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ieee1394: pcilynx: superfluous local variables
[deliverable/linux.git] / drivers / block / cpqarray.c
CommitLineData
1da177e4
LT		 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 */
1da177e4
LT		 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>
1da177e4
LT		 35#include <linux/init.h>
36#include <linux/hdreg.h>
37#include <linux/spinlock.h>
38#include <linux/blkdev.h>
39#include <linux/genhd.h>
40#include <asm/uaccess.h>
41#include <asm/io.h>
42
43
44#define SMART2_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
45
46#define DRIVER_NAME "Compaq SMART2 Driver (v 2.6.0)"
47#define DRIVER_VERSION SMART2_DRIVER_VERSION(2,6,0)
48
49/* Embedded module documentation macros - see modules.h */
50/* Original author Chris Frantz - Compaq Computer Corporation */
51MODULE_AUTHOR("Compaq Computer Corporation");
52MODULE_DESCRIPTION("Driver for Compaq Smart2 Array Controllers version 2.6.0");
53MODULE_LICENSE("GPL");
54
55#include "cpqarray.h"
56#include "ida_cmd.h"
57#include "smart1,2.h"
58#include "ida_ioctl.h"
59
60#define READ_AHEAD 128
61#define NR_CMDS 128 /* This could probably go as high as ~400 */
62
63#define MAX_CTLR 8
64#define CTLR_SHIFT 8
65
66#define CPQARRAY_DMA_MASK 0xFFFFFFFF /* 32 bit DMA */
67
68static int nr_ctlr;
69static ctlr_info_t *hba[MAX_CTLR];
70
71static int eisa[8];
72
945f390f 73#define NR_PRODUCTS ARRAY_SIZE(products)
1da177e4
LT		 74
75/* board_id = Subsystem Device ID & Vendor ID
76 * product = Marketing Name for the board
945f390f 77 * access = Address of the struct of function pointers
1da177e4
LT		 78 */
79static struct board_type products[] = {
80 { 0x0040110E, "IDA", &smart1_access },
81 { 0x0140110E, "IDA-2", &smart1_access },
82 { 0x1040110E, "IAES", &smart1_access },
83 { 0x2040110E, "SMART", &smart1_access },
84 { 0x3040110E, "SMART-2/E", &smart2e_access },
85 { 0x40300E11, "SMART-2/P", &smart2_access },
86 { 0x40310E11, "SMART-2SL", &smart2_access },
87 { 0x40320E11, "Smart Array 3200", &smart2_access },
88 { 0x40330E11, "Smart Array 3100ES", &smart2_access },
89 { 0x40340E11, "Smart Array 221", &smart2_access },
90 { 0x40400E11, "Integrated Array", &smart4_access },
91 { 0x40480E11, "Compaq Raid LC2", &smart4_access },
92 { 0x40500E11, "Smart Array 4200", &smart4_access },
93 { 0x40510E11, "Smart Array 4250ES", &smart4_access },
94 { 0x40580E11, "Smart Array 431", &smart4_access },
95};
96
97/* define the PCI info for the PCI cards this driver can control */
98static const struct pci_device_id cpqarray_pci_device_id[] =
99{
100 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
101 0x0E11, 0x4058, 0, 0, 0}, /* SA431 */
102 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
103 0x0E11, 0x4051, 0, 0, 0}, /* SA4250ES */
104 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
105 0x0E11, 0x4050, 0, 0, 0}, /* SA4200 */
106 { PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
107 0x0E11, 0x4048, 0, 0, 0}, /* LC2 */
108 { PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
109 0x0E11, 0x4040, 0, 0, 0}, /* Integrated Array */
110 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
111 0x0E11, 0x4034, 0, 0, 0}, /* SA 221 */
112 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
113 0x0E11, 0x4033, 0, 0, 0}, /* SA 3100ES*/
114 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
115 0x0E11, 0x4032, 0, 0, 0}, /* SA 3200*/
116 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
117 0x0E11, 0x4031, 0, 0, 0}, /* SA 2SL*/
118 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
119 0x0E11, 0x4030, 0, 0, 0}, /* SA 2P */
120 { 0 }
121};
122
123MODULE_DEVICE_TABLE(pci, cpqarray_pci_device_id);
124
125static struct gendisk *ida_gendisk[MAX_CTLR][NWD];
126
127/* Debug... */
128#define DBG(s) do { s } while(0)
129/* Debug (general info)... */
130#define DBGINFO(s) do { } while(0)
131/* Debug Paranoid... */
132#define DBGP(s) do { } while(0)
133/* Debug Extra Paranoid... */
134#define DBGPX(s) do { } while(0)
135
136static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev);
137static void __iomem *remap_pci_mem(ulong base, ulong size);
138static int cpqarray_eisa_detect(void);
139static int pollcomplete(int ctlr);
140static void getgeometry(int ctlr);
141static void start_fwbk(int ctlr);
142
143static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool);
144static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool);
145
146static void free_hba(int i);
147static int alloc_cpqarray_hba(void);
148
149static int sendcmd(
150 __u8 cmd,
151 int ctlr,
152 void *buff,
153 size_t size,
154 unsigned int blk,
155 unsigned int blkcnt,
156 unsigned int log_unit );
157
158static int ida_open(struct inode *inode, struct file *filep);
159static int ida_release(struct inode *inode, struct file *filep);
160static int ida_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, unsigned long arg);
a885c8c4 161static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4
LT		 162static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io);
163
165125e1 164static void do_ida_request(struct request_queue *q);
1da177e4
LT		 165static void start_io(ctlr_info_t *h);
166
167static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
168static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c);
169static inline void complete_buffers(struct bio *bio, int ok);
170static inline void complete_command(cmdlist_t *cmd, int timeout);
171
7d12e780 172static irqreturn_t do_ida_intr(int irq, void *dev_id);
1da177e4
LT		 173static void ida_timer(unsigned long tdata);
174static int ida_revalidate(struct gendisk *disk);
175static int revalidate_allvol(ctlr_info_t *host);
176static int cpqarray_register_ctlr(int ctlr, struct pci_dev *pdev);
177
178#ifdef CONFIG_PROC_FS
179static void ida_procinit(int i);
180static int ida_proc_get_info(char *buffer, char **start, off_t offset, int length, int *eof, void *data);
181#else
182static void ida_procinit(int i) {}
183#endif
184
185static inline drv_info_t *get_drv(struct gendisk *disk)
186{
187 return disk->private_data;
188}
189
190static inline ctlr_info_t *get_host(struct gendisk *disk)
191{
192 return disk->queue->queuedata;
193}
194
195
196static struct block_device_operations ida_fops = {
197 .owner = THIS_MODULE,
198 .open = ida_open,
199 .release = ida_release,
200 .ioctl = ida_ioctl,
a885c8c4 201 .getgeo = ida_getgeo,
1da177e4
LT		 202 .revalidate_disk= ida_revalidate,
203};
204
205
206#ifdef CONFIG_PROC_FS
207
208static struct proc_dir_entry *proc_array;
209
210/*
211 * Get us a file in /proc/array that says something about each controller.
212 * Create /proc/array if it doesn't exist yet.
213 */
214static void __init ida_procinit(int i)
215{
216 if (proc_array == NULL) {
217 proc_array = proc_mkdir("cpqarray", proc_root_driver);
218 if (!proc_array) return;
219 }
220
221 create_proc_read_entry(hba[i]->devname, 0, proc_array,
222 ida_proc_get_info, hba[i]);
223}
224
225/*
226 * Report information about this controller.
227 */
228static int ida_proc_get_info(char *buffer, char **start, off_t offset, int length, int *eof, void *data)
229{
230 off_t pos = 0;
231 off_t len = 0;
232 int size, i, ctlr;
233 ctlr_info_t *h = (ctlr_info_t*)data;
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 size = sprintf(buffer, "%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 pos += size; len += size;
262
263 size = sprintf(buffer+len, "Logical Drive Info:\n");
264 pos += size; len += size;
265
266 for(i=0; i<h->log_drives; i++) {
267 drv = &h->drv[i];
268 size = sprintf(buffer+len, "ida/c%dd%d: blksz=%d nr_blks=%d\n",
269 ctlr, i, drv->blk_size, drv->nr_blks);
270 pos += size; len += size;
271 }
272
273#ifdef CPQ_PROC_PRINT_QUEUES
274 spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
275 size = sprintf(buffer+len, "\nCurrent Queues:\n");
276 pos += size; len += size;
277
278 c = h->reqQ;
279 size = sprintf(buffer+len, "reqQ = %p", c); pos += size; len += size;
280 if (c) c=c->next;
281 while(c && c != h->reqQ) {
282 size = sprintf(buffer+len, "->%p", c);
283 pos += size; len += size;
284 c=c->next;
285 }
286
287 c = h->cmpQ;
288 size = sprintf(buffer+len, "\ncmpQ = %p", c); pos += size; len += size;
289 if (c) c=c->next;
290 while(c && c != h->cmpQ) {
291 size = sprintf(buffer+len, "->%p", c);
292 pos += size; len += size;
293 c=c->next;
294 }
295
296 size = sprintf(buffer+len, "\n"); pos += size; len += size;
297 spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags);
298#endif
299 size = sprintf(buffer+len, "nr_allocs = %d\nnr_frees = %d\n",
300 h->nr_allocs, h->nr_frees);
301 pos += size; len += size;
302
303 *eof = 1;
304 *start = buffer+offset;
305 len -= offset;
306 if (len>length)
307 len = length;
308 return len;
309}
310#endif /* CONFIG_PROC_FS */
311
312module_param_array(eisa, int, NULL, 0);
313
314static void release_io_mem(ctlr_info_t *c)
315{
316 /* if IO mem was not protected do nothing */
317 if( c->io_mem_addr == 0)
318 return;
319 release_region(c->io_mem_addr, c->io_mem_length);
320 c->io_mem_addr = 0;
321 c->io_mem_length = 0;
322}
323
324static void __devexit cpqarray_remove_one(int i)
325{
326 int j;
327 char buff[4];
328
329 /* sendcmd will turn off interrupt, and send the flush...
330 * To write all data in the battery backed cache to disks
331 * no data returned, but don't want to send NULL to sendcmd */
332 if( sendcmd(FLUSH_CACHE, i, buff, 4, 0, 0, 0))
333 {
334 printk(KERN_WARNING "Unable to flush cache on controller %d\n",
335 i);
336 }
337 free_irq(hba[i]->intr, hba[i]);
338 iounmap(hba[i]->vaddr);
339 unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
340 del_timer(&hba[i]->timer);
341 remove_proc_entry(hba[i]->devname, proc_array);
342 pci_free_consistent(hba[i]->pci_dev,
343 NR_CMDS * sizeof(cmdlist_t), (hba[i]->cmd_pool),
344 hba[i]->cmd_pool_dhandle);
345 kfree(hba[i]->cmd_pool_bits);
346 for(j = 0; j < NWD; j++) {
347 if (ida_gendisk[i][j]->flags & GENHD_FL_UP)
348 del_gendisk(ida_gendisk[i][j]);
1da177e4
LT		 349 put_disk(ida_gendisk[i][j]);
350 }
351 blk_cleanup_queue(hba[i]->queue);
352 release_io_mem(hba[i]);
353 free_hba(i);
354}
355
356static void __devexit cpqarray_remove_one_pci (struct pci_dev *pdev)
357{
358 int i;
359 ctlr_info_t *tmp_ptr;
360
361 if (pci_get_drvdata(pdev) == NULL) {
362 printk( KERN_ERR "cpqarray: Unable to remove device \n");
363 return;
364 }
365
366 tmp_ptr = pci_get_drvdata(pdev);
367 i = tmp_ptr->ctlr;
368 if (hba[i] == NULL) {
369 printk(KERN_ERR "cpqarray: controller %d appears to have"
370 "already been removed \n", i);
371 return;
372 }
373 pci_set_drvdata(pdev, NULL);
374
375 cpqarray_remove_one(i);
376}
377
378/* removing an instance that was not removed automatically..
379 * must be an eisa card.
380 */
381static void __devexit cpqarray_remove_one_eisa (int i)
382{
383 if (hba[i] == NULL) {
384 printk(KERN_ERR "cpqarray: controller %d appears to have"
385 "already been removed \n", i);
386 return;
387 }
388 cpqarray_remove_one(i);
389}
390
391/* pdev is NULL for eisa */
bc648638 392static int __init cpqarray_register_ctlr( int i, struct pci_dev *pdev)
1da177e4 393{
165125e1 394 struct request_queue *q;
1da177e4
LT		 395 int j;
396
397 /*
398 * register block devices
399 * Find disks and fill in structs
400 * Get an interrupt, set the Q depth and get into /proc
401 */
402
403 /* If this successful it should insure that we are the only */
404 /* instance of the driver */
405 if (register_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname)) {
406 goto Enomem4;
407 }
408 hba[i]->access.set_intr_mask(hba[i], 0);
409 if (request_irq(hba[i]->intr, do_ida_intr,
69ab3912 410 IRQF_DISABLED|IRQF_SHARED, hba[i]->devname, hba[i]))
1da177e4
LT		 411 {
412 printk(KERN_ERR "cpqarray: Unable to get irq %d for %s\n",
413 hba[i]->intr, hba[i]->devname);
414 goto Enomem3;
415 }
416
417 for (j=0; j<NWD; j++) {
418 ida_gendisk[i][j] = alloc_disk(1 << NWD_SHIFT);
419 if (!ida_gendisk[i][j])
420 goto Enomem2;
421 }
422
2e4934aa 423 hba[i]->cmd_pool = pci_alloc_consistent(
1da177e4
LT		 424 hba[i]->pci_dev, NR_CMDS * sizeof(cmdlist_t),
425 &(hba[i]->cmd_pool_dhandle));
2e4934aa
MK		 426 hba[i]->cmd_pool_bits = kcalloc(
427 (NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG, sizeof(unsigned long),
1da177e4
LT		 428 GFP_KERNEL);
429
430 if (!hba[i]->cmd_pool_bits || !hba[i]->cmd_pool)
431 goto Enomem1;
432
433 memset(hba[i]->cmd_pool, 0, NR_CMDS * sizeof(cmdlist_t));
1da177e4
LT		 434 printk(KERN_INFO "cpqarray: Finding drives on %s",
435 hba[i]->devname);
436
437 spin_lock_init(&hba[i]->lock);
438 q = blk_init_queue(do_ida_request, &hba[i]->lock);
439 if (!q)
440 goto Enomem1;
441
442 hba[i]->queue = q;
443 q->queuedata = hba[i];
444
445 getgeometry(i);
446 start_fwbk(i);
447
448 ida_procinit(i);
449
450 if (pdev)
451 blk_queue_bounce_limit(q, hba[i]->pci_dev->dma_mask);
452
453 /* This is a hardware imposed limit. */
454 blk_queue_max_hw_segments(q, SG_MAX);
455
456 /* This is a driver limit and could be eliminated. */
457 blk_queue_max_phys_segments(q, SG_MAX);
458
459 init_timer(&hba[i]->timer);
460 hba[i]->timer.expires = jiffies + IDA_TIMER;
461 hba[i]->timer.data = (unsigned long)hba[i];
462 hba[i]->timer.function = ida_timer;
463 add_timer(&hba[i]->timer);
464
465 /* Enable IRQ now that spinlock and rate limit timer are set up */
466 hba[i]->access.set_intr_mask(hba[i], FIFO_NOT_EMPTY);
467
468 for(j=0; j<NWD; j++) {
469 struct gendisk *disk = ida_gendisk[i][j];
470 drv_info_t *drv = &hba[i]->drv[j];
471 sprintf(disk->disk_name, "ida/c%dd%d", i, j);
472 disk->major = COMPAQ_SMART2_MAJOR + i;
473 disk->first_minor = j<<NWD_SHIFT;
474 disk->fops = &ida_fops;
475 if (j && !drv->nr_blks)
476 continue;
477 blk_queue_hardsect_size(hba[i]->queue, drv->blk_size);
478 set_capacity(disk, drv->nr_blks);
479 disk->queue = hba[i]->queue;
480 disk->private_data = drv;
481 add_disk(disk);
482 }
483
484 /* done ! */
485 return(i);
486
487Enomem1:
488 nr_ctlr = i;
489 kfree(hba[i]->cmd_pool_bits);
490 if (hba[i]->cmd_pool)
491 pci_free_consistent(hba[i]->pci_dev, NR_CMDS*sizeof(cmdlist_t),
492 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
493Enomem2:
494 while (j--) {
495 put_disk(ida_gendisk[i][j]);
496 ida_gendisk[i][j] = NULL;
497 }
498 free_irq(hba[i]->intr, hba[i]);
499Enomem3:
500 unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
501Enomem4:
502 if (pdev)
503 pci_set_drvdata(pdev, NULL);
504 release_io_mem(hba[i]);
505 free_hba(i);
506
507 printk( KERN_ERR "cpqarray: out of memory");
508
509 return -1;
510}
511
512static int __init cpqarray_init_one( struct pci_dev *pdev,
513 const struct pci_device_id *ent)
514{
515 int i;
516
517 printk(KERN_DEBUG "cpqarray: Device 0x%x has been found at"
518 " bus %d dev %d func %d\n",
519 pdev->device, pdev->bus->number, PCI_SLOT(pdev->devfn),
520 PCI_FUNC(pdev->devfn));
521 i = alloc_cpqarray_hba();
522 if( i < 0 )
523 return (-1);
524 memset(hba[i], 0, sizeof(ctlr_info_t));
525 sprintf(hba[i]->devname, "ida%d", i);
526 hba[i]->ctlr = i;
527 /* Initialize the pdev driver private data */
528 pci_set_drvdata(pdev, hba[i]);
529
530 if (cpqarray_pci_init(hba[i], pdev) != 0) {
531 pci_set_drvdata(pdev, NULL);
532 release_io_mem(hba[i]);
533 free_hba(i);
534 return -1;
535 }
536
537 return (cpqarray_register_ctlr(i, pdev));
538}
539
540static struct pci_driver cpqarray_pci_driver = {
541 .name = "cpqarray",
542 .probe = cpqarray_init_one,
543 .remove = __devexit_p(cpqarray_remove_one_pci),
544 .id_table = cpqarray_pci_device_id,
545};
546
547/*
548 * This is it. Find all the controllers and register them.
549 * returns the number of block devices registered.
550 */
551static int __init cpqarray_init(void)
552{
553 int num_cntlrs_reg = 0;
554 int i;
555 int rc = 0;
556
557 /* detect controllers */
558 printk(DRIVER_NAME "\n");
559
560 rc = pci_register_driver(&cpqarray_pci_driver);
561 if (rc)
562 return rc;
563 cpqarray_eisa_detect();
564
565 for (i=0; i < MAX_CTLR; i++) {
566 if (hba[i] != NULL)
567 num_cntlrs_reg++;
568 }
569
570 return(num_cntlrs_reg);
571}
572
573/* Function to find the first free pointer into our hba[] array */
574/* Returns -1 if no free entries are left. */
575static int alloc_cpqarray_hba(void)
576{
577 int i;
578
579 for(i=0; i< MAX_CTLR; i++) {
580 if (hba[i] == NULL) {
581 hba[i] = kmalloc(sizeof(ctlr_info_t), GFP_KERNEL);
582 if(hba[i]==NULL) {
583 printk(KERN_ERR "cpqarray: out of memory.\n");
584 return (-1);
585 }
586 return (i);
587 }
588 }
589 printk(KERN_WARNING "cpqarray: This driver supports a maximum"
590 " of 8 controllers.\n");
591 return(-1);
592}
593
594static void free_hba(int i)
595{
596 kfree(hba[i]);
597 hba[i]=NULL;
598}
599
600/*
601 * Find the IO address of the controller, its IRQ and so forth. Fill
602 * in some basic stuff into the ctlr_info_t structure.
603 */
604static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
605{
606 ushort vendor_id, device_id, command;
607 unchar cache_line_size, latency_timer;
608 unchar irq, revision;
609 unsigned long addr[6];
610 __u32 board_id;
611
612 int i;
613
614 c->pci_dev = pdev;
615 if (pci_enable_device(pdev)) {
616 printk(KERN_ERR "cpqarray: Unable to Enable PCI device\n");
617 return -1;
618 }
619 vendor_id = pdev->vendor;
620 device_id = pdev->device;
621 irq = pdev->irq;
622
623 for(i=0; i<6; i++)
624 addr[i] = pci_resource_start(pdev, i);
625
626 if (pci_set_dma_mask(pdev, CPQARRAY_DMA_MASK) != 0)
627 {
628 printk(KERN_ERR "cpqarray: Unable to set DMA mask\n");
629 return -1;
630 }
631
632 pci_read_config_word(pdev, PCI_COMMAND, &command);
633 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
634 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
635 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_timer);
636
637 pci_read_config_dword(pdev, 0x2c, &board_id);
638
639 /* check to see if controller has been disabled */
640 if(!(command & 0x02)) {
641 printk(KERN_WARNING
642 "cpqarray: controller appears to be disabled\n");
643 return(-1);
644 }
645
646DBGINFO(
647 printk("vendor_id = %x\n", vendor_id);
648 printk("device_id = %x\n", device_id);
649 printk("command = %x\n", command);
650 for(i=0; i<6; i++)
651 printk("addr[%d] = %lx\n", i, addr[i]);
652 printk("revision = %x\n", revision);
653 printk("irq = %x\n", irq);
654 printk("cache_line_size = %x\n", cache_line_size);
655 printk("latency_timer = %x\n", latency_timer);
656 printk("board_id = %x\n", board_id);
657);
658
659 c->intr = irq;
660
661 for(i=0; i<6; i++) {
662 if (pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO)
663 { /* IO space */
664 c->io_mem_addr = addr[i];
665 c->io_mem_length = pci_resource_end(pdev, i)
666 - pci_resource_start(pdev, i) + 1;
667 if(!request_region( c->io_mem_addr, c->io_mem_length,
668 "cpqarray"))
669 {
670 printk( KERN_WARNING "cpqarray I/O memory range already in use addr %lx length = %ld\n", c->io_mem_addr, c->io_mem_length);
671 c->io_mem_addr = 0;
672 c->io_mem_length = 0;
673 }
674 break;
675 }
676 }
677
678 c->paddr = 0;
679 for(i=0; i<6; i++)
680 if (!(pci_resource_flags(pdev, i) &
681 PCI_BASE_ADDRESS_SPACE_IO)) {
682 c->paddr = pci_resource_start (pdev, i);
683 break;
684 }
685 if (!c->paddr)
686 return -1;
687 c->vaddr = remap_pci_mem(c->paddr, 128);
688 if (!c->vaddr)
689 return -1;
690 c->board_id = board_id;
691
692 for(i=0; i<NR_PRODUCTS; i++) {
693 if (board_id == products[i].board_id) {
694 c->product_name = products[i].product_name;
695 c->access = *(products[i].access);
696 break;
697 }
698 }
699 if (i == NR_PRODUCTS) {
700 printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
701 " to access the SMART Array controller %08lx\n",
702 (unsigned long)board_id);
703 return -1;
704 }
705
706 return 0;
707}
708
709/*
710 * Map (physical) PCI mem into (virtual) kernel space
711 */
712static void __iomem *remap_pci_mem(ulong base, ulong size)
713{
714 ulong page_base = ((ulong) base) & PAGE_MASK;
715 ulong page_offs = ((ulong) base) - page_base;
716 void __iomem *page_remapped = ioremap(page_base, page_offs+size);
717
718 return (page_remapped ? (page_remapped + page_offs) : NULL);
719}
720
721#ifndef MODULE
722/*
723 * Config string is a comma separated set of i/o addresses of EISA cards.
724 */
725static int cpqarray_setup(char *str)
726{
727 int i, ints[9];
728
729 (void)get_options(str, ARRAY_SIZE(ints), ints);
730
731 for(i=0; i<ints[0] && i<8; i++)
732 eisa[i] = ints[i+1];
733 return 1;
734}
735
736__setup("smart2=", cpqarray_setup);
737
738#endif
739
740/*
741 * Find an EISA controller's signature. Set up an hba if we find it.
742 */
bc648638 743static int __init cpqarray_eisa_detect(void)
1da177e4
LT		 744{
745 int i=0, j;
746 __u32 board_id;
747 int intr;
748 int ctlr;
749 int num_ctlr = 0;
750
751 while(i<8 && eisa[i]) {
752 ctlr = alloc_cpqarray_hba();
753 if(ctlr == -1)
754 break;
755 board_id = inl(eisa[i]+0xC80);
756 for(j=0; j < NR_PRODUCTS; j++)
757 if (board_id == products[j].board_id)
758 break;
759
760 if (j == NR_PRODUCTS) {
761 printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
762 " to access the SMART Array controller %08lx\n", (unsigned long)board_id);
763 continue;
764 }
765
766 memset(hba[ctlr], 0, sizeof(ctlr_info_t));
767 hba[ctlr]->io_mem_addr = eisa[i];
768 hba[ctlr]->io_mem_length = 0x7FF;
769 if(!request_region(hba[ctlr]->io_mem_addr,
770 hba[ctlr]->io_mem_length,
771 "cpqarray"))
772 {
773 printk(KERN_WARNING "cpqarray: I/O range already in "
774 "use addr = %lx length = %ld\n",
775 hba[ctlr]->io_mem_addr,
776 hba[ctlr]->io_mem_length);
777 free_hba(ctlr);
778 continue;
779 }
780
781 /*
782 * Read the config register to find our interrupt
783 */
784 intr = inb(eisa[i]+0xCC0) >> 4;
785 if (intr & 1) intr = 11;
786 else if (intr & 2) intr = 10;
787 else if (intr & 4) intr = 14;
788 else if (intr & 8) intr = 15;
789
790 hba[ctlr]->intr = intr;
791 sprintf(hba[ctlr]->devname, "ida%d", nr_ctlr);
792 hba[ctlr]->product_name = products[j].product_name;
793 hba[ctlr]->access = *(products[j].access);
794 hba[ctlr]->ctlr = ctlr;
795 hba[ctlr]->board_id = board_id;
796 hba[ctlr]->pci_dev = NULL; /* not PCI */
797
798DBGINFO(
799 printk("i = %d, j = %d\n", i, j);
800 printk("irq = %x\n", intr);
801 printk("product name = %s\n", products[j].product_name);
802 printk("board_id = %x\n", board_id);
803);
804
805 num_ctlr++;
806 i++;
807
808 if (cpqarray_register_ctlr(ctlr, NULL) == -1)
809 printk(KERN_WARNING
810 "cpqarray: Can't register EISA controller %d\n",
811 ctlr);
812
813 }
814
815 return num_ctlr;
816}
817
818/*
819 * Open. Make sure the device is really there.
820 */
821static int ida_open(struct inode *inode, struct file *filep)
822{
823 drv_info_t *drv = get_drv(inode->i_bdev->bd_disk);
824 ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
825
826 DBGINFO(printk("ida_open %s\n", inode->i_bdev->bd_disk->disk_name));
827 /*
828 * Root is allowed to open raw volume zero even if it's not configured
829 * so array config can still work. I don't think I really like this,
830 * but I'm already using way to many device nodes to claim another one
831 * for "raw controller".
832 */
833 if (!drv->nr_blks) {
834 if (!capable(CAP_SYS_RAWIO))
835 return -ENXIO;
836 if (!capable(CAP_SYS_ADMIN) && drv != host->drv)
837 return -ENXIO;
838 }
839 host->usage_count++;
840 return 0;
841}
842
843/*
844 * Close. Sync first.
845 */
846static int ida_release(struct inode *inode, struct file *filep)
847{
848 ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
849 host->usage_count--;
850 return 0;
851}
852
853/*
854 * Enqueuing and dequeuing functions for cmdlists.
855 */
856static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c)
857{
858 if (*Qptr == NULL) {
859 *Qptr = c;
860 c->next = c->prev = c;
861 } else {
862 c->prev = (*Qptr)->prev;
863 c->next = (*Qptr);
864 (*Qptr)->prev->next = c;
865 (*Qptr)->prev = c;
866 }
867}
868
869static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c)
870{
871 if (c && c->next != c) {
872 if (*Qptr == c) *Qptr = c->next;
873 c->prev->next = c->next;
874 c->next->prev = c->prev;
875 } else {
876 *Qptr = NULL;
877 }
878 return c;
879}
880
881/*
882 * Get a request and submit it to the controller.
883 * This routine needs to grab all the requests it possibly can from the
884 * req Q and submit them. Interrupts are off (and need to be off) when you
885 * are in here (either via the dummy do_ida_request functions or by being
886 * called from the interrupt handler
887 */
165125e1 888static void do_ida_request(struct request_queue *q)
1da177e4
LT		 889{
890 ctlr_info_t *h = q->queuedata;
891 cmdlist_t *c;
892 struct request *creq;
893 struct scatterlist tmp_sg[SG_MAX];
894 int i, dir, seg;
895
896 if (blk_queue_plugged(q))
897 goto startio;
898
899queue_next:
900 creq = elv_next_request(q);
901 if (!creq)
902 goto startio;
903
089fe1b2 904 BUG_ON(creq->nr_phys_segments > SG_MAX);
1da177e4
LT		 905
906 if ((c = cmd_alloc(h,1)) == NULL)
907 goto startio;
908
909 blkdev_dequeue_request(creq);
910
911 c->ctlr = h->ctlr;
912 c->hdr.unit = (drv_info_t *)(creq->rq_disk->private_data) - h->drv;
913 c->hdr.size = sizeof(rblk_t) >> 2;
914 c->size += sizeof(rblk_t);
915
916 c->req.hdr.blk = creq->sector;
917 c->rq = creq;
918DBGPX(
919 printk("sector=%d, nr_sectors=%d\n", creq->sector, creq->nr_sectors);
920);
921 seg = blk_rq_map_sg(q, creq, tmp_sg);
922
923 /* Now do all the DMA Mappings */
924 if (rq_data_dir(creq) == READ)
925 dir = PCI_DMA_FROMDEVICE;
926 else
927 dir = PCI_DMA_TODEVICE;
928 for( i=0; i < seg; i++)
929 {
930 c->req.sg[i].size = tmp_sg[i].length;
931 c->req.sg[i].addr = (__u32) pci_map_page(h->pci_dev,
932 tmp_sg[i].page,
933 tmp_sg[i].offset,
934 tmp_sg[i].length, dir);
935 }
936DBGPX( printk("Submitting %d sectors in %d segments\n", creq->nr_sectors, seg); );
937 c->req.hdr.sg_cnt = seg;
938 c->req.hdr.blk_cnt = creq->nr_sectors;
939 c->req.hdr.cmd = (rq_data_dir(creq) == READ) ? IDA_READ : IDA_WRITE;
940 c->type = CMD_RWREQ;
941
942 /* Put the request on the tail of the request queue */
943 addQ(&h->reqQ, c);
944 h->Qdepth++;
945 if (h->Qdepth > h->maxQsinceinit)
946 h->maxQsinceinit = h->Qdepth;
947
948 goto queue_next;
949
950startio:
951 start_io(h);
952}
953
954/*
955 * start_io submits everything on a controller's request queue
956 * and moves it to the completion queue.
957 *
958 * Interrupts had better be off if you're in here
959 */
960static void start_io(ctlr_info_t *h)
961{
962 cmdlist_t *c;
963
964 while((c = h->reqQ) != NULL) {
965 /* Can't do anything if we're busy */
966 if (h->access.fifo_full(h) == 0)
967 return;
968
969 /* Get the first entry from the request Q */
970 removeQ(&h->reqQ, c);
971 h->Qdepth--;
972
973 /* Tell the controller to do our bidding */
974 h->access.submit_command(h, c);
975
976 /* Get onto the completion Q */
977 addQ(&h->cmpQ, c);
978 }
979}
980
981static inline void complete_buffers(struct bio *bio, int ok)
982{
983 struct bio *xbh;
1da177e4 984
87ad9001 985 while (bio) {
1da177e4
LT		 986 xbh = bio->bi_next;
987 bio->bi_next = NULL;
988
6712ecf8 989 bio_endio(bio, ok ? 0 : -EIO);
1da177e4
LT		 990
991 bio = xbh;
992 }
993}
994/*
995 * Mark all buffers that cmd was responsible for
996 */
997static inline void complete_command(cmdlist_t *cmd, int timeout)
998{
1f794b60 999 struct request *rq = cmd->rq;
1da177e4
LT		 1000 int ok=1;
1001 int i, ddir;
1002
1003 if (cmd->req.hdr.rcode & RCODE_NONFATAL &&
1004 (hba[cmd->ctlr]->misc_tflags & MISC_NONFATAL_WARN) == 0) {
1005 printk(KERN_NOTICE "Non Fatal error on ida/c%dd%d\n",
1006 cmd->ctlr, cmd->hdr.unit);
1007 hba[cmd->ctlr]->misc_tflags |= MISC_NONFATAL_WARN;
1008 }
1009 if (cmd->req.hdr.rcode & RCODE_FATAL) {
1010 printk(KERN_WARNING "Fatal error on ida/c%dd%d\n",
1011 cmd->ctlr, cmd->hdr.unit);
1012 ok = 0;
1013 }
1014 if (cmd->req.hdr.rcode & RCODE_INVREQ) {
1015 printk(KERN_WARNING "Invalid request on ida/c%dd%d = (cmd=%x sect=%d cnt=%d sg=%d ret=%x)\n",
1016 cmd->ctlr, cmd->hdr.unit, cmd->req.hdr.cmd,
1017 cmd->req.hdr.blk, cmd->req.hdr.blk_cnt,
1018 cmd->req.hdr.sg_cnt, cmd->req.hdr.rcode);
1019 ok = 0;
1020 }
1021 if (timeout) ok = 0;
1022 /* unmap the DMA mapping for all the scatter gather elements */
1023 if (cmd->req.hdr.cmd == IDA_READ)
1024 ddir = PCI_DMA_FROMDEVICE;
1025 else
1026 ddir = PCI_DMA_TODEVICE;
1027 for(i=0; i<cmd->req.hdr.sg_cnt; i++)
1028 pci_unmap_page(hba[cmd->ctlr]->pci_dev, cmd->req.sg[i].addr,
1029 cmd->req.sg[i].size, ddir);
1030
1f794b60 1031 complete_buffers(rq->bio, ok);
1da177e4 1032
1f794b60
JA		 1033 if (blk_fs_request(rq)) {
1034 const int rw = rq_data_dir(rq);
0f41a53a 1035
1f794b60
JA		 1036 disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
1037 }
1038
1039 add_disk_randomness(rq->rq_disk);
1040
1041 DBGPX(printk("Done with %p\n", rq););
1042 end_that_request_last(rq, ok ? 1 : -EIO);
1da177e4
LT		 1043}
1044
1045/*
1046 * The controller will interrupt us upon completion of commands.
1047 * Find the command on the completion queue, remove it, tell the OS and
1048 * try to queue up more IO
1049 */
7d12e780 1050static irqreturn_t do_ida_intr(int irq, void *dev_id)
1da177e4
LT		 1051{
1052 ctlr_info_t *h = dev_id;
1053 cmdlist_t *c;
1054 unsigned long istat;
1055 unsigned long flags;
1056 __u32 a,a1;
1057
1058 istat = h->access.intr_pending(h);
1059 /* Is this interrupt for us? */
1060 if (istat == 0)
1061 return IRQ_NONE;
1062
1063 /*
1064 * If there are completed commands in the completion queue,
1065 * we had better do something about it.
1066 */
1067 spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
1068 if (istat & FIFO_NOT_EMPTY) {
1069 while((a = h->access.command_completed(h))) {
1070 a1 = a; a &= ~3;
1071 if ((c = h->cmpQ) == NULL)
1072 {
1073 printk(KERN_WARNING "cpqarray: Completion of %08lx ignored\n", (unsigned long)a1);
1074 continue;
1075 }
1076 while(c->busaddr != a) {
1077 c = c->next;
1078 if (c == h->cmpQ)
1079 break;
1080 }
1081 /*
1082 * If we've found the command, take it off the
1083 * completion Q and free it
1084 */
1085 if (c->busaddr == a) {
1086 removeQ(&h->cmpQ, c);
1087 /* Check for invalid command.
1088 * Controller returns command error,
1089 * But rcode = 0.
1090 */
1091
1092 if((a1 & 0x03) && (c->req.hdr.rcode == 0))
1093 {
1094 c->req.hdr.rcode = RCODE_INVREQ;
1095 }
1096 if (c->type == CMD_RWREQ) {
1097 complete_command(c, 0);
1098 cmd_free(h, c, 1);
1099 } else if (c->type == CMD_IOCTL_PEND) {
1100 c->type = CMD_IOCTL_DONE;
1101 }
1102 continue;
1103 }
1104 }
1105 }
1106
1107 /*
1108 * See if we can queue up some more IO
1109 */
1110 do_ida_request(h->queue);
1111 spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags);
1112 return IRQ_HANDLED;
1113}
1114
1115/*
1116 * This timer was for timing out requests that haven't happened after
1117 * IDA_TIMEOUT. That wasn't such a good idea. This timer is used to
1118 * reset a flags structure so we don't flood the user with
1119 * "Non-Fatal error" messages.
1120 */
1121static void ida_timer(unsigned long tdata)
1122{
1123 ctlr_info_t *h = (ctlr_info_t*)tdata;
1124
1125 h->timer.expires = jiffies + IDA_TIMER;
1126 add_timer(&h->timer);
1127 h->misc_tflags = 0;
1128}
1129
a885c8c4
CH		 1130static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1131{
1132 drv_info_t *drv = get_drv(bdev->bd_disk);
1133
1134 if (drv->cylinders) {
1135 geo->heads = drv->heads;
1136 geo->sectors = drv->sectors;
1137 geo->cylinders = drv->cylinders;
1138 } else {
1139 geo->heads = 0xff;
1140 geo->sectors = 0x3f;
1141 geo->cylinders = drv->nr_blks / (0xff*0x3f);
1142 }
1143
1144 return 0;
1145}
1146
1da177e4
LT		 1147/*
1148 * ida_ioctl does some miscellaneous stuff like reporting drive geometry,
1149 * setting readahead and submitting commands from userspace to the controller.
1150 */
1151static int ida_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, unsigned long arg)
1152{
1153 drv_info_t *drv = get_drv(inode->i_bdev->bd_disk);
1154 ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
1155 int error;
1da177e4
LT		 1156 ida_ioctl_t __user *io = (ida_ioctl_t __user *)arg;
1157 ida_ioctl_t *my_io;
1158
1159 switch(cmd) {
1da177e4
LT		 1160 case IDAGETDRVINFO:
1161 if (copy_to_user(&io->c.drv, drv, sizeof(drv_info_t)))
1162 return -EFAULT;
1163 return 0;
1164 case IDAPASSTHRU:
1165 if (!capable(CAP_SYS_RAWIO))
1166 return -EPERM;
1167 my_io = kmalloc(sizeof(ida_ioctl_t), GFP_KERNEL);
1168 if (!my_io)
1169 return -ENOMEM;
1170 error = -EFAULT;
1171 if (copy_from_user(my_io, io, sizeof(*my_io)))
1172 goto out_passthru;
1173 error = ida_ctlr_ioctl(host, drv - host->drv, my_io);
1174 if (error)
1175 goto out_passthru;
1176 error = -EFAULT;
1177 if (copy_to_user(io, my_io, sizeof(*my_io)))
1178 goto out_passthru;
1179 error = 0;
1180out_passthru:
1181 kfree(my_io);
1182 return error;
1183 case IDAGETCTLRSIG:
1184 if (!arg) return -EINVAL;
1185 put_user(host->ctlr_sig, (int __user *)arg);
1186 return 0;
1187 case IDAREVALIDATEVOLS:
1188 if (iminor(inode) != 0)
1189 return -ENXIO;
1190 return revalidate_allvol(host);
1191 case IDADRIVERVERSION:
1192 if (!arg) return -EINVAL;
1193 put_user(DRIVER_VERSION, (unsigned long __user *)arg);
1194 return 0;
1195 case IDAGETPCIINFO:
1196 {
1197
1198 ida_pci_info_struct pciinfo;
1199
1200 if (!arg) return -EINVAL;
1201 pciinfo.bus = host->pci_dev->bus->number;
1202 pciinfo.dev_fn = host->pci_dev->devfn;
1203 pciinfo.board_id = host->board_id;
1204 if(copy_to_user((void __user *) arg, &pciinfo,
1205 sizeof( ida_pci_info_struct)))
1206 return -EFAULT;
1207 return(0);
1208 }
1209
1210 default:
1211 return -EINVAL;
1212 }
1213
1214}
1215/*
1216 * ida_ctlr_ioctl is for passing commands to the controller from userspace.
1217 * The command block (io) has already been copied to kernel space for us,
1218 * however, any elements in the sglist need to be copied to kernel space
1219 * or copied back to userspace.
1220 *
1221 * Only root may perform a controller passthru command, however I'm not doing
1222 * any serious sanity checking on the arguments. Doing an IDA_WRITE_MEDIA and
1223 * putting a 64M buffer in the sglist is probably a *bad* idea.
1224 */
1225static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
1226{
1227 int ctlr = h->ctlr;
1228 cmdlist_t *c;
1229 void *p = NULL;
1230 unsigned long flags;
1231 int error;
1232
1233 if ((c = cmd_alloc(h, 0)) == NULL)
1234 return -ENOMEM;
1235 c->ctlr = ctlr;
1236 c->hdr.unit = (io->unit & UNITVALID) ? (io->unit & ~UNITVALID) : dsk;
1237 c->hdr.size = sizeof(rblk_t) >> 2;
1238 c->size += sizeof(rblk_t);
1239
1240 c->req.hdr.cmd = io->cmd;
1241 c->req.hdr.blk = io->blk;
1242 c->req.hdr.blk_cnt = io->blk_cnt;
1243 c->type = CMD_IOCTL_PEND;
1244
1245 /* Pre submit processing */
1246 switch(io->cmd) {
1247 case PASSTHRU_A:
1248 p = kmalloc(io->sg[0].size, GFP_KERNEL);
1249 if (!p)
1250 {
1251 error = -ENOMEM;
1252 cmd_free(h, c, 0);
1253 return(error);
1254 }
1255 if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
1256 kfree(p);
1257 cmd_free(h, c, 0);
1258 return -EFAULT;
1259 }
1260 c->req.hdr.blk = pci_map_single(h->pci_dev, &(io->c),
1261 sizeof(ida_ioctl_t),
1262 PCI_DMA_BIDIRECTIONAL);
1263 c->req.sg[0].size = io->sg[0].size;
1264 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1265 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1266 c->req.hdr.sg_cnt = 1;
1267 break;
1268 case IDA_READ:
1269 case READ_FLASH_ROM:
1270 case SENSE_CONTROLLER_PERFORMANCE:
1271 p = kmalloc(io->sg[0].size, GFP_KERNEL);
1272 if (!p)
1273 {
1274 error = -ENOMEM;
1275 cmd_free(h, c, 0);
1276 return(error);
1277 }
1278
1279 c->req.sg[0].size = io->sg[0].size;
1280 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1281 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1282 c->req.hdr.sg_cnt = 1;
1283 break;
1284 case IDA_WRITE:
1285 case IDA_WRITE_MEDIA:
1286 case DIAG_PASS_THRU:
1287 case COLLECT_BUFFER:
1288 case WRITE_FLASH_ROM:
1289 p = kmalloc(io->sg[0].size, GFP_KERNEL);
1290 if (!p)
1291 {
1292 error = -ENOMEM;
1293 cmd_free(h, c, 0);
1294 return(error);
1295 }
1296 if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
1297 kfree(p);
1298 cmd_free(h, c, 0);
1299 return -EFAULT;
1300 }
1301 c->req.sg[0].size = io->sg[0].size;
1302 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1303 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1304 c->req.hdr.sg_cnt = 1;
1305 break;
1306 default:
1307 c->req.sg[0].size = sizeof(io->c);
1308 c->req.sg[0].addr = pci_map_single(h->pci_dev,&io->c,
1309 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1310 c->req.hdr.sg_cnt = 1;
1311 }
1312
1313 /* Put the request on the tail of the request queue */
1314 spin_lock_irqsave(IDA_LOCK(ctlr), flags);
1315 addQ(&h->reqQ, c);
1316 h->Qdepth++;
1317 start_io(h);
1318 spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1319
1320 /* Wait for completion */
1321 while(c->type != CMD_IOCTL_DONE)
1322 schedule();
1323
1324 /* Unmap the DMA */
1325 pci_unmap_single(h->pci_dev, c->req.sg[0].addr, c->req.sg[0].size,
1326 PCI_DMA_BIDIRECTIONAL);
1327 /* Post submit processing */
1328 switch(io->cmd) {
1329 case PASSTHRU_A:
1330 pci_unmap_single(h->pci_dev, c->req.hdr.blk,
1331 sizeof(ida_ioctl_t),
1332 PCI_DMA_BIDIRECTIONAL);
1333 case IDA_READ:
1334 case DIAG_PASS_THRU:
1335 case SENSE_CONTROLLER_PERFORMANCE:
1336 case READ_FLASH_ROM:
1337 if (copy_to_user(io->sg[0].addr, p, io->sg[0].size)) {
1338 kfree(p);
1339 return -EFAULT;
1340 }
1341 /* fall through and free p */
1342 case IDA_WRITE:
1343 case IDA_WRITE_MEDIA:
1344 case COLLECT_BUFFER:
1345 case WRITE_FLASH_ROM:
1346 kfree(p);
1347 break;
1348 default:;
1349 /* Nothing to do */
1350 }
1351
1352 io->rcode = c->req.hdr.rcode;
1353 cmd_free(h, c, 0);
1354 return(0);
1355}
1356
1357/*
1358 * Commands are pre-allocated in a large block. Here we use a simple bitmap
1359 * scheme to suballocte them to the driver. Operations that are not time
1360 * critical (and can wait for kmalloc and possibly sleep) can pass in NULL
1361 * as the first argument to get a new command.
1362 */
1363static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool)
1364{
1365 cmdlist_t * c;
1366 int i;
1367 dma_addr_t cmd_dhandle;
1368
1369 if (!get_from_pool) {
1370 c = (cmdlist_t*)pci_alloc_consistent(h->pci_dev,
1371 sizeof(cmdlist_t), &cmd_dhandle);
1372 if(c==NULL)
1373 return NULL;
1374 } else {
1375 do {
1376 i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
1377 if (i == NR_CMDS)
1378 return NULL;
1379 } while(test_and_set_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG)) != 0);
1380 c = h->cmd_pool + i;
1381 cmd_dhandle = h->cmd_pool_dhandle + i*sizeof(cmdlist_t);
1382 h->nr_allocs++;
1383 }
1384
1385 memset(c, 0, sizeof(cmdlist_t));
1386 c->busaddr = cmd_dhandle;
1387 return c;
1388}
1389
1390static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool)
1391{
1392 int i;
1393
1394 if (!got_from_pool) {
1395 pci_free_consistent(h->pci_dev, sizeof(cmdlist_t), c,
1396 c->busaddr);
1397 } else {
1398 i = c - h->cmd_pool;
1399 clear_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG));
1400 h->nr_frees++;
1401 }
1402}
1403
1404/***********************************************************************
1405 name: sendcmd
1406 Send a command to an IDA using the memory mapped FIFO interface
1407 and wait for it to complete.
1408 This routine should only be called at init time.
1409***********************************************************************/
1410static int sendcmd(
1411 __u8 cmd,
1412 int ctlr,
1413 void *buff,
1414 size_t size,
1415 unsigned int blk,
1416 unsigned int blkcnt,
1417 unsigned int log_unit )
1418{
1419 cmdlist_t *c;
1420 int complete;
1421 unsigned long temp;
1422 unsigned long i;
1423 ctlr_info_t *info_p = hba[ctlr];
1424
1425 c = cmd_alloc(info_p, 1);
1426 if(!c)
1427 return IO_ERROR;
1428 c->ctlr = ctlr;
1429 c->hdr.unit = log_unit;
1430 c->hdr.prio = 0;
1431 c->hdr.size = sizeof(rblk_t) >> 2;
1432 c->size += sizeof(rblk_t);
1433
1434 /* The request information. */
1435 c->req.hdr.next = 0;
1436 c->req.hdr.rcode = 0;
1437 c->req.bp = 0;
1438 c->req.hdr.sg_cnt = 1;
1439 c->req.hdr.reserved = 0;
1440
1441 if (size == 0)
1442 c->req.sg[0].size = 512;
1443 else
1444 c->req.sg[0].size = size;
1445
1446 c->req.hdr.blk = blk;
1447 c->req.hdr.blk_cnt = blkcnt;
1448 c->req.hdr.cmd = (unsigned char) cmd;
1449 c->req.sg[0].addr = (__u32) pci_map_single(info_p->pci_dev,
1450 buff, c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1451 /*
1452 * Disable interrupt
1453 */
1454 info_p->access.set_intr_mask(info_p, 0);
1455 /* Make sure there is room in the command FIFO */
1456 /* Actually it should be completely empty at this time. */
1457 for (i = 200000; i > 0; i--) {
1458 temp = info_p->access.fifo_full(info_p);
1459 if (temp != 0) {
1460 break;
1461 }
1462 udelay(10);
1463DBG(
1464 printk(KERN_WARNING "cpqarray ida%d: idaSendPciCmd FIFO full,"
1465 " waiting!\n", ctlr);
1466);
1467 }
1468 /*
1469 * Send the cmd
1470 */
1471 info_p->access.submit_command(info_p, c);
1472 complete = pollcomplete(ctlr);
1473
1474 pci_unmap_single(info_p->pci_dev, (dma_addr_t) c->req.sg[0].addr,
1475 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1476 if (complete != 1) {
1477 if (complete != c->busaddr) {
1478 printk( KERN_WARNING
1479 "cpqarray ida%d: idaSendPciCmd "
1480 "Invalid command list address returned! (%08lx)\n",
1481 ctlr, (unsigned long)complete);
1482 cmd_free(info_p, c, 1);
1483 return (IO_ERROR);
1484 }
1485 } else {
1486 printk( KERN_WARNING
1487 "cpqarray ida%d: idaSendPciCmd Timeout out, "
1488 "No command list address returned!\n",
1489 ctlr);
1490 cmd_free(info_p, c, 1);
1491 return (IO_ERROR);
1492 }
1493
1494 if (c->req.hdr.rcode & 0x00FE) {
1495 if (!(c->req.hdr.rcode & BIG_PROBLEM)) {
1496 printk( KERN_WARNING
1497 "cpqarray ida%d: idaSendPciCmd, error: "
1498 "Controller failed at init time "
1499 "cmd: 0x%x, return code = 0x%x\n",
1500 ctlr, c->req.hdr.cmd, c->req.hdr.rcode);
1501
1502 cmd_free(info_p, c, 1);
1503 return (IO_ERROR);
1504 }
1505 }
1506 cmd_free(info_p, c, 1);
1507 return (IO_OK);
1508}
1509
1510/*
1511 * revalidate_allvol is for online array config utilities. After a
1512 * utility reconfigures the drives in the array, it can use this function
1513 * (through an ioctl) to make the driver zap any previous disk structs for
1514 * that controller and get new ones.
1515 *
1516 * Right now I'm using the getgeometry() function to do this, but this
1517 * function should probably be finer grained and allow you to revalidate one
1518 * particualar logical volume (instead of all of them on a particular
1519 * controller).
1520 */
1521static int revalidate_allvol(ctlr_info_t *host)
1522{
1523 int ctlr = host->ctlr;
1524 int i;
1525 unsigned long flags;
1526
1527 spin_lock_irqsave(IDA_LOCK(ctlr), flags);
1528 if (host->usage_count > 1) {
1529 spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1530 printk(KERN_WARNING "cpqarray: Device busy for volume"
1531 " revalidation (usage=%d)\n", host->usage_count);
1532 return -EBUSY;
1533 }
1534 host->usage_count++;
1535 spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1536
1537 /*
1538 * Set the partition and block size structures for all volumes
1539 * on this controller to zero. We will reread all of this data
1540 */
1541 set_capacity(ida_gendisk[ctlr][0], 0);
1542 for (i = 1; i < NWD; i++) {
1543 struct gendisk *disk = ida_gendisk[ctlr][i];
1544 if (disk->flags & GENHD_FL_UP)
1545 del_gendisk(disk);
1546 }
1547 memset(host->drv, 0, sizeof(drv_info_t)*NWD);
1548
1549 /*
1550 * Tell the array controller not to give us any interrupts while
1551 * we check the new geometry. Then turn interrupts back on when
1552 * we're done.
1553 */
1554 host->access.set_intr_mask(host, 0);
1555 getgeometry(ctlr);
1556 host->access.set_intr_mask(host, FIFO_NOT_EMPTY);
1557
1558 for(i=0; i<NWD; i++) {
1559 struct gendisk *disk = ida_gendisk[ctlr][i];
1560 drv_info_t *drv = &host->drv[i];
1561 if (i && !drv->nr_blks)
1562 continue;
1563 blk_queue_hardsect_size(host->queue, drv->blk_size);
1564 set_capacity(disk, drv->nr_blks);
1565 disk->queue = host->queue;
1566 disk->private_data = drv;
1567 if (i)
1568 add_disk(disk);
1569 }
1570
1571 host->usage_count--;
1572 return 0;
1573}
1574
1575static int ida_revalidate(struct gendisk *disk)
1576{
1577 drv_info_t *drv = disk->private_data;
1578 set_capacity(disk, drv->nr_blks);
1579 return 0;
1580}
1581
1582/********************************************************************
1583 name: pollcomplete
1584 Wait polling for a command to complete.
1585 The memory mapped FIFO is polled for the completion.
1586 Used only at init time, interrupts disabled.
1587 ********************************************************************/
1588static int pollcomplete(int ctlr)
1589{
1590 int done;
1591 int i;
1592
1593 /* Wait (up to 2 seconds) for a command to complete */
1594
1595 for (i = 200000; i > 0; i--) {
1596 done = hba[ctlr]->access.command_completed(hba[ctlr]);
1597 if (done == 0) {
1598 udelay(10); /* a short fixed delay */
1599 } else
1600 return (done);
1601 }
1602 /* Invalid address to tell caller we ran out of time */
1603 return 1;
1604}
1605/*****************************************************************
1606 start_fwbk
1607 Starts controller firmwares background processing.
1608 Currently only the Integrated Raid controller needs this done.
1609 If the PCI mem address registers are written to after this,
1610 data corruption may occur
1611*****************************************************************/
1612static void start_fwbk(int ctlr)
1613{
1614 id_ctlr_t *id_ctlr_buf;
1615 int ret_code;
1616
1617 if( (hba[ctlr]->board_id != 0x40400E11)
1618 && (hba[ctlr]->board_id != 0x40480E11) )
1619
1620 /* Not a Integrated Raid, so there is nothing for us to do */
1621 return;
1622 printk(KERN_DEBUG "cpqarray: Starting firmware's background"
1623 " processing\n");
1624 /* Command does not return anything, but idasend command needs a
1625 buffer */
5cbded58 1626 id_ctlr_buf = kmalloc(sizeof(id_ctlr_t), GFP_KERNEL);
1da177e4
LT		 1627 if(id_ctlr_buf==NULL)
1628 {
1629 printk(KERN_WARNING "cpqarray: Out of memory. "
1630 "Unable to start background processing.\n");
1631 return;
1632 }
1633 ret_code = sendcmd(RESUME_BACKGROUND_ACTIVITY, ctlr,
1634 id_ctlr_buf, 0, 0, 0, 0);
1635 if(ret_code != IO_OK)
1636 printk(KERN_WARNING "cpqarray: Unable to start"
1637 " background processing\n");
1638
1639 kfree(id_ctlr_buf);
1640}
1641/*****************************************************************
1642 getgeometry
1643 Get ida logical volume geometry from the controller
1644 This is a large bit of code which once existed in two flavors,
1645 It is used only at init time.
1646*****************************************************************/
1647static void getgeometry(int ctlr)
1648{
1649 id_log_drv_t *id_ldrive;
1650 id_ctlr_t *id_ctlr_buf;
1651 sense_log_drv_stat_t *id_lstatus_buf;
1652 config_t *sense_config_buf;
1653 unsigned int log_unit, log_index;
1654 int ret_code, size;
1655 drv_info_t *drv;
1656 ctlr_info_t *info_p = hba[ctlr];
1657 int i;
1658
1659 info_p->log_drv_map = 0;
1660
2e4934aa
MK		 1661 id_ldrive = kzalloc(sizeof(id_log_drv_t), GFP_KERNEL);
1662 if (!id_ldrive) {
1da177e4 1663 printk( KERN_ERR "cpqarray: out of memory.\n");
2e4934aa 1664 goto err_0;
1da177e4
LT		 1665 }
1666
2e4934aa
MK		 1667 id_ctlr_buf = kzalloc(sizeof(id_ctlr_t), GFP_KERNEL);
1668 if (!id_ctlr_buf) {
1da177e4 1669 printk( KERN_ERR "cpqarray: out of memory.\n");
2e4934aa 1670 goto err_1;
1da177e4
LT		 1671 }
1672
2e4934aa
MK		 1673 id_lstatus_buf = kzalloc(sizeof(sense_log_drv_stat_t), GFP_KERNEL);
1674 if (!id_lstatus_buf) {
1da177e4 1675 printk( KERN_ERR "cpqarray: out of memory.\n");
2e4934aa 1676 goto err_2;
1da177e4
LT		 1677 }
1678
2e4934aa
MK		 1679 sense_config_buf = kzalloc(sizeof(config_t), GFP_KERNEL);
1680 if (!sense_config_buf) {
1da177e4 1681 printk( KERN_ERR "cpqarray: out of memory.\n");
2e4934aa 1682 goto err_3;
1da177e4
LT		 1683 }
1684
1da177e4
LT		 1685 info_p->phys_drives = 0;
1686 info_p->log_drv_map = 0;
1687 info_p->drv_assign_map = 0;
1688 info_p->drv_spare_map = 0;
1689 info_p->mp_failed_drv_map = 0; /* only initialized here */
1690 /* Get controllers info for this logical drive */
1691 ret_code = sendcmd(ID_CTLR, ctlr, id_ctlr_buf, 0, 0, 0, 0);
1692 if (ret_code == IO_ERROR) {
1693 /*
1694 * If can't get controller info, set the logical drive map to 0,
1695 * so the idastubopen will fail on all logical drives
1696 * on the controller.
1697 */
1da177e4 1698 printk(KERN_ERR "cpqarray: error sending ID controller\n");
2e4934aa 1699 goto err_4;
1da177e4
LT		 1700 }
1701
1702 info_p->log_drives = id_ctlr_buf->nr_drvs;
1703 for(i=0;i<4;i++)
1704 info_p->firm_rev[i] = id_ctlr_buf->firm_rev[i];
1705 info_p->ctlr_sig = id_ctlr_buf->cfg_sig;
1706
1707 printk(" (%s)\n", info_p->product_name);
1708 /*
1709 * Initialize logical drive map to zero
1710 */
1711 log_index = 0;
1712 /*
1713 * Get drive geometry for all logical drives
1714 */
1715 if (id_ctlr_buf->nr_drvs > 16)
1716 printk(KERN_WARNING "cpqarray ida%d: This driver supports "
1717 "16 logical drives per controller.\n. "
1718 " Additional drives will not be "
1719 "detected\n", ctlr);
1720
1721 for (log_unit = 0;
1722 (log_index < id_ctlr_buf->nr_drvs)
1723 && (log_unit < NWD);
1724 log_unit++) {
1da177e4
LT		 1725 size = sizeof(sense_log_drv_stat_t);
1726
1727 /*
1728 Send "Identify logical drive status" cmd
1729 */
1730 ret_code = sendcmd(SENSE_LOG_DRV_STAT,
1731 ctlr, id_lstatus_buf, size, 0, 0, log_unit);
1732 if (ret_code == IO_ERROR) {
1733 /*
1734 If can't get logical drive status, set
1735 the logical drive map to 0, so the
1736 idastubopen will fail for all logical drives
1737 on the controller.
1738 */
1739 info_p->log_drv_map = 0;
1740 printk( KERN_WARNING
1741 "cpqarray ida%d: idaGetGeometry - Controller"
1742 " failed to report status of logical drive %d\n"
1743 "Access to this controller has been disabled\n",
1744 ctlr, log_unit);
2e4934aa 1745 goto err_4;
1da177e4
LT		 1746 }
1747 /*
1748 Make sure the logical drive is configured
1749 */
1750 if (id_lstatus_buf->status != LOG_NOT_CONF) {
1751 ret_code = sendcmd(ID_LOG_DRV, ctlr, id_ldrive,
1752 sizeof(id_log_drv_t), 0, 0, log_unit);
1753 /*
1754 If error, the bit for this
1755 logical drive won't be set and
1756 idastubopen will return error.
1757 */
1758 if (ret_code != IO_ERROR) {
1759 drv = &info_p->drv[log_unit];
1760 drv->blk_size = id_ldrive->blk_size;
1761 drv->nr_blks = id_ldrive->nr_blks;
1762 drv->cylinders = id_ldrive->drv.cyl;
1763 drv->heads = id_ldrive->drv.heads;
1764 drv->sectors = id_ldrive->drv.sect_per_track;
1765 info_p->log_drv_map |= (1 << log_unit);
1766
1767 printk(KERN_INFO "cpqarray ida/c%dd%d: blksz=%d nr_blks=%d\n",
1768 ctlr, log_unit, drv->blk_size, drv->nr_blks);
1769 ret_code = sendcmd(SENSE_CONFIG,
1770 ctlr, sense_config_buf,
1771 sizeof(config_t), 0, 0, log_unit);
1772 if (ret_code == IO_ERROR) {
1773 info_p->log_drv_map = 0;
1da177e4 1774 printk(KERN_ERR "cpqarray: error sending sense config\n");
2e4934aa 1775 goto err_4;
1da177e4
LT		 1776 }
1777
1da177e4
LT		 1778 info_p->phys_drives =
1779 sense_config_buf->ctlr_phys_drv;
1780 info_p->drv_assign_map
1781 |= sense_config_buf->drv_asgn_map;
1782 info_p->drv_assign_map
1783 |= sense_config_buf->spare_asgn_map;
1784 info_p->drv_spare_map
1785 |= sense_config_buf->spare_asgn_map;
1786 } /* end of if no error on id_ldrive */
1787 log_index = log_index + 1;
1788 } /* end of if logical drive configured */
1789 } /* end of for log_unit */
2e4934aa
MK		 1790
1791 /* Free all the buffers and return */
1792err_4:
1da177e4 1793 kfree(sense_config_buf);
2e4934aa 1794err_3:
1da177e4 1795 kfree(id_lstatus_buf);
2e4934aa 1796err_2:
1da177e4 1797 kfree(id_ctlr_buf);
2e4934aa
MK		 1798err_1:
1799 kfree(id_ldrive);
1800err_0:
1da177e4 1801 return;
1da177e4
LT		 1802}
1803
1804static void __exit cpqarray_exit(void)
1805{
1806 int i;
1807
1808 pci_unregister_driver(&cpqarray_pci_driver);
1809
1810 /* Double check that all controller entries have been removed */
1811 for(i=0; i<MAX_CTLR; i++) {
1812 if (hba[i] != NULL) {
1813 printk(KERN_WARNING "cpqarray: Removing EISA "
1814 "controller %d\n", i);
1815 cpqarray_remove_one_eisa(i);
1816 }
1817 }
1818
1da177e4
LT		 1819 remove_proc_entry("cpqarray", proc_root_driver);
1820}
1821
1822module_init(cpqarray_init)
1823module_exit(cpqarray_exit)
Linux kernel - Deliverables
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