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1da177e4 LT |
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 <scsi/scsi.h> | |
32 | #include <scsi/scsi_cmnd.h> | |
33 | #include <scsi/scsi_device.h> | |
34 | #include <scsi/scsi_host.h> | |
35 | #include <asm/atomic.h> | |
36 | #include <linux/timer.h> | |
37 | #include <linux/completion.h> | |
38 | ||
39 | #include "cciss_scsi.h" | |
40 | ||
41 | /* some prototypes... */ | |
42 | static int sendcmd( | |
43 | __u8 cmd, | |
44 | int ctlr, | |
45 | void *buff, | |
46 | size_t size, | |
47 | unsigned int use_unit_num, /* 0: address the controller, | |
48 | 1: address logical volume log_unit, | |
49 | 2: address is in scsi3addr */ | |
50 | unsigned int log_unit, | |
51 | __u8 page_code, | |
52 | unsigned char *scsi3addr, | |
53 | int cmd_type); | |
54 | ||
55 | ||
56 | static int cciss_scsi_proc_info( | |
57 | struct Scsi_Host *sh, | |
58 | char *buffer, /* data buffer */ | |
59 | char **start, /* where data in buffer starts */ | |
60 | off_t offset, /* offset from start of imaginary file */ | |
61 | int length, /* length of data in buffer */ | |
62 | int func); /* 0 == read, 1 == write */ | |
63 | ||
64 | static int cciss_scsi_queue_command (struct scsi_cmnd *cmd, | |
65 | void (* done)(struct scsi_cmnd *)); | |
66 | ||
67 | static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { | |
68 | { .name = "cciss0", .ndevices = 0 }, | |
69 | { .name = "cciss1", .ndevices = 0 }, | |
70 | { .name = "cciss2", .ndevices = 0 }, | |
71 | { .name = "cciss3", .ndevices = 0 }, | |
72 | { .name = "cciss4", .ndevices = 0 }, | |
73 | { .name = "cciss5", .ndevices = 0 }, | |
74 | { .name = "cciss6", .ndevices = 0 }, | |
75 | { .name = "cciss7", .ndevices = 0 }, | |
76 | }; | |
77 | ||
78 | static struct scsi_host_template cciss_driver_template = { | |
79 | .module = THIS_MODULE, | |
80 | .name = "cciss", | |
81 | .proc_name = "cciss", | |
82 | .proc_info = cciss_scsi_proc_info, | |
83 | .queuecommand = cciss_scsi_queue_command, | |
84 | .can_queue = SCSI_CCISS_CAN_QUEUE, | |
85 | .this_id = 7, | |
86 | .sg_tablesize = MAXSGENTRIES, | |
87 | .cmd_per_lun = 1, | |
88 | .use_clustering = DISABLE_CLUSTERING, | |
89 | }; | |
90 | ||
91 | #pragma pack(1) | |
92 | struct cciss_scsi_cmd_stack_elem_t { | |
93 | CommandList_struct cmd; | |
94 | ErrorInfo_struct Err; | |
95 | __u32 busaddr; | |
33079b21 | 96 | __u32 pad; |
1da177e4 LT |
97 | }; |
98 | ||
99 | #pragma pack() | |
100 | ||
101 | #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \ | |
102 | CCISS_MAX_SCSI_DEVS_PER_HBA + 2) | |
103 | // plus two for init time usage | |
104 | ||
105 | #pragma pack(1) | |
106 | struct cciss_scsi_cmd_stack_t { | |
107 | struct cciss_scsi_cmd_stack_elem_t *pool; | |
108 | struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE]; | |
109 | dma_addr_t cmd_pool_handle; | |
110 | int top; | |
111 | }; | |
112 | #pragma pack() | |
113 | ||
114 | struct cciss_scsi_adapter_data_t { | |
115 | struct Scsi_Host *scsi_host; | |
116 | struct cciss_scsi_cmd_stack_t cmd_stack; | |
117 | int registered; | |
118 | spinlock_t lock; // to protect ccissscsi[ctlr]; | |
119 | }; | |
120 | ||
121 | #define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \ | |
122 | &(((struct cciss_scsi_adapter_data_t *) \ | |
123 | hba[ctlr]->scsi_ctlr)->lock), flags); | |
124 | #define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \ | |
125 | &(((struct cciss_scsi_adapter_data_t *) \ | |
126 | hba[ctlr]->scsi_ctlr)->lock), flags); | |
127 | ||
128 | static CommandList_struct * | |
129 | scsi_cmd_alloc(ctlr_info_t *h) | |
130 | { | |
131 | /* assume only one process in here at a time, locking done by caller. */ | |
132 | /* use CCISS_LOCK(ctlr) */ | |
133 | /* might be better to rewrite how we allocate scsi commands in a way that */ | |
134 | /* needs no locking at all. */ | |
135 | ||
136 | /* take the top memory chunk off the stack and return it, if any. */ | |
137 | struct cciss_scsi_cmd_stack_elem_t *c; | |
138 | struct cciss_scsi_adapter_data_t *sa; | |
139 | struct cciss_scsi_cmd_stack_t *stk; | |
140 | u64bit temp64; | |
141 | ||
142 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; | |
143 | stk = &sa->cmd_stack; | |
144 | ||
145 | if (stk->top < 0) | |
146 | return NULL; | |
147 | c = stk->elem[stk->top]; | |
148 | /* memset(c, 0, sizeof(*c)); */ | |
149 | memset(&c->cmd, 0, sizeof(c->cmd)); | |
150 | memset(&c->Err, 0, sizeof(c->Err)); | |
151 | /* set physical addr of cmd and addr of scsi parameters */ | |
152 | c->cmd.busaddr = c->busaddr; | |
153 | /* (__u32) (stk->cmd_pool_handle + | |
154 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ | |
155 | ||
156 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); | |
157 | /* (__u64) (stk->cmd_pool_handle + | |
158 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + | |
159 | sizeof(CommandList_struct)); */ | |
160 | stk->top--; | |
161 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; | |
162 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; | |
163 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); | |
164 | ||
165 | c->cmd.ctlr = h->ctlr; | |
166 | c->cmd.err_info = &c->Err; | |
167 | ||
168 | return (CommandList_struct *) c; | |
169 | } | |
170 | ||
171 | static void | |
172 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd) | |
173 | { | |
174 | /* assume only one process in here at a time, locking done by caller. */ | |
175 | /* use CCISS_LOCK(ctlr) */ | |
176 | /* drop the free memory chunk on top of the stack. */ | |
177 | ||
178 | struct cciss_scsi_adapter_data_t *sa; | |
179 | struct cciss_scsi_cmd_stack_t *stk; | |
180 | ||
181 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; | |
182 | stk = &sa->cmd_stack; | |
183 | if (stk->top >= CMD_STACK_SIZE) { | |
184 | printk("cciss: scsi_cmd_free called too many times.\n"); | |
185 | BUG(); | |
186 | } | |
187 | stk->top++; | |
188 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd; | |
189 | } | |
190 | ||
191 | static int | |
192 | scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa) | |
193 | { | |
194 | int i; | |
195 | struct cciss_scsi_cmd_stack_t *stk; | |
196 | size_t size; | |
197 | ||
198 | stk = &sa->cmd_stack; | |
199 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
200 | ||
201 | // pci_alloc_consistent guarantees 32-bit DMA address will | |
202 | // be used | |
203 | ||
204 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) | |
205 | pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle); | |
206 | ||
207 | if (stk->pool == NULL) { | |
208 | printk("stk->pool is null\n"); | |
209 | return -1; | |
210 | } | |
211 | ||
212 | for (i=0; i<CMD_STACK_SIZE; i++) { | |
213 | stk->elem[i] = &stk->pool[i]; | |
214 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + | |
215 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); | |
216 | } | |
217 | stk->top = CMD_STACK_SIZE-1; | |
218 | return 0; | |
219 | } | |
220 | ||
221 | static void | |
222 | scsi_cmd_stack_free(int ctlr) | |
223 | { | |
224 | struct cciss_scsi_adapter_data_t *sa; | |
225 | struct cciss_scsi_cmd_stack_t *stk; | |
226 | size_t size; | |
227 | ||
228 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
229 | stk = &sa->cmd_stack; | |
230 | if (stk->top != CMD_STACK_SIZE-1) { | |
231 | printk( "cciss: %d scsi commands are still outstanding.\n", | |
232 | CMD_STACK_SIZE - stk->top); | |
233 | // BUG(); | |
234 | printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk); | |
235 | } | |
236 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; | |
237 | ||
238 | pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle); | |
239 | stk->pool = NULL; | |
240 | } | |
241 | ||
242 | /* scsi_device_types comes from scsi.h */ | |
243 | #define DEVICETYPE(n) (n<0 || n>MAX_SCSI_DEVICE_CODE) ? \ | |
244 | "Unknown" : scsi_device_types[n] | |
245 | ||
246 | #if 0 | |
247 | static int xmargin=8; | |
248 | static int amargin=60; | |
249 | ||
250 | static void | |
251 | print_bytes (unsigned char *c, int len, int hex, int ascii) | |
252 | { | |
253 | ||
254 | int i; | |
255 | unsigned char *x; | |
256 | ||
257 | if (hex) | |
258 | { | |
259 | x = c; | |
260 | for (i=0;i<len;i++) | |
261 | { | |
262 | if ((i % xmargin) == 0 && i>0) printk("\n"); | |
263 | if ((i % xmargin) == 0) printk("0x%04x:", i); | |
264 | printk(" %02x", *x); | |
265 | x++; | |
266 | } | |
267 | printk("\n"); | |
268 | } | |
269 | if (ascii) | |
270 | { | |
271 | x = c; | |
272 | for (i=0;i<len;i++) | |
273 | { | |
274 | if ((i % amargin) == 0 && i>0) printk("\n"); | |
275 | if ((i % amargin) == 0) printk("0x%04x:", i); | |
276 | if (*x > 26 && *x < 128) printk("%c", *x); | |
277 | else printk("."); | |
278 | x++; | |
279 | } | |
280 | printk("\n"); | |
281 | } | |
282 | } | |
283 | ||
284 | static void | |
285 | print_cmd(CommandList_struct *cp) | |
286 | { | |
287 | printk("queue:%d\n", cp->Header.ReplyQueue); | |
288 | printk("sglist:%d\n", cp->Header.SGList); | |
289 | printk("sgtot:%d\n", cp->Header.SGTotal); | |
290 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, | |
291 | cp->Header.Tag.lower); | |
292 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", | |
293 | cp->Header.LUN.LunAddrBytes[0], | |
294 | cp->Header.LUN.LunAddrBytes[1], | |
295 | cp->Header.LUN.LunAddrBytes[2], | |
296 | cp->Header.LUN.LunAddrBytes[3], | |
297 | cp->Header.LUN.LunAddrBytes[4], | |
298 | cp->Header.LUN.LunAddrBytes[5], | |
299 | cp->Header.LUN.LunAddrBytes[6], | |
300 | cp->Header.LUN.LunAddrBytes[7]); | |
301 | printk("CDBLen:%d\n", cp->Request.CDBLen); | |
302 | printk("Type:%d\n",cp->Request.Type.Type); | |
303 | printk("Attr:%d\n",cp->Request.Type.Attribute); | |
304 | printk(" Dir:%d\n",cp->Request.Type.Direction); | |
305 | printk("Timeout:%d\n",cp->Request.Timeout); | |
306 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" | |
307 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
308 | cp->Request.CDB[0], cp->Request.CDB[1], | |
309 | cp->Request.CDB[2], cp->Request.CDB[3], | |
310 | cp->Request.CDB[4], cp->Request.CDB[5], | |
311 | cp->Request.CDB[6], cp->Request.CDB[7], | |
312 | cp->Request.CDB[8], cp->Request.CDB[9], | |
313 | cp->Request.CDB[10], cp->Request.CDB[11], | |
314 | cp->Request.CDB[12], cp->Request.CDB[13], | |
315 | cp->Request.CDB[14], cp->Request.CDB[15]), | |
316 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", | |
317 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, | |
318 | cp->ErrDesc.Len); | |
319 | printk("sgs..........Errorinfo:\n"); | |
320 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); | |
321 | printk("senselen:%d\n", cp->err_info->SenseLen); | |
322 | printk("cmd status:%d\n", cp->err_info->CommandStatus); | |
323 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); | |
324 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); | |
325 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); | |
326 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); | |
327 | ||
328 | } | |
329 | ||
330 | #endif | |
331 | ||
332 | static int | |
333 | find_bus_target_lun(int ctlr, int *bus, int *target, int *lun) | |
334 | { | |
335 | /* finds an unused bus, target, lun for a new device */ | |
336 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
337 | int i, found=0; | |
338 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
339 | ||
340 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); | |
341 | ||
342 | target_taken[SELF_SCSI_ID] = 1; | |
343 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) | |
344 | target_taken[ccissscsi[ctlr].dev[i].target] = 1; | |
345 | ||
346 | for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) { | |
347 | if (!target_taken[i]) { | |
348 | *bus = 0; *target=i; *lun = 0; found=1; | |
349 | break; | |
350 | } | |
351 | } | |
352 | return (!found); | |
353 | } | |
354 | ||
355 | static int | |
356 | cciss_scsi_add_entry(int ctlr, int hostno, | |
357 | unsigned char *scsi3addr, int devtype) | |
358 | { | |
359 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
360 | int n = ccissscsi[ctlr].ndevices; | |
361 | struct cciss_scsi_dev_t *sd; | |
362 | ||
363 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
364 | printk("cciss%d: Too many devices, " | |
365 | "some will be inaccessible.\n", ctlr); | |
366 | return -1; | |
367 | } | |
368 | sd = &ccissscsi[ctlr].dev[n]; | |
369 | if (find_bus_target_lun(ctlr, &sd->bus, &sd->target, &sd->lun) != 0) | |
370 | return -1; | |
371 | memcpy(&sd->scsi3addr[0], scsi3addr, 8); | |
372 | sd->devtype = devtype; | |
373 | ccissscsi[ctlr].ndevices++; | |
374 | ||
375 | /* initially, (before registering with scsi layer) we don't | |
376 | know our hostno and we don't want to print anything first | |
377 | time anyway (the scsi layer's inquiries will show that info) */ | |
378 | if (hostno != -1) | |
379 | printk("cciss%d: %s device c%db%dt%dl%d added.\n", | |
380 | ctlr, DEVICETYPE(sd->devtype), hostno, | |
381 | sd->bus, sd->target, sd->lun); | |
382 | return 0; | |
383 | } | |
384 | ||
385 | static void | |
386 | cciss_scsi_remove_entry(int ctlr, int hostno, int entry) | |
387 | { | |
388 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ | |
389 | int i; | |
390 | struct cciss_scsi_dev_t sd; | |
391 | ||
392 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; | |
393 | sd = ccissscsi[ctlr].dev[entry]; | |
394 | for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++) | |
395 | ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1]; | |
396 | ccissscsi[ctlr].ndevices--; | |
397 | printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
398 | ctlr, DEVICETYPE(sd.devtype), hostno, | |
399 | sd.bus, sd.target, sd.lun); | |
400 | } | |
401 | ||
402 | ||
403 | #define SCSI3ADDR_EQ(a,b) ( \ | |
404 | (a)[7] == (b)[7] && \ | |
405 | (a)[6] == (b)[6] && \ | |
406 | (a)[5] == (b)[5] && \ | |
407 | (a)[4] == (b)[4] && \ | |
408 | (a)[3] == (b)[3] && \ | |
409 | (a)[2] == (b)[2] && \ | |
410 | (a)[1] == (b)[1] && \ | |
411 | (a)[0] == (b)[0]) | |
412 | ||
413 | static int | |
414 | adjust_cciss_scsi_table(int ctlr, int hostno, | |
415 | struct cciss_scsi_dev_t sd[], int nsds) | |
416 | { | |
417 | /* sd contains scsi3 addresses and devtypes, but | |
418 | bus target and lun are not filled in. This funciton | |
419 | takes what's in sd to be the current and adjusts | |
420 | ccissscsi[] to be in line with what's in sd. */ | |
421 | ||
422 | int i,j, found, changes=0; | |
423 | struct cciss_scsi_dev_t *csd; | |
424 | unsigned long flags; | |
425 | ||
426 | CPQ_TAPE_LOCK(ctlr, flags); | |
427 | ||
428 | /* find any devices in ccissscsi[] that are not in | |
429 | sd[] and remove them from ccissscsi[] */ | |
430 | ||
431 | i = 0; | |
432 | while(i<ccissscsi[ctlr].ndevices) { | |
433 | csd = &ccissscsi[ctlr].dev[i]; | |
434 | found=0; | |
435 | for (j=0;j<nsds;j++) { | |
436 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, | |
437 | csd->scsi3addr)) { | |
438 | if (sd[j].devtype == csd->devtype) | |
439 | found=2; | |
440 | else | |
441 | found=1; | |
442 | break; | |
443 | } | |
444 | } | |
445 | ||
446 | if (found == 0) { /* device no longer present. */ | |
447 | changes++; | |
448 | /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", | |
449 | ctlr, DEVICETYPE(csd->devtype), hostno, | |
450 | csd->bus, csd->target, csd->lun); */ | |
451 | cciss_scsi_remove_entry(ctlr, hostno, i); | |
452 | /* note, i not incremented */ | |
453 | } | |
454 | else if (found == 1) { /* device is different kind */ | |
455 | changes++; | |
456 | printk("cciss%d: device c%db%dt%dl%d type changed " | |
457 | "(device type now %s).\n", | |
458 | ctlr, hostno, csd->bus, csd->target, csd->lun, | |
459 | DEVICETYPE(csd->devtype)); | |
460 | csd->devtype = sd[j].devtype; | |
461 | i++; /* so just move along. */ | |
462 | } else /* device is same as it ever was, */ | |
463 | i++; /* so just move along. */ | |
464 | } | |
465 | ||
466 | /* Now, make sure every device listed in sd[] is also | |
467 | listed in ccissscsi[], adding them if they aren't found */ | |
468 | ||
469 | for (i=0;i<nsds;i++) { | |
470 | found=0; | |
471 | for (j=0;j<ccissscsi[ctlr].ndevices;j++) { | |
472 | csd = &ccissscsi[ctlr].dev[j]; | |
473 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, | |
474 | csd->scsi3addr)) { | |
475 | if (sd[i].devtype == csd->devtype) | |
476 | found=2; /* found device */ | |
477 | else | |
478 | found=1; /* found a bug. */ | |
479 | break; | |
480 | } | |
481 | } | |
482 | if (!found) { | |
483 | changes++; | |
484 | if (cciss_scsi_add_entry(ctlr, hostno, | |
485 | &sd[i].scsi3addr[0], sd[i].devtype) != 0) | |
486 | break; | |
487 | } else if (found == 1) { | |
488 | /* should never happen... */ | |
489 | changes++; | |
490 | printk("cciss%d: device unexpectedly changed type\n", | |
491 | ctlr); | |
492 | /* but if it does happen, we just ignore that device */ | |
493 | } | |
494 | } | |
495 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
496 | ||
497 | if (!changes) | |
498 | printk("cciss%d: No device changes detected.\n", ctlr); | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | static int | |
504 | lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr) | |
505 | { | |
506 | int i; | |
507 | struct cciss_scsi_dev_t *sd; | |
508 | unsigned long flags; | |
509 | ||
510 | CPQ_TAPE_LOCK(ctlr, flags); | |
511 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) { | |
512 | sd = &ccissscsi[ctlr].dev[i]; | |
513 | if (sd->bus == bus && | |
514 | sd->target == target && | |
515 | sd->lun == lun) { | |
516 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); | |
517 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
518 | return 0; | |
519 | } | |
520 | } | |
521 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
522 | return -1; | |
523 | } | |
524 | ||
525 | static void | |
526 | cciss_scsi_setup(int cntl_num) | |
527 | { | |
528 | struct cciss_scsi_adapter_data_t * shba; | |
529 | ||
530 | ccissscsi[cntl_num].ndevices = 0; | |
531 | shba = (struct cciss_scsi_adapter_data_t *) | |
532 | kmalloc(sizeof(*shba), GFP_KERNEL); | |
533 | if (shba == NULL) | |
534 | return; | |
535 | shba->scsi_host = NULL; | |
536 | spin_lock_init(&shba->lock); | |
537 | shba->registered = 0; | |
538 | if (scsi_cmd_stack_setup(cntl_num, shba) != 0) { | |
539 | kfree(shba); | |
540 | shba = NULL; | |
541 | } | |
542 | hba[cntl_num]->scsi_ctlr = (void *) shba; | |
543 | return; | |
544 | } | |
545 | ||
546 | static void | |
547 | complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag) | |
548 | { | |
549 | struct scsi_cmnd *cmd; | |
550 | ctlr_info_t *ctlr; | |
551 | u64bit addr64; | |
552 | ErrorInfo_struct *ei; | |
553 | ||
554 | ei = cp->err_info; | |
555 | ||
556 | /* First, see if it was a message rather than a command */ | |
557 | if (cp->Request.Type.Type == TYPE_MSG) { | |
558 | cp->cmd_type = CMD_MSG_DONE; | |
559 | return; | |
560 | } | |
561 | ||
562 | cmd = (struct scsi_cmnd *) cp->scsi_cmd; | |
563 | ctlr = hba[cp->ctlr]; | |
564 | ||
565 | /* undo the DMA mappings */ | |
566 | ||
567 | if (cmd->use_sg) { | |
568 | pci_unmap_sg(ctlr->pdev, | |
569 | cmd->buffer, cmd->use_sg, | |
570 | cmd->sc_data_direction); | |
571 | } | |
572 | else if (cmd->request_bufflen) { | |
573 | addr64.val32.lower = cp->SG[0].Addr.lower; | |
574 | addr64.val32.upper = cp->SG[0].Addr.upper; | |
575 | pci_unmap_single(ctlr->pdev, (dma_addr_t) addr64.val, | |
576 | cmd->request_bufflen, | |
577 | cmd->sc_data_direction); | |
578 | } | |
579 | ||
580 | cmd->result = (DID_OK << 16); /* host byte */ | |
581 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ | |
582 | /* cmd->result |= (GOOD < 1); */ /* status byte */ | |
583 | ||
584 | cmd->result |= (ei->ScsiStatus); | |
585 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ | |
586 | ||
587 | /* copy the sense data whether we need to or not. */ | |
588 | ||
589 | memcpy(cmd->sense_buffer, ei->SenseInfo, | |
590 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? | |
591 | SCSI_SENSE_BUFFERSIZE : | |
592 | ei->SenseLen); | |
593 | cmd->resid = ei->ResidualCnt; | |
594 | ||
595 | if(ei->CommandStatus != 0) | |
596 | { /* an error has occurred */ | |
597 | switch(ei->CommandStatus) | |
598 | { | |
599 | case CMD_TARGET_STATUS: | |
600 | /* Pass it up to the upper layers... */ | |
601 | if( ei->ScsiStatus) | |
602 | { | |
603 | #if 0 | |
604 | printk(KERN_WARNING "cciss: cmd %p " | |
605 | "has SCSI Status = %x\n", | |
606 | cp, | |
607 | ei->ScsiStatus); | |
608 | #endif | |
609 | cmd->result |= (ei->ScsiStatus < 1); | |
610 | } | |
611 | else { /* scsi status is zero??? How??? */ | |
612 | ||
613 | /* Ordinarily, this case should never happen, but there is a bug | |
614 | in some released firmware revisions that allows it to happen | |
615 | if, for example, a 4100 backplane loses power and the tape | |
616 | drive is in it. We assume that it's a fatal error of some | |
617 | kind because we can't show that it wasn't. We will make it | |
618 | look like selection timeout since that is the most common | |
619 | reason for this to occur, and it's severe enough. */ | |
620 | ||
621 | cmd->result = DID_NO_CONNECT << 16; | |
622 | } | |
623 | break; | |
624 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
625 | break; | |
626 | case CMD_DATA_OVERRUN: | |
627 | printk(KERN_WARNING "cciss: cp %p has" | |
628 | " completed with data overrun " | |
629 | "reported\n", cp); | |
630 | break; | |
631 | case CMD_INVALID: { | |
632 | /* print_bytes(cp, sizeof(*cp), 1, 0); | |
633 | print_cmd(cp); */ | |
634 | /* We get CMD_INVALID if you address a non-existent tape drive instead | |
635 | of a selection timeout (no response). You will see this if you yank | |
636 | out a tape drive, then try to access it. This is kind of a shame | |
637 | because it means that any other CMD_INVALID (e.g. driver bug) will | |
638 | get interpreted as a missing target. */ | |
639 | cmd->result = DID_NO_CONNECT << 16; | |
640 | } | |
641 | break; | |
642 | case CMD_PROTOCOL_ERR: | |
643 | printk(KERN_WARNING "cciss: cp %p has " | |
644 | "protocol error \n", cp); | |
645 | break; | |
646 | case CMD_HARDWARE_ERR: | |
647 | cmd->result = DID_ERROR << 16; | |
648 | printk(KERN_WARNING "cciss: cp %p had " | |
649 | " hardware error\n", cp); | |
650 | break; | |
651 | case CMD_CONNECTION_LOST: | |
652 | cmd->result = DID_ERROR << 16; | |
653 | printk(KERN_WARNING "cciss: cp %p had " | |
654 | "connection lost\n", cp); | |
655 | break; | |
656 | case CMD_ABORTED: | |
657 | cmd->result = DID_ABORT << 16; | |
658 | printk(KERN_WARNING "cciss: cp %p was " | |
659 | "aborted\n", cp); | |
660 | break; | |
661 | case CMD_ABORT_FAILED: | |
662 | cmd->result = DID_ERROR << 16; | |
663 | printk(KERN_WARNING "cciss: cp %p reports " | |
664 | "abort failed\n", cp); | |
665 | break; | |
666 | case CMD_UNSOLICITED_ABORT: | |
667 | cmd->result = DID_ABORT << 16; | |
668 | printk(KERN_WARNING "cciss: cp %p aborted " | |
669 | "do to an unsolicited abort\n", cp); | |
670 | break; | |
671 | case CMD_TIMEOUT: | |
672 | cmd->result = DID_TIME_OUT << 16; | |
673 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
674 | cp); | |
675 | break; | |
676 | default: | |
677 | cmd->result = DID_ERROR << 16; | |
678 | printk(KERN_WARNING "cciss: cp %p returned " | |
679 | "unknown status %x\n", cp, | |
680 | ei->CommandStatus); | |
681 | } | |
682 | } | |
683 | // printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel, | |
684 | // cmd->target, cmd->lun); | |
685 | cmd->scsi_done(cmd); | |
686 | scsi_cmd_free(ctlr, cp); | |
687 | } | |
688 | ||
689 | static int | |
690 | cciss_scsi_detect(int ctlr) | |
691 | { | |
692 | struct Scsi_Host *sh; | |
693 | int error; | |
694 | ||
695 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); | |
696 | if (sh == NULL) | |
697 | goto fail; | |
698 | sh->io_port = 0; // good enough? FIXME, | |
699 | sh->n_io_port = 0; // I don't think we use these two... | |
700 | sh->this_id = SELF_SCSI_ID; | |
701 | ||
702 | ((struct cciss_scsi_adapter_data_t *) | |
703 | hba[ctlr]->scsi_ctlr)->scsi_host = (void *) sh; | |
704 | sh->hostdata[0] = (unsigned long) hba[ctlr]; | |
705 | sh->irq = hba[ctlr]->intr; | |
706 | sh->unique_id = sh->irq; | |
707 | error = scsi_add_host(sh, &hba[ctlr]->pdev->dev); | |
708 | if (error) | |
709 | goto fail_host_put; | |
710 | scsi_scan_host(sh); | |
711 | return 1; | |
712 | ||
713 | fail_host_put: | |
714 | scsi_host_put(sh); | |
715 | fail: | |
716 | return 0; | |
717 | } | |
718 | ||
719 | static void | |
720 | cciss_unmap_one(struct pci_dev *pdev, | |
721 | CommandList_struct *cp, | |
722 | size_t buflen, | |
723 | int data_direction) | |
724 | { | |
725 | u64bit addr64; | |
726 | ||
727 | addr64.val32.lower = cp->SG[0].Addr.lower; | |
728 | addr64.val32.upper = cp->SG[0].Addr.upper; | |
729 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); | |
730 | } | |
731 | ||
732 | static void | |
733 | cciss_map_one(struct pci_dev *pdev, | |
734 | CommandList_struct *cp, | |
735 | unsigned char *buf, | |
736 | size_t buflen, | |
737 | int data_direction) | |
738 | { | |
739 | __u64 addr64; | |
740 | ||
741 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); | |
742 | cp->SG[0].Addr.lower = | |
743 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
744 | cp->SG[0].Addr.upper = | |
745 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
746 | cp->SG[0].Len = buflen; | |
747 | cp->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ | |
748 | cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ | |
749 | } | |
750 | ||
751 | static int | |
752 | cciss_scsi_do_simple_cmd(ctlr_info_t *c, | |
753 | CommandList_struct *cp, | |
754 | unsigned char *scsi3addr, | |
755 | unsigned char *cdb, | |
756 | unsigned char cdblen, | |
757 | unsigned char *buf, int bufsize, | |
758 | int direction) | |
759 | { | |
760 | unsigned long flags; | |
761 | DECLARE_COMPLETION(wait); | |
762 | ||
763 | cp->cmd_type = CMD_IOCTL_PEND; // treat this like an ioctl | |
764 | cp->scsi_cmd = NULL; | |
765 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
766 | memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN)); | |
767 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
768 | // Fill in the request block... | |
769 | ||
770 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", | |
771 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], | |
772 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ | |
773 | ||
774 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
775 | memcpy(cp->Request.CDB, cdb, cdblen); | |
776 | cp->Request.Timeout = 0; | |
777 | cp->Request.CDBLen = cdblen; | |
778 | cp->Request.Type.Type = TYPE_CMD; | |
779 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
780 | cp->Request.Type.Direction = direction; | |
781 | ||
782 | /* Fill in the SG list and do dma mapping */ | |
783 | cciss_map_one(c->pdev, cp, (unsigned char *) buf, | |
784 | bufsize, DMA_FROM_DEVICE); | |
785 | ||
786 | cp->waiting = &wait; | |
787 | ||
788 | /* Put the request on the tail of the request queue */ | |
789 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
790 | addQ(&c->reqQ, cp); | |
791 | c->Qdepth++; | |
792 | start_io(c); | |
793 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
794 | ||
795 | wait_for_completion(&wait); | |
796 | ||
797 | /* undo the dma mapping */ | |
798 | cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE); | |
799 | return(0); | |
800 | } | |
801 | ||
802 | static void | |
803 | cciss_scsi_interpret_error(CommandList_struct *cp) | |
804 | { | |
805 | ErrorInfo_struct *ei; | |
806 | ||
807 | ei = cp->err_info; | |
808 | switch(ei->CommandStatus) | |
809 | { | |
810 | case CMD_TARGET_STATUS: | |
811 | printk(KERN_WARNING "cciss: cmd %p has " | |
812 | "completed with errors\n", cp); | |
813 | printk(KERN_WARNING "cciss: cmd %p " | |
814 | "has SCSI Status = %x\n", | |
815 | cp, | |
816 | ei->ScsiStatus); | |
817 | if (ei->ScsiStatus == 0) | |
818 | printk(KERN_WARNING | |
819 | "cciss:SCSI status is abnormally zero. " | |
820 | "(probably indicates selection timeout " | |
821 | "reported incorrectly due to a known " | |
822 | "firmware bug, circa July, 2001.)\n"); | |
823 | break; | |
824 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ | |
825 | printk("UNDERRUN\n"); | |
826 | break; | |
827 | case CMD_DATA_OVERRUN: | |
828 | printk(KERN_WARNING "cciss: cp %p has" | |
829 | " completed with data overrun " | |
830 | "reported\n", cp); | |
831 | break; | |
832 | case CMD_INVALID: { | |
833 | /* controller unfortunately reports SCSI passthru's */ | |
834 | /* to non-existent targets as invalid commands. */ | |
835 | printk(KERN_WARNING "cciss: cp %p is " | |
836 | "reported invalid (probably means " | |
837 | "target device no longer present)\n", | |
838 | cp); | |
839 | /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0); | |
840 | print_cmd(cp); */ | |
841 | } | |
842 | break; | |
843 | case CMD_PROTOCOL_ERR: | |
844 | printk(KERN_WARNING "cciss: cp %p has " | |
845 | "protocol error \n", cp); | |
846 | break; | |
847 | case CMD_HARDWARE_ERR: | |
848 | /* cmd->result = DID_ERROR << 16; */ | |
849 | printk(KERN_WARNING "cciss: cp %p had " | |
850 | " hardware error\n", cp); | |
851 | break; | |
852 | case CMD_CONNECTION_LOST: | |
853 | printk(KERN_WARNING "cciss: cp %p had " | |
854 | "connection lost\n", cp); | |
855 | break; | |
856 | case CMD_ABORTED: | |
857 | printk(KERN_WARNING "cciss: cp %p was " | |
858 | "aborted\n", cp); | |
859 | break; | |
860 | case CMD_ABORT_FAILED: | |
861 | printk(KERN_WARNING "cciss: cp %p reports " | |
862 | "abort failed\n", cp); | |
863 | break; | |
864 | case CMD_UNSOLICITED_ABORT: | |
865 | printk(KERN_WARNING "cciss: cp %p aborted " | |
866 | "do to an unsolicited abort\n", cp); | |
867 | break; | |
868 | case CMD_TIMEOUT: | |
869 | printk(KERN_WARNING "cciss: cp %p timedout\n", | |
870 | cp); | |
871 | break; | |
872 | default: | |
873 | printk(KERN_WARNING "cciss: cp %p returned " | |
874 | "unknown status %x\n", cp, | |
875 | ei->CommandStatus); | |
876 | } | |
877 | } | |
878 | ||
879 | static int | |
880 | cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr, | |
881 | InquiryData_struct *buf) | |
882 | { | |
883 | int rc; | |
884 | CommandList_struct *cp; | |
885 | char cdb[6]; | |
886 | ErrorInfo_struct *ei; | |
887 | unsigned long flags; | |
888 | ||
889 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
890 | cp = scsi_cmd_alloc(c); | |
891 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
892 | ||
893 | if (cp == NULL) { /* trouble... */ | |
894 | printk("cmd_alloc returned NULL!\n"); | |
895 | return -1; | |
896 | } | |
897 | ||
898 | ei = cp->err_info; | |
899 | ||
900 | cdb[0] = CISS_INQUIRY; | |
901 | cdb[1] = 0; | |
902 | cdb[2] = 0; | |
903 | cdb[3] = 0; | |
904 | cdb[4] = sizeof(*buf) & 0xff; | |
905 | cdb[5] = 0; | |
906 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb, | |
907 | 6, (unsigned char *) buf, | |
908 | sizeof(*buf), XFER_READ); | |
909 | ||
910 | if (rc != 0) return rc; /* something went wrong */ | |
911 | ||
912 | if (ei->CommandStatus != 0 && | |
913 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
914 | cciss_scsi_interpret_error(cp); | |
915 | rc = -1; | |
916 | } | |
917 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
918 | scsi_cmd_free(c, cp); | |
919 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
920 | return rc; | |
921 | } | |
922 | ||
923 | static int | |
924 | cciss_scsi_do_report_phys_luns(ctlr_info_t *c, | |
925 | ReportLunData_struct *buf, int bufsize) | |
926 | { | |
927 | int rc; | |
928 | CommandList_struct *cp; | |
929 | unsigned char cdb[12]; | |
930 | unsigned char scsi3addr[8]; | |
931 | ErrorInfo_struct *ei; | |
932 | unsigned long flags; | |
933 | ||
934 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
935 | cp = scsi_cmd_alloc(c); | |
936 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
937 | if (cp == NULL) { /* trouble... */ | |
938 | printk("cmd_alloc returned NULL!\n"); | |
939 | return -1; | |
940 | } | |
941 | ||
942 | memset(&scsi3addr[0], 0, 8); /* address the controller */ | |
943 | cdb[0] = CISS_REPORT_PHYS; | |
944 | cdb[1] = 0; | |
945 | cdb[2] = 0; | |
946 | cdb[3] = 0; | |
947 | cdb[4] = 0; | |
948 | cdb[5] = 0; | |
949 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB | |
950 | cdb[7] = (bufsize >> 16) & 0xFF; | |
951 | cdb[8] = (bufsize >> 8) & 0xFF; | |
952 | cdb[9] = bufsize & 0xFF; | |
953 | cdb[10] = 0; | |
954 | cdb[11] = 0; | |
955 | ||
956 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, | |
957 | cdb, 12, | |
958 | (unsigned char *) buf, | |
959 | bufsize, XFER_READ); | |
960 | ||
961 | if (rc != 0) return rc; /* something went wrong */ | |
962 | ||
963 | ei = cp->err_info; | |
964 | if (ei->CommandStatus != 0 && | |
965 | ei->CommandStatus != CMD_DATA_UNDERRUN) { | |
966 | cciss_scsi_interpret_error(cp); | |
967 | rc = -1; | |
968 | } | |
969 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); | |
970 | scsi_cmd_free(c, cp); | |
971 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); | |
972 | return rc; | |
973 | } | |
974 | ||
975 | static void | |
976 | cciss_update_non_disk_devices(int cntl_num, int hostno) | |
977 | { | |
978 | /* the idea here is we could get notified from /proc | |
979 | that some devices have changed, so we do a report | |
980 | physical luns cmd, and adjust our list of devices | |
981 | accordingly. (We can't rely on the scsi-mid layer just | |
982 | doing inquiries, because the "busses" that the scsi | |
983 | mid-layer probes are totally fabricated by this driver, | |
984 | so new devices wouldn't show up. | |
985 | ||
986 | the scsi3addr's of devices won't change so long as the | |
987 | adapter is not reset. That means we can rescan and | |
988 | tell which devices we already know about, vs. new | |
989 | devices, vs. disappearing devices. | |
990 | ||
991 | Also, if you yank out a tape drive, then put in a disk | |
992 | in it's place, (say, a configured volume from another | |
993 | array controller for instance) _don't_ poke this driver | |
994 | (so it thinks it's still a tape, but _do_ poke the scsi | |
995 | mid layer, so it does an inquiry... the scsi mid layer | |
996 | will see the physical disk. This would be bad. Need to | |
997 | think about how to prevent that. One idea would be to | |
998 | snoop all scsi responses and if an inquiry repsonse comes | |
999 | back that reports a disk, chuck it an return selection | |
1000 | timeout instead and adjust our table... Not sure i like | |
1001 | that though. | |
1002 | ||
1003 | */ | |
1004 | ||
1005 | ReportLunData_struct *ld_buff; | |
1006 | InquiryData_struct *inq_buff; | |
1007 | unsigned char scsi3addr[8]; | |
1008 | ctlr_info_t *c; | |
1009 | __u32 num_luns=0; | |
1010 | unsigned char *ch; | |
1011 | /* unsigned char found[CCISS_MAX_SCSI_DEVS_PER_HBA]; */ | |
1012 | struct cciss_scsi_dev_t currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; | |
1013 | int ncurrent=0; | |
1014 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; | |
1015 | int i; | |
1016 | ||
1017 | c = (ctlr_info_t *) hba[cntl_num]; | |
1018 | ld_buff = kmalloc(reportlunsize, GFP_KERNEL); | |
1019 | if (ld_buff == NULL) { | |
1020 | printk(KERN_ERR "cciss: out of memory\n"); | |
1021 | return; | |
1022 | } | |
1023 | memset(ld_buff, 0, reportlunsize); | |
1024 | inq_buff = kmalloc(sizeof( InquiryData_struct), GFP_KERNEL); | |
1025 | if (inq_buff == NULL) { | |
1026 | printk(KERN_ERR "cciss: out of memory\n"); | |
1027 | kfree(ld_buff); | |
1028 | return; | |
1029 | } | |
1030 | ||
1031 | if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) { | |
1032 | ch = &ld_buff->LUNListLength[0]; | |
1033 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; | |
1034 | if (num_luns > CISS_MAX_PHYS_LUN) { | |
1035 | printk(KERN_WARNING | |
1036 | "cciss: Maximum physical LUNs (%d) exceeded. " | |
1037 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, | |
1038 | num_luns - CISS_MAX_PHYS_LUN); | |
1039 | num_luns = CISS_MAX_PHYS_LUN; | |
1040 | } | |
1041 | } | |
1042 | else { | |
1043 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); | |
1044 | goto out; | |
1045 | } | |
1046 | ||
1047 | ||
1048 | /* adjust our table of devices */ | |
1049 | for(i=0; i<num_luns; i++) | |
1050 | { | |
1051 | int devtype; | |
1052 | ||
1053 | /* for each physical lun, do an inquiry */ | |
1054 | if (ld_buff->LUN[i][3] & 0xC0) continue; | |
1055 | memset(inq_buff, 0, sizeof(InquiryData_struct)); | |
1056 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); | |
1057 | ||
1058 | if (cciss_scsi_do_inquiry(hba[cntl_num], | |
1059 | scsi3addr, inq_buff) != 0) | |
1060 | { | |
1061 | /* Inquiry failed (msg printed already) */ | |
1062 | devtype = 0; /* so we will skip this device. */ | |
1063 | } else /* what kind of device is this? */ | |
1064 | devtype = (inq_buff->data_byte[0] & 0x1f); | |
1065 | ||
1066 | switch (devtype) | |
1067 | { | |
1068 | case 0x01: /* sequential access, (tape) */ | |
1069 | case 0x08: /* medium changer */ | |
1070 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { | |
1071 | printk(KERN_INFO "cciss%d: %s ignored, " | |
1072 | "too many devices.\n", cntl_num, | |
1073 | DEVICETYPE(devtype)); | |
1074 | break; | |
1075 | } | |
1076 | memcpy(¤tsd[ncurrent].scsi3addr[0], | |
1077 | &scsi3addr[0], 8); | |
1078 | currentsd[ncurrent].devtype = devtype; | |
1079 | currentsd[ncurrent].bus = -1; | |
1080 | currentsd[ncurrent].target = -1; | |
1081 | currentsd[ncurrent].lun = -1; | |
1082 | ncurrent++; | |
1083 | break; | |
1084 | default: | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent); | |
1090 | out: | |
1091 | kfree(inq_buff); | |
1092 | kfree(ld_buff); | |
1093 | return; | |
1094 | } | |
1095 | ||
1096 | static int | |
1097 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c | |
1098 | { | |
1099 | int verb_len = strlen(verb); | |
1100 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) | |
1101 | return verb_len; | |
1102 | else | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | static int | |
1107 | cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length) | |
1108 | { | |
1109 | int arg_len; | |
1110 | ||
1111 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) | |
1112 | cciss_update_non_disk_devices(ctlr, hostno); | |
1113 | else | |
1114 | return -EINVAL; | |
1115 | return length; | |
1116 | } | |
1117 | ||
1118 | ||
1119 | static int | |
1120 | cciss_scsi_proc_info(struct Scsi_Host *sh, | |
1121 | char *buffer, /* data buffer */ | |
1122 | char **start, /* where data in buffer starts */ | |
1123 | off_t offset, /* offset from start of imaginary file */ | |
1124 | int length, /* length of data in buffer */ | |
1125 | int func) /* 0 == read, 1 == write */ | |
1126 | { | |
1127 | ||
1128 | int buflen, datalen; | |
1129 | ctlr_info_t *ci; | |
1130 | int cntl_num; | |
1131 | ||
1132 | ||
1133 | ci = (ctlr_info_t *) sh->hostdata[0]; | |
1134 | if (ci == NULL) /* This really shouldn't ever happen. */ | |
1135 | return -EINVAL; | |
1136 | ||
1137 | cntl_num = ci->ctlr; /* Get our index into the hba[] array */ | |
1138 | ||
1139 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ | |
1140 | buflen = sprintf(buffer, "hostnum=%d\n", sh->host_no); | |
1141 | ||
1142 | datalen = buflen - offset; | |
1143 | if (datalen < 0) { /* they're reading past EOF. */ | |
1144 | datalen = 0; | |
1145 | *start = buffer+buflen; | |
1146 | } else | |
1147 | *start = buffer + offset; | |
1148 | return(datalen); | |
1149 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ | |
1150 | return cciss_scsi_user_command(cntl_num, sh->host_no, | |
1151 | buffer, length); | |
1152 | } | |
1153 | ||
1154 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci | |
1155 | dma mapping and fills in the scatter gather entries of the | |
1156 | cciss command, cp. */ | |
1157 | ||
1158 | static void | |
1159 | cciss_scatter_gather(struct pci_dev *pdev, | |
1160 | CommandList_struct *cp, | |
1161 | struct scsi_cmnd *cmd) | |
1162 | { | |
1163 | unsigned int use_sg, nsegs=0, len; | |
1164 | struct scatterlist *scatter = (struct scatterlist *) cmd->buffer; | |
1165 | __u64 addr64; | |
1166 | ||
1167 | /* is it just one virtual address? */ | |
1168 | if (!cmd->use_sg) { | |
1169 | if (cmd->request_bufflen) { /* anything to xfer? */ | |
1170 | ||
1171 | addr64 = (__u64) pci_map_single(pdev, | |
1172 | cmd->request_buffer, | |
1173 | cmd->request_bufflen, | |
1174 | cmd->sc_data_direction); | |
1175 | ||
1176 | cp->SG[0].Addr.lower = | |
1177 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
1178 | cp->SG[0].Addr.upper = | |
1179 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
1180 | cp->SG[0].Len = cmd->request_bufflen; | |
1181 | nsegs=1; | |
1182 | } | |
1183 | } /* else, must be a list of virtual addresses.... */ | |
1184 | else if (cmd->use_sg <= MAXSGENTRIES) { /* not too many addrs? */ | |
1185 | ||
1186 | use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, | |
1187 | cmd->sc_data_direction); | |
1188 | ||
1189 | for (nsegs=0; nsegs < use_sg; nsegs++) { | |
1190 | addr64 = (__u64) sg_dma_address(&scatter[nsegs]); | |
1191 | len = sg_dma_len(&scatter[nsegs]); | |
1192 | cp->SG[nsegs].Addr.lower = | |
1193 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); | |
1194 | cp->SG[nsegs].Addr.upper = | |
1195 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); | |
1196 | cp->SG[nsegs].Len = len; | |
1197 | cp->SG[nsegs].Ext = 0; // we are not chaining | |
1198 | } | |
1199 | } else BUG(); | |
1200 | ||
1201 | cp->Header.SGList = (__u8) nsegs; /* no. SGs contig in this cmd */ | |
1202 | cp->Header.SGTotal = (__u16) nsegs; /* total sgs in this cmd list */ | |
1203 | return; | |
1204 | } | |
1205 | ||
1206 | ||
1207 | static int | |
1208 | cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) | |
1209 | { | |
1210 | ctlr_info_t **c; | |
1211 | int ctlr, rc; | |
1212 | unsigned char scsi3addr[8]; | |
1213 | CommandList_struct *cp; | |
1214 | unsigned long flags; | |
1215 | ||
1216 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. | |
1217 | // We violate cmd->host privacy here. (Is there another way?) | |
1218 | c = (ctlr_info_t **) &cmd->device->host->hostdata[0]; | |
1219 | ctlr = (*c)->ctlr; | |
1220 | ||
1221 | rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id, | |
1222 | cmd->device->lun, scsi3addr); | |
1223 | if (rc != 0) { | |
1224 | /* the scsi nexus does not match any that we presented... */ | |
1225 | /* pretend to mid layer that we got selection timeout */ | |
1226 | cmd->result = DID_NO_CONNECT << 16; | |
1227 | done(cmd); | |
1228 | /* we might want to think about registering controller itself | |
1229 | as a processor device on the bus so sg binds to it. */ | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | /* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n", | |
1234 | cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/ | |
1235 | // printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel, | |
1236 | // cmd->target, cmd->lun); | |
1237 | ||
1238 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and | |
1239 | see what the device thinks of it. */ | |
1240 | ||
1241 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1242 | cp = scsi_cmd_alloc(*c); | |
1243 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1244 | if (cp == NULL) { /* trouble... */ | |
1245 | printk("scsi_cmd_alloc returned NULL!\n"); | |
1246 | /* FIXME: next 3 lines are -> BAD! <- */ | |
1247 | cmd->result = DID_NO_CONNECT << 16; | |
1248 | done(cmd); | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | // Fill in the command list header | |
1253 | ||
1254 | cmd->scsi_done = done; // save this for use by completion code | |
1255 | ||
1256 | // save cp in case we have to abort it | |
1257 | cmd->host_scribble = (unsigned char *) cp; | |
1258 | ||
1259 | cp->cmd_type = CMD_SCSI; | |
1260 | cp->scsi_cmd = cmd; | |
1261 | cp->Header.ReplyQueue = 0; // unused in simple mode | |
1262 | memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); | |
1263 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag | |
1264 | ||
1265 | // Fill in the request block... | |
1266 | ||
1267 | cp->Request.Timeout = 0; | |
1268 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); | |
1269 | if (cmd->cmd_len > sizeof(cp->Request.CDB)) BUG(); | |
1270 | cp->Request.CDBLen = cmd->cmd_len; | |
1271 | memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len); | |
1272 | cp->Request.Type.Type = TYPE_CMD; | |
1273 | cp->Request.Type.Attribute = ATTR_SIMPLE; | |
1274 | switch(cmd->sc_data_direction) | |
1275 | { | |
1276 | case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break; | |
1277 | case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break; | |
1278 | case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break; | |
1279 | case DMA_BIDIRECTIONAL: | |
1280 | // This can happen if a buggy application does a scsi passthru | |
1281 | // and sets both inlen and outlen to non-zero. ( see | |
1282 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) | |
1283 | ||
1284 | cp->Request.Type.Direction = XFER_RSVD; | |
1285 | // This is technically wrong, and cciss controllers should | |
1286 | // reject it with CMD_INVALID, which is the most correct | |
1287 | // response, but non-fibre backends appear to let it | |
1288 | // slide by, and give the same results as if this field | |
1289 | // were set correctly. Either way is acceptable for | |
1290 | // our purposes here. | |
1291 | ||
1292 | break; | |
1293 | ||
1294 | default: | |
1295 | printk("cciss: unknown data direction: %d\n", | |
1296 | cmd->sc_data_direction); | |
1297 | BUG(); | |
1298 | break; | |
1299 | } | |
1300 | ||
1301 | cciss_scatter_gather((*c)->pdev, cp, cmd); // Fill the SG list | |
1302 | ||
1303 | /* Put the request on the tail of the request queue */ | |
1304 | ||
1305 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1306 | addQ(&(*c)->reqQ, cp); | |
1307 | (*c)->Qdepth++; | |
1308 | start_io(*c); | |
1309 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1310 | ||
1311 | /* the cmd'll come back via intr handler in complete_scsi_command() */ | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | static void | |
1316 | cciss_unregister_scsi(int ctlr) | |
1317 | { | |
1318 | struct cciss_scsi_adapter_data_t *sa; | |
1319 | struct cciss_scsi_cmd_stack_t *stk; | |
1320 | unsigned long flags; | |
1321 | ||
1322 | /* we are being forcibly unloaded, and may not refuse. */ | |
1323 | ||
1324 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1325 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
1326 | stk = &sa->cmd_stack; | |
1327 | ||
1328 | /* if we weren't ever actually registered, don't unregister */ | |
1329 | if (sa->registered) { | |
1330 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1331 | scsi_remove_host(sa->scsi_host); | |
1332 | scsi_host_put(sa->scsi_host); | |
1333 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1334 | } | |
1335 | ||
1336 | /* set scsi_host to NULL so our detect routine will | |
1337 | find us on register */ | |
1338 | sa->scsi_host = NULL; | |
1339 | scsi_cmd_stack_free(ctlr); | |
1340 | kfree(sa); | |
1341 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1342 | } | |
1343 | ||
1344 | static int | |
1345 | cciss_register_scsi(int ctlr) | |
1346 | { | |
1347 | unsigned long flags; | |
1348 | ||
1349 | CPQ_TAPE_LOCK(ctlr, flags); | |
1350 | ||
1351 | /* Since this is really a block driver, the SCSI core may not be | |
1352 | initialized at init time, in which case, calling scsi_register_host | |
1353 | would hang. Instead, we do it later, via /proc filesystem | |
1354 | and rc scripts, when we know SCSI core is good to go. */ | |
1355 | ||
1356 | /* Only register if SCSI devices are detected. */ | |
1357 | if (ccissscsi[ctlr].ndevices != 0) { | |
1358 | ((struct cciss_scsi_adapter_data_t *) | |
1359 | hba[ctlr]->scsi_ctlr)->registered = 1; | |
1360 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1361 | return cciss_scsi_detect(ctlr); | |
1362 | } | |
1363 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1364 | printk(KERN_INFO | |
1365 | "cciss%d: No appropriate SCSI device detected, " | |
1366 | "SCSI subsystem not engaged.\n", ctlr); | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | static int | |
1371 | cciss_engage_scsi(int ctlr) | |
1372 | { | |
1373 | struct cciss_scsi_adapter_data_t *sa; | |
1374 | struct cciss_scsi_cmd_stack_t *stk; | |
1375 | unsigned long flags; | |
1376 | ||
1377 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); | |
1378 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; | |
1379 | stk = &sa->cmd_stack; | |
1380 | ||
1381 | if (((struct cciss_scsi_adapter_data_t *) | |
1382 | hba[ctlr]->scsi_ctlr)->registered) { | |
1383 | printk("cciss%d: SCSI subsystem already engaged.\n", ctlr); | |
1384 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1385 | return ENXIO; | |
1386 | } | |
1387 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); | |
1388 | cciss_update_non_disk_devices(ctlr, -1); | |
1389 | cciss_register_scsi(ctlr); | |
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | static void | |
1394 | cciss_proc_tape_report(int ctlr, unsigned char *buffer, off_t *pos, off_t *len) | |
1395 | { | |
1396 | unsigned long flags; | |
1397 | int size; | |
1398 | ||
1399 | *pos = *pos -1; *len = *len - 1; // cut off the last trailing newline | |
1400 | ||
1401 | CPQ_TAPE_LOCK(ctlr, flags); | |
1402 | size = sprintf(buffer + *len, | |
1403 | " Sequential access devices: %d\n\n", | |
1404 | ccissscsi[ctlr].ndevices); | |
1405 | CPQ_TAPE_UNLOCK(ctlr, flags); | |
1406 | *pos += size; *len += size; | |
1407 | } | |
1408 | ||
1409 | #else /* no CONFIG_CISS_SCSI_TAPE */ | |
1410 | ||
1411 | /* If no tape support, then these become defined out of existence */ | |
1412 | ||
1413 | #define cciss_scsi_setup(cntl_num) | |
1414 | #define cciss_unregister_scsi(ctlr) | |
1415 | #define cciss_register_scsi(ctlr) | |
1416 | #define cciss_proc_tape_report(ctlr, buffer, pos, len) | |
1417 | ||
1418 | #endif /* CONFIG_CISS_SCSI_TAPE */ |