cciss.c revision 2cfa948c9ea8681e831743a3bb61157f590fa8d8
1/* 2 * Disk Array driver for HP Smart Array controllers. 3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 * 02111-1307, USA. 18 * 19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com 20 * 21 */ 22 23#include <linux/module.h> 24#include <linux/interrupt.h> 25#include <linux/types.h> 26#include <linux/pci.h> 27#include <linux/kernel.h> 28#include <linux/slab.h> 29#include <linux/smp_lock.h> 30#include <linux/delay.h> 31#include <linux/major.h> 32#include <linux/fs.h> 33#include <linux/bio.h> 34#include <linux/blkpg.h> 35#include <linux/timer.h> 36#include <linux/proc_fs.h> 37#include <linux/seq_file.h> 38#include <linux/init.h> 39#include <linux/jiffies.h> 40#include <linux/hdreg.h> 41#include <linux/spinlock.h> 42#include <linux/compat.h> 43#include <linux/mutex.h> 44#include <asm/uaccess.h> 45#include <asm/io.h> 46 47#include <linux/dma-mapping.h> 48#include <linux/blkdev.h> 49#include <linux/genhd.h> 50#include <linux/completion.h> 51#include <scsi/scsi.h> 52#include <scsi/sg.h> 53#include <scsi/scsi_ioctl.h> 54#include <linux/cdrom.h> 55#include <linux/scatterlist.h> 56#include <linux/kthread.h> 57 58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin)) 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)" 60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20) 61 62/* Embedded module documentation macros - see modules.h */ 63MODULE_AUTHOR("Hewlett-Packard Company"); 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers"); 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400" 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m" 67 " Smart Array G2 Series SAS/SATA Controllers"); 68MODULE_VERSION("3.6.20"); 69MODULE_LICENSE("GPL"); 70 71#include "cciss_cmd.h" 72#include "cciss.h" 73#include <linux/cciss_ioctl.h> 74 75/* define the PCI info for the cards we can control */ 76static const struct pci_device_id cciss_pci_device_id[] = { 77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070}, 78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080}, 79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082}, 80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083}, 81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091}, 82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A}, 83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B}, 84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C}, 85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D}, 86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225}, 87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223}, 88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234}, 89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235}, 90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211}, 91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212}, 92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213}, 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214}, 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215}, 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237}, 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D}, 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241}, 98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243}, 99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245}, 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247}, 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249}, 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A}, 103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B}, 104 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 105 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0}, 106 {0,} 107}; 108 109MODULE_DEVICE_TABLE(pci, cciss_pci_device_id); 110 111/* board_id = Subsystem Device ID & Vendor ID 112 * product = Marketing Name for the board 113 * access = Address of the struct of function pointers 114 */ 115static struct board_type products[] = { 116 {0x40700E11, "Smart Array 5300", &SA5_access}, 117 {0x40800E11, "Smart Array 5i", &SA5B_access}, 118 {0x40820E11, "Smart Array 532", &SA5B_access}, 119 {0x40830E11, "Smart Array 5312", &SA5B_access}, 120 {0x409A0E11, "Smart Array 641", &SA5_access}, 121 {0x409B0E11, "Smart Array 642", &SA5_access}, 122 {0x409C0E11, "Smart Array 6400", &SA5_access}, 123 {0x409D0E11, "Smart Array 6400 EM", &SA5_access}, 124 {0x40910E11, "Smart Array 6i", &SA5_access}, 125 {0x3225103C, "Smart Array P600", &SA5_access}, 126 {0x3223103C, "Smart Array P800", &SA5_access}, 127 {0x3234103C, "Smart Array P400", &SA5_access}, 128 {0x3235103C, "Smart Array P400i", &SA5_access}, 129 {0x3211103C, "Smart Array E200i", &SA5_access}, 130 {0x3212103C, "Smart Array E200", &SA5_access}, 131 {0x3213103C, "Smart Array E200i", &SA5_access}, 132 {0x3214103C, "Smart Array E200i", &SA5_access}, 133 {0x3215103C, "Smart Array E200i", &SA5_access}, 134 {0x3237103C, "Smart Array E500", &SA5_access}, 135 {0x323D103C, "Smart Array P700m", &SA5_access}, 136 {0x3241103C, "Smart Array P212", &SA5_access}, 137 {0x3243103C, "Smart Array P410", &SA5_access}, 138 {0x3245103C, "Smart Array P410i", &SA5_access}, 139 {0x3247103C, "Smart Array P411", &SA5_access}, 140 {0x3249103C, "Smart Array P812", &SA5_access}, 141 {0x324A103C, "Smart Array P712m", &SA5_access}, 142 {0x324B103C, "Smart Array P711m", &SA5_access}, 143 {0xFFFF103C, "Unknown Smart Array", &SA5_access}, 144}; 145 146/* How long to wait (in milliseconds) for board to go into simple mode */ 147#define MAX_CONFIG_WAIT 30000 148#define MAX_IOCTL_CONFIG_WAIT 1000 149 150/*define how many times we will try a command because of bus resets */ 151#define MAX_CMD_RETRIES 3 152 153#define MAX_CTLR 32 154 155/* Originally cciss driver only supports 8 major numbers */ 156#define MAX_CTLR_ORIG 8 157 158static ctlr_info_t *hba[MAX_CTLR]; 159 160static struct task_struct *cciss_scan_thread; 161static DEFINE_MUTEX(scan_mutex); 162static LIST_HEAD(scan_q); 163 164static void do_cciss_request(struct request_queue *q); 165static irqreturn_t do_cciss_intr(int irq, void *dev_id); 166static int cciss_open(struct block_device *bdev, fmode_t mode); 167static int cciss_release(struct gendisk *disk, fmode_t mode); 168static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 169 unsigned int cmd, unsigned long arg); 170static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); 171 172static int cciss_revalidate(struct gendisk *disk); 173static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl); 174static int deregister_disk(ctlr_info_t *h, int drv_index, 175 int clear_all, int via_ioctl); 176 177static void cciss_read_capacity(int ctlr, int logvol, int withirq, 178 sector_t *total_size, unsigned int *block_size); 179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq, 180 sector_t *total_size, unsigned int *block_size); 181static void cciss_geometry_inquiry(int ctlr, int logvol, 182 int withirq, sector_t total_size, 183 unsigned int block_size, InquiryData_struct *inq_buff, 184 drive_info_struct *drv); 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *, 186 __u32); 187static void start_io(ctlr_info_t *h); 188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type); 190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 191 __u8 page_code, unsigned char scsi3addr[], 192 int cmd_type); 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 194 int attempt_retry); 195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c); 196 197static void fail_all_cmds(unsigned long ctlr); 198static int add_to_scan_list(struct ctlr_info *h); 199static int scan_thread(void *data); 200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c); 201static void cciss_hba_release(struct device *dev); 202static void cciss_device_release(struct device *dev); 203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index); 204static void cciss_free_drive_info(ctlr_info_t *h, int drv_index); 205 206#ifdef CONFIG_PROC_FS 207static void cciss_procinit(int i); 208#else 209static void cciss_procinit(int i) 210{ 211} 212#endif /* CONFIG_PROC_FS */ 213 214#ifdef CONFIG_COMPAT 215static int cciss_compat_ioctl(struct block_device *, fmode_t, 216 unsigned, unsigned long); 217#endif 218 219static const struct block_device_operations cciss_fops = { 220 .owner = THIS_MODULE, 221 .open = cciss_open, 222 .release = cciss_release, 223 .locked_ioctl = cciss_ioctl, 224 .getgeo = cciss_getgeo, 225#ifdef CONFIG_COMPAT 226 .compat_ioctl = cciss_compat_ioctl, 227#endif 228 .revalidate_disk = cciss_revalidate, 229}; 230 231/* 232 * Enqueuing and dequeuing functions for cmdlists. 233 */ 234static inline void addQ(struct hlist_head *list, CommandList_struct *c) 235{ 236 hlist_add_head(&c->list, list); 237} 238 239static inline void removeQ(CommandList_struct *c) 240{ 241 /* 242 * After kexec/dump some commands might still 243 * be in flight, which the firmware will try 244 * to complete. Resetting the firmware doesn't work 245 * with old fw revisions, so we have to mark 246 * them off as 'stale' to prevent the driver from 247 * falling over. 248 */ 249 if (WARN_ON(hlist_unhashed(&c->list))) { 250 c->cmd_type = CMD_MSG_STALE; 251 return; 252 } 253 254 hlist_del_init(&c->list); 255} 256 257#include "cciss_scsi.c" /* For SCSI tape support */ 258 259static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", 260 "UNKNOWN" 261}; 262#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1) 263 264#ifdef CONFIG_PROC_FS 265 266/* 267 * Report information about this controller. 268 */ 269#define ENG_GIG 1000000000 270#define ENG_GIG_FACTOR (ENG_GIG/512) 271#define ENGAGE_SCSI "engage scsi" 272 273static struct proc_dir_entry *proc_cciss; 274 275static void cciss_seq_show_header(struct seq_file *seq) 276{ 277 ctlr_info_t *h = seq->private; 278 279 seq_printf(seq, "%s: HP %s Controller\n" 280 "Board ID: 0x%08lx\n" 281 "Firmware Version: %c%c%c%c\n" 282 "IRQ: %d\n" 283 "Logical drives: %d\n" 284 "Current Q depth: %d\n" 285 "Current # commands on controller: %d\n" 286 "Max Q depth since init: %d\n" 287 "Max # commands on controller since init: %d\n" 288 "Max SG entries since init: %d\n", 289 h->devname, 290 h->product_name, 291 (unsigned long)h->board_id, 292 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], 293 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT], 294 h->num_luns, 295 h->Qdepth, h->commands_outstanding, 296 h->maxQsinceinit, h->max_outstanding, h->maxSG); 297 298#ifdef CONFIG_CISS_SCSI_TAPE 299 cciss_seq_tape_report(seq, h->ctlr); 300#endif /* CONFIG_CISS_SCSI_TAPE */ 301} 302 303static void *cciss_seq_start(struct seq_file *seq, loff_t *pos) 304{ 305 ctlr_info_t *h = seq->private; 306 unsigned ctlr = h->ctlr; 307 unsigned long flags; 308 309 /* prevent displaying bogus info during configuration 310 * or deconfiguration of a logical volume 311 */ 312 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 313 if (h->busy_configuring) { 314 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 315 return ERR_PTR(-EBUSY); 316 } 317 h->busy_configuring = 1; 318 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 319 320 if (*pos == 0) 321 cciss_seq_show_header(seq); 322 323 return pos; 324} 325 326static int cciss_seq_show(struct seq_file *seq, void *v) 327{ 328 sector_t vol_sz, vol_sz_frac; 329 ctlr_info_t *h = seq->private; 330 unsigned ctlr = h->ctlr; 331 loff_t *pos = v; 332 drive_info_struct *drv = h->drv[*pos]; 333 334 if (*pos > h->highest_lun) 335 return 0; 336 337 if (drv->heads == 0) 338 return 0; 339 340 vol_sz = drv->nr_blocks; 341 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR); 342 vol_sz_frac *= 100; 343 sector_div(vol_sz_frac, ENG_GIG_FACTOR); 344 345 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN) 346 drv->raid_level = RAID_UNKNOWN; 347 seq_printf(seq, "cciss/c%dd%d:" 348 "\t%4u.%02uGB\tRAID %s\n", 349 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac, 350 raid_label[drv->raid_level]); 351 return 0; 352} 353 354static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos) 355{ 356 ctlr_info_t *h = seq->private; 357 358 if (*pos > h->highest_lun) 359 return NULL; 360 *pos += 1; 361 362 return pos; 363} 364 365static void cciss_seq_stop(struct seq_file *seq, void *v) 366{ 367 ctlr_info_t *h = seq->private; 368 369 /* Only reset h->busy_configuring if we succeeded in setting 370 * it during cciss_seq_start. */ 371 if (v == ERR_PTR(-EBUSY)) 372 return; 373 374 h->busy_configuring = 0; 375} 376 377static const struct seq_operations cciss_seq_ops = { 378 .start = cciss_seq_start, 379 .show = cciss_seq_show, 380 .next = cciss_seq_next, 381 .stop = cciss_seq_stop, 382}; 383 384static int cciss_seq_open(struct inode *inode, struct file *file) 385{ 386 int ret = seq_open(file, &cciss_seq_ops); 387 struct seq_file *seq = file->private_data; 388 389 if (!ret) 390 seq->private = PDE(inode)->data; 391 392 return ret; 393} 394 395static ssize_t 396cciss_proc_write(struct file *file, const char __user *buf, 397 size_t length, loff_t *ppos) 398{ 399 int err; 400 char *buffer; 401 402#ifndef CONFIG_CISS_SCSI_TAPE 403 return -EINVAL; 404#endif 405 406 if (!buf || length > PAGE_SIZE - 1) 407 return -EINVAL; 408 409 buffer = (char *)__get_free_page(GFP_KERNEL); 410 if (!buffer) 411 return -ENOMEM; 412 413 err = -EFAULT; 414 if (copy_from_user(buffer, buf, length)) 415 goto out; 416 buffer[length] = '\0'; 417 418#ifdef CONFIG_CISS_SCSI_TAPE 419 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) { 420 struct seq_file *seq = file->private_data; 421 ctlr_info_t *h = seq->private; 422 int rc; 423 424 rc = cciss_engage_scsi(h->ctlr); 425 if (rc != 0) 426 err = -rc; 427 else 428 err = length; 429 } else 430#endif /* CONFIG_CISS_SCSI_TAPE */ 431 err = -EINVAL; 432 /* might be nice to have "disengage" too, but it's not 433 safely possible. (only 1 module use count, lock issues.) */ 434 435out: 436 free_page((unsigned long)buffer); 437 return err; 438} 439 440static const struct file_operations cciss_proc_fops = { 441 .owner = THIS_MODULE, 442 .open = cciss_seq_open, 443 .read = seq_read, 444 .llseek = seq_lseek, 445 .release = seq_release, 446 .write = cciss_proc_write, 447}; 448 449static void __devinit cciss_procinit(int i) 450{ 451 struct proc_dir_entry *pde; 452 453 if (proc_cciss == NULL) 454 proc_cciss = proc_mkdir("driver/cciss", NULL); 455 if (!proc_cciss) 456 return; 457 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP | 458 S_IROTH, proc_cciss, 459 &cciss_proc_fops, hba[i]); 460} 461#endif /* CONFIG_PROC_FS */ 462 463#define MAX_PRODUCT_NAME_LEN 19 464 465#define to_hba(n) container_of(n, struct ctlr_info, dev) 466#define to_drv(n) container_of(n, drive_info_struct, dev) 467 468static ssize_t host_store_rescan(struct device *dev, 469 struct device_attribute *attr, 470 const char *buf, size_t count) 471{ 472 struct ctlr_info *h = to_hba(dev); 473 474 add_to_scan_list(h); 475 wake_up_process(cciss_scan_thread); 476 wait_for_completion_interruptible(&h->scan_wait); 477 478 return count; 479} 480DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); 481 482static ssize_t dev_show_unique_id(struct device *dev, 483 struct device_attribute *attr, 484 char *buf) 485{ 486 drive_info_struct *drv = to_drv(dev); 487 struct ctlr_info *h = to_hba(drv->dev.parent); 488 __u8 sn[16]; 489 unsigned long flags; 490 int ret = 0; 491 492 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 493 if (h->busy_configuring) 494 ret = -EBUSY; 495 else 496 memcpy(sn, drv->serial_no, sizeof(sn)); 497 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 498 499 if (ret) 500 return ret; 501 else 502 return snprintf(buf, 16 * 2 + 2, 503 "%02X%02X%02X%02X%02X%02X%02X%02X" 504 "%02X%02X%02X%02X%02X%02X%02X%02X\n", 505 sn[0], sn[1], sn[2], sn[3], 506 sn[4], sn[5], sn[6], sn[7], 507 sn[8], sn[9], sn[10], sn[11], 508 sn[12], sn[13], sn[14], sn[15]); 509} 510DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL); 511 512static ssize_t dev_show_vendor(struct device *dev, 513 struct device_attribute *attr, 514 char *buf) 515{ 516 drive_info_struct *drv = to_drv(dev); 517 struct ctlr_info *h = to_hba(drv->dev.parent); 518 char vendor[VENDOR_LEN + 1]; 519 unsigned long flags; 520 int ret = 0; 521 522 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 523 if (h->busy_configuring) 524 ret = -EBUSY; 525 else 526 memcpy(vendor, drv->vendor, VENDOR_LEN + 1); 527 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 528 529 if (ret) 530 return ret; 531 else 532 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor); 533} 534DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL); 535 536static ssize_t dev_show_model(struct device *dev, 537 struct device_attribute *attr, 538 char *buf) 539{ 540 drive_info_struct *drv = to_drv(dev); 541 struct ctlr_info *h = to_hba(drv->dev.parent); 542 char model[MODEL_LEN + 1]; 543 unsigned long flags; 544 int ret = 0; 545 546 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 547 if (h->busy_configuring) 548 ret = -EBUSY; 549 else 550 memcpy(model, drv->model, MODEL_LEN + 1); 551 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 552 553 if (ret) 554 return ret; 555 else 556 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model); 557} 558DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL); 559 560static ssize_t dev_show_rev(struct device *dev, 561 struct device_attribute *attr, 562 char *buf) 563{ 564 drive_info_struct *drv = to_drv(dev); 565 struct ctlr_info *h = to_hba(drv->dev.parent); 566 char rev[REV_LEN + 1]; 567 unsigned long flags; 568 int ret = 0; 569 570 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 571 if (h->busy_configuring) 572 ret = -EBUSY; 573 else 574 memcpy(rev, drv->rev, REV_LEN + 1); 575 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 576 577 if (ret) 578 return ret; 579 else 580 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev); 581} 582DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); 583 584static ssize_t cciss_show_lunid(struct device *dev, 585 struct device_attribute *attr, char *buf) 586{ 587 drive_info_struct *drv = to_drv(dev); 588 struct ctlr_info *h = to_hba(drv->dev.parent); 589 unsigned long flags; 590 unsigned char lunid[8]; 591 592 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 593 if (h->busy_configuring) { 594 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 595 return -EBUSY; 596 } 597 if (!drv->heads) { 598 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 599 return -ENOTTY; 600 } 601 memcpy(lunid, drv->LunID, sizeof(lunid)); 602 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 603 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 604 lunid[0], lunid[1], lunid[2], lunid[3], 605 lunid[4], lunid[5], lunid[6], lunid[7]); 606} 607DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); 608 609static ssize_t cciss_show_raid_level(struct device *dev, 610 struct device_attribute *attr, char *buf) 611{ 612 drive_info_struct *drv = to_drv(dev); 613 struct ctlr_info *h = to_hba(drv->dev.parent); 614 int raid; 615 unsigned long flags; 616 617 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 618 if (h->busy_configuring) { 619 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 620 return -EBUSY; 621 } 622 raid = drv->raid_level; 623 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 624 if (raid < 0 || raid > RAID_UNKNOWN) 625 raid = RAID_UNKNOWN; 626 627 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n", 628 raid_label[raid]); 629} 630DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL); 631 632static ssize_t cciss_show_usage_count(struct device *dev, 633 struct device_attribute *attr, char *buf) 634{ 635 drive_info_struct *drv = to_drv(dev); 636 struct ctlr_info *h = to_hba(drv->dev.parent); 637 unsigned long flags; 638 int count; 639 640 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 641 if (h->busy_configuring) { 642 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 643 return -EBUSY; 644 } 645 count = drv->usage_count; 646 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 647 return snprintf(buf, 20, "%d\n", count); 648} 649DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); 650 651static struct attribute *cciss_host_attrs[] = { 652 &dev_attr_rescan.attr, 653 NULL 654}; 655 656static struct attribute_group cciss_host_attr_group = { 657 .attrs = cciss_host_attrs, 658}; 659 660static const struct attribute_group *cciss_host_attr_groups[] = { 661 &cciss_host_attr_group, 662 NULL 663}; 664 665static struct device_type cciss_host_type = { 666 .name = "cciss_host", 667 .groups = cciss_host_attr_groups, 668 .release = cciss_hba_release, 669}; 670 671static struct attribute *cciss_dev_attrs[] = { 672 &dev_attr_unique_id.attr, 673 &dev_attr_model.attr, 674 &dev_attr_vendor.attr, 675 &dev_attr_rev.attr, 676 &dev_attr_lunid.attr, 677 &dev_attr_raid_level.attr, 678 &dev_attr_usage_count.attr, 679 NULL 680}; 681 682static struct attribute_group cciss_dev_attr_group = { 683 .attrs = cciss_dev_attrs, 684}; 685 686static const struct attribute_group *cciss_dev_attr_groups[] = { 687 &cciss_dev_attr_group, 688 NULL 689}; 690 691static struct device_type cciss_dev_type = { 692 .name = "cciss_device", 693 .groups = cciss_dev_attr_groups, 694 .release = cciss_device_release, 695}; 696 697static struct bus_type cciss_bus_type = { 698 .name = "cciss", 699}; 700 701/* 702 * cciss_hba_release is called when the reference count 703 * of h->dev goes to zero. 704 */ 705static void cciss_hba_release(struct device *dev) 706{ 707 /* 708 * nothing to do, but need this to avoid a warning 709 * about not having a release handler from lib/kref.c. 710 */ 711} 712 713/* 714 * Initialize sysfs entry for each controller. This sets up and registers 715 * the 'cciss#' directory for each individual controller under 716 * /sys/bus/pci/devices/<dev>/. 717 */ 718static int cciss_create_hba_sysfs_entry(struct ctlr_info *h) 719{ 720 device_initialize(&h->dev); 721 h->dev.type = &cciss_host_type; 722 h->dev.bus = &cciss_bus_type; 723 dev_set_name(&h->dev, "%s", h->devname); 724 h->dev.parent = &h->pdev->dev; 725 726 return device_add(&h->dev); 727} 728 729/* 730 * Remove sysfs entries for an hba. 731 */ 732static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h) 733{ 734 device_del(&h->dev); 735 put_device(&h->dev); /* final put. */ 736} 737 738/* cciss_device_release is called when the reference count 739 * of h->drv[x]dev goes to zero. 740 */ 741static void cciss_device_release(struct device *dev) 742{ 743 drive_info_struct *drv = to_drv(dev); 744 kfree(drv); 745} 746 747/* 748 * Initialize sysfs for each logical drive. This sets up and registers 749 * the 'c#d#' directory for each individual logical drive under 750 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from 751 * /sys/block/cciss!c#d# to this entry. 752 */ 753static long cciss_create_ld_sysfs_entry(struct ctlr_info *h, 754 int drv_index) 755{ 756 struct device *dev; 757 758 if (h->drv[drv_index]->device_initialized) 759 return 0; 760 761 dev = &h->drv[drv_index]->dev; 762 device_initialize(dev); 763 dev->type = &cciss_dev_type; 764 dev->bus = &cciss_bus_type; 765 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index); 766 dev->parent = &h->dev; 767 h->drv[drv_index]->device_initialized = 1; 768 return device_add(dev); 769} 770 771/* 772 * Remove sysfs entries for a logical drive. 773 */ 774static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index, 775 int ctlr_exiting) 776{ 777 struct device *dev = &h->drv[drv_index]->dev; 778 779 /* special case for c*d0, we only destroy it on controller exit */ 780 if (drv_index == 0 && !ctlr_exiting) 781 return; 782 783 device_del(dev); 784 put_device(dev); /* the "final" put. */ 785 h->drv[drv_index] = NULL; 786} 787 788/* 789 * For operations that cannot sleep, a command block is allocated at init, 790 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track 791 * which ones are free or in use. For operations that can wait for kmalloc 792 * to possible sleep, this routine can be called with get_from_pool set to 0. 793 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was. 794 */ 795static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool) 796{ 797 CommandList_struct *c; 798 int i; 799 u64bit temp64; 800 dma_addr_t cmd_dma_handle, err_dma_handle; 801 802 if (!get_from_pool) { 803 c = (CommandList_struct *) pci_alloc_consistent(h->pdev, 804 sizeof(CommandList_struct), &cmd_dma_handle); 805 if (c == NULL) 806 return NULL; 807 memset(c, 0, sizeof(CommandList_struct)); 808 809 c->cmdindex = -1; 810 811 c->err_info = (ErrorInfo_struct *) 812 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct), 813 &err_dma_handle); 814 815 if (c->err_info == NULL) { 816 pci_free_consistent(h->pdev, 817 sizeof(CommandList_struct), c, cmd_dma_handle); 818 return NULL; 819 } 820 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 821 } else { /* get it out of the controllers pool */ 822 823 do { 824 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); 825 if (i == h->nr_cmds) 826 return NULL; 827 } while (test_and_set_bit 828 (i & (BITS_PER_LONG - 1), 829 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); 830#ifdef CCISS_DEBUG 831 printk(KERN_DEBUG "cciss: using command buffer %d\n", i); 832#endif 833 c = h->cmd_pool + i; 834 memset(c, 0, sizeof(CommandList_struct)); 835 cmd_dma_handle = h->cmd_pool_dhandle 836 + i * sizeof(CommandList_struct); 837 c->err_info = h->errinfo_pool + i; 838 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 839 err_dma_handle = h->errinfo_pool_dhandle 840 + i * sizeof(ErrorInfo_struct); 841 h->nr_allocs++; 842 843 c->cmdindex = i; 844 } 845 846 INIT_HLIST_NODE(&c->list); 847 c->busaddr = (__u32) cmd_dma_handle; 848 temp64.val = (__u64) err_dma_handle; 849 c->ErrDesc.Addr.lower = temp64.val32.lower; 850 c->ErrDesc.Addr.upper = temp64.val32.upper; 851 c->ErrDesc.Len = sizeof(ErrorInfo_struct); 852 853 c->ctlr = h->ctlr; 854 return c; 855} 856 857/* 858 * Frees a command block that was previously allocated with cmd_alloc(). 859 */ 860static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool) 861{ 862 int i; 863 u64bit temp64; 864 865 if (!got_from_pool) { 866 temp64.val32.lower = c->ErrDesc.Addr.lower; 867 temp64.val32.upper = c->ErrDesc.Addr.upper; 868 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct), 869 c->err_info, (dma_addr_t) temp64.val); 870 pci_free_consistent(h->pdev, sizeof(CommandList_struct), 871 c, (dma_addr_t) c->busaddr); 872 } else { 873 i = c - h->cmd_pool; 874 clear_bit(i & (BITS_PER_LONG - 1), 875 h->cmd_pool_bits + (i / BITS_PER_LONG)); 876 h->nr_frees++; 877 } 878} 879 880static inline ctlr_info_t *get_host(struct gendisk *disk) 881{ 882 return disk->queue->queuedata; 883} 884 885static inline drive_info_struct *get_drv(struct gendisk *disk) 886{ 887 return disk->private_data; 888} 889 890/* 891 * Open. Make sure the device is really there. 892 */ 893static int cciss_open(struct block_device *bdev, fmode_t mode) 894{ 895 ctlr_info_t *host = get_host(bdev->bd_disk); 896 drive_info_struct *drv = get_drv(bdev->bd_disk); 897 898#ifdef CCISS_DEBUG 899 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name); 900#endif /* CCISS_DEBUG */ 901 902 if (drv->busy_configuring) 903 return -EBUSY; 904 /* 905 * Root is allowed to open raw volume zero even if it's not configured 906 * so array config can still work. Root is also allowed to open any 907 * volume that has a LUN ID, so it can issue IOCTL to reread the 908 * disk information. I don't think I really like this 909 * but I'm already using way to many device nodes to claim another one 910 * for "raw controller". 911 */ 912 if (drv->heads == 0) { 913 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */ 914 /* if not node 0 make sure it is a partition = 0 */ 915 if (MINOR(bdev->bd_dev) & 0x0f) { 916 return -ENXIO; 917 /* if it is, make sure we have a LUN ID */ 918 } else if (memcmp(drv->LunID, CTLR_LUNID, 919 sizeof(drv->LunID))) { 920 return -ENXIO; 921 } 922 } 923 if (!capable(CAP_SYS_ADMIN)) 924 return -EPERM; 925 } 926 drv->usage_count++; 927 host->usage_count++; 928 return 0; 929} 930 931/* 932 * Close. Sync first. 933 */ 934static int cciss_release(struct gendisk *disk, fmode_t mode) 935{ 936 ctlr_info_t *host = get_host(disk); 937 drive_info_struct *drv = get_drv(disk); 938 939#ifdef CCISS_DEBUG 940 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name); 941#endif /* CCISS_DEBUG */ 942 943 drv->usage_count--; 944 host->usage_count--; 945 return 0; 946} 947 948#ifdef CONFIG_COMPAT 949 950static int do_ioctl(struct block_device *bdev, fmode_t mode, 951 unsigned cmd, unsigned long arg) 952{ 953 int ret; 954 lock_kernel(); 955 ret = cciss_ioctl(bdev, mode, cmd, arg); 956 unlock_kernel(); 957 return ret; 958} 959 960static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 961 unsigned cmd, unsigned long arg); 962static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 963 unsigned cmd, unsigned long arg); 964 965static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode, 966 unsigned cmd, unsigned long arg) 967{ 968 switch (cmd) { 969 case CCISS_GETPCIINFO: 970 case CCISS_GETINTINFO: 971 case CCISS_SETINTINFO: 972 case CCISS_GETNODENAME: 973 case CCISS_SETNODENAME: 974 case CCISS_GETHEARTBEAT: 975 case CCISS_GETBUSTYPES: 976 case CCISS_GETFIRMVER: 977 case CCISS_GETDRIVVER: 978 case CCISS_REVALIDVOLS: 979 case CCISS_DEREGDISK: 980 case CCISS_REGNEWDISK: 981 case CCISS_REGNEWD: 982 case CCISS_RESCANDISK: 983 case CCISS_GETLUNINFO: 984 return do_ioctl(bdev, mode, cmd, arg); 985 986 case CCISS_PASSTHRU32: 987 return cciss_ioctl32_passthru(bdev, mode, cmd, arg); 988 case CCISS_BIG_PASSTHRU32: 989 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg); 990 991 default: 992 return -ENOIOCTLCMD; 993 } 994} 995 996static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, 997 unsigned cmd, unsigned long arg) 998{ 999 IOCTL32_Command_struct __user *arg32 = 1000 (IOCTL32_Command_struct __user *) arg; 1001 IOCTL_Command_struct arg64; 1002 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); 1003 int err; 1004 u32 cp; 1005 1006 err = 0; 1007 err |= 1008 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 1009 sizeof(arg64.LUN_info)); 1010 err |= 1011 copy_from_user(&arg64.Request, &arg32->Request, 1012 sizeof(arg64.Request)); 1013 err |= 1014 copy_from_user(&arg64.error_info, &arg32->error_info, 1015 sizeof(arg64.error_info)); 1016 err |= get_user(arg64.buf_size, &arg32->buf_size); 1017 err |= get_user(cp, &arg32->buf); 1018 arg64.buf = compat_ptr(cp); 1019 err |= copy_to_user(p, &arg64, sizeof(arg64)); 1020 1021 if (err) 1022 return -EFAULT; 1023 1024 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p); 1025 if (err) 1026 return err; 1027 err |= 1028 copy_in_user(&arg32->error_info, &p->error_info, 1029 sizeof(arg32->error_info)); 1030 if (err) 1031 return -EFAULT; 1032 return err; 1033} 1034 1035static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, 1036 unsigned cmd, unsigned long arg) 1037{ 1038 BIG_IOCTL32_Command_struct __user *arg32 = 1039 (BIG_IOCTL32_Command_struct __user *) arg; 1040 BIG_IOCTL_Command_struct arg64; 1041 BIG_IOCTL_Command_struct __user *p = 1042 compat_alloc_user_space(sizeof(arg64)); 1043 int err; 1044 u32 cp; 1045 1046 err = 0; 1047 err |= 1048 copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 1049 sizeof(arg64.LUN_info)); 1050 err |= 1051 copy_from_user(&arg64.Request, &arg32->Request, 1052 sizeof(arg64.Request)); 1053 err |= 1054 copy_from_user(&arg64.error_info, &arg32->error_info, 1055 sizeof(arg64.error_info)); 1056 err |= get_user(arg64.buf_size, &arg32->buf_size); 1057 err |= get_user(arg64.malloc_size, &arg32->malloc_size); 1058 err |= get_user(cp, &arg32->buf); 1059 arg64.buf = compat_ptr(cp); 1060 err |= copy_to_user(p, &arg64, sizeof(arg64)); 1061 1062 if (err) 1063 return -EFAULT; 1064 1065 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p); 1066 if (err) 1067 return err; 1068 err |= 1069 copy_in_user(&arg32->error_info, &p->error_info, 1070 sizeof(arg32->error_info)); 1071 if (err) 1072 return -EFAULT; 1073 return err; 1074} 1075#endif 1076 1077static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1078{ 1079 drive_info_struct *drv = get_drv(bdev->bd_disk); 1080 1081 if (!drv->cylinders) 1082 return -ENXIO; 1083 1084 geo->heads = drv->heads; 1085 geo->sectors = drv->sectors; 1086 geo->cylinders = drv->cylinders; 1087 return 0; 1088} 1089 1090static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c) 1091{ 1092 if (c->err_info->CommandStatus == CMD_TARGET_STATUS && 1093 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) 1094 (void)check_for_unit_attention(host, c); 1095} 1096/* 1097 * ioctl 1098 */ 1099static int cciss_ioctl(struct block_device *bdev, fmode_t mode, 1100 unsigned int cmd, unsigned long arg) 1101{ 1102 struct gendisk *disk = bdev->bd_disk; 1103 ctlr_info_t *host = get_host(disk); 1104 drive_info_struct *drv = get_drv(disk); 1105 int ctlr = host->ctlr; 1106 void __user *argp = (void __user *)arg; 1107 1108#ifdef CCISS_DEBUG 1109 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg); 1110#endif /* CCISS_DEBUG */ 1111 1112 switch (cmd) { 1113 case CCISS_GETPCIINFO: 1114 { 1115 cciss_pci_info_struct pciinfo; 1116 1117 if (!arg) 1118 return -EINVAL; 1119 pciinfo.domain = pci_domain_nr(host->pdev->bus); 1120 pciinfo.bus = host->pdev->bus->number; 1121 pciinfo.dev_fn = host->pdev->devfn; 1122 pciinfo.board_id = host->board_id; 1123 if (copy_to_user 1124 (argp, &pciinfo, sizeof(cciss_pci_info_struct))) 1125 return -EFAULT; 1126 return 0; 1127 } 1128 case CCISS_GETINTINFO: 1129 { 1130 cciss_coalint_struct intinfo; 1131 if (!arg) 1132 return -EINVAL; 1133 intinfo.delay = 1134 readl(&host->cfgtable->HostWrite.CoalIntDelay); 1135 intinfo.count = 1136 readl(&host->cfgtable->HostWrite.CoalIntCount); 1137 if (copy_to_user 1138 (argp, &intinfo, sizeof(cciss_coalint_struct))) 1139 return -EFAULT; 1140 return 0; 1141 } 1142 case CCISS_SETINTINFO: 1143 { 1144 cciss_coalint_struct intinfo; 1145 unsigned long flags; 1146 int i; 1147 1148 if (!arg) 1149 return -EINVAL; 1150 if (!capable(CAP_SYS_ADMIN)) 1151 return -EPERM; 1152 if (copy_from_user 1153 (&intinfo, argp, sizeof(cciss_coalint_struct))) 1154 return -EFAULT; 1155 if ((intinfo.delay == 0) && (intinfo.count == 0)) 1156 { 1157// printk("cciss_ioctl: delay and count cannot be 0\n"); 1158 return -EINVAL; 1159 } 1160 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1161 /* Update the field, and then ring the doorbell */ 1162 writel(intinfo.delay, 1163 &(host->cfgtable->HostWrite.CoalIntDelay)); 1164 writel(intinfo.count, 1165 &(host->cfgtable->HostWrite.CoalIntCount)); 1166 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1167 1168 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1169 if (!(readl(host->vaddr + SA5_DOORBELL) 1170 & CFGTBL_ChangeReq)) 1171 break; 1172 /* delay and try again */ 1173 udelay(1000); 1174 } 1175 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1176 if (i >= MAX_IOCTL_CONFIG_WAIT) 1177 return -EAGAIN; 1178 return 0; 1179 } 1180 case CCISS_GETNODENAME: 1181 { 1182 NodeName_type NodeName; 1183 int i; 1184 1185 if (!arg) 1186 return -EINVAL; 1187 for (i = 0; i < 16; i++) 1188 NodeName[i] = 1189 readb(&host->cfgtable->ServerName[i]); 1190 if (copy_to_user(argp, NodeName, sizeof(NodeName_type))) 1191 return -EFAULT; 1192 return 0; 1193 } 1194 case CCISS_SETNODENAME: 1195 { 1196 NodeName_type NodeName; 1197 unsigned long flags; 1198 int i; 1199 1200 if (!arg) 1201 return -EINVAL; 1202 if (!capable(CAP_SYS_ADMIN)) 1203 return -EPERM; 1204 1205 if (copy_from_user 1206 (NodeName, argp, sizeof(NodeName_type))) 1207 return -EFAULT; 1208 1209 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1210 1211 /* Update the field, and then ring the doorbell */ 1212 for (i = 0; i < 16; i++) 1213 writeb(NodeName[i], 1214 &host->cfgtable->ServerName[i]); 1215 1216 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); 1217 1218 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { 1219 if (!(readl(host->vaddr + SA5_DOORBELL) 1220 & CFGTBL_ChangeReq)) 1221 break; 1222 /* delay and try again */ 1223 udelay(1000); 1224 } 1225 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1226 if (i >= MAX_IOCTL_CONFIG_WAIT) 1227 return -EAGAIN; 1228 return 0; 1229 } 1230 1231 case CCISS_GETHEARTBEAT: 1232 { 1233 Heartbeat_type heartbeat; 1234 1235 if (!arg) 1236 return -EINVAL; 1237 heartbeat = readl(&host->cfgtable->HeartBeat); 1238 if (copy_to_user 1239 (argp, &heartbeat, sizeof(Heartbeat_type))) 1240 return -EFAULT; 1241 return 0; 1242 } 1243 case CCISS_GETBUSTYPES: 1244 { 1245 BusTypes_type BusTypes; 1246 1247 if (!arg) 1248 return -EINVAL; 1249 BusTypes = readl(&host->cfgtable->BusTypes); 1250 if (copy_to_user 1251 (argp, &BusTypes, sizeof(BusTypes_type))) 1252 return -EFAULT; 1253 return 0; 1254 } 1255 case CCISS_GETFIRMVER: 1256 { 1257 FirmwareVer_type firmware; 1258 1259 if (!arg) 1260 return -EINVAL; 1261 memcpy(firmware, host->firm_ver, 4); 1262 1263 if (copy_to_user 1264 (argp, firmware, sizeof(FirmwareVer_type))) 1265 return -EFAULT; 1266 return 0; 1267 } 1268 case CCISS_GETDRIVVER: 1269 { 1270 DriverVer_type DriverVer = DRIVER_VERSION; 1271 1272 if (!arg) 1273 return -EINVAL; 1274 1275 if (copy_to_user 1276 (argp, &DriverVer, sizeof(DriverVer_type))) 1277 return -EFAULT; 1278 return 0; 1279 } 1280 1281 case CCISS_DEREGDISK: 1282 case CCISS_REGNEWD: 1283 case CCISS_REVALIDVOLS: 1284 return rebuild_lun_table(host, 0, 1); 1285 1286 case CCISS_GETLUNINFO:{ 1287 LogvolInfo_struct luninfo; 1288 1289 memcpy(&luninfo.LunID, drv->LunID, 1290 sizeof(luninfo.LunID)); 1291 luninfo.num_opens = drv->usage_count; 1292 luninfo.num_parts = 0; 1293 if (copy_to_user(argp, &luninfo, 1294 sizeof(LogvolInfo_struct))) 1295 return -EFAULT; 1296 return 0; 1297 } 1298 case CCISS_PASSTHRU: 1299 { 1300 IOCTL_Command_struct iocommand; 1301 CommandList_struct *c; 1302 char *buff = NULL; 1303 u64bit temp64; 1304 unsigned long flags; 1305 DECLARE_COMPLETION_ONSTACK(wait); 1306 1307 if (!arg) 1308 return -EINVAL; 1309 1310 if (!capable(CAP_SYS_RAWIO)) 1311 return -EPERM; 1312 1313 if (copy_from_user 1314 (&iocommand, argp, sizeof(IOCTL_Command_struct))) 1315 return -EFAULT; 1316 if ((iocommand.buf_size < 1) && 1317 (iocommand.Request.Type.Direction != XFER_NONE)) { 1318 return -EINVAL; 1319 } 1320#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */ 1321 /* Check kmalloc limits */ 1322 if (iocommand.buf_size > 128000) 1323 return -EINVAL; 1324#endif 1325 if (iocommand.buf_size > 0) { 1326 buff = kmalloc(iocommand.buf_size, GFP_KERNEL); 1327 if (buff == NULL) 1328 return -EFAULT; 1329 } 1330 if (iocommand.Request.Type.Direction == XFER_WRITE) { 1331 /* Copy the data into the buffer we created */ 1332 if (copy_from_user 1333 (buff, iocommand.buf, iocommand.buf_size)) { 1334 kfree(buff); 1335 return -EFAULT; 1336 } 1337 } else { 1338 memset(buff, 0, iocommand.buf_size); 1339 } 1340 if ((c = cmd_alloc(host, 0)) == NULL) { 1341 kfree(buff); 1342 return -ENOMEM; 1343 } 1344 // Fill in the command type 1345 c->cmd_type = CMD_IOCTL_PEND; 1346 // Fill in Command Header 1347 c->Header.ReplyQueue = 0; // unused in simple mode 1348 if (iocommand.buf_size > 0) // buffer to fill 1349 { 1350 c->Header.SGList = 1; 1351 c->Header.SGTotal = 1; 1352 } else // no buffers to fill 1353 { 1354 c->Header.SGList = 0; 1355 c->Header.SGTotal = 0; 1356 } 1357 c->Header.LUN = iocommand.LUN_info; 1358 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag 1359 1360 // Fill in Request block 1361 c->Request = iocommand.Request; 1362 1363 // Fill in the scatter gather information 1364 if (iocommand.buf_size > 0) { 1365 temp64.val = pci_map_single(host->pdev, buff, 1366 iocommand.buf_size, 1367 PCI_DMA_BIDIRECTIONAL); 1368 c->SG[0].Addr.lower = temp64.val32.lower; 1369 c->SG[0].Addr.upper = temp64.val32.upper; 1370 c->SG[0].Len = iocommand.buf_size; 1371 c->SG[0].Ext = 0; // we are not chaining 1372 } 1373 c->waiting = &wait; 1374 1375 /* Put the request on the tail of the request queue */ 1376 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1377 addQ(&host->reqQ, c); 1378 host->Qdepth++; 1379 start_io(host); 1380 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1381 1382 wait_for_completion(&wait); 1383 1384 /* unlock the buffers from DMA */ 1385 temp64.val32.lower = c->SG[0].Addr.lower; 1386 temp64.val32.upper = c->SG[0].Addr.upper; 1387 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val, 1388 iocommand.buf_size, 1389 PCI_DMA_BIDIRECTIONAL); 1390 1391 check_ioctl_unit_attention(host, c); 1392 1393 /* Copy the error information out */ 1394 iocommand.error_info = *(c->err_info); 1395 if (copy_to_user 1396 (argp, &iocommand, sizeof(IOCTL_Command_struct))) { 1397 kfree(buff); 1398 cmd_free(host, c, 0); 1399 return -EFAULT; 1400 } 1401 1402 if (iocommand.Request.Type.Direction == XFER_READ) { 1403 /* Copy the data out of the buffer we created */ 1404 if (copy_to_user 1405 (iocommand.buf, buff, iocommand.buf_size)) { 1406 kfree(buff); 1407 cmd_free(host, c, 0); 1408 return -EFAULT; 1409 } 1410 } 1411 kfree(buff); 1412 cmd_free(host, c, 0); 1413 return 0; 1414 } 1415 case CCISS_BIG_PASSTHRU:{ 1416 BIG_IOCTL_Command_struct *ioc; 1417 CommandList_struct *c; 1418 unsigned char **buff = NULL; 1419 int *buff_size = NULL; 1420 u64bit temp64; 1421 unsigned long flags; 1422 BYTE sg_used = 0; 1423 int status = 0; 1424 int i; 1425 DECLARE_COMPLETION_ONSTACK(wait); 1426 __u32 left; 1427 __u32 sz; 1428 BYTE __user *data_ptr; 1429 1430 if (!arg) 1431 return -EINVAL; 1432 if (!capable(CAP_SYS_RAWIO)) 1433 return -EPERM; 1434 ioc = (BIG_IOCTL_Command_struct *) 1435 kmalloc(sizeof(*ioc), GFP_KERNEL); 1436 if (!ioc) { 1437 status = -ENOMEM; 1438 goto cleanup1; 1439 } 1440 if (copy_from_user(ioc, argp, sizeof(*ioc))) { 1441 status = -EFAULT; 1442 goto cleanup1; 1443 } 1444 if ((ioc->buf_size < 1) && 1445 (ioc->Request.Type.Direction != XFER_NONE)) { 1446 status = -EINVAL; 1447 goto cleanup1; 1448 } 1449 /* Check kmalloc limits using all SGs */ 1450 if (ioc->malloc_size > MAX_KMALLOC_SIZE) { 1451 status = -EINVAL; 1452 goto cleanup1; 1453 } 1454 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { 1455 status = -EINVAL; 1456 goto cleanup1; 1457 } 1458 buff = 1459 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); 1460 if (!buff) { 1461 status = -ENOMEM; 1462 goto cleanup1; 1463 } 1464 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), 1465 GFP_KERNEL); 1466 if (!buff_size) { 1467 status = -ENOMEM; 1468 goto cleanup1; 1469 } 1470 left = ioc->buf_size; 1471 data_ptr = ioc->buf; 1472 while (left) { 1473 sz = (left > 1474 ioc->malloc_size) ? ioc-> 1475 malloc_size : left; 1476 buff_size[sg_used] = sz; 1477 buff[sg_used] = kmalloc(sz, GFP_KERNEL); 1478 if (buff[sg_used] == NULL) { 1479 status = -ENOMEM; 1480 goto cleanup1; 1481 } 1482 if (ioc->Request.Type.Direction == XFER_WRITE) { 1483 if (copy_from_user 1484 (buff[sg_used], data_ptr, sz)) { 1485 status = -EFAULT; 1486 goto cleanup1; 1487 } 1488 } else { 1489 memset(buff[sg_used], 0, sz); 1490 } 1491 left -= sz; 1492 data_ptr += sz; 1493 sg_used++; 1494 } 1495 if ((c = cmd_alloc(host, 0)) == NULL) { 1496 status = -ENOMEM; 1497 goto cleanup1; 1498 } 1499 c->cmd_type = CMD_IOCTL_PEND; 1500 c->Header.ReplyQueue = 0; 1501 1502 if (ioc->buf_size > 0) { 1503 c->Header.SGList = sg_used; 1504 c->Header.SGTotal = sg_used; 1505 } else { 1506 c->Header.SGList = 0; 1507 c->Header.SGTotal = 0; 1508 } 1509 c->Header.LUN = ioc->LUN_info; 1510 c->Header.Tag.lower = c->busaddr; 1511 1512 c->Request = ioc->Request; 1513 if (ioc->buf_size > 0) { 1514 int i; 1515 for (i = 0; i < sg_used; i++) { 1516 temp64.val = 1517 pci_map_single(host->pdev, buff[i], 1518 buff_size[i], 1519 PCI_DMA_BIDIRECTIONAL); 1520 c->SG[i].Addr.lower = 1521 temp64.val32.lower; 1522 c->SG[i].Addr.upper = 1523 temp64.val32.upper; 1524 c->SG[i].Len = buff_size[i]; 1525 c->SG[i].Ext = 0; /* we are not chaining */ 1526 } 1527 } 1528 c->waiting = &wait; 1529 /* Put the request on the tail of the request queue */ 1530 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 1531 addQ(&host->reqQ, c); 1532 host->Qdepth++; 1533 start_io(host); 1534 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 1535 wait_for_completion(&wait); 1536 /* unlock the buffers from DMA */ 1537 for (i = 0; i < sg_used; i++) { 1538 temp64.val32.lower = c->SG[i].Addr.lower; 1539 temp64.val32.upper = c->SG[i].Addr.upper; 1540 pci_unmap_single(host->pdev, 1541 (dma_addr_t) temp64.val, buff_size[i], 1542 PCI_DMA_BIDIRECTIONAL); 1543 } 1544 check_ioctl_unit_attention(host, c); 1545 /* Copy the error information out */ 1546 ioc->error_info = *(c->err_info); 1547 if (copy_to_user(argp, ioc, sizeof(*ioc))) { 1548 cmd_free(host, c, 0); 1549 status = -EFAULT; 1550 goto cleanup1; 1551 } 1552 if (ioc->Request.Type.Direction == XFER_READ) { 1553 /* Copy the data out of the buffer we created */ 1554 BYTE __user *ptr = ioc->buf; 1555 for (i = 0; i < sg_used; i++) { 1556 if (copy_to_user 1557 (ptr, buff[i], buff_size[i])) { 1558 cmd_free(host, c, 0); 1559 status = -EFAULT; 1560 goto cleanup1; 1561 } 1562 ptr += buff_size[i]; 1563 } 1564 } 1565 cmd_free(host, c, 0); 1566 status = 0; 1567 cleanup1: 1568 if (buff) { 1569 for (i = 0; i < sg_used; i++) 1570 kfree(buff[i]); 1571 kfree(buff); 1572 } 1573 kfree(buff_size); 1574 kfree(ioc); 1575 return status; 1576 } 1577 1578 /* scsi_cmd_ioctl handles these, below, though some are not */ 1579 /* very meaningful for cciss. SG_IO is the main one people want. */ 1580 1581 case SG_GET_VERSION_NUM: 1582 case SG_SET_TIMEOUT: 1583 case SG_GET_TIMEOUT: 1584 case SG_GET_RESERVED_SIZE: 1585 case SG_SET_RESERVED_SIZE: 1586 case SG_EMULATED_HOST: 1587 case SG_IO: 1588 case SCSI_IOCTL_SEND_COMMAND: 1589 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); 1590 1591 /* scsi_cmd_ioctl would normally handle these, below, but */ 1592 /* they aren't a good fit for cciss, as CD-ROMs are */ 1593 /* not supported, and we don't have any bus/target/lun */ 1594 /* which we present to the kernel. */ 1595 1596 case CDROM_SEND_PACKET: 1597 case CDROMCLOSETRAY: 1598 case CDROMEJECT: 1599 case SCSI_IOCTL_GET_IDLUN: 1600 case SCSI_IOCTL_GET_BUS_NUMBER: 1601 default: 1602 return -ENOTTY; 1603 } 1604} 1605 1606static void cciss_check_queues(ctlr_info_t *h) 1607{ 1608 int start_queue = h->next_to_run; 1609 int i; 1610 1611 /* check to see if we have maxed out the number of commands that can 1612 * be placed on the queue. If so then exit. We do this check here 1613 * in case the interrupt we serviced was from an ioctl and did not 1614 * free any new commands. 1615 */ 1616 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) 1617 return; 1618 1619 /* We have room on the queue for more commands. Now we need to queue 1620 * them up. We will also keep track of the next queue to run so 1621 * that every queue gets a chance to be started first. 1622 */ 1623 for (i = 0; i < h->highest_lun + 1; i++) { 1624 int curr_queue = (start_queue + i) % (h->highest_lun + 1); 1625 /* make sure the disk has been added and the drive is real 1626 * because this can be called from the middle of init_one. 1627 */ 1628 if (!h->drv[curr_queue]) 1629 continue; 1630 if (!(h->drv[curr_queue]->queue) || 1631 !(h->drv[curr_queue]->heads)) 1632 continue; 1633 blk_start_queue(h->gendisk[curr_queue]->queue); 1634 1635 /* check to see if we have maxed out the number of commands 1636 * that can be placed on the queue. 1637 */ 1638 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) { 1639 if (curr_queue == start_queue) { 1640 h->next_to_run = 1641 (start_queue + 1) % (h->highest_lun + 1); 1642 break; 1643 } else { 1644 h->next_to_run = curr_queue; 1645 break; 1646 } 1647 } 1648 } 1649} 1650 1651static void cciss_softirq_done(struct request *rq) 1652{ 1653 CommandList_struct *cmd = rq->completion_data; 1654 ctlr_info_t *h = hba[cmd->ctlr]; 1655 unsigned long flags; 1656 u64bit temp64; 1657 int i, ddir; 1658 1659 if (cmd->Request.Type.Direction == XFER_READ) 1660 ddir = PCI_DMA_FROMDEVICE; 1661 else 1662 ddir = PCI_DMA_TODEVICE; 1663 1664 /* command did not need to be retried */ 1665 /* unmap the DMA mapping for all the scatter gather elements */ 1666 for (i = 0; i < cmd->Header.SGList; i++) { 1667 temp64.val32.lower = cmd->SG[i].Addr.lower; 1668 temp64.val32.upper = cmd->SG[i].Addr.upper; 1669 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir); 1670 } 1671 1672#ifdef CCISS_DEBUG 1673 printk("Done with %p\n", rq); 1674#endif /* CCISS_DEBUG */ 1675 1676 /* set the residual count for pc requests */ 1677 if (blk_pc_request(rq)) 1678 rq->resid_len = cmd->err_info->ResidualCnt; 1679 1680 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO); 1681 1682 spin_lock_irqsave(&h->lock, flags); 1683 cmd_free(h, cmd, 1); 1684 cciss_check_queues(h); 1685 spin_unlock_irqrestore(&h->lock, flags); 1686} 1687 1688static inline void log_unit_to_scsi3addr(ctlr_info_t *h, 1689 unsigned char scsi3addr[], uint32_t log_unit) 1690{ 1691 memcpy(scsi3addr, h->drv[log_unit]->LunID, 1692 sizeof(h->drv[log_unit]->LunID)); 1693} 1694 1695/* This function gets the SCSI vendor, model, and revision of a logical drive 1696 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if 1697 * they cannot be read. 1698 */ 1699static void cciss_get_device_descr(int ctlr, int logvol, int withirq, 1700 char *vendor, char *model, char *rev) 1701{ 1702 int rc; 1703 InquiryData_struct *inq_buf; 1704 unsigned char scsi3addr[8]; 1705 1706 *vendor = '\0'; 1707 *model = '\0'; 1708 *rev = '\0'; 1709 1710 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1711 if (!inq_buf) 1712 return; 1713 1714 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1715 if (withirq) 1716 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, 1717 sizeof(InquiryData_struct), 0, 1718 scsi3addr, TYPE_CMD); 1719 else 1720 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf, 1721 sizeof(InquiryData_struct), 0, 1722 scsi3addr, TYPE_CMD); 1723 if (rc == IO_OK) { 1724 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN); 1725 vendor[VENDOR_LEN] = '\0'; 1726 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN); 1727 model[MODEL_LEN] = '\0'; 1728 memcpy(rev, &inq_buf->data_byte[32], REV_LEN); 1729 rev[REV_LEN] = '\0'; 1730 } 1731 1732 kfree(inq_buf); 1733 return; 1734} 1735 1736/* This function gets the serial number of a logical drive via 1737 * inquiry page 0x83. Serial no. is 16 bytes. If the serial 1738 * number cannot be had, for whatever reason, 16 bytes of 0xff 1739 * are returned instead. 1740 */ 1741static void cciss_get_serial_no(int ctlr, int logvol, int withirq, 1742 unsigned char *serial_no, int buflen) 1743{ 1744#define PAGE_83_INQ_BYTES 64 1745 int rc; 1746 unsigned char *buf; 1747 unsigned char scsi3addr[8]; 1748 1749 if (buflen > 16) 1750 buflen = 16; 1751 memset(serial_no, 0xff, buflen); 1752 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); 1753 if (!buf) 1754 return; 1755 memset(serial_no, 0, buflen); 1756 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 1757 if (withirq) 1758 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf, 1759 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); 1760 else 1761 rc = sendcmd(CISS_INQUIRY, ctlr, buf, 1762 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); 1763 if (rc == IO_OK) 1764 memcpy(serial_no, &buf[8], buflen); 1765 kfree(buf); 1766 return; 1767} 1768 1769/* 1770 * cciss_add_disk sets up the block device queue for a logical drive 1771 */ 1772static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, 1773 int drv_index) 1774{ 1775 disk->queue = blk_init_queue(do_cciss_request, &h->lock); 1776 if (!disk->queue) 1777 goto init_queue_failure; 1778 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index); 1779 disk->major = h->major; 1780 disk->first_minor = drv_index << NWD_SHIFT; 1781 disk->fops = &cciss_fops; 1782 if (cciss_create_ld_sysfs_entry(h, drv_index)) 1783 goto cleanup_queue; 1784 disk->private_data = h->drv[drv_index]; 1785 disk->driverfs_dev = &h->drv[drv_index]->dev; 1786 1787 /* Set up queue information */ 1788 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); 1789 1790 /* This is a hardware imposed limit. */ 1791 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES); 1792 1793 /* This is a limit in the driver and could be eliminated. */ 1794 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES); 1795 1796 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors); 1797 1798 blk_queue_softirq_done(disk->queue, cciss_softirq_done); 1799 1800 disk->queue->queuedata = h; 1801 1802 blk_queue_logical_block_size(disk->queue, 1803 h->drv[drv_index]->block_size); 1804 1805 /* Make sure all queue data is written out before */ 1806 /* setting h->drv[drv_index]->queue, as setting this */ 1807 /* allows the interrupt handler to start the queue */ 1808 wmb(); 1809 h->drv[drv_index]->queue = disk->queue; 1810 add_disk(disk); 1811 return 0; 1812 1813cleanup_queue: 1814 blk_cleanup_queue(disk->queue); 1815 disk->queue = NULL; 1816init_queue_failure: 1817 return -1; 1818} 1819 1820/* This function will check the usage_count of the drive to be updated/added. 1821 * If the usage_count is zero and it is a heretofore unknown drive, or, 1822 * the drive's capacity, geometry, or serial number has changed, 1823 * then the drive information will be updated and the disk will be 1824 * re-registered with the kernel. If these conditions don't hold, 1825 * then it will be left alone for the next reboot. The exception to this 1826 * is disk 0 which will always be left registered with the kernel since it 1827 * is also the controller node. Any changes to disk 0 will show up on 1828 * the next reboot. 1829 */ 1830static void cciss_update_drive_info(int ctlr, int drv_index, int first_time, 1831 int via_ioctl) 1832{ 1833 ctlr_info_t *h = hba[ctlr]; 1834 struct gendisk *disk; 1835 InquiryData_struct *inq_buff = NULL; 1836 unsigned int block_size; 1837 sector_t total_size; 1838 unsigned long flags = 0; 1839 int ret = 0; 1840 drive_info_struct *drvinfo; 1841 1842 /* Get information about the disk and modify the driver structure */ 1843 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 1844 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL); 1845 if (inq_buff == NULL || drvinfo == NULL) 1846 goto mem_msg; 1847 1848 /* testing to see if 16-byte CDBs are already being used */ 1849 if (h->cciss_read == CCISS_READ_16) { 1850 cciss_read_capacity_16(h->ctlr, drv_index, 1, 1851 &total_size, &block_size); 1852 1853 } else { 1854 cciss_read_capacity(ctlr, drv_index, 1, 1855 &total_size, &block_size); 1856 1857 /* if read_capacity returns all F's this volume is >2TB */ 1858 /* in size so we switch to 16-byte CDB's for all */ 1859 /* read/write ops */ 1860 if (total_size == 0xFFFFFFFFULL) { 1861 cciss_read_capacity_16(ctlr, drv_index, 1, 1862 &total_size, &block_size); 1863 h->cciss_read = CCISS_READ_16; 1864 h->cciss_write = CCISS_WRITE_16; 1865 } else { 1866 h->cciss_read = CCISS_READ_10; 1867 h->cciss_write = CCISS_WRITE_10; 1868 } 1869 } 1870 1871 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size, 1872 inq_buff, drvinfo); 1873 drvinfo->block_size = block_size; 1874 drvinfo->nr_blocks = total_size + 1; 1875 1876 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor, 1877 drvinfo->model, drvinfo->rev); 1878 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no, 1879 sizeof(drvinfo->serial_no)); 1880 /* Save the lunid in case we deregister the disk, below. */ 1881 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID, 1882 sizeof(drvinfo->LunID)); 1883 1884 /* Is it the same disk we already know, and nothing's changed? */ 1885 if (h->drv[drv_index]->raid_level != -1 && 1886 ((memcmp(drvinfo->serial_no, 1887 h->drv[drv_index]->serial_no, 16) == 0) && 1888 drvinfo->block_size == h->drv[drv_index]->block_size && 1889 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks && 1890 drvinfo->heads == h->drv[drv_index]->heads && 1891 drvinfo->sectors == h->drv[drv_index]->sectors && 1892 drvinfo->cylinders == h->drv[drv_index]->cylinders)) 1893 /* The disk is unchanged, nothing to update */ 1894 goto freeret; 1895 1896 /* If we get here it's not the same disk, or something's changed, 1897 * so we need to * deregister it, and re-register it, if it's not 1898 * in use. 1899 * If the disk already exists then deregister it before proceeding 1900 * (unless it's the first disk (for the controller node). 1901 */ 1902 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) { 1903 printk(KERN_WARNING "disk %d has changed.\n", drv_index); 1904 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 1905 h->drv[drv_index]->busy_configuring = 1; 1906 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 1907 1908 /* deregister_disk sets h->drv[drv_index]->queue = NULL 1909 * which keeps the interrupt handler from starting 1910 * the queue. 1911 */ 1912 ret = deregister_disk(h, drv_index, 0, via_ioctl); 1913 } 1914 1915 /* If the disk is in use return */ 1916 if (ret) 1917 goto freeret; 1918 1919 /* Save the new information from cciss_geometry_inquiry 1920 * and serial number inquiry. If the disk was deregistered 1921 * above, then h->drv[drv_index] will be NULL. 1922 */ 1923 if (h->drv[drv_index] == NULL) { 1924 drvinfo->device_initialized = 0; 1925 h->drv[drv_index] = drvinfo; 1926 drvinfo = NULL; /* so it won't be freed below. */ 1927 } else { 1928 /* special case for cxd0 */ 1929 h->drv[drv_index]->block_size = drvinfo->block_size; 1930 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks; 1931 h->drv[drv_index]->heads = drvinfo->heads; 1932 h->drv[drv_index]->sectors = drvinfo->sectors; 1933 h->drv[drv_index]->cylinders = drvinfo->cylinders; 1934 h->drv[drv_index]->raid_level = drvinfo->raid_level; 1935 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16); 1936 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor, 1937 VENDOR_LEN + 1); 1938 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1); 1939 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1); 1940 } 1941 1942 ++h->num_luns; 1943 disk = h->gendisk[drv_index]; 1944 set_capacity(disk, h->drv[drv_index]->nr_blocks); 1945 1946 /* If it's not disk 0 (drv_index != 0) 1947 * or if it was disk 0, but there was previously 1948 * no actual corresponding configured logical drive 1949 * (raid_leve == -1) then we want to update the 1950 * logical drive's information. 1951 */ 1952 if (drv_index || first_time) { 1953 if (cciss_add_disk(h, disk, drv_index) != 0) { 1954 cciss_free_gendisk(h, drv_index); 1955 cciss_free_drive_info(h, drv_index); 1956 printk(KERN_WARNING "cciss:%d could not update " 1957 "disk %d\n", h->ctlr, drv_index); 1958 --h->num_luns; 1959 } 1960 } 1961 1962freeret: 1963 kfree(inq_buff); 1964 kfree(drvinfo); 1965 return; 1966mem_msg: 1967 printk(KERN_ERR "cciss: out of memory\n"); 1968 goto freeret; 1969} 1970 1971/* This function will find the first index of the controllers drive array 1972 * that has a null drv pointer and allocate the drive info struct and 1973 * will return that index This is where new drives will be added. 1974 * If the index to be returned is greater than the highest_lun index for 1975 * the controller then highest_lun is set * to this new index. 1976 * If there are no available indexes or if tha allocation fails, then -1 1977 * is returned. * "controller_node" is used to know if this is a real 1978 * logical drive, or just the controller node, which determines if this 1979 * counts towards highest_lun. 1980 */ 1981static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node) 1982{ 1983 int i; 1984 drive_info_struct *drv; 1985 1986 /* Search for an empty slot for our drive info */ 1987 for (i = 0; i < CISS_MAX_LUN; i++) { 1988 1989 /* if not cxd0 case, and it's occupied, skip it. */ 1990 if (h->drv[i] && i != 0) 1991 continue; 1992 /* 1993 * If it's cxd0 case, and drv is alloc'ed already, and a 1994 * disk is configured there, skip it. 1995 */ 1996 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1) 1997 continue; 1998 1999 /* 2000 * We've found an empty slot. Update highest_lun 2001 * provided this isn't just the fake cxd0 controller node. 2002 */ 2003 if (i > h->highest_lun && !controller_node) 2004 h->highest_lun = i; 2005 2006 /* If adding a real disk at cxd0, and it's already alloc'ed */ 2007 if (i == 0 && h->drv[i] != NULL) 2008 return i; 2009 2010 /* 2011 * Found an empty slot, not already alloc'ed. Allocate it. 2012 * Mark it with raid_level == -1, so we know it's new later on. 2013 */ 2014 drv = kzalloc(sizeof(*drv), GFP_KERNEL); 2015 if (!drv) 2016 return -1; 2017 drv->raid_level = -1; /* so we know it's new */ 2018 h->drv[i] = drv; 2019 return i; 2020 } 2021 return -1; 2022} 2023 2024static void cciss_free_drive_info(ctlr_info_t *h, int drv_index) 2025{ 2026 kfree(h->drv[drv_index]); 2027 h->drv[drv_index] = NULL; 2028} 2029 2030static void cciss_free_gendisk(ctlr_info_t *h, int drv_index) 2031{ 2032 put_disk(h->gendisk[drv_index]); 2033 h->gendisk[drv_index] = NULL; 2034} 2035 2036/* cciss_add_gendisk finds a free hba[]->drv structure 2037 * and allocates a gendisk if needed, and sets the lunid 2038 * in the drvinfo structure. It returns the index into 2039 * the ->drv[] array, or -1 if none are free. 2040 * is_controller_node indicates whether highest_lun should 2041 * count this disk, or if it's only being added to provide 2042 * a means to talk to the controller in case no logical 2043 * drives have yet been configured. 2044 */ 2045static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[], 2046 int controller_node) 2047{ 2048 int drv_index; 2049 2050 drv_index = cciss_alloc_drive_info(h, controller_node); 2051 if (drv_index == -1) 2052 return -1; 2053 2054 /*Check if the gendisk needs to be allocated */ 2055 if (!h->gendisk[drv_index]) { 2056 h->gendisk[drv_index] = 2057 alloc_disk(1 << NWD_SHIFT); 2058 if (!h->gendisk[drv_index]) { 2059 printk(KERN_ERR "cciss%d: could not " 2060 "allocate a new disk %d\n", 2061 h->ctlr, drv_index); 2062 goto err_free_drive_info; 2063 } 2064 } 2065 memcpy(h->drv[drv_index]->LunID, lunid, 2066 sizeof(h->drv[drv_index]->LunID)); 2067 if (cciss_create_ld_sysfs_entry(h, drv_index)) 2068 goto err_free_disk; 2069 /* Don't need to mark this busy because nobody */ 2070 /* else knows about this disk yet to contend */ 2071 /* for access to it. */ 2072 h->drv[drv_index]->busy_configuring = 0; 2073 wmb(); 2074 return drv_index; 2075 2076err_free_disk: 2077 cciss_free_gendisk(h, drv_index); 2078err_free_drive_info: 2079 cciss_free_drive_info(h, drv_index); 2080 return -1; 2081} 2082 2083/* This is for the special case of a controller which 2084 * has no logical drives. In this case, we still need 2085 * to register a disk so the controller can be accessed 2086 * by the Array Config Utility. 2087 */ 2088static void cciss_add_controller_node(ctlr_info_t *h) 2089{ 2090 struct gendisk *disk; 2091 int drv_index; 2092 2093 if (h->gendisk[0] != NULL) /* already did this? Then bail. */ 2094 return; 2095 2096 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1); 2097 if (drv_index == -1) 2098 goto error; 2099 h->drv[drv_index]->block_size = 512; 2100 h->drv[drv_index]->nr_blocks = 0; 2101 h->drv[drv_index]->heads = 0; 2102 h->drv[drv_index]->sectors = 0; 2103 h->drv[drv_index]->cylinders = 0; 2104 h->drv[drv_index]->raid_level = -1; 2105 memset(h->drv[drv_index]->serial_no, 0, 16); 2106 disk = h->gendisk[drv_index]; 2107 if (cciss_add_disk(h, disk, drv_index) == 0) 2108 return; 2109 cciss_free_gendisk(h, drv_index); 2110 cciss_free_drive_info(h, drv_index); 2111error: 2112 printk(KERN_WARNING "cciss%d: could not " 2113 "add disk 0.\n", h->ctlr); 2114 return; 2115} 2116 2117/* This function will add and remove logical drives from the Logical 2118 * drive array of the controller and maintain persistency of ordering 2119 * so that mount points are preserved until the next reboot. This allows 2120 * for the removal of logical drives in the middle of the drive array 2121 * without a re-ordering of those drives. 2122 * INPUT 2123 * h = The controller to perform the operations on 2124 */ 2125static int rebuild_lun_table(ctlr_info_t *h, int first_time, 2126 int via_ioctl) 2127{ 2128 int ctlr = h->ctlr; 2129 int num_luns; 2130 ReportLunData_struct *ld_buff = NULL; 2131 int return_code; 2132 int listlength = 0; 2133 int i; 2134 int drv_found; 2135 int drv_index = 0; 2136 unsigned char lunid[8] = CTLR_LUNID; 2137 unsigned long flags; 2138 2139 if (!capable(CAP_SYS_RAWIO)) 2140 return -EPERM; 2141 2142 /* Set busy_configuring flag for this operation */ 2143 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2144 if (h->busy_configuring) { 2145 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2146 return -EBUSY; 2147 } 2148 h->busy_configuring = 1; 2149 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2150 2151 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); 2152 if (ld_buff == NULL) 2153 goto mem_msg; 2154 2155 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff, 2156 sizeof(ReportLunData_struct), 2157 0, CTLR_LUNID, TYPE_CMD); 2158 2159 if (return_code == IO_OK) 2160 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); 2161 else { /* reading number of logical volumes failed */ 2162 printk(KERN_WARNING "cciss: report logical volume" 2163 " command failed\n"); 2164 listlength = 0; 2165 goto freeret; 2166 } 2167 2168 num_luns = listlength / 8; /* 8 bytes per entry */ 2169 if (num_luns > CISS_MAX_LUN) { 2170 num_luns = CISS_MAX_LUN; 2171 printk(KERN_WARNING "cciss: more luns configured" 2172 " on controller than can be handled by" 2173 " this driver.\n"); 2174 } 2175 2176 if (num_luns == 0) 2177 cciss_add_controller_node(h); 2178 2179 /* Compare controller drive array to driver's drive array 2180 * to see if any drives are missing on the controller due 2181 * to action of Array Config Utility (user deletes drive) 2182 * and deregister logical drives which have disappeared. 2183 */ 2184 for (i = 0; i <= h->highest_lun; i++) { 2185 int j; 2186 drv_found = 0; 2187 2188 /* skip holes in the array from already deleted drives */ 2189 if (h->drv[i] == NULL) 2190 continue; 2191 2192 for (j = 0; j < num_luns; j++) { 2193 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid)); 2194 if (memcmp(h->drv[i]->LunID, lunid, 2195 sizeof(lunid)) == 0) { 2196 drv_found = 1; 2197 break; 2198 } 2199 } 2200 if (!drv_found) { 2201 /* Deregister it from the OS, it's gone. */ 2202 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2203 h->drv[i]->busy_configuring = 1; 2204 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2205 return_code = deregister_disk(h, i, 1, via_ioctl); 2206 if (h->drv[i] != NULL) 2207 h->drv[i]->busy_configuring = 0; 2208 } 2209 } 2210 2211 /* Compare controller drive array to driver's drive array. 2212 * Check for updates in the drive information and any new drives 2213 * on the controller due to ACU adding logical drives, or changing 2214 * a logical drive's size, etc. Reregister any new/changed drives 2215 */ 2216 for (i = 0; i < num_luns; i++) { 2217 int j; 2218 2219 drv_found = 0; 2220 2221 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid)); 2222 /* Find if the LUN is already in the drive array 2223 * of the driver. If so then update its info 2224 * if not in use. If it does not exist then find 2225 * the first free index and add it. 2226 */ 2227 for (j = 0; j <= h->highest_lun; j++) { 2228 if (h->drv[j] != NULL && 2229 memcmp(h->drv[j]->LunID, lunid, 2230 sizeof(h->drv[j]->LunID)) == 0) { 2231 drv_index = j; 2232 drv_found = 1; 2233 break; 2234 } 2235 } 2236 2237 /* check if the drive was found already in the array */ 2238 if (!drv_found) { 2239 drv_index = cciss_add_gendisk(h, lunid, 0); 2240 if (drv_index == -1) 2241 goto freeret; 2242 } 2243 cciss_update_drive_info(ctlr, drv_index, first_time, 2244 via_ioctl); 2245 } /* end for */ 2246 2247freeret: 2248 kfree(ld_buff); 2249 h->busy_configuring = 0; 2250 /* We return -1 here to tell the ACU that we have registered/updated 2251 * all of the drives that we can and to keep it from calling us 2252 * additional times. 2253 */ 2254 return -1; 2255mem_msg: 2256 printk(KERN_ERR "cciss: out of memory\n"); 2257 h->busy_configuring = 0; 2258 goto freeret; 2259} 2260 2261static void cciss_clear_drive_info(drive_info_struct *drive_info) 2262{ 2263 /* zero out the disk size info */ 2264 drive_info->nr_blocks = 0; 2265 drive_info->block_size = 0; 2266 drive_info->heads = 0; 2267 drive_info->sectors = 0; 2268 drive_info->cylinders = 0; 2269 drive_info->raid_level = -1; 2270 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no)); 2271 memset(drive_info->model, 0, sizeof(drive_info->model)); 2272 memset(drive_info->rev, 0, sizeof(drive_info->rev)); 2273 memset(drive_info->vendor, 0, sizeof(drive_info->vendor)); 2274 /* 2275 * don't clear the LUNID though, we need to remember which 2276 * one this one is. 2277 */ 2278} 2279 2280/* This function will deregister the disk and it's queue from the 2281 * kernel. It must be called with the controller lock held and the 2282 * drv structures busy_configuring flag set. It's parameters are: 2283 * 2284 * disk = This is the disk to be deregistered 2285 * drv = This is the drive_info_struct associated with the disk to be 2286 * deregistered. It contains information about the disk used 2287 * by the driver. 2288 * clear_all = This flag determines whether or not the disk information 2289 * is going to be completely cleared out and the highest_lun 2290 * reset. Sometimes we want to clear out information about 2291 * the disk in preparation for re-adding it. In this case 2292 * the highest_lun should be left unchanged and the LunID 2293 * should not be cleared. 2294 * via_ioctl 2295 * This indicates whether we've reached this path via ioctl. 2296 * This affects the maximum usage count allowed for c0d0 to be messed with. 2297 * If this path is reached via ioctl(), then the max_usage_count will 2298 * be 1, as the process calling ioctl() has got to have the device open. 2299 * If we get here via sysfs, then the max usage count will be zero. 2300*/ 2301static int deregister_disk(ctlr_info_t *h, int drv_index, 2302 int clear_all, int via_ioctl) 2303{ 2304 int i; 2305 struct gendisk *disk; 2306 drive_info_struct *drv; 2307 int recalculate_highest_lun; 2308 2309 if (!capable(CAP_SYS_RAWIO)) 2310 return -EPERM; 2311 2312 drv = h->drv[drv_index]; 2313 disk = h->gendisk[drv_index]; 2314 2315 /* make sure logical volume is NOT is use */ 2316 if (clear_all || (h->gendisk[0] == disk)) { 2317 if (drv->usage_count > via_ioctl) 2318 return -EBUSY; 2319 } else if (drv->usage_count > 0) 2320 return -EBUSY; 2321 2322 recalculate_highest_lun = (drv == h->drv[h->highest_lun]); 2323 2324 /* invalidate the devices and deregister the disk. If it is disk 2325 * zero do not deregister it but just zero out it's values. This 2326 * allows us to delete disk zero but keep the controller registered. 2327 */ 2328 if (h->gendisk[0] != disk) { 2329 struct request_queue *q = disk->queue; 2330 if (disk->flags & GENHD_FL_UP) { 2331 cciss_destroy_ld_sysfs_entry(h, drv_index, 0); 2332 del_gendisk(disk); 2333 } 2334 if (q) 2335 blk_cleanup_queue(q); 2336 /* If clear_all is set then we are deleting the logical 2337 * drive, not just refreshing its info. For drives 2338 * other than disk 0 we will call put_disk. We do not 2339 * do this for disk 0 as we need it to be able to 2340 * configure the controller. 2341 */ 2342 if (clear_all){ 2343 /* This isn't pretty, but we need to find the 2344 * disk in our array and NULL our the pointer. 2345 * This is so that we will call alloc_disk if 2346 * this index is used again later. 2347 */ 2348 for (i=0; i < CISS_MAX_LUN; i++){ 2349 if (h->gendisk[i] == disk) { 2350 h->gendisk[i] = NULL; 2351 break; 2352 } 2353 } 2354 put_disk(disk); 2355 } 2356 } else { 2357 set_capacity(disk, 0); 2358 cciss_clear_drive_info(drv); 2359 } 2360 2361 --h->num_luns; 2362 2363 /* if it was the last disk, find the new hightest lun */ 2364 if (clear_all && recalculate_highest_lun) { 2365 int i, newhighest = -1; 2366 for (i = 0; i <= h->highest_lun; i++) { 2367 /* if the disk has size > 0, it is available */ 2368 if (h->drv[i] && h->drv[i]->heads) 2369 newhighest = i; 2370 } 2371 h->highest_lun = newhighest; 2372 } 2373 return 0; 2374} 2375 2376static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, 2377 size_t size, __u8 page_code, unsigned char *scsi3addr, 2378 int cmd_type) 2379{ 2380 ctlr_info_t *h = hba[ctlr]; 2381 u64bit buff_dma_handle; 2382 int status = IO_OK; 2383 2384 c->cmd_type = CMD_IOCTL_PEND; 2385 c->Header.ReplyQueue = 0; 2386 if (buff != NULL) { 2387 c->Header.SGList = 1; 2388 c->Header.SGTotal = 1; 2389 } else { 2390 c->Header.SGList = 0; 2391 c->Header.SGTotal = 0; 2392 } 2393 c->Header.Tag.lower = c->busaddr; 2394 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); 2395 2396 c->Request.Type.Type = cmd_type; 2397 if (cmd_type == TYPE_CMD) { 2398 switch (cmd) { 2399 case CISS_INQUIRY: 2400 /* are we trying to read a vital product page */ 2401 if (page_code != 0) { 2402 c->Request.CDB[1] = 0x01; 2403 c->Request.CDB[2] = page_code; 2404 } 2405 c->Request.CDBLen = 6; 2406 c->Request.Type.Attribute = ATTR_SIMPLE; 2407 c->Request.Type.Direction = XFER_READ; 2408 c->Request.Timeout = 0; 2409 c->Request.CDB[0] = CISS_INQUIRY; 2410 c->Request.CDB[4] = size & 0xFF; 2411 break; 2412 case CISS_REPORT_LOG: 2413 case CISS_REPORT_PHYS: 2414 /* Talking to controller so It's a physical command 2415 mode = 00 target = 0. Nothing to write. 2416 */ 2417 c->Request.CDBLen = 12; 2418 c->Request.Type.Attribute = ATTR_SIMPLE; 2419 c->Request.Type.Direction = XFER_READ; 2420 c->Request.Timeout = 0; 2421 c->Request.CDB[0] = cmd; 2422 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB 2423 c->Request.CDB[7] = (size >> 16) & 0xFF; 2424 c->Request.CDB[8] = (size >> 8) & 0xFF; 2425 c->Request.CDB[9] = size & 0xFF; 2426 break; 2427 2428 case CCISS_READ_CAPACITY: 2429 c->Request.CDBLen = 10; 2430 c->Request.Type.Attribute = ATTR_SIMPLE; 2431 c->Request.Type.Direction = XFER_READ; 2432 c->Request.Timeout = 0; 2433 c->Request.CDB[0] = cmd; 2434 break; 2435 case CCISS_READ_CAPACITY_16: 2436 c->Request.CDBLen = 16; 2437 c->Request.Type.Attribute = ATTR_SIMPLE; 2438 c->Request.Type.Direction = XFER_READ; 2439 c->Request.Timeout = 0; 2440 c->Request.CDB[0] = cmd; 2441 c->Request.CDB[1] = 0x10; 2442 c->Request.CDB[10] = (size >> 24) & 0xFF; 2443 c->Request.CDB[11] = (size >> 16) & 0xFF; 2444 c->Request.CDB[12] = (size >> 8) & 0xFF; 2445 c->Request.CDB[13] = size & 0xFF; 2446 c->Request.Timeout = 0; 2447 c->Request.CDB[0] = cmd; 2448 break; 2449 case CCISS_CACHE_FLUSH: 2450 c->Request.CDBLen = 12; 2451 c->Request.Type.Attribute = ATTR_SIMPLE; 2452 c->Request.Type.Direction = XFER_WRITE; 2453 c->Request.Timeout = 0; 2454 c->Request.CDB[0] = BMIC_WRITE; 2455 c->Request.CDB[6] = BMIC_CACHE_FLUSH; 2456 break; 2457 case TEST_UNIT_READY: 2458 c->Request.CDBLen = 6; 2459 c->Request.Type.Attribute = ATTR_SIMPLE; 2460 c->Request.Type.Direction = XFER_NONE; 2461 c->Request.Timeout = 0; 2462 break; 2463 default: 2464 printk(KERN_WARNING 2465 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd); 2466 return IO_ERROR; 2467 } 2468 } else if (cmd_type == TYPE_MSG) { 2469 switch (cmd) { 2470 case 0: /* ABORT message */ 2471 c->Request.CDBLen = 12; 2472 c->Request.Type.Attribute = ATTR_SIMPLE; 2473 c->Request.Type.Direction = XFER_WRITE; 2474 c->Request.Timeout = 0; 2475 c->Request.CDB[0] = cmd; /* abort */ 2476 c->Request.CDB[1] = 0; /* abort a command */ 2477 /* buff contains the tag of the command to abort */ 2478 memcpy(&c->Request.CDB[4], buff, 8); 2479 break; 2480 case 1: /* RESET message */ 2481 c->Request.CDBLen = 16; 2482 c->Request.Type.Attribute = ATTR_SIMPLE; 2483 c->Request.Type.Direction = XFER_NONE; 2484 c->Request.Timeout = 0; 2485 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); 2486 c->Request.CDB[0] = cmd; /* reset */ 2487 c->Request.CDB[1] = 0x03; /* reset a target */ 2488 break; 2489 case 3: /* No-Op message */ 2490 c->Request.CDBLen = 1; 2491 c->Request.Type.Attribute = ATTR_SIMPLE; 2492 c->Request.Type.Direction = XFER_WRITE; 2493 c->Request.Timeout = 0; 2494 c->Request.CDB[0] = cmd; 2495 break; 2496 default: 2497 printk(KERN_WARNING 2498 "cciss%d: unknown message type %d\n", ctlr, cmd); 2499 return IO_ERROR; 2500 } 2501 } else { 2502 printk(KERN_WARNING 2503 "cciss%d: unknown command type %d\n", ctlr, cmd_type); 2504 return IO_ERROR; 2505 } 2506 /* Fill in the scatter gather information */ 2507 if (size > 0) { 2508 buff_dma_handle.val = (__u64) pci_map_single(h->pdev, 2509 buff, size, 2510 PCI_DMA_BIDIRECTIONAL); 2511 c->SG[0].Addr.lower = buff_dma_handle.val32.lower; 2512 c->SG[0].Addr.upper = buff_dma_handle.val32.upper; 2513 c->SG[0].Len = size; 2514 c->SG[0].Ext = 0; /* we are not chaining */ 2515 } 2516 return status; 2517} 2518 2519static int check_target_status(ctlr_info_t *h, CommandList_struct *c) 2520{ 2521 switch (c->err_info->ScsiStatus) { 2522 case SAM_STAT_GOOD: 2523 return IO_OK; 2524 case SAM_STAT_CHECK_CONDITION: 2525 switch (0xf & c->err_info->SenseInfo[2]) { 2526 case 0: return IO_OK; /* no sense */ 2527 case 1: return IO_OK; /* recovered error */ 2528 default: 2529 printk(KERN_WARNING "cciss%d: cmd 0x%02x " 2530 "check condition, sense key = 0x%02x\n", 2531 h->ctlr, c->Request.CDB[0], 2532 c->err_info->SenseInfo[2]); 2533 } 2534 break; 2535 default: 2536 printk(KERN_WARNING "cciss%d: cmd 0x%02x" 2537 "scsi status = 0x%02x\n", h->ctlr, 2538 c->Request.CDB[0], c->err_info->ScsiStatus); 2539 break; 2540 } 2541 return IO_ERROR; 2542} 2543 2544static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c) 2545{ 2546 int return_status = IO_OK; 2547 2548 if (c->err_info->CommandStatus == CMD_SUCCESS) 2549 return IO_OK; 2550 2551 switch (c->err_info->CommandStatus) { 2552 case CMD_TARGET_STATUS: 2553 return_status = check_target_status(h, c); 2554 break; 2555 case CMD_DATA_UNDERRUN: 2556 case CMD_DATA_OVERRUN: 2557 /* expected for inquiry and report lun commands */ 2558 break; 2559 case CMD_INVALID: 2560 printk(KERN_WARNING "cciss: cmd 0x%02x is " 2561 "reported invalid\n", c->Request.CDB[0]); 2562 return_status = IO_ERROR; 2563 break; 2564 case CMD_PROTOCOL_ERR: 2565 printk(KERN_WARNING "cciss: cmd 0x%02x has " 2566 "protocol error \n", c->Request.CDB[0]); 2567 return_status = IO_ERROR; 2568 break; 2569 case CMD_HARDWARE_ERR: 2570 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2571 " hardware error\n", c->Request.CDB[0]); 2572 return_status = IO_ERROR; 2573 break; 2574 case CMD_CONNECTION_LOST: 2575 printk(KERN_WARNING "cciss: cmd 0x%02x had " 2576 "connection lost\n", c->Request.CDB[0]); 2577 return_status = IO_ERROR; 2578 break; 2579 case CMD_ABORTED: 2580 printk(KERN_WARNING "cciss: cmd 0x%02x was " 2581 "aborted\n", c->Request.CDB[0]); 2582 return_status = IO_ERROR; 2583 break; 2584 case CMD_ABORT_FAILED: 2585 printk(KERN_WARNING "cciss: cmd 0x%02x reports " 2586 "abort failed\n", c->Request.CDB[0]); 2587 return_status = IO_ERROR; 2588 break; 2589 case CMD_UNSOLICITED_ABORT: 2590 printk(KERN_WARNING 2591 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr, 2592 c->Request.CDB[0]); 2593 return_status = IO_NEEDS_RETRY; 2594 break; 2595 default: 2596 printk(KERN_WARNING "cciss: cmd 0x%02x returned " 2597 "unknown status %x\n", c->Request.CDB[0], 2598 c->err_info->CommandStatus); 2599 return_status = IO_ERROR; 2600 } 2601 return return_status; 2602} 2603 2604static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 2605 int attempt_retry) 2606{ 2607 DECLARE_COMPLETION_ONSTACK(wait); 2608 u64bit buff_dma_handle; 2609 unsigned long flags; 2610 int return_status = IO_OK; 2611 2612resend_cmd2: 2613 c->waiting = &wait; 2614 /* Put the request on the tail of the queue and send it */ 2615 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 2616 addQ(&h->reqQ, c); 2617 h->Qdepth++; 2618 start_io(h); 2619 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 2620 2621 wait_for_completion(&wait); 2622 2623 if (c->err_info->CommandStatus == 0 || !attempt_retry) 2624 goto command_done; 2625 2626 return_status = process_sendcmd_error(h, c); 2627 2628 if (return_status == IO_NEEDS_RETRY && 2629 c->retry_count < MAX_CMD_RETRIES) { 2630 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr, 2631 c->Request.CDB[0]); 2632 c->retry_count++; 2633 /* erase the old error information */ 2634 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 2635 return_status = IO_OK; 2636 INIT_COMPLETION(wait); 2637 goto resend_cmd2; 2638 } 2639 2640command_done: 2641 /* unlock the buffers from DMA */ 2642 buff_dma_handle.val32.lower = c->SG[0].Addr.lower; 2643 buff_dma_handle.val32.upper = c->SG[0].Addr.upper; 2644 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, 2645 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); 2646 return return_status; 2647} 2648 2649static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, 2650 __u8 page_code, unsigned char scsi3addr[], 2651 int cmd_type) 2652{ 2653 ctlr_info_t *h = hba[ctlr]; 2654 CommandList_struct *c; 2655 int return_status; 2656 2657 c = cmd_alloc(h, 0); 2658 if (!c) 2659 return -ENOMEM; 2660 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code, 2661 scsi3addr, cmd_type); 2662 if (return_status == IO_OK) 2663 return_status = sendcmd_withirq_core(h, c, 1); 2664 2665 cmd_free(h, c, 0); 2666 return return_status; 2667} 2668 2669static void cciss_geometry_inquiry(int ctlr, int logvol, 2670 int withirq, sector_t total_size, 2671 unsigned int block_size, 2672 InquiryData_struct *inq_buff, 2673 drive_info_struct *drv) 2674{ 2675 int return_code; 2676 unsigned long t; 2677 unsigned char scsi3addr[8]; 2678 2679 memset(inq_buff, 0, sizeof(InquiryData_struct)); 2680 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2681 if (withirq) 2682 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, 2683 inq_buff, sizeof(*inq_buff), 2684 0xC1, scsi3addr, TYPE_CMD); 2685 else 2686 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff, 2687 sizeof(*inq_buff), 0xC1, scsi3addr, 2688 TYPE_CMD); 2689 if (return_code == IO_OK) { 2690 if (inq_buff->data_byte[8] == 0xFF) { 2691 printk(KERN_WARNING 2692 "cciss: reading geometry failed, volume " 2693 "does not support reading geometry\n"); 2694 drv->heads = 255; 2695 drv->sectors = 32; // Sectors per track 2696 drv->cylinders = total_size + 1; 2697 drv->raid_level = RAID_UNKNOWN; 2698 } else { 2699 drv->heads = inq_buff->data_byte[6]; 2700 drv->sectors = inq_buff->data_byte[7]; 2701 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8; 2702 drv->cylinders += inq_buff->data_byte[5]; 2703 drv->raid_level = inq_buff->data_byte[8]; 2704 } 2705 drv->block_size = block_size; 2706 drv->nr_blocks = total_size + 1; 2707 t = drv->heads * drv->sectors; 2708 if (t > 1) { 2709 sector_t real_size = total_size + 1; 2710 unsigned long rem = sector_div(real_size, t); 2711 if (rem) 2712 real_size++; 2713 drv->cylinders = real_size; 2714 } 2715 } else { /* Get geometry failed */ 2716 printk(KERN_WARNING "cciss: reading geometry failed\n"); 2717 } 2718} 2719 2720static void 2721cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size, 2722 unsigned int *block_size) 2723{ 2724 ReadCapdata_struct *buf; 2725 int return_code; 2726 unsigned char scsi3addr[8]; 2727 2728 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL); 2729 if (!buf) { 2730 printk(KERN_WARNING "cciss: out of memory\n"); 2731 return; 2732 } 2733 2734 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2735 if (withirq) 2736 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, 2737 ctlr, buf, sizeof(ReadCapdata_struct), 2738 0, scsi3addr, TYPE_CMD); 2739 else 2740 return_code = sendcmd(CCISS_READ_CAPACITY, 2741 ctlr, buf, sizeof(ReadCapdata_struct), 2742 0, scsi3addr, TYPE_CMD); 2743 if (return_code == IO_OK) { 2744 *total_size = be32_to_cpu(*(__be32 *) buf->total_size); 2745 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2746 } else { /* read capacity command failed */ 2747 printk(KERN_WARNING "cciss: read capacity failed\n"); 2748 *total_size = 0; 2749 *block_size = BLOCK_SIZE; 2750 } 2751 kfree(buf); 2752} 2753 2754static void 2755cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size) 2756{ 2757 ReadCapdata_struct_16 *buf; 2758 int return_code; 2759 unsigned char scsi3addr[8]; 2760 2761 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL); 2762 if (!buf) { 2763 printk(KERN_WARNING "cciss: out of memory\n"); 2764 return; 2765 } 2766 2767 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); 2768 if (withirq) { 2769 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16, 2770 ctlr, buf, sizeof(ReadCapdata_struct_16), 2771 0, scsi3addr, TYPE_CMD); 2772 } 2773 else { 2774 return_code = sendcmd(CCISS_READ_CAPACITY_16, 2775 ctlr, buf, sizeof(ReadCapdata_struct_16), 2776 0, scsi3addr, TYPE_CMD); 2777 } 2778 if (return_code == IO_OK) { 2779 *total_size = be64_to_cpu(*(__be64 *) buf->total_size); 2780 *block_size = be32_to_cpu(*(__be32 *) buf->block_size); 2781 } else { /* read capacity command failed */ 2782 printk(KERN_WARNING "cciss: read capacity failed\n"); 2783 *total_size = 0; 2784 *block_size = BLOCK_SIZE; 2785 } 2786 printk(KERN_INFO " blocks= %llu block_size= %d\n", 2787 (unsigned long long)*total_size+1, *block_size); 2788 kfree(buf); 2789} 2790 2791static int cciss_revalidate(struct gendisk *disk) 2792{ 2793 ctlr_info_t *h = get_host(disk); 2794 drive_info_struct *drv = get_drv(disk); 2795 int logvol; 2796 int FOUND = 0; 2797 unsigned int block_size; 2798 sector_t total_size; 2799 InquiryData_struct *inq_buff = NULL; 2800 2801 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { 2802 if (memcmp(h->drv[logvol]->LunID, drv->LunID, 2803 sizeof(drv->LunID)) == 0) { 2804 FOUND = 1; 2805 break; 2806 } 2807 } 2808 2809 if (!FOUND) 2810 return 1; 2811 2812 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); 2813 if (inq_buff == NULL) { 2814 printk(KERN_WARNING "cciss: out of memory\n"); 2815 return 1; 2816 } 2817 if (h->cciss_read == CCISS_READ_10) { 2818 cciss_read_capacity(h->ctlr, logvol, 1, 2819 &total_size, &block_size); 2820 } else { 2821 cciss_read_capacity_16(h->ctlr, logvol, 1, 2822 &total_size, &block_size); 2823 } 2824 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size, 2825 inq_buff, drv); 2826 2827 blk_queue_logical_block_size(drv->queue, drv->block_size); 2828 set_capacity(disk, drv->nr_blocks); 2829 2830 kfree(inq_buff); 2831 return 0; 2832} 2833 2834/* 2835 * Wait polling for a command to complete. 2836 * The memory mapped FIFO is polled for the completion. 2837 * Used only at init time, interrupts from the HBA are disabled. 2838 */ 2839static unsigned long pollcomplete(int ctlr) 2840{ 2841 unsigned long done; 2842 int i; 2843 2844 /* Wait (up to 20 seconds) for a command to complete */ 2845 2846 for (i = 20 * HZ; i > 0; i--) { 2847 done = hba[ctlr]->access.command_completed(hba[ctlr]); 2848 if (done == FIFO_EMPTY) 2849 schedule_timeout_uninterruptible(1); 2850 else 2851 return done; 2852 } 2853 /* Invalid address to tell caller we ran out of time */ 2854 return 1; 2855} 2856 2857/* Send command c to controller h and poll for it to complete. 2858 * Turns interrupts off on the board. Used at driver init time 2859 * and during SCSI error recovery. 2860 */ 2861static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c) 2862{ 2863 int i; 2864 unsigned long complete; 2865 int status = IO_ERROR; 2866 u64bit buff_dma_handle; 2867 2868resend_cmd1: 2869 2870 /* Disable interrupt on the board. */ 2871 h->access.set_intr_mask(h, CCISS_INTR_OFF); 2872 2873 /* Make sure there is room in the command FIFO */ 2874 /* Actually it should be completely empty at this time */ 2875 /* unless we are in here doing error handling for the scsi */ 2876 /* tape side of the driver. */ 2877 for (i = 200000; i > 0; i--) { 2878 /* if fifo isn't full go */ 2879 if (!(h->access.fifo_full(h))) 2880 break; 2881 udelay(10); 2882 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full," 2883 " waiting!\n", h->ctlr); 2884 } 2885 h->access.submit_command(h, c); /* Send the cmd */ 2886 do { 2887 complete = pollcomplete(h->ctlr); 2888 2889#ifdef CCISS_DEBUG 2890 printk(KERN_DEBUG "cciss: command completed\n"); 2891#endif /* CCISS_DEBUG */ 2892 2893 if (complete == 1) { 2894 printk(KERN_WARNING 2895 "cciss cciss%d: SendCmd Timeout out, " 2896 "No command list address returned!\n", h->ctlr); 2897 status = IO_ERROR; 2898 break; 2899 } 2900 2901 /* Make sure it's the command we're expecting. */ 2902 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) { 2903 printk(KERN_WARNING "cciss%d: Unexpected command " 2904 "completion.\n", h->ctlr); 2905 continue; 2906 } 2907 2908 /* It is our command. If no error, we're done. */ 2909 if (!(complete & CISS_ERROR_BIT)) { 2910 status = IO_OK; 2911 break; 2912 } 2913 2914 /* There is an error... */ 2915 2916 /* if data overrun or underun on Report command ignore it */ 2917 if (((c->Request.CDB[0] == CISS_REPORT_LOG) || 2918 (c->Request.CDB[0] == CISS_REPORT_PHYS) || 2919 (c->Request.CDB[0] == CISS_INQUIRY)) && 2920 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) || 2921 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) { 2922 complete = c->busaddr; 2923 status = IO_OK; 2924 break; 2925 } 2926 2927 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) { 2928 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n", 2929 h->ctlr, c); 2930 if (c->retry_count < MAX_CMD_RETRIES) { 2931 printk(KERN_WARNING "cciss%d: retrying %p\n", 2932 h->ctlr, c); 2933 c->retry_count++; 2934 /* erase the old error information */ 2935 memset(c->err_info, 0, sizeof(c->err_info)); 2936 goto resend_cmd1; 2937 } 2938 printk(KERN_WARNING "cciss%d: retried %p too many " 2939 "times\n", h->ctlr, c); 2940 status = IO_ERROR; 2941 break; 2942 } 2943 2944 if (c->err_info->CommandStatus == CMD_UNABORTABLE) { 2945 printk(KERN_WARNING "cciss%d: command could not be " 2946 "aborted.\n", h->ctlr); 2947 status = IO_ERROR; 2948 break; 2949 } 2950 2951 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) { 2952 status = check_target_status(h, c); 2953 break; 2954 } 2955 2956 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr); 2957 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n", 2958 c->Request.CDB[0], c->err_info->CommandStatus); 2959 status = IO_ERROR; 2960 break; 2961 2962 } while (1); 2963 2964 /* unlock the data buffer from DMA */ 2965 buff_dma_handle.val32.lower = c->SG[0].Addr.lower; 2966 buff_dma_handle.val32.upper = c->SG[0].Addr.upper; 2967 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, 2968 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); 2969 return status; 2970} 2971 2972/* 2973 * Send a command to the controller, and wait for it to complete. 2974 * Used at init time, and during SCSI error recovery. 2975 */ 2976static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, 2977 __u8 page_code, unsigned char *scsi3addr, int cmd_type) 2978{ 2979 CommandList_struct *c; 2980 int status; 2981 2982 c = cmd_alloc(hba[ctlr], 1); 2983 if (!c) { 2984 printk(KERN_WARNING "cciss: unable to get memory"); 2985 return IO_ERROR; 2986 } 2987 status = fill_cmd(c, cmd, ctlr, buff, size, page_code, 2988 scsi3addr, cmd_type); 2989 if (status == IO_OK) 2990 status = sendcmd_core(hba[ctlr], c); 2991 cmd_free(hba[ctlr], c, 1); 2992 return status; 2993} 2994 2995/* 2996 * Map (physical) PCI mem into (virtual) kernel space 2997 */ 2998static void __iomem *remap_pci_mem(ulong base, ulong size) 2999{ 3000 ulong page_base = ((ulong) base) & PAGE_MASK; 3001 ulong page_offs = ((ulong) base) - page_base; 3002 void __iomem *page_remapped = ioremap(page_base, page_offs + size); 3003 3004 return page_remapped ? (page_remapped + page_offs) : NULL; 3005} 3006 3007/* 3008 * Takes jobs of the Q and sends them to the hardware, then puts it on 3009 * the Q to wait for completion. 3010 */ 3011static void start_io(ctlr_info_t *h) 3012{ 3013 CommandList_struct *c; 3014 3015 while (!hlist_empty(&h->reqQ)) { 3016 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 3017 /* can't do anything if fifo is full */ 3018 if ((h->access.fifo_full(h))) { 3019 printk(KERN_WARNING "cciss: fifo full\n"); 3020 break; 3021 } 3022 3023 /* Get the first entry from the Request Q */ 3024 removeQ(c); 3025 h->Qdepth--; 3026 3027 /* Tell the controller execute command */ 3028 h->access.submit_command(h, c); 3029 3030 /* Put job onto the completed Q */ 3031 addQ(&h->cmpQ, c); 3032 } 3033} 3034 3035/* Assumes that CCISS_LOCK(h->ctlr) is held. */ 3036/* Zeros out the error record and then resends the command back */ 3037/* to the controller */ 3038static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c) 3039{ 3040 /* erase the old error information */ 3041 memset(c->err_info, 0, sizeof(ErrorInfo_struct)); 3042 3043 /* add it to software queue and then send it to the controller */ 3044 addQ(&h->reqQ, c); 3045 h->Qdepth++; 3046 if (h->Qdepth > h->maxQsinceinit) 3047 h->maxQsinceinit = h->Qdepth; 3048 3049 start_io(h); 3050} 3051 3052static inline unsigned int make_status_bytes(unsigned int scsi_status_byte, 3053 unsigned int msg_byte, unsigned int host_byte, 3054 unsigned int driver_byte) 3055{ 3056 /* inverse of macros in scsi.h */ 3057 return (scsi_status_byte & 0xff) | 3058 ((msg_byte & 0xff) << 8) | 3059 ((host_byte & 0xff) << 16) | 3060 ((driver_byte & 0xff) << 24); 3061} 3062 3063static inline int evaluate_target_status(ctlr_info_t *h, 3064 CommandList_struct *cmd, int *retry_cmd) 3065{ 3066 unsigned char sense_key; 3067 unsigned char status_byte, msg_byte, host_byte, driver_byte; 3068 int error_value; 3069 3070 *retry_cmd = 0; 3071 /* If we get in here, it means we got "target status", that is, scsi status */ 3072 status_byte = cmd->err_info->ScsiStatus; 3073 driver_byte = DRIVER_OK; 3074 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */ 3075 3076 if (blk_pc_request(cmd->rq)) 3077 host_byte = DID_PASSTHROUGH; 3078 else 3079 host_byte = DID_OK; 3080 3081 error_value = make_status_bytes(status_byte, msg_byte, 3082 host_byte, driver_byte); 3083 3084 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) { 3085 if (!blk_pc_request(cmd->rq)) 3086 printk(KERN_WARNING "cciss: cmd %p " 3087 "has SCSI Status 0x%x\n", 3088 cmd, cmd->err_info->ScsiStatus); 3089 return error_value; 3090 } 3091 3092 /* check the sense key */ 3093 sense_key = 0xf & cmd->err_info->SenseInfo[2]; 3094 /* no status or recovered error */ 3095 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq)) 3096 error_value = 0; 3097 3098 if (check_for_unit_attention(h, cmd)) { 3099 *retry_cmd = !blk_pc_request(cmd->rq); 3100 return 0; 3101 } 3102 3103 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */ 3104 if (error_value != 0) 3105 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION" 3106 " sense key = 0x%x\n", cmd, sense_key); 3107 return error_value; 3108 } 3109 3110 /* SG_IO or similar, copy sense data back */ 3111 if (cmd->rq->sense) { 3112 if (cmd->rq->sense_len > cmd->err_info->SenseLen) 3113 cmd->rq->sense_len = cmd->err_info->SenseLen; 3114 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo, 3115 cmd->rq->sense_len); 3116 } else 3117 cmd->rq->sense_len = 0; 3118 3119 return error_value; 3120} 3121 3122/* checks the status of the job and calls complete buffers to mark all 3123 * buffers for the completed job. Note that this function does not need 3124 * to hold the hba/queue lock. 3125 */ 3126static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd, 3127 int timeout) 3128{ 3129 int retry_cmd = 0; 3130 struct request *rq = cmd->rq; 3131 3132 rq->errors = 0; 3133 3134 if (timeout) 3135 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT); 3136 3137 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */ 3138 goto after_error_processing; 3139 3140 switch (cmd->err_info->CommandStatus) { 3141 case CMD_TARGET_STATUS: 3142 rq->errors = evaluate_target_status(h, cmd, &retry_cmd); 3143 break; 3144 case CMD_DATA_UNDERRUN: 3145 if (blk_fs_request(cmd->rq)) { 3146 printk(KERN_WARNING "cciss: cmd %p has" 3147 " completed with data underrun " 3148 "reported\n", cmd); 3149 cmd->rq->resid_len = cmd->err_info->ResidualCnt; 3150 } 3151 break; 3152 case CMD_DATA_OVERRUN: 3153 if (blk_fs_request(cmd->rq)) 3154 printk(KERN_WARNING "cciss: cmd %p has" 3155 " completed with data overrun " 3156 "reported\n", cmd); 3157 break; 3158 case CMD_INVALID: 3159 printk(KERN_WARNING "cciss: cmd %p is " 3160 "reported invalid\n", cmd); 3161 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3162 cmd->err_info->CommandStatus, DRIVER_OK, 3163 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3164 break; 3165 case CMD_PROTOCOL_ERR: 3166 printk(KERN_WARNING "cciss: cmd %p has " 3167 "protocol error \n", cmd); 3168 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3169 cmd->err_info->CommandStatus, DRIVER_OK, 3170 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3171 break; 3172 case CMD_HARDWARE_ERR: 3173 printk(KERN_WARNING "cciss: cmd %p had " 3174 " hardware error\n", cmd); 3175 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3176 cmd->err_info->CommandStatus, DRIVER_OK, 3177 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3178 break; 3179 case CMD_CONNECTION_LOST: 3180 printk(KERN_WARNING "cciss: cmd %p had " 3181 "connection lost\n", cmd); 3182 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3183 cmd->err_info->CommandStatus, DRIVER_OK, 3184 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3185 break; 3186 case CMD_ABORTED: 3187 printk(KERN_WARNING "cciss: cmd %p was " 3188 "aborted\n", cmd); 3189 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3190 cmd->err_info->CommandStatus, DRIVER_OK, 3191 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); 3192 break; 3193 case CMD_ABORT_FAILED: 3194 printk(KERN_WARNING "cciss: cmd %p reports " 3195 "abort failed\n", cmd); 3196 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3197 cmd->err_info->CommandStatus, DRIVER_OK, 3198 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3199 break; 3200 case CMD_UNSOLICITED_ABORT: 3201 printk(KERN_WARNING "cciss%d: unsolicited " 3202 "abort %p\n", h->ctlr, cmd); 3203 if (cmd->retry_count < MAX_CMD_RETRIES) { 3204 retry_cmd = 1; 3205 printk(KERN_WARNING 3206 "cciss%d: retrying %p\n", h->ctlr, cmd); 3207 cmd->retry_count++; 3208 } else 3209 printk(KERN_WARNING 3210 "cciss%d: %p retried too " 3211 "many times\n", h->ctlr, cmd); 3212 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3213 cmd->err_info->CommandStatus, DRIVER_OK, 3214 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); 3215 break; 3216 case CMD_TIMEOUT: 3217 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd); 3218 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3219 cmd->err_info->CommandStatus, DRIVER_OK, 3220 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3221 break; 3222 default: 3223 printk(KERN_WARNING "cciss: cmd %p returned " 3224 "unknown status %x\n", cmd, 3225 cmd->err_info->CommandStatus); 3226 rq->errors = make_status_bytes(SAM_STAT_GOOD, 3227 cmd->err_info->CommandStatus, DRIVER_OK, 3228 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); 3229 } 3230 3231after_error_processing: 3232 3233 /* We need to return this command */ 3234 if (retry_cmd) { 3235 resend_cciss_cmd(h, cmd); 3236 return; 3237 } 3238 cmd->rq->completion_data = cmd; 3239 blk_complete_request(cmd->rq); 3240} 3241 3242/* 3243 * Get a request and submit it to the controller. 3244 */ 3245static void do_cciss_request(struct request_queue *q) 3246{ 3247 ctlr_info_t *h = q->queuedata; 3248 CommandList_struct *c; 3249 sector_t start_blk; 3250 int seg; 3251 struct request *creq; 3252 u64bit temp64; 3253 struct scatterlist tmp_sg[MAXSGENTRIES]; 3254 drive_info_struct *drv; 3255 int i, dir; 3256 3257 /* We call start_io here in case there is a command waiting on the 3258 * queue that has not been sent. 3259 */ 3260 if (blk_queue_plugged(q)) 3261 goto startio; 3262 3263 queue: 3264 creq = blk_peek_request(q); 3265 if (!creq) 3266 goto startio; 3267 3268 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES); 3269 3270 if ((c = cmd_alloc(h, 1)) == NULL) 3271 goto full; 3272 3273 blk_start_request(creq); 3274 3275 spin_unlock_irq(q->queue_lock); 3276 3277 c->cmd_type = CMD_RWREQ; 3278 c->rq = creq; 3279 3280 /* fill in the request */ 3281 drv = creq->rq_disk->private_data; 3282 c->Header.ReplyQueue = 0; // unused in simple mode 3283 /* got command from pool, so use the command block index instead */ 3284 /* for direct lookups. */ 3285 /* The first 2 bits are reserved for controller error reporting. */ 3286 c->Header.Tag.lower = (c->cmdindex << 3); 3287 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */ 3288 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID)); 3289 c->Request.CDBLen = 10; // 12 byte commands not in FW yet; 3290 c->Request.Type.Type = TYPE_CMD; // It is a command. 3291 c->Request.Type.Attribute = ATTR_SIMPLE; 3292 c->Request.Type.Direction = 3293 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE; 3294 c->Request.Timeout = 0; // Don't time out 3295 c->Request.CDB[0] = 3296 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write; 3297 start_blk = blk_rq_pos(creq); 3298#ifdef CCISS_DEBUG 3299 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", 3300 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq)); 3301#endif /* CCISS_DEBUG */ 3302 3303 sg_init_table(tmp_sg, MAXSGENTRIES); 3304 seg = blk_rq_map_sg(q, creq, tmp_sg); 3305 3306 /* get the DMA records for the setup */ 3307 if (c->Request.Type.Direction == XFER_READ) 3308 dir = PCI_DMA_FROMDEVICE; 3309 else 3310 dir = PCI_DMA_TODEVICE; 3311 3312 for (i = 0; i < seg; i++) { 3313 c->SG[i].Len = tmp_sg[i].length; 3314 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]), 3315 tmp_sg[i].offset, 3316 tmp_sg[i].length, dir); 3317 c->SG[i].Addr.lower = temp64.val32.lower; 3318 c->SG[i].Addr.upper = temp64.val32.upper; 3319 c->SG[i].Ext = 0; // we are not chaining 3320 } 3321 /* track how many SG entries we are using */ 3322 if (seg > h->maxSG) 3323 h->maxSG = seg; 3324 3325#ifdef CCISS_DEBUG 3326 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n", 3327 blk_rq_sectors(creq), seg); 3328#endif /* CCISS_DEBUG */ 3329 3330 c->Header.SGList = c->Header.SGTotal = seg; 3331 if (likely(blk_fs_request(creq))) { 3332 if(h->cciss_read == CCISS_READ_10) { 3333 c->Request.CDB[1] = 0; 3334 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB 3335 c->Request.CDB[3] = (start_blk >> 16) & 0xff; 3336 c->Request.CDB[4] = (start_blk >> 8) & 0xff; 3337 c->Request.CDB[5] = start_blk & 0xff; 3338 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB 3339 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff; 3340 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff; 3341 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0; 3342 } else { 3343 u32 upper32 = upper_32_bits(start_blk); 3344 3345 c->Request.CDBLen = 16; 3346 c->Request.CDB[1]= 0; 3347 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB 3348 c->Request.CDB[3]= (upper32 >> 16) & 0xff; 3349 c->Request.CDB[4]= (upper32 >> 8) & 0xff; 3350 c->Request.CDB[5]= upper32 & 0xff; 3351 c->Request.CDB[6]= (start_blk >> 24) & 0xff; 3352 c->Request.CDB[7]= (start_blk >> 16) & 0xff; 3353 c->Request.CDB[8]= (start_blk >> 8) & 0xff; 3354 c->Request.CDB[9]= start_blk & 0xff; 3355 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff; 3356 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff; 3357 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff; 3358 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff; 3359 c->Request.CDB[14] = c->Request.CDB[15] = 0; 3360 } 3361 } else if (blk_pc_request(creq)) { 3362 c->Request.CDBLen = creq->cmd_len; 3363 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB); 3364 } else { 3365 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type); 3366 BUG(); 3367 } 3368 3369 spin_lock_irq(q->queue_lock); 3370 3371 addQ(&h->reqQ, c); 3372 h->Qdepth++; 3373 if (h->Qdepth > h->maxQsinceinit) 3374 h->maxQsinceinit = h->Qdepth; 3375 3376 goto queue; 3377full: 3378 blk_stop_queue(q); 3379startio: 3380 /* We will already have the driver lock here so not need 3381 * to lock it. 3382 */ 3383 start_io(h); 3384} 3385 3386static inline unsigned long get_next_completion(ctlr_info_t *h) 3387{ 3388 return h->access.command_completed(h); 3389} 3390 3391static inline int interrupt_pending(ctlr_info_t *h) 3392{ 3393 return h->access.intr_pending(h); 3394} 3395 3396static inline long interrupt_not_for_us(ctlr_info_t *h) 3397{ 3398 return (((h->access.intr_pending(h) == 0) || 3399 (h->interrupts_enabled == 0))); 3400} 3401 3402static irqreturn_t do_cciss_intr(int irq, void *dev_id) 3403{ 3404 ctlr_info_t *h = dev_id; 3405 CommandList_struct *c; 3406 unsigned long flags; 3407 __u32 a, a1, a2; 3408 3409 if (interrupt_not_for_us(h)) 3410 return IRQ_NONE; 3411 /* 3412 * If there are completed commands in the completion queue, 3413 * we had better do something about it. 3414 */ 3415 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); 3416 while (interrupt_pending(h)) { 3417 while ((a = get_next_completion(h)) != FIFO_EMPTY) { 3418 a1 = a; 3419 if ((a & 0x04)) { 3420 a2 = (a >> 3); 3421 if (a2 >= h->nr_cmds) { 3422 printk(KERN_WARNING 3423 "cciss: controller cciss%d failed, stopping.\n", 3424 h->ctlr); 3425 fail_all_cmds(h->ctlr); 3426 return IRQ_HANDLED; 3427 } 3428 3429 c = h->cmd_pool + a2; 3430 a = c->busaddr; 3431 3432 } else { 3433 struct hlist_node *tmp; 3434 3435 a &= ~3; 3436 c = NULL; 3437 hlist_for_each_entry(c, tmp, &h->cmpQ, list) { 3438 if (c->busaddr == a) 3439 break; 3440 } 3441 } 3442 /* 3443 * If we've found the command, take it off the 3444 * completion Q and free it 3445 */ 3446 if (c && c->busaddr == a) { 3447 removeQ(c); 3448 if (c->cmd_type == CMD_RWREQ) { 3449 complete_command(h, c, 0); 3450 } else if (c->cmd_type == CMD_IOCTL_PEND) { 3451 complete(c->waiting); 3452 } 3453# ifdef CONFIG_CISS_SCSI_TAPE 3454 else if (c->cmd_type == CMD_SCSI) 3455 complete_scsi_command(c, 0, a1); 3456# endif 3457 continue; 3458 } 3459 } 3460 } 3461 3462 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); 3463 return IRQ_HANDLED; 3464} 3465 3466/** 3467 * add_to_scan_list() - add controller to rescan queue 3468 * @h: Pointer to the controller. 3469 * 3470 * Adds the controller to the rescan queue if not already on the queue. 3471 * 3472 * returns 1 if added to the queue, 0 if skipped (could be on the 3473 * queue already, or the controller could be initializing or shutting 3474 * down). 3475 **/ 3476static int add_to_scan_list(struct ctlr_info *h) 3477{ 3478 struct ctlr_info *test_h; 3479 int found = 0; 3480 int ret = 0; 3481 3482 if (h->busy_initializing) 3483 return 0; 3484 3485 if (!mutex_trylock(&h->busy_shutting_down)) 3486 return 0; 3487 3488 mutex_lock(&scan_mutex); 3489 list_for_each_entry(test_h, &scan_q, scan_list) { 3490 if (test_h == h) { 3491 found = 1; 3492 break; 3493 } 3494 } 3495 if (!found && !h->busy_scanning) { 3496 INIT_COMPLETION(h->scan_wait); 3497 list_add_tail(&h->scan_list, &scan_q); 3498 ret = 1; 3499 } 3500 mutex_unlock(&scan_mutex); 3501 mutex_unlock(&h->busy_shutting_down); 3502 3503 return ret; 3504} 3505 3506/** 3507 * remove_from_scan_list() - remove controller from rescan queue 3508 * @h: Pointer to the controller. 3509 * 3510 * Removes the controller from the rescan queue if present. Blocks if 3511 * the controller is currently conducting a rescan. 3512 **/ 3513static void remove_from_scan_list(struct ctlr_info *h) 3514{ 3515 struct ctlr_info *test_h, *tmp_h; 3516 int scanning = 0; 3517 3518 mutex_lock(&scan_mutex); 3519 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) { 3520 if (test_h == h) { 3521 list_del(&h->scan_list); 3522 complete_all(&h->scan_wait); 3523 mutex_unlock(&scan_mutex); 3524 return; 3525 } 3526 } 3527 if (&h->busy_scanning) 3528 scanning = 0; 3529 mutex_unlock(&scan_mutex); 3530 3531 if (scanning) 3532 wait_for_completion(&h->scan_wait); 3533} 3534 3535/** 3536 * scan_thread() - kernel thread used to rescan controllers 3537 * @data: Ignored. 3538 * 3539 * A kernel thread used scan for drive topology changes on 3540 * controllers. The thread processes only one controller at a time 3541 * using a queue. Controllers are added to the queue using 3542 * add_to_scan_list() and removed from the queue either after done 3543 * processing or using remove_from_scan_list(). 3544 * 3545 * returns 0. 3546 **/ 3547static int scan_thread(void *data) 3548{ 3549 struct ctlr_info *h; 3550 3551 while (1) { 3552 set_current_state(TASK_INTERRUPTIBLE); 3553 schedule(); 3554 if (kthread_should_stop()) 3555 break; 3556 3557 while (1) { 3558 mutex_lock(&scan_mutex); 3559 if (list_empty(&scan_q)) { 3560 mutex_unlock(&scan_mutex); 3561 break; 3562 } 3563 3564 h = list_entry(scan_q.next, 3565 struct ctlr_info, 3566 scan_list); 3567 list_del(&h->scan_list); 3568 h->busy_scanning = 1; 3569 mutex_unlock(&scan_mutex); 3570 3571 if (h) { 3572 rebuild_lun_table(h, 0, 0); 3573 complete_all(&h->scan_wait); 3574 mutex_lock(&scan_mutex); 3575 h->busy_scanning = 0; 3576 mutex_unlock(&scan_mutex); 3577 } 3578 } 3579 } 3580 3581 return 0; 3582} 3583 3584static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c) 3585{ 3586 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) 3587 return 0; 3588 3589 switch (c->err_info->SenseInfo[12]) { 3590 case STATE_CHANGED: 3591 printk(KERN_WARNING "cciss%d: a state change " 3592 "detected, command retried\n", h->ctlr); 3593 return 1; 3594 break; 3595 case LUN_FAILED: 3596 printk(KERN_WARNING "cciss%d: LUN failure " 3597 "detected, action required\n", h->ctlr); 3598 return 1; 3599 break; 3600 case REPORT_LUNS_CHANGED: 3601 printk(KERN_WARNING "cciss%d: report LUN data " 3602 "changed\n", h->ctlr); 3603 add_to_scan_list(h); 3604 wake_up_process(cciss_scan_thread); 3605 return 1; 3606 break; 3607 case POWER_OR_RESET: 3608 printk(KERN_WARNING "cciss%d: a power on " 3609 "or device reset detected\n", h->ctlr); 3610 return 1; 3611 break; 3612 case UNIT_ATTENTION_CLEARED: 3613 printk(KERN_WARNING "cciss%d: unit attention " 3614 "cleared by another initiator\n", h->ctlr); 3615 return 1; 3616 break; 3617 default: 3618 printk(KERN_WARNING "cciss%d: unknown " 3619 "unit attention detected\n", h->ctlr); 3620 return 1; 3621 } 3622} 3623 3624/* 3625 * We cannot read the structure directly, for portability we must use 3626 * the io functions. 3627 * This is for debug only. 3628 */ 3629#ifdef CCISS_DEBUG 3630static void print_cfg_table(CfgTable_struct *tb) 3631{ 3632 int i; 3633 char temp_name[17]; 3634 3635 printk("Controller Configuration information\n"); 3636 printk("------------------------------------\n"); 3637 for (i = 0; i < 4; i++) 3638 temp_name[i] = readb(&(tb->Signature[i])); 3639 temp_name[4] = '\0'; 3640 printk(" Signature = %s\n", temp_name); 3641 printk(" Spec Number = %d\n", readl(&(tb->SpecValence))); 3642 printk(" Transport methods supported = 0x%x\n", 3643 readl(&(tb->TransportSupport))); 3644 printk(" Transport methods active = 0x%x\n", 3645 readl(&(tb->TransportActive))); 3646 printk(" Requested transport Method = 0x%x\n", 3647 readl(&(tb->HostWrite.TransportRequest))); 3648 printk(" Coalesce Interrupt Delay = 0x%x\n", 3649 readl(&(tb->HostWrite.CoalIntDelay))); 3650 printk(" Coalesce Interrupt Count = 0x%x\n", 3651 readl(&(tb->HostWrite.CoalIntCount))); 3652 printk(" Max outstanding commands = 0x%d\n", 3653 readl(&(tb->CmdsOutMax))); 3654 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes))); 3655 for (i = 0; i < 16; i++) 3656 temp_name[i] = readb(&(tb->ServerName[i])); 3657 temp_name[16] = '\0'; 3658 printk(" Server Name = %s\n", temp_name); 3659 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat))); 3660} 3661#endif /* CCISS_DEBUG */ 3662 3663static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) 3664{ 3665 int i, offset, mem_type, bar_type; 3666 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ 3667 return 0; 3668 offset = 0; 3669 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3670 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; 3671 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) 3672 offset += 4; 3673 else { 3674 mem_type = pci_resource_flags(pdev, i) & 3675 PCI_BASE_ADDRESS_MEM_TYPE_MASK; 3676 switch (mem_type) { 3677 case PCI_BASE_ADDRESS_MEM_TYPE_32: 3678 case PCI_BASE_ADDRESS_MEM_TYPE_1M: 3679 offset += 4; /* 32 bit */ 3680 break; 3681 case PCI_BASE_ADDRESS_MEM_TYPE_64: 3682 offset += 8; 3683 break; 3684 default: /* reserved in PCI 2.2 */ 3685 printk(KERN_WARNING 3686 "Base address is invalid\n"); 3687 return -1; 3688 break; 3689 } 3690 } 3691 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) 3692 return i + 1; 3693 } 3694 return -1; 3695} 3696 3697/* If MSI/MSI-X is supported by the kernel we will try to enable it on 3698 * controllers that are capable. If not, we use IO-APIC mode. 3699 */ 3700 3701static void __devinit cciss_interrupt_mode(ctlr_info_t *c, 3702 struct pci_dev *pdev, __u32 board_id) 3703{ 3704#ifdef CONFIG_PCI_MSI 3705 int err; 3706 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1}, 3707 {0, 2}, {0, 3} 3708 }; 3709 3710 /* Some boards advertise MSI but don't really support it */ 3711 if ((board_id == 0x40700E11) || 3712 (board_id == 0x40800E11) || 3713 (board_id == 0x40820E11) || (board_id == 0x40830E11)) 3714 goto default_int_mode; 3715 3716 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) { 3717 err = pci_enable_msix(pdev, cciss_msix_entries, 4); 3718 if (!err) { 3719 c->intr[0] = cciss_msix_entries[0].vector; 3720 c->intr[1] = cciss_msix_entries[1].vector; 3721 c->intr[2] = cciss_msix_entries[2].vector; 3722 c->intr[3] = cciss_msix_entries[3].vector; 3723 c->msix_vector = 1; 3724 return; 3725 } 3726 if (err > 0) { 3727 printk(KERN_WARNING "cciss: only %d MSI-X vectors " 3728 "available\n", err); 3729 goto default_int_mode; 3730 } else { 3731 printk(KERN_WARNING "cciss: MSI-X init failed %d\n", 3732 err); 3733 goto default_int_mode; 3734 } 3735 } 3736 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) { 3737 if (!pci_enable_msi(pdev)) { 3738 c->msi_vector = 1; 3739 } else { 3740 printk(KERN_WARNING "cciss: MSI init failed\n"); 3741 } 3742 } 3743default_int_mode: 3744#endif /* CONFIG_PCI_MSI */ 3745 /* if we get here we're going to use the default interrupt mode */ 3746 c->intr[SIMPLE_MODE_INT] = pdev->irq; 3747 return; 3748} 3749 3750static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev) 3751{ 3752 ushort subsystem_vendor_id, subsystem_device_id, command; 3753 __u32 board_id, scratchpad = 0; 3754 __u64 cfg_offset; 3755 __u32 cfg_base_addr; 3756 __u64 cfg_base_addr_index; 3757 int i, err; 3758 3759 /* check to see if controller has been disabled */ 3760 /* BEFORE trying to enable it */ 3761 (void)pci_read_config_word(pdev, PCI_COMMAND, &command); 3762 if (!(command & 0x02)) { 3763 printk(KERN_WARNING 3764 "cciss: controller appears to be disabled\n"); 3765 return -ENODEV; 3766 } 3767 3768 err = pci_enable_device(pdev); 3769 if (err) { 3770 printk(KERN_ERR "cciss: Unable to Enable PCI device\n"); 3771 return err; 3772 } 3773 3774 err = pci_request_regions(pdev, "cciss"); 3775 if (err) { 3776 printk(KERN_ERR "cciss: Cannot obtain PCI resources, " 3777 "aborting\n"); 3778 return err; 3779 } 3780 3781 subsystem_vendor_id = pdev->subsystem_vendor; 3782 subsystem_device_id = pdev->subsystem_device; 3783 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) | 3784 subsystem_vendor_id); 3785 3786#ifdef CCISS_DEBUG 3787 printk("command = %x\n", command); 3788 printk("irq = %x\n", pdev->irq); 3789 printk("board_id = %x\n", board_id); 3790#endif /* CCISS_DEBUG */ 3791 3792/* If the kernel supports MSI/MSI-X we will try to enable that functionality, 3793 * else we use the IO-APIC interrupt assigned to us by system ROM. 3794 */ 3795 cciss_interrupt_mode(c, pdev, board_id); 3796 3797 /* find the memory BAR */ 3798 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3799 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) 3800 break; 3801 } 3802 if (i == DEVICE_COUNT_RESOURCE) { 3803 printk(KERN_WARNING "cciss: No memory BAR found\n"); 3804 err = -ENODEV; 3805 goto err_out_free_res; 3806 } 3807 3808 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits 3809 * already removed 3810 */ 3811 3812#ifdef CCISS_DEBUG 3813 printk("address 0 = %lx\n", c->paddr); 3814#endif /* CCISS_DEBUG */ 3815 c->vaddr = remap_pci_mem(c->paddr, 0x250); 3816 3817 /* Wait for the board to become ready. (PCI hotplug needs this.) 3818 * We poll for up to 120 secs, once per 100ms. */ 3819 for (i = 0; i < 1200; i++) { 3820 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET); 3821 if (scratchpad == CCISS_FIRMWARE_READY) 3822 break; 3823 set_current_state(TASK_INTERRUPTIBLE); 3824 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */ 3825 } 3826 if (scratchpad != CCISS_FIRMWARE_READY) { 3827 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n"); 3828 err = -ENODEV; 3829 goto err_out_free_res; 3830 } 3831 3832 /* get the address index number */ 3833 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET); 3834 cfg_base_addr &= (__u32) 0x0000ffff; 3835#ifdef CCISS_DEBUG 3836 printk("cfg base address = %x\n", cfg_base_addr); 3837#endif /* CCISS_DEBUG */ 3838 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr); 3839#ifdef CCISS_DEBUG 3840 printk("cfg base address index = %llx\n", 3841 (unsigned long long)cfg_base_addr_index); 3842#endif /* CCISS_DEBUG */ 3843 if (cfg_base_addr_index == -1) { 3844 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n"); 3845 err = -ENODEV; 3846 goto err_out_free_res; 3847 } 3848 3849 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET); 3850#ifdef CCISS_DEBUG 3851 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset); 3852#endif /* CCISS_DEBUG */ 3853 c->cfgtable = remap_pci_mem(pci_resource_start(pdev, 3854 cfg_base_addr_index) + 3855 cfg_offset, sizeof(CfgTable_struct)); 3856 c->board_id = board_id; 3857 3858#ifdef CCISS_DEBUG 3859 print_cfg_table(c->cfgtable); 3860#endif /* CCISS_DEBUG */ 3861 3862 /* Some controllers support Zero Memory Raid (ZMR). 3863 * When configured in ZMR mode the number of supported 3864 * commands drops to 64. So instead of just setting an 3865 * arbitrary value we make the driver a little smarter. 3866 * We read the config table to tell us how many commands 3867 * are supported on the controller then subtract 4 to 3868 * leave a little room for ioctl calls. 3869 */ 3870 c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); 3871 for (i = 0; i < ARRAY_SIZE(products); i++) { 3872 if (board_id == products[i].board_id) { 3873 c->product_name = products[i].product_name; 3874 c->access = *(products[i].access); 3875 c->nr_cmds = c->max_commands - 4; 3876 break; 3877 } 3878 } 3879 if ((readb(&c->cfgtable->Signature[0]) != 'C') || 3880 (readb(&c->cfgtable->Signature[1]) != 'I') || 3881 (readb(&c->cfgtable->Signature[2]) != 'S') || 3882 (readb(&c->cfgtable->Signature[3]) != 'S')) { 3883 printk("Does not appear to be a valid CISS config table\n"); 3884 err = -ENODEV; 3885 goto err_out_free_res; 3886 } 3887 /* We didn't find the controller in our list. We know the 3888 * signature is valid. If it's an HP device let's try to 3889 * bind to the device and fire it up. Otherwise we bail. 3890 */ 3891 if (i == ARRAY_SIZE(products)) { 3892 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) { 3893 c->product_name = products[i-1].product_name; 3894 c->access = *(products[i-1].access); 3895 c->nr_cmds = c->max_commands - 4; 3896 printk(KERN_WARNING "cciss: This is an unknown " 3897 "Smart Array controller.\n" 3898 "cciss: Please update to the latest driver " 3899 "available from www.hp.com.\n"); 3900 } else { 3901 printk(KERN_WARNING "cciss: Sorry, I don't know how" 3902 " to access the Smart Array controller %08lx\n" 3903 , (unsigned long)board_id); 3904 err = -ENODEV; 3905 goto err_out_free_res; 3906 } 3907 } 3908#ifdef CONFIG_X86 3909 { 3910 /* Need to enable prefetch in the SCSI core for 6400 in x86 */ 3911 __u32 prefetch; 3912 prefetch = readl(&(c->cfgtable->SCSI_Prefetch)); 3913 prefetch |= 0x100; 3914 writel(prefetch, &(c->cfgtable->SCSI_Prefetch)); 3915 } 3916#endif 3917 3918 /* Disabling DMA prefetch and refetch for the P600. 3919 * An ASIC bug may result in accesses to invalid memory addresses. 3920 * We've disabled prefetch for some time now. Testing with XEN 3921 * kernels revealed a bug in the refetch if dom0 resides on a P600. 3922 */ 3923 if(board_id == 0x3225103C) { 3924 __u32 dma_prefetch; 3925 __u32 dma_refetch; 3926 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG); 3927 dma_prefetch |= 0x8000; 3928 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG); 3929 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch); 3930 dma_refetch |= 0x1; 3931 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch); 3932 } 3933 3934#ifdef CCISS_DEBUG 3935 printk("Trying to put board into Simple mode\n"); 3936#endif /* CCISS_DEBUG */ 3937 c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); 3938 /* Update the field, and then ring the doorbell */ 3939 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest)); 3940 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL); 3941 3942 /* under certain very rare conditions, this can take awhile. 3943 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right 3944 * as we enter this code.) */ 3945 for (i = 0; i < MAX_CONFIG_WAIT; i++) { 3946 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) 3947 break; 3948 /* delay and try again */ 3949 set_current_state(TASK_INTERRUPTIBLE); 3950 schedule_timeout(msecs_to_jiffies(1)); 3951 } 3952 3953#ifdef CCISS_DEBUG 3954 printk(KERN_DEBUG "I counter got to %d %x\n", i, 3955 readl(c->vaddr + SA5_DOORBELL)); 3956#endif /* CCISS_DEBUG */ 3957#ifdef CCISS_DEBUG 3958 print_cfg_table(c->cfgtable); 3959#endif /* CCISS_DEBUG */ 3960 3961 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) { 3962 printk(KERN_WARNING "cciss: unable to get board into" 3963 " simple mode\n"); 3964 err = -ENODEV; 3965 goto err_out_free_res; 3966 } 3967 return 0; 3968 3969err_out_free_res: 3970 /* 3971 * Deliberately omit pci_disable_device(): it does something nasty to 3972 * Smart Array controllers that pci_enable_device does not undo 3973 */ 3974 pci_release_regions(pdev); 3975 return err; 3976} 3977 3978/* Function to find the first free pointer into our hba[] array 3979 * Returns -1 if no free entries are left. 3980 */ 3981static int alloc_cciss_hba(void) 3982{ 3983 int i; 3984 3985 for (i = 0; i < MAX_CTLR; i++) { 3986 if (!hba[i]) { 3987 ctlr_info_t *p; 3988 3989 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); 3990 if (!p) 3991 goto Enomem; 3992 hba[i] = p; 3993 return i; 3994 } 3995 } 3996 printk(KERN_WARNING "cciss: This driver supports a maximum" 3997 " of %d controllers.\n", MAX_CTLR); 3998 return -1; 3999Enomem: 4000 printk(KERN_ERR "cciss: out of memory.\n"); 4001 return -1; 4002} 4003 4004static void free_hba(int n) 4005{ 4006 ctlr_info_t *h = hba[n]; 4007 int i; 4008 4009 hba[n] = NULL; 4010 for (i = 0; i < h->highest_lun + 1; i++) 4011 if (h->gendisk[i] != NULL) 4012 put_disk(h->gendisk[i]); 4013 kfree(h); 4014} 4015 4016/* Send a message CDB to the firmware. */ 4017static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) 4018{ 4019 typedef struct { 4020 CommandListHeader_struct CommandHeader; 4021 RequestBlock_struct Request; 4022 ErrDescriptor_struct ErrorDescriptor; 4023 } Command; 4024 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); 4025 Command *cmd; 4026 dma_addr_t paddr64; 4027 uint32_t paddr32, tag; 4028 void __iomem *vaddr; 4029 int i, err; 4030 4031 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 4032 if (vaddr == NULL) 4033 return -ENOMEM; 4034 4035 /* The Inbound Post Queue only accepts 32-bit physical addresses for the 4036 CCISS commands, so they must be allocated from the lower 4GiB of 4037 memory. */ 4038 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 4039 if (err) { 4040 iounmap(vaddr); 4041 return -ENOMEM; 4042 } 4043 4044 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); 4045 if (cmd == NULL) { 4046 iounmap(vaddr); 4047 return -ENOMEM; 4048 } 4049 4050 /* This must fit, because of the 32-bit consistent DMA mask. Also, 4051 although there's no guarantee, we assume that the address is at 4052 least 4-byte aligned (most likely, it's page-aligned). */ 4053 paddr32 = paddr64; 4054 4055 cmd->CommandHeader.ReplyQueue = 0; 4056 cmd->CommandHeader.SGList = 0; 4057 cmd->CommandHeader.SGTotal = 0; 4058 cmd->CommandHeader.Tag.lower = paddr32; 4059 cmd->CommandHeader.Tag.upper = 0; 4060 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); 4061 4062 cmd->Request.CDBLen = 16; 4063 cmd->Request.Type.Type = TYPE_MSG; 4064 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; 4065 cmd->Request.Type.Direction = XFER_NONE; 4066 cmd->Request.Timeout = 0; /* Don't time out */ 4067 cmd->Request.CDB[0] = opcode; 4068 cmd->Request.CDB[1] = type; 4069 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ 4070 4071 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); 4072 cmd->ErrorDescriptor.Addr.upper = 0; 4073 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); 4074 4075 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); 4076 4077 for (i = 0; i < 10; i++) { 4078 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); 4079 if ((tag & ~3) == paddr32) 4080 break; 4081 schedule_timeout_uninterruptible(HZ); 4082 } 4083 4084 iounmap(vaddr); 4085 4086 /* we leak the DMA buffer here ... no choice since the controller could 4087 still complete the command. */ 4088 if (i == 10) { 4089 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n", 4090 opcode, type); 4091 return -ETIMEDOUT; 4092 } 4093 4094 pci_free_consistent(pdev, cmd_sz, cmd, paddr64); 4095 4096 if (tag & 2) { 4097 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n", 4098 opcode, type); 4099 return -EIO; 4100 } 4101 4102 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n", 4103 opcode, type); 4104 return 0; 4105} 4106 4107#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0) 4108#define cciss_noop(p) cciss_message(p, 3, 0) 4109 4110static __devinit int cciss_reset_msi(struct pci_dev *pdev) 4111{ 4112/* the #defines are stolen from drivers/pci/msi.h. */ 4113#define msi_control_reg(base) (base + PCI_MSI_FLAGS) 4114#define PCI_MSIX_FLAGS_ENABLE (1 << 15) 4115 4116 int pos; 4117 u16 control = 0; 4118 4119 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); 4120 if (pos) { 4121 pci_read_config_word(pdev, msi_control_reg(pos), &control); 4122 if (control & PCI_MSI_FLAGS_ENABLE) { 4123 printk(KERN_INFO "cciss: resetting MSI\n"); 4124 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE); 4125 } 4126 } 4127 4128 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); 4129 if (pos) { 4130 pci_read_config_word(pdev, msi_control_reg(pos), &control); 4131 if (control & PCI_MSIX_FLAGS_ENABLE) { 4132 printk(KERN_INFO "cciss: resetting MSI-X\n"); 4133 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE); 4134 } 4135 } 4136 4137 return 0; 4138} 4139 4140/* This does a hard reset of the controller using PCI power management 4141 * states. */ 4142static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev) 4143{ 4144 u16 pmcsr, saved_config_space[32]; 4145 int i, pos; 4146 4147 printk(KERN_INFO "cciss: using PCI PM to reset controller\n"); 4148 4149 /* This is very nearly the same thing as 4150 4151 pci_save_state(pci_dev); 4152 pci_set_power_state(pci_dev, PCI_D3hot); 4153 pci_set_power_state(pci_dev, PCI_D0); 4154 pci_restore_state(pci_dev); 4155 4156 but we can't use these nice canned kernel routines on 4157 kexec, because they also check the MSI/MSI-X state in PCI 4158 configuration space and do the wrong thing when it is 4159 set/cleared. Also, the pci_save/restore_state functions 4160 violate the ordering requirements for restoring the 4161 configuration space from the CCISS document (see the 4162 comment below). So we roll our own .... */ 4163 4164 for (i = 0; i < 32; i++) 4165 pci_read_config_word(pdev, 2*i, &saved_config_space[i]); 4166 4167 pos = pci_find_capability(pdev, PCI_CAP_ID_PM); 4168 if (pos == 0) { 4169 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n"); 4170 return -ENODEV; 4171 } 4172 4173 /* Quoting from the Open CISS Specification: "The Power 4174 * Management Control/Status Register (CSR) controls the power 4175 * state of the device. The normal operating state is D0, 4176 * CSR=00h. The software off state is D3, CSR=03h. To reset 4177 * the controller, place the interface device in D3 then to 4178 * D0, this causes a secondary PCI reset which will reset the 4179 * controller." */ 4180 4181 /* enter the D3hot power management state */ 4182 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); 4183 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4184 pmcsr |= PCI_D3hot; 4185 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4186 4187 schedule_timeout_uninterruptible(HZ >> 1); 4188 4189 /* enter the D0 power management state */ 4190 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 4191 pmcsr |= PCI_D0; 4192 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 4193 4194 schedule_timeout_uninterruptible(HZ >> 1); 4195 4196 /* Restore the PCI configuration space. The Open CISS 4197 * Specification says, "Restore the PCI Configuration 4198 * Registers, offsets 00h through 60h. It is important to 4199 * restore the command register, 16-bits at offset 04h, 4200 * last. Do not restore the configuration status register, 4201 * 16-bits at offset 06h." Note that the offset is 2*i. */ 4202 for (i = 0; i < 32; i++) { 4203 if (i == 2 || i == 3) 4204 continue; 4205 pci_write_config_word(pdev, 2*i, saved_config_space[i]); 4206 } 4207 wmb(); 4208 pci_write_config_word(pdev, 4, saved_config_space[2]); 4209 4210 return 0; 4211} 4212 4213/* 4214 * This is it. Find all the controllers and register them. I really hate 4215 * stealing all these major device numbers. 4216 * returns the number of block devices registered. 4217 */ 4218static int __devinit cciss_init_one(struct pci_dev *pdev, 4219 const struct pci_device_id *ent) 4220{ 4221 int i; 4222 int j = 0; 4223 int rc; 4224 int dac, return_code; 4225 InquiryData_struct *inq_buff; 4226 4227 if (reset_devices) { 4228 /* Reset the controller with a PCI power-cycle */ 4229 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev)) 4230 return -ENODEV; 4231 4232 /* Now try to get the controller to respond to a no-op. Some 4233 devices (notably the HP Smart Array 5i Controller) need 4234 up to 30 seconds to respond. */ 4235 for (i=0; i<30; i++) { 4236 if (cciss_noop(pdev) == 0) 4237 break; 4238 4239 schedule_timeout_uninterruptible(HZ); 4240 } 4241 if (i == 30) { 4242 printk(KERN_ERR "cciss: controller seems dead\n"); 4243 return -EBUSY; 4244 } 4245 } 4246 4247 i = alloc_cciss_hba(); 4248 if (i < 0) 4249 return -1; 4250 4251 hba[i]->busy_initializing = 1; 4252 INIT_HLIST_HEAD(&hba[i]->cmpQ); 4253 INIT_HLIST_HEAD(&hba[i]->reqQ); 4254 mutex_init(&hba[i]->busy_shutting_down); 4255 4256 if (cciss_pci_init(hba[i], pdev) != 0) 4257 goto clean_no_release_regions; 4258 4259 sprintf(hba[i]->devname, "cciss%d", i); 4260 hba[i]->ctlr = i; 4261 hba[i]->pdev = pdev; 4262 4263 init_completion(&hba[i]->scan_wait); 4264 4265 if (cciss_create_hba_sysfs_entry(hba[i])) 4266 goto clean0; 4267 4268 /* configure PCI DMA stuff */ 4269 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) 4270 dac = 1; 4271 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) 4272 dac = 0; 4273 else { 4274 printk(KERN_ERR "cciss: no suitable DMA available\n"); 4275 goto clean1; 4276 } 4277 4278 /* 4279 * register with the major number, or get a dynamic major number 4280 * by passing 0 as argument. This is done for greater than 4281 * 8 controller support. 4282 */ 4283 if (i < MAX_CTLR_ORIG) 4284 hba[i]->major = COMPAQ_CISS_MAJOR + i; 4285 rc = register_blkdev(hba[i]->major, hba[i]->devname); 4286 if (rc == -EBUSY || rc == -EINVAL) { 4287 printk(KERN_ERR 4288 "cciss: Unable to get major number %d for %s " 4289 "on hba %d\n", hba[i]->major, hba[i]->devname, i); 4290 goto clean1; 4291 } else { 4292 if (i >= MAX_CTLR_ORIG) 4293 hba[i]->major = rc; 4294 } 4295 4296 /* make sure the board interrupts are off */ 4297 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF); 4298 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr, 4299 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) { 4300 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n", 4301 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname); 4302 goto clean2; 4303 } 4304 4305 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n", 4306 hba[i]->devname, pdev->device, pci_name(pdev), 4307 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not"); 4308 4309 hba[i]->cmd_pool_bits = 4310 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4311 * sizeof(unsigned long), GFP_KERNEL); 4312 hba[i]->cmd_pool = (CommandList_struct *) 4313 pci_alloc_consistent(hba[i]->pdev, 4314 hba[i]->nr_cmds * sizeof(CommandList_struct), 4315 &(hba[i]->cmd_pool_dhandle)); 4316 hba[i]->errinfo_pool = (ErrorInfo_struct *) 4317 pci_alloc_consistent(hba[i]->pdev, 4318 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4319 &(hba[i]->errinfo_pool_dhandle)); 4320 if ((hba[i]->cmd_pool_bits == NULL) 4321 || (hba[i]->cmd_pool == NULL) 4322 || (hba[i]->errinfo_pool == NULL)) { 4323 printk(KERN_ERR "cciss: out of memory"); 4324 goto clean4; 4325 } 4326 spin_lock_init(&hba[i]->lock); 4327 4328 /* Initialize the pdev driver private data. 4329 have it point to hba[i]. */ 4330 pci_set_drvdata(pdev, hba[i]); 4331 /* command and error info recs zeroed out before 4332 they are used */ 4333 memset(hba[i]->cmd_pool_bits, 0, 4334 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) 4335 * sizeof(unsigned long)); 4336 4337 hba[i]->num_luns = 0; 4338 hba[i]->highest_lun = -1; 4339 for (j = 0; j < CISS_MAX_LUN; j++) { 4340 hba[i]->drv[j] = NULL; 4341 hba[i]->gendisk[j] = NULL; 4342 } 4343 4344 cciss_scsi_setup(i); 4345 4346 /* Turn the interrupts on so we can service requests */ 4347 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON); 4348 4349 /* Get the firmware version */ 4350 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); 4351 if (inq_buff == NULL) { 4352 printk(KERN_ERR "cciss: out of memory\n"); 4353 goto clean4; 4354 } 4355 4356 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff, 4357 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD); 4358 if (return_code == IO_OK) { 4359 hba[i]->firm_ver[0] = inq_buff->data_byte[32]; 4360 hba[i]->firm_ver[1] = inq_buff->data_byte[33]; 4361 hba[i]->firm_ver[2] = inq_buff->data_byte[34]; 4362 hba[i]->firm_ver[3] = inq_buff->data_byte[35]; 4363 } else { /* send command failed */ 4364 printk(KERN_WARNING "cciss: unable to determine firmware" 4365 " version of controller\n"); 4366 } 4367 kfree(inq_buff); 4368 4369 cciss_procinit(i); 4370 4371 hba[i]->cciss_max_sectors = 2048; 4372 4373 rebuild_lun_table(hba[i], 1, 0); 4374 hba[i]->busy_initializing = 0; 4375 return 1; 4376 4377clean4: 4378 kfree(hba[i]->cmd_pool_bits); 4379 if (hba[i]->cmd_pool) 4380 pci_free_consistent(hba[i]->pdev, 4381 hba[i]->nr_cmds * sizeof(CommandList_struct), 4382 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4383 if (hba[i]->errinfo_pool) 4384 pci_free_consistent(hba[i]->pdev, 4385 hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4386 hba[i]->errinfo_pool, 4387 hba[i]->errinfo_pool_dhandle); 4388 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]); 4389clean2: 4390 unregister_blkdev(hba[i]->major, hba[i]->devname); 4391clean1: 4392 cciss_destroy_hba_sysfs_entry(hba[i]); 4393clean0: 4394 pci_release_regions(pdev); 4395clean_no_release_regions: 4396 hba[i]->busy_initializing = 0; 4397 4398 /* 4399 * Deliberately omit pci_disable_device(): it does something nasty to 4400 * Smart Array controllers that pci_enable_device does not undo 4401 */ 4402 pci_set_drvdata(pdev, NULL); 4403 free_hba(i); 4404 return -1; 4405} 4406 4407static void cciss_shutdown(struct pci_dev *pdev) 4408{ 4409 ctlr_info_t *tmp_ptr; 4410 int i; 4411 char flush_buf[4]; 4412 int return_code; 4413 4414 tmp_ptr = pci_get_drvdata(pdev); 4415 if (tmp_ptr == NULL) 4416 return; 4417 i = tmp_ptr->ctlr; 4418 if (hba[i] == NULL) 4419 return; 4420 4421 /* Turn board interrupts off and send the flush cache command */ 4422 /* sendcmd will turn off interrupt, and send the flush... 4423 * To write all data in the battery backed cache to disks */ 4424 memset(flush_buf, 0, 4); 4425 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 4426 CTLR_LUNID, TYPE_CMD); 4427 if (return_code == IO_OK) { 4428 printk(KERN_INFO "Completed flushing cache on controller %d\n", i); 4429 } else { 4430 printk(KERN_WARNING "Error flushing cache on controller %d\n", i); 4431 } 4432 free_irq(hba[i]->intr[2], hba[i]); 4433} 4434 4435static void __devexit cciss_remove_one(struct pci_dev *pdev) 4436{ 4437 ctlr_info_t *tmp_ptr; 4438 int i, j; 4439 4440 if (pci_get_drvdata(pdev) == NULL) { 4441 printk(KERN_ERR "cciss: Unable to remove device \n"); 4442 return; 4443 } 4444 4445 tmp_ptr = pci_get_drvdata(pdev); 4446 i = tmp_ptr->ctlr; 4447 if (hba[i] == NULL) { 4448 printk(KERN_ERR "cciss: device appears to " 4449 "already be removed \n"); 4450 return; 4451 } 4452 4453 mutex_lock(&hba[i]->busy_shutting_down); 4454 4455 remove_from_scan_list(hba[i]); 4456 remove_proc_entry(hba[i]->devname, proc_cciss); 4457 unregister_blkdev(hba[i]->major, hba[i]->devname); 4458 4459 /* remove it from the disk list */ 4460 for (j = 0; j < CISS_MAX_LUN; j++) { 4461 struct gendisk *disk = hba[i]->gendisk[j]; 4462 if (disk) { 4463 struct request_queue *q = disk->queue; 4464 4465 if (disk->flags & GENHD_FL_UP) { 4466 cciss_destroy_ld_sysfs_entry(hba[i], j, 1); 4467 del_gendisk(disk); 4468 } 4469 if (q) 4470 blk_cleanup_queue(q); 4471 } 4472 } 4473 4474#ifdef CONFIG_CISS_SCSI_TAPE 4475 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */ 4476#endif 4477 4478 cciss_shutdown(pdev); 4479 4480#ifdef CONFIG_PCI_MSI 4481 if (hba[i]->msix_vector) 4482 pci_disable_msix(hba[i]->pdev); 4483 else if (hba[i]->msi_vector) 4484 pci_disable_msi(hba[i]->pdev); 4485#endif /* CONFIG_PCI_MSI */ 4486 4487 iounmap(hba[i]->vaddr); 4488 4489 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct), 4490 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); 4491 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct), 4492 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle); 4493 kfree(hba[i]->cmd_pool_bits); 4494 /* 4495 * Deliberately omit pci_disable_device(): it does something nasty to 4496 * Smart Array controllers that pci_enable_device does not undo 4497 */ 4498 pci_release_regions(pdev); 4499 pci_set_drvdata(pdev, NULL); 4500 cciss_destroy_hba_sysfs_entry(hba[i]); 4501 mutex_unlock(&hba[i]->busy_shutting_down); 4502 free_hba(i); 4503} 4504 4505static struct pci_driver cciss_pci_driver = { 4506 .name = "cciss", 4507 .probe = cciss_init_one, 4508 .remove = __devexit_p(cciss_remove_one), 4509 .id_table = cciss_pci_device_id, /* id_table */ 4510 .shutdown = cciss_shutdown, 4511}; 4512 4513/* 4514 * This is it. Register the PCI driver information for the cards we control 4515 * the OS will call our registered routines when it finds one of our cards. 4516 */ 4517static int __init cciss_init(void) 4518{ 4519 int err; 4520 4521 /* 4522 * The hardware requires that commands are aligned on a 64-bit 4523 * boundary. Given that we use pci_alloc_consistent() to allocate an 4524 * array of them, the size must be a multiple of 8 bytes. 4525 */ 4526 BUILD_BUG_ON(sizeof(CommandList_struct) % 8); 4527 4528 printk(KERN_INFO DRIVER_NAME "\n"); 4529 4530 err = bus_register(&cciss_bus_type); 4531 if (err) 4532 return err; 4533 4534 /* Start the scan thread */ 4535 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan"); 4536 if (IS_ERR(cciss_scan_thread)) { 4537 err = PTR_ERR(cciss_scan_thread); 4538 goto err_bus_unregister; 4539 } 4540 4541 /* Register for our PCI devices */ 4542 err = pci_register_driver(&cciss_pci_driver); 4543 if (err) 4544 goto err_thread_stop; 4545 4546 return err; 4547 4548err_thread_stop: 4549 kthread_stop(cciss_scan_thread); 4550err_bus_unregister: 4551 bus_unregister(&cciss_bus_type); 4552 4553 return err; 4554} 4555 4556static void __exit cciss_cleanup(void) 4557{ 4558 int i; 4559 4560 pci_unregister_driver(&cciss_pci_driver); 4561 /* double check that all controller entrys have been removed */ 4562 for (i = 0; i < MAX_CTLR; i++) { 4563 if (hba[i] != NULL) { 4564 printk(KERN_WARNING "cciss: had to remove" 4565 " controller %d\n", i); 4566 cciss_remove_one(hba[i]->pdev); 4567 } 4568 } 4569 kthread_stop(cciss_scan_thread); 4570 remove_proc_entry("driver/cciss", NULL); 4571 bus_unregister(&cciss_bus_type); 4572} 4573 4574static void fail_all_cmds(unsigned long ctlr) 4575{ 4576 /* If we get here, the board is apparently dead. */ 4577 ctlr_info_t *h = hba[ctlr]; 4578 CommandList_struct *c; 4579 unsigned long flags; 4580 4581 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr); 4582 h->alive = 0; /* the controller apparently died... */ 4583 4584 spin_lock_irqsave(CCISS_LOCK(ctlr), flags); 4585 4586 pci_disable_device(h->pdev); /* Make sure it is really dead. */ 4587 4588 /* move everything off the request queue onto the completed queue */ 4589 while (!hlist_empty(&h->reqQ)) { 4590 c = hlist_entry(h->reqQ.first, CommandList_struct, list); 4591 removeQ(c); 4592 h->Qdepth--; 4593 addQ(&h->cmpQ, c); 4594 } 4595 4596 /* Now, fail everything on the completed queue with a HW error */ 4597 while (!hlist_empty(&h->cmpQ)) { 4598 c = hlist_entry(h->cmpQ.first, CommandList_struct, list); 4599 removeQ(c); 4600 if (c->cmd_type != CMD_MSG_STALE) 4601 c->err_info->CommandStatus = CMD_HARDWARE_ERR; 4602 if (c->cmd_type == CMD_RWREQ) { 4603 complete_command(h, c, 0); 4604 } else if (c->cmd_type == CMD_IOCTL_PEND) 4605 complete(c->waiting); 4606#ifdef CONFIG_CISS_SCSI_TAPE 4607 else if (c->cmd_type == CMD_SCSI) 4608 complete_scsi_command(c, 0, 0); 4609#endif 4610 } 4611 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 4612 return; 4613} 4614 4615module_init(cciss_init); 4616module_exit(cciss_cleanup); 4617