cciss.c revision 983333cb0c445c56808502461bbb34876c63eb2b
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 71#include "cciss_cmd.h" 72#include "cciss.h" 73#include <linux/cciss_ioctl.h> 74 75/* define the PCI info for the cards we can control */ 76static const struct pci_device_id cciss_pci_device_id[] = { 77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070}, 78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080}, 79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082}, 80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083}, 81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091}, 82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A}, 83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B}, 84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C}, 85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D}, 86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225}, 87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223}, 88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234}, 89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235}, 90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211}, 91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212}, 92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213}, 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214}, 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215}, 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237}, 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D}, 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241}, 98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243}, 99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245}, 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247}, 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249}, 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A}, 103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B}, 104 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 105 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0}, 106 {0,} 107}; 108 109MODULE_DEVICE_TABLE(pci, cciss_pci_device_id); 110 111/* board_id = Subsystem Device ID & Vendor ID 112 * product = Marketing Name for the board 113 * access = Address of the struct of function pointers 114 */ 115static struct board_type products[] = { 116 {0x40700E11, "Smart Array 5300", &SA5_access}, 117 {0x40800E11, "Smart Array 5i", &SA5B_access}, 118 {0x40820E11, "Smart Array 532", &SA5B_access}, 119 {0x40830E11, "Smart Array 5312", &SA5B_access}, 120 {0x409A0E11, "Smart Array 641", &SA5_access}, 121 {0x409B0E11, "Smart Array 642", &SA5_access}, 122 {0x409C0E11, "Smart Array 6400", &SA5_access}, 123 {0x409D0E11, "Smart Array 6400 EM", &SA5_access}, 124 {0x40910E11, "Smart Array 6i", &SA5_access}, 125 {0x3225103C, "Smart Array P600", &SA5_access}, 126 {0x3223103C, "Smart Array P800", &SA5_access}, 127 {0x3234103C, "Smart Array P400", &SA5_access}, 128 {0x3235103C, "Smart Array P400i", &SA5_access}, 129 {0x3211103C, "Smart Array E200i", &SA5_access}, 130 {0x3212103C, "Smart Array E200", &SA5_access}, 131 {0x3213103C, "Smart Array E200i", &SA5_access}, 132 {0x3214103C, "Smart Array E200i", &SA5_access}, 133 {0x3215103C, "Smart Array E200i", &SA5_access}, 134 {0x3237103C, "Smart Array E500", &SA5_access}, 135 {0x323D103C, "Smart Array P700m", &SA5_access}, 136 {0x3241103C, "Smart Array P212", &SA5_access}, 137 {0x3243103C, "Smart Array P410", &SA5_access}, 138 {0x3245103C, "Smart Array P410i", &SA5_access}, 139 {0x3247103C, "Smart Array P411", &SA5_access}, 140 {0x3249103C, "Smart Array P812", &SA5_access}, 141 {0x324A103C, "Smart Array P712m", &SA5_access}, 142 {0x324B103C, "Smart Array P711m", &SA5_access}, 143 {0xFFFF103C, "Unknown Smart Array", &SA5_access}, 144}; 145 146/* How long to wait (in milliseconds) for board to go into simple mode */ 147#define MAX_CONFIG_WAIT 30000 148#define MAX_IOCTL_CONFIG_WAIT 1000 149 150/*define how many times we will try a command because of bus resets */ 151#define MAX_CMD_RETRIES 3 152 153#define MAX_CTLR 32 154 155/* Originally cciss driver only supports 8 major numbers */ 156#define MAX_CTLR_ORIG 8 157 158static ctlr_info_t *hba[MAX_CTLR]; 159 160static struct task_struct *cciss_scan_thread; 161static DEFINE_MUTEX(scan_mutex); 162static LIST_HEAD(scan_q); 163 164static void do_cciss_request(struct request_queue *q); 165static irqreturn_t do_cciss_intr(int irq, void *dev_id); 166static int cciss_open(struct block_device *bdev, fmode_t mode); 167static int cciss_release(struct gendisk *disk, fmode_t mode); 168static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 169 unsigned int cmd, unsigned long arg); 170static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); 171 172static int cciss_revalidate(struct gendisk *disk); 173static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl); 174static int deregister_disk(ctlr_info_t *h, int drv_index, 175 int clear_all, int via_ioctl); 176 177static void cciss_read_capacity(int ctlr, int logvol, int withirq, 178 sector_t *total_size, unsigned int *block_size); 179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq, 180 sector_t *total_size, unsigned int *block_size); 181static void cciss_geometry_inquiry(int ctlr, int logvol, 182 int withirq, sector_t total_size, 183 unsigned int block_size, InquiryData_struct *inq_buff, 184 drive_info_struct *drv); 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *, 186 __u32); 187static void start_io(ctlr_info_t *h); 188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type); 190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 191 __u8 page_code, unsigned char scsi3addr[], 192 int cmd_type); 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 194 int attempt_retry); 195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c); 196 197static void fail_all_cmds(unsigned long ctlr); 198static int add_to_scan_list(struct ctlr_info *h); 199static int scan_thread(void *data); 200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c); 201static void cciss_hba_release(struct device *dev); 202static void cciss_device_release(struct device *dev); 203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index); 204 205#ifdef CONFIG_PROC_FS 206static void cciss_procinit(int i); 207#else 208static void cciss_procinit(int i) 209{ 210} 211#endif /* CONFIG_PROC_FS */ 212 213#ifdef CONFIG_COMPAT 214static int cciss_compat_ioctl(struct block_device *, fmode_t, 215 unsigned, unsigned long); 216#endif 217 218static const struct block_device_operations cciss_fops = { 219 .owner = THIS_MODULE, 220 .open = cciss_open, 221 .release = cciss_release, 222 .locked_ioctl = cciss_ioctl, 223 .getgeo = cciss_getgeo, 224#ifdef CONFIG_COMPAT 225 .compat_ioctl = cciss_compat_ioctl, 226#endif 227 .revalidate_disk = cciss_revalidate, 228}; 229 230/* 231 * Enqueuing and dequeuing functions for cmdlists. 232 */ 233static inline void addQ(struct hlist_head *list, CommandList_struct *c) 234{ 235 hlist_add_head(&c->list, list); 236} 237 238static inline void removeQ(CommandList_struct *c) 239{ 240 /* 241 * After kexec/dump some commands might still 242 * be in flight, which the firmware will try 243 * to complete. Resetting the firmware doesn't work 244 * with old fw revisions, so we have to mark 245 * them off as 'stale' to prevent the driver from 246 * falling over. 247 */ 248 if (WARN_ON(hlist_unhashed(&c->list))) { 249 c->cmd_type = CMD_MSG_STALE; 250 return; 251 } 252 253 hlist_del_init(&c->list); 254} 255 256#include "cciss_scsi.c" /* For SCSI tape support */ 257 258#define RAID_UNKNOWN 6 259 260#ifdef CONFIG_PROC_FS 261 262/* 263 * Report information about this controller. 264 */ 265#define ENG_GIG 1000000000 266#define ENG_GIG_FACTOR (ENG_GIG/512) 267#define ENGAGE_SCSI "engage scsi" 268static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", 269 "UNKNOWN" 270}; 271 272static struct proc_dir_entry *proc_cciss; 273 274static void cciss_seq_show_header(struct seq_file *seq) 275{ 276 ctlr_info_t *h = seq->private; 277 278 seq_printf(seq, "%s: HP %s Controller\n" 279 "Board ID: 0x%08lx\n" 280 "Firmware Version: %c%c%c%c\n" 281 "IRQ: %d\n" 282 "Logical drives: %d\n" 283 "Current Q depth: %d\n" 284 "Current # commands on controller: %d\n" 285 "Max Q depth since init: %d\n" 286 "Max # commands on controller since init: %d\n" 287 "Max SG entries since init: %d\n", 288 h->devname, 289 h->product_name, 290 (unsigned long)h->board_id, 291 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], 292 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT], 293 h->num_luns, 294 h->Qdepth, h->commands_outstanding, 295 h->maxQsinceinit, h->max_outstanding, h->maxSG); 296 297#ifdef CONFIG_CISS_SCSI_TAPE 298 cciss_seq_tape_report(seq, h->ctlr); 299#endif /* CONFIG_CISS_SCSI_TAPE */ 300} 301 302static void *cciss_seq_start(struct seq_file *seq, loff_t *pos) 303{ 304 ctlr_info_t *h = seq->private; 305 unsigned ctlr = h->ctlr; 306 unsigned long flags; 307 308 /* prevent displaying bogus info during configuration 309 * or deconfiguration of a logical volume 310 */ 311 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 312 if (h->busy_configuring) { 313 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 314 return ERR_PTR(-EBUSY); 315 } 316 h->busy_configuring = 1; 317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 318 319 if (*pos == 0) 320 cciss_seq_show_header(seq); 321 322 return pos; 323} 324 325static int cciss_seq_show(struct seq_file *seq, void *v) 326{ 327 sector_t vol_sz, vol_sz_frac; 328 ctlr_info_t *h = seq->private; 329 unsigned ctlr = h->ctlr; 330 loff_t *pos = v; 331 drive_info_struct *drv = &h->drv[*pos]; 332 333 if (*pos > h->highest_lun) 334 return 0; 335 336 if (drv->heads == 0) 337 return 0; 338 339 vol_sz = drv->nr_blocks; 340 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR); 341 vol_sz_frac *= 100; 342 sector_div(vol_sz_frac, ENG_GIG_FACTOR); 343 344 if (drv->raid_level > 5) 345 drv->raid_level = RAID_UNKNOWN; 346 seq_printf(seq, "cciss/c%dd%d:" 347 "\t%4u.%02uGB\tRAID %s\n", 348 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac, 349 raid_label[drv->raid_level]); 350 return 0; 351} 352 353static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos) 354{ 355 ctlr_info_t *h = seq->private; 356 357 if (*pos > h->highest_lun) 358 return NULL; 359 *pos += 1; 360 361 return pos; 362} 363 364static void cciss_seq_stop(struct seq_file *seq, void *v) 365{ 366 ctlr_info_t *h = seq->private; 367 368 /* Only reset h->busy_configuring if we succeeded in setting 369 * it during cciss_seq_start. */ 370 if (v == ERR_PTR(-EBUSY)) 371 return; 372 373 h->busy_configuring = 0; 374} 375 376static const struct seq_operations cciss_seq_ops = { 377 .start = cciss_seq_start, 378 .show = cciss_seq_show, 379 .next = cciss_seq_next, 380 .stop = cciss_seq_stop, 381}; 382 383static int cciss_seq_open(struct inode *inode, struct file *file) 384{ 385 int ret = seq_open(file, &cciss_seq_ops); 386 struct seq_file *seq = file->private_data; 387 388 if (!ret) 389 seq->private = PDE(inode)->data; 390 391 return ret; 392} 393 394static ssize_t 395cciss_proc_write(struct file *file, const char __user *buf, 396 size_t length, loff_t *ppos) 397{ 398 int err; 399 char *buffer; 400 401#ifndef CONFIG_CISS_SCSI_TAPE 402 return -EINVAL; 403#endif 404 405 if (!buf || length > PAGE_SIZE - 1) 406 return -EINVAL; 407 408 buffer = (char *)__get_free_page(GFP_KERNEL); 409 if (!buffer) 410 return -ENOMEM; 411 412 err = -EFAULT; 413 if (copy_from_user(buffer, buf, length)) 414 goto out; 415 buffer[length] = '\0'; 416 417#ifdef CONFIG_CISS_SCSI_TAPE 418 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) { 419 struct seq_file *seq = file->private_data; 420 ctlr_info_t *h = seq->private; 421 int rc; 422 423 rc = cciss_engage_scsi(h->ctlr); 424 if (rc != 0) 425 err = -rc; 426 else 427 err = length; 428 } else 429#endif /* CONFIG_CISS_SCSI_TAPE */ 430 err = -EINVAL; 431 /* might be nice to have "disengage" too, but it's not 432 safely possible. (only 1 module use count, lock issues.) */ 433 434out: 435 free_page((unsigned long)buffer); 436 return err; 437} 438 439static struct file_operations cciss_proc_fops = { 440 .owner = THIS_MODULE, 441 .open = cciss_seq_open, 442 .read = seq_read, 443 .llseek = seq_lseek, 444 .release = seq_release, 445 .write = cciss_proc_write, 446}; 447 448static void __devinit cciss_procinit(int i) 449{ 450 struct proc_dir_entry *pde; 451 452 if (proc_cciss == NULL) 453 proc_cciss = proc_mkdir("driver/cciss", NULL); 454 if (!proc_cciss) 455 return; 456 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP | 457 S_IROTH, proc_cciss, 458 &cciss_proc_fops, hba[i]); 459} 460#endif /* CONFIG_PROC_FS */ 461 462#define MAX_PRODUCT_NAME_LEN 19 463 464#define to_hba(n) container_of(n, struct ctlr_info, dev) 465 466static ssize_t host_store_rescan(struct device *dev, 467 struct device_attribute *attr, 468 const char *buf, size_t count) 469{ 470 struct ctlr_info *h = to_hba(dev); 471 472 add_to_scan_list(h); 473 wake_up_process(cciss_scan_thread); 474 wait_for_completion_interruptible(&h->scan_wait); 475 476 return count; 477} 478DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); 479 480static ssize_t dev_show_unique_id(struct device *dev, 481 struct device_attribute *attr, 482 char *buf) 483{ 484 drive_info_struct *drv = dev_get_drvdata(dev); 485 struct ctlr_info *h = to_hba(drv->dev->parent); 486 __u8 sn[16]; 487 unsigned long flags; 488 int ret = 0; 489 490 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 491 if (h->busy_configuring) 492 ret = -EBUSY; 493 else 494 memcpy(sn, drv->serial_no, sizeof(sn)); 495 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 496 497 if (ret) 498 return ret; 499 else 500 return snprintf(buf, 16 * 2 + 2, 501 "%02X%02X%02X%02X%02X%02X%02X%02X" 502 "%02X%02X%02X%02X%02X%02X%02X%02X\n", 503 sn[0], sn[1], sn[2], sn[3], 504 sn[4], sn[5], sn[6], sn[7], 505 sn[8], sn[9], sn[10], sn[11], 506 sn[12], sn[13], sn[14], sn[15]); 507} 508DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL); 509 510static ssize_t dev_show_vendor(struct device *dev, 511 struct device_attribute *attr, 512 char *buf) 513{ 514 drive_info_struct *drv = dev_get_drvdata(dev); 515 struct ctlr_info *h = to_hba(drv->dev->parent); 516 char vendor[VENDOR_LEN + 1]; 517 unsigned long flags; 518 int ret = 0; 519 520 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 521 if (h->busy_configuring) 522 ret = -EBUSY; 523 else 524 memcpy(vendor, drv->vendor, VENDOR_LEN + 1); 525 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 526 527 if (ret) 528 return ret; 529 else 530 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor); 531} 532DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL); 533 534static ssize_t dev_show_model(struct device *dev, 535 struct device_attribute *attr, 536 char *buf) 537{ 538 drive_info_struct *drv = dev_get_drvdata(dev); 539 struct ctlr_info *h = to_hba(drv->dev->parent); 540 char model[MODEL_LEN + 1]; 541 unsigned long flags; 542 int ret = 0; 543 544 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 545 if (h->busy_configuring) 546 ret = -EBUSY; 547 else 548 memcpy(model, drv->model, MODEL_LEN + 1); 549 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 550 551 if (ret) 552 return ret; 553 else 554 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model); 555} 556DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL); 557 558static ssize_t dev_show_rev(struct device *dev, 559 struct device_attribute *attr, 560 char *buf) 561{ 562 drive_info_struct *drv = dev_get_drvdata(dev); 563 struct ctlr_info *h = to_hba(drv->dev->parent); 564 char rev[REV_LEN + 1]; 565 unsigned long flags; 566 int ret = 0; 567 568 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 569 if (h->busy_configuring) 570 ret = -EBUSY; 571 else 572 memcpy(rev, drv->rev, REV_LEN + 1); 573 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 574 575 if (ret) 576 return ret; 577 else 578 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev); 579} 580DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); 581 582static struct attribute *cciss_host_attrs[] = { 583 &dev_attr_rescan.attr, 584 NULL 585}; 586 587static struct attribute_group cciss_host_attr_group = { 588 .attrs = cciss_host_attrs, 589}; 590 591static struct attribute_group *cciss_host_attr_groups[] = { 592 &cciss_host_attr_group, 593 NULL 594}; 595 596static struct device_type cciss_host_type = { 597 .name = "cciss_host", 598 .groups = cciss_host_attr_groups, 599 .release = cciss_hba_release, 600}; 601 602static struct attribute *cciss_dev_attrs[] = { 603 &dev_attr_unique_id.attr, 604 &dev_attr_model.attr, 605 &dev_attr_vendor.attr, 606 &dev_attr_rev.attr, 607 NULL 608}; 609 610static struct attribute_group cciss_dev_attr_group = { 611 .attrs = cciss_dev_attrs, 612}; 613 614static const struct attribute_group *cciss_dev_attr_groups[] = { 615 &cciss_dev_attr_group, 616 NULL 617}; 618 619static struct device_type cciss_dev_type = { 620 .name = "cciss_device", 621 .groups = cciss_dev_attr_groups, 622 .release = cciss_device_release, 623}; 624 625static struct bus_type cciss_bus_type = { 626 .name = "cciss", 627}; 628 629/* 630 * cciss_hba_release is called when the reference count 631 * of h->dev goes to zero. 632 */ 633static void cciss_hba_release(struct device *dev) 634{ 635 /* 636 * nothing to do, but need this to avoid a warning 637 * about not having a release handler from lib/kref.c. 638 */ 639} 640 641/* 642 * Initialize sysfs entry for each controller. This sets up and registers 643 * the 'cciss#' directory for each individual controller under 644 * /sys/bus/pci/devices/<dev>/. 645 */ 646static int cciss_create_hba_sysfs_entry(struct ctlr_info *h) 647{ 648 device_initialize(&h->dev); 649 h->dev.type = &cciss_host_type; 650 h->dev.bus = &cciss_bus_type; 651 dev_set_name(&h->dev, "%s", h->devname); 652 h->dev.parent = &h->pdev->dev; 653 654 return device_add(&h->dev); 655} 656 657/* 658 * Remove sysfs entries for an hba. 659 */ 660static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h) 661{ 662 device_del(&h->dev); 663 put_device(&h->dev); /* final put. */ 664} 665 666/* cciss_device_release is called when the reference count 667 * of h->drv[x].dev goes to zero. 668 */ 669static void cciss_device_release(struct device *dev) 670{ 671 kfree(dev); 672} 673 674/* 675 * Initialize sysfs for each logical drive. This sets up and registers 676 * the 'c#d#' directory for each individual logical drive under 677 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from 678 * /sys/block/cciss!c#d# to this entry. 679 */ 680static long cciss_create_ld_sysfs_entry(struct ctlr_info *h, 681 int drv_index) 682{ 683 struct device *dev; 684 685 /* Special case for c*d0, we only create it once. */ 686 if (drv_index == 0 && h->drv[drv_index].dev != NULL) 687 return 0; 688 689 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 690 if (!dev) 691 return -ENOMEM; 692 device_initialize(dev); 693 dev->type = &cciss_dev_type; 694 dev->bus = &cciss_bus_type; 695 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index); 696 dev->parent = &h->dev; 697 h->drv[drv_index].dev = dev; 698 dev_set_drvdata(dev, &h->drv[drv_index]); 699 return device_add(dev); 700} 701 702/* 703 * Remove sysfs entries for a logical drive. 704 */ 705static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index, 706 int ctlr_exiting) 707{ 708 struct device *dev = h->drv[drv_index].dev; 709 710 /* special case for c*d0, we only destroy it on controller exit */ 711 if (drv_index == 0 && !ctlr_exiting) 712 return; 713 714 device_del(dev); 715 put_device(dev); /* the "final" put. */ 716 h->drv[drv_index].dev = NULL; 717} 718 719/* 720 * For operations that cannot sleep, a command block is allocated at init, 721 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track 722 * which ones are free or in use. For operations that can wait for kmalloc 723 * to possible sleep, this routine can be called with get_from_pool set to 0. 724 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was. 725 */ 726static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool) 727{ 728 CommandList_struct *c; 729 int i; 730 u64bit temp64; 731 dma_addr_t cmd_dma_handle, err_dma_handle; 732 733 if (!get_from_pool) { 734 c = (CommandList_struct *) pci_alloc_consistent(h->pdev, 735 sizeof(CommandList_struct), &cmd_dma_handle); 736 if (c == NULL) 737 return NULL; 738 memset(c, 0, sizeof(CommandList_struct)); 739 740 c->cmdindex = -1; 741 742 c->err_info = (ErrorInfo_struct *) 743 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct), 744 &err_dma_handle); 745 746 if (c->err_info == NULL) { 747 pci_free_consistent(h->pdev, 748 sizeof(CommandList_struct), c, cmd_dma_handle); 749 return NULL; 750 } 751 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 752 } else { /* get it out of the controllers pool */ 753 754 do { 755 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); 756 if (i == h->nr_cmds) 757 return NULL; 758 } while (test_and_set_bit 759 (i & (BITS_PER_LONG - 1), 760 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); 761#ifdef CCISS_DEBUG 762 printk(KERN_DEBUG "cciss: using command buffer %d\n", i); 763#endif 764 c = h->cmd_pool + i; 765 memset(c, 0, sizeof(CommandList_struct)); 766 cmd_dma_handle = h->cmd_pool_dhandle 767 + i * sizeof(CommandList_struct); 768 c->err_info = h->errinfo_pool + i; 769 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 770 err_dma_handle = h->errinfo_pool_dhandle 771 + i * sizeof(ErrorInfo_struct); 772 h->nr_allocs++; 773 774 c->cmdindex = i; 775 } 776 777 INIT_HLIST_NODE(&c->list); 778 c->busaddr = (__u32) cmd_dma_handle; 779 temp64.val = (__u64) err_dma_handle; 780 c->ErrDesc.Addr.lower = temp64.val32.lower; 781 c->ErrDesc.Addr.upper = temp64.val32.upper; 782 c->ErrDesc.Len = sizeof(ErrorInfo_struct); 783 784 c->ctlr = h->ctlr; 785 return c; 786} 787 788/* 789 * Frees a command block that was previously allocated with cmd_alloc(). 790 */ 791static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool) 792{ 793 int i; 794 u64bit temp64; 795 796 if (!got_from_pool) { 797 temp64.val32.lower = c->ErrDesc.Addr.lower; 798 temp64.val32.upper = c->ErrDesc.Addr.upper; 799 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct), 800 c->err_info, (dma_addr_t) temp64.val); 801 pci_free_consistent(h->pdev, sizeof(CommandList_struct), 802 c, (dma_addr_t) c->busaddr); 803 } else { 804 i = c - h->cmd_pool; 805 clear_bit(i & (BITS_PER_LONG - 1), 806 h->cmd_pool_bits + (i / BITS_PER_LONG)); 807 h->nr_frees++; 808 } 809} 810 811static inline ctlr_info_t *get_host(struct gendisk *disk) 812{ 813 return disk->queue->queuedata; 814} 815 816static inline drive_info_struct *get_drv(struct gendisk *disk) 817{ 818 return disk->private_data; 819} 820 821/* 822 * Open. Make sure the device is really there. 823 */ 824static int cciss_open(struct block_device *bdev, fmode_t mode) 825{ 826 ctlr_info_t *host = get_host(bdev->bd_disk); 827 drive_info_struct *drv = get_drv(bdev->bd_disk); 828 829#ifdef CCISS_DEBUG 830 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name); 831#endif /* CCISS_DEBUG */ 832 833 if (host->busy_initializing || drv->busy_configuring) 834 return -EBUSY; 835 /* 836 * Root is allowed to open raw volume zero even if it's not configured 837 * so array config can still work. Root is also allowed to open any 838 * volume that has a LUN ID, so it can issue IOCTL to reread the 839 * disk information. I don't think I really like this 840 * but I'm already using way to many device nodes to claim another one 841 * for "raw controller". 842 */ 843 if (drv->heads == 0) { 844 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */ 845 /* if not node 0 make sure it is a partition = 0 */ 846 if (MINOR(bdev->bd_dev) & 0x0f) { 847 return -ENXIO; 848 /* if it is, make sure we have a LUN ID */ 849 } else if (drv->LunID == 0) { 850 return -ENXIO; 851 } 852 } 853 if (!capable(CAP_SYS_ADMIN)) 854 return -EPERM; 855 } 856 drv->usage_count++; 857 host->usage_count++; 858 return 0; 859} 860 861/* 862 * Close. Sync first. 863 */ 864static int cciss_release(struct gendisk *disk, fmode_t mode) 865{ 866 ctlr_info_t *host = get_host(disk); 867 drive_info_struct *drv = get_drv(disk); 868 869#ifdef CCISS_DEBUG 870 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name); 871#endif /* CCISS_DEBUG */ 872 873 drv->usage_count--; 874 host->usage_count--; 875 return 0; 876} 877 878#ifdef CONFIG_COMPAT 879 880static int do_ioctl(struct block_device *bdev, fmode_t mode, 881 unsigned cmd, unsigned long arg) 882{ 883 int ret; 884 lock_kernel(); 885 ret = cciss_ioctl(bdev, mode, cmd, arg); 886 unlock_kernel(); 887 return ret; 888} 889 890static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 891 unsigned cmd, unsigned long arg); 892static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 893 unsigned cmd, unsigned long arg); 894 895static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode, 896 unsigned cmd, unsigned long arg) 897{ 898 switch (cmd) { 899 case CCISS_GETPCIINFO: 900 case CCISS_GETINTINFO: 901 case CCISS_SETINTINFO: 902 case CCISS_GETNODENAME: 903 case CCISS_SETNODENAME: 904 case CCISS_GETHEARTBEAT: 905 case CCISS_GETBUSTYPES: 906 case CCISS_GETFIRMVER: 907 case CCISS_GETDRIVVER: 908 case CCISS_REVALIDVOLS: 909 case CCISS_DEREGDISK: 910 case CCISS_REGNEWDISK: 911 case CCISS_REGNEWD: 912 case CCISS_RESCANDISK: 913 case CCISS_GETLUNINFO: 914 return do_ioctl(bdev, mode, cmd, arg); 915 916 case CCISS_PASSTHRU32: 917 return cciss_ioctl32_passthru(bdev, mode, cmd, arg); 918 case CCISS_BIG_PASSTHRU32: 919 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg); 920 921 default: 922 return -ENOIOCTLCMD; 923 } 924} 925 926static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 927 unsigned cmd, unsigned long arg) 928{ 929 IOCTL32_Command_struct __user *arg32 = 930 (IOCTL32_Command_struct __user *) arg; 931 IOCTL_Command_struct arg64; 932 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); 933 int err; 934 u32 cp; 935 936 err = 0; 937 err |= 938 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 939 sizeof(arg64.LUN_info)); 940 err |= 941 copy_from_user(&arg64.Request, &arg32->Request, 942 sizeof(arg64.Request)); 943 err |= 944 copy_from_user(&arg64.error_info, &arg32->error_info, 945 sizeof(arg64.error_info)); 946 err |= get_user(arg64.buf_size, &arg32->buf_size); 947 err |= get_user(cp, &arg32->buf); 948 arg64.buf = compat_ptr(cp); 949 err |= copy_to_user(p, &arg64, sizeof(arg64)); 950 951 if (err) 952 return -EFAULT; 953 954 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p); 955 if (err) 956 return err; 957 err |= 958 copy_in_user(&arg32->error_info, &p->error_info, 959 sizeof(arg32->error_info)); 960 if (err) 961 return -EFAULT; 962 return err; 963} 964 965static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 966 unsigned cmd, unsigned long arg) 967{ 968 BIG_IOCTL32_Command_struct __user *arg32 = 969 (BIG_IOCTL32_Command_struct __user *) arg; 970 BIG_IOCTL_Command_struct arg64; 971 BIG_IOCTL_Command_struct __user *p = 972 compat_alloc_user_space(sizeof(arg64)); 973 int err; 974 u32 cp; 975 976 err = 0; 977 err |= 978 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 979 sizeof(arg64.LUN_info)); 980 err |= 981 copy_from_user(&arg64.Request, &arg32->Request, 982 sizeof(arg64.Request)); 983 err |= 984 copy_from_user(&arg64.error_info, &arg32->error_info, 985 sizeof(arg64.error_info)); 986 err |= get_user(arg64.buf_size, &arg32->buf_size); 987 err |= get_user(arg64.malloc_size, &arg32->malloc_size); 988 err |= get_user(cp, &arg32->buf); 989 arg64.buf = compat_ptr(cp); 990 err |= copy_to_user(p, &arg64, sizeof(arg64)); 991 992 if (err) 993 return -EFAULT; 994 995 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p); 996 if (err) 997 return err; 998 err |= 999 copy_in_user(&arg32->error_info, &p->error_info, 1000 sizeof(arg32->error_info)); 1001 if (err) 1002 return -EFAULT; 1003 return err; 1004} 1005#endif 1006 1007static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1008{ 1009 drive_info_struct *drv = get_drv(bdev->bd_disk); 1010 1011 if (!drv->cylinders) 1012 return -ENXIO; 1013 1014 geo->heads = drv->heads; 1015 geo->sectors = drv->sectors; 1016 geo->cylinders = drv->cylinders; 1017 return 0; 1018} 1019 1020static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c) 1021{ 1022 if (c->err_info->CommandStatus == CMD_TARGET_STATUS && 1023 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) 1024 (void)check_for_unit_attention(host, c); 1025} 1026/* 1027 * ioctl 1028 */ 1029static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 1030 unsigned int cmd, unsigned long arg) 1031{ 1032 struct gendisk *disk = bdev->bd_disk; 1033 ctlr_info_t *host = get_host(disk); 1034 drive_info_struct *drv = get_drv(disk); 1035 int ctlr = host->ctlr; 1036 void __user *argp = (void __user *)arg; 1037 1038#ifdef CCISS_DEBUG 1039 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg); 1040#endif /* CCISS_DEBUG */ 1041 1042 switch (cmd) { 1043 case CCISS_GETPCIINFO: 1044 { 1045 cciss_pci_info_struct pciinfo; 1046 1047 if (!arg) 1048 return -EINVAL; 1049 pciinfo.domain = pci_domain_nr(host->pdev->bus); 1050 pciinfo.bus = host->pdev->bus->number; 1051 pciinfo.dev_fn = host->pdev->devfn; 1052 pciinfo.board_id = host->board_id; 1053 if (copy_to_user 1054 (argp, &pciinfo, sizeof(cciss_pci_info_struct))) 1055 return -EFAULT; 1056 return 0; 1057 } 1058 case CCISS_GETINTINFO: 1059 { 1060 cciss_coalint_struct intinfo; 1061 if (!arg) 1062 return -EINVAL; 1063 intinfo.delay = 1064 readl(&host->cfgtable->HostWrite.CoalIntDelay); 1065 intinfo.count = 1066 readl(&host->cfgtable->HostWrite.CoalIntCount); 1067 if (copy_to_user 1068 (argp, &intinfo, sizeof(cciss_coalint_struct))) 1069 return -EFAULT; 1070 return 0; 1071 } 1072 case CCISS_SETINTINFO: 1073 { 1074 cciss_coalint_struct intinfo; 1075 unsigned long flags; 1076 int i; 1077 1078 if (!arg) 1079 return -EINVAL; 1080 if (!capable(CAP_SYS_ADMIN)) 1081 return -EPERM; 1082 if (copy_from_user 1083 (&intinfo, argp, sizeof(cciss_coalint_struct))) 1084 return -EFAULT; 1085 if ((intinfo.delay == 0) && (intinfo.count == 0)) 1086 { 1087// printk("cciss_ioctl: delay and count cannot be 0\n"); 1088 return -EINVAL; 1089 } 1090 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1091 /* Update the field, and then ring the doorbell */ 1092 writel(intinfo.delay, 1093 &(host->cfgtable->HostWrite.CoalIntDelay)); 1094 writel(intinfo.count, 1095 &(host->cfgtable->HostWrite.CoalIntCount)); 1096 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1097 1098 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1099 if (!(readl(host->vaddr + SA5_DOORBELL) 1100 & CFGTBL_ChangeReq)) 1101 break; 1102 /* delay and try again */ 1103 udelay(1000); 1104 } 1105 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1106 if (i >= MAX_IOCTL_CONFIG_WAIT) 1107 return -EAGAIN; 1108 return 0; 1109 } 1110 case CCISS_GETNODENAME: 1111 { 1112 NodeName_type NodeName; 1113 int i; 1114 1115 if (!arg) 1116 return -EINVAL; 1117 for (i = 0; i < 16; i++) 1118 NodeName[i] = 1119 readb(&host->cfgtable->ServerName[i]); 1120 if (copy_to_user(argp, NodeName, sizeof(NodeName_type))) 1121 return -EFAULT; 1122 return 0; 1123 } 1124 case CCISS_SETNODENAME: 1125 { 1126 NodeName_type NodeName; 1127 unsigned long flags; 1128 int i; 1129 1130 if (!arg) 1131 return -EINVAL; 1132 if (!capable(CAP_SYS_ADMIN)) 1133 return -EPERM; 1134 1135 if (copy_from_user 1136 (NodeName, argp, sizeof(NodeName_type))) 1137 return -EFAULT; 1138 1139 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1140 1141 /* Update the field, and then ring the doorbell */ 1142 for (i = 0; i < 16; i++) 1143 writeb(NodeName[i], 1144 &host->cfgtable->ServerName[i]); 1145 1146 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1147 1148 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1149 if (!(readl(host->vaddr + SA5_DOORBELL) 1150 & CFGTBL_ChangeReq)) 1151 break; 1152 /* delay and try again */ 1153 udelay(1000); 1154 } 1155 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1156 if (i >= MAX_IOCTL_CONFIG_WAIT) 1157 return -EAGAIN; 1158 return 0; 1159 } 1160 1161 case CCISS_GETHEARTBEAT: 1162 { 1163 Heartbeat_type heartbeat; 1164 1165 if (!arg) 1166 return -EINVAL; 1167 heartbeat = readl(&host->cfgtable->HeartBeat); 1168 if (copy_to_user 1169 (argp, &heartbeat, sizeof(Heartbeat_type))) 1170 return -EFAULT; 1171 return 0; 1172 } 1173 case CCISS_GETBUSTYPES: 1174 { 1175 BusTypes_type BusTypes; 1176 1177 if (!arg) 1178 return -EINVAL; 1179 BusTypes = readl(&host->cfgtable->BusTypes); 1180 if (copy_to_user 1181 (argp, &BusTypes, sizeof(BusTypes_type))) 1182 return -EFAULT; 1183 return 0; 1184 } 1185 case CCISS_GETFIRMVER: 1186 { 1187 FirmwareVer_type firmware; 1188 1189 if (!arg) 1190 return -EINVAL; 1191 memcpy(firmware, host->firm_ver, 4); 1192 1193 if (copy_to_user 1194 (argp, firmware, sizeof(FirmwareVer_type))) 1195 return -EFAULT; 1196 return 0; 1197 } 1198 case CCISS_GETDRIVVER: 1199 { 1200 DriverVer_type DriverVer = DRIVER_VERSION; 1201 1202 if (!arg) 1203 return -EINVAL; 1204 1205 if (copy_to_user 1206 (argp, &DriverVer, sizeof(DriverVer_type))) 1207 return -EFAULT; 1208 return 0; 1209 } 1210 1211 case CCISS_DEREGDISK: 1212 case CCISS_REGNEWD: 1213 case CCISS_REVALIDVOLS: 1214 return rebuild_lun_table(host, 0, 1); 1215 1216 case CCISS_GETLUNINFO:{ 1217 LogvolInfo_struct luninfo; 1218 1219 luninfo.LunID = drv->LunID; 1220 luninfo.num_opens = drv->usage_count; 1221 luninfo.num_parts = 0; 1222 if (copy_to_user(argp, &luninfo, 1223 sizeof(LogvolInfo_struct))) 1224 return -EFAULT; 1225 return 0; 1226 } 1227 case CCISS_PASSTHRU: 1228 { 1229 IOCTL_Command_struct iocommand; 1230 CommandList_struct *c; 1231 char *buff = NULL; 1232 u64bit temp64; 1233 unsigned long flags; 1234 DECLARE_COMPLETION_ONSTACK(wait); 1235 1236 if (!arg) 1237 return -EINVAL; 1238 1239 if (!capable(CAP_SYS_RAWIO)) 1240 return -EPERM; 1241 1242 if (copy_from_user 1243 (&iocommand, argp, sizeof(IOCTL_Command_struct))) 1244 return -EFAULT; 1245 if ((iocommand.buf_size < 1) && 1246 (iocommand.Request.Type.Direction != XFER_NONE)) { 1247 return -EINVAL; 1248 } 1249#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */ 1250 /* Check kmalloc limits */ 1251 if (iocommand.buf_size > 128000) 1252 return -EINVAL; 1253#endif 1254 if (iocommand.buf_size > 0) { 1255 buff = kmalloc(iocommand.buf_size, GFP_KERNEL); 1256 if (buff == NULL) 1257 return -EFAULT; 1258 } 1259 if (iocommand.Request.Type.Direction == XFER_WRITE) { 1260 /* Copy the data into the buffer we created */ 1261 if (copy_from_user 1262 (buff, iocommand.buf, iocommand.buf_size)) { 1263 kfree(buff); 1264 return -EFAULT; 1265 } 1266 } else { 1267 memset(buff, 0, iocommand.buf_size); 1268 } 1269 if ((c = cmd_alloc(host, 0)) == NULL) { 1270 kfree(buff); 1271 return -ENOMEM; 1272 } 1273 // Fill in the command type 1274 c->cmd_type = CMD_IOCTL_PEND; 1275 // Fill in Command Header 1276 c->Header.ReplyQueue = 0; // unused in simple mode 1277 if (iocommand.buf_size > 0) // buffer to fill 1278 { 1279 c->Header.SGList = 1; 1280 c->Header.SGTotal = 1; 1281 } else // no buffers to fill 1282 { 1283 c->Header.SGList = 0; 1284 c->Header.SGTotal = 0; 1285 } 1286 c->Header.LUN = iocommand.LUN_info; 1287 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag 1288 1289 // Fill in Request block 1290 c->Request = iocommand.Request; 1291 1292 // Fill in the scatter gather information 1293 if (iocommand.buf_size > 0) { 1294 temp64.val = pci_map_single(host->pdev, buff, 1295 iocommand.buf_size, 1296 PCI_DMA_BIDIRECTIONAL); 1297 c->SG[0].Addr.lower = temp64.val32.lower; 1298 c->SG[0].Addr.upper = temp64.val32.upper; 1299 c->SG[0].Len = iocommand.buf_size; 1300 c->SG[0].Ext = 0; // we are not chaining 1301 } 1302 c->waiting = &wait; 1303 1304 /* Put the request on the tail of the request queue */ 1305 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1306 addQ(&host->reqQ, c); 1307 host->Qdepth++; 1308 start_io(host); 1309 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1310 1311 wait_for_completion(&wait); 1312 1313 /* unlock the buffers from DMA */ 1314 temp64.val32.lower = c->SG[0].Addr.lower; 1315 temp64.val32.upper = c->SG[0].Addr.upper; 1316 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val, 1317 iocommand.buf_size, 1318 PCI_DMA_BIDIRECTIONAL); 1319 1320 check_ioctl_unit_attention(host, c); 1321 1322 /* Copy the error information out */ 1323 iocommand.error_info = *(c->err_info); 1324 if (copy_to_user 1325 (argp, &iocommand, sizeof(IOCTL_Command_struct))) { 1326 kfree(buff); 1327 cmd_free(host, c, 0); 1328 return -EFAULT; 1329 } 1330 1331 if (iocommand.Request.Type.Direction == XFER_READ) { 1332 /* Copy the data out of the buffer we created */ 1333 if (copy_to_user 1334 (iocommand.buf, buff, iocommand.buf_size)) { 1335 kfree(buff); 1336 cmd_free(host, c, 0); 1337 return -EFAULT; 1338 } 1339 } 1340 kfree(buff); 1341 cmd_free(host, c, 0); 1342 return 0; 1343 } 1344 case CCISS_BIG_PASSTHRU:{ 1345 BIG_IOCTL_Command_struct *ioc; 1346 CommandList_struct *c; 1347 unsigned char **buff = NULL; 1348 int *buff_size = NULL; 1349 u64bit temp64; 1350 unsigned long flags; 1351 BYTE sg_used = 0; 1352 int status = 0; 1353 int i; 1354 DECLARE_COMPLETION_ONSTACK(wait); 1355 __u32 left; 1356 __u32 sz; 1357 BYTE __user *data_ptr; 1358 1359 if (!arg) 1360 return -EINVAL; 1361 if (!capable(CAP_SYS_RAWIO)) 1362 return -EPERM; 1363 ioc = (BIG_IOCTL_Command_struct *) 1364 kmalloc(sizeof(*ioc), GFP_KERNEL); 1365 if (!ioc) { 1366 status = -ENOMEM; 1367 goto cleanup1; 1368 } 1369 if (copy_from_user(ioc, argp, sizeof(*ioc))) { 1370 status = -EFAULT; 1371 goto cleanup1; 1372 } 1373 if ((ioc->buf_size < 1) && 1374 (ioc->Request.Type.Direction != XFER_NONE)) { 1375 status = -EINVAL; 1376 goto cleanup1; 1377 } 1378 /* Check kmalloc limits using all SGs */ 1379 if (ioc->malloc_size > MAX_KMALLOC_SIZE) { 1380 status = -EINVAL; 1381 goto cleanup1; 1382 } 1383 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { 1384 status = -EINVAL; 1385 goto cleanup1; 1386 } 1387 buff = 1388 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); 1389 if (!buff) { 1390 status = -ENOMEM; 1391 goto cleanup1; 1392 } 1393 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), 1394 GFP_KERNEL); 1395 if (!buff_size) { 1396 status = -ENOMEM; 1397 goto cleanup1; 1398 } 1399 left = ioc->buf_size; 1400 data_ptr = ioc->buf; 1401 while (left) { 1402 sz = (left > 1403 ioc->malloc_size) ? ioc-> 1404 malloc_size : left; 1405 buff_size[sg_used] = sz; 1406 buff[sg_used] = kmalloc(sz, GFP_KERNEL); 1407 if (buff[sg_used] == NULL) { 1408 status = -ENOMEM; 1409 goto cleanup1; 1410 } 1411 if (ioc->Request.Type.Direction == XFER_WRITE) { 1412 if (copy_from_user 1413 (buff[sg_used], data_ptr, sz)) { 1414 status = -EFAULT; 1415 goto cleanup1; 1416 } 1417 } else { 1418 memset(buff[sg_used], 0, sz); 1419 } 1420 left -= sz; 1421 data_ptr += sz; 1422 sg_used++; 1423 } 1424 if ((c = cmd_alloc(host, 0)) == NULL) { 1425 status = -ENOMEM; 1426 goto cleanup1; 1427 } 1428 c->cmd_type = CMD_IOCTL_PEND; 1429 c->Header.ReplyQueue = 0; 1430 1431 if (ioc->buf_size > 0) { 1432 c->Header.SGList = sg_used; 1433 c->Header.SGTotal = sg_used; 1434 } else { 1435 c->Header.SGList = 0; 1436 c->Header.SGTotal = 0; 1437 } 1438 c->Header.LUN = ioc->LUN_info; 1439 c->Header.Tag.lower = c->busaddr; 1440 1441 c->Request = ioc->Request; 1442 if (ioc->buf_size > 0) { 1443 int i; 1444 for (i = 0; i < sg_used; i++) { 1445 temp64.val = 1446 pci_map_single(host->pdev, buff[i], 1447 buff_size[i], 1448 PCI_DMA_BIDIRECTIONAL); 1449 c->SG[i].Addr.lower = 1450 temp64.val32.lower; 1451 c->SG[i].Addr.upper = 1452 temp64.val32.upper; 1453 c->SG[i].Len = buff_size[i]; 1454 c->SG[i].Ext = 0; /* we are not chaining */ 1455 } 1456 } 1457 c->waiting = &wait; 1458 /* Put the request on the tail of the request queue */ 1459 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1460 addQ(&host->reqQ, c); 1461 host->Qdepth++; 1462 start_io(host); 1463 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1464 wait_for_completion(&wait); 1465 /* unlock the buffers from DMA */ 1466 for (i = 0; i < sg_used; i++) { 1467 temp64.val32.lower = c->SG[i].Addr.lower; 1468 temp64.val32.upper = c->SG[i].Addr.upper; 1469 pci_unmap_single(host->pdev, 1470 (dma_addr_t) temp64.val, buff_size[i], 1471 PCI_DMA_BIDIRECTIONAL); 1472 } 1473 check_ioctl_unit_attention(host, c); 1474 /* Copy the error information out */ 1475 ioc->error_info = *(c->err_info); 1476 if (copy_to_user(argp, ioc, sizeof(*ioc))) { 1477 cmd_free(host, c, 0); 1478 status = -EFAULT; 1479 goto cleanup1; 1480 } 1481 if (ioc->Request.Type.Direction == XFER_READ) { 1482 /* Copy the data out of the buffer we created */ 1483 BYTE __user *ptr = ioc->buf; 1484 for (i = 0; i < sg_used; i++) { 1485 if (copy_to_user 1486 (ptr, buff[i], buff_size[i])) { 1487 cmd_free(host, c, 0); 1488 status = -EFAULT; 1489 goto cleanup1; 1490 } 1491 ptr += buff_size[i]; 1492 } 1493 } 1494 cmd_free(host, c, 0); 1495 status = 0; 1496 cleanup1: 1497 if (buff) { 1498 for (i = 0; i < sg_used; i++) 1499 kfree(buff[i]); 1500 kfree(buff); 1501 } 1502 kfree(buff_size); 1503 kfree(ioc); 1504 return status; 1505 } 1506 1507 /* scsi_cmd_ioctl handles these, below, though some are not */ 1508 /* very meaningful for cciss. SG_IO is the main one people want. */ 1509 1510 case SG_GET_VERSION_NUM: 1511 case SG_SET_TIMEOUT: 1512 case SG_GET_TIMEOUT: 1513 case SG_GET_RESERVED_SIZE: 1514 case SG_SET_RESERVED_SIZE: 1515 case SG_EMULATED_HOST: 1516 case SG_IO: 1517 case SCSI_IOCTL_SEND_COMMAND: 1518 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); 1519 1520 /* scsi_cmd_ioctl would normally handle these, below, but */ 1521 /* they aren't a good fit for cciss, as CD-ROMs are */ 1522 /* not supported, and we don't have any bus/target/lun */ 1523 /* which we present to the kernel. */ 1524 1525 case CDROM_SEND_PACKET: 1526 case CDROMCLOSETRAY: 1527 case CDROMEJECT: 1528 case SCSI_IOCTL_GET_IDLUN: 1529 case SCSI_IOCTL_GET_BUS_NUMBER: 1530 default: 1531 return -ENOTTY; 1532 } 1533} 1534 1535static void cciss_check_queues(ctlr_info_t *h) 1536{ 1537 int start_queue = h->next_to_run; 1538 int i; 1539 1540 /* check to see if we have maxed out the number of commands that can 1541 * be placed on the queue. If so then exit. We do this check here 1542 * in case the interrupt we serviced was from an ioctl and did not 1543 * free any new commands. 1544 */ 1545 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) 1546 return; 1547 1548 /* We have room on the queue for more commands. Now we need to queue 1549 * them up. We will also keep track of the next queue to run so 1550 * that every queue gets a chance to be started first. 1551 */ 1552 for (i = 0; i < h->highest_lun + 1; i++) { 1553 int curr_queue = (start_queue + i) % (h->highest_lun + 1); 1554 /* make sure the disk has been added and the drive is real 1555 * because this can be called from the middle of init_one. 1556 */ 1557 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads)) 1558 continue; 1559 blk_start_queue(h->gendisk[curr_queue]->queue); 1560 1561 /* check to see if we have maxed out the number of commands 1562 * that can be placed on the queue. 1563 */ 1564 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) { 1565 if (curr_queue == start_queue) { 1566 h->next_to_run = 1567 (start_queue + 1) % (h->highest_lun + 1); 1568 break; 1569 } else { 1570 h->next_to_run = curr_queue; 1571 break; 1572 } 1573 } 1574 } 1575} 1576 1577static void cciss_softirq_done(struct request *rq) 1578{ 1579 CommandList_struct *cmd = rq->completion_data; 1580 ctlr_info_t *h = hba[cmd->ctlr]; 1581 unsigned long flags; 1582 u64bit temp64; 1583 int i, ddir; 1584 1585 if (cmd->Request.Type.Direction == XFER_READ) 1586 ddir = PCI_DMA_FROMDEVICE; 1587 else 1588 ddir = PCI_DMA_TODEVICE; 1589 1590 /* command did not need to be retried */ 1591 /* unmap the DMA mapping for all the scatter gather elements */ 1592 for (i = 0; i < cmd->Header.SGList; i++) { 1593 temp64.val32.lower = cmd->SG[i].Addr.lower; 1594 temp64.val32.upper = cmd->SG[i].Addr.upper; 1595 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir); 1596 } 1597 1598#ifdef CCISS_DEBUG 1599 printk("Done with %p\n", rq); 1600#endif /* CCISS_DEBUG */ 1601 1602 /* set the residual count for pc requests */ 1603 if (blk_pc_request(rq)) 1604 rq->resid_len = cmd->err_info->ResidualCnt; 1605 1606 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO); 1607 1608 spin_lock_irqsave(&h->lock, flags); 1609 cmd_free(h, cmd, 1); 1610 cciss_check_queues(h); 1611 spin_unlock_irqrestore(&h->lock, flags); 1612} 1613 1614static void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[], 1615 uint32_t log_unit) 1616{ 1617 log_unit = h->drv[log_unit].LunID & 0x03fff; 1618 memset(&scsi3addr[4], 0, 4); 1619 memcpy(&scsi3addr[0], &log_unit, 4); 1620 scsi3addr[3] |= 0x40; 1621} 1622 1623/* This function gets the SCSI vendor, model, and revision of a logical drive 1624 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if 1625 * they cannot be read. 1626 */ 1627static void cciss_get_device_descr(int ctlr, int logvol, int withirq, 1628 char *vendor, char *model, char *rev) 1629{ 1630 int rc; 1631 InquiryData_struct *inq_buf; 1632 unsigned char scsi3addr[8]; 1633 1634 *vendor = '\0'; 1635 *model = '\0'; 1636 *rev = '\0'; 1637 1638 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1639 if (!inq_buf) 1640 return; 1641 1642 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1643 if (withirq) 1644 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, 1645 sizeof(InquiryData_struct), 0, 1646 scsi3addr, TYPE_CMD); 1647 else 1648 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf, 1649 sizeof(InquiryData_struct), 0, 1650 scsi3addr, TYPE_CMD); 1651 if (rc == IO_OK) { 1652 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN); 1653 vendor[VENDOR_LEN] = '\0'; 1654 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN); 1655 model[MODEL_LEN] = '\0'; 1656 memcpy(rev, &inq_buf->data_byte[32], REV_LEN); 1657 rev[REV_LEN] = '\0'; 1658 } 1659 1660 kfree(inq_buf); 1661 return; 1662} 1663 1664/* This function gets the serial number of a logical drive via 1665 * inquiry page 0x83. Serial no. is 16 bytes. If the serial 1666 * number cannot be had, for whatever reason, 16 bytes of 0xff 1667 * are returned instead. 1668 */ 1669static void cciss_get_serial_no(int ctlr, int logvol, int withirq, 1670 unsigned char *serial_no, int buflen) 1671{ 1672#define PAGE_83_INQ_BYTES 64 1673 int rc; 1674 unsigned char *buf; 1675 unsigned char scsi3addr[8]; 1676 1677 if (buflen > 16) 1678 buflen = 16; 1679 memset(serial_no, 0xff, buflen); 1680 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); 1681 if (!buf) 1682 return; 1683 memset(serial_no, 0, buflen); 1684 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1685 if (withirq) 1686 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf, 1687 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); 1688 else 1689 rc = sendcmd(CISS_INQUIRY, ctlr, buf, 1690 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); 1691 if (rc == IO_OK) 1692 memcpy(serial_no, &buf[8], buflen); 1693 kfree(buf); 1694 return; 1695} 1696 1697/* 1698 * cciss_add_disk sets up the block device queue for a logical drive 1699 */ 1700static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, 1701 int drv_index) 1702{ 1703 disk->queue = blk_init_queue(do_cciss_request, &h->lock); 1704 if (!disk->queue) 1705 goto init_queue_failure; 1706 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index); 1707 disk->major = h->major; 1708 disk->first_minor = drv_index << NWD_SHIFT; 1709 disk->fops = &cciss_fops; 1710 if (h->drv[drv_index].dev == NULL) { 1711 if (cciss_create_ld_sysfs_entry(h, drv_index)) 1712 goto cleanup_queue; 1713 } 1714 disk->private_data = &h->drv[drv_index]; 1715 disk->driverfs_dev = h->drv[drv_index].dev; 1716 1717 /* Set up queue information */ 1718 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); 1719 1720 /* This is a hardware imposed limit. */ 1721 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES); 1722 1723 /* This is a limit in the driver and could be eliminated. */ 1724 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES); 1725 1726 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors); 1727 1728 blk_queue_softirq_done(disk->queue, cciss_softirq_done); 1729 1730 disk->queue->queuedata = h; 1731 1732 blk_queue_logical_block_size(disk->queue, 1733 h->drv[drv_index].block_size); 1734 1735 /* Make sure all queue data is written out before */ 1736 /* setting h->drv[drv_index].queue, as setting this */ 1737 /* allows the interrupt handler to start the queue */ 1738 wmb(); 1739 h->drv[drv_index].queue = disk->queue; 1740 add_disk(disk); 1741 return 0; 1742 1743cleanup_queue: 1744 blk_cleanup_queue(disk->queue); 1745 disk->queue = NULL; 1746init_queue_failure: 1747 return -1; 1748} 1749 1750/* This function will check the usage_count of the drive to be updated/added. 1751 * If the usage_count is zero and it is a heretofore unknown drive, or, 1752 * the drive's capacity, geometry, or serial number has changed, 1753 * then the drive information will be updated and the disk will be 1754 * re-registered with the kernel. If these conditions don't hold, 1755 * then it will be left alone for the next reboot. The exception to this 1756 * is disk 0 which will always be left registered with the kernel since it 1757 * is also the controller node. Any changes to disk 0 will show up on 1758 * the next reboot. 1759 */ 1760static void cciss_update_drive_info(int ctlr, int drv_index, int first_time, 1761 int via_ioctl) 1762{ 1763 ctlr_info_t *h = hba[ctlr]; 1764 struct gendisk *disk; 1765 InquiryData_struct *inq_buff = NULL; 1766 unsigned int block_size; 1767 sector_t total_size; 1768 unsigned long flags = 0; 1769 int ret = 0; 1770 drive_info_struct *drvinfo; 1771 1772 /* Get information about the disk and modify the driver structure */ 1773 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1774 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL); 1775 if (inq_buff == NULL || drvinfo == NULL) 1776 goto mem_msg; 1777 1778 /* testing to see if 16-byte CDBs are already being used */ 1779 if (h->cciss_read == CCISS_READ_16) { 1780 cciss_read_capacity_16(h->ctlr, drv_index, 1, 1781 &total_size, &block_size); 1782 1783 } else { 1784 cciss_read_capacity(ctlr, drv_index, 1, 1785 &total_size, &block_size); 1786 1787 /* if read_capacity returns all F's this volume is >2TB */ 1788 /* in size so we switch to 16-byte CDB's for all */ 1789 /* read/write ops */ 1790 if (total_size == 0xFFFFFFFFULL) { 1791 cciss_read_capacity_16(ctlr, drv_index, 1, 1792 &total_size, &block_size); 1793 h->cciss_read = CCISS_READ_16; 1794 h->cciss_write = CCISS_WRITE_16; 1795 } else { 1796 h->cciss_read = CCISS_READ_10; 1797 h->cciss_write = CCISS_WRITE_10; 1798 } 1799 } 1800 1801 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size, 1802 inq_buff, drvinfo); 1803 drvinfo->block_size = block_size; 1804 drvinfo->nr_blocks = total_size + 1; 1805 1806 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor, 1807 drvinfo->model, drvinfo->rev); 1808 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no, 1809 sizeof(drvinfo->serial_no)); 1810 1811 /* Is it the same disk we already know, and nothing's changed? */ 1812 if (h->drv[drv_index].raid_level != -1 && 1813 ((memcmp(drvinfo->serial_no, 1814 h->drv[drv_index].serial_no, 16) == 0) && 1815 drvinfo->block_size == h->drv[drv_index].block_size && 1816 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks && 1817 drvinfo->heads == h->drv[drv_index].heads && 1818 drvinfo->sectors == h->drv[drv_index].sectors && 1819 drvinfo->cylinders == h->drv[drv_index].cylinders)) 1820 /* The disk is unchanged, nothing to update */ 1821 goto freeret; 1822 1823 /* If we get here it's not the same disk, or something's changed, 1824 * so we need to * deregister it, and re-register it, if it's not 1825 * in use. 1826 * If the disk already exists then deregister it before proceeding 1827 * (unless it's the first disk (for the controller node). 1828 */ 1829 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) { 1830 printk(KERN_WARNING "disk %d has changed.\n", drv_index); 1831 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 1832 h->drv[drv_index].busy_configuring = 1; 1833 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 1834 1835 /* deregister_disk sets h->drv[drv_index].queue = NULL 1836 * which keeps the interrupt handler from starting 1837 * the queue. 1838 */ 1839 ret = deregister_disk(h, drv_index, 0, via_ioctl); 1840 h->drv[drv_index].busy_configuring = 0; 1841 } 1842 1843 /* If the disk is in use return */ 1844 if (ret) 1845 goto freeret; 1846 1847 /* Save the new information from cciss_geometry_inquiry 1848 * and serial number inquiry. 1849 */ 1850 h->drv[drv_index].block_size = drvinfo->block_size; 1851 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks; 1852 h->drv[drv_index].heads = drvinfo->heads; 1853 h->drv[drv_index].sectors = drvinfo->sectors; 1854 h->drv[drv_index].cylinders = drvinfo->cylinders; 1855 h->drv[drv_index].raid_level = drvinfo->raid_level; 1856 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16); 1857 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1); 1858 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1); 1859 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1); 1860 1861 ++h->num_luns; 1862 disk = h->gendisk[drv_index]; 1863 set_capacity(disk, h->drv[drv_index].nr_blocks); 1864 1865 /* If it's not disk 0 (drv_index != 0) 1866 * or if it was disk 0, but there was previously 1867 * no actual corresponding configured logical drive 1868 * (raid_leve == -1) then we want to update the 1869 * logical drive's information. 1870 */ 1871 if (drv_index || first_time) { 1872 if (cciss_add_disk(h, disk, drv_index) != 0) { 1873 cciss_free_gendisk(h, drv_index); 1874 printk(KERN_WARNING "cciss:%d could not update " 1875 "disk %d\n", h->ctlr, drv_index); 1876 --h->num_luns; 1877 } 1878 } 1879 1880freeret: 1881 kfree(inq_buff); 1882 kfree(drvinfo); 1883 return; 1884mem_msg: 1885 printk(KERN_ERR "cciss: out of memory\n"); 1886 goto freeret; 1887} 1888 1889/* This function will find the first index of the controllers drive array 1890 * that has a -1 for the raid_level and will return that index. This is 1891 * where new drives will be added. If the index to be returned is greater 1892 * than the highest_lun index for the controller then highest_lun is set 1893 * to this new index. If there are no available indexes then -1 is returned. 1894 * "controller_node" is used to know if this is a real logical drive, or just 1895 * the controller node, which determines if this counts towards highest_lun. 1896 */ 1897static int cciss_find_free_drive_index(int ctlr, int controller_node) 1898{ 1899 int i; 1900 1901 for (i = 0; i < CISS_MAX_LUN; i++) { 1902 if (hba[ctlr]->drv[i].raid_level == -1) { 1903 if (i > hba[ctlr]->highest_lun) 1904 if (!controller_node) 1905 hba[ctlr]->highest_lun = i; 1906 return i; 1907 } 1908 } 1909 return -1; 1910} 1911 1912static void cciss_free_gendisk(ctlr_info_t *h, int drv_index) 1913{ 1914 put_disk(h->gendisk[drv_index]); 1915 h->gendisk[drv_index] = NULL; 1916} 1917 1918/* cciss_add_gendisk finds a free hba[]->drv structure 1919 * and allocates a gendisk if needed, and sets the lunid 1920 * in the drvinfo structure. It returns the index into 1921 * the ->drv[] array, or -1 if none are free. 1922 * is_controller_node indicates whether highest_lun should 1923 * count this disk, or if it's only being added to provide 1924 * a means to talk to the controller in case no logical 1925 * drives have yet been configured. 1926 */ 1927static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node) 1928{ 1929 int drv_index; 1930 1931 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node); 1932 if (drv_index == -1) 1933 return -1; 1934 1935 /*Check if the gendisk needs to be allocated */ 1936 if (!h->gendisk[drv_index]) { 1937 h->gendisk[drv_index] = 1938 alloc_disk(1 << NWD_SHIFT); 1939 if (!h->gendisk[drv_index]) { 1940 printk(KERN_ERR "cciss%d: could not " 1941 "allocate a new disk %d\n", 1942 h->ctlr, drv_index); 1943 return -1; 1944 } 1945 } 1946 h->drv[drv_index].LunID = lunid; 1947 if (h->drv[drv_index].dev == NULL) { 1948 if (cciss_create_ld_sysfs_entry(h, drv_index)) 1949 goto err_free_disk; 1950 } 1951 /* Don't need to mark this busy because nobody */ 1952 /* else knows about this disk yet to contend */ 1953 /* for access to it. */ 1954 h->drv[drv_index].busy_configuring = 0; 1955 wmb(); 1956 return drv_index; 1957 1958err_free_disk: 1959 cciss_free_gendisk(h, drv_index); 1960 return -1; 1961} 1962 1963/* This is for the special case of a controller which 1964 * has no logical drives. In this case, we still need 1965 * to register a disk so the controller can be accessed 1966 * by the Array Config Utility. 1967 */ 1968static void cciss_add_controller_node(ctlr_info_t *h) 1969{ 1970 struct gendisk *disk; 1971 int drv_index; 1972 1973 if (h->gendisk[0] != NULL) /* already did this? Then bail. */ 1974 return; 1975 1976 drv_index = cciss_add_gendisk(h, 0, 1); 1977 if (drv_index == -1) 1978 goto error; 1979 h->drv[drv_index].block_size = 512; 1980 h->drv[drv_index].nr_blocks = 0; 1981 h->drv[drv_index].heads = 0; 1982 h->drv[drv_index].sectors = 0; 1983 h->drv[drv_index].cylinders = 0; 1984 h->drv[drv_index].raid_level = -1; 1985 memset(h->drv[drv_index].serial_no, 0, 16); 1986 disk = h->gendisk[drv_index]; 1987 if (cciss_add_disk(h, disk, drv_index) == 0) 1988 return; 1989 cciss_free_gendisk(h, drv_index); 1990error: 1991 printk(KERN_WARNING "cciss%d: could not " 1992 "add disk 0.\n", h->ctlr); 1993 return; 1994} 1995 1996/* This function will add and remove logical drives from the Logical 1997 * drive array of the controller and maintain persistency of ordering 1998 * so that mount points are preserved until the next reboot. This allows 1999 * for the removal of logical drives in the middle of the drive array 2000 * without a re-ordering of those drives. 2001 * INPUT 2002 * h = The controller to perform the operations on 2003 */ 2004static int rebuild_lun_table(ctlr_info_t *h, int first_time, 2005 int via_ioctl) 2006{ 2007 int ctlr = h->ctlr; 2008 int num_luns; 2009 ReportLunData_struct *ld_buff = NULL; 2010 int return_code; 2011 int listlength = 0; 2012 int i; 2013 int drv_found; 2014 int drv_index = 0; 2015 __u32 lunid = 0; 2016 unsigned long flags; 2017 2018 if (!capable(CAP_SYS_RAWIO)) 2019 return -EPERM; 2020 2021 /* Set busy_configuring flag for this operation */ 2022 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2023 if (h->busy_configuring) { 2024 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2025 return -EBUSY; 2026 } 2027 h->busy_configuring = 1; 2028 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2029 2030 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); 2031 if (ld_buff == NULL) 2032 goto mem_msg; 2033 2034 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff, 2035 sizeof(ReportLunData_struct), 2036 0, CTLR_LUNID, TYPE_CMD); 2037 2038 if (return_code == IO_OK) 2039 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); 2040 else { /* reading number of logical volumes failed */ 2041 printk(KERN_WARNING "cciss: report logical volume" 2042 " command failed\n"); 2043 listlength = 0; 2044 goto freeret; 2045 } 2046 2047 num_luns = listlength / 8; /* 8 bytes per entry */ 2048 if (num_luns > CISS_MAX_LUN) { 2049 num_luns = CISS_MAX_LUN; 2050 printk(KERN_WARNING "cciss: more luns configured" 2051 " on controller than can be handled by" 2052 " this driver.\n"); 2053 } 2054 2055 if (num_luns == 0) 2056 cciss_add_controller_node(h); 2057 2058 /* Compare controller drive array to driver's drive array 2059 * to see if any drives are missing on the controller due 2060 * to action of Array Config Utility (user deletes drive) 2061 * and deregister logical drives which have disappeared. 2062 */ 2063 for (i = 0; i <= h->highest_lun; i++) { 2064 int j; 2065 drv_found = 0; 2066 2067 /* skip holes in the array from already deleted drives */ 2068 if (h->drv[i].raid_level == -1) 2069 continue; 2070 2071 for (j = 0; j < num_luns; j++) { 2072 memcpy(&lunid, &ld_buff->LUN[j][0], 4); 2073 lunid = le32_to_cpu(lunid); 2074 if (h->drv[i].LunID == lunid) { 2075 drv_found = 1; 2076 break; 2077 } 2078 } 2079 if (!drv_found) { 2080 /* Deregister it from the OS, it's gone. */ 2081 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2082 h->drv[i].busy_configuring = 1; 2083 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2084 return_code = deregister_disk(h, i, 1, via_ioctl); 2085 h->drv[i].busy_configuring = 0; 2086 } 2087 } 2088 2089 /* Compare controller drive array to driver's drive array. 2090 * Check for updates in the drive information and any new drives 2091 * on the controller due to ACU adding logical drives, or changing 2092 * a logical drive's size, etc. Reregister any new/changed drives 2093 */ 2094 for (i = 0; i < num_luns; i++) { 2095 int j; 2096 2097 drv_found = 0; 2098 2099 memcpy(&lunid, &ld_buff->LUN[i][0], 4); 2100 lunid = le32_to_cpu(lunid); 2101 2102 /* Find if the LUN is already in the drive array 2103 * of the driver. If so then update its info 2104 * if not in use. If it does not exist then find 2105 * the first free index and add it. 2106 */ 2107 for (j = 0; j <= h->highest_lun; j++) { 2108 if (h->drv[j].raid_level != -1 && 2109 h->drv[j].LunID == lunid) { 2110 drv_index = j; 2111 drv_found = 1; 2112 break; 2113 } 2114 } 2115 2116 /* check if the drive was found already in the array */ 2117 if (!drv_found) { 2118 drv_index = cciss_add_gendisk(h, lunid, 0); 2119 if (drv_index == -1) 2120 goto freeret; 2121 } 2122 cciss_update_drive_info(ctlr, drv_index, first_time, 2123 via_ioctl); 2124 } /* end for */ 2125 2126freeret: 2127 kfree(ld_buff); 2128 h->busy_configuring = 0; 2129 /* We return -1 here to tell the ACU that we have registered/updated 2130 * all of the drives that we can and to keep it from calling us 2131 * additional times. 2132 */ 2133 return -1; 2134mem_msg: 2135 printk(KERN_ERR "cciss: out of memory\n"); 2136 h->busy_configuring = 0; 2137 goto freeret; 2138} 2139 2140static void cciss_clear_drive_info(drive_info_struct *drive_info) 2141{ 2142 /* zero out the disk size info */ 2143 drive_info->nr_blocks = 0; 2144 drive_info->block_size = 0; 2145 drive_info->heads = 0; 2146 drive_info->sectors = 0; 2147 drive_info->cylinders = 0; 2148 drive_info->raid_level = -1; 2149 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no)); 2150 memset(drive_info->model, 0, sizeof(drive_info->model)); 2151 memset(drive_info->rev, 0, sizeof(drive_info->rev)); 2152 memset(drive_info->vendor, 0, sizeof(drive_info->vendor)); 2153 /* 2154 * don't clear the LUNID though, we need to remember which 2155 * one this one is. 2156 */ 2157} 2158 2159/* This function will deregister the disk and it's queue from the 2160 * kernel. It must be called with the controller lock held and the 2161 * drv structures busy_configuring flag set. It's parameters are: 2162 * 2163 * disk = This is the disk to be deregistered 2164 * drv = This is the drive_info_struct associated with the disk to be 2165 * deregistered. It contains information about the disk used 2166 * by the driver. 2167 * clear_all = This flag determines whether or not the disk information 2168 * is going to be completely cleared out and the highest_lun 2169 * reset. Sometimes we want to clear out information about 2170 * the disk in preparation for re-adding it. In this case 2171 * the highest_lun should be left unchanged and the LunID 2172 * should not be cleared. 2173 * via_ioctl 2174 * This indicates whether we've reached this path via ioctl. 2175 * This affects the maximum usage count allowed for c0d0 to be messed with. 2176 * If this path is reached via ioctl(), then the max_usage_count will 2177 * be 1, as the process calling ioctl() has got to have the device open. 2178 * If we get here via sysfs, then the max usage count will be zero. 2179*/ 2180static int deregister_disk(ctlr_info_t *h, int drv_index, 2181 int clear_all, int via_ioctl) 2182{ 2183 int i; 2184 struct gendisk *disk; 2185 drive_info_struct *drv; 2186 2187 if (!capable(CAP_SYS_RAWIO)) 2188 return -EPERM; 2189 2190 drv = &h->drv[drv_index]; 2191 disk = h->gendisk[drv_index]; 2192 2193 /* make sure logical volume is NOT is use */ 2194 if (clear_all || (h->gendisk[0] == disk)) { 2195 if (drv->usage_count > via_ioctl) 2196 return -EBUSY; 2197 } else if (drv->usage_count > 0) 2198 return -EBUSY; 2199 2200 /* invalidate the devices and deregister the disk. If it is disk 2201 * zero do not deregister it but just zero out it's values. This 2202 * allows us to delete disk zero but keep the controller registered. 2203 */ 2204 if (h->gendisk[0] != disk) { 2205 struct request_queue *q = disk->queue; 2206 if (disk->flags & GENHD_FL_UP) { 2207 cciss_destroy_ld_sysfs_entry(h, drv_index, 0); 2208 del_gendisk(disk); 2209 } 2210 if (q) { 2211 blk_cleanup_queue(q); 2212 /* Set drv->queue to NULL so that we do not try 2213 * to call blk_start_queue on this queue in the 2214 * interrupt handler 2215 */ 2216 drv->queue = NULL; 2217 } 2218 /* If clear_all is set then we are deleting the logical 2219 * drive, not just refreshing its info. For drives 2220 * other than disk 0 we will call put_disk. We do not 2221 * do this for disk 0 as we need it to be able to 2222 * configure the controller. 2223 */ 2224 if (clear_all){ 2225 /* This isn't pretty, but we need to find the 2226 * disk in our array and NULL our the pointer. 2227 * This is so that we will call alloc_disk if 2228 * this index is used again later. 2229 */ 2230 for (i=0; i < CISS_MAX_LUN; i++){ 2231 if (h->gendisk[i] == disk) { 2232 h->gendisk[i] = NULL; 2233 break; 2234 } 2235 } 2236 put_disk(disk); 2237 } 2238 } else { 2239 set_capacity(disk, 0); 2240 } 2241 2242 --h->num_luns; 2243 cciss_clear_drive_info(drv); 2244 2245 if (clear_all) { 2246 /* check to see if it was the last disk */ 2247 if (drv == h->drv + h->highest_lun) { 2248 /* if so, find the new hightest lun */ 2249 int i, newhighest = -1; 2250 for (i = 0; i <= h->highest_lun; i++) { 2251 /* if the disk has size > 0, it is available */ 2252 if (h->drv[i].heads) 2253 newhighest = i; 2254 } 2255 h->highest_lun = newhighest; 2256 } 2257 2258 drv->LunID = 0; 2259 } 2260 return 0; 2261} 2262 2263static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, 2264 size_t size, __u8 page_code, unsigned char *scsi3addr, 2265 int cmd_type) 2266{ 2267 ctlr_info_t *h = hba[ctlr]; 2268 u64bit buff_dma_handle; 2269 int status = IO_OK; 2270 2271 c->cmd_type = CMD_IOCTL_PEND; 2272 c->Header.ReplyQueue = 0; 2273 if (buff != NULL) { 2274 c->Header.SGList = 1; 2275 c->Header.SGTotal = 1; 2276 } else { 2277 c->Header.SGList = 0; 2278 c->Header.SGTotal = 0; 2279 } 2280 c->Header.Tag.lower = c->busaddr; 2281 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); 2282 2283 c->Request.Type.Type = cmd_type; 2284 if (cmd_type == TYPE_CMD) { 2285 switch (cmd) { 2286 case CISS_INQUIRY: 2287 /* are we trying to read a vital product page */ 2288 if (page_code != 0) { 2289 c->Request.CDB[1] = 0x01; 2290 c->Request.CDB[2] = page_code; 2291 } 2292 c->Request.CDBLen = 6; 2293 c->Request.Type.Attribute = ATTR_SIMPLE; 2294 c->Request.Type.Direction = XFER_READ; 2295 c->Request.Timeout = 0; 2296 c->Request.CDB[0] = CISS_INQUIRY; 2297 c->Request.CDB[4] = size & 0xFF; 2298 break; 2299 case CISS_REPORT_LOG: 2300 case CISS_REPORT_PHYS: 2301 /* Talking to controller so It's a physical command 2302 mode = 00 target = 0. Nothing to write. 2303 */ 2304 c->Request.CDBLen = 12; 2305 c->Request.Type.Attribute = ATTR_SIMPLE; 2306 c->Request.Type.Direction = XFER_READ; 2307 c->Request.Timeout = 0; 2308 c->Request.CDB[0] = cmd; 2309 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB 2310 c->Request.CDB[7] = (size >> 16) & 0xFF; 2311 c->Request.CDB[8] = (size >> 8) & 0xFF; 2312 c->Request.CDB[9] = size & 0xFF; 2313 break; 2314 2315 case CCISS_READ_CAPACITY: 2316 c->Request.CDBLen = 10; 2317 c->Request.Type.Attribute = ATTR_SIMPLE; 2318 c->Request.Type.Direction = XFER_READ; 2319 c->Request.Timeout = 0; 2320 c->Request.CDB[0] = cmd; 2321 break; 2322 case CCISS_READ_CAPACITY_16: 2323 c->Request.CDBLen = 16; 2324 c->Request.Type.Attribute = ATTR_SIMPLE; 2325 c->Request.Type.Direction = XFER_READ; 2326 c->Request.Timeout = 0; 2327 c->Request.CDB[0] = cmd; 2328 c->Request.CDB[1] = 0x10; 2329 c->Request.CDB[10] = (size >> 24) & 0xFF; 2330 c->Request.CDB[11] = (size >> 16) & 0xFF; 2331 c->Request.CDB[12] = (size >> 8) & 0xFF; 2332 c->Request.CDB[13] = size & 0xFF; 2333 c->Request.Timeout = 0; 2334 c->Request.CDB[0] = cmd; 2335 break; 2336 case CCISS_CACHE_FLUSH: 2337 c->Request.CDBLen = 12; 2338 c->Request.Type.Attribute = ATTR_SIMPLE; 2339 c->Request.Type.Direction = XFER_WRITE; 2340 c->Request.Timeout = 0; 2341 c->Request.CDB[0] = BMIC_WRITE; 2342 c->Request.CDB[6] = BMIC_CACHE_FLUSH; 2343 break; 2344 case TEST_UNIT_READY: 2345 c->Request.CDBLen = 6; 2346 c->Request.Type.Attribute = ATTR_SIMPLE; 2347 c->Request.Type.Direction = XFER_NONE; 2348 c->Request.Timeout = 0; 2349 break; 2350 default: 2351 printk(KERN_WARNING 2352 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd); 2353 return IO_ERROR; 2354 } 2355 } else if (cmd_type == TYPE_MSG) { 2356 switch (cmd) { 2357 case 0: /* ABORT message */ 2358 c->Request.CDBLen = 12; 2359 c->Request.Type.Attribute = ATTR_SIMPLE; 2360 c->Request.Type.Direction = XFER_WRITE; 2361 c->Request.Timeout = 0; 2362 c->Request.CDB[0] = cmd; /* abort */ 2363 c->Request.CDB[1] = 0; /* abort a command */ 2364 /* buff contains the tag of the command to abort */ 2365 memcpy(&c->Request.CDB[4], buff, 8); 2366 break; 2367 case 1: /* RESET message */ 2368 c->Request.CDBLen = 16; 2369 c->Request.Type.Attribute = ATTR_SIMPLE; 2370 c->Request.Type.Direction = XFER_NONE; 2371 c->Request.Timeout = 0; 2372 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); 2373 c->Request.CDB[0] = cmd; /* reset */ 2374 c->Request.CDB[1] = 0x03; /* reset a target */ 2375 break; 2376 case 3: /* No-Op message */ 2377 c->Request.CDBLen = 1; 2378 c->Request.Type.Attribute = ATTR_SIMPLE; 2379 c->Request.Type.Direction = XFER_WRITE; 2380 c->Request.Timeout = 0; 2381 c->Request.CDB[0] = cmd; 2382 break; 2383 default: 2384 printk(KERN_WARNING 2385 "cciss%d: unknown message type %d\n", ctlr, cmd); 2386 return IO_ERROR; 2387 } 2388 } else { 2389 printk(KERN_WARNING 2390 "cciss%d: unknown command type %d\n", ctlr, cmd_type); 2391 return IO_ERROR; 2392 } 2393 /* Fill in the scatter gather information */ 2394 if (size > 0) { 2395 buff_dma_handle.val = (__u64) pci_map_single(h->pdev, 2396 buff, size, 2397 PCI_DMA_BIDIRECTIONAL); 2398 c->SG[0].Addr.lower = buff_dma_handle.val32.lower; 2399 c->SG[0].Addr.upper = buff_dma_handle.val32.upper; 2400 c->SG[0].Len = size; 2401 c->SG[0].Ext = 0; /* we are not chaining */ 2402 } 2403 return status; 2404} 2405 2406static int check_target_status(ctlr_info_t *h, CommandList_struct *c) 2407{ 2408 switch (c->err_info->ScsiStatus) { 2409 case SAM_STAT_GOOD: 2410 return IO_OK; 2411 case SAM_STAT_CHECK_CONDITION: 2412 switch (0xf & c->err_info->SenseInfo[2]) { 2413 case 0: return IO_OK; /* no sense */ 2414 case 1: return IO_OK; /* recovered error */ 2415 default: 2416 printk(KERN_WARNING "cciss%d: cmd 0x%02x " 2417 "check condition, sense key = 0x%02x\n", 2418 h->ctlr, c->Request.CDB[0], 2419 c->err_info->SenseInfo[2]); 2420 } 2421 break; 2422 default: 2423 printk(KERN_WARNING "cciss%d: cmd 0x%02x" 2424 "scsi status = 0x%02x\n", h->ctlr, 2425 c->Request.CDB[0], c->err_info->ScsiStatus); 2426 break; 2427 } 2428 return IO_ERROR; 2429} 2430 2431static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c) 2432{ 2433 int return_status = IO_OK; 2434 2435 if (c->err_info->CommandStatus == CMD_SUCCESS) 2436 return IO_OK; 2437 2438 switch (c->err_info->CommandStatus) { 2439 case CMD_TARGET_STATUS: 2440 return_status = check_target_status(h, c); 2441 break; 2442 case CMD_DATA_UNDERRUN: 2443 case CMD_DATA_OVERRUN: 2444 /* expected for inquiry and report lun commands */ 2445 break; 2446 case CMD_INVALID: 2447 printk(KERN_WARNING "cciss: cmd 0x%02x is " 2448 "reported invalid\n", c->Request.CDB[0]); 2449 return_status = IO_ERROR; 2450 break; 2451 case CMD_PROTOCOL_ERR: 2452 printk(KERN_WARNING "cciss: cmd 0x%02x has " 2453 "protocol error \n", c->Request.CDB[0]); 2454 return_status = IO_ERROR; 2455 break; 2456 case CMD_HARDWARE_ERR: 2457 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2458 " hardware error\n", c->Request.CDB[0]); 2459 return_status = IO_ERROR; 2460 break; 2461 case CMD_CONNECTION_LOST: 2462 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2463 "connection lost\n", c->Request.CDB[0]); 2464 return_status = IO_ERROR; 2465 break; 2466 case CMD_ABORTED: 2467 printk(KERN_WARNING "cciss: cmd 0x%02x was " 2468 "aborted\n", c->Request.CDB[0]); 2469 return_status = IO_ERROR; 2470 break; 2471 case CMD_ABORT_FAILED: 2472 printk(KERN_WARNING "cciss: cmd 0x%02x reports " 2473 "abort failed\n", c->Request.CDB[0]); 2474 return_status = IO_ERROR; 2475 break; 2476 case CMD_UNSOLICITED_ABORT: 2477 printk(KERN_WARNING 2478 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr, 2479 c->Request.CDB[0]); 2480 return_status = IO_NEEDS_RETRY; 2481 break; 2482 default: 2483 printk(KERN_WARNING "cciss: cmd 0x%02x returned " 2484 "unknown status %x\n", c->Request.CDB[0], 2485 c->err_info->CommandStatus); 2486 return_status = IO_ERROR; 2487 } 2488 return return_status; 2489} 2490 2491static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 2492 int attempt_retry) 2493{ 2494 DECLARE_COMPLETION_ONSTACK(wait); 2495 u64bit buff_dma_handle; 2496 unsigned long flags; 2497 int return_status = IO_OK; 2498 2499resend_cmd2: 2500 c->waiting = &wait; 2501 /* Put the request on the tail of the queue and send it */ 2502 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2503 addQ(&h->reqQ, c); 2504 h->Qdepth++; 2505 start_io(h); 2506 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2507 2508 wait_for_completion(&wait); 2509 2510 if (c->err_info->CommandStatus == 0 || !attempt_retry) 2511 goto command_done; 2512 2513 return_status = process_sendcmd_error(h, c); 2514 2515 if (return_status == IO_NEEDS_RETRY && 2516 c->retry_count < MAX_CMD_RETRIES) { 2517 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr, 2518 c->Request.CDB[0]); 2519 c->retry_count++; 2520 /* erase the old error information */ 2521 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 2522 return_status = IO_OK; 2523 INIT_COMPLETION(wait); 2524 goto resend_cmd2; 2525 } 2526 2527command_done: 2528 /* unlock the buffers from DMA */ 2529 buff_dma_handle.val32.lower = c->SG[0].Addr.lower; 2530 buff_dma_handle.val32.upper = c->SG[0].Addr.upper; 2531 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, 2532 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); 2533 return return_status; 2534} 2535 2536static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 2537 __u8 page_code, unsigned char scsi3addr[], 2538 int cmd_type) 2539{ 2540 ctlr_info_t *h = hba[ctlr]; 2541 CommandList_struct *c; 2542 int return_status; 2543 2544 c = cmd_alloc(h, 0); 2545 if (!c) 2546 return -ENOMEM; 2547 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code, 2548 scsi3addr, cmd_type); 2549 if (return_status == IO_OK) 2550 return_status = sendcmd_withirq_core(h, c, 1); 2551 2552 cmd_free(h, c, 0); 2553 return return_status; 2554} 2555 2556static void cciss_geometry_inquiry(int ctlr, int logvol, 2557 int withirq, sector_t total_size, 2558 unsigned int block_size, 2559 InquiryData_struct *inq_buff, 2560 drive_info_struct *drv) 2561{ 2562 int return_code; 2563 unsigned long t; 2564 unsigned char scsi3addr[8]; 2565 2566 memset(inq_buff, 0, sizeof(InquiryData_struct)); 2567 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2568 if (withirq) 2569 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, 2570 inq_buff, sizeof(*inq_buff), 2571 0xC1, scsi3addr, TYPE_CMD); 2572 else 2573 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff, 2574 sizeof(*inq_buff), 0xC1, scsi3addr, 2575 TYPE_CMD); 2576 if (return_code == IO_OK) { 2577 if (inq_buff->data_byte[8] == 0xFF) { 2578 printk(KERN_WARNING 2579 "cciss: reading geometry failed, volume " 2580 "does not support reading geometry\n"); 2581 drv->heads = 255; 2582 drv->sectors = 32; // Sectors per track 2583 drv->cylinders = total_size + 1; 2584 drv->raid_level = RAID_UNKNOWN; 2585 } else { 2586 drv->heads = inq_buff->data_byte[6]; 2587 drv->sectors = inq_buff->data_byte[7]; 2588 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8; 2589 drv->cylinders += inq_buff->data_byte[5]; 2590 drv->raid_level = inq_buff->data_byte[8]; 2591 } 2592 drv->block_size = block_size; 2593 drv->nr_blocks = total_size + 1; 2594 t = drv->heads * drv->sectors; 2595 if (t > 1) { 2596 sector_t real_size = total_size + 1; 2597 unsigned long rem = sector_div(real_size, t); 2598 if (rem) 2599 real_size++; 2600 drv->cylinders = real_size; 2601 } 2602 } else { /* Get geometry failed */ 2603 printk(KERN_WARNING "cciss: reading geometry failed\n"); 2604 } 2605} 2606 2607static void 2608cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size, 2609 unsigned int *block_size) 2610{ 2611 ReadCapdata_struct *buf; 2612 int return_code; 2613 unsigned char scsi3addr[8]; 2614 2615 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL); 2616 if (!buf) { 2617 printk(KERN_WARNING "cciss: out of memory\n"); 2618 return; 2619 } 2620 2621 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2622 if (withirq) 2623 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, 2624 ctlr, buf, sizeof(ReadCapdata_struct), 2625 0, scsi3addr, TYPE_CMD); 2626 else 2627 return_code = sendcmd(CCISS_READ_CAPACITY, 2628 ctlr, buf, sizeof(ReadCapdata_struct), 2629 0, scsi3addr, TYPE_CMD); 2630 if (return_code == IO_OK) { 2631 *total_size = be32_to_cpu(*(__be32 *) buf->total_size); 2632 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2633 } else { /* read capacity command failed */ 2634 printk(KERN_WARNING "cciss: read capacity failed\n"); 2635 *total_size = 0; 2636 *block_size = BLOCK_SIZE; 2637 } 2638 kfree(buf); 2639} 2640 2641static void 2642cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size) 2643{ 2644 ReadCapdata_struct_16 *buf; 2645 int return_code; 2646 unsigned char scsi3addr[8]; 2647 2648 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL); 2649 if (!buf) { 2650 printk(KERN_WARNING "cciss: out of memory\n"); 2651 return; 2652 } 2653 2654 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2655 if (withirq) { 2656 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16, 2657 ctlr, buf, sizeof(ReadCapdata_struct_16), 2658 0, scsi3addr, TYPE_CMD); 2659 } 2660 else { 2661 return_code = sendcmd(CCISS_READ_CAPACITY_16, 2662 ctlr, buf, sizeof(ReadCapdata_struct_16), 2663 0, scsi3addr, TYPE_CMD); 2664 } 2665 if (return_code == IO_OK) { 2666 *total_size = be64_to_cpu(*(__be64 *) buf->total_size); 2667 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2668 } else { /* read capacity command failed */ 2669 printk(KERN_WARNING "cciss: read capacity failed\n"); 2670 *total_size = 0; 2671 *block_size = BLOCK_SIZE; 2672 } 2673 printk(KERN_INFO " blocks= %llu block_size= %d\n", 2674 (unsigned long long)*total_size+1, *block_size); 2675 kfree(buf); 2676} 2677 2678static int cciss_revalidate(struct gendisk *disk) 2679{ 2680 ctlr_info_t *h = get_host(disk); 2681 drive_info_struct *drv = get_drv(disk); 2682 int logvol; 2683 int FOUND = 0; 2684 unsigned int block_size; 2685 sector_t total_size; 2686 InquiryData_struct *inq_buff = NULL; 2687 2688 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { 2689 if (h->drv[logvol].LunID == drv->LunID) { 2690 FOUND = 1; 2691 break; 2692 } 2693 } 2694 2695 if (!FOUND) 2696 return 1; 2697 2698 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 2699 if (inq_buff == NULL) { 2700 printk(KERN_WARNING "cciss: out of memory\n"); 2701 return 1; 2702 } 2703 if (h->cciss_read == CCISS_READ_10) { 2704 cciss_read_capacity(h->ctlr, logvol, 1, 2705 &total_size, &block_size); 2706 } else { 2707 cciss_read_capacity_16(h->ctlr, logvol, 1, 2708 &total_size, &block_size); 2709 } 2710 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size, 2711 inq_buff, drv); 2712 2713 blk_queue_logical_block_size(drv->queue, drv->block_size); 2714 set_capacity(disk, drv->nr_blocks); 2715 2716 kfree(inq_buff); 2717 return 0; 2718} 2719 2720/* 2721 * Wait polling for a command to complete. 2722 * The memory mapped FIFO is polled for the completion. 2723 * Used only at init time, interrupts from the HBA are disabled. 2724 */ 2725static unsigned long pollcomplete(int ctlr) 2726{ 2727 unsigned long done; 2728 int i; 2729 2730 /* Wait (up to 20 seconds) for a command to complete */ 2731 2732 for (i = 20 * HZ; i > 0; i--) { 2733 done = hba[ctlr]->access.command_completed(hba[ctlr]); 2734 if (done == FIFO_EMPTY) 2735 schedule_timeout_uninterruptible(1); 2736 else 2737 return done; 2738 } 2739 /* Invalid address to tell caller we ran out of time */ 2740 return 1; 2741} 2742 2743/* Send command c to controller h and poll for it to complete. 2744 * Turns interrupts off on the board. Used at driver init time 2745 * and during SCSI error recovery. 2746 */ 2747static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c) 2748{ 2749 int i; 2750 unsigned long complete; 2751 int status = IO_ERROR; 2752 u64bit buff_dma_handle; 2753 2754resend_cmd1: 2755 2756 /* Disable interrupt on the board. */ 2757 h->access.set_intr_mask(h, CCISS_INTR_OFF); 2758 2759 /* Make sure there is room in the command FIFO */ 2760 /* Actually it should be completely empty at this time */ 2761 /* unless we are in here doing error handling for the scsi */ 2762 /* tape side of the driver. */ 2763 for (i = 200000; i > 0; i--) { 2764 /* if fifo isn't full go */ 2765 if (!(h->access.fifo_full(h))) 2766 break; 2767 udelay(10); 2768 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full," 2769 " waiting!\n", h->ctlr); 2770 } 2771 h->access.submit_command(h, c); /* Send the cmd */ 2772 do { 2773 complete = pollcomplete(h->ctlr); 2774 2775#ifdef CCISS_DEBUG 2776 printk(KERN_DEBUG "cciss: command completed\n"); 2777#endif /* CCISS_DEBUG */ 2778 2779 if (complete == 1) { 2780 printk(KERN_WARNING 2781 "cciss cciss%d: SendCmd Timeout out, " 2782 "No command list address returned!\n", h->ctlr); 2783 status = IO_ERROR; 2784 break; 2785 } 2786 2787 /* Make sure it's the command we're expecting. */ 2788 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) { 2789 printk(KERN_WARNING "cciss%d: Unexpected command " 2790 "completion.\n", h->ctlr); 2791 continue; 2792 } 2793 2794 /* It is our command. If no error, we're done. */ 2795 if (!(complete & CISS_ERROR_BIT)) { 2796 status = IO_OK; 2797 break; 2798 } 2799 2800 /* There is an error... */ 2801 2802 /* if data overrun or underun on Report command ignore it */ 2803 if (((c->Request.CDB[0] == CISS_REPORT_LOG) || 2804 (c->Request.CDB[0] == CISS_REPORT_PHYS) || 2805 (c->Request.CDB[0] == CISS_INQUIRY)) && 2806 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) || 2807 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) { 2808 complete = c->busaddr; 2809 status = IO_OK; 2810 break; 2811 } 2812 2813 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) { 2814 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n", 2815 h->ctlr, c); 2816 if (c->retry_count < MAX_CMD_RETRIES) { 2817 printk(KERN_WARNING "cciss%d: retrying %p\n", 2818 h->ctlr, c); 2819 c->retry_count++; 2820 /* erase the old error information */ 2821 memset(c->err_info, 0, sizeof(c->err_info)); 2822 goto resend_cmd1; 2823 } 2824 printk(KERN_WARNING "cciss%d: retried %p too many " 2825 "times\n", h->ctlr, c); 2826 status = IO_ERROR; 2827 break; 2828 } 2829 2830 if (c->err_info->CommandStatus == CMD_UNABORTABLE) { 2831 printk(KERN_WARNING "cciss%d: command could not be " 2832 "aborted.\n", h->ctlr); 2833 status = IO_ERROR; 2834 break; 2835 } 2836 2837 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) { 2838 status = check_target_status(h, c); 2839 break; 2840 } 2841 2842 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr); 2843 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n", 2844 c->Request.CDB[0], c->err_info->CommandStatus); 2845 status = IO_ERROR; 2846 break; 2847 2848 } while (1); 2849 2850 /* unlock the data buffer from DMA */ 2851 buff_dma_handle.val32.lower = c->SG[0].Addr.lower; 2852 buff_dma_handle.val32.upper = c->SG[0].Addr.upper; 2853 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, 2854 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); 2855 return status; 2856} 2857 2858/* 2859 * Send a command to the controller, and wait for it to complete. 2860 * Used at init time, and during SCSI error recovery. 2861 */ 2862static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, 2863 __u8 page_code, unsigned char *scsi3addr, int cmd_type) 2864{ 2865 CommandList_struct *c; 2866 int status; 2867 2868 c = cmd_alloc(hba[ctlr], 1); 2869 if (!c) { 2870 printk(KERN_WARNING "cciss: unable to get memory"); 2871 return IO_ERROR; 2872 } 2873 status = fill_cmd(c, cmd, ctlr, buff, size, page_code, 2874 scsi3addr, cmd_type); 2875 if (status == IO_OK) 2876 status = sendcmd_core(hba[ctlr], c); 2877 cmd_free(hba[ctlr], c, 1); 2878 return status; 2879} 2880 2881/* 2882 * Map (physical) PCI mem into (virtual) kernel space 2883 */ 2884static void __iomem *remap_pci_mem(ulong base, ulong size) 2885{ 2886 ulong page_base = ((ulong) base) & PAGE_MASK; 2887 ulong page_offs = ((ulong) base) - page_base; 2888 void __iomem *page_remapped = ioremap(page_base, page_offs + size); 2889 2890 return page_remapped ? (page_remapped + page_offs) : NULL; 2891} 2892 2893/* 2894 * Takes jobs of the Q and sends them to the hardware, then puts it on 2895 * the Q to wait for completion. 2896 */ 2897static void start_io(ctlr_info_t *h) 2898{ 2899 CommandList_struct *c; 2900 2901 while (!hlist_empty(&h->reqQ)) { 2902 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 2903 /* can't do anything if fifo is full */ 2904 if ((h->access.fifo_full(h))) { 2905 printk(KERN_WARNING "cciss: fifo full\n"); 2906 break; 2907 } 2908 2909 /* Get the first entry from the Request Q */ 2910 removeQ(c); 2911 h->Qdepth--; 2912 2913 /* Tell the controller execute command */ 2914 h->access.submit_command(h, c); 2915 2916 /* Put job onto the completed Q */ 2917 addQ(&h->cmpQ, c); 2918 } 2919} 2920 2921/* Assumes that CCISS_LOCK(h->ctlr) is held. */ 2922/* Zeros out the error record and then resends the command back */ 2923/* to the controller */ 2924static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c) 2925{ 2926 /* erase the old error information */ 2927 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 2928 2929 /* add it to software queue and then send it to the controller */ 2930 addQ(&h->reqQ, c); 2931 h->Qdepth++; 2932 if (h->Qdepth > h->maxQsinceinit) 2933 h->maxQsinceinit = h->Qdepth; 2934 2935 start_io(h); 2936} 2937 2938static inline unsigned int make_status_bytes(unsigned int scsi_status_byte, 2939 unsigned int msg_byte, unsigned int host_byte, 2940 unsigned int driver_byte) 2941{ 2942 /* inverse of macros in scsi.h */ 2943 return (scsi_status_byte & 0xff) | 2944 ((msg_byte & 0xff) << 8) | 2945 ((host_byte & 0xff) << 16) | 2946 ((driver_byte & 0xff) << 24); 2947} 2948 2949static inline int evaluate_target_status(ctlr_info_t *h, 2950 CommandList_struct *cmd, int *retry_cmd) 2951{ 2952 unsigned char sense_key; 2953 unsigned char status_byte, msg_byte, host_byte, driver_byte; 2954 int error_value; 2955 2956 *retry_cmd = 0; 2957 /* If we get in here, it means we got "target status", that is, scsi status */ 2958 status_byte = cmd->err_info->ScsiStatus; 2959 driver_byte = DRIVER_OK; 2960 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */ 2961 2962 if (blk_pc_request(cmd->rq)) 2963 host_byte = DID_PASSTHROUGH; 2964 else 2965 host_byte = DID_OK; 2966 2967 error_value = make_status_bytes(status_byte, msg_byte, 2968 host_byte, driver_byte); 2969 2970 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) { 2971 if (!blk_pc_request(cmd->rq)) 2972 printk(KERN_WARNING "cciss: cmd %p " 2973 "has SCSI Status 0x%x\n", 2974 cmd, cmd->err_info->ScsiStatus); 2975 return error_value; 2976 } 2977 2978 /* check the sense key */ 2979 sense_key = 0xf & cmd->err_info->SenseInfo[2]; 2980 /* no status or recovered error */ 2981 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq)) 2982 error_value = 0; 2983 2984 if (check_for_unit_attention(h, cmd)) { 2985 *retry_cmd = !blk_pc_request(cmd->rq); 2986 return 0; 2987 } 2988 2989 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */ 2990 if (error_value != 0) 2991 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION" 2992 " sense key = 0x%x\n", cmd, sense_key); 2993 return error_value; 2994 } 2995 2996 /* SG_IO or similar, copy sense data back */ 2997 if (cmd->rq->sense) { 2998 if (cmd->rq->sense_len > cmd->err_info->SenseLen) 2999 cmd->rq->sense_len = cmd->err_info->SenseLen; 3000 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo, 3001 cmd->rq->sense_len); 3002 } else 3003 cmd->rq->sense_len = 0; 3004 3005 return error_value; 3006} 3007 3008/* checks the status of the job and calls complete buffers to mark all 3009 * buffers for the completed job. Note that this function does not need 3010 * to hold the hba/queue lock. 3011 */ 3012static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd, 3013 int timeout) 3014{ 3015 int retry_cmd = 0; 3016 struct request *rq = cmd->rq; 3017 3018 rq->errors = 0; 3019 3020 if (timeout) 3021 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT); 3022 3023 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */ 3024 goto after_error_processing; 3025 3026 switch (cmd->err_info->CommandStatus) { 3027 case CMD_TARGET_STATUS: 3028 rq->errors = evaluate_target_status(h, cmd, &retry_cmd); 3029 break; 3030 case CMD_DATA_UNDERRUN: 3031 if (blk_fs_request(cmd->rq)) { 3032 printk(KERN_WARNING "cciss: cmd %p has" 3033 " completed with data underrun " 3034 "reported\n", cmd); 3035 cmd->rq->resid_len = cmd->err_info->ResidualCnt; 3036 } 3037 break; 3038 case CMD_DATA_OVERRUN: 3039 if (blk_fs_request(cmd->rq)) 3040 printk(KERN_WARNING "cciss: cmd %p has" 3041 " completed with data overrun " 3042 "reported\n", cmd); 3043 break; 3044 case CMD_INVALID: 3045 printk(KERN_WARNING "cciss: cmd %p is " 3046 "reported invalid\n", cmd); 3047 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3048 cmd->err_info->CommandStatus, DRIVER_OK, 3049 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3050 break; 3051 case CMD_PROTOCOL_ERR: 3052 printk(KERN_WARNING "cciss: cmd %p has " 3053 "protocol error \n", cmd); 3054 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3055 cmd->err_info->CommandStatus, DRIVER_OK, 3056 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3057 break; 3058 case CMD_HARDWARE_ERR: 3059 printk(KERN_WARNING "cciss: cmd %p had " 3060 " hardware error\n", cmd); 3061 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3062 cmd->err_info->CommandStatus, DRIVER_OK, 3063 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3064 break; 3065 case CMD_CONNECTION_LOST: 3066 printk(KERN_WARNING "cciss: cmd %p had " 3067 "connection lost\n", cmd); 3068 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3069 cmd->err_info->CommandStatus, DRIVER_OK, 3070 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3071 break; 3072 case CMD_ABORTED: 3073 printk(KERN_WARNING "cciss: cmd %p was " 3074 "aborted\n", cmd); 3075 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3076 cmd->err_info->CommandStatus, DRIVER_OK, 3077 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); 3078 break; 3079 case CMD_ABORT_FAILED: 3080 printk(KERN_WARNING "cciss: cmd %p reports " 3081 "abort failed\n", cmd); 3082 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3083 cmd->err_info->CommandStatus, DRIVER_OK, 3084 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3085 break; 3086 case CMD_UNSOLICITED_ABORT: 3087 printk(KERN_WARNING "cciss%d: unsolicited " 3088 "abort %p\n", h->ctlr, cmd); 3089 if (cmd->retry_count < MAX_CMD_RETRIES) { 3090 retry_cmd = 1; 3091 printk(KERN_WARNING 3092 "cciss%d: retrying %p\n", h->ctlr, cmd); 3093 cmd->retry_count++; 3094 } else 3095 printk(KERN_WARNING 3096 "cciss%d: %p retried too " 3097 "many times\n", h->ctlr, cmd); 3098 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3099 cmd->err_info->CommandStatus, DRIVER_OK, 3100 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); 3101 break; 3102 case CMD_TIMEOUT: 3103 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd); 3104 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3105 cmd->err_info->CommandStatus, DRIVER_OK, 3106 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3107 break; 3108 default: 3109 printk(KERN_WARNING "cciss: cmd %p returned " 3110 "unknown status %x\n", cmd, 3111 cmd->err_info->CommandStatus); 3112 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3113 cmd->err_info->CommandStatus, DRIVER_OK, 3114 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3115 } 3116 3117after_error_processing: 3118 3119 /* We need to return this command */ 3120 if (retry_cmd) { 3121 resend_cciss_cmd(h, cmd); 3122 return; 3123 } 3124 cmd->rq->completion_data = cmd; 3125 blk_complete_request(cmd->rq); 3126} 3127 3128/* 3129 * Get a request and submit it to the controller. 3130 */ 3131static void do_cciss_request(struct request_queue *q) 3132{ 3133 ctlr_info_t *h = q->queuedata; 3134 CommandList_struct *c; 3135 sector_t start_blk; 3136 int seg; 3137 struct request *creq; 3138 u64bit temp64; 3139 struct scatterlist tmp_sg[MAXSGENTRIES]; 3140 drive_info_struct *drv; 3141 int i, dir; 3142 3143 /* We call start_io here in case there is a command waiting on the 3144 * queue that has not been sent. 3145 */ 3146 if (blk_queue_plugged(q)) 3147 goto startio; 3148 3149 queue: 3150 creq = blk_peek_request(q); 3151 if (!creq) 3152 goto startio; 3153 3154 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES); 3155 3156 if ((c = cmd_alloc(h, 1)) == NULL) 3157 goto full; 3158 3159 blk_start_request(creq); 3160 3161 spin_unlock_irq(q->queue_lock); 3162 3163 c->cmd_type = CMD_RWREQ; 3164 c->rq = creq; 3165 3166 /* fill in the request */ 3167 drv = creq->rq_disk->private_data; 3168 c->Header.ReplyQueue = 0; // unused in simple mode 3169 /* got command from pool, so use the command block index instead */ 3170 /* for direct lookups. */ 3171 /* The first 2 bits are reserved for controller error reporting. */ 3172 c->Header.Tag.lower = (c->cmdindex << 3); 3173 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */ 3174 c->Header.LUN.LogDev.VolId = drv->LunID; 3175 c->Header.LUN.LogDev.Mode = 1; 3176 c->Request.CDBLen = 10; // 12 byte commands not in FW yet; 3177 c->Request.Type.Type = TYPE_CMD; // It is a command. 3178 c->Request.Type.Attribute = ATTR_SIMPLE; 3179 c->Request.Type.Direction = 3180 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE; 3181 c->Request.Timeout = 0; // Don't time out 3182 c->Request.CDB[0] = 3183 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write; 3184 start_blk = blk_rq_pos(creq); 3185#ifdef CCISS_DEBUG 3186 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", 3187 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq)); 3188#endif /* CCISS_DEBUG */ 3189 3190 sg_init_table(tmp_sg, MAXSGENTRIES); 3191 seg = blk_rq_map_sg(q, creq, tmp_sg); 3192 3193 /* get the DMA records for the setup */ 3194 if (c->Request.Type.Direction == XFER_READ) 3195 dir = PCI_DMA_FROMDEVICE; 3196 else 3197 dir = PCI_DMA_TODEVICE; 3198 3199 for (i = 0; i < seg; i++) { 3200 c->SG[i].Len = tmp_sg[i].length; 3201 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]), 3202 tmp_sg[i].offset, 3203 tmp_sg[i].length, dir); 3204 c->SG[i].Addr.lower = temp64.val32.lower; 3205 c->SG[i].Addr.upper = temp64.val32.upper; 3206 c->SG[i].Ext = 0; // we are not chaining 3207 } 3208 /* track how many SG entries we are using */ 3209 if (seg > h->maxSG) 3210 h->maxSG = seg; 3211 3212#ifdef CCISS_DEBUG 3213 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n", 3214 blk_rq_sectors(creq), seg); 3215#endif /* CCISS_DEBUG */ 3216 3217 c->Header.SGList = c->Header.SGTotal = seg; 3218 if (likely(blk_fs_request(creq))) { 3219 if(h->cciss_read == CCISS_READ_10) { 3220 c->Request.CDB[1] = 0; 3221 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB 3222 c->Request.CDB[3] = (start_blk >> 16) & 0xff; 3223 c->Request.CDB[4] = (start_blk >> 8) & 0xff; 3224 c->Request.CDB[5] = start_blk & 0xff; 3225 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB 3226 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff; 3227 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff; 3228 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0; 3229 } else { 3230 u32 upper32 = upper_32_bits(start_blk); 3231 3232 c->Request.CDBLen = 16; 3233 c->Request.CDB[1]= 0; 3234 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB 3235 c->Request.CDB[3]= (upper32 >> 16) & 0xff; 3236 c->Request.CDB[4]= (upper32 >> 8) & 0xff; 3237 c->Request.CDB[5]= upper32 & 0xff; 3238 c->Request.CDB[6]= (start_blk >> 24) & 0xff; 3239 c->Request.CDB[7]= (start_blk >> 16) & 0xff; 3240 c->Request.CDB[8]= (start_blk >> 8) & 0xff; 3241 c->Request.CDB[9]= start_blk & 0xff; 3242 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff; 3243 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff; 3244 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff; 3245 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff; 3246 c->Request.CDB[14] = c->Request.CDB[15] = 0; 3247 } 3248 } else if (blk_pc_request(creq)) { 3249 c->Request.CDBLen = creq->cmd_len; 3250 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB); 3251 } else { 3252 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type); 3253 BUG(); 3254 } 3255 3256 spin_lock_irq(q->queue_lock); 3257 3258 addQ(&h->reqQ, c); 3259 h->Qdepth++; 3260 if (h->Qdepth > h->maxQsinceinit) 3261 h->maxQsinceinit = h->Qdepth; 3262 3263 goto queue; 3264full: 3265 blk_stop_queue(q); 3266startio: 3267 /* We will already have the driver lock here so not need 3268 * to lock it. 3269 */ 3270 start_io(h); 3271} 3272 3273static inline unsigned long get_next_completion(ctlr_info_t *h) 3274{ 3275 return h->access.command_completed(h); 3276} 3277 3278static inline int interrupt_pending(ctlr_info_t *h) 3279{ 3280 return h->access.intr_pending(h); 3281} 3282 3283static inline long interrupt_not_for_us(ctlr_info_t *h) 3284{ 3285 return (((h->access.intr_pending(h) == 0) || 3286 (h->interrupts_enabled == 0))); 3287} 3288 3289static irqreturn_t do_cciss_intr(int irq, void *dev_id) 3290{ 3291 ctlr_info_t *h = dev_id; 3292 CommandList_struct *c; 3293 unsigned long flags; 3294 __u32 a, a1, a2; 3295 3296 if (interrupt_not_for_us(h)) 3297 return IRQ_NONE; 3298 /* 3299 * If there are completed commands in the completion queue, 3300 * we had better do something about it. 3301 */ 3302 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 3303 while (interrupt_pending(h)) { 3304 while ((a = get_next_completion(h)) != FIFO_EMPTY) { 3305 a1 = a; 3306 if ((a & 0x04)) { 3307 a2 = (a >> 3); 3308 if (a2 >= h->nr_cmds) { 3309 printk(KERN_WARNING 3310 "cciss: controller cciss%d failed, stopping.\n", 3311 h->ctlr); 3312 fail_all_cmds(h->ctlr); 3313 return IRQ_HANDLED; 3314 } 3315 3316 c = h->cmd_pool + a2; 3317 a = c->busaddr; 3318 3319 } else { 3320 struct hlist_node *tmp; 3321 3322 a &= ~3; 3323 c = NULL; 3324 hlist_for_each_entry(c, tmp, &h->cmpQ, list) { 3325 if (c->busaddr == a) 3326 break; 3327 } 3328 } 3329 /* 3330 * If we've found the command, take it off the 3331 * completion Q and free it 3332 */ 3333 if (c && c->busaddr == a) { 3334 removeQ(c); 3335 if (c->cmd_type == CMD_RWREQ) { 3336 complete_command(h, c, 0); 3337 } else if (c->cmd_type == CMD_IOCTL_PEND) { 3338 complete(c->waiting); 3339 } 3340# ifdef CONFIG_CISS_SCSI_TAPE 3341 else if (c->cmd_type == CMD_SCSI) 3342 complete_scsi_command(c, 0, a1); 3343# endif 3344 continue; 3345 } 3346 } 3347 } 3348 3349 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 3350 return IRQ_HANDLED; 3351} 3352 3353/** 3354 * add_to_scan_list() - add controller to rescan queue 3355 * @h: Pointer to the controller. 3356 * 3357 * Adds the controller to the rescan queue if not already on the queue. 3358 * 3359 * returns 1 if added to the queue, 0 if skipped (could be on the 3360 * queue already, or the controller could be initializing or shutting 3361 * down). 3362 **/ 3363static int add_to_scan_list(struct ctlr_info *h) 3364{ 3365 struct ctlr_info *test_h; 3366 int found = 0; 3367 int ret = 0; 3368 3369 if (h->busy_initializing) 3370 return 0; 3371 3372 if (!mutex_trylock(&h->busy_shutting_down)) 3373 return 0; 3374 3375 mutex_lock(&scan_mutex); 3376 list_for_each_entry(test_h, &scan_q, scan_list) { 3377 if (test_h == h) { 3378 found = 1; 3379 break; 3380 } 3381 } 3382 if (!found && !h->busy_scanning) { 3383 INIT_COMPLETION(h->scan_wait); 3384 list_add_tail(&h->scan_list, &scan_q); 3385 ret = 1; 3386 } 3387 mutex_unlock(&scan_mutex); 3388 mutex_unlock(&h->busy_shutting_down); 3389 3390 return ret; 3391} 3392 3393/** 3394 * remove_from_scan_list() - remove controller from rescan queue 3395 * @h: Pointer to the controller. 3396 * 3397 * Removes the controller from the rescan queue if present. Blocks if 3398 * the controller is currently conducting a rescan. 3399 **/ 3400static void remove_from_scan_list(struct ctlr_info *h) 3401{ 3402 struct ctlr_info *test_h, *tmp_h; 3403 int scanning = 0; 3404 3405 mutex_lock(&scan_mutex); 3406 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) { 3407 if (test_h == h) { 3408 list_del(&h->scan_list); 3409 complete_all(&h->scan_wait); 3410 mutex_unlock(&scan_mutex); 3411 return; 3412 } 3413 } 3414 if (&h->busy_scanning) 3415 scanning = 0; 3416 mutex_unlock(&scan_mutex); 3417 3418 if (scanning) 3419 wait_for_completion(&h->scan_wait); 3420} 3421 3422/** 3423 * scan_thread() - kernel thread used to rescan controllers 3424 * @data: Ignored. 3425 * 3426 * A kernel thread used scan for drive topology changes on 3427 * controllers. The thread processes only one controller at a time 3428 * using a queue. Controllers are added to the queue using 3429 * add_to_scan_list() and removed from the queue either after done 3430 * processing or using remove_from_scan_list(). 3431 * 3432 * returns 0. 3433 **/ 3434static int scan_thread(void *data) 3435{ 3436 struct ctlr_info *h; 3437 3438 while (1) { 3439 set_current_state(TASK_INTERRUPTIBLE); 3440 schedule(); 3441 if (kthread_should_stop()) 3442 break; 3443 3444 while (1) { 3445 mutex_lock(&scan_mutex); 3446 if (list_empty(&scan_q)) { 3447 mutex_unlock(&scan_mutex); 3448 break; 3449 } 3450 3451 h = list_entry(scan_q.next, 3452 struct ctlr_info, 3453 scan_list); 3454 list_del(&h->scan_list); 3455 h->busy_scanning = 1; 3456 mutex_unlock(&scan_mutex); 3457 3458 if (h) { 3459 rebuild_lun_table(h, 0, 0); 3460 complete_all(&h->scan_wait); 3461 mutex_lock(&scan_mutex); 3462 h->busy_scanning = 0; 3463 mutex_unlock(&scan_mutex); 3464 } 3465 } 3466 } 3467 3468 return 0; 3469} 3470 3471static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c) 3472{ 3473 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) 3474 return 0; 3475 3476 switch (c->err_info->SenseInfo[12]) { 3477 case STATE_CHANGED: 3478 printk(KERN_WARNING "cciss%d: a state change " 3479 "detected, command retried\n", h->ctlr); 3480 return 1; 3481 break; 3482 case LUN_FAILED: 3483 printk(KERN_WARNING "cciss%d: LUN failure " 3484 "detected, action required\n", h->ctlr); 3485 return 1; 3486 break; 3487 case REPORT_LUNS_CHANGED: 3488 printk(KERN_WARNING "cciss%d: report LUN data " 3489 "changed\n", h->ctlr); 3490 add_to_scan_list(h); 3491 wake_up_process(cciss_scan_thread); 3492 return 1; 3493 break; 3494 case POWER_OR_RESET: 3495 printk(KERN_WARNING "cciss%d: a power on " 3496 "or device reset detected\n", h->ctlr); 3497 return 1; 3498 break; 3499 case UNIT_ATTENTION_CLEARED: 3500 printk(KERN_WARNING "cciss%d: unit attention " 3501 "cleared by another initiator\n", h->ctlr); 3502 return 1; 3503 break; 3504 default: 3505 printk(KERN_WARNING "cciss%d: unknown " 3506 "unit attention detected\n", h->ctlr); 3507 return 1; 3508 } 3509} 3510 3511/* 3512 * We cannot read the structure directly, for portability we must use 3513 * the io functions. 3514 * This is for debug only. 3515 */ 3516#ifdef CCISS_DEBUG 3517static void print_cfg_table(CfgTable_struct *tb) 3518{ 3519 int i; 3520 char temp_name[17]; 3521 3522 printk("Controller Configuration information\n"); 3523 printk("------------------------------------\n"); 3524 for (i = 0; i < 4; i++) 3525 temp_name[i] = readb(&(tb->Signature[i])); 3526 temp_name[4] = '\0'; 3527 printk(" Signature = %s\n", temp_name); 3528 printk(" Spec Number = %d\n", readl(&(tb->SpecValence))); 3529 printk(" Transport methods supported = 0x%x\n", 3530 readl(&(tb->TransportSupport))); 3531 printk(" Transport methods active = 0x%x\n", 3532 readl(&(tb->TransportActive))); 3533 printk(" Requested transport Method = 0x%x\n", 3534 readl(&(tb->HostWrite.TransportRequest))); 3535 printk(" Coalesce Interrupt Delay = 0x%x\n", 3536 readl(&(tb->HostWrite.CoalIntDelay))); 3537 printk(" Coalesce Interrupt Count = 0x%x\n", 3538 readl(&(tb->HostWrite.CoalIntCount))); 3539 printk(" Max outstanding commands = 0x%d\n", 3540 readl(&(tb->CmdsOutMax))); 3541 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes))); 3542 for (i = 0; i < 16; i++) 3543 temp_name[i] = readb(&(tb->ServerName[i])); 3544 temp_name[16] = '\0'; 3545 printk(" Server Name = %s\n", temp_name); 3546 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat))); 3547} 3548#endif /* CCISS_DEBUG */ 3549 3550static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) 3551{ 3552 int i, offset, mem_type, bar_type; 3553 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ 3554 return 0; 3555 offset = 0; 3556 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3557 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; 3558 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) 3559 offset += 4; 3560 else { 3561 mem_type = pci_resource_flags(pdev, i) & 3562 PCI_BASE_ADDRESS_MEM_TYPE_MASK; 3563 switch (mem_type) { 3564 case PCI_BASE_ADDRESS_MEM_TYPE_32: 3565 case PCI_BASE_ADDRESS_MEM_TYPE_1M: 3566 offset += 4; /* 32 bit */ 3567 break; 3568 case PCI_BASE_ADDRESS_MEM_TYPE_64: 3569 offset += 8; 3570 break; 3571 default: /* reserved in PCI 2.2 */ 3572 printk(KERN_WARNING 3573 "Base address is invalid\n"); 3574 return -1; 3575 break; 3576 } 3577 } 3578 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) 3579 return i + 1; 3580 } 3581 return -1; 3582} 3583 3584/* If MSI/MSI-X is supported by the kernel we will try to enable it on 3585 * controllers that are capable. If not, we use IO-APIC mode. 3586 */ 3587 3588static void __devinit cciss_interrupt_mode(ctlr_info_t *c, 3589 struct pci_dev *pdev, __u32 board_id) 3590{ 3591#ifdef CONFIG_PCI_MSI 3592 int err; 3593 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1}, 3594 {0, 2}, {0, 3} 3595 }; 3596 3597 /* Some boards advertise MSI but don't really support it */ 3598 if ((board_id == 0x40700E11) || 3599 (board_id == 0x40800E11) || 3600 (board_id == 0x40820E11) || (board_id == 0x40830E11)) 3601 goto default_int_mode; 3602 3603 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) { 3604 err = pci_enable_msix(pdev, cciss_msix_entries, 4); 3605 if (!err) { 3606 c->intr[0] = cciss_msix_entries[0].vector; 3607 c->intr[1] = cciss_msix_entries[1].vector; 3608 c->intr[2] = cciss_msix_entries[2].vector; 3609 c->intr[3] = cciss_msix_entries[3].vector; 3610 c->msix_vector = 1; 3611 return; 3612 } 3613 if (err > 0) { 3614 printk(KERN_WARNING "cciss: only %d MSI-X vectors " 3615 "available\n", err); 3616 goto default_int_mode; 3617 } else { 3618 printk(KERN_WARNING "cciss: MSI-X init failed %d\n", 3619 err); 3620 goto default_int_mode; 3621 } 3622 } 3623 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) { 3624 if (!pci_enable_msi(pdev)) { 3625 c->msi_vector = 1; 3626 } else { 3627 printk(KERN_WARNING "cciss: MSI init failed\n"); 3628 } 3629 } 3630default_int_mode: 3631#endif /* CONFIG_PCI_MSI */ 3632 /* if we get here we're going to use the default interrupt mode */ 3633 c->intr[SIMPLE_MODE_INT] = pdev->irq; 3634 return; 3635} 3636 3637static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev) 3638{ 3639 ushort subsystem_vendor_id, subsystem_device_id, command; 3640 __u32 board_id, scratchpad = 0; 3641 __u64 cfg_offset; 3642 __u32 cfg_base_addr; 3643 __u64 cfg_base_addr_index; 3644 int i, err; 3645 3646 /* check to see if controller has been disabled */ 3647 /* BEFORE trying to enable it */ 3648 (void)pci_read_config_word(pdev, PCI_COMMAND, &command); 3649 if (!(command & 0x02)) { 3650 printk(KERN_WARNING 3651 "cciss: controller appears to be disabled\n"); 3652 return -ENODEV; 3653 } 3654 3655 err = pci_enable_device(pdev); 3656 if (err) { 3657 printk(KERN_ERR "cciss: Unable to Enable PCI device\n"); 3658 return err; 3659 } 3660 3661 err = pci_request_regions(pdev, "cciss"); 3662 if (err) { 3663 printk(KERN_ERR "cciss: Cannot obtain PCI resources, " 3664 "aborting\n"); 3665 return err; 3666 } 3667 3668 subsystem_vendor_id = pdev->subsystem_vendor; 3669 subsystem_device_id = pdev->subsystem_device; 3670 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) | 3671 subsystem_vendor_id); 3672 3673#ifdef CCISS_DEBUG 3674 printk("command = %x\n", command); 3675 printk("irq = %x\n", pdev->irq); 3676 printk("board_id = %x\n", board_id); 3677#endif /* CCISS_DEBUG */ 3678 3679/* If the kernel supports MSI/MSI-X we will try to enable that functionality, 3680 * else we use the IO-APIC interrupt assigned to us by system ROM. 3681 */ 3682 cciss_interrupt_mode(c, pdev, board_id); 3683 3684 /* find the memory BAR */ 3685 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3686 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) 3687 break; 3688 } 3689 if (i == DEVICE_COUNT_RESOURCE) { 3690 printk(KERN_WARNING "cciss: No memory BAR found\n"); 3691 err = -ENODEV; 3692 goto err_out_free_res; 3693 } 3694 3695 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits 3696 * already removed 3697 */ 3698 3699#ifdef CCISS_DEBUG 3700 printk("address 0 = %lx\n", c->paddr); 3701#endif /* CCISS_DEBUG */ 3702 c->vaddr = remap_pci_mem(c->paddr, 0x250); 3703 3704 /* Wait for the board to become ready. (PCI hotplug needs this.) 3705 * We poll for up to 120 secs, once per 100ms. */ 3706 for (i = 0; i < 1200; i++) { 3707 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET); 3708 if (scratchpad == CCISS_FIRMWARE_READY) 3709 break; 3710 set_current_state(TASK_INTERRUPTIBLE); 3711 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */ 3712 } 3713 if (scratchpad != CCISS_FIRMWARE_READY) { 3714 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n"); 3715 err = -ENODEV; 3716 goto err_out_free_res; 3717 } 3718 3719 /* get the address index number */ 3720 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET); 3721 cfg_base_addr &= (__u32) 0x0000ffff; 3722#ifdef CCISS_DEBUG 3723 printk("cfg base address = %x\n", cfg_base_addr); 3724#endif /* CCISS_DEBUG */ 3725 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr); 3726#ifdef CCISS_DEBUG 3727 printk("cfg base address index = %llx\n", 3728 (unsigned long long)cfg_base_addr_index); 3729#endif /* CCISS_DEBUG */ 3730 if (cfg_base_addr_index == -1) { 3731 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n"); 3732 err = -ENODEV; 3733 goto err_out_free_res; 3734 } 3735 3736 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET); 3737#ifdef CCISS_DEBUG 3738 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset); 3739#endif /* CCISS_DEBUG */ 3740 c->cfgtable = remap_pci_mem(pci_resource_start(pdev, 3741 cfg_base_addr_index) + 3742 cfg_offset, sizeof(CfgTable_struct)); 3743 c->board_id = board_id; 3744 3745#ifdef CCISS_DEBUG 3746 print_cfg_table(c->cfgtable); 3747#endif /* CCISS_DEBUG */ 3748 3749 /* Some controllers support Zero Memory Raid (ZMR). 3750 * When configured in ZMR mode the number of supported 3751 * commands drops to 64. So instead of just setting an 3752 * arbitrary value we make the driver a little smarter. 3753 * We read the config table to tell us how many commands 3754 * are supported on the controller then subtract 4 to 3755 * leave a little room for ioctl calls. 3756 */ 3757 c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); 3758 for (i = 0; i < ARRAY_SIZE(products); i++) { 3759 if (board_id == products[i].board_id) { 3760 c->product_name = products[i].product_name; 3761 c->access = *(products[i].access); 3762 c->nr_cmds = c->max_commands - 4; 3763 break; 3764 } 3765 } 3766 if ((readb(&c->cfgtable->Signature[0]) != 'C') || 3767 (readb(&c->cfgtable->Signature[1]) != 'I') || 3768 (readb(&c->cfgtable->Signature[2]) != 'S') || 3769 (readb(&c->cfgtable->Signature[3]) != 'S')) { 3770 printk("Does not appear to be a valid CISS config table\n"); 3771 err = -ENODEV; 3772 goto err_out_free_res; 3773 } 3774 /* We didn't find the controller in our list. We know the 3775 * signature is valid. If it's an HP device let's try to 3776 * bind to the device and fire it up. Otherwise we bail. 3777 */ 3778 if (i == ARRAY_SIZE(products)) { 3779 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) { 3780 c->product_name = products[i-1].product_name; 3781 c->access = *(products[i-1].access); 3782 c->nr_cmds = c->max_commands - 4; 3783 printk(KERN_WARNING "cciss: This is an unknown " 3784 "Smart Array controller.\n" 3785 "cciss: Please update to the latest driver " 3786 "available from www.hp.com.\n"); 3787 } else { 3788 printk(KERN_WARNING "cciss: Sorry, I don't know how" 3789 " to access the Smart Array controller %08lx\n" 3790 , (unsigned long)board_id); 3791 err = -ENODEV; 3792 goto err_out_free_res; 3793 } 3794 } 3795#ifdef CONFIG_X86 3796 { 3797 /* Need to enable prefetch in the SCSI core for 6400 in x86 */ 3798 __u32 prefetch; 3799 prefetch = readl(&(c->cfgtable->SCSI_Prefetch)); 3800 prefetch |= 0x100; 3801 writel(prefetch, &(c->cfgtable->SCSI_Prefetch)); 3802 } 3803#endif 3804 3805 /* Disabling DMA prefetch and refetch for the P600. 3806 * An ASIC bug may result in accesses to invalid memory addresses. 3807 * We've disabled prefetch for some time now. Testing with XEN 3808 * kernels revealed a bug in the refetch if dom0 resides on a P600. 3809 */ 3810 if(board_id == 0x3225103C) { 3811 __u32 dma_prefetch; 3812 __u32 dma_refetch; 3813 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG); 3814 dma_prefetch |= 0x8000; 3815 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG); 3816 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch); 3817 dma_refetch |= 0x1; 3818 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch); 3819 } 3820 3821#ifdef CCISS_DEBUG 3822 printk("Trying to put board into Simple mode\n"); 3823#endif /* CCISS_DEBUG */ 3824 c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); 3825 /* Update the field, and then ring the doorbell */ 3826 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest)); 3827 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL); 3828 3829 /* under certain very rare conditions, this can take awhile. 3830 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right 3831 * as we enter this code.) */ 3832 for (i = 0; i < MAX_CONFIG_WAIT; i++) { 3833 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) 3834 break; 3835 /* delay and try again */ 3836 set_current_state(TASK_INTERRUPTIBLE); 3837 schedule_timeout(msecs_to_jiffies(1)); 3838 } 3839 3840#ifdef CCISS_DEBUG 3841 printk(KERN_DEBUG "I counter got to %d %x\n", i, 3842 readl(c->vaddr + SA5_DOORBELL)); 3843#endif /* CCISS_DEBUG */ 3844#ifdef CCISS_DEBUG 3845 print_cfg_table(c->cfgtable); 3846#endif /* CCISS_DEBUG */ 3847 3848 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) { 3849 printk(KERN_WARNING "cciss: unable to get board into" 3850 " simple mode\n"); 3851 err = -ENODEV; 3852 goto err_out_free_res; 3853 } 3854 return 0; 3855 3856err_out_free_res: 3857 /* 3858 * Deliberately omit pci_disable_device(): it does something nasty to 3859 * Smart Array controllers that pci_enable_device does not undo 3860 */ 3861 pci_release_regions(pdev); 3862 return err; 3863} 3864 3865/* Function to find the first free pointer into our hba[] array 3866 * Returns -1 if no free entries are left. 3867 */ 3868static int alloc_cciss_hba(void) 3869{ 3870 int i; 3871 3872 for (i = 0; i < MAX_CTLR; i++) { 3873 if (!hba[i]) { 3874 ctlr_info_t *p; 3875 3876 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); 3877 if (!p) 3878 goto Enomem; 3879 hba[i] = p; 3880 return i; 3881 } 3882 } 3883 printk(KERN_WARNING "cciss: This driver supports a maximum" 3884 " of %d controllers.\n", MAX_CTLR); 3885 return -1; 3886Enomem: 3887 printk(KERN_ERR "cciss: out of memory.\n"); 3888 return -1; 3889} 3890 3891static void free_hba(int n) 3892{ 3893 ctlr_info_t *h = hba[n]; 3894 int i; 3895 3896 hba[n] = NULL; 3897 for (i = 0; i < h->highest_lun + 1; i++) 3898 if (h->gendisk[i] != NULL) 3899 put_disk(h->gendisk[i]); 3900 kfree(h); 3901} 3902 3903/* Send a message CDB to the firmware. */ 3904static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) 3905{ 3906 typedef struct { 3907 CommandListHeader_struct CommandHeader; 3908 RequestBlock_struct Request; 3909 ErrDescriptor_struct ErrorDescriptor; 3910 } Command; 3911 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); 3912 Command *cmd; 3913 dma_addr_t paddr64; 3914 uint32_t paddr32, tag; 3915 void __iomem *vaddr; 3916 int i, err; 3917 3918 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 3919 if (vaddr == NULL) 3920 return -ENOMEM; 3921 3922 /* The Inbound Post Queue only accepts 32-bit physical addresses for the 3923 CCISS commands, so they must be allocated from the lower 4GiB of 3924 memory. */ 3925 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 3926 if (err) { 3927 iounmap(vaddr); 3928 return -ENOMEM; 3929 } 3930 3931 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); 3932 if (cmd == NULL) { 3933 iounmap(vaddr); 3934 return -ENOMEM; 3935 } 3936 3937 /* This must fit, because of the 32-bit consistent DMA mask. Also, 3938 although there's no guarantee, we assume that the address is at 3939 least 4-byte aligned (most likely, it's page-aligned). */ 3940 paddr32 = paddr64; 3941 3942 cmd->CommandHeader.ReplyQueue = 0; 3943 cmd->CommandHeader.SGList = 0; 3944 cmd->CommandHeader.SGTotal = 0; 3945 cmd->CommandHeader.Tag.lower = paddr32; 3946 cmd->CommandHeader.Tag.upper = 0; 3947 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); 3948 3949 cmd->Request.CDBLen = 16; 3950 cmd->Request.Type.Type = TYPE_MSG; 3951 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; 3952 cmd->Request.Type.Direction = XFER_NONE; 3953 cmd->Request.Timeout = 0; /* Don't time out */ 3954 cmd->Request.CDB[0] = opcode; 3955 cmd->Request.CDB[1] = type; 3956 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ 3957 3958 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); 3959 cmd->ErrorDescriptor.Addr.upper = 0; 3960 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); 3961 3962 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); 3963 3964 for (i = 0; i < 10; i++) { 3965 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); 3966 if ((tag & ~3) == paddr32) 3967 break; 3968 schedule_timeout_uninterruptible(HZ); 3969 } 3970 3971 iounmap(vaddr); 3972 3973 /* we leak the DMA buffer here ... no choice since the controller could 3974 still complete the command. */ 3975 if (i == 10) { 3976 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n", 3977 opcode, type); 3978 return -ETIMEDOUT; 3979 } 3980 3981 pci_free_consistent(pdev, cmd_sz, cmd, paddr64); 3982 3983 if (tag & 2) { 3984 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n", 3985 opcode, type); 3986 return -EIO; 3987 } 3988 3989 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n", 3990 opcode, type); 3991 return 0; 3992} 3993 3994#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0) 3995#define cciss_noop(p) cciss_message(p, 3, 0) 3996 3997static __devinit int cciss_reset_msi(struct pci_dev *pdev) 3998{ 3999/* the #defines are stolen from drivers/pci/msi.h. */ 4000#define msi_control_reg(base) (base + PCI_MSI_FLAGS) 4001#define PCI_MSIX_FLAGS_ENABLE (1 << 15) 4002 4003 int pos; 4004 u16 control = 0; 4005 4006 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); 4007 if (pos) { 4008 pci_read_config_word(pdev, msi_control_reg(pos), &control); 4009 if (control & PCI_MSI_FLAGS_ENABLE) { 4010 printk(KERN_INFO "cciss: resetting MSI\n"); 4011 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE); 4012 } 4013 } 4014 4015 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); 4016 if (pos) { 4017 pci_read_config_word(pdev, msi_control_reg(pos), &control); 4018 if (control & PCI_MSIX_FLAGS_ENABLE) { 4019 printk(KERN_INFO "cciss: resetting MSI-X\n"); 4020 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE); 4021 } 4022 } 4023 4024 return 0; 4025} 4026 4027/* This does a hard reset of the controller using PCI power management 4028 * states. */ 4029static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev) 4030{ 4031 u16 pmcsr, saved_config_space[32]; 4032 int i, pos; 4033 4034 printk(KERN_INFO "cciss: using PCI PM to reset controller\n"); 4035 4036 /* This is very nearly the same thing as 4037 4038 pci_save_state(pci_dev); 4039 pci_set_power_state(pci_dev, PCI_D3hot); 4040 pci_set_power_state(pci_dev, PCI_D0); 4041 pci_restore_state(pci_dev); 4042 4043 but we can't use these nice canned kernel routines on 4044 kexec, because they also check the MSI/MSI-X state in PCI 4045 configuration space and do the wrong thing when it is 4046 set/cleared. Also, the pci_save/restore_state functions 4047 violate the ordering requirements for restoring the 4048 configuration space from the CCISS document (see the 4049 comment below). So we roll our own .... */ 4050 4051 for (i = 0; i < 32; i++) 4052 pci_read_config_word(pdev, 2*i, &saved_config_space[i]); 4053 4054 pos = pci_find_capability(pdev, PCI_CAP_ID_PM); 4055 if (pos == 0) { 4056 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n"); 4057 return -ENODEV; 4058 } 4059 4060 /* Quoting from the Open CISS Specification: "The Power 4061 * Management Control/Status Register (CSR) controls the power 4062 * state of the device. The normal operating state is D0, 4063 * CSR=00h. The software off state is D3, CSR=03h. To reset 4064 * the controller, place the interface device in D3 then to 4065 * D0, this causes a secondary PCI reset which will reset the 4066 * controller." */ 4067 4068 /* enter the D3hot power management state */ 4069 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); 4070 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4071 pmcsr |= PCI_D3hot; 4072 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4073 4074 schedule_timeout_uninterruptible(HZ >> 1); 4075 4076 /* enter the D0 power management state */ 4077 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4078 pmcsr |= PCI_D0; 4079 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4080 4081 schedule_timeout_uninterruptible(HZ >> 1); 4082 4083 /* Restore the PCI configuration space. The Open CISS 4084 * Specification says, "Restore the PCI Configuration 4085 * Registers, offsets 00h through 60h. It is important to 4086 * restore the command register, 16-bits at offset 04h, 4087 * last. Do not restore the configuration status register, 4088 * 16-bits at offset 06h." Note that the offset is 2*i. */ 4089 for (i = 0; i < 32; i++) { 4090 if (i == 2 || i == 3) 4091 continue; 4092 pci_write_config_word(pdev, 2*i, saved_config_space[i]); 4093 } 4094 wmb(); 4095 pci_write_config_word(pdev, 4, saved_config_space[2]); 4096 4097 return 0; 4098} 4099 4100/* 4101 * This is it. Find all the controllers and register them. I really hate 4102 * stealing all these major device numbers. 4103 * returns the number of block devices registered. 4104 */ 4105static int __devinit cciss_init_one(struct pci_dev *pdev, 4106 const struct pci_device_id *ent) 4107{ 4108 int i; 4109 int j = 0; 4110 int rc; 4111 int dac, return_code; 4112 InquiryData_struct *inq_buff; 4113 4114 if (reset_devices) { 4115 /* Reset the controller with a PCI power-cycle */ 4116 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev)) 4117 return -ENODEV; 4118 4119 /* Now try to get the controller to respond to a no-op. Some 4120 devices (notably the HP Smart Array 5i Controller) need 4121 up to 30 seconds to respond. */ 4122 for (i=0; i<30; i++) { 4123 if (cciss_noop(pdev) == 0) 4124 break; 4125 4126 schedule_timeout_uninterruptible(HZ); 4127 } 4128 if (i == 30) { 4129 printk(KERN_ERR "cciss: controller seems dead\n"); 4130 return -EBUSY; 4131 } 4132 } 4133 4134 i = alloc_cciss_hba(); 4135 if (i < 0) 4136 return -1; 4137 4138 hba[i]->busy_initializing = 1; 4139 INIT_HLIST_HEAD(&hba[i]->cmpQ); 4140 INIT_HLIST_HEAD(&hba[i]->reqQ); 4141 mutex_init(&hba[i]->busy_shutting_down); 4142 4143 if (cciss_pci_init(hba[i], pdev) != 0) 4144 goto clean0; 4145 4146 sprintf(hba[i]->devname, "cciss%d", i); 4147 hba[i]->ctlr = i; 4148 hba[i]->pdev = pdev; 4149 4150 init_completion(&hba[i]->scan_wait); 4151 4152 if (cciss_create_hba_sysfs_entry(hba[i])) 4153 goto clean0; 4154 4155 /* configure PCI DMA stuff */ 4156 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) 4157 dac = 1; 4158 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) 4159 dac = 0; 4160 else { 4161 printk(KERN_ERR "cciss: no suitable DMA available\n"); 4162 goto clean1; 4163 } 4164 4165 /* 4166 * register with the major number, or get a dynamic major number 4167 * by passing 0 as argument. This is done for greater than 4168 * 8 controller support. 4169 */ 4170 if (i < MAX_CTLR_ORIG) 4171 hba[i]->major = COMPAQ_CISS_MAJOR + i; 4172 rc = register_blkdev(hba[i]->major, hba[i]->devname); 4173 if (rc == -EBUSY || rc == -EINVAL) { 4174 printk(KERN_ERR 4175 "cciss: Unable to get major number %d for %s " 4176 "on hba %d\n", hba[i]->major, hba[i]->devname, i); 4177 goto clean1; 4178 } else { 4179 if (i >= MAX_CTLR_ORIG) 4180 hba[i]->major = rc; 4181 } 4182 4183 /* make sure the board interrupts are off */ 4184 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF); 4185 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr, 4186 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) { 4187 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n", 4188 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname); 4189 goto clean2; 4190 } 4191 4192 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n", 4193 hba[i]->devname, pdev->device, pci_name(pdev), 4194 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not"); 4195 4196 hba[i]->cmd_pool_bits = 4197 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4198 * sizeof(unsigned long), GFP_KERNEL); 4199 hba[i]->cmd_pool = (CommandList_struct *) 4200 pci_alloc_consistent(hba[i]->pdev, 4201 hba[i]->nr_cmds * sizeof(CommandList_struct), 4202 &(hba[i]->cmd_pool_dhandle)); 4203 hba[i]->errinfo_pool = (ErrorInfo_struct *) 4204 pci_alloc_consistent(hba[i]->pdev, 4205 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4206 &(hba[i]->errinfo_pool_dhandle)); 4207 if ((hba[i]->cmd_pool_bits == NULL) 4208 || (hba[i]->cmd_pool == NULL) 4209 || (hba[i]->errinfo_pool == NULL)) { 4210 printk(KERN_ERR "cciss: out of memory"); 4211 goto clean4; 4212 } 4213 spin_lock_init(&hba[i]->lock); 4214 4215 /* Initialize the pdev driver private data. 4216 have it point to hba[i]. */ 4217 pci_set_drvdata(pdev, hba[i]); 4218 /* command and error info recs zeroed out before 4219 they are used */ 4220 memset(hba[i]->cmd_pool_bits, 0, 4221 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4222 * sizeof(unsigned long)); 4223 4224 hba[i]->num_luns = 0; 4225 hba[i]->highest_lun = -1; 4226 for (j = 0; j < CISS_MAX_LUN; j++) { 4227 hba[i]->drv[j].raid_level = -1; 4228 hba[i]->drv[j].queue = NULL; 4229 hba[i]->gendisk[j] = NULL; 4230 } 4231 4232 cciss_scsi_setup(i); 4233 4234 /* Turn the interrupts on so we can service requests */ 4235 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON); 4236 4237 /* Get the firmware version */ 4238 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 4239 if (inq_buff == NULL) { 4240 printk(KERN_ERR "cciss: out of memory\n"); 4241 goto clean4; 4242 } 4243 4244 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff, 4245 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD); 4246 if (return_code == IO_OK) { 4247 hba[i]->firm_ver[0] = inq_buff->data_byte[32]; 4248 hba[i]->firm_ver[1] = inq_buff->data_byte[33]; 4249 hba[i]->firm_ver[2] = inq_buff->data_byte[34]; 4250 hba[i]->firm_ver[3] = inq_buff->data_byte[35]; 4251 } else { /* send command failed */ 4252 printk(KERN_WARNING "cciss: unable to determine firmware" 4253 " version of controller\n"); 4254 } 4255 kfree(inq_buff); 4256 4257 cciss_procinit(i); 4258 4259 hba[i]->cciss_max_sectors = 2048; 4260 4261 rebuild_lun_table(hba[i], 1, 0); 4262 hba[i]->busy_initializing = 0; 4263 return 1; 4264 4265clean4: 4266 kfree(hba[i]->cmd_pool_bits); 4267 if (hba[i]->cmd_pool) 4268 pci_free_consistent(hba[i]->pdev, 4269 hba[i]->nr_cmds * sizeof(CommandList_struct), 4270 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4271 if (hba[i]->errinfo_pool) 4272 pci_free_consistent(hba[i]->pdev, 4273 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4274 hba[i]->errinfo_pool, 4275 hba[i]->errinfo_pool_dhandle); 4276 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]); 4277clean2: 4278 unregister_blkdev(hba[i]->major, hba[i]->devname); 4279clean1: 4280 cciss_destroy_hba_sysfs_entry(hba[i]); 4281clean0: 4282 hba[i]->busy_initializing = 0; 4283 /* cleanup any queues that may have been initialized */ 4284 for (j=0; j <= hba[i]->highest_lun; j++){ 4285 drive_info_struct *drv = &(hba[i]->drv[j]); 4286 if (drv->queue) 4287 blk_cleanup_queue(drv->queue); 4288 } 4289 /* 4290 * Deliberately omit pci_disable_device(): it does something nasty to 4291 * Smart Array controllers that pci_enable_device does not undo 4292 */ 4293 pci_release_regions(pdev); 4294 pci_set_drvdata(pdev, NULL); 4295 free_hba(i); 4296 return -1; 4297} 4298 4299static void cciss_shutdown(struct pci_dev *pdev) 4300{ 4301 ctlr_info_t *tmp_ptr; 4302 int i; 4303 char flush_buf[4]; 4304 int return_code; 4305 4306 tmp_ptr = pci_get_drvdata(pdev); 4307 if (tmp_ptr == NULL) 4308 return; 4309 i = tmp_ptr->ctlr; 4310 if (hba[i] == NULL) 4311 return; 4312 4313 /* Turn board interrupts off and send the flush cache command */ 4314 /* sendcmd will turn off interrupt, and send the flush... 4315 * To write all data in the battery backed cache to disks */ 4316 memset(flush_buf, 0, 4); 4317 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 4318 CTLR_LUNID, TYPE_CMD); 4319 if (return_code == IO_OK) { 4320 printk(KERN_INFO "Completed flushing cache on controller %d\n", i); 4321 } else { 4322 printk(KERN_WARNING "Error flushing cache on controller %d\n", i); 4323 } 4324 free_irq(hba[i]->intr[2], hba[i]); 4325} 4326 4327static void __devexit cciss_remove_one(struct pci_dev *pdev) 4328{ 4329 ctlr_info_t *tmp_ptr; 4330 int i, j; 4331 4332 if (pci_get_drvdata(pdev) == NULL) { 4333 printk(KERN_ERR "cciss: Unable to remove device \n"); 4334 return; 4335 } 4336 4337 tmp_ptr = pci_get_drvdata(pdev); 4338 i = tmp_ptr->ctlr; 4339 if (hba[i] == NULL) { 4340 printk(KERN_ERR "cciss: device appears to " 4341 "already be removed \n"); 4342 return; 4343 } 4344 4345 mutex_lock(&hba[i]->busy_shutting_down); 4346 4347 remove_from_scan_list(hba[i]); 4348 remove_proc_entry(hba[i]->devname, proc_cciss); 4349 unregister_blkdev(hba[i]->major, hba[i]->devname); 4350 4351 /* remove it from the disk list */ 4352 for (j = 0; j < CISS_MAX_LUN; j++) { 4353 struct gendisk *disk = hba[i]->gendisk[j]; 4354 if (disk) { 4355 struct request_queue *q = disk->queue; 4356 4357 if (disk->flags & GENHD_FL_UP) { 4358 cciss_destroy_ld_sysfs_entry(hba[i], j, 1); 4359 del_gendisk(disk); 4360 } 4361 if (q) 4362 blk_cleanup_queue(q); 4363 } 4364 } 4365 4366#ifdef CONFIG_CISS_SCSI_TAPE 4367 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */ 4368#endif 4369 4370 cciss_shutdown(pdev); 4371 4372#ifdef CONFIG_PCI_MSI 4373 if (hba[i]->msix_vector) 4374 pci_disable_msix(hba[i]->pdev); 4375 else if (hba[i]->msi_vector) 4376 pci_disable_msi(hba[i]->pdev); 4377#endif /* CONFIG_PCI_MSI */ 4378 4379 iounmap(hba[i]->vaddr); 4380 4381 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct), 4382 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4383 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4384 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle); 4385 kfree(hba[i]->cmd_pool_bits); 4386 /* 4387 * Deliberately omit pci_disable_device(): it does something nasty to 4388 * Smart Array controllers that pci_enable_device does not undo 4389 */ 4390 pci_release_regions(pdev); 4391 pci_set_drvdata(pdev, NULL); 4392 cciss_destroy_hba_sysfs_entry(hba[i]); 4393 mutex_unlock(&hba[i]->busy_shutting_down); 4394 free_hba(i); 4395} 4396 4397static struct pci_driver cciss_pci_driver = { 4398 .name = "cciss", 4399 .probe = cciss_init_one, 4400 .remove = __devexit_p(cciss_remove_one), 4401 .id_table = cciss_pci_device_id, /* id_table */ 4402 .shutdown = cciss_shutdown, 4403}; 4404 4405/* 4406 * This is it. Register the PCI driver information for the cards we control 4407 * the OS will call our registered routines when it finds one of our cards. 4408 */ 4409static int __init cciss_init(void) 4410{ 4411 int err; 4412 4413 /* 4414 * The hardware requires that commands are aligned on a 64-bit 4415 * boundary. Given that we use pci_alloc_consistent() to allocate an 4416 * array of them, the size must be a multiple of 8 bytes. 4417 */ 4418 BUILD_BUG_ON(sizeof(CommandList_struct) % 8); 4419 4420 printk(KERN_INFO DRIVER_NAME "\n"); 4421 4422 err = bus_register(&cciss_bus_type); 4423 if (err) 4424 return err; 4425 4426 /* Start the scan thread */ 4427 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan"); 4428 if (IS_ERR(cciss_scan_thread)) { 4429 err = PTR_ERR(cciss_scan_thread); 4430 goto err_bus_unregister; 4431 } 4432 4433 /* Register for our PCI devices */ 4434 err = pci_register_driver(&cciss_pci_driver); 4435 if (err) 4436 goto err_thread_stop; 4437 4438 return err; 4439 4440err_thread_stop: 4441 kthread_stop(cciss_scan_thread); 4442err_bus_unregister: 4443 bus_unregister(&cciss_bus_type); 4444 4445 return err; 4446} 4447 4448static void __exit cciss_cleanup(void) 4449{ 4450 int i; 4451 4452 pci_unregister_driver(&cciss_pci_driver); 4453 /* double check that all controller entrys have been removed */ 4454 for (i = 0; i < MAX_CTLR; i++) { 4455 if (hba[i] != NULL) { 4456 printk(KERN_WARNING "cciss: had to remove" 4457 " controller %d\n", i); 4458 cciss_remove_one(hba[i]->pdev); 4459 } 4460 } 4461 kthread_stop(cciss_scan_thread); 4462 remove_proc_entry("driver/cciss", NULL); 4463 bus_unregister(&cciss_bus_type); 4464} 4465 4466static void fail_all_cmds(unsigned long ctlr) 4467{ 4468 /* If we get here, the board is apparently dead. */ 4469 ctlr_info_t *h = hba[ctlr]; 4470 CommandList_struct *c; 4471 unsigned long flags; 4472 4473 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr); 4474 h->alive = 0; /* the controller apparently died... */ 4475 4476 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 4477 4478 pci_disable_device(h->pdev); /* Make sure it is really dead. */ 4479 4480 /* move everything off the request queue onto the completed queue */ 4481 while (!hlist_empty(&h->reqQ)) { 4482 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 4483 removeQ(c); 4484 h->Qdepth--; 4485 addQ(&h->cmpQ, c); 4486 } 4487 4488 /* Now, fail everything on the completed queue with a HW error */ 4489 while (!hlist_empty(&h->cmpQ)) { 4490 c = hlist_entry(h->cmpQ.first, CommandList_struct, list); 4491 removeQ(c); 4492 if (c->cmd_type != CMD_MSG_STALE) 4493 c->err_info->CommandStatus = CMD_HARDWARE_ERR; 4494 if (c->cmd_type == CMD_RWREQ) { 4495 complete_command(h, c, 0); 4496 } else if (c->cmd_type == CMD_IOCTL_PEND) 4497 complete(c->waiting); 4498#ifdef CONFIG_CISS_SCSI_TAPE 4499 else if (c->cmd_type == CMD_SCSI) 4500 complete_scsi_command(c, 0, 0); 4501#endif 4502 } 4503 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 4504 return; 4505} 4506 4507module_init(cciss_init); 4508module_exit(cciss_cleanup); 4509