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cciss: enqueue and submit io
[net-next-2.6.git] / drivers / block / cciss.c
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1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 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
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68MODULE_VERSION("3.6.20");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
2ec24ff1
SC		 71static int cciss_allow_hpsa;
72module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
73MODULE_PARM_DESC(cciss_allow_hpsa,
74 "Prevent cciss driver from accessing hardware known to be "
75 " supported by the hpsa driver");
76
1da177e4
LT		 77#include "cciss_cmd.h"
78#include "cciss.h"
79#include <linux/cciss_ioctl.h>
80
81/* define the PCI info for the cards we can control */
82static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
90 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
91 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
1da177e4
LT		 110 {0,}
111};
7c832835 112
1da177e4
LT		 113MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
114
1da177e4
LT		 115/* board_id = Subsystem Device ID & Vendor ID
116 * product = Marketing Name for the board
7c832835 117 * access = Address of the struct of function pointers
1da177e4
LT		 118 */
119static struct board_type products[] = {
49153998
MM		 120 {0x40700E11, "Smart Array 5300", &SA5_access},
121 {0x40800E11, "Smart Array 5i", &SA5B_access},
122 {0x40820E11, "Smart Array 532", &SA5B_access},
123 {0x40830E11, "Smart Array 5312", &SA5B_access},
124 {0x409A0E11, "Smart Array 641", &SA5_access},
125 {0x409B0E11, "Smart Array 642", &SA5_access},
126 {0x409C0E11, "Smart Array 6400", &SA5_access},
127 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
128 {0x40910E11, "Smart Array 6i", &SA5_access},
129 {0x3225103C, "Smart Array P600", &SA5_access},
49153998
MM		 130 {0x3235103C, "Smart Array P400i", &SA5_access},
131 {0x3211103C, "Smart Array E200i", &SA5_access},
132 {0x3212103C, "Smart Array E200", &SA5_access},
133 {0x3213103C, "Smart Array E200i", &SA5_access},
134 {0x3214103C, "Smart Array E200i", &SA5_access},
135 {0x3215103C, "Smart Array E200i", &SA5_access},
136 {0x3237103C, "Smart Array E500", &SA5_access},
2ec24ff1
SC		 137/* controllers below this line are also supported by the hpsa driver. */
138#define HPSA_BOUNDARY 0x3223103C
139 {0x3223103C, "Smart Array P800", &SA5_access},
140 {0x3234103C, "Smart Array P400", &SA5_access},
49153998
MM		 141 {0x323D103C, "Smart Array P700m", &SA5_access},
142 {0x3241103C, "Smart Array P212", &SA5_access},
143 {0x3243103C, "Smart Array P410", &SA5_access},
144 {0x3245103C, "Smart Array P410i", &SA5_access},
145 {0x3247103C, "Smart Array P411", &SA5_access},
146 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 147 {0x324A103C, "Smart Array P712m", &SA5_access},
148 {0x324B103C, "Smart Array P711m", &SA5_access},
1da177e4
LT		 149};
150
d14c4ab5 151/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 152#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 153#define MAX_IOCTL_CONFIG_WAIT 1000
154
155/*define how many times we will try a command because of bus resets */
156#define MAX_CMD_RETRIES 3
157
1da177e4
LT		 158#define MAX_CTLR 32
159
160/* Originally cciss driver only supports 8 major numbers */
161#define MAX_CTLR_ORIG 8
162
1da177e4
LT		 163static ctlr_info_t *hba[MAX_CTLR];
164
b368c9dd
AP		 165static struct task_struct *cciss_scan_thread;
166static DEFINE_MUTEX(scan_mutex);
167static LIST_HEAD(scan_q);
168
165125e1 169static void do_cciss_request(struct request_queue *q);
7d12e780 170static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 171static int cciss_open(struct block_device *bdev, fmode_t mode);
172static int cciss_release(struct gendisk *disk, fmode_t mode);
173static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 174 unsigned int cmd, unsigned long arg);
a885c8c4 175static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 176
1da177e4 177static int cciss_revalidate(struct gendisk *disk);
2d11d993 178static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 179static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 180 int clear_all, int via_ioctl);
1da177e4 181
7b838bde 182static void cciss_read_capacity(int ctlr, int logvol,
00988a35 183 sector_t *total_size, unsigned int *block_size);
7b838bde 184static void cciss_read_capacity_16(int ctlr, int logvol,
00988a35
MMOD		 185 sector_t *total_size, unsigned int *block_size);
186static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 187 sector_t total_size,
00988a35 188 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 189 drive_info_struct *drv);
7c832835
BH		 190static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
191 __u32);
192static void start_io(ctlr_info_t *h);
7c832835 193static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 194 __u8 page_code, unsigned char scsi3addr[],
195 int cmd_type);
85cc61ae 196static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
197 int attempt_retry);
198static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 199
33079b21 200static void fail_all_cmds(unsigned long ctlr);
d6f4965d 201static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 202static int scan_thread(void *data);
203static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 204static void cciss_hba_release(struct device *dev);
205static void cciss_device_release(struct device *dev);
361e9b07 206static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
9cef0d2f 207static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
33079b21 208
1da177e4 209#ifdef CONFIG_PROC_FS
1da177e4
LT		 210static void cciss_procinit(int i);
211#else
7c832835
BH		 212static void cciss_procinit(int i)
213{
214}
215#endif /* CONFIG_PROC_FS */
1da177e4
LT		 216
217#ifdef CONFIG_COMPAT
ef7822c2
AV		 218static int cciss_compat_ioctl(struct block_device *, fmode_t,
219 unsigned, unsigned long);
1da177e4
LT		 220#endif
221
83d5cde4 222static const struct block_device_operations cciss_fops = {
7c832835 223 .owner = THIS_MODULE,
ef7822c2
AV		 224 .open = cciss_open,
225 .release = cciss_release,
226 .locked_ioctl = cciss_ioctl,
7c832835 227 .getgeo = cciss_getgeo,
1da177e4 228#ifdef CONFIG_COMPAT
ef7822c2 229 .compat_ioctl = cciss_compat_ioctl,
1da177e4 230#endif
7c832835 231 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 232};
233
234/*
235 * Enqueuing and dequeuing functions for cmdlists.
236 */
8a3173de 237static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 238{
8a3173de 239 hlist_add_head(&c->list, list);
1da177e4
LT		 240}
241
8a3173de 242static inline void removeQ(CommandList_struct *c)
1da177e4 243{
b59e64d0
HR		 244 /*
245 * After kexec/dump some commands might still
246 * be in flight, which the firmware will try
247 * to complete. Resetting the firmware doesn't work
248 * with old fw revisions, so we have to mark
249 * them off as 'stale' to prevent the driver from
250 * falling over.
251 */
252 if (WARN_ON(hlist_unhashed(&c->list))) {
253 c->cmd_type = CMD_MSG_STALE;
8a3173de 254 return;
b59e64d0 255 }
8a3173de
JA		 256
257 hlist_del_init(&c->list);
1da177e4
LT		 258}
259
664a717d
MM		 260static void enqueue_cmd_and_start_io(ctlr_info_t *h,
261 CommandList_struct *c)
262{
263 unsigned long flags;
264 spin_lock_irqsave(&h->lock, flags);
265 addQ(&h->reqQ, c);
266 h->Qdepth++;
267 start_io(h);
268 spin_unlock_irqrestore(&h->lock, flags);
269}
270
dccc9b56 271static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
49fc5601
SC		 272 int nr_cmds)
273{
274 int i;
275
276 if (!cmd_sg_list)
277 return;
278 for (i = 0; i < nr_cmds; i++) {
dccc9b56
SC		 279 kfree(cmd_sg_list[i]);
280 cmd_sg_list[i] = NULL;
49fc5601
SC		 281 }
282 kfree(cmd_sg_list);
283}
284
dccc9b56
SC		 285static SGDescriptor_struct **cciss_allocate_sg_chain_blocks(
286 ctlr_info_t *h, int chainsize, int nr_cmds)
49fc5601
SC		 287{
288 int j;
dccc9b56 289 SGDescriptor_struct **cmd_sg_list;
49fc5601
SC		 290
291 if (chainsize <= 0)
292 return NULL;
293
294 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
295 if (!cmd_sg_list)
296 return NULL;
297
298 /* Build up chain blocks for each command */
299 for (j = 0; j < nr_cmds; j++) {
49fc5601 300 /* Need a block of chainsized s/g elements. */
dccc9b56
SC		 301 cmd_sg_list[j] = kmalloc((chainsize *
302 sizeof(*cmd_sg_list[j])), GFP_KERNEL);
303 if (!cmd_sg_list[j]) {
49fc5601
SC		 304 dev_err(&h->pdev->dev, "Cannot get memory "
305 "for s/g chains.\n");
306 goto clean;
307 }
308 }
309 return cmd_sg_list;
310clean:
311 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
312 return NULL;
313}
314
d45033ef
SC		 315static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c)
316{
317 SGDescriptor_struct *chain_sg;
318 u64bit temp64;
319
320 if (c->Header.SGTotal <= h->max_cmd_sgentries)
321 return;
322
323 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
324 temp64.val32.lower = chain_sg->Addr.lower;
325 temp64.val32.upper = chain_sg->Addr.upper;
326 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
327}
328
329static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c,
330 SGDescriptor_struct *chain_block, int len)
331{
332 SGDescriptor_struct *chain_sg;
333 u64bit temp64;
334
335 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
336 chain_sg->Ext = CCISS_SG_CHAIN;
337 chain_sg->Len = len;
338 temp64.val = pci_map_single(h->pdev, chain_block, len,
339 PCI_DMA_TODEVICE);
340 chain_sg->Addr.lower = temp64.val32.lower;
341 chain_sg->Addr.upper = temp64.val32.upper;
342}
343
1da177e4
LT		 344#include "cciss_scsi.c" /* For SCSI tape support */
345
1e6f2dc1
AB		 346static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
347 "UNKNOWN"
348};
349#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
0f5486ec 350
1da177e4
LT		 351#ifdef CONFIG_PROC_FS
352
353/*
354 * Report information about this controller.
355 */
356#define ENG_GIG 1000000000
357#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 358#define ENGAGE_SCSI "engage scsi"
1da177e4
LT		 359
360static struct proc_dir_entry *proc_cciss;
361
89b6e743 362static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 363{
89b6e743
MM		 364 ctlr_info_t *h = seq->private;
365
366 seq_printf(seq, "%s: HP %s Controller\n"
367 "Board ID: 0x%08lx\n"
368 "Firmware Version: %c%c%c%c\n"
369 "IRQ: %d\n"
370 "Logical drives: %d\n"
371 "Current Q depth: %d\n"
372 "Current # commands on controller: %d\n"
373 "Max Q depth since init: %d\n"
374 "Max # commands on controller since init: %d\n"
375 "Max SG entries since init: %d\n",
376 h->devname,
377 h->product_name,
378 (unsigned long)h->board_id,
379 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
380 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
381 h->num_luns,
382 h->Qdepth, h->commands_outstanding,
383 h->maxQsinceinit, h->max_outstanding, h->maxSG);
384
385#ifdef CONFIG_CISS_SCSI_TAPE
386 cciss_seq_tape_report(seq, h->ctlr);
387#endif /* CONFIG_CISS_SCSI_TAPE */
388}
1da177e4 389
89b6e743
MM		 390static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
391{
392 ctlr_info_t *h = seq->private;
393 unsigned ctlr = h->ctlr;
394 unsigned long flags;
1da177e4
LT		 395
396 /* prevent displaying bogus info during configuration
397 * or deconfiguration of a logical volume
398 */
399 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
400 if (h->busy_configuring) {
401 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 402 return ERR_PTR(-EBUSY);
1da177e4
LT		 403 }
404 h->busy_configuring = 1;
405 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
406
89b6e743
MM		 407 if (*pos == 0)
408 cciss_seq_show_header(seq);
409
410 return pos;
411}
412
413static int cciss_seq_show(struct seq_file *seq, void *v)
414{
415 sector_t vol_sz, vol_sz_frac;
416 ctlr_info_t *h = seq->private;
417 unsigned ctlr = h->ctlr;
418 loff_t *pos = v;
9cef0d2f 419 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 420
421 if (*pos > h->highest_lun)
422 return 0;
423
531c2dc7
SC		 424 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
425 return 0;
426
89b6e743
MM		 427 if (drv->heads == 0)
428 return 0;
429
430 vol_sz = drv->nr_blocks;
431 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
432 vol_sz_frac *= 100;
433 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
434
fa52bec9 435 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 436 drv->raid_level = RAID_UNKNOWN;
437 seq_printf(seq, "cciss/c%dd%d:"
438 "\t%4u.%02uGB\tRAID %s\n",
439 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
440 raid_label[drv->raid_level]);
441 return 0;
442}
443
444static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
445{
446 ctlr_info_t *h = seq->private;
447
448 if (*pos > h->highest_lun)
449 return NULL;
450 *pos += 1;
451
452 return pos;
453}
454
455static void cciss_seq_stop(struct seq_file *seq, void *v)
456{
457 ctlr_info_t *h = seq->private;
458
459 /* Only reset h->busy_configuring if we succeeded in setting
460 * it during cciss_seq_start. */
461 if (v == ERR_PTR(-EBUSY))
462 return;
7c832835 463
1da177e4 464 h->busy_configuring = 0;
1da177e4
LT		 465}
466
88e9d34c 467static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 468 .start = cciss_seq_start,
469 .show = cciss_seq_show,
470 .next = cciss_seq_next,
471 .stop = cciss_seq_stop,
472};
473
474static int cciss_seq_open(struct inode *inode, struct file *file)
475{
476 int ret = seq_open(file, &cciss_seq_ops);
477 struct seq_file *seq = file->private_data;
478
479 if (!ret)
480 seq->private = PDE(inode)->data;
481
482 return ret;
483}
484
485static ssize_t
486cciss_proc_write(struct file *file, const char __user *buf,
487 size_t length, loff_t *ppos)
1da177e4 488{
89b6e743
MM		 489 int err;
490 char *buffer;
491
492#ifndef CONFIG_CISS_SCSI_TAPE
493 return -EINVAL;
1da177e4
LT		 494#endif
495
89b6e743 496 if (!buf || length > PAGE_SIZE - 1)
7c832835 497 return -EINVAL;
89b6e743
MM		 498
499 buffer = (char *)__get_free_page(GFP_KERNEL);
500 if (!buffer)
501 return -ENOMEM;
502
503 err = -EFAULT;
504 if (copy_from_user(buffer, buf, length))
505 goto out;
506 buffer[length] = '\0';
507
508#ifdef CONFIG_CISS_SCSI_TAPE
509 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
510 struct seq_file *seq = file->private_data;
511 ctlr_info_t *h = seq->private;
89b6e743 512
8721c81f
SC		 513 err = cciss_engage_scsi(h->ctlr);
514 if (err == 0)
89b6e743
MM		 515 err = length;
516 } else
517#endif /* CONFIG_CISS_SCSI_TAPE */
518 err = -EINVAL;
7c832835
BH		 519 /* might be nice to have "disengage" too, but it's not
520 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 521
522out:
523 free_page((unsigned long)buffer);
524 return err;
1da177e4
LT		 525}
526
828c0950 527static const struct file_operations cciss_proc_fops = {
89b6e743
MM		 528 .owner = THIS_MODULE,
529 .open = cciss_seq_open,
530 .read = seq_read,
531 .llseek = seq_lseek,
532 .release = seq_release,
533 .write = cciss_proc_write,
534};
535
1da177e4
LT		 536static void __devinit cciss_procinit(int i)
537{
538 struct proc_dir_entry *pde;
539
89b6e743 540 if (proc_cciss == NULL)
928b4d8c 541 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 542 if (!proc_cciss)
543 return;
3dfcf9c4 544 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 545 S_IROTH, proc_cciss,
3dfcf9c4 546 &cciss_proc_fops, hba[i]);
1da177e4 547}
7c832835 548#endif /* CONFIG_PROC_FS */
1da177e4 549
7fe06326
AP		 550#define MAX_PRODUCT_NAME_LEN 19
551
552#define to_hba(n) container_of(n, struct ctlr_info, dev)
553#define to_drv(n) container_of(n, drive_info_struct, dev)
554
d6f4965d
AP		 555static ssize_t host_store_rescan(struct device *dev,
556 struct device_attribute *attr,
557 const char *buf, size_t count)
558{
559 struct ctlr_info *h = to_hba(dev);
560
561 add_to_scan_list(h);
562 wake_up_process(cciss_scan_thread);
563 wait_for_completion_interruptible(&h->scan_wait);
564
565 return count;
566}
8ba95c69 567static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 568
569static ssize_t dev_show_unique_id(struct device *dev,
570 struct device_attribute *attr,
571 char *buf)
572{
573 drive_info_struct *drv = to_drv(dev);
574 struct ctlr_info *h = to_hba(drv->dev.parent);
575 __u8 sn[16];
576 unsigned long flags;
577 int ret = 0;
578
579 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
580 if (h->busy_configuring)
581 ret = -EBUSY;
582 else
583 memcpy(sn, drv->serial_no, sizeof(sn));
584 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
585
586 if (ret)
587 return ret;
588 else
589 return snprintf(buf, 16 * 2 + 2,
590 "%02X%02X%02X%02X%02X%02X%02X%02X"
591 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
592 sn[0], sn[1], sn[2], sn[3],
593 sn[4], sn[5], sn[6], sn[7],
594 sn[8], sn[9], sn[10], sn[11],
595 sn[12], sn[13], sn[14], sn[15]);
596}
8ba95c69 597static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP		 598
599static ssize_t dev_show_vendor(struct device *dev,
600 struct device_attribute *attr,
601 char *buf)
602{
603 drive_info_struct *drv = to_drv(dev);
604 struct ctlr_info *h = to_hba(drv->dev.parent);
605 char vendor[VENDOR_LEN + 1];
606 unsigned long flags;
607 int ret = 0;
608
609 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
610 if (h->busy_configuring)
611 ret = -EBUSY;
612 else
613 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
614 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
615
616 if (ret)
617 return ret;
618 else
619 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
620}
8ba95c69 621static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP		 622
623static ssize_t dev_show_model(struct device *dev,
624 struct device_attribute *attr,
625 char *buf)
626{
627 drive_info_struct *drv = to_drv(dev);
628 struct ctlr_info *h = to_hba(drv->dev.parent);
629 char model[MODEL_LEN + 1];
630 unsigned long flags;
631 int ret = 0;
632
633 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
634 if (h->busy_configuring)
635 ret = -EBUSY;
636 else
637 memcpy(model, drv->model, MODEL_LEN + 1);
638 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
639
640 if (ret)
641 return ret;
642 else
643 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
644}
8ba95c69 645static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP		 646
647static ssize_t dev_show_rev(struct device *dev,
648 struct device_attribute *attr,
649 char *buf)
650{
651 drive_info_struct *drv = to_drv(dev);
652 struct ctlr_info *h = to_hba(drv->dev.parent);
653 char rev[REV_LEN + 1];
654 unsigned long flags;
655 int ret = 0;
656
657 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
658 if (h->busy_configuring)
659 ret = -EBUSY;
660 else
661 memcpy(rev, drv->rev, REV_LEN + 1);
662 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
663
664 if (ret)
665 return ret;
666 else
667 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
668}
8ba95c69 669static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 670
ce84a8ae
SC		 671static ssize_t cciss_show_lunid(struct device *dev,
672 struct device_attribute *attr, char *buf)
673{
9cef0d2f
SC		 674 drive_info_struct *drv = to_drv(dev);
675 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 676 unsigned long flags;
677 unsigned char lunid[8];
678
679 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
680 if (h->busy_configuring) {
681 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
682 return -EBUSY;
683 }
684 if (!drv->heads) {
685 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
686 return -ENOTTY;
687 }
688 memcpy(lunid, drv->LunID, sizeof(lunid));
689 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
690 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
691 lunid[0], lunid[1], lunid[2], lunid[3],
692 lunid[4], lunid[5], lunid[6], lunid[7]);
693}
8ba95c69 694static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 695
3ff1111d
SC		 696static ssize_t cciss_show_raid_level(struct device *dev,
697 struct device_attribute *attr, char *buf)
698{
9cef0d2f
SC		 699 drive_info_struct *drv = to_drv(dev);
700 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 701 int raid;
702 unsigned long flags;
703
704 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
705 if (h->busy_configuring) {
706 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
707 return -EBUSY;
708 }
709 raid = drv->raid_level;
710 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
711 if (raid < 0 || raid > RAID_UNKNOWN)
712 raid = RAID_UNKNOWN;
713
714 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
715 raid_label[raid]);
716}
8ba95c69 717static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 718
e272afec
SC		 719static ssize_t cciss_show_usage_count(struct device *dev,
720 struct device_attribute *attr, char *buf)
721{
9cef0d2f
SC		 722 drive_info_struct *drv = to_drv(dev);
723 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 724 unsigned long flags;
725 int count;
726
727 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
728 if (h->busy_configuring) {
729 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
730 return -EBUSY;
731 }
732 count = drv->usage_count;
733 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
734 return snprintf(buf, 20, "%d\n", count);
735}
8ba95c69 736static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 737
d6f4965d
AP		 738static struct attribute *cciss_host_attrs[] = {
739 &dev_attr_rescan.attr,
740 NULL
741};
742
743static struct attribute_group cciss_host_attr_group = {
744 .attrs = cciss_host_attrs,
745};
746
9f792d9f 747static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP		 748 &cciss_host_attr_group,
749 NULL
750};
751
752static struct device_type cciss_host_type = {
753 .name = "cciss_host",
754 .groups = cciss_host_attr_groups,
617e1344 755 .release = cciss_hba_release,
d6f4965d
AP		 756};
757
7fe06326
AP		 758static struct attribute *cciss_dev_attrs[] = {
759 &dev_attr_unique_id.attr,
760 &dev_attr_model.attr,
761 &dev_attr_vendor.attr,
762 &dev_attr_rev.attr,
ce84a8ae 763 &dev_attr_lunid.attr,
3ff1111d 764 &dev_attr_raid_level.attr,
e272afec 765 &dev_attr_usage_count.attr,
7fe06326
AP		 766 NULL
767};
768
769static struct attribute_group cciss_dev_attr_group = {
770 .attrs = cciss_dev_attrs,
771};
772
a4dbd674 773static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 774 &cciss_dev_attr_group,
775 NULL
776};
777
778static struct device_type cciss_dev_type = {
779 .name = "cciss_device",
780 .groups = cciss_dev_attr_groups,
617e1344 781 .release = cciss_device_release,
7fe06326
AP		 782};
783
784static struct bus_type cciss_bus_type = {
785 .name = "cciss",
786};
787
617e1344
SC		 788/*
789 * cciss_hba_release is called when the reference count
790 * of h->dev goes to zero.
791 */
792static void cciss_hba_release(struct device *dev)
793{
794 /*
795 * nothing to do, but need this to avoid a warning
796 * about not having a release handler from lib/kref.c.
797 */
798}
7fe06326
AP		 799
800/*
801 * Initialize sysfs entry for each controller. This sets up and registers
802 * the 'cciss#' directory for each individual controller under
803 * /sys/bus/pci/devices/<dev>/.
804 */
805static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
806{
807 device_initialize(&h->dev);
808 h->dev.type = &cciss_host_type;
809 h->dev.bus = &cciss_bus_type;
810 dev_set_name(&h->dev, "%s", h->devname);
811 h->dev.parent = &h->pdev->dev;
812
813 return device_add(&h->dev);
814}
815
816/*
817 * Remove sysfs entries for an hba.
818 */
819static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
820{
821 device_del(&h->dev);
617e1344
SC		 822 put_device(&h->dev); /* final put. */
823}
824
825/* cciss_device_release is called when the reference count
9cef0d2f 826 * of h->drv[x]dev goes to zero.
617e1344
SC		 827 */
828static void cciss_device_release(struct device *dev)
829{
9cef0d2f
SC		 830 drive_info_struct *drv = to_drv(dev);
831 kfree(drv);
7fe06326
AP		 832}
833
834/*
835 * Initialize sysfs for each logical drive. This sets up and registers
836 * the 'c#d#' directory for each individual logical drive under
837 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
838 * /sys/block/cciss!c#d# to this entry.
839 */
617e1344 840static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 841 int drv_index)
842{
617e1344
SC		 843 struct device *dev;
844
9cef0d2f 845 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 846 return 0;
847
9cef0d2f 848 dev = &h->drv[drv_index]->dev;
617e1344
SC		 849 device_initialize(dev);
850 dev->type = &cciss_dev_type;
851 dev->bus = &cciss_bus_type;
852 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
853 dev->parent = &h->dev;
9cef0d2f 854 h->drv[drv_index]->device_initialized = 1;
617e1344 855 return device_add(dev);
7fe06326
AP		 856}
857
858/*
859 * Remove sysfs entries for a logical drive.
860 */
8ce51966
SC		 861static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
862 int ctlr_exiting)
7fe06326 863{
9cef0d2f 864 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 865
866 /* special case for c*d0, we only destroy it on controller exit */
867 if (drv_index == 0 && !ctlr_exiting)
868 return;
869
617e1344
SC		 870 device_del(dev);
871 put_device(dev); /* the "final" put. */
9cef0d2f 872 h->drv[drv_index] = NULL;
7fe06326
AP		 873}
874
7c832835
BH		 875/*
876 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 877 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 878 * which ones are free or in use. For operations that can wait for kmalloc
879 * to possible sleep, this routine can be called with get_from_pool set to 0.
880 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
881 */
882static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 883{
884 CommandList_struct *c;
7c832835 885 int i;
1da177e4
LT		 886 u64bit temp64;
887 dma_addr_t cmd_dma_handle, err_dma_handle;
888
7c832835
BH		 889 if (!get_from_pool) {
890 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
891 sizeof(CommandList_struct), &cmd_dma_handle);
892 if (c == NULL)
893 return NULL;
1da177e4
LT		 894 memset(c, 0, sizeof(CommandList_struct));
895
33079b21
MM		 896 c->cmdindex = -1;
897
7c832835
BH		 898 c->err_info = (ErrorInfo_struct *)
899 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
900 &err_dma_handle);
901
902 if (c->err_info == NULL) {
903 pci_free_consistent(h->pdev,
1da177e4
LT		 904 sizeof(CommandList_struct), c, cmd_dma_handle);
905 return NULL;
906 }
907 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 908 } else { /* get it out of the controllers pool */
909
910 do {
f880632f
MM		 911 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
912 if (i == h->nr_cmds)
7c832835
BH		 913 return NULL;
914 } while (test_and_set_bit
915 (i & (BITS_PER_LONG - 1),
916 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 917#ifdef CCISS_DEBUG
918 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
919#endif
7c832835 920 c = h->cmd_pool + i;
1da177e4 921 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 922 cmd_dma_handle = h->cmd_pool_dhandle
923 + i * sizeof(CommandList_struct);
1da177e4
LT		 924 c->err_info = h->errinfo_pool + i;
925 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 926 err_dma_handle = h->errinfo_pool_dhandle
927 + i * sizeof(ErrorInfo_struct);
928 h->nr_allocs++;
33079b21
MM		 929
930 c->cmdindex = i;
7c832835 931 }
1da177e4 932
8a3173de 933 INIT_HLIST_NODE(&c->list);
1da177e4 934 c->busaddr = (__u32) cmd_dma_handle;
7c832835 935 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 936 c->ErrDesc.Addr.lower = temp64.val32.lower;
937 c->ErrDesc.Addr.upper = temp64.val32.upper;
938 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 939
7c832835
BH		 940 c->ctlr = h->ctlr;
941 return c;
1da177e4
LT		 942}
943
7c832835
BH		 944/*
945 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 946 */
947static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
948{
949 int i;
950 u64bit temp64;
951
7c832835 952 if (!got_from_pool) {
1da177e4
LT		 953 temp64.val32.lower = c->ErrDesc.Addr.lower;
954 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 955 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
956 c->err_info, (dma_addr_t) temp64.val);
957 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
958 c, (dma_addr_t) c->busaddr);
959 } else {
1da177e4 960 i = c - h->cmd_pool;
7c832835
BH		 961 clear_bit(i & (BITS_PER_LONG - 1),
962 h->cmd_pool_bits + (i / BITS_PER_LONG));
963 h->nr_frees++;
964 }
1da177e4
LT		 965}
966
967static inline ctlr_info_t *get_host(struct gendisk *disk)
968{
7c832835 969 return disk->queue->queuedata;
1da177e4
LT		 970}
971
972static inline drive_info_struct *get_drv(struct gendisk *disk)
973{
974 return disk->private_data;
975}
976
977/*
978 * Open. Make sure the device is really there.
979 */
ef7822c2 980static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 981{
ef7822c2
AV		 982 ctlr_info_t *host = get_host(bdev->bd_disk);
983 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 984
985#ifdef CCISS_DEBUG
ef7822c2 986 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 987#endif /* CCISS_DEBUG */
1da177e4 988
2e043986 989 if (drv->busy_configuring)
ddd47442 990 return -EBUSY;
1da177e4
LT		 991 /*
992 * Root is allowed to open raw volume zero even if it's not configured
993 * so array config can still work. Root is also allowed to open any
994 * volume that has a LUN ID, so it can issue IOCTL to reread the
995 * disk information. I don't think I really like this
996 * but I'm already using way to many device nodes to claim another one
997 * for "raw controller".
998 */
7a06f789 999 if (drv->heads == 0) {
ef7822c2 1000 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 1001 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 1002 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 1003 return -ENXIO;
1da177e4 1004 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 1005 } else if (memcmp(drv->LunID, CTLR_LUNID,
1006 sizeof(drv->LunID))) {
1da177e4
LT		 1007 return -ENXIO;
1008 }
1009 }
1010 if (!capable(CAP_SYS_ADMIN))
1011 return -EPERM;
1012 }
1013 drv->usage_count++;
1014 host->usage_count++;
1015 return 0;
1016}
7c832835 1017
1da177e4
LT		 1018/*
1019 * Close. Sync first.
1020 */
ef7822c2 1021static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 1022{
ef7822c2
AV		 1023 ctlr_info_t *host = get_host(disk);
1024 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 1025
1026#ifdef CCISS_DEBUG
ef7822c2 1027 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 1028#endif /* CCISS_DEBUG */
1da177e4
LT		 1029
1030 drv->usage_count--;
1031 host->usage_count--;
1032 return 0;
1033}
1034
1035#ifdef CONFIG_COMPAT
1036
ef7822c2
AV		 1037static int do_ioctl(struct block_device *bdev, fmode_t mode,
1038 unsigned cmd, unsigned long arg)
1da177e4
LT		 1039{
1040 int ret;
1041 lock_kernel();
ef7822c2 1042 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1043 unlock_kernel();
1044 return ret;
1045}
1046
ef7822c2
AV		 1047static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1048 unsigned cmd, unsigned long arg);
1049static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1050 unsigned cmd, unsigned long arg);
1da177e4 1051
ef7822c2
AV		 1052static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1053 unsigned cmd, unsigned long arg)
1da177e4
LT		 1054{
1055 switch (cmd) {
1056 case CCISS_GETPCIINFO:
1057 case CCISS_GETINTINFO:
1058 case CCISS_SETINTINFO:
1059 case CCISS_GETNODENAME:
1060 case CCISS_SETNODENAME:
1061 case CCISS_GETHEARTBEAT:
1062 case CCISS_GETBUSTYPES:
1063 case CCISS_GETFIRMVER:
1064 case CCISS_GETDRIVVER:
1065 case CCISS_REVALIDVOLS:
1066 case CCISS_DEREGDISK:
1067 case CCISS_REGNEWDISK:
1068 case CCISS_REGNEWD:
1069 case CCISS_RESCANDISK:
1070 case CCISS_GETLUNINFO:
ef7822c2 1071 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1072
1073 case CCISS_PASSTHRU32:
ef7822c2 1074 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 1075 case CCISS_BIG_PASSTHRU32:
ef7822c2 1076 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 1077
1078 default:
1079 return -ENOIOCTLCMD;
1080 }
1081}
1082
ef7822c2
AV		 1083static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1084 unsigned cmd, unsigned long arg)
1da177e4
LT		 1085{
1086 IOCTL32_Command_struct __user *arg32 =
7c832835 1087 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1088 IOCTL_Command_struct arg64;
1089 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1090 int err;
1091 u32 cp;
1092
1093 err = 0;
7c832835
BH		 1094 err |=
1095 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1096 sizeof(arg64.LUN_info));
1097 err |=
1098 copy_from_user(&arg64.Request, &arg32->Request,
1099 sizeof(arg64.Request));
1100 err |=
1101 copy_from_user(&arg64.error_info, &arg32->error_info,
1102 sizeof(arg64.error_info));
1da177e4
LT		 1103 err |= get_user(arg64.buf_size, &arg32->buf_size);
1104 err |= get_user(cp, &arg32->buf);
1105 arg64.buf = compat_ptr(cp);
1106 err |= copy_to_user(p, &arg64, sizeof(arg64));
1107
1108 if (err)
1109 return -EFAULT;
1110
ef7822c2 1111 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1112 if (err)
1113 return err;
7c832835
BH		 1114 err |=
1115 copy_in_user(&arg32->error_info, &p->error_info,
1116 sizeof(arg32->error_info));
1da177e4
LT		 1117 if (err)
1118 return -EFAULT;
1119 return err;
1120}
1121
ef7822c2
AV		 1122static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1123 unsigned cmd, unsigned long arg)
1da177e4
LT		 1124{
1125 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1126 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1127 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1128 BIG_IOCTL_Command_struct __user *p =
1129 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1130 int err;
1131 u32 cp;
1132
1133 err = 0;
7c832835
BH		 1134 err |=
1135 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1136 sizeof(arg64.LUN_info));
1137 err |=
1138 copy_from_user(&arg64.Request, &arg32->Request,
1139 sizeof(arg64.Request));
1140 err |=
1141 copy_from_user(&arg64.error_info, &arg32->error_info,
1142 sizeof(arg64.error_info));
1da177e4
LT		 1143 err |= get_user(arg64.buf_size, &arg32->buf_size);
1144 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1145 err |= get_user(cp, &arg32->buf);
1146 arg64.buf = compat_ptr(cp);
1147 err |= copy_to_user(p, &arg64, sizeof(arg64));
1148
1149 if (err)
7c832835 1150 return -EFAULT;
1da177e4 1151
ef7822c2 1152 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1153 if (err)
1154 return err;
7c832835
BH		 1155 err |=
1156 copy_in_user(&arg32->error_info, &p->error_info,
1157 sizeof(arg32->error_info));
1da177e4
LT		 1158 if (err)
1159 return -EFAULT;
1160 return err;
1161}
1162#endif
a885c8c4
CH		 1163
1164static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1165{
1166 drive_info_struct *drv = get_drv(bdev->bd_disk);
1167
1168 if (!drv->cylinders)
1169 return -ENXIO;
1170
1171 geo->heads = drv->heads;
1172 geo->sectors = drv->sectors;
1173 geo->cylinders = drv->cylinders;
1174 return 0;
1175}
1176
0a9279cc
MM		 1177static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1178{
1179 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1180 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1181 (void)check_for_unit_attention(host, c);
1182}
1da177e4 1183/*
7c832835 1184 * ioctl
1da177e4 1185 */
ef7822c2 1186static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1187 unsigned int cmd, unsigned long arg)
1da177e4 1188{
1da177e4
LT		 1189 struct gendisk *disk = bdev->bd_disk;
1190 ctlr_info_t *host = get_host(disk);
1191 drive_info_struct *drv = get_drv(disk);
1192 int ctlr = host->ctlr;
1193 void __user *argp = (void __user *)arg;
1194
1195#ifdef CCISS_DEBUG
1196 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1197#endif /* CCISS_DEBUG */
1198
1199 switch (cmd) {
1da177e4 1200 case CCISS_GETPCIINFO:
7c832835
BH		 1201 {
1202 cciss_pci_info_struct pciinfo;
1203
1204 if (!arg)
1205 return -EINVAL;
1206 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1207 pciinfo.bus = host->pdev->bus->number;
1208 pciinfo.dev_fn = host->pdev->devfn;
1209 pciinfo.board_id = host->board_id;
1210 if (copy_to_user
1211 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1212 return -EFAULT;
1213 return 0;
1214 }
1da177e4 1215 case CCISS_GETINTINFO:
7c832835
BH		 1216 {
1217 cciss_coalint_struct intinfo;
1218 if (!arg)
1219 return -EINVAL;
1220 intinfo.delay =
1221 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1222 intinfo.count =
1223 readl(&host->cfgtable->HostWrite.CoalIntCount);
1224 if (copy_to_user
1225 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1226 return -EFAULT;
1227 return 0;
1228 }
1da177e4 1229 case CCISS_SETINTINFO:
1da177e4 1230 {
7c832835
BH		 1231 cciss_coalint_struct intinfo;
1232 unsigned long flags;
1233 int i;
1234
1235 if (!arg)
1236 return -EINVAL;
1237 if (!capable(CAP_SYS_ADMIN))
1238 return -EPERM;
1239 if (copy_from_user
1240 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1241 return -EFAULT;
1242 if ((intinfo.delay == 0) && (intinfo.count == 0))
1243 {
1244// printk("cciss_ioctl: delay and count cannot be 0\n");
1245 return -EINVAL;
1246 }
1247 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1248 /* Update the field, and then ring the doorbell */
1249 writel(intinfo.delay,
1250 &(host->cfgtable->HostWrite.CoalIntDelay));
1251 writel(intinfo.count,
1252 &(host->cfgtable->HostWrite.CoalIntCount));
1253 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1254
1255 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1256 if (!(readl(host->vaddr + SA5_DOORBELL)
1257 & CFGTBL_ChangeReq))
1258 break;
1259 /* delay and try again */
1260 udelay(1000);
1261 }
1262 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1263 if (i >= MAX_IOCTL_CONFIG_WAIT)
1264 return -EAGAIN;
1265 return 0;
1da177e4 1266 }
1da177e4 1267 case CCISS_GETNODENAME:
7c832835
BH		 1268 {
1269 NodeName_type NodeName;
1270 int i;
1271
1272 if (!arg)
1273 return -EINVAL;
1274 for (i = 0; i < 16; i++)
1275 NodeName[i] =
1276 readb(&host->cfgtable->ServerName[i]);
1277 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1278 return -EFAULT;
1279 return 0;
1280 }
1da177e4 1281 case CCISS_SETNODENAME:
7c832835
BH		 1282 {
1283 NodeName_type NodeName;
1284 unsigned long flags;
1285 int i;
1286
1287 if (!arg)
1288 return -EINVAL;
1289 if (!capable(CAP_SYS_ADMIN))
1290 return -EPERM;
1291
1292 if (copy_from_user
1293 (NodeName, argp, sizeof(NodeName_type)))
1294 return -EFAULT;
1295
1296 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1297
1298 /* Update the field, and then ring the doorbell */
1299 for (i = 0; i < 16; i++)
1300 writeb(NodeName[i],
1301 &host->cfgtable->ServerName[i]);
1302
1303 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1304
1305 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1306 if (!(readl(host->vaddr + SA5_DOORBELL)
1307 & CFGTBL_ChangeReq))
1308 break;
1309 /* delay and try again */
1310 udelay(1000);
1311 }
1312 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1313 if (i >= MAX_IOCTL_CONFIG_WAIT)
1314 return -EAGAIN;
1315 return 0;
1316 }
1da177e4
LT		 1317
1318 case CCISS_GETHEARTBEAT:
7c832835
BH		 1319 {
1320 Heartbeat_type heartbeat;
1321
1322 if (!arg)
1323 return -EINVAL;
1324 heartbeat = readl(&host->cfgtable->HeartBeat);
1325 if (copy_to_user
1326 (argp, &heartbeat, sizeof(Heartbeat_type)))
1327 return -EFAULT;
1328 return 0;
1329 }
1da177e4 1330 case CCISS_GETBUSTYPES:
7c832835
BH		 1331 {
1332 BusTypes_type BusTypes;
1333
1334 if (!arg)
1335 return -EINVAL;
1336 BusTypes = readl(&host->cfgtable->BusTypes);
1337 if (copy_to_user
1338 (argp, &BusTypes, sizeof(BusTypes_type)))
1339 return -EFAULT;
1340 return 0;
1341 }
1da177e4 1342 case CCISS_GETFIRMVER:
7c832835
BH		 1343 {
1344 FirmwareVer_type firmware;
1da177e4 1345
7c832835
BH		 1346 if (!arg)
1347 return -EINVAL;
1348 memcpy(firmware, host->firm_ver, 4);
1da177e4 1349
7c832835
BH		 1350 if (copy_to_user
1351 (argp, firmware, sizeof(FirmwareVer_type)))
1352 return -EFAULT;
1353 return 0;
1354 }
1355 case CCISS_GETDRIVVER:
1356 {
1357 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1358
7c832835
BH		 1359 if (!arg)
1360 return -EINVAL;
1da177e4 1361
7c832835
BH		 1362 if (copy_to_user
1363 (argp, &DriverVer, sizeof(DriverVer_type)))
1364 return -EFAULT;
1365 return 0;
1366 }
1da177e4 1367
6ae5ce8e
MM		 1368 case CCISS_DEREGDISK:
1369 case CCISS_REGNEWD:
1da177e4 1370 case CCISS_REVALIDVOLS:
2d11d993 1371 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1372
1373 case CCISS_GETLUNINFO:{
1374 LogvolInfo_struct luninfo;
1375
39ccf9a6
SC		 1376 memcpy(&luninfo.LunID, drv->LunID,
1377 sizeof(luninfo.LunID));
7c832835
BH		 1378 luninfo.num_opens = drv->usage_count;
1379 luninfo.num_parts = 0;
1380 if (copy_to_user(argp, &luninfo,
1381 sizeof(LogvolInfo_struct)))
1382 return -EFAULT;
1383 return 0;
1384 }
1da177e4 1385 case CCISS_PASSTHRU:
1da177e4 1386 {
7c832835
BH		 1387 IOCTL_Command_struct iocommand;
1388 CommandList_struct *c;
1389 char *buff = NULL;
1390 u64bit temp64;
6e9a4738 1391 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1392
7c832835
BH		 1393 if (!arg)
1394 return -EINVAL;
1da177e4 1395
7c832835
BH		 1396 if (!capable(CAP_SYS_RAWIO))
1397 return -EPERM;
1da177e4 1398
7c832835
BH		 1399 if (copy_from_user
1400 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1401 return -EFAULT;
1402 if ((iocommand.buf_size < 1) &&
1403 (iocommand.Request.Type.Direction != XFER_NONE)) {
1404 return -EINVAL;
1405 }
1406#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1407 /* Check kmalloc limits */
1408 if (iocommand.buf_size > 128000)
1409 return -EINVAL;
1410#endif
1411 if (iocommand.buf_size > 0) {
1412 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1413 if (buff == NULL)
1414 return -EFAULT;
1415 }
1416 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1417 /* Copy the data into the buffer we created */
1418 if (copy_from_user
1419 (buff, iocommand.buf, iocommand.buf_size)) {
1420 kfree(buff);
1421 return -EFAULT;
1422 }
1423 } else {
1424 memset(buff, 0, iocommand.buf_size);
1425 }
1426 if ((c = cmd_alloc(host, 0)) == NULL) {
1427 kfree(buff);
1428 return -ENOMEM;
1429 }
b028461d 1430 /* Fill in the command type */
7c832835 1431 c->cmd_type = CMD_IOCTL_PEND;
b028461d 1432 /* Fill in Command Header */
1433 c->Header.ReplyQueue = 0; /* unused in simple mode */
1434 if (iocommand.buf_size > 0) /* buffer to fill */
7c832835
BH		 1435 {
1436 c->Header.SGList = 1;
1437 c->Header.SGTotal = 1;
b028461d 1438 } else /* no buffers to fill */
7c832835
BH		 1439 {
1440 c->Header.SGList = 0;
1441 c->Header.SGTotal = 0;
1442 }
1443 c->Header.LUN = iocommand.LUN_info;
b028461d 1444 /* use the kernel address the cmd block for tag */
1445 c->Header.Tag.lower = c->busaddr;
1da177e4 1446
b028461d 1447 /* Fill in Request block */
7c832835 1448 c->Request = iocommand.Request;
1da177e4 1449
b028461d 1450 /* Fill in the scatter gather information */
7c832835
BH		 1451 if (iocommand.buf_size > 0) {
1452 temp64.val = pci_map_single(host->pdev, buff,
1453 iocommand.buf_size,
1454 PCI_DMA_BIDIRECTIONAL);
1455 c->SG[0].Addr.lower = temp64.val32.lower;
1456 c->SG[0].Addr.upper = temp64.val32.upper;
1457 c->SG[0].Len = iocommand.buf_size;
b028461d 1458 c->SG[0].Ext = 0; /* we are not chaining */
7c832835
BH		 1459 }
1460 c->waiting = &wait;
1461
664a717d 1462 enqueue_cmd_and_start_io(host, c);
7c832835
BH		 1463 wait_for_completion(&wait);
1464
1465 /* unlock the buffers from DMA */
1466 temp64.val32.lower = c->SG[0].Addr.lower;
1467 temp64.val32.upper = c->SG[0].Addr.upper;
1468 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1469 iocommand.buf_size,
1470 PCI_DMA_BIDIRECTIONAL);
1471
0a9279cc
MM		 1472 check_ioctl_unit_attention(host, c);
1473
7c832835
BH		 1474 /* Copy the error information out */
1475 iocommand.error_info = *(c->err_info);
1476 if (copy_to_user
1477 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1478 kfree(buff);
1da177e4
LT		 1479 cmd_free(host, c, 0);
1480 return -EFAULT;
1481 }
7c832835
BH		 1482
1483 if (iocommand.Request.Type.Direction == XFER_READ) {
1484 /* Copy the data out of the buffer we created */
1485 if (copy_to_user
1486 (iocommand.buf, buff, iocommand.buf_size)) {
1487 kfree(buff);
1488 cmd_free(host, c, 0);
1489 return -EFAULT;
1490 }
1491 }
1492 kfree(buff);
1493 cmd_free(host, c, 0);
1494 return 0;
1da177e4 1495 }
7c832835
BH		 1496 case CCISS_BIG_PASSTHRU:{
1497 BIG_IOCTL_Command_struct *ioc;
1498 CommandList_struct *c;
1499 unsigned char **buff = NULL;
1500 int *buff_size = NULL;
1501 u64bit temp64;
7c832835
BH		 1502 BYTE sg_used = 0;
1503 int status = 0;
1504 int i;
6e9a4738 1505 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1506 __u32 left;
1507 __u32 sz;
1508 BYTE __user *data_ptr;
1509
1510 if (!arg)
1511 return -EINVAL;
1512 if (!capable(CAP_SYS_RAWIO))
1513 return -EPERM;
1514 ioc = (BIG_IOCTL_Command_struct *)
1515 kmalloc(sizeof(*ioc), GFP_KERNEL);
1516 if (!ioc) {
1517 status = -ENOMEM;
1518 goto cleanup1;
1519 }
1520 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1521 status = -EFAULT;
1522 goto cleanup1;
1523 }
1524 if ((ioc->buf_size < 1) &&
1525 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1526 status = -EINVAL;
1527 goto cleanup1;
7c832835
BH		 1528 }
1529 /* Check kmalloc limits using all SGs */
1530 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1531 status = -EINVAL;
1532 goto cleanup1;
1533 }
1534 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1535 status = -EINVAL;
1536 goto cleanup1;
1537 }
1538 buff =
1539 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1540 if (!buff) {
1da177e4
LT		 1541 status = -ENOMEM;
1542 goto cleanup1;
1543 }
5cbded58 1544 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1545 GFP_KERNEL);
1546 if (!buff_size) {
1547 status = -ENOMEM;
1548 goto cleanup1;
1549 }
1550 left = ioc->buf_size;
1551 data_ptr = ioc->buf;
1552 while (left) {
1553 sz = (left >
1554 ioc->malloc_size) ? ioc->
1555 malloc_size : left;
1556 buff_size[sg_used] = sz;
1557 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1558 if (buff[sg_used] == NULL) {
1da177e4 1559 status = -ENOMEM;
15534d38
JA		 1560 goto cleanup1;
1561 }
7c832835
BH		 1562 if (ioc->Request.Type.Direction == XFER_WRITE) {
1563 if (copy_from_user
1564 (buff[sg_used], data_ptr, sz)) {
f7108f91 1565 status = -EFAULT;
7c832835
BH		 1566 goto cleanup1;
1567 }
1568 } else {
1569 memset(buff[sg_used], 0, sz);
1570 }
1571 left -= sz;
1572 data_ptr += sz;
1573 sg_used++;
1574 }
1575 if ((c = cmd_alloc(host, 0)) == NULL) {
1576 status = -ENOMEM;
1577 goto cleanup1;
1578 }
1579 c->cmd_type = CMD_IOCTL_PEND;
1580 c->Header.ReplyQueue = 0;
1581
1582 if (ioc->buf_size > 0) {
1583 c->Header.SGList = sg_used;
1584 c->Header.SGTotal = sg_used;
1da177e4 1585 } else {
7c832835
BH		 1586 c->Header.SGList = 0;
1587 c->Header.SGTotal = 0;
1da177e4 1588 }
7c832835
BH		 1589 c->Header.LUN = ioc->LUN_info;
1590 c->Header.Tag.lower = c->busaddr;
1591
1592 c->Request = ioc->Request;
1593 if (ioc->buf_size > 0) {
7c832835
BH		 1594 for (i = 0; i < sg_used; i++) {
1595 temp64.val =
1596 pci_map_single(host->pdev, buff[i],
1597 buff_size[i],
1598 PCI_DMA_BIDIRECTIONAL);
1599 c->SG[i].Addr.lower =
1600 temp64.val32.lower;
1601 c->SG[i].Addr.upper =
1602 temp64.val32.upper;
1603 c->SG[i].Len = buff_size[i];
1604 c->SG[i].Ext = 0; /* we are not chaining */
1605 }
1606 }
1607 c->waiting = &wait;
664a717d 1608 enqueue_cmd_and_start_io(host, c);
7c832835
BH		 1609 wait_for_completion(&wait);
1610 /* unlock the buffers from DMA */
1611 for (i = 0; i < sg_used; i++) {
1612 temp64.val32.lower = c->SG[i].Addr.lower;
1613 temp64.val32.upper = c->SG[i].Addr.upper;
1614 pci_unmap_single(host->pdev,
1615 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1616 PCI_DMA_BIDIRECTIONAL);
1da177e4 1617 }
0a9279cc 1618 check_ioctl_unit_attention(host, c);
7c832835
BH		 1619 /* Copy the error information out */
1620 ioc->error_info = *(c->err_info);
1621 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1622 cmd_free(host, c, 0);
1623 status = -EFAULT;
1624 goto cleanup1;
1625 }
1626 if (ioc->Request.Type.Direction == XFER_READ) {
1627 /* Copy the data out of the buffer we created */
1628 BYTE __user *ptr = ioc->buf;
1629 for (i = 0; i < sg_used; i++) {
1630 if (copy_to_user
1631 (ptr, buff[i], buff_size[i])) {
1632 cmd_free(host, c, 0);
1633 status = -EFAULT;
1634 goto cleanup1;
1635 }
1636 ptr += buff_size[i];
1da177e4 1637 }
1da177e4 1638 }
7c832835
BH		 1639 cmd_free(host, c, 0);
1640 status = 0;
1641 cleanup1:
1642 if (buff) {
1643 for (i = 0; i < sg_used; i++)
1644 kfree(buff[i]);
1645 kfree(buff);
1646 }
1647 kfree(buff_size);
1648 kfree(ioc);
1649 return status;
1da177e4 1650 }
03bbfee5
MMOD		 1651
1652 /* scsi_cmd_ioctl handles these, below, though some are not */
1653 /* very meaningful for cciss. SG_IO is the main one people want. */
1654
1655 case SG_GET_VERSION_NUM:
1656 case SG_SET_TIMEOUT:
1657 case SG_GET_TIMEOUT:
1658 case SG_GET_RESERVED_SIZE:
1659 case SG_SET_RESERVED_SIZE:
1660 case SG_EMULATED_HOST:
1661 case SG_IO:
1662 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1663 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1664
1665 /* scsi_cmd_ioctl would normally handle these, below, but */
1666 /* they aren't a good fit for cciss, as CD-ROMs are */
1667 /* not supported, and we don't have any bus/target/lun */
1668 /* which we present to the kernel. */
1669
1670 case CDROM_SEND_PACKET:
1671 case CDROMCLOSETRAY:
1672 case CDROMEJECT:
1673 case SCSI_IOCTL_GET_IDLUN:
1674 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1675 default:
1676 return -ENOTTY;
1677 }
1da177e4
LT		 1678}
1679
7b30f092
JA		 1680static void cciss_check_queues(ctlr_info_t *h)
1681{
1682 int start_queue = h->next_to_run;
1683 int i;
1684
1685 /* check to see if we have maxed out the number of commands that can
1686 * be placed on the queue. If so then exit. We do this check here
1687 * in case the interrupt we serviced was from an ioctl and did not
1688 * free any new commands.
1689 */
f880632f 1690 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1691 return;
1692
1693 /* We have room on the queue for more commands. Now we need to queue
1694 * them up. We will also keep track of the next queue to run so
1695 * that every queue gets a chance to be started first.
1696 */
1697 for (i = 0; i < h->highest_lun + 1; i++) {
1698 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1699 /* make sure the disk has been added and the drive is real
1700 * because this can be called from the middle of init_one.
1701 */
9cef0d2f
SC		 1702 if (!h->drv[curr_queue])
1703 continue;
1704 if (!(h->drv[curr_queue]->queue) ||
1705 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1706 continue;
1707 blk_start_queue(h->gendisk[curr_queue]->queue);
1708
1709 /* check to see if we have maxed out the number of commands
1710 * that can be placed on the queue.
1711 */
f880632f 1712 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1713 if (curr_queue == start_queue) {
1714 h->next_to_run =
1715 (start_queue + 1) % (h->highest_lun + 1);
1716 break;
1717 } else {
1718 h->next_to_run = curr_queue;
1719 break;
1720 }
7b30f092
JA		 1721 }
1722 }
1723}
1724
ca1e0484
MM		 1725static void cciss_softirq_done(struct request *rq)
1726{
1727 CommandList_struct *cmd = rq->completion_data;
1728 ctlr_info_t *h = hba[cmd->ctlr];
5c07a311 1729 SGDescriptor_struct *curr_sg = cmd->SG;
ca1e0484 1730 u64bit temp64;
664a717d 1731 unsigned long flags;
ca1e0484 1732 int i, ddir;
5c07a311 1733 int sg_index = 0;
ca1e0484
MM		 1734
1735 if (cmd->Request.Type.Direction == XFER_READ)
1736 ddir = PCI_DMA_FROMDEVICE;
1737 else
1738 ddir = PCI_DMA_TODEVICE;
1739
1740 /* command did not need to be retried */
1741 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1742 for (i = 0; i < cmd->Header.SGList; i++) {
5c07a311 1743 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
d45033ef 1744 cciss_unmap_sg_chain_block(h, cmd);
5c07a311 1745 /* Point to the next block */
dccc9b56 1746 curr_sg = h->cmd_sg_list[cmd->cmdindex];
5c07a311
DB		 1747 sg_index = 0;
1748 }
1749 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1750 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1751 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1752 ddir);
1753 ++sg_index;
ca1e0484
MM		 1754 }
1755
ca1e0484
MM		 1756#ifdef CCISS_DEBUG
1757 printk("Done with %p\n", rq);
7c832835 1758#endif /* CCISS_DEBUG */
ca1e0484 1759
c3a4d78c 1760 /* set the residual count for pc requests */
ac44e5b2 1761 if (blk_pc_request(rq))
c3a4d78c 1762 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1763
c3a4d78c 1764 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1765
ca1e0484 1766 spin_lock_irqsave(&h->lock, flags);
7c832835 1767 cmd_free(h, cmd, 1);
7b30f092 1768 cciss_check_queues(h);
ca1e0484
MM		 1769 spin_unlock_irqrestore(&h->lock, flags);
1770}
1771
39ccf9a6
SC		 1772static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1773 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1774{
9cef0d2f
SC		 1775 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1776 sizeof(h->drv[log_unit]->LunID));
b57695fe 1777}
1778
7fe06326
AP		 1779/* This function gets the SCSI vendor, model, and revision of a logical drive
1780 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1781 * they cannot be read.
1782 */
7b838bde 1783static void cciss_get_device_descr(int ctlr, int logvol,
7fe06326
AP		 1784 char *vendor, char *model, char *rev)
1785{
1786 int rc;
1787 InquiryData_struct *inq_buf;
b57695fe 1788 unsigned char scsi3addr[8];
7fe06326
AP		 1789
1790 *vendor = '\0';
1791 *model = '\0';
1792 *rev = '\0';
1793
1794 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1795 if (!inq_buf)
1796 return;
1797
b57695fe 1798 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1799 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1800 scsi3addr, TYPE_CMD);
7fe06326
AP		 1801 if (rc == IO_OK) {
1802 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1803 vendor[VENDOR_LEN] = '\0';
1804 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1805 model[MODEL_LEN] = '\0';
1806 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1807 rev[REV_LEN] = '\0';
1808 }
1809
1810 kfree(inq_buf);
1811 return;
1812}
1813
a72da29b
MM		 1814/* This function gets the serial number of a logical drive via
1815 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1816 * number cannot be had, for whatever reason, 16 bytes of 0xff
1817 * are returned instead.
1818 */
7b838bde 1819static void cciss_get_serial_no(int ctlr, int logvol,
a72da29b
MM		 1820 unsigned char *serial_no, int buflen)
1821{
1822#define PAGE_83_INQ_BYTES 64
1823 int rc;
1824 unsigned char *buf;
b57695fe 1825 unsigned char scsi3addr[8];
a72da29b
MM		 1826
1827 if (buflen > 16)
1828 buflen = 16;
1829 memset(serial_no, 0xff, buflen);
1830 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1831 if (!buf)
1832 return;
1833 memset(serial_no, 0, buflen);
b57695fe 1834 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1835 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1836 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1837 if (rc == IO_OK)
1838 memcpy(serial_no, &buf[8], buflen);
1839 kfree(buf);
1840 return;
1841}
1842
617e1344
SC		 1843/*
1844 * cciss_add_disk sets up the block device queue for a logical drive
1845 */
1846static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1847 int drv_index)
1848{
1849 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1850 if (!disk->queue)
1851 goto init_queue_failure;
6ae5ce8e
MM		 1852 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1853 disk->major = h->major;
1854 disk->first_minor = drv_index << NWD_SHIFT;
1855 disk->fops = &cciss_fops;
9cef0d2f
SC		 1856 if (cciss_create_ld_sysfs_entry(h, drv_index))
1857 goto cleanup_queue;
1858 disk->private_data = h->drv[drv_index];
1859 disk->driverfs_dev = &h->drv[drv_index]->dev;
6ae5ce8e
MM		 1860
1861 /* Set up queue information */
1862 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1863
1864 /* This is a hardware imposed limit. */
8a78362c 1865 blk_queue_max_segments(disk->queue, h->maxsgentries);
6ae5ce8e 1866
086fa5ff 1867 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
6ae5ce8e
MM		 1868
1869 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1870
1871 disk->queue->queuedata = h;
1872
e1defc4f 1873 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1874 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1875
1876 /* Make sure all queue data is written out before */
9cef0d2f 1877 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1878 /* allows the interrupt handler to start the queue */
1879 wmb();
9cef0d2f 1880 h->drv[drv_index]->queue = disk->queue;
6ae5ce8e 1881 add_disk(disk);
617e1344
SC		 1882 return 0;
1883
1884cleanup_queue:
1885 blk_cleanup_queue(disk->queue);
1886 disk->queue = NULL;
e8074f79 1887init_queue_failure:
617e1344 1888 return -1;
6ae5ce8e
MM		 1889}
1890
ddd47442 1891/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1892 * If the usage_count is zero and it is a heretofore unknown drive, or,
1893 * the drive's capacity, geometry, or serial number has changed,
1894 * then the drive information will be updated and the disk will be
1895 * re-registered with the kernel. If these conditions don't hold,
1896 * then it will be left alone for the next reboot. The exception to this
1897 * is disk 0 which will always be left registered with the kernel since it
1898 * is also the controller node. Any changes to disk 0 will show up on
1899 * the next reboot.
7c832835 1900 */
2d11d993
SC		 1901static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1902 int via_ioctl)
7c832835 1903{
ddd47442
MM		 1904 ctlr_info_t *h = hba[ctlr];
1905 struct gendisk *disk;
ddd47442
MM		 1906 InquiryData_struct *inq_buff = NULL;
1907 unsigned int block_size;
00988a35 1908 sector_t total_size;
ddd47442
MM		 1909 unsigned long flags = 0;
1910 int ret = 0;
a72da29b
MM		 1911 drive_info_struct *drvinfo;
1912
1913 /* Get information about the disk and modify the driver structure */
1914 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1915 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 1916 if (inq_buff == NULL || drvinfo == NULL)
1917 goto mem_msg;
1918
1919 /* testing to see if 16-byte CDBs are already being used */
1920 if (h->cciss_read == CCISS_READ_16) {
7b838bde 1921 cciss_read_capacity_16(h->ctlr, drv_index,
a72da29b
MM		 1922 &total_size, &block_size);
1923
1924 } else {
7b838bde 1925 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
a72da29b
MM		 1926 /* if read_capacity returns all F's this volume is >2TB */
1927 /* in size so we switch to 16-byte CDB's for all */
1928 /* read/write ops */
1929 if (total_size == 0xFFFFFFFFULL) {
7b838bde 1930 cciss_read_capacity_16(ctlr, drv_index,
a72da29b
MM		 1931 &total_size, &block_size);
1932 h->cciss_read = CCISS_READ_16;
1933 h->cciss_write = CCISS_WRITE_16;
1934 } else {
1935 h->cciss_read = CCISS_READ_10;
1936 h->cciss_write = CCISS_WRITE_10;
1937 }
1938 }
1939
7b838bde 1940 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
a72da29b
MM		 1941 inq_buff, drvinfo);
1942 drvinfo->block_size = block_size;
1943 drvinfo->nr_blocks = total_size + 1;
1944
7b838bde 1945 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
7fe06326 1946 drvinfo->model, drvinfo->rev);
7b838bde 1947 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
a72da29b 1948 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 1949 /* Save the lunid in case we deregister the disk, below. */
1950 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1951 sizeof(drvinfo->LunID));
a72da29b
MM		 1952
1953 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 1954 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 1955 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 1956 h->drv[drv_index]->serial_no, 16) == 0) &&
1957 drvinfo->block_size == h->drv[drv_index]->block_size &&
1958 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1959 drvinfo->heads == h->drv[drv_index]->heads &&
1960 drvinfo->sectors == h->drv[drv_index]->sectors &&
1961 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 1962 /* The disk is unchanged, nothing to update */
1963 goto freeret;
a72da29b 1964
6ae5ce8e
MM		 1965 /* If we get here it's not the same disk, or something's changed,
1966 * so we need to * deregister it, and re-register it, if it's not
1967 * in use.
1968 * If the disk already exists then deregister it before proceeding
1969 * (unless it's the first disk (for the controller node).
1970 */
9cef0d2f 1971 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 1972 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442 1973 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 1974 h->drv[drv_index]->busy_configuring = 1;
ddd47442 1975 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1976
9cef0d2f 1977 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 1978 * which keeps the interrupt handler from starting
1979 * the queue.
1980 */
2d11d993 1981 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1982 }
1983
1984 /* If the disk is in use return */
1985 if (ret)
a72da29b
MM		 1986 goto freeret;
1987
6ae5ce8e 1988 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 1989 * and serial number inquiry. If the disk was deregistered
1990 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 1991 */
9cef0d2f
SC		 1992 if (h->drv[drv_index] == NULL) {
1993 drvinfo->device_initialized = 0;
1994 h->drv[drv_index] = drvinfo;
1995 drvinfo = NULL; /* so it won't be freed below. */
1996 } else {
1997 /* special case for cxd0 */
1998 h->drv[drv_index]->block_size = drvinfo->block_size;
1999 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2000 h->drv[drv_index]->heads = drvinfo->heads;
2001 h->drv[drv_index]->sectors = drvinfo->sectors;
2002 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2003 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2004 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2005 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2006 VENDOR_LEN + 1);
2007 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2008 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2009 }
ddd47442
MM		 2010
2011 ++h->num_luns;
2012 disk = h->gendisk[drv_index];
9cef0d2f 2013 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 2014
6ae5ce8e
MM		 2015 /* If it's not disk 0 (drv_index != 0)
2016 * or if it was disk 0, but there was previously
2017 * no actual corresponding configured logical drive
2018 * (raid_leve == -1) then we want to update the
2019 * logical drive's information.
2020 */
361e9b07
SC		 2021 if (drv_index || first_time) {
2022 if (cciss_add_disk(h, disk, drv_index) != 0) {
2023 cciss_free_gendisk(h, drv_index);
9cef0d2f 2024 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2025 printk(KERN_WARNING "cciss:%d could not update "
2026 "disk %d\n", h->ctlr, drv_index);
2027 --h->num_luns;
2028 }
2029 }
ddd47442 2030
6ae5ce8e 2031freeret:
ddd47442 2032 kfree(inq_buff);
a72da29b 2033 kfree(drvinfo);
ddd47442 2034 return;
6ae5ce8e 2035mem_msg:
ddd47442
MM		 2036 printk(KERN_ERR "cciss: out of memory\n");
2037 goto freeret;
2038}
2039
2040/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 2041 * that has a null drv pointer and allocate the drive info struct and
2042 * will return that index This is where new drives will be added.
2043 * If the index to be returned is greater than the highest_lun index for
2044 * the controller then highest_lun is set * to this new index.
2045 * If there are no available indexes or if tha allocation fails, then -1
2046 * is returned. * "controller_node" is used to know if this is a real
2047 * logical drive, or just the controller node, which determines if this
2048 * counts towards highest_lun.
7c832835 2049 */
9cef0d2f 2050static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 2051{
2052 int i;
9cef0d2f 2053 drive_info_struct *drv;
ddd47442 2054
9cef0d2f 2055 /* Search for an empty slot for our drive info */
7c832835 2056 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 2057
2058 /* if not cxd0 case, and it's occupied, skip it. */
2059 if (h->drv[i] && i != 0)
2060 continue;
2061 /*
2062 * If it's cxd0 case, and drv is alloc'ed already, and a
2063 * disk is configured there, skip it.
2064 */
2065 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2066 continue;
2067
2068 /*
2069 * We've found an empty slot. Update highest_lun
2070 * provided this isn't just the fake cxd0 controller node.
2071 */
2072 if (i > h->highest_lun && !controller_node)
2073 h->highest_lun = i;
2074
2075 /* If adding a real disk at cxd0, and it's already alloc'ed */
2076 if (i == 0 && h->drv[i] != NULL)
ddd47442 2077 return i;
9cef0d2f
SC		 2078
2079 /*
2080 * Found an empty slot, not already alloc'ed. Allocate it.
2081 * Mark it with raid_level == -1, so we know it's new later on.
2082 */
2083 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2084 if (!drv)
2085 return -1;
2086 drv->raid_level = -1; /* so we know it's new */
2087 h->drv[i] = drv;
2088 return i;
ddd47442
MM		 2089 }
2090 return -1;
2091}
2092
9cef0d2f
SC		 2093static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2094{
2095 kfree(h->drv[drv_index]);
2096 h->drv[drv_index] = NULL;
2097}
2098
361e9b07
SC		 2099static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2100{
2101 put_disk(h->gendisk[drv_index]);
2102 h->gendisk[drv_index] = NULL;
2103}
2104
6ae5ce8e
MM		 2105/* cciss_add_gendisk finds a free hba[]->drv structure
2106 * and allocates a gendisk if needed, and sets the lunid
2107 * in the drvinfo structure. It returns the index into
2108 * the ->drv[] array, or -1 if none are free.
2109 * is_controller_node indicates whether highest_lun should
2110 * count this disk, or if it's only being added to provide
2111 * a means to talk to the controller in case no logical
2112 * drives have yet been configured.
2113 */
39ccf9a6
SC		 2114static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2115 int controller_node)
6ae5ce8e
MM		 2116{
2117 int drv_index;
2118
9cef0d2f 2119 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2120 if (drv_index == -1)
2121 return -1;
8ce51966 2122
6ae5ce8e
MM		 2123 /*Check if the gendisk needs to be allocated */
2124 if (!h->gendisk[drv_index]) {
2125 h->gendisk[drv_index] =
2126 alloc_disk(1 << NWD_SHIFT);
2127 if (!h->gendisk[drv_index]) {
2128 printk(KERN_ERR "cciss%d: could not "
2129 "allocate a new disk %d\n",
2130 h->ctlr, drv_index);
9cef0d2f 2131 goto err_free_drive_info;
6ae5ce8e
MM		 2132 }
2133 }
9cef0d2f
SC		 2134 memcpy(h->drv[drv_index]->LunID, lunid,
2135 sizeof(h->drv[drv_index]->LunID));
2136 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2137 goto err_free_disk;
6ae5ce8e
MM		 2138 /* Don't need to mark this busy because nobody */
2139 /* else knows about this disk yet to contend */
2140 /* for access to it. */
9cef0d2f 2141 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2142 wmb();
2143 return drv_index;
7fe06326
AP		 2144
2145err_free_disk:
361e9b07 2146 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2147err_free_drive_info:
2148 cciss_free_drive_info(h, drv_index);
7fe06326 2149 return -1;
6ae5ce8e
MM		 2150}
2151
2152/* This is for the special case of a controller which
2153 * has no logical drives. In this case, we still need
2154 * to register a disk so the controller can be accessed
2155 * by the Array Config Utility.
2156 */
2157static void cciss_add_controller_node(ctlr_info_t *h)
2158{
2159 struct gendisk *disk;
2160 int drv_index;
2161
2162 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2163 return;
2164
39ccf9a6 2165 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2166 if (drv_index == -1)
2167 goto error;
9cef0d2f
SC		 2168 h->drv[drv_index]->block_size = 512;
2169 h->drv[drv_index]->nr_blocks = 0;
2170 h->drv[drv_index]->heads = 0;
2171 h->drv[drv_index]->sectors = 0;
2172 h->drv[drv_index]->cylinders = 0;
2173 h->drv[drv_index]->raid_level = -1;
2174 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2175 disk = h->gendisk[drv_index];
361e9b07
SC		 2176 if (cciss_add_disk(h, disk, drv_index) == 0)
2177 return;
2178 cciss_free_gendisk(h, drv_index);
9cef0d2f 2179 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2180error:
2181 printk(KERN_WARNING "cciss%d: could not "
2182 "add disk 0.\n", h->ctlr);
2183 return;
6ae5ce8e
MM		 2184}
2185
ddd47442 2186/* This function will add and remove logical drives from the Logical
d14c4ab5 2187 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2188 * so that mount points are preserved until the next reboot. This allows
2189 * for the removal of logical drives in the middle of the drive array
2190 * without a re-ordering of those drives.
2191 * INPUT
2192 * h = The controller to perform the operations on
7c832835 2193 */
2d11d993
SC		 2194static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2195 int via_ioctl)
1da177e4 2196{
ddd47442
MM		 2197 int ctlr = h->ctlr;
2198 int num_luns;
2199 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2200 int return_code;
2201 int listlength = 0;
2202 int i;
2203 int drv_found;
2204 int drv_index = 0;
39ccf9a6 2205 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2206 unsigned long flags;
ddd47442 2207
6ae5ce8e
MM		 2208 if (!capable(CAP_SYS_RAWIO))
2209 return -EPERM;
2210
ddd47442
MM		 2211 /* Set busy_configuring flag for this operation */
2212 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2213 if (h->busy_configuring) {
ddd47442
MM		 2214 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2215 return -EBUSY;
2216 }
2217 h->busy_configuring = 1;
a72da29b 2218 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2219
a72da29b
MM		 2220 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2221 if (ld_buff == NULL)
2222 goto mem_msg;
2223
2224 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2225 sizeof(ReportLunData_struct),
2226 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2227
a72da29b
MM		 2228 if (return_code == IO_OK)
2229 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2230 else { /* reading number of logical volumes failed */
2231 printk(KERN_WARNING "cciss: report logical volume"
2232 " command failed\n");
2233 listlength = 0;
2234 goto freeret;
2235 }
2236
2237 num_luns = listlength / 8; /* 8 bytes per entry */
2238 if (num_luns > CISS_MAX_LUN) {
2239 num_luns = CISS_MAX_LUN;
2240 printk(KERN_WARNING "cciss: more luns configured"
2241 " on controller than can be handled by"
2242 " this driver.\n");
2243 }
2244
6ae5ce8e
MM		 2245 if (num_luns == 0)
2246 cciss_add_controller_node(h);
2247
2248 /* Compare controller drive array to driver's drive array
2249 * to see if any drives are missing on the controller due
2250 * to action of Array Config Utility (user deletes drive)
2251 * and deregister logical drives which have disappeared.
2252 */
a72da29b
MM		 2253 for (i = 0; i <= h->highest_lun; i++) {
2254 int j;
2255 drv_found = 0;
d8a0be6a
SC		 2256
2257 /* skip holes in the array from already deleted drives */
9cef0d2f 2258 if (h->drv[i] == NULL)
d8a0be6a
SC		 2259 continue;
2260
a72da29b 2261 for (j = 0; j < num_luns; j++) {
39ccf9a6 2262 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2263 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2264 sizeof(lunid)) == 0) {
a72da29b
MM		 2265 drv_found = 1;
2266 break;
2267 }
2268 }
2269 if (!drv_found) {
2270 /* Deregister it from the OS, it's gone. */
2271 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2272 h->drv[i]->busy_configuring = 1;
a72da29b 2273 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2274 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2275 if (h->drv[i] != NULL)
2276 h->drv[i]->busy_configuring = 0;
ddd47442 2277 }
a72da29b 2278 }
ddd47442 2279
a72da29b
MM		 2280 /* Compare controller drive array to driver's drive array.
2281 * Check for updates in the drive information and any new drives
2282 * on the controller due to ACU adding logical drives, or changing
2283 * a logical drive's size, etc. Reregister any new/changed drives
2284 */
2285 for (i = 0; i < num_luns; i++) {
2286 int j;
ddd47442 2287
a72da29b 2288 drv_found = 0;
ddd47442 2289
39ccf9a6 2290 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2291 /* Find if the LUN is already in the drive array
2292 * of the driver. If so then update its info
2293 * if not in use. If it does not exist then find
2294 * the first free index and add it.
2295 */
2296 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2297 if (h->drv[j] != NULL &&
2298 memcmp(h->drv[j]->LunID, lunid,
2299 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2300 drv_index = j;
2301 drv_found = 1;
2302 break;
ddd47442 2303 }
a72da29b 2304 }
ddd47442 2305
a72da29b
MM		 2306 /* check if the drive was found already in the array */
2307 if (!drv_found) {
eece695f 2308 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2309 if (drv_index == -1)
2310 goto freeret;
a72da29b 2311 }
2d11d993
SC		 2312 cciss_update_drive_info(ctlr, drv_index, first_time,
2313 via_ioctl);
a72da29b 2314 } /* end for */
ddd47442 2315
6ae5ce8e 2316freeret:
ddd47442
MM		 2317 kfree(ld_buff);
2318 h->busy_configuring = 0;
2319 /* We return -1 here to tell the ACU that we have registered/updated
2320 * all of the drives that we can and to keep it from calling us
2321 * additional times.
7c832835 2322 */
ddd47442 2323 return -1;
6ae5ce8e 2324mem_msg:
ddd47442 2325 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2326 h->busy_configuring = 0;
ddd47442
MM		 2327 goto freeret;
2328}
2329
9ddb27b4
SC		 2330static void cciss_clear_drive_info(drive_info_struct *drive_info)
2331{
2332 /* zero out the disk size info */
2333 drive_info->nr_blocks = 0;
2334 drive_info->block_size = 0;
2335 drive_info->heads = 0;
2336 drive_info->sectors = 0;
2337 drive_info->cylinders = 0;
2338 drive_info->raid_level = -1;
2339 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2340 memset(drive_info->model, 0, sizeof(drive_info->model));
2341 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2342 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2343 /*
2344 * don't clear the LUNID though, we need to remember which
2345 * one this one is.
2346 */
2347}
2348
ddd47442
MM		 2349/* This function will deregister the disk and it's queue from the
2350 * kernel. It must be called with the controller lock held and the
2351 * drv structures busy_configuring flag set. It's parameters are:
2352 *
2353 * disk = This is the disk to be deregistered
2354 * drv = This is the drive_info_struct associated with the disk to be
2355 * deregistered. It contains information about the disk used
2356 * by the driver.
2357 * clear_all = This flag determines whether or not the disk information
2358 * is going to be completely cleared out and the highest_lun
2359 * reset. Sometimes we want to clear out information about
d14c4ab5 2360 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2361 * the highest_lun should be left unchanged and the LunID
2362 * should not be cleared.
2d11d993
SC		 2363 * via_ioctl
2364 * This indicates whether we've reached this path via ioctl.
2365 * This affects the maximum usage count allowed for c0d0 to be messed with.
2366 * If this path is reached via ioctl(), then the max_usage_count will
2367 * be 1, as the process calling ioctl() has got to have the device open.
2368 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2369*/
a0ea8622 2370static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2371 int clear_all, int via_ioctl)
ddd47442 2372{
799202cb 2373 int i;
a0ea8622
SC		 2374 struct gendisk *disk;
2375 drive_info_struct *drv;
9cef0d2f 2376 int recalculate_highest_lun;
1da177e4
LT		 2377
2378 if (!capable(CAP_SYS_RAWIO))
2379 return -EPERM;
2380
9cef0d2f 2381 drv = h->drv[drv_index];
a0ea8622
SC		 2382 disk = h->gendisk[drv_index];
2383
1da177e4 2384 /* make sure logical volume is NOT is use */
7c832835 2385 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2386 if (drv->usage_count > via_ioctl)
7c832835
BH		 2387 return -EBUSY;
2388 } else if (drv->usage_count > 0)
2389 return -EBUSY;
1da177e4 2390
9cef0d2f
SC		 2391 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2392
ddd47442
MM		 2393 /* invalidate the devices and deregister the disk. If it is disk
2394 * zero do not deregister it but just zero out it's values. This
2395 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2396 */
2397 if (h->gendisk[0] != disk) {
5a9df732 2398 struct request_queue *q = disk->queue;
097d0264 2399 if (disk->flags & GENHD_FL_UP) {
8ce51966 2400 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2401 del_gendisk(disk);
5a9df732 2402 }
9cef0d2f 2403 if (q)
5a9df732 2404 blk_cleanup_queue(q);
5a9df732
AB		 2405 /* If clear_all is set then we are deleting the logical
2406 * drive, not just refreshing its info. For drives
2407 * other than disk 0 we will call put_disk. We do not
2408 * do this for disk 0 as we need it to be able to
2409 * configure the controller.
a72da29b 2410 */
5a9df732
AB		 2411 if (clear_all){
2412 /* This isn't pretty, but we need to find the
2413 * disk in our array and NULL our the pointer.
2414 * This is so that we will call alloc_disk if
2415 * this index is used again later.
a72da29b 2416 */
5a9df732 2417 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2418 if (h->gendisk[i] == disk) {
5a9df732
AB		 2419 h->gendisk[i] = NULL;
2420 break;
799202cb 2421 }
799202cb 2422 }
5a9df732 2423 put_disk(disk);
ddd47442 2424 }
799202cb
MM		 2425 } else {
2426 set_capacity(disk, 0);
9cef0d2f 2427 cciss_clear_drive_info(drv);
ddd47442
MM		 2428 }
2429
2430 --h->num_luns;
ddd47442 2431
9cef0d2f
SC		 2432 /* if it was the last disk, find the new hightest lun */
2433 if (clear_all && recalculate_highest_lun) {
c2d45b4d 2434 int newhighest = -1;
9cef0d2f
SC		 2435 for (i = 0; i <= h->highest_lun; i++) {
2436 /* if the disk has size > 0, it is available */
2437 if (h->drv[i] && h->drv[i]->heads)
2438 newhighest = i;
1da177e4 2439 }
9cef0d2f 2440 h->highest_lun = newhighest;
ddd47442 2441 }
e2019b58 2442 return 0;
1da177e4 2443}
ddd47442 2444
b57695fe 2445static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2446 size_t size, __u8 page_code, unsigned char *scsi3addr,
2447 int cmd_type)
1da177e4 2448{
7c832835 2449 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2450 u64bit buff_dma_handle;
2451 int status = IO_OK;
2452
2453 c->cmd_type = CMD_IOCTL_PEND;
2454 c->Header.ReplyQueue = 0;
7c832835 2455 if (buff != NULL) {
1da177e4 2456 c->Header.SGList = 1;
7c832835 2457 c->Header.SGTotal = 1;
1da177e4
LT		 2458 } else {
2459 c->Header.SGList = 0;
7c832835 2460 c->Header.SGTotal = 0;
1da177e4
LT		 2461 }
2462 c->Header.Tag.lower = c->busaddr;
b57695fe 2463 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2464
2465 c->Request.Type.Type = cmd_type;
2466 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2467 switch (cmd) {
2468 case CISS_INQUIRY:
1da177e4 2469 /* are we trying to read a vital product page */
7c832835 2470 if (page_code != 0) {
1da177e4
LT		 2471 c->Request.CDB[1] = 0x01;
2472 c->Request.CDB[2] = page_code;
2473 }
2474 c->Request.CDBLen = 6;
7c832835 2475 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2476 c->Request.Type.Direction = XFER_READ;
2477 c->Request.Timeout = 0;
7c832835
BH		 2478 c->Request.CDB[0] = CISS_INQUIRY;
2479 c->Request.CDB[4] = size & 0xFF;
2480 break;
1da177e4
LT		 2481 case CISS_REPORT_LOG:
2482 case CISS_REPORT_PHYS:
7c832835 2483 /* Talking to controller so It's a physical command
1da177e4 2484 mode = 00 target = 0. Nothing to write.
7c832835 2485 */
1da177e4
LT		 2486 c->Request.CDBLen = 12;
2487 c->Request.Type.Attribute = ATTR_SIMPLE;
2488 c->Request.Type.Direction = XFER_READ;
2489 c->Request.Timeout = 0;
2490 c->Request.CDB[0] = cmd;
b028461d 2491 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
1da177e4
LT		 2492 c->Request.CDB[7] = (size >> 16) & 0xFF;
2493 c->Request.CDB[8] = (size >> 8) & 0xFF;
2494 c->Request.CDB[9] = size & 0xFF;
2495 break;
2496
2497 case CCISS_READ_CAPACITY:
1da177e4
LT		 2498 c->Request.CDBLen = 10;
2499 c->Request.Type.Attribute = ATTR_SIMPLE;
2500 c->Request.Type.Direction = XFER_READ;
2501 c->Request.Timeout = 0;
2502 c->Request.CDB[0] = cmd;
7c832835 2503 break;
00988a35 2504 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2505 c->Request.CDBLen = 16;
2506 c->Request.Type.Attribute = ATTR_SIMPLE;
2507 c->Request.Type.Direction = XFER_READ;
2508 c->Request.Timeout = 0;
2509 c->Request.CDB[0] = cmd;
2510 c->Request.CDB[1] = 0x10;
2511 c->Request.CDB[10] = (size >> 24) & 0xFF;
2512 c->Request.CDB[11] = (size >> 16) & 0xFF;
2513 c->Request.CDB[12] = (size >> 8) & 0xFF;
2514 c->Request.CDB[13] = size & 0xFF;
2515 c->Request.Timeout = 0;
2516 c->Request.CDB[0] = cmd;
2517 break;
1da177e4
LT		 2518 case CCISS_CACHE_FLUSH:
2519 c->Request.CDBLen = 12;
2520 c->Request.Type.Attribute = ATTR_SIMPLE;
2521 c->Request.Type.Direction = XFER_WRITE;
2522 c->Request.Timeout = 0;
2523 c->Request.CDB[0] = BMIC_WRITE;
2524 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2525 break;
88f627ae 2526 case TEST_UNIT_READY:
88f627ae
SC		 2527 c->Request.CDBLen = 6;
2528 c->Request.Type.Attribute = ATTR_SIMPLE;
2529 c->Request.Type.Direction = XFER_NONE;
2530 c->Request.Timeout = 0;
2531 break;
1da177e4
LT		 2532 default:
2533 printk(KERN_WARNING
7c832835 2534 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2535 return IO_ERROR;
1da177e4
LT		 2536 }
2537 } else if (cmd_type == TYPE_MSG) {
2538 switch (cmd) {
7c832835 2539 case 0: /* ABORT message */
3da8b713 2540 c->Request.CDBLen = 12;
2541 c->Request.Type.Attribute = ATTR_SIMPLE;
2542 c->Request.Type.Direction = XFER_WRITE;
2543 c->Request.Timeout = 0;
7c832835
BH		 2544 c->Request.CDB[0] = cmd; /* abort */
2545 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2546 /* buff contains the tag of the command to abort */
2547 memcpy(&c->Request.CDB[4], buff, 8);
2548 break;
7c832835 2549 case 1: /* RESET message */
88f627ae 2550 c->Request.CDBLen = 16;
3da8b713 2551 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2552 c->Request.Type.Direction = XFER_NONE;
3da8b713 2553 c->Request.Timeout = 0;
2554 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2555 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2556 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2557 break;
1da177e4
LT		 2558 case 3: /* No-Op message */
2559 c->Request.CDBLen = 1;
2560 c->Request.Type.Attribute = ATTR_SIMPLE;
2561 c->Request.Type.Direction = XFER_WRITE;
2562 c->Request.Timeout = 0;
2563 c->Request.CDB[0] = cmd;
2564 break;
2565 default:
2566 printk(KERN_WARNING
7c832835 2567 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2568 return IO_ERROR;
2569 }
2570 } else {
2571 printk(KERN_WARNING
7c832835 2572 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2573 return IO_ERROR;
2574 }
2575 /* Fill in the scatter gather information */
2576 if (size > 0) {
2577 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2578 buff, size,
2579 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2580 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2581 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2582 c->SG[0].Len = size;
7c832835 2583 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2584 }
2585 return status;
2586}
7c832835 2587
3c2ab402 2588static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2589{
2590 switch (c->err_info->ScsiStatus) {
2591 case SAM_STAT_GOOD:
2592 return IO_OK;
2593 case SAM_STAT_CHECK_CONDITION:
2594 switch (0xf & c->err_info->SenseInfo[2]) {
2595 case 0: return IO_OK; /* no sense */
2596 case 1: return IO_OK; /* recovered error */
2597 default:
c08fac65
SC		 2598 if (check_for_unit_attention(h, c))
2599 return IO_NEEDS_RETRY;
3c2ab402 2600 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2601 "check condition, sense key = 0x%02x\n",
2602 h->ctlr, c->Request.CDB[0],
2603 c->err_info->SenseInfo[2]);
2604 }
2605 break;
2606 default:
2607 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2608 "scsi status = 0x%02x\n", h->ctlr,
2609 c->Request.CDB[0], c->err_info->ScsiStatus);
2610 break;
2611 }
2612 return IO_ERROR;
2613}
2614
789a424a 2615static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2616{
5390cfc3 2617 int return_status = IO_OK;
7c832835 2618
789a424a 2619 if (c->err_info->CommandStatus == CMD_SUCCESS)
2620 return IO_OK;
5390cfc3 2621
2622 switch (c->err_info->CommandStatus) {
2623 case CMD_TARGET_STATUS:
3c2ab402 2624 return_status = check_target_status(h, c);
5390cfc3 2625 break;
2626 case CMD_DATA_UNDERRUN:
2627 case CMD_DATA_OVERRUN:
2628 /* expected for inquiry and report lun commands */
2629 break;
2630 case CMD_INVALID:
789a424a 2631 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2632 "reported invalid\n", c->Request.CDB[0]);
2633 return_status = IO_ERROR;
2634 break;
2635 case CMD_PROTOCOL_ERR:
2636 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2637 "protocol error \n", c->Request.CDB[0]);
2638 return_status = IO_ERROR;
2639 break;
2640 case CMD_HARDWARE_ERR:
2641 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2642 " hardware error\n", c->Request.CDB[0]);
2643 return_status = IO_ERROR;
2644 break;
2645 case CMD_CONNECTION_LOST:
2646 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2647 "connection lost\n", c->Request.CDB[0]);
2648 return_status = IO_ERROR;
2649 break;
2650 case CMD_ABORTED:
2651 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2652 "aborted\n", c->Request.CDB[0]);
2653 return_status = IO_ERROR;
2654 break;
2655 case CMD_ABORT_FAILED:
2656 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2657 "abort failed\n", c->Request.CDB[0]);
2658 return_status = IO_ERROR;
2659 break;
2660 case CMD_UNSOLICITED_ABORT:
2661 printk(KERN_WARNING
2662 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2663 c->Request.CDB[0]);
789a424a 2664 return_status = IO_NEEDS_RETRY;
5390cfc3 2665 break;
2666 default:
2667 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2668 "unknown status %x\n", c->Request.CDB[0],
2669 c->err_info->CommandStatus);
2670 return_status = IO_ERROR;
7c832835 2671 }
789a424a 2672 return return_status;
2673}
2674
2675static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2676 int attempt_retry)
2677{
2678 DECLARE_COMPLETION_ONSTACK(wait);
2679 u64bit buff_dma_handle;
789a424a 2680 int return_status = IO_OK;
2681
2682resend_cmd2:
2683 c->waiting = &wait;
664a717d 2684 enqueue_cmd_and_start_io(h, c);
789a424a 2685
2686 wait_for_completion(&wait);
2687
2688 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2689 goto command_done;
2690
2691 return_status = process_sendcmd_error(h, c);
2692
2693 if (return_status == IO_NEEDS_RETRY &&
2694 c->retry_count < MAX_CMD_RETRIES) {
2695 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2696 c->Request.CDB[0]);
2697 c->retry_count++;
2698 /* erase the old error information */
2699 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2700 return_status = IO_OK;
2701 INIT_COMPLETION(wait);
2702 goto resend_cmd2;
2703 }
5390cfc3 2704
2705command_done:
1da177e4 2706 /* unlock the buffers from DMA */
bb2a37bf
MM		 2707 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2708 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2709 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2710 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2711 return return_status;
2712}
2713
b57695fe 2714static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2715 __u8 page_code, unsigned char scsi3addr[],
2716 int cmd_type)
5390cfc3 2717{
2718 ctlr_info_t *h = hba[ctlr];
2719 CommandList_struct *c;
2720 int return_status;
2721
2722 c = cmd_alloc(h, 0);
2723 if (!c)
2724 return -ENOMEM;
b57695fe 2725 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2726 scsi3addr, cmd_type);
5390cfc3 2727 if (return_status == IO_OK)
789a424a 2728 return_status = sendcmd_withirq_core(h, c, 1);
2729
1da177e4 2730 cmd_free(h, c, 0);
7c832835 2731 return return_status;
1da177e4 2732}
7c832835 2733
1da177e4 2734static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 2735 sector_t total_size,
7c832835
BH		 2736 unsigned int block_size,
2737 InquiryData_struct *inq_buff,
2738 drive_info_struct *drv)
1da177e4
LT		 2739{
2740 int return_code;
00988a35 2741 unsigned long t;
b57695fe 2742 unsigned char scsi3addr[8];
00988a35 2743
1da177e4 2744 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2745 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2746 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2747 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2748 if (return_code == IO_OK) {
7c832835 2749 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2750 printk(KERN_WARNING
7c832835
BH		 2751 "cciss: reading geometry failed, volume "
2752 "does not support reading geometry\n");
1da177e4 2753 drv->heads = 255;
b028461d 2754 drv->sectors = 32; /* Sectors per track */
7f42d3b8 2755 drv->cylinders = total_size + 1;
89f97ad1 2756 drv->raid_level = RAID_UNKNOWN;
1da177e4 2757 } else {
1da177e4
LT		 2758 drv->heads = inq_buff->data_byte[6];
2759 drv->sectors = inq_buff->data_byte[7];
2760 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2761 drv->cylinders += inq_buff->data_byte[5];
2762 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2763 }
2764 drv->block_size = block_size;
97c06978 2765 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2766 t = drv->heads * drv->sectors;
2767 if (t > 1) {
97c06978
MMOD		 2768 sector_t real_size = total_size + 1;
2769 unsigned long rem = sector_div(real_size, t);
3f7705ea 2770 if (rem)
97c06978
MMOD		 2771 real_size++;
2772 drv->cylinders = real_size;
1da177e4 2773 }
7c832835 2774 } else { /* Get geometry failed */
1da177e4
LT		 2775 printk(KERN_WARNING "cciss: reading geometry failed\n");
2776 }
1da177e4 2777}
7c832835 2778
1da177e4 2779static void
7b838bde 2780cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
7c832835 2781 unsigned int *block_size)
1da177e4 2782{
00988a35 2783 ReadCapdata_struct *buf;
1da177e4 2784 int return_code;
b57695fe 2785 unsigned char scsi3addr[8];
1aebe187
MK		 2786
2787 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2788 if (!buf) {
00988a35
MMOD		 2789 printk(KERN_WARNING "cciss: out of memory\n");
2790 return;
2791 }
1aebe187 2792
b57695fe 2793 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2794 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2795 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2796 if (return_code == IO_OK) {
4c1f2b31
AV		 2797 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2798 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2799 } else { /* read capacity command failed */
1da177e4
LT		 2800 printk(KERN_WARNING "cciss: read capacity failed\n");
2801 *total_size = 0;
2802 *block_size = BLOCK_SIZE;
2803 }
00988a35 2804 kfree(buf);
00988a35
MMOD		 2805}
2806
7b838bde
SC		 2807static void cciss_read_capacity_16(int ctlr, int logvol,
2808 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD		 2809{
2810 ReadCapdata_struct_16 *buf;
2811 int return_code;
b57695fe 2812 unsigned char scsi3addr[8];
1aebe187
MK		 2813
2814 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2815 if (!buf) {
00988a35
MMOD		 2816 printk(KERN_WARNING "cciss: out of memory\n");
2817 return;
2818 }
1aebe187 2819
b57695fe 2820 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2821 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2822 ctlr, buf, sizeof(ReadCapdata_struct_16),
2823 0, scsi3addr, TYPE_CMD);
00988a35 2824 if (return_code == IO_OK) {
4c1f2b31
AV		 2825 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2826 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2827 } else { /* read capacity command failed */
2828 printk(KERN_WARNING "cciss: read capacity failed\n");
2829 *total_size = 0;
2830 *block_size = BLOCK_SIZE;
2831 }
7b92aadf 2832 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2833 (unsigned long long)*total_size+1, *block_size);
00988a35 2834 kfree(buf);
1da177e4
LT		 2835}
2836
1da177e4
LT		 2837static int cciss_revalidate(struct gendisk *disk)
2838{
2839 ctlr_info_t *h = get_host(disk);
2840 drive_info_struct *drv = get_drv(disk);
2841 int logvol;
7c832835 2842 int FOUND = 0;
1da177e4 2843 unsigned int block_size;
00988a35 2844 sector_t total_size;
1da177e4
LT		 2845 InquiryData_struct *inq_buff = NULL;
2846
7c832835 2847 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2848 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2849 sizeof(drv->LunID)) == 0) {
7c832835 2850 FOUND = 1;
1da177e4
LT		 2851 break;
2852 }
2853 }
2854
7c832835
BH		 2855 if (!FOUND)
2856 return 1;
1da177e4 2857
7c832835
BH		 2858 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2859 if (inq_buff == NULL) {
2860 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2861 return 1;
2862 }
00988a35 2863 if (h->cciss_read == CCISS_READ_10) {
7b838bde 2864 cciss_read_capacity(h->ctlr, logvol,
00988a35
MMOD		 2865 &total_size, &block_size);
2866 } else {
7b838bde 2867 cciss_read_capacity_16(h->ctlr, logvol,
00988a35
MMOD		 2868 &total_size, &block_size);
2869 }
7b838bde 2870 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
7c832835 2871 inq_buff, drv);
1da177e4 2872
e1defc4f 2873 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2874 set_capacity(disk, drv->nr_blocks);
2875
1da177e4
LT		 2876 kfree(inq_buff);
2877 return 0;
2878}
2879
1da177e4
LT		 2880/*
2881 * Map (physical) PCI mem into (virtual) kernel space
2882 */
2883static void __iomem *remap_pci_mem(ulong base, ulong size)
2884{
7c832835
BH		 2885 ulong page_base = ((ulong) base) & PAGE_MASK;
2886 ulong page_offs = ((ulong) base) - page_base;
2887 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2888
7c832835 2889 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2890}
2891
7c832835
BH		 2892/*
2893 * Takes jobs of the Q and sends them to the hardware, then puts it on
2894 * the Q to wait for completion.
2895 */
2896static void start_io(ctlr_info_t *h)
1da177e4
LT		 2897{
2898 CommandList_struct *c;
7c832835 2899
8a3173de
JA		 2900 while (!hlist_empty(&h->reqQ)) {
2901 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2902 /* can't do anything if fifo is full */
2903 if ((h->access.fifo_full(h))) {
2904 printk(KERN_WARNING "cciss: fifo full\n");
2905 break;
2906 }
2907
7c832835 2908 /* Get the first entry from the Request Q */
8a3173de 2909 removeQ(c);
1da177e4 2910 h->Qdepth--;
7c832835
BH		 2911
2912 /* Tell the controller execute command */
1da177e4 2913 h->access.submit_command(h, c);
7c832835
BH		 2914
2915 /* Put job onto the completed Q */
8a3173de 2916 addQ(&h->cmpQ, c);
1da177e4
LT		 2917 }
2918}
7c832835 2919
1da177e4
LT		 2920/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2921/* Zeros out the error record and then resends the command back */
2922/* to the controller */
7c832835 2923static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2924{
2925 /* erase the old error information */
2926 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2927
2928 /* add it to software queue and then send it to the controller */
8a3173de 2929 addQ(&h->reqQ, c);
1da177e4 2930 h->Qdepth++;
7c832835 2931 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2932 h->maxQsinceinit = h->Qdepth;
2933
2934 start_io(h);
2935}
a9925a06 2936
1a614f50
SC		 2937static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2938 unsigned int msg_byte, unsigned int host_byte,
2939 unsigned int driver_byte)
2940{
2941 /* inverse of macros in scsi.h */
2942 return (scsi_status_byte & 0xff) |
2943 ((msg_byte & 0xff) << 8) |
2944 ((host_byte & 0xff) << 16) |
2945 ((driver_byte & 0xff) << 24);
2946}
2947
0a9279cc
MM		 2948static inline int evaluate_target_status(ctlr_info_t *h,
2949 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2950{
2951 unsigned char sense_key;
1a614f50
SC		 2952 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2953 int error_value;
2954
0a9279cc 2955 *retry_cmd = 0;
1a614f50
SC		 2956 /* If we get in here, it means we got "target status", that is, scsi status */
2957 status_byte = cmd->err_info->ScsiStatus;
2958 driver_byte = DRIVER_OK;
2959 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2960
2961 if (blk_pc_request(cmd->rq))
2962 host_byte = DID_PASSTHROUGH;
2963 else
2964 host_byte = DID_OK;
2965
2966 error_value = make_status_bytes(status_byte, msg_byte,
2967 host_byte, driver_byte);
03bbfee5 2968
1a614f50 2969 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2970 if (!blk_pc_request(cmd->rq))
2971 printk(KERN_WARNING "cciss: cmd %p "
2972 "has SCSI Status 0x%x\n",
2973 cmd, cmd->err_info->ScsiStatus);
1a614f50 2974 return error_value;
03bbfee5
MMOD		 2975 }
2976
2977 /* check the sense key */
2978 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2979 /* no status or recovered error */
1a614f50
SC		 2980 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2981 error_value = 0;
03bbfee5 2982
0a9279cc
MM		 2983 if (check_for_unit_attention(h, cmd)) {
2984 *retry_cmd = !blk_pc_request(cmd->rq);
2985 return 0;
2986 }
2987
03bbfee5 2988 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2989 if (error_value != 0)
03bbfee5
MMOD		 2990 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2991 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2992 return error_value;
03bbfee5
MMOD		 2993 }
2994
2995 /* SG_IO or similar, copy sense data back */
2996 if (cmd->rq->sense) {
2997 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2998 cmd->rq->sense_len = cmd->err_info->SenseLen;
2999 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3000 cmd->rq->sense_len);
3001 } else
3002 cmd->rq->sense_len = 0;
3003
1a614f50 3004 return error_value;
03bbfee5
MMOD		 3005}
3006
7c832835 3007/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3008 * buffers for the completed job. Note that this function does not need
3009 * to hold the hba/queue lock.
7c832835
BH		 3010 */
3011static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3012 int timeout)
1da177e4 3013{
1da177e4 3014 int retry_cmd = 0;
198b7660
MMOD		 3015 struct request *rq = cmd->rq;
3016
3017 rq->errors = 0;
7c832835 3018
1da177e4 3019 if (timeout)
1a614f50 3020 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3021
d38ae168
MMOD		 3022 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3023 goto after_error_processing;
7c832835 3024
d38ae168 3025 switch (cmd->err_info->CommandStatus) {
d38ae168 3026 case CMD_TARGET_STATUS:
0a9279cc 3027 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3028 break;
3029 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3030 if (blk_fs_request(cmd->rq)) {
3031 printk(KERN_WARNING "cciss: cmd %p has"
3032 " completed with data underrun "
3033 "reported\n", cmd);
c3a4d78c 3034 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3035 }
d38ae168
MMOD		 3036 break;
3037 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3038 if (blk_fs_request(cmd->rq))
3039 printk(KERN_WARNING "cciss: cmd %p has"
3040 " completed with data overrun "
3041 "reported\n", cmd);
d38ae168
MMOD		 3042 break;
3043 case CMD_INVALID:
3044 printk(KERN_WARNING "cciss: cmd %p is "
3045 "reported invalid\n", cmd);
1a614f50
SC		 3046 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3047 cmd->err_info->CommandStatus, DRIVER_OK,
3048 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3049 break;
3050 case CMD_PROTOCOL_ERR:
3051 printk(KERN_WARNING "cciss: cmd %p has "
3052 "protocol error \n", cmd);
1a614f50
SC		 3053 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3054 cmd->err_info->CommandStatus, DRIVER_OK,
3055 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3056 break;
3057 case CMD_HARDWARE_ERR:
3058 printk(KERN_WARNING "cciss: cmd %p had "
3059 " hardware error\n", cmd);
1a614f50
SC		 3060 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3061 cmd->err_info->CommandStatus, DRIVER_OK,
3062 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3063 break;
3064 case CMD_CONNECTION_LOST:
3065 printk(KERN_WARNING "cciss: cmd %p had "
3066 "connection lost\n", cmd);
1a614f50
SC		 3067 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3068 cmd->err_info->CommandStatus, DRIVER_OK,
3069 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3070 break;
3071 case CMD_ABORTED:
3072 printk(KERN_WARNING "cciss: cmd %p was "
3073 "aborted\n", cmd);
1a614f50
SC		 3074 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3075 cmd->err_info->CommandStatus, DRIVER_OK,
3076 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3077 break;
3078 case CMD_ABORT_FAILED:
3079 printk(KERN_WARNING "cciss: cmd %p reports "
3080 "abort failed\n", cmd);
1a614f50
SC		 3081 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3082 cmd->err_info->CommandStatus, DRIVER_OK,
3083 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3084 break;
3085 case CMD_UNSOLICITED_ABORT:
3086 printk(KERN_WARNING "cciss%d: unsolicited "
3087 "abort %p\n", h->ctlr, cmd);
3088 if (cmd->retry_count < MAX_CMD_RETRIES) {
3089 retry_cmd = 1;
3090 printk(KERN_WARNING
3091 "cciss%d: retrying %p\n", h->ctlr, cmd);
3092 cmd->retry_count++;
3093 } else
3094 printk(KERN_WARNING
3095 "cciss%d: %p retried too "
3096 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3097 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3098 cmd->err_info->CommandStatus, DRIVER_OK,
3099 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3100 break;
3101 case CMD_TIMEOUT:
3102 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3103 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3104 cmd->err_info->CommandStatus, DRIVER_OK,
3105 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3106 break;
3107 default:
3108 printk(KERN_WARNING "cciss: cmd %p returned "
3109 "unknown status %x\n", cmd,
3110 cmd->err_info->CommandStatus);
1a614f50
SC		 3111 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3112 cmd->err_info->CommandStatus, DRIVER_OK,
3113 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3114 }
d38ae168
MMOD		 3115
3116after_error_processing:
3117
1da177e4 3118 /* We need to return this command */
7c832835
BH		 3119 if (retry_cmd) {
3120 resend_cciss_cmd(h, cmd);
1da177e4 3121 return;
7c832835 3122 }
03bbfee5 3123 cmd->rq->completion_data = cmd;
a9925a06 3124 blk_complete_request(cmd->rq);
1da177e4
LT		 3125}
3126
7c832835
BH		 3127/*
3128 * Get a request and submit it to the controller.
1da177e4 3129 */
165125e1 3130static void do_cciss_request(struct request_queue *q)
1da177e4 3131{
7c832835 3132 ctlr_info_t *h = q->queuedata;
1da177e4 3133 CommandList_struct *c;
00988a35
MMOD		 3134 sector_t start_blk;
3135 int seg;
1da177e4
LT		 3136 struct request *creq;
3137 u64bit temp64;
5c07a311
DB		 3138 struct scatterlist *tmp_sg;
3139 SGDescriptor_struct *curr_sg;
1da177e4
LT		 3140 drive_info_struct *drv;
3141 int i, dir;
5c07a311
DB		 3142 int sg_index = 0;
3143 int chained = 0;
1da177e4
LT		 3144
3145 /* We call start_io here in case there is a command waiting on the
3146 * queue that has not been sent.
7c832835 3147 */
1da177e4
LT		 3148 if (blk_queue_plugged(q))
3149 goto startio;
3150
7c832835 3151 queue:
9934c8c0 3152 creq = blk_peek_request(q);
1da177e4
LT		 3153 if (!creq)
3154 goto startio;
3155
5c07a311 3156 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
1da177e4 3157
7c832835 3158 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3159 goto full;
3160
9934c8c0 3161 blk_start_request(creq);
1da177e4 3162
5c07a311 3163 tmp_sg = h->scatter_list[c->cmdindex];
1da177e4
LT		 3164 spin_unlock_irq(q->queue_lock);
3165
3166 c->cmd_type = CMD_RWREQ;
3167 c->rq = creq;
7c832835
BH		 3168
3169 /* fill in the request */
1da177e4 3170 drv = creq->rq_disk->private_data;
b028461d 3171 c->Header.ReplyQueue = 0; /* unused in simple mode */
33079b21
MM		 3172 /* got command from pool, so use the command block index instead */
3173 /* for direct lookups. */
3174 /* The first 2 bits are reserved for controller error reporting. */
3175 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3176 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3177 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
b028461d 3178 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3179 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
7c832835
BH		 3180 c->Request.Type.Attribute = ATTR_SIMPLE;
3181 c->Request.Type.Direction =
a52de245 3182 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
b028461d 3183 c->Request.Timeout = 0; /* Don't time out */
7c832835 3184 c->Request.CDB[0] =
00988a35 3185 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3186 start_blk = blk_rq_pos(creq);
1da177e4 3187#ifdef CCISS_DEBUG
83096ebf
TH		 3188 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3189 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3190#endif /* CCISS_DEBUG */
1da177e4 3191
5c07a311 3192 sg_init_table(tmp_sg, h->maxsgentries);
1da177e4
LT		 3193 seg = blk_rq_map_sg(q, creq, tmp_sg);
3194
7c832835 3195 /* get the DMA records for the setup */
1da177e4
LT		 3196 if (c->Request.Type.Direction == XFER_READ)
3197 dir = PCI_DMA_FROMDEVICE;
3198 else
3199 dir = PCI_DMA_TODEVICE;
3200
5c07a311
DB		 3201 curr_sg = c->SG;
3202 sg_index = 0;
3203 chained = 0;
3204
7c832835 3205 for (i = 0; i < seg; i++) {
5c07a311
DB		 3206 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3207 !chained && ((seg - i) > 1)) {
5c07a311 3208 /* Point to next chain block. */
dccc9b56 3209 curr_sg = h->cmd_sg_list[c->cmdindex];
5c07a311
DB		 3210 sg_index = 0;
3211 chained = 1;
3212 }
3213 curr_sg[sg_index].Len = tmp_sg[i].length;
45711f1a 3214 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
5c07a311
DB		 3215 tmp_sg[i].offset,
3216 tmp_sg[i].length, dir);
3217 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3218 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3219 curr_sg[sg_index].Ext = 0; /* we are not chaining */
5c07a311 3220 ++sg_index;
1da177e4 3221 }
d45033ef
SC		 3222 if (chained)
3223 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3224 (seg - (h->max_cmd_sgentries - 1)) *
3225 sizeof(SGDescriptor_struct));
5c07a311 3226
7c832835
BH		 3227 /* track how many SG entries we are using */
3228 if (seg > h->maxSG)
3229 h->maxSG = seg;
1da177e4
LT		 3230
3231#ifdef CCISS_DEBUG
5c07a311
DB		 3232 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3233 "chained[%d]\n",
3234 blk_rq_sectors(creq), seg, chained);
7c832835 3235#endif /* CCISS_DEBUG */
1da177e4 3236
5c07a311
DB		 3237 c->Header.SGList = c->Header.SGTotal = seg + chained;
3238 if (seg > h->max_cmd_sgentries)
3239 c->Header.SGList = h->max_cmd_sgentries;
3240
03bbfee5
MMOD		 3241 if (likely(blk_fs_request(creq))) {
3242 if(h->cciss_read == CCISS_READ_10) {
3243 c->Request.CDB[1] = 0;
b028461d 3244 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
03bbfee5
MMOD		 3245 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3246 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3247 c->Request.CDB[5] = start_blk & 0xff;
b028461d 3248 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
83096ebf
TH		 3249 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3250 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3251 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3252 } else {
582539e5
RD		 3253 u32 upper32 = upper_32_bits(start_blk);
3254
03bbfee5
MMOD		 3255 c->Request.CDBLen = 16;
3256 c->Request.CDB[1]= 0;
b028461d 3257 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
582539e5
RD		 3258 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3259 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3260 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3261 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3262 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3263 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3264 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3265 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3266 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3267 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3268 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3269 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3270 }
3271 } else if (blk_pc_request(creq)) {
3272 c->Request.CDBLen = creq->cmd_len;
3273 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3274 } else {
03bbfee5
MMOD		 3275 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3276 BUG();
00988a35 3277 }
1da177e4
LT		 3278
3279 spin_lock_irq(q->queue_lock);
3280
8a3173de 3281 addQ(&h->reqQ, c);
1da177e4 3282 h->Qdepth++;
7c832835
BH		 3283 if (h->Qdepth > h->maxQsinceinit)
3284 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3285
3286 goto queue;
00988a35 3287full:
1da177e4 3288 blk_stop_queue(q);
00988a35 3289startio:
1da177e4
LT		 3290 /* We will already have the driver lock here so not need
3291 * to lock it.
7c832835 3292 */
1da177e4
LT		 3293 start_io(h);
3294}
3295
3da8b713 3296static inline unsigned long get_next_completion(ctlr_info_t *h)
3297{
3da8b713 3298 return h->access.command_completed(h);
3da8b713 3299}
3300
3301static inline int interrupt_pending(ctlr_info_t *h)
3302{
3da8b713 3303 return h->access.intr_pending(h);
3da8b713 3304}
3305
3306static inline long interrupt_not_for_us(ctlr_info_t *h)
3307{
7c832835 3308 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3309 (h->interrupts_enabled == 0)));
3da8b713 3310}
3311
7d12e780 3312static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3313{
3314 ctlr_info_t *h = dev_id;
3315 CommandList_struct *c;
3316 unsigned long flags;
33079b21 3317 __u32 a, a1, a2;
1da177e4 3318
3da8b713 3319 if (interrupt_not_for_us(h))
1da177e4 3320 return IRQ_NONE;
1da177e4
LT		 3321 /*
3322 * If there are completed commands in the completion queue,
3323 * we had better do something about it.
3324 */
3325 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3326 while (interrupt_pending(h)) {
7c832835 3327 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3328 a1 = a;
33079b21
MM		 3329 if ((a & 0x04)) {
3330 a2 = (a >> 3);
f880632f 3331 if (a2 >= h->nr_cmds) {
7c832835
BH		 3332 printk(KERN_WARNING
3333 "cciss: controller cciss%d failed, stopping.\n",
3334 h->ctlr);
829f46af 3335 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
33079b21
MM		 3336 fail_all_cmds(h->ctlr);
3337 return IRQ_HANDLED;
3338 }
3339
3340 c = h->cmd_pool + a2;
3341 a = c->busaddr;
3342
3343 } else {
8a3173de
JA		 3344 struct hlist_node *tmp;
3345
7c832835 3346 a &= ~3;
8a3173de
JA		 3347 c = NULL;
3348 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3349 if (c->busaddr == a)
7c832835
BH		 3350 break;
3351 }
33079b21 3352 }
1da177e4
LT		 3353 /*
3354 * If we've found the command, take it off the
3355 * completion Q and free it
3356 */
8a3173de
JA		 3357 if (c && c->busaddr == a) {
3358 removeQ(c);
1da177e4
LT		 3359 if (c->cmd_type == CMD_RWREQ) {
3360 complete_command(h, c, 0);
3361 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3362 complete(c->waiting);
3363 }
3364# ifdef CONFIG_CISS_SCSI_TAPE
3365 else if (c->cmd_type == CMD_SCSI)
3366 complete_scsi_command(c, 0, a1);
3367# endif
3368 continue;
3369 }
3370 }
3371 }
3372
1da177e4
LT		 3373 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3374 return IRQ_HANDLED;
3375}
7c832835 3376
b368c9dd
AP		 3377/**
3378 * add_to_scan_list() - add controller to rescan queue
3379 * @h: Pointer to the controller.
3380 *
3381 * Adds the controller to the rescan queue if not already on the queue.
3382 *
3383 * returns 1 if added to the queue, 0 if skipped (could be on the
3384 * queue already, or the controller could be initializing or shutting
3385 * down).
3386 **/
3387static int add_to_scan_list(struct ctlr_info *h)
3388{
3389 struct ctlr_info *test_h;
3390 int found = 0;
3391 int ret = 0;
3392
3393 if (h->busy_initializing)
3394 return 0;
3395
3396 if (!mutex_trylock(&h->busy_shutting_down))
3397 return 0;
3398
3399 mutex_lock(&scan_mutex);
3400 list_for_each_entry(test_h, &scan_q, scan_list) {
3401 if (test_h == h) {
3402 found = 1;
3403 break;
3404 }
3405 }
3406 if (!found && !h->busy_scanning) {
3407 INIT_COMPLETION(h->scan_wait);
3408 list_add_tail(&h->scan_list, &scan_q);
3409 ret = 1;
3410 }
3411 mutex_unlock(&scan_mutex);
3412 mutex_unlock(&h->busy_shutting_down);
3413
3414 return ret;
3415}
3416
3417/**
3418 * remove_from_scan_list() - remove controller from rescan queue
3419 * @h: Pointer to the controller.
3420 *
3421 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC		 3422 * the controller is currently conducting a rescan. The controller
3423 * can be in one of three states:
3424 * 1. Doesn't need a scan
3425 * 2. On the scan list, but not scanning yet (we remove it)
3426 * 3. Busy scanning (and not on the list). In this case we want to wait for
3427 * the scan to complete to make sure the scanning thread for this
3428 * controller is completely idle.
b368c9dd
AP		 3429 **/
3430static void remove_from_scan_list(struct ctlr_info *h)
3431{
3432 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP		 3433
3434 mutex_lock(&scan_mutex);
3435 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3436 if (test_h == h) { /* state 2. */
b368c9dd
AP		 3437 list_del(&h->scan_list);
3438 complete_all(&h->scan_wait);
3439 mutex_unlock(&scan_mutex);
3440 return;
3441 }
3442 }
fd8489cf
SC		 3443 if (h->busy_scanning) { /* state 3. */
3444 mutex_unlock(&scan_mutex);
b368c9dd 3445 wait_for_completion(&h->scan_wait);
fd8489cf
SC		 3446 } else { /* state 1, nothing to do. */
3447 mutex_unlock(&scan_mutex);
3448 }
b368c9dd
AP		 3449}
3450
3451/**
3452 * scan_thread() - kernel thread used to rescan controllers
3453 * @data: Ignored.
3454 *
3455 * A kernel thread used scan for drive topology changes on
3456 * controllers. The thread processes only one controller at a time
3457 * using a queue. Controllers are added to the queue using
3458 * add_to_scan_list() and removed from the queue either after done
3459 * processing or using remove_from_scan_list().
3460 *
3461 * returns 0.
3462 **/
0a9279cc
MM		 3463static int scan_thread(void *data)
3464{
b368c9dd 3465 struct ctlr_info *h;
0a9279cc 3466
b368c9dd
AP		 3467 while (1) {
3468 set_current_state(TASK_INTERRUPTIBLE);
3469 schedule();
0a9279cc
MM		 3470 if (kthread_should_stop())
3471 break;
b368c9dd
AP		 3472
3473 while (1) {
3474 mutex_lock(&scan_mutex);
3475 if (list_empty(&scan_q)) {
3476 mutex_unlock(&scan_mutex);
3477 break;
3478 }
3479
3480 h = list_entry(scan_q.next,
3481 struct ctlr_info,
3482 scan_list);
3483 list_del(&h->scan_list);
3484 h->busy_scanning = 1;
3485 mutex_unlock(&scan_mutex);
3486
d06dfbd2
SC		 3487 rebuild_lun_table(h, 0, 0);
3488 complete_all(&h->scan_wait);
3489 mutex_lock(&scan_mutex);
3490 h->busy_scanning = 0;
3491 mutex_unlock(&scan_mutex);
b368c9dd 3492 }
0a9279cc 3493 }
b368c9dd 3494
0a9279cc
MM		 3495 return 0;
3496}
3497
3498static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3499{
3500 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3501 return 0;
3502
3503 switch (c->err_info->SenseInfo[12]) {
3504 case STATE_CHANGED:
3505 printk(KERN_WARNING "cciss%d: a state change "
3506 "detected, command retried\n", h->ctlr);
3507 return 1;
3508 break;
3509 case LUN_FAILED:
3510 printk(KERN_WARNING "cciss%d: LUN failure "
3511 "detected, action required\n", h->ctlr);
3512 return 1;
3513 break;
3514 case REPORT_LUNS_CHANGED:
3515 printk(KERN_WARNING "cciss%d: report LUN data "
3516 "changed\n", h->ctlr);
da002184
SC		 3517 /*
3518 * Here, we could call add_to_scan_list and wake up the scan thread,
3519 * except that it's quite likely that we will get more than one
3520 * REPORT_LUNS_CHANGED condition in quick succession, which means
3521 * that those which occur after the first one will likely happen
3522 * *during* the scan_thread's rescan. And the rescan code is not
3523 * robust enough to restart in the middle, undoing what it has already
3524 * done, and it's not clear that it's even possible to do this, since
3525 * part of what it does is notify the block layer, which starts
3526 * doing it's own i/o to read partition tables and so on, and the
3527 * driver doesn't have visibility to know what might need undoing.
3528 * In any event, if possible, it is horribly complicated to get right
3529 * so we just don't do it for now.
3530 *
3531 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3532 */
0a9279cc
MM		 3533 return 1;
3534 break;
3535 case POWER_OR_RESET:
3536 printk(KERN_WARNING "cciss%d: a power on "
3537 "or device reset detected\n", h->ctlr);
3538 return 1;
3539 break;
3540 case UNIT_ATTENTION_CLEARED:
3541 printk(KERN_WARNING "cciss%d: unit attention "
3542 "cleared by another initiator\n", h->ctlr);
3543 return 1;
3544 break;
3545 default:
3546 printk(KERN_WARNING "cciss%d: unknown "
3547 "unit attention detected\n", h->ctlr);
3548 return 1;
3549 }
3550}
3551
7c832835 3552/*
d14c4ab5 3553 * We cannot read the structure directly, for portability we must use
1da177e4 3554 * the io functions.
7c832835 3555 * This is for debug only.
1da177e4
LT		 3556 */
3557#ifdef CCISS_DEBUG
7c832835 3558static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3559{
3560 int i;
3561 char temp_name[17];
3562
3563 printk("Controller Configuration information\n");
3564 printk("------------------------------------\n");
7c832835 3565 for (i = 0; i < 4; i++)
1da177e4 3566 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3567 temp_name[4] = '\0';
3568 printk(" Signature = %s\n", temp_name);
1da177e4 3569 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3570 printk(" Transport methods supported = 0x%x\n",
3571 readl(&(tb->TransportSupport)));
3572 printk(" Transport methods active = 0x%x\n",
3573 readl(&(tb->TransportActive)));
3574 printk(" Requested transport Method = 0x%x\n",
3575 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3576 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3577 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3578 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3579 readl(&(tb->HostWrite.CoalIntCount)));
3580 printk(" Max outstanding commands = 0x%d\n",
3581 readl(&(tb->CmdsOutMax)));
3582 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3583 for (i = 0; i < 16; i++)
1da177e4
LT		 3584 temp_name[i] = readb(&(tb->ServerName[i]));
3585 temp_name[16] = '\0';
3586 printk(" Server Name = %s\n", temp_name);
7c832835 3587 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3588}
7c832835 3589#endif /* CCISS_DEBUG */
1da177e4 3590
7c832835 3591static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3592{
3593 int i, offset, mem_type, bar_type;
7c832835 3594 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3595 return 0;
3596 offset = 0;
7c832835
BH		 3597 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3598 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3599 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3600 offset += 4;
3601 else {
3602 mem_type = pci_resource_flags(pdev, i) &
7c832835 3603 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3604 switch (mem_type) {
7c832835
BH		 3605 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3606 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3607 offset += 4; /* 32 bit */
3608 break;
3609 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3610 offset += 8;
3611 break;
3612 default: /* reserved in PCI 2.2 */
3613 printk(KERN_WARNING
3614 "Base address is invalid\n");
3615 return -1;
1da177e4
LT		 3616 break;
3617 }
3618 }
7c832835
BH		 3619 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3620 return i + 1;
1da177e4
LT		 3621 }
3622 return -1;
3623}
3624
fb86a35b
MM		 3625/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3626 * controllers that are capable. If not, we use IO-APIC mode.
3627 */
3628
7c832835
BH		 3629static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3630 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3631{
3632#ifdef CONFIG_PCI_MSI
7c832835
BH		 3633 int err;
3634 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3635 {0, 2}, {0, 3}
3636 };
fb86a35b
MM		 3637
3638 /* Some boards advertise MSI but don't really support it */
3639 if ((board_id == 0x40700E11) ||
7c832835
BH		 3640 (board_id == 0x40800E11) ||
3641 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3642 goto default_int_mode;
3643
7c832835
BH		 3644 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3645 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3646 if (!err) {
3647 c->intr[0] = cciss_msix_entries[0].vector;
3648 c->intr[1] = cciss_msix_entries[1].vector;
3649 c->intr[2] = cciss_msix_entries[2].vector;
3650 c->intr[3] = cciss_msix_entries[3].vector;
3651 c->msix_vector = 1;
3652 return;
3653 }
3654 if (err > 0) {
3655 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3656 "available\n", err);
1ecb9c0f 3657 goto default_int_mode;
7c832835
BH		 3658 } else {
3659 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3660 err);
1ecb9c0f 3661 goto default_int_mode;
7c832835
BH		 3662 }
3663 }
3664 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3665 if (!pci_enable_msi(pdev)) {
7c832835 3666 c->msi_vector = 1;
7c832835
BH		 3667 } else {
3668 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3669 }
3670 }
1ecb9c0f 3671default_int_mode:
7c832835 3672#endif /* CONFIG_PCI_MSI */
fb86a35b 3673 /* if we get here we're going to use the default interrupt mode */
7c832835 3674 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3675 return;
3676}
3677
7d1fd970 3678static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3679{
3680 ushort subsystem_vendor_id, subsystem_device_id, command;
3681 __u32 board_id, scratchpad = 0;
3682 __u64 cfg_offset;
3683 __u32 cfg_base_addr;
3684 __u64 cfg_base_addr_index;
2ec24ff1
SC		 3685 int i, prod_index, err;
3686
3687 subsystem_vendor_id = pdev->subsystem_vendor;
3688 subsystem_device_id = pdev->subsystem_device;
3689 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3690 subsystem_vendor_id);
3691
3692 for (i = 0; i < ARRAY_SIZE(products); i++) {
3693 /* Stand aside for hpsa driver on request */
3694 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3695 return -ENODEV;
3696 if (board_id == products[i].board_id)
3697 break;
3698 }
3699 prod_index = i;
3700 if (prod_index == ARRAY_SIZE(products)) {
3701 dev_warn(&pdev->dev,
3702 "unrecognized board ID: 0x%08lx, ignoring.\n",
3703 (unsigned long) board_id);
3704 return -ENODEV;
3705 }
1da177e4
LT		 3706
3707 /* check to see if controller has been disabled */
3708 /* BEFORE trying to enable it */
7c832835
BH		 3709 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3710 if (!(command & 0x02)) {
3711 printk(KERN_WARNING
3712 "cciss: controller appears to be disabled\n");
c33ac89b 3713 return -ENODEV;
1da177e4
LT		 3714 }
3715
c33ac89b 3716 err = pci_enable_device(pdev);
7c832835 3717 if (err) {
1da177e4 3718 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3719 return err;
1da177e4 3720 }
1da177e4 3721
4e570309
BH		 3722 err = pci_request_regions(pdev, "cciss");
3723 if (err) {
3724 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3725 "aborting\n");
872225ca 3726 return err;
4e570309
BH		 3727 }
3728
1da177e4
LT		 3729#ifdef CCISS_DEBUG
3730 printk("command = %x\n", command);
3731 printk("irq = %x\n", pdev->irq);
3732 printk("board_id = %x\n", board_id);
7c832835 3733#endif /* CCISS_DEBUG */
1da177e4 3734
fb86a35b
MM		 3735/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3736 * else we use the IO-APIC interrupt assigned to us by system ROM.
3737 */
3738 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3739
e1438581
MM		 3740 /* find the memory BAR */
3741 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3742 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3743 break;
3744 }
3745 if (i == DEVICE_COUNT_RESOURCE) {
3746 printk(KERN_WARNING "cciss: No memory BAR found\n");
3747 err = -ENODEV;
3748 goto err_out_free_res;
3749 }
3750
3751 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3752 * already removed
3753 */
1da177e4 3754
1da177e4 3755#ifdef CCISS_DEBUG
9f92f471 3756 printk("address 0 = %lx\n", c->paddr);
7c832835 3757#endif /* CCISS_DEBUG */
a5b92873 3758 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3759
3760 /* Wait for the board to become ready. (PCI hotplug needs this.)
3761 * We poll for up to 120 secs, once per 100ms. */
7c832835 3762 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3763 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3764 if (scratchpad == CCISS_FIRMWARE_READY)
3765 break;
3766 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3767 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3768 }
3769 if (scratchpad != CCISS_FIRMWARE_READY) {
3770 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3771 err = -ENODEV;
4e570309 3772 goto err_out_free_res;
1da177e4
LT		 3773 }
3774
3775 /* get the address index number */
3776 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3777 cfg_base_addr &= (__u32) 0x0000ffff;
3778#ifdef CCISS_DEBUG
3779 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3780#endif /* CCISS_DEBUG */
3781 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3782#ifdef CCISS_DEBUG
9f92f471
RD		 3783 printk("cfg base address index = %llx\n",
3784 (unsigned long long)cfg_base_addr_index);
7c832835 3785#endif /* CCISS_DEBUG */
1da177e4
LT		 3786 if (cfg_base_addr_index == -1) {
3787 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3788 err = -ENODEV;
4e570309 3789 goto err_out_free_res;
1da177e4
LT		 3790 }
3791
3792 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3793#ifdef CCISS_DEBUG
9f92f471 3794 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3795#endif /* CCISS_DEBUG */
3796 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3797 cfg_base_addr_index) +
3798 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3799 c->board_id = board_id;
3800
3801#ifdef CCISS_DEBUG
945f390f 3802 print_cfg_table(c->cfgtable);
7c832835 3803#endif /* CCISS_DEBUG */
1da177e4 3804
49153998
MM		 3805 /* Some controllers support Zero Memory Raid (ZMR).
3806 * When configured in ZMR mode the number of supported
3807 * commands drops to 64. So instead of just setting an
3808 * arbitrary value we make the driver a little smarter.
3809 * We read the config table to tell us how many commands
3810 * are supported on the controller then subtract 4 to
3811 * leave a little room for ioctl calls.
3812 */
3813 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
5c07a311
DB		 3814 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
3815
3816 /*
3817 * Limit native command to 32 s/g elements to save dma'able memory.
3818 * Howvever spec says if 0, use 31
3819 */
3820
3821 c->max_cmd_sgentries = 31;
3822 if (c->maxsgentries > 512) {
3823 c->max_cmd_sgentries = 32;
3824 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
3825 c->maxsgentries -= 1; /* account for chain pointer */
3826 } else {
3827 c->maxsgentries = 31; /* Default to traditional value */
3828 c->chainsize = 0; /* traditional */
3829 }
3830
2ec24ff1
SC		 3831 c->product_name = products[prod_index].product_name;
3832 c->access = *(products[prod_index].access);
3833 c->nr_cmds = c->max_commands - 4;
7c832835
BH		 3834 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3835 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3836 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3837 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3838 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3839 err = -ENODEV;
4e570309 3840 goto err_out_free_res;
1da177e4 3841 }
1da177e4 3842#ifdef CONFIG_X86
7c832835
BH		 3843 {
3844 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3845 __u32 prefetch;
3846 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3847 prefetch |= 0x100;
3848 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3849 }
1da177e4
LT		 3850#endif
3851
8bf50f71
MMOD		 3852 /* Disabling DMA prefetch and refetch for the P600.
3853 * An ASIC bug may result in accesses to invalid memory addresses.
3854 * We've disabled prefetch for some time now. Testing with XEN
3855 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3856 */
3857 if(board_id == 0x3225103C) {
3858 __u32 dma_prefetch;
8bf50f71 3859 __u32 dma_refetch;
f92e2f5f
MM		 3860 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3861 dma_prefetch |= 0x8000;
3862 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3863 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3864 dma_refetch |= 0x1;
3865 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3866 }
3867
1da177e4
LT		 3868#ifdef CCISS_DEBUG
3869 printk("Trying to put board into Simple mode\n");
7c832835 3870#endif /* CCISS_DEBUG */
1da177e4 3871 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3872 /* Update the field, and then ring the doorbell */
3873 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3874 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3875
3876 /* under certain very rare conditions, this can take awhile.
3877 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3878 * as we enter this code.) */
7c832835 3879 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3880 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3881 break;
3882 /* delay and try again */
3883 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3884 schedule_timeout(msecs_to_jiffies(1));
7c832835 3885 }
1da177e4
LT		 3886
3887#ifdef CCISS_DEBUG
7c832835
BH		 3888 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3889 readl(c->vaddr + SA5_DOORBELL));
3890#endif /* CCISS_DEBUG */
1da177e4 3891#ifdef CCISS_DEBUG
7c832835
BH		 3892 print_cfg_table(c->cfgtable);
3893#endif /* CCISS_DEBUG */
1da177e4 3894
7c832835 3895 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3896 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3897 " simple mode\n");
c33ac89b 3898 err = -ENODEV;
4e570309 3899 goto err_out_free_res;
1da177e4
LT		 3900 }
3901 return 0;
3902
5faad620 3903err_out_free_res:
872225ca
MM		 3904 /*
3905 * Deliberately omit pci_disable_device(): it does something nasty to
3906 * Smart Array controllers that pci_enable_device does not undo
3907 */
4e570309 3908 pci_release_regions(pdev);
c33ac89b 3909 return err;
1da177e4
LT		 3910}
3911
6ae5ce8e
MM		 3912/* Function to find the first free pointer into our hba[] array
3913 * Returns -1 if no free entries are left.
7c832835 3914 */
1da177e4
LT		 3915static int alloc_cciss_hba(void)
3916{
799202cb 3917 int i;
1da177e4 3918
7c832835 3919 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3920 if (!hba[i]) {
3921 ctlr_info_t *p;
f2912a12 3922
06ff37ff 3923 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3924 if (!p)
3925 goto Enomem;
1da177e4
LT		 3926 hba[i] = p;
3927 return i;
3928 }
3929 }
3930 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3931 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3932 return -1;
3933Enomem:
1da177e4 3934 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3935 return -1;
3936}
3937
2c935593 3938static void free_hba(int n)
1da177e4 3939{
2c935593
SC		 3940 ctlr_info_t *h = hba[n];
3941 int i;
1da177e4 3942
2c935593
SC		 3943 hba[n] = NULL;
3944 for (i = 0; i < h->highest_lun + 1; i++)
3945 if (h->gendisk[i] != NULL)
3946 put_disk(h->gendisk[i]);
3947 kfree(h);
1da177e4
LT		 3948}
3949
82eb03cf
CC		 3950/* Send a message CDB to the firmware. */
3951static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3952{
3953 typedef struct {
3954 CommandListHeader_struct CommandHeader;
3955 RequestBlock_struct Request;
3956 ErrDescriptor_struct ErrorDescriptor;
3957 } Command;
3958 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3959 Command *cmd;
3960 dma_addr_t paddr64;
3961 uint32_t paddr32, tag;
3962 void __iomem *vaddr;
3963 int i, err;
3964
3965 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3966 if (vaddr == NULL)
3967 return -ENOMEM;
3968
3969 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3970 CCISS commands, so they must be allocated from the lower 4GiB of
3971 memory. */
e930438c 3972 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3973 if (err) {
3974 iounmap(vaddr);
3975 return -ENOMEM;
3976 }
3977
3978 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3979 if (cmd == NULL) {
3980 iounmap(vaddr);
3981 return -ENOMEM;
3982 }
3983
3984 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3985 although there's no guarantee, we assume that the address is at
3986 least 4-byte aligned (most likely, it's page-aligned). */
3987 paddr32 = paddr64;
3988
3989 cmd->CommandHeader.ReplyQueue = 0;
3990 cmd->CommandHeader.SGList = 0;
3991 cmd->CommandHeader.SGTotal = 0;
3992 cmd->CommandHeader.Tag.lower = paddr32;
3993 cmd->CommandHeader.Tag.upper = 0;
3994 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3995
3996 cmd->Request.CDBLen = 16;
3997 cmd->Request.Type.Type = TYPE_MSG;
3998 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3999 cmd->Request.Type.Direction = XFER_NONE;
4000 cmd->Request.Timeout = 0; /* Don't time out */
4001 cmd->Request.CDB[0] = opcode;
4002 cmd->Request.CDB[1] = type;
4003 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4004
4005 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4006 cmd->ErrorDescriptor.Addr.upper = 0;
4007 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4008
4009 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4010
4011 for (i = 0; i < 10; i++) {
4012 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4013 if ((tag & ~3) == paddr32)
4014 break;
4015 schedule_timeout_uninterruptible(HZ);
4016 }
4017
4018 iounmap(vaddr);
4019
4020 /* we leak the DMA buffer here ... no choice since the controller could
4021 still complete the command. */
4022 if (i == 10) {
4023 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4024 opcode, type);
4025 return -ETIMEDOUT;
4026 }
4027
4028 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4029
4030 if (tag & 2) {
4031 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4032 opcode, type);
4033 return -EIO;
4034 }
4035
4036 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4037 opcode, type);
4038 return 0;
4039}
4040
4041#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4042#define cciss_noop(p) cciss_message(p, 3, 0)
4043
4044static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4045{
4046/* the #defines are stolen from drivers/pci/msi.h. */
4047#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4048#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4049
4050 int pos;
4051 u16 control = 0;
4052
4053 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4054 if (pos) {
4055 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4056 if (control & PCI_MSI_FLAGS_ENABLE) {
4057 printk(KERN_INFO "cciss: resetting MSI\n");
4058 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4059 }
4060 }
4061
4062 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4063 if (pos) {
4064 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4065 if (control & PCI_MSIX_FLAGS_ENABLE) {
4066 printk(KERN_INFO "cciss: resetting MSI-X\n");
4067 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4068 }
4069 }
4070
4071 return 0;
4072}
4073
4074/* This does a hard reset of the controller using PCI power management
4075 * states. */
4076static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4077{
4078 u16 pmcsr, saved_config_space[32];
4079 int i, pos;
4080
4081 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4082
4083 /* This is very nearly the same thing as
4084
4085 pci_save_state(pci_dev);
4086 pci_set_power_state(pci_dev, PCI_D3hot);
4087 pci_set_power_state(pci_dev, PCI_D0);
4088 pci_restore_state(pci_dev);
4089
4090 but we can't use these nice canned kernel routines on
4091 kexec, because they also check the MSI/MSI-X state in PCI
4092 configuration space and do the wrong thing when it is
4093 set/cleared. Also, the pci_save/restore_state functions
4094 violate the ordering requirements for restoring the
4095 configuration space from the CCISS document (see the
4096 comment below). So we roll our own .... */
4097
4098 for (i = 0; i < 32; i++)
4099 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4100
4101 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4102 if (pos == 0) {
4103 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4104 return -ENODEV;
4105 }
4106
4107 /* Quoting from the Open CISS Specification: "The Power
4108 * Management Control/Status Register (CSR) controls the power
4109 * state of the device. The normal operating state is D0,
4110 * CSR=00h. The software off state is D3, CSR=03h. To reset
4111 * the controller, place the interface device in D3 then to
4112 * D0, this causes a secondary PCI reset which will reset the
4113 * controller." */
4114
4115 /* enter the D3hot power management state */
4116 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4117 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4118 pmcsr |= PCI_D3hot;
4119 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4120
4121 schedule_timeout_uninterruptible(HZ >> 1);
4122
4123 /* enter the D0 power management state */
4124 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4125 pmcsr |= PCI_D0;
4126 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4127
4128 schedule_timeout_uninterruptible(HZ >> 1);
4129
4130 /* Restore the PCI configuration space. The Open CISS
4131 * Specification says, "Restore the PCI Configuration
4132 * Registers, offsets 00h through 60h. It is important to
4133 * restore the command register, 16-bits at offset 04h,
4134 * last. Do not restore the configuration status register,
4135 * 16-bits at offset 06h." Note that the offset is 2*i. */
4136 for (i = 0; i < 32; i++) {
4137 if (i == 2 || i == 3)
4138 continue;
4139 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4140 }
4141 wmb();
4142 pci_write_config_word(pdev, 4, saved_config_space[2]);
4143
4144 return 0;
4145}
4146
1da177e4
LT		 4147/*
4148 * This is it. Find all the controllers and register them. I really hate
4149 * stealing all these major device numbers.
4150 * returns the number of block devices registered.
4151 */
4152static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4153 const struct pci_device_id *ent)
1da177e4 4154{
1da177e4 4155 int i;
799202cb 4156 int j = 0;
5c07a311 4157 int k = 0;
1da177e4 4158 int rc;
22bece00 4159 int dac, return_code;
212a5026 4160 InquiryData_struct *inq_buff;
1da177e4 4161
82eb03cf
CC		 4162 if (reset_devices) {
4163 /* Reset the controller with a PCI power-cycle */
4164 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4165 return -ENODEV;
4166
5e18cfd0
JA		 4167 /* Now try to get the controller to respond to a no-op. Some
4168 devices (notably the HP Smart Array 5i Controller) need
4169 up to 30 seconds to respond. */
5e4c91c8 4170 for (i=0; i<30; i++) {
82eb03cf
CC		 4171 if (cciss_noop(pdev) == 0)
4172 break;
5e4c91c8
JA		 4173
4174 schedule_timeout_uninterruptible(HZ);
4175 }
4176 if (i == 30) {
4177 printk(KERN_ERR "cciss: controller seems dead\n");
4178 return -EBUSY;
82eb03cf
CC		 4179 }
4180 }
4181
1da177e4 4182 i = alloc_cciss_hba();
7c832835 4183 if (i < 0)
e2019b58 4184 return -1;
1f8ef380
MM		 4185
4186 hba[i]->busy_initializing = 1;
8a3173de
JA		 4187 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4188 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4189 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4190
1da177e4 4191 if (cciss_pci_init(hba[i], pdev) != 0)
2cfa948c 4192 goto clean_no_release_regions;
1da177e4
LT		 4193
4194 sprintf(hba[i]->devname, "cciss%d", i);
4195 hba[i]->ctlr = i;
4196 hba[i]->pdev = pdev;
4197
b368c9dd
AP		 4198 init_completion(&hba[i]->scan_wait);
4199
7fe06326
AP		 4200 if (cciss_create_hba_sysfs_entry(hba[i]))
4201 goto clean0;
4202
1da177e4 4203 /* configure PCI DMA stuff */
6a35528a 4204 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4205 dac = 1;
284901a9 4206 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4207 dac = 0;
1da177e4 4208 else {
40aabb58 4209 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4210 goto clean1;
4211 }
4212
4213 /*
4214 * register with the major number, or get a dynamic major number
4215 * by passing 0 as argument. This is done for greater than
4216 * 8 controller support.
4217 */
4218 if (i < MAX_CTLR_ORIG)
564de74a 4219 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4220 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4221 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4222 printk(KERN_ERR
7c832835
BH		 4223 "cciss: Unable to get major number %d for %s "
4224 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4225 goto clean1;
7c832835 4226 } else {
1da177e4
LT		 4227 if (i >= MAX_CTLR_ORIG)
4228 hba[i]->major = rc;
4229 }
4230
4231 /* make sure the board interrupts are off */
4232 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4233 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4234 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4235 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4236 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4237 goto clean2;
4238 }
40aabb58
BH		 4239
4240 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4241 hba[i]->devname, pdev->device, pci_name(pdev),
4242 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4243
4244 hba[i]->cmd_pool_bits =
061837bc
JL		 4245 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4246 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4247 hba[i]->cmd_pool = (CommandList_struct *)
4248 pci_alloc_consistent(hba[i]->pdev,
f880632f 4249 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4250 &(hba[i]->cmd_pool_dhandle));
4251 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4252 pci_alloc_consistent(hba[i]->pdev,
f880632f 4253 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4254 &(hba[i]->errinfo_pool_dhandle));
4255 if ((hba[i]->cmd_pool_bits == NULL)
4256 || (hba[i]->cmd_pool == NULL)
4257 || (hba[i]->errinfo_pool == NULL)) {
4258 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4259 goto clean4;
4260 }
5c07a311
DB		 4261
4262 /* Need space for temp scatter list */
4263 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4264 sizeof(struct scatterlist *),
4265 GFP_KERNEL);
4266 for (k = 0; k < hba[i]->nr_cmds; k++) {
4267 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4268 hba[i]->maxsgentries,
4269 GFP_KERNEL);
4270 if (hba[i]->scatter_list[k] == NULL) {
4271 printk(KERN_ERR "cciss%d: could not allocate "
4272 "s/g lists\n", i);
4273 goto clean4;
4274 }
4275 }
49fc5601
SC		 4276 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
4277 hba[i]->chainsize, hba[i]->nr_cmds);
4278 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
5c07a311 4279 goto clean4;
5c07a311 4280
1da177e4 4281 spin_lock_init(&hba[i]->lock);
1da177e4 4282
7c832835
BH		 4283 /* Initialize the pdev driver private data.
4284 have it point to hba[i]. */
1da177e4 4285 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4286 /* command and error info recs zeroed out before
4287 they are used */
4288 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4289 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4290 * sizeof(unsigned long));
1da177e4 4291
6ae5ce8e
MM		 4292 hba[i]->num_luns = 0;
4293 hba[i]->highest_lun = -1;
4294 for (j = 0; j < CISS_MAX_LUN; j++) {
9cef0d2f 4295 hba[i]->drv[j] = NULL;
6ae5ce8e
MM		 4296 hba[i]->gendisk[j] = NULL;
4297 }
1da177e4
LT		 4298
4299 cciss_scsi_setup(i);
4300
4301 /* Turn the interrupts on so we can service requests */
4302 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4303
22bece00
MM		 4304 /* Get the firmware version */
4305 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4306 if (inq_buff == NULL) {
4307 printk(KERN_ERR "cciss: out of memory\n");
4308 goto clean4;
4309 }
4310
4311 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4312 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4313 if (return_code == IO_OK) {
4314 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4315 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4316 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4317 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4318 } else { /* send command failed */
4319 printk(KERN_WARNING "cciss: unable to determine firmware"
4320 " version of controller\n");
4321 }
212a5026 4322 kfree(inq_buff);
22bece00 4323
1da177e4 4324 cciss_procinit(i);
92c4231a 4325
5c07a311 4326 hba[i]->cciss_max_sectors = 8192;
92c4231a 4327
2d11d993 4328 rebuild_lun_table(hba[i], 1, 0);
d6dbf42e 4329 hba[i]->busy_initializing = 0;
e2019b58 4330 return 1;
1da177e4 4331
6ae5ce8e 4332clean4:
6044ec88 4333 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4334 /* Free up sg elements */
4335 for (k = 0; k < hba[i]->nr_cmds; k++)
4336 kfree(hba[i]->scatter_list[k]);
4337 kfree(hba[i]->scatter_list);
49fc5601 4338 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
7c832835 4339 if (hba[i]->cmd_pool)
1da177e4 4340 pci_free_consistent(hba[i]->pdev,
f880632f 4341 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4342 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4343 if (hba[i]->errinfo_pool)
1da177e4 4344 pci_free_consistent(hba[i]->pdev,
f880632f 4345 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4346 hba[i]->errinfo_pool,
4347 hba[i]->errinfo_pool_dhandle);
fb86a35b 4348 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4349clean2:
1da177e4 4350 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4351clean1:
7fe06326
AP		 4352 cciss_destroy_hba_sysfs_entry(hba[i]);
4353clean0:
2cfa948c
SC		 4354 pci_release_regions(pdev);
4355clean_no_release_regions:
1f8ef380 4356 hba[i]->busy_initializing = 0;
9cef0d2f 4357
872225ca
MM		 4358 /*
4359 * Deliberately omit pci_disable_device(): it does something nasty to
4360 * Smart Array controllers that pci_enable_device does not undo
4361 */
799202cb 4362 pci_set_drvdata(pdev, NULL);
61808c2b 4363 free_hba(i);
e2019b58 4364 return -1;
1da177e4
LT		 4365}
4366
e9ca75b5 4367static void cciss_shutdown(struct pci_dev *pdev)
1da177e4 4368{
29009a03
SC		 4369 ctlr_info_t *h;
4370 char *flush_buf;
7c832835 4371 int return_code;
1da177e4 4372
29009a03
SC		 4373 h = pci_get_drvdata(pdev);
4374 flush_buf = kzalloc(4, GFP_KERNEL);
4375 if (!flush_buf) {
4376 printk(KERN_WARNING
4377 "cciss:%d cache not flushed, out of memory.\n",
4378 h->ctlr);
e9ca75b5 4379 return;
e9ca75b5 4380 }
29009a03
SC		 4381 /* write all data in the battery backed cache to disk */
4382 memset(flush_buf, 0, 4);
4383 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4384 4, 0, CTLR_LUNID, TYPE_CMD);
4385 kfree(flush_buf);
4386 if (return_code != IO_OK)
4387 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4388 h->ctlr);
4389 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4390 free_irq(h->intr[2], h);
e9ca75b5
GB		 4391}
4392
4393static void __devexit cciss_remove_one(struct pci_dev *pdev)
4394{
4395 ctlr_info_t *tmp_ptr;
4396 int i, j;
4397
7c832835
BH		 4398 if (pci_get_drvdata(pdev) == NULL) {
4399 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4400 return;
4401 }
0a9279cc 4402
1da177e4
LT		 4403 tmp_ptr = pci_get_drvdata(pdev);
4404 i = tmp_ptr->ctlr;
7c832835 4405 if (hba[i] == NULL) {
1da177e4 4406 printk(KERN_ERR "cciss: device appears to "
7c832835 4407 "already be removed \n");
1da177e4
LT		 4408 return;
4409 }
b6550777 4410
b368c9dd 4411 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4412
b368c9dd 4413 remove_from_scan_list(hba[i]);
b6550777
BH		 4414 remove_proc_entry(hba[i]->devname, proc_cciss);
4415 unregister_blkdev(hba[i]->major, hba[i]->devname);
4416
4417 /* remove it from the disk list */
4418 for (j = 0; j < CISS_MAX_LUN; j++) {
4419 struct gendisk *disk = hba[i]->gendisk[j];
4420 if (disk) {
165125e1 4421 struct request_queue *q = disk->queue;
b6550777 4422
097d0264 4423 if (disk->flags & GENHD_FL_UP) {
8ce51966 4424 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4425 del_gendisk(disk);
097d0264 4426 }
b6550777
BH		 4427 if (q)
4428 blk_cleanup_queue(q);
4429 }
4430 }
4431
ba198efb 4432#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4433 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4434#endif
b6550777 4435
e9ca75b5 4436 cciss_shutdown(pdev);
fb86a35b
MM		 4437
4438#ifdef CONFIG_PCI_MSI
7c832835
BH		 4439 if (hba[i]->msix_vector)
4440 pci_disable_msix(hba[i]->pdev);
4441 else if (hba[i]->msi_vector)
4442 pci_disable_msi(hba[i]->pdev);
4443#endif /* CONFIG_PCI_MSI */
fb86a35b 4444
1da177e4 4445 iounmap(hba[i]->vaddr);
1da177e4 4446
f880632f 4447 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4448 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4449 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4450 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4451 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4452 /* Free up sg elements */
4453 for (j = 0; j < hba[i]->nr_cmds; j++)
4454 kfree(hba[i]->scatter_list[j]);
4455 kfree(hba[i]->scatter_list);
49fc5601 4456 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
872225ca
MM		 4457 /*
4458 * Deliberately omit pci_disable_device(): it does something nasty to
4459 * Smart Array controllers that pci_enable_device does not undo
4460 */
7c832835 4461 pci_release_regions(pdev);
4e570309 4462 pci_set_drvdata(pdev, NULL);
7fe06326 4463 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4464 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4465 free_hba(i);
7c832835 4466}
1da177e4
LT		 4467
4468static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4469 .name = "cciss",
4470 .probe = cciss_init_one,
4471 .remove = __devexit_p(cciss_remove_one),
4472 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4473 .shutdown = cciss_shutdown,
1da177e4
LT		 4474};
4475
4476/*
4477 * This is it. Register the PCI driver information for the cards we control
7c832835 4478 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4479 */
4480static int __init cciss_init(void)
4481{
7fe06326
AP		 4482 int err;
4483
10cbda97
JA		 4484 /*
4485 * The hardware requires that commands are aligned on a 64-bit
4486 * boundary. Given that we use pci_alloc_consistent() to allocate an
4487 * array of them, the size must be a multiple of 8 bytes.
4488 */
1b7d0d28 4489 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
10cbda97 4490
1da177e4
LT		 4491 printk(KERN_INFO DRIVER_NAME "\n");
4492
7fe06326
AP		 4493 err = bus_register(&cciss_bus_type);
4494 if (err)
4495 return err;
4496
b368c9dd
AP		 4497 /* Start the scan thread */
4498 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4499 if (IS_ERR(cciss_scan_thread)) {
4500 err = PTR_ERR(cciss_scan_thread);
4501 goto err_bus_unregister;
4502 }
4503
1da177e4 4504 /* Register for our PCI devices */
7fe06326
AP		 4505 err = pci_register_driver(&cciss_pci_driver);
4506 if (err)
b368c9dd 4507 goto err_thread_stop;
7fe06326 4508
617e1344 4509 return err;
7fe06326 4510
b368c9dd
AP		 4511err_thread_stop:
4512 kthread_stop(cciss_scan_thread);
4513err_bus_unregister:
7fe06326 4514 bus_unregister(&cciss_bus_type);
b368c9dd 4515
7fe06326 4516 return err;
1da177e4
LT		 4517}
4518
4519static void __exit cciss_cleanup(void)
4520{
4521 int i;
4522
4523 pci_unregister_driver(&cciss_pci_driver);
4524 /* double check that all controller entrys have been removed */
7c832835
BH		 4525 for (i = 0; i < MAX_CTLR; i++) {
4526 if (hba[i] != NULL) {
1da177e4 4527 printk(KERN_WARNING "cciss: had to remove"
7c832835 4528 " controller %d\n", i);
1da177e4
LT		 4529 cciss_remove_one(hba[i]->pdev);
4530 }
4531 }
b368c9dd 4532 kthread_stop(cciss_scan_thread);
928b4d8c 4533 remove_proc_entry("driver/cciss", NULL);
7fe06326 4534 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4535}
4536
33079b21
MM		 4537static void fail_all_cmds(unsigned long ctlr)
4538{
4539 /* If we get here, the board is apparently dead. */
4540 ctlr_info_t *h = hba[ctlr];
4541 CommandList_struct *c;
4542 unsigned long flags;
4543
4544 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4545 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4546
4547 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4548
7c832835 4549 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4550
4551 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4552 while (!hlist_empty(&h->reqQ)) {
4553 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4554 removeQ(c);
33079b21 4555 h->Qdepth--;
8a3173de 4556 addQ(&h->cmpQ, c);
33079b21
MM		 4557 }
4558
4559 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4560 while (!hlist_empty(&h->cmpQ)) {
4561 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4562 removeQ(c);
b59e64d0
HR		 4563 if (c->cmd_type != CMD_MSG_STALE)
4564 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4565 if (c->cmd_type == CMD_RWREQ) {
4566 complete_command(h, c, 0);
4567 } else if (c->cmd_type == CMD_IOCTL_PEND)
4568 complete(c->waiting);
4569#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4570 else if (c->cmd_type == CMD_SCSI)
4571 complete_scsi_command(c, 0, 0);
33079b21
MM		 4572#endif
4573 }
4574 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4575 return;
4576}
4577
1da177e4
LT		 4578module_init(cciss_init);
4579module_exit(cciss_cleanup);
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