nbd.c: sock_xmit: cleanup signal related code
[linux-2.6.git] / drivers / block / cciss.c
1 /*
2  *    Disk Array driver for HP SA 5xxx and 6xxx Controllers
3  *    Copyright 2000, 2006 Hewlett-Packard Development Company, L.P.
4  *
5  *    This program is free software; you can redistribute it and/or modify
6  *    it under the terms of the GNU General Public License as published by
7  *    the Free Software Foundation; 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
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>
36 #include <linux/init.h>
37 #include <linux/hdreg.h>
38 #include <linux/spinlock.h>
39 #include <linux/compat.h>
40 #include <linux/blktrace_api.h>
41 #include <asm/uaccess.h>
42 #include <asm/io.h>
43
44 #include <linux/dma-mapping.h>
45 #include <linux/blkdev.h>
46 #include <linux/genhd.h>
47 #include <linux/completion.h>
48 #include <scsi/scsi.h>
49 #include <scsi/sg.h>
50 #include <scsi/scsi_ioctl.h>
51 #include <linux/cdrom.h>
52
53 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
54 #define DRIVER_NAME "HP CISS Driver (v 3.6.14)"
55 #define DRIVER_VERSION CCISS_DRIVER_VERSION(3,6,14)
56
57 /* Embedded module documentation macros - see modules.h */
58 MODULE_AUTHOR("Hewlett-Packard Company");
59 MODULE_DESCRIPTION("Driver for HP Controller SA5xxx SA6xxx version 3.6.14");
60 MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
61                         " SA6i P600 P800 P400 P400i E200 E200i E500");
62 MODULE_VERSION("3.6.14");
63 MODULE_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 */
70 static const struct pci_device_id cciss_pci_device_id[] = {
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},
89         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3237},
90         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x323D},
91         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
92                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
93         {0,}
94 };
95
96 MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
97
98 /*  board_id = Subsystem Device ID & Vendor ID
99  *  product = Marketing Name for the board
100  *  access = Address of the struct of function pointers
101  *  nr_cmds = Number of commands supported by controller
102  */
103 static struct board_type products[] = {
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},
122         {0x3237103C, "Smart Array E500", &SA5_access, 512},
123         {0x323D103C, "Smart Array P700m", &SA5_access, 512},
124         {0xFFFF103C, "Unknown Smart Array", &SA5_access, 120},
125 };
126
127 /* How long to wait (in milliseconds) for board to go into simple mode */
128 #define MAX_CONFIG_WAIT 30000
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
135 #define MAX_CTLR        32
136
137 /* Originally cciss driver only supports 8 major numbers */
138 #define MAX_CTLR_ORIG   8
139
140 static ctlr_info_t *hba[MAX_CTLR];
141
142 static void do_cciss_request(request_queue_t *q);
143 static irqreturn_t do_cciss_intr(int irq, void *dev_id);
144 static int cciss_open(struct inode *inode, struct file *filep);
145 static int cciss_release(struct inode *inode, struct file *filep);
146 static int cciss_ioctl(struct inode *inode, struct file *filep,
147                        unsigned int cmd, unsigned long arg);
148 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
149
150 static int cciss_revalidate(struct gendisk *disk);
151 static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk);
152 static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
153                            int clear_all);
154
155 static void cciss_read_capacity(int ctlr, int logvol, int withirq,
156                         sector_t *total_size, unsigned int *block_size);
157 static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
158                         sector_t *total_size, unsigned int *block_size);
159 static void cciss_geometry_inquiry(int ctlr, int logvol,
160                         int withirq, sector_t total_size,
161                         unsigned int block_size, InquiryData_struct *inq_buff,
162                                    drive_info_struct *drv);
163 static void cciss_getgeometry(int cntl_num);
164 static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
165                                            __u32);
166 static void start_io(ctlr_info_t *h);
167 static 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);
170 static 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);
173
174 static void fail_all_cmds(unsigned long ctlr);
175
176 #ifdef CONFIG_PROC_FS
177 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
178                                int length, int *eof, void *data);
179 static void cciss_procinit(int i);
180 #else
181 static void cciss_procinit(int i)
182 {
183 }
184 #endif                          /* CONFIG_PROC_FS */
185
186 #ifdef CONFIG_COMPAT
187 static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
188 #endif
189
190 static 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,
196 #ifdef CONFIG_COMPAT
197         .compat_ioctl = cciss_compat_ioctl,
198 #endif
199         .revalidate_disk = cciss_revalidate,
200 };
201
202 /*
203  * Enqueuing and dequeuing functions for cmdlists.
204  */
205 static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c)
206 {
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         }
216 }
217
218 static inline CommandList_struct *removeQ(CommandList_struct **Qptr,
219                                           CommandList_struct *c)
220 {
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;
230 }
231
232 #include "cciss_scsi.c"         /* For SCSI tape support */
233
234 #define RAID_UNKNOWN 6
235
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)
243 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
244         "UNKNOWN"
245 };
246
247 static struct proc_dir_entry *proc_cciss;
248
249 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
250                                int length, int *eof, void *data)
251 {
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;
257         unsigned long flags;
258         sector_t vol_sz, vol_sz_frac;
259
260         ctlr = h->ctlr;
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);
268                 return -EBUSY;
269         }
270         h->busy_configuring = 1;
271         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
272
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"
278                        "Max sectors: %d\n"
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],
289                        h->num_luns,
290                        h->cciss_max_sectors,
291                        h->Qdepth, h->commands_outstanding,
292                        h->maxQsinceinit, h->max_outstanding, h->maxSG);
293
294         pos += size;
295         len += size;
296         cciss_proc_tape_report(ctlr, buffer, &pos, &len);
297         for (i = 0; i <= h->highest_lun; i++) {
298
299                 drv = &h->drv[i];
300                 if (drv->heads == 0)
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;
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;
323         h->busy_configuring = 0;
324         return len;
325 }
326
327 static int
328 cciss_proc_write(struct file *file, const char __user *buffer,
329                  unsigned long count, void *data)
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
338         if (count > sizeof(cmd) - 1)
339                 return -EINVAL;
340         if (copy_from_user(cmd, buffer, count))
341                 return -EFAULT;
342         cmd[count] = '\0';
343         len = strlen(cmd);      // above 3 lines ensure safety
344         if (len && cmd[len - 1] == '\n')
345                 cmd[--len] = '\0';
346 #       ifdef CONFIG_CISS_SCSI_TAPE
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.) */
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  */
363 static void __devinit cciss_procinit(int i)
364 {
365         struct proc_dir_entry *pde;
366
367         if (proc_cciss == NULL) {
368                 proc_cciss = proc_mkdir("cciss", proc_root_driver);
369                 if (!proc_cciss)
370                         return;
371         }
372
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]);
376         pde->write_proc = cciss_proc_write;
377 }
378 #endif                          /* CONFIG_PROC_FS */
379
380 /*
381  * For operations that cannot sleep, a command block is allocated at init,
382  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
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  */
387 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
388 {
389         CommandList_struct *c;
390         int i;
391         u64bit temp64;
392         dma_addr_t cmd_dma_handle, err_dma_handle;
393
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;
399                 memset(c, 0, sizeof(CommandList_struct));
400
401                 c->cmdindex = -1;
402
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,
409                                 sizeof(CommandList_struct), c, cmd_dma_handle);
410                         return NULL;
411                 }
412                 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
413         } else {                /* get it out of the controllers pool */
414
415                 do {
416                         i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
417                         if (i == h->nr_cmds)
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);
422 #ifdef CCISS_DEBUG
423                 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
424 #endif
425                 c = h->cmd_pool + i;
426                 memset(c, 0, sizeof(CommandList_struct));
427                 cmd_dma_handle = h->cmd_pool_dhandle
428                     + i * sizeof(CommandList_struct);
429                 c->err_info = h->errinfo_pool + i;
430                 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
431                 err_dma_handle = h->errinfo_pool_dhandle
432                     + i * sizeof(ErrorInfo_struct);
433                 h->nr_allocs++;
434
435                 c->cmdindex = i;
436         }
437
438         c->busaddr = (__u32) cmd_dma_handle;
439         temp64.val = (__u64) err_dma_handle;
440         c->ErrDesc.Addr.lower = temp64.val32.lower;
441         c->ErrDesc.Addr.upper = temp64.val32.upper;
442         c->ErrDesc.Len = sizeof(ErrorInfo_struct);
443
444         c->ctlr = h->ctlr;
445         return c;
446 }
447
448 /*
449  * Frees a command block that was previously allocated with cmd_alloc().
450  */
451 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
452 {
453         int i;
454         u64bit temp64;
455
456         if (!got_from_pool) {
457                 temp64.val32.lower = c->ErrDesc.Addr.lower;
458                 temp64.val32.upper = c->ErrDesc.Addr.upper;
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 {
464                 i = c - h->cmd_pool;
465                 clear_bit(i & (BITS_PER_LONG - 1),
466                           h->cmd_pool_bits + (i / BITS_PER_LONG));
467                 h->nr_frees++;
468         }
469 }
470
471 static inline ctlr_info_t *get_host(struct gendisk *disk)
472 {
473         return disk->queue->queuedata;
474 }
475
476 static 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  */
484 static 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);
491 #endif                          /* CCISS_DEBUG */
492
493         if (host->busy_initializing || drv->busy_configuring)
494                 return -EBUSY;
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          */
503         if (drv->heads == 0) {
504                 if (iminor(inode) != 0) {       /* not node 0? */
505                         /* if not node 0 make sure it is a partition = 0 */
506                         if (iminor(inode) & 0x0f) {
507                                 return -ENXIO;
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 }
520
521 /*
522  * Close.  Sync first.
523  */
524 static 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
530         printk(KERN_DEBUG "cciss_release %s\n",
531                inode->i_bdev->bd_disk->disk_name);
532 #endif                          /* CCISS_DEBUG */
533
534         drv->usage_count--;
535         host->usage_count--;
536         return 0;
537 }
538
539 #ifdef CONFIG_COMPAT
540
541 static int do_ioctl(struct file *f, unsigned cmd, unsigned long arg)
542 {
543         int ret;
544         lock_kernel();
545         ret = cciss_ioctl(f->f_path.dentry->d_inode, f, cmd, arg);
546         unlock_kernel();
547         return ret;
548 }
549
550 static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
551                                   unsigned long arg);
552 static int cciss_ioctl32_big_passthru(struct file *f, unsigned cmd,
553                                       unsigned long arg);
554
555 static 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
585 static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
586                                   unsigned long arg)
587 {
588         IOCTL32_Command_struct __user *arg32 =
589             (IOCTL32_Command_struct __user *) arg;
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;
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));
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
613         err = do_ioctl(f, CCISS_PASSTHRU, (unsigned long)p);
614         if (err)
615                 return err;
616         err |=
617             copy_in_user(&arg32->error_info, &p->error_info,
618                          sizeof(arg32->error_info));
619         if (err)
620                 return -EFAULT;
621         return err;
622 }
623
624 static int cciss_ioctl32_big_passthru(struct file *file, unsigned cmd,
625                                       unsigned long arg)
626 {
627         BIG_IOCTL32_Command_struct __user *arg32 =
628             (BIG_IOCTL32_Command_struct __user *) arg;
629         BIG_IOCTL_Command_struct arg64;
630         BIG_IOCTL_Command_struct __user *p =
631             compat_alloc_user_space(sizeof(arg64));
632         int err;
633         u32 cp;
634
635         err = 0;
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));
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)
652                 return -EFAULT;
653
654         err = do_ioctl(file, CCISS_BIG_PASSTHRU, (unsigned long)p);
655         if (err)
656                 return err;
657         err |=
658             copy_in_user(&arg32->error_info, &p->error_info,
659                          sizeof(arg32->error_info));
660         if (err)
661                 return -EFAULT;
662         return err;
663 }
664 #endif
665
666 static 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
679 /*
680  * ioctl
681  */
682 static int cciss_ioctl(struct inode *inode, struct file *filep,
683                        unsigned int cmd, unsigned long arg)
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);
694 #endif                          /* CCISS_DEBUG */
695
696         switch (cmd) {
697         case CCISS_GETPCIINFO:
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                 }
712         case CCISS_GETINTINFO:
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                 }
726         case CCISS_SETINTINFO:
727                 {
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;
763                 }
764         case CCISS_GETNODENAME:
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                 }
778         case CCISS_SETNODENAME:
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                 }
814
815         case CCISS_GETHEARTBEAT:
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                 }
827         case CCISS_GETBUSTYPES:
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                 }
839         case CCISS_GETFIRMVER:
840                 {
841                         FirmwareVer_type firmware;
842
843                         if (!arg)
844                                 return -EINVAL;
845                         memcpy(firmware, host->firm_ver, 4);
846
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;
855
856                         if (!arg)
857                                 return -EINVAL;
858
859                         if (copy_to_user
860                             (argp, &DriverVer, sizeof(DriverVer_type)))
861                                 return -EFAULT;
862                         return 0;
863                 }
864
865         case CCISS_REVALIDVOLS:
866                 return rebuild_lun_table(host, NULL);
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                 }
879         case CCISS_DEREGDISK:
880                 return rebuild_lun_table(host, disk);
881
882         case CCISS_REGNEWD:
883                 return rebuild_lun_table(host, NULL);
884
885         case CCISS_PASSTHRU:
886                 {
887                         IOCTL_Command_struct iocommand;
888                         CommandList_struct *c;
889                         char *buff = NULL;
890                         u64bit temp64;
891                         unsigned long flags;
892                         DECLARE_COMPLETION_ONSTACK(wait);
893
894                         if (!arg)
895                                 return -EINVAL;
896
897                         if (!capable(CAP_SYS_RAWIO))
898                                 return -EPERM;
899
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
946
947                         // Fill in Request block
948                         c->Request = iocommand.Request;
949
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);
983                                 cmd_free(host, c, 0);
984                                 return -EFAULT;
985                         }
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;
999                 }
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;
1010                         DECLARE_COMPLETION_ONSTACK(wait);
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)) {
1031                                 status = -EINVAL;
1032                                 goto cleanup1;
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) {
1046                                 status = -ENOMEM;
1047                                 goto cleanup1;
1048                         }
1049                         buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
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) {
1064                                         status = -ENOMEM;
1065                                         goto cleanup1;
1066                                 }
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;
1090                         } else {
1091                                 c->Header.SGList = 0;
1092                                 c->Header.SGTotal = 0;
1093                         }
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],
1127                                         PCI_DMA_BIDIRECTIONAL);
1128                         }
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];
1147                                 }
1148                         }
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;
1160                 }
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:
1173                 return scsi_cmd_ioctl(filep, disk, cmd, argp);
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:
1185         default:
1186                 return -ENOTTY;
1187         }
1188 }
1189
1190 static inline void complete_buffers(struct bio *bio, int status)
1191 {
1192         while (bio) {
1193                 struct bio *xbh = bio->bi_next;
1194                 int nr_sectors = bio_sectors(bio);
1195
1196                 bio->bi_next = NULL;
1197                 bio_endio(bio, nr_sectors << 9, status ? 0 : -EIO);
1198                 bio = xbh;
1199         }
1200 }
1201
1202 static void cciss_check_queues(ctlr_info_t *h)
1203 {
1204         int start_queue = h->next_to_run;
1205         int i;
1206
1207         /* check to see if we have maxed out the number of commands that can
1208          * be placed on the queue.  If so then exit.  We do this check here
1209          * in case the interrupt we serviced was from an ioctl and did not
1210          * free any new commands.
1211          */
1212         if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
1213                 return;
1214
1215         /* We have room on the queue for more commands.  Now we need to queue
1216          * them up.  We will also keep track of the next queue to run so
1217          * that every queue gets a chance to be started first.
1218          */
1219         for (i = 0; i < h->highest_lun + 1; i++) {
1220                 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1221                 /* make sure the disk has been added and the drive is real
1222                  * because this can be called from the middle of init_one.
1223                  */
1224                 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1225                         continue;
1226                 blk_start_queue(h->gendisk[curr_queue]->queue);
1227
1228                 /* check to see if we have maxed out the number of commands
1229                  * that can be placed on the queue.
1230                  */
1231                 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
1232                         if (curr_queue == start_queue) {
1233                                 h->next_to_run =
1234                                     (start_queue + 1) % (h->highest_lun + 1);
1235                                 break;
1236                         } else {
1237                                 h->next_to_run = curr_queue;
1238                                 break;
1239                         }
1240                 } else {
1241                         curr_queue = (curr_queue + 1) % (h->highest_lun + 1);
1242                 }
1243         }
1244 }
1245
1246 static void cciss_softirq_done(struct request *rq)
1247 {
1248         CommandList_struct *cmd = rq->completion_data;
1249         ctlr_info_t *h = hba[cmd->ctlr];
1250         unsigned long flags;
1251         u64bit temp64;
1252         int i, ddir;
1253
1254         if (cmd->Request.Type.Direction == XFER_READ)
1255                 ddir = PCI_DMA_FROMDEVICE;
1256         else
1257                 ddir = PCI_DMA_TODEVICE;
1258
1259         /* command did not need to be retried */
1260         /* unmap the DMA mapping for all the scatter gather elements */
1261         for (i = 0; i < cmd->Header.SGList; i++) {
1262                 temp64.val32.lower = cmd->SG[i].Addr.lower;
1263                 temp64.val32.upper = cmd->SG[i].Addr.upper;
1264                 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1265         }
1266
1267         complete_buffers(rq->bio, (rq->errors == 0));
1268
1269         if (blk_fs_request(rq)) {
1270                 const int rw = rq_data_dir(rq);
1271
1272                 disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
1273         }
1274
1275 #ifdef CCISS_DEBUG
1276         printk("Done with %p\n", rq);
1277 #endif                          /* CCISS_DEBUG */
1278
1279         add_disk_randomness(rq->rq_disk);
1280         spin_lock_irqsave(&h->lock, flags);
1281         end_that_request_last(rq, (rq->errors == 0));
1282         cmd_free(h, cmd, 1);
1283         cciss_check_queues(h);
1284         spin_unlock_irqrestore(&h->lock, flags);
1285 }
1286
1287 /* This function will check the usage_count of the drive to be updated/added.
1288  * If the usage_count is zero then the drive information will be updated and
1289  * the disk will be re-registered with the kernel.  If not then it will be
1290  * left alone for the next reboot.  The exception to this is disk 0 which
1291  * will always be left registered with the kernel since it is also the
1292  * controller node.  Any changes to disk 0 will show up on the next
1293  * reboot.
1294  */
1295 static void cciss_update_drive_info(int ctlr, int drv_index)
1296 {
1297         ctlr_info_t *h = hba[ctlr];
1298         struct gendisk *disk;
1299         InquiryData_struct *inq_buff = NULL;
1300         unsigned int block_size;
1301         sector_t total_size;
1302         unsigned long flags = 0;
1303         int ret = 0;
1304
1305         /* if the disk already exists then deregister it before proceeding */
1306         if (h->drv[drv_index].raid_level != -1) {
1307                 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1308                 h->drv[drv_index].busy_configuring = 1;
1309                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1310                 ret = deregister_disk(h->gendisk[drv_index],
1311                                       &h->drv[drv_index], 0);
1312                 h->drv[drv_index].busy_configuring = 0;
1313         }
1314
1315         /* If the disk is in use return */
1316         if (ret)
1317                 return;
1318
1319         /* Get information about the disk and modify the driver structure */
1320         inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1321         if (inq_buff == NULL)
1322                 goto mem_msg;
1323
1324         /* testing to see if 16-byte CDBs are already being used */
1325         if (h->cciss_read == CCISS_READ_16) {
1326                 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1327                         &total_size, &block_size);
1328                 goto geo_inq;
1329         }
1330
1331         cciss_read_capacity(ctlr, drv_index, 1,
1332                             &total_size, &block_size);
1333
1334         /* if read_capacity returns all F's this volume is >2TB in size */
1335         /* so we switch to 16-byte CDB's for all read/write ops */
1336         if (total_size == 0xFFFFFFFFULL) {
1337                 cciss_read_capacity_16(ctlr, drv_index, 1,
1338                 &total_size, &block_size);
1339                 h->cciss_read = CCISS_READ_16;
1340                 h->cciss_write = CCISS_WRITE_16;
1341         } else {
1342                 h->cciss_read = CCISS_READ_10;
1343                 h->cciss_write = CCISS_WRITE_10;
1344         }
1345 geo_inq:
1346         cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1347                                inq_buff, &h->drv[drv_index]);
1348
1349         ++h->num_luns;
1350         disk = h->gendisk[drv_index];
1351         set_capacity(disk, h->drv[drv_index].nr_blocks);
1352
1353         /* if it's the controller it's already added */
1354         if (drv_index) {
1355                 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1356                 sprintf(disk->disk_name, "cciss/c%dd%d", ctlr, drv_index);
1357                 disk->major = h->major;
1358                 disk->first_minor = drv_index << NWD_SHIFT;
1359                 disk->fops = &cciss_fops;
1360                 disk->private_data = &h->drv[drv_index];
1361
1362                 /* Set up queue information */
1363                 disk->queue->backing_dev_info.ra_pages = READ_AHEAD;
1364                 blk_queue_bounce_limit(disk->queue, hba[ctlr]->pdev->dma_mask);
1365
1366                 /* This is a hardware imposed limit. */
1367                 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1368
1369                 /* This is a limit in the driver and could be eliminated. */
1370                 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1371
1372                 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1373
1374                 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1375
1376                 disk->queue->queuedata = hba[ctlr];
1377
1378                 blk_queue_hardsect_size(disk->queue,
1379                                         hba[ctlr]->drv[drv_index].block_size);
1380
1381                 h->drv[drv_index].queue = disk->queue;
1382                 add_disk(disk);
1383         }
1384
1385       freeret:
1386         kfree(inq_buff);
1387         return;
1388       mem_msg:
1389         printk(KERN_ERR "cciss: out of memory\n");
1390         goto freeret;
1391 }
1392
1393 /* This function will find the first index of the controllers drive array
1394  * that has a -1 for the raid_level and will return that index.  This is
1395  * where new drives will be added.  If the index to be returned is greater
1396  * than the highest_lun index for the controller then highest_lun is set
1397  * to this new index.  If there are no available indexes then -1 is returned.
1398  */
1399 static int cciss_find_free_drive_index(int ctlr)
1400 {
1401         int i;
1402
1403         for (i = 0; i < CISS_MAX_LUN; i++) {
1404                 if (hba[ctlr]->drv[i].raid_level == -1) {
1405                         if (i > hba[ctlr]->highest_lun)
1406                                 hba[ctlr]->highest_lun = i;
1407                         return i;
1408                 }
1409         }
1410         return -1;
1411 }
1412
1413 /* This function will add and remove logical drives from the Logical
1414  * drive array of the controller and maintain persistency of ordering
1415  * so that mount points are preserved until the next reboot.  This allows
1416  * for the removal of logical drives in the middle of the drive array
1417  * without a re-ordering of those drives.
1418  * INPUT
1419  * h            = The controller to perform the operations on
1420  * del_disk     = The disk to remove if specified.  If the value given
1421  *                is NULL then no disk is removed.
1422  */
1423 static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk)
1424 {
1425         int ctlr = h->ctlr;
1426         int num_luns;
1427         ReportLunData_struct *ld_buff = NULL;
1428         drive_info_struct *drv = NULL;
1429         int return_code;
1430         int listlength = 0;
1431         int i;
1432         int drv_found;
1433         int drv_index = 0;
1434         __u32 lunid = 0;
1435         unsigned long flags;
1436
1437         /* Set busy_configuring flag for this operation */
1438         spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1439         if (h->busy_configuring) {
1440                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1441                 return -EBUSY;
1442         }
1443         h->busy_configuring = 1;
1444
1445         /* if del_disk is NULL then we are being called to add a new disk
1446          * and update the logical drive table.  If it is not NULL then
1447          * we will check if the disk is in use or not.
1448          */
1449         if (del_disk != NULL) {
1450                 drv = get_drv(del_disk);
1451                 drv->busy_configuring = 1;
1452                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1453                 return_code = deregister_disk(del_disk, drv, 1);
1454                 drv->busy_configuring = 0;
1455                 h->busy_configuring = 0;
1456                 return return_code;
1457         } else {
1458                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1459                 if (!capable(CAP_SYS_RAWIO))
1460                         return -EPERM;
1461
1462                 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1463                 if (ld_buff == NULL)
1464                         goto mem_msg;
1465
1466                 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
1467                                               sizeof(ReportLunData_struct), 0,
1468                                               0, 0, TYPE_CMD);
1469
1470                 if (return_code == IO_OK) {
1471                         listlength =
1472                                 be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
1473                 } else {        /* reading number of logical volumes failed */
1474                         printk(KERN_WARNING "cciss: report logical volume"
1475                                " command failed\n");
1476                         listlength = 0;
1477                         goto freeret;
1478                 }
1479
1480                 num_luns = listlength / 8;      /* 8 bytes per entry */
1481                 if (num_luns > CISS_MAX_LUN) {
1482                         num_luns = CISS_MAX_LUN;
1483                         printk(KERN_WARNING "cciss: more luns configured"
1484                                " on controller than can be handled by"
1485                                " this driver.\n");
1486                 }
1487
1488                 /* Compare controller drive array to drivers drive array.
1489                  * Check for updates in the drive information and any new drives
1490                  * on the controller.
1491                  */
1492                 for (i = 0; i < num_luns; i++) {
1493                         int j;
1494
1495                         drv_found = 0;
1496
1497                         lunid = (0xff &
1498                                  (unsigned int)(ld_buff->LUN[i][3])) << 24;
1499                         lunid |= (0xff &
1500                                   (unsigned int)(ld_buff->LUN[i][2])) << 16;
1501                         lunid |= (0xff &
1502                                   (unsigned int)(ld_buff->LUN[i][1])) << 8;
1503                         lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);
1504
1505                         /* Find if the LUN is already in the drive array
1506                          * of the controller.  If so then update its info
1507                          * if not is use.  If it does not exist then find
1508                          * the first free index and add it.
1509                          */
1510                         for (j = 0; j <= h->highest_lun; j++) {
1511                                 if (h->drv[j].LunID == lunid) {
1512                                         drv_index = j;
1513                                         drv_found = 1;
1514                                 }
1515                         }
1516
1517                         /* check if the drive was found already in the array */
1518                         if (!drv_found) {
1519                                 drv_index = cciss_find_free_drive_index(ctlr);
1520                                 if (drv_index == -1)
1521                                         goto freeret;
1522
1523                                 /*Check if the gendisk needs to be allocated */
1524                                 if (!h->gendisk[drv_index]){
1525                                         h->gendisk[drv_index] = alloc_disk(1 << NWD_SHIFT);
1526                                         if (!h->gendisk[drv_index]){
1527                                                 printk(KERN_ERR "cciss: could not allocate new disk %d\n", drv_index);
1528                                                 goto mem_msg;
1529                                         }
1530                                 }
1531                         }
1532                         h->drv[drv_index].LunID = lunid;
1533                         cciss_update_drive_info(ctlr, drv_index);
1534                 }               /* end for */
1535         }                       /* end else */
1536
1537       freeret:
1538         kfree(ld_buff);
1539         h->busy_configuring = 0;
1540         /* We return -1 here to tell the ACU that we have registered/updated
1541          * all of the drives that we can and to keep it from calling us
1542          * additional times.
1543          */
1544         return -1;
1545       mem_msg:
1546         printk(KERN_ERR "cciss: out of memory\n");
1547         goto freeret;
1548 }
1549
1550 /* This function will deregister the disk and it's queue from the
1551  * kernel.  It must be called with the controller lock held and the
1552  * drv structures busy_configuring flag set.  It's parameters are:
1553  *
1554  * disk = This is the disk to be deregistered
1555  * drv  = This is the drive_info_struct associated with the disk to be
1556  *        deregistered.  It contains information about the disk used
1557  *        by the driver.
1558  * clear_all = This flag determines whether or not the disk information
1559  *             is going to be completely cleared out and the highest_lun
1560  *             reset.  Sometimes we want to clear out information about
1561  *             the disk in preparation for re-adding it.  In this case
1562  *             the highest_lun should be left unchanged and the LunID
1563  *             should not be cleared.
1564 */
1565 static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
1566                            int clear_all)
1567 {
1568         int i;
1569         ctlr_info_t *h = get_host(disk);
1570
1571         if (!capable(CAP_SYS_RAWIO))
1572                 return -EPERM;
1573
1574         /* make sure logical volume is NOT is use */
1575         if (clear_all || (h->gendisk[0] == disk)) {
1576                 if (drv->usage_count > 1)
1577                         return -EBUSY;
1578         } else if (drv->usage_count > 0)
1579                 return -EBUSY;
1580
1581         /* invalidate the devices and deregister the disk.  If it is disk
1582          * zero do not deregister it but just zero out it's values.  This
1583          * allows us to delete disk zero but keep the controller registered.
1584          */
1585         if (h->gendisk[0] != disk) {
1586                 if (disk) {
1587                         request_queue_t *q = disk->queue;
1588                         if (disk->flags & GENHD_FL_UP)
1589                                 del_gendisk(disk);
1590                         if (q) {
1591                                 blk_cleanup_queue(q);
1592                                 /* Set drv->queue to NULL so that we do not try
1593                                  * to call blk_start_queue on this queue in the
1594                                  * interrupt handler
1595                                  */
1596                                 drv->queue = NULL;
1597                         }
1598                         /* If clear_all is set then we are deleting the logical
1599                          * drive, not just refreshing its info.  For drives
1600                          * other than disk 0 we will call put_disk.  We do not
1601                          * do this for disk 0 as we need it to be able to
1602                          * configure the controller.
1603                         */
1604                         if (clear_all){
1605                                 /* This isn't pretty, but we need to find the
1606                                  * disk in our array and NULL our the pointer.
1607                                  * This is so that we will call alloc_disk if
1608                                  * this index is used again later.
1609                                 */
1610                                 for (i=0; i < CISS_MAX_LUN; i++){
1611                                         if(h->gendisk[i] == disk){
1612                                                 h->gendisk[i] = NULL;
1613                                                 break;
1614                                         }
1615                                 }
1616                                 put_disk(disk);
1617                         }
1618                 }
1619         } else {
1620                 set_capacity(disk, 0);
1621         }
1622
1623         --h->num_luns;
1624         /* zero out the disk size info */
1625         drv->nr_blocks = 0;
1626         drv->block_size = 0;
1627         drv->heads = 0;
1628         drv->sectors = 0;
1629         drv->cylinders = 0;
1630         drv->raid_level = -1;   /* This can be used as a flag variable to
1631                                  * indicate that this element of the drive
1632                                  * array is free.
1633                                  */
1634
1635         if (clear_all) {
1636                 /* check to see if it was the last disk */
1637                 if (drv == h->drv + h->highest_lun) {
1638                         /* if so, find the new hightest lun */
1639                         int i, newhighest = -1;
1640                         for (i = 0; i < h->highest_lun; i++) {
1641                                 /* if the disk has size > 0, it is available */
1642                                 if (h->drv[i].heads)
1643                                         newhighest = i;
1644                         }
1645                         h->highest_lun = newhighest;
1646                 }
1647
1648                 drv->LunID = 0;
1649         }
1650         return 0;
1651 }
1652
1653 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num,      /* 0: address the controller,
1654                                                                                                                            1: address logical volume log_unit,
1655                                                                                                                            2: periph device address is scsi3addr */
1656                     unsigned int log_unit, __u8 page_code,
1657                     unsigned char *scsi3addr, int cmd_type)
1658 {
1659         ctlr_info_t *h = hba[ctlr];
1660         u64bit buff_dma_handle;
1661         int status = IO_OK;
1662
1663         c->cmd_type = CMD_IOCTL_PEND;
1664         c->Header.ReplyQueue = 0;
1665         if (buff != NULL) {
1666                 c->Header.SGList = 1;
1667                 c->Header.SGTotal = 1;
1668         } else {
1669                 c->Header.SGList = 0;
1670                 c->Header.SGTotal = 0;
1671         }
1672         c->Header.Tag.lower = c->busaddr;
1673
1674         c->Request.Type.Type = cmd_type;
1675         if (cmd_type == TYPE_CMD) {
1676                 switch (cmd) {
1677                 case CISS_INQUIRY:
1678                         /* If the logical unit number is 0 then, this is going
1679                            to controller so It's a physical command
1680                            mode = 0 target = 0.  So we have nothing to write.
1681                            otherwise, if use_unit_num == 1,
1682                            mode = 1(volume set addressing) target = LUNID
1683                            otherwise, if use_unit_num == 2,
1684                            mode = 0(periph dev addr) target = scsi3addr */
1685                         if (use_unit_num == 1) {
1686                                 c->Header.LUN.LogDev.VolId =
1687                                     h->drv[log_unit].LunID;
1688                                 c->Header.LUN.LogDev.Mode = 1;
1689                         } else if (use_unit_num == 2) {
1690                                 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
1691                                        8);
1692                                 c->Header.LUN.LogDev.Mode = 0;
1693                         }
1694                         /* are we trying to read a vital product page */
1695                         if (page_code != 0) {
1696                                 c->Request.CDB[1] = 0x01;
1697                                 c->Request.CDB[2] = page_code;
1698                         }
1699                         c->Request.CDBLen = 6;
1700                         c->Request.Type.Attribute = ATTR_SIMPLE;
1701                         c->Request.Type.Direction = XFER_READ;
1702                         c->Request.Timeout = 0;
1703                         c->Request.CDB[0] = CISS_INQUIRY;
1704                         c->Request.CDB[4] = size & 0xFF;
1705                         break;
1706                 case CISS_REPORT_LOG:
1707                 case CISS_REPORT_PHYS:
1708                         /* Talking to controller so It's a physical command
1709                            mode = 00 target = 0.  Nothing to write.
1710                          */
1711                         c->Request.CDBLen = 12;
1712                         c->Request.Type.Attribute = ATTR_SIMPLE;
1713                         c->Request.Type.Direction = XFER_READ;
1714                         c->Request.Timeout = 0;
1715                         c->Request.CDB[0] = cmd;
1716                         c->Request.CDB[6] = (size >> 24) & 0xFF;        //MSB
1717                         c->Request.CDB[7] = (size >> 16) & 0xFF;
1718                         c->Request.CDB[8] = (size >> 8) & 0xFF;
1719                         c->Request.CDB[9] = size & 0xFF;
1720                         break;
1721
1722                 case CCISS_READ_CAPACITY:
1723                         c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1724                         c->Header.LUN.LogDev.Mode = 1;
1725                         c->Request.CDBLen = 10;
1726                         c->Request.Type.Attribute = ATTR_SIMPLE;
1727                         c->Request.Type.Direction = XFER_READ;
1728                         c->Request.Timeout = 0;
1729                         c->Request.CDB[0] = cmd;
1730                         break;
1731                 case CCISS_READ_CAPACITY_16:
1732                         c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1733                         c->Header.LUN.LogDev.Mode = 1;
1734                         c->Request.CDBLen = 16;
1735                         c->Request.Type.Attribute = ATTR_SIMPLE;
1736                         c->Request.Type.Direction = XFER_READ;
1737                         c->Request.Timeout = 0;
1738                         c->Request.CDB[0] = cmd;
1739                         c->Request.CDB[1] = 0x10;
1740                         c->Request.CDB[10] = (size >> 24) & 0xFF;
1741                         c->Request.CDB[11] = (size >> 16) & 0xFF;
1742                         c->Request.CDB[12] = (size >> 8) & 0xFF;
1743                         c->Request.CDB[13] = size & 0xFF;
1744                         c->Request.Timeout = 0;
1745                         c->Request.CDB[0] = cmd;
1746                         break;
1747                 case CCISS_CACHE_FLUSH:
1748                         c->Request.CDBLen = 12;
1749                         c->Request.Type.Attribute = ATTR_SIMPLE;
1750                         c->Request.Type.Direction = XFER_WRITE;
1751                         c->Request.Timeout = 0;
1752                         c->Request.CDB[0] = BMIC_WRITE;
1753                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
1754                         break;
1755                 default:
1756                         printk(KERN_WARNING
1757                                "cciss%d:  Unknown Command 0x%c\n", ctlr, cmd);
1758                         return IO_ERROR;
1759                 }
1760         } else if (cmd_type == TYPE_MSG) {
1761                 switch (cmd) {
1762                 case 0: /* ABORT message */
1763                         c->Request.CDBLen = 12;
1764                         c->Request.Type.Attribute = ATTR_SIMPLE;
1765                         c->Request.Type.Direction = XFER_WRITE;
1766                         c->Request.Timeout = 0;
1767                         c->Request.CDB[0] = cmd;        /* abort */
1768                         c->Request.CDB[1] = 0;  /* abort a command */
1769                         /* buff contains the tag of the command to abort */
1770                         memcpy(&c->Request.CDB[4], buff, 8);
1771                         break;
1772                 case 1: /* RESET message */
1773                         c->Request.CDBLen = 12;
1774                         c->Request.Type.Attribute = ATTR_SIMPLE;
1775                         c->Request.Type.Direction = XFER_WRITE;
1776                         c->Request.Timeout = 0;
1777                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
1778                         c->Request.CDB[0] = cmd;        /* reset */
1779                         c->Request.CDB[1] = 0x04;       /* reset a LUN */
1780                         break;
1781                 case 3: /* No-Op message */
1782                         c->Request.CDBLen = 1;
1783                         c->Request.Type.Attribute = ATTR_SIMPLE;
1784                         c->Request.Type.Direction = XFER_WRITE;
1785                         c->Request.Timeout = 0;
1786                         c->Request.CDB[0] = cmd;
1787                         break;
1788                 default:
1789                         printk(KERN_WARNING
1790                                "cciss%d: unknown message type %d\n", ctlr, cmd);
1791                         return IO_ERROR;
1792                 }
1793         } else {
1794                 printk(KERN_WARNING
1795                        "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1796                 return IO_ERROR;
1797         }
1798         /* Fill in the scatter gather information */
1799         if (size > 0) {
1800                 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
1801                                                              buff, size,
1802                                                              PCI_DMA_BIDIRECTIONAL);
1803                 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
1804                 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
1805                 c->SG[0].Len = size;
1806                 c->SG[0].Ext = 0;       /* we are not chaining */
1807         }
1808         return status;
1809 }
1810
1811 static int sendcmd_withirq(__u8 cmd,
1812                            int ctlr,
1813                            void *buff,
1814                            size_t size,
1815                            unsigned int use_unit_num,
1816                            unsigned int log_unit, __u8 page_code, int cmd_type)
1817 {
1818         ctlr_info_t *h = hba[ctlr];
1819         CommandList_struct *c;
1820         u64bit buff_dma_handle;
1821         unsigned long flags;
1822         int return_status;
1823         DECLARE_COMPLETION_ONSTACK(wait);
1824
1825         if ((c = cmd_alloc(h, 0)) == NULL)
1826                 return -ENOMEM;
1827         return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
1828                                  log_unit, page_code, NULL, cmd_type);
1829         if (return_status != IO_OK) {
1830                 cmd_free(h, c, 0);
1831                 return return_status;
1832         }
1833       resend_cmd2:
1834         c->waiting = &wait;
1835
1836         /* Put the request on the tail of the queue and send it */
1837         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1838         addQ(&h->reqQ, c);
1839         h->Qdepth++;
1840         start_io(h);
1841         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1842
1843         wait_for_completion(&wait);
1844
1845         if (c->err_info->CommandStatus != 0) {  /* an error has occurred */
1846                 switch (c->err_info->CommandStatus) {
1847                 case CMD_TARGET_STATUS:
1848                         printk(KERN_WARNING "cciss: cmd %p has "
1849                                " completed with errors\n", c);
1850                         if (c->err_info->ScsiStatus) {
1851                                 printk(KERN_WARNING "cciss: cmd %p "
1852                                        "has SCSI Status = %x\n",
1853                                        c, c->err_info->ScsiStatus);
1854                         }
1855
1856                         break;
1857                 case CMD_DATA_UNDERRUN:
1858                 case CMD_DATA_OVERRUN:
1859                         /* expected for inquire and report lun commands */
1860                         break;
1861                 case CMD_INVALID:
1862                         printk(KERN_WARNING "cciss: Cmd %p is "
1863                                "reported invalid\n", c);
1864                         return_status = IO_ERROR;
1865                         break;
1866                 case CMD_PROTOCOL_ERR:
1867                         printk(KERN_WARNING "cciss: cmd %p has "
1868                                "protocol error \n", c);
1869                         return_status = IO_ERROR;
1870                         break;
1871                 case CMD_HARDWARE_ERR:
1872                         printk(KERN_WARNING "cciss: cmd %p had "
1873                                " hardware error\n", c);
1874                         return_status = IO_ERROR;
1875                         break;
1876                 case CMD_CONNECTION_LOST:
1877                         printk(KERN_WARNING "cciss: cmd %p had "
1878                                "connection lost\n", c);
1879                         return_status = IO_ERROR;
1880                         break;
1881                 case CMD_ABORTED:
1882                         printk(KERN_WARNING "cciss: cmd %p was "
1883                                "aborted\n", c);
1884                         return_status = IO_ERROR;
1885                         break;
1886                 case CMD_ABORT_FAILED:
1887                         printk(KERN_WARNING "cciss: cmd %p reports "
1888                                "abort failed\n", c);
1889                         return_status = IO_ERROR;
1890                         break;
1891                 case CMD_UNSOLICITED_ABORT:
1892                         printk(KERN_WARNING
1893                                "cciss%d: unsolicited abort %p\n", ctlr, c);
1894                         if (c->retry_count < MAX_CMD_RETRIES) {
1895                                 printk(KERN_WARNING
1896                                        "cciss%d: retrying %p\n", ctlr, c);
1897                                 c->retry_count++;
1898                                 /* erase the old error information */
1899                                 memset(c->err_info, 0,
1900                                        sizeof(ErrorInfo_struct));
1901                                 return_status = IO_OK;
1902                                 INIT_COMPLETION(wait);
1903                                 goto resend_cmd2;
1904                         }
1905                         return_status = IO_ERROR;
1906                         break;
1907                 default:
1908                         printk(KERN_WARNING "cciss: cmd %p returned "
1909                                "unknown status %x\n", c,
1910                                c->err_info->CommandStatus);
1911                         return_status = IO_ERROR;
1912                 }
1913         }
1914         /* unlock the buffers from DMA */
1915         buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
1916         buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
1917         pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
1918                          c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
1919         cmd_free(h, c, 0);
1920         return return_status;
1921 }
1922
1923 static void cciss_geometry_inquiry(int ctlr, int logvol,
1924                                    int withirq, sector_t total_size,
1925                                    unsigned int block_size,
1926                                    InquiryData_struct *inq_buff,
1927                                    drive_info_struct *drv)
1928 {
1929         int return_code;
1930         unsigned long t;
1931
1932         memset(inq_buff, 0, sizeof(InquiryData_struct));
1933         if (withirq)
1934                 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
1935                                               inq_buff, sizeof(*inq_buff), 1,
1936                                               logvol, 0xC1, TYPE_CMD);
1937         else
1938                 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
1939                                       sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
1940                                       TYPE_CMD);
1941         if (return_code == IO_OK) {
1942                 if (inq_buff->data_byte[8] == 0xFF) {
1943                         printk(KERN_WARNING
1944                                "cciss: reading geometry failed, volume "
1945                                "does not support reading geometry\n");
1946                         drv->heads = 255;
1947                         drv->sectors = 32;      // Sectors per track
1948                         drv->cylinders = total_size + 1;
1949                         drv->raid_level = RAID_UNKNOWN;
1950                 } else {
1951                         drv->heads = inq_buff->data_byte[6];
1952                         drv->sectors = inq_buff->data_byte[7];
1953                         drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
1954                         drv->cylinders += inq_buff->data_byte[5];
1955                         drv->raid_level = inq_buff->data_byte[8];
1956                 }
1957                 drv->block_size = block_size;
1958                 drv->nr_blocks = total_size + 1;
1959                 t = drv->heads * drv->sectors;
1960                 if (t > 1) {
1961                         sector_t real_size = total_size + 1;
1962                         unsigned long rem = sector_div(real_size, t);
1963                         if (rem)
1964                                 real_size++;
1965                         drv->cylinders = real_size;
1966                 }
1967         } else {                /* Get geometry failed */
1968                 printk(KERN_WARNING "cciss: reading geometry failed\n");
1969         }
1970         printk(KERN_INFO "      heads=%d, sectors=%d, cylinders=%d\n\n",
1971                drv->heads, drv->sectors, drv->cylinders);
1972 }
1973
1974 static void
1975 cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
1976                     unsigned int *block_size)
1977 {
1978         ReadCapdata_struct *buf;
1979         int return_code;
1980         buf = kmalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
1981         if (buf == NULL) {
1982                 printk(KERN_WARNING "cciss: out of memory\n");
1983                 return;
1984         }
1985         memset(buf, 0, sizeof(ReadCapdata_struct));
1986         if (withirq)
1987                 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
1988                                 ctlr, buf, sizeof(ReadCapdata_struct),
1989                                         1, logvol, 0, TYPE_CMD);
1990         else
1991                 return_code = sendcmd(CCISS_READ_CAPACITY,
1992                                 ctlr, buf, sizeof(ReadCapdata_struct),
1993                                         1, logvol, 0, NULL, TYPE_CMD);
1994         if (return_code == IO_OK) {
1995                 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
1996                 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
1997         } else {                /* read capacity command failed */
1998                 printk(KERN_WARNING "cciss: read capacity failed\n");
1999                 *total_size = 0;
2000                 *block_size = BLOCK_SIZE;
2001         }
2002         if (*total_size != 0)
2003                 printk(KERN_INFO "      blocks= %llu block_size= %d\n",
2004                 (unsigned long long)*total_size+1, *block_size);
2005         kfree(buf);
2006         return;
2007 }
2008
2009 static void
2010 cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size,                                 unsigned int *block_size)
2011 {
2012         ReadCapdata_struct_16 *buf;
2013         int return_code;
2014         buf = kmalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2015         if (buf == NULL) {
2016                 printk(KERN_WARNING "cciss: out of memory\n");
2017                 return;
2018         }
2019         memset(buf, 0, sizeof(ReadCapdata_struct_16));
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) {
2031                 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2032                 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
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         }
2038         printk(KERN_INFO "      blocks= %llu block_size= %d\n",
2039                (unsigned long long)*total_size+1, *block_size);
2040         kfree(buf);
2041         return;
2042 }
2043
2044 static int cciss_revalidate(struct gendisk *disk)
2045 {
2046         ctlr_info_t *h = get_host(disk);
2047         drive_info_struct *drv = get_drv(disk);
2048         int logvol;
2049         int FOUND = 0;
2050         unsigned int block_size;
2051         sector_t total_size;
2052         InquiryData_struct *inq_buff = NULL;
2053
2054         for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2055                 if (h->drv[logvol].LunID == drv->LunID) {
2056                         FOUND = 1;
2057                         break;
2058                 }
2059         }
2060
2061         if (!FOUND)
2062                 return 1;
2063
2064         inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2065         if (inq_buff == NULL) {
2066                 printk(KERN_WARNING "cciss: out of memory\n");
2067                 return 1;
2068         }
2069         if (h->cciss_read == CCISS_READ_10) {
2070                 cciss_read_capacity(h->ctlr, logvol, 1,
2071                                         &total_size, &block_size);
2072         } else {
2073                 cciss_read_capacity_16(h->ctlr, logvol, 1,
2074                                         &total_size, &block_size);
2075         }
2076         cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2077                                inq_buff, drv);
2078
2079         blk_queue_hardsect_size(drv->queue, drv->block_size);
2080         set_capacity(disk, drv->nr_blocks);
2081
2082         kfree(inq_buff);
2083         return 0;
2084 }
2085
2086 /*
2087  *   Wait polling for a command to complete.
2088  *   The memory mapped FIFO is polled for the completion.
2089  *   Used only at init time, interrupts from the HBA are disabled.
2090  */
2091 static unsigned long pollcomplete(int ctlr)
2092 {
2093         unsigned long done;
2094         int i;
2095
2096         /* Wait (up to 20 seconds) for a command to complete */
2097
2098         for (i = 20 * HZ; i > 0; i--) {
2099                 done = hba[ctlr]->access.command_completed(hba[ctlr]);
2100                 if (done == FIFO_EMPTY)
2101                         schedule_timeout_uninterruptible(1);
2102                 else
2103                         return done;
2104         }
2105         /* Invalid address to tell caller we ran out of time */
2106         return 1;
2107 }
2108
2109 static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2110 {
2111         /* We get in here if sendcmd() is polling for completions
2112            and gets some command back that it wasn't expecting --
2113            something other than that which it just sent down.
2114            Ordinarily, that shouldn't happen, but it can happen when
2115            the scsi tape stuff gets into error handling mode, and
2116            starts using sendcmd() to try to abort commands and
2117            reset tape drives.  In that case, sendcmd may pick up
2118            completions of commands that were sent to logical drives
2119            through the block i/o system, or cciss ioctls completing, etc.
2120            In that case, we need to save those completions for later
2121            processing by the interrupt handler.
2122          */
2123
2124 #ifdef CONFIG_CISS_SCSI_TAPE
2125         struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
2126
2127         /* If it's not the scsi tape stuff doing error handling, (abort */
2128         /* or reset) then we don't expect anything weird. */
2129         if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2130 #endif
2131                 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2132                        "Invalid command list address returned! (%lx)\n",
2133                        ctlr, complete);
2134                 /* not much we can do. */
2135 #ifdef CONFIG_CISS_SCSI_TAPE
2136                 return 1;
2137         }
2138
2139         /* We've sent down an abort or reset, but something else
2140            has completed */
2141         if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
2142                 /* Uh oh.  No room to save it for later... */
2143                 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
2144                        "reject list overflow, command lost!\n", ctlr);
2145                 return 1;
2146         }
2147         /* Save it for later */
2148         srl->complete[srl->ncompletions] = complete;
2149         srl->ncompletions++;
2150 #endif
2151         return 0;
2152 }
2153
2154 /*
2155  * Send a command to the controller, and wait for it to complete.
2156  * Only used at init time.
2157  */
2158 static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num,      /* 0: address the controller,
2159                                                                                                    1: address logical volume log_unit,
2160                                                                                                    2: periph device address is scsi3addr */
2161                    unsigned int log_unit,
2162                    __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2163 {
2164         CommandList_struct *c;
2165         int i;
2166         unsigned long complete;
2167         ctlr_info_t *info_p = hba[ctlr];
2168         u64bit buff_dma_handle;
2169         int status, done = 0;
2170
2171         if ((c = cmd_alloc(info_p, 1)) == NULL) {
2172                 printk(KERN_WARNING "cciss: unable to get memory");
2173                 return IO_ERROR;
2174         }
2175         status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2176                           log_unit, page_code, scsi3addr, cmd_type);
2177         if (status != IO_OK) {
2178                 cmd_free(info_p, c, 1);
2179                 return status;
2180         }
2181       resend_cmd1:
2182         /*
2183          * Disable interrupt
2184          */
2185 #ifdef CCISS_DEBUG
2186         printk(KERN_DEBUG "cciss: turning intr off\n");
2187 #endif                          /* CCISS_DEBUG */
2188         info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
2189
2190         /* Make sure there is room in the command FIFO */
2191         /* Actually it should be completely empty at this time */
2192         /* unless we are in here doing error handling for the scsi */
2193         /* tape side of the driver. */
2194         for (i = 200000; i > 0; i--) {
2195                 /* if fifo isn't full go */
2196                 if (!(info_p->access.fifo_full(info_p))) {
2197
2198                         break;
2199                 }
2200                 udelay(10);
2201                 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
2202                        " waiting!\n", ctlr);
2203         }
2204         /*
2205          * Send the cmd
2206          */
2207         info_p->access.submit_command(info_p, c);
2208         done = 0;
2209         do {
2210                 complete = pollcomplete(ctlr);
2211
2212 #ifdef CCISS_DEBUG
2213                 printk(KERN_DEBUG "cciss: command completed\n");
2214 #endif                          /* CCISS_DEBUG */
2215
2216                 if (complete == 1) {
2217                         printk(KERN_WARNING
2218                                "cciss cciss%d: SendCmd Timeout out, "
2219                                "No command list address returned!\n", ctlr);
2220                         status = IO_ERROR;
2221                         done = 1;
2222                         break;
2223                 }
2224
2225                 /* This will need to change for direct lookup completions */
2226                 if ((complete & CISS_ERROR_BIT)
2227                     && (complete & ~CISS_ERROR_BIT) == c->busaddr) {
2228                         /* if data overrun or underun on Report command
2229                            ignore it
2230                          */
2231                         if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2232                              (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2233                              (c->Request.CDB[0] == CISS_INQUIRY)) &&
2234                             ((c->err_info->CommandStatus ==
2235                               CMD_DATA_OVERRUN) ||
2236                              (c->err_info->CommandStatus == CMD_DATA_UNDERRUN)
2237                             )) {
2238                                 complete = c->busaddr;
2239                         } else {
2240                                 if (c->err_info->CommandStatus ==
2241                                     CMD_UNSOLICITED_ABORT) {
2242                                         printk(KERN_WARNING "cciss%d: "
2243                                                "unsolicited abort %p\n",
2244                                                ctlr, c);
2245                                         if (c->retry_count < MAX_CMD_RETRIES) {
2246                                                 printk(KERN_WARNING
2247                                                        "cciss%d: retrying %p\n",
2248                                                        ctlr, c);
2249                                                 c->retry_count++;
2250                                                 /* erase the old error */
2251                                                 /* information */
2252                                                 memset(c->err_info, 0,
2253                                                        sizeof
2254                                                        (ErrorInfo_struct));
2255                                                 goto resend_cmd1;
2256                                         } else {
2257                                                 printk(KERN_WARNING
2258                                                        "cciss%d: retried %p too "
2259                                                        "many times\n", ctlr, c);
2260                                                 status = IO_ERROR;
2261                                                 goto cleanup1;
2262                                         }
2263                                 } else if (c->err_info->CommandStatus ==
2264                                            CMD_UNABORTABLE) {
2265                                         printk(KERN_WARNING
2266                                                "cciss%d: command could not be aborted.\n",
2267                                                ctlr);
2268                                         status = IO_ERROR;
2269                                         goto cleanup1;
2270                                 }
2271                                 printk(KERN_WARNING "ciss ciss%d: sendcmd"
2272                                        " Error %x \n", ctlr,
2273                                        c->err_info->CommandStatus);
2274                                 printk(KERN_WARNING "ciss ciss%d: sendcmd"
2275                                        " offensive info\n"
2276                                        "  size %x\n   num %x   value %x\n",
2277                                        ctlr,
2278                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2279                                        offense_size,
2280                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2281                                        offense_num,
2282                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2283                                        offense_value);
2284                                 status = IO_ERROR;
2285                                 goto cleanup1;
2286                         }
2287                 }
2288                 /* This will need changing for direct lookup completions */
2289                 if (complete != c->busaddr) {
2290                         if (add_sendcmd_reject(cmd, ctlr, complete) != 0) {
2291                                 BUG();  /* we are pretty much hosed if we get here. */
2292                         }
2293                         continue;
2294                 } else
2295                         done = 1;
2296         } while (!done);
2297
2298       cleanup1:
2299         /* unlock the data buffer from DMA */
2300         buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2301         buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2302         pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
2303                          c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2304 #ifdef CONFIG_CISS_SCSI_TAPE
2305         /* if we saved some commands for later, process them now. */
2306         if (info_p->scsi_rejects.ncompletions > 0)
2307                 do_cciss_intr(0, info_p);
2308 #endif
2309         cmd_free(info_p, c, 1);
2310         return status;
2311 }
2312
2313 /*
2314  * Map (physical) PCI mem into (virtual) kernel space
2315  */
2316 static void __iomem *remap_pci_mem(ulong base, ulong size)
2317 {
2318         ulong page_base = ((ulong) base) & PAGE_MASK;
2319         ulong page_offs = ((ulong) base) - page_base;
2320         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2321
2322         return page_remapped ? (page_remapped + page_offs) : NULL;
2323 }
2324
2325 /*
2326  * Takes jobs of the Q and sends them to the hardware, then puts it on
2327  * the Q to wait for completion.
2328  */
2329 static void start_io(ctlr_info_t *h)
2330 {
2331         CommandList_struct *c;
2332
2333         while ((c = h->reqQ) != NULL) {
2334                 /* can't do anything if fifo is full */
2335                 if ((h->access.fifo_full(h))) {
2336                         printk(KERN_WARNING "cciss: fifo full\n");
2337                         break;
2338                 }
2339
2340                 /* Get the first entry from the Request Q */
2341                 removeQ(&(h->reqQ), c);
2342                 h->Qdepth--;
2343
2344                 /* Tell the controller execute command */
2345                 h->access.submit_command(h, c);
2346
2347                 /* Put job onto the completed Q */
2348                 addQ(&(h->cmpQ), c);
2349         }
2350 }
2351
2352 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2353 /* Zeros out the error record and then resends the command back */
2354 /* to the controller */
2355 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2356 {
2357         /* erase the old error information */
2358         memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2359
2360         /* add it to software queue and then send it to the controller */
2361         addQ(&(h->reqQ), c);
2362         h->Qdepth++;
2363         if (h->Qdepth > h->maxQsinceinit)
2364                 h->maxQsinceinit = h->Qdepth;
2365
2366         start_io(h);
2367 }
2368
2369 static inline int evaluate_target_status(CommandList_struct *cmd)
2370 {
2371         unsigned char sense_key;
2372         int error_count = 1;
2373
2374         if (cmd->err_info->ScsiStatus != 0x02) { /* not check condition? */
2375                 if (!blk_pc_request(cmd->rq))
2376                         printk(KERN_WARNING "cciss: cmd %p "
2377                                "has SCSI Status 0x%x\n",
2378                                cmd, cmd->err_info->ScsiStatus);
2379                 return error_count;
2380         }
2381
2382         /* check the sense key */
2383         sense_key = 0xf & cmd->err_info->SenseInfo[2];
2384         /* no status or recovered error */
2385         if ((sense_key == 0x0) || (sense_key == 0x1))
2386                 error_count = 0;
2387
2388         if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
2389                 if (error_count != 0)
2390                         printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2391                                " sense key = 0x%x\n", cmd, sense_key);
2392                 return error_count;
2393         }
2394
2395         /* SG_IO or similar, copy sense data back */
2396         if (cmd->rq->sense) {
2397                 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2398                         cmd->rq->sense_len = cmd->err_info->SenseLen;
2399                 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2400                         cmd->rq->sense_len);
2401         } else
2402                 cmd->rq->sense_len = 0;
2403
2404         return error_count;
2405 }
2406
2407 /* checks the status of the job and calls complete buffers to mark all
2408  * buffers for the completed job. Note that this function does not need
2409  * to hold the hba/queue lock.
2410  */
2411 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2412                                     int timeout)
2413 {
2414         int retry_cmd = 0;
2415         struct request *rq = cmd->rq;
2416
2417         rq->errors = 0;
2418
2419         if (timeout)
2420                 rq->errors = 1;
2421
2422         if (cmd->err_info->CommandStatus == 0)  /* no error has occurred */
2423                 goto after_error_processing;
2424
2425         switch (cmd->err_info->CommandStatus) {
2426         case CMD_TARGET_STATUS:
2427                 rq->errors = evaluate_target_status(cmd);
2428                 break;
2429         case CMD_DATA_UNDERRUN:
2430                 if (blk_fs_request(cmd->rq)) {
2431                         printk(KERN_WARNING "cciss: cmd %p has"
2432                                " completed with data underrun "
2433                                "reported\n", cmd);
2434                         cmd->rq->data_len = cmd->err_info->ResidualCnt;
2435                 }
2436                 break;
2437         case CMD_DATA_OVERRUN:
2438                 if (blk_fs_request(cmd->rq))
2439                         printk(KERN_WARNING "cciss: cmd %p has"
2440                                " completed with data overrun "
2441                                "reported\n", cmd);
2442                 break;
2443         case CMD_INVALID:
2444                 printk(KERN_WARNING "cciss: cmd %p is "
2445                        "reported invalid\n", cmd);
2446                 rq->errors = 1;
2447                 break;
2448         case CMD_PROTOCOL_ERR:
2449                 printk(KERN_WARNING "cciss: cmd %p has "
2450                        "protocol error \n", cmd);
2451                 rq->errors = 1;
2452                 break;
2453         case CMD_HARDWARE_ERR:
2454                 printk(KERN_WARNING "cciss: cmd %p had "
2455                        " hardware error\n", cmd);
2456                 rq->errors = 1;
2457                 break;
2458         case CMD_CONNECTION_LOST:
2459                 printk(KERN_WARNING "cciss: cmd %p had "
2460                        "connection lost\n", cmd);
2461                 rq->errors = 1;
2462                 break;
2463         case CMD_ABORTED:
2464                 printk(KERN_WARNING "cciss: cmd %p was "
2465                        "aborted\n", cmd);
2466                 rq->errors = 1;
2467                 break;
2468         case CMD_ABORT_FAILED:
2469                 printk(KERN_WARNING "cciss: cmd %p reports "
2470                        "abort failed\n", cmd);
2471                 rq->errors = 1;
2472                 break;
2473         case CMD_UNSOLICITED_ABORT:
2474                 printk(KERN_WARNING "cciss%d: unsolicited "
2475                        "abort %p\n", h->ctlr, cmd);
2476                 if (cmd->retry_count < MAX_CMD_RETRIES) {
2477                         retry_cmd = 1;
2478                         printk(KERN_WARNING
2479                                "cciss%d: retrying %p\n", h->ctlr, cmd);
2480                         cmd->retry_count++;
2481                 } else
2482                         printk(KERN_WARNING
2483                                "cciss%d: %p retried too "
2484                                "many times\n", h->ctlr, cmd);
2485                 rq->errors = 1;
2486                 break;
2487         case CMD_TIMEOUT:
2488                 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
2489                 rq->errors = 1;
2490                 break;
2491         default:
2492                 printk(KERN_WARNING "cciss: cmd %p returned "
2493                        "unknown status %x\n", cmd,
2494                        cmd->err_info->CommandStatus);
2495                 rq->errors = 1;
2496         }
2497
2498 after_error_processing:
2499
2500         /* We need to return this command */
2501         if (retry_cmd) {
2502                 resend_cciss_cmd(h, cmd);
2503                 return;
2504         }
2505         cmd->rq->data_len = 0;
2506         cmd->rq->completion_data = cmd;
2507         blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
2508         blk_complete_request(cmd->rq);
2509 }
2510
2511 /*
2512  * Get a request and submit it to the controller.
2513  */
2514 static void do_cciss_request(request_queue_t *q)
2515 {
2516         ctlr_info_t *h = q->queuedata;
2517         CommandList_struct *c;
2518         sector_t start_blk;
2519         int seg;
2520         struct request *creq;
2521         u64bit temp64;
2522         struct scatterlist tmp_sg[MAXSGENTRIES];
2523         drive_info_struct *drv;
2524         int i, dir;
2525
2526         /* We call start_io here in case there is a command waiting on the
2527          * queue that has not been sent.
2528          */
2529         if (blk_queue_plugged(q))
2530                 goto startio;
2531
2532       queue:
2533         creq = elv_next_request(q);
2534         if (!creq)
2535                 goto startio;
2536
2537         BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
2538
2539         if ((c = cmd_alloc(h, 1)) == NULL)
2540                 goto full;
2541
2542         blkdev_dequeue_request(creq);
2543
2544         spin_unlock_irq(q->queue_lock);
2545
2546         c->cmd_type = CMD_RWREQ;
2547         c->rq = creq;
2548
2549         /* fill in the request */
2550         drv = creq->rq_disk->private_data;
2551         c->Header.ReplyQueue = 0;       // unused in simple mode
2552         /* got command from pool, so use the command block index instead */
2553         /* for direct lookups. */
2554         /* The first 2 bits are reserved for controller error reporting. */
2555         c->Header.Tag.lower = (c->cmdindex << 3);
2556         c->Header.Tag.lower |= 0x04;    /* flag for direct lookup. */
2557         c->Header.LUN.LogDev.VolId = drv->LunID;
2558         c->Header.LUN.LogDev.Mode = 1;
2559         c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
2560         c->Request.Type.Type = TYPE_CMD;        // It is a command.
2561         c->Request.Type.Attribute = ATTR_SIMPLE;
2562         c->Request.Type.Direction =
2563             (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
2564         c->Request.Timeout = 0; // Don't time out
2565         c->Request.CDB[0] =
2566             (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
2567         start_blk = creq->sector;
2568 #ifdef CCISS_DEBUG
2569         printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", (int)creq->sector,
2570                (int)creq->nr_sectors);
2571 #endif                          /* CCISS_DEBUG */
2572
2573         seg = blk_rq_map_sg(q, creq, tmp_sg);
2574
2575         /* get the DMA records for the setup */
2576         if (c->Request.Type.Direction == XFER_READ)
2577                 dir = PCI_DMA_FROMDEVICE;
2578         else
2579                 dir = PCI_DMA_TODEVICE;
2580
2581         for (i = 0; i < seg; i++) {
2582                 c->SG[i].Len = tmp_sg[i].length;
2583                 temp64.val = (__u64) pci_map_page(h->pdev, tmp_sg[i].page,
2584                                                   tmp_sg[i].offset,
2585                                                   tmp_sg[i].length, dir);
2586                 c->SG[i].Addr.lower = temp64.val32.lower;
2587                 c->SG[i].Addr.upper = temp64.val32.upper;
2588                 c->SG[i].Ext = 0;       // we are not chaining
2589         }
2590         /* track how many SG entries we are using */
2591         if (seg > h->maxSG)
2592                 h->maxSG = seg;
2593
2594 #ifdef CCISS_DEBUG
2595         printk(KERN_DEBUG "cciss: Submitting %d sectors in %d segments\n",
2596                creq->nr_sectors, seg);
2597 #endif                          /* CCISS_DEBUG */
2598
2599         c->Header.SGList = c->Header.SGTotal = seg;
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);
2631         } else {
2632                 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
2633                 BUG();
2634         }
2635
2636         spin_lock_irq(q->queue_lock);
2637
2638         addQ(&(h->reqQ), c);
2639         h->Qdepth++;
2640         if (h->Qdepth > h->maxQsinceinit)
2641                 h->maxQsinceinit = h->Qdepth;
2642
2643         goto queue;
2644 full:
2645         blk_stop_queue(q);
2646 startio:
2647         /* We will already have the driver lock here so not need
2648          * to lock it.
2649          */
2650         start_io(h);
2651 }
2652
2653 static 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
2673 static inline int interrupt_pending(ctlr_info_t *h)
2674 {
2675 #ifdef CONFIG_CISS_SCSI_TAPE
2676         return (h->access.intr_pending(h)
2677                 || (h->scsi_rejects.ncompletions > 0));
2678 #else
2679         return h->access.intr_pending(h);
2680 #endif
2681 }
2682
2683 static inline long interrupt_not_for_us(ctlr_info_t *h)
2684 {
2685 #ifdef CONFIG_CISS_SCSI_TAPE
2686         return (((h->access.intr_pending(h) == 0) ||
2687                  (h->interrupts_enabled == 0))
2688                 && (h->scsi_rejects.ncompletions == 0));
2689 #else
2690         return (((h->access.intr_pending(h) == 0) ||
2691                  (h->interrupts_enabled == 0)));
2692 #endif
2693 }
2694
2695 static irqreturn_t do_cciss_intr(int irq, void *dev_id)
2696 {
2697         ctlr_info_t *h = dev_id;
2698         CommandList_struct *c;
2699         unsigned long flags;
2700         __u32 a, a1, a2;
2701
2702         if (interrupt_not_for_us(h))
2703                 return IRQ_NONE;
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);
2709         while (interrupt_pending(h)) {
2710                 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
2711                         a1 = a;
2712                         if ((a & 0x04)) {
2713                                 a2 = (a >> 3);
2714                                 if (a2 >= h->nr_cmds) {
2715                                         printk(KERN_WARNING
2716                                                "cciss: controller cciss%d failed, stopping.\n",
2717                                                h->ctlr);
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 {
2726                                 a &= ~3;
2727                                 if ((c = h->cmpQ) == NULL) {
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                                 }
2738                         }
2739                         /*
2740                          * If we've found the command, take it off the
2741                          * completion Q and free it
2742                          */
2743                         if (c->busaddr == a) {
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
2759         spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2760         return IRQ_HANDLED;
2761 }
2762
2763 /*
2764  *  We cannot read the structure directly, for portability we must use
2765  *   the io functions.
2766  *   This is for debug only.
2767  */
2768 #ifdef CCISS_DEBUG
2769 static void print_cfg_table(CfgTable_struct *tb)
2770 {
2771         int i;
2772         char temp_name[17];
2773
2774         printk("Controller Configuration information\n");
2775         printk("------------------------------------\n");
2776         for (i = 0; i < 4; i++)
2777                 temp_name[i] = readb(&(tb->Signature[i]));
2778         temp_name[4] = '\0';
2779         printk("   Signature = %s\n", temp_name);
2780         printk("   Spec Number = %d\n", readl(&(tb->SpecValence)));
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)));
2787         printk("   Coalesce Interrupt Delay = 0x%x\n",
2788                readl(&(tb->HostWrite.CoalIntDelay)));
2789         printk("   Coalesce Interrupt Count = 0x%x\n",
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++)
2795                 temp_name[i] = readb(&(tb->ServerName[i]));
2796         temp_name[16] = '\0';
2797         printk("   Server Name = %s\n", temp_name);
2798         printk("   Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
2799 }
2800 #endif                          /* CCISS_DEBUG */
2801
2802 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
2803 {
2804         int i, offset, mem_type, bar_type;
2805         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
2806                 return 0;
2807         offset = 0;
2808         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
2809                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
2810                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
2811                         offset += 4;
2812                 else {
2813                         mem_type = pci_resource_flags(pdev, i) &
2814                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
2815                         switch (mem_type) {
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;
2827                                 break;
2828                         }
2829                 }
2830                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
2831                         return i + 1;
2832         }
2833         return -1;
2834 }
2835
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
2840 static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
2841                                            struct pci_dev *pdev, __u32 board_id)
2842 {
2843 #ifdef CONFIG_PCI_MSI
2844         int err;
2845         struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
2846         {0, 2}, {0, 3}
2847         };
2848
2849         /* Some boards advertise MSI but don't really support it */
2850         if ((board_id == 0x40700E11) ||
2851             (board_id == 0x40800E11) ||
2852             (board_id == 0x40820E11) || (board_id == 0x40830E11))
2853                 goto default_int_mode;
2854
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);
2868                         goto default_int_mode;
2869                 } else {
2870                         printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
2871                                err);
2872                         goto default_int_mode;
2873                 }
2874         }
2875         if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
2876                 if (!pci_enable_msi(pdev)) {
2877                         c->msi_vector = 1;
2878                 } else {
2879                         printk(KERN_WARNING "cciss: MSI init failed\n");
2880                 }
2881         }
2882 default_int_mode:
2883 #endif                          /* CONFIG_PCI_MSI */
2884         /* if we get here we're going to use the default interrupt mode */
2885         c->intr[SIMPLE_MODE_INT] = pdev->irq;
2886         return;
2887 }
2888
2889 static 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;
2896         int i, err;
2897
2898         /* check to see if controller has been disabled */
2899         /* BEFORE trying to enable it */
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");
2904                 return -ENODEV;
2905         }
2906
2907         err = pci_enable_device(pdev);
2908         if (err) {
2909                 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
2910                 return err;
2911         }
2912
2913         err = pci_request_regions(pdev, "cciss");
2914         if (err) {
2915                 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
2916                        "aborting\n");
2917                 return err;
2918         }
2919
2920         subsystem_vendor_id = pdev->subsystem_vendor;
2921         subsystem_device_id = pdev->subsystem_device;
2922         board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
2923                     subsystem_vendor_id);
2924
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);
2929 #endif                          /* CCISS_DEBUG */
2930
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);
2935
2936         /*
2937          * Memory base addr is first addr , the second points to the config
2938          *   table
2939          */
2940
2941         c->paddr = pci_resource_start(pdev, 0); /* addressing mode bits already removed */
2942 #ifdef CCISS_DEBUG
2943         printk("address 0 = %x\n", c->paddr);
2944 #endif                          /* CCISS_DEBUG */
2945         c->vaddr = remap_pci_mem(c->paddr, 0x250);
2946
2947         /* Wait for the board to become ready.  (PCI hotplug needs this.)
2948          * We poll for up to 120 secs, once per 100ms. */
2949         for (i = 0; i < 1200; i++) {
2950                 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
2951                 if (scratchpad == CCISS_FIRMWARE_READY)
2952                         break;
2953                 set_current_state(TASK_INTERRUPTIBLE);
2954                 schedule_timeout(HZ / 10);      /* wait 100ms */
2955         }
2956         if (scratchpad != CCISS_FIRMWARE_READY) {
2957                 printk(KERN_WARNING "cciss: Board not ready.  Timed out.\n");
2958                 err = -ENODEV;
2959                 goto err_out_free_res;
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);
2967 #endif                          /* CCISS_DEBUG */
2968         cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
2969 #ifdef CCISS_DEBUG
2970         printk("cfg base address index = %x\n", cfg_base_addr_index);
2971 #endif                          /* CCISS_DEBUG */
2972         if (cfg_base_addr_index == -1) {
2973                 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
2974                 err = -ENODEV;
2975                 goto err_out_free_res;
2976         }
2977
2978         cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
2979 #ifdef CCISS_DEBUG
2980         printk("cfg offset = %x\n", cfg_offset);
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));
2985         c->board_id = board_id;
2986
2987 #ifdef CCISS_DEBUG
2988         print_cfg_table(c->cfgtable);
2989 #endif                          /* CCISS_DEBUG */
2990
2991         for (i = 0; i < ARRAY_SIZE(products); i++) {
2992                 if (board_id == products[i].board_id) {
2993                         c->product_name = products[i].product_name;
2994                         c->access = *(products[i].access);
2995                         c->nr_cmds = products[i].nr_cmds;
2996                         break;
2997                 }
2998         }
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')) {
3003                 printk("Does not appear to be a valid CISS config table\n");
3004                 err = -ENODEV;
3005                 goto err_out_free_res;
3006         }
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);
3015                         c->nr_cmds = products[i-1].nr_cmds;
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         }
3028 #ifdef CONFIG_X86
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         }
3036 #endif
3037
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
3049 #ifdef CCISS_DEBUG
3050         printk("Trying to put board into Simple mode\n");
3051 #endif                          /* CCISS_DEBUG */
3052         c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
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);
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.) */
3060         for (i = 0; i < MAX_CONFIG_WAIT; i++) {
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);
3066         }
3067
3068 #ifdef CCISS_DEBUG
3069         printk(KERN_DEBUG "I counter got to %d %x\n", i,
3070                readl(c->vaddr + SA5_DOORBELL));
3071 #endif                          /* CCISS_DEBUG */
3072 #ifdef CCISS_DEBUG
3073         print_cfg_table(c->cfgtable);
3074 #endif                          /* CCISS_DEBUG */
3075
3076         if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3077                 printk(KERN_WARNING "cciss: unable to get board into"
3078                        " simple mode\n");
3079                 err = -ENODEV;
3080                 goto err_out_free_res;
3081         }
3082         return 0;
3083
3084 err_out_free_res:
3085         /*
3086          * Deliberately omit pci_disable_device(): it does something nasty to
3087          * Smart Array controllers that pci_enable_device does not undo
3088          */
3089         pci_release_regions(pdev);
3090         return err;
3091 }
3092
3093 /*
3094  * Gets information about the local volumes attached to the controller.
3095  */
3096 static void cciss_getgeometry(int cntl_num)
3097 {
3098         ReportLunData_struct *ld_buff;
3099         InquiryData_struct *inq_buff;
3100         int return_code;
3101         int i;
3102         int listlength = 0;
3103         __u32 lunid = 0;
3104         int block_size;
3105         sector_t total_size;
3106
3107         ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
3108         if (ld_buff == NULL) {
3109                 printk(KERN_ERR "cciss: out of memory\n");
3110                 return;
3111         }
3112         inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
3113         if (inq_buff == NULL) {
3114                 printk(KERN_ERR "cciss: out of memory\n");
3115                 kfree(ld_buff);
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) {
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];
3127         } else {                /* send command failed */
3128
3129                 printk(KERN_WARNING "cciss: unable to determine firmware"
3130                        " version of controller\n");
3131         }
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);
3136
3137         if (return_code == IO_OK) {
3138 #ifdef CCISS_DEBUG
3139                 printk("LUN Data\n--------------------------\n");
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;
3148                 listlength |= 0xff & (unsigned int)(ld_buff->LUNListLength[3]);
3149         } else {                /* reading number of logical volumes failed */
3150
3151                 printk(KERN_WARNING "cciss: report logical volume"
3152                        " command failed\n");
3153                 listlength = 0;
3154         }
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);
3160                 hba[cntl_num]->num_luns = CISS_MAX_LUN;
3161         }
3162 #ifdef CCISS_DEBUG
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;
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;
3181
3182 #ifdef CCISS_DEBUG
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 */
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,
3192                                             &total_size, &block_size);
3193                         goto geo_inq;
3194                 }
3195                 cciss_read_capacity(cntl_num, i, 0, &total_size, &block_size);
3196
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) {
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                 }
3208 geo_inq:
3209                         cciss_geometry_inquiry(cntl_num, i, 0, total_size,
3210                                                block_size, inq_buff,
3211                                                &hba[cntl_num]->drv[i]);
3212                 } else {
3213                         /* initialize raid_level to indicate a free space */
3214                         hba[cntl_num]->drv[i].raid_level = -1;
3215                 }
3216         }
3217         kfree(ld_buff);
3218         kfree(inq_buff);
3219 }
3220
3221 /* Function to find the first free pointer into our hba[] array */
3222 /* Returns -1 if no free entries are left.  */
3223 static int alloc_cciss_hba(void)
3224 {
3225         int i;
3226
3227         for (i = 0; i < MAX_CTLR; i++) {
3228                 if (!hba[i]) {
3229                         ctlr_info_t *p;
3230                         p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
3231                         if (!p)
3232                                 goto Enomem;
3233                         p->gendisk[0] = alloc_disk(1 << NWD_SHIFT);
3234                         if (!p->gendisk[0])
3235                                 goto Enomem;
3236                         hba[i] = p;
3237                         return i;
3238                 }
3239         }
3240         printk(KERN_WARNING "cciss: This driver supports a maximum"
3241                " of %d controllers.\n", MAX_CTLR);
3242         return -1;
3243 Enomem:
3244         printk(KERN_ERR "cciss: out of memory.\n");
3245         return -1;
3246 }
3247
3248 static void free_hba(int i)
3249 {
3250         ctlr_info_t *p = hba[i];
3251         int n;
3252
3253         hba[i] = NULL;
3254         for (n = 0; n < CISS_MAX_LUN; n++)
3255                 put_disk(p->gendisk[n]);
3256         kfree(p);
3257 }
3258
3259 /*
3260  *  This is it.  Find all the controllers and register them.  I really hate
3261  *  stealing all these major device numbers.
3262  *  returns the number of block devices registered.
3263  */
3264 static int __devinit cciss_init_one(struct pci_dev *pdev,
3265                                     const struct pci_device_id *ent)
3266 {
3267         int i;
3268         int j = 0;
3269         int rc;
3270         int dac;
3271
3272         i = alloc_cciss_hba();
3273         if (i < 0)
3274                 return -1;
3275
3276         hba[i]->busy_initializing = 1;
3277
3278         if (cciss_pci_init(hba[i], pdev) != 0)
3279                 goto clean1;
3280
3281         sprintf(hba[i]->devname, "cciss%d", i);
3282         hba[i]->ctlr = i;
3283         hba[i]->pdev = pdev;
3284
3285         /* configure PCI DMA stuff */
3286         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK))
3287                 dac = 1;
3288         else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
3289                 dac = 0;
3290         else {
3291                 printk(KERN_ERR "cciss: no suitable DMA available\n");
3292                 goto clean1;
3293         }
3294
3295         /*
3296          * register with the major number, or get a dynamic major number
3297          * by passing 0 as argument.  This is done for greater than
3298          * 8 controller support.
3299          */
3300         if (i < MAX_CTLR_ORIG)
3301                 hba[i]->major = COMPAQ_CISS_MAJOR + i;
3302         rc = register_blkdev(hba[i]->major, hba[i]->devname);
3303         if (rc == -EBUSY || rc == -EINVAL) {
3304                 printk(KERN_ERR
3305                        "cciss:  Unable to get major number %d for %s "
3306                        "on hba %d\n", hba[i]->major, hba[i]->devname, i);
3307                 goto clean1;
3308         } else {
3309                 if (i >= MAX_CTLR_ORIG)
3310                         hba[i]->major = rc;
3311         }
3312
3313         /* make sure the board interrupts are off */
3314         hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
3315         if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
3316                         IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
3317                 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
3318                        hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
3319                 goto clean2;
3320         }
3321
3322         printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
3323                hba[i]->devname, pdev->device, pci_name(pdev),
3324                hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3325
3326         hba[i]->cmd_pool_bits =
3327             kmalloc(((hba[i]->nr_cmds + BITS_PER_LONG -
3328                       1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3329         hba[i]->cmd_pool = (CommandList_struct *)
3330             pci_alloc_consistent(hba[i]->pdev,
3331                     hba[i]->nr_cmds * sizeof(CommandList_struct),
3332                     &(hba[i]->cmd_pool_dhandle));
3333         hba[i]->errinfo_pool = (ErrorInfo_struct *)
3334             pci_alloc_consistent(hba[i]->pdev,
3335                     hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
3336                     &(hba[i]->errinfo_pool_dhandle));
3337         if ((hba[i]->cmd_pool_bits == NULL)
3338             || (hba[i]->cmd_pool == NULL)
3339             || (hba[i]->errinfo_pool == NULL)) {
3340                 printk(KERN_ERR "cciss: out of memory");
3341                 goto clean4;
3342         }
3343 #ifdef CONFIG_CISS_SCSI_TAPE
3344         hba[i]->scsi_rejects.complete =
3345             kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
3346                     (hba[i]->nr_cmds + 5), GFP_KERNEL);
3347         if (hba[i]->scsi_rejects.complete == NULL) {
3348                 printk(KERN_ERR "cciss: out of memory");
3349                 goto clean4;
3350         }
3351 #endif
3352         spin_lock_init(&hba[i]->lock);
3353
3354         /* Initialize the pdev driver private data.
3355            have it point to hba[i].  */
3356         pci_set_drvdata(pdev, hba[i]);
3357         /* command and error info recs zeroed out before
3358            they are used */
3359         memset(hba[i]->cmd_pool_bits, 0,
3360                ((hba[i]->nr_cmds + BITS_PER_LONG -
3361                  1) / BITS_PER_LONG) * sizeof(unsigned long));
3362
3363 #ifdef CCISS_DEBUG
3364         printk(KERN_DEBUG "Scanning for drives on controller cciss%d\n", i);
3365 #endif                          /* CCISS_DEBUG */
3366
3367         cciss_getgeometry(i);
3368
3369         cciss_scsi_setup(i);
3370
3371         /* Turn the interrupts on so we can service requests */
3372         hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
3373
3374         cciss_procinit(i);
3375
3376         hba[i]->cciss_max_sectors = 2048;
3377
3378         hba[i]->busy_initializing = 0;
3379
3380         do {
3381                 drive_info_struct *drv = &(hba[i]->drv[j]);
3382                 struct gendisk *disk = hba[i]->gendisk[j];
3383                 request_queue_t *q;
3384
3385                 /* Check if the disk was allocated already */
3386                 if (!disk){
3387                         hba[i]->gendisk[j] = alloc_disk(1 << NWD_SHIFT);
3388                         disk = hba[i]->gendisk[j];
3389                 }
3390
3391                 /* Check that the disk was able to be allocated */
3392                 if (!disk) {
3393                         printk(KERN_ERR "cciss: unable to allocate memory for disk %d\n", j);
3394                         goto clean4;
3395                 }
3396
3397                 q = blk_init_queue(do_cciss_request, &hba[i]->lock);
3398                 if (!q) {
3399                         printk(KERN_ERR
3400                                "cciss:  unable to allocate queue for disk %d\n",
3401                                j);
3402                         goto clean4;
3403                 }
3404                 drv->queue = q;
3405
3406                 q->backing_dev_info.ra_pages = READ_AHEAD;
3407                 blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask);
3408
3409                 /* This is a hardware imposed limit. */
3410                 blk_queue_max_hw_segments(q, MAXSGENTRIES);
3411
3412                 /* This is a limit in the driver and could be eliminated. */
3413                 blk_queue_max_phys_segments(q, MAXSGENTRIES);
3414
3415                 blk_queue_max_sectors(q, hba[i]->cciss_max_sectors);
3416
3417                 blk_queue_softirq_done(q, cciss_softirq_done);
3418
3419                 q->queuedata = hba[i];
3420                 sprintf(disk->disk_name, "cciss/c%dd%d", i, j);
3421                 disk->major = hba[i]->major;
3422                 disk->first_minor = j << NWD_SHIFT;
3423                 disk->fops = &cciss_fops;
3424                 disk->queue = q;
3425                 disk->private_data = drv;
3426                 disk->driverfs_dev = &pdev->dev;
3427                 /* we must register the controller even if no disks exist */
3428                 /* this is for the online array utilities */
3429                 if (!drv->heads && j)
3430                         continue;
3431                 blk_queue_hardsect_size(q, drv->block_size);
3432                 set_capacity(disk, drv->nr_blocks);
3433                 add_disk(disk);
3434                 j++;
3435         } while (j <= hba[i]->highest_lun);
3436
3437         return 1;
3438
3439       clean4:
3440 #ifdef CONFIG_CISS_SCSI_TAPE
3441         kfree(hba[i]->scsi_rejects.complete);
3442 #endif
3443         kfree(hba[i]->cmd_pool_bits);
3444         if (hba[i]->cmd_pool)
3445                 pci_free_consistent(hba[i]->pdev,
3446                                     hba[i]->nr_cmds * sizeof(CommandList_struct),
3447                                     hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3448         if (hba[i]->errinfo_pool)
3449                 pci_free_consistent(hba[i]->pdev,
3450                                     hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
3451                                     hba[i]->errinfo_pool,
3452                                     hba[i]->errinfo_pool_dhandle);
3453         free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
3454       clean2:
3455         unregister_blkdev(hba[i]->major, hba[i]->devname);
3456       clean1:
3457         hba[i]->busy_initializing = 0;
3458         /* cleanup any queues that may have been initialized */
3459         for (j=0; j <= hba[i]->highest_lun; j++){
3460                 drive_info_struct *drv = &(hba[i]->drv[j]);
3461                 if (drv->queue)
3462                         blk_cleanup_queue(drv->queue);
3463         }
3464         /*
3465          * Deliberately omit pci_disable_device(): it does something nasty to
3466          * Smart Array controllers that pci_enable_device does not undo
3467          */
3468         pci_release_regions(pdev);
3469         pci_set_drvdata(pdev, NULL);
3470         free_hba(i);
3471         return -1;
3472 }
3473
3474 static void cciss_shutdown(struct pci_dev *pdev)
3475 {
3476         ctlr_info_t *tmp_ptr;
3477         int i;
3478         char flush_buf[4];
3479         int return_code;
3480
3481         tmp_ptr = pci_get_drvdata(pdev);
3482         if (tmp_ptr == NULL)
3483                 return;
3484         i = tmp_ptr->ctlr;
3485         if (hba[i] == NULL)
3486                 return;
3487
3488         /* Turn board interrupts off  and send the flush cache command */
3489         /* sendcmd will turn off interrupt, and send the flush...
3490          * To write all data in the battery backed cache to disks */
3491         memset(flush_buf, 0, 4);
3492         return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
3493                               TYPE_CMD);
3494         if (return_code == IO_OK) {
3495                 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
3496         } else {
3497                 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
3498         }
3499         free_irq(hba[i]->intr[2], hba[i]);
3500 }
3501
3502 static void __devexit cciss_remove_one(struct pci_dev *pdev)
3503 {
3504         ctlr_info_t *tmp_ptr;
3505         int i, j;
3506
3507         if (pci_get_drvdata(pdev) == NULL) {
3508                 printk(KERN_ERR "cciss: Unable to remove device \n");
3509                 return;
3510         }
3511         tmp_ptr = pci_get_drvdata(pdev);
3512         i = tmp_ptr->ctlr;
3513         if (hba[i] == NULL) {
3514                 printk(KERN_ERR "cciss: device appears to "
3515                        "already be removed \n");
3516                 return;
3517         }
3518
3519         remove_proc_entry(hba[i]->devname, proc_cciss);
3520         unregister_blkdev(hba[i]->major, hba[i]->devname);
3521
3522         /* remove it from the disk list */
3523         for (j = 0; j < CISS_MAX_LUN; j++) {
3524                 struct gendisk *disk = hba[i]->gendisk[j];
3525                 if (disk) {
3526                         request_queue_t *q = disk->queue;
3527
3528                         if (disk->flags & GENHD_FL_UP)
3529                                 del_gendisk(disk);
3530                         if (q)
3531                                 blk_cleanup_queue(q);
3532                 }
3533         }
3534
3535         cciss_unregister_scsi(i);       /* unhook from SCSI subsystem */
3536
3537         cciss_shutdown(pdev);
3538
3539 #ifdef CONFIG_PCI_MSI
3540         if (hba[i]->msix_vector)
3541                 pci_disable_msix(hba[i]->pdev);
3542         else if (hba[i]->msi_vector)
3543                 pci_disable_msi(hba[i]->pdev);
3544 #endif                          /* CONFIG_PCI_MSI */
3545
3546         iounmap(hba[i]->vaddr);
3547
3548         pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
3549                             hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3550         pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
3551                             hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
3552         kfree(hba[i]->cmd_pool_bits);
3553 #ifdef CONFIG_CISS_SCSI_TAPE
3554         kfree(hba[i]->scsi_rejects.complete);
3555 #endif
3556         /*
3557          * Deliberately omit pci_disable_device(): it does something nasty to
3558          * Smart Array controllers that pci_enable_device does not undo
3559          */
3560         pci_release_regions(pdev);
3561         pci_set_drvdata(pdev, NULL);
3562         free_hba(i);
3563 }
3564
3565 static struct pci_driver cciss_pci_driver = {
3566         .name = "cciss",
3567         .probe = cciss_init_one,
3568         .remove = __devexit_p(cciss_remove_one),
3569         .id_table = cciss_pci_device_id,        /* id_table */
3570         .shutdown = cciss_shutdown,
3571 };
3572
3573 /*
3574  *  This is it.  Register the PCI driver information for the cards we control
3575  *  the OS will call our registered routines when it finds one of our cards.
3576  */
3577 static int __init cciss_init(void)
3578 {
3579         printk(KERN_INFO DRIVER_NAME "\n");
3580
3581         /* Register for our PCI devices */
3582         return pci_register_driver(&cciss_pci_driver);
3583 }
3584
3585 static void __exit cciss_cleanup(void)
3586 {
3587         int i;
3588
3589         pci_unregister_driver(&cciss_pci_driver);
3590         /* double check that all controller entrys have been removed */
3591         for (i = 0; i < MAX_CTLR; i++) {
3592                 if (hba[i] != NULL) {
3593                         printk(KERN_WARNING "cciss: had to remove"
3594                                " controller %d\n", i);
3595                         cciss_remove_one(hba[i]->pdev);
3596                 }
3597         }
3598         remove_proc_entry("cciss", proc_root_driver);
3599 }
3600
3601 static void fail_all_cmds(unsigned long ctlr)
3602 {
3603         /* If we get here, the board is apparently dead. */
3604         ctlr_info_t *h = hba[ctlr];
3605         CommandList_struct *c;
3606         unsigned long flags;
3607
3608         printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
3609         h->alive = 0;           /* the controller apparently died... */
3610
3611         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
3612
3613         pci_disable_device(h->pdev);    /* Make sure it is really dead. */
3614
3615         /* move everything off the request queue onto the completed queue */
3616         while ((c = h->reqQ) != NULL) {
3617                 removeQ(&(h->reqQ), c);
3618                 h->Qdepth--;
3619                 addQ(&(h->cmpQ), c);
3620         }
3621
3622         /* Now, fail everything on the completed queue with a HW error */
3623         while ((c = h->cmpQ) != NULL) {
3624                 removeQ(&h->cmpQ, c);
3625                 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
3626                 if (c->cmd_type == CMD_RWREQ) {
3627                         complete_command(h, c, 0);
3628                 } else if (c->cmd_type == CMD_IOCTL_PEND)
3629                         complete(c->waiting);
3630 #ifdef CONFIG_CISS_SCSI_TAPE
3631                 else if (c->cmd_type == CMD_SCSI)
3632                         complete_scsi_command(c, 0, 0);
3633 #endif
3634         }
3635         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
3636         return;
3637 }
3638
3639 module_init(cciss_init);
3640 module_exit(cciss_cleanup);