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scsi/i2o_block: cleanup ioctl handling
[deliverable/linux.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
841fdffd
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.26)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 26)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
841fdffd
MM		 65MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
66MODULE_VERSION("3.6.26");
1da177e4
LT		 67MODULE_LICENSE("GPL");
68
2ec24ff1
SC		 69static int cciss_allow_hpsa;
70module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
71MODULE_PARM_DESC(cciss_allow_hpsa,
72 "Prevent cciss driver from accessing hardware known to be "
73 " supported by the hpsa driver");
74
1da177e4
LT		 75#include "cciss_cmd.h"
76#include "cciss.h"
77#include <linux/cciss_ioctl.h>
78
79/* define the PCI info for the cards we can control */
80static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
841fdffd
MM		 108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3250},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3251},
110 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3252},
111 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3253},
112 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3254},
1da177e4
LT		 113 {0,}
114};
7c832835 115
1da177e4
LT		 116MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
117
1da177e4
LT		 118/* board_id = Subsystem Device ID & Vendor ID
119 * product = Marketing Name for the board
7c832835 120 * access = Address of the struct of function pointers
1da177e4
LT		 121 */
122static struct board_type products[] = {
49153998
MM		 123 {0x40700E11, "Smart Array 5300", &SA5_access},
124 {0x40800E11, "Smart Array 5i", &SA5B_access},
125 {0x40820E11, "Smart Array 532", &SA5B_access},
126 {0x40830E11, "Smart Array 5312", &SA5B_access},
127 {0x409A0E11, "Smart Array 641", &SA5_access},
128 {0x409B0E11, "Smart Array 642", &SA5_access},
129 {0x409C0E11, "Smart Array 6400", &SA5_access},
130 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
131 {0x40910E11, "Smart Array 6i", &SA5_access},
132 {0x3225103C, "Smart Array P600", &SA5_access},
49153998
MM		 133 {0x3235103C, "Smart Array P400i", &SA5_access},
134 {0x3211103C, "Smart Array E200i", &SA5_access},
135 {0x3212103C, "Smart Array E200", &SA5_access},
136 {0x3213103C, "Smart Array E200i", &SA5_access},
137 {0x3214103C, "Smart Array E200i", &SA5_access},
138 {0x3215103C, "Smart Array E200i", &SA5_access},
139 {0x3237103C, "Smart Array E500", &SA5_access},
2ec24ff1
SC		 140/* controllers below this line are also supported by the hpsa driver. */
141#define HPSA_BOUNDARY 0x3223103C
142 {0x3223103C, "Smart Array P800", &SA5_access},
143 {0x3234103C, "Smart Array P400", &SA5_access},
49153998
MM		 144 {0x323D103C, "Smart Array P700m", &SA5_access},
145 {0x3241103C, "Smart Array P212", &SA5_access},
146 {0x3243103C, "Smart Array P410", &SA5_access},
147 {0x3245103C, "Smart Array P410i", &SA5_access},
148 {0x3247103C, "Smart Array P411", &SA5_access},
149 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 150 {0x324A103C, "Smart Array P712m", &SA5_access},
151 {0x324B103C, "Smart Array P711m", &SA5_access},
841fdffd
MM		 152 {0x3250103C, "Smart Array", &SA5_access},
153 {0x3251103C, "Smart Array", &SA5_access},
154 {0x3252103C, "Smart Array", &SA5_access},
155 {0x3253103C, "Smart Array", &SA5_access},
156 {0x3254103C, "Smart Array", &SA5_access},
1da177e4
LT		 157};
158
d14c4ab5 159/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 160#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 161#define MAX_IOCTL_CONFIG_WAIT 1000
162
163/*define how many times we will try a command because of bus resets */
164#define MAX_CMD_RETRIES 3
165
1da177e4
LT		 166#define MAX_CTLR 32
167
168/* Originally cciss driver only supports 8 major numbers */
169#define MAX_CTLR_ORIG 8
170
1da177e4
LT		 171static ctlr_info_t *hba[MAX_CTLR];
172
b368c9dd
AP		 173static struct task_struct *cciss_scan_thread;
174static DEFINE_MUTEX(scan_mutex);
175static LIST_HEAD(scan_q);
176
165125e1 177static void do_cciss_request(struct request_queue *q);
0c2b3908
MM		 178static irqreturn_t do_cciss_intx(int irq, void *dev_id);
179static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
ef7822c2
AV		 180static int cciss_open(struct block_device *bdev, fmode_t mode);
181static int cciss_release(struct gendisk *disk, fmode_t mode);
182static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 183 unsigned int cmd, unsigned long arg);
a885c8c4 184static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 185
1da177e4 186static int cciss_revalidate(struct gendisk *disk);
2d11d993 187static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 188static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 189 int clear_all, int via_ioctl);
1da177e4 190
7b838bde 191static void cciss_read_capacity(int ctlr, int logvol,
00988a35 192 sector_t *total_size, unsigned int *block_size);
7b838bde 193static void cciss_read_capacity_16(int ctlr, int logvol,
00988a35
MMOD		 194 sector_t *total_size, unsigned int *block_size);
195static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 196 sector_t total_size,
00988a35 197 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 198 drive_info_struct *drv);
7c832835
BH		 199static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
200 __u32);
201static void start_io(ctlr_info_t *h);
7c832835 202static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 203 __u8 page_code, unsigned char scsi3addr[],
204 int cmd_type);
85cc61ae 205static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
206 int attempt_retry);
207static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 208
d6f4965d 209static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 210static int scan_thread(void *data);
211static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 212static void cciss_hba_release(struct device *dev);
213static void cciss_device_release(struct device *dev);
361e9b07 214static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
9cef0d2f 215static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
29979a71 216static inline u32 next_command(ctlr_info_t *h);
33079b21 217
5e216153
MM		 218/* performant mode helper functions */
219static void calc_bucket_map(int *bucket, int num_buckets, int nsgs,
220 int *bucket_map);
221static void cciss_put_controller_into_performant_mode(ctlr_info_t *h);
222
1da177e4 223#ifdef CONFIG_PROC_FS
1da177e4
LT		 224static void cciss_procinit(int i);
225#else
7c832835
BH		 226static void cciss_procinit(int i)
227{
228}
229#endif /* CONFIG_PROC_FS */
1da177e4
LT		 230
231#ifdef CONFIG_COMPAT
ef7822c2
AV		 232static int cciss_compat_ioctl(struct block_device *, fmode_t,
233 unsigned, unsigned long);
1da177e4
LT		 234#endif
235
83d5cde4 236static const struct block_device_operations cciss_fops = {
7c832835 237 .owner = THIS_MODULE,
ef7822c2
AV		 238 .open = cciss_open,
239 .release = cciss_release,
240 .locked_ioctl = cciss_ioctl,
7c832835 241 .getgeo = cciss_getgeo,
1da177e4 242#ifdef CONFIG_COMPAT
ef7822c2 243 .compat_ioctl = cciss_compat_ioctl,
1da177e4 244#endif
7c832835 245 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 246};
247
5e216153
MM		 248/* set_performant_mode: Modify the tag for cciss performant
249 * set bit 0 for pull model, bits 3-1 for block fetch
250 * register number
251 */
252static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
253{
254 if (likely(h->transMethod == CFGTBL_Trans_Performant))
255 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
256}
257
1da177e4
LT		 258/*
259 * Enqueuing and dequeuing functions for cmdlists.
260 */
8a3173de 261static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 262{
8a3173de 263 hlist_add_head(&c->list, list);
1da177e4
LT		 264}
265
8a3173de 266static inline void removeQ(CommandList_struct *c)
1da177e4 267{
b59e64d0
HR		 268 /*
269 * After kexec/dump some commands might still
270 * be in flight, which the firmware will try
271 * to complete. Resetting the firmware doesn't work
272 * with old fw revisions, so we have to mark
273 * them off as 'stale' to prevent the driver from
274 * falling over.
275 */
276 if (WARN_ON(hlist_unhashed(&c->list))) {
277 c->cmd_type = CMD_MSG_STALE;
8a3173de 278 return;
b59e64d0 279 }
8a3173de
JA		 280
281 hlist_del_init(&c->list);
1da177e4
LT		 282}
283
664a717d
MM		 284static void enqueue_cmd_and_start_io(ctlr_info_t *h,
285 CommandList_struct *c)
286{
287 unsigned long flags;
5e216153 288 set_performant_mode(h, c);
664a717d
MM		 289 spin_lock_irqsave(&h->lock, flags);
290 addQ(&h->reqQ, c);
291 h->Qdepth++;
292 start_io(h);
293 spin_unlock_irqrestore(&h->lock, flags);
294}
295
dccc9b56 296static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
49fc5601
SC		 297 int nr_cmds)
298{
299 int i;
300
301 if (!cmd_sg_list)
302 return;
303 for (i = 0; i < nr_cmds; i++) {
dccc9b56
SC		 304 kfree(cmd_sg_list[i]);
305 cmd_sg_list[i] = NULL;
49fc5601
SC		 306 }
307 kfree(cmd_sg_list);
308}
309
dccc9b56
SC		 310static SGDescriptor_struct **cciss_allocate_sg_chain_blocks(
311 ctlr_info_t *h, int chainsize, int nr_cmds)
49fc5601
SC		 312{
313 int j;
dccc9b56 314 SGDescriptor_struct **cmd_sg_list;
49fc5601
SC		 315
316 if (chainsize <= 0)
317 return NULL;
318
319 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
320 if (!cmd_sg_list)
321 return NULL;
322
323 /* Build up chain blocks for each command */
324 for (j = 0; j < nr_cmds; j++) {
49fc5601 325 /* Need a block of chainsized s/g elements. */
dccc9b56
SC		 326 cmd_sg_list[j] = kmalloc((chainsize *
327 sizeof(*cmd_sg_list[j])), GFP_KERNEL);
328 if (!cmd_sg_list[j]) {
49fc5601
SC		 329 dev_err(&h->pdev->dev, "Cannot get memory "
330 "for s/g chains.\n");
331 goto clean;
332 }
333 }
334 return cmd_sg_list;
335clean:
336 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
337 return NULL;
338}
339
d45033ef
SC		 340static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c)
341{
342 SGDescriptor_struct *chain_sg;
343 u64bit temp64;
344
345 if (c->Header.SGTotal <= h->max_cmd_sgentries)
346 return;
347
348 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
349 temp64.val32.lower = chain_sg->Addr.lower;
350 temp64.val32.upper = chain_sg->Addr.upper;
351 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
352}
353
354static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c,
355 SGDescriptor_struct *chain_block, int len)
356{
357 SGDescriptor_struct *chain_sg;
358 u64bit temp64;
359
360 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
361 chain_sg->Ext = CCISS_SG_CHAIN;
362 chain_sg->Len = len;
363 temp64.val = pci_map_single(h->pdev, chain_block, len,
364 PCI_DMA_TODEVICE);
365 chain_sg->Addr.lower = temp64.val32.lower;
366 chain_sg->Addr.upper = temp64.val32.upper;
367}
368
1da177e4
LT		 369#include "cciss_scsi.c" /* For SCSI tape support */
370
1e6f2dc1
AB		 371static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
372 "UNKNOWN"
373};
374#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
0f5486ec 375
1da177e4
LT		 376#ifdef CONFIG_PROC_FS
377
378/*
379 * Report information about this controller.
380 */
381#define ENG_GIG 1000000000
382#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 383#define ENGAGE_SCSI "engage scsi"
1da177e4
LT		 384
385static struct proc_dir_entry *proc_cciss;
386
89b6e743 387static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 388{
89b6e743
MM		 389 ctlr_info_t *h = seq->private;
390
391 seq_printf(seq, "%s: HP %s Controller\n"
392 "Board ID: 0x%08lx\n"
393 "Firmware Version: %c%c%c%c\n"
394 "IRQ: %d\n"
395 "Logical drives: %d\n"
396 "Current Q depth: %d\n"
397 "Current # commands on controller: %d\n"
398 "Max Q depth since init: %d\n"
399 "Max # commands on controller since init: %d\n"
400 "Max SG entries since init: %d\n",
401 h->devname,
402 h->product_name,
403 (unsigned long)h->board_id,
404 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
5e216153 405 h->firm_ver[3], (unsigned int)h->intr[PERF_MODE_INT],
89b6e743
MM		 406 h->num_luns,
407 h->Qdepth, h->commands_outstanding,
408 h->maxQsinceinit, h->max_outstanding, h->maxSG);
409
410#ifdef CONFIG_CISS_SCSI_TAPE
411 cciss_seq_tape_report(seq, h->ctlr);
412#endif /* CONFIG_CISS_SCSI_TAPE */
413}
1da177e4 414
89b6e743
MM		 415static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
416{
417 ctlr_info_t *h = seq->private;
418 unsigned ctlr = h->ctlr;
419 unsigned long flags;
1da177e4
LT		 420
421 /* prevent displaying bogus info during configuration
422 * or deconfiguration of a logical volume
423 */
424 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
425 if (h->busy_configuring) {
426 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 427 return ERR_PTR(-EBUSY);
1da177e4
LT		 428 }
429 h->busy_configuring = 1;
430 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
431
89b6e743
MM		 432 if (*pos == 0)
433 cciss_seq_show_header(seq);
434
435 return pos;
436}
437
438static int cciss_seq_show(struct seq_file *seq, void *v)
439{
440 sector_t vol_sz, vol_sz_frac;
441 ctlr_info_t *h = seq->private;
442 unsigned ctlr = h->ctlr;
443 loff_t *pos = v;
9cef0d2f 444 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 445
446 if (*pos > h->highest_lun)
447 return 0;
448
531c2dc7
SC		 449 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
450 return 0;
451
89b6e743
MM		 452 if (drv->heads == 0)
453 return 0;
454
455 vol_sz = drv->nr_blocks;
456 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
457 vol_sz_frac *= 100;
458 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
459
fa52bec9 460 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 461 drv->raid_level = RAID_UNKNOWN;
462 seq_printf(seq, "cciss/c%dd%d:"
463 "\t%4u.%02uGB\tRAID %s\n",
464 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
465 raid_label[drv->raid_level]);
466 return 0;
467}
468
469static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
470{
471 ctlr_info_t *h = seq->private;
472
473 if (*pos > h->highest_lun)
474 return NULL;
475 *pos += 1;
476
477 return pos;
478}
479
480static void cciss_seq_stop(struct seq_file *seq, void *v)
481{
482 ctlr_info_t *h = seq->private;
483
484 /* Only reset h->busy_configuring if we succeeded in setting
485 * it during cciss_seq_start. */
486 if (v == ERR_PTR(-EBUSY))
487 return;
7c832835 488
1da177e4 489 h->busy_configuring = 0;
1da177e4
LT		 490}
491
88e9d34c 492static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 493 .start = cciss_seq_start,
494 .show = cciss_seq_show,
495 .next = cciss_seq_next,
496 .stop = cciss_seq_stop,
497};
498
499static int cciss_seq_open(struct inode *inode, struct file *file)
500{
501 int ret = seq_open(file, &cciss_seq_ops);
502 struct seq_file *seq = file->private_data;
503
504 if (!ret)
505 seq->private = PDE(inode)->data;
506
507 return ret;
508}
509
510static ssize_t
511cciss_proc_write(struct file *file, const char __user *buf,
512 size_t length, loff_t *ppos)
1da177e4 513{
89b6e743
MM		 514 int err;
515 char *buffer;
516
517#ifndef CONFIG_CISS_SCSI_TAPE
518 return -EINVAL;
1da177e4
LT		 519#endif
520
89b6e743 521 if (!buf || length > PAGE_SIZE - 1)
7c832835 522 return -EINVAL;
89b6e743
MM		 523
524 buffer = (char *)__get_free_page(GFP_KERNEL);
525 if (!buffer)
526 return -ENOMEM;
527
528 err = -EFAULT;
529 if (copy_from_user(buffer, buf, length))
530 goto out;
531 buffer[length] = '\0';
532
533#ifdef CONFIG_CISS_SCSI_TAPE
534 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
535 struct seq_file *seq = file->private_data;
536 ctlr_info_t *h = seq->private;
89b6e743 537
8721c81f
SC		 538 err = cciss_engage_scsi(h->ctlr);
539 if (err == 0)
89b6e743
MM		 540 err = length;
541 } else
542#endif /* CONFIG_CISS_SCSI_TAPE */
543 err = -EINVAL;
7c832835
BH		 544 /* might be nice to have "disengage" too, but it's not
545 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 546
547out:
548 free_page((unsigned long)buffer);
549 return err;
1da177e4
LT		 550}
551
828c0950 552static const struct file_operations cciss_proc_fops = {
89b6e743
MM		 553 .owner = THIS_MODULE,
554 .open = cciss_seq_open,
555 .read = seq_read,
556 .llseek = seq_lseek,
557 .release = seq_release,
558 .write = cciss_proc_write,
559};
560
1da177e4
LT		 561static void __devinit cciss_procinit(int i)
562{
563 struct proc_dir_entry *pde;
564
89b6e743 565 if (proc_cciss == NULL)
928b4d8c 566 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 567 if (!proc_cciss)
568 return;
3dfcf9c4 569 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 570 S_IROTH, proc_cciss,
3dfcf9c4 571 &cciss_proc_fops, hba[i]);
1da177e4 572}
7c832835 573#endif /* CONFIG_PROC_FS */
1da177e4 574
7fe06326
AP		 575#define MAX_PRODUCT_NAME_LEN 19
576
577#define to_hba(n) container_of(n, struct ctlr_info, dev)
578#define to_drv(n) container_of(n, drive_info_struct, dev)
579
d6f4965d
AP		 580static ssize_t host_store_rescan(struct device *dev,
581 struct device_attribute *attr,
582 const char *buf, size_t count)
583{
584 struct ctlr_info *h = to_hba(dev);
585
586 add_to_scan_list(h);
587 wake_up_process(cciss_scan_thread);
588 wait_for_completion_interruptible(&h->scan_wait);
589
590 return count;
591}
8ba95c69 592static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 593
594static ssize_t dev_show_unique_id(struct device *dev,
595 struct device_attribute *attr,
596 char *buf)
597{
598 drive_info_struct *drv = to_drv(dev);
599 struct ctlr_info *h = to_hba(drv->dev.parent);
600 __u8 sn[16];
601 unsigned long flags;
602 int ret = 0;
603
604 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
605 if (h->busy_configuring)
606 ret = -EBUSY;
607 else
608 memcpy(sn, drv->serial_no, sizeof(sn));
609 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
610
611 if (ret)
612 return ret;
613 else
614 return snprintf(buf, 16 * 2 + 2,
615 "%02X%02X%02X%02X%02X%02X%02X%02X"
616 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
617 sn[0], sn[1], sn[2], sn[3],
618 sn[4], sn[5], sn[6], sn[7],
619 sn[8], sn[9], sn[10], sn[11],
620 sn[12], sn[13], sn[14], sn[15]);
621}
8ba95c69 622static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP		 623
624static ssize_t dev_show_vendor(struct device *dev,
625 struct device_attribute *attr,
626 char *buf)
627{
628 drive_info_struct *drv = to_drv(dev);
629 struct ctlr_info *h = to_hba(drv->dev.parent);
630 char vendor[VENDOR_LEN + 1];
631 unsigned long flags;
632 int ret = 0;
633
634 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
635 if (h->busy_configuring)
636 ret = -EBUSY;
637 else
638 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
639 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
640
641 if (ret)
642 return ret;
643 else
644 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
645}
8ba95c69 646static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP		 647
648static ssize_t dev_show_model(struct device *dev,
649 struct device_attribute *attr,
650 char *buf)
651{
652 drive_info_struct *drv = to_drv(dev);
653 struct ctlr_info *h = to_hba(drv->dev.parent);
654 char model[MODEL_LEN + 1];
655 unsigned long flags;
656 int ret = 0;
657
658 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
659 if (h->busy_configuring)
660 ret = -EBUSY;
661 else
662 memcpy(model, drv->model, MODEL_LEN + 1);
663 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
664
665 if (ret)
666 return ret;
667 else
668 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
669}
8ba95c69 670static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP		 671
672static ssize_t dev_show_rev(struct device *dev,
673 struct device_attribute *attr,
674 char *buf)
675{
676 drive_info_struct *drv = to_drv(dev);
677 struct ctlr_info *h = to_hba(drv->dev.parent);
678 char rev[REV_LEN + 1];
679 unsigned long flags;
680 int ret = 0;
681
682 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
683 if (h->busy_configuring)
684 ret = -EBUSY;
685 else
686 memcpy(rev, drv->rev, REV_LEN + 1);
687 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
688
689 if (ret)
690 return ret;
691 else
692 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
693}
8ba95c69 694static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 695
ce84a8ae
SC		 696static ssize_t cciss_show_lunid(struct device *dev,
697 struct device_attribute *attr, char *buf)
698{
9cef0d2f
SC		 699 drive_info_struct *drv = to_drv(dev);
700 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 701 unsigned long flags;
702 unsigned char lunid[8];
703
704 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
705 if (h->busy_configuring) {
706 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
707 return -EBUSY;
708 }
709 if (!drv->heads) {
710 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
711 return -ENOTTY;
712 }
713 memcpy(lunid, drv->LunID, sizeof(lunid));
714 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
715 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
716 lunid[0], lunid[1], lunid[2], lunid[3],
717 lunid[4], lunid[5], lunid[6], lunid[7]);
718}
8ba95c69 719static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 720
3ff1111d
SC		 721static ssize_t cciss_show_raid_level(struct device *dev,
722 struct device_attribute *attr, char *buf)
723{
9cef0d2f
SC		 724 drive_info_struct *drv = to_drv(dev);
725 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 726 int raid;
727 unsigned long flags;
728
729 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
730 if (h->busy_configuring) {
731 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
732 return -EBUSY;
733 }
734 raid = drv->raid_level;
735 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
736 if (raid < 0 || raid > RAID_UNKNOWN)
737 raid = RAID_UNKNOWN;
738
739 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
740 raid_label[raid]);
741}
8ba95c69 742static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 743
e272afec
SC		 744static ssize_t cciss_show_usage_count(struct device *dev,
745 struct device_attribute *attr, char *buf)
746{
9cef0d2f
SC		 747 drive_info_struct *drv = to_drv(dev);
748 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 749 unsigned long flags;
750 int count;
751
752 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
753 if (h->busy_configuring) {
754 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
755 return -EBUSY;
756 }
757 count = drv->usage_count;
758 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
759 return snprintf(buf, 20, "%d\n", count);
760}
8ba95c69 761static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 762
d6f4965d
AP		 763static struct attribute *cciss_host_attrs[] = {
764 &dev_attr_rescan.attr,
765 NULL
766};
767
768static struct attribute_group cciss_host_attr_group = {
769 .attrs = cciss_host_attrs,
770};
771
9f792d9f 772static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP		 773 &cciss_host_attr_group,
774 NULL
775};
776
777static struct device_type cciss_host_type = {
778 .name = "cciss_host",
779 .groups = cciss_host_attr_groups,
617e1344 780 .release = cciss_hba_release,
d6f4965d
AP		 781};
782
7fe06326
AP		 783static struct attribute *cciss_dev_attrs[] = {
784 &dev_attr_unique_id.attr,
785 &dev_attr_model.attr,
786 &dev_attr_vendor.attr,
787 &dev_attr_rev.attr,
ce84a8ae 788 &dev_attr_lunid.attr,
3ff1111d 789 &dev_attr_raid_level.attr,
e272afec 790 &dev_attr_usage_count.attr,
7fe06326
AP		 791 NULL
792};
793
794static struct attribute_group cciss_dev_attr_group = {
795 .attrs = cciss_dev_attrs,
796};
797
a4dbd674 798static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 799 &cciss_dev_attr_group,
800 NULL
801};
802
803static struct device_type cciss_dev_type = {
804 .name = "cciss_device",
805 .groups = cciss_dev_attr_groups,
617e1344 806 .release = cciss_device_release,
7fe06326
AP		 807};
808
809static struct bus_type cciss_bus_type = {
810 .name = "cciss",
811};
812
617e1344
SC		 813/*
814 * cciss_hba_release is called when the reference count
815 * of h->dev goes to zero.
816 */
817static void cciss_hba_release(struct device *dev)
818{
819 /*
820 * nothing to do, but need this to avoid a warning
821 * about not having a release handler from lib/kref.c.
822 */
823}
7fe06326
AP		 824
825/*
826 * Initialize sysfs entry for each controller. This sets up and registers
827 * the 'cciss#' directory for each individual controller under
828 * /sys/bus/pci/devices/<dev>/.
829 */
830static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
831{
832 device_initialize(&h->dev);
833 h->dev.type = &cciss_host_type;
834 h->dev.bus = &cciss_bus_type;
835 dev_set_name(&h->dev, "%s", h->devname);
836 h->dev.parent = &h->pdev->dev;
837
838 return device_add(&h->dev);
839}
840
841/*
842 * Remove sysfs entries for an hba.
843 */
844static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
845{
846 device_del(&h->dev);
617e1344
SC		 847 put_device(&h->dev); /* final put. */
848}
849
850/* cciss_device_release is called when the reference count
9cef0d2f 851 * of h->drv[x]dev goes to zero.
617e1344
SC		 852 */
853static void cciss_device_release(struct device *dev)
854{
9cef0d2f
SC		 855 drive_info_struct *drv = to_drv(dev);
856 kfree(drv);
7fe06326
AP		 857}
858
859/*
860 * Initialize sysfs for each logical drive. This sets up and registers
861 * the 'c#d#' directory for each individual logical drive under
862 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
863 * /sys/block/cciss!c#d# to this entry.
864 */
617e1344 865static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 866 int drv_index)
867{
617e1344
SC		 868 struct device *dev;
869
9cef0d2f 870 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 871 return 0;
872
9cef0d2f 873 dev = &h->drv[drv_index]->dev;
617e1344
SC		 874 device_initialize(dev);
875 dev->type = &cciss_dev_type;
876 dev->bus = &cciss_bus_type;
877 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
878 dev->parent = &h->dev;
9cef0d2f 879 h->drv[drv_index]->device_initialized = 1;
617e1344 880 return device_add(dev);
7fe06326
AP		 881}
882
883/*
884 * Remove sysfs entries for a logical drive.
885 */
8ce51966
SC		 886static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
887 int ctlr_exiting)
7fe06326 888{
9cef0d2f 889 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 890
891 /* special case for c*d0, we only destroy it on controller exit */
892 if (drv_index == 0 && !ctlr_exiting)
893 return;
894
617e1344
SC		 895 device_del(dev);
896 put_device(dev); /* the "final" put. */
9cef0d2f 897 h->drv[drv_index] = NULL;
7fe06326
AP		 898}
899
7c832835
BH		 900/*
901 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 902 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 903 * which ones are free or in use. For operations that can wait for kmalloc
904 * to possible sleep, this routine can be called with get_from_pool set to 0.
905 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
906 */
907static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 908{
909 CommandList_struct *c;
7c832835 910 int i;
1da177e4
LT		 911 u64bit temp64;
912 dma_addr_t cmd_dma_handle, err_dma_handle;
913
7c832835
BH		 914 if (!get_from_pool) {
915 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
916 sizeof(CommandList_struct), &cmd_dma_handle);
917 if (c == NULL)
918 return NULL;
1da177e4
LT		 919 memset(c, 0, sizeof(CommandList_struct));
920
33079b21
MM		 921 c->cmdindex = -1;
922
7c832835
BH		 923 c->err_info = (ErrorInfo_struct *)
924 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
925 &err_dma_handle);
926
927 if (c->err_info == NULL) {
928 pci_free_consistent(h->pdev,
1da177e4
LT		 929 sizeof(CommandList_struct), c, cmd_dma_handle);
930 return NULL;
931 }
932 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 933 } else { /* get it out of the controllers pool */
934
935 do {
f880632f
MM		 936 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
937 if (i == h->nr_cmds)
7c832835
BH		 938 return NULL;
939 } while (test_and_set_bit
940 (i & (BITS_PER_LONG - 1),
941 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 942#ifdef CCISS_DEBUG
943 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
944#endif
7c832835 945 c = h->cmd_pool + i;
1da177e4 946 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 947 cmd_dma_handle = h->cmd_pool_dhandle
948 + i * sizeof(CommandList_struct);
1da177e4
LT		 949 c->err_info = h->errinfo_pool + i;
950 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 951 err_dma_handle = h->errinfo_pool_dhandle
952 + i * sizeof(ErrorInfo_struct);
953 h->nr_allocs++;
33079b21
MM		 954
955 c->cmdindex = i;
7c832835 956 }
1da177e4 957
8a3173de 958 INIT_HLIST_NODE(&c->list);
1da177e4 959 c->busaddr = (__u32) cmd_dma_handle;
7c832835 960 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 961 c->ErrDesc.Addr.lower = temp64.val32.lower;
962 c->ErrDesc.Addr.upper = temp64.val32.upper;
963 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 964
7c832835
BH		 965 c->ctlr = h->ctlr;
966 return c;
1da177e4
LT		 967}
968
7c832835
BH		 969/*
970 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 971 */
972static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
973{
974 int i;
975 u64bit temp64;
976
7c832835 977 if (!got_from_pool) {
1da177e4
LT		 978 temp64.val32.lower = c->ErrDesc.Addr.lower;
979 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 980 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
981 c->err_info, (dma_addr_t) temp64.val);
982 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
983 c, (dma_addr_t) c->busaddr);
984 } else {
1da177e4 985 i = c - h->cmd_pool;
7c832835
BH		 986 clear_bit(i & (BITS_PER_LONG - 1),
987 h->cmd_pool_bits + (i / BITS_PER_LONG));
988 h->nr_frees++;
989 }
1da177e4
LT		 990}
991
992static inline ctlr_info_t *get_host(struct gendisk *disk)
993{
7c832835 994 return disk->queue->queuedata;
1da177e4
LT		 995}
996
997static inline drive_info_struct *get_drv(struct gendisk *disk)
998{
999 return disk->private_data;
1000}
1001
1002/*
1003 * Open. Make sure the device is really there.
1004 */
ef7822c2 1005static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 1006{
ef7822c2
AV		 1007 ctlr_info_t *host = get_host(bdev->bd_disk);
1008 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 1009
1010#ifdef CCISS_DEBUG
ef7822c2 1011 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 1012#endif /* CCISS_DEBUG */
1da177e4 1013
2e043986 1014 if (drv->busy_configuring)
ddd47442 1015 return -EBUSY;
1da177e4
LT		 1016 /*
1017 * Root is allowed to open raw volume zero even if it's not configured
1018 * so array config can still work. Root is also allowed to open any
1019 * volume that has a LUN ID, so it can issue IOCTL to reread the
1020 * disk information. I don't think I really like this
1021 * but I'm already using way to many device nodes to claim another one
1022 * for "raw controller".
1023 */
7a06f789 1024 if (drv->heads == 0) {
ef7822c2 1025 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 1026 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 1027 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 1028 return -ENXIO;
1da177e4 1029 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 1030 } else if (memcmp(drv->LunID, CTLR_LUNID,
1031 sizeof(drv->LunID))) {
1da177e4
LT		 1032 return -ENXIO;
1033 }
1034 }
1035 if (!capable(CAP_SYS_ADMIN))
1036 return -EPERM;
1037 }
1038 drv->usage_count++;
1039 host->usage_count++;
1040 return 0;
1041}
7c832835 1042
1da177e4
LT		 1043/*
1044 * Close. Sync first.
1045 */
ef7822c2 1046static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 1047{
ef7822c2
AV		 1048 ctlr_info_t *host = get_host(disk);
1049 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 1050
1051#ifdef CCISS_DEBUG
ef7822c2 1052 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 1053#endif /* CCISS_DEBUG */
1da177e4
LT		 1054
1055 drv->usage_count--;
1056 host->usage_count--;
1057 return 0;
1058}
1059
1060#ifdef CONFIG_COMPAT
1061
ef7822c2
AV		 1062static int do_ioctl(struct block_device *bdev, fmode_t mode,
1063 unsigned cmd, unsigned long arg)
1da177e4
LT		 1064{
1065 int ret;
1066 lock_kernel();
ef7822c2 1067 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1068 unlock_kernel();
1069 return ret;
1070}
1071
ef7822c2
AV		 1072static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1073 unsigned cmd, unsigned long arg);
1074static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1075 unsigned cmd, unsigned long arg);
1da177e4 1076
ef7822c2
AV		 1077static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1078 unsigned cmd, unsigned long arg)
1da177e4
LT		 1079{
1080 switch (cmd) {
1081 case CCISS_GETPCIINFO:
1082 case CCISS_GETINTINFO:
1083 case CCISS_SETINTINFO:
1084 case CCISS_GETNODENAME:
1085 case CCISS_SETNODENAME:
1086 case CCISS_GETHEARTBEAT:
1087 case CCISS_GETBUSTYPES:
1088 case CCISS_GETFIRMVER:
1089 case CCISS_GETDRIVVER:
1090 case CCISS_REVALIDVOLS:
1091 case CCISS_DEREGDISK:
1092 case CCISS_REGNEWDISK:
1093 case CCISS_REGNEWD:
1094 case CCISS_RESCANDISK:
1095 case CCISS_GETLUNINFO:
ef7822c2 1096 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1097
1098 case CCISS_PASSTHRU32:
ef7822c2 1099 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 1100 case CCISS_BIG_PASSTHRU32:
ef7822c2 1101 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 1102
1103 default:
1104 return -ENOIOCTLCMD;
1105 }
1106}
1107
ef7822c2
AV		 1108static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1109 unsigned cmd, unsigned long arg)
1da177e4
LT		 1110{
1111 IOCTL32_Command_struct __user *arg32 =
7c832835 1112 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1113 IOCTL_Command_struct arg64;
1114 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1115 int err;
1116 u32 cp;
1117
1118 err = 0;
7c832835
BH		 1119 err |=
1120 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1121 sizeof(arg64.LUN_info));
1122 err |=
1123 copy_from_user(&arg64.Request, &arg32->Request,
1124 sizeof(arg64.Request));
1125 err |=
1126 copy_from_user(&arg64.error_info, &arg32->error_info,
1127 sizeof(arg64.error_info));
1da177e4
LT		 1128 err |= get_user(arg64.buf_size, &arg32->buf_size);
1129 err |= get_user(cp, &arg32->buf);
1130 arg64.buf = compat_ptr(cp);
1131 err |= copy_to_user(p, &arg64, sizeof(arg64));
1132
1133 if (err)
1134 return -EFAULT;
1135
ef7822c2 1136 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1137 if (err)
1138 return err;
7c832835
BH		 1139 err |=
1140 copy_in_user(&arg32->error_info, &p->error_info,
1141 sizeof(arg32->error_info));
1da177e4
LT		 1142 if (err)
1143 return -EFAULT;
1144 return err;
1145}
1146
ef7822c2
AV		 1147static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1148 unsigned cmd, unsigned long arg)
1da177e4
LT		 1149{
1150 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1151 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1152 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1153 BIG_IOCTL_Command_struct __user *p =
1154 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1155 int err;
1156 u32 cp;
1157
1158 err = 0;
7c832835
BH		 1159 err |=
1160 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1161 sizeof(arg64.LUN_info));
1162 err |=
1163 copy_from_user(&arg64.Request, &arg32->Request,
1164 sizeof(arg64.Request));
1165 err |=
1166 copy_from_user(&arg64.error_info, &arg32->error_info,
1167 sizeof(arg64.error_info));
1da177e4
LT		 1168 err |= get_user(arg64.buf_size, &arg32->buf_size);
1169 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1170 err |= get_user(cp, &arg32->buf);
1171 arg64.buf = compat_ptr(cp);
1172 err |= copy_to_user(p, &arg64, sizeof(arg64));
1173
1174 if (err)
7c832835 1175 return -EFAULT;
1da177e4 1176
ef7822c2 1177 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1178 if (err)
1179 return err;
7c832835
BH		 1180 err |=
1181 copy_in_user(&arg32->error_info, &p->error_info,
1182 sizeof(arg32->error_info));
1da177e4
LT		 1183 if (err)
1184 return -EFAULT;
1185 return err;
1186}
1187#endif
a885c8c4
CH		 1188
1189static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1190{
1191 drive_info_struct *drv = get_drv(bdev->bd_disk);
1192
1193 if (!drv->cylinders)
1194 return -ENXIO;
1195
1196 geo->heads = drv->heads;
1197 geo->sectors = drv->sectors;
1198 geo->cylinders = drv->cylinders;
1199 return 0;
1200}
1201
0a9279cc
MM		 1202static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1203{
1204 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1205 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1206 (void)check_for_unit_attention(host, c);
1207}
1da177e4 1208/*
7c832835 1209 * ioctl
1da177e4 1210 */
ef7822c2 1211static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1212 unsigned int cmd, unsigned long arg)
1da177e4 1213{
1da177e4
LT		 1214 struct gendisk *disk = bdev->bd_disk;
1215 ctlr_info_t *host = get_host(disk);
1216 drive_info_struct *drv = get_drv(disk);
1217 int ctlr = host->ctlr;
1218 void __user *argp = (void __user *)arg;
1219
1220#ifdef CCISS_DEBUG
1221 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1222#endif /* CCISS_DEBUG */
1223
1224 switch (cmd) {
1da177e4 1225 case CCISS_GETPCIINFO:
7c832835
BH		 1226 {
1227 cciss_pci_info_struct pciinfo;
1228
1229 if (!arg)
1230 return -EINVAL;
1231 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1232 pciinfo.bus = host->pdev->bus->number;
1233 pciinfo.dev_fn = host->pdev->devfn;
1234 pciinfo.board_id = host->board_id;
1235 if (copy_to_user
1236 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1237 return -EFAULT;
1238 return 0;
1239 }
1da177e4 1240 case CCISS_GETINTINFO:
7c832835
BH		 1241 {
1242 cciss_coalint_struct intinfo;
1243 if (!arg)
1244 return -EINVAL;
1245 intinfo.delay =
1246 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1247 intinfo.count =
1248 readl(&host->cfgtable->HostWrite.CoalIntCount);
1249 if (copy_to_user
1250 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1251 return -EFAULT;
1252 return 0;
1253 }
1da177e4 1254 case CCISS_SETINTINFO:
1da177e4 1255 {
7c832835
BH		 1256 cciss_coalint_struct intinfo;
1257 unsigned long flags;
1258 int i;
1259
1260 if (!arg)
1261 return -EINVAL;
1262 if (!capable(CAP_SYS_ADMIN))
1263 return -EPERM;
1264 if (copy_from_user
1265 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1266 return -EFAULT;
1267 if ((intinfo.delay == 0) && (intinfo.count == 0))
1268 {
1269// printk("cciss_ioctl: delay and count cannot be 0\n");
1270 return -EINVAL;
1271 }
1272 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1273 /* Update the field, and then ring the doorbell */
1274 writel(intinfo.delay,
1275 &(host->cfgtable->HostWrite.CoalIntDelay));
1276 writel(intinfo.count,
1277 &(host->cfgtable->HostWrite.CoalIntCount));
1278 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1279
1280 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1281 if (!(readl(host->vaddr + SA5_DOORBELL)
1282 & CFGTBL_ChangeReq))
1283 break;
1284 /* delay and try again */
1285 udelay(1000);
1286 }
1287 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1288 if (i >= MAX_IOCTL_CONFIG_WAIT)
1289 return -EAGAIN;
1290 return 0;
1da177e4 1291 }
1da177e4 1292 case CCISS_GETNODENAME:
7c832835
BH		 1293 {
1294 NodeName_type NodeName;
1295 int i;
1296
1297 if (!arg)
1298 return -EINVAL;
1299 for (i = 0; i < 16; i++)
1300 NodeName[i] =
1301 readb(&host->cfgtable->ServerName[i]);
1302 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1303 return -EFAULT;
1304 return 0;
1305 }
1da177e4 1306 case CCISS_SETNODENAME:
7c832835
BH		 1307 {
1308 NodeName_type NodeName;
1309 unsigned long flags;
1310 int i;
1311
1312 if (!arg)
1313 return -EINVAL;
1314 if (!capable(CAP_SYS_ADMIN))
1315 return -EPERM;
1316
1317 if (copy_from_user
1318 (NodeName, argp, sizeof(NodeName_type)))
1319 return -EFAULT;
1320
1321 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1322
1323 /* Update the field, and then ring the doorbell */
1324 for (i = 0; i < 16; i++)
1325 writeb(NodeName[i],
1326 &host->cfgtable->ServerName[i]);
1327
1328 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1329
1330 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1331 if (!(readl(host->vaddr + SA5_DOORBELL)
1332 & CFGTBL_ChangeReq))
1333 break;
1334 /* delay and try again */
1335 udelay(1000);
1336 }
1337 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1338 if (i >= MAX_IOCTL_CONFIG_WAIT)
1339 return -EAGAIN;
1340 return 0;
1341 }
1da177e4
LT		 1342
1343 case CCISS_GETHEARTBEAT:
7c832835
BH		 1344 {
1345 Heartbeat_type heartbeat;
1346
1347 if (!arg)
1348 return -EINVAL;
1349 heartbeat = readl(&host->cfgtable->HeartBeat);
1350 if (copy_to_user
1351 (argp, &heartbeat, sizeof(Heartbeat_type)))
1352 return -EFAULT;
1353 return 0;
1354 }
1da177e4 1355 case CCISS_GETBUSTYPES:
7c832835
BH		 1356 {
1357 BusTypes_type BusTypes;
1358
1359 if (!arg)
1360 return -EINVAL;
1361 BusTypes = readl(&host->cfgtable->BusTypes);
1362 if (copy_to_user
1363 (argp, &BusTypes, sizeof(BusTypes_type)))
1364 return -EFAULT;
1365 return 0;
1366 }
1da177e4 1367 case CCISS_GETFIRMVER:
7c832835
BH		 1368 {
1369 FirmwareVer_type firmware;
1da177e4 1370
7c832835
BH		 1371 if (!arg)
1372 return -EINVAL;
1373 memcpy(firmware, host->firm_ver, 4);
1da177e4 1374
7c832835
BH		 1375 if (copy_to_user
1376 (argp, firmware, sizeof(FirmwareVer_type)))
1377 return -EFAULT;
1378 return 0;
1379 }
1380 case CCISS_GETDRIVVER:
1381 {
1382 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1383
7c832835
BH		 1384 if (!arg)
1385 return -EINVAL;
1da177e4 1386
7c832835
BH		 1387 if (copy_to_user
1388 (argp, &DriverVer, sizeof(DriverVer_type)))
1389 return -EFAULT;
1390 return 0;
1391 }
1da177e4 1392
6ae5ce8e
MM		 1393 case CCISS_DEREGDISK:
1394 case CCISS_REGNEWD:
1da177e4 1395 case CCISS_REVALIDVOLS:
2d11d993 1396 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1397
1398 case CCISS_GETLUNINFO:{
1399 LogvolInfo_struct luninfo;
1400
39ccf9a6
SC		 1401 memcpy(&luninfo.LunID, drv->LunID,
1402 sizeof(luninfo.LunID));
7c832835
BH		 1403 luninfo.num_opens = drv->usage_count;
1404 luninfo.num_parts = 0;
1405 if (copy_to_user(argp, &luninfo,
1406 sizeof(LogvolInfo_struct)))
1407 return -EFAULT;
1408 return 0;
1409 }
1da177e4 1410 case CCISS_PASSTHRU:
1da177e4 1411 {
7c832835
BH		 1412 IOCTL_Command_struct iocommand;
1413 CommandList_struct *c;
1414 char *buff = NULL;
1415 u64bit temp64;
6e9a4738 1416 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1417
7c832835
BH		 1418 if (!arg)
1419 return -EINVAL;
1da177e4 1420
7c832835
BH		 1421 if (!capable(CAP_SYS_RAWIO))
1422 return -EPERM;
1da177e4 1423
7c832835
BH		 1424 if (copy_from_user
1425 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1426 return -EFAULT;
1427 if ((iocommand.buf_size < 1) &&
1428 (iocommand.Request.Type.Direction != XFER_NONE)) {
1429 return -EINVAL;
1430 }
1431#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1432 /* Check kmalloc limits */
1433 if (iocommand.buf_size > 128000)
1434 return -EINVAL;
1435#endif
1436 if (iocommand.buf_size > 0) {
1437 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1438 if (buff == NULL)
1439 return -EFAULT;
1440 }
1441 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1442 /* Copy the data into the buffer we created */
1443 if (copy_from_user
1444 (buff, iocommand.buf, iocommand.buf_size)) {
1445 kfree(buff);
1446 return -EFAULT;
1447 }
1448 } else {
1449 memset(buff, 0, iocommand.buf_size);
1450 }
1451 if ((c = cmd_alloc(host, 0)) == NULL) {
1452 kfree(buff);
1453 return -ENOMEM;
1454 }
b028461d 1455 /* Fill in the command type */
7c832835 1456 c->cmd_type = CMD_IOCTL_PEND;
b028461d 1457 /* Fill in Command Header */
1458 c->Header.ReplyQueue = 0; /* unused in simple mode */
1459 if (iocommand.buf_size > 0) /* buffer to fill */
7c832835
BH		 1460 {
1461 c->Header.SGList = 1;
1462 c->Header.SGTotal = 1;
b028461d 1463 } else /* no buffers to fill */
7c832835
BH		 1464 {
1465 c->Header.SGList = 0;
1466 c->Header.SGTotal = 0;
1467 }
1468 c->Header.LUN = iocommand.LUN_info;
b028461d 1469 /* use the kernel address the cmd block for tag */
1470 c->Header.Tag.lower = c->busaddr;
1da177e4 1471
b028461d 1472 /* Fill in Request block */
7c832835 1473 c->Request = iocommand.Request;
1da177e4 1474
b028461d 1475 /* Fill in the scatter gather information */
7c832835
BH		 1476 if (iocommand.buf_size > 0) {
1477 temp64.val = pci_map_single(host->pdev, buff,
1478 iocommand.buf_size,
1479 PCI_DMA_BIDIRECTIONAL);
1480 c->SG[0].Addr.lower = temp64.val32.lower;
1481 c->SG[0].Addr.upper = temp64.val32.upper;
1482 c->SG[0].Len = iocommand.buf_size;
b028461d 1483 c->SG[0].Ext = 0; /* we are not chaining */
7c832835
BH		 1484 }
1485 c->waiting = &wait;
1486
664a717d 1487 enqueue_cmd_and_start_io(host, c);
7c832835
BH		 1488 wait_for_completion(&wait);
1489
1490 /* unlock the buffers from DMA */
1491 temp64.val32.lower = c->SG[0].Addr.lower;
1492 temp64.val32.upper = c->SG[0].Addr.upper;
1493 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1494 iocommand.buf_size,
1495 PCI_DMA_BIDIRECTIONAL);
1496
0a9279cc
MM		 1497 check_ioctl_unit_attention(host, c);
1498
7c832835
BH		 1499 /* Copy the error information out */
1500 iocommand.error_info = *(c->err_info);
1501 if (copy_to_user
1502 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1503 kfree(buff);
1da177e4
LT		 1504 cmd_free(host, c, 0);
1505 return -EFAULT;
1506 }
7c832835
BH		 1507
1508 if (iocommand.Request.Type.Direction == XFER_READ) {
1509 /* Copy the data out of the buffer we created */
1510 if (copy_to_user
1511 (iocommand.buf, buff, iocommand.buf_size)) {
1512 kfree(buff);
1513 cmd_free(host, c, 0);
1514 return -EFAULT;
1515 }
1516 }
1517 kfree(buff);
1518 cmd_free(host, c, 0);
1519 return 0;
1da177e4 1520 }
7c832835
BH		 1521 case CCISS_BIG_PASSTHRU:{
1522 BIG_IOCTL_Command_struct *ioc;
1523 CommandList_struct *c;
1524 unsigned char **buff = NULL;
1525 int *buff_size = NULL;
1526 u64bit temp64;
7c832835
BH		 1527 BYTE sg_used = 0;
1528 int status = 0;
1529 int i;
6e9a4738 1530 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1531 __u32 left;
1532 __u32 sz;
1533 BYTE __user *data_ptr;
1534
1535 if (!arg)
1536 return -EINVAL;
1537 if (!capable(CAP_SYS_RAWIO))
1538 return -EPERM;
1539 ioc = (BIG_IOCTL_Command_struct *)
1540 kmalloc(sizeof(*ioc), GFP_KERNEL);
1541 if (!ioc) {
1542 status = -ENOMEM;
1543 goto cleanup1;
1544 }
1545 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1546 status = -EFAULT;
1547 goto cleanup1;
1548 }
1549 if ((ioc->buf_size < 1) &&
1550 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1551 status = -EINVAL;
1552 goto cleanup1;
7c832835
BH		 1553 }
1554 /* Check kmalloc limits using all SGs */
1555 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1556 status = -EINVAL;
1557 goto cleanup1;
1558 }
1559 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1560 status = -EINVAL;
1561 goto cleanup1;
1562 }
1563 buff =
1564 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1565 if (!buff) {
1da177e4
LT		 1566 status = -ENOMEM;
1567 goto cleanup1;
1568 }
5cbded58 1569 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1570 GFP_KERNEL);
1571 if (!buff_size) {
1572 status = -ENOMEM;
1573 goto cleanup1;
1574 }
1575 left = ioc->buf_size;
1576 data_ptr = ioc->buf;
1577 while (left) {
1578 sz = (left >
1579 ioc->malloc_size) ? ioc->
1580 malloc_size : left;
1581 buff_size[sg_used] = sz;
1582 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1583 if (buff[sg_used] == NULL) {
1da177e4 1584 status = -ENOMEM;
15534d38
JA		 1585 goto cleanup1;
1586 }
7c832835
BH		 1587 if (ioc->Request.Type.Direction == XFER_WRITE) {
1588 if (copy_from_user
1589 (buff[sg_used], data_ptr, sz)) {
f7108f91 1590 status = -EFAULT;
7c832835
BH		 1591 goto cleanup1;
1592 }
1593 } else {
1594 memset(buff[sg_used], 0, sz);
1595 }
1596 left -= sz;
1597 data_ptr += sz;
1598 sg_used++;
1599 }
1600 if ((c = cmd_alloc(host, 0)) == NULL) {
1601 status = -ENOMEM;
1602 goto cleanup1;
1603 }
1604 c->cmd_type = CMD_IOCTL_PEND;
1605 c->Header.ReplyQueue = 0;
1606
1607 if (ioc->buf_size > 0) {
1608 c->Header.SGList = sg_used;
1609 c->Header.SGTotal = sg_used;
1da177e4 1610 } else {
7c832835
BH		 1611 c->Header.SGList = 0;
1612 c->Header.SGTotal = 0;
1da177e4 1613 }
7c832835
BH		 1614 c->Header.LUN = ioc->LUN_info;
1615 c->Header.Tag.lower = c->busaddr;
1616
1617 c->Request = ioc->Request;
1618 if (ioc->buf_size > 0) {
7c832835
BH		 1619 for (i = 0; i < sg_used; i++) {
1620 temp64.val =
1621 pci_map_single(host->pdev, buff[i],
1622 buff_size[i],
1623 PCI_DMA_BIDIRECTIONAL);
1624 c->SG[i].Addr.lower =
1625 temp64.val32.lower;
1626 c->SG[i].Addr.upper =
1627 temp64.val32.upper;
1628 c->SG[i].Len = buff_size[i];
1629 c->SG[i].Ext = 0; /* we are not chaining */
1630 }
1631 }
1632 c->waiting = &wait;
664a717d 1633 enqueue_cmd_and_start_io(host, c);
7c832835
BH		 1634 wait_for_completion(&wait);
1635 /* unlock the buffers from DMA */
1636 for (i = 0; i < sg_used; i++) {
1637 temp64.val32.lower = c->SG[i].Addr.lower;
1638 temp64.val32.upper = c->SG[i].Addr.upper;
1639 pci_unmap_single(host->pdev,
1640 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1641 PCI_DMA_BIDIRECTIONAL);
1da177e4 1642 }
0a9279cc 1643 check_ioctl_unit_attention(host, c);
7c832835
BH		 1644 /* Copy the error information out */
1645 ioc->error_info = *(c->err_info);
1646 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1647 cmd_free(host, c, 0);
1648 status = -EFAULT;
1649 goto cleanup1;
1650 }
1651 if (ioc->Request.Type.Direction == XFER_READ) {
1652 /* Copy the data out of the buffer we created */
1653 BYTE __user *ptr = ioc->buf;
1654 for (i = 0; i < sg_used; i++) {
1655 if (copy_to_user
1656 (ptr, buff[i], buff_size[i])) {
1657 cmd_free(host, c, 0);
1658 status = -EFAULT;
1659 goto cleanup1;
1660 }
1661 ptr += buff_size[i];
1da177e4 1662 }
1da177e4 1663 }
7c832835
BH		 1664 cmd_free(host, c, 0);
1665 status = 0;
1666 cleanup1:
1667 if (buff) {
1668 for (i = 0; i < sg_used; i++)
1669 kfree(buff[i]);
1670 kfree(buff);
1671 }
1672 kfree(buff_size);
1673 kfree(ioc);
1674 return status;
1da177e4 1675 }
03bbfee5
MMOD		 1676
1677 /* scsi_cmd_ioctl handles these, below, though some are not */
1678 /* very meaningful for cciss. SG_IO is the main one people want. */
1679
1680 case SG_GET_VERSION_NUM:
1681 case SG_SET_TIMEOUT:
1682 case SG_GET_TIMEOUT:
1683 case SG_GET_RESERVED_SIZE:
1684 case SG_SET_RESERVED_SIZE:
1685 case SG_EMULATED_HOST:
1686 case SG_IO:
1687 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1688 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1689
1690 /* scsi_cmd_ioctl would normally handle these, below, but */
1691 /* they aren't a good fit for cciss, as CD-ROMs are */
1692 /* not supported, and we don't have any bus/target/lun */
1693 /* which we present to the kernel. */
1694
1695 case CDROM_SEND_PACKET:
1696 case CDROMCLOSETRAY:
1697 case CDROMEJECT:
1698 case SCSI_IOCTL_GET_IDLUN:
1699 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1700 default:
1701 return -ENOTTY;
1702 }
1da177e4
LT		 1703}
1704
7b30f092
JA		 1705static void cciss_check_queues(ctlr_info_t *h)
1706{
1707 int start_queue = h->next_to_run;
1708 int i;
1709
1710 /* check to see if we have maxed out the number of commands that can
1711 * be placed on the queue. If so then exit. We do this check here
1712 * in case the interrupt we serviced was from an ioctl and did not
1713 * free any new commands.
1714 */
f880632f 1715 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1716 return;
1717
1718 /* We have room on the queue for more commands. Now we need to queue
1719 * them up. We will also keep track of the next queue to run so
1720 * that every queue gets a chance to be started first.
1721 */
1722 for (i = 0; i < h->highest_lun + 1; i++) {
1723 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1724 /* make sure the disk has been added and the drive is real
1725 * because this can be called from the middle of init_one.
1726 */
9cef0d2f
SC		 1727 if (!h->drv[curr_queue])
1728 continue;
1729 if (!(h->drv[curr_queue]->queue) ||
1730 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1731 continue;
1732 blk_start_queue(h->gendisk[curr_queue]->queue);
1733
1734 /* check to see if we have maxed out the number of commands
1735 * that can be placed on the queue.
1736 */
f880632f 1737 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1738 if (curr_queue == start_queue) {
1739 h->next_to_run =
1740 (start_queue + 1) % (h->highest_lun + 1);
1741 break;
1742 } else {
1743 h->next_to_run = curr_queue;
1744 break;
1745 }
7b30f092
JA		 1746 }
1747 }
1748}
1749
ca1e0484
MM		 1750static void cciss_softirq_done(struct request *rq)
1751{
1752 CommandList_struct *cmd = rq->completion_data;
1753 ctlr_info_t *h = hba[cmd->ctlr];
5c07a311 1754 SGDescriptor_struct *curr_sg = cmd->SG;
ca1e0484 1755 u64bit temp64;
664a717d 1756 unsigned long flags;
ca1e0484 1757 int i, ddir;
5c07a311 1758 int sg_index = 0;
ca1e0484
MM		 1759
1760 if (cmd->Request.Type.Direction == XFER_READ)
1761 ddir = PCI_DMA_FROMDEVICE;
1762 else
1763 ddir = PCI_DMA_TODEVICE;
1764
1765 /* command did not need to be retried */
1766 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1767 for (i = 0; i < cmd->Header.SGList; i++) {
5c07a311 1768 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
d45033ef 1769 cciss_unmap_sg_chain_block(h, cmd);
5c07a311 1770 /* Point to the next block */
dccc9b56 1771 curr_sg = h->cmd_sg_list[cmd->cmdindex];
5c07a311
DB		 1772 sg_index = 0;
1773 }
1774 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1775 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1776 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1777 ddir);
1778 ++sg_index;
ca1e0484
MM		 1779 }
1780
ca1e0484
MM		 1781#ifdef CCISS_DEBUG
1782 printk("Done with %p\n", rq);
7c832835 1783#endif /* CCISS_DEBUG */
ca1e0484 1784
c3a4d78c 1785 /* set the residual count for pc requests */
33659ebb 1786 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
c3a4d78c 1787 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1788
c3a4d78c 1789 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1790
ca1e0484 1791 spin_lock_irqsave(&h->lock, flags);
7c832835 1792 cmd_free(h, cmd, 1);
7b30f092 1793 cciss_check_queues(h);
ca1e0484
MM		 1794 spin_unlock_irqrestore(&h->lock, flags);
1795}
1796
39ccf9a6
SC		 1797static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1798 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1799{
9cef0d2f
SC		 1800 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1801 sizeof(h->drv[log_unit]->LunID));
b57695fe 1802}
1803
7fe06326
AP		 1804/* This function gets the SCSI vendor, model, and revision of a logical drive
1805 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1806 * they cannot be read.
1807 */
7b838bde 1808static void cciss_get_device_descr(int ctlr, int logvol,
7fe06326
AP		 1809 char *vendor, char *model, char *rev)
1810{
1811 int rc;
1812 InquiryData_struct *inq_buf;
b57695fe 1813 unsigned char scsi3addr[8];
7fe06326
AP		 1814
1815 *vendor = '\0';
1816 *model = '\0';
1817 *rev = '\0';
1818
1819 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1820 if (!inq_buf)
1821 return;
1822
b57695fe 1823 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1824 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1825 scsi3addr, TYPE_CMD);
7fe06326
AP		 1826 if (rc == IO_OK) {
1827 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1828 vendor[VENDOR_LEN] = '\0';
1829 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1830 model[MODEL_LEN] = '\0';
1831 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1832 rev[REV_LEN] = '\0';
1833 }
1834
1835 kfree(inq_buf);
1836 return;
1837}
1838
a72da29b
MM		 1839/* This function gets the serial number of a logical drive via
1840 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1841 * number cannot be had, for whatever reason, 16 bytes of 0xff
1842 * are returned instead.
1843 */
7b838bde 1844static void cciss_get_serial_no(int ctlr, int logvol,
a72da29b
MM		 1845 unsigned char *serial_no, int buflen)
1846{
1847#define PAGE_83_INQ_BYTES 64
1848 int rc;
1849 unsigned char *buf;
b57695fe 1850 unsigned char scsi3addr[8];
a72da29b
MM		 1851
1852 if (buflen > 16)
1853 buflen = 16;
1854 memset(serial_no, 0xff, buflen);
1855 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1856 if (!buf)
1857 return;
1858 memset(serial_no, 0, buflen);
b57695fe 1859 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1860 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1861 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1862 if (rc == IO_OK)
1863 memcpy(serial_no, &buf[8], buflen);
1864 kfree(buf);
1865 return;
1866}
1867
617e1344
SC		 1868/*
1869 * cciss_add_disk sets up the block device queue for a logical drive
1870 */
1871static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1872 int drv_index)
1873{
1874 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1875 if (!disk->queue)
1876 goto init_queue_failure;
6ae5ce8e
MM		 1877 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1878 disk->major = h->major;
1879 disk->first_minor = drv_index << NWD_SHIFT;
1880 disk->fops = &cciss_fops;
9cef0d2f
SC		 1881 if (cciss_create_ld_sysfs_entry(h, drv_index))
1882 goto cleanup_queue;
1883 disk->private_data = h->drv[drv_index];
1884 disk->driverfs_dev = &h->drv[drv_index]->dev;
6ae5ce8e
MM		 1885
1886 /* Set up queue information */
1887 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1888
1889 /* This is a hardware imposed limit. */
8a78362c 1890 blk_queue_max_segments(disk->queue, h->maxsgentries);
6ae5ce8e 1891
086fa5ff 1892 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
6ae5ce8e
MM		 1893
1894 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1895
1896 disk->queue->queuedata = h;
1897
e1defc4f 1898 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1899 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1900
1901 /* Make sure all queue data is written out before */
9cef0d2f 1902 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1903 /* allows the interrupt handler to start the queue */
1904 wmb();
9cef0d2f 1905 h->drv[drv_index]->queue = disk->queue;
6ae5ce8e 1906 add_disk(disk);
617e1344
SC		 1907 return 0;
1908
1909cleanup_queue:
1910 blk_cleanup_queue(disk->queue);
1911 disk->queue = NULL;
e8074f79 1912init_queue_failure:
617e1344 1913 return -1;
6ae5ce8e
MM		 1914}
1915
ddd47442 1916/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1917 * If the usage_count is zero and it is a heretofore unknown drive, or,
1918 * the drive's capacity, geometry, or serial number has changed,
1919 * then the drive information will be updated and the disk will be
1920 * re-registered with the kernel. If these conditions don't hold,
1921 * then it will be left alone for the next reboot. The exception to this
1922 * is disk 0 which will always be left registered with the kernel since it
1923 * is also the controller node. Any changes to disk 0 will show up on
1924 * the next reboot.
7c832835 1925 */
2d11d993
SC		 1926static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1927 int via_ioctl)
7c832835 1928{
ddd47442
MM		 1929 ctlr_info_t *h = hba[ctlr];
1930 struct gendisk *disk;
ddd47442
MM		 1931 InquiryData_struct *inq_buff = NULL;
1932 unsigned int block_size;
00988a35 1933 sector_t total_size;
ddd47442
MM		 1934 unsigned long flags = 0;
1935 int ret = 0;
a72da29b
MM		 1936 drive_info_struct *drvinfo;
1937
1938 /* Get information about the disk and modify the driver structure */
1939 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1940 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 1941 if (inq_buff == NULL || drvinfo == NULL)
1942 goto mem_msg;
1943
1944 /* testing to see if 16-byte CDBs are already being used */
1945 if (h->cciss_read == CCISS_READ_16) {
7b838bde 1946 cciss_read_capacity_16(h->ctlr, drv_index,
a72da29b
MM		 1947 &total_size, &block_size);
1948
1949 } else {
7b838bde 1950 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
a72da29b
MM		 1951 /* if read_capacity returns all F's this volume is >2TB */
1952 /* in size so we switch to 16-byte CDB's for all */
1953 /* read/write ops */
1954 if (total_size == 0xFFFFFFFFULL) {
7b838bde 1955 cciss_read_capacity_16(ctlr, drv_index,
a72da29b
MM		 1956 &total_size, &block_size);
1957 h->cciss_read = CCISS_READ_16;
1958 h->cciss_write = CCISS_WRITE_16;
1959 } else {
1960 h->cciss_read = CCISS_READ_10;
1961 h->cciss_write = CCISS_WRITE_10;
1962 }
1963 }
1964
7b838bde 1965 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
a72da29b
MM		 1966 inq_buff, drvinfo);
1967 drvinfo->block_size = block_size;
1968 drvinfo->nr_blocks = total_size + 1;
1969
7b838bde 1970 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
7fe06326 1971 drvinfo->model, drvinfo->rev);
7b838bde 1972 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
a72da29b 1973 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 1974 /* Save the lunid in case we deregister the disk, below. */
1975 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1976 sizeof(drvinfo->LunID));
a72da29b
MM		 1977
1978 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 1979 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 1980 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 1981 h->drv[drv_index]->serial_no, 16) == 0) &&
1982 drvinfo->block_size == h->drv[drv_index]->block_size &&
1983 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1984 drvinfo->heads == h->drv[drv_index]->heads &&
1985 drvinfo->sectors == h->drv[drv_index]->sectors &&
1986 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 1987 /* The disk is unchanged, nothing to update */
1988 goto freeret;
a72da29b 1989
6ae5ce8e
MM		 1990 /* If we get here it's not the same disk, or something's changed,
1991 * so we need to * deregister it, and re-register it, if it's not
1992 * in use.
1993 * If the disk already exists then deregister it before proceeding
1994 * (unless it's the first disk (for the controller node).
1995 */
9cef0d2f 1996 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 1997 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442 1998 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 1999 h->drv[drv_index]->busy_configuring = 1;
ddd47442 2000 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 2001
9cef0d2f 2002 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 2003 * which keeps the interrupt handler from starting
2004 * the queue.
2005 */
2d11d993 2006 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 2007 }
2008
2009 /* If the disk is in use return */
2010 if (ret)
a72da29b
MM		 2011 goto freeret;
2012
6ae5ce8e 2013 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 2014 * and serial number inquiry. If the disk was deregistered
2015 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 2016 */
9cef0d2f
SC		 2017 if (h->drv[drv_index] == NULL) {
2018 drvinfo->device_initialized = 0;
2019 h->drv[drv_index] = drvinfo;
2020 drvinfo = NULL; /* so it won't be freed below. */
2021 } else {
2022 /* special case for cxd0 */
2023 h->drv[drv_index]->block_size = drvinfo->block_size;
2024 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2025 h->drv[drv_index]->heads = drvinfo->heads;
2026 h->drv[drv_index]->sectors = drvinfo->sectors;
2027 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2028 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2029 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2030 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2031 VENDOR_LEN + 1);
2032 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2033 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2034 }
ddd47442
MM		 2035
2036 ++h->num_luns;
2037 disk = h->gendisk[drv_index];
9cef0d2f 2038 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 2039
6ae5ce8e
MM		 2040 /* If it's not disk 0 (drv_index != 0)
2041 * or if it was disk 0, but there was previously
2042 * no actual corresponding configured logical drive
2043 * (raid_leve == -1) then we want to update the
2044 * logical drive's information.
2045 */
361e9b07
SC		 2046 if (drv_index || first_time) {
2047 if (cciss_add_disk(h, disk, drv_index) != 0) {
2048 cciss_free_gendisk(h, drv_index);
9cef0d2f 2049 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2050 printk(KERN_WARNING "cciss:%d could not update "
2051 "disk %d\n", h->ctlr, drv_index);
2052 --h->num_luns;
2053 }
2054 }
ddd47442 2055
6ae5ce8e 2056freeret:
ddd47442 2057 kfree(inq_buff);
a72da29b 2058 kfree(drvinfo);
ddd47442 2059 return;
6ae5ce8e 2060mem_msg:
ddd47442
MM		 2061 printk(KERN_ERR "cciss: out of memory\n");
2062 goto freeret;
2063}
2064
2065/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 2066 * that has a null drv pointer and allocate the drive info struct and
2067 * will return that index This is where new drives will be added.
2068 * If the index to be returned is greater than the highest_lun index for
2069 * the controller then highest_lun is set * to this new index.
2070 * If there are no available indexes or if tha allocation fails, then -1
2071 * is returned. * "controller_node" is used to know if this is a real
2072 * logical drive, or just the controller node, which determines if this
2073 * counts towards highest_lun.
7c832835 2074 */
9cef0d2f 2075static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 2076{
2077 int i;
9cef0d2f 2078 drive_info_struct *drv;
ddd47442 2079
9cef0d2f 2080 /* Search for an empty slot for our drive info */
7c832835 2081 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 2082
2083 /* if not cxd0 case, and it's occupied, skip it. */
2084 if (h->drv[i] && i != 0)
2085 continue;
2086 /*
2087 * If it's cxd0 case, and drv is alloc'ed already, and a
2088 * disk is configured there, skip it.
2089 */
2090 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2091 continue;
2092
2093 /*
2094 * We've found an empty slot. Update highest_lun
2095 * provided this isn't just the fake cxd0 controller node.
2096 */
2097 if (i > h->highest_lun && !controller_node)
2098 h->highest_lun = i;
2099
2100 /* If adding a real disk at cxd0, and it's already alloc'ed */
2101 if (i == 0 && h->drv[i] != NULL)
ddd47442 2102 return i;
9cef0d2f
SC		 2103
2104 /*
2105 * Found an empty slot, not already alloc'ed. Allocate it.
2106 * Mark it with raid_level == -1, so we know it's new later on.
2107 */
2108 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2109 if (!drv)
2110 return -1;
2111 drv->raid_level = -1; /* so we know it's new */
2112 h->drv[i] = drv;
2113 return i;
ddd47442
MM		 2114 }
2115 return -1;
2116}
2117
9cef0d2f
SC		 2118static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2119{
2120 kfree(h->drv[drv_index]);
2121 h->drv[drv_index] = NULL;
2122}
2123
361e9b07
SC		 2124static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2125{
2126 put_disk(h->gendisk[drv_index]);
2127 h->gendisk[drv_index] = NULL;
2128}
2129
6ae5ce8e
MM		 2130/* cciss_add_gendisk finds a free hba[]->drv structure
2131 * and allocates a gendisk if needed, and sets the lunid
2132 * in the drvinfo structure. It returns the index into
2133 * the ->drv[] array, or -1 if none are free.
2134 * is_controller_node indicates whether highest_lun should
2135 * count this disk, or if it's only being added to provide
2136 * a means to talk to the controller in case no logical
2137 * drives have yet been configured.
2138 */
39ccf9a6
SC		 2139static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2140 int controller_node)
6ae5ce8e
MM		 2141{
2142 int drv_index;
2143
9cef0d2f 2144 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2145 if (drv_index == -1)
2146 return -1;
8ce51966 2147
6ae5ce8e
MM		 2148 /*Check if the gendisk needs to be allocated */
2149 if (!h->gendisk[drv_index]) {
2150 h->gendisk[drv_index] =
2151 alloc_disk(1 << NWD_SHIFT);
2152 if (!h->gendisk[drv_index]) {
2153 printk(KERN_ERR "cciss%d: could not "
2154 "allocate a new disk %d\n",
2155 h->ctlr, drv_index);
9cef0d2f 2156 goto err_free_drive_info;
6ae5ce8e
MM		 2157 }
2158 }
9cef0d2f
SC		 2159 memcpy(h->drv[drv_index]->LunID, lunid,
2160 sizeof(h->drv[drv_index]->LunID));
2161 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2162 goto err_free_disk;
6ae5ce8e
MM		 2163 /* Don't need to mark this busy because nobody */
2164 /* else knows about this disk yet to contend */
2165 /* for access to it. */
9cef0d2f 2166 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2167 wmb();
2168 return drv_index;
7fe06326
AP		 2169
2170err_free_disk:
361e9b07 2171 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2172err_free_drive_info:
2173 cciss_free_drive_info(h, drv_index);
7fe06326 2174 return -1;
6ae5ce8e
MM		 2175}
2176
2177/* This is for the special case of a controller which
2178 * has no logical drives. In this case, we still need
2179 * to register a disk so the controller can be accessed
2180 * by the Array Config Utility.
2181 */
2182static void cciss_add_controller_node(ctlr_info_t *h)
2183{
2184 struct gendisk *disk;
2185 int drv_index;
2186
2187 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2188 return;
2189
39ccf9a6 2190 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2191 if (drv_index == -1)
2192 goto error;
9cef0d2f
SC		 2193 h->drv[drv_index]->block_size = 512;
2194 h->drv[drv_index]->nr_blocks = 0;
2195 h->drv[drv_index]->heads = 0;
2196 h->drv[drv_index]->sectors = 0;
2197 h->drv[drv_index]->cylinders = 0;
2198 h->drv[drv_index]->raid_level = -1;
2199 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2200 disk = h->gendisk[drv_index];
361e9b07
SC		 2201 if (cciss_add_disk(h, disk, drv_index) == 0)
2202 return;
2203 cciss_free_gendisk(h, drv_index);
9cef0d2f 2204 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2205error:
2206 printk(KERN_WARNING "cciss%d: could not "
2207 "add disk 0.\n", h->ctlr);
2208 return;
6ae5ce8e
MM		 2209}
2210
ddd47442 2211/* This function will add and remove logical drives from the Logical
d14c4ab5 2212 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2213 * so that mount points are preserved until the next reboot. This allows
2214 * for the removal of logical drives in the middle of the drive array
2215 * without a re-ordering of those drives.
2216 * INPUT
2217 * h = The controller to perform the operations on
7c832835 2218 */
2d11d993
SC		 2219static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2220 int via_ioctl)
1da177e4 2221{
ddd47442
MM		 2222 int ctlr = h->ctlr;
2223 int num_luns;
2224 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2225 int return_code;
2226 int listlength = 0;
2227 int i;
2228 int drv_found;
2229 int drv_index = 0;
39ccf9a6 2230 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2231 unsigned long flags;
ddd47442 2232
6ae5ce8e
MM		 2233 if (!capable(CAP_SYS_RAWIO))
2234 return -EPERM;
2235
ddd47442
MM		 2236 /* Set busy_configuring flag for this operation */
2237 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2238 if (h->busy_configuring) {
ddd47442
MM		 2239 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2240 return -EBUSY;
2241 }
2242 h->busy_configuring = 1;
a72da29b 2243 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2244
a72da29b
MM		 2245 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2246 if (ld_buff == NULL)
2247 goto mem_msg;
2248
2249 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2250 sizeof(ReportLunData_struct),
2251 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2252
a72da29b
MM		 2253 if (return_code == IO_OK)
2254 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2255 else { /* reading number of logical volumes failed */
2256 printk(KERN_WARNING "cciss: report logical volume"
2257 " command failed\n");
2258 listlength = 0;
2259 goto freeret;
2260 }
2261
2262 num_luns = listlength / 8; /* 8 bytes per entry */
2263 if (num_luns > CISS_MAX_LUN) {
2264 num_luns = CISS_MAX_LUN;
2265 printk(KERN_WARNING "cciss: more luns configured"
2266 " on controller than can be handled by"
2267 " this driver.\n");
2268 }
2269
6ae5ce8e
MM		 2270 if (num_luns == 0)
2271 cciss_add_controller_node(h);
2272
2273 /* Compare controller drive array to driver's drive array
2274 * to see if any drives are missing on the controller due
2275 * to action of Array Config Utility (user deletes drive)
2276 * and deregister logical drives which have disappeared.
2277 */
a72da29b
MM		 2278 for (i = 0; i <= h->highest_lun; i++) {
2279 int j;
2280 drv_found = 0;
d8a0be6a
SC		 2281
2282 /* skip holes in the array from already deleted drives */
9cef0d2f 2283 if (h->drv[i] == NULL)
d8a0be6a
SC		 2284 continue;
2285
a72da29b 2286 for (j = 0; j < num_luns; j++) {
39ccf9a6 2287 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2288 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2289 sizeof(lunid)) == 0) {
a72da29b
MM		 2290 drv_found = 1;
2291 break;
2292 }
2293 }
2294 if (!drv_found) {
2295 /* Deregister it from the OS, it's gone. */
2296 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2297 h->drv[i]->busy_configuring = 1;
a72da29b 2298 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2299 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2300 if (h->drv[i] != NULL)
2301 h->drv[i]->busy_configuring = 0;
ddd47442 2302 }
a72da29b 2303 }
ddd47442 2304
a72da29b
MM		 2305 /* Compare controller drive array to driver's drive array.
2306 * Check for updates in the drive information and any new drives
2307 * on the controller due to ACU adding logical drives, or changing
2308 * a logical drive's size, etc. Reregister any new/changed drives
2309 */
2310 for (i = 0; i < num_luns; i++) {
2311 int j;
ddd47442 2312
a72da29b 2313 drv_found = 0;
ddd47442 2314
39ccf9a6 2315 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2316 /* Find if the LUN is already in the drive array
2317 * of the driver. If so then update its info
2318 * if not in use. If it does not exist then find
2319 * the first free index and add it.
2320 */
2321 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2322 if (h->drv[j] != NULL &&
2323 memcmp(h->drv[j]->LunID, lunid,
2324 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2325 drv_index = j;
2326 drv_found = 1;
2327 break;
ddd47442 2328 }
a72da29b 2329 }
ddd47442 2330
a72da29b
MM		 2331 /* check if the drive was found already in the array */
2332 if (!drv_found) {
eece695f 2333 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2334 if (drv_index == -1)
2335 goto freeret;
a72da29b 2336 }
2d11d993
SC		 2337 cciss_update_drive_info(ctlr, drv_index, first_time,
2338 via_ioctl);
a72da29b 2339 } /* end for */
ddd47442 2340
6ae5ce8e 2341freeret:
ddd47442
MM		 2342 kfree(ld_buff);
2343 h->busy_configuring = 0;
2344 /* We return -1 here to tell the ACU that we have registered/updated
2345 * all of the drives that we can and to keep it from calling us
2346 * additional times.
7c832835 2347 */
ddd47442 2348 return -1;
6ae5ce8e 2349mem_msg:
ddd47442 2350 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2351 h->busy_configuring = 0;
ddd47442
MM		 2352 goto freeret;
2353}
2354
9ddb27b4
SC		 2355static void cciss_clear_drive_info(drive_info_struct *drive_info)
2356{
2357 /* zero out the disk size info */
2358 drive_info->nr_blocks = 0;
2359 drive_info->block_size = 0;
2360 drive_info->heads = 0;
2361 drive_info->sectors = 0;
2362 drive_info->cylinders = 0;
2363 drive_info->raid_level = -1;
2364 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2365 memset(drive_info->model, 0, sizeof(drive_info->model));
2366 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2367 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2368 /*
2369 * don't clear the LUNID though, we need to remember which
2370 * one this one is.
2371 */
2372}
2373
ddd47442
MM		 2374/* This function will deregister the disk and it's queue from the
2375 * kernel. It must be called with the controller lock held and the
2376 * drv structures busy_configuring flag set. It's parameters are:
2377 *
2378 * disk = This is the disk to be deregistered
2379 * drv = This is the drive_info_struct associated with the disk to be
2380 * deregistered. It contains information about the disk used
2381 * by the driver.
2382 * clear_all = This flag determines whether or not the disk information
2383 * is going to be completely cleared out and the highest_lun
2384 * reset. Sometimes we want to clear out information about
d14c4ab5 2385 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2386 * the highest_lun should be left unchanged and the LunID
2387 * should not be cleared.
2d11d993
SC		 2388 * via_ioctl
2389 * This indicates whether we've reached this path via ioctl.
2390 * This affects the maximum usage count allowed for c0d0 to be messed with.
2391 * If this path is reached via ioctl(), then the max_usage_count will
2392 * be 1, as the process calling ioctl() has got to have the device open.
2393 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2394*/
a0ea8622 2395static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2396 int clear_all, int via_ioctl)
ddd47442 2397{
799202cb 2398 int i;
a0ea8622
SC		 2399 struct gendisk *disk;
2400 drive_info_struct *drv;
9cef0d2f 2401 int recalculate_highest_lun;
1da177e4
LT		 2402
2403 if (!capable(CAP_SYS_RAWIO))
2404 return -EPERM;
2405
9cef0d2f 2406 drv = h->drv[drv_index];
a0ea8622
SC		 2407 disk = h->gendisk[drv_index];
2408
1da177e4 2409 /* make sure logical volume is NOT is use */
7c832835 2410 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2411 if (drv->usage_count > via_ioctl)
7c832835
BH		 2412 return -EBUSY;
2413 } else if (drv->usage_count > 0)
2414 return -EBUSY;
1da177e4 2415
9cef0d2f
SC		 2416 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2417
ddd47442
MM		 2418 /* invalidate the devices and deregister the disk. If it is disk
2419 * zero do not deregister it but just zero out it's values. This
2420 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2421 */
2422 if (h->gendisk[0] != disk) {
5a9df732 2423 struct request_queue *q = disk->queue;
097d0264 2424 if (disk->flags & GENHD_FL_UP) {
8ce51966 2425 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2426 del_gendisk(disk);
5a9df732 2427 }
9cef0d2f 2428 if (q)
5a9df732 2429 blk_cleanup_queue(q);
5a9df732
AB		 2430 /* If clear_all is set then we are deleting the logical
2431 * drive, not just refreshing its info. For drives
2432 * other than disk 0 we will call put_disk. We do not
2433 * do this for disk 0 as we need it to be able to
2434 * configure the controller.
a72da29b 2435 */
5a9df732
AB		 2436 if (clear_all){
2437 /* This isn't pretty, but we need to find the
2438 * disk in our array and NULL our the pointer.
2439 * This is so that we will call alloc_disk if
2440 * this index is used again later.
a72da29b 2441 */
5a9df732 2442 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2443 if (h->gendisk[i] == disk) {
5a9df732
AB		 2444 h->gendisk[i] = NULL;
2445 break;
799202cb 2446 }
799202cb 2447 }
5a9df732 2448 put_disk(disk);
ddd47442 2449 }
799202cb
MM		 2450 } else {
2451 set_capacity(disk, 0);
9cef0d2f 2452 cciss_clear_drive_info(drv);
ddd47442
MM		 2453 }
2454
2455 --h->num_luns;
ddd47442 2456
9cef0d2f
SC		 2457 /* if it was the last disk, find the new hightest lun */
2458 if (clear_all && recalculate_highest_lun) {
c2d45b4d 2459 int newhighest = -1;
9cef0d2f
SC		 2460 for (i = 0; i <= h->highest_lun; i++) {
2461 /* if the disk has size > 0, it is available */
2462 if (h->drv[i] && h->drv[i]->heads)
2463 newhighest = i;
1da177e4 2464 }
9cef0d2f 2465 h->highest_lun = newhighest;
ddd47442 2466 }
e2019b58 2467 return 0;
1da177e4 2468}
ddd47442 2469
b57695fe 2470static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2471 size_t size, __u8 page_code, unsigned char *scsi3addr,
2472 int cmd_type)
1da177e4 2473{
7c832835 2474 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2475 u64bit buff_dma_handle;
2476 int status = IO_OK;
2477
2478 c->cmd_type = CMD_IOCTL_PEND;
2479 c->Header.ReplyQueue = 0;
7c832835 2480 if (buff != NULL) {
1da177e4 2481 c->Header.SGList = 1;
7c832835 2482 c->Header.SGTotal = 1;
1da177e4
LT		 2483 } else {
2484 c->Header.SGList = 0;
7c832835 2485 c->Header.SGTotal = 0;
1da177e4
LT		 2486 }
2487 c->Header.Tag.lower = c->busaddr;
b57695fe 2488 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2489
2490 c->Request.Type.Type = cmd_type;
2491 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2492 switch (cmd) {
2493 case CISS_INQUIRY:
1da177e4 2494 /* are we trying to read a vital product page */
7c832835 2495 if (page_code != 0) {
1da177e4
LT		 2496 c->Request.CDB[1] = 0x01;
2497 c->Request.CDB[2] = page_code;
2498 }
2499 c->Request.CDBLen = 6;
7c832835 2500 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2501 c->Request.Type.Direction = XFER_READ;
2502 c->Request.Timeout = 0;
7c832835
BH		 2503 c->Request.CDB[0] = CISS_INQUIRY;
2504 c->Request.CDB[4] = size & 0xFF;
2505 break;
1da177e4
LT		 2506 case CISS_REPORT_LOG:
2507 case CISS_REPORT_PHYS:
7c832835 2508 /* Talking to controller so It's a physical command
1da177e4 2509 mode = 00 target = 0. Nothing to write.
7c832835 2510 */
1da177e4
LT		 2511 c->Request.CDBLen = 12;
2512 c->Request.Type.Attribute = ATTR_SIMPLE;
2513 c->Request.Type.Direction = XFER_READ;
2514 c->Request.Timeout = 0;
2515 c->Request.CDB[0] = cmd;
b028461d 2516 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
1da177e4
LT		 2517 c->Request.CDB[7] = (size >> 16) & 0xFF;
2518 c->Request.CDB[8] = (size >> 8) & 0xFF;
2519 c->Request.CDB[9] = size & 0xFF;
2520 break;
2521
2522 case CCISS_READ_CAPACITY:
1da177e4
LT		 2523 c->Request.CDBLen = 10;
2524 c->Request.Type.Attribute = ATTR_SIMPLE;
2525 c->Request.Type.Direction = XFER_READ;
2526 c->Request.Timeout = 0;
2527 c->Request.CDB[0] = cmd;
7c832835 2528 break;
00988a35 2529 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2530 c->Request.CDBLen = 16;
2531 c->Request.Type.Attribute = ATTR_SIMPLE;
2532 c->Request.Type.Direction = XFER_READ;
2533 c->Request.Timeout = 0;
2534 c->Request.CDB[0] = cmd;
2535 c->Request.CDB[1] = 0x10;
2536 c->Request.CDB[10] = (size >> 24) & 0xFF;
2537 c->Request.CDB[11] = (size >> 16) & 0xFF;
2538 c->Request.CDB[12] = (size >> 8) & 0xFF;
2539 c->Request.CDB[13] = size & 0xFF;
2540 c->Request.Timeout = 0;
2541 c->Request.CDB[0] = cmd;
2542 break;
1da177e4
LT		 2543 case CCISS_CACHE_FLUSH:
2544 c->Request.CDBLen = 12;
2545 c->Request.Type.Attribute = ATTR_SIMPLE;
2546 c->Request.Type.Direction = XFER_WRITE;
2547 c->Request.Timeout = 0;
2548 c->Request.CDB[0] = BMIC_WRITE;
2549 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2550 break;
88f627ae 2551 case TEST_UNIT_READY:
88f627ae
SC		 2552 c->Request.CDBLen = 6;
2553 c->Request.Type.Attribute = ATTR_SIMPLE;
2554 c->Request.Type.Direction = XFER_NONE;
2555 c->Request.Timeout = 0;
2556 break;
1da177e4
LT		 2557 default:
2558 printk(KERN_WARNING
7c832835 2559 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2560 return IO_ERROR;
1da177e4
LT		 2561 }
2562 } else if (cmd_type == TYPE_MSG) {
2563 switch (cmd) {
7c832835 2564 case 0: /* ABORT message */
3da8b713 2565 c->Request.CDBLen = 12;
2566 c->Request.Type.Attribute = ATTR_SIMPLE;
2567 c->Request.Type.Direction = XFER_WRITE;
2568 c->Request.Timeout = 0;
7c832835
BH		 2569 c->Request.CDB[0] = cmd; /* abort */
2570 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2571 /* buff contains the tag of the command to abort */
2572 memcpy(&c->Request.CDB[4], buff, 8);
2573 break;
7c832835 2574 case 1: /* RESET message */
88f627ae 2575 c->Request.CDBLen = 16;
3da8b713 2576 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2577 c->Request.Type.Direction = XFER_NONE;
3da8b713 2578 c->Request.Timeout = 0;
2579 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2580 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2581 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2582 break;
1da177e4
LT		 2583 case 3: /* No-Op message */
2584 c->Request.CDBLen = 1;
2585 c->Request.Type.Attribute = ATTR_SIMPLE;
2586 c->Request.Type.Direction = XFER_WRITE;
2587 c->Request.Timeout = 0;
2588 c->Request.CDB[0] = cmd;
2589 break;
2590 default:
2591 printk(KERN_WARNING
7c832835 2592 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2593 return IO_ERROR;
2594 }
2595 } else {
2596 printk(KERN_WARNING
7c832835 2597 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2598 return IO_ERROR;
2599 }
2600 /* Fill in the scatter gather information */
2601 if (size > 0) {
2602 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2603 buff, size,
2604 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2605 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2606 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2607 c->SG[0].Len = size;
7c832835 2608 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2609 }
2610 return status;
2611}
7c832835 2612
3c2ab402 2613static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2614{
2615 switch (c->err_info->ScsiStatus) {
2616 case SAM_STAT_GOOD:
2617 return IO_OK;
2618 case SAM_STAT_CHECK_CONDITION:
2619 switch (0xf & c->err_info->SenseInfo[2]) {
2620 case 0: return IO_OK; /* no sense */
2621 case 1: return IO_OK; /* recovered error */
2622 default:
c08fac65
SC		 2623 if (check_for_unit_attention(h, c))
2624 return IO_NEEDS_RETRY;
3c2ab402 2625 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2626 "check condition, sense key = 0x%02x\n",
2627 h->ctlr, c->Request.CDB[0],
2628 c->err_info->SenseInfo[2]);
2629 }
2630 break;
2631 default:
2632 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2633 "scsi status = 0x%02x\n", h->ctlr,
2634 c->Request.CDB[0], c->err_info->ScsiStatus);
2635 break;
2636 }
2637 return IO_ERROR;
2638}
2639
789a424a 2640static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2641{
5390cfc3 2642 int return_status = IO_OK;
7c832835 2643
789a424a 2644 if (c->err_info->CommandStatus == CMD_SUCCESS)
2645 return IO_OK;
5390cfc3 2646
2647 switch (c->err_info->CommandStatus) {
2648 case CMD_TARGET_STATUS:
3c2ab402 2649 return_status = check_target_status(h, c);
5390cfc3 2650 break;
2651 case CMD_DATA_UNDERRUN:
2652 case CMD_DATA_OVERRUN:
2653 /* expected for inquiry and report lun commands */
2654 break;
2655 case CMD_INVALID:
789a424a 2656 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2657 "reported invalid\n", c->Request.CDB[0]);
2658 return_status = IO_ERROR;
2659 break;
2660 case CMD_PROTOCOL_ERR:
2661 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2662 "protocol error \n", c->Request.CDB[0]);
2663 return_status = IO_ERROR;
2664 break;
2665 case CMD_HARDWARE_ERR:
2666 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2667 " hardware error\n", c->Request.CDB[0]);
2668 return_status = IO_ERROR;
2669 break;
2670 case CMD_CONNECTION_LOST:
2671 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2672 "connection lost\n", c->Request.CDB[0]);
2673 return_status = IO_ERROR;
2674 break;
2675 case CMD_ABORTED:
2676 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2677 "aborted\n", c->Request.CDB[0]);
2678 return_status = IO_ERROR;
2679 break;
2680 case CMD_ABORT_FAILED:
2681 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2682 "abort failed\n", c->Request.CDB[0]);
2683 return_status = IO_ERROR;
2684 break;
2685 case CMD_UNSOLICITED_ABORT:
2686 printk(KERN_WARNING
2687 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2688 c->Request.CDB[0]);
789a424a 2689 return_status = IO_NEEDS_RETRY;
5390cfc3 2690 break;
2691 default:
2692 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2693 "unknown status %x\n", c->Request.CDB[0],
2694 c->err_info->CommandStatus);
2695 return_status = IO_ERROR;
7c832835 2696 }
789a424a 2697 return return_status;
2698}
2699
2700static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2701 int attempt_retry)
2702{
2703 DECLARE_COMPLETION_ONSTACK(wait);
2704 u64bit buff_dma_handle;
789a424a 2705 int return_status = IO_OK;
2706
2707resend_cmd2:
2708 c->waiting = &wait;
664a717d 2709 enqueue_cmd_and_start_io(h, c);
789a424a 2710
2711 wait_for_completion(&wait);
2712
2713 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2714 goto command_done;
2715
2716 return_status = process_sendcmd_error(h, c);
2717
2718 if (return_status == IO_NEEDS_RETRY &&
2719 c->retry_count < MAX_CMD_RETRIES) {
2720 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2721 c->Request.CDB[0]);
2722 c->retry_count++;
2723 /* erase the old error information */
2724 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2725 return_status = IO_OK;
2726 INIT_COMPLETION(wait);
2727 goto resend_cmd2;
2728 }
5390cfc3 2729
2730command_done:
1da177e4 2731 /* unlock the buffers from DMA */
bb2a37bf
MM		 2732 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2733 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2734 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2735 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2736 return return_status;
2737}
2738
b57695fe 2739static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2740 __u8 page_code, unsigned char scsi3addr[],
2741 int cmd_type)
5390cfc3 2742{
2743 ctlr_info_t *h = hba[ctlr];
2744 CommandList_struct *c;
2745 int return_status;
2746
2747 c = cmd_alloc(h, 0);
2748 if (!c)
2749 return -ENOMEM;
b57695fe 2750 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2751 scsi3addr, cmd_type);
5390cfc3 2752 if (return_status == IO_OK)
789a424a 2753 return_status = sendcmd_withirq_core(h, c, 1);
2754
1da177e4 2755 cmd_free(h, c, 0);
7c832835 2756 return return_status;
1da177e4 2757}
7c832835 2758
1da177e4 2759static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 2760 sector_t total_size,
7c832835
BH		 2761 unsigned int block_size,
2762 InquiryData_struct *inq_buff,
2763 drive_info_struct *drv)
1da177e4
LT		 2764{
2765 int return_code;
00988a35 2766 unsigned long t;
b57695fe 2767 unsigned char scsi3addr[8];
00988a35 2768
1da177e4 2769 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2770 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2771 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2772 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2773 if (return_code == IO_OK) {
7c832835 2774 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2775 printk(KERN_WARNING
7c832835
BH		 2776 "cciss: reading geometry failed, volume "
2777 "does not support reading geometry\n");
1da177e4 2778 drv->heads = 255;
b028461d 2779 drv->sectors = 32; /* Sectors per track */
7f42d3b8 2780 drv->cylinders = total_size + 1;
89f97ad1 2781 drv->raid_level = RAID_UNKNOWN;
1da177e4 2782 } else {
1da177e4
LT		 2783 drv->heads = inq_buff->data_byte[6];
2784 drv->sectors = inq_buff->data_byte[7];
2785 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2786 drv->cylinders += inq_buff->data_byte[5];
2787 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2788 }
2789 drv->block_size = block_size;
97c06978 2790 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2791 t = drv->heads * drv->sectors;
2792 if (t > 1) {
97c06978
MMOD		 2793 sector_t real_size = total_size + 1;
2794 unsigned long rem = sector_div(real_size, t);
3f7705ea 2795 if (rem)
97c06978
MMOD		 2796 real_size++;
2797 drv->cylinders = real_size;
1da177e4 2798 }
7c832835 2799 } else { /* Get geometry failed */
1da177e4
LT		 2800 printk(KERN_WARNING "cciss: reading geometry failed\n");
2801 }
1da177e4 2802}
7c832835 2803
1da177e4 2804static void
7b838bde 2805cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
7c832835 2806 unsigned int *block_size)
1da177e4 2807{
00988a35 2808 ReadCapdata_struct *buf;
1da177e4 2809 int return_code;
b57695fe 2810 unsigned char scsi3addr[8];
1aebe187
MK		 2811
2812 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2813 if (!buf) {
00988a35
MMOD		 2814 printk(KERN_WARNING "cciss: out of memory\n");
2815 return;
2816 }
1aebe187 2817
b57695fe 2818 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2819 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2820 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2821 if (return_code == IO_OK) {
4c1f2b31
AV		 2822 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2823 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2824 } else { /* read capacity command failed */
1da177e4
LT		 2825 printk(KERN_WARNING "cciss: read capacity failed\n");
2826 *total_size = 0;
2827 *block_size = BLOCK_SIZE;
2828 }
00988a35 2829 kfree(buf);
00988a35
MMOD		 2830}
2831
7b838bde
SC		 2832static void cciss_read_capacity_16(int ctlr, int logvol,
2833 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD		 2834{
2835 ReadCapdata_struct_16 *buf;
2836 int return_code;
b57695fe 2837 unsigned char scsi3addr[8];
1aebe187
MK		 2838
2839 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2840 if (!buf) {
00988a35
MMOD		 2841 printk(KERN_WARNING "cciss: out of memory\n");
2842 return;
2843 }
1aebe187 2844
b57695fe 2845 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2846 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2847 ctlr, buf, sizeof(ReadCapdata_struct_16),
2848 0, scsi3addr, TYPE_CMD);
00988a35 2849 if (return_code == IO_OK) {
4c1f2b31
AV		 2850 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2851 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2852 } else { /* read capacity command failed */
2853 printk(KERN_WARNING "cciss: read capacity failed\n");
2854 *total_size = 0;
2855 *block_size = BLOCK_SIZE;
2856 }
7b92aadf 2857 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2858 (unsigned long long)*total_size+1, *block_size);
00988a35 2859 kfree(buf);
1da177e4
LT		 2860}
2861
1da177e4
LT		 2862static int cciss_revalidate(struct gendisk *disk)
2863{
2864 ctlr_info_t *h = get_host(disk);
2865 drive_info_struct *drv = get_drv(disk);
2866 int logvol;
7c832835 2867 int FOUND = 0;
1da177e4 2868 unsigned int block_size;
00988a35 2869 sector_t total_size;
1da177e4
LT		 2870 InquiryData_struct *inq_buff = NULL;
2871
7c832835 2872 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2873 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2874 sizeof(drv->LunID)) == 0) {
7c832835 2875 FOUND = 1;
1da177e4
LT		 2876 break;
2877 }
2878 }
2879
7c832835
BH		 2880 if (!FOUND)
2881 return 1;
1da177e4 2882
7c832835
BH		 2883 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2884 if (inq_buff == NULL) {
2885 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2886 return 1;
2887 }
00988a35 2888 if (h->cciss_read == CCISS_READ_10) {
7b838bde 2889 cciss_read_capacity(h->ctlr, logvol,
00988a35
MMOD		 2890 &total_size, &block_size);
2891 } else {
7b838bde 2892 cciss_read_capacity_16(h->ctlr, logvol,
00988a35
MMOD		 2893 &total_size, &block_size);
2894 }
7b838bde 2895 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
7c832835 2896 inq_buff, drv);
1da177e4 2897
e1defc4f 2898 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2899 set_capacity(disk, drv->nr_blocks);
2900
1da177e4
LT		 2901 kfree(inq_buff);
2902 return 0;
2903}
2904
1da177e4
LT		 2905/*
2906 * Map (physical) PCI mem into (virtual) kernel space
2907 */
2908static void __iomem *remap_pci_mem(ulong base, ulong size)
2909{
7c832835
BH		 2910 ulong page_base = ((ulong) base) & PAGE_MASK;
2911 ulong page_offs = ((ulong) base) - page_base;
2912 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2913
7c832835 2914 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2915}
2916
7c832835
BH		 2917/*
2918 * Takes jobs of the Q and sends them to the hardware, then puts it on
2919 * the Q to wait for completion.
2920 */
2921static void start_io(ctlr_info_t *h)
1da177e4
LT		 2922{
2923 CommandList_struct *c;
7c832835 2924
8a3173de
JA		 2925 while (!hlist_empty(&h->reqQ)) {
2926 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2927 /* can't do anything if fifo is full */
2928 if ((h->access.fifo_full(h))) {
2929 printk(KERN_WARNING "cciss: fifo full\n");
2930 break;
2931 }
2932
7c832835 2933 /* Get the first entry from the Request Q */
8a3173de 2934 removeQ(c);
1da177e4 2935 h->Qdepth--;
7c832835
BH		 2936
2937 /* Tell the controller execute command */
1da177e4 2938 h->access.submit_command(h, c);
7c832835
BH		 2939
2940 /* Put job onto the completed Q */
8a3173de 2941 addQ(&h->cmpQ, c);
1da177e4
LT		 2942 }
2943}
7c832835 2944
1da177e4
LT		 2945/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2946/* Zeros out the error record and then resends the command back */
2947/* to the controller */
7c832835 2948static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2949{
2950 /* erase the old error information */
2951 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2952
2953 /* add it to software queue and then send it to the controller */
8a3173de 2954 addQ(&h->reqQ, c);
1da177e4 2955 h->Qdepth++;
7c832835 2956 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2957 h->maxQsinceinit = h->Qdepth;
2958
2959 start_io(h);
2960}
a9925a06 2961
1a614f50
SC		 2962static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2963 unsigned int msg_byte, unsigned int host_byte,
2964 unsigned int driver_byte)
2965{
2966 /* inverse of macros in scsi.h */
2967 return (scsi_status_byte & 0xff) |
2968 ((msg_byte & 0xff) << 8) |
2969 ((host_byte & 0xff) << 16) |
2970 ((driver_byte & 0xff) << 24);
2971}
2972
0a9279cc
MM		 2973static inline int evaluate_target_status(ctlr_info_t *h,
2974 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2975{
2976 unsigned char sense_key;
1a614f50
SC		 2977 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2978 int error_value;
2979
0a9279cc 2980 *retry_cmd = 0;
1a614f50
SC		 2981 /* If we get in here, it means we got "target status", that is, scsi status */
2982 status_byte = cmd->err_info->ScsiStatus;
2983 driver_byte = DRIVER_OK;
2984 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2985
33659ebb 2986 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
1a614f50
SC		 2987 host_byte = DID_PASSTHROUGH;
2988 else
2989 host_byte = DID_OK;
2990
2991 error_value = make_status_bytes(status_byte, msg_byte,
2992 host_byte, driver_byte);
03bbfee5 2993
1a614f50 2994 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
33659ebb 2995 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
03bbfee5
MMOD		 2996 printk(KERN_WARNING "cciss: cmd %p "
2997 "has SCSI Status 0x%x\n",
2998 cmd, cmd->err_info->ScsiStatus);
1a614f50 2999 return error_value;
03bbfee5
MMOD		 3000 }
3001
3002 /* check the sense key */
3003 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3004 /* no status or recovered error */
33659ebb
CH		 3005 if (((sense_key == 0x0) || (sense_key == 0x1)) &&
3006 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
1a614f50 3007 error_value = 0;
03bbfee5 3008
0a9279cc 3009 if (check_for_unit_attention(h, cmd)) {
33659ebb 3010 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
0a9279cc
MM		 3011 return 0;
3012 }
3013
33659ebb
CH		 3014 /* Not SG_IO or similar? */
3015 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
1a614f50 3016 if (error_value != 0)
03bbfee5
MMOD		 3017 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3018 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3019 return error_value;
03bbfee5
MMOD		 3020 }
3021
3022 /* SG_IO or similar, copy sense data back */
3023 if (cmd->rq->sense) {
3024 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3025 cmd->rq->sense_len = cmd->err_info->SenseLen;
3026 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3027 cmd->rq->sense_len);
3028 } else
3029 cmd->rq->sense_len = 0;
3030
1a614f50 3031 return error_value;
03bbfee5
MMOD		 3032}
3033
7c832835 3034/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3035 * buffers for the completed job. Note that this function does not need
3036 * to hold the hba/queue lock.
7c832835
BH		 3037 */
3038static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3039 int timeout)
1da177e4 3040{
1da177e4 3041 int retry_cmd = 0;
198b7660
MMOD		 3042 struct request *rq = cmd->rq;
3043
3044 rq->errors = 0;
7c832835 3045
1da177e4 3046 if (timeout)
1a614f50 3047 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3048
d38ae168
MMOD		 3049 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3050 goto after_error_processing;
7c832835 3051
d38ae168 3052 switch (cmd->err_info->CommandStatus) {
d38ae168 3053 case CMD_TARGET_STATUS:
0a9279cc 3054 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3055 break;
3056 case CMD_DATA_UNDERRUN:
33659ebb 3057 if (cmd->rq->cmd_type == REQ_TYPE_FS) {
03bbfee5
MMOD		 3058 printk(KERN_WARNING "cciss: cmd %p has"
3059 " completed with data underrun "
3060 "reported\n", cmd);
c3a4d78c 3061 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3062 }
d38ae168
MMOD		 3063 break;
3064 case CMD_DATA_OVERRUN:
33659ebb 3065 if (cmd->rq->cmd_type == REQ_TYPE_FS)
03bbfee5
MMOD		 3066 printk(KERN_WARNING "cciss: cmd %p has"
3067 " completed with data overrun "
3068 "reported\n", cmd);
d38ae168
MMOD		 3069 break;
3070 case CMD_INVALID:
3071 printk(KERN_WARNING "cciss: cmd %p is "
3072 "reported invalid\n", cmd);
1a614f50
SC		 3073 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3074 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3075 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3076 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3077 break;
3078 case CMD_PROTOCOL_ERR:
3079 printk(KERN_WARNING "cciss: cmd %p has "
3080 "protocol error \n", cmd);
1a614f50
SC		 3081 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3082 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3083 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3084 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3085 break;
3086 case CMD_HARDWARE_ERR:
3087 printk(KERN_WARNING "cciss: cmd %p had "
3088 " hardware error\n", cmd);
1a614f50
SC		 3089 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3090 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3091 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3092 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3093 break;
3094 case CMD_CONNECTION_LOST:
3095 printk(KERN_WARNING "cciss: cmd %p had "
3096 "connection lost\n", cmd);
1a614f50
SC		 3097 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3098 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3099 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3100 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3101 break;
3102 case CMD_ABORTED:
3103 printk(KERN_WARNING "cciss: cmd %p was "
3104 "aborted\n", cmd);
1a614f50
SC		 3105 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3106 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3107 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3108 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3109 break;
3110 case CMD_ABORT_FAILED:
3111 printk(KERN_WARNING "cciss: cmd %p reports "
3112 "abort failed\n", cmd);
1a614f50
SC		 3113 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3114 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3115 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3116 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3117 break;
3118 case CMD_UNSOLICITED_ABORT:
3119 printk(KERN_WARNING "cciss%d: unsolicited "
3120 "abort %p\n", h->ctlr, cmd);
3121 if (cmd->retry_count < MAX_CMD_RETRIES) {
3122 retry_cmd = 1;
3123 printk(KERN_WARNING
3124 "cciss%d: retrying %p\n", h->ctlr, cmd);
3125 cmd->retry_count++;
3126 } else
3127 printk(KERN_WARNING
3128 "cciss%d: %p retried too "
3129 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3130 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3131 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3132 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3133 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3134 break;
3135 case CMD_TIMEOUT:
3136 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3137 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3138 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3139 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3140 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3141 break;
3142 default:
3143 printk(KERN_WARNING "cciss: cmd %p returned "
3144 "unknown status %x\n", cmd,
3145 cmd->err_info->CommandStatus);
1a614f50
SC		 3146 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3147 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3148 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3149 DID_PASSTHROUGH : DID_ERROR);
1da177e4 3150 }
d38ae168
MMOD		 3151
3152after_error_processing:
3153
1da177e4 3154 /* We need to return this command */
7c832835
BH		 3155 if (retry_cmd) {
3156 resend_cciss_cmd(h, cmd);
1da177e4 3157 return;
7c832835 3158 }
03bbfee5 3159 cmd->rq->completion_data = cmd;
a9925a06 3160 blk_complete_request(cmd->rq);
1da177e4
LT		 3161}
3162
0c2b3908
MM		 3163static inline u32 cciss_tag_contains_index(u32 tag)
3164{
5e216153 3165#define DIRECT_LOOKUP_BIT 0x10
0c2b3908
MM		 3166 return tag & DIRECT_LOOKUP_BIT;
3167}
3168
3169static inline u32 cciss_tag_to_index(u32 tag)
3170{
5e216153 3171#define DIRECT_LOOKUP_SHIFT 5
0c2b3908
MM		 3172 return tag >> DIRECT_LOOKUP_SHIFT;
3173}
3174
3175static inline u32 cciss_tag_discard_error_bits(u32 tag)
3176{
3177#define CCISS_ERROR_BITS 0x03
3178 return tag & ~CCISS_ERROR_BITS;
3179}
3180
3181static inline void cciss_mark_tag_indexed(u32 *tag)
3182{
3183 *tag |= DIRECT_LOOKUP_BIT;
3184}
3185
3186static inline void cciss_set_tag_index(u32 *tag, u32 index)
3187{
3188 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3189}
3190
7c832835
BH		 3191/*
3192 * Get a request and submit it to the controller.
1da177e4 3193 */
165125e1 3194static void do_cciss_request(struct request_queue *q)
1da177e4 3195{
7c832835 3196 ctlr_info_t *h = q->queuedata;
1da177e4 3197 CommandList_struct *c;
00988a35
MMOD		 3198 sector_t start_blk;
3199 int seg;
1da177e4
LT		 3200 struct request *creq;
3201 u64bit temp64;
5c07a311
DB		 3202 struct scatterlist *tmp_sg;
3203 SGDescriptor_struct *curr_sg;
1da177e4
LT		 3204 drive_info_struct *drv;
3205 int i, dir;
5c07a311
DB		 3206 int sg_index = 0;
3207 int chained = 0;
1da177e4
LT		 3208
3209 /* We call start_io here in case there is a command waiting on the
3210 * queue that has not been sent.
7c832835 3211 */
1da177e4
LT		 3212 if (blk_queue_plugged(q))
3213 goto startio;
3214
7c832835 3215 queue:
9934c8c0 3216 creq = blk_peek_request(q);
1da177e4
LT		 3217 if (!creq)
3218 goto startio;
3219
5c07a311 3220 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
1da177e4 3221
7c832835 3222 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3223 goto full;
3224
9934c8c0 3225 blk_start_request(creq);
1da177e4 3226
5c07a311 3227 tmp_sg = h->scatter_list[c->cmdindex];
1da177e4
LT		 3228 spin_unlock_irq(q->queue_lock);
3229
3230 c->cmd_type = CMD_RWREQ;
3231 c->rq = creq;
7c832835
BH		 3232
3233 /* fill in the request */
1da177e4 3234 drv = creq->rq_disk->private_data;
b028461d 3235 c->Header.ReplyQueue = 0; /* unused in simple mode */
33079b21
MM		 3236 /* got command from pool, so use the command block index instead */
3237 /* for direct lookups. */
3238 /* The first 2 bits are reserved for controller error reporting. */
0c2b3908
MM		 3239 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3240 cciss_mark_tag_indexed(&c->Header.Tag.lower);
39ccf9a6 3241 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
b028461d 3242 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3243 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
7c832835
BH		 3244 c->Request.Type.Attribute = ATTR_SIMPLE;
3245 c->Request.Type.Direction =
a52de245 3246 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
b028461d 3247 c->Request.Timeout = 0; /* Don't time out */
7c832835 3248 c->Request.CDB[0] =
00988a35 3249 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3250 start_blk = blk_rq_pos(creq);
1da177e4 3251#ifdef CCISS_DEBUG
83096ebf
TH		 3252 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3253 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3254#endif /* CCISS_DEBUG */
1da177e4 3255
5c07a311 3256 sg_init_table(tmp_sg, h->maxsgentries);
1da177e4
LT		 3257 seg = blk_rq_map_sg(q, creq, tmp_sg);
3258
7c832835 3259 /* get the DMA records for the setup */
1da177e4
LT		 3260 if (c->Request.Type.Direction == XFER_READ)
3261 dir = PCI_DMA_FROMDEVICE;
3262 else
3263 dir = PCI_DMA_TODEVICE;
3264
5c07a311
DB		 3265 curr_sg = c->SG;
3266 sg_index = 0;
3267 chained = 0;
3268
7c832835 3269 for (i = 0; i < seg; i++) {
5c07a311
DB		 3270 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3271 !chained && ((seg - i) > 1)) {
5c07a311 3272 /* Point to next chain block. */
dccc9b56 3273 curr_sg = h->cmd_sg_list[c->cmdindex];
5c07a311
DB		 3274 sg_index = 0;
3275 chained = 1;
3276 }
3277 curr_sg[sg_index].Len = tmp_sg[i].length;
45711f1a 3278 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
5c07a311
DB		 3279 tmp_sg[i].offset,
3280 tmp_sg[i].length, dir);
3281 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3282 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3283 curr_sg[sg_index].Ext = 0; /* we are not chaining */
5c07a311 3284 ++sg_index;
1da177e4 3285 }
d45033ef
SC		 3286 if (chained)
3287 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3288 (seg - (h->max_cmd_sgentries - 1)) *
3289 sizeof(SGDescriptor_struct));
5c07a311 3290
7c832835
BH		 3291 /* track how many SG entries we are using */
3292 if (seg > h->maxSG)
3293 h->maxSG = seg;
1da177e4
LT		 3294
3295#ifdef CCISS_DEBUG
5c07a311
DB		 3296 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3297 "chained[%d]\n",
3298 blk_rq_sectors(creq), seg, chained);
7c832835 3299#endif /* CCISS_DEBUG */
1da177e4 3300
5e216153
MM		 3301 c->Header.SGTotal = seg + chained;
3302 if (seg <= h->max_cmd_sgentries)
3303 c->Header.SGList = c->Header.SGTotal;
3304 else
5c07a311 3305 c->Header.SGList = h->max_cmd_sgentries;
5e216153 3306 set_performant_mode(h, c);
5c07a311 3307
33659ebb 3308 if (likely(creq->cmd_type == REQ_TYPE_FS)) {
03bbfee5
MMOD		 3309 if(h->cciss_read == CCISS_READ_10) {
3310 c->Request.CDB[1] = 0;
b028461d 3311 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
03bbfee5
MMOD		 3312 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3313 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3314 c->Request.CDB[5] = start_blk & 0xff;
b028461d 3315 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
83096ebf
TH		 3316 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3317 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3318 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3319 } else {
582539e5
RD		 3320 u32 upper32 = upper_32_bits(start_blk);
3321
03bbfee5
MMOD		 3322 c->Request.CDBLen = 16;
3323 c->Request.CDB[1]= 0;
b028461d 3324 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
582539e5
RD		 3325 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3326 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3327 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3328 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3329 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3330 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3331 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3332 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3333 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3334 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3335 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3336 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3337 }
33659ebb 3338 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
03bbfee5
MMOD		 3339 c->Request.CDBLen = creq->cmd_len;
3340 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3341 } else {
03bbfee5
MMOD		 3342 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3343 BUG();
00988a35 3344 }
1da177e4
LT		 3345
3346 spin_lock_irq(q->queue_lock);
3347
8a3173de 3348 addQ(&h->reqQ, c);
1da177e4 3349 h->Qdepth++;
7c832835
BH		 3350 if (h->Qdepth > h->maxQsinceinit)
3351 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3352
3353 goto queue;
00988a35 3354full:
1da177e4 3355 blk_stop_queue(q);
00988a35 3356startio:
1da177e4
LT		 3357 /* We will already have the driver lock here so not need
3358 * to lock it.
7c832835 3359 */
1da177e4
LT		 3360 start_io(h);
3361}
3362
3da8b713 3363static inline unsigned long get_next_completion(ctlr_info_t *h)
3364{
3da8b713 3365 return h->access.command_completed(h);
3da8b713 3366}
3367
3368static inline int interrupt_pending(ctlr_info_t *h)
3369{
3da8b713 3370 return h->access.intr_pending(h);
3da8b713 3371}
3372
3373static inline long interrupt_not_for_us(ctlr_info_t *h)
3374{
2cf3af1c
MM		 3375 return !(h->msi_vector || h->msix_vector) &&
3376 ((h->access.intr_pending(h) == 0) ||
3377 (h->interrupts_enabled == 0));
3da8b713 3378}
3379
0c2b3908
MM		 3380static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3381 u32 raw_tag)
1da177e4 3382{
0c2b3908
MM		 3383 if (unlikely(tag_index >= h->nr_cmds)) {
3384 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3385 return 1;
3386 }
3387 return 0;
3388}
3389
3390static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3391 u32 raw_tag)
3392{
3393 removeQ(c);
3394 if (likely(c->cmd_type == CMD_RWREQ))
3395 complete_command(h, c, 0);
3396 else if (c->cmd_type == CMD_IOCTL_PEND)
3397 complete(c->waiting);
3398#ifdef CONFIG_CISS_SCSI_TAPE
3399 else if (c->cmd_type == CMD_SCSI)
3400 complete_scsi_command(c, 0, raw_tag);
3401#endif
3402}
3403
29979a71
MM		 3404static inline u32 next_command(ctlr_info_t *h)
3405{
3406 u32 a;
3407
3408 if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
3409 return h->access.command_completed(h);
3410
3411 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
3412 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
3413 (h->reply_pool_head)++;
3414 h->commands_outstanding--;
3415 } else {
3416 a = FIFO_EMPTY;
3417 }
3418 /* Check for wraparound */
3419 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
3420 h->reply_pool_head = h->reply_pool;
3421 h->reply_pool_wraparound ^= 1;
3422 }
3423 return a;
3424}
3425
0c2b3908
MM		 3426/* process completion of an indexed ("direct lookup") command */
3427static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3428{
3429 u32 tag_index;
1da177e4 3430 CommandList_struct *c;
0c2b3908
MM		 3431
3432 tag_index = cciss_tag_to_index(raw_tag);
3433 if (bad_tag(h, tag_index, raw_tag))
5e216153 3434 return next_command(h);
0c2b3908
MM		 3435 c = h->cmd_pool + tag_index;
3436 finish_cmd(h, c, raw_tag);
5e216153 3437 return next_command(h);
0c2b3908
MM		 3438}
3439
3440/* process completion of a non-indexed command */
3441static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3442{
3443 u32 tag;
3444 CommandList_struct *c = NULL;
3445 struct hlist_node *tmp;
3446 __u32 busaddr_masked, tag_masked;
3447
3448 tag = cciss_tag_discard_error_bits(raw_tag);
3449 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3450 busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
3451 tag_masked = cciss_tag_discard_error_bits(tag);
3452 if (busaddr_masked == tag_masked) {
3453 finish_cmd(h, c, raw_tag);
5e216153 3454 return next_command(h);
0c2b3908
MM		 3455 }
3456 }
3457 bad_tag(h, h->nr_cmds + 1, raw_tag);
5e216153 3458 return next_command(h);
0c2b3908
MM		 3459}
3460
3461static irqreturn_t do_cciss_intx(int irq, void *dev_id)
3462{
3463 ctlr_info_t *h = dev_id;
1da177e4 3464 unsigned long flags;
0c2b3908 3465 u32 raw_tag;
1da177e4 3466
3da8b713 3467 if (interrupt_not_for_us(h))
1da177e4 3468 return IRQ_NONE;
1da177e4
LT		 3469 /*
3470 * If there are completed commands in the completion queue,
3471 * we had better do something about it.
3472 */
3473 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3474 while (interrupt_pending(h)) {
0c2b3908
MM		 3475 raw_tag = get_next_completion(h);
3476 while (raw_tag != FIFO_EMPTY) {
3477 if (cciss_tag_contains_index(raw_tag))
3478 raw_tag = process_indexed_cmd(h, raw_tag);
3479 else
3480 raw_tag = process_nonindexed_cmd(h, raw_tag);
3481 }
3482 }
33079b21 3483
0c2b3908
MM		 3484 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3485 return IRQ_HANDLED;
3486}
33079b21 3487
0c2b3908
MM		 3488/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3489 * check the interrupt pending register because it is not set.
3490 */
3491static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3492{
3493 ctlr_info_t *h = dev_id;
3494 unsigned long flags;
3495 u32 raw_tag;
8a3173de 3496
0c2b3908
MM		 3497 if (interrupt_not_for_us(h))
3498 return IRQ_NONE;
3499 /*
3500 * If there are completed commands in the completion queue,
3501 * we had better do something about it.
3502 */
3503 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3504 raw_tag = get_next_completion(h);
3505 while (raw_tag != FIFO_EMPTY) {
3506 if (cciss_tag_contains_index(raw_tag))
3507 raw_tag = process_indexed_cmd(h, raw_tag);
3508 else
3509 raw_tag = process_nonindexed_cmd(h, raw_tag);
1da177e4
LT		 3510 }
3511
1da177e4
LT		 3512 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3513 return IRQ_HANDLED;
3514}
7c832835 3515
b368c9dd
AP		 3516/**
3517 * add_to_scan_list() - add controller to rescan queue
3518 * @h: Pointer to the controller.
3519 *
3520 * Adds the controller to the rescan queue if not already on the queue.
3521 *
3522 * returns 1 if added to the queue, 0 if skipped (could be on the
3523 * queue already, or the controller could be initializing or shutting
3524 * down).
3525 **/
3526static int add_to_scan_list(struct ctlr_info *h)
3527{
3528 struct ctlr_info *test_h;
3529 int found = 0;
3530 int ret = 0;
3531
3532 if (h->busy_initializing)
3533 return 0;
3534
3535 if (!mutex_trylock(&h->busy_shutting_down))
3536 return 0;
3537
3538 mutex_lock(&scan_mutex);
3539 list_for_each_entry(test_h, &scan_q, scan_list) {
3540 if (test_h == h) {
3541 found = 1;
3542 break;
3543 }
3544 }
3545 if (!found && !h->busy_scanning) {
3546 INIT_COMPLETION(h->scan_wait);
3547 list_add_tail(&h->scan_list, &scan_q);
3548 ret = 1;
3549 }
3550 mutex_unlock(&scan_mutex);
3551 mutex_unlock(&h->busy_shutting_down);
3552
3553 return ret;
3554}
3555
3556/**
3557 * remove_from_scan_list() - remove controller from rescan queue
3558 * @h: Pointer to the controller.
3559 *
3560 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC		 3561 * the controller is currently conducting a rescan. The controller
3562 * can be in one of three states:
3563 * 1. Doesn't need a scan
3564 * 2. On the scan list, but not scanning yet (we remove it)
3565 * 3. Busy scanning (and not on the list). In this case we want to wait for
3566 * the scan to complete to make sure the scanning thread for this
3567 * controller is completely idle.
b368c9dd
AP		 3568 **/
3569static void remove_from_scan_list(struct ctlr_info *h)
3570{
3571 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP		 3572
3573 mutex_lock(&scan_mutex);
3574 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3575 if (test_h == h) { /* state 2. */
b368c9dd
AP		 3576 list_del(&h->scan_list);
3577 complete_all(&h->scan_wait);
3578 mutex_unlock(&scan_mutex);
3579 return;
3580 }
3581 }
fd8489cf
SC		 3582 if (h->busy_scanning) { /* state 3. */
3583 mutex_unlock(&scan_mutex);
b368c9dd 3584 wait_for_completion(&h->scan_wait);
fd8489cf
SC		 3585 } else { /* state 1, nothing to do. */
3586 mutex_unlock(&scan_mutex);
3587 }
b368c9dd
AP		 3588}
3589
3590/**
3591 * scan_thread() - kernel thread used to rescan controllers
3592 * @data: Ignored.
3593 *
3594 * A kernel thread used scan for drive topology changes on
3595 * controllers. The thread processes only one controller at a time
3596 * using a queue. Controllers are added to the queue using
3597 * add_to_scan_list() and removed from the queue either after done
3598 * processing or using remove_from_scan_list().
3599 *
3600 * returns 0.
3601 **/
0a9279cc
MM		 3602static int scan_thread(void *data)
3603{
b368c9dd 3604 struct ctlr_info *h;
0a9279cc 3605
b368c9dd
AP		 3606 while (1) {
3607 set_current_state(TASK_INTERRUPTIBLE);
3608 schedule();
0a9279cc
MM		 3609 if (kthread_should_stop())
3610 break;
b368c9dd
AP		 3611
3612 while (1) {
3613 mutex_lock(&scan_mutex);
3614 if (list_empty(&scan_q)) {
3615 mutex_unlock(&scan_mutex);
3616 break;
3617 }
3618
3619 h = list_entry(scan_q.next,
3620 struct ctlr_info,
3621 scan_list);
3622 list_del(&h->scan_list);
3623 h->busy_scanning = 1;
3624 mutex_unlock(&scan_mutex);
3625
d06dfbd2
SC		 3626 rebuild_lun_table(h, 0, 0);
3627 complete_all(&h->scan_wait);
3628 mutex_lock(&scan_mutex);
3629 h->busy_scanning = 0;
3630 mutex_unlock(&scan_mutex);
b368c9dd 3631 }
0a9279cc 3632 }
b368c9dd 3633
0a9279cc
MM		 3634 return 0;
3635}
3636
3637static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3638{
3639 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3640 return 0;
3641
3642 switch (c->err_info->SenseInfo[12]) {
3643 case STATE_CHANGED:
3644 printk(KERN_WARNING "cciss%d: a state change "
3645 "detected, command retried\n", h->ctlr);
3646 return 1;
3647 break;
3648 case LUN_FAILED:
3649 printk(KERN_WARNING "cciss%d: LUN failure "
3650 "detected, action required\n", h->ctlr);
3651 return 1;
3652 break;
3653 case REPORT_LUNS_CHANGED:
3654 printk(KERN_WARNING "cciss%d: report LUN data "
3655 "changed\n", h->ctlr);
da002184
SC		 3656 /*
3657 * Here, we could call add_to_scan_list and wake up the scan thread,
3658 * except that it's quite likely that we will get more than one
3659 * REPORT_LUNS_CHANGED condition in quick succession, which means
3660 * that those which occur after the first one will likely happen
3661 * *during* the scan_thread's rescan. And the rescan code is not
3662 * robust enough to restart in the middle, undoing what it has already
3663 * done, and it's not clear that it's even possible to do this, since
3664 * part of what it does is notify the block layer, which starts
3665 * doing it's own i/o to read partition tables and so on, and the
3666 * driver doesn't have visibility to know what might need undoing.
3667 * In any event, if possible, it is horribly complicated to get right
3668 * so we just don't do it for now.
3669 *
3670 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3671 */
0a9279cc
MM		 3672 return 1;
3673 break;
3674 case POWER_OR_RESET:
3675 printk(KERN_WARNING "cciss%d: a power on "
3676 "or device reset detected\n", h->ctlr);
3677 return 1;
3678 break;
3679 case UNIT_ATTENTION_CLEARED:
3680 printk(KERN_WARNING "cciss%d: unit attention "
3681 "cleared by another initiator\n", h->ctlr);
3682 return 1;
3683 break;
3684 default:
3685 printk(KERN_WARNING "cciss%d: unknown "
3686 "unit attention detected\n", h->ctlr);
3687 return 1;
3688 }
3689}
3690
7c832835 3691/*
d14c4ab5 3692 * We cannot read the structure directly, for portability we must use
1da177e4 3693 * the io functions.
7c832835 3694 * This is for debug only.
1da177e4
LT		 3695 */
3696#ifdef CCISS_DEBUG
7c832835 3697static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3698{
3699 int i;
3700 char temp_name[17];
3701
3702 printk("Controller Configuration information\n");
3703 printk("------------------------------------\n");
7c832835 3704 for (i = 0; i < 4; i++)
1da177e4 3705 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3706 temp_name[4] = '\0';
3707 printk(" Signature = %s\n", temp_name);
1da177e4 3708 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3709 printk(" Transport methods supported = 0x%x\n",
3710 readl(&(tb->TransportSupport)));
3711 printk(" Transport methods active = 0x%x\n",
3712 readl(&(tb->TransportActive)));
3713 printk(" Requested transport Method = 0x%x\n",
3714 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3715 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3716 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3717 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3718 readl(&(tb->HostWrite.CoalIntCount)));
3719 printk(" Max outstanding commands = 0x%d\n",
3720 readl(&(tb->CmdsOutMax)));
3721 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3722 for (i = 0; i < 16; i++)
1da177e4
LT		 3723 temp_name[i] = readb(&(tb->ServerName[i]));
3724 temp_name[16] = '\0';
3725 printk(" Server Name = %s\n", temp_name);
7c832835 3726 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3727}
7c832835 3728#endif /* CCISS_DEBUG */
1da177e4 3729
7c832835 3730static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3731{
3732 int i, offset, mem_type, bar_type;
7c832835 3733 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3734 return 0;
3735 offset = 0;
7c832835
BH		 3736 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3737 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3738 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3739 offset += 4;
3740 else {
3741 mem_type = pci_resource_flags(pdev, i) &
7c832835 3742 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3743 switch (mem_type) {
7c832835
BH		 3744 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3745 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3746 offset += 4; /* 32 bit */
3747 break;
3748 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3749 offset += 8;
3750 break;
3751 default: /* reserved in PCI 2.2 */
3752 printk(KERN_WARNING
3753 "Base address is invalid\n");
3754 return -1;
1da177e4
LT		 3755 break;
3756 }
3757 }
7c832835
BH		 3758 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3759 return i + 1;
1da177e4
LT		 3760 }
3761 return -1;
3762}
3763
5e216153
MM		 3764/* Fill in bucket_map[], given nsgs (the max number of
3765 * scatter gather elements supported) and bucket[],
3766 * which is an array of 8 integers. The bucket[] array
3767 * contains 8 different DMA transfer sizes (in 16
3768 * byte increments) which the controller uses to fetch
3769 * commands. This function fills in bucket_map[], which
3770 * maps a given number of scatter gather elements to one of
3771 * the 8 DMA transfer sizes. The point of it is to allow the
3772 * controller to only do as much DMA as needed to fetch the
3773 * command, with the DMA transfer size encoded in the lower
3774 * bits of the command address.
3775 */
3776static void calc_bucket_map(int bucket[], int num_buckets,
3777 int nsgs, int *bucket_map)
3778{
3779 int i, j, b, size;
3780
3781 /* even a command with 0 SGs requires 4 blocks */
3782#define MINIMUM_TRANSFER_BLOCKS 4
3783#define NUM_BUCKETS 8
3784 /* Note, bucket_map must have nsgs+1 entries. */
3785 for (i = 0; i <= nsgs; i++) {
3786 /* Compute size of a command with i SG entries */
3787 size = i + MINIMUM_TRANSFER_BLOCKS;
3788 b = num_buckets; /* Assume the biggest bucket */
3789 /* Find the bucket that is just big enough */
3790 for (j = 0; j < 8; j++) {
3791 if (bucket[j] >= size) {
3792 b = j;
3793 break;
3794 }
3795 }
3796 /* for a command with i SG entries, use bucket b. */
3797 bucket_map[i] = b;
3798 }
3799}
3800
3801static void
3802cciss_put_controller_into_performant_mode(ctlr_info_t *h)
3803{
3804 int l = 0;
3805 __u32 trans_support;
3806 __u32 trans_offset;
3807 /*
3808 * 5 = 1 s/g entry or 4k
3809 * 6 = 2 s/g entry or 8k
3810 * 8 = 4 s/g entry or 16k
3811 * 10 = 6 s/g entry or 24k
3812 */
3813 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
3814 unsigned long register_value;
3815
3816 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
3817
3818 /* Attempt to put controller into performant mode if supported */
3819 /* Does board support performant mode? */
3820 trans_support = readl(&(h->cfgtable->TransportSupport));
3821 if (!(trans_support & PERFORMANT_MODE))
3822 return;
3823
3824 printk(KERN_WARNING "cciss%d: Placing controller into "
3825 "performant mode\n", h->ctlr);
3826 /* Performant mode demands commands on a 32 byte boundary
3827 * pci_alloc_consistent aligns on page boundarys already.
3828 * Just need to check if divisible by 32
3829 */
3830 if ((sizeof(CommandList_struct) % 32) != 0) {
3831 printk(KERN_WARNING "%s %d %s\n",
3832 "cciss info: command size[",
3833 (int)sizeof(CommandList_struct),
3834 "] not divisible by 32, no performant mode..\n");
3835 return;
3836 }
3837
3838 /* Performant mode ring buffer and supporting data structures */
3839 h->reply_pool = (__u64 *)pci_alloc_consistent(
3840 h->pdev, h->max_commands * sizeof(__u64),
3841 &(h->reply_pool_dhandle));
3842
3843 /* Need a block fetch table for performant mode */
3844 h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
3845 sizeof(__u32)), GFP_KERNEL);
3846
3847 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
3848 goto clean_up;
3849
3850 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3851
3852 /* Controller spec: zero out this buffer. */
3853 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
3854 h->reply_pool_head = h->reply_pool;
3855
3856 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3857 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
3858 h->blockFetchTable);
3859 writel(bft[0], &h->transtable->BlockFetch0);
3860 writel(bft[1], &h->transtable->BlockFetch1);
3861 writel(bft[2], &h->transtable->BlockFetch2);
3862 writel(bft[3], &h->transtable->BlockFetch3);
3863 writel(bft[4], &h->transtable->BlockFetch4);
3864 writel(bft[5], &h->transtable->BlockFetch5);
3865 writel(bft[6], &h->transtable->BlockFetch6);
3866 writel(bft[7], &h->transtable->BlockFetch7);
3867
3868 /* size of controller ring buffer */
3869 writel(h->max_commands, &h->transtable->RepQSize);
3870 writel(1, &h->transtable->RepQCount);
3871 writel(0, &h->transtable->RepQCtrAddrLow32);
3872 writel(0, &h->transtable->RepQCtrAddrHigh32);
3873 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3874 writel(0, &h->transtable->RepQAddr0High32);
3875 writel(CFGTBL_Trans_Performant,
3876 &(h->cfgtable->HostWrite.TransportRequest));
3877
3878 h->transMethod = CFGTBL_Trans_Performant;
3879 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3880 /* under certain very rare conditions, this can take awhile.
3881 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3882 * as we enter this code.) */
3883 for (l = 0; l < MAX_CONFIG_WAIT; l++) {
3884 register_value = readl(h->vaddr + SA5_DOORBELL);
3885 if (!(register_value & CFGTBL_ChangeReq))
3886 break;
3887 /* delay and try again */
3888 set_current_state(TASK_INTERRUPTIBLE);
3889 schedule_timeout(10);
3890 }
3891 register_value = readl(&(h->cfgtable->TransportActive));
3892 if (!(register_value & CFGTBL_Trans_Performant)) {
3893 printk(KERN_WARNING "cciss: unable to get board into"
3894 " performant mode\n");
3895 return;
3896 }
3897
3898 /* Change the access methods to the performant access methods */
3899 h->access = SA5_performant_access;
3900
3901 return;
3902clean_up:
3903 kfree(h->blockFetchTable);
3904 if (h->reply_pool)
3905 pci_free_consistent(h->pdev,
3906 h->max_commands * sizeof(__u64),
3907 h->reply_pool,
3908 h->reply_pool_dhandle);
3909 return;
3910
3911} /* cciss_put_controller_into_performant_mode */
3912
fb86a35b
MM		 3913/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3914 * controllers that are capable. If not, we use IO-APIC mode.
3915 */
3916
7c832835
BH		 3917static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3918 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3919{
3920#ifdef CONFIG_PCI_MSI
7c832835
BH		 3921 int err;
3922 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3923 {0, 2}, {0, 3}
3924 };
fb86a35b
MM		 3925
3926 /* Some boards advertise MSI but don't really support it */
3927 if ((board_id == 0x40700E11) ||
7c832835
BH		 3928 (board_id == 0x40800E11) ||
3929 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3930 goto default_int_mode;
3931
7c832835
BH		 3932 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3933 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3934 if (!err) {
3935 c->intr[0] = cciss_msix_entries[0].vector;
3936 c->intr[1] = cciss_msix_entries[1].vector;
3937 c->intr[2] = cciss_msix_entries[2].vector;
3938 c->intr[3] = cciss_msix_entries[3].vector;
3939 c->msix_vector = 1;
3940 return;
3941 }
3942 if (err > 0) {
3943 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3944 "available\n", err);
1ecb9c0f 3945 goto default_int_mode;
7c832835
BH		 3946 } else {
3947 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3948 err);
1ecb9c0f 3949 goto default_int_mode;
7c832835
BH		 3950 }
3951 }
3952 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3953 if (!pci_enable_msi(pdev)) {
7c832835 3954 c->msi_vector = 1;
7c832835
BH		 3955 } else {
3956 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3957 }
3958 }
1ecb9c0f 3959default_int_mode:
7c832835 3960#endif /* CONFIG_PCI_MSI */
fb86a35b 3961 /* if we get here we're going to use the default interrupt mode */
5e216153 3962 c->intr[PERF_MODE_INT] = pdev->irq;
fb86a35b
MM		 3963 return;
3964}
3965
7d1fd970 3966static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3967{
3968 ushort subsystem_vendor_id, subsystem_device_id, command;
3969 __u32 board_id, scratchpad = 0;
3970 __u64 cfg_offset;
3971 __u32 cfg_base_addr;
3972 __u64 cfg_base_addr_index;
2ec24ff1 3973 int i, prod_index, err;
5e216153 3974 __u32 trans_offset;
2ec24ff1
SC		 3975
3976 subsystem_vendor_id = pdev->subsystem_vendor;
3977 subsystem_device_id = pdev->subsystem_device;
3978 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3979 subsystem_vendor_id);
3980
3981 for (i = 0; i < ARRAY_SIZE(products); i++) {
3982 /* Stand aside for hpsa driver on request */
3983 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3984 return -ENODEV;
3985 if (board_id == products[i].board_id)
3986 break;
3987 }
3988 prod_index = i;
3989 if (prod_index == ARRAY_SIZE(products)) {
3990 dev_warn(&pdev->dev,
3991 "unrecognized board ID: 0x%08lx, ignoring.\n",
3992 (unsigned long) board_id);
3993 return -ENODEV;
3994 }
1da177e4
LT		 3995
3996 /* check to see if controller has been disabled */
3997 /* BEFORE trying to enable it */
7c832835
BH		 3998 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3999 if (!(command & 0x02)) {
4000 printk(KERN_WARNING
4001 "cciss: controller appears to be disabled\n");
c33ac89b 4002 return -ENODEV;
1da177e4
LT		 4003 }
4004
c33ac89b 4005 err = pci_enable_device(pdev);
7c832835 4006 if (err) {
1da177e4 4007 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 4008 return err;
1da177e4 4009 }
1da177e4 4010
4e570309
BH		 4011 err = pci_request_regions(pdev, "cciss");
4012 if (err) {
4013 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 4014 "aborting\n");
872225ca 4015 return err;
4e570309
BH		 4016 }
4017
1da177e4
LT		 4018#ifdef CCISS_DEBUG
4019 printk("command = %x\n", command);
4020 printk("irq = %x\n", pdev->irq);
4021 printk("board_id = %x\n", board_id);
7c832835 4022#endif /* CCISS_DEBUG */
1da177e4 4023
fb86a35b
MM		 4024/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
4025 * else we use the IO-APIC interrupt assigned to us by system ROM.
4026 */
4027 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 4028
e1438581
MM		 4029 /* find the memory BAR */
4030 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
4031 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
4032 break;
4033 }
4034 if (i == DEVICE_COUNT_RESOURCE) {
4035 printk(KERN_WARNING "cciss: No memory BAR found\n");
4036 err = -ENODEV;
4037 goto err_out_free_res;
4038 }
4039
4040 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
4041 * already removed
4042 */
1da177e4 4043
1da177e4 4044#ifdef CCISS_DEBUG
9f92f471 4045 printk("address 0 = %lx\n", c->paddr);
7c832835 4046#endif /* CCISS_DEBUG */
a5b92873 4047 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 4048
4049 /* Wait for the board to become ready. (PCI hotplug needs this.)
4050 * We poll for up to 120 secs, once per 100ms. */
7c832835 4051 for (i = 0; i < 1200; i++) {
1da177e4
LT		 4052 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
4053 if (scratchpad == CCISS_FIRMWARE_READY)
4054 break;
4055 set_current_state(TASK_INTERRUPTIBLE);
4d761609 4056 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 4057 }
4058 if (scratchpad != CCISS_FIRMWARE_READY) {
4059 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 4060 err = -ENODEV;
4e570309 4061 goto err_out_free_res;
1da177e4
LT		 4062 }
4063
4064 /* get the address index number */
4065 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
4066 cfg_base_addr &= (__u32) 0x0000ffff;
4067#ifdef CCISS_DEBUG
4068 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 4069#endif /* CCISS_DEBUG */
4070 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 4071#ifdef CCISS_DEBUG
9f92f471
RD		 4072 printk("cfg base address index = %llx\n",
4073 (unsigned long long)cfg_base_addr_index);
7c832835 4074#endif /* CCISS_DEBUG */
1da177e4
LT		 4075 if (cfg_base_addr_index == -1) {
4076 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 4077 err = -ENODEV;
4e570309 4078 goto err_out_free_res;
1da177e4
LT		 4079 }
4080
4081 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
4082#ifdef CCISS_DEBUG
9f92f471 4083 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 4084#endif /* CCISS_DEBUG */
4085 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
4086 cfg_base_addr_index) +
4087 cfg_offset, sizeof(CfgTable_struct));
5e216153
MM		 4088 /* Find performant mode table. */
4089 trans_offset = readl(&(c->cfgtable->TransMethodOffset));
4090 c->transtable = remap_pci_mem(pci_resource_start(pdev,
4091 cfg_base_addr_index) + cfg_offset+trans_offset,
4092 sizeof(*c->transtable));
1da177e4
LT		 4093 c->board_id = board_id;
4094
5e216153
MM		 4095 #ifdef CCISS_DEBUG
4096 print_cfg_table(c->cfgtable);
4097 #endif /* CCISS_DEBUG */
1da177e4 4098
49153998
MM		 4099 /* Some controllers support Zero Memory Raid (ZMR).
4100 * When configured in ZMR mode the number of supported
4101 * commands drops to 64. So instead of just setting an
4102 * arbitrary value we make the driver a little smarter.
4103 * We read the config table to tell us how many commands
4104 * are supported on the controller then subtract 4 to
4105 * leave a little room for ioctl calls.
4106 */
5e216153 4107 c->max_commands = readl(&(c->cfgtable->MaxPerformantModeCommands));
5c07a311
DB		 4108 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
4109
4110 /*
4111 * Limit native command to 32 s/g elements to save dma'able memory.
4112 * Howvever spec says if 0, use 31
4113 */
4114
4115 c->max_cmd_sgentries = 31;
4116 if (c->maxsgentries > 512) {
4117 c->max_cmd_sgentries = 32;
4118 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
4119 c->maxsgentries -= 1; /* account for chain pointer */
4120 } else {
4121 c->maxsgentries = 31; /* Default to traditional value */
4122 c->chainsize = 0; /* traditional */
4123 }
4124
2ec24ff1
SC		 4125 c->product_name = products[prod_index].product_name;
4126 c->access = *(products[prod_index].access);
4127 c->nr_cmds = c->max_commands - 4;
7c832835
BH		 4128 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
4129 (readb(&c->cfgtable->Signature[1]) != 'I') ||
4130 (readb(&c->cfgtable->Signature[2]) != 'S') ||
4131 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 4132 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 4133 err = -ENODEV;
4e570309 4134 goto err_out_free_res;
1da177e4 4135 }
1da177e4 4136#ifdef CONFIG_X86
7c832835
BH		 4137 {
4138 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
4139 __u32 prefetch;
4140 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
4141 prefetch |= 0x100;
4142 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
4143 }
1da177e4
LT		 4144#endif
4145
8bf50f71
MMOD		 4146 /* Disabling DMA prefetch and refetch for the P600.
4147 * An ASIC bug may result in accesses to invalid memory addresses.
4148 * We've disabled prefetch for some time now. Testing with XEN
4149 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 4150 */
4151 if(board_id == 0x3225103C) {
5e216153 4152 __u32 dma_prefetch;
8bf50f71 4153 __u32 dma_refetch;
f92e2f5f
MM		 4154 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
4155 dma_prefetch |= 0x8000;
4156 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 4157 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
4158 dma_refetch |= 0x1;
4159 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 4160 }
4161
1da177e4 4162#ifdef CCISS_DEBUG
5e216153 4163 printk(KERN_WARNING "Trying to put board into Performant mode\n");
7c832835 4164#endif /* CCISS_DEBUG */
b14aa6dc 4165 cciss_put_controller_into_performant_mode(c);
1da177e4
LT		 4166 return 0;
4167
5faad620 4168err_out_free_res:
872225ca
MM		 4169 /*
4170 * Deliberately omit pci_disable_device(): it does something nasty to
4171 * Smart Array controllers that pci_enable_device does not undo
4172 */
4e570309 4173 pci_release_regions(pdev);
c33ac89b 4174 return err;
1da177e4
LT		 4175}
4176
6ae5ce8e
MM		 4177/* Function to find the first free pointer into our hba[] array
4178 * Returns -1 if no free entries are left.
7c832835 4179 */
1da177e4
LT		 4180static int alloc_cciss_hba(void)
4181{
799202cb 4182 int i;
1da177e4 4183
7c832835 4184 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 4185 if (!hba[i]) {
4186 ctlr_info_t *p;
f2912a12 4187
06ff37ff 4188 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 4189 if (!p)
4190 goto Enomem;
1da177e4
LT		 4191 hba[i] = p;
4192 return i;
4193 }
4194 }
4195 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 4196 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 4197 return -1;
4198Enomem:
1da177e4 4199 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 4200 return -1;
4201}
4202
2c935593 4203static void free_hba(int n)
1da177e4 4204{
2c935593
SC		 4205 ctlr_info_t *h = hba[n];
4206 int i;
1da177e4 4207
2c935593
SC		 4208 hba[n] = NULL;
4209 for (i = 0; i < h->highest_lun + 1; i++)
4210 if (h->gendisk[i] != NULL)
4211 put_disk(h->gendisk[i]);
4212 kfree(h);
1da177e4
LT		 4213}
4214
82eb03cf
CC		 4215/* Send a message CDB to the firmware. */
4216static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
4217{
4218 typedef struct {
4219 CommandListHeader_struct CommandHeader;
4220 RequestBlock_struct Request;
4221 ErrDescriptor_struct ErrorDescriptor;
4222 } Command;
4223 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4224 Command *cmd;
4225 dma_addr_t paddr64;
4226 uint32_t paddr32, tag;
4227 void __iomem *vaddr;
4228 int i, err;
4229
4230 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4231 if (vaddr == NULL)
4232 return -ENOMEM;
4233
4234 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4235 CCISS commands, so they must be allocated from the lower 4GiB of
4236 memory. */
e930438c 4237 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 4238 if (err) {
4239 iounmap(vaddr);
4240 return -ENOMEM;
4241 }
4242
4243 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4244 if (cmd == NULL) {
4245 iounmap(vaddr);
4246 return -ENOMEM;
4247 }
4248
4249 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4250 although there's no guarantee, we assume that the address is at
4251 least 4-byte aligned (most likely, it's page-aligned). */
4252 paddr32 = paddr64;
4253
4254 cmd->CommandHeader.ReplyQueue = 0;
4255 cmd->CommandHeader.SGList = 0;
4256 cmd->CommandHeader.SGTotal = 0;
4257 cmd->CommandHeader.Tag.lower = paddr32;
4258 cmd->CommandHeader.Tag.upper = 0;
4259 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4260
4261 cmd->Request.CDBLen = 16;
4262 cmd->Request.Type.Type = TYPE_MSG;
4263 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4264 cmd->Request.Type.Direction = XFER_NONE;
4265 cmd->Request.Timeout = 0; /* Don't time out */
4266 cmd->Request.CDB[0] = opcode;
4267 cmd->Request.CDB[1] = type;
4268 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4269
4270 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4271 cmd->ErrorDescriptor.Addr.upper = 0;
4272 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4273
4274 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4275
4276 for (i = 0; i < 10; i++) {
4277 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4278 if ((tag & ~3) == paddr32)
4279 break;
4280 schedule_timeout_uninterruptible(HZ);
4281 }
4282
4283 iounmap(vaddr);
4284
4285 /* we leak the DMA buffer here ... no choice since the controller could
4286 still complete the command. */
4287 if (i == 10) {
4288 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4289 opcode, type);
4290 return -ETIMEDOUT;
4291 }
4292
4293 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4294
4295 if (tag & 2) {
4296 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4297 opcode, type);
4298 return -EIO;
4299 }
4300
4301 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4302 opcode, type);
4303 return 0;
4304}
4305
4306#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4307#define cciss_noop(p) cciss_message(p, 3, 0)
4308
4309static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4310{
4311/* the #defines are stolen from drivers/pci/msi.h. */
4312#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4313#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4314
4315 int pos;
4316 u16 control = 0;
4317
4318 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4319 if (pos) {
4320 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4321 if (control & PCI_MSI_FLAGS_ENABLE) {
4322 printk(KERN_INFO "cciss: resetting MSI\n");
4323 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4324 }
4325 }
4326
4327 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4328 if (pos) {
4329 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4330 if (control & PCI_MSIX_FLAGS_ENABLE) {
4331 printk(KERN_INFO "cciss: resetting MSI-X\n");
4332 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4333 }
4334 }
4335
4336 return 0;
4337}
4338
4339/* This does a hard reset of the controller using PCI power management
4340 * states. */
4341static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4342{
4343 u16 pmcsr, saved_config_space[32];
4344 int i, pos;
4345
4346 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4347
4348 /* This is very nearly the same thing as
4349
4350 pci_save_state(pci_dev);
4351 pci_set_power_state(pci_dev, PCI_D3hot);
4352 pci_set_power_state(pci_dev, PCI_D0);
4353 pci_restore_state(pci_dev);
4354
4355 but we can't use these nice canned kernel routines on
4356 kexec, because they also check the MSI/MSI-X state in PCI
4357 configuration space and do the wrong thing when it is
4358 set/cleared. Also, the pci_save/restore_state functions
4359 violate the ordering requirements for restoring the
4360 configuration space from the CCISS document (see the
4361 comment below). So we roll our own .... */
4362
4363 for (i = 0; i < 32; i++)
4364 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4365
4366 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4367 if (pos == 0) {
4368 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4369 return -ENODEV;
4370 }
4371
4372 /* Quoting from the Open CISS Specification: "The Power
4373 * Management Control/Status Register (CSR) controls the power
4374 * state of the device. The normal operating state is D0,
4375 * CSR=00h. The software off state is D3, CSR=03h. To reset
4376 * the controller, place the interface device in D3 then to
4377 * D0, this causes a secondary PCI reset which will reset the
4378 * controller." */
4379
4380 /* enter the D3hot power management state */
4381 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4382 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4383 pmcsr |= PCI_D3hot;
4384 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4385
4386 schedule_timeout_uninterruptible(HZ >> 1);
4387
4388 /* enter the D0 power management state */
4389 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4390 pmcsr |= PCI_D0;
4391 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4392
4393 schedule_timeout_uninterruptible(HZ >> 1);
4394
4395 /* Restore the PCI configuration space. The Open CISS
4396 * Specification says, "Restore the PCI Configuration
4397 * Registers, offsets 00h through 60h. It is important to
4398 * restore the command register, 16-bits at offset 04h,
4399 * last. Do not restore the configuration status register,
4400 * 16-bits at offset 06h." Note that the offset is 2*i. */
4401 for (i = 0; i < 32; i++) {
4402 if (i == 2 || i == 3)
4403 continue;
4404 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4405 }
4406 wmb();
4407 pci_write_config_word(pdev, 4, saved_config_space[2]);
4408
4409 return 0;
4410}
4411
1da177e4
LT		 4412/*
4413 * This is it. Find all the controllers and register them. I really hate
4414 * stealing all these major device numbers.
4415 * returns the number of block devices registered.
4416 */
4417static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4418 const struct pci_device_id *ent)
1da177e4 4419{
1da177e4 4420 int i;
799202cb 4421 int j = 0;
5c07a311 4422 int k = 0;
1da177e4 4423 int rc;
22bece00 4424 int dac, return_code;
212a5026 4425 InquiryData_struct *inq_buff;
1da177e4 4426
82eb03cf
CC		 4427 if (reset_devices) {
4428 /* Reset the controller with a PCI power-cycle */
4429 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4430 return -ENODEV;
4431
5e18cfd0
JA		 4432 /* Now try to get the controller to respond to a no-op. Some
4433 devices (notably the HP Smart Array 5i Controller) need
4434 up to 30 seconds to respond. */
5e4c91c8 4435 for (i=0; i<30; i++) {
82eb03cf
CC		 4436 if (cciss_noop(pdev) == 0)
4437 break;
5e4c91c8
JA		 4438
4439 schedule_timeout_uninterruptible(HZ);
4440 }
4441 if (i == 30) {
4442 printk(KERN_ERR "cciss: controller seems dead\n");
4443 return -EBUSY;
82eb03cf
CC		 4444 }
4445 }
4446
1da177e4 4447 i = alloc_cciss_hba();
7c832835 4448 if (i < 0)
e2019b58 4449 return -1;
1f8ef380 4450 hba[i]->busy_initializing = 1;
8a3173de
JA		 4451 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4452 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4453 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4454
1da177e4 4455 if (cciss_pci_init(hba[i], pdev) != 0)
2cfa948c 4456 goto clean_no_release_regions;
1da177e4
LT		 4457
4458 sprintf(hba[i]->devname, "cciss%d", i);
4459 hba[i]->ctlr = i;
4460 hba[i]->pdev = pdev;
4461
b368c9dd
AP		 4462 init_completion(&hba[i]->scan_wait);
4463
7fe06326
AP		 4464 if (cciss_create_hba_sysfs_entry(hba[i]))
4465 goto clean0;
4466
1da177e4 4467 /* configure PCI DMA stuff */
6a35528a 4468 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4469 dac = 1;
284901a9 4470 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4471 dac = 0;
1da177e4 4472 else {
40aabb58 4473 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4474 goto clean1;
4475 }
4476
4477 /*
4478 * register with the major number, or get a dynamic major number
4479 * by passing 0 as argument. This is done for greater than
4480 * 8 controller support.
4481 */
4482 if (i < MAX_CTLR_ORIG)
564de74a 4483 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4484 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4485 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4486 printk(KERN_ERR
7c832835
BH		 4487 "cciss: Unable to get major number %d for %s "
4488 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4489 goto clean1;
7c832835 4490 } else {
1da177e4
LT		 4491 if (i >= MAX_CTLR_ORIG)
4492 hba[i]->major = rc;
4493 }
4494
4495 /* make sure the board interrupts are off */
4496 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
0c2b3908 4497 if (hba[i]->msi_vector || hba[i]->msix_vector) {
256aea3f 4498 if (request_irq(hba[i]->intr[PERF_MODE_INT],
0c2b3908
MM		 4499 do_cciss_msix_intr,
4500 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4501 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
256aea3f 4502 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
0c2b3908
MM		 4503 goto clean2;
4504 }
4505 } else {
256aea3f 4506 if (request_irq(hba[i]->intr[PERF_MODE_INT], do_cciss_intx,
0c2b3908
MM		 4507 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4508 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
256aea3f 4509 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
0c2b3908
MM		 4510 goto clean2;
4511 }
1da177e4 4512 }
40aabb58
BH		 4513
4514 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835 4515 hba[i]->devname, pdev->device, pci_name(pdev),
5e216153 4516 hba[i]->intr[PERF_MODE_INT], dac ? "" : " not");
7c832835
BH		 4517
4518 hba[i]->cmd_pool_bits =
061837bc
JL		 4519 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4520 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4521 hba[i]->cmd_pool = (CommandList_struct *)
4522 pci_alloc_consistent(hba[i]->pdev,
f880632f 4523 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4524 &(hba[i]->cmd_pool_dhandle));
4525 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4526 pci_alloc_consistent(hba[i]->pdev,
f880632f 4527 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4528 &(hba[i]->errinfo_pool_dhandle));
4529 if ((hba[i]->cmd_pool_bits == NULL)
4530 || (hba[i]->cmd_pool == NULL)
4531 || (hba[i]->errinfo_pool == NULL)) {
4532 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4533 goto clean4;
4534 }
5c07a311
DB		 4535
4536 /* Need space for temp scatter list */
4537 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4538 sizeof(struct scatterlist *),
4539 GFP_KERNEL);
4540 for (k = 0; k < hba[i]->nr_cmds; k++) {
4541 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4542 hba[i]->maxsgentries,
4543 GFP_KERNEL);
4544 if (hba[i]->scatter_list[k] == NULL) {
4545 printk(KERN_ERR "cciss%d: could not allocate "
4546 "s/g lists\n", i);
4547 goto clean4;
4548 }
4549 }
49fc5601
SC		 4550 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
4551 hba[i]->chainsize, hba[i]->nr_cmds);
4552 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
5c07a311 4553 goto clean4;
5c07a311 4554
1da177e4 4555 spin_lock_init(&hba[i]->lock);
1da177e4 4556
7c832835
BH		 4557 /* Initialize the pdev driver private data.
4558 have it point to hba[i]. */
1da177e4 4559 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4560 /* command and error info recs zeroed out before
4561 they are used */
4562 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4563 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4564 * sizeof(unsigned long));
1da177e4 4565
6ae5ce8e
MM		 4566 hba[i]->num_luns = 0;
4567 hba[i]->highest_lun = -1;
4568 for (j = 0; j < CISS_MAX_LUN; j++) {
9cef0d2f 4569 hba[i]->drv[j] = NULL;
6ae5ce8e
MM		 4570 hba[i]->gendisk[j] = NULL;
4571 }
1da177e4
LT		 4572
4573 cciss_scsi_setup(i);
4574
4575 /* Turn the interrupts on so we can service requests */
4576 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4577
22bece00
MM		 4578 /* Get the firmware version */
4579 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4580 if (inq_buff == NULL) {
4581 printk(KERN_ERR "cciss: out of memory\n");
4582 goto clean4;
4583 }
4584
4585 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4586 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4587 if (return_code == IO_OK) {
4588 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4589 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4590 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4591 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4592 } else { /* send command failed */
4593 printk(KERN_WARNING "cciss: unable to determine firmware"
4594 " version of controller\n");
4595 }
212a5026 4596 kfree(inq_buff);
22bece00 4597
1da177e4 4598 cciss_procinit(i);
92c4231a 4599
5c07a311 4600 hba[i]->cciss_max_sectors = 8192;
92c4231a 4601
2d11d993 4602 rebuild_lun_table(hba[i], 1, 0);
d6dbf42e 4603 hba[i]->busy_initializing = 0;
e2019b58 4604 return 1;
1da177e4 4605
6ae5ce8e 4606clean4:
6044ec88 4607 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4608 /* Free up sg elements */
4609 for (k = 0; k < hba[i]->nr_cmds; k++)
4610 kfree(hba[i]->scatter_list[k]);
4611 kfree(hba[i]->scatter_list);
49fc5601 4612 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
7c832835 4613 if (hba[i]->cmd_pool)
1da177e4 4614 pci_free_consistent(hba[i]->pdev,
f880632f 4615 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4616 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4617 if (hba[i]->errinfo_pool)
1da177e4 4618 pci_free_consistent(hba[i]->pdev,
f880632f 4619 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4620 hba[i]->errinfo_pool,
4621 hba[i]->errinfo_pool_dhandle);
5e216153 4622 free_irq(hba[i]->intr[PERF_MODE_INT], hba[i]);
6ae5ce8e 4623clean2:
1da177e4 4624 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4625clean1:
7fe06326
AP		 4626 cciss_destroy_hba_sysfs_entry(hba[i]);
4627clean0:
2cfa948c
SC		 4628 pci_release_regions(pdev);
4629clean_no_release_regions:
1f8ef380 4630 hba[i]->busy_initializing = 0;
9cef0d2f 4631
872225ca
MM		 4632 /*
4633 * Deliberately omit pci_disable_device(): it does something nasty to
4634 * Smart Array controllers that pci_enable_device does not undo
4635 */
799202cb 4636 pci_set_drvdata(pdev, NULL);
61808c2b 4637 free_hba(i);
e2019b58 4638 return -1;
1da177e4
LT		 4639}
4640
e9ca75b5 4641static void cciss_shutdown(struct pci_dev *pdev)
1da177e4 4642{
29009a03
SC		 4643 ctlr_info_t *h;
4644 char *flush_buf;
7c832835 4645 int return_code;
1da177e4 4646
29009a03
SC		 4647 h = pci_get_drvdata(pdev);
4648 flush_buf = kzalloc(4, GFP_KERNEL);
4649 if (!flush_buf) {
4650 printk(KERN_WARNING
4651 "cciss:%d cache not flushed, out of memory.\n",
4652 h->ctlr);
e9ca75b5 4653 return;
e9ca75b5 4654 }
29009a03
SC		 4655 /* write all data in the battery backed cache to disk */
4656 memset(flush_buf, 0, 4);
4657 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4658 4, 0, CTLR_LUNID, TYPE_CMD);
4659 kfree(flush_buf);
4660 if (return_code != IO_OK)
4661 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4662 h->ctlr);
4663 h->access.set_intr_mask(h, CCISS_INTR_OFF);
5e216153 4664 free_irq(h->intr[PERF_MODE_INT], h);
e9ca75b5
GB		 4665}
4666
4667static void __devexit cciss_remove_one(struct pci_dev *pdev)
4668{
4669 ctlr_info_t *tmp_ptr;
4670 int i, j;
4671
7c832835
BH		 4672 if (pci_get_drvdata(pdev) == NULL) {
4673 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4674 return;
4675 }
0a9279cc 4676
1da177e4
LT		 4677 tmp_ptr = pci_get_drvdata(pdev);
4678 i = tmp_ptr->ctlr;
7c832835 4679 if (hba[i] == NULL) {
1da177e4 4680 printk(KERN_ERR "cciss: device appears to "
7c832835 4681 "already be removed \n");
1da177e4
LT		 4682 return;
4683 }
b6550777 4684
b368c9dd 4685 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4686
b368c9dd 4687 remove_from_scan_list(hba[i]);
b6550777
BH		 4688 remove_proc_entry(hba[i]->devname, proc_cciss);
4689 unregister_blkdev(hba[i]->major, hba[i]->devname);
4690
4691 /* remove it from the disk list */
4692 for (j = 0; j < CISS_MAX_LUN; j++) {
4693 struct gendisk *disk = hba[i]->gendisk[j];
4694 if (disk) {
165125e1 4695 struct request_queue *q = disk->queue;
b6550777 4696
097d0264 4697 if (disk->flags & GENHD_FL_UP) {
8ce51966 4698 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4699 del_gendisk(disk);
097d0264 4700 }
b6550777
BH		 4701 if (q)
4702 blk_cleanup_queue(q);
4703 }
4704 }
4705
ba198efb 4706#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4707 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4708#endif
b6550777 4709
e9ca75b5 4710 cciss_shutdown(pdev);
fb86a35b
MM		 4711
4712#ifdef CONFIG_PCI_MSI
7c832835
BH		 4713 if (hba[i]->msix_vector)
4714 pci_disable_msix(hba[i]->pdev);
4715 else if (hba[i]->msi_vector)
4716 pci_disable_msi(hba[i]->pdev);
4717#endif /* CONFIG_PCI_MSI */
fb86a35b 4718
1da177e4 4719 iounmap(hba[i]->vaddr);
1da177e4 4720
f880632f 4721 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4722 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4723 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4724 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4725 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4726 /* Free up sg elements */
4727 for (j = 0; j < hba[i]->nr_cmds; j++)
4728 kfree(hba[i]->scatter_list[j]);
4729 kfree(hba[i]->scatter_list);
49fc5601 4730 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
872225ca
MM		 4731 /*
4732 * Deliberately omit pci_disable_device(): it does something nasty to
4733 * Smart Array controllers that pci_enable_device does not undo
4734 */
7c832835 4735 pci_release_regions(pdev);
4e570309 4736 pci_set_drvdata(pdev, NULL);
7fe06326 4737 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4738 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4739 free_hba(i);
7c832835 4740}
1da177e4
LT		 4741
4742static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4743 .name = "cciss",
4744 .probe = cciss_init_one,
4745 .remove = __devexit_p(cciss_remove_one),
4746 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4747 .shutdown = cciss_shutdown,
1da177e4
LT		 4748};
4749
4750/*
4751 * This is it. Register the PCI driver information for the cards we control
7c832835 4752 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4753 */
4754static int __init cciss_init(void)
4755{
7fe06326
AP		 4756 int err;
4757
10cbda97
JA		 4758 /*
4759 * The hardware requires that commands are aligned on a 64-bit
4760 * boundary. Given that we use pci_alloc_consistent() to allocate an
4761 * array of them, the size must be a multiple of 8 bytes.
4762 */
1b7d0d28 4763 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
1da177e4
LT		 4764 printk(KERN_INFO DRIVER_NAME "\n");
4765
7fe06326
AP		 4766 err = bus_register(&cciss_bus_type);
4767 if (err)
4768 return err;
4769
b368c9dd
AP		 4770 /* Start the scan thread */
4771 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4772 if (IS_ERR(cciss_scan_thread)) {
4773 err = PTR_ERR(cciss_scan_thread);
4774 goto err_bus_unregister;
4775 }
4776
1da177e4 4777 /* Register for our PCI devices */
7fe06326
AP		 4778 err = pci_register_driver(&cciss_pci_driver);
4779 if (err)
b368c9dd 4780 goto err_thread_stop;
7fe06326 4781
617e1344 4782 return err;
7fe06326 4783
b368c9dd
AP		 4784err_thread_stop:
4785 kthread_stop(cciss_scan_thread);
4786err_bus_unregister:
7fe06326 4787 bus_unregister(&cciss_bus_type);
b368c9dd 4788
7fe06326 4789 return err;
1da177e4
LT		 4790}
4791
4792static void __exit cciss_cleanup(void)
4793{
4794 int i;
4795
4796 pci_unregister_driver(&cciss_pci_driver);
4797 /* double check that all controller entrys have been removed */
7c832835
BH		 4798 for (i = 0; i < MAX_CTLR; i++) {
4799 if (hba[i] != NULL) {
1da177e4 4800 printk(KERN_WARNING "cciss: had to remove"
7c832835 4801 " controller %d\n", i);
1da177e4
LT		 4802 cciss_remove_one(hba[i]->pdev);
4803 }
4804 }
b368c9dd 4805 kthread_stop(cciss_scan_thread);
928b4d8c 4806 remove_proc_entry("driver/cciss", NULL);
7fe06326 4807 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4808}
4809
4810module_init(cciss_init);
4811module_exit(cciss_cleanup);
Linux kernel - Deliverables
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