Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <scsi/scsi.h> |
| 39 | #include <scsi/scsi_cmnd.h> |
| 40 | #include <scsi/scsi_device.h> |
| 41 | #include <scsi/scsi_host.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | #include "cciss_scsi.h" |
| 44 | |
mike.miller@hp.com | 3da8b71 | 2005-11-04 12:30:37 -0600 | [diff] [blame] | 45 | #define CCISS_ABORT_MSG 0x00 |
| 46 | #define CCISS_RESET_MSG 0x01 |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | /* some prototypes... */ |
| 49 | static int sendcmd( |
| 50 | __u8 cmd, |
| 51 | int ctlr, |
| 52 | void *buff, |
| 53 | size_t size, |
| 54 | unsigned int use_unit_num, /* 0: address the controller, |
| 55 | 1: address logical volume log_unit, |
| 56 | 2: address is in scsi3addr */ |
| 57 | unsigned int log_unit, |
| 58 | __u8 page_code, |
| 59 | unsigned char *scsi3addr, |
| 60 | int cmd_type); |
| 61 | |
| 62 | |
| 63 | static int cciss_scsi_proc_info( |
| 64 | struct Scsi_Host *sh, |
| 65 | char *buffer, /* data buffer */ |
| 66 | char **start, /* where data in buffer starts */ |
| 67 | off_t offset, /* offset from start of imaginary file */ |
| 68 | int length, /* length of data in buffer */ |
| 69 | int func); /* 0 == read, 1 == write */ |
| 70 | |
| 71 | static int cciss_scsi_queue_command (struct scsi_cmnd *cmd, |
| 72 | void (* done)(struct scsi_cmnd *)); |
mike.miller@hp.com | 3da8b71 | 2005-11-04 12:30:37 -0600 | [diff] [blame] | 73 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *); |
| 74 | static int cciss_eh_abort_handler(struct scsi_cmnd *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
| 76 | static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { |
| 77 | { .name = "cciss0", .ndevices = 0 }, |
| 78 | { .name = "cciss1", .ndevices = 0 }, |
| 79 | { .name = "cciss2", .ndevices = 0 }, |
| 80 | { .name = "cciss3", .ndevices = 0 }, |
| 81 | { .name = "cciss4", .ndevices = 0 }, |
| 82 | { .name = "cciss5", .ndevices = 0 }, |
| 83 | { .name = "cciss6", .ndevices = 0 }, |
| 84 | { .name = "cciss7", .ndevices = 0 }, |
| 85 | }; |
| 86 | |
| 87 | static struct scsi_host_template cciss_driver_template = { |
| 88 | .module = THIS_MODULE, |
| 89 | .name = "cciss", |
| 90 | .proc_name = "cciss", |
| 91 | .proc_info = cciss_scsi_proc_info, |
| 92 | .queuecommand = cciss_scsi_queue_command, |
| 93 | .can_queue = SCSI_CCISS_CAN_QUEUE, |
| 94 | .this_id = 7, |
| 95 | .sg_tablesize = MAXSGENTRIES, |
| 96 | .cmd_per_lun = 1, |
| 97 | .use_clustering = DISABLE_CLUSTERING, |
mike.miller@hp.com | 3da8b71 | 2005-11-04 12:30:37 -0600 | [diff] [blame] | 98 | /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ |
| 99 | .eh_device_reset_handler= cciss_eh_device_reset_handler, |
| 100 | .eh_abort_handler = cciss_eh_abort_handler, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | }; |
| 102 | |
| 103 | #pragma pack(1) |
| 104 | struct cciss_scsi_cmd_stack_elem_t { |
| 105 | CommandList_struct cmd; |
| 106 | ErrorInfo_struct Err; |
| 107 | __u32 busaddr; |
Mike Miller | 33079b2 | 2005-09-13 01:25:22 -0700 | [diff] [blame] | 108 | __u32 pad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | }; |
| 110 | |
| 111 | #pragma pack() |
| 112 | |
| 113 | #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \ |
| 114 | CCISS_MAX_SCSI_DEVS_PER_HBA + 2) |
| 115 | // plus two for init time usage |
| 116 | |
| 117 | #pragma pack(1) |
| 118 | struct cciss_scsi_cmd_stack_t { |
| 119 | struct cciss_scsi_cmd_stack_elem_t *pool; |
| 120 | struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE]; |
| 121 | dma_addr_t cmd_pool_handle; |
| 122 | int top; |
| 123 | }; |
| 124 | #pragma pack() |
| 125 | |
| 126 | struct cciss_scsi_adapter_data_t { |
| 127 | struct Scsi_Host *scsi_host; |
| 128 | struct cciss_scsi_cmd_stack_t cmd_stack; |
| 129 | int registered; |
| 130 | spinlock_t lock; // to protect ccissscsi[ctlr]; |
| 131 | }; |
| 132 | |
| 133 | #define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \ |
| 134 | &(((struct cciss_scsi_adapter_data_t *) \ |
| 135 | hba[ctlr]->scsi_ctlr)->lock), flags); |
| 136 | #define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \ |
| 137 | &(((struct cciss_scsi_adapter_data_t *) \ |
| 138 | hba[ctlr]->scsi_ctlr)->lock), flags); |
| 139 | |
| 140 | static CommandList_struct * |
| 141 | scsi_cmd_alloc(ctlr_info_t *h) |
| 142 | { |
| 143 | /* assume only one process in here at a time, locking done by caller. */ |
| 144 | /* use CCISS_LOCK(ctlr) */ |
| 145 | /* might be better to rewrite how we allocate scsi commands in a way that */ |
| 146 | /* needs no locking at all. */ |
| 147 | |
| 148 | /* take the top memory chunk off the stack and return it, if any. */ |
| 149 | struct cciss_scsi_cmd_stack_elem_t *c; |
| 150 | struct cciss_scsi_adapter_data_t *sa; |
| 151 | struct cciss_scsi_cmd_stack_t *stk; |
| 152 | u64bit temp64; |
| 153 | |
| 154 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; |
| 155 | stk = &sa->cmd_stack; |
| 156 | |
| 157 | if (stk->top < 0) |
| 158 | return NULL; |
| 159 | c = stk->elem[stk->top]; |
| 160 | /* memset(c, 0, sizeof(*c)); */ |
| 161 | memset(&c->cmd, 0, sizeof(c->cmd)); |
| 162 | memset(&c->Err, 0, sizeof(c->Err)); |
| 163 | /* set physical addr of cmd and addr of scsi parameters */ |
| 164 | c->cmd.busaddr = c->busaddr; |
| 165 | /* (__u32) (stk->cmd_pool_handle + |
| 166 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ |
| 167 | |
| 168 | temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); |
| 169 | /* (__u64) (stk->cmd_pool_handle + |
| 170 | (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + |
| 171 | sizeof(CommandList_struct)); */ |
| 172 | stk->top--; |
| 173 | c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; |
| 174 | c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; |
| 175 | c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); |
| 176 | |
| 177 | c->cmd.ctlr = h->ctlr; |
| 178 | c->cmd.err_info = &c->Err; |
| 179 | |
| 180 | return (CommandList_struct *) c; |
| 181 | } |
| 182 | |
| 183 | static void |
| 184 | scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd) |
| 185 | { |
| 186 | /* assume only one process in here at a time, locking done by caller. */ |
| 187 | /* use CCISS_LOCK(ctlr) */ |
| 188 | /* drop the free memory chunk on top of the stack. */ |
| 189 | |
| 190 | struct cciss_scsi_adapter_data_t *sa; |
| 191 | struct cciss_scsi_cmd_stack_t *stk; |
| 192 | |
| 193 | sa = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr; |
| 194 | stk = &sa->cmd_stack; |
| 195 | if (stk->top >= CMD_STACK_SIZE) { |
| 196 | printk("cciss: scsi_cmd_free called too many times.\n"); |
| 197 | BUG(); |
| 198 | } |
| 199 | stk->top++; |
| 200 | stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd; |
| 201 | } |
| 202 | |
| 203 | static int |
| 204 | scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa) |
| 205 | { |
| 206 | int i; |
| 207 | struct cciss_scsi_cmd_stack_t *stk; |
| 208 | size_t size; |
| 209 | |
| 210 | stk = &sa->cmd_stack; |
| 211 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; |
| 212 | |
| 213 | // pci_alloc_consistent guarantees 32-bit DMA address will |
| 214 | // be used |
| 215 | |
| 216 | stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) |
| 217 | pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle); |
| 218 | |
| 219 | if (stk->pool == NULL) { |
| 220 | printk("stk->pool is null\n"); |
| 221 | return -1; |
| 222 | } |
| 223 | |
| 224 | for (i=0; i<CMD_STACK_SIZE; i++) { |
| 225 | stk->elem[i] = &stk->pool[i]; |
| 226 | stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + |
| 227 | (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); |
| 228 | } |
| 229 | stk->top = CMD_STACK_SIZE-1; |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | static void |
| 234 | scsi_cmd_stack_free(int ctlr) |
| 235 | { |
| 236 | struct cciss_scsi_adapter_data_t *sa; |
| 237 | struct cciss_scsi_cmd_stack_t *stk; |
| 238 | size_t size; |
| 239 | |
| 240 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; |
| 241 | stk = &sa->cmd_stack; |
| 242 | if (stk->top != CMD_STACK_SIZE-1) { |
| 243 | printk( "cciss: %d scsi commands are still outstanding.\n", |
| 244 | CMD_STACK_SIZE - stk->top); |
| 245 | // BUG(); |
| 246 | printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk); |
| 247 | } |
| 248 | size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; |
| 249 | |
| 250 | pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle); |
| 251 | stk->pool = NULL; |
| 252 | } |
| 253 | |
Grant Coady | 400bb23 | 2005-11-15 00:09:20 -0800 | [diff] [blame] | 254 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | static int xmargin=8; |
| 256 | static int amargin=60; |
| 257 | |
| 258 | static void |
| 259 | print_bytes (unsigned char *c, int len, int hex, int ascii) |
| 260 | { |
| 261 | |
| 262 | int i; |
| 263 | unsigned char *x; |
| 264 | |
| 265 | if (hex) |
| 266 | { |
| 267 | x = c; |
| 268 | for (i=0;i<len;i++) |
| 269 | { |
| 270 | if ((i % xmargin) == 0 && i>0) printk("\n"); |
| 271 | if ((i % xmargin) == 0) printk("0x%04x:", i); |
| 272 | printk(" %02x", *x); |
| 273 | x++; |
| 274 | } |
| 275 | printk("\n"); |
| 276 | } |
| 277 | if (ascii) |
| 278 | { |
| 279 | x = c; |
| 280 | for (i=0;i<len;i++) |
| 281 | { |
| 282 | if ((i % amargin) == 0 && i>0) printk("\n"); |
| 283 | if ((i % amargin) == 0) printk("0x%04x:", i); |
| 284 | if (*x > 26 && *x < 128) printk("%c", *x); |
| 285 | else printk("."); |
| 286 | x++; |
| 287 | } |
| 288 | printk("\n"); |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | static void |
| 293 | print_cmd(CommandList_struct *cp) |
| 294 | { |
| 295 | printk("queue:%d\n", cp->Header.ReplyQueue); |
| 296 | printk("sglist:%d\n", cp->Header.SGList); |
| 297 | printk("sgtot:%d\n", cp->Header.SGTotal); |
| 298 | printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, |
| 299 | cp->Header.Tag.lower); |
| 300 | printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", |
| 301 | cp->Header.LUN.LunAddrBytes[0], |
| 302 | cp->Header.LUN.LunAddrBytes[1], |
| 303 | cp->Header.LUN.LunAddrBytes[2], |
| 304 | cp->Header.LUN.LunAddrBytes[3], |
| 305 | cp->Header.LUN.LunAddrBytes[4], |
| 306 | cp->Header.LUN.LunAddrBytes[5], |
| 307 | cp->Header.LUN.LunAddrBytes[6], |
| 308 | cp->Header.LUN.LunAddrBytes[7]); |
| 309 | printk("CDBLen:%d\n", cp->Request.CDBLen); |
| 310 | printk("Type:%d\n",cp->Request.Type.Type); |
| 311 | printk("Attr:%d\n",cp->Request.Type.Attribute); |
| 312 | printk(" Dir:%d\n",cp->Request.Type.Direction); |
| 313 | printk("Timeout:%d\n",cp->Request.Timeout); |
| 314 | printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" |
| 315 | " %02x %02x %02x %02x %02x %02x %02x %02x\n", |
| 316 | cp->Request.CDB[0], cp->Request.CDB[1], |
| 317 | cp->Request.CDB[2], cp->Request.CDB[3], |
| 318 | cp->Request.CDB[4], cp->Request.CDB[5], |
| 319 | cp->Request.CDB[6], cp->Request.CDB[7], |
| 320 | cp->Request.CDB[8], cp->Request.CDB[9], |
| 321 | cp->Request.CDB[10], cp->Request.CDB[11], |
| 322 | cp->Request.CDB[12], cp->Request.CDB[13], |
| 323 | cp->Request.CDB[14], cp->Request.CDB[15]), |
| 324 | printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", |
| 325 | cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, |
| 326 | cp->ErrDesc.Len); |
| 327 | printk("sgs..........Errorinfo:\n"); |
| 328 | printk("scsistatus:%d\n", cp->err_info->ScsiStatus); |
| 329 | printk("senselen:%d\n", cp->err_info->SenseLen); |
| 330 | printk("cmd status:%d\n", cp->err_info->CommandStatus); |
| 331 | printk("resid cnt:%d\n", cp->err_info->ResidualCnt); |
| 332 | printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); |
| 333 | printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); |
| 334 | printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); |
| 335 | |
| 336 | } |
| 337 | |
| 338 | #endif |
| 339 | |
| 340 | static int |
| 341 | find_bus_target_lun(int ctlr, int *bus, int *target, int *lun) |
| 342 | { |
| 343 | /* finds an unused bus, target, lun for a new device */ |
| 344 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ |
| 345 | int i, found=0; |
| 346 | unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
| 347 | |
| 348 | memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); |
| 349 | |
| 350 | target_taken[SELF_SCSI_ID] = 1; |
| 351 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) |
| 352 | target_taken[ccissscsi[ctlr].dev[i].target] = 1; |
| 353 | |
| 354 | for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) { |
| 355 | if (!target_taken[i]) { |
| 356 | *bus = 0; *target=i; *lun = 0; found=1; |
| 357 | break; |
| 358 | } |
| 359 | } |
| 360 | return (!found); |
| 361 | } |
| 362 | |
| 363 | static int |
| 364 | cciss_scsi_add_entry(int ctlr, int hostno, |
| 365 | unsigned char *scsi3addr, int devtype) |
| 366 | { |
| 367 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ |
| 368 | int n = ccissscsi[ctlr].ndevices; |
| 369 | struct cciss_scsi_dev_t *sd; |
| 370 | |
| 371 | if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { |
| 372 | printk("cciss%d: Too many devices, " |
| 373 | "some will be inaccessible.\n", ctlr); |
| 374 | return -1; |
| 375 | } |
| 376 | sd = &ccissscsi[ctlr].dev[n]; |
| 377 | if (find_bus_target_lun(ctlr, &sd->bus, &sd->target, &sd->lun) != 0) |
| 378 | return -1; |
| 379 | memcpy(&sd->scsi3addr[0], scsi3addr, 8); |
| 380 | sd->devtype = devtype; |
| 381 | ccissscsi[ctlr].ndevices++; |
| 382 | |
| 383 | /* initially, (before registering with scsi layer) we don't |
| 384 | know our hostno and we don't want to print anything first |
| 385 | time anyway (the scsi layer's inquiries will show that info) */ |
| 386 | if (hostno != -1) |
| 387 | printk("cciss%d: %s device c%db%dt%dl%d added.\n", |
Matthew Wilcox | 4ff3671 | 2006-07-04 12:15:20 -0600 | [diff] [blame] | 388 | ctlr, scsi_device_type(sd->devtype), hostno, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | sd->bus, sd->target, sd->lun); |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static void |
| 394 | cciss_scsi_remove_entry(int ctlr, int hostno, int entry) |
| 395 | { |
| 396 | /* assumes hba[ctlr]->scsi_ctlr->lock is held */ |
| 397 | int i; |
| 398 | struct cciss_scsi_dev_t sd; |
| 399 | |
| 400 | if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; |
| 401 | sd = ccissscsi[ctlr].dev[entry]; |
| 402 | for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++) |
| 403 | ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1]; |
| 404 | ccissscsi[ctlr].ndevices--; |
| 405 | printk("cciss%d: %s device c%db%dt%dl%d removed.\n", |
Matthew Wilcox | 4ff3671 | 2006-07-04 12:15:20 -0600 | [diff] [blame] | 406 | ctlr, scsi_device_type(sd.devtype), hostno, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | sd.bus, sd.target, sd.lun); |
| 408 | } |
| 409 | |
| 410 | |
| 411 | #define SCSI3ADDR_EQ(a,b) ( \ |
| 412 | (a)[7] == (b)[7] && \ |
| 413 | (a)[6] == (b)[6] && \ |
| 414 | (a)[5] == (b)[5] && \ |
| 415 | (a)[4] == (b)[4] && \ |
| 416 | (a)[3] == (b)[3] && \ |
| 417 | (a)[2] == (b)[2] && \ |
| 418 | (a)[1] == (b)[1] && \ |
| 419 | (a)[0] == (b)[0]) |
| 420 | |
| 421 | static int |
| 422 | adjust_cciss_scsi_table(int ctlr, int hostno, |
| 423 | struct cciss_scsi_dev_t sd[], int nsds) |
| 424 | { |
| 425 | /* sd contains scsi3 addresses and devtypes, but |
| 426 | bus target and lun are not filled in. This funciton |
| 427 | takes what's in sd to be the current and adjusts |
| 428 | ccissscsi[] to be in line with what's in sd. */ |
| 429 | |
| 430 | int i,j, found, changes=0; |
| 431 | struct cciss_scsi_dev_t *csd; |
| 432 | unsigned long flags; |
| 433 | |
| 434 | CPQ_TAPE_LOCK(ctlr, flags); |
| 435 | |
| 436 | /* find any devices in ccissscsi[] that are not in |
| 437 | sd[] and remove them from ccissscsi[] */ |
| 438 | |
| 439 | i = 0; |
| 440 | while(i<ccissscsi[ctlr].ndevices) { |
| 441 | csd = &ccissscsi[ctlr].dev[i]; |
| 442 | found=0; |
| 443 | for (j=0;j<nsds;j++) { |
| 444 | if (SCSI3ADDR_EQ(sd[j].scsi3addr, |
| 445 | csd->scsi3addr)) { |
| 446 | if (sd[j].devtype == csd->devtype) |
| 447 | found=2; |
| 448 | else |
| 449 | found=1; |
| 450 | break; |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | if (found == 0) { /* device no longer present. */ |
| 455 | changes++; |
| 456 | /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", |
Matthew Wilcox | 4ff3671 | 2006-07-04 12:15:20 -0600 | [diff] [blame] | 457 | ctlr, scsi_device_type(csd->devtype), hostno, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | csd->bus, csd->target, csd->lun); */ |
| 459 | cciss_scsi_remove_entry(ctlr, hostno, i); |
| 460 | /* note, i not incremented */ |
| 461 | } |
| 462 | else if (found == 1) { /* device is different kind */ |
| 463 | changes++; |
| 464 | printk("cciss%d: device c%db%dt%dl%d type changed " |
| 465 | "(device type now %s).\n", |
| 466 | ctlr, hostno, csd->bus, csd->target, csd->lun, |
Matthew Wilcox | 4ff3671 | 2006-07-04 12:15:20 -0600 | [diff] [blame] | 467 | scsi_device_type(csd->devtype)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | csd->devtype = sd[j].devtype; |
| 469 | i++; /* so just move along. */ |
| 470 | } else /* device is same as it ever was, */ |
| 471 | i++; /* so just move along. */ |
| 472 | } |
| 473 | |
| 474 | /* Now, make sure every device listed in sd[] is also |
| 475 | listed in ccissscsi[], adding them if they aren't found */ |
| 476 | |
| 477 | for (i=0;i<nsds;i++) { |
| 478 | found=0; |
| 479 | for (j=0;j<ccissscsi[ctlr].ndevices;j++) { |
| 480 | csd = &ccissscsi[ctlr].dev[j]; |
| 481 | if (SCSI3ADDR_EQ(sd[i].scsi3addr, |
| 482 | csd->scsi3addr)) { |
| 483 | if (sd[i].devtype == csd->devtype) |
| 484 | found=2; /* found device */ |
| 485 | else |
| 486 | found=1; /* found a bug. */ |
| 487 | break; |
| 488 | } |
| 489 | } |
| 490 | if (!found) { |
| 491 | changes++; |
| 492 | if (cciss_scsi_add_entry(ctlr, hostno, |
| 493 | &sd[i].scsi3addr[0], sd[i].devtype) != 0) |
| 494 | break; |
| 495 | } else if (found == 1) { |
| 496 | /* should never happen... */ |
| 497 | changes++; |
| 498 | printk("cciss%d: device unexpectedly changed type\n", |
| 499 | ctlr); |
| 500 | /* but if it does happen, we just ignore that device */ |
| 501 | } |
| 502 | } |
| 503 | CPQ_TAPE_UNLOCK(ctlr, flags); |
| 504 | |
| 505 | if (!changes) |
| 506 | printk("cciss%d: No device changes detected.\n", ctlr); |
| 507 | |
| 508 | return 0; |
| 509 | } |
| 510 | |
| 511 | static int |
| 512 | lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr) |
| 513 | { |
| 514 | int i; |
| 515 | struct cciss_scsi_dev_t *sd; |
| 516 | unsigned long flags; |
| 517 | |
| 518 | CPQ_TAPE_LOCK(ctlr, flags); |
| 519 | for (i=0;i<ccissscsi[ctlr].ndevices;i++) { |
| 520 | sd = &ccissscsi[ctlr].dev[i]; |
| 521 | if (sd->bus == bus && |
| 522 | sd->target == target && |
| 523 | sd->lun == lun) { |
| 524 | memcpy(scsi3addr, &sd->scsi3addr[0], 8); |
| 525 | CPQ_TAPE_UNLOCK(ctlr, flags); |
| 526 | return 0; |
| 527 | } |
| 528 | } |
| 529 | CPQ_TAPE_UNLOCK(ctlr, flags); |
| 530 | return -1; |
| 531 | } |
| 532 | |
| 533 | static void |
| 534 | cciss_scsi_setup(int cntl_num) |
| 535 | { |
| 536 | struct cciss_scsi_adapter_data_t * shba; |
| 537 | |
| 538 | ccissscsi[cntl_num].ndevices = 0; |
| 539 | shba = (struct cciss_scsi_adapter_data_t *) |
| 540 | kmalloc(sizeof(*shba), GFP_KERNEL); |
| 541 | if (shba == NULL) |
| 542 | return; |
| 543 | shba->scsi_host = NULL; |
| 544 | spin_lock_init(&shba->lock); |
| 545 | shba->registered = 0; |
| 546 | if (scsi_cmd_stack_setup(cntl_num, shba) != 0) { |
| 547 | kfree(shba); |
| 548 | shba = NULL; |
| 549 | } |
| 550 | hba[cntl_num]->scsi_ctlr = (void *) shba; |
| 551 | return; |
| 552 | } |
| 553 | |
| 554 | static void |
| 555 | complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag) |
| 556 | { |
| 557 | struct scsi_cmnd *cmd; |
| 558 | ctlr_info_t *ctlr; |
| 559 | u64bit addr64; |
| 560 | ErrorInfo_struct *ei; |
| 561 | |
| 562 | ei = cp->err_info; |
| 563 | |
| 564 | /* First, see if it was a message rather than a command */ |
| 565 | if (cp->Request.Type.Type == TYPE_MSG) { |
| 566 | cp->cmd_type = CMD_MSG_DONE; |
| 567 | return; |
| 568 | } |
| 569 | |
| 570 | cmd = (struct scsi_cmnd *) cp->scsi_cmd; |
| 571 | ctlr = hba[cp->ctlr]; |
| 572 | |
| 573 | /* undo the DMA mappings */ |
| 574 | |
| 575 | if (cmd->use_sg) { |
| 576 | pci_unmap_sg(ctlr->pdev, |
Christoph Hellwig | 5d5ff44 | 2006-06-03 13:21:13 +0200 | [diff] [blame] | 577 | cmd->request_buffer, cmd->use_sg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | cmd->sc_data_direction); |
| 579 | } |
| 580 | else if (cmd->request_bufflen) { |
| 581 | addr64.val32.lower = cp->SG[0].Addr.lower; |
| 582 | addr64.val32.upper = cp->SG[0].Addr.upper; |
| 583 | pci_unmap_single(ctlr->pdev, (dma_addr_t) addr64.val, |
| 584 | cmd->request_bufflen, |
| 585 | cmd->sc_data_direction); |
| 586 | } |
| 587 | |
| 588 | cmd->result = (DID_OK << 16); /* host byte */ |
| 589 | cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ |
| 590 | /* cmd->result |= (GOOD < 1); */ /* status byte */ |
| 591 | |
| 592 | cmd->result |= (ei->ScsiStatus); |
| 593 | /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ |
| 594 | |
| 595 | /* copy the sense data whether we need to or not. */ |
| 596 | |
| 597 | memcpy(cmd->sense_buffer, ei->SenseInfo, |
| 598 | ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? |
| 599 | SCSI_SENSE_BUFFERSIZE : |
| 600 | ei->SenseLen); |
| 601 | cmd->resid = ei->ResidualCnt; |
| 602 | |
| 603 | if(ei->CommandStatus != 0) |
| 604 | { /* an error has occurred */ |
| 605 | switch(ei->CommandStatus) |
| 606 | { |
| 607 | case CMD_TARGET_STATUS: |
| 608 | /* Pass it up to the upper layers... */ |
| 609 | if( ei->ScsiStatus) |
| 610 | { |
| 611 | #if 0 |
| 612 | printk(KERN_WARNING "cciss: cmd %p " |
| 613 | "has SCSI Status = %x\n", |
| 614 | cp, |
| 615 | ei->ScsiStatus); |
| 616 | #endif |
| 617 | cmd->result |= (ei->ScsiStatus < 1); |
| 618 | } |
| 619 | else { /* scsi status is zero??? How??? */ |
| 620 | |
| 621 | /* Ordinarily, this case should never happen, but there is a bug |
| 622 | in some released firmware revisions that allows it to happen |
| 623 | if, for example, a 4100 backplane loses power and the tape |
| 624 | drive is in it. We assume that it's a fatal error of some |
| 625 | kind because we can't show that it wasn't. We will make it |
| 626 | look like selection timeout since that is the most common |
| 627 | reason for this to occur, and it's severe enough. */ |
| 628 | |
| 629 | cmd->result = DID_NO_CONNECT << 16; |
| 630 | } |
| 631 | break; |
| 632 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ |
| 633 | break; |
| 634 | case CMD_DATA_OVERRUN: |
| 635 | printk(KERN_WARNING "cciss: cp %p has" |
| 636 | " completed with data overrun " |
| 637 | "reported\n", cp); |
| 638 | break; |
| 639 | case CMD_INVALID: { |
| 640 | /* print_bytes(cp, sizeof(*cp), 1, 0); |
| 641 | print_cmd(cp); */ |
| 642 | /* We get CMD_INVALID if you address a non-existent tape drive instead |
| 643 | of a selection timeout (no response). You will see this if you yank |
| 644 | out a tape drive, then try to access it. This is kind of a shame |
| 645 | because it means that any other CMD_INVALID (e.g. driver bug) will |
| 646 | get interpreted as a missing target. */ |
| 647 | cmd->result = DID_NO_CONNECT << 16; |
| 648 | } |
| 649 | break; |
| 650 | case CMD_PROTOCOL_ERR: |
| 651 | printk(KERN_WARNING "cciss: cp %p has " |
| 652 | "protocol error \n", cp); |
| 653 | break; |
| 654 | case CMD_HARDWARE_ERR: |
| 655 | cmd->result = DID_ERROR << 16; |
| 656 | printk(KERN_WARNING "cciss: cp %p had " |
| 657 | " hardware error\n", cp); |
| 658 | break; |
| 659 | case CMD_CONNECTION_LOST: |
| 660 | cmd->result = DID_ERROR << 16; |
| 661 | printk(KERN_WARNING "cciss: cp %p had " |
| 662 | "connection lost\n", cp); |
| 663 | break; |
| 664 | case CMD_ABORTED: |
| 665 | cmd->result = DID_ABORT << 16; |
| 666 | printk(KERN_WARNING "cciss: cp %p was " |
| 667 | "aborted\n", cp); |
| 668 | break; |
| 669 | case CMD_ABORT_FAILED: |
| 670 | cmd->result = DID_ERROR << 16; |
| 671 | printk(KERN_WARNING "cciss: cp %p reports " |
| 672 | "abort failed\n", cp); |
| 673 | break; |
| 674 | case CMD_UNSOLICITED_ABORT: |
| 675 | cmd->result = DID_ABORT << 16; |
| 676 | printk(KERN_WARNING "cciss: cp %p aborted " |
| 677 | "do to an unsolicited abort\n", cp); |
| 678 | break; |
| 679 | case CMD_TIMEOUT: |
| 680 | cmd->result = DID_TIME_OUT << 16; |
| 681 | printk(KERN_WARNING "cciss: cp %p timedout\n", |
| 682 | cp); |
| 683 | break; |
| 684 | default: |
| 685 | cmd->result = DID_ERROR << 16; |
| 686 | printk(KERN_WARNING "cciss: cp %p returned " |
| 687 | "unknown status %x\n", cp, |
| 688 | ei->CommandStatus); |
| 689 | } |
| 690 | } |
| 691 | // printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel, |
| 692 | // cmd->target, cmd->lun); |
| 693 | cmd->scsi_done(cmd); |
| 694 | scsi_cmd_free(ctlr, cp); |
| 695 | } |
| 696 | |
| 697 | static int |
| 698 | cciss_scsi_detect(int ctlr) |
| 699 | { |
| 700 | struct Scsi_Host *sh; |
| 701 | int error; |
| 702 | |
| 703 | sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); |
| 704 | if (sh == NULL) |
| 705 | goto fail; |
| 706 | sh->io_port = 0; // good enough? FIXME, |
| 707 | sh->n_io_port = 0; // I don't think we use these two... |
| 708 | sh->this_id = SELF_SCSI_ID; |
| 709 | |
| 710 | ((struct cciss_scsi_adapter_data_t *) |
| 711 | hba[ctlr]->scsi_ctlr)->scsi_host = (void *) sh; |
| 712 | sh->hostdata[0] = (unsigned long) hba[ctlr]; |
Mike Miller | fb86a35 | 2006-01-08 01:03:50 -0800 | [diff] [blame] | 713 | sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | sh->unique_id = sh->irq; |
| 715 | error = scsi_add_host(sh, &hba[ctlr]->pdev->dev); |
| 716 | if (error) |
| 717 | goto fail_host_put; |
| 718 | scsi_scan_host(sh); |
| 719 | return 1; |
| 720 | |
| 721 | fail_host_put: |
| 722 | scsi_host_put(sh); |
| 723 | fail: |
| 724 | return 0; |
| 725 | } |
| 726 | |
| 727 | static void |
| 728 | cciss_unmap_one(struct pci_dev *pdev, |
| 729 | CommandList_struct *cp, |
| 730 | size_t buflen, |
| 731 | int data_direction) |
| 732 | { |
| 733 | u64bit addr64; |
| 734 | |
| 735 | addr64.val32.lower = cp->SG[0].Addr.lower; |
| 736 | addr64.val32.upper = cp->SG[0].Addr.upper; |
| 737 | pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); |
| 738 | } |
| 739 | |
| 740 | static void |
| 741 | cciss_map_one(struct pci_dev *pdev, |
| 742 | CommandList_struct *cp, |
| 743 | unsigned char *buf, |
| 744 | size_t buflen, |
| 745 | int data_direction) |
| 746 | { |
| 747 | __u64 addr64; |
| 748 | |
| 749 | addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); |
| 750 | cp->SG[0].Addr.lower = |
| 751 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); |
| 752 | cp->SG[0].Addr.upper = |
| 753 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); |
| 754 | cp->SG[0].Len = buflen; |
| 755 | cp->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ |
| 756 | cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ |
| 757 | } |
| 758 | |
| 759 | static int |
| 760 | cciss_scsi_do_simple_cmd(ctlr_info_t *c, |
| 761 | CommandList_struct *cp, |
| 762 | unsigned char *scsi3addr, |
| 763 | unsigned char *cdb, |
| 764 | unsigned char cdblen, |
| 765 | unsigned char *buf, int bufsize, |
| 766 | int direction) |
| 767 | { |
| 768 | unsigned long flags; |
Peter Zijlstra | 6e9a473 | 2006-09-30 23:28:10 -0700 | [diff] [blame^] | 769 | DECLARE_COMPLETION_ONSTACK(wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | cp->cmd_type = CMD_IOCTL_PEND; // treat this like an ioctl |
| 772 | cp->scsi_cmd = NULL; |
| 773 | cp->Header.ReplyQueue = 0; // unused in simple mode |
| 774 | memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN)); |
| 775 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag |
| 776 | // Fill in the request block... |
| 777 | |
| 778 | /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", |
| 779 | scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], |
| 780 | scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ |
| 781 | |
| 782 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); |
| 783 | memcpy(cp->Request.CDB, cdb, cdblen); |
| 784 | cp->Request.Timeout = 0; |
| 785 | cp->Request.CDBLen = cdblen; |
| 786 | cp->Request.Type.Type = TYPE_CMD; |
| 787 | cp->Request.Type.Attribute = ATTR_SIMPLE; |
| 788 | cp->Request.Type.Direction = direction; |
| 789 | |
| 790 | /* Fill in the SG list and do dma mapping */ |
| 791 | cciss_map_one(c->pdev, cp, (unsigned char *) buf, |
| 792 | bufsize, DMA_FROM_DEVICE); |
| 793 | |
| 794 | cp->waiting = &wait; |
| 795 | |
| 796 | /* Put the request on the tail of the request queue */ |
| 797 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); |
| 798 | addQ(&c->reqQ, cp); |
| 799 | c->Qdepth++; |
| 800 | start_io(c); |
| 801 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); |
| 802 | |
| 803 | wait_for_completion(&wait); |
| 804 | |
| 805 | /* undo the dma mapping */ |
| 806 | cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE); |
| 807 | return(0); |
| 808 | } |
| 809 | |
| 810 | static void |
| 811 | cciss_scsi_interpret_error(CommandList_struct *cp) |
| 812 | { |
| 813 | ErrorInfo_struct *ei; |
| 814 | |
| 815 | ei = cp->err_info; |
| 816 | switch(ei->CommandStatus) |
| 817 | { |
| 818 | case CMD_TARGET_STATUS: |
| 819 | printk(KERN_WARNING "cciss: cmd %p has " |
| 820 | "completed with errors\n", cp); |
| 821 | printk(KERN_WARNING "cciss: cmd %p " |
| 822 | "has SCSI Status = %x\n", |
| 823 | cp, |
| 824 | ei->ScsiStatus); |
| 825 | if (ei->ScsiStatus == 0) |
| 826 | printk(KERN_WARNING |
| 827 | "cciss:SCSI status is abnormally zero. " |
| 828 | "(probably indicates selection timeout " |
| 829 | "reported incorrectly due to a known " |
| 830 | "firmware bug, circa July, 2001.)\n"); |
| 831 | break; |
| 832 | case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ |
| 833 | printk("UNDERRUN\n"); |
| 834 | break; |
| 835 | case CMD_DATA_OVERRUN: |
| 836 | printk(KERN_WARNING "cciss: cp %p has" |
| 837 | " completed with data overrun " |
| 838 | "reported\n", cp); |
| 839 | break; |
| 840 | case CMD_INVALID: { |
| 841 | /* controller unfortunately reports SCSI passthru's */ |
| 842 | /* to non-existent targets as invalid commands. */ |
| 843 | printk(KERN_WARNING "cciss: cp %p is " |
| 844 | "reported invalid (probably means " |
| 845 | "target device no longer present)\n", |
| 846 | cp); |
| 847 | /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0); |
| 848 | print_cmd(cp); */ |
| 849 | } |
| 850 | break; |
| 851 | case CMD_PROTOCOL_ERR: |
| 852 | printk(KERN_WARNING "cciss: cp %p has " |
| 853 | "protocol error \n", cp); |
| 854 | break; |
| 855 | case CMD_HARDWARE_ERR: |
| 856 | /* cmd->result = DID_ERROR << 16; */ |
| 857 | printk(KERN_WARNING "cciss: cp %p had " |
| 858 | " hardware error\n", cp); |
| 859 | break; |
| 860 | case CMD_CONNECTION_LOST: |
| 861 | printk(KERN_WARNING "cciss: cp %p had " |
| 862 | "connection lost\n", cp); |
| 863 | break; |
| 864 | case CMD_ABORTED: |
| 865 | printk(KERN_WARNING "cciss: cp %p was " |
| 866 | "aborted\n", cp); |
| 867 | break; |
| 868 | case CMD_ABORT_FAILED: |
| 869 | printk(KERN_WARNING "cciss: cp %p reports " |
| 870 | "abort failed\n", cp); |
| 871 | break; |
| 872 | case CMD_UNSOLICITED_ABORT: |
| 873 | printk(KERN_WARNING "cciss: cp %p aborted " |
| 874 | "do to an unsolicited abort\n", cp); |
| 875 | break; |
| 876 | case CMD_TIMEOUT: |
| 877 | printk(KERN_WARNING "cciss: cp %p timedout\n", |
| 878 | cp); |
| 879 | break; |
| 880 | default: |
| 881 | printk(KERN_WARNING "cciss: cp %p returned " |
| 882 | "unknown status %x\n", cp, |
| 883 | ei->CommandStatus); |
| 884 | } |
| 885 | } |
| 886 | |
| 887 | static int |
| 888 | cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr, |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 889 | unsigned char *buf, unsigned char bufsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | { |
| 891 | int rc; |
| 892 | CommandList_struct *cp; |
| 893 | char cdb[6]; |
| 894 | ErrorInfo_struct *ei; |
| 895 | unsigned long flags; |
| 896 | |
| 897 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); |
| 898 | cp = scsi_cmd_alloc(c); |
| 899 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); |
| 900 | |
| 901 | if (cp == NULL) { /* trouble... */ |
| 902 | printk("cmd_alloc returned NULL!\n"); |
| 903 | return -1; |
| 904 | } |
| 905 | |
| 906 | ei = cp->err_info; |
| 907 | |
| 908 | cdb[0] = CISS_INQUIRY; |
| 909 | cdb[1] = 0; |
| 910 | cdb[2] = 0; |
| 911 | cdb[3] = 0; |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 912 | cdb[4] = bufsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | cdb[5] = 0; |
| 914 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb, |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 915 | 6, buf, bufsize, XFER_READ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
| 917 | if (rc != 0) return rc; /* something went wrong */ |
| 918 | |
| 919 | if (ei->CommandStatus != 0 && |
| 920 | ei->CommandStatus != CMD_DATA_UNDERRUN) { |
| 921 | cciss_scsi_interpret_error(cp); |
| 922 | rc = -1; |
| 923 | } |
| 924 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); |
| 925 | scsi_cmd_free(c, cp); |
| 926 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); |
| 927 | return rc; |
| 928 | } |
| 929 | |
| 930 | static int |
| 931 | cciss_scsi_do_report_phys_luns(ctlr_info_t *c, |
| 932 | ReportLunData_struct *buf, int bufsize) |
| 933 | { |
| 934 | int rc; |
| 935 | CommandList_struct *cp; |
| 936 | unsigned char cdb[12]; |
| 937 | unsigned char scsi3addr[8]; |
| 938 | ErrorInfo_struct *ei; |
| 939 | unsigned long flags; |
| 940 | |
| 941 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); |
| 942 | cp = scsi_cmd_alloc(c); |
| 943 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); |
| 944 | if (cp == NULL) { /* trouble... */ |
| 945 | printk("cmd_alloc returned NULL!\n"); |
| 946 | return -1; |
| 947 | } |
| 948 | |
| 949 | memset(&scsi3addr[0], 0, 8); /* address the controller */ |
| 950 | cdb[0] = CISS_REPORT_PHYS; |
| 951 | cdb[1] = 0; |
| 952 | cdb[2] = 0; |
| 953 | cdb[3] = 0; |
| 954 | cdb[4] = 0; |
| 955 | cdb[5] = 0; |
| 956 | cdb[6] = (bufsize >> 24) & 0xFF; //MSB |
| 957 | cdb[7] = (bufsize >> 16) & 0xFF; |
| 958 | cdb[8] = (bufsize >> 8) & 0xFF; |
| 959 | cdb[9] = bufsize & 0xFF; |
| 960 | cdb[10] = 0; |
| 961 | cdb[11] = 0; |
| 962 | |
| 963 | rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, |
| 964 | cdb, 12, |
| 965 | (unsigned char *) buf, |
| 966 | bufsize, XFER_READ); |
| 967 | |
| 968 | if (rc != 0) return rc; /* something went wrong */ |
| 969 | |
| 970 | ei = cp->err_info; |
| 971 | if (ei->CommandStatus != 0 && |
| 972 | ei->CommandStatus != CMD_DATA_UNDERRUN) { |
| 973 | cciss_scsi_interpret_error(cp); |
| 974 | rc = -1; |
| 975 | } |
| 976 | spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags); |
| 977 | scsi_cmd_free(c, cp); |
| 978 | spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags); |
| 979 | return rc; |
| 980 | } |
| 981 | |
| 982 | static void |
| 983 | cciss_update_non_disk_devices(int cntl_num, int hostno) |
| 984 | { |
| 985 | /* the idea here is we could get notified from /proc |
| 986 | that some devices have changed, so we do a report |
| 987 | physical luns cmd, and adjust our list of devices |
| 988 | accordingly. (We can't rely on the scsi-mid layer just |
| 989 | doing inquiries, because the "busses" that the scsi |
| 990 | mid-layer probes are totally fabricated by this driver, |
| 991 | so new devices wouldn't show up. |
| 992 | |
| 993 | the scsi3addr's of devices won't change so long as the |
| 994 | adapter is not reset. That means we can rescan and |
| 995 | tell which devices we already know about, vs. new |
| 996 | devices, vs. disappearing devices. |
| 997 | |
| 998 | Also, if you yank out a tape drive, then put in a disk |
| 999 | in it's place, (say, a configured volume from another |
| 1000 | array controller for instance) _don't_ poke this driver |
| 1001 | (so it thinks it's still a tape, but _do_ poke the scsi |
| 1002 | mid layer, so it does an inquiry... the scsi mid layer |
| 1003 | will see the physical disk. This would be bad. Need to |
| 1004 | think about how to prevent that. One idea would be to |
| 1005 | snoop all scsi responses and if an inquiry repsonse comes |
| 1006 | back that reports a disk, chuck it an return selection |
| 1007 | timeout instead and adjust our table... Not sure i like |
| 1008 | that though. |
| 1009 | |
| 1010 | */ |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 1011 | #define OBDR_TAPE_INQ_SIZE 49 |
| 1012 | #define OBDR_TAPE_SIG "$DR-10" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | ReportLunData_struct *ld_buff; |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 1014 | unsigned char *inq_buff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | unsigned char scsi3addr[8]; |
| 1016 | ctlr_info_t *c; |
| 1017 | __u32 num_luns=0; |
| 1018 | unsigned char *ch; |
| 1019 | /* unsigned char found[CCISS_MAX_SCSI_DEVS_PER_HBA]; */ |
| 1020 | struct cciss_scsi_dev_t currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; |
| 1021 | int ncurrent=0; |
| 1022 | int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; |
| 1023 | int i; |
| 1024 | |
| 1025 | c = (ctlr_info_t *) hba[cntl_num]; |
Eric Sesterhenn | 06ff37f | 2006-03-08 11:21:52 +0100 | [diff] [blame] | 1026 | ld_buff = kzalloc(reportlunsize, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | if (ld_buff == NULL) { |
| 1028 | printk(KERN_ERR "cciss: out of memory\n"); |
| 1029 | return; |
| 1030 | } |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 1031 | inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | if (inq_buff == NULL) { |
| 1033 | printk(KERN_ERR "cciss: out of memory\n"); |
| 1034 | kfree(ld_buff); |
| 1035 | return; |
| 1036 | } |
| 1037 | |
| 1038 | if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) { |
| 1039 | ch = &ld_buff->LUNListLength[0]; |
| 1040 | num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; |
| 1041 | if (num_luns > CISS_MAX_PHYS_LUN) { |
| 1042 | printk(KERN_WARNING |
| 1043 | "cciss: Maximum physical LUNs (%d) exceeded. " |
| 1044 | "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, |
| 1045 | num_luns - CISS_MAX_PHYS_LUN); |
| 1046 | num_luns = CISS_MAX_PHYS_LUN; |
| 1047 | } |
| 1048 | } |
| 1049 | else { |
| 1050 | printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); |
| 1051 | goto out; |
| 1052 | } |
| 1053 | |
| 1054 | |
| 1055 | /* adjust our table of devices */ |
| 1056 | for(i=0; i<num_luns; i++) |
| 1057 | { |
| 1058 | int devtype; |
| 1059 | |
| 1060 | /* for each physical lun, do an inquiry */ |
| 1061 | if (ld_buff->LUN[i][3] & 0xC0) continue; |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 1062 | memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); |
| 1064 | |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 1065 | if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, inq_buff, |
| 1066 | (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | /* Inquiry failed (msg printed already) */ |
| 1068 | devtype = 0; /* so we will skip this device. */ |
| 1069 | } else /* what kind of device is this? */ |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 1070 | devtype = (inq_buff[0] & 0x1f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
| 1072 | switch (devtype) |
| 1073 | { |
Mike Miller | 47922d0 | 2005-09-13 01:25:25 -0700 | [diff] [blame] | 1074 | case 0x05: /* CD-ROM */ { |
| 1075 | |
| 1076 | /* We don't *really* support actual CD-ROM devices, |
| 1077 | * just this "One Button Disaster Recovery" tape drive |
| 1078 | * which temporarily pretends to be a CD-ROM drive. |
| 1079 | * So we check that the device is really an OBDR tape |
| 1080 | * device by checking for "$DR-10" in bytes 43-48 of |
| 1081 | * the inquiry data. |
| 1082 | */ |
| 1083 | char obdr_sig[7]; |
| 1084 | |
| 1085 | strncpy(obdr_sig, &inq_buff[43], 6); |
| 1086 | obdr_sig[6] = '\0'; |
| 1087 | if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) |
| 1088 | /* Not OBDR device, ignore it. */ |
| 1089 | break; |
| 1090 | } |
| 1091 | /* fall through . . . */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | case 0x01: /* sequential access, (tape) */ |
| 1093 | case 0x08: /* medium changer */ |
| 1094 | if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { |
| 1095 | printk(KERN_INFO "cciss%d: %s ignored, " |
| 1096 | "too many devices.\n", cntl_num, |
Matthew Wilcox | 4ff3671 | 2006-07-04 12:15:20 -0600 | [diff] [blame] | 1097 | scsi_device_type(devtype)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | break; |
| 1099 | } |
| 1100 | memcpy(¤tsd[ncurrent].scsi3addr[0], |
| 1101 | &scsi3addr[0], 8); |
| 1102 | currentsd[ncurrent].devtype = devtype; |
| 1103 | currentsd[ncurrent].bus = -1; |
| 1104 | currentsd[ncurrent].target = -1; |
| 1105 | currentsd[ncurrent].lun = -1; |
| 1106 | ncurrent++; |
| 1107 | break; |
| 1108 | default: |
| 1109 | break; |
| 1110 | } |
| 1111 | } |
| 1112 | |
| 1113 | adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent); |
| 1114 | out: |
| 1115 | kfree(inq_buff); |
| 1116 | kfree(ld_buff); |
| 1117 | return; |
| 1118 | } |
| 1119 | |
| 1120 | static int |
| 1121 | is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c |
| 1122 | { |
| 1123 | int verb_len = strlen(verb); |
| 1124 | if (len >= verb_len && !memcmp(verb,ptr,verb_len)) |
| 1125 | return verb_len; |
| 1126 | else |
| 1127 | return 0; |
| 1128 | } |
| 1129 | |
| 1130 | static int |
| 1131 | cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length) |
| 1132 | { |
| 1133 | int arg_len; |
| 1134 | |
| 1135 | if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) |
| 1136 | cciss_update_non_disk_devices(ctlr, hostno); |
| 1137 | else |
| 1138 | return -EINVAL; |
| 1139 | return length; |
| 1140 | } |
| 1141 | |
| 1142 | |
| 1143 | static int |
| 1144 | cciss_scsi_proc_info(struct Scsi_Host *sh, |
| 1145 | char *buffer, /* data buffer */ |
| 1146 | char **start, /* where data in buffer starts */ |
| 1147 | off_t offset, /* offset from start of imaginary file */ |
| 1148 | int length, /* length of data in buffer */ |
| 1149 | int func) /* 0 == read, 1 == write */ |
| 1150 | { |
| 1151 | |
| 1152 | int buflen, datalen; |
| 1153 | ctlr_info_t *ci; |
Mike Miller | b9f0bd0 | 2005-09-13 01:25:26 -0700 | [diff] [blame] | 1154 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | int cntl_num; |
| 1156 | |
| 1157 | |
| 1158 | ci = (ctlr_info_t *) sh->hostdata[0]; |
| 1159 | if (ci == NULL) /* This really shouldn't ever happen. */ |
| 1160 | return -EINVAL; |
| 1161 | |
| 1162 | cntl_num = ci->ctlr; /* Get our index into the hba[] array */ |
| 1163 | |
| 1164 | if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ |
Mike Miller | b9f0bd0 | 2005-09-13 01:25:26 -0700 | [diff] [blame] | 1165 | buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", |
| 1166 | cntl_num, sh->host_no); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | |
Mike Miller | b9f0bd0 | 2005-09-13 01:25:26 -0700 | [diff] [blame] | 1168 | /* this information is needed by apps to know which cciss |
| 1169 | device corresponds to which scsi host number without |
| 1170 | having to open a scsi target device node. The device |
| 1171 | information is not a duplicate of /proc/scsi/scsi because |
| 1172 | the two may be out of sync due to scsi hotplug, rather |
| 1173 | this info is for an app to be able to use to know how to |
| 1174 | get them back in sync. */ |
| 1175 | |
| 1176 | for (i=0;i<ccissscsi[cntl_num].ndevices;i++) { |
| 1177 | struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i]; |
| 1178 | buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " |
| 1179 | "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", |
| 1180 | sh->host_no, sd->bus, sd->target, sd->lun, |
| 1181 | sd->devtype, |
| 1182 | sd->scsi3addr[0], sd->scsi3addr[1], |
| 1183 | sd->scsi3addr[2], sd->scsi3addr[3], |
| 1184 | sd->scsi3addr[4], sd->scsi3addr[5], |
| 1185 | sd->scsi3addr[6], sd->scsi3addr[7]); |
| 1186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | datalen = buflen - offset; |
| 1188 | if (datalen < 0) { /* they're reading past EOF. */ |
| 1189 | datalen = 0; |
| 1190 | *start = buffer+buflen; |
| 1191 | } else |
| 1192 | *start = buffer + offset; |
| 1193 | return(datalen); |
| 1194 | } else /* User is writing to /proc/scsi/cciss*?/?* ... */ |
| 1195 | return cciss_scsi_user_command(cntl_num, sh->host_no, |
| 1196 | buffer, length); |
| 1197 | } |
| 1198 | |
| 1199 | /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci |
| 1200 | dma mapping and fills in the scatter gather entries of the |
| 1201 | cciss command, cp. */ |
| 1202 | |
| 1203 | static void |
| 1204 | cciss_scatter_gather(struct pci_dev *pdev, |
| 1205 | CommandList_struct *cp, |
| 1206 | struct scsi_cmnd *cmd) |
| 1207 | { |
| 1208 | unsigned int use_sg, nsegs=0, len; |
Christoph Hellwig | 5d5ff44 | 2006-06-03 13:21:13 +0200 | [diff] [blame] | 1209 | struct scatterlist *scatter = (struct scatterlist *) cmd->request_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | __u64 addr64; |
| 1211 | |
| 1212 | /* is it just one virtual address? */ |
| 1213 | if (!cmd->use_sg) { |
| 1214 | if (cmd->request_bufflen) { /* anything to xfer? */ |
| 1215 | |
| 1216 | addr64 = (__u64) pci_map_single(pdev, |
| 1217 | cmd->request_buffer, |
| 1218 | cmd->request_bufflen, |
| 1219 | cmd->sc_data_direction); |
| 1220 | |
| 1221 | cp->SG[0].Addr.lower = |
| 1222 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); |
| 1223 | cp->SG[0].Addr.upper = |
| 1224 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); |
| 1225 | cp->SG[0].Len = cmd->request_bufflen; |
| 1226 | nsegs=1; |
| 1227 | } |
| 1228 | } /* else, must be a list of virtual addresses.... */ |
| 1229 | else if (cmd->use_sg <= MAXSGENTRIES) { /* not too many addrs? */ |
| 1230 | |
Christoph Hellwig | 5d5ff44 | 2006-06-03 13:21:13 +0200 | [diff] [blame] | 1231 | use_sg = pci_map_sg(pdev, cmd->request_buffer, cmd->use_sg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | cmd->sc_data_direction); |
| 1233 | |
| 1234 | for (nsegs=0; nsegs < use_sg; nsegs++) { |
| 1235 | addr64 = (__u64) sg_dma_address(&scatter[nsegs]); |
| 1236 | len = sg_dma_len(&scatter[nsegs]); |
| 1237 | cp->SG[nsegs].Addr.lower = |
| 1238 | (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); |
| 1239 | cp->SG[nsegs].Addr.upper = |
| 1240 | (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); |
| 1241 | cp->SG[nsegs].Len = len; |
| 1242 | cp->SG[nsegs].Ext = 0; // we are not chaining |
| 1243 | } |
| 1244 | } else BUG(); |
| 1245 | |
| 1246 | cp->Header.SGList = (__u8) nsegs; /* no. SGs contig in this cmd */ |
| 1247 | cp->Header.SGTotal = (__u16) nsegs; /* total sgs in this cmd list */ |
| 1248 | return; |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | static int |
| 1253 | cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) |
| 1254 | { |
| 1255 | ctlr_info_t **c; |
| 1256 | int ctlr, rc; |
| 1257 | unsigned char scsi3addr[8]; |
| 1258 | CommandList_struct *cp; |
| 1259 | unsigned long flags; |
| 1260 | |
| 1261 | // Get the ptr to our adapter structure (hba[i]) out of cmd->host. |
| 1262 | // We violate cmd->host privacy here. (Is there another way?) |
| 1263 | c = (ctlr_info_t **) &cmd->device->host->hostdata[0]; |
| 1264 | ctlr = (*c)->ctlr; |
| 1265 | |
| 1266 | rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id, |
| 1267 | cmd->device->lun, scsi3addr); |
| 1268 | if (rc != 0) { |
| 1269 | /* the scsi nexus does not match any that we presented... */ |
| 1270 | /* pretend to mid layer that we got selection timeout */ |
| 1271 | cmd->result = DID_NO_CONNECT << 16; |
| 1272 | done(cmd); |
| 1273 | /* we might want to think about registering controller itself |
| 1274 | as a processor device on the bus so sg binds to it. */ |
| 1275 | return 0; |
| 1276 | } |
| 1277 | |
| 1278 | /* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n", |
| 1279 | cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/ |
| 1280 | // printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel, |
| 1281 | // cmd->target, cmd->lun); |
| 1282 | |
| 1283 | /* Ok, we have a reasonable scsi nexus, so send the cmd down, and |
| 1284 | see what the device thinks of it. */ |
| 1285 | |
| 1286 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1287 | cp = scsi_cmd_alloc(*c); |
| 1288 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1289 | if (cp == NULL) { /* trouble... */ |
| 1290 | printk("scsi_cmd_alloc returned NULL!\n"); |
| 1291 | /* FIXME: next 3 lines are -> BAD! <- */ |
| 1292 | cmd->result = DID_NO_CONNECT << 16; |
| 1293 | done(cmd); |
| 1294 | return 0; |
| 1295 | } |
| 1296 | |
| 1297 | // Fill in the command list header |
| 1298 | |
| 1299 | cmd->scsi_done = done; // save this for use by completion code |
| 1300 | |
| 1301 | // save cp in case we have to abort it |
| 1302 | cmd->host_scribble = (unsigned char *) cp; |
| 1303 | |
| 1304 | cp->cmd_type = CMD_SCSI; |
| 1305 | cp->scsi_cmd = cmd; |
| 1306 | cp->Header.ReplyQueue = 0; // unused in simple mode |
| 1307 | memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); |
| 1308 | cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag |
| 1309 | |
| 1310 | // Fill in the request block... |
| 1311 | |
| 1312 | cp->Request.Timeout = 0; |
| 1313 | memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB)); |
Eric Sesterhenn | 089fe1b | 2006-03-24 18:50:27 +0100 | [diff] [blame] | 1314 | BUG_ON(cmd->cmd_len > sizeof(cp->Request.CDB)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | cp->Request.CDBLen = cmd->cmd_len; |
| 1316 | memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len); |
| 1317 | cp->Request.Type.Type = TYPE_CMD; |
| 1318 | cp->Request.Type.Attribute = ATTR_SIMPLE; |
| 1319 | switch(cmd->sc_data_direction) |
| 1320 | { |
| 1321 | case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break; |
| 1322 | case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break; |
| 1323 | case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break; |
| 1324 | case DMA_BIDIRECTIONAL: |
| 1325 | // This can happen if a buggy application does a scsi passthru |
| 1326 | // and sets both inlen and outlen to non-zero. ( see |
| 1327 | // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) |
| 1328 | |
| 1329 | cp->Request.Type.Direction = XFER_RSVD; |
| 1330 | // This is technically wrong, and cciss controllers should |
| 1331 | // reject it with CMD_INVALID, which is the most correct |
| 1332 | // response, but non-fibre backends appear to let it |
| 1333 | // slide by, and give the same results as if this field |
| 1334 | // were set correctly. Either way is acceptable for |
| 1335 | // our purposes here. |
| 1336 | |
| 1337 | break; |
| 1338 | |
| 1339 | default: |
| 1340 | printk("cciss: unknown data direction: %d\n", |
| 1341 | cmd->sc_data_direction); |
| 1342 | BUG(); |
| 1343 | break; |
| 1344 | } |
| 1345 | |
| 1346 | cciss_scatter_gather((*c)->pdev, cp, cmd); // Fill the SG list |
| 1347 | |
| 1348 | /* Put the request on the tail of the request queue */ |
| 1349 | |
| 1350 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1351 | addQ(&(*c)->reqQ, cp); |
| 1352 | (*c)->Qdepth++; |
| 1353 | start_io(*c); |
| 1354 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1355 | |
| 1356 | /* the cmd'll come back via intr handler in complete_scsi_command() */ |
| 1357 | return 0; |
| 1358 | } |
| 1359 | |
| 1360 | static void |
| 1361 | cciss_unregister_scsi(int ctlr) |
| 1362 | { |
| 1363 | struct cciss_scsi_adapter_data_t *sa; |
| 1364 | struct cciss_scsi_cmd_stack_t *stk; |
| 1365 | unsigned long flags; |
| 1366 | |
| 1367 | /* we are being forcibly unloaded, and may not refuse. */ |
| 1368 | |
| 1369 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1370 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; |
| 1371 | stk = &sa->cmd_stack; |
| 1372 | |
| 1373 | /* if we weren't ever actually registered, don't unregister */ |
| 1374 | if (sa->registered) { |
| 1375 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1376 | scsi_remove_host(sa->scsi_host); |
| 1377 | scsi_host_put(sa->scsi_host); |
| 1378 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1379 | } |
| 1380 | |
| 1381 | /* set scsi_host to NULL so our detect routine will |
| 1382 | find us on register */ |
| 1383 | sa->scsi_host = NULL; |
| 1384 | scsi_cmd_stack_free(ctlr); |
| 1385 | kfree(sa); |
| 1386 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1387 | } |
| 1388 | |
| 1389 | static int |
| 1390 | cciss_register_scsi(int ctlr) |
| 1391 | { |
| 1392 | unsigned long flags; |
| 1393 | |
| 1394 | CPQ_TAPE_LOCK(ctlr, flags); |
| 1395 | |
| 1396 | /* Since this is really a block driver, the SCSI core may not be |
| 1397 | initialized at init time, in which case, calling scsi_register_host |
| 1398 | would hang. Instead, we do it later, via /proc filesystem |
| 1399 | and rc scripts, when we know SCSI core is good to go. */ |
| 1400 | |
| 1401 | /* Only register if SCSI devices are detected. */ |
| 1402 | if (ccissscsi[ctlr].ndevices != 0) { |
| 1403 | ((struct cciss_scsi_adapter_data_t *) |
| 1404 | hba[ctlr]->scsi_ctlr)->registered = 1; |
| 1405 | CPQ_TAPE_UNLOCK(ctlr, flags); |
| 1406 | return cciss_scsi_detect(ctlr); |
| 1407 | } |
| 1408 | CPQ_TAPE_UNLOCK(ctlr, flags); |
| 1409 | printk(KERN_INFO |
| 1410 | "cciss%d: No appropriate SCSI device detected, " |
| 1411 | "SCSI subsystem not engaged.\n", ctlr); |
| 1412 | return 0; |
| 1413 | } |
| 1414 | |
| 1415 | static int |
| 1416 | cciss_engage_scsi(int ctlr) |
| 1417 | { |
| 1418 | struct cciss_scsi_adapter_data_t *sa; |
| 1419 | struct cciss_scsi_cmd_stack_t *stk; |
| 1420 | unsigned long flags; |
| 1421 | |
| 1422 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1423 | sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; |
| 1424 | stk = &sa->cmd_stack; |
| 1425 | |
| 1426 | if (((struct cciss_scsi_adapter_data_t *) |
| 1427 | hba[ctlr]->scsi_ctlr)->registered) { |
| 1428 | printk("cciss%d: SCSI subsystem already engaged.\n", ctlr); |
| 1429 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1430 | return ENXIO; |
| 1431 | } |
| 1432 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1433 | cciss_update_non_disk_devices(ctlr, -1); |
| 1434 | cciss_register_scsi(ctlr); |
| 1435 | return 0; |
| 1436 | } |
| 1437 | |
| 1438 | static void |
| 1439 | cciss_proc_tape_report(int ctlr, unsigned char *buffer, off_t *pos, off_t *len) |
| 1440 | { |
| 1441 | unsigned long flags; |
| 1442 | int size; |
| 1443 | |
| 1444 | *pos = *pos -1; *len = *len - 1; // cut off the last trailing newline |
| 1445 | |
| 1446 | CPQ_TAPE_LOCK(ctlr, flags); |
| 1447 | size = sprintf(buffer + *len, |
Mike Miller | b9f0bd0 | 2005-09-13 01:25:26 -0700 | [diff] [blame] | 1448 | "Sequential access devices: %d\n\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | ccissscsi[ctlr].ndevices); |
| 1450 | CPQ_TAPE_UNLOCK(ctlr, flags); |
| 1451 | *pos += size; *len += size; |
| 1452 | } |
| 1453 | |
mike.miller@hp.com | 3da8b71 | 2005-11-04 12:30:37 -0600 | [diff] [blame] | 1454 | /* Need at least one of these error handlers to keep ../scsi/hosts.c from |
| 1455 | * complaining. Doing a host- or bus-reset can't do anything good here. |
| 1456 | * Despite what it might say in scsi_error.c, there may well be commands |
| 1457 | * on the controller, as the cciss driver registers twice, once as a block |
| 1458 | * device for the logical drives, and once as a scsi device, for any tape |
| 1459 | * drives. So we know there are no commands out on the tape drives, but we |
| 1460 | * don't know there are no commands on the controller, and it is likely |
| 1461 | * that there probably are, as the cciss block device is most commonly used |
| 1462 | * as a boot device (embedded controller on HP/Compaq systems.) |
| 1463 | */ |
| 1464 | |
| 1465 | static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) |
| 1466 | { |
| 1467 | int rc; |
| 1468 | CommandList_struct *cmd_in_trouble; |
| 1469 | ctlr_info_t **c; |
| 1470 | int ctlr; |
| 1471 | |
| 1472 | /* find the controller to which the command to be aborted was sent */ |
| 1473 | c = (ctlr_info_t **) &scsicmd->device->host->hostdata[0]; |
| 1474 | if (c == NULL) /* paranoia */ |
| 1475 | return FAILED; |
| 1476 | ctlr = (*c)->ctlr; |
| 1477 | printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr); |
| 1478 | |
| 1479 | /* find the command that's giving us trouble */ |
| 1480 | cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; |
| 1481 | if (cmd_in_trouble == NULL) { /* paranoia */ |
| 1482 | return FAILED; |
| 1483 | } |
| 1484 | /* send a reset to the SCSI LUN which the command was sent to */ |
| 1485 | rc = sendcmd(CCISS_RESET_MSG, ctlr, NULL, 0, 2, 0, 0, |
| 1486 | (unsigned char *) &cmd_in_trouble->Header.LUN.LunAddrBytes[0], |
| 1487 | TYPE_MSG); |
| 1488 | /* sendcmd turned off interrputs on the board, turn 'em back on. */ |
| 1489 | (*c)->access.set_intr_mask(*c, CCISS_INTR_ON); |
| 1490 | if (rc == 0) |
| 1491 | return SUCCESS; |
| 1492 | printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr); |
| 1493 | return FAILED; |
| 1494 | } |
| 1495 | |
| 1496 | static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) |
| 1497 | { |
| 1498 | int rc; |
| 1499 | CommandList_struct *cmd_to_abort; |
| 1500 | ctlr_info_t **c; |
| 1501 | int ctlr; |
| 1502 | |
| 1503 | /* find the controller to which the command to be aborted was sent */ |
| 1504 | c = (ctlr_info_t **) &scsicmd->device->host->hostdata[0]; |
| 1505 | if (c == NULL) /* paranoia */ |
| 1506 | return FAILED; |
| 1507 | ctlr = (*c)->ctlr; |
| 1508 | printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", ctlr); |
| 1509 | |
| 1510 | /* find the command to be aborted */ |
| 1511 | cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; |
| 1512 | if (cmd_to_abort == NULL) /* paranoia */ |
| 1513 | return FAILED; |
| 1514 | rc = sendcmd(CCISS_ABORT_MSG, ctlr, &cmd_to_abort->Header.Tag, |
| 1515 | 0, 2, 0, 0, |
| 1516 | (unsigned char *) &cmd_to_abort->Header.LUN.LunAddrBytes[0], |
| 1517 | TYPE_MSG); |
| 1518 | /* sendcmd turned off interrputs on the board, turn 'em back on. */ |
| 1519 | (*c)->access.set_intr_mask(*c, CCISS_INTR_ON); |
| 1520 | if (rc == 0) |
| 1521 | return SUCCESS; |
| 1522 | return FAILED; |
| 1523 | |
| 1524 | } |
| 1525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | #else /* no CONFIG_CISS_SCSI_TAPE */ |
| 1527 | |
| 1528 | /* If no tape support, then these become defined out of existence */ |
| 1529 | |
| 1530 | #define cciss_scsi_setup(cntl_num) |
| 1531 | #define cciss_unregister_scsi(ctlr) |
| 1532 | #define cciss_register_scsi(ctlr) |
| 1533 | #define cciss_proc_tape_report(ctlr, buffer, pos, len) |
| 1534 | |
| 1535 | #endif /* CONFIG_CISS_SCSI_TAPE */ |