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cciss: Add usage_count attribute to each logical drive in /sys
[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
71#include "cciss_cmd.h"
72#include "cciss.h"
73#include <linux/cciss_ioctl.h>
74
75/* define the PCI info for the cards we can control */
76static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 104 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
105 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 106 {0,}
107};
7c832835 108
1da177e4
LT		 109MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
110
1da177e4
LT		 111/* board_id = Subsystem Device ID & Vendor ID
112 * product = Marketing Name for the board
7c832835 113 * access = Address of the struct of function pointers
1da177e4
LT		 114 */
115static struct board_type products[] = {
49153998
MM		 116 {0x40700E11, "Smart Array 5300", &SA5_access},
117 {0x40800E11, "Smart Array 5i", &SA5B_access},
118 {0x40820E11, "Smart Array 532", &SA5B_access},
119 {0x40830E11, "Smart Array 5312", &SA5B_access},
120 {0x409A0E11, "Smart Array 641", &SA5_access},
121 {0x409B0E11, "Smart Array 642", &SA5_access},
122 {0x409C0E11, "Smart Array 6400", &SA5_access},
123 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
124 {0x40910E11, "Smart Array 6i", &SA5_access},
125 {0x3225103C, "Smart Array P600", &SA5_access},
126 {0x3223103C, "Smart Array P800", &SA5_access},
127 {0x3234103C, "Smart Array P400", &SA5_access},
128 {0x3235103C, "Smart Array P400i", &SA5_access},
129 {0x3211103C, "Smart Array E200i", &SA5_access},
130 {0x3212103C, "Smart Array E200", &SA5_access},
131 {0x3213103C, "Smart Array E200i", &SA5_access},
132 {0x3214103C, "Smart Array E200i", &SA5_access},
133 {0x3215103C, "Smart Array E200i", &SA5_access},
134 {0x3237103C, "Smart Array E500", &SA5_access},
135 {0x323D103C, "Smart Array P700m", &SA5_access},
136 {0x3241103C, "Smart Array P212", &SA5_access},
137 {0x3243103C, "Smart Array P410", &SA5_access},
138 {0x3245103C, "Smart Array P410i", &SA5_access},
139 {0x3247103C, "Smart Array P411", &SA5_access},
140 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 141 {0x324A103C, "Smart Array P712m", &SA5_access},
142 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 143 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 144};
145
d14c4ab5 146/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 147#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 148#define MAX_IOCTL_CONFIG_WAIT 1000
149
150/*define how many times we will try a command because of bus resets */
151#define MAX_CMD_RETRIES 3
152
1da177e4
LT		 153#define MAX_CTLR 32
154
155/* Originally cciss driver only supports 8 major numbers */
156#define MAX_CTLR_ORIG 8
157
1da177e4
LT		 158static ctlr_info_t *hba[MAX_CTLR];
159
b368c9dd
AP		 160static struct task_struct *cciss_scan_thread;
161static DEFINE_MUTEX(scan_mutex);
162static LIST_HEAD(scan_q);
163
165125e1 164static void do_cciss_request(struct request_queue *q);
7d12e780 165static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 166static int cciss_open(struct block_device *bdev, fmode_t mode);
167static int cciss_release(struct gendisk *disk, fmode_t mode);
168static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 169 unsigned int cmd, unsigned long arg);
a885c8c4 170static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 171
1da177e4 172static int cciss_revalidate(struct gendisk *disk);
2d11d993 173static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 174static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 175 int clear_all, int via_ioctl);
1da177e4 176
00988a35
MMOD		 177static void cciss_read_capacity(int ctlr, int logvol, int withirq,
178 sector_t *total_size, unsigned int *block_size);
179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
180 sector_t *total_size, unsigned int *block_size);
181static void cciss_geometry_inquiry(int ctlr, int logvol,
182 int withirq, sector_t total_size,
183 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 184 drive_info_struct *drv);
7c832835
BH		 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
186 __u32);
187static void start_io(ctlr_info_t *h);
188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 191 __u8 page_code, unsigned char scsi3addr[],
192 int cmd_type);
85cc61ae 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
194 int attempt_retry);
195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 196
33079b21 197static void fail_all_cmds(unsigned long ctlr);
d6f4965d 198static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 199static int scan_thread(void *data);
200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 201static void cciss_hba_release(struct device *dev);
202static void cciss_device_release(struct device *dev);
361e9b07 203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
33079b21 204
1da177e4 205#ifdef CONFIG_PROC_FS
1da177e4
LT		 206static void cciss_procinit(int i);
207#else
7c832835
BH		 208static void cciss_procinit(int i)
209{
210}
211#endif /* CONFIG_PROC_FS */
1da177e4
LT		 212
213#ifdef CONFIG_COMPAT
ef7822c2
AV		 214static int cciss_compat_ioctl(struct block_device *, fmode_t,
215 unsigned, unsigned long);
1da177e4
LT		 216#endif
217
83d5cde4 218static const struct block_device_operations cciss_fops = {
7c832835 219 .owner = THIS_MODULE,
ef7822c2
AV		 220 .open = cciss_open,
221 .release = cciss_release,
222 .locked_ioctl = cciss_ioctl,
7c832835 223 .getgeo = cciss_getgeo,
1da177e4 224#ifdef CONFIG_COMPAT
ef7822c2 225 .compat_ioctl = cciss_compat_ioctl,
1da177e4 226#endif
7c832835 227 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 228};
229
230/*
231 * Enqueuing and dequeuing functions for cmdlists.
232 */
8a3173de 233static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 234{
8a3173de 235 hlist_add_head(&c->list, list);
1da177e4
LT		 236}
237
8a3173de 238static inline void removeQ(CommandList_struct *c)
1da177e4 239{
b59e64d0
HR		 240 /*
241 * After kexec/dump some commands might still
242 * be in flight, which the firmware will try
243 * to complete. Resetting the firmware doesn't work
244 * with old fw revisions, so we have to mark
245 * them off as 'stale' to prevent the driver from
246 * falling over.
247 */
248 if (WARN_ON(hlist_unhashed(&c->list))) {
249 c->cmd_type = CMD_MSG_STALE;
8a3173de 250 return;
b59e64d0 251 }
8a3173de
JA		 252
253 hlist_del_init(&c->list);
1da177e4
LT		 254}
255
256#include "cciss_scsi.c" /* For SCSI tape support */
257
258#ifdef CONFIG_PROC_FS
259
260/*
261 * Report information about this controller.
262 */
263#define ENG_GIG 1000000000
264#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 265#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 266static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
267 "UNKNOWN"
268};
fa52bec9 269#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
1da177e4
LT		 270
271static struct proc_dir_entry *proc_cciss;
272
89b6e743 273static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 274{
89b6e743
MM		 275 ctlr_info_t *h = seq->private;
276
277 seq_printf(seq, "%s: HP %s Controller\n"
278 "Board ID: 0x%08lx\n"
279 "Firmware Version: %c%c%c%c\n"
280 "IRQ: %d\n"
281 "Logical drives: %d\n"
282 "Current Q depth: %d\n"
283 "Current # commands on controller: %d\n"
284 "Max Q depth since init: %d\n"
285 "Max # commands on controller since init: %d\n"
286 "Max SG entries since init: %d\n",
287 h->devname,
288 h->product_name,
289 (unsigned long)h->board_id,
290 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
291 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
292 h->num_luns,
293 h->Qdepth, h->commands_outstanding,
294 h->maxQsinceinit, h->max_outstanding, h->maxSG);
295
296#ifdef CONFIG_CISS_SCSI_TAPE
297 cciss_seq_tape_report(seq, h->ctlr);
298#endif /* CONFIG_CISS_SCSI_TAPE */
299}
1da177e4 300
89b6e743
MM		 301static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
302{
303 ctlr_info_t *h = seq->private;
304 unsigned ctlr = h->ctlr;
305 unsigned long flags;
1da177e4
LT		 306
307 /* prevent displaying bogus info during configuration
308 * or deconfiguration of a logical volume
309 */
310 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
311 if (h->busy_configuring) {
312 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 313 return ERR_PTR(-EBUSY);
1da177e4
LT		 314 }
315 h->busy_configuring = 1;
316 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
317
89b6e743
MM		 318 if (*pos == 0)
319 cciss_seq_show_header(seq);
320
321 return pos;
322}
323
324static int cciss_seq_show(struct seq_file *seq, void *v)
325{
326 sector_t vol_sz, vol_sz_frac;
327 ctlr_info_t *h = seq->private;
328 unsigned ctlr = h->ctlr;
329 loff_t *pos = v;
330 drive_info_struct *drv = &h->drv[*pos];
331
332 if (*pos > h->highest_lun)
333 return 0;
334
335 if (drv->heads == 0)
336 return 0;
337
338 vol_sz = drv->nr_blocks;
339 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
340 vol_sz_frac *= 100;
341 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
342
fa52bec9 343 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 344 drv->raid_level = RAID_UNKNOWN;
345 seq_printf(seq, "cciss/c%dd%d:"
346 "\t%4u.%02uGB\tRAID %s\n",
347 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
348 raid_label[drv->raid_level]);
349 return 0;
350}
351
352static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
353{
354 ctlr_info_t *h = seq->private;
355
356 if (*pos > h->highest_lun)
357 return NULL;
358 *pos += 1;
359
360 return pos;
361}
362
363static void cciss_seq_stop(struct seq_file *seq, void *v)
364{
365 ctlr_info_t *h = seq->private;
366
367 /* Only reset h->busy_configuring if we succeeded in setting
368 * it during cciss_seq_start. */
369 if (v == ERR_PTR(-EBUSY))
370 return;
7c832835 371
1da177e4 372 h->busy_configuring = 0;
1da177e4
LT		 373}
374
88e9d34c 375static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 376 .start = cciss_seq_start,
377 .show = cciss_seq_show,
378 .next = cciss_seq_next,
379 .stop = cciss_seq_stop,
380};
381
382static int cciss_seq_open(struct inode *inode, struct file *file)
383{
384 int ret = seq_open(file, &cciss_seq_ops);
385 struct seq_file *seq = file->private_data;
386
387 if (!ret)
388 seq->private = PDE(inode)->data;
389
390 return ret;
391}
392
393static ssize_t
394cciss_proc_write(struct file *file, const char __user *buf,
395 size_t length, loff_t *ppos)
1da177e4 396{
89b6e743
MM		 397 int err;
398 char *buffer;
399
400#ifndef CONFIG_CISS_SCSI_TAPE
401 return -EINVAL;
1da177e4
LT		 402#endif
403
89b6e743 404 if (!buf || length > PAGE_SIZE - 1)
7c832835 405 return -EINVAL;
89b6e743
MM		 406
407 buffer = (char *)__get_free_page(GFP_KERNEL);
408 if (!buffer)
409 return -ENOMEM;
410
411 err = -EFAULT;
412 if (copy_from_user(buffer, buf, length))
413 goto out;
414 buffer[length] = '\0';
415
416#ifdef CONFIG_CISS_SCSI_TAPE
417 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
418 struct seq_file *seq = file->private_data;
419 ctlr_info_t *h = seq->private;
420 int rc;
421
7c832835
BH		 422 rc = cciss_engage_scsi(h->ctlr);
423 if (rc != 0)
89b6e743
MM		 424 err = -rc;
425 else
426 err = length;
427 } else
428#endif /* CONFIG_CISS_SCSI_TAPE */
429 err = -EINVAL;
7c832835
BH		 430 /* might be nice to have "disengage" too, but it's not
431 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 432
433out:
434 free_page((unsigned long)buffer);
435 return err;
1da177e4
LT		 436}
437
89b6e743
MM		 438static struct file_operations cciss_proc_fops = {
439 .owner = THIS_MODULE,
440 .open = cciss_seq_open,
441 .read = seq_read,
442 .llseek = seq_lseek,
443 .release = seq_release,
444 .write = cciss_proc_write,
445};
446
1da177e4
LT		 447static void __devinit cciss_procinit(int i)
448{
449 struct proc_dir_entry *pde;
450
89b6e743 451 if (proc_cciss == NULL)
928b4d8c 452 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 453 if (!proc_cciss)
454 return;
3dfcf9c4 455 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 456 S_IROTH, proc_cciss,
3dfcf9c4 457 &cciss_proc_fops, hba[i]);
1da177e4 458}
7c832835 459#endif /* CONFIG_PROC_FS */
1da177e4 460
7fe06326
AP		 461#define MAX_PRODUCT_NAME_LEN 19
462
463#define to_hba(n) container_of(n, struct ctlr_info, dev)
7fe06326 464
d6f4965d
AP		 465static ssize_t host_store_rescan(struct device *dev,
466 struct device_attribute *attr,
467 const char *buf, size_t count)
468{
469 struct ctlr_info *h = to_hba(dev);
470
471 add_to_scan_list(h);
472 wake_up_process(cciss_scan_thread);
473 wait_for_completion_interruptible(&h->scan_wait);
474
475 return count;
476}
477DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 478
479static ssize_t dev_show_unique_id(struct device *dev,
480 struct device_attribute *attr,
481 char *buf)
482{
617e1344
SC		 483 drive_info_struct *drv = dev_get_drvdata(dev);
484 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 485 __u8 sn[16];
486 unsigned long flags;
487 int ret = 0;
488
489 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
490 if (h->busy_configuring)
491 ret = -EBUSY;
492 else
493 memcpy(sn, drv->serial_no, sizeof(sn));
494 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
495
496 if (ret)
497 return ret;
498 else
499 return snprintf(buf, 16 * 2 + 2,
500 "%02X%02X%02X%02X%02X%02X%02X%02X"
501 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
502 sn[0], sn[1], sn[2], sn[3],
503 sn[4], sn[5], sn[6], sn[7],
504 sn[8], sn[9], sn[10], sn[11],
505 sn[12], sn[13], sn[14], sn[15]);
506}
507DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
508
509static ssize_t dev_show_vendor(struct device *dev,
510 struct device_attribute *attr,
511 char *buf)
512{
617e1344
SC		 513 drive_info_struct *drv = dev_get_drvdata(dev);
514 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 515 char vendor[VENDOR_LEN + 1];
516 unsigned long flags;
517 int ret = 0;
518
519 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
520 if (h->busy_configuring)
521 ret = -EBUSY;
522 else
523 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
524 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
525
526 if (ret)
527 return ret;
528 else
529 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
530}
531DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
532
533static ssize_t dev_show_model(struct device *dev,
534 struct device_attribute *attr,
535 char *buf)
536{
617e1344
SC		 537 drive_info_struct *drv = dev_get_drvdata(dev);
538 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 539 char model[MODEL_LEN + 1];
540 unsigned long flags;
541 int ret = 0;
542
543 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
544 if (h->busy_configuring)
545 ret = -EBUSY;
546 else
547 memcpy(model, drv->model, MODEL_LEN + 1);
548 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
549
550 if (ret)
551 return ret;
552 else
553 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
554}
555DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
556
557static ssize_t dev_show_rev(struct device *dev,
558 struct device_attribute *attr,
559 char *buf)
560{
617e1344
SC		 561 drive_info_struct *drv = dev_get_drvdata(dev);
562 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 563 char rev[REV_LEN + 1];
564 unsigned long flags;
565 int ret = 0;
566
567 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
568 if (h->busy_configuring)
569 ret = -EBUSY;
570 else
571 memcpy(rev, drv->rev, REV_LEN + 1);
572 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
573
574 if (ret)
575 return ret;
576 else
577 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
578}
579DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
580
ce84a8ae
SC		 581static ssize_t cciss_show_lunid(struct device *dev,
582 struct device_attribute *attr, char *buf)
583{
584 drive_info_struct *drv = dev_get_drvdata(dev);
585 struct ctlr_info *h = to_hba(drv->dev->parent);
586 unsigned long flags;
587 unsigned char lunid[8];
588
589 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
590 if (h->busy_configuring) {
591 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
592 return -EBUSY;
593 }
594 if (!drv->heads) {
595 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
596 return -ENOTTY;
597 }
598 memcpy(lunid, drv->LunID, sizeof(lunid));
599 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
600 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
601 lunid[0], lunid[1], lunid[2], lunid[3],
602 lunid[4], lunid[5], lunid[6], lunid[7]);
603}
604DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
605
3ff1111d
SC		 606static ssize_t cciss_show_raid_level(struct device *dev,
607 struct device_attribute *attr, char *buf)
608{
609 drive_info_struct *drv = dev_get_drvdata(dev);
610 struct ctlr_info *h = to_hba(drv->dev->parent);
611 int raid;
612 unsigned long flags;
613
614 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
615 if (h->busy_configuring) {
616 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
617 return -EBUSY;
618 }
619 raid = drv->raid_level;
620 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
621 if (raid < 0 || raid > RAID_UNKNOWN)
622 raid = RAID_UNKNOWN;
623
624 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
625 raid_label[raid]);
626}
627DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
628
e272afec
SC		 629static ssize_t cciss_show_usage_count(struct device *dev,
630 struct device_attribute *attr, char *buf)
631{
632 drive_info_struct *drv = dev_get_drvdata(dev);
633 struct ctlr_info *h = to_hba(drv->dev->parent);
634 unsigned long flags;
635 int count;
636
637 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
638 if (h->busy_configuring) {
639 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
640 return -EBUSY;
641 }
642 count = drv->usage_count;
643 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
644 return snprintf(buf, 20, "%d\n", count);
645}
646DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
647
d6f4965d
AP		 648static struct attribute *cciss_host_attrs[] = {
649 &dev_attr_rescan.attr,
650 NULL
651};
652
653static struct attribute_group cciss_host_attr_group = {
654 .attrs = cciss_host_attrs,
655};
656
657static struct attribute_group *cciss_host_attr_groups[] = {
658 &cciss_host_attr_group,
659 NULL
660};
661
662static struct device_type cciss_host_type = {
663 .name = "cciss_host",
664 .groups = cciss_host_attr_groups,
617e1344 665 .release = cciss_hba_release,
d6f4965d
AP		 666};
667
7fe06326
AP		 668static struct attribute *cciss_dev_attrs[] = {
669 &dev_attr_unique_id.attr,
670 &dev_attr_model.attr,
671 &dev_attr_vendor.attr,
672 &dev_attr_rev.attr,
ce84a8ae 673 &dev_attr_lunid.attr,
3ff1111d 674 &dev_attr_raid_level.attr,
e272afec 675 &dev_attr_usage_count.attr,
7fe06326
AP		 676 NULL
677};
678
679static struct attribute_group cciss_dev_attr_group = {
680 .attrs = cciss_dev_attrs,
681};
682
a4dbd674 683static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 684 &cciss_dev_attr_group,
685 NULL
686};
687
688static struct device_type cciss_dev_type = {
689 .name = "cciss_device",
690 .groups = cciss_dev_attr_groups,
617e1344 691 .release = cciss_device_release,
7fe06326
AP		 692};
693
694static struct bus_type cciss_bus_type = {
695 .name = "cciss",
696};
697
617e1344
SC		 698/*
699 * cciss_hba_release is called when the reference count
700 * of h->dev goes to zero.
701 */
702static void cciss_hba_release(struct device *dev)
703{
704 /*
705 * nothing to do, but need this to avoid a warning
706 * about not having a release handler from lib/kref.c.
707 */
708}
7fe06326
AP		 709
710/*
711 * Initialize sysfs entry for each controller. This sets up and registers
712 * the 'cciss#' directory for each individual controller under
713 * /sys/bus/pci/devices/<dev>/.
714 */
715static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
716{
717 device_initialize(&h->dev);
718 h->dev.type = &cciss_host_type;
719 h->dev.bus = &cciss_bus_type;
720 dev_set_name(&h->dev, "%s", h->devname);
721 h->dev.parent = &h->pdev->dev;
722
723 return device_add(&h->dev);
724}
725
726/*
727 * Remove sysfs entries for an hba.
728 */
729static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
730{
731 device_del(&h->dev);
617e1344
SC		 732 put_device(&h->dev); /* final put. */
733}
734
735/* cciss_device_release is called when the reference count
736 * of h->drv[x].dev goes to zero.
737 */
738static void cciss_device_release(struct device *dev)
739{
740 kfree(dev);
7fe06326
AP		 741}
742
743/*
744 * Initialize sysfs for each logical drive. This sets up and registers
745 * the 'c#d#' directory for each individual logical drive under
746 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
747 * /sys/block/cciss!c#d# to this entry.
748 */
617e1344 749static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 750 int drv_index)
751{
617e1344
SC		 752 struct device *dev;
753
8ce51966
SC		 754 /* Special case for c*d0, we only create it once. */
755 if (drv_index == 0 && h->drv[drv_index].dev != NULL)
756 return 0;
757
617e1344
SC		 758 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
759 if (!dev)
760 return -ENOMEM;
761 device_initialize(dev);
762 dev->type = &cciss_dev_type;
763 dev->bus = &cciss_bus_type;
764 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
765 dev->parent = &h->dev;
766 h->drv[drv_index].dev = dev;
767 dev_set_drvdata(dev, &h->drv[drv_index]);
768 return device_add(dev);
7fe06326
AP		 769}
770
771/*
772 * Remove sysfs entries for a logical drive.
773 */
8ce51966
SC		 774static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
775 int ctlr_exiting)
7fe06326 776{
617e1344 777 struct device *dev = h->drv[drv_index].dev;
8ce51966
SC		 778
779 /* special case for c*d0, we only destroy it on controller exit */
780 if (drv_index == 0 && !ctlr_exiting)
781 return;
782
617e1344
SC		 783 device_del(dev);
784 put_device(dev); /* the "final" put. */
785 h->drv[drv_index].dev = NULL;
7fe06326
AP		 786}
787
7c832835
BH		 788/*
789 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 790 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 791 * which ones are free or in use. For operations that can wait for kmalloc
792 * to possible sleep, this routine can be called with get_from_pool set to 0.
793 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
794 */
795static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 796{
797 CommandList_struct *c;
7c832835 798 int i;
1da177e4
LT		 799 u64bit temp64;
800 dma_addr_t cmd_dma_handle, err_dma_handle;
801
7c832835
BH		 802 if (!get_from_pool) {
803 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
804 sizeof(CommandList_struct), &cmd_dma_handle);
805 if (c == NULL)
806 return NULL;
1da177e4
LT		 807 memset(c, 0, sizeof(CommandList_struct));
808
33079b21
MM		 809 c->cmdindex = -1;
810
7c832835
BH		 811 c->err_info = (ErrorInfo_struct *)
812 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
813 &err_dma_handle);
814
815 if (c->err_info == NULL) {
816 pci_free_consistent(h->pdev,
1da177e4
LT		 817 sizeof(CommandList_struct), c, cmd_dma_handle);
818 return NULL;
819 }
820 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 821 } else { /* get it out of the controllers pool */
822
823 do {
f880632f
MM		 824 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
825 if (i == h->nr_cmds)
7c832835
BH		 826 return NULL;
827 } while (test_and_set_bit
828 (i & (BITS_PER_LONG - 1),
829 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 830#ifdef CCISS_DEBUG
831 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
832#endif
7c832835 833 c = h->cmd_pool + i;
1da177e4 834 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 835 cmd_dma_handle = h->cmd_pool_dhandle
836 + i * sizeof(CommandList_struct);
1da177e4
LT		 837 c->err_info = h->errinfo_pool + i;
838 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 839 err_dma_handle = h->errinfo_pool_dhandle
840 + i * sizeof(ErrorInfo_struct);
841 h->nr_allocs++;
33079b21
MM		 842
843 c->cmdindex = i;
7c832835 844 }
1da177e4 845
8a3173de 846 INIT_HLIST_NODE(&c->list);
1da177e4 847 c->busaddr = (__u32) cmd_dma_handle;
7c832835 848 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 849 c->ErrDesc.Addr.lower = temp64.val32.lower;
850 c->ErrDesc.Addr.upper = temp64.val32.upper;
851 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 852
7c832835
BH		 853 c->ctlr = h->ctlr;
854 return c;
1da177e4
LT		 855}
856
7c832835
BH		 857/*
858 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 859 */
860static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
861{
862 int i;
863 u64bit temp64;
864
7c832835 865 if (!got_from_pool) {
1da177e4
LT		 866 temp64.val32.lower = c->ErrDesc.Addr.lower;
867 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 868 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
869 c->err_info, (dma_addr_t) temp64.val);
870 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
871 c, (dma_addr_t) c->busaddr);
872 } else {
1da177e4 873 i = c - h->cmd_pool;
7c832835
BH		 874 clear_bit(i & (BITS_PER_LONG - 1),
875 h->cmd_pool_bits + (i / BITS_PER_LONG));
876 h->nr_frees++;
877 }
1da177e4
LT		 878}
879
880static inline ctlr_info_t *get_host(struct gendisk *disk)
881{
7c832835 882 return disk->queue->queuedata;
1da177e4
LT		 883}
884
885static inline drive_info_struct *get_drv(struct gendisk *disk)
886{
887 return disk->private_data;
888}
889
890/*
891 * Open. Make sure the device is really there.
892 */
ef7822c2 893static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 894{
ef7822c2
AV		 895 ctlr_info_t *host = get_host(bdev->bd_disk);
896 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 897
898#ifdef CCISS_DEBUG
ef7822c2 899 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 900#endif /* CCISS_DEBUG */
1da177e4 901
2e043986 902 if (drv->busy_configuring)
ddd47442 903 return -EBUSY;
1da177e4
LT		 904 /*
905 * Root is allowed to open raw volume zero even if it's not configured
906 * so array config can still work. Root is also allowed to open any
907 * volume that has a LUN ID, so it can issue IOCTL to reread the
908 * disk information. I don't think I really like this
909 * but I'm already using way to many device nodes to claim another one
910 * for "raw controller".
911 */
7a06f789 912 if (drv->heads == 0) {
ef7822c2 913 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 914 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 915 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 916 return -ENXIO;
1da177e4 917 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 918 } else if (memcmp(drv->LunID, CTLR_LUNID,
919 sizeof(drv->LunID))) {
1da177e4
LT		 920 return -ENXIO;
921 }
922 }
923 if (!capable(CAP_SYS_ADMIN))
924 return -EPERM;
925 }
926 drv->usage_count++;
927 host->usage_count++;
928 return 0;
929}
7c832835 930
1da177e4
LT		 931/*
932 * Close. Sync first.
933 */
ef7822c2 934static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 935{
ef7822c2
AV		 936 ctlr_info_t *host = get_host(disk);
937 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 938
939#ifdef CCISS_DEBUG
ef7822c2 940 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 941#endif /* CCISS_DEBUG */
1da177e4
LT		 942
943 drv->usage_count--;
944 host->usage_count--;
945 return 0;
946}
947
948#ifdef CONFIG_COMPAT
949
ef7822c2
AV		 950static int do_ioctl(struct block_device *bdev, fmode_t mode,
951 unsigned cmd, unsigned long arg)
1da177e4
LT		 952{
953 int ret;
954 lock_kernel();
ef7822c2 955 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 956 unlock_kernel();
957 return ret;
958}
959
ef7822c2
AV		 960static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
961 unsigned cmd, unsigned long arg);
962static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
963 unsigned cmd, unsigned long arg);
1da177e4 964
ef7822c2
AV		 965static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
966 unsigned cmd, unsigned long arg)
1da177e4
LT		 967{
968 switch (cmd) {
969 case CCISS_GETPCIINFO:
970 case CCISS_GETINTINFO:
971 case CCISS_SETINTINFO:
972 case CCISS_GETNODENAME:
973 case CCISS_SETNODENAME:
974 case CCISS_GETHEARTBEAT:
975 case CCISS_GETBUSTYPES:
976 case CCISS_GETFIRMVER:
977 case CCISS_GETDRIVVER:
978 case CCISS_REVALIDVOLS:
979 case CCISS_DEREGDISK:
980 case CCISS_REGNEWDISK:
981 case CCISS_REGNEWD:
982 case CCISS_RESCANDISK:
983 case CCISS_GETLUNINFO:
ef7822c2 984 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 985
986 case CCISS_PASSTHRU32:
ef7822c2 987 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 988 case CCISS_BIG_PASSTHRU32:
ef7822c2 989 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 990
991 default:
992 return -ENOIOCTLCMD;
993 }
994}
995
ef7822c2
AV		 996static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
997 unsigned cmd, unsigned long arg)
1da177e4
LT		 998{
999 IOCTL32_Command_struct __user *arg32 =
7c832835 1000 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1001 IOCTL_Command_struct arg64;
1002 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1003 int err;
1004 u32 cp;
1005
1006 err = 0;
7c832835
BH		 1007 err |=
1008 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1009 sizeof(arg64.LUN_info));
1010 err |=
1011 copy_from_user(&arg64.Request, &arg32->Request,
1012 sizeof(arg64.Request));
1013 err |=
1014 copy_from_user(&arg64.error_info, &arg32->error_info,
1015 sizeof(arg64.error_info));
1da177e4
LT		 1016 err |= get_user(arg64.buf_size, &arg32->buf_size);
1017 err |= get_user(cp, &arg32->buf);
1018 arg64.buf = compat_ptr(cp);
1019 err |= copy_to_user(p, &arg64, sizeof(arg64));
1020
1021 if (err)
1022 return -EFAULT;
1023
ef7822c2 1024 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1025 if (err)
1026 return err;
7c832835
BH		 1027 err |=
1028 copy_in_user(&arg32->error_info, &p->error_info,
1029 sizeof(arg32->error_info));
1da177e4
LT		 1030 if (err)
1031 return -EFAULT;
1032 return err;
1033}
1034
ef7822c2
AV		 1035static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1036 unsigned cmd, unsigned long arg)
1da177e4
LT		 1037{
1038 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1039 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1040 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1041 BIG_IOCTL_Command_struct __user *p =
1042 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1043 int err;
1044 u32 cp;
1045
1046 err = 0;
7c832835
BH		 1047 err |=
1048 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1049 sizeof(arg64.LUN_info));
1050 err |=
1051 copy_from_user(&arg64.Request, &arg32->Request,
1052 sizeof(arg64.Request));
1053 err |=
1054 copy_from_user(&arg64.error_info, &arg32->error_info,
1055 sizeof(arg64.error_info));
1da177e4
LT		 1056 err |= get_user(arg64.buf_size, &arg32->buf_size);
1057 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1058 err |= get_user(cp, &arg32->buf);
1059 arg64.buf = compat_ptr(cp);
1060 err |= copy_to_user(p, &arg64, sizeof(arg64));
1061
1062 if (err)
7c832835 1063 return -EFAULT;
1da177e4 1064
ef7822c2 1065 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1066 if (err)
1067 return err;
7c832835
BH		 1068 err |=
1069 copy_in_user(&arg32->error_info, &p->error_info,
1070 sizeof(arg32->error_info));
1da177e4
LT		 1071 if (err)
1072 return -EFAULT;
1073 return err;
1074}
1075#endif
a885c8c4
CH		 1076
1077static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1078{
1079 drive_info_struct *drv = get_drv(bdev->bd_disk);
1080
1081 if (!drv->cylinders)
1082 return -ENXIO;
1083
1084 geo->heads = drv->heads;
1085 geo->sectors = drv->sectors;
1086 geo->cylinders = drv->cylinders;
1087 return 0;
1088}
1089
0a9279cc
MM		 1090static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1091{
1092 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1093 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1094 (void)check_for_unit_attention(host, c);
1095}
1da177e4 1096/*
7c832835 1097 * ioctl
1da177e4 1098 */
ef7822c2 1099static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1100 unsigned int cmd, unsigned long arg)
1da177e4 1101{
1da177e4
LT		 1102 struct gendisk *disk = bdev->bd_disk;
1103 ctlr_info_t *host = get_host(disk);
1104 drive_info_struct *drv = get_drv(disk);
1105 int ctlr = host->ctlr;
1106 void __user *argp = (void __user *)arg;
1107
1108#ifdef CCISS_DEBUG
1109 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1110#endif /* CCISS_DEBUG */
1111
1112 switch (cmd) {
1da177e4 1113 case CCISS_GETPCIINFO:
7c832835
BH		 1114 {
1115 cciss_pci_info_struct pciinfo;
1116
1117 if (!arg)
1118 return -EINVAL;
1119 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1120 pciinfo.bus = host->pdev->bus->number;
1121 pciinfo.dev_fn = host->pdev->devfn;
1122 pciinfo.board_id = host->board_id;
1123 if (copy_to_user
1124 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1125 return -EFAULT;
1126 return 0;
1127 }
1da177e4 1128 case CCISS_GETINTINFO:
7c832835
BH		 1129 {
1130 cciss_coalint_struct intinfo;
1131 if (!arg)
1132 return -EINVAL;
1133 intinfo.delay =
1134 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1135 intinfo.count =
1136 readl(&host->cfgtable->HostWrite.CoalIntCount);
1137 if (copy_to_user
1138 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1139 return -EFAULT;
1140 return 0;
1141 }
1da177e4 1142 case CCISS_SETINTINFO:
1da177e4 1143 {
7c832835
BH		 1144 cciss_coalint_struct intinfo;
1145 unsigned long flags;
1146 int i;
1147
1148 if (!arg)
1149 return -EINVAL;
1150 if (!capable(CAP_SYS_ADMIN))
1151 return -EPERM;
1152 if (copy_from_user
1153 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1154 return -EFAULT;
1155 if ((intinfo.delay == 0) && (intinfo.count == 0))
1156 {
1157// printk("cciss_ioctl: delay and count cannot be 0\n");
1158 return -EINVAL;
1159 }
1160 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1161 /* Update the field, and then ring the doorbell */
1162 writel(intinfo.delay,
1163 &(host->cfgtable->HostWrite.CoalIntDelay));
1164 writel(intinfo.count,
1165 &(host->cfgtable->HostWrite.CoalIntCount));
1166 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1167
1168 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1169 if (!(readl(host->vaddr + SA5_DOORBELL)
1170 & CFGTBL_ChangeReq))
1171 break;
1172 /* delay and try again */
1173 udelay(1000);
1174 }
1175 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1176 if (i >= MAX_IOCTL_CONFIG_WAIT)
1177 return -EAGAIN;
1178 return 0;
1da177e4 1179 }
1da177e4 1180 case CCISS_GETNODENAME:
7c832835
BH		 1181 {
1182 NodeName_type NodeName;
1183 int i;
1184
1185 if (!arg)
1186 return -EINVAL;
1187 for (i = 0; i < 16; i++)
1188 NodeName[i] =
1189 readb(&host->cfgtable->ServerName[i]);
1190 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1191 return -EFAULT;
1192 return 0;
1193 }
1da177e4 1194 case CCISS_SETNODENAME:
7c832835
BH		 1195 {
1196 NodeName_type NodeName;
1197 unsigned long flags;
1198 int i;
1199
1200 if (!arg)
1201 return -EINVAL;
1202 if (!capable(CAP_SYS_ADMIN))
1203 return -EPERM;
1204
1205 if (copy_from_user
1206 (NodeName, argp, sizeof(NodeName_type)))
1207 return -EFAULT;
1208
1209 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1210
1211 /* Update the field, and then ring the doorbell */
1212 for (i = 0; i < 16; i++)
1213 writeb(NodeName[i],
1214 &host->cfgtable->ServerName[i]);
1215
1216 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1217
1218 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1219 if (!(readl(host->vaddr + SA5_DOORBELL)
1220 & CFGTBL_ChangeReq))
1221 break;
1222 /* delay and try again */
1223 udelay(1000);
1224 }
1225 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1226 if (i >= MAX_IOCTL_CONFIG_WAIT)
1227 return -EAGAIN;
1228 return 0;
1229 }
1da177e4
LT		 1230
1231 case CCISS_GETHEARTBEAT:
7c832835
BH		 1232 {
1233 Heartbeat_type heartbeat;
1234
1235 if (!arg)
1236 return -EINVAL;
1237 heartbeat = readl(&host->cfgtable->HeartBeat);
1238 if (copy_to_user
1239 (argp, &heartbeat, sizeof(Heartbeat_type)))
1240 return -EFAULT;
1241 return 0;
1242 }
1da177e4 1243 case CCISS_GETBUSTYPES:
7c832835
BH		 1244 {
1245 BusTypes_type BusTypes;
1246
1247 if (!arg)
1248 return -EINVAL;
1249 BusTypes = readl(&host->cfgtable->BusTypes);
1250 if (copy_to_user
1251 (argp, &BusTypes, sizeof(BusTypes_type)))
1252 return -EFAULT;
1253 return 0;
1254 }
1da177e4 1255 case CCISS_GETFIRMVER:
7c832835
BH		 1256 {
1257 FirmwareVer_type firmware;
1da177e4 1258
7c832835
BH		 1259 if (!arg)
1260 return -EINVAL;
1261 memcpy(firmware, host->firm_ver, 4);
1da177e4 1262
7c832835
BH		 1263 if (copy_to_user
1264 (argp, firmware, sizeof(FirmwareVer_type)))
1265 return -EFAULT;
1266 return 0;
1267 }
1268 case CCISS_GETDRIVVER:
1269 {
1270 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1271
7c832835
BH		 1272 if (!arg)
1273 return -EINVAL;
1da177e4 1274
7c832835
BH		 1275 if (copy_to_user
1276 (argp, &DriverVer, sizeof(DriverVer_type)))
1277 return -EFAULT;
1278 return 0;
1279 }
1da177e4 1280
6ae5ce8e
MM		 1281 case CCISS_DEREGDISK:
1282 case CCISS_REGNEWD:
1da177e4 1283 case CCISS_REVALIDVOLS:
2d11d993 1284 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1285
1286 case CCISS_GETLUNINFO:{
1287 LogvolInfo_struct luninfo;
1288
39ccf9a6
SC		 1289 memcpy(&luninfo.LunID, drv->LunID,
1290 sizeof(luninfo.LunID));
7c832835
BH		 1291 luninfo.num_opens = drv->usage_count;
1292 luninfo.num_parts = 0;
1293 if (copy_to_user(argp, &luninfo,
1294 sizeof(LogvolInfo_struct)))
1295 return -EFAULT;
1296 return 0;
1297 }
1da177e4 1298 case CCISS_PASSTHRU:
1da177e4 1299 {
7c832835
BH		 1300 IOCTL_Command_struct iocommand;
1301 CommandList_struct *c;
1302 char *buff = NULL;
1303 u64bit temp64;
1304 unsigned long flags;
6e9a4738 1305 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1306
7c832835
BH		 1307 if (!arg)
1308 return -EINVAL;
1da177e4 1309
7c832835
BH		 1310 if (!capable(CAP_SYS_RAWIO))
1311 return -EPERM;
1da177e4 1312
7c832835
BH		 1313 if (copy_from_user
1314 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1315 return -EFAULT;
1316 if ((iocommand.buf_size < 1) &&
1317 (iocommand.Request.Type.Direction != XFER_NONE)) {
1318 return -EINVAL;
1319 }
1320#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1321 /* Check kmalloc limits */
1322 if (iocommand.buf_size > 128000)
1323 return -EINVAL;
1324#endif
1325 if (iocommand.buf_size > 0) {
1326 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1327 if (buff == NULL)
1328 return -EFAULT;
1329 }
1330 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1331 /* Copy the data into the buffer we created */
1332 if (copy_from_user
1333 (buff, iocommand.buf, iocommand.buf_size)) {
1334 kfree(buff);
1335 return -EFAULT;
1336 }
1337 } else {
1338 memset(buff, 0, iocommand.buf_size);
1339 }
1340 if ((c = cmd_alloc(host, 0)) == NULL) {
1341 kfree(buff);
1342 return -ENOMEM;
1343 }
1344 // Fill in the command type
1345 c->cmd_type = CMD_IOCTL_PEND;
1346 // Fill in Command Header
1347 c->Header.ReplyQueue = 0; // unused in simple mode
1348 if (iocommand.buf_size > 0) // buffer to fill
1349 {
1350 c->Header.SGList = 1;
1351 c->Header.SGTotal = 1;
1352 } else // no buffers to fill
1353 {
1354 c->Header.SGList = 0;
1355 c->Header.SGTotal = 0;
1356 }
1357 c->Header.LUN = iocommand.LUN_info;
1358 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1359
7c832835
BH		 1360 // Fill in Request block
1361 c->Request = iocommand.Request;
1da177e4 1362
7c832835
BH		 1363 // Fill in the scatter gather information
1364 if (iocommand.buf_size > 0) {
1365 temp64.val = pci_map_single(host->pdev, buff,
1366 iocommand.buf_size,
1367 PCI_DMA_BIDIRECTIONAL);
1368 c->SG[0].Addr.lower = temp64.val32.lower;
1369 c->SG[0].Addr.upper = temp64.val32.upper;
1370 c->SG[0].Len = iocommand.buf_size;
1371 c->SG[0].Ext = 0; // we are not chaining
1372 }
1373 c->waiting = &wait;
1374
1375 /* Put the request on the tail of the request queue */
1376 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1377 addQ(&host->reqQ, c);
1378 host->Qdepth++;
1379 start_io(host);
1380 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1381
1382 wait_for_completion(&wait);
1383
1384 /* unlock the buffers from DMA */
1385 temp64.val32.lower = c->SG[0].Addr.lower;
1386 temp64.val32.upper = c->SG[0].Addr.upper;
1387 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1388 iocommand.buf_size,
1389 PCI_DMA_BIDIRECTIONAL);
1390
0a9279cc
MM		 1391 check_ioctl_unit_attention(host, c);
1392
7c832835
BH		 1393 /* Copy the error information out */
1394 iocommand.error_info = *(c->err_info);
1395 if (copy_to_user
1396 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1397 kfree(buff);
1da177e4
LT		 1398 cmd_free(host, c, 0);
1399 return -EFAULT;
1400 }
7c832835
BH		 1401
1402 if (iocommand.Request.Type.Direction == XFER_READ) {
1403 /* Copy the data out of the buffer we created */
1404 if (copy_to_user
1405 (iocommand.buf, buff, iocommand.buf_size)) {
1406 kfree(buff);
1407 cmd_free(host, c, 0);
1408 return -EFAULT;
1409 }
1410 }
1411 kfree(buff);
1412 cmd_free(host, c, 0);
1413 return 0;
1da177e4 1414 }
7c832835
BH		 1415 case CCISS_BIG_PASSTHRU:{
1416 BIG_IOCTL_Command_struct *ioc;
1417 CommandList_struct *c;
1418 unsigned char **buff = NULL;
1419 int *buff_size = NULL;
1420 u64bit temp64;
1421 unsigned long flags;
1422 BYTE sg_used = 0;
1423 int status = 0;
1424 int i;
6e9a4738 1425 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1426 __u32 left;
1427 __u32 sz;
1428 BYTE __user *data_ptr;
1429
1430 if (!arg)
1431 return -EINVAL;
1432 if (!capable(CAP_SYS_RAWIO))
1433 return -EPERM;
1434 ioc = (BIG_IOCTL_Command_struct *)
1435 kmalloc(sizeof(*ioc), GFP_KERNEL);
1436 if (!ioc) {
1437 status = -ENOMEM;
1438 goto cleanup1;
1439 }
1440 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1441 status = -EFAULT;
1442 goto cleanup1;
1443 }
1444 if ((ioc->buf_size < 1) &&
1445 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1446 status = -EINVAL;
1447 goto cleanup1;
7c832835
BH		 1448 }
1449 /* Check kmalloc limits using all SGs */
1450 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1451 status = -EINVAL;
1452 goto cleanup1;
1453 }
1454 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1455 status = -EINVAL;
1456 goto cleanup1;
1457 }
1458 buff =
1459 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1460 if (!buff) {
1da177e4
LT		 1461 status = -ENOMEM;
1462 goto cleanup1;
1463 }
5cbded58 1464 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1465 GFP_KERNEL);
1466 if (!buff_size) {
1467 status = -ENOMEM;
1468 goto cleanup1;
1469 }
1470 left = ioc->buf_size;
1471 data_ptr = ioc->buf;
1472 while (left) {
1473 sz = (left >
1474 ioc->malloc_size) ? ioc->
1475 malloc_size : left;
1476 buff_size[sg_used] = sz;
1477 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1478 if (buff[sg_used] == NULL) {
1da177e4 1479 status = -ENOMEM;
15534d38
JA		 1480 goto cleanup1;
1481 }
7c832835
BH		 1482 if (ioc->Request.Type.Direction == XFER_WRITE) {
1483 if (copy_from_user
1484 (buff[sg_used], data_ptr, sz)) {
f7108f91 1485 status = -EFAULT;
7c832835
BH		 1486 goto cleanup1;
1487 }
1488 } else {
1489 memset(buff[sg_used], 0, sz);
1490 }
1491 left -= sz;
1492 data_ptr += sz;
1493 sg_used++;
1494 }
1495 if ((c = cmd_alloc(host, 0)) == NULL) {
1496 status = -ENOMEM;
1497 goto cleanup1;
1498 }
1499 c->cmd_type = CMD_IOCTL_PEND;
1500 c->Header.ReplyQueue = 0;
1501
1502 if (ioc->buf_size > 0) {
1503 c->Header.SGList = sg_used;
1504 c->Header.SGTotal = sg_used;
1da177e4 1505 } else {
7c832835
BH		 1506 c->Header.SGList = 0;
1507 c->Header.SGTotal = 0;
1da177e4 1508 }
7c832835
BH		 1509 c->Header.LUN = ioc->LUN_info;
1510 c->Header.Tag.lower = c->busaddr;
1511
1512 c->Request = ioc->Request;
1513 if (ioc->buf_size > 0) {
1514 int i;
1515 for (i = 0; i < sg_used; i++) {
1516 temp64.val =
1517 pci_map_single(host->pdev, buff[i],
1518 buff_size[i],
1519 PCI_DMA_BIDIRECTIONAL);
1520 c->SG[i].Addr.lower =
1521 temp64.val32.lower;
1522 c->SG[i].Addr.upper =
1523 temp64.val32.upper;
1524 c->SG[i].Len = buff_size[i];
1525 c->SG[i].Ext = 0; /* we are not chaining */
1526 }
1527 }
1528 c->waiting = &wait;
1529 /* Put the request on the tail of the request queue */
1530 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1531 addQ(&host->reqQ, c);
1532 host->Qdepth++;
1533 start_io(host);
1534 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1535 wait_for_completion(&wait);
1536 /* unlock the buffers from DMA */
1537 for (i = 0; i < sg_used; i++) {
1538 temp64.val32.lower = c->SG[i].Addr.lower;
1539 temp64.val32.upper = c->SG[i].Addr.upper;
1540 pci_unmap_single(host->pdev,
1541 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1542 PCI_DMA_BIDIRECTIONAL);
1da177e4 1543 }
0a9279cc 1544 check_ioctl_unit_attention(host, c);
7c832835
BH		 1545 /* Copy the error information out */
1546 ioc->error_info = *(c->err_info);
1547 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1548 cmd_free(host, c, 0);
1549 status = -EFAULT;
1550 goto cleanup1;
1551 }
1552 if (ioc->Request.Type.Direction == XFER_READ) {
1553 /* Copy the data out of the buffer we created */
1554 BYTE __user *ptr = ioc->buf;
1555 for (i = 0; i < sg_used; i++) {
1556 if (copy_to_user
1557 (ptr, buff[i], buff_size[i])) {
1558 cmd_free(host, c, 0);
1559 status = -EFAULT;
1560 goto cleanup1;
1561 }
1562 ptr += buff_size[i];
1da177e4 1563 }
1da177e4 1564 }
7c832835
BH		 1565 cmd_free(host, c, 0);
1566 status = 0;
1567 cleanup1:
1568 if (buff) {
1569 for (i = 0; i < sg_used; i++)
1570 kfree(buff[i]);
1571 kfree(buff);
1572 }
1573 kfree(buff_size);
1574 kfree(ioc);
1575 return status;
1da177e4 1576 }
03bbfee5
MMOD		 1577
1578 /* scsi_cmd_ioctl handles these, below, though some are not */
1579 /* very meaningful for cciss. SG_IO is the main one people want. */
1580
1581 case SG_GET_VERSION_NUM:
1582 case SG_SET_TIMEOUT:
1583 case SG_GET_TIMEOUT:
1584 case SG_GET_RESERVED_SIZE:
1585 case SG_SET_RESERVED_SIZE:
1586 case SG_EMULATED_HOST:
1587 case SG_IO:
1588 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1589 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1590
1591 /* scsi_cmd_ioctl would normally handle these, below, but */
1592 /* they aren't a good fit for cciss, as CD-ROMs are */
1593 /* not supported, and we don't have any bus/target/lun */
1594 /* which we present to the kernel. */
1595
1596 case CDROM_SEND_PACKET:
1597 case CDROMCLOSETRAY:
1598 case CDROMEJECT:
1599 case SCSI_IOCTL_GET_IDLUN:
1600 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1601 default:
1602 return -ENOTTY;
1603 }
1da177e4
LT		 1604}
1605
7b30f092
JA		 1606static void cciss_check_queues(ctlr_info_t *h)
1607{
1608 int start_queue = h->next_to_run;
1609 int i;
1610
1611 /* check to see if we have maxed out the number of commands that can
1612 * be placed on the queue. If so then exit. We do this check here
1613 * in case the interrupt we serviced was from an ioctl and did not
1614 * free any new commands.
1615 */
f880632f 1616 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1617 return;
1618
1619 /* We have room on the queue for more commands. Now we need to queue
1620 * them up. We will also keep track of the next queue to run so
1621 * that every queue gets a chance to be started first.
1622 */
1623 for (i = 0; i < h->highest_lun + 1; i++) {
1624 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1625 /* make sure the disk has been added and the drive is real
1626 * because this can be called from the middle of init_one.
1627 */
1628 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1629 continue;
1630 blk_start_queue(h->gendisk[curr_queue]->queue);
1631
1632 /* check to see if we have maxed out the number of commands
1633 * that can be placed on the queue.
1634 */
f880632f 1635 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1636 if (curr_queue == start_queue) {
1637 h->next_to_run =
1638 (start_queue + 1) % (h->highest_lun + 1);
1639 break;
1640 } else {
1641 h->next_to_run = curr_queue;
1642 break;
1643 }
7b30f092
JA		 1644 }
1645 }
1646}
1647
ca1e0484
MM		 1648static void cciss_softirq_done(struct request *rq)
1649{
1650 CommandList_struct *cmd = rq->completion_data;
1651 ctlr_info_t *h = hba[cmd->ctlr];
1652 unsigned long flags;
1653 u64bit temp64;
1654 int i, ddir;
1655
1656 if (cmd->Request.Type.Direction == XFER_READ)
1657 ddir = PCI_DMA_FROMDEVICE;
1658 else
1659 ddir = PCI_DMA_TODEVICE;
1660
1661 /* command did not need to be retried */
1662 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1663 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1664 temp64.val32.lower = cmd->SG[i].Addr.lower;
1665 temp64.val32.upper = cmd->SG[i].Addr.upper;
1666 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1667 }
1668
ca1e0484
MM		 1669#ifdef CCISS_DEBUG
1670 printk("Done with %p\n", rq);
7c832835 1671#endif /* CCISS_DEBUG */
ca1e0484 1672
c3a4d78c 1673 /* set the residual count for pc requests */
ac44e5b2 1674 if (blk_pc_request(rq))
c3a4d78c 1675 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1676
c3a4d78c 1677 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1678
ca1e0484 1679 spin_lock_irqsave(&h->lock, flags);
7c832835 1680 cmd_free(h, cmd, 1);
7b30f092 1681 cciss_check_queues(h);
ca1e0484
MM		 1682 spin_unlock_irqrestore(&h->lock, flags);
1683}
1684
39ccf9a6
SC		 1685static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1686 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1687{
39ccf9a6
SC		 1688 memcpy(scsi3addr, h->drv[log_unit].LunID,
1689 sizeof(h->drv[log_unit].LunID));
b57695fe 1690}
1691
7fe06326
AP		 1692/* This function gets the SCSI vendor, model, and revision of a logical drive
1693 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1694 * they cannot be read.
1695 */
1696static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1697 char *vendor, char *model, char *rev)
1698{
1699 int rc;
1700 InquiryData_struct *inq_buf;
b57695fe 1701 unsigned char scsi3addr[8];
7fe06326
AP		 1702
1703 *vendor = '\0';
1704 *model = '\0';
1705 *rev = '\0';
1706
1707 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1708 if (!inq_buf)
1709 return;
1710
b57695fe 1711 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1712 if (withirq)
1713 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1714 sizeof(InquiryData_struct), 0,
1715 scsi3addr, TYPE_CMD);
7fe06326
AP		 1716 else
1717 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1718 sizeof(InquiryData_struct), 0,
1719 scsi3addr, TYPE_CMD);
7fe06326
AP		 1720 if (rc == IO_OK) {
1721 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1722 vendor[VENDOR_LEN] = '\0';
1723 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1724 model[MODEL_LEN] = '\0';
1725 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1726 rev[REV_LEN] = '\0';
1727 }
1728
1729 kfree(inq_buf);
1730 return;
1731}
1732
a72da29b
MM		 1733/* This function gets the serial number of a logical drive via
1734 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1735 * number cannot be had, for whatever reason, 16 bytes of 0xff
1736 * are returned instead.
1737 */
1738static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1739 unsigned char *serial_no, int buflen)
1740{
1741#define PAGE_83_INQ_BYTES 64
1742 int rc;
1743 unsigned char *buf;
b57695fe 1744 unsigned char scsi3addr[8];
a72da29b
MM		 1745
1746 if (buflen > 16)
1747 buflen = 16;
1748 memset(serial_no, 0xff, buflen);
1749 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1750 if (!buf)
1751 return;
1752 memset(serial_no, 0, buflen);
b57695fe 1753 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1754 if (withirq)
1755 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1756 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1757 else
1758 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1759 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1760 if (rc == IO_OK)
1761 memcpy(serial_no, &buf[8], buflen);
1762 kfree(buf);
1763 return;
1764}
1765
617e1344
SC		 1766/*
1767 * cciss_add_disk sets up the block device queue for a logical drive
1768 */
1769static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1770 int drv_index)
1771{
1772 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1773 if (!disk->queue)
1774 goto init_queue_failure;
6ae5ce8e
MM		 1775 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1776 disk->major = h->major;
1777 disk->first_minor = drv_index << NWD_SHIFT;
1778 disk->fops = &cciss_fops;
617e1344
SC		 1779 if (h->drv[drv_index].dev == NULL) {
1780 if (cciss_create_ld_sysfs_entry(h, drv_index))
1781 goto cleanup_queue;
1782 }
6ae5ce8e 1783 disk->private_data = &h->drv[drv_index];
617e1344 1784 disk->driverfs_dev = h->drv[drv_index].dev;
6ae5ce8e
MM		 1785
1786 /* Set up queue information */
1787 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1788
1789 /* This is a hardware imposed limit. */
1790 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1791
1792 /* This is a limit in the driver and could be eliminated. */
1793 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1794
1795 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1796
1797 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1798
1799 disk->queue->queuedata = h;
1800
e1defc4f
MP		 1801 blk_queue_logical_block_size(disk->queue,
1802 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1803
1804 /* Make sure all queue data is written out before */
1805 /* setting h->drv[drv_index].queue, as setting this */
1806 /* allows the interrupt handler to start the queue */
1807 wmb();
1808 h->drv[drv_index].queue = disk->queue;
1809 add_disk(disk);
617e1344
SC		 1810 return 0;
1811
1812cleanup_queue:
1813 blk_cleanup_queue(disk->queue);
1814 disk->queue = NULL;
e8074f79 1815init_queue_failure:
617e1344 1816 return -1;
6ae5ce8e
MM		 1817}
1818
ddd47442 1819/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1820 * If the usage_count is zero and it is a heretofore unknown drive, or,
1821 * the drive's capacity, geometry, or serial number has changed,
1822 * then the drive information will be updated and the disk will be
1823 * re-registered with the kernel. If these conditions don't hold,
1824 * then it will be left alone for the next reboot. The exception to this
1825 * is disk 0 which will always be left registered with the kernel since it
1826 * is also the controller node. Any changes to disk 0 will show up on
1827 * the next reboot.
7c832835 1828 */
2d11d993
SC		 1829static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1830 int via_ioctl)
7c832835 1831{
ddd47442
MM		 1832 ctlr_info_t *h = hba[ctlr];
1833 struct gendisk *disk;
ddd47442
MM		 1834 InquiryData_struct *inq_buff = NULL;
1835 unsigned int block_size;
00988a35 1836 sector_t total_size;
ddd47442
MM		 1837 unsigned long flags = 0;
1838 int ret = 0;
a72da29b
MM		 1839 drive_info_struct *drvinfo;
1840
1841 /* Get information about the disk and modify the driver structure */
1842 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1843 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1844 if (inq_buff == NULL || drvinfo == NULL)
1845 goto mem_msg;
1846
1847 /* testing to see if 16-byte CDBs are already being used */
1848 if (h->cciss_read == CCISS_READ_16) {
1849 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1850 &total_size, &block_size);
1851
1852 } else {
1853 cciss_read_capacity(ctlr, drv_index, 1,
1854 &total_size, &block_size);
1855
1856 /* if read_capacity returns all F's this volume is >2TB */
1857 /* in size so we switch to 16-byte CDB's for all */
1858 /* read/write ops */
1859 if (total_size == 0xFFFFFFFFULL) {
1860 cciss_read_capacity_16(ctlr, drv_index, 1,
1861 &total_size, &block_size);
1862 h->cciss_read = CCISS_READ_16;
1863 h->cciss_write = CCISS_WRITE_16;
1864 } else {
1865 h->cciss_read = CCISS_READ_10;
1866 h->cciss_write = CCISS_WRITE_10;
1867 }
1868 }
1869
1870 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1871 inq_buff, drvinfo);
1872 drvinfo->block_size = block_size;
1873 drvinfo->nr_blocks = total_size + 1;
1874
7fe06326
AP		 1875 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1876 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1877 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1878 sizeof(drvinfo->serial_no));
1879
1880 /* Is it the same disk we already know, and nothing's changed? */
1881 if (h->drv[drv_index].raid_level != -1 &&
1882 ((memcmp(drvinfo->serial_no,
1883 h->drv[drv_index].serial_no, 16) == 0) &&
1884 drvinfo->block_size == h->drv[drv_index].block_size &&
1885 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1886 drvinfo->heads == h->drv[drv_index].heads &&
1887 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1888 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1889 /* The disk is unchanged, nothing to update */
1890 goto freeret;
a72da29b 1891
6ae5ce8e
MM		 1892 /* If we get here it's not the same disk, or something's changed,
1893 * so we need to * deregister it, and re-register it, if it's not
1894 * in use.
1895 * If the disk already exists then deregister it before proceeding
1896 * (unless it's the first disk (for the controller node).
1897 */
a72da29b
MM		 1898 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1899 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1900 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1901 h->drv[drv_index].busy_configuring = 1;
1902 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1903
6ae5ce8e
MM		 1904 /* deregister_disk sets h->drv[drv_index].queue = NULL
1905 * which keeps the interrupt handler from starting
1906 * the queue.
1907 */
2d11d993 1908 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1909 h->drv[drv_index].busy_configuring = 0;
1910 }
1911
1912 /* If the disk is in use return */
1913 if (ret)
a72da29b
MM		 1914 goto freeret;
1915
6ae5ce8e
MM		 1916 /* Save the new information from cciss_geometry_inquiry
1917 * and serial number inquiry.
1918 */
a72da29b
MM		 1919 h->drv[drv_index].block_size = drvinfo->block_size;
1920 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1921 h->drv[drv_index].heads = drvinfo->heads;
1922 h->drv[drv_index].sectors = drvinfo->sectors;
1923 h->drv[drv_index].cylinders = drvinfo->cylinders;
1924 h->drv[drv_index].raid_level = drvinfo->raid_level;
1925 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1926 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1927 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1928 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1929
1930 ++h->num_luns;
1931 disk = h->gendisk[drv_index];
1932 set_capacity(disk, h->drv[drv_index].nr_blocks);
1933
6ae5ce8e
MM		 1934 /* If it's not disk 0 (drv_index != 0)
1935 * or if it was disk 0, but there was previously
1936 * no actual corresponding configured logical drive
1937 * (raid_leve == -1) then we want to update the
1938 * logical drive's information.
1939 */
361e9b07
SC		 1940 if (drv_index || first_time) {
1941 if (cciss_add_disk(h, disk, drv_index) != 0) {
1942 cciss_free_gendisk(h, drv_index);
1943 printk(KERN_WARNING "cciss:%d could not update "
1944 "disk %d\n", h->ctlr, drv_index);
1945 --h->num_luns;
1946 }
1947 }
ddd47442 1948
6ae5ce8e 1949freeret:
ddd47442 1950 kfree(inq_buff);
a72da29b 1951 kfree(drvinfo);
ddd47442 1952 return;
6ae5ce8e 1953mem_msg:
ddd47442
MM		 1954 printk(KERN_ERR "cciss: out of memory\n");
1955 goto freeret;
1956}
1957
1958/* This function will find the first index of the controllers drive array
1959 * that has a -1 for the raid_level and will return that index. This is
1960 * where new drives will be added. If the index to be returned is greater
1961 * than the highest_lun index for the controller then highest_lun is set
1962 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1963 * "controller_node" is used to know if this is a real logical drive, or just
1964 * the controller node, which determines if this counts towards highest_lun.
7c832835 1965 */
eece695f 1966static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1967{
1968 int i;
1969
7c832835
BH		 1970 for (i = 0; i < CISS_MAX_LUN; i++) {
1971 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1972 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1973 if (!controller_node)
1974 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1975 return i;
1976 }
1977 }
1978 return -1;
1979}
1980
361e9b07
SC		 1981static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
1982{
1983 put_disk(h->gendisk[drv_index]);
1984 h->gendisk[drv_index] = NULL;
1985}
1986
6ae5ce8e
MM		 1987/* cciss_add_gendisk finds a free hba[]->drv structure
1988 * and allocates a gendisk if needed, and sets the lunid
1989 * in the drvinfo structure. It returns the index into
1990 * the ->drv[] array, or -1 if none are free.
1991 * is_controller_node indicates whether highest_lun should
1992 * count this disk, or if it's only being added to provide
1993 * a means to talk to the controller in case no logical
1994 * drives have yet been configured.
1995 */
39ccf9a6
SC		 1996static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
1997 int controller_node)
6ae5ce8e
MM		 1998{
1999 int drv_index;
2000
eece695f 2001 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 2002 if (drv_index == -1)
2003 return -1;
8ce51966 2004
6ae5ce8e
MM		 2005 /*Check if the gendisk needs to be allocated */
2006 if (!h->gendisk[drv_index]) {
2007 h->gendisk[drv_index] =
2008 alloc_disk(1 << NWD_SHIFT);
2009 if (!h->gendisk[drv_index]) {
2010 printk(KERN_ERR "cciss%d: could not "
2011 "allocate a new disk %d\n",
2012 h->ctlr, drv_index);
2013 return -1;
2014 }
2015 }
39ccf9a6
SC		 2016 memcpy(h->drv[drv_index].LunID, lunid,
2017 sizeof(h->drv[drv_index].LunID));
097d0264
SC		 2018 if (h->drv[drv_index].dev == NULL) {
2019 if (cciss_create_ld_sysfs_entry(h, drv_index))
2020 goto err_free_disk;
2021 }
6ae5ce8e
MM		 2022 /* Don't need to mark this busy because nobody */
2023 /* else knows about this disk yet to contend */
2024 /* for access to it. */
2025 h->drv[drv_index].busy_configuring = 0;
2026 wmb();
2027 return drv_index;
7fe06326
AP		 2028
2029err_free_disk:
361e9b07 2030 cciss_free_gendisk(h, drv_index);
7fe06326 2031 return -1;
6ae5ce8e
MM		 2032}
2033
2034/* This is for the special case of a controller which
2035 * has no logical drives. In this case, we still need
2036 * to register a disk so the controller can be accessed
2037 * by the Array Config Utility.
2038 */
2039static void cciss_add_controller_node(ctlr_info_t *h)
2040{
2041 struct gendisk *disk;
2042 int drv_index;
2043
2044 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2045 return;
2046
39ccf9a6 2047 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2048 if (drv_index == -1)
2049 goto error;
6ae5ce8e
MM		 2050 h->drv[drv_index].block_size = 512;
2051 h->drv[drv_index].nr_blocks = 0;
2052 h->drv[drv_index].heads = 0;
2053 h->drv[drv_index].sectors = 0;
2054 h->drv[drv_index].cylinders = 0;
2055 h->drv[drv_index].raid_level = -1;
2056 memset(h->drv[drv_index].serial_no, 0, 16);
2057 disk = h->gendisk[drv_index];
361e9b07
SC		 2058 if (cciss_add_disk(h, disk, drv_index) == 0)
2059 return;
2060 cciss_free_gendisk(h, drv_index);
2061error:
2062 printk(KERN_WARNING "cciss%d: could not "
2063 "add disk 0.\n", h->ctlr);
2064 return;
6ae5ce8e
MM		 2065}
2066
ddd47442 2067/* This function will add and remove logical drives from the Logical
d14c4ab5 2068 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2069 * so that mount points are preserved until the next reboot. This allows
2070 * for the removal of logical drives in the middle of the drive array
2071 * without a re-ordering of those drives.
2072 * INPUT
2073 * h = The controller to perform the operations on
7c832835 2074 */
2d11d993
SC		 2075static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2076 int via_ioctl)
1da177e4 2077{
ddd47442
MM		 2078 int ctlr = h->ctlr;
2079 int num_luns;
2080 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2081 int return_code;
2082 int listlength = 0;
2083 int i;
2084 int drv_found;
2085 int drv_index = 0;
39ccf9a6 2086 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2087 unsigned long flags;
ddd47442 2088
6ae5ce8e
MM		 2089 if (!capable(CAP_SYS_RAWIO))
2090 return -EPERM;
2091
ddd47442
MM		 2092 /* Set busy_configuring flag for this operation */
2093 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2094 if (h->busy_configuring) {
ddd47442
MM		 2095 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2096 return -EBUSY;
2097 }
2098 h->busy_configuring = 1;
a72da29b 2099 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2100
a72da29b
MM		 2101 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2102 if (ld_buff == NULL)
2103 goto mem_msg;
2104
2105 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2106 sizeof(ReportLunData_struct),
2107 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2108
a72da29b
MM		 2109 if (return_code == IO_OK)
2110 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2111 else { /* reading number of logical volumes failed */
2112 printk(KERN_WARNING "cciss: report logical volume"
2113 " command failed\n");
2114 listlength = 0;
2115 goto freeret;
2116 }
2117
2118 num_luns = listlength / 8; /* 8 bytes per entry */
2119 if (num_luns > CISS_MAX_LUN) {
2120 num_luns = CISS_MAX_LUN;
2121 printk(KERN_WARNING "cciss: more luns configured"
2122 " on controller than can be handled by"
2123 " this driver.\n");
2124 }
2125
6ae5ce8e
MM		 2126 if (num_luns == 0)
2127 cciss_add_controller_node(h);
2128
2129 /* Compare controller drive array to driver's drive array
2130 * to see if any drives are missing on the controller due
2131 * to action of Array Config Utility (user deletes drive)
2132 * and deregister logical drives which have disappeared.
2133 */
a72da29b
MM		 2134 for (i = 0; i <= h->highest_lun; i++) {
2135 int j;
2136 drv_found = 0;
d8a0be6a
SC		 2137
2138 /* skip holes in the array from already deleted drives */
2139 if (h->drv[i].raid_level == -1)
2140 continue;
2141
a72da29b 2142 for (j = 0; j < num_luns; j++) {
39ccf9a6
SC		 2143 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2144 if (memcmp(h->drv[i].LunID, lunid,
2145 sizeof(lunid)) == 0) {
a72da29b
MM		 2146 drv_found = 1;
2147 break;
2148 }
2149 }
2150 if (!drv_found) {
2151 /* Deregister it from the OS, it's gone. */
2152 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2153 h->drv[i].busy_configuring = 1;
2154 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2155 return_code = deregister_disk(h, i, 1, via_ioctl);
a72da29b 2156 h->drv[i].busy_configuring = 0;
ddd47442 2157 }
a72da29b 2158 }
ddd47442 2159
a72da29b
MM		 2160 /* Compare controller drive array to driver's drive array.
2161 * Check for updates in the drive information and any new drives
2162 * on the controller due to ACU adding logical drives, or changing
2163 * a logical drive's size, etc. Reregister any new/changed drives
2164 */
2165 for (i = 0; i < num_luns; i++) {
2166 int j;
ddd47442 2167
a72da29b 2168 drv_found = 0;
ddd47442 2169
39ccf9a6 2170 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2171 /* Find if the LUN is already in the drive array
2172 * of the driver. If so then update its info
2173 * if not in use. If it does not exist then find
2174 * the first free index and add it.
2175 */
2176 for (j = 0; j <= h->highest_lun; j++) {
2177 if (h->drv[j].raid_level != -1 &&
39ccf9a6
SC		 2178 memcmp(h->drv[j].LunID, lunid,
2179 sizeof(h->drv[j].LunID)) == 0) {
a72da29b
MM		 2180 drv_index = j;
2181 drv_found = 1;
2182 break;
ddd47442 2183 }
a72da29b 2184 }
ddd47442 2185
a72da29b
MM		 2186 /* check if the drive was found already in the array */
2187 if (!drv_found) {
eece695f 2188 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2189 if (drv_index == -1)
2190 goto freeret;
a72da29b 2191 }
2d11d993
SC		 2192 cciss_update_drive_info(ctlr, drv_index, first_time,
2193 via_ioctl);
a72da29b 2194 } /* end for */
ddd47442 2195
6ae5ce8e 2196freeret:
ddd47442
MM		 2197 kfree(ld_buff);
2198 h->busy_configuring = 0;
2199 /* We return -1 here to tell the ACU that we have registered/updated
2200 * all of the drives that we can and to keep it from calling us
2201 * additional times.
7c832835 2202 */
ddd47442 2203 return -1;
6ae5ce8e 2204mem_msg:
ddd47442 2205 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2206 h->busy_configuring = 0;
ddd47442
MM		 2207 goto freeret;
2208}
2209
9ddb27b4
SC		 2210static void cciss_clear_drive_info(drive_info_struct *drive_info)
2211{
2212 /* zero out the disk size info */
2213 drive_info->nr_blocks = 0;
2214 drive_info->block_size = 0;
2215 drive_info->heads = 0;
2216 drive_info->sectors = 0;
2217 drive_info->cylinders = 0;
2218 drive_info->raid_level = -1;
2219 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2220 memset(drive_info->model, 0, sizeof(drive_info->model));
2221 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2222 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2223 /*
2224 * don't clear the LUNID though, we need to remember which
2225 * one this one is.
2226 */
2227}
2228
ddd47442
MM		 2229/* This function will deregister the disk and it's queue from the
2230 * kernel. It must be called with the controller lock held and the
2231 * drv structures busy_configuring flag set. It's parameters are:
2232 *
2233 * disk = This is the disk to be deregistered
2234 * drv = This is the drive_info_struct associated with the disk to be
2235 * deregistered. It contains information about the disk used
2236 * by the driver.
2237 * clear_all = This flag determines whether or not the disk information
2238 * is going to be completely cleared out and the highest_lun
2239 * reset. Sometimes we want to clear out information about
d14c4ab5 2240 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2241 * the highest_lun should be left unchanged and the LunID
2242 * should not be cleared.
2d11d993
SC		 2243 * via_ioctl
2244 * This indicates whether we've reached this path via ioctl.
2245 * This affects the maximum usage count allowed for c0d0 to be messed with.
2246 * If this path is reached via ioctl(), then the max_usage_count will
2247 * be 1, as the process calling ioctl() has got to have the device open.
2248 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2249*/
a0ea8622 2250static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2251 int clear_all, int via_ioctl)
ddd47442 2252{
799202cb 2253 int i;
a0ea8622
SC		 2254 struct gendisk *disk;
2255 drive_info_struct *drv;
1da177e4
LT		 2256
2257 if (!capable(CAP_SYS_RAWIO))
2258 return -EPERM;
2259
a0ea8622
SC		 2260 drv = &h->drv[drv_index];
2261 disk = h->gendisk[drv_index];
2262
1da177e4 2263 /* make sure logical volume is NOT is use */
7c832835 2264 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2265 if (drv->usage_count > via_ioctl)
7c832835
BH		 2266 return -EBUSY;
2267 } else if (drv->usage_count > 0)
2268 return -EBUSY;
1da177e4 2269
ddd47442
MM		 2270 /* invalidate the devices and deregister the disk. If it is disk
2271 * zero do not deregister it but just zero out it's values. This
2272 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2273 */
2274 if (h->gendisk[0] != disk) {
5a9df732 2275 struct request_queue *q = disk->queue;
097d0264 2276 if (disk->flags & GENHD_FL_UP) {
8ce51966 2277 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2278 del_gendisk(disk);
097d0264 2279 }
5a9df732
AB		 2280 if (q) {
2281 blk_cleanup_queue(q);
2282 /* Set drv->queue to NULL so that we do not try
2283 * to call blk_start_queue on this queue in the
2284 * interrupt handler
2285 */
2286 drv->queue = NULL;
2287 }
2288 /* If clear_all is set then we are deleting the logical
2289 * drive, not just refreshing its info. For drives
2290 * other than disk 0 we will call put_disk. We do not
2291 * do this for disk 0 as we need it to be able to
2292 * configure the controller.
a72da29b 2293 */
5a9df732
AB		 2294 if (clear_all){
2295 /* This isn't pretty, but we need to find the
2296 * disk in our array and NULL our the pointer.
2297 * This is so that we will call alloc_disk if
2298 * this index is used again later.
a72da29b 2299 */
5a9df732 2300 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2301 if (h->gendisk[i] == disk) {
5a9df732
AB		 2302 h->gendisk[i] = NULL;
2303 break;
799202cb 2304 }
799202cb 2305 }
5a9df732 2306 put_disk(disk);
ddd47442 2307 }
799202cb
MM		 2308 } else {
2309 set_capacity(disk, 0);
ddd47442
MM		 2310 }
2311
2312 --h->num_luns;
9ddb27b4
SC		 2313 cciss_clear_drive_info(drv);
2314
7c832835
BH		 2315 if (clear_all) {
2316 /* check to see if it was the last disk */
2317 if (drv == h->drv + h->highest_lun) {
2318 /* if so, find the new hightest lun */
2319 int i, newhighest = -1;
a72da29b 2320 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2321 /* if the disk has size > 0, it is available */
ddd47442 2322 if (h->drv[i].heads)
7c832835
BH		 2323 newhighest = i;
2324 }
2325 h->highest_lun = newhighest;
1da177e4 2326 }
39ccf9a6 2327 memset(drv->LunID, 0, sizeof(drv->LunID));
ddd47442 2328 }
e2019b58 2329 return 0;
1da177e4 2330}
ddd47442 2331
b57695fe 2332static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2333 size_t size, __u8 page_code, unsigned char *scsi3addr,
2334 int cmd_type)
1da177e4 2335{
7c832835 2336 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2337 u64bit buff_dma_handle;
2338 int status = IO_OK;
2339
2340 c->cmd_type = CMD_IOCTL_PEND;
2341 c->Header.ReplyQueue = 0;
7c832835 2342 if (buff != NULL) {
1da177e4 2343 c->Header.SGList = 1;
7c832835 2344 c->Header.SGTotal = 1;
1da177e4
LT		 2345 } else {
2346 c->Header.SGList = 0;
7c832835 2347 c->Header.SGTotal = 0;
1da177e4
LT		 2348 }
2349 c->Header.Tag.lower = c->busaddr;
b57695fe 2350 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2351
2352 c->Request.Type.Type = cmd_type;
2353 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2354 switch (cmd) {
2355 case CISS_INQUIRY:
1da177e4 2356 /* are we trying to read a vital product page */
7c832835 2357 if (page_code != 0) {
1da177e4
LT		 2358 c->Request.CDB[1] = 0x01;
2359 c->Request.CDB[2] = page_code;
2360 }
2361 c->Request.CDBLen = 6;
7c832835 2362 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2363 c->Request.Type.Direction = XFER_READ;
2364 c->Request.Timeout = 0;
7c832835
BH		 2365 c->Request.CDB[0] = CISS_INQUIRY;
2366 c->Request.CDB[4] = size & 0xFF;
2367 break;
1da177e4
LT		 2368 case CISS_REPORT_LOG:
2369 case CISS_REPORT_PHYS:
7c832835 2370 /* Talking to controller so It's a physical command
1da177e4 2371 mode = 00 target = 0. Nothing to write.
7c832835 2372 */
1da177e4
LT		 2373 c->Request.CDBLen = 12;
2374 c->Request.Type.Attribute = ATTR_SIMPLE;
2375 c->Request.Type.Direction = XFER_READ;
2376 c->Request.Timeout = 0;
2377 c->Request.CDB[0] = cmd;
7c832835 2378 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2379 c->Request.CDB[7] = (size >> 16) & 0xFF;
2380 c->Request.CDB[8] = (size >> 8) & 0xFF;
2381 c->Request.CDB[9] = size & 0xFF;
2382 break;
2383
2384 case CCISS_READ_CAPACITY:
1da177e4
LT		 2385 c->Request.CDBLen = 10;
2386 c->Request.Type.Attribute = ATTR_SIMPLE;
2387 c->Request.Type.Direction = XFER_READ;
2388 c->Request.Timeout = 0;
2389 c->Request.CDB[0] = cmd;
7c832835 2390 break;
00988a35 2391 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2392 c->Request.CDBLen = 16;
2393 c->Request.Type.Attribute = ATTR_SIMPLE;
2394 c->Request.Type.Direction = XFER_READ;
2395 c->Request.Timeout = 0;
2396 c->Request.CDB[0] = cmd;
2397 c->Request.CDB[1] = 0x10;
2398 c->Request.CDB[10] = (size >> 24) & 0xFF;
2399 c->Request.CDB[11] = (size >> 16) & 0xFF;
2400 c->Request.CDB[12] = (size >> 8) & 0xFF;
2401 c->Request.CDB[13] = size & 0xFF;
2402 c->Request.Timeout = 0;
2403 c->Request.CDB[0] = cmd;
2404 break;
1da177e4
LT		 2405 case CCISS_CACHE_FLUSH:
2406 c->Request.CDBLen = 12;
2407 c->Request.Type.Attribute = ATTR_SIMPLE;
2408 c->Request.Type.Direction = XFER_WRITE;
2409 c->Request.Timeout = 0;
2410 c->Request.CDB[0] = BMIC_WRITE;
2411 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2412 break;
88f627ae 2413 case TEST_UNIT_READY:
88f627ae
SC		 2414 c->Request.CDBLen = 6;
2415 c->Request.Type.Attribute = ATTR_SIMPLE;
2416 c->Request.Type.Direction = XFER_NONE;
2417 c->Request.Timeout = 0;
2418 break;
1da177e4
LT		 2419 default:
2420 printk(KERN_WARNING
7c832835 2421 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2422 return IO_ERROR;
1da177e4
LT		 2423 }
2424 } else if (cmd_type == TYPE_MSG) {
2425 switch (cmd) {
7c832835 2426 case 0: /* ABORT message */
3da8b713 2427 c->Request.CDBLen = 12;
2428 c->Request.Type.Attribute = ATTR_SIMPLE;
2429 c->Request.Type.Direction = XFER_WRITE;
2430 c->Request.Timeout = 0;
7c832835
BH		 2431 c->Request.CDB[0] = cmd; /* abort */
2432 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2433 /* buff contains the tag of the command to abort */
2434 memcpy(&c->Request.CDB[4], buff, 8);
2435 break;
7c832835 2436 case 1: /* RESET message */
88f627ae 2437 c->Request.CDBLen = 16;
3da8b713 2438 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2439 c->Request.Type.Direction = XFER_NONE;
3da8b713 2440 c->Request.Timeout = 0;
2441 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2442 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2443 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2444 break;
1da177e4
LT		 2445 case 3: /* No-Op message */
2446 c->Request.CDBLen = 1;
2447 c->Request.Type.Attribute = ATTR_SIMPLE;
2448 c->Request.Type.Direction = XFER_WRITE;
2449 c->Request.Timeout = 0;
2450 c->Request.CDB[0] = cmd;
2451 break;
2452 default:
2453 printk(KERN_WARNING
7c832835 2454 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2455 return IO_ERROR;
2456 }
2457 } else {
2458 printk(KERN_WARNING
7c832835 2459 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2460 return IO_ERROR;
2461 }
2462 /* Fill in the scatter gather information */
2463 if (size > 0) {
2464 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2465 buff, size,
2466 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2467 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2468 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2469 c->SG[0].Len = size;
7c832835 2470 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2471 }
2472 return status;
2473}
7c832835 2474
3c2ab402 2475static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2476{
2477 switch (c->err_info->ScsiStatus) {
2478 case SAM_STAT_GOOD:
2479 return IO_OK;
2480 case SAM_STAT_CHECK_CONDITION:
2481 switch (0xf & c->err_info->SenseInfo[2]) {
2482 case 0: return IO_OK; /* no sense */
2483 case 1: return IO_OK; /* recovered error */
2484 default:
2485 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2486 "check condition, sense key = 0x%02x\n",
2487 h->ctlr, c->Request.CDB[0],
2488 c->err_info->SenseInfo[2]);
2489 }
2490 break;
2491 default:
2492 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2493 "scsi status = 0x%02x\n", h->ctlr,
2494 c->Request.CDB[0], c->err_info->ScsiStatus);
2495 break;
2496 }
2497 return IO_ERROR;
2498}
2499
789a424a 2500static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2501{
5390cfc3 2502 int return_status = IO_OK;
7c832835 2503
789a424a 2504 if (c->err_info->CommandStatus == CMD_SUCCESS)
2505 return IO_OK;
5390cfc3 2506
2507 switch (c->err_info->CommandStatus) {
2508 case CMD_TARGET_STATUS:
3c2ab402 2509 return_status = check_target_status(h, c);
5390cfc3 2510 break;
2511 case CMD_DATA_UNDERRUN:
2512 case CMD_DATA_OVERRUN:
2513 /* expected for inquiry and report lun commands */
2514 break;
2515 case CMD_INVALID:
789a424a 2516 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2517 "reported invalid\n", c->Request.CDB[0]);
2518 return_status = IO_ERROR;
2519 break;
2520 case CMD_PROTOCOL_ERR:
2521 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2522 "protocol error \n", c->Request.CDB[0]);
2523 return_status = IO_ERROR;
2524 break;
2525 case CMD_HARDWARE_ERR:
2526 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2527 " hardware error\n", c->Request.CDB[0]);
2528 return_status = IO_ERROR;
2529 break;
2530 case CMD_CONNECTION_LOST:
2531 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2532 "connection lost\n", c->Request.CDB[0]);
2533 return_status = IO_ERROR;
2534 break;
2535 case CMD_ABORTED:
2536 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2537 "aborted\n", c->Request.CDB[0]);
2538 return_status = IO_ERROR;
2539 break;
2540 case CMD_ABORT_FAILED:
2541 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2542 "abort failed\n", c->Request.CDB[0]);
2543 return_status = IO_ERROR;
2544 break;
2545 case CMD_UNSOLICITED_ABORT:
2546 printk(KERN_WARNING
2547 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2548 c->Request.CDB[0]);
789a424a 2549 return_status = IO_NEEDS_RETRY;
5390cfc3 2550 break;
2551 default:
2552 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2553 "unknown status %x\n", c->Request.CDB[0],
2554 c->err_info->CommandStatus);
2555 return_status = IO_ERROR;
7c832835 2556 }
789a424a 2557 return return_status;
2558}
2559
2560static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2561 int attempt_retry)
2562{
2563 DECLARE_COMPLETION_ONSTACK(wait);
2564 u64bit buff_dma_handle;
2565 unsigned long flags;
2566 int return_status = IO_OK;
2567
2568resend_cmd2:
2569 c->waiting = &wait;
2570 /* Put the request on the tail of the queue and send it */
2571 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2572 addQ(&h->reqQ, c);
2573 h->Qdepth++;
2574 start_io(h);
2575 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2576
2577 wait_for_completion(&wait);
2578
2579 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2580 goto command_done;
2581
2582 return_status = process_sendcmd_error(h, c);
2583
2584 if (return_status == IO_NEEDS_RETRY &&
2585 c->retry_count < MAX_CMD_RETRIES) {
2586 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2587 c->Request.CDB[0]);
2588 c->retry_count++;
2589 /* erase the old error information */
2590 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2591 return_status = IO_OK;
2592 INIT_COMPLETION(wait);
2593 goto resend_cmd2;
2594 }
5390cfc3 2595
2596command_done:
1da177e4 2597 /* unlock the buffers from DMA */
bb2a37bf
MM		 2598 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2599 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2600 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2601 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2602 return return_status;
2603}
2604
b57695fe 2605static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2606 __u8 page_code, unsigned char scsi3addr[],
2607 int cmd_type)
5390cfc3 2608{
2609 ctlr_info_t *h = hba[ctlr];
2610 CommandList_struct *c;
2611 int return_status;
2612
2613 c = cmd_alloc(h, 0);
2614 if (!c)
2615 return -ENOMEM;
b57695fe 2616 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2617 scsi3addr, cmd_type);
5390cfc3 2618 if (return_status == IO_OK)
789a424a 2619 return_status = sendcmd_withirq_core(h, c, 1);
2620
1da177e4 2621 cmd_free(h, c, 0);
7c832835 2622 return return_status;
1da177e4 2623}
7c832835 2624
1da177e4 2625static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2626 int withirq, sector_t total_size,
7c832835
BH		 2627 unsigned int block_size,
2628 InquiryData_struct *inq_buff,
2629 drive_info_struct *drv)
1da177e4
LT		 2630{
2631 int return_code;
00988a35 2632 unsigned long t;
b57695fe 2633 unsigned char scsi3addr[8];
00988a35 2634
1da177e4 2635 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2636 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2637 if (withirq)
2638 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2639 inq_buff, sizeof(*inq_buff),
2640 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2641 else
2642 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2643 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2644 TYPE_CMD);
1da177e4 2645 if (return_code == IO_OK) {
7c832835 2646 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2647 printk(KERN_WARNING
7c832835
BH		 2648 "cciss: reading geometry failed, volume "
2649 "does not support reading geometry\n");
1da177e4 2650 drv->heads = 255;
7c832835 2651 drv->sectors = 32; // Sectors per track
7f42d3b8 2652 drv->cylinders = total_size + 1;
89f97ad1 2653 drv->raid_level = RAID_UNKNOWN;
1da177e4 2654 } else {
1da177e4
LT		 2655 drv->heads = inq_buff->data_byte[6];
2656 drv->sectors = inq_buff->data_byte[7];
2657 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2658 drv->cylinders += inq_buff->data_byte[5];
2659 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2660 }
2661 drv->block_size = block_size;
97c06978 2662 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2663 t = drv->heads * drv->sectors;
2664 if (t > 1) {
97c06978
MMOD		 2665 sector_t real_size = total_size + 1;
2666 unsigned long rem = sector_div(real_size, t);
3f7705ea 2667 if (rem)
97c06978
MMOD		 2668 real_size++;
2669 drv->cylinders = real_size;
1da177e4 2670 }
7c832835 2671 } else { /* Get geometry failed */
1da177e4
LT		 2672 printk(KERN_WARNING "cciss: reading geometry failed\n");
2673 }
1da177e4 2674}
7c832835 2675
1da177e4 2676static void
00988a35 2677cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2678 unsigned int *block_size)
1da177e4 2679{
00988a35 2680 ReadCapdata_struct *buf;
1da177e4 2681 int return_code;
b57695fe 2682 unsigned char scsi3addr[8];
1aebe187
MK		 2683
2684 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2685 if (!buf) {
00988a35
MMOD		 2686 printk(KERN_WARNING "cciss: out of memory\n");
2687 return;
2688 }
1aebe187 2689
b57695fe 2690 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2691 if (withirq)
2692 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2693 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2694 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2695 else
2696 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2697 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2698 0, scsi3addr, TYPE_CMD);
1da177e4 2699 if (return_code == IO_OK) {
4c1f2b31
AV		 2700 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2701 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2702 } else { /* read capacity command failed */
1da177e4
LT		 2703 printk(KERN_WARNING "cciss: read capacity failed\n");
2704 *total_size = 0;
2705 *block_size = BLOCK_SIZE;
2706 }
00988a35 2707 kfree(buf);
00988a35
MMOD		 2708}
2709
2710static void
2711cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2712{
2713 ReadCapdata_struct_16 *buf;
2714 int return_code;
b57695fe 2715 unsigned char scsi3addr[8];
1aebe187
MK		 2716
2717 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2718 if (!buf) {
00988a35
MMOD		 2719 printk(KERN_WARNING "cciss: out of memory\n");
2720 return;
2721 }
1aebe187 2722
b57695fe 2723 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2724 if (withirq) {
2725 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2726 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2727 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2728 }
2729 else {
2730 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2731 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2732 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2733 }
2734 if (return_code == IO_OK) {
4c1f2b31
AV		 2735 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2736 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2737 } else { /* read capacity command failed */
2738 printk(KERN_WARNING "cciss: read capacity failed\n");
2739 *total_size = 0;
2740 *block_size = BLOCK_SIZE;
2741 }
7b92aadf 2742 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2743 (unsigned long long)*total_size+1, *block_size);
00988a35 2744 kfree(buf);
1da177e4
LT		 2745}
2746
1da177e4
LT		 2747static int cciss_revalidate(struct gendisk *disk)
2748{
2749 ctlr_info_t *h = get_host(disk);
2750 drive_info_struct *drv = get_drv(disk);
2751 int logvol;
7c832835 2752 int FOUND = 0;
1da177e4 2753 unsigned int block_size;
00988a35 2754 sector_t total_size;
1da177e4
LT		 2755 InquiryData_struct *inq_buff = NULL;
2756
7c832835 2757 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
39ccf9a6
SC		 2758 if (memcmp(h->drv[logvol].LunID, drv->LunID,
2759 sizeof(drv->LunID)) == 0) {
7c832835 2760 FOUND = 1;
1da177e4
LT		 2761 break;
2762 }
2763 }
2764
7c832835
BH		 2765 if (!FOUND)
2766 return 1;
1da177e4 2767
7c832835
BH		 2768 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2769 if (inq_buff == NULL) {
2770 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2771 return 1;
2772 }
00988a35
MMOD		 2773 if (h->cciss_read == CCISS_READ_10) {
2774 cciss_read_capacity(h->ctlr, logvol, 1,
2775 &total_size, &block_size);
2776 } else {
2777 cciss_read_capacity_16(h->ctlr, logvol, 1,
2778 &total_size, &block_size);
2779 }
7c832835
BH		 2780 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2781 inq_buff, drv);
1da177e4 2782
e1defc4f 2783 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2784 set_capacity(disk, drv->nr_blocks);
2785
1da177e4
LT		 2786 kfree(inq_buff);
2787 return 0;
2788}
2789
2790/*
2791 * Wait polling for a command to complete.
2792 * The memory mapped FIFO is polled for the completion.
2793 * Used only at init time, interrupts from the HBA are disabled.
2794 */
2795static unsigned long pollcomplete(int ctlr)
2796{
2797 unsigned long done;
2798 int i;
2799
2800 /* Wait (up to 20 seconds) for a command to complete */
2801
2802 for (i = 20 * HZ; i > 0; i--) {
2803 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2804 if (done == FIFO_EMPTY)
2805 schedule_timeout_uninterruptible(1);
2806 else
e2019b58 2807 return done;
1da177e4
LT		 2808 }
2809 /* Invalid address to tell caller we ran out of time */
2810 return 1;
2811}
3da8b713 2812
4a4b2d76
SC		 2813/* Send command c to controller h and poll for it to complete.
2814 * Turns interrupts off on the board. Used at driver init time
2815 * and during SCSI error recovery.
1da177e4 2816 */
4a4b2d76 2817static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2818{
1da177e4
LT		 2819 int i;
2820 unsigned long complete;
4a4b2d76 2821 int status = IO_ERROR;
1da177e4 2822 u64bit buff_dma_handle;
1da177e4 2823
4a4b2d76
SC		 2824resend_cmd1:
2825
2826 /* Disable interrupt on the board. */
2827 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2828
1da177e4 2829 /* Make sure there is room in the command FIFO */
7c832835 2830 /* Actually it should be completely empty at this time */
3da8b713 2831 /* unless we are in here doing error handling for the scsi */
2832 /* tape side of the driver. */
7c832835 2833 for (i = 200000; i > 0; i--) {
1da177e4 2834 /* if fifo isn't full go */
4a4b2d76 2835 if (!(h->access.fifo_full(h)))
7c832835 2836 break;
7c832835
BH		 2837 udelay(10);
2838 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2839 " waiting!\n", h->ctlr);
7c832835 2840 }
4a4b2d76 2841 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2842 do {
4a4b2d76 2843 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2844
2845#ifdef CCISS_DEBUG
3da8b713 2846 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2847#endif /* CCISS_DEBUG */
1da177e4 2848
3da8b713 2849 if (complete == 1) {
7c832835
BH		 2850 printk(KERN_WARNING
2851 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2852 "No command list address returned!\n", h->ctlr);
3da8b713 2853 status = IO_ERROR;
3da8b713 2854 break;
2855 }
2856
72f9f132 2857 /* Make sure it's the command we're expecting. */
4a4b2d76 2858 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2859 printk(KERN_WARNING "cciss%d: Unexpected command "
2860 "completion.\n", h->ctlr);
4a4b2d76
SC		 2861 continue;
2862 }
2863
2864 /* It is our command. If no error, we're done. */
2865 if (!(complete & CISS_ERROR_BIT)) {
2866 status = IO_OK;
2867 break;
2868 }
2869
2870 /* There is an error... */
2871
2872 /* if data overrun or underun on Report command ignore it */
2873 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2874 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2875 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2876 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2877 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2878 complete = c->busaddr;
2879 status = IO_OK;
2880 break;
1da177e4 2881 }
4a4b2d76
SC		 2882
2883 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2884 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2885 h->ctlr, c);
2886 if (c->retry_count < MAX_CMD_RETRIES) {
2887 printk(KERN_WARNING "cciss%d: retrying %p\n",
2888 h->ctlr, c);
2889 c->retry_count++;
2890 /* erase the old error information */
2891 memset(c->err_info, 0, sizeof(c->err_info));
2892 goto resend_cmd1;
3da8b713 2893 }
4a4b2d76
SC		 2894 printk(KERN_WARNING "cciss%d: retried %p too many "
2895 "times\n", h->ctlr, c);
2896 status = IO_ERROR;
3c2ab402 2897 break;
4a4b2d76
SC		 2898 }
2899
2900 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2901 printk(KERN_WARNING "cciss%d: command could not be "
2902 "aborted.\n", h->ctlr);
2903 status = IO_ERROR;
3c2ab402 2904 break;
4a4b2d76
SC		 2905 }
2906
4a4b2d76 2907 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2908 status = check_target_status(h, c);
2909 break;
4a4b2d76
SC		 2910 }
2911
3c2ab402 2912 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2913 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2914 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2915 status = IO_ERROR;
3c2ab402 2916 break;
4a4b2d76
SC		 2917
2918 } while (1);
7c832835 2919
1da177e4 2920 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2921 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2922 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2923 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2924 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2925 return status;
2926}
2927
2928/*
2929 * Send a command to the controller, and wait for it to complete.
2930 * Used at init time, and during SCSI error recovery.
2931 */
2932static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2933 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2934{
2935 CommandList_struct *c;
2936 int status;
2937
2938 c = cmd_alloc(hba[ctlr], 1);
2939 if (!c) {
2940 printk(KERN_WARNING "cciss: unable to get memory");
2941 return IO_ERROR;
2942 }
b57695fe 2943 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2944 scsi3addr, cmd_type);
4a4b2d76
SC		 2945 if (status == IO_OK)
2946 status = sendcmd_core(hba[ctlr], c);
2947 cmd_free(hba[ctlr], c, 1);
e2019b58 2948 return status;
7c832835
BH		 2949}
2950
1da177e4
LT		 2951/*
2952 * Map (physical) PCI mem into (virtual) kernel space
2953 */
2954static void __iomem *remap_pci_mem(ulong base, ulong size)
2955{
7c832835
BH		 2956 ulong page_base = ((ulong) base) & PAGE_MASK;
2957 ulong page_offs = ((ulong) base) - page_base;
2958 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2959
7c832835 2960 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2961}
2962
7c832835
BH		 2963/*
2964 * Takes jobs of the Q and sends them to the hardware, then puts it on
2965 * the Q to wait for completion.
2966 */
2967static void start_io(ctlr_info_t *h)
1da177e4
LT		 2968{
2969 CommandList_struct *c;
7c832835 2970
8a3173de
JA		 2971 while (!hlist_empty(&h->reqQ)) {
2972 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2973 /* can't do anything if fifo is full */
2974 if ((h->access.fifo_full(h))) {
2975 printk(KERN_WARNING "cciss: fifo full\n");
2976 break;
2977 }
2978
7c832835 2979 /* Get the first entry from the Request Q */
8a3173de 2980 removeQ(c);
1da177e4 2981 h->Qdepth--;
7c832835
BH		 2982
2983 /* Tell the controller execute command */
1da177e4 2984 h->access.submit_command(h, c);
7c832835
BH		 2985
2986 /* Put job onto the completed Q */
8a3173de 2987 addQ(&h->cmpQ, c);
1da177e4
LT		 2988 }
2989}
7c832835 2990
1da177e4
LT		 2991/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2992/* Zeros out the error record and then resends the command back */
2993/* to the controller */
7c832835 2994static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2995{
2996 /* erase the old error information */
2997 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2998
2999 /* add it to software queue and then send it to the controller */
8a3173de 3000 addQ(&h->reqQ, c);
1da177e4 3001 h->Qdepth++;
7c832835 3002 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 3003 h->maxQsinceinit = h->Qdepth;
3004
3005 start_io(h);
3006}
a9925a06 3007
1a614f50
SC		 3008static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
3009 unsigned int msg_byte, unsigned int host_byte,
3010 unsigned int driver_byte)
3011{
3012 /* inverse of macros in scsi.h */
3013 return (scsi_status_byte & 0xff) |
3014 ((msg_byte & 0xff) << 8) |
3015 ((host_byte & 0xff) << 16) |
3016 ((driver_byte & 0xff) << 24);
3017}
3018
0a9279cc
MM		 3019static inline int evaluate_target_status(ctlr_info_t *h,
3020 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 3021{
3022 unsigned char sense_key;
1a614f50
SC		 3023 unsigned char status_byte, msg_byte, host_byte, driver_byte;
3024 int error_value;
3025
0a9279cc 3026 *retry_cmd = 0;
1a614f50
SC		 3027 /* If we get in here, it means we got "target status", that is, scsi status */
3028 status_byte = cmd->err_info->ScsiStatus;
3029 driver_byte = DRIVER_OK;
3030 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3031
3032 if (blk_pc_request(cmd->rq))
3033 host_byte = DID_PASSTHROUGH;
3034 else
3035 host_byte = DID_OK;
3036
3037 error_value = make_status_bytes(status_byte, msg_byte,
3038 host_byte, driver_byte);
03bbfee5 3039
1a614f50 3040 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 3041 if (!blk_pc_request(cmd->rq))
3042 printk(KERN_WARNING "cciss: cmd %p "
3043 "has SCSI Status 0x%x\n",
3044 cmd, cmd->err_info->ScsiStatus);
1a614f50 3045 return error_value;
03bbfee5
MMOD		 3046 }
3047
3048 /* check the sense key */
3049 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3050 /* no status or recovered error */
1a614f50
SC		 3051 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
3052 error_value = 0;
03bbfee5 3053
0a9279cc
MM		 3054 if (check_for_unit_attention(h, cmd)) {
3055 *retry_cmd = !blk_pc_request(cmd->rq);
3056 return 0;
3057 }
3058
03bbfee5 3059 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 3060 if (error_value != 0)
03bbfee5
MMOD		 3061 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3062 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3063 return error_value;
03bbfee5
MMOD		 3064 }
3065
3066 /* SG_IO or similar, copy sense data back */
3067 if (cmd->rq->sense) {
3068 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3069 cmd->rq->sense_len = cmd->err_info->SenseLen;
3070 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3071 cmd->rq->sense_len);
3072 } else
3073 cmd->rq->sense_len = 0;
3074
1a614f50 3075 return error_value;
03bbfee5
MMOD		 3076}
3077
7c832835 3078/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3079 * buffers for the completed job. Note that this function does not need
3080 * to hold the hba/queue lock.
7c832835
BH		 3081 */
3082static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3083 int timeout)
1da177e4 3084{
1da177e4 3085 int retry_cmd = 0;
198b7660
MMOD		 3086 struct request *rq = cmd->rq;
3087
3088 rq->errors = 0;
7c832835 3089
1da177e4 3090 if (timeout)
1a614f50 3091 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3092
d38ae168
MMOD		 3093 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3094 goto after_error_processing;
7c832835 3095
d38ae168 3096 switch (cmd->err_info->CommandStatus) {
d38ae168 3097 case CMD_TARGET_STATUS:
0a9279cc 3098 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3099 break;
3100 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3101 if (blk_fs_request(cmd->rq)) {
3102 printk(KERN_WARNING "cciss: cmd %p has"
3103 " completed with data underrun "
3104 "reported\n", cmd);
c3a4d78c 3105 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3106 }
d38ae168
MMOD		 3107 break;
3108 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3109 if (blk_fs_request(cmd->rq))
3110 printk(KERN_WARNING "cciss: cmd %p has"
3111 " completed with data overrun "
3112 "reported\n", cmd);
d38ae168
MMOD		 3113 break;
3114 case CMD_INVALID:
3115 printk(KERN_WARNING "cciss: cmd %p is "
3116 "reported invalid\n", cmd);
1a614f50
SC		 3117 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3118 cmd->err_info->CommandStatus, DRIVER_OK,
3119 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3120 break;
3121 case CMD_PROTOCOL_ERR:
3122 printk(KERN_WARNING "cciss: cmd %p has "
3123 "protocol error \n", cmd);
1a614f50
SC		 3124 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3125 cmd->err_info->CommandStatus, DRIVER_OK,
3126 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3127 break;
3128 case CMD_HARDWARE_ERR:
3129 printk(KERN_WARNING "cciss: cmd %p had "
3130 " hardware error\n", cmd);
1a614f50
SC		 3131 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3132 cmd->err_info->CommandStatus, DRIVER_OK,
3133 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3134 break;
3135 case CMD_CONNECTION_LOST:
3136 printk(KERN_WARNING "cciss: cmd %p had "
3137 "connection lost\n", cmd);
1a614f50
SC		 3138 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3139 cmd->err_info->CommandStatus, DRIVER_OK,
3140 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3141 break;
3142 case CMD_ABORTED:
3143 printk(KERN_WARNING "cciss: cmd %p was "
3144 "aborted\n", cmd);
1a614f50
SC		 3145 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3146 cmd->err_info->CommandStatus, DRIVER_OK,
3147 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3148 break;
3149 case CMD_ABORT_FAILED:
3150 printk(KERN_WARNING "cciss: cmd %p reports "
3151 "abort failed\n", cmd);
1a614f50
SC		 3152 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3153 cmd->err_info->CommandStatus, DRIVER_OK,
3154 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3155 break;
3156 case CMD_UNSOLICITED_ABORT:
3157 printk(KERN_WARNING "cciss%d: unsolicited "
3158 "abort %p\n", h->ctlr, cmd);
3159 if (cmd->retry_count < MAX_CMD_RETRIES) {
3160 retry_cmd = 1;
3161 printk(KERN_WARNING
3162 "cciss%d: retrying %p\n", h->ctlr, cmd);
3163 cmd->retry_count++;
3164 } else
3165 printk(KERN_WARNING
3166 "cciss%d: %p retried too "
3167 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3168 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3169 cmd->err_info->CommandStatus, DRIVER_OK,
3170 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3171 break;
3172 case CMD_TIMEOUT:
3173 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3174 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3175 cmd->err_info->CommandStatus, DRIVER_OK,
3176 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3177 break;
3178 default:
3179 printk(KERN_WARNING "cciss: cmd %p returned "
3180 "unknown status %x\n", cmd,
3181 cmd->err_info->CommandStatus);
1a614f50
SC		 3182 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3183 cmd->err_info->CommandStatus, DRIVER_OK,
3184 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3185 }
d38ae168
MMOD		 3186
3187after_error_processing:
3188
1da177e4 3189 /* We need to return this command */
7c832835
BH		 3190 if (retry_cmd) {
3191 resend_cciss_cmd(h, cmd);
1da177e4 3192 return;
7c832835 3193 }
03bbfee5 3194 cmd->rq->completion_data = cmd;
a9925a06 3195 blk_complete_request(cmd->rq);
1da177e4
LT		 3196}
3197
7c832835
BH		 3198/*
3199 * Get a request and submit it to the controller.
1da177e4 3200 */
165125e1 3201static void do_cciss_request(struct request_queue *q)
1da177e4 3202{
7c832835 3203 ctlr_info_t *h = q->queuedata;
1da177e4 3204 CommandList_struct *c;
00988a35
MMOD		 3205 sector_t start_blk;
3206 int seg;
1da177e4
LT		 3207 struct request *creq;
3208 u64bit temp64;
3209 struct scatterlist tmp_sg[MAXSGENTRIES];
3210 drive_info_struct *drv;
3211 int i, dir;
3212
3213 /* We call start_io here in case there is a command waiting on the
3214 * queue that has not been sent.
7c832835 3215 */
1da177e4
LT		 3216 if (blk_queue_plugged(q))
3217 goto startio;
3218
7c832835 3219 queue:
9934c8c0 3220 creq = blk_peek_request(q);
1da177e4
LT		 3221 if (!creq)
3222 goto startio;
3223
089fe1b2 3224 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3225
7c832835 3226 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3227 goto full;
3228
9934c8c0 3229 blk_start_request(creq);
1da177e4
LT		 3230
3231 spin_unlock_irq(q->queue_lock);
3232
3233 c->cmd_type = CMD_RWREQ;
3234 c->rq = creq;
7c832835
BH		 3235
3236 /* fill in the request */
1da177e4 3237 drv = creq->rq_disk->private_data;
7c832835 3238 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3239 /* got command from pool, so use the command block index instead */
3240 /* for direct lookups. */
3241 /* The first 2 bits are reserved for controller error reporting. */
3242 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3243 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3244 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
7c832835
BH		 3245 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3246 c->Request.Type.Type = TYPE_CMD; // It is a command.
3247 c->Request.Type.Attribute = ATTR_SIMPLE;
3248 c->Request.Type.Direction =
a52de245 3249 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3250 c->Request.Timeout = 0; // Don't time out
3251 c->Request.CDB[0] =
00988a35 3252 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3253 start_blk = blk_rq_pos(creq);
1da177e4 3254#ifdef CCISS_DEBUG
83096ebf
TH		 3255 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3256 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3257#endif /* CCISS_DEBUG */
1da177e4 3258
45711f1a 3259 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3260 seg = blk_rq_map_sg(q, creq, tmp_sg);
3261
7c832835 3262 /* get the DMA records for the setup */
1da177e4
LT		 3263 if (c->Request.Type.Direction == XFER_READ)
3264 dir = PCI_DMA_FROMDEVICE;
3265 else
3266 dir = PCI_DMA_TODEVICE;
3267
7c832835 3268 for (i = 0; i < seg; i++) {
1da177e4 3269 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3270 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3271 tmp_sg[i].offset,
3272 tmp_sg[i].length, dir);
1da177e4 3273 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3274 c->SG[i].Addr.upper = temp64.val32.upper;
3275 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3276 }
7c832835
BH		 3277 /* track how many SG entries we are using */
3278 if (seg > h->maxSG)
3279 h->maxSG = seg;
1da177e4
LT		 3280
3281#ifdef CCISS_DEBUG
83096ebf
TH		 3282 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3283 blk_rq_sectors(creq), seg);
7c832835 3284#endif /* CCISS_DEBUG */
1da177e4
LT		 3285
3286 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3287 if (likely(blk_fs_request(creq))) {
3288 if(h->cciss_read == CCISS_READ_10) {
3289 c->Request.CDB[1] = 0;
3290 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3291 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3292 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3293 c->Request.CDB[5] = start_blk & 0xff;
3294 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3295 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3296 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3297 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3298 } else {
582539e5
RD		 3299 u32 upper32 = upper_32_bits(start_blk);
3300
03bbfee5
MMOD		 3301 c->Request.CDBLen = 16;
3302 c->Request.CDB[1]= 0;
582539e5
RD		 3303 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3304 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3305 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3306 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3307 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3308 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3309 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3310 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3311 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3312 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3313 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3314 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3315 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3316 }
3317 } else if (blk_pc_request(creq)) {
3318 c->Request.CDBLen = creq->cmd_len;
3319 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3320 } else {
03bbfee5
MMOD		 3321 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3322 BUG();
00988a35 3323 }
1da177e4
LT		 3324
3325 spin_lock_irq(q->queue_lock);
3326
8a3173de 3327 addQ(&h->reqQ, c);
1da177e4 3328 h->Qdepth++;
7c832835
BH		 3329 if (h->Qdepth > h->maxQsinceinit)
3330 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3331
3332 goto queue;
00988a35 3333full:
1da177e4 3334 blk_stop_queue(q);
00988a35 3335startio:
1da177e4
LT		 3336 /* We will already have the driver lock here so not need
3337 * to lock it.
7c832835 3338 */
1da177e4
LT		 3339 start_io(h);
3340}
3341
3da8b713 3342static inline unsigned long get_next_completion(ctlr_info_t *h)
3343{
3da8b713 3344 return h->access.command_completed(h);
3da8b713 3345}
3346
3347static inline int interrupt_pending(ctlr_info_t *h)
3348{
3da8b713 3349 return h->access.intr_pending(h);
3da8b713 3350}
3351
3352static inline long interrupt_not_for_us(ctlr_info_t *h)
3353{
7c832835 3354 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3355 (h->interrupts_enabled == 0)));
3da8b713 3356}
3357
7d12e780 3358static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3359{
3360 ctlr_info_t *h = dev_id;
3361 CommandList_struct *c;
3362 unsigned long flags;
33079b21 3363 __u32 a, a1, a2;
1da177e4 3364
3da8b713 3365 if (interrupt_not_for_us(h))
1da177e4 3366 return IRQ_NONE;
1da177e4
LT		 3367 /*
3368 * If there are completed commands in the completion queue,
3369 * we had better do something about it.
3370 */
3371 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3372 while (interrupt_pending(h)) {
7c832835 3373 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3374 a1 = a;
33079b21
MM		 3375 if ((a & 0x04)) {
3376 a2 = (a >> 3);
f880632f 3377 if (a2 >= h->nr_cmds) {
7c832835
BH		 3378 printk(KERN_WARNING
3379 "cciss: controller cciss%d failed, stopping.\n",
3380 h->ctlr);
33079b21
MM		 3381 fail_all_cmds(h->ctlr);
3382 return IRQ_HANDLED;
3383 }
3384
3385 c = h->cmd_pool + a2;
3386 a = c->busaddr;
3387
3388 } else {
8a3173de
JA		 3389 struct hlist_node *tmp;
3390
7c832835 3391 a &= ~3;
8a3173de
JA		 3392 c = NULL;
3393 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3394 if (c->busaddr == a)
7c832835
BH		 3395 break;
3396 }
33079b21 3397 }
1da177e4
LT		 3398 /*
3399 * If we've found the command, take it off the
3400 * completion Q and free it
3401 */
8a3173de
JA		 3402 if (c && c->busaddr == a) {
3403 removeQ(c);
1da177e4
LT		 3404 if (c->cmd_type == CMD_RWREQ) {
3405 complete_command(h, c, 0);
3406 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3407 complete(c->waiting);
3408 }
3409# ifdef CONFIG_CISS_SCSI_TAPE
3410 else if (c->cmd_type == CMD_SCSI)
3411 complete_scsi_command(c, 0, a1);
3412# endif
3413 continue;
3414 }
3415 }
3416 }
3417
1da177e4
LT		 3418 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3419 return IRQ_HANDLED;
3420}
7c832835 3421
b368c9dd
AP		 3422/**
3423 * add_to_scan_list() - add controller to rescan queue
3424 * @h: Pointer to the controller.
3425 *
3426 * Adds the controller to the rescan queue if not already on the queue.
3427 *
3428 * returns 1 if added to the queue, 0 if skipped (could be on the
3429 * queue already, or the controller could be initializing or shutting
3430 * down).
3431 **/
3432static int add_to_scan_list(struct ctlr_info *h)
3433{
3434 struct ctlr_info *test_h;
3435 int found = 0;
3436 int ret = 0;
3437
3438 if (h->busy_initializing)
3439 return 0;
3440
3441 if (!mutex_trylock(&h->busy_shutting_down))
3442 return 0;
3443
3444 mutex_lock(&scan_mutex);
3445 list_for_each_entry(test_h, &scan_q, scan_list) {
3446 if (test_h == h) {
3447 found = 1;
3448 break;
3449 }
3450 }
3451 if (!found && !h->busy_scanning) {
3452 INIT_COMPLETION(h->scan_wait);
3453 list_add_tail(&h->scan_list, &scan_q);
3454 ret = 1;
3455 }
3456 mutex_unlock(&scan_mutex);
3457 mutex_unlock(&h->busy_shutting_down);
3458
3459 return ret;
3460}
3461
3462/**
3463 * remove_from_scan_list() - remove controller from rescan queue
3464 * @h: Pointer to the controller.
3465 *
3466 * Removes the controller from the rescan queue if present. Blocks if
3467 * the controller is currently conducting a rescan.
3468 **/
3469static void remove_from_scan_list(struct ctlr_info *h)
3470{
3471 struct ctlr_info *test_h, *tmp_h;
3472 int scanning = 0;
3473
3474 mutex_lock(&scan_mutex);
3475 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3476 if (test_h == h) {
3477 list_del(&h->scan_list);
3478 complete_all(&h->scan_wait);
3479 mutex_unlock(&scan_mutex);
3480 return;
3481 }
3482 }
3483 if (&h->busy_scanning)
3484 scanning = 0;
3485 mutex_unlock(&scan_mutex);
3486
3487 if (scanning)
3488 wait_for_completion(&h->scan_wait);
3489}
3490
3491/**
3492 * scan_thread() - kernel thread used to rescan controllers
3493 * @data: Ignored.
3494 *
3495 * A kernel thread used scan for drive topology changes on
3496 * controllers. The thread processes only one controller at a time
3497 * using a queue. Controllers are added to the queue using
3498 * add_to_scan_list() and removed from the queue either after done
3499 * processing or using remove_from_scan_list().
3500 *
3501 * returns 0.
3502 **/
0a9279cc
MM		 3503static int scan_thread(void *data)
3504{
b368c9dd 3505 struct ctlr_info *h;
0a9279cc 3506
b368c9dd
AP		 3507 while (1) {
3508 set_current_state(TASK_INTERRUPTIBLE);
3509 schedule();
0a9279cc
MM		 3510 if (kthread_should_stop())
3511 break;
b368c9dd
AP		 3512
3513 while (1) {
3514 mutex_lock(&scan_mutex);
3515 if (list_empty(&scan_q)) {
3516 mutex_unlock(&scan_mutex);
3517 break;
3518 }
3519
3520 h = list_entry(scan_q.next,
3521 struct ctlr_info,
3522 scan_list);
3523 list_del(&h->scan_list);
3524 h->busy_scanning = 1;
3525 mutex_unlock(&scan_mutex);
3526
3527 if (h) {
2d11d993 3528 rebuild_lun_table(h, 0, 0);
b368c9dd
AP		 3529 complete_all(&h->scan_wait);
3530 mutex_lock(&scan_mutex);
3531 h->busy_scanning = 0;
3532 mutex_unlock(&scan_mutex);
3533 }
3534 }
0a9279cc 3535 }
b368c9dd 3536
0a9279cc
MM		 3537 return 0;
3538}
3539
3540static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3541{
3542 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3543 return 0;
3544
3545 switch (c->err_info->SenseInfo[12]) {
3546 case STATE_CHANGED:
3547 printk(KERN_WARNING "cciss%d: a state change "
3548 "detected, command retried\n", h->ctlr);
3549 return 1;
3550 break;
3551 case LUN_FAILED:
3552 printk(KERN_WARNING "cciss%d: LUN failure "
3553 "detected, action required\n", h->ctlr);
3554 return 1;
3555 break;
3556 case REPORT_LUNS_CHANGED:
3557 printk(KERN_WARNING "cciss%d: report LUN data "
3558 "changed\n", h->ctlr);
b368c9dd
AP		 3559 add_to_scan_list(h);
3560 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3561 return 1;
3562 break;
3563 case POWER_OR_RESET:
3564 printk(KERN_WARNING "cciss%d: a power on "
3565 "or device reset detected\n", h->ctlr);
3566 return 1;
3567 break;
3568 case UNIT_ATTENTION_CLEARED:
3569 printk(KERN_WARNING "cciss%d: unit attention "
3570 "cleared by another initiator\n", h->ctlr);
3571 return 1;
3572 break;
3573 default:
3574 printk(KERN_WARNING "cciss%d: unknown "
3575 "unit attention detected\n", h->ctlr);
3576 return 1;
3577 }
3578}
3579
7c832835 3580/*
d14c4ab5 3581 * We cannot read the structure directly, for portability we must use
1da177e4 3582 * the io functions.
7c832835 3583 * This is for debug only.
1da177e4
LT		 3584 */
3585#ifdef CCISS_DEBUG
7c832835 3586static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3587{
3588 int i;
3589 char temp_name[17];
3590
3591 printk("Controller Configuration information\n");
3592 printk("------------------------------------\n");
7c832835 3593 for (i = 0; i < 4; i++)
1da177e4 3594 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3595 temp_name[4] = '\0';
3596 printk(" Signature = %s\n", temp_name);
1da177e4 3597 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3598 printk(" Transport methods supported = 0x%x\n",
3599 readl(&(tb->TransportSupport)));
3600 printk(" Transport methods active = 0x%x\n",
3601 readl(&(tb->TransportActive)));
3602 printk(" Requested transport Method = 0x%x\n",
3603 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3604 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3605 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3606 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3607 readl(&(tb->HostWrite.CoalIntCount)));
3608 printk(" Max outstanding commands = 0x%d\n",
3609 readl(&(tb->CmdsOutMax)));
3610 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3611 for (i = 0; i < 16; i++)
1da177e4
LT		 3612 temp_name[i] = readb(&(tb->ServerName[i]));
3613 temp_name[16] = '\0';
3614 printk(" Server Name = %s\n", temp_name);
7c832835 3615 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3616}
7c832835 3617#endif /* CCISS_DEBUG */
1da177e4 3618
7c832835 3619static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3620{
3621 int i, offset, mem_type, bar_type;
7c832835 3622 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3623 return 0;
3624 offset = 0;
7c832835
BH		 3625 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3626 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3627 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3628 offset += 4;
3629 else {
3630 mem_type = pci_resource_flags(pdev, i) &
7c832835 3631 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3632 switch (mem_type) {
7c832835
BH		 3633 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3634 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3635 offset += 4; /* 32 bit */
3636 break;
3637 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3638 offset += 8;
3639 break;
3640 default: /* reserved in PCI 2.2 */
3641 printk(KERN_WARNING
3642 "Base address is invalid\n");
3643 return -1;
1da177e4
LT		 3644 break;
3645 }
3646 }
7c832835
BH		 3647 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3648 return i + 1;
1da177e4
LT		 3649 }
3650 return -1;
3651}
3652
fb86a35b
MM		 3653/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3654 * controllers that are capable. If not, we use IO-APIC mode.
3655 */
3656
7c832835
BH		 3657static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3658 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3659{
3660#ifdef CONFIG_PCI_MSI
7c832835
BH		 3661 int err;
3662 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3663 {0, 2}, {0, 3}
3664 };
fb86a35b
MM		 3665
3666 /* Some boards advertise MSI but don't really support it */
3667 if ((board_id == 0x40700E11) ||
7c832835
BH		 3668 (board_id == 0x40800E11) ||
3669 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3670 goto default_int_mode;
3671
7c832835
BH		 3672 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3673 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3674 if (!err) {
3675 c->intr[0] = cciss_msix_entries[0].vector;
3676 c->intr[1] = cciss_msix_entries[1].vector;
3677 c->intr[2] = cciss_msix_entries[2].vector;
3678 c->intr[3] = cciss_msix_entries[3].vector;
3679 c->msix_vector = 1;
3680 return;
3681 }
3682 if (err > 0) {
3683 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3684 "available\n", err);
1ecb9c0f 3685 goto default_int_mode;
7c832835
BH		 3686 } else {
3687 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3688 err);
1ecb9c0f 3689 goto default_int_mode;
7c832835
BH		 3690 }
3691 }
3692 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3693 if (!pci_enable_msi(pdev)) {
7c832835 3694 c->msi_vector = 1;
7c832835
BH		 3695 } else {
3696 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3697 }
3698 }
1ecb9c0f 3699default_int_mode:
7c832835 3700#endif /* CONFIG_PCI_MSI */
fb86a35b 3701 /* if we get here we're going to use the default interrupt mode */
7c832835 3702 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3703 return;
3704}
3705
7d1fd970 3706static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3707{
3708 ushort subsystem_vendor_id, subsystem_device_id, command;
3709 __u32 board_id, scratchpad = 0;
3710 __u64 cfg_offset;
3711 __u32 cfg_base_addr;
3712 __u64 cfg_base_addr_index;
c33ac89b 3713 int i, err;
1da177e4
LT		 3714
3715 /* check to see if controller has been disabled */
3716 /* BEFORE trying to enable it */
7c832835
BH		 3717 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3718 if (!(command & 0x02)) {
3719 printk(KERN_WARNING
3720 "cciss: controller appears to be disabled\n");
c33ac89b 3721 return -ENODEV;
1da177e4
LT		 3722 }
3723
c33ac89b 3724 err = pci_enable_device(pdev);
7c832835 3725 if (err) {
1da177e4 3726 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3727 return err;
1da177e4 3728 }
1da177e4 3729
4e570309
BH		 3730 err = pci_request_regions(pdev, "cciss");
3731 if (err) {
3732 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3733 "aborting\n");
872225ca 3734 return err;
4e570309
BH		 3735 }
3736
1da177e4
LT		 3737 subsystem_vendor_id = pdev->subsystem_vendor;
3738 subsystem_device_id = pdev->subsystem_device;
3739 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3740 subsystem_vendor_id);
1da177e4 3741
1da177e4
LT		 3742#ifdef CCISS_DEBUG
3743 printk("command = %x\n", command);
3744 printk("irq = %x\n", pdev->irq);
3745 printk("board_id = %x\n", board_id);
7c832835 3746#endif /* CCISS_DEBUG */
1da177e4 3747
fb86a35b
MM		 3748/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3749 * else we use the IO-APIC interrupt assigned to us by system ROM.
3750 */
3751 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3752
e1438581
MM		 3753 /* find the memory BAR */
3754 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3755 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3756 break;
3757 }
3758 if (i == DEVICE_COUNT_RESOURCE) {
3759 printk(KERN_WARNING "cciss: No memory BAR found\n");
3760 err = -ENODEV;
3761 goto err_out_free_res;
3762 }
3763
3764 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3765 * already removed
3766 */
1da177e4 3767
1da177e4 3768#ifdef CCISS_DEBUG
9f92f471 3769 printk("address 0 = %lx\n", c->paddr);
7c832835 3770#endif /* CCISS_DEBUG */
a5b92873 3771 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3772
3773 /* Wait for the board to become ready. (PCI hotplug needs this.)
3774 * We poll for up to 120 secs, once per 100ms. */
7c832835 3775 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3776 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3777 if (scratchpad == CCISS_FIRMWARE_READY)
3778 break;
3779 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3780 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3781 }
3782 if (scratchpad != CCISS_FIRMWARE_READY) {
3783 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3784 err = -ENODEV;
4e570309 3785 goto err_out_free_res;
1da177e4
LT		 3786 }
3787
3788 /* get the address index number */
3789 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3790 cfg_base_addr &= (__u32) 0x0000ffff;
3791#ifdef CCISS_DEBUG
3792 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3793#endif /* CCISS_DEBUG */
3794 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3795#ifdef CCISS_DEBUG
9f92f471
RD		 3796 printk("cfg base address index = %llx\n",
3797 (unsigned long long)cfg_base_addr_index);
7c832835 3798#endif /* CCISS_DEBUG */
1da177e4
LT		 3799 if (cfg_base_addr_index == -1) {
3800 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3801 err = -ENODEV;
4e570309 3802 goto err_out_free_res;
1da177e4
LT		 3803 }
3804
3805 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3806#ifdef CCISS_DEBUG
9f92f471 3807 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3808#endif /* CCISS_DEBUG */
3809 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3810 cfg_base_addr_index) +
3811 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3812 c->board_id = board_id;
3813
3814#ifdef CCISS_DEBUG
945f390f 3815 print_cfg_table(c->cfgtable);
7c832835 3816#endif /* CCISS_DEBUG */
1da177e4 3817
49153998
MM		 3818 /* Some controllers support Zero Memory Raid (ZMR).
3819 * When configured in ZMR mode the number of supported
3820 * commands drops to 64. So instead of just setting an
3821 * arbitrary value we make the driver a little smarter.
3822 * We read the config table to tell us how many commands
3823 * are supported on the controller then subtract 4 to
3824 * leave a little room for ioctl calls.
3825 */
3826 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3827 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3828 if (board_id == products[i].board_id) {
3829 c->product_name = products[i].product_name;
3830 c->access = *(products[i].access);
49153998 3831 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3832 break;
3833 }
3834 }
7c832835
BH		 3835 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3836 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3837 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3838 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3839 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3840 err = -ENODEV;
4e570309 3841 goto err_out_free_res;
1da177e4 3842 }
4ff9a9a4
MM		 3843 /* We didn't find the controller in our list. We know the
3844 * signature is valid. If it's an HP device let's try to
3845 * bind to the device and fire it up. Otherwise we bail.
3846 */
3847 if (i == ARRAY_SIZE(products)) {
3848 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3849 c->product_name = products[i-1].product_name;
3850 c->access = *(products[i-1].access);
49153998 3851 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3852 printk(KERN_WARNING "cciss: This is an unknown "
3853 "Smart Array controller.\n"
3854 "cciss: Please update to the latest driver "
3855 "available from www.hp.com.\n");
3856 } else {
3857 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3858 " to access the Smart Array controller %08lx\n"
3859 , (unsigned long)board_id);
3860 err = -ENODEV;
3861 goto err_out_free_res;
3862 }
3863 }
1da177e4 3864#ifdef CONFIG_X86
7c832835
BH		 3865 {
3866 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3867 __u32 prefetch;
3868 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3869 prefetch |= 0x100;
3870 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3871 }
1da177e4
LT		 3872#endif
3873
8bf50f71
MMOD		 3874 /* Disabling DMA prefetch and refetch for the P600.
3875 * An ASIC bug may result in accesses to invalid memory addresses.
3876 * We've disabled prefetch for some time now. Testing with XEN
3877 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3878 */
3879 if(board_id == 0x3225103C) {
3880 __u32 dma_prefetch;
8bf50f71 3881 __u32 dma_refetch;
f92e2f5f
MM		 3882 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3883 dma_prefetch |= 0x8000;
3884 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3885 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3886 dma_refetch |= 0x1;
3887 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3888 }
3889
1da177e4
LT		 3890#ifdef CCISS_DEBUG
3891 printk("Trying to put board into Simple mode\n");
7c832835 3892#endif /* CCISS_DEBUG */
1da177e4 3893 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3894 /* Update the field, and then ring the doorbell */
3895 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3896 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3897
3898 /* under certain very rare conditions, this can take awhile.
3899 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3900 * as we enter this code.) */
7c832835 3901 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3902 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3903 break;
3904 /* delay and try again */
3905 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3906 schedule_timeout(msecs_to_jiffies(1));
7c832835 3907 }
1da177e4
LT		 3908
3909#ifdef CCISS_DEBUG
7c832835
BH		 3910 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3911 readl(c->vaddr + SA5_DOORBELL));
3912#endif /* CCISS_DEBUG */
1da177e4 3913#ifdef CCISS_DEBUG
7c832835
BH		 3914 print_cfg_table(c->cfgtable);
3915#endif /* CCISS_DEBUG */
1da177e4 3916
7c832835 3917 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3918 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3919 " simple mode\n");
c33ac89b 3920 err = -ENODEV;
4e570309 3921 goto err_out_free_res;
1da177e4
LT		 3922 }
3923 return 0;
3924
5faad620 3925err_out_free_res:
872225ca
MM		 3926 /*
3927 * Deliberately omit pci_disable_device(): it does something nasty to
3928 * Smart Array controllers that pci_enable_device does not undo
3929 */
4e570309 3930 pci_release_regions(pdev);
c33ac89b 3931 return err;
1da177e4
LT		 3932}
3933
6ae5ce8e
MM		 3934/* Function to find the first free pointer into our hba[] array
3935 * Returns -1 if no free entries are left.
7c832835 3936 */
1da177e4
LT		 3937static int alloc_cciss_hba(void)
3938{
799202cb 3939 int i;
1da177e4 3940
7c832835 3941 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3942 if (!hba[i]) {
3943 ctlr_info_t *p;
f2912a12 3944
06ff37ff 3945 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3946 if (!p)
3947 goto Enomem;
1da177e4
LT		 3948 hba[i] = p;
3949 return i;
3950 }
3951 }
3952 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3953 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3954 return -1;
3955Enomem:
1da177e4 3956 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3957 return -1;
3958}
3959
2c935593 3960static void free_hba(int n)
1da177e4 3961{
2c935593
SC		 3962 ctlr_info_t *h = hba[n];
3963 int i;
1da177e4 3964
2c935593
SC		 3965 hba[n] = NULL;
3966 for (i = 0; i < h->highest_lun + 1; i++)
3967 if (h->gendisk[i] != NULL)
3968 put_disk(h->gendisk[i]);
3969 kfree(h);
1da177e4
LT		 3970}
3971
82eb03cf
CC		 3972/* Send a message CDB to the firmware. */
3973static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3974{
3975 typedef struct {
3976 CommandListHeader_struct CommandHeader;
3977 RequestBlock_struct Request;
3978 ErrDescriptor_struct ErrorDescriptor;
3979 } Command;
3980 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3981 Command *cmd;
3982 dma_addr_t paddr64;
3983 uint32_t paddr32, tag;
3984 void __iomem *vaddr;
3985 int i, err;
3986
3987 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3988 if (vaddr == NULL)
3989 return -ENOMEM;
3990
3991 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3992 CCISS commands, so they must be allocated from the lower 4GiB of
3993 memory. */
e930438c 3994 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3995 if (err) {
3996 iounmap(vaddr);
3997 return -ENOMEM;
3998 }
3999
4000 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4001 if (cmd == NULL) {
4002 iounmap(vaddr);
4003 return -ENOMEM;
4004 }
4005
4006 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4007 although there's no guarantee, we assume that the address is at
4008 least 4-byte aligned (most likely, it's page-aligned). */
4009 paddr32 = paddr64;
4010
4011 cmd->CommandHeader.ReplyQueue = 0;
4012 cmd->CommandHeader.SGList = 0;
4013 cmd->CommandHeader.SGTotal = 0;
4014 cmd->CommandHeader.Tag.lower = paddr32;
4015 cmd->CommandHeader.Tag.upper = 0;
4016 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4017
4018 cmd->Request.CDBLen = 16;
4019 cmd->Request.Type.Type = TYPE_MSG;
4020 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4021 cmd->Request.Type.Direction = XFER_NONE;
4022 cmd->Request.Timeout = 0; /* Don't time out */
4023 cmd->Request.CDB[0] = opcode;
4024 cmd->Request.CDB[1] = type;
4025 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4026
4027 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4028 cmd->ErrorDescriptor.Addr.upper = 0;
4029 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4030
4031 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4032
4033 for (i = 0; i < 10; i++) {
4034 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4035 if ((tag & ~3) == paddr32)
4036 break;
4037 schedule_timeout_uninterruptible(HZ);
4038 }
4039
4040 iounmap(vaddr);
4041
4042 /* we leak the DMA buffer here ... no choice since the controller could
4043 still complete the command. */
4044 if (i == 10) {
4045 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4046 opcode, type);
4047 return -ETIMEDOUT;
4048 }
4049
4050 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4051
4052 if (tag & 2) {
4053 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4054 opcode, type);
4055 return -EIO;
4056 }
4057
4058 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4059 opcode, type);
4060 return 0;
4061}
4062
4063#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4064#define cciss_noop(p) cciss_message(p, 3, 0)
4065
4066static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4067{
4068/* the #defines are stolen from drivers/pci/msi.h. */
4069#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4070#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4071
4072 int pos;
4073 u16 control = 0;
4074
4075 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4076 if (pos) {
4077 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4078 if (control & PCI_MSI_FLAGS_ENABLE) {
4079 printk(KERN_INFO "cciss: resetting MSI\n");
4080 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4081 }
4082 }
4083
4084 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4085 if (pos) {
4086 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4087 if (control & PCI_MSIX_FLAGS_ENABLE) {
4088 printk(KERN_INFO "cciss: resetting MSI-X\n");
4089 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4090 }
4091 }
4092
4093 return 0;
4094}
4095
4096/* This does a hard reset of the controller using PCI power management
4097 * states. */
4098static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4099{
4100 u16 pmcsr, saved_config_space[32];
4101 int i, pos;
4102
4103 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4104
4105 /* This is very nearly the same thing as
4106
4107 pci_save_state(pci_dev);
4108 pci_set_power_state(pci_dev, PCI_D3hot);
4109 pci_set_power_state(pci_dev, PCI_D0);
4110 pci_restore_state(pci_dev);
4111
4112 but we can't use these nice canned kernel routines on
4113 kexec, because they also check the MSI/MSI-X state in PCI
4114 configuration space and do the wrong thing when it is
4115 set/cleared. Also, the pci_save/restore_state functions
4116 violate the ordering requirements for restoring the
4117 configuration space from the CCISS document (see the
4118 comment below). So we roll our own .... */
4119
4120 for (i = 0; i < 32; i++)
4121 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4122
4123 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4124 if (pos == 0) {
4125 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4126 return -ENODEV;
4127 }
4128
4129 /* Quoting from the Open CISS Specification: "The Power
4130 * Management Control/Status Register (CSR) controls the power
4131 * state of the device. The normal operating state is D0,
4132 * CSR=00h. The software off state is D3, CSR=03h. To reset
4133 * the controller, place the interface device in D3 then to
4134 * D0, this causes a secondary PCI reset which will reset the
4135 * controller." */
4136
4137 /* enter the D3hot power management state */
4138 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4139 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4140 pmcsr |= PCI_D3hot;
4141 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4142
4143 schedule_timeout_uninterruptible(HZ >> 1);
4144
4145 /* enter the D0 power management state */
4146 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4147 pmcsr |= PCI_D0;
4148 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4149
4150 schedule_timeout_uninterruptible(HZ >> 1);
4151
4152 /* Restore the PCI configuration space. The Open CISS
4153 * Specification says, "Restore the PCI Configuration
4154 * Registers, offsets 00h through 60h. It is important to
4155 * restore the command register, 16-bits at offset 04h,
4156 * last. Do not restore the configuration status register,
4157 * 16-bits at offset 06h." Note that the offset is 2*i. */
4158 for (i = 0; i < 32; i++) {
4159 if (i == 2 || i == 3)
4160 continue;
4161 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4162 }
4163 wmb();
4164 pci_write_config_word(pdev, 4, saved_config_space[2]);
4165
4166 return 0;
4167}
4168
1da177e4
LT		 4169/*
4170 * This is it. Find all the controllers and register them. I really hate
4171 * stealing all these major device numbers.
4172 * returns the number of block devices registered.
4173 */
4174static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4175 const struct pci_device_id *ent)
1da177e4 4176{
1da177e4 4177 int i;
799202cb 4178 int j = 0;
1da177e4 4179 int rc;
22bece00 4180 int dac, return_code;
212a5026 4181 InquiryData_struct *inq_buff;
1da177e4 4182
82eb03cf
CC		 4183 if (reset_devices) {
4184 /* Reset the controller with a PCI power-cycle */
4185 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4186 return -ENODEV;
4187
5e18cfd0
JA		 4188 /* Now try to get the controller to respond to a no-op. Some
4189 devices (notably the HP Smart Array 5i Controller) need
4190 up to 30 seconds to respond. */
5e4c91c8 4191 for (i=0; i<30; i++) {
82eb03cf
CC		 4192 if (cciss_noop(pdev) == 0)
4193 break;
5e4c91c8
JA		 4194
4195 schedule_timeout_uninterruptible(HZ);
4196 }
4197 if (i == 30) {
4198 printk(KERN_ERR "cciss: controller seems dead\n");
4199 return -EBUSY;
82eb03cf
CC		 4200 }
4201 }
4202
1da177e4 4203 i = alloc_cciss_hba();
7c832835 4204 if (i < 0)
e2019b58 4205 return -1;
1f8ef380
MM		 4206
4207 hba[i]->busy_initializing = 1;
8a3173de
JA		 4208 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4209 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4210 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4211
1da177e4 4212 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4213 goto clean0;
1da177e4
LT		 4214
4215 sprintf(hba[i]->devname, "cciss%d", i);
4216 hba[i]->ctlr = i;
4217 hba[i]->pdev = pdev;
4218
b368c9dd
AP		 4219 init_completion(&hba[i]->scan_wait);
4220
7fe06326
AP		 4221 if (cciss_create_hba_sysfs_entry(hba[i]))
4222 goto clean0;
4223
1da177e4 4224 /* configure PCI DMA stuff */
6a35528a 4225 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4226 dac = 1;
284901a9 4227 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4228 dac = 0;
1da177e4 4229 else {
40aabb58 4230 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4231 goto clean1;
4232 }
4233
4234 /*
4235 * register with the major number, or get a dynamic major number
4236 * by passing 0 as argument. This is done for greater than
4237 * 8 controller support.
4238 */
4239 if (i < MAX_CTLR_ORIG)
564de74a 4240 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4241 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4242 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4243 printk(KERN_ERR
7c832835
BH		 4244 "cciss: Unable to get major number %d for %s "
4245 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4246 goto clean1;
7c832835 4247 } else {
1da177e4
LT		 4248 if (i >= MAX_CTLR_ORIG)
4249 hba[i]->major = rc;
4250 }
4251
4252 /* make sure the board interrupts are off */
4253 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4254 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4255 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4256 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4257 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4258 goto clean2;
4259 }
40aabb58
BH		 4260
4261 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4262 hba[i]->devname, pdev->device, pci_name(pdev),
4263 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4264
4265 hba[i]->cmd_pool_bits =
061837bc
JL		 4266 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4267 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4268 hba[i]->cmd_pool = (CommandList_struct *)
4269 pci_alloc_consistent(hba[i]->pdev,
f880632f 4270 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4271 &(hba[i]->cmd_pool_dhandle));
4272 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4273 pci_alloc_consistent(hba[i]->pdev,
f880632f 4274 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4275 &(hba[i]->errinfo_pool_dhandle));
4276 if ((hba[i]->cmd_pool_bits == NULL)
4277 || (hba[i]->cmd_pool == NULL)
4278 || (hba[i]->errinfo_pool == NULL)) {
4279 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4280 goto clean4;
4281 }
1da177e4 4282 spin_lock_init(&hba[i]->lock);
1da177e4 4283
7c832835
BH		 4284 /* Initialize the pdev driver private data.
4285 have it point to hba[i]. */
1da177e4 4286 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4287 /* command and error info recs zeroed out before
4288 they are used */
4289 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4290 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4291 * sizeof(unsigned long));
1da177e4 4292
6ae5ce8e
MM		 4293 hba[i]->num_luns = 0;
4294 hba[i]->highest_lun = -1;
4295 for (j = 0; j < CISS_MAX_LUN; j++) {
4296 hba[i]->drv[j].raid_level = -1;
4297 hba[i]->drv[j].queue = NULL;
4298 hba[i]->gendisk[j] = NULL;
4299 }
1da177e4
LT		 4300
4301 cciss_scsi_setup(i);
4302
4303 /* Turn the interrupts on so we can service requests */
4304 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4305
22bece00
MM		 4306 /* Get the firmware version */
4307 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4308 if (inq_buff == NULL) {
4309 printk(KERN_ERR "cciss: out of memory\n");
4310 goto clean4;
4311 }
4312
4313 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4314 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4315 if (return_code == IO_OK) {
4316 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4317 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4318 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4319 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4320 } else { /* send command failed */
4321 printk(KERN_WARNING "cciss: unable to determine firmware"
4322 " version of controller\n");
4323 }
212a5026 4324 kfree(inq_buff);
22bece00 4325
1da177e4 4326 cciss_procinit(i);
92c4231a
MM		 4327
4328 hba[i]->cciss_max_sectors = 2048;
4329
2d11d993 4330 rebuild_lun_table(hba[i], 1, 0);
b368c9dd 4331 hba[i]->busy_initializing = 0;
e2019b58 4332 return 1;
1da177e4 4333
6ae5ce8e 4334clean4:
6044ec88 4335 kfree(hba[i]->cmd_pool_bits);
7c832835 4336 if (hba[i]->cmd_pool)
1da177e4 4337 pci_free_consistent(hba[i]->pdev,
f880632f 4338 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4339 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4340 if (hba[i]->errinfo_pool)
1da177e4 4341 pci_free_consistent(hba[i]->pdev,
f880632f 4342 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4343 hba[i]->errinfo_pool,
4344 hba[i]->errinfo_pool_dhandle);
fb86a35b 4345 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4346clean2:
1da177e4 4347 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4348clean1:
7fe06326
AP		 4349 cciss_destroy_hba_sysfs_entry(hba[i]);
4350clean0:
1f8ef380 4351 hba[i]->busy_initializing = 0;
799202cb
MM		 4352 /* cleanup any queues that may have been initialized */
4353 for (j=0; j <= hba[i]->highest_lun; j++){
4354 drive_info_struct *drv = &(hba[i]->drv[j]);
4355 if (drv->queue)
4356 blk_cleanup_queue(drv->queue);
4357 }
872225ca
MM		 4358 /*
4359 * Deliberately omit pci_disable_device(): it does something nasty to
4360 * Smart Array controllers that pci_enable_device does not undo
4361 */
799202cb 4362 pci_release_regions(pdev);
799202cb 4363 pci_set_drvdata(pdev, NULL);
61808c2b 4364 free_hba(i);
e2019b58 4365 return -1;
1da177e4
LT		 4366}
4367
e9ca75b5 4368static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4369{
4370 ctlr_info_t *tmp_ptr;
e9ca75b5 4371 int i;
1da177e4 4372 char flush_buf[4];
7c832835 4373 int return_code;
1da177e4 4374
e9ca75b5
GB		 4375 tmp_ptr = pci_get_drvdata(pdev);
4376 if (tmp_ptr == NULL)
4377 return;
4378 i = tmp_ptr->ctlr;
4379 if (hba[i] == NULL)
4380 return;
4381
4382 /* Turn board interrupts off and send the flush cache command */
4383 /* sendcmd will turn off interrupt, and send the flush...
4384 * To write all data in the battery backed cache to disks */
4385 memset(flush_buf, 0, 4);
b57695fe 4386 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4387 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4388 if (return_code == IO_OK) {
4389 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4390 } else {
4391 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4392 }
4393 free_irq(hba[i]->intr[2], hba[i]);
4394}
4395
4396static void __devexit cciss_remove_one(struct pci_dev *pdev)
4397{
4398 ctlr_info_t *tmp_ptr;
4399 int i, j;
4400
7c832835
BH		 4401 if (pci_get_drvdata(pdev) == NULL) {
4402 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4403 return;
4404 }
0a9279cc 4405
1da177e4
LT		 4406 tmp_ptr = pci_get_drvdata(pdev);
4407 i = tmp_ptr->ctlr;
7c832835 4408 if (hba[i] == NULL) {
1da177e4 4409 printk(KERN_ERR "cciss: device appears to "
7c832835 4410 "already be removed \n");
1da177e4
LT		 4411 return;
4412 }
b6550777 4413
b368c9dd 4414 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4415
b368c9dd 4416 remove_from_scan_list(hba[i]);
b6550777
BH		 4417 remove_proc_entry(hba[i]->devname, proc_cciss);
4418 unregister_blkdev(hba[i]->major, hba[i]->devname);
4419
4420 /* remove it from the disk list */
4421 for (j = 0; j < CISS_MAX_LUN; j++) {
4422 struct gendisk *disk = hba[i]->gendisk[j];
4423 if (disk) {
165125e1 4424 struct request_queue *q = disk->queue;
b6550777 4425
097d0264 4426 if (disk->flags & GENHD_FL_UP) {
8ce51966 4427 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4428 del_gendisk(disk);
097d0264 4429 }
b6550777
BH		 4430 if (q)
4431 blk_cleanup_queue(q);
4432 }
4433 }
4434
ba198efb 4435#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4436 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4437#endif
b6550777 4438
e9ca75b5 4439 cciss_shutdown(pdev);
fb86a35b
MM		 4440
4441#ifdef CONFIG_PCI_MSI
7c832835
BH		 4442 if (hba[i]->msix_vector)
4443 pci_disable_msix(hba[i]->pdev);
4444 else if (hba[i]->msi_vector)
4445 pci_disable_msi(hba[i]->pdev);
4446#endif /* CONFIG_PCI_MSI */
fb86a35b 4447
1da177e4 4448 iounmap(hba[i]->vaddr);
1da177e4 4449
f880632f 4450 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4451 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4452 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4453 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4454 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4455 /*
4456 * Deliberately omit pci_disable_device(): it does something nasty to
4457 * Smart Array controllers that pci_enable_device does not undo
4458 */
7c832835 4459 pci_release_regions(pdev);
4e570309 4460 pci_set_drvdata(pdev, NULL);
7fe06326 4461 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4462 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4463 free_hba(i);
7c832835 4464}
1da177e4
LT		 4465
4466static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4467 .name = "cciss",
4468 .probe = cciss_init_one,
4469 .remove = __devexit_p(cciss_remove_one),
4470 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4471 .shutdown = cciss_shutdown,
1da177e4
LT		 4472};
4473
4474/*
4475 * This is it. Register the PCI driver information for the cards we control
7c832835 4476 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4477 */
4478static int __init cciss_init(void)
4479{
7fe06326
AP		 4480 int err;
4481
10cbda97
JA		 4482 /*
4483 * The hardware requires that commands are aligned on a 64-bit
4484 * boundary. Given that we use pci_alloc_consistent() to allocate an
4485 * array of them, the size must be a multiple of 8 bytes.
4486 */
4487 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4488
1da177e4
LT		 4489 printk(KERN_INFO DRIVER_NAME "\n");
4490
7fe06326
AP		 4491 err = bus_register(&cciss_bus_type);
4492 if (err)
4493 return err;
4494
b368c9dd
AP		 4495 /* Start the scan thread */
4496 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4497 if (IS_ERR(cciss_scan_thread)) {
4498 err = PTR_ERR(cciss_scan_thread);
4499 goto err_bus_unregister;
4500 }
4501
1da177e4 4502 /* Register for our PCI devices */
7fe06326
AP		 4503 err = pci_register_driver(&cciss_pci_driver);
4504 if (err)
b368c9dd 4505 goto err_thread_stop;
7fe06326 4506
617e1344 4507 return err;
7fe06326 4508
b368c9dd
AP		 4509err_thread_stop:
4510 kthread_stop(cciss_scan_thread);
4511err_bus_unregister:
7fe06326 4512 bus_unregister(&cciss_bus_type);
b368c9dd 4513
7fe06326 4514 return err;
1da177e4
LT		 4515}
4516
4517static void __exit cciss_cleanup(void)
4518{
4519 int i;
4520
4521 pci_unregister_driver(&cciss_pci_driver);
4522 /* double check that all controller entrys have been removed */
7c832835
BH		 4523 for (i = 0; i < MAX_CTLR; i++) {
4524 if (hba[i] != NULL) {
1da177e4 4525 printk(KERN_WARNING "cciss: had to remove"
7c832835 4526 " controller %d\n", i);
1da177e4
LT		 4527 cciss_remove_one(hba[i]->pdev);
4528 }
4529 }
b368c9dd 4530 kthread_stop(cciss_scan_thread);
928b4d8c 4531 remove_proc_entry("driver/cciss", NULL);
7fe06326 4532 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4533}
4534
33079b21
MM		 4535static void fail_all_cmds(unsigned long ctlr)
4536{
4537 /* If we get here, the board is apparently dead. */
4538 ctlr_info_t *h = hba[ctlr];
4539 CommandList_struct *c;
4540 unsigned long flags;
4541
4542 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4543 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4544
4545 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4546
7c832835 4547 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4548
4549 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4550 while (!hlist_empty(&h->reqQ)) {
4551 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4552 removeQ(c);
33079b21 4553 h->Qdepth--;
8a3173de 4554 addQ(&h->cmpQ, c);
33079b21
MM		 4555 }
4556
4557 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4558 while (!hlist_empty(&h->cmpQ)) {
4559 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4560 removeQ(c);
b59e64d0
HR		 4561 if (c->cmd_type != CMD_MSG_STALE)
4562 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4563 if (c->cmd_type == CMD_RWREQ) {
4564 complete_command(h, c, 0);
4565 } else if (c->cmd_type == CMD_IOCTL_PEND)
4566 complete(c->waiting);
4567#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4568 else if (c->cmd_type == CMD_SCSI)
4569 complete_scsi_command(c, 0, 0);
33079b21
MM		 4570#endif
4571 }
4572 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4573 return;
4574}
4575
1da177e4
LT		 4576module_init(cciss_init);
4577module_exit(cciss_cleanup);
Linux kernel - Deliverables
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