cciss.c revision 8ba95c69fe6eb65ff36b64136ae24844ddba16a1
1/* 2 * Disk Array driver for HP Smart Array controllers. 3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 * 02111-1307, USA. 18 * 19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com 20 * 21 */ 22 23#include <linux/module.h> 24#include <linux/interrupt.h> 25#include <linux/types.h> 26#include <linux/pci.h> 27#include <linux/kernel.h> 28#include <linux/slab.h> 29#include <linux/smp_lock.h> 30#include <linux/delay.h> 31#include <linux/major.h> 32#include <linux/fs.h> 33#include <linux/bio.h> 34#include <linux/blkpg.h> 35#include <linux/timer.h> 36#include <linux/proc_fs.h> 37#include <linux/seq_file.h> 38#include <linux/init.h> 39#include <linux/jiffies.h> 40#include <linux/hdreg.h> 41#include <linux/spinlock.h> 42#include <linux/compat.h> 43#include <linux/mutex.h> 44#include <asm/uaccess.h> 45#include <asm/io.h> 46 47#include <linux/dma-mapping.h> 48#include <linux/blkdev.h> 49#include <linux/genhd.h> 50#include <linux/completion.h> 51#include <scsi/scsi.h> 52#include <scsi/sg.h> 53#include <scsi/scsi_ioctl.h> 54#include <linux/cdrom.h> 55#include <linux/scatterlist.h> 56#include <linux/kthread.h> 57 58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin)) 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)" 60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20) 61 62/* Embedded module documentation macros - see modules.h */ 63MODULE_AUTHOR("Hewlett-Packard Company"); 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers"); 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400" 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m" 67 " Smart Array G2 Series SAS/SATA Controllers"); 68MODULE_VERSION("3.6.20"); 69MODULE_LICENSE("GPL"); 70 71static int cciss_allow_hpsa; 72module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR); 73MODULE_PARM_DESC(cciss_allow_hpsa, 74 "Prevent cciss driver from accessing hardware known to be " 75 " supported by the hpsa driver"); 76 77#include "cciss_cmd.h" 78#include "cciss.h" 79#include <linux/cciss_ioctl.h> 80 81/* define the PCI info for the cards we can control */ 82static const struct pci_device_id cciss_pci_device_id[] = { 83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070}, 84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080}, 85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082}, 86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083}, 87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091}, 88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A}, 89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B}, 90 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C}, 91 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D}, 92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225}, 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223}, 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234}, 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235}, 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211}, 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212}, 98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213}, 99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214}, 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215}, 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237}, 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D}, 103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241}, 104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243}, 105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245}, 106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247}, 107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249}, 108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A}, 109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B}, 110 {0,} 111}; 112 113MODULE_DEVICE_TABLE(pci, cciss_pci_device_id); 114 115/* board_id = Subsystem Device ID & Vendor ID 116 * product = Marketing Name for the board 117 * access = Address of the struct of function pointers 118 */ 119static struct board_type products[] = { 120 {0x40700E11, "Smart Array 5300", &SA5_access}, 121 {0x40800E11, "Smart Array 5i", &SA5B_access}, 122 {0x40820E11, "Smart Array 532", &SA5B_access}, 123 {0x40830E11, "Smart Array 5312", &SA5B_access}, 124 {0x409A0E11, "Smart Array 641", &SA5_access}, 125 {0x409B0E11, "Smart Array 642", &SA5_access}, 126 {0x409C0E11, "Smart Array 6400", &SA5_access}, 127 {0x409D0E11, "Smart Array 6400 EM", &SA5_access}, 128 {0x40910E11, "Smart Array 6i", &SA5_access}, 129 {0x3225103C, "Smart Array P600", &SA5_access}, 130 {0x3235103C, "Smart Array P400i", &SA5_access}, 131 {0x3211103C, "Smart Array E200i", &SA5_access}, 132 {0x3212103C, "Smart Array E200", &SA5_access}, 133 {0x3213103C, "Smart Array E200i", &SA5_access}, 134 {0x3214103C, "Smart Array E200i", &SA5_access}, 135 {0x3215103C, "Smart Array E200i", &SA5_access}, 136 {0x3237103C, "Smart Array E500", &SA5_access}, 137/* controllers below this line are also supported by the hpsa driver. */ 138#define HPSA_BOUNDARY 0x3223103C 139 {0x3223103C, "Smart Array P800", &SA5_access}, 140 {0x3234103C, "Smart Array P400", &SA5_access}, 141 {0x323D103C, "Smart Array P700m", &SA5_access}, 142 {0x3241103C, "Smart Array P212", &SA5_access}, 143 {0x3243103C, "Smart Array P410", &SA5_access}, 144 {0x3245103C, "Smart Array P410i", &SA5_access}, 145 {0x3247103C, "Smart Array P411", &SA5_access}, 146 {0x3249103C, "Smart Array P812", &SA5_access}, 147 {0x324A103C, "Smart Array P712m", &SA5_access}, 148 {0x324B103C, "Smart Array P711m", &SA5_access}, 149}; 150 151/* How long to wait (in milliseconds) for board to go into simple mode */ 152#define MAX_CONFIG_WAIT 30000 153#define MAX_IOCTL_CONFIG_WAIT 1000 154 155/*define how many times we will try a command because of bus resets */ 156#define MAX_CMD_RETRIES 3 157 158#define MAX_CTLR 32 159 160/* Originally cciss driver only supports 8 major numbers */ 161#define MAX_CTLR_ORIG 8 162 163static ctlr_info_t *hba[MAX_CTLR]; 164 165static struct task_struct *cciss_scan_thread; 166static DEFINE_MUTEX(scan_mutex); 167static LIST_HEAD(scan_q); 168 169static void do_cciss_request(struct request_queue *q); 170static irqreturn_t do_cciss_intr(int irq, void *dev_id); 171static int cciss_open(struct block_device *bdev, fmode_t mode); 172static int cciss_release(struct gendisk *disk, fmode_t mode); 173static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 174 unsigned int cmd, unsigned long arg); 175static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); 176 177static int cciss_revalidate(struct gendisk *disk); 178static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl); 179static int deregister_disk(ctlr_info_t *h, int drv_index, 180 int clear_all, int via_ioctl); 181 182static void cciss_read_capacity(int ctlr, int logvol, int withirq, 183 sector_t *total_size, unsigned int *block_size); 184static void cciss_read_capacity_16(int ctlr, int logvol, int withirq, 185 sector_t *total_size, unsigned int *block_size); 186static void cciss_geometry_inquiry(int ctlr, int logvol, 187 int withirq, sector_t total_size, 188 unsigned int block_size, InquiryData_struct *inq_buff, 189 drive_info_struct *drv); 190static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *, 191 __u32); 192static void start_io(ctlr_info_t *h); 193static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, 194 __u8 page_code, unsigned char *scsi3addr, int cmd_type); 195static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 196 __u8 page_code, unsigned char scsi3addr[], 197 int cmd_type); 198static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 199 int attempt_retry); 200static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c); 201 202static void fail_all_cmds(unsigned long ctlr); 203static int add_to_scan_list(struct ctlr_info *h); 204static int scan_thread(void *data); 205static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c); 206static void cciss_hba_release(struct device *dev); 207static void cciss_device_release(struct device *dev); 208static void cciss_free_gendisk(ctlr_info_t *h, int drv_index); 209static void cciss_free_drive_info(ctlr_info_t *h, int drv_index); 210 211#ifdef CONFIG_PROC_FS 212static void cciss_procinit(int i); 213#else 214static void cciss_procinit(int i) 215{ 216} 217#endif /* CONFIG_PROC_FS */ 218 219#ifdef CONFIG_COMPAT 220static int cciss_compat_ioctl(struct block_device *, fmode_t, 221 unsigned, unsigned long); 222#endif 223 224static const struct block_device_operations cciss_fops = { 225 .owner = THIS_MODULE, 226 .open = cciss_open, 227 .release = cciss_release, 228 .locked_ioctl = cciss_ioctl, 229 .getgeo = cciss_getgeo, 230#ifdef CONFIG_COMPAT 231 .compat_ioctl = cciss_compat_ioctl, 232#endif 233 .revalidate_disk = cciss_revalidate, 234}; 235 236/* 237 * Enqueuing and dequeuing functions for cmdlists. 238 */ 239static inline void addQ(struct hlist_head *list, CommandList_struct *c) 240{ 241 hlist_add_head(&c->list, list); 242} 243 244static inline void removeQ(CommandList_struct *c) 245{ 246 /* 247 * After kexec/dump some commands might still 248 * be in flight, which the firmware will try 249 * to complete. Resetting the firmware doesn't work 250 * with old fw revisions, so we have to mark 251 * them off as 'stale' to prevent the driver from 252 * falling over. 253 */ 254 if (WARN_ON(hlist_unhashed(&c->list))) { 255 c->cmd_type = CMD_MSG_STALE; 256 return; 257 } 258 259 hlist_del_init(&c->list); 260} 261 262#include "cciss_scsi.c" /* For SCSI tape support */ 263 264static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", 265 "UNKNOWN" 266}; 267#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1) 268 269#ifdef CONFIG_PROC_FS 270 271/* 272 * Report information about this controller. 273 */ 274#define ENG_GIG 1000000000 275#define ENG_GIG_FACTOR (ENG_GIG/512) 276#define ENGAGE_SCSI "engage scsi" 277 278static struct proc_dir_entry *proc_cciss; 279 280static void cciss_seq_show_header(struct seq_file *seq) 281{ 282 ctlr_info_t *h = seq->private; 283 284 seq_printf(seq, "%s: HP %s Controller\n" 285 "Board ID: 0x%08lx\n" 286 "Firmware Version: %c%c%c%c\n" 287 "IRQ: %d\n" 288 "Logical drives: %d\n" 289 "Current Q depth: %d\n" 290 "Current # commands on controller: %d\n" 291 "Max Q depth since init: %d\n" 292 "Max # commands on controller since init: %d\n" 293 "Max SG entries since init: %d\n", 294 h->devname, 295 h->product_name, 296 (unsigned long)h->board_id, 297 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], 298 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT], 299 h->num_luns, 300 h->Qdepth, h->commands_outstanding, 301 h->maxQsinceinit, h->max_outstanding, h->maxSG); 302 303#ifdef CONFIG_CISS_SCSI_TAPE 304 cciss_seq_tape_report(seq, h->ctlr); 305#endif /* CONFIG_CISS_SCSI_TAPE */ 306} 307 308static void *cciss_seq_start(struct seq_file *seq, loff_t *pos) 309{ 310 ctlr_info_t *h = seq->private; 311 unsigned ctlr = h->ctlr; 312 unsigned long flags; 313 314 /* prevent displaying bogus info during configuration 315 * or deconfiguration of a logical volume 316 */ 317 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 318 if (h->busy_configuring) { 319 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 320 return ERR_PTR(-EBUSY); 321 } 322 h->busy_configuring = 1; 323 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 324 325 if (*pos == 0) 326 cciss_seq_show_header(seq); 327 328 return pos; 329} 330 331static int cciss_seq_show(struct seq_file *seq, void *v) 332{ 333 sector_t vol_sz, vol_sz_frac; 334 ctlr_info_t *h = seq->private; 335 unsigned ctlr = h->ctlr; 336 loff_t *pos = v; 337 drive_info_struct *drv = h->drv[*pos]; 338 339 if (*pos > h->highest_lun) 340 return 0; 341 342 if (drv->heads == 0) 343 return 0; 344 345 vol_sz = drv->nr_blocks; 346 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR); 347 vol_sz_frac *= 100; 348 sector_div(vol_sz_frac, ENG_GIG_FACTOR); 349 350 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN) 351 drv->raid_level = RAID_UNKNOWN; 352 seq_printf(seq, "cciss/c%dd%d:" 353 "\t%4u.%02uGB\tRAID %s\n", 354 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac, 355 raid_label[drv->raid_level]); 356 return 0; 357} 358 359static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos) 360{ 361 ctlr_info_t *h = seq->private; 362 363 if (*pos > h->highest_lun) 364 return NULL; 365 *pos += 1; 366 367 return pos; 368} 369 370static void cciss_seq_stop(struct seq_file *seq, void *v) 371{ 372 ctlr_info_t *h = seq->private; 373 374 /* Only reset h->busy_configuring if we succeeded in setting 375 * it during cciss_seq_start. */ 376 if (v == ERR_PTR(-EBUSY)) 377 return; 378 379 h->busy_configuring = 0; 380} 381 382static const struct seq_operations cciss_seq_ops = { 383 .start = cciss_seq_start, 384 .show = cciss_seq_show, 385 .next = cciss_seq_next, 386 .stop = cciss_seq_stop, 387}; 388 389static int cciss_seq_open(struct inode *inode, struct file *file) 390{ 391 int ret = seq_open(file, &cciss_seq_ops); 392 struct seq_file *seq = file->private_data; 393 394 if (!ret) 395 seq->private = PDE(inode)->data; 396 397 return ret; 398} 399 400static ssize_t 401cciss_proc_write(struct file *file, const char __user *buf, 402 size_t length, loff_t *ppos) 403{ 404 int err; 405 char *buffer; 406 407#ifndef CONFIG_CISS_SCSI_TAPE 408 return -EINVAL; 409#endif 410 411 if (!buf || length > PAGE_SIZE - 1) 412 return -EINVAL; 413 414 buffer = (char *)__get_free_page(GFP_KERNEL); 415 if (!buffer) 416 return -ENOMEM; 417 418 err = -EFAULT; 419 if (copy_from_user(buffer, buf, length)) 420 goto out; 421 buffer[length] = '\0'; 422 423#ifdef CONFIG_CISS_SCSI_TAPE 424 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) { 425 struct seq_file *seq = file->private_data; 426 ctlr_info_t *h = seq->private; 427 int rc; 428 429 rc = cciss_engage_scsi(h->ctlr); 430 if (rc != 0) 431 err = -rc; 432 else 433 err = length; 434 } else 435#endif /* CONFIG_CISS_SCSI_TAPE */ 436 err = -EINVAL; 437 /* might be nice to have "disengage" too, but it's not 438 safely possible. (only 1 module use count, lock issues.) */ 439 440out: 441 free_page((unsigned long)buffer); 442 return err; 443} 444 445static const struct file_operations cciss_proc_fops = { 446 .owner = THIS_MODULE, 447 .open = cciss_seq_open, 448 .read = seq_read, 449 .llseek = seq_lseek, 450 .release = seq_release, 451 .write = cciss_proc_write, 452}; 453 454static void __devinit cciss_procinit(int i) 455{ 456 struct proc_dir_entry *pde; 457 458 if (proc_cciss == NULL) 459 proc_cciss = proc_mkdir("driver/cciss", NULL); 460 if (!proc_cciss) 461 return; 462 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP | 463 S_IROTH, proc_cciss, 464 &cciss_proc_fops, hba[i]); 465} 466#endif /* CONFIG_PROC_FS */ 467 468#define MAX_PRODUCT_NAME_LEN 19 469 470#define to_hba(n) container_of(n, struct ctlr_info, dev) 471#define to_drv(n) container_of(n, drive_info_struct, dev) 472 473static ssize_t host_store_rescan(struct device *dev, 474 struct device_attribute *attr, 475 const char *buf, size_t count) 476{ 477 struct ctlr_info *h = to_hba(dev); 478 479 add_to_scan_list(h); 480 wake_up_process(cciss_scan_thread); 481 wait_for_completion_interruptible(&h->scan_wait); 482 483 return count; 484} 485static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); 486 487static ssize_t dev_show_unique_id(struct device *dev, 488 struct device_attribute *attr, 489 char *buf) 490{ 491 drive_info_struct *drv = to_drv(dev); 492 struct ctlr_info *h = to_hba(drv->dev.parent); 493 __u8 sn[16]; 494 unsigned long flags; 495 int ret = 0; 496 497 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 498 if (h->busy_configuring) 499 ret = -EBUSY; 500 else 501 memcpy(sn, drv->serial_no, sizeof(sn)); 502 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 503 504 if (ret) 505 return ret; 506 else 507 return snprintf(buf, 16 * 2 + 2, 508 "%02X%02X%02X%02X%02X%02X%02X%02X" 509 "%02X%02X%02X%02X%02X%02X%02X%02X\n", 510 sn[0], sn[1], sn[2], sn[3], 511 sn[4], sn[5], sn[6], sn[7], 512 sn[8], sn[9], sn[10], sn[11], 513 sn[12], sn[13], sn[14], sn[15]); 514} 515static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL); 516 517static ssize_t dev_show_vendor(struct device *dev, 518 struct device_attribute *attr, 519 char *buf) 520{ 521 drive_info_struct *drv = to_drv(dev); 522 struct ctlr_info *h = to_hba(drv->dev.parent); 523 char vendor[VENDOR_LEN + 1]; 524 unsigned long flags; 525 int ret = 0; 526 527 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 528 if (h->busy_configuring) 529 ret = -EBUSY; 530 else 531 memcpy(vendor, drv->vendor, VENDOR_LEN + 1); 532 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 533 534 if (ret) 535 return ret; 536 else 537 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor); 538} 539static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL); 540 541static ssize_t dev_show_model(struct device *dev, 542 struct device_attribute *attr, 543 char *buf) 544{ 545 drive_info_struct *drv = to_drv(dev); 546 struct ctlr_info *h = to_hba(drv->dev.parent); 547 char model[MODEL_LEN + 1]; 548 unsigned long flags; 549 int ret = 0; 550 551 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 552 if (h->busy_configuring) 553 ret = -EBUSY; 554 else 555 memcpy(model, drv->model, MODEL_LEN + 1); 556 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 557 558 if (ret) 559 return ret; 560 else 561 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model); 562} 563static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL); 564 565static ssize_t dev_show_rev(struct device *dev, 566 struct device_attribute *attr, 567 char *buf) 568{ 569 drive_info_struct *drv = to_drv(dev); 570 struct ctlr_info *h = to_hba(drv->dev.parent); 571 char rev[REV_LEN + 1]; 572 unsigned long flags; 573 int ret = 0; 574 575 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 576 if (h->busy_configuring) 577 ret = -EBUSY; 578 else 579 memcpy(rev, drv->rev, REV_LEN + 1); 580 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 581 582 if (ret) 583 return ret; 584 else 585 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev); 586} 587static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); 588 589static ssize_t cciss_show_lunid(struct device *dev, 590 struct device_attribute *attr, char *buf) 591{ 592 drive_info_struct *drv = to_drv(dev); 593 struct ctlr_info *h = to_hba(drv->dev.parent); 594 unsigned long flags; 595 unsigned char lunid[8]; 596 597 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 598 if (h->busy_configuring) { 599 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 600 return -EBUSY; 601 } 602 if (!drv->heads) { 603 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 604 return -ENOTTY; 605 } 606 memcpy(lunid, drv->LunID, sizeof(lunid)); 607 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 608 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 609 lunid[0], lunid[1], lunid[2], lunid[3], 610 lunid[4], lunid[5], lunid[6], lunid[7]); 611} 612static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); 613 614static ssize_t cciss_show_raid_level(struct device *dev, 615 struct device_attribute *attr, char *buf) 616{ 617 drive_info_struct *drv = to_drv(dev); 618 struct ctlr_info *h = to_hba(drv->dev.parent); 619 int raid; 620 unsigned long flags; 621 622 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 623 if (h->busy_configuring) { 624 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 625 return -EBUSY; 626 } 627 raid = drv->raid_level; 628 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 629 if (raid < 0 || raid > RAID_UNKNOWN) 630 raid = RAID_UNKNOWN; 631 632 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n", 633 raid_label[raid]); 634} 635static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL); 636 637static ssize_t cciss_show_usage_count(struct device *dev, 638 struct device_attribute *attr, char *buf) 639{ 640 drive_info_struct *drv = to_drv(dev); 641 struct ctlr_info *h = to_hba(drv->dev.parent); 642 unsigned long flags; 643 int count; 644 645 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 646 if (h->busy_configuring) { 647 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 648 return -EBUSY; 649 } 650 count = drv->usage_count; 651 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 652 return snprintf(buf, 20, "%d\n", count); 653} 654static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); 655 656static struct attribute *cciss_host_attrs[] = { 657 &dev_attr_rescan.attr, 658 NULL 659}; 660 661static struct attribute_group cciss_host_attr_group = { 662 .attrs = cciss_host_attrs, 663}; 664 665static const struct attribute_group *cciss_host_attr_groups[] = { 666 &cciss_host_attr_group, 667 NULL 668}; 669 670static struct device_type cciss_host_type = { 671 .name = "cciss_host", 672 .groups = cciss_host_attr_groups, 673 .release = cciss_hba_release, 674}; 675 676static struct attribute *cciss_dev_attrs[] = { 677 &dev_attr_unique_id.attr, 678 &dev_attr_model.attr, 679 &dev_attr_vendor.attr, 680 &dev_attr_rev.attr, 681 &dev_attr_lunid.attr, 682 &dev_attr_raid_level.attr, 683 &dev_attr_usage_count.attr, 684 NULL 685}; 686 687static struct attribute_group cciss_dev_attr_group = { 688 .attrs = cciss_dev_attrs, 689}; 690 691static const struct attribute_group *cciss_dev_attr_groups[] = { 692 &cciss_dev_attr_group, 693 NULL 694}; 695 696static struct device_type cciss_dev_type = { 697 .name = "cciss_device", 698 .groups = cciss_dev_attr_groups, 699 .release = cciss_device_release, 700}; 701 702static struct bus_type cciss_bus_type = { 703 .name = "cciss", 704}; 705 706/* 707 * cciss_hba_release is called when the reference count 708 * of h->dev goes to zero. 709 */ 710static void cciss_hba_release(struct device *dev) 711{ 712 /* 713 * nothing to do, but need this to avoid a warning 714 * about not having a release handler from lib/kref.c. 715 */ 716} 717 718/* 719 * Initialize sysfs entry for each controller. This sets up and registers 720 * the 'cciss#' directory for each individual controller under 721 * /sys/bus/pci/devices/<dev>/. 722 */ 723static int cciss_create_hba_sysfs_entry(struct ctlr_info *h) 724{ 725 device_initialize(&h->dev); 726 h->dev.type = &cciss_host_type; 727 h->dev.bus = &cciss_bus_type; 728 dev_set_name(&h->dev, "%s", h->devname); 729 h->dev.parent = &h->pdev->dev; 730 731 return device_add(&h->dev); 732} 733 734/* 735 * Remove sysfs entries for an hba. 736 */ 737static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h) 738{ 739 device_del(&h->dev); 740 put_device(&h->dev); /* final put. */ 741} 742 743/* cciss_device_release is called when the reference count 744 * of h->drv[x]dev goes to zero. 745 */ 746static void cciss_device_release(struct device *dev) 747{ 748 drive_info_struct *drv = to_drv(dev); 749 kfree(drv); 750} 751 752/* 753 * Initialize sysfs for each logical drive. This sets up and registers 754 * the 'c#d#' directory for each individual logical drive under 755 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from 756 * /sys/block/cciss!c#d# to this entry. 757 */ 758static long cciss_create_ld_sysfs_entry(struct ctlr_info *h, 759 int drv_index) 760{ 761 struct device *dev; 762 763 if (h->drv[drv_index]->device_initialized) 764 return 0; 765 766 dev = &h->drv[drv_index]->dev; 767 device_initialize(dev); 768 dev->type = &cciss_dev_type; 769 dev->bus = &cciss_bus_type; 770 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index); 771 dev->parent = &h->dev; 772 h->drv[drv_index]->device_initialized = 1; 773 return device_add(dev); 774} 775 776/* 777 * Remove sysfs entries for a logical drive. 778 */ 779static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index, 780 int ctlr_exiting) 781{ 782 struct device *dev = &h->drv[drv_index]->dev; 783 784 /* special case for c*d0, we only destroy it on controller exit */ 785 if (drv_index == 0 && !ctlr_exiting) 786 return; 787 788 device_del(dev); 789 put_device(dev); /* the "final" put. */ 790 h->drv[drv_index] = NULL; 791} 792 793/* 794 * For operations that cannot sleep, a command block is allocated at init, 795 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track 796 * which ones are free or in use. For operations that can wait for kmalloc 797 * to possible sleep, this routine can be called with get_from_pool set to 0. 798 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was. 799 */ 800static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool) 801{ 802 CommandList_struct *c; 803 int i; 804 u64bit temp64; 805 dma_addr_t cmd_dma_handle, err_dma_handle; 806 807 if (!get_from_pool) { 808 c = (CommandList_struct *) pci_alloc_consistent(h->pdev, 809 sizeof(CommandList_struct), &cmd_dma_handle); 810 if (c == NULL) 811 return NULL; 812 memset(c, 0, sizeof(CommandList_struct)); 813 814 c->cmdindex = -1; 815 816 c->err_info = (ErrorInfo_struct *) 817 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct), 818 &err_dma_handle); 819 820 if (c->err_info == NULL) { 821 pci_free_consistent(h->pdev, 822 sizeof(CommandList_struct), c, cmd_dma_handle); 823 return NULL; 824 } 825 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 826 } else { /* get it out of the controllers pool */ 827 828 do { 829 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); 830 if (i == h->nr_cmds) 831 return NULL; 832 } while (test_and_set_bit 833 (i & (BITS_PER_LONG - 1), 834 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); 835#ifdef CCISS_DEBUG 836 printk(KERN_DEBUG "cciss: using command buffer %d\n", i); 837#endif 838 c = h->cmd_pool + i; 839 memset(c, 0, sizeof(CommandList_struct)); 840 cmd_dma_handle = h->cmd_pool_dhandle 841 + i * sizeof(CommandList_struct); 842 c->err_info = h->errinfo_pool + i; 843 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 844 err_dma_handle = h->errinfo_pool_dhandle 845 + i * sizeof(ErrorInfo_struct); 846 h->nr_allocs++; 847 848 c->cmdindex = i; 849 } 850 851 INIT_HLIST_NODE(&c->list); 852 c->busaddr = (__u32) cmd_dma_handle; 853 temp64.val = (__u64) err_dma_handle; 854 c->ErrDesc.Addr.lower = temp64.val32.lower; 855 c->ErrDesc.Addr.upper = temp64.val32.upper; 856 c->ErrDesc.Len = sizeof(ErrorInfo_struct); 857 858 c->ctlr = h->ctlr; 859 return c; 860} 861 862/* 863 * Frees a command block that was previously allocated with cmd_alloc(). 864 */ 865static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool) 866{ 867 int i; 868 u64bit temp64; 869 870 if (!got_from_pool) { 871 temp64.val32.lower = c->ErrDesc.Addr.lower; 872 temp64.val32.upper = c->ErrDesc.Addr.upper; 873 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct), 874 c->err_info, (dma_addr_t) temp64.val); 875 pci_free_consistent(h->pdev, sizeof(CommandList_struct), 876 c, (dma_addr_t) c->busaddr); 877 } else { 878 i = c - h->cmd_pool; 879 clear_bit(i & (BITS_PER_LONG - 1), 880 h->cmd_pool_bits + (i / BITS_PER_LONG)); 881 h->nr_frees++; 882 } 883} 884 885static inline ctlr_info_t *get_host(struct gendisk *disk) 886{ 887 return disk->queue->queuedata; 888} 889 890static inline drive_info_struct *get_drv(struct gendisk *disk) 891{ 892 return disk->private_data; 893} 894 895/* 896 * Open. Make sure the device is really there. 897 */ 898static int cciss_open(struct block_device *bdev, fmode_t mode) 899{ 900 ctlr_info_t *host = get_host(bdev->bd_disk); 901 drive_info_struct *drv = get_drv(bdev->bd_disk); 902 903#ifdef CCISS_DEBUG 904 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name); 905#endif /* CCISS_DEBUG */ 906 907 if (drv->busy_configuring) 908 return -EBUSY; 909 /* 910 * Root is allowed to open raw volume zero even if it's not configured 911 * so array config can still work. Root is also allowed to open any 912 * volume that has a LUN ID, so it can issue IOCTL to reread the 913 * disk information. I don't think I really like this 914 * but I'm already using way to many device nodes to claim another one 915 * for "raw controller". 916 */ 917 if (drv->heads == 0) { 918 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */ 919 /* if not node 0 make sure it is a partition = 0 */ 920 if (MINOR(bdev->bd_dev) & 0x0f) { 921 return -ENXIO; 922 /* if it is, make sure we have a LUN ID */ 923 } else if (memcmp(drv->LunID, CTLR_LUNID, 924 sizeof(drv->LunID))) { 925 return -ENXIO; 926 } 927 } 928 if (!capable(CAP_SYS_ADMIN)) 929 return -EPERM; 930 } 931 drv->usage_count++; 932 host->usage_count++; 933 return 0; 934} 935 936/* 937 * Close. Sync first. 938 */ 939static int cciss_release(struct gendisk *disk, fmode_t mode) 940{ 941 ctlr_info_t *host = get_host(disk); 942 drive_info_struct *drv = get_drv(disk); 943 944#ifdef CCISS_DEBUG 945 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name); 946#endif /* CCISS_DEBUG */ 947 948 drv->usage_count--; 949 host->usage_count--; 950 return 0; 951} 952 953#ifdef CONFIG_COMPAT 954 955static int do_ioctl(struct block_device *bdev, fmode_t mode, 956 unsigned cmd, unsigned long arg) 957{ 958 int ret; 959 lock_kernel(); 960 ret = cciss_ioctl(bdev, mode, cmd, arg); 961 unlock_kernel(); 962 return ret; 963} 964 965static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 966 unsigned cmd, unsigned long arg); 967static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 968 unsigned cmd, unsigned long arg); 969 970static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode, 971 unsigned cmd, unsigned long arg) 972{ 973 switch (cmd) { 974 case CCISS_GETPCIINFO: 975 case CCISS_GETINTINFO: 976 case CCISS_SETINTINFO: 977 case CCISS_GETNODENAME: 978 case CCISS_SETNODENAME: 979 case CCISS_GETHEARTBEAT: 980 case CCISS_GETBUSTYPES: 981 case CCISS_GETFIRMVER: 982 case CCISS_GETDRIVVER: 983 case CCISS_REVALIDVOLS: 984 case CCISS_DEREGDISK: 985 case CCISS_REGNEWDISK: 986 case CCISS_REGNEWD: 987 case CCISS_RESCANDISK: 988 case CCISS_GETLUNINFO: 989 return do_ioctl(bdev, mode, cmd, arg); 990 991 case CCISS_PASSTHRU32: 992 return cciss_ioctl32_passthru(bdev, mode, cmd, arg); 993 case CCISS_BIG_PASSTHRU32: 994 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg); 995 996 default: 997 return -ENOIOCTLCMD; 998 } 999} 1000 1001static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 1002 unsigned cmd, unsigned long arg) 1003{ 1004 IOCTL32_Command_struct __user *arg32 = 1005 (IOCTL32_Command_struct __user *) arg; 1006 IOCTL_Command_struct arg64; 1007 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); 1008 int err; 1009 u32 cp; 1010 1011 err = 0; 1012 err |= 1013 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 1014 sizeof(arg64.LUN_info)); 1015 err |= 1016 copy_from_user(&arg64.Request, &arg32->Request, 1017 sizeof(arg64.Request)); 1018 err |= 1019 copy_from_user(&arg64.error_info, &arg32->error_info, 1020 sizeof(arg64.error_info)); 1021 err |= get_user(arg64.buf_size, &arg32->buf_size); 1022 err |= get_user(cp, &arg32->buf); 1023 arg64.buf = compat_ptr(cp); 1024 err |= copy_to_user(p, &arg64, sizeof(arg64)); 1025 1026 if (err) 1027 return -EFAULT; 1028 1029 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p); 1030 if (err) 1031 return err; 1032 err |= 1033 copy_in_user(&arg32->error_info, &p->error_info, 1034 sizeof(arg32->error_info)); 1035 if (err) 1036 return -EFAULT; 1037 return err; 1038} 1039 1040static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 1041 unsigned cmd, unsigned long arg) 1042{ 1043 BIG_IOCTL32_Command_struct __user *arg32 = 1044 (BIG_IOCTL32_Command_struct __user *) arg; 1045 BIG_IOCTL_Command_struct arg64; 1046 BIG_IOCTL_Command_struct __user *p = 1047 compat_alloc_user_space(sizeof(arg64)); 1048 int err; 1049 u32 cp; 1050 1051 err = 0; 1052 err |= 1053 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 1054 sizeof(arg64.LUN_info)); 1055 err |= 1056 copy_from_user(&arg64.Request, &arg32->Request, 1057 sizeof(arg64.Request)); 1058 err |= 1059 copy_from_user(&arg64.error_info, &arg32->error_info, 1060 sizeof(arg64.error_info)); 1061 err |= get_user(arg64.buf_size, &arg32->buf_size); 1062 err |= get_user(arg64.malloc_size, &arg32->malloc_size); 1063 err |= get_user(cp, &arg32->buf); 1064 arg64.buf = compat_ptr(cp); 1065 err |= copy_to_user(p, &arg64, sizeof(arg64)); 1066 1067 if (err) 1068 return -EFAULT; 1069 1070 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p); 1071 if (err) 1072 return err; 1073 err |= 1074 copy_in_user(&arg32->error_info, &p->error_info, 1075 sizeof(arg32->error_info)); 1076 if (err) 1077 return -EFAULT; 1078 return err; 1079} 1080#endif 1081 1082static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1083{ 1084 drive_info_struct *drv = get_drv(bdev->bd_disk); 1085 1086 if (!drv->cylinders) 1087 return -ENXIO; 1088 1089 geo->heads = drv->heads; 1090 geo->sectors = drv->sectors; 1091 geo->cylinders = drv->cylinders; 1092 return 0; 1093} 1094 1095static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c) 1096{ 1097 if (c->err_info->CommandStatus == CMD_TARGET_STATUS && 1098 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) 1099 (void)check_for_unit_attention(host, c); 1100} 1101/* 1102 * ioctl 1103 */ 1104static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 1105 unsigned int cmd, unsigned long arg) 1106{ 1107 struct gendisk *disk = bdev->bd_disk; 1108 ctlr_info_t *host = get_host(disk); 1109 drive_info_struct *drv = get_drv(disk); 1110 int ctlr = host->ctlr; 1111 void __user *argp = (void __user *)arg; 1112 1113#ifdef CCISS_DEBUG 1114 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg); 1115#endif /* CCISS_DEBUG */ 1116 1117 switch (cmd) { 1118 case CCISS_GETPCIINFO: 1119 { 1120 cciss_pci_info_struct pciinfo; 1121 1122 if (!arg) 1123 return -EINVAL; 1124 pciinfo.domain = pci_domain_nr(host->pdev->bus); 1125 pciinfo.bus = host->pdev->bus->number; 1126 pciinfo.dev_fn = host->pdev->devfn; 1127 pciinfo.board_id = host->board_id; 1128 if (copy_to_user 1129 (argp, &pciinfo, sizeof(cciss_pci_info_struct))) 1130 return -EFAULT; 1131 return 0; 1132 } 1133 case CCISS_GETINTINFO: 1134 { 1135 cciss_coalint_struct intinfo; 1136 if (!arg) 1137 return -EINVAL; 1138 intinfo.delay = 1139 readl(&host->cfgtable->HostWrite.CoalIntDelay); 1140 intinfo.count = 1141 readl(&host->cfgtable->HostWrite.CoalIntCount); 1142 if (copy_to_user 1143 (argp, &intinfo, sizeof(cciss_coalint_struct))) 1144 return -EFAULT; 1145 return 0; 1146 } 1147 case CCISS_SETINTINFO: 1148 { 1149 cciss_coalint_struct intinfo; 1150 unsigned long flags; 1151 int i; 1152 1153 if (!arg) 1154 return -EINVAL; 1155 if (!capable(CAP_SYS_ADMIN)) 1156 return -EPERM; 1157 if (copy_from_user 1158 (&intinfo, argp, sizeof(cciss_coalint_struct))) 1159 return -EFAULT; 1160 if ((intinfo.delay == 0) && (intinfo.count == 0)) 1161 { 1162// printk("cciss_ioctl: delay and count cannot be 0\n"); 1163 return -EINVAL; 1164 } 1165 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1166 /* Update the field, and then ring the doorbell */ 1167 writel(intinfo.delay, 1168 &(host->cfgtable->HostWrite.CoalIntDelay)); 1169 writel(intinfo.count, 1170 &(host->cfgtable->HostWrite.CoalIntCount)); 1171 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1172 1173 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1174 if (!(readl(host->vaddr + SA5_DOORBELL) 1175 & CFGTBL_ChangeReq)) 1176 break; 1177 /* delay and try again */ 1178 udelay(1000); 1179 } 1180 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1181 if (i >= MAX_IOCTL_CONFIG_WAIT) 1182 return -EAGAIN; 1183 return 0; 1184 } 1185 case CCISS_GETNODENAME: 1186 { 1187 NodeName_type NodeName; 1188 int i; 1189 1190 if (!arg) 1191 return -EINVAL; 1192 for (i = 0; i < 16; i++) 1193 NodeName[i] = 1194 readb(&host->cfgtable->ServerName[i]); 1195 if (copy_to_user(argp, NodeName, sizeof(NodeName_type))) 1196 return -EFAULT; 1197 return 0; 1198 } 1199 case CCISS_SETNODENAME: 1200 { 1201 NodeName_type NodeName; 1202 unsigned long flags; 1203 int i; 1204 1205 if (!arg) 1206 return -EINVAL; 1207 if (!capable(CAP_SYS_ADMIN)) 1208 return -EPERM; 1209 1210 if (copy_from_user 1211 (NodeName, argp, sizeof(NodeName_type))) 1212 return -EFAULT; 1213 1214 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1215 1216 /* Update the field, and then ring the doorbell */ 1217 for (i = 0; i < 16; i++) 1218 writeb(NodeName[i], 1219 &host->cfgtable->ServerName[i]); 1220 1221 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1222 1223 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1224 if (!(readl(host->vaddr + SA5_DOORBELL) 1225 & CFGTBL_ChangeReq)) 1226 break; 1227 /* delay and try again */ 1228 udelay(1000); 1229 } 1230 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1231 if (i >= MAX_IOCTL_CONFIG_WAIT) 1232 return -EAGAIN; 1233 return 0; 1234 } 1235 1236 case CCISS_GETHEARTBEAT: 1237 { 1238 Heartbeat_type heartbeat; 1239 1240 if (!arg) 1241 return -EINVAL; 1242 heartbeat = readl(&host->cfgtable->HeartBeat); 1243 if (copy_to_user 1244 (argp, &heartbeat, sizeof(Heartbeat_type))) 1245 return -EFAULT; 1246 return 0; 1247 } 1248 case CCISS_GETBUSTYPES: 1249 { 1250 BusTypes_type BusTypes; 1251 1252 if (!arg) 1253 return -EINVAL; 1254 BusTypes = readl(&host->cfgtable->BusTypes); 1255 if (copy_to_user 1256 (argp, &BusTypes, sizeof(BusTypes_type))) 1257 return -EFAULT; 1258 return 0; 1259 } 1260 case CCISS_GETFIRMVER: 1261 { 1262 FirmwareVer_type firmware; 1263 1264 if (!arg) 1265 return -EINVAL; 1266 memcpy(firmware, host->firm_ver, 4); 1267 1268 if (copy_to_user 1269 (argp, firmware, sizeof(FirmwareVer_type))) 1270 return -EFAULT; 1271 return 0; 1272 } 1273 case CCISS_GETDRIVVER: 1274 { 1275 DriverVer_type DriverVer = DRIVER_VERSION; 1276 1277 if (!arg) 1278 return -EINVAL; 1279 1280 if (copy_to_user 1281 (argp, &DriverVer, sizeof(DriverVer_type))) 1282 return -EFAULT; 1283 return 0; 1284 } 1285 1286 case CCISS_DEREGDISK: 1287 case CCISS_REGNEWD: 1288 case CCISS_REVALIDVOLS: 1289 return rebuild_lun_table(host, 0, 1); 1290 1291 case CCISS_GETLUNINFO:{ 1292 LogvolInfo_struct luninfo; 1293 1294 memcpy(&luninfo.LunID, drv->LunID, 1295 sizeof(luninfo.LunID)); 1296 luninfo.num_opens = drv->usage_count; 1297 luninfo.num_parts = 0; 1298 if (copy_to_user(argp, &luninfo, 1299 sizeof(LogvolInfo_struct))) 1300 return -EFAULT; 1301 return 0; 1302 } 1303 case CCISS_PASSTHRU: 1304 { 1305 IOCTL_Command_struct iocommand; 1306 CommandList_struct *c; 1307 char *buff = NULL; 1308 u64bit temp64; 1309 unsigned long flags; 1310 DECLARE_COMPLETION_ONSTACK(wait); 1311 1312 if (!arg) 1313 return -EINVAL; 1314 1315 if (!capable(CAP_SYS_RAWIO)) 1316 return -EPERM; 1317 1318 if (copy_from_user 1319 (&iocommand, argp, sizeof(IOCTL_Command_struct))) 1320 return -EFAULT; 1321 if ((iocommand.buf_size < 1) && 1322 (iocommand.Request.Type.Direction != XFER_NONE)) { 1323 return -EINVAL; 1324 } 1325#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */ 1326 /* Check kmalloc limits */ 1327 if (iocommand.buf_size > 128000) 1328 return -EINVAL; 1329#endif 1330 if (iocommand.buf_size > 0) { 1331 buff = kmalloc(iocommand.buf_size, GFP_KERNEL); 1332 if (buff == NULL) 1333 return -EFAULT; 1334 } 1335 if (iocommand.Request.Type.Direction == XFER_WRITE) { 1336 /* Copy the data into the buffer we created */ 1337 if (copy_from_user 1338 (buff, iocommand.buf, iocommand.buf_size)) { 1339 kfree(buff); 1340 return -EFAULT; 1341 } 1342 } else { 1343 memset(buff, 0, iocommand.buf_size); 1344 } 1345 if ((c = cmd_alloc(host, 0)) == NULL) { 1346 kfree(buff); 1347 return -ENOMEM; 1348 } 1349 // Fill in the command type 1350 c->cmd_type = CMD_IOCTL_PEND; 1351 // Fill in Command Header 1352 c->Header.ReplyQueue = 0; // unused in simple mode 1353 if (iocommand.buf_size > 0) // buffer to fill 1354 { 1355 c->Header.SGList = 1; 1356 c->Header.SGTotal = 1; 1357 } else // no buffers to fill 1358 { 1359 c->Header.SGList = 0; 1360 c->Header.SGTotal = 0; 1361 } 1362 c->Header.LUN = iocommand.LUN_info; 1363 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag 1364 1365 // Fill in Request block 1366 c->Request = iocommand.Request; 1367 1368 // Fill in the scatter gather information 1369 if (iocommand.buf_size > 0) { 1370 temp64.val = pci_map_single(host->pdev, buff, 1371 iocommand.buf_size, 1372 PCI_DMA_BIDIRECTIONAL); 1373 c->SG[0].Addr.lower = temp64.val32.lower; 1374 c->SG[0].Addr.upper = temp64.val32.upper; 1375 c->SG[0].Len = iocommand.buf_size; 1376 c->SG[0].Ext = 0; // we are not chaining 1377 } 1378 c->waiting = &wait; 1379 1380 /* Put the request on the tail of the request queue */ 1381 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1382 addQ(&host->reqQ, c); 1383 host->Qdepth++; 1384 start_io(host); 1385 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1386 1387 wait_for_completion(&wait); 1388 1389 /* unlock the buffers from DMA */ 1390 temp64.val32.lower = c->SG[0].Addr.lower; 1391 temp64.val32.upper = c->SG[0].Addr.upper; 1392 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val, 1393 iocommand.buf_size, 1394 PCI_DMA_BIDIRECTIONAL); 1395 1396 check_ioctl_unit_attention(host, c); 1397 1398 /* Copy the error information out */ 1399 iocommand.error_info = *(c->err_info); 1400 if (copy_to_user 1401 (argp, &iocommand, sizeof(IOCTL_Command_struct))) { 1402 kfree(buff); 1403 cmd_free(host, c, 0); 1404 return -EFAULT; 1405 } 1406 1407 if (iocommand.Request.Type.Direction == XFER_READ) { 1408 /* Copy the data out of the buffer we created */ 1409 if (copy_to_user 1410 (iocommand.buf, buff, iocommand.buf_size)) { 1411 kfree(buff); 1412 cmd_free(host, c, 0); 1413 return -EFAULT; 1414 } 1415 } 1416 kfree(buff); 1417 cmd_free(host, c, 0); 1418 return 0; 1419 } 1420 case CCISS_BIG_PASSTHRU:{ 1421 BIG_IOCTL_Command_struct *ioc; 1422 CommandList_struct *c; 1423 unsigned char **buff = NULL; 1424 int *buff_size = NULL; 1425 u64bit temp64; 1426 unsigned long flags; 1427 BYTE sg_used = 0; 1428 int status = 0; 1429 int i; 1430 DECLARE_COMPLETION_ONSTACK(wait); 1431 __u32 left; 1432 __u32 sz; 1433 BYTE __user *data_ptr; 1434 1435 if (!arg) 1436 return -EINVAL; 1437 if (!capable(CAP_SYS_RAWIO)) 1438 return -EPERM; 1439 ioc = (BIG_IOCTL_Command_struct *) 1440 kmalloc(sizeof(*ioc), GFP_KERNEL); 1441 if (!ioc) { 1442 status = -ENOMEM; 1443 goto cleanup1; 1444 } 1445 if (copy_from_user(ioc, argp, sizeof(*ioc))) { 1446 status = -EFAULT; 1447 goto cleanup1; 1448 } 1449 if ((ioc->buf_size < 1) && 1450 (ioc->Request.Type.Direction != XFER_NONE)) { 1451 status = -EINVAL; 1452 goto cleanup1; 1453 } 1454 /* Check kmalloc limits using all SGs */ 1455 if (ioc->malloc_size > MAX_KMALLOC_SIZE) { 1456 status = -EINVAL; 1457 goto cleanup1; 1458 } 1459 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { 1460 status = -EINVAL; 1461 goto cleanup1; 1462 } 1463 buff = 1464 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); 1465 if (!buff) { 1466 status = -ENOMEM; 1467 goto cleanup1; 1468 } 1469 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), 1470 GFP_KERNEL); 1471 if (!buff_size) { 1472 status = -ENOMEM; 1473 goto cleanup1; 1474 } 1475 left = ioc->buf_size; 1476 data_ptr = ioc->buf; 1477 while (left) { 1478 sz = (left > 1479 ioc->malloc_size) ? ioc-> 1480 malloc_size : left; 1481 buff_size[sg_used] = sz; 1482 buff[sg_used] = kmalloc(sz, GFP_KERNEL); 1483 if (buff[sg_used] == NULL) { 1484 status = -ENOMEM; 1485 goto cleanup1; 1486 } 1487 if (ioc->Request.Type.Direction == XFER_WRITE) { 1488 if (copy_from_user 1489 (buff[sg_used], data_ptr, sz)) { 1490 status = -EFAULT; 1491 goto cleanup1; 1492 } 1493 } else { 1494 memset(buff[sg_used], 0, sz); 1495 } 1496 left -= sz; 1497 data_ptr += sz; 1498 sg_used++; 1499 } 1500 if ((c = cmd_alloc(host, 0)) == NULL) { 1501 status = -ENOMEM; 1502 goto cleanup1; 1503 } 1504 c->cmd_type = CMD_IOCTL_PEND; 1505 c->Header.ReplyQueue = 0; 1506 1507 if (ioc->buf_size > 0) { 1508 c->Header.SGList = sg_used; 1509 c->Header.SGTotal = sg_used; 1510 } else { 1511 c->Header.SGList = 0; 1512 c->Header.SGTotal = 0; 1513 } 1514 c->Header.LUN = ioc->LUN_info; 1515 c->Header.Tag.lower = c->busaddr; 1516 1517 c->Request = ioc->Request; 1518 if (ioc->buf_size > 0) { 1519 int i; 1520 for (i = 0; i < sg_used; i++) { 1521 temp64.val = 1522 pci_map_single(host->pdev, buff[i], 1523 buff_size[i], 1524 PCI_DMA_BIDIRECTIONAL); 1525 c->SG[i].Addr.lower = 1526 temp64.val32.lower; 1527 c->SG[i].Addr.upper = 1528 temp64.val32.upper; 1529 c->SG[i].Len = buff_size[i]; 1530 c->SG[i].Ext = 0; /* we are not chaining */ 1531 } 1532 } 1533 c->waiting = &wait; 1534 /* Put the request on the tail of the request queue */ 1535 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1536 addQ(&host->reqQ, c); 1537 host->Qdepth++; 1538 start_io(host); 1539 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1540 wait_for_completion(&wait); 1541 /* unlock the buffers from DMA */ 1542 for (i = 0; i < sg_used; i++) { 1543 temp64.val32.lower = c->SG[i].Addr.lower; 1544 temp64.val32.upper = c->SG[i].Addr.upper; 1545 pci_unmap_single(host->pdev, 1546 (dma_addr_t) temp64.val, buff_size[i], 1547 PCI_DMA_BIDIRECTIONAL); 1548 } 1549 check_ioctl_unit_attention(host, c); 1550 /* Copy the error information out */ 1551 ioc->error_info = *(c->err_info); 1552 if (copy_to_user(argp, ioc, sizeof(*ioc))) { 1553 cmd_free(host, c, 0); 1554 status = -EFAULT; 1555 goto cleanup1; 1556 } 1557 if (ioc->Request.Type.Direction == XFER_READ) { 1558 /* Copy the data out of the buffer we created */ 1559 BYTE __user *ptr = ioc->buf; 1560 for (i = 0; i < sg_used; i++) { 1561 if (copy_to_user 1562 (ptr, buff[i], buff_size[i])) { 1563 cmd_free(host, c, 0); 1564 status = -EFAULT; 1565 goto cleanup1; 1566 } 1567 ptr += buff_size[i]; 1568 } 1569 } 1570 cmd_free(host, c, 0); 1571 status = 0; 1572 cleanup1: 1573 if (buff) { 1574 for (i = 0; i < sg_used; i++) 1575 kfree(buff[i]); 1576 kfree(buff); 1577 } 1578 kfree(buff_size); 1579 kfree(ioc); 1580 return status; 1581 } 1582 1583 /* scsi_cmd_ioctl handles these, below, though some are not */ 1584 /* very meaningful for cciss. SG_IO is the main one people want. */ 1585 1586 case SG_GET_VERSION_NUM: 1587 case SG_SET_TIMEOUT: 1588 case SG_GET_TIMEOUT: 1589 case SG_GET_RESERVED_SIZE: 1590 case SG_SET_RESERVED_SIZE: 1591 case SG_EMULATED_HOST: 1592 case SG_IO: 1593 case SCSI_IOCTL_SEND_COMMAND: 1594 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); 1595 1596 /* scsi_cmd_ioctl would normally handle these, below, but */ 1597 /* they aren't a good fit for cciss, as CD-ROMs are */ 1598 /* not supported, and we don't have any bus/target/lun */ 1599 /* which we present to the kernel. */ 1600 1601 case CDROM_SEND_PACKET: 1602 case CDROMCLOSETRAY: 1603 case CDROMEJECT: 1604 case SCSI_IOCTL_GET_IDLUN: 1605 case SCSI_IOCTL_GET_BUS_NUMBER: 1606 default: 1607 return -ENOTTY; 1608 } 1609} 1610 1611static void cciss_check_queues(ctlr_info_t *h) 1612{ 1613 int start_queue = h->next_to_run; 1614 int i; 1615 1616 /* check to see if we have maxed out the number of commands that can 1617 * be placed on the queue. If so then exit. We do this check here 1618 * in case the interrupt we serviced was from an ioctl and did not 1619 * free any new commands. 1620 */ 1621 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) 1622 return; 1623 1624 /* We have room on the queue for more commands. Now we need to queue 1625 * them up. We will also keep track of the next queue to run so 1626 * that every queue gets a chance to be started first. 1627 */ 1628 for (i = 0; i < h->highest_lun + 1; i++) { 1629 int curr_queue = (start_queue + i) % (h->highest_lun + 1); 1630 /* make sure the disk has been added and the drive is real 1631 * because this can be called from the middle of init_one. 1632 */ 1633 if (!h->drv[curr_queue]) 1634 continue; 1635 if (!(h->drv[curr_queue]->queue) || 1636 !(h->drv[curr_queue]->heads)) 1637 continue; 1638 blk_start_queue(h->gendisk[curr_queue]->queue); 1639 1640 /* check to see if we have maxed out the number of commands 1641 * that can be placed on the queue. 1642 */ 1643 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) { 1644 if (curr_queue == start_queue) { 1645 h->next_to_run = 1646 (start_queue + 1) % (h->highest_lun + 1); 1647 break; 1648 } else { 1649 h->next_to_run = curr_queue; 1650 break; 1651 } 1652 } 1653 } 1654} 1655 1656static void cciss_softirq_done(struct request *rq) 1657{ 1658 CommandList_struct *cmd = rq->completion_data; 1659 ctlr_info_t *h = hba[cmd->ctlr]; 1660 unsigned long flags; 1661 u64bit temp64; 1662 int i, ddir; 1663 1664 if (cmd->Request.Type.Direction == XFER_READ) 1665 ddir = PCI_DMA_FROMDEVICE; 1666 else 1667 ddir = PCI_DMA_TODEVICE; 1668 1669 /* command did not need to be retried */ 1670 /* unmap the DMA mapping for all the scatter gather elements */ 1671 for (i = 0; i < cmd->Header.SGList; i++) { 1672 temp64.val32.lower = cmd->SG[i].Addr.lower; 1673 temp64.val32.upper = cmd->SG[i].Addr.upper; 1674 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir); 1675 } 1676 1677#ifdef CCISS_DEBUG 1678 printk("Done with %p\n", rq); 1679#endif /* CCISS_DEBUG */ 1680 1681 /* set the residual count for pc requests */ 1682 if (blk_pc_request(rq)) 1683 rq->resid_len = cmd->err_info->ResidualCnt; 1684 1685 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO); 1686 1687 spin_lock_irqsave(&h->lock, flags); 1688 cmd_free(h, cmd, 1); 1689 cciss_check_queues(h); 1690 spin_unlock_irqrestore(&h->lock, flags); 1691} 1692 1693static inline void log_unit_to_scsi3addr(ctlr_info_t *h, 1694 unsigned char scsi3addr[], uint32_t log_unit) 1695{ 1696 memcpy(scsi3addr, h->drv[log_unit]->LunID, 1697 sizeof(h->drv[log_unit]->LunID)); 1698} 1699 1700/* This function gets the SCSI vendor, model, and revision of a logical drive 1701 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if 1702 * they cannot be read. 1703 */ 1704static void cciss_get_device_descr(int ctlr, int logvol, int withirq, 1705 char *vendor, char *model, char *rev) 1706{ 1707 int rc; 1708 InquiryData_struct *inq_buf; 1709 unsigned char scsi3addr[8]; 1710 1711 *vendor = '\0'; 1712 *model = '\0'; 1713 *rev = '\0'; 1714 1715 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1716 if (!inq_buf) 1717 return; 1718 1719 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1720 if (withirq) 1721 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, 1722 sizeof(InquiryData_struct), 0, 1723 scsi3addr, TYPE_CMD); 1724 else 1725 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf, 1726 sizeof(InquiryData_struct), 0, 1727 scsi3addr, TYPE_CMD); 1728 if (rc == IO_OK) { 1729 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN); 1730 vendor[VENDOR_LEN] = '\0'; 1731 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN); 1732 model[MODEL_LEN] = '\0'; 1733 memcpy(rev, &inq_buf->data_byte[32], REV_LEN); 1734 rev[REV_LEN] = '\0'; 1735 } 1736 1737 kfree(inq_buf); 1738 return; 1739} 1740 1741/* This function gets the serial number of a logical drive via 1742 * inquiry page 0x83. Serial no. is 16 bytes. If the serial 1743 * number cannot be had, for whatever reason, 16 bytes of 0xff 1744 * are returned instead. 1745 */ 1746static void cciss_get_serial_no(int ctlr, int logvol, int withirq, 1747 unsigned char *serial_no, int buflen) 1748{ 1749#define PAGE_83_INQ_BYTES 64 1750 int rc; 1751 unsigned char *buf; 1752 unsigned char scsi3addr[8]; 1753 1754 if (buflen > 16) 1755 buflen = 16; 1756 memset(serial_no, 0xff, buflen); 1757 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); 1758 if (!buf) 1759 return; 1760 memset(serial_no, 0, buflen); 1761 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1762 if (withirq) 1763 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf, 1764 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); 1765 else 1766 rc = sendcmd(CISS_INQUIRY, ctlr, buf, 1767 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); 1768 if (rc == IO_OK) 1769 memcpy(serial_no, &buf[8], buflen); 1770 kfree(buf); 1771 return; 1772} 1773 1774/* 1775 * cciss_add_disk sets up the block device queue for a logical drive 1776 */ 1777static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, 1778 int drv_index) 1779{ 1780 disk->queue = blk_init_queue(do_cciss_request, &h->lock); 1781 if (!disk->queue) 1782 goto init_queue_failure; 1783 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index); 1784 disk->major = h->major; 1785 disk->first_minor = drv_index << NWD_SHIFT; 1786 disk->fops = &cciss_fops; 1787 if (cciss_create_ld_sysfs_entry(h, drv_index)) 1788 goto cleanup_queue; 1789 disk->private_data = h->drv[drv_index]; 1790 disk->driverfs_dev = &h->drv[drv_index]->dev; 1791 1792 /* Set up queue information */ 1793 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); 1794 1795 /* This is a hardware imposed limit. */ 1796 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES); 1797 1798 /* This is a limit in the driver and could be eliminated. */ 1799 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES); 1800 1801 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors); 1802 1803 blk_queue_softirq_done(disk->queue, cciss_softirq_done); 1804 1805 disk->queue->queuedata = h; 1806 1807 blk_queue_logical_block_size(disk->queue, 1808 h->drv[drv_index]->block_size); 1809 1810 /* Make sure all queue data is written out before */ 1811 /* setting h->drv[drv_index]->queue, as setting this */ 1812 /* allows the interrupt handler to start the queue */ 1813 wmb(); 1814 h->drv[drv_index]->queue = disk->queue; 1815 add_disk(disk); 1816 return 0; 1817 1818cleanup_queue: 1819 blk_cleanup_queue(disk->queue); 1820 disk->queue = NULL; 1821init_queue_failure: 1822 return -1; 1823} 1824 1825/* This function will check the usage_count of the drive to be updated/added. 1826 * If the usage_count is zero and it is a heretofore unknown drive, or, 1827 * the drive's capacity, geometry, or serial number has changed, 1828 * then the drive information will be updated and the disk will be 1829 * re-registered with the kernel. If these conditions don't hold, 1830 * then it will be left alone for the next reboot. The exception to this 1831 * is disk 0 which will always be left registered with the kernel since it 1832 * is also the controller node. Any changes to disk 0 will show up on 1833 * the next reboot. 1834 */ 1835static void cciss_update_drive_info(int ctlr, int drv_index, int first_time, 1836 int via_ioctl) 1837{ 1838 ctlr_info_t *h = hba[ctlr]; 1839 struct gendisk *disk; 1840 InquiryData_struct *inq_buff = NULL; 1841 unsigned int block_size; 1842 sector_t total_size; 1843 unsigned long flags = 0; 1844 int ret = 0; 1845 drive_info_struct *drvinfo; 1846 1847 /* Get information about the disk and modify the driver structure */ 1848 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1849 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL); 1850 if (inq_buff == NULL || drvinfo == NULL) 1851 goto mem_msg; 1852 1853 /* testing to see if 16-byte CDBs are already being used */ 1854 if (h->cciss_read == CCISS_READ_16) { 1855 cciss_read_capacity_16(h->ctlr, drv_index, 1, 1856 &total_size, &block_size); 1857 1858 } else { 1859 cciss_read_capacity(ctlr, drv_index, 1, 1860 &total_size, &block_size); 1861 1862 /* if read_capacity returns all F's this volume is >2TB */ 1863 /* in size so we switch to 16-byte CDB's for all */ 1864 /* read/write ops */ 1865 if (total_size == 0xFFFFFFFFULL) { 1866 cciss_read_capacity_16(ctlr, drv_index, 1, 1867 &total_size, &block_size); 1868 h->cciss_read = CCISS_READ_16; 1869 h->cciss_write = CCISS_WRITE_16; 1870 } else { 1871 h->cciss_read = CCISS_READ_10; 1872 h->cciss_write = CCISS_WRITE_10; 1873 } 1874 } 1875 1876 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size, 1877 inq_buff, drvinfo); 1878 drvinfo->block_size = block_size; 1879 drvinfo->nr_blocks = total_size + 1; 1880 1881 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor, 1882 drvinfo->model, drvinfo->rev); 1883 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no, 1884 sizeof(drvinfo->serial_no)); 1885 /* Save the lunid in case we deregister the disk, below. */ 1886 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID, 1887 sizeof(drvinfo->LunID)); 1888 1889 /* Is it the same disk we already know, and nothing's changed? */ 1890 if (h->drv[drv_index]->raid_level != -1 && 1891 ((memcmp(drvinfo->serial_no, 1892 h->drv[drv_index]->serial_no, 16) == 0) && 1893 drvinfo->block_size == h->drv[drv_index]->block_size && 1894 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks && 1895 drvinfo->heads == h->drv[drv_index]->heads && 1896 drvinfo->sectors == h->drv[drv_index]->sectors && 1897 drvinfo->cylinders == h->drv[drv_index]->cylinders)) 1898 /* The disk is unchanged, nothing to update */ 1899 goto freeret; 1900 1901 /* If we get here it's not the same disk, or something's changed, 1902 * so we need to * deregister it, and re-register it, if it's not 1903 * in use. 1904 * If the disk already exists then deregister it before proceeding 1905 * (unless it's the first disk (for the controller node). 1906 */ 1907 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) { 1908 printk(KERN_WARNING "disk %d has changed.\n", drv_index); 1909 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 1910 h->drv[drv_index]->busy_configuring = 1; 1911 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 1912 1913 /* deregister_disk sets h->drv[drv_index]->queue = NULL 1914 * which keeps the interrupt handler from starting 1915 * the queue. 1916 */ 1917 ret = deregister_disk(h, drv_index, 0, via_ioctl); 1918 } 1919 1920 /* If the disk is in use return */ 1921 if (ret) 1922 goto freeret; 1923 1924 /* Save the new information from cciss_geometry_inquiry 1925 * and serial number inquiry. If the disk was deregistered 1926 * above, then h->drv[drv_index] will be NULL. 1927 */ 1928 if (h->drv[drv_index] == NULL) { 1929 drvinfo->device_initialized = 0; 1930 h->drv[drv_index] = drvinfo; 1931 drvinfo = NULL; /* so it won't be freed below. */ 1932 } else { 1933 /* special case for cxd0 */ 1934 h->drv[drv_index]->block_size = drvinfo->block_size; 1935 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks; 1936 h->drv[drv_index]->heads = drvinfo->heads; 1937 h->drv[drv_index]->sectors = drvinfo->sectors; 1938 h->drv[drv_index]->cylinders = drvinfo->cylinders; 1939 h->drv[drv_index]->raid_level = drvinfo->raid_level; 1940 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16); 1941 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor, 1942 VENDOR_LEN + 1); 1943 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1); 1944 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1); 1945 } 1946 1947 ++h->num_luns; 1948 disk = h->gendisk[drv_index]; 1949 set_capacity(disk, h->drv[drv_index]->nr_blocks); 1950 1951 /* If it's not disk 0 (drv_index != 0) 1952 * or if it was disk 0, but there was previously 1953 * no actual corresponding configured logical drive 1954 * (raid_leve == -1) then we want to update the 1955 * logical drive's information. 1956 */ 1957 if (drv_index || first_time) { 1958 if (cciss_add_disk(h, disk, drv_index) != 0) { 1959 cciss_free_gendisk(h, drv_index); 1960 cciss_free_drive_info(h, drv_index); 1961 printk(KERN_WARNING "cciss:%d could not update " 1962 "disk %d\n", h->ctlr, drv_index); 1963 --h->num_luns; 1964 } 1965 } 1966 1967freeret: 1968 kfree(inq_buff); 1969 kfree(drvinfo); 1970 return; 1971mem_msg: 1972 printk(KERN_ERR "cciss: out of memory\n"); 1973 goto freeret; 1974} 1975 1976/* This function will find the first index of the controllers drive array 1977 * that has a null drv pointer and allocate the drive info struct and 1978 * will return that index This is where new drives will be added. 1979 * If the index to be returned is greater than the highest_lun index for 1980 * the controller then highest_lun is set * to this new index. 1981 * If there are no available indexes or if tha allocation fails, then -1 1982 * is returned. * "controller_node" is used to know if this is a real 1983 * logical drive, or just the controller node, which determines if this 1984 * counts towards highest_lun. 1985 */ 1986static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node) 1987{ 1988 int i; 1989 drive_info_struct *drv; 1990 1991 /* Search for an empty slot for our drive info */ 1992 for (i = 0; i < CISS_MAX_LUN; i++) { 1993 1994 /* if not cxd0 case, and it's occupied, skip it. */ 1995 if (h->drv[i] && i != 0) 1996 continue; 1997 /* 1998 * If it's cxd0 case, and drv is alloc'ed already, and a 1999 * disk is configured there, skip it. 2000 */ 2001 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1) 2002 continue; 2003 2004 /* 2005 * We've found an empty slot. Update highest_lun 2006 * provided this isn't just the fake cxd0 controller node. 2007 */ 2008 if (i > h->highest_lun && !controller_node) 2009 h->highest_lun = i; 2010 2011 /* If adding a real disk at cxd0, and it's already alloc'ed */ 2012 if (i == 0 && h->drv[i] != NULL) 2013 return i; 2014 2015 /* 2016 * Found an empty slot, not already alloc'ed. Allocate it. 2017 * Mark it with raid_level == -1, so we know it's new later on. 2018 */ 2019 drv = kzalloc(sizeof(*drv), GFP_KERNEL); 2020 if (!drv) 2021 return -1; 2022 drv->raid_level = -1; /* so we know it's new */ 2023 h->drv[i] = drv; 2024 return i; 2025 } 2026 return -1; 2027} 2028 2029static void cciss_free_drive_info(ctlr_info_t *h, int drv_index) 2030{ 2031 kfree(h->drv[drv_index]); 2032 h->drv[drv_index] = NULL; 2033} 2034 2035static void cciss_free_gendisk(ctlr_info_t *h, int drv_index) 2036{ 2037 put_disk(h->gendisk[drv_index]); 2038 h->gendisk[drv_index] = NULL; 2039} 2040 2041/* cciss_add_gendisk finds a free hba[]->drv structure 2042 * and allocates a gendisk if needed, and sets the lunid 2043 * in the drvinfo structure. It returns the index into 2044 * the ->drv[] array, or -1 if none are free. 2045 * is_controller_node indicates whether highest_lun should 2046 * count this disk, or if it's only being added to provide 2047 * a means to talk to the controller in case no logical 2048 * drives have yet been configured. 2049 */ 2050static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[], 2051 int controller_node) 2052{ 2053 int drv_index; 2054 2055 drv_index = cciss_alloc_drive_info(h, controller_node); 2056 if (drv_index == -1) 2057 return -1; 2058 2059 /*Check if the gendisk needs to be allocated */ 2060 if (!h->gendisk[drv_index]) { 2061 h->gendisk[drv_index] = 2062 alloc_disk(1 << NWD_SHIFT); 2063 if (!h->gendisk[drv_index]) { 2064 printk(KERN_ERR "cciss%d: could not " 2065 "allocate a new disk %d\n", 2066 h->ctlr, drv_index); 2067 goto err_free_drive_info; 2068 } 2069 } 2070 memcpy(h->drv[drv_index]->LunID, lunid, 2071 sizeof(h->drv[drv_index]->LunID)); 2072 if (cciss_create_ld_sysfs_entry(h, drv_index)) 2073 goto err_free_disk; 2074 /* Don't need to mark this busy because nobody */ 2075 /* else knows about this disk yet to contend */ 2076 /* for access to it. */ 2077 h->drv[drv_index]->busy_configuring = 0; 2078 wmb(); 2079 return drv_index; 2080 2081err_free_disk: 2082 cciss_free_gendisk(h, drv_index); 2083err_free_drive_info: 2084 cciss_free_drive_info(h, drv_index); 2085 return -1; 2086} 2087 2088/* This is for the special case of a controller which 2089 * has no logical drives. In this case, we still need 2090 * to register a disk so the controller can be accessed 2091 * by the Array Config Utility. 2092 */ 2093static void cciss_add_controller_node(ctlr_info_t *h) 2094{ 2095 struct gendisk *disk; 2096 int drv_index; 2097 2098 if (h->gendisk[0] != NULL) /* already did this? Then bail. */ 2099 return; 2100 2101 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1); 2102 if (drv_index == -1) 2103 goto error; 2104 h->drv[drv_index]->block_size = 512; 2105 h->drv[drv_index]->nr_blocks = 0; 2106 h->drv[drv_index]->heads = 0; 2107 h->drv[drv_index]->sectors = 0; 2108 h->drv[drv_index]->cylinders = 0; 2109 h->drv[drv_index]->raid_level = -1; 2110 memset(h->drv[drv_index]->serial_no, 0, 16); 2111 disk = h->gendisk[drv_index]; 2112 if (cciss_add_disk(h, disk, drv_index) == 0) 2113 return; 2114 cciss_free_gendisk(h, drv_index); 2115 cciss_free_drive_info(h, drv_index); 2116error: 2117 printk(KERN_WARNING "cciss%d: could not " 2118 "add disk 0.\n", h->ctlr); 2119 return; 2120} 2121 2122/* This function will add and remove logical drives from the Logical 2123 * drive array of the controller and maintain persistency of ordering 2124 * so that mount points are preserved until the next reboot. This allows 2125 * for the removal of logical drives in the middle of the drive array 2126 * without a re-ordering of those drives. 2127 * INPUT 2128 * h = The controller to perform the operations on 2129 */ 2130static int rebuild_lun_table(ctlr_info_t *h, int first_time, 2131 int via_ioctl) 2132{ 2133 int ctlr = h->ctlr; 2134 int num_luns; 2135 ReportLunData_struct *ld_buff = NULL; 2136 int return_code; 2137 int listlength = 0; 2138 int i; 2139 int drv_found; 2140 int drv_index = 0; 2141 unsigned char lunid[8] = CTLR_LUNID; 2142 unsigned long flags; 2143 2144 if (!capable(CAP_SYS_RAWIO)) 2145 return -EPERM; 2146 2147 /* Set busy_configuring flag for this operation */ 2148 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2149 if (h->busy_configuring) { 2150 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2151 return -EBUSY; 2152 } 2153 h->busy_configuring = 1; 2154 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2155 2156 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); 2157 if (ld_buff == NULL) 2158 goto mem_msg; 2159 2160 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff, 2161 sizeof(ReportLunData_struct), 2162 0, CTLR_LUNID, TYPE_CMD); 2163 2164 if (return_code == IO_OK) 2165 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); 2166 else { /* reading number of logical volumes failed */ 2167 printk(KERN_WARNING "cciss: report logical volume" 2168 " command failed\n"); 2169 listlength = 0; 2170 goto freeret; 2171 } 2172 2173 num_luns = listlength / 8; /* 8 bytes per entry */ 2174 if (num_luns > CISS_MAX_LUN) { 2175 num_luns = CISS_MAX_LUN; 2176 printk(KERN_WARNING "cciss: more luns configured" 2177 " on controller than can be handled by" 2178 " this driver.\n"); 2179 } 2180 2181 if (num_luns == 0) 2182 cciss_add_controller_node(h); 2183 2184 /* Compare controller drive array to driver's drive array 2185 * to see if any drives are missing on the controller due 2186 * to action of Array Config Utility (user deletes drive) 2187 * and deregister logical drives which have disappeared. 2188 */ 2189 for (i = 0; i <= h->highest_lun; i++) { 2190 int j; 2191 drv_found = 0; 2192 2193 /* skip holes in the array from already deleted drives */ 2194 if (h->drv[i] == NULL) 2195 continue; 2196 2197 for (j = 0; j < num_luns; j++) { 2198 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid)); 2199 if (memcmp(h->drv[i]->LunID, lunid, 2200 sizeof(lunid)) == 0) { 2201 drv_found = 1; 2202 break; 2203 } 2204 } 2205 if (!drv_found) { 2206 /* Deregister it from the OS, it's gone. */ 2207 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2208 h->drv[i]->busy_configuring = 1; 2209 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2210 return_code = deregister_disk(h, i, 1, via_ioctl); 2211 if (h->drv[i] != NULL) 2212 h->drv[i]->busy_configuring = 0; 2213 } 2214 } 2215 2216 /* Compare controller drive array to driver's drive array. 2217 * Check for updates in the drive information and any new drives 2218 * on the controller due to ACU adding logical drives, or changing 2219 * a logical drive's size, etc. Reregister any new/changed drives 2220 */ 2221 for (i = 0; i < num_luns; i++) { 2222 int j; 2223 2224 drv_found = 0; 2225 2226 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid)); 2227 /* Find if the LUN is already in the drive array 2228 * of the driver. If so then update its info 2229 * if not in use. If it does not exist then find 2230 * the first free index and add it. 2231 */ 2232 for (j = 0; j <= h->highest_lun; j++) { 2233 if (h->drv[j] != NULL && 2234 memcmp(h->drv[j]->LunID, lunid, 2235 sizeof(h->drv[j]->LunID)) == 0) { 2236 drv_index = j; 2237 drv_found = 1; 2238 break; 2239 } 2240 } 2241 2242 /* check if the drive was found already in the array */ 2243 if (!drv_found) { 2244 drv_index = cciss_add_gendisk(h, lunid, 0); 2245 if (drv_index == -1) 2246 goto freeret; 2247 } 2248 cciss_update_drive_info(ctlr, drv_index, first_time, 2249 via_ioctl); 2250 } /* end for */ 2251 2252freeret: 2253 kfree(ld_buff); 2254 h->busy_configuring = 0; 2255 /* We return -1 here to tell the ACU that we have registered/updated 2256 * all of the drives that we can and to keep it from calling us 2257 * additional times. 2258 */ 2259 return -1; 2260mem_msg: 2261 printk(KERN_ERR "cciss: out of memory\n"); 2262 h->busy_configuring = 0; 2263 goto freeret; 2264} 2265 2266static void cciss_clear_drive_info(drive_info_struct *drive_info) 2267{ 2268 /* zero out the disk size info */ 2269 drive_info->nr_blocks = 0; 2270 drive_info->block_size = 0; 2271 drive_info->heads = 0; 2272 drive_info->sectors = 0; 2273 drive_info->cylinders = 0; 2274 drive_info->raid_level = -1; 2275 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no)); 2276 memset(drive_info->model, 0, sizeof(drive_info->model)); 2277 memset(drive_info->rev, 0, sizeof(drive_info->rev)); 2278 memset(drive_info->vendor, 0, sizeof(drive_info->vendor)); 2279 /* 2280 * don't clear the LUNID though, we need to remember which 2281 * one this one is. 2282 */ 2283} 2284 2285/* This function will deregister the disk and it's queue from the 2286 * kernel. It must be called with the controller lock held and the 2287 * drv structures busy_configuring flag set. It's parameters are: 2288 * 2289 * disk = This is the disk to be deregistered 2290 * drv = This is the drive_info_struct associated with the disk to be 2291 * deregistered. It contains information about the disk used 2292 * by the driver. 2293 * clear_all = This flag determines whether or not the disk information 2294 * is going to be completely cleared out and the highest_lun 2295 * reset. Sometimes we want to clear out information about 2296 * the disk in preparation for re-adding it. In this case 2297 * the highest_lun should be left unchanged and the LunID 2298 * should not be cleared. 2299 * via_ioctl 2300 * This indicates whether we've reached this path via ioctl. 2301 * This affects the maximum usage count allowed for c0d0 to be messed with. 2302 * If this path is reached via ioctl(), then the max_usage_count will 2303 * be 1, as the process calling ioctl() has got to have the device open. 2304 * If we get here via sysfs, then the max usage count will be zero. 2305*/ 2306static int deregister_disk(ctlr_info_t *h, int drv_index, 2307 int clear_all, int via_ioctl) 2308{ 2309 int i; 2310 struct gendisk *disk; 2311 drive_info_struct *drv; 2312 int recalculate_highest_lun; 2313 2314 if (!capable(CAP_SYS_RAWIO)) 2315 return -EPERM; 2316 2317 drv = h->drv[drv_index]; 2318 disk = h->gendisk[drv_index]; 2319 2320 /* make sure logical volume is NOT is use */ 2321 if (clear_all || (h->gendisk[0] == disk)) { 2322 if (drv->usage_count > via_ioctl) 2323 return -EBUSY; 2324 } else if (drv->usage_count > 0) 2325 return -EBUSY; 2326 2327 recalculate_highest_lun = (drv == h->drv[h->highest_lun]); 2328 2329 /* invalidate the devices and deregister the disk. If it is disk 2330 * zero do not deregister it but just zero out it's values. This 2331 * allows us to delete disk zero but keep the controller registered. 2332 */ 2333 if (h->gendisk[0] != disk) { 2334 struct request_queue *q = disk->queue; 2335 if (disk->flags & GENHD_FL_UP) { 2336 cciss_destroy_ld_sysfs_entry(h, drv_index, 0); 2337 del_gendisk(disk); 2338 } 2339 if (q) 2340 blk_cleanup_queue(q); 2341 /* If clear_all is set then we are deleting the logical 2342 * drive, not just refreshing its info. For drives 2343 * other than disk 0 we will call put_disk. We do not 2344 * do this for disk 0 as we need it to be able to 2345 * configure the controller. 2346 */ 2347 if (clear_all){ 2348 /* This isn't pretty, but we need to find the 2349 * disk in our array and NULL our the pointer. 2350 * This is so that we will call alloc_disk if 2351 * this index is used again later. 2352 */ 2353 for (i=0; i < CISS_MAX_LUN; i++){ 2354 if (h->gendisk[i] == disk) { 2355 h->gendisk[i] = NULL; 2356 break; 2357 } 2358 } 2359 put_disk(disk); 2360 } 2361 } else { 2362 set_capacity(disk, 0); 2363 cciss_clear_drive_info(drv); 2364 } 2365 2366 --h->num_luns; 2367 2368 /* if it was the last disk, find the new hightest lun */ 2369 if (clear_all && recalculate_highest_lun) { 2370 int i, newhighest = -1; 2371 for (i = 0; i <= h->highest_lun; i++) { 2372 /* if the disk has size > 0, it is available */ 2373 if (h->drv[i] && h->drv[i]->heads) 2374 newhighest = i; 2375 } 2376 h->highest_lun = newhighest; 2377 } 2378 return 0; 2379} 2380 2381static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, 2382 size_t size, __u8 page_code, unsigned char *scsi3addr, 2383 int cmd_type) 2384{ 2385 ctlr_info_t *h = hba[ctlr]; 2386 u64bit buff_dma_handle; 2387 int status = IO_OK; 2388 2389 c->cmd_type = CMD_IOCTL_PEND; 2390 c->Header.ReplyQueue = 0; 2391 if (buff != NULL) { 2392 c->Header.SGList = 1; 2393 c->Header.SGTotal = 1; 2394 } else { 2395 c->Header.SGList = 0; 2396 c->Header.SGTotal = 0; 2397 } 2398 c->Header.Tag.lower = c->busaddr; 2399 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); 2400 2401 c->Request.Type.Type = cmd_type; 2402 if (cmd_type == TYPE_CMD) { 2403 switch (cmd) { 2404 case CISS_INQUIRY: 2405 /* are we trying to read a vital product page */ 2406 if (page_code != 0) { 2407 c->Request.CDB[1] = 0x01; 2408 c->Request.CDB[2] = page_code; 2409 } 2410 c->Request.CDBLen = 6; 2411 c->Request.Type.Attribute = ATTR_SIMPLE; 2412 c->Request.Type.Direction = XFER_READ; 2413 c->Request.Timeout = 0; 2414 c->Request.CDB[0] = CISS_INQUIRY; 2415 c->Request.CDB[4] = size & 0xFF; 2416 break; 2417 case CISS_REPORT_LOG: 2418 case CISS_REPORT_PHYS: 2419 /* Talking to controller so It's a physical command 2420 mode = 00 target = 0. Nothing to write. 2421 */ 2422 c->Request.CDBLen = 12; 2423 c->Request.Type.Attribute = ATTR_SIMPLE; 2424 c->Request.Type.Direction = XFER_READ; 2425 c->Request.Timeout = 0; 2426 c->Request.CDB[0] = cmd; 2427 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB 2428 c->Request.CDB[7] = (size >> 16) & 0xFF; 2429 c->Request.CDB[8] = (size >> 8) & 0xFF; 2430 c->Request.CDB[9] = size & 0xFF; 2431 break; 2432 2433 case CCISS_READ_CAPACITY: 2434 c->Request.CDBLen = 10; 2435 c->Request.Type.Attribute = ATTR_SIMPLE; 2436 c->Request.Type.Direction = XFER_READ; 2437 c->Request.Timeout = 0; 2438 c->Request.CDB[0] = cmd; 2439 break; 2440 case CCISS_READ_CAPACITY_16: 2441 c->Request.CDBLen = 16; 2442 c->Request.Type.Attribute = ATTR_SIMPLE; 2443 c->Request.Type.Direction = XFER_READ; 2444 c->Request.Timeout = 0; 2445 c->Request.CDB[0] = cmd; 2446 c->Request.CDB[1] = 0x10; 2447 c->Request.CDB[10] = (size >> 24) & 0xFF; 2448 c->Request.CDB[11] = (size >> 16) & 0xFF; 2449 c->Request.CDB[12] = (size >> 8) & 0xFF; 2450 c->Request.CDB[13] = size & 0xFF; 2451 c->Request.Timeout = 0; 2452 c->Request.CDB[0] = cmd; 2453 break; 2454 case CCISS_CACHE_FLUSH: 2455 c->Request.CDBLen = 12; 2456 c->Request.Type.Attribute = ATTR_SIMPLE; 2457 c->Request.Type.Direction = XFER_WRITE; 2458 c->Request.Timeout = 0; 2459 c->Request.CDB[0] = BMIC_WRITE; 2460 c->Request.CDB[6] = BMIC_CACHE_FLUSH; 2461 break; 2462 case TEST_UNIT_READY: 2463 c->Request.CDBLen = 6; 2464 c->Request.Type.Attribute = ATTR_SIMPLE; 2465 c->Request.Type.Direction = XFER_NONE; 2466 c->Request.Timeout = 0; 2467 break; 2468 default: 2469 printk(KERN_WARNING 2470 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd); 2471 return IO_ERROR; 2472 } 2473 } else if (cmd_type == TYPE_MSG) { 2474 switch (cmd) { 2475 case 0: /* ABORT message */ 2476 c->Request.CDBLen = 12; 2477 c->Request.Type.Attribute = ATTR_SIMPLE; 2478 c->Request.Type.Direction = XFER_WRITE; 2479 c->Request.Timeout = 0; 2480 c->Request.CDB[0] = cmd; /* abort */ 2481 c->Request.CDB[1] = 0; /* abort a command */ 2482 /* buff contains the tag of the command to abort */ 2483 memcpy(&c->Request.CDB[4], buff, 8); 2484 break; 2485 case 1: /* RESET message */ 2486 c->Request.CDBLen = 16; 2487 c->Request.Type.Attribute = ATTR_SIMPLE; 2488 c->Request.Type.Direction = XFER_NONE; 2489 c->Request.Timeout = 0; 2490 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); 2491 c->Request.CDB[0] = cmd; /* reset */ 2492 c->Request.CDB[1] = 0x03; /* reset a target */ 2493 break; 2494 case 3: /* No-Op message */ 2495 c->Request.CDBLen = 1; 2496 c->Request.Type.Attribute = ATTR_SIMPLE; 2497 c->Request.Type.Direction = XFER_WRITE; 2498 c->Request.Timeout = 0; 2499 c->Request.CDB[0] = cmd; 2500 break; 2501 default: 2502 printk(KERN_WARNING 2503 "cciss%d: unknown message type %d\n", ctlr, cmd); 2504 return IO_ERROR; 2505 } 2506 } else { 2507 printk(KERN_WARNING 2508 "cciss%d: unknown command type %d\n", ctlr, cmd_type); 2509 return IO_ERROR; 2510 } 2511 /* Fill in the scatter gather information */ 2512 if (size > 0) { 2513 buff_dma_handle.val = (__u64) pci_map_single(h->pdev, 2514 buff, size, 2515 PCI_DMA_BIDIRECTIONAL); 2516 c->SG[0].Addr.lower = buff_dma_handle.val32.lower; 2517 c->SG[0].Addr.upper = buff_dma_handle.val32.upper; 2518 c->SG[0].Len = size; 2519 c->SG[0].Ext = 0; /* we are not chaining */ 2520 } 2521 return status; 2522} 2523 2524static int check_target_status(ctlr_info_t *h, CommandList_struct *c) 2525{ 2526 switch (c->err_info->ScsiStatus) { 2527 case SAM_STAT_GOOD: 2528 return IO_OK; 2529 case SAM_STAT_CHECK_CONDITION: 2530 switch (0xf & c->err_info->SenseInfo[2]) { 2531 case 0: return IO_OK; /* no sense */ 2532 case 1: return IO_OK; /* recovered error */ 2533 default: 2534 printk(KERN_WARNING "cciss%d: cmd 0x%02x " 2535 "check condition, sense key = 0x%02x\n", 2536 h->ctlr, c->Request.CDB[0], 2537 c->err_info->SenseInfo[2]); 2538 } 2539 break; 2540 default: 2541 printk(KERN_WARNING "cciss%d: cmd 0x%02x" 2542 "scsi status = 0x%02x\n", h->ctlr, 2543 c->Request.CDB[0], c->err_info->ScsiStatus); 2544 break; 2545 } 2546 return IO_ERROR; 2547} 2548 2549static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c) 2550{ 2551 int return_status = IO_OK; 2552 2553 if (c->err_info->CommandStatus == CMD_SUCCESS) 2554 return IO_OK; 2555 2556 switch (c->err_info->CommandStatus) { 2557 case CMD_TARGET_STATUS: 2558 return_status = check_target_status(h, c); 2559 break; 2560 case CMD_DATA_UNDERRUN: 2561 case CMD_DATA_OVERRUN: 2562 /* expected for inquiry and report lun commands */ 2563 break; 2564 case CMD_INVALID: 2565 printk(KERN_WARNING "cciss: cmd 0x%02x is " 2566 "reported invalid\n", c->Request.CDB[0]); 2567 return_status = IO_ERROR; 2568 break; 2569 case CMD_PROTOCOL_ERR: 2570 printk(KERN_WARNING "cciss: cmd 0x%02x has " 2571 "protocol error \n", c->Request.CDB[0]); 2572 return_status = IO_ERROR; 2573 break; 2574 case CMD_HARDWARE_ERR: 2575 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2576 " hardware error\n", c->Request.CDB[0]); 2577 return_status = IO_ERROR; 2578 break; 2579 case CMD_CONNECTION_LOST: 2580 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2581 "connection lost\n", c->Request.CDB[0]); 2582 return_status = IO_ERROR; 2583 break; 2584 case CMD_ABORTED: 2585 printk(KERN_WARNING "cciss: cmd 0x%02x was " 2586 "aborted\n", c->Request.CDB[0]); 2587 return_status = IO_ERROR; 2588 break; 2589 case CMD_ABORT_FAILED: 2590 printk(KERN_WARNING "cciss: cmd 0x%02x reports " 2591 "abort failed\n", c->Request.CDB[0]); 2592 return_status = IO_ERROR; 2593 break; 2594 case CMD_UNSOLICITED_ABORT: 2595 printk(KERN_WARNING 2596 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr, 2597 c->Request.CDB[0]); 2598 return_status = IO_NEEDS_RETRY; 2599 break; 2600 default: 2601 printk(KERN_WARNING "cciss: cmd 0x%02x returned " 2602 "unknown status %x\n", c->Request.CDB[0], 2603 c->err_info->CommandStatus); 2604 return_status = IO_ERROR; 2605 } 2606 return return_status; 2607} 2608 2609static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 2610 int attempt_retry) 2611{ 2612 DECLARE_COMPLETION_ONSTACK(wait); 2613 u64bit buff_dma_handle; 2614 unsigned long flags; 2615 int return_status = IO_OK; 2616 2617resend_cmd2: 2618 c->waiting = &wait; 2619 /* Put the request on the tail of the queue and send it */ 2620 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2621 addQ(&h->reqQ, c); 2622 h->Qdepth++; 2623 start_io(h); 2624 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2625 2626 wait_for_completion(&wait); 2627 2628 if (c->err_info->CommandStatus == 0 || !attempt_retry) 2629 goto command_done; 2630 2631 return_status = process_sendcmd_error(h, c); 2632 2633 if (return_status == IO_NEEDS_RETRY && 2634 c->retry_count < MAX_CMD_RETRIES) { 2635 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr, 2636 c->Request.CDB[0]); 2637 c->retry_count++; 2638 /* erase the old error information */ 2639 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 2640 return_status = IO_OK; 2641 INIT_COMPLETION(wait); 2642 goto resend_cmd2; 2643 } 2644 2645command_done: 2646 /* unlock the buffers from DMA */ 2647 buff_dma_handle.val32.lower = c->SG[0].Addr.lower; 2648 buff_dma_handle.val32.upper = c->SG[0].Addr.upper; 2649 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, 2650 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); 2651 return return_status; 2652} 2653 2654static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 2655 __u8 page_code, unsigned char scsi3addr[], 2656 int cmd_type) 2657{ 2658 ctlr_info_t *h = hba[ctlr]; 2659 CommandList_struct *c; 2660 int return_status; 2661 2662 c = cmd_alloc(h, 0); 2663 if (!c) 2664 return -ENOMEM; 2665 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code, 2666 scsi3addr, cmd_type); 2667 if (return_status == IO_OK) 2668 return_status = sendcmd_withirq_core(h, c, 1); 2669 2670 cmd_free(h, c, 0); 2671 return return_status; 2672} 2673 2674static void cciss_geometry_inquiry(int ctlr, int logvol, 2675 int withirq, sector_t total_size, 2676 unsigned int block_size, 2677 InquiryData_struct *inq_buff, 2678 drive_info_struct *drv) 2679{ 2680 int return_code; 2681 unsigned long t; 2682 unsigned char scsi3addr[8]; 2683 2684 memset(inq_buff, 0, sizeof(InquiryData_struct)); 2685 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2686 if (withirq) 2687 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, 2688 inq_buff, sizeof(*inq_buff), 2689 0xC1, scsi3addr, TYPE_CMD); 2690 else 2691 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff, 2692 sizeof(*inq_buff), 0xC1, scsi3addr, 2693 TYPE_CMD); 2694 if (return_code == IO_OK) { 2695 if (inq_buff->data_byte[8] == 0xFF) { 2696 printk(KERN_WARNING 2697 "cciss: reading geometry failed, volume " 2698 "does not support reading geometry\n"); 2699 drv->heads = 255; 2700 drv->sectors = 32; // Sectors per track 2701 drv->cylinders = total_size + 1; 2702 drv->raid_level = RAID_UNKNOWN; 2703 } else { 2704 drv->heads = inq_buff->data_byte[6]; 2705 drv->sectors = inq_buff->data_byte[7]; 2706 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8; 2707 drv->cylinders += inq_buff->data_byte[5]; 2708 drv->raid_level = inq_buff->data_byte[8]; 2709 } 2710 drv->block_size = block_size; 2711 drv->nr_blocks = total_size + 1; 2712 t = drv->heads * drv->sectors; 2713 if (t > 1) { 2714 sector_t real_size = total_size + 1; 2715 unsigned long rem = sector_div(real_size, t); 2716 if (rem) 2717 real_size++; 2718 drv->cylinders = real_size; 2719 } 2720 } else { /* Get geometry failed */ 2721 printk(KERN_WARNING "cciss: reading geometry failed\n"); 2722 } 2723} 2724 2725static void 2726cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size, 2727 unsigned int *block_size) 2728{ 2729 ReadCapdata_struct *buf; 2730 int return_code; 2731 unsigned char scsi3addr[8]; 2732 2733 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL); 2734 if (!buf) { 2735 printk(KERN_WARNING "cciss: out of memory\n"); 2736 return; 2737 } 2738 2739 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2740 if (withirq) 2741 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, 2742 ctlr, buf, sizeof(ReadCapdata_struct), 2743 0, scsi3addr, TYPE_CMD); 2744 else 2745 return_code = sendcmd(CCISS_READ_CAPACITY, 2746 ctlr, buf, sizeof(ReadCapdata_struct), 2747 0, scsi3addr, TYPE_CMD); 2748 if (return_code == IO_OK) { 2749 *total_size = be32_to_cpu(*(__be32 *) buf->total_size); 2750 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2751 } else { /* read capacity command failed */ 2752 printk(KERN_WARNING "cciss: read capacity failed\n"); 2753 *total_size = 0; 2754 *block_size = BLOCK_SIZE; 2755 } 2756 kfree(buf); 2757} 2758 2759static void 2760cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size) 2761{ 2762 ReadCapdata_struct_16 *buf; 2763 int return_code; 2764 unsigned char scsi3addr[8]; 2765 2766 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL); 2767 if (!buf) { 2768 printk(KERN_WARNING "cciss: out of memory\n"); 2769 return; 2770 } 2771 2772 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2773 if (withirq) { 2774 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16, 2775 ctlr, buf, sizeof(ReadCapdata_struct_16), 2776 0, scsi3addr, TYPE_CMD); 2777 } 2778 else { 2779 return_code = sendcmd(CCISS_READ_CAPACITY_16, 2780 ctlr, buf, sizeof(ReadCapdata_struct_16), 2781 0, scsi3addr, TYPE_CMD); 2782 } 2783 if (return_code == IO_OK) { 2784 *total_size = be64_to_cpu(*(__be64 *) buf->total_size); 2785 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2786 } else { /* read capacity command failed */ 2787 printk(KERN_WARNING "cciss: read capacity failed\n"); 2788 *total_size = 0; 2789 *block_size = BLOCK_SIZE; 2790 } 2791 printk(KERN_INFO " blocks= %llu block_size= %d\n", 2792 (unsigned long long)*total_size+1, *block_size); 2793 kfree(buf); 2794} 2795 2796static int cciss_revalidate(struct gendisk *disk) 2797{ 2798 ctlr_info_t *h = get_host(disk); 2799 drive_info_struct *drv = get_drv(disk); 2800 int logvol; 2801 int FOUND = 0; 2802 unsigned int block_size; 2803 sector_t total_size; 2804 InquiryData_struct *inq_buff = NULL; 2805 2806 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { 2807 if (memcmp(h->drv[logvol]->LunID, drv->LunID, 2808 sizeof(drv->LunID)) == 0) { 2809 FOUND = 1; 2810 break; 2811 } 2812 } 2813 2814 if (!FOUND) 2815 return 1; 2816 2817 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 2818 if (inq_buff == NULL) { 2819 printk(KERN_WARNING "cciss: out of memory\n"); 2820 return 1; 2821 } 2822 if (h->cciss_read == CCISS_READ_10) { 2823 cciss_read_capacity(h->ctlr, logvol, 1, 2824 &total_size, &block_size); 2825 } else { 2826 cciss_read_capacity_16(h->ctlr, logvol, 1, 2827 &total_size, &block_size); 2828 } 2829 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size, 2830 inq_buff, drv); 2831 2832 blk_queue_logical_block_size(drv->queue, drv->block_size); 2833 set_capacity(disk, drv->nr_blocks); 2834 2835 kfree(inq_buff); 2836 return 0; 2837} 2838 2839/* 2840 * Wait polling for a command to complete. 2841 * The memory mapped FIFO is polled for the completion. 2842 * Used only at init time, interrupts from the HBA are disabled. 2843 */ 2844static unsigned long pollcomplete(int ctlr) 2845{ 2846 unsigned long done; 2847 int i; 2848 2849 /* Wait (up to 20 seconds) for a command to complete */ 2850 2851 for (i = 20 * HZ; i > 0; i--) { 2852 done = hba[ctlr]->access.command_completed(hba[ctlr]); 2853 if (done == FIFO_EMPTY) 2854 schedule_timeout_uninterruptible(1); 2855 else 2856 return done; 2857 } 2858 /* Invalid address to tell caller we ran out of time */ 2859 return 1; 2860} 2861 2862/* Send command c to controller h and poll for it to complete. 2863 * Turns interrupts off on the board. Used at driver init time 2864 * and during SCSI error recovery. 2865 */ 2866static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c) 2867{ 2868 int i; 2869 unsigned long complete; 2870 int status = IO_ERROR; 2871 u64bit buff_dma_handle; 2872 2873resend_cmd1: 2874 2875 /* Disable interrupt on the board. */ 2876 h->access.set_intr_mask(h, CCISS_INTR_OFF); 2877 2878 /* Make sure there is room in the command FIFO */ 2879 /* Actually it should be completely empty at this time */ 2880 /* unless we are in here doing error handling for the scsi */ 2881 /* tape side of the driver. */ 2882 for (i = 200000; i > 0; i--) { 2883 /* if fifo isn't full go */ 2884 if (!(h->access.fifo_full(h))) 2885 break; 2886 udelay(10); 2887 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full," 2888 " waiting!\n", h->ctlr); 2889 } 2890 h->access.submit_command(h, c); /* Send the cmd */ 2891 do { 2892 complete = pollcomplete(h->ctlr); 2893 2894#ifdef CCISS_DEBUG 2895 printk(KERN_DEBUG "cciss: command completed\n"); 2896#endif /* CCISS_DEBUG */ 2897 2898 if (complete == 1) { 2899 printk(KERN_WARNING 2900 "cciss cciss%d: SendCmd Timeout out, " 2901 "No command list address returned!\n", h->ctlr); 2902 status = IO_ERROR; 2903 break; 2904 } 2905 2906 /* Make sure it's the command we're expecting. */ 2907 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) { 2908 printk(KERN_WARNING "cciss%d: Unexpected command " 2909 "completion.\n", h->ctlr); 2910 continue; 2911 } 2912 2913 /* It is our command. If no error, we're done. */ 2914 if (!(complete & CISS_ERROR_BIT)) { 2915 status = IO_OK; 2916 break; 2917 } 2918 2919 /* There is an error... */ 2920 2921 /* if data overrun or underun on Report command ignore it */ 2922 if (((c->Request.CDB[0] == CISS_REPORT_LOG) || 2923 (c->Request.CDB[0] == CISS_REPORT_PHYS) || 2924 (c->Request.CDB[0] == CISS_INQUIRY)) && 2925 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) || 2926 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) { 2927 complete = c->busaddr; 2928 status = IO_OK; 2929 break; 2930 } 2931 2932 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) { 2933 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n", 2934 h->ctlr, c); 2935 if (c->retry_count < MAX_CMD_RETRIES) { 2936 printk(KERN_WARNING "cciss%d: retrying %p\n", 2937 h->ctlr, c); 2938 c->retry_count++; 2939 /* erase the old error information */ 2940 memset(c->err_info, 0, sizeof(c->err_info)); 2941 goto resend_cmd1; 2942 } 2943 printk(KERN_WARNING "cciss%d: retried %p too many " 2944 "times\n", h->ctlr, c); 2945 status = IO_ERROR; 2946 break; 2947 } 2948 2949 if (c->err_info->CommandStatus == CMD_UNABORTABLE) { 2950 printk(KERN_WARNING "cciss%d: command could not be " 2951 "aborted.\n", h->ctlr); 2952 status = IO_ERROR; 2953 break; 2954 } 2955 2956 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) { 2957 status = check_target_status(h, c); 2958 break; 2959 } 2960 2961 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr); 2962 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n", 2963 c->Request.CDB[0], c->err_info->CommandStatus); 2964 status = IO_ERROR; 2965 break; 2966 2967 } while (1); 2968 2969 /* unlock the data buffer from DMA */ 2970 buff_dma_handle.val32.lower = c->SG[0].Addr.lower; 2971 buff_dma_handle.val32.upper = c->SG[0].Addr.upper; 2972 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, 2973 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); 2974 return status; 2975} 2976 2977/* 2978 * Send a command to the controller, and wait for it to complete. 2979 * Used at init time, and during SCSI error recovery. 2980 */ 2981static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, 2982 __u8 page_code, unsigned char *scsi3addr, int cmd_type) 2983{ 2984 CommandList_struct *c; 2985 int status; 2986 2987 c = cmd_alloc(hba[ctlr], 1); 2988 if (!c) { 2989 printk(KERN_WARNING "cciss: unable to get memory"); 2990 return IO_ERROR; 2991 } 2992 status = fill_cmd(c, cmd, ctlr, buff, size, page_code, 2993 scsi3addr, cmd_type); 2994 if (status == IO_OK) 2995 status = sendcmd_core(hba[ctlr], c); 2996 cmd_free(hba[ctlr], c, 1); 2997 return status; 2998} 2999 3000/* 3001 * Map (physical) PCI mem into (virtual) kernel space 3002 */ 3003static void __iomem *remap_pci_mem(ulong base, ulong size) 3004{ 3005 ulong page_base = ((ulong) base) & PAGE_MASK; 3006 ulong page_offs = ((ulong) base) - page_base; 3007 void __iomem *page_remapped = ioremap(page_base, page_offs + size); 3008 3009 return page_remapped ? (page_remapped + page_offs) : NULL; 3010} 3011 3012/* 3013 * Takes jobs of the Q and sends them to the hardware, then puts it on 3014 * the Q to wait for completion. 3015 */ 3016static void start_io(ctlr_info_t *h) 3017{ 3018 CommandList_struct *c; 3019 3020 while (!hlist_empty(&h->reqQ)) { 3021 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 3022 /* can't do anything if fifo is full */ 3023 if ((h->access.fifo_full(h))) { 3024 printk(KERN_WARNING "cciss: fifo full\n"); 3025 break; 3026 } 3027 3028 /* Get the first entry from the Request Q */ 3029 removeQ(c); 3030 h->Qdepth--; 3031 3032 /* Tell the controller execute command */ 3033 h->access.submit_command(h, c); 3034 3035 /* Put job onto the completed Q */ 3036 addQ(&h->cmpQ, c); 3037 } 3038} 3039 3040/* Assumes that CCISS_LOCK(h->ctlr) is held. */ 3041/* Zeros out the error record and then resends the command back */ 3042/* to the controller */ 3043static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c) 3044{ 3045 /* erase the old error information */ 3046 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 3047 3048 /* add it to software queue and then send it to the controller */ 3049 addQ(&h->reqQ, c); 3050 h->Qdepth++; 3051 if (h->Qdepth > h->maxQsinceinit) 3052 h->maxQsinceinit = h->Qdepth; 3053 3054 start_io(h); 3055} 3056 3057static inline unsigned int make_status_bytes(unsigned int scsi_status_byte, 3058 unsigned int msg_byte, unsigned int host_byte, 3059 unsigned int driver_byte) 3060{ 3061 /* inverse of macros in scsi.h */ 3062 return (scsi_status_byte & 0xff) | 3063 ((msg_byte & 0xff) << 8) | 3064 ((host_byte & 0xff) << 16) | 3065 ((driver_byte & 0xff) << 24); 3066} 3067 3068static inline int evaluate_target_status(ctlr_info_t *h, 3069 CommandList_struct *cmd, int *retry_cmd) 3070{ 3071 unsigned char sense_key; 3072 unsigned char status_byte, msg_byte, host_byte, driver_byte; 3073 int error_value; 3074 3075 *retry_cmd = 0; 3076 /* If we get in here, it means we got "target status", that is, scsi status */ 3077 status_byte = cmd->err_info->ScsiStatus; 3078 driver_byte = DRIVER_OK; 3079 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */ 3080 3081 if (blk_pc_request(cmd->rq)) 3082 host_byte = DID_PASSTHROUGH; 3083 else 3084 host_byte = DID_OK; 3085 3086 error_value = make_status_bytes(status_byte, msg_byte, 3087 host_byte, driver_byte); 3088 3089 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) { 3090 if (!blk_pc_request(cmd->rq)) 3091 printk(KERN_WARNING "cciss: cmd %p " 3092 "has SCSI Status 0x%x\n", 3093 cmd, cmd->err_info->ScsiStatus); 3094 return error_value; 3095 } 3096 3097 /* check the sense key */ 3098 sense_key = 0xf & cmd->err_info->SenseInfo[2]; 3099 /* no status or recovered error */ 3100 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq)) 3101 error_value = 0; 3102 3103 if (check_for_unit_attention(h, cmd)) { 3104 *retry_cmd = !blk_pc_request(cmd->rq); 3105 return 0; 3106 } 3107 3108 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */ 3109 if (error_value != 0) 3110 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION" 3111 " sense key = 0x%x\n", cmd, sense_key); 3112 return error_value; 3113 } 3114 3115 /* SG_IO or similar, copy sense data back */ 3116 if (cmd->rq->sense) { 3117 if (cmd->rq->sense_len > cmd->err_info->SenseLen) 3118 cmd->rq->sense_len = cmd->err_info->SenseLen; 3119 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo, 3120 cmd->rq->sense_len); 3121 } else 3122 cmd->rq->sense_len = 0; 3123 3124 return error_value; 3125} 3126 3127/* checks the status of the job and calls complete buffers to mark all 3128 * buffers for the completed job. Note that this function does not need 3129 * to hold the hba/queue lock. 3130 */ 3131static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd, 3132 int timeout) 3133{ 3134 int retry_cmd = 0; 3135 struct request *rq = cmd->rq; 3136 3137 rq->errors = 0; 3138 3139 if (timeout) 3140 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT); 3141 3142 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */ 3143 goto after_error_processing; 3144 3145 switch (cmd->err_info->CommandStatus) { 3146 case CMD_TARGET_STATUS: 3147 rq->errors = evaluate_target_status(h, cmd, &retry_cmd); 3148 break; 3149 case CMD_DATA_UNDERRUN: 3150 if (blk_fs_request(cmd->rq)) { 3151 printk(KERN_WARNING "cciss: cmd %p has" 3152 " completed with data underrun " 3153 "reported\n", cmd); 3154 cmd->rq->resid_len = cmd->err_info->ResidualCnt; 3155 } 3156 break; 3157 case CMD_DATA_OVERRUN: 3158 if (blk_fs_request(cmd->rq)) 3159 printk(KERN_WARNING "cciss: cmd %p has" 3160 " completed with data overrun " 3161 "reported\n", cmd); 3162 break; 3163 case CMD_INVALID: 3164 printk(KERN_WARNING "cciss: cmd %p is " 3165 "reported invalid\n", cmd); 3166 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3167 cmd->err_info->CommandStatus, DRIVER_OK, 3168 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3169 break; 3170 case CMD_PROTOCOL_ERR: 3171 printk(KERN_WARNING "cciss: cmd %p has " 3172 "protocol error \n", cmd); 3173 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3174 cmd->err_info->CommandStatus, DRIVER_OK, 3175 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3176 break; 3177 case CMD_HARDWARE_ERR: 3178 printk(KERN_WARNING "cciss: cmd %p had " 3179 " hardware error\n", cmd); 3180 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3181 cmd->err_info->CommandStatus, DRIVER_OK, 3182 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3183 break; 3184 case CMD_CONNECTION_LOST: 3185 printk(KERN_WARNING "cciss: cmd %p had " 3186 "connection lost\n", cmd); 3187 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3188 cmd->err_info->CommandStatus, DRIVER_OK, 3189 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3190 break; 3191 case CMD_ABORTED: 3192 printk(KERN_WARNING "cciss: cmd %p was " 3193 "aborted\n", cmd); 3194 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3195 cmd->err_info->CommandStatus, DRIVER_OK, 3196 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); 3197 break; 3198 case CMD_ABORT_FAILED: 3199 printk(KERN_WARNING "cciss: cmd %p reports " 3200 "abort failed\n", cmd); 3201 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3202 cmd->err_info->CommandStatus, DRIVER_OK, 3203 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3204 break; 3205 case CMD_UNSOLICITED_ABORT: 3206 printk(KERN_WARNING "cciss%d: unsolicited " 3207 "abort %p\n", h->ctlr, cmd); 3208 if (cmd->retry_count < MAX_CMD_RETRIES) { 3209 retry_cmd = 1; 3210 printk(KERN_WARNING 3211 "cciss%d: retrying %p\n", h->ctlr, cmd); 3212 cmd->retry_count++; 3213 } else 3214 printk(KERN_WARNING 3215 "cciss%d: %p retried too " 3216 "many times\n", h->ctlr, cmd); 3217 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3218 cmd->err_info->CommandStatus, DRIVER_OK, 3219 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); 3220 break; 3221 case CMD_TIMEOUT: 3222 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd); 3223 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3224 cmd->err_info->CommandStatus, DRIVER_OK, 3225 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3226 break; 3227 default: 3228 printk(KERN_WARNING "cciss: cmd %p returned " 3229 "unknown status %x\n", cmd, 3230 cmd->err_info->CommandStatus); 3231 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3232 cmd->err_info->CommandStatus, DRIVER_OK, 3233 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3234 } 3235 3236after_error_processing: 3237 3238 /* We need to return this command */ 3239 if (retry_cmd) { 3240 resend_cciss_cmd(h, cmd); 3241 return; 3242 } 3243 cmd->rq->completion_data = cmd; 3244 blk_complete_request(cmd->rq); 3245} 3246 3247/* 3248 * Get a request and submit it to the controller. 3249 */ 3250static void do_cciss_request(struct request_queue *q) 3251{ 3252 ctlr_info_t *h = q->queuedata; 3253 CommandList_struct *c; 3254 sector_t start_blk; 3255 int seg; 3256 struct request *creq; 3257 u64bit temp64; 3258 struct scatterlist tmp_sg[MAXSGENTRIES]; 3259 drive_info_struct *drv; 3260 int i, dir; 3261 3262 /* We call start_io here in case there is a command waiting on the 3263 * queue that has not been sent. 3264 */ 3265 if (blk_queue_plugged(q)) 3266 goto startio; 3267 3268 queue: 3269 creq = blk_peek_request(q); 3270 if (!creq) 3271 goto startio; 3272 3273 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES); 3274 3275 if ((c = cmd_alloc(h, 1)) == NULL) 3276 goto full; 3277 3278 blk_start_request(creq); 3279 3280 spin_unlock_irq(q->queue_lock); 3281 3282 c->cmd_type = CMD_RWREQ; 3283 c->rq = creq; 3284 3285 /* fill in the request */ 3286 drv = creq->rq_disk->private_data; 3287 c->Header.ReplyQueue = 0; // unused in simple mode 3288 /* got command from pool, so use the command block index instead */ 3289 /* for direct lookups. */ 3290 /* The first 2 bits are reserved for controller error reporting. */ 3291 c->Header.Tag.lower = (c->cmdindex << 3); 3292 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */ 3293 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID)); 3294 c->Request.CDBLen = 10; // 12 byte commands not in FW yet; 3295 c->Request.Type.Type = TYPE_CMD; // It is a command. 3296 c->Request.Type.Attribute = ATTR_SIMPLE; 3297 c->Request.Type.Direction = 3298 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE; 3299 c->Request.Timeout = 0; // Don't time out 3300 c->Request.CDB[0] = 3301 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write; 3302 start_blk = blk_rq_pos(creq); 3303#ifdef CCISS_DEBUG 3304 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", 3305 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq)); 3306#endif /* CCISS_DEBUG */ 3307 3308 sg_init_table(tmp_sg, MAXSGENTRIES); 3309 seg = blk_rq_map_sg(q, creq, tmp_sg); 3310 3311 /* get the DMA records for the setup */ 3312 if (c->Request.Type.Direction == XFER_READ) 3313 dir = PCI_DMA_FROMDEVICE; 3314 else 3315 dir = PCI_DMA_TODEVICE; 3316 3317 for (i = 0; i < seg; i++) { 3318 c->SG[i].Len = tmp_sg[i].length; 3319 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]), 3320 tmp_sg[i].offset, 3321 tmp_sg[i].length, dir); 3322 c->SG[i].Addr.lower = temp64.val32.lower; 3323 c->SG[i].Addr.upper = temp64.val32.upper; 3324 c->SG[i].Ext = 0; // we are not chaining 3325 } 3326 /* track how many SG entries we are using */ 3327 if (seg > h->maxSG) 3328 h->maxSG = seg; 3329 3330#ifdef CCISS_DEBUG 3331 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n", 3332 blk_rq_sectors(creq), seg); 3333#endif /* CCISS_DEBUG */ 3334 3335 c->Header.SGList = c->Header.SGTotal = seg; 3336 if (likely(blk_fs_request(creq))) { 3337 if(h->cciss_read == CCISS_READ_10) { 3338 c->Request.CDB[1] = 0; 3339 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB 3340 c->Request.CDB[3] = (start_blk >> 16) & 0xff; 3341 c->Request.CDB[4] = (start_blk >> 8) & 0xff; 3342 c->Request.CDB[5] = start_blk & 0xff; 3343 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB 3344 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff; 3345 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff; 3346 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0; 3347 } else { 3348 u32 upper32 = upper_32_bits(start_blk); 3349 3350 c->Request.CDBLen = 16; 3351 c->Request.CDB[1]= 0; 3352 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB 3353 c->Request.CDB[3]= (upper32 >> 16) & 0xff; 3354 c->Request.CDB[4]= (upper32 >> 8) & 0xff; 3355 c->Request.CDB[5]= upper32 & 0xff; 3356 c->Request.CDB[6]= (start_blk >> 24) & 0xff; 3357 c->Request.CDB[7]= (start_blk >> 16) & 0xff; 3358 c->Request.CDB[8]= (start_blk >> 8) & 0xff; 3359 c->Request.CDB[9]= start_blk & 0xff; 3360 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff; 3361 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff; 3362 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff; 3363 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff; 3364 c->Request.CDB[14] = c->Request.CDB[15] = 0; 3365 } 3366 } else if (blk_pc_request(creq)) { 3367 c->Request.CDBLen = creq->cmd_len; 3368 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB); 3369 } else { 3370 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type); 3371 BUG(); 3372 } 3373 3374 spin_lock_irq(q->queue_lock); 3375 3376 addQ(&h->reqQ, c); 3377 h->Qdepth++; 3378 if (h->Qdepth > h->maxQsinceinit) 3379 h->maxQsinceinit = h->Qdepth; 3380 3381 goto queue; 3382full: 3383 blk_stop_queue(q); 3384startio: 3385 /* We will already have the driver lock here so not need 3386 * to lock it. 3387 */ 3388 start_io(h); 3389} 3390 3391static inline unsigned long get_next_completion(ctlr_info_t *h) 3392{ 3393 return h->access.command_completed(h); 3394} 3395 3396static inline int interrupt_pending(ctlr_info_t *h) 3397{ 3398 return h->access.intr_pending(h); 3399} 3400 3401static inline long interrupt_not_for_us(ctlr_info_t *h) 3402{ 3403 return (((h->access.intr_pending(h) == 0) || 3404 (h->interrupts_enabled == 0))); 3405} 3406 3407static irqreturn_t do_cciss_intr(int irq, void *dev_id) 3408{ 3409 ctlr_info_t *h = dev_id; 3410 CommandList_struct *c; 3411 unsigned long flags; 3412 __u32 a, a1, a2; 3413 3414 if (interrupt_not_for_us(h)) 3415 return IRQ_NONE; 3416 /* 3417 * If there are completed commands in the completion queue, 3418 * we had better do something about it. 3419 */ 3420 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 3421 while (interrupt_pending(h)) { 3422 while ((a = get_next_completion(h)) != FIFO_EMPTY) { 3423 a1 = a; 3424 if ((a & 0x04)) { 3425 a2 = (a >> 3); 3426 if (a2 >= h->nr_cmds) { 3427 printk(KERN_WARNING 3428 "cciss: controller cciss%d failed, stopping.\n", 3429 h->ctlr); 3430 fail_all_cmds(h->ctlr); 3431 return IRQ_HANDLED; 3432 } 3433 3434 c = h->cmd_pool + a2; 3435 a = c->busaddr; 3436 3437 } else { 3438 struct hlist_node *tmp; 3439 3440 a &= ~3; 3441 c = NULL; 3442 hlist_for_each_entry(c, tmp, &h->cmpQ, list) { 3443 if (c->busaddr == a) 3444 break; 3445 } 3446 } 3447 /* 3448 * If we've found the command, take it off the 3449 * completion Q and free it 3450 */ 3451 if (c && c->busaddr == a) { 3452 removeQ(c); 3453 if (c->cmd_type == CMD_RWREQ) { 3454 complete_command(h, c, 0); 3455 } else if (c->cmd_type == CMD_IOCTL_PEND) { 3456 complete(c->waiting); 3457 } 3458# ifdef CONFIG_CISS_SCSI_TAPE 3459 else if (c->cmd_type == CMD_SCSI) 3460 complete_scsi_command(c, 0, a1); 3461# endif 3462 continue; 3463 } 3464 } 3465 } 3466 3467 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 3468 return IRQ_HANDLED; 3469} 3470 3471/** 3472 * add_to_scan_list() - add controller to rescan queue 3473 * @h: Pointer to the controller. 3474 * 3475 * Adds the controller to the rescan queue if not already on the queue. 3476 * 3477 * returns 1 if added to the queue, 0 if skipped (could be on the 3478 * queue already, or the controller could be initializing or shutting 3479 * down). 3480 **/ 3481static int add_to_scan_list(struct ctlr_info *h) 3482{ 3483 struct ctlr_info *test_h; 3484 int found = 0; 3485 int ret = 0; 3486 3487 if (h->busy_initializing) 3488 return 0; 3489 3490 if (!mutex_trylock(&h->busy_shutting_down)) 3491 return 0; 3492 3493 mutex_lock(&scan_mutex); 3494 list_for_each_entry(test_h, &scan_q, scan_list) { 3495 if (test_h == h) { 3496 found = 1; 3497 break; 3498 } 3499 } 3500 if (!found && !h->busy_scanning) { 3501 INIT_COMPLETION(h->scan_wait); 3502 list_add_tail(&h->scan_list, &scan_q); 3503 ret = 1; 3504 } 3505 mutex_unlock(&scan_mutex); 3506 mutex_unlock(&h->busy_shutting_down); 3507 3508 return ret; 3509} 3510 3511/** 3512 * remove_from_scan_list() - remove controller from rescan queue 3513 * @h: Pointer to the controller. 3514 * 3515 * Removes the controller from the rescan queue if present. Blocks if 3516 * the controller is currently conducting a rescan. 3517 **/ 3518static void remove_from_scan_list(struct ctlr_info *h) 3519{ 3520 struct ctlr_info *test_h, *tmp_h; 3521 int scanning = 0; 3522 3523 mutex_lock(&scan_mutex); 3524 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) { 3525 if (test_h == h) { 3526 list_del(&h->scan_list); 3527 complete_all(&h->scan_wait); 3528 mutex_unlock(&scan_mutex); 3529 return; 3530 } 3531 } 3532 if (&h->busy_scanning) 3533 scanning = 0; 3534 mutex_unlock(&scan_mutex); 3535 3536 if (scanning) 3537 wait_for_completion(&h->scan_wait); 3538} 3539 3540/** 3541 * scan_thread() - kernel thread used to rescan controllers 3542 * @data: Ignored. 3543 * 3544 * A kernel thread used scan for drive topology changes on 3545 * controllers. The thread processes only one controller at a time 3546 * using a queue. Controllers are added to the queue using 3547 * add_to_scan_list() and removed from the queue either after done 3548 * processing or using remove_from_scan_list(). 3549 * 3550 * returns 0. 3551 **/ 3552static int scan_thread(void *data) 3553{ 3554 struct ctlr_info *h; 3555 3556 while (1) { 3557 set_current_state(TASK_INTERRUPTIBLE); 3558 schedule(); 3559 if (kthread_should_stop()) 3560 break; 3561 3562 while (1) { 3563 mutex_lock(&scan_mutex); 3564 if (list_empty(&scan_q)) { 3565 mutex_unlock(&scan_mutex); 3566 break; 3567 } 3568 3569 h = list_entry(scan_q.next, 3570 struct ctlr_info, 3571 scan_list); 3572 list_del(&h->scan_list); 3573 h->busy_scanning = 1; 3574 mutex_unlock(&scan_mutex); 3575 3576 if (h) { 3577 rebuild_lun_table(h, 0, 0); 3578 complete_all(&h->scan_wait); 3579 mutex_lock(&scan_mutex); 3580 h->busy_scanning = 0; 3581 mutex_unlock(&scan_mutex); 3582 } 3583 } 3584 } 3585 3586 return 0; 3587} 3588 3589static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c) 3590{ 3591 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) 3592 return 0; 3593 3594 switch (c->err_info->SenseInfo[12]) { 3595 case STATE_CHANGED: 3596 printk(KERN_WARNING "cciss%d: a state change " 3597 "detected, command retried\n", h->ctlr); 3598 return 1; 3599 break; 3600 case LUN_FAILED: 3601 printk(KERN_WARNING "cciss%d: LUN failure " 3602 "detected, action required\n", h->ctlr); 3603 return 1; 3604 break; 3605 case REPORT_LUNS_CHANGED: 3606 printk(KERN_WARNING "cciss%d: report LUN data " 3607 "changed\n", h->ctlr); 3608 add_to_scan_list(h); 3609 wake_up_process(cciss_scan_thread); 3610 return 1; 3611 break; 3612 case POWER_OR_RESET: 3613 printk(KERN_WARNING "cciss%d: a power on " 3614 "or device reset detected\n", h->ctlr); 3615 return 1; 3616 break; 3617 case UNIT_ATTENTION_CLEARED: 3618 printk(KERN_WARNING "cciss%d: unit attention " 3619 "cleared by another initiator\n", h->ctlr); 3620 return 1; 3621 break; 3622 default: 3623 printk(KERN_WARNING "cciss%d: unknown " 3624 "unit attention detected\n", h->ctlr); 3625 return 1; 3626 } 3627} 3628 3629/* 3630 * We cannot read the structure directly, for portability we must use 3631 * the io functions. 3632 * This is for debug only. 3633 */ 3634#ifdef CCISS_DEBUG 3635static void print_cfg_table(CfgTable_struct *tb) 3636{ 3637 int i; 3638 char temp_name[17]; 3639 3640 printk("Controller Configuration information\n"); 3641 printk("------------------------------------\n"); 3642 for (i = 0; i < 4; i++) 3643 temp_name[i] = readb(&(tb->Signature[i])); 3644 temp_name[4] = '\0'; 3645 printk(" Signature = %s\n", temp_name); 3646 printk(" Spec Number = %d\n", readl(&(tb->SpecValence))); 3647 printk(" Transport methods supported = 0x%x\n", 3648 readl(&(tb->TransportSupport))); 3649 printk(" Transport methods active = 0x%x\n", 3650 readl(&(tb->TransportActive))); 3651 printk(" Requested transport Method = 0x%x\n", 3652 readl(&(tb->HostWrite.TransportRequest))); 3653 printk(" Coalesce Interrupt Delay = 0x%x\n", 3654 readl(&(tb->HostWrite.CoalIntDelay))); 3655 printk(" Coalesce Interrupt Count = 0x%x\n", 3656 readl(&(tb->HostWrite.CoalIntCount))); 3657 printk(" Max outstanding commands = 0x%d\n", 3658 readl(&(tb->CmdsOutMax))); 3659 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes))); 3660 for (i = 0; i < 16; i++) 3661 temp_name[i] = readb(&(tb->ServerName[i])); 3662 temp_name[16] = '\0'; 3663 printk(" Server Name = %s\n", temp_name); 3664 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat))); 3665} 3666#endif /* CCISS_DEBUG */ 3667 3668static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) 3669{ 3670 int i, offset, mem_type, bar_type; 3671 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ 3672 return 0; 3673 offset = 0; 3674 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3675 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; 3676 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) 3677 offset += 4; 3678 else { 3679 mem_type = pci_resource_flags(pdev, i) & 3680 PCI_BASE_ADDRESS_MEM_TYPE_MASK; 3681 switch (mem_type) { 3682 case PCI_BASE_ADDRESS_MEM_TYPE_32: 3683 case PCI_BASE_ADDRESS_MEM_TYPE_1M: 3684 offset += 4; /* 32 bit */ 3685 break; 3686 case PCI_BASE_ADDRESS_MEM_TYPE_64: 3687 offset += 8; 3688 break; 3689 default: /* reserved in PCI 2.2 */ 3690 printk(KERN_WARNING 3691 "Base address is invalid\n"); 3692 return -1; 3693 break; 3694 } 3695 } 3696 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) 3697 return i + 1; 3698 } 3699 return -1; 3700} 3701 3702/* If MSI/MSI-X is supported by the kernel we will try to enable it on 3703 * controllers that are capable. If not, we use IO-APIC mode. 3704 */ 3705 3706static void __devinit cciss_interrupt_mode(ctlr_info_t *c, 3707 struct pci_dev *pdev, __u32 board_id) 3708{ 3709#ifdef CONFIG_PCI_MSI 3710 int err; 3711 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1}, 3712 {0, 2}, {0, 3} 3713 }; 3714 3715 /* Some boards advertise MSI but don't really support it */ 3716 if ((board_id == 0x40700E11) || 3717 (board_id == 0x40800E11) || 3718 (board_id == 0x40820E11) || (board_id == 0x40830E11)) 3719 goto default_int_mode; 3720 3721 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) { 3722 err = pci_enable_msix(pdev, cciss_msix_entries, 4); 3723 if (!err) { 3724 c->intr[0] = cciss_msix_entries[0].vector; 3725 c->intr[1] = cciss_msix_entries[1].vector; 3726 c->intr[2] = cciss_msix_entries[2].vector; 3727 c->intr[3] = cciss_msix_entries[3].vector; 3728 c->msix_vector = 1; 3729 return; 3730 } 3731 if (err > 0) { 3732 printk(KERN_WARNING "cciss: only %d MSI-X vectors " 3733 "available\n", err); 3734 goto default_int_mode; 3735 } else { 3736 printk(KERN_WARNING "cciss: MSI-X init failed %d\n", 3737 err); 3738 goto default_int_mode; 3739 } 3740 } 3741 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) { 3742 if (!pci_enable_msi(pdev)) { 3743 c->msi_vector = 1; 3744 } else { 3745 printk(KERN_WARNING "cciss: MSI init failed\n"); 3746 } 3747 } 3748default_int_mode: 3749#endif /* CONFIG_PCI_MSI */ 3750 /* if we get here we're going to use the default interrupt mode */ 3751 c->intr[SIMPLE_MODE_INT] = pdev->irq; 3752 return; 3753} 3754 3755static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev) 3756{ 3757 ushort subsystem_vendor_id, subsystem_device_id, command; 3758 __u32 board_id, scratchpad = 0; 3759 __u64 cfg_offset; 3760 __u32 cfg_base_addr; 3761 __u64 cfg_base_addr_index; 3762 int i, prod_index, err; 3763 3764 subsystem_vendor_id = pdev->subsystem_vendor; 3765 subsystem_device_id = pdev->subsystem_device; 3766 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) | 3767 subsystem_vendor_id); 3768 3769 for (i = 0; i < ARRAY_SIZE(products); i++) { 3770 /* Stand aside for hpsa driver on request */ 3771 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY) 3772 return -ENODEV; 3773 if (board_id == products[i].board_id) 3774 break; 3775 } 3776 prod_index = i; 3777 if (prod_index == ARRAY_SIZE(products)) { 3778 dev_warn(&pdev->dev, 3779 "unrecognized board ID: 0x%08lx, ignoring.\n", 3780 (unsigned long) board_id); 3781 return -ENODEV; 3782 } 3783 3784 /* check to see if controller has been disabled */ 3785 /* BEFORE trying to enable it */ 3786 (void)pci_read_config_word(pdev, PCI_COMMAND, &command); 3787 if (!(command & 0x02)) { 3788 printk(KERN_WARNING 3789 "cciss: controller appears to be disabled\n"); 3790 return -ENODEV; 3791 } 3792 3793 err = pci_enable_device(pdev); 3794 if (err) { 3795 printk(KERN_ERR "cciss: Unable to Enable PCI device\n"); 3796 return err; 3797 } 3798 3799 err = pci_request_regions(pdev, "cciss"); 3800 if (err) { 3801 printk(KERN_ERR "cciss: Cannot obtain PCI resources, " 3802 "aborting\n"); 3803 return err; 3804 } 3805 3806#ifdef CCISS_DEBUG 3807 printk("command = %x\n", command); 3808 printk("irq = %x\n", pdev->irq); 3809 printk("board_id = %x\n", board_id); 3810#endif /* CCISS_DEBUG */ 3811 3812/* If the kernel supports MSI/MSI-X we will try to enable that functionality, 3813 * else we use the IO-APIC interrupt assigned to us by system ROM. 3814 */ 3815 cciss_interrupt_mode(c, pdev, board_id); 3816 3817 /* find the memory BAR */ 3818 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3819 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) 3820 break; 3821 } 3822 if (i == DEVICE_COUNT_RESOURCE) { 3823 printk(KERN_WARNING "cciss: No memory BAR found\n"); 3824 err = -ENODEV; 3825 goto err_out_free_res; 3826 } 3827 3828 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits 3829 * already removed 3830 */ 3831 3832#ifdef CCISS_DEBUG 3833 printk("address 0 = %lx\n", c->paddr); 3834#endif /* CCISS_DEBUG */ 3835 c->vaddr = remap_pci_mem(c->paddr, 0x250); 3836 3837 /* Wait for the board to become ready. (PCI hotplug needs this.) 3838 * We poll for up to 120 secs, once per 100ms. */ 3839 for (i = 0; i < 1200; i++) { 3840 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET); 3841 if (scratchpad == CCISS_FIRMWARE_READY) 3842 break; 3843 set_current_state(TASK_INTERRUPTIBLE); 3844 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */ 3845 } 3846 if (scratchpad != CCISS_FIRMWARE_READY) { 3847 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n"); 3848 err = -ENODEV; 3849 goto err_out_free_res; 3850 } 3851 3852 /* get the address index number */ 3853 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET); 3854 cfg_base_addr &= (__u32) 0x0000ffff; 3855#ifdef CCISS_DEBUG 3856 printk("cfg base address = %x\n", cfg_base_addr); 3857#endif /* CCISS_DEBUG */ 3858 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr); 3859#ifdef CCISS_DEBUG 3860 printk("cfg base address index = %llx\n", 3861 (unsigned long long)cfg_base_addr_index); 3862#endif /* CCISS_DEBUG */ 3863 if (cfg_base_addr_index == -1) { 3864 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n"); 3865 err = -ENODEV; 3866 goto err_out_free_res; 3867 } 3868 3869 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET); 3870#ifdef CCISS_DEBUG 3871 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset); 3872#endif /* CCISS_DEBUG */ 3873 c->cfgtable = remap_pci_mem(pci_resource_start(pdev, 3874 cfg_base_addr_index) + 3875 cfg_offset, sizeof(CfgTable_struct)); 3876 c->board_id = board_id; 3877 3878#ifdef CCISS_DEBUG 3879 print_cfg_table(c->cfgtable); 3880#endif /* CCISS_DEBUG */ 3881 3882 /* Some controllers support Zero Memory Raid (ZMR). 3883 * When configured in ZMR mode the number of supported 3884 * commands drops to 64. So instead of just setting an 3885 * arbitrary value we make the driver a little smarter. 3886 * We read the config table to tell us how many commands 3887 * are supported on the controller then subtract 4 to 3888 * leave a little room for ioctl calls. 3889 */ 3890 c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); 3891 c->product_name = products[prod_index].product_name; 3892 c->access = *(products[prod_index].access); 3893 c->nr_cmds = c->max_commands - 4; 3894 if ((readb(&c->cfgtable->Signature[0]) != 'C') || 3895 (readb(&c->cfgtable->Signature[1]) != 'I') || 3896 (readb(&c->cfgtable->Signature[2]) != 'S') || 3897 (readb(&c->cfgtable->Signature[3]) != 'S')) { 3898 printk("Does not appear to be a valid CISS config table\n"); 3899 err = -ENODEV; 3900 goto err_out_free_res; 3901 } 3902#ifdef CONFIG_X86 3903 { 3904 /* Need to enable prefetch in the SCSI core for 6400 in x86 */ 3905 __u32 prefetch; 3906 prefetch = readl(&(c->cfgtable->SCSI_Prefetch)); 3907 prefetch |= 0x100; 3908 writel(prefetch, &(c->cfgtable->SCSI_Prefetch)); 3909 } 3910#endif 3911 3912 /* Disabling DMA prefetch and refetch for the P600. 3913 * An ASIC bug may result in accesses to invalid memory addresses. 3914 * We've disabled prefetch for some time now. Testing with XEN 3915 * kernels revealed a bug in the refetch if dom0 resides on a P600. 3916 */ 3917 if(board_id == 0x3225103C) { 3918 __u32 dma_prefetch; 3919 __u32 dma_refetch; 3920 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG); 3921 dma_prefetch |= 0x8000; 3922 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG); 3923 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch); 3924 dma_refetch |= 0x1; 3925 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch); 3926 } 3927 3928#ifdef CCISS_DEBUG 3929 printk("Trying to put board into Simple mode\n"); 3930#endif /* CCISS_DEBUG */ 3931 c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); 3932 /* Update the field, and then ring the doorbell */ 3933 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest)); 3934 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL); 3935 3936 /* under certain very rare conditions, this can take awhile. 3937 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right 3938 * as we enter this code.) */ 3939 for (i = 0; i < MAX_CONFIG_WAIT; i++) { 3940 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) 3941 break; 3942 /* delay and try again */ 3943 set_current_state(TASK_INTERRUPTIBLE); 3944 schedule_timeout(msecs_to_jiffies(1)); 3945 } 3946 3947#ifdef CCISS_DEBUG 3948 printk(KERN_DEBUG "I counter got to %d %x\n", i, 3949 readl(c->vaddr + SA5_DOORBELL)); 3950#endif /* CCISS_DEBUG */ 3951#ifdef CCISS_DEBUG 3952 print_cfg_table(c->cfgtable); 3953#endif /* CCISS_DEBUG */ 3954 3955 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) { 3956 printk(KERN_WARNING "cciss: unable to get board into" 3957 " simple mode\n"); 3958 err = -ENODEV; 3959 goto err_out_free_res; 3960 } 3961 return 0; 3962 3963err_out_free_res: 3964 /* 3965 * Deliberately omit pci_disable_device(): it does something nasty to 3966 * Smart Array controllers that pci_enable_device does not undo 3967 */ 3968 pci_release_regions(pdev); 3969 return err; 3970} 3971 3972/* Function to find the first free pointer into our hba[] array 3973 * Returns -1 if no free entries are left. 3974 */ 3975static int alloc_cciss_hba(void) 3976{ 3977 int i; 3978 3979 for (i = 0; i < MAX_CTLR; i++) { 3980 if (!hba[i]) { 3981 ctlr_info_t *p; 3982 3983 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); 3984 if (!p) 3985 goto Enomem; 3986 hba[i] = p; 3987 return i; 3988 } 3989 } 3990 printk(KERN_WARNING "cciss: This driver supports a maximum" 3991 " of %d controllers.\n", MAX_CTLR); 3992 return -1; 3993Enomem: 3994 printk(KERN_ERR "cciss: out of memory.\n"); 3995 return -1; 3996} 3997 3998static void free_hba(int n) 3999{ 4000 ctlr_info_t *h = hba[n]; 4001 int i; 4002 4003 hba[n] = NULL; 4004 for (i = 0; i < h->highest_lun + 1; i++) 4005 if (h->gendisk[i] != NULL) 4006 put_disk(h->gendisk[i]); 4007 kfree(h); 4008} 4009 4010/* Send a message CDB to the firmware. */ 4011static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) 4012{ 4013 typedef struct { 4014 CommandListHeader_struct CommandHeader; 4015 RequestBlock_struct Request; 4016 ErrDescriptor_struct ErrorDescriptor; 4017 } Command; 4018 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); 4019 Command *cmd; 4020 dma_addr_t paddr64; 4021 uint32_t paddr32, tag; 4022 void __iomem *vaddr; 4023 int i, err; 4024 4025 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 4026 if (vaddr == NULL) 4027 return -ENOMEM; 4028 4029 /* The Inbound Post Queue only accepts 32-bit physical addresses for the 4030 CCISS commands, so they must be allocated from the lower 4GiB of 4031 memory. */ 4032 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 4033 if (err) { 4034 iounmap(vaddr); 4035 return -ENOMEM; 4036 } 4037 4038 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); 4039 if (cmd == NULL) { 4040 iounmap(vaddr); 4041 return -ENOMEM; 4042 } 4043 4044 /* This must fit, because of the 32-bit consistent DMA mask. Also, 4045 although there's no guarantee, we assume that the address is at 4046 least 4-byte aligned (most likely, it's page-aligned). */ 4047 paddr32 = paddr64; 4048 4049 cmd->CommandHeader.ReplyQueue = 0; 4050 cmd->CommandHeader.SGList = 0; 4051 cmd->CommandHeader.SGTotal = 0; 4052 cmd->CommandHeader.Tag.lower = paddr32; 4053 cmd->CommandHeader.Tag.upper = 0; 4054 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); 4055 4056 cmd->Request.CDBLen = 16; 4057 cmd->Request.Type.Type = TYPE_MSG; 4058 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; 4059 cmd->Request.Type.Direction = XFER_NONE; 4060 cmd->Request.Timeout = 0; /* Don't time out */ 4061 cmd->Request.CDB[0] = opcode; 4062 cmd->Request.CDB[1] = type; 4063 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ 4064 4065 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); 4066 cmd->ErrorDescriptor.Addr.upper = 0; 4067 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); 4068 4069 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); 4070 4071 for (i = 0; i < 10; i++) { 4072 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); 4073 if ((tag & ~3) == paddr32) 4074 break; 4075 schedule_timeout_uninterruptible(HZ); 4076 } 4077 4078 iounmap(vaddr); 4079 4080 /* we leak the DMA buffer here ... no choice since the controller could 4081 still complete the command. */ 4082 if (i == 10) { 4083 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n", 4084 opcode, type); 4085 return -ETIMEDOUT; 4086 } 4087 4088 pci_free_consistent(pdev, cmd_sz, cmd, paddr64); 4089 4090 if (tag & 2) { 4091 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n", 4092 opcode, type); 4093 return -EIO; 4094 } 4095 4096 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n", 4097 opcode, type); 4098 return 0; 4099} 4100 4101#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0) 4102#define cciss_noop(p) cciss_message(p, 3, 0) 4103 4104static __devinit int cciss_reset_msi(struct pci_dev *pdev) 4105{ 4106/* the #defines are stolen from drivers/pci/msi.h. */ 4107#define msi_control_reg(base) (base + PCI_MSI_FLAGS) 4108#define PCI_MSIX_FLAGS_ENABLE (1 << 15) 4109 4110 int pos; 4111 u16 control = 0; 4112 4113 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); 4114 if (pos) { 4115 pci_read_config_word(pdev, msi_control_reg(pos), &control); 4116 if (control & PCI_MSI_FLAGS_ENABLE) { 4117 printk(KERN_INFO "cciss: resetting MSI\n"); 4118 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE); 4119 } 4120 } 4121 4122 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); 4123 if (pos) { 4124 pci_read_config_word(pdev, msi_control_reg(pos), &control); 4125 if (control & PCI_MSIX_FLAGS_ENABLE) { 4126 printk(KERN_INFO "cciss: resetting MSI-X\n"); 4127 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE); 4128 } 4129 } 4130 4131 return 0; 4132} 4133 4134/* This does a hard reset of the controller using PCI power management 4135 * states. */ 4136static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev) 4137{ 4138 u16 pmcsr, saved_config_space[32]; 4139 int i, pos; 4140 4141 printk(KERN_INFO "cciss: using PCI PM to reset controller\n"); 4142 4143 /* This is very nearly the same thing as 4144 4145 pci_save_state(pci_dev); 4146 pci_set_power_state(pci_dev, PCI_D3hot); 4147 pci_set_power_state(pci_dev, PCI_D0); 4148 pci_restore_state(pci_dev); 4149 4150 but we can't use these nice canned kernel routines on 4151 kexec, because they also check the MSI/MSI-X state in PCI 4152 configuration space and do the wrong thing when it is 4153 set/cleared. Also, the pci_save/restore_state functions 4154 violate the ordering requirements for restoring the 4155 configuration space from the CCISS document (see the 4156 comment below). So we roll our own .... */ 4157 4158 for (i = 0; i < 32; i++) 4159 pci_read_config_word(pdev, 2*i, &saved_config_space[i]); 4160 4161 pos = pci_find_capability(pdev, PCI_CAP_ID_PM); 4162 if (pos == 0) { 4163 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n"); 4164 return -ENODEV; 4165 } 4166 4167 /* Quoting from the Open CISS Specification: "The Power 4168 * Management Control/Status Register (CSR) controls the power 4169 * state of the device. The normal operating state is D0, 4170 * CSR=00h. The software off state is D3, CSR=03h. To reset 4171 * the controller, place the interface device in D3 then to 4172 * D0, this causes a secondary PCI reset which will reset the 4173 * controller." */ 4174 4175 /* enter the D3hot power management state */ 4176 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); 4177 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4178 pmcsr |= PCI_D3hot; 4179 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4180 4181 schedule_timeout_uninterruptible(HZ >> 1); 4182 4183 /* enter the D0 power management state */ 4184 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4185 pmcsr |= PCI_D0; 4186 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4187 4188 schedule_timeout_uninterruptible(HZ >> 1); 4189 4190 /* Restore the PCI configuration space. The Open CISS 4191 * Specification says, "Restore the PCI Configuration 4192 * Registers, offsets 00h through 60h. It is important to 4193 * restore the command register, 16-bits at offset 04h, 4194 * last. Do not restore the configuration status register, 4195 * 16-bits at offset 06h." Note that the offset is 2*i. */ 4196 for (i = 0; i < 32; i++) { 4197 if (i == 2 || i == 3) 4198 continue; 4199 pci_write_config_word(pdev, 2*i, saved_config_space[i]); 4200 } 4201 wmb(); 4202 pci_write_config_word(pdev, 4, saved_config_space[2]); 4203 4204 return 0; 4205} 4206 4207/* 4208 * This is it. Find all the controllers and register them. I really hate 4209 * stealing all these major device numbers. 4210 * returns the number of block devices registered. 4211 */ 4212static int __devinit cciss_init_one(struct pci_dev *pdev, 4213 const struct pci_device_id *ent) 4214{ 4215 int i; 4216 int j = 0; 4217 int rc; 4218 int dac, return_code; 4219 InquiryData_struct *inq_buff; 4220 4221 if (reset_devices) { 4222 /* Reset the controller with a PCI power-cycle */ 4223 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev)) 4224 return -ENODEV; 4225 4226 /* Now try to get the controller to respond to a no-op. Some 4227 devices (notably the HP Smart Array 5i Controller) need 4228 up to 30 seconds to respond. */ 4229 for (i=0; i<30; i++) { 4230 if (cciss_noop(pdev) == 0) 4231 break; 4232 4233 schedule_timeout_uninterruptible(HZ); 4234 } 4235 if (i == 30) { 4236 printk(KERN_ERR "cciss: controller seems dead\n"); 4237 return -EBUSY; 4238 } 4239 } 4240 4241 i = alloc_cciss_hba(); 4242 if (i < 0) 4243 return -1; 4244 4245 hba[i]->busy_initializing = 1; 4246 INIT_HLIST_HEAD(&hba[i]->cmpQ); 4247 INIT_HLIST_HEAD(&hba[i]->reqQ); 4248 mutex_init(&hba[i]->busy_shutting_down); 4249 4250 if (cciss_pci_init(hba[i], pdev) != 0) 4251 goto clean_no_release_regions; 4252 4253 sprintf(hba[i]->devname, "cciss%d", i); 4254 hba[i]->ctlr = i; 4255 hba[i]->pdev = pdev; 4256 4257 init_completion(&hba[i]->scan_wait); 4258 4259 if (cciss_create_hba_sysfs_entry(hba[i])) 4260 goto clean0; 4261 4262 /* configure PCI DMA stuff */ 4263 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) 4264 dac = 1; 4265 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) 4266 dac = 0; 4267 else { 4268 printk(KERN_ERR "cciss: no suitable DMA available\n"); 4269 goto clean1; 4270 } 4271 4272 /* 4273 * register with the major number, or get a dynamic major number 4274 * by passing 0 as argument. This is done for greater than 4275 * 8 controller support. 4276 */ 4277 if (i < MAX_CTLR_ORIG) 4278 hba[i]->major = COMPAQ_CISS_MAJOR + i; 4279 rc = register_blkdev(hba[i]->major, hba[i]->devname); 4280 if (rc == -EBUSY || rc == -EINVAL) { 4281 printk(KERN_ERR 4282 "cciss: Unable to get major number %d for %s " 4283 "on hba %d\n", hba[i]->major, hba[i]->devname, i); 4284 goto clean1; 4285 } else { 4286 if (i >= MAX_CTLR_ORIG) 4287 hba[i]->major = rc; 4288 } 4289 4290 /* make sure the board interrupts are off */ 4291 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF); 4292 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr, 4293 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) { 4294 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n", 4295 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname); 4296 goto clean2; 4297 } 4298 4299 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n", 4300 hba[i]->devname, pdev->device, pci_name(pdev), 4301 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not"); 4302 4303 hba[i]->cmd_pool_bits = 4304 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4305 * sizeof(unsigned long), GFP_KERNEL); 4306 hba[i]->cmd_pool = (CommandList_struct *) 4307 pci_alloc_consistent(hba[i]->pdev, 4308 hba[i]->nr_cmds * sizeof(CommandList_struct), 4309 &(hba[i]->cmd_pool_dhandle)); 4310 hba[i]->errinfo_pool = (ErrorInfo_struct *) 4311 pci_alloc_consistent(hba[i]->pdev, 4312 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4313 &(hba[i]->errinfo_pool_dhandle)); 4314 if ((hba[i]->cmd_pool_bits == NULL) 4315 || (hba[i]->cmd_pool == NULL) 4316 || (hba[i]->errinfo_pool == NULL)) { 4317 printk(KERN_ERR "cciss: out of memory"); 4318 goto clean4; 4319 } 4320 spin_lock_init(&hba[i]->lock); 4321 4322 /* Initialize the pdev driver private data. 4323 have it point to hba[i]. */ 4324 pci_set_drvdata(pdev, hba[i]); 4325 /* command and error info recs zeroed out before 4326 they are used */ 4327 memset(hba[i]->cmd_pool_bits, 0, 4328 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4329 * sizeof(unsigned long)); 4330 4331 hba[i]->num_luns = 0; 4332 hba[i]->highest_lun = -1; 4333 for (j = 0; j < CISS_MAX_LUN; j++) { 4334 hba[i]->drv[j] = NULL; 4335 hba[i]->gendisk[j] = NULL; 4336 } 4337 4338 cciss_scsi_setup(i); 4339 4340 /* Turn the interrupts on so we can service requests */ 4341 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON); 4342 4343 /* Get the firmware version */ 4344 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 4345 if (inq_buff == NULL) { 4346 printk(KERN_ERR "cciss: out of memory\n"); 4347 goto clean4; 4348 } 4349 4350 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff, 4351 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD); 4352 if (return_code == IO_OK) { 4353 hba[i]->firm_ver[0] = inq_buff->data_byte[32]; 4354 hba[i]->firm_ver[1] = inq_buff->data_byte[33]; 4355 hba[i]->firm_ver[2] = inq_buff->data_byte[34]; 4356 hba[i]->firm_ver[3] = inq_buff->data_byte[35]; 4357 } else { /* send command failed */ 4358 printk(KERN_WARNING "cciss: unable to determine firmware" 4359 " version of controller\n"); 4360 } 4361 kfree(inq_buff); 4362 4363 cciss_procinit(i); 4364 4365 hba[i]->cciss_max_sectors = 2048; 4366 4367 rebuild_lun_table(hba[i], 1, 0); 4368 hba[i]->busy_initializing = 0; 4369 return 1; 4370 4371clean4: 4372 kfree(hba[i]->cmd_pool_bits); 4373 if (hba[i]->cmd_pool) 4374 pci_free_consistent(hba[i]->pdev, 4375 hba[i]->nr_cmds * sizeof(CommandList_struct), 4376 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4377 if (hba[i]->errinfo_pool) 4378 pci_free_consistent(hba[i]->pdev, 4379 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4380 hba[i]->errinfo_pool, 4381 hba[i]->errinfo_pool_dhandle); 4382 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]); 4383clean2: 4384 unregister_blkdev(hba[i]->major, hba[i]->devname); 4385clean1: 4386 cciss_destroy_hba_sysfs_entry(hba[i]); 4387clean0: 4388 pci_release_regions(pdev); 4389clean_no_release_regions: 4390 hba[i]->busy_initializing = 0; 4391 4392 /* 4393 * Deliberately omit pci_disable_device(): it does something nasty to 4394 * Smart Array controllers that pci_enable_device does not undo 4395 */ 4396 pci_set_drvdata(pdev, NULL); 4397 free_hba(i); 4398 return -1; 4399} 4400 4401static void cciss_shutdown(struct pci_dev *pdev) 4402{ 4403 ctlr_info_t *tmp_ptr; 4404 int i; 4405 char flush_buf[4]; 4406 int return_code; 4407 4408 tmp_ptr = pci_get_drvdata(pdev); 4409 if (tmp_ptr == NULL) 4410 return; 4411 i = tmp_ptr->ctlr; 4412 if (hba[i] == NULL) 4413 return; 4414 4415 /* Turn board interrupts off and send the flush cache command */ 4416 /* sendcmd will turn off interrupt, and send the flush... 4417 * To write all data in the battery backed cache to disks */ 4418 memset(flush_buf, 0, 4); 4419 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 4420 CTLR_LUNID, TYPE_CMD); 4421 if (return_code == IO_OK) { 4422 printk(KERN_INFO "Completed flushing cache on controller %d\n", i); 4423 } else { 4424 printk(KERN_WARNING "Error flushing cache on controller %d\n", i); 4425 } 4426 free_irq(hba[i]->intr[2], hba[i]); 4427} 4428 4429static void __devexit cciss_remove_one(struct pci_dev *pdev) 4430{ 4431 ctlr_info_t *tmp_ptr; 4432 int i, j; 4433 4434 if (pci_get_drvdata(pdev) == NULL) { 4435 printk(KERN_ERR "cciss: Unable to remove device \n"); 4436 return; 4437 } 4438 4439 tmp_ptr = pci_get_drvdata(pdev); 4440 i = tmp_ptr->ctlr; 4441 if (hba[i] == NULL) { 4442 printk(KERN_ERR "cciss: device appears to " 4443 "already be removed \n"); 4444 return; 4445 } 4446 4447 mutex_lock(&hba[i]->busy_shutting_down); 4448 4449 remove_from_scan_list(hba[i]); 4450 remove_proc_entry(hba[i]->devname, proc_cciss); 4451 unregister_blkdev(hba[i]->major, hba[i]->devname); 4452 4453 /* remove it from the disk list */ 4454 for (j = 0; j < CISS_MAX_LUN; j++) { 4455 struct gendisk *disk = hba[i]->gendisk[j]; 4456 if (disk) { 4457 struct request_queue *q = disk->queue; 4458 4459 if (disk->flags & GENHD_FL_UP) { 4460 cciss_destroy_ld_sysfs_entry(hba[i], j, 1); 4461 del_gendisk(disk); 4462 } 4463 if (q) 4464 blk_cleanup_queue(q); 4465 } 4466 } 4467 4468#ifdef CONFIG_CISS_SCSI_TAPE 4469 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */ 4470#endif 4471 4472 cciss_shutdown(pdev); 4473 4474#ifdef CONFIG_PCI_MSI 4475 if (hba[i]->msix_vector) 4476 pci_disable_msix(hba[i]->pdev); 4477 else if (hba[i]->msi_vector) 4478 pci_disable_msi(hba[i]->pdev); 4479#endif /* CONFIG_PCI_MSI */ 4480 4481 iounmap(hba[i]->vaddr); 4482 4483 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct), 4484 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4485 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4486 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle); 4487 kfree(hba[i]->cmd_pool_bits); 4488 /* 4489 * Deliberately omit pci_disable_device(): it does something nasty to 4490 * Smart Array controllers that pci_enable_device does not undo 4491 */ 4492 pci_release_regions(pdev); 4493 pci_set_drvdata(pdev, NULL); 4494 cciss_destroy_hba_sysfs_entry(hba[i]); 4495 mutex_unlock(&hba[i]->busy_shutting_down); 4496 free_hba(i); 4497} 4498 4499static struct pci_driver cciss_pci_driver = { 4500 .name = "cciss", 4501 .probe = cciss_init_one, 4502 .remove = __devexit_p(cciss_remove_one), 4503 .id_table = cciss_pci_device_id, /* id_table */ 4504 .shutdown = cciss_shutdown, 4505}; 4506 4507/* 4508 * This is it. Register the PCI driver information for the cards we control 4509 * the OS will call our registered routines when it finds one of our cards. 4510 */ 4511static int __init cciss_init(void) 4512{ 4513 int err; 4514 4515 /* 4516 * The hardware requires that commands are aligned on a 64-bit 4517 * boundary. Given that we use pci_alloc_consistent() to allocate an 4518 * array of them, the size must be a multiple of 8 bytes. 4519 */ 4520 BUILD_BUG_ON(sizeof(CommandList_struct) % 8); 4521 4522 printk(KERN_INFO DRIVER_NAME "\n"); 4523 4524 err = bus_register(&cciss_bus_type); 4525 if (err) 4526 return err; 4527 4528 /* Start the scan thread */ 4529 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan"); 4530 if (IS_ERR(cciss_scan_thread)) { 4531 err = PTR_ERR(cciss_scan_thread); 4532 goto err_bus_unregister; 4533 } 4534 4535 /* Register for our PCI devices */ 4536 err = pci_register_driver(&cciss_pci_driver); 4537 if (err) 4538 goto err_thread_stop; 4539 4540 return err; 4541 4542err_thread_stop: 4543 kthread_stop(cciss_scan_thread); 4544err_bus_unregister: 4545 bus_unregister(&cciss_bus_type); 4546 4547 return err; 4548} 4549 4550static void __exit cciss_cleanup(void) 4551{ 4552 int i; 4553 4554 pci_unregister_driver(&cciss_pci_driver); 4555 /* double check that all controller entrys have been removed */ 4556 for (i = 0; i < MAX_CTLR; i++) { 4557 if (hba[i] != NULL) { 4558 printk(KERN_WARNING "cciss: had to remove" 4559 " controller %d\n", i); 4560 cciss_remove_one(hba[i]->pdev); 4561 } 4562 } 4563 kthread_stop(cciss_scan_thread); 4564 remove_proc_entry("driver/cciss", NULL); 4565 bus_unregister(&cciss_bus_type); 4566} 4567 4568static void fail_all_cmds(unsigned long ctlr) 4569{ 4570 /* If we get here, the board is apparently dead. */ 4571 ctlr_info_t *h = hba[ctlr]; 4572 CommandList_struct *c; 4573 unsigned long flags; 4574 4575 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr); 4576 h->alive = 0; /* the controller apparently died... */ 4577 4578 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 4579 4580 pci_disable_device(h->pdev); /* Make sure it is really dead. */ 4581 4582 /* move everything off the request queue onto the completed queue */ 4583 while (!hlist_empty(&h->reqQ)) { 4584 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 4585 removeQ(c); 4586 h->Qdepth--; 4587 addQ(&h->cmpQ, c); 4588 } 4589 4590 /* Now, fail everything on the completed queue with a HW error */ 4591 while (!hlist_empty(&h->cmpQ)) { 4592 c = hlist_entry(h->cmpQ.first, CommandList_struct, list); 4593 removeQ(c); 4594 if (c->cmd_type != CMD_MSG_STALE) 4595 c->err_info->CommandStatus = CMD_HARDWARE_ERR; 4596 if (c->cmd_type == CMD_RWREQ) { 4597 complete_command(h, c, 0); 4598 } else if (c->cmd_type == CMD_IOCTL_PEND) 4599 complete(c->waiting); 4600#ifdef CONFIG_CISS_SCSI_TAPE 4601 else if (c->cmd_type == CMD_SCSI) 4602 complete_scsi_command(c, 0, 0); 4603#endif 4604 } 4605 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 4606 return; 4607} 4608 4609module_init(cciss_init); 4610module_exit(cciss_cleanup); 4611