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cciss: factor out scatter gather chain block allocation and freeing
[deliverable/linux.git] / drivers / block / cciss.c
CommitLineData
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
49fc5601
SC		 260static void cciss_free_sg_chain_blocks(struct Cmd_sg_list **cmd_sg_list,
261 int nr_cmds)
262{
263 int i;
264
265 if (!cmd_sg_list)
266 return;
267 for (i = 0; i < nr_cmds; i++) {
268 if (cmd_sg_list[i]) {
269 kfree(cmd_sg_list[i]->sgchain);
270 kfree(cmd_sg_list[i]);
271 cmd_sg_list[i] = NULL;
272 }
273 }
274 kfree(cmd_sg_list);
275}
276
277static struct Cmd_sg_list **cciss_allocate_sg_chain_blocks(ctlr_info_t *h,
278 int chainsize, int nr_cmds)
279{
280 int j;
281 struct Cmd_sg_list **cmd_sg_list;
282
283 if (chainsize <= 0)
284 return NULL;
285
286 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
287 if (!cmd_sg_list)
288 return NULL;
289
290 /* Build up chain blocks for each command */
291 for (j = 0; j < nr_cmds; j++) {
292 cmd_sg_list[j] = kmalloc(sizeof(*cmd_sg_list[j]), GFP_KERNEL);
293 if (!cmd_sg_list[j]) {
294 dev_err(&h->pdev->dev, "Cannot get memory "
295 "for chain block.\n");
296 goto clean;
297 }
298 /* Need a block of chainsized s/g elements. */
299 cmd_sg_list[j]->sgchain = kmalloc((chainsize *
300 sizeof(SGDescriptor_struct)), GFP_KERNEL);
301 if (!cmd_sg_list[j]->sgchain) {
302 dev_err(&h->pdev->dev, "Cannot get memory "
303 "for s/g chains.\n");
304 goto clean;
305 }
306 }
307 return cmd_sg_list;
308clean:
309 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
310 return NULL;
311}
312
1da177e4
LT		 313#include "cciss_scsi.c" /* For SCSI tape support */
314
1e6f2dc1
AB		 315static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
316 "UNKNOWN"
317};
318#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
0f5486ec 319
1da177e4
LT		 320#ifdef CONFIG_PROC_FS
321
322/*
323 * Report information about this controller.
324 */
325#define ENG_GIG 1000000000
326#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 327#define ENGAGE_SCSI "engage scsi"
1da177e4
LT		 328
329static struct proc_dir_entry *proc_cciss;
330
89b6e743 331static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 332{
89b6e743
MM		 333 ctlr_info_t *h = seq->private;
334
335 seq_printf(seq, "%s: HP %s Controller\n"
336 "Board ID: 0x%08lx\n"
337 "Firmware Version: %c%c%c%c\n"
338 "IRQ: %d\n"
339 "Logical drives: %d\n"
340 "Current Q depth: %d\n"
341 "Current # commands on controller: %d\n"
342 "Max Q depth since init: %d\n"
343 "Max # commands on controller since init: %d\n"
344 "Max SG entries since init: %d\n",
345 h->devname,
346 h->product_name,
347 (unsigned long)h->board_id,
348 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
349 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
350 h->num_luns,
351 h->Qdepth, h->commands_outstanding,
352 h->maxQsinceinit, h->max_outstanding, h->maxSG);
353
354#ifdef CONFIG_CISS_SCSI_TAPE
355 cciss_seq_tape_report(seq, h->ctlr);
356#endif /* CONFIG_CISS_SCSI_TAPE */
357}
1da177e4 358
89b6e743
MM		 359static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
360{
361 ctlr_info_t *h = seq->private;
362 unsigned ctlr = h->ctlr;
363 unsigned long flags;
1da177e4
LT		 364
365 /* prevent displaying bogus info during configuration
366 * or deconfiguration of a logical volume
367 */
368 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
369 if (h->busy_configuring) {
370 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 371 return ERR_PTR(-EBUSY);
1da177e4
LT		 372 }
373 h->busy_configuring = 1;
374 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
375
89b6e743
MM		 376 if (*pos == 0)
377 cciss_seq_show_header(seq);
378
379 return pos;
380}
381
382static int cciss_seq_show(struct seq_file *seq, void *v)
383{
384 sector_t vol_sz, vol_sz_frac;
385 ctlr_info_t *h = seq->private;
386 unsigned ctlr = h->ctlr;
387 loff_t *pos = v;
9cef0d2f 388 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 389
390 if (*pos > h->highest_lun)
391 return 0;
392
531c2dc7
SC		 393 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
394 return 0;
395
89b6e743
MM		 396 if (drv->heads == 0)
397 return 0;
398
399 vol_sz = drv->nr_blocks;
400 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
401 vol_sz_frac *= 100;
402 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
403
fa52bec9 404 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 405 drv->raid_level = RAID_UNKNOWN;
406 seq_printf(seq, "cciss/c%dd%d:"
407 "\t%4u.%02uGB\tRAID %s\n",
408 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
409 raid_label[drv->raid_level]);
410 return 0;
411}
412
413static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
414{
415 ctlr_info_t *h = seq->private;
416
417 if (*pos > h->highest_lun)
418 return NULL;
419 *pos += 1;
420
421 return pos;
422}
423
424static void cciss_seq_stop(struct seq_file *seq, void *v)
425{
426 ctlr_info_t *h = seq->private;
427
428 /* Only reset h->busy_configuring if we succeeded in setting
429 * it during cciss_seq_start. */
430 if (v == ERR_PTR(-EBUSY))
431 return;
7c832835 432
1da177e4 433 h->busy_configuring = 0;
1da177e4
LT		 434}
435
88e9d34c 436static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 437 .start = cciss_seq_start,
438 .show = cciss_seq_show,
439 .next = cciss_seq_next,
440 .stop = cciss_seq_stop,
441};
442
443static int cciss_seq_open(struct inode *inode, struct file *file)
444{
445 int ret = seq_open(file, &cciss_seq_ops);
446 struct seq_file *seq = file->private_data;
447
448 if (!ret)
449 seq->private = PDE(inode)->data;
450
451 return ret;
452}
453
454static ssize_t
455cciss_proc_write(struct file *file, const char __user *buf,
456 size_t length, loff_t *ppos)
1da177e4 457{
89b6e743
MM		 458 int err;
459 char *buffer;
460
461#ifndef CONFIG_CISS_SCSI_TAPE
462 return -EINVAL;
1da177e4
LT		 463#endif
464
89b6e743 465 if (!buf || length > PAGE_SIZE - 1)
7c832835 466 return -EINVAL;
89b6e743
MM		 467
468 buffer = (char *)__get_free_page(GFP_KERNEL);
469 if (!buffer)
470 return -ENOMEM;
471
472 err = -EFAULT;
473 if (copy_from_user(buffer, buf, length))
474 goto out;
475 buffer[length] = '\0';
476
477#ifdef CONFIG_CISS_SCSI_TAPE
478 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
479 struct seq_file *seq = file->private_data;
480 ctlr_info_t *h = seq->private;
89b6e743 481
8721c81f
SC		 482 err = cciss_engage_scsi(h->ctlr);
483 if (err == 0)
89b6e743
MM		 484 err = length;
485 } else
486#endif /* CONFIG_CISS_SCSI_TAPE */
487 err = -EINVAL;
7c832835
BH		 488 /* might be nice to have "disengage" too, but it's not
489 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 490
491out:
492 free_page((unsigned long)buffer);
493 return err;
1da177e4
LT		 494}
495
828c0950 496static const struct file_operations cciss_proc_fops = {
89b6e743
MM		 497 .owner = THIS_MODULE,
498 .open = cciss_seq_open,
499 .read = seq_read,
500 .llseek = seq_lseek,
501 .release = seq_release,
502 .write = cciss_proc_write,
503};
504
1da177e4
LT		 505static void __devinit cciss_procinit(int i)
506{
507 struct proc_dir_entry *pde;
508
89b6e743 509 if (proc_cciss == NULL)
928b4d8c 510 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 511 if (!proc_cciss)
512 return;
3dfcf9c4 513 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 514 S_IROTH, proc_cciss,
3dfcf9c4 515 &cciss_proc_fops, hba[i]);
1da177e4 516}
7c832835 517#endif /* CONFIG_PROC_FS */
1da177e4 518
7fe06326
AP		 519#define MAX_PRODUCT_NAME_LEN 19
520
521#define to_hba(n) container_of(n, struct ctlr_info, dev)
522#define to_drv(n) container_of(n, drive_info_struct, dev)
523
d6f4965d
AP		 524static ssize_t host_store_rescan(struct device *dev,
525 struct device_attribute *attr,
526 const char *buf, size_t count)
527{
528 struct ctlr_info *h = to_hba(dev);
529
530 add_to_scan_list(h);
531 wake_up_process(cciss_scan_thread);
532 wait_for_completion_interruptible(&h->scan_wait);
533
534 return count;
535}
8ba95c69 536static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 537
538static ssize_t dev_show_unique_id(struct device *dev,
539 struct device_attribute *attr,
540 char *buf)
541{
542 drive_info_struct *drv = to_drv(dev);
543 struct ctlr_info *h = to_hba(drv->dev.parent);
544 __u8 sn[16];
545 unsigned long flags;
546 int ret = 0;
547
548 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
549 if (h->busy_configuring)
550 ret = -EBUSY;
551 else
552 memcpy(sn, drv->serial_no, sizeof(sn));
553 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
554
555 if (ret)
556 return ret;
557 else
558 return snprintf(buf, 16 * 2 + 2,
559 "%02X%02X%02X%02X%02X%02X%02X%02X"
560 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
561 sn[0], sn[1], sn[2], sn[3],
562 sn[4], sn[5], sn[6], sn[7],
563 sn[8], sn[9], sn[10], sn[11],
564 sn[12], sn[13], sn[14], sn[15]);
565}
8ba95c69 566static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP		 567
568static ssize_t dev_show_vendor(struct device *dev,
569 struct device_attribute *attr,
570 char *buf)
571{
572 drive_info_struct *drv = to_drv(dev);
573 struct ctlr_info *h = to_hba(drv->dev.parent);
574 char vendor[VENDOR_LEN + 1];
575 unsigned long flags;
576 int ret = 0;
577
578 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
579 if (h->busy_configuring)
580 ret = -EBUSY;
581 else
582 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
583 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
584
585 if (ret)
586 return ret;
587 else
588 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
589}
8ba95c69 590static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP		 591
592static ssize_t dev_show_model(struct device *dev,
593 struct device_attribute *attr,
594 char *buf)
595{
596 drive_info_struct *drv = to_drv(dev);
597 struct ctlr_info *h = to_hba(drv->dev.parent);
598 char model[MODEL_LEN + 1];
599 unsigned long flags;
600 int ret = 0;
601
602 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
603 if (h->busy_configuring)
604 ret = -EBUSY;
605 else
606 memcpy(model, drv->model, MODEL_LEN + 1);
607 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
608
609 if (ret)
610 return ret;
611 else
612 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
613}
8ba95c69 614static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP		 615
616static ssize_t dev_show_rev(struct device *dev,
617 struct device_attribute *attr,
618 char *buf)
619{
620 drive_info_struct *drv = to_drv(dev);
621 struct ctlr_info *h = to_hba(drv->dev.parent);
622 char rev[REV_LEN + 1];
623 unsigned long flags;
624 int ret = 0;
625
626 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
627 if (h->busy_configuring)
628 ret = -EBUSY;
629 else
630 memcpy(rev, drv->rev, REV_LEN + 1);
631 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
632
633 if (ret)
634 return ret;
635 else
636 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
637}
8ba95c69 638static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 639
ce84a8ae
SC		 640static ssize_t cciss_show_lunid(struct device *dev,
641 struct device_attribute *attr, char *buf)
642{
9cef0d2f
SC		 643 drive_info_struct *drv = to_drv(dev);
644 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 645 unsigned long flags;
646 unsigned char lunid[8];
647
648 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
649 if (h->busy_configuring) {
650 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
651 return -EBUSY;
652 }
653 if (!drv->heads) {
654 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
655 return -ENOTTY;
656 }
657 memcpy(lunid, drv->LunID, sizeof(lunid));
658 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
659 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
660 lunid[0], lunid[1], lunid[2], lunid[3],
661 lunid[4], lunid[5], lunid[6], lunid[7]);
662}
8ba95c69 663static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 664
3ff1111d
SC		 665static ssize_t cciss_show_raid_level(struct device *dev,
666 struct device_attribute *attr, char *buf)
667{
9cef0d2f
SC		 668 drive_info_struct *drv = to_drv(dev);
669 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 670 int raid;
671 unsigned long flags;
672
673 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
674 if (h->busy_configuring) {
675 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
676 return -EBUSY;
677 }
678 raid = drv->raid_level;
679 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
680 if (raid < 0 || raid > RAID_UNKNOWN)
681 raid = RAID_UNKNOWN;
682
683 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
684 raid_label[raid]);
685}
8ba95c69 686static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 687
e272afec
SC		 688static ssize_t cciss_show_usage_count(struct device *dev,
689 struct device_attribute *attr, char *buf)
690{
9cef0d2f
SC		 691 drive_info_struct *drv = to_drv(dev);
692 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 693 unsigned long flags;
694 int count;
695
696 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
697 if (h->busy_configuring) {
698 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
699 return -EBUSY;
700 }
701 count = drv->usage_count;
702 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
703 return snprintf(buf, 20, "%d\n", count);
704}
8ba95c69 705static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 706
d6f4965d
AP		 707static struct attribute *cciss_host_attrs[] = {
708 &dev_attr_rescan.attr,
709 NULL
710};
711
712static struct attribute_group cciss_host_attr_group = {
713 .attrs = cciss_host_attrs,
714};
715
9f792d9f 716static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP		 717 &cciss_host_attr_group,
718 NULL
719};
720
721static struct device_type cciss_host_type = {
722 .name = "cciss_host",
723 .groups = cciss_host_attr_groups,
617e1344 724 .release = cciss_hba_release,
d6f4965d
AP		 725};
726
7fe06326
AP		 727static struct attribute *cciss_dev_attrs[] = {
728 &dev_attr_unique_id.attr,
729 &dev_attr_model.attr,
730 &dev_attr_vendor.attr,
731 &dev_attr_rev.attr,
ce84a8ae 732 &dev_attr_lunid.attr,
3ff1111d 733 &dev_attr_raid_level.attr,
e272afec 734 &dev_attr_usage_count.attr,
7fe06326
AP		 735 NULL
736};
737
738static struct attribute_group cciss_dev_attr_group = {
739 .attrs = cciss_dev_attrs,
740};
741
a4dbd674 742static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 743 &cciss_dev_attr_group,
744 NULL
745};
746
747static struct device_type cciss_dev_type = {
748 .name = "cciss_device",
749 .groups = cciss_dev_attr_groups,
617e1344 750 .release = cciss_device_release,
7fe06326
AP		 751};
752
753static struct bus_type cciss_bus_type = {
754 .name = "cciss",
755};
756
617e1344
SC		 757/*
758 * cciss_hba_release is called when the reference count
759 * of h->dev goes to zero.
760 */
761static void cciss_hba_release(struct device *dev)
762{
763 /*
764 * nothing to do, but need this to avoid a warning
765 * about not having a release handler from lib/kref.c.
766 */
767}
7fe06326
AP		 768
769/*
770 * Initialize sysfs entry for each controller. This sets up and registers
771 * the 'cciss#' directory for each individual controller under
772 * /sys/bus/pci/devices/<dev>/.
773 */
774static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
775{
776 device_initialize(&h->dev);
777 h->dev.type = &cciss_host_type;
778 h->dev.bus = &cciss_bus_type;
779 dev_set_name(&h->dev, "%s", h->devname);
780 h->dev.parent = &h->pdev->dev;
781
782 return device_add(&h->dev);
783}
784
785/*
786 * Remove sysfs entries for an hba.
787 */
788static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
789{
790 device_del(&h->dev);
617e1344
SC		 791 put_device(&h->dev); /* final put. */
792}
793
794/* cciss_device_release is called when the reference count
9cef0d2f 795 * of h->drv[x]dev goes to zero.
617e1344
SC		 796 */
797static void cciss_device_release(struct device *dev)
798{
9cef0d2f
SC		 799 drive_info_struct *drv = to_drv(dev);
800 kfree(drv);
7fe06326
AP		 801}
802
803/*
804 * Initialize sysfs for each logical drive. This sets up and registers
805 * the 'c#d#' directory for each individual logical drive under
806 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
807 * /sys/block/cciss!c#d# to this entry.
808 */
617e1344 809static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 810 int drv_index)
811{
617e1344
SC		 812 struct device *dev;
813
9cef0d2f 814 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 815 return 0;
816
9cef0d2f 817 dev = &h->drv[drv_index]->dev;
617e1344
SC		 818 device_initialize(dev);
819 dev->type = &cciss_dev_type;
820 dev->bus = &cciss_bus_type;
821 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
822 dev->parent = &h->dev;
9cef0d2f 823 h->drv[drv_index]->device_initialized = 1;
617e1344 824 return device_add(dev);
7fe06326
AP		 825}
826
827/*
828 * Remove sysfs entries for a logical drive.
829 */
8ce51966
SC		 830static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
831 int ctlr_exiting)
7fe06326 832{
9cef0d2f 833 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 834
835 /* special case for c*d0, we only destroy it on controller exit */
836 if (drv_index == 0 && !ctlr_exiting)
837 return;
838
617e1344
SC		 839 device_del(dev);
840 put_device(dev); /* the "final" put. */
9cef0d2f 841 h->drv[drv_index] = NULL;
7fe06326
AP		 842}
843
7c832835
BH		 844/*
845 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 846 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 847 * which ones are free or in use. For operations that can wait for kmalloc
848 * to possible sleep, this routine can be called with get_from_pool set to 0.
849 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
850 */
851static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 852{
853 CommandList_struct *c;
7c832835 854 int i;
1da177e4
LT		 855 u64bit temp64;
856 dma_addr_t cmd_dma_handle, err_dma_handle;
857
7c832835
BH		 858 if (!get_from_pool) {
859 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
860 sizeof(CommandList_struct), &cmd_dma_handle);
861 if (c == NULL)
862 return NULL;
1da177e4
LT		 863 memset(c, 0, sizeof(CommandList_struct));
864
33079b21
MM		 865 c->cmdindex = -1;
866
7c832835
BH		 867 c->err_info = (ErrorInfo_struct *)
868 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
869 &err_dma_handle);
870
871 if (c->err_info == NULL) {
872 pci_free_consistent(h->pdev,
1da177e4
LT		 873 sizeof(CommandList_struct), c, cmd_dma_handle);
874 return NULL;
875 }
876 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 877 } else { /* get it out of the controllers pool */
878
879 do {
f880632f
MM		 880 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
881 if (i == h->nr_cmds)
7c832835
BH		 882 return NULL;
883 } while (test_and_set_bit
884 (i & (BITS_PER_LONG - 1),
885 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 886#ifdef CCISS_DEBUG
887 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
888#endif
7c832835 889 c = h->cmd_pool + i;
1da177e4 890 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 891 cmd_dma_handle = h->cmd_pool_dhandle
892 + i * sizeof(CommandList_struct);
1da177e4
LT		 893 c->err_info = h->errinfo_pool + i;
894 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 895 err_dma_handle = h->errinfo_pool_dhandle
896 + i * sizeof(ErrorInfo_struct);
897 h->nr_allocs++;
33079b21
MM		 898
899 c->cmdindex = i;
7c832835 900 }
1da177e4 901
8a3173de 902 INIT_HLIST_NODE(&c->list);
1da177e4 903 c->busaddr = (__u32) cmd_dma_handle;
7c832835 904 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 905 c->ErrDesc.Addr.lower = temp64.val32.lower;
906 c->ErrDesc.Addr.upper = temp64.val32.upper;
907 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 908
7c832835
BH		 909 c->ctlr = h->ctlr;
910 return c;
1da177e4
LT		 911}
912
7c832835
BH		 913/*
914 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 915 */
916static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
917{
918 int i;
919 u64bit temp64;
920
7c832835 921 if (!got_from_pool) {
1da177e4
LT		 922 temp64.val32.lower = c->ErrDesc.Addr.lower;
923 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 924 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
925 c->err_info, (dma_addr_t) temp64.val);
926 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
927 c, (dma_addr_t) c->busaddr);
928 } else {
1da177e4 929 i = c - h->cmd_pool;
7c832835
BH		 930 clear_bit(i & (BITS_PER_LONG - 1),
931 h->cmd_pool_bits + (i / BITS_PER_LONG));
932 h->nr_frees++;
933 }
1da177e4
LT		 934}
935
936static inline ctlr_info_t *get_host(struct gendisk *disk)
937{
7c832835 938 return disk->queue->queuedata;
1da177e4
LT		 939}
940
941static inline drive_info_struct *get_drv(struct gendisk *disk)
942{
943 return disk->private_data;
944}
945
946/*
947 * Open. Make sure the device is really there.
948 */
ef7822c2 949static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 950{
ef7822c2
AV		 951 ctlr_info_t *host = get_host(bdev->bd_disk);
952 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 953
954#ifdef CCISS_DEBUG
ef7822c2 955 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 956#endif /* CCISS_DEBUG */
1da177e4 957
2e043986 958 if (drv->busy_configuring)
ddd47442 959 return -EBUSY;
1da177e4
LT		 960 /*
961 * Root is allowed to open raw volume zero even if it's not configured
962 * so array config can still work. Root is also allowed to open any
963 * volume that has a LUN ID, so it can issue IOCTL to reread the
964 * disk information. I don't think I really like this
965 * but I'm already using way to many device nodes to claim another one
966 * for "raw controller".
967 */
7a06f789 968 if (drv->heads == 0) {
ef7822c2 969 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 970 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 971 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 972 return -ENXIO;
1da177e4 973 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 974 } else if (memcmp(drv->LunID, CTLR_LUNID,
975 sizeof(drv->LunID))) {
1da177e4
LT		 976 return -ENXIO;
977 }
978 }
979 if (!capable(CAP_SYS_ADMIN))
980 return -EPERM;
981 }
982 drv->usage_count++;
983 host->usage_count++;
984 return 0;
985}
7c832835 986
1da177e4
LT		 987/*
988 * Close. Sync first.
989 */
ef7822c2 990static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 991{
ef7822c2
AV		 992 ctlr_info_t *host = get_host(disk);
993 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 994
995#ifdef CCISS_DEBUG
ef7822c2 996 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 997#endif /* CCISS_DEBUG */
1da177e4
LT		 998
999 drv->usage_count--;
1000 host->usage_count--;
1001 return 0;
1002}
1003
1004#ifdef CONFIG_COMPAT
1005
ef7822c2
AV		 1006static int do_ioctl(struct block_device *bdev, fmode_t mode,
1007 unsigned cmd, unsigned long arg)
1da177e4
LT		 1008{
1009 int ret;
1010 lock_kernel();
ef7822c2 1011 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1012 unlock_kernel();
1013 return ret;
1014}
1015
ef7822c2
AV		 1016static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1017 unsigned cmd, unsigned long arg);
1018static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1019 unsigned cmd, unsigned long arg);
1da177e4 1020
ef7822c2
AV		 1021static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1022 unsigned cmd, unsigned long arg)
1da177e4
LT		 1023{
1024 switch (cmd) {
1025 case CCISS_GETPCIINFO:
1026 case CCISS_GETINTINFO:
1027 case CCISS_SETINTINFO:
1028 case CCISS_GETNODENAME:
1029 case CCISS_SETNODENAME:
1030 case CCISS_GETHEARTBEAT:
1031 case CCISS_GETBUSTYPES:
1032 case CCISS_GETFIRMVER:
1033 case CCISS_GETDRIVVER:
1034 case CCISS_REVALIDVOLS:
1035 case CCISS_DEREGDISK:
1036 case CCISS_REGNEWDISK:
1037 case CCISS_REGNEWD:
1038 case CCISS_RESCANDISK:
1039 case CCISS_GETLUNINFO:
ef7822c2 1040 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1041
1042 case CCISS_PASSTHRU32:
ef7822c2 1043 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 1044 case CCISS_BIG_PASSTHRU32:
ef7822c2 1045 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 1046
1047 default:
1048 return -ENOIOCTLCMD;
1049 }
1050}
1051
ef7822c2
AV		 1052static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1053 unsigned cmd, unsigned long arg)
1da177e4
LT		 1054{
1055 IOCTL32_Command_struct __user *arg32 =
7c832835 1056 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1057 IOCTL_Command_struct arg64;
1058 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1059 int err;
1060 u32 cp;
1061
1062 err = 0;
7c832835
BH		 1063 err |=
1064 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1065 sizeof(arg64.LUN_info));
1066 err |=
1067 copy_from_user(&arg64.Request, &arg32->Request,
1068 sizeof(arg64.Request));
1069 err |=
1070 copy_from_user(&arg64.error_info, &arg32->error_info,
1071 sizeof(arg64.error_info));
1da177e4
LT		 1072 err |= get_user(arg64.buf_size, &arg32->buf_size);
1073 err |= get_user(cp, &arg32->buf);
1074 arg64.buf = compat_ptr(cp);
1075 err |= copy_to_user(p, &arg64, sizeof(arg64));
1076
1077 if (err)
1078 return -EFAULT;
1079
ef7822c2 1080 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1081 if (err)
1082 return err;
7c832835
BH		 1083 err |=
1084 copy_in_user(&arg32->error_info, &p->error_info,
1085 sizeof(arg32->error_info));
1da177e4
LT		 1086 if (err)
1087 return -EFAULT;
1088 return err;
1089}
1090
ef7822c2
AV		 1091static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1092 unsigned cmd, unsigned long arg)
1da177e4
LT		 1093{
1094 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1095 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1096 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1097 BIG_IOCTL_Command_struct __user *p =
1098 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1099 int err;
1100 u32 cp;
1101
1102 err = 0;
7c832835
BH		 1103 err |=
1104 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1105 sizeof(arg64.LUN_info));
1106 err |=
1107 copy_from_user(&arg64.Request, &arg32->Request,
1108 sizeof(arg64.Request));
1109 err |=
1110 copy_from_user(&arg64.error_info, &arg32->error_info,
1111 sizeof(arg64.error_info));
1da177e4
LT		 1112 err |= get_user(arg64.buf_size, &arg32->buf_size);
1113 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1114 err |= get_user(cp, &arg32->buf);
1115 arg64.buf = compat_ptr(cp);
1116 err |= copy_to_user(p, &arg64, sizeof(arg64));
1117
1118 if (err)
7c832835 1119 return -EFAULT;
1da177e4 1120
ef7822c2 1121 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1122 if (err)
1123 return err;
7c832835
BH		 1124 err |=
1125 copy_in_user(&arg32->error_info, &p->error_info,
1126 sizeof(arg32->error_info));
1da177e4
LT		 1127 if (err)
1128 return -EFAULT;
1129 return err;
1130}
1131#endif
a885c8c4
CH		 1132
1133static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1134{
1135 drive_info_struct *drv = get_drv(bdev->bd_disk);
1136
1137 if (!drv->cylinders)
1138 return -ENXIO;
1139
1140 geo->heads = drv->heads;
1141 geo->sectors = drv->sectors;
1142 geo->cylinders = drv->cylinders;
1143 return 0;
1144}
1145
0a9279cc
MM		 1146static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1147{
1148 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1149 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1150 (void)check_for_unit_attention(host, c);
1151}
1da177e4 1152/*
7c832835 1153 * ioctl
1da177e4 1154 */
ef7822c2 1155static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1156 unsigned int cmd, unsigned long arg)
1da177e4 1157{
1da177e4
LT		 1158 struct gendisk *disk = bdev->bd_disk;
1159 ctlr_info_t *host = get_host(disk);
1160 drive_info_struct *drv = get_drv(disk);
1161 int ctlr = host->ctlr;
1162 void __user *argp = (void __user *)arg;
1163
1164#ifdef CCISS_DEBUG
1165 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1166#endif /* CCISS_DEBUG */
1167
1168 switch (cmd) {
1da177e4 1169 case CCISS_GETPCIINFO:
7c832835
BH		 1170 {
1171 cciss_pci_info_struct pciinfo;
1172
1173 if (!arg)
1174 return -EINVAL;
1175 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1176 pciinfo.bus = host->pdev->bus->number;
1177 pciinfo.dev_fn = host->pdev->devfn;
1178 pciinfo.board_id = host->board_id;
1179 if (copy_to_user
1180 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1181 return -EFAULT;
1182 return 0;
1183 }
1da177e4 1184 case CCISS_GETINTINFO:
7c832835
BH		 1185 {
1186 cciss_coalint_struct intinfo;
1187 if (!arg)
1188 return -EINVAL;
1189 intinfo.delay =
1190 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1191 intinfo.count =
1192 readl(&host->cfgtable->HostWrite.CoalIntCount);
1193 if (copy_to_user
1194 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1195 return -EFAULT;
1196 return 0;
1197 }
1da177e4 1198 case CCISS_SETINTINFO:
1da177e4 1199 {
7c832835
BH		 1200 cciss_coalint_struct intinfo;
1201 unsigned long flags;
1202 int i;
1203
1204 if (!arg)
1205 return -EINVAL;
1206 if (!capable(CAP_SYS_ADMIN))
1207 return -EPERM;
1208 if (copy_from_user
1209 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1210 return -EFAULT;
1211 if ((intinfo.delay == 0) && (intinfo.count == 0))
1212 {
1213// printk("cciss_ioctl: delay and count cannot be 0\n");
1214 return -EINVAL;
1215 }
1216 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1217 /* Update the field, and then ring the doorbell */
1218 writel(intinfo.delay,
1219 &(host->cfgtable->HostWrite.CoalIntDelay));
1220 writel(intinfo.count,
1221 &(host->cfgtable->HostWrite.CoalIntCount));
1222 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1223
1224 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1225 if (!(readl(host->vaddr + SA5_DOORBELL)
1226 & CFGTBL_ChangeReq))
1227 break;
1228 /* delay and try again */
1229 udelay(1000);
1230 }
1231 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1232 if (i >= MAX_IOCTL_CONFIG_WAIT)
1233 return -EAGAIN;
1234 return 0;
1da177e4 1235 }
1da177e4 1236 case CCISS_GETNODENAME:
7c832835
BH		 1237 {
1238 NodeName_type NodeName;
1239 int i;
1240
1241 if (!arg)
1242 return -EINVAL;
1243 for (i = 0; i < 16; i++)
1244 NodeName[i] =
1245 readb(&host->cfgtable->ServerName[i]);
1246 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1247 return -EFAULT;
1248 return 0;
1249 }
1da177e4 1250 case CCISS_SETNODENAME:
7c832835
BH		 1251 {
1252 NodeName_type NodeName;
1253 unsigned long flags;
1254 int i;
1255
1256 if (!arg)
1257 return -EINVAL;
1258 if (!capable(CAP_SYS_ADMIN))
1259 return -EPERM;
1260
1261 if (copy_from_user
1262 (NodeName, argp, sizeof(NodeName_type)))
1263 return -EFAULT;
1264
1265 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1266
1267 /* Update the field, and then ring the doorbell */
1268 for (i = 0; i < 16; i++)
1269 writeb(NodeName[i],
1270 &host->cfgtable->ServerName[i]);
1271
1272 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1273
1274 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1275 if (!(readl(host->vaddr + SA5_DOORBELL)
1276 & CFGTBL_ChangeReq))
1277 break;
1278 /* delay and try again */
1279 udelay(1000);
1280 }
1281 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1282 if (i >= MAX_IOCTL_CONFIG_WAIT)
1283 return -EAGAIN;
1284 return 0;
1285 }
1da177e4
LT		 1286
1287 case CCISS_GETHEARTBEAT:
7c832835
BH		 1288 {
1289 Heartbeat_type heartbeat;
1290
1291 if (!arg)
1292 return -EINVAL;
1293 heartbeat = readl(&host->cfgtable->HeartBeat);
1294 if (copy_to_user
1295 (argp, &heartbeat, sizeof(Heartbeat_type)))
1296 return -EFAULT;
1297 return 0;
1298 }
1da177e4 1299 case CCISS_GETBUSTYPES:
7c832835
BH		 1300 {
1301 BusTypes_type BusTypes;
1302
1303 if (!arg)
1304 return -EINVAL;
1305 BusTypes = readl(&host->cfgtable->BusTypes);
1306 if (copy_to_user
1307 (argp, &BusTypes, sizeof(BusTypes_type)))
1308 return -EFAULT;
1309 return 0;
1310 }
1da177e4 1311 case CCISS_GETFIRMVER:
7c832835
BH		 1312 {
1313 FirmwareVer_type firmware;
1da177e4 1314
7c832835
BH		 1315 if (!arg)
1316 return -EINVAL;
1317 memcpy(firmware, host->firm_ver, 4);
1da177e4 1318
7c832835
BH		 1319 if (copy_to_user
1320 (argp, firmware, sizeof(FirmwareVer_type)))
1321 return -EFAULT;
1322 return 0;
1323 }
1324 case CCISS_GETDRIVVER:
1325 {
1326 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1327
7c832835
BH		 1328 if (!arg)
1329 return -EINVAL;
1da177e4 1330
7c832835
BH		 1331 if (copy_to_user
1332 (argp, &DriverVer, sizeof(DriverVer_type)))
1333 return -EFAULT;
1334 return 0;
1335 }
1da177e4 1336
6ae5ce8e
MM		 1337 case CCISS_DEREGDISK:
1338 case CCISS_REGNEWD:
1da177e4 1339 case CCISS_REVALIDVOLS:
2d11d993 1340 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1341
1342 case CCISS_GETLUNINFO:{
1343 LogvolInfo_struct luninfo;
1344
39ccf9a6
SC		 1345 memcpy(&luninfo.LunID, drv->LunID,
1346 sizeof(luninfo.LunID));
7c832835
BH		 1347 luninfo.num_opens = drv->usage_count;
1348 luninfo.num_parts = 0;
1349 if (copy_to_user(argp, &luninfo,
1350 sizeof(LogvolInfo_struct)))
1351 return -EFAULT;
1352 return 0;
1353 }
1da177e4 1354 case CCISS_PASSTHRU:
1da177e4 1355 {
7c832835
BH		 1356 IOCTL_Command_struct iocommand;
1357 CommandList_struct *c;
1358 char *buff = NULL;
1359 u64bit temp64;
1360 unsigned long flags;
6e9a4738 1361 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1362
7c832835
BH		 1363 if (!arg)
1364 return -EINVAL;
1da177e4 1365
7c832835
BH		 1366 if (!capable(CAP_SYS_RAWIO))
1367 return -EPERM;
1da177e4 1368
7c832835
BH		 1369 if (copy_from_user
1370 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1371 return -EFAULT;
1372 if ((iocommand.buf_size < 1) &&
1373 (iocommand.Request.Type.Direction != XFER_NONE)) {
1374 return -EINVAL;
1375 }
1376#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1377 /* Check kmalloc limits */
1378 if (iocommand.buf_size > 128000)
1379 return -EINVAL;
1380#endif
1381 if (iocommand.buf_size > 0) {
1382 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1383 if (buff == NULL)
1384 return -EFAULT;
1385 }
1386 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1387 /* Copy the data into the buffer we created */
1388 if (copy_from_user
1389 (buff, iocommand.buf, iocommand.buf_size)) {
1390 kfree(buff);
1391 return -EFAULT;
1392 }
1393 } else {
1394 memset(buff, 0, iocommand.buf_size);
1395 }
1396 if ((c = cmd_alloc(host, 0)) == NULL) {
1397 kfree(buff);
1398 return -ENOMEM;
1399 }
b028461d 1400 /* Fill in the command type */
7c832835 1401 c->cmd_type = CMD_IOCTL_PEND;
b028461d 1402 /* Fill in Command Header */
1403 c->Header.ReplyQueue = 0; /* unused in simple mode */
1404 if (iocommand.buf_size > 0) /* buffer to fill */
7c832835
BH		 1405 {
1406 c->Header.SGList = 1;
1407 c->Header.SGTotal = 1;
b028461d 1408 } else /* no buffers to fill */
7c832835
BH		 1409 {
1410 c->Header.SGList = 0;
1411 c->Header.SGTotal = 0;
1412 }
1413 c->Header.LUN = iocommand.LUN_info;
b028461d 1414 /* use the kernel address the cmd block for tag */
1415 c->Header.Tag.lower = c->busaddr;
1da177e4 1416
b028461d 1417 /* Fill in Request block */
7c832835 1418 c->Request = iocommand.Request;
1da177e4 1419
b028461d 1420 /* Fill in the scatter gather information */
7c832835
BH		 1421 if (iocommand.buf_size > 0) {
1422 temp64.val = pci_map_single(host->pdev, buff,
1423 iocommand.buf_size,
1424 PCI_DMA_BIDIRECTIONAL);
1425 c->SG[0].Addr.lower = temp64.val32.lower;
1426 c->SG[0].Addr.upper = temp64.val32.upper;
1427 c->SG[0].Len = iocommand.buf_size;
b028461d 1428 c->SG[0].Ext = 0; /* we are not chaining */
7c832835
BH		 1429 }
1430 c->waiting = &wait;
1431
1432 /* Put the request on the tail of the request queue */
1433 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1434 addQ(&host->reqQ, c);
1435 host->Qdepth++;
1436 start_io(host);
1437 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1438
1439 wait_for_completion(&wait);
1440
1441 /* unlock the buffers from DMA */
1442 temp64.val32.lower = c->SG[0].Addr.lower;
1443 temp64.val32.upper = c->SG[0].Addr.upper;
1444 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1445 iocommand.buf_size,
1446 PCI_DMA_BIDIRECTIONAL);
1447
0a9279cc
MM		 1448 check_ioctl_unit_attention(host, c);
1449
7c832835
BH		 1450 /* Copy the error information out */
1451 iocommand.error_info = *(c->err_info);
1452 if (copy_to_user
1453 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1454 kfree(buff);
1da177e4
LT		 1455 cmd_free(host, c, 0);
1456 return -EFAULT;
1457 }
7c832835
BH		 1458
1459 if (iocommand.Request.Type.Direction == XFER_READ) {
1460 /* Copy the data out of the buffer we created */
1461 if (copy_to_user
1462 (iocommand.buf, buff, iocommand.buf_size)) {
1463 kfree(buff);
1464 cmd_free(host, c, 0);
1465 return -EFAULT;
1466 }
1467 }
1468 kfree(buff);
1469 cmd_free(host, c, 0);
1470 return 0;
1da177e4 1471 }
7c832835
BH		 1472 case CCISS_BIG_PASSTHRU:{
1473 BIG_IOCTL_Command_struct *ioc;
1474 CommandList_struct *c;
1475 unsigned char **buff = NULL;
1476 int *buff_size = NULL;
1477 u64bit temp64;
1478 unsigned long flags;
1479 BYTE sg_used = 0;
1480 int status = 0;
1481 int i;
6e9a4738 1482 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1483 __u32 left;
1484 __u32 sz;
1485 BYTE __user *data_ptr;
1486
1487 if (!arg)
1488 return -EINVAL;
1489 if (!capable(CAP_SYS_RAWIO))
1490 return -EPERM;
1491 ioc = (BIG_IOCTL_Command_struct *)
1492 kmalloc(sizeof(*ioc), GFP_KERNEL);
1493 if (!ioc) {
1494 status = -ENOMEM;
1495 goto cleanup1;
1496 }
1497 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1498 status = -EFAULT;
1499 goto cleanup1;
1500 }
1501 if ((ioc->buf_size < 1) &&
1502 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1503 status = -EINVAL;
1504 goto cleanup1;
7c832835
BH		 1505 }
1506 /* Check kmalloc limits using all SGs */
1507 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1508 status = -EINVAL;
1509 goto cleanup1;
1510 }
1511 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1512 status = -EINVAL;
1513 goto cleanup1;
1514 }
1515 buff =
1516 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1517 if (!buff) {
1da177e4
LT		 1518 status = -ENOMEM;
1519 goto cleanup1;
1520 }
5cbded58 1521 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1522 GFP_KERNEL);
1523 if (!buff_size) {
1524 status = -ENOMEM;
1525 goto cleanup1;
1526 }
1527 left = ioc->buf_size;
1528 data_ptr = ioc->buf;
1529 while (left) {
1530 sz = (left >
1531 ioc->malloc_size) ? ioc->
1532 malloc_size : left;
1533 buff_size[sg_used] = sz;
1534 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1535 if (buff[sg_used] == NULL) {
1da177e4 1536 status = -ENOMEM;
15534d38
JA		 1537 goto cleanup1;
1538 }
7c832835
BH		 1539 if (ioc->Request.Type.Direction == XFER_WRITE) {
1540 if (copy_from_user
1541 (buff[sg_used], data_ptr, sz)) {
f7108f91 1542 status = -EFAULT;
7c832835
BH		 1543 goto cleanup1;
1544 }
1545 } else {
1546 memset(buff[sg_used], 0, sz);
1547 }
1548 left -= sz;
1549 data_ptr += sz;
1550 sg_used++;
1551 }
1552 if ((c = cmd_alloc(host, 0)) == NULL) {
1553 status = -ENOMEM;
1554 goto cleanup1;
1555 }
1556 c->cmd_type = CMD_IOCTL_PEND;
1557 c->Header.ReplyQueue = 0;
1558
1559 if (ioc->buf_size > 0) {
1560 c->Header.SGList = sg_used;
1561 c->Header.SGTotal = sg_used;
1da177e4 1562 } else {
7c832835
BH		 1563 c->Header.SGList = 0;
1564 c->Header.SGTotal = 0;
1da177e4 1565 }
7c832835
BH		 1566 c->Header.LUN = ioc->LUN_info;
1567 c->Header.Tag.lower = c->busaddr;
1568
1569 c->Request = ioc->Request;
1570 if (ioc->buf_size > 0) {
1571 int i;
1572 for (i = 0; i < sg_used; i++) {
1573 temp64.val =
1574 pci_map_single(host->pdev, buff[i],
1575 buff_size[i],
1576 PCI_DMA_BIDIRECTIONAL);
1577 c->SG[i].Addr.lower =
1578 temp64.val32.lower;
1579 c->SG[i].Addr.upper =
1580 temp64.val32.upper;
1581 c->SG[i].Len = buff_size[i];
1582 c->SG[i].Ext = 0; /* we are not chaining */
1583 }
1584 }
1585 c->waiting = &wait;
1586 /* Put the request on the tail of the request queue */
1587 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1588 addQ(&host->reqQ, c);
1589 host->Qdepth++;
1590 start_io(host);
1591 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1592 wait_for_completion(&wait);
1593 /* unlock the buffers from DMA */
1594 for (i = 0; i < sg_used; i++) {
1595 temp64.val32.lower = c->SG[i].Addr.lower;
1596 temp64.val32.upper = c->SG[i].Addr.upper;
1597 pci_unmap_single(host->pdev,
1598 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1599 PCI_DMA_BIDIRECTIONAL);
1da177e4 1600 }
0a9279cc 1601 check_ioctl_unit_attention(host, c);
7c832835
BH		 1602 /* Copy the error information out */
1603 ioc->error_info = *(c->err_info);
1604 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1605 cmd_free(host, c, 0);
1606 status = -EFAULT;
1607 goto cleanup1;
1608 }
1609 if (ioc->Request.Type.Direction == XFER_READ) {
1610 /* Copy the data out of the buffer we created */
1611 BYTE __user *ptr = ioc->buf;
1612 for (i = 0; i < sg_used; i++) {
1613 if (copy_to_user
1614 (ptr, buff[i], buff_size[i])) {
1615 cmd_free(host, c, 0);
1616 status = -EFAULT;
1617 goto cleanup1;
1618 }
1619 ptr += buff_size[i];
1da177e4 1620 }
1da177e4 1621 }
7c832835
BH		 1622 cmd_free(host, c, 0);
1623 status = 0;
1624 cleanup1:
1625 if (buff) {
1626 for (i = 0; i < sg_used; i++)
1627 kfree(buff[i]);
1628 kfree(buff);
1629 }
1630 kfree(buff_size);
1631 kfree(ioc);
1632 return status;
1da177e4 1633 }
03bbfee5
MMOD		 1634
1635 /* scsi_cmd_ioctl handles these, below, though some are not */
1636 /* very meaningful for cciss. SG_IO is the main one people want. */
1637
1638 case SG_GET_VERSION_NUM:
1639 case SG_SET_TIMEOUT:
1640 case SG_GET_TIMEOUT:
1641 case SG_GET_RESERVED_SIZE:
1642 case SG_SET_RESERVED_SIZE:
1643 case SG_EMULATED_HOST:
1644 case SG_IO:
1645 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1646 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1647
1648 /* scsi_cmd_ioctl would normally handle these, below, but */
1649 /* they aren't a good fit for cciss, as CD-ROMs are */
1650 /* not supported, and we don't have any bus/target/lun */
1651 /* which we present to the kernel. */
1652
1653 case CDROM_SEND_PACKET:
1654 case CDROMCLOSETRAY:
1655 case CDROMEJECT:
1656 case SCSI_IOCTL_GET_IDLUN:
1657 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1658 default:
1659 return -ENOTTY;
1660 }
1da177e4
LT		 1661}
1662
7b30f092
JA		 1663static void cciss_check_queues(ctlr_info_t *h)
1664{
1665 int start_queue = h->next_to_run;
1666 int i;
1667
1668 /* check to see if we have maxed out the number of commands that can
1669 * be placed on the queue. If so then exit. We do this check here
1670 * in case the interrupt we serviced was from an ioctl and did not
1671 * free any new commands.
1672 */
f880632f 1673 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1674 return;
1675
1676 /* We have room on the queue for more commands. Now we need to queue
1677 * them up. We will also keep track of the next queue to run so
1678 * that every queue gets a chance to be started first.
1679 */
1680 for (i = 0; i < h->highest_lun + 1; i++) {
1681 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1682 /* make sure the disk has been added and the drive is real
1683 * because this can be called from the middle of init_one.
1684 */
9cef0d2f
SC		 1685 if (!h->drv[curr_queue])
1686 continue;
1687 if (!(h->drv[curr_queue]->queue) ||
1688 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1689 continue;
1690 blk_start_queue(h->gendisk[curr_queue]->queue);
1691
1692 /* check to see if we have maxed out the number of commands
1693 * that can be placed on the queue.
1694 */
f880632f 1695 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1696 if (curr_queue == start_queue) {
1697 h->next_to_run =
1698 (start_queue + 1) % (h->highest_lun + 1);
1699 break;
1700 } else {
1701 h->next_to_run = curr_queue;
1702 break;
1703 }
7b30f092
JA		 1704 }
1705 }
1706}
1707
ca1e0484
MM		 1708static void cciss_softirq_done(struct request *rq)
1709{
1710 CommandList_struct *cmd = rq->completion_data;
1711 ctlr_info_t *h = hba[cmd->ctlr];
5c07a311 1712 SGDescriptor_struct *curr_sg = cmd->SG;
ca1e0484
MM		 1713 unsigned long flags;
1714 u64bit temp64;
1715 int i, ddir;
5c07a311 1716 int sg_index = 0;
ca1e0484
MM		 1717
1718 if (cmd->Request.Type.Direction == XFER_READ)
1719 ddir = PCI_DMA_FROMDEVICE;
1720 else
1721 ddir = PCI_DMA_TODEVICE;
1722
1723 /* command did not need to be retried */
1724 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1725 for (i = 0; i < cmd->Header.SGList; i++) {
5c07a311
DB		 1726 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
1727 temp64.val32.lower = cmd->SG[i].Addr.lower;
1728 temp64.val32.upper = cmd->SG[i].Addr.upper;
1729 pci_dma_sync_single_for_cpu(h->pdev, temp64.val,
1730 cmd->SG[i].Len, ddir);
1731 pci_unmap_single(h->pdev, temp64.val,
1732 cmd->SG[i].Len, ddir);
1733 /* Point to the next block */
1734 curr_sg = h->cmd_sg_list[cmd->cmdindex]->sgchain;
1735 sg_index = 0;
1736 }
1737 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1738 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1739 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1740 ddir);
1741 ++sg_index;
ca1e0484
MM		 1742 }
1743
ca1e0484
MM		 1744#ifdef CCISS_DEBUG
1745 printk("Done with %p\n", rq);
7c832835 1746#endif /* CCISS_DEBUG */
ca1e0484 1747
c3a4d78c 1748 /* set the residual count for pc requests */
ac44e5b2 1749 if (blk_pc_request(rq))
c3a4d78c 1750 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1751
c3a4d78c 1752 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1753
ca1e0484 1754 spin_lock_irqsave(&h->lock, flags);
7c832835 1755 cmd_free(h, cmd, 1);
7b30f092 1756 cciss_check_queues(h);
ca1e0484
MM		 1757 spin_unlock_irqrestore(&h->lock, flags);
1758}
1759
39ccf9a6
SC		 1760static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1761 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1762{
9cef0d2f
SC		 1763 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1764 sizeof(h->drv[log_unit]->LunID));
b57695fe 1765}
1766
7fe06326
AP		 1767/* This function gets the SCSI vendor, model, and revision of a logical drive
1768 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1769 * they cannot be read.
1770 */
7b838bde 1771static void cciss_get_device_descr(int ctlr, int logvol,
7fe06326
AP		 1772 char *vendor, char *model, char *rev)
1773{
1774 int rc;
1775 InquiryData_struct *inq_buf;
b57695fe 1776 unsigned char scsi3addr[8];
7fe06326
AP		 1777
1778 *vendor = '\0';
1779 *model = '\0';
1780 *rev = '\0';
1781
1782 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1783 if (!inq_buf)
1784 return;
1785
b57695fe 1786 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1787 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1788 scsi3addr, TYPE_CMD);
7fe06326
AP		 1789 if (rc == IO_OK) {
1790 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1791 vendor[VENDOR_LEN] = '\0';
1792 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1793 model[MODEL_LEN] = '\0';
1794 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1795 rev[REV_LEN] = '\0';
1796 }
1797
1798 kfree(inq_buf);
1799 return;
1800}
1801
a72da29b
MM		 1802/* This function gets the serial number of a logical drive via
1803 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1804 * number cannot be had, for whatever reason, 16 bytes of 0xff
1805 * are returned instead.
1806 */
7b838bde 1807static void cciss_get_serial_no(int ctlr, int logvol,
a72da29b
MM		 1808 unsigned char *serial_no, int buflen)
1809{
1810#define PAGE_83_INQ_BYTES 64
1811 int rc;
1812 unsigned char *buf;
b57695fe 1813 unsigned char scsi3addr[8];
a72da29b
MM		 1814
1815 if (buflen > 16)
1816 buflen = 16;
1817 memset(serial_no, 0xff, buflen);
1818 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1819 if (!buf)
1820 return;
1821 memset(serial_no, 0, buflen);
b57695fe 1822 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1823 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1824 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1825 if (rc == IO_OK)
1826 memcpy(serial_no, &buf[8], buflen);
1827 kfree(buf);
1828 return;
1829}
1830
617e1344
SC		 1831/*
1832 * cciss_add_disk sets up the block device queue for a logical drive
1833 */
1834static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1835 int drv_index)
1836{
1837 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1838 if (!disk->queue)
1839 goto init_queue_failure;
6ae5ce8e
MM		 1840 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1841 disk->major = h->major;
1842 disk->first_minor = drv_index << NWD_SHIFT;
1843 disk->fops = &cciss_fops;
9cef0d2f
SC		 1844 if (cciss_create_ld_sysfs_entry(h, drv_index))
1845 goto cleanup_queue;
1846 disk->private_data = h->drv[drv_index];
1847 disk->driverfs_dev = &h->drv[drv_index]->dev;
6ae5ce8e
MM		 1848
1849 /* Set up queue information */
1850 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1851
1852 /* This is a hardware imposed limit. */
8a78362c 1853 blk_queue_max_segments(disk->queue, h->maxsgentries);
6ae5ce8e 1854
086fa5ff 1855 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
6ae5ce8e
MM		 1856
1857 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1858
1859 disk->queue->queuedata = h;
1860
e1defc4f 1861 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1862 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1863
1864 /* Make sure all queue data is written out before */
9cef0d2f 1865 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1866 /* allows the interrupt handler to start the queue */
1867 wmb();
9cef0d2f 1868 h->drv[drv_index]->queue = disk->queue;
6ae5ce8e 1869 add_disk(disk);
617e1344
SC		 1870 return 0;
1871
1872cleanup_queue:
1873 blk_cleanup_queue(disk->queue);
1874 disk->queue = NULL;
e8074f79 1875init_queue_failure:
617e1344 1876 return -1;
6ae5ce8e
MM		 1877}
1878
ddd47442 1879/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1880 * If the usage_count is zero and it is a heretofore unknown drive, or,
1881 * the drive's capacity, geometry, or serial number has changed,
1882 * then the drive information will be updated and the disk will be
1883 * re-registered with the kernel. If these conditions don't hold,
1884 * then it will be left alone for the next reboot. The exception to this
1885 * is disk 0 which will always be left registered with the kernel since it
1886 * is also the controller node. Any changes to disk 0 will show up on
1887 * the next reboot.
7c832835 1888 */
2d11d993
SC		 1889static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1890 int via_ioctl)
7c832835 1891{
ddd47442
MM		 1892 ctlr_info_t *h = hba[ctlr];
1893 struct gendisk *disk;
ddd47442
MM		 1894 InquiryData_struct *inq_buff = NULL;
1895 unsigned int block_size;
00988a35 1896 sector_t total_size;
ddd47442
MM		 1897 unsigned long flags = 0;
1898 int ret = 0;
a72da29b
MM		 1899 drive_info_struct *drvinfo;
1900
1901 /* Get information about the disk and modify the driver structure */
1902 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1903 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 1904 if (inq_buff == NULL || drvinfo == NULL)
1905 goto mem_msg;
1906
1907 /* testing to see if 16-byte CDBs are already being used */
1908 if (h->cciss_read == CCISS_READ_16) {
7b838bde 1909 cciss_read_capacity_16(h->ctlr, drv_index,
a72da29b
MM		 1910 &total_size, &block_size);
1911
1912 } else {
7b838bde 1913 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
a72da29b
MM		 1914 /* if read_capacity returns all F's this volume is >2TB */
1915 /* in size so we switch to 16-byte CDB's for all */
1916 /* read/write ops */
1917 if (total_size == 0xFFFFFFFFULL) {
7b838bde 1918 cciss_read_capacity_16(ctlr, drv_index,
a72da29b
MM		 1919 &total_size, &block_size);
1920 h->cciss_read = CCISS_READ_16;
1921 h->cciss_write = CCISS_WRITE_16;
1922 } else {
1923 h->cciss_read = CCISS_READ_10;
1924 h->cciss_write = CCISS_WRITE_10;
1925 }
1926 }
1927
7b838bde 1928 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
a72da29b
MM		 1929 inq_buff, drvinfo);
1930 drvinfo->block_size = block_size;
1931 drvinfo->nr_blocks = total_size + 1;
1932
7b838bde 1933 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
7fe06326 1934 drvinfo->model, drvinfo->rev);
7b838bde 1935 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
a72da29b 1936 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 1937 /* Save the lunid in case we deregister the disk, below. */
1938 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1939 sizeof(drvinfo->LunID));
a72da29b
MM		 1940
1941 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 1942 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 1943 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 1944 h->drv[drv_index]->serial_no, 16) == 0) &&
1945 drvinfo->block_size == h->drv[drv_index]->block_size &&
1946 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1947 drvinfo->heads == h->drv[drv_index]->heads &&
1948 drvinfo->sectors == h->drv[drv_index]->sectors &&
1949 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 1950 /* The disk is unchanged, nothing to update */
1951 goto freeret;
a72da29b 1952
6ae5ce8e
MM		 1953 /* If we get here it's not the same disk, or something's changed,
1954 * so we need to * deregister it, and re-register it, if it's not
1955 * in use.
1956 * If the disk already exists then deregister it before proceeding
1957 * (unless it's the first disk (for the controller node).
1958 */
9cef0d2f 1959 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 1960 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442 1961 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 1962 h->drv[drv_index]->busy_configuring = 1;
ddd47442 1963 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1964
9cef0d2f 1965 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 1966 * which keeps the interrupt handler from starting
1967 * the queue.
1968 */
2d11d993 1969 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1970 }
1971
1972 /* If the disk is in use return */
1973 if (ret)
a72da29b
MM		 1974 goto freeret;
1975
6ae5ce8e 1976 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 1977 * and serial number inquiry. If the disk was deregistered
1978 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 1979 */
9cef0d2f
SC		 1980 if (h->drv[drv_index] == NULL) {
1981 drvinfo->device_initialized = 0;
1982 h->drv[drv_index] = drvinfo;
1983 drvinfo = NULL; /* so it won't be freed below. */
1984 } else {
1985 /* special case for cxd0 */
1986 h->drv[drv_index]->block_size = drvinfo->block_size;
1987 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
1988 h->drv[drv_index]->heads = drvinfo->heads;
1989 h->drv[drv_index]->sectors = drvinfo->sectors;
1990 h->drv[drv_index]->cylinders = drvinfo->cylinders;
1991 h->drv[drv_index]->raid_level = drvinfo->raid_level;
1992 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
1993 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
1994 VENDOR_LEN + 1);
1995 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
1996 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
1997 }
ddd47442
MM		 1998
1999 ++h->num_luns;
2000 disk = h->gendisk[drv_index];
9cef0d2f 2001 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 2002
6ae5ce8e
MM		 2003 /* If it's not disk 0 (drv_index != 0)
2004 * or if it was disk 0, but there was previously
2005 * no actual corresponding configured logical drive
2006 * (raid_leve == -1) then we want to update the
2007 * logical drive's information.
2008 */
361e9b07
SC		 2009 if (drv_index || first_time) {
2010 if (cciss_add_disk(h, disk, drv_index) != 0) {
2011 cciss_free_gendisk(h, drv_index);
9cef0d2f 2012 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2013 printk(KERN_WARNING "cciss:%d could not update "
2014 "disk %d\n", h->ctlr, drv_index);
2015 --h->num_luns;
2016 }
2017 }
ddd47442 2018
6ae5ce8e 2019freeret:
ddd47442 2020 kfree(inq_buff);
a72da29b 2021 kfree(drvinfo);
ddd47442 2022 return;
6ae5ce8e 2023mem_msg:
ddd47442
MM		 2024 printk(KERN_ERR "cciss: out of memory\n");
2025 goto freeret;
2026}
2027
2028/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 2029 * that has a null drv pointer and allocate the drive info struct and
2030 * will return that index This is where new drives will be added.
2031 * If the index to be returned is greater than the highest_lun index for
2032 * the controller then highest_lun is set * to this new index.
2033 * If there are no available indexes or if tha allocation fails, then -1
2034 * is returned. * "controller_node" is used to know if this is a real
2035 * logical drive, or just the controller node, which determines if this
2036 * counts towards highest_lun.
7c832835 2037 */
9cef0d2f 2038static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 2039{
2040 int i;
9cef0d2f 2041 drive_info_struct *drv;
ddd47442 2042
9cef0d2f 2043 /* Search for an empty slot for our drive info */
7c832835 2044 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 2045
2046 /* if not cxd0 case, and it's occupied, skip it. */
2047 if (h->drv[i] && i != 0)
2048 continue;
2049 /*
2050 * If it's cxd0 case, and drv is alloc'ed already, and a
2051 * disk is configured there, skip it.
2052 */
2053 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2054 continue;
2055
2056 /*
2057 * We've found an empty slot. Update highest_lun
2058 * provided this isn't just the fake cxd0 controller node.
2059 */
2060 if (i > h->highest_lun && !controller_node)
2061 h->highest_lun = i;
2062
2063 /* If adding a real disk at cxd0, and it's already alloc'ed */
2064 if (i == 0 && h->drv[i] != NULL)
ddd47442 2065 return i;
9cef0d2f
SC		 2066
2067 /*
2068 * Found an empty slot, not already alloc'ed. Allocate it.
2069 * Mark it with raid_level == -1, so we know it's new later on.
2070 */
2071 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2072 if (!drv)
2073 return -1;
2074 drv->raid_level = -1; /* so we know it's new */
2075 h->drv[i] = drv;
2076 return i;
ddd47442
MM		 2077 }
2078 return -1;
2079}
2080
9cef0d2f
SC		 2081static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2082{
2083 kfree(h->drv[drv_index]);
2084 h->drv[drv_index] = NULL;
2085}
2086
361e9b07
SC		 2087static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2088{
2089 put_disk(h->gendisk[drv_index]);
2090 h->gendisk[drv_index] = NULL;
2091}
2092
6ae5ce8e
MM		 2093/* cciss_add_gendisk finds a free hba[]->drv structure
2094 * and allocates a gendisk if needed, and sets the lunid
2095 * in the drvinfo structure. It returns the index into
2096 * the ->drv[] array, or -1 if none are free.
2097 * is_controller_node indicates whether highest_lun should
2098 * count this disk, or if it's only being added to provide
2099 * a means to talk to the controller in case no logical
2100 * drives have yet been configured.
2101 */
39ccf9a6
SC		 2102static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2103 int controller_node)
6ae5ce8e
MM		 2104{
2105 int drv_index;
2106
9cef0d2f 2107 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2108 if (drv_index == -1)
2109 return -1;
8ce51966 2110
6ae5ce8e
MM		 2111 /*Check if the gendisk needs to be allocated */
2112 if (!h->gendisk[drv_index]) {
2113 h->gendisk[drv_index] =
2114 alloc_disk(1 << NWD_SHIFT);
2115 if (!h->gendisk[drv_index]) {
2116 printk(KERN_ERR "cciss%d: could not "
2117 "allocate a new disk %d\n",
2118 h->ctlr, drv_index);
9cef0d2f 2119 goto err_free_drive_info;
6ae5ce8e
MM		 2120 }
2121 }
9cef0d2f
SC		 2122 memcpy(h->drv[drv_index]->LunID, lunid,
2123 sizeof(h->drv[drv_index]->LunID));
2124 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2125 goto err_free_disk;
6ae5ce8e
MM		 2126 /* Don't need to mark this busy because nobody */
2127 /* else knows about this disk yet to contend */
2128 /* for access to it. */
9cef0d2f 2129 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2130 wmb();
2131 return drv_index;
7fe06326
AP		 2132
2133err_free_disk:
361e9b07 2134 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2135err_free_drive_info:
2136 cciss_free_drive_info(h, drv_index);
7fe06326 2137 return -1;
6ae5ce8e
MM		 2138}
2139
2140/* This is for the special case of a controller which
2141 * has no logical drives. In this case, we still need
2142 * to register a disk so the controller can be accessed
2143 * by the Array Config Utility.
2144 */
2145static void cciss_add_controller_node(ctlr_info_t *h)
2146{
2147 struct gendisk *disk;
2148 int drv_index;
2149
2150 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2151 return;
2152
39ccf9a6 2153 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2154 if (drv_index == -1)
2155 goto error;
9cef0d2f
SC		 2156 h->drv[drv_index]->block_size = 512;
2157 h->drv[drv_index]->nr_blocks = 0;
2158 h->drv[drv_index]->heads = 0;
2159 h->drv[drv_index]->sectors = 0;
2160 h->drv[drv_index]->cylinders = 0;
2161 h->drv[drv_index]->raid_level = -1;
2162 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2163 disk = h->gendisk[drv_index];
361e9b07
SC		 2164 if (cciss_add_disk(h, disk, drv_index) == 0)
2165 return;
2166 cciss_free_gendisk(h, drv_index);
9cef0d2f 2167 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2168error:
2169 printk(KERN_WARNING "cciss%d: could not "
2170 "add disk 0.\n", h->ctlr);
2171 return;
6ae5ce8e
MM		 2172}
2173
ddd47442 2174/* This function will add and remove logical drives from the Logical
d14c4ab5 2175 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2176 * so that mount points are preserved until the next reboot. This allows
2177 * for the removal of logical drives in the middle of the drive array
2178 * without a re-ordering of those drives.
2179 * INPUT
2180 * h = The controller to perform the operations on
7c832835 2181 */
2d11d993
SC		 2182static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2183 int via_ioctl)
1da177e4 2184{
ddd47442
MM		 2185 int ctlr = h->ctlr;
2186 int num_luns;
2187 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2188 int return_code;
2189 int listlength = 0;
2190 int i;
2191 int drv_found;
2192 int drv_index = 0;
39ccf9a6 2193 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2194 unsigned long flags;
ddd47442 2195
6ae5ce8e
MM		 2196 if (!capable(CAP_SYS_RAWIO))
2197 return -EPERM;
2198
ddd47442
MM		 2199 /* Set busy_configuring flag for this operation */
2200 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2201 if (h->busy_configuring) {
ddd47442
MM		 2202 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2203 return -EBUSY;
2204 }
2205 h->busy_configuring = 1;
a72da29b 2206 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2207
a72da29b
MM		 2208 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2209 if (ld_buff == NULL)
2210 goto mem_msg;
2211
2212 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2213 sizeof(ReportLunData_struct),
2214 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2215
a72da29b
MM		 2216 if (return_code == IO_OK)
2217 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2218 else { /* reading number of logical volumes failed */
2219 printk(KERN_WARNING "cciss: report logical volume"
2220 " command failed\n");
2221 listlength = 0;
2222 goto freeret;
2223 }
2224
2225 num_luns = listlength / 8; /* 8 bytes per entry */
2226 if (num_luns > CISS_MAX_LUN) {
2227 num_luns = CISS_MAX_LUN;
2228 printk(KERN_WARNING "cciss: more luns configured"
2229 " on controller than can be handled by"
2230 " this driver.\n");
2231 }
2232
6ae5ce8e
MM		 2233 if (num_luns == 0)
2234 cciss_add_controller_node(h);
2235
2236 /* Compare controller drive array to driver's drive array
2237 * to see if any drives are missing on the controller due
2238 * to action of Array Config Utility (user deletes drive)
2239 * and deregister logical drives which have disappeared.
2240 */
a72da29b
MM		 2241 for (i = 0; i <= h->highest_lun; i++) {
2242 int j;
2243 drv_found = 0;
d8a0be6a
SC		 2244
2245 /* skip holes in the array from already deleted drives */
9cef0d2f 2246 if (h->drv[i] == NULL)
d8a0be6a
SC		 2247 continue;
2248
a72da29b 2249 for (j = 0; j < num_luns; j++) {
39ccf9a6 2250 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2251 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2252 sizeof(lunid)) == 0) {
a72da29b
MM		 2253 drv_found = 1;
2254 break;
2255 }
2256 }
2257 if (!drv_found) {
2258 /* Deregister it from the OS, it's gone. */
2259 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2260 h->drv[i]->busy_configuring = 1;
a72da29b 2261 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2262 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2263 if (h->drv[i] != NULL)
2264 h->drv[i]->busy_configuring = 0;
ddd47442 2265 }
a72da29b 2266 }
ddd47442 2267
a72da29b
MM		 2268 /* Compare controller drive array to driver's drive array.
2269 * Check for updates in the drive information and any new drives
2270 * on the controller due to ACU adding logical drives, or changing
2271 * a logical drive's size, etc. Reregister any new/changed drives
2272 */
2273 for (i = 0; i < num_luns; i++) {
2274 int j;
ddd47442 2275
a72da29b 2276 drv_found = 0;
ddd47442 2277
39ccf9a6 2278 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2279 /* Find if the LUN is already in the drive array
2280 * of the driver. If so then update its info
2281 * if not in use. If it does not exist then find
2282 * the first free index and add it.
2283 */
2284 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2285 if (h->drv[j] != NULL &&
2286 memcmp(h->drv[j]->LunID, lunid,
2287 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2288 drv_index = j;
2289 drv_found = 1;
2290 break;
ddd47442 2291 }
a72da29b 2292 }
ddd47442 2293
a72da29b
MM		 2294 /* check if the drive was found already in the array */
2295 if (!drv_found) {
eece695f 2296 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2297 if (drv_index == -1)
2298 goto freeret;
a72da29b 2299 }
2d11d993
SC		 2300 cciss_update_drive_info(ctlr, drv_index, first_time,
2301 via_ioctl);
a72da29b 2302 } /* end for */
ddd47442 2303
6ae5ce8e 2304freeret:
ddd47442
MM		 2305 kfree(ld_buff);
2306 h->busy_configuring = 0;
2307 /* We return -1 here to tell the ACU that we have registered/updated
2308 * all of the drives that we can and to keep it from calling us
2309 * additional times.
7c832835 2310 */
ddd47442 2311 return -1;
6ae5ce8e 2312mem_msg:
ddd47442 2313 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2314 h->busy_configuring = 0;
ddd47442
MM		 2315 goto freeret;
2316}
2317
9ddb27b4
SC		 2318static void cciss_clear_drive_info(drive_info_struct *drive_info)
2319{
2320 /* zero out the disk size info */
2321 drive_info->nr_blocks = 0;
2322 drive_info->block_size = 0;
2323 drive_info->heads = 0;
2324 drive_info->sectors = 0;
2325 drive_info->cylinders = 0;
2326 drive_info->raid_level = -1;
2327 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2328 memset(drive_info->model, 0, sizeof(drive_info->model));
2329 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2330 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2331 /*
2332 * don't clear the LUNID though, we need to remember which
2333 * one this one is.
2334 */
2335}
2336
ddd47442
MM		 2337/* This function will deregister the disk and it's queue from the
2338 * kernel. It must be called with the controller lock held and the
2339 * drv structures busy_configuring flag set. It's parameters are:
2340 *
2341 * disk = This is the disk to be deregistered
2342 * drv = This is the drive_info_struct associated with the disk to be
2343 * deregistered. It contains information about the disk used
2344 * by the driver.
2345 * clear_all = This flag determines whether or not the disk information
2346 * is going to be completely cleared out and the highest_lun
2347 * reset. Sometimes we want to clear out information about
d14c4ab5 2348 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2349 * the highest_lun should be left unchanged and the LunID
2350 * should not be cleared.
2d11d993
SC		 2351 * via_ioctl
2352 * This indicates whether we've reached this path via ioctl.
2353 * This affects the maximum usage count allowed for c0d0 to be messed with.
2354 * If this path is reached via ioctl(), then the max_usage_count will
2355 * be 1, as the process calling ioctl() has got to have the device open.
2356 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2357*/
a0ea8622 2358static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2359 int clear_all, int via_ioctl)
ddd47442 2360{
799202cb 2361 int i;
a0ea8622
SC		 2362 struct gendisk *disk;
2363 drive_info_struct *drv;
9cef0d2f 2364 int recalculate_highest_lun;
1da177e4
LT		 2365
2366 if (!capable(CAP_SYS_RAWIO))
2367 return -EPERM;
2368
9cef0d2f 2369 drv = h->drv[drv_index];
a0ea8622
SC		 2370 disk = h->gendisk[drv_index];
2371
1da177e4 2372 /* make sure logical volume is NOT is use */
7c832835 2373 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2374 if (drv->usage_count > via_ioctl)
7c832835
BH		 2375 return -EBUSY;
2376 } else if (drv->usage_count > 0)
2377 return -EBUSY;
1da177e4 2378
9cef0d2f
SC		 2379 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2380
ddd47442
MM		 2381 /* invalidate the devices and deregister the disk. If it is disk
2382 * zero do not deregister it but just zero out it's values. This
2383 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2384 */
2385 if (h->gendisk[0] != disk) {
5a9df732 2386 struct request_queue *q = disk->queue;
097d0264 2387 if (disk->flags & GENHD_FL_UP) {
8ce51966 2388 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2389 del_gendisk(disk);
5a9df732 2390 }
9cef0d2f 2391 if (q)
5a9df732 2392 blk_cleanup_queue(q);
5a9df732
AB		 2393 /* If clear_all is set then we are deleting the logical
2394 * drive, not just refreshing its info. For drives
2395 * other than disk 0 we will call put_disk. We do not
2396 * do this for disk 0 as we need it to be able to
2397 * configure the controller.
a72da29b 2398 */
5a9df732
AB		 2399 if (clear_all){
2400 /* This isn't pretty, but we need to find the
2401 * disk in our array and NULL our the pointer.
2402 * This is so that we will call alloc_disk if
2403 * this index is used again later.
a72da29b 2404 */
5a9df732 2405 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2406 if (h->gendisk[i] == disk) {
5a9df732
AB		 2407 h->gendisk[i] = NULL;
2408 break;
799202cb 2409 }
799202cb 2410 }
5a9df732 2411 put_disk(disk);
ddd47442 2412 }
799202cb
MM		 2413 } else {
2414 set_capacity(disk, 0);
9cef0d2f 2415 cciss_clear_drive_info(drv);
ddd47442
MM		 2416 }
2417
2418 --h->num_luns;
ddd47442 2419
9cef0d2f
SC		 2420 /* if it was the last disk, find the new hightest lun */
2421 if (clear_all && recalculate_highest_lun) {
2422 int i, newhighest = -1;
2423 for (i = 0; i <= h->highest_lun; i++) {
2424 /* if the disk has size > 0, it is available */
2425 if (h->drv[i] && h->drv[i]->heads)
2426 newhighest = i;
1da177e4 2427 }
9cef0d2f 2428 h->highest_lun = newhighest;
ddd47442 2429 }
e2019b58 2430 return 0;
1da177e4 2431}
ddd47442 2432
b57695fe 2433static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2434 size_t size, __u8 page_code, unsigned char *scsi3addr,
2435 int cmd_type)
1da177e4 2436{
7c832835 2437 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2438 u64bit buff_dma_handle;
2439 int status = IO_OK;
2440
2441 c->cmd_type = CMD_IOCTL_PEND;
2442 c->Header.ReplyQueue = 0;
7c832835 2443 if (buff != NULL) {
1da177e4 2444 c->Header.SGList = 1;
7c832835 2445 c->Header.SGTotal = 1;
1da177e4
LT		 2446 } else {
2447 c->Header.SGList = 0;
7c832835 2448 c->Header.SGTotal = 0;
1da177e4
LT		 2449 }
2450 c->Header.Tag.lower = c->busaddr;
b57695fe 2451 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2452
2453 c->Request.Type.Type = cmd_type;
2454 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2455 switch (cmd) {
2456 case CISS_INQUIRY:
1da177e4 2457 /* are we trying to read a vital product page */
7c832835 2458 if (page_code != 0) {
1da177e4
LT		 2459 c->Request.CDB[1] = 0x01;
2460 c->Request.CDB[2] = page_code;
2461 }
2462 c->Request.CDBLen = 6;
7c832835 2463 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2464 c->Request.Type.Direction = XFER_READ;
2465 c->Request.Timeout = 0;
7c832835
BH		 2466 c->Request.CDB[0] = CISS_INQUIRY;
2467 c->Request.CDB[4] = size & 0xFF;
2468 break;
1da177e4
LT		 2469 case CISS_REPORT_LOG:
2470 case CISS_REPORT_PHYS:
7c832835 2471 /* Talking to controller so It's a physical command
1da177e4 2472 mode = 00 target = 0. Nothing to write.
7c832835 2473 */
1da177e4
LT		 2474 c->Request.CDBLen = 12;
2475 c->Request.Type.Attribute = ATTR_SIMPLE;
2476 c->Request.Type.Direction = XFER_READ;
2477 c->Request.Timeout = 0;
2478 c->Request.CDB[0] = cmd;
b028461d 2479 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
1da177e4
LT		 2480 c->Request.CDB[7] = (size >> 16) & 0xFF;
2481 c->Request.CDB[8] = (size >> 8) & 0xFF;
2482 c->Request.CDB[9] = size & 0xFF;
2483 break;
2484
2485 case CCISS_READ_CAPACITY:
1da177e4
LT		 2486 c->Request.CDBLen = 10;
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;
7c832835 2491 break;
00988a35 2492 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2493 c->Request.CDBLen = 16;
2494 c->Request.Type.Attribute = ATTR_SIMPLE;
2495 c->Request.Type.Direction = XFER_READ;
2496 c->Request.Timeout = 0;
2497 c->Request.CDB[0] = cmd;
2498 c->Request.CDB[1] = 0x10;
2499 c->Request.CDB[10] = (size >> 24) & 0xFF;
2500 c->Request.CDB[11] = (size >> 16) & 0xFF;
2501 c->Request.CDB[12] = (size >> 8) & 0xFF;
2502 c->Request.CDB[13] = size & 0xFF;
2503 c->Request.Timeout = 0;
2504 c->Request.CDB[0] = cmd;
2505 break;
1da177e4
LT		 2506 case CCISS_CACHE_FLUSH:
2507 c->Request.CDBLen = 12;
2508 c->Request.Type.Attribute = ATTR_SIMPLE;
2509 c->Request.Type.Direction = XFER_WRITE;
2510 c->Request.Timeout = 0;
2511 c->Request.CDB[0] = BMIC_WRITE;
2512 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2513 break;
88f627ae 2514 case TEST_UNIT_READY:
88f627ae
SC		 2515 c->Request.CDBLen = 6;
2516 c->Request.Type.Attribute = ATTR_SIMPLE;
2517 c->Request.Type.Direction = XFER_NONE;
2518 c->Request.Timeout = 0;
2519 break;
1da177e4
LT		 2520 default:
2521 printk(KERN_WARNING
7c832835 2522 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2523 return IO_ERROR;
1da177e4
LT		 2524 }
2525 } else if (cmd_type == TYPE_MSG) {
2526 switch (cmd) {
7c832835 2527 case 0: /* ABORT message */
3da8b713 2528 c->Request.CDBLen = 12;
2529 c->Request.Type.Attribute = ATTR_SIMPLE;
2530 c->Request.Type.Direction = XFER_WRITE;
2531 c->Request.Timeout = 0;
7c832835
BH		 2532 c->Request.CDB[0] = cmd; /* abort */
2533 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2534 /* buff contains the tag of the command to abort */
2535 memcpy(&c->Request.CDB[4], buff, 8);
2536 break;
7c832835 2537 case 1: /* RESET message */
88f627ae 2538 c->Request.CDBLen = 16;
3da8b713 2539 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2540 c->Request.Type.Direction = XFER_NONE;
3da8b713 2541 c->Request.Timeout = 0;
2542 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2543 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2544 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2545 break;
1da177e4
LT		 2546 case 3: /* No-Op message */
2547 c->Request.CDBLen = 1;
2548 c->Request.Type.Attribute = ATTR_SIMPLE;
2549 c->Request.Type.Direction = XFER_WRITE;
2550 c->Request.Timeout = 0;
2551 c->Request.CDB[0] = cmd;
2552 break;
2553 default:
2554 printk(KERN_WARNING
7c832835 2555 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2556 return IO_ERROR;
2557 }
2558 } else {
2559 printk(KERN_WARNING
7c832835 2560 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2561 return IO_ERROR;
2562 }
2563 /* Fill in the scatter gather information */
2564 if (size > 0) {
2565 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2566 buff, size,
2567 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2568 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2569 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2570 c->SG[0].Len = size;
7c832835 2571 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2572 }
2573 return status;
2574}
7c832835 2575
3c2ab402 2576static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2577{
2578 switch (c->err_info->ScsiStatus) {
2579 case SAM_STAT_GOOD:
2580 return IO_OK;
2581 case SAM_STAT_CHECK_CONDITION:
2582 switch (0xf & c->err_info->SenseInfo[2]) {
2583 case 0: return IO_OK; /* no sense */
2584 case 1: return IO_OK; /* recovered error */
2585 default:
c08fac65
SC		 2586 if (check_for_unit_attention(h, c))
2587 return IO_NEEDS_RETRY;
3c2ab402 2588 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2589 "check condition, sense key = 0x%02x\n",
2590 h->ctlr, c->Request.CDB[0],
2591 c->err_info->SenseInfo[2]);
2592 }
2593 break;
2594 default:
2595 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2596 "scsi status = 0x%02x\n", h->ctlr,
2597 c->Request.CDB[0], c->err_info->ScsiStatus);
2598 break;
2599 }
2600 return IO_ERROR;
2601}
2602
789a424a 2603static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2604{
5390cfc3 2605 int return_status = IO_OK;
7c832835 2606
789a424a 2607 if (c->err_info->CommandStatus == CMD_SUCCESS)
2608 return IO_OK;
5390cfc3 2609
2610 switch (c->err_info->CommandStatus) {
2611 case CMD_TARGET_STATUS:
3c2ab402 2612 return_status = check_target_status(h, c);
5390cfc3 2613 break;
2614 case CMD_DATA_UNDERRUN:
2615 case CMD_DATA_OVERRUN:
2616 /* expected for inquiry and report lun commands */
2617 break;
2618 case CMD_INVALID:
789a424a 2619 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2620 "reported invalid\n", c->Request.CDB[0]);
2621 return_status = IO_ERROR;
2622 break;
2623 case CMD_PROTOCOL_ERR:
2624 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2625 "protocol error \n", c->Request.CDB[0]);
2626 return_status = IO_ERROR;
2627 break;
2628 case CMD_HARDWARE_ERR:
2629 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2630 " hardware error\n", c->Request.CDB[0]);
2631 return_status = IO_ERROR;
2632 break;
2633 case CMD_CONNECTION_LOST:
2634 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2635 "connection lost\n", c->Request.CDB[0]);
2636 return_status = IO_ERROR;
2637 break;
2638 case CMD_ABORTED:
2639 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2640 "aborted\n", c->Request.CDB[0]);
2641 return_status = IO_ERROR;
2642 break;
2643 case CMD_ABORT_FAILED:
2644 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2645 "abort failed\n", c->Request.CDB[0]);
2646 return_status = IO_ERROR;
2647 break;
2648 case CMD_UNSOLICITED_ABORT:
2649 printk(KERN_WARNING
2650 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2651 c->Request.CDB[0]);
789a424a 2652 return_status = IO_NEEDS_RETRY;
5390cfc3 2653 break;
2654 default:
2655 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2656 "unknown status %x\n", c->Request.CDB[0],
2657 c->err_info->CommandStatus);
2658 return_status = IO_ERROR;
7c832835 2659 }
789a424a 2660 return return_status;
2661}
2662
2663static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2664 int attempt_retry)
2665{
2666 DECLARE_COMPLETION_ONSTACK(wait);
2667 u64bit buff_dma_handle;
2668 unsigned long flags;
2669 int return_status = IO_OK;
2670
2671resend_cmd2:
2672 c->waiting = &wait;
2673 /* Put the request on the tail of the queue and send it */
2674 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2675 addQ(&h->reqQ, c);
2676 h->Qdepth++;
2677 start_io(h);
2678 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2679
2680 wait_for_completion(&wait);
2681
2682 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2683 goto command_done;
2684
2685 return_status = process_sendcmd_error(h, c);
2686
2687 if (return_status == IO_NEEDS_RETRY &&
2688 c->retry_count < MAX_CMD_RETRIES) {
2689 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2690 c->Request.CDB[0]);
2691 c->retry_count++;
2692 /* erase the old error information */
2693 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2694 return_status = IO_OK;
2695 INIT_COMPLETION(wait);
2696 goto resend_cmd2;
2697 }
5390cfc3 2698
2699command_done:
1da177e4 2700 /* unlock the buffers from DMA */
bb2a37bf
MM		 2701 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2702 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2703 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2704 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2705 return return_status;
2706}
2707
b57695fe 2708static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2709 __u8 page_code, unsigned char scsi3addr[],
2710 int cmd_type)
5390cfc3 2711{
2712 ctlr_info_t *h = hba[ctlr];
2713 CommandList_struct *c;
2714 int return_status;
2715
2716 c = cmd_alloc(h, 0);
2717 if (!c)
2718 return -ENOMEM;
b57695fe 2719 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2720 scsi3addr, cmd_type);
5390cfc3 2721 if (return_status == IO_OK)
789a424a 2722 return_status = sendcmd_withirq_core(h, c, 1);
2723
1da177e4 2724 cmd_free(h, c, 0);
7c832835 2725 return return_status;
1da177e4 2726}
7c832835 2727
1da177e4 2728static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 2729 sector_t total_size,
7c832835
BH		 2730 unsigned int block_size,
2731 InquiryData_struct *inq_buff,
2732 drive_info_struct *drv)
1da177e4
LT		 2733{
2734 int return_code;
00988a35 2735 unsigned long t;
b57695fe 2736 unsigned char scsi3addr[8];
00988a35 2737
1da177e4 2738 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2739 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2740 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2741 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2742 if (return_code == IO_OK) {
7c832835 2743 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2744 printk(KERN_WARNING
7c832835
BH		 2745 "cciss: reading geometry failed, volume "
2746 "does not support reading geometry\n");
1da177e4 2747 drv->heads = 255;
b028461d 2748 drv->sectors = 32; /* Sectors per track */
7f42d3b8 2749 drv->cylinders = total_size + 1;
89f97ad1 2750 drv->raid_level = RAID_UNKNOWN;
1da177e4 2751 } else {
1da177e4
LT		 2752 drv->heads = inq_buff->data_byte[6];
2753 drv->sectors = inq_buff->data_byte[7];
2754 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2755 drv->cylinders += inq_buff->data_byte[5];
2756 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2757 }
2758 drv->block_size = block_size;
97c06978 2759 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2760 t = drv->heads * drv->sectors;
2761 if (t > 1) {
97c06978
MMOD		 2762 sector_t real_size = total_size + 1;
2763 unsigned long rem = sector_div(real_size, t);
3f7705ea 2764 if (rem)
97c06978
MMOD		 2765 real_size++;
2766 drv->cylinders = real_size;
1da177e4 2767 }
7c832835 2768 } else { /* Get geometry failed */
1da177e4
LT		 2769 printk(KERN_WARNING "cciss: reading geometry failed\n");
2770 }
1da177e4 2771}
7c832835 2772
1da177e4 2773static void
7b838bde 2774cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
7c832835 2775 unsigned int *block_size)
1da177e4 2776{
00988a35 2777 ReadCapdata_struct *buf;
1da177e4 2778 int return_code;
b57695fe 2779 unsigned char scsi3addr[8];
1aebe187
MK		 2780
2781 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2782 if (!buf) {
00988a35
MMOD		 2783 printk(KERN_WARNING "cciss: out of memory\n");
2784 return;
2785 }
1aebe187 2786
b57695fe 2787 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2788 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2789 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2790 if (return_code == IO_OK) {
4c1f2b31
AV		 2791 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2792 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2793 } else { /* read capacity command failed */
1da177e4
LT		 2794 printk(KERN_WARNING "cciss: read capacity failed\n");
2795 *total_size = 0;
2796 *block_size = BLOCK_SIZE;
2797 }
00988a35 2798 kfree(buf);
00988a35
MMOD		 2799}
2800
7b838bde
SC		 2801static void cciss_read_capacity_16(int ctlr, int logvol,
2802 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD		 2803{
2804 ReadCapdata_struct_16 *buf;
2805 int return_code;
b57695fe 2806 unsigned char scsi3addr[8];
1aebe187
MK		 2807
2808 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2809 if (!buf) {
00988a35
MMOD		 2810 printk(KERN_WARNING "cciss: out of memory\n");
2811 return;
2812 }
1aebe187 2813
b57695fe 2814 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2815 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2816 ctlr, buf, sizeof(ReadCapdata_struct_16),
2817 0, scsi3addr, TYPE_CMD);
00988a35 2818 if (return_code == IO_OK) {
4c1f2b31
AV		 2819 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2820 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2821 } else { /* read capacity command failed */
2822 printk(KERN_WARNING "cciss: read capacity failed\n");
2823 *total_size = 0;
2824 *block_size = BLOCK_SIZE;
2825 }
7b92aadf 2826 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2827 (unsigned long long)*total_size+1, *block_size);
00988a35 2828 kfree(buf);
1da177e4
LT		 2829}
2830
1da177e4
LT		 2831static int cciss_revalidate(struct gendisk *disk)
2832{
2833 ctlr_info_t *h = get_host(disk);
2834 drive_info_struct *drv = get_drv(disk);
2835 int logvol;
7c832835 2836 int FOUND = 0;
1da177e4 2837 unsigned int block_size;
00988a35 2838 sector_t total_size;
1da177e4
LT		 2839 InquiryData_struct *inq_buff = NULL;
2840
7c832835 2841 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2842 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2843 sizeof(drv->LunID)) == 0) {
7c832835 2844 FOUND = 1;
1da177e4
LT		 2845 break;
2846 }
2847 }
2848
7c832835
BH		 2849 if (!FOUND)
2850 return 1;
1da177e4 2851
7c832835
BH		 2852 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2853 if (inq_buff == NULL) {
2854 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2855 return 1;
2856 }
00988a35 2857 if (h->cciss_read == CCISS_READ_10) {
7b838bde 2858 cciss_read_capacity(h->ctlr, logvol,
00988a35
MMOD		 2859 &total_size, &block_size);
2860 } else {
7b838bde 2861 cciss_read_capacity_16(h->ctlr, logvol,
00988a35
MMOD		 2862 &total_size, &block_size);
2863 }
7b838bde 2864 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
7c832835 2865 inq_buff, drv);
1da177e4 2866
e1defc4f 2867 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2868 set_capacity(disk, drv->nr_blocks);
2869
1da177e4
LT		 2870 kfree(inq_buff);
2871 return 0;
2872}
2873
1da177e4
LT		 2874/*
2875 * Map (physical) PCI mem into (virtual) kernel space
2876 */
2877static void __iomem *remap_pci_mem(ulong base, ulong size)
2878{
7c832835
BH		 2879 ulong page_base = ((ulong) base) & PAGE_MASK;
2880 ulong page_offs = ((ulong) base) - page_base;
2881 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2882
7c832835 2883 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2884}
2885
7c832835
BH		 2886/*
2887 * Takes jobs of the Q and sends them to the hardware, then puts it on
2888 * the Q to wait for completion.
2889 */
2890static void start_io(ctlr_info_t *h)
1da177e4
LT		 2891{
2892 CommandList_struct *c;
7c832835 2893
8a3173de
JA		 2894 while (!hlist_empty(&h->reqQ)) {
2895 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2896 /* can't do anything if fifo is full */
2897 if ((h->access.fifo_full(h))) {
2898 printk(KERN_WARNING "cciss: fifo full\n");
2899 break;
2900 }
2901
7c832835 2902 /* Get the first entry from the Request Q */
8a3173de 2903 removeQ(c);
1da177e4 2904 h->Qdepth--;
7c832835
BH		 2905
2906 /* Tell the controller execute command */
1da177e4 2907 h->access.submit_command(h, c);
7c832835
BH		 2908
2909 /* Put job onto the completed Q */
8a3173de 2910 addQ(&h->cmpQ, c);
1da177e4
LT		 2911 }
2912}
7c832835 2913
1da177e4
LT		 2914/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2915/* Zeros out the error record and then resends the command back */
2916/* to the controller */
7c832835 2917static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2918{
2919 /* erase the old error information */
2920 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2921
2922 /* add it to software queue and then send it to the controller */
8a3173de 2923 addQ(&h->reqQ, c);
1da177e4 2924 h->Qdepth++;
7c832835 2925 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2926 h->maxQsinceinit = h->Qdepth;
2927
2928 start_io(h);
2929}
a9925a06 2930
1a614f50
SC		 2931static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2932 unsigned int msg_byte, unsigned int host_byte,
2933 unsigned int driver_byte)
2934{
2935 /* inverse of macros in scsi.h */
2936 return (scsi_status_byte & 0xff) |
2937 ((msg_byte & 0xff) << 8) |
2938 ((host_byte & 0xff) << 16) |
2939 ((driver_byte & 0xff) << 24);
2940}
2941
0a9279cc
MM		 2942static inline int evaluate_target_status(ctlr_info_t *h,
2943 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2944{
2945 unsigned char sense_key;
1a614f50
SC		 2946 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2947 int error_value;
2948
0a9279cc 2949 *retry_cmd = 0;
1a614f50
SC		 2950 /* If we get in here, it means we got "target status", that is, scsi status */
2951 status_byte = cmd->err_info->ScsiStatus;
2952 driver_byte = DRIVER_OK;
2953 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2954
2955 if (blk_pc_request(cmd->rq))
2956 host_byte = DID_PASSTHROUGH;
2957 else
2958 host_byte = DID_OK;
2959
2960 error_value = make_status_bytes(status_byte, msg_byte,
2961 host_byte, driver_byte);
03bbfee5 2962
1a614f50 2963 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2964 if (!blk_pc_request(cmd->rq))
2965 printk(KERN_WARNING "cciss: cmd %p "
2966 "has SCSI Status 0x%x\n",
2967 cmd, cmd->err_info->ScsiStatus);
1a614f50 2968 return error_value;
03bbfee5
MMOD		 2969 }
2970
2971 /* check the sense key */
2972 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2973 /* no status or recovered error */
1a614f50
SC		 2974 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2975 error_value = 0;
03bbfee5 2976
0a9279cc
MM		 2977 if (check_for_unit_attention(h, cmd)) {
2978 *retry_cmd = !blk_pc_request(cmd->rq);
2979 return 0;
2980 }
2981
03bbfee5 2982 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2983 if (error_value != 0)
03bbfee5
MMOD		 2984 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2985 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2986 return error_value;
03bbfee5
MMOD		 2987 }
2988
2989 /* SG_IO or similar, copy sense data back */
2990 if (cmd->rq->sense) {
2991 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2992 cmd->rq->sense_len = cmd->err_info->SenseLen;
2993 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2994 cmd->rq->sense_len);
2995 } else
2996 cmd->rq->sense_len = 0;
2997
1a614f50 2998 return error_value;
03bbfee5
MMOD		 2999}
3000
7c832835 3001/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3002 * buffers for the completed job. Note that this function does not need
3003 * to hold the hba/queue lock.
7c832835
BH		 3004 */
3005static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3006 int timeout)
1da177e4 3007{
1da177e4 3008 int retry_cmd = 0;
198b7660
MMOD		 3009 struct request *rq = cmd->rq;
3010
3011 rq->errors = 0;
7c832835 3012
1da177e4 3013 if (timeout)
1a614f50 3014 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3015
d38ae168
MMOD		 3016 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3017 goto after_error_processing;
7c832835 3018
d38ae168 3019 switch (cmd->err_info->CommandStatus) {
d38ae168 3020 case CMD_TARGET_STATUS:
0a9279cc 3021 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3022 break;
3023 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3024 if (blk_fs_request(cmd->rq)) {
3025 printk(KERN_WARNING "cciss: cmd %p has"
3026 " completed with data underrun "
3027 "reported\n", cmd);
c3a4d78c 3028 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3029 }
d38ae168
MMOD		 3030 break;
3031 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3032 if (blk_fs_request(cmd->rq))
3033 printk(KERN_WARNING "cciss: cmd %p has"
3034 " completed with data overrun "
3035 "reported\n", cmd);
d38ae168
MMOD		 3036 break;
3037 case CMD_INVALID:
3038 printk(KERN_WARNING "cciss: cmd %p is "
3039 "reported invalid\n", cmd);
1a614f50
SC		 3040 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3041 cmd->err_info->CommandStatus, DRIVER_OK,
3042 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3043 break;
3044 case CMD_PROTOCOL_ERR:
3045 printk(KERN_WARNING "cciss: cmd %p has "
3046 "protocol error \n", cmd);
1a614f50
SC		 3047 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3048 cmd->err_info->CommandStatus, DRIVER_OK,
3049 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3050 break;
3051 case CMD_HARDWARE_ERR:
3052 printk(KERN_WARNING "cciss: cmd %p had "
3053 " hardware error\n", cmd);
1a614f50
SC		 3054 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3055 cmd->err_info->CommandStatus, DRIVER_OK,
3056 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3057 break;
3058 case CMD_CONNECTION_LOST:
3059 printk(KERN_WARNING "cciss: cmd %p had "
3060 "connection lost\n", cmd);
1a614f50
SC		 3061 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3062 cmd->err_info->CommandStatus, DRIVER_OK,
3063 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3064 break;
3065 case CMD_ABORTED:
3066 printk(KERN_WARNING "cciss: cmd %p was "
3067 "aborted\n", cmd);
1a614f50
SC		 3068 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3069 cmd->err_info->CommandStatus, DRIVER_OK,
3070 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3071 break;
3072 case CMD_ABORT_FAILED:
3073 printk(KERN_WARNING "cciss: cmd %p reports "
3074 "abort failed\n", cmd);
1a614f50
SC		 3075 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3076 cmd->err_info->CommandStatus, DRIVER_OK,
3077 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3078 break;
3079 case CMD_UNSOLICITED_ABORT:
3080 printk(KERN_WARNING "cciss%d: unsolicited "
3081 "abort %p\n", h->ctlr, cmd);
3082 if (cmd->retry_count < MAX_CMD_RETRIES) {
3083 retry_cmd = 1;
3084 printk(KERN_WARNING
3085 "cciss%d: retrying %p\n", h->ctlr, cmd);
3086 cmd->retry_count++;
3087 } else
3088 printk(KERN_WARNING
3089 "cciss%d: %p retried too "
3090 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3091 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3092 cmd->err_info->CommandStatus, DRIVER_OK,
3093 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3094 break;
3095 case CMD_TIMEOUT:
3096 printk(KERN_WARNING "cciss: cmd %p timedout\n", 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_ERROR);
d38ae168
MMOD		 3100 break;
3101 default:
3102 printk(KERN_WARNING "cciss: cmd %p returned "
3103 "unknown status %x\n", cmd,
3104 cmd->err_info->CommandStatus);
1a614f50
SC		 3105 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3106 cmd->err_info->CommandStatus, DRIVER_OK,
3107 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3108 }
d38ae168
MMOD		 3109
3110after_error_processing:
3111
1da177e4 3112 /* We need to return this command */
7c832835
BH		 3113 if (retry_cmd) {
3114 resend_cciss_cmd(h, cmd);
1da177e4 3115 return;
7c832835 3116 }
03bbfee5 3117 cmd->rq->completion_data = cmd;
a9925a06 3118 blk_complete_request(cmd->rq);
1da177e4
LT		 3119}
3120
7c832835
BH		 3121/*
3122 * Get a request and submit it to the controller.
1da177e4 3123 */
165125e1 3124static void do_cciss_request(struct request_queue *q)
1da177e4 3125{
7c832835 3126 ctlr_info_t *h = q->queuedata;
1da177e4 3127 CommandList_struct *c;
00988a35
MMOD		 3128 sector_t start_blk;
3129 int seg;
1da177e4
LT		 3130 struct request *creq;
3131 u64bit temp64;
5c07a311
DB		 3132 struct scatterlist *tmp_sg;
3133 SGDescriptor_struct *curr_sg;
1da177e4
LT		 3134 drive_info_struct *drv;
3135 int i, dir;
5c07a311
DB		 3136 int nseg = 0;
3137 int sg_index = 0;
3138 int chained = 0;
1da177e4
LT		 3139
3140 /* We call start_io here in case there is a command waiting on the
3141 * queue that has not been sent.
7c832835 3142 */
1da177e4
LT		 3143 if (blk_queue_plugged(q))
3144 goto startio;
3145
7c832835 3146 queue:
9934c8c0 3147 creq = blk_peek_request(q);
1da177e4
LT		 3148 if (!creq)
3149 goto startio;
3150
5c07a311 3151 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
1da177e4 3152
7c832835 3153 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3154 goto full;
3155
9934c8c0 3156 blk_start_request(creq);
1da177e4 3157
5c07a311 3158 tmp_sg = h->scatter_list[c->cmdindex];
1da177e4
LT		 3159 spin_unlock_irq(q->queue_lock);
3160
3161 c->cmd_type = CMD_RWREQ;
3162 c->rq = creq;
7c832835
BH		 3163
3164 /* fill in the request */
1da177e4 3165 drv = creq->rq_disk->private_data;
b028461d 3166 c->Header.ReplyQueue = 0; /* unused in simple mode */
33079b21
MM		 3167 /* got command from pool, so use the command block index instead */
3168 /* for direct lookups. */
3169 /* The first 2 bits are reserved for controller error reporting. */
3170 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3171 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3172 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
b028461d 3173 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3174 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
7c832835
BH		 3175 c->Request.Type.Attribute = ATTR_SIMPLE;
3176 c->Request.Type.Direction =
a52de245 3177 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
b028461d 3178 c->Request.Timeout = 0; /* Don't time out */
7c832835 3179 c->Request.CDB[0] =
00988a35 3180 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3181 start_blk = blk_rq_pos(creq);
1da177e4 3182#ifdef CCISS_DEBUG
83096ebf
TH		 3183 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3184 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3185#endif /* CCISS_DEBUG */
1da177e4 3186
5c07a311 3187 sg_init_table(tmp_sg, h->maxsgentries);
1da177e4
LT		 3188 seg = blk_rq_map_sg(q, creq, tmp_sg);
3189
7c832835 3190 /* get the DMA records for the setup */
1da177e4
LT		 3191 if (c->Request.Type.Direction == XFER_READ)
3192 dir = PCI_DMA_FROMDEVICE;
3193 else
3194 dir = PCI_DMA_TODEVICE;
3195
5c07a311
DB		 3196 curr_sg = c->SG;
3197 sg_index = 0;
3198 chained = 0;
3199
7c832835 3200 for (i = 0; i < seg; i++) {
5c07a311
DB		 3201 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3202 !chained && ((seg - i) > 1)) {
3203 nseg = seg - i;
3204 curr_sg[sg_index].Len = (nseg) *
3205 sizeof(SGDescriptor_struct);
3206 curr_sg[sg_index].Ext = CCISS_SG_CHAIN;
3207
3208 /* Point to next chain block. */
3209 curr_sg = h->cmd_sg_list[c->cmdindex]->sgchain;
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 */
3220
3221 ++sg_index;
1da177e4 3222 }
5c07a311
DB		 3223
3224 if (chained) {
3225 int len;
3226 curr_sg = c->SG;
3227 sg_index = h->max_cmd_sgentries - 1;
3228 len = curr_sg[sg_index].Len;
3229 /* Setup pointer to next chain block.
3230 * Fill out last element in current chain
3231 * block with address of next chain block.
3232 */
3233 temp64.val = pci_map_single(h->pdev,
3234 h->cmd_sg_list[c->cmdindex]->sgchain,
3235 len, dir);
3236
3237 h->cmd_sg_list[c->cmdindex]->sg_chain_dma = temp64.val;
3238 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3239 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3240
3241 pci_dma_sync_single_for_device(h->pdev,
3242 h->cmd_sg_list[c->cmdindex]->sg_chain_dma,
3243 len, dir);
3244 }
3245
7c832835
BH		 3246 /* track how many SG entries we are using */
3247 if (seg > h->maxSG)
3248 h->maxSG = seg;
1da177e4
LT		 3249
3250#ifdef CCISS_DEBUG
5c07a311
DB		 3251 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3252 "chained[%d]\n",
3253 blk_rq_sectors(creq), seg, chained);
7c832835 3254#endif /* CCISS_DEBUG */
1da177e4 3255
5c07a311
DB		 3256 c->Header.SGList = c->Header.SGTotal = seg + chained;
3257 if (seg > h->max_cmd_sgentries)
3258 c->Header.SGList = h->max_cmd_sgentries;
3259
03bbfee5
MMOD		 3260 if (likely(blk_fs_request(creq))) {
3261 if(h->cciss_read == CCISS_READ_10) {
3262 c->Request.CDB[1] = 0;
b028461d 3263 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
03bbfee5
MMOD		 3264 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3265 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3266 c->Request.CDB[5] = start_blk & 0xff;
b028461d 3267 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
83096ebf
TH		 3268 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3269 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3270 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3271 } else {
582539e5
RD		 3272 u32 upper32 = upper_32_bits(start_blk);
3273
03bbfee5
MMOD		 3274 c->Request.CDBLen = 16;
3275 c->Request.CDB[1]= 0;
b028461d 3276 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
582539e5
RD		 3277 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3278 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3279 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3280 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3281 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3282 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3283 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3284 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3285 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3286 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3287 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3288 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3289 }
3290 } else if (blk_pc_request(creq)) {
3291 c->Request.CDBLen = creq->cmd_len;
3292 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3293 } else {
03bbfee5
MMOD		 3294 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3295 BUG();
00988a35 3296 }
1da177e4
LT		 3297
3298 spin_lock_irq(q->queue_lock);
3299
8a3173de 3300 addQ(&h->reqQ, c);
1da177e4 3301 h->Qdepth++;
7c832835
BH		 3302 if (h->Qdepth > h->maxQsinceinit)
3303 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3304
3305 goto queue;
00988a35 3306full:
1da177e4 3307 blk_stop_queue(q);
00988a35 3308startio:
1da177e4
LT		 3309 /* We will already have the driver lock here so not need
3310 * to lock it.
7c832835 3311 */
1da177e4
LT		 3312 start_io(h);
3313}
3314
3da8b713 3315static inline unsigned long get_next_completion(ctlr_info_t *h)
3316{
3da8b713 3317 return h->access.command_completed(h);
3da8b713 3318}
3319
3320static inline int interrupt_pending(ctlr_info_t *h)
3321{
3da8b713 3322 return h->access.intr_pending(h);
3da8b713 3323}
3324
3325static inline long interrupt_not_for_us(ctlr_info_t *h)
3326{
7c832835 3327 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3328 (h->interrupts_enabled == 0)));
3da8b713 3329}
3330
7d12e780 3331static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3332{
3333 ctlr_info_t *h = dev_id;
3334 CommandList_struct *c;
3335 unsigned long flags;
33079b21 3336 __u32 a, a1, a2;
1da177e4 3337
3da8b713 3338 if (interrupt_not_for_us(h))
1da177e4 3339 return IRQ_NONE;
1da177e4
LT		 3340 /*
3341 * If there are completed commands in the completion queue,
3342 * we had better do something about it.
3343 */
3344 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3345 while (interrupt_pending(h)) {
7c832835 3346 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3347 a1 = a;
33079b21
MM		 3348 if ((a & 0x04)) {
3349 a2 = (a >> 3);
f880632f 3350 if (a2 >= h->nr_cmds) {
7c832835
BH		 3351 printk(KERN_WARNING
3352 "cciss: controller cciss%d failed, stopping.\n",
3353 h->ctlr);
33079b21
MM		 3354 fail_all_cmds(h->ctlr);
3355 return IRQ_HANDLED;
3356 }
3357
3358 c = h->cmd_pool + a2;
3359 a = c->busaddr;
3360
3361 } else {
8a3173de
JA		 3362 struct hlist_node *tmp;
3363
7c832835 3364 a &= ~3;
8a3173de
JA		 3365 c = NULL;
3366 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3367 if (c->busaddr == a)
7c832835
BH		 3368 break;
3369 }
33079b21 3370 }
1da177e4
LT		 3371 /*
3372 * If we've found the command, take it off the
3373 * completion Q and free it
3374 */
8a3173de
JA		 3375 if (c && c->busaddr == a) {
3376 removeQ(c);
1da177e4
LT		 3377 if (c->cmd_type == CMD_RWREQ) {
3378 complete_command(h, c, 0);
3379 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3380 complete(c->waiting);
3381 }
3382# ifdef CONFIG_CISS_SCSI_TAPE
3383 else if (c->cmd_type == CMD_SCSI)
3384 complete_scsi_command(c, 0, a1);
3385# endif
3386 continue;
3387 }
3388 }
3389 }
3390
1da177e4
LT		 3391 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3392 return IRQ_HANDLED;
3393}
7c832835 3394
b368c9dd
AP		 3395/**
3396 * add_to_scan_list() - add controller to rescan queue
3397 * @h: Pointer to the controller.
3398 *
3399 * Adds the controller to the rescan queue if not already on the queue.
3400 *
3401 * returns 1 if added to the queue, 0 if skipped (could be on the
3402 * queue already, or the controller could be initializing or shutting
3403 * down).
3404 **/
3405static int add_to_scan_list(struct ctlr_info *h)
3406{
3407 struct ctlr_info *test_h;
3408 int found = 0;
3409 int ret = 0;
3410
3411 if (h->busy_initializing)
3412 return 0;
3413
3414 if (!mutex_trylock(&h->busy_shutting_down))
3415 return 0;
3416
3417 mutex_lock(&scan_mutex);
3418 list_for_each_entry(test_h, &scan_q, scan_list) {
3419 if (test_h == h) {
3420 found = 1;
3421 break;
3422 }
3423 }
3424 if (!found && !h->busy_scanning) {
3425 INIT_COMPLETION(h->scan_wait);
3426 list_add_tail(&h->scan_list, &scan_q);
3427 ret = 1;
3428 }
3429 mutex_unlock(&scan_mutex);
3430 mutex_unlock(&h->busy_shutting_down);
3431
3432 return ret;
3433}
3434
3435/**
3436 * remove_from_scan_list() - remove controller from rescan queue
3437 * @h: Pointer to the controller.
3438 *
3439 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC		 3440 * the controller is currently conducting a rescan. The controller
3441 * can be in one of three states:
3442 * 1. Doesn't need a scan
3443 * 2. On the scan list, but not scanning yet (we remove it)
3444 * 3. Busy scanning (and not on the list). In this case we want to wait for
3445 * the scan to complete to make sure the scanning thread for this
3446 * controller is completely idle.
b368c9dd
AP		 3447 **/
3448static void remove_from_scan_list(struct ctlr_info *h)
3449{
3450 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP		 3451
3452 mutex_lock(&scan_mutex);
3453 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3454 if (test_h == h) { /* state 2. */
b368c9dd
AP		 3455 list_del(&h->scan_list);
3456 complete_all(&h->scan_wait);
3457 mutex_unlock(&scan_mutex);
3458 return;
3459 }
3460 }
fd8489cf
SC		 3461 if (h->busy_scanning) { /* state 3. */
3462 mutex_unlock(&scan_mutex);
b368c9dd 3463 wait_for_completion(&h->scan_wait);
fd8489cf
SC		 3464 } else { /* state 1, nothing to do. */
3465 mutex_unlock(&scan_mutex);
3466 }
b368c9dd
AP		 3467}
3468
3469/**
3470 * scan_thread() - kernel thread used to rescan controllers
3471 * @data: Ignored.
3472 *
3473 * A kernel thread used scan for drive topology changes on
3474 * controllers. The thread processes only one controller at a time
3475 * using a queue. Controllers are added to the queue using
3476 * add_to_scan_list() and removed from the queue either after done
3477 * processing or using remove_from_scan_list().
3478 *
3479 * returns 0.
3480 **/
0a9279cc
MM		 3481static int scan_thread(void *data)
3482{
b368c9dd 3483 struct ctlr_info *h;
0a9279cc 3484
b368c9dd
AP		 3485 while (1) {
3486 set_current_state(TASK_INTERRUPTIBLE);
3487 schedule();
0a9279cc
MM		 3488 if (kthread_should_stop())
3489 break;
b368c9dd
AP		 3490
3491 while (1) {
3492 mutex_lock(&scan_mutex);
3493 if (list_empty(&scan_q)) {
3494 mutex_unlock(&scan_mutex);
3495 break;
3496 }
3497
3498 h = list_entry(scan_q.next,
3499 struct ctlr_info,
3500 scan_list);
3501 list_del(&h->scan_list);
3502 h->busy_scanning = 1;
3503 mutex_unlock(&scan_mutex);
3504
d06dfbd2
SC		 3505 rebuild_lun_table(h, 0, 0);
3506 complete_all(&h->scan_wait);
3507 mutex_lock(&scan_mutex);
3508 h->busy_scanning = 0;
3509 mutex_unlock(&scan_mutex);
b368c9dd 3510 }
0a9279cc 3511 }
b368c9dd 3512
0a9279cc
MM		 3513 return 0;
3514}
3515
3516static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3517{
3518 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3519 return 0;
3520
3521 switch (c->err_info->SenseInfo[12]) {
3522 case STATE_CHANGED:
3523 printk(KERN_WARNING "cciss%d: a state change "
3524 "detected, command retried\n", h->ctlr);
3525 return 1;
3526 break;
3527 case LUN_FAILED:
3528 printk(KERN_WARNING "cciss%d: LUN failure "
3529 "detected, action required\n", h->ctlr);
3530 return 1;
3531 break;
3532 case REPORT_LUNS_CHANGED:
3533 printk(KERN_WARNING "cciss%d: report LUN data "
3534 "changed\n", h->ctlr);
da002184
SC		 3535 /*
3536 * Here, we could call add_to_scan_list and wake up the scan thread,
3537 * except that it's quite likely that we will get more than one
3538 * REPORT_LUNS_CHANGED condition in quick succession, which means
3539 * that those which occur after the first one will likely happen
3540 * *during* the scan_thread's rescan. And the rescan code is not
3541 * robust enough to restart in the middle, undoing what it has already
3542 * done, and it's not clear that it's even possible to do this, since
3543 * part of what it does is notify the block layer, which starts
3544 * doing it's own i/o to read partition tables and so on, and the
3545 * driver doesn't have visibility to know what might need undoing.
3546 * In any event, if possible, it is horribly complicated to get right
3547 * so we just don't do it for now.
3548 *
3549 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3550 */
0a9279cc
MM		 3551 return 1;
3552 break;
3553 case POWER_OR_RESET:
3554 printk(KERN_WARNING "cciss%d: a power on "
3555 "or device reset detected\n", h->ctlr);
3556 return 1;
3557 break;
3558 case UNIT_ATTENTION_CLEARED:
3559 printk(KERN_WARNING "cciss%d: unit attention "
3560 "cleared by another initiator\n", h->ctlr);
3561 return 1;
3562 break;
3563 default:
3564 printk(KERN_WARNING "cciss%d: unknown "
3565 "unit attention detected\n", h->ctlr);
3566 return 1;
3567 }
3568}
3569
7c832835 3570/*
d14c4ab5 3571 * We cannot read the structure directly, for portability we must use
1da177e4 3572 * the io functions.
7c832835 3573 * This is for debug only.
1da177e4
LT		 3574 */
3575#ifdef CCISS_DEBUG
7c832835 3576static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3577{
3578 int i;
3579 char temp_name[17];
3580
3581 printk("Controller Configuration information\n");
3582 printk("------------------------------------\n");
7c832835 3583 for (i = 0; i < 4; i++)
1da177e4 3584 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3585 temp_name[4] = '\0';
3586 printk(" Signature = %s\n", temp_name);
1da177e4 3587 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3588 printk(" Transport methods supported = 0x%x\n",
3589 readl(&(tb->TransportSupport)));
3590 printk(" Transport methods active = 0x%x\n",
3591 readl(&(tb->TransportActive)));
3592 printk(" Requested transport Method = 0x%x\n",
3593 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3594 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3595 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3596 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3597 readl(&(tb->HostWrite.CoalIntCount)));
3598 printk(" Max outstanding commands = 0x%d\n",
3599 readl(&(tb->CmdsOutMax)));
3600 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3601 for (i = 0; i < 16; i++)
1da177e4
LT		 3602 temp_name[i] = readb(&(tb->ServerName[i]));
3603 temp_name[16] = '\0';
3604 printk(" Server Name = %s\n", temp_name);
7c832835 3605 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3606}
7c832835 3607#endif /* CCISS_DEBUG */
1da177e4 3608
7c832835 3609static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3610{
3611 int i, offset, mem_type, bar_type;
7c832835 3612 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3613 return 0;
3614 offset = 0;
7c832835
BH		 3615 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3616 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3617 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3618 offset += 4;
3619 else {
3620 mem_type = pci_resource_flags(pdev, i) &
7c832835 3621 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3622 switch (mem_type) {
7c832835
BH		 3623 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3624 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3625 offset += 4; /* 32 bit */
3626 break;
3627 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3628 offset += 8;
3629 break;
3630 default: /* reserved in PCI 2.2 */
3631 printk(KERN_WARNING
3632 "Base address is invalid\n");
3633 return -1;
1da177e4
LT		 3634 break;
3635 }
3636 }
7c832835
BH		 3637 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3638 return i + 1;
1da177e4
LT		 3639 }
3640 return -1;
3641}
3642
fb86a35b
MM		 3643/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3644 * controllers that are capable. If not, we use IO-APIC mode.
3645 */
3646
7c832835
BH		 3647static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3648 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3649{
3650#ifdef CONFIG_PCI_MSI
7c832835
BH		 3651 int err;
3652 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3653 {0, 2}, {0, 3}
3654 };
fb86a35b
MM		 3655
3656 /* Some boards advertise MSI but don't really support it */
3657 if ((board_id == 0x40700E11) ||
7c832835
BH		 3658 (board_id == 0x40800E11) ||
3659 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3660 goto default_int_mode;
3661
7c832835
BH		 3662 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3663 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3664 if (!err) {
3665 c->intr[0] = cciss_msix_entries[0].vector;
3666 c->intr[1] = cciss_msix_entries[1].vector;
3667 c->intr[2] = cciss_msix_entries[2].vector;
3668 c->intr[3] = cciss_msix_entries[3].vector;
3669 c->msix_vector = 1;
3670 return;
3671 }
3672 if (err > 0) {
3673 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3674 "available\n", err);
1ecb9c0f 3675 goto default_int_mode;
7c832835
BH		 3676 } else {
3677 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3678 err);
1ecb9c0f 3679 goto default_int_mode;
7c832835
BH		 3680 }
3681 }
3682 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3683 if (!pci_enable_msi(pdev)) {
7c832835 3684 c->msi_vector = 1;
7c832835
BH		 3685 } else {
3686 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3687 }
3688 }
1ecb9c0f 3689default_int_mode:
7c832835 3690#endif /* CONFIG_PCI_MSI */
fb86a35b 3691 /* if we get here we're going to use the default interrupt mode */
7c832835 3692 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3693 return;
3694}
3695
7d1fd970 3696static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3697{
3698 ushort subsystem_vendor_id, subsystem_device_id, command;
3699 __u32 board_id, scratchpad = 0;
3700 __u64 cfg_offset;
3701 __u32 cfg_base_addr;
3702 __u64 cfg_base_addr_index;
2ec24ff1
SC		 3703 int i, prod_index, err;
3704
3705 subsystem_vendor_id = pdev->subsystem_vendor;
3706 subsystem_device_id = pdev->subsystem_device;
3707 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3708 subsystem_vendor_id);
3709
3710 for (i = 0; i < ARRAY_SIZE(products); i++) {
3711 /* Stand aside for hpsa driver on request */
3712 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3713 return -ENODEV;
3714 if (board_id == products[i].board_id)
3715 break;
3716 }
3717 prod_index = i;
3718 if (prod_index == ARRAY_SIZE(products)) {
3719 dev_warn(&pdev->dev,
3720 "unrecognized board ID: 0x%08lx, ignoring.\n",
3721 (unsigned long) board_id);
3722 return -ENODEV;
3723 }
1da177e4
LT		 3724
3725 /* check to see if controller has been disabled */
3726 /* BEFORE trying to enable it */
7c832835
BH		 3727 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3728 if (!(command & 0x02)) {
3729 printk(KERN_WARNING
3730 "cciss: controller appears to be disabled\n");
c33ac89b 3731 return -ENODEV;
1da177e4
LT		 3732 }
3733
c33ac89b 3734 err = pci_enable_device(pdev);
7c832835 3735 if (err) {
1da177e4 3736 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3737 return err;
1da177e4 3738 }
1da177e4 3739
4e570309
BH		 3740 err = pci_request_regions(pdev, "cciss");
3741 if (err) {
3742 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3743 "aborting\n");
872225ca 3744 return err;
4e570309
BH		 3745 }
3746
1da177e4
LT		 3747#ifdef CCISS_DEBUG
3748 printk("command = %x\n", command);
3749 printk("irq = %x\n", pdev->irq);
3750 printk("board_id = %x\n", board_id);
7c832835 3751#endif /* CCISS_DEBUG */
1da177e4 3752
fb86a35b
MM		 3753/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3754 * else we use the IO-APIC interrupt assigned to us by system ROM.
3755 */
3756 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3757
e1438581
MM		 3758 /* find the memory BAR */
3759 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3760 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3761 break;
3762 }
3763 if (i == DEVICE_COUNT_RESOURCE) {
3764 printk(KERN_WARNING "cciss: No memory BAR found\n");
3765 err = -ENODEV;
3766 goto err_out_free_res;
3767 }
3768
3769 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3770 * already removed
3771 */
1da177e4 3772
1da177e4 3773#ifdef CCISS_DEBUG
9f92f471 3774 printk("address 0 = %lx\n", c->paddr);
7c832835 3775#endif /* CCISS_DEBUG */
a5b92873 3776 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3777
3778 /* Wait for the board to become ready. (PCI hotplug needs this.)
3779 * We poll for up to 120 secs, once per 100ms. */
7c832835 3780 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3781 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3782 if (scratchpad == CCISS_FIRMWARE_READY)
3783 break;
3784 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3785 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3786 }
3787 if (scratchpad != CCISS_FIRMWARE_READY) {
3788 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3789 err = -ENODEV;
4e570309 3790 goto err_out_free_res;
1da177e4
LT		 3791 }
3792
3793 /* get the address index number */
3794 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3795 cfg_base_addr &= (__u32) 0x0000ffff;
3796#ifdef CCISS_DEBUG
3797 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3798#endif /* CCISS_DEBUG */
3799 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3800#ifdef CCISS_DEBUG
9f92f471
RD		 3801 printk("cfg base address index = %llx\n",
3802 (unsigned long long)cfg_base_addr_index);
7c832835 3803#endif /* CCISS_DEBUG */
1da177e4
LT		 3804 if (cfg_base_addr_index == -1) {
3805 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3806 err = -ENODEV;
4e570309 3807 goto err_out_free_res;
1da177e4
LT		 3808 }
3809
3810 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3811#ifdef CCISS_DEBUG
9f92f471 3812 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3813#endif /* CCISS_DEBUG */
3814 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3815 cfg_base_addr_index) +
3816 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3817 c->board_id = board_id;
3818
3819#ifdef CCISS_DEBUG
945f390f 3820 print_cfg_table(c->cfgtable);
7c832835 3821#endif /* CCISS_DEBUG */
1da177e4 3822
49153998
MM		 3823 /* Some controllers support Zero Memory Raid (ZMR).
3824 * When configured in ZMR mode the number of supported
3825 * commands drops to 64. So instead of just setting an
3826 * arbitrary value we make the driver a little smarter.
3827 * We read the config table to tell us how many commands
3828 * are supported on the controller then subtract 4 to
3829 * leave a little room for ioctl calls.
3830 */
3831 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
5c07a311
DB		 3832 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
3833
3834 /*
3835 * Limit native command to 32 s/g elements to save dma'able memory.
3836 * Howvever spec says if 0, use 31
3837 */
3838
3839 c->max_cmd_sgentries = 31;
3840 if (c->maxsgentries > 512) {
3841 c->max_cmd_sgentries = 32;
3842 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
3843 c->maxsgentries -= 1; /* account for chain pointer */
3844 } else {
3845 c->maxsgentries = 31; /* Default to traditional value */
3846 c->chainsize = 0; /* traditional */
3847 }
3848
2ec24ff1
SC		 3849 c->product_name = products[prod_index].product_name;
3850 c->access = *(products[prod_index].access);
3851 c->nr_cmds = c->max_commands - 4;
7c832835
BH		 3852 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3853 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3854 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3855 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3856 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3857 err = -ENODEV;
4e570309 3858 goto err_out_free_res;
1da177e4 3859 }
1da177e4 3860#ifdef CONFIG_X86
7c832835
BH		 3861 {
3862 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3863 __u32 prefetch;
3864 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3865 prefetch |= 0x100;
3866 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3867 }
1da177e4
LT		 3868#endif
3869
8bf50f71
MMOD		 3870 /* Disabling DMA prefetch and refetch for the P600.
3871 * An ASIC bug may result in accesses to invalid memory addresses.
3872 * We've disabled prefetch for some time now. Testing with XEN
3873 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3874 */
3875 if(board_id == 0x3225103C) {
3876 __u32 dma_prefetch;
8bf50f71 3877 __u32 dma_refetch;
f92e2f5f
MM		 3878 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3879 dma_prefetch |= 0x8000;
3880 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3881 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3882 dma_refetch |= 0x1;
3883 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3884 }
3885
1da177e4
LT		 3886#ifdef CCISS_DEBUG
3887 printk("Trying to put board into Simple mode\n");
7c832835 3888#endif /* CCISS_DEBUG */
1da177e4 3889 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3890 /* Update the field, and then ring the doorbell */
3891 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3892 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3893
3894 /* under certain very rare conditions, this can take awhile.
3895 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3896 * as we enter this code.) */
7c832835 3897 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3898 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3899 break;
3900 /* delay and try again */
3901 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3902 schedule_timeout(msecs_to_jiffies(1));
7c832835 3903 }
1da177e4
LT		 3904
3905#ifdef CCISS_DEBUG
7c832835
BH		 3906 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3907 readl(c->vaddr + SA5_DOORBELL));
3908#endif /* CCISS_DEBUG */
1da177e4 3909#ifdef CCISS_DEBUG
7c832835
BH		 3910 print_cfg_table(c->cfgtable);
3911#endif /* CCISS_DEBUG */
1da177e4 3912
7c832835 3913 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3914 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3915 " simple mode\n");
c33ac89b 3916 err = -ENODEV;
4e570309 3917 goto err_out_free_res;
1da177e4
LT		 3918 }
3919 return 0;
3920
5faad620 3921err_out_free_res:
872225ca
MM		 3922 /*
3923 * Deliberately omit pci_disable_device(): it does something nasty to
3924 * Smart Array controllers that pci_enable_device does not undo
3925 */
4e570309 3926 pci_release_regions(pdev);
c33ac89b 3927 return err;
1da177e4
LT		 3928}
3929
6ae5ce8e
MM		 3930/* Function to find the first free pointer into our hba[] array
3931 * Returns -1 if no free entries are left.
7c832835 3932 */
1da177e4
LT		 3933static int alloc_cciss_hba(void)
3934{
799202cb 3935 int i;
1da177e4 3936
7c832835 3937 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3938 if (!hba[i]) {
3939 ctlr_info_t *p;
f2912a12 3940
06ff37ff 3941 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3942 if (!p)
3943 goto Enomem;
1da177e4
LT		 3944 hba[i] = p;
3945 return i;
3946 }
3947 }
3948 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3949 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3950 return -1;
3951Enomem:
1da177e4 3952 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3953 return -1;
3954}
3955
2c935593 3956static void free_hba(int n)
1da177e4 3957{
2c935593
SC		 3958 ctlr_info_t *h = hba[n];
3959 int i;
1da177e4 3960
2c935593
SC		 3961 hba[n] = NULL;
3962 for (i = 0; i < h->highest_lun + 1; i++)
3963 if (h->gendisk[i] != NULL)
3964 put_disk(h->gendisk[i]);
3965 kfree(h);
1da177e4
LT		 3966}
3967
82eb03cf
CC		 3968/* Send a message CDB to the firmware. */
3969static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3970{
3971 typedef struct {
3972 CommandListHeader_struct CommandHeader;
3973 RequestBlock_struct Request;
3974 ErrDescriptor_struct ErrorDescriptor;
3975 } Command;
3976 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3977 Command *cmd;
3978 dma_addr_t paddr64;
3979 uint32_t paddr32, tag;
3980 void __iomem *vaddr;
3981 int i, err;
3982
3983 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3984 if (vaddr == NULL)
3985 return -ENOMEM;
3986
3987 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3988 CCISS commands, so they must be allocated from the lower 4GiB of
3989 memory. */
e930438c 3990 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3991 if (err) {
3992 iounmap(vaddr);
3993 return -ENOMEM;
3994 }
3995
3996 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3997 if (cmd == NULL) {
3998 iounmap(vaddr);
3999 return -ENOMEM;
4000 }
4001
4002 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4003 although there's no guarantee, we assume that the address is at
4004 least 4-byte aligned (most likely, it's page-aligned). */
4005 paddr32 = paddr64;
4006
4007 cmd->CommandHeader.ReplyQueue = 0;
4008 cmd->CommandHeader.SGList = 0;
4009 cmd->CommandHeader.SGTotal = 0;
4010 cmd->CommandHeader.Tag.lower = paddr32;
4011 cmd->CommandHeader.Tag.upper = 0;
4012 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4013
4014 cmd->Request.CDBLen = 16;
4015 cmd->Request.Type.Type = TYPE_MSG;
4016 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4017 cmd->Request.Type.Direction = XFER_NONE;
4018 cmd->Request.Timeout = 0; /* Don't time out */
4019 cmd->Request.CDB[0] = opcode;
4020 cmd->Request.CDB[1] = type;
4021 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4022
4023 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4024 cmd->ErrorDescriptor.Addr.upper = 0;
4025 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4026
4027 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4028
4029 for (i = 0; i < 10; i++) {
4030 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4031 if ((tag & ~3) == paddr32)
4032 break;
4033 schedule_timeout_uninterruptible(HZ);
4034 }
4035
4036 iounmap(vaddr);
4037
4038 /* we leak the DMA buffer here ... no choice since the controller could
4039 still complete the command. */
4040 if (i == 10) {
4041 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4042 opcode, type);
4043 return -ETIMEDOUT;
4044 }
4045
4046 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4047
4048 if (tag & 2) {
4049 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4050 opcode, type);
4051 return -EIO;
4052 }
4053
4054 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4055 opcode, type);
4056 return 0;
4057}
4058
4059#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4060#define cciss_noop(p) cciss_message(p, 3, 0)
4061
4062static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4063{
4064/* the #defines are stolen from drivers/pci/msi.h. */
4065#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4066#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4067
4068 int pos;
4069 u16 control = 0;
4070
4071 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4072 if (pos) {
4073 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4074 if (control & PCI_MSI_FLAGS_ENABLE) {
4075 printk(KERN_INFO "cciss: resetting MSI\n");
4076 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4077 }
4078 }
4079
4080 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4081 if (pos) {
4082 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4083 if (control & PCI_MSIX_FLAGS_ENABLE) {
4084 printk(KERN_INFO "cciss: resetting MSI-X\n");
4085 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4086 }
4087 }
4088
4089 return 0;
4090}
4091
4092/* This does a hard reset of the controller using PCI power management
4093 * states. */
4094static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4095{
4096 u16 pmcsr, saved_config_space[32];
4097 int i, pos;
4098
4099 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4100
4101 /* This is very nearly the same thing as
4102
4103 pci_save_state(pci_dev);
4104 pci_set_power_state(pci_dev, PCI_D3hot);
4105 pci_set_power_state(pci_dev, PCI_D0);
4106 pci_restore_state(pci_dev);
4107
4108 but we can't use these nice canned kernel routines on
4109 kexec, because they also check the MSI/MSI-X state in PCI
4110 configuration space and do the wrong thing when it is
4111 set/cleared. Also, the pci_save/restore_state functions
4112 violate the ordering requirements for restoring the
4113 configuration space from the CCISS document (see the
4114 comment below). So we roll our own .... */
4115
4116 for (i = 0; i < 32; i++)
4117 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4118
4119 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4120 if (pos == 0) {
4121 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4122 return -ENODEV;
4123 }
4124
4125 /* Quoting from the Open CISS Specification: "The Power
4126 * Management Control/Status Register (CSR) controls the power
4127 * state of the device. The normal operating state is D0,
4128 * CSR=00h. The software off state is D3, CSR=03h. To reset
4129 * the controller, place the interface device in D3 then to
4130 * D0, this causes a secondary PCI reset which will reset the
4131 * controller." */
4132
4133 /* enter the D3hot power management state */
4134 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4135 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4136 pmcsr |= PCI_D3hot;
4137 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4138
4139 schedule_timeout_uninterruptible(HZ >> 1);
4140
4141 /* enter the D0 power management state */
4142 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4143 pmcsr |= PCI_D0;
4144 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4145
4146 schedule_timeout_uninterruptible(HZ >> 1);
4147
4148 /* Restore the PCI configuration space. The Open CISS
4149 * Specification says, "Restore the PCI Configuration
4150 * Registers, offsets 00h through 60h. It is important to
4151 * restore the command register, 16-bits at offset 04h,
4152 * last. Do not restore the configuration status register,
4153 * 16-bits at offset 06h." Note that the offset is 2*i. */
4154 for (i = 0; i < 32; i++) {
4155 if (i == 2 || i == 3)
4156 continue;
4157 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4158 }
4159 wmb();
4160 pci_write_config_word(pdev, 4, saved_config_space[2]);
4161
4162 return 0;
4163}
4164
1da177e4
LT		 4165/*
4166 * This is it. Find all the controllers and register them. I really hate
4167 * stealing all these major device numbers.
4168 * returns the number of block devices registered.
4169 */
4170static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4171 const struct pci_device_id *ent)
1da177e4 4172{
1da177e4 4173 int i;
799202cb 4174 int j = 0;
5c07a311 4175 int k = 0;
1da177e4 4176 int rc;
22bece00 4177 int dac, return_code;
212a5026 4178 InquiryData_struct *inq_buff;
1da177e4 4179
82eb03cf
CC		 4180 if (reset_devices) {
4181 /* Reset the controller with a PCI power-cycle */
4182 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4183 return -ENODEV;
4184
5e18cfd0
JA		 4185 /* Now try to get the controller to respond to a no-op. Some
4186 devices (notably the HP Smart Array 5i Controller) need
4187 up to 30 seconds to respond. */
5e4c91c8 4188 for (i=0; i<30; i++) {
82eb03cf
CC		 4189 if (cciss_noop(pdev) == 0)
4190 break;
5e4c91c8
JA		 4191
4192 schedule_timeout_uninterruptible(HZ);
4193 }
4194 if (i == 30) {
4195 printk(KERN_ERR "cciss: controller seems dead\n");
4196 return -EBUSY;
82eb03cf
CC		 4197 }
4198 }
4199
1da177e4 4200 i = alloc_cciss_hba();
7c832835 4201 if (i < 0)
e2019b58 4202 return -1;
1f8ef380
MM		 4203
4204 hba[i]->busy_initializing = 1;
8a3173de
JA		 4205 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4206 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4207 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4208
1da177e4 4209 if (cciss_pci_init(hba[i], pdev) != 0)
2cfa948c 4210 goto clean_no_release_regions;
1da177e4
LT		 4211
4212 sprintf(hba[i]->devname, "cciss%d", i);
4213 hba[i]->ctlr = i;
4214 hba[i]->pdev = pdev;
4215
b368c9dd
AP		 4216 init_completion(&hba[i]->scan_wait);
4217
7fe06326
AP		 4218 if (cciss_create_hba_sysfs_entry(hba[i]))
4219 goto clean0;
4220
1da177e4 4221 /* configure PCI DMA stuff */
6a35528a 4222 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4223 dac = 1;
284901a9 4224 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4225 dac = 0;
1da177e4 4226 else {
40aabb58 4227 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4228 goto clean1;
4229 }
4230
4231 /*
4232 * register with the major number, or get a dynamic major number
4233 * by passing 0 as argument. This is done for greater than
4234 * 8 controller support.
4235 */
4236 if (i < MAX_CTLR_ORIG)
564de74a 4237 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4238 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4239 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4240 printk(KERN_ERR
7c832835
BH		 4241 "cciss: Unable to get major number %d for %s "
4242 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4243 goto clean1;
7c832835 4244 } else {
1da177e4
LT		 4245 if (i >= MAX_CTLR_ORIG)
4246 hba[i]->major = rc;
4247 }
4248
4249 /* make sure the board interrupts are off */
4250 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4251 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4252 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4253 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4254 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4255 goto clean2;
4256 }
40aabb58
BH		 4257
4258 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4259 hba[i]->devname, pdev->device, pci_name(pdev),
4260 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4261
4262 hba[i]->cmd_pool_bits =
061837bc
JL		 4263 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4264 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4265 hba[i]->cmd_pool = (CommandList_struct *)
4266 pci_alloc_consistent(hba[i]->pdev,
f880632f 4267 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4268 &(hba[i]->cmd_pool_dhandle));
4269 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4270 pci_alloc_consistent(hba[i]->pdev,
f880632f 4271 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4272 &(hba[i]->errinfo_pool_dhandle));
4273 if ((hba[i]->cmd_pool_bits == NULL)
4274 || (hba[i]->cmd_pool == NULL)
4275 || (hba[i]->errinfo_pool == NULL)) {
4276 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4277 goto clean4;
4278 }
5c07a311
DB		 4279
4280 /* Need space for temp scatter list */
4281 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4282 sizeof(struct scatterlist *),
4283 GFP_KERNEL);
4284 for (k = 0; k < hba[i]->nr_cmds; k++) {
4285 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4286 hba[i]->maxsgentries,
4287 GFP_KERNEL);
4288 if (hba[i]->scatter_list[k] == NULL) {
4289 printk(KERN_ERR "cciss%d: could not allocate "
4290 "s/g lists\n", i);
4291 goto clean4;
4292 }
4293 }
49fc5601
SC		 4294 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
4295 hba[i]->chainsize, hba[i]->nr_cmds);
4296 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
5c07a311 4297 goto clean4;
5c07a311 4298
1da177e4 4299 spin_lock_init(&hba[i]->lock);
1da177e4 4300
7c832835
BH		 4301 /* Initialize the pdev driver private data.
4302 have it point to hba[i]. */
1da177e4 4303 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4304 /* command and error info recs zeroed out before
4305 they are used */
4306 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4307 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4308 * sizeof(unsigned long));
1da177e4 4309
6ae5ce8e
MM		 4310 hba[i]->num_luns = 0;
4311 hba[i]->highest_lun = -1;
4312 for (j = 0; j < CISS_MAX_LUN; j++) {
9cef0d2f 4313 hba[i]->drv[j] = NULL;
6ae5ce8e
MM		 4314 hba[i]->gendisk[j] = NULL;
4315 }
1da177e4
LT		 4316
4317 cciss_scsi_setup(i);
4318
4319 /* Turn the interrupts on so we can service requests */
4320 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4321
22bece00
MM		 4322 /* Get the firmware version */
4323 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4324 if (inq_buff == NULL) {
4325 printk(KERN_ERR "cciss: out of memory\n");
4326 goto clean4;
4327 }
4328
4329 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4330 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4331 if (return_code == IO_OK) {
4332 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4333 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4334 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4335 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4336 } else { /* send command failed */
4337 printk(KERN_WARNING "cciss: unable to determine firmware"
4338 " version of controller\n");
4339 }
212a5026 4340 kfree(inq_buff);
22bece00 4341
1da177e4 4342 cciss_procinit(i);
92c4231a 4343
5c07a311 4344 hba[i]->cciss_max_sectors = 8192;
92c4231a 4345
2d11d993 4346 rebuild_lun_table(hba[i], 1, 0);
d6dbf42e 4347 hba[i]->busy_initializing = 0;
e2019b58 4348 return 1;
1da177e4 4349
6ae5ce8e 4350clean4:
6044ec88 4351 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4352 /* Free up sg elements */
4353 for (k = 0; k < hba[i]->nr_cmds; k++)
4354 kfree(hba[i]->scatter_list[k]);
4355 kfree(hba[i]->scatter_list);
49fc5601 4356 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
7c832835 4357 if (hba[i]->cmd_pool)
1da177e4 4358 pci_free_consistent(hba[i]->pdev,
f880632f 4359 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4360 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4361 if (hba[i]->errinfo_pool)
1da177e4 4362 pci_free_consistent(hba[i]->pdev,
f880632f 4363 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4364 hba[i]->errinfo_pool,
4365 hba[i]->errinfo_pool_dhandle);
fb86a35b 4366 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4367clean2:
1da177e4 4368 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4369clean1:
7fe06326
AP		 4370 cciss_destroy_hba_sysfs_entry(hba[i]);
4371clean0:
2cfa948c
SC		 4372 pci_release_regions(pdev);
4373clean_no_release_regions:
1f8ef380 4374 hba[i]->busy_initializing = 0;
9cef0d2f 4375
872225ca
MM		 4376 /*
4377 * Deliberately omit pci_disable_device(): it does something nasty to
4378 * Smart Array controllers that pci_enable_device does not undo
4379 */
799202cb 4380 pci_set_drvdata(pdev, NULL);
61808c2b 4381 free_hba(i);
e2019b58 4382 return -1;
1da177e4
LT		 4383}
4384
e9ca75b5 4385static void cciss_shutdown(struct pci_dev *pdev)
1da177e4 4386{
29009a03
SC		 4387 ctlr_info_t *h;
4388 char *flush_buf;
7c832835 4389 int return_code;
1da177e4 4390
29009a03
SC		 4391 h = pci_get_drvdata(pdev);
4392 flush_buf = kzalloc(4, GFP_KERNEL);
4393 if (!flush_buf) {
4394 printk(KERN_WARNING
4395 "cciss:%d cache not flushed, out of memory.\n",
4396 h->ctlr);
e9ca75b5 4397 return;
e9ca75b5 4398 }
29009a03
SC		 4399 /* write all data in the battery backed cache to disk */
4400 memset(flush_buf, 0, 4);
4401 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4402 4, 0, CTLR_LUNID, TYPE_CMD);
4403 kfree(flush_buf);
4404 if (return_code != IO_OK)
4405 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4406 h->ctlr);
4407 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4408 free_irq(h->intr[2], h);
e9ca75b5
GB		 4409}
4410
4411static void __devexit cciss_remove_one(struct pci_dev *pdev)
4412{
4413 ctlr_info_t *tmp_ptr;
4414 int i, j;
4415
7c832835
BH		 4416 if (pci_get_drvdata(pdev) == NULL) {
4417 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4418 return;
4419 }
0a9279cc 4420
1da177e4
LT		 4421 tmp_ptr = pci_get_drvdata(pdev);
4422 i = tmp_ptr->ctlr;
7c832835 4423 if (hba[i] == NULL) {
1da177e4 4424 printk(KERN_ERR "cciss: device appears to "
7c832835 4425 "already be removed \n");
1da177e4
LT		 4426 return;
4427 }
b6550777 4428
b368c9dd 4429 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4430
b368c9dd 4431 remove_from_scan_list(hba[i]);
b6550777
BH		 4432 remove_proc_entry(hba[i]->devname, proc_cciss);
4433 unregister_blkdev(hba[i]->major, hba[i]->devname);
4434
4435 /* remove it from the disk list */
4436 for (j = 0; j < CISS_MAX_LUN; j++) {
4437 struct gendisk *disk = hba[i]->gendisk[j];
4438 if (disk) {
165125e1 4439 struct request_queue *q = disk->queue;
b6550777 4440
097d0264 4441 if (disk->flags & GENHD_FL_UP) {
8ce51966 4442 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4443 del_gendisk(disk);
097d0264 4444 }
b6550777
BH		 4445 if (q)
4446 blk_cleanup_queue(q);
4447 }
4448 }
4449
ba198efb 4450#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4451 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4452#endif
b6550777 4453
e9ca75b5 4454 cciss_shutdown(pdev);
fb86a35b
MM		 4455
4456#ifdef CONFIG_PCI_MSI
7c832835
BH		 4457 if (hba[i]->msix_vector)
4458 pci_disable_msix(hba[i]->pdev);
4459 else if (hba[i]->msi_vector)
4460 pci_disable_msi(hba[i]->pdev);
4461#endif /* CONFIG_PCI_MSI */
fb86a35b 4462
1da177e4 4463 iounmap(hba[i]->vaddr);
1da177e4 4464
f880632f 4465 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4466 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4467 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4468 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4469 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4470 /* Free up sg elements */
4471 for (j = 0; j < hba[i]->nr_cmds; j++)
4472 kfree(hba[i]->scatter_list[j]);
4473 kfree(hba[i]->scatter_list);
49fc5601 4474 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
872225ca
MM		 4475 /*
4476 * Deliberately omit pci_disable_device(): it does something nasty to
4477 * Smart Array controllers that pci_enable_device does not undo
4478 */
7c832835 4479 pci_release_regions(pdev);
4e570309 4480 pci_set_drvdata(pdev, NULL);
7fe06326 4481 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4482 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4483 free_hba(i);
7c832835 4484}
1da177e4
LT		 4485
4486static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4487 .name = "cciss",
4488 .probe = cciss_init_one,
4489 .remove = __devexit_p(cciss_remove_one),
4490 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4491 .shutdown = cciss_shutdown,
1da177e4
LT		 4492};
4493
4494/*
4495 * This is it. Register the PCI driver information for the cards we control
7c832835 4496 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4497 */
4498static int __init cciss_init(void)
4499{
7fe06326
AP		 4500 int err;
4501
10cbda97
JA		 4502 /*
4503 * The hardware requires that commands are aligned on a 64-bit
4504 * boundary. Given that we use pci_alloc_consistent() to allocate an
4505 * array of them, the size must be a multiple of 8 bytes.
4506 */
1b7d0d28 4507 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
10cbda97 4508
1da177e4
LT		 4509 printk(KERN_INFO DRIVER_NAME "\n");
4510
7fe06326
AP		 4511 err = bus_register(&cciss_bus_type);
4512 if (err)
4513 return err;
4514
b368c9dd
AP		 4515 /* Start the scan thread */
4516 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4517 if (IS_ERR(cciss_scan_thread)) {
4518 err = PTR_ERR(cciss_scan_thread);
4519 goto err_bus_unregister;
4520 }
4521
1da177e4 4522 /* Register for our PCI devices */
7fe06326
AP		 4523 err = pci_register_driver(&cciss_pci_driver);
4524 if (err)
b368c9dd 4525 goto err_thread_stop;
7fe06326 4526
617e1344 4527 return err;
7fe06326 4528
b368c9dd
AP		 4529err_thread_stop:
4530 kthread_stop(cciss_scan_thread);
4531err_bus_unregister:
7fe06326 4532 bus_unregister(&cciss_bus_type);
b368c9dd 4533
7fe06326 4534 return err;
1da177e4
LT		 4535}
4536
4537static void __exit cciss_cleanup(void)
4538{
4539 int i;
4540
4541 pci_unregister_driver(&cciss_pci_driver);
4542 /* double check that all controller entrys have been removed */
7c832835
BH		 4543 for (i = 0; i < MAX_CTLR; i++) {
4544 if (hba[i] != NULL) {
1da177e4 4545 printk(KERN_WARNING "cciss: had to remove"
7c832835 4546 " controller %d\n", i);
1da177e4
LT		 4547 cciss_remove_one(hba[i]->pdev);
4548 }
4549 }
b368c9dd 4550 kthread_stop(cciss_scan_thread);
928b4d8c 4551 remove_proc_entry("driver/cciss", NULL);
7fe06326 4552 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4553}
4554
33079b21
MM		 4555static void fail_all_cmds(unsigned long ctlr)
4556{
4557 /* If we get here, the board is apparently dead. */
4558 ctlr_info_t *h = hba[ctlr];
4559 CommandList_struct *c;
4560 unsigned long flags;
4561
4562 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4563 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4564
4565 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4566
7c832835 4567 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4568
4569 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4570 while (!hlist_empty(&h->reqQ)) {
4571 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4572 removeQ(c);
33079b21 4573 h->Qdepth--;
8a3173de 4574 addQ(&h->cmpQ, c);
33079b21
MM		 4575 }
4576
4577 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4578 while (!hlist_empty(&h->cmpQ)) {
4579 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4580 removeQ(c);
b59e64d0
HR		 4581 if (c->cmd_type != CMD_MSG_STALE)
4582 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4583 if (c->cmd_type == CMD_RWREQ) {
4584 complete_command(h, c, 0);
4585 } else if (c->cmd_type == CMD_IOCTL_PEND)
4586 complete(c->waiting);
4587#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4588 else if (c->cmd_type == CMD_SCSI)
4589 complete_scsi_command(c, 0, 0);
33079b21
MM		 4590#endif
4591 }
4592 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4593 return;
4594}
4595
1da177e4
LT		 4596module_init(cciss_init);
4597module_exit(cciss_cleanup);
Linux kernel - Deliverables
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