projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NBD: allow hung network I/O to be cancelled
[deliverable/linux.git] / drivers / block / cciss.c
CommitLineData
1da177e4
LT		 1/*
2 * Disk Array driver for HP SA 5xxx and 6xxx Controllers
fb86a35b 3 * Copyright 2000, 2006 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 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; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13 * NON INFRINGEMENT. See the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 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/delay.h>
30#include <linux/major.h>
31#include <linux/fs.h>
32#include <linux/bio.h>
33#include <linux/blkpg.h>
34#include <linux/timer.h>
35#include <linux/proc_fs.h>
7c832835 36#include <linux/init.h>
1da177e4
LT		 37#include <linux/hdreg.h>
38#include <linux/spinlock.h>
39#include <linux/compat.h>
2056a782 40#include <linux/blktrace_api.h>
1da177e4
LT		 41#include <asm/uaccess.h>
42#include <asm/io.h>
43
eb0df996 44#include <linux/dma-mapping.h>
1da177e4
LT		 45#include <linux/blkdev.h>
46#include <linux/genhd.h>
47#include <linux/completion.h>
d5d3b736 48#include <scsi/scsi.h>
03bbfee5
MMOD		 49#include <scsi/sg.h>
50#include <scsi/scsi_ioctl.h>
51#include <linux/cdrom.h>
1da177e4
LT		 52
53#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
9d827c9e
MM		 54#define DRIVER_NAME "HP CISS Driver (v 3.6.14)"
55#define DRIVER_VERSION CCISS_DRIVER_VERSION(3,6,14)
1da177e4
LT		 56
57/* Embedded module documentation macros - see modules.h */
58MODULE_AUTHOR("Hewlett-Packard Company");
9d827c9e 59MODULE_DESCRIPTION("Driver for HP Controller SA5xxx SA6xxx version 3.6.14");
1da177e4 60MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
1883c5ab 61 " SA6i P600 P800 P400 P400i E200 E200i E500");
9d827c9e 62MODULE_VERSION("3.6.14");
1da177e4
LT		 63MODULE_LICENSE("GPL");
64
65#include "cciss_cmd.h"
66#include "cciss.h"
67#include <linux/cciss_ioctl.h>
68
69/* define the PCI info for the cards we can control */
70static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 71 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
72 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
73 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
74 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
75 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
76 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
80 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
81 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
82 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
83 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
84 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
4ff9a9a4
MM		 91 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
92 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 93 {0,}
94};
7c832835 95
1da177e4
LT		 96MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
97
1da177e4
LT		 98/* board_id = Subsystem Device ID & Vendor ID
99 * product = Marketing Name for the board
7c832835 100 * access = Address of the struct of function pointers
f880632f 101 * nr_cmds = Number of commands supported by controller
1da177e4
LT		 102 */
103static struct board_type products[] = {
f880632f
MM		 104 {0x40700E11, "Smart Array 5300", &SA5_access, 512},
105 {0x40800E11, "Smart Array 5i", &SA5B_access, 512},
106 {0x40820E11, "Smart Array 532", &SA5B_access, 512},
107 {0x40830E11, "Smart Array 5312", &SA5B_access, 512},
108 {0x409A0E11, "Smart Array 641", &SA5_access, 512},
109 {0x409B0E11, "Smart Array 642", &SA5_access, 512},
110 {0x409C0E11, "Smart Array 6400", &SA5_access, 512},
111 {0x409D0E11, "Smart Array 6400 EM", &SA5_access, 512},
112 {0x40910E11, "Smart Array 6i", &SA5_access, 512},
113 {0x3225103C, "Smart Array P600", &SA5_access, 512},
114 {0x3223103C, "Smart Array P800", &SA5_access, 512},
115 {0x3234103C, "Smart Array P400", &SA5_access, 512},
116 {0x3235103C, "Smart Array P400i", &SA5_access, 512},
117 {0x3211103C, "Smart Array E200i", &SA5_access, 120},
118 {0x3212103C, "Smart Array E200", &SA5_access, 120},
119 {0x3213103C, "Smart Array E200i", &SA5_access, 120},
120 {0x3214103C, "Smart Array E200i", &SA5_access, 120},
121 {0x3215103C, "Smart Array E200i", &SA5_access, 120},
de923916 122 {0x3237103C, "Smart Array E500", &SA5_access, 512},
9cff3b38 123 {0x323D103C, "Smart Array P700m", &SA5_access, 512},
f880632f 124 {0xFFFF103C, "Unknown Smart Array", &SA5_access, 120},
1da177e4
LT		 125};
126
d14c4ab5 127/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 128#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 129#define MAX_IOCTL_CONFIG_WAIT 1000
130
131/*define how many times we will try a command because of bus resets */
132#define MAX_CMD_RETRIES 3
133
134#define READ_AHEAD 1024
1da177e4
LT		 135#define MAX_CTLR 32
136
137/* Originally cciss driver only supports 8 major numbers */
138#define MAX_CTLR_ORIG 8
139
1da177e4
LT		 140static ctlr_info_t *hba[MAX_CTLR];
141
165125e1 142static void do_cciss_request(struct request_queue *q);
7d12e780 143static irqreturn_t do_cciss_intr(int irq, void *dev_id);
1da177e4
LT		 144static int cciss_open(struct inode *inode, struct file *filep);
145static int cciss_release(struct inode *inode, struct file *filep);
7c832835
BH		 146static int cciss_ioctl(struct inode *inode, struct file *filep,
147 unsigned int cmd, unsigned long arg);
a885c8c4 148static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 149
1da177e4 150static int cciss_revalidate(struct gendisk *disk);
ddd47442 151static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk);
7c832835
BH		 152static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
153 int clear_all);
1da177e4 154
00988a35
MMOD		 155static void cciss_read_capacity(int ctlr, int logvol, int withirq,
156 sector_t *total_size, unsigned int *block_size);
157static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
158 sector_t *total_size, unsigned int *block_size);
159static void cciss_geometry_inquiry(int ctlr, int logvol,
160 int withirq, sector_t total_size,
161 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 162 drive_info_struct *drv);
1da177e4 163static void cciss_getgeometry(int cntl_num);
7c832835
BH		 164static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
165 __u32);
166static void start_io(ctlr_info_t *h);
167static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
168 unsigned int use_unit_num, unsigned int log_unit,
169 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
170static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
171 unsigned int use_unit_num, unsigned int log_unit,
172 __u8 page_code, int cmd_type);
1da177e4 173
33079b21
MM		 174static void fail_all_cmds(unsigned long ctlr);
175
1da177e4 176#ifdef CONFIG_PROC_FS
7c832835
BH		 177static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
178 int length, int *eof, void *data);
1da177e4
LT		 179static void cciss_procinit(int i);
180#else
7c832835
BH		 181static void cciss_procinit(int i)
182{
183}
184#endif /* CONFIG_PROC_FS */
1da177e4
LT		 185
186#ifdef CONFIG_COMPAT
187static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
188#endif
189
7c832835
BH		 190static struct block_device_operations cciss_fops = {
191 .owner = THIS_MODULE,
192 .open = cciss_open,
193 .release = cciss_release,
194 .ioctl = cciss_ioctl,
195 .getgeo = cciss_getgeo,
1da177e4 196#ifdef CONFIG_COMPAT
7c832835 197 .compat_ioctl = cciss_compat_ioctl,
1da177e4 198#endif
7c832835 199 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 200};
201
202/*
203 * Enqueuing and dequeuing functions for cmdlists.
204 */
205static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c)
206{
7c832835
BH		 207 if (*Qptr == NULL) {
208 *Qptr = c;
209 c->next = c->prev = c;
210 } else {
211 c->prev = (*Qptr)->prev;
212 c->next = (*Qptr);
213 (*Qptr)->prev->next = c;
214 (*Qptr)->prev = c;
215 }
1da177e4
LT		 216}
217
7c832835
BH		 218static inline CommandList_struct *removeQ(CommandList_struct **Qptr,
219 CommandList_struct *c)
1da177e4 220{
7c832835
BH		 221 if (c && c->next != c) {
222 if (*Qptr == c)
223 *Qptr = c->next;
224 c->prev->next = c->next;
225 c->next->prev = c->prev;
226 } else {
227 *Qptr = NULL;
228 }
229 return c;
1da177e4
LT		 230}
231
232#include "cciss_scsi.c" /* For SCSI tape support */
233
0f5486ec
RD		 234#define RAID_UNKNOWN 6
235
1da177e4
LT		 236#ifdef CONFIG_PROC_FS
237
238/*
239 * Report information about this controller.
240 */
241#define ENG_GIG 1000000000
242#define ENG_GIG_FACTOR (ENG_GIG/512)
7c832835
BH		 243static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
244 "UNKNOWN"
245};
1da177e4
LT		 246
247static struct proc_dir_entry *proc_cciss;
248
7c832835
BH		 249static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
250 int length, int *eof, void *data)
1da177e4 251{
7c832835
BH		 252 off_t pos = 0;
253 off_t len = 0;
254 int size, i, ctlr;
255 ctlr_info_t *h = (ctlr_info_t *) data;
256 drive_info_struct *drv;
1da177e4 257 unsigned long flags;
7c832835 258 sector_t vol_sz, vol_sz_frac;
1da177e4 259
7c832835 260 ctlr = h->ctlr;
1da177e4
LT		 261
262 /* prevent displaying bogus info during configuration
263 * or deconfiguration of a logical volume
264 */
265 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
266 if (h->busy_configuring) {
267 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
7c832835 268 return -EBUSY;
1da177e4
LT		 269 }
270 h->busy_configuring = 1;
271 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
272
7c832835
BH		 273 size = sprintf(buffer, "%s: HP %s Controller\n"
274 "Board ID: 0x%08lx\n"
275 "Firmware Version: %c%c%c%c\n"
276 "IRQ: %d\n"
277 "Logical drives: %d\n"
92c4231a 278 "Max sectors: %d\n"
7c832835
BH		 279 "Current Q depth: %d\n"
280 "Current # commands on controller: %d\n"
281 "Max Q depth since init: %d\n"
282 "Max # commands on controller since init: %d\n"
283 "Max SG entries since init: %d\n\n",
284 h->devname,
285 h->product_name,
286 (unsigned long)h->board_id,
287 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
288 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
92c4231a
MM		 289 h->num_luns,
290 h->cciss_max_sectors,
291 h->Qdepth, h->commands_outstanding,
7c832835
BH		 292 h->maxQsinceinit, h->max_outstanding, h->maxSG);
293
294 pos += size;
295 len += size;
1da177e4 296 cciss_proc_tape_report(ctlr, buffer, &pos, &len);
7c832835 297 for (i = 0; i <= h->highest_lun; i++) {
1da177e4 298
7c832835 299 drv = &h->drv[i];
ddd47442 300 if (drv->heads == 0)
1da177e4
LT		 301 continue;
302
303 vol_sz = drv->nr_blocks;
304 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
305 vol_sz_frac *= 100;
306 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
307
308 if (drv->raid_level > 5)
309 drv->raid_level = RAID_UNKNOWN;
7c832835
BH		 310 size = sprintf(buffer + len, "cciss/c%dd%d:"
311 "\t%4u.%02uGB\tRAID %s\n",
312 ctlr, i, (int)vol_sz, (int)vol_sz_frac,
313 raid_label[drv->raid_level]);
314 pos += size;
315 len += size;
316 }
317
318 *eof = 1;
319 *start = buffer + offset;
320 len -= offset;
321 if (len > length)
322 len = length;
1da177e4 323 h->busy_configuring = 0;
7c832835 324 return len;
1da177e4
LT		 325}
326
7c832835
BH		 327static int
328cciss_proc_write(struct file *file, const char __user *buffer,
329 unsigned long count, void *data)
1da177e4
LT		 330{
331 unsigned char cmd[80];
332 int len;
333#ifdef CONFIG_CISS_SCSI_TAPE
334 ctlr_info_t *h = (ctlr_info_t *) data;
335 int rc;
336#endif
337
7c832835
BH		 338 if (count > sizeof(cmd) - 1)
339 return -EINVAL;
340 if (copy_from_user(cmd, buffer, count))
341 return -EFAULT;
1da177e4
LT		 342 cmd[count] = '\0';
343 len = strlen(cmd); // above 3 lines ensure safety
7c832835 344 if (len && cmd[len - 1] == '\n')
1da177e4
LT		 345 cmd[--len] = '\0';
346# ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 347 if (strcmp("engage scsi", cmd) == 0) {
348 rc = cciss_engage_scsi(h->ctlr);
349 if (rc != 0)
350 return -rc;
351 return count;
352 }
353 /* might be nice to have "disengage" too, but it's not
354 safely possible. (only 1 module use count, lock issues.) */
1da177e4
LT		 355# endif
356 return -EINVAL;
357}
358
359/*
360 * Get us a file in /proc/cciss that says something about each controller.
361 * Create /proc/cciss if it doesn't exist yet.
362 */
363static void __devinit cciss_procinit(int i)
364{
365 struct proc_dir_entry *pde;
366
7c832835
BH		 367 if (proc_cciss == NULL) {
368 proc_cciss = proc_mkdir("cciss", proc_root_driver);
369 if (!proc_cciss)
1da177e4 370 return;
7c832835 371 }
1da177e4 372
7c832835
BH		 373 pde = create_proc_read_entry(hba[i]->devname,
374 S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH,
375 proc_cciss, cciss_proc_get_info, hba[i]);
1da177e4
LT		 376 pde->write_proc = cciss_proc_write;
377}
7c832835 378#endif /* CONFIG_PROC_FS */
1da177e4 379
7c832835
BH		 380/*
381 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 382 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 383 * which ones are free or in use. For operations that can wait for kmalloc
384 * to possible sleep, this routine can be called with get_from_pool set to 0.
385 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
386 */
387static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 388{
389 CommandList_struct *c;
7c832835 390 int i;
1da177e4
LT		 391 u64bit temp64;
392 dma_addr_t cmd_dma_handle, err_dma_handle;
393
7c832835
BH		 394 if (!get_from_pool) {
395 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
396 sizeof(CommandList_struct), &cmd_dma_handle);
397 if (c == NULL)
398 return NULL;
1da177e4
LT		 399 memset(c, 0, sizeof(CommandList_struct));
400
33079b21
MM		 401 c->cmdindex = -1;
402
7c832835
BH		 403 c->err_info = (ErrorInfo_struct *)
404 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
405 &err_dma_handle);
406
407 if (c->err_info == NULL) {
408 pci_free_consistent(h->pdev,
1da177e4
LT		 409 sizeof(CommandList_struct), c, cmd_dma_handle);
410 return NULL;
411 }
412 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 413 } else { /* get it out of the controllers pool */
414
415 do {
f880632f
MM		 416 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
417 if (i == h->nr_cmds)
7c832835
BH		 418 return NULL;
419 } while (test_and_set_bit
420 (i & (BITS_PER_LONG - 1),
421 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 422#ifdef CCISS_DEBUG
423 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
424#endif
7c832835 425 c = h->cmd_pool + i;
1da177e4 426 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 427 cmd_dma_handle = h->cmd_pool_dhandle
428 + i * sizeof(CommandList_struct);
1da177e4
LT		 429 c->err_info = h->errinfo_pool + i;
430 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 431 err_dma_handle = h->errinfo_pool_dhandle
432 + i * sizeof(ErrorInfo_struct);
433 h->nr_allocs++;
33079b21
MM		 434
435 c->cmdindex = i;
7c832835 436 }
1da177e4
LT		 437
438 c->busaddr = (__u32) cmd_dma_handle;
7c832835 439 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 440 c->ErrDesc.Addr.lower = temp64.val32.lower;
441 c->ErrDesc.Addr.upper = temp64.val32.upper;
442 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 443
7c832835
BH		 444 c->ctlr = h->ctlr;
445 return c;
1da177e4
LT		 446}
447
7c832835
BH		 448/*
449 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 450 */
451static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
452{
453 int i;
454 u64bit temp64;
455
7c832835 456 if (!got_from_pool) {
1da177e4
LT		 457 temp64.val32.lower = c->ErrDesc.Addr.lower;
458 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 459 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
460 c->err_info, (dma_addr_t) temp64.val);
461 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
462 c, (dma_addr_t) c->busaddr);
463 } else {
1da177e4 464 i = c - h->cmd_pool;
7c832835
BH		 465 clear_bit(i & (BITS_PER_LONG - 1),
466 h->cmd_pool_bits + (i / BITS_PER_LONG));
467 h->nr_frees++;
468 }
1da177e4
LT		 469}
470
471static inline ctlr_info_t *get_host(struct gendisk *disk)
472{
7c832835 473 return disk->queue->queuedata;
1da177e4
LT		 474}
475
476static inline drive_info_struct *get_drv(struct gendisk *disk)
477{
478 return disk->private_data;
479}
480
481/*
482 * Open. Make sure the device is really there.
483 */
484static int cciss_open(struct inode *inode, struct file *filep)
485{
486 ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
487 drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);
488
489#ifdef CCISS_DEBUG
490 printk(KERN_DEBUG "cciss_open %s\n", inode->i_bdev->bd_disk->disk_name);
7c832835 491#endif /* CCISS_DEBUG */
1da177e4 492
ddd47442
MM		 493 if (host->busy_initializing || drv->busy_configuring)
494 return -EBUSY;
1da177e4
LT		 495 /*
496 * Root is allowed to open raw volume zero even if it's not configured
497 * so array config can still work. Root is also allowed to open any
498 * volume that has a LUN ID, so it can issue IOCTL to reread the
499 * disk information. I don't think I really like this
500 * but I'm already using way to many device nodes to claim another one
501 * for "raw controller".
502 */
7a06f789 503 if (drv->heads == 0) {
7c832835 504 if (iminor(inode) != 0) { /* not node 0? */
1da177e4
LT		 505 /* if not node 0 make sure it is a partition = 0 */
506 if (iminor(inode) & 0x0f) {
7c832835 507 return -ENXIO;
1da177e4
LT		 508 /* if it is, make sure we have a LUN ID */
509 } else if (drv->LunID == 0) {
510 return -ENXIO;
511 }
512 }
513 if (!capable(CAP_SYS_ADMIN))
514 return -EPERM;
515 }
516 drv->usage_count++;
517 host->usage_count++;
518 return 0;
519}
7c832835 520
1da177e4
LT		 521/*
522 * Close. Sync first.
523 */
524static int cciss_release(struct inode *inode, struct file *filep)
525{
526 ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
527 drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);
528
529#ifdef CCISS_DEBUG
7c832835
BH		 530 printk(KERN_DEBUG "cciss_release %s\n",
531 inode->i_bdev->bd_disk->disk_name);
532#endif /* CCISS_DEBUG */
1da177e4
LT		 533
534 drv->usage_count--;
535 host->usage_count--;
536 return 0;
537}
538
539#ifdef CONFIG_COMPAT
540
541static int do_ioctl(struct file *f, unsigned cmd, unsigned long arg)
542{
543 int ret;
544 lock_kernel();
6c648be6 545 ret = cciss_ioctl(f->f_path.dentry->d_inode, f, cmd, arg);
1da177e4
LT		 546 unlock_kernel();
547 return ret;
548}
549
7c832835
BH		 550static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
551 unsigned long arg);
552static int cciss_ioctl32_big_passthru(struct file *f, unsigned cmd,
553 unsigned long arg);
1da177e4
LT		 554
555static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
556{
557 switch (cmd) {
558 case CCISS_GETPCIINFO:
559 case CCISS_GETINTINFO:
560 case CCISS_SETINTINFO:
561 case CCISS_GETNODENAME:
562 case CCISS_SETNODENAME:
563 case CCISS_GETHEARTBEAT:
564 case CCISS_GETBUSTYPES:
565 case CCISS_GETFIRMVER:
566 case CCISS_GETDRIVVER:
567 case CCISS_REVALIDVOLS:
568 case CCISS_DEREGDISK:
569 case CCISS_REGNEWDISK:
570 case CCISS_REGNEWD:
571 case CCISS_RESCANDISK:
572 case CCISS_GETLUNINFO:
573 return do_ioctl(f, cmd, arg);
574
575 case CCISS_PASSTHRU32:
576 return cciss_ioctl32_passthru(f, cmd, arg);
577 case CCISS_BIG_PASSTHRU32:
578 return cciss_ioctl32_big_passthru(f, cmd, arg);
579
580 default:
581 return -ENOIOCTLCMD;
582 }
583}
584
7c832835
BH		 585static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
586 unsigned long arg)
1da177e4
LT		 587{
588 IOCTL32_Command_struct __user *arg32 =
7c832835 589 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 590 IOCTL_Command_struct arg64;
591 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
592 int err;
593 u32 cp;
594
595 err = 0;
7c832835
BH		 596 err |=
597 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
598 sizeof(arg64.LUN_info));
599 err |=
600 copy_from_user(&arg64.Request, &arg32->Request,
601 sizeof(arg64.Request));
602 err |=
603 copy_from_user(&arg64.error_info, &arg32->error_info,
604 sizeof(arg64.error_info));
1da177e4
LT		 605 err |= get_user(arg64.buf_size, &arg32->buf_size);
606 err |= get_user(cp, &arg32->buf);
607 arg64.buf = compat_ptr(cp);
608 err |= copy_to_user(p, &arg64, sizeof(arg64));
609
610 if (err)
611 return -EFAULT;
612
7c832835 613 err = do_ioctl(f, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 614 if (err)
615 return err;
7c832835
BH		 616 err |=
617 copy_in_user(&arg32->error_info, &p->error_info,
618 sizeof(arg32->error_info));
1da177e4
LT		 619 if (err)
620 return -EFAULT;
621 return err;
622}
623
7c832835
BH		 624static int cciss_ioctl32_big_passthru(struct file *file, unsigned cmd,
625 unsigned long arg)
1da177e4
LT		 626{
627 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 628 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 629 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 630 BIG_IOCTL_Command_struct __user *p =
631 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 632 int err;
633 u32 cp;
634
635 err = 0;
7c832835
BH		 636 err |=
637 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
638 sizeof(arg64.LUN_info));
639 err |=
640 copy_from_user(&arg64.Request, &arg32->Request,
641 sizeof(arg64.Request));
642 err |=
643 copy_from_user(&arg64.error_info, &arg32->error_info,
644 sizeof(arg64.error_info));
1da177e4
LT		 645 err |= get_user(arg64.buf_size, &arg32->buf_size);
646 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
647 err |= get_user(cp, &arg32->buf);
648 arg64.buf = compat_ptr(cp);
649 err |= copy_to_user(p, &arg64, sizeof(arg64));
650
651 if (err)
7c832835 652 return -EFAULT;
1da177e4 653
7c832835 654 err = do_ioctl(file, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 655 if (err)
656 return err;
7c832835
BH		 657 err |=
658 copy_in_user(&arg32->error_info, &p->error_info,
659 sizeof(arg32->error_info));
1da177e4
LT		 660 if (err)
661 return -EFAULT;
662 return err;
663}
664#endif
a885c8c4
CH		 665
666static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
667{
668 drive_info_struct *drv = get_drv(bdev->bd_disk);
669
670 if (!drv->cylinders)
671 return -ENXIO;
672
673 geo->heads = drv->heads;
674 geo->sectors = drv->sectors;
675 geo->cylinders = drv->cylinders;
676 return 0;
677}
678
1da177e4 679/*
7c832835 680 * ioctl
1da177e4 681 */
7c832835
BH		 682static int cciss_ioctl(struct inode *inode, struct file *filep,
683 unsigned int cmd, unsigned long arg)
1da177e4
LT		 684{
685 struct block_device *bdev = inode->i_bdev;
686 struct gendisk *disk = bdev->bd_disk;
687 ctlr_info_t *host = get_host(disk);
688 drive_info_struct *drv = get_drv(disk);
689 int ctlr = host->ctlr;
690 void __user *argp = (void __user *)arg;
691
692#ifdef CCISS_DEBUG
693 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 694#endif /* CCISS_DEBUG */
695
696 switch (cmd) {
1da177e4 697 case CCISS_GETPCIINFO:
7c832835
BH		 698 {
699 cciss_pci_info_struct pciinfo;
700
701 if (!arg)
702 return -EINVAL;
703 pciinfo.domain = pci_domain_nr(host->pdev->bus);
704 pciinfo.bus = host->pdev->bus->number;
705 pciinfo.dev_fn = host->pdev->devfn;
706 pciinfo.board_id = host->board_id;
707 if (copy_to_user
708 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
709 return -EFAULT;
710 return 0;
711 }
1da177e4 712 case CCISS_GETINTINFO:
7c832835
BH		 713 {
714 cciss_coalint_struct intinfo;
715 if (!arg)
716 return -EINVAL;
717 intinfo.delay =
718 readl(&host->cfgtable->HostWrite.CoalIntDelay);
719 intinfo.count =
720 readl(&host->cfgtable->HostWrite.CoalIntCount);
721 if (copy_to_user
722 (argp, &intinfo, sizeof(cciss_coalint_struct)))
723 return -EFAULT;
724 return 0;
725 }
1da177e4 726 case CCISS_SETINTINFO:
1da177e4 727 {
7c832835
BH		 728 cciss_coalint_struct intinfo;
729 unsigned long flags;
730 int i;
731
732 if (!arg)
733 return -EINVAL;
734 if (!capable(CAP_SYS_ADMIN))
735 return -EPERM;
736 if (copy_from_user
737 (&intinfo, argp, sizeof(cciss_coalint_struct)))
738 return -EFAULT;
739 if ((intinfo.delay == 0) && (intinfo.count == 0))
740 {
741// printk("cciss_ioctl: delay and count cannot be 0\n");
742 return -EINVAL;
743 }
744 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
745 /* Update the field, and then ring the doorbell */
746 writel(intinfo.delay,
747 &(host->cfgtable->HostWrite.CoalIntDelay));
748 writel(intinfo.count,
749 &(host->cfgtable->HostWrite.CoalIntCount));
750 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
751
752 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
753 if (!(readl(host->vaddr + SA5_DOORBELL)
754 & CFGTBL_ChangeReq))
755 break;
756 /* delay and try again */
757 udelay(1000);
758 }
759 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
760 if (i >= MAX_IOCTL_CONFIG_WAIT)
761 return -EAGAIN;
762 return 0;
1da177e4 763 }
1da177e4 764 case CCISS_GETNODENAME:
7c832835
BH		 765 {
766 NodeName_type NodeName;
767 int i;
768
769 if (!arg)
770 return -EINVAL;
771 for (i = 0; i < 16; i++)
772 NodeName[i] =
773 readb(&host->cfgtable->ServerName[i]);
774 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
775 return -EFAULT;
776 return 0;
777 }
1da177e4 778 case CCISS_SETNODENAME:
7c832835
BH		 779 {
780 NodeName_type NodeName;
781 unsigned long flags;
782 int i;
783
784 if (!arg)
785 return -EINVAL;
786 if (!capable(CAP_SYS_ADMIN))
787 return -EPERM;
788
789 if (copy_from_user
790 (NodeName, argp, sizeof(NodeName_type)))
791 return -EFAULT;
792
793 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
794
795 /* Update the field, and then ring the doorbell */
796 for (i = 0; i < 16; i++)
797 writeb(NodeName[i],
798 &host->cfgtable->ServerName[i]);
799
800 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
801
802 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
803 if (!(readl(host->vaddr + SA5_DOORBELL)
804 & CFGTBL_ChangeReq))
805 break;
806 /* delay and try again */
807 udelay(1000);
808 }
809 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
810 if (i >= MAX_IOCTL_CONFIG_WAIT)
811 return -EAGAIN;
812 return 0;
813 }
1da177e4
LT		 814
815 case CCISS_GETHEARTBEAT:
7c832835
BH		 816 {
817 Heartbeat_type heartbeat;
818
819 if (!arg)
820 return -EINVAL;
821 heartbeat = readl(&host->cfgtable->HeartBeat);
822 if (copy_to_user
823 (argp, &heartbeat, sizeof(Heartbeat_type)))
824 return -EFAULT;
825 return 0;
826 }
1da177e4 827 case CCISS_GETBUSTYPES:
7c832835
BH		 828 {
829 BusTypes_type BusTypes;
830
831 if (!arg)
832 return -EINVAL;
833 BusTypes = readl(&host->cfgtable->BusTypes);
834 if (copy_to_user
835 (argp, &BusTypes, sizeof(BusTypes_type)))
836 return -EFAULT;
837 return 0;
838 }
1da177e4 839 case CCISS_GETFIRMVER:
7c832835
BH		 840 {
841 FirmwareVer_type firmware;
1da177e4 842
7c832835
BH		 843 if (!arg)
844 return -EINVAL;
845 memcpy(firmware, host->firm_ver, 4);
1da177e4 846
7c832835
BH		 847 if (copy_to_user
848 (argp, firmware, sizeof(FirmwareVer_type)))
849 return -EFAULT;
850 return 0;
851 }
852 case CCISS_GETDRIVVER:
853 {
854 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 855
7c832835
BH		 856 if (!arg)
857 return -EINVAL;
1da177e4 858
7c832835
BH		 859 if (copy_to_user
860 (argp, &DriverVer, sizeof(DriverVer_type)))
861 return -EFAULT;
862 return 0;
863 }
1da177e4
LT		 864
865 case CCISS_REVALIDVOLS:
3833a748 866 return rebuild_lun_table(host, NULL);
7c832835
BH		 867
868 case CCISS_GETLUNINFO:{
869 LogvolInfo_struct luninfo;
870
871 luninfo.LunID = drv->LunID;
872 luninfo.num_opens = drv->usage_count;
873 luninfo.num_parts = 0;
874 if (copy_to_user(argp, &luninfo,
875 sizeof(LogvolInfo_struct)))
876 return -EFAULT;
877 return 0;
878 }
1da177e4 879 case CCISS_DEREGDISK:
ddd47442 880 return rebuild_lun_table(host, disk);
1da177e4
LT		 881
882 case CCISS_REGNEWD:
ddd47442 883 return rebuild_lun_table(host, NULL);
1da177e4
LT		 884
885 case CCISS_PASSTHRU:
1da177e4 886 {
7c832835
BH		 887 IOCTL_Command_struct iocommand;
888 CommandList_struct *c;
889 char *buff = NULL;
890 u64bit temp64;
891 unsigned long flags;
6e9a4738 892 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 893
7c832835
BH		 894 if (!arg)
895 return -EINVAL;
1da177e4 896
7c832835
BH		 897 if (!capable(CAP_SYS_RAWIO))
898 return -EPERM;
1da177e4 899
7c832835
BH		 900 if (copy_from_user
901 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
902 return -EFAULT;
903 if ((iocommand.buf_size < 1) &&
904 (iocommand.Request.Type.Direction != XFER_NONE)) {
905 return -EINVAL;
906 }
907#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
908 /* Check kmalloc limits */
909 if (iocommand.buf_size > 128000)
910 return -EINVAL;
911#endif
912 if (iocommand.buf_size > 0) {
913 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
914 if (buff == NULL)
915 return -EFAULT;
916 }
917 if (iocommand.Request.Type.Direction == XFER_WRITE) {
918 /* Copy the data into the buffer we created */
919 if (copy_from_user
920 (buff, iocommand.buf, iocommand.buf_size)) {
921 kfree(buff);
922 return -EFAULT;
923 }
924 } else {
925 memset(buff, 0, iocommand.buf_size);
926 }
927 if ((c = cmd_alloc(host, 0)) == NULL) {
928 kfree(buff);
929 return -ENOMEM;
930 }
931 // Fill in the command type
932 c->cmd_type = CMD_IOCTL_PEND;
933 // Fill in Command Header
934 c->Header.ReplyQueue = 0; // unused in simple mode
935 if (iocommand.buf_size > 0) // buffer to fill
936 {
937 c->Header.SGList = 1;
938 c->Header.SGTotal = 1;
939 } else // no buffers to fill
940 {
941 c->Header.SGList = 0;
942 c->Header.SGTotal = 0;
943 }
944 c->Header.LUN = iocommand.LUN_info;
945 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 946
7c832835
BH		 947 // Fill in Request block
948 c->Request = iocommand.Request;
1da177e4 949
7c832835
BH		 950 // Fill in the scatter gather information
951 if (iocommand.buf_size > 0) {
952 temp64.val = pci_map_single(host->pdev, buff,
953 iocommand.buf_size,
954 PCI_DMA_BIDIRECTIONAL);
955 c->SG[0].Addr.lower = temp64.val32.lower;
956 c->SG[0].Addr.upper = temp64.val32.upper;
957 c->SG[0].Len = iocommand.buf_size;
958 c->SG[0].Ext = 0; // we are not chaining
959 }
960 c->waiting = &wait;
961
962 /* Put the request on the tail of the request queue */
963 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
964 addQ(&host->reqQ, c);
965 host->Qdepth++;
966 start_io(host);
967 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
968
969 wait_for_completion(&wait);
970
971 /* unlock the buffers from DMA */
972 temp64.val32.lower = c->SG[0].Addr.lower;
973 temp64.val32.upper = c->SG[0].Addr.upper;
974 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
975 iocommand.buf_size,
976 PCI_DMA_BIDIRECTIONAL);
977
978 /* Copy the error information out */
979 iocommand.error_info = *(c->err_info);
980 if (copy_to_user
981 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
982 kfree(buff);
1da177e4
LT		 983 cmd_free(host, c, 0);
984 return -EFAULT;
985 }
7c832835
BH		 986
987 if (iocommand.Request.Type.Direction == XFER_READ) {
988 /* Copy the data out of the buffer we created */
989 if (copy_to_user
990 (iocommand.buf, buff, iocommand.buf_size)) {
991 kfree(buff);
992 cmd_free(host, c, 0);
993 return -EFAULT;
994 }
995 }
996 kfree(buff);
997 cmd_free(host, c, 0);
998 return 0;
1da177e4 999 }
7c832835
BH		 1000 case CCISS_BIG_PASSTHRU:{
1001 BIG_IOCTL_Command_struct *ioc;
1002 CommandList_struct *c;
1003 unsigned char **buff = NULL;
1004 int *buff_size = NULL;
1005 u64bit temp64;
1006 unsigned long flags;
1007 BYTE sg_used = 0;
1008 int status = 0;
1009 int i;
6e9a4738 1010 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1011 __u32 left;
1012 __u32 sz;
1013 BYTE __user *data_ptr;
1014
1015 if (!arg)
1016 return -EINVAL;
1017 if (!capable(CAP_SYS_RAWIO))
1018 return -EPERM;
1019 ioc = (BIG_IOCTL_Command_struct *)
1020 kmalloc(sizeof(*ioc), GFP_KERNEL);
1021 if (!ioc) {
1022 status = -ENOMEM;
1023 goto cleanup1;
1024 }
1025 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1026 status = -EFAULT;
1027 goto cleanup1;
1028 }
1029 if ((ioc->buf_size < 1) &&
1030 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1031 status = -EINVAL;
1032 goto cleanup1;
7c832835
BH		 1033 }
1034 /* Check kmalloc limits using all SGs */
1035 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1036 status = -EINVAL;
1037 goto cleanup1;
1038 }
1039 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1040 status = -EINVAL;
1041 goto cleanup1;
1042 }
1043 buff =
1044 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1045 if (!buff) {
1da177e4
LT		 1046 status = -ENOMEM;
1047 goto cleanup1;
1048 }
5cbded58 1049 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1050 GFP_KERNEL);
1051 if (!buff_size) {
1052 status = -ENOMEM;
1053 goto cleanup1;
1054 }
1055 left = ioc->buf_size;
1056 data_ptr = ioc->buf;
1057 while (left) {
1058 sz = (left >
1059 ioc->malloc_size) ? ioc->
1060 malloc_size : left;
1061 buff_size[sg_used] = sz;
1062 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1063 if (buff[sg_used] == NULL) {
1da177e4 1064 status = -ENOMEM;
15534d38
JA		 1065 goto cleanup1;
1066 }
7c832835
BH		 1067 if (ioc->Request.Type.Direction == XFER_WRITE) {
1068 if (copy_from_user
1069 (buff[sg_used], data_ptr, sz)) {
1070 status = -ENOMEM;
1071 goto cleanup1;
1072 }
1073 } else {
1074 memset(buff[sg_used], 0, sz);
1075 }
1076 left -= sz;
1077 data_ptr += sz;
1078 sg_used++;
1079 }
1080 if ((c = cmd_alloc(host, 0)) == NULL) {
1081 status = -ENOMEM;
1082 goto cleanup1;
1083 }
1084 c->cmd_type = CMD_IOCTL_PEND;
1085 c->Header.ReplyQueue = 0;
1086
1087 if (ioc->buf_size > 0) {
1088 c->Header.SGList = sg_used;
1089 c->Header.SGTotal = sg_used;
1da177e4 1090 } else {
7c832835
BH		 1091 c->Header.SGList = 0;
1092 c->Header.SGTotal = 0;
1da177e4 1093 }
7c832835
BH		 1094 c->Header.LUN = ioc->LUN_info;
1095 c->Header.Tag.lower = c->busaddr;
1096
1097 c->Request = ioc->Request;
1098 if (ioc->buf_size > 0) {
1099 int i;
1100 for (i = 0; i < sg_used; i++) {
1101 temp64.val =
1102 pci_map_single(host->pdev, buff[i],
1103 buff_size[i],
1104 PCI_DMA_BIDIRECTIONAL);
1105 c->SG[i].Addr.lower =
1106 temp64.val32.lower;
1107 c->SG[i].Addr.upper =
1108 temp64.val32.upper;
1109 c->SG[i].Len = buff_size[i];
1110 c->SG[i].Ext = 0; /* we are not chaining */
1111 }
1112 }
1113 c->waiting = &wait;
1114 /* Put the request on the tail of the request queue */
1115 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1116 addQ(&host->reqQ, c);
1117 host->Qdepth++;
1118 start_io(host);
1119 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1120 wait_for_completion(&wait);
1121 /* unlock the buffers from DMA */
1122 for (i = 0; i < sg_used; i++) {
1123 temp64.val32.lower = c->SG[i].Addr.lower;
1124 temp64.val32.upper = c->SG[i].Addr.upper;
1125 pci_unmap_single(host->pdev,
1126 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1127 PCI_DMA_BIDIRECTIONAL);
1da177e4 1128 }
7c832835
BH		 1129 /* Copy the error information out */
1130 ioc->error_info = *(c->err_info);
1131 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1132 cmd_free(host, c, 0);
1133 status = -EFAULT;
1134 goto cleanup1;
1135 }
1136 if (ioc->Request.Type.Direction == XFER_READ) {
1137 /* Copy the data out of the buffer we created */
1138 BYTE __user *ptr = ioc->buf;
1139 for (i = 0; i < sg_used; i++) {
1140 if (copy_to_user
1141 (ptr, buff[i], buff_size[i])) {
1142 cmd_free(host, c, 0);
1143 status = -EFAULT;
1144 goto cleanup1;
1145 }
1146 ptr += buff_size[i];
1da177e4 1147 }
1da177e4 1148 }
7c832835
BH		 1149 cmd_free(host, c, 0);
1150 status = 0;
1151 cleanup1:
1152 if (buff) {
1153 for (i = 0; i < sg_used; i++)
1154 kfree(buff[i]);
1155 kfree(buff);
1156 }
1157 kfree(buff_size);
1158 kfree(ioc);
1159 return status;
1da177e4 1160 }
03bbfee5
MMOD		 1161
1162 /* scsi_cmd_ioctl handles these, below, though some are not */
1163 /* very meaningful for cciss. SG_IO is the main one people want. */
1164
1165 case SG_GET_VERSION_NUM:
1166 case SG_SET_TIMEOUT:
1167 case SG_GET_TIMEOUT:
1168 case SG_GET_RESERVED_SIZE:
1169 case SG_SET_RESERVED_SIZE:
1170 case SG_EMULATED_HOST:
1171 case SG_IO:
1172 case SCSI_IOCTL_SEND_COMMAND:
9793c326 1173 return scsi_cmd_ioctl(filep, disk->queue, disk, cmd, argp);
03bbfee5
MMOD		 1174
1175 /* scsi_cmd_ioctl would normally handle these, below, but */
1176 /* they aren't a good fit for cciss, as CD-ROMs are */
1177 /* not supported, and we don't have any bus/target/lun */
1178 /* which we present to the kernel. */
1179
1180 case CDROM_SEND_PACKET:
1181 case CDROMCLOSETRAY:
1182 case CDROMEJECT:
1183 case SCSI_IOCTL_GET_IDLUN:
1184 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1185 default:
1186 return -ENOTTY;
1187 }
1da177e4
LT		 1188}
1189
ca1e0484
MM		 1190static inline void complete_buffers(struct bio *bio, int status)
1191{
1192 while (bio) {
1193 struct bio *xbh = bio->bi_next;
ca1e0484
MM		 1194
1195 bio->bi_next = NULL;
6712ecf8 1196 bio_endio(bio, status ? 0 : -EIO);
ca1e0484
MM		 1197 bio = xbh;
1198 }
ca1e0484
MM		 1199}
1200
7b30f092
JA		 1201static void cciss_check_queues(ctlr_info_t *h)
1202{
1203 int start_queue = h->next_to_run;
1204 int i;
1205
1206 /* check to see if we have maxed out the number of commands that can
1207 * be placed on the queue. If so then exit. We do this check here
1208 * in case the interrupt we serviced was from an ioctl and did not
1209 * free any new commands.
1210 */
f880632f 1211 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1212 return;
1213
1214 /* We have room on the queue for more commands. Now we need to queue
1215 * them up. We will also keep track of the next queue to run so
1216 * that every queue gets a chance to be started first.
1217 */
1218 for (i = 0; i < h->highest_lun + 1; i++) {
1219 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1220 /* make sure the disk has been added and the drive is real
1221 * because this can be called from the middle of init_one.
1222 */
1223 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1224 continue;
1225 blk_start_queue(h->gendisk[curr_queue]->queue);
1226
1227 /* check to see if we have maxed out the number of commands
1228 * that can be placed on the queue.
1229 */
f880632f 1230 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1231 if (curr_queue == start_queue) {
1232 h->next_to_run =
1233 (start_queue + 1) % (h->highest_lun + 1);
1234 break;
1235 } else {
1236 h->next_to_run = curr_queue;
1237 break;
1238 }
1239 } else {
1240 curr_queue = (curr_queue + 1) % (h->highest_lun + 1);
1241 }
1242 }
1243}
1244
ca1e0484
MM		 1245static void cciss_softirq_done(struct request *rq)
1246{
1247 CommandList_struct *cmd = rq->completion_data;
1248 ctlr_info_t *h = hba[cmd->ctlr];
1249 unsigned long flags;
1250 u64bit temp64;
1251 int i, ddir;
1252
1253 if (cmd->Request.Type.Direction == XFER_READ)
1254 ddir = PCI_DMA_FROMDEVICE;
1255 else
1256 ddir = PCI_DMA_TODEVICE;
1257
1258 /* command did not need to be retried */
1259 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1260 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1261 temp64.val32.lower = cmd->SG[i].Addr.lower;
1262 temp64.val32.upper = cmd->SG[i].Addr.upper;
1263 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1264 }
1265
198b7660 1266 complete_buffers(rq->bio, (rq->errors == 0));
ca1e0484 1267
b369c2cf
JA		 1268 if (blk_fs_request(rq)) {
1269 const int rw = rq_data_dir(rq);
1270
1271 disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
1272 }
1273
ca1e0484
MM		 1274#ifdef CCISS_DEBUG
1275 printk("Done with %p\n", rq);
7c832835 1276#endif /* CCISS_DEBUG */
ca1e0484 1277
8bd0b97e 1278 add_disk_randomness(rq->rq_disk);
ca1e0484 1279 spin_lock_irqsave(&h->lock, flags);
198b7660 1280 end_that_request_last(rq, (rq->errors == 0));
7c832835 1281 cmd_free(h, cmd, 1);
7b30f092 1282 cciss_check_queues(h);
ca1e0484
MM		 1283 spin_unlock_irqrestore(&h->lock, flags);
1284}
1285
ddd47442
MM		 1286/* This function will check the usage_count of the drive to be updated/added.
1287 * If the usage_count is zero then the drive information will be updated and
1288 * the disk will be re-registered with the kernel. If not then it will be
1289 * left alone for the next reboot. The exception to this is disk 0 which
1290 * will always be left registered with the kernel since it is also the
1291 * controller node. Any changes to disk 0 will show up on the next
1292 * reboot.
7c832835 1293 */
ddd47442 1294static void cciss_update_drive_info(int ctlr, int drv_index)
7c832835 1295{
ddd47442
MM		 1296 ctlr_info_t *h = hba[ctlr];
1297 struct gendisk *disk;
ddd47442
MM		 1298 InquiryData_struct *inq_buff = NULL;
1299 unsigned int block_size;
00988a35 1300 sector_t total_size;
ddd47442
MM		 1301 unsigned long flags = 0;
1302 int ret = 0;
1303
7c832835
BH		 1304 /* if the disk already exists then deregister it before proceeding */
1305 if (h->drv[drv_index].raid_level != -1) {
ddd47442
MM		 1306 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1307 h->drv[drv_index].busy_configuring = 1;
1308 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1309 ret = deregister_disk(h->gendisk[drv_index],
7c832835 1310 &h->drv[drv_index], 0);
ddd47442
MM		 1311 h->drv[drv_index].busy_configuring = 0;
1312 }
1313
1314 /* If the disk is in use return */
1315 if (ret)
1316 return;
1317
d14c4ab5 1318 /* Get information about the disk and modify the driver structure */
7c832835 1319 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
ddd47442
MM		 1320 if (inq_buff == NULL)
1321 goto mem_msg;
1322
97c06978
MMOD		 1323 /* testing to see if 16-byte CDBs are already being used */
1324 if (h->cciss_read == CCISS_READ_16) {
1325 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1326 &total_size, &block_size);
1327 goto geo_inq;
1328 }
1329
00988a35 1330 cciss_read_capacity(ctlr, drv_index, 1,
7c832835 1331 &total_size, &block_size);
00988a35 1332
97c06978
MMOD		 1333 /* if read_capacity returns all F's this volume is >2TB in size */
1334 /* so we switch to 16-byte CDB's for all read/write ops */
1335 if (total_size == 0xFFFFFFFFULL) {
00988a35
MMOD		 1336 cciss_read_capacity_16(ctlr, drv_index, 1,
1337 &total_size, &block_size);
1338 h->cciss_read = CCISS_READ_16;
1339 h->cciss_write = CCISS_WRITE_16;
1340 } else {
1341 h->cciss_read = CCISS_READ_10;
1342 h->cciss_write = CCISS_WRITE_10;
1343 }
97c06978 1344geo_inq:
ddd47442 1345 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
7c832835 1346 inq_buff, &h->drv[drv_index]);
ddd47442
MM		 1347
1348 ++h->num_luns;
1349 disk = h->gendisk[drv_index];
1350 set_capacity(disk, h->drv[drv_index].nr_blocks);
1351
ddd47442 1352 /* if it's the controller it's already added */
7c832835 1353 if (drv_index) {
ddd47442 1354 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
799202cb
MM		 1355 sprintf(disk->disk_name, "cciss/c%dd%d", ctlr, drv_index);
1356 disk->major = h->major;
1357 disk->first_minor = drv_index << NWD_SHIFT;
1358 disk->fops = &cciss_fops;
1359 disk->private_data = &h->drv[drv_index];
ddd47442
MM		 1360
1361 /* Set up queue information */
1362 disk->queue->backing_dev_info.ra_pages = READ_AHEAD;
1363 blk_queue_bounce_limit(disk->queue, hba[ctlr]->pdev->dma_mask);
1364
1365 /* This is a hardware imposed limit. */
1366 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1367
1368 /* This is a limit in the driver and could be eliminated. */
1369 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1370
92c4231a 1371 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
ddd47442 1372
ca1e0484
MM		 1373 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1374
ddd47442
MM		 1375 disk->queue->queuedata = hba[ctlr];
1376
1377 blk_queue_hardsect_size(disk->queue,
7c832835 1378 hba[ctlr]->drv[drv_index].block_size);
ddd47442
MM		 1379
1380 h->drv[drv_index].queue = disk->queue;
1381 add_disk(disk);
1382 }
1383
7c832835 1384 freeret:
ddd47442
MM		 1385 kfree(inq_buff);
1386 return;
7c832835 1387 mem_msg:
ddd47442
MM		 1388 printk(KERN_ERR "cciss: out of memory\n");
1389 goto freeret;
1390}
1391
1392/* This function will find the first index of the controllers drive array
1393 * that has a -1 for the raid_level and will return that index. This is
1394 * where new drives will be added. If the index to be returned is greater
1395 * than the highest_lun index for the controller then highest_lun is set
1396 * to this new index. If there are no available indexes then -1 is returned.
7c832835 1397 */
ddd47442
MM		 1398static int cciss_find_free_drive_index(int ctlr)
1399{
1400 int i;
1401
7c832835
BH		 1402 for (i = 0; i < CISS_MAX_LUN; i++) {
1403 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442
MM		 1404 if (i > hba[ctlr]->highest_lun)
1405 hba[ctlr]->highest_lun = i;
1406 return i;
1407 }
1408 }
1409 return -1;
1410}
1411
1412/* This function will add and remove logical drives from the Logical
d14c4ab5 1413 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1414 * so that mount points are preserved until the next reboot. This allows
1415 * for the removal of logical drives in the middle of the drive array
1416 * without a re-ordering of those drives.
1417 * INPUT
1418 * h = The controller to perform the operations on
1419 * del_disk = The disk to remove if specified. If the value given
1420 * is NULL then no disk is removed.
7c832835 1421 */
ddd47442 1422static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk)
1da177e4 1423{
ddd47442
MM		 1424 int ctlr = h->ctlr;
1425 int num_luns;
1426 ReportLunData_struct *ld_buff = NULL;
1427 drive_info_struct *drv = NULL;
1428 int return_code;
1429 int listlength = 0;
1430 int i;
1431 int drv_found;
1432 int drv_index = 0;
1433 __u32 lunid = 0;
1da177e4 1434 unsigned long flags;
ddd47442
MM		 1435
1436 /* Set busy_configuring flag for this operation */
1437 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 1438 if (h->busy_configuring) {
ddd47442
MM		 1439 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1440 return -EBUSY;
1441 }
1442 h->busy_configuring = 1;
1443
1444 /* if del_disk is NULL then we are being called to add a new disk
1445 * and update the logical drive table. If it is not NULL then
1446 * we will check if the disk is in use or not.
1447 */
7c832835 1448 if (del_disk != NULL) {
ddd47442
MM		 1449 drv = get_drv(del_disk);
1450 drv->busy_configuring = 1;
1451 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1452 return_code = deregister_disk(del_disk, drv, 1);
1453 drv->busy_configuring = 0;
1454 h->busy_configuring = 0;
1455 return return_code;
1456 } else {
1457 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1458 if (!capable(CAP_SYS_RAWIO))
1459 return -EPERM;
1460
1461 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1462 if (ld_buff == NULL)
1463 goto mem_msg;
1464
1465 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
7c832835
BH		 1466 sizeof(ReportLunData_struct), 0,
1467 0, 0, TYPE_CMD);
1468
1469 if (return_code == IO_OK) {
799202cb 1470 listlength =
4c1f2b31 1471 be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
7c832835 1472 } else { /* reading number of logical volumes failed */
ddd47442 1473 printk(KERN_WARNING "cciss: report logical volume"
7c832835 1474 " command failed\n");
ddd47442
MM		 1475 listlength = 0;
1476 goto freeret;
1477 }
1478
1479 num_luns = listlength / 8; /* 8 bytes per entry */
7c832835 1480 if (num_luns > CISS_MAX_LUN) {
ddd47442
MM		 1481 num_luns = CISS_MAX_LUN;
1482 printk(KERN_WARNING "cciss: more luns configured"
7c832835
BH		 1483 " on controller than can be handled by"
1484 " this driver.\n");
ddd47442
MM		 1485 }
1486
1487 /* Compare controller drive array to drivers drive array.
7c832835
BH		 1488 * Check for updates in the drive information and any new drives
1489 * on the controller.
1490 */
1491 for (i = 0; i < num_luns; i++) {
ddd47442
MM		 1492 int j;
1493
1494 drv_found = 0;
1495
7c832835
BH		 1496 lunid = (0xff &
1497 (unsigned int)(ld_buff->LUN[i][3])) << 24;
1498 lunid |= (0xff &
1499 (unsigned int)(ld_buff->LUN[i][2])) << 16;
1500 lunid |= (0xff &
1501 (unsigned int)(ld_buff->LUN[i][1])) << 8;
1502 lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);
ddd47442
MM		 1503
1504 /* Find if the LUN is already in the drive array
1505 * of the controller. If so then update its info
1506 * if not is use. If it does not exist then find
1507 * the first free index and add it.
7c832835
BH		 1508 */
1509 for (j = 0; j <= h->highest_lun; j++) {
1510 if (h->drv[j].LunID == lunid) {
ddd47442
MM		 1511 drv_index = j;
1512 drv_found = 1;
1513 }
1514 }
1515
1516 /* check if the drive was found already in the array */
7c832835 1517 if (!drv_found) {
ddd47442
MM		 1518 drv_index = cciss_find_free_drive_index(ctlr);
1519 if (drv_index == -1)
1520 goto freeret;
1521
799202cb
MM		 1522 /*Check if the gendisk needs to be allocated */
1523 if (!h->gendisk[drv_index]){
1524 h->gendisk[drv_index] = alloc_disk(1 << NWD_SHIFT);
1525 if (!h->gendisk[drv_index]){
1526 printk(KERN_ERR "cciss: could not allocate new disk %d\n", drv_index);
1527 goto mem_msg;
1528 }
1529 }
ddd47442
MM		 1530 }
1531 h->drv[drv_index].LunID = lunid;
1532 cciss_update_drive_info(ctlr, drv_index);
7c832835
BH		 1533 } /* end for */
1534 } /* end else */
ddd47442 1535
7c832835 1536 freeret:
ddd47442
MM		 1537 kfree(ld_buff);
1538 h->busy_configuring = 0;
1539 /* We return -1 here to tell the ACU that we have registered/updated
1540 * all of the drives that we can and to keep it from calling us
1541 * additional times.
7c832835 1542 */
ddd47442 1543 return -1;
7c832835 1544 mem_msg:
ddd47442
MM		 1545 printk(KERN_ERR "cciss: out of memory\n");
1546 goto freeret;
1547}
1548
1549/* This function will deregister the disk and it's queue from the
1550 * kernel. It must be called with the controller lock held and the
1551 * drv structures busy_configuring flag set. It's parameters are:
1552 *
1553 * disk = This is the disk to be deregistered
1554 * drv = This is the drive_info_struct associated with the disk to be
1555 * deregistered. It contains information about the disk used
1556 * by the driver.
1557 * clear_all = This flag determines whether or not the disk information
1558 * is going to be completely cleared out and the highest_lun
1559 * reset. Sometimes we want to clear out information about
d14c4ab5 1560 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 1561 * the highest_lun should be left unchanged and the LunID
1562 * should not be cleared.
1563*/
1564static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
1565 int clear_all)
1566{
799202cb 1567 int i;
1da177e4 1568 ctlr_info_t *h = get_host(disk);
1da177e4
LT		 1569
1570 if (!capable(CAP_SYS_RAWIO))
1571 return -EPERM;
1572
1da177e4 1573 /* make sure logical volume is NOT is use */
7c832835
BH		 1574 if (clear_all || (h->gendisk[0] == disk)) {
1575 if (drv->usage_count > 1)
1576 return -EBUSY;
1577 } else if (drv->usage_count > 0)
1578 return -EBUSY;
1da177e4 1579
ddd47442
MM		 1580 /* invalidate the devices and deregister the disk. If it is disk
1581 * zero do not deregister it but just zero out it's values. This
1582 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 1583 */
1584 if (h->gendisk[0] != disk) {
6f5a0f7c 1585 if (disk) {
165125e1 1586 struct request_queue *q = disk->queue;
6f5a0f7c 1587 if (disk->flags & GENHD_FL_UP)
1588 del_gendisk(disk);
2f6331fa 1589 if (q) {
6f5a0f7c 1590 blk_cleanup_queue(q);
799202cb
MM		 1591 /* Set drv->queue to NULL so that we do not try
1592 * to call blk_start_queue on this queue in the
1593 * interrupt handler
1594 */
2f6331fa
MM		 1595 drv->queue = NULL;
1596 }
799202cb
MM		 1597 /* If clear_all is set then we are deleting the logical
1598 * drive, not just refreshing its info. For drives
1599 * other than disk 0 we will call put_disk. We do not
1600 * do this for disk 0 as we need it to be able to
1601 * configure the controller.
1602 */
1603 if (clear_all){
1604 /* This isn't pretty, but we need to find the
1605 * disk in our array and NULL our the pointer.
1606 * This is so that we will call alloc_disk if
1607 * this index is used again later.
1608 */
1609 for (i=0; i < CISS_MAX_LUN; i++){
1610 if(h->gendisk[i] == disk){
1611 h->gendisk[i] = NULL;
1612 break;
1613 }
1614 }
1615 put_disk(disk);
1616 }
ddd47442 1617 }
799202cb
MM		 1618 } else {
1619 set_capacity(disk, 0);
ddd47442
MM		 1620 }
1621
1622 --h->num_luns;
1623 /* zero out the disk size info */
1624 drv->nr_blocks = 0;
1625 drv->block_size = 0;
1626 drv->heads = 0;
1627 drv->sectors = 0;
1628 drv->cylinders = 0;
1629 drv->raid_level = -1; /* This can be used as a flag variable to
1630 * indicate that this element of the drive
1631 * array is free.
7c832835
BH		 1632 */
1633
1634 if (clear_all) {
1635 /* check to see if it was the last disk */
1636 if (drv == h->drv + h->highest_lun) {
1637 /* if so, find the new hightest lun */
1638 int i, newhighest = -1;
1639 for (i = 0; i < h->highest_lun; i++) {
1640 /* if the disk has size > 0, it is available */
ddd47442 1641 if (h->drv[i].heads)
7c832835
BH		 1642 newhighest = i;
1643 }
1644 h->highest_lun = newhighest;
1da177e4 1645 }
ddd47442 1646
7c832835 1647 drv->LunID = 0;
ddd47442 1648 }
e2019b58 1649 return 0;
1da177e4 1650}
ddd47442 1651
7c832835
BH		 1652static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
1653 1: address logical volume log_unit,
1654 2: periph device address is scsi3addr */
1655 unsigned int log_unit, __u8 page_code,
1656 unsigned char *scsi3addr, int cmd_type)
1da177e4 1657{
7c832835 1658 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 1659 u64bit buff_dma_handle;
1660 int status = IO_OK;
1661
1662 c->cmd_type = CMD_IOCTL_PEND;
1663 c->Header.ReplyQueue = 0;
7c832835 1664 if (buff != NULL) {
1da177e4 1665 c->Header.SGList = 1;
7c832835 1666 c->Header.SGTotal = 1;
1da177e4
LT		 1667 } else {
1668 c->Header.SGList = 0;
7c832835 1669 c->Header.SGTotal = 0;
1da177e4
LT		 1670 }
1671 c->Header.Tag.lower = c->busaddr;
1672
1673 c->Request.Type.Type = cmd_type;
1674 if (cmd_type == TYPE_CMD) {
7c832835
BH		 1675 switch (cmd) {
1676 case CISS_INQUIRY:
1da177e4 1677 /* If the logical unit number is 0 then, this is going
7c832835
BH		 1678 to controller so It's a physical command
1679 mode = 0 target = 0. So we have nothing to write.
1680 otherwise, if use_unit_num == 1,
1681 mode = 1(volume set addressing) target = LUNID
1682 otherwise, if use_unit_num == 2,
1683 mode = 0(periph dev addr) target = scsi3addr */
1da177e4 1684 if (use_unit_num == 1) {
7c832835
BH		 1685 c->Header.LUN.LogDev.VolId =
1686 h->drv[log_unit].LunID;
1687 c->Header.LUN.LogDev.Mode = 1;
1da177e4 1688 } else if (use_unit_num == 2) {
7c832835
BH		 1689 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
1690 8);
1da177e4
LT		 1691 c->Header.LUN.LogDev.Mode = 0;
1692 }
1693 /* are we trying to read a vital product page */
7c832835 1694 if (page_code != 0) {
1da177e4
LT		 1695 c->Request.CDB[1] = 0x01;
1696 c->Request.CDB[2] = page_code;
1697 }
1698 c->Request.CDBLen = 6;
7c832835 1699 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 1700 c->Request.Type.Direction = XFER_READ;
1701 c->Request.Timeout = 0;
7c832835
BH		 1702 c->Request.CDB[0] = CISS_INQUIRY;
1703 c->Request.CDB[4] = size & 0xFF;
1704 break;
1da177e4
LT		 1705 case CISS_REPORT_LOG:
1706 case CISS_REPORT_PHYS:
7c832835 1707 /* Talking to controller so It's a physical command
1da177e4 1708 mode = 00 target = 0. Nothing to write.
7c832835 1709 */
1da177e4
LT		 1710 c->Request.CDBLen = 12;
1711 c->Request.Type.Attribute = ATTR_SIMPLE;
1712 c->Request.Type.Direction = XFER_READ;
1713 c->Request.Timeout = 0;
1714 c->Request.CDB[0] = cmd;
7c832835 1715 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 1716 c->Request.CDB[7] = (size >> 16) & 0xFF;
1717 c->Request.CDB[8] = (size >> 8) & 0xFF;
1718 c->Request.CDB[9] = size & 0xFF;
1719 break;
1720
1721 case CCISS_READ_CAPACITY:
1722 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1723 c->Header.LUN.LogDev.Mode = 1;
1724 c->Request.CDBLen = 10;
1725 c->Request.Type.Attribute = ATTR_SIMPLE;
1726 c->Request.Type.Direction = XFER_READ;
1727 c->Request.Timeout = 0;
1728 c->Request.CDB[0] = cmd;
7c832835 1729 break;
00988a35
MMOD		 1730 case CCISS_READ_CAPACITY_16:
1731 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1732 c->Header.LUN.LogDev.Mode = 1;
1733 c->Request.CDBLen = 16;
1734 c->Request.Type.Attribute = ATTR_SIMPLE;
1735 c->Request.Type.Direction = XFER_READ;
1736 c->Request.Timeout = 0;
1737 c->Request.CDB[0] = cmd;
1738 c->Request.CDB[1] = 0x10;
1739 c->Request.CDB[10] = (size >> 24) & 0xFF;
1740 c->Request.CDB[11] = (size >> 16) & 0xFF;
1741 c->Request.CDB[12] = (size >> 8) & 0xFF;
1742 c->Request.CDB[13] = size & 0xFF;
1743 c->Request.Timeout = 0;
1744 c->Request.CDB[0] = cmd;
1745 break;
1da177e4
LT		 1746 case CCISS_CACHE_FLUSH:
1747 c->Request.CDBLen = 12;
1748 c->Request.Type.Attribute = ATTR_SIMPLE;
1749 c->Request.Type.Direction = XFER_WRITE;
1750 c->Request.Timeout = 0;
1751 c->Request.CDB[0] = BMIC_WRITE;
1752 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 1753 break;
1da177e4
LT		 1754 default:
1755 printk(KERN_WARNING
7c832835 1756 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 1757 return IO_ERROR;
1da177e4
LT		 1758 }
1759 } else if (cmd_type == TYPE_MSG) {
1760 switch (cmd) {
7c832835 1761 case 0: /* ABORT message */
3da8b713 1762 c->Request.CDBLen = 12;
1763 c->Request.Type.Attribute = ATTR_SIMPLE;
1764 c->Request.Type.Direction = XFER_WRITE;
1765 c->Request.Timeout = 0;
7c832835
BH		 1766 c->Request.CDB[0] = cmd; /* abort */
1767 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 1768 /* buff contains the tag of the command to abort */
1769 memcpy(&c->Request.CDB[4], buff, 8);
1770 break;
7c832835 1771 case 1: /* RESET message */
3da8b713 1772 c->Request.CDBLen = 12;
1773 c->Request.Type.Attribute = ATTR_SIMPLE;
1774 c->Request.Type.Direction = XFER_WRITE;
1775 c->Request.Timeout = 0;
1776 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835
BH		 1777 c->Request.CDB[0] = cmd; /* reset */
1778 c->Request.CDB[1] = 0x04; /* reset a LUN */
00988a35 1779 break;
1da177e4
LT		 1780 case 3: /* No-Op message */
1781 c->Request.CDBLen = 1;
1782 c->Request.Type.Attribute = ATTR_SIMPLE;
1783 c->Request.Type.Direction = XFER_WRITE;
1784 c->Request.Timeout = 0;
1785 c->Request.CDB[0] = cmd;
1786 break;
1787 default:
1788 printk(KERN_WARNING
7c832835 1789 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 1790 return IO_ERROR;
1791 }
1792 } else {
1793 printk(KERN_WARNING
7c832835 1794 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 1795 return IO_ERROR;
1796 }
1797 /* Fill in the scatter gather information */
1798 if (size > 0) {
1799 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 1800 buff, size,
1801 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 1802 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
1803 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
1804 c->SG[0].Len = size;
7c832835 1805 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 1806 }
1807 return status;
1808}
7c832835
BH		 1809
1810static int sendcmd_withirq(__u8 cmd,
1811 int ctlr,
1812 void *buff,
1813 size_t size,
1814 unsigned int use_unit_num,
1815 unsigned int log_unit, __u8 page_code, int cmd_type)
1da177e4
LT		 1816{
1817 ctlr_info_t *h = hba[ctlr];
1818 CommandList_struct *c;
7c832835 1819 u64bit buff_dma_handle;
1da177e4
LT		 1820 unsigned long flags;
1821 int return_status;
6e9a4738 1822 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1823
1824 if ((c = cmd_alloc(h, 0)) == NULL)
1da177e4
LT		 1825 return -ENOMEM;
1826 return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
7c832835 1827 log_unit, page_code, NULL, cmd_type);
1da177e4
LT		 1828 if (return_status != IO_OK) {
1829 cmd_free(h, c, 0);
1830 return return_status;
1831 }
7c832835 1832 resend_cmd2:
1da177e4 1833 c->waiting = &wait;
7c832835 1834
1da177e4
LT		 1835 /* Put the request on the tail of the queue and send it */
1836 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1837 addQ(&h->reqQ, c);
1838 h->Qdepth++;
1839 start_io(h);
1840 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
7c832835 1841
1da177e4
LT		 1842 wait_for_completion(&wait);
1843
7c832835
BH		 1844 if (c->err_info->CommandStatus != 0) { /* an error has occurred */
1845 switch (c->err_info->CommandStatus) {
1846 case CMD_TARGET_STATUS:
1847 printk(KERN_WARNING "cciss: cmd %p has "
1848 " completed with errors\n", c);
1849 if (c->err_info->ScsiStatus) {
1850 printk(KERN_WARNING "cciss: cmd %p "
1851 "has SCSI Status = %x\n",
1852 c, c->err_info->ScsiStatus);
1853 }
1da177e4
LT		 1854
1855 break;
7c832835
BH		 1856 case CMD_DATA_UNDERRUN:
1857 case CMD_DATA_OVERRUN:
1da177e4
LT		 1858 /* expected for inquire and report lun commands */
1859 break;
7c832835
BH		 1860 case CMD_INVALID:
1861 printk(KERN_WARNING "cciss: Cmd %p is "
1862 "reported invalid\n", c);
1863 return_status = IO_ERROR;
1da177e4 1864 break;
7c832835
BH		 1865 case CMD_PROTOCOL_ERR:
1866 printk(KERN_WARNING "cciss: cmd %p has "
1867 "protocol error \n", c);
1868 return_status = IO_ERROR;
1da177e4 1869 break;
7c832835
BH		 1870 case CMD_HARDWARE_ERR:
1871 printk(KERN_WARNING "cciss: cmd %p had "
1872 " hardware error\n", c);
1873 return_status = IO_ERROR;
1da177e4 1874 break;
7c832835
BH		 1875 case CMD_CONNECTION_LOST:
1876 printk(KERN_WARNING "cciss: cmd %p had "
1877 "connection lost\n", c);
1878 return_status = IO_ERROR;
1da177e4 1879 break;
7c832835
BH		 1880 case CMD_ABORTED:
1881 printk(KERN_WARNING "cciss: cmd %p was "
1882 "aborted\n", c);
1883 return_status = IO_ERROR;
1da177e4 1884 break;
7c832835
BH		 1885 case CMD_ABORT_FAILED:
1886 printk(KERN_WARNING "cciss: cmd %p reports "
1887 "abort failed\n", c);
1888 return_status = IO_ERROR;
1889 break;
1890 case CMD_UNSOLICITED_ABORT:
1891 printk(KERN_WARNING
1892 "cciss%d: unsolicited abort %p\n", ctlr, c);
1893 if (c->retry_count < MAX_CMD_RETRIES) {
1894 printk(KERN_WARNING
1895 "cciss%d: retrying %p\n", ctlr, c);
1896 c->retry_count++;
1897 /* erase the old error information */
1898 memset(c->err_info, 0,
1899 sizeof(ErrorInfo_struct));
1900 return_status = IO_OK;
1901 INIT_COMPLETION(wait);
1902 goto resend_cmd2;
1903 }
1904 return_status = IO_ERROR;
1905 break;
1906 default:
1907 printk(KERN_WARNING "cciss: cmd %p returned "
1908 "unknown status %x\n", c,
1909 c->err_info->CommandStatus);
1910 return_status = IO_ERROR;
1da177e4 1911 }
7c832835 1912 }
1da177e4 1913 /* unlock the buffers from DMA */
bb2a37bf
MM		 1914 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
1915 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 1916 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
1917 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
1da177e4 1918 cmd_free(h, c, 0);
7c832835 1919 return return_status;
1da177e4 1920}
7c832835 1921
1da177e4 1922static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 1923 int withirq, sector_t total_size,
7c832835
BH		 1924 unsigned int block_size,
1925 InquiryData_struct *inq_buff,
1926 drive_info_struct *drv)
1da177e4
LT		 1927{
1928 int return_code;
00988a35 1929 unsigned long t;
00988a35 1930
1da177e4
LT		 1931 memset(inq_buff, 0, sizeof(InquiryData_struct));
1932 if (withirq)
1933 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
7c832835
BH		 1934 inq_buff, sizeof(*inq_buff), 1,
1935 logvol, 0xC1, TYPE_CMD);
1da177e4
LT		 1936 else
1937 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
7c832835
BH		 1938 sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
1939 TYPE_CMD);
1da177e4 1940 if (return_code == IO_OK) {
7c832835 1941 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 1942 printk(KERN_WARNING
7c832835
BH		 1943 "cciss: reading geometry failed, volume "
1944 "does not support reading geometry\n");
1da177e4 1945 drv->heads = 255;
7c832835 1946 drv->sectors = 32; // Sectors per track
7f42d3b8 1947 drv->cylinders = total_size + 1;
89f97ad1 1948 drv->raid_level = RAID_UNKNOWN;
1da177e4 1949 } else {
1da177e4
LT		 1950 drv->heads = inq_buff->data_byte[6];
1951 drv->sectors = inq_buff->data_byte[7];
1952 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
1953 drv->cylinders += inq_buff->data_byte[5];
1954 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 1955 }
1956 drv->block_size = block_size;
97c06978 1957 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 1958 t = drv->heads * drv->sectors;
1959 if (t > 1) {
97c06978
MMOD		 1960 sector_t real_size = total_size + 1;
1961 unsigned long rem = sector_div(real_size, t);
3f7705ea 1962 if (rem)
97c06978
MMOD		 1963 real_size++;
1964 drv->cylinders = real_size;
1da177e4 1965 }
7c832835 1966 } else { /* Get geometry failed */
1da177e4
LT		 1967 printk(KERN_WARNING "cciss: reading geometry failed\n");
1968 }
cc088d10 1969 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 1970 drv->heads, drv->sectors, drv->cylinders);
1da177e4 1971}
7c832835 1972
1da177e4 1973static void
00988a35 1974cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 1975 unsigned int *block_size)
1da177e4 1976{
00988a35 1977 ReadCapdata_struct *buf;
1da177e4 1978 int return_code;
1aebe187
MK		 1979
1980 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
1981 if (!buf) {
00988a35
MMOD		 1982 printk(KERN_WARNING "cciss: out of memory\n");
1983 return;
1984 }
1aebe187 1985
1da177e4
LT		 1986 if (withirq)
1987 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35
MMOD		 1988 ctlr, buf, sizeof(ReadCapdata_struct),
1989 1, logvol, 0, TYPE_CMD);
1da177e4
LT		 1990 else
1991 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35
MMOD		 1992 ctlr, buf, sizeof(ReadCapdata_struct),
1993 1, logvol, 0, NULL, TYPE_CMD);
1da177e4 1994 if (return_code == IO_OK) {
4c1f2b31
AV		 1995 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
1996 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 1997 } else { /* read capacity command failed */
1da177e4
LT		 1998 printk(KERN_WARNING "cciss: read capacity failed\n");
1999 *total_size = 0;
2000 *block_size = BLOCK_SIZE;
2001 }
97c06978 2002 if (*total_size != 0)
7b92aadf 2003 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2004 (unsigned long long)*total_size+1, *block_size);
00988a35 2005 kfree(buf);
00988a35
MMOD		 2006}
2007
2008static void
2009cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2010{
2011 ReadCapdata_struct_16 *buf;
2012 int return_code;
1aebe187
MK		 2013
2014 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2015 if (!buf) {
00988a35
MMOD		 2016 printk(KERN_WARNING "cciss: out of memory\n");
2017 return;
2018 }
1aebe187 2019
00988a35
MMOD		 2020 if (withirq) {
2021 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2022 ctlr, buf, sizeof(ReadCapdata_struct_16),
2023 1, logvol, 0, TYPE_CMD);
2024 }
2025 else {
2026 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2027 ctlr, buf, sizeof(ReadCapdata_struct_16),
2028 1, logvol, 0, NULL, TYPE_CMD);
2029 }
2030 if (return_code == IO_OK) {
4c1f2b31
AV		 2031 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2032 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2033 } else { /* read capacity command failed */
2034 printk(KERN_WARNING "cciss: read capacity failed\n");
2035 *total_size = 0;
2036 *block_size = BLOCK_SIZE;
2037 }
7b92aadf 2038 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2039 (unsigned long long)*total_size+1, *block_size);
00988a35 2040 kfree(buf);
1da177e4
LT		 2041}
2042
1da177e4
LT		 2043static int cciss_revalidate(struct gendisk *disk)
2044{
2045 ctlr_info_t *h = get_host(disk);
2046 drive_info_struct *drv = get_drv(disk);
2047 int logvol;
7c832835 2048 int FOUND = 0;
1da177e4 2049 unsigned int block_size;
00988a35 2050 sector_t total_size;
1da177e4
LT		 2051 InquiryData_struct *inq_buff = NULL;
2052
7c832835
BH		 2053 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2054 if (h->drv[logvol].LunID == drv->LunID) {
2055 FOUND = 1;
1da177e4
LT		 2056 break;
2057 }
2058 }
2059
7c832835
BH		 2060 if (!FOUND)
2061 return 1;
1da177e4 2062
7c832835
BH		 2063 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2064 if (inq_buff == NULL) {
2065 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2066 return 1;
2067 }
00988a35
MMOD		 2068 if (h->cciss_read == CCISS_READ_10) {
2069 cciss_read_capacity(h->ctlr, logvol, 1,
2070 &total_size, &block_size);
2071 } else {
2072 cciss_read_capacity_16(h->ctlr, logvol, 1,
2073 &total_size, &block_size);
2074 }
7c832835
BH		 2075 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2076 inq_buff, drv);
1da177e4 2077
ad2b9312 2078 blk_queue_hardsect_size(drv->queue, drv->block_size);
1da177e4
LT		 2079 set_capacity(disk, drv->nr_blocks);
2080
1da177e4
LT		 2081 kfree(inq_buff);
2082 return 0;
2083}
2084
2085/*
2086 * Wait polling for a command to complete.
2087 * The memory mapped FIFO is polled for the completion.
2088 * Used only at init time, interrupts from the HBA are disabled.
2089 */
2090static unsigned long pollcomplete(int ctlr)
2091{
2092 unsigned long done;
2093 int i;
2094
2095 /* Wait (up to 20 seconds) for a command to complete */
2096
2097 for (i = 20 * HZ; i > 0; i--) {
2098 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2099 if (done == FIFO_EMPTY)
2100 schedule_timeout_uninterruptible(1);
2101 else
e2019b58 2102 return done;
1da177e4
LT		 2103 }
2104 /* Invalid address to tell caller we ran out of time */
2105 return 1;
2106}
3da8b713 2107
2108static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2109{
2110 /* We get in here if sendcmd() is polling for completions
7c832835
BH		 2111 and gets some command back that it wasn't expecting --
2112 something other than that which it just sent down.
2113 Ordinarily, that shouldn't happen, but it can happen when
3da8b713 2114 the scsi tape stuff gets into error handling mode, and
7c832835 2115 starts using sendcmd() to try to abort commands and
3da8b713 2116 reset tape drives. In that case, sendcmd may pick up
2117 completions of commands that were sent to logical drives
7c832835 2118 through the block i/o system, or cciss ioctls completing, etc.
3da8b713 2119 In that case, we need to save those completions for later
2120 processing by the interrupt handler.
7c832835 2121 */
3da8b713 2122
2123#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 2124 struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
3da8b713 2125
2126 /* If it's not the scsi tape stuff doing error handling, (abort */
2127 /* or reset) then we don't expect anything weird. */
2128 if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2129#endif
7c832835
BH		 2130 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2131 "Invalid command list address returned! (%lx)\n",
2132 ctlr, complete);
3da8b713 2133 /* not much we can do. */
2134#ifdef CONFIG_CISS_SCSI_TAPE
2135 return 1;
2136 }
2137
2138 /* We've sent down an abort or reset, but something else
2139 has completed */
f880632f 2140 if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
3da8b713 2141 /* Uh oh. No room to save it for later... */
2142 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
7c832835 2143 "reject list overflow, command lost!\n", ctlr);
3da8b713 2144 return 1;
2145 }
2146 /* Save it for later */
2147 srl->complete[srl->ncompletions] = complete;
2148 srl->ncompletions++;
2149#endif
2150 return 0;
2151}
2152
1da177e4 2153/*
7c832835
BH		 2154 * Send a command to the controller, and wait for it to complete.
2155 * Only used at init time.
1da177e4 2156 */
7c832835
BH		 2157static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
2158 1: address logical volume log_unit,
2159 2: periph device address is scsi3addr */
2160 unsigned int log_unit,
2161 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
1da177e4
LT		 2162{
2163 CommandList_struct *c;
2164 int i;
2165 unsigned long complete;
7c832835 2166 ctlr_info_t *info_p = hba[ctlr];
1da177e4 2167 u64bit buff_dma_handle;
3da8b713 2168 int status, done = 0;
1da177e4
LT		 2169
2170 if ((c = cmd_alloc(info_p, 1)) == NULL) {
2171 printk(KERN_WARNING "cciss: unable to get memory");
e2019b58 2172 return IO_ERROR;
1da177e4
LT		 2173 }
2174 status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
7c832835 2175 log_unit, page_code, scsi3addr, cmd_type);
1da177e4
LT		 2176 if (status != IO_OK) {
2177 cmd_free(info_p, c, 1);
2178 return status;
2179 }
7c832835 2180 resend_cmd1:
1da177e4 2181 /*
7c832835
BH		 2182 * Disable interrupt
2183 */
1da177e4
LT		 2184#ifdef CCISS_DEBUG
2185 printk(KERN_DEBUG "cciss: turning intr off\n");
7c832835
BH		 2186#endif /* CCISS_DEBUG */
2187 info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
2188
1da177e4 2189 /* Make sure there is room in the command FIFO */
7c832835 2190 /* Actually it should be completely empty at this time */
3da8b713 2191 /* unless we are in here doing error handling for the scsi */
2192 /* tape side of the driver. */
7c832835 2193 for (i = 200000; i > 0; i--) {
1da177e4 2194 /* if fifo isn't full go */
7c832835
BH		 2195 if (!(info_p->access.fifo_full(info_p))) {
2196
2197 break;
2198 }
2199 udelay(10);
2200 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
2201 " waiting!\n", ctlr);
2202 }
2203 /*
2204 * Send the cmd
2205 */
2206 info_p->access.submit_command(info_p, c);
3da8b713 2207 done = 0;
2208 do {
2209 complete = pollcomplete(ctlr);
1da177e4
LT		 2210
2211#ifdef CCISS_DEBUG
3da8b713 2212 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2213#endif /* CCISS_DEBUG */
1da177e4 2214
3da8b713 2215 if (complete == 1) {
7c832835
BH		 2216 printk(KERN_WARNING
2217 "cciss cciss%d: SendCmd Timeout out, "
2218 "No command list address returned!\n", ctlr);
3da8b713 2219 status = IO_ERROR;
2220 done = 1;
2221 break;
2222 }
2223
2224 /* This will need to change for direct lookup completions */
7c832835
BH		 2225 if ((complete & CISS_ERROR_BIT)
2226 && (complete & ~CISS_ERROR_BIT) == c->busaddr) {
2227 /* if data overrun or underun on Report command
2228 ignore it
2229 */
1da177e4
LT		 2230 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2231 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2232 (c->Request.CDB[0] == CISS_INQUIRY)) &&
7c832835
BH		 2233 ((c->err_info->CommandStatus ==
2234 CMD_DATA_OVERRUN) ||
2235 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN)
2236 )) {
1da177e4
LT		 2237 complete = c->busaddr;
2238 } else {
2239 if (c->err_info->CommandStatus ==
7c832835 2240 CMD_UNSOLICITED_ABORT) {
1da177e4 2241 printk(KERN_WARNING "cciss%d: "
7c832835
BH		 2242 "unsolicited abort %p\n",
2243 ctlr, c);
1da177e4
LT		 2244 if (c->retry_count < MAX_CMD_RETRIES) {
2245 printk(KERN_WARNING
7c832835
BH		 2246 "cciss%d: retrying %p\n",
2247 ctlr, c);
1da177e4
LT		 2248 c->retry_count++;
2249 /* erase the old error */
2250 /* information */
2251 memset(c->err_info, 0,
7c832835
BH		 2252 sizeof
2253 (ErrorInfo_struct));
1da177e4
LT		 2254 goto resend_cmd1;
2255 } else {
2256 printk(KERN_WARNING
7c832835
BH		 2257 "cciss%d: retried %p too "
2258 "many times\n", ctlr, c);
1da177e4
LT		 2259 status = IO_ERROR;
2260 goto cleanup1;
2261 }
7c832835
BH		 2262 } else if (c->err_info->CommandStatus ==
2263 CMD_UNABORTABLE) {
2264 printk(KERN_WARNING
2265 "cciss%d: command could not be aborted.\n",
2266 ctlr);
3da8b713 2267 status = IO_ERROR;
2268 goto cleanup1;
1da177e4
LT		 2269 }
2270 printk(KERN_WARNING "ciss ciss%d: sendcmd"
7c832835
BH		 2271 " Error %x \n", ctlr,
2272 c->err_info->CommandStatus);
1da177e4 2273 printk(KERN_WARNING "ciss ciss%d: sendcmd"
7c832835
BH		 2274 " offensive info\n"
2275 " size %x\n num %x value %x\n",
2276 ctlr,
2277 c->err_info->MoreErrInfo.Invalid_Cmd.
2278 offense_size,
2279 c->err_info->MoreErrInfo.Invalid_Cmd.
2280 offense_num,
2281 c->err_info->MoreErrInfo.Invalid_Cmd.
2282 offense_value);
1da177e4
LT		 2283 status = IO_ERROR;
2284 goto cleanup1;
2285 }
2286 }
3da8b713 2287 /* This will need changing for direct lookup completions */
7c832835 2288 if (complete != c->busaddr) {
3da8b713 2289 if (add_sendcmd_reject(cmd, ctlr, complete) != 0) {
7c832835 2290 BUG(); /* we are pretty much hosed if we get here. */
3da8b713 2291 }
2292 continue;
7c832835 2293 } else
3da8b713 2294 done = 1;
7c832835
BH		 2295 } while (!done);
2296
2297 cleanup1:
1da177e4 2298 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2299 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2300 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
1da177e4 2301 pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2302 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
3da8b713 2303#ifdef CONFIG_CISS_SCSI_TAPE
2304 /* if we saved some commands for later, process them now. */
2305 if (info_p->scsi_rejects.ncompletions > 0)
7d12e780 2306 do_cciss_intr(0, info_p);
3da8b713 2307#endif
1da177e4 2308 cmd_free(info_p, c, 1);
e2019b58 2309 return status;
7c832835
BH		 2310}
2311
1da177e4
LT		 2312/*
2313 * Map (physical) PCI mem into (virtual) kernel space
2314 */
2315static void __iomem *remap_pci_mem(ulong base, ulong size)
2316{
7c832835
BH		 2317 ulong page_base = ((ulong) base) & PAGE_MASK;
2318 ulong page_offs = ((ulong) base) - page_base;
2319 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2320
7c832835 2321 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2322}
2323
7c832835
BH		 2324/*
2325 * Takes jobs of the Q and sends them to the hardware, then puts it on
2326 * the Q to wait for completion.
2327 */
2328static void start_io(ctlr_info_t *h)
1da177e4
LT		 2329{
2330 CommandList_struct *c;
7c832835
BH		 2331
2332 while ((c = h->reqQ) != NULL) {
1da177e4
LT		 2333 /* can't do anything if fifo is full */
2334 if ((h->access.fifo_full(h))) {
2335 printk(KERN_WARNING "cciss: fifo full\n");
2336 break;
2337 }
2338
7c832835 2339 /* Get the first entry from the Request Q */
1da177e4
LT		 2340 removeQ(&(h->reqQ), c);
2341 h->Qdepth--;
7c832835
BH		 2342
2343 /* Tell the controller execute command */
1da177e4 2344 h->access.submit_command(h, c);
7c832835
BH		 2345
2346 /* Put job onto the completed Q */
2347 addQ(&(h->cmpQ), c);
1da177e4
LT		 2348 }
2349}
7c832835 2350
1da177e4
LT		 2351/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2352/* Zeros out the error record and then resends the command back */
2353/* to the controller */
7c832835 2354static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2355{
2356 /* erase the old error information */
2357 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2358
2359 /* add it to software queue and then send it to the controller */
7c832835 2360 addQ(&(h->reqQ), c);
1da177e4 2361 h->Qdepth++;
7c832835 2362 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2363 h->maxQsinceinit = h->Qdepth;
2364
2365 start_io(h);
2366}
a9925a06 2367
03bbfee5
MMOD		 2368static inline int evaluate_target_status(CommandList_struct *cmd)
2369{
2370 unsigned char sense_key;
198b7660 2371 int error_count = 1;
03bbfee5
MMOD		 2372
2373 if (cmd->err_info->ScsiStatus != 0x02) { /* not check condition? */
2374 if (!blk_pc_request(cmd->rq))
2375 printk(KERN_WARNING "cciss: cmd %p "
2376 "has SCSI Status 0x%x\n",
2377 cmd, cmd->err_info->ScsiStatus);
198b7660 2378 return error_count;
03bbfee5
MMOD		 2379 }
2380
2381 /* check the sense key */
2382 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2383 /* no status or recovered error */
2384 if ((sense_key == 0x0) || (sense_key == 0x1))
198b7660 2385 error_count = 0;
03bbfee5
MMOD		 2386
2387 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
198b7660 2388 if (error_count != 0)
03bbfee5
MMOD		 2389 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2390 " sense key = 0x%x\n", cmd, sense_key);
198b7660 2391 return error_count;
03bbfee5
MMOD		 2392 }
2393
2394 /* SG_IO or similar, copy sense data back */
2395 if (cmd->rq->sense) {
2396 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2397 cmd->rq->sense_len = cmd->err_info->SenseLen;
2398 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2399 cmd->rq->sense_len);
2400 } else
2401 cmd->rq->sense_len = 0;
2402
198b7660 2403 return error_count;
03bbfee5
MMOD		 2404}
2405
7c832835 2406/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 2407 * buffers for the completed job. Note that this function does not need
2408 * to hold the hba/queue lock.
7c832835
BH		 2409 */
2410static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2411 int timeout)
1da177e4 2412{
1da177e4 2413 int retry_cmd = 0;
198b7660
MMOD		 2414 struct request *rq = cmd->rq;
2415
2416 rq->errors = 0;
7c832835 2417
1da177e4 2418 if (timeout)
198b7660 2419 rq->errors = 1;
1da177e4 2420
d38ae168
MMOD		 2421 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2422 goto after_error_processing;
7c832835 2423
d38ae168 2424 switch (cmd->err_info->CommandStatus) {
d38ae168 2425 case CMD_TARGET_STATUS:
198b7660 2426 rq->errors = evaluate_target_status(cmd);
d38ae168
MMOD		 2427 break;
2428 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 2429 if (blk_fs_request(cmd->rq)) {
2430 printk(KERN_WARNING "cciss: cmd %p has"
2431 " completed with data underrun "
2432 "reported\n", cmd);
2433 cmd->rq->data_len = cmd->err_info->ResidualCnt;
2434 }
d38ae168
MMOD		 2435 break;
2436 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 2437 if (blk_fs_request(cmd->rq))
2438 printk(KERN_WARNING "cciss: cmd %p has"
2439 " completed with data overrun "
2440 "reported\n", cmd);
d38ae168
MMOD		 2441 break;
2442 case CMD_INVALID:
2443 printk(KERN_WARNING "cciss: cmd %p is "
2444 "reported invalid\n", cmd);
198b7660 2445 rq->errors = 1;
d38ae168
MMOD		 2446 break;
2447 case CMD_PROTOCOL_ERR:
2448 printk(KERN_WARNING "cciss: cmd %p has "
2449 "protocol error \n", cmd);
198b7660 2450 rq->errors = 1;
d38ae168
MMOD		 2451 break;
2452 case CMD_HARDWARE_ERR:
2453 printk(KERN_WARNING "cciss: cmd %p had "
2454 " hardware error\n", cmd);
198b7660 2455 rq->errors = 1;
d38ae168
MMOD		 2456 break;
2457 case CMD_CONNECTION_LOST:
2458 printk(KERN_WARNING "cciss: cmd %p had "
2459 "connection lost\n", cmd);
198b7660 2460 rq->errors = 1;
d38ae168
MMOD		 2461 break;
2462 case CMD_ABORTED:
2463 printk(KERN_WARNING "cciss: cmd %p was "
2464 "aborted\n", cmd);
198b7660 2465 rq->errors = 1;
d38ae168
MMOD		 2466 break;
2467 case CMD_ABORT_FAILED:
2468 printk(KERN_WARNING "cciss: cmd %p reports "
2469 "abort failed\n", cmd);
198b7660 2470 rq->errors = 1;
d38ae168
MMOD		 2471 break;
2472 case CMD_UNSOLICITED_ABORT:
2473 printk(KERN_WARNING "cciss%d: unsolicited "
2474 "abort %p\n", h->ctlr, cmd);
2475 if (cmd->retry_count < MAX_CMD_RETRIES) {
2476 retry_cmd = 1;
2477 printk(KERN_WARNING
2478 "cciss%d: retrying %p\n", h->ctlr, cmd);
2479 cmd->retry_count++;
2480 } else
2481 printk(KERN_WARNING
2482 "cciss%d: %p retried too "
2483 "many times\n", h->ctlr, cmd);
198b7660 2484 rq->errors = 1;
d38ae168
MMOD		 2485 break;
2486 case CMD_TIMEOUT:
2487 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
198b7660 2488 rq->errors = 1;
d38ae168
MMOD		 2489 break;
2490 default:
2491 printk(KERN_WARNING "cciss: cmd %p returned "
2492 "unknown status %x\n", cmd,
2493 cmd->err_info->CommandStatus);
198b7660 2494 rq->errors = 1;
1da177e4 2495 }
d38ae168
MMOD		 2496
2497after_error_processing:
2498
1da177e4 2499 /* We need to return this command */
7c832835
BH		 2500 if (retry_cmd) {
2501 resend_cciss_cmd(h, cmd);
1da177e4 2502 return;
7c832835 2503 }
03bbfee5 2504 cmd->rq->data_len = 0;
03bbfee5 2505 cmd->rq->completion_data = cmd;
2056a782 2506 blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
a9925a06 2507 blk_complete_request(cmd->rq);
1da177e4
LT		 2508}
2509
7c832835
BH		 2510/*
2511 * Get a request and submit it to the controller.
1da177e4 2512 */
165125e1 2513static void do_cciss_request(struct request_queue *q)
1da177e4 2514{
7c832835 2515 ctlr_info_t *h = q->queuedata;
1da177e4 2516 CommandList_struct *c;
00988a35
MMOD		 2517 sector_t start_blk;
2518 int seg;
1da177e4
LT		 2519 struct request *creq;
2520 u64bit temp64;
2521 struct scatterlist tmp_sg[MAXSGENTRIES];
2522 drive_info_struct *drv;
2523 int i, dir;
2524
2525 /* We call start_io here in case there is a command waiting on the
2526 * queue that has not been sent.
7c832835 2527 */
1da177e4
LT		 2528 if (blk_queue_plugged(q))
2529 goto startio;
2530
7c832835 2531 queue:
1da177e4
LT		 2532 creq = elv_next_request(q);
2533 if (!creq)
2534 goto startio;
2535
089fe1b2 2536 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 2537
7c832835 2538 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 2539 goto full;
2540
2541 blkdev_dequeue_request(creq);
2542
2543 spin_unlock_irq(q->queue_lock);
2544
2545 c->cmd_type = CMD_RWREQ;
2546 c->rq = creq;
7c832835
BH		 2547
2548 /* fill in the request */
1da177e4 2549 drv = creq->rq_disk->private_data;
7c832835 2550 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 2551 /* got command from pool, so use the command block index instead */
2552 /* for direct lookups. */
2553 /* The first 2 bits are reserved for controller error reporting. */
2554 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 2555 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
2556 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 2557 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 2558 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
2559 c->Request.Type.Type = TYPE_CMD; // It is a command.
2560 c->Request.Type.Attribute = ATTR_SIMPLE;
2561 c->Request.Type.Direction =
a52de245 2562 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 2563 c->Request.Timeout = 0; // Don't time out
2564 c->Request.CDB[0] =
00988a35 2565 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
1da177e4
LT		 2566 start_blk = creq->sector;
2567#ifdef CCISS_DEBUG
7c832835
BH		 2568 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", (int)creq->sector,
2569 (int)creq->nr_sectors);
2570#endif /* CCISS_DEBUG */
1da177e4 2571
a683d652 2572 memset(tmp_sg, 0, sizeof(tmp_sg));
1da177e4
LT		 2573 seg = blk_rq_map_sg(q, creq, tmp_sg);
2574
7c832835 2575 /* get the DMA records for the setup */
1da177e4
LT		 2576 if (c->Request.Type.Direction == XFER_READ)
2577 dir = PCI_DMA_FROMDEVICE;
2578 else
2579 dir = PCI_DMA_TODEVICE;
2580
7c832835 2581 for (i = 0; i < seg; i++) {
1da177e4
LT		 2582 c->SG[i].Len = tmp_sg[i].length;
2583 temp64.val = (__u64) pci_map_page(h->pdev, tmp_sg[i].page,
7c832835
BH		 2584 tmp_sg[i].offset,
2585 tmp_sg[i].length, dir);
1da177e4 2586 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 2587 c->SG[i].Addr.upper = temp64.val32.upper;
2588 c->SG[i].Ext = 0; // we are not chaining
1da177e4 2589 }
7c832835
BH		 2590 /* track how many SG entries we are using */
2591 if (seg > h->maxSG)
2592 h->maxSG = seg;
1da177e4
LT		 2593
2594#ifdef CCISS_DEBUG
7c832835
BH		 2595 printk(KERN_DEBUG "cciss: Submitting %d sectors in %d segments\n",
2596 creq->nr_sectors, seg);
2597#endif /* CCISS_DEBUG */
1da177e4
LT		 2598
2599 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 2600 if (likely(blk_fs_request(creq))) {
2601 if(h->cciss_read == CCISS_READ_10) {
2602 c->Request.CDB[1] = 0;
2603 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
2604 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
2605 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
2606 c->Request.CDB[5] = start_blk & 0xff;
2607 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
2608 c->Request.CDB[7] = (creq->nr_sectors >> 8) & 0xff;
2609 c->Request.CDB[8] = creq->nr_sectors & 0xff;
2610 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
2611 } else {
2612 c->Request.CDBLen = 16;
2613 c->Request.CDB[1]= 0;
2614 c->Request.CDB[2]= (start_blk >> 56) & 0xff; //MSB
2615 c->Request.CDB[3]= (start_blk >> 48) & 0xff;
2616 c->Request.CDB[4]= (start_blk >> 40) & 0xff;
2617 c->Request.CDB[5]= (start_blk >> 32) & 0xff;
2618 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
2619 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
2620 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
2621 c->Request.CDB[9]= start_blk & 0xff;
2622 c->Request.CDB[10]= (creq->nr_sectors >> 24) & 0xff;
2623 c->Request.CDB[11]= (creq->nr_sectors >> 16) & 0xff;
2624 c->Request.CDB[12]= (creq->nr_sectors >> 8) & 0xff;
2625 c->Request.CDB[13]= creq->nr_sectors & 0xff;
2626 c->Request.CDB[14] = c->Request.CDB[15] = 0;
2627 }
2628 } else if (blk_pc_request(creq)) {
2629 c->Request.CDBLen = creq->cmd_len;
2630 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 2631 } else {
03bbfee5
MMOD		 2632 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
2633 BUG();
00988a35 2634 }
1da177e4
LT		 2635
2636 spin_lock_irq(q->queue_lock);
2637
7c832835 2638 addQ(&(h->reqQ), c);
1da177e4 2639 h->Qdepth++;
7c832835
BH		 2640 if (h->Qdepth > h->maxQsinceinit)
2641 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 2642
2643 goto queue;
00988a35 2644full:
1da177e4 2645 blk_stop_queue(q);
00988a35 2646startio:
1da177e4
LT		 2647 /* We will already have the driver lock here so not need
2648 * to lock it.
7c832835 2649 */
1da177e4
LT		 2650 start_io(h);
2651}
2652
3da8b713 2653static inline unsigned long get_next_completion(ctlr_info_t *h)
2654{
2655#ifdef CONFIG_CISS_SCSI_TAPE
2656 /* Any rejects from sendcmd() lying around? Process them first */
2657 if (h->scsi_rejects.ncompletions == 0)
2658 return h->access.command_completed(h);
2659 else {
2660 struct sendcmd_reject_list *srl;
2661 int n;
2662 srl = &h->scsi_rejects;
2663 n = --srl->ncompletions;
2664 /* printk("cciss%d: processing saved reject\n", h->ctlr); */
2665 printk("p");
2666 return srl->complete[n];
2667 }
2668#else
2669 return h->access.command_completed(h);
2670#endif
2671}
2672
2673static inline int interrupt_pending(ctlr_info_t *h)
2674{
2675#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 2676 return (h->access.intr_pending(h)
3da8b713 2677 || (h->scsi_rejects.ncompletions > 0));
2678#else
2679 return h->access.intr_pending(h);
2680#endif
2681}
2682
2683static inline long interrupt_not_for_us(ctlr_info_t *h)
2684{
2685#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 2686 return (((h->access.intr_pending(h) == 0) ||
2687 (h->interrupts_enabled == 0))
2688 && (h->scsi_rejects.ncompletions == 0));
3da8b713 2689#else
7c832835 2690 return (((h->access.intr_pending(h) == 0) ||
3da8b713 2691 (h->interrupts_enabled == 0)));
2692#endif
2693}
2694
7d12e780 2695static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 2696{
2697 ctlr_info_t *h = dev_id;
2698 CommandList_struct *c;
2699 unsigned long flags;
33079b21 2700 __u32 a, a1, a2;
1da177e4 2701
3da8b713 2702 if (interrupt_not_for_us(h))
1da177e4 2703 return IRQ_NONE;
1da177e4
LT		 2704 /*
2705 * If there are completed commands in the completion queue,
2706 * we had better do something about it.
2707 */
2708 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 2709 while (interrupt_pending(h)) {
7c832835 2710 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 2711 a1 = a;
33079b21
MM		 2712 if ((a & 0x04)) {
2713 a2 = (a >> 3);
f880632f 2714 if (a2 >= h->nr_cmds) {
7c832835
BH		 2715 printk(KERN_WARNING
2716 "cciss: controller cciss%d failed, stopping.\n",
2717 h->ctlr);
33079b21
MM		 2718 fail_all_cmds(h->ctlr);
2719 return IRQ_HANDLED;
2720 }
2721
2722 c = h->cmd_pool + a2;
2723 a = c->busaddr;
2724
2725 } else {
7c832835 2726 a &= ~3;
33079b21 2727 if ((c = h->cmpQ) == NULL) {
7c832835
BH		 2728 printk(KERN_WARNING
2729 "cciss: Completion of %08x ignored\n",
2730 a1);
2731 continue;
2732 }
2733 while (c->busaddr != a) {
2734 c = c->next;
2735 if (c == h->cmpQ)
2736 break;
2737 }
33079b21 2738 }
1da177e4
LT		 2739 /*
2740 * If we've found the command, take it off the
2741 * completion Q and free it
2742 */
7c832835 2743 if (c->busaddr == a) {
1da177e4
LT		 2744 removeQ(&h->cmpQ, c);
2745 if (c->cmd_type == CMD_RWREQ) {
2746 complete_command(h, c, 0);
2747 } else if (c->cmd_type == CMD_IOCTL_PEND) {
2748 complete(c->waiting);
2749 }
2750# ifdef CONFIG_CISS_SCSI_TAPE
2751 else if (c->cmd_type == CMD_SCSI)
2752 complete_scsi_command(c, 0, a1);
2753# endif
2754 continue;
2755 }
2756 }
2757 }
2758
1da177e4
LT		 2759 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2760 return IRQ_HANDLED;
2761}
7c832835
BH		 2762
2763/*
d14c4ab5 2764 * We cannot read the structure directly, for portability we must use
1da177e4 2765 * the io functions.
7c832835 2766 * This is for debug only.
1da177e4
LT		 2767 */
2768#ifdef CCISS_DEBUG
7c832835 2769static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 2770{
2771 int i;
2772 char temp_name[17];
2773
2774 printk("Controller Configuration information\n");
2775 printk("------------------------------------\n");
7c832835 2776 for (i = 0; i < 4; i++)
1da177e4 2777 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 2778 temp_name[4] = '\0';
2779 printk(" Signature = %s\n", temp_name);
1da177e4 2780 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 2781 printk(" Transport methods supported = 0x%x\n",
2782 readl(&(tb->TransportSupport)));
2783 printk(" Transport methods active = 0x%x\n",
2784 readl(&(tb->TransportActive)));
2785 printk(" Requested transport Method = 0x%x\n",
2786 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 2787 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 2788 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 2789 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 2790 readl(&(tb->HostWrite.CoalIntCount)));
2791 printk(" Max outstanding commands = 0x%d\n",
2792 readl(&(tb->CmdsOutMax)));
2793 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
2794 for (i = 0; i < 16; i++)
1da177e4
LT		 2795 temp_name[i] = readb(&(tb->ServerName[i]));
2796 temp_name[16] = '\0';
2797 printk(" Server Name = %s\n", temp_name);
7c832835 2798 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 2799}
7c832835 2800#endif /* CCISS_DEBUG */
1da177e4 2801
7c832835 2802static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 2803{
2804 int i, offset, mem_type, bar_type;
7c832835 2805 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 2806 return 0;
2807 offset = 0;
7c832835
BH		 2808 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
2809 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 2810 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
2811 offset += 4;
2812 else {
2813 mem_type = pci_resource_flags(pdev, i) &
7c832835 2814 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 2815 switch (mem_type) {
7c832835
BH		 2816 case PCI_BASE_ADDRESS_MEM_TYPE_32:
2817 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
2818 offset += 4; /* 32 bit */
2819 break;
2820 case PCI_BASE_ADDRESS_MEM_TYPE_64:
2821 offset += 8;
2822 break;
2823 default: /* reserved in PCI 2.2 */
2824 printk(KERN_WARNING
2825 "Base address is invalid\n");
2826 return -1;
1da177e4
LT		 2827 break;
2828 }
2829 }
7c832835
BH		 2830 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
2831 return i + 1;
1da177e4
LT		 2832 }
2833 return -1;
2834}
2835
fb86a35b
MM		 2836/* If MSI/MSI-X is supported by the kernel we will try to enable it on
2837 * controllers that are capable. If not, we use IO-APIC mode.
2838 */
2839
7c832835
BH		 2840static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
2841 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 2842{
2843#ifdef CONFIG_PCI_MSI
7c832835
BH		 2844 int err;
2845 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
2846 {0, 2}, {0, 3}
2847 };
fb86a35b
MM		 2848
2849 /* Some boards advertise MSI but don't really support it */
2850 if ((board_id == 0x40700E11) ||
7c832835
BH		 2851 (board_id == 0x40800E11) ||
2852 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 2853 goto default_int_mode;
2854
7c832835
BH		 2855 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
2856 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
2857 if (!err) {
2858 c->intr[0] = cciss_msix_entries[0].vector;
2859 c->intr[1] = cciss_msix_entries[1].vector;
2860 c->intr[2] = cciss_msix_entries[2].vector;
2861 c->intr[3] = cciss_msix_entries[3].vector;
2862 c->msix_vector = 1;
2863 return;
2864 }
2865 if (err > 0) {
2866 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
2867 "available\n", err);
1ecb9c0f 2868 goto default_int_mode;
7c832835
BH		 2869 } else {
2870 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
2871 err);
1ecb9c0f 2872 goto default_int_mode;
7c832835
BH		 2873 }
2874 }
2875 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
2876 if (!pci_enable_msi(pdev)) {
7c832835 2877 c->msi_vector = 1;
7c832835
BH		 2878 } else {
2879 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 2880 }
2881 }
1ecb9c0f 2882default_int_mode:
7c832835 2883#endif /* CONFIG_PCI_MSI */
fb86a35b 2884 /* if we get here we're going to use the default interrupt mode */
7c832835 2885 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 2886 return;
2887}
2888
1da177e4
LT		 2889static int cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
2890{
2891 ushort subsystem_vendor_id, subsystem_device_id, command;
2892 __u32 board_id, scratchpad = 0;
2893 __u64 cfg_offset;
2894 __u32 cfg_base_addr;
2895 __u64 cfg_base_addr_index;
c33ac89b 2896 int i, err;
1da177e4
LT		 2897
2898 /* check to see if controller has been disabled */
2899 /* BEFORE trying to enable it */
7c832835
BH		 2900 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
2901 if (!(command & 0x02)) {
2902 printk(KERN_WARNING
2903 "cciss: controller appears to be disabled\n");
c33ac89b 2904 return -ENODEV;
1da177e4
LT		 2905 }
2906
c33ac89b 2907 err = pci_enable_device(pdev);
7c832835 2908 if (err) {
1da177e4 2909 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 2910 return err;
1da177e4 2911 }
1da177e4 2912
4e570309
BH		 2913 err = pci_request_regions(pdev, "cciss");
2914 if (err) {
2915 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 2916 "aborting\n");
872225ca 2917 return err;
4e570309
BH		 2918 }
2919
1da177e4
LT		 2920 subsystem_vendor_id = pdev->subsystem_vendor;
2921 subsystem_device_id = pdev->subsystem_device;
2922 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 2923 subsystem_vendor_id);
1da177e4 2924
1da177e4
LT		 2925#ifdef CCISS_DEBUG
2926 printk("command = %x\n", command);
2927 printk("irq = %x\n", pdev->irq);
2928 printk("board_id = %x\n", board_id);
7c832835 2929#endif /* CCISS_DEBUG */
1da177e4 2930
fb86a35b
MM		 2931/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
2932 * else we use the IO-APIC interrupt assigned to us by system ROM.
2933 */
2934 cciss_interrupt_mode(c, pdev, board_id);
1da177e4
LT		 2935
2936 /*
2937 * Memory base addr is first addr , the second points to the config
7c832835 2938 * table
1da177e4
LT		 2939 */
2940
7c832835 2941 c->paddr = pci_resource_start(pdev, 0); /* addressing mode bits already removed */
1da177e4
LT		 2942#ifdef CCISS_DEBUG
2943 printk("address 0 = %x\n", c->paddr);
7c832835 2944#endif /* CCISS_DEBUG */
a5b92873 2945 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 2946
2947 /* Wait for the board to become ready. (PCI hotplug needs this.)
2948 * We poll for up to 120 secs, once per 100ms. */
7c832835 2949 for (i = 0; i < 1200; i++) {
1da177e4
LT		 2950 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
2951 if (scratchpad == CCISS_FIRMWARE_READY)
2952 break;
2953 set_current_state(TASK_INTERRUPTIBLE);
7c832835 2954 schedule_timeout(HZ / 10); /* wait 100ms */
1da177e4
LT		 2955 }
2956 if (scratchpad != CCISS_FIRMWARE_READY) {
2957 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 2958 err = -ENODEV;
4e570309 2959 goto err_out_free_res;
1da177e4
LT		 2960 }
2961
2962 /* get the address index number */
2963 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
2964 cfg_base_addr &= (__u32) 0x0000ffff;
2965#ifdef CCISS_DEBUG
2966 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 2967#endif /* CCISS_DEBUG */
2968 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4
LT		 2969#ifdef CCISS_DEBUG
2970 printk("cfg base address index = %x\n", cfg_base_addr_index);
7c832835 2971#endif /* CCISS_DEBUG */
1da177e4
LT		 2972 if (cfg_base_addr_index == -1) {
2973 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 2974 err = -ENODEV;
4e570309 2975 goto err_out_free_res;
1da177e4
LT		 2976 }
2977
2978 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
2979#ifdef CCISS_DEBUG
2980 printk("cfg offset = %x\n", cfg_offset);
7c832835
BH		 2981#endif /* CCISS_DEBUG */
2982 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
2983 cfg_base_addr_index) +
2984 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 2985 c->board_id = board_id;
2986
2987#ifdef CCISS_DEBUG
945f390f 2988 print_cfg_table(c->cfgtable);
7c832835 2989#endif /* CCISS_DEBUG */
1da177e4 2990
7c832835 2991 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 2992 if (board_id == products[i].board_id) {
2993 c->product_name = products[i].product_name;
2994 c->access = *(products[i].access);
f880632f 2995 c->nr_cmds = products[i].nr_cmds;
1da177e4
LT		 2996 break;
2997 }
2998 }
7c832835
BH		 2999 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3000 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3001 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3002 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3003 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3004 err = -ENODEV;
4e570309 3005 goto err_out_free_res;
1da177e4 3006 }
4ff9a9a4
MM		 3007 /* We didn't find the controller in our list. We know the
3008 * signature is valid. If it's an HP device let's try to
3009 * bind to the device and fire it up. Otherwise we bail.
3010 */
3011 if (i == ARRAY_SIZE(products)) {
3012 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3013 c->product_name = products[i-1].product_name;
3014 c->access = *(products[i-1].access);
f880632f 3015 c->nr_cmds = products[i-1].nr_cmds;
4ff9a9a4
MM		 3016 printk(KERN_WARNING "cciss: This is an unknown "
3017 "Smart Array controller.\n"
3018 "cciss: Please update to the latest driver "
3019 "available from www.hp.com.\n");
3020 } else {
3021 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3022 " to access the Smart Array controller %08lx\n"
3023 , (unsigned long)board_id);
3024 err = -ENODEV;
3025 goto err_out_free_res;
3026 }
3027 }
1da177e4 3028#ifdef CONFIG_X86
7c832835
BH		 3029 {
3030 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3031 __u32 prefetch;
3032 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3033 prefetch |= 0x100;
3034 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3035 }
1da177e4
LT		 3036#endif
3037
f92e2f5f
MM		 3038 /* Disabling DMA prefetch for the P600
3039 * An ASIC bug may result in a prefetch beyond
3040 * physical memory.
3041 */
3042 if(board_id == 0x3225103C) {
3043 __u32 dma_prefetch;
3044 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3045 dma_prefetch |= 0x8000;
3046 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
3047 }
3048
1da177e4
LT		 3049#ifdef CCISS_DEBUG
3050 printk("Trying to put board into Simple mode\n");
7c832835 3051#endif /* CCISS_DEBUG */
1da177e4 3052 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3053 /* Update the field, and then ring the doorbell */
3054 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3055 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3056
3057 /* under certain very rare conditions, this can take awhile.
3058 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3059 * as we enter this code.) */
7c832835 3060 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3061 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3062 break;
3063 /* delay and try again */
3064 set_current_state(TASK_INTERRUPTIBLE);
3065 schedule_timeout(10);
7c832835 3066 }
1da177e4
LT		 3067
3068#ifdef CCISS_DEBUG
7c832835
BH		 3069 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3070 readl(c->vaddr + SA5_DOORBELL));
3071#endif /* CCISS_DEBUG */
1da177e4 3072#ifdef CCISS_DEBUG
7c832835
BH		 3073 print_cfg_table(c->cfgtable);
3074#endif /* CCISS_DEBUG */
1da177e4 3075
7c832835 3076 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3077 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3078 " simple mode\n");
c33ac89b 3079 err = -ENODEV;
4e570309 3080 goto err_out_free_res;
1da177e4
LT		 3081 }
3082 return 0;
3083
5faad620 3084err_out_free_res:
872225ca
MM		 3085 /*
3086 * Deliberately omit pci_disable_device(): it does something nasty to
3087 * Smart Array controllers that pci_enable_device does not undo
3088 */
4e570309 3089 pci_release_regions(pdev);
c33ac89b 3090 return err;
1da177e4
LT		 3091}
3092
7c832835
BH		 3093/*
3094 * Gets information about the local volumes attached to the controller.
3095 */
1da177e4
LT		 3096static void cciss_getgeometry(int cntl_num)
3097{
3098 ReportLunData_struct *ld_buff;
1da177e4
LT		 3099 InquiryData_struct *inq_buff;
3100 int return_code;
3101 int i;
3102 int listlength = 0;
3103 __u32 lunid = 0;
b4482a4b 3104 unsigned block_size;
00988a35 3105 sector_t total_size;
1da177e4 3106
06ff37ff 3107 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
7c832835
BH		 3108 if (ld_buff == NULL) {
3109 printk(KERN_ERR "cciss: out of memory\n");
3110 return;
3111 }
7c832835
BH		 3112 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
3113 if (inq_buff == NULL) {
3114 printk(KERN_ERR "cciss: out of memory\n");
1da177e4 3115 kfree(ld_buff);
7c832835
BH		 3116 return;
3117 }
3118 /* Get the firmware version */
3119 return_code = sendcmd(CISS_INQUIRY, cntl_num, inq_buff,
3120 sizeof(InquiryData_struct), 0, 0, 0, NULL,
3121 TYPE_CMD);
3122 if (return_code == IO_OK) {
1da177e4
LT		 3123 hba[cntl_num]->firm_ver[0] = inq_buff->data_byte[32];
3124 hba[cntl_num]->firm_ver[1] = inq_buff->data_byte[33];
3125 hba[cntl_num]->firm_ver[2] = inq_buff->data_byte[34];
3126 hba[cntl_num]->firm_ver[3] = inq_buff->data_byte[35];
7c832835
BH		 3127 } else { /* send command failed */
3128
1da177e4 3129 printk(KERN_WARNING "cciss: unable to determine firmware"
7c832835 3130 " version of controller\n");
1da177e4 3131 }
7c832835
BH		 3132 /* Get the number of logical volumes */
3133 return_code = sendcmd(CISS_REPORT_LOG, cntl_num, ld_buff,
3134 sizeof(ReportLunData_struct), 0, 0, 0, NULL,
3135 TYPE_CMD);
1da177e4 3136
7c832835 3137 if (return_code == IO_OK) {
1da177e4
LT		 3138#ifdef CCISS_DEBUG
3139 printk("LUN Data\n--------------------------\n");
7c832835
BH		 3140#endif /* CCISS_DEBUG */
3141
3142 listlength |=
3143 (0xff & (unsigned int)(ld_buff->LUNListLength[0])) << 24;
3144 listlength |=
3145 (0xff & (unsigned int)(ld_buff->LUNListLength[1])) << 16;
3146 listlength |=
3147 (0xff & (unsigned int)(ld_buff->LUNListLength[2])) << 8;
1da177e4 3148 listlength |= 0xff & (unsigned int)(ld_buff->LUNListLength[3]);
7c832835
BH		 3149 } else { /* reading number of logical volumes failed */
3150
1da177e4 3151 printk(KERN_WARNING "cciss: report logical volume"
7c832835 3152 " command failed\n");
1da177e4
LT		 3153 listlength = 0;
3154 }
7c832835
BH		 3155 hba[cntl_num]->num_luns = listlength / 8; // 8 bytes pre entry
3156 if (hba[cntl_num]->num_luns > CISS_MAX_LUN) {
3157 printk(KERN_ERR
3158 "ciss: only %d number of logical volumes supported\n",
3159 CISS_MAX_LUN);
1da177e4
LT		 3160 hba[cntl_num]->num_luns = CISS_MAX_LUN;
3161 }
3162#ifdef CCISS_DEBUG
7c832835
BH		 3163 printk(KERN_DEBUG "Length = %x %x %x %x = %d\n",
3164 ld_buff->LUNListLength[0], ld_buff->LUNListLength[1],
3165 ld_buff->LUNListLength[2], ld_buff->LUNListLength[3],
3166 hba[cntl_num]->num_luns);
3167#endif /* CCISS_DEBUG */
3168
3169 hba[cntl_num]->highest_lun = hba[cntl_num]->num_luns - 1;
7c832835
BH		 3170 for (i = 0; i < CISS_MAX_LUN; i++) {
3171 if (i < hba[cntl_num]->num_luns) {
3172 lunid = (0xff & (unsigned int)(ld_buff->LUN[i][3]))
3173 << 24;
3174 lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][2]))
3175 << 16;
3176 lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][1]))
3177 << 8;
3178 lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);
3179
3180 hba[cntl_num]->drv[i].LunID = lunid;
1da177e4
LT		 3181
3182#ifdef CCISS_DEBUG
7c832835
BH		 3183 printk(KERN_DEBUG "LUN[%d]: %x %x %x %x = %x\n", i,
3184 ld_buff->LUN[i][0], ld_buff->LUN[i][1],
3185 ld_buff->LUN[i][2], ld_buff->LUN[i][3],
3186 hba[cntl_num]->drv[i].LunID);
3187#endif /* CCISS_DEBUG */
00988a35
MMOD		 3188
3189 /* testing to see if 16-byte CDBs are already being used */
3190 if(hba[cntl_num]->cciss_read == CCISS_READ_16) {
3191 cciss_read_capacity_16(cntl_num, i, 0,
7c832835 3192 &total_size, &block_size);
00988a35
MMOD		 3193 goto geo_inq;
3194 }
3195 cciss_read_capacity(cntl_num, i, 0, &total_size, &block_size);
3196
97c06978
MMOD		 3197 /* If read_capacity returns all F's the logical is >2TB */
3198 /* so we switch to 16-byte CDBs for all read/write ops */
3199 if(total_size == 0xFFFFFFFFULL) {
00988a35
MMOD		 3200 cciss_read_capacity_16(cntl_num, i, 0,
3201 &total_size, &block_size);
3202 hba[cntl_num]->cciss_read = CCISS_READ_16;
3203 hba[cntl_num]->cciss_write = CCISS_WRITE_16;
3204 } else {
3205 hba[cntl_num]->cciss_read = CCISS_READ_10;
3206 hba[cntl_num]->cciss_write = CCISS_WRITE_10;
3207 }
3208geo_inq:
ddd47442 3209 cciss_geometry_inquiry(cntl_num, i, 0, total_size,
7c832835
BH		 3210 block_size, inq_buff,
3211 &hba[cntl_num]->drv[i]);
ddd47442
MM		 3212 } else {
3213 /* initialize raid_level to indicate a free space */
3214 hba[cntl_num]->drv[i].raid_level = -1;
3215 }
1da177e4
LT		 3216 }
3217 kfree(ld_buff);
1da177e4 3218 kfree(inq_buff);
7c832835 3219}
1da177e4
LT		 3220
3221/* Function to find the first free pointer into our hba[] array */
3222/* Returns -1 if no free entries are left. */
3223static int alloc_cciss_hba(void)
3224{
799202cb 3225 int i;
1da177e4 3226
7c832835 3227 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3228 if (!hba[i]) {
3229 ctlr_info_t *p;
f2912a12 3230
06ff37ff 3231 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3232 if (!p)
3233 goto Enomem;
799202cb 3234 p->gendisk[0] = alloc_disk(1 << NWD_SHIFT);
f2912a12
JJ		 3235 if (!p->gendisk[0]) {
3236 kfree(p);
799202cb 3237 goto Enomem;
f2912a12 3238 }
1da177e4
LT		 3239 hba[i] = p;
3240 return i;
3241 }
3242 }
3243 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3244 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3245 return -1;
3246Enomem:
1da177e4 3247 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3248 return -1;
3249}
3250
3251static void free_hba(int i)
3252{
3253 ctlr_info_t *p = hba[i];
3254 int n;
3255
3256 hba[i] = NULL;
799202cb 3257 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3258 put_disk(p->gendisk[n]);
3259 kfree(p);
3260}
3261
3262/*
3263 * This is it. Find all the controllers and register them. I really hate
3264 * stealing all these major device numbers.
3265 * returns the number of block devices registered.
3266 */
3267static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 3268 const struct pci_device_id *ent)
1da177e4 3269{
1da177e4 3270 int i;
799202cb 3271 int j = 0;
1da177e4 3272 int rc;
40aabb58 3273 int dac;
1da177e4 3274
1da177e4 3275 i = alloc_cciss_hba();
7c832835 3276 if (i < 0)
e2019b58 3277 return -1;
1f8ef380
MM		 3278
3279 hba[i]->busy_initializing = 1;
3280
1da177e4
LT		 3281 if (cciss_pci_init(hba[i], pdev) != 0)
3282 goto clean1;
3283
3284 sprintf(hba[i]->devname, "cciss%d", i);
3285 hba[i]->ctlr = i;
3286 hba[i]->pdev = pdev;
3287
3288 /* configure PCI DMA stuff */
eb0df996 3289 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK))
40aabb58 3290 dac = 1;
eb0df996 3291 else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
40aabb58 3292 dac = 0;
1da177e4 3293 else {
40aabb58 3294 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 3295 goto clean1;
3296 }
3297
3298 /*
3299 * register with the major number, or get a dynamic major number
3300 * by passing 0 as argument. This is done for greater than
3301 * 8 controller support.
3302 */
3303 if (i < MAX_CTLR_ORIG)
564de74a 3304 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 3305 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 3306 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 3307 printk(KERN_ERR
7c832835
BH		 3308 "cciss: Unable to get major number %d for %s "
3309 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 3310 goto clean1;
7c832835 3311 } else {
1da177e4
LT		 3312 if (i >= MAX_CTLR_ORIG)
3313 hba[i]->major = rc;
3314 }
3315
3316 /* make sure the board interrupts are off */
3317 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 3318 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 3319 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 3320 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 3321 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 3322 goto clean2;
3323 }
40aabb58
BH		 3324
3325 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 3326 hba[i]->devname, pdev->device, pci_name(pdev),
3327 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3328
3329 hba[i]->cmd_pool_bits =
f880632f 3330 kmalloc(((hba[i]->nr_cmds + BITS_PER_LONG -
7c832835
BH		 3331 1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3332 hba[i]->cmd_pool = (CommandList_struct *)
3333 pci_alloc_consistent(hba[i]->pdev,
f880632f 3334 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 3335 &(hba[i]->cmd_pool_dhandle));
3336 hba[i]->errinfo_pool = (ErrorInfo_struct *)
3337 pci_alloc_consistent(hba[i]->pdev,
f880632f 3338 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 3339 &(hba[i]->errinfo_pool_dhandle));
3340 if ((hba[i]->cmd_pool_bits == NULL)
3341 || (hba[i]->cmd_pool == NULL)
3342 || (hba[i]->errinfo_pool == NULL)) {
3343 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 3344 goto clean4;
3345 }
3da8b713 3346#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 3347 hba[i]->scsi_rejects.complete =
3348 kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
f880632f 3349 (hba[i]->nr_cmds + 5), GFP_KERNEL);
3da8b713 3350 if (hba[i]->scsi_rejects.complete == NULL) {
7c832835 3351 printk(KERN_ERR "cciss: out of memory");
3da8b713 3352 goto clean4;
3353 }
3354#endif
1da177e4 3355 spin_lock_init(&hba[i]->lock);
1da177e4 3356
7c832835
BH		 3357 /* Initialize the pdev driver private data.
3358 have it point to hba[i]. */
1da177e4 3359 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 3360 /* command and error info recs zeroed out before
3361 they are used */
3362 memset(hba[i]->cmd_pool_bits, 0,
f880632f 3363 ((hba[i]->nr_cmds + BITS_PER_LONG -
7c832835 3364 1) / BITS_PER_LONG) * sizeof(unsigned long));
1da177e4 3365
7c832835
BH		 3366#ifdef CCISS_DEBUG
3367 printk(KERN_DEBUG "Scanning for drives on controller cciss%d\n", i);
3368#endif /* CCISS_DEBUG */
1da177e4
LT		 3369
3370 cciss_getgeometry(i);
3371
3372 cciss_scsi_setup(i);
3373
3374 /* Turn the interrupts on so we can service requests */
3375 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
3376
3377 cciss_procinit(i);
92c4231a
MM		 3378
3379 hba[i]->cciss_max_sectors = 2048;
3380
d6dbf42e 3381 hba[i]->busy_initializing = 0;
1da177e4 3382
799202cb 3383 do {
ad2b9312
MM		 3384 drive_info_struct *drv = &(hba[i]->drv[j]);
3385 struct gendisk *disk = hba[i]->gendisk[j];
165125e1 3386 struct request_queue *q;
799202cb
MM		 3387
3388 /* Check if the disk was allocated already */
3389 if (!disk){
3390 hba[i]->gendisk[j] = alloc_disk(1 << NWD_SHIFT);
3391 disk = hba[i]->gendisk[j];
3392 }
3393
3394 /* Check that the disk was able to be allocated */
3395 if (!disk) {
3396 printk(KERN_ERR "cciss: unable to allocate memory for disk %d\n", j);
3397 goto clean4;
3398 }
ad2b9312
MM		 3399
3400 q = blk_init_queue(do_cciss_request, &hba[i]->lock);
3401 if (!q) {
3402 printk(KERN_ERR
7c832835
BH		 3403 "cciss: unable to allocate queue for disk %d\n",
3404 j);
799202cb 3405 goto clean4;
ad2b9312
MM		 3406 }
3407 drv->queue = q;
3408
3409 q->backing_dev_info.ra_pages = READ_AHEAD;
a9925a06
JA		 3410 blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask);
3411
3412 /* This is a hardware imposed limit. */
3413 blk_queue_max_hw_segments(q, MAXSGENTRIES);
1da177e4 3414
a9925a06
JA		 3415 /* This is a limit in the driver and could be eliminated. */
3416 blk_queue_max_phys_segments(q, MAXSGENTRIES);
1da177e4 3417
92c4231a 3418 blk_queue_max_sectors(q, hba[i]->cciss_max_sectors);
1da177e4 3419
a9925a06 3420 blk_queue_softirq_done(q, cciss_softirq_done);
1da177e4 3421
ad2b9312 3422 q->queuedata = hba[i];
1da177e4 3423 sprintf(disk->disk_name, "cciss/c%dd%d", i, j);
1da177e4
LT		 3424 disk->major = hba[i]->major;
3425 disk->first_minor = j << NWD_SHIFT;
3426 disk->fops = &cciss_fops;
ad2b9312 3427 disk->queue = q;
1da177e4 3428 disk->private_data = drv;
27c0ff86 3429 disk->driverfs_dev = &pdev->dev;
1da177e4
LT		 3430 /* we must register the controller even if no disks exist */
3431 /* this is for the online array utilities */
7c832835 3432 if (!drv->heads && j)
1da177e4 3433 continue;
ad2b9312 3434 blk_queue_hardsect_size(q, drv->block_size);
1da177e4
LT		 3435 set_capacity(disk, drv->nr_blocks);
3436 add_disk(disk);
799202cb
MM		 3437 j++;
3438 } while (j <= hba[i]->highest_lun);
ad2b9312 3439
e2019b58 3440 return 1;
1da177e4 3441
7c832835 3442 clean4:
3da8b713 3443#ifdef CONFIG_CISS_SCSI_TAPE
1acc0b0b 3444 kfree(hba[i]->scsi_rejects.complete);
3da8b713 3445#endif
6044ec88 3446 kfree(hba[i]->cmd_pool_bits);
7c832835 3447 if (hba[i]->cmd_pool)
1da177e4 3448 pci_free_consistent(hba[i]->pdev,
f880632f 3449 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 3450 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3451 if (hba[i]->errinfo_pool)
1da177e4 3452 pci_free_consistent(hba[i]->pdev,
f880632f 3453 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 3454 hba[i]->errinfo_pool,
3455 hba[i]->errinfo_pool_dhandle);
fb86a35b 3456 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
7c832835 3457 clean2:
1da177e4 3458 unregister_blkdev(hba[i]->major, hba[i]->devname);
7c832835 3459 clean1:
1f8ef380 3460 hba[i]->busy_initializing = 0;
799202cb
MM		 3461 /* cleanup any queues that may have been initialized */
3462 for (j=0; j <= hba[i]->highest_lun; j++){
3463 drive_info_struct *drv = &(hba[i]->drv[j]);
3464 if (drv->queue)
3465 blk_cleanup_queue(drv->queue);
3466 }
872225ca
MM		 3467 /*
3468 * Deliberately omit pci_disable_device(): it does something nasty to
3469 * Smart Array controllers that pci_enable_device does not undo
3470 */
799202cb 3471 pci_release_regions(pdev);
799202cb 3472 pci_set_drvdata(pdev, NULL);
61808c2b 3473 free_hba(i);
e2019b58 3474 return -1;
1da177e4
LT		 3475}
3476
e9ca75b5 3477static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 3478{
3479 ctlr_info_t *tmp_ptr;
e9ca75b5 3480 int i;
1da177e4 3481 char flush_buf[4];
7c832835 3482 int return_code;
1da177e4 3483
e9ca75b5
GB		 3484 tmp_ptr = pci_get_drvdata(pdev);
3485 if (tmp_ptr == NULL)
3486 return;
3487 i = tmp_ptr->ctlr;
3488 if (hba[i] == NULL)
3489 return;
3490
3491 /* Turn board interrupts off and send the flush cache command */
3492 /* sendcmd will turn off interrupt, and send the flush...
3493 * To write all data in the battery backed cache to disks */
3494 memset(flush_buf, 0, 4);
3495 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
3496 TYPE_CMD);
3497 if (return_code == IO_OK) {
3498 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
3499 } else {
3500 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
3501 }
3502 free_irq(hba[i]->intr[2], hba[i]);
3503}
3504
3505static void __devexit cciss_remove_one(struct pci_dev *pdev)
3506{
3507 ctlr_info_t *tmp_ptr;
3508 int i, j;
3509
7c832835
BH		 3510 if (pci_get_drvdata(pdev) == NULL) {
3511 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 3512 return;
3513 }
3514 tmp_ptr = pci_get_drvdata(pdev);
3515 i = tmp_ptr->ctlr;
7c832835 3516 if (hba[i] == NULL) {
1da177e4 3517 printk(KERN_ERR "cciss: device appears to "
7c832835 3518 "already be removed \n");
1da177e4
LT		 3519 return;
3520 }
b6550777
BH		 3521
3522 remove_proc_entry(hba[i]->devname, proc_cciss);
3523 unregister_blkdev(hba[i]->major, hba[i]->devname);
3524
3525 /* remove it from the disk list */
3526 for (j = 0; j < CISS_MAX_LUN; j++) {
3527 struct gendisk *disk = hba[i]->gendisk[j];
3528 if (disk) {
165125e1 3529 struct request_queue *q = disk->queue;
b6550777
BH		 3530
3531 if (disk->flags & GENHD_FL_UP)
3532 del_gendisk(disk);
3533 if (q)
3534 blk_cleanup_queue(q);
3535 }
3536 }
3537
3538 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
3539
e9ca75b5 3540 cciss_shutdown(pdev);
fb86a35b
MM		 3541
3542#ifdef CONFIG_PCI_MSI
7c832835
BH		 3543 if (hba[i]->msix_vector)
3544 pci_disable_msix(hba[i]->pdev);
3545 else if (hba[i]->msi_vector)
3546 pci_disable_msi(hba[i]->pdev);
3547#endif /* CONFIG_PCI_MSI */
fb86a35b 3548
1da177e4 3549 iounmap(hba[i]->vaddr);
1da177e4 3550
f880632f 3551 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 3552 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 3553 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 3554 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 3555 kfree(hba[i]->cmd_pool_bits);
3da8b713 3556#ifdef CONFIG_CISS_SCSI_TAPE
3557 kfree(hba[i]->scsi_rejects.complete);
3558#endif
872225ca
MM		 3559 /*
3560 * Deliberately omit pci_disable_device(): it does something nasty to
3561 * Smart Array controllers that pci_enable_device does not undo
3562 */
7c832835 3563 pci_release_regions(pdev);
4e570309 3564 pci_set_drvdata(pdev, NULL);
1da177e4 3565 free_hba(i);
7c832835 3566}
1da177e4
LT		 3567
3568static struct pci_driver cciss_pci_driver = {
7c832835
BH		 3569 .name = "cciss",
3570 .probe = cciss_init_one,
3571 .remove = __devexit_p(cciss_remove_one),
3572 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 3573 .shutdown = cciss_shutdown,
1da177e4
LT		 3574};
3575
3576/*
3577 * This is it. Register the PCI driver information for the cards we control
7c832835 3578 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 3579 */
3580static int __init cciss_init(void)
3581{
3582 printk(KERN_INFO DRIVER_NAME "\n");
3583
3584 /* Register for our PCI devices */
9bfab8ce 3585 return pci_register_driver(&cciss_pci_driver);
1da177e4
LT		 3586}
3587
3588static void __exit cciss_cleanup(void)
3589{
3590 int i;
3591
3592 pci_unregister_driver(&cciss_pci_driver);
3593 /* double check that all controller entrys have been removed */
7c832835
BH		 3594 for (i = 0; i < MAX_CTLR; i++) {
3595 if (hba[i] != NULL) {
1da177e4 3596 printk(KERN_WARNING "cciss: had to remove"
7c832835 3597 " controller %d\n", i);
1da177e4
LT		 3598 cciss_remove_one(hba[i]->pdev);
3599 }
3600 }
3601 remove_proc_entry("cciss", proc_root_driver);
3602}
3603
33079b21
MM		 3604static void fail_all_cmds(unsigned long ctlr)
3605{
3606 /* If we get here, the board is apparently dead. */
3607 ctlr_info_t *h = hba[ctlr];
3608 CommandList_struct *c;
3609 unsigned long flags;
3610
3611 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 3612 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 3613
3614 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
3615
7c832835 3616 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 3617
3618 /* move everything off the request queue onto the completed queue */
7c832835 3619 while ((c = h->reqQ) != NULL) {
33079b21
MM		 3620 removeQ(&(h->reqQ), c);
3621 h->Qdepth--;
7c832835 3622 addQ(&(h->cmpQ), c);
33079b21
MM		 3623 }
3624
3625 /* Now, fail everything on the completed queue with a HW error */
7c832835 3626 while ((c = h->cmpQ) != NULL) {
33079b21
MM		 3627 removeQ(&h->cmpQ, c);
3628 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
3629 if (c->cmd_type == CMD_RWREQ) {
3630 complete_command(h, c, 0);
3631 } else if (c->cmd_type == CMD_IOCTL_PEND)
3632 complete(c->waiting);
3633#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 3634 else if (c->cmd_type == CMD_SCSI)
3635 complete_scsi_command(c, 0, 0);
33079b21
MM		 3636#endif
3637 }
3638 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
3639 return;
3640}
3641
1da177e4
LT		 3642module_init(cciss_init);
3643module_exit(cciss_cleanup);
Linux kernel - Deliverables
This page took 0.50088 seconds and 5 git commands to generate.