[BLOCK] Get rid of request_queue_t typedef
[linux-2.6.git] / drivers / block / cpqarray.c
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/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 */
51 MODULE_AUTHOR("Compaq Computer Corporation");
52 MODULE_DESCRIPTION("Driver for Compaq Smart2 Array Controllers version 2.6.0");
53 MODULE_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
68 static int nr_ctlr;
69 static ctlr_info_t *hba[MAX_CTLR];
70
71 static int eisa[8];
72
73 #define NR_PRODUCTS ARRAY_SIZE(products)
74
75 /*  board_id = Subsystem Device ID & Vendor ID
76  *  product = Marketing Name for the board
77  *  access = Address of the struct of function pointers
78  */
79 static 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 */
98 static 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
123 MODULE_DEVICE_TABLE(pci, cpqarray_pci_device_id);
124
125 static 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
136 static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev);
137 static void __iomem *remap_pci_mem(ulong base, ulong size);
138 static int cpqarray_eisa_detect(void);
139 static int pollcomplete(int ctlr);
140 static void getgeometry(int ctlr);
141 static void start_fwbk(int ctlr);
142
143 static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool);
144 static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool);
145
146 static void free_hba(int i);
147 static int alloc_cpqarray_hba(void);
148
149 static 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
158 static int ida_open(struct inode *inode, struct file *filep);
159 static int ida_release(struct inode *inode, struct file *filep);
160 static int ida_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, unsigned long arg);
161 static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo);
162 static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io);
163
164 static void do_ida_request(struct request_queue *q);
165 static void start_io(ctlr_info_t *h);
166
167 static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
168 static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c);
169 static inline void complete_buffers(struct bio *bio, int ok);
170 static inline void complete_command(cmdlist_t *cmd, int timeout);
171
172 static irqreturn_t do_ida_intr(int irq, void *dev_id);
173 static void ida_timer(unsigned long tdata);
174 static int ida_revalidate(struct gendisk *disk);
175 static int revalidate_allvol(ctlr_info_t *host);
176 static int cpqarray_register_ctlr(int ctlr, struct pci_dev *pdev);
177
178 #ifdef CONFIG_PROC_FS
179 static void ida_procinit(int i);
180 static int ida_proc_get_info(char *buffer, char **start, off_t offset, int length, int *eof, void *data);
181 #else
182 static void ida_procinit(int i) {}
183 #endif
184
185 static inline drv_info_t *get_drv(struct gendisk *disk)
186 {
187         return disk->private_data;
188 }
189
190 static inline ctlr_info_t *get_host(struct gendisk *disk)
191 {
192         return disk->queue->queuedata;
193 }
194
195
196 static struct block_device_operations ida_fops  = {
197         .owner          = THIS_MODULE,
198         .open           = ida_open,
199         .release        = ida_release,
200         .ioctl          = ida_ioctl,
201         .getgeo         = ida_getgeo,
202         .revalidate_disk= ida_revalidate,
203 };
204
205
206 #ifdef CONFIG_PROC_FS
207
208 static 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  */
214 static 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  */
228 static 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
312 module_param_array(eisa, int, NULL, 0);
313
314 static 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
324 static 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]);
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
356 static 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  */
381 static 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 */
392 static int __init cpqarray_register_ctlr( int i, struct pci_dev *pdev)
393 {
394         struct request_queue *q;
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,
410                 IRQF_DISABLED|IRQF_SHARED, hba[i]->devname, hba[i]))
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
423         hba[i]->cmd_pool = (cmdlist_t *)pci_alloc_consistent(
424                 hba[i]->pci_dev, NR_CMDS * sizeof(cmdlist_t),
425                 &(hba[i]->cmd_pool_dhandle));
426         hba[i]->cmd_pool_bits = kmalloc(
427                 ((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long),
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));
434         memset(hba[i]->cmd_pool_bits, 0, ((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long));
435         printk(KERN_INFO "cpqarray: Finding drives on %s",
436                 hba[i]->devname);
437
438         spin_lock_init(&hba[i]->lock);
439         q = blk_init_queue(do_ida_request, &hba[i]->lock);
440         if (!q)
441                 goto Enomem1;
442
443         hba[i]->queue = q;
444         q->queuedata = hba[i];
445
446         getgeometry(i);
447         start_fwbk(i);
448
449         ida_procinit(i);
450
451         if (pdev)
452                 blk_queue_bounce_limit(q, hba[i]->pci_dev->dma_mask);
453
454         /* This is a hardware imposed limit. */
455         blk_queue_max_hw_segments(q, SG_MAX);
456
457         /* This is a driver limit and could be eliminated. */
458         blk_queue_max_phys_segments(q, SG_MAX);
459         
460         init_timer(&hba[i]->timer);
461         hba[i]->timer.expires = jiffies + IDA_TIMER;
462         hba[i]->timer.data = (unsigned long)hba[i];
463         hba[i]->timer.function = ida_timer;
464         add_timer(&hba[i]->timer);
465
466         /* Enable IRQ now that spinlock and rate limit timer are set up */
467         hba[i]->access.set_intr_mask(hba[i], FIFO_NOT_EMPTY);
468
469         for(j=0; j<NWD; j++) {
470                 struct gendisk *disk = ida_gendisk[i][j];
471                 drv_info_t *drv = &hba[i]->drv[j];
472                 sprintf(disk->disk_name, "ida/c%dd%d", i, j);
473                 disk->major = COMPAQ_SMART2_MAJOR + i;
474                 disk->first_minor = j<<NWD_SHIFT;
475                 disk->fops = &ida_fops;
476                 if (j && !drv->nr_blks)
477                         continue;
478                 blk_queue_hardsect_size(hba[i]->queue, drv->blk_size);
479                 set_capacity(disk, drv->nr_blks);
480                 disk->queue = hba[i]->queue;
481                 disk->private_data = drv;
482                 add_disk(disk);
483         }
484
485         /* done ! */
486         return(i);
487
488 Enomem1:
489         nr_ctlr = i; 
490         kfree(hba[i]->cmd_pool_bits);
491         if (hba[i]->cmd_pool)
492                 pci_free_consistent(hba[i]->pci_dev, NR_CMDS*sizeof(cmdlist_t), 
493                                     hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
494 Enomem2:
495         while (j--) {
496                 put_disk(ida_gendisk[i][j]);
497                 ida_gendisk[i][j] = NULL;
498         }
499         free_irq(hba[i]->intr, hba[i]);
500 Enomem3:
501         unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
502 Enomem4:
503         if (pdev)
504                 pci_set_drvdata(pdev, NULL);
505         release_io_mem(hba[i]);
506         free_hba(i);
507
508         printk( KERN_ERR "cpqarray: out of memory");
509
510         return -1;
511 }
512
513 static int __init cpqarray_init_one( struct pci_dev *pdev,
514         const struct pci_device_id *ent)
515 {
516         int i;
517
518         printk(KERN_DEBUG "cpqarray: Device 0x%x has been found at"
519                         " bus %d dev %d func %d\n",
520                         pdev->device, pdev->bus->number, PCI_SLOT(pdev->devfn),
521                         PCI_FUNC(pdev->devfn));
522         i = alloc_cpqarray_hba();
523         if( i < 0 )
524                 return (-1);
525         memset(hba[i], 0, sizeof(ctlr_info_t));
526         sprintf(hba[i]->devname, "ida%d", i);
527         hba[i]->ctlr = i;
528         /* Initialize the pdev driver private data */
529         pci_set_drvdata(pdev, hba[i]);
530
531         if (cpqarray_pci_init(hba[i], pdev) != 0) {
532                 pci_set_drvdata(pdev, NULL);
533                 release_io_mem(hba[i]);
534                 free_hba(i);
535                 return -1;
536         }
537
538         return (cpqarray_register_ctlr(i, pdev));
539 }
540
541 static struct pci_driver cpqarray_pci_driver = {
542         .name = "cpqarray",
543         .probe = cpqarray_init_one,
544         .remove = __devexit_p(cpqarray_remove_one_pci),
545         .id_table = cpqarray_pci_device_id,
546 };
547
548 /*
549  *  This is it.  Find all the controllers and register them.
550  *  returns the number of block devices registered.
551  */
552 static int __init cpqarray_init(void)
553 {
554         int num_cntlrs_reg = 0;
555         int i;
556         int rc = 0;
557
558         /* detect controllers */
559         printk(DRIVER_NAME "\n");
560
561         rc = pci_register_driver(&cpqarray_pci_driver);
562         if (rc)
563                 return rc;
564         cpqarray_eisa_detect();
565         
566         for (i=0; i < MAX_CTLR; i++) {
567                 if (hba[i] != NULL)
568                         num_cntlrs_reg++;
569         }
570
571         return(num_cntlrs_reg);
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         if (pci_enable_device(pdev)) {
617                 printk(KERN_ERR "cpqarray: Unable to Enable PCI device\n");
618                 return -1;
619         }
620         vendor_id = pdev->vendor;
621         device_id = pdev->device;
622         irq = pdev->irq;
623
624         for(i=0; i<6; i++)
625                 addr[i] = pci_resource_start(pdev, i);
626
627         if (pci_set_dma_mask(pdev, CPQARRAY_DMA_MASK) != 0)
628         {
629                 printk(KERN_ERR "cpqarray: Unable to set DMA mask\n");
630                 return -1;
631         }
632
633         pci_read_config_word(pdev, PCI_COMMAND, &command);
634         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
635         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
636         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_timer);
637
638         pci_read_config_dword(pdev, 0x2c, &board_id);
639
640         /* check to see if controller has been disabled */
641         if(!(command & 0x02)) {
642                 printk(KERN_WARNING
643                         "cpqarray: controller appears to be disabled\n");
644                 return(-1);
645         }
646
647 DBGINFO(
648         printk("vendor_id = %x\n", vendor_id);
649         printk("device_id = %x\n", device_id);
650         printk("command = %x\n", command);
651         for(i=0; i<6; i++)
652                 printk("addr[%d] = %lx\n", i, addr[i]);
653         printk("revision = %x\n", revision);
654         printk("irq = %x\n", irq);
655         printk("cache_line_size = %x\n", cache_line_size);
656         printk("latency_timer = %x\n", latency_timer);
657         printk("board_id = %x\n", board_id);
658 );
659
660         c->intr = irq;
661
662         for(i=0; i<6; i++) {
663                 if (pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO)
664                 { /* IO space */
665                         c->io_mem_addr = addr[i];
666                         c->io_mem_length = pci_resource_end(pdev, i)
667                                 - pci_resource_start(pdev, i) + 1;
668                         if(!request_region( c->io_mem_addr, c->io_mem_length,
669                                 "cpqarray"))
670                         {
671                                 printk( KERN_WARNING "cpqarray I/O memory range already in use addr %lx length = %ld\n", c->io_mem_addr, c->io_mem_length);
672                                 c->io_mem_addr = 0;
673                                 c->io_mem_length = 0;
674                         }
675                         break;
676                 }
677         }
678
679         c->paddr = 0;
680         for(i=0; i<6; i++)
681                 if (!(pci_resource_flags(pdev, i) &
682                                 PCI_BASE_ADDRESS_SPACE_IO)) {
683                         c->paddr = pci_resource_start (pdev, i);
684                         break;
685                 }
686         if (!c->paddr)
687                 return -1;
688         c->vaddr = remap_pci_mem(c->paddr, 128);
689         if (!c->vaddr)
690                 return -1;
691         c->board_id = board_id;
692
693         for(i=0; i<NR_PRODUCTS; i++) {
694                 if (board_id == products[i].board_id) {
695                         c->product_name = products[i].product_name;
696                         c->access = *(products[i].access);
697                         break;
698                 }
699         }
700         if (i == NR_PRODUCTS) {
701                 printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
702                         " to access the SMART Array controller %08lx\n", 
703                                 (unsigned long)board_id);
704                 return -1;
705         }
706
707         return 0;
708 }
709
710 /*
711  * Map (physical) PCI mem into (virtual) kernel space
712  */
713 static void __iomem *remap_pci_mem(ulong base, ulong size)
714 {
715         ulong page_base        = ((ulong) base) & PAGE_MASK;
716         ulong page_offs        = ((ulong) base) - page_base;
717         void __iomem *page_remapped    = ioremap(page_base, page_offs+size);
718
719         return (page_remapped ? (page_remapped + page_offs) : NULL);
720 }
721
722 #ifndef MODULE
723 /*
724  * Config string is a comma separated set of i/o addresses of EISA cards.
725  */
726 static int cpqarray_setup(char *str)
727 {
728         int i, ints[9];
729
730         (void)get_options(str, ARRAY_SIZE(ints), ints);
731
732         for(i=0; i<ints[0] && i<8; i++)
733                 eisa[i] = ints[i+1];
734         return 1;
735 }
736
737 __setup("smart2=", cpqarray_setup);
738
739 #endif
740
741 /*
742  * Find an EISA controller's signature.  Set up an hba if we find it.
743  */
744 static int __init cpqarray_eisa_detect(void)
745 {
746         int i=0, j;
747         __u32 board_id;
748         int intr;
749         int ctlr;
750         int num_ctlr = 0;
751
752         while(i<8 && eisa[i]) {
753                 ctlr = alloc_cpqarray_hba();
754                 if(ctlr == -1)
755                         break;
756                 board_id = inl(eisa[i]+0xC80);
757                 for(j=0; j < NR_PRODUCTS; j++)
758                         if (board_id == products[j].board_id) 
759                                 break;
760
761                 if (j == NR_PRODUCTS) {
762                         printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
763                                 " to access the SMART Array controller %08lx\n",                                 (unsigned long)board_id);
764                         continue;
765                 }
766
767                 memset(hba[ctlr], 0, sizeof(ctlr_info_t));
768                 hba[ctlr]->io_mem_addr = eisa[i];
769                 hba[ctlr]->io_mem_length = 0x7FF;
770                 if(!request_region(hba[ctlr]->io_mem_addr,
771                                 hba[ctlr]->io_mem_length,
772                                 "cpqarray"))
773                 {
774                         printk(KERN_WARNING "cpqarray: I/O range already in "
775                                         "use addr = %lx length = %ld\n",
776                                         hba[ctlr]->io_mem_addr,
777                                         hba[ctlr]->io_mem_length);
778                         free_hba(ctlr);
779                         continue;
780                 }
781
782                 /*
783                  * Read the config register to find our interrupt
784                  */
785                 intr = inb(eisa[i]+0xCC0) >> 4;
786                 if (intr & 1) intr = 11;
787                 else if (intr & 2) intr = 10;
788                 else if (intr & 4) intr = 14;
789                 else if (intr & 8) intr = 15;
790                 
791                 hba[ctlr]->intr = intr;
792                 sprintf(hba[ctlr]->devname, "ida%d", nr_ctlr);
793                 hba[ctlr]->product_name = products[j].product_name;
794                 hba[ctlr]->access = *(products[j].access);
795                 hba[ctlr]->ctlr = ctlr;
796                 hba[ctlr]->board_id = board_id;
797                 hba[ctlr]->pci_dev = NULL; /* not PCI */
798
799 DBGINFO(
800         printk("i = %d, j = %d\n", i, j);
801         printk("irq = %x\n", intr);
802         printk("product name = %s\n", products[j].product_name);
803         printk("board_id = %x\n", board_id);
804 );
805
806                 num_ctlr++;
807                 i++;
808
809                 if (cpqarray_register_ctlr(ctlr, NULL) == -1)
810                         printk(KERN_WARNING
811                                 "cpqarray: Can't register EISA controller %d\n",
812                                 ctlr);
813
814         }
815
816         return num_ctlr;
817 }
818
819 /*
820  * Open.  Make sure the device is really there.
821  */
822 static int ida_open(struct inode *inode, struct file *filep)
823 {
824         drv_info_t *drv = get_drv(inode->i_bdev->bd_disk);
825         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
826
827         DBGINFO(printk("ida_open %s\n", inode->i_bdev->bd_disk->disk_name));
828         /*
829          * Root is allowed to open raw volume zero even if it's not configured
830          * so array config can still work.  I don't think I really like this,
831          * but I'm already using way to many device nodes to claim another one
832          * for "raw controller".
833          */
834         if (!drv->nr_blks) {
835                 if (!capable(CAP_SYS_RAWIO))
836                         return -ENXIO;
837                 if (!capable(CAP_SYS_ADMIN) && drv != host->drv)
838                         return -ENXIO;
839         }
840         host->usage_count++;
841         return 0;
842 }
843
844 /*
845  * Close.  Sync first.
846  */
847 static int ida_release(struct inode *inode, struct file *filep)
848 {
849         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
850         host->usage_count--;
851         return 0;
852 }
853
854 /*
855  * Enqueuing and dequeuing functions for cmdlists.
856  */
857 static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c)
858 {
859         if (*Qptr == NULL) {
860                 *Qptr = c;
861                 c->next = c->prev = c;
862         } else {
863                 c->prev = (*Qptr)->prev;
864                 c->next = (*Qptr);
865                 (*Qptr)->prev->next = c;
866                 (*Qptr)->prev = c;
867         }
868 }
869
870 static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c)
871 {
872         if (c && c->next != c) {
873                 if (*Qptr == c) *Qptr = c->next;
874                 c->prev->next = c->next;
875                 c->next->prev = c->prev;
876         } else {
877                 *Qptr = NULL;
878         }
879         return c;
880 }
881
882 /*
883  * Get a request and submit it to the controller.
884  * This routine needs to grab all the requests it possibly can from the
885  * req Q and submit them.  Interrupts are off (and need to be off) when you
886  * are in here (either via the dummy do_ida_request functions or by being
887  * called from the interrupt handler
888  */
889 static void do_ida_request(struct request_queue *q)
890 {
891         ctlr_info_t *h = q->queuedata;
892         cmdlist_t *c;
893         struct request *creq;
894         struct scatterlist tmp_sg[SG_MAX];
895         int i, dir, seg;
896
897         if (blk_queue_plugged(q))
898                 goto startio;
899
900 queue_next:
901         creq = elv_next_request(q);
902         if (!creq)
903                 goto startio;
904
905         BUG_ON(creq->nr_phys_segments > SG_MAX);
906
907         if ((c = cmd_alloc(h,1)) == NULL)
908                 goto startio;
909
910         blkdev_dequeue_request(creq);
911
912         c->ctlr = h->ctlr;
913         c->hdr.unit = (drv_info_t *)(creq->rq_disk->private_data) - h->drv;
914         c->hdr.size = sizeof(rblk_t) >> 2;
915         c->size += sizeof(rblk_t);
916
917         c->req.hdr.blk = creq->sector;
918         c->rq = creq;
919 DBGPX(
920         printk("sector=%d, nr_sectors=%d\n", creq->sector, creq->nr_sectors);
921 );
922         seg = blk_rq_map_sg(q, creq, tmp_sg);
923
924         /* Now do all the DMA Mappings */
925         if (rq_data_dir(creq) == READ)
926                 dir = PCI_DMA_FROMDEVICE;
927         else
928                 dir = PCI_DMA_TODEVICE;
929         for( i=0; i < seg; i++)
930         {
931                 c->req.sg[i].size = tmp_sg[i].length;
932                 c->req.sg[i].addr = (__u32) pci_map_page(h->pci_dev,
933                                                  tmp_sg[i].page,
934                                                  tmp_sg[i].offset,
935                                                  tmp_sg[i].length, dir);
936         }
937 DBGPX(  printk("Submitting %d sectors in %d segments\n", creq->nr_sectors, seg); );
938         c->req.hdr.sg_cnt = seg;
939         c->req.hdr.blk_cnt = creq->nr_sectors;
940         c->req.hdr.cmd = (rq_data_dir(creq) == READ) ? IDA_READ : IDA_WRITE;
941         c->type = CMD_RWREQ;
942
943         /* Put the request on the tail of the request queue */
944         addQ(&h->reqQ, c);
945         h->Qdepth++;
946         if (h->Qdepth > h->maxQsinceinit) 
947                 h->maxQsinceinit = h->Qdepth;
948
949         goto queue_next;
950
951 startio:
952         start_io(h);
953 }
954
955 /* 
956  * start_io submits everything on a controller's request queue
957  * and moves it to the completion queue.
958  *
959  * Interrupts had better be off if you're in here
960  */
961 static void start_io(ctlr_info_t *h)
962 {
963         cmdlist_t *c;
964
965         while((c = h->reqQ) != NULL) {
966                 /* Can't do anything if we're busy */
967                 if (h->access.fifo_full(h) == 0)
968                         return;
969
970                 /* Get the first entry from the request Q */
971                 removeQ(&h->reqQ, c);
972                 h->Qdepth--;
973         
974                 /* Tell the controller to do our bidding */
975                 h->access.submit_command(h, c);
976
977                 /* Get onto the completion Q */
978                 addQ(&h->cmpQ, c);
979         }
980 }
981
982 static inline void complete_buffers(struct bio *bio, int ok)
983 {
984         struct bio *xbh;
985         while(bio) {
986                 int nr_sectors = bio_sectors(bio);
987
988                 xbh = bio->bi_next;
989                 bio->bi_next = NULL;
990                 
991                 bio_endio(bio, nr_sectors << 9, ok ? 0 : -EIO);
992
993                 bio = xbh;
994         }
995 }
996 /*
997  * Mark all buffers that cmd was responsible for
998  */
999 static inline void complete_command(cmdlist_t *cmd, int timeout)
1000 {
1001         struct request *rq = cmd->rq;
1002         int ok=1;
1003         int i, ddir;
1004
1005         if (cmd->req.hdr.rcode & RCODE_NONFATAL &&
1006            (hba[cmd->ctlr]->misc_tflags & MISC_NONFATAL_WARN) == 0) {
1007                 printk(KERN_NOTICE "Non Fatal error on ida/c%dd%d\n",
1008                                 cmd->ctlr, cmd->hdr.unit);
1009                 hba[cmd->ctlr]->misc_tflags |= MISC_NONFATAL_WARN;
1010         }
1011         if (cmd->req.hdr.rcode & RCODE_FATAL) {
1012                 printk(KERN_WARNING "Fatal error on ida/c%dd%d\n",
1013                                 cmd->ctlr, cmd->hdr.unit);
1014                 ok = 0;
1015         }
1016         if (cmd->req.hdr.rcode & RCODE_INVREQ) {
1017                                 printk(KERN_WARNING "Invalid request on ida/c%dd%d = (cmd=%x sect=%d cnt=%d sg=%d ret=%x)\n",
1018                                 cmd->ctlr, cmd->hdr.unit, cmd->req.hdr.cmd,
1019                                 cmd->req.hdr.blk, cmd->req.hdr.blk_cnt,
1020                                 cmd->req.hdr.sg_cnt, cmd->req.hdr.rcode);
1021                 ok = 0; 
1022         }
1023         if (timeout) ok = 0;
1024         /* unmap the DMA mapping for all the scatter gather elements */
1025         if (cmd->req.hdr.cmd == IDA_READ)
1026                 ddir = PCI_DMA_FROMDEVICE;
1027         else
1028                 ddir = PCI_DMA_TODEVICE;
1029         for(i=0; i<cmd->req.hdr.sg_cnt; i++)
1030                 pci_unmap_page(hba[cmd->ctlr]->pci_dev, cmd->req.sg[i].addr,
1031                                 cmd->req.sg[i].size, ddir);
1032
1033         complete_buffers(rq->bio, ok);
1034
1035         if (blk_fs_request(rq)) {
1036                 const int rw = rq_data_dir(rq);
1037
1038                 disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
1039         }
1040
1041         add_disk_randomness(rq->rq_disk);
1042
1043         DBGPX(printk("Done with %p\n", rq););
1044         end_that_request_last(rq, ok ? 1 : -EIO);
1045 }
1046
1047 /*
1048  *  The controller will interrupt us upon completion of commands.
1049  *  Find the command on the completion queue, remove it, tell the OS and
1050  *  try to queue up more IO
1051  */
1052 static irqreturn_t do_ida_intr(int irq, void *dev_id)
1053 {
1054         ctlr_info_t *h = dev_id;
1055         cmdlist_t *c;
1056         unsigned long istat;
1057         unsigned long flags;
1058         __u32 a,a1;
1059
1060         istat = h->access.intr_pending(h);
1061         /* Is this interrupt for us? */
1062         if (istat == 0)
1063                 return IRQ_NONE;
1064
1065         /*
1066          * If there are completed commands in the completion queue,
1067          * we had better do something about it.
1068          */
1069         spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
1070         if (istat & FIFO_NOT_EMPTY) {
1071                 while((a = h->access.command_completed(h))) {
1072                         a1 = a; a &= ~3;
1073                         if ((c = h->cmpQ) == NULL)
1074                         {  
1075                                 printk(KERN_WARNING "cpqarray: Completion of %08lx ignored\n", (unsigned long)a1);
1076                                 continue;       
1077                         } 
1078                         while(c->busaddr != a) {
1079                                 c = c->next;
1080                                 if (c == h->cmpQ) 
1081                                         break;
1082                         }
1083                         /*
1084                          * If we've found the command, take it off the
1085                          * completion Q and free it
1086                          */
1087                         if (c->busaddr == a) {
1088                                 removeQ(&h->cmpQ, c);
1089                                 /*  Check for invalid command.
1090                                  *  Controller returns command error,
1091                                  *  But rcode = 0.
1092                                  */
1093
1094                                 if((a1 & 0x03) && (c->req.hdr.rcode == 0))
1095                                 {
1096                                         c->req.hdr.rcode = RCODE_INVREQ;
1097                                 }
1098                                 if (c->type == CMD_RWREQ) {
1099                                         complete_command(c, 0);
1100                                         cmd_free(h, c, 1);
1101                                 } else if (c->type == CMD_IOCTL_PEND) {
1102                                         c->type = CMD_IOCTL_DONE;
1103                                 }
1104                                 continue;
1105                         }
1106                 }
1107         }
1108
1109         /*
1110          * See if we can queue up some more IO
1111          */
1112         do_ida_request(h->queue);
1113         spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags); 
1114         return IRQ_HANDLED;
1115 }
1116
1117 /*
1118  * This timer was for timing out requests that haven't happened after
1119  * IDA_TIMEOUT.  That wasn't such a good idea.  This timer is used to
1120  * reset a flags structure so we don't flood the user with
1121  * "Non-Fatal error" messages.
1122  */
1123 static void ida_timer(unsigned long tdata)
1124 {
1125         ctlr_info_t *h = (ctlr_info_t*)tdata;
1126
1127         h->timer.expires = jiffies + IDA_TIMER;
1128         add_timer(&h->timer);
1129         h->misc_tflags = 0;
1130 }
1131
1132 static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1133 {
1134         drv_info_t *drv = get_drv(bdev->bd_disk);
1135
1136         if (drv->cylinders) {
1137                 geo->heads = drv->heads;
1138                 geo->sectors = drv->sectors;
1139                 geo->cylinders = drv->cylinders;
1140         } else {
1141                 geo->heads = 0xff;
1142                 geo->sectors = 0x3f;
1143                 geo->cylinders = drv->nr_blks / (0xff*0x3f);
1144         }
1145
1146         return 0;
1147 }
1148
1149 /*
1150  *  ida_ioctl does some miscellaneous stuff like reporting drive geometry,
1151  *  setting readahead and submitting commands from userspace to the controller.
1152  */
1153 static int ida_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, unsigned long arg)
1154 {
1155         drv_info_t *drv = get_drv(inode->i_bdev->bd_disk);
1156         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
1157         int error;
1158         ida_ioctl_t __user *io = (ida_ioctl_t __user *)arg;
1159         ida_ioctl_t *my_io;
1160
1161         switch(cmd) {
1162         case IDAGETDRVINFO:
1163                 if (copy_to_user(&io->c.drv, drv, sizeof(drv_info_t)))
1164                         return -EFAULT;
1165                 return 0;
1166         case IDAPASSTHRU:
1167                 if (!capable(CAP_SYS_RAWIO))
1168                         return -EPERM;
1169                 my_io = kmalloc(sizeof(ida_ioctl_t), GFP_KERNEL);
1170                 if (!my_io)
1171                         return -ENOMEM;
1172                 error = -EFAULT;
1173                 if (copy_from_user(my_io, io, sizeof(*my_io)))
1174                         goto out_passthru;
1175                 error = ida_ctlr_ioctl(host, drv - host->drv, my_io);
1176                 if (error)
1177                         goto out_passthru;
1178                 error = -EFAULT;
1179                 if (copy_to_user(io, my_io, sizeof(*my_io)))
1180                         goto out_passthru;
1181                 error = 0;
1182 out_passthru:
1183                 kfree(my_io);
1184                 return error;
1185         case IDAGETCTLRSIG:
1186                 if (!arg) return -EINVAL;
1187                 put_user(host->ctlr_sig, (int __user *)arg);
1188                 return 0;
1189         case IDAREVALIDATEVOLS:
1190                 if (iminor(inode) != 0)
1191                         return -ENXIO;
1192                 return revalidate_allvol(host);
1193         case IDADRIVERVERSION:
1194                 if (!arg) return -EINVAL;
1195                 put_user(DRIVER_VERSION, (unsigned long __user *)arg);
1196                 return 0;
1197         case IDAGETPCIINFO:
1198         {
1199                 
1200                 ida_pci_info_struct pciinfo;
1201
1202                 if (!arg) return -EINVAL;
1203                 pciinfo.bus = host->pci_dev->bus->number;
1204                 pciinfo.dev_fn = host->pci_dev->devfn;
1205                 pciinfo.board_id = host->board_id;
1206                 if(copy_to_user((void __user *) arg, &pciinfo,  
1207                         sizeof( ida_pci_info_struct)))
1208                                 return -EFAULT;
1209                 return(0);
1210         }       
1211
1212         default:
1213                 return -EINVAL;
1214         }
1215                 
1216 }
1217 /*
1218  * ida_ctlr_ioctl is for passing commands to the controller from userspace.
1219  * The command block (io) has already been copied to kernel space for us,
1220  * however, any elements in the sglist need to be copied to kernel space
1221  * or copied back to userspace.
1222  *
1223  * Only root may perform a controller passthru command, however I'm not doing
1224  * any serious sanity checking on the arguments.  Doing an IDA_WRITE_MEDIA and
1225  * putting a 64M buffer in the sglist is probably a *bad* idea.
1226  */
1227 static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
1228 {
1229         int ctlr = h->ctlr;
1230         cmdlist_t *c;
1231         void *p = NULL;
1232         unsigned long flags;
1233         int error;
1234
1235         if ((c = cmd_alloc(h, 0)) == NULL)
1236                 return -ENOMEM;
1237         c->ctlr = ctlr;
1238         c->hdr.unit = (io->unit & UNITVALID) ? (io->unit & ~UNITVALID) : dsk;
1239         c->hdr.size = sizeof(rblk_t) >> 2;
1240         c->size += sizeof(rblk_t);
1241
1242         c->req.hdr.cmd = io->cmd;
1243         c->req.hdr.blk = io->blk;
1244         c->req.hdr.blk_cnt = io->blk_cnt;
1245         c->type = CMD_IOCTL_PEND;
1246
1247         /* Pre submit processing */
1248         switch(io->cmd) {
1249         case PASSTHRU_A:
1250                 p = kmalloc(io->sg[0].size, GFP_KERNEL);
1251                 if (!p) 
1252                 { 
1253                         error = -ENOMEM; 
1254                         cmd_free(h, c, 0); 
1255                         return(error);
1256                 }
1257                 if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
1258                         kfree(p);
1259                         cmd_free(h, c, 0); 
1260                         return -EFAULT;
1261                 }
1262                 c->req.hdr.blk = pci_map_single(h->pci_dev, &(io->c), 
1263                                 sizeof(ida_ioctl_t), 
1264                                 PCI_DMA_BIDIRECTIONAL);
1265                 c->req.sg[0].size = io->sg[0].size;
1266                 c->req.sg[0].addr = pci_map_single(h->pci_dev, p, 
1267                         c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1268                 c->req.hdr.sg_cnt = 1;
1269                 break;
1270         case IDA_READ:
1271         case READ_FLASH_ROM:
1272         case SENSE_CONTROLLER_PERFORMANCE:
1273                 p = kmalloc(io->sg[0].size, GFP_KERNEL);
1274                 if (!p) 
1275                 { 
1276                         error = -ENOMEM; 
1277                         cmd_free(h, c, 0);
1278                         return(error);
1279                 }
1280
1281                 c->req.sg[0].size = io->sg[0].size;
1282                 c->req.sg[0].addr = pci_map_single(h->pci_dev, p, 
1283                         c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL); 
1284                 c->req.hdr.sg_cnt = 1;
1285                 break;
1286         case IDA_WRITE:
1287         case IDA_WRITE_MEDIA:
1288         case DIAG_PASS_THRU:
1289         case COLLECT_BUFFER:
1290         case WRITE_FLASH_ROM:
1291                 p = kmalloc(io->sg[0].size, GFP_KERNEL);
1292                 if (!p) 
1293                 { 
1294                         error = -ENOMEM; 
1295                         cmd_free(h, c, 0);
1296                         return(error);
1297                 }
1298                 if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
1299                         kfree(p);
1300                         cmd_free(h, c, 0);
1301                         return -EFAULT;
1302                 }
1303                 c->req.sg[0].size = io->sg[0].size;
1304                 c->req.sg[0].addr = pci_map_single(h->pci_dev, p, 
1305                         c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL); 
1306                 c->req.hdr.sg_cnt = 1;
1307                 break;
1308         default:
1309                 c->req.sg[0].size = sizeof(io->c);
1310                 c->req.sg[0].addr = pci_map_single(h->pci_dev,&io->c, 
1311                         c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1312                 c->req.hdr.sg_cnt = 1;
1313         }
1314         
1315         /* Put the request on the tail of the request queue */
1316         spin_lock_irqsave(IDA_LOCK(ctlr), flags);
1317         addQ(&h->reqQ, c);
1318         h->Qdepth++;
1319         start_io(h);
1320         spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1321
1322         /* Wait for completion */
1323         while(c->type != CMD_IOCTL_DONE)
1324                 schedule();
1325
1326         /* Unmap the DMA  */
1327         pci_unmap_single(h->pci_dev, c->req.sg[0].addr, c->req.sg[0].size, 
1328                 PCI_DMA_BIDIRECTIONAL);
1329         /* Post submit processing */
1330         switch(io->cmd) {
1331         case PASSTHRU_A:
1332                 pci_unmap_single(h->pci_dev, c->req.hdr.blk,
1333                                 sizeof(ida_ioctl_t),
1334                                 PCI_DMA_BIDIRECTIONAL);
1335         case IDA_READ:
1336         case DIAG_PASS_THRU:
1337         case SENSE_CONTROLLER_PERFORMANCE:
1338         case READ_FLASH_ROM:
1339                 if (copy_to_user(io->sg[0].addr, p, io->sg[0].size)) {
1340                         kfree(p);
1341                         return -EFAULT;
1342                 }
1343                 /* fall through and free p */
1344         case IDA_WRITE:
1345         case IDA_WRITE_MEDIA:
1346         case COLLECT_BUFFER:
1347         case WRITE_FLASH_ROM:
1348                 kfree(p);
1349                 break;
1350         default:;
1351                 /* Nothing to do */
1352         }
1353
1354         io->rcode = c->req.hdr.rcode;
1355         cmd_free(h, c, 0);
1356         return(0);
1357 }
1358
1359 /*
1360  * Commands are pre-allocated in a large block.  Here we use a simple bitmap
1361  * scheme to suballocte them to the driver.  Operations that are not time
1362  * critical (and can wait for kmalloc and possibly sleep) can pass in NULL
1363  * as the first argument to get a new command.
1364  */
1365 static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool)
1366 {
1367         cmdlist_t * c;
1368         int i;
1369         dma_addr_t cmd_dhandle;
1370
1371         if (!get_from_pool) {
1372                 c = (cmdlist_t*)pci_alloc_consistent(h->pci_dev, 
1373                         sizeof(cmdlist_t), &cmd_dhandle);
1374                 if(c==NULL)
1375                         return NULL;
1376         } else {
1377                 do {
1378                         i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
1379                         if (i == NR_CMDS)
1380                                 return NULL;
1381                 } while(test_and_set_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG)) != 0);
1382                 c = h->cmd_pool + i;
1383                 cmd_dhandle = h->cmd_pool_dhandle + i*sizeof(cmdlist_t);
1384                 h->nr_allocs++;
1385         }
1386
1387         memset(c, 0, sizeof(cmdlist_t));
1388         c->busaddr = cmd_dhandle; 
1389         return c;
1390 }
1391
1392 static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool)
1393 {
1394         int i;
1395
1396         if (!got_from_pool) {
1397                 pci_free_consistent(h->pci_dev, sizeof(cmdlist_t), c,
1398                         c->busaddr);
1399         } else {
1400                 i = c - h->cmd_pool;
1401                 clear_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG));
1402                 h->nr_frees++;
1403         }
1404 }
1405
1406 /***********************************************************************
1407     name:        sendcmd
1408     Send a command to an IDA using the memory mapped FIFO interface
1409     and wait for it to complete.  
1410     This routine should only be called at init time.
1411 ***********************************************************************/
1412 static int sendcmd(
1413         __u8    cmd,
1414         int     ctlr,
1415         void    *buff,
1416         size_t  size,
1417         unsigned int blk,
1418         unsigned int blkcnt,
1419         unsigned int log_unit )
1420 {
1421         cmdlist_t *c;
1422         int complete;
1423         unsigned long temp;
1424         unsigned long i;
1425         ctlr_info_t *info_p = hba[ctlr];
1426
1427         c = cmd_alloc(info_p, 1);
1428         if(!c)
1429                 return IO_ERROR;
1430         c->ctlr = ctlr;
1431         c->hdr.unit = log_unit;
1432         c->hdr.prio = 0;
1433         c->hdr.size = sizeof(rblk_t) >> 2;
1434         c->size += sizeof(rblk_t);
1435
1436         /* The request information. */
1437         c->req.hdr.next = 0;
1438         c->req.hdr.rcode = 0;
1439         c->req.bp = 0;
1440         c->req.hdr.sg_cnt = 1;
1441         c->req.hdr.reserved = 0;
1442         
1443         if (size == 0)
1444                 c->req.sg[0].size = 512;
1445         else
1446                 c->req.sg[0].size = size;
1447
1448         c->req.hdr.blk = blk;
1449         c->req.hdr.blk_cnt = blkcnt;
1450         c->req.hdr.cmd = (unsigned char) cmd;
1451         c->req.sg[0].addr = (__u32) pci_map_single(info_p->pci_dev, 
1452                 buff, c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1453         /*
1454          * Disable interrupt
1455          */
1456         info_p->access.set_intr_mask(info_p, 0);
1457         /* Make sure there is room in the command FIFO */
1458         /* Actually it should be completely empty at this time. */
1459         for (i = 200000; i > 0; i--) {
1460                 temp = info_p->access.fifo_full(info_p);
1461                 if (temp != 0) {
1462                         break;
1463                 }
1464                 udelay(10);
1465 DBG(
1466                 printk(KERN_WARNING "cpqarray ida%d: idaSendPciCmd FIFO full,"
1467                         " waiting!\n", ctlr);
1468 );
1469         } 
1470         /*
1471          * Send the cmd
1472          */
1473         info_p->access.submit_command(info_p, c);
1474         complete = pollcomplete(ctlr);
1475         
1476         pci_unmap_single(info_p->pci_dev, (dma_addr_t) c->req.sg[0].addr, 
1477                 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1478         if (complete != 1) {
1479                 if (complete != c->busaddr) {
1480                         printk( KERN_WARNING
1481                         "cpqarray ida%d: idaSendPciCmd "
1482                       "Invalid command list address returned! (%08lx)\n",
1483                                 ctlr, (unsigned long)complete);
1484                         cmd_free(info_p, c, 1);
1485                         return (IO_ERROR);
1486                 }
1487         } else {
1488                 printk( KERN_WARNING
1489                         "cpqarray ida%d: idaSendPciCmd Timeout out, "
1490                         "No command list address returned!\n",
1491                         ctlr);
1492                 cmd_free(info_p, c, 1);
1493                 return (IO_ERROR);
1494         }
1495
1496         if (c->req.hdr.rcode & 0x00FE) {
1497                 if (!(c->req.hdr.rcode & BIG_PROBLEM)) {
1498                         printk( KERN_WARNING
1499                         "cpqarray ida%d: idaSendPciCmd, error: "
1500                                 "Controller failed at init time "
1501                                 "cmd: 0x%x, return code = 0x%x\n",
1502                                 ctlr, c->req.hdr.cmd, c->req.hdr.rcode);
1503
1504                         cmd_free(info_p, c, 1);
1505                         return (IO_ERROR);
1506                 }
1507         }
1508         cmd_free(info_p, c, 1);
1509         return (IO_OK);
1510 }
1511
1512 /*
1513  * revalidate_allvol is for online array config utilities.  After a
1514  * utility reconfigures the drives in the array, it can use this function
1515  * (through an ioctl) to make the driver zap any previous disk structs for
1516  * that controller and get new ones.
1517  *
1518  * Right now I'm using the getgeometry() function to do this, but this
1519  * function should probably be finer grained and allow you to revalidate one
1520  * particualar logical volume (instead of all of them on a particular
1521  * controller).
1522  */
1523 static int revalidate_allvol(ctlr_info_t *host)
1524 {
1525         int ctlr = host->ctlr;
1526         int i;
1527         unsigned long flags;
1528
1529         spin_lock_irqsave(IDA_LOCK(ctlr), flags);
1530         if (host->usage_count > 1) {
1531                 spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1532                 printk(KERN_WARNING "cpqarray: Device busy for volume"
1533                         " revalidation (usage=%d)\n", host->usage_count);
1534                 return -EBUSY;
1535         }
1536         host->usage_count++;
1537         spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1538
1539         /*
1540          * Set the partition and block size structures for all volumes
1541          * on this controller to zero.  We will reread all of this data
1542          */
1543         set_capacity(ida_gendisk[ctlr][0], 0);
1544         for (i = 1; i < NWD; i++) {
1545                 struct gendisk *disk = ida_gendisk[ctlr][i];
1546                 if (disk->flags & GENHD_FL_UP)
1547                         del_gendisk(disk);
1548         }
1549         memset(host->drv, 0, sizeof(drv_info_t)*NWD);
1550
1551         /*
1552          * Tell the array controller not to give us any interrupts while
1553          * we check the new geometry.  Then turn interrupts back on when
1554          * we're done.
1555          */
1556         host->access.set_intr_mask(host, 0);
1557         getgeometry(ctlr);
1558         host->access.set_intr_mask(host, FIFO_NOT_EMPTY);
1559
1560         for(i=0; i<NWD; i++) {
1561                 struct gendisk *disk = ida_gendisk[ctlr][i];
1562                 drv_info_t *drv = &host->drv[i];
1563                 if (i && !drv->nr_blks)
1564                         continue;
1565                 blk_queue_hardsect_size(host->queue, drv->blk_size);
1566                 set_capacity(disk, drv->nr_blks);
1567                 disk->queue = host->queue;
1568                 disk->private_data = drv;
1569                 if (i)
1570                         add_disk(disk);
1571         }
1572
1573         host->usage_count--;
1574         return 0;
1575 }
1576
1577 static int ida_revalidate(struct gendisk *disk)
1578 {
1579         drv_info_t *drv = disk->private_data;
1580         set_capacity(disk, drv->nr_blks);
1581         return 0;
1582 }
1583
1584 /********************************************************************
1585     name: pollcomplete
1586     Wait polling for a command to complete.
1587     The memory mapped FIFO is polled for the completion.
1588     Used only at init time, interrupts disabled.
1589  ********************************************************************/
1590 static int pollcomplete(int ctlr)
1591 {
1592         int done;
1593         int i;
1594
1595         /* Wait (up to 2 seconds) for a command to complete */
1596
1597         for (i = 200000; i > 0; i--) {
1598                 done = hba[ctlr]->access.command_completed(hba[ctlr]);
1599                 if (done == 0) {
1600                         udelay(10);     /* a short fixed delay */
1601                 } else
1602                         return (done);
1603         }
1604         /* Invalid address to tell caller we ran out of time */
1605         return 1;
1606 }
1607 /*****************************************************************
1608     start_fwbk
1609     Starts controller firmwares background processing. 
1610     Currently only the Integrated Raid controller needs this done.
1611     If the PCI mem address registers are written to after this, 
1612          data corruption may occur
1613 *****************************************************************/
1614 static void start_fwbk(int ctlr)
1615 {
1616                 id_ctlr_t *id_ctlr_buf; 
1617         int ret_code;
1618
1619         if(     (hba[ctlr]->board_id != 0x40400E11)
1620                 && (hba[ctlr]->board_id != 0x40480E11) )
1621
1622         /* Not a Integrated Raid, so there is nothing for us to do */
1623                 return;
1624         printk(KERN_DEBUG "cpqarray: Starting firmware's background"
1625                 " processing\n");
1626         /* Command does not return anything, but idasend command needs a 
1627                 buffer */
1628         id_ctlr_buf = kmalloc(sizeof(id_ctlr_t), GFP_KERNEL);
1629         if(id_ctlr_buf==NULL)
1630         {
1631                 printk(KERN_WARNING "cpqarray: Out of memory. "
1632                         "Unable to start background processing.\n");
1633                 return;
1634         }               
1635         ret_code = sendcmd(RESUME_BACKGROUND_ACTIVITY, ctlr, 
1636                 id_ctlr_buf, 0, 0, 0, 0);
1637         if(ret_code != IO_OK)
1638                 printk(KERN_WARNING "cpqarray: Unable to start"
1639                         " background processing\n");
1640
1641         kfree(id_ctlr_buf);
1642 }
1643 /*****************************************************************
1644     getgeometry
1645     Get ida logical volume geometry from the controller 
1646     This is a large bit of code which once existed in two flavors,
1647     It is used only at init time.
1648 *****************************************************************/
1649 static void getgeometry(int ctlr)
1650 {                               
1651         id_log_drv_t *id_ldrive;
1652         id_ctlr_t *id_ctlr_buf;
1653         sense_log_drv_stat_t *id_lstatus_buf;
1654         config_t *sense_config_buf;
1655         unsigned int log_unit, log_index;
1656         int ret_code, size;
1657         drv_info_t *drv;
1658         ctlr_info_t *info_p = hba[ctlr];
1659         int i;
1660
1661         info_p->log_drv_map = 0;        
1662         
1663         id_ldrive = kmalloc(sizeof(id_log_drv_t), GFP_KERNEL);
1664         if(id_ldrive == NULL)
1665         {
1666                 printk( KERN_ERR "cpqarray:  out of memory.\n");
1667                 return;
1668         }
1669
1670         id_ctlr_buf = kmalloc(sizeof(id_ctlr_t), GFP_KERNEL);
1671         if(id_ctlr_buf == NULL)
1672         {
1673                 kfree(id_ldrive);
1674                 printk( KERN_ERR "cpqarray:  out of memory.\n");
1675                 return;
1676         }
1677
1678         id_lstatus_buf = kmalloc(sizeof(sense_log_drv_stat_t), GFP_KERNEL);
1679         if(id_lstatus_buf == NULL)
1680         {
1681                 kfree(id_ctlr_buf);
1682                 kfree(id_ldrive);
1683                 printk( KERN_ERR "cpqarray:  out of memory.\n");
1684                 return;
1685         }
1686
1687         sense_config_buf = kmalloc(sizeof(config_t), GFP_KERNEL);
1688         if(sense_config_buf == NULL)
1689         {
1690                 kfree(id_lstatus_buf);
1691                 kfree(id_ctlr_buf);
1692                 kfree(id_ldrive);
1693                 printk( KERN_ERR "cpqarray:  out of memory.\n");
1694                 return;
1695         }
1696
1697         memset(id_ldrive, 0, sizeof(id_log_drv_t));
1698         memset(id_ctlr_buf, 0, sizeof(id_ctlr_t));
1699         memset(id_lstatus_buf, 0, sizeof(sense_log_drv_stat_t));
1700         memset(sense_config_buf, 0, sizeof(config_t));
1701
1702         info_p->phys_drives = 0;
1703         info_p->log_drv_map = 0;
1704         info_p->drv_assign_map = 0;
1705         info_p->drv_spare_map = 0;
1706         info_p->mp_failed_drv_map = 0;  /* only initialized here */
1707         /* Get controllers info for this logical drive */
1708         ret_code = sendcmd(ID_CTLR, ctlr, id_ctlr_buf, 0, 0, 0, 0);
1709         if (ret_code == IO_ERROR) {
1710                 /*
1711                  * If can't get controller info, set the logical drive map to 0,
1712                  * so the idastubopen will fail on all logical drives
1713                  * on the controller.
1714                  */
1715                  /* Free all the buffers and return */ 
1716                 printk(KERN_ERR "cpqarray: error sending ID controller\n");
1717                 kfree(sense_config_buf);
1718                 kfree(id_lstatus_buf);
1719                 kfree(id_ctlr_buf);
1720                 kfree(id_ldrive);
1721                 return;
1722         }
1723
1724         info_p->log_drives = id_ctlr_buf->nr_drvs;
1725         for(i=0;i<4;i++)
1726                 info_p->firm_rev[i] = id_ctlr_buf->firm_rev[i];
1727         info_p->ctlr_sig = id_ctlr_buf->cfg_sig;
1728
1729         printk(" (%s)\n", info_p->product_name);
1730         /*
1731          * Initialize logical drive map to zero
1732          */
1733         log_index = 0;
1734         /*
1735          * Get drive geometry for all logical drives
1736          */
1737         if (id_ctlr_buf->nr_drvs > 16)
1738                 printk(KERN_WARNING "cpqarray ida%d:  This driver supports "
1739                         "16 logical drives per controller.\n.  "
1740                         " Additional drives will not be "
1741                         "detected\n", ctlr);
1742
1743         for (log_unit = 0;
1744              (log_index < id_ctlr_buf->nr_drvs)
1745              && (log_unit < NWD);
1746              log_unit++) {
1747                 size = sizeof(sense_log_drv_stat_t);
1748
1749                 /*
1750                    Send "Identify logical drive status" cmd
1751                  */
1752                 ret_code = sendcmd(SENSE_LOG_DRV_STAT,
1753                              ctlr, id_lstatus_buf, size, 0, 0, log_unit);
1754                 if (ret_code == IO_ERROR) {
1755                         /*
1756                            If can't get logical drive status, set
1757                            the logical drive map to 0, so the
1758                            idastubopen will fail for all logical drives
1759                            on the controller. 
1760                          */
1761                         info_p->log_drv_map = 0;        
1762                         printk( KERN_WARNING
1763                              "cpqarray ida%d: idaGetGeometry - Controller"
1764                                 " failed to report status of logical drive %d\n"
1765                          "Access to this controller has been disabled\n",
1766                                 ctlr, log_unit);
1767                         /* Free all the buffers and return */
1768                         kfree(sense_config_buf);
1769                         kfree(id_lstatus_buf);
1770                         kfree(id_ctlr_buf);
1771                         kfree(id_ldrive);
1772                         return;
1773                 }
1774                 /*
1775                    Make sure the logical drive is configured
1776                  */
1777                 if (id_lstatus_buf->status != LOG_NOT_CONF) {
1778                         ret_code = sendcmd(ID_LOG_DRV, ctlr, id_ldrive,
1779                                sizeof(id_log_drv_t), 0, 0, log_unit);
1780                         /*
1781                            If error, the bit for this
1782                            logical drive won't be set and
1783                            idastubopen will return error. 
1784                          */
1785                         if (ret_code != IO_ERROR) {
1786                                 drv = &info_p->drv[log_unit];
1787                                 drv->blk_size = id_ldrive->blk_size;
1788                                 drv->nr_blks = id_ldrive->nr_blks;
1789                                 drv->cylinders = id_ldrive->drv.cyl;
1790                                 drv->heads = id_ldrive->drv.heads;
1791                                 drv->sectors = id_ldrive->drv.sect_per_track;
1792                                 info_p->log_drv_map |=  (1 << log_unit);
1793
1794         printk(KERN_INFO "cpqarray ida/c%dd%d: blksz=%d nr_blks=%d\n",
1795                 ctlr, log_unit, drv->blk_size, drv->nr_blks);
1796                                 ret_code = sendcmd(SENSE_CONFIG,
1797                                                   ctlr, sense_config_buf,
1798                                  sizeof(config_t), 0, 0, log_unit);
1799                                 if (ret_code == IO_ERROR) {
1800                                         info_p->log_drv_map = 0;
1801                                         /* Free all the buffers and return */
1802                                         printk(KERN_ERR "cpqarray: error sending sense config\n");
1803                                         kfree(sense_config_buf);
1804                                         kfree(id_lstatus_buf);
1805                                         kfree(id_ctlr_buf);
1806                                         kfree(id_ldrive);
1807                                         return;
1808
1809                                 }
1810
1811                                 info_p->phys_drives =
1812                                     sense_config_buf->ctlr_phys_drv;
1813                                 info_p->drv_assign_map
1814                                     |= sense_config_buf->drv_asgn_map;
1815                                 info_p->drv_assign_map
1816                                     |= sense_config_buf->spare_asgn_map;
1817                                 info_p->drv_spare_map
1818                                     |= sense_config_buf->spare_asgn_map;
1819                         }       /* end of if no error on id_ldrive */
1820                         log_index = log_index + 1;
1821                 }               /* end of if logical drive configured */
1822         }                       /* end of for log_unit */
1823         kfree(sense_config_buf);
1824         kfree(id_ldrive);
1825         kfree(id_lstatus_buf);
1826         kfree(id_ctlr_buf);
1827         return;
1828
1829 }
1830
1831 static void __exit cpqarray_exit(void)
1832 {
1833         int i;
1834
1835         pci_unregister_driver(&cpqarray_pci_driver);
1836
1837         /* Double check that all controller entries have been removed */
1838         for(i=0; i<MAX_CTLR; i++) {
1839                 if (hba[i] != NULL) {
1840                         printk(KERN_WARNING "cpqarray: Removing EISA "
1841                                         "controller %d\n", i);
1842                         cpqarray_remove_one_eisa(i);
1843                 }
1844         }
1845
1846         remove_proc_entry("cpqarray", proc_root_driver);
1847 }
1848
1849 module_init(cpqarray_init)
1850 module_exit(cpqarray_exit)