[PATCH] switch scsi_cmd_ioctl() to passing fmode_t
[kernel.git] / drivers / block / cciss.c
1 /*
2  *    Disk Array driver for HP Smart Array controllers.
3  *    (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
4  *
5  *    This program is free software; you can redistribute it and/or modify
6  *    it under the terms of the GNU General Public License as published by
7  *    the Free Software Foundation; version 2 of the License.
8  *
9  *    This program is distributed in the hope that it will be useful,
10  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  *    General Public License for more details.
13  *
14  *    You should have received a copy of the GNU General Public License
15  *    along with this program; if not, write to the Free Software
16  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17  *    02111-1307, USA.
18  *
19  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
20  *
21  */
22
23 #include <linux/module.h>
24 #include <linux/interrupt.h>
25 #include <linux/types.h>
26 #include <linux/pci.h>
27 #include <linux/kernel.h>
28 #include <linux/slab.h>
29 #include <linux/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/seq_file.h>
37 #include <linux/init.h>
38 #include <linux/hdreg.h>
39 #include <linux/spinlock.h>
40 #include <linux/compat.h>
41 #include <linux/blktrace_api.h>
42 #include <asm/uaccess.h>
43 #include <asm/io.h>
44
45 #include <linux/dma-mapping.h>
46 #include <linux/blkdev.h>
47 #include <linux/genhd.h>
48 #include <linux/completion.h>
49 #include <scsi/scsi.h>
50 #include <scsi/sg.h>
51 #include <scsi/scsi_ioctl.h>
52 #include <linux/cdrom.h>
53 #include <linux/scatterlist.h>
54
55 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
56 #define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
57 #define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
58
59 /* Embedded module documentation macros - see modules.h */
60 MODULE_AUTHOR("Hewlett-Packard Company");
61 MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
62 MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
63                         " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
64                         " Smart Array G2 Series SAS/SATA Controllers");
65 MODULE_VERSION("3.6.20");
66 MODULE_LICENSE("GPL");
67
68 #include "cciss_cmd.h"
69 #include "cciss.h"
70 #include <linux/cciss_ioctl.h>
71
72 /* define the PCI info for the cards we can control */
73 static const struct pci_device_id cciss_pci_device_id[] = {
74         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS,  0x0E11, 0x4070},
75         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
76         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
77         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
78         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
79         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
80         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
81         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
82         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
83         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSA,     0x103C, 0x3225},
84         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3223},
85         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3234},
86         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3235},
87         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3211},
88         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3212},
89         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3213},
90         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3214},
91         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3215},
92         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3237},
93         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x323D},
94         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
95         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
96         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
97         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
98         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
99         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
100                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
101         {0,}
102 };
103
104 MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
105
106 /*  board_id = Subsystem Device ID & Vendor ID
107  *  product = Marketing Name for the board
108  *  access = Address of the struct of function pointers
109  */
110 static struct board_type products[] = {
111         {0x40700E11, "Smart Array 5300", &SA5_access},
112         {0x40800E11, "Smart Array 5i", &SA5B_access},
113         {0x40820E11, "Smart Array 532", &SA5B_access},
114         {0x40830E11, "Smart Array 5312", &SA5B_access},
115         {0x409A0E11, "Smart Array 641", &SA5_access},
116         {0x409B0E11, "Smart Array 642", &SA5_access},
117         {0x409C0E11, "Smart Array 6400", &SA5_access},
118         {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
119         {0x40910E11, "Smart Array 6i", &SA5_access},
120         {0x3225103C, "Smart Array P600", &SA5_access},
121         {0x3223103C, "Smart Array P800", &SA5_access},
122         {0x3234103C, "Smart Array P400", &SA5_access},
123         {0x3235103C, "Smart Array P400i", &SA5_access},
124         {0x3211103C, "Smart Array E200i", &SA5_access},
125         {0x3212103C, "Smart Array E200", &SA5_access},
126         {0x3213103C, "Smart Array E200i", &SA5_access},
127         {0x3214103C, "Smart Array E200i", &SA5_access},
128         {0x3215103C, "Smart Array E200i", &SA5_access},
129         {0x3237103C, "Smart Array E500", &SA5_access},
130         {0x323D103C, "Smart Array P700m", &SA5_access},
131         {0x3241103C, "Smart Array P212", &SA5_access},
132         {0x3243103C, "Smart Array P410", &SA5_access},
133         {0x3245103C, "Smart Array P410i", &SA5_access},
134         {0x3247103C, "Smart Array P411", &SA5_access},
135         {0x3249103C, "Smart Array P812", &SA5_access},
136         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
137 };
138
139 /* How long to wait (in milliseconds) for board to go into simple mode */
140 #define MAX_CONFIG_WAIT 30000
141 #define MAX_IOCTL_CONFIG_WAIT 1000
142
143 /*define how many times we will try a command because of bus resets */
144 #define MAX_CMD_RETRIES 3
145
146 #define MAX_CTLR        32
147
148 /* Originally cciss driver only supports 8 major numbers */
149 #define MAX_CTLR_ORIG   8
150
151 static ctlr_info_t *hba[MAX_CTLR];
152
153 static void do_cciss_request(struct request_queue *q);
154 static irqreturn_t do_cciss_intr(int irq, void *dev_id);
155 static int cciss_open(struct inode *inode, struct file *filep);
156 static int cciss_release(struct inode *inode, struct file *filep);
157 static int cciss_ioctl(struct inode *inode, struct file *filep,
158                        unsigned int cmd, unsigned long arg);
159 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
160
161 static int cciss_revalidate(struct gendisk *disk);
162 static int rebuild_lun_table(ctlr_info_t *h, int first_time);
163 static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
164                            int clear_all);
165
166 static void cciss_read_capacity(int ctlr, int logvol, int withirq,
167                         sector_t *total_size, unsigned int *block_size);
168 static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
169                         sector_t *total_size, unsigned int *block_size);
170 static void cciss_geometry_inquiry(int ctlr, int logvol,
171                         int withirq, sector_t total_size,
172                         unsigned int block_size, InquiryData_struct *inq_buff,
173                                    drive_info_struct *drv);
174 static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
175                                            __u32);
176 static void start_io(ctlr_info_t *h);
177 static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
178                    unsigned int use_unit_num, unsigned int log_unit,
179                    __u8 page_code, unsigned char *scsi3addr, int cmd_type);
180 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
181                            unsigned int use_unit_num, unsigned int log_unit,
182                            __u8 page_code, int cmd_type);
183
184 static void fail_all_cmds(unsigned long ctlr);
185
186 #ifdef CONFIG_PROC_FS
187 static void cciss_procinit(int i);
188 #else
189 static void cciss_procinit(int i)
190 {
191 }
192 #endif                          /* CONFIG_PROC_FS */
193
194 #ifdef CONFIG_COMPAT
195 static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
196 #endif
197
198 static struct block_device_operations cciss_fops = {
199         .owner = THIS_MODULE,
200         .open = cciss_open,
201         .release = cciss_release,
202         .ioctl = cciss_ioctl,
203         .getgeo = cciss_getgeo,
204 #ifdef CONFIG_COMPAT
205         .compat_ioctl = cciss_compat_ioctl,
206 #endif
207         .revalidate_disk = cciss_revalidate,
208 };
209
210 /*
211  * Enqueuing and dequeuing functions for cmdlists.
212  */
213 static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c)
214 {
215         if (*Qptr == NULL) {
216                 *Qptr = c;
217                 c->next = c->prev = c;
218         } else {
219                 c->prev = (*Qptr)->prev;
220                 c->next = (*Qptr);
221                 (*Qptr)->prev->next = c;
222                 (*Qptr)->prev = c;
223         }
224 }
225
226 static inline CommandList_struct *removeQ(CommandList_struct **Qptr,
227                                           CommandList_struct *c)
228 {
229         if (c && c->next != c) {
230                 if (*Qptr == c)
231                         *Qptr = c->next;
232                 c->prev->next = c->next;
233                 c->next->prev = c->prev;
234         } else {
235                 *Qptr = NULL;
236         }
237         return c;
238 }
239
240 #include "cciss_scsi.c"         /* For SCSI tape support */
241
242 #define RAID_UNKNOWN 6
243
244 #ifdef CONFIG_PROC_FS
245
246 /*
247  * Report information about this controller.
248  */
249 #define ENG_GIG 1000000000
250 #define ENG_GIG_FACTOR (ENG_GIG/512)
251 #define ENGAGE_SCSI     "engage scsi"
252 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
253         "UNKNOWN"
254 };
255
256 static struct proc_dir_entry *proc_cciss;
257
258 static void cciss_seq_show_header(struct seq_file *seq)
259 {
260         ctlr_info_t *h = seq->private;
261
262         seq_printf(seq, "%s: HP %s Controller\n"
263                 "Board ID: 0x%08lx\n"
264                 "Firmware Version: %c%c%c%c\n"
265                 "IRQ: %d\n"
266                 "Logical drives: %d\n"
267                 "Current Q depth: %d\n"
268                 "Current # commands on controller: %d\n"
269                 "Max Q depth since init: %d\n"
270                 "Max # commands on controller since init: %d\n"
271                 "Max SG entries since init: %d\n",
272                 h->devname,
273                 h->product_name,
274                 (unsigned long)h->board_id,
275                 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
276                 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
277                 h->num_luns,
278                 h->Qdepth, h->commands_outstanding,
279                 h->maxQsinceinit, h->max_outstanding, h->maxSG);
280
281 #ifdef CONFIG_CISS_SCSI_TAPE
282         cciss_seq_tape_report(seq, h->ctlr);
283 #endif /* CONFIG_CISS_SCSI_TAPE */
284 }
285
286 static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
287 {
288         ctlr_info_t *h = seq->private;
289         unsigned ctlr = h->ctlr;
290         unsigned long flags;
291
292         /* prevent displaying bogus info during configuration
293          * or deconfiguration of a logical volume
294          */
295         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
296         if (h->busy_configuring) {
297                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
298                 return ERR_PTR(-EBUSY);
299         }
300         h->busy_configuring = 1;
301         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
302
303         if (*pos == 0)
304                 cciss_seq_show_header(seq);
305
306         return pos;
307 }
308
309 static int cciss_seq_show(struct seq_file *seq, void *v)
310 {
311         sector_t vol_sz, vol_sz_frac;
312         ctlr_info_t *h = seq->private;
313         unsigned ctlr = h->ctlr;
314         loff_t *pos = v;
315         drive_info_struct *drv = &h->drv[*pos];
316
317         if (*pos > h->highest_lun)
318                 return 0;
319
320         if (drv->heads == 0)
321                 return 0;
322
323         vol_sz = drv->nr_blocks;
324         vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
325         vol_sz_frac *= 100;
326         sector_div(vol_sz_frac, ENG_GIG_FACTOR);
327
328         if (drv->raid_level > 5)
329                 drv->raid_level = RAID_UNKNOWN;
330         seq_printf(seq, "cciss/c%dd%d:"
331                         "\t%4u.%02uGB\tRAID %s\n",
332                         ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
333                         raid_label[drv->raid_level]);
334         return 0;
335 }
336
337 static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
338 {
339         ctlr_info_t *h = seq->private;
340
341         if (*pos > h->highest_lun)
342                 return NULL;
343         *pos += 1;
344
345         return pos;
346 }
347
348 static void cciss_seq_stop(struct seq_file *seq, void *v)
349 {
350         ctlr_info_t *h = seq->private;
351
352         /* Only reset h->busy_configuring if we succeeded in setting
353          * it during cciss_seq_start. */
354         if (v == ERR_PTR(-EBUSY))
355                 return;
356
357         h->busy_configuring = 0;
358 }
359
360 static struct seq_operations cciss_seq_ops = {
361         .start = cciss_seq_start,
362         .show  = cciss_seq_show,
363         .next  = cciss_seq_next,
364         .stop  = cciss_seq_stop,
365 };
366
367 static int cciss_seq_open(struct inode *inode, struct file *file)
368 {
369         int ret = seq_open(file, &cciss_seq_ops);
370         struct seq_file *seq = file->private_data;
371
372         if (!ret)
373                 seq->private = PDE(inode)->data;
374
375         return ret;
376 }
377
378 static ssize_t
379 cciss_proc_write(struct file *file, const char __user *buf,
380                  size_t length, loff_t *ppos)
381 {
382         int err;
383         char *buffer;
384
385 #ifndef CONFIG_CISS_SCSI_TAPE
386         return -EINVAL;
387 #endif
388
389         if (!buf || length > PAGE_SIZE - 1)
390                 return -EINVAL;
391
392         buffer = (char *)__get_free_page(GFP_KERNEL);
393         if (!buffer)
394                 return -ENOMEM;
395
396         err = -EFAULT;
397         if (copy_from_user(buffer, buf, length))
398                 goto out;
399         buffer[length] = '\0';
400
401 #ifdef CONFIG_CISS_SCSI_TAPE
402         if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
403                 struct seq_file *seq = file->private_data;
404                 ctlr_info_t *h = seq->private;
405                 int rc;
406
407                 rc = cciss_engage_scsi(h->ctlr);
408                 if (rc != 0)
409                         err = -rc;
410                 else
411                         err = length;
412         } else
413 #endif /* CONFIG_CISS_SCSI_TAPE */
414                 err = -EINVAL;
415         /* might be nice to have "disengage" too, but it's not
416            safely possible. (only 1 module use count, lock issues.) */
417
418 out:
419         free_page((unsigned long)buffer);
420         return err;
421 }
422
423 static struct file_operations cciss_proc_fops = {
424         .owner   = THIS_MODULE,
425         .open    = cciss_seq_open,
426         .read    = seq_read,
427         .llseek  = seq_lseek,
428         .release = seq_release,
429         .write   = cciss_proc_write,
430 };
431
432 static void __devinit cciss_procinit(int i)
433 {
434         struct proc_dir_entry *pde;
435
436         if (proc_cciss == NULL)
437                 proc_cciss = proc_mkdir("driver/cciss", NULL);
438         if (!proc_cciss)
439                 return;
440         pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
441                                         S_IROTH, proc_cciss,
442                                         &cciss_proc_fops, hba[i]);
443 }
444 #endif                          /* CONFIG_PROC_FS */
445
446 /*
447  * For operations that cannot sleep, a command block is allocated at init,
448  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
449  * which ones are free or in use.  For operations that can wait for kmalloc
450  * to possible sleep, this routine can be called with get_from_pool set to 0.
451  * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
452  */
453 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
454 {
455         CommandList_struct *c;
456         int i;
457         u64bit temp64;
458         dma_addr_t cmd_dma_handle, err_dma_handle;
459
460         if (!get_from_pool) {
461                 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
462                         sizeof(CommandList_struct), &cmd_dma_handle);
463                 if (c == NULL)
464                         return NULL;
465                 memset(c, 0, sizeof(CommandList_struct));
466
467                 c->cmdindex = -1;
468
469                 c->err_info = (ErrorInfo_struct *)
470                     pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
471                             &err_dma_handle);
472
473                 if (c->err_info == NULL) {
474                         pci_free_consistent(h->pdev,
475                                 sizeof(CommandList_struct), c, cmd_dma_handle);
476                         return NULL;
477                 }
478                 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
479         } else {                /* get it out of the controllers pool */
480
481                 do {
482                         i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
483                         if (i == h->nr_cmds)
484                                 return NULL;
485                 } while (test_and_set_bit
486                          (i & (BITS_PER_LONG - 1),
487                           h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
488 #ifdef CCISS_DEBUG
489                 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
490 #endif
491                 c = h->cmd_pool + i;
492                 memset(c, 0, sizeof(CommandList_struct));
493                 cmd_dma_handle = h->cmd_pool_dhandle
494                     + i * sizeof(CommandList_struct);
495                 c->err_info = h->errinfo_pool + i;
496                 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
497                 err_dma_handle = h->errinfo_pool_dhandle
498                     + i * sizeof(ErrorInfo_struct);
499                 h->nr_allocs++;
500
501                 c->cmdindex = i;
502         }
503
504         c->busaddr = (__u32) cmd_dma_handle;
505         temp64.val = (__u64) err_dma_handle;
506         c->ErrDesc.Addr.lower = temp64.val32.lower;
507         c->ErrDesc.Addr.upper = temp64.val32.upper;
508         c->ErrDesc.Len = sizeof(ErrorInfo_struct);
509
510         c->ctlr = h->ctlr;
511         return c;
512 }
513
514 /*
515  * Frees a command block that was previously allocated with cmd_alloc().
516  */
517 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
518 {
519         int i;
520         u64bit temp64;
521
522         if (!got_from_pool) {
523                 temp64.val32.lower = c->ErrDesc.Addr.lower;
524                 temp64.val32.upper = c->ErrDesc.Addr.upper;
525                 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
526                                     c->err_info, (dma_addr_t) temp64.val);
527                 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
528                                     c, (dma_addr_t) c->busaddr);
529         } else {
530                 i = c - h->cmd_pool;
531                 clear_bit(i & (BITS_PER_LONG - 1),
532                           h->cmd_pool_bits + (i / BITS_PER_LONG));
533                 h->nr_frees++;
534         }
535 }
536
537 static inline ctlr_info_t *get_host(struct gendisk *disk)
538 {
539         return disk->queue->queuedata;
540 }
541
542 static inline drive_info_struct *get_drv(struct gendisk *disk)
543 {
544         return disk->private_data;
545 }
546
547 /*
548  * Open.  Make sure the device is really there.
549  */
550 static int cciss_open(struct inode *inode, struct file *filep)
551 {
552         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
553         drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);
554
555 #ifdef CCISS_DEBUG
556         printk(KERN_DEBUG "cciss_open %s\n", inode->i_bdev->bd_disk->disk_name);
557 #endif                          /* CCISS_DEBUG */
558
559         if (host->busy_initializing || drv->busy_configuring)
560                 return -EBUSY;
561         /*
562          * Root is allowed to open raw volume zero even if it's not configured
563          * so array config can still work. Root is also allowed to open any
564          * volume that has a LUN ID, so it can issue IOCTL to reread the
565          * disk information.  I don't think I really like this
566          * but I'm already using way to many device nodes to claim another one
567          * for "raw controller".
568          */
569         if (drv->heads == 0) {
570                 if (iminor(inode) != 0) {       /* not node 0? */
571                         /* if not node 0 make sure it is a partition = 0 */
572                         if (iminor(inode) & 0x0f) {
573                                 return -ENXIO;
574                                 /* if it is, make sure we have a LUN ID */
575                         } else if (drv->LunID == 0) {
576                                 return -ENXIO;
577                         }
578                 }
579                 if (!capable(CAP_SYS_ADMIN))
580                         return -EPERM;
581         }
582         drv->usage_count++;
583         host->usage_count++;
584         return 0;
585 }
586
587 /*
588  * Close.  Sync first.
589  */
590 static int cciss_release(struct inode *inode, struct file *filep)
591 {
592         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
593         drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);
594
595 #ifdef CCISS_DEBUG
596         printk(KERN_DEBUG "cciss_release %s\n",
597                inode->i_bdev->bd_disk->disk_name);
598 #endif                          /* CCISS_DEBUG */
599
600         drv->usage_count--;
601         host->usage_count--;
602         return 0;
603 }
604
605 #ifdef CONFIG_COMPAT
606
607 static int do_ioctl(struct file *f, unsigned cmd, unsigned long arg)
608 {
609         int ret;
610         lock_kernel();
611         ret = cciss_ioctl(f->f_path.dentry->d_inode, f, cmd, arg);
612         unlock_kernel();
613         return ret;
614 }
615
616 static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
617                                   unsigned long arg);
618 static int cciss_ioctl32_big_passthru(struct file *f, unsigned cmd,
619                                       unsigned long arg);
620
621 static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
622 {
623         switch (cmd) {
624         case CCISS_GETPCIINFO:
625         case CCISS_GETINTINFO:
626         case CCISS_SETINTINFO:
627         case CCISS_GETNODENAME:
628         case CCISS_SETNODENAME:
629         case CCISS_GETHEARTBEAT:
630         case CCISS_GETBUSTYPES:
631         case CCISS_GETFIRMVER:
632         case CCISS_GETDRIVVER:
633         case CCISS_REVALIDVOLS:
634         case CCISS_DEREGDISK:
635         case CCISS_REGNEWDISK:
636         case CCISS_REGNEWD:
637         case CCISS_RESCANDISK:
638         case CCISS_GETLUNINFO:
639                 return do_ioctl(f, cmd, arg);
640
641         case CCISS_PASSTHRU32:
642                 return cciss_ioctl32_passthru(f, cmd, arg);
643         case CCISS_BIG_PASSTHRU32:
644                 return cciss_ioctl32_big_passthru(f, cmd, arg);
645
646         default:
647                 return -ENOIOCTLCMD;
648         }
649 }
650
651 static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
652                                   unsigned long arg)
653 {
654         IOCTL32_Command_struct __user *arg32 =
655             (IOCTL32_Command_struct __user *) arg;
656         IOCTL_Command_struct arg64;
657         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
658         int err;
659         u32 cp;
660
661         err = 0;
662         err |=
663             copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
664                            sizeof(arg64.LUN_info));
665         err |=
666             copy_from_user(&arg64.Request, &arg32->Request,
667                            sizeof(arg64.Request));
668         err |=
669             copy_from_user(&arg64.error_info, &arg32->error_info,
670                            sizeof(arg64.error_info));
671         err |= get_user(arg64.buf_size, &arg32->buf_size);
672         err |= get_user(cp, &arg32->buf);
673         arg64.buf = compat_ptr(cp);
674         err |= copy_to_user(p, &arg64, sizeof(arg64));
675
676         if (err)
677                 return -EFAULT;
678
679         err = do_ioctl(f, CCISS_PASSTHRU, (unsigned long)p);
680         if (err)
681                 return err;
682         err |=
683             copy_in_user(&arg32->error_info, &p->error_info,
684                          sizeof(arg32->error_info));
685         if (err)
686                 return -EFAULT;
687         return err;
688 }
689
690 static int cciss_ioctl32_big_passthru(struct file *file, unsigned cmd,
691                                       unsigned long arg)
692 {
693         BIG_IOCTL32_Command_struct __user *arg32 =
694             (BIG_IOCTL32_Command_struct __user *) arg;
695         BIG_IOCTL_Command_struct arg64;
696         BIG_IOCTL_Command_struct __user *p =
697             compat_alloc_user_space(sizeof(arg64));
698         int err;
699         u32 cp;
700
701         err = 0;
702         err |=
703             copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
704                            sizeof(arg64.LUN_info));
705         err |=
706             copy_from_user(&arg64.Request, &arg32->Request,
707                            sizeof(arg64.Request));
708         err |=
709             copy_from_user(&arg64.error_info, &arg32->error_info,
710                            sizeof(arg64.error_info));
711         err |= get_user(arg64.buf_size, &arg32->buf_size);
712         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
713         err |= get_user(cp, &arg32->buf);
714         arg64.buf = compat_ptr(cp);
715         err |= copy_to_user(p, &arg64, sizeof(arg64));
716
717         if (err)
718                 return -EFAULT;
719
720         err = do_ioctl(file, CCISS_BIG_PASSTHRU, (unsigned long)p);
721         if (err)
722                 return err;
723         err |=
724             copy_in_user(&arg32->error_info, &p->error_info,
725                          sizeof(arg32->error_info));
726         if (err)
727                 return -EFAULT;
728         return err;
729 }
730 #endif
731
732 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
733 {
734         drive_info_struct *drv = get_drv(bdev->bd_disk);
735
736         if (!drv->cylinders)
737                 return -ENXIO;
738
739         geo->heads = drv->heads;
740         geo->sectors = drv->sectors;
741         geo->cylinders = drv->cylinders;
742         return 0;
743 }
744
745 /*
746  * ioctl
747  */
748 static int cciss_ioctl(struct inode *inode, struct file *filep,
749                        unsigned int cmd, unsigned long arg)
750 {
751         struct block_device *bdev = inode->i_bdev;
752         struct gendisk *disk = bdev->bd_disk;
753         ctlr_info_t *host = get_host(disk);
754         drive_info_struct *drv = get_drv(disk);
755         int ctlr = host->ctlr;
756         void __user *argp = (void __user *)arg;
757
758 #ifdef CCISS_DEBUG
759         printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
760 #endif                          /* CCISS_DEBUG */
761
762         switch (cmd) {
763         case CCISS_GETPCIINFO:
764                 {
765                         cciss_pci_info_struct pciinfo;
766
767                         if (!arg)
768                                 return -EINVAL;
769                         pciinfo.domain = pci_domain_nr(host->pdev->bus);
770                         pciinfo.bus = host->pdev->bus->number;
771                         pciinfo.dev_fn = host->pdev->devfn;
772                         pciinfo.board_id = host->board_id;
773                         if (copy_to_user
774                             (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
775                                 return -EFAULT;
776                         return 0;
777                 }
778         case CCISS_GETINTINFO:
779                 {
780                         cciss_coalint_struct intinfo;
781                         if (!arg)
782                                 return -EINVAL;
783                         intinfo.delay =
784                             readl(&host->cfgtable->HostWrite.CoalIntDelay);
785                         intinfo.count =
786                             readl(&host->cfgtable->HostWrite.CoalIntCount);
787                         if (copy_to_user
788                             (argp, &intinfo, sizeof(cciss_coalint_struct)))
789                                 return -EFAULT;
790                         return 0;
791                 }
792         case CCISS_SETINTINFO:
793                 {
794                         cciss_coalint_struct intinfo;
795                         unsigned long flags;
796                         int i;
797
798                         if (!arg)
799                                 return -EINVAL;
800                         if (!capable(CAP_SYS_ADMIN))
801                                 return -EPERM;
802                         if (copy_from_user
803                             (&intinfo, argp, sizeof(cciss_coalint_struct)))
804                                 return -EFAULT;
805                         if ((intinfo.delay == 0) && (intinfo.count == 0))
806                         {
807 //                      printk("cciss_ioctl: delay and count cannot be 0\n");
808                                 return -EINVAL;
809                         }
810                         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
811                         /* Update the field, and then ring the doorbell */
812                         writel(intinfo.delay,
813                                &(host->cfgtable->HostWrite.CoalIntDelay));
814                         writel(intinfo.count,
815                                &(host->cfgtable->HostWrite.CoalIntCount));
816                         writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
817
818                         for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
819                                 if (!(readl(host->vaddr + SA5_DOORBELL)
820                                       & CFGTBL_ChangeReq))
821                                         break;
822                                 /* delay and try again */
823                                 udelay(1000);
824                         }
825                         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
826                         if (i >= MAX_IOCTL_CONFIG_WAIT)
827                                 return -EAGAIN;
828                         return 0;
829                 }
830         case CCISS_GETNODENAME:
831                 {
832                         NodeName_type NodeName;
833                         int i;
834
835                         if (!arg)
836                                 return -EINVAL;
837                         for (i = 0; i < 16; i++)
838                                 NodeName[i] =
839                                     readb(&host->cfgtable->ServerName[i]);
840                         if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
841                                 return -EFAULT;
842                         return 0;
843                 }
844         case CCISS_SETNODENAME:
845                 {
846                         NodeName_type NodeName;
847                         unsigned long flags;
848                         int i;
849
850                         if (!arg)
851                                 return -EINVAL;
852                         if (!capable(CAP_SYS_ADMIN))
853                                 return -EPERM;
854
855                         if (copy_from_user
856                             (NodeName, argp, sizeof(NodeName_type)))
857                                 return -EFAULT;
858
859                         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
860
861                         /* Update the field, and then ring the doorbell */
862                         for (i = 0; i < 16; i++)
863                                 writeb(NodeName[i],
864                                        &host->cfgtable->ServerName[i]);
865
866                         writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
867
868                         for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
869                                 if (!(readl(host->vaddr + SA5_DOORBELL)
870                                       & CFGTBL_ChangeReq))
871                                         break;
872                                 /* delay and try again */
873                                 udelay(1000);
874                         }
875                         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
876                         if (i >= MAX_IOCTL_CONFIG_WAIT)
877                                 return -EAGAIN;
878                         return 0;
879                 }
880
881         case CCISS_GETHEARTBEAT:
882                 {
883                         Heartbeat_type heartbeat;
884
885                         if (!arg)
886                                 return -EINVAL;
887                         heartbeat = readl(&host->cfgtable->HeartBeat);
888                         if (copy_to_user
889                             (argp, &heartbeat, sizeof(Heartbeat_type)))
890                                 return -EFAULT;
891                         return 0;
892                 }
893         case CCISS_GETBUSTYPES:
894                 {
895                         BusTypes_type BusTypes;
896
897                         if (!arg)
898                                 return -EINVAL;
899                         BusTypes = readl(&host->cfgtable->BusTypes);
900                         if (copy_to_user
901                             (argp, &BusTypes, sizeof(BusTypes_type)))
902                                 return -EFAULT;
903                         return 0;
904                 }
905         case CCISS_GETFIRMVER:
906                 {
907                         FirmwareVer_type firmware;
908
909                         if (!arg)
910                                 return -EINVAL;
911                         memcpy(firmware, host->firm_ver, 4);
912
913                         if (copy_to_user
914                             (argp, firmware, sizeof(FirmwareVer_type)))
915                                 return -EFAULT;
916                         return 0;
917                 }
918         case CCISS_GETDRIVVER:
919                 {
920                         DriverVer_type DriverVer = DRIVER_VERSION;
921
922                         if (!arg)
923                                 return -EINVAL;
924
925                         if (copy_to_user
926                             (argp, &DriverVer, sizeof(DriverVer_type)))
927                                 return -EFAULT;
928                         return 0;
929                 }
930
931         case CCISS_DEREGDISK:
932         case CCISS_REGNEWD:
933         case CCISS_REVALIDVOLS:
934                 return rebuild_lun_table(host, 0);
935
936         case CCISS_GETLUNINFO:{
937                         LogvolInfo_struct luninfo;
938
939                         luninfo.LunID = drv->LunID;
940                         luninfo.num_opens = drv->usage_count;
941                         luninfo.num_parts = 0;
942                         if (copy_to_user(argp, &luninfo,
943                                          sizeof(LogvolInfo_struct)))
944                                 return -EFAULT;
945                         return 0;
946                 }
947         case CCISS_PASSTHRU:
948                 {
949                         IOCTL_Command_struct iocommand;
950                         CommandList_struct *c;
951                         char *buff = NULL;
952                         u64bit temp64;
953                         unsigned long flags;
954                         DECLARE_COMPLETION_ONSTACK(wait);
955
956                         if (!arg)
957                                 return -EINVAL;
958
959                         if (!capable(CAP_SYS_RAWIO))
960                                 return -EPERM;
961
962                         if (copy_from_user
963                             (&iocommand, argp, sizeof(IOCTL_Command_struct)))
964                                 return -EFAULT;
965                         if ((iocommand.buf_size < 1) &&
966                             (iocommand.Request.Type.Direction != XFER_NONE)) {
967                                 return -EINVAL;
968                         }
969 #if 0                           /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
970                         /* Check kmalloc limits */
971                         if (iocommand.buf_size > 128000)
972                                 return -EINVAL;
973 #endif
974                         if (iocommand.buf_size > 0) {
975                                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
976                                 if (buff == NULL)
977                                         return -EFAULT;
978                         }
979                         if (iocommand.Request.Type.Direction == XFER_WRITE) {
980                                 /* Copy the data into the buffer we created */
981                                 if (copy_from_user
982                                     (buff, iocommand.buf, iocommand.buf_size)) {
983                                         kfree(buff);
984                                         return -EFAULT;
985                                 }
986                         } else {
987                                 memset(buff, 0, iocommand.buf_size);
988                         }
989                         if ((c = cmd_alloc(host, 0)) == NULL) {
990                                 kfree(buff);
991                                 return -ENOMEM;
992                         }
993                         // Fill in the command type
994                         c->cmd_type = CMD_IOCTL_PEND;
995                         // Fill in Command Header
996                         c->Header.ReplyQueue = 0;       // unused in simple mode
997                         if (iocommand.buf_size > 0)     // buffer to fill
998                         {
999                                 c->Header.SGList = 1;
1000                                 c->Header.SGTotal = 1;
1001                         } else  // no buffers to fill
1002                         {
1003                                 c->Header.SGList = 0;
1004                                 c->Header.SGTotal = 0;
1005                         }
1006                         c->Header.LUN = iocommand.LUN_info;
1007                         c->Header.Tag.lower = c->busaddr;       // use the kernel address the cmd block for tag
1008
1009                         // Fill in Request block
1010                         c->Request = iocommand.Request;
1011
1012                         // Fill in the scatter gather information
1013                         if (iocommand.buf_size > 0) {
1014                                 temp64.val = pci_map_single(host->pdev, buff,
1015                                         iocommand.buf_size,
1016                                         PCI_DMA_BIDIRECTIONAL);
1017                                 c->SG[0].Addr.lower = temp64.val32.lower;
1018                                 c->SG[0].Addr.upper = temp64.val32.upper;
1019                                 c->SG[0].Len = iocommand.buf_size;
1020                                 c->SG[0].Ext = 0;       // we are not chaining
1021                         }
1022                         c->waiting = &wait;
1023
1024                         /* Put the request on the tail of the request queue */
1025                         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1026                         addQ(&host->reqQ, c);
1027                         host->Qdepth++;
1028                         start_io(host);
1029                         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1030
1031                         wait_for_completion(&wait);
1032
1033                         /* unlock the buffers from DMA */
1034                         temp64.val32.lower = c->SG[0].Addr.lower;
1035                         temp64.val32.upper = c->SG[0].Addr.upper;
1036                         pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1037                                          iocommand.buf_size,
1038                                          PCI_DMA_BIDIRECTIONAL);
1039
1040                         /* Copy the error information out */
1041                         iocommand.error_info = *(c->err_info);
1042                         if (copy_to_user
1043                             (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1044                                 kfree(buff);
1045                                 cmd_free(host, c, 0);
1046                                 return -EFAULT;
1047                         }
1048
1049                         if (iocommand.Request.Type.Direction == XFER_READ) {
1050                                 /* Copy the data out of the buffer we created */
1051                                 if (copy_to_user
1052                                     (iocommand.buf, buff, iocommand.buf_size)) {
1053                                         kfree(buff);
1054                                         cmd_free(host, c, 0);
1055                                         return -EFAULT;
1056                                 }
1057                         }
1058                         kfree(buff);
1059                         cmd_free(host, c, 0);
1060                         return 0;
1061                 }
1062         case CCISS_BIG_PASSTHRU:{
1063                         BIG_IOCTL_Command_struct *ioc;
1064                         CommandList_struct *c;
1065                         unsigned char **buff = NULL;
1066                         int *buff_size = NULL;
1067                         u64bit temp64;
1068                         unsigned long flags;
1069                         BYTE sg_used = 0;
1070                         int status = 0;
1071                         int i;
1072                         DECLARE_COMPLETION_ONSTACK(wait);
1073                         __u32 left;
1074                         __u32 sz;
1075                         BYTE __user *data_ptr;
1076
1077                         if (!arg)
1078                                 return -EINVAL;
1079                         if (!capable(CAP_SYS_RAWIO))
1080                                 return -EPERM;
1081                         ioc = (BIG_IOCTL_Command_struct *)
1082                             kmalloc(sizeof(*ioc), GFP_KERNEL);
1083                         if (!ioc) {
1084                                 status = -ENOMEM;
1085                                 goto cleanup1;
1086                         }
1087                         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1088                                 status = -EFAULT;
1089                                 goto cleanup1;
1090                         }
1091                         if ((ioc->buf_size < 1) &&
1092                             (ioc->Request.Type.Direction != XFER_NONE)) {
1093                                 status = -EINVAL;
1094                                 goto cleanup1;
1095                         }
1096                         /* Check kmalloc limits  using all SGs */
1097                         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1098                                 status = -EINVAL;
1099                                 goto cleanup1;
1100                         }
1101                         if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1102                                 status = -EINVAL;
1103                                 goto cleanup1;
1104                         }
1105                         buff =
1106                             kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1107                         if (!buff) {
1108                                 status = -ENOMEM;
1109                                 goto cleanup1;
1110                         }
1111                         buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
1112                                                    GFP_KERNEL);
1113                         if (!buff_size) {
1114                                 status = -ENOMEM;
1115                                 goto cleanup1;
1116                         }
1117                         left = ioc->buf_size;
1118                         data_ptr = ioc->buf;
1119                         while (left) {
1120                                 sz = (left >
1121                                       ioc->malloc_size) ? ioc->
1122                                     malloc_size : left;
1123                                 buff_size[sg_used] = sz;
1124                                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1125                                 if (buff[sg_used] == NULL) {
1126                                         status = -ENOMEM;
1127                                         goto cleanup1;
1128                                 }
1129                                 if (ioc->Request.Type.Direction == XFER_WRITE) {
1130                                         if (copy_from_user
1131                                             (buff[sg_used], data_ptr, sz)) {
1132                                                 status = -EFAULT;
1133                                                 goto cleanup1;
1134                                         }
1135                                 } else {
1136                                         memset(buff[sg_used], 0, sz);
1137                                 }
1138                                 left -= sz;
1139                                 data_ptr += sz;
1140                                 sg_used++;
1141                         }
1142                         if ((c = cmd_alloc(host, 0)) == NULL) {
1143                                 status = -ENOMEM;
1144                                 goto cleanup1;
1145                         }
1146                         c->cmd_type = CMD_IOCTL_PEND;
1147                         c->Header.ReplyQueue = 0;
1148
1149                         if (ioc->buf_size > 0) {
1150                                 c->Header.SGList = sg_used;
1151                                 c->Header.SGTotal = sg_used;
1152                         } else {
1153                                 c->Header.SGList = 0;
1154                                 c->Header.SGTotal = 0;
1155                         }
1156                         c->Header.LUN = ioc->LUN_info;
1157                         c->Header.Tag.lower = c->busaddr;
1158
1159                         c->Request = ioc->Request;
1160                         if (ioc->buf_size > 0) {
1161                                 int i;
1162                                 for (i = 0; i < sg_used; i++) {
1163                                         temp64.val =
1164                                             pci_map_single(host->pdev, buff[i],
1165                                                     buff_size[i],
1166                                                     PCI_DMA_BIDIRECTIONAL);
1167                                         c->SG[i].Addr.lower =
1168                                             temp64.val32.lower;
1169                                         c->SG[i].Addr.upper =
1170                                             temp64.val32.upper;
1171                                         c->SG[i].Len = buff_size[i];
1172                                         c->SG[i].Ext = 0;       /* we are not chaining */
1173                                 }
1174                         }
1175                         c->waiting = &wait;
1176                         /* Put the request on the tail of the request queue */
1177                         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1178                         addQ(&host->reqQ, c);
1179                         host->Qdepth++;
1180                         start_io(host);
1181                         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1182                         wait_for_completion(&wait);
1183                         /* unlock the buffers from DMA */
1184                         for (i = 0; i < sg_used; i++) {
1185                                 temp64.val32.lower = c->SG[i].Addr.lower;
1186                                 temp64.val32.upper = c->SG[i].Addr.upper;
1187                                 pci_unmap_single(host->pdev,
1188                                         (dma_addr_t) temp64.val, buff_size[i],
1189                                         PCI_DMA_BIDIRECTIONAL);
1190                         }
1191                         /* Copy the error information out */
1192                         ioc->error_info = *(c->err_info);
1193                         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1194                                 cmd_free(host, c, 0);
1195                                 status = -EFAULT;
1196                                 goto cleanup1;
1197                         }
1198                         if (ioc->Request.Type.Direction == XFER_READ) {
1199                                 /* Copy the data out of the buffer we created */
1200                                 BYTE __user *ptr = ioc->buf;
1201                                 for (i = 0; i < sg_used; i++) {
1202                                         if (copy_to_user
1203                                             (ptr, buff[i], buff_size[i])) {
1204                                                 cmd_free(host, c, 0);
1205                                                 status = -EFAULT;
1206                                                 goto cleanup1;
1207                                         }
1208                                         ptr += buff_size[i];
1209                                 }
1210                         }
1211                         cmd_free(host, c, 0);
1212                         status = 0;
1213                       cleanup1:
1214                         if (buff) {
1215                                 for (i = 0; i < sg_used; i++)
1216                                         kfree(buff[i]);
1217                                 kfree(buff);
1218                         }
1219                         kfree(buff_size);
1220                         kfree(ioc);
1221                         return status;
1222                 }
1223
1224         /* scsi_cmd_ioctl handles these, below, though some are not */
1225         /* very meaningful for cciss.  SG_IO is the main one people want. */
1226
1227         case SG_GET_VERSION_NUM:
1228         case SG_SET_TIMEOUT:
1229         case SG_GET_TIMEOUT:
1230         case SG_GET_RESERVED_SIZE:
1231         case SG_SET_RESERVED_SIZE:
1232         case SG_EMULATED_HOST:
1233         case SG_IO:
1234         case SCSI_IOCTL_SEND_COMMAND:
1235                 return scsi_cmd_ioctl(disk->queue, disk,
1236                                       filep ? filep->f_mode : 0, cmd, argp);
1237
1238         /* scsi_cmd_ioctl would normally handle these, below, but */
1239         /* they aren't a good fit for cciss, as CD-ROMs are */
1240         /* not supported, and we don't have any bus/target/lun */
1241         /* which we present to the kernel. */
1242
1243         case CDROM_SEND_PACKET:
1244         case CDROMCLOSETRAY:
1245         case CDROMEJECT:
1246         case SCSI_IOCTL_GET_IDLUN:
1247         case SCSI_IOCTL_GET_BUS_NUMBER:
1248         default:
1249                 return -ENOTTY;
1250         }
1251 }
1252
1253 static void cciss_check_queues(ctlr_info_t *h)
1254 {
1255         int start_queue = h->next_to_run;
1256         int i;
1257
1258         /* check to see if we have maxed out the number of commands that can
1259          * be placed on the queue.  If so then exit.  We do this check here
1260          * in case the interrupt we serviced was from an ioctl and did not
1261          * free any new commands.
1262          */
1263         if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
1264                 return;
1265
1266         /* We have room on the queue for more commands.  Now we need to queue
1267          * them up.  We will also keep track of the next queue to run so
1268          * that every queue gets a chance to be started first.
1269          */
1270         for (i = 0; i < h->highest_lun + 1; i++) {
1271                 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1272                 /* make sure the disk has been added and the drive is real
1273                  * because this can be called from the middle of init_one.
1274                  */
1275                 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1276                         continue;
1277                 blk_start_queue(h->gendisk[curr_queue]->queue);
1278
1279                 /* check to see if we have maxed out the number of commands
1280                  * that can be placed on the queue.
1281                  */
1282                 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
1283                         if (curr_queue == start_queue) {
1284                                 h->next_to_run =
1285                                     (start_queue + 1) % (h->highest_lun + 1);
1286                                 break;
1287                         } else {
1288                                 h->next_to_run = curr_queue;
1289                                 break;
1290                         }
1291                 }
1292         }
1293 }
1294
1295 static void cciss_softirq_done(struct request *rq)
1296 {
1297         CommandList_struct *cmd = rq->completion_data;
1298         ctlr_info_t *h = hba[cmd->ctlr];
1299         unsigned long flags;
1300         u64bit temp64;
1301         int i, ddir;
1302
1303         if (cmd->Request.Type.Direction == XFER_READ)
1304                 ddir = PCI_DMA_FROMDEVICE;
1305         else
1306                 ddir = PCI_DMA_TODEVICE;
1307
1308         /* command did not need to be retried */
1309         /* unmap the DMA mapping for all the scatter gather elements */
1310         for (i = 0; i < cmd->Header.SGList; i++) {
1311                 temp64.val32.lower = cmd->SG[i].Addr.lower;
1312                 temp64.val32.upper = cmd->SG[i].Addr.upper;
1313                 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1314         }
1315
1316 #ifdef CCISS_DEBUG
1317         printk("Done with %p\n", rq);
1318 #endif                          /* CCISS_DEBUG */
1319
1320         if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO, blk_rq_bytes(rq)))
1321                 BUG();
1322
1323         spin_lock_irqsave(&h->lock, flags);
1324         cmd_free(h, cmd, 1);
1325         cciss_check_queues(h);
1326         spin_unlock_irqrestore(&h->lock, flags);
1327 }
1328
1329 /* This function gets the serial number of a logical drive via
1330  * inquiry page 0x83.  Serial no. is 16 bytes.  If the serial
1331  * number cannot be had, for whatever reason, 16 bytes of 0xff
1332  * are returned instead.
1333  */
1334 static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1335                                 unsigned char *serial_no, int buflen)
1336 {
1337 #define PAGE_83_INQ_BYTES 64
1338         int rc;
1339         unsigned char *buf;
1340
1341         if (buflen > 16)
1342                 buflen = 16;
1343         memset(serial_no, 0xff, buflen);
1344         buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1345         if (!buf)
1346                 return;
1347         memset(serial_no, 0, buflen);
1348         if (withirq)
1349                 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1350                         PAGE_83_INQ_BYTES, 1, logvol, 0x83, TYPE_CMD);
1351         else
1352                 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
1353                         PAGE_83_INQ_BYTES, 1, logvol, 0x83, NULL, TYPE_CMD);
1354         if (rc == IO_OK)
1355                 memcpy(serial_no, &buf[8], buflen);
1356         kfree(buf);
1357         return;
1358 }
1359
1360 static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1361                                 int drv_index)
1362 {
1363         disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1364         sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1365         disk->major = h->major;
1366         disk->first_minor = drv_index << NWD_SHIFT;
1367         disk->fops = &cciss_fops;
1368         disk->private_data = &h->drv[drv_index];
1369
1370         /* Set up queue information */
1371         blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1372
1373         /* This is a hardware imposed limit. */
1374         blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1375
1376         /* This is a limit in the driver and could be eliminated. */
1377         blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1378
1379         blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1380
1381         blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1382
1383         disk->queue->queuedata = h;
1384
1385         blk_queue_hardsect_size(disk->queue,
1386                                 h->drv[drv_index].block_size);
1387
1388         /* Make sure all queue data is written out before */
1389         /* setting h->drv[drv_index].queue, as setting this */
1390         /* allows the interrupt handler to start the queue */
1391         wmb();
1392         h->drv[drv_index].queue = disk->queue;
1393         add_disk(disk);
1394 }
1395
1396 /* This function will check the usage_count of the drive to be updated/added.
1397  * If the usage_count is zero and it is a heretofore unknown drive, or,
1398  * the drive's capacity, geometry, or serial number has changed,
1399  * then the drive information will be updated and the disk will be
1400  * re-registered with the kernel.  If these conditions don't hold,
1401  * then it will be left alone for the next reboot.  The exception to this
1402  * is disk 0 which will always be left registered with the kernel since it
1403  * is also the controller node.  Any changes to disk 0 will show up on
1404  * the next reboot.
1405  */
1406 static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
1407 {
1408         ctlr_info_t *h = hba[ctlr];
1409         struct gendisk *disk;
1410         InquiryData_struct *inq_buff = NULL;
1411         unsigned int block_size;
1412         sector_t total_size;
1413         unsigned long flags = 0;
1414         int ret = 0;
1415         drive_info_struct *drvinfo;
1416         int was_only_controller_node;
1417
1418         /* Get information about the disk and modify the driver structure */
1419         inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1420         drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1421         if (inq_buff == NULL || drvinfo == NULL)
1422                 goto mem_msg;
1423
1424         /* See if we're trying to update the "controller node"
1425          * this will happen the when the first logical drive gets
1426          * created by ACU.
1427          */
1428         was_only_controller_node = (drv_index == 0 &&
1429                                 h->drv[0].raid_level == -1);
1430
1431         /* testing to see if 16-byte CDBs are already being used */
1432         if (h->cciss_read == CCISS_READ_16) {
1433                 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1434                         &total_size, &block_size);
1435
1436         } else {
1437                 cciss_read_capacity(ctlr, drv_index, 1,
1438                                     &total_size, &block_size);
1439
1440                 /* if read_capacity returns all F's this volume is >2TB */
1441                 /* in size so we switch to 16-byte CDB's for all */
1442                 /* read/write ops */
1443                 if (total_size == 0xFFFFFFFFULL) {
1444                         cciss_read_capacity_16(ctlr, drv_index, 1,
1445                         &total_size, &block_size);
1446                         h->cciss_read = CCISS_READ_16;
1447                         h->cciss_write = CCISS_WRITE_16;
1448                 } else {
1449                         h->cciss_read = CCISS_READ_10;
1450                         h->cciss_write = CCISS_WRITE_10;
1451                 }
1452         }
1453
1454         cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1455                                inq_buff, drvinfo);
1456         drvinfo->block_size = block_size;
1457         drvinfo->nr_blocks = total_size + 1;
1458
1459         cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1460                         sizeof(drvinfo->serial_no));
1461
1462         /* Is it the same disk we already know, and nothing's changed? */
1463         if (h->drv[drv_index].raid_level != -1 &&
1464                 ((memcmp(drvinfo->serial_no,
1465                                 h->drv[drv_index].serial_no, 16) == 0) &&
1466                 drvinfo->block_size == h->drv[drv_index].block_size &&
1467                 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1468                 drvinfo->heads == h->drv[drv_index].heads &&
1469                 drvinfo->sectors == h->drv[drv_index].sectors &&
1470                 drvinfo->cylinders == h->drv[drv_index].cylinders))
1471                         /* The disk is unchanged, nothing to update */
1472                         goto freeret;
1473
1474         /* If we get here it's not the same disk, or something's changed,
1475          * so we need to * deregister it, and re-register it, if it's not
1476          * in use.
1477          * If the disk already exists then deregister it before proceeding
1478          * (unless it's the first disk (for the controller node).
1479          */
1480         if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1481                 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
1482                 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1483                 h->drv[drv_index].busy_configuring = 1;
1484                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1485
1486                 /* deregister_disk sets h->drv[drv_index].queue = NULL
1487                  * which keeps the interrupt handler from starting
1488                  * the queue.
1489                  */
1490                 ret = deregister_disk(h->gendisk[drv_index],
1491                                       &h->drv[drv_index], 0);
1492                 h->drv[drv_index].busy_configuring = 0;
1493         }
1494
1495         /* If the disk is in use return */
1496         if (ret)
1497                 goto freeret;
1498
1499         /* Save the new information from cciss_geometry_inquiry
1500          * and serial number inquiry.
1501          */
1502         h->drv[drv_index].block_size = drvinfo->block_size;
1503         h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1504         h->drv[drv_index].heads = drvinfo->heads;
1505         h->drv[drv_index].sectors = drvinfo->sectors;
1506         h->drv[drv_index].cylinders = drvinfo->cylinders;
1507         h->drv[drv_index].raid_level = drvinfo->raid_level;
1508         memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
1509
1510         ++h->num_luns;
1511         disk = h->gendisk[drv_index];
1512         set_capacity(disk, h->drv[drv_index].nr_blocks);
1513
1514         /* If it's not disk 0 (drv_index != 0)
1515          * or if it was disk 0, but there was previously
1516          * no actual corresponding configured logical drive
1517          * (raid_leve == -1) then we want to update the
1518          * logical drive's information.
1519          */
1520         if (drv_index || first_time)
1521                 cciss_add_disk(h, disk, drv_index);
1522
1523 freeret:
1524         kfree(inq_buff);
1525         kfree(drvinfo);
1526         return;
1527 mem_msg:
1528         printk(KERN_ERR "cciss: out of memory\n");
1529         goto freeret;
1530 }
1531
1532 /* This function will find the first index of the controllers drive array
1533  * that has a -1 for the raid_level and will return that index.  This is
1534  * where new drives will be added.  If the index to be returned is greater
1535  * than the highest_lun index for the controller then highest_lun is set
1536  * to this new index.  If there are no available indexes then -1 is returned.
1537  * "controller_node" is used to know if this is a real logical drive, or just
1538  * the controller node, which determines if this counts towards highest_lun.
1539  */
1540 static int cciss_find_free_drive_index(int ctlr, int controller_node)
1541 {
1542         int i;
1543
1544         for (i = 0; i < CISS_MAX_LUN; i++) {
1545                 if (hba[ctlr]->drv[i].raid_level == -1) {
1546                         if (i > hba[ctlr]->highest_lun)
1547                                 if (!controller_node)
1548                                         hba[ctlr]->highest_lun = i;
1549                         return i;
1550                 }
1551         }
1552         return -1;
1553 }
1554
1555 /* cciss_add_gendisk finds a free hba[]->drv structure
1556  * and allocates a gendisk if needed, and sets the lunid
1557  * in the drvinfo structure.   It returns the index into
1558  * the ->drv[] array, or -1 if none are free.
1559  * is_controller_node indicates whether highest_lun should
1560  * count this disk, or if it's only being added to provide
1561  * a means to talk to the controller in case no logical
1562  * drives have yet been configured.
1563  */
1564 static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
1565 {
1566         int drv_index;
1567
1568         drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
1569         if (drv_index == -1)
1570                 return -1;
1571         /*Check if the gendisk needs to be allocated */
1572         if (!h->gendisk[drv_index]) {
1573                 h->gendisk[drv_index] =
1574                         alloc_disk(1 << NWD_SHIFT);
1575                 if (!h->gendisk[drv_index]) {
1576                         printk(KERN_ERR "cciss%d: could not "
1577                                 "allocate a new disk %d\n",
1578                                 h->ctlr, drv_index);
1579                         return -1;
1580                 }
1581         }
1582         h->drv[drv_index].LunID = lunid;
1583
1584         /* Don't need to mark this busy because nobody */
1585         /* else knows about this disk yet to contend */
1586         /* for access to it. */
1587         h->drv[drv_index].busy_configuring = 0;
1588         wmb();
1589         return drv_index;
1590 }
1591
1592 /* This is for the special case of a controller which
1593  * has no logical drives.  In this case, we still need
1594  * to register a disk so the controller can be accessed
1595  * by the Array Config Utility.
1596  */
1597 static void cciss_add_controller_node(ctlr_info_t *h)
1598 {
1599         struct gendisk *disk;
1600         int drv_index;
1601
1602         if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1603                 return;
1604
1605         drv_index = cciss_add_gendisk(h, 0, 1);
1606         if (drv_index == -1) {
1607                 printk(KERN_WARNING "cciss%d: could not "
1608                         "add disk 0.\n", h->ctlr);
1609                 return;
1610         }
1611         h->drv[drv_index].block_size = 512;
1612         h->drv[drv_index].nr_blocks = 0;
1613         h->drv[drv_index].heads = 0;
1614         h->drv[drv_index].sectors = 0;
1615         h->drv[drv_index].cylinders = 0;
1616         h->drv[drv_index].raid_level = -1;
1617         memset(h->drv[drv_index].serial_no, 0, 16);
1618         disk = h->gendisk[drv_index];
1619         cciss_add_disk(h, disk, drv_index);
1620 }
1621
1622 /* This function will add and remove logical drives from the Logical
1623  * drive array of the controller and maintain persistency of ordering
1624  * so that mount points are preserved until the next reboot.  This allows
1625  * for the removal of logical drives in the middle of the drive array
1626  * without a re-ordering of those drives.
1627  * INPUT
1628  * h            = The controller to perform the operations on
1629  */
1630 static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1631 {
1632         int ctlr = h->ctlr;
1633         int num_luns;
1634         ReportLunData_struct *ld_buff = NULL;
1635         int return_code;
1636         int listlength = 0;
1637         int i;
1638         int drv_found;
1639         int drv_index = 0;
1640         __u32 lunid = 0;
1641         unsigned long flags;
1642
1643         if (!capable(CAP_SYS_RAWIO))
1644                 return -EPERM;
1645
1646         /* Set busy_configuring flag for this operation */
1647         spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1648         if (h->busy_configuring) {
1649                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1650                 return -EBUSY;
1651         }
1652         h->busy_configuring = 1;
1653         spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1654
1655         ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1656         if (ld_buff == NULL)
1657                 goto mem_msg;
1658
1659         return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
1660                                       sizeof(ReportLunData_struct), 0,
1661                                       0, 0, TYPE_CMD);
1662
1663         if (return_code == IO_OK)
1664                 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
1665         else {  /* reading number of logical volumes failed */
1666                 printk(KERN_WARNING "cciss: report logical volume"
1667                        " command failed\n");
1668                 listlength = 0;
1669                 goto freeret;
1670         }
1671
1672         num_luns = listlength / 8;      /* 8 bytes per entry */
1673         if (num_luns > CISS_MAX_LUN) {
1674                 num_luns = CISS_MAX_LUN;
1675                 printk(KERN_WARNING "cciss: more luns configured"
1676                        " on controller than can be handled by"
1677                        " this driver.\n");
1678         }
1679
1680         if (num_luns == 0)
1681                 cciss_add_controller_node(h);
1682
1683         /* Compare controller drive array to driver's drive array
1684          * to see if any drives are missing on the controller due
1685          * to action of Array Config Utility (user deletes drive)
1686          * and deregister logical drives which have disappeared.
1687          */
1688         for (i = 0; i <= h->highest_lun; i++) {
1689                 int j;
1690                 drv_found = 0;
1691                 for (j = 0; j < num_luns; j++) {
1692                         memcpy(&lunid, &ld_buff->LUN[j][0], 4);
1693                         lunid = le32_to_cpu(lunid);
1694                         if (h->drv[i].LunID == lunid) {
1695                                 drv_found = 1;
1696                                 break;
1697                         }
1698                 }
1699                 if (!drv_found) {
1700                         /* Deregister it from the OS, it's gone. */
1701                         spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1702                         h->drv[i].busy_configuring = 1;
1703                         spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1704                         return_code = deregister_disk(h->gendisk[i],
1705                                 &h->drv[i], 1);
1706                         h->drv[i].busy_configuring = 0;
1707                 }
1708         }
1709
1710         /* Compare controller drive array to driver's drive array.
1711          * Check for updates in the drive information and any new drives
1712          * on the controller due to ACU adding logical drives, or changing
1713          * a logical drive's size, etc.  Reregister any new/changed drives
1714          */
1715         for (i = 0; i < num_luns; i++) {
1716                 int j;
1717
1718                 drv_found = 0;
1719
1720                 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
1721                 lunid = le32_to_cpu(lunid);
1722
1723                 /* Find if the LUN is already in the drive array
1724                  * of the driver.  If so then update its info
1725                  * if not in use.  If it does not exist then find
1726                  * the first free index and add it.
1727                  */
1728                 for (j = 0; j <= h->highest_lun; j++) {
1729                         if (h->drv[j].raid_level != -1 &&
1730                                 h->drv[j].LunID == lunid) {
1731                                 drv_index = j;
1732                                 drv_found = 1;
1733                                 break;
1734                         }
1735                 }
1736
1737                 /* check if the drive was found already in the array */
1738                 if (!drv_found) {
1739                         drv_index = cciss_add_gendisk(h, lunid, 0);
1740                         if (drv_index == -1)
1741                                 goto freeret;
1742                 }
1743                 cciss_update_drive_info(ctlr, drv_index, first_time);
1744         }               /* end for */
1745
1746 freeret:
1747         kfree(ld_buff);
1748         h->busy_configuring = 0;
1749         /* We return -1 here to tell the ACU that we have registered/updated
1750          * all of the drives that we can and to keep it from calling us
1751          * additional times.
1752          */
1753         return -1;
1754 mem_msg:
1755         printk(KERN_ERR "cciss: out of memory\n");
1756         h->busy_configuring = 0;
1757         goto freeret;
1758 }
1759
1760 /* This function will deregister the disk and it's queue from the
1761  * kernel.  It must be called with the controller lock held and the
1762  * drv structures busy_configuring flag set.  It's parameters are:
1763  *
1764  * disk = This is the disk to be deregistered
1765  * drv  = This is the drive_info_struct associated with the disk to be
1766  *        deregistered.  It contains information about the disk used
1767  *        by the driver.
1768  * clear_all = This flag determines whether or not the disk information
1769  *             is going to be completely cleared out and the highest_lun
1770  *             reset.  Sometimes we want to clear out information about
1771  *             the disk in preparation for re-adding it.  In this case
1772  *             the highest_lun should be left unchanged and the LunID
1773  *             should not be cleared.
1774 */
1775 static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
1776                            int clear_all)
1777 {
1778         int i;
1779         ctlr_info_t *h = get_host(disk);
1780
1781         if (!capable(CAP_SYS_RAWIO))
1782                 return -EPERM;
1783
1784         /* make sure logical volume is NOT is use */
1785         if (clear_all || (h->gendisk[0] == disk)) {
1786                 if (drv->usage_count > 1)
1787                         return -EBUSY;
1788         } else if (drv->usage_count > 0)
1789                 return -EBUSY;
1790
1791         /* invalidate the devices and deregister the disk.  If it is disk
1792          * zero do not deregister it but just zero out it's values.  This
1793          * allows us to delete disk zero but keep the controller registered.
1794          */
1795         if (h->gendisk[0] != disk) {
1796                 struct request_queue *q = disk->queue;
1797                 if (disk->flags & GENHD_FL_UP)
1798                         del_gendisk(disk);
1799                 if (q) {
1800                         blk_cleanup_queue(q);
1801                         /* Set drv->queue to NULL so that we do not try
1802                          * to call blk_start_queue on this queue in the
1803                          * interrupt handler
1804                          */
1805                         drv->queue = NULL;
1806                 }
1807                 /* If clear_all is set then we are deleting the logical
1808                  * drive, not just refreshing its info.  For drives
1809                  * other than disk 0 we will call put_disk.  We do not
1810                  * do this for disk 0 as we need it to be able to
1811                  * configure the controller.
1812                  */
1813                 if (clear_all){
1814                         /* This isn't pretty, but we need to find the
1815                          * disk in our array and NULL our the pointer.
1816                          * This is so that we will call alloc_disk if
1817                          * this index is used again later.
1818                          */
1819                         for (i=0; i < CISS_MAX_LUN; i++){
1820                                 if (h->gendisk[i] == disk) {
1821                                         h->gendisk[i] = NULL;
1822                                         break;
1823                                 }
1824                         }
1825                         put_disk(disk);
1826                 }
1827         } else {
1828                 set_capacity(disk, 0);
1829         }
1830
1831         --h->num_luns;
1832         /* zero out the disk size info */
1833         drv->nr_blocks = 0;
1834         drv->block_size = 0;
1835         drv->heads = 0;
1836         drv->sectors = 0;
1837         drv->cylinders = 0;
1838         drv->raid_level = -1;   /* This can be used as a flag variable to
1839                                  * indicate that this element of the drive
1840                                  * array is free.
1841                                  */
1842
1843         if (clear_all) {
1844                 /* check to see if it was the last disk */
1845                 if (drv == h->drv + h->highest_lun) {
1846                         /* if so, find the new hightest lun */
1847                         int i, newhighest = -1;
1848                         for (i = 0; i <= h->highest_lun; i++) {
1849                                 /* if the disk has size > 0, it is available */
1850                                 if (h->drv[i].heads)
1851                                         newhighest = i;
1852                         }
1853                         h->highest_lun = newhighest;
1854                 }
1855
1856                 drv->LunID = 0;
1857         }
1858         return 0;
1859 }
1860
1861 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,
1862                                                                                                                            1: address logical volume log_unit,
1863                                                                                                                            2: periph device address is scsi3addr */
1864                     unsigned int log_unit, __u8 page_code,
1865                     unsigned char *scsi3addr, int cmd_type)
1866 {
1867         ctlr_info_t *h = hba[ctlr];
1868         u64bit buff_dma_handle;
1869         int status = IO_OK;
1870
1871         c->cmd_type = CMD_IOCTL_PEND;
1872         c->Header.ReplyQueue = 0;
1873         if (buff != NULL) {
1874                 c->Header.SGList = 1;
1875                 c->Header.SGTotal = 1;
1876         } else {
1877                 c->Header.SGList = 0;
1878                 c->Header.SGTotal = 0;
1879         }
1880         c->Header.Tag.lower = c->busaddr;
1881
1882         c->Request.Type.Type = cmd_type;
1883         if (cmd_type == TYPE_CMD) {
1884                 switch (cmd) {
1885                 case CISS_INQUIRY:
1886                         /* If the logical unit number is 0 then, this is going
1887                            to controller so It's a physical command
1888                            mode = 0 target = 0.  So we have nothing to write.
1889                            otherwise, if use_unit_num == 1,
1890                            mode = 1(volume set addressing) target = LUNID
1891                            otherwise, if use_unit_num == 2,
1892                            mode = 0(periph dev addr) target = scsi3addr */
1893                         if (use_unit_num == 1) {
1894                                 c->Header.LUN.LogDev.VolId =
1895                                     h->drv[log_unit].LunID;
1896                                 c->Header.LUN.LogDev.Mode = 1;
1897                         } else if (use_unit_num == 2) {
1898                                 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
1899                                        8);
1900                                 c->Header.LUN.LogDev.Mode = 0;
1901                         }
1902                         /* are we trying to read a vital product page */
1903                         if (page_code != 0) {
1904                                 c->Request.CDB[1] = 0x01;
1905                                 c->Request.CDB[2] = page_code;
1906                         }
1907                         c->Request.CDBLen = 6;
1908                         c->Request.Type.Attribute = ATTR_SIMPLE;
1909                         c->Request.Type.Direction = XFER_READ;
1910                         c->Request.Timeout = 0;
1911                         c->Request.CDB[0] = CISS_INQUIRY;
1912                         c->Request.CDB[4] = size & 0xFF;
1913                         break;
1914                 case CISS_REPORT_LOG:
1915                 case CISS_REPORT_PHYS:
1916                         /* Talking to controller so It's a physical command
1917                            mode = 00 target = 0.  Nothing to write.
1918                          */
1919                         c->Request.CDBLen = 12;
1920                         c->Request.Type.Attribute = ATTR_SIMPLE;
1921                         c->Request.Type.Direction = XFER_READ;
1922                         c->Request.Timeout = 0;
1923                         c->Request.CDB[0] = cmd;
1924                         c->Request.CDB[6] = (size >> 24) & 0xFF;        //MSB
1925                         c->Request.CDB[7] = (size >> 16) & 0xFF;
1926                         c->Request.CDB[8] = (size >> 8) & 0xFF;
1927                         c->Request.CDB[9] = size & 0xFF;
1928                         break;
1929
1930                 case CCISS_READ_CAPACITY:
1931                         c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1932                         c->Header.LUN.LogDev.Mode = 1;
1933                         c->Request.CDBLen = 10;
1934                         c->Request.Type.Attribute = ATTR_SIMPLE;
1935                         c->Request.Type.Direction = XFER_READ;
1936                         c->Request.Timeout = 0;
1937                         c->Request.CDB[0] = cmd;
1938                         break;
1939                 case CCISS_READ_CAPACITY_16:
1940                         c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1941                         c->Header.LUN.LogDev.Mode = 1;
1942                         c->Request.CDBLen = 16;
1943                         c->Request.Type.Attribute = ATTR_SIMPLE;
1944                         c->Request.Type.Direction = XFER_READ;
1945                         c->Request.Timeout = 0;
1946                         c->Request.CDB[0] = cmd;
1947                         c->Request.CDB[1] = 0x10;
1948                         c->Request.CDB[10] = (size >> 24) & 0xFF;
1949                         c->Request.CDB[11] = (size >> 16) & 0xFF;
1950                         c->Request.CDB[12] = (size >> 8) & 0xFF;
1951                         c->Request.CDB[13] = size & 0xFF;
1952                         c->Request.Timeout = 0;
1953                         c->Request.CDB[0] = cmd;
1954                         break;
1955                 case CCISS_CACHE_FLUSH:
1956                         c->Request.CDBLen = 12;
1957                         c->Request.Type.Attribute = ATTR_SIMPLE;
1958                         c->Request.Type.Direction = XFER_WRITE;
1959                         c->Request.Timeout = 0;
1960                         c->Request.CDB[0] = BMIC_WRITE;
1961                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
1962                         break;
1963                 default:
1964                         printk(KERN_WARNING
1965                                "cciss%d:  Unknown Command 0x%c\n", ctlr, cmd);
1966                         return IO_ERROR;
1967                 }
1968         } else if (cmd_type == TYPE_MSG) {
1969                 switch (cmd) {
1970                 case 0: /* ABORT message */
1971                         c->Request.CDBLen = 12;
1972                         c->Request.Type.Attribute = ATTR_SIMPLE;
1973                         c->Request.Type.Direction = XFER_WRITE;
1974                         c->Request.Timeout = 0;
1975                         c->Request.CDB[0] = cmd;        /* abort */
1976                         c->Request.CDB[1] = 0;  /* abort a command */
1977                         /* buff contains the tag of the command to abort */
1978                         memcpy(&c->Request.CDB[4], buff, 8);
1979                         break;
1980                 case 1: /* RESET message */
1981                         c->Request.CDBLen = 12;
1982                         c->Request.Type.Attribute = ATTR_SIMPLE;
1983                         c->Request.Type.Direction = XFER_WRITE;
1984                         c->Request.Timeout = 0;
1985                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
1986                         c->Request.CDB[0] = cmd;        /* reset */
1987                         c->Request.CDB[1] = 0x04;       /* reset a LUN */
1988                         break;
1989                 case 3: /* No-Op message */
1990                         c->Request.CDBLen = 1;
1991                         c->Request.Type.Attribute = ATTR_SIMPLE;
1992                         c->Request.Type.Direction = XFER_WRITE;
1993                         c->Request.Timeout = 0;
1994                         c->Request.CDB[0] = cmd;
1995                         break;
1996                 default:
1997                         printk(KERN_WARNING
1998                                "cciss%d: unknown message type %d\n", ctlr, cmd);
1999                         return IO_ERROR;
2000                 }
2001         } else {
2002                 printk(KERN_WARNING
2003                        "cciss%d: unknown command type %d\n", ctlr, cmd_type);
2004                 return IO_ERROR;
2005         }
2006         /* Fill in the scatter gather information */
2007         if (size > 0) {
2008                 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
2009                                                              buff, size,
2010                                                              PCI_DMA_BIDIRECTIONAL);
2011                 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2012                 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2013                 c->SG[0].Len = size;
2014                 c->SG[0].Ext = 0;       /* we are not chaining */
2015         }
2016         return status;
2017 }
2018
2019 static int sendcmd_withirq(__u8 cmd,
2020                            int ctlr,
2021                            void *buff,
2022                            size_t size,
2023                            unsigned int use_unit_num,
2024                            unsigned int log_unit, __u8 page_code, int cmd_type)
2025 {
2026         ctlr_info_t *h = hba[ctlr];
2027         CommandList_struct *c;
2028         u64bit buff_dma_handle;
2029         unsigned long flags;
2030         int return_status;
2031         DECLARE_COMPLETION_ONSTACK(wait);
2032
2033         if ((c = cmd_alloc(h, 0)) == NULL)
2034                 return -ENOMEM;
2035         return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2036                                  log_unit, page_code, NULL, cmd_type);
2037         if (return_status != IO_OK) {
2038                 cmd_free(h, c, 0);
2039                 return return_status;
2040         }
2041       resend_cmd2:
2042         c->waiting = &wait;
2043
2044         /* Put the request on the tail of the queue and send it */
2045         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
2046         addQ(&h->reqQ, c);
2047         h->Qdepth++;
2048         start_io(h);
2049         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
2050
2051         wait_for_completion(&wait);
2052
2053         if (c->err_info->CommandStatus != 0) {  /* an error has occurred */
2054                 switch (c->err_info->CommandStatus) {
2055                 case CMD_TARGET_STATUS:
2056                         printk(KERN_WARNING "cciss: cmd %p has "
2057                                " completed with errors\n", c);
2058                         if (c->err_info->ScsiStatus) {
2059                                 printk(KERN_WARNING "cciss: cmd %p "
2060                                        "has SCSI Status = %x\n",
2061                                        c, c->err_info->ScsiStatus);
2062                         }
2063
2064                         break;
2065                 case CMD_DATA_UNDERRUN:
2066                 case CMD_DATA_OVERRUN:
2067                         /* expected for inquire and report lun commands */
2068                         break;
2069                 case CMD_INVALID:
2070                         printk(KERN_WARNING "cciss: Cmd %p is "
2071                                "reported invalid\n", c);
2072                         return_status = IO_ERROR;
2073                         break;
2074                 case CMD_PROTOCOL_ERR:
2075                         printk(KERN_WARNING "cciss: cmd %p has "
2076                                "protocol error \n", c);
2077                         return_status = IO_ERROR;
2078                         break;
2079                 case CMD_HARDWARE_ERR:
2080                         printk(KERN_WARNING "cciss: cmd %p had "
2081                                " hardware error\n", c);
2082                         return_status = IO_ERROR;
2083                         break;
2084                 case CMD_CONNECTION_LOST:
2085                         printk(KERN_WARNING "cciss: cmd %p had "
2086                                "connection lost\n", c);
2087                         return_status = IO_ERROR;
2088                         break;
2089                 case CMD_ABORTED:
2090                         printk(KERN_WARNING "cciss: cmd %p was "
2091                                "aborted\n", c);
2092                         return_status = IO_ERROR;
2093                         break;
2094                 case CMD_ABORT_FAILED:
2095                         printk(KERN_WARNING "cciss: cmd %p reports "
2096                                "abort failed\n", c);
2097                         return_status = IO_ERROR;
2098                         break;
2099                 case CMD_UNSOLICITED_ABORT:
2100                         printk(KERN_WARNING
2101                                "cciss%d: unsolicited abort %p\n", ctlr, c);
2102                         if (c->retry_count < MAX_CMD_RETRIES) {
2103                                 printk(KERN_WARNING
2104                                        "cciss%d: retrying %p\n", ctlr, c);
2105                                 c->retry_count++;
2106                                 /* erase the old error information */
2107                                 memset(c->err_info, 0,
2108                                        sizeof(ErrorInfo_struct));
2109                                 return_status = IO_OK;
2110                                 INIT_COMPLETION(wait);
2111                                 goto resend_cmd2;
2112                         }
2113                         return_status = IO_ERROR;
2114                         break;
2115                 default:
2116                         printk(KERN_WARNING "cciss: cmd %p returned "
2117                                "unknown status %x\n", c,
2118                                c->err_info->CommandStatus);
2119                         return_status = IO_ERROR;
2120                 }
2121         }
2122         /* unlock the buffers from DMA */
2123         buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2124         buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2125         pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2126                          c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2127         cmd_free(h, c, 0);
2128         return return_status;
2129 }
2130
2131 static void cciss_geometry_inquiry(int ctlr, int logvol,
2132                                    int withirq, sector_t total_size,
2133                                    unsigned int block_size,
2134                                    InquiryData_struct *inq_buff,
2135                                    drive_info_struct *drv)
2136 {
2137         int return_code;
2138         unsigned long t;
2139
2140         memset(inq_buff, 0, sizeof(InquiryData_struct));
2141         if (withirq)
2142                 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
2143                                               inq_buff, sizeof(*inq_buff), 1,
2144                                               logvol, 0xC1, TYPE_CMD);
2145         else
2146                 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
2147                                       sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
2148                                       TYPE_CMD);
2149         if (return_code == IO_OK) {
2150                 if (inq_buff->data_byte[8] == 0xFF) {
2151                         printk(KERN_WARNING
2152                                "cciss: reading geometry failed, volume "
2153                                "does not support reading geometry\n");
2154                         drv->heads = 255;
2155                         drv->sectors = 32;      // Sectors per track
2156                         drv->cylinders = total_size + 1;
2157                         drv->raid_level = RAID_UNKNOWN;
2158                 } else {
2159                         drv->heads = inq_buff->data_byte[6];
2160                         drv->sectors = inq_buff->data_byte[7];
2161                         drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2162                         drv->cylinders += inq_buff->data_byte[5];
2163                         drv->raid_level = inq_buff->data_byte[8];
2164                 }
2165                 drv->block_size = block_size;
2166                 drv->nr_blocks = total_size + 1;
2167                 t = drv->heads * drv->sectors;
2168                 if (t > 1) {
2169                         sector_t real_size = total_size + 1;
2170                         unsigned long rem = sector_div(real_size, t);
2171                         if (rem)
2172                                 real_size++;
2173                         drv->cylinders = real_size;
2174                 }
2175         } else {                /* Get geometry failed */
2176                 printk(KERN_WARNING "cciss: reading geometry failed\n");
2177         }
2178         printk(KERN_INFO "      heads=%d, sectors=%d, cylinders=%d\n\n",
2179                drv->heads, drv->sectors, drv->cylinders);
2180 }
2181
2182 static void
2183 cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
2184                     unsigned int *block_size)
2185 {
2186         ReadCapdata_struct *buf;
2187         int return_code;
2188
2189         buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2190         if (!buf) {
2191                 printk(KERN_WARNING "cciss: out of memory\n");
2192                 return;
2193         }
2194
2195         if (withirq)
2196                 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
2197                                 ctlr, buf, sizeof(ReadCapdata_struct),
2198                                         1, logvol, 0, TYPE_CMD);
2199         else
2200                 return_code = sendcmd(CCISS_READ_CAPACITY,
2201                                 ctlr, buf, sizeof(ReadCapdata_struct),
2202                                         1, logvol, 0, NULL, TYPE_CMD);
2203         if (return_code == IO_OK) {
2204                 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2205                 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2206         } else {                /* read capacity command failed */
2207                 printk(KERN_WARNING "cciss: read capacity failed\n");
2208                 *total_size = 0;
2209                 *block_size = BLOCK_SIZE;
2210         }
2211         if (*total_size != 0)
2212                 printk(KERN_INFO "      blocks= %llu block_size= %d\n",
2213                 (unsigned long long)*total_size+1, *block_size);
2214         kfree(buf);
2215 }
2216
2217 static void
2218 cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size,                                 unsigned int *block_size)
2219 {
2220         ReadCapdata_struct_16 *buf;
2221         int return_code;
2222
2223         buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2224         if (!buf) {
2225                 printk(KERN_WARNING "cciss: out of memory\n");
2226                 return;
2227         }
2228
2229         if (withirq) {
2230                 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2231                         ctlr, buf, sizeof(ReadCapdata_struct_16),
2232                                 1, logvol, 0, TYPE_CMD);
2233         }
2234         else {
2235                 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2236                         ctlr, buf, sizeof(ReadCapdata_struct_16),
2237                                 1, logvol, 0, NULL, TYPE_CMD);
2238         }
2239         if (return_code == IO_OK) {
2240                 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2241                 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2242         } else {                /* read capacity command failed */
2243                 printk(KERN_WARNING "cciss: read capacity failed\n");
2244                 *total_size = 0;
2245                 *block_size = BLOCK_SIZE;
2246         }
2247         printk(KERN_INFO "      blocks= %llu block_size= %d\n",
2248                (unsigned long long)*total_size+1, *block_size);
2249         kfree(buf);
2250 }
2251
2252 static int cciss_revalidate(struct gendisk *disk)
2253 {
2254         ctlr_info_t *h = get_host(disk);
2255         drive_info_struct *drv = get_drv(disk);
2256         int logvol;
2257         int FOUND = 0;
2258         unsigned int block_size;
2259         sector_t total_size;
2260         InquiryData_struct *inq_buff = NULL;
2261
2262         for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2263                 if (h->drv[logvol].LunID == drv->LunID) {
2264                         FOUND = 1;
2265                         break;
2266                 }
2267         }
2268
2269         if (!FOUND)
2270                 return 1;
2271
2272         inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2273         if (inq_buff == NULL) {
2274                 printk(KERN_WARNING "cciss: out of memory\n");
2275                 return 1;
2276         }
2277         if (h->cciss_read == CCISS_READ_10) {
2278                 cciss_read_capacity(h->ctlr, logvol, 1,
2279                                         &total_size, &block_size);
2280         } else {
2281                 cciss_read_capacity_16(h->ctlr, logvol, 1,
2282                                         &total_size, &block_size);
2283         }
2284         cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2285                                inq_buff, drv);
2286
2287         blk_queue_hardsect_size(drv->queue, drv->block_size);
2288         set_capacity(disk, drv->nr_blocks);
2289
2290         kfree(inq_buff);
2291         return 0;
2292 }
2293
2294 /*
2295  *   Wait polling for a command to complete.
2296  *   The memory mapped FIFO is polled for the completion.
2297  *   Used only at init time, interrupts from the HBA are disabled.
2298  */
2299 static unsigned long pollcomplete(int ctlr)
2300 {
2301         unsigned long done;
2302         int i;
2303
2304         /* Wait (up to 20 seconds) for a command to complete */
2305
2306         for (i = 20 * HZ; i > 0; i--) {
2307                 done = hba[ctlr]->access.command_completed(hba[ctlr]);
2308                 if (done == FIFO_EMPTY)
2309                         schedule_timeout_uninterruptible(1);
2310                 else
2311                         return done;
2312         }
2313         /* Invalid address to tell caller we ran out of time */
2314         return 1;
2315 }
2316
2317 static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2318 {
2319         /* We get in here if sendcmd() is polling for completions
2320            and gets some command back that it wasn't expecting --
2321            something other than that which it just sent down.
2322            Ordinarily, that shouldn't happen, but it can happen when
2323            the scsi tape stuff gets into error handling mode, and
2324            starts using sendcmd() to try to abort commands and
2325            reset tape drives.  In that case, sendcmd may pick up
2326            completions of commands that were sent to logical drives
2327            through the block i/o system, or cciss ioctls completing, etc.
2328            In that case, we need to save those completions for later
2329            processing by the interrupt handler.
2330          */
2331
2332 #ifdef CONFIG_CISS_SCSI_TAPE
2333         struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
2334
2335         /* If it's not the scsi tape stuff doing error handling, (abort */
2336         /* or reset) then we don't expect anything weird. */
2337         if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2338 #endif
2339                 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2340                        "Invalid command list address returned! (%lx)\n",
2341                        ctlr, complete);
2342                 /* not much we can do. */
2343 #ifdef CONFIG_CISS_SCSI_TAPE
2344                 return 1;
2345         }
2346
2347         /* We've sent down an abort or reset, but something else
2348            has completed */
2349         if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
2350                 /* Uh oh.  No room to save it for later... */
2351                 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
2352                        "reject list overflow, command lost!\n", ctlr);
2353                 return 1;
2354         }
2355         /* Save it for later */
2356         srl->complete[srl->ncompletions] = complete;
2357         srl->ncompletions++;
2358 #endif
2359         return 0;
2360 }
2361
2362 /*
2363  * Send a command to the controller, and wait for it to complete.
2364  * Only used at init time.
2365  */
2366 static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num,      /* 0: address the controller,
2367                                                                                                    1: address logical volume log_unit,
2368                                                                                                    2: periph device address is scsi3addr */
2369                    unsigned int log_unit,
2370                    __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2371 {
2372         CommandList_struct *c;
2373         int i;
2374         unsigned long complete;
2375         ctlr_info_t *info_p = hba[ctlr];
2376         u64bit buff_dma_handle;
2377         int status, done = 0;
2378
2379         if ((c = cmd_alloc(info_p, 1)) == NULL) {
2380                 printk(KERN_WARNING "cciss: unable to get memory");
2381                 return IO_ERROR;
2382         }
2383         status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2384                           log_unit, page_code, scsi3addr, cmd_type);
2385         if (status != IO_OK) {
2386                 cmd_free(info_p, c, 1);
2387                 return status;
2388         }
2389       resend_cmd1:
2390         /*
2391          * Disable interrupt
2392          */
2393 #ifdef CCISS_DEBUG
2394         printk(KERN_DEBUG "cciss: turning intr off\n");
2395 #endif                          /* CCISS_DEBUG */
2396         info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
2397
2398         /* Make sure there is room in the command FIFO */
2399         /* Actually it should be completely empty at this time */
2400         /* unless we are in here doing error handling for the scsi */
2401         /* tape side of the driver. */
2402         for (i = 200000; i > 0; i--) {
2403                 /* if fifo isn't full go */
2404                 if (!(info_p->access.fifo_full(info_p))) {
2405
2406                         break;
2407                 }
2408                 udelay(10);
2409                 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
2410                        " waiting!\n", ctlr);
2411         }
2412         /*
2413          * Send the cmd
2414          */
2415         info_p->access.submit_command(info_p, c);
2416         done = 0;
2417         do {
2418                 complete = pollcomplete(ctlr);
2419
2420 #ifdef CCISS_DEBUG
2421                 printk(KERN_DEBUG "cciss: command completed\n");
2422 #endif                          /* CCISS_DEBUG */
2423
2424                 if (complete == 1) {
2425                         printk(KERN_WARNING
2426                                "cciss cciss%d: SendCmd Timeout out, "
2427                                "No command list address returned!\n", ctlr);
2428                         status = IO_ERROR;
2429                         done = 1;
2430                         break;
2431                 }
2432
2433                 /* This will need to change for direct lookup completions */
2434                 if ((complete & CISS_ERROR_BIT)
2435                     && (complete & ~CISS_ERROR_BIT) == c->busaddr) {
2436                         /* if data overrun or underun on Report command
2437                            ignore it
2438                          */
2439                         if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2440                              (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2441                              (c->Request.CDB[0] == CISS_INQUIRY)) &&
2442                             ((c->err_info->CommandStatus ==
2443                               CMD_DATA_OVERRUN) ||
2444                              (c->err_info->CommandStatus == CMD_DATA_UNDERRUN)
2445                             )) {
2446                                 complete = c->busaddr;
2447                         } else {
2448                                 if (c->err_info->CommandStatus ==
2449                                     CMD_UNSOLICITED_ABORT) {
2450                                         printk(KERN_WARNING "cciss%d: "
2451                                                "unsolicited abort %p\n",
2452                                                ctlr, c);
2453                                         if (c->retry_count < MAX_CMD_RETRIES) {
2454                                                 printk(KERN_WARNING
2455                                                        "cciss%d: retrying %p\n",
2456                                                        ctlr, c);
2457                                                 c->retry_count++;
2458                                                 /* erase the old error */
2459                                                 /* information */
2460                                                 memset(c->err_info, 0,
2461                                                        sizeof
2462                                                        (ErrorInfo_struct));
2463                                                 goto resend_cmd1;
2464                                         } else {
2465                                                 printk(KERN_WARNING
2466                                                        "cciss%d: retried %p too "
2467                                                        "many times\n", ctlr, c);
2468                                                 status = IO_ERROR;
2469                                                 goto cleanup1;
2470                                         }
2471                                 } else if (c->err_info->CommandStatus ==
2472                                            CMD_UNABORTABLE) {
2473                                         printk(KERN_WARNING
2474                                                "cciss%d: command could not be aborted.\n",
2475                                                ctlr);
2476                                         status = IO_ERROR;
2477                                         goto cleanup1;
2478                                 }
2479                                 printk(KERN_WARNING "ciss ciss%d: sendcmd"
2480                                        " Error %x \n", ctlr,
2481                                        c->err_info->CommandStatus);
2482                                 printk(KERN_WARNING "ciss ciss%d: sendcmd"
2483                                        " offensive info\n"
2484                                        "  size %x\n   num %x   value %x\n",
2485                                        ctlr,
2486                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2487                                        offense_size,
2488                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2489                                        offense_num,
2490                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2491                                        offense_value);
2492                                 status = IO_ERROR;
2493                                 goto cleanup1;
2494                         }
2495                 }
2496                 /* This will need changing for direct lookup completions */
2497                 if (complete != c->busaddr) {
2498                         if (add_sendcmd_reject(cmd, ctlr, complete) != 0) {
2499                                 BUG();  /* we are pretty much hosed if we get here. */
2500                         }
2501                         continue;
2502                 } else
2503                         done = 1;
2504         } while (!done);
2505
2506       cleanup1:
2507         /* unlock the data buffer from DMA */
2508         buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2509         buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2510         pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
2511                          c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2512 #ifdef CONFIG_CISS_SCSI_TAPE
2513         /* if we saved some commands for later, process them now. */
2514         if (info_p->scsi_rejects.ncompletions > 0)
2515                 do_cciss_intr(0, info_p);
2516 #endif
2517         cmd_free(info_p, c, 1);
2518         return status;
2519 }
2520
2521 /*
2522  * Map (physical) PCI mem into (virtual) kernel space
2523  */
2524 static void __iomem *remap_pci_mem(ulong base, ulong size)
2525 {
2526         ulong page_base = ((ulong) base) & PAGE_MASK;
2527         ulong page_offs = ((ulong) base) - page_base;
2528         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2529
2530         return page_remapped ? (page_remapped + page_offs) : NULL;
2531 }
2532
2533 /*
2534  * Takes jobs of the Q and sends them to the hardware, then puts it on
2535  * the Q to wait for completion.
2536  */
2537 static void start_io(ctlr_info_t *h)
2538 {
2539         CommandList_struct *c;
2540
2541         while ((c = h->reqQ) != NULL) {
2542                 /* can't do anything if fifo is full */
2543                 if ((h->access.fifo_full(h))) {
2544                         printk(KERN_WARNING "cciss: fifo full\n");
2545                         break;
2546                 }
2547
2548                 /* Get the first entry from the Request Q */
2549                 removeQ(&(h->reqQ), c);
2550                 h->Qdepth--;
2551
2552                 /* Tell the controller execute command */
2553                 h->access.submit_command(h, c);
2554
2555                 /* Put job onto the completed Q */
2556                 addQ(&(h->cmpQ), c);
2557         }
2558 }
2559
2560 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2561 /* Zeros out the error record and then resends the command back */
2562 /* to the controller */
2563 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2564 {
2565         /* erase the old error information */
2566         memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2567
2568         /* add it to software queue and then send it to the controller */
2569         addQ(&(h->reqQ), c);
2570         h->Qdepth++;
2571         if (h->Qdepth > h->maxQsinceinit)
2572                 h->maxQsinceinit = h->Qdepth;
2573
2574         start_io(h);
2575 }
2576
2577 static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2578         unsigned int msg_byte, unsigned int host_byte,
2579         unsigned int driver_byte)
2580 {
2581         /* inverse of macros in scsi.h */
2582         return (scsi_status_byte & 0xff) |
2583                 ((msg_byte & 0xff) << 8) |
2584                 ((host_byte & 0xff) << 16) |
2585                 ((driver_byte & 0xff) << 24);
2586 }
2587
2588 static inline int evaluate_target_status(CommandList_struct *cmd)
2589 {
2590         unsigned char sense_key;
2591         unsigned char status_byte, msg_byte, host_byte, driver_byte;
2592         int error_value;
2593
2594         /* If we get in here, it means we got "target status", that is, scsi status */
2595         status_byte = cmd->err_info->ScsiStatus;
2596         driver_byte = DRIVER_OK;
2597         msg_byte = cmd->err_info->CommandStatus; /* correct?  seems too device specific */
2598
2599         if (blk_pc_request(cmd->rq))
2600                 host_byte = DID_PASSTHROUGH;
2601         else
2602                 host_byte = DID_OK;
2603
2604         error_value = make_status_bytes(status_byte, msg_byte,
2605                 host_byte, driver_byte);
2606
2607         if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
2608                 if (!blk_pc_request(cmd->rq))
2609                         printk(KERN_WARNING "cciss: cmd %p "
2610                                "has SCSI Status 0x%x\n",
2611                                cmd, cmd->err_info->ScsiStatus);
2612                 return error_value;
2613         }
2614
2615         /* check the sense key */
2616         sense_key = 0xf & cmd->err_info->SenseInfo[2];
2617         /* no status or recovered error */
2618         if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2619                 error_value = 0;
2620
2621         if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
2622                 if (error_value != 0)
2623                         printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2624                                " sense key = 0x%x\n", cmd, sense_key);
2625                 return error_value;
2626         }
2627
2628         /* SG_IO or similar, copy sense data back */
2629         if (cmd->rq->sense) {
2630                 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2631                         cmd->rq->sense_len = cmd->err_info->SenseLen;
2632                 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2633                         cmd->rq->sense_len);
2634         } else
2635                 cmd->rq->sense_len = 0;
2636
2637         return error_value;
2638 }
2639
2640 /* checks the status of the job and calls complete buffers to mark all
2641  * buffers for the completed job. Note that this function does not need
2642  * to hold the hba/queue lock.
2643  */
2644 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2645                                     int timeout)
2646 {
2647         int retry_cmd = 0;
2648         struct request *rq = cmd->rq;
2649
2650         rq->errors = 0;
2651
2652         if (timeout)
2653                 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
2654
2655         if (cmd->err_info->CommandStatus == 0)  /* no error has occurred */
2656                 goto after_error_processing;
2657
2658         switch (cmd->err_info->CommandStatus) {
2659         case CMD_TARGET_STATUS:
2660                 rq->errors = evaluate_target_status(cmd);
2661                 break;
2662         case CMD_DATA_UNDERRUN:
2663                 if (blk_fs_request(cmd->rq)) {
2664                         printk(KERN_WARNING "cciss: cmd %p has"
2665                                " completed with data underrun "
2666                                "reported\n", cmd);
2667                         cmd->rq->data_len = cmd->err_info->ResidualCnt;
2668                 }
2669                 break;
2670         case CMD_DATA_OVERRUN:
2671                 if (blk_fs_request(cmd->rq))
2672                         printk(KERN_WARNING "cciss: cmd %p has"
2673                                " completed with data overrun "
2674                                "reported\n", cmd);
2675                 break;
2676         case CMD_INVALID:
2677                 printk(KERN_WARNING "cciss: cmd %p is "
2678                        "reported invalid\n", cmd);
2679                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2680                         cmd->err_info->CommandStatus, DRIVER_OK,
2681                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2682                 break;
2683         case CMD_PROTOCOL_ERR:
2684                 printk(KERN_WARNING "cciss: cmd %p has "
2685                        "protocol error \n", cmd);
2686                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2687                         cmd->err_info->CommandStatus, DRIVER_OK,
2688                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2689                 break;
2690         case CMD_HARDWARE_ERR:
2691                 printk(KERN_WARNING "cciss: cmd %p had "
2692                        " hardware error\n", cmd);
2693                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2694                         cmd->err_info->CommandStatus, DRIVER_OK,
2695                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2696                 break;
2697         case CMD_CONNECTION_LOST:
2698                 printk(KERN_WARNING "cciss: cmd %p had "
2699                        "connection lost\n", cmd);
2700                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2701                         cmd->err_info->CommandStatus, DRIVER_OK,
2702                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2703                 break;
2704         case CMD_ABORTED:
2705                 printk(KERN_WARNING "cciss: cmd %p was "
2706                        "aborted\n", cmd);
2707                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2708                         cmd->err_info->CommandStatus, DRIVER_OK,
2709                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
2710                 break;
2711         case CMD_ABORT_FAILED:
2712                 printk(KERN_WARNING "cciss: cmd %p reports "
2713                        "abort failed\n", cmd);
2714                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2715                         cmd->err_info->CommandStatus, DRIVER_OK,
2716                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2717                 break;
2718         case CMD_UNSOLICITED_ABORT:
2719                 printk(KERN_WARNING "cciss%d: unsolicited "
2720                        "abort %p\n", h->ctlr, cmd);
2721                 if (cmd->retry_count < MAX_CMD_RETRIES) {
2722                         retry_cmd = 1;
2723                         printk(KERN_WARNING
2724                                "cciss%d: retrying %p\n", h->ctlr, cmd);
2725                         cmd->retry_count++;
2726                 } else
2727                         printk(KERN_WARNING
2728                                "cciss%d: %p retried too "
2729                                "many times\n", h->ctlr, cmd);
2730                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2731                         cmd->err_info->CommandStatus, DRIVER_OK,
2732                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
2733                 break;
2734         case CMD_TIMEOUT:
2735                 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
2736                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2737                         cmd->err_info->CommandStatus, DRIVER_OK,
2738                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2739                 break;
2740         default:
2741                 printk(KERN_WARNING "cciss: cmd %p returned "
2742                        "unknown status %x\n", cmd,
2743                        cmd->err_info->CommandStatus);
2744                 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2745                         cmd->err_info->CommandStatus, DRIVER_OK,
2746                         blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2747         }
2748
2749 after_error_processing:
2750
2751         /* We need to return this command */
2752         if (retry_cmd) {
2753                 resend_cciss_cmd(h, cmd);
2754                 return;
2755         }
2756         cmd->rq->completion_data = cmd;
2757         blk_complete_request(cmd->rq);
2758 }
2759
2760 /*
2761  * Get a request and submit it to the controller.
2762  */
2763 static void do_cciss_request(struct request_queue *q)
2764 {
2765         ctlr_info_t *h = q->queuedata;
2766         CommandList_struct *c;
2767         sector_t start_blk;
2768         int seg;
2769         struct request *creq;
2770         u64bit temp64;
2771         struct scatterlist tmp_sg[MAXSGENTRIES];
2772         drive_info_struct *drv;
2773         int i, dir;
2774
2775         /* We call start_io here in case there is a command waiting on the
2776          * queue that has not been sent.
2777          */
2778         if (blk_queue_plugged(q))
2779                 goto startio;
2780
2781       queue:
2782         creq = elv_next_request(q);
2783         if (!creq)
2784                 goto startio;
2785
2786         BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
2787
2788         if ((c = cmd_alloc(h, 1)) == NULL)
2789                 goto full;
2790
2791         blkdev_dequeue_request(creq);
2792
2793         spin_unlock_irq(q->queue_lock);
2794
2795         c->cmd_type = CMD_RWREQ;
2796         c->rq = creq;
2797
2798         /* fill in the request */
2799         drv = creq->rq_disk->private_data;
2800         c->Header.ReplyQueue = 0;       // unused in simple mode
2801         /* got command from pool, so use the command block index instead */
2802         /* for direct lookups. */
2803         /* The first 2 bits are reserved for controller error reporting. */
2804         c->Header.Tag.lower = (c->cmdindex << 3);
2805         c->Header.Tag.lower |= 0x04;    /* flag for direct lookup. */
2806         c->Header.LUN.LogDev.VolId = drv->LunID;
2807         c->Header.LUN.LogDev.Mode = 1;
2808         c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
2809         c->Request.Type.Type = TYPE_CMD;        // It is a command.
2810         c->Request.Type.Attribute = ATTR_SIMPLE;
2811         c->Request.Type.Direction =
2812             (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
2813         c->Request.Timeout = 0; // Don't time out
2814         c->Request.CDB[0] =
2815             (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
2816         start_blk = creq->sector;
2817 #ifdef CCISS_DEBUG
2818         printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", (int)creq->sector,
2819                (int)creq->nr_sectors);
2820 #endif                          /* CCISS_DEBUG */
2821
2822         sg_init_table(tmp_sg, MAXSGENTRIES);
2823         seg = blk_rq_map_sg(q, creq, tmp_sg);
2824
2825         /* get the DMA records for the setup */
2826         if (c->Request.Type.Direction == XFER_READ)
2827                 dir = PCI_DMA_FROMDEVICE;
2828         else
2829                 dir = PCI_DMA_TODEVICE;
2830
2831         for (i = 0; i < seg; i++) {
2832                 c->SG[i].Len = tmp_sg[i].length;
2833                 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
2834                                                   tmp_sg[i].offset,
2835                                                   tmp_sg[i].length, dir);
2836                 c->SG[i].Addr.lower = temp64.val32.lower;
2837                 c->SG[i].Addr.upper = temp64.val32.upper;
2838                 c->SG[i].Ext = 0;       // we are not chaining
2839         }
2840         /* track how many SG entries we are using */
2841         if (seg > h->maxSG)
2842                 h->maxSG = seg;
2843
2844 #ifdef CCISS_DEBUG
2845         printk(KERN_DEBUG "cciss: Submitting %d sectors in %d segments\n",
2846                creq->nr_sectors, seg);
2847 #endif                          /* CCISS_DEBUG */
2848
2849         c->Header.SGList = c->Header.SGTotal = seg;
2850         if (likely(blk_fs_request(creq))) {
2851                 if(h->cciss_read == CCISS_READ_10) {
2852                         c->Request.CDB[1] = 0;
2853                         c->Request.CDB[2] = (start_blk >> 24) & 0xff;   //MSB
2854                         c->Request.CDB[3] = (start_blk >> 16) & 0xff;
2855                         c->Request.CDB[4] = (start_blk >> 8) & 0xff;
2856                         c->Request.CDB[5] = start_blk & 0xff;
2857                         c->Request.CDB[6] = 0;  // (sect >> 24) & 0xff; MSB
2858                         c->Request.CDB[7] = (creq->nr_sectors >> 8) & 0xff;
2859                         c->Request.CDB[8] = creq->nr_sectors & 0xff;
2860                         c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
2861                 } else {
2862                         u32 upper32 = upper_32_bits(start_blk);
2863
2864                         c->Request.CDBLen = 16;
2865                         c->Request.CDB[1]= 0;
2866                         c->Request.CDB[2]= (upper32 >> 24) & 0xff;      //MSB
2867                         c->Request.CDB[3]= (upper32 >> 16) & 0xff;
2868                         c->Request.CDB[4]= (upper32 >>  8) & 0xff;
2869                         c->Request.CDB[5]= upper32 & 0xff;
2870                         c->Request.CDB[6]= (start_blk >> 24) & 0xff;
2871                         c->Request.CDB[7]= (start_blk >> 16) & 0xff;
2872                         c->Request.CDB[8]= (start_blk >>  8) & 0xff;
2873                         c->Request.CDB[9]= start_blk & 0xff;
2874                         c->Request.CDB[10]= (creq->nr_sectors >>  24) & 0xff;
2875                         c->Request.CDB[11]= (creq->nr_sectors >>  16) & 0xff;
2876                         c->Request.CDB[12]= (creq->nr_sectors >>  8) & 0xff;
2877                         c->Request.CDB[13]= creq->nr_sectors & 0xff;
2878                         c->Request.CDB[14] = c->Request.CDB[15] = 0;
2879                 }
2880         } else if (blk_pc_request(creq)) {
2881                 c->Request.CDBLen = creq->cmd_len;
2882                 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
2883         } else {
2884                 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
2885                 BUG();
2886         }
2887
2888         spin_lock_irq(q->queue_lock);
2889
2890         addQ(&(h->reqQ), c);
2891         h->Qdepth++;
2892         if (h->Qdepth > h->maxQsinceinit)
2893                 h->maxQsinceinit = h->Qdepth;
2894
2895         goto queue;
2896 full:
2897         blk_stop_queue(q);
2898 startio:
2899         /* We will already have the driver lock here so not need
2900          * to lock it.
2901          */
2902         start_io(h);
2903 }
2904
2905 static inline unsigned long get_next_completion(ctlr_info_t *h)
2906 {
2907 #ifdef CONFIG_CISS_SCSI_TAPE
2908         /* Any rejects from sendcmd() lying around? Process them first */
2909         if (h->scsi_rejects.ncompletions == 0)
2910                 return h->access.command_completed(h);
2911         else {
2912                 struct sendcmd_reject_list *srl;
2913                 int n;
2914                 srl = &h->scsi_rejects;
2915                 n = --srl->ncompletions;
2916                 /* printk("cciss%d: processing saved reject\n", h->ctlr); */
2917                 printk("p");
2918                 return srl->complete[n];
2919         }
2920 #else
2921         return h->access.command_completed(h);
2922 #endif
2923 }
2924
2925 static inline int interrupt_pending(ctlr_info_t *h)
2926 {
2927 #ifdef CONFIG_CISS_SCSI_TAPE
2928         return (h->access.intr_pending(h)
2929                 || (h->scsi_rejects.ncompletions > 0));
2930 #else
2931         return h->access.intr_pending(h);
2932 #endif
2933 }
2934
2935 static inline long interrupt_not_for_us(ctlr_info_t *h)
2936 {
2937 #ifdef CONFIG_CISS_SCSI_TAPE
2938         return (((h->access.intr_pending(h) == 0) ||
2939                  (h->interrupts_enabled == 0))
2940                 && (h->scsi_rejects.ncompletions == 0));
2941 #else
2942         return (((h->access.intr_pending(h) == 0) ||
2943                  (h->interrupts_enabled == 0)));
2944 #endif
2945 }
2946
2947 static irqreturn_t do_cciss_intr(int irq, void *dev_id)
2948 {
2949         ctlr_info_t *h = dev_id;
2950         CommandList_struct *c;
2951         unsigned long flags;
2952         __u32 a, a1, a2;
2953
2954         if (interrupt_not_for_us(h))
2955                 return IRQ_NONE;
2956         /*
2957          * If there are completed commands in the completion queue,
2958          * we had better do something about it.
2959          */
2960         spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2961         while (interrupt_pending(h)) {
2962                 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
2963                         a1 = a;
2964                         if ((a & 0x04)) {
2965                                 a2 = (a >> 3);
2966                                 if (a2 >= h->nr_cmds) {
2967                                         printk(KERN_WARNING
2968                                                "cciss: controller cciss%d failed, stopping.\n",
2969                                                h->ctlr);
2970                                         fail_all_cmds(h->ctlr);
2971                                         return IRQ_HANDLED;
2972                                 }
2973
2974                                 c = h->cmd_pool + a2;
2975                                 a = c->busaddr;
2976
2977                         } else {
2978                                 a &= ~3;
2979                                 if ((c = h->cmpQ) == NULL) {
2980                                         printk(KERN_WARNING
2981                                                "cciss: Completion of %08x ignored\n",
2982                                                a1);
2983                                         continue;
2984                                 }
2985                                 while (c->busaddr != a) {
2986                                         c = c->next;
2987                                         if (c == h->cmpQ)
2988                                                 break;
2989                                 }
2990                         }
2991                         /*
2992                          * If we've found the command, take it off the
2993                          * completion Q and free it
2994                          */
2995                         if (c->busaddr == a) {
2996                                 removeQ(&h->cmpQ, c);
2997                                 if (c->cmd_type == CMD_RWREQ) {
2998                                         complete_command(h, c, 0);
2999                                 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3000                                         complete(c->waiting);
3001                                 }
3002 #                               ifdef CONFIG_CISS_SCSI_TAPE
3003                                 else if (c->cmd_type == CMD_SCSI)
3004                                         complete_scsi_command(c, 0, a1);
3005 #                               endif
3006                                 continue;
3007                         }
3008                 }
3009         }
3010
3011         spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3012         return IRQ_HANDLED;
3013 }
3014
3015 /*
3016  *  We cannot read the structure directly, for portability we must use
3017  *   the io functions.
3018  *   This is for debug only.
3019  */
3020 #ifdef CCISS_DEBUG
3021 static void print_cfg_table(CfgTable_struct *tb)
3022 {
3023         int i;
3024         char temp_name[17];
3025
3026         printk("Controller Configuration information\n");
3027         printk("------------------------------------\n");
3028         for (i = 0; i < 4; i++)
3029                 temp_name[i] = readb(&(tb->Signature[i]));
3030         temp_name[4] = '\0';
3031         printk("   Signature = %s\n", temp_name);
3032         printk("   Spec Number = %d\n", readl(&(tb->SpecValence)));
3033         printk("   Transport methods supported = 0x%x\n",
3034                readl(&(tb->TransportSupport)));
3035         printk("   Transport methods active = 0x%x\n",
3036                readl(&(tb->TransportActive)));
3037         printk("   Requested transport Method = 0x%x\n",
3038                readl(&(tb->HostWrite.TransportRequest)));
3039         printk("   Coalesce Interrupt Delay = 0x%x\n",
3040                readl(&(tb->HostWrite.CoalIntDelay)));
3041         printk("   Coalesce Interrupt Count = 0x%x\n",
3042                readl(&(tb->HostWrite.CoalIntCount)));
3043         printk("   Max outstanding commands = 0x%d\n",
3044                readl(&(tb->CmdsOutMax)));
3045         printk("   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3046         for (i = 0; i < 16; i++)
3047                 temp_name[i] = readb(&(tb->ServerName[i]));
3048         temp_name[16] = '\0';
3049         printk("   Server Name = %s\n", temp_name);
3050         printk("   Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
3051 }
3052 #endif                          /* CCISS_DEBUG */
3053
3054 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3055 {
3056         int i, offset, mem_type, bar_type;
3057         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3058                 return 0;
3059         offset = 0;
3060         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3061                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3062                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3063                         offset += 4;
3064                 else {
3065                         mem_type = pci_resource_flags(pdev, i) &
3066                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3067                         switch (mem_type) {
3068                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
3069                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3070                                 offset += 4;    /* 32 bit */
3071                                 break;
3072                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
3073                                 offset += 8;
3074                                 break;
3075                         default:        /* reserved in PCI 2.2 */
3076                                 printk(KERN_WARNING
3077                                        "Base address is invalid\n");
3078                                 return -1;
3079                                 break;
3080                         }
3081                 }
3082                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3083                         return i + 1;
3084         }
3085         return -1;
3086 }
3087
3088 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3089  * controllers that are capable. If not, we use IO-APIC mode.
3090  */
3091
3092 static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3093                                            struct pci_dev *pdev, __u32 board_id)
3094 {
3095 #ifdef CONFIG_PCI_MSI
3096         int err;
3097         struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3098         {0, 2}, {0, 3}
3099         };
3100
3101         /* Some boards advertise MSI but don't really support it */
3102         if ((board_id == 0x40700E11) ||
3103             (board_id == 0x40800E11) ||
3104             (board_id == 0x40820E11) || (board_id == 0x40830E11))
3105                 goto default_int_mode;
3106
3107         if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3108                 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3109                 if (!err) {
3110                         c->intr[0] = cciss_msix_entries[0].vector;
3111                         c->intr[1] = cciss_msix_entries[1].vector;
3112                         c->intr[2] = cciss_msix_entries[2].vector;
3113                         c->intr[3] = cciss_msix_entries[3].vector;
3114                         c->msix_vector = 1;
3115                         return;
3116                 }
3117                 if (err > 0) {
3118                         printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3119                                "available\n", err);
3120                         goto default_int_mode;
3121                 } else {
3122                         printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3123                                err);
3124                         goto default_int_mode;
3125                 }
3126         }
3127         if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3128                 if (!pci_enable_msi(pdev)) {
3129                         c->msi_vector = 1;
3130                 } else {
3131                         printk(KERN_WARNING "cciss: MSI init failed\n");
3132                 }
3133         }
3134 default_int_mode:
3135 #endif                          /* CONFIG_PCI_MSI */
3136         /* if we get here we're going to use the default interrupt mode */
3137         c->intr[SIMPLE_MODE_INT] = pdev->irq;
3138         return;
3139 }
3140
3141 static int __devinit cciss_pci_i