1 /*
2 * Disk Array driver for Compaq SMART2 Controllers
3 * Copyright 2000 Compaq Computer Corporation
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13 * NON INFRINGEMENT. See the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 *
19 * Questions/Comments/Bugfixes to arrays@compaq.com
20 *
21 */
22
23 #include <linux/config.h> /* CONFIG_PROC_FS */
24 #include <linux/module.h>
25 #include <linux/version.h>
26 #include <linux/types.h>
27 #include <linux/pci.h>
28 #include <linux/kernel.h>
29 #include <linux/malloc.h>
30 #include <linux/delay.h>
31 #include <linux/major.h>
32 #include <linux/fs.h>
33 #include <linux/blkpg.h>
34 #include <linux/timer.h>
35 #include <linux/proc_fs.h>
36 #include <linux/init.h>
37 #include <linux/hdreg.h>
38 #include <linux/spinlock.h>
39 #include <asm/uaccess.h>
40 #include <asm/io.h>
41
42 #include <linux/blk.h>
43 #include <linux/blkdev.h>
44 #include <linux/genhd.h>
45
46 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
47 #define DRIVER_NAME "Compaq CISS Driver (v 2.4.0)"
48 #define DRIVER_VERSION CCISS_DRIVER_VERSION(2,4,0)
49
50 /* Embedded module documentation macros - see modules.h */
51 MODULE_AUTHOR("Charles M. White III - Compaq Computer Corporation");
52 MODULE_DESCRIPTION("Driver for Compaq Smart Array Controller 5300");
53
54 #include "cciss_cmd.h"
55 #include "cciss.h"
56 #include <linux/cciss_ioctl.h>
57
58 #define NR_PRODUCTS (sizeof(products)/sizeof(struct board_type))
59
60 /* board_id = Subsystem Device ID & Vendor ID
61 * product = Marketing Name for the board
62 * access = Address of the struct of function pointers
63 */
64 static struct board_type products[] = {
65 { 0x40700E11, "Smart Array 5300", &SA5_access },
66 };
67
68 /* How long to wait (in millesconds) for board to go into simple mode */
69 #define MAX_CONFIG_WAIT 1000
70
71 #define READ_AHEAD 128
72 #define NR_CMDS 128 /* #commands that can be outstanding */
73 #define MAX_CTLR 8
74 static int nr_ctlr;
75 static ctlr_info_t *hba[MAX_CTLR];
76
77 static struct proc_dir_entry *proc_cciss;
78
79 static void do_cciss_request(int i);
80 /*
81 * This is a hack. This driver eats a major number for each controller, and
82 * sets blkdev[xxx].request_fn to each one of these so the real request
83 * function knows what controller its working with.
84 */
85 #define DO_CCISS_REQUEST(x) { do_cciss_request(x); }
86
87 static void do_cciss_request0(request_queue_t * q) DO_CCISS_REQUEST(0);
88 static void do_cciss_request1(request_queue_t * q) DO_CCISS_REQUEST(1);
89 static void do_cciss_request2(request_queue_t * q) DO_CCISS_REQUEST(2);
90 static void do_cciss_request3(request_queue_t * q) DO_CCISS_REQUEST(3);
91 static void do_cciss_request4(request_queue_t * q) DO_CCISS_REQUEST(4);
92 static void do_cciss_request5(request_queue_t * q) DO_CCISS_REQUEST(5);
93 static void do_cciss_request6(request_queue_t * q) DO_CCISS_REQUEST(6);
94 static void do_cciss_request7(request_queue_t * q) DO_CCISS_REQUEST(7);
95
96 static int cciss_open(struct inode *inode, struct file *filep);
97 static int cciss_release(struct inode *inode, struct file *filep);
98 static int cciss_ioctl(struct inode *inode, struct file *filep,
99 unsigned int cmd, unsigned long arg);
100
101 static int revalidate_allvol(kdev_t dev);
102 static int revalidate_logvol(kdev_t dev, int maxusage);
103 static int frevalidate_logvol(kdev_t dev);
104
105 static void cciss_getgeometry(int cntl_num);
106
107 static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c);
108 static void start_io( ctlr_info_t *h);
109
110 #ifdef CONFIG_PROC_FS
111 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
112 int length, int *eof, void *data);
113 static void cciss_procinit(int i);
114 #else
115 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
116 int length, int *eof, void *data) { return 0;}
117 static void cciss_procinit(int i) {}
118 #endif /* CONFIG_PROC_FS */
119
120 static struct block_device_operations cciss_fops = {
121 open: cciss_open,
122 release: cciss_release,
123 ioctl: cciss_ioctl,
124 revalidate: frevalidate_logvol,
125 };
126
127 /*
128 * Report information about this controller.
129 */
130 #ifdef CONFIG_PROC_FS
131 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
132 int length, int *eof, void *data)
133 {
134 off_t pos = 0;
135 off_t len = 0;
136 int size, i, ctlr;
137 ctlr_info_t *h = (ctlr_info_t*)data;
138 drive_info_struct *drv;
139
140 ctlr = h->ctlr;
141 size = sprintf(buffer, "%s: Compaq %s Controller\n"
142 " Board ID: %08lx\n"
143 " Firmware Version: %c%c%c%c\n"
144 " Memory Address: %08lx\n"
145 " IRQ: 0x%x\n"
146 " Logical drives: %d\n"
147 " Current Q depth: %d\n"
148 " Current # commands on controller %d\n"
149 " Max Q depth since init: %d\n"
150 " Max # commands on controller since init: %d\n"
151 " Max SG entries since init: %d\n\n",
152 h->devname,
153 h->product_name,
154 (unsigned long)h->board_id,
155 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], h->firm_ver[3],
156 (unsigned long)h->vaddr,
157 (unsigned int)h->intr,
158 h->num_luns,
159 h->Qdepth, h->commands_outstanding,
160 h->maxQsinceinit, h->max_outstanding, h->maxSG);
161
162 pos += size; len += size;
163 for(i=0; i<h->num_luns; i++) {
164 drv = &h->drv[i];
165 size = sprintf(buffer+len, "cciss/c%dd%d: blksz=%d nr_blocks=%d\n",
166 ctlr, i, drv->block_size, drv->nr_blocks);
167 pos += size; len += size;
168 }
169
170 size = sprintf(buffer+len, "nr_allocs = %d\nnr_frees = %d\n",
171 h->nr_allocs, h->nr_frees);
172 pos += size; len += size;
173
174 *eof = 1;
175 *start = buffer+offset;
176 len -= offset;
177 if (len>length)
178 len = length;
179 return len;
180 }
181
182 /*
183 * Get us a file in /proc/cciss that says something about each controller.
184 * Create /proc/cciss if it doesn't exist yet.
185 */
186 static void __init cciss_procinit(int i)
187 {
188 if (proc_cciss == NULL) {
189 proc_cciss = proc_mkdir("driver/cciss", NULL);
190 if (!proc_cciss)
191 return;
192 }
193
194 create_proc_read_entry(hba[i]->devname, 0, proc_cciss,
195 cciss_proc_get_info, hba[i]);
196 }
197 #endif /* CONFIG_PROC_FS */
198
199 /*
200 * For operations that cannot sleep, a command block is allocated at init,
201 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
202 * which ones are free or in use. For operations that can wait for kmalloc
203 * to possible sleep, this routine can be called with a NULL pointer.
204 * cmd_free() MUST be called with a NULL pointer if cmd_alloc was.
205 */
206 static CommandList_struct * cmd_alloc(ctlr_info_t *h)
207 {
208 CommandList_struct *c;
209 int i;
210 u64bit temp64;
211
212 if (h == NULL)
213 {
214 c = (CommandList_struct *)kmalloc(sizeof(CommandList_struct),
215 GFP_KERNEL);
216 if(c==NULL)
217 return NULL;
218 memset(c, 0, sizeof(CommandList_struct));
219
220 c->err_info = (ErrorInfo_struct *)kmalloc(
221 sizeof(ErrorInfo_struct), GFP_KERNEL);
222
223 if (c->err_info == NULL)
224 {
225 kfree(c);
226 return NULL;
227 }
228 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
229 } else /* get it out of the controllers pool */
230 {
231 do {
232 i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
233 if (i == NR_CMDS)
234 return NULL;
235 } while(test_and_set_bit(i%32, h->cmd_pool_bits+(i/32)) != 0);
236 #ifdef CCISS_DEBUG
237 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
238 #endif
239 c = h->cmd_pool + i;
240 memset(c, 0, sizeof(CommandList_struct));
241 c->err_info = h->errinfo_pool + i;
242 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
243 h->nr_allocs++;
244 }
245
246
247 temp64.val = (__u64) virt_to_bus(c->err_info);
248 c->ErrDesc.Addr.lower = temp64.val32.lower;
249 c->ErrDesc.Addr.upper = temp64.val32.upper;
250 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
251 c->busaddr = virt_to_bus(c);
252 return c;
253
254
255 }
256
257 /*
258 * Frees a command block that was previously allocated with cmd_alloc().
259 */
260 static void cmd_free(ctlr_info_t *h, CommandList_struct *c)
261 {
262 int i;
263
264 if( h == NULL)
265 {
266 kfree(c->err_info);
267 kfree(c);
268 } else
269 {
270 i = c - h->cmd_pool;
271 clear_bit(i%32, h->cmd_pool_bits+(i/32));
272 h->nr_frees++;
273 }
274 }
275
276 /*
277 * fills in the disk information.
278 */
279 static void cciss_geninit( int ctlr)
280 {
281 drive_info_struct *drv;
282 int i,j;
283
284 /* Loop through each real device */
285 hba[ctlr]->gendisk.nr_real = 0;
286 for(i=0; i< NWD; i++)
287 {
288 drv = &(hba[ctlr]->drv[i]);
289 if( !(drv->nr_blocks))
290 continue;
291 hba[ctlr]->hd[i << NWD_SHIFT].nr_sects =
292 hba[ctlr]->sizes[i << NWD_SHIFT] = drv->nr_blocks;
293
294 /* for each partition */
295 for(j=0; j<MAX_PART; j++)
296 {
297 hba[ctlr]->blocksizes[(i<<NWD_SHIFT) + j] = 1024;
298
299 hba[ctlr]->hardsizes[ (i<<NWD_SHIFT) + j] =
300 drv->block_size;
301 }
302 hba[ctlr]->gendisk.nr_real++;
303 }
304 }
305 /*
306 * Open. Make sure the device is really there.
307 */
308 static int cciss_open(struct inode *inode, struct file *filep)
309 {
310 int ctlr = MAJOR(inode->i_rdev) - MAJOR_NR;
311 int dsk = MINOR(inode->i_rdev) >> NWD_SHIFT;
312
313 #ifdef CCISS_DEBUG
314 printk(KERN_DEBUG "cciss_open %x (%x:%x)\n", inode->i_rdev, ctlr, dsk);
315 #endif /* CCISS_DEBUG */
316
317 if (ctlr > MAX_CTLR || hba[ctlr] == NULL)
318 return -ENXIO;
319
320 if (!suser() && hba[ctlr]->sizes[ MINOR(inode->i_rdev)] == 0)
321 return -ENXIO;
322
323 /*
324 * Root is allowed to open raw volume zero even if its not configured
325 * so array config can still work. I don't think I really like this,
326 * but I'm already using way to many device nodes to claim another one
327 * for "raw controller".
328 */
329 if (suser()
330 && (hba[ctlr]->sizes[MINOR(inode->i_rdev)] == 0)
331 && (MINOR(inode->i_rdev)!= 0))
332 return -ENXIO;
333
334 hba[ctlr]->drv[dsk].usage_count++;
335 hba[ctlr]->usage_count++;
336 MOD_INC_USE_COUNT;
337 return 0;
338 }
339 /*
340 * Close. Sync first.
341 */
342 static int cciss_release(struct inode *inode, struct file *filep)
343 {
344 int ctlr = MAJOR(inode->i_rdev) - MAJOR_NR;
345 int dsk = MINOR(inode->i_rdev) >> NWD_SHIFT;
346
347 #ifdef CCISS_DEBUG
348 printk(KERN_DEBUG "cciss_release %x (%x:%x)\n", inode->i_rdev, ctlr, dsk);
349 #endif /* CCISS_DEBUG */
350
351 /* fsync_dev(inode->i_rdev); */
352
353 hba[ctlr]->drv[dsk].usage_count--;
354 hba[ctlr]->usage_count--;
355 MOD_DEC_USE_COUNT;
356 return 0;
357 }
358
359 /*
360 * ioctl
361 */
362 static int cciss_ioctl(struct inode *inode, struct file *filep,
363 unsigned int cmd, unsigned long arg)
364 {
365 int ctlr = MAJOR(inode->i_rdev) - MAJOR_NR;
366 int dsk = MINOR(inode->i_rdev) >> NWD_SHIFT;
367 int diskinfo[4];
368 struct hd_geometry *geo = (struct hd_geometry *)arg;
369
370 #ifdef CCISS_DEBUG
371 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
372 #endif /* CCISS_DEBUG */
373
374 switch(cmd) {
375 case HDIO_GETGEO:
376 if (hba[ctlr]->drv[dsk].cylinders) {
377 diskinfo[0] = hba[ctlr]->drv[dsk].heads;
378 diskinfo[1] = hba[ctlr]->drv[dsk].sectors;
379 diskinfo[2] = hba[ctlr]->drv[dsk].cylinders;
380 } else {
381 diskinfo[0] = 0xff;
382 diskinfo[1] = 0x3f;
383 diskinfo[2] = hba[ctlr]->drv[dsk].nr_blocks / (0xff*0x3f); }
384 put_user(diskinfo[0], &geo->heads);
385 put_user(diskinfo[1], &geo->sectors);
386 put_user(diskinfo[2], &geo->cylinders);
387 put_user(hba[ctlr]->hd[MINOR(inode->i_rdev)].start_sect, &geo->start);
388 return 0;
389 case BLKGETSIZE:
390 if (!arg) return -EINVAL;
391 put_user(hba[ctlr]->hd[MINOR(inode->i_rdev)].nr_sects, (long*)arg);
392 return 0;
393 case BLKRRPART:
394 return revalidate_logvol(inode->i_rdev, 1);
395 case BLKFLSBUF:
396 case BLKROSET:
397 case BLKROGET:
398 case BLKRASET:
399 case BLKRAGET:
400 case BLKPG:
401 return( blk_ioctl(inode->i_rdev, cmd, arg));
402 case CCISS_GETPCIINFO:
403 {
404 cciss_pci_info_struct pciinfo;
405
406 if (!arg) return -EINVAL;
407 pciinfo.bus = hba[ctlr]->pci_bus;
408 pciinfo.dev_fn = hba[ctlr]->pci_dev_fn;
409 pciinfo.board_id = hba[ctlr]->board_id;
410 if (copy_to_user((void *) arg, &pciinfo, sizeof( cciss_pci_info_struct )))
411 return -EFAULT;
412 return(0);
413 }
414 case CCISS_GETINTINFO:
415 {
416 cciss_coalint_struct intinfo;
417 ctlr_info_t *c = hba[ctlr];
418
419 if (!arg) return -EINVAL;
420 intinfo.delay = readl(&c->cfgtable->HostWrite.CoalIntDelay);
421 intinfo.count = readl(&c->cfgtable->HostWrite.CoalIntCount);
422 if (copy_to_user((void *) arg, &intinfo, sizeof( cciss_coalint_struct )))
423 return -EFAULT;
424 return(0);
425 }
426 case CCISS_SETINTINFO:
427 {
428 cciss_coalint_struct intinfo;
429 ctlr_info_t *c = hba[ctlr];
430 unsigned long flags;
431 int i;
432
433 if (!arg) return -EINVAL;
434 if (!capable(CAP_SYS_ADMIN)) return -EPERM;
435 if (copy_from_user(&intinfo, (void *) arg, sizeof( cciss_coalint_struct)))
436 return -EFAULT;
437 if ( (intinfo.delay == 0 ) && (intinfo.count == 0))
438
439 {
440 // printk("cciss_ioctl: delay and count cannot be 0\n");
441 return( -EINVAL);
442 }
443 spin_lock_irqsave(&io_request_lock, flags);
444 /* Can only safely update if no commands outstanding */
445 if (c->commands_outstanding > 0 )
446 {
447 // printk("cciss_ioctl: cannot change coalasing "
448 // "%d commands outstanding on controller\n",
449 // c->commands_outstanding);
450 spin_unlock_irqrestore(&io_request_lock, flags);
451 return(-EINVAL);
452 }
453 /* Update the field, and then ring the doorbell */
454 writel( intinfo.delay,
455 &(c->cfgtable->HostWrite.CoalIntDelay));
456 writel( intinfo.count,
457 &(c->cfgtable->HostWrite.CoalIntCount));
458 writel( CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
459
460 for(i=0;i<MAX_CONFIG_WAIT;i++)
461 {
462 if (!(readl(c->vaddr + SA5_DOORBELL)
463 & CFGTBL_ChangeReq))
464 break;
465 /* delay and try again */
466 udelay(1000);
467 }
468 spin_unlock_irqrestore(&io_request_lock, flags);
469 if (i >= MAX_CONFIG_WAIT)
470 return( -EFAULT);
471 return(0);
472 }
473 case CCISS_GETNODENAME:
474 {
475 NodeName_type NodeName;
476 ctlr_info_t *c = hba[ctlr];
477 int i;
478
479 if (!arg) return -EINVAL;
480 for(i=0;i<16;i++)
481 NodeName[i] = readb(&c->cfgtable->ServerName[i]);
482 if (copy_to_user((void *) arg, NodeName, sizeof( NodeName_type)))
483 return -EFAULT;
484 return(0);
485 }
486 case CCISS_SETNODENAME:
487 {
488 NodeName_type NodeName;
489 ctlr_info_t *c = hba[ctlr];
490 unsigned long flags;
491 int i;
492
493 if (!arg) return -EINVAL;
494 if (!capable(CAP_SYS_ADMIN)) return -EPERM;
495
496 if (copy_from_user(NodeName, (void *) arg, sizeof( NodeName_type)))
497 return -EFAULT;
498
499 spin_lock_irqsave(&io_request_lock, flags);
500
501 /* Update the field, and then ring the doorbell */
502 for(i=0;i<16;i++)
503 writeb( NodeName[i], &c->cfgtable->ServerName[i]);
504
505 writel( CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
506
507 for(i=0;i<MAX_CONFIG_WAIT;i++)
508 {
509 if (!(readl(c->vaddr + SA5_DOORBELL)
510 & CFGTBL_ChangeReq))
511 break;
512 /* delay and try again */
513 udelay(1000);
514 }
515 spin_unlock_irqrestore(&io_request_lock, flags);
516 if (i >= MAX_CONFIG_WAIT)
517 return( -EFAULT);
518 return(0);
519 }
520
521 case CCISS_GETHEARTBEAT:
522 {
523 Heartbeat_type heartbeat;
524 ctlr_info_t *c = hba[ctlr];
525
526 if (!arg) return -EINVAL;
527 heartbeat = readl(&c->cfgtable->HeartBeat);
528 if (copy_to_user((void *) arg, &heartbeat, sizeof( Heartbeat_type)))
529 return -EFAULT;
530 return(0);
531 }
532 case CCISS_GETBUSTYPES:
533 {
534 BusTypes_type BusTypes;
535 ctlr_info_t *c = hba[ctlr];
536
537 if (!arg) return -EINVAL;
538 BusTypes = readl(&c->cfgtable->BusTypes);
539 if (copy_to_user((void *) arg, &BusTypes, sizeof( BusTypes_type) ))
540 return -EFAULT;
541 return(0);
542 }
543 case CCISS_GETFIRMVER:
544 {
545 FirmwareVer_type firmware;
546
547 if (!arg) return -EINVAL;
548 memcpy(firmware, hba[ctlr]->firm_ver, 4);
549
550 if (copy_to_user((void *) arg, firmware, sizeof( FirmwareVer_type)))
551 return -EFAULT;
552 return(0);
553 }
554 case CCISS_GETDRIVVER:
555 {
556 DriverVer_type DriverVer = DRIVER_VERSION;
557
558 if (!arg) return -EINVAL;
559
560 if (copy_to_user((void *) arg, &DriverVer, sizeof( DriverVer_type) ))
561 return -EFAULT;
562 return(0);
563 }
564
565 case CCISS_REVALIDVOLS:
566 return( revalidate_allvol(inode->i_rdev));
567
568 case CCISS_PASSTHRU:
569 {
570 IOCTL_Command_struct iocommand;
571 ctlr_info_t *h = hba[ctlr];
572 CommandList_struct *c;
573 char *buff = NULL;
574 u64bit temp64;
575 unsigned long flags;
576
577 if (!arg) return -EINVAL;
578
579 if (!capable(CAP_SYS_RAWIO)) return -EPERM;
580
581 if (copy_from_user(&iocommand, (void *) arg, sizeof( IOCTL_Command_struct) ))
582 return -EFAULT;
583 if((iocommand.buf_size < 1) &&
584 (iocommand.Request.Type.Direction != XFER_NONE))
585 {
586 return -EINVAL;
587 }
588 /* Check kmalloc limits */
589 if(iocommand.buf_size > 128000)
590 return -EINVAL;
591 if(iocommand.buf_size > 0)
592 {
593 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
594 if( buff == NULL)
595 return -EFAULT;
596 }
597 if (iocommand.Request.Type.Direction == XFER_WRITE)
598 {
599 /* Copy the data into the buffer we created */
600 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size))
601 return -EFAULT;
602 }
603 if ((c = cmd_alloc(NULL)) == NULL)
604 {
605 if(buff!=NULL)
606 kfree(buff);
607 return -ENOMEM;
608 }
609 // Fill in the command type
610 c->cmd_type = CMD_IOCTL_PEND;
611 // Fill in Command Header
612 c->Header.ReplyQueue = 0; // unused in simple mode
613 if( iocommand.buf_size > 0) // buffer to fill
614 {
615 c->Header.SGList = 1;
616 c->Header.SGTotal= 1;
617 } else // no buffers to fill
618 {
619 c->Header.SGList = 0;
620 c->Header.SGTotal= 0;
621 }
622 c->Header.LUN = iocommand.LUN_info;
623 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
624
625 // Fill in Request block
626 c->Request = iocommand.Request;
627
628 // Fill in the scatter gather information
629 if (iocommand.buf_size > 0 )
630 {
631 temp64.val = (__u64) virt_to_bus(buff);
632 c->SG[0].Addr.lower = temp64.val32.lower;
633 c->SG[0].Addr.upper = temp64.val32.upper;
634 c->SG[0].Len = iocommand.buf_size;
635 c->SG[0].Ext = 0; // we are not chaining
636 }
637 /* Put the request on the tail of the request queue */
638 spin_lock_irqsave(&io_request_lock, flags);
639 addQ(&h->reqQ, c);
640 h->Qdepth++;
641 start_io(h);
642 spin_unlock_irqrestore(&io_request_lock, flags);
643
644 /* Wait for completion */
645 while(c->cmd_type != CMD_IOCTL_DONE)
646 schedule_timeout(1);
647
648 /* Copy the error information out */
649 iocommand.error_info = *(c->err_info);
650 if ( copy_to_user((void *) arg, &iocommand, sizeof( IOCTL_Command_struct) ) )
651 {
652 cmd_free(NULL, c);
653 if (buff != NULL)
654 kfree(buff);
655 return( -EFAULT);
656 }
657
658 if (iocommand.Request.Type.Direction == XFER_READ)
659 {
660 /* Copy the data out of the buffer we created */
661 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size))
662 {
663 cmd_free(NULL, c);
664 kfree(buff);
665 }
666 }
667 cmd_free(NULL, c);
668 if (buff != NULL)
669 kfree(buff);
670 return(0);
671 }
672
673 default:
674 return -EBADRQC;
675 }
676
677 }
678
679 /* Borrowed and adapted from sd.c */
680 static int revalidate_logvol(kdev_t dev, int maxusage)
681 {
682 int ctlr, target;
683 struct gendisk *gdev;
684 unsigned long flags;
685 int max_p;
686 int start;
687 int i;
688
689 target = MINOR(dev) >> NWD_SHIFT;
690 ctlr = MAJOR(dev) - MAJOR_NR;
691 gdev = &(hba[ctlr]->gendisk);
692
693 spin_lock_irqsave(&io_request_lock, flags);
694 if (hba[ctlr]->drv[target].usage_count > maxusage) {
695 spin_unlock_irqrestore(&io_request_lock, flags);
696 printk(KERN_WARNING "cpqarray: Device busy for "
697 "revalidation (usage=%d)\n",
698 hba[ctlr]->drv[target].usage_count);
699 return -EBUSY;
700 }
701 hba[ctlr]->drv[target].usage_count++;
702 spin_unlock_irqrestore(&io_request_lock, flags);
703
704 max_p = gdev->max_p;
705 start = target << gdev->minor_shift;
706
707 for(i=max_p; i>=0; i--) {
708 int minor = start+i;
709 kdev_t devi = MKDEV(MAJOR_NR + ctlr, minor);
710 struct super_block *sb = get_super(devi);
711 sync_dev(devi);
712 if (sb) invalidate_inodes(sb);
713 invalidate_buffers(devi);
714 gdev->part[minor].start_sect = 0;
715 gdev->part[minor].nr_sects = 0;
716
717 /* reset the blocksize so we can read the partition table */
718 blksize_size[MAJOR_NR+ctlr][minor] = 1024;
719 }
720 /* setup partitions per disk */
721 grok_partitions(gdev, target, MAX_PART,
722 hba[ctlr]->drv[target].nr_blocks);
723 hba[ctlr]->drv[target].usage_count--;
724 return 0;
725 }
726
727 static int frevalidate_logvol(kdev_t dev)
728 {
729 #ifdef CCISS_DEBUG
730 printk(KERN_DEBUG "cciss: frevalidate has been called\n");
731 #endif /* CCISS_DEBUG */
732 return revalidate_logvol(dev, 0);
733 }
734
735 /*
736 * revalidate_allvol is for online array config utilities. After a
737 * utility reconfigures the drives in the array, it can use this function
738 * (through an ioctl) to make the driver zap any previous disk structs for
739 * that controller and get new ones.
740 *
741 * Right now I'm using the getgeometry() function to do this, but this
742 * function should probably be finer grained and allow you to revalidate one
743 * particualar logical volume (instead of all of them on a particular
744 * controller).
745 */
746 static int revalidate_allvol(kdev_t dev)
747 {
748 int ctlr, i;
749 unsigned long flags;
750
751 ctlr = MAJOR(dev) - MAJOR_NR;
752 if (MINOR(dev) != 0)
753 return -ENXIO;
754
755 spin_lock_irqsave(&io_request_lock, flags);
756 if (hba[ctlr]->usage_count > 1) {
757 spin_unlock_irqrestore(&io_request_lock, flags);
758 printk(KERN_WARNING "cciss: Device busy for volume"
759 " revalidation (usage=%d)\n", hba[ctlr]->usage_count);
760 return -EBUSY;
761 }
762 spin_unlock_irqrestore(&io_request_lock, flags);
763 hba[ctlr]->usage_count++;
764
765 /*
766 * Set the partition and block size structures for all volumes
767 * on this controller to zero. We will reread all of this data
768 */
769 memset(hba[ctlr]->hd, 0, sizeof(struct hd_struct) * 256);
770 memset(hba[ctlr]->sizes, 0, sizeof(int) * 256);
771 memset(hba[ctlr]->blocksizes, 0, sizeof(int) * 256);
772 memset(hba[ctlr]->hardsizes, 0, sizeof(int) * 256);
773 memset(hba[ctlr]->drv, 0, sizeof(drive_info_struct)
774 * CISS_MAX_LUN);
775 hba[ctlr]->gendisk.nr_real = 0;
776
777 /*
778 * Tell the array controller not to give us any interupts while
779 * we check the new geometry. Then turn interrupts back on when
780 * we're done.
781 */
782 hba[ctlr]->access.set_intr_mask(hba[ctlr], CCISS_INTR_OFF);
783 cciss_getgeometry(ctlr);
784 hba[ctlr]->access.set_intr_mask(hba[ctlr], CCISS_INTR_ON);
785
786 cciss_geninit(ctlr);
787 for(i=0; i<NWD; i++)
788 if (hba[ctlr]->sizes[ i<<NWD_SHIFT ])
789 revalidate_logvol(dev+(i<<NWD_SHIFT), 2);
790
791 hba[ctlr]->usage_count--;
792 return 0;
793 }
794
795
796
797 /*
798 * Wait polling for a command to complete.
799 * The memory mapped FIFO is polled for the completion.
800 * Used only at init time, interrupts disabled.
801 */
802 static unsigned long pollcomplete(int ctlr)
803 {
804 unsigned long done;
805 int i;
806
807 /* Wait (up to 2 seconds) for a command to complete */
808
809 for (i = 200000; i > 0; i--) {
810 done = hba[ctlr]->access.command_completed(hba[ctlr]);
811 if (done == FIFO_EMPTY) {
812 udelay(10); /* a short fixed delay */
813 } else
814 return (done);
815 }
816 /* Invalid address to tell caller we ran out of time */
817 return 1;
818 }
819 /*
820 * Send a command to the controller, and wait for it to complete.
821 * Only used at init time.
822 */
823 static int sendcmd(
824 __u8 cmd,
825 int ctlr,
826 void *buff,
827 size_t size,
828 unsigned int use_unit_num,
829 unsigned int log_unit,
830 __u8 page_code )
831 {
832 CommandList_struct *c;
833 int i;
834 unsigned long complete;
835 ctlr_info_t *info_p= hba[ctlr];
836 u64bit temp64;
837
838 c = cmd_alloc(info_p);
839 if (c == NULL)
840 {
841 printk(KERN_WARNING "cciss: unable to get memory");
842 return(IO_ERROR);
843 }
844 // Fill in Command Header
845 c->Header.ReplyQueue = 0; // unused in simple mode
846 if( buff != NULL) // buffer to fill
847 {
848 c->Header.SGList = 1;
849 c->Header.SGTotal= 1;
850 } else // no buffers to fill
851 {
852 c->Header.SGList = 0;
853 c->Header.SGTotal= 0;
854 }
855 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
856 // Fill in Request block
857 switch(cmd)
858 {
859 case CISS_INQUIRY:
860 /* If the logical unit number is 0 then, this is going
861 to controller so It's a physical command
862 mode = 0 target = 0.
863 So we have nothing to write.
864 Otherwise
865 mode = 1 target = LUNID
866 */
867 if(use_unit_num != 0)
868 {
869 c->Header.LUN.LogDev.VolId=
870 hba[ctlr]->drv[log_unit].LunID;
871 c->Header.LUN.LogDev.Mode = 1;
872 }
873 /* are we trying to read a vital product page */
874 if(page_code != 0)
875 {
876 c->Request.CDB[1] = 0x01;
877 c->Request.CDB[2] = page_code;
878 }
879 c->Request.CDBLen = 6;
880 c->Request.Type.Type = TYPE_CMD; // It is a command.
881 c->Request.Type.Attribute = ATTR_SIMPLE;
882 c->Request.Type.Direction = XFER_READ; // Read
883 c->Request.Timeout = 0; // Don't time out
884 c->Request.CDB[0] = CISS_INQUIRY;
885 c->Request.CDB[4] = size & 0xFF;
886 break;
887 case CISS_REPORT_LOG:
888 /* Talking to controller so It's a physical command
889 mode = 00 target = 0.
890 So we have nothing to write.
891 */
892 c->Request.CDBLen = 12;
893 c->Request.Type.Type = TYPE_CMD; // It is a command.
894 c->Request.Type.Attribute = ATTR_SIMPLE;
895 c->Request.Type.Direction = XFER_READ; // Read
896 c->Request.Timeout = 0; // Don't time out
897 c->Request.CDB[0] = CISS_REPORT_LOG;
898 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
899 c->Request.CDB[7] = (size >> 16) & 0xFF;
900 c->Request.CDB[8] = (size >> 8) & 0xFF;
901 c->Request.CDB[9] = size & 0xFF;
902 break;
903
904 case CCISS_READ_CAPACITY:
905 c->Header.LUN.LogDev.VolId=
906 hba[ctlr]->drv[log_unit].LunID;
907 c->Header.LUN.LogDev.Mode = 1;
908 c->Request.CDBLen = 10;
909 c->Request.Type.Type = TYPE_CMD; // It is a command.
910 c->Request.Type.Attribute = ATTR_SIMPLE;
911 c->Request.Type.Direction = XFER_READ; // Read
912 c->Request.Timeout = 0; // Don't time out
913 c->Request.CDB[0] = CCISS_READ_CAPACITY;
914 break;
915 default:
916 printk(KERN_WARNING
917 "cciss: Unknown Command 0x%c sent attempted\n",
918 cmd);
919 cmd_free(info_p, c);
920 return(IO_ERROR);
921 };
922 // Fill in the scatter gather information
923 if (size > 0 )
924 {
925 temp64.val = (__u64) virt_to_bus(buff);
926 c->SG[0].Addr.lower = temp64.val32.lower;
927 c->SG[0].Addr.upper = temp64.val32.upper;
928 c->SG[0].Len = size;
929 c->SG[0].Ext = 0; // we are not chaining
930 }
931 /*
932 * Disable interrupt
933 */
934 #ifdef CCISS_DEBUG
935 printk(KERN_DEBUG "cciss: turning intr off\n");
936 #endif /* CCISS_DEBUG */
937 info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
938
939 /* Make sure there is room in the command FIFO */
940 /* Actually it should be completely empty at this time. */
941 for (i = 200000; i > 0; i--)
942 {
943 /* if fifo isn't full go */
944 if (!(info_p->access.fifo_full(info_p)))
945 {
946
947 break;
948 }
949 udelay(10);
950 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
951 " waiting!\n", ctlr);
952 }
953 /*
954 * Send the cmd
955 */
956 info_p->access.submit_command(info_p, c);
957 complete = pollcomplete(ctlr);
958
959 #ifdef CCISS_DEBUG
960 printk(KERN_DEBUG "cciss: command completed\n");
961 #endif /* CCISS_DEBUG */
962
963 if (complete != 1) {
964 if ( (complete & CISS_ERROR_BIT)
965 && (complete & ~CISS_ERROR_BIT) == c->busaddr)
966 {
967 /* if data overrun or underun on Report command
968 ignore it
969 */
970 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
971 (c->Request.CDB[0] == CISS_INQUIRY)) &&
972 ((c->err_info->CommandStatus ==
973 CMD_DATA_OVERRUN) ||
974 (c->err_info->CommandStatus ==
975 CMD_DATA_UNDERRUN)
976 ))
977 {
978 complete = c->busaddr;
979 } else
980 {
981 printk(KERN_WARNING "ciss ciss%d: sendcmd"
982 " Error %x \n", ctlr,
983 c->err_info->CommandStatus);
984 printk(KERN_WARNING "ciss ciss%d: sendcmd"
985 " offensive info\n"
986 " size %x\n num %x value %x\n", ctlr,
987 c->err_info->MoreErrInfo.Invalid_Cmd.offense_size,
988 c->err_info->MoreErrInfo.Invalid_Cmd.offense_num,
989 c->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
990 cmd_free(info_p,c);
991 return(IO_ERROR);
992 }
993 }
994 if (complete != c->busaddr) {
995 printk( KERN_WARNING "cciss cciss%d: SendCmd "
996 "Invalid command list address returned! (%lx)\n",
997 ctlr, complete);
998 cmd_free(info_p, c);
999 return (IO_ERROR);
1000 }
1001 } else {
1002 printk( KERN_WARNING
1003 "cciss cciss%d: SendCmd Timeout out, "
1004 "No command list address returned!\n",
1005 ctlr);
1006 cmd_free(info_p, c);
1007 return (IO_ERROR);
1008 }
1009 cmd_free(info_p, c);
1010 return (IO_OK);
1011 }
1012 /*
1013 * Map (physical) PCI mem into (virtual) kernel space
1014 */
1015 static ulong remap_pci_mem(ulong base, ulong size)
1016 {
1017 ulong page_base = ((ulong) base) & PAGE_MASK;
1018 ulong page_offs = ((ulong) base) - page_base;
1019 ulong page_remapped = (ulong) ioremap(page_base, page_offs+size);
1020
1021 return (ulong) (page_remapped ? (page_remapped + page_offs) : 0UL);
1022 }
1023
1024 /*
1025 * Enqueuing and dequeuing functions for cmdlists.
1026 */
1027 static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c)
1028 {
1029 if (*Qptr == NULL) {
1030 *Qptr = c;
1031 c->next = c->prev = c;
1032 } else {
1033 c->prev = (*Qptr)->prev;
1034 c->next = (*Qptr);
1035 (*Qptr)->prev->next = c;
1036 (*Qptr)->prev = c;
1037 }
1038 }
1039
1040 static inline CommandList_struct *removeQ(CommandList_struct **Qptr,
1041 CommandList_struct *c)
1042 {
1043 if (c && c->next != c) {
1044 if (*Qptr == c) *Qptr = c->next;
1045 c->prev->next = c->next;
1046 c->next->prev = c->prev;
1047 } else {
1048 *Qptr = NULL;
1049 }
1050 return c;
1051 }
1052
1053 /*
1054 * Takes jobs of the Q and sends them to the hardware, then puts it on
1055 * the Q to wait for completion.
1056 */
1057 static void start_io( ctlr_info_t *h)
1058 {
1059 CommandList_struct *c;
1060
1061 while(( c = h->reqQ) != NULL )
1062 {
1063 /* can't do anything if fifo is full */
1064 if ((h->access.fifo_full(h)))
1065 {
1066 printk(KERN_WARNING "cciss: fifo full \n");
1067 return;
1068 }
1069 /* Get the frist entry from the Request Q */
1070 removeQ(&(h->reqQ), c);
1071 h->Qdepth--;
1072
1073 /* Tell the controller execute command */
1074 h->access.submit_command(h, c);
1075
1076 /* Put job onto the completed Q */
1077 addQ (&(h->cmpQ), c);
1078 }
1079 }
1080
1081 static inline void complete_buffers( struct buffer_head *bh, int status)
1082 {
1083 struct buffer_head *xbh;
1084
1085 while(bh)
1086 {
1087 xbh = bh->b_reqnext;
1088 bh->b_reqnext = NULL;
1089 blk_finished_io(bh->b_size >> 9);
1090 bh->b_end_io(bh, status);
1091 bh = xbh;
1092 }
1093 }
1094 /* checks the status of the job and calls complete buffers to mark all
1095 * buffers for the completed job.
1096 */
1097 static inline void complete_command( CommandList_struct *cmd, int timeout)
1098 {
1099 int status = 1;
1100
1101 if (timeout)
1102 status = 0;
1103 if(cmd->err_info->CommandStatus != 0)
1104 { /* an error has occured */
1105 switch(cmd->err_info->CommandStatus)
1106 {
1107 case CMD_TARGET_STATUS:
1108 printk(KERN_WARNING "cciss: cmd %p has "
1109 " completed with errors\n", cmd);
1110 if( cmd->err_info->ScsiStatus)
1111 {
1112 printk(KERN_WARNING "cciss: cmd %p "
1113 "has SCSI Status = %x\n",
1114 cmd,
1115 cmd->err_info->ScsiStatus);
1116 }
1117
1118 break;
1119 case CMD_DATA_UNDERRUN:
1120 printk(KERN_WARNING "cciss: cmd %p has"
1121 " completed with data underrun "
1122 "reported\n", cmd);
1123 break;
1124 case CMD_DATA_OVERRUN:
1125 printk(KERN_WARNING "cciss: cmd %p has"
1126 " completed with data overrun "
1127 "reported\n", cmd);
1128 break;
1129 case CMD_INVALID:
1130 printk(KERN_WARNING "cciss: cmd %p is "
1131 "reported invalid\n", cmd);
1132 status = 0;
1133 break;
1134 case CMD_PROTOCOL_ERR:
1135 printk(KERN_WARNING "cciss: cmd %p has "
1136 "protocol error \n", cmd);
1137 status = 0;
1138 break;
1139 case CMD_HARDWARE_ERR:
1140 printk(KERN_WARNING "cciss: cmd %p had "
1141 " hardware error\n", cmd);
1142 status = 0;
1143 break;
1144 case CMD_CONNECTION_LOST:
1145 printk(KERN_WARNING "cciss: cmd %p had "
1146 "connection lost\n", cmd);
1147 status=0;
1148 break;
1149 case CMD_ABORTED:
1150 printk(KERN_WARNING "cciss: cmd %p was "
1151 "aborted\n", cmd);
1152 status=0;
1153 break;
1154 case CMD_ABORT_FAILED:
1155 printk(KERN_WARNING "cciss: cmd %p reports "
1156 "abort failed\n", cmd);
1157 status=0;
1158 break;
1159 case CMD_UNSOLICITED_ABORT:
1160 printk(KERN_WARNING "cciss: cmd %p aborted "
1161 "do to an unsolicited abort\n", cmd);
1162 status=0;
1163 break;
1164 case CMD_TIMEOUT:
1165 printk(KERN_WARNING "cciss: cmd %p timedout\n",
1166 cmd);
1167 status=0;
1168 break;
1169 default:
1170 printk(KERN_WARNING "cciss: cmd %p returned "
1171 "unknown status %x\n", cmd,
1172 cmd->err_info->CommandStatus);
1173 status=0;
1174 }
1175 }
1176 complete_buffers(cmd->bh, status);
1177 }
1178 /*
1179 * Get a request and submit it to the controller.
1180 * Currently we do one request at a time. Ideally we would like to send
1181 * everything to the controller on the first call, but there is a danger
1182 * of holding the io_request_lock for to long.
1183 */
1184 static void do_cciss_request(int ctlr)
1185 {
1186 ctlr_info_t *h= hba[ctlr];
1187 CommandList_struct *c;
1188 int log_unit, start_blk, seg, sect;
1189 char *lastdataend;
1190 struct buffer_head *bh;
1191 struct list_head *queue_head;
1192 struct request *creq;
1193 u64bit temp64;
1194
1195 queue_head = &blk_dev[MAJOR_NR+ctlr].request_queue.queue_head;
1196 if (list_empty(queue_head))
1197 {
1198 /* nothing to do... */
1199 start_io(h);
1200 return;
1201 }
1202 creq = blkdev_entry_next_request(queue_head);
1203 if ((creq == NULL) || (creq->rq_status == RQ_INACTIVE))
1204 {
1205 /* nothing to do... restart processing and return */
1206 start_io(h);
1207 return;
1208 }
1209 if ((ctlr != (MAJOR(creq->rq_dev)-MAJOR_NR)) || (ctlr > nr_ctlr)
1210 || (h == NULL))
1211 {
1212 #ifdef CCISS_DEBUG
1213 printk(KERN_WARNING "cciss: doreq cmd of %d, %x at %p\n",
1214 ctlr, creq->rq_dev, creq);
1215 #endif /* CCISS_DEBUG */
1216 complete_buffers(creq->bh, 0);
1217 start_io(h);
1218 return;
1219 }
1220 if (( c = cmd_alloc(h)) == NULL)
1221 {
1222 start_io(h);
1223 return;
1224 }
1225 c->cmd_type = CMD_RWREQ;
1226 bh = c->bh = creq->bh;
1227
1228 /* fill in the request */
1229 log_unit = MINOR(creq->rq_dev) >> NWD_SHIFT;
1230 c->Header.ReplyQueue = 0; // unused in simple mode
1231 c->Header.Tag.lower = c->busaddr; // use the physical address the cmd block for tag
1232 c->Header.LUN.LogDev.VolId= hba[ctlr]->drv[log_unit].LunID;
1233 c->Header.LUN.LogDev.Mode = 1;
1234 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
1235 c->Request.Type.Type = TYPE_CMD; // It is a command.
1236 c->Request.Type.Attribute = ATTR_SIMPLE;
1237 c->Request.Type.Direction =
1238 (creq->cmd == READ) ? XFER_READ: XFER_WRITE;
1239 c->Request.Timeout = 0; // Don't time out
1240 c->Request.CDB[0] = (creq->cmd == READ) ? CCISS_READ : CCISS_WRITE;
1241 start_blk = hba[ctlr]->hd[MINOR(creq->rq_dev)].start_sect + creq->sector;
1242 if (bh == NULL)
1243 panic("cciss: bh== NULL?");
1244 #ifdef CCISS_DEBUG
1245 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",(int) creq->sector,
1246 (int) creq->nr_sectors);
1247 #endif /* CCISS_DEBUG */
1248 seg = 0;
1249 lastdataend = NULL;
1250 sect = 0;
1251 while(bh)
1252 {
1253 sect += bh->b_size/512;
1254 if (bh->b_size % 512)
1255 {
1256 printk(KERN_CRIT "cciss: Oh Man. %d+%d, size=%d\n",
1257 (int) creq->sector, sect, (int) bh->b_size);
1258 panic("b_size 512 != 0\n");
1259 }
1260 if (bh->b_data == lastdataend)
1261 { // tack it on to the last segment
1262 c->SG[seg-1].Len +=bh->b_size;
1263 lastdataend += bh->b_size;
1264 } else
1265 {
1266 c->SG[seg].Len = bh->b_size;
1267 temp64.val = (__u64) virt_to_bus(bh->b_data);
1268 c->SG[seg].Addr.lower = temp64.val32.lower;
1269 c->SG[seg].Addr.upper = temp64.val32.upper;
1270 c->SG[0].Ext = 0; // we are not chaining
1271 lastdataend = bh->b_data + bh->b_size;
1272 if( ++seg == MAXSGENTRIES)
1273 {
1274 break;
1275 }
1276 }
1277 bh = bh->b_reqnext;
1278 }
1279 /* track how many SG entries we are using */
1280 if( seg > h->maxSG)
1281 h->maxSG = seg;
1282
1283 /* adjusting the remaining request, if any */
1284 creq-> sector+= sect;
1285 creq->nr_sectors -= sect;
1286
1287 #ifdef CCISS_DEBUG
1288 printk(KERN_DEBUG "cciss: Submitting %d sectors in %d segments\n", sect, seg);
1289 #endif /* CCISS_DEBUG */
1290
1291 c->Header.SGList = c->Header.SGTotal = seg;
1292 c->Request.CDB[1]= 0;
1293 c->Request.CDB[2]= (start_blk >> 24) & 0xff; //MSB
1294 c->Request.CDB[3]= (start_blk >> 16) & 0xff;
1295 c->Request.CDB[4]= (start_blk >> 8) & 0xff;
1296 c->Request.CDB[5]= start_blk & 0xff;
1297 c->Request.CDB[6]= 0; // (sect >> 24) & 0xff; MSB
1298 // c->Request.CDB[7]= (sect >> 16) & 0xff;
1299 c->Request.CDB[7]= (sect >> 8) & 0xff;
1300 c->Request.CDB[8]= sect & 0xff;
1301 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
1302
1303 /* check to see if we going to complete the entire request */
1304 /* if so, mark this request as Done and ready the next one */
1305 if (creq->nr_sectors)
1306 {
1307 #ifdef CCISS_DEBUG
1308 printk(KERN_DEBUG "cciss: More to do on the same request %p %ld\n",
1309 creq, creq->nr_sectors);
1310 #endif /* CCISS_DEBUG */
1311
1312 creq->bh = bh->b_reqnext;
1313 bh->b_reqnext = NULL;
1314 } else
1315 {
1316 #ifdef CCISS_DEBUG
1317 printk("cciss: Done with %p, queueing %p\n", creq);
1318 #endif /* CCISS_DEBUG */
1319
1320 blkdev_dequeue_request(creq);
1321 end_that_request_last(creq);
1322 }
1323 addQ(&(h->reqQ),c);
1324 h->Qdepth++;
1325 if(h->Qdepth > h->maxQsinceinit)
1326 h->maxQsinceinit = h->Qdepth;
1327 start_io(h);
1328 }
1329
1330 static void do_cciss_intr(int irq, void *dev_id, struct pt_regs *regs)
1331 {
1332 ctlr_info_t *h = dev_id;
1333 CommandList_struct *c;
1334 unsigned long flags;
1335 __u32 a, a1;
1336
1337
1338 /* Is this interrupt for us? */
1339 if ( h->access.intr_pending(h) == 0)
1340 return;
1341
1342 /*
1343 * If there are completed commands in the completion queue,
1344 * we had better do something about it.
1345 */
1346 spin_lock_irqsave(&io_request_lock, flags);
1347 while( h->access.intr_pending(h))
1348 {
1349 while((a = h->access.command_completed(h)) != FIFO_EMPTY)
1350 {
1351 a1 = a;
1352 a &= ~3;
1353 if ((c = h->cmpQ) == NULL)
1354 {
1355 printk(KERN_WARNING "cpqarray: Completion of %08lx ignored\n", (unsigned long)a1);
1356 continue;
1357 }
1358 while(c->busaddr != a) {
1359 c = c->next;
1360 if (c == h->cmpQ)
1361 break;
1362 }
1363 /*
1364 * If we've found the command, take it off the
1365 * completion Q and free it
1366 */
1367 if (c->busaddr == a) {
1368 removeQ(&h->cmpQ, c);
1369 if (c->cmd_type == CMD_RWREQ) {
1370 complete_command(c, 0);
1371 cmd_free(h, c);
1372 } else if (c->cmd_type == CMD_IOCTL_PEND) {
1373 c->cmd_type = CMD_IOCTL_DONE;
1374 }
1375 continue;
1376 }
1377 }
1378 }
1379 /*
1380 * See if we can queue up some more IO
1381 */
1382 do_cciss_request(h->ctlr);
1383 spin_unlock_irqrestore(&io_request_lock, flags);
1384 }
1385 /*
1386 * We cannot read the structure directly, for portablity we must use
1387 * the io functions.
1388 * This is for debug only.
1389 */
1390 #ifdef CCISS_DEBUG
1391 static void print_cfg_table( CfgTable_struct *tb)
1392 {
1393 int i;
1394 char temp_name[17];
1395
1396 printk("Controller Configuration information\n");
1397 printk("------------------------------------\n");
1398 for(i=0;i<4;i++)
1399 temp_name[i] = readb(&(tb->Signature[i]));
1400 temp_name[4]='\0';
1401 printk(" Signature = %s\n", temp_name);
1402 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
1403 printk(" Transport methods supported = 0x%x\n",
1404 readl(&(tb-> TransportSupport)));
1405 printk(" Transport methods active = 0x%x\n",
1406 readl(&(tb->TransportActive)));
1407 printk(" Requested transport Method = 0x%x\n",
1408 readl(&(tb->HostWrite.TransportRequest)));
1409 printk(" Coalese Interrupt Delay = 0x%x\n",
1410 readl(&(tb->HostWrite.CoalIntDelay)));
1411 printk(" Coalese Interrupt Count = 0x%x\n",
1412 readl(&(tb->HostWrite.CoalIntCount)));
1413 printk(" Max outstanding commands = 0x%d\n",
1414 readl(&(tb->CmdsOutMax)));
1415 printk(" Bus Types = 0x%x\n", readl(&(tb-> BusTypes)));
1416 for(i=0;i<16;i++)
1417 temp_name[i] = readb(&(tb->ServerName[i]));
1418 temp_name[16] = '\0';
1419 printk(" Server Name = %s\n", temp_name);
1420 printk(" Heartbeat Counter = 0x%x\n\n\n",
1421 readl(&(tb->HeartBeat)));
1422 }
1423 #endif /* CCISS_DEBUG */
1424
1425 static int cciss_pci_init(ctlr_info_t *c, unchar bus, unchar device_fn)
1426 {
1427 ushort vendor_id, device_id, command;
1428 unchar cache_line_size, latency_timer;
1429 unchar irq, revision;
1430 uint addr[6];
1431 __u32 board_id;
1432 struct pci_dev *pdev;
1433
1434 int i;
1435
1436 pdev = pci_find_slot(bus, device_fn);
1437 vendor_id = pdev->vendor;
1438 device_id = pdev->device;
1439 irq = pdev->irq;
1440
1441 for(i=0; i<6; i++)
1442 addr[i] = pdev->resource[i].start;
1443
1444 if (pci_enable_device(pdev))
1445 return( -1);
1446
1447 (void) pci_read_config_word(pdev, PCI_COMMAND,&command);
1448 (void) pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1449 (void) pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE,
1450 &cache_line_size);
1451 (void) pci_read_config_byte(pdev, PCI_LATENCY_TIMER,
1452 &latency_timer);
1453
1454 (void) pci_read_config_dword(pdev, PCI_SUBSYSTEM_VENDOR_ID,
1455 &board_id);
1456
1457 #ifdef CCISS_DEBUG
1458 printk("vendor_id = %x\n", vendor_id);
1459 printk("device_id = %x\n", device_id);
1460 printk("command = %x\n", command);
1461 for(i=0; i<6; i++)
1462 printk("addr[%d] = %x\n", i, addr[i]);
1463 printk("revision = %x\n", revision);
1464 printk("irq = %x\n", irq);
1465 printk("cache_line_size = %x\n", cache_line_size);
1466 printk("latency_timer = %x\n", latency_timer);
1467 printk("board_id = %x\n", board_id);
1468 #endif /* CCISS_DEBUG */
1469
1470 c->intr = irq;
1471
1472 /*
1473 * Memory base addr is first addr , the second points to the config
1474 * table
1475 */
1476 c->paddr = pci_resource_start(pdev, 0);
1477 c->vaddr = remap_pci_mem(c->paddr, 128);
1478 c->cfgtable = (CfgTable_struct *) remap_pci_mem(addr[1],
1479 sizeof(CfgTable_struct));
1480 c->board_id = board_id;
1481
1482 #ifdef CCISS_DEBUG
1483 print_cfg_table(c->cfgtable);
1484 #endif /* CCISS_DEBUG */
1485 for(i=0; i<NR_PRODUCTS; i++) {
1486 if (board_id == products[i].board_id) {
1487 c->product_name = products[i].product_name;
1488 c->access = *(products[i].access);
1489 break;
1490 }
1491 }
1492 if (i == NR_PRODUCTS) {
1493 printk(KERN_WARNING "cciss: Sorry, I don't know how"
1494 " to access the Smart Array controller %08lx\n",
1495 (unsigned long)board_id);
1496 return -1;
1497 }
1498 #ifdef CCISS_DEBUG
1499 printk("Trying to put board into Simple mode\n");
1500 #endif /* CCISS_DEBUG */
1501 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
1502 /* Update the field, and then ring the doorbell */
1503 writel( CFGTBL_Trans_Simple,
1504 &(c->cfgtable->HostWrite.TransportRequest));
1505 writel( CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1506
1507 for(i=0;i<MAX_CONFIG_WAIT;i++)
1508 {
1509 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
1510 break;
1511 /* delay and try again */
1512 udelay(1000);
1513 }
1514
1515 #ifdef CCISS_DEBUG
1516 printk(KERN_DEBUG "I counter got to %d %x\n", i, readl(c->vaddr + SA5_DOORBELL));
1517 #endif /* CCISS_DEBUG */
1518 #ifdef CCISS_DEBUG
1519 print_cfg_table(c->cfgtable);
1520 #endif /* CCISS_DEBUG */
1521
1522 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
1523 {
1524 printk(KERN_WARNING "cciss: unable to get board into"
1525 " simple mode\n");
1526 return -1;
1527 }
1528 return 0;
1529
1530 }
1531 /*
1532 * Scans PCI space for any controllers that this driver can control.
1533 */
1534 static int cciss_pci_detect(void)
1535 {
1536
1537 int index;
1538 unchar bus=0, dev_fn=0;
1539
1540 for(index=0; ; index++) {
1541 if (pcibios_find_device(PCI_VENDOR_ID_COMPAQ,
1542 PCI_DEVICE_ID_COMPAQ_CISS,
1543 index, &bus, &dev_fn))
1544 break;
1545 printk(KERN_DEBUG "cciss: Device %x has been found at %x %x\n",
1546 PCI_DEVICE_ID_COMPAQ_CISS, bus, dev_fn);
1547 if (index == 1000000) break;
1548 if (nr_ctlr == 8) {
1549 printk(KERN_WARNING "cciss: This driver"
1550 " supports a maximum of 8 controllers.\n");
1551 break;
1552 }
1553 hba[nr_ctlr] = kmalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1554 if(hba[nr_ctlr]==NULL)
1555 {
1556 printk(KERN_ERR "cciss: out of memory.\n");
1557 continue;
1558 }
1559 memset(hba[nr_ctlr], 0, sizeof(ctlr_info_t));
1560 if (cciss_pci_init(hba[nr_ctlr], bus, dev_fn) != 0)
1561 {
1562 kfree(hba[nr_ctlr]);
1563 continue;
1564 }
1565 sprintf(hba[nr_ctlr]->devname, "cciss%d", nr_ctlr);
1566 hba[nr_ctlr]->ctlr = nr_ctlr;
1567 hba[nr_ctlr]->pci_bus = bus;
1568 hba[nr_ctlr]->pci_dev_fn = dev_fn;
1569 nr_ctlr++;
1570
1571 }
1572 return nr_ctlr;
1573
1574 }
1575
1576 /*
1577 * Gets information about the local volumes attached to the controller.
1578 */
1579 static void cciss_getgeometry(int cntl_num)
1580 {
1581 ReportLunData_struct *ld_buff;
1582 ReadCapdata_struct *size_buff;
1583 InquiryData_struct *inq_buff;
1584 int return_code;
1585 int i;
1586 int listlength = 0;
1587 int lunid = 0;
1588 int block_size;
1589 int total_size;
1590
1591 ld_buff = kmalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1592 if (ld_buff == NULL)
1593 {
1594 printk(KERN_ERR "cciss: out of memory\n");
1595 return;
1596 }
1597 memset(ld_buff, 0, sizeof(ReportLunData_struct));
1598 size_buff = kmalloc(sizeof( ReadCapdata_struct), GFP_KERNEL);
1599 if (size_buff == NULL)
1600 {
1601 printk(KERN_ERR "cciss: out of memory\n");
1602 kfree(ld_buff);
1603 return;
1604 }
1605 inq_buff = kmalloc(sizeof( InquiryData_struct), GFP_KERNEL);
1606 if (inq_buff == NULL)
1607 {
1608 printk(KERN_ERR "cciss: out of memory\n");
1609 kfree(ld_buff);
1610 kfree(size_buff);
1611 return;
1612 }
1613 /* Get the firmware version */
1614 return_code = sendcmd(CISS_INQUIRY, cntl_num, inq_buff,
1615 sizeof(InquiryData_struct), 0, 0 ,0 );
1616 if (return_code == IO_OK)
1617 {
1618 hba[cntl_num]->firm_ver[0] = inq_buff->data_byte[32];
1619 hba[cntl_num]->firm_ver[1] = inq_buff->data_byte[33];
1620 hba[cntl_num]->firm_ver[2] = inq_buff->data_byte[34];
1621 hba[cntl_num]->firm_ver[3] = inq_buff->data_byte[35];
1622 } else /* send command failed */
1623 {
1624 printk(KERN_WARNING "cciss: unable to determine firmware"
1625 " version of controller\n");
1626 }
1627 /* Get the number of logical volumes */
1628 return_code = sendcmd(CISS_REPORT_LOG, cntl_num, ld_buff,
1629 sizeof(ReportLunData_struct), 0, 0, 0 );
1630
1631 if( return_code == IO_OK)
1632 {
1633 #ifdef CCISS_DEBUG
1634 printk("LUN Data\n--------------------------\n");
1635 #endif /* CCISS_DEBUG */
1636
1637 listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[0])) << 24;
1638 listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[1])) << 16;
1639 listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[2])) << 8;
1640 listlength |= 0xff & (unsigned int)(ld_buff->LUNListLength[3]);
1641 } else /* reading number of logical volumes failed */
1642 {
1643 printk(KERN_WARNING "cciss: report logical volume"
1644 " command failed\n");
1645 listlength = 0;
1646 }
1647 hba[cntl_num]->num_luns = listlength / 8; // 8 bytes pre entry
1648 if (hba[cntl_num]->num_luns > CISS_MAX_LUN)
1649 {
1650 printk(KERN_ERR "ciss: only %d number of logical volumes supported\n",
1651 CISS_MAX_LUN);
1652 hba[cntl_num]->num_luns = CISS_MAX_LUN;
1653 }
1654 #ifdef CCISS_DEBUG
1655 printk(KERN_DEBUG "Length = %x %x %x %x = %d\n", ld_buff->LUNListLength[0],
1656 ld_buff->LUNListLength[1], ld_buff->LUNListLength[2],
1657 ld_buff->LUNListLength[3], hba[cntl_num]->num_luns);
1658 #endif /* CCISS_DEBUG */
1659 for(i=0; i< hba[cntl_num]->num_luns ; i++)
1660 {
1661 lunid = (0xff & (unsigned int)(ld_buff->LUN[i][3])) << 24;
1662 lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][2])) << 16;
1663 lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][1])) << 8;
1664 lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);
1665 hba[cntl_num]->drv[i].LunID = lunid;
1666
1667 #ifdef CCISS_DEBUG
1668 printk(KERN_DEBUG "LUN[%d]: %x %x %x %x = %x\n", i,
1669 ld_buff->LUN[i][0], ld_buff->LUN[i][1],ld_buff->LUN[i][2],
1670 ld_buff->LUN[i][3], hba[cntl_num]->drv[i].LunID);
1671 #endif /* CCISS_DEBUG */
1672
1673 memset(size_buff, 0, sizeof(ReadCapdata_struct));
1674 return_code = sendcmd(CCISS_READ_CAPACITY, cntl_num, size_buff,
1675 sizeof( ReadCapdata_struct), 1, i, 0 );
1676 if (return_code == IO_OK)
1677 {
1678 total_size = (0xff &
1679 (unsigned int)(size_buff->total_size[0])) << 24;
1680 total_size |= (0xff &
1681 (unsigned int)(size_buff->total_size[1])) << 16;
1682 total_size |= (0xff &
1683 (unsigned int)(size_buff->total_size[2])) << 8;
1684 total_size |= (0xff & (unsigned int)
1685 (size_buff->total_size[3]));
1686 total_size++; // command returns highest block address
1687
1688 block_size = (0xff &
1689 (unsigned int)(size_buff->block_size[0])) << 24;
1690 block_size |= (0xff &
1691 (unsigned int)(size_buff->block_size[1])) << 16;
1692 block_size |= (0xff &
1693 (unsigned int)(size_buff->block_size[2])) << 8;
1694 block_size |= (0xff &
1695 (unsigned int)(size_buff->block_size[3]));
1696 } else /* read capacity command failed */
1697 {
1698 printk(KERN_WARNING "cciss: read capacity failed\n");
1699 total_size = block_size = 0;
1700 }
1701 printk(" blocks= %d block_size= %d\n", total_size,
1702 block_size);
1703
1704 /* Execute the command to read the disk geometry */
1705 memset(inq_buff, 0, sizeof(InquiryData_struct));
1706 return_code = sendcmd(CISS_INQUIRY, cntl_num, inq_buff,
1707 sizeof(InquiryData_struct), 1, i ,0xC1 );
1708 if (return_code == IO_OK)
1709 {
1710 if(inq_buff->data_byte[8] == 0xFF)
1711 {
1712 printk(KERN_WARNING "cciss: reading geometry failed, volume does not support reading geometry\n");
1713
1714 hba[cntl_num]->drv[i].block_size = block_size;
1715 hba[cntl_num]->drv[i].nr_blocks = total_size;
1716 hba[cntl_num]->drv[i].heads = 255;
1717 hba[cntl_num]->drv[i].sectors = 32; // Sectors per track
1718 hba[cntl_num]->drv[i].cylinders = total_size / 255 / 32; } else
1719 {
1720
1721 hba[cntl_num]->drv[i].block_size = block_size;
1722 hba[cntl_num]->drv[i].nr_blocks = total_size;
1723 hba[cntl_num]->drv[i].heads =
1724 inq_buff->data_byte[6];
1725 hba[cntl_num]->drv[i].sectors =
1726 inq_buff->data_byte[7];
1727 hba[cntl_num]->drv[i].cylinders =
1728 (inq_buff->data_byte[4] & 0xff) << 8;
1729 hba[cntl_num]->drv[i].cylinders +=
1730 inq_buff->data_byte[5];
1731 }
1732 }
1733 else /* Get geometry failed */
1734 {
1735 printk(KERN_WARNING "cciss: reading geometry failed, continuing with default geometry\n");
1736
1737 hba[cntl_num]->drv[i].block_size = block_size;
1738 hba[cntl_num]->drv[i].nr_blocks = total_size;
1739 hba[cntl_num]->drv[i].heads = 255;
1740 hba[cntl_num]->drv[i].sectors = 32; // Sectors per track
1741 hba[cntl_num]->drv[i].cylinders = total_size / 255 / 32;
1742 }
1743 printk(KERN_INFO " heads= %d, sectors= %d, cylinders= %d\n\n",
1744 hba[cntl_num]->drv[i].heads,
1745 hba[cntl_num]->drv[i].sectors,
1746 hba[cntl_num]->drv[i].cylinders);
1747
1748 }
1749 kfree(ld_buff);
1750 kfree(size_buff);
1751 }
1752
1753 /*
1754 * This is it. Find all the controllers and register them. I really hate
1755 * stealing all these major device numbers.
1756 * returns the number of block devices registered.
1757 */
1758 int __init cciss_init(void)
1759 {
1760 int num_cntlrs_reg = 0;
1761 int i,j;
1762
1763 void (*request_fns[MAX_CTLR])(request_queue_t *) = {
1764 do_cciss_request0, do_cciss_request1,
1765 do_cciss_request2, do_cciss_request3,
1766 do_cciss_request4, do_cciss_request5,
1767 do_cciss_request6, do_cciss_request7,
1768 };
1769
1770 /* detect controllers */
1771 cciss_pci_detect();
1772
1773 if (nr_ctlr == 0)
1774 return(num_cntlrs_reg);
1775
1776 printk(KERN_INFO DRIVER_NAME "\n");
1777 printk(KERN_INFO "Found %d controller(s)\n", nr_ctlr);
1778 for(i=0;i<nr_ctlr;i++)
1779 {
1780 if( register_blkdev(MAJOR_NR+i, hba[i]->devname, &cciss_fops))
1781 {
1782 printk(KERN_ERR "cciss: Unable to get major number "
1783 "%d for %s\n", MAJOR_NR+i, hba[i]->devname);
1784 continue;
1785 }
1786 /* make sure the board interrupts are off */
1787 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
1788 if( request_irq(hba[i]->intr, do_cciss_intr, SA_INTERRUPT|SA_SHIRQ, hba[i]->devname, hba[i]))
1789 {
1790 printk(KERN_ERR "ciss: Unable to get irq %d for %s\n",
1791 hba[i]->intr, hba[i]->devname);
1792 unregister_blkdev( MAJOR_NR+i, hba[i]->devname);
1793 continue;
1794 }
1795 num_cntlrs_reg++;
1796 hba[i]->cmd_pool_bits = (__u32*)kmalloc(
1797 ((NR_CMDS+31)/32)*sizeof(__u32), GFP_KERNEL);
1798 hba[i]->cmd_pool = (CommandList_struct *)kmalloc(
1799 NR_CMDS * sizeof(CommandList_struct),
1800 GFP_KERNEL);
1801 hba[i]->errinfo_pool = (ErrorInfo_struct *)kmalloc(
1802 NR_CMDS * sizeof( ErrorInfo_struct),
1803 GFP_KERNEL);
1804 if((hba[i]->cmd_pool_bits == NULL)
1805 || (hba[i]->cmd_pool == NULL)
1806 || (hba[i]->errinfo_pool == NULL))
1807 {
1808 nr_ctlr = i;
1809 if(hba[i]->cmd_pool_bits)
1810 kfree(hba[i]->cmd_pool_bits);
1811 if(hba[i]->cmd_pool)
1812 kfree(hba[i]->cmd_pool);
1813 if(hba[i]->errinfo_pool)
1814 kfree(hba[i]->errinfo_pool);
1815 free_irq(hba[i]->intr, hba[i]);
1816 unregister_blkdev(MAJOR_NR+i, hba[i]->devname);
1817 num_cntlrs_reg--;
1818 printk( KERN_ERR "cciss: out of memory");
1819 return(num_cntlrs_reg);
1820 }
1821
1822 /* command and error info recs zeroed out before
1823 they are used */
1824 memset(hba[i]->cmd_pool_bits, 0,
1825 ((NR_CMDS+31)/32)*sizeof(__u32));
1826
1827 #ifdef CCISS_DEBUG
1828 printk(KERN_DEBUG "Scanning for drives on controller cciss%d\n",i);
1829 #endif /* CCISS_DEBUG */
1830
1831 cciss_getgeometry(i);
1832
1833 /* Turn the interrupts on so we can service requests */
1834 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
1835
1836 cciss_procinit(i);
1837
1838 blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR+i),
1839 request_fns[i]);
1840 blk_queue_headactive(BLK_DEFAULT_QUEUE(MAJOR_NR+i), 0);
1841
1842 /* fill in the other Kernel structs */
1843 blksize_size[MAJOR_NR+i] = hba[i]->blocksizes;
1844 hardsect_size[MAJOR_NR+i] = hba[i]->hardsizes;
1845 read_ahead[MAJOR_NR+i] = READ_AHEAD;
1846
1847 /* Fill in the gendisk data */
1848 hba[i]->gendisk.major = MAJOR_NR + i;
1849 hba[i]->gendisk.major_name = "cciss";
1850 hba[i]->gendisk.minor_shift = NWD_SHIFT;
1851 hba[i]->gendisk.max_p = MAX_PART;
1852 hba[i]->gendisk.part = hba[i]->hd;
1853 hba[i]->gendisk.sizes = hba[i]->sizes;
1854 hba[i]->gendisk.nr_real = hba[i]->num_luns;
1855
1856 /* Get on the disk list */
1857 hba[i]->gendisk.next = gendisk_head;
1858 gendisk_head = &(hba[i]->gendisk);
1859
1860 cciss_geninit(i);
1861 for(j=0; j<NWD; j++)
1862 register_disk(&(hba[i]->gendisk),
1863 MKDEV(MAJOR_NR+i, j <<4),
1864 MAX_PART, &cciss_fops,
1865 hba[i]->drv[j].nr_blocks);
1866 }
1867 return(nr_ctlr);
1868 }
1869
1870 EXPORT_NO_SYMBOLS;
1871
1872 /* This is a bit of a hack... */
1873 static int __init init_cciss_module(void)
1874 {
1875
1876 if (cciss_init() == 0) /* all the block dev numbers already used */
1877 return -EIO; /* or no controllers were found */
1878 return 0;
1879 }
1880
1881 static void __exit cleanup_cciss_module(void)
1882 {
1883 int i;
1884 struct gendisk *g;
1885
1886 for(i=0; i<nr_ctlr; i++)
1887 {
1888 /* Turn board interrupts off */
1889 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
1890 free_irq(hba[i]->intr, hba[i]);
1891 iounmap((void*)hba[i]->vaddr);
1892 unregister_blkdev(MAJOR_NR+i, hba[i]->devname);
1893 remove_proc_entry(hba[i]->devname, proc_cciss);
1894
1895 /* remove it from the disk list */
1896 if (gendisk_head == &(hba[i]->gendisk))
1897 {
1898 gendisk_head = hba[i]->gendisk.next;
1899 } else
1900 {
1901 for(g=gendisk_head; g ; g=g->next)
1902 {
1903 if(g->next == &(hba[i]->gendisk))
1904 {
1905 g->next = hba[i]->gendisk.next;
1906 }
1907 }
1908 }
1909 remove_proc_entry("driver/cciss", &proc_root);
1910 kfree(hba[i]->cmd_pool);
1911 kfree(hba[i]->errinfo_pool);
1912 kfree(hba[i]->cmd_pool_bits);
1913 kfree(hba[i]);
1914 }
1915 }
1916
1917 module_init(init_cciss_module);
1918 module_exit(cleanup_cciss_module);
1919
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