2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
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
7 * the Free Software Foundation; version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
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
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
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>
29 #include <linux/smp_lock.h>
30 #include <linux/delay.h>
31 #include <linux/major.h>
33 #include <linux/bio.h>
34 #include <linux/blkpg.h>
35 #include <linux/timer.h>
36 #include <linux/proc_fs.h>
37 #include <linux/seq_file.h>
38 #include <linux/init.h>
39 #include <linux/jiffies.h>
40 #include <linux/hdreg.h>
41 #include <linux/spinlock.h>
42 #include <linux/compat.h>
43 #include <linux/mutex.h>
44 #include <asm/uaccess.h>
47 #include <linux/dma-mapping.h>
48 #include <linux/blkdev.h>
49 #include <linux/genhd.h>
50 #include <linux/completion.h>
51 #include <scsi/scsi.h>
53 #include <scsi/scsi_ioctl.h>
54 #include <linux/cdrom.h>
55 #include <linux/scatterlist.h>
56 #include <linux/kthread.h>
58 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
59 #define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60 #define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
62 /* Embedded module documentation macros - see modules.h */
63 MODULE_AUTHOR("Hewlett-Packard Company");
64 MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
65 MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68 MODULE_VERSION("3.6.20");
69 MODULE_LICENSE("GPL");
71 static int cciss_allow_hpsa
;
72 module_param(cciss_allow_hpsa
, int, S_IRUGO
|S_IWUSR
);
73 MODULE_PARM_DESC(cciss_allow_hpsa
,
74 "Prevent cciss driver from accessing hardware known to be "
75 " supported by the hpsa driver");
77 #include "cciss_cmd.h"
79 #include <linux/cciss_ioctl.h>
81 /* define the PCI info for the cards we can control */
82 static const struct pci_device_id cciss_pci_device_id
[] = {
83 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISS
, 0x0E11, 0x4070},
84 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISSB
, 0x0E11, 0x4080},
85 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISSB
, 0x0E11, 0x4082},
86 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISSB
, 0x0E11, 0x4083},
87 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISSC
, 0x0E11, 0x4091},
88 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISSC
, 0x0E11, 0x409A},
89 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISSC
, 0x0E11, 0x409B},
90 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISSC
, 0x0E11, 0x409C},
91 {PCI_VENDOR_ID_COMPAQ
, PCI_DEVICE_ID_COMPAQ_CISSC
, 0x0E11, 0x409D},
92 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSA
, 0x103C, 0x3225},
93 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSC
, 0x103C, 0x3223},
94 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSC
, 0x103C, 0x3234},
95 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSC
, 0x103C, 0x3235},
96 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSD
, 0x103C, 0x3211},
97 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSD
, 0x103C, 0x3212},
98 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSD
, 0x103C, 0x3213},
99 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSD
, 0x103C, 0x3214},
100 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSD
, 0x103C, 0x3215},
101 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSC
, 0x103C, 0x3237},
102 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSC
, 0x103C, 0x323D},
103 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSE
, 0x103C, 0x3241},
104 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSE
, 0x103C, 0x3243},
105 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSE
, 0x103C, 0x3245},
106 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSE
, 0x103C, 0x3247},
107 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSE
, 0x103C, 0x3249},
108 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSE
, 0x103C, 0x324A},
109 {PCI_VENDOR_ID_HP
, PCI_DEVICE_ID_HP_CISSE
, 0x103C, 0x324B},
113 MODULE_DEVICE_TABLE(pci
, cciss_pci_device_id
);
115 /* board_id = Subsystem Device ID & Vendor ID
116 * product = Marketing Name for the board
117 * access = Address of the struct of function pointers
119 static struct board_type products
[] = {
120 {0x40700E11, "Smart Array 5300", &SA5_access
},
121 {0x40800E11, "Smart Array 5i", &SA5B_access
},
122 {0x40820E11, "Smart Array 532", &SA5B_access
},
123 {0x40830E11, "Smart Array 5312", &SA5B_access
},
124 {0x409A0E11, "Smart Array 641", &SA5_access
},
125 {0x409B0E11, "Smart Array 642", &SA5_access
},
126 {0x409C0E11, "Smart Array 6400", &SA5_access
},
127 {0x409D0E11, "Smart Array 6400 EM", &SA5_access
},
128 {0x40910E11, "Smart Array 6i", &SA5_access
},
129 {0x3225103C, "Smart Array P600", &SA5_access
},
130 {0x3235103C, "Smart Array P400i", &SA5_access
},
131 {0x3211103C, "Smart Array E200i", &SA5_access
},
132 {0x3212103C, "Smart Array E200", &SA5_access
},
133 {0x3213103C, "Smart Array E200i", &SA5_access
},
134 {0x3214103C, "Smart Array E200i", &SA5_access
},
135 {0x3215103C, "Smart Array E200i", &SA5_access
},
136 {0x3237103C, "Smart Array E500", &SA5_access
},
137 /* controllers below this line are also supported by the hpsa driver. */
138 #define HPSA_BOUNDARY 0x3223103C
139 {0x3223103C, "Smart Array P800", &SA5_access
},
140 {0x3234103C, "Smart Array P400", &SA5_access
},
141 {0x323D103C, "Smart Array P700m", &SA5_access
},
142 {0x3241103C, "Smart Array P212", &SA5_access
},
143 {0x3243103C, "Smart Array P410", &SA5_access
},
144 {0x3245103C, "Smart Array P410i", &SA5_access
},
145 {0x3247103C, "Smart Array P411", &SA5_access
},
146 {0x3249103C, "Smart Array P812", &SA5_access
},
147 {0x324A103C, "Smart Array P712m", &SA5_access
},
148 {0x324B103C, "Smart Array P711m", &SA5_access
},
151 /* How long to wait (in milliseconds) for board to go into simple mode */
152 #define MAX_CONFIG_WAIT 30000
153 #define MAX_IOCTL_CONFIG_WAIT 1000
155 /*define how many times we will try a command because of bus resets */
156 #define MAX_CMD_RETRIES 3
160 /* Originally cciss driver only supports 8 major numbers */
161 #define MAX_CTLR_ORIG 8
163 static ctlr_info_t
*hba
[MAX_CTLR
];
165 static struct task_struct
*cciss_scan_thread
;
166 static DEFINE_MUTEX(scan_mutex
);
167 static LIST_HEAD(scan_q
);
169 static void do_cciss_request(struct request_queue
*q
);
170 static irqreturn_t
do_cciss_intr(int irq
, void *dev_id
);
171 static int cciss_open(struct block_device
*bdev
, fmode_t mode
);
172 static int cciss_release(struct gendisk
*disk
, fmode_t mode
);
173 static int cciss_ioctl(struct block_device
*bdev
, fmode_t mode
,
174 unsigned int cmd
, unsigned long arg
);
175 static int cciss_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
);
177 static int cciss_revalidate(struct gendisk
*disk
);
178 static int rebuild_lun_table(ctlr_info_t
*h
, int first_time
, int via_ioctl
);
179 static int deregister_disk(ctlr_info_t
*h
, int drv_index
,
180 int clear_all
, int via_ioctl
);
182 static void cciss_read_capacity(int ctlr
, int logvol
,
183 sector_t
*total_size
, unsigned int *block_size
);
184 static void cciss_read_capacity_16(int ctlr
, int logvol
,
185 sector_t
*total_size
, unsigned int *block_size
);
186 static void cciss_geometry_inquiry(int ctlr
, int logvol
,
188 unsigned int block_size
, InquiryData_struct
*inq_buff
,
189 drive_info_struct
*drv
);
190 static void __devinit
cciss_interrupt_mode(ctlr_info_t
*, struct pci_dev
*,
192 static void start_io(ctlr_info_t
*h
);
193 static int sendcmd_withirq(__u8 cmd
, int ctlr
, void *buff
, size_t size
,
194 __u8 page_code
, unsigned char scsi3addr
[],
196 static int sendcmd_withirq_core(ctlr_info_t
*h
, CommandList_struct
*c
,
198 static int process_sendcmd_error(ctlr_info_t
*h
, CommandList_struct
*c
);
200 static void fail_all_cmds(unsigned long ctlr
);
201 static int add_to_scan_list(struct ctlr_info
*h
);
202 static int scan_thread(void *data
);
203 static int check_for_unit_attention(ctlr_info_t
*h
, CommandList_struct
*c
);
204 static void cciss_hba_release(struct device
*dev
);
205 static void cciss_device_release(struct device
*dev
);
206 static void cciss_free_gendisk(ctlr_info_t
*h
, int drv_index
);
207 static void cciss_free_drive_info(ctlr_info_t
*h
, int drv_index
);
209 #ifdef CONFIG_PROC_FS
210 static void cciss_procinit(int i
);
212 static void cciss_procinit(int i
)
215 #endif /* CONFIG_PROC_FS */
218 static int cciss_compat_ioctl(struct block_device
*, fmode_t
,
219 unsigned, unsigned long);
222 static const struct block_device_operations cciss_fops
= {
223 .owner
= THIS_MODULE
,
225 .release
= cciss_release
,
226 .locked_ioctl
= cciss_ioctl
,
227 .getgeo
= cciss_getgeo
,
229 .compat_ioctl
= cciss_compat_ioctl
,
231 .revalidate_disk
= cciss_revalidate
,
235 * Enqueuing and dequeuing functions for cmdlists.
237 static inline void addQ(struct hlist_head
*list
, CommandList_struct
*c
)
239 hlist_add_head(&c
->list
, list
);
242 static inline void removeQ(CommandList_struct
*c
)
245 * After kexec/dump some commands might still
246 * be in flight, which the firmware will try
247 * to complete. Resetting the firmware doesn't work
248 * with old fw revisions, so we have to mark
249 * them off as 'stale' to prevent the driver from
252 if (WARN_ON(hlist_unhashed(&c
->list
))) {
253 c
->cmd_type
= CMD_MSG_STALE
;
257 hlist_del_init(&c
->list
);
260 #include "cciss_scsi.c" /* For SCSI tape support */
262 static const char *raid_label
[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
265 #define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
267 #ifdef CONFIG_PROC_FS
270 * Report information about this controller.
272 #define ENG_GIG 1000000000
273 #define ENG_GIG_FACTOR (ENG_GIG/512)
274 #define ENGAGE_SCSI "engage scsi"
276 static struct proc_dir_entry
*proc_cciss
;
278 static void cciss_seq_show_header(struct seq_file
*seq
)
280 ctlr_info_t
*h
= seq
->private;
282 seq_printf(seq
, "%s: HP %s Controller\n"
283 "Board ID: 0x%08lx\n"
284 "Firmware Version: %c%c%c%c\n"
286 "Logical drives: %d\n"
287 "Current Q depth: %d\n"
288 "Current # commands on controller: %d\n"
289 "Max Q depth since init: %d\n"
290 "Max # commands on controller since init: %d\n"
291 "Max SG entries since init: %d\n",
294 (unsigned long)h
->board_id
,
295 h
->firm_ver
[0], h
->firm_ver
[1], h
->firm_ver
[2],
296 h
->firm_ver
[3], (unsigned int)h
->intr
[SIMPLE_MODE_INT
],
298 h
->Qdepth
, h
->commands_outstanding
,
299 h
->maxQsinceinit
, h
->max_outstanding
, h
->maxSG
);
301 #ifdef CONFIG_CISS_SCSI_TAPE
302 cciss_seq_tape_report(seq
, h
->ctlr
);
303 #endif /* CONFIG_CISS_SCSI_TAPE */
306 static void *cciss_seq_start(struct seq_file
*seq
, loff_t
*pos
)
308 ctlr_info_t
*h
= seq
->private;
309 unsigned ctlr
= h
->ctlr
;
312 /* prevent displaying bogus info during configuration
313 * or deconfiguration of a logical volume
315 spin_lock_irqsave(CCISS_LOCK(ctlr
), flags
);
316 if (h
->busy_configuring
) {
317 spin_unlock_irqrestore(CCISS_LOCK(ctlr
), flags
);
318 return ERR_PTR(-EBUSY
);
320 h
->busy_configuring
= 1;
321 spin_unlock_irqrestore(CCISS_LOCK(ctlr
), flags
);
324 cciss_seq_show_header(seq
);
329 static int cciss_seq_show(struct seq_file
*seq
, void *v
)
331 sector_t vol_sz
, vol_sz_frac
;
332 ctlr_info_t
*h
= seq
->private;
333 unsigned ctlr
= h
->ctlr
;
335 drive_info_struct
*drv
= h
->drv
[*pos
];
337 if (*pos
> h
->highest_lun
)
340 if (drv
== NULL
) /* it's possible for h->drv[] to have holes. */
346 vol_sz
= drv
->nr_blocks
;
347 vol_sz_frac
= sector_div(vol_sz
, ENG_GIG_FACTOR
);
349 sector_div(vol_sz_frac
, ENG_GIG_FACTOR
);
351 if (drv
->raid_level
< 0 || drv
->raid_level
> RAID_UNKNOWN
)
352 drv
->raid_level
= RAID_UNKNOWN
;
353 seq_printf(seq
, "cciss/c%dd%d:"
354 "\t%4u.%02uGB\tRAID %s\n",
355 ctlr
, (int) *pos
, (int)vol_sz
, (int)vol_sz_frac
,
356 raid_label
[drv
->raid_level
]);
360 static void *cciss_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
362 ctlr_info_t
*h
= seq
->private;
364 if (*pos
> h
->highest_lun
)
371 static void cciss_seq_stop(struct seq_file
*seq
, void *v
)
373 ctlr_info_t
*h
= seq
->private;
375 /* Only reset h->busy_configuring if we succeeded in setting
376 * it during cciss_seq_start. */
377 if (v
== ERR_PTR(-EBUSY
))
380 h
->busy_configuring
= 0;
383 static const struct seq_operations cciss_seq_ops
= {
384 .start
= cciss_seq_start
,
385 .show
= cciss_seq_show
,
386 .next
= cciss_seq_next
,
387 .stop
= cciss_seq_stop
,
390 static int cciss_seq_open(struct inode
*inode
, struct file
*file
)
392 int ret
= seq_open(file
, &cciss_seq_ops
);
393 struct seq_file
*seq
= file
->private_data
;
396 seq
->private = PDE(inode
)->data
;
402 cciss_proc_write(struct file
*file
, const char __user
*buf
,
403 size_t length
, loff_t
*ppos
)
408 #ifndef CONFIG_CISS_SCSI_TAPE
412 if (!buf
|| length
> PAGE_SIZE
- 1)
415 buffer
= (char *)__get_free_page(GFP_KERNEL
);
420 if (copy_from_user(buffer
, buf
, length
))
422 buffer
[length
] = '\0';
424 #ifdef CONFIG_CISS_SCSI_TAPE
425 if (strncmp(ENGAGE_SCSI
, buffer
, sizeof ENGAGE_SCSI
- 1) == 0) {
426 struct seq_file
*seq
= file
->private_data
;
427 ctlr_info_t
*h
= seq
->private;
429 err
= cciss_engage_scsi(h
->ctlr
);
433 #endif /* CONFIG_CISS_SCSI_TAPE */
435 /* might be nice to have "disengage" too, but it's not
436 safely possible. (only 1 module use count, lock issues.) */
439 free_page((unsigned long)buffer
);
443 static const struct file_operations cciss_proc_fops
= {
444 .owner
= THIS_MODULE
,
445 .open
= cciss_seq_open
,
448 .release
= seq_release
,
449 .write
= cciss_proc_write
,
452 static void __devinit
cciss_procinit(int i
)
454 struct proc_dir_entry
*pde
;
456 if (proc_cciss
== NULL
)
457 proc_cciss
= proc_mkdir("driver/cciss", NULL
);
460 pde
= proc_create_data(hba
[i
]->devname
, S_IWUSR
| S_IRUSR
| S_IRGRP
|
462 &cciss_proc_fops
, hba
[i
]);
464 #endif /* CONFIG_PROC_FS */
466 #define MAX_PRODUCT_NAME_LEN 19
468 #define to_hba(n) container_of(n, struct ctlr_info, dev)
469 #define to_drv(n) container_of(n, drive_info_struct, dev)
471 static ssize_t
host_store_rescan(struct device
*dev
,
472 struct device_attribute
*attr
,
473 const char *buf
, size_t count
)
475 struct ctlr_info
*h
= to_hba(dev
);
478 wake_up_process(cciss_scan_thread
);
479 wait_for_completion_interruptible(&h
->scan_wait
);
483 static DEVICE_ATTR(rescan
, S_IWUSR
, NULL
, host_store_rescan
);
485 static ssize_t
dev_show_unique_id(struct device
*dev
,
486 struct device_attribute
*attr
,
489 drive_info_struct
*drv
= to_drv(dev
);
490 struct ctlr_info
*h
= to_hba(drv
->dev
.parent
);
495 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
496 if (h
->busy_configuring
)
499 memcpy(sn
, drv
->serial_no
, sizeof(sn
));
500 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
505 return snprintf(buf
, 16 * 2 + 2,
506 "%02X%02X%02X%02X%02X%02X%02X%02X"
507 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
508 sn
[0], sn
[1], sn
[2], sn
[3],
509 sn
[4], sn
[5], sn
[6], sn
[7],
510 sn
[8], sn
[9], sn
[10], sn
[11],
511 sn
[12], sn
[13], sn
[14], sn
[15]);
513 static DEVICE_ATTR(unique_id
, S_IRUGO
, dev_show_unique_id
, NULL
);
515 static ssize_t
dev_show_vendor(struct device
*dev
,
516 struct device_attribute
*attr
,
519 drive_info_struct
*drv
= to_drv(dev
);
520 struct ctlr_info
*h
= to_hba(drv
->dev
.parent
);
521 char vendor
[VENDOR_LEN
+ 1];
525 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
526 if (h
->busy_configuring
)
529 memcpy(vendor
, drv
->vendor
, VENDOR_LEN
+ 1);
530 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
535 return snprintf(buf
, sizeof(vendor
) + 1, "%s\n", drv
->vendor
);
537 static DEVICE_ATTR(vendor
, S_IRUGO
, dev_show_vendor
, NULL
);
539 static ssize_t
dev_show_model(struct device
*dev
,
540 struct device_attribute
*attr
,
543 drive_info_struct
*drv
= to_drv(dev
);
544 struct ctlr_info
*h
= to_hba(drv
->dev
.parent
);
545 char model
[MODEL_LEN
+ 1];
549 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
550 if (h
->busy_configuring
)
553 memcpy(model
, drv
->model
, MODEL_LEN
+ 1);
554 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
559 return snprintf(buf
, sizeof(model
) + 1, "%s\n", drv
->model
);
561 static DEVICE_ATTR(model
, S_IRUGO
, dev_show_model
, NULL
);
563 static ssize_t
dev_show_rev(struct device
*dev
,
564 struct device_attribute
*attr
,
567 drive_info_struct
*drv
= to_drv(dev
);
568 struct ctlr_info
*h
= to_hba(drv
->dev
.parent
);
569 char rev
[REV_LEN
+ 1];
573 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
574 if (h
->busy_configuring
)
577 memcpy(rev
, drv
->rev
, REV_LEN
+ 1);
578 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
583 return snprintf(buf
, sizeof(rev
) + 1, "%s\n", drv
->rev
);
585 static DEVICE_ATTR(rev
, S_IRUGO
, dev_show_rev
, NULL
);
587 static ssize_t
cciss_show_lunid(struct device
*dev
,
588 struct device_attribute
*attr
, char *buf
)
590 drive_info_struct
*drv
= to_drv(dev
);
591 struct ctlr_info
*h
= to_hba(drv
->dev
.parent
);
593 unsigned char lunid
[8];
595 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
596 if (h
->busy_configuring
) {
597 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
601 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
604 memcpy(lunid
, drv
->LunID
, sizeof(lunid
));
605 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
606 return snprintf(buf
, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
607 lunid
[0], lunid
[1], lunid
[2], lunid
[3],
608 lunid
[4], lunid
[5], lunid
[6], lunid
[7]);
610 static DEVICE_ATTR(lunid
, S_IRUGO
, cciss_show_lunid
, NULL
);
612 static ssize_t
cciss_show_raid_level(struct device
*dev
,
613 struct device_attribute
*attr
, char *buf
)
615 drive_info_struct
*drv
= to_drv(dev
);
616 struct ctlr_info
*h
= to_hba(drv
->dev
.parent
);
620 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
621 if (h
->busy_configuring
) {
622 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
625 raid
= drv
->raid_level
;
626 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
627 if (raid
< 0 || raid
> RAID_UNKNOWN
)
630 return snprintf(buf
, strlen(raid_label
[raid
]) + 7, "RAID %s\n",
633 static DEVICE_ATTR(raid_level
, S_IRUGO
, cciss_show_raid_level
, NULL
);
635 static ssize_t
cciss_show_usage_count(struct device
*dev
,
636 struct device_attribute
*attr
, char *buf
)
638 drive_info_struct
*drv
= to_drv(dev
);
639 struct ctlr_info
*h
= to_hba(drv
->dev
.parent
);
643 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
644 if (h
->busy_configuring
) {
645 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
648 count
= drv
->usage_count
;
649 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
650 return snprintf(buf
, 20, "%d\n", count
);
652 static DEVICE_ATTR(usage_count
, S_IRUGO
, cciss_show_usage_count
, NULL
);
654 static struct attribute
*cciss_host_attrs
[] = {
655 &dev_attr_rescan
.attr
,
659 static struct attribute_group cciss_host_attr_group
= {
660 .attrs
= cciss_host_attrs
,
663 static const struct attribute_group
*cciss_host_attr_groups
[] = {
664 &cciss_host_attr_group
,
668 static struct device_type cciss_host_type
= {
669 .name
= "cciss_host",
670 .groups
= cciss_host_attr_groups
,
671 .release
= cciss_hba_release
,
674 static struct attribute
*cciss_dev_attrs
[] = {
675 &dev_attr_unique_id
.attr
,
676 &dev_attr_model
.attr
,
677 &dev_attr_vendor
.attr
,
679 &dev_attr_lunid
.attr
,
680 &dev_attr_raid_level
.attr
,
681 &dev_attr_usage_count
.attr
,
685 static struct attribute_group cciss_dev_attr_group
= {
686 .attrs
= cciss_dev_attrs
,
689 static const struct attribute_group
*cciss_dev_attr_groups
[] = {
690 &cciss_dev_attr_group
,
694 static struct device_type cciss_dev_type
= {
695 .name
= "cciss_device",
696 .groups
= cciss_dev_attr_groups
,
697 .release
= cciss_device_release
,
700 static struct bus_type cciss_bus_type
= {
705 * cciss_hba_release is called when the reference count
706 * of h->dev goes to zero.
708 static void cciss_hba_release(struct device
*dev
)
711 * nothing to do, but need this to avoid a warning
712 * about not having a release handler from lib/kref.c.
717 * Initialize sysfs entry for each controller. This sets up and registers
718 * the 'cciss#' directory for each individual controller under
719 * /sys/bus/pci/devices/<dev>/.
721 static int cciss_create_hba_sysfs_entry(struct ctlr_info
*h
)
723 device_initialize(&h
->dev
);
724 h
->dev
.type
= &cciss_host_type
;
725 h
->dev
.bus
= &cciss_bus_type
;
726 dev_set_name(&h
->dev
, "%s", h
->devname
);
727 h
->dev
.parent
= &h
->pdev
->dev
;
729 return device_add(&h
->dev
);
733 * Remove sysfs entries for an hba.
735 static void cciss_destroy_hba_sysfs_entry(struct ctlr_info
*h
)
738 put_device(&h
->dev
); /* final put. */
741 /* cciss_device_release is called when the reference count
742 * of h->drv[x]dev goes to zero.
744 static void cciss_device_release(struct device
*dev
)
746 drive_info_struct
*drv
= to_drv(dev
);
751 * Initialize sysfs for each logical drive. This sets up and registers
752 * the 'c#d#' directory for each individual logical drive under
753 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
754 * /sys/block/cciss!c#d# to this entry.
756 static long cciss_create_ld_sysfs_entry(struct ctlr_info
*h
,
761 if (h
->drv
[drv_index
]->device_initialized
)
764 dev
= &h
->drv
[drv_index
]->dev
;
765 device_initialize(dev
);
766 dev
->type
= &cciss_dev_type
;
767 dev
->bus
= &cciss_bus_type
;
768 dev_set_name(dev
, "c%dd%d", h
->ctlr
, drv_index
);
769 dev
->parent
= &h
->dev
;
770 h
->drv
[drv_index
]->device_initialized
= 1;
771 return device_add(dev
);
775 * Remove sysfs entries for a logical drive.
777 static void cciss_destroy_ld_sysfs_entry(struct ctlr_info
*h
, int drv_index
,
780 struct device
*dev
= &h
->drv
[drv_index
]->dev
;
782 /* special case for c*d0, we only destroy it on controller exit */
783 if (drv_index
== 0 && !ctlr_exiting
)
787 put_device(dev
); /* the "final" put. */
788 h
->drv
[drv_index
] = NULL
;
792 * For operations that cannot sleep, a command block is allocated at init,
793 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
794 * which ones are free or in use. For operations that can wait for kmalloc
795 * to possible sleep, this routine can be called with get_from_pool set to 0.
796 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
798 static CommandList_struct
*cmd_alloc(ctlr_info_t
*h
, int get_from_pool
)
800 CommandList_struct
*c
;
803 dma_addr_t cmd_dma_handle
, err_dma_handle
;
805 if (!get_from_pool
) {
806 c
= (CommandList_struct
*) pci_alloc_consistent(h
->pdev
,
807 sizeof(CommandList_struct
), &cmd_dma_handle
);
810 memset(c
, 0, sizeof(CommandList_struct
));
814 c
->err_info
= (ErrorInfo_struct
*)
815 pci_alloc_consistent(h
->pdev
, sizeof(ErrorInfo_struct
),
818 if (c
->err_info
== NULL
) {
819 pci_free_consistent(h
->pdev
,
820 sizeof(CommandList_struct
), c
, cmd_dma_handle
);
823 memset(c
->err_info
, 0, sizeof(ErrorInfo_struct
));
824 } else { /* get it out of the controllers pool */
827 i
= find_first_zero_bit(h
->cmd_pool_bits
, h
->nr_cmds
);
830 } while (test_and_set_bit
831 (i
& (BITS_PER_LONG
- 1),
832 h
->cmd_pool_bits
+ (i
/ BITS_PER_LONG
)) != 0);
834 printk(KERN_DEBUG
"cciss: using command buffer %d\n", i
);
837 memset(c
, 0, sizeof(CommandList_struct
));
838 cmd_dma_handle
= h
->cmd_pool_dhandle
839 + i
* sizeof(CommandList_struct
);
840 c
->err_info
= h
->errinfo_pool
+ i
;
841 memset(c
->err_info
, 0, sizeof(ErrorInfo_struct
));
842 err_dma_handle
= h
->errinfo_pool_dhandle
843 + i
* sizeof(ErrorInfo_struct
);
849 INIT_HLIST_NODE(&c
->list
);
850 c
->busaddr
= (__u32
) cmd_dma_handle
;
851 temp64
.val
= (__u64
) err_dma_handle
;
852 c
->ErrDesc
.Addr
.lower
= temp64
.val32
.lower
;
853 c
->ErrDesc
.Addr
.upper
= temp64
.val32
.upper
;
854 c
->ErrDesc
.Len
= sizeof(ErrorInfo_struct
);
861 * Frees a command block that was previously allocated with cmd_alloc().
863 static void cmd_free(ctlr_info_t
*h
, CommandList_struct
*c
, int got_from_pool
)
868 if (!got_from_pool
) {
869 temp64
.val32
.lower
= c
->ErrDesc
.Addr
.lower
;
870 temp64
.val32
.upper
= c
->ErrDesc
.Addr
.upper
;
871 pci_free_consistent(h
->pdev
, sizeof(ErrorInfo_struct
),
872 c
->err_info
, (dma_addr_t
) temp64
.val
);
873 pci_free_consistent(h
->pdev
, sizeof(CommandList_struct
),
874 c
, (dma_addr_t
) c
->busaddr
);
877 clear_bit(i
& (BITS_PER_LONG
- 1),
878 h
->cmd_pool_bits
+ (i
/ BITS_PER_LONG
));
883 static inline ctlr_info_t
*get_host(struct gendisk
*disk
)
885 return disk
->queue
->queuedata
;
888 static inline drive_info_struct
*get_drv(struct gendisk
*disk
)
890 return disk
->private_data
;
894 * Open. Make sure the device is really there.
896 static int cciss_open(struct block_device
*bdev
, fmode_t mode
)
898 ctlr_info_t
*host
= get_host(bdev
->bd_disk
);
899 drive_info_struct
*drv
= get_drv(bdev
->bd_disk
);
902 printk(KERN_DEBUG
"cciss_open %s\n", bdev
->bd_disk
->disk_name
);
903 #endif /* CCISS_DEBUG */
905 if (drv
->busy_configuring
)
908 * Root is allowed to open raw volume zero even if it's not configured
909 * so array config can still work. Root is also allowed to open any
910 * volume that has a LUN ID, so it can issue IOCTL to reread the
911 * disk information. I don't think I really like this
912 * but I'm already using way to many device nodes to claim another one
913 * for "raw controller".
915 if (drv
->heads
== 0) {
916 if (MINOR(bdev
->bd_dev
) != 0) { /* not node 0? */
917 /* if not node 0 make sure it is a partition = 0 */
918 if (MINOR(bdev
->bd_dev
) & 0x0f) {
920 /* if it is, make sure we have a LUN ID */
921 } else if (memcmp(drv
->LunID
, CTLR_LUNID
,
922 sizeof(drv
->LunID
))) {
926 if (!capable(CAP_SYS_ADMIN
))
937 static int cciss_release(struct gendisk
*disk
, fmode_t mode
)
939 ctlr_info_t
*host
= get_host(disk
);
940 drive_info_struct
*drv
= get_drv(disk
);
943 printk(KERN_DEBUG
"cciss_release %s\n", disk
->disk_name
);
944 #endif /* CCISS_DEBUG */
953 static int do_ioctl(struct block_device
*bdev
, fmode_t mode
,
954 unsigned cmd
, unsigned long arg
)
958 ret
= cciss_ioctl(bdev
, mode
, cmd
, arg
);
963 static int cciss_ioctl32_passthru(struct block_device
*bdev
, fmode_t mode
,
964 unsigned cmd
, unsigned long arg
);
965 static int cciss_ioctl32_big_passthru(struct block_device
*bdev
, fmode_t mode
,
966 unsigned cmd
, unsigned long arg
);
968 static int cciss_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
969 unsigned cmd
, unsigned long arg
)
972 case CCISS_GETPCIINFO
:
973 case CCISS_GETINTINFO
:
974 case CCISS_SETINTINFO
:
975 case CCISS_GETNODENAME
:
976 case CCISS_SETNODENAME
:
977 case CCISS_GETHEARTBEAT
:
978 case CCISS_GETBUSTYPES
:
979 case CCISS_GETFIRMVER
:
980 case CCISS_GETDRIVVER
:
981 case CCISS_REVALIDVOLS
:
982 case CCISS_DEREGDISK
:
983 case CCISS_REGNEWDISK
:
985 case CCISS_RESCANDISK
:
986 case CCISS_GETLUNINFO
:
987 return do_ioctl(bdev
, mode
, cmd
, arg
);
989 case CCISS_PASSTHRU32
:
990 return cciss_ioctl32_passthru(bdev
, mode
, cmd
, arg
);
991 case CCISS_BIG_PASSTHRU32
:
992 return cciss_ioctl32_big_passthru(bdev
, mode
, cmd
, arg
);
999 static int cciss_ioctl32_passthru(struct block_device
*bdev
, fmode_t mode
,
1000 unsigned cmd
, unsigned long arg
)
1002 IOCTL32_Command_struct __user
*arg32
=
1003 (IOCTL32_Command_struct __user
*) arg
;
1004 IOCTL_Command_struct arg64
;
1005 IOCTL_Command_struct __user
*p
= compat_alloc_user_space(sizeof(arg64
));
1011 copy_from_user(&arg64
.LUN_info
, &arg32
->LUN_info
,
1012 sizeof(arg64
.LUN_info
));
1014 copy_from_user(&arg64
.Request
, &arg32
->Request
,
1015 sizeof(arg64
.Request
));
1017 copy_from_user(&arg64
.error_info
, &arg32
->error_info
,
1018 sizeof(arg64
.error_info
));
1019 err
|= get_user(arg64
.buf_size
, &arg32
->buf_size
);
1020 err
|= get_user(cp
, &arg32
->buf
);
1021 arg64
.buf
= compat_ptr(cp
);
1022 err
|= copy_to_user(p
, &arg64
, sizeof(arg64
));
1027 err
= do_ioctl(bdev
, mode
, CCISS_PASSTHRU
, (unsigned long)p
);
1031 copy_in_user(&arg32
->error_info
, &p
->error_info
,
1032 sizeof(arg32
->error_info
));
1038 static int cciss_ioctl32_big_passthru(struct block_device
*bdev
, fmode_t mode
,
1039 unsigned cmd
, unsigned long arg
)
1041 BIG_IOCTL32_Command_struct __user
*arg32
=
1042 (BIG_IOCTL32_Command_struct __user
*) arg
;
1043 BIG_IOCTL_Command_struct arg64
;
1044 BIG_IOCTL_Command_struct __user
*p
=
1045 compat_alloc_user_space(sizeof(arg64
));
1051 copy_from_user(&arg64
.LUN_info
, &arg32
->LUN_info
,
1052 sizeof(arg64
.LUN_info
));
1054 copy_from_user(&arg64
.Request
, &arg32
->Request
,
1055 sizeof(arg64
.Request
));
1057 copy_from_user(&arg64
.error_info
, &arg32
->error_info
,
1058 sizeof(arg64
.error_info
));
1059 err
|= get_user(arg64
.buf_size
, &arg32
->buf_size
);
1060 err
|= get_user(arg64
.malloc_size
, &arg32
->malloc_size
);
1061 err
|= get_user(cp
, &arg32
->buf
);
1062 arg64
.buf
= compat_ptr(cp
);
1063 err
|= copy_to_user(p
, &arg64
, sizeof(arg64
));
1068 err
= do_ioctl(bdev
, mode
, CCISS_BIG_PASSTHRU
, (unsigned long)p
);
1072 copy_in_user(&arg32
->error_info
, &p
->error_info
,
1073 sizeof(arg32
->error_info
));
1080 static int cciss_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1082 drive_info_struct
*drv
= get_drv(bdev
->bd_disk
);
1084 if (!drv
->cylinders
)
1087 geo
->heads
= drv
->heads
;
1088 geo
->sectors
= drv
->sectors
;
1089 geo
->cylinders
= drv
->cylinders
;
1093 static void check_ioctl_unit_attention(ctlr_info_t
*host
, CommandList_struct
*c
)
1095 if (c
->err_info
->CommandStatus
== CMD_TARGET_STATUS
&&
1096 c
->err_info
->ScsiStatus
!= SAM_STAT_CHECK_CONDITION
)
1097 (void)check_for_unit_attention(host
, c
);
1102 static int cciss_ioctl(struct block_device
*bdev
, fmode_t mode
,
1103 unsigned int cmd
, unsigned long arg
)
1105 struct gendisk
*disk
= bdev
->bd_disk
;
1106 ctlr_info_t
*host
= get_host(disk
);
1107 drive_info_struct
*drv
= get_drv(disk
);
1108 int ctlr
= host
->ctlr
;
1109 void __user
*argp
= (void __user
*)arg
;
1112 printk(KERN_DEBUG
"cciss_ioctl: Called with cmd=%x %lx\n", cmd
, arg
);
1113 #endif /* CCISS_DEBUG */
1116 case CCISS_GETPCIINFO
:
1118 cciss_pci_info_struct pciinfo
;
1122 pciinfo
.domain
= pci_domain_nr(host
->pdev
->bus
);
1123 pciinfo
.bus
= host
->pdev
->bus
->number
;
1124 pciinfo
.dev_fn
= host
->pdev
->devfn
;
1125 pciinfo
.board_id
= host
->board_id
;
1127 (argp
, &pciinfo
, sizeof(cciss_pci_info_struct
)))
1131 case CCISS_GETINTINFO
:
1133 cciss_coalint_struct intinfo
;
1137 readl(&host
->cfgtable
->HostWrite
.CoalIntDelay
);
1139 readl(&host
->cfgtable
->HostWrite
.CoalIntCount
);
1141 (argp
, &intinfo
, sizeof(cciss_coalint_struct
)))
1145 case CCISS_SETINTINFO
:
1147 cciss_coalint_struct intinfo
;
1148 unsigned long flags
;
1153 if (!capable(CAP_SYS_ADMIN
))
1156 (&intinfo
, argp
, sizeof(cciss_coalint_struct
)))
1158 if ((intinfo
.delay
== 0) && (intinfo
.count
== 0))
1160 // printk("cciss_ioctl: delay and count cannot be 0\n");
1163 spin_lock_irqsave(CCISS_LOCK(ctlr
), flags
);
1164 /* Update the field, and then ring the doorbell */
1165 writel(intinfo
.delay
,
1166 &(host
->cfgtable
->HostWrite
.CoalIntDelay
));
1167 writel(intinfo
.count
,
1168 &(host
->cfgtable
->HostWrite
.CoalIntCount
));
1169 writel(CFGTBL_ChangeReq
, host
->vaddr
+ SA5_DOORBELL
);
1171 for (i
= 0; i
< MAX_IOCTL_CONFIG_WAIT
; i
++) {
1172 if (!(readl(host
->vaddr
+ SA5_DOORBELL
)
1173 & CFGTBL_ChangeReq
))
1175 /* delay and try again */
1178 spin_unlock_irqrestore(CCISS_LOCK(ctlr
), flags
);
1179 if (i
>= MAX_IOCTL_CONFIG_WAIT
)
1183 case CCISS_GETNODENAME
:
1185 NodeName_type NodeName
;
1190 for (i
= 0; i
< 16; i
++)
1192 readb(&host
->cfgtable
->ServerName
[i
]);
1193 if (copy_to_user(argp
, NodeName
, sizeof(NodeName_type
)))
1197 case CCISS_SETNODENAME
:
1199 NodeName_type NodeName
;
1200 unsigned long flags
;
1205 if (!capable(CAP_SYS_ADMIN
))
1209 (NodeName
, argp
, sizeof(NodeName_type
)))
1212 spin_lock_irqsave(CCISS_LOCK(ctlr
), flags
);
1214 /* Update the field, and then ring the doorbell */
1215 for (i
= 0; i
< 16; i
++)
1217 &host
->cfgtable
->ServerName
[i
]);
1219 writel(CFGTBL_ChangeReq
, host
->vaddr
+ SA5_DOORBELL
);
1221 for (i
= 0; i
< MAX_IOCTL_CONFIG_WAIT
; i
++) {
1222 if (!(readl(host
->vaddr
+ SA5_DOORBELL
)
1223 & CFGTBL_ChangeReq
))
1225 /* delay and try again */
1228 spin_unlock_irqrestore(CCISS_LOCK(ctlr
), flags
);
1229 if (i
>= MAX_IOCTL_CONFIG_WAIT
)
1234 case CCISS_GETHEARTBEAT
:
1236 Heartbeat_type heartbeat
;
1240 heartbeat
= readl(&host
->cfgtable
->HeartBeat
);
1242 (argp
, &heartbeat
, sizeof(Heartbeat_type
)))
1246 case CCISS_GETBUSTYPES
:
1248 BusTypes_type BusTypes
;
1252 BusTypes
= readl(&host
->cfgtable
->BusTypes
);
1254 (argp
, &BusTypes
, sizeof(BusTypes_type
)))
1258 case CCISS_GETFIRMVER
:
1260 FirmwareVer_type firmware
;
1264 memcpy(firmware
, host
->firm_ver
, 4);
1267 (argp
, firmware
, sizeof(FirmwareVer_type
)))
1271 case CCISS_GETDRIVVER
:
1273 DriverVer_type DriverVer
= DRIVER_VERSION
;
1279 (argp
, &DriverVer
, sizeof(DriverVer_type
)))
1284 case CCISS_DEREGDISK
:
1286 case CCISS_REVALIDVOLS
:
1287 return rebuild_lun_table(host
, 0, 1);
1289 case CCISS_GETLUNINFO
:{
1290 LogvolInfo_struct luninfo
;
1292 memcpy(&luninfo
.LunID
, drv
->LunID
,
1293 sizeof(luninfo
.LunID
));
1294 luninfo
.num_opens
= drv
->usage_count
;
1295 luninfo
.num_parts
= 0;
1296 if (copy_to_user(argp
, &luninfo
,
1297 sizeof(LogvolInfo_struct
)))
1301 case CCISS_PASSTHRU
:
1303 IOCTL_Command_struct iocommand
;
1304 CommandList_struct
*c
;
1307 unsigned long flags
;
1308 DECLARE_COMPLETION_ONSTACK(wait
);
1313 if (!capable(CAP_SYS_RAWIO
))
1317 (&iocommand
, argp
, sizeof(IOCTL_Command_struct
)))
1319 if ((iocommand
.buf_size
< 1) &&
1320 (iocommand
.Request
.Type
.Direction
!= XFER_NONE
)) {
1323 #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1324 /* Check kmalloc limits */
1325 if (iocommand
.buf_size
> 128000)
1328 if (iocommand
.buf_size
> 0) {
1329 buff
= kmalloc(iocommand
.buf_size
, GFP_KERNEL
);
1333 if (iocommand
.Request
.Type
.Direction
== XFER_WRITE
) {
1334 /* Copy the data into the buffer we created */
1336 (buff
, iocommand
.buf
, iocommand
.buf_size
)) {
1341 memset(buff
, 0, iocommand
.buf_size
);
1343 if ((c
= cmd_alloc(host
, 0)) == NULL
) {
1347 /* Fill in the command type */
1348 c
->cmd_type
= CMD_IOCTL_PEND
;
1349 /* Fill in Command Header */
1350 c
->Header
.ReplyQueue
= 0; /* unused in simple mode */
1351 if (iocommand
.buf_size
> 0) /* buffer to fill */
1353 c
->Header
.SGList
= 1;
1354 c
->Header
.SGTotal
= 1;
1355 } else /* no buffers to fill */
1357 c
->Header
.SGList
= 0;
1358 c
->Header
.SGTotal
= 0;
1360 c
->Header
.LUN
= iocommand
.LUN_info
;
1361 /* use the kernel address the cmd block for tag */
1362 c
->Header
.Tag
.lower
= c
->busaddr
;
1364 /* Fill in Request block */
1365 c
->Request
= iocommand
.Request
;
1367 /* Fill in the scatter gather information */
1368 if (iocommand
.buf_size
> 0) {
1369 temp64
.val
= pci_map_single(host
->pdev
, buff
,
1371 PCI_DMA_BIDIRECTIONAL
);
1372 c
->SG
[0].Addr
.lower
= temp64
.val32
.lower
;
1373 c
->SG
[0].Addr
.upper
= temp64
.val32
.upper
;
1374 c
->SG
[0].Len
= iocommand
.buf_size
;
1375 c
->SG
[0].Ext
= 0; /* we are not chaining */
1379 /* Put the request on the tail of the request queue */
1380 spin_lock_irqsave(CCISS_LOCK(ctlr
), flags
);
1381 addQ(&host
->reqQ
, c
);
1384 spin_unlock_irqrestore(CCISS_LOCK(ctlr
), flags
);
1386 wait_for_completion(&wait
);
1388 /* unlock the buffers from DMA */
1389 temp64
.val32
.lower
= c
->SG
[0].Addr
.lower
;
1390 temp64
.val32
.upper
= c
->SG
[0].Addr
.upper
;
1391 pci_unmap_single(host
->pdev
, (dma_addr_t
) temp64
.val
,
1393 PCI_DMA_BIDIRECTIONAL
);
1395 check_ioctl_unit_attention(host
, c
);
1397 /* Copy the error information out */
1398 iocommand
.error_info
= *(c
->err_info
);
1400 (argp
, &iocommand
, sizeof(IOCTL_Command_struct
))) {
1402 cmd_free(host
, c
, 0);
1406 if (iocommand
.Request
.Type
.Direction
== XFER_READ
) {
1407 /* Copy the data out of the buffer we created */
1409 (iocommand
.buf
, buff
, iocommand
.buf_size
)) {
1411 cmd_free(host
, c
, 0);
1416 cmd_free(host
, c
, 0);
1419 case CCISS_BIG_PASSTHRU
:{
1420 BIG_IOCTL_Command_struct
*ioc
;
1421 CommandList_struct
*c
;
1422 unsigned char **buff
= NULL
;
1423 int *buff_size
= NULL
;
1425 unsigned long flags
;
1429 DECLARE_COMPLETION_ONSTACK(wait
);
1432 BYTE __user
*data_ptr
;
1436 if (!capable(CAP_SYS_RAWIO
))
1438 ioc
= (BIG_IOCTL_Command_struct
*)
1439 kmalloc(sizeof(*ioc
), GFP_KERNEL
);
1444 if (copy_from_user(ioc
, argp
, sizeof(*ioc
))) {
1448 if ((ioc
->buf_size
< 1) &&
1449 (ioc
->Request
.Type
.Direction
!= XFER_NONE
)) {
1453 /* Check kmalloc limits using all SGs */
1454 if (ioc
->malloc_size
> MAX_KMALLOC_SIZE
) {
1458 if (ioc
->buf_size
> ioc
->malloc_size
* MAXSGENTRIES
) {
1463 kzalloc(MAXSGENTRIES
* sizeof(char *), GFP_KERNEL
);
1468 buff_size
= kmalloc(MAXSGENTRIES
* sizeof(int),
1474 left
= ioc
->buf_size
;
1475 data_ptr
= ioc
->buf
;
1478 ioc
->malloc_size
) ? ioc
->
1480 buff_size
[sg_used
] = sz
;
1481 buff
[sg_used
] = kmalloc(sz
, GFP_KERNEL
);
1482 if (buff
[sg_used
] == NULL
) {
1486 if (ioc
->Request
.Type
.Direction
== XFER_WRITE
) {
1488 (buff
[sg_used
], data_ptr
, sz
)) {
1493 memset(buff
[sg_used
], 0, sz
);
1499 if ((c
= cmd_alloc(host
, 0)) == NULL
) {
1503 c
->cmd_type
= CMD_IOCTL_PEND
;
1504 c
->Header
.ReplyQueue
= 0;
1506 if (ioc
->buf_size
> 0) {
1507 c
->Header
.SGList
= sg_used
;
1508 c
->Header
.SGTotal
= sg_used
;
1510 c
->Header
.SGList
= 0;
1511 c
->Header
.SGTotal
= 0;
1513 c
->Header
.LUN
= ioc
->LUN_info
;
1514 c
->Header
.Tag
.lower
= c
->busaddr
;
1516 c
->Request
= ioc
->Request
;
1517 if (ioc
->buf_size
> 0) {
1519 for (i
= 0; i
< sg_used
; i
++) {
1521 pci_map_single(host
->pdev
, buff
[i
],
1523 PCI_DMA_BIDIRECTIONAL
);
1524 c
->SG
[i
].Addr
.lower
=
1526 c
->SG
[i
].Addr
.upper
=
1528 c
->SG
[i
].Len
= buff_size
[i
];
1529 c
->SG
[i
].Ext
= 0; /* we are not chaining */
1533 /* Put the request on the tail of the request queue */
1534 spin_lock_irqsave(CCISS_LOCK(ctlr
), flags
);
1535 addQ(&host
->reqQ
, c
);
1538 spin_unlock_irqrestore(CCISS_LOCK(ctlr
), flags
);
1539 wait_for_completion(&wait
);
1540 /* unlock the buffers from DMA */
1541 for (i
= 0; i
< sg_used
; i
++) {
1542 temp64
.val32
.lower
= c
->SG
[i
].Addr
.lower
;
1543 temp64
.val32
.upper
= c
->SG
[i
].Addr
.upper
;
1544 pci_unmap_single(host
->pdev
,
1545 (dma_addr_t
) temp64
.val
, buff_size
[i
],
1546 PCI_DMA_BIDIRECTIONAL
);
1548 check_ioctl_unit_attention(host
, c
);
1549 /* Copy the error information out */
1550 ioc
->error_info
= *(c
->err_info
);
1551 if (copy_to_user(argp
, ioc
, sizeof(*ioc
))) {
1552 cmd_free(host
, c
, 0);
1556 if (ioc
->Request
.Type
.Direction
== XFER_READ
) {
1557 /* Copy the data out of the buffer we created */
1558 BYTE __user
*ptr
= ioc
->buf
;
1559 for (i
= 0; i
< sg_used
; i
++) {
1561 (ptr
, buff
[i
], buff_size
[i
])) {
1562 cmd_free(host
, c
, 0);
1566 ptr
+= buff_size
[i
];
1569 cmd_free(host
, c
, 0);
1573 for (i
= 0; i
< sg_used
; i
++)
1582 /* scsi_cmd_ioctl handles these, below, though some are not */
1583 /* very meaningful for cciss. SG_IO is the main one people want. */
1585 case SG_GET_VERSION_NUM
:
1586 case SG_SET_TIMEOUT
:
1587 case SG_GET_TIMEOUT
:
1588 case SG_GET_RESERVED_SIZE
:
1589 case SG_SET_RESERVED_SIZE
:
1590 case SG_EMULATED_HOST
:
1592 case SCSI_IOCTL_SEND_COMMAND
:
1593 return scsi_cmd_ioctl(disk
->queue
, disk
, mode
, cmd
, argp
);
1595 /* scsi_cmd_ioctl would normally handle these, below, but */
1596 /* they aren't a good fit for cciss, as CD-ROMs are */
1597 /* not supported, and we don't have any bus/target/lun */
1598 /* which we present to the kernel. */
1600 case CDROM_SEND_PACKET
:
1601 case CDROMCLOSETRAY
:
1603 case SCSI_IOCTL_GET_IDLUN
:
1604 case SCSI_IOCTL_GET_BUS_NUMBER
:
1610 static void cciss_check_queues(ctlr_info_t
*h
)
1612 int start_queue
= h
->next_to_run
;
1615 /* check to see if we have maxed out the number of commands that can
1616 * be placed on the queue. If so then exit. We do this check here
1617 * in case the interrupt we serviced was from an ioctl and did not
1618 * free any new commands.
1620 if ((find_first_zero_bit(h
->cmd_pool_bits
, h
->nr_cmds
)) == h
->nr_cmds
)
1623 /* We have room on the queue for more commands. Now we need to queue
1624 * them up. We will also keep track of the next queue to run so
1625 * that every queue gets a chance to be started first.
1627 for (i
= 0; i
< h
->highest_lun
+ 1; i
++) {
1628 int curr_queue
= (start_queue
+ i
) % (h
->highest_lun
+ 1);
1629 /* make sure the disk has been added and the drive is real
1630 * because this can be called from the middle of init_one.
1632 if (!h
->drv
[curr_queue
])
1634 if (!(h
->drv
[curr_queue
]->queue
) ||
1635 !(h
->drv
[curr_queue
]->heads
))
1637 blk_start_queue(h
->gendisk
[curr_queue
]->queue
);
1639 /* check to see if we have maxed out the number of commands
1640 * that can be placed on the queue.
1642 if ((find_first_zero_bit(h
->cmd_pool_bits
, h
->nr_cmds
)) == h
->nr_cmds
) {
1643 if (curr_queue
== start_queue
) {
1645 (start_queue
+ 1) % (h
->highest_lun
+ 1);
1648 h
->next_to_run
= curr_queue
;
1655 static void cciss_softirq_done(struct request
*rq
)
1657 CommandList_struct
*cmd
= rq
->completion_data
;
1658 ctlr_info_t
*h
= hba
[cmd
->ctlr
];
1659 SGDescriptor_struct
*curr_sg
= cmd
->SG
;
1660 unsigned long flags
;
1665 if (cmd
->Request
.Type
.Direction
== XFER_READ
)
1666 ddir
= PCI_DMA_FROMDEVICE
;
1668 ddir
= PCI_DMA_TODEVICE
;
1670 /* command did not need to be retried */
1671 /* unmap the DMA mapping for all the scatter gather elements */
1672 for (i
= 0; i
< cmd
->Header
.SGList
; i
++) {
1673 if (curr_sg
[sg_index
].Ext
== CCISS_SG_CHAIN
) {
1674 temp64
.val32
.lower
= cmd
->SG
[i
].Addr
.lower
;
1675 temp64
.val32
.upper
= cmd
->SG
[i
].Addr
.upper
;
1676 pci_dma_sync_single_for_cpu(h
->pdev
, temp64
.val
,
1677 cmd
->SG
[i
].Len
, ddir
);
1678 pci_unmap_single(h
->pdev
, temp64
.val
,
1679 cmd
->SG
[i
].Len
, ddir
);
1680 /* Point to the next block */
1681 curr_sg
= h
->cmd_sg_list
[cmd
->cmdindex
]->sgchain
;
1684 temp64
.val32
.lower
= curr_sg
[sg_index
].Addr
.lower
;
1685 temp64
.val32
.upper
= curr_sg
[sg_index
].Addr
.upper
;
1686 pci_unmap_page(h
->pdev
, temp64
.val
, curr_sg
[sg_index
].Len
,
1692 printk("Done with %p\n", rq
);
1693 #endif /* CCISS_DEBUG */
1695 /* set the residual count for pc requests */
1696 if (blk_pc_request(rq
))
1697 rq
->resid_len
= cmd
->err_info
->ResidualCnt
;
1699 blk_end_request_all(rq
, (rq
->errors
== 0) ? 0 : -EIO
);
1701 spin_lock_irqsave(&h
->lock
, flags
);
1702 cmd_free(h
, cmd
, 1);
1703 cciss_check_queues(h
);
1704 spin_unlock_irqrestore(&h
->lock
, flags
);
1707 static inline void log_unit_to_scsi3addr(ctlr_info_t
*h
,
1708 unsigned char scsi3addr
[], uint32_t log_unit
)
1710 memcpy(scsi3addr
, h
->drv
[log_unit
]->LunID
,
1711 sizeof(h
->drv
[log_unit
]->LunID
));
1714 /* This function gets the SCSI vendor, model, and revision of a logical drive
1715 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1716 * they cannot be read.
1718 static void cciss_get_device_descr(int ctlr
, int logvol
,
1719 char *vendor
, char *model
, char *rev
)
1722 InquiryData_struct
*inq_buf
;
1723 unsigned char scsi3addr
[8];
1729 inq_buf
= kzalloc(sizeof(InquiryData_struct
), GFP_KERNEL
);
1733 log_unit_to_scsi3addr(hba
[ctlr
], scsi3addr
, logvol
);
1734 rc
= sendcmd_withirq(CISS_INQUIRY
, ctlr
, inq_buf
, sizeof(*inq_buf
), 0,
1735 scsi3addr
, TYPE_CMD
);
1737 memcpy(vendor
, &inq_buf
->data_byte
[8], VENDOR_LEN
);
1738 vendor
[VENDOR_LEN
] = '\0';
1739 memcpy(model
, &inq_buf
->data_byte
[16], MODEL_LEN
);
1740 model
[MODEL_LEN
] = '\0';
1741 memcpy(rev
, &inq_buf
->data_byte
[32], REV_LEN
);
1742 rev
[REV_LEN
] = '\0';
1749 /* This function gets the serial number of a logical drive via
1750 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1751 * number cannot be had, for whatever reason, 16 bytes of 0xff
1752 * are returned instead.
1754 static void cciss_get_serial_no(int ctlr
, int logvol
,
1755 unsigned char *serial_no
, int buflen
)
1757 #define PAGE_83_INQ_BYTES 64
1760 unsigned char scsi3addr
[8];
1764 memset(serial_no
, 0xff, buflen
);
1765 buf
= kzalloc(PAGE_83_INQ_BYTES
, GFP_KERNEL
);
1768 memset(serial_no
, 0, buflen
);
1769 log_unit_to_scsi3addr(hba
[ctlr
], scsi3addr
, logvol
);
1770 rc
= sendcmd_withirq(CISS_INQUIRY
, ctlr
, buf
,
1771 PAGE_83_INQ_BYTES
, 0x83, scsi3addr
, TYPE_CMD
);
1773 memcpy(serial_no
, &buf
[8], buflen
);
1779 * cciss_add_disk sets up the block device queue for a logical drive
1781 static int cciss_add_disk(ctlr_info_t
*h
, struct gendisk
*disk
,
1784 disk
->queue
= blk_init_queue(do_cciss_request
, &h
->lock
);
1786 goto init_queue_failure
;
1787 sprintf(disk
->disk_name
, "cciss/c%dd%d", h
->ctlr
, drv_index
);
1788 disk
->major
= h
->major
;
1789 disk
->first_minor
= drv_index
<< NWD_SHIFT
;
1790 disk
->fops
= &cciss_fops
;
1791 if (cciss_create_ld_sysfs_entry(h
, drv_index
))
1793 disk
->private_data
= h
->drv
[drv_index
];
1794 disk
->driverfs_dev
= &h
->drv
[drv_index
]->dev
;
1796 /* Set up queue information */
1797 blk_queue_bounce_limit(disk
->queue
, h
->pdev
->dma_mask
);
1799 /* This is a hardware imposed limit. */
1800 blk_queue_max_hw_segments(disk
->queue
, h
->maxsgentries
);
1802 /* This is a limit in the driver and could be eliminated. */
1803 blk_queue_max_phys_segments(disk
->queue
, h
->maxsgentries
);
1805 blk_queue_max_sectors(disk
->queue
, h
->cciss_max_sectors
);
1807 blk_queue_softirq_done(disk
->queue
, cciss_softirq_done
);
1809 disk
->queue
->queuedata
= h
;
1811 blk_queue_logical_block_size(disk
->queue
,
1812 h
->drv
[drv_index
]->block_size
);
1814 /* Make sure all queue data is written out before */
1815 /* setting h->drv[drv_index]->queue, as setting this */
1816 /* allows the interrupt handler to start the queue */
1818 h
->drv
[drv_index
]->queue
= disk
->queue
;
1823 blk_cleanup_queue(disk
->queue
);
1829 /* This function will check the usage_count of the drive to be updated/added.
1830 * If the usage_count is zero and it is a heretofore unknown drive, or,
1831 * the drive's capacity, geometry, or serial number has changed,
1832 * then the drive information will be updated and the disk will be
1833 * re-registered with the kernel. If these conditions don't hold,
1834 * then it will be left alone for the next reboot. The exception to this
1835 * is disk 0 which will always be left registered with the kernel since it
1836 * is also the controller node. Any changes to disk 0 will show up on
1839 static void cciss_update_drive_info(int ctlr
, int drv_index
, int first_time
,
1842 ctlr_info_t
*h
= hba
[ctlr
];
1843 struct gendisk
*disk
;
1844 InquiryData_struct
*inq_buff
= NULL
;
1845 unsigned int block_size
;
1846 sector_t total_size
;
1847 unsigned long flags
= 0;
1849 drive_info_struct
*drvinfo
;
1851 /* Get information about the disk and modify the driver structure */
1852 inq_buff
= kmalloc(sizeof(InquiryData_struct
), GFP_KERNEL
);
1853 drvinfo
= kzalloc(sizeof(*drvinfo
), GFP_KERNEL
);
1854 if (inq_buff
== NULL
|| drvinfo
== NULL
)
1857 /* testing to see if 16-byte CDBs are already being used */
1858 if (h
->cciss_read
== CCISS_READ_16
) {
1859 cciss_read_capacity_16(h
->ctlr
, drv_index
,
1860 &total_size
, &block_size
);
1863 cciss_read_capacity(ctlr
, drv_index
, &total_size
, &block_size
);
1864 /* if read_capacity returns all F's this volume is >2TB */
1865 /* in size so we switch to 16-byte CDB's for all */
1866 /* read/write ops */
1867 if (total_size
== 0xFFFFFFFFULL
) {
1868 cciss_read_capacity_16(ctlr
, drv_index
,
1869 &total_size
, &block_size
);
1870 h
->cciss_read
= CCISS_READ_16
;
1871 h
->cciss_write
= CCISS_WRITE_16
;
1873 h
->cciss_read
= CCISS_READ_10
;
1874 h
->cciss_write
= CCISS_WRITE_10
;
1878 cciss_geometry_inquiry(ctlr
, drv_index
, total_size
, block_size
,
1880 drvinfo
->block_size
= block_size
;
1881 drvinfo
->nr_blocks
= total_size
+ 1;
1883 cciss_get_device_descr(ctlr
, drv_index
, drvinfo
->vendor
,
1884 drvinfo
->model
, drvinfo
->rev
);
1885 cciss_get_serial_no(ctlr
, drv_index
, drvinfo
->serial_no
,
1886 sizeof(drvinfo
->serial_no
));
1887 /* Save the lunid in case we deregister the disk, below. */
1888 memcpy(drvinfo
->LunID
, h
->drv
[drv_index
]->LunID
,
1889 sizeof(drvinfo
->LunID
));
1891 /* Is it the same disk we already know, and nothing's changed? */
1892 if (h
->drv
[drv_index
]->raid_level
!= -1 &&
1893 ((memcmp(drvinfo
->serial_no
,
1894 h
->drv
[drv_index
]->serial_no
, 16) == 0) &&
1895 drvinfo
->block_size
== h
->drv
[drv_index
]->block_size
&&
1896 drvinfo
->nr_blocks
== h
->drv
[drv_index
]->nr_blocks
&&
1897 drvinfo
->heads
== h
->drv
[drv_index
]->heads
&&
1898 drvinfo
->sectors
== h
->drv
[drv_index
]->sectors
&&
1899 drvinfo
->cylinders
== h
->drv
[drv_index
]->cylinders
))
1900 /* The disk is unchanged, nothing to update */
1903 /* If we get here it's not the same disk, or something's changed,
1904 * so we need to * deregister it, and re-register it, if it's not
1906 * If the disk already exists then deregister it before proceeding
1907 * (unless it's the first disk (for the controller node).
1909 if (h
->drv
[drv_index
]->raid_level
!= -1 && drv_index
!= 0) {
1910 printk(KERN_WARNING
"disk %d has changed.\n", drv_index
);
1911 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
1912 h
->drv
[drv_index
]->busy_configuring
= 1;
1913 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
1915 /* deregister_disk sets h->drv[drv_index]->queue = NULL
1916 * which keeps the interrupt handler from starting
1919 ret
= deregister_disk(h
, drv_index
, 0, via_ioctl
);
1922 /* If the disk is in use return */
1926 /* Save the new information from cciss_geometry_inquiry
1927 * and serial number inquiry. If the disk was deregistered
1928 * above, then h->drv[drv_index] will be NULL.
1930 if (h
->drv
[drv_index
] == NULL
) {
1931 drvinfo
->device_initialized
= 0;
1932 h
->drv
[drv_index
] = drvinfo
;
1933 drvinfo
= NULL
; /* so it won't be freed below. */
1935 /* special case for cxd0 */
1936 h
->drv
[drv_index
]->block_size
= drvinfo
->block_size
;
1937 h
->drv
[drv_index
]->nr_blocks
= drvinfo
->nr_blocks
;
1938 h
->drv
[drv_index
]->heads
= drvinfo
->heads
;
1939 h
->drv
[drv_index
]->sectors
= drvinfo
->sectors
;
1940 h
->drv
[drv_index
]->cylinders
= drvinfo
->cylinders
;
1941 h
->drv
[drv_index
]->raid_level
= drvinfo
->raid_level
;
1942 memcpy(h
->drv
[drv_index
]->serial_no
, drvinfo
->serial_no
, 16);
1943 memcpy(h
->drv
[drv_index
]->vendor
, drvinfo
->vendor
,
1945 memcpy(h
->drv
[drv_index
]->model
, drvinfo
->model
, MODEL_LEN
+ 1);
1946 memcpy(h
->drv
[drv_index
]->rev
, drvinfo
->rev
, REV_LEN
+ 1);
1950 disk
= h
->gendisk
[drv_index
];
1951 set_capacity(disk
, h
->drv
[drv_index
]->nr_blocks
);
1953 /* If it's not disk 0 (drv_index != 0)
1954 * or if it was disk 0, but there was previously
1955 * no actual corresponding configured logical drive
1956 * (raid_leve == -1) then we want to update the
1957 * logical drive's information.
1959 if (drv_index
|| first_time
) {
1960 if (cciss_add_disk(h
, disk
, drv_index
) != 0) {
1961 cciss_free_gendisk(h
, drv_index
);
1962 cciss_free_drive_info(h
, drv_index
);
1963 printk(KERN_WARNING
"cciss:%d could not update "
1964 "disk %d\n", h
->ctlr
, drv_index
);
1974 printk(KERN_ERR
"cciss: out of memory\n");
1978 /* This function will find the first index of the controllers drive array
1979 * that has a null drv pointer and allocate the drive info struct and
1980 * will return that index This is where new drives will be added.
1981 * If the index to be returned is greater than the highest_lun index for
1982 * the controller then highest_lun is set * to this new index.
1983 * If there are no available indexes or if tha allocation fails, then -1
1984 * is returned. * "controller_node" is used to know if this is a real
1985 * logical drive, or just the controller node, which determines if this
1986 * counts towards highest_lun.
1988 static int cciss_alloc_drive_info(ctlr_info_t
*h
, int controller_node
)
1991 drive_info_struct
*drv
;
1993 /* Search for an empty slot for our drive info */
1994 for (i
= 0; i
< CISS_MAX_LUN
; i
++) {
1996 /* if not cxd0 case, and it's occupied, skip it. */
1997 if (h
->drv
[i
] && i
!= 0)
2000 * If it's cxd0 case, and drv is alloc'ed already, and a
2001 * disk is configured there, skip it.
2003 if (i
== 0 && h
->drv
[i
] && h
->drv
[i
]->raid_level
!= -1)
2007 * We've found an empty slot. Update highest_lun
2008 * provided this isn't just the fake cxd0 controller node.
2010 if (i
> h
->highest_lun
&& !controller_node
)
2013 /* If adding a real disk at cxd0, and it's already alloc'ed */
2014 if (i
== 0 && h
->drv
[i
] != NULL
)
2018 * Found an empty slot, not already alloc'ed. Allocate it.
2019 * Mark it with raid_level == -1, so we know it's new later on.
2021 drv
= kzalloc(sizeof(*drv
), GFP_KERNEL
);
2024 drv
->raid_level
= -1; /* so we know it's new */
2031 static void cciss_free_drive_info(ctlr_info_t
*h
, int drv_index
)
2033 kfree(h
->drv
[drv_index
]);
2034 h
->drv
[drv_index
] = NULL
;
2037 static void cciss_free_gendisk(ctlr_info_t
*h
, int drv_index
)
2039 put_disk(h
->gendisk
[drv_index
]);
2040 h
->gendisk
[drv_index
] = NULL
;
2043 /* cciss_add_gendisk finds a free hba[]->drv structure
2044 * and allocates a gendisk if needed, and sets the lunid
2045 * in the drvinfo structure. It returns the index into
2046 * the ->drv[] array, or -1 if none are free.
2047 * is_controller_node indicates whether highest_lun should
2048 * count this disk, or if it's only being added to provide
2049 * a means to talk to the controller in case no logical
2050 * drives have yet been configured.
2052 static int cciss_add_gendisk(ctlr_info_t
*h
, unsigned char lunid
[],
2053 int controller_node
)
2057 drv_index
= cciss_alloc_drive_info(h
, controller_node
);
2058 if (drv_index
== -1)
2061 /*Check if the gendisk needs to be allocated */
2062 if (!h
->gendisk
[drv_index
]) {
2063 h
->gendisk
[drv_index
] =
2064 alloc_disk(1 << NWD_SHIFT
);
2065 if (!h
->gendisk
[drv_index
]) {
2066 printk(KERN_ERR
"cciss%d: could not "
2067 "allocate a new disk %d\n",
2068 h
->ctlr
, drv_index
);
2069 goto err_free_drive_info
;
2072 memcpy(h
->drv
[drv_index
]->LunID
, lunid
,
2073 sizeof(h
->drv
[drv_index
]->LunID
));
2074 if (cciss_create_ld_sysfs_entry(h
, drv_index
))
2076 /* Don't need to mark this busy because nobody */
2077 /* else knows about this disk yet to contend */
2078 /* for access to it. */
2079 h
->drv
[drv_index
]->busy_configuring
= 0;
2084 cciss_free_gendisk(h
, drv_index
);
2085 err_free_drive_info
:
2086 cciss_free_drive_info(h
, drv_index
);
2090 /* This is for the special case of a controller which
2091 * has no logical drives. In this case, we still need
2092 * to register a disk so the controller can be accessed
2093 * by the Array Config Utility.
2095 static void cciss_add_controller_node(ctlr_info_t
*h
)
2097 struct gendisk
*disk
;
2100 if (h
->gendisk
[0] != NULL
) /* already did this? Then bail. */
2103 drv_index
= cciss_add_gendisk(h
, CTLR_LUNID
, 1);
2104 if (drv_index
== -1)
2106 h
->drv
[drv_index
]->block_size
= 512;
2107 h
->drv
[drv_index
]->nr_blocks
= 0;
2108 h
->drv
[drv_index
]->heads
= 0;
2109 h
->drv
[drv_index
]->sectors
= 0;
2110 h
->drv
[drv_index
]->cylinders
= 0;
2111 h
->drv
[drv_index
]->raid_level
= -1;
2112 memset(h
->drv
[drv_index
]->serial_no
, 0, 16);
2113 disk
= h
->gendisk
[drv_index
];
2114 if (cciss_add_disk(h
, disk
, drv_index
) == 0)
2116 cciss_free_gendisk(h
, drv_index
);
2117 cciss_free_drive_info(h
, drv_index
);
2119 printk(KERN_WARNING
"cciss%d: could not "
2120 "add disk 0.\n", h
->ctlr
);
2124 /* This function will add and remove logical drives from the Logical
2125 * drive array of the controller and maintain persistency of ordering
2126 * so that mount points are preserved until the next reboot. This allows
2127 * for the removal of logical drives in the middle of the drive array
2128 * without a re-ordering of those drives.
2130 * h = The controller to perform the operations on
2132 static int rebuild_lun_table(ctlr_info_t
*h
, int first_time
,
2137 ReportLunData_struct
*ld_buff
= NULL
;
2143 unsigned char lunid
[8] = CTLR_LUNID
;
2144 unsigned long flags
;
2146 if (!capable(CAP_SYS_RAWIO
))
2149 /* Set busy_configuring flag for this operation */
2150 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
2151 if (h
->busy_configuring
) {
2152 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
2155 h
->busy_configuring
= 1;
2156 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
2158 ld_buff
= kzalloc(sizeof(ReportLunData_struct
), GFP_KERNEL
);
2159 if (ld_buff
== NULL
)
2162 return_code
= sendcmd_withirq(CISS_REPORT_LOG
, ctlr
, ld_buff
,
2163 sizeof(ReportLunData_struct
),
2164 0, CTLR_LUNID
, TYPE_CMD
);
2166 if (return_code
== IO_OK
)
2167 listlength
= be32_to_cpu(*(__be32
*) ld_buff
->LUNListLength
);
2168 else { /* reading number of logical volumes failed */
2169 printk(KERN_WARNING
"cciss: report logical volume"
2170 " command failed\n");
2175 num_luns
= listlength
/ 8; /* 8 bytes per entry */
2176 if (num_luns
> CISS_MAX_LUN
) {
2177 num_luns
= CISS_MAX_LUN
;
2178 printk(KERN_WARNING
"cciss: more luns configured"
2179 " on controller than can be handled by"
2184 cciss_add_controller_node(h
);
2186 /* Compare controller drive array to driver's drive array
2187 * to see if any drives are missing on the controller due
2188 * to action of Array Config Utility (user deletes drive)
2189 * and deregister logical drives which have disappeared.
2191 for (i
= 0; i
<= h
->highest_lun
; i
++) {
2195 /* skip holes in the array from already deleted drives */
2196 if (h
->drv
[i
] == NULL
)
2199 for (j
= 0; j
< num_luns
; j
++) {
2200 memcpy(lunid
, &ld_buff
->LUN
[j
][0], sizeof(lunid
));
2201 if (memcmp(h
->drv
[i
]->LunID
, lunid
,
2202 sizeof(lunid
)) == 0) {
2208 /* Deregister it from the OS, it's gone. */
2209 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
2210 h
->drv
[i
]->busy_configuring
= 1;
2211 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
2212 return_code
= deregister_disk(h
, i
, 1, via_ioctl
);
2213 if (h
->drv
[i
] != NULL
)
2214 h
->drv
[i
]->busy_configuring
= 0;
2218 /* Compare controller drive array to driver's drive array.
2219 * Check for updates in the drive information and any new drives
2220 * on the controller due to ACU adding logical drives, or changing
2221 * a logical drive's size, etc. Reregister any new/changed drives
2223 for (i
= 0; i
< num_luns
; i
++) {
2228 memcpy(lunid
, &ld_buff
->LUN
[i
][0], sizeof(lunid
));
2229 /* Find if the LUN is already in the drive array
2230 * of the driver. If so then update its info
2231 * if not in use. If it does not exist then find
2232 * the first free index and add it.
2234 for (j
= 0; j
<= h
->highest_lun
; j
++) {
2235 if (h
->drv
[j
] != NULL
&&
2236 memcmp(h
->drv
[j
]->LunID
, lunid
,
2237 sizeof(h
->drv
[j
]->LunID
)) == 0) {
2244 /* check if the drive was found already in the array */
2246 drv_index
= cciss_add_gendisk(h
, lunid
, 0);
2247 if (drv_index
== -1)
2250 cciss_update_drive_info(ctlr
, drv_index
, first_time
,
2256 h
->busy_configuring
= 0;
2257 /* We return -1 here to tell the ACU that we have registered/updated
2258 * all of the drives that we can and to keep it from calling us
2263 printk(KERN_ERR
"cciss: out of memory\n");
2264 h
->busy_configuring
= 0;
2268 static void cciss_clear_drive_info(drive_info_struct
*drive_info
)
2270 /* zero out the disk size info */
2271 drive_info
->nr_blocks
= 0;
2272 drive_info
->block_size
= 0;
2273 drive_info
->heads
= 0;
2274 drive_info
->sectors
= 0;
2275 drive_info
->cylinders
= 0;
2276 drive_info
->raid_level
= -1;
2277 memset(drive_info
->serial_no
, 0, sizeof(drive_info
->serial_no
));
2278 memset(drive_info
->model
, 0, sizeof(drive_info
->model
));
2279 memset(drive_info
->rev
, 0, sizeof(drive_info
->rev
));
2280 memset(drive_info
->vendor
, 0, sizeof(drive_info
->vendor
));
2282 * don't clear the LUNID though, we need to remember which
2287 /* This function will deregister the disk and it's queue from the
2288 * kernel. It must be called with the controller lock held and the
2289 * drv structures busy_configuring flag set. It's parameters are:
2291 * disk = This is the disk to be deregistered
2292 * drv = This is the drive_info_struct associated with the disk to be
2293 * deregistered. It contains information about the disk used
2295 * clear_all = This flag determines whether or not the disk information
2296 * is going to be completely cleared out and the highest_lun
2297 * reset. Sometimes we want to clear out information about
2298 * the disk in preparation for re-adding it. In this case
2299 * the highest_lun should be left unchanged and the LunID
2300 * should not be cleared.
2302 * This indicates whether we've reached this path via ioctl.
2303 * This affects the maximum usage count allowed for c0d0 to be messed with.
2304 * If this path is reached via ioctl(), then the max_usage_count will
2305 * be 1, as the process calling ioctl() has got to have the device open.
2306 * If we get here via sysfs, then the max usage count will be zero.
2308 static int deregister_disk(ctlr_info_t
*h
, int drv_index
,
2309 int clear_all
, int via_ioctl
)
2312 struct gendisk
*disk
;
2313 drive_info_struct
*drv
;
2314 int recalculate_highest_lun
;
2316 if (!capable(CAP_SYS_RAWIO
))
2319 drv
= h
->drv
[drv_index
];
2320 disk
= h
->gendisk
[drv_index
];
2322 /* make sure logical volume is NOT is use */
2323 if (clear_all
|| (h
->gendisk
[0] == disk
)) {
2324 if (drv
->usage_count
> via_ioctl
)
2326 } else if (drv
->usage_count
> 0)
2329 recalculate_highest_lun
= (drv
== h
->drv
[h
->highest_lun
]);
2331 /* invalidate the devices and deregister the disk. If it is disk
2332 * zero do not deregister it but just zero out it's values. This
2333 * allows us to delete disk zero but keep the controller registered.
2335 if (h
->gendisk
[0] != disk
) {
2336 struct request_queue
*q
= disk
->queue
;
2337 if (disk
->flags
& GENHD_FL_UP
) {
2338 cciss_destroy_ld_sysfs_entry(h
, drv_index
, 0);
2342 blk_cleanup_queue(q
);
2343 /* If clear_all is set then we are deleting the logical
2344 * drive, not just refreshing its info. For drives
2345 * other than disk 0 we will call put_disk. We do not
2346 * do this for disk 0 as we need it to be able to
2347 * configure the controller.
2350 /* This isn't pretty, but we need to find the
2351 * disk in our array and NULL our the pointer.
2352 * This is so that we will call alloc_disk if
2353 * this index is used again later.
2355 for (i
=0; i
< CISS_MAX_LUN
; i
++){
2356 if (h
->gendisk
[i
] == disk
) {
2357 h
->gendisk
[i
] = NULL
;
2364 set_capacity(disk
, 0);
2365 cciss_clear_drive_info(drv
);
2370 /* if it was the last disk, find the new hightest lun */
2371 if (clear_all
&& recalculate_highest_lun
) {
2372 int i
, newhighest
= -1;
2373 for (i
= 0; i
<= h
->highest_lun
; i
++) {
2374 /* if the disk has size > 0, it is available */
2375 if (h
->drv
[i
] && h
->drv
[i
]->heads
)
2378 h
->highest_lun
= newhighest
;
2383 static int fill_cmd(CommandList_struct
*c
, __u8 cmd
, int ctlr
, void *buff
,
2384 size_t size
, __u8 page_code
, unsigned char *scsi3addr
,
2387 ctlr_info_t
*h
= hba
[ctlr
];
2388 u64bit buff_dma_handle
;
2391 c
->cmd_type
= CMD_IOCTL_PEND
;
2392 c
->Header
.ReplyQueue
= 0;
2394 c
->Header
.SGList
= 1;
2395 c
->Header
.SGTotal
= 1;
2397 c
->Header
.SGList
= 0;
2398 c
->Header
.SGTotal
= 0;
2400 c
->Header
.Tag
.lower
= c
->busaddr
;
2401 memcpy(c
->Header
.LUN
.LunAddrBytes
, scsi3addr
, 8);
2403 c
->Request
.Type
.Type
= cmd_type
;
2404 if (cmd_type
== TYPE_CMD
) {
2407 /* are we trying to read a vital product page */
2408 if (page_code
!= 0) {
2409 c
->Request
.CDB
[1] = 0x01;
2410 c
->Request
.CDB
[2] = page_code
;
2412 c
->Request
.CDBLen
= 6;
2413 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2414 c
->Request
.Type
.Direction
= XFER_READ
;
2415 c
->Request
.Timeout
= 0;
2416 c
->Request
.CDB
[0] = CISS_INQUIRY
;
2417 c
->Request
.CDB
[4] = size
& 0xFF;
2419 case CISS_REPORT_LOG
:
2420 case CISS_REPORT_PHYS
:
2421 /* Talking to controller so It's a physical command
2422 mode = 00 target = 0. Nothing to write.
2424 c
->Request
.CDBLen
= 12;
2425 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2426 c
->Request
.Type
.Direction
= XFER_READ
;
2427 c
->Request
.Timeout
= 0;
2428 c
->Request
.CDB
[0] = cmd
;
2429 c
->Request
.CDB
[6] = (size
>> 24) & 0xFF; /* MSB */
2430 c
->Request
.CDB
[7] = (size
>> 16) & 0xFF;
2431 c
->Request
.CDB
[8] = (size
>> 8) & 0xFF;
2432 c
->Request
.CDB
[9] = size
& 0xFF;
2435 case CCISS_READ_CAPACITY
:
2436 c
->Request
.CDBLen
= 10;
2437 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2438 c
->Request
.Type
.Direction
= XFER_READ
;
2439 c
->Request
.Timeout
= 0;
2440 c
->Request
.CDB
[0] = cmd
;
2442 case CCISS_READ_CAPACITY_16
:
2443 c
->Request
.CDBLen
= 16;
2444 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2445 c
->Request
.Type
.Direction
= XFER_READ
;
2446 c
->Request
.Timeout
= 0;
2447 c
->Request
.CDB
[0] = cmd
;
2448 c
->Request
.CDB
[1] = 0x10;
2449 c
->Request
.CDB
[10] = (size
>> 24) & 0xFF;
2450 c
->Request
.CDB
[11] = (size
>> 16) & 0xFF;
2451 c
->Request
.CDB
[12] = (size
>> 8) & 0xFF;
2452 c
->Request
.CDB
[13] = size
& 0xFF;
2453 c
->Request
.Timeout
= 0;
2454 c
->Request
.CDB
[0] = cmd
;
2456 case CCISS_CACHE_FLUSH
:
2457 c
->Request
.CDBLen
= 12;
2458 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2459 c
->Request
.Type
.Direction
= XFER_WRITE
;
2460 c
->Request
.Timeout
= 0;
2461 c
->Request
.CDB
[0] = BMIC_WRITE
;
2462 c
->Request
.CDB
[6] = BMIC_CACHE_FLUSH
;
2464 case TEST_UNIT_READY
:
2465 c
->Request
.CDBLen
= 6;
2466 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2467 c
->Request
.Type
.Direction
= XFER_NONE
;
2468 c
->Request
.Timeout
= 0;
2472 "cciss%d: Unknown Command 0x%c\n", ctlr
, cmd
);
2475 } else if (cmd_type
== TYPE_MSG
) {
2477 case 0: /* ABORT message */
2478 c
->Request
.CDBLen
= 12;
2479 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2480 c
->Request
.Type
.Direction
= XFER_WRITE
;
2481 c
->Request
.Timeout
= 0;
2482 c
->Request
.CDB
[0] = cmd
; /* abort */
2483 c
->Request
.CDB
[1] = 0; /* abort a command */
2484 /* buff contains the tag of the command to abort */
2485 memcpy(&c
->Request
.CDB
[4], buff
, 8);
2487 case 1: /* RESET message */
2488 c
->Request
.CDBLen
= 16;
2489 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2490 c
->Request
.Type
.Direction
= XFER_NONE
;
2491 c
->Request
.Timeout
= 0;
2492 memset(&c
->Request
.CDB
[0], 0, sizeof(c
->Request
.CDB
));
2493 c
->Request
.CDB
[0] = cmd
; /* reset */
2494 c
->Request
.CDB
[1] = 0x03; /* reset a target */
2496 case 3: /* No-Op message */
2497 c
->Request
.CDBLen
= 1;
2498 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
2499 c
->Request
.Type
.Direction
= XFER_WRITE
;
2500 c
->Request
.Timeout
= 0;
2501 c
->Request
.CDB
[0] = cmd
;
2505 "cciss%d: unknown message type %d\n", ctlr
, cmd
);
2510 "cciss%d: unknown command type %d\n", ctlr
, cmd_type
);
2513 /* Fill in the scatter gather information */
2515 buff_dma_handle
.val
= (__u64
) pci_map_single(h
->pdev
,
2517 PCI_DMA_BIDIRECTIONAL
);
2518 c
->SG
[0].Addr
.lower
= buff_dma_handle
.val32
.lower
;
2519 c
->SG
[0].Addr
.upper
= buff_dma_handle
.val32
.upper
;
2520 c
->SG
[0].Len
= size
;
2521 c
->SG
[0].Ext
= 0; /* we are not chaining */
2526 static int check_target_status(ctlr_info_t
*h
, CommandList_struct
*c
)
2528 switch (c
->err_info
->ScsiStatus
) {
2531 case SAM_STAT_CHECK_CONDITION
:
2532 switch (0xf & c
->err_info
->SenseInfo
[2]) {
2533 case 0: return IO_OK
; /* no sense */
2534 case 1: return IO_OK
; /* recovered error */
2536 if (check_for_unit_attention(h
, c
))
2537 return IO_NEEDS_RETRY
;
2538 printk(KERN_WARNING
"cciss%d: cmd 0x%02x "
2539 "check condition, sense key = 0x%02x\n",
2540 h
->ctlr
, c
->Request
.CDB
[0],
2541 c
->err_info
->SenseInfo
[2]);
2545 printk(KERN_WARNING
"cciss%d: cmd 0x%02x"
2546 "scsi status = 0x%02x\n", h
->ctlr
,
2547 c
->Request
.CDB
[0], c
->err_info
->ScsiStatus
);
2553 static int process_sendcmd_error(ctlr_info_t
*h
, CommandList_struct
*c
)
2555 int return_status
= IO_OK
;
2557 if (c
->err_info
->CommandStatus
== CMD_SUCCESS
)
2560 switch (c
->err_info
->CommandStatus
) {
2561 case CMD_TARGET_STATUS
:
2562 return_status
= check_target_status(h
, c
);
2564 case CMD_DATA_UNDERRUN
:
2565 case CMD_DATA_OVERRUN
:
2566 /* expected for inquiry and report lun commands */
2569 printk(KERN_WARNING
"cciss: cmd 0x%02x is "
2570 "reported invalid\n", c
->Request
.CDB
[0]);
2571 return_status
= IO_ERROR
;
2573 case CMD_PROTOCOL_ERR
:
2574 printk(KERN_WARNING
"cciss: cmd 0x%02x has "
2575 "protocol error \n", c
->Request
.CDB
[0]);
2576 return_status
= IO_ERROR
;
2578 case CMD_HARDWARE_ERR
:
2579 printk(KERN_WARNING
"cciss: cmd 0x%02x had "
2580 " hardware error\n", c
->Request
.CDB
[0]);
2581 return_status
= IO_ERROR
;
2583 case CMD_CONNECTION_LOST
:
2584 printk(KERN_WARNING
"cciss: cmd 0x%02x had "
2585 "connection lost\n", c
->Request
.CDB
[0]);
2586 return_status
= IO_ERROR
;
2589 printk(KERN_WARNING
"cciss: cmd 0x%02x was "
2590 "aborted\n", c
->Request
.CDB
[0]);
2591 return_status
= IO_ERROR
;
2593 case CMD_ABORT_FAILED
:
2594 printk(KERN_WARNING
"cciss: cmd 0x%02x reports "
2595 "abort failed\n", c
->Request
.CDB
[0]);
2596 return_status
= IO_ERROR
;
2598 case CMD_UNSOLICITED_ABORT
:
2600 "cciss%d: unsolicited abort 0x%02x\n", h
->ctlr
,
2602 return_status
= IO_NEEDS_RETRY
;
2605 printk(KERN_WARNING
"cciss: cmd 0x%02x returned "
2606 "unknown status %x\n", c
->Request
.CDB
[0],
2607 c
->err_info
->CommandStatus
);
2608 return_status
= IO_ERROR
;
2610 return return_status
;
2613 static int sendcmd_withirq_core(ctlr_info_t
*h
, CommandList_struct
*c
,
2616 DECLARE_COMPLETION_ONSTACK(wait
);
2617 u64bit buff_dma_handle
;
2618 unsigned long flags
;
2619 int return_status
= IO_OK
;
2623 /* Put the request on the tail of the queue and send it */
2624 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
2628 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
2630 wait_for_completion(&wait
);
2632 if (c
->err_info
->CommandStatus
== 0 || !attempt_retry
)
2635 return_status
= process_sendcmd_error(h
, c
);
2637 if (return_status
== IO_NEEDS_RETRY
&&
2638 c
->retry_count
< MAX_CMD_RETRIES
) {
2639 printk(KERN_WARNING
"cciss%d: retrying 0x%02x\n", h
->ctlr
,
2642 /* erase the old error information */
2643 memset(c
->err_info
, 0, sizeof(ErrorInfo_struct
));
2644 return_status
= IO_OK
;
2645 INIT_COMPLETION(wait
);
2650 /* unlock the buffers from DMA */
2651 buff_dma_handle
.val32
.lower
= c
->SG
[0].Addr
.lower
;
2652 buff_dma_handle
.val32
.upper
= c
->SG
[0].Addr
.upper
;
2653 pci_unmap_single(h
->pdev
, (dma_addr_t
) buff_dma_handle
.val
,
2654 c
->SG
[0].Len
, PCI_DMA_BIDIRECTIONAL
);
2655 return return_status
;
2658 static int sendcmd_withirq(__u8 cmd
, int ctlr
, void *buff
, size_t size
,
2659 __u8 page_code
, unsigned char scsi3addr
[],
2662 ctlr_info_t
*h
= hba
[ctlr
];
2663 CommandList_struct
*c
;
2666 c
= cmd_alloc(h
, 0);
2669 return_status
= fill_cmd(c
, cmd
, ctlr
, buff
, size
, page_code
,
2670 scsi3addr
, cmd_type
);
2671 if (return_status
== IO_OK
)
2672 return_status
= sendcmd_withirq_core(h
, c
, 1);
2675 return return_status
;
2678 static void cciss_geometry_inquiry(int ctlr
, int logvol
,
2679 sector_t total_size
,
2680 unsigned int block_size
,
2681 InquiryData_struct
*inq_buff
,
2682 drive_info_struct
*drv
)
2686 unsigned char scsi3addr
[8];
2688 memset(inq_buff
, 0, sizeof(InquiryData_struct
));
2689 log_unit_to_scsi3addr(hba
[ctlr
], scsi3addr
, logvol
);
2690 return_code
= sendcmd_withirq(CISS_INQUIRY
, ctlr
, inq_buff
,
2691 sizeof(*inq_buff
), 0xC1, scsi3addr
, TYPE_CMD
);
2692 if (return_code
== IO_OK
) {
2693 if (inq_buff
->data_byte
[8] == 0xFF) {
2695 "cciss: reading geometry failed, volume "
2696 "does not support reading geometry\n");
2698 drv
->sectors
= 32; /* Sectors per track */
2699 drv
->cylinders
= total_size
+ 1;
2700 drv
->raid_level
= RAID_UNKNOWN
;
2702 drv
->heads
= inq_buff
->data_byte
[6];
2703 drv
->sectors
= inq_buff
->data_byte
[7];
2704 drv
->cylinders
= (inq_buff
->data_byte
[4] & 0xff) << 8;
2705 drv
->cylinders
+= inq_buff
->data_byte
[5];
2706 drv
->raid_level
= inq_buff
->data_byte
[8];
2708 drv
->block_size
= block_size
;
2709 drv
->nr_blocks
= total_size
+ 1;
2710 t
= drv
->heads
* drv
->sectors
;
2712 sector_t real_size
= total_size
+ 1;
2713 unsigned long rem
= sector_div(real_size
, t
);
2716 drv
->cylinders
= real_size
;
2718 } else { /* Get geometry failed */
2719 printk(KERN_WARNING
"cciss: reading geometry failed\n");
2724 cciss_read_capacity(int ctlr
, int logvol
, sector_t
*total_size
,
2725 unsigned int *block_size
)
2727 ReadCapdata_struct
*buf
;
2729 unsigned char scsi3addr
[8];
2731 buf
= kzalloc(sizeof(ReadCapdata_struct
), GFP_KERNEL
);
2733 printk(KERN_WARNING
"cciss: out of memory\n");
2737 log_unit_to_scsi3addr(hba
[ctlr
], scsi3addr
, logvol
);
2738 return_code
= sendcmd_withirq(CCISS_READ_CAPACITY
, ctlr
, buf
,
2739 sizeof(ReadCapdata_struct
), 0, scsi3addr
, TYPE_CMD
);
2740 if (return_code
== IO_OK
) {
2741 *total_size
= be32_to_cpu(*(__be32
*) buf
->total_size
);
2742 *block_size
= be32_to_cpu(*(__be32
*) buf
->block_size
);
2743 } else { /* read capacity command failed */
2744 printk(KERN_WARNING
"cciss: read capacity failed\n");
2746 *block_size
= BLOCK_SIZE
;
2751 static void cciss_read_capacity_16(int ctlr
, int logvol
,
2752 sector_t
*total_size
, unsigned int *block_size
)
2754 ReadCapdata_struct_16
*buf
;
2756 unsigned char scsi3addr
[8];
2758 buf
= kzalloc(sizeof(ReadCapdata_struct_16
), GFP_KERNEL
);
2760 printk(KERN_WARNING
"cciss: out of memory\n");
2764 log_unit_to_scsi3addr(hba
[ctlr
], scsi3addr
, logvol
);
2765 return_code
= sendcmd_withirq(CCISS_READ_CAPACITY_16
,
2766 ctlr
, buf
, sizeof(ReadCapdata_struct_16
),
2767 0, scsi3addr
, TYPE_CMD
);
2768 if (return_code
== IO_OK
) {
2769 *total_size
= be64_to_cpu(*(__be64
*) buf
->total_size
);
2770 *block_size
= be32_to_cpu(*(__be32
*) buf
->block_size
);
2771 } else { /* read capacity command failed */
2772 printk(KERN_WARNING
"cciss: read capacity failed\n");
2774 *block_size
= BLOCK_SIZE
;
2776 printk(KERN_INFO
" blocks= %llu block_size= %d\n",
2777 (unsigned long long)*total_size
+1, *block_size
);
2781 static int cciss_revalidate(struct gendisk
*disk
)
2783 ctlr_info_t
*h
= get_host(disk
);
2784 drive_info_struct
*drv
= get_drv(disk
);
2787 unsigned int block_size
;
2788 sector_t total_size
;
2789 InquiryData_struct
*inq_buff
= NULL
;
2791 for (logvol
= 0; logvol
< CISS_MAX_LUN
; logvol
++) {
2792 if (memcmp(h
->drv
[logvol
]->LunID
, drv
->LunID
,
2793 sizeof(drv
->LunID
)) == 0) {
2802 inq_buff
= kmalloc(sizeof(InquiryData_struct
), GFP_KERNEL
);
2803 if (inq_buff
== NULL
) {
2804 printk(KERN_WARNING
"cciss: out of memory\n");
2807 if (h
->cciss_read
== CCISS_READ_10
) {
2808 cciss_read_capacity(h
->ctlr
, logvol
,
2809 &total_size
, &block_size
);
2811 cciss_read_capacity_16(h
->ctlr
, logvol
,
2812 &total_size
, &block_size
);
2814 cciss_geometry_inquiry(h
->ctlr
, logvol
, total_size
, block_size
,
2817 blk_queue_logical_block_size(drv
->queue
, drv
->block_size
);
2818 set_capacity(disk
, drv
->nr_blocks
);
2825 * Map (physical) PCI mem into (virtual) kernel space
2827 static void __iomem
*remap_pci_mem(ulong base
, ulong size
)
2829 ulong page_base
= ((ulong
) base
) & PAGE_MASK
;
2830 ulong page_offs
= ((ulong
) base
) - page_base
;
2831 void __iomem
*page_remapped
= ioremap(page_base
, page_offs
+ size
);
2833 return page_remapped
? (page_remapped
+ page_offs
) : NULL
;
2837 * Takes jobs of the Q and sends them to the hardware, then puts it on
2838 * the Q to wait for completion.
2840 static void start_io(ctlr_info_t
*h
)
2842 CommandList_struct
*c
;
2844 while (!hlist_empty(&h
->reqQ
)) {
2845 c
= hlist_entry(h
->reqQ
.first
, CommandList_struct
, list
);
2846 /* can't do anything if fifo is full */
2847 if ((h
->access
.fifo_full(h
))) {
2848 printk(KERN_WARNING
"cciss: fifo full\n");
2852 /* Get the first entry from the Request Q */
2856 /* Tell the controller execute command */
2857 h
->access
.submit_command(h
, c
);
2859 /* Put job onto the completed Q */
2864 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2865 /* Zeros out the error record and then resends the command back */
2866 /* to the controller */
2867 static inline void resend_cciss_cmd(ctlr_info_t
*h
, CommandList_struct
*c
)
2869 /* erase the old error information */
2870 memset(c
->err_info
, 0, sizeof(ErrorInfo_struct
));
2872 /* add it to software queue and then send it to the controller */
2875 if (h
->Qdepth
> h
->maxQsinceinit
)
2876 h
->maxQsinceinit
= h
->Qdepth
;
2881 static inline unsigned int make_status_bytes(unsigned int scsi_status_byte
,
2882 unsigned int msg_byte
, unsigned int host_byte
,
2883 unsigned int driver_byte
)
2885 /* inverse of macros in scsi.h */
2886 return (scsi_status_byte
& 0xff) |
2887 ((msg_byte
& 0xff) << 8) |
2888 ((host_byte
& 0xff) << 16) |
2889 ((driver_byte
& 0xff) << 24);
2892 static inline int evaluate_target_status(ctlr_info_t
*h
,
2893 CommandList_struct
*cmd
, int *retry_cmd
)
2895 unsigned char sense_key
;
2896 unsigned char status_byte
, msg_byte
, host_byte
, driver_byte
;
2900 /* If we get in here, it means we got "target status", that is, scsi status */
2901 status_byte
= cmd
->err_info
->ScsiStatus
;
2902 driver_byte
= DRIVER_OK
;
2903 msg_byte
= cmd
->err_info
->CommandStatus
; /* correct? seems too device specific */
2905 if (blk_pc_request(cmd
->rq
))
2906 host_byte
= DID_PASSTHROUGH
;
2910 error_value
= make_status_bytes(status_byte
, msg_byte
,
2911 host_byte
, driver_byte
);
2913 if (cmd
->err_info
->ScsiStatus
!= SAM_STAT_CHECK_CONDITION
) {
2914 if (!blk_pc_request(cmd
->rq
))
2915 printk(KERN_WARNING
"cciss: cmd %p "
2916 "has SCSI Status 0x%x\n",
2917 cmd
, cmd
->err_info
->ScsiStatus
);
2921 /* check the sense key */
2922 sense_key
= 0xf & cmd
->err_info
->SenseInfo
[2];
2923 /* no status or recovered error */
2924 if (((sense_key
== 0x0) || (sense_key
== 0x1)) && !blk_pc_request(cmd
->rq
))
2927 if (check_for_unit_attention(h
, cmd
)) {
2928 *retry_cmd
= !blk_pc_request(cmd
->rq
);
2932 if (!blk_pc_request(cmd
->rq
)) { /* Not SG_IO or similar? */
2933 if (error_value
!= 0)
2934 printk(KERN_WARNING
"cciss: cmd %p has CHECK CONDITION"
2935 " sense key = 0x%x\n", cmd
, sense_key
);
2939 /* SG_IO or similar, copy sense data back */
2940 if (cmd
->rq
->sense
) {
2941 if (cmd
->rq
->sense_len
> cmd
->err_info
->SenseLen
)
2942 cmd
->rq
->sense_len
= cmd
->err_info
->SenseLen
;
2943 memcpy(cmd
->rq
->sense
, cmd
->err_info
->SenseInfo
,
2944 cmd
->rq
->sense_len
);
2946 cmd
->rq
->sense_len
= 0;
2951 /* checks the status of the job and calls complete buffers to mark all
2952 * buffers for the completed job. Note that this function does not need
2953 * to hold the hba/queue lock.
2955 static inline void complete_command(ctlr_info_t
*h
, CommandList_struct
*cmd
,
2959 struct request
*rq
= cmd
->rq
;
2964 rq
->errors
= make_status_bytes(0, 0, 0, DRIVER_TIMEOUT
);
2966 if (cmd
->err_info
->CommandStatus
== 0) /* no error has occurred */
2967 goto after_error_processing
;
2969 switch (cmd
->err_info
->CommandStatus
) {
2970 case CMD_TARGET_STATUS
:
2971 rq
->errors
= evaluate_target_status(h
, cmd
, &retry_cmd
);
2973 case CMD_DATA_UNDERRUN
:
2974 if (blk_fs_request(cmd
->rq
)) {
2975 printk(KERN_WARNING
"cciss: cmd %p has"
2976 " completed with data underrun "
2978 cmd
->rq
->resid_len
= cmd
->err_info
->ResidualCnt
;
2981 case CMD_DATA_OVERRUN
:
2982 if (blk_fs_request(cmd
->rq
))
2983 printk(KERN_WARNING
"cciss: cmd %p has"
2984 " completed with data overrun "
2988 printk(KERN_WARNING
"cciss: cmd %p is "
2989 "reported invalid\n", cmd
);
2990 rq
->errors
= make_status_bytes(SAM_STAT_GOOD
,
2991 cmd
->err_info
->CommandStatus
, DRIVER_OK
,
2992 blk_pc_request(cmd
->rq
) ? DID_PASSTHROUGH
: DID_ERROR
);
2994 case CMD_PROTOCOL_ERR
:
2995 printk(KERN_WARNING
"cciss: cmd %p has "
2996 "protocol error \n", cmd
);
2997 rq
->errors
= make_status_bytes(SAM_STAT_GOOD
,
2998 cmd
->err_info
->CommandStatus
, DRIVER_OK
,
2999 blk_pc_request(cmd
->rq
) ? DID_PASSTHROUGH
: DID_ERROR
);
3001 case CMD_HARDWARE_ERR
:
3002 printk(KERN_WARNING
"cciss: cmd %p had "
3003 " hardware error\n", cmd
);
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
);
3008 case CMD_CONNECTION_LOST
:
3009 printk(KERN_WARNING
"cciss: cmd %p had "
3010 "connection lost\n", cmd
);
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
);
3016 printk(KERN_WARNING
"cciss: cmd %p was "
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_ABORT
);
3022 case CMD_ABORT_FAILED
:
3023 printk(KERN_WARNING
"cciss: cmd %p reports "
3024 "abort failed\n", cmd
);
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
);
3029 case CMD_UNSOLICITED_ABORT
:
3030 printk(KERN_WARNING
"cciss%d: unsolicited "
3031 "abort %p\n", h
->ctlr
, cmd
);
3032 if (cmd
->retry_count
< MAX_CMD_RETRIES
) {
3035 "cciss%d: retrying %p\n", h
->ctlr
, cmd
);
3039 "cciss%d: %p retried too "
3040 "many times\n", h
->ctlr
, cmd
);
3041 rq
->errors
= make_status_bytes(SAM_STAT_GOOD
,
3042 cmd
->err_info
->CommandStatus
, DRIVER_OK
,
3043 blk_pc_request(cmd
->rq
) ? DID_PASSTHROUGH
: DID_ABORT
);
3046 printk(KERN_WARNING
"cciss: cmd %p timedout\n", cmd
);
3047 rq
->errors
= make_status_bytes(SAM_STAT_GOOD
,
3048 cmd
->err_info
->CommandStatus
, DRIVER_OK
,
3049 blk_pc_request(cmd
->rq
) ? DID_PASSTHROUGH
: DID_ERROR
);
3052 printk(KERN_WARNING
"cciss: cmd %p returned "
3053 "unknown status %x\n", cmd
,
3054 cmd
->err_info
->CommandStatus
);
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_ERROR
);
3060 after_error_processing
:
3062 /* We need to return this command */
3064 resend_cciss_cmd(h
, cmd
);
3067 cmd
->rq
->completion_data
= cmd
;
3068 blk_complete_request(cmd
->rq
);
3072 * Get a request and submit it to the controller.
3074 static void do_cciss_request(struct request_queue
*q
)
3076 ctlr_info_t
*h
= q
->queuedata
;
3077 CommandList_struct
*c
;
3080 struct request
*creq
;
3082 struct scatterlist
*tmp_sg
;
3083 SGDescriptor_struct
*curr_sg
;
3084 drive_info_struct
*drv
;
3090 /* We call start_io here in case there is a command waiting on the
3091 * queue that has not been sent.
3093 if (blk_queue_plugged(q
))
3097 creq
= blk_peek_request(q
);
3101 BUG_ON(creq
->nr_phys_segments
> h
->maxsgentries
);
3103 if ((c
= cmd_alloc(h
, 1)) == NULL
)
3106 blk_start_request(creq
);
3108 tmp_sg
= h
->scatter_list
[c
->cmdindex
];
3109 spin_unlock_irq(q
->queue_lock
);
3111 c
->cmd_type
= CMD_RWREQ
;
3114 /* fill in the request */
3115 drv
= creq
->rq_disk
->private_data
;
3116 c
->Header
.ReplyQueue
= 0; /* unused in simple mode */
3117 /* got command from pool, so use the command block index instead */
3118 /* for direct lookups. */
3119 /* The first 2 bits are reserved for controller error reporting. */
3120 c
->Header
.Tag
.lower
= (c
->cmdindex
<< 3);
3121 c
->Header
.Tag
.lower
|= 0x04; /* flag for direct lookup. */
3122 memcpy(&c
->Header
.LUN
, drv
->LunID
, sizeof(drv
->LunID
));
3123 c
->Request
.CDBLen
= 10; /* 12 byte commands not in FW yet; */
3124 c
->Request
.Type
.Type
= TYPE_CMD
; /* It is a command. */
3125 c
->Request
.Type
.Attribute
= ATTR_SIMPLE
;
3126 c
->Request
.Type
.Direction
=
3127 (rq_data_dir(creq
) == READ
) ? XFER_READ
: XFER_WRITE
;
3128 c
->Request
.Timeout
= 0; /* Don't time out */
3130 (rq_data_dir(creq
) == READ
) ? h
->cciss_read
: h
->cciss_write
;
3131 start_blk
= blk_rq_pos(creq
);
3133 printk(KERN_DEBUG
"ciss: sector =%d nr_sectors=%d\n",
3134 (int)blk_rq_pos(creq
), (int)blk_rq_sectors(creq
));
3135 #endif /* CCISS_DEBUG */
3137 sg_init_table(tmp_sg
, h
->maxsgentries
);
3138 seg
= blk_rq_map_sg(q
, creq
, tmp_sg
);
3140 /* get the DMA records for the setup */
3141 if (c
->Request
.Type
.Direction
== XFER_READ
)
3142 dir
= PCI_DMA_FROMDEVICE
;
3144 dir
= PCI_DMA_TODEVICE
;
3150 for (i
= 0; i
< seg
; i
++) {
3151 if (((sg_index
+1) == (h
->max_cmd_sgentries
)) &&
3152 !chained
&& ((seg
- i
) > 1)) {
3154 curr_sg
[sg_index
].Len
= (nseg
) *
3155 sizeof(SGDescriptor_struct
);
3156 curr_sg
[sg_index
].Ext
= CCISS_SG_CHAIN
;
3158 /* Point to next chain block. */
3159 curr_sg
= h
->cmd_sg_list
[c
->cmdindex
]->sgchain
;
3163 curr_sg
[sg_index
].Len
= tmp_sg
[i
].length
;
3164 temp64
.val
= (__u64
) pci_map_page(h
->pdev
, sg_page(&tmp_sg
[i
]),
3166 tmp_sg
[i
].length
, dir
);
3167 curr_sg
[sg_index
].Addr
.lower
= temp64
.val32
.lower
;
3168 curr_sg
[sg_index
].Addr
.upper
= temp64
.val32
.upper
;
3169 curr_sg
[sg_index
].Ext
= 0; /* we are not chaining */
3177 sg_index
= h
->max_cmd_sgentries
- 1;
3178 len
= curr_sg
[sg_index
].Len
;
3179 /* Setup pointer to next chain block.
3180 * Fill out last element in current chain
3181 * block with address of next chain block.
3183 temp64
.val
= pci_map_single(h
->pdev
,
3184 h
->cmd_sg_list
[c
->cmdindex
]->sgchain
,
3187 h
->cmd_sg_list
[c
->cmdindex
]->sg_chain_dma
= temp64
.val
;
3188 curr_sg
[sg_index
].Addr
.lower
= temp64
.val32
.lower
;
3189 curr_sg
[sg_index
].Addr
.upper
= temp64
.val32
.upper
;
3191 pci_dma_sync_single_for_device(h
->pdev
,
3192 h
->cmd_sg_list
[c
->cmdindex
]->sg_chain_dma
,
3196 /* track how many SG entries we are using */
3201 printk(KERN_DEBUG
"cciss: Submitting %ld sectors in %d segments "
3203 blk_rq_sectors(creq
), seg
, chained
);
3204 #endif /* CCISS_DEBUG */
3206 c
->Header
.SGList
= c
->Header
.SGTotal
= seg
+ chained
;
3207 if (seg
> h
->max_cmd_sgentries
)
3208 c
->Header
.SGList
= h
->max_cmd_sgentries
;
3210 if (likely(blk_fs_request(creq
))) {
3211 if(h
->cciss_read
== CCISS_READ_10
) {
3212 c
->Request
.CDB
[1] = 0;
3213 c
->Request
.CDB
[2] = (start_blk
>> 24) & 0xff; /* MSB */
3214 c
->Request
.CDB
[3] = (start_blk
>> 16) & 0xff;
3215 c
->Request
.CDB
[4] = (start_blk
>> 8) & 0xff;
3216 c
->Request
.CDB
[5] = start_blk
& 0xff;
3217 c
->Request
.CDB
[6] = 0; /* (sect >> 24) & 0xff; MSB */
3218 c
->Request
.CDB
[7] = (blk_rq_sectors(creq
) >> 8) & 0xff;
3219 c
->Request
.CDB
[8] = blk_rq_sectors(creq
) & 0xff;
3220 c
->Request
.CDB
[9] = c
->Request
.CDB
[11] = c
->Request
.CDB
[12] = 0;
3222 u32 upper32
= upper_32_bits(start_blk
);
3224 c
->Request
.CDBLen
= 16;
3225 c
->Request
.CDB
[1]= 0;
3226 c
->Request
.CDB
[2]= (upper32
>> 24) & 0xff; /* MSB */
3227 c
->Request
.CDB
[3]= (upper32
>> 16) & 0xff;
3228 c
->Request
.CDB
[4]= (upper32
>> 8) & 0xff;
3229 c
->Request
.CDB
[5]= upper32
& 0xff;
3230 c
->Request
.CDB
[6]= (start_blk
>> 24) & 0xff;
3231 c
->Request
.CDB
[7]= (start_blk
>> 16) & 0xff;
3232 c
->Request
.CDB
[8]= (start_blk
>> 8) & 0xff;
3233 c
->Request
.CDB
[9]= start_blk
& 0xff;
3234 c
->Request
.CDB
[10]= (blk_rq_sectors(creq
) >> 24) & 0xff;
3235 c
->Request
.CDB
[11]= (blk_rq_sectors(creq
) >> 16) & 0xff;
3236 c
->Request
.CDB
[12]= (blk_rq_sectors(creq
) >> 8) & 0xff;
3237 c
->Request
.CDB
[13]= blk_rq_sectors(creq
) & 0xff;
3238 c
->Request
.CDB
[14] = c
->Request
.CDB
[15] = 0;
3240 } else if (blk_pc_request(creq
)) {
3241 c
->Request
.CDBLen
= creq
->cmd_len
;
3242 memcpy(c
->Request
.CDB
, creq
->cmd
, BLK_MAX_CDB
);
3244 printk(KERN_WARNING
"cciss%d: bad request type %d\n", h
->ctlr
, creq
->cmd_type
);
3248 spin_lock_irq(q
->queue_lock
);
3252 if (h
->Qdepth
> h
->maxQsinceinit
)
3253 h
->maxQsinceinit
= h
->Qdepth
;
3259 /* We will already have the driver lock here so not need
3265 static inline unsigned long get_next_completion(ctlr_info_t
*h
)
3267 return h
->access
.command_completed(h
);
3270 static inline int interrupt_pending(ctlr_info_t
*h
)
3272 return h
->access
.intr_pending(h
);
3275 static inline long interrupt_not_for_us(ctlr_info_t
*h
)
3277 return (((h
->access
.intr_pending(h
) == 0) ||
3278 (h
->interrupts_enabled
== 0)));
3281 static irqreturn_t
do_cciss_intr(int irq
, void *dev_id
)
3283 ctlr_info_t
*h
= dev_id
;
3284 CommandList_struct
*c
;
3285 unsigned long flags
;
3288 if (interrupt_not_for_us(h
))
3291 * If there are completed commands in the completion queue,
3292 * we had better do something about it.
3294 spin_lock_irqsave(CCISS_LOCK(h
->ctlr
), flags
);
3295 while (interrupt_pending(h
)) {
3296 while ((a
= get_next_completion(h
)) != FIFO_EMPTY
) {
3300 if (a2
>= h
->nr_cmds
) {
3302 "cciss: controller cciss%d failed, stopping.\n",
3304 fail_all_cmds(h
->ctlr
);
3308 c
= h
->cmd_pool
+ a2
;
3312 struct hlist_node
*tmp
;
3316 hlist_for_each_entry(c
, tmp
, &h
->cmpQ
, list
) {
3317 if (c
->busaddr
== a
)
3322 * If we've found the command, take it off the
3323 * completion Q and free it
3325 if (c
&& c
->busaddr
== a
) {
3327 if (c
->cmd_type
== CMD_RWREQ
) {
3328 complete_command(h
, c
, 0);
3329 } else if (c
->cmd_type
== CMD_IOCTL_PEND
) {
3330 complete(c
->waiting
);
3332 # ifdef CONFIG_CISS_SCSI_TAPE
3333 else if (c
->cmd_type
== CMD_SCSI
)
3334 complete_scsi_command(c
, 0, a1
);
3341 spin_unlock_irqrestore(CCISS_LOCK(h
->ctlr
), flags
);
3346 * add_to_scan_list() - add controller to rescan queue
3347 * @h: Pointer to the controller.
3349 * Adds the controller to the rescan queue if not already on the queue.
3351 * returns 1 if added to the queue, 0 if skipped (could be on the
3352 * queue already, or the controller could be initializing or shutting
3355 static int add_to_scan_list(struct ctlr_info
*h
)
3357 struct ctlr_info
*test_h
;
3361 if (h
->busy_initializing
)
3364 if (!mutex_trylock(&h
->busy_shutting_down
))
3367 mutex_lock(&scan_mutex
);
3368 list_for_each_entry(test_h
, &scan_q
, scan_list
) {
3374 if (!found
&& !h
->busy_scanning
) {
3375 INIT_COMPLETION(h
->scan_wait
);
3376 list_add_tail(&h
->scan_list
, &scan_q
);
3379 mutex_unlock(&scan_mutex
);
3380 mutex_unlock(&h
->busy_shutting_down
);
3386 * remove_from_scan_list() - remove controller from rescan queue
3387 * @h: Pointer to the controller.
3389 * Removes the controller from the rescan queue if present. Blocks if
3390 * the controller is currently conducting a rescan. The controller
3391 * can be in one of three states:
3392 * 1. Doesn't need a scan
3393 * 2. On the scan list, but not scanning yet (we remove it)
3394 * 3. Busy scanning (and not on the list). In this case we want to wait for
3395 * the scan to complete to make sure the scanning thread for this
3396 * controller is completely idle.
3398 static void remove_from_scan_list(struct ctlr_info
*h
)
3400 struct ctlr_info
*test_h
, *tmp_h
;
3402 mutex_lock(&scan_mutex
);
3403 list_for_each_entry_safe(test_h
, tmp_h
, &scan_q
, scan_list
) {
3404 if (test_h
== h
) { /* state 2. */
3405 list_del(&h
->scan_list
);
3406 complete_all(&h
->scan_wait
);
3407 mutex_unlock(&scan_mutex
);
3411 if (h
->busy_scanning
) { /* state 3. */
3412 mutex_unlock(&scan_mutex
);
3413 wait_for_completion(&h
->scan_wait
);
3414 } else { /* state 1, nothing to do. */
3415 mutex_unlock(&scan_mutex
);
3420 * scan_thread() - kernel thread used to rescan controllers
3423 * A kernel thread used scan for drive topology changes on
3424 * controllers. The thread processes only one controller at a time
3425 * using a queue. Controllers are added to the queue using
3426 * add_to_scan_list() and removed from the queue either after done
3427 * processing or using remove_from_scan_list().
3431 static int scan_thread(void *data
)
3433 struct ctlr_info
*h
;
3436 set_current_state(TASK_INTERRUPTIBLE
);
3438 if (kthread_should_stop())
3442 mutex_lock(&scan_mutex
);
3443 if (list_empty(&scan_q
)) {
3444 mutex_unlock(&scan_mutex
);
3448 h
= list_entry(scan_q
.next
,
3451 list_del(&h
->scan_list
);
3452 h
->busy_scanning
= 1;
3453 mutex_unlock(&scan_mutex
);
3455 rebuild_lun_table(h
, 0, 0);
3456 complete_all(&h
->scan_wait
);
3457 mutex_lock(&scan_mutex
);
3458 h
->busy_scanning
= 0;
3459 mutex_unlock(&scan_mutex
);
3466 static int check_for_unit_attention(ctlr_info_t
*h
, CommandList_struct
*c
)
3468 if (c
->err_info
->SenseInfo
[2] != UNIT_ATTENTION
)
3471 switch (c
->err_info
->SenseInfo
[12]) {
3473 printk(KERN_WARNING
"cciss%d: a state change "
3474 "detected, command retried\n", h
->ctlr
);
3478 printk(KERN_WARNING
"cciss%d: LUN failure "
3479 "detected, action required\n", h
->ctlr
);
3482 case REPORT_LUNS_CHANGED
:
3483 printk(KERN_WARNING
"cciss%d: report LUN data "
3484 "changed\n", h
->ctlr
);
3486 * Here, we could call add_to_scan_list and wake up the scan thread,
3487 * except that it's quite likely that we will get more than one
3488 * REPORT_LUNS_CHANGED condition in quick succession, which means
3489 * that those which occur after the first one will likely happen
3490 * *during* the scan_thread's rescan. And the rescan code is not
3491 * robust enough to restart in the middle, undoing what it has already
3492 * done, and it's not clear that it's even possible to do this, since
3493 * part of what it does is notify the block layer, which starts
3494 * doing it's own i/o to read partition tables and so on, and the
3495 * driver doesn't have visibility to know what might need undoing.
3496 * In any event, if possible, it is horribly complicated to get right
3497 * so we just don't do it for now.
3499 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3503 case POWER_OR_RESET
:
3504 printk(KERN_WARNING
"cciss%d: a power on "
3505 "or device reset detected\n", h
->ctlr
);
3508 case UNIT_ATTENTION_CLEARED
:
3509 printk(KERN_WARNING
"cciss%d: unit attention "
3510 "cleared by another initiator\n", h
->ctlr
);
3514 printk(KERN_WARNING
"cciss%d: unknown "
3515 "unit attention detected\n", h
->ctlr
);
3521 * We cannot read the structure directly, for portability we must use
3523 * This is for debug only.
3526 static void print_cfg_table(CfgTable_struct
*tb
)
3531 printk("Controller Configuration information\n");
3532 printk("------------------------------------\n");
3533 for (i
= 0; i
< 4; i
++)
3534 temp_name
[i
] = readb(&(tb
->Signature
[i
]));
3535 temp_name
[4] = '\0';
3536 printk(" Signature = %s\n", temp_name
);
3537 printk(" Spec Number = %d\n", readl(&(tb
->SpecValence
)));
3538 printk(" Transport methods supported = 0x%x\n",
3539 readl(&(tb
->TransportSupport
)));
3540 printk(" Transport methods active = 0x%x\n",
3541 readl(&(tb
->TransportActive
)));
3542 printk(" Requested transport Method = 0x%x\n",
3543 readl(&(tb
->HostWrite
.TransportRequest
)));
3544 printk(" Coalesce Interrupt Delay = 0x%x\n",
3545 readl(&(tb
->HostWrite
.CoalIntDelay
)));
3546 printk(" Coalesce Interrupt Count = 0x%x\n",
3547 readl(&(tb
->HostWrite
.CoalIntCount
)));
3548 printk(" Max outstanding commands = 0x%d\n",
3549 readl(&(tb
->CmdsOutMax
)));
3550 printk(" Bus Types = 0x%x\n", readl(&(tb
->BusTypes
)));
3551 for (i
= 0; i
< 16; i
++)
3552 temp_name
[i
] = readb(&(tb
->ServerName
[i
]));
3553 temp_name
[16] = '\0';
3554 printk(" Server Name = %s\n", temp_name
);
3555 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb
->HeartBeat
)));
3557 #endif /* CCISS_DEBUG */
3559 static int find_PCI_BAR_index(struct pci_dev
*pdev
, unsigned long pci_bar_addr
)
3561 int i
, offset
, mem_type
, bar_type
;
3562 if (pci_bar_addr
== PCI_BASE_ADDRESS_0
) /* looking for BAR zero? */
3565 for (i
= 0; i
< DEVICE_COUNT_RESOURCE
; i
++) {
3566 bar_type
= pci_resource_flags(pdev
, i
) & PCI_BASE_ADDRESS_SPACE
;
3567 if (bar_type
== PCI_BASE_ADDRESS_SPACE_IO
)
3570 mem_type
= pci_resource_flags(pdev
, i
) &
3571 PCI_BASE_ADDRESS_MEM_TYPE_MASK
;
3573 case PCI_BASE_ADDRESS_MEM_TYPE_32
:
3574 case PCI_BASE_ADDRESS_MEM_TYPE_1M
:
3575 offset
+= 4; /* 32 bit */
3577 case PCI_BASE_ADDRESS_MEM_TYPE_64
:
3580 default: /* reserved in PCI 2.2 */
3582 "Base address is invalid\n");
3587 if (offset
== pci_bar_addr
- PCI_BASE_ADDRESS_0
)
3593 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3594 * controllers that are capable. If not, we use IO-APIC mode.
3597 static void __devinit
cciss_interrupt_mode(ctlr_info_t
*c
,
3598 struct pci_dev
*pdev
, __u32 board_id
)
3600 #ifdef CONFIG_PCI_MSI
3602 struct msix_entry cciss_msix_entries
[4] = { {0, 0}, {0, 1},
3606 /* Some boards advertise MSI but don't really support it */
3607 if ((board_id
== 0x40700E11) ||
3608 (board_id
== 0x40800E11) ||
3609 (board_id
== 0x40820E11) || (board_id
== 0x40830E11))
3610 goto default_int_mode
;
3612 if (pci_find_capability(pdev
, PCI_CAP_ID_MSIX
)) {
3613 err
= pci_enable_msix(pdev
, cciss_msix_entries
, 4);
3615 c
->intr
[0] = cciss_msix_entries
[0].vector
;
3616 c
->intr
[1] = cciss_msix_entries
[1].vector
;
3617 c
->intr
[2] = cciss_msix_entries
[2].vector
;
3618 c
->intr
[3] = cciss_msix_entries
[3].vector
;
3623 printk(KERN_WARNING
"cciss: only %d MSI-X vectors "
3624 "available\n", err
);
3625 goto default_int_mode
;
3627 printk(KERN_WARNING
"cciss: MSI-X init failed %d\n",
3629 goto default_int_mode
;
3632 if (pci_find_capability(pdev
, PCI_CAP_ID_MSI
)) {
3633 if (!pci_enable_msi(pdev
)) {
3636 printk(KERN_WARNING
"cciss: MSI init failed\n");
3640 #endif /* CONFIG_PCI_MSI */
3641 /* if we get here we're going to use the default interrupt mode */
3642 c
->intr
[SIMPLE_MODE_INT
] = pdev
->irq
;
3646 static int __devinit
cciss_pci_init(ctlr_info_t
*c
, struct pci_dev
*pdev
)
3648 ushort subsystem_vendor_id
, subsystem_device_id
, command
;
3649 __u32 board_id
, scratchpad
= 0;
3651 __u32 cfg_base_addr
;
3652 __u64 cfg_base_addr_index
;
3653 int i
, prod_index
, err
;
3655 subsystem_vendor_id
= pdev
->subsystem_vendor
;
3656 subsystem_device_id
= pdev
->subsystem_device
;
3657 board_id
= (((__u32
) (subsystem_device_id
<< 16) & 0xffff0000) |
3658 subsystem_vendor_id
);
3660 for (i
= 0; i
< ARRAY_SIZE(products
); i
++) {
3661 /* Stand aside for hpsa driver on request */
3662 if (cciss_allow_hpsa
&& products
[i
].board_id
== HPSA_BOUNDARY
)
3664 if (board_id
== products
[i
].board_id
)
3668 if (prod_index
== ARRAY_SIZE(products
)) {
3669 dev_warn(&pdev
->dev
,
3670 "unrecognized board ID: 0x%08lx, ignoring.\n",
3671 (unsigned long) board_id
);
3675 /* check to see if controller has been disabled */
3676 /* BEFORE trying to enable it */
3677 (void)pci_read_config_word(pdev
, PCI_COMMAND
, &command
);
3678 if (!(command
& 0x02)) {
3680 "cciss: controller appears to be disabled\n");
3684 err
= pci_enable_device(pdev
);
3686 printk(KERN_ERR
"cciss: Unable to Enable PCI device\n");
3690 err
= pci_request_regions(pdev
, "cciss");
3692 printk(KERN_ERR
"cciss: Cannot obtain PCI resources, "
3698 printk("command = %x\n", command
);
3699 printk("irq = %x\n", pdev
->irq
);
3700 printk("board_id = %x\n", board_id
);
3701 #endif /* CCISS_DEBUG */
3703 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3704 * else we use the IO-APIC interrupt assigned to us by system ROM.
3706 cciss_interrupt_mode(c
, pdev
, board_id
);
3708 /* find the memory BAR */
3709 for (i
= 0; i
< DEVICE_COUNT_RESOURCE
; i
++) {
3710 if (pci_resource_flags(pdev
, i
) & IORESOURCE_MEM
)
3713 if (i
== DEVICE_COUNT_RESOURCE
) {
3714 printk(KERN_WARNING
"cciss: No memory BAR found\n");
3716 goto err_out_free_res
;
3719 c
->paddr
= pci_resource_start(pdev
, i
); /* addressing mode bits
3724 printk("address 0 = %lx\n", c
->paddr
);
3725 #endif /* CCISS_DEBUG */
3726 c
->vaddr
= remap_pci_mem(c
->paddr
, 0x250);
3728 /* Wait for the board to become ready. (PCI hotplug needs this.)
3729 * We poll for up to 120 secs, once per 100ms. */
3730 for (i
= 0; i
< 1200; i
++) {
3731 scratchpad
= readl(c
->vaddr
+ SA5_SCRATCHPAD_OFFSET
);
3732 if (scratchpad
== CCISS_FIRMWARE_READY
)
3734 set_current_state(TASK_INTERRUPTIBLE
);
3735 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
3737 if (scratchpad
!= CCISS_FIRMWARE_READY
) {
3738 printk(KERN_WARNING
"cciss: Board not ready. Timed out.\n");
3740 goto err_out_free_res
;
3743 /* get the address index number */
3744 cfg_base_addr
= readl(c
->vaddr
+ SA5_CTCFG_OFFSET
);
3745 cfg_base_addr
&= (__u32
) 0x0000ffff;
3747 printk("cfg base address = %x\n", cfg_base_addr
);
3748 #endif /* CCISS_DEBUG */
3749 cfg_base_addr_index
= find_PCI_BAR_index(pdev
, cfg_base_addr
);
3751 printk("cfg base address index = %llx\n",
3752 (unsigned long long)cfg_base_addr_index
);
3753 #endif /* CCISS_DEBUG */
3754 if (cfg_base_addr_index
== -1) {
3755 printk(KERN_WARNING
"cciss: Cannot find cfg_base_addr_index\n");
3757 goto err_out_free_res
;
3760 cfg_offset
= readl(c
->vaddr
+ SA5_CTMEM_OFFSET
);
3762 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset
);
3763 #endif /* CCISS_DEBUG */
3764 c
->cfgtable
= remap_pci_mem(pci_resource_start(pdev
,
3765 cfg_base_addr_index
) +
3766 cfg_offset
, sizeof(CfgTable_struct
));
3767 c
->board_id
= board_id
;
3770 print_cfg_table(c
->cfgtable
);
3771 #endif /* CCISS_DEBUG */
3773 /* Some controllers support Zero Memory Raid (ZMR).
3774 * When configured in ZMR mode the number of supported
3775 * commands drops to 64. So instead of just setting an
3776 * arbitrary value we make the driver a little smarter.
3777 * We read the config table to tell us how many commands
3778 * are supported on the controller then subtract 4 to
3779 * leave a little room for ioctl calls.
3781 c
->max_commands
= readl(&(c
->cfgtable
->CmdsOutMax
));
3782 c
->maxsgentries
= readl(&(c
->cfgtable
->MaxSGElements
));
3785 * Limit native command to 32 s/g elements to save dma'able memory.
3786 * Howvever spec says if 0, use 31
3789 c
->max_cmd_sgentries
= 31;
3790 if (c
->maxsgentries
> 512) {
3791 c
->max_cmd_sgentries
= 32;
3792 c
->chainsize
= c
->maxsgentries
- c
->max_cmd_sgentries
+ 1;
3793 c
->maxsgentries
-= 1; /* account for chain pointer */
3795 c
->maxsgentries
= 31; /* Default to traditional value */
3796 c
->chainsize
= 0; /* traditional */
3799 c
->product_name
= products
[prod_index
].product_name
;
3800 c
->access
= *(products
[prod_index
].access
);
3801 c
->nr_cmds
= c
->max_commands
- 4;
3802 if ((readb(&c
->cfgtable
->Signature
[0]) != 'C') ||
3803 (readb(&c
->cfgtable
->Signature
[1]) != 'I') ||
3804 (readb(&c
->cfgtable
->Signature
[2]) != 'S') ||
3805 (readb(&c
->cfgtable
->Signature
[3]) != 'S')) {
3806 printk("Does not appear to be a valid CISS config table\n");
3808 goto err_out_free_res
;
3812 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3814 prefetch
= readl(&(c
->cfgtable
->SCSI_Prefetch
));
3816 writel(prefetch
, &(c
->cfgtable
->SCSI_Prefetch
));
3820 /* Disabling DMA prefetch and refetch for the P600.
3821 * An ASIC bug may result in accesses to invalid memory addresses.
3822 * We've disabled prefetch for some time now. Testing with XEN
3823 * kernels revealed a bug in the refetch if dom0 resides on a P600.
3825 if(board_id
== 0x3225103C) {
3828 dma_prefetch
= readl(c
->vaddr
+ I2O_DMA1_CFG
);
3829 dma_prefetch
|= 0x8000;
3830 writel(dma_prefetch
, c
->vaddr
+ I2O_DMA1_CFG
);
3831 pci_read_config_dword(pdev
, PCI_COMMAND_PARITY
, &dma_refetch
);
3833 pci_write_config_dword(pdev
, PCI_COMMAND_PARITY
, dma_refetch
);
3837 printk("Trying to put board into Simple mode\n");
3838 #endif /* CCISS_DEBUG */
3839 c
->max_commands
= readl(&(c
->cfgtable
->CmdsOutMax
));
3840 /* Update the field, and then ring the doorbell */
3841 writel(CFGTBL_Trans_Simple
, &(c
->cfgtable
->HostWrite
.TransportRequest
));
3842 writel(CFGTBL_ChangeReq
, c
->vaddr
+ SA5_DOORBELL
);
3844 /* under certain very rare conditions, this can take awhile.
3845 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3846 * as we enter this code.) */
3847 for (i
= 0; i
< MAX_CONFIG_WAIT
; i
++) {
3848 if (!(readl(c
->vaddr
+ SA5_DOORBELL
) & CFGTBL_ChangeReq
))
3850 /* delay and try again */
3851 set_current_state(TASK_INTERRUPTIBLE
);
3852 schedule_timeout(msecs_to_jiffies(1));
3856 printk(KERN_DEBUG
"I counter got to %d %x\n", i
,
3857 readl(c
->vaddr
+ SA5_DOORBELL
));
3858 #endif /* CCISS_DEBUG */
3860 print_cfg_table(c
->cfgtable
);
3861 #endif /* CCISS_DEBUG */
3863 if (!(readl(&(c
->cfgtable
->TransportActive
)) & CFGTBL_Trans_Simple
)) {
3864 printk(KERN_WARNING
"cciss: unable to get board into"
3867 goto err_out_free_res
;
3873 * Deliberately omit pci_disable_device(): it does something nasty to
3874 * Smart Array controllers that pci_enable_device does not undo
3876 pci_release_regions(pdev
);
3880 /* Function to find the first free pointer into our hba[] array
3881 * Returns -1 if no free entries are left.
3883 static int alloc_cciss_hba(void)
3887 for (i
= 0; i
< MAX_CTLR
; i
++) {
3891 p
= kzalloc(sizeof(ctlr_info_t
), GFP_KERNEL
);
3898 printk(KERN_WARNING
"cciss: This driver supports a maximum"
3899 " of %d controllers.\n", MAX_CTLR
);
3902 printk(KERN_ERR
"cciss: out of memory.\n");
3906 static void free_hba(int n
)
3908 ctlr_info_t
*h
= hba
[n
];
3912 for (i
= 0; i
< h
->highest_lun
+ 1; i
++)
3913 if (h
->gendisk
[i
] != NULL
)
3914 put_disk(h
->gendisk
[i
]);
3918 /* Send a message CDB to the firmware. */
3919 static __devinit
int cciss_message(struct pci_dev
*pdev
, unsigned char opcode
, unsigned char type
)
3922 CommandListHeader_struct CommandHeader
;
3923 RequestBlock_struct Request
;
3924 ErrDescriptor_struct ErrorDescriptor
;
3926 static const size_t cmd_sz
= sizeof(Command
) + sizeof(ErrorInfo_struct
);
3929 uint32_t paddr32
, tag
;
3930 void __iomem
*vaddr
;
3933 vaddr
= ioremap_nocache(pci_resource_start(pdev
, 0), pci_resource_len(pdev
, 0));
3937 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3938 CCISS commands, so they must be allocated from the lower 4GiB of
3940 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
3946 cmd
= pci_alloc_consistent(pdev
, cmd_sz
, &paddr64
);
3952 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3953 although there's no guarantee, we assume that the address is at
3954 least 4-byte aligned (most likely, it's page-aligned). */
3957 cmd
->CommandHeader
.ReplyQueue
= 0;
3958 cmd
->CommandHeader
.SGList
= 0;
3959 cmd
->CommandHeader
.SGTotal
= 0;
3960 cmd
->CommandHeader
.Tag
.lower
= paddr32
;
3961 cmd
->CommandHeader
.Tag
.upper
= 0;
3962 memset(&cmd
->CommandHeader
.LUN
.LunAddrBytes
, 0, 8);
3964 cmd
->Request
.CDBLen
= 16;
3965 cmd
->Request
.Type
.Type
= TYPE_MSG
;
3966 cmd
->Request
.Type
.Attribute
= ATTR_HEADOFQUEUE
;
3967 cmd
->Request
.Type
.Direction
= XFER_NONE
;
3968 cmd
->Request
.Timeout
= 0; /* Don't time out */
3969 cmd
->Request
.CDB
[0] = opcode
;
3970 cmd
->Request
.CDB
[1] = type
;
3971 memset(&cmd
->Request
.CDB
[2], 0, 14); /* the rest of the CDB is reserved */
3973 cmd
->ErrorDescriptor
.Addr
.lower
= paddr32
+ sizeof(Command
);
3974 cmd
->ErrorDescriptor
.Addr
.upper
= 0;
3975 cmd
->ErrorDescriptor
.Len
= sizeof(ErrorInfo_struct
);
3977 writel(paddr32
, vaddr
+ SA5_REQUEST_PORT_OFFSET
);
3979 for (i
= 0; i
< 10; i
++) {
3980 tag
= readl(vaddr
+ SA5_REPLY_PORT_OFFSET
);
3981 if ((tag
& ~3) == paddr32
)
3983 schedule_timeout_uninterruptible(HZ
);
3988 /* we leak the DMA buffer here ... no choice since the controller could
3989 still complete the command. */
3991 printk(KERN_ERR
"cciss: controller message %02x:%02x timed out\n",
3996 pci_free_consistent(pdev
, cmd_sz
, cmd
, paddr64
);
3999 printk(KERN_ERR
"cciss: controller message %02x:%02x failed\n",
4004 printk(KERN_INFO
"cciss: controller message %02x:%02x succeeded\n",
4009 #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4010 #define cciss_noop(p) cciss_message(p, 3, 0)
4012 static __devinit
int cciss_reset_msi(struct pci_dev
*pdev
)
4014 /* the #defines are stolen from drivers/pci/msi.h. */
4015 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4016 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4021 pos
= pci_find_capability(pdev
, PCI_CAP_ID_MSI
);
4023 pci_read_config_word(pdev
, msi_control_reg(pos
), &control
);
4024 if (control
& PCI_MSI_FLAGS_ENABLE
) {
4025 printk(KERN_INFO
"cciss: resetting MSI\n");
4026 pci_write_config_word(pdev
, msi_control_reg(pos
), control
& ~PCI_MSI_FLAGS_ENABLE
);
4030 pos
= pci_find_capability(pdev
, PCI_CAP_ID_MSIX
);
4032 pci_read_config_word(pdev
, msi_control_reg(pos
), &control
);
4033 if (control
& PCI_MSIX_FLAGS_ENABLE
) {
4034 printk(KERN_INFO
"cciss: resetting MSI-X\n");
4035 pci_write_config_word(pdev
, msi_control_reg(pos
), control
& ~PCI_MSIX_FLAGS_ENABLE
);
4042 /* This does a hard reset of the controller using PCI power management
4044 static __devinit
int cciss_hard_reset_controller(struct pci_dev
*pdev
)
4046 u16 pmcsr
, saved_config_space
[32];
4049 printk(KERN_INFO
"cciss: using PCI PM to reset controller\n");
4051 /* This is very nearly the same thing as
4053 pci_save_state(pci_dev);
4054 pci_set_power_state(pci_dev, PCI_D3hot);
4055 pci_set_power_state(pci_dev, PCI_D0);
4056 pci_restore_state(pci_dev);
4058 but we can't use these nice canned kernel routines on
4059 kexec, because they also check the MSI/MSI-X state in PCI
4060 configuration space and do the wrong thing when it is
4061 set/cleared. Also, the pci_save/restore_state functions
4062 violate the ordering requirements for restoring the
4063 configuration space from the CCISS document (see the
4064 comment below). So we roll our own .... */
4066 for (i
= 0; i
< 32; i
++)
4067 pci_read_config_word(pdev
, 2*i
, &saved_config_space
[i
]);
4069 pos
= pci_find_capability(pdev
, PCI_CAP_ID_PM
);
4071 printk(KERN_ERR
"cciss_reset_controller: PCI PM not supported\n");
4075 /* Quoting from the Open CISS Specification: "The Power
4076 * Management Control/Status Register (CSR) controls the power
4077 * state of the device. The normal operating state is D0,
4078 * CSR=00h. The software off state is D3, CSR=03h. To reset
4079 * the controller, place the interface device in D3 then to
4080 * D0, this causes a secondary PCI reset which will reset the
4083 /* enter the D3hot power management state */
4084 pci_read_config_word(pdev
, pos
+ PCI_PM_CTRL
, &pmcsr
);
4085 pmcsr
&= ~PCI_PM_CTRL_STATE_MASK
;
4087 pci_write_config_word(pdev
, pos
+ PCI_PM_CTRL
, pmcsr
);
4089 schedule_timeout_uninterruptible(HZ
>> 1);
4091 /* enter the D0 power management state */
4092 pmcsr
&= ~PCI_PM_CTRL_STATE_MASK
;
4094 pci_write_config_word(pdev
, pos
+ PCI_PM_CTRL
, pmcsr
);
4096 schedule_timeout_uninterruptible(HZ
>> 1);
4098 /* Restore the PCI configuration space. The Open CISS
4099 * Specification says, "Restore the PCI Configuration
4100 * Registers, offsets 00h through 60h. It is important to
4101 * restore the command register, 16-bits at offset 04h,
4102 * last. Do not restore the configuration status register,
4103 * 16-bits at offset 06h." Note that the offset is 2*i. */
4104 for (i
= 0; i
< 32; i
++) {
4105 if (i
== 2 || i
== 3)
4107 pci_write_config_word(pdev
, 2*i
, saved_config_space
[i
]);
4110 pci_write_config_word(pdev
, 4, saved_config_space
[2]);
4116 * This is it. Find all the controllers and register them. I really hate
4117 * stealing all these major device numbers.
4118 * returns the number of block devices registered.
4120 static int __devinit
cciss_init_one(struct pci_dev
*pdev
,
4121 const struct pci_device_id
*ent
)
4127 int dac
, return_code
;
4128 InquiryData_struct
*inq_buff
;
4130 if (reset_devices
) {
4131 /* Reset the controller with a PCI power-cycle */
4132 if (cciss_hard_reset_controller(pdev
) || cciss_reset_msi(pdev
))
4135 /* Now try to get the controller to respond to a no-op. Some
4136 devices (notably the HP Smart Array 5i Controller) need
4137 up to 30 seconds to respond. */
4138 for (i
=0; i
<30; i
++) {
4139 if (cciss_noop(pdev
) == 0)
4142 schedule_timeout_uninterruptible(HZ
);
4145 printk(KERN_ERR
"cciss: controller seems dead\n");
4150 i
= alloc_cciss_hba();
4154 hba
[i
]->busy_initializing
= 1;
4155 INIT_HLIST_HEAD(&hba
[i
]->cmpQ
);
4156 INIT_HLIST_HEAD(&hba
[i
]->reqQ
);
4157 mutex_init(&hba
[i
]->busy_shutting_down
);
4159 if (cciss_pci_init(hba
[i
], pdev
) != 0)
4160 goto clean_no_release_regions
;
4162 sprintf(hba
[i
]->devname
, "cciss%d", i
);
4164 hba
[i
]->pdev
= pdev
;
4166 init_completion(&hba
[i
]->scan_wait
);
4168 if (cciss_create_hba_sysfs_entry(hba
[i
]))
4171 /* configure PCI DMA stuff */
4172 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(64)))
4174 else if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(32)))
4177 printk(KERN_ERR
"cciss: no suitable DMA available\n");
4182 * register with the major number, or get a dynamic major number
4183 * by passing 0 as argument. This is done for greater than
4184 * 8 controller support.
4186 if (i
< MAX_CTLR_ORIG
)
4187 hba
[i
]->major
= COMPAQ_CISS_MAJOR
+ i
;
4188 rc
= register_blkdev(hba
[i
]->major
, hba
[i
]->devname
);
4189 if (rc
== -EBUSY
|| rc
== -EINVAL
) {
4191 "cciss: Unable to get major number %d for %s "
4192 "on hba %d\n", hba
[i
]->major
, hba
[i
]->devname
, i
);
4195 if (i
>= MAX_CTLR_ORIG
)
4199 /* make sure the board interrupts are off */
4200 hba
[i
]->access
.set_intr_mask(hba
[i
], CCISS_INTR_OFF
);
4201 if (request_irq(hba
[i
]->intr
[SIMPLE_MODE_INT
], do_cciss_intr
,
4202 IRQF_DISABLED
| IRQF_SHARED
, hba
[i
]->devname
, hba
[i
])) {
4203 printk(KERN_ERR
"cciss: Unable to get irq %d for %s\n",
4204 hba
[i
]->intr
[SIMPLE_MODE_INT
], hba
[i
]->devname
);
4208 printk(KERN_INFO
"%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
4209 hba
[i
]->devname
, pdev
->device
, pci_name(pdev
),
4210 hba
[i
]->intr
[SIMPLE_MODE_INT
], dac
? "" : " not");
4212 hba
[i
]->cmd_pool_bits
=
4213 kmalloc(DIV_ROUND_UP(hba
[i
]->nr_cmds
, BITS_PER_LONG
)
4214 * sizeof(unsigned long), GFP_KERNEL
);
4215 hba
[i
]->cmd_pool
= (CommandList_struct
*)
4216 pci_alloc_consistent(hba
[i
]->pdev
,
4217 hba
[i
]->nr_cmds
* sizeof(CommandList_struct
),
4218 &(hba
[i
]->cmd_pool_dhandle
));
4219 hba
[i
]->errinfo_pool
= (ErrorInfo_struct
*)
4220 pci_alloc_consistent(hba
[i
]->pdev
,
4221 hba
[i
]->nr_cmds
* sizeof(ErrorInfo_struct
),
4222 &(hba
[i
]->errinfo_pool_dhandle
));
4223 if ((hba
[i
]->cmd_pool_bits
== NULL
)
4224 || (hba
[i
]->cmd_pool
== NULL
)
4225 || (hba
[i
]->errinfo_pool
== NULL
)) {
4226 printk(KERN_ERR
"cciss: out of memory");
4230 /* Need space for temp scatter list */
4231 hba
[i
]->scatter_list
= kmalloc(hba
[i
]->max_commands
*
4232 sizeof(struct scatterlist
*),
4234 for (k
= 0; k
< hba
[i
]->nr_cmds
; k
++) {
4235 hba
[i
]->scatter_list
[k
] = kmalloc(sizeof(struct scatterlist
) *
4236 hba
[i
]->maxsgentries
,
4238 if (hba
[i
]->scatter_list
[k
] == NULL
) {
4239 printk(KERN_ERR
"cciss%d: could not allocate "
4244 hba
[i
]->cmd_sg_list
= kmalloc(sizeof(struct Cmd_sg_list
*) *
4247 if (!hba
[i
]->cmd_sg_list
) {
4248 printk(KERN_ERR
"cciss%d: Cannot get memory for "
4249 "s/g chaining.\n", i
);
4252 /* Build up chain blocks for each command */
4253 if (hba
[i
]->chainsize
> 0) {
4254 for (j
= 0; j
< hba
[i
]->nr_cmds
; j
++) {
4255 hba
[i
]->cmd_sg_list
[j
] =
4256 kmalloc(sizeof(struct Cmd_sg_list
),
4258 if (!hba
[i
]->cmd_sg_list
[j
]) {
4259 printk(KERN_ERR
"cciss%d: Cannot get memory "
4260 "for chain block.\n", i
);
4263 /* Need a block of chainsized s/g elements. */
4264 hba
[i
]->cmd_sg_list
[j
]->sgchain
=
4265 kmalloc((hba
[i
]->chainsize
*
4266 sizeof(SGDescriptor_struct
)),
4268 if (!hba
[i
]->cmd_sg_list
[j
]->sgchain
) {
4269 printk(KERN_ERR
"cciss%d: Cannot get memory "
4270 "for s/g chains\n", i
);
4276 spin_lock_init(&hba
[i
]->lock
);
4278 /* Initialize the pdev driver private data.
4279 have it point to hba[i]. */
4280 pci_set_drvdata(pdev
, hba
[i
]);
4281 /* command and error info recs zeroed out before
4283 memset(hba
[i
]->cmd_pool_bits
, 0,
4284 DIV_ROUND_UP(hba
[i
]->nr_cmds
, BITS_PER_LONG
)
4285 * sizeof(unsigned long));
4287 hba
[i
]->num_luns
= 0;
4288 hba
[i
]->highest_lun
= -1;
4289 for (j
= 0; j
< CISS_MAX_LUN
; j
++) {
4290 hba
[i
]->drv
[j
] = NULL
;
4291 hba
[i
]->gendisk
[j
] = NULL
;
4294 cciss_scsi_setup(i
);
4296 /* Turn the interrupts on so we can service requests */
4297 hba
[i
]->access
.set_intr_mask(hba
[i
], CCISS_INTR_ON
);
4299 /* Get the firmware version */
4300 inq_buff
= kzalloc(sizeof(InquiryData_struct
), GFP_KERNEL
);
4301 if (inq_buff
== NULL
) {
4302 printk(KERN_ERR
"cciss: out of memory\n");
4306 return_code
= sendcmd_withirq(CISS_INQUIRY
, i
, inq_buff
,
4307 sizeof(InquiryData_struct
), 0, CTLR_LUNID
, TYPE_CMD
);
4308 if (return_code
== IO_OK
) {
4309 hba
[i
]->firm_ver
[0] = inq_buff
->data_byte
[32];
4310 hba
[i
]->firm_ver
[1] = inq_buff
->data_byte
[33];
4311 hba
[i
]->firm_ver
[2] = inq_buff
->data_byte
[34];
4312 hba
[i
]->firm_ver
[3] = inq_buff
->data_byte
[35];
4313 } else { /* send command failed */
4314 printk(KERN_WARNING
"cciss: unable to determine firmware"
4315 " version of controller\n");
4321 hba
[i
]->cciss_max_sectors
= 8192;
4323 rebuild_lun_table(hba
[i
], 1, 0);
4324 hba
[i
]->busy_initializing
= 0;
4328 kfree(hba
[i
]->cmd_pool_bits
);
4329 /* Free up sg elements */
4330 for (k
= 0; k
< hba
[i
]->nr_cmds
; k
++)
4331 kfree(hba
[i
]->scatter_list
[k
]);
4332 kfree(hba
[i
]->scatter_list
);
4333 /* Only free up extra s/g lists if controller supports them */
4334 if (hba
[i
]->chainsize
> 0) {
4335 for (j
= 0; j
< hba
[i
]->nr_cmds
; j
++) {
4336 if (hba
[i
]->cmd_sg_list
[j
]) {
4337 kfree(hba
[i
]->cmd_sg_list
[j
]->sgchain
);
4338 kfree(hba
[i
]->cmd_sg_list
[j
]);
4341 kfree(hba
[i
]->cmd_sg_list
);
4343 if (hba
[i
]->cmd_pool
)
4344 pci_free_consistent(hba
[i
]->pdev
,
4345 hba
[i
]->nr_cmds
* sizeof(CommandList_struct
),
4346 hba
[i
]->cmd_pool
, hba
[i
]->cmd_pool_dhandle
);
4347 if (hba
[i
]->errinfo_pool
)
4348 pci_free_consistent(hba
[i
]->pdev
,
4349 hba
[i
]->nr_cmds
* sizeof(ErrorInfo_struct
),
4350 hba
[i
]->errinfo_pool
,
4351 hba
[i
]->errinfo_pool_dhandle
);
4352 free_irq(hba
[i
]->intr
[SIMPLE_MODE_INT
], hba
[i
]);
4354 unregister_blkdev(hba
[i
]->major
, hba
[i
]->devname
);
4356 cciss_destroy_hba_sysfs_entry(hba
[i
]);
4358 pci_release_regions(pdev
);
4359 clean_no_release_regions
:
4360 hba
[i
]->busy_initializing
= 0;
4363 * Deliberately omit pci_disable_device(): it does something nasty to
4364 * Smart Array controllers that pci_enable_device does not undo
4366 pci_set_drvdata(pdev
, NULL
);
4371 static void cciss_shutdown(struct pci_dev
*pdev
)
4377 h
= pci_get_drvdata(pdev
);
4378 flush_buf
= kzalloc(4, GFP_KERNEL
);
4381 "cciss:%d cache not flushed, out of memory.\n",
4385 /* write all data in the battery backed cache to disk */
4386 memset(flush_buf
, 0, 4);
4387 return_code
= sendcmd_withirq(CCISS_CACHE_FLUSH
, h
->ctlr
, flush_buf
,
4388 4, 0, CTLR_LUNID
, TYPE_CMD
);
4390 if (return_code
!= IO_OK
)
4391 printk(KERN_WARNING
"cciss%d: Error flushing cache\n",
4393 h
->access
.set_intr_mask(h
, CCISS_INTR_OFF
);
4394 free_irq(h
->intr
[2], h
);
4397 static void __devexit
cciss_remove_one(struct pci_dev
*pdev
)
4399 ctlr_info_t
*tmp_ptr
;
4402 if (pci_get_drvdata(pdev
) == NULL
) {
4403 printk(KERN_ERR
"cciss: Unable to remove device \n");
4407 tmp_ptr
= pci_get_drvdata(pdev
);
4409 if (hba
[i
] == NULL
) {
4410 printk(KERN_ERR
"cciss: device appears to "
4411 "already be removed \n");
4415 mutex_lock(&hba
[i
]->busy_shutting_down
);
4417 remove_from_scan_list(hba
[i
]);
4418 remove_proc_entry(hba
[i
]->devname
, proc_cciss
);
4419 unregister_blkdev(hba
[i
]->major
, hba
[i
]->devname
);
4421 /* remove it from the disk list */
4422 for (j
= 0; j
< CISS_MAX_LUN
; j
++) {
4423 struct gendisk
*disk
= hba
[i
]->gendisk
[j
];
4425 struct request_queue
*q
= disk
->queue
;
4427 if (disk
->flags
& GENHD_FL_UP
) {
4428 cciss_destroy_ld_sysfs_entry(hba
[i
], j
, 1);
4432 blk_cleanup_queue(q
);
4436 #ifdef CONFIG_CISS_SCSI_TAPE
4437 cciss_unregister_scsi(i
); /* unhook from SCSI subsystem */
4440 cciss_shutdown(pdev
);
4442 #ifdef CONFIG_PCI_MSI
4443 if (hba
[i
]->msix_vector
)
4444 pci_disable_msix(hba
[i
]->pdev
);
4445 else if (hba
[i
]->msi_vector
)
4446 pci_disable_msi(hba
[i
]->pdev
);
4447 #endif /* CONFIG_PCI_MSI */
4449 iounmap(hba
[i
]->vaddr
);
4451 pci_free_consistent(hba
[i
]->pdev
, hba
[i
]->nr_cmds
* sizeof(CommandList_struct
),
4452 hba
[i
]->cmd_pool
, hba
[i
]->cmd_pool_dhandle
);
4453 pci_free_consistent(hba
[i
]->pdev
, hba
[i
]->nr_cmds
* sizeof(ErrorInfo_struct
),
4454 hba
[i
]->errinfo_pool
, hba
[i
]->errinfo_pool_dhandle
);
4455 kfree(hba
[i
]->cmd_pool_bits
);
4456 /* Free up sg elements */
4457 for (j
= 0; j
< hba
[i
]->nr_cmds
; j
++)
4458 kfree(hba
[i
]->scatter_list
[j
]);
4459 kfree(hba
[i
]->scatter_list
);
4460 /* Only free up extra s/g lists if controller supports them */
4461 if (hba
[i
]->chainsize
> 0) {
4462 for (j
= 0; j
< hba
[i
]->nr_cmds
; j
++) {
4463 if (hba
[i
]->cmd_sg_list
[j
]) {
4464 kfree(hba
[i
]->cmd_sg_list
[j
]->sgchain
);
4465 kfree(hba
[i
]->cmd_sg_list
[j
]);
4468 kfree(hba
[i
]->cmd_sg_list
);
4471 * Deliberately omit pci_disable_device(): it does something nasty to
4472 * Smart Array controllers that pci_enable_device does not undo
4474 pci_release_regions(pdev
);
4475 pci_set_drvdata(pdev
, NULL
);
4476 cciss_destroy_hba_sysfs_entry(hba
[i
]);
4477 mutex_unlock(&hba
[i
]->busy_shutting_down
);
4481 static struct pci_driver cciss_pci_driver
= {
4483 .probe
= cciss_init_one
,
4484 .remove
= __devexit_p(cciss_remove_one
),
4485 .id_table
= cciss_pci_device_id
, /* id_table */
4486 .shutdown
= cciss_shutdown
,
4490 * This is it. Register the PCI driver information for the cards we control
4491 * the OS will call our registered routines when it finds one of our cards.
4493 static int __init
cciss_init(void)
4498 * The hardware requires that commands are aligned on a 64-bit
4499 * boundary. Given that we use pci_alloc_consistent() to allocate an
4500 * array of them, the size must be a multiple of 8 bytes.
4502 BUILD_BUG_ON(sizeof(CommandList_struct
) % 8);
4504 printk(KERN_INFO DRIVER_NAME
"\n");
4506 err
= bus_register(&cciss_bus_type
);
4510 /* Start the scan thread */
4511 cciss_scan_thread
= kthread_run(scan_thread
, NULL
, "cciss_scan");
4512 if (IS_ERR(cciss_scan_thread
)) {
4513 err
= PTR_ERR(cciss_scan_thread
);
4514 goto err_bus_unregister
;
4517 /* Register for our PCI devices */
4518 err
= pci_register_driver(&cciss_pci_driver
);
4520 goto err_thread_stop
;
4525 kthread_stop(cciss_scan_thread
);
4527 bus_unregister(&cciss_bus_type
);
4532 static void __exit
cciss_cleanup(void)
4536 pci_unregister_driver(&cciss_pci_driver
);
4537 /* double check that all controller entrys have been removed */
4538 for (i
= 0; i
< MAX_CTLR
; i
++) {
4539 if (hba
[i
] != NULL
) {
4540 printk(KERN_WARNING
"cciss: had to remove"
4541 " controller %d\n", i
);
4542 cciss_remove_one(hba
[i
]->pdev
);
4545 kthread_stop(cciss_scan_thread
);
4546 remove_proc_entry("driver/cciss", NULL
);
4547 bus_unregister(&cciss_bus_type
);
4550 static void fail_all_cmds(unsigned long ctlr
)
4552 /* If we get here, the board is apparently dead. */
4553 ctlr_info_t
*h
= hba
[ctlr
];
4554 CommandList_struct
*c
;
4555 unsigned long flags
;
4557 printk(KERN_WARNING
"cciss%d: controller not responding.\n", h
->ctlr
);
4558 h
->alive
= 0; /* the controller apparently died... */
4560 spin_lock_irqsave(CCISS_LOCK(ctlr
), flags
);
4562 pci_disable_device(h
->pdev
); /* Make sure it is really dead. */
4564 /* move everything off the request queue onto the completed queue */
4565 while (!hlist_empty(&h
->reqQ
)) {
4566 c
= hlist_entry(h
->reqQ
.first
, CommandList_struct
, list
);
4572 /* Now, fail everything on the completed queue with a HW error */
4573 while (!hlist_empty(&h
->cmpQ
)) {
4574 c
= hlist_entry(h
->cmpQ
.first
, CommandList_struct
, list
);
4576 if (c
->cmd_type
!= CMD_MSG_STALE
)
4577 c
->err_info
->CommandStatus
= CMD_HARDWARE_ERR
;
4578 if (c
->cmd_type
== CMD_RWREQ
) {
4579 complete_command(h
, c
, 0);
4580 } else if (c
->cmd_type
== CMD_IOCTL_PEND
)
4581 complete(c
->waiting
);
4582 #ifdef CONFIG_CISS_SCSI_TAPE
4583 else if (c
->cmd_type
== CMD_SCSI
)
4584 complete_scsi_command(c
, 0, 0);
4587 spin_unlock_irqrestore(CCISS_LOCK(ctlr
), flags
);
4591 module_init(cciss_init
);
4592 module_exit(cciss_cleanup
);