 968 | if (ei->ScsiStatus == 0) |
b2a4a43d SC |
969 | dev_warn(&h->pdev->dev, |
970 | "SCSI status is abnormally zero. " | |
1da177e4 LT |
971 | "(probably indicates selection timeout " |
972 | "reported incorrectly due to a known " | |
973 | "firmware bug, circa July, 2001.)\n"); | |
974 | break; | |
975 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
b2a4a43d | 976 | dev_info(&h->pdev->dev, "UNDERRUN\n"); |
1da177e4 LT |
977 | break; |
978 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 979 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 980 | " completed with data overrun " |
f70dba83 | 981 | "reported\n", c); |
1da177e4 LT |
982 | break; |
983 | case CMD_INVALID: { | |
984 | /* controller unfortunately reports SCSI passthru's */ | |
985 | /* to non-existent targets as invalid commands. */ | |
b2a4a43d SC |
986 | dev_warn(&h->pdev->dev, |
987 | "%p is reported invalid (probably means " | |
f70dba83 SC |
988 | "target device no longer present)\n", c); |
989 | /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0); | |
990 | print_cmd(c); */ | |
1da177e4 LT |
991 | } |
992 | break; | |
993 | case CMD_PROTOCOL_ERR: | |
b2a4a43d | 994 | dev_warn(&h->pdev->dev, "%p has protocol error\n", c); |
1da177e4 LT |
995 | break; |
996 | case CMD_HARDWARE_ERR: | |
997 | /* cmd->result = DID_ERROR << 16; */ | |
b2a4a43d | 998 | dev_warn(&h->pdev->dev, "%p had hardware error\n", c); |
1da177e4 LT |
999 | break; |
1000 | case CMD_CONNECTION_LOST: | |
b2a4a43d | 1001 | dev_warn(&h->pdev->dev, "%p had connection lost\n", c); |
1da177e4 LT |
1002 | break; |
1003 | case CMD_ABORTED: | |
b2a4a43d | 1004 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
1005 | break; |
1006 | case CMD_ABORT_FAILED: | |
b2a4a43d SC |
1007 | dev_warn(&h->pdev->dev, |
1008 | "%p reports abort failed\n", c); | |
1da177e4 LT |
1009 | break; |
1010 | case CMD_UNSOLICITED_ABORT: | |
b2a4a43d | 1011 | dev_warn(&h->pdev->dev, |
6d9a4f9e | 1012 | "%p aborted due to an unsolicited abort\n", c); |
1da177e4 LT |
1013 | break; |
1014 | case CMD_TIMEOUT: | |
b2a4a43d | 1015 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 | 1016 | break; |
6d9a4f9e SC |
1017 | case CMD_UNABORTABLE: |
1018 | dev_warn(&h->pdev->dev, | |
1019 | "%p unabortable\n", c); | |
1020 | break; | |
1da177e4 | 1021 | default: |
b2a4a43d SC |
1022 | dev_warn(&h->pdev->dev, |
1023 | "%p returned unknown status %x\n", | |
1024 | c, ei->CommandStatus); | |
1da177e4 LT |
1025 | } |
1026 | } | |
1027 | ||
1028 | static int | |
f70dba83 | 1029 | cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1030 | unsigned char page, unsigned char *buf, |
1031 | unsigned char bufsize) | |
1da177e4 LT |
1032 | { |
1033 | int rc; | |
f70dba83 | 1034 | CommandList_struct *c; |
1da177e4 LT |
1035 | char cdb[6]; |
1036 | ErrorInfo_struct *ei; | |
1037 | unsigned long flags; | |
1038 | ||
f70dba83 SC |
1039 | spin_lock_irqsave(&h->lock, flags); |
1040 | c = scsi_cmd_alloc(h); | |
1041 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 | 1042 | |
f70dba83 | 1043 | if (c == NULL) { /* trouble... */ |
1da177e4 LT |
1044 | printk("cmd_alloc returned NULL!\n"); |
1045 | return -1; | |
1046 | } | |
1047 | ||
f70dba83 | 1048 | ei = c->err_info; |
1da177e4 LT |
1049 | |
1050 | cdb[0] = CISS_INQUIRY; | |
905bd78f | 1051 | cdb[1] = (page != 0); |
1052 | cdb[2] = page; | |
1da177e4 | 1053 | cdb[3] = 0; |
47922d06 | 1054 | cdb[4] = bufsize; |
1da177e4 | 1055 | cdb[5] = 0; |
f70dba83 | 1056 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb, |
47922d06 | 1057 | 6, buf, bufsize, XFER_READ); |
1da177e4 LT |
1058 | |
1059 | if (rc != 0) return rc; /* something went wrong */ | |
1060 | ||
1061 | if (ei->CommandStatus != 0 && | |
1062 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1063 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1064 | rc = -1; |
1065 | } | |
f70dba83 SC |
1066 | spin_lock_irqsave(&h->lock, flags); |
1067 | scsi_cmd_free(h, c); | |
1068 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1069 | return rc; |
1070 | } | |
1071 | ||
905bd78f | 1072 | /* Get the device id from inquiry page 0x83 */ |
f70dba83 | 1073 | static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1074 | unsigned char *device_id, int buflen) |
1075 | { | |
1076 | int rc; | |
1077 | unsigned char *buf; | |
1078 | ||
1079 | if (buflen > 16) | |
1080 | buflen = 16; | |
1081 | buf = kzalloc(64, GFP_KERNEL); | |
1082 | if (!buf) | |
1083 | return -1; | |
f70dba83 | 1084 | rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); |
905bd78f | 1085 | if (rc == 0) |
1086 | memcpy(device_id, &buf[8], buflen); | |
1087 | kfree(buf); | |
1088 | return rc != 0; | |
1089 | } | |
1090 | ||
1da177e4 | 1091 | static int |
f70dba83 | 1092 | cciss_scsi_do_report_phys_luns(ctlr_info_t *h, |
1da177e4 LT |
1093 | ReportLunData_struct *buf, int bufsize) |
1094 | { | |
1095 | int rc; | |
f70dba83 | 1096 | CommandList_struct *c; |
1da177e4 LT |
1097 | unsigned char cdb[12]; |
1098 | unsigned char scsi3addr[8]; | |
1099 | ErrorInfo_struct *ei; | |
1100 | unsigned long flags; | |
1101 | ||
f70dba83 SC |
1102 | spin_lock_irqsave(&h->lock, flags); |
1103 | c = scsi_cmd_alloc(h); | |
1104 | spin_unlock_irqrestore(&h->lock, flags); | |
1105 | if (c == NULL) { /* trouble... */ | |
1da177e4 LT |
1106 | printk("cmd_alloc returned NULL!\n"); |
1107 | return -1; | |
1108 | } | |
1109 | ||
1110 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
1111 | cdb[0] = CISS_REPORT_PHYS; | |
1112 | cdb[1] = 0; | |
1113 | cdb[2] = 0; | |
1114 | cdb[3] = 0; | |
1115 | cdb[4] = 0; | |
1116 | cdb[5] = 0; | |
1117 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
1118 | cdb[7] = (bufsize >> 16) & 0xFF; | |
1119 | cdb[8] = (bufsize >> 8) & 0xFF; | |
1120 | cdb[9] = bufsize & 0xFF; | |
1121 | cdb[10] = 0; | |
1122 | cdb[11] = 0; | |
1123 | ||
f70dba83 | 1124 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, |
1da177e4 LT |
1125 | cdb, 12, |
1126 | (unsigned char *) buf, | |
1127 | bufsize, XFER_READ); | |
1128 | ||
1129 | if (rc != 0) return rc; /* something went wrong */ | |
1130 | ||
f70dba83 | 1131 | ei = c->err_info; |
1da177e4 LT |
1132 | if (ei->CommandStatus != 0 && |
1133 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1134 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1135 | rc = -1; |
1136 | } | |
f70dba83 SC |
1137 | spin_lock_irqsave(&h->lock, flags); |
1138 | scsi_cmd_free(h, c); | |
1139 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1140 | return rc; |
1141 | } | |
1142 | ||
1143 | static void | |
f70dba83 | 1144 | cciss_update_non_disk_devices(ctlr_info_t *h, int hostno) |
1da177e4 LT |
1145 | { |
1146 | /* the idea here is we could get notified from /proc | |
1147 | that some devices have changed, so we do a report | |
1148 | physical luns cmd, and adjust our list of devices | |
1149 | accordingly. (We can't rely on the scsi-mid layer just | |
1150 | doing inquiries, because the "busses" that the scsi | |
1151 | mid-layer probes are totally fabricated by this driver, | |
1152 | so new devices wouldn't show up. | |
1153 | ||
1154 | the scsi3addr's of devices won't change so long as the | |
1155 | adapter is not reset. That means we can rescan and | |
1156 | tell which devices we already know about, vs. new | |
1157 | devices, vs. disappearing devices. | |
1158 | ||
1159 | Also, if you yank out a tape drive, then put in a disk | |
1160 | in it's place, (say, a configured volume from another | |
1161 | array controller for instance) _don't_ poke this driver | |
1162 | (so it thinks it's still a tape, but _do_ poke the scsi | |
1163 | mid layer, so it does an inquiry... the scsi mid layer | |
1164 | will see the physical disk. This would be bad. Need to | |
1165 | think about how to prevent that. One idea would be to | |
1166 | snoop all scsi responses and if an inquiry repsonse comes | |
1167 | back that reports a disk, chuck it an return selection | |
1168 | timeout instead and adjust our table... Not sure i like | |
1169 | that though. | |
1170 | ||
1171 | */ | |
47922d06 MM |
1172 | #define OBDR_TAPE_INQ_SIZE 49 |
1173 | #define OBDR_TAPE_SIG "$DR-10" | |
1da177e4 | 1174 | ReportLunData_struct *ld_buff; |
47922d06 | 1175 | unsigned char *inq_buff; |
1da177e4 | 1176 | unsigned char scsi3addr[8]; |
1da177e4 LT |
1177 | __u32 num_luns=0; |
1178 | unsigned char *ch; | |
905bd78f | 1179 | struct cciss_scsi_dev_t *currentsd, *this_device; |
1da177e4 LT |
1180 | int ncurrent=0; |
1181 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1182 | int i; | |
1183 | ||
06ff37ff | 1184 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
47922d06 | 1185 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
905bd78f | 1186 | currentsd = kzalloc(sizeof(*currentsd) * |
1187 | (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); | |
1188 | if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { | |
1189 | printk(KERN_ERR "cciss: out of memory\n"); | |
1190 | goto out; | |
1da177e4 | 1191 | } |
905bd78f | 1192 | this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
f70dba83 | 1193 | if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) { |
1da177e4 LT |
1194 | ch = &ld_buff->LUNListLength[0]; |
1195 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1196 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1197 | printk(KERN_WARNING | |
1198 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1199 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1200 | num_luns - CISS_MAX_PHYS_LUN); | |
1201 | num_luns = CISS_MAX_PHYS_LUN; | |
1202 | } | |
1203 | } | |
1204 | else { | |
1205 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1206 | goto out; | |
1207 | } | |
1208 | ||
1209 | ||
1210 | /* adjust our table of devices */ | |
905bd78f | 1211 | for (i = 0; i < num_luns; i++) { |
1da177e4 LT |
1212 | /* for each physical lun, do an inquiry */ |
1213 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
47922d06 | 1214 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
1da177e4 LT |
1215 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
1216 | ||
f70dba83 | 1217 | if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, |
905bd78f | 1218 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) |
1da177e4 | 1219 | /* Inquiry failed (msg printed already) */ |
905bd78f | 1220 | continue; /* so we will skip this device. */ |
1221 | ||
1222 | this_device->devtype = (inq_buff[0] & 0x1f); | |
1223 | this_device->bus = -1; | |
1224 | this_device->target = -1; | |
1225 | this_device->lun = -1; | |
1226 | memcpy(this_device->scsi3addr, scsi3addr, 8); | |
1227 | memcpy(this_device->vendor, &inq_buff[8], | |
1228 | sizeof(this_device->vendor)); | |
1229 | memcpy(this_device->model, &inq_buff[16], | |
1230 | sizeof(this_device->model)); | |
1231 | memcpy(this_device->revision, &inq_buff[32], | |
1232 | sizeof(this_device->revision)); | |
1233 | memset(this_device->device_id, 0, | |
1234 | sizeof(this_device->device_id)); | |
f70dba83 | 1235 | cciss_scsi_get_device_id(h, scsi3addr, |
905bd78f | 1236 | this_device->device_id, sizeof(this_device->device_id)); |
1237 | ||
1238 | switch (this_device->devtype) | |
1da177e4 | 1239 | { |
47922d06 MM |
1240 | case 0x05: /* CD-ROM */ { |
1241 | ||
1242 | /* We don't *really* support actual CD-ROM devices, | |
1243 | * just this "One Button Disaster Recovery" tape drive | |
1244 | * which temporarily pretends to be a CD-ROM drive. | |
1245 | * So we check that the device is really an OBDR tape | |
1246 | * device by checking for "$DR-10" in bytes 43-48 of | |
1247 | * the inquiry data. | |
1248 | */ | |
1249 | char obdr_sig[7]; | |
1250 | ||
1251 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1252 | obdr_sig[6] = '\0'; | |
1253 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1254 | /* Not OBDR device, ignore it. */ | |
1255 | break; | |
1256 | } | |
1257 | /* fall through . . . */ | |
1da177e4 LT |
1258 | case 0x01: /* sequential access, (tape) */ |
1259 | case 0x08: /* medium changer */ | |
1260 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1261 | printk(KERN_INFO "cciss%d: %s ignored, " | |
f70dba83 | 1262 | "too many devices.\n", h->ctlr, |
905bd78f | 1263 | scsi_device_type(this_device->devtype)); |
1da177e4 LT |
1264 | break; |
1265 | } | |
905bd78f | 1266 | currentsd[ncurrent] = *this_device; |
1da177e4 LT |
1267 | ncurrent++; |
1268 | break; | |
1269 | default: | |
1270 | break; | |
1271 | } | |
1272 | } | |
1273 | ||
f70dba83 | 1274 | adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent); |
1da177e4 LT |
1275 | out: |
1276 | kfree(inq_buff); | |
1277 | kfree(ld_buff); | |
905bd78f | 1278 | kfree(currentsd); |
1da177e4 LT |
1279 | return; |
1280 | } | |
1281 | ||
1282 | static int | |
1283 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1284 | { | |
1285 | int verb_len = strlen(verb); | |
1286 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1287 | return verb_len; | |
1288 | else | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | static int | |
f70dba83 | 1293 | cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length) |
1da177e4 LT |
1294 | { |
1295 | int arg_len; | |
1296 | ||
1297 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
f70dba83 | 1298 | cciss_update_non_disk_devices(h, hostno); |
1da177e4 LT |
1299 | else |
1300 | return -EINVAL; | |
1301 | return length; | |
1302 | } | |
1303 | ||
1da177e4 | 1304 | static int |
e88b7bb0 | 1305 | cciss_scsi_write_info(struct Scsi_Host *sh, |
1da177e4 | 1306 | char *buffer, /* data buffer */ |
e88b7bb0 | 1307 | int length) /* length of data in buffer */ |
1da177e4 | 1308 | { |
e88b7bb0 AV |
1309 | ctlr_info_t *h = (ctlr_info_t *) sh->hostdata[0]; |
1310 | if (h == NULL) /* This really shouldn't ever happen. */ | |
1311 | return -EINVAL; | |
1da177e4 | 1312 | |
e88b7bb0 AV |
1313 | return cciss_scsi_user_command(h, sh->host_no, |
1314 | buffer, length); | |
1315 | } | |
1316 | ||
1317 | static int | |
1318 | cciss_scsi_show_info(struct seq_file *m, struct Scsi_Host *sh) | |
1319 | { | |
1320 | ||
1321 | ctlr_info_t *h = (ctlr_info_t *) sh->hostdata[0]; | |
b9f0bd08 | 1322 | int i; |
1da177e4 | 1323 | |
f70dba83 | 1324 | if (h == NULL) /* This really shouldn't ever happen. */ |
1da177e4 LT |
1325 | return -EINVAL; |
1326 | ||
e88b7bb0 AV |
1327 | seq_printf(m, "cciss%d: SCSI host: %d\n", |
1328 | h->ctlr, sh->host_no); | |
1329 | ||
1330 | /* this information is needed by apps to know which cciss | |
1331 | device corresponds to which scsi host number without | |
1332 | having to open a scsi target device node. The device | |
1333 | information is not a duplicate of /proc/scsi/scsi because | |
1334 | the two may be out of sync due to scsi hotplug, rather | |
1335 | this info is for an app to be able to use to know how to | |
1336 | get them back in sync. */ | |
1337 | ||
1338 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
1339 | struct cciss_scsi_dev_t *sd = | |
1340 | &ccissscsi[h->ctlr].dev[i]; | |
1341 | seq_printf(m, "c%db%dt%dl%d %02d " | |
1342 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1343 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1344 | sd->devtype, | |
1345 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1346 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1347 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1348 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1349 | } | |
1350 | return 0; | |
1351 | } | |
1da177e4 LT |
1352 | |
1353 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1354 | dma mapping and fills in the scatter gather entries of the | |
f70dba83 | 1355 | cciss command, c. */ |
1da177e4 | 1356 | |
f70dba83 | 1357 | static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c, |
87c3a922 | 1358 | struct scsi_cmnd *cmd) |
1da177e4 | 1359 | { |
41ce639a FT |
1360 | unsigned int len; |
1361 | struct scatterlist *sg; | |
1da177e4 | 1362 | __u64 addr64; |
87c3a922 SC |
1363 | int request_nsgs, i, chained, sg_index; |
1364 | struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr; | |
1365 | SGDescriptor_struct *curr_sg; | |
1366 | ||
1367 | BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); | |
1368 | ||
1369 | chained = 0; | |
1370 | sg_index = 0; | |
f70dba83 | 1371 | curr_sg = c->SG; |
87c3a922 SC |
1372 | request_nsgs = scsi_dma_map(cmd); |
1373 | if (request_nsgs) { | |
1374 | scsi_for_each_sg(cmd, sg, request_nsgs, i) { | |
1375 | if (sg_index + 1 == h->max_cmd_sgentries && | |
1376 | !chained && request_nsgs - i > 1) { | |
1377 | chained = 1; | |
1378 | sg_index = 0; | |
f70dba83 | 1379 | curr_sg = sa->cmd_sg_list[c->cmdindex]; |
87c3a922 | 1380 | } |
41ce639a FT |
1381 | addr64 = (__u64) sg_dma_address(sg); |
1382 | len = sg_dma_len(sg); | |
87c3a922 SC |
1383 | curr_sg[sg_index].Addr.lower = |
1384 | (__u32) (addr64 & 0x0FFFFFFFFULL); | |
1385 | curr_sg[sg_index].Addr.upper = | |
1386 | (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); | |
1387 | curr_sg[sg_index].Len = len; | |
1388 | curr_sg[sg_index].Ext = 0; | |
1389 | ++sg_index; | |
1da177e4 | 1390 | } |
87c3a922 | 1391 | if (chained) |
f70dba83 SC |
1392 | cciss_map_sg_chain_block(h, c, |
1393 | sa->cmd_sg_list[c->cmdindex], | |
87c3a922 SC |
1394 | (request_nsgs - (h->max_cmd_sgentries - 1)) * |
1395 | sizeof(SGDescriptor_struct)); | |
41ce639a | 1396 | } |
87c3a922 SC |
1397 | /* track how many SG entries we are using */ |
1398 | if (request_nsgs > h->maxSG) | |
1399 | h->maxSG = request_nsgs; | |
bc67f636 | 1400 | c->Header.SGTotal = (u16) request_nsgs + chained; |
87c3a922 | 1401 | if (request_nsgs > h->max_cmd_sgentries) |
f70dba83 | 1402 | c->Header.SGList = h->max_cmd_sgentries; |
87c3a922 | 1403 | else |
f70dba83 | 1404 | c->Header.SGList = c->Header.SGTotal; |
1da177e4 LT |
1405 | return; |
1406 | } | |
1407 | ||
1408 | ||
1409 | static int | |
f281233d | 1410 | cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
1da177e4 | 1411 | { |
f70dba83 SC |
1412 | ctlr_info_t *h; |
1413 | int rc; | |
1da177e4 | 1414 | unsigned char scsi3addr[8]; |
f70dba83 | 1415 | CommandList_struct *c; |
1da177e4 LT |
1416 | unsigned long flags; |
1417 | ||
1418 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1419 | // We violate cmd->host privacy here. (Is there another way?) | |
f70dba83 | 1420 | h = (ctlr_info_t *) cmd->device->host->hostdata[0]; |
1da177e4 | 1421 | |
f70dba83 | 1422 | rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id, |
1da177e4 LT |
1423 | cmd->device->lun, scsi3addr); |
1424 | if (rc != 0) { | |
1425 | /* the scsi nexus does not match any that we presented... */ | |
1426 | /* pretend to mid layer that we got selection timeout */ | |
1427 | cmd->result = DID_NO_CONNECT << 16; | |
1428 | done(cmd); | |
1429 | /* we might want to think about registering controller itself | |
1430 | as a processor device on the bus so sg binds to it. */ | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1da177e4 LT |
1434 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and |
1435 | see what the device thinks of it. */ | |
1436 | ||
f70dba83 SC |
1437 | spin_lock_irqsave(&h->lock, flags); |
1438 | c = scsi_cmd_alloc(h); | |
1439 | spin_unlock_irqrestore(&h->lock, flags); | |
1440 | if (c == NULL) { /* trouble... */ | |
b2a4a43d | 1441 | dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n"); |
1da177e4 LT |
1442 | /* FIXME: next 3 lines are -> BAD! <- */ |
1443 | cmd->result = DID_NO_CONNECT << 16; | |
1444 | done(cmd); | |
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | // Fill in the command list header | |
1449 | ||
1450 | cmd->scsi_done = done; // save this for use by completion code | |
1451 | ||
f70dba83 SC |
1452 | /* save c in case we have to abort it */ |
1453 | cmd->host_scribble = (unsigned char *) c; | |
1da177e4 | 1454 | |
f70dba83 SC |
1455 | c->cmd_type = CMD_SCSI; |
1456 | c->scsi_cmd = cmd; | |
1457 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
1458 | memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1459 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
1460 | |
1461 | // Fill in the request block... | |
1462 | ||
f70dba83 SC |
1463 | c->Request.Timeout = 0; |
1464 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); | |
1465 | BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); | |
1466 | c->Request.CDBLen = cmd->cmd_len; | |
1467 | memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1468 | c->Request.Type.Type = TYPE_CMD; | |
1469 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
1da177e4 LT |
1470 | switch(cmd->sc_data_direction) |
1471 | { | |
f70dba83 SC |
1472 | case DMA_TO_DEVICE: |
1473 | c->Request.Type.Direction = XFER_WRITE; | |
1474 | break; | |
1475 | case DMA_FROM_DEVICE: | |
1476 | c->Request.Type.Direction = XFER_READ; | |
1477 | break; | |
1478 | case DMA_NONE: | |
1479 | c->Request.Type.Direction = XFER_NONE; | |
1480 | break; | |
1da177e4 LT |
1481 | case DMA_BIDIRECTIONAL: |
1482 | // This can happen if a buggy application does a scsi passthru | |
1483 | // and sets both inlen and outlen to non-zero. ( see | |
1484 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1485 | ||
f70dba83 | 1486 | c->Request.Type.Direction = XFER_RSVD; |
1da177e4 LT |
1487 | // This is technically wrong, and cciss controllers should |
1488 | // reject it with CMD_INVALID, which is the most correct | |
1489 | // response, but non-fibre backends appear to let it | |
1490 | // slide by, and give the same results as if this field | |
1491 | // were set correctly. Either way is acceptable for | |
1492 | // our purposes here. | |
1493 | ||
1494 | break; | |
1495 | ||
1496 | default: | |
b2a4a43d | 1497 | dev_warn(&h->pdev->dev, "unknown data direction: %d\n", |
1da177e4 LT |
1498 | cmd->sc_data_direction); |
1499 | BUG(); | |
1500 | break; | |
1501 | } | |
f70dba83 SC |
1502 | cciss_scatter_gather(h, c, cmd); |
1503 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
1504 | /* the cmd'll come back via intr handler in complete_scsi_command() */ |
1505 | return 0; | |
1506 | } | |
1507 | ||
f281233d JG |
1508 | static DEF_SCSI_QCMD(cciss_scsi_queue_command) |
1509 | ||
f70dba83 | 1510 | static void cciss_unregister_scsi(ctlr_info_t *h) |
1da177e4 LT |
1511 | { |
1512 | struct cciss_scsi_adapter_data_t *sa; | |
1513 | struct cciss_scsi_cmd_stack_t *stk; | |
1514 | unsigned long flags; | |
1515 | ||
1516 | /* we are being forcibly unloaded, and may not refuse. */ | |
1517 | ||
f70dba83 SC |
1518 | spin_lock_irqsave(&h->lock, flags); |
1519 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1520 | stk = &sa->cmd_stack; |
1521 | ||
1522 | /* if we weren't ever actually registered, don't unregister */ | |
1523 | if (sa->registered) { | |
f70dba83 | 1524 | spin_unlock_irqrestore(&h->lock, flags); |
1da177e4 LT |
1525 | scsi_remove_host(sa->scsi_host); |
1526 | scsi_host_put(sa->scsi_host); | |
f70dba83 | 1527 | spin_lock_irqsave(&h->lock, flags); |
1da177e4 LT |
1528 | } |
1529 | ||
1530 | /* set scsi_host to NULL so our detect routine will | |
1531 | find us on register */ | |
1532 | sa->scsi_host = NULL; | |
f70dba83 SC |
1533 | spin_unlock_irqrestore(&h->lock, flags); |
1534 | scsi_cmd_stack_free(h); | |
1da177e4 | 1535 | kfree(sa); |
1da177e4 LT |
1536 | } |
1537 | ||
f70dba83 | 1538 | static int cciss_engage_scsi(ctlr_info_t *h) |
1da177e4 LT |
1539 | { |
1540 | struct cciss_scsi_adapter_data_t *sa; | |
1541 | struct cciss_scsi_cmd_stack_t *stk; | |
1542 | unsigned long flags; | |
1543 | ||
f70dba83 SC |
1544 | spin_lock_irqsave(&h->lock, flags); |
1545 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1546 | stk = &sa->cmd_stack; |
1547 | ||
f4a93bcd | 1548 | if (sa->registered) { |
b2a4a43d | 1549 | dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n"); |
f70dba83 | 1550 | spin_unlock_irqrestore(&h->lock, flags); |
8721c81f | 1551 | return -ENXIO; |
1da177e4 | 1552 | } |
f4a93bcd | 1553 | sa->registered = 1; |
f70dba83 SC |
1554 | spin_unlock_irqrestore(&h->lock, flags); |
1555 | cciss_update_non_disk_devices(h, -1); | |
1556 | cciss_scsi_detect(h); | |
1da177e4 LT |
1557 | return 0; |
1558 | } | |
1559 | ||
1560 | static void | |
f70dba83 | 1561 | cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h) |
1da177e4 LT |
1562 | { |
1563 | unsigned long flags; | |
1da177e4 | 1564 | |
f70dba83 | 1565 | CPQ_TAPE_LOCK(h, flags); |
89b6e743 | 1566 | seq_printf(seq, |
b9f0bd08 | 1567 | "Sequential access devices: %d\n\n", |
f70dba83 SC |
1568 | ccissscsi[h->ctlr].ndevices); |
1569 | CPQ_TAPE_UNLOCK(h, flags); | |
1da177e4 LT |
1570 | } |
1571 | ||
88f627ae SC |
1572 | static int wait_for_device_to_become_ready(ctlr_info_t *h, |
1573 | unsigned char lunaddr[]) | |
1574 | { | |
1575 | int rc; | |
1576 | int count = 0; | |
1577 | int waittime = HZ; | |
1578 | CommandList_struct *c; | |
1579 | ||
6b4d96b8 | 1580 | c = cmd_alloc(h); |
88f627ae | 1581 | if (!c) { |
b2a4a43d SC |
1582 | dev_warn(&h->pdev->dev, "out of memory in " |
1583 | "wait_for_device_to_become_ready.\n"); | |
88f627ae SC |
1584 | return IO_ERROR; |
1585 | } | |
1586 | ||
1587 | /* Send test unit ready until device ready, or give up. */ | |
1588 | while (count < 20) { | |
1589 | ||
1590 | /* Wait for a bit. do this first, because if we send | |
1591 | * the TUR right away, the reset will just abort it. | |
1592 | */ | |
40df6ae4 | 1593 | schedule_timeout_uninterruptible(waittime); |
88f627ae SC |
1594 | count++; |
1595 | ||
1596 | /* Increase wait time with each try, up to a point. */ | |
1597 | if (waittime < (HZ * 30)) | |
1598 | waittime = waittime * 2; | |
1599 | ||
1600 | /* Send the Test Unit Ready */ | |
f70dba83 | 1601 | rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0, |
88f627ae | 1602 | lunaddr, TYPE_CMD); |
85cc61ae | 1603 | if (rc == 0) |
1604 | rc = sendcmd_withirq_core(h, c, 0); | |
1605 | ||
1606 | (void) process_sendcmd_error(h, c); | |
88f627ae | 1607 | |
3969251b | 1608 | if (rc != 0) |
1609 | goto retry_tur; | |
88f627ae | 1610 | |
3969251b | 1611 | if (c->err_info->CommandStatus == CMD_SUCCESS) |
88f627ae SC |
1612 | break; |
1613 | ||
3969251b | 1614 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && |
1615 | c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { | |
1616 | if (c->err_info->SenseInfo[2] == NO_SENSE) | |
1617 | break; | |
1618 | if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { | |
1619 | unsigned char asc; | |
1620 | asc = c->err_info->SenseInfo[12]; | |
1621 | check_for_unit_attention(h, c); | |
1622 | if (asc == POWER_OR_RESET) | |
1623 | break; | |
1624 | } | |
1625 | } | |
1626 | retry_tur: | |
b2a4a43d | 1627 | dev_warn(&h->pdev->dev, "Waiting %d secs " |
88f627ae | 1628 | "for device to become ready.\n", |
b2a4a43d | 1629 | waittime / HZ); |
88f627ae SC |
1630 | rc = 1; /* device not ready. */ |
1631 | } | |
1632 | ||
1633 | if (rc) | |
b2a4a43d | 1634 | dev_warn(&h->pdev->dev, "giving up on device.\n"); |
88f627ae | 1635 | else |
b2a4a43d | 1636 | dev_warn(&h->pdev->dev, "device is ready.\n"); |
88f627ae | 1637 | |
6b4d96b8 | 1638 | cmd_free(h, c); |
88f627ae SC |
1639 | return rc; |
1640 | } | |
89b6e743 | 1641 | |
3da8b713 | 1642 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
1643 | * complaining. Doing a host- or bus-reset can't do anything good here. | |
1644 | * Despite what it might say in scsi_error.c, there may well be commands | |
1645 | * on the controller, as the cciss driver registers twice, once as a block | |
1646 | * device for the logical drives, and once as a scsi device, for any tape | |
1647 | * drives. So we know there are no commands out on the tape drives, but we | |
1648 | * don't know there are no commands on the controller, and it is likely | |
1649 | * that there probably are, as the cciss block device is most commonly used | |
1650 | * as a boot device (embedded controller on HP/Compaq systems.) | |
1651 | */ | |
1652 | ||
1653 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) | |
1654 | { | |
1655 | int rc; | |
1656 | CommandList_struct *cmd_in_trouble; | |
88f627ae | 1657 | unsigned char lunaddr[8]; |
f70dba83 | 1658 | ctlr_info_t *h; |
3da8b713 | 1659 | |
1660 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1661 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1662 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1663 | return FAILED; |
b2a4a43d | 1664 | dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n"); |
3da8b713 | 1665 | /* find the command that's giving us trouble */ |
1666 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; | |
88f627ae | 1667 | if (cmd_in_trouble == NULL) /* paranoia */ |
3da8b713 | 1668 | return FAILED; |
88f627ae | 1669 | memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); |
3da8b713 | 1670 | /* send a reset to the SCSI LUN which the command was sent to */ |
f70dba83 | 1671 | rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr, |
3da8b713 | 1672 | TYPE_MSG); |
f70dba83 | 1673 | if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0) |
3da8b713 | 1674 | return SUCCESS; |
b2a4a43d | 1675 | dev_warn(&h->pdev->dev, "resetting device failed.\n"); |
3da8b713 | 1676 | return FAILED; |
1677 | } | |
1678 | ||
1679 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) | |
1680 | { | |
1681 | int rc; | |
1682 | CommandList_struct *cmd_to_abort; | |
85cc61ae | 1683 | unsigned char lunaddr[8]; |
f70dba83 | 1684 | ctlr_info_t *h; |
3da8b713 | 1685 | |
1686 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1687 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1688 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1689 | return FAILED; |
b2a4a43d | 1690 | dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n"); |
3da8b713 | 1691 | |
1692 | /* find the command to be aborted */ | |
1693 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; | |
1694 | if (cmd_to_abort == NULL) /* paranoia */ | |
1695 | return FAILED; | |
85cc61ae | 1696 | memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); |
f70dba83 | 1697 | rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag, |
85cc61ae | 1698 | 0, 0, lunaddr, TYPE_MSG); |
3da8b713 | 1699 | if (rc == 0) |
1700 | return SUCCESS; | |
1701 | return FAILED; | |
1702 | ||
1703 | } | |
1704 | ||
1da177e4 LT |
1705 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
1706 | ||
1707 | /* If no tape support, then these become defined out of existence */ | |
1708 | ||
1709 | #define cciss_scsi_setup(cntl_num) | |
0007a4c9 | 1710 | #define cciss_engage_scsi(h) |
1da177e4 LT |
1711 | |
1712 | #endif /* CONFIG_CISS_SCSI_TAPE */ |