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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / block / cpqarray.c
blob9125bbeacd4dcc6fa49043b7fe795b1c1c78b013
1 /*
2 * Disk Array driver for Compaq SMART2 Controllers
3 * Copyright 1998 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 iss_storagedev@hp.com
20 *
21 */
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/pci.h>
25 #include <linux/bio.h>
26 #include <linux/interrupt.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/blkpg.h>
33 #include <linux/timer.h>
34 #include <linux/proc_fs.h>
35 #include <linux/seq_file.h>
36 #include <linux/init.h>
37 #include <linux/hdreg.h>
38 #include <linux/mutex.h>
39 #include <linux/spinlock.h>
40 #include <linux/blkdev.h>
41 #include <linux/genhd.h>
42 #include <linux/scatterlist.h>
43 #include <asm/uaccess.h>
44 #include <asm/io.h>
45
46
47 #define SMART2_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
48
49 #define DRIVER_NAME "Compaq SMART2 Driver (v 2.6.0)"
50 #define DRIVER_VERSION SMART2_DRIVER_VERSION(2,6,0)
51
52 /* Embedded module documentation macros - see modules.h */
53 /* Original author Chris Frantz - Compaq Computer Corporation */
54 MODULE_AUTHOR("Compaq Computer Corporation");
55 MODULE_DESCRIPTION("Driver for Compaq Smart2 Array Controllers version 2.6.0");
56 MODULE_LICENSE("GPL");
57
58 #include "cpqarray.h"
59 #include "ida_cmd.h"
60 #include "smart1,2.h"
61 #include "ida_ioctl.h"
62
63 #define READ_AHEAD 128
64 #define NR_CMDS 128 /* This could probably go as high as ~400 */
65
66 #define MAX_CTLR 8
67 #define CTLR_SHIFT 8
68
69 #define CPQARRAY_DMA_MASK 0xFFFFFFFF /* 32 bit DMA */
70
71 static DEFINE_MUTEX(cpqarray_mutex);
72 static int nr_ctlr;
73 static ctlr_info_t *hba[MAX_CTLR];
74
75 static int eisa[8];
76
77 #define NR_PRODUCTS ARRAY_SIZE(products)
78
79 /* board_id = Subsystem Device ID & Vendor ID
80 * product = Marketing Name for the board
81 * access = Address of the struct of function pointers
82 */
83 static struct board_type products[] = {
84 { 0x0040110E, "IDA", &smart1_access },
85 { 0x0140110E, "IDA-2", &smart1_access },
86 { 0x1040110E, "IAES", &smart1_access },
87 { 0x2040110E, "SMART", &smart1_access },
88 { 0x3040110E, "SMART-2/E", &smart2e_access },
89 { 0x40300E11, "SMART-2/P", &smart2_access },
90 { 0x40310E11, "SMART-2SL", &smart2_access },
91 { 0x40320E11, "Smart Array 3200", &smart2_access },
92 { 0x40330E11, "Smart Array 3100ES", &smart2_access },
93 { 0x40340E11, "Smart Array 221", &smart2_access },
94 { 0x40400E11, "Integrated Array", &smart4_access },
95 { 0x40480E11, "Compaq Raid LC2", &smart4_access },
96 { 0x40500E11, "Smart Array 4200", &smart4_access },
97 { 0x40510E11, "Smart Array 4250ES", &smart4_access },
98 { 0x40580E11, "Smart Array 431", &smart4_access },
99 };
100
101 /* define the PCI info for the PCI cards this driver can control */
102 static const struct pci_device_id cpqarray_pci_device_id[] =
103 {
104 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
105 0x0E11, 0x4058, 0, 0, 0}, /* SA431 */
106 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
107 0x0E11, 0x4051, 0, 0, 0}, /* SA4250ES */
108 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
109 0x0E11, 0x4050, 0, 0, 0}, /* SA4200 */
110 { PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
111 0x0E11, 0x4048, 0, 0, 0}, /* LC2 */
112 { PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
113 0x0E11, 0x4040, 0, 0, 0}, /* Integrated Array */
114 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
115 0x0E11, 0x4034, 0, 0, 0}, /* SA 221 */
116 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
117 0x0E11, 0x4033, 0, 0, 0}, /* SA 3100ES*/
118 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
119 0x0E11, 0x4032, 0, 0, 0}, /* SA 3200*/
120 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
121 0x0E11, 0x4031, 0, 0, 0}, /* SA 2SL*/
122 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
123 0x0E11, 0x4030, 0, 0, 0}, /* SA 2P */
124 { 0 }
125 };
126
127 MODULE_DEVICE_TABLE(pci, cpqarray_pci_device_id);
128
129 static struct gendisk *ida_gendisk[MAX_CTLR][NWD];
130
131 /* Debug... */
132 #define DBG(s) do { s } while(0)
133 /* Debug (general info)... */
134 #define DBGINFO(s) do { } while(0)
135 /* Debug Paranoid... */
136 #define DBGP(s) do { } while(0)
137 /* Debug Extra Paranoid... */
138 #define DBGPX(s) do { } while(0)
139
140 static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev);
141 static void __iomem *remap_pci_mem(ulong base, ulong size);
142 static int cpqarray_eisa_detect(void);
143 static int pollcomplete(int ctlr);
144 static void getgeometry(int ctlr);
145 static void start_fwbk(int ctlr);
146
147 static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool);
148 static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool);
149
150 static void free_hba(int i);
151 static int alloc_cpqarray_hba(void);
152
153 static int sendcmd(
154 __u8 cmd,
155 int ctlr,
156 void *buff,
157 size_t size,
158 unsigned int blk,
159 unsigned int blkcnt,
160 unsigned int log_unit );
161
162 static int ida_unlocked_open(struct block_device *bdev, fmode_t mode);
163 static int ida_release(struct gendisk *disk, fmode_t mode);
164 static int ida_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg);
165 static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo);
166 static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io);
167
168 static void do_ida_request(struct request_queue *q);
169 static void start_io(ctlr_info_t *h);
170
171 static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
172 static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c);
173 static inline void complete_command(cmdlist_t *cmd, int timeout);
174
175 static irqreturn_t do_ida_intr(int irq, void *dev_id);
176 static void ida_timer(unsigned long tdata);
177 static int ida_revalidate(struct gendisk *disk);
178 static int revalidate_allvol(ctlr_info_t *host);
179 static int cpqarray_register_ctlr(int ctlr, struct pci_dev *pdev);
180
181 #ifdef CONFIG_PROC_FS
182 static void ida_procinit(int i);
183 #else
184 static void ida_procinit(int i) {}
185 #endif
186
187 static inline drv_info_t *get_drv(struct gendisk *disk)
188 {
189 return disk->private_data;
190 }
191
192 static inline ctlr_info_t *get_host(struct gendisk *disk)
193 {
194 return disk->queue->queuedata;
195 }
196
197
198 static const struct block_device_operations ida_fops = {
199 .owner = THIS_MODULE,
200 .open = ida_unlocked_open,
201 .release = ida_release,
202 .ioctl = ida_ioctl,
203 .getgeo = ida_getgeo,
204 .revalidate_disk= ida_revalidate,
205 };
206
207
208 #ifdef CONFIG_PROC_FS
209
210 static struct proc_dir_entry *proc_array;
211 static const struct file_operations ida_proc_fops;
212
213 /*
214 * Get us a file in /proc/array that says something about each controller.
215 * Create /proc/array if it doesn't exist yet.
216 */
217 static void __init ida_procinit(int i)
218 {
219 if (proc_array == NULL) {
220 proc_array = proc_mkdir("driver/cpqarray", NULL);
221 if (!proc_array) return;
222 }
223
224 proc_create_data(hba[i]->devname, 0, proc_array, &ida_proc_fops, hba[i]);
225 }
226
227 /*
228 * Report information about this controller.
229 */
230 static int ida_proc_show(struct seq_file *m, void *v)
231 {
232 int i, ctlr;
233 ctlr_info_t *h = (ctlr_info_t*)m->private;
234 drv_info_t *drv;
235 #ifdef CPQ_PROC_PRINT_QUEUES
236 cmdlist_t *c;
237 unsigned long flags;
238 #endif
239
240 ctlr = h->ctlr;
241 seq_printf(m, "%s: Compaq %s Controller\n"
242 " Board ID: 0x%08lx\n"
243 " Firmware Revision: %c%c%c%c\n"
244 " Controller Sig: 0x%08lx\n"
245 " Memory Address: 0x%08lx\n"
246 " I/O Port: 0x%04x\n"
247 " IRQ: %d\n"
248 " Logical drives: %d\n"
249 " Physical drives: %d\n\n"
250 " Current Q depth: %d\n"
251 " Max Q depth since init: %d\n\n",
252 h->devname,
253 h->product_name,
254 (unsigned long)h->board_id,
255 h->firm_rev[0], h->firm_rev[1], h->firm_rev[2], h->firm_rev[3],
256 (unsigned long)h->ctlr_sig, (unsigned long)h->vaddr,
257 (unsigned int) h->io_mem_addr, (unsigned int)h->intr,
258 h->log_drives, h->phys_drives,
259 h->Qdepth, h->maxQsinceinit);
260
261 seq_puts(m, "Logical Drive Info:\n");
262
263 for(i=0; i<h->log_drives; i++) {
264 drv = &h->drv[i];
265 seq_printf(m, "ida/c%dd%d: blksz=%d nr_blks=%d\n",
266 ctlr, i, drv->blk_size, drv->nr_blks);
267 }
268
269 #ifdef CPQ_PROC_PRINT_QUEUES
270 spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
271 seq_puts(m, "\nCurrent Queues:\n");
272
273 c = h->reqQ;
274 seq_printf(m, "reqQ = %p", c);
275 if (c) c=c->next;
276 while(c && c != h->reqQ) {
277 seq_printf(m, "->%p", c);
278 c=c->next;
279 }
280
281 c = h->cmpQ;
282 seq_printf(m, "\ncmpQ = %p", c);
283 if (c) c=c->next;
284 while(c && c != h->cmpQ) {
285 seq_printf(m, "->%p", c);
286 c=c->next;
287 }
288
289 seq_putc(m, '\n');
290 spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags);
291 #endif
292 seq_printf(m, "nr_allocs = %d\nnr_frees = %d\n",
293 h->nr_allocs, h->nr_frees);
294 return 0;
295 }
296
297 static int ida_proc_open(struct inode *inode, struct file *file)
298 {
299 return single_open(file, ida_proc_show, PDE(inode)->data);
300 }
301
302 static const struct file_operations ida_proc_fops = {
303 .owner = THIS_MODULE,
304 .open = ida_proc_open,
305 .read = seq_read,
306 .llseek = seq_lseek,
307 .release = single_release,
308 };
309 #endif /* CONFIG_PROC_FS */
310
311 module_param_array(eisa, int, NULL, 0);
312
313 static void release_io_mem(ctlr_info_t *c)
314 {
315 /* if IO mem was not protected do nothing */
316 if( c->io_mem_addr == 0)
317 return;
318 release_region(c->io_mem_addr, c->io_mem_length);
319 c->io_mem_addr = 0;
320 c->io_mem_length = 0;
321 }
322
323 static void __devexit cpqarray_remove_one(int i)
324 {
325 int j;
326 char buff[4];
327
328 /* sendcmd will turn off interrupt, and send the flush...
329 * To write all data in the battery backed cache to disks
330 * no data returned, but don't want to send NULL to sendcmd */
331 if( sendcmd(FLUSH_CACHE, i, buff, 4, 0, 0, 0))
332 {
333 printk(KERN_WARNING "Unable to flush cache on controller %d\n",
334 i);
335 }
336 free_irq(hba[i]->intr, hba[i]);
337 iounmap(hba[i]->vaddr);
338 unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
339 del_timer(&hba[i]->timer);
340 remove_proc_entry(hba[i]->devname, proc_array);
341 pci_free_consistent(hba[i]->pci_dev,
342 NR_CMDS * sizeof(cmdlist_t), (hba[i]->cmd_pool),
343 hba[i]->cmd_pool_dhandle);
344 kfree(hba[i]->cmd_pool_bits);
345 for(j = 0; j < NWD; j++) {
346 if (ida_gendisk[i][j]->flags & GENHD_FL_UP)
347 del_gendisk(ida_gendisk[i][j]);
348 put_disk(ida_gendisk[i][j]);
349 }
350 blk_cleanup_queue(hba[i]->queue);
351 release_io_mem(hba[i]);
352 free_hba(i);
353 }
354
355 static void __devexit cpqarray_remove_one_pci (struct pci_dev *pdev)
356 {
357 int i;
358 ctlr_info_t *tmp_ptr;
359
360 if (pci_get_drvdata(pdev) == NULL) {
361 printk( KERN_ERR "cpqarray: Unable to remove device \n");
362 return;
363 }
364
365 tmp_ptr = pci_get_drvdata(pdev);
366 i = tmp_ptr->ctlr;
367 if (hba[i] == NULL) {
368 printk(KERN_ERR "cpqarray: controller %d appears to have"
369 "already been removed \n", i);
370 return;
371 }
372 pci_set_drvdata(pdev, NULL);
373
374 cpqarray_remove_one(i);
375 }
376
377 /* removing an instance that was not removed automatically..
378 * must be an eisa card.
379 */
380 static void __devexit cpqarray_remove_one_eisa (int i)
381 {
382 if (hba[i] == NULL) {
383 printk(KERN_ERR "cpqarray: controller %d appears to have"
384 "already been removed \n", i);
385 return;
386 }
387 cpqarray_remove_one(i);
388 }
389
390 /* pdev is NULL for eisa */
391 static int __devinit cpqarray_register_ctlr( int i, struct pci_dev *pdev)
392 {
393 struct request_queue *q;
394 int j;
395
396 /*
397 * register block devices
398 * Find disks and fill in structs
399 * Get an interrupt, set the Q depth and get into /proc
400 */
401
402 /* If this successful it should insure that we are the only */
403 /* instance of the driver */
404 if (register_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname)) {
405 goto Enomem4;
406 }
407 hba[i]->access.set_intr_mask(hba[i], 0);
408 if (request_irq(hba[i]->intr, do_ida_intr,
409 IRQF_DISABLED|IRQF_SHARED, hba[i]->devname, hba[i]))
410 {
411 printk(KERN_ERR "cpqarray: Unable to get irq %d for %s\n",
412 hba[i]->intr, hba[i]->devname);
413 goto Enomem3;
414 }
415
416 for (j=0; j<NWD; j++) {
417 ida_gendisk[i][j] = alloc_disk(1 << NWD_SHIFT);
418 if (!ida_gendisk[i][j])
419 goto Enomem2;
420 }
421
422 hba[i]->cmd_pool = pci_alloc_consistent(
423 hba[i]->pci_dev, NR_CMDS * sizeof(cmdlist_t),
424 &(hba[i]->cmd_pool_dhandle));
425 hba[i]->cmd_pool_bits = kcalloc(
426 DIV_ROUND_UP(NR_CMDS, BITS_PER_LONG), sizeof(unsigned long),
427 GFP_KERNEL);
428
429 if (!hba[i]->cmd_pool_bits || !hba[i]->cmd_pool)
430 goto Enomem1;
431
432 memset(hba[i]->cmd_pool, 0, NR_CMDS * sizeof(cmdlist_t));
433 printk(KERN_INFO "cpqarray: Finding drives on %s",
434 hba[i]->devname);
435
436 spin_lock_init(&hba[i]->lock);
437 q = blk_init_queue(do_ida_request, &hba[i]->lock);
438 if (!q)
439 goto Enomem1;
440
441 hba[i]->queue = q;
442 q->queuedata = hba[i];
443
444 getgeometry(i);
445 start_fwbk(i);
446
447 ida_procinit(i);
448
449 if (pdev)
450 blk_queue_bounce_limit(q, hba[i]->pci_dev->dma_mask);
451
452 /* This is a hardware imposed limit. */
453 blk_queue_max_segments(q, SG_MAX);
454
455 init_timer(&hba[i]->timer);
456 hba[i]->timer.expires = jiffies + IDA_TIMER;
457 hba[i]->timer.data = (unsigned long)hba[i];
458 hba[i]->timer.function = ida_timer;
459 add_timer(&hba[i]->timer);
460
461 /* Enable IRQ now that spinlock and rate limit timer are set up */
462 hba[i]->access.set_intr_mask(hba[i], FIFO_NOT_EMPTY);
463
464 for(j=0; j<NWD; j++) {
465 struct gendisk *disk = ida_gendisk[i][j];
466 drv_info_t *drv = &hba[i]->drv[j];
467 sprintf(disk->disk_name, "ida/c%dd%d", i, j);
468 disk->major = COMPAQ_SMART2_MAJOR + i;
469 disk->first_minor = j<<NWD_SHIFT;
470 disk->fops = &ida_fops;
471 if (j && !drv->nr_blks)
472 continue;
473 blk_queue_logical_block_size(hba[i]->queue, drv->blk_size);
474 set_capacity(disk, drv->nr_blks);
475 disk->queue = hba[i]->queue;
476 disk->private_data = drv;
477 add_disk(disk);
478 }
479
480 /* done ! */
481 return(i);
482
483 Enomem1:
484 nr_ctlr = i;
485 kfree(hba[i]->cmd_pool_bits);
486 if (hba[i]->cmd_pool)
487 pci_free_consistent(hba[i]->pci_dev, NR_CMDS*sizeof(cmdlist_t),
488 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
489 Enomem2:
490 while (j--) {
491 put_disk(ida_gendisk[i][j]);
492 ida_gendisk[i][j] = NULL;
493 }
494 free_irq(hba[i]->intr, hba[i]);
495 Enomem3:
496 unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
497 Enomem4:
498 if (pdev)
499 pci_set_drvdata(pdev, NULL);
500 release_io_mem(hba[i]);
501 free_hba(i);
502
503 printk( KERN_ERR "cpqarray: out of memory");
504
505 return -1;
506 }
507
508 static int __devinit cpqarray_init_one( struct pci_dev *pdev,
509 const struct pci_device_id *ent)
510 {
511 int i;
512
513 printk(KERN_DEBUG "cpqarray: Device 0x%x has been found at"
514 " bus %d dev %d func %d\n",
515 pdev->device, pdev->bus->number, PCI_SLOT(pdev->devfn),
516 PCI_FUNC(pdev->devfn));
517 i = alloc_cpqarray_hba();
518 if( i < 0 )
519 return (-1);
520 memset(hba[i], 0, sizeof(ctlr_info_t));
521 sprintf(hba[i]->devname, "ida%d", i);
522 hba[i]->ctlr = i;
523 /* Initialize the pdev driver private data */
524 pci_set_drvdata(pdev, hba[i]);
525
526 if (cpqarray_pci_init(hba[i], pdev) != 0) {
527 pci_set_drvdata(pdev, NULL);
528 release_io_mem(hba[i]);
529 free_hba(i);
530 return -1;
531 }
532
533 return (cpqarray_register_ctlr(i, pdev));
534 }
535
536 static struct pci_driver cpqarray_pci_driver = {
537 .name = "cpqarray",
538 .probe = cpqarray_init_one,
539 .remove = __devexit_p(cpqarray_remove_one_pci),
540 .id_table = cpqarray_pci_device_id,
541 };
542
543 /*
544 * This is it. Find all the controllers and register them.
545 * returns the number of block devices registered.
546 */
547 static int __init cpqarray_init(void)
548 {
549 int num_cntlrs_reg = 0;
550 int i;
551 int rc = 0;
552
553 /* detect controllers */
554 printk(DRIVER_NAME "\n");
555
556 rc = pci_register_driver(&cpqarray_pci_driver);
557 if (rc)
558 return rc;
559 cpqarray_eisa_detect();
560
561 for (i=0; i < MAX_CTLR; i++) {
562 if (hba[i] != NULL)
563 num_cntlrs_reg++;
564 }
565
566 if (num_cntlrs_reg)
567 return 0;
568 else {
569 pci_unregister_driver(&cpqarray_pci_driver);
570 return -ENODEV;
571 }
572 }
573
574 /* Function to find the first free pointer into our hba[] array */
575 /* Returns -1 if no free entries are left. */
576 static int alloc_cpqarray_hba(void)
577 {
578 int i;
579
580 for(i=0; i< MAX_CTLR; i++) {
581 if (hba[i] == NULL) {
582 hba[i] = kmalloc(sizeof(ctlr_info_t), GFP_KERNEL);
583 if(hba[i]==NULL) {
584 printk(KERN_ERR "cpqarray: out of memory.\n");
585 return (-1);
586 }
587 return (i);
588 }
589 }
590 printk(KERN_WARNING "cpqarray: This driver supports a maximum"
591 " of 8 controllers.\n");
592 return(-1);
593 }
594
595 static void free_hba(int i)
596 {
597 kfree(hba[i]);
598 hba[i]=NULL;
599 }
600
601 /*
602 * Find the IO address of the controller, its IRQ and so forth. Fill
603 * in some basic stuff into the ctlr_info_t structure.
604 */
605 static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
606 {
607 ushort vendor_id, device_id, command;
608 unchar cache_line_size, latency_timer;
609 unchar irq, revision;
610 unsigned long addr[6];
611 __u32 board_id;
612
613 int i;
614
615 c->pci_dev = pdev;
616 pci_set_master(pdev);
617 if (pci_enable_device(pdev)) {
618 printk(KERN_ERR "cpqarray: Unable to Enable PCI device\n");
619 return -1;
620 }
621 vendor_id = pdev->vendor;
622 device_id = pdev->device;
623 revision = pdev->revision;
624 irq = pdev->irq;
625
626 for(i=0; i<6; i++)
627 addr[i] = pci_resource_start(pdev, i);
628
629 if (pci_set_dma_mask(pdev, CPQARRAY_DMA_MASK) != 0)
630 {
631 printk(KERN_ERR "cpqarray: Unable to set DMA mask\n");
632 return -1;
633 }
634
635 pci_read_config_word(pdev, PCI_COMMAND, &command);
636 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
637 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_timer);
638
639 pci_read_config_dword(pdev, 0x2c, &board_id);
640
641 /* check to see if controller has been disabled */
642 if(!(command & 0x02)) {
643 printk(KERN_WARNING
644 "cpqarray: controller appears to be disabled\n");
645 return(-1);
646 }
647
648 DBGINFO(
649 printk("vendor_id = %x\n", vendor_id);
650 printk("device_id = %x\n", device_id);
651 printk("command = %x\n", command);
652 for(i=0; i<6; i++)
653 printk("addr[%d] = %lx\n", i, addr[i]);
654 printk("revision = %x\n", revision);
655 printk("irq = %x\n", irq);
656 printk("cache_line_size = %x\n", cache_line_size);
657 printk("latency_timer = %x\n", latency_timer);
658 printk("board_id = %x\n", board_id);
659 );
660
661 c->intr = irq;
662
663 for(i=0; i<6; i++) {
664 if (pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO)
665 { /* IO space */
666 c->io_mem_addr = addr[i];
667 c->io_mem_length = pci_resource_end(pdev, i)
668 - pci_resource_start(pdev, i) + 1;
669 if(!request_region( c->io_mem_addr, c->io_mem_length,
670 "cpqarray"))
671 {
672 printk( KERN_WARNING "cpqarray I/O memory range already in use addr %lx length = %ld\n", c->io_mem_addr, c->io_mem_length);
673 c->io_mem_addr = 0;
674 c->io_mem_length = 0;
675 }
676 break;
677 }
678 }
679
680 c->paddr = 0;
681 for(i=0; i<6; i++)
682 if (!(pci_resource_flags(pdev, i) &
683 PCI_BASE_ADDRESS_SPACE_IO)) {
684 c->paddr = pci_resource_start (pdev, i);
685 break;
686 }
687 if (!c->paddr)
688 return -1;
689 c->vaddr = remap_pci_mem(c->paddr, 128);
690 if (!c->vaddr)
691 return -1;
692 c->board_id = board_id;
693
694 for(i=0; i<NR_PRODUCTS; i++) {
695 if (board_id == products[i].board_id) {
696 c->product_name = products[i].product_name;
697 c->access = *(products[i].access);
698 break;
699 }
700 }
701 if (i == NR_PRODUCTS) {
702 printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
703 " to access the SMART Array controller %08lx\n",
704 (unsigned long)board_id);
705 return -1;
706 }
707
708 return 0;
709 }
710
711 /*
712 * Map (physical) PCI mem into (virtual) kernel space
713 */
714 static void __iomem *remap_pci_mem(ulong base, ulong size)
715 {
716 ulong page_base = ((ulong) base) & PAGE_MASK;
717 ulong page_offs = ((ulong) base) - page_base;
718 void __iomem *page_remapped = ioremap(page_base, page_offs+size);
719
720 return (page_remapped ? (page_remapped + page_offs) : NULL);
721 }
722
723 #ifndef MODULE
724 /*
725 * Config string is a comma separated set of i/o addresses of EISA cards.
726 */
727 static int cpqarray_setup(char *str)
728 {
729 int i, ints[9];
730
731 (void)get_options(str, ARRAY_SIZE(ints), ints);
732
733 for(i=0; i<ints[0] && i<8; i++)
734 eisa[i] = ints[i+1];
735 return 1;
736 }
737
738 __setup("smart2=", cpqarray_setup);
739
740 #endif
741
742 /*
743 * Find an EISA controller's signature. Set up an hba if we find it.
744 */
745 static int __devinit cpqarray_eisa_detect(void)
746 {
747 int i=0, j;
748 __u32 board_id;
749 int intr;
750 int ctlr;
751 int num_ctlr = 0;
752
753 while(i<8 && eisa[i]) {
754 ctlr = alloc_cpqarray_hba();
755 if(ctlr == -1)
756 break;
757 board_id = inl(eisa[i]+0xC80);
758 for(j=0; j < NR_PRODUCTS; j++)
759 if (board_id == products[j].board_id)
760 break;
761
762 if (j == NR_PRODUCTS) {
763 printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
764 " to access the SMART Array controller %08lx\n", (unsigned long)board_id);
765 continue;
766 }
767
768 memset(hba[ctlr], 0, sizeof(ctlr_info_t));
769 hba[ctlr]->io_mem_addr = eisa[i];
770 hba[ctlr]->io_mem_length = 0x7FF;
771 if(!request_region(hba[ctlr]->io_mem_addr,
772 hba[ctlr]->io_mem_length,
773 "cpqarray"))
774 {
775 printk(KERN_WARNING "cpqarray: I/O range already in "
776 "use addr = %lx length = %ld\n",
777 hba[ctlr]->io_mem_addr,
778 hba[ctlr]->io_mem_length);
779 free_hba(ctlr);
780 continue;
781 }
782
783 /*
784 * Read the config register to find our interrupt
785 */
786 intr = inb(eisa[i]+0xCC0) >> 4;
787 if (intr & 1) intr = 11;
788 else if (intr & 2) intr = 10;
789 else if (intr & 4) intr = 14;
790 else if (intr & 8) intr = 15;
791
792 hba[ctlr]->intr = intr;
793 sprintf(hba[ctlr]->devname, "ida%d", nr_ctlr);
794 hba[ctlr]->product_name = products[j].product_name;
795 hba[ctlr]->access = *(products[j].access);
796 hba[ctlr]->ctlr = ctlr;
797 hba[ctlr]->board_id = board_id;
798 hba[ctlr]->pci_dev = NULL; /* not PCI */
799
800 DBGINFO(
801 printk("i = %d, j = %d\n", i, j);
802 printk("irq = %x\n", intr);
803 printk("product name = %s\n", products[j].product_name);
804 printk("board_id = %x\n", board_id);
805 );
806
807 num_ctlr++;
808 i++;
809
810 if (cpqarray_register_ctlr(ctlr, NULL) == -1)
811 printk(KERN_WARNING
812 "cpqarray: Can't register EISA controller %d\n",
813 ctlr);
814
815 }
816
817 return num_ctlr;
818 }
819
820 /*
821 * Open. Make sure the device is really there.
822 */
823 static int ida_open(struct block_device *bdev, fmode_t mode)
824 {
825 drv_info_t *drv = get_drv(bdev->bd_disk);
826 ctlr_info_t *host = get_host(bdev->bd_disk);
827
828 DBGINFO(printk("ida_open %s\n", bdev->bd_disk->disk_name));
829 /*
830 * Root is allowed to open raw volume zero even if it's not configured
831 * so array config can still work. I don't think I really like this,
832 * but I'm already using way to many device nodes to claim another one
833 * for "raw controller".
834 */
835 if (!drv->nr_blks) {
836 if (!capable(CAP_SYS_RAWIO))
837 return -ENXIO;
838 if (!capable(CAP_SYS_ADMIN) && drv != host->drv)
839 return -ENXIO;
840 }
841 host->usage_count++;
842 return 0;
843 }
844
845 static int ida_unlocked_open(struct block_device *bdev, fmode_t mode)
846 {
847 int ret;
848
849 mutex_lock(&cpqarray_mutex);
850 ret = ida_open(bdev, mode);
851 mutex_unlock(&cpqarray_mutex);
852
853 return ret;
854 }
855
856 /*
857 * Close. Sync first.
858 */
859 static int ida_release(struct gendisk *disk, fmode_t mode)
860 {
861 ctlr_info_t *host;
862
863 mutex_lock(&cpqarray_mutex);
864 host = get_host(disk);
865 host->usage_count--;
866 mutex_unlock(&cpqarray_mutex);
867
868 return 0;
869 }
870
871 /*
872 * Enqueuing and dequeuing functions for cmdlists.
873 */
874 static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c)
875 {
876 if (*Qptr == NULL) {
877 *Qptr = c;
878 c->next = c->prev = c;
879 } else {
880 c->prev = (*Qptr)->prev;
881 c->next = (*Qptr);
882 (*Qptr)->prev->next = c;
883 (*Qptr)->prev = c;
884 }
885 }
886
887 static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c)
888 {
889 if (c && c->next != c) {
890 if (*Qptr == c) *Qptr = c->next;
891 c->prev->next = c->next;
892 c->next->prev = c->prev;
893 } else {
894 *Qptr = NULL;
895 }
896 return c;
897 }
898
899 /*
900 * Get a request and submit it to the controller.
901 * This routine needs to grab all the requests it possibly can from the
902 * req Q and submit them. Interrupts are off (and need to be off) when you
903 * are in here (either via the dummy do_ida_request functions or by being
904 * called from the interrupt handler
905 */
906 static void do_ida_request(struct request_queue *q)
907 {
908 ctlr_info_t *h = q->queuedata;
909 cmdlist_t *c;
910 struct request *creq;
911 struct scatterlist tmp_sg[SG_MAX];
912 int i, dir, seg;
913
914 queue_next:
915 creq = blk_peek_request(q);
916 if (!creq)
917 goto startio;
918
919 BUG_ON(creq->nr_phys_segments > SG_MAX);
920
921 if ((c = cmd_alloc(h,1)) == NULL)
922 goto startio;
923
924 blk_start_request(creq);
925
926 c->ctlr = h->ctlr;
927 c->hdr.unit = (drv_info_t *)(creq->rq_disk->private_data) - h->drv;
928 c->hdr.size = sizeof(rblk_t) >> 2;
929 c->size += sizeof(rblk_t);
930
931 c->req.hdr.blk = blk_rq_pos(creq);
932 c->rq = creq;
933 DBGPX(
934 printk("sector=%d, nr_sectors=%u\n",
935 blk_rq_pos(creq), blk_rq_sectors(creq));
936 );
937 sg_init_table(tmp_sg, SG_MAX);
938 seg = blk_rq_map_sg(q, creq, tmp_sg);
939
940 /* Now do all the DMA Mappings */
941 if (rq_data_dir(creq) == READ)
942 dir = PCI_DMA_FROMDEVICE;
943 else
944 dir = PCI_DMA_TODEVICE;
945 for( i=0; i < seg; i++)
946 {
947 c->req.sg[i].size = tmp_sg[i].length;
948 c->req.sg[i].addr = (__u32) pci_map_page(h->pci_dev,
949 sg_page(&tmp_sg[i]),
950 tmp_sg[i].offset,
951 tmp_sg[i].length, dir);
952 }
953 DBGPX( printk("Submitting %u sectors in %d segments\n", blk_rq_sectors(creq), seg); );
954 c->req.hdr.sg_cnt = seg;
955 c->req.hdr.blk_cnt = blk_rq_sectors(creq);
956 c->req.hdr.cmd = (rq_data_dir(creq) == READ) ? IDA_READ : IDA_WRITE;
957 c->type = CMD_RWREQ;
958
959 /* Put the request on the tail of the request queue */
960 addQ(&h->reqQ, c);
961 h->Qdepth++;
962 if (h->Qdepth > h->maxQsinceinit)
963 h->maxQsinceinit = h->Qdepth;
964
965 goto queue_next;
966
967 startio:
968 start_io(h);
969 }
970
971 /*
972 * start_io submits everything on a controller's request queue
973 * and moves it to the completion queue.
974 *
975 * Interrupts had better be off if you're in here
976 */
977 static void start_io(ctlr_info_t *h)
978 {
979 cmdlist_t *c;
980
981 while((c = h->reqQ) != NULL) {
982 /* Can't do anything if we're busy */
983 if (h->access.fifo_full(h) == 0)
984 return;
985
986 /* Get the first entry from the request Q */
987 removeQ(&h->reqQ, c);
988 h->Qdepth--;
989
990 /* Tell the controller to do our bidding */
991 h->access.submit_command(h, c);
992
993 /* Get onto the completion Q */
994 addQ(&h->cmpQ, c);
995 }
996 }
997
998 /*
999 * Mark all buffers that cmd was responsible for
1000 */
1001 static inline void complete_command(cmdlist_t *cmd, int timeout)
1002 {
1003 struct request *rq = cmd->rq;
1004 int error = 0;
1005 int i, ddir;
1006
1007 if (cmd->req.hdr.rcode & RCODE_NONFATAL &&
1008 (hba[cmd->ctlr]->misc_tflags & MISC_NONFATAL_WARN) == 0) {
1009 printk(KERN_NOTICE "Non Fatal error on ida/c%dd%d\n",
1010 cmd->ctlr, cmd->hdr.unit);
1011 hba[cmd->ctlr]->misc_tflags |= MISC_NONFATAL_WARN;
1012 }
1013 if (cmd->req.hdr.rcode & RCODE_FATAL) {
1014 printk(KERN_WARNING "Fatal error on ida/c%dd%d\n",
1015 cmd->ctlr, cmd->hdr.unit);
1016 error = -EIO;
1017 }
1018 if (cmd->req.hdr.rcode & RCODE_INVREQ) {
1019 printk(KERN_WARNING "Invalid request on ida/c%dd%d = (cmd=%x sect=%d cnt=%d sg=%d ret=%x)\n",
1020 cmd->ctlr, cmd->hdr.unit, cmd->req.hdr.cmd,
1021 cmd->req.hdr.blk, cmd->req.hdr.blk_cnt,
1022 cmd->req.hdr.sg_cnt, cmd->req.hdr.rcode);
1023 error = -EIO;
1024 }
1025 if (timeout)
1026 error = -EIO;
1027 /* unmap the DMA mapping for all the scatter gather elements */
1028 if (cmd->req.hdr.cmd == IDA_READ)
1029 ddir = PCI_DMA_FROMDEVICE;
1030 else
1031 ddir = PCI_DMA_TODEVICE;
1032 for(i=0; i<cmd->req.hdr.sg_cnt; i++)
1033 pci_unmap_page(hba[cmd->ctlr]->pci_dev, cmd->req.sg[i].addr,
1034 cmd->req.sg[i].size, ddir);
1035
1036 DBGPX(printk("Done with %p\n", rq););
1037 __blk_end_request_all(rq, error);
1038 }
1039
1040 /*
1041 * The controller will interrupt us upon completion of commands.
1042 * Find the command on the completion queue, remove it, tell the OS and
1043 * try to queue up more IO
1044 */
1045 static irqreturn_t do_ida_intr(int irq, void *dev_id)
1046 {
1047 ctlr_info_t *h = dev_id;
1048 cmdlist_t *c;
1049 unsigned long istat;
1050 unsigned long flags;
1051 __u32 a,a1;
1052
1053 istat = h->access.intr_pending(h);
1054 /* Is this interrupt for us? */
1055 if (istat == 0)
1056 return IRQ_NONE;
1057
1058 /*
1059 * If there are completed commands in the completion queue,
1060 * we had better do something about it.
1061 */
1062 spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
1063 if (istat & FIFO_NOT_EMPTY) {
1064 while((a = h->access.command_completed(h))) {
1065 a1 = a; a &= ~3;
1066 if ((c = h->cmpQ) == NULL)
1067 {
1068 printk(KERN_WARNING "cpqarray: Completion of %08lx ignored\n", (unsigned long)a1);
1069 continue;
1070 }
1071 while(c->busaddr != a) {
1072 c = c->next;
1073 if (c == h->cmpQ)
1074 break;
1075 }
1076 /*
1077 * If we've found the command, take it off the
1078 * completion Q and free it
1079 */
1080 if (c->busaddr == a) {
1081 removeQ(&h->cmpQ, c);
1082 /* Check for invalid command.
1083 * Controller returns command error,
1084 * But rcode = 0.
1085 */
1086
1087 if((a1 & 0x03) && (c->req.hdr.rcode == 0))
1088 {
1089 c->req.hdr.rcode = RCODE_INVREQ;
1090 }
1091 if (c->type == CMD_RWREQ) {
1092 complete_command(c, 0);
1093 cmd_free(h, c, 1);
1094 } else if (c->type == CMD_IOCTL_PEND) {
1095 c->type = CMD_IOCTL_DONE;
1096 }
1097 continue;
1098 }
1099 }
1100 }
1101
1102 /*
1103 * See if we can queue up some more IO
1104 */
1105 do_ida_request(h->queue);
1106 spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags);
1107 return IRQ_HANDLED;
1108 }
1109
1110 /*
1111 * This timer was for timing out requests that haven't happened after
1112 * IDA_TIMEOUT. That wasn't such a good idea. This timer is used to
1113 * reset a flags structure so we don't flood the user with
1114 * "Non-Fatal error" messages.
1115 */
1116 static void ida_timer(unsigned long tdata)
1117 {
1118 ctlr_info_t *h = (ctlr_info_t*)tdata;
1119
1120 h->timer.expires = jiffies + IDA_TIMER;
1121 add_timer(&h->timer);
1122 h->misc_tflags = 0;
1123 }
1124
1125 static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1126 {
1127 drv_info_t *drv = get_drv(bdev->bd_disk);
1128
1129 if (drv->cylinders) {
1130 geo->heads = drv->heads;
1131 geo->sectors = drv->sectors;
1132 geo->cylinders = drv->cylinders;
1133 } else {
1134 geo->heads = 0xff;
1135 geo->sectors = 0x3f;
1136 geo->cylinders = drv->nr_blks / (0xff*0x3f);
1137 }
1138
1139 return 0;
1140 }
1141
1142 /*
1143 * ida_ioctl does some miscellaneous stuff like reporting drive geometry,
1144 * setting readahead and submitting commands from userspace to the controller.
1145 */
1146 static int ida_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
1147 {
1148 drv_info_t *drv = get_drv(bdev->bd_disk);
1149 ctlr_info_t *host = get_host(bdev->bd_disk);
1150 int error;
1151 ida_ioctl_t __user *io = (ida_ioctl_t __user *)arg;
1152 ida_ioctl_t *my_io;
1153
1154 switch(cmd) {
1155 case IDAGETDRVINFO:
1156 if (copy_to_user(&io->c.drv, drv, sizeof(drv_info_t)))
1157 return -EFAULT;
1158 return 0;
1159 case IDAPASSTHRU:
1160 if (!capable(CAP_SYS_RAWIO))
1161 return -EPERM;
1162 my_io = kmalloc(sizeof(ida_ioctl_t), GFP_KERNEL);
1163 if (!my_io)
1164 return -ENOMEM;
1165 error = -EFAULT;
1166 if (copy_from_user(my_io, io, sizeof(*my_io)))
1167 goto out_passthru;
1168 error = ida_ctlr_ioctl(host, drv - host->drv, my_io);
1169 if (error)
1170 goto out_passthru;
1171 error = -EFAULT;
1172 if (copy_to_user(io, my_io, sizeof(*my_io)))
1173 goto out_passthru;
1174 error = 0;
1175 out_passthru:
1176 kfree(my_io);
1177 return error;
1178 case IDAGETCTLRSIG:
1179 if (!arg) return -EINVAL;
1180 if (put_user(host->ctlr_sig, (int __user *)arg))
1181 return -EFAULT;
1182 return 0;
1183 case IDAREVALIDATEVOLS:
1184 if (MINOR(bdev->bd_dev) != 0)
1185 return -ENXIO;
1186 return revalidate_allvol(host);
1187 case IDADRIVERVERSION:
1188 if (!arg) return -EINVAL;
1189 if (put_user(DRIVER_VERSION, (unsigned long __user *)arg))
1190 return -EFAULT;
1191 return 0;
1192 case IDAGETPCIINFO:
1193 {
1194
1195 ida_pci_info_struct pciinfo;
1196
1197 if (!arg) return -EINVAL;
1198 pciinfo.bus = host->pci_dev->bus->number;
1199 pciinfo.dev_fn = host->pci_dev->devfn;
1200 pciinfo.board_id = host->board_id;
1201 if(copy_to_user((void __user *) arg, &pciinfo,
1202 sizeof( ida_pci_info_struct)))
1203 return -EFAULT;
1204 return(0);
1205 }
1206
1207 default:
1208 return -EINVAL;
1209 }
1210
1211 }
1212
1213 static int ida_ioctl(struct block_device *bdev, fmode_t mode,
1214 unsigned int cmd, unsigned long param)
1215 {
1216 int ret;
1217
1218 mutex_lock(&cpqarray_mutex);
1219 ret = ida_locked_ioctl(bdev, mode, cmd, param);
1220 mutex_unlock(&cpqarray_mutex);
1221
1222 return ret;
1223 }
1224
1225 /*
1226 * ida_ctlr_ioctl is for passing commands to the controller from userspace.
1227 * The command block (io) has already been copied to kernel space for us,
1228 * however, any elements in the sglist need to be copied to kernel space
1229 * or copied back to userspace.
1230 *
1231 * Only root may perform a controller passthru command, however I'm not doing
1232 * any serious sanity checking on the arguments. Doing an IDA_WRITE_MEDIA and
1233 * putting a 64M buffer in the sglist is probably a *bad* idea.
1234 */
1235 static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
1236 {
1237 int ctlr = h->ctlr;
1238 cmdlist_t *c;
1239 void *p = NULL;
1240 unsigned long flags;
1241 int error;
1242
1243 if ((c = cmd_alloc(h, 0)) == NULL)
1244 return -ENOMEM;
1245 c->ctlr = ctlr;
1246 c->hdr.unit = (io->unit & UNITVALID) ? (io->unit & ~UNITVALID) : dsk;
1247 c->hdr.size = sizeof(rblk_t) >> 2;
1248 c->size += sizeof(rblk_t);
1249
1250 c->req.hdr.cmd = io->cmd;
1251 c->req.hdr.blk = io->blk;
1252 c->req.hdr.blk_cnt = io->blk_cnt;
1253 c->type = CMD_IOCTL_PEND;
1254
1255 /* Pre submit processing */
1256 switch(io->cmd) {
1257 case PASSTHRU_A:
1258 p = memdup_user(io->sg[0].addr, io->sg[0].size);
1259 if (IS_ERR(p)) {
1260 error = PTR_ERR(p);
1261 cmd_free(h, c, 0);
1262 return error;
1263 }
1264 c->req.hdr.blk = pci_map_single(h->pci_dev, &(io->c),
1265 sizeof(ida_ioctl_t),
1266 PCI_DMA_BIDIRECTIONAL);
1267 c->req.sg[0].size = io->sg[0].size;
1268 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1269 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1270 c->req.hdr.sg_cnt = 1;
1271 break;
1272 case IDA_READ:
1273 case READ_FLASH_ROM:
1274 case SENSE_CONTROLLER_PERFORMANCE:
1275 p = kmalloc(io->sg[0].size, GFP_KERNEL);
1276 if (!p)
1277 {
1278 error = -ENOMEM;
1279 cmd_free(h, c, 0);
1280 return(error);
1281 }
1282
1283 c->req.sg[0].size = io->sg[0].size;
1284 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1285 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1286 c->req.hdr.sg_cnt = 1;
1287 break;
1288 case IDA_WRITE:
1289 case IDA_WRITE_MEDIA:
1290 case DIAG_PASS_THRU:
1291 case COLLECT_BUFFER:
1292 case WRITE_FLASH_ROM:
1293 p = memdup_user(io->sg[0].addr, io->sg[0].size);
1294 if (IS_ERR(p)) {
1295 error = PTR_ERR(p);
1296 cmd_free(h, c, 0);
1297 return error;
1298 }
1299 c->req.sg[0].size = io->sg[0].size;
1300 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1301 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1302 c->req.hdr.sg_cnt = 1;
1303 break;
1304 default:
1305 c->req.sg[0].size = sizeof(io->c);
1306 c->req.sg[0].addr = pci_map_single(h->pci_dev,&io->c,
1307 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1308 c->req.hdr.sg_cnt = 1;
1309 }
1310
1311 /* Put the request on the tail of the request queue */
1312 spin_lock_irqsave(IDA_LOCK(ctlr), flags);
1313 addQ(&h->reqQ, c);
1314 h->Qdepth++;
1315 start_io(h);
1316 spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1317
1318 /* Wait for completion */
1319 while(c->type != CMD_IOCTL_DONE)
1320 schedule();
1321
1322 /* Unmap the DMA */
1323 pci_unmap_single(h->pci_dev, c->req.sg[0].addr, c->req.sg[0].size,
1324 PCI_DMA_BIDIRECTIONAL);
1325 /* Post submit processing */
1326 switch(io->cmd) {
1327 case PASSTHRU_A:
1328 pci_unmap_single(h->pci_dev, c->req.hdr.blk,
1329 sizeof(ida_ioctl_t),
1330 PCI_DMA_BIDIRECTIONAL);
1331 case IDA_READ:
1332 case DIAG_PASS_THRU:
1333 case SENSE_CONTROLLER_PERFORMANCE:
1334 case READ_FLASH_ROM:
1335 if (copy_to_user(io->sg[0].addr, p, io->sg[0].size)) {
1336 kfree(p);
1337 return -EFAULT;
1338 }
1339 /* fall through and free p */
1340 case IDA_WRITE:
1341 case IDA_WRITE_MEDIA:
1342 case COLLECT_BUFFER:
1343 case WRITE_FLASH_ROM:
1344 kfree(p);
1345 break;
1346 default:;
1347 /* Nothing to do */
1348 }
1349
1350 io->rcode = c->req.hdr.rcode;
1351 cmd_free(h, c, 0);
1352 return(0);
1353 }
1354
1355 /*
1356 * Commands are pre-allocated in a large block. Here we use a simple bitmap
1357 * scheme to suballocte them to the driver. Operations that are not time
1358 * critical (and can wait for kmalloc and possibly sleep) can pass in NULL
1359 * as the first argument to get a new command.
1360 */
1361 static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool)
1362 {
1363 cmdlist_t * c;
1364 int i;
1365 dma_addr_t cmd_dhandle;
1366
1367 if (!get_from_pool) {
1368 c = (cmdlist_t*)pci_alloc_consistent(h->pci_dev,
1369 sizeof(cmdlist_t), &cmd_dhandle);
1370 if(c==NULL)
1371 return NULL;
1372 } else {
1373 do {
1374 i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
1375 if (i == NR_CMDS)
1376 return NULL;
1377 } while(test_and_set_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG)) != 0);
1378 c = h->cmd_pool + i;
1379 cmd_dhandle = h->cmd_pool_dhandle + i*sizeof(cmdlist_t);
1380 h->nr_allocs++;
1381 }
1382
1383 memset(c, 0, sizeof(cmdlist_t));
1384 c->busaddr = cmd_dhandle;
1385 return c;
1386 }
1387
1388 static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool)
1389 {
1390 int i;
1391
1392 if (!got_from_pool) {
1393 pci_free_consistent(h->pci_dev, sizeof(cmdlist_t), c,
1394 c->busaddr);
1395 } else {
1396 i = c - h->cmd_pool;
1397 clear_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG));
1398 h->nr_frees++;
1399 }
1400 }
1401
1402 /***********************************************************************
1403 name: sendcmd
1404 Send a command to an IDA using the memory mapped FIFO interface
1405 and wait for it to complete.
1406 This routine should only be called at init time.
1407 ***********************************************************************/
1408 static int sendcmd(
1409 __u8 cmd,
1410 int ctlr,
1411 void *buff,
1412 size_t size,
1413 unsigned int blk,
1414 unsigned int blkcnt,
1415 unsigned int log_unit )
1416 {
1417 cmdlist_t *c;
1418 int complete;
1419 unsigned long temp;
1420 unsigned long i;
1421 ctlr_info_t *info_p = hba[ctlr];
1422
1423 c = cmd_alloc(info_p, 1);
1424 if(!c)
1425 return IO_ERROR;
1426 c->ctlr = ctlr;
1427 c->hdr.unit = log_unit;
1428 c->hdr.prio = 0;
1429 c->hdr.size = sizeof(rblk_t) >> 2;
1430 c->size += sizeof(rblk_t);
1431
1432 /* The request information. */
1433 c->req.hdr.next = 0;
1434 c->req.hdr.rcode = 0;
1435 c->req.bp = 0;
1436 c->req.hdr.sg_cnt = 1;
1437 c->req.hdr.reserved = 0;
1438
1439 if (size == 0)
1440 c->req.sg[0].size = 512;
1441 else
1442 c->req.sg[0].size = size;
1443
1444 c->req.hdr.blk = blk;
1445 c->req.hdr.blk_cnt = blkcnt;
1446 c->req.hdr.cmd = (unsigned char) cmd;
1447 c->req.sg[0].addr = (__u32) pci_map_single(info_p->pci_dev,
1448 buff, c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1449 /*
1450 * Disable interrupt
1451 */
1452 info_p->access.set_intr_mask(info_p, 0);
1453 /* Make sure there is room in the command FIFO */
1454 /* Actually it should be completely empty at this time. */
1455 for (i = 200000; i > 0; i--) {
1456 temp = info_p->access.fifo_full(info_p);
1457 if (temp != 0) {
1458 break;
1459 }
1460 udelay(10);
1461 DBG(
1462 printk(KERN_WARNING "cpqarray ida%d: idaSendPciCmd FIFO full,"
1463 " waiting!\n", ctlr);
1464 );
1465 }
1466 /*
1467 * Send the cmd
1468 */
1469 info_p->access.submit_command(info_p, c);
1470 complete = pollcomplete(ctlr);
1471
1472 pci_unmap_single(info_p->pci_dev, (dma_addr_t) c->req.sg[0].addr,
1473 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1474 if (complete != 1) {
1475 if (complete != c->busaddr) {
1476 printk( KERN_WARNING
1477 "cpqarray ida%d: idaSendPciCmd "
1478 "Invalid command list address returned! (%08lx)\n",
1479 ctlr, (unsigned long)complete);
1480 cmd_free(info_p, c, 1);
1481 return (IO_ERROR);
1482 }
1483 } else {
1484 printk( KERN_WARNING
1485 "cpqarray ida%d: idaSendPciCmd Timeout out, "
1486 "No command list address returned!\n",
1487 ctlr);
1488 cmd_free(info_p, c, 1);
1489 return (IO_ERROR);
1490 }
1491
1492 if (c->req.hdr.rcode & 0x00FE) {
1493 if (!(c->req.hdr.rcode & BIG_PROBLEM)) {
1494 printk( KERN_WARNING
1495 "cpqarray ida%d: idaSendPciCmd, error: "
1496 "Controller failed at init time "
1497 "cmd: 0x%x, return code = 0x%x\n",
1498 ctlr, c->req.hdr.cmd, c->req.hdr.rcode);
1499
1500 cmd_free(info_p, c, 1);
1501 return (IO_ERROR);
1502 }
1503 }
1504 cmd_free(info_p, c, 1);
1505 return (IO_OK);
1506 }
1507
1508 /*
1509 * revalidate_allvol is for online array config utilities. After a
1510 * utility reconfigures the drives in the array, it can use this function
1511 * (through an ioctl) to make the driver zap any previous disk structs for
1512 * that controller and get new ones.
1513 *
1514 * Right now I'm using the getgeometry() function to do this, but this
1515 * function should probably be finer grained and allow you to revalidate one
1516 * particualar logical volume (instead of all of them on a particular
1517 * controller).
1518 */
1519 static int revalidate_allvol(ctlr_info_t *host)
1520 {
1521 int ctlr = host->ctlr;
1522 int i;
1523 unsigned long flags;
1524
1525 spin_lock_irqsave(IDA_LOCK(ctlr), flags);
1526 if (host->usage_count > 1) {
1527 spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1528 printk(KERN_WARNING "cpqarray: Device busy for volume"
1529 " revalidation (usage=%d)\n", host->usage_count);
1530 return -EBUSY;
1531 }
1532 host->usage_count++;
1533 spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1534
1535 /*
1536 * Set the partition and block size structures for all volumes
1537 * on this controller to zero. We will reread all of this data
1538 */
1539 set_capacity(ida_gendisk[ctlr][0], 0);
1540 for (i = 1; i < NWD; i++) {
1541 struct gendisk *disk = ida_gendisk[ctlr][i];
1542 if (disk->flags & GENHD_FL_UP)
1543 del_gendisk(disk);
1544 }
1545 memset(host->drv, 0, sizeof(drv_info_t)*NWD);
1546
1547 /*
1548 * Tell the array controller not to give us any interrupts while
1549 * we check the new geometry. Then turn interrupts back on when
1550 * we're done.
1551 */
1552 host->access.set_intr_mask(host, 0);
1553 getgeometry(ctlr);
1554 host->access.set_intr_mask(host, FIFO_NOT_EMPTY);
1555
1556 for(i=0; i<NWD; i++) {
1557 struct gendisk *disk = ida_gendisk[ctlr][i];
1558 drv_info_t *drv = &host->drv[i];
1559 if (i && !drv->nr_blks)
1560 continue;
1561 blk_queue_logical_block_size(host->queue, drv->blk_size);
1562 set_capacity(disk, drv->nr_blks);
1563 disk->queue = host->queue;
1564 disk->private_data = drv;
1565 if (i)
1566 add_disk(disk);
1567 }
1568
1569 host->usage_count--;
1570 return 0;
1571 }
1572
1573 static int ida_revalidate(struct gendisk *disk)
1574 {
1575 drv_info_t *drv = disk->private_data;
1576 set_capacity(disk, drv->nr_blks);
1577 return 0;
1578 }
1579
1580 /********************************************************************
1581 name: pollcomplete
1582 Wait polling for a command to complete.
1583 The memory mapped FIFO is polled for the completion.
1584 Used only at init time, interrupts disabled.
1585 ********************************************************************/
1586 static int pollcomplete(int ctlr)
1587 {
1588 int done;
1589 int i;
1590
1591 /* Wait (up to 2 seconds) for a command to complete */
1592
1593 for (i = 200000; i > 0; i--) {
1594 done = hba[ctlr]->access.command_completed(hba[ctlr]);
1595 if (done == 0) {
1596 udelay(10); /* a short fixed delay */
1597 } else
1598 return (done);
1599 }
1600 /* Invalid address to tell caller we ran out of time */
1601 return 1;
1602 }
1603 /*****************************************************************
1604 start_fwbk
1605 Starts controller firmwares background processing.
1606 Currently only the Integrated Raid controller needs this done.
1607 If the PCI mem address registers are written to after this,
1608 data corruption may occur
1609 *****************************************************************/
1610 static void start_fwbk(int ctlr)
1611 {
1612 id_ctlr_t *id_ctlr_buf;
1613 int ret_code;
1614
1615 if( (hba[ctlr]->board_id != 0x40400E11)
1616 && (hba[ctlr]->board_id != 0x40480E11) )
1617
1618 /* Not a Integrated Raid, so there is nothing for us to do */
1619 return;
1620 printk(KERN_DEBUG "cpqarray: Starting firmware's background"
1621 " processing\n");
1622 /* Command does not return anything, but idasend command needs a
1623 buffer */
1624 id_ctlr_buf = kmalloc(sizeof(id_ctlr_t), GFP_KERNEL);
1625 if(id_ctlr_buf==NULL)
1626 {
1627 printk(KERN_WARNING "cpqarray: Out of memory. "
1628 "Unable to start background processing.\n");
1629 return;
1630 }
1631 ret_code = sendcmd(RESUME_BACKGROUND_ACTIVITY, ctlr,
1632 id_ctlr_buf, 0, 0, 0, 0);
1633 if(ret_code != IO_OK)
1634 printk(KERN_WARNING "cpqarray: Unable to start"
1635 " background processing\n");
1636
1637 kfree(id_ctlr_buf);
1638 }
1639 /*****************************************************************
1640 getgeometry
1641 Get ida logical volume geometry from the controller
1642 This is a large bit of code which once existed in two flavors,
1643 It is used only at init time.
1644 *****************************************************************/
1645 static void getgeometry(int ctlr)
1646 {
1647 id_log_drv_t *id_ldrive;
1648 id_ctlr_t *id_ctlr_buf;
1649 sense_log_drv_stat_t *id_lstatus_buf;
1650 config_t *sense_config_buf;
1651 unsigned int log_unit, log_index;
1652 int ret_code, size;
1653 drv_info_t *drv;
1654 ctlr_info_t *info_p = hba[ctlr];
1655 int i;
1656
1657 info_p->log_drv_map = 0;
1658
1659 id_ldrive = kzalloc(sizeof(id_log_drv_t), GFP_KERNEL);
1660 if (!id_ldrive) {
1661 printk( KERN_ERR "cpqarray: out of memory.\n");
1662 goto err_0;
1663 }
1664
1665 id_ctlr_buf = kzalloc(sizeof(id_ctlr_t), GFP_KERNEL);
1666 if (!id_ctlr_buf) {
1667 printk( KERN_ERR "cpqarray: out of memory.\n");
1668 goto err_1;
1669 }
1670
1671 id_lstatus_buf = kzalloc(sizeof(sense_log_drv_stat_t), GFP_KERNEL);
1672 if (!id_lstatus_buf) {
1673 printk( KERN_ERR "cpqarray: out of memory.\n");
1674 goto err_2;
1675 }
1676
1677 sense_config_buf = kzalloc(sizeof(config_t), GFP_KERNEL);
1678 if (!sense_config_buf) {
1679 printk( KERN_ERR "cpqarray: out of memory.\n");
1680 goto err_3;
1681 }
1682
1683 info_p->phys_drives = 0;
1684 info_p->log_drv_map = 0;
1685 info_p->drv_assign_map = 0;
1686 info_p->drv_spare_map = 0;
1687 info_p->mp_failed_drv_map = 0; /* only initialized here */
1688 /* Get controllers info for this logical drive */
1689 ret_code = sendcmd(ID_CTLR, ctlr, id_ctlr_buf, 0, 0, 0, 0);
1690 if (ret_code == IO_ERROR) {
1691 /*
1692 * If can't get controller info, set the logical drive map to 0,
1693 * so the idastubopen will fail on all logical drives
1694 * on the controller.
1695 */
1696 printk(KERN_ERR "cpqarray: error sending ID controller\n");
1697 goto err_4;
1698 }
1699
1700 info_p->log_drives = id_ctlr_buf->nr_drvs;
1701 for(i=0;i<4;i++)
1702 info_p->firm_rev[i] = id_ctlr_buf->firm_rev[i];
1703 info_p->ctlr_sig = id_ctlr_buf->cfg_sig;
1704
1705 printk(" (%s)\n", info_p->product_name);
1706 /*
1707 * Initialize logical drive map to zero
1708 */
1709 log_index = 0;
1710 /*
1711 * Get drive geometry for all logical drives
1712 */
1713 if (id_ctlr_buf->nr_drvs > 16)
1714 printk(KERN_WARNING "cpqarray ida%d: This driver supports "
1715 "16 logical drives per controller.\n. "
1716 " Additional drives will not be "
1717 "detected\n", ctlr);
1718
1719 for (log_unit = 0;
1720 (log_index < id_ctlr_buf->nr_drvs)
1721 && (log_unit < NWD);
1722 log_unit++) {
1723 size = sizeof(sense_log_drv_stat_t);
1724
1725 /*
1726 Send "Identify logical drive status" cmd
1727 */
1728 ret_code = sendcmd(SENSE_LOG_DRV_STAT,
1729 ctlr, id_lstatus_buf, size, 0, 0, log_unit);
1730 if (ret_code == IO_ERROR) {
1731 /*
1732 If can't get logical drive status, set
1733 the logical drive map to 0, so the
1734 idastubopen will fail for all logical drives
1735 on the controller.
1736 */
1737 info_p->log_drv_map = 0;
1738 printk( KERN_WARNING
1739 "cpqarray ida%d: idaGetGeometry - Controller"
1740 " failed to report status of logical drive %d\n"
1741 "Access to this controller has been disabled\n",
1742 ctlr, log_unit);
1743 goto err_4;
1744 }
1745 /*
1746 Make sure the logical drive is configured
1747 */
1748 if (id_lstatus_buf->status != LOG_NOT_CONF) {
1749 ret_code = sendcmd(ID_LOG_DRV, ctlr, id_ldrive,
1750 sizeof(id_log_drv_t), 0, 0, log_unit);
1751 /*
1752 If error, the bit for this
1753 logical drive won't be set and
1754 idastubopen will return error.
1755 */
1756 if (ret_code != IO_ERROR) {
1757 drv = &info_p->drv[log_unit];
1758 drv->blk_size = id_ldrive->blk_size;
1759 drv->nr_blks = id_ldrive->nr_blks;
1760 drv->cylinders = id_ldrive->drv.cyl;
1761 drv->heads = id_ldrive->drv.heads;
1762 drv->sectors = id_ldrive->drv.sect_per_track;
1763 info_p->log_drv_map |= (1 << log_unit);
1764
1765 printk(KERN_INFO "cpqarray ida/c%dd%d: blksz=%d nr_blks=%d\n",
1766 ctlr, log_unit, drv->blk_size, drv->nr_blks);
1767 ret_code = sendcmd(SENSE_CONFIG,
1768 ctlr, sense_config_buf,
1769 sizeof(config_t), 0, 0, log_unit);
1770 if (ret_code == IO_ERROR) {
1771 info_p->log_drv_map = 0;
1772 printk(KERN_ERR "cpqarray: error sending sense config\n");
1773 goto err_4;
1774 }
1775
1776 info_p->phys_drives =
1777 sense_config_buf->ctlr_phys_drv;
1778 info_p->drv_assign_map
1779 |= sense_config_buf->drv_asgn_map;
1780 info_p->drv_assign_map
1781 |= sense_config_buf->spare_asgn_map;
1782 info_p->drv_spare_map
1783 |= sense_config_buf->spare_asgn_map;
1784 } /* end of if no error on id_ldrive */
1785 log_index = log_index + 1;
1786 } /* end of if logical drive configured */
1787 } /* end of for log_unit */
1788
1789 /* Free all the buffers and return */
1790 err_4:
1791 kfree(sense_config_buf);
1792 err_3:
1793 kfree(id_lstatus_buf);
1794 err_2:
1795 kfree(id_ctlr_buf);
1796 err_1:
1797 kfree(id_ldrive);
1798 err_0:
1799 return;
1800 }
1801
1802 static void __exit cpqarray_exit(void)
1803 {
1804 int i;
1805
1806 pci_unregister_driver(&cpqarray_pci_driver);
1807
1808 /* Double check that all controller entries have been removed */
1809 for(i=0; i<MAX_CTLR; i++) {
1810 if (hba[i] != NULL) {
1811 printk(KERN_WARNING "cpqarray: Removing EISA "
1812 "controller %d\n", i);
1813 cpqarray_remove_one_eisa(i);
1814 }
1815 }
1816
1817 remove_proc_entry("driver/cpqarray", NULL);
1818 }
1819
1820 module_init(cpqarray_init)
1821 module_exit(cpqarray_exit)