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1da177e4 | 1 | /* |
bd4f36d6 MM |
2 | * Disk Array driver for HP Smart Array controllers, SCSI Tape module. |
3 | * (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P. | |
1da177e4 LT |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
bd4f36d6 | 7 | * the Free Software Foundation; version 2 of the License. |
1da177e4 LT |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
bd4f36d6 MM |
11 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * General Public License for more details. | |
1da177e4 LT |
13 | * |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
bd4f36d6 MM |
16 | * Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA |
17 | * 02111-1307, USA. | |
1da177e4 LT |
18 | * |
19 | * Questions/Comments/Bugfixes to iss_storagedev@hp.com | |
20 | * | |
21 | * Author: Stephen M. Cameron | |
22 | */ | |
23 | #ifdef CONFIG_CISS_SCSI_TAPE | |
24 | ||
25 | /* Here we have code to present the driver as a scsi driver | |
26 | as it is simultaneously presented as a block driver. The | |
27 | reason for doing this is to allow access to SCSI tape drives | |
28 | through the array controller. Note in particular, neither | |
29 | physical nor logical disks are presented through the scsi layer. */ | |
30 | ||
4e57b681 TS |
31 | #include <linux/timer.h> |
32 | #include <linux/completion.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/string.h> | |
35 | ||
36 | #include <asm/atomic.h> | |
37 | ||
1da177e4 LT |
38 | #include <scsi/scsi_cmnd.h> |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_host.h> | |
1da177e4 LT |
41 | |
42 | #include "cciss_scsi.h" | |
43 | ||
3da8b713 | 44 | #define CCISS_ABORT_MSG 0x00 |
45 | #define CCISS_RESET_MSG 0x01 | |
46 | ||
f70dba83 | 47 | static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff, |
88f627ae | 48 | size_t size, |
b57695fe | 49 | __u8 page_code, unsigned char *scsi3addr, |
88f627ae SC |
50 | int cmd_type); |
51 | ||
6b4d96b8 SC |
52 | static CommandList_struct *cmd_alloc(ctlr_info_t *h); |
53 | static CommandList_struct *cmd_special_alloc(ctlr_info_t *h); | |
54 | static void cmd_free(ctlr_info_t *h, CommandList_struct *c); | |
55 | static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c); | |
1da177e4 LT |
56 | |
57 | static int cciss_scsi_proc_info( | |
58 | struct Scsi_Host *sh, | |
59 | char *buffer, /* data buffer */ | |
60 | char **start, /* where data in buffer starts */ | |
61 | off_t offset, /* offset from start of imaginary file */ | |
62 | int length, /* length of data in buffer */ | |
63 | int func); /* 0 == read, 1 == write */ | |
64 | ||
f281233d JG |
65 | static int cciss_scsi_queue_command (struct Scsi_Host *h, |
66 | struct scsi_cmnd *cmd); | |
3da8b713 | 67 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *); |
68 | static int cciss_eh_abort_handler(struct scsi_cmnd *); | |
1da177e4 LT |
69 | |
70 | static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { | |
71 | { .name = "cciss0", .ndevices = 0 }, | |
72 | { .name = "cciss1", .ndevices = 0 }, | |
73 | { .name = "cciss2", .ndevices = 0 }, | |
74 | { .name = "cciss3", .ndevices = 0 }, | |
75 | { .name = "cciss4", .ndevices = 0 }, | |
76 | { .name = "cciss5", .ndevices = 0 }, | |
77 | { .name = "cciss6", .ndevices = 0 }, | |
78 | { .name = "cciss7", .ndevices = 0 }, | |
79 | }; | |
80 | ||
81 | static struct scsi_host_template cciss_driver_template = { | |
82 | .module = THIS_MODULE, | |
83 | .name = "cciss", | |
84 | .proc_name = "cciss", | |
85 | .proc_info = cciss_scsi_proc_info, | |
86 | .queuecommand = cciss_scsi_queue_command, | |
1da177e4 | 87 | .this_id = 7, |
1da177e4 LT |
88 | .cmd_per_lun = 1, |
89 | .use_clustering = DISABLE_CLUSTERING, | |
3da8b713 | 90 | /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ |
91 | .eh_device_reset_handler= cciss_eh_device_reset_handler, | |
92 | .eh_abort_handler = cciss_eh_abort_handler, | |
1da177e4 LT |
93 | }; |
94 | ||
95 | #pragma pack(1) | |
1b7d0d28 | 96 | |
5e216153 MM |
97 | #define SCSI_PAD_32 8 |
98 | #define SCSI_PAD_64 8 | |
1b7d0d28 | 99 | |
1da177e4 LT |
100 | struct cciss_scsi_cmd_stack_elem_t { |
101 | CommandList_struct cmd; | |
102 | ErrorInfo_struct Err; | |
103 | __u32 busaddr; | |
87c3a922 | 104 | int cmdindex; |
1b7d0d28 | 105 | u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64]; |
1da177e4 LT |
106 | }; |
107 | ||
108 | #pragma pack() | |
109 | ||
1da177e4 LT |
110 | #pragma pack(1) |
111 | struct cciss_scsi_cmd_stack_t { | |
112 | struct cciss_scsi_cmd_stack_elem_t *pool; | |
8a4ec67b | 113 | struct cciss_scsi_cmd_stack_elem_t **elem; |
1da177e4 LT |
114 | dma_addr_t cmd_pool_handle; |
115 | int top; | |
8a4ec67b | 116 | int nelems; |
1da177e4 LT |
117 | }; |
118 | #pragma pack() | |
119 | ||
120 | struct cciss_scsi_adapter_data_t { | |
121 | struct Scsi_Host *scsi_host; | |
122 | struct cciss_scsi_cmd_stack_t cmd_stack; | |
87c3a922 | 123 | SGDescriptor_struct **cmd_sg_list; |
1da177e4 LT |
124 | int registered; |
125 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
126 | }; | |
127 | ||
f70dba83 SC |
128 | #define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \ |
129 | &h->scsi_ctlr->lock, flags); | |
130 | #define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \ | |
131 | &h->scsi_ctlr->lock, flags); | |
1da177e4 LT |
132 | |
133 | static CommandList_struct * | |
134 | scsi_cmd_alloc(ctlr_info_t *h) | |
135 | { | |
136 | /* assume only one process in here at a time, locking done by caller. */ | |
f70dba83 | 137 | /* use h->lock */ |
1da177e4 LT |
138 | /* might be better to rewrite how we allocate scsi commands in a way that */ |
139 | /* needs no locking at all. */ | |
140 | ||
141 | /* take the top memory chunk off the stack and return it, if any. */ | |
142 | struct cciss_scsi_cmd_stack_elem_t *c; | |
143 | struct cciss_scsi_adapter_data_t *sa; | |
144 | struct cciss_scsi_cmd_stack_t *stk; | |
145 | u64bit temp64; | |
146 | ||
aad9fb6f | 147 | sa = h->scsi_ctlr; |
1da177e4 LT |
148 | stk = &sa->cmd_stack; |
149 | ||
150 | if (stk->top < 0) | |
151 | return NULL; | |
152 | c = stk->elem[stk->top]; | |
153 | /* memset(c, 0, sizeof(*c)); */ | |
154 | memset(&c->cmd, 0, sizeof(c->cmd)); | |
155 | memset(&c->Err, 0, sizeof(c->Err)); | |
156 | /* set physical addr of cmd and addr of scsi parameters */ | |
157 | c->cmd.busaddr = c->busaddr; | |
87c3a922 | 158 | c->cmd.cmdindex = c->cmdindex; |
1da177e4 LT |
159 | /* (__u32) (stk->cmd_pool_handle + |
160 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ | |
161 | ||
162 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); | |
163 | /* (__u64) (stk->cmd_pool_handle + | |
164 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + | |
165 | sizeof(CommandList_struct)); */ | |
166 | stk->top--; | |
167 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; | |
168 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; | |
169 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); | |
170 | ||
171 | c->cmd.ctlr = h->ctlr; | |
172 | c->cmd.err_info = &c->Err; | |
173 | ||
174 | return (CommandList_struct *) c; | |
175 | } | |
176 | ||
177 | static void | |
f70dba83 | 178 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
179 | { |
180 | /* assume only one process in here at a time, locking done by caller. */ | |
f70dba83 | 181 | /* use h->lock */ |
1da177e4 LT |
182 | /* drop the free memory chunk on top of the stack. */ |
183 | ||
184 | struct cciss_scsi_adapter_data_t *sa; | |
185 | struct cciss_scsi_cmd_stack_t *stk; | |
186 | ||
aad9fb6f | 187 | sa = h->scsi_ctlr; |
1da177e4 | 188 | stk = &sa->cmd_stack; |
713b6864 | 189 | stk->top++; |
8a4ec67b | 190 | if (stk->top >= stk->nelems) { |
b2a4a43d SC |
191 | dev_err(&h->pdev->dev, |
192 | "scsi_cmd_free called too many times.\n"); | |
1da177e4 LT |
193 | BUG(); |
194 | } | |
f70dba83 | 195 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c; |
1da177e4 LT |
196 | } |
197 | ||
198 | static int | |
f70dba83 | 199 | scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa) |
1da177e4 LT |
200 | { |
201 | int i; | |
202 | struct cciss_scsi_cmd_stack_t *stk; | |
203 | size_t size; | |
204 | ||
8a4ec67b SC |
205 | stk = &sa->cmd_stack; |
206 | stk->nelems = cciss_tape_cmds + 2; | |
f70dba83 | 207 | sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, |
8a4ec67b | 208 | h->chainsize, stk->nelems); |
f70dba83 | 209 | if (!sa->cmd_sg_list && h->chainsize > 0) |
87c3a922 SC |
210 | return -ENOMEM; |
211 | ||
8a4ec67b | 212 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems; |
1da177e4 | 213 | |
1b7d0d28 SC |
214 | /* Check alignment, see cciss_cmd.h near CommandList_struct def. */ |
215 | BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0); | |
216 | /* pci_alloc_consistent guarantees 32-bit DMA address will be used */ | |
1da177e4 | 217 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) |
f70dba83 | 218 | pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle); |
1da177e4 LT |
219 | |
220 | if (stk->pool == NULL) { | |
8a4ec67b | 221 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems); |
87c3a922 SC |
222 | sa->cmd_sg_list = NULL; |
223 | return -ENOMEM; | |
1da177e4 | 224 | } |
8a4ec67b SC |
225 | stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL); |
226 | if (!stk->elem) { | |
227 | pci_free_consistent(h->pdev, size, stk->pool, | |
228 | stk->cmd_pool_handle); | |
229 | return -1; | |
230 | } | |
231 | for (i = 0; i < stk->nelems; i++) { | |
1da177e4 LT |
232 | stk->elem[i] = &stk->pool[i]; |
233 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
234 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
87c3a922 | 235 | stk->elem[i]->cmdindex = i; |
1da177e4 | 236 | } |
8a4ec67b | 237 | stk->top = stk->nelems-1; |
1da177e4 LT |
238 | return 0; |
239 | } | |
240 | ||
241 | static void | |
f70dba83 | 242 | scsi_cmd_stack_free(ctlr_info_t *h) |
1da177e4 LT |
243 | { |
244 | struct cciss_scsi_adapter_data_t *sa; | |
245 | struct cciss_scsi_cmd_stack_t *stk; | |
246 | size_t size; | |
247 | ||
f70dba83 | 248 | sa = h->scsi_ctlr; |
1da177e4 | 249 | stk = &sa->cmd_stack; |
8a4ec67b | 250 | if (stk->top != stk->nelems-1) { |
b2a4a43d SC |
251 | dev_warn(&h->pdev->dev, |
252 | "bug: %d scsi commands are still outstanding.\n", | |
8a4ec67b | 253 | stk->nelems - stk->top); |
1da177e4 | 254 | } |
8a4ec67b | 255 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems; |
1da177e4 | 256 | |
f70dba83 | 257 | pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle); |
1da177e4 | 258 | stk->pool = NULL; |
8a4ec67b SC |
259 | cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems); |
260 | kfree(stk->elem); | |
261 | stk->elem = NULL; | |
1da177e4 LT |
262 | } |
263 | ||
400bb236 | 264 | #if 0 |
1da177e4 LT |
265 | static int xmargin=8; |
266 | static int amargin=60; | |
267 | ||
268 | static void | |
269 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
270 | { | |
271 | ||
272 | int i; | |
273 | unsigned char *x; | |
274 | ||
275 | if (hex) | |
276 | { | |
277 | x = c; | |
278 | for (i=0;i<len;i++) | |
279 | { | |
280 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
281 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
282 | printk(" %02x", *x); | |
283 | x++; | |
284 | } | |
285 | printk("\n"); | |
286 | } | |
287 | if (ascii) | |
288 | { | |
289 | x = c; | |
290 | for (i=0;i<len;i++) | |
291 | { | |
292 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
293 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
294 | if (*x > 26 && *x < 128) printk("%c", *x); | |
295 | else printk("."); | |
296 | x++; | |
297 | } | |
298 | printk("\n"); | |
299 | } | |
300 | } | |
301 | ||
302 | static void | |
303 | print_cmd(CommandList_struct *cp) | |
304 | { | |
305 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
306 | printk("sglist:%d\n", cp->Header.SGList); | |
307 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
308 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
309 | cp->Header.Tag.lower); | |
310 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
311 | cp->Header.LUN.LunAddrBytes[0], | |
312 | cp->Header.LUN.LunAddrBytes[1], | |
313 | cp->Header.LUN.LunAddrBytes[2], | |
314 | cp->Header.LUN.LunAddrBytes[3], | |
315 | cp->Header.LUN.LunAddrBytes[4], | |
316 | cp->Header.LUN.LunAddrBytes[5], | |
317 | cp->Header.LUN.LunAddrBytes[6], | |
318 | cp->Header.LUN.LunAddrBytes[7]); | |
319 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
320 | printk("Type:%d\n",cp->Request.Type.Type); | |
321 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
322 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
323 | printk("Timeout:%d\n",cp->Request.Timeout); | |
324 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
325 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
326 | cp->Request.CDB[0], cp->Request.CDB[1], | |
327 | cp->Request.CDB[2], cp->Request.CDB[3], | |
328 | cp->Request.CDB[4], cp->Request.CDB[5], | |
329 | cp->Request.CDB[6], cp->Request.CDB[7], | |
330 | cp->Request.CDB[8], cp->Request.CDB[9], | |
331 | cp->Request.CDB[10], cp->Request.CDB[11], | |
332 | cp->Request.CDB[12], cp->Request.CDB[13], | |
333 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
334 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
335 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
336 | cp->ErrDesc.Len); | |
337 | printk("sgs..........Errorinfo:\n"); | |
338 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
339 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
340 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
341 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
342 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
343 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
344 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
345 | ||
346 | } | |
347 | ||
348 | #endif | |
349 | ||
350 | static int | |
f70dba83 | 351 | find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun) |
1da177e4 LT |
352 | { |
353 | /* finds an unused bus, target, lun for a new device */ | |
f70dba83 | 354 | /* assumes h->scsi_ctlr->lock is held */ |
1da177e4 LT |
355 | int i, found=0; |
356 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
357 | ||
358 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
359 | ||
360 | target_taken[SELF_SCSI_ID] = 1; | |
f70dba83 SC |
361 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) |
362 | target_taken[ccissscsi[h->ctlr].dev[i].target] = 1; | |
1da177e4 | 363 | |
f70dba83 | 364 | for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) { |
1da177e4 LT |
365 | if (!target_taken[i]) { |
366 | *bus = 0; *target=i; *lun = 0; found=1; | |
367 | break; | |
368 | } | |
369 | } | |
370 | return (!found); | |
371 | } | |
f4a93bcd MM |
372 | struct scsi2map { |
373 | char scsi3addr[8]; | |
374 | int bus, target, lun; | |
375 | }; | |
1da177e4 LT |
376 | |
377 | static int | |
f70dba83 | 378 | cciss_scsi_add_entry(ctlr_info_t *h, int hostno, |
905bd78f | 379 | struct cciss_scsi_dev_t *device, |
f4a93bcd | 380 | struct scsi2map *added, int *nadded) |
1da177e4 | 381 | { |
f70dba83 SC |
382 | /* assumes h->scsi_ctlr->lock is held */ |
383 | int n = ccissscsi[h->ctlr].ndevices; | |
1da177e4 | 384 | struct cciss_scsi_dev_t *sd; |
935dc8d7 MM |
385 | int i, bus, target, lun; |
386 | unsigned char addr1[8], addr2[8]; | |
1da177e4 LT |
387 | |
388 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
b2a4a43d SC |
389 | dev_warn(&h->pdev->dev, "Too many devices, " |
390 | "some will be inaccessible.\n"); | |
1da177e4 LT |
391 | return -1; |
392 | } | |
f4a93bcd | 393 | |
935dc8d7 MM |
394 | bus = target = -1; |
395 | lun = 0; | |
396 | /* Is this device a non-zero lun of a multi-lun device */ | |
397 | /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ | |
905bd78f | 398 | if (device->scsi3addr[4] != 0) { |
935dc8d7 MM |
399 | /* Search through our list and find the device which */ |
400 | /* has the same 8 byte LUN address, excepting byte 4. */ | |
401 | /* Assign the same bus and target for this new LUN. */ | |
402 | /* Use the logical unit number from the firmware. */ | |
905bd78f | 403 | memcpy(addr1, device->scsi3addr, 8); |
935dc8d7 MM |
404 | addr1[4] = 0; |
405 | for (i = 0; i < n; i++) { | |
f70dba83 | 406 | sd = &ccissscsi[h->ctlr].dev[i]; |
935dc8d7 MM |
407 | memcpy(addr2, sd->scsi3addr, 8); |
408 | addr2[4] = 0; | |
409 | /* differ only in byte 4? */ | |
410 | if (memcmp(addr1, addr2, 8) == 0) { | |
411 | bus = sd->bus; | |
412 | target = sd->target; | |
905bd78f | 413 | lun = device->scsi3addr[4]; |
935dc8d7 MM |
414 | break; |
415 | } | |
416 | } | |
417 | } | |
418 | ||
f70dba83 | 419 | sd = &ccissscsi[h->ctlr].dev[n]; |
935dc8d7 | 420 | if (lun == 0) { |
f70dba83 | 421 | if (find_bus_target_lun(h, |
935dc8d7 MM |
422 | &sd->bus, &sd->target, &sd->lun) != 0) |
423 | return -1; | |
424 | } else { | |
425 | sd->bus = bus; | |
426 | sd->target = target; | |
427 | sd->lun = lun; | |
428 | } | |
f4a93bcd MM |
429 | added[*nadded].bus = sd->bus; |
430 | added[*nadded].target = sd->target; | |
431 | added[*nadded].lun = sd->lun; | |
432 | (*nadded)++; | |
433 | ||
905bd78f | 434 | memcpy(sd->scsi3addr, device->scsi3addr, 8); |
435 | memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); | |
436 | memcpy(sd->revision, device->revision, sizeof(sd->revision)); | |
437 | memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); | |
438 | sd->devtype = device->devtype; | |
439 | ||
f70dba83 | 440 | ccissscsi[h->ctlr].ndevices++; |
1da177e4 LT |
441 | |
442 | /* initially, (before registering with scsi layer) we don't | |
443 | know our hostno and we don't want to print anything first | |
444 | time anyway (the scsi layer's inquiries will show that info) */ | |
445 | if (hostno != -1) | |
b2a4a43d SC |
446 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n", |
447 | scsi_device_type(sd->devtype), hostno, | |
1da177e4 LT |
448 | sd->bus, sd->target, sd->lun); |
449 | return 0; | |
450 | } | |
451 | ||
452 | static void | |
f70dba83 | 453 | cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry, |
f4a93bcd | 454 | struct scsi2map *removed, int *nremoved) |
1da177e4 | 455 | { |
f70dba83 | 456 | /* assumes h->ctlr]->scsi_ctlr->lock is held */ |
1da177e4 LT |
457 | int i; |
458 | struct cciss_scsi_dev_t sd; | |
459 | ||
460 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
f70dba83 | 461 | sd = ccissscsi[h->ctlr].dev[entry]; |
f4a93bcd MM |
462 | removed[*nremoved].bus = sd.bus; |
463 | removed[*nremoved].target = sd.target; | |
464 | removed[*nremoved].lun = sd.lun; | |
465 | (*nremoved)++; | |
f70dba83 SC |
466 | for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++) |
467 | ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1]; | |
468 | ccissscsi[h->ctlr].ndevices--; | |
b2a4a43d SC |
469 | dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n", |
470 | scsi_device_type(sd.devtype), hostno, | |
1da177e4 LT |
471 | sd.bus, sd.target, sd.lun); |
472 | } | |
473 | ||
474 | ||
475 | #define SCSI3ADDR_EQ(a,b) ( \ | |
476 | (a)[7] == (b)[7] && \ | |
477 | (a)[6] == (b)[6] && \ | |
478 | (a)[5] == (b)[5] && \ | |
479 | (a)[4] == (b)[4] && \ | |
480 | (a)[3] == (b)[3] && \ | |
481 | (a)[2] == (b)[2] && \ | |
482 | (a)[1] == (b)[1] && \ | |
483 | (a)[0] == (b)[0]) | |
484 | ||
f70dba83 | 485 | static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr) |
f4a93bcd MM |
486 | { |
487 | /* called when scsi_add_device fails in order to re-adjust */ | |
488 | /* ccissscsi[] to match the mid layer's view. */ | |
489 | unsigned long flags; | |
490 | int i, j; | |
f70dba83 SC |
491 | CPQ_TAPE_LOCK(h, flags); |
492 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
f4a93bcd | 493 | if (memcmp(scsi3addr, |
f70dba83 SC |
494 | ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) { |
495 | for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++) | |
496 | ccissscsi[h->ctlr].dev[j] = | |
497 | ccissscsi[h->ctlr].dev[j+1]; | |
498 | ccissscsi[h->ctlr].ndevices--; | |
f4a93bcd MM |
499 | break; |
500 | } | |
501 | } | |
f70dba83 | 502 | CPQ_TAPE_UNLOCK(h, flags); |
f4a93bcd MM |
503 | } |
504 | ||
905bd78f | 505 | static int device_is_the_same(struct cciss_scsi_dev_t *dev1, |
506 | struct cciss_scsi_dev_t *dev2) | |
507 | { | |
508 | return dev1->devtype == dev2->devtype && | |
509 | memcmp(dev1->scsi3addr, dev2->scsi3addr, | |
510 | sizeof(dev1->scsi3addr)) == 0 && | |
511 | memcmp(dev1->device_id, dev2->device_id, | |
512 | sizeof(dev1->device_id)) == 0 && | |
513 | memcmp(dev1->vendor, dev2->vendor, | |
514 | sizeof(dev1->vendor)) == 0 && | |
515 | memcmp(dev1->model, dev2->model, | |
516 | sizeof(dev1->model)) == 0 && | |
517 | memcmp(dev1->revision, dev2->revision, | |
518 | sizeof(dev1->revision)) == 0; | |
519 | } | |
520 | ||
1da177e4 | 521 | static int |
f70dba83 | 522 | adjust_cciss_scsi_table(ctlr_info_t *h, int hostno, |
1da177e4 LT |
523 | struct cciss_scsi_dev_t sd[], int nsds) |
524 | { | |
525 | /* sd contains scsi3 addresses and devtypes, but | |
526 | bus target and lun are not filled in. This funciton | |
527 | takes what's in sd to be the current and adjusts | |
528 | ccissscsi[] to be in line with what's in sd. */ | |
529 | ||
530 | int i,j, found, changes=0; | |
531 | struct cciss_scsi_dev_t *csd; | |
532 | unsigned long flags; | |
f4a93bcd MM |
533 | struct scsi2map *added, *removed; |
534 | int nadded, nremoved; | |
535 | struct Scsi_Host *sh = NULL; | |
536 | ||
537 | added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
538 | GFP_KERNEL); | |
539 | removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, | |
540 | GFP_KERNEL); | |
541 | ||
542 | if (!added || !removed) { | |
b2a4a43d SC |
543 | dev_warn(&h->pdev->dev, |
544 | "Out of memory in adjust_cciss_scsi_table\n"); | |
f4a93bcd MM |
545 | goto free_and_out; |
546 | } | |
1da177e4 | 547 | |
f70dba83 | 548 | CPQ_TAPE_LOCK(h, flags); |
1da177e4 | 549 | |
f4a93bcd | 550 | if (hostno != -1) /* if it's not the first time... */ |
f70dba83 | 551 | sh = h->scsi_ctlr->scsi_host; |
f4a93bcd | 552 | |
1da177e4 LT |
553 | /* find any devices in ccissscsi[] that are not in |
554 | sd[] and remove them from ccissscsi[] */ | |
555 | ||
556 | i = 0; | |
f4a93bcd MM |
557 | nremoved = 0; |
558 | nadded = 0; | |
f70dba83 SC |
559 | while (i < ccissscsi[h->ctlr].ndevices) { |
560 | csd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
561 | found=0; |
562 | for (j=0;j<nsds;j++) { | |
563 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
564 | csd->scsi3addr)) { | |
905bd78f | 565 | if (device_is_the_same(&sd[j], csd)) |
1da177e4 LT |
566 | found=2; |
567 | else | |
568 | found=1; | |
569 | break; | |
570 | } | |
571 | } | |
572 | ||
573 | if (found == 0) { /* device no longer present. */ | |
574 | changes++; | |
f70dba83 | 575 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
576 | removed, &nremoved); |
577 | /* remove ^^^, hence i not incremented */ | |
905bd78f | 578 | } else if (found == 1) { /* device is different in some way */ |
1da177e4 | 579 | changes++; |
b2a4a43d SC |
580 | dev_info(&h->pdev->dev, |
581 | "device c%db%dt%dl%d has changed.\n", | |
582 | hostno, csd->bus, csd->target, csd->lun); | |
f70dba83 | 583 | cciss_scsi_remove_entry(h, hostno, i, |
f4a93bcd MM |
584 | removed, &nremoved); |
585 | /* remove ^^^, hence i not incremented */ | |
f70dba83 | 586 | if (cciss_scsi_add_entry(h, hostno, &sd[j], |
f4a93bcd MM |
587 | added, &nadded) != 0) |
588 | /* we just removed one, so add can't fail. */ | |
589 | BUG(); | |
1da177e4 | 590 | csd->devtype = sd[j].devtype; |
905bd78f | 591 | memcpy(csd->device_id, sd[j].device_id, |
592 | sizeof(csd->device_id)); | |
593 | memcpy(csd->vendor, sd[j].vendor, | |
594 | sizeof(csd->vendor)); | |
595 | memcpy(csd->model, sd[j].model, | |
596 | sizeof(csd->model)); | |
597 | memcpy(csd->revision, sd[j].revision, | |
598 | sizeof(csd->revision)); | |
1da177e4 LT |
599 | } else /* device is same as it ever was, */ |
600 | i++; /* so just move along. */ | |
601 | } | |
602 | ||
603 | /* Now, make sure every device listed in sd[] is also | |
604 | listed in ccissscsi[], adding them if they aren't found */ | |
605 | ||
606 | for (i=0;i<nsds;i++) { | |
607 | found=0; | |
f70dba83 SC |
608 | for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) { |
609 | csd = &ccissscsi[h->ctlr].dev[j]; | |
1da177e4 LT |
610 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, |
611 | csd->scsi3addr)) { | |
905bd78f | 612 | if (device_is_the_same(&sd[i], csd)) |
1da177e4 LT |
613 | found=2; /* found device */ |
614 | else | |
615 | found=1; /* found a bug. */ | |
616 | break; | |
617 | } | |
618 | } | |
619 | if (!found) { | |
620 | changes++; | |
f70dba83 | 621 | if (cciss_scsi_add_entry(h, hostno, &sd[i], |
f4a93bcd | 622 | added, &nadded) != 0) |
1da177e4 LT |
623 | break; |
624 | } else if (found == 1) { | |
625 | /* should never happen... */ | |
626 | changes++; | |
b2a4a43d SC |
627 | dev_warn(&h->pdev->dev, |
628 | "device unexpectedly changed\n"); | |
1da177e4 LT |
629 | /* but if it does happen, we just ignore that device */ |
630 | } | |
631 | } | |
f70dba83 | 632 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 | 633 | |
f4a93bcd MM |
634 | /* Don't notify scsi mid layer of any changes the first time through */ |
635 | /* (or if there are no changes) scsi_scan_host will do it later the */ | |
636 | /* first time through. */ | |
637 | if (hostno == -1 || !changes) | |
638 | goto free_and_out; | |
639 | ||
640 | /* Notify scsi mid layer of any removed devices */ | |
641 | for (i = 0; i < nremoved; i++) { | |
642 | struct scsi_device *sdev = | |
643 | scsi_device_lookup(sh, removed[i].bus, | |
644 | removed[i].target, removed[i].lun); | |
645 | if (sdev != NULL) { | |
646 | scsi_remove_device(sdev); | |
647 | scsi_device_put(sdev); | |
648 | } else { | |
649 | /* We don't expect to get here. */ | |
650 | /* future cmds to this device will get selection */ | |
651 | /* timeout as if the device was gone. */ | |
b2a4a43d | 652 | dev_warn(&h->pdev->dev, "didn't find " |
f4a93bcd | 653 | "c%db%dt%dl%d\n for removal.", |
b2a4a43d | 654 | hostno, removed[i].bus, |
f4a93bcd MM |
655 | removed[i].target, removed[i].lun); |
656 | } | |
657 | } | |
658 | ||
659 | /* Notify scsi mid layer of any added devices */ | |
660 | for (i = 0; i < nadded; i++) { | |
661 | int rc; | |
662 | rc = scsi_add_device(sh, added[i].bus, | |
663 | added[i].target, added[i].lun); | |
664 | if (rc == 0) | |
665 | continue; | |
b2a4a43d | 666 | dev_warn(&h->pdev->dev, "scsi_add_device " |
f4a93bcd | 667 | "c%db%dt%dl%d failed, device not added.\n", |
b2a4a43d | 668 | hostno, added[i].bus, added[i].target, added[i].lun); |
f4a93bcd MM |
669 | /* now we have to remove it from ccissscsi, */ |
670 | /* since it didn't get added to scsi mid layer */ | |
f70dba83 | 671 | fixup_botched_add(h, added[i].scsi3addr); |
f4a93bcd | 672 | } |
1da177e4 | 673 | |
f4a93bcd MM |
674 | free_and_out: |
675 | kfree(added); | |
676 | kfree(removed); | |
1da177e4 LT |
677 | return 0; |
678 | } | |
679 | ||
680 | static int | |
f70dba83 | 681 | lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr) |
1da177e4 LT |
682 | { |
683 | int i; | |
684 | struct cciss_scsi_dev_t *sd; | |
685 | unsigned long flags; | |
686 | ||
f70dba83 SC |
687 | CPQ_TAPE_LOCK(h, flags); |
688 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { | |
689 | sd = &ccissscsi[h->ctlr].dev[i]; | |
1da177e4 LT |
690 | if (sd->bus == bus && |
691 | sd->target == target && | |
692 | sd->lun == lun) { | |
693 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
f70dba83 | 694 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
695 | return 0; |
696 | } | |
697 | } | |
f70dba83 | 698 | CPQ_TAPE_UNLOCK(h, flags); |
1da177e4 LT |
699 | return -1; |
700 | } | |
701 | ||
702 | static void | |
f70dba83 | 703 | cciss_scsi_setup(ctlr_info_t *h) |
1da177e4 LT |
704 | { |
705 | struct cciss_scsi_adapter_data_t * shba; | |
706 | ||
f70dba83 | 707 | ccissscsi[h->ctlr].ndevices = 0; |
1da177e4 LT |
708 | shba = (struct cciss_scsi_adapter_data_t *) |
709 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
710 | if (shba == NULL) | |
711 | return; | |
712 | shba->scsi_host = NULL; | |
713 | spin_lock_init(&shba->lock); | |
714 | shba->registered = 0; | |
f70dba83 | 715 | if (scsi_cmd_stack_setup(h, shba) != 0) { |
1da177e4 LT |
716 | kfree(shba); |
717 | shba = NULL; | |
718 | } | |
f70dba83 | 719 | h->scsi_ctlr = shba; |
1da177e4 LT |
720 | return; |
721 | } | |
722 | ||
f70dba83 SC |
723 | static void complete_scsi_command(CommandList_struct *c, int timeout, |
724 | __u32 tag) | |
1da177e4 LT |
725 | { |
726 | struct scsi_cmnd *cmd; | |
f70dba83 | 727 | ctlr_info_t *h; |
1da177e4 LT |
728 | ErrorInfo_struct *ei; |
729 | ||
f70dba83 | 730 | ei = c->err_info; |
1da177e4 LT |
731 | |
732 | /* First, see if it was a message rather than a command */ | |
f70dba83 SC |
733 | if (c->Request.Type.Type == TYPE_MSG) { |
734 | c->cmd_type = CMD_MSG_DONE; | |
1da177e4 LT |
735 | return; |
736 | } | |
737 | ||
f70dba83 SC |
738 | cmd = (struct scsi_cmnd *) c->scsi_cmd; |
739 | h = hba[c->ctlr]; | |
1da177e4 | 740 | |
41ce639a | 741 | scsi_dma_unmap(cmd); |
f70dba83 SC |
742 | if (c->Header.SGTotal > h->max_cmd_sgentries) |
743 | cciss_unmap_sg_chain_block(h, c); | |
1da177e4 LT |
744 | |
745 | cmd->result = (DID_OK << 16); /* host byte */ | |
746 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
747 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
748 | ||
749 | cmd->result |= (ei->ScsiStatus); | |
750 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
751 | ||
752 | /* copy the sense data whether we need to or not. */ | |
753 | ||
754 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
755 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
756 | SCSI_SENSE_BUFFERSIZE : | |
757 | ei->SenseLen); | |
41ce639a | 758 | scsi_set_resid(cmd, ei->ResidualCnt); |
1da177e4 LT |
759 | |
760 | if(ei->CommandStatus != 0) | |
761 | { /* an error has occurred */ | |
762 | switch(ei->CommandStatus) | |
763 | { | |
764 | case CMD_TARGET_STATUS: | |
765 | /* Pass it up to the upper layers... */ | |
766 | if( ei->ScsiStatus) | |
767 | { | |
768 | #if 0 | |
769 | printk(KERN_WARNING "cciss: cmd %p " | |
f70dba83 SC |
770 | "has SCSI Status = %x\n", |
771 | c, ei->ScsiStatus); | |
1da177e4 | 772 | #endif |
b0e15f6d | 773 | cmd->result |= (ei->ScsiStatus << 1); |
1da177e4 LT |
774 | } |
775 | else { /* scsi status is zero??? How??? */ | |
776 | ||
777 | /* Ordinarily, this case should never happen, but there is a bug | |
778 | in some released firmware revisions that allows it to happen | |
779 | if, for example, a 4100 backplane loses power and the tape | |
780 | drive is in it. We assume that it's a fatal error of some | |
781 | kind because we can't show that it wasn't. We will make it | |
782 | look like selection timeout since that is the most common | |
783 | reason for this to occur, and it's severe enough. */ | |
784 | ||
785 | cmd->result = DID_NO_CONNECT << 16; | |
786 | } | |
787 | break; | |
788 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
789 | break; | |
790 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 791 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 792 | " completed with data overrun " |
f70dba83 | 793 | "reported\n", c); |
1da177e4 LT |
794 | break; |
795 | case CMD_INVALID: { | |
f70dba83 SC |
796 | /* print_bytes(c, sizeof(*c), 1, 0); |
797 | print_cmd(c); */ | |
1da177e4 LT |
798 | /* We get CMD_INVALID if you address a non-existent tape drive instead |
799 | of a selection timeout (no response). You will see this if you yank | |
800 | out a tape drive, then try to access it. This is kind of a shame | |
801 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
802 | get interpreted as a missing target. */ | |
803 | cmd->result = DID_NO_CONNECT << 16; | |
804 | } | |
805 | break; | |
806 | case CMD_PROTOCOL_ERR: | |
b2a4a43d SC |
807 | dev_warn(&h->pdev->dev, |
808 | "%p has protocol error\n", c); | |
1da177e4 LT |
809 | break; |
810 | case CMD_HARDWARE_ERR: | |
811 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
812 | dev_warn(&h->pdev->dev, |
813 | "%p had hardware error\n", c); | |
1da177e4 LT |
814 | break; |
815 | case CMD_CONNECTION_LOST: | |
816 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
817 | dev_warn(&h->pdev->dev, |
818 | "%p had connection lost\n", c); | |
1da177e4 LT |
819 | break; |
820 | case CMD_ABORTED: | |
821 | cmd->result = DID_ABORT << 16; | |
b2a4a43d | 822 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
823 | break; |
824 | case CMD_ABORT_FAILED: | |
825 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
826 | dev_warn(&h->pdev->dev, |
827 | "%p reports abort failed\n", c); | |
1da177e4 LT |
828 | break; |
829 | case CMD_UNSOLICITED_ABORT: | |
830 | cmd->result = DID_ABORT << 16; | |
6d9a4f9e | 831 | dev_warn(&h->pdev->dev, "%p aborted due to an " |
b2a4a43d | 832 | "unsolicited abort\n", c); |
1da177e4 LT |
833 | break; |
834 | case CMD_TIMEOUT: | |
835 | cmd->result = DID_TIME_OUT << 16; | |
b2a4a43d | 836 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 | 837 | break; |
6d9a4f9e SC |
838 | case CMD_UNABORTABLE: |
839 | cmd->result = DID_ERROR << 16; | |
840 | dev_warn(&h->pdev->dev, "c %p command " | |
841 | "unabortable\n", c); | |
842 | break; | |
1da177e4 LT |
843 | default: |
844 | cmd->result = DID_ERROR << 16; | |
b2a4a43d SC |
845 | dev_warn(&h->pdev->dev, |
846 | "%p returned unknown status %x\n", c, | |
1da177e4 LT |
847 | ei->CommandStatus); |
848 | } | |
849 | } | |
1da177e4 | 850 | cmd->scsi_done(cmd); |
f70dba83 | 851 | scsi_cmd_free(h, c); |
1da177e4 LT |
852 | } |
853 | ||
854 | static int | |
f70dba83 | 855 | cciss_scsi_detect(ctlr_info_t *h) |
1da177e4 LT |
856 | { |
857 | struct Scsi_Host *sh; | |
858 | int error; | |
859 | ||
860 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
861 | if (sh == NULL) | |
862 | goto fail; | |
863 | sh->io_port = 0; // good enough? FIXME, | |
864 | sh->n_io_port = 0; // I don't think we use these two... | |
865 | sh->this_id = SELF_SCSI_ID; | |
8a4ec67b | 866 | sh->can_queue = cciss_tape_cmds; |
f70dba83 | 867 | sh->sg_tablesize = h->maxsgentries; |
79600aad | 868 | sh->max_cmd_len = MAX_COMMAND_SIZE; |
1da177e4 LT |
869 | |
870 | ((struct cciss_scsi_adapter_data_t *) | |
f70dba83 SC |
871 | h->scsi_ctlr)->scsi_host = sh; |
872 | sh->hostdata[0] = (unsigned long) h; | |
873 | sh->irq = h->intr[SIMPLE_MODE_INT]; | |
1da177e4 | 874 | sh->unique_id = sh->irq; |
f70dba83 | 875 | error = scsi_add_host(sh, &h->pdev->dev); |
1da177e4 LT |
876 | if (error) |
877 | goto fail_host_put; | |
878 | scsi_scan_host(sh); | |
879 | return 1; | |
880 | ||
881 | fail_host_put: | |
882 | scsi_host_put(sh); | |
883 | fail: | |
884 | return 0; | |
885 | } | |
886 | ||
887 | static void | |
888 | cciss_unmap_one(struct pci_dev *pdev, | |
f70dba83 | 889 | CommandList_struct *c, |
1da177e4 LT |
890 | size_t buflen, |
891 | int data_direction) | |
892 | { | |
893 | u64bit addr64; | |
894 | ||
f70dba83 SC |
895 | addr64.val32.lower = c->SG[0].Addr.lower; |
896 | addr64.val32.upper = c->SG[0].Addr.upper; | |
1da177e4 LT |
897 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); |
898 | } | |
899 | ||
900 | static void | |
901 | cciss_map_one(struct pci_dev *pdev, | |
f70dba83 | 902 | CommandList_struct *c, |
1da177e4 LT |
903 | unsigned char *buf, |
904 | size_t buflen, | |
905 | int data_direction) | |
906 | { | |
907 | __u64 addr64; | |
908 | ||
909 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
f70dba83 | 910 | c->SG[0].Addr.lower = |
1da177e4 | 911 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); |
f70dba83 | 912 | c->SG[0].Addr.upper = |
1da177e4 | 913 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); |
f70dba83 SC |
914 | c->SG[0].Len = buflen; |
915 | c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
916 | c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
1da177e4 LT |
917 | } |
918 | ||
919 | static int | |
f70dba83 SC |
920 | cciss_scsi_do_simple_cmd(ctlr_info_t *h, |
921 | CommandList_struct *c, | |
1da177e4 LT |
922 | unsigned char *scsi3addr, |
923 | unsigned char *cdb, | |
924 | unsigned char cdblen, | |
925 | unsigned char *buf, int bufsize, | |
926 | int direction) | |
927 | { | |
6e9a4738 | 928 | DECLARE_COMPLETION_ONSTACK(wait); |
1da177e4 | 929 | |
f70dba83 SC |
930 | c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */ |
931 | c->scsi_cmd = NULL; | |
932 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
933 | memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN)); | |
934 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
935 | // Fill in the request block... |
936 | ||
937 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
938 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
939 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
940 | ||
f70dba83 SC |
941 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); |
942 | memcpy(c->Request.CDB, cdb, cdblen); | |
943 | c->Request.Timeout = 0; | |
944 | c->Request.CDBLen = cdblen; | |
945 | c->Request.Type.Type = TYPE_CMD; | |
946 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
947 | c->Request.Type.Direction = direction; | |
1da177e4 LT |
948 | |
949 | /* Fill in the SG list and do dma mapping */ | |
f70dba83 | 950 | cciss_map_one(h->pdev, c, (unsigned char *) buf, |
1da177e4 LT |
951 | bufsize, DMA_FROM_DEVICE); |
952 | ||
f70dba83 SC |
953 | c->waiting = &wait; |
954 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
955 | wait_for_completion(&wait); |
956 | ||
957 | /* undo the dma mapping */ | |
f70dba83 | 958 | cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE); |
1da177e4 LT |
959 | return(0); |
960 | } | |
961 | ||
962 | static void | |
b2a4a43d | 963 | cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c) |
1da177e4 LT |
964 | { |
965 | ErrorInfo_struct *ei; | |
966 | ||
f70dba83 | 967 | ei = c->err_info; |
1da177e4 LT |
968 | switch(ei->CommandStatus) |
969 | { | |
970 | case CMD_TARGET_STATUS: | |
b2a4a43d SC |
971 | dev_warn(&h->pdev->dev, |
972 | "cmd %p has completed with errors\n", c); | |
973 | dev_warn(&h->pdev->dev, | |
974 | "cmd %p has SCSI Status = %x\n", | |
975 | c, ei->ScsiStatus); | |
1da177e4 | 976 | if (ei->ScsiStatus == 0) |
b2a4a43d SC |
977 | dev_warn(&h->pdev->dev, |
978 | "SCSI status is abnormally zero. " | |
1da177e4 LT |
979 | "(probably indicates selection timeout " |
980 | "reported incorrectly due to a known " | |
981 | "firmware bug, circa July, 2001.)\n"); | |
982 | break; | |
983 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
b2a4a43d | 984 | dev_info(&h->pdev->dev, "UNDERRUN\n"); |
1da177e4 LT |
985 | break; |
986 | case CMD_DATA_OVERRUN: | |
b2a4a43d | 987 | dev_warn(&h->pdev->dev, "%p has" |
1da177e4 | 988 | " completed with data overrun " |
f70dba83 | 989 | "reported\n", c); |
1da177e4 LT |
990 | break; |
991 | case CMD_INVALID: { | |
992 | /* controller unfortunately reports SCSI passthru's */ | |
993 | /* to non-existent targets as invalid commands. */ | |
b2a4a43d SC |
994 | dev_warn(&h->pdev->dev, |
995 | "%p is reported invalid (probably means " | |
f70dba83 SC |
996 | "target device no longer present)\n", c); |
997 | /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0); | |
998 | print_cmd(c); */ | |
1da177e4 LT |
999 | } |
1000 | break; | |
1001 | case CMD_PROTOCOL_ERR: | |
b2a4a43d | 1002 | dev_warn(&h->pdev->dev, "%p has protocol error\n", c); |
1da177e4 LT |
1003 | break; |
1004 | case CMD_HARDWARE_ERR: | |
1005 | /* cmd->result = DID_ERROR << 16; */ | |
b2a4a43d | 1006 | dev_warn(&h->pdev->dev, "%p had hardware error\n", c); |
1da177e4 LT |
1007 | break; |
1008 | case CMD_CONNECTION_LOST: | |
b2a4a43d | 1009 | dev_warn(&h->pdev->dev, "%p had connection lost\n", c); |
1da177e4 LT |
1010 | break; |
1011 | case CMD_ABORTED: | |
b2a4a43d | 1012 | dev_warn(&h->pdev->dev, "%p was aborted\n", c); |
1da177e4 LT |
1013 | break; |
1014 | case CMD_ABORT_FAILED: | |
b2a4a43d SC |
1015 | dev_warn(&h->pdev->dev, |
1016 | "%p reports abort failed\n", c); | |
1da177e4 LT |
1017 | break; |
1018 | case CMD_UNSOLICITED_ABORT: | |
b2a4a43d | 1019 | dev_warn(&h->pdev->dev, |
6d9a4f9e | 1020 | "%p aborted due to an unsolicited abort\n", c); |
1da177e4 LT |
1021 | break; |
1022 | case CMD_TIMEOUT: | |
b2a4a43d | 1023 | dev_warn(&h->pdev->dev, "%p timedout\n", c); |
1da177e4 | 1024 | break; |
6d9a4f9e SC |
1025 | case CMD_UNABORTABLE: |
1026 | dev_warn(&h->pdev->dev, | |
1027 | "%p unabortable\n", c); | |
1028 | break; | |
1da177e4 | 1029 | default: |
b2a4a43d SC |
1030 | dev_warn(&h->pdev->dev, |
1031 | "%p returned unknown status %x\n", | |
1032 | c, ei->CommandStatus); | |
1da177e4 LT |
1033 | } |
1034 | } | |
1035 | ||
1036 | static int | |
f70dba83 | 1037 | cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1038 | unsigned char page, unsigned char *buf, |
1039 | unsigned char bufsize) | |
1da177e4 LT |
1040 | { |
1041 | int rc; | |
f70dba83 | 1042 | CommandList_struct *c; |
1da177e4 LT |
1043 | char cdb[6]; |
1044 | ErrorInfo_struct *ei; | |
1045 | unsigned long flags; | |
1046 | ||
f70dba83 SC |
1047 | spin_lock_irqsave(&h->lock, flags); |
1048 | c = scsi_cmd_alloc(h); | |
1049 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 | 1050 | |
f70dba83 | 1051 | if (c == NULL) { /* trouble... */ |
1da177e4 LT |
1052 | printk("cmd_alloc returned NULL!\n"); |
1053 | return -1; | |
1054 | } | |
1055 | ||
f70dba83 | 1056 | ei = c->err_info; |
1da177e4 LT |
1057 | |
1058 | cdb[0] = CISS_INQUIRY; | |
905bd78f | 1059 | cdb[1] = (page != 0); |
1060 | cdb[2] = page; | |
1da177e4 | 1061 | cdb[3] = 0; |
47922d06 | 1062 | cdb[4] = bufsize; |
1da177e4 | 1063 | cdb[5] = 0; |
f70dba83 | 1064 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb, |
47922d06 | 1065 | 6, buf, bufsize, XFER_READ); |
1da177e4 LT |
1066 | |
1067 | if (rc != 0) return rc; /* something went wrong */ | |
1068 | ||
1069 | if (ei->CommandStatus != 0 && | |
1070 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1071 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1072 | rc = -1; |
1073 | } | |
f70dba83 SC |
1074 | spin_lock_irqsave(&h->lock, flags); |
1075 | scsi_cmd_free(h, c); | |
1076 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1077 | return rc; |
1078 | } | |
1079 | ||
905bd78f | 1080 | /* Get the device id from inquiry page 0x83 */ |
f70dba83 | 1081 | static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr, |
905bd78f | 1082 | unsigned char *device_id, int buflen) |
1083 | { | |
1084 | int rc; | |
1085 | unsigned char *buf; | |
1086 | ||
1087 | if (buflen > 16) | |
1088 | buflen = 16; | |
1089 | buf = kzalloc(64, GFP_KERNEL); | |
1090 | if (!buf) | |
1091 | return -1; | |
f70dba83 | 1092 | rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); |
905bd78f | 1093 | if (rc == 0) |
1094 | memcpy(device_id, &buf[8], buflen); | |
1095 | kfree(buf); | |
1096 | return rc != 0; | |
1097 | } | |
1098 | ||
1da177e4 | 1099 | static int |
f70dba83 | 1100 | cciss_scsi_do_report_phys_luns(ctlr_info_t *h, |
1da177e4 LT |
1101 | ReportLunData_struct *buf, int bufsize) |
1102 | { | |
1103 | int rc; | |
f70dba83 | 1104 | CommandList_struct *c; |
1da177e4 LT |
1105 | unsigned char cdb[12]; |
1106 | unsigned char scsi3addr[8]; | |
1107 | ErrorInfo_struct *ei; | |
1108 | unsigned long flags; | |
1109 | ||
f70dba83 SC |
1110 | spin_lock_irqsave(&h->lock, flags); |
1111 | c = scsi_cmd_alloc(h); | |
1112 | spin_unlock_irqrestore(&h->lock, flags); | |
1113 | if (c == NULL) { /* trouble... */ | |
1da177e4 LT |
1114 | printk("cmd_alloc returned NULL!\n"); |
1115 | return -1; | |
1116 | } | |
1117 | ||
1118 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
1119 | cdb[0] = CISS_REPORT_PHYS; | |
1120 | cdb[1] = 0; | |
1121 | cdb[2] = 0; | |
1122 | cdb[3] = 0; | |
1123 | cdb[4] = 0; | |
1124 | cdb[5] = 0; | |
1125 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
1126 | cdb[7] = (bufsize >> 16) & 0xFF; | |
1127 | cdb[8] = (bufsize >> 8) & 0xFF; | |
1128 | cdb[9] = bufsize & 0xFF; | |
1129 | cdb[10] = 0; | |
1130 | cdb[11] = 0; | |
1131 | ||
f70dba83 | 1132 | rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, |
1da177e4 LT |
1133 | cdb, 12, |
1134 | (unsigned char *) buf, | |
1135 | bufsize, XFER_READ); | |
1136 | ||
1137 | if (rc != 0) return rc; /* something went wrong */ | |
1138 | ||
f70dba83 | 1139 | ei = c->err_info; |
1da177e4 LT |
1140 | if (ei->CommandStatus != 0 && |
1141 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
b2a4a43d | 1142 | cciss_scsi_interpret_error(h, c); |
1da177e4 LT |
1143 | rc = -1; |
1144 | } | |
f70dba83 SC |
1145 | spin_lock_irqsave(&h->lock, flags); |
1146 | scsi_cmd_free(h, c); | |
1147 | spin_unlock_irqrestore(&h->lock, flags); | |
1da177e4 LT |
1148 | return rc; |
1149 | } | |
1150 | ||
1151 | static void | |
f70dba83 | 1152 | cciss_update_non_disk_devices(ctlr_info_t *h, int hostno) |
1da177e4 LT |
1153 | { |
1154 | /* the idea here is we could get notified from /proc | |
1155 | that some devices have changed, so we do a report | |
1156 | physical luns cmd, and adjust our list of devices | |
1157 | accordingly. (We can't rely on the scsi-mid layer just | |
1158 | doing inquiries, because the "busses" that the scsi | |
1159 | mid-layer probes are totally fabricated by this driver, | |
1160 | so new devices wouldn't show up. | |
1161 | ||
1162 | the scsi3addr's of devices won't change so long as the | |
1163 | adapter is not reset. That means we can rescan and | |
1164 | tell which devices we already know about, vs. new | |
1165 | devices, vs. disappearing devices. | |
1166 | ||
1167 | Also, if you yank out a tape drive, then put in a disk | |
1168 | in it's place, (say, a configured volume from another | |
1169 | array controller for instance) _don't_ poke this driver | |
1170 | (so it thinks it's still a tape, but _do_ poke the scsi | |
1171 | mid layer, so it does an inquiry... the scsi mid layer | |
1172 | will see the physical disk. This would be bad. Need to | |
1173 | think about how to prevent that. One idea would be to | |
1174 | snoop all scsi responses and if an inquiry repsonse comes | |
1175 | back that reports a disk, chuck it an return selection | |
1176 | timeout instead and adjust our table... Not sure i like | |
1177 | that though. | |
1178 | ||
1179 | */ | |
47922d06 MM |
1180 | #define OBDR_TAPE_INQ_SIZE 49 |
1181 | #define OBDR_TAPE_SIG "$DR-10" | |
1da177e4 | 1182 | ReportLunData_struct *ld_buff; |
47922d06 | 1183 | unsigned char *inq_buff; |
1da177e4 | 1184 | unsigned char scsi3addr[8]; |
1da177e4 LT |
1185 | __u32 num_luns=0; |
1186 | unsigned char *ch; | |
905bd78f | 1187 | struct cciss_scsi_dev_t *currentsd, *this_device; |
1da177e4 LT |
1188 | int ncurrent=0; |
1189 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1190 | int i; | |
1191 | ||
06ff37ff | 1192 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
47922d06 | 1193 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
905bd78f | 1194 | currentsd = kzalloc(sizeof(*currentsd) * |
1195 | (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); | |
1196 | if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { | |
1197 | printk(KERN_ERR "cciss: out of memory\n"); | |
1198 | goto out; | |
1da177e4 | 1199 | } |
905bd78f | 1200 | this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
f70dba83 | 1201 | if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) { |
1da177e4 LT |
1202 | ch = &ld_buff->LUNListLength[0]; |
1203 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1204 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1205 | printk(KERN_WARNING | |
1206 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1207 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1208 | num_luns - CISS_MAX_PHYS_LUN); | |
1209 | num_luns = CISS_MAX_PHYS_LUN; | |
1210 | } | |
1211 | } | |
1212 | else { | |
1213 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1214 | goto out; | |
1215 | } | |
1216 | ||
1217 | ||
1218 | /* adjust our table of devices */ | |
905bd78f | 1219 | for (i = 0; i < num_luns; i++) { |
1da177e4 LT |
1220 | /* for each physical lun, do an inquiry */ |
1221 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
47922d06 | 1222 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
1da177e4 LT |
1223 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
1224 | ||
f70dba83 | 1225 | if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, |
905bd78f | 1226 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) |
1da177e4 | 1227 | /* Inquiry failed (msg printed already) */ |
905bd78f | 1228 | continue; /* so we will skip this device. */ |
1229 | ||
1230 | this_device->devtype = (inq_buff[0] & 0x1f); | |
1231 | this_device->bus = -1; | |
1232 | this_device->target = -1; | |
1233 | this_device->lun = -1; | |
1234 | memcpy(this_device->scsi3addr, scsi3addr, 8); | |
1235 | memcpy(this_device->vendor, &inq_buff[8], | |
1236 | sizeof(this_device->vendor)); | |
1237 | memcpy(this_device->model, &inq_buff[16], | |
1238 | sizeof(this_device->model)); | |
1239 | memcpy(this_device->revision, &inq_buff[32], | |
1240 | sizeof(this_device->revision)); | |
1241 | memset(this_device->device_id, 0, | |
1242 | sizeof(this_device->device_id)); | |
f70dba83 | 1243 | cciss_scsi_get_device_id(h, scsi3addr, |
905bd78f | 1244 | this_device->device_id, sizeof(this_device->device_id)); |
1245 | ||
1246 | switch (this_device->devtype) | |
1da177e4 | 1247 | { |
47922d06 MM |
1248 | case 0x05: /* CD-ROM */ { |
1249 | ||
1250 | /* We don't *really* support actual CD-ROM devices, | |
1251 | * just this "One Button Disaster Recovery" tape drive | |
1252 | * which temporarily pretends to be a CD-ROM drive. | |
1253 | * So we check that the device is really an OBDR tape | |
1254 | * device by checking for "$DR-10" in bytes 43-48 of | |
1255 | * the inquiry data. | |
1256 | */ | |
1257 | char obdr_sig[7]; | |
1258 | ||
1259 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1260 | obdr_sig[6] = '\0'; | |
1261 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1262 | /* Not OBDR device, ignore it. */ | |
1263 | break; | |
1264 | } | |
1265 | /* fall through . . . */ | |
1da177e4 LT |
1266 | case 0x01: /* sequential access, (tape) */ |
1267 | case 0x08: /* medium changer */ | |
1268 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1269 | printk(KERN_INFO "cciss%d: %s ignored, " | |
f70dba83 | 1270 | "too many devices.\n", h->ctlr, |
905bd78f | 1271 | scsi_device_type(this_device->devtype)); |
1da177e4 LT |
1272 | break; |
1273 | } | |
905bd78f | 1274 | currentsd[ncurrent] = *this_device; |
1da177e4 LT |
1275 | ncurrent++; |
1276 | break; | |
1277 | default: | |
1278 | break; | |
1279 | } | |
1280 | } | |
1281 | ||
f70dba83 | 1282 | adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent); |
1da177e4 LT |
1283 | out: |
1284 | kfree(inq_buff); | |
1285 | kfree(ld_buff); | |
905bd78f | 1286 | kfree(currentsd); |
1da177e4 LT |
1287 | return; |
1288 | } | |
1289 | ||
1290 | static int | |
1291 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1292 | { | |
1293 | int verb_len = strlen(verb); | |
1294 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1295 | return verb_len; | |
1296 | else | |
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | static int | |
f70dba83 | 1301 | cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length) |
1da177e4 LT |
1302 | { |
1303 | int arg_len; | |
1304 | ||
1305 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
f70dba83 | 1306 | cciss_update_non_disk_devices(h, hostno); |
1da177e4 LT |
1307 | else |
1308 | return -EINVAL; | |
1309 | return length; | |
1310 | } | |
1311 | ||
1312 | ||
1313 | static int | |
1314 | cciss_scsi_proc_info(struct Scsi_Host *sh, | |
1315 | char *buffer, /* data buffer */ | |
1316 | char **start, /* where data in buffer starts */ | |
1317 | off_t offset, /* offset from start of imaginary file */ | |
1318 | int length, /* length of data in buffer */ | |
1319 | int func) /* 0 == read, 1 == write */ | |
1320 | { | |
1321 | ||
1322 | int buflen, datalen; | |
f70dba83 | 1323 | ctlr_info_t *h; |
b9f0bd08 | 1324 | int i; |
1da177e4 | 1325 | |
f70dba83 SC |
1326 | h = (ctlr_info_t *) sh->hostdata[0]; |
1327 | if (h == NULL) /* This really shouldn't ever happen. */ | |
1da177e4 LT |
1328 | return -EINVAL; |
1329 | ||
1da177e4 | 1330 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ |
b9f0bd08 | 1331 | buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", |
f70dba83 | 1332 | h->ctlr, sh->host_no); |
b9f0bd08 MM |
1333 | |
1334 | /* this information is needed by apps to know which cciss | |
1335 | device corresponds to which scsi host number without | |
1336 | having to open a scsi target device node. The device | |
1337 | information is not a duplicate of /proc/scsi/scsi because | |
1338 | the two may be out of sync due to scsi hotplug, rather | |
1339 | this info is for an app to be able to use to know how to | |
1340 | get them back in sync. */ | |
1341 | ||
f70dba83 SC |
1342 | for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { |
1343 | struct cciss_scsi_dev_t *sd = | |
1344 | &ccissscsi[h->ctlr].dev[i]; | |
b9f0bd08 MM |
1345 | buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " |
1346 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1347 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1348 | sd->devtype, | |
1349 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1350 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1351 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1352 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1353 | } | |
1da177e4 LT |
1354 | datalen = buflen - offset; |
1355 | if (datalen < 0) { /* they're reading past EOF. */ | |
1356 | datalen = 0; | |
1357 | *start = buffer+buflen; | |
1358 | } else | |
1359 | *start = buffer + offset; | |
1360 | return(datalen); | |
1361 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ | |
f70dba83 | 1362 | return cciss_scsi_user_command(h, sh->host_no, |
1da177e4 LT |
1363 | buffer, length); |
1364 | } | |
1365 | ||
1366 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1367 | dma mapping and fills in the scatter gather entries of the | |
f70dba83 | 1368 | cciss command, c. */ |
1da177e4 | 1369 | |
f70dba83 | 1370 | static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c, |
87c3a922 | 1371 | struct scsi_cmnd *cmd) |
1da177e4 | 1372 | { |
41ce639a FT |
1373 | unsigned int len; |
1374 | struct scatterlist *sg; | |
1da177e4 | 1375 | __u64 addr64; |
87c3a922 SC |
1376 | int request_nsgs, i, chained, sg_index; |
1377 | struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr; | |
1378 | SGDescriptor_struct *curr_sg; | |
1379 | ||
1380 | BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); | |
1381 | ||
1382 | chained = 0; | |
1383 | sg_index = 0; | |
f70dba83 | 1384 | curr_sg = c->SG; |
87c3a922 SC |
1385 | request_nsgs = scsi_dma_map(cmd); |
1386 | if (request_nsgs) { | |
1387 | scsi_for_each_sg(cmd, sg, request_nsgs, i) { | |
1388 | if (sg_index + 1 == h->max_cmd_sgentries && | |
1389 | !chained && request_nsgs - i > 1) { | |
1390 | chained = 1; | |
1391 | sg_index = 0; | |
f70dba83 | 1392 | curr_sg = sa->cmd_sg_list[c->cmdindex]; |
87c3a922 | 1393 | } |
41ce639a FT |
1394 | addr64 = (__u64) sg_dma_address(sg); |
1395 | len = sg_dma_len(sg); | |
87c3a922 SC |
1396 | curr_sg[sg_index].Addr.lower = |
1397 | (__u32) (addr64 & 0x0FFFFFFFFULL); | |
1398 | curr_sg[sg_index].Addr.upper = | |
1399 | (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); | |
1400 | curr_sg[sg_index].Len = len; | |
1401 | curr_sg[sg_index].Ext = 0; | |
1402 | ++sg_index; | |
1da177e4 | 1403 | } |
87c3a922 | 1404 | if (chained) |
f70dba83 SC |
1405 | cciss_map_sg_chain_block(h, c, |
1406 | sa->cmd_sg_list[c->cmdindex], | |
87c3a922 SC |
1407 | (request_nsgs - (h->max_cmd_sgentries - 1)) * |
1408 | sizeof(SGDescriptor_struct)); | |
41ce639a | 1409 | } |
87c3a922 SC |
1410 | /* track how many SG entries we are using */ |
1411 | if (request_nsgs > h->maxSG) | |
1412 | h->maxSG = request_nsgs; | |
f70dba83 | 1413 | c->Header.SGTotal = (__u8) request_nsgs + chained; |
87c3a922 | 1414 | if (request_nsgs > h->max_cmd_sgentries) |
f70dba83 | 1415 | c->Header.SGList = h->max_cmd_sgentries; |
87c3a922 | 1416 | else |
f70dba83 | 1417 | c->Header.SGList = c->Header.SGTotal; |
1da177e4 LT |
1418 | return; |
1419 | } | |
1420 | ||
1421 | ||
1422 | static int | |
f281233d | 1423 | cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
1da177e4 | 1424 | { |
f70dba83 SC |
1425 | ctlr_info_t *h; |
1426 | int rc; | |
1da177e4 | 1427 | unsigned char scsi3addr[8]; |
f70dba83 | 1428 | CommandList_struct *c; |
1da177e4 LT |
1429 | unsigned long flags; |
1430 | ||
1431 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1432 | // We violate cmd->host privacy here. (Is there another way?) | |
f70dba83 | 1433 | h = (ctlr_info_t *) cmd->device->host->hostdata[0]; |
1da177e4 | 1434 | |
f70dba83 | 1435 | rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id, |
1da177e4 LT |
1436 | cmd->device->lun, scsi3addr); |
1437 | if (rc != 0) { | |
1438 | /* the scsi nexus does not match any that we presented... */ | |
1439 | /* pretend to mid layer that we got selection timeout */ | |
1440 | cmd->result = DID_NO_CONNECT << 16; | |
1441 | done(cmd); | |
1442 | /* we might want to think about registering controller itself | |
1443 | as a processor device on the bus so sg binds to it. */ | |
1444 | return 0; | |
1445 | } | |
1446 | ||
1da177e4 LT |
1447 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and |
1448 | see what the device thinks of it. */ | |
1449 | ||
f70dba83 SC |
1450 | spin_lock_irqsave(&h->lock, flags); |
1451 | c = scsi_cmd_alloc(h); | |
1452 | spin_unlock_irqrestore(&h->lock, flags); | |
1453 | if (c == NULL) { /* trouble... */ | |
b2a4a43d | 1454 | dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n"); |
1da177e4 LT |
1455 | /* FIXME: next 3 lines are -> BAD! <- */ |
1456 | cmd->result = DID_NO_CONNECT << 16; | |
1457 | done(cmd); | |
1458 | return 0; | |
1459 | } | |
1460 | ||
1461 | // Fill in the command list header | |
1462 | ||
1463 | cmd->scsi_done = done; // save this for use by completion code | |
1464 | ||
f70dba83 SC |
1465 | /* save c in case we have to abort it */ |
1466 | cmd->host_scribble = (unsigned char *) c; | |
1da177e4 | 1467 | |
f70dba83 SC |
1468 | c->cmd_type = CMD_SCSI; |
1469 | c->scsi_cmd = cmd; | |
1470 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
1471 | memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1472 | c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ | |
1da177e4 LT |
1473 | |
1474 | // Fill in the request block... | |
1475 | ||
f70dba83 SC |
1476 | c->Request.Timeout = 0; |
1477 | memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); | |
1478 | BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); | |
1479 | c->Request.CDBLen = cmd->cmd_len; | |
1480 | memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1481 | c->Request.Type.Type = TYPE_CMD; | |
1482 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
1da177e4 LT |
1483 | switch(cmd->sc_data_direction) |
1484 | { | |
f70dba83 SC |
1485 | case DMA_TO_DEVICE: |
1486 | c->Request.Type.Direction = XFER_WRITE; | |
1487 | break; | |
1488 | case DMA_FROM_DEVICE: | |
1489 | c->Request.Type.Direction = XFER_READ; | |
1490 | break; | |
1491 | case DMA_NONE: | |
1492 | c->Request.Type.Direction = XFER_NONE; | |
1493 | break; | |
1da177e4 LT |
1494 | case DMA_BIDIRECTIONAL: |
1495 | // This can happen if a buggy application does a scsi passthru | |
1496 | // and sets both inlen and outlen to non-zero. ( see | |
1497 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1498 | ||
f70dba83 | 1499 | c->Request.Type.Direction = XFER_RSVD; |
1da177e4 LT |
1500 | // This is technically wrong, and cciss controllers should |
1501 | // reject it with CMD_INVALID, which is the most correct | |
1502 | // response, but non-fibre backends appear to let it | |
1503 | // slide by, and give the same results as if this field | |
1504 | // were set correctly. Either way is acceptable for | |
1505 | // our purposes here. | |
1506 | ||
1507 | break; | |
1508 | ||
1509 | default: | |
b2a4a43d | 1510 | dev_warn(&h->pdev->dev, "unknown data direction: %d\n", |
1da177e4 LT |
1511 | cmd->sc_data_direction); |
1512 | BUG(); | |
1513 | break; | |
1514 | } | |
f70dba83 SC |
1515 | cciss_scatter_gather(h, c, cmd); |
1516 | enqueue_cmd_and_start_io(h, c); | |
1da177e4 LT |
1517 | /* the cmd'll come back via intr handler in complete_scsi_command() */ |
1518 | return 0; | |
1519 | } | |
1520 | ||
f281233d JG |
1521 | static DEF_SCSI_QCMD(cciss_scsi_queue_command) |
1522 | ||
f70dba83 | 1523 | static void cciss_unregister_scsi(ctlr_info_t *h) |
1da177e4 LT |
1524 | { |
1525 | struct cciss_scsi_adapter_data_t *sa; | |
1526 | struct cciss_scsi_cmd_stack_t *stk; | |
1527 | unsigned long flags; | |
1528 | ||
1529 | /* we are being forcibly unloaded, and may not refuse. */ | |
1530 | ||
f70dba83 SC |
1531 | spin_lock_irqsave(&h->lock, flags); |
1532 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1533 | stk = &sa->cmd_stack; |
1534 | ||
1535 | /* if we weren't ever actually registered, don't unregister */ | |
1536 | if (sa->registered) { | |
f70dba83 | 1537 | spin_unlock_irqrestore(&h->lock, flags); |
1da177e4 LT |
1538 | scsi_remove_host(sa->scsi_host); |
1539 | scsi_host_put(sa->scsi_host); | |
f70dba83 | 1540 | spin_lock_irqsave(&h->lock, flags); |
1da177e4 LT |
1541 | } |
1542 | ||
1543 | /* set scsi_host to NULL so our detect routine will | |
1544 | find us on register */ | |
1545 | sa->scsi_host = NULL; | |
f70dba83 SC |
1546 | spin_unlock_irqrestore(&h->lock, flags); |
1547 | scsi_cmd_stack_free(h); | |
1da177e4 | 1548 | kfree(sa); |
1da177e4 LT |
1549 | } |
1550 | ||
f70dba83 | 1551 | static int cciss_engage_scsi(ctlr_info_t *h) |
1da177e4 LT |
1552 | { |
1553 | struct cciss_scsi_adapter_data_t *sa; | |
1554 | struct cciss_scsi_cmd_stack_t *stk; | |
1555 | unsigned long flags; | |
1556 | ||
f70dba83 SC |
1557 | spin_lock_irqsave(&h->lock, flags); |
1558 | sa = h->scsi_ctlr; | |
1da177e4 LT |
1559 | stk = &sa->cmd_stack; |
1560 | ||
f4a93bcd | 1561 | if (sa->registered) { |
b2a4a43d | 1562 | dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n"); |
f70dba83 | 1563 | spin_unlock_irqrestore(&h->lock, flags); |
8721c81f | 1564 | return -ENXIO; |
1da177e4 | 1565 | } |
f4a93bcd | 1566 | sa->registered = 1; |
f70dba83 SC |
1567 | spin_unlock_irqrestore(&h->lock, flags); |
1568 | cciss_update_non_disk_devices(h, -1); | |
1569 | cciss_scsi_detect(h); | |
1da177e4 LT |
1570 | return 0; |
1571 | } | |
1572 | ||
1573 | static void | |
f70dba83 | 1574 | cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h) |
1da177e4 LT |
1575 | { |
1576 | unsigned long flags; | |
1da177e4 | 1577 | |
f70dba83 | 1578 | CPQ_TAPE_LOCK(h, flags); |
89b6e743 | 1579 | seq_printf(seq, |
b9f0bd08 | 1580 | "Sequential access devices: %d\n\n", |
f70dba83 SC |
1581 | ccissscsi[h->ctlr].ndevices); |
1582 | CPQ_TAPE_UNLOCK(h, flags); | |
1da177e4 LT |
1583 | } |
1584 | ||
88f627ae SC |
1585 | static int wait_for_device_to_become_ready(ctlr_info_t *h, |
1586 | unsigned char lunaddr[]) | |
1587 | { | |
1588 | int rc; | |
1589 | int count = 0; | |
1590 | int waittime = HZ; | |
1591 | CommandList_struct *c; | |
1592 | ||
6b4d96b8 | 1593 | c = cmd_alloc(h); |
88f627ae | 1594 | if (!c) { |
b2a4a43d SC |
1595 | dev_warn(&h->pdev->dev, "out of memory in " |
1596 | "wait_for_device_to_become_ready.\n"); | |
88f627ae SC |
1597 | return IO_ERROR; |
1598 | } | |
1599 | ||
1600 | /* Send test unit ready until device ready, or give up. */ | |
1601 | while (count < 20) { | |
1602 | ||
1603 | /* Wait for a bit. do this first, because if we send | |
1604 | * the TUR right away, the reset will just abort it. | |
1605 | */ | |
40df6ae4 | 1606 | schedule_timeout_uninterruptible(waittime); |
88f627ae SC |
1607 | count++; |
1608 | ||
1609 | /* Increase wait time with each try, up to a point. */ | |
1610 | if (waittime < (HZ * 30)) | |
1611 | waittime = waittime * 2; | |
1612 | ||
1613 | /* Send the Test Unit Ready */ | |
f70dba83 | 1614 | rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0, |
88f627ae | 1615 | lunaddr, TYPE_CMD); |
85cc61ae | 1616 | if (rc == 0) |
1617 | rc = sendcmd_withirq_core(h, c, 0); | |
1618 | ||
1619 | (void) process_sendcmd_error(h, c); | |
88f627ae | 1620 | |
3969251b | 1621 | if (rc != 0) |
1622 | goto retry_tur; | |
88f627ae | 1623 | |
3969251b | 1624 | if (c->err_info->CommandStatus == CMD_SUCCESS) |
88f627ae SC |
1625 | break; |
1626 | ||
3969251b | 1627 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && |
1628 | c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { | |
1629 | if (c->err_info->SenseInfo[2] == NO_SENSE) | |
1630 | break; | |
1631 | if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { | |
1632 | unsigned char asc; | |
1633 | asc = c->err_info->SenseInfo[12]; | |
1634 | check_for_unit_attention(h, c); | |
1635 | if (asc == POWER_OR_RESET) | |
1636 | break; | |
1637 | } | |
1638 | } | |
1639 | retry_tur: | |
b2a4a43d | 1640 | dev_warn(&h->pdev->dev, "Waiting %d secs " |
88f627ae | 1641 | "for device to become ready.\n", |
b2a4a43d | 1642 | waittime / HZ); |
88f627ae SC |
1643 | rc = 1; /* device not ready. */ |
1644 | } | |
1645 | ||
1646 | if (rc) | |
b2a4a43d | 1647 | dev_warn(&h->pdev->dev, "giving up on device.\n"); |
88f627ae | 1648 | else |
b2a4a43d | 1649 | dev_warn(&h->pdev->dev, "device is ready.\n"); |
88f627ae | 1650 | |
6b4d96b8 | 1651 | cmd_free(h, c); |
88f627ae SC |
1652 | return rc; |
1653 | } | |
89b6e743 | 1654 | |
3da8b713 | 1655 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
1656 | * complaining. Doing a host- or bus-reset can't do anything good here. | |
1657 | * Despite what it might say in scsi_error.c, there may well be commands | |
1658 | * on the controller, as the cciss driver registers twice, once as a block | |
1659 | * device for the logical drives, and once as a scsi device, for any tape | |
1660 | * drives. So we know there are no commands out on the tape drives, but we | |
1661 | * don't know there are no commands on the controller, and it is likely | |
1662 | * that there probably are, as the cciss block device is most commonly used | |
1663 | * as a boot device (embedded controller on HP/Compaq systems.) | |
1664 | */ | |
1665 | ||
1666 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) | |
1667 | { | |
1668 | int rc; | |
1669 | CommandList_struct *cmd_in_trouble; | |
88f627ae | 1670 | unsigned char lunaddr[8]; |
f70dba83 | 1671 | ctlr_info_t *h; |
3da8b713 | 1672 | |
1673 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1674 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1675 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1676 | return FAILED; |
b2a4a43d | 1677 | dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n"); |
3da8b713 | 1678 | /* find the command that's giving us trouble */ |
1679 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; | |
88f627ae | 1680 | if (cmd_in_trouble == NULL) /* paranoia */ |
3da8b713 | 1681 | return FAILED; |
88f627ae | 1682 | memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); |
3da8b713 | 1683 | /* send a reset to the SCSI LUN which the command was sent to */ |
f70dba83 | 1684 | rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr, |
3da8b713 | 1685 | TYPE_MSG); |
f70dba83 | 1686 | if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0) |
3da8b713 | 1687 | return SUCCESS; |
b2a4a43d | 1688 | dev_warn(&h->pdev->dev, "resetting device failed.\n"); |
3da8b713 | 1689 | return FAILED; |
1690 | } | |
1691 | ||
1692 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) | |
1693 | { | |
1694 | int rc; | |
1695 | CommandList_struct *cmd_to_abort; | |
85cc61ae | 1696 | unsigned char lunaddr[8]; |
f70dba83 | 1697 | ctlr_info_t *h; |
3da8b713 | 1698 | |
1699 | /* find the controller to which the command to be aborted was sent */ | |
f70dba83 SC |
1700 | h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; |
1701 | if (h == NULL) /* paranoia */ | |
3da8b713 | 1702 | return FAILED; |
b2a4a43d | 1703 | dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n"); |
3da8b713 | 1704 | |
1705 | /* find the command to be aborted */ | |
1706 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; | |
1707 | if (cmd_to_abort == NULL) /* paranoia */ | |
1708 | return FAILED; | |
85cc61ae | 1709 | memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); |
f70dba83 | 1710 | rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag, |
85cc61ae | 1711 | 0, 0, lunaddr, TYPE_MSG); |
3da8b713 | 1712 | if (rc == 0) |
1713 | return SUCCESS; | |
1714 | return FAILED; | |
1715 | ||
1716 | } | |
1717 | ||
1da177e4 LT |
1718 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
1719 | ||
1720 | /* If no tape support, then these become defined out of existence */ | |
1721 | ||
1722 | #define cciss_scsi_setup(cntl_num) | |
1da177e4 LT |
1723 | |
1724 | #endif /* CONFIG_CISS_SCSI_TAPE */ |