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1 | /* | |
2 | * Disk Array driver for Compaq SA53xx Controllers, SCSI Tape module | |
3 | * Copyright 2001 Compaq Computer Corporation | |
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 | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
13 | * NON INFRINGEMENT. See the GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
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 | ||
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 | ||
38 | #include <scsi/scsi.h> | |
39 | #include <scsi/scsi_cmnd.h> | |
40 | #include <scsi/scsi_device.h> | |
41 | #include <scsi/scsi_host.h> | |
42 | ||
43 | #include "cciss_scsi.h" | |
44 | ||
45 | /* some prototypes... */ | |
46 | static int sendcmd( | |
47 | __u8 cmd, | |
48 | int ctlr, | |
49 | void *buff, | |
50 | size_t size, | |
51 | unsigned int use_unit_num, /* 0: address the controller, | |
52 | 1: address logical volume log_unit, | |
53 | 2: address is in scsi3addr */ | |
54 | unsigned int log_unit, | |
55 | __u8 page_code, | |
56 | unsigned char *scsi3addr, | |
57 | int cmd_type); | |
58 | ||
59 | ||
60 | static int cciss_scsi_proc_info( | |
61 | struct Scsi_Host *sh, | |
62 | char *buffer, /* data buffer */ | |
63 | char **start, /* where data in buffer starts */ | |
64 | off_t offset, /* offset from start of imaginary file */ | |
65 | int length, /* length of data in buffer */ | |
66 | int func); /* 0 == read, 1 == write */ | |
67 | ||
68 | static int cciss_scsi_queue_command (struct scsi_cmnd *cmd, | |
69 | void (* done)(struct scsi_cmnd *)); | |
70 | ||
71 | static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { | |
72 | { .name = "cciss0", .ndevices = 0 }, | |
73 | { .name = "cciss1", .ndevices = 0 }, | |
74 | { .name = "cciss2", .ndevices = 0 }, | |
75 | { .name = "cciss3", .ndevices = 0 }, | |
76 | { .name = "cciss4", .ndevices = 0 }, | |
77 | { .name = "cciss5", .ndevices = 0 }, | |
78 | { .name = "cciss6", .ndevices = 0 }, | |
79 | { .name = "cciss7", .ndevices = 0 }, | |
80 | }; | |
81 | ||
82 | static struct scsi_host_template cciss_driver_template = { | |
83 | .module = THIS_MODULE, | |
84 | .name = "cciss", | |
85 | .proc_name = "cciss", | |
86 | .proc_info = cciss_scsi_proc_info, | |
87 | .queuecommand = cciss_scsi_queue_command, | |
88 | .can_queue = SCSI_CCISS_CAN_QUEUE, | |
89 | .this_id = 7, | |
90 | .sg_tablesize = MAXSGENTRIES, | |
91 | .cmd_per_lun = 1, | |
92 | .use_clustering = DISABLE_CLUSTERING, | |
93 | }; | |
94 | ||
95 | #pragma pack(1) | |
96 | struct cciss_scsi_cmd_stack_elem_t { | |
97 | CommandList_struct cmd; | |
98 | ErrorInfo_struct Err; | |
99 | __u32 busaddr; | |
100 | __u32 pad; | |
101 | }; | |
102 | ||
103 | #pragma pack() | |
104 | ||
105 | #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \ | |
106 | CCISS_MAX_SCSI_DEVS_PER_HBA + 2) | |
107 | // plus two for init time usage | |
108 | ||
109 | #pragma pack(1) | |
110 | struct cciss_scsi_cmd_stack_t { | |
111 | struct cciss_scsi_cmd_stack_elem_t *pool; | |
112 | struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE]; | |
113 | dma_addr_t cmd_pool_handle; | |
114 | int top; | |
115 | }; | |
116 | #pragma pack() | |
117 | ||
118 | struct cciss_scsi_adapter_data_t { | |
119 | struct Scsi_Host *scsi_host; | |
120 | struct cciss_scsi_cmd_stack_t cmd_stack; | |
121 | int registered; | |
122 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
123 | }; | |
124 | ||
125 | #define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \ | |
126 | &(((struct cciss_scsi_adapter_data_t *) \ | |
127 | hba[ctlr]->scsi_ctlr)->lock), flags); | |
128 | #define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \ | |
129 | &(((struct cciss_scsi_adapter_data_t *) \ | |
130 | hba[ctlr]->scsi_ctlr)->lock), flags); | |
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. */ | |
136 | /* use CCISS_LOCK(ctlr) */ | |
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 | ||
146 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; | |
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; | |
157 | /* (__u32) (stk->cmd_pool_handle + | |
158 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ | |
159 | ||
160 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); | |
161 | /* (__u64) (stk->cmd_pool_handle + | |
162 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + | |
163 | sizeof(CommandList_struct)); */ | |
164 | stk->top--; | |
165 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; | |
166 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; | |
167 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); | |
168 | ||
169 | c->cmd.ctlr = h->ctlr; | |
170 | c->cmd.err_info = &c->Err; | |
171 | ||
172 | return (CommandList_struct *) c; | |
173 | } | |
174 | ||
175 | static void | |
176 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd) | |
177 | { | |
178 | /* assume only one process in here at a time, locking done by caller. */ | |
179 | /* use CCISS_LOCK(ctlr) */ | |
180 | /* drop the free memory chunk on top of the stack. */ | |
181 | ||
182 | struct cciss_scsi_adapter_data_t *sa; | |
183 | struct cciss_scsi_cmd_stack_t *stk; | |
184 | ||
185 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; | |
186 | stk = &sa->cmd_stack; | |
187 | if (stk->top >= CMD_STACK_SIZE) { | |
188 | printk("cciss: scsi_cmd_free called too many times.\n"); | |
189 | BUG(); | |
190 | } | |
191 | stk->top++; | |
192 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd; | |
193 | } | |
194 | ||
195 | static int | |
196 | scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa) | |
197 | { | |
198 | int i; | |
199 | struct cciss_scsi_cmd_stack_t *stk; | |
200 | size_t size; | |
201 | ||
202 | stk = &sa->cmd_stack; | |
203 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
204 | ||
205 | // pci_alloc_consistent guarantees 32-bit DMA address will | |
206 | // be used | |
207 | ||
208 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) | |
209 | pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle); | |
210 | ||
211 | if (stk->pool == NULL) { | |
212 | printk("stk->pool is null\n"); | |
213 | return -1; | |
214 | } | |
215 | ||
216 | for (i=0; i<CMD_STACK_SIZE; i++) { | |
217 | stk->elem[i] = &stk->pool[i]; | |
218 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
219 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
220 | } | |
221 | stk->top = CMD_STACK_SIZE-1; | |
222 | return 0; | |
223 | } | |
224 | ||
225 | static void | |
226 | scsi_cmd_stack_free(int ctlr) | |
227 | { | |
228 | struct cciss_scsi_adapter_data_t *sa; | |
229 | struct cciss_scsi_cmd_stack_t *stk; | |
230 | size_t size; | |
231 | ||
232 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
233 | stk = &sa->cmd_stack; | |
234 | if (stk->top != CMD_STACK_SIZE-1) { | |
235 | printk( "cciss: %d scsi commands are still outstanding.\n", | |
236 | CMD_STACK_SIZE - stk->top); | |
237 | // BUG(); | |
238 | printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk); | |
239 | } | |
240 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
241 | ||
242 | pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle); | |
243 | stk->pool = NULL; | |
244 | } | |
245 | ||
246 | /* scsi_device_types comes from scsi.h */ | |
247 | #define DEVICETYPE(n) (n<0 || n>MAX_SCSI_DEVICE_CODE) ? \ | |
248 | "Unknown" : scsi_device_types[n] | |
249 | ||
250 | #if 0 | |
251 | static int xmargin=8; | |
252 | static int amargin=60; | |
253 | ||
254 | static void | |
255 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
256 | { | |
257 | ||
258 | int i; | |
259 | unsigned char *x; | |
260 | ||
261 | if (hex) | |
262 | { | |
263 | x = c; | |
264 | for (i=0;i<len;i++) | |
265 | { | |
266 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
267 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
268 | printk(" %02x", *x); | |
269 | x++; | |
270 | } | |
271 | printk("\n"); | |
272 | } | |
273 | if (ascii) | |
274 | { | |
275 | x = c; | |
276 | for (i=0;i<len;i++) | |
277 | { | |
278 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
279 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
280 | if (*x > 26 && *x < 128) printk("%c", *x); | |
281 | else printk("."); | |
282 | x++; | |
283 | } | |
284 | printk("\n"); | |
285 | } | |
286 | } | |
287 | ||
288 | static void | |
289 | print_cmd(CommandList_struct *cp) | |
290 | { | |
291 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
292 | printk("sglist:%d\n", cp->Header.SGList); | |
293 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
294 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
295 | cp->Header.Tag.lower); | |
296 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
297 | cp->Header.LUN.LunAddrBytes[0], | |
298 | cp->Header.LUN.LunAddrBytes[1], | |
299 | cp->Header.LUN.LunAddrBytes[2], | |
300 | cp->Header.LUN.LunAddrBytes[3], | |
301 | cp->Header.LUN.LunAddrBytes[4], | |
302 | cp->Header.LUN.LunAddrBytes[5], | |
303 | cp->Header.LUN.LunAddrBytes[6], | |
304 | cp->Header.LUN.LunAddrBytes[7]); | |
305 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
306 | printk("Type:%d\n",cp->Request.Type.Type); | |
307 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
308 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
309 | printk("Timeout:%d\n",cp->Request.Timeout); | |
310 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
311 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
312 | cp->Request.CDB[0], cp->Request.CDB[1], | |
313 | cp->Request.CDB[2], cp->Request.CDB[3], | |
314 | cp->Request.CDB[4], cp->Request.CDB[5], | |
315 | cp->Request.CDB[6], cp->Request.CDB[7], | |
316 | cp->Request.CDB[8], cp->Request.CDB[9], | |
317 | cp->Request.CDB[10], cp->Request.CDB[11], | |
318 | cp->Request.CDB[12], cp->Request.CDB[13], | |
319 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
320 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
321 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
322 | cp->ErrDesc.Len); | |
323 | printk("sgs..........Errorinfo:\n"); | |
324 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
325 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
326 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
327 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
328 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
329 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
330 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
331 | ||
332 | } | |
333 | ||
334 | #endif | |
335 | ||
336 | static int | |
337 | find_bus_target_lun(int ctlr, int *bus, int *target, int *lun) | |
338 | { | |
339 | /* finds an unused bus, target, lun for a new device */ | |
340 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
341 | int i, found=0; | |
342 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
343 | ||
344 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
345 | ||
346 | target_taken[SELF_SCSI_ID] = 1; | |
347 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) | |
348 | target_taken[ccissscsi[ctlr].dev[i].target] = 1; | |
349 | ||
350 | for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) { | |
351 | if (!target_taken[i]) { | |
352 | *bus = 0; *target=i; *lun = 0; found=1; | |
353 | break; | |
354 | } | |
355 | } | |
356 | return (!found); | |
357 | } | |
358 | ||
359 | static int | |
360 | cciss_scsi_add_entry(int ctlr, int hostno, | |
361 | unsigned char *scsi3addr, int devtype) | |
362 | { | |
363 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
364 | int n = ccissscsi[ctlr].ndevices; | |
365 | struct cciss_scsi_dev_t *sd; | |
366 | ||
367 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
368 | printk("cciss%d: Too many devices, " | |
369 | "some will be inaccessible.\n", ctlr); | |
370 | return -1; | |
371 | } | |
372 | sd = &ccissscsi[ctlr].dev[n]; | |
373 | if (find_bus_target_lun(ctlr, &sd->bus, &sd->target, &sd->lun) != 0) | |
374 | return -1; | |
375 | memcpy(&sd->scsi3addr[0], scsi3addr, 8); | |
376 | sd->devtype = devtype; | |
377 | ccissscsi[ctlr].ndevices++; | |
378 | ||
379 | /* initially, (before registering with scsi layer) we don't | |
380 | know our hostno and we don't want to print anything first | |
381 | time anyway (the scsi layer's inquiries will show that info) */ | |
382 | if (hostno != -1) | |
383 | printk("cciss%d: %s device c%db%dt%dl%d added.\n", | |
384 | ctlr, DEVICETYPE(sd->devtype), hostno, | |
385 | sd->bus, sd->target, sd->lun); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | static void | |
390 | cciss_scsi_remove_entry(int ctlr, int hostno, int entry) | |
391 | { | |
392 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
393 | int i; | |
394 | struct cciss_scsi_dev_t sd; | |
395 | ||
396 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
397 | sd = ccissscsi[ctlr].dev[entry]; | |
398 | for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++) | |
399 | ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1]; | |
400 | ccissscsi[ctlr].ndevices--; | |
401 | printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
402 | ctlr, DEVICETYPE(sd.devtype), hostno, | |
403 | sd.bus, sd.target, sd.lun); | |
404 | } | |
405 | ||
406 | ||
407 | #define SCSI3ADDR_EQ(a,b) ( \ | |
408 | (a)[7] == (b)[7] && \ | |
409 | (a)[6] == (b)[6] && \ | |
410 | (a)[5] == (b)[5] && \ | |
411 | (a)[4] == (b)[4] && \ | |
412 | (a)[3] == (b)[3] && \ | |
413 | (a)[2] == (b)[2] && \ | |
414 | (a)[1] == (b)[1] && \ | |
415 | (a)[0] == (b)[0]) | |
416 | ||
417 | static int | |
418 | adjust_cciss_scsi_table(int ctlr, int hostno, | |
419 | struct cciss_scsi_dev_t sd[], int nsds) | |
420 | { | |
421 | /* sd contains scsi3 addresses and devtypes, but | |
422 | bus target and lun are not filled in. This funciton | |
423 | takes what's in sd to be the current and adjusts | |
424 | ccissscsi[] to be in line with what's in sd. */ | |
425 | ||
426 | int i,j, found, changes=0; | |
427 | struct cciss_scsi_dev_t *csd; | |
428 | unsigned long flags; | |
429 | ||
430 | CPQ_TAPE_LOCK(ctlr, flags); | |
431 | ||
432 | /* find any devices in ccissscsi[] that are not in | |
433 | sd[] and remove them from ccissscsi[] */ | |
434 | ||
435 | i = 0; | |
436 | while(i<ccissscsi[ctlr].ndevices) { | |
437 | csd = &ccissscsi[ctlr].dev[i]; | |
438 | found=0; | |
439 | for (j=0;j<nsds;j++) { | |
440 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
441 | csd->scsi3addr)) { | |
442 | if (sd[j].devtype == csd->devtype) | |
443 | found=2; | |
444 | else | |
445 | found=1; | |
446 | break; | |
447 | } | |
448 | } | |
449 | ||
450 | if (found == 0) { /* device no longer present. */ | |
451 | changes++; | |
452 | /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
453 | ctlr, DEVICETYPE(csd->devtype), hostno, | |
454 | csd->bus, csd->target, csd->lun); */ | |
455 | cciss_scsi_remove_entry(ctlr, hostno, i); | |
456 | /* note, i not incremented */ | |
457 | } | |
458 | else if (found == 1) { /* device is different kind */ | |
459 | changes++; | |
460 | printk("cciss%d: device c%db%dt%dl%d type changed " | |
461 | "(device type now %s).\n", | |
462 | ctlr, hostno, csd->bus, csd->target, csd->lun, | |
463 | DEVICETYPE(csd->devtype)); | |
464 | csd->devtype = sd[j].devtype; | |
465 | i++; /* so just move along. */ | |
466 | } else /* device is same as it ever was, */ | |
467 | i++; /* so just move along. */ | |
468 | } | |
469 | ||
470 | /* Now, make sure every device listed in sd[] is also | |
471 | listed in ccissscsi[], adding them if they aren't found */ | |
472 | ||
473 | for (i=0;i<nsds;i++) { | |
474 | found=0; | |
475 | for (j=0;j<ccissscsi[ctlr].ndevices;j++) { | |
476 | csd = &ccissscsi[ctlr].dev[j]; | |
477 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, | |
478 | csd->scsi3addr)) { | |
479 | if (sd[i].devtype == csd->devtype) | |
480 | found=2; /* found device */ | |
481 | else | |
482 | found=1; /* found a bug. */ | |
483 | break; | |
484 | } | |
485 | } | |
486 | if (!found) { | |
487 | changes++; | |
488 | if (cciss_scsi_add_entry(ctlr, hostno, | |
489 | &sd[i].scsi3addr[0], sd[i].devtype) != 0) | |
490 | break; | |
491 | } else if (found == 1) { | |
492 | /* should never happen... */ | |
493 | changes++; | |
494 | printk("cciss%d: device unexpectedly changed type\n", | |
495 | ctlr); | |
496 | /* but if it does happen, we just ignore that device */ | |
497 | } | |
498 | } | |
499 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
500 | ||
501 | if (!changes) | |
502 | printk("cciss%d: No device changes detected.\n", ctlr); | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
507 | static int | |
508 | lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr) | |
509 | { | |
510 | int i; | |
511 | struct cciss_scsi_dev_t *sd; | |
512 | unsigned long flags; | |
513 | ||
514 | CPQ_TAPE_LOCK(ctlr, flags); | |
515 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) { | |
516 | sd = &ccissscsi[ctlr].dev[i]; | |
517 | if (sd->bus == bus && | |
518 | sd->target == target && | |
519 | sd->lun == lun) { | |
520 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
521 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
522 | return 0; | |
523 | } | |
524 | } | |
525 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
526 | return -1; | |
527 | } | |
528 | ||
529 | static void | |
530 | cciss_scsi_setup(int cntl_num) | |
531 | { | |
532 | struct cciss_scsi_adapter_data_t * shba; | |
533 | ||
534 | ccissscsi[cntl_num].ndevices = 0; | |
535 | shba = (struct cciss_scsi_adapter_data_t *) | |
536 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
537 | if (shba == NULL) | |
538 | return; | |
539 | shba->scsi_host = NULL; | |
540 | spin_lock_init(&shba->lock); | |
541 | shba->registered = 0; | |
542 | if (scsi_cmd_stack_setup(cntl_num, shba) != 0) { | |
543 | kfree(shba); | |
544 | shba = NULL; | |
545 | } | |
546 | hba[cntl_num]->scsi_ctlr = (void *) shba; | |
547 | return; | |
548 | } | |
549 | ||
550 | static void | |
551 | complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag) | |
552 | { | |
553 | struct scsi_cmnd *cmd; | |
554 | ctlr_info_t *ctlr; | |
555 | u64bit addr64; | |
556 | ErrorInfo_struct *ei; | |
557 | ||
558 | ei = cp->err_info; | |
559 | ||
560 | /* First, see if it was a message rather than a command */ | |
561 | if (cp->Request.Type.Type == TYPE_MSG) { | |
562 | cp->cmd_type = CMD_MSG_DONE; | |
563 | return; | |
564 | } | |
565 | ||
566 | cmd = (struct scsi_cmnd *) cp->scsi_cmd; | |
567 | ctlr = hba[cp->ctlr]; | |
568 | ||
569 | /* undo the DMA mappings */ | |
570 | ||
571 | if (cmd->use_sg) { | |
572 | pci_unmap_sg(ctlr->pdev, | |
573 | cmd->buffer, cmd->use_sg, | |
574 | cmd->sc_data_direction); | |
575 | } | |
576 | else if (cmd->request_bufflen) { | |
577 | addr64.val32.lower = cp->SG[0].Addr.lower; | |
578 | addr64.val32.upper = cp->SG[0].Addr.upper; | |
579 | pci_unmap_single(ctlr->pdev, (dma_addr_t) addr64.val, | |
580 | cmd->request_bufflen, | |
581 | cmd->sc_data_direction); | |
582 | } | |
583 | ||
584 | cmd->result = (DID_OK << 16); /* host byte */ | |
585 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
586 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
587 | ||
588 | cmd->result |= (ei->ScsiStatus); | |
589 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
590 | ||
591 | /* copy the sense data whether we need to or not. */ | |
592 | ||
593 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
594 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
595 | SCSI_SENSE_BUFFERSIZE : | |
596 | ei->SenseLen); | |
597 | cmd->resid = ei->ResidualCnt; | |
598 | ||
599 | if(ei->CommandStatus != 0) | |
600 | { /* an error has occurred */ | |
601 | switch(ei->CommandStatus) | |
602 | { | |
603 | case CMD_TARGET_STATUS: | |
604 | /* Pass it up to the upper layers... */ | |
605 | if( ei->ScsiStatus) | |
606 | { | |
607 | #if 0 | |
608 | printk(KERN_WARNING "cciss: cmd %p " | |
609 | "has SCSI Status = %x\n", | |
610 | cp, | |
611 | ei->ScsiStatus); | |
612 | #endif | |
613 | cmd->result |= (ei->ScsiStatus < 1); | |
614 | } | |
615 | else { /* scsi status is zero??? How??? */ | |
616 | ||
617 | /* Ordinarily, this case should never happen, but there is a bug | |
618 | in some released firmware revisions that allows it to happen | |
619 | if, for example, a 4100 backplane loses power and the tape | |
620 | drive is in it. We assume that it's a fatal error of some | |
621 | kind because we can't show that it wasn't. We will make it | |
622 | look like selection timeout since that is the most common | |
623 | reason for this to occur, and it's severe enough. */ | |
624 | ||
625 | cmd->result = DID_NO_CONNECT << 16; | |
626 | } | |
627 | break; | |
628 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
629 | break; | |
630 | case CMD_DATA_OVERRUN: | |
631 | printk(KERN_WARNING "cciss: cp %p has" | |
632 | " completed with data overrun " | |
633 | "reported\n", cp); | |
634 | break; | |
635 | case CMD_INVALID: { | |
636 | /* print_bytes(cp, sizeof(*cp), 1, 0); | |
637 | print_cmd(cp); */ | |
638 | /* We get CMD_INVALID if you address a non-existent tape drive instead | |
639 | of a selection timeout (no response). You will see this if you yank | |
640 | out a tape drive, then try to access it. This is kind of a shame | |
641 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
642 | get interpreted as a missing target. */ | |
643 | cmd->result = DID_NO_CONNECT << 16; | |
644 | } | |
645 | break; | |
646 | case CMD_PROTOCOL_ERR: | |
647 | printk(KERN_WARNING "cciss: cp %p has " | |
648 | "protocol error \n", cp); | |
649 | break; | |
650 | case CMD_HARDWARE_ERR: | |
651 | cmd->result = DID_ERROR << 16; | |
652 | printk(KERN_WARNING "cciss: cp %p had " | |
653 | " hardware error\n", cp); | |
654 | break; | |
655 | case CMD_CONNECTION_LOST: | |
656 | cmd->result = DID_ERROR << 16; | |
657 | printk(KERN_WARNING "cciss: cp %p had " | |
658 | "connection lost\n", cp); | |
659 | break; | |
660 | case CMD_ABORTED: | |
661 | cmd->result = DID_ABORT << 16; | |
662 | printk(KERN_WARNING "cciss: cp %p was " | |
663 | "aborted\n", cp); | |
664 | break; | |
665 | case CMD_ABORT_FAILED: | |
666 | cmd->result = DID_ERROR << 16; | |
667 | printk(KERN_WARNING "cciss: cp %p reports " | |
668 | "abort failed\n", cp); | |
669 | break; | |
670 | case CMD_UNSOLICITED_ABORT: | |
671 | cmd->result = DID_ABORT << 16; | |
672 | printk(KERN_WARNING "cciss: cp %p aborted " | |
673 | "do to an unsolicited abort\n", cp); | |
674 | break; | |
675 | case CMD_TIMEOUT: | |
676 | cmd->result = DID_TIME_OUT << 16; | |
677 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
678 | cp); | |
679 | break; | |
680 | default: | |
681 | cmd->result = DID_ERROR << 16; | |
682 | printk(KERN_WARNING "cciss: cp %p returned " | |
683 | "unknown status %x\n", cp, | |
684 | ei->CommandStatus); | |
685 | } | |
686 | } | |
687 | // printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel, | |
688 | // cmd->target, cmd->lun); | |
689 | cmd->scsi_done(cmd); | |
690 | scsi_cmd_free(ctlr, cp); | |
691 | } | |
692 | ||
693 | static int | |
694 | cciss_scsi_detect(int ctlr) | |
695 | { | |
696 | struct Scsi_Host *sh; | |
697 | int error; | |
698 | ||
699 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
700 | if (sh == NULL) | |
701 | goto fail; | |
702 | sh->io_port = 0; // good enough? FIXME, | |
703 | sh->n_io_port = 0; // I don't think we use these two... | |
704 | sh->this_id = SELF_SCSI_ID; | |
705 | ||
706 | ((struct cciss_scsi_adapter_data_t *) | |
707 | hba[ctlr]->scsi_ctlr)->scsi_host = (void *) sh; | |
708 | sh->hostdata[0] = (unsigned long) hba[ctlr]; | |
709 | sh->irq = hba[ctlr]->intr; | |
710 | sh->unique_id = sh->irq; | |
711 | error = scsi_add_host(sh, &hba[ctlr]->pdev->dev); | |
712 | if (error) | |
713 | goto fail_host_put; | |
714 | scsi_scan_host(sh); | |
715 | return 1; | |
716 | ||
717 | fail_host_put: | |
718 | scsi_host_put(sh); | |
719 | fail: | |
720 | return 0; | |
721 | } | |
722 | ||
723 | static void | |
724 | cciss_unmap_one(struct pci_dev *pdev, | |
725 | CommandList_struct *cp, | |
726 | size_t buflen, | |
727 | int data_direction) | |
728 | { | |
729 | u64bit addr64; | |
730 | ||
731 | addr64.val32.lower = cp->SG[0].Addr.lower; | |
732 | addr64.val32.upper = cp->SG[0].Addr.upper; | |
733 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); | |
734 | } | |
735 | ||
736 | static void | |
737 | cciss_map_one(struct pci_dev *pdev, | |
738 | CommandList_struct *cp, | |
739 | unsigned char *buf, | |
740 | size_t buflen, | |
741 | int data_direction) | |
742 | { | |
743 | __u64 addr64; | |
744 | ||
745 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
746 | cp->SG[0].Addr.lower = | |
747 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
748 | cp->SG[0].Addr.upper = | |
749 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
750 | cp->SG[0].Len = buflen; | |
751 | cp->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
752 | cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
753 | } | |
754 | ||
755 | static int | |
756 | cciss_scsi_do_simple_cmd(ctlr_info_t *c, | |
757 | CommandList_struct *cp, | |
758 | unsigned char *scsi3addr, | |
759 | unsigned char *cdb, | |
760 | unsigned char cdblen, | |
761 | unsigned char *buf, int bufsize, | |
762 | int direction) | |
763 | { | |
764 | unsigned long flags; | |
765 | DECLARE_COMPLETION(wait); | |
766 | ||
767 | cp->cmd_type = CMD_IOCTL_PEND; // treat this like an ioctl | |
768 | cp->scsi_cmd = NULL; | |
769 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
770 | memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN)); | |
771 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
772 | // Fill in the request block... | |
773 | ||
774 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
775 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
776 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
777 | ||
778 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
779 | memcpy(cp->Request.CDB, cdb, cdblen); | |
780 | cp->Request.Timeout = 0; | |
781 | cp->Request.CDBLen = cdblen; | |
782 | cp->Request.Type.Type = TYPE_CMD; | |
783 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
784 | cp->Request.Type.Direction = direction; | |
785 | ||
786 | /* Fill in the SG list and do dma mapping */ | |
787 | cciss_map_one(c->pdev, cp, (unsigned char *) buf, | |
788 | bufsize, DMA_FROM_DEVICE); | |
789 | ||
790 | cp->waiting = &wait; | |
791 | ||
792 | /* Put the request on the tail of the request queue */ | |
793 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
794 | addQ(&c->reqQ, cp); | |
795 | c->Qdepth++; | |
796 | start_io(c); | |
797 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
798 | ||
799 | wait_for_completion(&wait); | |
800 | ||
801 | /* undo the dma mapping */ | |
802 | cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE); | |
803 | return(0); | |
804 | } | |
805 | ||
806 | static void | |
807 | cciss_scsi_interpret_error(CommandList_struct *cp) | |
808 | { | |
809 | ErrorInfo_struct *ei; | |
810 | ||
811 | ei = cp->err_info; | |
812 | switch(ei->CommandStatus) | |
813 | { | |
814 | case CMD_TARGET_STATUS: | |
815 | printk(KERN_WARNING "cciss: cmd %p has " | |
816 | "completed with errors\n", cp); | |
817 | printk(KERN_WARNING "cciss: cmd %p " | |
818 | "has SCSI Status = %x\n", | |
819 | cp, | |
820 | ei->ScsiStatus); | |
821 | if (ei->ScsiStatus == 0) | |
822 | printk(KERN_WARNING | |
823 | "cciss:SCSI status is abnormally zero. " | |
824 | "(probably indicates selection timeout " | |
825 | "reported incorrectly due to a known " | |
826 | "firmware bug, circa July, 2001.)\n"); | |
827 | break; | |
828 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
829 | printk("UNDERRUN\n"); | |
830 | break; | |
831 | case CMD_DATA_OVERRUN: | |
832 | printk(KERN_WARNING "cciss: cp %p has" | |
833 | " completed with data overrun " | |
834 | "reported\n", cp); | |
835 | break; | |
836 | case CMD_INVALID: { | |
837 | /* controller unfortunately reports SCSI passthru's */ | |
838 | /* to non-existent targets as invalid commands. */ | |
839 | printk(KERN_WARNING "cciss: cp %p is " | |
840 | "reported invalid (probably means " | |
841 | "target device no longer present)\n", | |
842 | cp); | |
843 | /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0); | |
844 | print_cmd(cp); */ | |
845 | } | |
846 | break; | |
847 | case CMD_PROTOCOL_ERR: | |
848 | printk(KERN_WARNING "cciss: cp %p has " | |
849 | "protocol error \n", cp); | |
850 | break; | |
851 | case CMD_HARDWARE_ERR: | |
852 | /* cmd->result = DID_ERROR << 16; */ | |
853 | printk(KERN_WARNING "cciss: cp %p had " | |
854 | " hardware error\n", cp); | |
855 | break; | |
856 | case CMD_CONNECTION_LOST: | |
857 | printk(KERN_WARNING "cciss: cp %p had " | |
858 | "connection lost\n", cp); | |
859 | break; | |
860 | case CMD_ABORTED: | |
861 | printk(KERN_WARNING "cciss: cp %p was " | |
862 | "aborted\n", cp); | |
863 | break; | |
864 | case CMD_ABORT_FAILED: | |
865 | printk(KERN_WARNING "cciss: cp %p reports " | |
866 | "abort failed\n", cp); | |
867 | break; | |
868 | case CMD_UNSOLICITED_ABORT: | |
869 | printk(KERN_WARNING "cciss: cp %p aborted " | |
870 | "do to an unsolicited abort\n", cp); | |
871 | break; | |
872 | case CMD_TIMEOUT: | |
873 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
874 | cp); | |
875 | break; | |
876 | default: | |
877 | printk(KERN_WARNING "cciss: cp %p returned " | |
878 | "unknown status %x\n", cp, | |
879 | ei->CommandStatus); | |
880 | } | |
881 | } | |
882 | ||
883 | static int | |
884 | cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr, | |
885 | unsigned char *buf, unsigned char bufsize) | |
886 | { | |
887 | int rc; | |
888 | CommandList_struct *cp; | |
889 | char cdb[6]; | |
890 | ErrorInfo_struct *ei; | |
891 | unsigned long flags; | |
892 | ||
893 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
894 | cp = scsi_cmd_alloc(c); | |
895 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
896 | ||
897 | if (cp == NULL) { /* trouble... */ | |
898 | printk("cmd_alloc returned NULL!\n"); | |
899 | return -1; | |
900 | } | |
901 | ||
902 | ei = cp->err_info; | |
903 | ||
904 | cdb[0] = CISS_INQUIRY; | |
905 | cdb[1] = 0; | |
906 | cdb[2] = 0; | |
907 | cdb[3] = 0; | |
908 | cdb[4] = bufsize; | |
909 | cdb[5] = 0; | |
910 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb, | |
911 | 6, buf, bufsize, XFER_READ); | |
912 | ||
913 | if (rc != 0) return rc; /* something went wrong */ | |
914 | ||
915 | if (ei->CommandStatus != 0 && | |
916 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
917 | cciss_scsi_interpret_error(cp); | |
918 | rc = -1; | |
919 | } | |
920 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
921 | scsi_cmd_free(c, cp); | |
922 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
923 | return rc; | |
924 | } | |
925 | ||
926 | static int | |
927 | cciss_scsi_do_report_phys_luns(ctlr_info_t *c, | |
928 | ReportLunData_struct *buf, int bufsize) | |
929 | { | |
930 | int rc; | |
931 | CommandList_struct *cp; | |
932 | unsigned char cdb[12]; | |
933 | unsigned char scsi3addr[8]; | |
934 | ErrorInfo_struct *ei; | |
935 | unsigned long flags; | |
936 | ||
937 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
938 | cp = scsi_cmd_alloc(c); | |
939 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
940 | if (cp == NULL) { /* trouble... */ | |
941 | printk("cmd_alloc returned NULL!\n"); | |
942 | return -1; | |
943 | } | |
944 | ||
945 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
946 | cdb[0] = CISS_REPORT_PHYS; | |
947 | cdb[1] = 0; | |
948 | cdb[2] = 0; | |
949 | cdb[3] = 0; | |
950 | cdb[4] = 0; | |
951 | cdb[5] = 0; | |
952 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
953 | cdb[7] = (bufsize >> 16) & 0xFF; | |
954 | cdb[8] = (bufsize >> 8) & 0xFF; | |
955 | cdb[9] = bufsize & 0xFF; | |
956 | cdb[10] = 0; | |
957 | cdb[11] = 0; | |
958 | ||
959 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, | |
960 | cdb, 12, | |
961 | (unsigned char *) buf, | |
962 | bufsize, XFER_READ); | |
963 | ||
964 | if (rc != 0) return rc; /* something went wrong */ | |
965 | ||
966 | ei = cp->err_info; | |
967 | if (ei->CommandStatus != 0 && | |
968 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
969 | cciss_scsi_interpret_error(cp); | |
970 | rc = -1; | |
971 | } | |
972 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
973 | scsi_cmd_free(c, cp); | |
974 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
975 | return rc; | |
976 | } | |
977 | ||
978 | static void | |
979 | cciss_update_non_disk_devices(int cntl_num, int hostno) | |
980 | { | |
981 | /* the idea here is we could get notified from /proc | |
982 | that some devices have changed, so we do a report | |
983 | physical luns cmd, and adjust our list of devices | |
984 | accordingly. (We can't rely on the scsi-mid layer just | |
985 | doing inquiries, because the "busses" that the scsi | |
986 | mid-layer probes are totally fabricated by this driver, | |
987 | so new devices wouldn't show up. | |
988 | ||
989 | the scsi3addr's of devices won't change so long as the | |
990 | adapter is not reset. That means we can rescan and | |
991 | tell which devices we already know about, vs. new | |
992 | devices, vs. disappearing devices. | |
993 | ||
994 | Also, if you yank out a tape drive, then put in a disk | |
995 | in it's place, (say, a configured volume from another | |
996 | array controller for instance) _don't_ poke this driver | |
997 | (so it thinks it's still a tape, but _do_ poke the scsi | |
998 | mid layer, so it does an inquiry... the scsi mid layer | |
999 | will see the physical disk. This would be bad. Need to | |
1000 | think about how to prevent that. One idea would be to | |
1001 | snoop all scsi responses and if an inquiry repsonse comes | |
1002 | back that reports a disk, chuck it an return selection | |
1003 | timeout instead and adjust our table... Not sure i like | |
1004 | that though. | |
1005 | ||
1006 | */ | |
1007 | #define OBDR_TAPE_INQ_SIZE 49 | |
1008 | #define OBDR_TAPE_SIG "$DR-10" | |
1009 | ReportLunData_struct *ld_buff; | |
1010 | unsigned char *inq_buff; | |
1011 | unsigned char scsi3addr[8]; | |
1012 | ctlr_info_t *c; | |
1013 | __u32 num_luns=0; | |
1014 | unsigned char *ch; | |
1015 | /* unsigned char found[CCISS_MAX_SCSI_DEVS_PER_HBA]; */ | |
1016 | struct cciss_scsi_dev_t currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
1017 | int ncurrent=0; | |
1018 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1019 | int i; | |
1020 | ||
1021 | c = (ctlr_info_t *) hba[cntl_num]; | |
1022 | ld_buff = kmalloc(reportlunsize, GFP_KERNEL); | |
1023 | if (ld_buff == NULL) { | |
1024 | printk(KERN_ERR "cciss: out of memory\n"); | |
1025 | return; | |
1026 | } | |
1027 | memset(ld_buff, 0, reportlunsize); | |
1028 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); | |
1029 | if (inq_buff == NULL) { | |
1030 | printk(KERN_ERR "cciss: out of memory\n"); | |
1031 | kfree(ld_buff); | |
1032 | return; | |
1033 | } | |
1034 | ||
1035 | if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) { | |
1036 | ch = &ld_buff->LUNListLength[0]; | |
1037 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1038 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1039 | printk(KERN_WARNING | |
1040 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1041 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1042 | num_luns - CISS_MAX_PHYS_LUN); | |
1043 | num_luns = CISS_MAX_PHYS_LUN; | |
1044 | } | |
1045 | } | |
1046 | else { | |
1047 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1048 | goto out; | |
1049 | } | |
1050 | ||
1051 | ||
1052 | /* adjust our table of devices */ | |
1053 | for(i=0; i<num_luns; i++) | |
1054 | { | |
1055 | int devtype; | |
1056 | ||
1057 | /* for each physical lun, do an inquiry */ | |
1058 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
1059 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); | |
1060 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); | |
1061 | ||
1062 | if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, inq_buff, | |
1063 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) { | |
1064 | /* Inquiry failed (msg printed already) */ | |
1065 | devtype = 0; /* so we will skip this device. */ | |
1066 | } else /* what kind of device is this? */ | |
1067 | devtype = (inq_buff[0] & 0x1f); | |
1068 | ||
1069 | switch (devtype) | |
1070 | { | |
1071 | case 0x05: /* CD-ROM */ { | |
1072 | ||
1073 | /* We don't *really* support actual CD-ROM devices, | |
1074 | * just this "One Button Disaster Recovery" tape drive | |
1075 | * which temporarily pretends to be a CD-ROM drive. | |
1076 | * So we check that the device is really an OBDR tape | |
1077 | * device by checking for "$DR-10" in bytes 43-48 of | |
1078 | * the inquiry data. | |
1079 | */ | |
1080 | char obdr_sig[7]; | |
1081 | ||
1082 | strncpy(obdr_sig, &inq_buff[43], 6); | |
1083 | obdr_sig[6] = '\0'; | |
1084 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) | |
1085 | /* Not OBDR device, ignore it. */ | |
1086 | break; | |
1087 | } | |
1088 | /* fall through . . . */ | |
1089 | case 0x01: /* sequential access, (tape) */ | |
1090 | case 0x08: /* medium changer */ | |
1091 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1092 | printk(KERN_INFO "cciss%d: %s ignored, " | |
1093 | "too many devices.\n", cntl_num, | |
1094 | DEVICETYPE(devtype)); | |
1095 | break; | |
1096 | } | |
1097 | memcpy(¤tsd[ncurrent].scsi3addr[0], | |
1098 | &scsi3addr[0], 8); | |
1099 | currentsd[ncurrent].devtype = devtype; | |
1100 | currentsd[ncurrent].bus = -1; | |
1101 | currentsd[ncurrent].target = -1; | |
1102 | currentsd[ncurrent].lun = -1; | |
1103 | ncurrent++; | |
1104 | break; | |
1105 | default: | |
1106 | break; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent); | |
1111 | out: | |
1112 | kfree(inq_buff); | |
1113 | kfree(ld_buff); | |
1114 | return; | |
1115 | } | |
1116 | ||
1117 | static int | |
1118 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1119 | { | |
1120 | int verb_len = strlen(verb); | |
1121 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1122 | return verb_len; | |
1123 | else | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | static int | |
1128 | cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length) | |
1129 | { | |
1130 | int arg_len; | |
1131 | ||
1132 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
1133 | cciss_update_non_disk_devices(ctlr, hostno); | |
1134 | else | |
1135 | return -EINVAL; | |
1136 | return length; | |
1137 | } | |
1138 | ||
1139 | ||
1140 | static int | |
1141 | cciss_scsi_proc_info(struct Scsi_Host *sh, | |
1142 | char *buffer, /* data buffer */ | |
1143 | char **start, /* where data in buffer starts */ | |
1144 | off_t offset, /* offset from start of imaginary file */ | |
1145 | int length, /* length of data in buffer */ | |
1146 | int func) /* 0 == read, 1 == write */ | |
1147 | { | |
1148 | ||
1149 | int buflen, datalen; | |
1150 | ctlr_info_t *ci; | |
1151 | int i; | |
1152 | int cntl_num; | |
1153 | ||
1154 | ||
1155 | ci = (ctlr_info_t *) sh->hostdata[0]; | |
1156 | if (ci == NULL) /* This really shouldn't ever happen. */ | |
1157 | return -EINVAL; | |
1158 | ||
1159 | cntl_num = ci->ctlr; /* Get our index into the hba[] array */ | |
1160 | ||
1161 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ | |
1162 | buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", | |
1163 | cntl_num, sh->host_no); | |
1164 | ||
1165 | /* this information is needed by apps to know which cciss | |
1166 | device corresponds to which scsi host number without | |
1167 | having to open a scsi target device node. The device | |
1168 | information is not a duplicate of /proc/scsi/scsi because | |
1169 | the two may be out of sync due to scsi hotplug, rather | |
1170 | this info is for an app to be able to use to know how to | |
1171 | get them back in sync. */ | |
1172 | ||
1173 | for (i=0;i<ccissscsi[cntl_num].ndevices;i++) { | |
1174 | struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i]; | |
1175 | buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " | |
1176 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
1177 | sh->host_no, sd->bus, sd->target, sd->lun, | |
1178 | sd->devtype, | |
1179 | sd->scsi3addr[0], sd->scsi3addr[1], | |
1180 | sd->scsi3addr[2], sd->scsi3addr[3], | |
1181 | sd->scsi3addr[4], sd->scsi3addr[5], | |
1182 | sd->scsi3addr[6], sd->scsi3addr[7]); | |
1183 | } | |
1184 | datalen = buflen - offset; | |
1185 | if (datalen < 0) { /* they're reading past EOF. */ | |
1186 | datalen = 0; | |
1187 | *start = buffer+buflen; | |
1188 | } else | |
1189 | *start = buffer + offset; | |
1190 | return(datalen); | |
1191 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ | |
1192 | return cciss_scsi_user_command(cntl_num, sh->host_no, | |
1193 | buffer, length); | |
1194 | } | |
1195 | ||
1196 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1197 | dma mapping and fills in the scatter gather entries of the | |
1198 | cciss command, cp. */ | |
1199 | ||
1200 | static void | |
1201 | cciss_scatter_gather(struct pci_dev *pdev, | |
1202 | CommandList_struct *cp, | |
1203 | struct scsi_cmnd *cmd) | |
1204 | { | |
1205 | unsigned int use_sg, nsegs=0, len; | |
1206 | struct scatterlist *scatter = (struct scatterlist *) cmd->buffer; | |
1207 | __u64 addr64; | |
1208 | ||
1209 | /* is it just one virtual address? */ | |
1210 | if (!cmd->use_sg) { | |
1211 | if (cmd->request_bufflen) { /* anything to xfer? */ | |
1212 | ||
1213 | addr64 = (__u64) pci_map_single(pdev, | |
1214 | cmd->request_buffer, | |
1215 | cmd->request_bufflen, | |
1216 | cmd->sc_data_direction); | |
1217 | ||
1218 | cp->SG[0].Addr.lower = | |
1219 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
1220 | cp->SG[0].Addr.upper = | |
1221 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
1222 | cp->SG[0].Len = cmd->request_bufflen; | |
1223 | nsegs=1; | |
1224 | } | |
1225 | } /* else, must be a list of virtual addresses.... */ | |
1226 | else if (cmd->use_sg <= MAXSGENTRIES) { /* not too many addrs? */ | |
1227 | ||
1228 | use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, | |
1229 | cmd->sc_data_direction); | |
1230 | ||
1231 | for (nsegs=0; nsegs < use_sg; nsegs++) { | |
1232 | addr64 = (__u64) sg_dma_address(&scatter[nsegs]); | |
1233 | len = sg_dma_len(&scatter[nsegs]); | |
1234 | cp->SG[nsegs].Addr.lower = | |
1235 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
1236 | cp->SG[nsegs].Addr.upper = | |
1237 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
1238 | cp->SG[nsegs].Len = len; | |
1239 | cp->SG[nsegs].Ext = 0; // we are not chaining | |
1240 | } | |
1241 | } else BUG(); | |
1242 | ||
1243 | cp->Header.SGList = (__u8) nsegs; /* no. SGs contig in this cmd */ | |
1244 | cp->Header.SGTotal = (__u16) nsegs; /* total sgs in this cmd list */ | |
1245 | return; | |
1246 | } | |
1247 | ||
1248 | ||
1249 | static int | |
1250 | cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) | |
1251 | { | |
1252 | ctlr_info_t **c; | |
1253 | int ctlr, rc; | |
1254 | unsigned char scsi3addr[8]; | |
1255 | CommandList_struct *cp; | |
1256 | unsigned long flags; | |
1257 | ||
1258 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1259 | // We violate cmd->host privacy here. (Is there another way?) | |
1260 | c = (ctlr_info_t **) &cmd->device->host->hostdata[0]; | |
1261 | ctlr = (*c)->ctlr; | |
1262 | ||
1263 | rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id, | |
1264 | cmd->device->lun, scsi3addr); | |
1265 | if (rc != 0) { | |
1266 | /* the scsi nexus does not match any that we presented... */ | |
1267 | /* pretend to mid layer that we got selection timeout */ | |
1268 | cmd->result = DID_NO_CONNECT << 16; | |
1269 | done(cmd); | |
1270 | /* we might want to think about registering controller itself | |
1271 | as a processor device on the bus so sg binds to it. */ | |
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | /* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n", | |
1276 | cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/ | |
1277 | // printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel, | |
1278 | // cmd->target, cmd->lun); | |
1279 | ||
1280 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and | |
1281 | see what the device thinks of it. */ | |
1282 | ||
1283 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1284 | cp = scsi_cmd_alloc(*c); | |
1285 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1286 | if (cp == NULL) { /* trouble... */ | |
1287 | printk("scsi_cmd_alloc returned NULL!\n"); | |
1288 | /* FIXME: next 3 lines are -> BAD! <- */ | |
1289 | cmd->result = DID_NO_CONNECT << 16; | |
1290 | done(cmd); | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | // Fill in the command list header | |
1295 | ||
1296 | cmd->scsi_done = done; // save this for use by completion code | |
1297 | ||
1298 | // save cp in case we have to abort it | |
1299 | cmd->host_scribble = (unsigned char *) cp; | |
1300 | ||
1301 | cp->cmd_type = CMD_SCSI; | |
1302 | cp->scsi_cmd = cmd; | |
1303 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
1304 | memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1305 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
1306 | ||
1307 | // Fill in the request block... | |
1308 | ||
1309 | cp->Request.Timeout = 0; | |
1310 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
1311 | if (cmd->cmd_len > sizeof(cp->Request.CDB)) BUG(); | |
1312 | cp->Request.CDBLen = cmd->cmd_len; | |
1313 | memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1314 | cp->Request.Type.Type = TYPE_CMD; | |
1315 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
1316 | switch(cmd->sc_data_direction) | |
1317 | { | |
1318 | case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break; | |
1319 | case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break; | |
1320 | case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break; | |
1321 | case DMA_BIDIRECTIONAL: | |
1322 | // This can happen if a buggy application does a scsi passthru | |
1323 | // and sets both inlen and outlen to non-zero. ( see | |
1324 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1325 | ||
1326 | cp->Request.Type.Direction = XFER_RSVD; | |
1327 | // This is technically wrong, and cciss controllers should | |
1328 | // reject it with CMD_INVALID, which is the most correct | |
1329 | // response, but non-fibre backends appear to let it | |
1330 | // slide by, and give the same results as if this field | |
1331 | // were set correctly. Either way is acceptable for | |
1332 | // our purposes here. | |
1333 | ||
1334 | break; | |
1335 | ||
1336 | default: | |
1337 | printk("cciss: unknown data direction: %d\n", | |
1338 | cmd->sc_data_direction); | |
1339 | BUG(); | |
1340 | break; | |
1341 | } | |
1342 | ||
1343 | cciss_scatter_gather((*c)->pdev, cp, cmd); // Fill the SG list | |
1344 | ||
1345 | /* Put the request on the tail of the request queue */ | |
1346 | ||
1347 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1348 | addQ(&(*c)->reqQ, cp); | |
1349 | (*c)->Qdepth++; | |
1350 | start_io(*c); | |
1351 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1352 | ||
1353 | /* the cmd'll come back via intr handler in complete_scsi_command() */ | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static void | |
1358 | cciss_unregister_scsi(int ctlr) | |
1359 | { | |
1360 | struct cciss_scsi_adapter_data_t *sa; | |
1361 | struct cciss_scsi_cmd_stack_t *stk; | |
1362 | unsigned long flags; | |
1363 | ||
1364 | /* we are being forcibly unloaded, and may not refuse. */ | |
1365 | ||
1366 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1367 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
1368 | stk = &sa->cmd_stack; | |
1369 | ||
1370 | /* if we weren't ever actually registered, don't unregister */ | |
1371 | if (sa->registered) { | |
1372 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1373 | scsi_remove_host(sa->scsi_host); | |
1374 | scsi_host_put(sa->scsi_host); | |
1375 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1376 | } | |
1377 | ||
1378 | /* set scsi_host to NULL so our detect routine will | |
1379 | find us on register */ | |
1380 | sa->scsi_host = NULL; | |
1381 | scsi_cmd_stack_free(ctlr); | |
1382 | kfree(sa); | |
1383 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1384 | } | |
1385 | ||
1386 | static int | |
1387 | cciss_register_scsi(int ctlr) | |
1388 | { | |
1389 | unsigned long flags; | |
1390 | ||
1391 | CPQ_TAPE_LOCK(ctlr, flags); | |
1392 | ||
1393 | /* Since this is really a block driver, the SCSI core may not be | |
1394 | initialized at init time, in which case, calling scsi_register_host | |
1395 | would hang. Instead, we do it later, via /proc filesystem | |
1396 | and rc scripts, when we know SCSI core is good to go. */ | |
1397 | ||
1398 | /* Only register if SCSI devices are detected. */ | |
1399 | if (ccissscsi[ctlr].ndevices != 0) { | |
1400 | ((struct cciss_scsi_adapter_data_t *) | |
1401 | hba[ctlr]->scsi_ctlr)->registered = 1; | |
1402 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1403 | return cciss_scsi_detect(ctlr); | |
1404 | } | |
1405 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1406 | printk(KERN_INFO | |
1407 | "cciss%d: No appropriate SCSI device detected, " | |
1408 | "SCSI subsystem not engaged.\n", ctlr); | |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | static int | |
1413 | cciss_engage_scsi(int ctlr) | |
1414 | { | |
1415 | struct cciss_scsi_adapter_data_t *sa; | |
1416 | struct cciss_scsi_cmd_stack_t *stk; | |
1417 | unsigned long flags; | |
1418 | ||
1419 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1420 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
1421 | stk = &sa->cmd_stack; | |
1422 | ||
1423 | if (((struct cciss_scsi_adapter_data_t *) | |
1424 | hba[ctlr]->scsi_ctlr)->registered) { | |
1425 | printk("cciss%d: SCSI subsystem already engaged.\n", ctlr); | |
1426 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1427 | return ENXIO; | |
1428 | } | |
1429 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1430 | cciss_update_non_disk_devices(ctlr, -1); | |
1431 | cciss_register_scsi(ctlr); | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | static void | |
1436 | cciss_proc_tape_report(int ctlr, unsigned char *buffer, off_t *pos, off_t *len) | |
1437 | { | |
1438 | unsigned long flags; | |
1439 | int size; | |
1440 | ||
1441 | *pos = *pos -1; *len = *len - 1; // cut off the last trailing newline | |
1442 | ||
1443 | CPQ_TAPE_LOCK(ctlr, flags); | |
1444 | size = sprintf(buffer + *len, | |
1445 | "Sequential access devices: %d\n\n", | |
1446 | ccissscsi[ctlr].ndevices); | |
1447 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1448 | *pos += size; *len += size; | |
1449 | } | |
1450 | ||
1451 | #else /* no CONFIG_CISS_SCSI_TAPE */ | |
1452 | ||
1453 | /* If no tape support, then these become defined out of existence */ | |
1454 | ||
1455 | #define cciss_scsi_setup(cntl_num) | |
1456 | #define cciss_unregister_scsi(ctlr) | |
1457 | #define cciss_register_scsi(ctlr) | |
1458 | #define cciss_proc_tape_report(ctlr, buffer, pos, len) | |
1459 | ||
1460 | #endif /* CONFIG_CISS_SCSI_TAPE */ |