cciss.c revision da5503217d7421dbf04a0557d16cae6d5fc0960e
1/* 2 * Disk Array driver for HP Smart Array controllers. 3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P. 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; version 2 of the License. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 * 02111-1307, USA. 18 * 19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com 20 * 21 */ 22 23#include <linux/module.h> 24#include <linux/interrupt.h> 25#include <linux/types.h> 26#include <linux/pci.h> 27#include <linux/kernel.h> 28#include <linux/slab.h> 29#include <linux/smp_lock.h> 30#include <linux/delay.h> 31#include <linux/major.h> 32#include <linux/fs.h> 33#include <linux/bio.h> 34#include <linux/blkpg.h> 35#include <linux/timer.h> 36#include <linux/proc_fs.h> 37#include <linux/seq_file.h> 38#include <linux/init.h> 39#include <linux/jiffies.h> 40#include <linux/hdreg.h> 41#include <linux/spinlock.h> 42#include <linux/compat.h> 43#include <linux/mutex.h> 44#include <asm/uaccess.h> 45#include <asm/io.h> 46 47#include <linux/dma-mapping.h> 48#include <linux/blkdev.h> 49#include <linux/genhd.h> 50#include <linux/completion.h> 51#include <scsi/scsi.h> 52#include <scsi/sg.h> 53#include <scsi/scsi_ioctl.h> 54#include <linux/cdrom.h> 55#include <linux/scatterlist.h> 56#include <linux/kthread.h> 57 58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin)) 59#define DRIVER_NAME "HP CISS Driver (v 3.6.26)" 60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 26) 61 62/* Embedded module documentation macros - see modules.h */ 63MODULE_AUTHOR("Hewlett-Packard Company"); 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers"); 65MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers"); 66MODULE_VERSION("3.6.26"); 67MODULE_LICENSE("GPL"); 68 69static int cciss_allow_hpsa; 70module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR); 71MODULE_PARM_DESC(cciss_allow_hpsa, 72 "Prevent cciss driver from accessing hardware known to be " 73 " supported by the hpsa driver"); 74 75#include "cciss_cmd.h" 76#include "cciss.h" 77#include <linux/cciss_ioctl.h> 78 79/* define the PCI info for the cards we can control */ 80static const struct pci_device_id cciss_pci_device_id[] = { 81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070}, 82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080}, 83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082}, 84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083}, 85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091}, 86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A}, 87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B}, 88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C}, 89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D}, 90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225}, 91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223}, 92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234}, 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235}, 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211}, 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212}, 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213}, 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214}, 98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215}, 99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237}, 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D}, 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241}, 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243}, 103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245}, 104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247}, 105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249}, 106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A}, 107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B}, 108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3250}, 109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3251}, 110 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3252}, 111 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3253}, 112 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3254}, 113 {0,} 114}; 115 116MODULE_DEVICE_TABLE(pci, cciss_pci_device_id); 117 118/* board_id = Subsystem Device ID & Vendor ID 119 * product = Marketing Name for the board 120 * access = Address of the struct of function pointers 121 */ 122static struct board_type products[] = { 123 {0x40700E11, "Smart Array 5300", &SA5_access}, 124 {0x40800E11, "Smart Array 5i", &SA5B_access}, 125 {0x40820E11, "Smart Array 532", &SA5B_access}, 126 {0x40830E11, "Smart Array 5312", &SA5B_access}, 127 {0x409A0E11, "Smart Array 641", &SA5_access}, 128 {0x409B0E11, "Smart Array 642", &SA5_access}, 129 {0x409C0E11, "Smart Array 6400", &SA5_access}, 130 {0x409D0E11, "Smart Array 6400 EM", &SA5_access}, 131 {0x40910E11, "Smart Array 6i", &SA5_access}, 132 {0x3225103C, "Smart Array P600", &SA5_access}, 133 {0x3235103C, "Smart Array P400i", &SA5_access}, 134 {0x3211103C, "Smart Array E200i", &SA5_access}, 135 {0x3212103C, "Smart Array E200", &SA5_access}, 136 {0x3213103C, "Smart Array E200i", &SA5_access}, 137 {0x3214103C, "Smart Array E200i", &SA5_access}, 138 {0x3215103C, "Smart Array E200i", &SA5_access}, 139 {0x3237103C, "Smart Array E500", &SA5_access}, 140/* controllers below this line are also supported by the hpsa driver. */ 141#define HPSA_BOUNDARY 0x3223103C 142 {0x3223103C, "Smart Array P800", &SA5_access}, 143 {0x3234103C, "Smart Array P400", &SA5_access}, 144 {0x323D103C, "Smart Array P700m", &SA5_access}, 145 {0x3241103C, "Smart Array P212", &SA5_access}, 146 {0x3243103C, "Smart Array P410", &SA5_access}, 147 {0x3245103C, "Smart Array P410i", &SA5_access}, 148 {0x3247103C, "Smart Array P411", &SA5_access}, 149 {0x3249103C, "Smart Array P812", &SA5_access}, 150 {0x324A103C, "Smart Array P712m", &SA5_access}, 151 {0x324B103C, "Smart Array P711m", &SA5_access}, 152 {0x3250103C, "Smart Array", &SA5_access}, 153 {0x3251103C, "Smart Array", &SA5_access}, 154 {0x3252103C, "Smart Array", &SA5_access}, 155 {0x3253103C, "Smart Array", &SA5_access}, 156 {0x3254103C, "Smart Array", &SA5_access}, 157}; 158 159/* How long to wait (in milliseconds) for board to go into simple mode */ 160#define MAX_CONFIG_WAIT 30000 161#define MAX_IOCTL_CONFIG_WAIT 1000 162 163/*define how many times we will try a command because of bus resets */ 164#define MAX_CMD_RETRIES 3 165 166#define MAX_CTLR 32 167 168/* Originally cciss driver only supports 8 major numbers */ 169#define MAX_CTLR_ORIG 8 170 171static ctlr_info_t *hba[MAX_CTLR]; 172 173static struct task_struct *cciss_scan_thread; 174static DEFINE_MUTEX(scan_mutex); 175static LIST_HEAD(scan_q); 176 177static void do_cciss_request(struct request_queue *q); 178static irqreturn_t do_cciss_intx(int irq, void *dev_id); 179static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id); 180static int cciss_open(struct block_device *bdev, fmode_t mode); 181static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode); 182static int cciss_release(struct gendisk *disk, fmode_t mode); 183static int do_ioctl(struct block_device *bdev, fmode_t mode, 184 unsigned int cmd, unsigned long arg); 185static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 186 unsigned int cmd, unsigned long arg); 187static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); 188 189static int cciss_revalidate(struct gendisk *disk); 190static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl); 191static int deregister_disk(ctlr_info_t *h, int drv_index, 192 int clear_all, int via_ioctl); 193 194static void cciss_read_capacity(int ctlr, int logvol, 195 sector_t *total_size, unsigned int *block_size); 196static void cciss_read_capacity_16(int ctlr, int logvol, 197 sector_t *total_size, unsigned int *block_size); 198static void cciss_geometry_inquiry(int ctlr, int logvol, 199 sector_t total_size, 200 unsigned int block_size, InquiryData_struct *inq_buff, 201 drive_info_struct *drv); 202static void __devinit cciss_interrupt_mode(ctlr_info_t *); 203static void start_io(ctlr_info_t *h); 204static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 205 __u8 page_code, unsigned char scsi3addr[], 206 int cmd_type); 207static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 208 int attempt_retry); 209static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c); 210 211static int add_to_scan_list(struct ctlr_info *h); 212static int scan_thread(void *data); 213static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c); 214static void cciss_hba_release(struct device *dev); 215static void cciss_device_release(struct device *dev); 216static void cciss_free_gendisk(ctlr_info_t *h, int drv_index); 217static void cciss_free_drive_info(ctlr_info_t *h, int drv_index); 218static inline u32 next_command(ctlr_info_t *h); 219 220/* performant mode helper functions */ 221static void calc_bucket_map(int *bucket, int num_buckets, int nsgs, 222 int *bucket_map); 223static void cciss_put_controller_into_performant_mode(ctlr_info_t *h); 224 225#ifdef CONFIG_PROC_FS 226static void cciss_procinit(int i); 227#else 228static void cciss_procinit(int i) 229{ 230} 231#endif /* CONFIG_PROC_FS */ 232 233#ifdef CONFIG_COMPAT 234static int cciss_compat_ioctl(struct block_device *, fmode_t, 235 unsigned, unsigned long); 236#endif 237 238static const struct block_device_operations cciss_fops = { 239 .owner = THIS_MODULE, 240 .open = cciss_unlocked_open, 241 .release = cciss_release, 242 .ioctl = do_ioctl, 243 .getgeo = cciss_getgeo, 244#ifdef CONFIG_COMPAT 245 .compat_ioctl = cciss_compat_ioctl, 246#endif 247 .revalidate_disk = cciss_revalidate, 248}; 249 250/* set_performant_mode: Modify the tag for cciss performant 251 * set bit 0 for pull model, bits 3-1 for block fetch 252 * register number 253 */ 254static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c) 255{ 256 if (likely(h->transMethod == CFGTBL_Trans_Performant)) 257 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1); 258} 259 260/* 261 * Enqueuing and dequeuing functions for cmdlists. 262 */ 263static inline void addQ(struct hlist_head *list, CommandList_struct *c) 264{ 265 hlist_add_head(&c->list, list); 266} 267 268static inline void removeQ(CommandList_struct *c) 269{ 270 /* 271 * After kexec/dump some commands might still 272 * be in flight, which the firmware will try 273 * to complete. Resetting the firmware doesn't work 274 * with old fw revisions, so we have to mark 275 * them off as 'stale' to prevent the driver from 276 * falling over. 277 */ 278 if (WARN_ON(hlist_unhashed(&c->list))) { 279 c->cmd_type = CMD_MSG_STALE; 280 return; 281 } 282 283 hlist_del_init(&c->list); 284} 285 286static void enqueue_cmd_and_start_io(ctlr_info_t *h, 287 CommandList_struct *c) 288{ 289 unsigned long flags; 290 set_performant_mode(h, c); 291 spin_lock_irqsave(&h->lock, flags); 292 addQ(&h->reqQ, c); 293 h->Qdepth++; 294 start_io(h); 295 spin_unlock_irqrestore(&h->lock, flags); 296} 297 298static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list, 299 int nr_cmds) 300{ 301 int i; 302 303 if (!cmd_sg_list) 304 return; 305 for (i = 0; i < nr_cmds; i++) { 306 kfree(cmd_sg_list[i]); 307 cmd_sg_list[i] = NULL; 308 } 309 kfree(cmd_sg_list); 310} 311 312static SGDescriptor_struct **cciss_allocate_sg_chain_blocks( 313 ctlr_info_t *h, int chainsize, int nr_cmds) 314{ 315 int j; 316 SGDescriptor_struct **cmd_sg_list; 317 318 if (chainsize <= 0) 319 return NULL; 320 321 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL); 322 if (!cmd_sg_list) 323 return NULL; 324 325 /* Build up chain blocks for each command */ 326 for (j = 0; j < nr_cmds; j++) { 327 /* Need a block of chainsized s/g elements. */ 328 cmd_sg_list[j] = kmalloc((chainsize * 329 sizeof(*cmd_sg_list[j])), GFP_KERNEL); 330 if (!cmd_sg_list[j]) { 331 dev_err(&h->pdev->dev, "Cannot get memory " 332 "for s/g chains.\n"); 333 goto clean; 334 } 335 } 336 return cmd_sg_list; 337clean: 338 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds); 339 return NULL; 340} 341 342static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c) 343{ 344 SGDescriptor_struct *chain_sg; 345 u64bit temp64; 346 347 if (c->Header.SGTotal <= h->max_cmd_sgentries) 348 return; 349 350 chain_sg = &c->SG[h->max_cmd_sgentries - 1]; 351 temp64.val32.lower = chain_sg->Addr.lower; 352 temp64.val32.upper = chain_sg->Addr.upper; 353 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE); 354} 355 356static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c, 357 SGDescriptor_struct *chain_block, int len) 358{ 359 SGDescriptor_struct *chain_sg; 360 u64bit temp64; 361 362 chain_sg = &c->SG[h->max_cmd_sgentries - 1]; 363 chain_sg->Ext = CCISS_SG_CHAIN; 364 chain_sg->Len = len; 365 temp64.val = pci_map_single(h->pdev, chain_block, len, 366 PCI_DMA_TODEVICE); 367 chain_sg->Addr.lower = temp64.val32.lower; 368 chain_sg->Addr.upper = temp64.val32.upper; 369} 370 371#include "cciss_scsi.c" /* For SCSI tape support */ 372 373static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", 374 "UNKNOWN" 375}; 376#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1) 377 378#ifdef CONFIG_PROC_FS 379 380/* 381 * Report information about this controller. 382 */ 383#define ENG_GIG 1000000000 384#define ENG_GIG_FACTOR (ENG_GIG/512) 385#define ENGAGE_SCSI "engage scsi" 386 387static struct proc_dir_entry *proc_cciss; 388 389static void cciss_seq_show_header(struct seq_file *seq) 390{ 391 ctlr_info_t *h = seq->private; 392 393 seq_printf(seq, "%s: HP %s Controller\n" 394 "Board ID: 0x%08lx\n" 395 "Firmware Version: %c%c%c%c\n" 396 "IRQ: %d\n" 397 "Logical drives: %d\n" 398 "Current Q depth: %d\n" 399 "Current # commands on controller: %d\n" 400 "Max Q depth since init: %d\n" 401 "Max # commands on controller since init: %d\n" 402 "Max SG entries since init: %d\n", 403 h->devname, 404 h->product_name, 405 (unsigned long)h->board_id, 406 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], 407 h->firm_ver[3], (unsigned int)h->intr[PERF_MODE_INT], 408 h->num_luns, 409 h->Qdepth, h->commands_outstanding, 410 h->maxQsinceinit, h->max_outstanding, h->maxSG); 411 412#ifdef CONFIG_CISS_SCSI_TAPE 413 cciss_seq_tape_report(seq, h->ctlr); 414#endif /* CONFIG_CISS_SCSI_TAPE */ 415} 416 417static void *cciss_seq_start(struct seq_file *seq, loff_t *pos) 418{ 419 ctlr_info_t *h = seq->private; 420 unsigned ctlr = h->ctlr; 421 unsigned long flags; 422 423 /* prevent displaying bogus info during configuration 424 * or deconfiguration of a logical volume 425 */ 426 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 427 if (h->busy_configuring) { 428 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 429 return ERR_PTR(-EBUSY); 430 } 431 h->busy_configuring = 1; 432 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 433 434 if (*pos == 0) 435 cciss_seq_show_header(seq); 436 437 return pos; 438} 439 440static int cciss_seq_show(struct seq_file *seq, void *v) 441{ 442 sector_t vol_sz, vol_sz_frac; 443 ctlr_info_t *h = seq->private; 444 unsigned ctlr = h->ctlr; 445 loff_t *pos = v; 446 drive_info_struct *drv = h->drv[*pos]; 447 448 if (*pos > h->highest_lun) 449 return 0; 450 451 if (drv == NULL) /* it's possible for h->drv[] to have holes. */ 452 return 0; 453 454 if (drv->heads == 0) 455 return 0; 456 457 vol_sz = drv->nr_blocks; 458 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR); 459 vol_sz_frac *= 100; 460 sector_div(vol_sz_frac, ENG_GIG_FACTOR); 461 462 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN) 463 drv->raid_level = RAID_UNKNOWN; 464 seq_printf(seq, "cciss/c%dd%d:" 465 "\t%4u.%02uGB\tRAID %s\n", 466 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac, 467 raid_label[drv->raid_level]); 468 return 0; 469} 470 471static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos) 472{ 473 ctlr_info_t *h = seq->private; 474 475 if (*pos > h->highest_lun) 476 return NULL; 477 *pos += 1; 478 479 return pos; 480} 481 482static void cciss_seq_stop(struct seq_file *seq, void *v) 483{ 484 ctlr_info_t *h = seq->private; 485 486 /* Only reset h->busy_configuring if we succeeded in setting 487 * it during cciss_seq_start. */ 488 if (v == ERR_PTR(-EBUSY)) 489 return; 490 491 h->busy_configuring = 0; 492} 493 494static const struct seq_operations cciss_seq_ops = { 495 .start = cciss_seq_start, 496 .show = cciss_seq_show, 497 .next = cciss_seq_next, 498 .stop = cciss_seq_stop, 499}; 500 501static int cciss_seq_open(struct inode *inode, struct file *file) 502{ 503 int ret = seq_open(file, &cciss_seq_ops); 504 struct seq_file *seq = file->private_data; 505 506 if (!ret) 507 seq->private = PDE(inode)->data; 508 509 return ret; 510} 511 512static ssize_t 513cciss_proc_write(struct file *file, const char __user *buf, 514 size_t length, loff_t *ppos) 515{ 516 int err; 517 char *buffer; 518 519#ifndef CONFIG_CISS_SCSI_TAPE 520 return -EINVAL; 521#endif 522 523 if (!buf || length > PAGE_SIZE - 1) 524 return -EINVAL; 525 526 buffer = (char *)__get_free_page(GFP_KERNEL); 527 if (!buffer) 528 return -ENOMEM; 529 530 err = -EFAULT; 531 if (copy_from_user(buffer, buf, length)) 532 goto out; 533 buffer[length] = '\0'; 534 535#ifdef CONFIG_CISS_SCSI_TAPE 536 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) { 537 struct seq_file *seq = file->private_data; 538 ctlr_info_t *h = seq->private; 539 540 err = cciss_engage_scsi(h->ctlr); 541 if (err == 0) 542 err = length; 543 } else 544#endif /* CONFIG_CISS_SCSI_TAPE */ 545 err = -EINVAL; 546 /* might be nice to have "disengage" too, but it's not 547 safely possible. (only 1 module use count, lock issues.) */ 548 549out: 550 free_page((unsigned long)buffer); 551 return err; 552} 553 554static const struct file_operations cciss_proc_fops = { 555 .owner = THIS_MODULE, 556 .open = cciss_seq_open, 557 .read = seq_read, 558 .llseek = seq_lseek, 559 .release = seq_release, 560 .write = cciss_proc_write, 561}; 562 563static void __devinit cciss_procinit(int i) 564{ 565 struct proc_dir_entry *pde; 566 567 if (proc_cciss == NULL) 568 proc_cciss = proc_mkdir("driver/cciss", NULL); 569 if (!proc_cciss) 570 return; 571 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP | 572 S_IROTH, proc_cciss, 573 &cciss_proc_fops, hba[i]); 574} 575#endif /* CONFIG_PROC_FS */ 576 577#define MAX_PRODUCT_NAME_LEN 19 578 579#define to_hba(n) container_of(n, struct ctlr_info, dev) 580#define to_drv(n) container_of(n, drive_info_struct, dev) 581 582static ssize_t host_store_rescan(struct device *dev, 583 struct device_attribute *attr, 584 const char *buf, size_t count) 585{ 586 struct ctlr_info *h = to_hba(dev); 587 588 add_to_scan_list(h); 589 wake_up_process(cciss_scan_thread); 590 wait_for_completion_interruptible(&h->scan_wait); 591 592 return count; 593} 594static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); 595 596static ssize_t dev_show_unique_id(struct device *dev, 597 struct device_attribute *attr, 598 char *buf) 599{ 600 drive_info_struct *drv = to_drv(dev); 601 struct ctlr_info *h = to_hba(drv->dev.parent); 602 __u8 sn[16]; 603 unsigned long flags; 604 int ret = 0; 605 606 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 607 if (h->busy_configuring) 608 ret = -EBUSY; 609 else 610 memcpy(sn, drv->serial_no, sizeof(sn)); 611 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 612 613 if (ret) 614 return ret; 615 else 616 return snprintf(buf, 16 * 2 + 2, 617 "%02X%02X%02X%02X%02X%02X%02X%02X" 618 "%02X%02X%02X%02X%02X%02X%02X%02X\n", 619 sn[0], sn[1], sn[2], sn[3], 620 sn[4], sn[5], sn[6], sn[7], 621 sn[8], sn[9], sn[10], sn[11], 622 sn[12], sn[13], sn[14], sn[15]); 623} 624static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL); 625 626static ssize_t dev_show_vendor(struct device *dev, 627 struct device_attribute *attr, 628 char *buf) 629{ 630 drive_info_struct *drv = to_drv(dev); 631 struct ctlr_info *h = to_hba(drv->dev.parent); 632 char vendor[VENDOR_LEN + 1]; 633 unsigned long flags; 634 int ret = 0; 635 636 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 637 if (h->busy_configuring) 638 ret = -EBUSY; 639 else 640 memcpy(vendor, drv->vendor, VENDOR_LEN + 1); 641 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 642 643 if (ret) 644 return ret; 645 else 646 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor); 647} 648static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL); 649 650static ssize_t dev_show_model(struct device *dev, 651 struct device_attribute *attr, 652 char *buf) 653{ 654 drive_info_struct *drv = to_drv(dev); 655 struct ctlr_info *h = to_hba(drv->dev.parent); 656 char model[MODEL_LEN + 1]; 657 unsigned long flags; 658 int ret = 0; 659 660 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 661 if (h->busy_configuring) 662 ret = -EBUSY; 663 else 664 memcpy(model, drv->model, MODEL_LEN + 1); 665 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 666 667 if (ret) 668 return ret; 669 else 670 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model); 671} 672static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL); 673 674static ssize_t dev_show_rev(struct device *dev, 675 struct device_attribute *attr, 676 char *buf) 677{ 678 drive_info_struct *drv = to_drv(dev); 679 struct ctlr_info *h = to_hba(drv->dev.parent); 680 char rev[REV_LEN + 1]; 681 unsigned long flags; 682 int ret = 0; 683 684 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 685 if (h->busy_configuring) 686 ret = -EBUSY; 687 else 688 memcpy(rev, drv->rev, REV_LEN + 1); 689 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 690 691 if (ret) 692 return ret; 693 else 694 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev); 695} 696static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); 697 698static ssize_t cciss_show_lunid(struct device *dev, 699 struct device_attribute *attr, char *buf) 700{ 701 drive_info_struct *drv = to_drv(dev); 702 struct ctlr_info *h = to_hba(drv->dev.parent); 703 unsigned long flags; 704 unsigned char lunid[8]; 705 706 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 707 if (h->busy_configuring) { 708 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 709 return -EBUSY; 710 } 711 if (!drv->heads) { 712 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 713 return -ENOTTY; 714 } 715 memcpy(lunid, drv->LunID, sizeof(lunid)); 716 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 717 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 718 lunid[0], lunid[1], lunid[2], lunid[3], 719 lunid[4], lunid[5], lunid[6], lunid[7]); 720} 721static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); 722 723static ssize_t cciss_show_raid_level(struct device *dev, 724 struct device_attribute *attr, char *buf) 725{ 726 drive_info_struct *drv = to_drv(dev); 727 struct ctlr_info *h = to_hba(drv->dev.parent); 728 int raid; 729 unsigned long flags; 730 731 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 732 if (h->busy_configuring) { 733 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 734 return -EBUSY; 735 } 736 raid = drv->raid_level; 737 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 738 if (raid < 0 || raid > RAID_UNKNOWN) 739 raid = RAID_UNKNOWN; 740 741 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n", 742 raid_label[raid]); 743} 744static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL); 745 746static ssize_t cciss_show_usage_count(struct device *dev, 747 struct device_attribute *attr, char *buf) 748{ 749 drive_info_struct *drv = to_drv(dev); 750 struct ctlr_info *h = to_hba(drv->dev.parent); 751 unsigned long flags; 752 int count; 753 754 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 755 if (h->busy_configuring) { 756 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 757 return -EBUSY; 758 } 759 count = drv->usage_count; 760 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 761 return snprintf(buf, 20, "%d\n", count); 762} 763static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); 764 765static struct attribute *cciss_host_attrs[] = { 766 &dev_attr_rescan.attr, 767 NULL 768}; 769 770static struct attribute_group cciss_host_attr_group = { 771 .attrs = cciss_host_attrs, 772}; 773 774static const struct attribute_group *cciss_host_attr_groups[] = { 775 &cciss_host_attr_group, 776 NULL 777}; 778 779static struct device_type cciss_host_type = { 780 .name = "cciss_host", 781 .groups = cciss_host_attr_groups, 782 .release = cciss_hba_release, 783}; 784 785static struct attribute *cciss_dev_attrs[] = { 786 &dev_attr_unique_id.attr, 787 &dev_attr_model.attr, 788 &dev_attr_vendor.attr, 789 &dev_attr_rev.attr, 790 &dev_attr_lunid.attr, 791 &dev_attr_raid_level.attr, 792 &dev_attr_usage_count.attr, 793 NULL 794}; 795 796static struct attribute_group cciss_dev_attr_group = { 797 .attrs = cciss_dev_attrs, 798}; 799 800static const struct attribute_group *cciss_dev_attr_groups[] = { 801 &cciss_dev_attr_group, 802 NULL 803}; 804 805static struct device_type cciss_dev_type = { 806 .name = "cciss_device", 807 .groups = cciss_dev_attr_groups, 808 .release = cciss_device_release, 809}; 810 811static struct bus_type cciss_bus_type = { 812 .name = "cciss", 813}; 814 815/* 816 * cciss_hba_release is called when the reference count 817 * of h->dev goes to zero. 818 */ 819static void cciss_hba_release(struct device *dev) 820{ 821 /* 822 * nothing to do, but need this to avoid a warning 823 * about not having a release handler from lib/kref.c. 824 */ 825} 826 827/* 828 * Initialize sysfs entry for each controller. This sets up and registers 829 * the 'cciss#' directory for each individual controller under 830 * /sys/bus/pci/devices/<dev>/. 831 */ 832static int cciss_create_hba_sysfs_entry(struct ctlr_info *h) 833{ 834 device_initialize(&h->dev); 835 h->dev.type = &cciss_host_type; 836 h->dev.bus = &cciss_bus_type; 837 dev_set_name(&h->dev, "%s", h->devname); 838 h->dev.parent = &h->pdev->dev; 839 840 return device_add(&h->dev); 841} 842 843/* 844 * Remove sysfs entries for an hba. 845 */ 846static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h) 847{ 848 device_del(&h->dev); 849 put_device(&h->dev); /* final put. */ 850} 851 852/* cciss_device_release is called when the reference count 853 * of h->drv[x]dev goes to zero. 854 */ 855static void cciss_device_release(struct device *dev) 856{ 857 drive_info_struct *drv = to_drv(dev); 858 kfree(drv); 859} 860 861/* 862 * Initialize sysfs for each logical drive. This sets up and registers 863 * the 'c#d#' directory for each individual logical drive under 864 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from 865 * /sys/block/cciss!c#d# to this entry. 866 */ 867static long cciss_create_ld_sysfs_entry(struct ctlr_info *h, 868 int drv_index) 869{ 870 struct device *dev; 871 872 if (h->drv[drv_index]->device_initialized) 873 return 0; 874 875 dev = &h->drv[drv_index]->dev; 876 device_initialize(dev); 877 dev->type = &cciss_dev_type; 878 dev->bus = &cciss_bus_type; 879 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index); 880 dev->parent = &h->dev; 881 h->drv[drv_index]->device_initialized = 1; 882 return device_add(dev); 883} 884 885/* 886 * Remove sysfs entries for a logical drive. 887 */ 888static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index, 889 int ctlr_exiting) 890{ 891 struct device *dev = &h->drv[drv_index]->dev; 892 893 /* special case for c*d0, we only destroy it on controller exit */ 894 if (drv_index == 0 && !ctlr_exiting) 895 return; 896 897 device_del(dev); 898 put_device(dev); /* the "final" put. */ 899 h->drv[drv_index] = NULL; 900} 901 902/* 903 * For operations that cannot sleep, a command block is allocated at init, 904 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track 905 * which ones are free or in use. For operations that can wait for kmalloc 906 * to possible sleep, this routine can be called with get_from_pool set to 0. 907 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was. 908 */ 909static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool) 910{ 911 CommandList_struct *c; 912 int i; 913 u64bit temp64; 914 dma_addr_t cmd_dma_handle, err_dma_handle; 915 916 if (!get_from_pool) { 917 c = (CommandList_struct *) pci_alloc_consistent(h->pdev, 918 sizeof(CommandList_struct), &cmd_dma_handle); 919 if (c == NULL) 920 return NULL; 921 memset(c, 0, sizeof(CommandList_struct)); 922 923 c->cmdindex = -1; 924 925 c->err_info = (ErrorInfo_struct *) 926 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct), 927 &err_dma_handle); 928 929 if (c->err_info == NULL) { 930 pci_free_consistent(h->pdev, 931 sizeof(CommandList_struct), c, cmd_dma_handle); 932 return NULL; 933 } 934 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 935 } else { /* get it out of the controllers pool */ 936 937 do { 938 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); 939 if (i == h->nr_cmds) 940 return NULL; 941 } while (test_and_set_bit 942 (i & (BITS_PER_LONG - 1), 943 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); 944#ifdef CCISS_DEBUG 945 printk(KERN_DEBUG "cciss: using command buffer %d\n", i); 946#endif 947 c = h->cmd_pool + i; 948 memset(c, 0, sizeof(CommandList_struct)); 949 cmd_dma_handle = h->cmd_pool_dhandle 950 + i * sizeof(CommandList_struct); 951 c->err_info = h->errinfo_pool + i; 952 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 953 err_dma_handle = h->errinfo_pool_dhandle 954 + i * sizeof(ErrorInfo_struct); 955 h->nr_allocs++; 956 957 c->cmdindex = i; 958 } 959 960 INIT_HLIST_NODE(&c->list); 961 c->busaddr = (__u32) cmd_dma_handle; 962 temp64.val = (__u64) err_dma_handle; 963 c->ErrDesc.Addr.lower = temp64.val32.lower; 964 c->ErrDesc.Addr.upper = temp64.val32.upper; 965 c->ErrDesc.Len = sizeof(ErrorInfo_struct); 966 967 c->ctlr = h->ctlr; 968 return c; 969} 970 971/* 972 * Frees a command block that was previously allocated with cmd_alloc(). 973 */ 974static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool) 975{ 976 int i; 977 u64bit temp64; 978 979 if (!got_from_pool) { 980 temp64.val32.lower = c->ErrDesc.Addr.lower; 981 temp64.val32.upper = c->ErrDesc.Addr.upper; 982 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct), 983 c->err_info, (dma_addr_t) temp64.val); 984 pci_free_consistent(h->pdev, sizeof(CommandList_struct), 985 c, (dma_addr_t) c->busaddr); 986 } else { 987 i = c - h->cmd_pool; 988 clear_bit(i & (BITS_PER_LONG - 1), 989 h->cmd_pool_bits + (i / BITS_PER_LONG)); 990 h->nr_frees++; 991 } 992} 993 994static inline ctlr_info_t *get_host(struct gendisk *disk) 995{ 996 return disk->queue->queuedata; 997} 998 999static inline drive_info_struct *get_drv(struct gendisk *disk) 1000{ 1001 return disk->private_data; 1002} 1003 1004/* 1005 * Open. Make sure the device is really there. 1006 */ 1007static int cciss_open(struct block_device *bdev, fmode_t mode) 1008{ 1009 ctlr_info_t *host = get_host(bdev->bd_disk); 1010 drive_info_struct *drv = get_drv(bdev->bd_disk); 1011 1012#ifdef CCISS_DEBUG 1013 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name); 1014#endif /* CCISS_DEBUG */ 1015 1016 if (drv->busy_configuring) 1017 return -EBUSY; 1018 /* 1019 * Root is allowed to open raw volume zero even if it's not configured 1020 * so array config can still work. Root is also allowed to open any 1021 * volume that has a LUN ID, so it can issue IOCTL to reread the 1022 * disk information. I don't think I really like this 1023 * but I'm already using way to many device nodes to claim another one 1024 * for "raw controller". 1025 */ 1026 if (drv->heads == 0) { 1027 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */ 1028 /* if not node 0 make sure it is a partition = 0 */ 1029 if (MINOR(bdev->bd_dev) & 0x0f) { 1030 return -ENXIO; 1031 /* if it is, make sure we have a LUN ID */ 1032 } else if (memcmp(drv->LunID, CTLR_LUNID, 1033 sizeof(drv->LunID))) { 1034 return -ENXIO; 1035 } 1036 } 1037 if (!capable(CAP_SYS_ADMIN)) 1038 return -EPERM; 1039 } 1040 drv->usage_count++; 1041 host->usage_count++; 1042 return 0; 1043} 1044 1045static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode) 1046{ 1047 int ret; 1048 1049 lock_kernel(); 1050 ret = cciss_open(bdev, mode); 1051 unlock_kernel(); 1052 1053 return ret; 1054} 1055 1056/* 1057 * Close. Sync first. 1058 */ 1059static int cciss_release(struct gendisk *disk, fmode_t mode) 1060{ 1061 ctlr_info_t *host; 1062 drive_info_struct *drv; 1063 1064 lock_kernel(); 1065 host = get_host(disk); 1066 drv = get_drv(disk); 1067 1068#ifdef CCISS_DEBUG 1069 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name); 1070#endif /* CCISS_DEBUG */ 1071 1072 drv->usage_count--; 1073 host->usage_count--; 1074 unlock_kernel(); 1075 return 0; 1076} 1077 1078static int do_ioctl(struct block_device *bdev, fmode_t mode, 1079 unsigned cmd, unsigned long arg) 1080{ 1081 int ret; 1082 lock_kernel(); 1083 ret = cciss_ioctl(bdev, mode, cmd, arg); 1084 unlock_kernel(); 1085 return ret; 1086} 1087 1088#ifdef CONFIG_COMPAT 1089 1090static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 1091 unsigned cmd, unsigned long arg); 1092static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 1093 unsigned cmd, unsigned long arg); 1094 1095static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode, 1096 unsigned cmd, unsigned long arg) 1097{ 1098 switch (cmd) { 1099 case CCISS_GETPCIINFO: 1100 case CCISS_GETINTINFO: 1101 case CCISS_SETINTINFO: 1102 case CCISS_GETNODENAME: 1103 case CCISS_SETNODENAME: 1104 case CCISS_GETHEARTBEAT: 1105 case CCISS_GETBUSTYPES: 1106 case CCISS_GETFIRMVER: 1107 case CCISS_GETDRIVVER: 1108 case CCISS_REVALIDVOLS: 1109 case CCISS_DEREGDISK: 1110 case CCISS_REGNEWDISK: 1111 case CCISS_REGNEWD: 1112 case CCISS_RESCANDISK: 1113 case CCISS_GETLUNINFO: 1114 return do_ioctl(bdev, mode, cmd, arg); 1115 1116 case CCISS_PASSTHRU32: 1117 return cciss_ioctl32_passthru(bdev, mode, cmd, arg); 1118 case CCISS_BIG_PASSTHRU32: 1119 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg); 1120 1121 default: 1122 return -ENOIOCTLCMD; 1123 } 1124} 1125 1126static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 1127 unsigned cmd, unsigned long arg) 1128{ 1129 IOCTL32_Command_struct __user *arg32 = 1130 (IOCTL32_Command_struct __user *) arg; 1131 IOCTL_Command_struct arg64; 1132 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); 1133 int err; 1134 u32 cp; 1135 1136 err = 0; 1137 err |= 1138 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 1139 sizeof(arg64.LUN_info)); 1140 err |= 1141 copy_from_user(&arg64.Request, &arg32->Request, 1142 sizeof(arg64.Request)); 1143 err |= 1144 copy_from_user(&arg64.error_info, &arg32->error_info, 1145 sizeof(arg64.error_info)); 1146 err |= get_user(arg64.buf_size, &arg32->buf_size); 1147 err |= get_user(cp, &arg32->buf); 1148 arg64.buf = compat_ptr(cp); 1149 err |= copy_to_user(p, &arg64, sizeof(arg64)); 1150 1151 if (err) 1152 return -EFAULT; 1153 1154 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p); 1155 if (err) 1156 return err; 1157 err |= 1158 copy_in_user(&arg32->error_info, &p->error_info, 1159 sizeof(arg32->error_info)); 1160 if (err) 1161 return -EFAULT; 1162 return err; 1163} 1164 1165static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 1166 unsigned cmd, unsigned long arg) 1167{ 1168 BIG_IOCTL32_Command_struct __user *arg32 = 1169 (BIG_IOCTL32_Command_struct __user *) arg; 1170 BIG_IOCTL_Command_struct arg64; 1171 BIG_IOCTL_Command_struct __user *p = 1172 compat_alloc_user_space(sizeof(arg64)); 1173 int err; 1174 u32 cp; 1175 1176 err = 0; 1177 err |= 1178 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 1179 sizeof(arg64.LUN_info)); 1180 err |= 1181 copy_from_user(&arg64.Request, &arg32->Request, 1182 sizeof(arg64.Request)); 1183 err |= 1184 copy_from_user(&arg64.error_info, &arg32->error_info, 1185 sizeof(arg64.error_info)); 1186 err |= get_user(arg64.buf_size, &arg32->buf_size); 1187 err |= get_user(arg64.malloc_size, &arg32->malloc_size); 1188 err |= get_user(cp, &arg32->buf); 1189 arg64.buf = compat_ptr(cp); 1190 err |= copy_to_user(p, &arg64, sizeof(arg64)); 1191 1192 if (err) 1193 return -EFAULT; 1194 1195 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p); 1196 if (err) 1197 return err; 1198 err |= 1199 copy_in_user(&arg32->error_info, &p->error_info, 1200 sizeof(arg32->error_info)); 1201 if (err) 1202 return -EFAULT; 1203 return err; 1204} 1205#endif 1206 1207static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1208{ 1209 drive_info_struct *drv = get_drv(bdev->bd_disk); 1210 1211 if (!drv->cylinders) 1212 return -ENXIO; 1213 1214 geo->heads = drv->heads; 1215 geo->sectors = drv->sectors; 1216 geo->cylinders = drv->cylinders; 1217 return 0; 1218} 1219 1220static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c) 1221{ 1222 if (c->err_info->CommandStatus == CMD_TARGET_STATUS && 1223 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) 1224 (void)check_for_unit_attention(host, c); 1225} 1226/* 1227 * ioctl 1228 */ 1229static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 1230 unsigned int cmd, unsigned long arg) 1231{ 1232 struct gendisk *disk = bdev->bd_disk; 1233 ctlr_info_t *host = get_host(disk); 1234 drive_info_struct *drv = get_drv(disk); 1235 int ctlr = host->ctlr; 1236 void __user *argp = (void __user *)arg; 1237 1238#ifdef CCISS_DEBUG 1239 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg); 1240#endif /* CCISS_DEBUG */ 1241 1242 switch (cmd) { 1243 case CCISS_GETPCIINFO: 1244 { 1245 cciss_pci_info_struct pciinfo; 1246 1247 if (!arg) 1248 return -EINVAL; 1249 pciinfo.domain = pci_domain_nr(host->pdev->bus); 1250 pciinfo.bus = host->pdev->bus->number; 1251 pciinfo.dev_fn = host->pdev->devfn; 1252 pciinfo.board_id = host->board_id; 1253 if (copy_to_user 1254 (argp, &pciinfo, sizeof(cciss_pci_info_struct))) 1255 return -EFAULT; 1256 return 0; 1257 } 1258 case CCISS_GETINTINFO: 1259 { 1260 cciss_coalint_struct intinfo; 1261 if (!arg) 1262 return -EINVAL; 1263 intinfo.delay = 1264 readl(&host->cfgtable->HostWrite.CoalIntDelay); 1265 intinfo.count = 1266 readl(&host->cfgtable->HostWrite.CoalIntCount); 1267 if (copy_to_user 1268 (argp, &intinfo, sizeof(cciss_coalint_struct))) 1269 return -EFAULT; 1270 return 0; 1271 } 1272 case CCISS_SETINTINFO: 1273 { 1274 cciss_coalint_struct intinfo; 1275 unsigned long flags; 1276 int i; 1277 1278 if (!arg) 1279 return -EINVAL; 1280 if (!capable(CAP_SYS_ADMIN)) 1281 return -EPERM; 1282 if (copy_from_user 1283 (&intinfo, argp, sizeof(cciss_coalint_struct))) 1284 return -EFAULT; 1285 if ((intinfo.delay == 0) && (intinfo.count == 0)) 1286 { 1287// printk("cciss_ioctl: delay and count cannot be 0\n"); 1288 return -EINVAL; 1289 } 1290 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1291 /* Update the field, and then ring the doorbell */ 1292 writel(intinfo.delay, 1293 &(host->cfgtable->HostWrite.CoalIntDelay)); 1294 writel(intinfo.count, 1295 &(host->cfgtable->HostWrite.CoalIntCount)); 1296 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1297 1298 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1299 if (!(readl(host->vaddr + SA5_DOORBELL) 1300 & CFGTBL_ChangeReq)) 1301 break; 1302 /* delay and try again */ 1303 udelay(1000); 1304 } 1305 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1306 if (i >= MAX_IOCTL_CONFIG_WAIT) 1307 return -EAGAIN; 1308 return 0; 1309 } 1310 case CCISS_GETNODENAME: 1311 { 1312 NodeName_type NodeName; 1313 int i; 1314 1315 if (!arg) 1316 return -EINVAL; 1317 for (i = 0; i < 16; i++) 1318 NodeName[i] = 1319 readb(&host->cfgtable->ServerName[i]); 1320 if (copy_to_user(argp, NodeName, sizeof(NodeName_type))) 1321 return -EFAULT; 1322 return 0; 1323 } 1324 case CCISS_SETNODENAME: 1325 { 1326 NodeName_type NodeName; 1327 unsigned long flags; 1328 int i; 1329 1330 if (!arg) 1331 return -EINVAL; 1332 if (!capable(CAP_SYS_ADMIN)) 1333 return -EPERM; 1334 1335 if (copy_from_user 1336 (NodeName, argp, sizeof(NodeName_type))) 1337 return -EFAULT; 1338 1339 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1340 1341 /* Update the field, and then ring the doorbell */ 1342 for (i = 0; i < 16; i++) 1343 writeb(NodeName[i], 1344 &host->cfgtable->ServerName[i]); 1345 1346 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1347 1348 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1349 if (!(readl(host->vaddr + SA5_DOORBELL) 1350 & CFGTBL_ChangeReq)) 1351 break; 1352 /* delay and try again */ 1353 udelay(1000); 1354 } 1355 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1356 if (i >= MAX_IOCTL_CONFIG_WAIT) 1357 return -EAGAIN; 1358 return 0; 1359 } 1360 1361 case CCISS_GETHEARTBEAT: 1362 { 1363 Heartbeat_type heartbeat; 1364 1365 if (!arg) 1366 return -EINVAL; 1367 heartbeat = readl(&host->cfgtable->HeartBeat); 1368 if (copy_to_user 1369 (argp, &heartbeat, sizeof(Heartbeat_type))) 1370 return -EFAULT; 1371 return 0; 1372 } 1373 case CCISS_GETBUSTYPES: 1374 { 1375 BusTypes_type BusTypes; 1376 1377 if (!arg) 1378 return -EINVAL; 1379 BusTypes = readl(&host->cfgtable->BusTypes); 1380 if (copy_to_user 1381 (argp, &BusTypes, sizeof(BusTypes_type))) 1382 return -EFAULT; 1383 return 0; 1384 } 1385 case CCISS_GETFIRMVER: 1386 { 1387 FirmwareVer_type firmware; 1388 1389 if (!arg) 1390 return -EINVAL; 1391 memcpy(firmware, host->firm_ver, 4); 1392 1393 if (copy_to_user 1394 (argp, firmware, sizeof(FirmwareVer_type))) 1395 return -EFAULT; 1396 return 0; 1397 } 1398 case CCISS_GETDRIVVER: 1399 { 1400 DriverVer_type DriverVer = DRIVER_VERSION; 1401 1402 if (!arg) 1403 return -EINVAL; 1404 1405 if (copy_to_user 1406 (argp, &DriverVer, sizeof(DriverVer_type))) 1407 return -EFAULT; 1408 return 0; 1409 } 1410 1411 case CCISS_DEREGDISK: 1412 case CCISS_REGNEWD: 1413 case CCISS_REVALIDVOLS: 1414 return rebuild_lun_table(host, 0, 1); 1415 1416 case CCISS_GETLUNINFO:{ 1417 LogvolInfo_struct luninfo; 1418 1419 memcpy(&luninfo.LunID, drv->LunID, 1420 sizeof(luninfo.LunID)); 1421 luninfo.num_opens = drv->usage_count; 1422 luninfo.num_parts = 0; 1423 if (copy_to_user(argp, &luninfo, 1424 sizeof(LogvolInfo_struct))) 1425 return -EFAULT; 1426 return 0; 1427 } 1428 case CCISS_PASSTHRU: 1429 { 1430 IOCTL_Command_struct iocommand; 1431 CommandList_struct *c; 1432 char *buff = NULL; 1433 u64bit temp64; 1434 DECLARE_COMPLETION_ONSTACK(wait); 1435 1436 if (!arg) 1437 return -EINVAL; 1438 1439 if (!capable(CAP_SYS_RAWIO)) 1440 return -EPERM; 1441 1442 if (copy_from_user 1443 (&iocommand, argp, sizeof(IOCTL_Command_struct))) 1444 return -EFAULT; 1445 if ((iocommand.buf_size < 1) && 1446 (iocommand.Request.Type.Direction != XFER_NONE)) { 1447 return -EINVAL; 1448 } 1449#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */ 1450 /* Check kmalloc limits */ 1451 if (iocommand.buf_size > 128000) 1452 return -EINVAL; 1453#endif 1454 if (iocommand.buf_size > 0) { 1455 buff = kmalloc(iocommand.buf_size, GFP_KERNEL); 1456 if (buff == NULL) 1457 return -EFAULT; 1458 } 1459 if (iocommand.Request.Type.Direction == XFER_WRITE) { 1460 /* Copy the data into the buffer we created */ 1461 if (copy_from_user 1462 (buff, iocommand.buf, iocommand.buf_size)) { 1463 kfree(buff); 1464 return -EFAULT; 1465 } 1466 } else { 1467 memset(buff, 0, iocommand.buf_size); 1468 } 1469 if ((c = cmd_alloc(host, 0)) == NULL) { 1470 kfree(buff); 1471 return -ENOMEM; 1472 } 1473 /* Fill in the command type */ 1474 c->cmd_type = CMD_IOCTL_PEND; 1475 /* Fill in Command Header */ 1476 c->Header.ReplyQueue = 0; /* unused in simple mode */ 1477 if (iocommand.buf_size > 0) /* buffer to fill */ 1478 { 1479 c->Header.SGList = 1; 1480 c->Header.SGTotal = 1; 1481 } else /* no buffers to fill */ 1482 { 1483 c->Header.SGList = 0; 1484 c->Header.SGTotal = 0; 1485 } 1486 c->Header.LUN = iocommand.LUN_info; 1487 /* use the kernel address the cmd block for tag */ 1488 c->Header.Tag.lower = c->busaddr; 1489 1490 /* Fill in Request block */ 1491 c->Request = iocommand.Request; 1492 1493 /* Fill in the scatter gather information */ 1494 if (iocommand.buf_size > 0) { 1495 temp64.val = pci_map_single(host->pdev, buff, 1496 iocommand.buf_size, 1497 PCI_DMA_BIDIRECTIONAL); 1498 c->SG[0].Addr.lower = temp64.val32.lower; 1499 c->SG[0].Addr.upper = temp64.val32.upper; 1500 c->SG[0].Len = iocommand.buf_size; 1501 c->SG[0].Ext = 0; /* we are not chaining */ 1502 } 1503 c->waiting = &wait; 1504 1505 enqueue_cmd_and_start_io(host, c); 1506 wait_for_completion(&wait); 1507 1508 /* unlock the buffers from DMA */ 1509 temp64.val32.lower = c->SG[0].Addr.lower; 1510 temp64.val32.upper = c->SG[0].Addr.upper; 1511 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val, 1512 iocommand.buf_size, 1513 PCI_DMA_BIDIRECTIONAL); 1514 1515 check_ioctl_unit_attention(host, c); 1516 1517 /* Copy the error information out */ 1518 iocommand.error_info = *(c->err_info); 1519 if (copy_to_user 1520 (argp, &iocommand, sizeof(IOCTL_Command_struct))) { 1521 kfree(buff); 1522 cmd_free(host, c, 0); 1523 return -EFAULT; 1524 } 1525 1526 if (iocommand.Request.Type.Direction == XFER_READ) { 1527 /* Copy the data out of the buffer we created */ 1528 if (copy_to_user 1529 (iocommand.buf, buff, iocommand.buf_size)) { 1530 kfree(buff); 1531 cmd_free(host, c, 0); 1532 return -EFAULT; 1533 } 1534 } 1535 kfree(buff); 1536 cmd_free(host, c, 0); 1537 return 0; 1538 } 1539 case CCISS_BIG_PASSTHRU:{ 1540 BIG_IOCTL_Command_struct *ioc; 1541 CommandList_struct *c; 1542 unsigned char **buff = NULL; 1543 int *buff_size = NULL; 1544 u64bit temp64; 1545 BYTE sg_used = 0; 1546 int status = 0; 1547 int i; 1548 DECLARE_COMPLETION_ONSTACK(wait); 1549 __u32 left; 1550 __u32 sz; 1551 BYTE __user *data_ptr; 1552 1553 if (!arg) 1554 return -EINVAL; 1555 if (!capable(CAP_SYS_RAWIO)) 1556 return -EPERM; 1557 ioc = (BIG_IOCTL_Command_struct *) 1558 kmalloc(sizeof(*ioc), GFP_KERNEL); 1559 if (!ioc) { 1560 status = -ENOMEM; 1561 goto cleanup1; 1562 } 1563 if (copy_from_user(ioc, argp, sizeof(*ioc))) { 1564 status = -EFAULT; 1565 goto cleanup1; 1566 } 1567 if ((ioc->buf_size < 1) && 1568 (ioc->Request.Type.Direction != XFER_NONE)) { 1569 status = -EINVAL; 1570 goto cleanup1; 1571 } 1572 /* Check kmalloc limits using all SGs */ 1573 if (ioc->malloc_size > MAX_KMALLOC_SIZE) { 1574 status = -EINVAL; 1575 goto cleanup1; 1576 } 1577 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { 1578 status = -EINVAL; 1579 goto cleanup1; 1580 } 1581 buff = 1582 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); 1583 if (!buff) { 1584 status = -ENOMEM; 1585 goto cleanup1; 1586 } 1587 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), 1588 GFP_KERNEL); 1589 if (!buff_size) { 1590 status = -ENOMEM; 1591 goto cleanup1; 1592 } 1593 left = ioc->buf_size; 1594 data_ptr = ioc->buf; 1595 while (left) { 1596 sz = (left > 1597 ioc->malloc_size) ? ioc-> 1598 malloc_size : left; 1599 buff_size[sg_used] = sz; 1600 buff[sg_used] = kmalloc(sz, GFP_KERNEL); 1601 if (buff[sg_used] == NULL) { 1602 status = -ENOMEM; 1603 goto cleanup1; 1604 } 1605 if (ioc->Request.Type.Direction == XFER_WRITE) { 1606 if (copy_from_user 1607 (buff[sg_used], data_ptr, sz)) { 1608 status = -EFAULT; 1609 goto cleanup1; 1610 } 1611 } else { 1612 memset(buff[sg_used], 0, sz); 1613 } 1614 left -= sz; 1615 data_ptr += sz; 1616 sg_used++; 1617 } 1618 if ((c = cmd_alloc(host, 0)) == NULL) { 1619 status = -ENOMEM; 1620 goto cleanup1; 1621 } 1622 c->cmd_type = CMD_IOCTL_PEND; 1623 c->Header.ReplyQueue = 0; 1624 1625 if (ioc->buf_size > 0) { 1626 c->Header.SGList = sg_used; 1627 c->Header.SGTotal = sg_used; 1628 } else { 1629 c->Header.SGList = 0; 1630 c->Header.SGTotal = 0; 1631 } 1632 c->Header.LUN = ioc->LUN_info; 1633 c->Header.Tag.lower = c->busaddr; 1634 1635 c->Request = ioc->Request; 1636 if (ioc->buf_size > 0) { 1637 for (i = 0; i < sg_used; i++) { 1638 temp64.val = 1639 pci_map_single(host->pdev, buff[i], 1640 buff_size[i], 1641 PCI_DMA_BIDIRECTIONAL); 1642 c->SG[i].Addr.lower = 1643 temp64.val32.lower; 1644 c->SG[i].Addr.upper = 1645 temp64.val32.upper; 1646 c->SG[i].Len = buff_size[i]; 1647 c->SG[i].Ext = 0; /* we are not chaining */ 1648 } 1649 } 1650 c->waiting = &wait; 1651 enqueue_cmd_and_start_io(host, c); 1652 wait_for_completion(&wait); 1653 /* unlock the buffers from DMA */ 1654 for (i = 0; i < sg_used; i++) { 1655 temp64.val32.lower = c->SG[i].Addr.lower; 1656 temp64.val32.upper = c->SG[i].Addr.upper; 1657 pci_unmap_single(host->pdev, 1658 (dma_addr_t) temp64.val, buff_size[i], 1659 PCI_DMA_BIDIRECTIONAL); 1660 } 1661 check_ioctl_unit_attention(host, c); 1662 /* Copy the error information out */ 1663 ioc->error_info = *(c->err_info); 1664 if (copy_to_user(argp, ioc, sizeof(*ioc))) { 1665 cmd_free(host, c, 0); 1666 status = -EFAULT; 1667 goto cleanup1; 1668 } 1669 if (ioc->Request.Type.Direction == XFER_READ) { 1670 /* Copy the data out of the buffer we created */ 1671 BYTE __user *ptr = ioc->buf; 1672 for (i = 0; i < sg_used; i++) { 1673 if (copy_to_user 1674 (ptr, buff[i], buff_size[i])) { 1675 cmd_free(host, c, 0); 1676 status = -EFAULT; 1677 goto cleanup1; 1678 } 1679 ptr += buff_size[i]; 1680 } 1681 } 1682 cmd_free(host, c, 0); 1683 status = 0; 1684 cleanup1: 1685 if (buff) { 1686 for (i = 0; i < sg_used; i++) 1687 kfree(buff[i]); 1688 kfree(buff); 1689 } 1690 kfree(buff_size); 1691 kfree(ioc); 1692 return status; 1693 } 1694 1695 /* scsi_cmd_ioctl handles these, below, though some are not */ 1696 /* very meaningful for cciss. SG_IO is the main one people want. */ 1697 1698 case SG_GET_VERSION_NUM: 1699 case SG_SET_TIMEOUT: 1700 case SG_GET_TIMEOUT: 1701 case SG_GET_RESERVED_SIZE: 1702 case SG_SET_RESERVED_SIZE: 1703 case SG_EMULATED_HOST: 1704 case SG_IO: 1705 case SCSI_IOCTL_SEND_COMMAND: 1706 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); 1707 1708 /* scsi_cmd_ioctl would normally handle these, below, but */ 1709 /* they aren't a good fit for cciss, as CD-ROMs are */ 1710 /* not supported, and we don't have any bus/target/lun */ 1711 /* which we present to the kernel. */ 1712 1713 case CDROM_SEND_PACKET: 1714 case CDROMCLOSETRAY: 1715 case CDROMEJECT: 1716 case SCSI_IOCTL_GET_IDLUN: 1717 case SCSI_IOCTL_GET_BUS_NUMBER: 1718 default: 1719 return -ENOTTY; 1720 } 1721} 1722 1723static void cciss_check_queues(ctlr_info_t *h) 1724{ 1725 int start_queue = h->next_to_run; 1726 int i; 1727 1728 /* check to see if we have maxed out the number of commands that can 1729 * be placed on the queue. If so then exit. We do this check here 1730 * in case the interrupt we serviced was from an ioctl and did not 1731 * free any new commands. 1732 */ 1733 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) 1734 return; 1735 1736 /* We have room on the queue for more commands. Now we need to queue 1737 * them up. We will also keep track of the next queue to run so 1738 * that every queue gets a chance to be started first. 1739 */ 1740 for (i = 0; i < h->highest_lun + 1; i++) { 1741 int curr_queue = (start_queue + i) % (h->highest_lun + 1); 1742 /* make sure the disk has been added and the drive is real 1743 * because this can be called from the middle of init_one. 1744 */ 1745 if (!h->drv[curr_queue]) 1746 continue; 1747 if (!(h->drv[curr_queue]->queue) || 1748 !(h->drv[curr_queue]->heads)) 1749 continue; 1750 blk_start_queue(h->gendisk[curr_queue]->queue); 1751 1752 /* check to see if we have maxed out the number of commands 1753 * that can be placed on the queue. 1754 */ 1755 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) { 1756 if (curr_queue == start_queue) { 1757 h->next_to_run = 1758 (start_queue + 1) % (h->highest_lun + 1); 1759 break; 1760 } else { 1761 h->next_to_run = curr_queue; 1762 break; 1763 } 1764 } 1765 } 1766} 1767 1768static void cciss_softirq_done(struct request *rq) 1769{ 1770 CommandList_struct *cmd = rq->completion_data; 1771 ctlr_info_t *h = hba[cmd->ctlr]; 1772 SGDescriptor_struct *curr_sg = cmd->SG; 1773 u64bit temp64; 1774 unsigned long flags; 1775 int i, ddir; 1776 int sg_index = 0; 1777 1778 if (cmd->Request.Type.Direction == XFER_READ) 1779 ddir = PCI_DMA_FROMDEVICE; 1780 else 1781 ddir = PCI_DMA_TODEVICE; 1782 1783 /* command did not need to be retried */ 1784 /* unmap the DMA mapping for all the scatter gather elements */ 1785 for (i = 0; i < cmd->Header.SGList; i++) { 1786 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) { 1787 cciss_unmap_sg_chain_block(h, cmd); 1788 /* Point to the next block */ 1789 curr_sg = h->cmd_sg_list[cmd->cmdindex]; 1790 sg_index = 0; 1791 } 1792 temp64.val32.lower = curr_sg[sg_index].Addr.lower; 1793 temp64.val32.upper = curr_sg[sg_index].Addr.upper; 1794 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len, 1795 ddir); 1796 ++sg_index; 1797 } 1798 1799#ifdef CCISS_DEBUG 1800 printk("Done with %p\n", rq); 1801#endif /* CCISS_DEBUG */ 1802 1803 /* set the residual count for pc requests */ 1804 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) 1805 rq->resid_len = cmd->err_info->ResidualCnt; 1806 1807 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO); 1808 1809 spin_lock_irqsave(&h->lock, flags); 1810 cmd_free(h, cmd, 1); 1811 cciss_check_queues(h); 1812 spin_unlock_irqrestore(&h->lock, flags); 1813} 1814 1815static inline void log_unit_to_scsi3addr(ctlr_info_t *h, 1816 unsigned char scsi3addr[], uint32_t log_unit) 1817{ 1818 memcpy(scsi3addr, h->drv[log_unit]->LunID, 1819 sizeof(h->drv[log_unit]->LunID)); 1820} 1821 1822/* This function gets the SCSI vendor, model, and revision of a logical drive 1823 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if 1824 * they cannot be read. 1825 */ 1826static void cciss_get_device_descr(int ctlr, int logvol, 1827 char *vendor, char *model, char *rev) 1828{ 1829 int rc; 1830 InquiryData_struct *inq_buf; 1831 unsigned char scsi3addr[8]; 1832 1833 *vendor = '\0'; 1834 *model = '\0'; 1835 *rev = '\0'; 1836 1837 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1838 if (!inq_buf) 1839 return; 1840 1841 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1842 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0, 1843 scsi3addr, TYPE_CMD); 1844 if (rc == IO_OK) { 1845 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN); 1846 vendor[VENDOR_LEN] = '\0'; 1847 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN); 1848 model[MODEL_LEN] = '\0'; 1849 memcpy(rev, &inq_buf->data_byte[32], REV_LEN); 1850 rev[REV_LEN] = '\0'; 1851 } 1852 1853 kfree(inq_buf); 1854 return; 1855} 1856 1857/* This function gets the serial number of a logical drive via 1858 * inquiry page 0x83. Serial no. is 16 bytes. If the serial 1859 * number cannot be had, for whatever reason, 16 bytes of 0xff 1860 * are returned instead. 1861 */ 1862static void cciss_get_serial_no(int ctlr, int logvol, 1863 unsigned char *serial_no, int buflen) 1864{ 1865#define PAGE_83_INQ_BYTES 64 1866 int rc; 1867 unsigned char *buf; 1868 unsigned char scsi3addr[8]; 1869 1870 if (buflen > 16) 1871 buflen = 16; 1872 memset(serial_no, 0xff, buflen); 1873 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); 1874 if (!buf) 1875 return; 1876 memset(serial_no, 0, buflen); 1877 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1878 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf, 1879 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); 1880 if (rc == IO_OK) 1881 memcpy(serial_no, &buf[8], buflen); 1882 kfree(buf); 1883 return; 1884} 1885 1886/* 1887 * cciss_add_disk sets up the block device queue for a logical drive 1888 */ 1889static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, 1890 int drv_index) 1891{ 1892 disk->queue = blk_init_queue(do_cciss_request, &h->lock); 1893 if (!disk->queue) 1894 goto init_queue_failure; 1895 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index); 1896 disk->major = h->major; 1897 disk->first_minor = drv_index << NWD_SHIFT; 1898 disk->fops = &cciss_fops; 1899 if (cciss_create_ld_sysfs_entry(h, drv_index)) 1900 goto cleanup_queue; 1901 disk->private_data = h->drv[drv_index]; 1902 disk->driverfs_dev = &h->drv[drv_index]->dev; 1903 1904 /* Set up queue information */ 1905 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); 1906 1907 /* This is a hardware imposed limit. */ 1908 blk_queue_max_segments(disk->queue, h->maxsgentries); 1909 1910 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors); 1911 1912 blk_queue_softirq_done(disk->queue, cciss_softirq_done); 1913 1914 disk->queue->queuedata = h; 1915 1916 blk_queue_logical_block_size(disk->queue, 1917 h->drv[drv_index]->block_size); 1918 1919 /* Make sure all queue data is written out before */ 1920 /* setting h->drv[drv_index]->queue, as setting this */ 1921 /* allows the interrupt handler to start the queue */ 1922 wmb(); 1923 h->drv[drv_index]->queue = disk->queue; 1924 add_disk(disk); 1925 return 0; 1926 1927cleanup_queue: 1928 blk_cleanup_queue(disk->queue); 1929 disk->queue = NULL; 1930init_queue_failure: 1931 return -1; 1932} 1933 1934/* This function will check the usage_count of the drive to be updated/added. 1935 * If the usage_count is zero and it is a heretofore unknown drive, or, 1936 * the drive's capacity, geometry, or serial number has changed, 1937 * then the drive information will be updated and the disk will be 1938 * re-registered with the kernel. If these conditions don't hold, 1939 * then it will be left alone for the next reboot. The exception to this 1940 * is disk 0 which will always be left registered with the kernel since it 1941 * is also the controller node. Any changes to disk 0 will show up on 1942 * the next reboot. 1943 */ 1944static void cciss_update_drive_info(int ctlr, int drv_index, int first_time, 1945 int via_ioctl) 1946{ 1947 ctlr_info_t *h = hba[ctlr]; 1948 struct gendisk *disk; 1949 InquiryData_struct *inq_buff = NULL; 1950 unsigned int block_size; 1951 sector_t total_size; 1952 unsigned long flags = 0; 1953 int ret = 0; 1954 drive_info_struct *drvinfo; 1955 1956 /* Get information about the disk and modify the driver structure */ 1957 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1958 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL); 1959 if (inq_buff == NULL || drvinfo == NULL) 1960 goto mem_msg; 1961 1962 /* testing to see if 16-byte CDBs are already being used */ 1963 if (h->cciss_read == CCISS_READ_16) { 1964 cciss_read_capacity_16(h->ctlr, drv_index, 1965 &total_size, &block_size); 1966 1967 } else { 1968 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size); 1969 /* if read_capacity returns all F's this volume is >2TB */ 1970 /* in size so we switch to 16-byte CDB's for all */ 1971 /* read/write ops */ 1972 if (total_size == 0xFFFFFFFFULL) { 1973 cciss_read_capacity_16(ctlr, drv_index, 1974 &total_size, &block_size); 1975 h->cciss_read = CCISS_READ_16; 1976 h->cciss_write = CCISS_WRITE_16; 1977 } else { 1978 h->cciss_read = CCISS_READ_10; 1979 h->cciss_write = CCISS_WRITE_10; 1980 } 1981 } 1982 1983 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size, 1984 inq_buff, drvinfo); 1985 drvinfo->block_size = block_size; 1986 drvinfo->nr_blocks = total_size + 1; 1987 1988 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor, 1989 drvinfo->model, drvinfo->rev); 1990 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no, 1991 sizeof(drvinfo->serial_no)); 1992 /* Save the lunid in case we deregister the disk, below. */ 1993 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID, 1994 sizeof(drvinfo->LunID)); 1995 1996 /* Is it the same disk we already know, and nothing's changed? */ 1997 if (h->drv[drv_index]->raid_level != -1 && 1998 ((memcmp(drvinfo->serial_no, 1999 h->drv[drv_index]->serial_no, 16) == 0) && 2000 drvinfo->block_size == h->drv[drv_index]->block_size && 2001 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks && 2002 drvinfo->heads == h->drv[drv_index]->heads && 2003 drvinfo->sectors == h->drv[drv_index]->sectors && 2004 drvinfo->cylinders == h->drv[drv_index]->cylinders)) 2005 /* The disk is unchanged, nothing to update */ 2006 goto freeret; 2007 2008 /* If we get here it's not the same disk, or something's changed, 2009 * so we need to * deregister it, and re-register it, if it's not 2010 * in use. 2011 * If the disk already exists then deregister it before proceeding 2012 * (unless it's the first disk (for the controller node). 2013 */ 2014 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) { 2015 printk(KERN_WARNING "disk %d has changed.\n", drv_index); 2016 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2017 h->drv[drv_index]->busy_configuring = 1; 2018 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2019 2020 /* deregister_disk sets h->drv[drv_index]->queue = NULL 2021 * which keeps the interrupt handler from starting 2022 * the queue. 2023 */ 2024 ret = deregister_disk(h, drv_index, 0, via_ioctl); 2025 } 2026 2027 /* If the disk is in use return */ 2028 if (ret) 2029 goto freeret; 2030 2031 /* Save the new information from cciss_geometry_inquiry 2032 * and serial number inquiry. If the disk was deregistered 2033 * above, then h->drv[drv_index] will be NULL. 2034 */ 2035 if (h->drv[drv_index] == NULL) { 2036 drvinfo->device_initialized = 0; 2037 h->drv[drv_index] = drvinfo; 2038 drvinfo = NULL; /* so it won't be freed below. */ 2039 } else { 2040 /* special case for cxd0 */ 2041 h->drv[drv_index]->block_size = drvinfo->block_size; 2042 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks; 2043 h->drv[drv_index]->heads = drvinfo->heads; 2044 h->drv[drv_index]->sectors = drvinfo->sectors; 2045 h->drv[drv_index]->cylinders = drvinfo->cylinders; 2046 h->drv[drv_index]->raid_level = drvinfo->raid_level; 2047 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16); 2048 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor, 2049 VENDOR_LEN + 1); 2050 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1); 2051 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1); 2052 } 2053 2054 ++h->num_luns; 2055 disk = h->gendisk[drv_index]; 2056 set_capacity(disk, h->drv[drv_index]->nr_blocks); 2057 2058 /* If it's not disk 0 (drv_index != 0) 2059 * or if it was disk 0, but there was previously 2060 * no actual corresponding configured logical drive 2061 * (raid_leve == -1) then we want to update the 2062 * logical drive's information. 2063 */ 2064 if (drv_index || first_time) { 2065 if (cciss_add_disk(h, disk, drv_index) != 0) { 2066 cciss_free_gendisk(h, drv_index); 2067 cciss_free_drive_info(h, drv_index); 2068 printk(KERN_WARNING "cciss:%d could not update " 2069 "disk %d\n", h->ctlr, drv_index); 2070 --h->num_luns; 2071 } 2072 } 2073 2074freeret: 2075 kfree(inq_buff); 2076 kfree(drvinfo); 2077 return; 2078mem_msg: 2079 printk(KERN_ERR "cciss: out of memory\n"); 2080 goto freeret; 2081} 2082 2083/* This function will find the first index of the controllers drive array 2084 * that has a null drv pointer and allocate the drive info struct and 2085 * will return that index This is where new drives will be added. 2086 * If the index to be returned is greater than the highest_lun index for 2087 * the controller then highest_lun is set * to this new index. 2088 * If there are no available indexes or if tha allocation fails, then -1 2089 * is returned. * "controller_node" is used to know if this is a real 2090 * logical drive, or just the controller node, which determines if this 2091 * counts towards highest_lun. 2092 */ 2093static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node) 2094{ 2095 int i; 2096 drive_info_struct *drv; 2097 2098 /* Search for an empty slot for our drive info */ 2099 for (i = 0; i < CISS_MAX_LUN; i++) { 2100 2101 /* if not cxd0 case, and it's occupied, skip it. */ 2102 if (h->drv[i] && i != 0) 2103 continue; 2104 /* 2105 * If it's cxd0 case, and drv is alloc'ed already, and a 2106 * disk is configured there, skip it. 2107 */ 2108 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1) 2109 continue; 2110 2111 /* 2112 * We've found an empty slot. Update highest_lun 2113 * provided this isn't just the fake cxd0 controller node. 2114 */ 2115 if (i > h->highest_lun && !controller_node) 2116 h->highest_lun = i; 2117 2118 /* If adding a real disk at cxd0, and it's already alloc'ed */ 2119 if (i == 0 && h->drv[i] != NULL) 2120 return i; 2121 2122 /* 2123 * Found an empty slot, not already alloc'ed. Allocate it. 2124 * Mark it with raid_level == -1, so we know it's new later on. 2125 */ 2126 drv = kzalloc(sizeof(*drv), GFP_KERNEL); 2127 if (!drv) 2128 return -1; 2129 drv->raid_level = -1; /* so we know it's new */ 2130 h->drv[i] = drv; 2131 return i; 2132 } 2133 return -1; 2134} 2135 2136static void cciss_free_drive_info(ctlr_info_t *h, int drv_index) 2137{ 2138 kfree(h->drv[drv_index]); 2139 h->drv[drv_index] = NULL; 2140} 2141 2142static void cciss_free_gendisk(ctlr_info_t *h, int drv_index) 2143{ 2144 put_disk(h->gendisk[drv_index]); 2145 h->gendisk[drv_index] = NULL; 2146} 2147 2148/* cciss_add_gendisk finds a free hba[]->drv structure 2149 * and allocates a gendisk if needed, and sets the lunid 2150 * in the drvinfo structure. It returns the index into 2151 * the ->drv[] array, or -1 if none are free. 2152 * is_controller_node indicates whether highest_lun should 2153 * count this disk, or if it's only being added to provide 2154 * a means to talk to the controller in case no logical 2155 * drives have yet been configured. 2156 */ 2157static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[], 2158 int controller_node) 2159{ 2160 int drv_index; 2161 2162 drv_index = cciss_alloc_drive_info(h, controller_node); 2163 if (drv_index == -1) 2164 return -1; 2165 2166 /*Check if the gendisk needs to be allocated */ 2167 if (!h->gendisk[drv_index]) { 2168 h->gendisk[drv_index] = 2169 alloc_disk(1 << NWD_SHIFT); 2170 if (!h->gendisk[drv_index]) { 2171 printk(KERN_ERR "cciss%d: could not " 2172 "allocate a new disk %d\n", 2173 h->ctlr, drv_index); 2174 goto err_free_drive_info; 2175 } 2176 } 2177 memcpy(h->drv[drv_index]->LunID, lunid, 2178 sizeof(h->drv[drv_index]->LunID)); 2179 if (cciss_create_ld_sysfs_entry(h, drv_index)) 2180 goto err_free_disk; 2181 /* Don't need to mark this busy because nobody */ 2182 /* else knows about this disk yet to contend */ 2183 /* for access to it. */ 2184 h->drv[drv_index]->busy_configuring = 0; 2185 wmb(); 2186 return drv_index; 2187 2188err_free_disk: 2189 cciss_free_gendisk(h, drv_index); 2190err_free_drive_info: 2191 cciss_free_drive_info(h, drv_index); 2192 return -1; 2193} 2194 2195/* This is for the special case of a controller which 2196 * has no logical drives. In this case, we still need 2197 * to register a disk so the controller can be accessed 2198 * by the Array Config Utility. 2199 */ 2200static void cciss_add_controller_node(ctlr_info_t *h) 2201{ 2202 struct gendisk *disk; 2203 int drv_index; 2204 2205 if (h->gendisk[0] != NULL) /* already did this? Then bail. */ 2206 return; 2207 2208 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1); 2209 if (drv_index == -1) 2210 goto error; 2211 h->drv[drv_index]->block_size = 512; 2212 h->drv[drv_index]->nr_blocks = 0; 2213 h->drv[drv_index]->heads = 0; 2214 h->drv[drv_index]->sectors = 0; 2215 h->drv[drv_index]->cylinders = 0; 2216 h->drv[drv_index]->raid_level = -1; 2217 memset(h->drv[drv_index]->serial_no, 0, 16); 2218 disk = h->gendisk[drv_index]; 2219 if (cciss_add_disk(h, disk, drv_index) == 0) 2220 return; 2221 cciss_free_gendisk(h, drv_index); 2222 cciss_free_drive_info(h, drv_index); 2223error: 2224 printk(KERN_WARNING "cciss%d: could not " 2225 "add disk 0.\n", h->ctlr); 2226 return; 2227} 2228 2229/* This function will add and remove logical drives from the Logical 2230 * drive array of the controller and maintain persistency of ordering 2231 * so that mount points are preserved until the next reboot. This allows 2232 * for the removal of logical drives in the middle of the drive array 2233 * without a re-ordering of those drives. 2234 * INPUT 2235 * h = The controller to perform the operations on 2236 */ 2237static int rebuild_lun_table(ctlr_info_t *h, int first_time, 2238 int via_ioctl) 2239{ 2240 int ctlr = h->ctlr; 2241 int num_luns; 2242 ReportLunData_struct *ld_buff = NULL; 2243 int return_code; 2244 int listlength = 0; 2245 int i; 2246 int drv_found; 2247 int drv_index = 0; 2248 unsigned char lunid[8] = CTLR_LUNID; 2249 unsigned long flags; 2250 2251 if (!capable(CAP_SYS_RAWIO)) 2252 return -EPERM; 2253 2254 /* Set busy_configuring flag for this operation */ 2255 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2256 if (h->busy_configuring) { 2257 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2258 return -EBUSY; 2259 } 2260 h->busy_configuring = 1; 2261 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2262 2263 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); 2264 if (ld_buff == NULL) 2265 goto mem_msg; 2266 2267 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff, 2268 sizeof(ReportLunData_struct), 2269 0, CTLR_LUNID, TYPE_CMD); 2270 2271 if (return_code == IO_OK) 2272 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); 2273 else { /* reading number of logical volumes failed */ 2274 printk(KERN_WARNING "cciss: report logical volume" 2275 " command failed\n"); 2276 listlength = 0; 2277 goto freeret; 2278 } 2279 2280 num_luns = listlength / 8; /* 8 bytes per entry */ 2281 if (num_luns > CISS_MAX_LUN) { 2282 num_luns = CISS_MAX_LUN; 2283 printk(KERN_WARNING "cciss: more luns configured" 2284 " on controller than can be handled by" 2285 " this driver.\n"); 2286 } 2287 2288 if (num_luns == 0) 2289 cciss_add_controller_node(h); 2290 2291 /* Compare controller drive array to driver's drive array 2292 * to see if any drives are missing on the controller due 2293 * to action of Array Config Utility (user deletes drive) 2294 * and deregister logical drives which have disappeared. 2295 */ 2296 for (i = 0; i <= h->highest_lun; i++) { 2297 int j; 2298 drv_found = 0; 2299 2300 /* skip holes in the array from already deleted drives */ 2301 if (h->drv[i] == NULL) 2302 continue; 2303 2304 for (j = 0; j < num_luns; j++) { 2305 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid)); 2306 if (memcmp(h->drv[i]->LunID, lunid, 2307 sizeof(lunid)) == 0) { 2308 drv_found = 1; 2309 break; 2310 } 2311 } 2312 if (!drv_found) { 2313 /* Deregister it from the OS, it's gone. */ 2314 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2315 h->drv[i]->busy_configuring = 1; 2316 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2317 return_code = deregister_disk(h, i, 1, via_ioctl); 2318 if (h->drv[i] != NULL) 2319 h->drv[i]->busy_configuring = 0; 2320 } 2321 } 2322 2323 /* Compare controller drive array to driver's drive array. 2324 * Check for updates in the drive information and any new drives 2325 * on the controller due to ACU adding logical drives, or changing 2326 * a logical drive's size, etc. Reregister any new/changed drives 2327 */ 2328 for (i = 0; i < num_luns; i++) { 2329 int j; 2330 2331 drv_found = 0; 2332 2333 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid)); 2334 /* Find if the LUN is already in the drive array 2335 * of the driver. If so then update its info 2336 * if not in use. If it does not exist then find 2337 * the first free index and add it. 2338 */ 2339 for (j = 0; j <= h->highest_lun; j++) { 2340 if (h->drv[j] != NULL && 2341 memcmp(h->drv[j]->LunID, lunid, 2342 sizeof(h->drv[j]->LunID)) == 0) { 2343 drv_index = j; 2344 drv_found = 1; 2345 break; 2346 } 2347 } 2348 2349 /* check if the drive was found already in the array */ 2350 if (!drv_found) { 2351 drv_index = cciss_add_gendisk(h, lunid, 0); 2352 if (drv_index == -1) 2353 goto freeret; 2354 } 2355 cciss_update_drive_info(ctlr, drv_index, first_time, 2356 via_ioctl); 2357 } /* end for */ 2358 2359freeret: 2360 kfree(ld_buff); 2361 h->busy_configuring = 0; 2362 /* We return -1 here to tell the ACU that we have registered/updated 2363 * all of the drives that we can and to keep it from calling us 2364 * additional times. 2365 */ 2366 return -1; 2367mem_msg: 2368 printk(KERN_ERR "cciss: out of memory\n"); 2369 h->busy_configuring = 0; 2370 goto freeret; 2371} 2372 2373static void cciss_clear_drive_info(drive_info_struct *drive_info) 2374{ 2375 /* zero out the disk size info */ 2376 drive_info->nr_blocks = 0; 2377 drive_info->block_size = 0; 2378 drive_info->heads = 0; 2379 drive_info->sectors = 0; 2380 drive_info->cylinders = 0; 2381 drive_info->raid_level = -1; 2382 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no)); 2383 memset(drive_info->model, 0, sizeof(drive_info->model)); 2384 memset(drive_info->rev, 0, sizeof(drive_info->rev)); 2385 memset(drive_info->vendor, 0, sizeof(drive_info->vendor)); 2386 /* 2387 * don't clear the LUNID though, we need to remember which 2388 * one this one is. 2389 */ 2390} 2391 2392/* This function will deregister the disk and it's queue from the 2393 * kernel. It must be called with the controller lock held and the 2394 * drv structures busy_configuring flag set. It's parameters are: 2395 * 2396 * disk = This is the disk to be deregistered 2397 * drv = This is the drive_info_struct associated with the disk to be 2398 * deregistered. It contains information about the disk used 2399 * by the driver. 2400 * clear_all = This flag determines whether or not the disk information 2401 * is going to be completely cleared out and the highest_lun 2402 * reset. Sometimes we want to clear out information about 2403 * the disk in preparation for re-adding it. In this case 2404 * the highest_lun should be left unchanged and the LunID 2405 * should not be cleared. 2406 * via_ioctl 2407 * This indicates whether we've reached this path via ioctl. 2408 * This affects the maximum usage count allowed for c0d0 to be messed with. 2409 * If this path is reached via ioctl(), then the max_usage_count will 2410 * be 1, as the process calling ioctl() has got to have the device open. 2411 * If we get here via sysfs, then the max usage count will be zero. 2412*/ 2413static int deregister_disk(ctlr_info_t *h, int drv_index, 2414 int clear_all, int via_ioctl) 2415{ 2416 int i; 2417 struct gendisk *disk; 2418 drive_info_struct *drv; 2419 int recalculate_highest_lun; 2420 2421 if (!capable(CAP_SYS_RAWIO)) 2422 return -EPERM; 2423 2424 drv = h->drv[drv_index]; 2425 disk = h->gendisk[drv_index]; 2426 2427 /* make sure logical volume is NOT is use */ 2428 if (clear_all || (h->gendisk[0] == disk)) { 2429 if (drv->usage_count > via_ioctl) 2430 return -EBUSY; 2431 } else if (drv->usage_count > 0) 2432 return -EBUSY; 2433 2434 recalculate_highest_lun = (drv == h->drv[h->highest_lun]); 2435 2436 /* invalidate the devices and deregister the disk. If it is disk 2437 * zero do not deregister it but just zero out it's values. This 2438 * allows us to delete disk zero but keep the controller registered. 2439 */ 2440 if (h->gendisk[0] != disk) { 2441 struct request_queue *q = disk->queue; 2442 if (disk->flags & GENHD_FL_UP) { 2443 cciss_destroy_ld_sysfs_entry(h, drv_index, 0); 2444 del_gendisk(disk); 2445 } 2446 if (q) 2447 blk_cleanup_queue(q); 2448 /* If clear_all is set then we are deleting the logical 2449 * drive, not just refreshing its info. For drives 2450 * other than disk 0 we will call put_disk. We do not 2451 * do this for disk 0 as we need it to be able to 2452 * configure the controller. 2453 */ 2454 if (clear_all){ 2455 /* This isn't pretty, but we need to find the 2456 * disk in our array and NULL our the pointer. 2457 * This is so that we will call alloc_disk if 2458 * this index is used again later. 2459 */ 2460 for (i=0; i < CISS_MAX_LUN; i++){ 2461 if (h->gendisk[i] == disk) { 2462 h->gendisk[i] = NULL; 2463 break; 2464 } 2465 } 2466 put_disk(disk); 2467 } 2468 } else { 2469 set_capacity(disk, 0); 2470 cciss_clear_drive_info(drv); 2471 } 2472 2473 --h->num_luns; 2474 2475 /* if it was the last disk, find the new hightest lun */ 2476 if (clear_all && recalculate_highest_lun) { 2477 int newhighest = -1; 2478 for (i = 0; i <= h->highest_lun; i++) { 2479 /* if the disk has size > 0, it is available */ 2480 if (h->drv[i] && h->drv[i]->heads) 2481 newhighest = i; 2482 } 2483 h->highest_lun = newhighest; 2484 } 2485 return 0; 2486} 2487 2488static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, 2489 size_t size, __u8 page_code, unsigned char *scsi3addr, 2490 int cmd_type) 2491{ 2492 ctlr_info_t *h = hba[ctlr]; 2493 u64bit buff_dma_handle; 2494 int status = IO_OK; 2495 2496 c->cmd_type = CMD_IOCTL_PEND; 2497 c->Header.ReplyQueue = 0; 2498 if (buff != NULL) { 2499 c->Header.SGList = 1; 2500 c->Header.SGTotal = 1; 2501 } else { 2502 c->Header.SGList = 0; 2503 c->Header.SGTotal = 0; 2504 } 2505 c->Header.Tag.lower = c->busaddr; 2506 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); 2507 2508 c->Request.Type.Type = cmd_type; 2509 if (cmd_type == TYPE_CMD) { 2510 switch (cmd) { 2511 case CISS_INQUIRY: 2512 /* are we trying to read a vital product page */ 2513 if (page_code != 0) { 2514 c->Request.CDB[1] = 0x01; 2515 c->Request.CDB[2] = page_code; 2516 } 2517 c->Request.CDBLen = 6; 2518 c->Request.Type.Attribute = ATTR_SIMPLE; 2519 c->Request.Type.Direction = XFER_READ; 2520 c->Request.Timeout = 0; 2521 c->Request.CDB[0] = CISS_INQUIRY; 2522 c->Request.CDB[4] = size & 0xFF; 2523 break; 2524 case CISS_REPORT_LOG: 2525 case CISS_REPORT_PHYS: 2526 /* Talking to controller so It's a physical command 2527 mode = 00 target = 0. Nothing to write. 2528 */ 2529 c->Request.CDBLen = 12; 2530 c->Request.Type.Attribute = ATTR_SIMPLE; 2531 c->Request.Type.Direction = XFER_READ; 2532 c->Request.Timeout = 0; 2533 c->Request.CDB[0] = cmd; 2534 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */ 2535 c->Request.CDB[7] = (size >> 16) & 0xFF; 2536 c->Request.CDB[8] = (size >> 8) & 0xFF; 2537 c->Request.CDB[9] = size & 0xFF; 2538 break; 2539 2540 case CCISS_READ_CAPACITY: 2541 c->Request.CDBLen = 10; 2542 c->Request.Type.Attribute = ATTR_SIMPLE; 2543 c->Request.Type.Direction = XFER_READ; 2544 c->Request.Timeout = 0; 2545 c->Request.CDB[0] = cmd; 2546 break; 2547 case CCISS_READ_CAPACITY_16: 2548 c->Request.CDBLen = 16; 2549 c->Request.Type.Attribute = ATTR_SIMPLE; 2550 c->Request.Type.Direction = XFER_READ; 2551 c->Request.Timeout = 0; 2552 c->Request.CDB[0] = cmd; 2553 c->Request.CDB[1] = 0x10; 2554 c->Request.CDB[10] = (size >> 24) & 0xFF; 2555 c->Request.CDB[11] = (size >> 16) & 0xFF; 2556 c->Request.CDB[12] = (size >> 8) & 0xFF; 2557 c->Request.CDB[13] = size & 0xFF; 2558 c->Request.Timeout = 0; 2559 c->Request.CDB[0] = cmd; 2560 break; 2561 case CCISS_CACHE_FLUSH: 2562 c->Request.CDBLen = 12; 2563 c->Request.Type.Attribute = ATTR_SIMPLE; 2564 c->Request.Type.Direction = XFER_WRITE; 2565 c->Request.Timeout = 0; 2566 c->Request.CDB[0] = BMIC_WRITE; 2567 c->Request.CDB[6] = BMIC_CACHE_FLUSH; 2568 break; 2569 case TEST_UNIT_READY: 2570 c->Request.CDBLen = 6; 2571 c->Request.Type.Attribute = ATTR_SIMPLE; 2572 c->Request.Type.Direction = XFER_NONE; 2573 c->Request.Timeout = 0; 2574 break; 2575 default: 2576 printk(KERN_WARNING 2577 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd); 2578 return IO_ERROR; 2579 } 2580 } else if (cmd_type == TYPE_MSG) { 2581 switch (cmd) { 2582 case 0: /* ABORT message */ 2583 c->Request.CDBLen = 12; 2584 c->Request.Type.Attribute = ATTR_SIMPLE; 2585 c->Request.Type.Direction = XFER_WRITE; 2586 c->Request.Timeout = 0; 2587 c->Request.CDB[0] = cmd; /* abort */ 2588 c->Request.CDB[1] = 0; /* abort a command */ 2589 /* buff contains the tag of the command to abort */ 2590 memcpy(&c->Request.CDB[4], buff, 8); 2591 break; 2592 case 1: /* RESET message */ 2593 c->Request.CDBLen = 16; 2594 c->Request.Type.Attribute = ATTR_SIMPLE; 2595 c->Request.Type.Direction = XFER_NONE; 2596 c->Request.Timeout = 0; 2597 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); 2598 c->Request.CDB[0] = cmd; /* reset */ 2599 c->Request.CDB[1] = 0x03; /* reset a target */ 2600 break; 2601 case 3: /* No-Op message */ 2602 c->Request.CDBLen = 1; 2603 c->Request.Type.Attribute = ATTR_SIMPLE; 2604 c->Request.Type.Direction = XFER_WRITE; 2605 c->Request.Timeout = 0; 2606 c->Request.CDB[0] = cmd; 2607 break; 2608 default: 2609 printk(KERN_WARNING 2610 "cciss%d: unknown message type %d\n", ctlr, cmd); 2611 return IO_ERROR; 2612 } 2613 } else { 2614 printk(KERN_WARNING 2615 "cciss%d: unknown command type %d\n", ctlr, cmd_type); 2616 return IO_ERROR; 2617 } 2618 /* Fill in the scatter gather information */ 2619 if (size > 0) { 2620 buff_dma_handle.val = (__u64) pci_map_single(h->pdev, 2621 buff, size, 2622 PCI_DMA_BIDIRECTIONAL); 2623 c->SG[0].Addr.lower = buff_dma_handle.val32.lower; 2624 c->SG[0].Addr.upper = buff_dma_handle.val32.upper; 2625 c->SG[0].Len = size; 2626 c->SG[0].Ext = 0; /* we are not chaining */ 2627 } 2628 return status; 2629} 2630 2631static int check_target_status(ctlr_info_t *h, CommandList_struct *c) 2632{ 2633 switch (c->err_info->ScsiStatus) { 2634 case SAM_STAT_GOOD: 2635 return IO_OK; 2636 case SAM_STAT_CHECK_CONDITION: 2637 switch (0xf & c->err_info->SenseInfo[2]) { 2638 case 0: return IO_OK; /* no sense */ 2639 case 1: return IO_OK; /* recovered error */ 2640 default: 2641 if (check_for_unit_attention(h, c)) 2642 return IO_NEEDS_RETRY; 2643 printk(KERN_WARNING "cciss%d: cmd 0x%02x " 2644 "check condition, sense key = 0x%02x\n", 2645 h->ctlr, c->Request.CDB[0], 2646 c->err_info->SenseInfo[2]); 2647 } 2648 break; 2649 default: 2650 printk(KERN_WARNING "cciss%d: cmd 0x%02x" 2651 "scsi status = 0x%02x\n", h->ctlr, 2652 c->Request.CDB[0], c->err_info->ScsiStatus); 2653 break; 2654 } 2655 return IO_ERROR; 2656} 2657 2658static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c) 2659{ 2660 int return_status = IO_OK; 2661 2662 if (c->err_info->CommandStatus == CMD_SUCCESS) 2663 return IO_OK; 2664 2665 switch (c->err_info->CommandStatus) { 2666 case CMD_TARGET_STATUS: 2667 return_status = check_target_status(h, c); 2668 break; 2669 case CMD_DATA_UNDERRUN: 2670 case CMD_DATA_OVERRUN: 2671 /* expected for inquiry and report lun commands */ 2672 break; 2673 case CMD_INVALID: 2674 printk(KERN_WARNING "cciss: cmd 0x%02x is " 2675 "reported invalid\n", c->Request.CDB[0]); 2676 return_status = IO_ERROR; 2677 break; 2678 case CMD_PROTOCOL_ERR: 2679 printk(KERN_WARNING "cciss: cmd 0x%02x has " 2680 "protocol error \n", c->Request.CDB[0]); 2681 return_status = IO_ERROR; 2682 break; 2683 case CMD_HARDWARE_ERR: 2684 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2685 " hardware error\n", c->Request.CDB[0]); 2686 return_status = IO_ERROR; 2687 break; 2688 case CMD_CONNECTION_LOST: 2689 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2690 "connection lost\n", c->Request.CDB[0]); 2691 return_status = IO_ERROR; 2692 break; 2693 case CMD_ABORTED: 2694 printk(KERN_WARNING "cciss: cmd 0x%02x was " 2695 "aborted\n", c->Request.CDB[0]); 2696 return_status = IO_ERROR; 2697 break; 2698 case CMD_ABORT_FAILED: 2699 printk(KERN_WARNING "cciss: cmd 0x%02x reports " 2700 "abort failed\n", c->Request.CDB[0]); 2701 return_status = IO_ERROR; 2702 break; 2703 case CMD_UNSOLICITED_ABORT: 2704 printk(KERN_WARNING 2705 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr, 2706 c->Request.CDB[0]); 2707 return_status = IO_NEEDS_RETRY; 2708 break; 2709 default: 2710 printk(KERN_WARNING "cciss: cmd 0x%02x returned " 2711 "unknown status %x\n", c->Request.CDB[0], 2712 c->err_info->CommandStatus); 2713 return_status = IO_ERROR; 2714 } 2715 return return_status; 2716} 2717 2718static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 2719 int attempt_retry) 2720{ 2721 DECLARE_COMPLETION_ONSTACK(wait); 2722 u64bit buff_dma_handle; 2723 int return_status = IO_OK; 2724 2725resend_cmd2: 2726 c->waiting = &wait; 2727 enqueue_cmd_and_start_io(h, c); 2728 2729 wait_for_completion(&wait); 2730 2731 if (c->err_info->CommandStatus == 0 || !attempt_retry) 2732 goto command_done; 2733 2734 return_status = process_sendcmd_error(h, c); 2735 2736 if (return_status == IO_NEEDS_RETRY && 2737 c->retry_count < MAX_CMD_RETRIES) { 2738 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr, 2739 c->Request.CDB[0]); 2740 c->retry_count++; 2741 /* erase the old error information */ 2742 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 2743 return_status = IO_OK; 2744 INIT_COMPLETION(wait); 2745 goto resend_cmd2; 2746 } 2747 2748command_done: 2749 /* unlock the buffers from DMA */ 2750 buff_dma_handle.val32.lower = c->SG[0].Addr.lower; 2751 buff_dma_handle.val32.upper = c->SG[0].Addr.upper; 2752 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, 2753 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); 2754 return return_status; 2755} 2756 2757static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 2758 __u8 page_code, unsigned char scsi3addr[], 2759 int cmd_type) 2760{ 2761 ctlr_info_t *h = hba[ctlr]; 2762 CommandList_struct *c; 2763 int return_status; 2764 2765 c = cmd_alloc(h, 0); 2766 if (!c) 2767 return -ENOMEM; 2768 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code, 2769 scsi3addr, cmd_type); 2770 if (return_status == IO_OK) 2771 return_status = sendcmd_withirq_core(h, c, 1); 2772 2773 cmd_free(h, c, 0); 2774 return return_status; 2775} 2776 2777static void cciss_geometry_inquiry(int ctlr, int logvol, 2778 sector_t total_size, 2779 unsigned int block_size, 2780 InquiryData_struct *inq_buff, 2781 drive_info_struct *drv) 2782{ 2783 int return_code; 2784 unsigned long t; 2785 unsigned char scsi3addr[8]; 2786 2787 memset(inq_buff, 0, sizeof(InquiryData_struct)); 2788 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2789 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff, 2790 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD); 2791 if (return_code == IO_OK) { 2792 if (inq_buff->data_byte[8] == 0xFF) { 2793 printk(KERN_WARNING 2794 "cciss: reading geometry failed, volume " 2795 "does not support reading geometry\n"); 2796 drv->heads = 255; 2797 drv->sectors = 32; /* Sectors per track */ 2798 drv->cylinders = total_size + 1; 2799 drv->raid_level = RAID_UNKNOWN; 2800 } else { 2801 drv->heads = inq_buff->data_byte[6]; 2802 drv->sectors = inq_buff->data_byte[7]; 2803 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8; 2804 drv->cylinders += inq_buff->data_byte[5]; 2805 drv->raid_level = inq_buff->data_byte[8]; 2806 } 2807 drv->block_size = block_size; 2808 drv->nr_blocks = total_size + 1; 2809 t = drv->heads * drv->sectors; 2810 if (t > 1) { 2811 sector_t real_size = total_size + 1; 2812 unsigned long rem = sector_div(real_size, t); 2813 if (rem) 2814 real_size++; 2815 drv->cylinders = real_size; 2816 } 2817 } else { /* Get geometry failed */ 2818 printk(KERN_WARNING "cciss: reading geometry failed\n"); 2819 } 2820} 2821 2822static void 2823cciss_read_capacity(int ctlr, int logvol, sector_t *total_size, 2824 unsigned int *block_size) 2825{ 2826 ReadCapdata_struct *buf; 2827 int return_code; 2828 unsigned char scsi3addr[8]; 2829 2830 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL); 2831 if (!buf) { 2832 printk(KERN_WARNING "cciss: out of memory\n"); 2833 return; 2834 } 2835 2836 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2837 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf, 2838 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD); 2839 if (return_code == IO_OK) { 2840 *total_size = be32_to_cpu(*(__be32 *) buf->total_size); 2841 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2842 } else { /* read capacity command failed */ 2843 printk(KERN_WARNING "cciss: read capacity failed\n"); 2844 *total_size = 0; 2845 *block_size = BLOCK_SIZE; 2846 } 2847 kfree(buf); 2848} 2849 2850static void cciss_read_capacity_16(int ctlr, int logvol, 2851 sector_t *total_size, unsigned int *block_size) 2852{ 2853 ReadCapdata_struct_16 *buf; 2854 int return_code; 2855 unsigned char scsi3addr[8]; 2856 2857 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL); 2858 if (!buf) { 2859 printk(KERN_WARNING "cciss: out of memory\n"); 2860 return; 2861 } 2862 2863 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2864 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16, 2865 ctlr, buf, sizeof(ReadCapdata_struct_16), 2866 0, scsi3addr, TYPE_CMD); 2867 if (return_code == IO_OK) { 2868 *total_size = be64_to_cpu(*(__be64 *) buf->total_size); 2869 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2870 } else { /* read capacity command failed */ 2871 printk(KERN_WARNING "cciss: read capacity failed\n"); 2872 *total_size = 0; 2873 *block_size = BLOCK_SIZE; 2874 } 2875 printk(KERN_INFO " blocks= %llu block_size= %d\n", 2876 (unsigned long long)*total_size+1, *block_size); 2877 kfree(buf); 2878} 2879 2880static int cciss_revalidate(struct gendisk *disk) 2881{ 2882 ctlr_info_t *h = get_host(disk); 2883 drive_info_struct *drv = get_drv(disk); 2884 int logvol; 2885 int FOUND = 0; 2886 unsigned int block_size; 2887 sector_t total_size; 2888 InquiryData_struct *inq_buff = NULL; 2889 2890 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { 2891 if (memcmp(h->drv[logvol]->LunID, drv->LunID, 2892 sizeof(drv->LunID)) == 0) { 2893 FOUND = 1; 2894 break; 2895 } 2896 } 2897 2898 if (!FOUND) 2899 return 1; 2900 2901 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 2902 if (inq_buff == NULL) { 2903 printk(KERN_WARNING "cciss: out of memory\n"); 2904 return 1; 2905 } 2906 if (h->cciss_read == CCISS_READ_10) { 2907 cciss_read_capacity(h->ctlr, logvol, 2908 &total_size, &block_size); 2909 } else { 2910 cciss_read_capacity_16(h->ctlr, logvol, 2911 &total_size, &block_size); 2912 } 2913 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size, 2914 inq_buff, drv); 2915 2916 blk_queue_logical_block_size(drv->queue, drv->block_size); 2917 set_capacity(disk, drv->nr_blocks); 2918 2919 kfree(inq_buff); 2920 return 0; 2921} 2922 2923/* 2924 * Map (physical) PCI mem into (virtual) kernel space 2925 */ 2926static void __iomem *remap_pci_mem(ulong base, ulong size) 2927{ 2928 ulong page_base = ((ulong) base) & PAGE_MASK; 2929 ulong page_offs = ((ulong) base) - page_base; 2930 void __iomem *page_remapped = ioremap(page_base, page_offs + size); 2931 2932 return page_remapped ? (page_remapped + page_offs) : NULL; 2933} 2934 2935/* 2936 * Takes jobs of the Q and sends them to the hardware, then puts it on 2937 * the Q to wait for completion. 2938 */ 2939static void start_io(ctlr_info_t *h) 2940{ 2941 CommandList_struct *c; 2942 2943 while (!hlist_empty(&h->reqQ)) { 2944 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 2945 /* can't do anything if fifo is full */ 2946 if ((h->access.fifo_full(h))) { 2947 printk(KERN_WARNING "cciss: fifo full\n"); 2948 break; 2949 } 2950 2951 /* Get the first entry from the Request Q */ 2952 removeQ(c); 2953 h->Qdepth--; 2954 2955 /* Tell the controller execute command */ 2956 h->access.submit_command(h, c); 2957 2958 /* Put job onto the completed Q */ 2959 addQ(&h->cmpQ, c); 2960 } 2961} 2962 2963/* Assumes that CCISS_LOCK(h->ctlr) is held. */ 2964/* Zeros out the error record and then resends the command back */ 2965/* to the controller */ 2966static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c) 2967{ 2968 /* erase the old error information */ 2969 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 2970 2971 /* add it to software queue and then send it to the controller */ 2972 addQ(&h->reqQ, c); 2973 h->Qdepth++; 2974 if (h->Qdepth > h->maxQsinceinit) 2975 h->maxQsinceinit = h->Qdepth; 2976 2977 start_io(h); 2978} 2979 2980static inline unsigned int make_status_bytes(unsigned int scsi_status_byte, 2981 unsigned int msg_byte, unsigned int host_byte, 2982 unsigned int driver_byte) 2983{ 2984 /* inverse of macros in scsi.h */ 2985 return (scsi_status_byte & 0xff) | 2986 ((msg_byte & 0xff) << 8) | 2987 ((host_byte & 0xff) << 16) | 2988 ((driver_byte & 0xff) << 24); 2989} 2990 2991static inline int evaluate_target_status(ctlr_info_t *h, 2992 CommandList_struct *cmd, int *retry_cmd) 2993{ 2994 unsigned char sense_key; 2995 unsigned char status_byte, msg_byte, host_byte, driver_byte; 2996 int error_value; 2997 2998 *retry_cmd = 0; 2999 /* If we get in here, it means we got "target status", that is, scsi status */ 3000 status_byte = cmd->err_info->ScsiStatus; 3001 driver_byte = DRIVER_OK; 3002 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */ 3003 3004 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) 3005 host_byte = DID_PASSTHROUGH; 3006 else 3007 host_byte = DID_OK; 3008 3009 error_value = make_status_bytes(status_byte, msg_byte, 3010 host_byte, driver_byte); 3011 3012 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) { 3013 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) 3014 printk(KERN_WARNING "cciss: cmd %p " 3015 "has SCSI Status 0x%x\n", 3016 cmd, cmd->err_info->ScsiStatus); 3017 return error_value; 3018 } 3019 3020 /* check the sense key */ 3021 sense_key = 0xf & cmd->err_info->SenseInfo[2]; 3022 /* no status or recovered error */ 3023 if (((sense_key == 0x0) || (sense_key == 0x1)) && 3024 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)) 3025 error_value = 0; 3026 3027 if (check_for_unit_attention(h, cmd)) { 3028 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC); 3029 return 0; 3030 } 3031 3032 /* Not SG_IO or similar? */ 3033 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) { 3034 if (error_value != 0) 3035 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION" 3036 " sense key = 0x%x\n", cmd, sense_key); 3037 return error_value; 3038 } 3039 3040 /* SG_IO or similar, copy sense data back */ 3041 if (cmd->rq->sense) { 3042 if (cmd->rq->sense_len > cmd->err_info->SenseLen) 3043 cmd->rq->sense_len = cmd->err_info->SenseLen; 3044 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo, 3045 cmd->rq->sense_len); 3046 } else 3047 cmd->rq->sense_len = 0; 3048 3049 return error_value; 3050} 3051 3052/* checks the status of the job and calls complete buffers to mark all 3053 * buffers for the completed job. Note that this function does not need 3054 * to hold the hba/queue lock. 3055 */ 3056static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd, 3057 int timeout) 3058{ 3059 int retry_cmd = 0; 3060 struct request *rq = cmd->rq; 3061 3062 rq->errors = 0; 3063 3064 if (timeout) 3065 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT); 3066 3067 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */ 3068 goto after_error_processing; 3069 3070 switch (cmd->err_info->CommandStatus) { 3071 case CMD_TARGET_STATUS: 3072 rq->errors = evaluate_target_status(h, cmd, &retry_cmd); 3073 break; 3074 case CMD_DATA_UNDERRUN: 3075 if (cmd->rq->cmd_type == REQ_TYPE_FS) { 3076 printk(KERN_WARNING "cciss: cmd %p has" 3077 " completed with data underrun " 3078 "reported\n", cmd); 3079 cmd->rq->resid_len = cmd->err_info->ResidualCnt; 3080 } 3081 break; 3082 case CMD_DATA_OVERRUN: 3083 if (cmd->rq->cmd_type == REQ_TYPE_FS) 3084 printk(KERN_WARNING "cciss: cmd %p has" 3085 " completed with data overrun " 3086 "reported\n", cmd); 3087 break; 3088 case CMD_INVALID: 3089 printk(KERN_WARNING "cciss: cmd %p is " 3090 "reported invalid\n", cmd); 3091 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3092 cmd->err_info->CommandStatus, DRIVER_OK, 3093 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3094 DID_PASSTHROUGH : DID_ERROR); 3095 break; 3096 case CMD_PROTOCOL_ERR: 3097 printk(KERN_WARNING "cciss: cmd %p has " 3098 "protocol error \n", cmd); 3099 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3100 cmd->err_info->CommandStatus, DRIVER_OK, 3101 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3102 DID_PASSTHROUGH : DID_ERROR); 3103 break; 3104 case CMD_HARDWARE_ERR: 3105 printk(KERN_WARNING "cciss: cmd %p had " 3106 " hardware error\n", cmd); 3107 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3108 cmd->err_info->CommandStatus, DRIVER_OK, 3109 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3110 DID_PASSTHROUGH : DID_ERROR); 3111 break; 3112 case CMD_CONNECTION_LOST: 3113 printk(KERN_WARNING "cciss: cmd %p had " 3114 "connection lost\n", cmd); 3115 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3116 cmd->err_info->CommandStatus, DRIVER_OK, 3117 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3118 DID_PASSTHROUGH : DID_ERROR); 3119 break; 3120 case CMD_ABORTED: 3121 printk(KERN_WARNING "cciss: cmd %p was " 3122 "aborted\n", cmd); 3123 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3124 cmd->err_info->CommandStatus, DRIVER_OK, 3125 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3126 DID_PASSTHROUGH : DID_ABORT); 3127 break; 3128 case CMD_ABORT_FAILED: 3129 printk(KERN_WARNING "cciss: cmd %p reports " 3130 "abort failed\n", cmd); 3131 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3132 cmd->err_info->CommandStatus, DRIVER_OK, 3133 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3134 DID_PASSTHROUGH : DID_ERROR); 3135 break; 3136 case CMD_UNSOLICITED_ABORT: 3137 printk(KERN_WARNING "cciss%d: unsolicited " 3138 "abort %p\n", h->ctlr, cmd); 3139 if (cmd->retry_count < MAX_CMD_RETRIES) { 3140 retry_cmd = 1; 3141 printk(KERN_WARNING 3142 "cciss%d: retrying %p\n", h->ctlr, cmd); 3143 cmd->retry_count++; 3144 } else 3145 printk(KERN_WARNING 3146 "cciss%d: %p retried too " 3147 "many times\n", h->ctlr, cmd); 3148 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3149 cmd->err_info->CommandStatus, DRIVER_OK, 3150 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3151 DID_PASSTHROUGH : DID_ABORT); 3152 break; 3153 case CMD_TIMEOUT: 3154 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd); 3155 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3156 cmd->err_info->CommandStatus, DRIVER_OK, 3157 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3158 DID_PASSTHROUGH : DID_ERROR); 3159 break; 3160 default: 3161 printk(KERN_WARNING "cciss: cmd %p returned " 3162 "unknown status %x\n", cmd, 3163 cmd->err_info->CommandStatus); 3164 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3165 cmd->err_info->CommandStatus, DRIVER_OK, 3166 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? 3167 DID_PASSTHROUGH : DID_ERROR); 3168 } 3169 3170after_error_processing: 3171 3172 /* We need to return this command */ 3173 if (retry_cmd) { 3174 resend_cciss_cmd(h, cmd); 3175 return; 3176 } 3177 cmd->rq->completion_data = cmd; 3178 blk_complete_request(cmd->rq); 3179} 3180 3181static inline u32 cciss_tag_contains_index(u32 tag) 3182{ 3183#define DIRECT_LOOKUP_BIT 0x10 3184 return tag & DIRECT_LOOKUP_BIT; 3185} 3186 3187static inline u32 cciss_tag_to_index(u32 tag) 3188{ 3189#define DIRECT_LOOKUP_SHIFT 5 3190 return tag >> DIRECT_LOOKUP_SHIFT; 3191} 3192 3193static inline u32 cciss_tag_discard_error_bits(u32 tag) 3194{ 3195#define CCISS_ERROR_BITS 0x03 3196 return tag & ~CCISS_ERROR_BITS; 3197} 3198 3199static inline void cciss_mark_tag_indexed(u32 *tag) 3200{ 3201 *tag |= DIRECT_LOOKUP_BIT; 3202} 3203 3204static inline void cciss_set_tag_index(u32 *tag, u32 index) 3205{ 3206 *tag |= (index << DIRECT_LOOKUP_SHIFT); 3207} 3208 3209/* 3210 * Get a request and submit it to the controller. 3211 */ 3212static void do_cciss_request(struct request_queue *q) 3213{ 3214 ctlr_info_t *h = q->queuedata; 3215 CommandList_struct *c; 3216 sector_t start_blk; 3217 int seg; 3218 struct request *creq; 3219 u64bit temp64; 3220 struct scatterlist *tmp_sg; 3221 SGDescriptor_struct *curr_sg; 3222 drive_info_struct *drv; 3223 int i, dir; 3224 int sg_index = 0; 3225 int chained = 0; 3226 3227 /* We call start_io here in case there is a command waiting on the 3228 * queue that has not been sent. 3229 */ 3230 if (blk_queue_plugged(q)) 3231 goto startio; 3232 3233 queue: 3234 creq = blk_peek_request(q); 3235 if (!creq) 3236 goto startio; 3237 3238 BUG_ON(creq->nr_phys_segments > h->maxsgentries); 3239 3240 if ((c = cmd_alloc(h, 1)) == NULL) 3241 goto full; 3242 3243 blk_start_request(creq); 3244 3245 tmp_sg = h->scatter_list[c->cmdindex]; 3246 spin_unlock_irq(q->queue_lock); 3247 3248 c->cmd_type = CMD_RWREQ; 3249 c->rq = creq; 3250 3251 /* fill in the request */ 3252 drv = creq->rq_disk->private_data; 3253 c->Header.ReplyQueue = 0; /* unused in simple mode */ 3254 /* got command from pool, so use the command block index instead */ 3255 /* for direct lookups. */ 3256 /* The first 2 bits are reserved for controller error reporting. */ 3257 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex); 3258 cciss_mark_tag_indexed(&c->Header.Tag.lower); 3259 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID)); 3260 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */ 3261 c->Request.Type.Type = TYPE_CMD; /* It is a command. */ 3262 c->Request.Type.Attribute = ATTR_SIMPLE; 3263 c->Request.Type.Direction = 3264 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE; 3265 c->Request.Timeout = 0; /* Don't time out */ 3266 c->Request.CDB[0] = 3267 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write; 3268 start_blk = blk_rq_pos(creq); 3269#ifdef CCISS_DEBUG 3270 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", 3271 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq)); 3272#endif /* CCISS_DEBUG */ 3273 3274 sg_init_table(tmp_sg, h->maxsgentries); 3275 seg = blk_rq_map_sg(q, creq, tmp_sg); 3276 3277 /* get the DMA records for the setup */ 3278 if (c->Request.Type.Direction == XFER_READ) 3279 dir = PCI_DMA_FROMDEVICE; 3280 else 3281 dir = PCI_DMA_TODEVICE; 3282 3283 curr_sg = c->SG; 3284 sg_index = 0; 3285 chained = 0; 3286 3287 for (i = 0; i < seg; i++) { 3288 if (((sg_index+1) == (h->max_cmd_sgentries)) && 3289 !chained && ((seg - i) > 1)) { 3290 /* Point to next chain block. */ 3291 curr_sg = h->cmd_sg_list[c->cmdindex]; 3292 sg_index = 0; 3293 chained = 1; 3294 } 3295 curr_sg[sg_index].Len = tmp_sg[i].length; 3296 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]), 3297 tmp_sg[i].offset, 3298 tmp_sg[i].length, dir); 3299 curr_sg[sg_index].Addr.lower = temp64.val32.lower; 3300 curr_sg[sg_index].Addr.upper = temp64.val32.upper; 3301 curr_sg[sg_index].Ext = 0; /* we are not chaining */ 3302 ++sg_index; 3303 } 3304 if (chained) 3305 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex], 3306 (seg - (h->max_cmd_sgentries - 1)) * 3307 sizeof(SGDescriptor_struct)); 3308 3309 /* track how many SG entries we are using */ 3310 if (seg > h->maxSG) 3311 h->maxSG = seg; 3312 3313#ifdef CCISS_DEBUG 3314 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments " 3315 "chained[%d]\n", 3316 blk_rq_sectors(creq), seg, chained); 3317#endif /* CCISS_DEBUG */ 3318 3319 c->Header.SGTotal = seg + chained; 3320 if (seg <= h->max_cmd_sgentries) 3321 c->Header.SGList = c->Header.SGTotal; 3322 else 3323 c->Header.SGList = h->max_cmd_sgentries; 3324 set_performant_mode(h, c); 3325 3326 if (likely(creq->cmd_type == REQ_TYPE_FS)) { 3327 if(h->cciss_read == CCISS_READ_10) { 3328 c->Request.CDB[1] = 0; 3329 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */ 3330 c->Request.CDB[3] = (start_blk >> 16) & 0xff; 3331 c->Request.CDB[4] = (start_blk >> 8) & 0xff; 3332 c->Request.CDB[5] = start_blk & 0xff; 3333 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */ 3334 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff; 3335 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff; 3336 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0; 3337 } else { 3338 u32 upper32 = upper_32_bits(start_blk); 3339 3340 c->Request.CDBLen = 16; 3341 c->Request.CDB[1]= 0; 3342 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */ 3343 c->Request.CDB[3]= (upper32 >> 16) & 0xff; 3344 c->Request.CDB[4]= (upper32 >> 8) & 0xff; 3345 c->Request.CDB[5]= upper32 & 0xff; 3346 c->Request.CDB[6]= (start_blk >> 24) & 0xff; 3347 c->Request.CDB[7]= (start_blk >> 16) & 0xff; 3348 c->Request.CDB[8]= (start_blk >> 8) & 0xff; 3349 c->Request.CDB[9]= start_blk & 0xff; 3350 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff; 3351 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff; 3352 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff; 3353 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff; 3354 c->Request.CDB[14] = c->Request.CDB[15] = 0; 3355 } 3356 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) { 3357 c->Request.CDBLen = creq->cmd_len; 3358 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB); 3359 } else { 3360 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type); 3361 BUG(); 3362 } 3363 3364 spin_lock_irq(q->queue_lock); 3365 3366 addQ(&h->reqQ, c); 3367 h->Qdepth++; 3368 if (h->Qdepth > h->maxQsinceinit) 3369 h->maxQsinceinit = h->Qdepth; 3370 3371 goto queue; 3372full: 3373 blk_stop_queue(q); 3374startio: 3375 /* We will already have the driver lock here so not need 3376 * to lock it. 3377 */ 3378 start_io(h); 3379} 3380 3381static inline unsigned long get_next_completion(ctlr_info_t *h) 3382{ 3383 return h->access.command_completed(h); 3384} 3385 3386static inline int interrupt_pending(ctlr_info_t *h) 3387{ 3388 return h->access.intr_pending(h); 3389} 3390 3391static inline long interrupt_not_for_us(ctlr_info_t *h) 3392{ 3393 return !(h->msi_vector || h->msix_vector) && 3394 ((h->access.intr_pending(h) == 0) || 3395 (h->interrupts_enabled == 0)); 3396} 3397 3398static inline int bad_tag(ctlr_info_t *h, u32 tag_index, 3399 u32 raw_tag) 3400{ 3401 if (unlikely(tag_index >= h->nr_cmds)) { 3402 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag); 3403 return 1; 3404 } 3405 return 0; 3406} 3407 3408static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c, 3409 u32 raw_tag) 3410{ 3411 removeQ(c); 3412 if (likely(c->cmd_type == CMD_RWREQ)) 3413 complete_command(h, c, 0); 3414 else if (c->cmd_type == CMD_IOCTL_PEND) 3415 complete(c->waiting); 3416#ifdef CONFIG_CISS_SCSI_TAPE 3417 else if (c->cmd_type == CMD_SCSI) 3418 complete_scsi_command(c, 0, raw_tag); 3419#endif 3420} 3421 3422static inline u32 next_command(ctlr_info_t *h) 3423{ 3424 u32 a; 3425 3426 if (unlikely(h->transMethod != CFGTBL_Trans_Performant)) 3427 return h->access.command_completed(h); 3428 3429 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { 3430 a = *(h->reply_pool_head); /* Next cmd in ring buffer */ 3431 (h->reply_pool_head)++; 3432 h->commands_outstanding--; 3433 } else { 3434 a = FIFO_EMPTY; 3435 } 3436 /* Check for wraparound */ 3437 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) { 3438 h->reply_pool_head = h->reply_pool; 3439 h->reply_pool_wraparound ^= 1; 3440 } 3441 return a; 3442} 3443 3444/* process completion of an indexed ("direct lookup") command */ 3445static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag) 3446{ 3447 u32 tag_index; 3448 CommandList_struct *c; 3449 3450 tag_index = cciss_tag_to_index(raw_tag); 3451 if (bad_tag(h, tag_index, raw_tag)) 3452 return next_command(h); 3453 c = h->cmd_pool + tag_index; 3454 finish_cmd(h, c, raw_tag); 3455 return next_command(h); 3456} 3457 3458/* process completion of a non-indexed command */ 3459static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag) 3460{ 3461 u32 tag; 3462 CommandList_struct *c = NULL; 3463 struct hlist_node *tmp; 3464 __u32 busaddr_masked, tag_masked; 3465 3466 tag = cciss_tag_discard_error_bits(raw_tag); 3467 hlist_for_each_entry(c, tmp, &h->cmpQ, list) { 3468 busaddr_masked = cciss_tag_discard_error_bits(c->busaddr); 3469 tag_masked = cciss_tag_discard_error_bits(tag); 3470 if (busaddr_masked == tag_masked) { 3471 finish_cmd(h, c, raw_tag); 3472 return next_command(h); 3473 } 3474 } 3475 bad_tag(h, h->nr_cmds + 1, raw_tag); 3476 return next_command(h); 3477} 3478 3479static irqreturn_t do_cciss_intx(int irq, void *dev_id) 3480{ 3481 ctlr_info_t *h = dev_id; 3482 unsigned long flags; 3483 u32 raw_tag; 3484 3485 if (interrupt_not_for_us(h)) 3486 return IRQ_NONE; 3487 /* 3488 * If there are completed commands in the completion queue, 3489 * we had better do something about it. 3490 */ 3491 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 3492 while (interrupt_pending(h)) { 3493 raw_tag = get_next_completion(h); 3494 while (raw_tag != FIFO_EMPTY) { 3495 if (cciss_tag_contains_index(raw_tag)) 3496 raw_tag = process_indexed_cmd(h, raw_tag); 3497 else 3498 raw_tag = process_nonindexed_cmd(h, raw_tag); 3499 } 3500 } 3501 3502 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 3503 return IRQ_HANDLED; 3504} 3505 3506/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never 3507 * check the interrupt pending register because it is not set. 3508 */ 3509static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id) 3510{ 3511 ctlr_info_t *h = dev_id; 3512 unsigned long flags; 3513 u32 raw_tag; 3514 3515 if (interrupt_not_for_us(h)) 3516 return IRQ_NONE; 3517 /* 3518 * If there are completed commands in the completion queue, 3519 * we had better do something about it. 3520 */ 3521 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 3522 raw_tag = get_next_completion(h); 3523 while (raw_tag != FIFO_EMPTY) { 3524 if (cciss_tag_contains_index(raw_tag)) 3525 raw_tag = process_indexed_cmd(h, raw_tag); 3526 else 3527 raw_tag = process_nonindexed_cmd(h, raw_tag); 3528 } 3529 3530 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 3531 return IRQ_HANDLED; 3532} 3533 3534/** 3535 * add_to_scan_list() - add controller to rescan queue 3536 * @h: Pointer to the controller. 3537 * 3538 * Adds the controller to the rescan queue if not already on the queue. 3539 * 3540 * returns 1 if added to the queue, 0 if skipped (could be on the 3541 * queue already, or the controller could be initializing or shutting 3542 * down). 3543 **/ 3544static int add_to_scan_list(struct ctlr_info *h) 3545{ 3546 struct ctlr_info *test_h; 3547 int found = 0; 3548 int ret = 0; 3549 3550 if (h->busy_initializing) 3551 return 0; 3552 3553 if (!mutex_trylock(&h->busy_shutting_down)) 3554 return 0; 3555 3556 mutex_lock(&scan_mutex); 3557 list_for_each_entry(test_h, &scan_q, scan_list) { 3558 if (test_h == h) { 3559 found = 1; 3560 break; 3561 } 3562 } 3563 if (!found && !h->busy_scanning) { 3564 INIT_COMPLETION(h->scan_wait); 3565 list_add_tail(&h->scan_list, &scan_q); 3566 ret = 1; 3567 } 3568 mutex_unlock(&scan_mutex); 3569 mutex_unlock(&h->busy_shutting_down); 3570 3571 return ret; 3572} 3573 3574/** 3575 * remove_from_scan_list() - remove controller from rescan queue 3576 * @h: Pointer to the controller. 3577 * 3578 * Removes the controller from the rescan queue if present. Blocks if 3579 * the controller is currently conducting a rescan. The controller 3580 * can be in one of three states: 3581 * 1. Doesn't need a scan 3582 * 2. On the scan list, but not scanning yet (we remove it) 3583 * 3. Busy scanning (and not on the list). In this case we want to wait for 3584 * the scan to complete to make sure the scanning thread for this 3585 * controller is completely idle. 3586 **/ 3587static void remove_from_scan_list(struct ctlr_info *h) 3588{ 3589 struct ctlr_info *test_h, *tmp_h; 3590 3591 mutex_lock(&scan_mutex); 3592 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) { 3593 if (test_h == h) { /* state 2. */ 3594 list_del(&h->scan_list); 3595 complete_all(&h->scan_wait); 3596 mutex_unlock(&scan_mutex); 3597 return; 3598 } 3599 } 3600 if (h->busy_scanning) { /* state 3. */ 3601 mutex_unlock(&scan_mutex); 3602 wait_for_completion(&h->scan_wait); 3603 } else { /* state 1, nothing to do. */ 3604 mutex_unlock(&scan_mutex); 3605 } 3606} 3607 3608/** 3609 * scan_thread() - kernel thread used to rescan controllers 3610 * @data: Ignored. 3611 * 3612 * A kernel thread used scan for drive topology changes on 3613 * controllers. The thread processes only one controller at a time 3614 * using a queue. Controllers are added to the queue using 3615 * add_to_scan_list() and removed from the queue either after done 3616 * processing or using remove_from_scan_list(). 3617 * 3618 * returns 0. 3619 **/ 3620static int scan_thread(void *data) 3621{ 3622 struct ctlr_info *h; 3623 3624 while (1) { 3625 set_current_state(TASK_INTERRUPTIBLE); 3626 schedule(); 3627 if (kthread_should_stop()) 3628 break; 3629 3630 while (1) { 3631 mutex_lock(&scan_mutex); 3632 if (list_empty(&scan_q)) { 3633 mutex_unlock(&scan_mutex); 3634 break; 3635 } 3636 3637 h = list_entry(scan_q.next, 3638 struct ctlr_info, 3639 scan_list); 3640 list_del(&h->scan_list); 3641 h->busy_scanning = 1; 3642 mutex_unlock(&scan_mutex); 3643 3644 rebuild_lun_table(h, 0, 0); 3645 complete_all(&h->scan_wait); 3646 mutex_lock(&scan_mutex); 3647 h->busy_scanning = 0; 3648 mutex_unlock(&scan_mutex); 3649 } 3650 } 3651 3652 return 0; 3653} 3654 3655static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c) 3656{ 3657 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) 3658 return 0; 3659 3660 switch (c->err_info->SenseInfo[12]) { 3661 case STATE_CHANGED: 3662 printk(KERN_WARNING "cciss%d: a state change " 3663 "detected, command retried\n", h->ctlr); 3664 return 1; 3665 break; 3666 case LUN_FAILED: 3667 printk(KERN_WARNING "cciss%d: LUN failure " 3668 "detected, action required\n", h->ctlr); 3669 return 1; 3670 break; 3671 case REPORT_LUNS_CHANGED: 3672 printk(KERN_WARNING "cciss%d: report LUN data " 3673 "changed\n", h->ctlr); 3674 /* 3675 * Here, we could call add_to_scan_list and wake up the scan thread, 3676 * except that it's quite likely that we will get more than one 3677 * REPORT_LUNS_CHANGED condition in quick succession, which means 3678 * that those which occur after the first one will likely happen 3679 * *during* the scan_thread's rescan. And the rescan code is not 3680 * robust enough to restart in the middle, undoing what it has already 3681 * done, and it's not clear that it's even possible to do this, since 3682 * part of what it does is notify the block layer, which starts 3683 * doing it's own i/o to read partition tables and so on, and the 3684 * driver doesn't have visibility to know what might need undoing. 3685 * In any event, if possible, it is horribly complicated to get right 3686 * so we just don't do it for now. 3687 * 3688 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012. 3689 */ 3690 return 1; 3691 break; 3692 case POWER_OR_RESET: 3693 printk(KERN_WARNING "cciss%d: a power on " 3694 "or device reset detected\n", h->ctlr); 3695 return 1; 3696 break; 3697 case UNIT_ATTENTION_CLEARED: 3698 printk(KERN_WARNING "cciss%d: unit attention " 3699 "cleared by another initiator\n", h->ctlr); 3700 return 1; 3701 break; 3702 default: 3703 printk(KERN_WARNING "cciss%d: unknown " 3704 "unit attention detected\n", h->ctlr); 3705 return 1; 3706 } 3707} 3708 3709/* 3710 * We cannot read the structure directly, for portability we must use 3711 * the io functions. 3712 * This is for debug only. 3713 */ 3714#ifdef CCISS_DEBUG 3715static void print_cfg_table(CfgTable_struct *tb) 3716{ 3717 int i; 3718 char temp_name[17]; 3719 3720 printk("Controller Configuration information\n"); 3721 printk("------------------------------------\n"); 3722 for (i = 0; i < 4; i++) 3723 temp_name[i] = readb(&(tb->Signature[i])); 3724 temp_name[4] = '\0'; 3725 printk(" Signature = %s\n", temp_name); 3726 printk(" Spec Number = %d\n", readl(&(tb->SpecValence))); 3727 printk(" Transport methods supported = 0x%x\n", 3728 readl(&(tb->TransportSupport))); 3729 printk(" Transport methods active = 0x%x\n", 3730 readl(&(tb->TransportActive))); 3731 printk(" Requested transport Method = 0x%x\n", 3732 readl(&(tb->HostWrite.TransportRequest))); 3733 printk(" Coalesce Interrupt Delay = 0x%x\n", 3734 readl(&(tb->HostWrite.CoalIntDelay))); 3735 printk(" Coalesce Interrupt Count = 0x%x\n", 3736 readl(&(tb->HostWrite.CoalIntCount))); 3737 printk(" Max outstanding commands = 0x%d\n", 3738 readl(&(tb->CmdsOutMax))); 3739 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes))); 3740 for (i = 0; i < 16; i++) 3741 temp_name[i] = readb(&(tb->ServerName[i])); 3742 temp_name[16] = '\0'; 3743 printk(" Server Name = %s\n", temp_name); 3744 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat))); 3745} 3746#endif /* CCISS_DEBUG */ 3747 3748static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) 3749{ 3750 int i, offset, mem_type, bar_type; 3751 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ 3752 return 0; 3753 offset = 0; 3754 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3755 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; 3756 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) 3757 offset += 4; 3758 else { 3759 mem_type = pci_resource_flags(pdev, i) & 3760 PCI_BASE_ADDRESS_MEM_TYPE_MASK; 3761 switch (mem_type) { 3762 case PCI_BASE_ADDRESS_MEM_TYPE_32: 3763 case PCI_BASE_ADDRESS_MEM_TYPE_1M: 3764 offset += 4; /* 32 bit */ 3765 break; 3766 case PCI_BASE_ADDRESS_MEM_TYPE_64: 3767 offset += 8; 3768 break; 3769 default: /* reserved in PCI 2.2 */ 3770 printk(KERN_WARNING 3771 "Base address is invalid\n"); 3772 return -1; 3773 break; 3774 } 3775 } 3776 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) 3777 return i + 1; 3778 } 3779 return -1; 3780} 3781 3782/* Fill in bucket_map[], given nsgs (the max number of 3783 * scatter gather elements supported) and bucket[], 3784 * which is an array of 8 integers. The bucket[] array 3785 * contains 8 different DMA transfer sizes (in 16 3786 * byte increments) which the controller uses to fetch 3787 * commands. This function fills in bucket_map[], which 3788 * maps a given number of scatter gather elements to one of 3789 * the 8 DMA transfer sizes. The point of it is to allow the 3790 * controller to only do as much DMA as needed to fetch the 3791 * command, with the DMA transfer size encoded in the lower 3792 * bits of the command address. 3793 */ 3794static void calc_bucket_map(int bucket[], int num_buckets, 3795 int nsgs, int *bucket_map) 3796{ 3797 int i, j, b, size; 3798 3799 /* even a command with 0 SGs requires 4 blocks */ 3800#define MINIMUM_TRANSFER_BLOCKS 4 3801#define NUM_BUCKETS 8 3802 /* Note, bucket_map must have nsgs+1 entries. */ 3803 for (i = 0; i <= nsgs; i++) { 3804 /* Compute size of a command with i SG entries */ 3805 size = i + MINIMUM_TRANSFER_BLOCKS; 3806 b = num_buckets; /* Assume the biggest bucket */ 3807 /* Find the bucket that is just big enough */ 3808 for (j = 0; j < 8; j++) { 3809 if (bucket[j] >= size) { 3810 b = j; 3811 break; 3812 } 3813 } 3814 /* for a command with i SG entries, use bucket b. */ 3815 bucket_map[i] = b; 3816 } 3817} 3818 3819static void 3820cciss_put_controller_into_performant_mode(ctlr_info_t *h) 3821{ 3822 int l = 0; 3823 __u32 trans_support; 3824 __u32 trans_offset; 3825 /* 3826 * 5 = 1 s/g entry or 4k 3827 * 6 = 2 s/g entry or 8k 3828 * 8 = 4 s/g entry or 16k 3829 * 10 = 6 s/g entry or 24k 3830 */ 3831 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4}; 3832 unsigned long register_value; 3833 3834 BUILD_BUG_ON(28 > MAXSGENTRIES + 4); 3835 3836 /* Attempt to put controller into performant mode if supported */ 3837 /* Does board support performant mode? */ 3838 trans_support = readl(&(h->cfgtable->TransportSupport)); 3839 if (!(trans_support & PERFORMANT_MODE)) 3840 return; 3841 3842 printk(KERN_WARNING "cciss%d: Placing controller into " 3843 "performant mode\n", h->ctlr); 3844 /* Performant mode demands commands on a 32 byte boundary 3845 * pci_alloc_consistent aligns on page boundarys already. 3846 * Just need to check if divisible by 32 3847 */ 3848 if ((sizeof(CommandList_struct) % 32) != 0) { 3849 printk(KERN_WARNING "%s %d %s\n", 3850 "cciss info: command size[", 3851 (int)sizeof(CommandList_struct), 3852 "] not divisible by 32, no performant mode..\n"); 3853 return; 3854 } 3855 3856 /* Performant mode ring buffer and supporting data structures */ 3857 h->reply_pool = (__u64 *)pci_alloc_consistent( 3858 h->pdev, h->max_commands * sizeof(__u64), 3859 &(h->reply_pool_dhandle)); 3860 3861 /* Need a block fetch table for performant mode */ 3862 h->blockFetchTable = kmalloc(((h->maxsgentries+1) * 3863 sizeof(__u32)), GFP_KERNEL); 3864 3865 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL)) 3866 goto clean_up; 3867 3868 h->reply_pool_wraparound = 1; /* spec: init to 1 */ 3869 3870 /* Controller spec: zero out this buffer. */ 3871 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64)); 3872 h->reply_pool_head = h->reply_pool; 3873 3874 trans_offset = readl(&(h->cfgtable->TransMethodOffset)); 3875 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries, 3876 h->blockFetchTable); 3877 writel(bft[0], &h->transtable->BlockFetch0); 3878 writel(bft[1], &h->transtable->BlockFetch1); 3879 writel(bft[2], &h->transtable->BlockFetch2); 3880 writel(bft[3], &h->transtable->BlockFetch3); 3881 writel(bft[4], &h->transtable->BlockFetch4); 3882 writel(bft[5], &h->transtable->BlockFetch5); 3883 writel(bft[6], &h->transtable->BlockFetch6); 3884 writel(bft[7], &h->transtable->BlockFetch7); 3885 3886 /* size of controller ring buffer */ 3887 writel(h->max_commands, &h->transtable->RepQSize); 3888 writel(1, &h->transtable->RepQCount); 3889 writel(0, &h->transtable->RepQCtrAddrLow32); 3890 writel(0, &h->transtable->RepQCtrAddrHigh32); 3891 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32); 3892 writel(0, &h->transtable->RepQAddr0High32); 3893 writel(CFGTBL_Trans_Performant, 3894 &(h->cfgtable->HostWrite.TransportRequest)); 3895 3896 h->transMethod = CFGTBL_Trans_Performant; 3897 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); 3898 /* under certain very rare conditions, this can take awhile. 3899 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right 3900 * as we enter this code.) */ 3901 for (l = 0; l < MAX_CONFIG_WAIT; l++) { 3902 register_value = readl(h->vaddr + SA5_DOORBELL); 3903 if (!(register_value & CFGTBL_ChangeReq)) 3904 break; 3905 /* delay and try again */ 3906 set_current_state(TASK_INTERRUPTIBLE); 3907 schedule_timeout(10); 3908 } 3909 register_value = readl(&(h->cfgtable->TransportActive)); 3910 if (!(register_value & CFGTBL_Trans_Performant)) { 3911 printk(KERN_WARNING "cciss: unable to get board into" 3912 " performant mode\n"); 3913 return; 3914 } 3915 3916 /* Change the access methods to the performant access methods */ 3917 h->access = SA5_performant_access; 3918 3919 return; 3920clean_up: 3921 kfree(h->blockFetchTable); 3922 if (h->reply_pool) 3923 pci_free_consistent(h->pdev, 3924 h->max_commands * sizeof(__u64), 3925 h->reply_pool, 3926 h->reply_pool_dhandle); 3927 return; 3928 3929} /* cciss_put_controller_into_performant_mode */ 3930 3931/* If MSI/MSI-X is supported by the kernel we will try to enable it on 3932 * controllers that are capable. If not, we use IO-APIC mode. 3933 */ 3934 3935static void __devinit cciss_interrupt_mode(ctlr_info_t *c) 3936{ 3937#ifdef CONFIG_PCI_MSI 3938 int err; 3939 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1}, 3940 {0, 2}, {0, 3} 3941 }; 3942 3943 /* Some boards advertise MSI but don't really support it */ 3944 if ((c->board_id == 0x40700E11) || (c->board_id == 0x40800E11) || 3945 (c->board_id == 0x40820E11) || (c->board_id == 0x40830E11)) 3946 goto default_int_mode; 3947 3948 if (pci_find_capability(c->pdev, PCI_CAP_ID_MSIX)) { 3949 err = pci_enable_msix(c->pdev, cciss_msix_entries, 4); 3950 if (!err) { 3951 c->intr[0] = cciss_msix_entries[0].vector; 3952 c->intr[1] = cciss_msix_entries[1].vector; 3953 c->intr[2] = cciss_msix_entries[2].vector; 3954 c->intr[3] = cciss_msix_entries[3].vector; 3955 c->msix_vector = 1; 3956 return; 3957 } 3958 if (err > 0) { 3959 printk(KERN_WARNING "cciss: only %d MSI-X vectors " 3960 "available\n", err); 3961 goto default_int_mode; 3962 } else { 3963 printk(KERN_WARNING "cciss: MSI-X init failed %d\n", 3964 err); 3965 goto default_int_mode; 3966 } 3967 } 3968 if (pci_find_capability(c->pdev, PCI_CAP_ID_MSI)) { 3969 if (!pci_enable_msi(c->pdev)) { 3970 c->msi_vector = 1; 3971 } else { 3972 printk(KERN_WARNING "cciss: MSI init failed\n"); 3973 } 3974 } 3975default_int_mode: 3976#endif /* CONFIG_PCI_MSI */ 3977 /* if we get here we're going to use the default interrupt mode */ 3978 c->intr[PERF_MODE_INT] = c->pdev->irq; 3979 return; 3980} 3981 3982static int __devinit cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id) 3983{ 3984 int i; 3985 u32 subsystem_vendor_id, subsystem_device_id; 3986 3987 subsystem_vendor_id = pdev->subsystem_vendor; 3988 subsystem_device_id = pdev->subsystem_device; 3989 *board_id = ((subsystem_device_id << 16) & 0xffff0000) | 3990 subsystem_vendor_id; 3991 3992 for (i = 0; i < ARRAY_SIZE(products); i++) { 3993 /* Stand aside for hpsa driver on request */ 3994 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY) 3995 return -ENODEV; 3996 if (*board_id == products[i].board_id) 3997 return i; 3998 } 3999 dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n", 4000 *board_id); 4001 return -ENODEV; 4002} 4003 4004static inline bool cciss_board_disabled(ctlr_info_t *h) 4005{ 4006 u16 command; 4007 4008 (void) pci_read_config_word(h->pdev, PCI_COMMAND, &command); 4009 return ((command & PCI_COMMAND_MEMORY) == 0); 4010} 4011 4012static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev, 4013 unsigned long *memory_bar) 4014{ 4015 int i; 4016 4017 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) 4018 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) { 4019 /* addressing mode bits already removed */ 4020 *memory_bar = pci_resource_start(pdev, i); 4021 dev_dbg(&pdev->dev, "memory BAR = %lx\n", 4022 *memory_bar); 4023 return 0; 4024 } 4025 dev_warn(&pdev->dev, "no memory BAR found\n"); 4026 return -ENODEV; 4027} 4028 4029static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h) 4030{ 4031 int i; 4032 u32 scratchpad; 4033 4034 for (i = 0; i < CCISS_BOARD_READY_ITERATIONS; i++) { 4035 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET); 4036 if (scratchpad == CCISS_FIRMWARE_READY) 4037 return 0; 4038 msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS); 4039 } 4040 dev_warn(&h->pdev->dev, "board not ready, timed out.\n"); 4041 return -ENODEV; 4042} 4043 4044static int __devinit cciss_find_cfgtables(ctlr_info_t *h) 4045{ 4046 u64 cfg_offset; 4047 u32 cfg_base_addr; 4048 u64 cfg_base_addr_index; 4049 u32 trans_offset; 4050 4051 /* get the address index number */ 4052 cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET); 4053 cfg_base_addr &= (u32) 0x0000ffff; 4054 cfg_base_addr_index = find_PCI_BAR_index(h->pdev, cfg_base_addr); 4055 if (cfg_base_addr_index == -1) { 4056 dev_warn(&h->pdev->dev, "cannot find cfg_base_addr_index\n"); 4057 return -ENODEV; 4058 } 4059 cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET); 4060 h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev, 4061 cfg_base_addr_index) + cfg_offset, 4062 sizeof(h->cfgtable)); 4063 if (!h->cfgtable) 4064 return -ENOMEM; 4065 /* Find performant mode table. */ 4066 trans_offset = readl(&(h->cfgtable->TransMethodOffset)); 4067 h->transtable = remap_pci_mem(pci_resource_start(h->pdev, 4068 cfg_base_addr_index)+cfg_offset+trans_offset, 4069 sizeof(*h->transtable)); 4070 if (!h->transtable) 4071 return -ENOMEM; 4072 return 0; 4073} 4074 4075static int __devinit cciss_pci_init(ctlr_info_t *c) 4076{ 4077 int prod_index, err; 4078 4079 prod_index = cciss_lookup_board_id(c->pdev, &c->board_id); 4080 if (prod_index < 0) 4081 return -ENODEV; 4082 c->product_name = products[prod_index].product_name; 4083 c->access = *(products[prod_index].access); 4084 4085 if (cciss_board_disabled(c)) { 4086 printk(KERN_WARNING 4087 "cciss: controller appears to be disabled\n"); 4088 return -ENODEV; 4089 } 4090 err = pci_enable_device(c->pdev); 4091 if (err) { 4092 printk(KERN_ERR "cciss: Unable to Enable PCI device\n"); 4093 return err; 4094 } 4095 4096 err = pci_request_regions(c->pdev, "cciss"); 4097 if (err) { 4098 printk(KERN_ERR "cciss: Cannot obtain PCI resources, " 4099 "aborting\n"); 4100 return err; 4101 } 4102 4103#ifdef CCISS_DEBUG 4104 printk(KERN_INFO "command = %x\n", command); 4105 printk(KERN_INFO "irq = %x\n", c->pdev->irq); 4106 printk(KERN_INFO "board_id = %x\n", c->board_id); 4107#endif /* CCISS_DEBUG */ 4108 4109/* If the kernel supports MSI/MSI-X we will try to enable that functionality, 4110 * else we use the IO-APIC interrupt assigned to us by system ROM. 4111 */ 4112 cciss_interrupt_mode(c); 4113 err = cciss_pci_find_memory_BAR(c->pdev, &c->paddr); 4114 if (err) 4115 goto err_out_free_res; 4116 c->vaddr = remap_pci_mem(c->paddr, 0x250); 4117 if (!c->vaddr) { 4118 err = -ENOMEM; 4119 goto err_out_free_res; 4120 } 4121 err = cciss_wait_for_board_ready(c); 4122 if (err) 4123 goto err_out_free_res; 4124 err = cciss_find_cfgtables(c); 4125 if (err) 4126 goto err_out_free_res; 4127#ifdef CCISS_DEBUG 4128 print_cfg_table(c->cfgtable); 4129#endif /* CCISS_DEBUG */ 4130 4131 /* Some controllers support Zero Memory Raid (ZMR). 4132 * When configured in ZMR mode the number of supported 4133 * commands drops to 64. So instead of just setting an 4134 * arbitrary value we make the driver a little smarter. 4135 * We read the config table to tell us how many commands 4136 * are supported on the controller then subtract 4 to 4137 * leave a little room for ioctl calls. 4138 */ 4139 c->max_commands = readl(&(c->cfgtable->MaxPerformantModeCommands)); 4140 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements)); 4141 4142 /* 4143 * Limit native command to 32 s/g elements to save dma'able memory. 4144 * Howvever spec says if 0, use 31 4145 */ 4146 4147 c->max_cmd_sgentries = 31; 4148 if (c->maxsgentries > 512) { 4149 c->max_cmd_sgentries = 32; 4150 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1; 4151 c->maxsgentries -= 1; /* account for chain pointer */ 4152 } else { 4153 c->maxsgentries = 31; /* Default to traditional value */ 4154 c->chainsize = 0; /* traditional */ 4155 } 4156 4157 c->nr_cmds = c->max_commands - 4; 4158 if ((readb(&c->cfgtable->Signature[0]) != 'C') || 4159 (readb(&c->cfgtable->Signature[1]) != 'I') || 4160 (readb(&c->cfgtable->Signature[2]) != 'S') || 4161 (readb(&c->cfgtable->Signature[3]) != 'S')) { 4162 printk("Does not appear to be a valid CISS config table\n"); 4163 err = -ENODEV; 4164 goto err_out_free_res; 4165 } 4166#ifdef CONFIG_X86 4167 { 4168 /* Need to enable prefetch in the SCSI core for 6400 in x86 */ 4169 __u32 prefetch; 4170 prefetch = readl(&(c->cfgtable->SCSI_Prefetch)); 4171 prefetch |= 0x100; 4172 writel(prefetch, &(c->cfgtable->SCSI_Prefetch)); 4173 } 4174#endif 4175 4176 /* Disabling DMA prefetch and refetch for the P600. 4177 * An ASIC bug may result in accesses to invalid memory addresses. 4178 * We've disabled prefetch for some time now. Testing with XEN 4179 * kernels revealed a bug in the refetch if dom0 resides on a P600. 4180 */ 4181 if (c->board_id == 0x3225103C) { 4182 __u32 dma_prefetch; 4183 __u32 dma_refetch; 4184 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG); 4185 dma_prefetch |= 0x8000; 4186 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG); 4187 pci_read_config_dword(c->pdev, PCI_COMMAND_PARITY, 4188 &dma_refetch); 4189 dma_refetch |= 0x1; 4190 pci_write_config_dword(c->pdev, PCI_COMMAND_PARITY, 4191 dma_refetch); 4192 } 4193 4194#ifdef CCISS_DEBUG 4195 printk(KERN_WARNING "Trying to put board into Performant mode\n"); 4196#endif /* CCISS_DEBUG */ 4197 cciss_put_controller_into_performant_mode(c); 4198 return 0; 4199 4200err_out_free_res: 4201 /* 4202 * Deliberately omit pci_disable_device(): it does something nasty to 4203 * Smart Array controllers that pci_enable_device does not undo 4204 */ 4205 if (c->transtable) 4206 iounmap(c->transtable); 4207 if (c->cfgtable) 4208 iounmap(c->cfgtable); 4209 if (c->vaddr) 4210 iounmap(c->vaddr); 4211 pci_release_regions(c->pdev); 4212 return err; 4213} 4214 4215/* Function to find the first free pointer into our hba[] array 4216 * Returns -1 if no free entries are left. 4217 */ 4218static int alloc_cciss_hba(void) 4219{ 4220 int i; 4221 4222 for (i = 0; i < MAX_CTLR; i++) { 4223 if (!hba[i]) { 4224 ctlr_info_t *p; 4225 4226 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); 4227 if (!p) 4228 goto Enomem; 4229 hba[i] = p; 4230 return i; 4231 } 4232 } 4233 printk(KERN_WARNING "cciss: This driver supports a maximum" 4234 " of %d controllers.\n", MAX_CTLR); 4235 return -1; 4236Enomem: 4237 printk(KERN_ERR "cciss: out of memory.\n"); 4238 return -1; 4239} 4240 4241static void free_hba(int n) 4242{ 4243 ctlr_info_t *h = hba[n]; 4244 int i; 4245 4246 hba[n] = NULL; 4247 for (i = 0; i < h->highest_lun + 1; i++) 4248 if (h->gendisk[i] != NULL) 4249 put_disk(h->gendisk[i]); 4250 kfree(h); 4251} 4252 4253/* Send a message CDB to the firmware. */ 4254static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) 4255{ 4256 typedef struct { 4257 CommandListHeader_struct CommandHeader; 4258 RequestBlock_struct Request; 4259 ErrDescriptor_struct ErrorDescriptor; 4260 } Command; 4261 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); 4262 Command *cmd; 4263 dma_addr_t paddr64; 4264 uint32_t paddr32, tag; 4265 void __iomem *vaddr; 4266 int i, err; 4267 4268 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 4269 if (vaddr == NULL) 4270 return -ENOMEM; 4271 4272 /* The Inbound Post Queue only accepts 32-bit physical addresses for the 4273 CCISS commands, so they must be allocated from the lower 4GiB of 4274 memory. */ 4275 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 4276 if (err) { 4277 iounmap(vaddr); 4278 return -ENOMEM; 4279 } 4280 4281 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); 4282 if (cmd == NULL) { 4283 iounmap(vaddr); 4284 return -ENOMEM; 4285 } 4286 4287 /* This must fit, because of the 32-bit consistent DMA mask. Also, 4288 although there's no guarantee, we assume that the address is at 4289 least 4-byte aligned (most likely, it's page-aligned). */ 4290 paddr32 = paddr64; 4291 4292 cmd->CommandHeader.ReplyQueue = 0; 4293 cmd->CommandHeader.SGList = 0; 4294 cmd->CommandHeader.SGTotal = 0; 4295 cmd->CommandHeader.Tag.lower = paddr32; 4296 cmd->CommandHeader.Tag.upper = 0; 4297 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); 4298 4299 cmd->Request.CDBLen = 16; 4300 cmd->Request.Type.Type = TYPE_MSG; 4301 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; 4302 cmd->Request.Type.Direction = XFER_NONE; 4303 cmd->Request.Timeout = 0; /* Don't time out */ 4304 cmd->Request.CDB[0] = opcode; 4305 cmd->Request.CDB[1] = type; 4306 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ 4307 4308 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); 4309 cmd->ErrorDescriptor.Addr.upper = 0; 4310 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); 4311 4312 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); 4313 4314 for (i = 0; i < 10; i++) { 4315 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); 4316 if ((tag & ~3) == paddr32) 4317 break; 4318 schedule_timeout_uninterruptible(HZ); 4319 } 4320 4321 iounmap(vaddr); 4322 4323 /* we leak the DMA buffer here ... no choice since the controller could 4324 still complete the command. */ 4325 if (i == 10) { 4326 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n", 4327 opcode, type); 4328 return -ETIMEDOUT; 4329 } 4330 4331 pci_free_consistent(pdev, cmd_sz, cmd, paddr64); 4332 4333 if (tag & 2) { 4334 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n", 4335 opcode, type); 4336 return -EIO; 4337 } 4338 4339 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n", 4340 opcode, type); 4341 return 0; 4342} 4343 4344#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0) 4345#define cciss_noop(p) cciss_message(p, 3, 0) 4346 4347static __devinit int cciss_reset_msi(struct pci_dev *pdev) 4348{ 4349/* the #defines are stolen from drivers/pci/msi.h. */ 4350#define msi_control_reg(base) (base + PCI_MSI_FLAGS) 4351#define PCI_MSIX_FLAGS_ENABLE (1 << 15) 4352 4353 int pos; 4354 u16 control = 0; 4355 4356 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); 4357 if (pos) { 4358 pci_read_config_word(pdev, msi_control_reg(pos), &control); 4359 if (control & PCI_MSI_FLAGS_ENABLE) { 4360 printk(KERN_INFO "cciss: resetting MSI\n"); 4361 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE); 4362 } 4363 } 4364 4365 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); 4366 if (pos) { 4367 pci_read_config_word(pdev, msi_control_reg(pos), &control); 4368 if (control & PCI_MSIX_FLAGS_ENABLE) { 4369 printk(KERN_INFO "cciss: resetting MSI-X\n"); 4370 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE); 4371 } 4372 } 4373 4374 return 0; 4375} 4376 4377/* This does a hard reset of the controller using PCI power management 4378 * states. */ 4379static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev) 4380{ 4381 u16 pmcsr, saved_config_space[32]; 4382 int i, pos; 4383 4384 printk(KERN_INFO "cciss: using PCI PM to reset controller\n"); 4385 4386 /* This is very nearly the same thing as 4387 4388 pci_save_state(pci_dev); 4389 pci_set_power_state(pci_dev, PCI_D3hot); 4390 pci_set_power_state(pci_dev, PCI_D0); 4391 pci_restore_state(pci_dev); 4392 4393 but we can't use these nice canned kernel routines on 4394 kexec, because they also check the MSI/MSI-X state in PCI 4395 configuration space and do the wrong thing when it is 4396 set/cleared. Also, the pci_save/restore_state functions 4397 violate the ordering requirements for restoring the 4398 configuration space from the CCISS document (see the 4399 comment below). So we roll our own .... */ 4400 4401 for (i = 0; i < 32; i++) 4402 pci_read_config_word(pdev, 2*i, &saved_config_space[i]); 4403 4404 pos = pci_find_capability(pdev, PCI_CAP_ID_PM); 4405 if (pos == 0) { 4406 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n"); 4407 return -ENODEV; 4408 } 4409 4410 /* Quoting from the Open CISS Specification: "The Power 4411 * Management Control/Status Register (CSR) controls the power 4412 * state of the device. The normal operating state is D0, 4413 * CSR=00h. The software off state is D3, CSR=03h. To reset 4414 * the controller, place the interface device in D3 then to 4415 * D0, this causes a secondary PCI reset which will reset the 4416 * controller." */ 4417 4418 /* enter the D3hot power management state */ 4419 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); 4420 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4421 pmcsr |= PCI_D3hot; 4422 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4423 4424 schedule_timeout_uninterruptible(HZ >> 1); 4425 4426 /* enter the D0 power management state */ 4427 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4428 pmcsr |= PCI_D0; 4429 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4430 4431 schedule_timeout_uninterruptible(HZ >> 1); 4432 4433 /* Restore the PCI configuration space. The Open CISS 4434 * Specification says, "Restore the PCI Configuration 4435 * Registers, offsets 00h through 60h. It is important to 4436 * restore the command register, 16-bits at offset 04h, 4437 * last. Do not restore the configuration status register, 4438 * 16-bits at offset 06h." Note that the offset is 2*i. */ 4439 for (i = 0; i < 32; i++) { 4440 if (i == 2 || i == 3) 4441 continue; 4442 pci_write_config_word(pdev, 2*i, saved_config_space[i]); 4443 } 4444 wmb(); 4445 pci_write_config_word(pdev, 4, saved_config_space[2]); 4446 4447 return 0; 4448} 4449 4450/* 4451 * This is it. Find all the controllers and register them. I really hate 4452 * stealing all these major device numbers. 4453 * returns the number of block devices registered. 4454 */ 4455static int __devinit cciss_init_one(struct pci_dev *pdev, 4456 const struct pci_device_id *ent) 4457{ 4458 int i; 4459 int j = 0; 4460 int k = 0; 4461 int rc; 4462 int dac, return_code; 4463 InquiryData_struct *inq_buff; 4464 4465 if (reset_devices) { 4466 /* Reset the controller with a PCI power-cycle */ 4467 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev)) 4468 return -ENODEV; 4469 4470 /* Now try to get the controller to respond to a no-op. Some 4471 devices (notably the HP Smart Array 5i Controller) need 4472 up to 30 seconds to respond. */ 4473 for (i=0; i<30; i++) { 4474 if (cciss_noop(pdev) == 0) 4475 break; 4476 4477 schedule_timeout_uninterruptible(HZ); 4478 } 4479 if (i == 30) { 4480 printk(KERN_ERR "cciss: controller seems dead\n"); 4481 return -EBUSY; 4482 } 4483 } 4484 4485 i = alloc_cciss_hba(); 4486 if (i < 0) 4487 return -1; 4488 4489 hba[i]->pdev = pdev; 4490 hba[i]->busy_initializing = 1; 4491 INIT_HLIST_HEAD(&hba[i]->cmpQ); 4492 INIT_HLIST_HEAD(&hba[i]->reqQ); 4493 mutex_init(&hba[i]->busy_shutting_down); 4494 4495 if (cciss_pci_init(hba[i]) != 0) 4496 goto clean_no_release_regions; 4497 4498 sprintf(hba[i]->devname, "cciss%d", i); 4499 hba[i]->ctlr = i; 4500 4501 init_completion(&hba[i]->scan_wait); 4502 4503 if (cciss_create_hba_sysfs_entry(hba[i])) 4504 goto clean0; 4505 4506 /* configure PCI DMA stuff */ 4507 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) 4508 dac = 1; 4509 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) 4510 dac = 0; 4511 else { 4512 printk(KERN_ERR "cciss: no suitable DMA available\n"); 4513 goto clean1; 4514 } 4515 4516 /* 4517 * register with the major number, or get a dynamic major number 4518 * by passing 0 as argument. This is done for greater than 4519 * 8 controller support. 4520 */ 4521 if (i < MAX_CTLR_ORIG) 4522 hba[i]->major = COMPAQ_CISS_MAJOR + i; 4523 rc = register_blkdev(hba[i]->major, hba[i]->devname); 4524 if (rc == -EBUSY || rc == -EINVAL) { 4525 printk(KERN_ERR 4526 "cciss: Unable to get major number %d for %s " 4527 "on hba %d\n", hba[i]->major, hba[i]->devname, i); 4528 goto clean1; 4529 } else { 4530 if (i >= MAX_CTLR_ORIG) 4531 hba[i]->major = rc; 4532 } 4533 4534 /* make sure the board interrupts are off */ 4535 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF); 4536 if (hba[i]->msi_vector || hba[i]->msix_vector) { 4537 if (request_irq(hba[i]->intr[PERF_MODE_INT], 4538 do_cciss_msix_intr, 4539 IRQF_DISABLED, hba[i]->devname, hba[i])) { 4540 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n", 4541 hba[i]->intr[PERF_MODE_INT], hba[i]->devname); 4542 goto clean2; 4543 } 4544 } else { 4545 if (request_irq(hba[i]->intr[PERF_MODE_INT], do_cciss_intx, 4546 IRQF_DISABLED, hba[i]->devname, hba[i])) { 4547 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n", 4548 hba[i]->intr[PERF_MODE_INT], hba[i]->devname); 4549 goto clean2; 4550 } 4551 } 4552 4553 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n", 4554 hba[i]->devname, pdev->device, pci_name(pdev), 4555 hba[i]->intr[PERF_MODE_INT], dac ? "" : " not"); 4556 4557 hba[i]->cmd_pool_bits = 4558 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4559 * sizeof(unsigned long), GFP_KERNEL); 4560 hba[i]->cmd_pool = (CommandList_struct *) 4561 pci_alloc_consistent(hba[i]->pdev, 4562 hba[i]->nr_cmds * sizeof(CommandList_struct), 4563 &(hba[i]->cmd_pool_dhandle)); 4564 hba[i]->errinfo_pool = (ErrorInfo_struct *) 4565 pci_alloc_consistent(hba[i]->pdev, 4566 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4567 &(hba[i]->errinfo_pool_dhandle)); 4568 if ((hba[i]->cmd_pool_bits == NULL) 4569 || (hba[i]->cmd_pool == NULL) 4570 || (hba[i]->errinfo_pool == NULL)) { 4571 printk(KERN_ERR "cciss: out of memory"); 4572 goto clean4; 4573 } 4574 4575 /* Need space for temp scatter list */ 4576 hba[i]->scatter_list = kmalloc(hba[i]->max_commands * 4577 sizeof(struct scatterlist *), 4578 GFP_KERNEL); 4579 for (k = 0; k < hba[i]->nr_cmds; k++) { 4580 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) * 4581 hba[i]->maxsgentries, 4582 GFP_KERNEL); 4583 if (hba[i]->scatter_list[k] == NULL) { 4584 printk(KERN_ERR "cciss%d: could not allocate " 4585 "s/g lists\n", i); 4586 goto clean4; 4587 } 4588 } 4589 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i], 4590 hba[i]->chainsize, hba[i]->nr_cmds); 4591 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0) 4592 goto clean4; 4593 4594 spin_lock_init(&hba[i]->lock); 4595 4596 /* Initialize the pdev driver private data. 4597 have it point to hba[i]. */ 4598 pci_set_drvdata(pdev, hba[i]); 4599 /* command and error info recs zeroed out before 4600 they are used */ 4601 memset(hba[i]->cmd_pool_bits, 0, 4602 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4603 * sizeof(unsigned long)); 4604 4605 hba[i]->num_luns = 0; 4606 hba[i]->highest_lun = -1; 4607 for (j = 0; j < CISS_MAX_LUN; j++) { 4608 hba[i]->drv[j] = NULL; 4609 hba[i]->gendisk[j] = NULL; 4610 } 4611 4612 cciss_scsi_setup(i); 4613 4614 /* Turn the interrupts on so we can service requests */ 4615 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON); 4616 4617 /* Get the firmware version */ 4618 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 4619 if (inq_buff == NULL) { 4620 printk(KERN_ERR "cciss: out of memory\n"); 4621 goto clean4; 4622 } 4623 4624 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff, 4625 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD); 4626 if (return_code == IO_OK) { 4627 hba[i]->firm_ver[0] = inq_buff->data_byte[32]; 4628 hba[i]->firm_ver[1] = inq_buff->data_byte[33]; 4629 hba[i]->firm_ver[2] = inq_buff->data_byte[34]; 4630 hba[i]->firm_ver[3] = inq_buff->data_byte[35]; 4631 } else { /* send command failed */ 4632 printk(KERN_WARNING "cciss: unable to determine firmware" 4633 " version of controller\n"); 4634 } 4635 kfree(inq_buff); 4636 4637 cciss_procinit(i); 4638 4639 hba[i]->cciss_max_sectors = 8192; 4640 4641 rebuild_lun_table(hba[i], 1, 0); 4642 hba[i]->busy_initializing = 0; 4643 return 1; 4644 4645clean4: 4646 kfree(hba[i]->cmd_pool_bits); 4647 /* Free up sg elements */ 4648 for (k = 0; k < hba[i]->nr_cmds; k++) 4649 kfree(hba[i]->scatter_list[k]); 4650 kfree(hba[i]->scatter_list); 4651 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds); 4652 if (hba[i]->cmd_pool) 4653 pci_free_consistent(hba[i]->pdev, 4654 hba[i]->nr_cmds * sizeof(CommandList_struct), 4655 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4656 if (hba[i]->errinfo_pool) 4657 pci_free_consistent(hba[i]->pdev, 4658 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4659 hba[i]->errinfo_pool, 4660 hba[i]->errinfo_pool_dhandle); 4661 free_irq(hba[i]->intr[PERF_MODE_INT], hba[i]); 4662clean2: 4663 unregister_blkdev(hba[i]->major, hba[i]->devname); 4664clean1: 4665 cciss_destroy_hba_sysfs_entry(hba[i]); 4666clean0: 4667 pci_release_regions(pdev); 4668clean_no_release_regions: 4669 hba[i]->busy_initializing = 0; 4670 4671 /* 4672 * Deliberately omit pci_disable_device(): it does something nasty to 4673 * Smart Array controllers that pci_enable_device does not undo 4674 */ 4675 pci_set_drvdata(pdev, NULL); 4676 free_hba(i); 4677 return -1; 4678} 4679 4680static void cciss_shutdown(struct pci_dev *pdev) 4681{ 4682 ctlr_info_t *h; 4683 char *flush_buf; 4684 int return_code; 4685 4686 h = pci_get_drvdata(pdev); 4687 flush_buf = kzalloc(4, GFP_KERNEL); 4688 if (!flush_buf) { 4689 printk(KERN_WARNING 4690 "cciss:%d cache not flushed, out of memory.\n", 4691 h->ctlr); 4692 return; 4693 } 4694 /* write all data in the battery backed cache to disk */ 4695 memset(flush_buf, 0, 4); 4696 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf, 4697 4, 0, CTLR_LUNID, TYPE_CMD); 4698 kfree(flush_buf); 4699 if (return_code != IO_OK) 4700 printk(KERN_WARNING "cciss%d: Error flushing cache\n", 4701 h->ctlr); 4702 h->access.set_intr_mask(h, CCISS_INTR_OFF); 4703 free_irq(h->intr[PERF_MODE_INT], h); 4704} 4705 4706static void __devexit cciss_remove_one(struct pci_dev *pdev) 4707{ 4708 ctlr_info_t *tmp_ptr; 4709 int i, j; 4710 4711 if (pci_get_drvdata(pdev) == NULL) { 4712 printk(KERN_ERR "cciss: Unable to remove device \n"); 4713 return; 4714 } 4715 4716 tmp_ptr = pci_get_drvdata(pdev); 4717 i = tmp_ptr->ctlr; 4718 if (hba[i] == NULL) { 4719 printk(KERN_ERR "cciss: device appears to " 4720 "already be removed \n"); 4721 return; 4722 } 4723 4724 mutex_lock(&hba[i]->busy_shutting_down); 4725 4726 remove_from_scan_list(hba[i]); 4727 remove_proc_entry(hba[i]->devname, proc_cciss); 4728 unregister_blkdev(hba[i]->major, hba[i]->devname); 4729 4730 /* remove it from the disk list */ 4731 for (j = 0; j < CISS_MAX_LUN; j++) { 4732 struct gendisk *disk = hba[i]->gendisk[j]; 4733 if (disk) { 4734 struct request_queue *q = disk->queue; 4735 4736 if (disk->flags & GENHD_FL_UP) { 4737 cciss_destroy_ld_sysfs_entry(hba[i], j, 1); 4738 del_gendisk(disk); 4739 } 4740 if (q) 4741 blk_cleanup_queue(q); 4742 } 4743 } 4744 4745#ifdef CONFIG_CISS_SCSI_TAPE 4746 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */ 4747#endif 4748 4749 cciss_shutdown(pdev); 4750 4751#ifdef CONFIG_PCI_MSI 4752 if (hba[i]->msix_vector) 4753 pci_disable_msix(hba[i]->pdev); 4754 else if (hba[i]->msi_vector) 4755 pci_disable_msi(hba[i]->pdev); 4756#endif /* CONFIG_PCI_MSI */ 4757 4758 iounmap(hba[i]->transtable); 4759 iounmap(hba[i]->cfgtable); 4760 iounmap(hba[i]->vaddr); 4761 4762 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct), 4763 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4764 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4765 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle); 4766 kfree(hba[i]->cmd_pool_bits); 4767 /* Free up sg elements */ 4768 for (j = 0; j < hba[i]->nr_cmds; j++) 4769 kfree(hba[i]->scatter_list[j]); 4770 kfree(hba[i]->scatter_list); 4771 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds); 4772 /* 4773 * Deliberately omit pci_disable_device(): it does something nasty to 4774 * Smart Array controllers that pci_enable_device does not undo 4775 */ 4776 pci_release_regions(pdev); 4777 pci_set_drvdata(pdev, NULL); 4778 cciss_destroy_hba_sysfs_entry(hba[i]); 4779 mutex_unlock(&hba[i]->busy_shutting_down); 4780 free_hba(i); 4781} 4782 4783static struct pci_driver cciss_pci_driver = { 4784 .name = "cciss", 4785 .probe = cciss_init_one, 4786 .remove = __devexit_p(cciss_remove_one), 4787 .id_table = cciss_pci_device_id, /* id_table */ 4788 .shutdown = cciss_shutdown, 4789}; 4790 4791/* 4792 * This is it. Register the PCI driver information for the cards we control 4793 * the OS will call our registered routines when it finds one of our cards. 4794 */ 4795static int __init cciss_init(void) 4796{ 4797 int err; 4798 4799 /* 4800 * The hardware requires that commands are aligned on a 64-bit 4801 * boundary. Given that we use pci_alloc_consistent() to allocate an 4802 * array of them, the size must be a multiple of 8 bytes. 4803 */ 4804 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT); 4805 printk(KERN_INFO DRIVER_NAME "\n"); 4806 4807 err = bus_register(&cciss_bus_type); 4808 if (err) 4809 return err; 4810 4811 /* Start the scan thread */ 4812 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan"); 4813 if (IS_ERR(cciss_scan_thread)) { 4814 err = PTR_ERR(cciss_scan_thread); 4815 goto err_bus_unregister; 4816 } 4817 4818 /* Register for our PCI devices */ 4819 err = pci_register_driver(&cciss_pci_driver); 4820 if (err) 4821 goto err_thread_stop; 4822 4823 return err; 4824 4825err_thread_stop: 4826 kthread_stop(cciss_scan_thread); 4827err_bus_unregister: 4828 bus_unregister(&cciss_bus_type); 4829 4830 return err; 4831} 4832 4833static void __exit cciss_cleanup(void) 4834{ 4835 int i; 4836 4837 pci_unregister_driver(&cciss_pci_driver); 4838 /* double check that all controller entrys have been removed */ 4839 for (i = 0; i < MAX_CTLR; i++) { 4840 if (hba[i] != NULL) { 4841 printk(KERN_WARNING "cciss: had to remove" 4842 " controller %d\n", i); 4843 cciss_remove_one(hba[i]->pdev); 4844 } 4845 } 4846 kthread_stop(cciss_scan_thread); 4847 remove_proc_entry("driver/cciss", NULL); 4848 bus_unregister(&cciss_bus_type); 4849} 4850 4851module_init(cciss_init); 4852module_exit(cciss_cleanup); 4853