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cciss: clarify command list padding calculation
[deliverable/linux.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68MODULE_VERSION("3.6.20");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
2ec24ff1
SC		 71static int cciss_allow_hpsa;
72module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
73MODULE_PARM_DESC(cciss_allow_hpsa,
74 "Prevent cciss driver from accessing hardware known to be "
75 " supported by the hpsa driver");
76
1da177e4
LT		 77#include "cciss_cmd.h"
78#include "cciss.h"
79#include <linux/cciss_ioctl.h>
80
81/* define the PCI info for the cards we can control */
82static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
90 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
91 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
1da177e4
LT		 110 {0,}
111};
7c832835 112
1da177e4
LT		 113MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
114
1da177e4
LT		 115/* board_id = Subsystem Device ID & Vendor ID
116 * product = Marketing Name for the board
7c832835 117 * access = Address of the struct of function pointers
1da177e4
LT		 118 */
119static struct board_type products[] = {
49153998
MM		 120 {0x40700E11, "Smart Array 5300", &SA5_access},
121 {0x40800E11, "Smart Array 5i", &SA5B_access},
122 {0x40820E11, "Smart Array 532", &SA5B_access},
123 {0x40830E11, "Smart Array 5312", &SA5B_access},
124 {0x409A0E11, "Smart Array 641", &SA5_access},
125 {0x409B0E11, "Smart Array 642", &SA5_access},
126 {0x409C0E11, "Smart Array 6400", &SA5_access},
127 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
128 {0x40910E11, "Smart Array 6i", &SA5_access},
129 {0x3225103C, "Smart Array P600", &SA5_access},
49153998
MM		 130 {0x3235103C, "Smart Array P400i", &SA5_access},
131 {0x3211103C, "Smart Array E200i", &SA5_access},
132 {0x3212103C, "Smart Array E200", &SA5_access},
133 {0x3213103C, "Smart Array E200i", &SA5_access},
134 {0x3214103C, "Smart Array E200i", &SA5_access},
135 {0x3215103C, "Smart Array E200i", &SA5_access},
136 {0x3237103C, "Smart Array E500", &SA5_access},
2ec24ff1
SC		 137/* controllers below this line are also supported by the hpsa driver. */
138#define HPSA_BOUNDARY 0x3223103C
139 {0x3223103C, "Smart Array P800", &SA5_access},
140 {0x3234103C, "Smart Array P400", &SA5_access},
49153998
MM		 141 {0x323D103C, "Smart Array P700m", &SA5_access},
142 {0x3241103C, "Smart Array P212", &SA5_access},
143 {0x3243103C, "Smart Array P410", &SA5_access},
144 {0x3245103C, "Smart Array P410i", &SA5_access},
145 {0x3247103C, "Smart Array P411", &SA5_access},
146 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 147 {0x324A103C, "Smart Array P712m", &SA5_access},
148 {0x324B103C, "Smart Array P711m", &SA5_access},
1da177e4
LT		 149};
150
d14c4ab5 151/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 152#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 153#define MAX_IOCTL_CONFIG_WAIT 1000
154
155/*define how many times we will try a command because of bus resets */
156#define MAX_CMD_RETRIES 3
157
1da177e4
LT		 158#define MAX_CTLR 32
159
160/* Originally cciss driver only supports 8 major numbers */
161#define MAX_CTLR_ORIG 8
162
1da177e4
LT		 163static ctlr_info_t *hba[MAX_CTLR];
164
b368c9dd
AP		 165static struct task_struct *cciss_scan_thread;
166static DEFINE_MUTEX(scan_mutex);
167static LIST_HEAD(scan_q);
168
165125e1 169static void do_cciss_request(struct request_queue *q);
7d12e780 170static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 171static int cciss_open(struct block_device *bdev, fmode_t mode);
172static int cciss_release(struct gendisk *disk, fmode_t mode);
173static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 174 unsigned int cmd, unsigned long arg);
a885c8c4 175static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 176
1da177e4 177static int cciss_revalidate(struct gendisk *disk);
2d11d993 178static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 179static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 180 int clear_all, int via_ioctl);
1da177e4 181
7b838bde 182static void cciss_read_capacity(int ctlr, int logvol,
00988a35 183 sector_t *total_size, unsigned int *block_size);
7b838bde 184static void cciss_read_capacity_16(int ctlr, int logvol,
00988a35
MMOD		 185 sector_t *total_size, unsigned int *block_size);
186static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 187 sector_t total_size,
00988a35 188 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 189 drive_info_struct *drv);
7c832835
BH		 190static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
191 __u32);
192static void start_io(ctlr_info_t *h);
7c832835 193static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 194 __u8 page_code, unsigned char scsi3addr[],
195 int cmd_type);
85cc61ae 196static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
197 int attempt_retry);
198static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 199
33079b21 200static void fail_all_cmds(unsigned long ctlr);
d6f4965d 201static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 202static int scan_thread(void *data);
203static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 204static void cciss_hba_release(struct device *dev);
205static void cciss_device_release(struct device *dev);
361e9b07 206static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
9cef0d2f 207static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
33079b21 208
1da177e4 209#ifdef CONFIG_PROC_FS
1da177e4
LT		 210static void cciss_procinit(int i);
211#else
7c832835
BH		 212static void cciss_procinit(int i)
213{
214}
215#endif /* CONFIG_PROC_FS */
1da177e4
LT		 216
217#ifdef CONFIG_COMPAT
ef7822c2
AV		 218static int cciss_compat_ioctl(struct block_device *, fmode_t,
219 unsigned, unsigned long);
1da177e4
LT		 220#endif
221
83d5cde4 222static const struct block_device_operations cciss_fops = {
7c832835 223 .owner = THIS_MODULE,
ef7822c2
AV		 224 .open = cciss_open,
225 .release = cciss_release,
226 .locked_ioctl = cciss_ioctl,
7c832835 227 .getgeo = cciss_getgeo,
1da177e4 228#ifdef CONFIG_COMPAT
ef7822c2 229 .compat_ioctl = cciss_compat_ioctl,
1da177e4 230#endif
7c832835 231 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 232};
233
234/*
235 * Enqueuing and dequeuing functions for cmdlists.
236 */
8a3173de 237static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 238{
8a3173de 239 hlist_add_head(&c->list, list);
1da177e4
LT		 240}
241
8a3173de 242static inline void removeQ(CommandList_struct *c)
1da177e4 243{
b59e64d0
HR		 244 /*
245 * After kexec/dump some commands might still
246 * be in flight, which the firmware will try
247 * to complete. Resetting the firmware doesn't work
248 * with old fw revisions, so we have to mark
249 * them off as 'stale' to prevent the driver from
250 * falling over.
251 */
252 if (WARN_ON(hlist_unhashed(&c->list))) {
253 c->cmd_type = CMD_MSG_STALE;
8a3173de 254 return;
b59e64d0 255 }
8a3173de
JA		 256
257 hlist_del_init(&c->list);
1da177e4
LT		 258}
259
260#include "cciss_scsi.c" /* For SCSI tape support */
261
1e6f2dc1
AB		 262static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
263 "UNKNOWN"
264};
265#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
0f5486ec 266
1da177e4
LT		 267#ifdef CONFIG_PROC_FS
268
269/*
270 * Report information about this controller.
271 */
272#define ENG_GIG 1000000000
273#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 274#define ENGAGE_SCSI "engage scsi"
1da177e4
LT		 275
276static struct proc_dir_entry *proc_cciss;
277
89b6e743 278static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 279{
89b6e743
MM		 280 ctlr_info_t *h = seq->private;
281
282 seq_printf(seq, "%s: HP %s Controller\n"
283 "Board ID: 0x%08lx\n"
284 "Firmware Version: %c%c%c%c\n"
285 "IRQ: %d\n"
286 "Logical drives: %d\n"
287 "Current Q depth: %d\n"
288 "Current # commands on controller: %d\n"
289 "Max Q depth since init: %d\n"
290 "Max # commands on controller since init: %d\n"
291 "Max SG entries since init: %d\n",
292 h->devname,
293 h->product_name,
294 (unsigned long)h->board_id,
295 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
296 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
297 h->num_luns,
298 h->Qdepth, h->commands_outstanding,
299 h->maxQsinceinit, h->max_outstanding, h->maxSG);
300
301#ifdef CONFIG_CISS_SCSI_TAPE
302 cciss_seq_tape_report(seq, h->ctlr);
303#endif /* CONFIG_CISS_SCSI_TAPE */
304}
1da177e4 305
89b6e743
MM		 306static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
307{
308 ctlr_info_t *h = seq->private;
309 unsigned ctlr = h->ctlr;
310 unsigned long flags;
1da177e4
LT		 311
312 /* prevent displaying bogus info during configuration
313 * or deconfiguration of a logical volume
314 */
315 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
316 if (h->busy_configuring) {
317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 318 return ERR_PTR(-EBUSY);
1da177e4
LT		 319 }
320 h->busy_configuring = 1;
321 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
322
89b6e743
MM		 323 if (*pos == 0)
324 cciss_seq_show_header(seq);
325
326 return pos;
327}
328
329static int cciss_seq_show(struct seq_file *seq, void *v)
330{
331 sector_t vol_sz, vol_sz_frac;
332 ctlr_info_t *h = seq->private;
333 unsigned ctlr = h->ctlr;
334 loff_t *pos = v;
9cef0d2f 335 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 336
337 if (*pos > h->highest_lun)
338 return 0;
339
531c2dc7
SC		 340 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
341 return 0;
342
89b6e743
MM		 343 if (drv->heads == 0)
344 return 0;
345
346 vol_sz = drv->nr_blocks;
347 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
348 vol_sz_frac *= 100;
349 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
350
fa52bec9 351 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 352 drv->raid_level = RAID_UNKNOWN;
353 seq_printf(seq, "cciss/c%dd%d:"
354 "\t%4u.%02uGB\tRAID %s\n",
355 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
356 raid_label[drv->raid_level]);
357 return 0;
358}
359
360static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
361{
362 ctlr_info_t *h = seq->private;
363
364 if (*pos > h->highest_lun)
365 return NULL;
366 *pos += 1;
367
368 return pos;
369}
370
371static void cciss_seq_stop(struct seq_file *seq, void *v)
372{
373 ctlr_info_t *h = seq->private;
374
375 /* Only reset h->busy_configuring if we succeeded in setting
376 * it during cciss_seq_start. */
377 if (v == ERR_PTR(-EBUSY))
378 return;
7c832835 379
1da177e4 380 h->busy_configuring = 0;
1da177e4
LT		 381}
382
88e9d34c 383static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 384 .start = cciss_seq_start,
385 .show = cciss_seq_show,
386 .next = cciss_seq_next,
387 .stop = cciss_seq_stop,
388};
389
390static int cciss_seq_open(struct inode *inode, struct file *file)
391{
392 int ret = seq_open(file, &cciss_seq_ops);
393 struct seq_file *seq = file->private_data;
394
395 if (!ret)
396 seq->private = PDE(inode)->data;
397
398 return ret;
399}
400
401static ssize_t
402cciss_proc_write(struct file *file, const char __user *buf,
403 size_t length, loff_t *ppos)
1da177e4 404{
89b6e743
MM		 405 int err;
406 char *buffer;
407
408#ifndef CONFIG_CISS_SCSI_TAPE
409 return -EINVAL;
1da177e4
LT		 410#endif
411
89b6e743 412 if (!buf || length > PAGE_SIZE - 1)
7c832835 413 return -EINVAL;
89b6e743
MM		 414
415 buffer = (char *)__get_free_page(GFP_KERNEL);
416 if (!buffer)
417 return -ENOMEM;
418
419 err = -EFAULT;
420 if (copy_from_user(buffer, buf, length))
421 goto out;
422 buffer[length] = '\0';
423
424#ifdef CONFIG_CISS_SCSI_TAPE
425 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
426 struct seq_file *seq = file->private_data;
427 ctlr_info_t *h = seq->private;
89b6e743 428
8721c81f
SC		 429 err = cciss_engage_scsi(h->ctlr);
430 if (err == 0)
89b6e743
MM		 431 err = length;
432 } else
433#endif /* CONFIG_CISS_SCSI_TAPE */
434 err = -EINVAL;
7c832835
BH		 435 /* might be nice to have "disengage" too, but it's not
436 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 437
438out:
439 free_page((unsigned long)buffer);
440 return err;
1da177e4
LT		 441}
442
828c0950 443static const struct file_operations cciss_proc_fops = {
89b6e743
MM		 444 .owner = THIS_MODULE,
445 .open = cciss_seq_open,
446 .read = seq_read,
447 .llseek = seq_lseek,
448 .release = seq_release,
449 .write = cciss_proc_write,
450};
451
1da177e4
LT		 452static void __devinit cciss_procinit(int i)
453{
454 struct proc_dir_entry *pde;
455
89b6e743 456 if (proc_cciss == NULL)
928b4d8c 457 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 458 if (!proc_cciss)
459 return;
3dfcf9c4 460 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 461 S_IROTH, proc_cciss,
3dfcf9c4 462 &cciss_proc_fops, hba[i]);
1da177e4 463}
7c832835 464#endif /* CONFIG_PROC_FS */
1da177e4 465
7fe06326
AP		 466#define MAX_PRODUCT_NAME_LEN 19
467
468#define to_hba(n) container_of(n, struct ctlr_info, dev)
469#define to_drv(n) container_of(n, drive_info_struct, dev)
470
d6f4965d
AP		 471static ssize_t host_store_rescan(struct device *dev,
472 struct device_attribute *attr,
473 const char *buf, size_t count)
474{
475 struct ctlr_info *h = to_hba(dev);
476
477 add_to_scan_list(h);
478 wake_up_process(cciss_scan_thread);
479 wait_for_completion_interruptible(&h->scan_wait);
480
481 return count;
482}
8ba95c69 483static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 484
485static ssize_t dev_show_unique_id(struct device *dev,
486 struct device_attribute *attr,
487 char *buf)
488{
489 drive_info_struct *drv = to_drv(dev);
490 struct ctlr_info *h = to_hba(drv->dev.parent);
491 __u8 sn[16];
492 unsigned long flags;
493 int ret = 0;
494
495 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
496 if (h->busy_configuring)
497 ret = -EBUSY;
498 else
499 memcpy(sn, drv->serial_no, sizeof(sn));
500 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
501
502 if (ret)
503 return ret;
504 else
505 return snprintf(buf, 16 * 2 + 2,
506 "%02X%02X%02X%02X%02X%02X%02X%02X"
507 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
508 sn[0], sn[1], sn[2], sn[3],
509 sn[4], sn[5], sn[6], sn[7],
510 sn[8], sn[9], sn[10], sn[11],
511 sn[12], sn[13], sn[14], sn[15]);
512}
8ba95c69 513static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP		 514
515static ssize_t dev_show_vendor(struct device *dev,
516 struct device_attribute *attr,
517 char *buf)
518{
519 drive_info_struct *drv = to_drv(dev);
520 struct ctlr_info *h = to_hba(drv->dev.parent);
521 char vendor[VENDOR_LEN + 1];
522 unsigned long flags;
523 int ret = 0;
524
525 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
526 if (h->busy_configuring)
527 ret = -EBUSY;
528 else
529 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
530 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
531
532 if (ret)
533 return ret;
534 else
535 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
536}
8ba95c69 537static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP		 538
539static ssize_t dev_show_model(struct device *dev,
540 struct device_attribute *attr,
541 char *buf)
542{
543 drive_info_struct *drv = to_drv(dev);
544 struct ctlr_info *h = to_hba(drv->dev.parent);
545 char model[MODEL_LEN + 1];
546 unsigned long flags;
547 int ret = 0;
548
549 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
550 if (h->busy_configuring)
551 ret = -EBUSY;
552 else
553 memcpy(model, drv->model, MODEL_LEN + 1);
554 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
555
556 if (ret)
557 return ret;
558 else
559 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
560}
8ba95c69 561static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP		 562
563static ssize_t dev_show_rev(struct device *dev,
564 struct device_attribute *attr,
565 char *buf)
566{
567 drive_info_struct *drv = to_drv(dev);
568 struct ctlr_info *h = to_hba(drv->dev.parent);
569 char rev[REV_LEN + 1];
570 unsigned long flags;
571 int ret = 0;
572
573 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
574 if (h->busy_configuring)
575 ret = -EBUSY;
576 else
577 memcpy(rev, drv->rev, REV_LEN + 1);
578 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
579
580 if (ret)
581 return ret;
582 else
583 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
584}
8ba95c69 585static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 586
ce84a8ae
SC		 587static ssize_t cciss_show_lunid(struct device *dev,
588 struct device_attribute *attr, char *buf)
589{
9cef0d2f
SC		 590 drive_info_struct *drv = to_drv(dev);
591 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 592 unsigned long flags;
593 unsigned char lunid[8];
594
595 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
596 if (h->busy_configuring) {
597 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
598 return -EBUSY;
599 }
600 if (!drv->heads) {
601 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
602 return -ENOTTY;
603 }
604 memcpy(lunid, drv->LunID, sizeof(lunid));
605 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
606 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
607 lunid[0], lunid[1], lunid[2], lunid[3],
608 lunid[4], lunid[5], lunid[6], lunid[7]);
609}
8ba95c69 610static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 611
3ff1111d
SC		 612static ssize_t cciss_show_raid_level(struct device *dev,
613 struct device_attribute *attr, char *buf)
614{
9cef0d2f
SC		 615 drive_info_struct *drv = to_drv(dev);
616 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 617 int raid;
618 unsigned long flags;
619
620 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
621 if (h->busy_configuring) {
622 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
623 return -EBUSY;
624 }
625 raid = drv->raid_level;
626 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
627 if (raid < 0 || raid > RAID_UNKNOWN)
628 raid = RAID_UNKNOWN;
629
630 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
631 raid_label[raid]);
632}
8ba95c69 633static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 634
e272afec
SC		 635static ssize_t cciss_show_usage_count(struct device *dev,
636 struct device_attribute *attr, char *buf)
637{
9cef0d2f
SC		 638 drive_info_struct *drv = to_drv(dev);
639 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 640 unsigned long flags;
641 int count;
642
643 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
644 if (h->busy_configuring) {
645 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
646 return -EBUSY;
647 }
648 count = drv->usage_count;
649 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
650 return snprintf(buf, 20, "%d\n", count);
651}
8ba95c69 652static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 653
d6f4965d
AP		 654static struct attribute *cciss_host_attrs[] = {
655 &dev_attr_rescan.attr,
656 NULL
657};
658
659static struct attribute_group cciss_host_attr_group = {
660 .attrs = cciss_host_attrs,
661};
662
9f792d9f 663static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP		 664 &cciss_host_attr_group,
665 NULL
666};
667
668static struct device_type cciss_host_type = {
669 .name = "cciss_host",
670 .groups = cciss_host_attr_groups,
617e1344 671 .release = cciss_hba_release,
d6f4965d
AP		 672};
673
7fe06326
AP		 674static struct attribute *cciss_dev_attrs[] = {
675 &dev_attr_unique_id.attr,
676 &dev_attr_model.attr,
677 &dev_attr_vendor.attr,
678 &dev_attr_rev.attr,
ce84a8ae 679 &dev_attr_lunid.attr,
3ff1111d 680 &dev_attr_raid_level.attr,
e272afec 681 &dev_attr_usage_count.attr,
7fe06326
AP		 682 NULL
683};
684
685static struct attribute_group cciss_dev_attr_group = {
686 .attrs = cciss_dev_attrs,
687};
688
a4dbd674 689static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 690 &cciss_dev_attr_group,
691 NULL
692};
693
694static struct device_type cciss_dev_type = {
695 .name = "cciss_device",
696 .groups = cciss_dev_attr_groups,
617e1344 697 .release = cciss_device_release,
7fe06326
AP		 698};
699
700static struct bus_type cciss_bus_type = {
701 .name = "cciss",
702};
703
617e1344
SC		 704/*
705 * cciss_hba_release is called when the reference count
706 * of h->dev goes to zero.
707 */
708static void cciss_hba_release(struct device *dev)
709{
710 /*
711 * nothing to do, but need this to avoid a warning
712 * about not having a release handler from lib/kref.c.
713 */
714}
7fe06326
AP		 715
716/*
717 * Initialize sysfs entry for each controller. This sets up and registers
718 * the 'cciss#' directory for each individual controller under
719 * /sys/bus/pci/devices/<dev>/.
720 */
721static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
722{
723 device_initialize(&h->dev);
724 h->dev.type = &cciss_host_type;
725 h->dev.bus = &cciss_bus_type;
726 dev_set_name(&h->dev, "%s", h->devname);
727 h->dev.parent = &h->pdev->dev;
728
729 return device_add(&h->dev);
730}
731
732/*
733 * Remove sysfs entries for an hba.
734 */
735static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
736{
737 device_del(&h->dev);
617e1344
SC		 738 put_device(&h->dev); /* final put. */
739}
740
741/* cciss_device_release is called when the reference count
9cef0d2f 742 * of h->drv[x]dev goes to zero.
617e1344
SC		 743 */
744static void cciss_device_release(struct device *dev)
745{
9cef0d2f
SC		 746 drive_info_struct *drv = to_drv(dev);
747 kfree(drv);
7fe06326
AP		 748}
749
750/*
751 * Initialize sysfs for each logical drive. This sets up and registers
752 * the 'c#d#' directory for each individual logical drive under
753 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
754 * /sys/block/cciss!c#d# to this entry.
755 */
617e1344 756static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 757 int drv_index)
758{
617e1344
SC		 759 struct device *dev;
760
9cef0d2f 761 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 762 return 0;
763
9cef0d2f 764 dev = &h->drv[drv_index]->dev;
617e1344
SC		 765 device_initialize(dev);
766 dev->type = &cciss_dev_type;
767 dev->bus = &cciss_bus_type;
768 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
769 dev->parent = &h->dev;
9cef0d2f 770 h->drv[drv_index]->device_initialized = 1;
617e1344 771 return device_add(dev);
7fe06326
AP		 772}
773
774/*
775 * Remove sysfs entries for a logical drive.
776 */
8ce51966
SC		 777static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
778 int ctlr_exiting)
7fe06326 779{
9cef0d2f 780 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 781
782 /* special case for c*d0, we only destroy it on controller exit */
783 if (drv_index == 0 && !ctlr_exiting)
784 return;
785
617e1344
SC		 786 device_del(dev);
787 put_device(dev); /* the "final" put. */
9cef0d2f 788 h->drv[drv_index] = NULL;
7fe06326
AP		 789}
790
7c832835
BH		 791/*
792 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 793 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 794 * which ones are free or in use. For operations that can wait for kmalloc
795 * to possible sleep, this routine can be called with get_from_pool set to 0.
796 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
797 */
798static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 799{
800 CommandList_struct *c;
7c832835 801 int i;
1da177e4
LT		 802 u64bit temp64;
803 dma_addr_t cmd_dma_handle, err_dma_handle;
804
7c832835
BH		 805 if (!get_from_pool) {
806 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
807 sizeof(CommandList_struct), &cmd_dma_handle);
808 if (c == NULL)
809 return NULL;
1da177e4
LT		 810 memset(c, 0, sizeof(CommandList_struct));
811
33079b21
MM		 812 c->cmdindex = -1;
813
7c832835
BH		 814 c->err_info = (ErrorInfo_struct *)
815 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
816 &err_dma_handle);
817
818 if (c->err_info == NULL) {
819 pci_free_consistent(h->pdev,
1da177e4
LT		 820 sizeof(CommandList_struct), c, cmd_dma_handle);
821 return NULL;
822 }
823 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 824 } else { /* get it out of the controllers pool */
825
826 do {
f880632f
MM		 827 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
828 if (i == h->nr_cmds)
7c832835
BH		 829 return NULL;
830 } while (test_and_set_bit
831 (i & (BITS_PER_LONG - 1),
832 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 833#ifdef CCISS_DEBUG
834 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
835#endif
7c832835 836 c = h->cmd_pool + i;
1da177e4 837 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 838 cmd_dma_handle = h->cmd_pool_dhandle
839 + i * sizeof(CommandList_struct);
1da177e4
LT		 840 c->err_info = h->errinfo_pool + i;
841 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 842 err_dma_handle = h->errinfo_pool_dhandle
843 + i * sizeof(ErrorInfo_struct);
844 h->nr_allocs++;
33079b21
MM		 845
846 c->cmdindex = i;
7c832835 847 }
1da177e4 848
8a3173de 849 INIT_HLIST_NODE(&c->list);
1da177e4 850 c->busaddr = (__u32) cmd_dma_handle;
7c832835 851 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 852 c->ErrDesc.Addr.lower = temp64.val32.lower;
853 c->ErrDesc.Addr.upper = temp64.val32.upper;
854 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 855
7c832835
BH		 856 c->ctlr = h->ctlr;
857 return c;
1da177e4
LT		 858}
859
7c832835
BH		 860/*
861 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 862 */
863static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
864{
865 int i;
866 u64bit temp64;
867
7c832835 868 if (!got_from_pool) {
1da177e4
LT		 869 temp64.val32.lower = c->ErrDesc.Addr.lower;
870 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 871 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
872 c->err_info, (dma_addr_t) temp64.val);
873 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
874 c, (dma_addr_t) c->busaddr);
875 } else {
1da177e4 876 i = c - h->cmd_pool;
7c832835
BH		 877 clear_bit(i & (BITS_PER_LONG - 1),
878 h->cmd_pool_bits + (i / BITS_PER_LONG));
879 h->nr_frees++;
880 }
1da177e4
LT		 881}
882
883static inline ctlr_info_t *get_host(struct gendisk *disk)
884{
7c832835 885 return disk->queue->queuedata;
1da177e4
LT		 886}
887
888static inline drive_info_struct *get_drv(struct gendisk *disk)
889{
890 return disk->private_data;
891}
892
893/*
894 * Open. Make sure the device is really there.
895 */
ef7822c2 896static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 897{
ef7822c2
AV		 898 ctlr_info_t *host = get_host(bdev->bd_disk);
899 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 900
901#ifdef CCISS_DEBUG
ef7822c2 902 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 903#endif /* CCISS_DEBUG */
1da177e4 904
2e043986 905 if (drv->busy_configuring)
ddd47442 906 return -EBUSY;
1da177e4
LT		 907 /*
908 * Root is allowed to open raw volume zero even if it's not configured
909 * so array config can still work. Root is also allowed to open any
910 * volume that has a LUN ID, so it can issue IOCTL to reread the
911 * disk information. I don't think I really like this
912 * but I'm already using way to many device nodes to claim another one
913 * for "raw controller".
914 */
7a06f789 915 if (drv->heads == 0) {
ef7822c2 916 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 917 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 918 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 919 return -ENXIO;
1da177e4 920 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 921 } else if (memcmp(drv->LunID, CTLR_LUNID,
922 sizeof(drv->LunID))) {
1da177e4
LT		 923 return -ENXIO;
924 }
925 }
926 if (!capable(CAP_SYS_ADMIN))
927 return -EPERM;
928 }
929 drv->usage_count++;
930 host->usage_count++;
931 return 0;
932}
7c832835 933
1da177e4
LT		 934/*
935 * Close. Sync first.
936 */
ef7822c2 937static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 938{
ef7822c2
AV		 939 ctlr_info_t *host = get_host(disk);
940 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 941
942#ifdef CCISS_DEBUG
ef7822c2 943 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 944#endif /* CCISS_DEBUG */
1da177e4
LT		 945
946 drv->usage_count--;
947 host->usage_count--;
948 return 0;
949}
950
951#ifdef CONFIG_COMPAT
952
ef7822c2
AV		 953static int do_ioctl(struct block_device *bdev, fmode_t mode,
954 unsigned cmd, unsigned long arg)
1da177e4
LT		 955{
956 int ret;
957 lock_kernel();
ef7822c2 958 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 959 unlock_kernel();
960 return ret;
961}
962
ef7822c2
AV		 963static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
964 unsigned cmd, unsigned long arg);
965static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
966 unsigned cmd, unsigned long arg);
1da177e4 967
ef7822c2
AV		 968static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
969 unsigned cmd, unsigned long arg)
1da177e4
LT		 970{
971 switch (cmd) {
972 case CCISS_GETPCIINFO:
973 case CCISS_GETINTINFO:
974 case CCISS_SETINTINFO:
975 case CCISS_GETNODENAME:
976 case CCISS_SETNODENAME:
977 case CCISS_GETHEARTBEAT:
978 case CCISS_GETBUSTYPES:
979 case CCISS_GETFIRMVER:
980 case CCISS_GETDRIVVER:
981 case CCISS_REVALIDVOLS:
982 case CCISS_DEREGDISK:
983 case CCISS_REGNEWDISK:
984 case CCISS_REGNEWD:
985 case CCISS_RESCANDISK:
986 case CCISS_GETLUNINFO:
ef7822c2 987 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 988
989 case CCISS_PASSTHRU32:
ef7822c2 990 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 991 case CCISS_BIG_PASSTHRU32:
ef7822c2 992 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 993
994 default:
995 return -ENOIOCTLCMD;
996 }
997}
998
ef7822c2
AV		 999static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1000 unsigned cmd, unsigned long arg)
1da177e4
LT		 1001{
1002 IOCTL32_Command_struct __user *arg32 =
7c832835 1003 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1004 IOCTL_Command_struct arg64;
1005 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1006 int err;
1007 u32 cp;
1008
1009 err = 0;
7c832835
BH		 1010 err |=
1011 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1012 sizeof(arg64.LUN_info));
1013 err |=
1014 copy_from_user(&arg64.Request, &arg32->Request,
1015 sizeof(arg64.Request));
1016 err |=
1017 copy_from_user(&arg64.error_info, &arg32->error_info,
1018 sizeof(arg64.error_info));
1da177e4
LT		 1019 err |= get_user(arg64.buf_size, &arg32->buf_size);
1020 err |= get_user(cp, &arg32->buf);
1021 arg64.buf = compat_ptr(cp);
1022 err |= copy_to_user(p, &arg64, sizeof(arg64));
1023
1024 if (err)
1025 return -EFAULT;
1026
ef7822c2 1027 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1028 if (err)
1029 return err;
7c832835
BH		 1030 err |=
1031 copy_in_user(&arg32->error_info, &p->error_info,
1032 sizeof(arg32->error_info));
1da177e4
LT		 1033 if (err)
1034 return -EFAULT;
1035 return err;
1036}
1037
ef7822c2
AV		 1038static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1039 unsigned cmd, unsigned long arg)
1da177e4
LT		 1040{
1041 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1042 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1043 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1044 BIG_IOCTL_Command_struct __user *p =
1045 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1046 int err;
1047 u32 cp;
1048
1049 err = 0;
7c832835
BH		 1050 err |=
1051 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1052 sizeof(arg64.LUN_info));
1053 err |=
1054 copy_from_user(&arg64.Request, &arg32->Request,
1055 sizeof(arg64.Request));
1056 err |=
1057 copy_from_user(&arg64.error_info, &arg32->error_info,
1058 sizeof(arg64.error_info));
1da177e4
LT		 1059 err |= get_user(arg64.buf_size, &arg32->buf_size);
1060 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1061 err |= get_user(cp, &arg32->buf);
1062 arg64.buf = compat_ptr(cp);
1063 err |= copy_to_user(p, &arg64, sizeof(arg64));
1064
1065 if (err)
7c832835 1066 return -EFAULT;
1da177e4 1067
ef7822c2 1068 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1069 if (err)
1070 return err;
7c832835
BH		 1071 err |=
1072 copy_in_user(&arg32->error_info, &p->error_info,
1073 sizeof(arg32->error_info));
1da177e4
LT		 1074 if (err)
1075 return -EFAULT;
1076 return err;
1077}
1078#endif
a885c8c4
CH		 1079
1080static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1081{
1082 drive_info_struct *drv = get_drv(bdev->bd_disk);
1083
1084 if (!drv->cylinders)
1085 return -ENXIO;
1086
1087 geo->heads = drv->heads;
1088 geo->sectors = drv->sectors;
1089 geo->cylinders = drv->cylinders;
1090 return 0;
1091}
1092
0a9279cc
MM		 1093static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1094{
1095 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1096 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1097 (void)check_for_unit_attention(host, c);
1098}
1da177e4 1099/*
7c832835 1100 * ioctl
1da177e4 1101 */
ef7822c2 1102static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1103 unsigned int cmd, unsigned long arg)
1da177e4 1104{
1da177e4
LT		 1105 struct gendisk *disk = bdev->bd_disk;
1106 ctlr_info_t *host = get_host(disk);
1107 drive_info_struct *drv = get_drv(disk);
1108 int ctlr = host->ctlr;
1109 void __user *argp = (void __user *)arg;
1110
1111#ifdef CCISS_DEBUG
1112 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1113#endif /* CCISS_DEBUG */
1114
1115 switch (cmd) {
1da177e4 1116 case CCISS_GETPCIINFO:
7c832835
BH		 1117 {
1118 cciss_pci_info_struct pciinfo;
1119
1120 if (!arg)
1121 return -EINVAL;
1122 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1123 pciinfo.bus = host->pdev->bus->number;
1124 pciinfo.dev_fn = host->pdev->devfn;
1125 pciinfo.board_id = host->board_id;
1126 if (copy_to_user
1127 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1128 return -EFAULT;
1129 return 0;
1130 }
1da177e4 1131 case CCISS_GETINTINFO:
7c832835
BH		 1132 {
1133 cciss_coalint_struct intinfo;
1134 if (!arg)
1135 return -EINVAL;
1136 intinfo.delay =
1137 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1138 intinfo.count =
1139 readl(&host->cfgtable->HostWrite.CoalIntCount);
1140 if (copy_to_user
1141 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1142 return -EFAULT;
1143 return 0;
1144 }
1da177e4 1145 case CCISS_SETINTINFO:
1da177e4 1146 {
7c832835
BH		 1147 cciss_coalint_struct intinfo;
1148 unsigned long flags;
1149 int i;
1150
1151 if (!arg)
1152 return -EINVAL;
1153 if (!capable(CAP_SYS_ADMIN))
1154 return -EPERM;
1155 if (copy_from_user
1156 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1157 return -EFAULT;
1158 if ((intinfo.delay == 0) && (intinfo.count == 0))
1159 {
1160// printk("cciss_ioctl: delay and count cannot be 0\n");
1161 return -EINVAL;
1162 }
1163 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1164 /* Update the field, and then ring the doorbell */
1165 writel(intinfo.delay,
1166 &(host->cfgtable->HostWrite.CoalIntDelay));
1167 writel(intinfo.count,
1168 &(host->cfgtable->HostWrite.CoalIntCount));
1169 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1170
1171 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1172 if (!(readl(host->vaddr + SA5_DOORBELL)
1173 & CFGTBL_ChangeReq))
1174 break;
1175 /* delay and try again */
1176 udelay(1000);
1177 }
1178 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1179 if (i >= MAX_IOCTL_CONFIG_WAIT)
1180 return -EAGAIN;
1181 return 0;
1da177e4 1182 }
1da177e4 1183 case CCISS_GETNODENAME:
7c832835
BH		 1184 {
1185 NodeName_type NodeName;
1186 int i;
1187
1188 if (!arg)
1189 return -EINVAL;
1190 for (i = 0; i < 16; i++)
1191 NodeName[i] =
1192 readb(&host->cfgtable->ServerName[i]);
1193 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1194 return -EFAULT;
1195 return 0;
1196 }
1da177e4 1197 case CCISS_SETNODENAME:
7c832835
BH		 1198 {
1199 NodeName_type NodeName;
1200 unsigned long flags;
1201 int i;
1202
1203 if (!arg)
1204 return -EINVAL;
1205 if (!capable(CAP_SYS_ADMIN))
1206 return -EPERM;
1207
1208 if (copy_from_user
1209 (NodeName, argp, sizeof(NodeName_type)))
1210 return -EFAULT;
1211
1212 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1213
1214 /* Update the field, and then ring the doorbell */
1215 for (i = 0; i < 16; i++)
1216 writeb(NodeName[i],
1217 &host->cfgtable->ServerName[i]);
1218
1219 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1220
1221 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1222 if (!(readl(host->vaddr + SA5_DOORBELL)
1223 & CFGTBL_ChangeReq))
1224 break;
1225 /* delay and try again */
1226 udelay(1000);
1227 }
1228 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1229 if (i >= MAX_IOCTL_CONFIG_WAIT)
1230 return -EAGAIN;
1231 return 0;
1232 }
1da177e4
LT		 1233
1234 case CCISS_GETHEARTBEAT:
7c832835
BH		 1235 {
1236 Heartbeat_type heartbeat;
1237
1238 if (!arg)
1239 return -EINVAL;
1240 heartbeat = readl(&host->cfgtable->HeartBeat);
1241 if (copy_to_user
1242 (argp, &heartbeat, sizeof(Heartbeat_type)))
1243 return -EFAULT;
1244 return 0;
1245 }
1da177e4 1246 case CCISS_GETBUSTYPES:
7c832835
BH		 1247 {
1248 BusTypes_type BusTypes;
1249
1250 if (!arg)
1251 return -EINVAL;
1252 BusTypes = readl(&host->cfgtable->BusTypes);
1253 if (copy_to_user
1254 (argp, &BusTypes, sizeof(BusTypes_type)))
1255 return -EFAULT;
1256 return 0;
1257 }
1da177e4 1258 case CCISS_GETFIRMVER:
7c832835
BH		 1259 {
1260 FirmwareVer_type firmware;
1da177e4 1261
7c832835
BH		 1262 if (!arg)
1263 return -EINVAL;
1264 memcpy(firmware, host->firm_ver, 4);
1da177e4 1265
7c832835
BH		 1266 if (copy_to_user
1267 (argp, firmware, sizeof(FirmwareVer_type)))
1268 return -EFAULT;
1269 return 0;
1270 }
1271 case CCISS_GETDRIVVER:
1272 {
1273 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1274
7c832835
BH		 1275 if (!arg)
1276 return -EINVAL;
1da177e4 1277
7c832835
BH		 1278 if (copy_to_user
1279 (argp, &DriverVer, sizeof(DriverVer_type)))
1280 return -EFAULT;
1281 return 0;
1282 }
1da177e4 1283
6ae5ce8e
MM		 1284 case CCISS_DEREGDISK:
1285 case CCISS_REGNEWD:
1da177e4 1286 case CCISS_REVALIDVOLS:
2d11d993 1287 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1288
1289 case CCISS_GETLUNINFO:{
1290 LogvolInfo_struct luninfo;
1291
39ccf9a6
SC		 1292 memcpy(&luninfo.LunID, drv->LunID,
1293 sizeof(luninfo.LunID));
7c832835
BH		 1294 luninfo.num_opens = drv->usage_count;
1295 luninfo.num_parts = 0;
1296 if (copy_to_user(argp, &luninfo,
1297 sizeof(LogvolInfo_struct)))
1298 return -EFAULT;
1299 return 0;
1300 }
1da177e4 1301 case CCISS_PASSTHRU:
1da177e4 1302 {
7c832835
BH		 1303 IOCTL_Command_struct iocommand;
1304 CommandList_struct *c;
1305 char *buff = NULL;
1306 u64bit temp64;
1307 unsigned long flags;
6e9a4738 1308 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1309
7c832835
BH		 1310 if (!arg)
1311 return -EINVAL;
1da177e4 1312
7c832835
BH		 1313 if (!capable(CAP_SYS_RAWIO))
1314 return -EPERM;
1da177e4 1315
7c832835
BH		 1316 if (copy_from_user
1317 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1318 return -EFAULT;
1319 if ((iocommand.buf_size < 1) &&
1320 (iocommand.Request.Type.Direction != XFER_NONE)) {
1321 return -EINVAL;
1322 }
1323#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1324 /* Check kmalloc limits */
1325 if (iocommand.buf_size > 128000)
1326 return -EINVAL;
1327#endif
1328 if (iocommand.buf_size > 0) {
1329 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1330 if (buff == NULL)
1331 return -EFAULT;
1332 }
1333 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1334 /* Copy the data into the buffer we created */
1335 if (copy_from_user
1336 (buff, iocommand.buf, iocommand.buf_size)) {
1337 kfree(buff);
1338 return -EFAULT;
1339 }
1340 } else {
1341 memset(buff, 0, iocommand.buf_size);
1342 }
1343 if ((c = cmd_alloc(host, 0)) == NULL) {
1344 kfree(buff);
1345 return -ENOMEM;
1346 }
b028461d 1347 /* Fill in the command type */
7c832835 1348 c->cmd_type = CMD_IOCTL_PEND;
b028461d 1349 /* Fill in Command Header */
1350 c->Header.ReplyQueue = 0; /* unused in simple mode */
1351 if (iocommand.buf_size > 0) /* buffer to fill */
7c832835
BH		 1352 {
1353 c->Header.SGList = 1;
1354 c->Header.SGTotal = 1;
b028461d 1355 } else /* no buffers to fill */
7c832835
BH		 1356 {
1357 c->Header.SGList = 0;
1358 c->Header.SGTotal = 0;
1359 }
1360 c->Header.LUN = iocommand.LUN_info;
b028461d 1361 /* use the kernel address the cmd block for tag */
1362 c->Header.Tag.lower = c->busaddr;
1da177e4 1363
b028461d 1364 /* Fill in Request block */
7c832835 1365 c->Request = iocommand.Request;
1da177e4 1366
b028461d 1367 /* Fill in the scatter gather information */
7c832835
BH		 1368 if (iocommand.buf_size > 0) {
1369 temp64.val = pci_map_single(host->pdev, buff,
1370 iocommand.buf_size,
1371 PCI_DMA_BIDIRECTIONAL);
1372 c->SG[0].Addr.lower = temp64.val32.lower;
1373 c->SG[0].Addr.upper = temp64.val32.upper;
1374 c->SG[0].Len = iocommand.buf_size;
b028461d 1375 c->SG[0].Ext = 0; /* we are not chaining */
7c832835
BH		 1376 }
1377 c->waiting = &wait;
1378
1379 /* Put the request on the tail of the request queue */
1380 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1381 addQ(&host->reqQ, c);
1382 host->Qdepth++;
1383 start_io(host);
1384 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1385
1386 wait_for_completion(&wait);
1387
1388 /* unlock the buffers from DMA */
1389 temp64.val32.lower = c->SG[0].Addr.lower;
1390 temp64.val32.upper = c->SG[0].Addr.upper;
1391 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1392 iocommand.buf_size,
1393 PCI_DMA_BIDIRECTIONAL);
1394
0a9279cc
MM		 1395 check_ioctl_unit_attention(host, c);
1396
7c832835
BH		 1397 /* Copy the error information out */
1398 iocommand.error_info = *(c->err_info);
1399 if (copy_to_user
1400 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1401 kfree(buff);
1da177e4
LT		 1402 cmd_free(host, c, 0);
1403 return -EFAULT;
1404 }
7c832835
BH		 1405
1406 if (iocommand.Request.Type.Direction == XFER_READ) {
1407 /* Copy the data out of the buffer we created */
1408 if (copy_to_user
1409 (iocommand.buf, buff, iocommand.buf_size)) {
1410 kfree(buff);
1411 cmd_free(host, c, 0);
1412 return -EFAULT;
1413 }
1414 }
1415 kfree(buff);
1416 cmd_free(host, c, 0);
1417 return 0;
1da177e4 1418 }
7c832835
BH		 1419 case CCISS_BIG_PASSTHRU:{
1420 BIG_IOCTL_Command_struct *ioc;
1421 CommandList_struct *c;
1422 unsigned char **buff = NULL;
1423 int *buff_size = NULL;
1424 u64bit temp64;
1425 unsigned long flags;
1426 BYTE sg_used = 0;
1427 int status = 0;
1428 int i;
6e9a4738 1429 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1430 __u32 left;
1431 __u32 sz;
1432 BYTE __user *data_ptr;
1433
1434 if (!arg)
1435 return -EINVAL;
1436 if (!capable(CAP_SYS_RAWIO))
1437 return -EPERM;
1438 ioc = (BIG_IOCTL_Command_struct *)
1439 kmalloc(sizeof(*ioc), GFP_KERNEL);
1440 if (!ioc) {
1441 status = -ENOMEM;
1442 goto cleanup1;
1443 }
1444 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1445 status = -EFAULT;
1446 goto cleanup1;
1447 }
1448 if ((ioc->buf_size < 1) &&
1449 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1450 status = -EINVAL;
1451 goto cleanup1;
7c832835
BH		 1452 }
1453 /* Check kmalloc limits using all SGs */
1454 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1455 status = -EINVAL;
1456 goto cleanup1;
1457 }
1458 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1459 status = -EINVAL;
1460 goto cleanup1;
1461 }
1462 buff =
1463 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1464 if (!buff) {
1da177e4
LT		 1465 status = -ENOMEM;
1466 goto cleanup1;
1467 }
5cbded58 1468 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1469 GFP_KERNEL);
1470 if (!buff_size) {
1471 status = -ENOMEM;
1472 goto cleanup1;
1473 }
1474 left = ioc->buf_size;
1475 data_ptr = ioc->buf;
1476 while (left) {
1477 sz = (left >
1478 ioc->malloc_size) ? ioc->
1479 malloc_size : left;
1480 buff_size[sg_used] = sz;
1481 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1482 if (buff[sg_used] == NULL) {
1da177e4 1483 status = -ENOMEM;
15534d38
JA		 1484 goto cleanup1;
1485 }
7c832835
BH		 1486 if (ioc->Request.Type.Direction == XFER_WRITE) {
1487 if (copy_from_user
1488 (buff[sg_used], data_ptr, sz)) {
f7108f91 1489 status = -EFAULT;
7c832835
BH		 1490 goto cleanup1;
1491 }
1492 } else {
1493 memset(buff[sg_used], 0, sz);
1494 }
1495 left -= sz;
1496 data_ptr += sz;
1497 sg_used++;
1498 }
1499 if ((c = cmd_alloc(host, 0)) == NULL) {
1500 status = -ENOMEM;
1501 goto cleanup1;
1502 }
1503 c->cmd_type = CMD_IOCTL_PEND;
1504 c->Header.ReplyQueue = 0;
1505
1506 if (ioc->buf_size > 0) {
1507 c->Header.SGList = sg_used;
1508 c->Header.SGTotal = sg_used;
1da177e4 1509 } else {
7c832835
BH		 1510 c->Header.SGList = 0;
1511 c->Header.SGTotal = 0;
1da177e4 1512 }
7c832835
BH		 1513 c->Header.LUN = ioc->LUN_info;
1514 c->Header.Tag.lower = c->busaddr;
1515
1516 c->Request = ioc->Request;
1517 if (ioc->buf_size > 0) {
1518 int i;
1519 for (i = 0; i < sg_used; i++) {
1520 temp64.val =
1521 pci_map_single(host->pdev, buff[i],
1522 buff_size[i],
1523 PCI_DMA_BIDIRECTIONAL);
1524 c->SG[i].Addr.lower =
1525 temp64.val32.lower;
1526 c->SG[i].Addr.upper =
1527 temp64.val32.upper;
1528 c->SG[i].Len = buff_size[i];
1529 c->SG[i].Ext = 0; /* we are not chaining */
1530 }
1531 }
1532 c->waiting = &wait;
1533 /* Put the request on the tail of the request queue */
1534 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1535 addQ(&host->reqQ, c);
1536 host->Qdepth++;
1537 start_io(host);
1538 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1539 wait_for_completion(&wait);
1540 /* unlock the buffers from DMA */
1541 for (i = 0; i < sg_used; i++) {
1542 temp64.val32.lower = c->SG[i].Addr.lower;
1543 temp64.val32.upper = c->SG[i].Addr.upper;
1544 pci_unmap_single(host->pdev,
1545 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1546 PCI_DMA_BIDIRECTIONAL);
1da177e4 1547 }
0a9279cc 1548 check_ioctl_unit_attention(host, c);
7c832835
BH		 1549 /* Copy the error information out */
1550 ioc->error_info = *(c->err_info);
1551 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1552 cmd_free(host, c, 0);
1553 status = -EFAULT;
1554 goto cleanup1;
1555 }
1556 if (ioc->Request.Type.Direction == XFER_READ) {
1557 /* Copy the data out of the buffer we created */
1558 BYTE __user *ptr = ioc->buf;
1559 for (i = 0; i < sg_used; i++) {
1560 if (copy_to_user
1561 (ptr, buff[i], buff_size[i])) {
1562 cmd_free(host, c, 0);
1563 status = -EFAULT;
1564 goto cleanup1;
1565 }
1566 ptr += buff_size[i];
1da177e4 1567 }
1da177e4 1568 }
7c832835
BH		 1569 cmd_free(host, c, 0);
1570 status = 0;
1571 cleanup1:
1572 if (buff) {
1573 for (i = 0; i < sg_used; i++)
1574 kfree(buff[i]);
1575 kfree(buff);
1576 }
1577 kfree(buff_size);
1578 kfree(ioc);
1579 return status;
1da177e4 1580 }
03bbfee5
MMOD		 1581
1582 /* scsi_cmd_ioctl handles these, below, though some are not */
1583 /* very meaningful for cciss. SG_IO is the main one people want. */
1584
1585 case SG_GET_VERSION_NUM:
1586 case SG_SET_TIMEOUT:
1587 case SG_GET_TIMEOUT:
1588 case SG_GET_RESERVED_SIZE:
1589 case SG_SET_RESERVED_SIZE:
1590 case SG_EMULATED_HOST:
1591 case SG_IO:
1592 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1593 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1594
1595 /* scsi_cmd_ioctl would normally handle these, below, but */
1596 /* they aren't a good fit for cciss, as CD-ROMs are */
1597 /* not supported, and we don't have any bus/target/lun */
1598 /* which we present to the kernel. */
1599
1600 case CDROM_SEND_PACKET:
1601 case CDROMCLOSETRAY:
1602 case CDROMEJECT:
1603 case SCSI_IOCTL_GET_IDLUN:
1604 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1605 default:
1606 return -ENOTTY;
1607 }
1da177e4
LT		 1608}
1609
7b30f092
JA		 1610static void cciss_check_queues(ctlr_info_t *h)
1611{
1612 int start_queue = h->next_to_run;
1613 int i;
1614
1615 /* check to see if we have maxed out the number of commands that can
1616 * be placed on the queue. If so then exit. We do this check here
1617 * in case the interrupt we serviced was from an ioctl and did not
1618 * free any new commands.
1619 */
f880632f 1620 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1621 return;
1622
1623 /* We have room on the queue for more commands. Now we need to queue
1624 * them up. We will also keep track of the next queue to run so
1625 * that every queue gets a chance to be started first.
1626 */
1627 for (i = 0; i < h->highest_lun + 1; i++) {
1628 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1629 /* make sure the disk has been added and the drive is real
1630 * because this can be called from the middle of init_one.
1631 */
9cef0d2f
SC		 1632 if (!h->drv[curr_queue])
1633 continue;
1634 if (!(h->drv[curr_queue]->queue) ||
1635 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1636 continue;
1637 blk_start_queue(h->gendisk[curr_queue]->queue);
1638
1639 /* check to see if we have maxed out the number of commands
1640 * that can be placed on the queue.
1641 */
f880632f 1642 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1643 if (curr_queue == start_queue) {
1644 h->next_to_run =
1645 (start_queue + 1) % (h->highest_lun + 1);
1646 break;
1647 } else {
1648 h->next_to_run = curr_queue;
1649 break;
1650 }
7b30f092
JA		 1651 }
1652 }
1653}
1654
ca1e0484
MM		 1655static void cciss_softirq_done(struct request *rq)
1656{
1657 CommandList_struct *cmd = rq->completion_data;
1658 ctlr_info_t *h = hba[cmd->ctlr];
5c07a311 1659 SGDescriptor_struct *curr_sg = cmd->SG;
ca1e0484
MM		 1660 unsigned long flags;
1661 u64bit temp64;
1662 int i, ddir;
5c07a311 1663 int sg_index = 0;
ca1e0484
MM		 1664
1665 if (cmd->Request.Type.Direction == XFER_READ)
1666 ddir = PCI_DMA_FROMDEVICE;
1667 else
1668 ddir = PCI_DMA_TODEVICE;
1669
1670 /* command did not need to be retried */
1671 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1672 for (i = 0; i < cmd->Header.SGList; i++) {
5c07a311
DB		 1673 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
1674 temp64.val32.lower = cmd->SG[i].Addr.lower;
1675 temp64.val32.upper = cmd->SG[i].Addr.upper;
1676 pci_dma_sync_single_for_cpu(h->pdev, temp64.val,
1677 cmd->SG[i].Len, ddir);
1678 pci_unmap_single(h->pdev, temp64.val,
1679 cmd->SG[i].Len, ddir);
1680 /* Point to the next block */
1681 curr_sg = h->cmd_sg_list[cmd->cmdindex]->sgchain;
1682 sg_index = 0;
1683 }
1684 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1685 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1686 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1687 ddir);
1688 ++sg_index;
ca1e0484
MM		 1689 }
1690
ca1e0484
MM		 1691#ifdef CCISS_DEBUG
1692 printk("Done with %p\n", rq);
7c832835 1693#endif /* CCISS_DEBUG */
ca1e0484 1694
c3a4d78c 1695 /* set the residual count for pc requests */
ac44e5b2 1696 if (blk_pc_request(rq))
c3a4d78c 1697 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1698
c3a4d78c 1699 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1700
ca1e0484 1701 spin_lock_irqsave(&h->lock, flags);
7c832835 1702 cmd_free(h, cmd, 1);
7b30f092 1703 cciss_check_queues(h);
ca1e0484
MM		 1704 spin_unlock_irqrestore(&h->lock, flags);
1705}
1706
39ccf9a6
SC		 1707static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1708 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1709{
9cef0d2f
SC		 1710 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1711 sizeof(h->drv[log_unit]->LunID));
b57695fe 1712}
1713
7fe06326
AP		 1714/* This function gets the SCSI vendor, model, and revision of a logical drive
1715 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1716 * they cannot be read.
1717 */
7b838bde 1718static void cciss_get_device_descr(int ctlr, int logvol,
7fe06326
AP		 1719 char *vendor, char *model, char *rev)
1720{
1721 int rc;
1722 InquiryData_struct *inq_buf;
b57695fe 1723 unsigned char scsi3addr[8];
7fe06326
AP		 1724
1725 *vendor = '\0';
1726 *model = '\0';
1727 *rev = '\0';
1728
1729 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1730 if (!inq_buf)
1731 return;
1732
b57695fe 1733 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1734 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1735 scsi3addr, TYPE_CMD);
7fe06326
AP		 1736 if (rc == IO_OK) {
1737 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1738 vendor[VENDOR_LEN] = '\0';
1739 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1740 model[MODEL_LEN] = '\0';
1741 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1742 rev[REV_LEN] = '\0';
1743 }
1744
1745 kfree(inq_buf);
1746 return;
1747}
1748
a72da29b
MM		 1749/* This function gets the serial number of a logical drive via
1750 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1751 * number cannot be had, for whatever reason, 16 bytes of 0xff
1752 * are returned instead.
1753 */
7b838bde 1754static void cciss_get_serial_no(int ctlr, int logvol,
a72da29b
MM		 1755 unsigned char *serial_no, int buflen)
1756{
1757#define PAGE_83_INQ_BYTES 64
1758 int rc;
1759 unsigned char *buf;
b57695fe 1760 unsigned char scsi3addr[8];
a72da29b
MM		 1761
1762 if (buflen > 16)
1763 buflen = 16;
1764 memset(serial_no, 0xff, buflen);
1765 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1766 if (!buf)
1767 return;
1768 memset(serial_no, 0, buflen);
b57695fe 1769 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1770 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1771 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1772 if (rc == IO_OK)
1773 memcpy(serial_no, &buf[8], buflen);
1774 kfree(buf);
1775 return;
1776}
1777
617e1344
SC		 1778/*
1779 * cciss_add_disk sets up the block device queue for a logical drive
1780 */
1781static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1782 int drv_index)
1783{
1784 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1785 if (!disk->queue)
1786 goto init_queue_failure;
6ae5ce8e
MM		 1787 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1788 disk->major = h->major;
1789 disk->first_minor = drv_index << NWD_SHIFT;
1790 disk->fops = &cciss_fops;
9cef0d2f
SC		 1791 if (cciss_create_ld_sysfs_entry(h, drv_index))
1792 goto cleanup_queue;
1793 disk->private_data = h->drv[drv_index];
1794 disk->driverfs_dev = &h->drv[drv_index]->dev;
6ae5ce8e
MM		 1795
1796 /* Set up queue information */
1797 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1798
1799 /* This is a hardware imposed limit. */
8a78362c 1800 blk_queue_max_segments(disk->queue, h->maxsgentries);
6ae5ce8e 1801
086fa5ff 1802 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
6ae5ce8e
MM		 1803
1804 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1805
1806 disk->queue->queuedata = h;
1807
e1defc4f 1808 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1809 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1810
1811 /* Make sure all queue data is written out before */
9cef0d2f 1812 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1813 /* allows the interrupt handler to start the queue */
1814 wmb();
9cef0d2f 1815 h->drv[drv_index]->queue = disk->queue;
6ae5ce8e 1816 add_disk(disk);
617e1344
SC		 1817 return 0;
1818
1819cleanup_queue:
1820 blk_cleanup_queue(disk->queue);
1821 disk->queue = NULL;
e8074f79 1822init_queue_failure:
617e1344 1823 return -1;
6ae5ce8e
MM		 1824}
1825
ddd47442 1826/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1827 * If the usage_count is zero and it is a heretofore unknown drive, or,
1828 * the drive's capacity, geometry, or serial number has changed,
1829 * then the drive information will be updated and the disk will be
1830 * re-registered with the kernel. If these conditions don't hold,
1831 * then it will be left alone for the next reboot. The exception to this
1832 * is disk 0 which will always be left registered with the kernel since it
1833 * is also the controller node. Any changes to disk 0 will show up on
1834 * the next reboot.
7c832835 1835 */
2d11d993
SC		 1836static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1837 int via_ioctl)
7c832835 1838{
ddd47442
MM		 1839 ctlr_info_t *h = hba[ctlr];
1840 struct gendisk *disk;
ddd47442
MM		 1841 InquiryData_struct *inq_buff = NULL;
1842 unsigned int block_size;
00988a35 1843 sector_t total_size;
ddd47442
MM		 1844 unsigned long flags = 0;
1845 int ret = 0;
a72da29b
MM		 1846 drive_info_struct *drvinfo;
1847
1848 /* Get information about the disk and modify the driver structure */
1849 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1850 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 1851 if (inq_buff == NULL || drvinfo == NULL)
1852 goto mem_msg;
1853
1854 /* testing to see if 16-byte CDBs are already being used */
1855 if (h->cciss_read == CCISS_READ_16) {
7b838bde 1856 cciss_read_capacity_16(h->ctlr, drv_index,
a72da29b
MM		 1857 &total_size, &block_size);
1858
1859 } else {
7b838bde 1860 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
a72da29b
MM		 1861 /* if read_capacity returns all F's this volume is >2TB */
1862 /* in size so we switch to 16-byte CDB's for all */
1863 /* read/write ops */
1864 if (total_size == 0xFFFFFFFFULL) {
7b838bde 1865 cciss_read_capacity_16(ctlr, drv_index,
a72da29b
MM		 1866 &total_size, &block_size);
1867 h->cciss_read = CCISS_READ_16;
1868 h->cciss_write = CCISS_WRITE_16;
1869 } else {
1870 h->cciss_read = CCISS_READ_10;
1871 h->cciss_write = CCISS_WRITE_10;
1872 }
1873 }
1874
7b838bde 1875 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
a72da29b
MM		 1876 inq_buff, drvinfo);
1877 drvinfo->block_size = block_size;
1878 drvinfo->nr_blocks = total_size + 1;
1879
7b838bde 1880 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
7fe06326 1881 drvinfo->model, drvinfo->rev);
7b838bde 1882 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
a72da29b 1883 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 1884 /* Save the lunid in case we deregister the disk, below. */
1885 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1886 sizeof(drvinfo->LunID));
a72da29b
MM		 1887
1888 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 1889 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 1890 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 1891 h->drv[drv_index]->serial_no, 16) == 0) &&
1892 drvinfo->block_size == h->drv[drv_index]->block_size &&
1893 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1894 drvinfo->heads == h->drv[drv_index]->heads &&
1895 drvinfo->sectors == h->drv[drv_index]->sectors &&
1896 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 1897 /* The disk is unchanged, nothing to update */
1898 goto freeret;
a72da29b 1899
6ae5ce8e
MM		 1900 /* If we get here it's not the same disk, or something's changed,
1901 * so we need to * deregister it, and re-register it, if it's not
1902 * in use.
1903 * If the disk already exists then deregister it before proceeding
1904 * (unless it's the first disk (for the controller node).
1905 */
9cef0d2f 1906 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 1907 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442 1908 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 1909 h->drv[drv_index]->busy_configuring = 1;
ddd47442 1910 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1911
9cef0d2f 1912 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 1913 * which keeps the interrupt handler from starting
1914 * the queue.
1915 */
2d11d993 1916 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1917 }
1918
1919 /* If the disk is in use return */
1920 if (ret)
a72da29b
MM		 1921 goto freeret;
1922
6ae5ce8e 1923 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 1924 * and serial number inquiry. If the disk was deregistered
1925 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 1926 */
9cef0d2f
SC		 1927 if (h->drv[drv_index] == NULL) {
1928 drvinfo->device_initialized = 0;
1929 h->drv[drv_index] = drvinfo;
1930 drvinfo = NULL; /* so it won't be freed below. */
1931 } else {
1932 /* special case for cxd0 */
1933 h->drv[drv_index]->block_size = drvinfo->block_size;
1934 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
1935 h->drv[drv_index]->heads = drvinfo->heads;
1936 h->drv[drv_index]->sectors = drvinfo->sectors;
1937 h->drv[drv_index]->cylinders = drvinfo->cylinders;
1938 h->drv[drv_index]->raid_level = drvinfo->raid_level;
1939 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
1940 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
1941 VENDOR_LEN + 1);
1942 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
1943 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
1944 }
ddd47442
MM		 1945
1946 ++h->num_luns;
1947 disk = h->gendisk[drv_index];
9cef0d2f 1948 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 1949
6ae5ce8e
MM		 1950 /* If it's not disk 0 (drv_index != 0)
1951 * or if it was disk 0, but there was previously
1952 * no actual corresponding configured logical drive
1953 * (raid_leve == -1) then we want to update the
1954 * logical drive's information.
1955 */
361e9b07
SC		 1956 if (drv_index || first_time) {
1957 if (cciss_add_disk(h, disk, drv_index) != 0) {
1958 cciss_free_gendisk(h, drv_index);
9cef0d2f 1959 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 1960 printk(KERN_WARNING "cciss:%d could not update "
1961 "disk %d\n", h->ctlr, drv_index);
1962 --h->num_luns;
1963 }
1964 }
ddd47442 1965
6ae5ce8e 1966freeret:
ddd47442 1967 kfree(inq_buff);
a72da29b 1968 kfree(drvinfo);
ddd47442 1969 return;
6ae5ce8e 1970mem_msg:
ddd47442
MM		 1971 printk(KERN_ERR "cciss: out of memory\n");
1972 goto freeret;
1973}
1974
1975/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 1976 * that has a null drv pointer and allocate the drive info struct and
1977 * will return that index This is where new drives will be added.
1978 * If the index to be returned is greater than the highest_lun index for
1979 * the controller then highest_lun is set * to this new index.
1980 * If there are no available indexes or if tha allocation fails, then -1
1981 * is returned. * "controller_node" is used to know if this is a real
1982 * logical drive, or just the controller node, which determines if this
1983 * counts towards highest_lun.
7c832835 1984 */
9cef0d2f 1985static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 1986{
1987 int i;
9cef0d2f 1988 drive_info_struct *drv;
ddd47442 1989
9cef0d2f 1990 /* Search for an empty slot for our drive info */
7c832835 1991 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 1992
1993 /* if not cxd0 case, and it's occupied, skip it. */
1994 if (h->drv[i] && i != 0)
1995 continue;
1996 /*
1997 * If it's cxd0 case, and drv is alloc'ed already, and a
1998 * disk is configured there, skip it.
1999 */
2000 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2001 continue;
2002
2003 /*
2004 * We've found an empty slot. Update highest_lun
2005 * provided this isn't just the fake cxd0 controller node.
2006 */
2007 if (i > h->highest_lun && !controller_node)
2008 h->highest_lun = i;
2009
2010 /* If adding a real disk at cxd0, and it's already alloc'ed */
2011 if (i == 0 && h->drv[i] != NULL)
ddd47442 2012 return i;
9cef0d2f
SC		 2013
2014 /*
2015 * Found an empty slot, not already alloc'ed. Allocate it.
2016 * Mark it with raid_level == -1, so we know it's new later on.
2017 */
2018 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2019 if (!drv)
2020 return -1;
2021 drv->raid_level = -1; /* so we know it's new */
2022 h->drv[i] = drv;
2023 return i;
ddd47442
MM		 2024 }
2025 return -1;
2026}
2027
9cef0d2f
SC		 2028static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2029{
2030 kfree(h->drv[drv_index]);
2031 h->drv[drv_index] = NULL;
2032}
2033
361e9b07
SC		 2034static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2035{
2036 put_disk(h->gendisk[drv_index]);
2037 h->gendisk[drv_index] = NULL;
2038}
2039
6ae5ce8e
MM		 2040/* cciss_add_gendisk finds a free hba[]->drv structure
2041 * and allocates a gendisk if needed, and sets the lunid
2042 * in the drvinfo structure. It returns the index into
2043 * the ->drv[] array, or -1 if none are free.
2044 * is_controller_node indicates whether highest_lun should
2045 * count this disk, or if it's only being added to provide
2046 * a means to talk to the controller in case no logical
2047 * drives have yet been configured.
2048 */
39ccf9a6
SC		 2049static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2050 int controller_node)
6ae5ce8e
MM		 2051{
2052 int drv_index;
2053
9cef0d2f 2054 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2055 if (drv_index == -1)
2056 return -1;
8ce51966 2057
6ae5ce8e
MM		 2058 /*Check if the gendisk needs to be allocated */
2059 if (!h->gendisk[drv_index]) {
2060 h->gendisk[drv_index] =
2061 alloc_disk(1 << NWD_SHIFT);
2062 if (!h->gendisk[drv_index]) {
2063 printk(KERN_ERR "cciss%d: could not "
2064 "allocate a new disk %d\n",
2065 h->ctlr, drv_index);
9cef0d2f 2066 goto err_free_drive_info;
6ae5ce8e
MM		 2067 }
2068 }
9cef0d2f
SC		 2069 memcpy(h->drv[drv_index]->LunID, lunid,
2070 sizeof(h->drv[drv_index]->LunID));
2071 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2072 goto err_free_disk;
6ae5ce8e
MM		 2073 /* Don't need to mark this busy because nobody */
2074 /* else knows about this disk yet to contend */
2075 /* for access to it. */
9cef0d2f 2076 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2077 wmb();
2078 return drv_index;
7fe06326
AP		 2079
2080err_free_disk:
361e9b07 2081 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2082err_free_drive_info:
2083 cciss_free_drive_info(h, drv_index);
7fe06326 2084 return -1;
6ae5ce8e
MM		 2085}
2086
2087/* This is for the special case of a controller which
2088 * has no logical drives. In this case, we still need
2089 * to register a disk so the controller can be accessed
2090 * by the Array Config Utility.
2091 */
2092static void cciss_add_controller_node(ctlr_info_t *h)
2093{
2094 struct gendisk *disk;
2095 int drv_index;
2096
2097 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2098 return;
2099
39ccf9a6 2100 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2101 if (drv_index == -1)
2102 goto error;
9cef0d2f
SC		 2103 h->drv[drv_index]->block_size = 512;
2104 h->drv[drv_index]->nr_blocks = 0;
2105 h->drv[drv_index]->heads = 0;
2106 h->drv[drv_index]->sectors = 0;
2107 h->drv[drv_index]->cylinders = 0;
2108 h->drv[drv_index]->raid_level = -1;
2109 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2110 disk = h->gendisk[drv_index];
361e9b07
SC		 2111 if (cciss_add_disk(h, disk, drv_index) == 0)
2112 return;
2113 cciss_free_gendisk(h, drv_index);
9cef0d2f 2114 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2115error:
2116 printk(KERN_WARNING "cciss%d: could not "
2117 "add disk 0.\n", h->ctlr);
2118 return;
6ae5ce8e
MM		 2119}
2120
ddd47442 2121/* This function will add and remove logical drives from the Logical
d14c4ab5 2122 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2123 * so that mount points are preserved until the next reboot. This allows
2124 * for the removal of logical drives in the middle of the drive array
2125 * without a re-ordering of those drives.
2126 * INPUT
2127 * h = The controller to perform the operations on
7c832835 2128 */
2d11d993
SC		 2129static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2130 int via_ioctl)
1da177e4 2131{
ddd47442
MM		 2132 int ctlr = h->ctlr;
2133 int num_luns;
2134 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2135 int return_code;
2136 int listlength = 0;
2137 int i;
2138 int drv_found;
2139 int drv_index = 0;
39ccf9a6 2140 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2141 unsigned long flags;
ddd47442 2142
6ae5ce8e
MM		 2143 if (!capable(CAP_SYS_RAWIO))
2144 return -EPERM;
2145
ddd47442
MM		 2146 /* Set busy_configuring flag for this operation */
2147 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2148 if (h->busy_configuring) {
ddd47442
MM		 2149 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2150 return -EBUSY;
2151 }
2152 h->busy_configuring = 1;
a72da29b 2153 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2154
a72da29b
MM		 2155 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2156 if (ld_buff == NULL)
2157 goto mem_msg;
2158
2159 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2160 sizeof(ReportLunData_struct),
2161 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2162
a72da29b
MM		 2163 if (return_code == IO_OK)
2164 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2165 else { /* reading number of logical volumes failed */
2166 printk(KERN_WARNING "cciss: report logical volume"
2167 " command failed\n");
2168 listlength = 0;
2169 goto freeret;
2170 }
2171
2172 num_luns = listlength / 8; /* 8 bytes per entry */
2173 if (num_luns > CISS_MAX_LUN) {
2174 num_luns = CISS_MAX_LUN;
2175 printk(KERN_WARNING "cciss: more luns configured"
2176 " on controller than can be handled by"
2177 " this driver.\n");
2178 }
2179
6ae5ce8e
MM		 2180 if (num_luns == 0)
2181 cciss_add_controller_node(h);
2182
2183 /* Compare controller drive array to driver's drive array
2184 * to see if any drives are missing on the controller due
2185 * to action of Array Config Utility (user deletes drive)
2186 * and deregister logical drives which have disappeared.
2187 */
a72da29b
MM		 2188 for (i = 0; i <= h->highest_lun; i++) {
2189 int j;
2190 drv_found = 0;
d8a0be6a
SC		 2191
2192 /* skip holes in the array from already deleted drives */
9cef0d2f 2193 if (h->drv[i] == NULL)
d8a0be6a
SC		 2194 continue;
2195
a72da29b 2196 for (j = 0; j < num_luns; j++) {
39ccf9a6 2197 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2198 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2199 sizeof(lunid)) == 0) {
a72da29b
MM		 2200 drv_found = 1;
2201 break;
2202 }
2203 }
2204 if (!drv_found) {
2205 /* Deregister it from the OS, it's gone. */
2206 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2207 h->drv[i]->busy_configuring = 1;
a72da29b 2208 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2209 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2210 if (h->drv[i] != NULL)
2211 h->drv[i]->busy_configuring = 0;
ddd47442 2212 }
a72da29b 2213 }
ddd47442 2214
a72da29b
MM		 2215 /* Compare controller drive array to driver's drive array.
2216 * Check for updates in the drive information and any new drives
2217 * on the controller due to ACU adding logical drives, or changing
2218 * a logical drive's size, etc. Reregister any new/changed drives
2219 */
2220 for (i = 0; i < num_luns; i++) {
2221 int j;
ddd47442 2222
a72da29b 2223 drv_found = 0;
ddd47442 2224
39ccf9a6 2225 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2226 /* Find if the LUN is already in the drive array
2227 * of the driver. If so then update its info
2228 * if not in use. If it does not exist then find
2229 * the first free index and add it.
2230 */
2231 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2232 if (h->drv[j] != NULL &&
2233 memcmp(h->drv[j]->LunID, lunid,
2234 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2235 drv_index = j;
2236 drv_found = 1;
2237 break;
ddd47442 2238 }
a72da29b 2239 }
ddd47442 2240
a72da29b
MM		 2241 /* check if the drive was found already in the array */
2242 if (!drv_found) {
eece695f 2243 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2244 if (drv_index == -1)
2245 goto freeret;
a72da29b 2246 }
2d11d993
SC		 2247 cciss_update_drive_info(ctlr, drv_index, first_time,
2248 via_ioctl);
a72da29b 2249 } /* end for */
ddd47442 2250
6ae5ce8e 2251freeret:
ddd47442
MM		 2252 kfree(ld_buff);
2253 h->busy_configuring = 0;
2254 /* We return -1 here to tell the ACU that we have registered/updated
2255 * all of the drives that we can and to keep it from calling us
2256 * additional times.
7c832835 2257 */
ddd47442 2258 return -1;
6ae5ce8e 2259mem_msg:
ddd47442 2260 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2261 h->busy_configuring = 0;
ddd47442
MM		 2262 goto freeret;
2263}
2264
9ddb27b4
SC		 2265static void cciss_clear_drive_info(drive_info_struct *drive_info)
2266{
2267 /* zero out the disk size info */
2268 drive_info->nr_blocks = 0;
2269 drive_info->block_size = 0;
2270 drive_info->heads = 0;
2271 drive_info->sectors = 0;
2272 drive_info->cylinders = 0;
2273 drive_info->raid_level = -1;
2274 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2275 memset(drive_info->model, 0, sizeof(drive_info->model));
2276 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2277 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2278 /*
2279 * don't clear the LUNID though, we need to remember which
2280 * one this one is.
2281 */
2282}
2283
ddd47442
MM		 2284/* This function will deregister the disk and it's queue from the
2285 * kernel. It must be called with the controller lock held and the
2286 * drv structures busy_configuring flag set. It's parameters are:
2287 *
2288 * disk = This is the disk to be deregistered
2289 * drv = This is the drive_info_struct associated with the disk to be
2290 * deregistered. It contains information about the disk used
2291 * by the driver.
2292 * clear_all = This flag determines whether or not the disk information
2293 * is going to be completely cleared out and the highest_lun
2294 * reset. Sometimes we want to clear out information about
d14c4ab5 2295 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2296 * the highest_lun should be left unchanged and the LunID
2297 * should not be cleared.
2d11d993
SC		 2298 * via_ioctl
2299 * This indicates whether we've reached this path via ioctl.
2300 * This affects the maximum usage count allowed for c0d0 to be messed with.
2301 * If this path is reached via ioctl(), then the max_usage_count will
2302 * be 1, as the process calling ioctl() has got to have the device open.
2303 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2304*/
a0ea8622 2305static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2306 int clear_all, int via_ioctl)
ddd47442 2307{
799202cb 2308 int i;
a0ea8622
SC		 2309 struct gendisk *disk;
2310 drive_info_struct *drv;
9cef0d2f 2311 int recalculate_highest_lun;
1da177e4
LT		 2312
2313 if (!capable(CAP_SYS_RAWIO))
2314 return -EPERM;
2315
9cef0d2f 2316 drv = h->drv[drv_index];
a0ea8622
SC		 2317 disk = h->gendisk[drv_index];
2318
1da177e4 2319 /* make sure logical volume is NOT is use */
7c832835 2320 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2321 if (drv->usage_count > via_ioctl)
7c832835
BH		 2322 return -EBUSY;
2323 } else if (drv->usage_count > 0)
2324 return -EBUSY;
1da177e4 2325
9cef0d2f
SC		 2326 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2327
ddd47442
MM		 2328 /* invalidate the devices and deregister the disk. If it is disk
2329 * zero do not deregister it but just zero out it's values. This
2330 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2331 */
2332 if (h->gendisk[0] != disk) {
5a9df732 2333 struct request_queue *q = disk->queue;
097d0264 2334 if (disk->flags & GENHD_FL_UP) {
8ce51966 2335 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2336 del_gendisk(disk);
5a9df732 2337 }
9cef0d2f 2338 if (q)
5a9df732 2339 blk_cleanup_queue(q);
5a9df732
AB		 2340 /* If clear_all is set then we are deleting the logical
2341 * drive, not just refreshing its info. For drives
2342 * other than disk 0 we will call put_disk. We do not
2343 * do this for disk 0 as we need it to be able to
2344 * configure the controller.
a72da29b 2345 */
5a9df732
AB		 2346 if (clear_all){
2347 /* This isn't pretty, but we need to find the
2348 * disk in our array and NULL our the pointer.
2349 * This is so that we will call alloc_disk if
2350 * this index is used again later.
a72da29b 2351 */
5a9df732 2352 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2353 if (h->gendisk[i] == disk) {
5a9df732
AB		 2354 h->gendisk[i] = NULL;
2355 break;
799202cb 2356 }
799202cb 2357 }
5a9df732 2358 put_disk(disk);
ddd47442 2359 }
799202cb
MM		 2360 } else {
2361 set_capacity(disk, 0);
9cef0d2f 2362 cciss_clear_drive_info(drv);
ddd47442
MM		 2363 }
2364
2365 --h->num_luns;
ddd47442 2366
9cef0d2f
SC		 2367 /* if it was the last disk, find the new hightest lun */
2368 if (clear_all && recalculate_highest_lun) {
2369 int i, newhighest = -1;
2370 for (i = 0; i <= h->highest_lun; i++) {
2371 /* if the disk has size > 0, it is available */
2372 if (h->drv[i] && h->drv[i]->heads)
2373 newhighest = i;
1da177e4 2374 }
9cef0d2f 2375 h->highest_lun = newhighest;
ddd47442 2376 }
e2019b58 2377 return 0;
1da177e4 2378}
ddd47442 2379
b57695fe 2380static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2381 size_t size, __u8 page_code, unsigned char *scsi3addr,
2382 int cmd_type)
1da177e4 2383{
7c832835 2384 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2385 u64bit buff_dma_handle;
2386 int status = IO_OK;
2387
2388 c->cmd_type = CMD_IOCTL_PEND;
2389 c->Header.ReplyQueue = 0;
7c832835 2390 if (buff != NULL) {
1da177e4 2391 c->Header.SGList = 1;
7c832835 2392 c->Header.SGTotal = 1;
1da177e4
LT		 2393 } else {
2394 c->Header.SGList = 0;
7c832835 2395 c->Header.SGTotal = 0;
1da177e4
LT		 2396 }
2397 c->Header.Tag.lower = c->busaddr;
b57695fe 2398 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2399
2400 c->Request.Type.Type = cmd_type;
2401 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2402 switch (cmd) {
2403 case CISS_INQUIRY:
1da177e4 2404 /* are we trying to read a vital product page */
7c832835 2405 if (page_code != 0) {
1da177e4
LT		 2406 c->Request.CDB[1] = 0x01;
2407 c->Request.CDB[2] = page_code;
2408 }
2409 c->Request.CDBLen = 6;
7c832835 2410 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2411 c->Request.Type.Direction = XFER_READ;
2412 c->Request.Timeout = 0;
7c832835
BH		 2413 c->Request.CDB[0] = CISS_INQUIRY;
2414 c->Request.CDB[4] = size & 0xFF;
2415 break;
1da177e4
LT		 2416 case CISS_REPORT_LOG:
2417 case CISS_REPORT_PHYS:
7c832835 2418 /* Talking to controller so It's a physical command
1da177e4 2419 mode = 00 target = 0. Nothing to write.
7c832835 2420 */
1da177e4
LT		 2421 c->Request.CDBLen = 12;
2422 c->Request.Type.Attribute = ATTR_SIMPLE;
2423 c->Request.Type.Direction = XFER_READ;
2424 c->Request.Timeout = 0;
2425 c->Request.CDB[0] = cmd;
b028461d 2426 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
1da177e4
LT		 2427 c->Request.CDB[7] = (size >> 16) & 0xFF;
2428 c->Request.CDB[8] = (size >> 8) & 0xFF;
2429 c->Request.CDB[9] = size & 0xFF;
2430 break;
2431
2432 case CCISS_READ_CAPACITY:
1da177e4
LT		 2433 c->Request.CDBLen = 10;
2434 c->Request.Type.Attribute = ATTR_SIMPLE;
2435 c->Request.Type.Direction = XFER_READ;
2436 c->Request.Timeout = 0;
2437 c->Request.CDB[0] = cmd;
7c832835 2438 break;
00988a35 2439 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2440 c->Request.CDBLen = 16;
2441 c->Request.Type.Attribute = ATTR_SIMPLE;
2442 c->Request.Type.Direction = XFER_READ;
2443 c->Request.Timeout = 0;
2444 c->Request.CDB[0] = cmd;
2445 c->Request.CDB[1] = 0x10;
2446 c->Request.CDB[10] = (size >> 24) & 0xFF;
2447 c->Request.CDB[11] = (size >> 16) & 0xFF;
2448 c->Request.CDB[12] = (size >> 8) & 0xFF;
2449 c->Request.CDB[13] = size & 0xFF;
2450 c->Request.Timeout = 0;
2451 c->Request.CDB[0] = cmd;
2452 break;
1da177e4
LT		 2453 case CCISS_CACHE_FLUSH:
2454 c->Request.CDBLen = 12;
2455 c->Request.Type.Attribute = ATTR_SIMPLE;
2456 c->Request.Type.Direction = XFER_WRITE;
2457 c->Request.Timeout = 0;
2458 c->Request.CDB[0] = BMIC_WRITE;
2459 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2460 break;
88f627ae 2461 case TEST_UNIT_READY:
88f627ae
SC		 2462 c->Request.CDBLen = 6;
2463 c->Request.Type.Attribute = ATTR_SIMPLE;
2464 c->Request.Type.Direction = XFER_NONE;
2465 c->Request.Timeout = 0;
2466 break;
1da177e4
LT		 2467 default:
2468 printk(KERN_WARNING
7c832835 2469 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2470 return IO_ERROR;
1da177e4
LT		 2471 }
2472 } else if (cmd_type == TYPE_MSG) {
2473 switch (cmd) {
7c832835 2474 case 0: /* ABORT message */
3da8b713 2475 c->Request.CDBLen = 12;
2476 c->Request.Type.Attribute = ATTR_SIMPLE;
2477 c->Request.Type.Direction = XFER_WRITE;
2478 c->Request.Timeout = 0;
7c832835
BH		 2479 c->Request.CDB[0] = cmd; /* abort */
2480 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2481 /* buff contains the tag of the command to abort */
2482 memcpy(&c->Request.CDB[4], buff, 8);
2483 break;
7c832835 2484 case 1: /* RESET message */
88f627ae 2485 c->Request.CDBLen = 16;
3da8b713 2486 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2487 c->Request.Type.Direction = XFER_NONE;
3da8b713 2488 c->Request.Timeout = 0;
2489 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2490 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2491 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2492 break;
1da177e4
LT		 2493 case 3: /* No-Op message */
2494 c->Request.CDBLen = 1;
2495 c->Request.Type.Attribute = ATTR_SIMPLE;
2496 c->Request.Type.Direction = XFER_WRITE;
2497 c->Request.Timeout = 0;
2498 c->Request.CDB[0] = cmd;
2499 break;
2500 default:
2501 printk(KERN_WARNING
7c832835 2502 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2503 return IO_ERROR;
2504 }
2505 } else {
2506 printk(KERN_WARNING
7c832835 2507 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2508 return IO_ERROR;
2509 }
2510 /* Fill in the scatter gather information */
2511 if (size > 0) {
2512 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2513 buff, size,
2514 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2515 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2516 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2517 c->SG[0].Len = size;
7c832835 2518 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2519 }
2520 return status;
2521}
7c832835 2522
3c2ab402 2523static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2524{
2525 switch (c->err_info->ScsiStatus) {
2526 case SAM_STAT_GOOD:
2527 return IO_OK;
2528 case SAM_STAT_CHECK_CONDITION:
2529 switch (0xf & c->err_info->SenseInfo[2]) {
2530 case 0: return IO_OK; /* no sense */
2531 case 1: return IO_OK; /* recovered error */
2532 default:
c08fac65
SC		 2533 if (check_for_unit_attention(h, c))
2534 return IO_NEEDS_RETRY;
3c2ab402 2535 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2536 "check condition, sense key = 0x%02x\n",
2537 h->ctlr, c->Request.CDB[0],
2538 c->err_info->SenseInfo[2]);
2539 }
2540 break;
2541 default:
2542 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2543 "scsi status = 0x%02x\n", h->ctlr,
2544 c->Request.CDB[0], c->err_info->ScsiStatus);
2545 break;
2546 }
2547 return IO_ERROR;
2548}
2549
789a424a 2550static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2551{
5390cfc3 2552 int return_status = IO_OK;
7c832835 2553
789a424a 2554 if (c->err_info->CommandStatus == CMD_SUCCESS)
2555 return IO_OK;
5390cfc3 2556
2557 switch (c->err_info->CommandStatus) {
2558 case CMD_TARGET_STATUS:
3c2ab402 2559 return_status = check_target_status(h, c);
5390cfc3 2560 break;
2561 case CMD_DATA_UNDERRUN:
2562 case CMD_DATA_OVERRUN:
2563 /* expected for inquiry and report lun commands */
2564 break;
2565 case CMD_INVALID:
789a424a 2566 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2567 "reported invalid\n", c->Request.CDB[0]);
2568 return_status = IO_ERROR;
2569 break;
2570 case CMD_PROTOCOL_ERR:
2571 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2572 "protocol error \n", c->Request.CDB[0]);
2573 return_status = IO_ERROR;
2574 break;
2575 case CMD_HARDWARE_ERR:
2576 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2577 " hardware error\n", c->Request.CDB[0]);
2578 return_status = IO_ERROR;
2579 break;
2580 case CMD_CONNECTION_LOST:
2581 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2582 "connection lost\n", c->Request.CDB[0]);
2583 return_status = IO_ERROR;
2584 break;
2585 case CMD_ABORTED:
2586 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2587 "aborted\n", c->Request.CDB[0]);
2588 return_status = IO_ERROR;
2589 break;
2590 case CMD_ABORT_FAILED:
2591 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2592 "abort failed\n", c->Request.CDB[0]);
2593 return_status = IO_ERROR;
2594 break;
2595 case CMD_UNSOLICITED_ABORT:
2596 printk(KERN_WARNING
2597 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2598 c->Request.CDB[0]);
789a424a 2599 return_status = IO_NEEDS_RETRY;
5390cfc3 2600 break;
2601 default:
2602 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2603 "unknown status %x\n", c->Request.CDB[0],
2604 c->err_info->CommandStatus);
2605 return_status = IO_ERROR;
7c832835 2606 }
789a424a 2607 return return_status;
2608}
2609
2610static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2611 int attempt_retry)
2612{
2613 DECLARE_COMPLETION_ONSTACK(wait);
2614 u64bit buff_dma_handle;
2615 unsigned long flags;
2616 int return_status = IO_OK;
2617
2618resend_cmd2:
2619 c->waiting = &wait;
2620 /* Put the request on the tail of the queue and send it */
2621 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2622 addQ(&h->reqQ, c);
2623 h->Qdepth++;
2624 start_io(h);
2625 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2626
2627 wait_for_completion(&wait);
2628
2629 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2630 goto command_done;
2631
2632 return_status = process_sendcmd_error(h, c);
2633
2634 if (return_status == IO_NEEDS_RETRY &&
2635 c->retry_count < MAX_CMD_RETRIES) {
2636 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2637 c->Request.CDB[0]);
2638 c->retry_count++;
2639 /* erase the old error information */
2640 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2641 return_status = IO_OK;
2642 INIT_COMPLETION(wait);
2643 goto resend_cmd2;
2644 }
5390cfc3 2645
2646command_done:
1da177e4 2647 /* unlock the buffers from DMA */
bb2a37bf
MM		 2648 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2649 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2650 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2651 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2652 return return_status;
2653}
2654
b57695fe 2655static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2656 __u8 page_code, unsigned char scsi3addr[],
2657 int cmd_type)
5390cfc3 2658{
2659 ctlr_info_t *h = hba[ctlr];
2660 CommandList_struct *c;
2661 int return_status;
2662
2663 c = cmd_alloc(h, 0);
2664 if (!c)
2665 return -ENOMEM;
b57695fe 2666 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2667 scsi3addr, cmd_type);
5390cfc3 2668 if (return_status == IO_OK)
789a424a 2669 return_status = sendcmd_withirq_core(h, c, 1);
2670
1da177e4 2671 cmd_free(h, c, 0);
7c832835 2672 return return_status;
1da177e4 2673}
7c832835 2674
1da177e4 2675static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 2676 sector_t total_size,
7c832835
BH		 2677 unsigned int block_size,
2678 InquiryData_struct *inq_buff,
2679 drive_info_struct *drv)
1da177e4
LT		 2680{
2681 int return_code;
00988a35 2682 unsigned long t;
b57695fe 2683 unsigned char scsi3addr[8];
00988a35 2684
1da177e4 2685 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2686 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2687 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2688 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2689 if (return_code == IO_OK) {
7c832835 2690 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2691 printk(KERN_WARNING
7c832835
BH		 2692 "cciss: reading geometry failed, volume "
2693 "does not support reading geometry\n");
1da177e4 2694 drv->heads = 255;
b028461d 2695 drv->sectors = 32; /* Sectors per track */
7f42d3b8 2696 drv->cylinders = total_size + 1;
89f97ad1 2697 drv->raid_level = RAID_UNKNOWN;
1da177e4 2698 } else {
1da177e4
LT		 2699 drv->heads = inq_buff->data_byte[6];
2700 drv->sectors = inq_buff->data_byte[7];
2701 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2702 drv->cylinders += inq_buff->data_byte[5];
2703 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2704 }
2705 drv->block_size = block_size;
97c06978 2706 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2707 t = drv->heads * drv->sectors;
2708 if (t > 1) {
97c06978
MMOD		 2709 sector_t real_size = total_size + 1;
2710 unsigned long rem = sector_div(real_size, t);
3f7705ea 2711 if (rem)
97c06978
MMOD		 2712 real_size++;
2713 drv->cylinders = real_size;
1da177e4 2714 }
7c832835 2715 } else { /* Get geometry failed */
1da177e4
LT		 2716 printk(KERN_WARNING "cciss: reading geometry failed\n");
2717 }
1da177e4 2718}
7c832835 2719
1da177e4 2720static void
7b838bde 2721cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
7c832835 2722 unsigned int *block_size)
1da177e4 2723{
00988a35 2724 ReadCapdata_struct *buf;
1da177e4 2725 int return_code;
b57695fe 2726 unsigned char scsi3addr[8];
1aebe187
MK		 2727
2728 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2729 if (!buf) {
00988a35
MMOD		 2730 printk(KERN_WARNING "cciss: out of memory\n");
2731 return;
2732 }
1aebe187 2733
b57695fe 2734 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2735 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2736 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2737 if (return_code == IO_OK) {
4c1f2b31
AV		 2738 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2739 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2740 } else { /* read capacity command failed */
1da177e4
LT		 2741 printk(KERN_WARNING "cciss: read capacity failed\n");
2742 *total_size = 0;
2743 *block_size = BLOCK_SIZE;
2744 }
00988a35 2745 kfree(buf);
00988a35
MMOD		 2746}
2747
7b838bde
SC		 2748static void cciss_read_capacity_16(int ctlr, int logvol,
2749 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD		 2750{
2751 ReadCapdata_struct_16 *buf;
2752 int return_code;
b57695fe 2753 unsigned char scsi3addr[8];
1aebe187
MK		 2754
2755 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2756 if (!buf) {
00988a35
MMOD		 2757 printk(KERN_WARNING "cciss: out of memory\n");
2758 return;
2759 }
1aebe187 2760
b57695fe 2761 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2762 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2763 ctlr, buf, sizeof(ReadCapdata_struct_16),
2764 0, scsi3addr, TYPE_CMD);
00988a35 2765 if (return_code == IO_OK) {
4c1f2b31
AV		 2766 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2767 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2768 } else { /* read capacity command failed */
2769 printk(KERN_WARNING "cciss: read capacity failed\n");
2770 *total_size = 0;
2771 *block_size = BLOCK_SIZE;
2772 }
7b92aadf 2773 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2774 (unsigned long long)*total_size+1, *block_size);
00988a35 2775 kfree(buf);
1da177e4
LT		 2776}
2777
1da177e4
LT		 2778static int cciss_revalidate(struct gendisk *disk)
2779{
2780 ctlr_info_t *h = get_host(disk);
2781 drive_info_struct *drv = get_drv(disk);
2782 int logvol;
7c832835 2783 int FOUND = 0;
1da177e4 2784 unsigned int block_size;
00988a35 2785 sector_t total_size;
1da177e4
LT		 2786 InquiryData_struct *inq_buff = NULL;
2787
7c832835 2788 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2789 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2790 sizeof(drv->LunID)) == 0) {
7c832835 2791 FOUND = 1;
1da177e4
LT		 2792 break;
2793 }
2794 }
2795
7c832835
BH		 2796 if (!FOUND)
2797 return 1;
1da177e4 2798
7c832835
BH		 2799 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2800 if (inq_buff == NULL) {
2801 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2802 return 1;
2803 }
00988a35 2804 if (h->cciss_read == CCISS_READ_10) {
7b838bde 2805 cciss_read_capacity(h->ctlr, logvol,
00988a35
MMOD		 2806 &total_size, &block_size);
2807 } else {
7b838bde 2808 cciss_read_capacity_16(h->ctlr, logvol,
00988a35
MMOD		 2809 &total_size, &block_size);
2810 }
7b838bde 2811 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
7c832835 2812 inq_buff, drv);
1da177e4 2813
e1defc4f 2814 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2815 set_capacity(disk, drv->nr_blocks);
2816
1da177e4
LT		 2817 kfree(inq_buff);
2818 return 0;
2819}
2820
1da177e4
LT		 2821/*
2822 * Map (physical) PCI mem into (virtual) kernel space
2823 */
2824static void __iomem *remap_pci_mem(ulong base, ulong size)
2825{
7c832835
BH		 2826 ulong page_base = ((ulong) base) & PAGE_MASK;
2827 ulong page_offs = ((ulong) base) - page_base;
2828 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2829
7c832835 2830 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2831}
2832
7c832835
BH		 2833/*
2834 * Takes jobs of the Q and sends them to the hardware, then puts it on
2835 * the Q to wait for completion.
2836 */
2837static void start_io(ctlr_info_t *h)
1da177e4
LT		 2838{
2839 CommandList_struct *c;
7c832835 2840
8a3173de
JA		 2841 while (!hlist_empty(&h->reqQ)) {
2842 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2843 /* can't do anything if fifo is full */
2844 if ((h->access.fifo_full(h))) {
2845 printk(KERN_WARNING "cciss: fifo full\n");
2846 break;
2847 }
2848
7c832835 2849 /* Get the first entry from the Request Q */
8a3173de 2850 removeQ(c);
1da177e4 2851 h->Qdepth--;
7c832835
BH		 2852
2853 /* Tell the controller execute command */
1da177e4 2854 h->access.submit_command(h, c);
7c832835
BH		 2855
2856 /* Put job onto the completed Q */
8a3173de 2857 addQ(&h->cmpQ, c);
1da177e4
LT		 2858 }
2859}
7c832835 2860
1da177e4
LT		 2861/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2862/* Zeros out the error record and then resends the command back */
2863/* to the controller */
7c832835 2864static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2865{
2866 /* erase the old error information */
2867 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2868
2869 /* add it to software queue and then send it to the controller */
8a3173de 2870 addQ(&h->reqQ, c);
1da177e4 2871 h->Qdepth++;
7c832835 2872 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2873 h->maxQsinceinit = h->Qdepth;
2874
2875 start_io(h);
2876}
a9925a06 2877
1a614f50
SC		 2878static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2879 unsigned int msg_byte, unsigned int host_byte,
2880 unsigned int driver_byte)
2881{
2882 /* inverse of macros in scsi.h */
2883 return (scsi_status_byte & 0xff) |
2884 ((msg_byte & 0xff) << 8) |
2885 ((host_byte & 0xff) << 16) |
2886 ((driver_byte & 0xff) << 24);
2887}
2888
0a9279cc
MM		 2889static inline int evaluate_target_status(ctlr_info_t *h,
2890 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2891{
2892 unsigned char sense_key;
1a614f50
SC		 2893 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2894 int error_value;
2895
0a9279cc 2896 *retry_cmd = 0;
1a614f50
SC		 2897 /* If we get in here, it means we got "target status", that is, scsi status */
2898 status_byte = cmd->err_info->ScsiStatus;
2899 driver_byte = DRIVER_OK;
2900 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2901
2902 if (blk_pc_request(cmd->rq))
2903 host_byte = DID_PASSTHROUGH;
2904 else
2905 host_byte = DID_OK;
2906
2907 error_value = make_status_bytes(status_byte, msg_byte,
2908 host_byte, driver_byte);
03bbfee5 2909
1a614f50 2910 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2911 if (!blk_pc_request(cmd->rq))
2912 printk(KERN_WARNING "cciss: cmd %p "
2913 "has SCSI Status 0x%x\n",
2914 cmd, cmd->err_info->ScsiStatus);
1a614f50 2915 return error_value;
03bbfee5
MMOD		 2916 }
2917
2918 /* check the sense key */
2919 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2920 /* no status or recovered error */
1a614f50
SC		 2921 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2922 error_value = 0;
03bbfee5 2923
0a9279cc
MM		 2924 if (check_for_unit_attention(h, cmd)) {
2925 *retry_cmd = !blk_pc_request(cmd->rq);
2926 return 0;
2927 }
2928
03bbfee5 2929 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2930 if (error_value != 0)
03bbfee5
MMOD		 2931 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2932 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2933 return error_value;
03bbfee5
MMOD		 2934 }
2935
2936 /* SG_IO or similar, copy sense data back */
2937 if (cmd->rq->sense) {
2938 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2939 cmd->rq->sense_len = cmd->err_info->SenseLen;
2940 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2941 cmd->rq->sense_len);
2942 } else
2943 cmd->rq->sense_len = 0;
2944
1a614f50 2945 return error_value;
03bbfee5
MMOD		 2946}
2947
7c832835 2948/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 2949 * buffers for the completed job. Note that this function does not need
2950 * to hold the hba/queue lock.
7c832835
BH		 2951 */
2952static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2953 int timeout)
1da177e4 2954{
1da177e4 2955 int retry_cmd = 0;
198b7660
MMOD		 2956 struct request *rq = cmd->rq;
2957
2958 rq->errors = 0;
7c832835 2959
1da177e4 2960 if (timeout)
1a614f50 2961 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 2962
d38ae168
MMOD		 2963 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2964 goto after_error_processing;
7c832835 2965
d38ae168 2966 switch (cmd->err_info->CommandStatus) {
d38ae168 2967 case CMD_TARGET_STATUS:
0a9279cc 2968 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 2969 break;
2970 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 2971 if (blk_fs_request(cmd->rq)) {
2972 printk(KERN_WARNING "cciss: cmd %p has"
2973 " completed with data underrun "
2974 "reported\n", cmd);
c3a4d78c 2975 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 2976 }
d38ae168
MMOD		 2977 break;
2978 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 2979 if (blk_fs_request(cmd->rq))
2980 printk(KERN_WARNING "cciss: cmd %p has"
2981 " completed with data overrun "
2982 "reported\n", cmd);
d38ae168
MMOD		 2983 break;
2984 case CMD_INVALID:
2985 printk(KERN_WARNING "cciss: cmd %p is "
2986 "reported invalid\n", cmd);
1a614f50
SC		 2987 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2988 cmd->err_info->CommandStatus, DRIVER_OK,
2989 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2990 break;
2991 case CMD_PROTOCOL_ERR:
2992 printk(KERN_WARNING "cciss: cmd %p has "
2993 "protocol error \n", cmd);
1a614f50
SC		 2994 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2995 cmd->err_info->CommandStatus, DRIVER_OK,
2996 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2997 break;
2998 case CMD_HARDWARE_ERR:
2999 printk(KERN_WARNING "cciss: cmd %p had "
3000 " hardware error\n", cmd);
1a614f50
SC		 3001 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3002 cmd->err_info->CommandStatus, DRIVER_OK,
3003 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3004 break;
3005 case CMD_CONNECTION_LOST:
3006 printk(KERN_WARNING "cciss: cmd %p had "
3007 "connection lost\n", cmd);
1a614f50
SC		 3008 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3009 cmd->err_info->CommandStatus, DRIVER_OK,
3010 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3011 break;
3012 case CMD_ABORTED:
3013 printk(KERN_WARNING "cciss: cmd %p was "
3014 "aborted\n", cmd);
1a614f50
SC		 3015 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3016 cmd->err_info->CommandStatus, DRIVER_OK,
3017 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3018 break;
3019 case CMD_ABORT_FAILED:
3020 printk(KERN_WARNING "cciss: cmd %p reports "
3021 "abort failed\n", cmd);
1a614f50
SC		 3022 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3023 cmd->err_info->CommandStatus, DRIVER_OK,
3024 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3025 break;
3026 case CMD_UNSOLICITED_ABORT:
3027 printk(KERN_WARNING "cciss%d: unsolicited "
3028 "abort %p\n", h->ctlr, cmd);
3029 if (cmd->retry_count < MAX_CMD_RETRIES) {
3030 retry_cmd = 1;
3031 printk(KERN_WARNING
3032 "cciss%d: retrying %p\n", h->ctlr, cmd);
3033 cmd->retry_count++;
3034 } else
3035 printk(KERN_WARNING
3036 "cciss%d: %p retried too "
3037 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3038 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3039 cmd->err_info->CommandStatus, DRIVER_OK,
3040 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3041 break;
3042 case CMD_TIMEOUT:
3043 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3044 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3045 cmd->err_info->CommandStatus, DRIVER_OK,
3046 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3047 break;
3048 default:
3049 printk(KERN_WARNING "cciss: cmd %p returned "
3050 "unknown status %x\n", cmd,
3051 cmd->err_info->CommandStatus);
1a614f50
SC		 3052 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3053 cmd->err_info->CommandStatus, DRIVER_OK,
3054 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3055 }
d38ae168
MMOD		 3056
3057after_error_processing:
3058
1da177e4 3059 /* We need to return this command */
7c832835
BH		 3060 if (retry_cmd) {
3061 resend_cciss_cmd(h, cmd);
1da177e4 3062 return;
7c832835 3063 }
03bbfee5 3064 cmd->rq->completion_data = cmd;
a9925a06 3065 blk_complete_request(cmd->rq);
1da177e4
LT		 3066}
3067
7c832835
BH		 3068/*
3069 * Get a request and submit it to the controller.
1da177e4 3070 */
165125e1 3071static void do_cciss_request(struct request_queue *q)
1da177e4 3072{
7c832835 3073 ctlr_info_t *h = q->queuedata;
1da177e4 3074 CommandList_struct *c;
00988a35
MMOD		 3075 sector_t start_blk;
3076 int seg;
1da177e4
LT		 3077 struct request *creq;
3078 u64bit temp64;
5c07a311
DB		 3079 struct scatterlist *tmp_sg;
3080 SGDescriptor_struct *curr_sg;
1da177e4
LT		 3081 drive_info_struct *drv;
3082 int i, dir;
5c07a311
DB		 3083 int nseg = 0;
3084 int sg_index = 0;
3085 int chained = 0;
1da177e4
LT		 3086
3087 /* We call start_io here in case there is a command waiting on the
3088 * queue that has not been sent.
7c832835 3089 */
1da177e4
LT		 3090 if (blk_queue_plugged(q))
3091 goto startio;
3092
7c832835 3093 queue:
9934c8c0 3094 creq = blk_peek_request(q);
1da177e4
LT		 3095 if (!creq)
3096 goto startio;
3097
5c07a311 3098 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
1da177e4 3099
7c832835 3100 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3101 goto full;
3102
9934c8c0 3103 blk_start_request(creq);
1da177e4 3104
5c07a311 3105 tmp_sg = h->scatter_list[c->cmdindex];
1da177e4
LT		 3106 spin_unlock_irq(q->queue_lock);
3107
3108 c->cmd_type = CMD_RWREQ;
3109 c->rq = creq;
7c832835
BH		 3110
3111 /* fill in the request */
1da177e4 3112 drv = creq->rq_disk->private_data;
b028461d 3113 c->Header.ReplyQueue = 0; /* unused in simple mode */
33079b21
MM		 3114 /* got command from pool, so use the command block index instead */
3115 /* for direct lookups. */
3116 /* The first 2 bits are reserved for controller error reporting. */
3117 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3118 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3119 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
b028461d 3120 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3121 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
7c832835
BH		 3122 c->Request.Type.Attribute = ATTR_SIMPLE;
3123 c->Request.Type.Direction =
a52de245 3124 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
b028461d 3125 c->Request.Timeout = 0; /* Don't time out */
7c832835 3126 c->Request.CDB[0] =
00988a35 3127 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3128 start_blk = blk_rq_pos(creq);
1da177e4 3129#ifdef CCISS_DEBUG
83096ebf
TH		 3130 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3131 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3132#endif /* CCISS_DEBUG */
1da177e4 3133
5c07a311 3134 sg_init_table(tmp_sg, h->maxsgentries);
1da177e4
LT		 3135 seg = blk_rq_map_sg(q, creq, tmp_sg);
3136
7c832835 3137 /* get the DMA records for the setup */
1da177e4
LT		 3138 if (c->Request.Type.Direction == XFER_READ)
3139 dir = PCI_DMA_FROMDEVICE;
3140 else
3141 dir = PCI_DMA_TODEVICE;
3142
5c07a311
DB		 3143 curr_sg = c->SG;
3144 sg_index = 0;
3145 chained = 0;
3146
7c832835 3147 for (i = 0; i < seg; i++) {
5c07a311
DB		 3148 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3149 !chained && ((seg - i) > 1)) {
3150 nseg = seg - i;
3151 curr_sg[sg_index].Len = (nseg) *
3152 sizeof(SGDescriptor_struct);
3153 curr_sg[sg_index].Ext = CCISS_SG_CHAIN;
3154
3155 /* Point to next chain block. */
3156 curr_sg = h->cmd_sg_list[c->cmdindex]->sgchain;
3157 sg_index = 0;
3158 chained = 1;
3159 }
3160 curr_sg[sg_index].Len = tmp_sg[i].length;
45711f1a 3161 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
5c07a311
DB		 3162 tmp_sg[i].offset,
3163 tmp_sg[i].length, dir);
3164 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3165 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3166 curr_sg[sg_index].Ext = 0; /* we are not chaining */
3167
3168 ++sg_index;
1da177e4 3169 }
5c07a311
DB		 3170
3171 if (chained) {
3172 int len;
3173 curr_sg = c->SG;
3174 sg_index = h->max_cmd_sgentries - 1;
3175 len = curr_sg[sg_index].Len;
3176 /* Setup pointer to next chain block.
3177 * Fill out last element in current chain
3178 * block with address of next chain block.
3179 */
3180 temp64.val = pci_map_single(h->pdev,
3181 h->cmd_sg_list[c->cmdindex]->sgchain,
3182 len, dir);
3183
3184 h->cmd_sg_list[c->cmdindex]->sg_chain_dma = temp64.val;
3185 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3186 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3187
3188 pci_dma_sync_single_for_device(h->pdev,
3189 h->cmd_sg_list[c->cmdindex]->sg_chain_dma,
3190 len, dir);
3191 }
3192
7c832835
BH		 3193 /* track how many SG entries we are using */
3194 if (seg > h->maxSG)
3195 h->maxSG = seg;
1da177e4
LT		 3196
3197#ifdef CCISS_DEBUG
5c07a311
DB		 3198 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3199 "chained[%d]\n",
3200 blk_rq_sectors(creq), seg, chained);
7c832835 3201#endif /* CCISS_DEBUG */
1da177e4 3202
5c07a311
DB		 3203 c->Header.SGList = c->Header.SGTotal = seg + chained;
3204 if (seg > h->max_cmd_sgentries)
3205 c->Header.SGList = h->max_cmd_sgentries;
3206
03bbfee5
MMOD		 3207 if (likely(blk_fs_request(creq))) {
3208 if(h->cciss_read == CCISS_READ_10) {
3209 c->Request.CDB[1] = 0;
b028461d 3210 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
03bbfee5
MMOD		 3211 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3212 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3213 c->Request.CDB[5] = start_blk & 0xff;
b028461d 3214 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
83096ebf
TH		 3215 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3216 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3217 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3218 } else {
582539e5
RD		 3219 u32 upper32 = upper_32_bits(start_blk);
3220
03bbfee5
MMOD		 3221 c->Request.CDBLen = 16;
3222 c->Request.CDB[1]= 0;
b028461d 3223 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
582539e5
RD		 3224 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3225 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3226 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3227 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3228 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3229 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3230 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3231 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3232 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3233 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3234 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3235 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3236 }
3237 } else if (blk_pc_request(creq)) {
3238 c->Request.CDBLen = creq->cmd_len;
3239 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3240 } else {
03bbfee5
MMOD		 3241 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3242 BUG();
00988a35 3243 }
1da177e4
LT		 3244
3245 spin_lock_irq(q->queue_lock);
3246
8a3173de 3247 addQ(&h->reqQ, c);
1da177e4 3248 h->Qdepth++;
7c832835
BH		 3249 if (h->Qdepth > h->maxQsinceinit)
3250 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3251
3252 goto queue;
00988a35 3253full:
1da177e4 3254 blk_stop_queue(q);
00988a35 3255startio:
1da177e4
LT		 3256 /* We will already have the driver lock here so not need
3257 * to lock it.
7c832835 3258 */
1da177e4
LT		 3259 start_io(h);
3260}
3261
3da8b713 3262static inline unsigned long get_next_completion(ctlr_info_t *h)
3263{
3da8b713 3264 return h->access.command_completed(h);
3da8b713 3265}
3266
3267static inline int interrupt_pending(ctlr_info_t *h)
3268{
3da8b713 3269 return h->access.intr_pending(h);
3da8b713 3270}
3271
3272static inline long interrupt_not_for_us(ctlr_info_t *h)
3273{
7c832835 3274 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3275 (h->interrupts_enabled == 0)));
3da8b713 3276}
3277
7d12e780 3278static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3279{
3280 ctlr_info_t *h = dev_id;
3281 CommandList_struct *c;
3282 unsigned long flags;
33079b21 3283 __u32 a, a1, a2;
1da177e4 3284
3da8b713 3285 if (interrupt_not_for_us(h))
1da177e4 3286 return IRQ_NONE;
1da177e4
LT		 3287 /*
3288 * If there are completed commands in the completion queue,
3289 * we had better do something about it.
3290 */
3291 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3292 while (interrupt_pending(h)) {
7c832835 3293 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3294 a1 = a;
33079b21
MM		 3295 if ((a & 0x04)) {
3296 a2 = (a >> 3);
f880632f 3297 if (a2 >= h->nr_cmds) {
7c832835
BH		 3298 printk(KERN_WARNING
3299 "cciss: controller cciss%d failed, stopping.\n",
3300 h->ctlr);
33079b21
MM		 3301 fail_all_cmds(h->ctlr);
3302 return IRQ_HANDLED;
3303 }
3304
3305 c = h->cmd_pool + a2;
3306 a = c->busaddr;
3307
3308 } else {
8a3173de
JA		 3309 struct hlist_node *tmp;
3310
7c832835 3311 a &= ~3;
8a3173de
JA		 3312 c = NULL;
3313 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3314 if (c->busaddr == a)
7c832835
BH		 3315 break;
3316 }
33079b21 3317 }
1da177e4
LT		 3318 /*
3319 * If we've found the command, take it off the
3320 * completion Q and free it
3321 */
8a3173de
JA		 3322 if (c && c->busaddr == a) {
3323 removeQ(c);
1da177e4
LT		 3324 if (c->cmd_type == CMD_RWREQ) {
3325 complete_command(h, c, 0);
3326 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3327 complete(c->waiting);
3328 }
3329# ifdef CONFIG_CISS_SCSI_TAPE
3330 else if (c->cmd_type == CMD_SCSI)
3331 complete_scsi_command(c, 0, a1);
3332# endif
3333 continue;
3334 }
3335 }
3336 }
3337
1da177e4
LT		 3338 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3339 return IRQ_HANDLED;
3340}
7c832835 3341
b368c9dd
AP		 3342/**
3343 * add_to_scan_list() - add controller to rescan queue
3344 * @h: Pointer to the controller.
3345 *
3346 * Adds the controller to the rescan queue if not already on the queue.
3347 *
3348 * returns 1 if added to the queue, 0 if skipped (could be on the
3349 * queue already, or the controller could be initializing or shutting
3350 * down).
3351 **/
3352static int add_to_scan_list(struct ctlr_info *h)
3353{
3354 struct ctlr_info *test_h;
3355 int found = 0;
3356 int ret = 0;
3357
3358 if (h->busy_initializing)
3359 return 0;
3360
3361 if (!mutex_trylock(&h->busy_shutting_down))
3362 return 0;
3363
3364 mutex_lock(&scan_mutex);
3365 list_for_each_entry(test_h, &scan_q, scan_list) {
3366 if (test_h == h) {
3367 found = 1;
3368 break;
3369 }
3370 }
3371 if (!found && !h->busy_scanning) {
3372 INIT_COMPLETION(h->scan_wait);
3373 list_add_tail(&h->scan_list, &scan_q);
3374 ret = 1;
3375 }
3376 mutex_unlock(&scan_mutex);
3377 mutex_unlock(&h->busy_shutting_down);
3378
3379 return ret;
3380}
3381
3382/**
3383 * remove_from_scan_list() - remove controller from rescan queue
3384 * @h: Pointer to the controller.
3385 *
3386 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC		 3387 * the controller is currently conducting a rescan. The controller
3388 * can be in one of three states:
3389 * 1. Doesn't need a scan
3390 * 2. On the scan list, but not scanning yet (we remove it)
3391 * 3. Busy scanning (and not on the list). In this case we want to wait for
3392 * the scan to complete to make sure the scanning thread for this
3393 * controller is completely idle.
b368c9dd
AP		 3394 **/
3395static void remove_from_scan_list(struct ctlr_info *h)
3396{
3397 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP		 3398
3399 mutex_lock(&scan_mutex);
3400 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3401 if (test_h == h) { /* state 2. */
b368c9dd
AP		 3402 list_del(&h->scan_list);
3403 complete_all(&h->scan_wait);
3404 mutex_unlock(&scan_mutex);
3405 return;
3406 }
3407 }
fd8489cf
SC		 3408 if (h->busy_scanning) { /* state 3. */
3409 mutex_unlock(&scan_mutex);
b368c9dd 3410 wait_for_completion(&h->scan_wait);
fd8489cf
SC		 3411 } else { /* state 1, nothing to do. */
3412 mutex_unlock(&scan_mutex);
3413 }
b368c9dd
AP		 3414}
3415
3416/**
3417 * scan_thread() - kernel thread used to rescan controllers
3418 * @data: Ignored.
3419 *
3420 * A kernel thread used scan for drive topology changes on
3421 * controllers. The thread processes only one controller at a time
3422 * using a queue. Controllers are added to the queue using
3423 * add_to_scan_list() and removed from the queue either after done
3424 * processing or using remove_from_scan_list().
3425 *
3426 * returns 0.
3427 **/
0a9279cc
MM		 3428static int scan_thread(void *data)
3429{
b368c9dd 3430 struct ctlr_info *h;
0a9279cc 3431
b368c9dd
AP		 3432 while (1) {
3433 set_current_state(TASK_INTERRUPTIBLE);
3434 schedule();
0a9279cc
MM		 3435 if (kthread_should_stop())
3436 break;
b368c9dd
AP		 3437
3438 while (1) {
3439 mutex_lock(&scan_mutex);
3440 if (list_empty(&scan_q)) {
3441 mutex_unlock(&scan_mutex);
3442 break;
3443 }
3444
3445 h = list_entry(scan_q.next,
3446 struct ctlr_info,
3447 scan_list);
3448 list_del(&h->scan_list);
3449 h->busy_scanning = 1;
3450 mutex_unlock(&scan_mutex);
3451
d06dfbd2
SC		 3452 rebuild_lun_table(h, 0, 0);
3453 complete_all(&h->scan_wait);
3454 mutex_lock(&scan_mutex);
3455 h->busy_scanning = 0;
3456 mutex_unlock(&scan_mutex);
b368c9dd 3457 }
0a9279cc 3458 }
b368c9dd 3459
0a9279cc
MM		 3460 return 0;
3461}
3462
3463static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3464{
3465 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3466 return 0;
3467
3468 switch (c->err_info->SenseInfo[12]) {
3469 case STATE_CHANGED:
3470 printk(KERN_WARNING "cciss%d: a state change "
3471 "detected, command retried\n", h->ctlr);
3472 return 1;
3473 break;
3474 case LUN_FAILED:
3475 printk(KERN_WARNING "cciss%d: LUN failure "
3476 "detected, action required\n", h->ctlr);
3477 return 1;
3478 break;
3479 case REPORT_LUNS_CHANGED:
3480 printk(KERN_WARNING "cciss%d: report LUN data "
3481 "changed\n", h->ctlr);
da002184
SC		 3482 /*
3483 * Here, we could call add_to_scan_list and wake up the scan thread,
3484 * except that it's quite likely that we will get more than one
3485 * REPORT_LUNS_CHANGED condition in quick succession, which means
3486 * that those which occur after the first one will likely happen
3487 * *during* the scan_thread's rescan. And the rescan code is not
3488 * robust enough to restart in the middle, undoing what it has already
3489 * done, and it's not clear that it's even possible to do this, since
3490 * part of what it does is notify the block layer, which starts
3491 * doing it's own i/o to read partition tables and so on, and the
3492 * driver doesn't have visibility to know what might need undoing.
3493 * In any event, if possible, it is horribly complicated to get right
3494 * so we just don't do it for now.
3495 *
3496 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3497 */
0a9279cc
MM		 3498 return 1;
3499 break;
3500 case POWER_OR_RESET:
3501 printk(KERN_WARNING "cciss%d: a power on "
3502 "or device reset detected\n", h->ctlr);
3503 return 1;
3504 break;
3505 case UNIT_ATTENTION_CLEARED:
3506 printk(KERN_WARNING "cciss%d: unit attention "
3507 "cleared by another initiator\n", h->ctlr);
3508 return 1;
3509 break;
3510 default:
3511 printk(KERN_WARNING "cciss%d: unknown "
3512 "unit attention detected\n", h->ctlr);
3513 return 1;
3514 }
3515}
3516
7c832835 3517/*
d14c4ab5 3518 * We cannot read the structure directly, for portability we must use
1da177e4 3519 * the io functions.
7c832835 3520 * This is for debug only.
1da177e4
LT		 3521 */
3522#ifdef CCISS_DEBUG
7c832835 3523static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3524{
3525 int i;
3526 char temp_name[17];
3527
3528 printk("Controller Configuration information\n");
3529 printk("------------------------------------\n");
7c832835 3530 for (i = 0; i < 4; i++)
1da177e4 3531 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3532 temp_name[4] = '\0';
3533 printk(" Signature = %s\n", temp_name);
1da177e4 3534 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3535 printk(" Transport methods supported = 0x%x\n",
3536 readl(&(tb->TransportSupport)));
3537 printk(" Transport methods active = 0x%x\n",
3538 readl(&(tb->TransportActive)));
3539 printk(" Requested transport Method = 0x%x\n",
3540 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3541 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3542 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3543 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3544 readl(&(tb->HostWrite.CoalIntCount)));
3545 printk(" Max outstanding commands = 0x%d\n",
3546 readl(&(tb->CmdsOutMax)));
3547 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3548 for (i = 0; i < 16; i++)
1da177e4
LT		 3549 temp_name[i] = readb(&(tb->ServerName[i]));
3550 temp_name[16] = '\0';
3551 printk(" Server Name = %s\n", temp_name);
7c832835 3552 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3553}
7c832835 3554#endif /* CCISS_DEBUG */
1da177e4 3555
7c832835 3556static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3557{
3558 int i, offset, mem_type, bar_type;
7c832835 3559 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3560 return 0;
3561 offset = 0;
7c832835
BH		 3562 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3563 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3564 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3565 offset += 4;
3566 else {
3567 mem_type = pci_resource_flags(pdev, i) &
7c832835 3568 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3569 switch (mem_type) {
7c832835
BH		 3570 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3571 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3572 offset += 4; /* 32 bit */
3573 break;
3574 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3575 offset += 8;
3576 break;
3577 default: /* reserved in PCI 2.2 */
3578 printk(KERN_WARNING
3579 "Base address is invalid\n");
3580 return -1;
1da177e4
LT		 3581 break;
3582 }
3583 }
7c832835
BH		 3584 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3585 return i + 1;
1da177e4
LT		 3586 }
3587 return -1;
3588}
3589
fb86a35b
MM		 3590/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3591 * controllers that are capable. If not, we use IO-APIC mode.
3592 */
3593
7c832835
BH		 3594static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3595 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3596{
3597#ifdef CONFIG_PCI_MSI
7c832835
BH		 3598 int err;
3599 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3600 {0, 2}, {0, 3}
3601 };
fb86a35b
MM		 3602
3603 /* Some boards advertise MSI but don't really support it */
3604 if ((board_id == 0x40700E11) ||
7c832835
BH		 3605 (board_id == 0x40800E11) ||
3606 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3607 goto default_int_mode;
3608
7c832835
BH		 3609 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3610 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3611 if (!err) {
3612 c->intr[0] = cciss_msix_entries[0].vector;
3613 c->intr[1] = cciss_msix_entries[1].vector;
3614 c->intr[2] = cciss_msix_entries[2].vector;
3615 c->intr[3] = cciss_msix_entries[3].vector;
3616 c->msix_vector = 1;
3617 return;
3618 }
3619 if (err > 0) {
3620 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3621 "available\n", err);
1ecb9c0f 3622 goto default_int_mode;
7c832835
BH		 3623 } else {
3624 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3625 err);
1ecb9c0f 3626 goto default_int_mode;
7c832835
BH		 3627 }
3628 }
3629 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3630 if (!pci_enable_msi(pdev)) {
7c832835 3631 c->msi_vector = 1;
7c832835
BH		 3632 } else {
3633 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3634 }
3635 }
1ecb9c0f 3636default_int_mode:
7c832835 3637#endif /* CONFIG_PCI_MSI */
fb86a35b 3638 /* if we get here we're going to use the default interrupt mode */
7c832835 3639 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3640 return;
3641}
3642
7d1fd970 3643static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3644{
3645 ushort subsystem_vendor_id, subsystem_device_id, command;
3646 __u32 board_id, scratchpad = 0;
3647 __u64 cfg_offset;
3648 __u32 cfg_base_addr;
3649 __u64 cfg_base_addr_index;
2ec24ff1
SC		 3650 int i, prod_index, err;
3651
3652 subsystem_vendor_id = pdev->subsystem_vendor;
3653 subsystem_device_id = pdev->subsystem_device;
3654 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3655 subsystem_vendor_id);
3656
3657 for (i = 0; i < ARRAY_SIZE(products); i++) {
3658 /* Stand aside for hpsa driver on request */
3659 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3660 return -ENODEV;
3661 if (board_id == products[i].board_id)
3662 break;
3663 }
3664 prod_index = i;
3665 if (prod_index == ARRAY_SIZE(products)) {
3666 dev_warn(&pdev->dev,
3667 "unrecognized board ID: 0x%08lx, ignoring.\n",
3668 (unsigned long) board_id);
3669 return -ENODEV;
3670 }
1da177e4
LT		 3671
3672 /* check to see if controller has been disabled */
3673 /* BEFORE trying to enable it */
7c832835
BH		 3674 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3675 if (!(command & 0x02)) {
3676 printk(KERN_WARNING
3677 "cciss: controller appears to be disabled\n");
c33ac89b 3678 return -ENODEV;
1da177e4
LT		 3679 }
3680
c33ac89b 3681 err = pci_enable_device(pdev);
7c832835 3682 if (err) {
1da177e4 3683 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3684 return err;
1da177e4 3685 }
1da177e4 3686
4e570309
BH		 3687 err = pci_request_regions(pdev, "cciss");
3688 if (err) {
3689 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3690 "aborting\n");
872225ca 3691 return err;
4e570309
BH		 3692 }
3693
1da177e4
LT		 3694#ifdef CCISS_DEBUG
3695 printk("command = %x\n", command);
3696 printk("irq = %x\n", pdev->irq);
3697 printk("board_id = %x\n", board_id);
7c832835 3698#endif /* CCISS_DEBUG */
1da177e4 3699
fb86a35b
MM		 3700/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3701 * else we use the IO-APIC interrupt assigned to us by system ROM.
3702 */
3703 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3704
e1438581
MM		 3705 /* find the memory BAR */
3706 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3707 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3708 break;
3709 }
3710 if (i == DEVICE_COUNT_RESOURCE) {
3711 printk(KERN_WARNING "cciss: No memory BAR found\n");
3712 err = -ENODEV;
3713 goto err_out_free_res;
3714 }
3715
3716 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3717 * already removed
3718 */
1da177e4 3719
1da177e4 3720#ifdef CCISS_DEBUG
9f92f471 3721 printk("address 0 = %lx\n", c->paddr);
7c832835 3722#endif /* CCISS_DEBUG */
a5b92873 3723 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3724
3725 /* Wait for the board to become ready. (PCI hotplug needs this.)
3726 * We poll for up to 120 secs, once per 100ms. */
7c832835 3727 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3728 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3729 if (scratchpad == CCISS_FIRMWARE_READY)
3730 break;
3731 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3732 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3733 }
3734 if (scratchpad != CCISS_FIRMWARE_READY) {
3735 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3736 err = -ENODEV;
4e570309 3737 goto err_out_free_res;
1da177e4
LT		 3738 }
3739
3740 /* get the address index number */
3741 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3742 cfg_base_addr &= (__u32) 0x0000ffff;
3743#ifdef CCISS_DEBUG
3744 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3745#endif /* CCISS_DEBUG */
3746 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3747#ifdef CCISS_DEBUG
9f92f471
RD		 3748 printk("cfg base address index = %llx\n",
3749 (unsigned long long)cfg_base_addr_index);
7c832835 3750#endif /* CCISS_DEBUG */
1da177e4
LT		 3751 if (cfg_base_addr_index == -1) {
3752 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3753 err = -ENODEV;
4e570309 3754 goto err_out_free_res;
1da177e4
LT		 3755 }
3756
3757 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3758#ifdef CCISS_DEBUG
9f92f471 3759 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3760#endif /* CCISS_DEBUG */
3761 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3762 cfg_base_addr_index) +
3763 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3764 c->board_id = board_id;
3765
3766#ifdef CCISS_DEBUG
945f390f 3767 print_cfg_table(c->cfgtable);
7c832835 3768#endif /* CCISS_DEBUG */
1da177e4 3769
49153998
MM		 3770 /* Some controllers support Zero Memory Raid (ZMR).
3771 * When configured in ZMR mode the number of supported
3772 * commands drops to 64. So instead of just setting an
3773 * arbitrary value we make the driver a little smarter.
3774 * We read the config table to tell us how many commands
3775 * are supported on the controller then subtract 4 to
3776 * leave a little room for ioctl calls.
3777 */
3778 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
5c07a311
DB		 3779 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
3780
3781 /*
3782 * Limit native command to 32 s/g elements to save dma'able memory.
3783 * Howvever spec says if 0, use 31
3784 */
3785
3786 c->max_cmd_sgentries = 31;
3787 if (c->maxsgentries > 512) {
3788 c->max_cmd_sgentries = 32;
3789 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
3790 c->maxsgentries -= 1; /* account for chain pointer */
3791 } else {
3792 c->maxsgentries = 31; /* Default to traditional value */
3793 c->chainsize = 0; /* traditional */
3794 }
3795
2ec24ff1
SC		 3796 c->product_name = products[prod_index].product_name;
3797 c->access = *(products[prod_index].access);
3798 c->nr_cmds = c->max_commands - 4;
7c832835
BH		 3799 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3800 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3801 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3802 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3803 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3804 err = -ENODEV;
4e570309 3805 goto err_out_free_res;
1da177e4 3806 }
1da177e4 3807#ifdef CONFIG_X86
7c832835
BH		 3808 {
3809 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3810 __u32 prefetch;
3811 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3812 prefetch |= 0x100;
3813 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3814 }
1da177e4
LT		 3815#endif
3816
8bf50f71
MMOD		 3817 /* Disabling DMA prefetch and refetch for the P600.
3818 * An ASIC bug may result in accesses to invalid memory addresses.
3819 * We've disabled prefetch for some time now. Testing with XEN
3820 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3821 */
3822 if(board_id == 0x3225103C) {
3823 __u32 dma_prefetch;
8bf50f71 3824 __u32 dma_refetch;
f92e2f5f
MM		 3825 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3826 dma_prefetch |= 0x8000;
3827 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3828 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3829 dma_refetch |= 0x1;
3830 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3831 }
3832
1da177e4
LT		 3833#ifdef CCISS_DEBUG
3834 printk("Trying to put board into Simple mode\n");
7c832835 3835#endif /* CCISS_DEBUG */
1da177e4 3836 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3837 /* Update the field, and then ring the doorbell */
3838 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3839 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3840
3841 /* under certain very rare conditions, this can take awhile.
3842 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3843 * as we enter this code.) */
7c832835 3844 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3845 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3846 break;
3847 /* delay and try again */
3848 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3849 schedule_timeout(msecs_to_jiffies(1));
7c832835 3850 }
1da177e4
LT		 3851
3852#ifdef CCISS_DEBUG
7c832835
BH		 3853 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3854 readl(c->vaddr + SA5_DOORBELL));
3855#endif /* CCISS_DEBUG */
1da177e4 3856#ifdef CCISS_DEBUG
7c832835
BH		 3857 print_cfg_table(c->cfgtable);
3858#endif /* CCISS_DEBUG */
1da177e4 3859
7c832835 3860 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3861 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3862 " simple mode\n");
c33ac89b 3863 err = -ENODEV;
4e570309 3864 goto err_out_free_res;
1da177e4
LT		 3865 }
3866 return 0;
3867
5faad620 3868err_out_free_res:
872225ca
MM		 3869 /*
3870 * Deliberately omit pci_disable_device(): it does something nasty to
3871 * Smart Array controllers that pci_enable_device does not undo
3872 */
4e570309 3873 pci_release_regions(pdev);
c33ac89b 3874 return err;
1da177e4
LT		 3875}
3876
6ae5ce8e
MM		 3877/* Function to find the first free pointer into our hba[] array
3878 * Returns -1 if no free entries are left.
7c832835 3879 */
1da177e4
LT		 3880static int alloc_cciss_hba(void)
3881{
799202cb 3882 int i;
1da177e4 3883
7c832835 3884 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3885 if (!hba[i]) {
3886 ctlr_info_t *p;
f2912a12 3887
06ff37ff 3888 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3889 if (!p)
3890 goto Enomem;
1da177e4
LT		 3891 hba[i] = p;
3892 return i;
3893 }
3894 }
3895 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3896 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3897 return -1;
3898Enomem:
1da177e4 3899 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3900 return -1;
3901}
3902
2c935593 3903static void free_hba(int n)
1da177e4 3904{
2c935593
SC		 3905 ctlr_info_t *h = hba[n];
3906 int i;
1da177e4 3907
2c935593
SC		 3908 hba[n] = NULL;
3909 for (i = 0; i < h->highest_lun + 1; i++)
3910 if (h->gendisk[i] != NULL)
3911 put_disk(h->gendisk[i]);
3912 kfree(h);
1da177e4
LT		 3913}
3914
82eb03cf
CC		 3915/* Send a message CDB to the firmware. */
3916static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3917{
3918 typedef struct {
3919 CommandListHeader_struct CommandHeader;
3920 RequestBlock_struct Request;
3921 ErrDescriptor_struct ErrorDescriptor;
3922 } Command;
3923 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3924 Command *cmd;
3925 dma_addr_t paddr64;
3926 uint32_t paddr32, tag;
3927 void __iomem *vaddr;
3928 int i, err;
3929
3930 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3931 if (vaddr == NULL)
3932 return -ENOMEM;
3933
3934 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3935 CCISS commands, so they must be allocated from the lower 4GiB of
3936 memory. */
e930438c 3937 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3938 if (err) {
3939 iounmap(vaddr);
3940 return -ENOMEM;
3941 }
3942
3943 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3944 if (cmd == NULL) {
3945 iounmap(vaddr);
3946 return -ENOMEM;
3947 }
3948
3949 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3950 although there's no guarantee, we assume that the address is at
3951 least 4-byte aligned (most likely, it's page-aligned). */
3952 paddr32 = paddr64;
3953
3954 cmd->CommandHeader.ReplyQueue = 0;
3955 cmd->CommandHeader.SGList = 0;
3956 cmd->CommandHeader.SGTotal = 0;
3957 cmd->CommandHeader.Tag.lower = paddr32;
3958 cmd->CommandHeader.Tag.upper = 0;
3959 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3960
3961 cmd->Request.CDBLen = 16;
3962 cmd->Request.Type.Type = TYPE_MSG;
3963 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3964 cmd->Request.Type.Direction = XFER_NONE;
3965 cmd->Request.Timeout = 0; /* Don't time out */
3966 cmd->Request.CDB[0] = opcode;
3967 cmd->Request.CDB[1] = type;
3968 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3969
3970 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3971 cmd->ErrorDescriptor.Addr.upper = 0;
3972 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3973
3974 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3975
3976 for (i = 0; i < 10; i++) {
3977 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3978 if ((tag & ~3) == paddr32)
3979 break;
3980 schedule_timeout_uninterruptible(HZ);
3981 }
3982
3983 iounmap(vaddr);
3984
3985 /* we leak the DMA buffer here ... no choice since the controller could
3986 still complete the command. */
3987 if (i == 10) {
3988 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3989 opcode, type);
3990 return -ETIMEDOUT;
3991 }
3992
3993 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3994
3995 if (tag & 2) {
3996 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3997 opcode, type);
3998 return -EIO;
3999 }
4000
4001 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4002 opcode, type);
4003 return 0;
4004}
4005
4006#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4007#define cciss_noop(p) cciss_message(p, 3, 0)
4008
4009static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4010{
4011/* the #defines are stolen from drivers/pci/msi.h. */
4012#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4013#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4014
4015 int pos;
4016 u16 control = 0;
4017
4018 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4019 if (pos) {
4020 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4021 if (control & PCI_MSI_FLAGS_ENABLE) {
4022 printk(KERN_INFO "cciss: resetting MSI\n");
4023 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4024 }
4025 }
4026
4027 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4028 if (pos) {
4029 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4030 if (control & PCI_MSIX_FLAGS_ENABLE) {
4031 printk(KERN_INFO "cciss: resetting MSI-X\n");
4032 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4033 }
4034 }
4035
4036 return 0;
4037}
4038
4039/* This does a hard reset of the controller using PCI power management
4040 * states. */
4041static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4042{
4043 u16 pmcsr, saved_config_space[32];
4044 int i, pos;
4045
4046 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4047
4048 /* This is very nearly the same thing as
4049
4050 pci_save_state(pci_dev);
4051 pci_set_power_state(pci_dev, PCI_D3hot);
4052 pci_set_power_state(pci_dev, PCI_D0);
4053 pci_restore_state(pci_dev);
4054
4055 but we can't use these nice canned kernel routines on
4056 kexec, because they also check the MSI/MSI-X state in PCI
4057 configuration space and do the wrong thing when it is
4058 set/cleared. Also, the pci_save/restore_state functions
4059 violate the ordering requirements for restoring the
4060 configuration space from the CCISS document (see the
4061 comment below). So we roll our own .... */
4062
4063 for (i = 0; i < 32; i++)
4064 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4065
4066 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4067 if (pos == 0) {
4068 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4069 return -ENODEV;
4070 }
4071
4072 /* Quoting from the Open CISS Specification: "The Power
4073 * Management Control/Status Register (CSR) controls the power
4074 * state of the device. The normal operating state is D0,
4075 * CSR=00h. The software off state is D3, CSR=03h. To reset
4076 * the controller, place the interface device in D3 then to
4077 * D0, this causes a secondary PCI reset which will reset the
4078 * controller." */
4079
4080 /* enter the D3hot power management state */
4081 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4082 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4083 pmcsr |= PCI_D3hot;
4084 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4085
4086 schedule_timeout_uninterruptible(HZ >> 1);
4087
4088 /* enter the D0 power management state */
4089 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4090 pmcsr |= PCI_D0;
4091 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4092
4093 schedule_timeout_uninterruptible(HZ >> 1);
4094
4095 /* Restore the PCI configuration space. The Open CISS
4096 * Specification says, "Restore the PCI Configuration
4097 * Registers, offsets 00h through 60h. It is important to
4098 * restore the command register, 16-bits at offset 04h,
4099 * last. Do not restore the configuration status register,
4100 * 16-bits at offset 06h." Note that the offset is 2*i. */
4101 for (i = 0; i < 32; i++) {
4102 if (i == 2 || i == 3)
4103 continue;
4104 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4105 }
4106 wmb();
4107 pci_write_config_word(pdev, 4, saved_config_space[2]);
4108
4109 return 0;
4110}
4111
1da177e4
LT		 4112/*
4113 * This is it. Find all the controllers and register them. I really hate
4114 * stealing all these major device numbers.
4115 * returns the number of block devices registered.
4116 */
4117static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4118 const struct pci_device_id *ent)
1da177e4 4119{
1da177e4 4120 int i;
799202cb 4121 int j = 0;
5c07a311 4122 int k = 0;
1da177e4 4123 int rc;
22bece00 4124 int dac, return_code;
212a5026 4125 InquiryData_struct *inq_buff;
1da177e4 4126
82eb03cf
CC		 4127 if (reset_devices) {
4128 /* Reset the controller with a PCI power-cycle */
4129 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4130 return -ENODEV;
4131
5e18cfd0
JA		 4132 /* Now try to get the controller to respond to a no-op. Some
4133 devices (notably the HP Smart Array 5i Controller) need
4134 up to 30 seconds to respond. */
5e4c91c8 4135 for (i=0; i<30; i++) {
82eb03cf
CC		 4136 if (cciss_noop(pdev) == 0)
4137 break;
5e4c91c8
JA		 4138
4139 schedule_timeout_uninterruptible(HZ);
4140 }
4141 if (i == 30) {
4142 printk(KERN_ERR "cciss: controller seems dead\n");
4143 return -EBUSY;
82eb03cf
CC		 4144 }
4145 }
4146
1da177e4 4147 i = alloc_cciss_hba();
7c832835 4148 if (i < 0)
e2019b58 4149 return -1;
1f8ef380
MM		 4150
4151 hba[i]->busy_initializing = 1;
8a3173de
JA		 4152 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4153 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4154 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4155
1da177e4 4156 if (cciss_pci_init(hba[i], pdev) != 0)
2cfa948c 4157 goto clean_no_release_regions;
1da177e4
LT		 4158
4159 sprintf(hba[i]->devname, "cciss%d", i);
4160 hba[i]->ctlr = i;
4161 hba[i]->pdev = pdev;
4162
b368c9dd
AP		 4163 init_completion(&hba[i]->scan_wait);
4164
7fe06326
AP		 4165 if (cciss_create_hba_sysfs_entry(hba[i]))
4166 goto clean0;
4167
1da177e4 4168 /* configure PCI DMA stuff */
6a35528a 4169 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4170 dac = 1;
284901a9 4171 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4172 dac = 0;
1da177e4 4173 else {
40aabb58 4174 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4175 goto clean1;
4176 }
4177
4178 /*
4179 * register with the major number, or get a dynamic major number
4180 * by passing 0 as argument. This is done for greater than
4181 * 8 controller support.
4182 */
4183 if (i < MAX_CTLR_ORIG)
564de74a 4184 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4185 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4186 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4187 printk(KERN_ERR
7c832835
BH		 4188 "cciss: Unable to get major number %d for %s "
4189 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4190 goto clean1;
7c832835 4191 } else {
1da177e4
LT		 4192 if (i >= MAX_CTLR_ORIG)
4193 hba[i]->major = rc;
4194 }
4195
4196 /* make sure the board interrupts are off */
4197 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4198 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4199 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4200 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4201 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4202 goto clean2;
4203 }
40aabb58
BH		 4204
4205 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4206 hba[i]->devname, pdev->device, pci_name(pdev),
4207 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4208
4209 hba[i]->cmd_pool_bits =
061837bc
JL		 4210 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4211 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4212 hba[i]->cmd_pool = (CommandList_struct *)
4213 pci_alloc_consistent(hba[i]->pdev,
f880632f 4214 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4215 &(hba[i]->cmd_pool_dhandle));
4216 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4217 pci_alloc_consistent(hba[i]->pdev,
f880632f 4218 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4219 &(hba[i]->errinfo_pool_dhandle));
4220 if ((hba[i]->cmd_pool_bits == NULL)
4221 || (hba[i]->cmd_pool == NULL)
4222 || (hba[i]->errinfo_pool == NULL)) {
4223 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4224 goto clean4;
4225 }
5c07a311
DB		 4226
4227 /* Need space for temp scatter list */
4228 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4229 sizeof(struct scatterlist *),
4230 GFP_KERNEL);
4231 for (k = 0; k < hba[i]->nr_cmds; k++) {
4232 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4233 hba[i]->maxsgentries,
4234 GFP_KERNEL);
4235 if (hba[i]->scatter_list[k] == NULL) {
4236 printk(KERN_ERR "cciss%d: could not allocate "
4237 "s/g lists\n", i);
4238 goto clean4;
4239 }
4240 }
4241 hba[i]->cmd_sg_list = kmalloc(sizeof(struct Cmd_sg_list *) *
4242 hba[i]->nr_cmds,
4243 GFP_KERNEL);
4244 if (!hba[i]->cmd_sg_list) {
4245 printk(KERN_ERR "cciss%d: Cannot get memory for "
4246 "s/g chaining.\n", i);
4247 goto clean4;
4248 }
4249 /* Build up chain blocks for each command */
4250 if (hba[i]->chainsize > 0) {
4251 for (j = 0; j < hba[i]->nr_cmds; j++) {
4252 hba[i]->cmd_sg_list[j] =
4253 kmalloc(sizeof(struct Cmd_sg_list),
4254 GFP_KERNEL);
4255 if (!hba[i]->cmd_sg_list[j]) {
4256 printk(KERN_ERR "cciss%d: Cannot get memory "
4257 "for chain block.\n", i);
4258 goto clean4;
4259 }
4260 /* Need a block of chainsized s/g elements. */
4261 hba[i]->cmd_sg_list[j]->sgchain =
4262 kmalloc((hba[i]->chainsize *
4263 sizeof(SGDescriptor_struct)),
4264 GFP_KERNEL);
4265 if (!hba[i]->cmd_sg_list[j]->sgchain) {
4266 printk(KERN_ERR "cciss%d: Cannot get memory "
4267 "for s/g chains\n", i);
4268 goto clean4;
4269 }
4270 }
4271 }
4272
1da177e4 4273 spin_lock_init(&hba[i]->lock);
1da177e4 4274
7c832835
BH		 4275 /* Initialize the pdev driver private data.
4276 have it point to hba[i]. */
1da177e4 4277 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4278 /* command and error info recs zeroed out before
4279 they are used */
4280 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4281 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4282 * sizeof(unsigned long));
1da177e4 4283
6ae5ce8e
MM		 4284 hba[i]->num_luns = 0;
4285 hba[i]->highest_lun = -1;
4286 for (j = 0; j < CISS_MAX_LUN; j++) {
9cef0d2f 4287 hba[i]->drv[j] = NULL;
6ae5ce8e
MM		 4288 hba[i]->gendisk[j] = NULL;
4289 }
1da177e4
LT		 4290
4291 cciss_scsi_setup(i);
4292
4293 /* Turn the interrupts on so we can service requests */
4294 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4295
22bece00
MM		 4296 /* Get the firmware version */
4297 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4298 if (inq_buff == NULL) {
4299 printk(KERN_ERR "cciss: out of memory\n");
4300 goto clean4;
4301 }
4302
4303 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4304 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4305 if (return_code == IO_OK) {
4306 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4307 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4308 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4309 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4310 } else { /* send command failed */
4311 printk(KERN_WARNING "cciss: unable to determine firmware"
4312 " version of controller\n");
4313 }
212a5026 4314 kfree(inq_buff);
22bece00 4315
1da177e4 4316 cciss_procinit(i);
92c4231a 4317
5c07a311 4318 hba[i]->cciss_max_sectors = 8192;
92c4231a 4319
2d11d993 4320 rebuild_lun_table(hba[i], 1, 0);
d6dbf42e 4321 hba[i]->busy_initializing = 0;
e2019b58 4322 return 1;
1da177e4 4323
6ae5ce8e 4324clean4:
6044ec88 4325 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4326 /* Free up sg elements */
4327 for (k = 0; k < hba[i]->nr_cmds; k++)
4328 kfree(hba[i]->scatter_list[k]);
4329 kfree(hba[i]->scatter_list);
d61c4269
SC		 4330 /* Only free up extra s/g lists if controller supports them */
4331 if (hba[i]->chainsize > 0) {
4332 for (j = 0; j < hba[i]->nr_cmds; j++) {
4333 if (hba[i]->cmd_sg_list[j]) {
4334 kfree(hba[i]->cmd_sg_list[j]->sgchain);
4335 kfree(hba[i]->cmd_sg_list[j]);
4336 }
4337 }
4338 kfree(hba[i]->cmd_sg_list);
5c07a311 4339 }
7c832835 4340 if (hba[i]->cmd_pool)
1da177e4 4341 pci_free_consistent(hba[i]->pdev,
f880632f 4342 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4343 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4344 if (hba[i]->errinfo_pool)
1da177e4 4345 pci_free_consistent(hba[i]->pdev,
f880632f 4346 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4347 hba[i]->errinfo_pool,
4348 hba[i]->errinfo_pool_dhandle);
fb86a35b 4349 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4350clean2:
1da177e4 4351 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4352clean1:
7fe06326
AP		 4353 cciss_destroy_hba_sysfs_entry(hba[i]);
4354clean0:
2cfa948c
SC		 4355 pci_release_regions(pdev);
4356clean_no_release_regions:
1f8ef380 4357 hba[i]->busy_initializing = 0;
9cef0d2f 4358
872225ca
MM		 4359 /*
4360 * Deliberately omit pci_disable_device(): it does something nasty to
4361 * Smart Array controllers that pci_enable_device does not undo
4362 */
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 4369{
29009a03
SC		 4370 ctlr_info_t *h;
4371 char *flush_buf;
7c832835 4372 int return_code;
1da177e4 4373
29009a03
SC		 4374 h = pci_get_drvdata(pdev);
4375 flush_buf = kzalloc(4, GFP_KERNEL);
4376 if (!flush_buf) {
4377 printk(KERN_WARNING
4378 "cciss:%d cache not flushed, out of memory.\n",
4379 h->ctlr);
e9ca75b5 4380 return;
e9ca75b5 4381 }
29009a03
SC		 4382 /* write all data in the battery backed cache to disk */
4383 memset(flush_buf, 0, 4);
4384 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4385 4, 0, CTLR_LUNID, TYPE_CMD);
4386 kfree(flush_buf);
4387 if (return_code != IO_OK)
4388 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4389 h->ctlr);
4390 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4391 free_irq(h->intr[2], h);
e9ca75b5
GB		 4392}
4393
4394static void __devexit cciss_remove_one(struct pci_dev *pdev)
4395{
4396 ctlr_info_t *tmp_ptr;
4397 int i, j;
4398
7c832835
BH		 4399 if (pci_get_drvdata(pdev) == NULL) {
4400 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4401 return;
4402 }
0a9279cc 4403
1da177e4
LT		 4404 tmp_ptr = pci_get_drvdata(pdev);
4405 i = tmp_ptr->ctlr;
7c832835 4406 if (hba[i] == NULL) {
1da177e4 4407 printk(KERN_ERR "cciss: device appears to "
7c832835 4408 "already be removed \n");
1da177e4
LT		 4409 return;
4410 }
b6550777 4411
b368c9dd 4412 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4413
b368c9dd 4414 remove_from_scan_list(hba[i]);
b6550777
BH		 4415 remove_proc_entry(hba[i]->devname, proc_cciss);
4416 unregister_blkdev(hba[i]->major, hba[i]->devname);
4417
4418 /* remove it from the disk list */
4419 for (j = 0; j < CISS_MAX_LUN; j++) {
4420 struct gendisk *disk = hba[i]->gendisk[j];
4421 if (disk) {
165125e1 4422 struct request_queue *q = disk->queue;
b6550777 4423
097d0264 4424 if (disk->flags & GENHD_FL_UP) {
8ce51966 4425 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4426 del_gendisk(disk);
097d0264 4427 }
b6550777
BH		 4428 if (q)
4429 blk_cleanup_queue(q);
4430 }
4431 }
4432
ba198efb 4433#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4434 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4435#endif
b6550777 4436
e9ca75b5 4437 cciss_shutdown(pdev);
fb86a35b
MM		 4438
4439#ifdef CONFIG_PCI_MSI
7c832835
BH		 4440 if (hba[i]->msix_vector)
4441 pci_disable_msix(hba[i]->pdev);
4442 else if (hba[i]->msi_vector)
4443 pci_disable_msi(hba[i]->pdev);
4444#endif /* CONFIG_PCI_MSI */
fb86a35b 4445
1da177e4 4446 iounmap(hba[i]->vaddr);
1da177e4 4447
f880632f 4448 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4449 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4450 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4451 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4452 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4453 /* Free up sg elements */
4454 for (j = 0; j < hba[i]->nr_cmds; j++)
4455 kfree(hba[i]->scatter_list[j]);
4456 kfree(hba[i]->scatter_list);
d61c4269
SC		 4457 /* Only free up extra s/g lists if controller supports them */
4458 if (hba[i]->chainsize > 0) {
4459 for (j = 0; j < hba[i]->nr_cmds; j++) {
4460 if (hba[i]->cmd_sg_list[j]) {
4461 kfree(hba[i]->cmd_sg_list[j]->sgchain);
4462 kfree(hba[i]->cmd_sg_list[j]);
4463 }
4464 }
4465 kfree(hba[i]->cmd_sg_list);
5c07a311 4466 }
872225ca
MM		 4467 /*
4468 * Deliberately omit pci_disable_device(): it does something nasty to
4469 * Smart Array controllers that pci_enable_device does not undo
4470 */
7c832835 4471 pci_release_regions(pdev);
4e570309 4472 pci_set_drvdata(pdev, NULL);
7fe06326 4473 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4474 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4475 free_hba(i);
7c832835 4476}
1da177e4
LT		 4477
4478static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4479 .name = "cciss",
4480 .probe = cciss_init_one,
4481 .remove = __devexit_p(cciss_remove_one),
4482 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4483 .shutdown = cciss_shutdown,
1da177e4
LT		 4484};
4485
4486/*
4487 * This is it. Register the PCI driver information for the cards we control
7c832835 4488 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4489 */
4490static int __init cciss_init(void)
4491{
7fe06326
AP		 4492 int err;
4493
10cbda97
JA		 4494 /*
4495 * The hardware requires that commands are aligned on a 64-bit
4496 * boundary. Given that we use pci_alloc_consistent() to allocate an
4497 * array of them, the size must be a multiple of 8 bytes.
4498 */
4499 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4500
1da177e4
LT		 4501 printk(KERN_INFO DRIVER_NAME "\n");
4502
7fe06326
AP		 4503 err = bus_register(&cciss_bus_type);
4504 if (err)
4505 return err;
4506
b368c9dd
AP		 4507 /* Start the scan thread */
4508 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4509 if (IS_ERR(cciss_scan_thread)) {
4510 err = PTR_ERR(cciss_scan_thread);
4511 goto err_bus_unregister;
4512 }
4513
1da177e4 4514 /* Register for our PCI devices */
7fe06326
AP		 4515 err = pci_register_driver(&cciss_pci_driver);
4516 if (err)
b368c9dd 4517 goto err_thread_stop;
7fe06326 4518
617e1344 4519 return err;
7fe06326 4520
b368c9dd
AP		 4521err_thread_stop:
4522 kthread_stop(cciss_scan_thread);
4523err_bus_unregister:
7fe06326 4524 bus_unregister(&cciss_bus_type);
b368c9dd 4525
7fe06326 4526 return err;
1da177e4
LT		 4527}
4528
4529static void __exit cciss_cleanup(void)
4530{
4531 int i;
4532
4533 pci_unregister_driver(&cciss_pci_driver);
4534 /* double check that all controller entrys have been removed */
7c832835
BH		 4535 for (i = 0; i < MAX_CTLR; i++) {
4536 if (hba[i] != NULL) {
1da177e4 4537 printk(KERN_WARNING "cciss: had to remove"
7c832835 4538 " controller %d\n", i);
1da177e4
LT		 4539 cciss_remove_one(hba[i]->pdev);
4540 }
4541 }
b368c9dd 4542 kthread_stop(cciss_scan_thread);
928b4d8c 4543 remove_proc_entry("driver/cciss", NULL);
7fe06326 4544 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4545}
4546
33079b21
MM		 4547static void fail_all_cmds(unsigned long ctlr)
4548{
4549 /* If we get here, the board is apparently dead. */
4550 ctlr_info_t *h = hba[ctlr];
4551 CommandList_struct *c;
4552 unsigned long flags;
4553
4554 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4555 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4556
4557 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4558
7c832835 4559 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4560
4561 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4562 while (!hlist_empty(&h->reqQ)) {
4563 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4564 removeQ(c);
33079b21 4565 h->Qdepth--;
8a3173de 4566 addQ(&h->cmpQ, c);
33079b21
MM		 4567 }
4568
4569 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4570 while (!hlist_empty(&h->cmpQ)) {
4571 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4572 removeQ(c);
b59e64d0
HR		 4573 if (c->cmd_type != CMD_MSG_STALE)
4574 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4575 if (c->cmd_type == CMD_RWREQ) {
4576 complete_command(h, c, 0);
4577 } else if (c->cmd_type == CMD_IOCTL_PEND)
4578 complete(c->waiting);
4579#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4580 else if (c->cmd_type == CMD_SCSI)
4581 complete_scsi_command(c, 0, 0);
33079b21
MM		 4582#endif
4583 }
4584 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4585 return;
4586}
4587
1da177e4
LT		 4588module_init(cciss_init);
4589module_exit(cciss_cleanup);
Linux kernel - Deliverables
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