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cciss: Rearrange logical drive sysfs code to make the "changing a disk" path work.
[deliverable/linux.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68MODULE_VERSION("3.6.20");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
71#include "cciss_cmd.h"
72#include "cciss.h"
73#include <linux/cciss_ioctl.h>
74
75/* define the PCI info for the cards we can control */
76static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 104 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
105 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 106 {0,}
107};
7c832835 108
1da177e4
LT		 109MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
110
1da177e4
LT		 111/* board_id = Subsystem Device ID & Vendor ID
112 * product = Marketing Name for the board
7c832835 113 * access = Address of the struct of function pointers
1da177e4
LT		 114 */
115static struct board_type products[] = {
49153998
MM		 116 {0x40700E11, "Smart Array 5300", &SA5_access},
117 {0x40800E11, "Smart Array 5i", &SA5B_access},
118 {0x40820E11, "Smart Array 532", &SA5B_access},
119 {0x40830E11, "Smart Array 5312", &SA5B_access},
120 {0x409A0E11, "Smart Array 641", &SA5_access},
121 {0x409B0E11, "Smart Array 642", &SA5_access},
122 {0x409C0E11, "Smart Array 6400", &SA5_access},
123 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
124 {0x40910E11, "Smart Array 6i", &SA5_access},
125 {0x3225103C, "Smart Array P600", &SA5_access},
126 {0x3223103C, "Smart Array P800", &SA5_access},
127 {0x3234103C, "Smart Array P400", &SA5_access},
128 {0x3235103C, "Smart Array P400i", &SA5_access},
129 {0x3211103C, "Smart Array E200i", &SA5_access},
130 {0x3212103C, "Smart Array E200", &SA5_access},
131 {0x3213103C, "Smart Array E200i", &SA5_access},
132 {0x3214103C, "Smart Array E200i", &SA5_access},
133 {0x3215103C, "Smart Array E200i", &SA5_access},
134 {0x3237103C, "Smart Array E500", &SA5_access},
135 {0x323D103C, "Smart Array P700m", &SA5_access},
136 {0x3241103C, "Smart Array P212", &SA5_access},
137 {0x3243103C, "Smart Array P410", &SA5_access},
138 {0x3245103C, "Smart Array P410i", &SA5_access},
139 {0x3247103C, "Smart Array P411", &SA5_access},
140 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 141 {0x324A103C, "Smart Array P712m", &SA5_access},
142 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 143 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 144};
145
d14c4ab5 146/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 147#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 148#define MAX_IOCTL_CONFIG_WAIT 1000
149
150/*define how many times we will try a command because of bus resets */
151#define MAX_CMD_RETRIES 3
152
1da177e4
LT		 153#define MAX_CTLR 32
154
155/* Originally cciss driver only supports 8 major numbers */
156#define MAX_CTLR_ORIG 8
157
1da177e4
LT		 158static ctlr_info_t *hba[MAX_CTLR];
159
b368c9dd
AP		 160static struct task_struct *cciss_scan_thread;
161static DEFINE_MUTEX(scan_mutex);
162static LIST_HEAD(scan_q);
163
165125e1 164static void do_cciss_request(struct request_queue *q);
7d12e780 165static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 166static int cciss_open(struct block_device *bdev, fmode_t mode);
167static int cciss_release(struct gendisk *disk, fmode_t mode);
168static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 169 unsigned int cmd, unsigned long arg);
a885c8c4 170static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 171
1da177e4 172static int cciss_revalidate(struct gendisk *disk);
6ae5ce8e 173static int rebuild_lun_table(ctlr_info_t *h, int first_time);
a0ea8622 174static int deregister_disk(ctlr_info_t *h, int drv_index,
7c832835 175 int clear_all);
1da177e4 176
00988a35
MMOD		 177static void cciss_read_capacity(int ctlr, int logvol, int withirq,
178 sector_t *total_size, unsigned int *block_size);
179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
180 sector_t *total_size, unsigned int *block_size);
181static void cciss_geometry_inquiry(int ctlr, int logvol,
182 int withirq, sector_t total_size,
183 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 184 drive_info_struct *drv);
7c832835
BH		 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
186 __u32);
187static void start_io(ctlr_info_t *h);
188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 191 __u8 page_code, unsigned char scsi3addr[],
192 int cmd_type);
85cc61ae 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
194 int attempt_retry);
195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 196
33079b21 197static void fail_all_cmds(unsigned long ctlr);
d6f4965d 198static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 199static int scan_thread(void *data);
200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 201static void cciss_hba_release(struct device *dev);
202static void cciss_device_release(struct device *dev);
33079b21 203
1da177e4 204#ifdef CONFIG_PROC_FS
1da177e4
LT		 205static void cciss_procinit(int i);
206#else
7c832835
BH		 207static void cciss_procinit(int i)
208{
209}
210#endif /* CONFIG_PROC_FS */
1da177e4
LT		 211
212#ifdef CONFIG_COMPAT
ef7822c2
AV		 213static int cciss_compat_ioctl(struct block_device *, fmode_t,
214 unsigned, unsigned long);
1da177e4
LT		 215#endif
216
83d5cde4 217static const struct block_device_operations cciss_fops = {
7c832835 218 .owner = THIS_MODULE,
ef7822c2
AV		 219 .open = cciss_open,
220 .release = cciss_release,
221 .locked_ioctl = cciss_ioctl,
7c832835 222 .getgeo = cciss_getgeo,
1da177e4 223#ifdef CONFIG_COMPAT
ef7822c2 224 .compat_ioctl = cciss_compat_ioctl,
1da177e4 225#endif
7c832835 226 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 227};
228
229/*
230 * Enqueuing and dequeuing functions for cmdlists.
231 */
8a3173de 232static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 233{
8a3173de 234 hlist_add_head(&c->list, list);
1da177e4
LT		 235}
236
8a3173de 237static inline void removeQ(CommandList_struct *c)
1da177e4 238{
b59e64d0
HR		 239 /*
240 * After kexec/dump some commands might still
241 * be in flight, which the firmware will try
242 * to complete. Resetting the firmware doesn't work
243 * with old fw revisions, so we have to mark
244 * them off as 'stale' to prevent the driver from
245 * falling over.
246 */
247 if (WARN_ON(hlist_unhashed(&c->list))) {
248 c->cmd_type = CMD_MSG_STALE;
8a3173de 249 return;
b59e64d0 250 }
8a3173de
JA		 251
252 hlist_del_init(&c->list);
1da177e4
LT		 253}
254
255#include "cciss_scsi.c" /* For SCSI tape support */
256
0f5486ec
RD		 257#define RAID_UNKNOWN 6
258
1da177e4
LT		 259#ifdef CONFIG_PROC_FS
260
261/*
262 * Report information about this controller.
263 */
264#define ENG_GIG 1000000000
265#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 266#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 267static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
268 "UNKNOWN"
269};
1da177e4
LT		 270
271static struct proc_dir_entry *proc_cciss;
272
89b6e743 273static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 274{
89b6e743
MM		 275 ctlr_info_t *h = seq->private;
276
277 seq_printf(seq, "%s: HP %s Controller\n"
278 "Board ID: 0x%08lx\n"
279 "Firmware Version: %c%c%c%c\n"
280 "IRQ: %d\n"
281 "Logical drives: %d\n"
282 "Current Q depth: %d\n"
283 "Current # commands on controller: %d\n"
284 "Max Q depth since init: %d\n"
285 "Max # commands on controller since init: %d\n"
286 "Max SG entries since init: %d\n",
287 h->devname,
288 h->product_name,
289 (unsigned long)h->board_id,
290 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
291 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
292 h->num_luns,
293 h->Qdepth, h->commands_outstanding,
294 h->maxQsinceinit, h->max_outstanding, h->maxSG);
295
296#ifdef CONFIG_CISS_SCSI_TAPE
297 cciss_seq_tape_report(seq, h->ctlr);
298#endif /* CONFIG_CISS_SCSI_TAPE */
299}
1da177e4 300
89b6e743
MM		 301static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
302{
303 ctlr_info_t *h = seq->private;
304 unsigned ctlr = h->ctlr;
305 unsigned long flags;
1da177e4
LT		 306
307 /* prevent displaying bogus info during configuration
308 * or deconfiguration of a logical volume
309 */
310 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
311 if (h->busy_configuring) {
312 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 313 return ERR_PTR(-EBUSY);
1da177e4
LT		 314 }
315 h->busy_configuring = 1;
316 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
317
89b6e743
MM		 318 if (*pos == 0)
319 cciss_seq_show_header(seq);
320
321 return pos;
322}
323
324static int cciss_seq_show(struct seq_file *seq, void *v)
325{
326 sector_t vol_sz, vol_sz_frac;
327 ctlr_info_t *h = seq->private;
328 unsigned ctlr = h->ctlr;
329 loff_t *pos = v;
330 drive_info_struct *drv = &h->drv[*pos];
331
332 if (*pos > h->highest_lun)
333 return 0;
334
335 if (drv->heads == 0)
336 return 0;
337
338 vol_sz = drv->nr_blocks;
339 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
340 vol_sz_frac *= 100;
341 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
342
343 if (drv->raid_level > 5)
344 drv->raid_level = RAID_UNKNOWN;
345 seq_printf(seq, "cciss/c%dd%d:"
346 "\t%4u.%02uGB\tRAID %s\n",
347 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
348 raid_label[drv->raid_level]);
349 return 0;
350}
351
352static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
353{
354 ctlr_info_t *h = seq->private;
355
356 if (*pos > h->highest_lun)
357 return NULL;
358 *pos += 1;
359
360 return pos;
361}
362
363static void cciss_seq_stop(struct seq_file *seq, void *v)
364{
365 ctlr_info_t *h = seq->private;
366
367 /* Only reset h->busy_configuring if we succeeded in setting
368 * it during cciss_seq_start. */
369 if (v == ERR_PTR(-EBUSY))
370 return;
7c832835 371
1da177e4 372 h->busy_configuring = 0;
1da177e4
LT		 373}
374
88e9d34c 375static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 376 .start = cciss_seq_start,
377 .show = cciss_seq_show,
378 .next = cciss_seq_next,
379 .stop = cciss_seq_stop,
380};
381
382static int cciss_seq_open(struct inode *inode, struct file *file)
383{
384 int ret = seq_open(file, &cciss_seq_ops);
385 struct seq_file *seq = file->private_data;
386
387 if (!ret)
388 seq->private = PDE(inode)->data;
389
390 return ret;
391}
392
393static ssize_t
394cciss_proc_write(struct file *file, const char __user *buf,
395 size_t length, loff_t *ppos)
1da177e4 396{
89b6e743
MM		 397 int err;
398 char *buffer;
399
400#ifndef CONFIG_CISS_SCSI_TAPE
401 return -EINVAL;
1da177e4
LT		 402#endif
403
89b6e743 404 if (!buf || length > PAGE_SIZE - 1)
7c832835 405 return -EINVAL;
89b6e743
MM		 406
407 buffer = (char *)__get_free_page(GFP_KERNEL);
408 if (!buffer)
409 return -ENOMEM;
410
411 err = -EFAULT;
412 if (copy_from_user(buffer, buf, length))
413 goto out;
414 buffer[length] = '\0';
415
416#ifdef CONFIG_CISS_SCSI_TAPE
417 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
418 struct seq_file *seq = file->private_data;
419 ctlr_info_t *h = seq->private;
420 int rc;
421
7c832835
BH		 422 rc = cciss_engage_scsi(h->ctlr);
423 if (rc != 0)
89b6e743
MM		 424 err = -rc;
425 else
426 err = length;
427 } else
428#endif /* CONFIG_CISS_SCSI_TAPE */
429 err = -EINVAL;
7c832835
BH		 430 /* might be nice to have "disengage" too, but it's not
431 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 432
433out:
434 free_page((unsigned long)buffer);
435 return err;
1da177e4
LT		 436}
437
89b6e743
MM		 438static struct file_operations cciss_proc_fops = {
439 .owner = THIS_MODULE,
440 .open = cciss_seq_open,
441 .read = seq_read,
442 .llseek = seq_lseek,
443 .release = seq_release,
444 .write = cciss_proc_write,
445};
446
1da177e4
LT		 447static void __devinit cciss_procinit(int i)
448{
449 struct proc_dir_entry *pde;
450
89b6e743 451 if (proc_cciss == NULL)
928b4d8c 452 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 453 if (!proc_cciss)
454 return;
3dfcf9c4 455 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 456 S_IROTH, proc_cciss,
3dfcf9c4 457 &cciss_proc_fops, hba[i]);
1da177e4 458}
7c832835 459#endif /* CONFIG_PROC_FS */
1da177e4 460
7fe06326
AP		 461#define MAX_PRODUCT_NAME_LEN 19
462
463#define to_hba(n) container_of(n, struct ctlr_info, dev)
7fe06326 464
d6f4965d
AP		 465static ssize_t host_store_rescan(struct device *dev,
466 struct device_attribute *attr,
467 const char *buf, size_t count)
468{
469 struct ctlr_info *h = to_hba(dev);
470
471 add_to_scan_list(h);
472 wake_up_process(cciss_scan_thread);
473 wait_for_completion_interruptible(&h->scan_wait);
474
475 return count;
476}
477DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 478
479static ssize_t dev_show_unique_id(struct device *dev,
480 struct device_attribute *attr,
481 char *buf)
482{
617e1344
SC		 483 drive_info_struct *drv = dev_get_drvdata(dev);
484 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 485 __u8 sn[16];
486 unsigned long flags;
487 int ret = 0;
488
489 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
490 if (h->busy_configuring)
491 ret = -EBUSY;
492 else
493 memcpy(sn, drv->serial_no, sizeof(sn));
494 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
495
496 if (ret)
497 return ret;
498 else
499 return snprintf(buf, 16 * 2 + 2,
500 "%02X%02X%02X%02X%02X%02X%02X%02X"
501 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
502 sn[0], sn[1], sn[2], sn[3],
503 sn[4], sn[5], sn[6], sn[7],
504 sn[8], sn[9], sn[10], sn[11],
505 sn[12], sn[13], sn[14], sn[15]);
506}
507DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
508
509static ssize_t dev_show_vendor(struct device *dev,
510 struct device_attribute *attr,
511 char *buf)
512{
617e1344
SC		 513 drive_info_struct *drv = dev_get_drvdata(dev);
514 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 515 char vendor[VENDOR_LEN + 1];
516 unsigned long flags;
517 int ret = 0;
518
519 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
520 if (h->busy_configuring)
521 ret = -EBUSY;
522 else
523 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
524 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
525
526 if (ret)
527 return ret;
528 else
529 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
530}
531DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
532
533static ssize_t dev_show_model(struct device *dev,
534 struct device_attribute *attr,
535 char *buf)
536{
617e1344
SC		 537 drive_info_struct *drv = dev_get_drvdata(dev);
538 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 539 char model[MODEL_LEN + 1];
540 unsigned long flags;
541 int ret = 0;
542
543 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
544 if (h->busy_configuring)
545 ret = -EBUSY;
546 else
547 memcpy(model, drv->model, MODEL_LEN + 1);
548 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
549
550 if (ret)
551 return ret;
552 else
553 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
554}
555DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
556
557static ssize_t dev_show_rev(struct device *dev,
558 struct device_attribute *attr,
559 char *buf)
560{
617e1344
SC		 561 drive_info_struct *drv = dev_get_drvdata(dev);
562 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 563 char rev[REV_LEN + 1];
564 unsigned long flags;
565 int ret = 0;
566
567 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
568 if (h->busy_configuring)
569 ret = -EBUSY;
570 else
571 memcpy(rev, drv->rev, REV_LEN + 1);
572 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
573
574 if (ret)
575 return ret;
576 else
577 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
578}
579DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
580
d6f4965d
AP		 581static struct attribute *cciss_host_attrs[] = {
582 &dev_attr_rescan.attr,
583 NULL
584};
585
586static struct attribute_group cciss_host_attr_group = {
587 .attrs = cciss_host_attrs,
588};
589
590static struct attribute_group *cciss_host_attr_groups[] = {
591 &cciss_host_attr_group,
592 NULL
593};
594
595static struct device_type cciss_host_type = {
596 .name = "cciss_host",
597 .groups = cciss_host_attr_groups,
617e1344 598 .release = cciss_hba_release,
d6f4965d
AP		 599};
600
7fe06326
AP		 601static struct attribute *cciss_dev_attrs[] = {
602 &dev_attr_unique_id.attr,
603 &dev_attr_model.attr,
604 &dev_attr_vendor.attr,
605 &dev_attr_rev.attr,
606 NULL
607};
608
609static struct attribute_group cciss_dev_attr_group = {
610 .attrs = cciss_dev_attrs,
611};
612
a4dbd674 613static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 614 &cciss_dev_attr_group,
615 NULL
616};
617
618static struct device_type cciss_dev_type = {
619 .name = "cciss_device",
620 .groups = cciss_dev_attr_groups,
617e1344 621 .release = cciss_device_release,
7fe06326
AP		 622};
623
624static struct bus_type cciss_bus_type = {
625 .name = "cciss",
626};
627
617e1344
SC		 628/*
629 * cciss_hba_release is called when the reference count
630 * of h->dev goes to zero.
631 */
632static void cciss_hba_release(struct device *dev)
633{
634 /*
635 * nothing to do, but need this to avoid a warning
636 * about not having a release handler from lib/kref.c.
637 */
638}
7fe06326
AP		 639
640/*
641 * Initialize sysfs entry for each controller. This sets up and registers
642 * the 'cciss#' directory for each individual controller under
643 * /sys/bus/pci/devices/<dev>/.
644 */
645static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
646{
647 device_initialize(&h->dev);
648 h->dev.type = &cciss_host_type;
649 h->dev.bus = &cciss_bus_type;
650 dev_set_name(&h->dev, "%s", h->devname);
651 h->dev.parent = &h->pdev->dev;
652
653 return device_add(&h->dev);
654}
655
656/*
657 * Remove sysfs entries for an hba.
658 */
659static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
660{
661 device_del(&h->dev);
617e1344
SC		 662 put_device(&h->dev); /* final put. */
663}
664
665/* cciss_device_release is called when the reference count
666 * of h->drv[x].dev goes to zero.
667 */
668static void cciss_device_release(struct device *dev)
669{
670 kfree(dev);
7fe06326
AP		 671}
672
673/*
674 * Initialize sysfs for each logical drive. This sets up and registers
675 * the 'c#d#' directory for each individual logical drive under
676 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
677 * /sys/block/cciss!c#d# to this entry.
678 */
617e1344 679static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 680 int drv_index)
681{
617e1344
SC		 682 struct device *dev;
683
684 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
685 if (!dev)
686 return -ENOMEM;
687 device_initialize(dev);
688 dev->type = &cciss_dev_type;
689 dev->bus = &cciss_bus_type;
690 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
691 dev->parent = &h->dev;
692 h->drv[drv_index].dev = dev;
693 dev_set_drvdata(dev, &h->drv[drv_index]);
694 return device_add(dev);
7fe06326
AP		 695}
696
697/*
698 * Remove sysfs entries for a logical drive.
699 */
617e1344 700static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index)
7fe06326 701{
617e1344
SC		 702 struct device *dev = h->drv[drv_index].dev;
703 device_del(dev);
704 put_device(dev); /* the "final" put. */
705 h->drv[drv_index].dev = NULL;
7fe06326
AP		 706}
707
7c832835
BH		 708/*
709 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 710 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 711 * which ones are free or in use. For operations that can wait for kmalloc
712 * to possible sleep, this routine can be called with get_from_pool set to 0.
713 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
714 */
715static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 716{
717 CommandList_struct *c;
7c832835 718 int i;
1da177e4
LT		 719 u64bit temp64;
720 dma_addr_t cmd_dma_handle, err_dma_handle;
721
7c832835
BH		 722 if (!get_from_pool) {
723 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
724 sizeof(CommandList_struct), &cmd_dma_handle);
725 if (c == NULL)
726 return NULL;
1da177e4
LT		 727 memset(c, 0, sizeof(CommandList_struct));
728
33079b21
MM		 729 c->cmdindex = -1;
730
7c832835
BH		 731 c->err_info = (ErrorInfo_struct *)
732 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
733 &err_dma_handle);
734
735 if (c->err_info == NULL) {
736 pci_free_consistent(h->pdev,
1da177e4
LT		 737 sizeof(CommandList_struct), c, cmd_dma_handle);
738 return NULL;
739 }
740 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 741 } else { /* get it out of the controllers pool */
742
743 do {
f880632f
MM		 744 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
745 if (i == h->nr_cmds)
7c832835
BH		 746 return NULL;
747 } while (test_and_set_bit
748 (i & (BITS_PER_LONG - 1),
749 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 750#ifdef CCISS_DEBUG
751 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
752#endif
7c832835 753 c = h->cmd_pool + i;
1da177e4 754 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 755 cmd_dma_handle = h->cmd_pool_dhandle
756 + i * sizeof(CommandList_struct);
1da177e4
LT		 757 c->err_info = h->errinfo_pool + i;
758 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 759 err_dma_handle = h->errinfo_pool_dhandle
760 + i * sizeof(ErrorInfo_struct);
761 h->nr_allocs++;
33079b21
MM		 762
763 c->cmdindex = i;
7c832835 764 }
1da177e4 765
8a3173de 766 INIT_HLIST_NODE(&c->list);
1da177e4 767 c->busaddr = (__u32) cmd_dma_handle;
7c832835 768 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 769 c->ErrDesc.Addr.lower = temp64.val32.lower;
770 c->ErrDesc.Addr.upper = temp64.val32.upper;
771 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 772
7c832835
BH		 773 c->ctlr = h->ctlr;
774 return c;
1da177e4
LT		 775}
776
7c832835
BH		 777/*
778 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 779 */
780static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
781{
782 int i;
783 u64bit temp64;
784
7c832835 785 if (!got_from_pool) {
1da177e4
LT		 786 temp64.val32.lower = c->ErrDesc.Addr.lower;
787 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 788 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
789 c->err_info, (dma_addr_t) temp64.val);
790 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
791 c, (dma_addr_t) c->busaddr);
792 } else {
1da177e4 793 i = c - h->cmd_pool;
7c832835
BH		 794 clear_bit(i & (BITS_PER_LONG - 1),
795 h->cmd_pool_bits + (i / BITS_PER_LONG));
796 h->nr_frees++;
797 }
1da177e4
LT		 798}
799
800static inline ctlr_info_t *get_host(struct gendisk *disk)
801{
7c832835 802 return disk->queue->queuedata;
1da177e4
LT		 803}
804
805static inline drive_info_struct *get_drv(struct gendisk *disk)
806{
807 return disk->private_data;
808}
809
810/*
811 * Open. Make sure the device is really there.
812 */
ef7822c2 813static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 814{
ef7822c2
AV		 815 ctlr_info_t *host = get_host(bdev->bd_disk);
816 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 817
818#ifdef CCISS_DEBUG
ef7822c2 819 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 820#endif /* CCISS_DEBUG */
1da177e4 821
ddd47442
MM		 822 if (host->busy_initializing || drv->busy_configuring)
823 return -EBUSY;
1da177e4
LT		 824 /*
825 * Root is allowed to open raw volume zero even if it's not configured
826 * so array config can still work. Root is also allowed to open any
827 * volume that has a LUN ID, so it can issue IOCTL to reread the
828 * disk information. I don't think I really like this
829 * but I'm already using way to many device nodes to claim another one
830 * for "raw controller".
831 */
7a06f789 832 if (drv->heads == 0) {
ef7822c2 833 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 834 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 835 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 836 return -ENXIO;
1da177e4
LT		 837 /* if it is, make sure we have a LUN ID */
838 } else if (drv->LunID == 0) {
839 return -ENXIO;
840 }
841 }
842 if (!capable(CAP_SYS_ADMIN))
843 return -EPERM;
844 }
845 drv->usage_count++;
846 host->usage_count++;
847 return 0;
848}
7c832835 849
1da177e4
LT		 850/*
851 * Close. Sync first.
852 */
ef7822c2 853static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 854{
ef7822c2
AV		 855 ctlr_info_t *host = get_host(disk);
856 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 857
858#ifdef CCISS_DEBUG
ef7822c2 859 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 860#endif /* CCISS_DEBUG */
1da177e4
LT		 861
862 drv->usage_count--;
863 host->usage_count--;
864 return 0;
865}
866
867#ifdef CONFIG_COMPAT
868
ef7822c2
AV		 869static int do_ioctl(struct block_device *bdev, fmode_t mode,
870 unsigned cmd, unsigned long arg)
1da177e4
LT		 871{
872 int ret;
873 lock_kernel();
ef7822c2 874 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 875 unlock_kernel();
876 return ret;
877}
878
ef7822c2
AV		 879static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
880 unsigned cmd, unsigned long arg);
881static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
882 unsigned cmd, unsigned long arg);
1da177e4 883
ef7822c2
AV		 884static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
885 unsigned cmd, unsigned long arg)
1da177e4
LT		 886{
887 switch (cmd) {
888 case CCISS_GETPCIINFO:
889 case CCISS_GETINTINFO:
890 case CCISS_SETINTINFO:
891 case CCISS_GETNODENAME:
892 case CCISS_SETNODENAME:
893 case CCISS_GETHEARTBEAT:
894 case CCISS_GETBUSTYPES:
895 case CCISS_GETFIRMVER:
896 case CCISS_GETDRIVVER:
897 case CCISS_REVALIDVOLS:
898 case CCISS_DEREGDISK:
899 case CCISS_REGNEWDISK:
900 case CCISS_REGNEWD:
901 case CCISS_RESCANDISK:
902 case CCISS_GETLUNINFO:
ef7822c2 903 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 904
905 case CCISS_PASSTHRU32:
ef7822c2 906 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 907 case CCISS_BIG_PASSTHRU32:
ef7822c2 908 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 909
910 default:
911 return -ENOIOCTLCMD;
912 }
913}
914
ef7822c2
AV		 915static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
916 unsigned cmd, unsigned long arg)
1da177e4
LT		 917{
918 IOCTL32_Command_struct __user *arg32 =
7c832835 919 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 920 IOCTL_Command_struct arg64;
921 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
922 int err;
923 u32 cp;
924
925 err = 0;
7c832835
BH		 926 err |=
927 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
928 sizeof(arg64.LUN_info));
929 err |=
930 copy_from_user(&arg64.Request, &arg32->Request,
931 sizeof(arg64.Request));
932 err |=
933 copy_from_user(&arg64.error_info, &arg32->error_info,
934 sizeof(arg64.error_info));
1da177e4
LT		 935 err |= get_user(arg64.buf_size, &arg32->buf_size);
936 err |= get_user(cp, &arg32->buf);
937 arg64.buf = compat_ptr(cp);
938 err |= copy_to_user(p, &arg64, sizeof(arg64));
939
940 if (err)
941 return -EFAULT;
942
ef7822c2 943 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 944 if (err)
945 return err;
7c832835
BH		 946 err |=
947 copy_in_user(&arg32->error_info, &p->error_info,
948 sizeof(arg32->error_info));
1da177e4
LT		 949 if (err)
950 return -EFAULT;
951 return err;
952}
953
ef7822c2
AV		 954static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
955 unsigned cmd, unsigned long arg)
1da177e4
LT		 956{
957 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 958 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 959 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 960 BIG_IOCTL_Command_struct __user *p =
961 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 962 int err;
963 u32 cp;
964
965 err = 0;
7c832835
BH		 966 err |=
967 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
968 sizeof(arg64.LUN_info));
969 err |=
970 copy_from_user(&arg64.Request, &arg32->Request,
971 sizeof(arg64.Request));
972 err |=
973 copy_from_user(&arg64.error_info, &arg32->error_info,
974 sizeof(arg64.error_info));
1da177e4
LT		 975 err |= get_user(arg64.buf_size, &arg32->buf_size);
976 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
977 err |= get_user(cp, &arg32->buf);
978 arg64.buf = compat_ptr(cp);
979 err |= copy_to_user(p, &arg64, sizeof(arg64));
980
981 if (err)
7c832835 982 return -EFAULT;
1da177e4 983
ef7822c2 984 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 985 if (err)
986 return err;
7c832835
BH		 987 err |=
988 copy_in_user(&arg32->error_info, &p->error_info,
989 sizeof(arg32->error_info));
1da177e4
LT		 990 if (err)
991 return -EFAULT;
992 return err;
993}
994#endif
a885c8c4
CH		 995
996static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
997{
998 drive_info_struct *drv = get_drv(bdev->bd_disk);
999
1000 if (!drv->cylinders)
1001 return -ENXIO;
1002
1003 geo->heads = drv->heads;
1004 geo->sectors = drv->sectors;
1005 geo->cylinders = drv->cylinders;
1006 return 0;
1007}
1008
0a9279cc
MM		 1009static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1010{
1011 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1012 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1013 (void)check_for_unit_attention(host, c);
1014}
1da177e4 1015/*
7c832835 1016 * ioctl
1da177e4 1017 */
ef7822c2 1018static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1019 unsigned int cmd, unsigned long arg)
1da177e4 1020{
1da177e4
LT		 1021 struct gendisk *disk = bdev->bd_disk;
1022 ctlr_info_t *host = get_host(disk);
1023 drive_info_struct *drv = get_drv(disk);
1024 int ctlr = host->ctlr;
1025 void __user *argp = (void __user *)arg;
1026
1027#ifdef CCISS_DEBUG
1028 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1029#endif /* CCISS_DEBUG */
1030
1031 switch (cmd) {
1da177e4 1032 case CCISS_GETPCIINFO:
7c832835
BH		 1033 {
1034 cciss_pci_info_struct pciinfo;
1035
1036 if (!arg)
1037 return -EINVAL;
1038 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1039 pciinfo.bus = host->pdev->bus->number;
1040 pciinfo.dev_fn = host->pdev->devfn;
1041 pciinfo.board_id = host->board_id;
1042 if (copy_to_user
1043 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1044 return -EFAULT;
1045 return 0;
1046 }
1da177e4 1047 case CCISS_GETINTINFO:
7c832835
BH		 1048 {
1049 cciss_coalint_struct intinfo;
1050 if (!arg)
1051 return -EINVAL;
1052 intinfo.delay =
1053 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1054 intinfo.count =
1055 readl(&host->cfgtable->HostWrite.CoalIntCount);
1056 if (copy_to_user
1057 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1058 return -EFAULT;
1059 return 0;
1060 }
1da177e4 1061 case CCISS_SETINTINFO:
1da177e4 1062 {
7c832835
BH		 1063 cciss_coalint_struct intinfo;
1064 unsigned long flags;
1065 int i;
1066
1067 if (!arg)
1068 return -EINVAL;
1069 if (!capable(CAP_SYS_ADMIN))
1070 return -EPERM;
1071 if (copy_from_user
1072 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1073 return -EFAULT;
1074 if ((intinfo.delay == 0) && (intinfo.count == 0))
1075 {
1076// printk("cciss_ioctl: delay and count cannot be 0\n");
1077 return -EINVAL;
1078 }
1079 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1080 /* Update the field, and then ring the doorbell */
1081 writel(intinfo.delay,
1082 &(host->cfgtable->HostWrite.CoalIntDelay));
1083 writel(intinfo.count,
1084 &(host->cfgtable->HostWrite.CoalIntCount));
1085 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1086
1087 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1088 if (!(readl(host->vaddr + SA5_DOORBELL)
1089 & CFGTBL_ChangeReq))
1090 break;
1091 /* delay and try again */
1092 udelay(1000);
1093 }
1094 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1095 if (i >= MAX_IOCTL_CONFIG_WAIT)
1096 return -EAGAIN;
1097 return 0;
1da177e4 1098 }
1da177e4 1099 case CCISS_GETNODENAME:
7c832835
BH		 1100 {
1101 NodeName_type NodeName;
1102 int i;
1103
1104 if (!arg)
1105 return -EINVAL;
1106 for (i = 0; i < 16; i++)
1107 NodeName[i] =
1108 readb(&host->cfgtable->ServerName[i]);
1109 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1110 return -EFAULT;
1111 return 0;
1112 }
1da177e4 1113 case CCISS_SETNODENAME:
7c832835
BH		 1114 {
1115 NodeName_type NodeName;
1116 unsigned long flags;
1117 int i;
1118
1119 if (!arg)
1120 return -EINVAL;
1121 if (!capable(CAP_SYS_ADMIN))
1122 return -EPERM;
1123
1124 if (copy_from_user
1125 (NodeName, argp, sizeof(NodeName_type)))
1126 return -EFAULT;
1127
1128 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1129
1130 /* Update the field, and then ring the doorbell */
1131 for (i = 0; i < 16; i++)
1132 writeb(NodeName[i],
1133 &host->cfgtable->ServerName[i]);
1134
1135 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1136
1137 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1138 if (!(readl(host->vaddr + SA5_DOORBELL)
1139 & CFGTBL_ChangeReq))
1140 break;
1141 /* delay and try again */
1142 udelay(1000);
1143 }
1144 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1145 if (i >= MAX_IOCTL_CONFIG_WAIT)
1146 return -EAGAIN;
1147 return 0;
1148 }
1da177e4
LT		 1149
1150 case CCISS_GETHEARTBEAT:
7c832835
BH		 1151 {
1152 Heartbeat_type heartbeat;
1153
1154 if (!arg)
1155 return -EINVAL;
1156 heartbeat = readl(&host->cfgtable->HeartBeat);
1157 if (copy_to_user
1158 (argp, &heartbeat, sizeof(Heartbeat_type)))
1159 return -EFAULT;
1160 return 0;
1161 }
1da177e4 1162 case CCISS_GETBUSTYPES:
7c832835
BH		 1163 {
1164 BusTypes_type BusTypes;
1165
1166 if (!arg)
1167 return -EINVAL;
1168 BusTypes = readl(&host->cfgtable->BusTypes);
1169 if (copy_to_user
1170 (argp, &BusTypes, sizeof(BusTypes_type)))
1171 return -EFAULT;
1172 return 0;
1173 }
1da177e4 1174 case CCISS_GETFIRMVER:
7c832835
BH		 1175 {
1176 FirmwareVer_type firmware;
1da177e4 1177
7c832835
BH		 1178 if (!arg)
1179 return -EINVAL;
1180 memcpy(firmware, host->firm_ver, 4);
1da177e4 1181
7c832835
BH		 1182 if (copy_to_user
1183 (argp, firmware, sizeof(FirmwareVer_type)))
1184 return -EFAULT;
1185 return 0;
1186 }
1187 case CCISS_GETDRIVVER:
1188 {
1189 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1190
7c832835
BH		 1191 if (!arg)
1192 return -EINVAL;
1da177e4 1193
7c832835
BH		 1194 if (copy_to_user
1195 (argp, &DriverVer, sizeof(DriverVer_type)))
1196 return -EFAULT;
1197 return 0;
1198 }
1da177e4 1199
6ae5ce8e
MM		 1200 case CCISS_DEREGDISK:
1201 case CCISS_REGNEWD:
1da177e4 1202 case CCISS_REVALIDVOLS:
6ae5ce8e 1203 return rebuild_lun_table(host, 0);
7c832835
BH		 1204
1205 case CCISS_GETLUNINFO:{
1206 LogvolInfo_struct luninfo;
1207
1208 luninfo.LunID = drv->LunID;
1209 luninfo.num_opens = drv->usage_count;
1210 luninfo.num_parts = 0;
1211 if (copy_to_user(argp, &luninfo,
1212 sizeof(LogvolInfo_struct)))
1213 return -EFAULT;
1214 return 0;
1215 }
1da177e4 1216 case CCISS_PASSTHRU:
1da177e4 1217 {
7c832835
BH		 1218 IOCTL_Command_struct iocommand;
1219 CommandList_struct *c;
1220 char *buff = NULL;
1221 u64bit temp64;
1222 unsigned long flags;
6e9a4738 1223 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1224
7c832835
BH		 1225 if (!arg)
1226 return -EINVAL;
1da177e4 1227
7c832835
BH		 1228 if (!capable(CAP_SYS_RAWIO))
1229 return -EPERM;
1da177e4 1230
7c832835
BH		 1231 if (copy_from_user
1232 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1233 return -EFAULT;
1234 if ((iocommand.buf_size < 1) &&
1235 (iocommand.Request.Type.Direction != XFER_NONE)) {
1236 return -EINVAL;
1237 }
1238#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1239 /* Check kmalloc limits */
1240 if (iocommand.buf_size > 128000)
1241 return -EINVAL;
1242#endif
1243 if (iocommand.buf_size > 0) {
1244 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1245 if (buff == NULL)
1246 return -EFAULT;
1247 }
1248 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1249 /* Copy the data into the buffer we created */
1250 if (copy_from_user
1251 (buff, iocommand.buf, iocommand.buf_size)) {
1252 kfree(buff);
1253 return -EFAULT;
1254 }
1255 } else {
1256 memset(buff, 0, iocommand.buf_size);
1257 }
1258 if ((c = cmd_alloc(host, 0)) == NULL) {
1259 kfree(buff);
1260 return -ENOMEM;
1261 }
1262 // Fill in the command type
1263 c->cmd_type = CMD_IOCTL_PEND;
1264 // Fill in Command Header
1265 c->Header.ReplyQueue = 0; // unused in simple mode
1266 if (iocommand.buf_size > 0) // buffer to fill
1267 {
1268 c->Header.SGList = 1;
1269 c->Header.SGTotal = 1;
1270 } else // no buffers to fill
1271 {
1272 c->Header.SGList = 0;
1273 c->Header.SGTotal = 0;
1274 }
1275 c->Header.LUN = iocommand.LUN_info;
1276 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1277
7c832835
BH		 1278 // Fill in Request block
1279 c->Request = iocommand.Request;
1da177e4 1280
7c832835
BH		 1281 // Fill in the scatter gather information
1282 if (iocommand.buf_size > 0) {
1283 temp64.val = pci_map_single(host->pdev, buff,
1284 iocommand.buf_size,
1285 PCI_DMA_BIDIRECTIONAL);
1286 c->SG[0].Addr.lower = temp64.val32.lower;
1287 c->SG[0].Addr.upper = temp64.val32.upper;
1288 c->SG[0].Len = iocommand.buf_size;
1289 c->SG[0].Ext = 0; // we are not chaining
1290 }
1291 c->waiting = &wait;
1292
1293 /* Put the request on the tail of the request queue */
1294 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1295 addQ(&host->reqQ, c);
1296 host->Qdepth++;
1297 start_io(host);
1298 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1299
1300 wait_for_completion(&wait);
1301
1302 /* unlock the buffers from DMA */
1303 temp64.val32.lower = c->SG[0].Addr.lower;
1304 temp64.val32.upper = c->SG[0].Addr.upper;
1305 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1306 iocommand.buf_size,
1307 PCI_DMA_BIDIRECTIONAL);
1308
0a9279cc
MM		 1309 check_ioctl_unit_attention(host, c);
1310
7c832835
BH		 1311 /* Copy the error information out */
1312 iocommand.error_info = *(c->err_info);
1313 if (copy_to_user
1314 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1315 kfree(buff);
1da177e4
LT		 1316 cmd_free(host, c, 0);
1317 return -EFAULT;
1318 }
7c832835
BH		 1319
1320 if (iocommand.Request.Type.Direction == XFER_READ) {
1321 /* Copy the data out of the buffer we created */
1322 if (copy_to_user
1323 (iocommand.buf, buff, iocommand.buf_size)) {
1324 kfree(buff);
1325 cmd_free(host, c, 0);
1326 return -EFAULT;
1327 }
1328 }
1329 kfree(buff);
1330 cmd_free(host, c, 0);
1331 return 0;
1da177e4 1332 }
7c832835
BH		 1333 case CCISS_BIG_PASSTHRU:{
1334 BIG_IOCTL_Command_struct *ioc;
1335 CommandList_struct *c;
1336 unsigned char **buff = NULL;
1337 int *buff_size = NULL;
1338 u64bit temp64;
1339 unsigned long flags;
1340 BYTE sg_used = 0;
1341 int status = 0;
1342 int i;
6e9a4738 1343 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1344 __u32 left;
1345 __u32 sz;
1346 BYTE __user *data_ptr;
1347
1348 if (!arg)
1349 return -EINVAL;
1350 if (!capable(CAP_SYS_RAWIO))
1351 return -EPERM;
1352 ioc = (BIG_IOCTL_Command_struct *)
1353 kmalloc(sizeof(*ioc), GFP_KERNEL);
1354 if (!ioc) {
1355 status = -ENOMEM;
1356 goto cleanup1;
1357 }
1358 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1359 status = -EFAULT;
1360 goto cleanup1;
1361 }
1362 if ((ioc->buf_size < 1) &&
1363 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1364 status = -EINVAL;
1365 goto cleanup1;
7c832835
BH		 1366 }
1367 /* Check kmalloc limits using all SGs */
1368 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1369 status = -EINVAL;
1370 goto cleanup1;
1371 }
1372 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1373 status = -EINVAL;
1374 goto cleanup1;
1375 }
1376 buff =
1377 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1378 if (!buff) {
1da177e4
LT		 1379 status = -ENOMEM;
1380 goto cleanup1;
1381 }
5cbded58 1382 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1383 GFP_KERNEL);
1384 if (!buff_size) {
1385 status = -ENOMEM;
1386 goto cleanup1;
1387 }
1388 left = ioc->buf_size;
1389 data_ptr = ioc->buf;
1390 while (left) {
1391 sz = (left >
1392 ioc->malloc_size) ? ioc->
1393 malloc_size : left;
1394 buff_size[sg_used] = sz;
1395 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1396 if (buff[sg_used] == NULL) {
1da177e4 1397 status = -ENOMEM;
15534d38
JA		 1398 goto cleanup1;
1399 }
7c832835
BH		 1400 if (ioc->Request.Type.Direction == XFER_WRITE) {
1401 if (copy_from_user
1402 (buff[sg_used], data_ptr, sz)) {
f7108f91 1403 status = -EFAULT;
7c832835
BH		 1404 goto cleanup1;
1405 }
1406 } else {
1407 memset(buff[sg_used], 0, sz);
1408 }
1409 left -= sz;
1410 data_ptr += sz;
1411 sg_used++;
1412 }
1413 if ((c = cmd_alloc(host, 0)) == NULL) {
1414 status = -ENOMEM;
1415 goto cleanup1;
1416 }
1417 c->cmd_type = CMD_IOCTL_PEND;
1418 c->Header.ReplyQueue = 0;
1419
1420 if (ioc->buf_size > 0) {
1421 c->Header.SGList = sg_used;
1422 c->Header.SGTotal = sg_used;
1da177e4 1423 } else {
7c832835
BH		 1424 c->Header.SGList = 0;
1425 c->Header.SGTotal = 0;
1da177e4 1426 }
7c832835
BH		 1427 c->Header.LUN = ioc->LUN_info;
1428 c->Header.Tag.lower = c->busaddr;
1429
1430 c->Request = ioc->Request;
1431 if (ioc->buf_size > 0) {
1432 int i;
1433 for (i = 0; i < sg_used; i++) {
1434 temp64.val =
1435 pci_map_single(host->pdev, buff[i],
1436 buff_size[i],
1437 PCI_DMA_BIDIRECTIONAL);
1438 c->SG[i].Addr.lower =
1439 temp64.val32.lower;
1440 c->SG[i].Addr.upper =
1441 temp64.val32.upper;
1442 c->SG[i].Len = buff_size[i];
1443 c->SG[i].Ext = 0; /* we are not chaining */
1444 }
1445 }
1446 c->waiting = &wait;
1447 /* Put the request on the tail of the request queue */
1448 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1449 addQ(&host->reqQ, c);
1450 host->Qdepth++;
1451 start_io(host);
1452 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1453 wait_for_completion(&wait);
1454 /* unlock the buffers from DMA */
1455 for (i = 0; i < sg_used; i++) {
1456 temp64.val32.lower = c->SG[i].Addr.lower;
1457 temp64.val32.upper = c->SG[i].Addr.upper;
1458 pci_unmap_single(host->pdev,
1459 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1460 PCI_DMA_BIDIRECTIONAL);
1da177e4 1461 }
0a9279cc 1462 check_ioctl_unit_attention(host, c);
7c832835
BH		 1463 /* Copy the error information out */
1464 ioc->error_info = *(c->err_info);
1465 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1466 cmd_free(host, c, 0);
1467 status = -EFAULT;
1468 goto cleanup1;
1469 }
1470 if (ioc->Request.Type.Direction == XFER_READ) {
1471 /* Copy the data out of the buffer we created */
1472 BYTE __user *ptr = ioc->buf;
1473 for (i = 0; i < sg_used; i++) {
1474 if (copy_to_user
1475 (ptr, buff[i], buff_size[i])) {
1476 cmd_free(host, c, 0);
1477 status = -EFAULT;
1478 goto cleanup1;
1479 }
1480 ptr += buff_size[i];
1da177e4 1481 }
1da177e4 1482 }
7c832835
BH		 1483 cmd_free(host, c, 0);
1484 status = 0;
1485 cleanup1:
1486 if (buff) {
1487 for (i = 0; i < sg_used; i++)
1488 kfree(buff[i]);
1489 kfree(buff);
1490 }
1491 kfree(buff_size);
1492 kfree(ioc);
1493 return status;
1da177e4 1494 }
03bbfee5
MMOD		 1495
1496 /* scsi_cmd_ioctl handles these, below, though some are not */
1497 /* very meaningful for cciss. SG_IO is the main one people want. */
1498
1499 case SG_GET_VERSION_NUM:
1500 case SG_SET_TIMEOUT:
1501 case SG_GET_TIMEOUT:
1502 case SG_GET_RESERVED_SIZE:
1503 case SG_SET_RESERVED_SIZE:
1504 case SG_EMULATED_HOST:
1505 case SG_IO:
1506 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1507 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1508
1509 /* scsi_cmd_ioctl would normally handle these, below, but */
1510 /* they aren't a good fit for cciss, as CD-ROMs are */
1511 /* not supported, and we don't have any bus/target/lun */
1512 /* which we present to the kernel. */
1513
1514 case CDROM_SEND_PACKET:
1515 case CDROMCLOSETRAY:
1516 case CDROMEJECT:
1517 case SCSI_IOCTL_GET_IDLUN:
1518 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1519 default:
1520 return -ENOTTY;
1521 }
1da177e4
LT		 1522}
1523
7b30f092
JA		 1524static void cciss_check_queues(ctlr_info_t *h)
1525{
1526 int start_queue = h->next_to_run;
1527 int i;
1528
1529 /* check to see if we have maxed out the number of commands that can
1530 * be placed on the queue. If so then exit. We do this check here
1531 * in case the interrupt we serviced was from an ioctl and did not
1532 * free any new commands.
1533 */
f880632f 1534 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1535 return;
1536
1537 /* We have room on the queue for more commands. Now we need to queue
1538 * them up. We will also keep track of the next queue to run so
1539 * that every queue gets a chance to be started first.
1540 */
1541 for (i = 0; i < h->highest_lun + 1; i++) {
1542 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1543 /* make sure the disk has been added and the drive is real
1544 * because this can be called from the middle of init_one.
1545 */
1546 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1547 continue;
1548 blk_start_queue(h->gendisk[curr_queue]->queue);
1549
1550 /* check to see if we have maxed out the number of commands
1551 * that can be placed on the queue.
1552 */
f880632f 1553 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1554 if (curr_queue == start_queue) {
1555 h->next_to_run =
1556 (start_queue + 1) % (h->highest_lun + 1);
1557 break;
1558 } else {
1559 h->next_to_run = curr_queue;
1560 break;
1561 }
7b30f092
JA		 1562 }
1563 }
1564}
1565
ca1e0484
MM		 1566static void cciss_softirq_done(struct request *rq)
1567{
1568 CommandList_struct *cmd = rq->completion_data;
1569 ctlr_info_t *h = hba[cmd->ctlr];
1570 unsigned long flags;
1571 u64bit temp64;
1572 int i, ddir;
1573
1574 if (cmd->Request.Type.Direction == XFER_READ)
1575 ddir = PCI_DMA_FROMDEVICE;
1576 else
1577 ddir = PCI_DMA_TODEVICE;
1578
1579 /* command did not need to be retried */
1580 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1581 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1582 temp64.val32.lower = cmd->SG[i].Addr.lower;
1583 temp64.val32.upper = cmd->SG[i].Addr.upper;
1584 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1585 }
1586
ca1e0484
MM		 1587#ifdef CCISS_DEBUG
1588 printk("Done with %p\n", rq);
7c832835 1589#endif /* CCISS_DEBUG */
ca1e0484 1590
c3a4d78c 1591 /* set the residual count for pc requests */
ac44e5b2 1592 if (blk_pc_request(rq))
c3a4d78c 1593 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1594
c3a4d78c 1595 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1596
ca1e0484 1597 spin_lock_irqsave(&h->lock, flags);
7c832835 1598 cmd_free(h, cmd, 1);
7b30f092 1599 cciss_check_queues(h);
ca1e0484
MM		 1600 spin_unlock_irqrestore(&h->lock, flags);
1601}
1602
b57695fe 1603static void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[],
1604 uint32_t log_unit)
1605{
1606 log_unit = h->drv[log_unit].LunID & 0x03fff;
1607 memset(&scsi3addr[4], 0, 4);
1608 memcpy(&scsi3addr[0], &log_unit, 4);
1609 scsi3addr[3] |= 0x40;
1610}
1611
7fe06326
AP		 1612/* This function gets the SCSI vendor, model, and revision of a logical drive
1613 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1614 * they cannot be read.
1615 */
1616static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1617 char *vendor, char *model, char *rev)
1618{
1619 int rc;
1620 InquiryData_struct *inq_buf;
b57695fe 1621 unsigned char scsi3addr[8];
7fe06326
AP		 1622
1623 *vendor = '\0';
1624 *model = '\0';
1625 *rev = '\0';
1626
1627 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1628 if (!inq_buf)
1629 return;
1630
b57695fe 1631 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1632 if (withirq)
1633 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1634 sizeof(InquiryData_struct), 0,
1635 scsi3addr, TYPE_CMD);
7fe06326
AP		 1636 else
1637 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1638 sizeof(InquiryData_struct), 0,
1639 scsi3addr, TYPE_CMD);
7fe06326
AP		 1640 if (rc == IO_OK) {
1641 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1642 vendor[VENDOR_LEN] = '\0';
1643 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1644 model[MODEL_LEN] = '\0';
1645 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1646 rev[REV_LEN] = '\0';
1647 }
1648
1649 kfree(inq_buf);
1650 return;
1651}
1652
a72da29b
MM		 1653/* This function gets the serial number of a logical drive via
1654 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1655 * number cannot be had, for whatever reason, 16 bytes of 0xff
1656 * are returned instead.
1657 */
1658static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1659 unsigned char *serial_no, int buflen)
1660{
1661#define PAGE_83_INQ_BYTES 64
1662 int rc;
1663 unsigned char *buf;
b57695fe 1664 unsigned char scsi3addr[8];
a72da29b
MM		 1665
1666 if (buflen > 16)
1667 buflen = 16;
1668 memset(serial_no, 0xff, buflen);
1669 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1670 if (!buf)
1671 return;
1672 memset(serial_no, 0, buflen);
b57695fe 1673 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1674 if (withirq)
1675 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1676 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1677 else
1678 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1679 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1680 if (rc == IO_OK)
1681 memcpy(serial_no, &buf[8], buflen);
1682 kfree(buf);
1683 return;
1684}
1685
617e1344
SC		 1686/*
1687 * cciss_add_disk sets up the block device queue for a logical drive
1688 */
1689static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1690 int drv_index)
1691{
1692 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1693 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1694 disk->major = h->major;
1695 disk->first_minor = drv_index << NWD_SHIFT;
1696 disk->fops = &cciss_fops;
617e1344
SC		 1697 if (h->drv[drv_index].dev == NULL) {
1698 if (cciss_create_ld_sysfs_entry(h, drv_index))
1699 goto cleanup_queue;
1700 }
6ae5ce8e 1701 disk->private_data = &h->drv[drv_index];
617e1344 1702 disk->driverfs_dev = h->drv[drv_index].dev;
6ae5ce8e
MM		 1703
1704 /* Set up queue information */
1705 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1706
1707 /* This is a hardware imposed limit. */
1708 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1709
1710 /* This is a limit in the driver and could be eliminated. */
1711 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1712
1713 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1714
1715 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1716
1717 disk->queue->queuedata = h;
1718
e1defc4f
MP		 1719 blk_queue_logical_block_size(disk->queue,
1720 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1721
1722 /* Make sure all queue data is written out before */
1723 /* setting h->drv[drv_index].queue, as setting this */
1724 /* allows the interrupt handler to start the queue */
1725 wmb();
1726 h->drv[drv_index].queue = disk->queue;
1727 add_disk(disk);
617e1344
SC		 1728 return 0;
1729
1730cleanup_queue:
1731 blk_cleanup_queue(disk->queue);
1732 disk->queue = NULL;
1733 return -1;
6ae5ce8e
MM		 1734}
1735
ddd47442 1736/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1737 * If the usage_count is zero and it is a heretofore unknown drive, or,
1738 * the drive's capacity, geometry, or serial number has changed,
1739 * then the drive information will be updated and the disk will be
1740 * re-registered with the kernel. If these conditions don't hold,
1741 * then it will be left alone for the next reboot. The exception to this
1742 * is disk 0 which will always be left registered with the kernel since it
1743 * is also the controller node. Any changes to disk 0 will show up on
1744 * the next reboot.
7c832835 1745 */
6ae5ce8e 1746static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
7c832835 1747{
ddd47442
MM		 1748 ctlr_info_t *h = hba[ctlr];
1749 struct gendisk *disk;
ddd47442
MM		 1750 InquiryData_struct *inq_buff = NULL;
1751 unsigned int block_size;
00988a35 1752 sector_t total_size;
ddd47442
MM		 1753 unsigned long flags = 0;
1754 int ret = 0;
a72da29b
MM		 1755 drive_info_struct *drvinfo;
1756
1757 /* Get information about the disk and modify the driver structure */
1758 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1759 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1760 if (inq_buff == NULL || drvinfo == NULL)
1761 goto mem_msg;
1762
1763 /* testing to see if 16-byte CDBs are already being used */
1764 if (h->cciss_read == CCISS_READ_16) {
1765 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1766 &total_size, &block_size);
1767
1768 } else {
1769 cciss_read_capacity(ctlr, drv_index, 1,
1770 &total_size, &block_size);
1771
1772 /* if read_capacity returns all F's this volume is >2TB */
1773 /* in size so we switch to 16-byte CDB's for all */
1774 /* read/write ops */
1775 if (total_size == 0xFFFFFFFFULL) {
1776 cciss_read_capacity_16(ctlr, drv_index, 1,
1777 &total_size, &block_size);
1778 h->cciss_read = CCISS_READ_16;
1779 h->cciss_write = CCISS_WRITE_16;
1780 } else {
1781 h->cciss_read = CCISS_READ_10;
1782 h->cciss_write = CCISS_WRITE_10;
1783 }
1784 }
1785
1786 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1787 inq_buff, drvinfo);
1788 drvinfo->block_size = block_size;
1789 drvinfo->nr_blocks = total_size + 1;
1790
7fe06326
AP		 1791 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1792 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1793 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1794 sizeof(drvinfo->serial_no));
1795
1796 /* Is it the same disk we already know, and nothing's changed? */
1797 if (h->drv[drv_index].raid_level != -1 &&
1798 ((memcmp(drvinfo->serial_no,
1799 h->drv[drv_index].serial_no, 16) == 0) &&
1800 drvinfo->block_size == h->drv[drv_index].block_size &&
1801 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1802 drvinfo->heads == h->drv[drv_index].heads &&
1803 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1804 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1805 /* The disk is unchanged, nothing to update */
1806 goto freeret;
a72da29b 1807
6ae5ce8e
MM		 1808 /* If we get here it's not the same disk, or something's changed,
1809 * so we need to * deregister it, and re-register it, if it's not
1810 * in use.
1811 * If the disk already exists then deregister it before proceeding
1812 * (unless it's the first disk (for the controller node).
1813 */
a72da29b
MM		 1814 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1815 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1816 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1817 h->drv[drv_index].busy_configuring = 1;
1818 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1819
6ae5ce8e
MM		 1820 /* deregister_disk sets h->drv[drv_index].queue = NULL
1821 * which keeps the interrupt handler from starting
1822 * the queue.
1823 */
a0ea8622 1824 ret = deregister_disk(h, drv_index, 0);
ddd47442
MM		 1825 h->drv[drv_index].busy_configuring = 0;
1826 }
1827
1828 /* If the disk is in use return */
1829 if (ret)
a72da29b
MM		 1830 goto freeret;
1831
6ae5ce8e
MM		 1832 /* Save the new information from cciss_geometry_inquiry
1833 * and serial number inquiry.
1834 */
a72da29b
MM		 1835 h->drv[drv_index].block_size = drvinfo->block_size;
1836 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1837 h->drv[drv_index].heads = drvinfo->heads;
1838 h->drv[drv_index].sectors = drvinfo->sectors;
1839 h->drv[drv_index].cylinders = drvinfo->cylinders;
1840 h->drv[drv_index].raid_level = drvinfo->raid_level;
1841 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1842 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1843 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1844 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1845
1846 ++h->num_luns;
1847 disk = h->gendisk[drv_index];
1848 set_capacity(disk, h->drv[drv_index].nr_blocks);
1849
6ae5ce8e
MM		 1850 /* If it's not disk 0 (drv_index != 0)
1851 * or if it was disk 0, but there was previously
1852 * no actual corresponding configured logical drive
1853 * (raid_leve == -1) then we want to update the
1854 * logical drive's information.
1855 */
1856 if (drv_index || first_time)
1857 cciss_add_disk(h, disk, drv_index);
ddd47442 1858
6ae5ce8e 1859freeret:
ddd47442 1860 kfree(inq_buff);
a72da29b 1861 kfree(drvinfo);
ddd47442 1862 return;
6ae5ce8e 1863mem_msg:
ddd47442
MM		 1864 printk(KERN_ERR "cciss: out of memory\n");
1865 goto freeret;
1866}
1867
1868/* This function will find the first index of the controllers drive array
1869 * that has a -1 for the raid_level and will return that index. This is
1870 * where new drives will be added. If the index to be returned is greater
1871 * than the highest_lun index for the controller then highest_lun is set
1872 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1873 * "controller_node" is used to know if this is a real logical drive, or just
1874 * the controller node, which determines if this counts towards highest_lun.
7c832835 1875 */
eece695f 1876static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1877{
1878 int i;
1879
7c832835
BH		 1880 for (i = 0; i < CISS_MAX_LUN; i++) {
1881 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1882 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1883 if (!controller_node)
1884 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1885 return i;
1886 }
1887 }
1888 return -1;
1889}
1890
6ae5ce8e
MM		 1891/* cciss_add_gendisk finds a free hba[]->drv structure
1892 * and allocates a gendisk if needed, and sets the lunid
1893 * in the drvinfo structure. It returns the index into
1894 * the ->drv[] array, or -1 if none are free.
1895 * is_controller_node indicates whether highest_lun should
1896 * count this disk, or if it's only being added to provide
1897 * a means to talk to the controller in case no logical
1898 * drives have yet been configured.
1899 */
eece695f 1900static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
6ae5ce8e
MM		 1901{
1902 int drv_index;
1903
eece695f 1904 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1905 if (drv_index == -1)
1906 return -1;
1907 /*Check if the gendisk needs to be allocated */
1908 if (!h->gendisk[drv_index]) {
1909 h->gendisk[drv_index] =
1910 alloc_disk(1 << NWD_SHIFT);
1911 if (!h->gendisk[drv_index]) {
1912 printk(KERN_ERR "cciss%d: could not "
1913 "allocate a new disk %d\n",
1914 h->ctlr, drv_index);
1915 return -1;
1916 }
1917 }
1918 h->drv[drv_index].LunID = lunid;
097d0264
SC		 1919 if (h->drv[drv_index].dev == NULL) {
1920 if (cciss_create_ld_sysfs_entry(h, drv_index))
1921 goto err_free_disk;
1922 }
6ae5ce8e
MM		 1923 /* Don't need to mark this busy because nobody */
1924 /* else knows about this disk yet to contend */
1925 /* for access to it. */
1926 h->drv[drv_index].busy_configuring = 0;
1927 wmb();
1928 return drv_index;
7fe06326
AP		 1929
1930err_free_disk:
1931 put_disk(h->gendisk[drv_index]);
1932 h->gendisk[drv_index] = NULL;
1933 return -1;
6ae5ce8e
MM		 1934}
1935
1936/* This is for the special case of a controller which
1937 * has no logical drives. In this case, we still need
1938 * to register a disk so the controller can be accessed
1939 * by the Array Config Utility.
1940 */
1941static void cciss_add_controller_node(ctlr_info_t *h)
1942{
1943 struct gendisk *disk;
1944 int drv_index;
1945
1946 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1947 return;
1948
eece695f 1949 drv_index = cciss_add_gendisk(h, 0, 1);
6ae5ce8e
MM		 1950 if (drv_index == -1) {
1951 printk(KERN_WARNING "cciss%d: could not "
1952 "add disk 0.\n", h->ctlr);
1953 return;
1954 }
1955 h->drv[drv_index].block_size = 512;
1956 h->drv[drv_index].nr_blocks = 0;
1957 h->drv[drv_index].heads = 0;
1958 h->drv[drv_index].sectors = 0;
1959 h->drv[drv_index].cylinders = 0;
1960 h->drv[drv_index].raid_level = -1;
1961 memset(h->drv[drv_index].serial_no, 0, 16);
1962 disk = h->gendisk[drv_index];
1963 cciss_add_disk(h, disk, drv_index);
1964}
1965
ddd47442 1966/* This function will add and remove logical drives from the Logical
d14c4ab5 1967 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1968 * so that mount points are preserved until the next reboot. This allows
1969 * for the removal of logical drives in the middle of the drive array
1970 * without a re-ordering of those drives.
1971 * INPUT
1972 * h = The controller to perform the operations on
7c832835 1973 */
6ae5ce8e 1974static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1da177e4 1975{
ddd47442
MM		 1976 int ctlr = h->ctlr;
1977 int num_luns;
1978 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 1979 int return_code;
1980 int listlength = 0;
1981 int i;
1982 int drv_found;
1983 int drv_index = 0;
1984 __u32 lunid = 0;
1da177e4 1985 unsigned long flags;
ddd47442 1986
6ae5ce8e
MM		 1987 if (!capable(CAP_SYS_RAWIO))
1988 return -EPERM;
1989
ddd47442
MM		 1990 /* Set busy_configuring flag for this operation */
1991 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 1992 if (h->busy_configuring) {
ddd47442
MM		 1993 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1994 return -EBUSY;
1995 }
1996 h->busy_configuring = 1;
a72da29b 1997 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 1998
a72da29b
MM		 1999 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2000 if (ld_buff == NULL)
2001 goto mem_msg;
2002
2003 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2004 sizeof(ReportLunData_struct),
2005 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2006
a72da29b
MM		 2007 if (return_code == IO_OK)
2008 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2009 else { /* reading number of logical volumes failed */
2010 printk(KERN_WARNING "cciss: report logical volume"
2011 " command failed\n");
2012 listlength = 0;
2013 goto freeret;
2014 }
2015
2016 num_luns = listlength / 8; /* 8 bytes per entry */
2017 if (num_luns > CISS_MAX_LUN) {
2018 num_luns = CISS_MAX_LUN;
2019 printk(KERN_WARNING "cciss: more luns configured"
2020 " on controller than can be handled by"
2021 " this driver.\n");
2022 }
2023
6ae5ce8e
MM		 2024 if (num_luns == 0)
2025 cciss_add_controller_node(h);
2026
2027 /* Compare controller drive array to driver's drive array
2028 * to see if any drives are missing on the controller due
2029 * to action of Array Config Utility (user deletes drive)
2030 * and deregister logical drives which have disappeared.
2031 */
a72da29b
MM		 2032 for (i = 0; i <= h->highest_lun; i++) {
2033 int j;
2034 drv_found = 0;
d8a0be6a
SC		 2035
2036 /* skip holes in the array from already deleted drives */
2037 if (h->drv[i].raid_level == -1)
2038 continue;
2039
a72da29b
MM		 2040 for (j = 0; j < num_luns; j++) {
2041 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
2042 lunid = le32_to_cpu(lunid);
2043 if (h->drv[i].LunID == lunid) {
2044 drv_found = 1;
2045 break;
2046 }
2047 }
2048 if (!drv_found) {
2049 /* Deregister it from the OS, it's gone. */
2050 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2051 h->drv[i].busy_configuring = 1;
2052 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
a0ea8622 2053 return_code = deregister_disk(h, i, 1);
a72da29b 2054 h->drv[i].busy_configuring = 0;
ddd47442 2055 }
a72da29b 2056 }
ddd47442 2057
a72da29b
MM		 2058 /* Compare controller drive array to driver's drive array.
2059 * Check for updates in the drive information and any new drives
2060 * on the controller due to ACU adding logical drives, or changing
2061 * a logical drive's size, etc. Reregister any new/changed drives
2062 */
2063 for (i = 0; i < num_luns; i++) {
2064 int j;
ddd47442 2065
a72da29b 2066 drv_found = 0;
ddd47442 2067
a72da29b
MM		 2068 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
2069 lunid = le32_to_cpu(lunid);
ddd47442 2070
a72da29b
MM		 2071 /* Find if the LUN is already in the drive array
2072 * of the driver. If so then update its info
2073 * if not in use. If it does not exist then find
2074 * the first free index and add it.
2075 */
2076 for (j = 0; j <= h->highest_lun; j++) {
2077 if (h->drv[j].raid_level != -1 &&
2078 h->drv[j].LunID == lunid) {
2079 drv_index = j;
2080 drv_found = 1;
2081 break;
ddd47442 2082 }
a72da29b 2083 }
ddd47442 2084
a72da29b
MM		 2085 /* check if the drive was found already in the array */
2086 if (!drv_found) {
eece695f 2087 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2088 if (drv_index == -1)
2089 goto freeret;
a72da29b 2090 }
6ae5ce8e 2091 cciss_update_drive_info(ctlr, drv_index, first_time);
a72da29b 2092 } /* end for */
ddd47442 2093
6ae5ce8e 2094freeret:
ddd47442
MM		 2095 kfree(ld_buff);
2096 h->busy_configuring = 0;
2097 /* We return -1 here to tell the ACU that we have registered/updated
2098 * all of the drives that we can and to keep it from calling us
2099 * additional times.
7c832835 2100 */
ddd47442 2101 return -1;
6ae5ce8e 2102mem_msg:
ddd47442 2103 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2104 h->busy_configuring = 0;
ddd47442
MM		 2105 goto freeret;
2106}
2107
2108/* This function will deregister the disk and it's queue from the
2109 * kernel. It must be called with the controller lock held and the
2110 * drv structures busy_configuring flag set. It's parameters are:
2111 *
2112 * disk = This is the disk to be deregistered
2113 * drv = This is the drive_info_struct associated with the disk to be
2114 * deregistered. It contains information about the disk used
2115 * by the driver.
2116 * clear_all = This flag determines whether or not the disk information
2117 * is going to be completely cleared out and the highest_lun
2118 * reset. Sometimes we want to clear out information about
d14c4ab5 2119 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2120 * the highest_lun should be left unchanged and the LunID
2121 * should not be cleared.
2122*/
a0ea8622 2123static int deregister_disk(ctlr_info_t *h, int drv_index,
ddd47442
MM		 2124 int clear_all)
2125{
799202cb 2126 int i;
a0ea8622
SC		 2127 struct gendisk *disk;
2128 drive_info_struct *drv;
1da177e4
LT		 2129
2130 if (!capable(CAP_SYS_RAWIO))
2131 return -EPERM;
2132
a0ea8622
SC		 2133 drv = &h->drv[drv_index];
2134 disk = h->gendisk[drv_index];
2135
1da177e4 2136 /* make sure logical volume is NOT is use */
7c832835
BH		 2137 if (clear_all || (h->gendisk[0] == disk)) {
2138 if (drv->usage_count > 1)
2139 return -EBUSY;
2140 } else if (drv->usage_count > 0)
2141 return -EBUSY;
1da177e4 2142
ddd47442
MM		 2143 /* invalidate the devices and deregister the disk. If it is disk
2144 * zero do not deregister it but just zero out it's values. This
2145 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2146 */
2147 if (h->gendisk[0] != disk) {
5a9df732 2148 struct request_queue *q = disk->queue;
097d0264
SC		 2149 if (disk->flags & GENHD_FL_UP) {
2150 cciss_destroy_ld_sysfs_entry(h, drv_index);
5a9df732 2151 del_gendisk(disk);
097d0264 2152 }
5a9df732
AB		 2153 if (q) {
2154 blk_cleanup_queue(q);
2155 /* Set drv->queue to NULL so that we do not try
2156 * to call blk_start_queue on this queue in the
2157 * interrupt handler
2158 */
2159 drv->queue = NULL;
2160 }
2161 /* If clear_all is set then we are deleting the logical
2162 * drive, not just refreshing its info. For drives
2163 * other than disk 0 we will call put_disk. We do not
2164 * do this for disk 0 as we need it to be able to
2165 * configure the controller.
a72da29b 2166 */
5a9df732
AB		 2167 if (clear_all){
2168 /* This isn't pretty, but we need to find the
2169 * disk in our array and NULL our the pointer.
2170 * This is so that we will call alloc_disk if
2171 * this index is used again later.
a72da29b 2172 */
5a9df732 2173 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2174 if (h->gendisk[i] == disk) {
5a9df732
AB		 2175 h->gendisk[i] = NULL;
2176 break;
799202cb 2177 }
799202cb 2178 }
5a9df732 2179 put_disk(disk);
ddd47442 2180 }
799202cb
MM		 2181 } else {
2182 set_capacity(disk, 0);
ddd47442
MM		 2183 }
2184
2185 --h->num_luns;
2186 /* zero out the disk size info */
2187 drv->nr_blocks = 0;
2188 drv->block_size = 0;
2189 drv->heads = 0;
2190 drv->sectors = 0;
2191 drv->cylinders = 0;
2192 drv->raid_level = -1; /* This can be used as a flag variable to
2193 * indicate that this element of the drive
2194 * array is free.
7c832835
BH		 2195 */
2196
2197 if (clear_all) {
2198 /* check to see if it was the last disk */
2199 if (drv == h->drv + h->highest_lun) {
2200 /* if so, find the new hightest lun */
2201 int i, newhighest = -1;
a72da29b 2202 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2203 /* if the disk has size > 0, it is available */
ddd47442 2204 if (h->drv[i].heads)
7c832835
BH		 2205 newhighest = i;
2206 }
2207 h->highest_lun = newhighest;
1da177e4 2208 }
ddd47442 2209
7c832835 2210 drv->LunID = 0;
ddd47442 2211 }
e2019b58 2212 return 0;
1da177e4 2213}
ddd47442 2214
b57695fe 2215static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2216 size_t size, __u8 page_code, unsigned char *scsi3addr,
2217 int cmd_type)
1da177e4 2218{
7c832835 2219 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2220 u64bit buff_dma_handle;
2221 int status = IO_OK;
2222
2223 c->cmd_type = CMD_IOCTL_PEND;
2224 c->Header.ReplyQueue = 0;
7c832835 2225 if (buff != NULL) {
1da177e4 2226 c->Header.SGList = 1;
7c832835 2227 c->Header.SGTotal = 1;
1da177e4
LT		 2228 } else {
2229 c->Header.SGList = 0;
7c832835 2230 c->Header.SGTotal = 0;
1da177e4
LT		 2231 }
2232 c->Header.Tag.lower = c->busaddr;
b57695fe 2233 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2234
2235 c->Request.Type.Type = cmd_type;
2236 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2237 switch (cmd) {
2238 case CISS_INQUIRY:
1da177e4 2239 /* are we trying to read a vital product page */
7c832835 2240 if (page_code != 0) {
1da177e4
LT		 2241 c->Request.CDB[1] = 0x01;
2242 c->Request.CDB[2] = page_code;
2243 }
2244 c->Request.CDBLen = 6;
7c832835 2245 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2246 c->Request.Type.Direction = XFER_READ;
2247 c->Request.Timeout = 0;
7c832835
BH		 2248 c->Request.CDB[0] = CISS_INQUIRY;
2249 c->Request.CDB[4] = size & 0xFF;
2250 break;
1da177e4
LT		 2251 case CISS_REPORT_LOG:
2252 case CISS_REPORT_PHYS:
7c832835 2253 /* Talking to controller so It's a physical command
1da177e4 2254 mode = 00 target = 0. Nothing to write.
7c832835 2255 */
1da177e4
LT		 2256 c->Request.CDBLen = 12;
2257 c->Request.Type.Attribute = ATTR_SIMPLE;
2258 c->Request.Type.Direction = XFER_READ;
2259 c->Request.Timeout = 0;
2260 c->Request.CDB[0] = cmd;
7c832835 2261 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2262 c->Request.CDB[7] = (size >> 16) & 0xFF;
2263 c->Request.CDB[8] = (size >> 8) & 0xFF;
2264 c->Request.CDB[9] = size & 0xFF;
2265 break;
2266
2267 case CCISS_READ_CAPACITY:
1da177e4
LT		 2268 c->Request.CDBLen = 10;
2269 c->Request.Type.Attribute = ATTR_SIMPLE;
2270 c->Request.Type.Direction = XFER_READ;
2271 c->Request.Timeout = 0;
2272 c->Request.CDB[0] = cmd;
7c832835 2273 break;
00988a35 2274 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2275 c->Request.CDBLen = 16;
2276 c->Request.Type.Attribute = ATTR_SIMPLE;
2277 c->Request.Type.Direction = XFER_READ;
2278 c->Request.Timeout = 0;
2279 c->Request.CDB[0] = cmd;
2280 c->Request.CDB[1] = 0x10;
2281 c->Request.CDB[10] = (size >> 24) & 0xFF;
2282 c->Request.CDB[11] = (size >> 16) & 0xFF;
2283 c->Request.CDB[12] = (size >> 8) & 0xFF;
2284 c->Request.CDB[13] = size & 0xFF;
2285 c->Request.Timeout = 0;
2286 c->Request.CDB[0] = cmd;
2287 break;
1da177e4
LT		 2288 case CCISS_CACHE_FLUSH:
2289 c->Request.CDBLen = 12;
2290 c->Request.Type.Attribute = ATTR_SIMPLE;
2291 c->Request.Type.Direction = XFER_WRITE;
2292 c->Request.Timeout = 0;
2293 c->Request.CDB[0] = BMIC_WRITE;
2294 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2295 break;
88f627ae 2296 case TEST_UNIT_READY:
88f627ae
SC		 2297 c->Request.CDBLen = 6;
2298 c->Request.Type.Attribute = ATTR_SIMPLE;
2299 c->Request.Type.Direction = XFER_NONE;
2300 c->Request.Timeout = 0;
2301 break;
1da177e4
LT		 2302 default:
2303 printk(KERN_WARNING
7c832835 2304 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2305 return IO_ERROR;
1da177e4
LT		 2306 }
2307 } else if (cmd_type == TYPE_MSG) {
2308 switch (cmd) {
7c832835 2309 case 0: /* ABORT message */
3da8b713 2310 c->Request.CDBLen = 12;
2311 c->Request.Type.Attribute = ATTR_SIMPLE;
2312 c->Request.Type.Direction = XFER_WRITE;
2313 c->Request.Timeout = 0;
7c832835
BH		 2314 c->Request.CDB[0] = cmd; /* abort */
2315 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2316 /* buff contains the tag of the command to abort */
2317 memcpy(&c->Request.CDB[4], buff, 8);
2318 break;
7c832835 2319 case 1: /* RESET message */
88f627ae 2320 c->Request.CDBLen = 16;
3da8b713 2321 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2322 c->Request.Type.Direction = XFER_NONE;
3da8b713 2323 c->Request.Timeout = 0;
2324 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2325 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2326 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2327 break;
1da177e4
LT		 2328 case 3: /* No-Op message */
2329 c->Request.CDBLen = 1;
2330 c->Request.Type.Attribute = ATTR_SIMPLE;
2331 c->Request.Type.Direction = XFER_WRITE;
2332 c->Request.Timeout = 0;
2333 c->Request.CDB[0] = cmd;
2334 break;
2335 default:
2336 printk(KERN_WARNING
7c832835 2337 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2338 return IO_ERROR;
2339 }
2340 } else {
2341 printk(KERN_WARNING
7c832835 2342 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2343 return IO_ERROR;
2344 }
2345 /* Fill in the scatter gather information */
2346 if (size > 0) {
2347 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2348 buff, size,
2349 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2350 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2351 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2352 c->SG[0].Len = size;
7c832835 2353 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2354 }
2355 return status;
2356}
7c832835 2357
3c2ab402 2358static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2359{
2360 switch (c->err_info->ScsiStatus) {
2361 case SAM_STAT_GOOD:
2362 return IO_OK;
2363 case SAM_STAT_CHECK_CONDITION:
2364 switch (0xf & c->err_info->SenseInfo[2]) {
2365 case 0: return IO_OK; /* no sense */
2366 case 1: return IO_OK; /* recovered error */
2367 default:
2368 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2369 "check condition, sense key = 0x%02x\n",
2370 h->ctlr, c->Request.CDB[0],
2371 c->err_info->SenseInfo[2]);
2372 }
2373 break;
2374 default:
2375 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2376 "scsi status = 0x%02x\n", h->ctlr,
2377 c->Request.CDB[0], c->err_info->ScsiStatus);
2378 break;
2379 }
2380 return IO_ERROR;
2381}
2382
789a424a 2383static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2384{
5390cfc3 2385 int return_status = IO_OK;
7c832835 2386
789a424a 2387 if (c->err_info->CommandStatus == CMD_SUCCESS)
2388 return IO_OK;
5390cfc3 2389
2390 switch (c->err_info->CommandStatus) {
2391 case CMD_TARGET_STATUS:
3c2ab402 2392 return_status = check_target_status(h, c);
5390cfc3 2393 break;
2394 case CMD_DATA_UNDERRUN:
2395 case CMD_DATA_OVERRUN:
2396 /* expected for inquiry and report lun commands */
2397 break;
2398 case CMD_INVALID:
789a424a 2399 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2400 "reported invalid\n", c->Request.CDB[0]);
2401 return_status = IO_ERROR;
2402 break;
2403 case CMD_PROTOCOL_ERR:
2404 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2405 "protocol error \n", c->Request.CDB[0]);
2406 return_status = IO_ERROR;
2407 break;
2408 case CMD_HARDWARE_ERR:
2409 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2410 " hardware error\n", c->Request.CDB[0]);
2411 return_status = IO_ERROR;
2412 break;
2413 case CMD_CONNECTION_LOST:
2414 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2415 "connection lost\n", c->Request.CDB[0]);
2416 return_status = IO_ERROR;
2417 break;
2418 case CMD_ABORTED:
2419 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2420 "aborted\n", c->Request.CDB[0]);
2421 return_status = IO_ERROR;
2422 break;
2423 case CMD_ABORT_FAILED:
2424 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2425 "abort failed\n", c->Request.CDB[0]);
2426 return_status = IO_ERROR;
2427 break;
2428 case CMD_UNSOLICITED_ABORT:
2429 printk(KERN_WARNING
2430 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2431 c->Request.CDB[0]);
789a424a 2432 return_status = IO_NEEDS_RETRY;
5390cfc3 2433 break;
2434 default:
2435 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2436 "unknown status %x\n", c->Request.CDB[0],
2437 c->err_info->CommandStatus);
2438 return_status = IO_ERROR;
7c832835 2439 }
789a424a 2440 return return_status;
2441}
2442
2443static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2444 int attempt_retry)
2445{
2446 DECLARE_COMPLETION_ONSTACK(wait);
2447 u64bit buff_dma_handle;
2448 unsigned long flags;
2449 int return_status = IO_OK;
2450
2451resend_cmd2:
2452 c->waiting = &wait;
2453 /* Put the request on the tail of the queue and send it */
2454 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2455 addQ(&h->reqQ, c);
2456 h->Qdepth++;
2457 start_io(h);
2458 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2459
2460 wait_for_completion(&wait);
2461
2462 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2463 goto command_done;
2464
2465 return_status = process_sendcmd_error(h, c);
2466
2467 if (return_status == IO_NEEDS_RETRY &&
2468 c->retry_count < MAX_CMD_RETRIES) {
2469 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2470 c->Request.CDB[0]);
2471 c->retry_count++;
2472 /* erase the old error information */
2473 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2474 return_status = IO_OK;
2475 INIT_COMPLETION(wait);
2476 goto resend_cmd2;
2477 }
5390cfc3 2478
2479command_done:
1da177e4 2480 /* unlock the buffers from DMA */
bb2a37bf
MM		 2481 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2482 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2483 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2484 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2485 return return_status;
2486}
2487
b57695fe 2488static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2489 __u8 page_code, unsigned char scsi3addr[],
2490 int cmd_type)
5390cfc3 2491{
2492 ctlr_info_t *h = hba[ctlr];
2493 CommandList_struct *c;
2494 int return_status;
2495
2496 c = cmd_alloc(h, 0);
2497 if (!c)
2498 return -ENOMEM;
b57695fe 2499 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2500 scsi3addr, cmd_type);
5390cfc3 2501 if (return_status == IO_OK)
789a424a 2502 return_status = sendcmd_withirq_core(h, c, 1);
2503
1da177e4 2504 cmd_free(h, c, 0);
7c832835 2505 return return_status;
1da177e4 2506}
7c832835 2507
1da177e4 2508static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2509 int withirq, sector_t total_size,
7c832835
BH		 2510 unsigned int block_size,
2511 InquiryData_struct *inq_buff,
2512 drive_info_struct *drv)
1da177e4
LT		 2513{
2514 int return_code;
00988a35 2515 unsigned long t;
b57695fe 2516 unsigned char scsi3addr[8];
00988a35 2517
1da177e4 2518 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2519 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2520 if (withirq)
2521 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2522 inq_buff, sizeof(*inq_buff),
2523 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2524 else
2525 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2526 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2527 TYPE_CMD);
1da177e4 2528 if (return_code == IO_OK) {
7c832835 2529 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2530 printk(KERN_WARNING
7c832835
BH		 2531 "cciss: reading geometry failed, volume "
2532 "does not support reading geometry\n");
1da177e4 2533 drv->heads = 255;
7c832835 2534 drv->sectors = 32; // Sectors per track
7f42d3b8 2535 drv->cylinders = total_size + 1;
89f97ad1 2536 drv->raid_level = RAID_UNKNOWN;
1da177e4 2537 } else {
1da177e4
LT		 2538 drv->heads = inq_buff->data_byte[6];
2539 drv->sectors = inq_buff->data_byte[7];
2540 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2541 drv->cylinders += inq_buff->data_byte[5];
2542 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2543 }
2544 drv->block_size = block_size;
97c06978 2545 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2546 t = drv->heads * drv->sectors;
2547 if (t > 1) {
97c06978
MMOD		 2548 sector_t real_size = total_size + 1;
2549 unsigned long rem = sector_div(real_size, t);
3f7705ea 2550 if (rem)
97c06978
MMOD		 2551 real_size++;
2552 drv->cylinders = real_size;
1da177e4 2553 }
7c832835 2554 } else { /* Get geometry failed */
1da177e4
LT		 2555 printk(KERN_WARNING "cciss: reading geometry failed\n");
2556 }
cc088d10 2557 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 2558 drv->heads, drv->sectors, drv->cylinders);
1da177e4 2559}
7c832835 2560
1da177e4 2561static void
00988a35 2562cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2563 unsigned int *block_size)
1da177e4 2564{
00988a35 2565 ReadCapdata_struct *buf;
1da177e4 2566 int return_code;
b57695fe 2567 unsigned char scsi3addr[8];
1aebe187
MK		 2568
2569 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2570 if (!buf) {
00988a35
MMOD		 2571 printk(KERN_WARNING "cciss: out of memory\n");
2572 return;
2573 }
1aebe187 2574
b57695fe 2575 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2576 if (withirq)
2577 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2578 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2579 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2580 else
2581 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2582 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2583 0, scsi3addr, TYPE_CMD);
1da177e4 2584 if (return_code == IO_OK) {
4c1f2b31
AV		 2585 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2586 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2587 } else { /* read capacity command failed */
1da177e4
LT		 2588 printk(KERN_WARNING "cciss: read capacity failed\n");
2589 *total_size = 0;
2590 *block_size = BLOCK_SIZE;
2591 }
97c06978 2592 if (*total_size != 0)
7b92aadf 2593 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2594 (unsigned long long)*total_size+1, *block_size);
00988a35 2595 kfree(buf);
00988a35
MMOD		 2596}
2597
2598static void
2599cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2600{
2601 ReadCapdata_struct_16 *buf;
2602 int return_code;
b57695fe 2603 unsigned char scsi3addr[8];
1aebe187
MK		 2604
2605 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2606 if (!buf) {
00988a35
MMOD		 2607 printk(KERN_WARNING "cciss: out of memory\n");
2608 return;
2609 }
1aebe187 2610
b57695fe 2611 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2612 if (withirq) {
2613 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2614 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2615 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2616 }
2617 else {
2618 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2619 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2620 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2621 }
2622 if (return_code == IO_OK) {
4c1f2b31
AV		 2623 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2624 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2625 } else { /* read capacity command failed */
2626 printk(KERN_WARNING "cciss: read capacity failed\n");
2627 *total_size = 0;
2628 *block_size = BLOCK_SIZE;
2629 }
7b92aadf 2630 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2631 (unsigned long long)*total_size+1, *block_size);
00988a35 2632 kfree(buf);
1da177e4
LT		 2633}
2634
1da177e4
LT		 2635static int cciss_revalidate(struct gendisk *disk)
2636{
2637 ctlr_info_t *h = get_host(disk);
2638 drive_info_struct *drv = get_drv(disk);
2639 int logvol;
7c832835 2640 int FOUND = 0;
1da177e4 2641 unsigned int block_size;
00988a35 2642 sector_t total_size;
1da177e4
LT		 2643 InquiryData_struct *inq_buff = NULL;
2644
7c832835
BH		 2645 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2646 if (h->drv[logvol].LunID == drv->LunID) {
2647 FOUND = 1;
1da177e4
LT		 2648 break;
2649 }
2650 }
2651
7c832835
BH		 2652 if (!FOUND)
2653 return 1;
1da177e4 2654
7c832835
BH		 2655 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2656 if (inq_buff == NULL) {
2657 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2658 return 1;
2659 }
00988a35
MMOD		 2660 if (h->cciss_read == CCISS_READ_10) {
2661 cciss_read_capacity(h->ctlr, logvol, 1,
2662 &total_size, &block_size);
2663 } else {
2664 cciss_read_capacity_16(h->ctlr, logvol, 1,
2665 &total_size, &block_size);
2666 }
7c832835
BH		 2667 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2668 inq_buff, drv);
1da177e4 2669
e1defc4f 2670 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2671 set_capacity(disk, drv->nr_blocks);
2672
1da177e4
LT		 2673 kfree(inq_buff);
2674 return 0;
2675}
2676
2677/*
2678 * Wait polling for a command to complete.
2679 * The memory mapped FIFO is polled for the completion.
2680 * Used only at init time, interrupts from the HBA are disabled.
2681 */
2682static unsigned long pollcomplete(int ctlr)
2683{
2684 unsigned long done;
2685 int i;
2686
2687 /* Wait (up to 20 seconds) for a command to complete */
2688
2689 for (i = 20 * HZ; i > 0; i--) {
2690 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2691 if (done == FIFO_EMPTY)
2692 schedule_timeout_uninterruptible(1);
2693 else
e2019b58 2694 return done;
1da177e4
LT		 2695 }
2696 /* Invalid address to tell caller we ran out of time */
2697 return 1;
2698}
3da8b713 2699
4a4b2d76
SC		 2700/* Send command c to controller h and poll for it to complete.
2701 * Turns interrupts off on the board. Used at driver init time
2702 * and during SCSI error recovery.
1da177e4 2703 */
4a4b2d76 2704static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2705{
1da177e4
LT		 2706 int i;
2707 unsigned long complete;
4a4b2d76 2708 int status = IO_ERROR;
1da177e4 2709 u64bit buff_dma_handle;
1da177e4 2710
4a4b2d76
SC		 2711resend_cmd1:
2712
2713 /* Disable interrupt on the board. */
2714 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2715
1da177e4 2716 /* Make sure there is room in the command FIFO */
7c832835 2717 /* Actually it should be completely empty at this time */
3da8b713 2718 /* unless we are in here doing error handling for the scsi */
2719 /* tape side of the driver. */
7c832835 2720 for (i = 200000; i > 0; i--) {
1da177e4 2721 /* if fifo isn't full go */
4a4b2d76 2722 if (!(h->access.fifo_full(h)))
7c832835 2723 break;
7c832835
BH		 2724 udelay(10);
2725 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2726 " waiting!\n", h->ctlr);
7c832835 2727 }
4a4b2d76 2728 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2729 do {
4a4b2d76 2730 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2731
2732#ifdef CCISS_DEBUG
3da8b713 2733 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2734#endif /* CCISS_DEBUG */
1da177e4 2735
3da8b713 2736 if (complete == 1) {
7c832835
BH		 2737 printk(KERN_WARNING
2738 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2739 "No command list address returned!\n", h->ctlr);
3da8b713 2740 status = IO_ERROR;
3da8b713 2741 break;
2742 }
2743
72f9f132 2744 /* Make sure it's the command we're expecting. */
4a4b2d76 2745 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2746 printk(KERN_WARNING "cciss%d: Unexpected command "
2747 "completion.\n", h->ctlr);
4a4b2d76
SC		 2748 continue;
2749 }
2750
2751 /* It is our command. If no error, we're done. */
2752 if (!(complete & CISS_ERROR_BIT)) {
2753 status = IO_OK;
2754 break;
2755 }
2756
2757 /* There is an error... */
2758
2759 /* if data overrun or underun on Report command ignore it */
2760 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2761 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2762 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2763 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2764 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2765 complete = c->busaddr;
2766 status = IO_OK;
2767 break;
1da177e4 2768 }
4a4b2d76
SC		 2769
2770 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2771 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2772 h->ctlr, c);
2773 if (c->retry_count < MAX_CMD_RETRIES) {
2774 printk(KERN_WARNING "cciss%d: retrying %p\n",
2775 h->ctlr, c);
2776 c->retry_count++;
2777 /* erase the old error information */
2778 memset(c->err_info, 0, sizeof(c->err_info));
2779 goto resend_cmd1;
3da8b713 2780 }
4a4b2d76
SC		 2781 printk(KERN_WARNING "cciss%d: retried %p too many "
2782 "times\n", h->ctlr, c);
2783 status = IO_ERROR;
3c2ab402 2784 break;
4a4b2d76
SC		 2785 }
2786
2787 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2788 printk(KERN_WARNING "cciss%d: command could not be "
2789 "aborted.\n", h->ctlr);
2790 status = IO_ERROR;
3c2ab402 2791 break;
4a4b2d76
SC		 2792 }
2793
4a4b2d76 2794 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2795 status = check_target_status(h, c);
2796 break;
4a4b2d76
SC		 2797 }
2798
3c2ab402 2799 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2800 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2801 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2802 status = IO_ERROR;
3c2ab402 2803 break;
4a4b2d76
SC		 2804
2805 } while (1);
7c832835 2806
1da177e4 2807 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2808 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2809 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2810 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2811 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2812 return status;
2813}
2814
2815/*
2816 * Send a command to the controller, and wait for it to complete.
2817 * Used at init time, and during SCSI error recovery.
2818 */
2819static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2820 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2821{
2822 CommandList_struct *c;
2823 int status;
2824
2825 c = cmd_alloc(hba[ctlr], 1);
2826 if (!c) {
2827 printk(KERN_WARNING "cciss: unable to get memory");
2828 return IO_ERROR;
2829 }
b57695fe 2830 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2831 scsi3addr, cmd_type);
4a4b2d76
SC		 2832 if (status == IO_OK)
2833 status = sendcmd_core(hba[ctlr], c);
2834 cmd_free(hba[ctlr], c, 1);
e2019b58 2835 return status;
7c832835
BH		 2836}
2837
1da177e4
LT		 2838/*
2839 * Map (physical) PCI mem into (virtual) kernel space
2840 */
2841static void __iomem *remap_pci_mem(ulong base, ulong size)
2842{
7c832835
BH		 2843 ulong page_base = ((ulong) base) & PAGE_MASK;
2844 ulong page_offs = ((ulong) base) - page_base;
2845 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2846
7c832835 2847 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2848}
2849
7c832835
BH		 2850/*
2851 * Takes jobs of the Q and sends them to the hardware, then puts it on
2852 * the Q to wait for completion.
2853 */
2854static void start_io(ctlr_info_t *h)
1da177e4
LT		 2855{
2856 CommandList_struct *c;
7c832835 2857
8a3173de
JA		 2858 while (!hlist_empty(&h->reqQ)) {
2859 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2860 /* can't do anything if fifo is full */
2861 if ((h->access.fifo_full(h))) {
2862 printk(KERN_WARNING "cciss: fifo full\n");
2863 break;
2864 }
2865
7c832835 2866 /* Get the first entry from the Request Q */
8a3173de 2867 removeQ(c);
1da177e4 2868 h->Qdepth--;
7c832835
BH		 2869
2870 /* Tell the controller execute command */
1da177e4 2871 h->access.submit_command(h, c);
7c832835
BH		 2872
2873 /* Put job onto the completed Q */
8a3173de 2874 addQ(&h->cmpQ, c);
1da177e4
LT		 2875 }
2876}
7c832835 2877
1da177e4
LT		 2878/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2879/* Zeros out the error record and then resends the command back */
2880/* to the controller */
7c832835 2881static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2882{
2883 /* erase the old error information */
2884 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2885
2886 /* add it to software queue and then send it to the controller */
8a3173de 2887 addQ(&h->reqQ, c);
1da177e4 2888 h->Qdepth++;
7c832835 2889 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2890 h->maxQsinceinit = h->Qdepth;
2891
2892 start_io(h);
2893}
a9925a06 2894
1a614f50
SC		 2895static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2896 unsigned int msg_byte, unsigned int host_byte,
2897 unsigned int driver_byte)
2898{
2899 /* inverse of macros in scsi.h */
2900 return (scsi_status_byte & 0xff) |
2901 ((msg_byte & 0xff) << 8) |
2902 ((host_byte & 0xff) << 16) |
2903 ((driver_byte & 0xff) << 24);
2904}
2905
0a9279cc
MM		 2906static inline int evaluate_target_status(ctlr_info_t *h,
2907 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2908{
2909 unsigned char sense_key;
1a614f50
SC		 2910 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2911 int error_value;
2912
0a9279cc 2913 *retry_cmd = 0;
1a614f50
SC		 2914 /* If we get in here, it means we got "target status", that is, scsi status */
2915 status_byte = cmd->err_info->ScsiStatus;
2916 driver_byte = DRIVER_OK;
2917 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2918
2919 if (blk_pc_request(cmd->rq))
2920 host_byte = DID_PASSTHROUGH;
2921 else
2922 host_byte = DID_OK;
2923
2924 error_value = make_status_bytes(status_byte, msg_byte,
2925 host_byte, driver_byte);
03bbfee5 2926
1a614f50 2927 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2928 if (!blk_pc_request(cmd->rq))
2929 printk(KERN_WARNING "cciss: cmd %p "
2930 "has SCSI Status 0x%x\n",
2931 cmd, cmd->err_info->ScsiStatus);
1a614f50 2932 return error_value;
03bbfee5
MMOD		 2933 }
2934
2935 /* check the sense key */
2936 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2937 /* no status or recovered error */
1a614f50
SC		 2938 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2939 error_value = 0;
03bbfee5 2940
0a9279cc
MM		 2941 if (check_for_unit_attention(h, cmd)) {
2942 *retry_cmd = !blk_pc_request(cmd->rq);
2943 return 0;
2944 }
2945
03bbfee5 2946 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2947 if (error_value != 0)
03bbfee5
MMOD		 2948 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2949 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2950 return error_value;
03bbfee5
MMOD		 2951 }
2952
2953 /* SG_IO or similar, copy sense data back */
2954 if (cmd->rq->sense) {
2955 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2956 cmd->rq->sense_len = cmd->err_info->SenseLen;
2957 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2958 cmd->rq->sense_len);
2959 } else
2960 cmd->rq->sense_len = 0;
2961
1a614f50 2962 return error_value;
03bbfee5
MMOD		 2963}
2964
7c832835 2965/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 2966 * buffers for the completed job. Note that this function does not need
2967 * to hold the hba/queue lock.
7c832835
BH		 2968 */
2969static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2970 int timeout)
1da177e4 2971{
1da177e4 2972 int retry_cmd = 0;
198b7660
MMOD		 2973 struct request *rq = cmd->rq;
2974
2975 rq->errors = 0;
7c832835 2976
1da177e4 2977 if (timeout)
1a614f50 2978 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 2979
d38ae168
MMOD		 2980 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2981 goto after_error_processing;
7c832835 2982
d38ae168 2983 switch (cmd->err_info->CommandStatus) {
d38ae168 2984 case CMD_TARGET_STATUS:
0a9279cc 2985 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 2986 break;
2987 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 2988 if (blk_fs_request(cmd->rq)) {
2989 printk(KERN_WARNING "cciss: cmd %p has"
2990 " completed with data underrun "
2991 "reported\n", cmd);
c3a4d78c 2992 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 2993 }
d38ae168
MMOD		 2994 break;
2995 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 2996 if (blk_fs_request(cmd->rq))
2997 printk(KERN_WARNING "cciss: cmd %p has"
2998 " completed with data overrun "
2999 "reported\n", cmd);
d38ae168
MMOD		 3000 break;
3001 case CMD_INVALID:
3002 printk(KERN_WARNING "cciss: cmd %p is "
3003 "reported invalid\n", cmd);
1a614f50
SC		 3004 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3005 cmd->err_info->CommandStatus, DRIVER_OK,
3006 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3007 break;
3008 case CMD_PROTOCOL_ERR:
3009 printk(KERN_WARNING "cciss: cmd %p has "
3010 "protocol error \n", cmd);
1a614f50
SC		 3011 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3012 cmd->err_info->CommandStatus, DRIVER_OK,
3013 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3014 break;
3015 case CMD_HARDWARE_ERR:
3016 printk(KERN_WARNING "cciss: cmd %p had "
3017 " hardware error\n", cmd);
1a614f50
SC		 3018 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3019 cmd->err_info->CommandStatus, DRIVER_OK,
3020 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3021 break;
3022 case CMD_CONNECTION_LOST:
3023 printk(KERN_WARNING "cciss: cmd %p had "
3024 "connection lost\n", cmd);
1a614f50
SC		 3025 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3026 cmd->err_info->CommandStatus, DRIVER_OK,
3027 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3028 break;
3029 case CMD_ABORTED:
3030 printk(KERN_WARNING "cciss: cmd %p was "
3031 "aborted\n", cmd);
1a614f50
SC		 3032 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3033 cmd->err_info->CommandStatus, DRIVER_OK,
3034 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3035 break;
3036 case CMD_ABORT_FAILED:
3037 printk(KERN_WARNING "cciss: cmd %p reports "
3038 "abort failed\n", cmd);
1a614f50
SC		 3039 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3040 cmd->err_info->CommandStatus, DRIVER_OK,
3041 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3042 break;
3043 case CMD_UNSOLICITED_ABORT:
3044 printk(KERN_WARNING "cciss%d: unsolicited "
3045 "abort %p\n", h->ctlr, cmd);
3046 if (cmd->retry_count < MAX_CMD_RETRIES) {
3047 retry_cmd = 1;
3048 printk(KERN_WARNING
3049 "cciss%d: retrying %p\n", h->ctlr, cmd);
3050 cmd->retry_count++;
3051 } else
3052 printk(KERN_WARNING
3053 "cciss%d: %p retried too "
3054 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3055 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3056 cmd->err_info->CommandStatus, DRIVER_OK,
3057 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3058 break;
3059 case CMD_TIMEOUT:
3060 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3061 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3062 cmd->err_info->CommandStatus, DRIVER_OK,
3063 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3064 break;
3065 default:
3066 printk(KERN_WARNING "cciss: cmd %p returned "
3067 "unknown status %x\n", cmd,
3068 cmd->err_info->CommandStatus);
1a614f50
SC		 3069 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3070 cmd->err_info->CommandStatus, DRIVER_OK,
3071 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3072 }
d38ae168
MMOD		 3073
3074after_error_processing:
3075
1da177e4 3076 /* We need to return this command */
7c832835
BH		 3077 if (retry_cmd) {
3078 resend_cciss_cmd(h, cmd);
1da177e4 3079 return;
7c832835 3080 }
03bbfee5 3081 cmd->rq->completion_data = cmd;
a9925a06 3082 blk_complete_request(cmd->rq);
1da177e4
LT		 3083}
3084
7c832835
BH		 3085/*
3086 * Get a request and submit it to the controller.
1da177e4 3087 */
165125e1 3088static void do_cciss_request(struct request_queue *q)
1da177e4 3089{
7c832835 3090 ctlr_info_t *h = q->queuedata;
1da177e4 3091 CommandList_struct *c;
00988a35
MMOD		 3092 sector_t start_blk;
3093 int seg;
1da177e4
LT		 3094 struct request *creq;
3095 u64bit temp64;
3096 struct scatterlist tmp_sg[MAXSGENTRIES];
3097 drive_info_struct *drv;
3098 int i, dir;
3099
3100 /* We call start_io here in case there is a command waiting on the
3101 * queue that has not been sent.
7c832835 3102 */
1da177e4
LT		 3103 if (blk_queue_plugged(q))
3104 goto startio;
3105
7c832835 3106 queue:
9934c8c0 3107 creq = blk_peek_request(q);
1da177e4
LT		 3108 if (!creq)
3109 goto startio;
3110
089fe1b2 3111 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3112
7c832835 3113 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3114 goto full;
3115
9934c8c0 3116 blk_start_request(creq);
1da177e4
LT		 3117
3118 spin_unlock_irq(q->queue_lock);
3119
3120 c->cmd_type = CMD_RWREQ;
3121 c->rq = creq;
7c832835
BH		 3122
3123 /* fill in the request */
1da177e4 3124 drv = creq->rq_disk->private_data;
7c832835 3125 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3126 /* got command from pool, so use the command block index instead */
3127 /* for direct lookups. */
3128 /* The first 2 bits are reserved for controller error reporting. */
3129 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 3130 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
3131 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 3132 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 3133 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3134 c->Request.Type.Type = TYPE_CMD; // It is a command.
3135 c->Request.Type.Attribute = ATTR_SIMPLE;
3136 c->Request.Type.Direction =
a52de245 3137 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3138 c->Request.Timeout = 0; // Don't time out
3139 c->Request.CDB[0] =
00988a35 3140 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3141 start_blk = blk_rq_pos(creq);
1da177e4 3142#ifdef CCISS_DEBUG
83096ebf
TH		 3143 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3144 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3145#endif /* CCISS_DEBUG */
1da177e4 3146
45711f1a 3147 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3148 seg = blk_rq_map_sg(q, creq, tmp_sg);
3149
7c832835 3150 /* get the DMA records for the setup */
1da177e4
LT		 3151 if (c->Request.Type.Direction == XFER_READ)
3152 dir = PCI_DMA_FROMDEVICE;
3153 else
3154 dir = PCI_DMA_TODEVICE;
3155
7c832835 3156 for (i = 0; i < seg; i++) {
1da177e4 3157 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3158 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3159 tmp_sg[i].offset,
3160 tmp_sg[i].length, dir);
1da177e4 3161 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3162 c->SG[i].Addr.upper = temp64.val32.upper;
3163 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3164 }
7c832835
BH		 3165 /* track how many SG entries we are using */
3166 if (seg > h->maxSG)
3167 h->maxSG = seg;
1da177e4
LT		 3168
3169#ifdef CCISS_DEBUG
83096ebf
TH		 3170 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3171 blk_rq_sectors(creq), seg);
7c832835 3172#endif /* CCISS_DEBUG */
1da177e4
LT		 3173
3174 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3175 if (likely(blk_fs_request(creq))) {
3176 if(h->cciss_read == CCISS_READ_10) {
3177 c->Request.CDB[1] = 0;
3178 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3179 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3180 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3181 c->Request.CDB[5] = start_blk & 0xff;
3182 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3183 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3184 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3185 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3186 } else {
582539e5
RD		 3187 u32 upper32 = upper_32_bits(start_blk);
3188
03bbfee5
MMOD		 3189 c->Request.CDBLen = 16;
3190 c->Request.CDB[1]= 0;
582539e5
RD		 3191 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3192 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3193 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3194 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3195 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3196 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3197 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3198 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3199 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3200 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3201 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3202 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3203 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3204 }
3205 } else if (blk_pc_request(creq)) {
3206 c->Request.CDBLen = creq->cmd_len;
3207 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3208 } else {
03bbfee5
MMOD		 3209 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3210 BUG();
00988a35 3211 }
1da177e4
LT		 3212
3213 spin_lock_irq(q->queue_lock);
3214
8a3173de 3215 addQ(&h->reqQ, c);
1da177e4 3216 h->Qdepth++;
7c832835
BH		 3217 if (h->Qdepth > h->maxQsinceinit)
3218 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3219
3220 goto queue;
00988a35 3221full:
1da177e4 3222 blk_stop_queue(q);
00988a35 3223startio:
1da177e4
LT		 3224 /* We will already have the driver lock here so not need
3225 * to lock it.
7c832835 3226 */
1da177e4
LT		 3227 start_io(h);
3228}
3229
3da8b713 3230static inline unsigned long get_next_completion(ctlr_info_t *h)
3231{
3da8b713 3232 return h->access.command_completed(h);
3da8b713 3233}
3234
3235static inline int interrupt_pending(ctlr_info_t *h)
3236{
3da8b713 3237 return h->access.intr_pending(h);
3da8b713 3238}
3239
3240static inline long interrupt_not_for_us(ctlr_info_t *h)
3241{
7c832835 3242 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3243 (h->interrupts_enabled == 0)));
3da8b713 3244}
3245
7d12e780 3246static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3247{
3248 ctlr_info_t *h = dev_id;
3249 CommandList_struct *c;
3250 unsigned long flags;
33079b21 3251 __u32 a, a1, a2;
1da177e4 3252
3da8b713 3253 if (interrupt_not_for_us(h))
1da177e4 3254 return IRQ_NONE;
1da177e4
LT		 3255 /*
3256 * If there are completed commands in the completion queue,
3257 * we had better do something about it.
3258 */
3259 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3260 while (interrupt_pending(h)) {
7c832835 3261 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3262 a1 = a;
33079b21
MM		 3263 if ((a & 0x04)) {
3264 a2 = (a >> 3);
f880632f 3265 if (a2 >= h->nr_cmds) {
7c832835
BH		 3266 printk(KERN_WARNING
3267 "cciss: controller cciss%d failed, stopping.\n",
3268 h->ctlr);
33079b21
MM		 3269 fail_all_cmds(h->ctlr);
3270 return IRQ_HANDLED;
3271 }
3272
3273 c = h->cmd_pool + a2;
3274 a = c->busaddr;
3275
3276 } else {
8a3173de
JA		 3277 struct hlist_node *tmp;
3278
7c832835 3279 a &= ~3;
8a3173de
JA		 3280 c = NULL;
3281 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3282 if (c->busaddr == a)
7c832835
BH		 3283 break;
3284 }
33079b21 3285 }
1da177e4
LT		 3286 /*
3287 * If we've found the command, take it off the
3288 * completion Q and free it
3289 */
8a3173de
JA		 3290 if (c && c->busaddr == a) {
3291 removeQ(c);
1da177e4
LT		 3292 if (c->cmd_type == CMD_RWREQ) {
3293 complete_command(h, c, 0);
3294 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3295 complete(c->waiting);
3296 }
3297# ifdef CONFIG_CISS_SCSI_TAPE
3298 else if (c->cmd_type == CMD_SCSI)
3299 complete_scsi_command(c, 0, a1);
3300# endif
3301 continue;
3302 }
3303 }
3304 }
3305
1da177e4
LT		 3306 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3307 return IRQ_HANDLED;
3308}
7c832835 3309
b368c9dd
AP		 3310/**
3311 * add_to_scan_list() - add controller to rescan queue
3312 * @h: Pointer to the controller.
3313 *
3314 * Adds the controller to the rescan queue if not already on the queue.
3315 *
3316 * returns 1 if added to the queue, 0 if skipped (could be on the
3317 * queue already, or the controller could be initializing or shutting
3318 * down).
3319 **/
3320static int add_to_scan_list(struct ctlr_info *h)
3321{
3322 struct ctlr_info *test_h;
3323 int found = 0;
3324 int ret = 0;
3325
3326 if (h->busy_initializing)
3327 return 0;
3328
3329 if (!mutex_trylock(&h->busy_shutting_down))
3330 return 0;
3331
3332 mutex_lock(&scan_mutex);
3333 list_for_each_entry(test_h, &scan_q, scan_list) {
3334 if (test_h == h) {
3335 found = 1;
3336 break;
3337 }
3338 }
3339 if (!found && !h->busy_scanning) {
3340 INIT_COMPLETION(h->scan_wait);
3341 list_add_tail(&h->scan_list, &scan_q);
3342 ret = 1;
3343 }
3344 mutex_unlock(&scan_mutex);
3345 mutex_unlock(&h->busy_shutting_down);
3346
3347 return ret;
3348}
3349
3350/**
3351 * remove_from_scan_list() - remove controller from rescan queue
3352 * @h: Pointer to the controller.
3353 *
3354 * Removes the controller from the rescan queue if present. Blocks if
3355 * the controller is currently conducting a rescan.
3356 **/
3357static void remove_from_scan_list(struct ctlr_info *h)
3358{
3359 struct ctlr_info *test_h, *tmp_h;
3360 int scanning = 0;
3361
3362 mutex_lock(&scan_mutex);
3363 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3364 if (test_h == h) {
3365 list_del(&h->scan_list);
3366 complete_all(&h->scan_wait);
3367 mutex_unlock(&scan_mutex);
3368 return;
3369 }
3370 }
3371 if (&h->busy_scanning)
3372 scanning = 0;
3373 mutex_unlock(&scan_mutex);
3374
3375 if (scanning)
3376 wait_for_completion(&h->scan_wait);
3377}
3378
3379/**
3380 * scan_thread() - kernel thread used to rescan controllers
3381 * @data: Ignored.
3382 *
3383 * A kernel thread used scan for drive topology changes on
3384 * controllers. The thread processes only one controller at a time
3385 * using a queue. Controllers are added to the queue using
3386 * add_to_scan_list() and removed from the queue either after done
3387 * processing or using remove_from_scan_list().
3388 *
3389 * returns 0.
3390 **/
0a9279cc
MM		 3391static int scan_thread(void *data)
3392{
b368c9dd 3393 struct ctlr_info *h;
0a9279cc 3394
b368c9dd
AP		 3395 while (1) {
3396 set_current_state(TASK_INTERRUPTIBLE);
3397 schedule();
0a9279cc
MM		 3398 if (kthread_should_stop())
3399 break;
b368c9dd
AP		 3400
3401 while (1) {
3402 mutex_lock(&scan_mutex);
3403 if (list_empty(&scan_q)) {
3404 mutex_unlock(&scan_mutex);
3405 break;
3406 }
3407
3408 h = list_entry(scan_q.next,
3409 struct ctlr_info,
3410 scan_list);
3411 list_del(&h->scan_list);
3412 h->busy_scanning = 1;
3413 mutex_unlock(&scan_mutex);
3414
3415 if (h) {
3416 rebuild_lun_table(h, 0);
3417 complete_all(&h->scan_wait);
3418 mutex_lock(&scan_mutex);
3419 h->busy_scanning = 0;
3420 mutex_unlock(&scan_mutex);
3421 }
3422 }
0a9279cc 3423 }
b368c9dd 3424
0a9279cc
MM		 3425 return 0;
3426}
3427
3428static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3429{
3430 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3431 return 0;
3432
3433 switch (c->err_info->SenseInfo[12]) {
3434 case STATE_CHANGED:
3435 printk(KERN_WARNING "cciss%d: a state change "
3436 "detected, command retried\n", h->ctlr);
3437 return 1;
3438 break;
3439 case LUN_FAILED:
3440 printk(KERN_WARNING "cciss%d: LUN failure "
3441 "detected, action required\n", h->ctlr);
3442 return 1;
3443 break;
3444 case REPORT_LUNS_CHANGED:
3445 printk(KERN_WARNING "cciss%d: report LUN data "
3446 "changed\n", h->ctlr);
b368c9dd
AP		 3447 add_to_scan_list(h);
3448 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3449 return 1;
3450 break;
3451 case POWER_OR_RESET:
3452 printk(KERN_WARNING "cciss%d: a power on "
3453 "or device reset detected\n", h->ctlr);
3454 return 1;
3455 break;
3456 case UNIT_ATTENTION_CLEARED:
3457 printk(KERN_WARNING "cciss%d: unit attention "
3458 "cleared by another initiator\n", h->ctlr);
3459 return 1;
3460 break;
3461 default:
3462 printk(KERN_WARNING "cciss%d: unknown "
3463 "unit attention detected\n", h->ctlr);
3464 return 1;
3465 }
3466}
3467
7c832835 3468/*
d14c4ab5 3469 * We cannot read the structure directly, for portability we must use
1da177e4 3470 * the io functions.
7c832835 3471 * This is for debug only.
1da177e4
LT		 3472 */
3473#ifdef CCISS_DEBUG
7c832835 3474static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3475{
3476 int i;
3477 char temp_name[17];
3478
3479 printk("Controller Configuration information\n");
3480 printk("------------------------------------\n");
7c832835 3481 for (i = 0; i < 4; i++)
1da177e4 3482 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3483 temp_name[4] = '\0';
3484 printk(" Signature = %s\n", temp_name);
1da177e4 3485 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3486 printk(" Transport methods supported = 0x%x\n",
3487 readl(&(tb->TransportSupport)));
3488 printk(" Transport methods active = 0x%x\n",
3489 readl(&(tb->TransportActive)));
3490 printk(" Requested transport Method = 0x%x\n",
3491 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3492 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3493 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3494 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3495 readl(&(tb->HostWrite.CoalIntCount)));
3496 printk(" Max outstanding commands = 0x%d\n",
3497 readl(&(tb->CmdsOutMax)));
3498 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3499 for (i = 0; i < 16; i++)
1da177e4
LT		 3500 temp_name[i] = readb(&(tb->ServerName[i]));
3501 temp_name[16] = '\0';
3502 printk(" Server Name = %s\n", temp_name);
7c832835 3503 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3504}
7c832835 3505#endif /* CCISS_DEBUG */
1da177e4 3506
7c832835 3507static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3508{
3509 int i, offset, mem_type, bar_type;
7c832835 3510 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3511 return 0;
3512 offset = 0;
7c832835
BH		 3513 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3514 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3515 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3516 offset += 4;
3517 else {
3518 mem_type = pci_resource_flags(pdev, i) &
7c832835 3519 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3520 switch (mem_type) {
7c832835
BH		 3521 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3522 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3523 offset += 4; /* 32 bit */
3524 break;
3525 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3526 offset += 8;
3527 break;
3528 default: /* reserved in PCI 2.2 */
3529 printk(KERN_WARNING
3530 "Base address is invalid\n");
3531 return -1;
1da177e4
LT		 3532 break;
3533 }
3534 }
7c832835
BH		 3535 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3536 return i + 1;
1da177e4
LT		 3537 }
3538 return -1;
3539}
3540
fb86a35b
MM		 3541/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3542 * controllers that are capable. If not, we use IO-APIC mode.
3543 */
3544
7c832835
BH		 3545static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3546 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3547{
3548#ifdef CONFIG_PCI_MSI
7c832835
BH		 3549 int err;
3550 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3551 {0, 2}, {0, 3}
3552 };
fb86a35b
MM		 3553
3554 /* Some boards advertise MSI but don't really support it */
3555 if ((board_id == 0x40700E11) ||
7c832835
BH		 3556 (board_id == 0x40800E11) ||
3557 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3558 goto default_int_mode;
3559
7c832835
BH		 3560 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3561 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3562 if (!err) {
3563 c->intr[0] = cciss_msix_entries[0].vector;
3564 c->intr[1] = cciss_msix_entries[1].vector;
3565 c->intr[2] = cciss_msix_entries[2].vector;
3566 c->intr[3] = cciss_msix_entries[3].vector;
3567 c->msix_vector = 1;
3568 return;
3569 }
3570 if (err > 0) {
3571 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3572 "available\n", err);
1ecb9c0f 3573 goto default_int_mode;
7c832835
BH		 3574 } else {
3575 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3576 err);
1ecb9c0f 3577 goto default_int_mode;
7c832835
BH		 3578 }
3579 }
3580 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3581 if (!pci_enable_msi(pdev)) {
7c832835 3582 c->msi_vector = 1;
7c832835
BH		 3583 } else {
3584 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3585 }
3586 }
1ecb9c0f 3587default_int_mode:
7c832835 3588#endif /* CONFIG_PCI_MSI */
fb86a35b 3589 /* if we get here we're going to use the default interrupt mode */
7c832835 3590 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3591 return;
3592}
3593
7d1fd970 3594static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3595{
3596 ushort subsystem_vendor_id, subsystem_device_id, command;
3597 __u32 board_id, scratchpad = 0;
3598 __u64 cfg_offset;
3599 __u32 cfg_base_addr;
3600 __u64 cfg_base_addr_index;
c33ac89b 3601 int i, err;
1da177e4
LT		 3602
3603 /* check to see if controller has been disabled */
3604 /* BEFORE trying to enable it */
7c832835
BH		 3605 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3606 if (!(command & 0x02)) {
3607 printk(KERN_WARNING
3608 "cciss: controller appears to be disabled\n");
c33ac89b 3609 return -ENODEV;
1da177e4
LT		 3610 }
3611
c33ac89b 3612 err = pci_enable_device(pdev);
7c832835 3613 if (err) {
1da177e4 3614 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3615 return err;
1da177e4 3616 }
1da177e4 3617
4e570309
BH		 3618 err = pci_request_regions(pdev, "cciss");
3619 if (err) {
3620 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3621 "aborting\n");
872225ca 3622 return err;
4e570309
BH		 3623 }
3624
1da177e4
LT		 3625 subsystem_vendor_id = pdev->subsystem_vendor;
3626 subsystem_device_id = pdev->subsystem_device;
3627 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3628 subsystem_vendor_id);
1da177e4 3629
1da177e4
LT		 3630#ifdef CCISS_DEBUG
3631 printk("command = %x\n", command);
3632 printk("irq = %x\n", pdev->irq);
3633 printk("board_id = %x\n", board_id);
7c832835 3634#endif /* CCISS_DEBUG */
1da177e4 3635
fb86a35b
MM		 3636/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3637 * else we use the IO-APIC interrupt assigned to us by system ROM.
3638 */
3639 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3640
e1438581
MM		 3641 /* find the memory BAR */
3642 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3643 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3644 break;
3645 }
3646 if (i == DEVICE_COUNT_RESOURCE) {
3647 printk(KERN_WARNING "cciss: No memory BAR found\n");
3648 err = -ENODEV;
3649 goto err_out_free_res;
3650 }
3651
3652 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3653 * already removed
3654 */
1da177e4 3655
1da177e4 3656#ifdef CCISS_DEBUG
9f92f471 3657 printk("address 0 = %lx\n", c->paddr);
7c832835 3658#endif /* CCISS_DEBUG */
a5b92873 3659 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3660
3661 /* Wait for the board to become ready. (PCI hotplug needs this.)
3662 * We poll for up to 120 secs, once per 100ms. */
7c832835 3663 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3664 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3665 if (scratchpad == CCISS_FIRMWARE_READY)
3666 break;
3667 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3668 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3669 }
3670 if (scratchpad != CCISS_FIRMWARE_READY) {
3671 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3672 err = -ENODEV;
4e570309 3673 goto err_out_free_res;
1da177e4
LT		 3674 }
3675
3676 /* get the address index number */
3677 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3678 cfg_base_addr &= (__u32) 0x0000ffff;
3679#ifdef CCISS_DEBUG
3680 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3681#endif /* CCISS_DEBUG */
3682 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3683#ifdef CCISS_DEBUG
9f92f471
RD		 3684 printk("cfg base address index = %llx\n",
3685 (unsigned long long)cfg_base_addr_index);
7c832835 3686#endif /* CCISS_DEBUG */
1da177e4
LT		 3687 if (cfg_base_addr_index == -1) {
3688 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3689 err = -ENODEV;
4e570309 3690 goto err_out_free_res;
1da177e4
LT		 3691 }
3692
3693 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3694#ifdef CCISS_DEBUG
9f92f471 3695 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3696#endif /* CCISS_DEBUG */
3697 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3698 cfg_base_addr_index) +
3699 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3700 c->board_id = board_id;
3701
3702#ifdef CCISS_DEBUG
945f390f 3703 print_cfg_table(c->cfgtable);
7c832835 3704#endif /* CCISS_DEBUG */
1da177e4 3705
49153998
MM		 3706 /* Some controllers support Zero Memory Raid (ZMR).
3707 * When configured in ZMR mode the number of supported
3708 * commands drops to 64. So instead of just setting an
3709 * arbitrary value we make the driver a little smarter.
3710 * We read the config table to tell us how many commands
3711 * are supported on the controller then subtract 4 to
3712 * leave a little room for ioctl calls.
3713 */
3714 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3715 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3716 if (board_id == products[i].board_id) {
3717 c->product_name = products[i].product_name;
3718 c->access = *(products[i].access);
49153998 3719 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3720 break;
3721 }
3722 }
7c832835
BH		 3723 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3724 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3725 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3726 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3727 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3728 err = -ENODEV;
4e570309 3729 goto err_out_free_res;
1da177e4 3730 }
4ff9a9a4
MM		 3731 /* We didn't find the controller in our list. We know the
3732 * signature is valid. If it's an HP device let's try to
3733 * bind to the device and fire it up. Otherwise we bail.
3734 */
3735 if (i == ARRAY_SIZE(products)) {
3736 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3737 c->product_name = products[i-1].product_name;
3738 c->access = *(products[i-1].access);
49153998 3739 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3740 printk(KERN_WARNING "cciss: This is an unknown "
3741 "Smart Array controller.\n"
3742 "cciss: Please update to the latest driver "
3743 "available from www.hp.com.\n");
3744 } else {
3745 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3746 " to access the Smart Array controller %08lx\n"
3747 , (unsigned long)board_id);
3748 err = -ENODEV;
3749 goto err_out_free_res;
3750 }
3751 }
1da177e4 3752#ifdef CONFIG_X86
7c832835
BH		 3753 {
3754 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3755 __u32 prefetch;
3756 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3757 prefetch |= 0x100;
3758 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3759 }
1da177e4
LT		 3760#endif
3761
8bf50f71
MMOD		 3762 /* Disabling DMA prefetch and refetch for the P600.
3763 * An ASIC bug may result in accesses to invalid memory addresses.
3764 * We've disabled prefetch for some time now. Testing with XEN
3765 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3766 */
3767 if(board_id == 0x3225103C) {
3768 __u32 dma_prefetch;
8bf50f71 3769 __u32 dma_refetch;
f92e2f5f
MM		 3770 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3771 dma_prefetch |= 0x8000;
3772 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3773 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3774 dma_refetch |= 0x1;
3775 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3776 }
3777
1da177e4
LT		 3778#ifdef CCISS_DEBUG
3779 printk("Trying to put board into Simple mode\n");
7c832835 3780#endif /* CCISS_DEBUG */
1da177e4 3781 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3782 /* Update the field, and then ring the doorbell */
3783 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3784 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3785
3786 /* under certain very rare conditions, this can take awhile.
3787 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3788 * as we enter this code.) */
7c832835 3789 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3790 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3791 break;
3792 /* delay and try again */
3793 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3794 schedule_timeout(msecs_to_jiffies(1));
7c832835 3795 }
1da177e4
LT		 3796
3797#ifdef CCISS_DEBUG
7c832835
BH		 3798 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3799 readl(c->vaddr + SA5_DOORBELL));
3800#endif /* CCISS_DEBUG */
1da177e4 3801#ifdef CCISS_DEBUG
7c832835
BH		 3802 print_cfg_table(c->cfgtable);
3803#endif /* CCISS_DEBUG */
1da177e4 3804
7c832835 3805 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3806 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3807 " simple mode\n");
c33ac89b 3808 err = -ENODEV;
4e570309 3809 goto err_out_free_res;
1da177e4
LT		 3810 }
3811 return 0;
3812
5faad620 3813err_out_free_res:
872225ca
MM		 3814 /*
3815 * Deliberately omit pci_disable_device(): it does something nasty to
3816 * Smart Array controllers that pci_enable_device does not undo
3817 */
4e570309 3818 pci_release_regions(pdev);
c33ac89b 3819 return err;
1da177e4
LT		 3820}
3821
6ae5ce8e
MM		 3822/* Function to find the first free pointer into our hba[] array
3823 * Returns -1 if no free entries are left.
7c832835 3824 */
1da177e4
LT		 3825static int alloc_cciss_hba(void)
3826{
799202cb 3827 int i;
1da177e4 3828
7c832835 3829 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3830 if (!hba[i]) {
3831 ctlr_info_t *p;
f2912a12 3832
06ff37ff 3833 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3834 if (!p)
3835 goto Enomem;
1da177e4
LT		 3836 hba[i] = p;
3837 return i;
3838 }
3839 }
3840 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3841 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3842 return -1;
3843Enomem:
1da177e4 3844 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3845 return -1;
3846}
3847
3848static void free_hba(int i)
3849{
3850 ctlr_info_t *p = hba[i];
3851 int n;
3852
3853 hba[i] = NULL;
799202cb 3854 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3855 put_disk(p->gendisk[n]);
3856 kfree(p);
3857}
3858
82eb03cf
CC		 3859/* Send a message CDB to the firmware. */
3860static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3861{
3862 typedef struct {
3863 CommandListHeader_struct CommandHeader;
3864 RequestBlock_struct Request;
3865 ErrDescriptor_struct ErrorDescriptor;
3866 } Command;
3867 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3868 Command *cmd;
3869 dma_addr_t paddr64;
3870 uint32_t paddr32, tag;
3871 void __iomem *vaddr;
3872 int i, err;
3873
3874 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3875 if (vaddr == NULL)
3876 return -ENOMEM;
3877
3878 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3879 CCISS commands, so they must be allocated from the lower 4GiB of
3880 memory. */
e930438c 3881 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3882 if (err) {
3883 iounmap(vaddr);
3884 return -ENOMEM;
3885 }
3886
3887 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3888 if (cmd == NULL) {
3889 iounmap(vaddr);
3890 return -ENOMEM;
3891 }
3892
3893 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3894 although there's no guarantee, we assume that the address is at
3895 least 4-byte aligned (most likely, it's page-aligned). */
3896 paddr32 = paddr64;
3897
3898 cmd->CommandHeader.ReplyQueue = 0;
3899 cmd->CommandHeader.SGList = 0;
3900 cmd->CommandHeader.SGTotal = 0;
3901 cmd->CommandHeader.Tag.lower = paddr32;
3902 cmd->CommandHeader.Tag.upper = 0;
3903 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3904
3905 cmd->Request.CDBLen = 16;
3906 cmd->Request.Type.Type = TYPE_MSG;
3907 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3908 cmd->Request.Type.Direction = XFER_NONE;
3909 cmd->Request.Timeout = 0; /* Don't time out */
3910 cmd->Request.CDB[0] = opcode;
3911 cmd->Request.CDB[1] = type;
3912 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3913
3914 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3915 cmd->ErrorDescriptor.Addr.upper = 0;
3916 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3917
3918 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3919
3920 for (i = 0; i < 10; i++) {
3921 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3922 if ((tag & ~3) == paddr32)
3923 break;
3924 schedule_timeout_uninterruptible(HZ);
3925 }
3926
3927 iounmap(vaddr);
3928
3929 /* we leak the DMA buffer here ... no choice since the controller could
3930 still complete the command. */
3931 if (i == 10) {
3932 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3933 opcode, type);
3934 return -ETIMEDOUT;
3935 }
3936
3937 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3938
3939 if (tag & 2) {
3940 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3941 opcode, type);
3942 return -EIO;
3943 }
3944
3945 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3946 opcode, type);
3947 return 0;
3948}
3949
3950#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3951#define cciss_noop(p) cciss_message(p, 3, 0)
3952
3953static __devinit int cciss_reset_msi(struct pci_dev *pdev)
3954{
3955/* the #defines are stolen from drivers/pci/msi.h. */
3956#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
3957#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
3958
3959 int pos;
3960 u16 control = 0;
3961
3962 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3963 if (pos) {
3964 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3965 if (control & PCI_MSI_FLAGS_ENABLE) {
3966 printk(KERN_INFO "cciss: resetting MSI\n");
3967 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
3968 }
3969 }
3970
3971 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3972 if (pos) {
3973 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3974 if (control & PCI_MSIX_FLAGS_ENABLE) {
3975 printk(KERN_INFO "cciss: resetting MSI-X\n");
3976 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
3977 }
3978 }
3979
3980 return 0;
3981}
3982
3983/* This does a hard reset of the controller using PCI power management
3984 * states. */
3985static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
3986{
3987 u16 pmcsr, saved_config_space[32];
3988 int i, pos;
3989
3990 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
3991
3992 /* This is very nearly the same thing as
3993
3994 pci_save_state(pci_dev);
3995 pci_set_power_state(pci_dev, PCI_D3hot);
3996 pci_set_power_state(pci_dev, PCI_D0);
3997 pci_restore_state(pci_dev);
3998
3999 but we can't use these nice canned kernel routines on
4000 kexec, because they also check the MSI/MSI-X state in PCI
4001 configuration space and do the wrong thing when it is
4002 set/cleared. Also, the pci_save/restore_state functions
4003 violate the ordering requirements for restoring the
4004 configuration space from the CCISS document (see the
4005 comment below). So we roll our own .... */
4006
4007 for (i = 0; i < 32; i++)
4008 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4009
4010 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4011 if (pos == 0) {
4012 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4013 return -ENODEV;
4014 }
4015
4016 /* Quoting from the Open CISS Specification: "The Power
4017 * Management Control/Status Register (CSR) controls the power
4018 * state of the device. The normal operating state is D0,
4019 * CSR=00h. The software off state is D3, CSR=03h. To reset
4020 * the controller, place the interface device in D3 then to
4021 * D0, this causes a secondary PCI reset which will reset the
4022 * controller." */
4023
4024 /* enter the D3hot power management state */
4025 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4026 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4027 pmcsr |= PCI_D3hot;
4028 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4029
4030 schedule_timeout_uninterruptible(HZ >> 1);
4031
4032 /* enter the D0 power management state */
4033 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4034 pmcsr |= PCI_D0;
4035 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4036
4037 schedule_timeout_uninterruptible(HZ >> 1);
4038
4039 /* Restore the PCI configuration space. The Open CISS
4040 * Specification says, "Restore the PCI Configuration
4041 * Registers, offsets 00h through 60h. It is important to
4042 * restore the command register, 16-bits at offset 04h,
4043 * last. Do not restore the configuration status register,
4044 * 16-bits at offset 06h." Note that the offset is 2*i. */
4045 for (i = 0; i < 32; i++) {
4046 if (i == 2 || i == 3)
4047 continue;
4048 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4049 }
4050 wmb();
4051 pci_write_config_word(pdev, 4, saved_config_space[2]);
4052
4053 return 0;
4054}
4055
1da177e4
LT		 4056/*
4057 * This is it. Find all the controllers and register them. I really hate
4058 * stealing all these major device numbers.
4059 * returns the number of block devices registered.
4060 */
4061static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4062 const struct pci_device_id *ent)
1da177e4 4063{
1da177e4 4064 int i;
799202cb 4065 int j = 0;
1da177e4 4066 int rc;
22bece00 4067 int dac, return_code;
212a5026 4068 InquiryData_struct *inq_buff;
1da177e4 4069
82eb03cf
CC		 4070 if (reset_devices) {
4071 /* Reset the controller with a PCI power-cycle */
4072 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4073 return -ENODEV;
4074
5e18cfd0
JA		 4075 /* Now try to get the controller to respond to a no-op. Some
4076 devices (notably the HP Smart Array 5i Controller) need
4077 up to 30 seconds to respond. */
5e4c91c8 4078 for (i=0; i<30; i++) {
82eb03cf
CC		 4079 if (cciss_noop(pdev) == 0)
4080 break;
5e4c91c8
JA		 4081
4082 schedule_timeout_uninterruptible(HZ);
4083 }
4084 if (i == 30) {
4085 printk(KERN_ERR "cciss: controller seems dead\n");
4086 return -EBUSY;
82eb03cf
CC		 4087 }
4088 }
4089
1da177e4 4090 i = alloc_cciss_hba();
7c832835 4091 if (i < 0)
e2019b58 4092 return -1;
1f8ef380
MM		 4093
4094 hba[i]->busy_initializing = 1;
8a3173de
JA		 4095 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4096 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4097 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4098
1da177e4 4099 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4100 goto clean0;
1da177e4
LT		 4101
4102 sprintf(hba[i]->devname, "cciss%d", i);
4103 hba[i]->ctlr = i;
4104 hba[i]->pdev = pdev;
4105
b368c9dd
AP		 4106 init_completion(&hba[i]->scan_wait);
4107
7fe06326
AP		 4108 if (cciss_create_hba_sysfs_entry(hba[i]))
4109 goto clean0;
4110
1da177e4 4111 /* configure PCI DMA stuff */
6a35528a 4112 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4113 dac = 1;
284901a9 4114 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4115 dac = 0;
1da177e4 4116 else {
40aabb58 4117 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4118 goto clean1;
4119 }
4120
4121 /*
4122 * register with the major number, or get a dynamic major number
4123 * by passing 0 as argument. This is done for greater than
4124 * 8 controller support.
4125 */
4126 if (i < MAX_CTLR_ORIG)
564de74a 4127 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4128 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4129 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4130 printk(KERN_ERR
7c832835
BH		 4131 "cciss: Unable to get major number %d for %s "
4132 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4133 goto clean1;
7c832835 4134 } else {
1da177e4
LT		 4135 if (i >= MAX_CTLR_ORIG)
4136 hba[i]->major = rc;
4137 }
4138
4139 /* make sure the board interrupts are off */
4140 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4141 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4142 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4143 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4144 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4145 goto clean2;
4146 }
40aabb58
BH		 4147
4148 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4149 hba[i]->devname, pdev->device, pci_name(pdev),
4150 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4151
4152 hba[i]->cmd_pool_bits =
061837bc
JL		 4153 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4154 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4155 hba[i]->cmd_pool = (CommandList_struct *)
4156 pci_alloc_consistent(hba[i]->pdev,
f880632f 4157 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4158 &(hba[i]->cmd_pool_dhandle));
4159 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4160 pci_alloc_consistent(hba[i]->pdev,
f880632f 4161 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4162 &(hba[i]->errinfo_pool_dhandle));
4163 if ((hba[i]->cmd_pool_bits == NULL)
4164 || (hba[i]->cmd_pool == NULL)
4165 || (hba[i]->errinfo_pool == NULL)) {
4166 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4167 goto clean4;
4168 }
1da177e4 4169 spin_lock_init(&hba[i]->lock);
1da177e4 4170
7c832835
BH		 4171 /* Initialize the pdev driver private data.
4172 have it point to hba[i]. */
1da177e4 4173 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4174 /* command and error info recs zeroed out before
4175 they are used */
4176 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4177 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4178 * sizeof(unsigned long));
1da177e4 4179
6ae5ce8e
MM		 4180 hba[i]->num_luns = 0;
4181 hba[i]->highest_lun = -1;
4182 for (j = 0; j < CISS_MAX_LUN; j++) {
4183 hba[i]->drv[j].raid_level = -1;
4184 hba[i]->drv[j].queue = NULL;
4185 hba[i]->gendisk[j] = NULL;
4186 }
1da177e4
LT		 4187
4188 cciss_scsi_setup(i);
4189
4190 /* Turn the interrupts on so we can service requests */
4191 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4192
22bece00
MM		 4193 /* Get the firmware version */
4194 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4195 if (inq_buff == NULL) {
4196 printk(KERN_ERR "cciss: out of memory\n");
4197 goto clean4;
4198 }
4199
4200 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4201 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4202 if (return_code == IO_OK) {
4203 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4204 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4205 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4206 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4207 } else { /* send command failed */
4208 printk(KERN_WARNING "cciss: unable to determine firmware"
4209 " version of controller\n");
4210 }
212a5026 4211 kfree(inq_buff);
22bece00 4212
1da177e4 4213 cciss_procinit(i);
92c4231a
MM		 4214
4215 hba[i]->cciss_max_sectors = 2048;
4216
6ae5ce8e 4217 rebuild_lun_table(hba[i], 1);
b368c9dd 4218 hba[i]->busy_initializing = 0;
e2019b58 4219 return 1;
1da177e4 4220
6ae5ce8e 4221clean4:
6044ec88 4222 kfree(hba[i]->cmd_pool_bits);
7c832835 4223 if (hba[i]->cmd_pool)
1da177e4 4224 pci_free_consistent(hba[i]->pdev,
f880632f 4225 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4226 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4227 if (hba[i]->errinfo_pool)
1da177e4 4228 pci_free_consistent(hba[i]->pdev,
f880632f 4229 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4230 hba[i]->errinfo_pool,
4231 hba[i]->errinfo_pool_dhandle);
fb86a35b 4232 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4233clean2:
1da177e4 4234 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4235clean1:
7fe06326
AP		 4236 cciss_destroy_hba_sysfs_entry(hba[i]);
4237clean0:
1f8ef380 4238 hba[i]->busy_initializing = 0;
799202cb
MM		 4239 /* cleanup any queues that may have been initialized */
4240 for (j=0; j <= hba[i]->highest_lun; j++){
4241 drive_info_struct *drv = &(hba[i]->drv[j]);
4242 if (drv->queue)
4243 blk_cleanup_queue(drv->queue);
4244 }
872225ca
MM		 4245 /*
4246 * Deliberately omit pci_disable_device(): it does something nasty to
4247 * Smart Array controllers that pci_enable_device does not undo
4248 */
799202cb 4249 pci_release_regions(pdev);
799202cb 4250 pci_set_drvdata(pdev, NULL);
61808c2b 4251 free_hba(i);
e2019b58 4252 return -1;
1da177e4
LT		 4253}
4254
e9ca75b5 4255static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4256{
4257 ctlr_info_t *tmp_ptr;
e9ca75b5 4258 int i;
1da177e4 4259 char flush_buf[4];
7c832835 4260 int return_code;
1da177e4 4261
e9ca75b5
GB		 4262 tmp_ptr = pci_get_drvdata(pdev);
4263 if (tmp_ptr == NULL)
4264 return;
4265 i = tmp_ptr->ctlr;
4266 if (hba[i] == NULL)
4267 return;
4268
4269 /* Turn board interrupts off and send the flush cache command */
4270 /* sendcmd will turn off interrupt, and send the flush...
4271 * To write all data in the battery backed cache to disks */
4272 memset(flush_buf, 0, 4);
b57695fe 4273 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4274 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4275 if (return_code == IO_OK) {
4276 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4277 } else {
4278 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4279 }
4280 free_irq(hba[i]->intr[2], hba[i]);
4281}
4282
4283static void __devexit cciss_remove_one(struct pci_dev *pdev)
4284{
4285 ctlr_info_t *tmp_ptr;
4286 int i, j;
4287
7c832835
BH		 4288 if (pci_get_drvdata(pdev) == NULL) {
4289 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4290 return;
4291 }
0a9279cc 4292
1da177e4
LT		 4293 tmp_ptr = pci_get_drvdata(pdev);
4294 i = tmp_ptr->ctlr;
7c832835 4295 if (hba[i] == NULL) {
1da177e4 4296 printk(KERN_ERR "cciss: device appears to "
7c832835 4297 "already be removed \n");
1da177e4
LT		 4298 return;
4299 }
b6550777 4300
b368c9dd 4301 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4302
b368c9dd 4303 remove_from_scan_list(hba[i]);
b6550777
BH		 4304 remove_proc_entry(hba[i]->devname, proc_cciss);
4305 unregister_blkdev(hba[i]->major, hba[i]->devname);
4306
4307 /* remove it from the disk list */
4308 for (j = 0; j < CISS_MAX_LUN; j++) {
4309 struct gendisk *disk = hba[i]->gendisk[j];
4310 if (disk) {
165125e1 4311 struct request_queue *q = disk->queue;
b6550777 4312
097d0264
SC		 4313 if (disk->flags & GENHD_FL_UP) {
4314 cciss_destroy_ld_sysfs_entry(hba[i], j);
b6550777 4315 del_gendisk(disk);
097d0264 4316 }
b6550777
BH		 4317 if (q)
4318 blk_cleanup_queue(q);
4319 }
4320 }
4321
ba198efb 4322#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4323 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4324#endif
b6550777 4325
e9ca75b5 4326 cciss_shutdown(pdev);
fb86a35b
MM		 4327
4328#ifdef CONFIG_PCI_MSI
7c832835
BH		 4329 if (hba[i]->msix_vector)
4330 pci_disable_msix(hba[i]->pdev);
4331 else if (hba[i]->msi_vector)
4332 pci_disable_msi(hba[i]->pdev);
4333#endif /* CONFIG_PCI_MSI */
fb86a35b 4334
1da177e4 4335 iounmap(hba[i]->vaddr);
1da177e4 4336
f880632f 4337 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4338 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4339 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4340 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4341 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4342 /*
4343 * Deliberately omit pci_disable_device(): it does something nasty to
4344 * Smart Array controllers that pci_enable_device does not undo
4345 */
7c832835 4346 pci_release_regions(pdev);
4e570309 4347 pci_set_drvdata(pdev, NULL);
7fe06326 4348 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4349 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4350 free_hba(i);
7c832835 4351}
1da177e4
LT		 4352
4353static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4354 .name = "cciss",
4355 .probe = cciss_init_one,
4356 .remove = __devexit_p(cciss_remove_one),
4357 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4358 .shutdown = cciss_shutdown,
1da177e4
LT		 4359};
4360
4361/*
4362 * This is it. Register the PCI driver information for the cards we control
7c832835 4363 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4364 */
4365static int __init cciss_init(void)
4366{
7fe06326
AP		 4367 int err;
4368
10cbda97
JA		 4369 /*
4370 * The hardware requires that commands are aligned on a 64-bit
4371 * boundary. Given that we use pci_alloc_consistent() to allocate an
4372 * array of them, the size must be a multiple of 8 bytes.
4373 */
4374 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4375
1da177e4
LT		 4376 printk(KERN_INFO DRIVER_NAME "\n");
4377
7fe06326
AP		 4378 err = bus_register(&cciss_bus_type);
4379 if (err)
4380 return err;
4381
b368c9dd
AP		 4382 /* Start the scan thread */
4383 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4384 if (IS_ERR(cciss_scan_thread)) {
4385 err = PTR_ERR(cciss_scan_thread);
4386 goto err_bus_unregister;
4387 }
4388
1da177e4 4389 /* Register for our PCI devices */
7fe06326
AP		 4390 err = pci_register_driver(&cciss_pci_driver);
4391 if (err)
b368c9dd 4392 goto err_thread_stop;
7fe06326 4393
617e1344 4394 return err;
7fe06326 4395
b368c9dd
AP		 4396err_thread_stop:
4397 kthread_stop(cciss_scan_thread);
4398err_bus_unregister:
7fe06326 4399 bus_unregister(&cciss_bus_type);
b368c9dd 4400
7fe06326 4401 return err;
1da177e4
LT		 4402}
4403
4404static void __exit cciss_cleanup(void)
4405{
4406 int i;
4407
4408 pci_unregister_driver(&cciss_pci_driver);
4409 /* double check that all controller entrys have been removed */
7c832835
BH		 4410 for (i = 0; i < MAX_CTLR; i++) {
4411 if (hba[i] != NULL) {
1da177e4 4412 printk(KERN_WARNING "cciss: had to remove"
7c832835 4413 " controller %d\n", i);
1da177e4
LT		 4414 cciss_remove_one(hba[i]->pdev);
4415 }
4416 }
b368c9dd 4417 kthread_stop(cciss_scan_thread);
928b4d8c 4418 remove_proc_entry("driver/cciss", NULL);
7fe06326 4419 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4420}
4421
33079b21
MM		 4422static void fail_all_cmds(unsigned long ctlr)
4423{
4424 /* If we get here, the board is apparently dead. */
4425 ctlr_info_t *h = hba[ctlr];
4426 CommandList_struct *c;
4427 unsigned long flags;
4428
4429 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4430 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4431
4432 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4433
7c832835 4434 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4435
4436 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4437 while (!hlist_empty(&h->reqQ)) {
4438 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4439 removeQ(c);
33079b21 4440 h->Qdepth--;
8a3173de 4441 addQ(&h->cmpQ, c);
33079b21
MM		 4442 }
4443
4444 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4445 while (!hlist_empty(&h->cmpQ)) {
4446 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4447 removeQ(c);
b59e64d0
HR		 4448 if (c->cmd_type != CMD_MSG_STALE)
4449 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4450 if (c->cmd_type == CMD_RWREQ) {
4451 complete_command(h, c, 0);
4452 } else if (c->cmd_type == CMD_IOCTL_PEND)
4453 complete(c->waiting);
4454#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4455 else if (c->cmd_type == CMD_SCSI)
4456 complete_scsi_command(c, 0, 0);
33079b21
MM		 4457#endif
4458 }
4459 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4460 return;
4461}
4462
1da177e4
LT		 4463module_init(cciss_init);
4464module_exit(cciss_cleanup);
Linux kernel - Deliverables
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