| 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 */ |
| 63 | MODULE_AUTHOR("Hewlett-Packard Company"); |
| 64 | MODULE_DESCRIPTION("Driver for HP Smart Array Controllers"); |
| 65 | MODULE_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"); |
| 68 | MODULE_VERSION("3.6.20"); |
| 69 | MODULE_LICENSE("GPL"); |
| 70 | |
| 71 | static int cciss_allow_hpsa; |
| 72 | module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR); |
| 73 | MODULE_PARM_DESC(cciss_allow_hpsa, |
| 74 | "Prevent cciss driver from accessing hardware known to be " |
| 75 | " supported by the hpsa driver"); |
| 76 | |
| 77 | #include "cciss_cmd.h" |
| 78 | #include "cciss.h" |
| 79 | #include <linux/cciss_ioctl.h> |
| 80 | |
| 81 | /* define the PCI info for the cards we can control */ |
| 82 | static const struct pci_device_id cciss_pci_device_id[] = { |
| 83 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070}, |
| 84 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080}, |
| 85 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082}, |
| 86 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083}, |
| 87 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091}, |
| 88 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A}, |
| 89 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B}, |
| 90 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C}, |
| 91 | {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D}, |
| 92 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225}, |
| 93 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223}, |
| 94 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234}, |
| 95 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235}, |
| 96 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211}, |
| 97 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212}, |
| 98 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213}, |
| 99 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214}, |
| 100 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215}, |
| 101 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237}, |
| 102 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D}, |
| 103 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241}, |
| 104 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243}, |
| 105 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245}, |
| 106 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247}, |
| 107 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249}, |
| 108 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A}, |
| 109 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B}, |
| 110 | {0,} |
| 111 | }; |
| 112 | |
| 113 | MODULE_DEVICE_TABLE(pci, cciss_pci_device_id); |
| 114 | |
| 115 | /* board_id = Subsystem Device ID & Vendor ID |
| 116 | * product = Marketing Name for the board |
| 117 | * access = Address of the struct of function pointers |
| 118 | */ |
| 119 | static struct board_type products[] = { |
| 120 | {0x40700E11, "Smart Array 5300", &SA5_access}, |
| 121 | {0x40800E11, "Smart Array 5i", &SA5B_access}, |
| 122 | {0x40820E11, "Smart Array 532", &SA5B_access}, |
| 123 | {0x40830E11, "Smart Array 5312", &SA5B_access}, |
| 124 | {0x409A0E11, "Smart Array 641", &SA5_access}, |
| 125 | {0x409B0E11, "Smart Array 642", &SA5_access}, |
| 126 | {0x409C0E11, "Smart Array 6400", &SA5_access}, |
| 127 | {0x409D0E11, "Smart Array 6400 EM", &SA5_access}, |
| 128 | {0x40910E11, "Smart Array 6i", &SA5_access}, |
| 129 | {0x3225103C, "Smart Array P600", &SA5_access}, |
| 130 | {0x3235103C, "Smart Array P400i", &SA5_access}, |
| 131 | {0x3211103C, "Smart Array E200i", &SA5_access}, |
| 132 | {0x3212103C, "Smart Array E200", &SA5_access}, |
| 133 | {0x3213103C, "Smart Array E200i", &SA5_access}, |
| 134 | {0x3214103C, "Smart Array E200i", &SA5_access}, |
| 135 | {0x3215103C, "Smart Array E200i", &SA5_access}, |
| 136 | {0x3237103C, "Smart Array E500", &SA5_access}, |
| 137 | /* controllers below this line are also supported by the hpsa driver. */ |
| 138 | #define HPSA_BOUNDARY 0x3223103C |
| 139 | {0x3223103C, "Smart Array P800", &SA5_access}, |
| 140 | {0x3234103C, "Smart Array P400", &SA5_access}, |
| 141 | {0x323D103C, "Smart Array P700m", &SA5_access}, |
| 142 | {0x3241103C, "Smart Array P212", &SA5_access}, |
| 143 | {0x3243103C, "Smart Array P410", &SA5_access}, |
| 144 | {0x3245103C, "Smart Array P410i", &SA5_access}, |
| 145 | {0x3247103C, "Smart Array P411", &SA5_access}, |
| 146 | {0x3249103C, "Smart Array P812", &SA5_access}, |
| 147 | {0x324A103C, "Smart Array P712m", &SA5_access}, |
| 148 | {0x324B103C, "Smart Array P711m", &SA5_access}, |
| 149 | }; |
| 150 | |
| 151 | /* How long to wait (in milliseconds) for board to go into simple mode */ |
| 152 | #define MAX_CONFIG_WAIT 30000 |
| 153 | #define MAX_IOCTL_CONFIG_WAIT 1000 |
| 154 | |
| 155 | /*define how many times we will try a command because of bus resets */ |
| 156 | #define MAX_CMD_RETRIES 3 |
| 157 | |
| 158 | #define MAX_CTLR 32 |
| 159 | |
| 160 | /* Originally cciss driver only supports 8 major numbers */ |
| 161 | #define MAX_CTLR_ORIG 8 |
| 162 | |
| 163 | static ctlr_info_t *hba[MAX_CTLR]; |
| 164 | |
| 165 | static struct task_struct *cciss_scan_thread; |
| 166 | static DEFINE_MUTEX(scan_mutex); |
| 167 | static LIST_HEAD(scan_q); |
| 168 | |
| 169 | static void do_cciss_request(struct request_queue *q); |
| 170 | static irqreturn_t do_cciss_intr(int irq, void *dev_id); |
| 171 | static int cciss_open(struct block_device *bdev, fmode_t mode); |
| 172 | static int cciss_release(struct gendisk *disk, fmode_t mode); |
| 173 | static int cciss_ioctl(struct block_device *bdev, fmode_t mode, |
| 174 | unsigned int cmd, unsigned long arg); |
| 175 | static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); |
| 176 | |
| 177 | static int cciss_revalidate(struct gendisk *disk); |
| 178 | static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl); |
| 179 | static int deregister_disk(ctlr_info_t *h, int drv_index, |
| 180 | int clear_all, int via_ioctl); |
| 181 | |
| 182 | static void cciss_read_capacity(int ctlr, int logvol, |
| 183 | sector_t *total_size, unsigned int *block_size); |
| 184 | static void cciss_read_capacity_16(int ctlr, int logvol, |
| 185 | sector_t *total_size, unsigned int *block_size); |
| 186 | static void cciss_geometry_inquiry(int ctlr, int logvol, |
| 187 | sector_t total_size, |
| 188 | unsigned int block_size, InquiryData_struct *inq_buff, |
| 189 | drive_info_struct *drv); |
| 190 | static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *, |
| 191 | __u32); |
| 192 | static void start_io(ctlr_info_t *h); |
| 193 | static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, |
| 194 | __u8 page_code, unsigned char scsi3addr[], |
| 195 | int cmd_type); |
| 196 | static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, |
| 197 | int attempt_retry); |
| 198 | static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c); |
| 199 | |
| 200 | static void fail_all_cmds(unsigned long ctlr); |
| 201 | static int add_to_scan_list(struct ctlr_info *h); |
| 202 | static int scan_thread(void *data); |
| 203 | static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c); |
| 204 | static void cciss_hba_release(struct device *dev); |
| 205 | static void cciss_device_release(struct device *dev); |
| 206 | static void cciss_free_gendisk(ctlr_info_t *h, int drv_index); |
| 207 | static void cciss_free_drive_info(ctlr_info_t *h, int drv_index); |
| 208 | |
| 209 | #ifdef CONFIG_PROC_FS |
| 210 | static void cciss_procinit(int i); |
| 211 | #else |
| 212 | static void cciss_procinit(int i) |
| 213 | { |
| 214 | } |
| 215 | #endif /* CONFIG_PROC_FS */ |
| 216 | |
| 217 | #ifdef CONFIG_COMPAT |
| 218 | static int cciss_compat_ioctl(struct block_device *, fmode_t, |
| 219 | unsigned, unsigned long); |
| 220 | #endif |
| 221 | |
| 222 | static const struct block_device_operations cciss_fops = { |
| 223 | .owner = THIS_MODULE, |
| 224 | .open = cciss_open, |
| 225 | .release = cciss_release, |
| 226 | .locked_ioctl = cciss_ioctl, |
| 227 | .getgeo = cciss_getgeo, |
| 228 | #ifdef CONFIG_COMPAT |
| 229 | .compat_ioctl = cciss_compat_ioctl, |
| 230 | #endif |
| 231 | .revalidate_disk = cciss_revalidate, |
| 232 | }; |
| 233 | |
| 234 | /* |
| 235 | * Enqueuing and dequeuing functions for cmdlists. |
| 236 | */ |
| 237 | static inline void addQ(struct hlist_head *list, CommandList_struct *c) |
| 238 | { |
| 239 | hlist_add_head(&c->list, list); |
| 240 | } |
| 241 | |
| 242 | static inline void removeQ(CommandList_struct *c) |
| 243 | { |
| 244 | /* |
| 245 | * After kexec/dump some commands might still |
| 246 | * be in flight, which the firmware will try |
| 247 | * to complete. Resetting the firmware doesn't work |
| 248 | * with old fw revisions, so we have to mark |
| 249 | * them off as 'stale' to prevent the driver from |
| 250 | * falling over. |
| 251 | */ |
| 252 | if (WARN_ON(hlist_unhashed(&c->list))) { |
| 253 | c->cmd_type = CMD_MSG_STALE; |
| 254 | return; |
| 255 | } |
| 256 | |
| 257 | hlist_del_init(&c->list); |
| 258 | } |
| 259 | |
| 260 | #include "cciss_scsi.c" /* For SCSI tape support */ |
| 261 | |
| 262 | static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", |
| 263 | "UNKNOWN" |
| 264 | }; |
| 265 | #define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1) |
| 266 | |
| 267 | #ifdef CONFIG_PROC_FS |
| 268 | |
| 269 | /* |
| 270 | * Report information about this controller. |
| 271 | */ |
| 272 | #define ENG_GIG 1000000000 |
| 273 | #define ENG_GIG_FACTOR (ENG_GIG/512) |
| 274 | #define ENGAGE_SCSI "engage scsi" |
| 275 | |
| 276 | static struct proc_dir_entry *proc_cciss; |
| 277 | |
| 278 | static void cciss_seq_show_header(struct seq_file *seq) |
| 279 | { |
| 280 | ctlr_info_t *h = seq->private; |
| 281 | |
| 282 | seq_printf(seq, "%s: HP %s Controller\n" |
| 283 | "Board ID: 0x%08lx\n" |
| 284 | "Firmware Version: %c%c%c%c\n" |
| 285 | "IRQ: %d\n" |
| 286 | "Logical drives: %d\n" |
| 287 | "Current Q depth: %d\n" |
| 288 | "Current # commands on controller: %d\n" |
| 289 | "Max Q depth since init: %d\n" |
| 290 | "Max # commands on controller since init: %d\n" |
| 291 | "Max SG entries since init: %d\n", |
| 292 | h->devname, |
| 293 | h->product_name, |
| 294 | (unsigned long)h->board_id, |
| 295 | h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], |
| 296 | h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT], |
| 297 | h->num_luns, |
| 298 | h->Qdepth, h->commands_outstanding, |
| 299 | h->maxQsinceinit, h->max_outstanding, h->maxSG); |
| 300 | |
| 301 | #ifdef CONFIG_CISS_SCSI_TAPE |
| 302 | cciss_seq_tape_report(seq, h->ctlr); |
| 303 | #endif /* CONFIG_CISS_SCSI_TAPE */ |
| 304 | } |
| 305 | |
| 306 | static void *cciss_seq_start(struct seq_file *seq, loff_t *pos) |
| 307 | { |
| 308 | ctlr_info_t *h = seq->private; |
| 309 | unsigned ctlr = h->ctlr; |
| 310 | unsigned long flags; |
| 311 | |
| 312 | /* prevent displaying bogus info during configuration |
| 313 | * or deconfiguration of a logical volume |
| 314 | */ |
| 315 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 316 | if (h->busy_configuring) { |
| 317 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 318 | return ERR_PTR(-EBUSY); |
| 319 | } |
| 320 | h->busy_configuring = 1; |
| 321 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 322 | |
| 323 | if (*pos == 0) |
| 324 | cciss_seq_show_header(seq); |
| 325 | |
| 326 | return pos; |
| 327 | } |
| 328 | |
| 329 | static int cciss_seq_show(struct seq_file *seq, void *v) |
| 330 | { |
| 331 | sector_t vol_sz, vol_sz_frac; |
| 332 | ctlr_info_t *h = seq->private; |
| 333 | unsigned ctlr = h->ctlr; |
| 334 | loff_t *pos = v; |
| 335 | drive_info_struct *drv = h->drv[*pos]; |
| 336 | |
| 337 | if (*pos > h->highest_lun) |
| 338 | return 0; |
| 339 | |
| 340 | if (drv == NULL) /* it's possible for h->drv[] to have holes. */ |
| 341 | return 0; |
| 342 | |
| 343 | if (drv->heads == 0) |
| 344 | return 0; |
| 345 | |
| 346 | vol_sz = drv->nr_blocks; |
| 347 | vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR); |
| 348 | vol_sz_frac *= 100; |
| 349 | sector_div(vol_sz_frac, ENG_GIG_FACTOR); |
| 350 | |
| 351 | if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN) |
| 352 | drv->raid_level = RAID_UNKNOWN; |
| 353 | seq_printf(seq, "cciss/c%dd%d:" |
| 354 | "\t%4u.%02uGB\tRAID %s\n", |
| 355 | ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac, |
| 356 | raid_label[drv->raid_level]); |
| 357 | return 0; |
| 358 | } |
| 359 | |
| 360 | static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 361 | { |
| 362 | ctlr_info_t *h = seq->private; |
| 363 | |
| 364 | if (*pos > h->highest_lun) |
| 365 | return NULL; |
| 366 | *pos += 1; |
| 367 | |
| 368 | return pos; |
| 369 | } |
| 370 | |
| 371 | static void cciss_seq_stop(struct seq_file *seq, void *v) |
| 372 | { |
| 373 | ctlr_info_t *h = seq->private; |
| 374 | |
| 375 | /* Only reset h->busy_configuring if we succeeded in setting |
| 376 | * it during cciss_seq_start. */ |
| 377 | if (v == ERR_PTR(-EBUSY)) |
| 378 | return; |
| 379 | |
| 380 | h->busy_configuring = 0; |
| 381 | } |
| 382 | |
| 383 | static const struct seq_operations cciss_seq_ops = { |
| 384 | .start = cciss_seq_start, |
| 385 | .show = cciss_seq_show, |
| 386 | .next = cciss_seq_next, |
| 387 | .stop = cciss_seq_stop, |
| 388 | }; |
| 389 | |
| 390 | static int cciss_seq_open(struct inode *inode, struct file *file) |
| 391 | { |
| 392 | int ret = seq_open(file, &cciss_seq_ops); |
| 393 | struct seq_file *seq = file->private_data; |
| 394 | |
| 395 | if (!ret) |
| 396 | seq->private = PDE(inode)->data; |
| 397 | |
| 398 | return ret; |
| 399 | } |
| 400 | |
| 401 | static ssize_t |
| 402 | cciss_proc_write(struct file *file, const char __user *buf, |
| 403 | size_t length, loff_t *ppos) |
| 404 | { |
| 405 | int err; |
| 406 | char *buffer; |
| 407 | |
| 408 | #ifndef CONFIG_CISS_SCSI_TAPE |
| 409 | return -EINVAL; |
| 410 | #endif |
| 411 | |
| 412 | if (!buf || length > PAGE_SIZE - 1) |
| 413 | return -EINVAL; |
| 414 | |
| 415 | buffer = (char *)__get_free_page(GFP_KERNEL); |
| 416 | if (!buffer) |
| 417 | return -ENOMEM; |
| 418 | |
| 419 | err = -EFAULT; |
| 420 | if (copy_from_user(buffer, buf, length)) |
| 421 | goto out; |
| 422 | buffer[length] = '\0'; |
| 423 | |
| 424 | #ifdef CONFIG_CISS_SCSI_TAPE |
| 425 | if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) { |
| 426 | struct seq_file *seq = file->private_data; |
| 427 | ctlr_info_t *h = seq->private; |
| 428 | |
| 429 | err = cciss_engage_scsi(h->ctlr); |
| 430 | if (err == 0) |
| 431 | err = length; |
| 432 | } else |
| 433 | #endif /* CONFIG_CISS_SCSI_TAPE */ |
| 434 | err = -EINVAL; |
| 435 | /* might be nice to have "disengage" too, but it's not |
| 436 | safely possible. (only 1 module use count, lock issues.) */ |
| 437 | |
| 438 | out: |
| 439 | free_page((unsigned long)buffer); |
| 440 | return err; |
| 441 | } |
| 442 | |
| 443 | static const struct file_operations cciss_proc_fops = { |
| 444 | .owner = THIS_MODULE, |
| 445 | .open = cciss_seq_open, |
| 446 | .read = seq_read, |
| 447 | .llseek = seq_lseek, |
| 448 | .release = seq_release, |
| 449 | .write = cciss_proc_write, |
| 450 | }; |
| 451 | |
| 452 | static void __devinit cciss_procinit(int i) |
| 453 | { |
| 454 | struct proc_dir_entry *pde; |
| 455 | |
| 456 | if (proc_cciss == NULL) |
| 457 | proc_cciss = proc_mkdir("driver/cciss", NULL); |
| 458 | if (!proc_cciss) |
| 459 | return; |
| 460 | pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP | |
| 461 | S_IROTH, proc_cciss, |
| 462 | &cciss_proc_fops, hba[i]); |
| 463 | } |
| 464 | #endif /* CONFIG_PROC_FS */ |
| 465 | |
| 466 | #define MAX_PRODUCT_NAME_LEN 19 |
| 467 | |
| 468 | #define to_hba(n) container_of(n, struct ctlr_info, dev) |
| 469 | #define to_drv(n) container_of(n, drive_info_struct, dev) |
| 470 | |
| 471 | static ssize_t host_store_rescan(struct device *dev, |
| 472 | struct device_attribute *attr, |
| 473 | const char *buf, size_t count) |
| 474 | { |
| 475 | struct ctlr_info *h = to_hba(dev); |
| 476 | |
| 477 | add_to_scan_list(h); |
| 478 | wake_up_process(cciss_scan_thread); |
| 479 | wait_for_completion_interruptible(&h->scan_wait); |
| 480 | |
| 481 | return count; |
| 482 | } |
| 483 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); |
| 484 | |
| 485 | static ssize_t dev_show_unique_id(struct device *dev, |
| 486 | struct device_attribute *attr, |
| 487 | char *buf) |
| 488 | { |
| 489 | drive_info_struct *drv = to_drv(dev); |
| 490 | struct ctlr_info *h = to_hba(drv->dev.parent); |
| 491 | __u8 sn[16]; |
| 492 | unsigned long flags; |
| 493 | int ret = 0; |
| 494 | |
| 495 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 496 | if (h->busy_configuring) |
| 497 | ret = -EBUSY; |
| 498 | else |
| 499 | memcpy(sn, drv->serial_no, sizeof(sn)); |
| 500 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 501 | |
| 502 | if (ret) |
| 503 | return ret; |
| 504 | else |
| 505 | return snprintf(buf, 16 * 2 + 2, |
| 506 | "%02X%02X%02X%02X%02X%02X%02X%02X" |
| 507 | "%02X%02X%02X%02X%02X%02X%02X%02X\n", |
| 508 | sn[0], sn[1], sn[2], sn[3], |
| 509 | sn[4], sn[5], sn[6], sn[7], |
| 510 | sn[8], sn[9], sn[10], sn[11], |
| 511 | sn[12], sn[13], sn[14], sn[15]); |
| 512 | } |
| 513 | static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL); |
| 514 | |
| 515 | static ssize_t dev_show_vendor(struct device *dev, |
| 516 | struct device_attribute *attr, |
| 517 | char *buf) |
| 518 | { |
| 519 | drive_info_struct *drv = to_drv(dev); |
| 520 | struct ctlr_info *h = to_hba(drv->dev.parent); |
| 521 | char vendor[VENDOR_LEN + 1]; |
| 522 | unsigned long flags; |
| 523 | int ret = 0; |
| 524 | |
| 525 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 526 | if (h->busy_configuring) |
| 527 | ret = -EBUSY; |
| 528 | else |
| 529 | memcpy(vendor, drv->vendor, VENDOR_LEN + 1); |
| 530 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 531 | |
| 532 | if (ret) |
| 533 | return ret; |
| 534 | else |
| 535 | return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor); |
| 536 | } |
| 537 | static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL); |
| 538 | |
| 539 | static ssize_t dev_show_model(struct device *dev, |
| 540 | struct device_attribute *attr, |
| 541 | char *buf) |
| 542 | { |
| 543 | drive_info_struct *drv = to_drv(dev); |
| 544 | struct ctlr_info *h = to_hba(drv->dev.parent); |
| 545 | char model[MODEL_LEN + 1]; |
| 546 | unsigned long flags; |
| 547 | int ret = 0; |
| 548 | |
| 549 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 550 | if (h->busy_configuring) |
| 551 | ret = -EBUSY; |
| 552 | else |
| 553 | memcpy(model, drv->model, MODEL_LEN + 1); |
| 554 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 555 | |
| 556 | if (ret) |
| 557 | return ret; |
| 558 | else |
| 559 | return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model); |
| 560 | } |
| 561 | static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL); |
| 562 | |
| 563 | static ssize_t dev_show_rev(struct device *dev, |
| 564 | struct device_attribute *attr, |
| 565 | char *buf) |
| 566 | { |
| 567 | drive_info_struct *drv = to_drv(dev); |
| 568 | struct ctlr_info *h = to_hba(drv->dev.parent); |
| 569 | char rev[REV_LEN + 1]; |
| 570 | unsigned long flags; |
| 571 | int ret = 0; |
| 572 | |
| 573 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 574 | if (h->busy_configuring) |
| 575 | ret = -EBUSY; |
| 576 | else |
| 577 | memcpy(rev, drv->rev, REV_LEN + 1); |
| 578 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 579 | |
| 580 | if (ret) |
| 581 | return ret; |
| 582 | else |
| 583 | return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev); |
| 584 | } |
| 585 | static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); |
| 586 | |
| 587 | static ssize_t cciss_show_lunid(struct device *dev, |
| 588 | struct device_attribute *attr, char *buf) |
| 589 | { |
| 590 | drive_info_struct *drv = to_drv(dev); |
| 591 | struct ctlr_info *h = to_hba(drv->dev.parent); |
| 592 | unsigned long flags; |
| 593 | unsigned char lunid[8]; |
| 594 | |
| 595 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 596 | if (h->busy_configuring) { |
| 597 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 598 | return -EBUSY; |
| 599 | } |
| 600 | if (!drv->heads) { |
| 601 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 602 | return -ENOTTY; |
| 603 | } |
| 604 | memcpy(lunid, drv->LunID, sizeof(lunid)); |
| 605 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 606 | return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", |
| 607 | lunid[0], lunid[1], lunid[2], lunid[3], |
| 608 | lunid[4], lunid[5], lunid[6], lunid[7]); |
| 609 | } |
| 610 | static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); |
| 611 | |
| 612 | static ssize_t cciss_show_raid_level(struct device *dev, |
| 613 | struct device_attribute *attr, char *buf) |
| 614 | { |
| 615 | drive_info_struct *drv = to_drv(dev); |
| 616 | struct ctlr_info *h = to_hba(drv->dev.parent); |
| 617 | int raid; |
| 618 | unsigned long flags; |
| 619 | |
| 620 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 621 | if (h->busy_configuring) { |
| 622 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 623 | return -EBUSY; |
| 624 | } |
| 625 | raid = drv->raid_level; |
| 626 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 627 | if (raid < 0 || raid > RAID_UNKNOWN) |
| 628 | raid = RAID_UNKNOWN; |
| 629 | |
| 630 | return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n", |
| 631 | raid_label[raid]); |
| 632 | } |
| 633 | static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL); |
| 634 | |
| 635 | static ssize_t cciss_show_usage_count(struct device *dev, |
| 636 | struct device_attribute *attr, char *buf) |
| 637 | { |
| 638 | drive_info_struct *drv = to_drv(dev); |
| 639 | struct ctlr_info *h = to_hba(drv->dev.parent); |
| 640 | unsigned long flags; |
| 641 | int count; |
| 642 | |
| 643 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 644 | if (h->busy_configuring) { |
| 645 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 646 | return -EBUSY; |
| 647 | } |
| 648 | count = drv->usage_count; |
| 649 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 650 | return snprintf(buf, 20, "%d\n", count); |
| 651 | } |
| 652 | static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); |
| 653 | |
| 654 | static struct attribute *cciss_host_attrs[] = { |
| 655 | &dev_attr_rescan.attr, |
| 656 | NULL |
| 657 | }; |
| 658 | |
| 659 | static struct attribute_group cciss_host_attr_group = { |
| 660 | .attrs = cciss_host_attrs, |
| 661 | }; |
| 662 | |
| 663 | static const struct attribute_group *cciss_host_attr_groups[] = { |
| 664 | &cciss_host_attr_group, |
| 665 | NULL |
| 666 | }; |
| 667 | |
| 668 | static struct device_type cciss_host_type = { |
| 669 | .name = "cciss_host", |
| 670 | .groups = cciss_host_attr_groups, |
| 671 | .release = cciss_hba_release, |
| 672 | }; |
| 673 | |
| 674 | static struct attribute *cciss_dev_attrs[] = { |
| 675 | &dev_attr_unique_id.attr, |
| 676 | &dev_attr_model.attr, |
| 677 | &dev_attr_vendor.attr, |
| 678 | &dev_attr_rev.attr, |
| 679 | &dev_attr_lunid.attr, |
| 680 | &dev_attr_raid_level.attr, |
| 681 | &dev_attr_usage_count.attr, |
| 682 | NULL |
| 683 | }; |
| 684 | |
| 685 | static struct attribute_group cciss_dev_attr_group = { |
| 686 | .attrs = cciss_dev_attrs, |
| 687 | }; |
| 688 | |
| 689 | static const struct attribute_group *cciss_dev_attr_groups[] = { |
| 690 | &cciss_dev_attr_group, |
| 691 | NULL |
| 692 | }; |
| 693 | |
| 694 | static struct device_type cciss_dev_type = { |
| 695 | .name = "cciss_device", |
| 696 | .groups = cciss_dev_attr_groups, |
| 697 | .release = cciss_device_release, |
| 698 | }; |
| 699 | |
| 700 | static struct bus_type cciss_bus_type = { |
| 701 | .name = "cciss", |
| 702 | }; |
| 703 | |
| 704 | /* |
| 705 | * cciss_hba_release is called when the reference count |
| 706 | * of h->dev goes to zero. |
| 707 | */ |
| 708 | static void cciss_hba_release(struct device *dev) |
| 709 | { |
| 710 | /* |
| 711 | * nothing to do, but need this to avoid a warning |
| 712 | * about not having a release handler from lib/kref.c. |
| 713 | */ |
| 714 | } |
| 715 | |
| 716 | /* |
| 717 | * Initialize sysfs entry for each controller. This sets up and registers |
| 718 | * the 'cciss#' directory for each individual controller under |
| 719 | * /sys/bus/pci/devices/<dev>/. |
| 720 | */ |
| 721 | static int cciss_create_hba_sysfs_entry(struct ctlr_info *h) |
| 722 | { |
| 723 | device_initialize(&h->dev); |
| 724 | h->dev.type = &cciss_host_type; |
| 725 | h->dev.bus = &cciss_bus_type; |
| 726 | dev_set_name(&h->dev, "%s", h->devname); |
| 727 | h->dev.parent = &h->pdev->dev; |
| 728 | |
| 729 | return device_add(&h->dev); |
| 730 | } |
| 731 | |
| 732 | /* |
| 733 | * Remove sysfs entries for an hba. |
| 734 | */ |
| 735 | static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h) |
| 736 | { |
| 737 | device_del(&h->dev); |
| 738 | put_device(&h->dev); /* final put. */ |
| 739 | } |
| 740 | |
| 741 | /* cciss_device_release is called when the reference count |
| 742 | * of h->drv[x]dev goes to zero. |
| 743 | */ |
| 744 | static void cciss_device_release(struct device *dev) |
| 745 | { |
| 746 | drive_info_struct *drv = to_drv(dev); |
| 747 | kfree(drv); |
| 748 | } |
| 749 | |
| 750 | /* |
| 751 | * Initialize sysfs for each logical drive. This sets up and registers |
| 752 | * the 'c#d#' directory for each individual logical drive under |
| 753 | * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from |
| 754 | * /sys/block/cciss!c#d# to this entry. |
| 755 | */ |
| 756 | static long cciss_create_ld_sysfs_entry(struct ctlr_info *h, |
| 757 | int drv_index) |
| 758 | { |
| 759 | struct device *dev; |
| 760 | |
| 761 | if (h->drv[drv_index]->device_initialized) |
| 762 | return 0; |
| 763 | |
| 764 | dev = &h->drv[drv_index]->dev; |
| 765 | device_initialize(dev); |
| 766 | dev->type = &cciss_dev_type; |
| 767 | dev->bus = &cciss_bus_type; |
| 768 | dev_set_name(dev, "c%dd%d", h->ctlr, drv_index); |
| 769 | dev->parent = &h->dev; |
| 770 | h->drv[drv_index]->device_initialized = 1; |
| 771 | return device_add(dev); |
| 772 | } |
| 773 | |
| 774 | /* |
| 775 | * Remove sysfs entries for a logical drive. |
| 776 | */ |
| 777 | static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index, |
| 778 | int ctlr_exiting) |
| 779 | { |
| 780 | struct device *dev = &h->drv[drv_index]->dev; |
| 781 | |
| 782 | /* special case for c*d0, we only destroy it on controller exit */ |
| 783 | if (drv_index == 0 && !ctlr_exiting) |
| 784 | return; |
| 785 | |
| 786 | device_del(dev); |
| 787 | put_device(dev); /* the "final" put. */ |
| 788 | h->drv[drv_index] = NULL; |
| 789 | } |
| 790 | |
| 791 | /* |
| 792 | * For operations that cannot sleep, a command block is allocated at init, |
| 793 | * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track |
| 794 | * which ones are free or in use. For operations that can wait for kmalloc |
| 795 | * to possible sleep, this routine can be called with get_from_pool set to 0. |
| 796 | * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was. |
| 797 | */ |
| 798 | static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool) |
| 799 | { |
| 800 | CommandList_struct *c; |
| 801 | int i; |
| 802 | u64bit temp64; |
| 803 | dma_addr_t cmd_dma_handle, err_dma_handle; |
| 804 | |
| 805 | if (!get_from_pool) { |
| 806 | c = (CommandList_struct *) pci_alloc_consistent(h->pdev, |
| 807 | sizeof(CommandList_struct), &cmd_dma_handle); |
| 808 | if (c == NULL) |
| 809 | return NULL; |
| 810 | memset(c, 0, sizeof(CommandList_struct)); |
| 811 | |
| 812 | c->cmdindex = -1; |
| 813 | |
| 814 | c->err_info = (ErrorInfo_struct *) |
| 815 | pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct), |
| 816 | &err_dma_handle); |
| 817 | |
| 818 | if (c->err_info == NULL) { |
| 819 | pci_free_consistent(h->pdev, |
| 820 | sizeof(CommandList_struct), c, cmd_dma_handle); |
| 821 | return NULL; |
| 822 | } |
| 823 | memset(c->err_info, 0, sizeof(ErrorInfo_struct)); |
| 824 | } else { /* get it out of the controllers pool */ |
| 825 | |
| 826 | do { |
| 827 | i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); |
| 828 | if (i == h->nr_cmds) |
| 829 | return NULL; |
| 830 | } while (test_and_set_bit |
| 831 | (i & (BITS_PER_LONG - 1), |
| 832 | h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); |
| 833 | #ifdef CCISS_DEBUG |
| 834 | printk(KERN_DEBUG "cciss: using command buffer %d\n", i); |
| 835 | #endif |
| 836 | c = h->cmd_pool + i; |
| 837 | memset(c, 0, sizeof(CommandList_struct)); |
| 838 | cmd_dma_handle = h->cmd_pool_dhandle |
| 839 | + i * sizeof(CommandList_struct); |
| 840 | c->err_info = h->errinfo_pool + i; |
| 841 | memset(c->err_info, 0, sizeof(ErrorInfo_struct)); |
| 842 | err_dma_handle = h->errinfo_pool_dhandle |
| 843 | + i * sizeof(ErrorInfo_struct); |
| 844 | h->nr_allocs++; |
| 845 | |
| 846 | c->cmdindex = i; |
| 847 | } |
| 848 | |
| 849 | INIT_HLIST_NODE(&c->list); |
| 850 | c->busaddr = (__u32) cmd_dma_handle; |
| 851 | temp64.val = (__u64) err_dma_handle; |
| 852 | c->ErrDesc.Addr.lower = temp64.val32.lower; |
| 853 | c->ErrDesc.Addr.upper = temp64.val32.upper; |
| 854 | c->ErrDesc.Len = sizeof(ErrorInfo_struct); |
| 855 | |
| 856 | c->ctlr = h->ctlr; |
| 857 | return c; |
| 858 | } |
| 859 | |
| 860 | /* |
| 861 | * Frees a command block that was previously allocated with cmd_alloc(). |
| 862 | */ |
| 863 | static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool) |
| 864 | { |
| 865 | int i; |
| 866 | u64bit temp64; |
| 867 | |
| 868 | if (!got_from_pool) { |
| 869 | temp64.val32.lower = c->ErrDesc.Addr.lower; |
| 870 | temp64.val32.upper = c->ErrDesc.Addr.upper; |
| 871 | pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct), |
| 872 | c->err_info, (dma_addr_t) temp64.val); |
| 873 | pci_free_consistent(h->pdev, sizeof(CommandList_struct), |
| 874 | c, (dma_addr_t) c->busaddr); |
| 875 | } else { |
| 876 | i = c - h->cmd_pool; |
| 877 | clear_bit(i & (BITS_PER_LONG - 1), |
| 878 | h->cmd_pool_bits + (i / BITS_PER_LONG)); |
| 879 | h->nr_frees++; |
| 880 | } |
| 881 | } |
| 882 | |
| 883 | static inline ctlr_info_t *get_host(struct gendisk *disk) |
| 884 | { |
| 885 | return disk->queue->queuedata; |
| 886 | } |
| 887 | |
| 888 | static inline drive_info_struct *get_drv(struct gendisk *disk) |
| 889 | { |
| 890 | return disk->private_data; |
| 891 | } |
| 892 | |
| 893 | /* |
| 894 | * Open. Make sure the device is really there. |
| 895 | */ |
| 896 | static int cciss_open(struct block_device *bdev, fmode_t mode) |
| 897 | { |
| 898 | ctlr_info_t *host = get_host(bdev->bd_disk); |
| 899 | drive_info_struct *drv = get_drv(bdev->bd_disk); |
| 900 | |
| 901 | #ifdef CCISS_DEBUG |
| 902 | printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name); |
| 903 | #endif /* CCISS_DEBUG */ |
| 904 | |
| 905 | if (drv->busy_configuring) |
| 906 | return -EBUSY; |
| 907 | /* |
| 908 | * Root is allowed to open raw volume zero even if it's not configured |
| 909 | * so array config can still work. Root is also allowed to open any |
| 910 | * volume that has a LUN ID, so it can issue IOCTL to reread the |
| 911 | * disk information. I don't think I really like this |
| 912 | * but I'm already using way to many device nodes to claim another one |
| 913 | * for "raw controller". |
| 914 | */ |
| 915 | if (drv->heads == 0) { |
| 916 | if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */ |
| 917 | /* if not node 0 make sure it is a partition = 0 */ |
| 918 | if (MINOR(bdev->bd_dev) & 0x0f) { |
| 919 | return -ENXIO; |
| 920 | /* if it is, make sure we have a LUN ID */ |
| 921 | } else if (memcmp(drv->LunID, CTLR_LUNID, |
| 922 | sizeof(drv->LunID))) { |
| 923 | return -ENXIO; |
| 924 | } |
| 925 | } |
| 926 | if (!capable(CAP_SYS_ADMIN)) |
| 927 | return -EPERM; |
| 928 | } |
| 929 | drv->usage_count++; |
| 930 | host->usage_count++; |
| 931 | return 0; |
| 932 | } |
| 933 | |
| 934 | /* |
| 935 | * Close. Sync first. |
| 936 | */ |
| 937 | static int cciss_release(struct gendisk *disk, fmode_t mode) |
| 938 | { |
| 939 | ctlr_info_t *host = get_host(disk); |
| 940 | drive_info_struct *drv = get_drv(disk); |
| 941 | |
| 942 | #ifdef CCISS_DEBUG |
| 943 | printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name); |
| 944 | #endif /* CCISS_DEBUG */ |
| 945 | |
| 946 | drv->usage_count--; |
| 947 | host->usage_count--; |
| 948 | return 0; |
| 949 | } |
| 950 | |
| 951 | #ifdef CONFIG_COMPAT |
| 952 | |
| 953 | static int do_ioctl(struct block_device *bdev, fmode_t mode, |
| 954 | unsigned cmd, unsigned long arg) |
| 955 | { |
| 956 | int ret; |
| 957 | lock_kernel(); |
| 958 | ret = cciss_ioctl(bdev, mode, cmd, arg); |
| 959 | unlock_kernel(); |
| 960 | return ret; |
| 961 | } |
| 962 | |
| 963 | static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, |
| 964 | unsigned cmd, unsigned long arg); |
| 965 | static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, |
| 966 | unsigned cmd, unsigned long arg); |
| 967 | |
| 968 | static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode, |
| 969 | unsigned cmd, unsigned long arg) |
| 970 | { |
| 971 | switch (cmd) { |
| 972 | case CCISS_GETPCIINFO: |
| 973 | case CCISS_GETINTINFO: |
| 974 | case CCISS_SETINTINFO: |
| 975 | case CCISS_GETNODENAME: |
| 976 | case CCISS_SETNODENAME: |
| 977 | case CCISS_GETHEARTBEAT: |
| 978 | case CCISS_GETBUSTYPES: |
| 979 | case CCISS_GETFIRMVER: |
| 980 | case CCISS_GETDRIVVER: |
| 981 | case CCISS_REVALIDVOLS: |
| 982 | case CCISS_DEREGDISK: |
| 983 | case CCISS_REGNEWDISK: |
| 984 | case CCISS_REGNEWD: |
| 985 | case CCISS_RESCANDISK: |
| 986 | case CCISS_GETLUNINFO: |
| 987 | return do_ioctl(bdev, mode, cmd, arg); |
| 988 | |
| 989 | case CCISS_PASSTHRU32: |
| 990 | return cciss_ioctl32_passthru(bdev, mode, cmd, arg); |
| 991 | case CCISS_BIG_PASSTHRU32: |
| 992 | return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg); |
| 993 | |
| 994 | default: |
| 995 | return -ENOIOCTLCMD; |
| 996 | } |
| 997 | } |
| 998 | |
| 999 | static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, |
| 1000 | unsigned cmd, unsigned long arg) |
| 1001 | { |
| 1002 | IOCTL32_Command_struct __user *arg32 = |
| 1003 | (IOCTL32_Command_struct __user *) arg; |
| 1004 | IOCTL_Command_struct arg64; |
| 1005 | IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); |
| 1006 | int err; |
| 1007 | u32 cp; |
| 1008 | |
| 1009 | err = 0; |
| 1010 | err |= |
| 1011 | copy_from_user(&arg64.LUN_info, &arg32->LUN_info, |
| 1012 | sizeof(arg64.LUN_info)); |
| 1013 | err |= |
| 1014 | copy_from_user(&arg64.Request, &arg32->Request, |
| 1015 | sizeof(arg64.Request)); |
| 1016 | err |= |
| 1017 | copy_from_user(&arg64.error_info, &arg32->error_info, |
| 1018 | sizeof(arg64.error_info)); |
| 1019 | err |= get_user(arg64.buf_size, &arg32->buf_size); |
| 1020 | err |= get_user(cp, &arg32->buf); |
| 1021 | arg64.buf = compat_ptr(cp); |
| 1022 | err |= copy_to_user(p, &arg64, sizeof(arg64)); |
| 1023 | |
| 1024 | if (err) |
| 1025 | return -EFAULT; |
| 1026 | |
| 1027 | err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p); |
| 1028 | if (err) |
| 1029 | return err; |
| 1030 | err |= |
| 1031 | copy_in_user(&arg32->error_info, &p->error_info, |
| 1032 | sizeof(arg32->error_info)); |
| 1033 | if (err) |
| 1034 | return -EFAULT; |
| 1035 | return err; |
| 1036 | } |
| 1037 | |
| 1038 | static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, |
| 1039 | unsigned cmd, unsigned long arg) |
| 1040 | { |
| 1041 | BIG_IOCTL32_Command_struct __user *arg32 = |
| 1042 | (BIG_IOCTL32_Command_struct __user *) arg; |
| 1043 | BIG_IOCTL_Command_struct arg64; |
| 1044 | BIG_IOCTL_Command_struct __user *p = |
| 1045 | compat_alloc_user_space(sizeof(arg64)); |
| 1046 | int err; |
| 1047 | u32 cp; |
| 1048 | |
| 1049 | err = 0; |
| 1050 | err |= |
| 1051 | copy_from_user(&arg64.LUN_info, &arg32->LUN_info, |
| 1052 | sizeof(arg64.LUN_info)); |
| 1053 | err |= |
| 1054 | copy_from_user(&arg64.Request, &arg32->Request, |
| 1055 | sizeof(arg64.Request)); |
| 1056 | err |= |
| 1057 | copy_from_user(&arg64.error_info, &arg32->error_info, |
| 1058 | sizeof(arg64.error_info)); |
| 1059 | err |= get_user(arg64.buf_size, &arg32->buf_size); |
| 1060 | err |= get_user(arg64.malloc_size, &arg32->malloc_size); |
| 1061 | err |= get_user(cp, &arg32->buf); |
| 1062 | arg64.buf = compat_ptr(cp); |
| 1063 | err |= copy_to_user(p, &arg64, sizeof(arg64)); |
| 1064 | |
| 1065 | if (err) |
| 1066 | return -EFAULT; |
| 1067 | |
| 1068 | err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p); |
| 1069 | if (err) |
| 1070 | return err; |
| 1071 | err |= |
| 1072 | copy_in_user(&arg32->error_info, &p->error_info, |
| 1073 | sizeof(arg32->error_info)); |
| 1074 | if (err) |
| 1075 | return -EFAULT; |
| 1076 | return err; |
| 1077 | } |
| 1078 | #endif |
| 1079 | |
| 1080 | static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| 1081 | { |
| 1082 | drive_info_struct *drv = get_drv(bdev->bd_disk); |
| 1083 | |
| 1084 | if (!drv->cylinders) |
| 1085 | return -ENXIO; |
| 1086 | |
| 1087 | geo->heads = drv->heads; |
| 1088 | geo->sectors = drv->sectors; |
| 1089 | geo->cylinders = drv->cylinders; |
| 1090 | return 0; |
| 1091 | } |
| 1092 | |
| 1093 | static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c) |
| 1094 | { |
| 1095 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && |
| 1096 | c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) |
| 1097 | (void)check_for_unit_attention(host, c); |
| 1098 | } |
| 1099 | /* |
| 1100 | * ioctl |
| 1101 | */ |
| 1102 | static int cciss_ioctl(struct block_device *bdev, fmode_t mode, |
| 1103 | unsigned int cmd, unsigned long arg) |
| 1104 | { |
| 1105 | struct gendisk *disk = bdev->bd_disk; |
| 1106 | ctlr_info_t *host = get_host(disk); |
| 1107 | drive_info_struct *drv = get_drv(disk); |
| 1108 | int ctlr = host->ctlr; |
| 1109 | void __user *argp = (void __user *)arg; |
| 1110 | |
| 1111 | #ifdef CCISS_DEBUG |
| 1112 | printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg); |
| 1113 | #endif /* CCISS_DEBUG */ |
| 1114 | |
| 1115 | switch (cmd) { |
| 1116 | case CCISS_GETPCIINFO: |
| 1117 | { |
| 1118 | cciss_pci_info_struct pciinfo; |
| 1119 | |
| 1120 | if (!arg) |
| 1121 | return -EINVAL; |
| 1122 | pciinfo.domain = pci_domain_nr(host->pdev->bus); |
| 1123 | pciinfo.bus = host->pdev->bus->number; |
| 1124 | pciinfo.dev_fn = host->pdev->devfn; |
| 1125 | pciinfo.board_id = host->board_id; |
| 1126 | if (copy_to_user |
| 1127 | (argp, &pciinfo, sizeof(cciss_pci_info_struct))) |
| 1128 | return -EFAULT; |
| 1129 | return 0; |
| 1130 | } |
| 1131 | case CCISS_GETINTINFO: |
| 1132 | { |
| 1133 | cciss_coalint_struct intinfo; |
| 1134 | if (!arg) |
| 1135 | return -EINVAL; |
| 1136 | intinfo.delay = |
| 1137 | readl(&host->cfgtable->HostWrite.CoalIntDelay); |
| 1138 | intinfo.count = |
| 1139 | readl(&host->cfgtable->HostWrite.CoalIntCount); |
| 1140 | if (copy_to_user |
| 1141 | (argp, &intinfo, sizeof(cciss_coalint_struct))) |
| 1142 | return -EFAULT; |
| 1143 | return 0; |
| 1144 | } |
| 1145 | case CCISS_SETINTINFO: |
| 1146 | { |
| 1147 | cciss_coalint_struct intinfo; |
| 1148 | unsigned long flags; |
| 1149 | int i; |
| 1150 | |
| 1151 | if (!arg) |
| 1152 | return -EINVAL; |
| 1153 | if (!capable(CAP_SYS_ADMIN)) |
| 1154 | return -EPERM; |
| 1155 | if (copy_from_user |
| 1156 | (&intinfo, argp, sizeof(cciss_coalint_struct))) |
| 1157 | return -EFAULT; |
| 1158 | if ((intinfo.delay == 0) && (intinfo.count == 0)) |
| 1159 | { |
| 1160 | // printk("cciss_ioctl: delay and count cannot be 0\n"); |
| 1161 | return -EINVAL; |
| 1162 | } |
| 1163 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1164 | /* Update the field, and then ring the doorbell */ |
| 1165 | writel(intinfo.delay, |
| 1166 | &(host->cfgtable->HostWrite.CoalIntDelay)); |
| 1167 | writel(intinfo.count, |
| 1168 | &(host->cfgtable->HostWrite.CoalIntCount)); |
| 1169 | writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); |
| 1170 | |
| 1171 | for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { |
| 1172 | if (!(readl(host->vaddr + SA5_DOORBELL) |
| 1173 | & CFGTBL_ChangeReq)) |
| 1174 | break; |
| 1175 | /* delay and try again */ |
| 1176 | udelay(1000); |
| 1177 | } |
| 1178 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1179 | if (i >= MAX_IOCTL_CONFIG_WAIT) |
| 1180 | return -EAGAIN; |
| 1181 | return 0; |
| 1182 | } |
| 1183 | case CCISS_GETNODENAME: |
| 1184 | { |
| 1185 | NodeName_type NodeName; |
| 1186 | int i; |
| 1187 | |
| 1188 | if (!arg) |
| 1189 | return -EINVAL; |
| 1190 | for (i = 0; i < 16; i++) |
| 1191 | NodeName[i] = |
| 1192 | readb(&host->cfgtable->ServerName[i]); |
| 1193 | if (copy_to_user(argp, NodeName, sizeof(NodeName_type))) |
| 1194 | return -EFAULT; |
| 1195 | return 0; |
| 1196 | } |
| 1197 | case CCISS_SETNODENAME: |
| 1198 | { |
| 1199 | NodeName_type NodeName; |
| 1200 | unsigned long flags; |
| 1201 | int i; |
| 1202 | |
| 1203 | if (!arg) |
| 1204 | return -EINVAL; |
| 1205 | if (!capable(CAP_SYS_ADMIN)) |
| 1206 | return -EPERM; |
| 1207 | |
| 1208 | if (copy_from_user |
| 1209 | (NodeName, argp, sizeof(NodeName_type))) |
| 1210 | return -EFAULT; |
| 1211 | |
| 1212 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1213 | |
| 1214 | /* Update the field, and then ring the doorbell */ |
| 1215 | for (i = 0; i < 16; i++) |
| 1216 | writeb(NodeName[i], |
| 1217 | &host->cfgtable->ServerName[i]); |
| 1218 | |
| 1219 | writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL); |
| 1220 | |
| 1221 | for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { |
| 1222 | if (!(readl(host->vaddr + SA5_DOORBELL) |
| 1223 | & CFGTBL_ChangeReq)) |
| 1224 | break; |
| 1225 | /* delay and try again */ |
| 1226 | udelay(1000); |
| 1227 | } |
| 1228 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1229 | if (i >= MAX_IOCTL_CONFIG_WAIT) |
| 1230 | return -EAGAIN; |
| 1231 | return 0; |
| 1232 | } |
| 1233 | |
| 1234 | case CCISS_GETHEARTBEAT: |
| 1235 | { |
| 1236 | Heartbeat_type heartbeat; |
| 1237 | |
| 1238 | if (!arg) |
| 1239 | return -EINVAL; |
| 1240 | heartbeat = readl(&host->cfgtable->HeartBeat); |
| 1241 | if (copy_to_user |
| 1242 | (argp, &heartbeat, sizeof(Heartbeat_type))) |
| 1243 | return -EFAULT; |
| 1244 | return 0; |
| 1245 | } |
| 1246 | case CCISS_GETBUSTYPES: |
| 1247 | { |
| 1248 | BusTypes_type BusTypes; |
| 1249 | |
| 1250 | if (!arg) |
| 1251 | return -EINVAL; |
| 1252 | BusTypes = readl(&host->cfgtable->BusTypes); |
| 1253 | if (copy_to_user |
| 1254 | (argp, &BusTypes, sizeof(BusTypes_type))) |
| 1255 | return -EFAULT; |
| 1256 | return 0; |
| 1257 | } |
| 1258 | case CCISS_GETFIRMVER: |
| 1259 | { |
| 1260 | FirmwareVer_type firmware; |
| 1261 | |
| 1262 | if (!arg) |
| 1263 | return -EINVAL; |
| 1264 | memcpy(firmware, host->firm_ver, 4); |
| 1265 | |
| 1266 | if (copy_to_user |
| 1267 | (argp, firmware, sizeof(FirmwareVer_type))) |
| 1268 | return -EFAULT; |
| 1269 | return 0; |
| 1270 | } |
| 1271 | case CCISS_GETDRIVVER: |
| 1272 | { |
| 1273 | DriverVer_type DriverVer = DRIVER_VERSION; |
| 1274 | |
| 1275 | if (!arg) |
| 1276 | return -EINVAL; |
| 1277 | |
| 1278 | if (copy_to_user |
| 1279 | (argp, &DriverVer, sizeof(DriverVer_type))) |
| 1280 | return -EFAULT; |
| 1281 | return 0; |
| 1282 | } |
| 1283 | |
| 1284 | case CCISS_DEREGDISK: |
| 1285 | case CCISS_REGNEWD: |
| 1286 | case CCISS_REVALIDVOLS: |
| 1287 | return rebuild_lun_table(host, 0, 1); |
| 1288 | |
| 1289 | case CCISS_GETLUNINFO:{ |
| 1290 | LogvolInfo_struct luninfo; |
| 1291 | |
| 1292 | memcpy(&luninfo.LunID, drv->LunID, |
| 1293 | sizeof(luninfo.LunID)); |
| 1294 | luninfo.num_opens = drv->usage_count; |
| 1295 | luninfo.num_parts = 0; |
| 1296 | if (copy_to_user(argp, &luninfo, |
| 1297 | sizeof(LogvolInfo_struct))) |
| 1298 | return -EFAULT; |
| 1299 | return 0; |
| 1300 | } |
| 1301 | case CCISS_PASSTHRU: |
| 1302 | { |
| 1303 | IOCTL_Command_struct iocommand; |
| 1304 | CommandList_struct *c; |
| 1305 | char *buff = NULL; |
| 1306 | u64bit temp64; |
| 1307 | unsigned long flags; |
| 1308 | DECLARE_COMPLETION_ONSTACK(wait); |
| 1309 | |
| 1310 | if (!arg) |
| 1311 | return -EINVAL; |
| 1312 | |
| 1313 | if (!capable(CAP_SYS_RAWIO)) |
| 1314 | return -EPERM; |
| 1315 | |
| 1316 | if (copy_from_user |
| 1317 | (&iocommand, argp, sizeof(IOCTL_Command_struct))) |
| 1318 | return -EFAULT; |
| 1319 | if ((iocommand.buf_size < 1) && |
| 1320 | (iocommand.Request.Type.Direction != XFER_NONE)) { |
| 1321 | return -EINVAL; |
| 1322 | } |
| 1323 | #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */ |
| 1324 | /* Check kmalloc limits */ |
| 1325 | if (iocommand.buf_size > 128000) |
| 1326 | return -EINVAL; |
| 1327 | #endif |
| 1328 | if (iocommand.buf_size > 0) { |
| 1329 | buff = kmalloc(iocommand.buf_size, GFP_KERNEL); |
| 1330 | if (buff == NULL) |
| 1331 | return -EFAULT; |
| 1332 | } |
| 1333 | if (iocommand.Request.Type.Direction == XFER_WRITE) { |
| 1334 | /* Copy the data into the buffer we created */ |
| 1335 | if (copy_from_user |
| 1336 | (buff, iocommand.buf, iocommand.buf_size)) { |
| 1337 | kfree(buff); |
| 1338 | return -EFAULT; |
| 1339 | } |
| 1340 | } else { |
| 1341 | memset(buff, 0, iocommand.buf_size); |
| 1342 | } |
| 1343 | if ((c = cmd_alloc(host, 0)) == NULL) { |
| 1344 | kfree(buff); |
| 1345 | return -ENOMEM; |
| 1346 | } |
| 1347 | /* Fill in the command type */ |
| 1348 | c->cmd_type = CMD_IOCTL_PEND; |
| 1349 | /* Fill in Command Header */ |
| 1350 | c->Header.ReplyQueue = 0; /* unused in simple mode */ |
| 1351 | if (iocommand.buf_size > 0) /* buffer to fill */ |
| 1352 | { |
| 1353 | c->Header.SGList = 1; |
| 1354 | c->Header.SGTotal = 1; |
| 1355 | } else /* no buffers to fill */ |
| 1356 | { |
| 1357 | c->Header.SGList = 0; |
| 1358 | c->Header.SGTotal = 0; |
| 1359 | } |
| 1360 | c->Header.LUN = iocommand.LUN_info; |
| 1361 | /* use the kernel address the cmd block for tag */ |
| 1362 | c->Header.Tag.lower = c->busaddr; |
| 1363 | |
| 1364 | /* Fill in Request block */ |
| 1365 | c->Request = iocommand.Request; |
| 1366 | |
| 1367 | /* Fill in the scatter gather information */ |
| 1368 | if (iocommand.buf_size > 0) { |
| 1369 | temp64.val = pci_map_single(host->pdev, buff, |
| 1370 | iocommand.buf_size, |
| 1371 | PCI_DMA_BIDIRECTIONAL); |
| 1372 | c->SG[0].Addr.lower = temp64.val32.lower; |
| 1373 | c->SG[0].Addr.upper = temp64.val32.upper; |
| 1374 | c->SG[0].Len = iocommand.buf_size; |
| 1375 | c->SG[0].Ext = 0; /* we are not chaining */ |
| 1376 | } |
| 1377 | c->waiting = &wait; |
| 1378 | |
| 1379 | /* Put the request on the tail of the request queue */ |
| 1380 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1381 | addQ(&host->reqQ, c); |
| 1382 | host->Qdepth++; |
| 1383 | start_io(host); |
| 1384 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1385 | |
| 1386 | wait_for_completion(&wait); |
| 1387 | |
| 1388 | /* unlock the buffers from DMA */ |
| 1389 | temp64.val32.lower = c->SG[0].Addr.lower; |
| 1390 | temp64.val32.upper = c->SG[0].Addr.upper; |
| 1391 | pci_unmap_single(host->pdev, (dma_addr_t) temp64.val, |
| 1392 | iocommand.buf_size, |
| 1393 | PCI_DMA_BIDIRECTIONAL); |
| 1394 | |
| 1395 | check_ioctl_unit_attention(host, c); |
| 1396 | |
| 1397 | /* Copy the error information out */ |
| 1398 | iocommand.error_info = *(c->err_info); |
| 1399 | if (copy_to_user |
| 1400 | (argp, &iocommand, sizeof(IOCTL_Command_struct))) { |
| 1401 | kfree(buff); |
| 1402 | cmd_free(host, c, 0); |
| 1403 | return -EFAULT; |
| 1404 | } |
| 1405 | |
| 1406 | if (iocommand.Request.Type.Direction == XFER_READ) { |
| 1407 | /* Copy the data out of the buffer we created */ |
| 1408 | if (copy_to_user |
| 1409 | (iocommand.buf, buff, iocommand.buf_size)) { |
| 1410 | kfree(buff); |
| 1411 | cmd_free(host, c, 0); |
| 1412 | return -EFAULT; |
| 1413 | } |
| 1414 | } |
| 1415 | kfree(buff); |
| 1416 | cmd_free(host, c, 0); |
| 1417 | return 0; |
| 1418 | } |
| 1419 | case CCISS_BIG_PASSTHRU:{ |
| 1420 | BIG_IOCTL_Command_struct *ioc; |
| 1421 | CommandList_struct *c; |
| 1422 | unsigned char **buff = NULL; |
| 1423 | int *buff_size = NULL; |
| 1424 | u64bit temp64; |
| 1425 | unsigned long flags; |
| 1426 | BYTE sg_used = 0; |
| 1427 | int status = 0; |
| 1428 | int i; |
| 1429 | DECLARE_COMPLETION_ONSTACK(wait); |
| 1430 | __u32 left; |
| 1431 | __u32 sz; |
| 1432 | BYTE __user *data_ptr; |
| 1433 | |
| 1434 | if (!arg) |
| 1435 | return -EINVAL; |
| 1436 | if (!capable(CAP_SYS_RAWIO)) |
| 1437 | return -EPERM; |
| 1438 | ioc = (BIG_IOCTL_Command_struct *) |
| 1439 | kmalloc(sizeof(*ioc), GFP_KERNEL); |
| 1440 | if (!ioc) { |
| 1441 | status = -ENOMEM; |
| 1442 | goto cleanup1; |
| 1443 | } |
| 1444 | if (copy_from_user(ioc, argp, sizeof(*ioc))) { |
| 1445 | status = -EFAULT; |
| 1446 | goto cleanup1; |
| 1447 | } |
| 1448 | if ((ioc->buf_size < 1) && |
| 1449 | (ioc->Request.Type.Direction != XFER_NONE)) { |
| 1450 | status = -EINVAL; |
| 1451 | goto cleanup1; |
| 1452 | } |
| 1453 | /* Check kmalloc limits using all SGs */ |
| 1454 | if (ioc->malloc_size > MAX_KMALLOC_SIZE) { |
| 1455 | status = -EINVAL; |
| 1456 | goto cleanup1; |
| 1457 | } |
| 1458 | if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { |
| 1459 | status = -EINVAL; |
| 1460 | goto cleanup1; |
| 1461 | } |
| 1462 | buff = |
| 1463 | kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); |
| 1464 | if (!buff) { |
| 1465 | status = -ENOMEM; |
| 1466 | goto cleanup1; |
| 1467 | } |
| 1468 | buff_size = kmalloc(MAXSGENTRIES * sizeof(int), |
| 1469 | GFP_KERNEL); |
| 1470 | if (!buff_size) { |
| 1471 | status = -ENOMEM; |
| 1472 | goto cleanup1; |
| 1473 | } |
| 1474 | left = ioc->buf_size; |
| 1475 | data_ptr = ioc->buf; |
| 1476 | while (left) { |
| 1477 | sz = (left > |
| 1478 | ioc->malloc_size) ? ioc-> |
| 1479 | malloc_size : left; |
| 1480 | buff_size[sg_used] = sz; |
| 1481 | buff[sg_used] = kmalloc(sz, GFP_KERNEL); |
| 1482 | if (buff[sg_used] == NULL) { |
| 1483 | status = -ENOMEM; |
| 1484 | goto cleanup1; |
| 1485 | } |
| 1486 | if (ioc->Request.Type.Direction == XFER_WRITE) { |
| 1487 | if (copy_from_user |
| 1488 | (buff[sg_used], data_ptr, sz)) { |
| 1489 | status = -EFAULT; |
| 1490 | goto cleanup1; |
| 1491 | } |
| 1492 | } else { |
| 1493 | memset(buff[sg_used], 0, sz); |
| 1494 | } |
| 1495 | left -= sz; |
| 1496 | data_ptr += sz; |
| 1497 | sg_used++; |
| 1498 | } |
| 1499 | if ((c = cmd_alloc(host, 0)) == NULL) { |
| 1500 | status = -ENOMEM; |
| 1501 | goto cleanup1; |
| 1502 | } |
| 1503 | c->cmd_type = CMD_IOCTL_PEND; |
| 1504 | c->Header.ReplyQueue = 0; |
| 1505 | |
| 1506 | if (ioc->buf_size > 0) { |
| 1507 | c->Header.SGList = sg_used; |
| 1508 | c->Header.SGTotal = sg_used; |
| 1509 | } else { |
| 1510 | c->Header.SGList = 0; |
| 1511 | c->Header.SGTotal = 0; |
| 1512 | } |
| 1513 | c->Header.LUN = ioc->LUN_info; |
| 1514 | c->Header.Tag.lower = c->busaddr; |
| 1515 | |
| 1516 | c->Request = ioc->Request; |
| 1517 | if (ioc->buf_size > 0) { |
| 1518 | int i; |
| 1519 | for (i = 0; i < sg_used; i++) { |
| 1520 | temp64.val = |
| 1521 | pci_map_single(host->pdev, buff[i], |
| 1522 | buff_size[i], |
| 1523 | PCI_DMA_BIDIRECTIONAL); |
| 1524 | c->SG[i].Addr.lower = |
| 1525 | temp64.val32.lower; |
| 1526 | c->SG[i].Addr.upper = |
| 1527 | temp64.val32.upper; |
| 1528 | c->SG[i].Len = buff_size[i]; |
| 1529 | c->SG[i].Ext = 0; /* we are not chaining */ |
| 1530 | } |
| 1531 | } |
| 1532 | c->waiting = &wait; |
| 1533 | /* Put the request on the tail of the request queue */ |
| 1534 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 1535 | addQ(&host->reqQ, c); |
| 1536 | host->Qdepth++; |
| 1537 | start_io(host); |
| 1538 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 1539 | wait_for_completion(&wait); |
| 1540 | /* unlock the buffers from DMA */ |
| 1541 | for (i = 0; i < sg_used; i++) { |
| 1542 | temp64.val32.lower = c->SG[i].Addr.lower; |
| 1543 | temp64.val32.upper = c->SG[i].Addr.upper; |
| 1544 | pci_unmap_single(host->pdev, |
| 1545 | (dma_addr_t) temp64.val, buff_size[i], |
| 1546 | PCI_DMA_BIDIRECTIONAL); |
| 1547 | } |
| 1548 | check_ioctl_unit_attention(host, c); |
| 1549 | /* Copy the error information out */ |
| 1550 | ioc->error_info = *(c->err_info); |
| 1551 | if (copy_to_user(argp, ioc, sizeof(*ioc))) { |
| 1552 | cmd_free(host, c, 0); |
| 1553 | status = -EFAULT; |
| 1554 | goto cleanup1; |
| 1555 | } |
| 1556 | if (ioc->Request.Type.Direction == XFER_READ) { |
| 1557 | /* Copy the data out of the buffer we created */ |
| 1558 | BYTE __user *ptr = ioc->buf; |
| 1559 | for (i = 0; i < sg_used; i++) { |
| 1560 | if (copy_to_user |
| 1561 | (ptr, buff[i], buff_size[i])) { |
| 1562 | cmd_free(host, c, 0); |
| 1563 | status = -EFAULT; |
| 1564 | goto cleanup1; |
| 1565 | } |
| 1566 | ptr += buff_size[i]; |
| 1567 | } |
| 1568 | } |
| 1569 | cmd_free(host, c, 0); |
| 1570 | status = 0; |
| 1571 | cleanup1: |
| 1572 | if (buff) { |
| 1573 | for (i = 0; i < sg_used; i++) |
| 1574 | kfree(buff[i]); |
| 1575 | kfree(buff); |
| 1576 | } |
| 1577 | kfree(buff_size); |
| 1578 | kfree(ioc); |
| 1579 | return status; |
| 1580 | } |
| 1581 | |
| 1582 | /* scsi_cmd_ioctl handles these, below, though some are not */ |
| 1583 | /* very meaningful for cciss. SG_IO is the main one people want. */ |
| 1584 | |
| 1585 | case SG_GET_VERSION_NUM: |
| 1586 | case SG_SET_TIMEOUT: |
| 1587 | case SG_GET_TIMEOUT: |
| 1588 | case SG_GET_RESERVED_SIZE: |
| 1589 | case SG_SET_RESERVED_SIZE: |
| 1590 | case SG_EMULATED_HOST: |
| 1591 | case SG_IO: |
| 1592 | case SCSI_IOCTL_SEND_COMMAND: |
| 1593 | return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); |
| 1594 | |
| 1595 | /* scsi_cmd_ioctl would normally handle these, below, but */ |
| 1596 | /* they aren't a good fit for cciss, as CD-ROMs are */ |
| 1597 | /* not supported, and we don't have any bus/target/lun */ |
| 1598 | /* which we present to the kernel. */ |
| 1599 | |
| 1600 | case CDROM_SEND_PACKET: |
| 1601 | case CDROMCLOSETRAY: |
| 1602 | case CDROMEJECT: |
| 1603 | case SCSI_IOCTL_GET_IDLUN: |
| 1604 | case SCSI_IOCTL_GET_BUS_NUMBER: |
| 1605 | default: |
| 1606 | return -ENOTTY; |
| 1607 | } |
| 1608 | } |
| 1609 | |
| 1610 | static void cciss_check_queues(ctlr_info_t *h) |
| 1611 | { |
| 1612 | int start_queue = h->next_to_run; |
| 1613 | int i; |
| 1614 | |
| 1615 | /* check to see if we have maxed out the number of commands that can |
| 1616 | * be placed on the queue. If so then exit. We do this check here |
| 1617 | * in case the interrupt we serviced was from an ioctl and did not |
| 1618 | * free any new commands. |
| 1619 | */ |
| 1620 | if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) |
| 1621 | return; |
| 1622 | |
| 1623 | /* We have room on the queue for more commands. Now we need to queue |
| 1624 | * them up. We will also keep track of the next queue to run so |
| 1625 | * that every queue gets a chance to be started first. |
| 1626 | */ |
| 1627 | for (i = 0; i < h->highest_lun + 1; i++) { |
| 1628 | int curr_queue = (start_queue + i) % (h->highest_lun + 1); |
| 1629 | /* make sure the disk has been added and the drive is real |
| 1630 | * because this can be called from the middle of init_one. |
| 1631 | */ |
| 1632 | if (!h->drv[curr_queue]) |
| 1633 | continue; |
| 1634 | if (!(h->drv[curr_queue]->queue) || |
| 1635 | !(h->drv[curr_queue]->heads)) |
| 1636 | continue; |
| 1637 | blk_start_queue(h->gendisk[curr_queue]->queue); |
| 1638 | |
| 1639 | /* check to see if we have maxed out the number of commands |
| 1640 | * that can be placed on the queue. |
| 1641 | */ |
| 1642 | if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) { |
| 1643 | if (curr_queue == start_queue) { |
| 1644 | h->next_to_run = |
| 1645 | (start_queue + 1) % (h->highest_lun + 1); |
| 1646 | break; |
| 1647 | } else { |
| 1648 | h->next_to_run = curr_queue; |
| 1649 | break; |
| 1650 | } |
| 1651 | } |
| 1652 | } |
| 1653 | } |
| 1654 | |
| 1655 | static void cciss_softirq_done(struct request *rq) |
| 1656 | { |
| 1657 | CommandList_struct *cmd = rq->completion_data; |
| 1658 | ctlr_info_t *h = hba[cmd->ctlr]; |
| 1659 | SGDescriptor_struct *curr_sg = cmd->SG; |
| 1660 | unsigned long flags; |
| 1661 | u64bit temp64; |
| 1662 | int i, ddir; |
| 1663 | int sg_index = 0; |
| 1664 | |
| 1665 | if (cmd->Request.Type.Direction == XFER_READ) |
| 1666 | ddir = PCI_DMA_FROMDEVICE; |
| 1667 | else |
| 1668 | ddir = PCI_DMA_TODEVICE; |
| 1669 | |
| 1670 | /* command did not need to be retried */ |
| 1671 | /* unmap the DMA mapping for all the scatter gather elements */ |
| 1672 | for (i = 0; i < cmd->Header.SGList; i++) { |
| 1673 | if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) { |
| 1674 | temp64.val32.lower = cmd->SG[i].Addr.lower; |
| 1675 | temp64.val32.upper = cmd->SG[i].Addr.upper; |
| 1676 | pci_dma_sync_single_for_cpu(h->pdev, temp64.val, |
| 1677 | cmd->SG[i].Len, ddir); |
| 1678 | pci_unmap_single(h->pdev, temp64.val, |
| 1679 | cmd->SG[i].Len, ddir); |
| 1680 | /* Point to the next block */ |
| 1681 | curr_sg = h->cmd_sg_list[cmd->cmdindex]->sgchain; |
| 1682 | sg_index = 0; |
| 1683 | } |
| 1684 | temp64.val32.lower = curr_sg[sg_index].Addr.lower; |
| 1685 | temp64.val32.upper = curr_sg[sg_index].Addr.upper; |
| 1686 | pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len, |
| 1687 | ddir); |
| 1688 | ++sg_index; |
| 1689 | } |
| 1690 | |
| 1691 | #ifdef CCISS_DEBUG |
| 1692 | printk("Done with %p\n", rq); |
| 1693 | #endif /* CCISS_DEBUG */ |
| 1694 | |
| 1695 | /* set the residual count for pc requests */ |
| 1696 | if (blk_pc_request(rq)) |
| 1697 | rq->resid_len = cmd->err_info->ResidualCnt; |
| 1698 | |
| 1699 | blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO); |
| 1700 | |
| 1701 | spin_lock_irqsave(&h->lock, flags); |
| 1702 | cmd_free(h, cmd, 1); |
| 1703 | cciss_check_queues(h); |
| 1704 | spin_unlock_irqrestore(&h->lock, flags); |
| 1705 | } |
| 1706 | |
| 1707 | static inline void log_unit_to_scsi3addr(ctlr_info_t *h, |
| 1708 | unsigned char scsi3addr[], uint32_t log_unit) |
| 1709 | { |
| 1710 | memcpy(scsi3addr, h->drv[log_unit]->LunID, |
| 1711 | sizeof(h->drv[log_unit]->LunID)); |
| 1712 | } |
| 1713 | |
| 1714 | /* This function gets the SCSI vendor, model, and revision of a logical drive |
| 1715 | * via the inquiry page 0. Model, vendor, and rev are set to empty strings if |
| 1716 | * they cannot be read. |
| 1717 | */ |
| 1718 | static void cciss_get_device_descr(int ctlr, int logvol, |
| 1719 | char *vendor, char *model, char *rev) |
| 1720 | { |
| 1721 | int rc; |
| 1722 | InquiryData_struct *inq_buf; |
| 1723 | unsigned char scsi3addr[8]; |
| 1724 | |
| 1725 | *vendor = '\0'; |
| 1726 | *model = '\0'; |
| 1727 | *rev = '\0'; |
| 1728 | |
| 1729 | inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); |
| 1730 | if (!inq_buf) |
| 1731 | return; |
| 1732 | |
| 1733 | log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); |
| 1734 | rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0, |
| 1735 | scsi3addr, TYPE_CMD); |
| 1736 | if (rc == IO_OK) { |
| 1737 | memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN); |
| 1738 | vendor[VENDOR_LEN] = '\0'; |
| 1739 | memcpy(model, &inq_buf->data_byte[16], MODEL_LEN); |
| 1740 | model[MODEL_LEN] = '\0'; |
| 1741 | memcpy(rev, &inq_buf->data_byte[32], REV_LEN); |
| 1742 | rev[REV_LEN] = '\0'; |
| 1743 | } |
| 1744 | |
| 1745 | kfree(inq_buf); |
| 1746 | return; |
| 1747 | } |
| 1748 | |
| 1749 | /* This function gets the serial number of a logical drive via |
| 1750 | * inquiry page 0x83. Serial no. is 16 bytes. If the serial |
| 1751 | * number cannot be had, for whatever reason, 16 bytes of 0xff |
| 1752 | * are returned instead. |
| 1753 | */ |
| 1754 | static void cciss_get_serial_no(int ctlr, int logvol, |
| 1755 | unsigned char *serial_no, int buflen) |
| 1756 | { |
| 1757 | #define PAGE_83_INQ_BYTES 64 |
| 1758 | int rc; |
| 1759 | unsigned char *buf; |
| 1760 | unsigned char scsi3addr[8]; |
| 1761 | |
| 1762 | if (buflen > 16) |
| 1763 | buflen = 16; |
| 1764 | memset(serial_no, 0xff, buflen); |
| 1765 | buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); |
| 1766 | if (!buf) |
| 1767 | return; |
| 1768 | memset(serial_no, 0, buflen); |
| 1769 | log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); |
| 1770 | rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf, |
| 1771 | PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); |
| 1772 | if (rc == IO_OK) |
| 1773 | memcpy(serial_no, &buf[8], buflen); |
| 1774 | kfree(buf); |
| 1775 | return; |
| 1776 | } |
| 1777 | |
| 1778 | /* |
| 1779 | * cciss_add_disk sets up the block device queue for a logical drive |
| 1780 | */ |
| 1781 | static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, |
| 1782 | int drv_index) |
| 1783 | { |
| 1784 | disk->queue = blk_init_queue(do_cciss_request, &h->lock); |
| 1785 | if (!disk->queue) |
| 1786 | goto init_queue_failure; |
| 1787 | sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index); |
| 1788 | disk->major = h->major; |
| 1789 | disk->first_minor = drv_index << NWD_SHIFT; |
| 1790 | disk->fops = &cciss_fops; |
| 1791 | if (cciss_create_ld_sysfs_entry(h, drv_index)) |
| 1792 | goto cleanup_queue; |
| 1793 | disk->private_data = h->drv[drv_index]; |
| 1794 | disk->driverfs_dev = &h->drv[drv_index]->dev; |
| 1795 | |
| 1796 | /* Set up queue information */ |
| 1797 | blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); |
| 1798 | |
| 1799 | /* This is a hardware imposed limit. */ |
| 1800 | blk_queue_max_hw_segments(disk->queue, h->maxsgentries); |
| 1801 | |
| 1802 | /* This is a limit in the driver and could be eliminated. */ |
| 1803 | blk_queue_max_phys_segments(disk->queue, h->maxsgentries); |
| 1804 | |
| 1805 | blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors); |
| 1806 | |
| 1807 | blk_queue_softirq_done(disk->queue, cciss_softirq_done); |
| 1808 | |
| 1809 | disk->queue->queuedata = h; |
| 1810 | |
| 1811 | blk_queue_logical_block_size(disk->queue, |
| 1812 | h->drv[drv_index]->block_size); |
| 1813 | |
| 1814 | /* Make sure all queue data is written out before */ |
| 1815 | /* setting h->drv[drv_index]->queue, as setting this */ |
| 1816 | /* allows the interrupt handler to start the queue */ |
| 1817 | wmb(); |
| 1818 | h->drv[drv_index]->queue = disk->queue; |
| 1819 | add_disk(disk); |
| 1820 | return 0; |
| 1821 | |
| 1822 | cleanup_queue: |
| 1823 | blk_cleanup_queue(disk->queue); |
| 1824 | disk->queue = NULL; |
| 1825 | init_queue_failure: |
| 1826 | return -1; |
| 1827 | } |
| 1828 | |
| 1829 | /* This function will check the usage_count of the drive to be updated/added. |
| 1830 | * If the usage_count is zero and it is a heretofore unknown drive, or, |
| 1831 | * the drive's capacity, geometry, or serial number has changed, |
| 1832 | * then the drive information will be updated and the disk will be |
| 1833 | * re-registered with the kernel. If these conditions don't hold, |
| 1834 | * then it will be left alone for the next reboot. The exception to this |
| 1835 | * is disk 0 which will always be left registered with the kernel since it |
| 1836 | * is also the controller node. Any changes to disk 0 will show up on |
| 1837 | * the next reboot. |
| 1838 | */ |
| 1839 | static void cciss_update_drive_info(int ctlr, int drv_index, int first_time, |
| 1840 | int via_ioctl) |
| 1841 | { |
| 1842 | ctlr_info_t *h = hba[ctlr]; |
| 1843 | struct gendisk *disk; |
| 1844 | InquiryData_struct *inq_buff = NULL; |
| 1845 | unsigned int block_size; |
| 1846 | sector_t total_size; |
| 1847 | unsigned long flags = 0; |
| 1848 | int ret = 0; |
| 1849 | drive_info_struct *drvinfo; |
| 1850 | |
| 1851 | /* Get information about the disk and modify the driver structure */ |
| 1852 | inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); |
| 1853 | drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL); |
| 1854 | if (inq_buff == NULL || drvinfo == NULL) |
| 1855 | goto mem_msg; |
| 1856 | |
| 1857 | /* testing to see if 16-byte CDBs are already being used */ |
| 1858 | if (h->cciss_read == CCISS_READ_16) { |
| 1859 | cciss_read_capacity_16(h->ctlr, drv_index, |
| 1860 | &total_size, &block_size); |
| 1861 | |
| 1862 | } else { |
| 1863 | cciss_read_capacity(ctlr, drv_index, &total_size, &block_size); |
| 1864 | /* if read_capacity returns all F's this volume is >2TB */ |
| 1865 | /* in size so we switch to 16-byte CDB's for all */ |
| 1866 | /* read/write ops */ |
| 1867 | if (total_size == 0xFFFFFFFFULL) { |
| 1868 | cciss_read_capacity_16(ctlr, drv_index, |
| 1869 | &total_size, &block_size); |
| 1870 | h->cciss_read = CCISS_READ_16; |
| 1871 | h->cciss_write = CCISS_WRITE_16; |
| 1872 | } else { |
| 1873 | h->cciss_read = CCISS_READ_10; |
| 1874 | h->cciss_write = CCISS_WRITE_10; |
| 1875 | } |
| 1876 | } |
| 1877 | |
| 1878 | cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size, |
| 1879 | inq_buff, drvinfo); |
| 1880 | drvinfo->block_size = block_size; |
| 1881 | drvinfo->nr_blocks = total_size + 1; |
| 1882 | |
| 1883 | cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor, |
| 1884 | drvinfo->model, drvinfo->rev); |
| 1885 | cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no, |
| 1886 | sizeof(drvinfo->serial_no)); |
| 1887 | /* Save the lunid in case we deregister the disk, below. */ |
| 1888 | memcpy(drvinfo->LunID, h->drv[drv_index]->LunID, |
| 1889 | sizeof(drvinfo->LunID)); |
| 1890 | |
| 1891 | /* Is it the same disk we already know, and nothing's changed? */ |
| 1892 | if (h->drv[drv_index]->raid_level != -1 && |
| 1893 | ((memcmp(drvinfo->serial_no, |
| 1894 | h->drv[drv_index]->serial_no, 16) == 0) && |
| 1895 | drvinfo->block_size == h->drv[drv_index]->block_size && |
| 1896 | drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks && |
| 1897 | drvinfo->heads == h->drv[drv_index]->heads && |
| 1898 | drvinfo->sectors == h->drv[drv_index]->sectors && |
| 1899 | drvinfo->cylinders == h->drv[drv_index]->cylinders)) |
| 1900 | /* The disk is unchanged, nothing to update */ |
| 1901 | goto freeret; |
| 1902 | |
| 1903 | /* If we get here it's not the same disk, or something's changed, |
| 1904 | * so we need to * deregister it, and re-register it, if it's not |
| 1905 | * in use. |
| 1906 | * If the disk already exists then deregister it before proceeding |
| 1907 | * (unless it's the first disk (for the controller node). |
| 1908 | */ |
| 1909 | if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) { |
| 1910 | printk(KERN_WARNING "disk %d has changed.\n", drv_index); |
| 1911 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 1912 | h->drv[drv_index]->busy_configuring = 1; |
| 1913 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 1914 | |
| 1915 | /* deregister_disk sets h->drv[drv_index]->queue = NULL |
| 1916 | * which keeps the interrupt handler from starting |
| 1917 | * the queue. |
| 1918 | */ |
| 1919 | ret = deregister_disk(h, drv_index, 0, via_ioctl); |
| 1920 | } |
| 1921 | |
| 1922 | /* If the disk is in use return */ |
| 1923 | if (ret) |
| 1924 | goto freeret; |
| 1925 | |
| 1926 | /* Save the new information from cciss_geometry_inquiry |
| 1927 | * and serial number inquiry. If the disk was deregistered |
| 1928 | * above, then h->drv[drv_index] will be NULL. |
| 1929 | */ |
| 1930 | if (h->drv[drv_index] == NULL) { |
| 1931 | drvinfo->device_initialized = 0; |
| 1932 | h->drv[drv_index] = drvinfo; |
| 1933 | drvinfo = NULL; /* so it won't be freed below. */ |
| 1934 | } else { |
| 1935 | /* special case for cxd0 */ |
| 1936 | h->drv[drv_index]->block_size = drvinfo->block_size; |
| 1937 | h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks; |
| 1938 | h->drv[drv_index]->heads = drvinfo->heads; |
| 1939 | h->drv[drv_index]->sectors = drvinfo->sectors; |
| 1940 | h->drv[drv_index]->cylinders = drvinfo->cylinders; |
| 1941 | h->drv[drv_index]->raid_level = drvinfo->raid_level; |
| 1942 | memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16); |
| 1943 | memcpy(h->drv[drv_index]->vendor, drvinfo->vendor, |
| 1944 | VENDOR_LEN + 1); |
| 1945 | memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1); |
| 1946 | memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1); |
| 1947 | } |
| 1948 | |
| 1949 | ++h->num_luns; |
| 1950 | disk = h->gendisk[drv_index]; |
| 1951 | set_capacity(disk, h->drv[drv_index]->nr_blocks); |
| 1952 | |
| 1953 | /* If it's not disk 0 (drv_index != 0) |
| 1954 | * or if it was disk 0, but there was previously |
| 1955 | * no actual corresponding configured logical drive |
| 1956 | * (raid_leve == -1) then we want to update the |
| 1957 | * logical drive's information. |
| 1958 | */ |
| 1959 | if (drv_index || first_time) { |
| 1960 | if (cciss_add_disk(h, disk, drv_index) != 0) { |
| 1961 | cciss_free_gendisk(h, drv_index); |
| 1962 | cciss_free_drive_info(h, drv_index); |
| 1963 | printk(KERN_WARNING "cciss:%d could not update " |
| 1964 | "disk %d\n", h->ctlr, drv_index); |
| 1965 | --h->num_luns; |
| 1966 | } |
| 1967 | } |
| 1968 | |
| 1969 | freeret: |
| 1970 | kfree(inq_buff); |
| 1971 | kfree(drvinfo); |
| 1972 | return; |
| 1973 | mem_msg: |
| 1974 | printk(KERN_ERR "cciss: out of memory\n"); |
| 1975 | goto freeret; |
| 1976 | } |
| 1977 | |
| 1978 | /* This function will find the first index of the controllers drive array |
| 1979 | * that has a null drv pointer and allocate the drive info struct and |
| 1980 | * will return that index This is where new drives will be added. |
| 1981 | * If the index to be returned is greater than the highest_lun index for |
| 1982 | * the controller then highest_lun is set * to this new index. |
| 1983 | * If there are no available indexes or if tha allocation fails, then -1 |
| 1984 | * is returned. * "controller_node" is used to know if this is a real |
| 1985 | * logical drive, or just the controller node, which determines if this |
| 1986 | * counts towards highest_lun. |
| 1987 | */ |
| 1988 | static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node) |
| 1989 | { |
| 1990 | int i; |
| 1991 | drive_info_struct *drv; |
| 1992 | |
| 1993 | /* Search for an empty slot for our drive info */ |
| 1994 | for (i = 0; i < CISS_MAX_LUN; i++) { |
| 1995 | |
| 1996 | /* if not cxd0 case, and it's occupied, skip it. */ |
| 1997 | if (h->drv[i] && i != 0) |
| 1998 | continue; |
| 1999 | /* |
| 2000 | * If it's cxd0 case, and drv is alloc'ed already, and a |
| 2001 | * disk is configured there, skip it. |
| 2002 | */ |
| 2003 | if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1) |
| 2004 | continue; |
| 2005 | |
| 2006 | /* |
| 2007 | * We've found an empty slot. Update highest_lun |
| 2008 | * provided this isn't just the fake cxd0 controller node. |
| 2009 | */ |
| 2010 | if (i > h->highest_lun && !controller_node) |
| 2011 | h->highest_lun = i; |
| 2012 | |
| 2013 | /* If adding a real disk at cxd0, and it's already alloc'ed */ |
| 2014 | if (i == 0 && h->drv[i] != NULL) |
| 2015 | return i; |
| 2016 | |
| 2017 | /* |
| 2018 | * Found an empty slot, not already alloc'ed. Allocate it. |
| 2019 | * Mark it with raid_level == -1, so we know it's new later on. |
| 2020 | */ |
| 2021 | drv = kzalloc(sizeof(*drv), GFP_KERNEL); |
| 2022 | if (!drv) |
| 2023 | return -1; |
| 2024 | drv->raid_level = -1; /* so we know it's new */ |
| 2025 | h->drv[i] = drv; |
| 2026 | return i; |
| 2027 | } |
| 2028 | return -1; |
| 2029 | } |
| 2030 | |
| 2031 | static void cciss_free_drive_info(ctlr_info_t *h, int drv_index) |
| 2032 | { |
| 2033 | kfree(h->drv[drv_index]); |
| 2034 | h->drv[drv_index] = NULL; |
| 2035 | } |
| 2036 | |
| 2037 | static void cciss_free_gendisk(ctlr_info_t *h, int drv_index) |
| 2038 | { |
| 2039 | put_disk(h->gendisk[drv_index]); |
| 2040 | h->gendisk[drv_index] = NULL; |
| 2041 | } |
| 2042 | |
| 2043 | /* cciss_add_gendisk finds a free hba[]->drv structure |
| 2044 | * and allocates a gendisk if needed, and sets the lunid |
| 2045 | * in the drvinfo structure. It returns the index into |
| 2046 | * the ->drv[] array, or -1 if none are free. |
| 2047 | * is_controller_node indicates whether highest_lun should |
| 2048 | * count this disk, or if it's only being added to provide |
| 2049 | * a means to talk to the controller in case no logical |
| 2050 | * drives have yet been configured. |
| 2051 | */ |
| 2052 | static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[], |
| 2053 | int controller_node) |
| 2054 | { |
| 2055 | int drv_index; |
| 2056 | |
| 2057 | drv_index = cciss_alloc_drive_info(h, controller_node); |
| 2058 | if (drv_index == -1) |
| 2059 | return -1; |
| 2060 | |
| 2061 | /*Check if the gendisk needs to be allocated */ |
| 2062 | if (!h->gendisk[drv_index]) { |
| 2063 | h->gendisk[drv_index] = |
| 2064 | alloc_disk(1 << NWD_SHIFT); |
| 2065 | if (!h->gendisk[drv_index]) { |
| 2066 | printk(KERN_ERR "cciss%d: could not " |
| 2067 | "allocate a new disk %d\n", |
| 2068 | h->ctlr, drv_index); |
| 2069 | goto err_free_drive_info; |
| 2070 | } |
| 2071 | } |
| 2072 | memcpy(h->drv[drv_index]->LunID, lunid, |
| 2073 | sizeof(h->drv[drv_index]->LunID)); |
| 2074 | if (cciss_create_ld_sysfs_entry(h, drv_index)) |
| 2075 | goto err_free_disk; |
| 2076 | /* Don't need to mark this busy because nobody */ |
| 2077 | /* else knows about this disk yet to contend */ |
| 2078 | /* for access to it. */ |
| 2079 | h->drv[drv_index]->busy_configuring = 0; |
| 2080 | wmb(); |
| 2081 | return drv_index; |
| 2082 | |
| 2083 | err_free_disk: |
| 2084 | cciss_free_gendisk(h, drv_index); |
| 2085 | err_free_drive_info: |
| 2086 | cciss_free_drive_info(h, drv_index); |
| 2087 | return -1; |
| 2088 | } |
| 2089 | |
| 2090 | /* This is for the special case of a controller which |
| 2091 | * has no logical drives. In this case, we still need |
| 2092 | * to register a disk so the controller can be accessed |
| 2093 | * by the Array Config Utility. |
| 2094 | */ |
| 2095 | static void cciss_add_controller_node(ctlr_info_t *h) |
| 2096 | { |
| 2097 | struct gendisk *disk; |
| 2098 | int drv_index; |
| 2099 | |
| 2100 | if (h->gendisk[0] != NULL) /* already did this? Then bail. */ |
| 2101 | return; |
| 2102 | |
| 2103 | drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1); |
| 2104 | if (drv_index == -1) |
| 2105 | goto error; |
| 2106 | h->drv[drv_index]->block_size = 512; |
| 2107 | h->drv[drv_index]->nr_blocks = 0; |
| 2108 | h->drv[drv_index]->heads = 0; |
| 2109 | h->drv[drv_index]->sectors = 0; |
| 2110 | h->drv[drv_index]->cylinders = 0; |
| 2111 | h->drv[drv_index]->raid_level = -1; |
| 2112 | memset(h->drv[drv_index]->serial_no, 0, 16); |
| 2113 | disk = h->gendisk[drv_index]; |
| 2114 | if (cciss_add_disk(h, disk, drv_index) == 0) |
| 2115 | return; |
| 2116 | cciss_free_gendisk(h, drv_index); |
| 2117 | cciss_free_drive_info(h, drv_index); |
| 2118 | error: |
| 2119 | printk(KERN_WARNING "cciss%d: could not " |
| 2120 | "add disk 0.\n", h->ctlr); |
| 2121 | return; |
| 2122 | } |
| 2123 | |
| 2124 | /* This function will add and remove logical drives from the Logical |
| 2125 | * drive array of the controller and maintain persistency of ordering |
| 2126 | * so that mount points are preserved until the next reboot. This allows |
| 2127 | * for the removal of logical drives in the middle of the drive array |
| 2128 | * without a re-ordering of those drives. |
| 2129 | * INPUT |
| 2130 | * h = The controller to perform the operations on |
| 2131 | */ |
| 2132 | static int rebuild_lun_table(ctlr_info_t *h, int first_time, |
| 2133 | int via_ioctl) |
| 2134 | { |
| 2135 | int ctlr = h->ctlr; |
| 2136 | int num_luns; |
| 2137 | ReportLunData_struct *ld_buff = NULL; |
| 2138 | int return_code; |
| 2139 | int listlength = 0; |
| 2140 | int i; |
| 2141 | int drv_found; |
| 2142 | int drv_index = 0; |
| 2143 | unsigned char lunid[8] = CTLR_LUNID; |
| 2144 | unsigned long flags; |
| 2145 | |
| 2146 | if (!capable(CAP_SYS_RAWIO)) |
| 2147 | return -EPERM; |
| 2148 | |
| 2149 | /* Set busy_configuring flag for this operation */ |
| 2150 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 2151 | if (h->busy_configuring) { |
| 2152 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 2153 | return -EBUSY; |
| 2154 | } |
| 2155 | h->busy_configuring = 1; |
| 2156 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 2157 | |
| 2158 | ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); |
| 2159 | if (ld_buff == NULL) |
| 2160 | goto mem_msg; |
| 2161 | |
| 2162 | return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff, |
| 2163 | sizeof(ReportLunData_struct), |
| 2164 | 0, CTLR_LUNID, TYPE_CMD); |
| 2165 | |
| 2166 | if (return_code == IO_OK) |
| 2167 | listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); |
| 2168 | else { /* reading number of logical volumes failed */ |
| 2169 | printk(KERN_WARNING "cciss: report logical volume" |
| 2170 | " command failed\n"); |
| 2171 | listlength = 0; |
| 2172 | goto freeret; |
| 2173 | } |
| 2174 | |
| 2175 | num_luns = listlength / 8; /* 8 bytes per entry */ |
| 2176 | if (num_luns > CISS_MAX_LUN) { |
| 2177 | num_luns = CISS_MAX_LUN; |
| 2178 | printk(KERN_WARNING "cciss: more luns configured" |
| 2179 | " on controller than can be handled by" |
| 2180 | " this driver.\n"); |
| 2181 | } |
| 2182 | |
| 2183 | if (num_luns == 0) |
| 2184 | cciss_add_controller_node(h); |
| 2185 | |
| 2186 | /* Compare controller drive array to driver's drive array |
| 2187 | * to see if any drives are missing on the controller due |
| 2188 | * to action of Array Config Utility (user deletes drive) |
| 2189 | * and deregister logical drives which have disappeared. |
| 2190 | */ |
| 2191 | for (i = 0; i <= h->highest_lun; i++) { |
| 2192 | int j; |
| 2193 | drv_found = 0; |
| 2194 | |
| 2195 | /* skip holes in the array from already deleted drives */ |
| 2196 | if (h->drv[i] == NULL) |
| 2197 | continue; |
| 2198 | |
| 2199 | for (j = 0; j < num_luns; j++) { |
| 2200 | memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid)); |
| 2201 | if (memcmp(h->drv[i]->LunID, lunid, |
| 2202 | sizeof(lunid)) == 0) { |
| 2203 | drv_found = 1; |
| 2204 | break; |
| 2205 | } |
| 2206 | } |
| 2207 | if (!drv_found) { |
| 2208 | /* Deregister it from the OS, it's gone. */ |
| 2209 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 2210 | h->drv[i]->busy_configuring = 1; |
| 2211 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 2212 | return_code = deregister_disk(h, i, 1, via_ioctl); |
| 2213 | if (h->drv[i] != NULL) |
| 2214 | h->drv[i]->busy_configuring = 0; |
| 2215 | } |
| 2216 | } |
| 2217 | |
| 2218 | /* Compare controller drive array to driver's drive array. |
| 2219 | * Check for updates in the drive information and any new drives |
| 2220 | * on the controller due to ACU adding logical drives, or changing |
| 2221 | * a logical drive's size, etc. Reregister any new/changed drives |
| 2222 | */ |
| 2223 | for (i = 0; i < num_luns; i++) { |
| 2224 | int j; |
| 2225 | |
| 2226 | drv_found = 0; |
| 2227 | |
| 2228 | memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid)); |
| 2229 | /* Find if the LUN is already in the drive array |
| 2230 | * of the driver. If so then update its info |
| 2231 | * if not in use. If it does not exist then find |
| 2232 | * the first free index and add it. |
| 2233 | */ |
| 2234 | for (j = 0; j <= h->highest_lun; j++) { |
| 2235 | if (h->drv[j] != NULL && |
| 2236 | memcmp(h->drv[j]->LunID, lunid, |
| 2237 | sizeof(h->drv[j]->LunID)) == 0) { |
| 2238 | drv_index = j; |
| 2239 | drv_found = 1; |
| 2240 | break; |
| 2241 | } |
| 2242 | } |
| 2243 | |
| 2244 | /* check if the drive was found already in the array */ |
| 2245 | if (!drv_found) { |
| 2246 | drv_index = cciss_add_gendisk(h, lunid, 0); |
| 2247 | if (drv_index == -1) |
| 2248 | goto freeret; |
| 2249 | } |
| 2250 | cciss_update_drive_info(ctlr, drv_index, first_time, |
| 2251 | via_ioctl); |
| 2252 | } /* end for */ |
| 2253 | |
| 2254 | freeret: |
| 2255 | kfree(ld_buff); |
| 2256 | h->busy_configuring = 0; |
| 2257 | /* We return -1 here to tell the ACU that we have registered/updated |
| 2258 | * all of the drives that we can and to keep it from calling us |
| 2259 | * additional times. |
| 2260 | */ |
| 2261 | return -1; |
| 2262 | mem_msg: |
| 2263 | printk(KERN_ERR "cciss: out of memory\n"); |
| 2264 | h->busy_configuring = 0; |
| 2265 | goto freeret; |
| 2266 | } |
| 2267 | |
| 2268 | static void cciss_clear_drive_info(drive_info_struct *drive_info) |
| 2269 | { |
| 2270 | /* zero out the disk size info */ |
| 2271 | drive_info->nr_blocks = 0; |
| 2272 | drive_info->block_size = 0; |
| 2273 | drive_info->heads = 0; |
| 2274 | drive_info->sectors = 0; |
| 2275 | drive_info->cylinders = 0; |
| 2276 | drive_info->raid_level = -1; |
| 2277 | memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no)); |
| 2278 | memset(drive_info->model, 0, sizeof(drive_info->model)); |
| 2279 | memset(drive_info->rev, 0, sizeof(drive_info->rev)); |
| 2280 | memset(drive_info->vendor, 0, sizeof(drive_info->vendor)); |
| 2281 | /* |
| 2282 | * don't clear the LUNID though, we need to remember which |
| 2283 | * one this one is. |
| 2284 | */ |
| 2285 | } |
| 2286 | |
| 2287 | /* This function will deregister the disk and it's queue from the |
| 2288 | * kernel. It must be called with the controller lock held and the |
| 2289 | * drv structures busy_configuring flag set. It's parameters are: |
| 2290 | * |
| 2291 | * disk = This is the disk to be deregistered |
| 2292 | * drv = This is the drive_info_struct associated with the disk to be |
| 2293 | * deregistered. It contains information about the disk used |
| 2294 | * by the driver. |
| 2295 | * clear_all = This flag determines whether or not the disk information |
| 2296 | * is going to be completely cleared out and the highest_lun |
| 2297 | * reset. Sometimes we want to clear out information about |
| 2298 | * the disk in preparation for re-adding it. In this case |
| 2299 | * the highest_lun should be left unchanged and the LunID |
| 2300 | * should not be cleared. |
| 2301 | * via_ioctl |
| 2302 | * This indicates whether we've reached this path via ioctl. |
| 2303 | * This affects the maximum usage count allowed for c0d0 to be messed with. |
| 2304 | * If this path is reached via ioctl(), then the max_usage_count will |
| 2305 | * be 1, as the process calling ioctl() has got to have the device open. |
| 2306 | * If we get here via sysfs, then the max usage count will be zero. |
| 2307 | */ |
| 2308 | static int deregister_disk(ctlr_info_t *h, int drv_index, |
| 2309 | int clear_all, int via_ioctl) |
| 2310 | { |
| 2311 | int i; |
| 2312 | struct gendisk *disk; |
| 2313 | drive_info_struct *drv; |
| 2314 | int recalculate_highest_lun; |
| 2315 | |
| 2316 | if (!capable(CAP_SYS_RAWIO)) |
| 2317 | return -EPERM; |
| 2318 | |
| 2319 | drv = h->drv[drv_index]; |
| 2320 | disk = h->gendisk[drv_index]; |
| 2321 | |
| 2322 | /* make sure logical volume is NOT is use */ |
| 2323 | if (clear_all || (h->gendisk[0] == disk)) { |
| 2324 | if (drv->usage_count > via_ioctl) |
| 2325 | return -EBUSY; |
| 2326 | } else if (drv->usage_count > 0) |
| 2327 | return -EBUSY; |
| 2328 | |
| 2329 | recalculate_highest_lun = (drv == h->drv[h->highest_lun]); |
| 2330 | |
| 2331 | /* invalidate the devices and deregister the disk. If it is disk |
| 2332 | * zero do not deregister it but just zero out it's values. This |
| 2333 | * allows us to delete disk zero but keep the controller registered. |
| 2334 | */ |
| 2335 | if (h->gendisk[0] != disk) { |
| 2336 | struct request_queue *q = disk->queue; |
| 2337 | if (disk->flags & GENHD_FL_UP) { |
| 2338 | cciss_destroy_ld_sysfs_entry(h, drv_index, 0); |
| 2339 | del_gendisk(disk); |
| 2340 | } |
| 2341 | if (q) |
| 2342 | blk_cleanup_queue(q); |
| 2343 | /* If clear_all is set then we are deleting the logical |
| 2344 | * drive, not just refreshing its info. For drives |
| 2345 | * other than disk 0 we will call put_disk. We do not |
| 2346 | * do this for disk 0 as we need it to be able to |
| 2347 | * configure the controller. |
| 2348 | */ |
| 2349 | if (clear_all){ |
| 2350 | /* This isn't pretty, but we need to find the |
| 2351 | * disk in our array and NULL our the pointer. |
| 2352 | * This is so that we will call alloc_disk if |
| 2353 | * this index is used again later. |
| 2354 | */ |
| 2355 | for (i=0; i < CISS_MAX_LUN; i++){ |
| 2356 | if (h->gendisk[i] == disk) { |
| 2357 | h->gendisk[i] = NULL; |
| 2358 | break; |
| 2359 | } |
| 2360 | } |
| 2361 | put_disk(disk); |
| 2362 | } |
| 2363 | } else { |
| 2364 | set_capacity(disk, 0); |
| 2365 | cciss_clear_drive_info(drv); |
| 2366 | } |
| 2367 | |
| 2368 | --h->num_luns; |
| 2369 | |
| 2370 | /* if it was the last disk, find the new hightest lun */ |
| 2371 | if (clear_all && recalculate_highest_lun) { |
| 2372 | int i, newhighest = -1; |
| 2373 | for (i = 0; i <= h->highest_lun; i++) { |
| 2374 | /* if the disk has size > 0, it is available */ |
| 2375 | if (h->drv[i] && h->drv[i]->heads) |
| 2376 | newhighest = i; |
| 2377 | } |
| 2378 | h->highest_lun = newhighest; |
| 2379 | } |
| 2380 | return 0; |
| 2381 | } |
| 2382 | |
| 2383 | static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, |
| 2384 | size_t size, __u8 page_code, unsigned char *scsi3addr, |
| 2385 | int cmd_type) |
| 2386 | { |
| 2387 | ctlr_info_t *h = hba[ctlr]; |
| 2388 | u64bit buff_dma_handle; |
| 2389 | int status = IO_OK; |
| 2390 | |
| 2391 | c->cmd_type = CMD_IOCTL_PEND; |
| 2392 | c->Header.ReplyQueue = 0; |
| 2393 | if (buff != NULL) { |
| 2394 | c->Header.SGList = 1; |
| 2395 | c->Header.SGTotal = 1; |
| 2396 | } else { |
| 2397 | c->Header.SGList = 0; |
| 2398 | c->Header.SGTotal = 0; |
| 2399 | } |
| 2400 | c->Header.Tag.lower = c->busaddr; |
| 2401 | memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); |
| 2402 | |
| 2403 | c->Request.Type.Type = cmd_type; |
| 2404 | if (cmd_type == TYPE_CMD) { |
| 2405 | switch (cmd) { |
| 2406 | case CISS_INQUIRY: |
| 2407 | /* are we trying to read a vital product page */ |
| 2408 | if (page_code != 0) { |
| 2409 | c->Request.CDB[1] = 0x01; |
| 2410 | c->Request.CDB[2] = page_code; |
| 2411 | } |
| 2412 | c->Request.CDBLen = 6; |
| 2413 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 2414 | c->Request.Type.Direction = XFER_READ; |
| 2415 | c->Request.Timeout = 0; |
| 2416 | c->Request.CDB[0] = CISS_INQUIRY; |
| 2417 | c->Request.CDB[4] = size & 0xFF; |
| 2418 | break; |
| 2419 | case CISS_REPORT_LOG: |
| 2420 | case CISS_REPORT_PHYS: |
| 2421 | /* Talking to controller so It's a physical command |
| 2422 | mode = 00 target = 0. Nothing to write. |
| 2423 | */ |
| 2424 | c->Request.CDBLen = 12; |
| 2425 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 2426 | c->Request.Type.Direction = XFER_READ; |
| 2427 | c->Request.Timeout = 0; |
| 2428 | c->Request.CDB[0] = cmd; |
| 2429 | c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */ |
| 2430 | c->Request.CDB[7] = (size >> 16) & 0xFF; |
| 2431 | c->Request.CDB[8] = (size >> 8) & 0xFF; |
| 2432 | c->Request.CDB[9] = size & 0xFF; |
| 2433 | break; |
| 2434 | |
| 2435 | case CCISS_READ_CAPACITY: |
| 2436 | c->Request.CDBLen = 10; |
| 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 | break; |
| 2442 | case CCISS_READ_CAPACITY_16: |
| 2443 | c->Request.CDBLen = 16; |
| 2444 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 2445 | c->Request.Type.Direction = XFER_READ; |
| 2446 | c->Request.Timeout = 0; |
| 2447 | c->Request.CDB[0] = cmd; |
| 2448 | c->Request.CDB[1] = 0x10; |
| 2449 | c->Request.CDB[10] = (size >> 24) & 0xFF; |
| 2450 | c->Request.CDB[11] = (size >> 16) & 0xFF; |
| 2451 | c->Request.CDB[12] = (size >> 8) & 0xFF; |
| 2452 | c->Request.CDB[13] = size & 0xFF; |
| 2453 | c->Request.Timeout = 0; |
| 2454 | c->Request.CDB[0] = cmd; |
| 2455 | break; |
| 2456 | case CCISS_CACHE_FLUSH: |
| 2457 | c->Request.CDBLen = 12; |
| 2458 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 2459 | c->Request.Type.Direction = XFER_WRITE; |
| 2460 | c->Request.Timeout = 0; |
| 2461 | c->Request.CDB[0] = BMIC_WRITE; |
| 2462 | c->Request.CDB[6] = BMIC_CACHE_FLUSH; |
| 2463 | break; |
| 2464 | case TEST_UNIT_READY: |
| 2465 | c->Request.CDBLen = 6; |
| 2466 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 2467 | c->Request.Type.Direction = XFER_NONE; |
| 2468 | c->Request.Timeout = 0; |
| 2469 | break; |
| 2470 | default: |
| 2471 | printk(KERN_WARNING |
| 2472 | "cciss%d: Unknown Command 0x%c\n", ctlr, cmd); |
| 2473 | return IO_ERROR; |
| 2474 | } |
| 2475 | } else if (cmd_type == TYPE_MSG) { |
| 2476 | switch (cmd) { |
| 2477 | case 0: /* ABORT message */ |
| 2478 | c->Request.CDBLen = 12; |
| 2479 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 2480 | c->Request.Type.Direction = XFER_WRITE; |
| 2481 | c->Request.Timeout = 0; |
| 2482 | c->Request.CDB[0] = cmd; /* abort */ |
| 2483 | c->Request.CDB[1] = 0; /* abort a command */ |
| 2484 | /* buff contains the tag of the command to abort */ |
| 2485 | memcpy(&c->Request.CDB[4], buff, 8); |
| 2486 | break; |
| 2487 | case 1: /* RESET message */ |
| 2488 | c->Request.CDBLen = 16; |
| 2489 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 2490 | c->Request.Type.Direction = XFER_NONE; |
| 2491 | c->Request.Timeout = 0; |
| 2492 | memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); |
| 2493 | c->Request.CDB[0] = cmd; /* reset */ |
| 2494 | c->Request.CDB[1] = 0x03; /* reset a target */ |
| 2495 | break; |
| 2496 | case 3: /* No-Op message */ |
| 2497 | c->Request.CDBLen = 1; |
| 2498 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 2499 | c->Request.Type.Direction = XFER_WRITE; |
| 2500 | c->Request.Timeout = 0; |
| 2501 | c->Request.CDB[0] = cmd; |
| 2502 | break; |
| 2503 | default: |
| 2504 | printk(KERN_WARNING |
| 2505 | "cciss%d: unknown message type %d\n", ctlr, cmd); |
| 2506 | return IO_ERROR; |
| 2507 | } |
| 2508 | } else { |
| 2509 | printk(KERN_WARNING |
| 2510 | "cciss%d: unknown command type %d\n", ctlr, cmd_type); |
| 2511 | return IO_ERROR; |
| 2512 | } |
| 2513 | /* Fill in the scatter gather information */ |
| 2514 | if (size > 0) { |
| 2515 | buff_dma_handle.val = (__u64) pci_map_single(h->pdev, |
| 2516 | buff, size, |
| 2517 | PCI_DMA_BIDIRECTIONAL); |
| 2518 | c->SG[0].Addr.lower = buff_dma_handle.val32.lower; |
| 2519 | c->SG[0].Addr.upper = buff_dma_handle.val32.upper; |
| 2520 | c->SG[0].Len = size; |
| 2521 | c->SG[0].Ext = 0; /* we are not chaining */ |
| 2522 | } |
| 2523 | return status; |
| 2524 | } |
| 2525 | |
| 2526 | static int check_target_status(ctlr_info_t *h, CommandList_struct *c) |
| 2527 | { |
| 2528 | switch (c->err_info->ScsiStatus) { |
| 2529 | case SAM_STAT_GOOD: |
| 2530 | return IO_OK; |
| 2531 | case SAM_STAT_CHECK_CONDITION: |
| 2532 | switch (0xf & c->err_info->SenseInfo[2]) { |
| 2533 | case 0: return IO_OK; /* no sense */ |
| 2534 | case 1: return IO_OK; /* recovered error */ |
| 2535 | default: |
| 2536 | if (check_for_unit_attention(h, c)) |
| 2537 | return IO_NEEDS_RETRY; |
| 2538 | printk(KERN_WARNING "cciss%d: cmd 0x%02x " |
| 2539 | "check condition, sense key = 0x%02x\n", |
| 2540 | h->ctlr, c->Request.CDB[0], |
| 2541 | c->err_info->SenseInfo[2]); |
| 2542 | } |
| 2543 | break; |
| 2544 | default: |
| 2545 | printk(KERN_WARNING "cciss%d: cmd 0x%02x" |
| 2546 | "scsi status = 0x%02x\n", h->ctlr, |
| 2547 | c->Request.CDB[0], c->err_info->ScsiStatus); |
| 2548 | break; |
| 2549 | } |
| 2550 | return IO_ERROR; |
| 2551 | } |
| 2552 | |
| 2553 | static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c) |
| 2554 | { |
| 2555 | int return_status = IO_OK; |
| 2556 | |
| 2557 | if (c->err_info->CommandStatus == CMD_SUCCESS) |
| 2558 | return IO_OK; |
| 2559 | |
| 2560 | switch (c->err_info->CommandStatus) { |
| 2561 | case CMD_TARGET_STATUS: |
| 2562 | return_status = check_target_status(h, c); |
| 2563 | break; |
| 2564 | case CMD_DATA_UNDERRUN: |
| 2565 | case CMD_DATA_OVERRUN: |
| 2566 | /* expected for inquiry and report lun commands */ |
| 2567 | break; |
| 2568 | case CMD_INVALID: |
| 2569 | printk(KERN_WARNING "cciss: cmd 0x%02x is " |
| 2570 | "reported invalid\n", c->Request.CDB[0]); |
| 2571 | return_status = IO_ERROR; |
| 2572 | break; |
| 2573 | case CMD_PROTOCOL_ERR: |
| 2574 | printk(KERN_WARNING "cciss: cmd 0x%02x has " |
| 2575 | "protocol error \n", c->Request.CDB[0]); |
| 2576 | return_status = IO_ERROR; |
| 2577 | break; |
| 2578 | case CMD_HARDWARE_ERR: |
| 2579 | printk(KERN_WARNING "cciss: cmd 0x%02x had " |
| 2580 | " hardware error\n", c->Request.CDB[0]); |
| 2581 | return_status = IO_ERROR; |
| 2582 | break; |
| 2583 | case CMD_CONNECTION_LOST: |
| 2584 | printk(KERN_WARNING "cciss: cmd 0x%02x had " |
| 2585 | "connection lost\n", c->Request.CDB[0]); |
| 2586 | return_status = IO_ERROR; |
| 2587 | break; |
| 2588 | case CMD_ABORTED: |
| 2589 | printk(KERN_WARNING "cciss: cmd 0x%02x was " |
| 2590 | "aborted\n", c->Request.CDB[0]); |
| 2591 | return_status = IO_ERROR; |
| 2592 | break; |
| 2593 | case CMD_ABORT_FAILED: |
| 2594 | printk(KERN_WARNING "cciss: cmd 0x%02x reports " |
| 2595 | "abort failed\n", c->Request.CDB[0]); |
| 2596 | return_status = IO_ERROR; |
| 2597 | break; |
| 2598 | case CMD_UNSOLICITED_ABORT: |
| 2599 | printk(KERN_WARNING |
| 2600 | "cciss%d: unsolicited abort 0x%02x\n", h->ctlr, |
| 2601 | c->Request.CDB[0]); |
| 2602 | return_status = IO_NEEDS_RETRY; |
| 2603 | break; |
| 2604 | default: |
| 2605 | printk(KERN_WARNING "cciss: cmd 0x%02x returned " |
| 2606 | "unknown status %x\n", c->Request.CDB[0], |
| 2607 | c->err_info->CommandStatus); |
| 2608 | return_status = IO_ERROR; |
| 2609 | } |
| 2610 | return return_status; |
| 2611 | } |
| 2612 | |
| 2613 | static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, |
| 2614 | int attempt_retry) |
| 2615 | { |
| 2616 | DECLARE_COMPLETION_ONSTACK(wait); |
| 2617 | u64bit buff_dma_handle; |
| 2618 | unsigned long flags; |
| 2619 | int return_status = IO_OK; |
| 2620 | |
| 2621 | resend_cmd2: |
| 2622 | c->waiting = &wait; |
| 2623 | /* Put the request on the tail of the queue and send it */ |
| 2624 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 2625 | addQ(&h->reqQ, c); |
| 2626 | h->Qdepth++; |
| 2627 | start_io(h); |
| 2628 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 2629 | |
| 2630 | wait_for_completion(&wait); |
| 2631 | |
| 2632 | if (c->err_info->CommandStatus == 0 || !attempt_retry) |
| 2633 | goto command_done; |
| 2634 | |
| 2635 | return_status = process_sendcmd_error(h, c); |
| 2636 | |
| 2637 | if (return_status == IO_NEEDS_RETRY && |
| 2638 | c->retry_count < MAX_CMD_RETRIES) { |
| 2639 | printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr, |
| 2640 | c->Request.CDB[0]); |
| 2641 | c->retry_count++; |
| 2642 | /* erase the old error information */ |
| 2643 | memset(c->err_info, 0, sizeof(ErrorInfo_struct)); |
| 2644 | return_status = IO_OK; |
| 2645 | INIT_COMPLETION(wait); |
| 2646 | goto resend_cmd2; |
| 2647 | } |
| 2648 | |
| 2649 | command_done: |
| 2650 | /* unlock the buffers from DMA */ |
| 2651 | buff_dma_handle.val32.lower = c->SG[0].Addr.lower; |
| 2652 | buff_dma_handle.val32.upper = c->SG[0].Addr.upper; |
| 2653 | pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, |
| 2654 | c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); |
| 2655 | return return_status; |
| 2656 | } |
| 2657 | |
| 2658 | static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size, |
| 2659 | __u8 page_code, unsigned char scsi3addr[], |
| 2660 | int cmd_type) |
| 2661 | { |
| 2662 | ctlr_info_t *h = hba[ctlr]; |
| 2663 | CommandList_struct *c; |
| 2664 | int return_status; |
| 2665 | |
| 2666 | c = cmd_alloc(h, 0); |
| 2667 | if (!c) |
| 2668 | return -ENOMEM; |
| 2669 | return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code, |
| 2670 | scsi3addr, cmd_type); |
| 2671 | if (return_status == IO_OK) |
| 2672 | return_status = sendcmd_withirq_core(h, c, 1); |
| 2673 | |
| 2674 | cmd_free(h, c, 0); |
| 2675 | return return_status; |
| 2676 | } |
| 2677 | |
| 2678 | static void cciss_geometry_inquiry(int ctlr, int logvol, |
| 2679 | sector_t total_size, |
| 2680 | unsigned int block_size, |
| 2681 | InquiryData_struct *inq_buff, |
| 2682 | drive_info_struct *drv) |
| 2683 | { |
| 2684 | int return_code; |
| 2685 | unsigned long t; |
| 2686 | unsigned char scsi3addr[8]; |
| 2687 | |
| 2688 | memset(inq_buff, 0, sizeof(InquiryData_struct)); |
| 2689 | log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); |
| 2690 | return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff, |
| 2691 | sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD); |
| 2692 | if (return_code == IO_OK) { |
| 2693 | if (inq_buff->data_byte[8] == 0xFF) { |
| 2694 | printk(KERN_WARNING |
| 2695 | "cciss: reading geometry failed, volume " |
| 2696 | "does not support reading geometry\n"); |
| 2697 | drv->heads = 255; |
| 2698 | drv->sectors = 32; /* Sectors per track */ |
| 2699 | drv->cylinders = total_size + 1; |
| 2700 | drv->raid_level = RAID_UNKNOWN; |
| 2701 | } else { |
| 2702 | drv->heads = inq_buff->data_byte[6]; |
| 2703 | drv->sectors = inq_buff->data_byte[7]; |
| 2704 | drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8; |
| 2705 | drv->cylinders += inq_buff->data_byte[5]; |
| 2706 | drv->raid_level = inq_buff->data_byte[8]; |
| 2707 | } |
| 2708 | drv->block_size = block_size; |
| 2709 | drv->nr_blocks = total_size + 1; |
| 2710 | t = drv->heads * drv->sectors; |
| 2711 | if (t > 1) { |
| 2712 | sector_t real_size = total_size + 1; |
| 2713 | unsigned long rem = sector_div(real_size, t); |
| 2714 | if (rem) |
| 2715 | real_size++; |
| 2716 | drv->cylinders = real_size; |
| 2717 | } |
| 2718 | } else { /* Get geometry failed */ |
| 2719 | printk(KERN_WARNING "cciss: reading geometry failed\n"); |
| 2720 | } |
| 2721 | } |
| 2722 | |
| 2723 | static void |
| 2724 | cciss_read_capacity(int ctlr, int logvol, sector_t *total_size, |
| 2725 | unsigned int *block_size) |
| 2726 | { |
| 2727 | ReadCapdata_struct *buf; |
| 2728 | int return_code; |
| 2729 | unsigned char scsi3addr[8]; |
| 2730 | |
| 2731 | buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL); |
| 2732 | if (!buf) { |
| 2733 | printk(KERN_WARNING "cciss: out of memory\n"); |
| 2734 | return; |
| 2735 | } |
| 2736 | |
| 2737 | log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); |
| 2738 | return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf, |
| 2739 | sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD); |
| 2740 | if (return_code == IO_OK) { |
| 2741 | *total_size = be32_to_cpu(*(__be32 *) buf->total_size); |
| 2742 | *block_size = be32_to_cpu(*(__be32 *) buf->block_size); |
| 2743 | } else { /* read capacity command failed */ |
| 2744 | printk(KERN_WARNING "cciss: read capacity failed\n"); |
| 2745 | *total_size = 0; |
| 2746 | *block_size = BLOCK_SIZE; |
| 2747 | } |
| 2748 | kfree(buf); |
| 2749 | } |
| 2750 | |
| 2751 | static void cciss_read_capacity_16(int ctlr, int logvol, |
| 2752 | sector_t *total_size, unsigned int *block_size) |
| 2753 | { |
| 2754 | ReadCapdata_struct_16 *buf; |
| 2755 | int return_code; |
| 2756 | unsigned char scsi3addr[8]; |
| 2757 | |
| 2758 | buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL); |
| 2759 | if (!buf) { |
| 2760 | printk(KERN_WARNING "cciss: out of memory\n"); |
| 2761 | return; |
| 2762 | } |
| 2763 | |
| 2764 | log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol); |
| 2765 | return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16, |
| 2766 | ctlr, buf, sizeof(ReadCapdata_struct_16), |
| 2767 | 0, scsi3addr, TYPE_CMD); |
| 2768 | if (return_code == IO_OK) { |
| 2769 | *total_size = be64_to_cpu(*(__be64 *) buf->total_size); |
| 2770 | *block_size = be32_to_cpu(*(__be32 *) buf->block_size); |
| 2771 | } else { /* read capacity command failed */ |
| 2772 | printk(KERN_WARNING "cciss: read capacity failed\n"); |
| 2773 | *total_size = 0; |
| 2774 | *block_size = BLOCK_SIZE; |
| 2775 | } |
| 2776 | printk(KERN_INFO " blocks= %llu block_size= %d\n", |
| 2777 | (unsigned long long)*total_size+1, *block_size); |
| 2778 | kfree(buf); |
| 2779 | } |
| 2780 | |
| 2781 | static int cciss_revalidate(struct gendisk *disk) |
| 2782 | { |
| 2783 | ctlr_info_t *h = get_host(disk); |
| 2784 | drive_info_struct *drv = get_drv(disk); |
| 2785 | int logvol; |
| 2786 | int FOUND = 0; |
| 2787 | unsigned int block_size; |
| 2788 | sector_t total_size; |
| 2789 | InquiryData_struct *inq_buff = NULL; |
| 2790 | |
| 2791 | for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { |
| 2792 | if (memcmp(h->drv[logvol]->LunID, drv->LunID, |
| 2793 | sizeof(drv->LunID)) == 0) { |
| 2794 | FOUND = 1; |
| 2795 | break; |
| 2796 | } |
| 2797 | } |
| 2798 | |
| 2799 | if (!FOUND) |
| 2800 | return 1; |
| 2801 | |
| 2802 | inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); |
| 2803 | if (inq_buff == NULL) { |
| 2804 | printk(KERN_WARNING "cciss: out of memory\n"); |
| 2805 | return 1; |
| 2806 | } |
| 2807 | if (h->cciss_read == CCISS_READ_10) { |
| 2808 | cciss_read_capacity(h->ctlr, logvol, |
| 2809 | &total_size, &block_size); |
| 2810 | } else { |
| 2811 | cciss_read_capacity_16(h->ctlr, logvol, |
| 2812 | &total_size, &block_size); |
| 2813 | } |
| 2814 | cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size, |
| 2815 | inq_buff, drv); |
| 2816 | |
| 2817 | blk_queue_logical_block_size(drv->queue, drv->block_size); |
| 2818 | set_capacity(disk, drv->nr_blocks); |
| 2819 | |
| 2820 | kfree(inq_buff); |
| 2821 | return 0; |
| 2822 | } |
| 2823 | |
| 2824 | /* |
| 2825 | * Map (physical) PCI mem into (virtual) kernel space |
| 2826 | */ |
| 2827 | static void __iomem *remap_pci_mem(ulong base, ulong size) |
| 2828 | { |
| 2829 | ulong page_base = ((ulong) base) & PAGE_MASK; |
| 2830 | ulong page_offs = ((ulong) base) - page_base; |
| 2831 | void __iomem *page_remapped = ioremap(page_base, page_offs + size); |
| 2832 | |
| 2833 | return page_remapped ? (page_remapped + page_offs) : NULL; |
| 2834 | } |
| 2835 | |
| 2836 | /* |
| 2837 | * Takes jobs of the Q and sends them to the hardware, then puts it on |
| 2838 | * the Q to wait for completion. |
| 2839 | */ |
| 2840 | static void start_io(ctlr_info_t *h) |
| 2841 | { |
| 2842 | CommandList_struct *c; |
| 2843 | |
| 2844 | while (!hlist_empty(&h->reqQ)) { |
| 2845 | c = hlist_entry(h->reqQ.first, CommandList_struct, list); |
| 2846 | /* can't do anything if fifo is full */ |
| 2847 | if ((h->access.fifo_full(h))) { |
| 2848 | printk(KERN_WARNING "cciss: fifo full\n"); |
| 2849 | break; |
| 2850 | } |
| 2851 | |
| 2852 | /* Get the first entry from the Request Q */ |
| 2853 | removeQ(c); |
| 2854 | h->Qdepth--; |
| 2855 | |
| 2856 | /* Tell the controller execute command */ |
| 2857 | h->access.submit_command(h, c); |
| 2858 | |
| 2859 | /* Put job onto the completed Q */ |
| 2860 | addQ(&h->cmpQ, c); |
| 2861 | } |
| 2862 | } |
| 2863 | |
| 2864 | /* Assumes that CCISS_LOCK(h->ctlr) is held. */ |
| 2865 | /* Zeros out the error record and then resends the command back */ |
| 2866 | /* to the controller */ |
| 2867 | static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c) |
| 2868 | { |
| 2869 | /* erase the old error information */ |
| 2870 | memset(c->err_info, 0, sizeof(ErrorInfo_struct)); |
| 2871 | |
| 2872 | /* add it to software queue and then send it to the controller */ |
| 2873 | addQ(&h->reqQ, c); |
| 2874 | h->Qdepth++; |
| 2875 | if (h->Qdepth > h->maxQsinceinit) |
| 2876 | h->maxQsinceinit = h->Qdepth; |
| 2877 | |
| 2878 | start_io(h); |
| 2879 | } |
| 2880 | |
| 2881 | static inline unsigned int make_status_bytes(unsigned int scsi_status_byte, |
| 2882 | unsigned int msg_byte, unsigned int host_byte, |
| 2883 | unsigned int driver_byte) |
| 2884 | { |
| 2885 | /* inverse of macros in scsi.h */ |
| 2886 | return (scsi_status_byte & 0xff) | |
| 2887 | ((msg_byte & 0xff) << 8) | |
| 2888 | ((host_byte & 0xff) << 16) | |
| 2889 | ((driver_byte & 0xff) << 24); |
| 2890 | } |
| 2891 | |
| 2892 | static inline int evaluate_target_status(ctlr_info_t *h, |
| 2893 | CommandList_struct *cmd, int *retry_cmd) |
| 2894 | { |
| 2895 | unsigned char sense_key; |
| 2896 | unsigned char status_byte, msg_byte, host_byte, driver_byte; |
| 2897 | int error_value; |
| 2898 | |
| 2899 | *retry_cmd = 0; |
| 2900 | /* If we get in here, it means we got "target status", that is, scsi status */ |
| 2901 | status_byte = cmd->err_info->ScsiStatus; |
| 2902 | driver_byte = DRIVER_OK; |
| 2903 | msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */ |
| 2904 | |
| 2905 | if (blk_pc_request(cmd->rq)) |
| 2906 | host_byte = DID_PASSTHROUGH; |
| 2907 | else |
| 2908 | host_byte = DID_OK; |
| 2909 | |
| 2910 | error_value = make_status_bytes(status_byte, msg_byte, |
| 2911 | host_byte, driver_byte); |
| 2912 | |
| 2913 | if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) { |
| 2914 | if (!blk_pc_request(cmd->rq)) |
| 2915 | printk(KERN_WARNING "cciss: cmd %p " |
| 2916 | "has SCSI Status 0x%x\n", |
| 2917 | cmd, cmd->err_info->ScsiStatus); |
| 2918 | return error_value; |
| 2919 | } |
| 2920 | |
| 2921 | /* check the sense key */ |
| 2922 | sense_key = 0xf & cmd->err_info->SenseInfo[2]; |
| 2923 | /* no status or recovered error */ |
| 2924 | if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq)) |
| 2925 | error_value = 0; |
| 2926 | |
| 2927 | if (check_for_unit_attention(h, cmd)) { |
| 2928 | *retry_cmd = !blk_pc_request(cmd->rq); |
| 2929 | return 0; |
| 2930 | } |
| 2931 | |
| 2932 | if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */ |
| 2933 | if (error_value != 0) |
| 2934 | printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION" |
| 2935 | " sense key = 0x%x\n", cmd, sense_key); |
| 2936 | return error_value; |
| 2937 | } |
| 2938 | |
| 2939 | /* SG_IO or similar, copy sense data back */ |
| 2940 | if (cmd->rq->sense) { |
| 2941 | if (cmd->rq->sense_len > cmd->err_info->SenseLen) |
| 2942 | cmd->rq->sense_len = cmd->err_info->SenseLen; |
| 2943 | memcpy(cmd->rq->sense, cmd->err_info->SenseInfo, |
| 2944 | cmd->rq->sense_len); |
| 2945 | } else |
| 2946 | cmd->rq->sense_len = 0; |
| 2947 | |
| 2948 | return error_value; |
| 2949 | } |
| 2950 | |
| 2951 | /* checks the status of the job and calls complete buffers to mark all |
| 2952 | * buffers for the completed job. Note that this function does not need |
| 2953 | * to hold the hba/queue lock. |
| 2954 | */ |
| 2955 | static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd, |
| 2956 | int timeout) |
| 2957 | { |
| 2958 | int retry_cmd = 0; |
| 2959 | struct request *rq = cmd->rq; |
| 2960 | |
| 2961 | rq->errors = 0; |
| 2962 | |
| 2963 | if (timeout) |
| 2964 | rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT); |
| 2965 | |
| 2966 | if (cmd->err_info->CommandStatus == 0) /* no error has occurred */ |
| 2967 | goto after_error_processing; |
| 2968 | |
| 2969 | switch (cmd->err_info->CommandStatus) { |
| 2970 | case CMD_TARGET_STATUS: |
| 2971 | rq->errors = evaluate_target_status(h, cmd, &retry_cmd); |
| 2972 | break; |
| 2973 | case CMD_DATA_UNDERRUN: |
| 2974 | if (blk_fs_request(cmd->rq)) { |
| 2975 | printk(KERN_WARNING "cciss: cmd %p has" |
| 2976 | " completed with data underrun " |
| 2977 | "reported\n", cmd); |
| 2978 | cmd->rq->resid_len = cmd->err_info->ResidualCnt; |
| 2979 | } |
| 2980 | break; |
| 2981 | case CMD_DATA_OVERRUN: |
| 2982 | if (blk_fs_request(cmd->rq)) |
| 2983 | printk(KERN_WARNING "cciss: cmd %p has" |
| 2984 | " completed with data overrun " |
| 2985 | "reported\n", cmd); |
| 2986 | break; |
| 2987 | case CMD_INVALID: |
| 2988 | printk(KERN_WARNING "cciss: cmd %p is " |
| 2989 | "reported invalid\n", cmd); |
| 2990 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 2991 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 2992 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); |
| 2993 | break; |
| 2994 | case CMD_PROTOCOL_ERR: |
| 2995 | printk(KERN_WARNING "cciss: cmd %p has " |
| 2996 | "protocol error \n", cmd); |
| 2997 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 2998 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 2999 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); |
| 3000 | break; |
| 3001 | case CMD_HARDWARE_ERR: |
| 3002 | printk(KERN_WARNING "cciss: cmd %p had " |
| 3003 | " hardware error\n", cmd); |
| 3004 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 3005 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 3006 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); |
| 3007 | break; |
| 3008 | case CMD_CONNECTION_LOST: |
| 3009 | printk(KERN_WARNING "cciss: cmd %p had " |
| 3010 | "connection lost\n", cmd); |
| 3011 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 3012 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 3013 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); |
| 3014 | break; |
| 3015 | case CMD_ABORTED: |
| 3016 | printk(KERN_WARNING "cciss: cmd %p was " |
| 3017 | "aborted\n", cmd); |
| 3018 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 3019 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 3020 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); |
| 3021 | break; |
| 3022 | case CMD_ABORT_FAILED: |
| 3023 | printk(KERN_WARNING "cciss: cmd %p reports " |
| 3024 | "abort failed\n", cmd); |
| 3025 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 3026 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 3027 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); |
| 3028 | break; |
| 3029 | case CMD_UNSOLICITED_ABORT: |
| 3030 | printk(KERN_WARNING "cciss%d: unsolicited " |
| 3031 | "abort %p\n", h->ctlr, cmd); |
| 3032 | if (cmd->retry_count < MAX_CMD_RETRIES) { |
| 3033 | retry_cmd = 1; |
| 3034 | printk(KERN_WARNING |
| 3035 | "cciss%d: retrying %p\n", h->ctlr, cmd); |
| 3036 | cmd->retry_count++; |
| 3037 | } else |
| 3038 | printk(KERN_WARNING |
| 3039 | "cciss%d: %p retried too " |
| 3040 | "many times\n", h->ctlr, cmd); |
| 3041 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 3042 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 3043 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT); |
| 3044 | break; |
| 3045 | case CMD_TIMEOUT: |
| 3046 | printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd); |
| 3047 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 3048 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 3049 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); |
| 3050 | break; |
| 3051 | default: |
| 3052 | printk(KERN_WARNING "cciss: cmd %p returned " |
| 3053 | "unknown status %x\n", cmd, |
| 3054 | cmd->err_info->CommandStatus); |
| 3055 | rq->errors = make_status_bytes(SAM_STAT_GOOD, |
| 3056 | cmd->err_info->CommandStatus, DRIVER_OK, |
| 3057 | blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR); |
| 3058 | } |
| 3059 | |
| 3060 | after_error_processing: |
| 3061 | |
| 3062 | /* We need to return this command */ |
| 3063 | if (retry_cmd) { |
| 3064 | resend_cciss_cmd(h, cmd); |
| 3065 | return; |
| 3066 | } |
| 3067 | cmd->rq->completion_data = cmd; |
| 3068 | blk_complete_request(cmd->rq); |
| 3069 | } |
| 3070 | |
| 3071 | /* |
| 3072 | * Get a request and submit it to the controller. |
| 3073 | */ |
| 3074 | static void do_cciss_request(struct request_queue *q) |
| 3075 | { |
| 3076 | ctlr_info_t *h = q->queuedata; |
| 3077 | CommandList_struct *c; |
| 3078 | sector_t start_blk; |
| 3079 | int seg; |
| 3080 | struct request *creq; |
| 3081 | u64bit temp64; |
| 3082 | struct scatterlist *tmp_sg; |
| 3083 | SGDescriptor_struct *curr_sg; |
| 3084 | drive_info_struct *drv; |
| 3085 | int i, dir; |
| 3086 | int nseg = 0; |
| 3087 | int sg_index = 0; |
| 3088 | int chained = 0; |
| 3089 | |
| 3090 | /* We call start_io here in case there is a command waiting on the |
| 3091 | * queue that has not been sent. |
| 3092 | */ |
| 3093 | if (blk_queue_plugged(q)) |
| 3094 | goto startio; |
| 3095 | |
| 3096 | queue: |
| 3097 | creq = blk_peek_request(q); |
| 3098 | if (!creq) |
| 3099 | goto startio; |
| 3100 | |
| 3101 | BUG_ON(creq->nr_phys_segments > h->maxsgentries); |
| 3102 | |
| 3103 | if ((c = cmd_alloc(h, 1)) == NULL) |
| 3104 | goto full; |
| 3105 | |
| 3106 | blk_start_request(creq); |
| 3107 | |
| 3108 | tmp_sg = h->scatter_list[c->cmdindex]; |
| 3109 | spin_unlock_irq(q->queue_lock); |
| 3110 | |
| 3111 | c->cmd_type = CMD_RWREQ; |
| 3112 | c->rq = creq; |
| 3113 | |
| 3114 | /* fill in the request */ |
| 3115 | drv = creq->rq_disk->private_data; |
| 3116 | c->Header.ReplyQueue = 0; /* unused in simple mode */ |
| 3117 | /* got command from pool, so use the command block index instead */ |
| 3118 | /* for direct lookups. */ |
| 3119 | /* The first 2 bits are reserved for controller error reporting. */ |
| 3120 | c->Header.Tag.lower = (c->cmdindex << 3); |
| 3121 | c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */ |
| 3122 | memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID)); |
| 3123 | c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */ |
| 3124 | c->Request.Type.Type = TYPE_CMD; /* It is a command. */ |
| 3125 | c->Request.Type.Attribute = ATTR_SIMPLE; |
| 3126 | c->Request.Type.Direction = |
| 3127 | (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE; |
| 3128 | c->Request.Timeout = 0; /* Don't time out */ |
| 3129 | c->Request.CDB[0] = |
| 3130 | (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write; |
| 3131 | start_blk = blk_rq_pos(creq); |
| 3132 | #ifdef CCISS_DEBUG |
| 3133 | printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", |
| 3134 | (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq)); |
| 3135 | #endif /* CCISS_DEBUG */ |
| 3136 | |
| 3137 | sg_init_table(tmp_sg, h->maxsgentries); |
| 3138 | seg = blk_rq_map_sg(q, creq, tmp_sg); |
| 3139 | |
| 3140 | /* get the DMA records for the setup */ |
| 3141 | if (c->Request.Type.Direction == XFER_READ) |
| 3142 | dir = PCI_DMA_FROMDEVICE; |
| 3143 | else |
| 3144 | dir = PCI_DMA_TODEVICE; |
| 3145 | |
| 3146 | curr_sg = c->SG; |
| 3147 | sg_index = 0; |
| 3148 | chained = 0; |
| 3149 | |
| 3150 | for (i = 0; i < seg; i++) { |
| 3151 | if (((sg_index+1) == (h->max_cmd_sgentries)) && |
| 3152 | !chained && ((seg - i) > 1)) { |
| 3153 | nseg = seg - i; |
| 3154 | curr_sg[sg_index].Len = (nseg) * |
| 3155 | sizeof(SGDescriptor_struct); |
| 3156 | curr_sg[sg_index].Ext = CCISS_SG_CHAIN; |
| 3157 | |
| 3158 | /* Point to next chain block. */ |
| 3159 | curr_sg = h->cmd_sg_list[c->cmdindex]->sgchain; |
| 3160 | sg_index = 0; |
| 3161 | chained = 1; |
| 3162 | } |
| 3163 | curr_sg[sg_index].Len = tmp_sg[i].length; |
| 3164 | temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]), |
| 3165 | tmp_sg[i].offset, |
| 3166 | tmp_sg[i].length, dir); |
| 3167 | curr_sg[sg_index].Addr.lower = temp64.val32.lower; |
| 3168 | curr_sg[sg_index].Addr.upper = temp64.val32.upper; |
| 3169 | curr_sg[sg_index].Ext = 0; /* we are not chaining */ |
| 3170 | |
| 3171 | ++sg_index; |
| 3172 | } |
| 3173 | |
| 3174 | if (chained) { |
| 3175 | int len; |
| 3176 | curr_sg = c->SG; |
| 3177 | sg_index = h->max_cmd_sgentries - 1; |
| 3178 | len = curr_sg[sg_index].Len; |
| 3179 | /* Setup pointer to next chain block. |
| 3180 | * Fill out last element in current chain |
| 3181 | * block with address of next chain block. |
| 3182 | */ |
| 3183 | temp64.val = pci_map_single(h->pdev, |
| 3184 | h->cmd_sg_list[c->cmdindex]->sgchain, |
| 3185 | len, dir); |
| 3186 | |
| 3187 | h->cmd_sg_list[c->cmdindex]->sg_chain_dma = temp64.val; |
| 3188 | curr_sg[sg_index].Addr.lower = temp64.val32.lower; |
| 3189 | curr_sg[sg_index].Addr.upper = temp64.val32.upper; |
| 3190 | |
| 3191 | pci_dma_sync_single_for_device(h->pdev, |
| 3192 | h->cmd_sg_list[c->cmdindex]->sg_chain_dma, |
| 3193 | len, dir); |
| 3194 | } |
| 3195 | |
| 3196 | /* track how many SG entries we are using */ |
| 3197 | if (seg > h->maxSG) |
| 3198 | h->maxSG = seg; |
| 3199 | |
| 3200 | #ifdef CCISS_DEBUG |
| 3201 | printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments " |
| 3202 | "chained[%d]\n", |
| 3203 | blk_rq_sectors(creq), seg, chained); |
| 3204 | #endif /* CCISS_DEBUG */ |
| 3205 | |
| 3206 | c->Header.SGList = c->Header.SGTotal = seg + chained; |
| 3207 | if (seg > h->max_cmd_sgentries) |
| 3208 | c->Header.SGList = h->max_cmd_sgentries; |
| 3209 | |
| 3210 | if (likely(blk_fs_request(creq))) { |
| 3211 | if(h->cciss_read == CCISS_READ_10) { |
| 3212 | c->Request.CDB[1] = 0; |
| 3213 | c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */ |
| 3214 | c->Request.CDB[3] = (start_blk >> 16) & 0xff; |
| 3215 | c->Request.CDB[4] = (start_blk >> 8) & 0xff; |
| 3216 | c->Request.CDB[5] = start_blk & 0xff; |
| 3217 | c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */ |
| 3218 | c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff; |
| 3219 | c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff; |
| 3220 | c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0; |
| 3221 | } else { |
| 3222 | u32 upper32 = upper_32_bits(start_blk); |
| 3223 | |
| 3224 | c->Request.CDBLen = 16; |
| 3225 | c->Request.CDB[1]= 0; |
| 3226 | c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */ |
| 3227 | c->Request.CDB[3]= (upper32 >> 16) & 0xff; |
| 3228 | c->Request.CDB[4]= (upper32 >> 8) & 0xff; |
| 3229 | c->Request.CDB[5]= upper32 & 0xff; |
| 3230 | c->Request.CDB[6]= (start_blk >> 24) & 0xff; |
| 3231 | c->Request.CDB[7]= (start_blk >> 16) & 0xff; |
| 3232 | c->Request.CDB[8]= (start_blk >> 8) & 0xff; |
| 3233 | c->Request.CDB[9]= start_blk & 0xff; |
| 3234 | c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff; |
| 3235 | c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff; |
| 3236 | c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff; |
| 3237 | c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff; |
| 3238 | c->Request.CDB[14] = c->Request.CDB[15] = 0; |
| 3239 | } |
| 3240 | } else if (blk_pc_request(creq)) { |
| 3241 | c->Request.CDBLen = creq->cmd_len; |
| 3242 | memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB); |
| 3243 | } else { |
| 3244 | printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type); |
| 3245 | BUG(); |
| 3246 | } |
| 3247 | |
| 3248 | spin_lock_irq(q->queue_lock); |
| 3249 | |
| 3250 | addQ(&h->reqQ, c); |
| 3251 | h->Qdepth++; |
| 3252 | if (h->Qdepth > h->maxQsinceinit) |
| 3253 | h->maxQsinceinit = h->Qdepth; |
| 3254 | |
| 3255 | goto queue; |
| 3256 | full: |
| 3257 | blk_stop_queue(q); |
| 3258 | startio: |
| 3259 | /* We will already have the driver lock here so not need |
| 3260 | * to lock it. |
| 3261 | */ |
| 3262 | start_io(h); |
| 3263 | } |
| 3264 | |
| 3265 | static inline unsigned long get_next_completion(ctlr_info_t *h) |
| 3266 | { |
| 3267 | return h->access.command_completed(h); |
| 3268 | } |
| 3269 | |
| 3270 | static inline int interrupt_pending(ctlr_info_t *h) |
| 3271 | { |
| 3272 | return h->access.intr_pending(h); |
| 3273 | } |
| 3274 | |
| 3275 | static inline long interrupt_not_for_us(ctlr_info_t *h) |
| 3276 | { |
| 3277 | return (((h->access.intr_pending(h) == 0) || |
| 3278 | (h->interrupts_enabled == 0))); |
| 3279 | } |
| 3280 | |
| 3281 | static irqreturn_t do_cciss_intr(int irq, void *dev_id) |
| 3282 | { |
| 3283 | ctlr_info_t *h = dev_id; |
| 3284 | CommandList_struct *c; |
| 3285 | unsigned long flags; |
| 3286 | __u32 a, a1, a2; |
| 3287 | |
| 3288 | if (interrupt_not_for_us(h)) |
| 3289 | return IRQ_NONE; |
| 3290 | /* |
| 3291 | * If there are completed commands in the completion queue, |
| 3292 | * we had better do something about it. |
| 3293 | */ |
| 3294 | spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); |
| 3295 | while (interrupt_pending(h)) { |
| 3296 | while ((a = get_next_completion(h)) != FIFO_EMPTY) { |
| 3297 | a1 = a; |
| 3298 | if ((a & 0x04)) { |
| 3299 | a2 = (a >> 3); |
| 3300 | if (a2 >= h->nr_cmds) { |
| 3301 | printk(KERN_WARNING |
| 3302 | "cciss: controller cciss%d failed, stopping.\n", |
| 3303 | h->ctlr); |
| 3304 | fail_all_cmds(h->ctlr); |
| 3305 | return IRQ_HANDLED; |
| 3306 | } |
| 3307 | |
| 3308 | c = h->cmd_pool + a2; |
| 3309 | a = c->busaddr; |
| 3310 | |
| 3311 | } else { |
| 3312 | struct hlist_node *tmp; |
| 3313 | |
| 3314 | a &= ~3; |
| 3315 | c = NULL; |
| 3316 | hlist_for_each_entry(c, tmp, &h->cmpQ, list) { |
| 3317 | if (c->busaddr == a) |
| 3318 | break; |
| 3319 | } |
| 3320 | } |
| 3321 | /* |
| 3322 | * If we've found the command, take it off the |
| 3323 | * completion Q and free it |
| 3324 | */ |
| 3325 | if (c && c->busaddr == a) { |
| 3326 | removeQ(c); |
| 3327 | if (c->cmd_type == CMD_RWREQ) { |
| 3328 | complete_command(h, c, 0); |
| 3329 | } else if (c->cmd_type == CMD_IOCTL_PEND) { |
| 3330 | complete(c->waiting); |
| 3331 | } |
| 3332 | # ifdef CONFIG_CISS_SCSI_TAPE |
| 3333 | else if (c->cmd_type == CMD_SCSI) |
| 3334 | complete_scsi_command(c, 0, a1); |
| 3335 | # endif |
| 3336 | continue; |
| 3337 | } |
| 3338 | } |
| 3339 | } |
| 3340 | |
| 3341 | spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); |
| 3342 | return IRQ_HANDLED; |
| 3343 | } |
| 3344 | |
| 3345 | /** |
| 3346 | * add_to_scan_list() - add controller to rescan queue |
| 3347 | * @h: Pointer to the controller. |
| 3348 | * |
| 3349 | * Adds the controller to the rescan queue if not already on the queue. |
| 3350 | * |
| 3351 | * returns 1 if added to the queue, 0 if skipped (could be on the |
| 3352 | * queue already, or the controller could be initializing or shutting |
| 3353 | * down). |
| 3354 | **/ |
| 3355 | static int add_to_scan_list(struct ctlr_info *h) |
| 3356 | { |
| 3357 | struct ctlr_info *test_h; |
| 3358 | int found = 0; |
| 3359 | int ret = 0; |
| 3360 | |
| 3361 | if (h->busy_initializing) |
| 3362 | return 0; |
| 3363 | |
| 3364 | if (!mutex_trylock(&h->busy_shutting_down)) |
| 3365 | return 0; |
| 3366 | |
| 3367 | mutex_lock(&scan_mutex); |
| 3368 | list_for_each_entry(test_h, &scan_q, scan_list) { |
| 3369 | if (test_h == h) { |
| 3370 | found = 1; |
| 3371 | break; |
| 3372 | } |
| 3373 | } |
| 3374 | if (!found && !h->busy_scanning) { |
| 3375 | INIT_COMPLETION(h->scan_wait); |
| 3376 | list_add_tail(&h->scan_list, &scan_q); |
| 3377 | ret = 1; |
| 3378 | } |
| 3379 | mutex_unlock(&scan_mutex); |
| 3380 | mutex_unlock(&h->busy_shutting_down); |
| 3381 | |
| 3382 | return ret; |
| 3383 | } |
| 3384 | |
| 3385 | /** |
| 3386 | * remove_from_scan_list() - remove controller from rescan queue |
| 3387 | * @h: Pointer to the controller. |
| 3388 | * |
| 3389 | * Removes the controller from the rescan queue if present. Blocks if |
| 3390 | * the controller is currently conducting a rescan. The controller |
| 3391 | * can be in one of three states: |
| 3392 | * 1. Doesn't need a scan |
| 3393 | * 2. On the scan list, but not scanning yet (we remove it) |
| 3394 | * 3. Busy scanning (and not on the list). In this case we want to wait for |
| 3395 | * the scan to complete to make sure the scanning thread for this |
| 3396 | * controller is completely idle. |
| 3397 | **/ |
| 3398 | static void remove_from_scan_list(struct ctlr_info *h) |
| 3399 | { |
| 3400 | struct ctlr_info *test_h, *tmp_h; |
| 3401 | |
| 3402 | mutex_lock(&scan_mutex); |
| 3403 | list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) { |
| 3404 | if (test_h == h) { /* state 2. */ |
| 3405 | list_del(&h->scan_list); |
| 3406 | complete_all(&h->scan_wait); |
| 3407 | mutex_unlock(&scan_mutex); |
| 3408 | return; |
| 3409 | } |
| 3410 | } |
| 3411 | if (h->busy_scanning) { /* state 3. */ |
| 3412 | mutex_unlock(&scan_mutex); |
| 3413 | wait_for_completion(&h->scan_wait); |
| 3414 | } else { /* state 1, nothing to do. */ |
| 3415 | mutex_unlock(&scan_mutex); |
| 3416 | } |
| 3417 | } |
| 3418 | |
| 3419 | /** |
| 3420 | * scan_thread() - kernel thread used to rescan controllers |
| 3421 | * @data: Ignored. |
| 3422 | * |
| 3423 | * A kernel thread used scan for drive topology changes on |
| 3424 | * controllers. The thread processes only one controller at a time |
| 3425 | * using a queue. Controllers are added to the queue using |
| 3426 | * add_to_scan_list() and removed from the queue either after done |
| 3427 | * processing or using remove_from_scan_list(). |
| 3428 | * |
| 3429 | * returns 0. |
| 3430 | **/ |
| 3431 | static int scan_thread(void *data) |
| 3432 | { |
| 3433 | struct ctlr_info *h; |
| 3434 | |
| 3435 | while (1) { |
| 3436 | set_current_state(TASK_INTERRUPTIBLE); |
| 3437 | schedule(); |
| 3438 | if (kthread_should_stop()) |
| 3439 | break; |
| 3440 | |
| 3441 | while (1) { |
| 3442 | mutex_lock(&scan_mutex); |
| 3443 | if (list_empty(&scan_q)) { |
| 3444 | mutex_unlock(&scan_mutex); |
| 3445 | break; |
| 3446 | } |
| 3447 | |
| 3448 | h = list_entry(scan_q.next, |
| 3449 | struct ctlr_info, |
| 3450 | scan_list); |
| 3451 | list_del(&h->scan_list); |
| 3452 | h->busy_scanning = 1; |
| 3453 | mutex_unlock(&scan_mutex); |
| 3454 | |
| 3455 | rebuild_lun_table(h, 0, 0); |
| 3456 | complete_all(&h->scan_wait); |
| 3457 | mutex_lock(&scan_mutex); |
| 3458 | h->busy_scanning = 0; |
| 3459 | mutex_unlock(&scan_mutex); |
| 3460 | } |
| 3461 | } |
| 3462 | |
| 3463 | return 0; |
| 3464 | } |
| 3465 | |
| 3466 | static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c) |
| 3467 | { |
| 3468 | if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) |
| 3469 | return 0; |
| 3470 | |
| 3471 | switch (c->err_info->SenseInfo[12]) { |
| 3472 | case STATE_CHANGED: |
| 3473 | printk(KERN_WARNING "cciss%d: a state change " |
| 3474 | "detected, command retried\n", h->ctlr); |
| 3475 | return 1; |
| 3476 | break; |
| 3477 | case LUN_FAILED: |
| 3478 | printk(KERN_WARNING "cciss%d: LUN failure " |
| 3479 | "detected, action required\n", h->ctlr); |
| 3480 | return 1; |
| 3481 | break; |
| 3482 | case REPORT_LUNS_CHANGED: |
| 3483 | printk(KERN_WARNING "cciss%d: report LUN data " |
| 3484 | "changed\n", h->ctlr); |
| 3485 | /* |
| 3486 | * Here, we could call add_to_scan_list and wake up the scan thread, |
| 3487 | * except that it's quite likely that we will get more than one |
| 3488 | * REPORT_LUNS_CHANGED condition in quick succession, which means |
| 3489 | * that those which occur after the first one will likely happen |
| 3490 | * *during* the scan_thread's rescan. And the rescan code is not |
| 3491 | * robust enough to restart in the middle, undoing what it has already |
| 3492 | * done, and it's not clear that it's even possible to do this, since |
| 3493 | * part of what it does is notify the block layer, which starts |
| 3494 | * doing it's own i/o to read partition tables and so on, and the |
| 3495 | * driver doesn't have visibility to know what might need undoing. |
| 3496 | * In any event, if possible, it is horribly complicated to get right |
| 3497 | * so we just don't do it for now. |
| 3498 | * |
| 3499 | * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012. |
| 3500 | */ |
| 3501 | return 1; |
| 3502 | break; |
| 3503 | case POWER_OR_RESET: |
| 3504 | printk(KERN_WARNING "cciss%d: a power on " |
| 3505 | "or device reset detected\n", h->ctlr); |
| 3506 | return 1; |
| 3507 | break; |
| 3508 | case UNIT_ATTENTION_CLEARED: |
| 3509 | printk(KERN_WARNING "cciss%d: unit attention " |
| 3510 | "cleared by another initiator\n", h->ctlr); |
| 3511 | return 1; |
| 3512 | break; |
| 3513 | default: |
| 3514 | printk(KERN_WARNING "cciss%d: unknown " |
| 3515 | "unit attention detected\n", h->ctlr); |
| 3516 | return 1; |
| 3517 | } |
| 3518 | } |
| 3519 | |
| 3520 | /* |
| 3521 | * We cannot read the structure directly, for portability we must use |
| 3522 | * the io functions. |
| 3523 | * This is for debug only. |
| 3524 | */ |
| 3525 | #ifdef CCISS_DEBUG |
| 3526 | static void print_cfg_table(CfgTable_struct *tb) |
| 3527 | { |
| 3528 | int i; |
| 3529 | char temp_name[17]; |
| 3530 | |
| 3531 | printk("Controller Configuration information\n"); |
| 3532 | printk("------------------------------------\n"); |
| 3533 | for (i = 0; i < 4; i++) |
| 3534 | temp_name[i] = readb(&(tb->Signature[i])); |
| 3535 | temp_name[4] = '\0'; |
| 3536 | printk(" Signature = %s\n", temp_name); |
| 3537 | printk(" Spec Number = %d\n", readl(&(tb->SpecValence))); |
| 3538 | printk(" Transport methods supported = 0x%x\n", |
| 3539 | readl(&(tb->TransportSupport))); |
| 3540 | printk(" Transport methods active = 0x%x\n", |
| 3541 | readl(&(tb->TransportActive))); |
| 3542 | printk(" Requested transport Method = 0x%x\n", |
| 3543 | readl(&(tb->HostWrite.TransportRequest))); |
| 3544 | printk(" Coalesce Interrupt Delay = 0x%x\n", |
| 3545 | readl(&(tb->HostWrite.CoalIntDelay))); |
| 3546 | printk(" Coalesce Interrupt Count = 0x%x\n", |
| 3547 | readl(&(tb->HostWrite.CoalIntCount))); |
| 3548 | printk(" Max outstanding commands = 0x%d\n", |
| 3549 | readl(&(tb->CmdsOutMax))); |
| 3550 | printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes))); |
| 3551 | for (i = 0; i < 16; i++) |
| 3552 | temp_name[i] = readb(&(tb->ServerName[i])); |
| 3553 | temp_name[16] = '\0'; |
| 3554 | printk(" Server Name = %s\n", temp_name); |
| 3555 | printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat))); |
| 3556 | } |
| 3557 | #endif /* CCISS_DEBUG */ |
| 3558 | |
| 3559 | static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) |
| 3560 | { |
| 3561 | int i, offset, mem_type, bar_type; |
| 3562 | if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ |
| 3563 | return 0; |
| 3564 | offset = 0; |
| 3565 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
| 3566 | bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; |
| 3567 | if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) |
| 3568 | offset += 4; |
| 3569 | else { |
| 3570 | mem_type = pci_resource_flags(pdev, i) & |
| 3571 | PCI_BASE_ADDRESS_MEM_TYPE_MASK; |
| 3572 | switch (mem_type) { |
| 3573 | case PCI_BASE_ADDRESS_MEM_TYPE_32: |
| 3574 | case PCI_BASE_ADDRESS_MEM_TYPE_1M: |
| 3575 | offset += 4; /* 32 bit */ |
| 3576 | break; |
| 3577 | case PCI_BASE_ADDRESS_MEM_TYPE_64: |
| 3578 | offset += 8; |
| 3579 | break; |
| 3580 | default: /* reserved in PCI 2.2 */ |
| 3581 | printk(KERN_WARNING |
| 3582 | "Base address is invalid\n"); |
| 3583 | return -1; |
| 3584 | break; |
| 3585 | } |
| 3586 | } |
| 3587 | if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) |
| 3588 | return i + 1; |
| 3589 | } |
| 3590 | return -1; |
| 3591 | } |
| 3592 | |
| 3593 | /* If MSI/MSI-X is supported by the kernel we will try to enable it on |
| 3594 | * controllers that are capable. If not, we use IO-APIC mode. |
| 3595 | */ |
| 3596 | |
| 3597 | static void __devinit cciss_interrupt_mode(ctlr_info_t *c, |
| 3598 | struct pci_dev *pdev, __u32 board_id) |
| 3599 | { |
| 3600 | #ifdef CONFIG_PCI_MSI |
| 3601 | int err; |
| 3602 | struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1}, |
| 3603 | {0, 2}, {0, 3} |
| 3604 | }; |
| 3605 | |
| 3606 | /* Some boards advertise MSI but don't really support it */ |
| 3607 | if ((board_id == 0x40700E11) || |
| 3608 | (board_id == 0x40800E11) || |
| 3609 | (board_id == 0x40820E11) || (board_id == 0x40830E11)) |
| 3610 | goto default_int_mode; |
| 3611 | |
| 3612 | if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) { |
| 3613 | err = pci_enable_msix(pdev, cciss_msix_entries, 4); |
| 3614 | if (!err) { |
| 3615 | c->intr[0] = cciss_msix_entries[0].vector; |
| 3616 | c->intr[1] = cciss_msix_entries[1].vector; |
| 3617 | c->intr[2] = cciss_msix_entries[2].vector; |
| 3618 | c->intr[3] = cciss_msix_entries[3].vector; |
| 3619 | c->msix_vector = 1; |
| 3620 | return; |
| 3621 | } |
| 3622 | if (err > 0) { |
| 3623 | printk(KERN_WARNING "cciss: only %d MSI-X vectors " |
| 3624 | "available\n", err); |
| 3625 | goto default_int_mode; |
| 3626 | } else { |
| 3627 | printk(KERN_WARNING "cciss: MSI-X init failed %d\n", |
| 3628 | err); |
| 3629 | goto default_int_mode; |
| 3630 | } |
| 3631 | } |
| 3632 | if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) { |
| 3633 | if (!pci_enable_msi(pdev)) { |
| 3634 | c->msi_vector = 1; |
| 3635 | } else { |
| 3636 | printk(KERN_WARNING "cciss: MSI init failed\n"); |
| 3637 | } |
| 3638 | } |
| 3639 | default_int_mode: |
| 3640 | #endif /* CONFIG_PCI_MSI */ |
| 3641 | /* if we get here we're going to use the default interrupt mode */ |
| 3642 | c->intr[SIMPLE_MODE_INT] = pdev->irq; |
| 3643 | return; |
| 3644 | } |
| 3645 | |
| 3646 | static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev) |
| 3647 | { |
| 3648 | ushort subsystem_vendor_id, subsystem_device_id, command; |
| 3649 | __u32 board_id, scratchpad = 0; |
| 3650 | __u64 cfg_offset; |
| 3651 | __u32 cfg_base_addr; |
| 3652 | __u64 cfg_base_addr_index; |
| 3653 | int i, prod_index, err; |
| 3654 | |
| 3655 | subsystem_vendor_id = pdev->subsystem_vendor; |
| 3656 | subsystem_device_id = pdev->subsystem_device; |
| 3657 | board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) | |
| 3658 | subsystem_vendor_id); |
| 3659 | |
| 3660 | for (i = 0; i < ARRAY_SIZE(products); i++) { |
| 3661 | /* Stand aside for hpsa driver on request */ |
| 3662 | if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY) |
| 3663 | return -ENODEV; |
| 3664 | if (board_id == products[i].board_id) |
| 3665 | break; |
| 3666 | } |
| 3667 | prod_index = i; |
| 3668 | if (prod_index == ARRAY_SIZE(products)) { |
| 3669 | dev_warn(&pdev->dev, |
| 3670 | "unrecognized board ID: 0x%08lx, ignoring.\n", |
| 3671 | (unsigned long) board_id); |
| 3672 | return -ENODEV; |
| 3673 | } |
| 3674 | |
| 3675 | /* check to see if controller has been disabled */ |
| 3676 | /* BEFORE trying to enable it */ |
| 3677 | (void)pci_read_config_word(pdev, PCI_COMMAND, &command); |
| 3678 | if (!(command & 0x02)) { |
| 3679 | printk(KERN_WARNING |
| 3680 | "cciss: controller appears to be disabled\n"); |
| 3681 | return -ENODEV; |
| 3682 | } |
| 3683 | |
| 3684 | err = pci_enable_device(pdev); |
| 3685 | if (err) { |
| 3686 | printk(KERN_ERR "cciss: Unable to Enable PCI device\n"); |
| 3687 | return err; |
| 3688 | } |
| 3689 | |
| 3690 | err = pci_request_regions(pdev, "cciss"); |
| 3691 | if (err) { |
| 3692 | printk(KERN_ERR "cciss: Cannot obtain PCI resources, " |
| 3693 | "aborting\n"); |
| 3694 | return err; |
| 3695 | } |
| 3696 | |
| 3697 | #ifdef CCISS_DEBUG |
| 3698 | printk("command = %x\n", command); |
| 3699 | printk("irq = %x\n", pdev->irq); |
| 3700 | printk("board_id = %x\n", board_id); |
| 3701 | #endif /* CCISS_DEBUG */ |
| 3702 | |
| 3703 | /* If the kernel supports MSI/MSI-X we will try to enable that functionality, |
| 3704 | * else we use the IO-APIC interrupt assigned to us by system ROM. |
| 3705 | */ |
| 3706 | cciss_interrupt_mode(c, pdev, board_id); |
| 3707 | |
| 3708 | /* find the memory BAR */ |
| 3709 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
| 3710 | if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) |
| 3711 | break; |
| 3712 | } |
| 3713 | if (i == DEVICE_COUNT_RESOURCE) { |
| 3714 | printk(KERN_WARNING "cciss: No memory BAR found\n"); |
| 3715 | err = -ENODEV; |
| 3716 | goto err_out_free_res; |
| 3717 | } |
| 3718 | |
| 3719 | c->paddr = pci_resource_start(pdev, i); /* addressing mode bits |
| 3720 | * already removed |
| 3721 | */ |
| 3722 | |
| 3723 | #ifdef CCISS_DEBUG |
| 3724 | printk("address 0 = %lx\n", c->paddr); |
| 3725 | #endif /* CCISS_DEBUG */ |
| 3726 | c->vaddr = remap_pci_mem(c->paddr, 0x250); |
| 3727 | |
| 3728 | /* Wait for the board to become ready. (PCI hotplug needs this.) |
| 3729 | * We poll for up to 120 secs, once per 100ms. */ |
| 3730 | for (i = 0; i < 1200; i++) { |
| 3731 | scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET); |
| 3732 | if (scratchpad == CCISS_FIRMWARE_READY) |
| 3733 | break; |
| 3734 | set_current_state(TASK_INTERRUPTIBLE); |
| 3735 | schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */ |
| 3736 | } |
| 3737 | if (scratchpad != CCISS_FIRMWARE_READY) { |
| 3738 | printk(KERN_WARNING "cciss: Board not ready. Timed out.\n"); |
| 3739 | err = -ENODEV; |
| 3740 | goto err_out_free_res; |
| 3741 | } |
| 3742 | |
| 3743 | /* get the address index number */ |
| 3744 | cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET); |
| 3745 | cfg_base_addr &= (__u32) 0x0000ffff; |
| 3746 | #ifdef CCISS_DEBUG |
| 3747 | printk("cfg base address = %x\n", cfg_base_addr); |
| 3748 | #endif /* CCISS_DEBUG */ |
| 3749 | cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr); |
| 3750 | #ifdef CCISS_DEBUG |
| 3751 | printk("cfg base address index = %llx\n", |
| 3752 | (unsigned long long)cfg_base_addr_index); |
| 3753 | #endif /* CCISS_DEBUG */ |
| 3754 | if (cfg_base_addr_index == -1) { |
| 3755 | printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n"); |
| 3756 | err = -ENODEV; |
| 3757 | goto err_out_free_res; |
| 3758 | } |
| 3759 | |
| 3760 | cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET); |
| 3761 | #ifdef CCISS_DEBUG |
| 3762 | printk("cfg offset = %llx\n", (unsigned long long)cfg_offset); |
| 3763 | #endif /* CCISS_DEBUG */ |
| 3764 | c->cfgtable = remap_pci_mem(pci_resource_start(pdev, |
| 3765 | cfg_base_addr_index) + |
| 3766 | cfg_offset, sizeof(CfgTable_struct)); |
| 3767 | c->board_id = board_id; |
| 3768 | |
| 3769 | #ifdef CCISS_DEBUG |
| 3770 | print_cfg_table(c->cfgtable); |
| 3771 | #endif /* CCISS_DEBUG */ |
| 3772 | |
| 3773 | /* Some controllers support Zero Memory Raid (ZMR). |
| 3774 | * When configured in ZMR mode the number of supported |
| 3775 | * commands drops to 64. So instead of just setting an |
| 3776 | * arbitrary value we make the driver a little smarter. |
| 3777 | * We read the config table to tell us how many commands |
| 3778 | * are supported on the controller then subtract 4 to |
| 3779 | * leave a little room for ioctl calls. |
| 3780 | */ |
| 3781 | c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); |
| 3782 | c->maxsgentries = readl(&(c->cfgtable->MaxSGElements)); |
| 3783 | |
| 3784 | /* |
| 3785 | * Limit native command to 32 s/g elements to save dma'able memory. |
| 3786 | * Howvever spec says if 0, use 31 |
| 3787 | */ |
| 3788 | |
| 3789 | c->max_cmd_sgentries = 31; |
| 3790 | if (c->maxsgentries > 512) { |
| 3791 | c->max_cmd_sgentries = 32; |
| 3792 | c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1; |
| 3793 | c->maxsgentries -= 1; /* account for chain pointer */ |
| 3794 | } else { |
| 3795 | c->maxsgentries = 31; /* Default to traditional value */ |
| 3796 | c->chainsize = 0; /* traditional */ |
| 3797 | } |
| 3798 | |
| 3799 | c->product_name = products[prod_index].product_name; |
| 3800 | c->access = *(products[prod_index].access); |
| 3801 | c->nr_cmds = c->max_commands - 4; |
| 3802 | if ((readb(&c->cfgtable->Signature[0]) != 'C') || |
| 3803 | (readb(&c->cfgtable->Signature[1]) != 'I') || |
| 3804 | (readb(&c->cfgtable->Signature[2]) != 'S') || |
| 3805 | (readb(&c->cfgtable->Signature[3]) != 'S')) { |
| 3806 | printk("Does not appear to be a valid CISS config table\n"); |
| 3807 | err = -ENODEV; |
| 3808 | goto err_out_free_res; |
| 3809 | } |
| 3810 | #ifdef CONFIG_X86 |
| 3811 | { |
| 3812 | /* Need to enable prefetch in the SCSI core for 6400 in x86 */ |
| 3813 | __u32 prefetch; |
| 3814 | prefetch = readl(&(c->cfgtable->SCSI_Prefetch)); |
| 3815 | prefetch |= 0x100; |
| 3816 | writel(prefetch, &(c->cfgtable->SCSI_Prefetch)); |
| 3817 | } |
| 3818 | #endif |
| 3819 | |
| 3820 | /* Disabling DMA prefetch and refetch for the P600. |
| 3821 | * An ASIC bug may result in accesses to invalid memory addresses. |
| 3822 | * We've disabled prefetch for some time now. Testing with XEN |
| 3823 | * kernels revealed a bug in the refetch if dom0 resides on a P600. |
| 3824 | */ |
| 3825 | if(board_id == 0x3225103C) { |
| 3826 | __u32 dma_prefetch; |
| 3827 | __u32 dma_refetch; |
| 3828 | dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG); |
| 3829 | dma_prefetch |= 0x8000; |
| 3830 | writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG); |
| 3831 | pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch); |
| 3832 | dma_refetch |= 0x1; |
| 3833 | pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch); |
| 3834 | } |
| 3835 | |
| 3836 | #ifdef CCISS_DEBUG |
| 3837 | printk("Trying to put board into Simple mode\n"); |
| 3838 | #endif /* CCISS_DEBUG */ |
| 3839 | c->max_commands = readl(&(c->cfgtable->CmdsOutMax)); |
| 3840 | /* Update the field, and then ring the doorbell */ |
| 3841 | writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest)); |
| 3842 | writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL); |
| 3843 | |
| 3844 | /* under certain very rare conditions, this can take awhile. |
| 3845 | * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right |
| 3846 | * as we enter this code.) */ |
| 3847 | for (i = 0; i < MAX_CONFIG_WAIT; i++) { |
| 3848 | if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) |
| 3849 | break; |
| 3850 | /* delay and try again */ |
| 3851 | set_current_state(TASK_INTERRUPTIBLE); |
| 3852 | schedule_timeout(msecs_to_jiffies(1)); |
| 3853 | } |
| 3854 | |
| 3855 | #ifdef CCISS_DEBUG |
| 3856 | printk(KERN_DEBUG "I counter got to %d %x\n", i, |
| 3857 | readl(c->vaddr + SA5_DOORBELL)); |
| 3858 | #endif /* CCISS_DEBUG */ |
| 3859 | #ifdef CCISS_DEBUG |
| 3860 | print_cfg_table(c->cfgtable); |
| 3861 | #endif /* CCISS_DEBUG */ |
| 3862 | |
| 3863 | if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) { |
| 3864 | printk(KERN_WARNING "cciss: unable to get board into" |
| 3865 | " simple mode\n"); |
| 3866 | err = -ENODEV; |
| 3867 | goto err_out_free_res; |
| 3868 | } |
| 3869 | return 0; |
| 3870 | |
| 3871 | err_out_free_res: |
| 3872 | /* |
| 3873 | * Deliberately omit pci_disable_device(): it does something nasty to |
| 3874 | * Smart Array controllers that pci_enable_device does not undo |
| 3875 | */ |
| 3876 | pci_release_regions(pdev); |
| 3877 | return err; |
| 3878 | } |
| 3879 | |
| 3880 | /* Function to find the first free pointer into our hba[] array |
| 3881 | * Returns -1 if no free entries are left. |
| 3882 | */ |
| 3883 | static int alloc_cciss_hba(void) |
| 3884 | { |
| 3885 | int i; |
| 3886 | |
| 3887 | for (i = 0; i < MAX_CTLR; i++) { |
| 3888 | if (!hba[i]) { |
| 3889 | ctlr_info_t *p; |
| 3890 | |
| 3891 | p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); |
| 3892 | if (!p) |
| 3893 | goto Enomem; |
| 3894 | hba[i] = p; |
| 3895 | return i; |
| 3896 | } |
| 3897 | } |
| 3898 | printk(KERN_WARNING "cciss: This driver supports a maximum" |
| 3899 | " of %d controllers.\n", MAX_CTLR); |
| 3900 | return -1; |
| 3901 | Enomem: |
| 3902 | printk(KERN_ERR "cciss: out of memory.\n"); |
| 3903 | return -1; |
| 3904 | } |
| 3905 | |
| 3906 | static void free_hba(int n) |
| 3907 | { |
| 3908 | ctlr_info_t *h = hba[n]; |
| 3909 | int i; |
| 3910 | |
| 3911 | hba[n] = NULL; |
| 3912 | for (i = 0; i < h->highest_lun + 1; i++) |
| 3913 | if (h->gendisk[i] != NULL) |
| 3914 | put_disk(h->gendisk[i]); |
| 3915 | kfree(h); |
| 3916 | } |
| 3917 | |
| 3918 | /* Send a message CDB to the firmware. */ |
| 3919 | static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) |
| 3920 | { |
| 3921 | typedef struct { |
| 3922 | CommandListHeader_struct CommandHeader; |
| 3923 | RequestBlock_struct Request; |
| 3924 | ErrDescriptor_struct ErrorDescriptor; |
| 3925 | } Command; |
| 3926 | static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); |
| 3927 | Command *cmd; |
| 3928 | dma_addr_t paddr64; |
| 3929 | uint32_t paddr32, tag; |
| 3930 | void __iomem *vaddr; |
| 3931 | int i, err; |
| 3932 | |
| 3933 | vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); |
| 3934 | if (vaddr == NULL) |
| 3935 | return -ENOMEM; |
| 3936 | |
| 3937 | /* The Inbound Post Queue only accepts 32-bit physical addresses for the |
| 3938 | CCISS commands, so they must be allocated from the lower 4GiB of |
| 3939 | memory. */ |
| 3940 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 3941 | if (err) { |
| 3942 | iounmap(vaddr); |
| 3943 | return -ENOMEM; |
| 3944 | } |
| 3945 | |
| 3946 | cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); |
| 3947 | if (cmd == NULL) { |
| 3948 | iounmap(vaddr); |
| 3949 | return -ENOMEM; |
| 3950 | } |
| 3951 | |
| 3952 | /* This must fit, because of the 32-bit consistent DMA mask. Also, |
| 3953 | although there's no guarantee, we assume that the address is at |
| 3954 | least 4-byte aligned (most likely, it's page-aligned). */ |
| 3955 | paddr32 = paddr64; |
| 3956 | |
| 3957 | cmd->CommandHeader.ReplyQueue = 0; |
| 3958 | cmd->CommandHeader.SGList = 0; |
| 3959 | cmd->CommandHeader.SGTotal = 0; |
| 3960 | cmd->CommandHeader.Tag.lower = paddr32; |
| 3961 | cmd->CommandHeader.Tag.upper = 0; |
| 3962 | memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); |
| 3963 | |
| 3964 | cmd->Request.CDBLen = 16; |
| 3965 | cmd->Request.Type.Type = TYPE_MSG; |
| 3966 | cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; |
| 3967 | cmd->Request.Type.Direction = XFER_NONE; |
| 3968 | cmd->Request.Timeout = 0; /* Don't time out */ |
| 3969 | cmd->Request.CDB[0] = opcode; |
| 3970 | cmd->Request.CDB[1] = type; |
| 3971 | memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ |
| 3972 | |
| 3973 | cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); |
| 3974 | cmd->ErrorDescriptor.Addr.upper = 0; |
| 3975 | cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); |
| 3976 | |
| 3977 | writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); |
| 3978 | |
| 3979 | for (i = 0; i < 10; i++) { |
| 3980 | tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); |
| 3981 | if ((tag & ~3) == paddr32) |
| 3982 | break; |
| 3983 | schedule_timeout_uninterruptible(HZ); |
| 3984 | } |
| 3985 | |
| 3986 | iounmap(vaddr); |
| 3987 | |
| 3988 | /* we leak the DMA buffer here ... no choice since the controller could |
| 3989 | still complete the command. */ |
| 3990 | if (i == 10) { |
| 3991 | printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n", |
| 3992 | opcode, type); |
| 3993 | return -ETIMEDOUT; |
| 3994 | } |
| 3995 | |
| 3996 | pci_free_consistent(pdev, cmd_sz, cmd, paddr64); |
| 3997 | |
| 3998 | if (tag & 2) { |
| 3999 | printk(KERN_ERR "cciss: controller message %02x:%02x failed\n", |
| 4000 | opcode, type); |
| 4001 | return -EIO; |
| 4002 | } |
| 4003 | |
| 4004 | printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n", |
| 4005 | opcode, type); |
| 4006 | return 0; |
| 4007 | } |
| 4008 | |
| 4009 | #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0) |
| 4010 | #define cciss_noop(p) cciss_message(p, 3, 0) |
| 4011 | |
| 4012 | static __devinit int cciss_reset_msi(struct pci_dev *pdev) |
| 4013 | { |
| 4014 | /* the #defines are stolen from drivers/pci/msi.h. */ |
| 4015 | #define msi_control_reg(base) (base + PCI_MSI_FLAGS) |
| 4016 | #define PCI_MSIX_FLAGS_ENABLE (1 << 15) |
| 4017 | |
| 4018 | int pos; |
| 4019 | u16 control = 0; |
| 4020 | |
| 4021 | pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); |
| 4022 | if (pos) { |
| 4023 | pci_read_config_word(pdev, msi_control_reg(pos), &control); |
| 4024 | if (control & PCI_MSI_FLAGS_ENABLE) { |
| 4025 | printk(KERN_INFO "cciss: resetting MSI\n"); |
| 4026 | pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE); |
| 4027 | } |
| 4028 | } |
| 4029 | |
| 4030 | pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); |
| 4031 | if (pos) { |
| 4032 | pci_read_config_word(pdev, msi_control_reg(pos), &control); |
| 4033 | if (control & PCI_MSIX_FLAGS_ENABLE) { |
| 4034 | printk(KERN_INFO "cciss: resetting MSI-X\n"); |
| 4035 | pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE); |
| 4036 | } |
| 4037 | } |
| 4038 | |
| 4039 | return 0; |
| 4040 | } |
| 4041 | |
| 4042 | /* This does a hard reset of the controller using PCI power management |
| 4043 | * states. */ |
| 4044 | static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev) |
| 4045 | { |
| 4046 | u16 pmcsr, saved_config_space[32]; |
| 4047 | int i, pos; |
| 4048 | |
| 4049 | printk(KERN_INFO "cciss: using PCI PM to reset controller\n"); |
| 4050 | |
| 4051 | /* This is very nearly the same thing as |
| 4052 | |
| 4053 | pci_save_state(pci_dev); |
| 4054 | pci_set_power_state(pci_dev, PCI_D3hot); |
| 4055 | pci_set_power_state(pci_dev, PCI_D0); |
| 4056 | pci_restore_state(pci_dev); |
| 4057 | |
| 4058 | but we can't use these nice canned kernel routines on |
| 4059 | kexec, because they also check the MSI/MSI-X state in PCI |
| 4060 | configuration space and do the wrong thing when it is |
| 4061 | set/cleared. Also, the pci_save/restore_state functions |
| 4062 | violate the ordering requirements for restoring the |
| 4063 | configuration space from the CCISS document (see the |
| 4064 | comment below). So we roll our own .... */ |
| 4065 | |
| 4066 | for (i = 0; i < 32; i++) |
| 4067 | pci_read_config_word(pdev, 2*i, &saved_config_space[i]); |
| 4068 | |
| 4069 | pos = pci_find_capability(pdev, PCI_CAP_ID_PM); |
| 4070 | if (pos == 0) { |
| 4071 | printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n"); |
| 4072 | return -ENODEV; |
| 4073 | } |
| 4074 | |
| 4075 | /* Quoting from the Open CISS Specification: "The Power |
| 4076 | * Management Control/Status Register (CSR) controls the power |
| 4077 | * state of the device. The normal operating state is D0, |
| 4078 | * CSR=00h. The software off state is D3, CSR=03h. To reset |
| 4079 | * the controller, place the interface device in D3 then to |
| 4080 | * D0, this causes a secondary PCI reset which will reset the |
| 4081 | * controller." */ |
| 4082 | |
| 4083 | /* enter the D3hot power management state */ |
| 4084 | pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); |
| 4085 | pmcsr &= ~PCI_PM_CTRL_STATE_MASK; |
| 4086 | pmcsr |= PCI_D3hot; |
| 4087 | pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); |
| 4088 | |
| 4089 | schedule_timeout_uninterruptible(HZ >> 1); |
| 4090 | |
| 4091 | /* enter the D0 power management state */ |
| 4092 | pmcsr &= ~PCI_PM_CTRL_STATE_MASK; |
| 4093 | pmcsr |= PCI_D0; |
| 4094 | pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); |
| 4095 | |
| 4096 | schedule_timeout_uninterruptible(HZ >> 1); |
| 4097 | |
| 4098 | /* Restore the PCI configuration space. The Open CISS |
| 4099 | * Specification says, "Restore the PCI Configuration |
| 4100 | * Registers, offsets 00h through 60h. It is important to |
| 4101 | * restore the command register, 16-bits at offset 04h, |
| 4102 | * last. Do not restore the configuration status register, |
| 4103 | * 16-bits at offset 06h." Note that the offset is 2*i. */ |
| 4104 | for (i = 0; i < 32; i++) { |
| 4105 | if (i == 2 || i == 3) |
| 4106 | continue; |
| 4107 | pci_write_config_word(pdev, 2*i, saved_config_space[i]); |
| 4108 | } |
| 4109 | wmb(); |
| 4110 | pci_write_config_word(pdev, 4, saved_config_space[2]); |
| 4111 | |
| 4112 | return 0; |
| 4113 | } |
| 4114 | |
| 4115 | /* |
| 4116 | * This is it. Find all the controllers and register them. I really hate |
| 4117 | * stealing all these major device numbers. |
| 4118 | * returns the number of block devices registered. |
| 4119 | */ |
| 4120 | static int __devinit cciss_init_one(struct pci_dev *pdev, |
| 4121 | const struct pci_device_id *ent) |
| 4122 | { |
| 4123 | int i; |
| 4124 | int j = 0; |
| 4125 | int k = 0; |
| 4126 | int rc; |
| 4127 | int dac, return_code; |
| 4128 | InquiryData_struct *inq_buff; |
| 4129 | |
| 4130 | if (reset_devices) { |
| 4131 | /* Reset the controller with a PCI power-cycle */ |
| 4132 | if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev)) |
| 4133 | return -ENODEV; |
| 4134 | |
| 4135 | /* Now try to get the controller to respond to a no-op. Some |
| 4136 | devices (notably the HP Smart Array 5i Controller) need |
| 4137 | up to 30 seconds to respond. */ |
| 4138 | for (i=0; i<30; i++) { |
| 4139 | if (cciss_noop(pdev) == 0) |
| 4140 | break; |
| 4141 | |
| 4142 | schedule_timeout_uninterruptible(HZ); |
| 4143 | } |
| 4144 | if (i == 30) { |
| 4145 | printk(KERN_ERR "cciss: controller seems dead\n"); |
| 4146 | return -EBUSY; |
| 4147 | } |
| 4148 | } |
| 4149 | |
| 4150 | i = alloc_cciss_hba(); |
| 4151 | if (i < 0) |
| 4152 | return -1; |
| 4153 | |
| 4154 | hba[i]->busy_initializing = 1; |
| 4155 | INIT_HLIST_HEAD(&hba[i]->cmpQ); |
| 4156 | INIT_HLIST_HEAD(&hba[i]->reqQ); |
| 4157 | mutex_init(&hba[i]->busy_shutting_down); |
| 4158 | |
| 4159 | if (cciss_pci_init(hba[i], pdev) != 0) |
| 4160 | goto clean_no_release_regions; |
| 4161 | |
| 4162 | sprintf(hba[i]->devname, "cciss%d", i); |
| 4163 | hba[i]->ctlr = i; |
| 4164 | hba[i]->pdev = pdev; |
| 4165 | |
| 4166 | init_completion(&hba[i]->scan_wait); |
| 4167 | |
| 4168 | if (cciss_create_hba_sysfs_entry(hba[i])) |
| 4169 | goto clean0; |
| 4170 | |
| 4171 | /* configure PCI DMA stuff */ |
| 4172 | if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) |
| 4173 | dac = 1; |
| 4174 | else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) |
| 4175 | dac = 0; |
| 4176 | else { |
| 4177 | printk(KERN_ERR "cciss: no suitable DMA available\n"); |
| 4178 | goto clean1; |
| 4179 | } |
| 4180 | |
| 4181 | /* |
| 4182 | * register with the major number, or get a dynamic major number |
| 4183 | * by passing 0 as argument. This is done for greater than |
| 4184 | * 8 controller support. |
| 4185 | */ |
| 4186 | if (i < MAX_CTLR_ORIG) |
| 4187 | hba[i]->major = COMPAQ_CISS_MAJOR + i; |
| 4188 | rc = register_blkdev(hba[i]->major, hba[i]->devname); |
| 4189 | if (rc == -EBUSY || rc == -EINVAL) { |
| 4190 | printk(KERN_ERR |
| 4191 | "cciss: Unable to get major number %d for %s " |
| 4192 | "on hba %d\n", hba[i]->major, hba[i]->devname, i); |
| 4193 | goto clean1; |
| 4194 | } else { |
| 4195 | if (i >= MAX_CTLR_ORIG) |
| 4196 | hba[i]->major = rc; |
| 4197 | } |
| 4198 | |
| 4199 | /* make sure the board interrupts are off */ |
| 4200 | hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF); |
| 4201 | if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr, |
| 4202 | IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) { |
| 4203 | printk(KERN_ERR "cciss: Unable to get irq %d for %s\n", |
| 4204 | hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname); |
| 4205 | goto clean2; |
| 4206 | } |
| 4207 | |
| 4208 | printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n", |
| 4209 | hba[i]->devname, pdev->device, pci_name(pdev), |
| 4210 | hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not"); |
| 4211 | |
| 4212 | hba[i]->cmd_pool_bits = |
| 4213 | kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) |
| 4214 | * sizeof(unsigned long), GFP_KERNEL); |
| 4215 | hba[i]->cmd_pool = (CommandList_struct *) |
| 4216 | pci_alloc_consistent(hba[i]->pdev, |
| 4217 | hba[i]->nr_cmds * sizeof(CommandList_struct), |
| 4218 | &(hba[i]->cmd_pool_dhandle)); |
| 4219 | hba[i]->errinfo_pool = (ErrorInfo_struct *) |
| 4220 | pci_alloc_consistent(hba[i]->pdev, |
| 4221 | hba[i]->nr_cmds * sizeof(ErrorInfo_struct), |
| 4222 | &(hba[i]->errinfo_pool_dhandle)); |
| 4223 | if ((hba[i]->cmd_pool_bits == NULL) |
| 4224 | || (hba[i]->cmd_pool == NULL) |
| 4225 | || (hba[i]->errinfo_pool == NULL)) { |
| 4226 | printk(KERN_ERR "cciss: out of memory"); |
| 4227 | goto clean4; |
| 4228 | } |
| 4229 | |
| 4230 | /* Need space for temp scatter list */ |
| 4231 | hba[i]->scatter_list = kmalloc(hba[i]->max_commands * |
| 4232 | sizeof(struct scatterlist *), |
| 4233 | GFP_KERNEL); |
| 4234 | for (k = 0; k < hba[i]->nr_cmds; k++) { |
| 4235 | hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) * |
| 4236 | hba[i]->maxsgentries, |
| 4237 | GFP_KERNEL); |
| 4238 | if (hba[i]->scatter_list[k] == NULL) { |
| 4239 | printk(KERN_ERR "cciss%d: could not allocate " |
| 4240 | "s/g lists\n", i); |
| 4241 | goto clean4; |
| 4242 | } |
| 4243 | } |
| 4244 | hba[i]->cmd_sg_list = kmalloc(sizeof(struct Cmd_sg_list *) * |
| 4245 | hba[i]->nr_cmds, |
| 4246 | GFP_KERNEL); |
| 4247 | if (!hba[i]->cmd_sg_list) { |
| 4248 | printk(KERN_ERR "cciss%d: Cannot get memory for " |
| 4249 | "s/g chaining.\n", i); |
| 4250 | goto clean4; |
| 4251 | } |
| 4252 | /* Build up chain blocks for each command */ |
| 4253 | if (hba[i]->chainsize > 0) { |
| 4254 | for (j = 0; j < hba[i]->nr_cmds; j++) { |
| 4255 | hba[i]->cmd_sg_list[j] = |
| 4256 | kmalloc(sizeof(struct Cmd_sg_list), |
| 4257 | GFP_KERNEL); |
| 4258 | if (!hba[i]->cmd_sg_list[j]) { |
| 4259 | printk(KERN_ERR "cciss%d: Cannot get memory " |
| 4260 | "for chain block.\n", i); |
| 4261 | goto clean4; |
| 4262 | } |
| 4263 | /* Need a block of chainsized s/g elements. */ |
| 4264 | hba[i]->cmd_sg_list[j]->sgchain = |
| 4265 | kmalloc((hba[i]->chainsize * |
| 4266 | sizeof(SGDescriptor_struct)), |
| 4267 | GFP_KERNEL); |
| 4268 | if (!hba[i]->cmd_sg_list[j]->sgchain) { |
| 4269 | printk(KERN_ERR "cciss%d: Cannot get memory " |
| 4270 | "for s/g chains\n", i); |
| 4271 | goto clean4; |
| 4272 | } |
| 4273 | } |
| 4274 | } |
| 4275 | |
| 4276 | spin_lock_init(&hba[i]->lock); |
| 4277 | |
| 4278 | /* Initialize the pdev driver private data. |
| 4279 | have it point to hba[i]. */ |
| 4280 | pci_set_drvdata(pdev, hba[i]); |
| 4281 | /* command and error info recs zeroed out before |
| 4282 | they are used */ |
| 4283 | memset(hba[i]->cmd_pool_bits, 0, |
| 4284 | DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG) |
| 4285 | * sizeof(unsigned long)); |
| 4286 | |
| 4287 | hba[i]->num_luns = 0; |
| 4288 | hba[i]->highest_lun = -1; |
| 4289 | for (j = 0; j < CISS_MAX_LUN; j++) { |
| 4290 | hba[i]->drv[j] = NULL; |
| 4291 | hba[i]->gendisk[j] = NULL; |
| 4292 | } |
| 4293 | |
| 4294 | cciss_scsi_setup(i); |
| 4295 | |
| 4296 | /* Turn the interrupts on so we can service requests */ |
| 4297 | hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON); |
| 4298 | |
| 4299 | /* Get the firmware version */ |
| 4300 | inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); |
| 4301 | if (inq_buff == NULL) { |
| 4302 | printk(KERN_ERR "cciss: out of memory\n"); |
| 4303 | goto clean4; |
| 4304 | } |
| 4305 | |
| 4306 | return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff, |
| 4307 | sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD); |
| 4308 | if (return_code == IO_OK) { |
| 4309 | hba[i]->firm_ver[0] = inq_buff->data_byte[32]; |
| 4310 | hba[i]->firm_ver[1] = inq_buff->data_byte[33]; |
| 4311 | hba[i]->firm_ver[2] = inq_buff->data_byte[34]; |
| 4312 | hba[i]->firm_ver[3] = inq_buff->data_byte[35]; |
| 4313 | } else { /* send command failed */ |
| 4314 | printk(KERN_WARNING "cciss: unable to determine firmware" |
| 4315 | " version of controller\n"); |
| 4316 | } |
| 4317 | kfree(inq_buff); |
| 4318 | |
| 4319 | cciss_procinit(i); |
| 4320 | |
| 4321 | hba[i]->cciss_max_sectors = 8192; |
| 4322 | |
| 4323 | rebuild_lun_table(hba[i], 1, 0); |
| 4324 | hba[i]->busy_initializing = 0; |
| 4325 | return 1; |
| 4326 | |
| 4327 | clean4: |
| 4328 | kfree(hba[i]->cmd_pool_bits); |
| 4329 | /* Free up sg elements */ |
| 4330 | for (k = 0; k < hba[i]->nr_cmds; k++) |
| 4331 | kfree(hba[i]->scatter_list[k]); |
| 4332 | kfree(hba[i]->scatter_list); |
| 4333 | /* Only free up extra s/g lists if controller supports them */ |
| 4334 | if (hba[i]->chainsize > 0) { |
| 4335 | for (j = 0; j < hba[i]->nr_cmds; j++) { |
| 4336 | if (hba[i]->cmd_sg_list[j]) { |
| 4337 | kfree(hba[i]->cmd_sg_list[j]->sgchain); |
| 4338 | kfree(hba[i]->cmd_sg_list[j]); |
| 4339 | } |
| 4340 | } |
| 4341 | kfree(hba[i]->cmd_sg_list); |
| 4342 | } |
| 4343 | if (hba[i]->cmd_pool) |
| 4344 | pci_free_consistent(hba[i]->pdev, |
| 4345 | hba[i]->nr_cmds * sizeof(CommandList_struct), |
| 4346 | hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); |
| 4347 | if (hba[i]->errinfo_pool) |
| 4348 | pci_free_consistent(hba[i]->pdev, |
| 4349 | hba[i]->nr_cmds * sizeof(ErrorInfo_struct), |
| 4350 | hba[i]->errinfo_pool, |
| 4351 | hba[i]->errinfo_pool_dhandle); |
| 4352 | free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]); |
| 4353 | clean2: |
| 4354 | unregister_blkdev(hba[i]->major, hba[i]->devname); |
| 4355 | clean1: |
| 4356 | cciss_destroy_hba_sysfs_entry(hba[i]); |
| 4357 | clean0: |
| 4358 | pci_release_regions(pdev); |
| 4359 | clean_no_release_regions: |
| 4360 | hba[i]->busy_initializing = 0; |
| 4361 | |
| 4362 | /* |
| 4363 | * Deliberately omit pci_disable_device(): it does something nasty to |
| 4364 | * Smart Array controllers that pci_enable_device does not undo |
| 4365 | */ |
| 4366 | pci_set_drvdata(pdev, NULL); |
| 4367 | free_hba(i); |
| 4368 | return -1; |
| 4369 | } |
| 4370 | |
| 4371 | static void cciss_shutdown(struct pci_dev *pdev) |
| 4372 | { |
| 4373 | ctlr_info_t *h; |
| 4374 | char *flush_buf; |
| 4375 | int return_code; |
| 4376 | |
| 4377 | h = pci_get_drvdata(pdev); |
| 4378 | flush_buf = kzalloc(4, GFP_KERNEL); |
| 4379 | if (!flush_buf) { |
| 4380 | printk(KERN_WARNING |
| 4381 | "cciss:%d cache not flushed, out of memory.\n", |
| 4382 | h->ctlr); |
| 4383 | return; |
| 4384 | } |
| 4385 | /* write all data in the battery backed cache to disk */ |
| 4386 | memset(flush_buf, 0, 4); |
| 4387 | return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf, |
| 4388 | 4, 0, CTLR_LUNID, TYPE_CMD); |
| 4389 | kfree(flush_buf); |
| 4390 | if (return_code != IO_OK) |
| 4391 | printk(KERN_WARNING "cciss%d: Error flushing cache\n", |
| 4392 | h->ctlr); |
| 4393 | h->access.set_intr_mask(h, CCISS_INTR_OFF); |
| 4394 | free_irq(h->intr[2], h); |
| 4395 | } |
| 4396 | |
| 4397 | static void __devexit cciss_remove_one(struct pci_dev *pdev) |
| 4398 | { |
| 4399 | ctlr_info_t *tmp_ptr; |
| 4400 | int i, j; |
| 4401 | |
| 4402 | if (pci_get_drvdata(pdev) == NULL) { |
| 4403 | printk(KERN_ERR "cciss: Unable to remove device \n"); |
| 4404 | return; |
| 4405 | } |
| 4406 | |
| 4407 | tmp_ptr = pci_get_drvdata(pdev); |
| 4408 | i = tmp_ptr->ctlr; |
| 4409 | if (hba[i] == NULL) { |
| 4410 | printk(KERN_ERR "cciss: device appears to " |
| 4411 | "already be removed \n"); |
| 4412 | return; |
| 4413 | } |
| 4414 | |
| 4415 | mutex_lock(&hba[i]->busy_shutting_down); |
| 4416 | |
| 4417 | remove_from_scan_list(hba[i]); |
| 4418 | remove_proc_entry(hba[i]->devname, proc_cciss); |
| 4419 | unregister_blkdev(hba[i]->major, hba[i]->devname); |
| 4420 | |
| 4421 | /* remove it from the disk list */ |
| 4422 | for (j = 0; j < CISS_MAX_LUN; j++) { |
| 4423 | struct gendisk *disk = hba[i]->gendisk[j]; |
| 4424 | if (disk) { |
| 4425 | struct request_queue *q = disk->queue; |
| 4426 | |
| 4427 | if (disk->flags & GENHD_FL_UP) { |
| 4428 | cciss_destroy_ld_sysfs_entry(hba[i], j, 1); |
| 4429 | del_gendisk(disk); |
| 4430 | } |
| 4431 | if (q) |
| 4432 | blk_cleanup_queue(q); |
| 4433 | } |
| 4434 | } |
| 4435 | |
| 4436 | #ifdef CONFIG_CISS_SCSI_TAPE |
| 4437 | cciss_unregister_scsi(i); /* unhook from SCSI subsystem */ |
| 4438 | #endif |
| 4439 | |
| 4440 | cciss_shutdown(pdev); |
| 4441 | |
| 4442 | #ifdef CONFIG_PCI_MSI |
| 4443 | if (hba[i]->msix_vector) |
| 4444 | pci_disable_msix(hba[i]->pdev); |
| 4445 | else if (hba[i]->msi_vector) |
| 4446 | pci_disable_msi(hba[i]->pdev); |
| 4447 | #endif /* CONFIG_PCI_MSI */ |
| 4448 | |
| 4449 | iounmap(hba[i]->vaddr); |
| 4450 | |
| 4451 | pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct), |
| 4452 | hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle); |
| 4453 | pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct), |
| 4454 | hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle); |
| 4455 | kfree(hba[i]->cmd_pool_bits); |
| 4456 | /* Free up sg elements */ |
| 4457 | for (j = 0; j < hba[i]->nr_cmds; j++) |
| 4458 | kfree(hba[i]->scatter_list[j]); |
| 4459 | kfree(hba[i]->scatter_list); |
| 4460 | /* Only free up extra s/g lists if controller supports them */ |
| 4461 | if (hba[i]->chainsize > 0) { |
| 4462 | for (j = 0; j < hba[i]->nr_cmds; j++) { |
| 4463 | if (hba[i]->cmd_sg_list[j]) { |
| 4464 | kfree(hba[i]->cmd_sg_list[j]->sgchain); |
| 4465 | kfree(hba[i]->cmd_sg_list[j]); |
| 4466 | } |
| 4467 | } |
| 4468 | kfree(hba[i]->cmd_sg_list); |
| 4469 | } |
| 4470 | /* |
| 4471 | * Deliberately omit pci_disable_device(): it does something nasty to |
| 4472 | * Smart Array controllers that pci_enable_device does not undo |
| 4473 | */ |
| 4474 | pci_release_regions(pdev); |
| 4475 | pci_set_drvdata(pdev, NULL); |
| 4476 | cciss_destroy_hba_sysfs_entry(hba[i]); |
| 4477 | mutex_unlock(&hba[i]->busy_shutting_down); |
| 4478 | free_hba(i); |
| 4479 | } |
| 4480 | |
| 4481 | static struct pci_driver cciss_pci_driver = { |
| 4482 | .name = "cciss", |
| 4483 | .probe = cciss_init_one, |
| 4484 | .remove = __devexit_p(cciss_remove_one), |
| 4485 | .id_table = cciss_pci_device_id, /* id_table */ |
| 4486 | .shutdown = cciss_shutdown, |
| 4487 | }; |
| 4488 | |
| 4489 | /* |
| 4490 | * This is it. Register the PCI driver information for the cards we control |
| 4491 | * the OS will call our registered routines when it finds one of our cards. |
| 4492 | */ |
| 4493 | static int __init cciss_init(void) |
| 4494 | { |
| 4495 | int err; |
| 4496 | |
| 4497 | /* |
| 4498 | * The hardware requires that commands are aligned on a 64-bit |
| 4499 | * boundary. Given that we use pci_alloc_consistent() to allocate an |
| 4500 | * array of them, the size must be a multiple of 8 bytes. |
| 4501 | */ |
| 4502 | BUILD_BUG_ON(sizeof(CommandList_struct) % 8); |
| 4503 | |
| 4504 | printk(KERN_INFO DRIVER_NAME "\n"); |
| 4505 | |
| 4506 | err = bus_register(&cciss_bus_type); |
| 4507 | if (err) |
| 4508 | return err; |
| 4509 | |
| 4510 | /* Start the scan thread */ |
| 4511 | cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan"); |
| 4512 | if (IS_ERR(cciss_scan_thread)) { |
| 4513 | err = PTR_ERR(cciss_scan_thread); |
| 4514 | goto err_bus_unregister; |
| 4515 | } |
| 4516 | |
| 4517 | /* Register for our PCI devices */ |
| 4518 | err = pci_register_driver(&cciss_pci_driver); |
| 4519 | if (err) |
| 4520 | goto err_thread_stop; |
| 4521 | |
| 4522 | return err; |
| 4523 | |
| 4524 | err_thread_stop: |
| 4525 | kthread_stop(cciss_scan_thread); |
| 4526 | err_bus_unregister: |
| 4527 | bus_unregister(&cciss_bus_type); |
| 4528 | |
| 4529 | return err; |
| 4530 | } |
| 4531 | |
| 4532 | static void __exit cciss_cleanup(void) |
| 4533 | { |
| 4534 | int i; |
| 4535 | |
| 4536 | pci_unregister_driver(&cciss_pci_driver); |
| 4537 | /* double check that all controller entrys have been removed */ |
| 4538 | for (i = 0; i < MAX_CTLR; i++) { |
| 4539 | if (hba[i] != NULL) { |
| 4540 | printk(KERN_WARNING "cciss: had to remove" |
| 4541 | " controller %d\n", i); |
| 4542 | cciss_remove_one(hba[i]->pdev); |
| 4543 | } |
| 4544 | } |
| 4545 | kthread_stop(cciss_scan_thread); |
| 4546 | remove_proc_entry("driver/cciss", NULL); |
| 4547 | bus_unregister(&cciss_bus_type); |
| 4548 | } |
| 4549 | |
| 4550 | static void fail_all_cmds(unsigned long ctlr) |
| 4551 | { |
| 4552 | /* If we get here, the board is apparently dead. */ |
| 4553 | ctlr_info_t *h = hba[ctlr]; |
| 4554 | CommandList_struct *c; |
| 4555 | unsigned long flags; |
| 4556 | |
| 4557 | printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr); |
| 4558 | h->alive = 0; /* the controller apparently died... */ |
| 4559 | |
| 4560 | spin_lock_irqsave(CCISS_LOCK(ctlr), flags); |
| 4561 | |
| 4562 | pci_disable_device(h->pdev); /* Make sure it is really dead. */ |
| 4563 | |
| 4564 | /* move everything off the request queue onto the completed queue */ |
| 4565 | while (!hlist_empty(&h->reqQ)) { |
| 4566 | c = hlist_entry(h->reqQ.first, CommandList_struct, list); |
| 4567 | removeQ(c); |
| 4568 | h->Qdepth--; |
| 4569 | addQ(&h->cmpQ, c); |
| 4570 | } |
| 4571 | |
| 4572 | /* Now, fail everything on the completed queue with a HW error */ |
| 4573 | while (!hlist_empty(&h->cmpQ)) { |
| 4574 | c = hlist_entry(h->cmpQ.first, CommandList_struct, list); |
| 4575 | removeQ(c); |
| 4576 | if (c->cmd_type != CMD_MSG_STALE) |
| 4577 | c->err_info->CommandStatus = CMD_HARDWARE_ERR; |
| 4578 | if (c->cmd_type == CMD_RWREQ) { |
| 4579 | complete_command(h, c, 0); |
| 4580 | } else if (c->cmd_type == CMD_IOCTL_PEND) |
| 4581 | complete(c->waiting); |
| 4582 | #ifdef CONFIG_CISS_SCSI_TAPE |
| 4583 | else if (c->cmd_type == CMD_SCSI) |
| 4584 | complete_scsi_command(c, 0, 0); |
| 4585 | #endif |
| 4586 | } |
| 4587 | spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); |
| 4588 | return; |
| 4589 | } |
| 4590 | |
| 4591 | module_init(cciss_init); |
| 4592 | module_exit(cciss_cleanup); |