cciss.c revision da0021841c3ea6a82588efae3260015847ea5d33
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 3.6.20)" 60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20) 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 SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400" 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m" 67 " Smart Array G2 Series SAS/SATA Controllers"); 68MODULE_VERSION("3.6.20"); 69MODULE_LICENSE("GPL"); 70 71static int cciss_allow_hpsa; 72module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR); 73MODULE_PARM_DESC(cciss_allow_hpsa, 74 "Prevent cciss driver from accessing hardware known to be " 75 " supported by the hpsa driver"); 76 77#include "cciss_cmd.h" 78#include "cciss.h" 79#include <linux/cciss_ioctl.h> 80 81/* define the PCI info for the cards we can control */ 82static const struct pci_device_id cciss_pci_device_id[] = { 83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070}, 84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080}, 85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082}, 86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083}, 87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091}, 88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A}, 89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B}, 90 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C}, 91 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D}, 92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225}, 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223}, 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234}, 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235}, 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211}, 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212}, 98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213}, 99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214}, 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215}, 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237}, 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D}, 103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241}, 104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243}, 105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245}, 106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247}, 107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249}, 108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A}, 109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B}, 110 {0,} 111}; 112 113MODULE_DEVICE_TABLE(pci, cciss_pci_device_id); 114 115/* board_id = Subsystem Device ID & Vendor ID 116 * product = Marketing Name for the board 117 * access = Address of the struct of function pointers 118 */ 119static struct board_type products[] = { 120 {0x40700E11, "Smart Array 5300", &SA5_access}, 121 {0x40800E11, "Smart Array 5i", &SA5B_access}, 122 {0x40820E11, "Smart Array 532", &SA5B_access}, 123 {0x40830E11, "Smart Array 5312", &SA5B_access}, 124 {0x409A0E11, "Smart Array 641", &SA5_access}, 125 {0x409B0E11, "Smart Array 642", &SA5_access}, 126 {0x409C0E11, "Smart Array 6400", &SA5_access}, 127 {0x409D0E11, "Smart Array 6400 EM", &SA5_access}, 128 {0x40910E11, "Smart Array 6i", &SA5_access}, 129 {0x3225103C, "Smart Array P600", &SA5_access}, 130 {0x3235103C, "Smart Array P400i", &SA5_access}, 131 {0x3211103C, "Smart Array E200i", &SA5_access}, 132 {0x3212103C, "Smart Array E200", &SA5_access}, 133 {0x3213103C, "Smart Array E200i", &SA5_access}, 134 {0x3214103C, "Smart Array E200i", &SA5_access}, 135 {0x3215103C, "Smart Array E200i", &SA5_access}, 136 {0x3237103C, "Smart Array E500", &SA5_access}, 137/* controllers below this line are also supported by the hpsa driver. */ 138#define HPSA_BOUNDARY 0x3223103C 139 {0x3223103C, "Smart Array P800", &SA5_access}, 140 {0x3234103C, "Smart Array P400", &SA5_access}, 141 {0x323D103C, "Smart Array P700m", &SA5_access}, 142 {0x3241103C, "Smart Array P212", &SA5_access}, 143 {0x3243103C, "Smart Array P410", &SA5_access}, 144 {0x3245103C, "Smart Array P410i", &SA5_access}, 145 {0x3247103C, "Smart Array P411", &SA5_access}, 146 {0x3249103C, "Smart Array P812", &SA5_access}, 147 {0x324A103C, "Smart Array P712m", &SA5_access}, 148 {0x324B103C, "Smart Array P711m", &SA5_access}, 149}; 150 151/* How long to wait (in milliseconds) for board to go into simple mode */ 152#define MAX_CONFIG_WAIT 30000 153#define MAX_IOCTL_CONFIG_WAIT 1000 154 155/*define how many times we will try a command because of bus resets */ 156#define MAX_CMD_RETRIES 3 157 158#define MAX_CTLR 32 159 160/* Originally cciss driver only supports 8 major numbers */ 161#define MAX_CTLR_ORIG 8 162 163static ctlr_info_t *hba[MAX_CTLR]; 164 165static struct task_struct *cciss_scan_thread; 166static DEFINE_MUTEX(scan_mutex); 167static LIST_HEAD(scan_q); 168 169static void do_cciss_request(struct request_queue *q); 170static irqreturn_t do_cciss_intr(int irq, void *dev_id); 171static int cciss_open(struct block_device *bdev, fmode_t mode); 172static int cciss_release(struct gendisk *disk, fmode_t mode); 173static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 174 unsigned int cmd, unsigned long arg); 175static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); 176 177static int cciss_revalidate(struct gendisk *disk); 178static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl); 179static int deregister_disk(ctlr_info_t *h, int drv_index, 180 int clear_all, int via_ioctl); 181 182static void cciss_read_capacity(int ctlr, int logvol, 183 sector_t *total_size, unsigned int *block_size); 184static void cciss_read_capacity_16(int ctlr, int logvol, 185 sector_t *total_size, unsigned int *block_size); 186static void cciss_geometry_inquiry(int ctlr, int logvol, 187 sector_t total_size, 188 unsigned int block_size, InquiryData_struct *inq_buff, 189 drive_info_struct *drv); 190static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *, 191 __u32); 192static void start_io(ctlr_info_t *h); 193static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 194 __u8 page_code, unsigned char scsi3addr[], 195 int cmd_type); 196static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 197 int attempt_retry); 198static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c); 199 200static void fail_all_cmds(unsigned long ctlr); 201static int add_to_scan_list(struct ctlr_info *h); 202static int scan_thread(void *data); 203static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c); 204static void cciss_hba_release(struct device *dev); 205static void cciss_device_release(struct device *dev); 206static void cciss_free_gendisk(ctlr_info_t *h, int drv_index); 207static void cciss_free_drive_info(ctlr_info_t *h, int drv_index); 208 209#ifdef CONFIG_PROC_FS 210static void cciss_procinit(int i); 211#else 212static void cciss_procinit(int i) 213{ 214} 215#endif /* CONFIG_PROC_FS */ 216 217#ifdef CONFIG_COMPAT 218static int cciss_compat_ioctl(struct block_device *, fmode_t, 219 unsigned, unsigned long); 220#endif 221 222static const struct block_device_operations cciss_fops = { 223 .owner = THIS_MODULE, 224 .open = cciss_open, 225 .release = cciss_release, 226 .locked_ioctl = cciss_ioctl, 227 .getgeo = cciss_getgeo, 228#ifdef CONFIG_COMPAT 229 .compat_ioctl = cciss_compat_ioctl, 230#endif 231 .revalidate_disk = cciss_revalidate, 232}; 233 234/* 235 * Enqueuing and dequeuing functions for cmdlists. 236 */ 237static inline void addQ(struct hlist_head *list, CommandList_struct *c) 238{ 239 hlist_add_head(&c->list, list); 240} 241 242static inline void removeQ(CommandList_struct *c) 243{ 244 /* 245 * After kexec/dump some commands might still 246 * be in flight, which the firmware will try 247 * to complete. Resetting the firmware doesn't work 248 * with old fw revisions, so we have to mark 249 * them off as 'stale' to prevent the driver from 250 * falling over. 251 */ 252 if (WARN_ON(hlist_unhashed(&c->list))) { 253 c->cmd_type = CMD_MSG_STALE; 254 return; 255 } 256 257 hlist_del_init(&c->list); 258} 259 260#include "cciss_scsi.c" /* For SCSI tape support */ 261 262static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", 263 "UNKNOWN" 264}; 265#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1) 266 267#ifdef CONFIG_PROC_FS 268 269/* 270 * Report information about this controller. 271 */ 272#define ENG_GIG 1000000000 273#define ENG_GIG_FACTOR (ENG_GIG/512) 274#define ENGAGE_SCSI "engage scsi" 275 276static struct proc_dir_entry *proc_cciss; 277 278static void cciss_seq_show_header(struct seq_file *seq) 279{ 280 ctlr_info_t *h = seq->private; 281 282 seq_printf(seq, "%s: HP %s Controller\n" 283 "Board ID: 0x%08lx\n" 284 "Firmware Version: %c%c%c%c\n" 285 "IRQ: %d\n" 286 "Logical drives: %d\n" 287 "Current Q depth: %d\n" 288 "Current # commands on controller: %d\n" 289 "Max Q depth since init: %d\n" 290 "Max # commands on controller since init: %d\n" 291 "Max SG entries since init: %d\n", 292 h->devname, 293 h->product_name, 294 (unsigned long)h->board_id, 295 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], 296 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT], 297 h->num_luns, 298 h->Qdepth, h->commands_outstanding, 299 h->maxQsinceinit, h->max_outstanding, h->maxSG); 300 301#ifdef CONFIG_CISS_SCSI_TAPE 302 cciss_seq_tape_report(seq, h->ctlr); 303#endif /* CONFIG_CISS_SCSI_TAPE */ 304} 305 306static void *cciss_seq_start(struct seq_file *seq, loff_t *pos) 307{ 308 ctlr_info_t *h = seq->private; 309 unsigned ctlr = h->ctlr; 310 unsigned long flags; 311 312 /* prevent displaying bogus info during configuration 313 * or deconfiguration of a logical volume 314 */ 315 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 316 if (h->busy_configuring) { 317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 318 return ERR_PTR(-EBUSY); 319 } 320 h->busy_configuring = 1; 321 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 322 323 if (*pos == 0) 324 cciss_seq_show_header(seq); 325 326 return pos; 327} 328 329static int cciss_seq_show(struct seq_file *seq, void *v) 330{ 331 sector_t vol_sz, vol_sz_frac; 332 ctlr_info_t *h = seq->private; 333 unsigned ctlr = h->ctlr; 334 loff_t *pos = v; 335 drive_info_struct *drv = h->drv[*pos]; 336 337 if (*pos > h->highest_lun) 338 return 0; 339 340 if (drv->heads == 0) 341 return 0; 342 343 vol_sz = drv->nr_blocks; 344 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR); 345 vol_sz_frac *= 100; 346 sector_div(vol_sz_frac, ENG_GIG_FACTOR); 347 348 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN) 349 drv->raid_level = RAID_UNKNOWN; 350 seq_printf(seq, "cciss/c%dd%d:" 351 "\t%4u.%02uGB\tRAID %s\n", 352 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac, 353 raid_label[drv->raid_level]); 354 return 0; 355} 356 357static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos) 358{ 359 ctlr_info_t *h = seq->private; 360 361 if (*pos > h->highest_lun) 362 return NULL; 363 *pos += 1; 364 365 return pos; 366} 367 368static void cciss_seq_stop(struct seq_file *seq, void *v) 369{ 370 ctlr_info_t *h = seq->private; 371 372 /* Only reset h->busy_configuring if we succeeded in setting 373 * it during cciss_seq_start. */ 374 if (v == ERR_PTR(-EBUSY)) 375 return; 376 377 h->busy_configuring = 0; 378} 379 380static const struct seq_operations cciss_seq_ops = { 381 .start = cciss_seq_start, 382 .show = cciss_seq_show, 383 .next = cciss_seq_next, 384 .stop = cciss_seq_stop, 385}; 386 387static int cciss_seq_open(struct inode *inode, struct file *file) 388{ 389 int ret = seq_open(file, &cciss_seq_ops); 390 struct seq_file *seq = file->private_data; 391 392 if (!ret) 393 seq->private = PDE(inode)->data; 394 395 return ret; 396} 397 398static ssize_t 399cciss_proc_write(struct file *file, const char __user *buf, 400 size_t length, loff_t *ppos) 401{ 402 int err; 403 char *buffer; 404 405#ifndef CONFIG_CISS_SCSI_TAPE 406 return -EINVAL; 407#endif 408 409 if (!buf || length > PAGE_SIZE - 1) 410 return -EINVAL; 411 412 buffer = (char *)__get_free_page(GFP_KERNEL); 413 if (!buffer) 414 return -ENOMEM; 415 416 err = -EFAULT; 417 if (copy_from_user(buffer, buf, length)) 418 goto out; 419 buffer[length] = '\0'; 420 421#ifdef CONFIG_CISS_SCSI_TAPE 422 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) { 423 struct seq_file *seq = file->private_data; 424 ctlr_info_t *h = seq->private; 425 int rc; 426 427 rc = cciss_engage_scsi(h->ctlr); 428 if (rc != 0) 429 err = -rc; 430 else 431 err = length; 432 } else 433#endif /* CONFIG_CISS_SCSI_TAPE */ 434 err = -EINVAL; 435 /* might be nice to have "disengage" too, but it's not 436 safely possible. (only 1 module use count, lock issues.) */ 437 438out: 439 free_page((unsigned long)buffer); 440 return err; 441} 442 443static const struct file_operations cciss_proc_fops = { 444 .owner = THIS_MODULE, 445 .open = cciss_seq_open, 446 .read = seq_read, 447 .llseek = seq_lseek, 448 .release = seq_release, 449 .write = cciss_proc_write, 450}; 451 452static void __devinit cciss_procinit(int i) 453{ 454 struct proc_dir_entry *pde; 455 456 if (proc_cciss == NULL) 457 proc_cciss = proc_mkdir("driver/cciss", NULL); 458 if (!proc_cciss) 459 return; 460 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP | 461 S_IROTH, proc_cciss, 462 &cciss_proc_fops, hba[i]); 463} 464#endif /* CONFIG_PROC_FS */ 465 466#define MAX_PRODUCT_NAME_LEN 19 467 468#define to_hba(n) container_of(n, struct ctlr_info, dev) 469#define to_drv(n) container_of(n, drive_info_struct, dev) 470 471static ssize_t host_store_rescan(struct device *dev, 472 struct device_attribute *attr, 473 const char *buf, size_t count) 474{ 475 struct ctlr_info *h = to_hba(dev); 476 477 add_to_scan_list(h); 478 wake_up_process(cciss_scan_thread); 479 wait_for_completion_interruptible(&h->scan_wait); 480 481 return count; 482} 483static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); 484 485static ssize_t dev_show_unique_id(struct device *dev, 486 struct device_attribute *attr, 487 char *buf) 488{ 489 drive_info_struct *drv = to_drv(dev); 490 struct ctlr_info *h = to_hba(drv->dev.parent); 491 __u8 sn[16]; 492 unsigned long flags; 493 int ret = 0; 494 495 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 496 if (h->busy_configuring) 497 ret = -EBUSY; 498 else 499 memcpy(sn, drv->serial_no, sizeof(sn)); 500 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 501 502 if (ret) 503 return ret; 504 else 505 return snprintf(buf, 16 * 2 + 2, 506 "%02X%02X%02X%02X%02X%02X%02X%02X" 507 "%02X%02X%02X%02X%02X%02X%02X%02X\n", 508 sn[0], sn[1], sn[2], sn[3], 509 sn[4], sn[5], sn[6], sn[7], 510 sn[8], sn[9], sn[10], sn[11], 511 sn[12], sn[13], sn[14], sn[15]); 512} 513static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL); 514 515static ssize_t dev_show_vendor(struct device *dev, 516 struct device_attribute *attr, 517 char *buf) 518{ 519 drive_info_struct *drv = to_drv(dev); 520 struct ctlr_info *h = to_hba(drv->dev.parent); 521 char vendor[VENDOR_LEN + 1]; 522 unsigned long flags; 523 int ret = 0; 524 525 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 526 if (h->busy_configuring) 527 ret = -EBUSY; 528 else 529 memcpy(vendor, drv->vendor, VENDOR_LEN + 1); 530 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 531 532 if (ret) 533 return ret; 534 else 535 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor); 536} 537static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL); 538 539static ssize_t dev_show_model(struct device *dev, 540 struct device_attribute *attr, 541 char *buf) 542{ 543 drive_info_struct *drv = to_drv(dev); 544 struct ctlr_info *h = to_hba(drv->dev.parent); 545 char model[MODEL_LEN + 1]; 546 unsigned long flags; 547 int ret = 0; 548 549 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 550 if (h->busy_configuring) 551 ret = -EBUSY; 552 else 553 memcpy(model, drv->model, MODEL_LEN + 1); 554 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 555 556 if (ret) 557 return ret; 558 else 559 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model); 560} 561static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL); 562 563static ssize_t dev_show_rev(struct device *dev, 564 struct device_attribute *attr, 565 char *buf) 566{ 567 drive_info_struct *drv = to_drv(dev); 568 struct ctlr_info *h = to_hba(drv->dev.parent); 569 char rev[REV_LEN + 1]; 570 unsigned long flags; 571 int ret = 0; 572 573 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 574 if (h->busy_configuring) 575 ret = -EBUSY; 576 else 577 memcpy(rev, drv->rev, REV_LEN + 1); 578 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 579 580 if (ret) 581 return ret; 582 else 583 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev); 584} 585static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); 586 587static ssize_t cciss_show_lunid(struct device *dev, 588 struct device_attribute *attr, char *buf) 589{ 590 drive_info_struct *drv = to_drv(dev); 591 struct ctlr_info *h = to_hba(drv->dev.parent); 592 unsigned long flags; 593 unsigned char lunid[8]; 594 595 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 596 if (h->busy_configuring) { 597 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 598 return -EBUSY; 599 } 600 if (!drv->heads) { 601 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 602 return -ENOTTY; 603 } 604 memcpy(lunid, drv->LunID, sizeof(lunid)); 605 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 606 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 607 lunid[0], lunid[1], lunid[2], lunid[3], 608 lunid[4], lunid[5], lunid[6], lunid[7]); 609} 610static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); 611 612static ssize_t cciss_show_raid_level(struct device *dev, 613 struct device_attribute *attr, char *buf) 614{ 615 drive_info_struct *drv = to_drv(dev); 616 struct ctlr_info *h = to_hba(drv->dev.parent); 617 int raid; 618 unsigned long flags; 619 620 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 621 if (h->busy_configuring) { 622 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 623 return -EBUSY; 624 } 625 raid = drv->raid_level; 626 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 627 if (raid < 0 || raid > RAID_UNKNOWN) 628 raid = RAID_UNKNOWN; 629 630 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n", 631 raid_label[raid]); 632} 633static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL); 634 635static ssize_t cciss_show_usage_count(struct device *dev, 636 struct device_attribute *attr, char *buf) 637{ 638 drive_info_struct *drv = to_drv(dev); 639 struct ctlr_info *h = to_hba(drv->dev.parent); 640 unsigned long flags; 641 int count; 642 643 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 644 if (h->busy_configuring) { 645 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 646 return -EBUSY; 647 } 648 count = drv->usage_count; 649 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 650 return snprintf(buf, 20, "%d\n", count); 651} 652static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); 653 654static struct attribute *cciss_host_attrs[] = { 655 &dev_attr_rescan.attr, 656 NULL 657}; 658 659static struct attribute_group cciss_host_attr_group = { 660 .attrs = cciss_host_attrs, 661}; 662 663static const struct attribute_group *cciss_host_attr_groups[] = { 664 &cciss_host_attr_group, 665 NULL 666}; 667 668static struct device_type cciss_host_type = { 669 .name = "cciss_host", 670 .groups = cciss_host_attr_groups, 671 .release = cciss_hba_release, 672}; 673 674static struct attribute *cciss_dev_attrs[] = { 675 &dev_attr_unique_id.attr, 676 &dev_attr_model.attr, 677 &dev_attr_vendor.attr, 678 &dev_attr_rev.attr, 679 &dev_attr_lunid.attr, 680 &dev_attr_raid_level.attr, 681 &dev_attr_usage_count.attr, 682 NULL 683}; 684 685static struct attribute_group cciss_dev_attr_group = { 686 .attrs = cciss_dev_attrs, 687}; 688 689static const struct attribute_group *cciss_dev_attr_groups[] = { 690 &cciss_dev_attr_group, 691 NULL 692}; 693 694static struct device_type cciss_dev_type = { 695 .name = "cciss_device", 696 .groups = cciss_dev_attr_groups, 697 .release = cciss_device_release, 698}; 699 700static struct bus_type cciss_bus_type = { 701 .name = "cciss", 702}; 703 704/* 705 * cciss_hba_release is called when the reference count 706 * of h->dev goes to zero. 707 */ 708static void cciss_hba_release(struct device *dev) 709{ 710 /* 711 * nothing to do, but need this to avoid a warning 712 * about not having a release handler from lib/kref.c. 713 */ 714} 715 716/* 717 * Initialize sysfs entry for each controller. This sets up and registers 718 * the 'cciss#' directory for each individual controller under 719 * /sys/bus/pci/devices/<dev>/. 720 */ 721static int cciss_create_hba_sysfs_entry(struct ctlr_info *h) 722{ 723 device_initialize(&h->dev); 724 h->dev.type = &cciss_host_type; 725 h->dev.bus = &cciss_bus_type; 726 dev_set_name(&h->dev, "%s", h->devname); 727 h->dev.parent = &h->pdev->dev; 728 729 return device_add(&h->dev); 730} 731 732/* 733 * Remove sysfs entries for an hba. 734 */ 735static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h) 736{ 737 device_del(&h->dev); 738 put_device(&h->dev); /* final put. */ 739} 740 741/* cciss_device_release is called when the reference count 742 * of h->drv[x]dev goes to zero. 743 */ 744static void cciss_device_release(struct device *dev) 745{ 746 drive_info_struct *drv = to_drv(dev); 747 kfree(drv); 748} 749 750/* 751 * Initialize sysfs for each logical drive. This sets up and registers 752 * the 'c#d#' directory for each individual logical drive under 753 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from 754 * /sys/block/cciss!c#d# to this entry. 755 */ 756static long cciss_create_ld_sysfs_entry(struct ctlr_info *h, 757 int drv_index) 758{ 759 struct device *dev; 760 761 if (h->drv[drv_index]->device_initialized) 762 return 0; 763 764 dev = &h->drv[drv_index]->dev; 765 device_initialize(dev); 766 dev->type = &cciss_dev_type; 767 dev->bus = &cciss_bus_type; 768 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index); 769 dev->parent = &h->dev; 770 h->drv[drv_index]->device_initialized = 1; 771 return device_add(dev); 772} 773 774/* 775 * Remove sysfs entries for a logical drive. 776 */ 777static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index, 778 int ctlr_exiting) 779{ 780 struct device *dev = &h->drv[drv_index]->dev; 781 782 /* special case for c*d0, we only destroy it on controller exit */ 783 if (drv_index == 0 && !ctlr_exiting) 784 return; 785 786 device_del(dev); 787 put_device(dev); /* the "final" put. */ 788 h->drv[drv_index] = NULL; 789} 790 791/* 792 * For operations that cannot sleep, a command block is allocated at init, 793 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track 794 * which ones are free or in use. For operations that can wait for kmalloc 795 * to possible sleep, this routine can be called with get_from_pool set to 0. 796 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was. 797 */ 798static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool) 799{ 800 CommandList_struct *c; 801 int i; 802 u64bit temp64; 803 dma_addr_t cmd_dma_handle, err_dma_handle; 804 805 if (!get_from_pool) { 806 c = (CommandList_struct *) pci_alloc_consistent(h->pdev, 807 sizeof(CommandList_struct), &cmd_dma_handle); 808 if (c == NULL) 809 return NULL; 810 memset(c, 0, sizeof(CommandList_struct)); 811 812 c->cmdindex = -1; 813 814 c->err_info = (ErrorInfo_struct *) 815 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct), 816 &err_dma_handle); 817 818 if (c->err_info == NULL) { 819 pci_free_consistent(h->pdev, 820 sizeof(CommandList_struct), c, cmd_dma_handle); 821 return NULL; 822 } 823 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 824 } else { /* get it out of the controllers pool */ 825 826 do { 827 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); 828 if (i == h->nr_cmds) 829 return NULL; 830 } while (test_and_set_bit 831 (i & (BITS_PER_LONG - 1), 832 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); 833#ifdef CCISS_DEBUG 834 printk(KERN_DEBUG "cciss: using command buffer %d\n", i); 835#endif 836 c = h->cmd_pool + i; 837 memset(c, 0, sizeof(CommandList_struct)); 838 cmd_dma_handle = h->cmd_pool_dhandle 839 + i * sizeof(CommandList_struct); 840 c->err_info = h->errinfo_pool + i; 841 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 842 err_dma_handle = h->errinfo_pool_dhandle 843 + i * sizeof(ErrorInfo_struct); 844 h->nr_allocs++; 845 846 c->cmdindex = i; 847 } 848 849 INIT_HLIST_NODE(&c->list); 850 c->busaddr = (__u32) cmd_dma_handle; 851 temp64.val = (__u64) err_dma_handle; 852 c->ErrDesc.Addr.lower = temp64.val32.lower; 853 c->ErrDesc.Addr.upper = temp64.val32.upper; 854 c->ErrDesc.Len = sizeof(ErrorInfo_struct); 855 856 c->ctlr = h->ctlr; 857 return c; 858} 859 860/* 861 * Frees a command block that was previously allocated with cmd_alloc(). 862 */ 863static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool) 864{ 865 int i; 866 u64bit temp64; 867 868 if (!got_from_pool) { 869 temp64.val32.lower = c->ErrDesc.Addr.lower; 870 temp64.val32.upper = c->ErrDesc.Addr.upper; 871 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct), 872 c->err_info, (dma_addr_t) temp64.val); 873 pci_free_consistent(h->pdev, sizeof(CommandList_struct), 874 c, (dma_addr_t) c->busaddr); 875 } else { 876 i = c - h->cmd_pool; 877 clear_bit(i & (BITS_PER_LONG - 1), 878 h->cmd_pool_bits + (i / BITS_PER_LONG)); 879 h->nr_frees++; 880 } 881} 882 883static inline ctlr_info_t *get_host(struct gendisk *disk) 884{ 885 return disk->queue->queuedata; 886} 887 888static inline drive_info_struct *get_drv(struct gendisk *disk) 889{ 890 return disk->private_data; 891} 892 893/* 894 * Open. Make sure the device is really there. 895 */ 896static int cciss_open(struct block_device *bdev, fmode_t mode) 897{ 898 ctlr_info_t *host = get_host(bdev->bd_disk); 899 drive_info_struct *drv = get_drv(bdev->bd_disk); 900 901#ifdef CCISS_DEBUG 902 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name); 903#endif /* CCISS_DEBUG */ 904 905 if (drv->busy_configuring) 906 return -EBUSY; 907 /* 908 * Root is allowed to open raw volume zero even if it's not configured 909 * so array config can still work. Root is also allowed to open any 910 * volume that has a LUN ID, so it can issue IOCTL to reread the 911 * disk information. I don't think I really like this 912 * but I'm already using way to many device nodes to claim another one 913 * for "raw controller". 914 */ 915 if (drv->heads == 0) { 916 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */ 917 /* if not node 0 make sure it is a partition = 0 */ 918 if (MINOR(bdev->bd_dev) & 0x0f) { 919 return -ENXIO; 920 /* if it is, make sure we have a LUN ID */ 921 } else if (memcmp(drv->LunID, CTLR_LUNID, 922 sizeof(drv->LunID))) { 923 return -ENXIO; 924 } 925 } 926 if (!capable(CAP_SYS_ADMIN)) 927 return -EPERM; 928 } 929 drv->usage_count++; 930 host->usage_count++; 931 return 0; 932} 933 934/* 935 * Close. Sync first. 936 */ 937static int cciss_release(struct gendisk *disk, fmode_t mode) 938{ 939 ctlr_info_t *host = get_host(disk); 940 drive_info_struct *drv = get_drv(disk); 941 942#ifdef CCISS_DEBUG 943 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name); 944#endif /* CCISS_DEBUG */ 945 946 drv->usage_count--; 947 host->usage_count--; 948 return 0; 949} 950 951#ifdef CONFIG_COMPAT 952 953static int do_ioctl(struct block_device *bdev, fmode_t mode, 954 unsigned cmd, unsigned long arg) 955{ 956 int ret; 957 lock_kernel(); 958 ret = cciss_ioctl(bdev, mode, cmd, arg); 959 unlock_kernel(); 960 return ret; 961} 962 963static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 964 unsigned cmd, unsigned long arg); 965static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 966 unsigned cmd, unsigned long arg); 967 968static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode, 969 unsigned cmd, unsigned long arg) 970{ 971 switch (cmd) { 972 case CCISS_GETPCIINFO: 973 case CCISS_GETINTINFO: 974 case CCISS_SETINTINFO: 975 case CCISS_GETNODENAME: 976 case CCISS_SETNODENAME: 977 case CCISS_GETHEARTBEAT: 978 case CCISS_GETBUSTYPES: 979 case CCISS_GETFIRMVER: 980 case CCISS_GETDRIVVER: 981 case CCISS_REVALIDVOLS: 982 case CCISS_DEREGDISK: 983 case CCISS_REGNEWDISK: 984 case CCISS_REGNEWD: 985 case CCISS_RESCANDISK: 986 case CCISS_GETLUNINFO: 987 return do_ioctl(bdev, mode, cmd, arg); 988 989 case CCISS_PASSTHRU32: 990 return cciss_ioctl32_passthru(bdev, mode, cmd, arg); 991 case CCISS_BIG_PASSTHRU32: 992 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg); 993 994 default: 995 return -ENOIOCTLCMD; 996 } 997} 998 999static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 1000 unsigned cmd, unsigned long arg) 1001{ 1002 IOCTL32_Command_struct __user *arg32 = 1003 (IOCTL32_Command_struct __user *) arg; 1004 IOCTL_Command_struct arg64; 1005 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); 1006 int err; 1007 u32 cp; 1008 1009 err = 0; 1010 err |= 1011 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 1012 sizeof(arg64.LUN_info)); 1013 err |= 1014 copy_from_user(&arg64.Request, &arg32->Request, 1015 sizeof(arg64.Request)); 1016 err |= 1017 copy_from_user(&arg64.error_info, &arg32->error_info, 1018 sizeof(arg64.error_info)); 1019 err |= get_user(arg64.buf_size, &arg32->buf_size); 1020 err |= get_user(cp, &arg32->buf); 1021 arg64.buf = compat_ptr(cp); 1022 err |= copy_to_user(p, &arg64, sizeof(arg64)); 1023 1024 if (err) 1025 return -EFAULT; 1026 1027 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p); 1028 if (err) 1029 return err; 1030 err |= 1031 copy_in_user(&arg32->error_info, &p->error_info, 1032 sizeof(arg32->error_info)); 1033 if (err) 1034 return -EFAULT; 1035 return err; 1036} 1037 1038static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 1039 unsigned cmd, unsigned long arg) 1040{ 1041 BIG_IOCTL32_Command_struct __user *arg32 = 1042 (BIG_IOCTL32_Command_struct __user *) arg; 1043 BIG_IOCTL_Command_struct arg64; 1044 BIG_IOCTL_Command_struct __user *p = 1045 compat_alloc_user_space(sizeof(arg64)); 1046 int err; 1047 u32 cp; 1048 1049 err = 0; 1050 err |= 1051 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 1052 sizeof(arg64.LUN_info)); 1053 err |= 1054 copy_from_user(&arg64.Request, &arg32->Request, 1055 sizeof(arg64.Request)); 1056 err |= 1057 copy_from_user(&arg64.error_info, &arg32->error_info, 1058 sizeof(arg64.error_info)); 1059 err |= get_user(arg64.buf_size, &arg32->buf_size); 1060 err |= get_user(arg64.malloc_size, &arg32->malloc_size); 1061 err |= get_user(cp, &arg32->buf); 1062 arg64.buf = compat_ptr(cp); 1063 err |= copy_to_user(p, &arg64, sizeof(arg64)); 1064 1065 if (err) 1066 return -EFAULT; 1067 1068 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p); 1069 if (err) 1070 return err; 1071 err |= 1072 copy_in_user(&arg32->error_info, &p->error_info, 1073 sizeof(arg32->error_info)); 1074 if (err) 1075 return -EFAULT; 1076 return err; 1077} 1078#endif 1079 1080static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1081{ 1082 drive_info_struct *drv = get_drv(bdev->bd_disk); 1083 1084 if (!drv->cylinders) 1085 return -ENXIO; 1086 1087 geo->heads = drv->heads; 1088 geo->sectors = drv->sectors; 1089 geo->cylinders = drv->cylinders; 1090 return 0; 1091} 1092 1093static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c) 1094{ 1095 if (c->err_info->CommandStatus == CMD_TARGET_STATUS && 1096 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) 1097 (void)check_for_unit_attention(host, c); 1098} 1099/* 1100 * ioctl 1101 */ 1102static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 1103 unsigned int cmd, unsigned long arg) 1104{ 1105 struct gendisk *disk = bdev->bd_disk; 1106 ctlr_info_t *host = get_host(disk); 1107 drive_info_struct *drv = get_drv(disk); 1108 int ctlr = host->ctlr; 1109 void __user *argp = (void __user *)arg; 1110 1111#ifdef CCISS_DEBUG 1112 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg); 1113#endif /* CCISS_DEBUG */ 1114 1115 switch (cmd) { 1116 case CCISS_GETPCIINFO: 1117 { 1118 cciss_pci_info_struct pciinfo; 1119 1120 if (!arg) 1121 return -EINVAL; 1122 pciinfo.domain = pci_domain_nr(host->pdev->bus); 1123 pciinfo.bus = host->pdev->bus->number; 1124 pciinfo.dev_fn = host->pdev->devfn; 1125 pciinfo.board_id = host->board_id; 1126 if (copy_to_user 1127 (argp, &pciinfo, sizeof(cciss_pci_info_struct))) 1128 return -EFAULT; 1129 return 0; 1130 } 1131 case CCISS_GETINTINFO: 1132 { 1133 cciss_coalint_struct intinfo; 1134 if (!arg) 1135 return -EINVAL; 1136 intinfo.delay = 1137 readl(&host->cfgtable->HostWrite.CoalIntDelay); 1138 intinfo.count = 1139 readl(&host->cfgtable->HostWrite.CoalIntCount); 1140 if (copy_to_user 1141 (argp, &intinfo, sizeof(cciss_coalint_struct))) 1142 return -EFAULT; 1143 return 0; 1144 } 1145 case CCISS_SETINTINFO: 1146 { 1147 cciss_coalint_struct intinfo; 1148 unsigned long flags; 1149 int i; 1150 1151 if (!arg) 1152 return -EINVAL; 1153 if (!capable(CAP_SYS_ADMIN)) 1154 return -EPERM; 1155 if (copy_from_user 1156 (&intinfo, argp, sizeof(cciss_coalint_struct))) 1157 return -EFAULT; 1158 if ((intinfo.delay == 0) && (intinfo.count == 0)) 1159 { 1160// printk("cciss_ioctl: delay and count cannot be 0\n"); 1161 return -EINVAL; 1162 } 1163 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1164 /* Update the field, and then ring the doorbell */ 1165 writel(intinfo.delay, 1166 &(host->cfgtable->HostWrite.CoalIntDelay)); 1167 writel(intinfo.count, 1168 &(host->cfgtable->HostWrite.CoalIntCount)); 1169 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1170 1171 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1172 if (!(readl(host->vaddr + SA5_DOORBELL) 1173 & CFGTBL_ChangeReq)) 1174 break; 1175 /* delay and try again */ 1176 udelay(1000); 1177 } 1178 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1179 if (i >= MAX_IOCTL_CONFIG_WAIT) 1180 return -EAGAIN; 1181 return 0; 1182 } 1183 case CCISS_GETNODENAME: 1184 { 1185 NodeName_type NodeName; 1186 int i; 1187 1188 if (!arg) 1189 return -EINVAL; 1190 for (i = 0; i < 16; i++) 1191 NodeName[i] = 1192 readb(&host->cfgtable->ServerName[i]); 1193 if (copy_to_user(argp, NodeName, sizeof(NodeName_type))) 1194 return -EFAULT; 1195 return 0; 1196 } 1197 case CCISS_SETNODENAME: 1198 { 1199 NodeName_type NodeName; 1200 unsigned long flags; 1201 int i; 1202 1203 if (!arg) 1204 return -EINVAL; 1205 if (!capable(CAP_SYS_ADMIN)) 1206 return -EPERM; 1207 1208 if (copy_from_user 1209 (NodeName, argp, sizeof(NodeName_type))) 1210 return -EFAULT; 1211 1212 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1213 1214 /* Update the field, and then ring the doorbell */ 1215 for (i = 0; i < 16; i++) 1216 writeb(NodeName[i], 1217 &host->cfgtable->ServerName[i]); 1218 1219 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1220 1221 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1222 if (!(readl(host->vaddr + SA5_DOORBELL) 1223 & CFGTBL_ChangeReq)) 1224 break; 1225 /* delay and try again */ 1226 udelay(1000); 1227 } 1228 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1229 if (i >= MAX_IOCTL_CONFIG_WAIT) 1230 return -EAGAIN; 1231 return 0; 1232 } 1233 1234 case CCISS_GETHEARTBEAT: 1235 { 1236 Heartbeat_type heartbeat; 1237 1238 if (!arg) 1239 return -EINVAL; 1240 heartbeat = readl(&host->cfgtable->HeartBeat); 1241 if (copy_to_user 1242 (argp, &heartbeat, sizeof(Heartbeat_type))) 1243 return -EFAULT; 1244 return 0; 1245 } 1246 case CCISS_GETBUSTYPES: 1247 { 1248 BusTypes_type BusTypes; 1249 1250 if (!arg) 1251 return -EINVAL; 1252 BusTypes = readl(&host->cfgtable->BusTypes); 1253 if (copy_to_user 1254 (argp, &BusTypes, sizeof(BusTypes_type))) 1255 return -EFAULT; 1256 return 0; 1257 } 1258 case CCISS_GETFIRMVER: 1259 { 1260 FirmwareVer_type firmware; 1261 1262 if (!arg) 1263 return -EINVAL; 1264 memcpy(firmware, host->firm_ver, 4); 1265 1266 if (copy_to_user 1267 (argp, firmware, sizeof(FirmwareVer_type))) 1268 return -EFAULT; 1269 return 0; 1270 } 1271 case CCISS_GETDRIVVER: 1272 { 1273 DriverVer_type DriverVer = DRIVER_VERSION; 1274 1275 if (!arg) 1276 return -EINVAL; 1277 1278 if (copy_to_user 1279 (argp, &DriverVer, sizeof(DriverVer_type))) 1280 return -EFAULT; 1281 return 0; 1282 } 1283 1284 case CCISS_DEREGDISK: 1285 case CCISS_REGNEWD: 1286 case CCISS_REVALIDVOLS: 1287 return rebuild_lun_table(host, 0, 1); 1288 1289 case CCISS_GETLUNINFO:{ 1290 LogvolInfo_struct luninfo; 1291 1292 memcpy(&luninfo.LunID, drv->LunID, 1293 sizeof(luninfo.LunID)); 1294 luninfo.num_opens = drv->usage_count; 1295 luninfo.num_parts = 0; 1296 if (copy_to_user(argp, &luninfo, 1297 sizeof(LogvolInfo_struct))) 1298 return -EFAULT; 1299 return 0; 1300 } 1301 case CCISS_PASSTHRU: 1302 { 1303 IOCTL_Command_struct iocommand; 1304 CommandList_struct *c; 1305 char *buff = NULL; 1306 u64bit temp64; 1307 unsigned long flags; 1308 DECLARE_COMPLETION_ONSTACK(wait); 1309 1310 if (!arg) 1311 return -EINVAL; 1312 1313 if (!capable(CAP_SYS_RAWIO)) 1314 return -EPERM; 1315 1316 if (copy_from_user 1317 (&iocommand, argp, sizeof(IOCTL_Command_struct))) 1318 return -EFAULT; 1319 if ((iocommand.buf_size < 1) && 1320 (iocommand.Request.Type.Direction != XFER_NONE)) { 1321 return -EINVAL; 1322 } 1323#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */ 1324 /* Check kmalloc limits */ 1325 if (iocommand.buf_size > 128000) 1326 return -EINVAL; 1327#endif 1328 if (iocommand.buf_size > 0) { 1329 buff = kmalloc(iocommand.buf_size, GFP_KERNEL); 1330 if (buff == NULL) 1331 return -EFAULT; 1332 } 1333 if (iocommand.Request.Type.Direction == XFER_WRITE) { 1334 /* Copy the data into the buffer we created */ 1335 if (copy_from_user 1336 (buff, iocommand.buf, iocommand.buf_size)) { 1337 kfree(buff); 1338 return -EFAULT; 1339 } 1340 } else { 1341 memset(buff, 0, iocommand.buf_size); 1342 } 1343 if ((c = cmd_alloc(host, 0)) == NULL) { 1344 kfree(buff); 1345 return -ENOMEM; 1346 } 1347 // Fill in the command type 1348 c->cmd_type = CMD_IOCTL_PEND; 1349 // Fill in Command Header 1350 c->Header.ReplyQueue = 0; // unused in simple mode 1351 if (iocommand.buf_size > 0) // buffer to fill 1352 { 1353 c->Header.SGList = 1; 1354 c->Header.SGTotal = 1; 1355 } else // no buffers to fill 1356 { 1357 c->Header.SGList = 0; 1358 c->Header.SGTotal = 0; 1359 } 1360 c->Header.LUN = iocommand.LUN_info; 1361 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag 1362 1363 // Fill in Request block 1364 c->Request = iocommand.Request; 1365 1366 // Fill in the scatter gather information 1367 if (iocommand.buf_size > 0) { 1368 temp64.val = pci_map_single(host->pdev, buff, 1369 iocommand.buf_size, 1370 PCI_DMA_BIDIRECTIONAL); 1371 c->SG[0].Addr.lower = temp64.val32.lower; 1372 c->SG[0].Addr.upper = temp64.val32.upper; 1373 c->SG[0].Len = iocommand.buf_size; 1374 c->SG[0].Ext = 0; // we are not chaining 1375 } 1376 c->waiting = &wait; 1377 1378 /* Put the request on the tail of the request queue */ 1379 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1380 addQ(&host->reqQ, c); 1381 host->Qdepth++; 1382 start_io(host); 1383 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1384 1385 wait_for_completion(&wait); 1386 1387 /* unlock the buffers from DMA */ 1388 temp64.val32.lower = c->SG[0].Addr.lower; 1389 temp64.val32.upper = c->SG[0].Addr.upper; 1390 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val, 1391 iocommand.buf_size, 1392 PCI_DMA_BIDIRECTIONAL); 1393 1394 check_ioctl_unit_attention(host, c); 1395 1396 /* Copy the error information out */ 1397 iocommand.error_info = *(c->err_info); 1398 if (copy_to_user 1399 (argp, &iocommand, sizeof(IOCTL_Command_struct))) { 1400 kfree(buff); 1401 cmd_free(host, c, 0); 1402 return -EFAULT; 1403 } 1404 1405 if (iocommand.Request.Type.Direction == XFER_READ) { 1406 /* Copy the data out of the buffer we created */ 1407 if (copy_to_user 1408 (iocommand.buf, buff, iocommand.buf_size)) { 1409 kfree(buff); 1410 cmd_free(host, c, 0); 1411 return -EFAULT; 1412 } 1413 } 1414 kfree(buff); 1415 cmd_free(host, c, 0); 1416 return 0; 1417 } 1418 case CCISS_BIG_PASSTHRU:{ 1419 BIG_IOCTL_Command_struct *ioc; 1420 CommandList_struct *c; 1421 unsigned char **buff = NULL; 1422 int *buff_size = NULL; 1423 u64bit temp64; 1424 unsigned long flags; 1425 BYTE sg_used = 0; 1426 int status = 0; 1427 int i; 1428 DECLARE_COMPLETION_ONSTACK(wait); 1429 __u32 left; 1430 __u32 sz; 1431 BYTE __user *data_ptr; 1432 1433 if (!arg) 1434 return -EINVAL; 1435 if (!capable(CAP_SYS_RAWIO)) 1436 return -EPERM; 1437 ioc = (BIG_IOCTL_Command_struct *) 1438 kmalloc(sizeof(*ioc), GFP_KERNEL); 1439 if (!ioc) { 1440 status = -ENOMEM; 1441 goto cleanup1; 1442 } 1443 if (copy_from_user(ioc, argp, sizeof(*ioc))) { 1444 status = -EFAULT; 1445 goto cleanup1; 1446 } 1447 if ((ioc->buf_size < 1) && 1448 (ioc->Request.Type.Direction != XFER_NONE)) { 1449 status = -EINVAL; 1450 goto cleanup1; 1451 } 1452 /* Check kmalloc limits using all SGs */ 1453 if (ioc->malloc_size > MAX_KMALLOC_SIZE) { 1454 status = -EINVAL; 1455 goto cleanup1; 1456 } 1457 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { 1458 status = -EINVAL; 1459 goto cleanup1; 1460 } 1461 buff = 1462 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); 1463 if (!buff) { 1464 status = -ENOMEM; 1465 goto cleanup1; 1466 } 1467 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), 1468 GFP_KERNEL); 1469 if (!buff_size) { 1470 status = -ENOMEM; 1471 goto cleanup1; 1472 } 1473 left = ioc->buf_size; 1474 data_ptr = ioc->buf; 1475 while (left) { 1476 sz = (left > 1477 ioc->malloc_size) ? ioc-> 1478 malloc_size : left; 1479 buff_size[sg_used] = sz; 1480 buff[sg_used] = kmalloc(sz, GFP_KERNEL); 1481 if (buff[sg_used] == NULL) { 1482 status = -ENOMEM; 1483 goto cleanup1; 1484 } 1485 if (ioc->Request.Type.Direction == XFER_WRITE) { 1486 if (copy_from_user 1487 (buff[sg_used], data_ptr, sz)) { 1488 status = -EFAULT; 1489 goto cleanup1; 1490 } 1491 } else { 1492 memset(buff[sg_used], 0, sz); 1493 } 1494 left -= sz; 1495 data_ptr += sz; 1496 sg_used++; 1497 } 1498 if ((c = cmd_alloc(host, 0)) == NULL) { 1499 status = -ENOMEM; 1500 goto cleanup1; 1501 } 1502 c->cmd_type = CMD_IOCTL_PEND; 1503 c->Header.ReplyQueue = 0; 1504 1505 if (ioc->buf_size > 0) { 1506 c->Header.SGList = sg_used; 1507 c->Header.SGTotal = sg_used; 1508 } else { 1509 c->Header.SGList = 0; 1510 c->Header.SGTotal = 0; 1511 } 1512 c->Header.LUN = ioc->LUN_info; 1513 c->Header.Tag.lower = c->busaddr; 1514 1515 c->Request = ioc->Request; 1516 if (ioc->buf_size > 0) { 1517 int i; 1518 for (i = 0; i < sg_used; i++) { 1519 temp64.val = 1520 pci_map_single(host->pdev, buff[i], 1521 buff_size[i], 1522 PCI_DMA_BIDIRECTIONAL); 1523 c->SG[i].Addr.lower = 1524 temp64.val32.lower; 1525 c->SG[i].Addr.upper = 1526 temp64.val32.upper; 1527 c->SG[i].Len = buff_size[i]; 1528 c->SG[i].Ext = 0; /* we are not chaining */ 1529 } 1530 } 1531 c->waiting = &wait; 1532 /* Put the request on the tail of the request queue */ 1533 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1534 addQ(&host->reqQ, c); 1535 host->Qdepth++; 1536 start_io(host); 1537 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1538 wait_for_completion(&wait); 1539 /* unlock the buffers from DMA */ 1540 for (i = 0; i < sg_used; i++) { 1541 temp64.val32.lower = c->SG[i].Addr.lower; 1542 temp64.val32.upper = c->SG[i].Addr.upper; 1543 pci_unmap_single(host->pdev, 1544 (dma_addr_t) temp64.val, buff_size[i], 1545 PCI_DMA_BIDIRECTIONAL); 1546 } 1547 check_ioctl_unit_attention(host, c); 1548 /* Copy the error information out */ 1549 ioc->error_info = *(c->err_info); 1550 if (copy_to_user(argp, ioc, sizeof(*ioc))) { 1551 cmd_free(host, c, 0); 1552 status = -EFAULT; 1553 goto cleanup1; 1554 } 1555 if (ioc->Request.Type.Direction == XFER_READ) { 1556 /* Copy the data out of the buffer we created */ 1557 BYTE __user *ptr = ioc->buf; 1558 for (i = 0; i < sg_used; i++) { 1559 if (copy_to_user 1560 (ptr, buff[i], buff_size[i])) { 1561 cmd_free(host, c, 0); 1562 status = -EFAULT; 1563 goto cleanup1; 1564 } 1565 ptr += buff_size[i]; 1566 } 1567 } 1568 cmd_free(host, c, 0); 1569 status = 0; 1570 cleanup1: 1571 if (buff) { 1572 for (i = 0; i < sg_used; i++) 1573 kfree(buff[i]); 1574 kfree(buff); 1575 } 1576 kfree(buff_size); 1577 kfree(ioc); 1578 return status; 1579 } 1580 1581 /* scsi_cmd_ioctl handles these, below, though some are not */ 1582 /* very meaningful for cciss. SG_IO is the main one people want. */ 1583 1584 case SG_GET_VERSION_NUM: 1585 case SG_SET_TIMEOUT: 1586 case SG_GET_TIMEOUT: 1587 case SG_GET_RESERVED_SIZE: 1588 case SG_SET_RESERVED_SIZE: 1589 case SG_EMULATED_HOST: 1590 case SG_IO: 1591 case SCSI_IOCTL_SEND_COMMAND: 1592 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); 1593 1594 /* scsi_cmd_ioctl would normally handle these, below, but */ 1595 /* they aren't a good fit for cciss, as CD-ROMs are */ 1596 /* not supported, and we don't have any bus/target/lun */ 1597 /* which we present to the kernel. */ 1598 1599 case CDROM_SEND_PACKET: 1600 case CDROMCLOSETRAY: 1601 case CDROMEJECT: 1602 case SCSI_IOCTL_GET_IDLUN: 1603 case SCSI_IOCTL_GET_BUS_NUMBER: 1604 default: 1605 return -ENOTTY; 1606 } 1607} 1608 1609static void cciss_check_queues(ctlr_info_t *h) 1610{ 1611 int start_queue = h->next_to_run; 1612 int i; 1613 1614 /* check to see if we have maxed out the number of commands that can 1615 * be placed on the queue. If so then exit. We do this check here 1616 * in case the interrupt we serviced was from an ioctl and did not 1617 * free any new commands. 1618 */ 1619 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) 1620 return; 1621 1622 /* We have room on the queue for more commands. Now we need to queue 1623 * them up. We will also keep track of the next queue to run so 1624 * that every queue gets a chance to be started first. 1625 */ 1626 for (i = 0; i < h->highest_lun + 1; i++) { 1627 int curr_queue = (start_queue + i) % (h->highest_lun + 1); 1628 /* make sure the disk has been added and the drive is real 1629 * because this can be called from the middle of init_one. 1630 */ 1631 if (!h->drv[curr_queue]) 1632 continue; 1633 if (!(h->drv[curr_queue]->queue) || 1634 !(h->drv[curr_queue]->heads)) 1635 continue; 1636 blk_start_queue(h->gendisk[curr_queue]->queue); 1637 1638 /* check to see if we have maxed out the number of commands 1639 * that can be placed on the queue. 1640 */ 1641 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) { 1642 if (curr_queue == start_queue) { 1643 h->next_to_run = 1644 (start_queue + 1) % (h->highest_lun + 1); 1645 break; 1646 } else { 1647 h->next_to_run = curr_queue; 1648 break; 1649 } 1650 } 1651 } 1652} 1653 1654static void cciss_softirq_done(struct request *rq) 1655{ 1656 CommandList_struct *cmd = rq->completion_data; 1657 ctlr_info_t *h = hba[cmd->ctlr]; 1658 unsigned long flags; 1659 u64bit temp64; 1660 int i, ddir; 1661 1662 if (cmd->Request.Type.Direction == XFER_READ) 1663 ddir = PCI_DMA_FROMDEVICE; 1664 else 1665 ddir = PCI_DMA_TODEVICE; 1666 1667 /* command did not need to be retried */ 1668 /* unmap the DMA mapping for all the scatter gather elements */ 1669 for (i = 0; i < cmd->Header.SGList; i++) { 1670 temp64.val32.lower = cmd->SG[i].Addr.lower; 1671 temp64.val32.upper = cmd->SG[i].Addr.upper; 1672 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir); 1673 } 1674 1675#ifdef CCISS_DEBUG 1676 printk("Done with %p\n", rq); 1677#endif /* CCISS_DEBUG */ 1678 1679 /* set the residual count for pc requests */ 1680 if (blk_pc_request(rq)) 1681 rq->resid_len = cmd->err_info->ResidualCnt; 1682 1683 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO); 1684 1685 spin_lock_irqsave(&h->lock, flags); 1686 cmd_free(h, cmd, 1); 1687 cciss_check_queues(h); 1688 spin_unlock_irqrestore(&h->lock, flags); 1689} 1690 1691static inline void log_unit_to_scsi3addr(ctlr_info_t *h, 1692 unsigned char scsi3addr[], uint32_t log_unit) 1693{ 1694 memcpy(scsi3addr, h->drv[log_unit]->LunID, 1695 sizeof(h->drv[log_unit]->LunID)); 1696} 1697 1698/* This function gets the SCSI vendor, model, and revision of a logical drive 1699 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if 1700 * they cannot be read. 1701 */ 1702static void cciss_get_device_descr(int ctlr, int logvol, 1703 char *vendor, char *model, char *rev) 1704{ 1705 int rc; 1706 InquiryData_struct *inq_buf; 1707 unsigned char scsi3addr[8]; 1708 1709 *vendor = '\0'; 1710 *model = '\0'; 1711 *rev = '\0'; 1712 1713 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1714 if (!inq_buf) 1715 return; 1716 1717 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1718 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0, 1719 scsi3addr, TYPE_CMD); 1720 if (rc == IO_OK) { 1721 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN); 1722 vendor[VENDOR_LEN] = '\0'; 1723 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN); 1724 model[MODEL_LEN] = '\0'; 1725 memcpy(rev, &inq_buf->data_byte[32], REV_LEN); 1726 rev[REV_LEN] = '\0'; 1727 } 1728 1729 kfree(inq_buf); 1730 return; 1731} 1732 1733/* This function gets the serial number of a logical drive via 1734 * inquiry page 0x83. Serial no. is 16 bytes. If the serial 1735 * number cannot be had, for whatever reason, 16 bytes of 0xff 1736 * are returned instead. 1737 */ 1738static void cciss_get_serial_no(int ctlr, int logvol, 1739 unsigned char *serial_no, int buflen) 1740{ 1741#define PAGE_83_INQ_BYTES 64 1742 int rc; 1743 unsigned char *buf; 1744 unsigned char scsi3addr[8]; 1745 1746 if (buflen > 16) 1747 buflen = 16; 1748 memset(serial_no, 0xff, buflen); 1749 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); 1750 if (!buf) 1751 return; 1752 memset(serial_no, 0, buflen); 1753 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1754 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf, 1755 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); 1756 if (rc == IO_OK) 1757 memcpy(serial_no, &buf[8], buflen); 1758 kfree(buf); 1759 return; 1760} 1761 1762/* 1763 * cciss_add_disk sets up the block device queue for a logical drive 1764 */ 1765static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, 1766 int drv_index) 1767{ 1768 disk->queue = blk_init_queue(do_cciss_request, &h->lock); 1769 if (!disk->queue) 1770 goto init_queue_failure; 1771 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index); 1772 disk->major = h->major; 1773 disk->first_minor = drv_index << NWD_SHIFT; 1774 disk->fops = &cciss_fops; 1775 if (cciss_create_ld_sysfs_entry(h, drv_index)) 1776 goto cleanup_queue; 1777 disk->private_data = h->drv[drv_index]; 1778 disk->driverfs_dev = &h->drv[drv_index]->dev; 1779 1780 /* Set up queue information */ 1781 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); 1782 1783 /* This is a hardware imposed limit. */ 1784 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES); 1785 1786 /* This is a limit in the driver and could be eliminated. */ 1787 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES); 1788 1789 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors); 1790 1791 blk_queue_softirq_done(disk->queue, cciss_softirq_done); 1792 1793 disk->queue->queuedata = h; 1794 1795 blk_queue_logical_block_size(disk->queue, 1796 h->drv[drv_index]->block_size); 1797 1798 /* Make sure all queue data is written out before */ 1799 /* setting h->drv[drv_index]->queue, as setting this */ 1800 /* allows the interrupt handler to start the queue */ 1801 wmb(); 1802 h->drv[drv_index]->queue = disk->queue; 1803 add_disk(disk); 1804 return 0; 1805 1806cleanup_queue: 1807 blk_cleanup_queue(disk->queue); 1808 disk->queue = NULL; 1809init_queue_failure: 1810 return -1; 1811} 1812 1813/* This function will check the usage_count of the drive to be updated/added. 1814 * If the usage_count is zero and it is a heretofore unknown drive, or, 1815 * the drive's capacity, geometry, or serial number has changed, 1816 * then the drive information will be updated and the disk will be 1817 * re-registered with the kernel. If these conditions don't hold, 1818 * then it will be left alone for the next reboot. The exception to this 1819 * is disk 0 which will always be left registered with the kernel since it 1820 * is also the controller node. Any changes to disk 0 will show up on 1821 * the next reboot. 1822 */ 1823static void cciss_update_drive_info(int ctlr, int drv_index, int first_time, 1824 int via_ioctl) 1825{ 1826 ctlr_info_t *h = hba[ctlr]; 1827 struct gendisk *disk; 1828 InquiryData_struct *inq_buff = NULL; 1829 unsigned int block_size; 1830 sector_t total_size; 1831 unsigned long flags = 0; 1832 int ret = 0; 1833 drive_info_struct *drvinfo; 1834 1835 /* Get information about the disk and modify the driver structure */ 1836 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1837 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL); 1838 if (inq_buff == NULL || drvinfo == NULL) 1839 goto mem_msg; 1840 1841 /* testing to see if 16-byte CDBs are already being used */ 1842 if (h->cciss_read == CCISS_READ_16) { 1843 cciss_read_capacity_16(h->ctlr, drv_index, 1844 &total_size, &block_size); 1845 1846 } else { 1847 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size); 1848 /* if read_capacity returns all F's this volume is >2TB */ 1849 /* in size so we switch to 16-byte CDB's for all */ 1850 /* read/write ops */ 1851 if (total_size == 0xFFFFFFFFULL) { 1852 cciss_read_capacity_16(ctlr, drv_index, 1853 &total_size, &block_size); 1854 h->cciss_read = CCISS_READ_16; 1855 h->cciss_write = CCISS_WRITE_16; 1856 } else { 1857 h->cciss_read = CCISS_READ_10; 1858 h->cciss_write = CCISS_WRITE_10; 1859 } 1860 } 1861 1862 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size, 1863 inq_buff, drvinfo); 1864 drvinfo->block_size = block_size; 1865 drvinfo->nr_blocks = total_size + 1; 1866 1867 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor, 1868 drvinfo->model, drvinfo->rev); 1869 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no, 1870 sizeof(drvinfo->serial_no)); 1871 /* Save the lunid in case we deregister the disk, below. */ 1872 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID, 1873 sizeof(drvinfo->LunID)); 1874 1875 /* Is it the same disk we already know, and nothing's changed? */ 1876 if (h->drv[drv_index]->raid_level != -1 && 1877 ((memcmp(drvinfo->serial_no, 1878 h->drv[drv_index]->serial_no, 16) == 0) && 1879 drvinfo->block_size == h->drv[drv_index]->block_size && 1880 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks && 1881 drvinfo->heads == h->drv[drv_index]->heads && 1882 drvinfo->sectors == h->drv[drv_index]->sectors && 1883 drvinfo->cylinders == h->drv[drv_index]->cylinders)) 1884 /* The disk is unchanged, nothing to update */ 1885 goto freeret; 1886 1887 /* If we get here it's not the same disk, or something's changed, 1888 * so we need to * deregister it, and re-register it, if it's not 1889 * in use. 1890 * If the disk already exists then deregister it before proceeding 1891 * (unless it's the first disk (for the controller node). 1892 */ 1893 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) { 1894 printk(KERN_WARNING "disk %d has changed.\n", drv_index); 1895 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 1896 h->drv[drv_index]->busy_configuring = 1; 1897 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 1898 1899 /* deregister_disk sets h->drv[drv_index]->queue = NULL 1900 * which keeps the interrupt handler from starting 1901 * the queue. 1902 */ 1903 ret = deregister_disk(h, drv_index, 0, via_ioctl); 1904 } 1905 1906 /* If the disk is in use return */ 1907 if (ret) 1908 goto freeret; 1909 1910 /* Save the new information from cciss_geometry_inquiry 1911 * and serial number inquiry. If the disk was deregistered 1912 * above, then h->drv[drv_index] will be NULL. 1913 */ 1914 if (h->drv[drv_index] == NULL) { 1915 drvinfo->device_initialized = 0; 1916 h->drv[drv_index] = drvinfo; 1917 drvinfo = NULL; /* so it won't be freed below. */ 1918 } else { 1919 /* special case for cxd0 */ 1920 h->drv[drv_index]->block_size = drvinfo->block_size; 1921 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks; 1922 h->drv[drv_index]->heads = drvinfo->heads; 1923 h->drv[drv_index]->sectors = drvinfo->sectors; 1924 h->drv[drv_index]->cylinders = drvinfo->cylinders; 1925 h->drv[drv_index]->raid_level = drvinfo->raid_level; 1926 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16); 1927 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor, 1928 VENDOR_LEN + 1); 1929 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1); 1930 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1); 1931 } 1932 1933 ++h->num_luns; 1934 disk = h->gendisk[drv_index]; 1935 set_capacity(disk, h->drv[drv_index]->nr_blocks); 1936 1937 /* If it's not disk 0 (drv_index != 0) 1938 * or if it was disk 0, but there was previously 1939 * no actual corresponding configured logical drive 1940 * (raid_leve == -1) then we want to update the 1941 * logical drive's information. 1942 */ 1943 if (drv_index || first_time) { 1944 if (cciss_add_disk(h, disk, drv_index) != 0) { 1945 cciss_free_gendisk(h, drv_index); 1946 cciss_free_drive_info(h, drv_index); 1947 printk(KERN_WARNING "cciss:%d could not update " 1948 "disk %d\n", h->ctlr, drv_index); 1949 --h->num_luns; 1950 } 1951 } 1952 1953freeret: 1954 kfree(inq_buff); 1955 kfree(drvinfo); 1956 return; 1957mem_msg: 1958 printk(KERN_ERR "cciss: out of memory\n"); 1959 goto freeret; 1960} 1961 1962/* This function will find the first index of the controllers drive array 1963 * that has a null drv pointer and allocate the drive info struct and 1964 * will return that index This is where new drives will be added. 1965 * If the index to be returned is greater than the highest_lun index for 1966 * the controller then highest_lun is set * to this new index. 1967 * If there are no available indexes or if tha allocation fails, then -1 1968 * is returned. * "controller_node" is used to know if this is a real 1969 * logical drive, or just the controller node, which determines if this 1970 * counts towards highest_lun. 1971 */ 1972static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node) 1973{ 1974 int i; 1975 drive_info_struct *drv; 1976 1977 /* Search for an empty slot for our drive info */ 1978 for (i = 0; i < CISS_MAX_LUN; i++) { 1979 1980 /* if not cxd0 case, and it's occupied, skip it. */ 1981 if (h->drv[i] && i != 0) 1982 continue; 1983 /* 1984 * If it's cxd0 case, and drv is alloc'ed already, and a 1985 * disk is configured there, skip it. 1986 */ 1987 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1) 1988 continue; 1989 1990 /* 1991 * We've found an empty slot. Update highest_lun 1992 * provided this isn't just the fake cxd0 controller node. 1993 */ 1994 if (i > h->highest_lun && !controller_node) 1995 h->highest_lun = i; 1996 1997 /* If adding a real disk at cxd0, and it's already alloc'ed */ 1998 if (i == 0 && h->drv[i] != NULL) 1999 return i; 2000 2001 /* 2002 * Found an empty slot, not already alloc'ed. Allocate it. 2003 * Mark it with raid_level == -1, so we know it's new later on. 2004 */ 2005 drv = kzalloc(sizeof(*drv), GFP_KERNEL); 2006 if (!drv) 2007 return -1; 2008 drv->raid_level = -1; /* so we know it's new */ 2009 h->drv[i] = drv; 2010 return i; 2011 } 2012 return -1; 2013} 2014 2015static void cciss_free_drive_info(ctlr_info_t *h, int drv_index) 2016{ 2017 kfree(h->drv[drv_index]); 2018 h->drv[drv_index] = NULL; 2019} 2020 2021static void cciss_free_gendisk(ctlr_info_t *h, int drv_index) 2022{ 2023 put_disk(h->gendisk[drv_index]); 2024 h->gendisk[drv_index] = NULL; 2025} 2026 2027/* cciss_add_gendisk finds a free hba[]->drv structure 2028 * and allocates a gendisk if needed, and sets the lunid 2029 * in the drvinfo structure. It returns the index into 2030 * the ->drv[] array, or -1 if none are free. 2031 * is_controller_node indicates whether highest_lun should 2032 * count this disk, or if it's only being added to provide 2033 * a means to talk to the controller in case no logical 2034 * drives have yet been configured. 2035 */ 2036static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[], 2037 int controller_node) 2038{ 2039 int drv_index; 2040 2041 drv_index = cciss_alloc_drive_info(h, controller_node); 2042 if (drv_index == -1) 2043 return -1; 2044 2045 /*Check if the gendisk needs to be allocated */ 2046 if (!h->gendisk[drv_index]) { 2047 h->gendisk[drv_index] = 2048 alloc_disk(1 << NWD_SHIFT); 2049 if (!h->gendisk[drv_index]) { 2050 printk(KERN_ERR "cciss%d: could not " 2051 "allocate a new disk %d\n", 2052 h->ctlr, drv_index); 2053 goto err_free_drive_info; 2054 } 2055 } 2056 memcpy(h->drv[drv_index]->LunID, lunid, 2057 sizeof(h->drv[drv_index]->LunID)); 2058 if (cciss_create_ld_sysfs_entry(h, drv_index)) 2059 goto err_free_disk; 2060 /* Don't need to mark this busy because nobody */ 2061 /* else knows about this disk yet to contend */ 2062 /* for access to it. */ 2063 h->drv[drv_index]->busy_configuring = 0; 2064 wmb(); 2065 return drv_index; 2066 2067err_free_disk: 2068 cciss_free_gendisk(h, drv_index); 2069err_free_drive_info: 2070 cciss_free_drive_info(h, drv_index); 2071 return -1; 2072} 2073 2074/* This is for the special case of a controller which 2075 * has no logical drives. In this case, we still need 2076 * to register a disk so the controller can be accessed 2077 * by the Array Config Utility. 2078 */ 2079static void cciss_add_controller_node(ctlr_info_t *h) 2080{ 2081 struct gendisk *disk; 2082 int drv_index; 2083 2084 if (h->gendisk[0] != NULL) /* already did this? Then bail. */ 2085 return; 2086 2087 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1); 2088 if (drv_index == -1) 2089 goto error; 2090 h->drv[drv_index]->block_size = 512; 2091 h->drv[drv_index]->nr_blocks = 0; 2092 h->drv[drv_index]->heads = 0; 2093 h->drv[drv_index]->sectors = 0; 2094 h->drv[drv_index]->cylinders = 0; 2095 h->drv[drv_index]->raid_level = -1; 2096 memset(h->drv[drv_index]->serial_no, 0, 16); 2097 disk = h->gendisk[drv_index]; 2098 if (cciss_add_disk(h, disk, drv_index) == 0) 2099 return; 2100 cciss_free_gendisk(h, drv_index); 2101 cciss_free_drive_info(h, drv_index); 2102error: 2103 printk(KERN_WARNING "cciss%d: could not " 2104 "add disk 0.\n", h->ctlr); 2105 return; 2106} 2107 2108/* This function will add and remove logical drives from the Logical 2109 * drive array of the controller and maintain persistency of ordering 2110 * so that mount points are preserved until the next reboot. This allows 2111 * for the removal of logical drives in the middle of the drive array 2112 * without a re-ordering of those drives. 2113 * INPUT 2114 * h = The controller to perform the operations on 2115 */ 2116static int rebuild_lun_table(ctlr_info_t *h, int first_time, 2117 int via_ioctl) 2118{ 2119 int ctlr = h->ctlr; 2120 int num_luns; 2121 ReportLunData_struct *ld_buff = NULL; 2122 int return_code; 2123 int listlength = 0; 2124 int i; 2125 int drv_found; 2126 int drv_index = 0; 2127 unsigned char lunid[8] = CTLR_LUNID; 2128 unsigned long flags; 2129 2130 if (!capable(CAP_SYS_RAWIO)) 2131 return -EPERM; 2132 2133 /* Set busy_configuring flag for this operation */ 2134 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2135 if (h->busy_configuring) { 2136 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2137 return -EBUSY; 2138 } 2139 h->busy_configuring = 1; 2140 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2141 2142 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); 2143 if (ld_buff == NULL) 2144 goto mem_msg; 2145 2146 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff, 2147 sizeof(ReportLunData_struct), 2148 0, CTLR_LUNID, TYPE_CMD); 2149 2150 if (return_code == IO_OK) 2151 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); 2152 else { /* reading number of logical volumes failed */ 2153 printk(KERN_WARNING "cciss: report logical volume" 2154 " command failed\n"); 2155 listlength = 0; 2156 goto freeret; 2157 } 2158 2159 num_luns = listlength / 8; /* 8 bytes per entry */ 2160 if (num_luns > CISS_MAX_LUN) { 2161 num_luns = CISS_MAX_LUN; 2162 printk(KERN_WARNING "cciss: more luns configured" 2163 " on controller than can be handled by" 2164 " this driver.\n"); 2165 } 2166 2167 if (num_luns == 0) 2168 cciss_add_controller_node(h); 2169 2170 /* Compare controller drive array to driver's drive array 2171 * to see if any drives are missing on the controller due 2172 * to action of Array Config Utility (user deletes drive) 2173 * and deregister logical drives which have disappeared. 2174 */ 2175 for (i = 0; i <= h->highest_lun; i++) { 2176 int j; 2177 drv_found = 0; 2178 2179 /* skip holes in the array from already deleted drives */ 2180 if (h->drv[i] == NULL) 2181 continue; 2182 2183 for (j = 0; j < num_luns; j++) { 2184 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid)); 2185 if (memcmp(h->drv[i]->LunID, lunid, 2186 sizeof(lunid)) == 0) { 2187 drv_found = 1; 2188 break; 2189 } 2190 } 2191 if (!drv_found) { 2192 /* Deregister it from the OS, it's gone. */ 2193 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2194 h->drv[i]->busy_configuring = 1; 2195 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2196 return_code = deregister_disk(h, i, 1, via_ioctl); 2197 if (h->drv[i] != NULL) 2198 h->drv[i]->busy_configuring = 0; 2199 } 2200 } 2201 2202 /* Compare controller drive array to driver's drive array. 2203 * Check for updates in the drive information and any new drives 2204 * on the controller due to ACU adding logical drives, or changing 2205 * a logical drive's size, etc. Reregister any new/changed drives 2206 */ 2207 for (i = 0; i < num_luns; i++) { 2208 int j; 2209 2210 drv_found = 0; 2211 2212 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid)); 2213 /* Find if the LUN is already in the drive array 2214 * of the driver. If so then update its info 2215 * if not in use. If it does not exist then find 2216 * the first free index and add it. 2217 */ 2218 for (j = 0; j <= h->highest_lun; j++) { 2219 if (h->drv[j] != NULL && 2220 memcmp(h->drv[j]->LunID, lunid, 2221 sizeof(h->drv[j]->LunID)) == 0) { 2222 drv_index = j; 2223 drv_found = 1; 2224 break; 2225 } 2226 } 2227 2228 /* check if the drive was found already in the array */ 2229 if (!drv_found) { 2230 drv_index = cciss_add_gendisk(h, lunid, 0); 2231 if (drv_index == -1) 2232 goto freeret; 2233 } 2234 cciss_update_drive_info(ctlr, drv_index, first_time, 2235 via_ioctl); 2236 } /* end for */ 2237 2238freeret: 2239 kfree(ld_buff); 2240 h->busy_configuring = 0; 2241 /* We return -1 here to tell the ACU that we have registered/updated 2242 * all of the drives that we can and to keep it from calling us 2243 * additional times. 2244 */ 2245 return -1; 2246mem_msg: 2247 printk(KERN_ERR "cciss: out of memory\n"); 2248 h->busy_configuring = 0; 2249 goto freeret; 2250} 2251 2252static void cciss_clear_drive_info(drive_info_struct *drive_info) 2253{ 2254 /* zero out the disk size info */ 2255 drive_info->nr_blocks = 0; 2256 drive_info->block_size = 0; 2257 drive_info->heads = 0; 2258 drive_info->sectors = 0; 2259 drive_info->cylinders = 0; 2260 drive_info->raid_level = -1; 2261 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no)); 2262 memset(drive_info->model, 0, sizeof(drive_info->model)); 2263 memset(drive_info->rev, 0, sizeof(drive_info->rev)); 2264 memset(drive_info->vendor, 0, sizeof(drive_info->vendor)); 2265 /* 2266 * don't clear the LUNID though, we need to remember which 2267 * one this one is. 2268 */ 2269} 2270 2271/* This function will deregister the disk and it's queue from the 2272 * kernel. It must be called with the controller lock held and the 2273 * drv structures busy_configuring flag set. It's parameters are: 2274 * 2275 * disk = This is the disk to be deregistered 2276 * drv = This is the drive_info_struct associated with the disk to be 2277 * deregistered. It contains information about the disk used 2278 * by the driver. 2279 * clear_all = This flag determines whether or not the disk information 2280 * is going to be completely cleared out and the highest_lun 2281 * reset. Sometimes we want to clear out information about 2282 * the disk in preparation for re-adding it. In this case 2283 * the highest_lun should be left unchanged and the LunID 2284 * should not be cleared. 2285 * via_ioctl 2286 * This indicates whether we've reached this path via ioctl. 2287 * This affects the maximum usage count allowed for c0d0 to be messed with. 2288 * If this path is reached via ioctl(), then the max_usage_count will 2289 * be 1, as the process calling ioctl() has got to have the device open. 2290 * If we get here via sysfs, then the max usage count will be zero. 2291*/ 2292static int deregister_disk(ctlr_info_t *h, int drv_index, 2293 int clear_all, int via_ioctl) 2294{ 2295 int i; 2296 struct gendisk *disk; 2297 drive_info_struct *drv; 2298 int recalculate_highest_lun; 2299 2300 if (!capable(CAP_SYS_RAWIO)) 2301 return -EPERM; 2302 2303 drv = h->drv[drv_index]; 2304 disk = h->gendisk[drv_index]; 2305 2306 /* make sure logical volume is NOT is use */ 2307 if (clear_all || (h->gendisk[0] == disk)) { 2308 if (drv->usage_count > via_ioctl) 2309 return -EBUSY; 2310 } else if (drv->usage_count > 0) 2311 return -EBUSY; 2312 2313 recalculate_highest_lun = (drv == h->drv[h->highest_lun]); 2314 2315 /* invalidate the devices and deregister the disk. If it is disk 2316 * zero do not deregister it but just zero out it's values. This 2317 * allows us to delete disk zero but keep the controller registered. 2318 */ 2319 if (h->gendisk[0] != disk) { 2320 struct request_queue *q = disk->queue; 2321 if (disk->flags & GENHD_FL_UP) { 2322 cciss_destroy_ld_sysfs_entry(h, drv_index, 0); 2323 del_gendisk(disk); 2324 } 2325 if (q) 2326 blk_cleanup_queue(q); 2327 /* If clear_all is set then we are deleting the logical 2328 * drive, not just refreshing its info. For drives 2329 * other than disk 0 we will call put_disk. We do not 2330 * do this for disk 0 as we need it to be able to 2331 * configure the controller. 2332 */ 2333 if (clear_all){ 2334 /* This isn't pretty, but we need to find the 2335 * disk in our array and NULL our the pointer. 2336 * This is so that we will call alloc_disk if 2337 * this index is used again later. 2338 */ 2339 for (i=0; i < CISS_MAX_LUN; i++){ 2340 if (h->gendisk[i] == disk) { 2341 h->gendisk[i] = NULL; 2342 break; 2343 } 2344 } 2345 put_disk(disk); 2346 } 2347 } else { 2348 set_capacity(disk, 0); 2349 cciss_clear_drive_info(drv); 2350 } 2351 2352 --h->num_luns; 2353 2354 /* if it was the last disk, find the new hightest lun */ 2355 if (clear_all && recalculate_highest_lun) { 2356 int i, newhighest = -1; 2357 for (i = 0; i <= h->highest_lun; i++) { 2358 /* if the disk has size > 0, it is available */ 2359 if (h->drv[i] && h->drv[i]->heads) 2360 newhighest = i; 2361 } 2362 h->highest_lun = newhighest; 2363 } 2364 return 0; 2365} 2366 2367static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, 2368 size_t size, __u8 page_code, unsigned char *scsi3addr, 2369 int cmd_type) 2370{ 2371 ctlr_info_t *h = hba[ctlr]; 2372 u64bit buff_dma_handle; 2373 int status = IO_OK; 2374 2375 c->cmd_type = CMD_IOCTL_PEND; 2376 c->Header.ReplyQueue = 0; 2377 if (buff != NULL) { 2378 c->Header.SGList = 1; 2379 c->Header.SGTotal = 1; 2380 } else { 2381 c->Header.SGList = 0; 2382 c->Header.SGTotal = 0; 2383 } 2384 c->Header.Tag.lower = c->busaddr; 2385 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); 2386 2387 c->Request.Type.Type = cmd_type; 2388 if (cmd_type == TYPE_CMD) { 2389 switch (cmd) { 2390 case CISS_INQUIRY: 2391 /* are we trying to read a vital product page */ 2392 if (page_code != 0) { 2393 c->Request.CDB[1] = 0x01; 2394 c->Request.CDB[2] = page_code; 2395 } 2396 c->Request.CDBLen = 6; 2397 c->Request.Type.Attribute = ATTR_SIMPLE; 2398 c->Request.Type.Direction = XFER_READ; 2399 c->Request.Timeout = 0; 2400 c->Request.CDB[0] = CISS_INQUIRY; 2401 c->Request.CDB[4] = size & 0xFF; 2402 break; 2403 case CISS_REPORT_LOG: 2404 case CISS_REPORT_PHYS: 2405 /* Talking to controller so It's a physical command 2406 mode = 00 target = 0. Nothing to write. 2407 */ 2408 c->Request.CDBLen = 12; 2409 c->Request.Type.Attribute = ATTR_SIMPLE; 2410 c->Request.Type.Direction = XFER_READ; 2411 c->Request.Timeout = 0; 2412 c->Request.CDB[0] = cmd; 2413 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB 2414 c->Request.CDB[7] = (size >> 16) & 0xFF; 2415 c->Request.CDB[8] = (size >> 8) & 0xFF; 2416 c->Request.CDB[9] = size & 0xFF; 2417 break; 2418 2419 case CCISS_READ_CAPACITY: 2420 c->Request.CDBLen = 10; 2421 c->Request.Type.Attribute = ATTR_SIMPLE; 2422 c->Request.Type.Direction = XFER_READ; 2423 c->Request.Timeout = 0; 2424 c->Request.CDB[0] = cmd; 2425 break; 2426 case CCISS_READ_CAPACITY_16: 2427 c->Request.CDBLen = 16; 2428 c->Request.Type.Attribute = ATTR_SIMPLE; 2429 c->Request.Type.Direction = XFER_READ; 2430 c->Request.Timeout = 0; 2431 c->Request.CDB[0] = cmd; 2432 c->Request.CDB[1] = 0x10; 2433 c->Request.CDB[10] = (size >> 24) & 0xFF; 2434 c->Request.CDB[11] = (size >> 16) & 0xFF; 2435 c->Request.CDB[12] = (size >> 8) & 0xFF; 2436 c->Request.CDB[13] = size & 0xFF; 2437 c->Request.Timeout = 0; 2438 c->Request.CDB[0] = cmd; 2439 break; 2440 case CCISS_CACHE_FLUSH: 2441 c->Request.CDBLen = 12; 2442 c->Request.Type.Attribute = ATTR_SIMPLE; 2443 c->Request.Type.Direction = XFER_WRITE; 2444 c->Request.Timeout = 0; 2445 c->Request.CDB[0] = BMIC_WRITE; 2446 c->Request.CDB[6] = BMIC_CACHE_FLUSH; 2447 break; 2448 case TEST_UNIT_READY: 2449 c->Request.CDBLen = 6; 2450 c->Request.Type.Attribute = ATTR_SIMPLE; 2451 c->Request.Type.Direction = XFER_NONE; 2452 c->Request.Timeout = 0; 2453 break; 2454 default: 2455 printk(KERN_WARNING 2456 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd); 2457 return IO_ERROR; 2458 } 2459 } else if (cmd_type == TYPE_MSG) { 2460 switch (cmd) { 2461 case 0: /* ABORT message */ 2462 c->Request.CDBLen = 12; 2463 c->Request.Type.Attribute = ATTR_SIMPLE; 2464 c->Request.Type.Direction = XFER_WRITE; 2465 c->Request.Timeout = 0; 2466 c->Request.CDB[0] = cmd; /* abort */ 2467 c->Request.CDB[1] = 0; /* abort a command */ 2468 /* buff contains the tag of the command to abort */ 2469 memcpy(&c->Request.CDB[4], buff, 8); 2470 break; 2471 case 1: /* RESET message */ 2472 c->Request.CDBLen = 16; 2473 c->Request.Type.Attribute = ATTR_SIMPLE; 2474 c->Request.Type.Direction = XFER_NONE; 2475 c->Request.Timeout = 0; 2476 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); 2477 c->Request.CDB[0] = cmd; /* reset */ 2478 c->Request.CDB[1] = 0x03; /* reset a target */ 2479 break; 2480 case 3: /* No-Op message */ 2481 c->Request.CDBLen = 1; 2482 c->Request.Type.Attribute = ATTR_SIMPLE; 2483 c->Request.Type.Direction = XFER_WRITE; 2484 c->Request.Timeout = 0; 2485 c->Request.CDB[0] = cmd; 2486 break; 2487 default: 2488 printk(KERN_WARNING 2489 "cciss%d: unknown message type %d\n", ctlr, cmd); 2490 return IO_ERROR; 2491 } 2492 } else { 2493 printk(KERN_WARNING 2494 "cciss%d: unknown command type %d\n", ctlr, cmd_type); 2495 return IO_ERROR; 2496 } 2497 /* Fill in the scatter gather information */ 2498 if (size > 0) { 2499 buff_dma_handle.val = (__u64) pci_map_single(h->pdev, 2500 buff, size, 2501 PCI_DMA_BIDIRECTIONAL); 2502 c->SG[0].Addr.lower = buff_dma_handle.val32.lower; 2503 c->SG[0].Addr.upper = buff_dma_handle.val32.upper; 2504 c->SG[0].Len = size; 2505 c->SG[0].Ext = 0; /* we are not chaining */ 2506 } 2507 return status; 2508} 2509 2510static int check_target_status(ctlr_info_t *h, CommandList_struct *c) 2511{ 2512 switch (c->err_info->ScsiStatus) { 2513 case SAM_STAT_GOOD: 2514 return IO_OK; 2515 case SAM_STAT_CHECK_CONDITION: 2516 switch (0xf & c->err_info->SenseInfo[2]) { 2517 case 0: return IO_OK; /* no sense */ 2518 case 1: return IO_OK; /* recovered error */ 2519 default: 2520 if (check_for_unit_attention(h, c)) 2521 return IO_NEEDS_RETRY; 2522 printk(KERN_WARNING "cciss%d: cmd 0x%02x " 2523 "check condition, sense key = 0x%02x\n", 2524 h->ctlr, c->Request.CDB[0], 2525 c->err_info->SenseInfo[2]); 2526 } 2527 break; 2528 default: 2529 printk(KERN_WARNING "cciss%d: cmd 0x%02x" 2530 "scsi status = 0x%02x\n", h->ctlr, 2531 c->Request.CDB[0], c->err_info->ScsiStatus); 2532 break; 2533 } 2534 return IO_ERROR; 2535} 2536 2537static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c) 2538{ 2539 int return_status = IO_OK; 2540 2541 if (c->err_info->CommandStatus == CMD_SUCCESS) 2542 return IO_OK; 2543 2544 switch (c->err_info->CommandStatus) { 2545 case CMD_TARGET_STATUS: 2546 return_status = check_target_status(h, c); 2547 break; 2548 case CMD_DATA_UNDERRUN: 2549 case CMD_DATA_OVERRUN: 2550 /* expected for inquiry and report lun commands */ 2551 break; 2552 case CMD_INVALID: 2553 printk(KERN_WARNING "cciss: cmd 0x%02x is " 2554 "reported invalid\n", c->Request.CDB[0]); 2555 return_status = IO_ERROR; 2556 break; 2557 case CMD_PROTOCOL_ERR: 2558 printk(KERN_WARNING "cciss: cmd 0x%02x has " 2559 "protocol error \n", c->Request.CDB[0]); 2560 return_status = IO_ERROR; 2561 break; 2562 case CMD_HARDWARE_ERR: 2563 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2564 " hardware error\n", c->Request.CDB[0]); 2565 return_status = IO_ERROR; 2566 break; 2567 case CMD_CONNECTION_LOST: 2568 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2569 "connection lost\n", c->Request.CDB[0]); 2570 return_status = IO_ERROR; 2571 break; 2572 case CMD_ABORTED: 2573 printk(KERN_WARNING "cciss: cmd 0x%02x was " 2574 "aborted\n", c->Request.CDB[0]); 2575 return_status = IO_ERROR; 2576 break; 2577 case CMD_ABORT_FAILED: 2578 printk(KERN_WARNING "cciss: cmd 0x%02x reports " 2579 "abort failed\n", c->Request.CDB[0]); 2580 return_status = IO_ERROR; 2581 break; 2582 case CMD_UNSOLICITED_ABORT: 2583 printk(KERN_WARNING 2584 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr, 2585 c->Request.CDB[0]); 2586 return_status = IO_NEEDS_RETRY; 2587 break; 2588 default: 2589 printk(KERN_WARNING "cciss: cmd 0x%02x returned " 2590 "unknown status %x\n", c->Request.CDB[0], 2591 c->err_info->CommandStatus); 2592 return_status = IO_ERROR; 2593 } 2594 return return_status; 2595} 2596 2597static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 2598 int attempt_retry) 2599{ 2600 DECLARE_COMPLETION_ONSTACK(wait); 2601 u64bit buff_dma_handle; 2602 unsigned long flags; 2603 int return_status = IO_OK; 2604 2605resend_cmd2: 2606 c->waiting = &wait; 2607 /* Put the request on the tail of the queue and send it */ 2608 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2609 addQ(&h->reqQ, c); 2610 h->Qdepth++; 2611 start_io(h); 2612 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2613 2614 wait_for_completion(&wait); 2615 2616 if (c->err_info->CommandStatus == 0 || !attempt_retry) 2617 goto command_done; 2618 2619 return_status = process_sendcmd_error(h, c); 2620 2621 if (return_status == IO_NEEDS_RETRY && 2622 c->retry_count < MAX_CMD_RETRIES) { 2623 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr, 2624 c->Request.CDB[0]); 2625 c->retry_count++; 2626 /* erase the old error information */ 2627 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 2628 return_status = IO_OK; 2629 INIT_COMPLETION(wait); 2630 goto resend_cmd2; 2631 } 2632 2633command_done: 2634 /* unlock the buffers from DMA */ 2635 buff_dma_handle.val32.lower = c->SG[0].Addr.lower; 2636 buff_dma_handle.val32.upper = c->SG[0].Addr.upper; 2637 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, 2638 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); 2639 return return_status; 2640} 2641 2642static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 2643 __u8 page_code, unsigned char scsi3addr[], 2644 int cmd_type) 2645{ 2646 ctlr_info_t *h = hba[ctlr]; 2647 CommandList_struct *c; 2648 int return_status; 2649 2650 c = cmd_alloc(h, 0); 2651 if (!c) 2652 return -ENOMEM; 2653 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code, 2654 scsi3addr, cmd_type); 2655 if (return_status == IO_OK) 2656 return_status = sendcmd_withirq_core(h, c, 1); 2657 2658 cmd_free(h, c, 0); 2659 return return_status; 2660} 2661 2662static void cciss_geometry_inquiry(int ctlr, int logvol, 2663 sector_t total_size, 2664 unsigned int block_size, 2665 InquiryData_struct *inq_buff, 2666 drive_info_struct *drv) 2667{ 2668 int return_code; 2669 unsigned long t; 2670 unsigned char scsi3addr[8]; 2671 2672 memset(inq_buff, 0, sizeof(InquiryData_struct)); 2673 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2674 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff, 2675 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD); 2676 if (return_code == IO_OK) { 2677 if (inq_buff->data_byte[8] == 0xFF) { 2678 printk(KERN_WARNING 2679 "cciss: reading geometry failed, volume " 2680 "does not support reading geometry\n"); 2681 drv->heads = 255; 2682 drv->sectors = 32; // Sectors per track 2683 drv->cylinders = total_size + 1; 2684 drv->raid_level = RAID_UNKNOWN; 2685 } else { 2686 drv->heads = inq_buff->data_byte[6]; 2687 drv->sectors = inq_buff->data_byte[7]; 2688 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8; 2689 drv->cylinders += inq_buff->data_byte[5]; 2690 drv->raid_level = inq_buff->data_byte[8]; 2691 } 2692 drv->block_size = block_size; 2693 drv->nr_blocks = total_size + 1; 2694 t = drv->heads * drv->sectors; 2695 if (t > 1) { 2696 sector_t real_size = total_size + 1; 2697 unsigned long rem = sector_div(real_size, t); 2698 if (rem) 2699 real_size++; 2700 drv->cylinders = real_size; 2701 } 2702 } else { /* Get geometry failed */ 2703 printk(KERN_WARNING "cciss: reading geometry failed\n"); 2704 } 2705} 2706 2707static void 2708cciss_read_capacity(int ctlr, int logvol, sector_t *total_size, 2709 unsigned int *block_size) 2710{ 2711 ReadCapdata_struct *buf; 2712 int return_code; 2713 unsigned char scsi3addr[8]; 2714 2715 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL); 2716 if (!buf) { 2717 printk(KERN_WARNING "cciss: out of memory\n"); 2718 return; 2719 } 2720 2721 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2722 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf, 2723 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD); 2724 if (return_code == IO_OK) { 2725 *total_size = be32_to_cpu(*(__be32 *) buf->total_size); 2726 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2727 } else { /* read capacity command failed */ 2728 printk(KERN_WARNING "cciss: read capacity failed\n"); 2729 *total_size = 0; 2730 *block_size = BLOCK_SIZE; 2731 } 2732 kfree(buf); 2733} 2734 2735static void cciss_read_capacity_16(int ctlr, int logvol, 2736 sector_t *total_size, unsigned int *block_size) 2737{ 2738 ReadCapdata_struct_16 *buf; 2739 int return_code; 2740 unsigned char scsi3addr[8]; 2741 2742 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL); 2743 if (!buf) { 2744 printk(KERN_WARNING "cciss: out of memory\n"); 2745 return; 2746 } 2747 2748 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2749 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16, 2750 ctlr, buf, sizeof(ReadCapdata_struct_16), 2751 0, scsi3addr, TYPE_CMD); 2752 if (return_code == IO_OK) { 2753 *total_size = be64_to_cpu(*(__be64 *) buf->total_size); 2754 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2755 } else { /* read capacity command failed */ 2756 printk(KERN_WARNING "cciss: read capacity failed\n"); 2757 *total_size = 0; 2758 *block_size = BLOCK_SIZE; 2759 } 2760 printk(KERN_INFO " blocks= %llu block_size= %d\n", 2761 (unsigned long long)*total_size+1, *block_size); 2762 kfree(buf); 2763} 2764 2765static int cciss_revalidate(struct gendisk *disk) 2766{ 2767 ctlr_info_t *h = get_host(disk); 2768 drive_info_struct *drv = get_drv(disk); 2769 int logvol; 2770 int FOUND = 0; 2771 unsigned int block_size; 2772 sector_t total_size; 2773 InquiryData_struct *inq_buff = NULL; 2774 2775 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { 2776 if (memcmp(h->drv[logvol]->LunID, drv->LunID, 2777 sizeof(drv->LunID)) == 0) { 2778 FOUND = 1; 2779 break; 2780 } 2781 } 2782 2783 if (!FOUND) 2784 return 1; 2785 2786 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 2787 if (inq_buff == NULL) { 2788 printk(KERN_WARNING "cciss: out of memory\n"); 2789 return 1; 2790 } 2791 if (h->cciss_read == CCISS_READ_10) { 2792 cciss_read_capacity(h->ctlr, logvol, 2793 &total_size, &block_size); 2794 } else { 2795 cciss_read_capacity_16(h->ctlr, logvol, 2796 &total_size, &block_size); 2797 } 2798 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size, 2799 inq_buff, drv); 2800 2801 blk_queue_logical_block_size(drv->queue, drv->block_size); 2802 set_capacity(disk, drv->nr_blocks); 2803 2804 kfree(inq_buff); 2805 return 0; 2806} 2807 2808/* 2809 * Map (physical) PCI mem into (virtual) kernel space 2810 */ 2811static void __iomem *remap_pci_mem(ulong base, ulong size) 2812{ 2813 ulong page_base = ((ulong) base) & PAGE_MASK; 2814 ulong page_offs = ((ulong) base) - page_base; 2815 void __iomem *page_remapped = ioremap(page_base, page_offs + size); 2816 2817 return page_remapped ? (page_remapped + page_offs) : NULL; 2818} 2819 2820/* 2821 * Takes jobs of the Q and sends them to the hardware, then puts it on 2822 * the Q to wait for completion. 2823 */ 2824static void start_io(ctlr_info_t *h) 2825{ 2826 CommandList_struct *c; 2827 2828 while (!hlist_empty(&h->reqQ)) { 2829 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 2830 /* can't do anything if fifo is full */ 2831 if ((h->access.fifo_full(h))) { 2832 printk(KERN_WARNING "cciss: fifo full\n"); 2833 break; 2834 } 2835 2836 /* Get the first entry from the Request Q */ 2837 removeQ(c); 2838 h->Qdepth--; 2839 2840 /* Tell the controller execute command */ 2841 h->access.submit_command(h, c); 2842 2843 /* Put job onto the completed Q */ 2844 addQ(&h->cmpQ, c); 2845 } 2846} 2847 2848/* Assumes that CCISS_LOCK(h->ctlr) is held. */ 2849/* Zeros out the error record and then resends the command back */ 2850/* to the controller */ 2851static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c) 2852{ 2853 /* erase the old error information */ 2854 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 2855 2856 /* add it to software queue and then send it to the controller */ 2857 addQ(&h->reqQ, c); 2858 h->Qdepth++; 2859 if (h->Qdepth > h->maxQsinceinit) 2860 h->maxQsinceinit = h->Qdepth; 2861 2862 start_io(h); 2863} 2864 2865static inline unsigned int make_status_bytes(unsigned int scsi_status_byte, 2866 unsigned int msg_byte, unsigned int host_byte, 2867 unsigned int driver_byte) 2868{ 2869 /* inverse of macros in scsi.h */ 2870 return (scsi_status_byte & 0xff) | 2871 ((msg_byte & 0xff) << 8) | 2872 ((host_byte & 0xff) << 16) | 2873 ((driver_byte & 0xff) << 24); 2874} 2875 2876static inline int evaluate_target_status(ctlr_info_t *h, 2877 CommandList_struct *cmd, int *retry_cmd) 2878{ 2879 unsigned char sense_key; 2880 unsigned char status_byte, msg_byte, host_byte, driver_byte; 2881 int error_value; 2882 2883 *retry_cmd = 0; 2884 /* If we get in here, it means we got "target status", that is, scsi status */ 2885 status_byte = cmd->err_info->ScsiStatus; 2886 driver_byte = DRIVER_OK; 2887 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */ 2888 2889 if (blk_pc_request(cmd->rq)) 2890 host_byte = DID_PASSTHROUGH; 2891 else 2892 host_byte = DID_OK; 2893 2894 error_value = make_status_bytes(status_byte, msg_byte, 2895 host_byte, driver_byte); 2896 2897 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) { 2898 if (!blk_pc_request(cmd->rq)) 2899 printk(KERN_WARNING "cciss: cmd %p " 2900 "has SCSI Status 0x%x\n", 2901 cmd, cmd->err_info->ScsiStatus); 2902 return error_value; 2903 } 2904 2905 /* check the sense key */ 2906 sense_key = 0xf & cmd->err_info->SenseInfo[2]; 2907 /* no status or recovered error */ 2908 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq)) 2909 error_value = 0; 2910 2911 if (check_for_unit_attention(h, cmd)) { 2912 *retry_cmd = !blk_pc_request(cmd->rq); 2913 return 0; 2914 } 2915 2916 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */ 2917 if (error_value != 0) 2918 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION" 2919 " sense key = 0x%x\n", cmd, sense_key); 2920 return error_value; 2921 } 2922 2923 /* SG_IO or similar, copy sense data back */ 2924 if (cmd->rq->sense) { 2925 if (cmd->rq->sense_len > cmd->err_info->SenseLen) 2926 cmd->rq->sense_len = cmd->err_info->SenseLen; 2927 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo, 2928 cmd->rq->sense_len); 2929 } else 2930 cmd->rq->sense_len = 0; 2931 2932 return error_value; 2933} 2934 2935/* checks the status of the job and calls complete buffers to mark all 2936 * buffers for the completed job. Note that this function does not need 2937 * to hold the hba/queue lock. 2938 */ 2939static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd, 2940 int timeout) 2941{ 2942 int retry_cmd = 0; 2943 struct request *rq = cmd->rq; 2944 2945 rq->errors = 0; 2946 2947 if (timeout) 2948 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT); 2949 2950 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */ 2951 goto after_error_processing; 2952 2953 switch (cmd->err_info->CommandStatus) { 2954 case CMD_TARGET_STATUS: 2955 rq->errors = evaluate_target_status(h, cmd, &retry_cmd); 2956 break; 2957 case CMD_DATA_UNDERRUN: 2958 if (blk_fs_request(cmd->rq)) { 2959 printk(KERN_WARNING "cciss: cmd %p has" 2960 " completed with data underrun " 2961 "reported\n", cmd); 2962 cmd->rq->resid_len = cmd->err_info->ResidualCnt; 2963 } 2964 break; 2965 case CMD_DATA_OVERRUN: 2966 if (blk_fs_request(cmd->rq)) 2967 printk(KERN_WARNING "cciss: cmd %p has" 2968 " completed with data overrun " 2969 "reported\n", cmd); 2970 break; 2971 case CMD_INVALID: 2972 printk(KERN_WARNING "cciss: cmd %p is " 2973 "reported invalid\n", cmd); 2974 rq->errors = make_status_bytes(SAM_STAT_GOOD, 2975 cmd->err_info->CommandStatus, DRIVER_OK, 2976 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 2977 break; 2978 case CMD_PROTOCOL_ERR: 2979 printk(KERN_WARNING "cciss: cmd %p has " 2980 "protocol error \n", cmd); 2981 rq->errors = make_status_bytes(SAM_STAT_GOOD, 2982 cmd->err_info->CommandStatus, DRIVER_OK, 2983 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 2984 break; 2985 case CMD_HARDWARE_ERR: 2986 printk(KERN_WARNING "cciss: cmd %p had " 2987 " hardware error\n", cmd); 2988 rq->errors = make_status_bytes(SAM_STAT_GOOD, 2989 cmd->err_info->CommandStatus, DRIVER_OK, 2990 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 2991 break; 2992 case CMD_CONNECTION_LOST: 2993 printk(KERN_WARNING "cciss: cmd %p had " 2994 "connection lost\n", cmd); 2995 rq->errors = make_status_bytes(SAM_STAT_GOOD, 2996 cmd->err_info->CommandStatus, DRIVER_OK, 2997 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 2998 break; 2999 case CMD_ABORTED: 3000 printk(KERN_WARNING "cciss: cmd %p was " 3001 "aborted\n", cmd); 3002 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3003 cmd->err_info->CommandStatus, DRIVER_OK, 3004 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); 3005 break; 3006 case CMD_ABORT_FAILED: 3007 printk(KERN_WARNING "cciss: cmd %p reports " 3008 "abort failed\n", cmd); 3009 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3010 cmd->err_info->CommandStatus, DRIVER_OK, 3011 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3012 break; 3013 case CMD_UNSOLICITED_ABORT: 3014 printk(KERN_WARNING "cciss%d: unsolicited " 3015 "abort %p\n", h->ctlr, cmd); 3016 if (cmd->retry_count < MAX_CMD_RETRIES) { 3017 retry_cmd = 1; 3018 printk(KERN_WARNING 3019 "cciss%d: retrying %p\n", h->ctlr, cmd); 3020 cmd->retry_count++; 3021 } else 3022 printk(KERN_WARNING 3023 "cciss%d: %p retried too " 3024 "many times\n", h->ctlr, cmd); 3025 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3026 cmd->err_info->CommandStatus, DRIVER_OK, 3027 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); 3028 break; 3029 case CMD_TIMEOUT: 3030 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd); 3031 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3032 cmd->err_info->CommandStatus, DRIVER_OK, 3033 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3034 break; 3035 default: 3036 printk(KERN_WARNING "cciss: cmd %p returned " 3037 "unknown status %x\n", cmd, 3038 cmd->err_info->CommandStatus); 3039 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3040 cmd->err_info->CommandStatus, DRIVER_OK, 3041 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3042 } 3043 3044after_error_processing: 3045 3046 /* We need to return this command */ 3047 if (retry_cmd) { 3048 resend_cciss_cmd(h, cmd); 3049 return; 3050 } 3051 cmd->rq->completion_data = cmd; 3052 blk_complete_request(cmd->rq); 3053} 3054 3055/* 3056 * Get a request and submit it to the controller. 3057 */ 3058static void do_cciss_request(struct request_queue *q) 3059{ 3060 ctlr_info_t *h = q->queuedata; 3061 CommandList_struct *c; 3062 sector_t start_blk; 3063 int seg; 3064 struct request *creq; 3065 u64bit temp64; 3066 struct scatterlist tmp_sg[MAXSGENTRIES]; 3067 drive_info_struct *drv; 3068 int i, dir; 3069 3070 /* We call start_io here in case there is a command waiting on the 3071 * queue that has not been sent. 3072 */ 3073 if (blk_queue_plugged(q)) 3074 goto startio; 3075 3076 queue: 3077 creq = blk_peek_request(q); 3078 if (!creq) 3079 goto startio; 3080 3081 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES); 3082 3083 if ((c = cmd_alloc(h, 1)) == NULL) 3084 goto full; 3085 3086 blk_start_request(creq); 3087 3088 spin_unlock_irq(q->queue_lock); 3089 3090 c->cmd_type = CMD_RWREQ; 3091 c->rq = creq; 3092 3093 /* fill in the request */ 3094 drv = creq->rq_disk->private_data; 3095 c->Header.ReplyQueue = 0; // unused in simple mode 3096 /* got command from pool, so use the command block index instead */ 3097 /* for direct lookups. */ 3098 /* The first 2 bits are reserved for controller error reporting. */ 3099 c->Header.Tag.lower = (c->cmdindex << 3); 3100 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */ 3101 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID)); 3102 c->Request.CDBLen = 10; // 12 byte commands not in FW yet; 3103 c->Request.Type.Type = TYPE_CMD; // It is a command. 3104 c->Request.Type.Attribute = ATTR_SIMPLE; 3105 c->Request.Type.Direction = 3106 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE; 3107 c->Request.Timeout = 0; // Don't time out 3108 c->Request.CDB[0] = 3109 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write; 3110 start_blk = blk_rq_pos(creq); 3111#ifdef CCISS_DEBUG 3112 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", 3113 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq)); 3114#endif /* CCISS_DEBUG */ 3115 3116 sg_init_table(tmp_sg, MAXSGENTRIES); 3117 seg = blk_rq_map_sg(q, creq, tmp_sg); 3118 3119 /* get the DMA records for the setup */ 3120 if (c->Request.Type.Direction == XFER_READ) 3121 dir = PCI_DMA_FROMDEVICE; 3122 else 3123 dir = PCI_DMA_TODEVICE; 3124 3125 for (i = 0; i < seg; i++) { 3126 c->SG[i].Len = tmp_sg[i].length; 3127 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]), 3128 tmp_sg[i].offset, 3129 tmp_sg[i].length, dir); 3130 c->SG[i].Addr.lower = temp64.val32.lower; 3131 c->SG[i].Addr.upper = temp64.val32.upper; 3132 c->SG[i].Ext = 0; // we are not chaining 3133 } 3134 /* track how many SG entries we are using */ 3135 if (seg > h->maxSG) 3136 h->maxSG = seg; 3137 3138#ifdef CCISS_DEBUG 3139 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n", 3140 blk_rq_sectors(creq), seg); 3141#endif /* CCISS_DEBUG */ 3142 3143 c->Header.SGList = c->Header.SGTotal = seg; 3144 if (likely(blk_fs_request(creq))) { 3145 if(h->cciss_read == CCISS_READ_10) { 3146 c->Request.CDB[1] = 0; 3147 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB 3148 c->Request.CDB[3] = (start_blk >> 16) & 0xff; 3149 c->Request.CDB[4] = (start_blk >> 8) & 0xff; 3150 c->Request.CDB[5] = start_blk & 0xff; 3151 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB 3152 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff; 3153 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff; 3154 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0; 3155 } else { 3156 u32 upper32 = upper_32_bits(start_blk); 3157 3158 c->Request.CDBLen = 16; 3159 c->Request.CDB[1]= 0; 3160 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB 3161 c->Request.CDB[3]= (upper32 >> 16) & 0xff; 3162 c->Request.CDB[4]= (upper32 >> 8) & 0xff; 3163 c->Request.CDB[5]= upper32 & 0xff; 3164 c->Request.CDB[6]= (start_blk >> 24) & 0xff; 3165 c->Request.CDB[7]= (start_blk >> 16) & 0xff; 3166 c->Request.CDB[8]= (start_blk >> 8) & 0xff; 3167 c->Request.CDB[9]= start_blk & 0xff; 3168 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff; 3169 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff; 3170 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff; 3171 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff; 3172 c->Request.CDB[14] = c->Request.CDB[15] = 0; 3173 } 3174 } else if (blk_pc_request(creq)) { 3175 c->Request.CDBLen = creq->cmd_len; 3176 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB); 3177 } else { 3178 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type); 3179 BUG(); 3180 } 3181 3182 spin_lock_irq(q->queue_lock); 3183 3184 addQ(&h->reqQ, c); 3185 h->Qdepth++; 3186 if (h->Qdepth > h->maxQsinceinit) 3187 h->maxQsinceinit = h->Qdepth; 3188 3189 goto queue; 3190full: 3191 blk_stop_queue(q); 3192startio: 3193 /* We will already have the driver lock here so not need 3194 * to lock it. 3195 */ 3196 start_io(h); 3197} 3198 3199static inline unsigned long get_next_completion(ctlr_info_t *h) 3200{ 3201 return h->access.command_completed(h); 3202} 3203 3204static inline int interrupt_pending(ctlr_info_t *h) 3205{ 3206 return h->access.intr_pending(h); 3207} 3208 3209static inline long interrupt_not_for_us(ctlr_info_t *h) 3210{ 3211 return (((h->access.intr_pending(h) == 0) || 3212 (h->interrupts_enabled == 0))); 3213} 3214 3215static irqreturn_t do_cciss_intr(int irq, void *dev_id) 3216{ 3217 ctlr_info_t *h = dev_id; 3218 CommandList_struct *c; 3219 unsigned long flags; 3220 __u32 a, a1, a2; 3221 3222 if (interrupt_not_for_us(h)) 3223 return IRQ_NONE; 3224 /* 3225 * If there are completed commands in the completion queue, 3226 * we had better do something about it. 3227 */ 3228 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 3229 while (interrupt_pending(h)) { 3230 while ((a = get_next_completion(h)) != FIFO_EMPTY) { 3231 a1 = a; 3232 if ((a & 0x04)) { 3233 a2 = (a >> 3); 3234 if (a2 >= h->nr_cmds) { 3235 printk(KERN_WARNING 3236 "cciss: controller cciss%d failed, stopping.\n", 3237 h->ctlr); 3238 fail_all_cmds(h->ctlr); 3239 return IRQ_HANDLED; 3240 } 3241 3242 c = h->cmd_pool + a2; 3243 a = c->busaddr; 3244 3245 } else { 3246 struct hlist_node *tmp; 3247 3248 a &= ~3; 3249 c = NULL; 3250 hlist_for_each_entry(c, tmp, &h->cmpQ, list) { 3251 if (c->busaddr == a) 3252 break; 3253 } 3254 } 3255 /* 3256 * If we've found the command, take it off the 3257 * completion Q and free it 3258 */ 3259 if (c && c->busaddr == a) { 3260 removeQ(c); 3261 if (c->cmd_type == CMD_RWREQ) { 3262 complete_command(h, c, 0); 3263 } else if (c->cmd_type == CMD_IOCTL_PEND) { 3264 complete(c->waiting); 3265 } 3266# ifdef CONFIG_CISS_SCSI_TAPE 3267 else if (c->cmd_type == CMD_SCSI) 3268 complete_scsi_command(c, 0, a1); 3269# endif 3270 continue; 3271 } 3272 } 3273 } 3274 3275 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 3276 return IRQ_HANDLED; 3277} 3278 3279/** 3280 * add_to_scan_list() - add controller to rescan queue 3281 * @h: Pointer to the controller. 3282 * 3283 * Adds the controller to the rescan queue if not already on the queue. 3284 * 3285 * returns 1 if added to the queue, 0 if skipped (could be on the 3286 * queue already, or the controller could be initializing or shutting 3287 * down). 3288 **/ 3289static int add_to_scan_list(struct ctlr_info *h) 3290{ 3291 struct ctlr_info *test_h; 3292 int found = 0; 3293 int ret = 0; 3294 3295 if (h->busy_initializing) 3296 return 0; 3297 3298 if (!mutex_trylock(&h->busy_shutting_down)) 3299 return 0; 3300 3301 mutex_lock(&scan_mutex); 3302 list_for_each_entry(test_h, &scan_q, scan_list) { 3303 if (test_h == h) { 3304 found = 1; 3305 break; 3306 } 3307 } 3308 if (!found && !h->busy_scanning) { 3309 INIT_COMPLETION(h->scan_wait); 3310 list_add_tail(&h->scan_list, &scan_q); 3311 ret = 1; 3312 } 3313 mutex_unlock(&scan_mutex); 3314 mutex_unlock(&h->busy_shutting_down); 3315 3316 return ret; 3317} 3318 3319/** 3320 * remove_from_scan_list() - remove controller from rescan queue 3321 * @h: Pointer to the controller. 3322 * 3323 * Removes the controller from the rescan queue if present. Blocks if 3324 * the controller is currently conducting a rescan. The controller 3325 * can be in one of three states: 3326 * 1. Doesn't need a scan 3327 * 2. On the scan list, but not scanning yet (we remove it) 3328 * 3. Busy scanning (and not on the list). In this case we want to wait for 3329 * the scan to complete to make sure the scanning thread for this 3330 * controller is completely idle. 3331 **/ 3332static void remove_from_scan_list(struct ctlr_info *h) 3333{ 3334 struct ctlr_info *test_h, *tmp_h; 3335 3336 mutex_lock(&scan_mutex); 3337 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) { 3338 if (test_h == h) { /* state 2. */ 3339 list_del(&h->scan_list); 3340 complete_all(&h->scan_wait); 3341 mutex_unlock(&scan_mutex); 3342 return; 3343 } 3344 } 3345 if (h->busy_scanning) { /* state 3. */ 3346 mutex_unlock(&scan_mutex); 3347 wait_for_completion(&h->scan_wait); 3348 } else { /* state 1, nothing to do. */ 3349 mutex_unlock(&scan_mutex); 3350 } 3351} 3352 3353/** 3354 * scan_thread() - kernel thread used to rescan controllers 3355 * @data: Ignored. 3356 * 3357 * A kernel thread used scan for drive topology changes on 3358 * controllers. The thread processes only one controller at a time 3359 * using a queue. Controllers are added to the queue using 3360 * add_to_scan_list() and removed from the queue either after done 3361 * processing or using remove_from_scan_list(). 3362 * 3363 * returns 0. 3364 **/ 3365static int scan_thread(void *data) 3366{ 3367 struct ctlr_info *h; 3368 3369 while (1) { 3370 set_current_state(TASK_INTERRUPTIBLE); 3371 schedule(); 3372 if (kthread_should_stop()) 3373 break; 3374 3375 while (1) { 3376 mutex_lock(&scan_mutex); 3377 if (list_empty(&scan_q)) { 3378 mutex_unlock(&scan_mutex); 3379 break; 3380 } 3381 3382 h = list_entry(scan_q.next, 3383 struct ctlr_info, 3384 scan_list); 3385 list_del(&h->scan_list); 3386 h->busy_scanning = 1; 3387 mutex_unlock(&scan_mutex); 3388 3389 rebuild_lun_table(h, 0, 0); 3390 complete_all(&h->scan_wait); 3391 mutex_lock(&scan_mutex); 3392 h->busy_scanning = 0; 3393 mutex_unlock(&scan_mutex); 3394 } 3395 } 3396 3397 return 0; 3398} 3399 3400static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c) 3401{ 3402 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) 3403 return 0; 3404 3405 switch (c->err_info->SenseInfo[12]) { 3406 case STATE_CHANGED: 3407 printk(KERN_WARNING "cciss%d: a state change " 3408 "detected, command retried\n", h->ctlr); 3409 return 1; 3410 break; 3411 case LUN_FAILED: 3412 printk(KERN_WARNING "cciss%d: LUN failure " 3413 "detected, action required\n", h->ctlr); 3414 return 1; 3415 break; 3416 case REPORT_LUNS_CHANGED: 3417 printk(KERN_WARNING "cciss%d: report LUN data " 3418 "changed\n", h->ctlr); 3419 /* 3420 * Here, we could call add_to_scan_list and wake up the scan thread, 3421 * except that it's quite likely that we will get more than one 3422 * REPORT_LUNS_CHANGED condition in quick succession, which means 3423 * that those which occur after the first one will likely happen 3424 * *during* the scan_thread's rescan. And the rescan code is not 3425 * robust enough to restart in the middle, undoing what it has already 3426 * done, and it's not clear that it's even possible to do this, since 3427 * part of what it does is notify the block layer, which starts 3428 * doing it's own i/o to read partition tables and so on, and the 3429 * driver doesn't have visibility to know what might need undoing. 3430 * In any event, if possible, it is horribly complicated to get right 3431 * so we just don't do it for now. 3432 * 3433 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012. 3434 */ 3435 return 1; 3436 break; 3437 case POWER_OR_RESET: 3438 printk(KERN_WARNING "cciss%d: a power on " 3439 "or device reset detected\n", h->ctlr); 3440 return 1; 3441 break; 3442 case UNIT_ATTENTION_CLEARED: 3443 printk(KERN_WARNING "cciss%d: unit attention " 3444 "cleared by another initiator\n", h->ctlr); 3445 return 1; 3446 break; 3447 default: 3448 printk(KERN_WARNING "cciss%d: unknown " 3449 "unit attention detected\n", h->ctlr); 3450 return 1; 3451 } 3452} 3453 3454/* 3455 * We cannot read the structure directly, for portability we must use 3456 * the io functions. 3457 * This is for debug only. 3458 */ 3459#ifdef CCISS_DEBUG 3460static void print_cfg_table(CfgTable_struct *tb) 3461{ 3462 int i; 3463 char temp_name[17]; 3464 3465 printk("Controller Configuration information\n"); 3466 printk("------------------------------------\n"); 3467 for (i = 0; i < 4; i++) 3468 temp_name[i] = readb(&(tb->Signature[i])); 3469 temp_name[4] = '\0'; 3470 printk(" Signature = %s\n", temp_name); 3471 printk(" Spec Number = %d\n", readl(&(tb->SpecValence))); 3472 printk(" Transport methods supported = 0x%x\n", 3473 readl(&(tb->TransportSupport))); 3474 printk(" Transport methods active = 0x%x\n", 3475 readl(&(tb->TransportActive))); 3476 printk(" Requested transport Method = 0x%x\n", 3477 readl(&(tb->HostWrite.TransportRequest))); 3478 printk(" Coalesce Interrupt Delay = 0x%x\n", 3479 readl(&(tb->HostWrite.CoalIntDelay))); 3480 printk(" Coalesce Interrupt Count = 0x%x\n", 3481 readl(&(tb->HostWrite.CoalIntCount))); 3482 printk(" Max outstanding commands = 0x%d\n", 3483 readl(&(tb->CmdsOutMax))); 3484 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes))); 3485 for (i = 0; i < 16; i++) 3486 temp_name[i] = readb(&(tb->ServerName[i])); 3487 temp_name[16] = '\0'; 3488 printk(" Server Name = %s\n", temp_name); 3489 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat))); 3490} 3491#endif /* CCISS_DEBUG */ 3492 3493static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) 3494{ 3495 int i, offset, mem_type, bar_type; 3496 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ 3497 return 0; 3498 offset = 0; 3499 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3500 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; 3501 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) 3502 offset += 4; 3503 else { 3504 mem_type = pci_resource_flags(pdev, i) & 3505 PCI_BASE_ADDRESS_MEM_TYPE_MASK; 3506 switch (mem_type) { 3507 case PCI_BASE_ADDRESS_MEM_TYPE_32: 3508 case PCI_BASE_ADDRESS_MEM_TYPE_1M: 3509 offset += 4; /* 32 bit */ 3510 break; 3511 case PCI_BASE_ADDRESS_MEM_TYPE_64: 3512 offset += 8; 3513 break; 3514 default: /* reserved in PCI 2.2 */ 3515 printk(KERN_WARNING 3516 "Base address is invalid\n"); 3517 return -1; 3518 break; 3519 } 3520 } 3521 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) 3522 return i + 1; 3523 } 3524 return -1; 3525} 3526 3527/* If MSI/MSI-X is supported by the kernel we will try to enable it on 3528 * controllers that are capable. If not, we use IO-APIC mode. 3529 */ 3530 3531static void __devinit cciss_interrupt_mode(ctlr_info_t *c, 3532 struct pci_dev *pdev, __u32 board_id) 3533{ 3534#ifdef CONFIG_PCI_MSI 3535 int err; 3536 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1}, 3537 {0, 2}, {0, 3} 3538 }; 3539 3540 /* Some boards advertise MSI but don't really support it */ 3541 if ((board_id == 0x40700E11) || 3542 (board_id == 0x40800E11) || 3543 (board_id == 0x40820E11) || (board_id == 0x40830E11)) 3544 goto default_int_mode; 3545 3546 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) { 3547 err = pci_enable_msix(pdev, cciss_msix_entries, 4); 3548 if (!err) { 3549 c->intr[0] = cciss_msix_entries[0].vector; 3550 c->intr[1] = cciss_msix_entries[1].vector; 3551 c->intr[2] = cciss_msix_entries[2].vector; 3552 c->intr[3] = cciss_msix_entries[3].vector; 3553 c->msix_vector = 1; 3554 return; 3555 } 3556 if (err > 0) { 3557 printk(KERN_WARNING "cciss: only %d MSI-X vectors " 3558 "available\n", err); 3559 goto default_int_mode; 3560 } else { 3561 printk(KERN_WARNING "cciss: MSI-X init failed %d\n", 3562 err); 3563 goto default_int_mode; 3564 } 3565 } 3566 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) { 3567 if (!pci_enable_msi(pdev)) { 3568 c->msi_vector = 1; 3569 } else { 3570 printk(KERN_WARNING "cciss: MSI init failed\n"); 3571 } 3572 } 3573default_int_mode: 3574#endif /* CONFIG_PCI_MSI */ 3575 /* if we get here we're going to use the default interrupt mode */ 3576 c->intr[SIMPLE_MODE_INT] = pdev->irq; 3577 return; 3578} 3579 3580static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev) 3581{ 3582 ushort subsystem_vendor_id, subsystem_device_id, command; 3583 __u32 board_id, scratchpad = 0; 3584 __u64 cfg_offset; 3585 __u32 cfg_base_addr; 3586 __u64 cfg_base_addr_index; 3587 int i, prod_index, err; 3588 3589 subsystem_vendor_id = pdev->subsystem_vendor; 3590 subsystem_device_id = pdev->subsystem_device; 3591 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) | 3592 subsystem_vendor_id); 3593 3594 for (i = 0; i < ARRAY_SIZE(products); i++) { 3595 /* Stand aside for hpsa driver on request */ 3596 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY) 3597 return -ENODEV; 3598 if (board_id == products[i].board_id) 3599 break; 3600 } 3601 prod_index = i; 3602 if (prod_index == ARRAY_SIZE(products)) { 3603 dev_warn(&pdev->dev, 3604 "unrecognized board ID: 0x%08lx, ignoring.\n", 3605 (unsigned long) board_id); 3606 return -ENODEV; 3607 } 3608 3609 /* check to see if controller has been disabled */ 3610 /* BEFORE trying to enable it */ 3611 (void)pci_read_config_word(pdev, PCI_COMMAND, &command); 3612 if (!(command & 0x02)) { 3613 printk(KERN_WARNING 3614 "cciss: controller appears to be disabled\n"); 3615 return -ENODEV; 3616 } 3617 3618 err = pci_enable_device(pdev); 3619 if (err) { 3620 printk(KERN_ERR "cciss: Unable to Enable PCI device\n"); 3621 return err; 3622 } 3623 3624 err = pci_request_regions(pdev, "cciss"); 3625 if (err) { 3626 printk(KERN_ERR "cciss: Cannot obtain PCI resources, " 3627 "aborting\n"); 3628 return err; 3629 } 3630 3631#ifdef CCISS_DEBUG 3632 printk("command = %x\n", command); 3633 printk("irq = %x\n", pdev->irq); 3634 printk("board_id = %x\n", board_id); 3635#endif /* CCISS_DEBUG */ 3636 3637/* If the kernel supports MSI/MSI-X we will try to enable that functionality, 3638 * else we use the IO-APIC interrupt assigned to us by system ROM. 3639 */ 3640 cciss_interrupt_mode(c, pdev, board_id); 3641 3642 /* find the memory BAR */ 3643 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3644 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) 3645 break; 3646 } 3647 if (i == DEVICE_COUNT_RESOURCE) { 3648 printk(KERN_WARNING "cciss: No memory BAR found\n"); 3649 err = -ENODEV; 3650 goto err_out_free_res; 3651 } 3652 3653 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits 3654 * already removed 3655 */ 3656 3657#ifdef CCISS_DEBUG 3658 printk("address 0 = %lx\n", c->paddr); 3659#endif /* CCISS_DEBUG */ 3660 c->vaddr = remap_pci_mem(c->paddr, 0x250); 3661 3662 /* Wait for the board to become ready. (PCI hotplug needs this.) 3663 * We poll for up to 120 secs, once per 100ms. */ 3664 for (i = 0; i < 1200; i++) { 3665 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET); 3666 if (scratchpad == CCISS_FIRMWARE_READY) 3667 break; 3668 set_current_state(TASK_INTERRUPTIBLE); 3669 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */ 3670 } 3671 if (scratchpad != CCISS_FIRMWARE_READY) { 3672 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n"); 3673 err = -ENODEV; 3674 goto err_out_free_res; 3675 } 3676 3677 /* get the address index number */ 3678 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET); 3679 cfg_base_addr &= (__u32) 0x0000ffff; 3680#ifdef CCISS_DEBUG 3681 printk("cfg base address = %x\n", cfg_base_addr); 3682#endif /* CCISS_DEBUG */ 3683 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr); 3684#ifdef CCISS_DEBUG 3685 printk("cfg base address index = %llx\n", 3686 (unsigned long long)cfg_base_addr_index); 3687#endif /* CCISS_DEBUG */ 3688 if (cfg_base_addr_index == -1) { 3689 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n"); 3690 err = -ENODEV; 3691 goto err_out_free_res; 3692 } 3693 3694 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET); 3695#ifdef CCISS_DEBUG 3696 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset); 3697#endif /* CCISS_DEBUG */ 3698 c->cfgtable = remap_pci_mem(pci_resource_start(pdev, 3699 cfg_base_addr_index) + 3700 cfg_offset, sizeof(CfgTable_struct)); 3701 c->board_id = board_id; 3702 3703#ifdef CCISS_DEBUG 3704 print_cfg_table(c->cfgtable); 3705#endif /* CCISS_DEBUG */ 3706 3707 /* Some controllers support Zero Memory Raid (ZMR). 3708 * When configured in ZMR mode the number of supported 3709 * commands drops to 64. So instead of just setting an 3710 * arbitrary value we make the driver a little smarter. 3711 * We read the config table to tell us how many commands 3712 * are supported on the controller then subtract 4 to 3713 * leave a little room for ioctl calls. 3714 */ 3715 c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); 3716 c->product_name = products[prod_index].product_name; 3717 c->access = *(products[prod_index].access); 3718 c->nr_cmds = c->max_commands - 4; 3719 if ((readb(&c->cfgtable->Signature[0]) != 'C') || 3720 (readb(&c->cfgtable->Signature[1]) != 'I') || 3721 (readb(&c->cfgtable->Signature[2]) != 'S') || 3722 (readb(&c->cfgtable->Signature[3]) != 'S')) { 3723 printk("Does not appear to be a valid CISS config table\n"); 3724 err = -ENODEV; 3725 goto err_out_free_res; 3726 } 3727#ifdef CONFIG_X86 3728 { 3729 /* Need to enable prefetch in the SCSI core for 6400 in x86 */ 3730 __u32 prefetch; 3731 prefetch = readl(&(c->cfgtable->SCSI_Prefetch)); 3732 prefetch |= 0x100; 3733 writel(prefetch, &(c->cfgtable->SCSI_Prefetch)); 3734 } 3735#endif 3736 3737 /* Disabling DMA prefetch and refetch for the P600. 3738 * An ASIC bug may result in accesses to invalid memory addresses. 3739 * We've disabled prefetch for some time now. Testing with XEN 3740 * kernels revealed a bug in the refetch if dom0 resides on a P600. 3741 */ 3742 if(board_id == 0x3225103C) { 3743 __u32 dma_prefetch; 3744 __u32 dma_refetch; 3745 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG); 3746 dma_prefetch |= 0x8000; 3747 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG); 3748 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch); 3749 dma_refetch |= 0x1; 3750 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch); 3751 } 3752 3753#ifdef CCISS_DEBUG 3754 printk("Trying to put board into Simple mode\n"); 3755#endif /* CCISS_DEBUG */ 3756 c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); 3757 /* Update the field, and then ring the doorbell */ 3758 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest)); 3759 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL); 3760 3761 /* under certain very rare conditions, this can take awhile. 3762 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right 3763 * as we enter this code.) */ 3764 for (i = 0; i < MAX_CONFIG_WAIT; i++) { 3765 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) 3766 break; 3767 /* delay and try again */ 3768 set_current_state(TASK_INTERRUPTIBLE); 3769 schedule_timeout(msecs_to_jiffies(1)); 3770 } 3771 3772#ifdef CCISS_DEBUG 3773 printk(KERN_DEBUG "I counter got to %d %x\n", i, 3774 readl(c->vaddr + SA5_DOORBELL)); 3775#endif /* CCISS_DEBUG */ 3776#ifdef CCISS_DEBUG 3777 print_cfg_table(c->cfgtable); 3778#endif /* CCISS_DEBUG */ 3779 3780 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) { 3781 printk(KERN_WARNING "cciss: unable to get board into" 3782 " simple mode\n"); 3783 err = -ENODEV; 3784 goto err_out_free_res; 3785 } 3786 return 0; 3787 3788err_out_free_res: 3789 /* 3790 * Deliberately omit pci_disable_device(): it does something nasty to 3791 * Smart Array controllers that pci_enable_device does not undo 3792 */ 3793 pci_release_regions(pdev); 3794 return err; 3795} 3796 3797/* Function to find the first free pointer into our hba[] array 3798 * Returns -1 if no free entries are left. 3799 */ 3800static int alloc_cciss_hba(void) 3801{ 3802 int i; 3803 3804 for (i = 0; i < MAX_CTLR; i++) { 3805 if (!hba[i]) { 3806 ctlr_info_t *p; 3807 3808 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); 3809 if (!p) 3810 goto Enomem; 3811 hba[i] = p; 3812 return i; 3813 } 3814 } 3815 printk(KERN_WARNING "cciss: This driver supports a maximum" 3816 " of %d controllers.\n", MAX_CTLR); 3817 return -1; 3818Enomem: 3819 printk(KERN_ERR "cciss: out of memory.\n"); 3820 return -1; 3821} 3822 3823static void free_hba(int n) 3824{ 3825 ctlr_info_t *h = hba[n]; 3826 int i; 3827 3828 hba[n] = NULL; 3829 for (i = 0; i < h->highest_lun + 1; i++) 3830 if (h->gendisk[i] != NULL) 3831 put_disk(h->gendisk[i]); 3832 kfree(h); 3833} 3834 3835/* Send a message CDB to the firmware. */ 3836static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) 3837{ 3838 typedef struct { 3839 CommandListHeader_struct CommandHeader; 3840 RequestBlock_struct Request; 3841 ErrDescriptor_struct ErrorDescriptor; 3842 } Command; 3843 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); 3844 Command *cmd; 3845 dma_addr_t paddr64; 3846 uint32_t paddr32, tag; 3847 void __iomem *vaddr; 3848 int i, err; 3849 3850 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 3851 if (vaddr == NULL) 3852 return -ENOMEM; 3853 3854 /* The Inbound Post Queue only accepts 32-bit physical addresses for the 3855 CCISS commands, so they must be allocated from the lower 4GiB of 3856 memory. */ 3857 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 3858 if (err) { 3859 iounmap(vaddr); 3860 return -ENOMEM; 3861 } 3862 3863 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); 3864 if (cmd == NULL) { 3865 iounmap(vaddr); 3866 return -ENOMEM; 3867 } 3868 3869 /* This must fit, because of the 32-bit consistent DMA mask. Also, 3870 although there's no guarantee, we assume that the address is at 3871 least 4-byte aligned (most likely, it's page-aligned). */ 3872 paddr32 = paddr64; 3873 3874 cmd->CommandHeader.ReplyQueue = 0; 3875 cmd->CommandHeader.SGList = 0; 3876 cmd->CommandHeader.SGTotal = 0; 3877 cmd->CommandHeader.Tag.lower = paddr32; 3878 cmd->CommandHeader.Tag.upper = 0; 3879 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); 3880 3881 cmd->Request.CDBLen = 16; 3882 cmd->Request.Type.Type = TYPE_MSG; 3883 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; 3884 cmd->Request.Type.Direction = XFER_NONE; 3885 cmd->Request.Timeout = 0; /* Don't time out */ 3886 cmd->Request.CDB[0] = opcode; 3887 cmd->Request.CDB[1] = type; 3888 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ 3889 3890 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); 3891 cmd->ErrorDescriptor.Addr.upper = 0; 3892 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); 3893 3894 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); 3895 3896 for (i = 0; i < 10; i++) { 3897 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); 3898 if ((tag & ~3) == paddr32) 3899 break; 3900 schedule_timeout_uninterruptible(HZ); 3901 } 3902 3903 iounmap(vaddr); 3904 3905 /* we leak the DMA buffer here ... no choice since the controller could 3906 still complete the command. */ 3907 if (i == 10) { 3908 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n", 3909 opcode, type); 3910 return -ETIMEDOUT; 3911 } 3912 3913 pci_free_consistent(pdev, cmd_sz, cmd, paddr64); 3914 3915 if (tag & 2) { 3916 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n", 3917 opcode, type); 3918 return -EIO; 3919 } 3920 3921 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n", 3922 opcode, type); 3923 return 0; 3924} 3925 3926#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0) 3927#define cciss_noop(p) cciss_message(p, 3, 0) 3928 3929static __devinit int cciss_reset_msi(struct pci_dev *pdev) 3930{ 3931/* the #defines are stolen from drivers/pci/msi.h. */ 3932#define msi_control_reg(base) (base + PCI_MSI_FLAGS) 3933#define PCI_MSIX_FLAGS_ENABLE (1 << 15) 3934 3935 int pos; 3936 u16 control = 0; 3937 3938 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); 3939 if (pos) { 3940 pci_read_config_word(pdev, msi_control_reg(pos), &control); 3941 if (control & PCI_MSI_FLAGS_ENABLE) { 3942 printk(KERN_INFO "cciss: resetting MSI\n"); 3943 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE); 3944 } 3945 } 3946 3947 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); 3948 if (pos) { 3949 pci_read_config_word(pdev, msi_control_reg(pos), &control); 3950 if (control & PCI_MSIX_FLAGS_ENABLE) { 3951 printk(KERN_INFO "cciss: resetting MSI-X\n"); 3952 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE); 3953 } 3954 } 3955 3956 return 0; 3957} 3958 3959/* This does a hard reset of the controller using PCI power management 3960 * states. */ 3961static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev) 3962{ 3963 u16 pmcsr, saved_config_space[32]; 3964 int i, pos; 3965 3966 printk(KERN_INFO "cciss: using PCI PM to reset controller\n"); 3967 3968 /* This is very nearly the same thing as 3969 3970 pci_save_state(pci_dev); 3971 pci_set_power_state(pci_dev, PCI_D3hot); 3972 pci_set_power_state(pci_dev, PCI_D0); 3973 pci_restore_state(pci_dev); 3974 3975 but we can't use these nice canned kernel routines on 3976 kexec, because they also check the MSI/MSI-X state in PCI 3977 configuration space and do the wrong thing when it is 3978 set/cleared. Also, the pci_save/restore_state functions 3979 violate the ordering requirements for restoring the 3980 configuration space from the CCISS document (see the 3981 comment below). So we roll our own .... */ 3982 3983 for (i = 0; i < 32; i++) 3984 pci_read_config_word(pdev, 2*i, &saved_config_space[i]); 3985 3986 pos = pci_find_capability(pdev, PCI_CAP_ID_PM); 3987 if (pos == 0) { 3988 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n"); 3989 return -ENODEV; 3990 } 3991 3992 /* Quoting from the Open CISS Specification: "The Power 3993 * Management Control/Status Register (CSR) controls the power 3994 * state of the device. The normal operating state is D0, 3995 * CSR=00h. The software off state is D3, CSR=03h. To reset 3996 * the controller, place the interface device in D3 then to 3997 * D0, this causes a secondary PCI reset which will reset the 3998 * controller." */ 3999 4000 /* enter the D3hot power management state */ 4001 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); 4002 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4003 pmcsr |= PCI_D3hot; 4004 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4005 4006 schedule_timeout_uninterruptible(HZ >> 1); 4007 4008 /* enter the D0 power management state */ 4009 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4010 pmcsr |= PCI_D0; 4011 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4012 4013 schedule_timeout_uninterruptible(HZ >> 1); 4014 4015 /* Restore the PCI configuration space. The Open CISS 4016 * Specification says, "Restore the PCI Configuration 4017 * Registers, offsets 00h through 60h. It is important to 4018 * restore the command register, 16-bits at offset 04h, 4019 * last. Do not restore the configuration status register, 4020 * 16-bits at offset 06h." Note that the offset is 2*i. */ 4021 for (i = 0; i < 32; i++) { 4022 if (i == 2 || i == 3) 4023 continue; 4024 pci_write_config_word(pdev, 2*i, saved_config_space[i]); 4025 } 4026 wmb(); 4027 pci_write_config_word(pdev, 4, saved_config_space[2]); 4028 4029 return 0; 4030} 4031 4032/* 4033 * This is it. Find all the controllers and register them. I really hate 4034 * stealing all these major device numbers. 4035 * returns the number of block devices registered. 4036 */ 4037static int __devinit cciss_init_one(struct pci_dev *pdev, 4038 const struct pci_device_id *ent) 4039{ 4040 int i; 4041 int j = 0; 4042 int rc; 4043 int dac, return_code; 4044 InquiryData_struct *inq_buff; 4045 4046 if (reset_devices) { 4047 /* Reset the controller with a PCI power-cycle */ 4048 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev)) 4049 return -ENODEV; 4050 4051 /* Now try to get the controller to respond to a no-op. Some 4052 devices (notably the HP Smart Array 5i Controller) need 4053 up to 30 seconds to respond. */ 4054 for (i=0; i<30; i++) { 4055 if (cciss_noop(pdev) == 0) 4056 break; 4057 4058 schedule_timeout_uninterruptible(HZ); 4059 } 4060 if (i == 30) { 4061 printk(KERN_ERR "cciss: controller seems dead\n"); 4062 return -EBUSY; 4063 } 4064 } 4065 4066 i = alloc_cciss_hba(); 4067 if (i < 0) 4068 return -1; 4069 4070 hba[i]->busy_initializing = 1; 4071 INIT_HLIST_HEAD(&hba[i]->cmpQ); 4072 INIT_HLIST_HEAD(&hba[i]->reqQ); 4073 mutex_init(&hba[i]->busy_shutting_down); 4074 4075 if (cciss_pci_init(hba[i], pdev) != 0) 4076 goto clean_no_release_regions; 4077 4078 sprintf(hba[i]->devname, "cciss%d", i); 4079 hba[i]->ctlr = i; 4080 hba[i]->pdev = pdev; 4081 4082 init_completion(&hba[i]->scan_wait); 4083 4084 if (cciss_create_hba_sysfs_entry(hba[i])) 4085 goto clean0; 4086 4087 /* configure PCI DMA stuff */ 4088 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) 4089 dac = 1; 4090 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) 4091 dac = 0; 4092 else { 4093 printk(KERN_ERR "cciss: no suitable DMA available\n"); 4094 goto clean1; 4095 } 4096 4097 /* 4098 * register with the major number, or get a dynamic major number 4099 * by passing 0 as argument. This is done for greater than 4100 * 8 controller support. 4101 */ 4102 if (i < MAX_CTLR_ORIG) 4103 hba[i]->major = COMPAQ_CISS_MAJOR + i; 4104 rc = register_blkdev(hba[i]->major, hba[i]->devname); 4105 if (rc == -EBUSY || rc == -EINVAL) { 4106 printk(KERN_ERR 4107 "cciss: Unable to get major number %d for %s " 4108 "on hba %d\n", hba[i]->major, hba[i]->devname, i); 4109 goto clean1; 4110 } else { 4111 if (i >= MAX_CTLR_ORIG) 4112 hba[i]->major = rc; 4113 } 4114 4115 /* make sure the board interrupts are off */ 4116 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF); 4117 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr, 4118 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) { 4119 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n", 4120 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname); 4121 goto clean2; 4122 } 4123 4124 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n", 4125 hba[i]->devname, pdev->device, pci_name(pdev), 4126 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not"); 4127 4128 hba[i]->cmd_pool_bits = 4129 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4130 * sizeof(unsigned long), GFP_KERNEL); 4131 hba[i]->cmd_pool = (CommandList_struct *) 4132 pci_alloc_consistent(hba[i]->pdev, 4133 hba[i]->nr_cmds * sizeof(CommandList_struct), 4134 &(hba[i]->cmd_pool_dhandle)); 4135 hba[i]->errinfo_pool = (ErrorInfo_struct *) 4136 pci_alloc_consistent(hba[i]->pdev, 4137 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4138 &(hba[i]->errinfo_pool_dhandle)); 4139 if ((hba[i]->cmd_pool_bits == NULL) 4140 || (hba[i]->cmd_pool == NULL) 4141 || (hba[i]->errinfo_pool == NULL)) { 4142 printk(KERN_ERR "cciss: out of memory"); 4143 goto clean4; 4144 } 4145 spin_lock_init(&hba[i]->lock); 4146 4147 /* Initialize the pdev driver private data. 4148 have it point to hba[i]. */ 4149 pci_set_drvdata(pdev, hba[i]); 4150 /* command and error info recs zeroed out before 4151 they are used */ 4152 memset(hba[i]->cmd_pool_bits, 0, 4153 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4154 * sizeof(unsigned long)); 4155 4156 hba[i]->num_luns = 0; 4157 hba[i]->highest_lun = -1; 4158 for (j = 0; j < CISS_MAX_LUN; j++) { 4159 hba[i]->drv[j] = NULL; 4160 hba[i]->gendisk[j] = NULL; 4161 } 4162 4163 cciss_scsi_setup(i); 4164 4165 /* Turn the interrupts on so we can service requests */ 4166 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON); 4167 4168 /* Get the firmware version */ 4169 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 4170 if (inq_buff == NULL) { 4171 printk(KERN_ERR "cciss: out of memory\n"); 4172 goto clean4; 4173 } 4174 4175 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff, 4176 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD); 4177 if (return_code == IO_OK) { 4178 hba[i]->firm_ver[0] = inq_buff->data_byte[32]; 4179 hba[i]->firm_ver[1] = inq_buff->data_byte[33]; 4180 hba[i]->firm_ver[2] = inq_buff->data_byte[34]; 4181 hba[i]->firm_ver[3] = inq_buff->data_byte[35]; 4182 } else { /* send command failed */ 4183 printk(KERN_WARNING "cciss: unable to determine firmware" 4184 " version of controller\n"); 4185 } 4186 kfree(inq_buff); 4187 4188 cciss_procinit(i); 4189 4190 hba[i]->cciss_max_sectors = 2048; 4191 4192 rebuild_lun_table(hba[i], 1, 0); 4193 hba[i]->busy_initializing = 0; 4194 return 1; 4195 4196clean4: 4197 kfree(hba[i]->cmd_pool_bits); 4198 if (hba[i]->cmd_pool) 4199 pci_free_consistent(hba[i]->pdev, 4200 hba[i]->nr_cmds * sizeof(CommandList_struct), 4201 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4202 if (hba[i]->errinfo_pool) 4203 pci_free_consistent(hba[i]->pdev, 4204 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4205 hba[i]->errinfo_pool, 4206 hba[i]->errinfo_pool_dhandle); 4207 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]); 4208clean2: 4209 unregister_blkdev(hba[i]->major, hba[i]->devname); 4210clean1: 4211 cciss_destroy_hba_sysfs_entry(hba[i]); 4212clean0: 4213 pci_release_regions(pdev); 4214clean_no_release_regions: 4215 hba[i]->busy_initializing = 0; 4216 4217 /* 4218 * Deliberately omit pci_disable_device(): it does something nasty to 4219 * Smart Array controllers that pci_enable_device does not undo 4220 */ 4221 pci_set_drvdata(pdev, NULL); 4222 free_hba(i); 4223 return -1; 4224} 4225 4226static void cciss_shutdown(struct pci_dev *pdev) 4227{ 4228 ctlr_info_t *h; 4229 char *flush_buf; 4230 int return_code; 4231 4232 h = pci_get_drvdata(pdev); 4233 flush_buf = kzalloc(4, GFP_KERNEL); 4234 if (!flush_buf) { 4235 printk(KERN_WARNING 4236 "cciss:%d cache not flushed, out of memory.\n", 4237 h->ctlr); 4238 return; 4239 } 4240 /* write all data in the battery backed cache to disk */ 4241 memset(flush_buf, 0, 4); 4242 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf, 4243 4, 0, CTLR_LUNID, TYPE_CMD); 4244 kfree(flush_buf); 4245 if (return_code != IO_OK) 4246 printk(KERN_WARNING "cciss%d: Error flushing cache\n", 4247 h->ctlr); 4248 h->access.set_intr_mask(h, CCISS_INTR_OFF); 4249 free_irq(h->intr[2], h); 4250} 4251 4252static void __devexit cciss_remove_one(struct pci_dev *pdev) 4253{ 4254 ctlr_info_t *tmp_ptr; 4255 int i, j; 4256 4257 if (pci_get_drvdata(pdev) == NULL) { 4258 printk(KERN_ERR "cciss: Unable to remove device \n"); 4259 return; 4260 } 4261 4262 tmp_ptr = pci_get_drvdata(pdev); 4263 i = tmp_ptr->ctlr; 4264 if (hba[i] == NULL) { 4265 printk(KERN_ERR "cciss: device appears to " 4266 "already be removed \n"); 4267 return; 4268 } 4269 4270 mutex_lock(&hba[i]->busy_shutting_down); 4271 4272 remove_from_scan_list(hba[i]); 4273 remove_proc_entry(hba[i]->devname, proc_cciss); 4274 unregister_blkdev(hba[i]->major, hba[i]->devname); 4275 4276 /* remove it from the disk list */ 4277 for (j = 0; j < CISS_MAX_LUN; j++) { 4278 struct gendisk *disk = hba[i]->gendisk[j]; 4279 if (disk) { 4280 struct request_queue *q = disk->queue; 4281 4282 if (disk->flags & GENHD_FL_UP) { 4283 cciss_destroy_ld_sysfs_entry(hba[i], j, 1); 4284 del_gendisk(disk); 4285 } 4286 if (q) 4287 blk_cleanup_queue(q); 4288 } 4289 } 4290 4291#ifdef CONFIG_CISS_SCSI_TAPE 4292 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */ 4293#endif 4294 4295 cciss_shutdown(pdev); 4296 4297#ifdef CONFIG_PCI_MSI 4298 if (hba[i]->msix_vector) 4299 pci_disable_msix(hba[i]->pdev); 4300 else if (hba[i]->msi_vector) 4301 pci_disable_msi(hba[i]->pdev); 4302#endif /* CONFIG_PCI_MSI */ 4303 4304 iounmap(hba[i]->vaddr); 4305 4306 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct), 4307 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4308 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4309 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle); 4310 kfree(hba[i]->cmd_pool_bits); 4311 /* 4312 * Deliberately omit pci_disable_device(): it does something nasty to 4313 * Smart Array controllers that pci_enable_device does not undo 4314 */ 4315 pci_release_regions(pdev); 4316 pci_set_drvdata(pdev, NULL); 4317 cciss_destroy_hba_sysfs_entry(hba[i]); 4318 mutex_unlock(&hba[i]->busy_shutting_down); 4319 free_hba(i); 4320} 4321 4322static struct pci_driver cciss_pci_driver = { 4323 .name = "cciss", 4324 .probe = cciss_init_one, 4325 .remove = __devexit_p(cciss_remove_one), 4326 .id_table = cciss_pci_device_id, /* id_table */ 4327 .shutdown = cciss_shutdown, 4328}; 4329 4330/* 4331 * This is it. Register the PCI driver information for the cards we control 4332 * the OS will call our registered routines when it finds one of our cards. 4333 */ 4334static int __init cciss_init(void) 4335{ 4336 int err; 4337 4338 /* 4339 * The hardware requires that commands are aligned on a 64-bit 4340 * boundary. Given that we use pci_alloc_consistent() to allocate an 4341 * array of them, the size must be a multiple of 8 bytes. 4342 */ 4343 BUILD_BUG_ON(sizeof(CommandList_struct) % 8); 4344 4345 printk(KERN_INFO DRIVER_NAME "\n"); 4346 4347 err = bus_register(&cciss_bus_type); 4348 if (err) 4349 return err; 4350 4351 /* Start the scan thread */ 4352 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan"); 4353 if (IS_ERR(cciss_scan_thread)) { 4354 err = PTR_ERR(cciss_scan_thread); 4355 goto err_bus_unregister; 4356 } 4357 4358 /* Register for our PCI devices */ 4359 err = pci_register_driver(&cciss_pci_driver); 4360 if (err) 4361 goto err_thread_stop; 4362 4363 return err; 4364 4365err_thread_stop: 4366 kthread_stop(cciss_scan_thread); 4367err_bus_unregister: 4368 bus_unregister(&cciss_bus_type); 4369 4370 return err; 4371} 4372 4373static void __exit cciss_cleanup(void) 4374{ 4375 int i; 4376 4377 pci_unregister_driver(&cciss_pci_driver); 4378 /* double check that all controller entrys have been removed */ 4379 for (i = 0; i < MAX_CTLR; i++) { 4380 if (hba[i] != NULL) { 4381 printk(KERN_WARNING "cciss: had to remove" 4382 " controller %d\n", i); 4383 cciss_remove_one(hba[i]->pdev); 4384 } 4385 } 4386 kthread_stop(cciss_scan_thread); 4387 remove_proc_entry("driver/cciss", NULL); 4388 bus_unregister(&cciss_bus_type); 4389} 4390 4391static void fail_all_cmds(unsigned long ctlr) 4392{ 4393 /* If we get here, the board is apparently dead. */ 4394 ctlr_info_t *h = hba[ctlr]; 4395 CommandList_struct *c; 4396 unsigned long flags; 4397 4398 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr); 4399 h->alive = 0; /* the controller apparently died... */ 4400 4401 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 4402 4403 pci_disable_device(h->pdev); /* Make sure it is really dead. */ 4404 4405 /* move everything off the request queue onto the completed queue */ 4406 while (!hlist_empty(&h->reqQ)) { 4407 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 4408 removeQ(c); 4409 h->Qdepth--; 4410 addQ(&h->cmpQ, c); 4411 } 4412 4413 /* Now, fail everything on the completed queue with a HW error */ 4414 while (!hlist_empty(&h->cmpQ)) { 4415 c = hlist_entry(h->cmpQ.first, CommandList_struct, list); 4416 removeQ(c); 4417 if (c->cmd_type != CMD_MSG_STALE) 4418 c->err_info->CommandStatus = CMD_HARDWARE_ERR; 4419 if (c->cmd_type == CMD_RWREQ) { 4420 complete_command(h, c, 0); 4421 } else if (c->cmd_type == CMD_IOCTL_PEND) 4422 complete(c->waiting); 4423#ifdef CONFIG_CISS_SCSI_TAPE 4424 else if (c->cmd_type == CMD_SCSI) 4425 complete_scsi_command(c, 0, 0); 4426#endif 4427 } 4428 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 4429 return; 4430} 4431 4432module_init(cciss_init); 4433module_exit(cciss_cleanup); 4434