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block: push down BKL into .locked_ioctl
[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);
8a6cfeb6
AB		 182static int do_ioctl(struct block_device *bdev, fmode_t mode,
183 unsigned int cmd, unsigned long arg);
ef7822c2 184static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 185 unsigned int cmd, unsigned long arg);
a885c8c4 186static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 187
1da177e4 188static int cciss_revalidate(struct gendisk *disk);
2d11d993 189static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 190static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 191 int clear_all, int via_ioctl);
1da177e4 192
7b838bde 193static void cciss_read_capacity(int ctlr, int logvol,
00988a35 194 sector_t *total_size, unsigned int *block_size);
7b838bde 195static void cciss_read_capacity_16(int ctlr, int logvol,
00988a35
MMOD		 196 sector_t *total_size, unsigned int *block_size);
197static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 198 sector_t total_size,
00988a35 199 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 200 drive_info_struct *drv);
7c832835
BH		 201static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
202 __u32);
203static void start_io(ctlr_info_t *h);
7c832835 204static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 205 __u8 page_code, unsigned char scsi3addr[],
206 int cmd_type);
85cc61ae 207static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
208 int attempt_retry);
209static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 210
d6f4965d 211static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 212static int scan_thread(void *data);
213static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 214static void cciss_hba_release(struct device *dev);
215static void cciss_device_release(struct device *dev);
361e9b07 216static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
9cef0d2f 217static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
29979a71 218static inline u32 next_command(ctlr_info_t *h);
33079b21 219
5e216153
MM		 220/* performant mode helper functions */
221static void calc_bucket_map(int *bucket, int num_buckets, int nsgs,
222 int *bucket_map);
223static void cciss_put_controller_into_performant_mode(ctlr_info_t *h);
224
1da177e4 225#ifdef CONFIG_PROC_FS
1da177e4
LT		 226static void cciss_procinit(int i);
227#else
7c832835
BH		 228static void cciss_procinit(int i)
229{
230}
231#endif /* CONFIG_PROC_FS */
1da177e4
LT		 232
233#ifdef CONFIG_COMPAT
ef7822c2
AV		 234static int cciss_compat_ioctl(struct block_device *, fmode_t,
235 unsigned, unsigned long);
1da177e4
LT		 236#endif
237
83d5cde4 238static const struct block_device_operations cciss_fops = {
7c832835 239 .owner = THIS_MODULE,
ef7822c2
AV		 240 .open = cciss_open,
241 .release = cciss_release,
8a6cfeb6 242 .ioctl = do_ioctl,
7c832835 243 .getgeo = cciss_getgeo,
1da177e4 244#ifdef CONFIG_COMPAT
ef7822c2 245 .compat_ioctl = cciss_compat_ioctl,
1da177e4 246#endif
7c832835 247 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 248};
249
5e216153
MM		 250/* set_performant_mode: Modify the tag for cciss performant
251 * set bit 0 for pull model, bits 3-1 for block fetch
252 * register number
253 */
254static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
255{
256 if (likely(h->transMethod == CFGTBL_Trans_Performant))
257 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
258}
259
1da177e4
LT		 260/*
261 * Enqueuing and dequeuing functions for cmdlists.
262 */
8a3173de 263static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 264{
8a3173de 265 hlist_add_head(&c->list, list);
1da177e4
LT		 266}
267
8a3173de 268static inline void removeQ(CommandList_struct *c)
1da177e4 269{
b59e64d0
HR		 270 /*
271 * After kexec/dump some commands might still
272 * be in flight, which the firmware will try
273 * to complete. Resetting the firmware doesn't work
274 * with old fw revisions, so we have to mark
275 * them off as 'stale' to prevent the driver from
276 * falling over.
277 */
278 if (WARN_ON(hlist_unhashed(&c->list))) {
279 c->cmd_type = CMD_MSG_STALE;
8a3173de 280 return;
b59e64d0 281 }
8a3173de
JA		 282
283 hlist_del_init(&c->list);
1da177e4
LT		 284}
285
664a717d
MM		 286static void enqueue_cmd_and_start_io(ctlr_info_t *h,
287 CommandList_struct *c)
288{
289 unsigned long flags;
5e216153 290 set_performant_mode(h, c);
664a717d
MM		 291 spin_lock_irqsave(&h->lock, flags);
292 addQ(&h->reqQ, c);
293 h->Qdepth++;
294 start_io(h);
295 spin_unlock_irqrestore(&h->lock, flags);
296}
297
dccc9b56 298static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
49fc5601
SC		 299 int nr_cmds)
300{
301 int i;
302
303 if (!cmd_sg_list)
304 return;
305 for (i = 0; i < nr_cmds; i++) {
dccc9b56
SC		 306 kfree(cmd_sg_list[i]);
307 cmd_sg_list[i] = NULL;
49fc5601
SC		 308 }
309 kfree(cmd_sg_list);
310}
311
dccc9b56
SC		 312static SGDescriptor_struct **cciss_allocate_sg_chain_blocks(
313 ctlr_info_t *h, int chainsize, int nr_cmds)
49fc5601
SC		 314{
315 int j;
dccc9b56 316 SGDescriptor_struct **cmd_sg_list;
49fc5601
SC		 317
318 if (chainsize <= 0)
319 return NULL;
320
321 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
322 if (!cmd_sg_list)
323 return NULL;
324
325 /* Build up chain blocks for each command */
326 for (j = 0; j < nr_cmds; j++) {
49fc5601 327 /* Need a block of chainsized s/g elements. */
dccc9b56
SC		 328 cmd_sg_list[j] = kmalloc((chainsize *
329 sizeof(*cmd_sg_list[j])), GFP_KERNEL);
330 if (!cmd_sg_list[j]) {
49fc5601
SC		 331 dev_err(&h->pdev->dev, "Cannot get memory "
332 "for s/g chains.\n");
333 goto clean;
334 }
335 }
336 return cmd_sg_list;
337clean:
338 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
339 return NULL;
340}
341
d45033ef
SC		 342static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c)
343{
344 SGDescriptor_struct *chain_sg;
345 u64bit temp64;
346
347 if (c->Header.SGTotal <= h->max_cmd_sgentries)
348 return;
349
350 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
351 temp64.val32.lower = chain_sg->Addr.lower;
352 temp64.val32.upper = chain_sg->Addr.upper;
353 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
354}
355
356static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c,
357 SGDescriptor_struct *chain_block, int len)
358{
359 SGDescriptor_struct *chain_sg;
360 u64bit temp64;
361
362 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
363 chain_sg->Ext = CCISS_SG_CHAIN;
364 chain_sg->Len = len;
365 temp64.val = pci_map_single(h->pdev, chain_block, len,
366 PCI_DMA_TODEVICE);
367 chain_sg->Addr.lower = temp64.val32.lower;
368 chain_sg->Addr.upper = temp64.val32.upper;
369}
370
1da177e4
LT		 371#include "cciss_scsi.c" /* For SCSI tape support */
372
1e6f2dc1
AB		 373static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
374 "UNKNOWN"
375};
376#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
0f5486ec 377
1da177e4
LT		 378#ifdef CONFIG_PROC_FS
379
380/*
381 * Report information about this controller.
382 */
383#define ENG_GIG 1000000000
384#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 385#define ENGAGE_SCSI "engage scsi"
1da177e4
LT		 386
387static struct proc_dir_entry *proc_cciss;
388
89b6e743 389static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 390{
89b6e743
MM		 391 ctlr_info_t *h = seq->private;
392
393 seq_printf(seq, "%s: HP %s Controller\n"
394 "Board ID: 0x%08lx\n"
395 "Firmware Version: %c%c%c%c\n"
396 "IRQ: %d\n"
397 "Logical drives: %d\n"
398 "Current Q depth: %d\n"
399 "Current # commands on controller: %d\n"
400 "Max Q depth since init: %d\n"
401 "Max # commands on controller since init: %d\n"
402 "Max SG entries since init: %d\n",
403 h->devname,
404 h->product_name,
405 (unsigned long)h->board_id,
406 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
5e216153 407 h->firm_ver[3], (unsigned int)h->intr[PERF_MODE_INT],
89b6e743
MM		 408 h->num_luns,
409 h->Qdepth, h->commands_outstanding,
410 h->maxQsinceinit, h->max_outstanding, h->maxSG);
411
412#ifdef CONFIG_CISS_SCSI_TAPE
413 cciss_seq_tape_report(seq, h->ctlr);
414#endif /* CONFIG_CISS_SCSI_TAPE */
415}
1da177e4 416
89b6e743
MM		 417static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
418{
419 ctlr_info_t *h = seq->private;
420 unsigned ctlr = h->ctlr;
421 unsigned long flags;
1da177e4
LT		 422
423 /* prevent displaying bogus info during configuration
424 * or deconfiguration of a logical volume
425 */
426 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
427 if (h->busy_configuring) {
428 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 429 return ERR_PTR(-EBUSY);
1da177e4
LT		 430 }
431 h->busy_configuring = 1;
432 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
433
89b6e743
MM		 434 if (*pos == 0)
435 cciss_seq_show_header(seq);
436
437 return pos;
438}
439
440static int cciss_seq_show(struct seq_file *seq, void *v)
441{
442 sector_t vol_sz, vol_sz_frac;
443 ctlr_info_t *h = seq->private;
444 unsigned ctlr = h->ctlr;
445 loff_t *pos = v;
9cef0d2f 446 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 447
448 if (*pos > h->highest_lun)
449 return 0;
450
531c2dc7
SC		 451 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
452 return 0;
453
89b6e743
MM		 454 if (drv->heads == 0)
455 return 0;
456
457 vol_sz = drv->nr_blocks;
458 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
459 vol_sz_frac *= 100;
460 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
461
fa52bec9 462 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 463 drv->raid_level = RAID_UNKNOWN;
464 seq_printf(seq, "cciss/c%dd%d:"
465 "\t%4u.%02uGB\tRAID %s\n",
466 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
467 raid_label[drv->raid_level]);
468 return 0;
469}
470
471static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
472{
473 ctlr_info_t *h = seq->private;
474
475 if (*pos > h->highest_lun)
476 return NULL;
477 *pos += 1;
478
479 return pos;
480}
481
482static void cciss_seq_stop(struct seq_file *seq, void *v)
483{
484 ctlr_info_t *h = seq->private;
485
486 /* Only reset h->busy_configuring if we succeeded in setting
487 * it during cciss_seq_start. */
488 if (v == ERR_PTR(-EBUSY))
489 return;
7c832835 490
1da177e4 491 h->busy_configuring = 0;
1da177e4
LT		 492}
493
88e9d34c 494static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 495 .start = cciss_seq_start,
496 .show = cciss_seq_show,
497 .next = cciss_seq_next,
498 .stop = cciss_seq_stop,
499};
500
501static int cciss_seq_open(struct inode *inode, struct file *file)
502{
503 int ret = seq_open(file, &cciss_seq_ops);
504 struct seq_file *seq = file->private_data;
505
506 if (!ret)
507 seq->private = PDE(inode)->data;
508
509 return ret;
510}
511
512static ssize_t
513cciss_proc_write(struct file *file, const char __user *buf,
514 size_t length, loff_t *ppos)
1da177e4 515{
89b6e743
MM		 516 int err;
517 char *buffer;
518
519#ifndef CONFIG_CISS_SCSI_TAPE
520 return -EINVAL;
1da177e4
LT		 521#endif
522
89b6e743 523 if (!buf || length > PAGE_SIZE - 1)
7c832835 524 return -EINVAL;
89b6e743
MM		 525
526 buffer = (char *)__get_free_page(GFP_KERNEL);
527 if (!buffer)
528 return -ENOMEM;
529
530 err = -EFAULT;
531 if (copy_from_user(buffer, buf, length))
532 goto out;
533 buffer[length] = '\0';
534
535#ifdef CONFIG_CISS_SCSI_TAPE
536 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
537 struct seq_file *seq = file->private_data;
538 ctlr_info_t *h = seq->private;
89b6e743 539
8721c81f
SC		 540 err = cciss_engage_scsi(h->ctlr);
541 if (err == 0)
89b6e743
MM		 542 err = length;
543 } else
544#endif /* CONFIG_CISS_SCSI_TAPE */
545 err = -EINVAL;
7c832835
BH		 546 /* might be nice to have "disengage" too, but it's not
547 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 548
549out:
550 free_page((unsigned long)buffer);
551 return err;
1da177e4
LT		 552}
553
828c0950 554static const struct file_operations cciss_proc_fops = {
89b6e743
MM		 555 .owner = THIS_MODULE,
556 .open = cciss_seq_open,
557 .read = seq_read,
558 .llseek = seq_lseek,
559 .release = seq_release,
560 .write = cciss_proc_write,
561};
562
1da177e4
LT		 563static void __devinit cciss_procinit(int i)
564{
565 struct proc_dir_entry *pde;
566
89b6e743 567 if (proc_cciss == NULL)
928b4d8c 568 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 569 if (!proc_cciss)
570 return;
3dfcf9c4 571 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 572 S_IROTH, proc_cciss,
3dfcf9c4 573 &cciss_proc_fops, hba[i]);
1da177e4 574}
7c832835 575#endif /* CONFIG_PROC_FS */
1da177e4 576
7fe06326
AP		 577#define MAX_PRODUCT_NAME_LEN 19
578
579#define to_hba(n) container_of(n, struct ctlr_info, dev)
580#define to_drv(n) container_of(n, drive_info_struct, dev)
581
d6f4965d
AP		 582static ssize_t host_store_rescan(struct device *dev,
583 struct device_attribute *attr,
584 const char *buf, size_t count)
585{
586 struct ctlr_info *h = to_hba(dev);
587
588 add_to_scan_list(h);
589 wake_up_process(cciss_scan_thread);
590 wait_for_completion_interruptible(&h->scan_wait);
591
592 return count;
593}
8ba95c69 594static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 595
596static ssize_t dev_show_unique_id(struct device *dev,
597 struct device_attribute *attr,
598 char *buf)
599{
600 drive_info_struct *drv = to_drv(dev);
601 struct ctlr_info *h = to_hba(drv->dev.parent);
602 __u8 sn[16];
603 unsigned long flags;
604 int ret = 0;
605
606 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
607 if (h->busy_configuring)
608 ret = -EBUSY;
609 else
610 memcpy(sn, drv->serial_no, sizeof(sn));
611 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
612
613 if (ret)
614 return ret;
615 else
616 return snprintf(buf, 16 * 2 + 2,
617 "%02X%02X%02X%02X%02X%02X%02X%02X"
618 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
619 sn[0], sn[1], sn[2], sn[3],
620 sn[4], sn[5], sn[6], sn[7],
621 sn[8], sn[9], sn[10], sn[11],
622 sn[12], sn[13], sn[14], sn[15]);
623}
8ba95c69 624static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP		 625
626static ssize_t dev_show_vendor(struct device *dev,
627 struct device_attribute *attr,
628 char *buf)
629{
630 drive_info_struct *drv = to_drv(dev);
631 struct ctlr_info *h = to_hba(drv->dev.parent);
632 char vendor[VENDOR_LEN + 1];
633 unsigned long flags;
634 int ret = 0;
635
636 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
637 if (h->busy_configuring)
638 ret = -EBUSY;
639 else
640 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
641 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
642
643 if (ret)
644 return ret;
645 else
646 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
647}
8ba95c69 648static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP		 649
650static ssize_t dev_show_model(struct device *dev,
651 struct device_attribute *attr,
652 char *buf)
653{
654 drive_info_struct *drv = to_drv(dev);
655 struct ctlr_info *h = to_hba(drv->dev.parent);
656 char model[MODEL_LEN + 1];
657 unsigned long flags;
658 int ret = 0;
659
660 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
661 if (h->busy_configuring)
662 ret = -EBUSY;
663 else
664 memcpy(model, drv->model, MODEL_LEN + 1);
665 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
666
667 if (ret)
668 return ret;
669 else
670 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
671}
8ba95c69 672static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP		 673
674static ssize_t dev_show_rev(struct device *dev,
675 struct device_attribute *attr,
676 char *buf)
677{
678 drive_info_struct *drv = to_drv(dev);
679 struct ctlr_info *h = to_hba(drv->dev.parent);
680 char rev[REV_LEN + 1];
681 unsigned long flags;
682 int ret = 0;
683
684 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
685 if (h->busy_configuring)
686 ret = -EBUSY;
687 else
688 memcpy(rev, drv->rev, REV_LEN + 1);
689 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
690
691 if (ret)
692 return ret;
693 else
694 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
695}
8ba95c69 696static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 697
ce84a8ae
SC		 698static ssize_t cciss_show_lunid(struct device *dev,
699 struct device_attribute *attr, char *buf)
700{
9cef0d2f
SC		 701 drive_info_struct *drv = to_drv(dev);
702 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 703 unsigned long flags;
704 unsigned char lunid[8];
705
706 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
707 if (h->busy_configuring) {
708 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
709 return -EBUSY;
710 }
711 if (!drv->heads) {
712 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
713 return -ENOTTY;
714 }
715 memcpy(lunid, drv->LunID, sizeof(lunid));
716 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
717 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
718 lunid[0], lunid[1], lunid[2], lunid[3],
719 lunid[4], lunid[5], lunid[6], lunid[7]);
720}
8ba95c69 721static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 722
3ff1111d
SC		 723static ssize_t cciss_show_raid_level(struct device *dev,
724 struct device_attribute *attr, char *buf)
725{
9cef0d2f
SC		 726 drive_info_struct *drv = to_drv(dev);
727 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 728 int raid;
729 unsigned long flags;
730
731 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
732 if (h->busy_configuring) {
733 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
734 return -EBUSY;
735 }
736 raid = drv->raid_level;
737 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
738 if (raid < 0 || raid > RAID_UNKNOWN)
739 raid = RAID_UNKNOWN;
740
741 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
742 raid_label[raid]);
743}
8ba95c69 744static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 745
e272afec
SC		 746static ssize_t cciss_show_usage_count(struct device *dev,
747 struct device_attribute *attr, char *buf)
748{
9cef0d2f
SC		 749 drive_info_struct *drv = to_drv(dev);
750 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 751 unsigned long flags;
752 int count;
753
754 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
755 if (h->busy_configuring) {
756 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
757 return -EBUSY;
758 }
759 count = drv->usage_count;
760 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
761 return snprintf(buf, 20, "%d\n", count);
762}
8ba95c69 763static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 764
d6f4965d
AP		 765static struct attribute *cciss_host_attrs[] = {
766 &dev_attr_rescan.attr,
767 NULL
768};
769
770static struct attribute_group cciss_host_attr_group = {
771 .attrs = cciss_host_attrs,
772};
773
9f792d9f 774static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP		 775 &cciss_host_attr_group,
776 NULL
777};
778
779static struct device_type cciss_host_type = {
780 .name = "cciss_host",
781 .groups = cciss_host_attr_groups,
617e1344 782 .release = cciss_hba_release,
d6f4965d
AP		 783};
784
7fe06326
AP		 785static struct attribute *cciss_dev_attrs[] = {
786 &dev_attr_unique_id.attr,
787 &dev_attr_model.attr,
788 &dev_attr_vendor.attr,
789 &dev_attr_rev.attr,
ce84a8ae 790 &dev_attr_lunid.attr,
3ff1111d 791 &dev_attr_raid_level.attr,
e272afec 792 &dev_attr_usage_count.attr,
7fe06326
AP		 793 NULL
794};
795
796static struct attribute_group cciss_dev_attr_group = {
797 .attrs = cciss_dev_attrs,
798};
799
a4dbd674 800static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 801 &cciss_dev_attr_group,
802 NULL
803};
804
805static struct device_type cciss_dev_type = {
806 .name = "cciss_device",
807 .groups = cciss_dev_attr_groups,
617e1344 808 .release = cciss_device_release,
7fe06326
AP		 809};
810
811static struct bus_type cciss_bus_type = {
812 .name = "cciss",
813};
814
617e1344
SC		 815/*
816 * cciss_hba_release is called when the reference count
817 * of h->dev goes to zero.
818 */
819static void cciss_hba_release(struct device *dev)
820{
821 /*
822 * nothing to do, but need this to avoid a warning
823 * about not having a release handler from lib/kref.c.
824 */
825}
7fe06326
AP		 826
827/*
828 * Initialize sysfs entry for each controller. This sets up and registers
829 * the 'cciss#' directory for each individual controller under
830 * /sys/bus/pci/devices/<dev>/.
831 */
832static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
833{
834 device_initialize(&h->dev);
835 h->dev.type = &cciss_host_type;
836 h->dev.bus = &cciss_bus_type;
837 dev_set_name(&h->dev, "%s", h->devname);
838 h->dev.parent = &h->pdev->dev;
839
840 return device_add(&h->dev);
841}
842
843/*
844 * Remove sysfs entries for an hba.
845 */
846static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
847{
848 device_del(&h->dev);
617e1344
SC		 849 put_device(&h->dev); /* final put. */
850}
851
852/* cciss_device_release is called when the reference count
9cef0d2f 853 * of h->drv[x]dev goes to zero.
617e1344
SC		 854 */
855static void cciss_device_release(struct device *dev)
856{
9cef0d2f
SC		 857 drive_info_struct *drv = to_drv(dev);
858 kfree(drv);
7fe06326
AP		 859}
860
861/*
862 * Initialize sysfs for each logical drive. This sets up and registers
863 * the 'c#d#' directory for each individual logical drive under
864 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
865 * /sys/block/cciss!c#d# to this entry.
866 */
617e1344 867static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 868 int drv_index)
869{
617e1344
SC		 870 struct device *dev;
871
9cef0d2f 872 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 873 return 0;
874
9cef0d2f 875 dev = &h->drv[drv_index]->dev;
617e1344
SC		 876 device_initialize(dev);
877 dev->type = &cciss_dev_type;
878 dev->bus = &cciss_bus_type;
879 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
880 dev->parent = &h->dev;
9cef0d2f 881 h->drv[drv_index]->device_initialized = 1;
617e1344 882 return device_add(dev);
7fe06326
AP		 883}
884
885/*
886 * Remove sysfs entries for a logical drive.
887 */
8ce51966
SC		 888static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
889 int ctlr_exiting)
7fe06326 890{
9cef0d2f 891 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 892
893 /* special case for c*d0, we only destroy it on controller exit */
894 if (drv_index == 0 && !ctlr_exiting)
895 return;
896
617e1344
SC		 897 device_del(dev);
898 put_device(dev); /* the "final" put. */
9cef0d2f 899 h->drv[drv_index] = NULL;
7fe06326
AP		 900}
901
7c832835
BH		 902/*
903 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 904 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 905 * which ones are free or in use. For operations that can wait for kmalloc
906 * to possible sleep, this routine can be called with get_from_pool set to 0.
907 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
908 */
909static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 910{
911 CommandList_struct *c;
7c832835 912 int i;
1da177e4
LT		 913 u64bit temp64;
914 dma_addr_t cmd_dma_handle, err_dma_handle;
915
7c832835
BH		 916 if (!get_from_pool) {
917 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
918 sizeof(CommandList_struct), &cmd_dma_handle);
919 if (c == NULL)
920 return NULL;
1da177e4
LT		 921 memset(c, 0, sizeof(CommandList_struct));
922
33079b21
MM		 923 c->cmdindex = -1;
924
7c832835
BH		 925 c->err_info = (ErrorInfo_struct *)
926 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
927 &err_dma_handle);
928
929 if (c->err_info == NULL) {
930 pci_free_consistent(h->pdev,
1da177e4
LT		 931 sizeof(CommandList_struct), c, cmd_dma_handle);
932 return NULL;
933 }
934 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 935 } else { /* get it out of the controllers pool */
936
937 do {
f880632f
MM		 938 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
939 if (i == h->nr_cmds)
7c832835
BH		 940 return NULL;
941 } while (test_and_set_bit
942 (i & (BITS_PER_LONG - 1),
943 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 944#ifdef CCISS_DEBUG
945 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
946#endif
7c832835 947 c = h->cmd_pool + i;
1da177e4 948 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 949 cmd_dma_handle = h->cmd_pool_dhandle
950 + i * sizeof(CommandList_struct);
1da177e4
LT		 951 c->err_info = h->errinfo_pool + i;
952 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 953 err_dma_handle = h->errinfo_pool_dhandle
954 + i * sizeof(ErrorInfo_struct);
955 h->nr_allocs++;
33079b21
MM		 956
957 c->cmdindex = i;
7c832835 958 }
1da177e4 959
8a3173de 960 INIT_HLIST_NODE(&c->list);
1da177e4 961 c->busaddr = (__u32) cmd_dma_handle;
7c832835 962 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 963 c->ErrDesc.Addr.lower = temp64.val32.lower;
964 c->ErrDesc.Addr.upper = temp64.val32.upper;
965 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 966
7c832835
BH		 967 c->ctlr = h->ctlr;
968 return c;
1da177e4
LT		 969}
970
7c832835
BH		 971/*
972 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 973 */
974static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
975{
976 int i;
977 u64bit temp64;
978
7c832835 979 if (!got_from_pool) {
1da177e4
LT		 980 temp64.val32.lower = c->ErrDesc.Addr.lower;
981 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 982 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
983 c->err_info, (dma_addr_t) temp64.val);
984 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
985 c, (dma_addr_t) c->busaddr);
986 } else {
1da177e4 987 i = c - h->cmd_pool;
7c832835
BH		 988 clear_bit(i & (BITS_PER_LONG - 1),
989 h->cmd_pool_bits + (i / BITS_PER_LONG));
990 h->nr_frees++;
991 }
1da177e4
LT		 992}
993
994static inline ctlr_info_t *get_host(struct gendisk *disk)
995{
7c832835 996 return disk->queue->queuedata;
1da177e4
LT		 997}
998
999static inline drive_info_struct *get_drv(struct gendisk *disk)
1000{
1001 return disk->private_data;
1002}
1003
1004/*
1005 * Open. Make sure the device is really there.
1006 */
ef7822c2 1007static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 1008{
ef7822c2
AV		 1009 ctlr_info_t *host = get_host(bdev->bd_disk);
1010 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 1011
1012#ifdef CCISS_DEBUG
ef7822c2 1013 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 1014#endif /* CCISS_DEBUG */
1da177e4 1015
2e043986 1016 if (drv->busy_configuring)
ddd47442 1017 return -EBUSY;
1da177e4
LT		 1018 /*
1019 * Root is allowed to open raw volume zero even if it's not configured
1020 * so array config can still work. Root is also allowed to open any
1021 * volume that has a LUN ID, so it can issue IOCTL to reread the
1022 * disk information. I don't think I really like this
1023 * but I'm already using way to many device nodes to claim another one
1024 * for "raw controller".
1025 */
7a06f789 1026 if (drv->heads == 0) {
ef7822c2 1027 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 1028 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 1029 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 1030 return -ENXIO;
1da177e4 1031 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 1032 } else if (memcmp(drv->LunID, CTLR_LUNID,
1033 sizeof(drv->LunID))) {
1da177e4
LT		 1034 return -ENXIO;
1035 }
1036 }
1037 if (!capable(CAP_SYS_ADMIN))
1038 return -EPERM;
1039 }
1040 drv->usage_count++;
1041 host->usage_count++;
1042 return 0;
1043}
7c832835 1044
1da177e4
LT		 1045/*
1046 * Close. Sync first.
1047 */
ef7822c2 1048static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 1049{
ef7822c2
AV		 1050 ctlr_info_t *host = get_host(disk);
1051 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 1052
1053#ifdef CCISS_DEBUG
ef7822c2 1054 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 1055#endif /* CCISS_DEBUG */
1da177e4
LT		 1056
1057 drv->usage_count--;
1058 host->usage_count--;
1059 return 0;
1060}
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
8a6cfeb6
AB		 1072#ifdef CONFIG_COMPAT
1073
ef7822c2
AV		 1074static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1075 unsigned cmd, unsigned long arg);
1076static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1077 unsigned cmd, unsigned long arg);
1da177e4 1078
ef7822c2
AV		 1079static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1080 unsigned cmd, unsigned long arg)
1da177e4
LT		 1081{
1082 switch (cmd) {
1083 case CCISS_GETPCIINFO:
1084 case CCISS_GETINTINFO:
1085 case CCISS_SETINTINFO:
1086 case CCISS_GETNODENAME:
1087 case CCISS_SETNODENAME:
1088 case CCISS_GETHEARTBEAT:
1089 case CCISS_GETBUSTYPES:
1090 case CCISS_GETFIRMVER:
1091 case CCISS_GETDRIVVER:
1092 case CCISS_REVALIDVOLS:
1093 case CCISS_DEREGDISK:
1094 case CCISS_REGNEWDISK:
1095 case CCISS_REGNEWD:
1096 case CCISS_RESCANDISK:
1097 case CCISS_GETLUNINFO:
ef7822c2 1098 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1099
1100 case CCISS_PASSTHRU32:
ef7822c2 1101 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 1102 case CCISS_BIG_PASSTHRU32:
ef7822c2 1103 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 1104
1105 default:
1106 return -ENOIOCTLCMD;
1107 }
1108}
1109
ef7822c2
AV		 1110static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1111 unsigned cmd, unsigned long arg)
1da177e4
LT		 1112{
1113 IOCTL32_Command_struct __user *arg32 =
7c832835 1114 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1115 IOCTL_Command_struct arg64;
1116 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1117 int err;
1118 u32 cp;
1119
1120 err = 0;
7c832835
BH		 1121 err |=
1122 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1123 sizeof(arg64.LUN_info));
1124 err |=
1125 copy_from_user(&arg64.Request, &arg32->Request,
1126 sizeof(arg64.Request));
1127 err |=
1128 copy_from_user(&arg64.error_info, &arg32->error_info,
1129 sizeof(arg64.error_info));
1da177e4
LT		 1130 err |= get_user(arg64.buf_size, &arg32->buf_size);
1131 err |= get_user(cp, &arg32->buf);
1132 arg64.buf = compat_ptr(cp);
1133 err |= copy_to_user(p, &arg64, sizeof(arg64));
1134
1135 if (err)
1136 return -EFAULT;
1137
ef7822c2 1138 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1139 if (err)
1140 return err;
7c832835
BH		 1141 err |=
1142 copy_in_user(&arg32->error_info, &p->error_info,
1143 sizeof(arg32->error_info));
1da177e4
LT		 1144 if (err)
1145 return -EFAULT;
1146 return err;
1147}
1148
ef7822c2
AV		 1149static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1150 unsigned cmd, unsigned long arg)
1da177e4
LT		 1151{
1152 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1153 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1154 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1155 BIG_IOCTL_Command_struct __user *p =
1156 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1157 int err;
1158 u32 cp;
1159
1160 err = 0;
7c832835
BH		 1161 err |=
1162 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1163 sizeof(arg64.LUN_info));
1164 err |=
1165 copy_from_user(&arg64.Request, &arg32->Request,
1166 sizeof(arg64.Request));
1167 err |=
1168 copy_from_user(&arg64.error_info, &arg32->error_info,
1169 sizeof(arg64.error_info));
1da177e4
LT		 1170 err |= get_user(arg64.buf_size, &arg32->buf_size);
1171 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1172 err |= get_user(cp, &arg32->buf);
1173 arg64.buf = compat_ptr(cp);
1174 err |= copy_to_user(p, &arg64, sizeof(arg64));
1175
1176 if (err)
7c832835 1177 return -EFAULT;
1da177e4 1178
ef7822c2 1179 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1180 if (err)
1181 return err;
7c832835
BH		 1182 err |=
1183 copy_in_user(&arg32->error_info, &p->error_info,
1184 sizeof(arg32->error_info));
1da177e4
LT		 1185 if (err)
1186 return -EFAULT;
1187 return err;
1188}
1189#endif
a885c8c4
CH		 1190
1191static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1192{
1193 drive_info_struct *drv = get_drv(bdev->bd_disk);
1194
1195 if (!drv->cylinders)
1196 return -ENXIO;
1197
1198 geo->heads = drv->heads;
1199 geo->sectors = drv->sectors;
1200 geo->cylinders = drv->cylinders;
1201 return 0;
1202}
1203
0a9279cc
MM		 1204static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1205{
1206 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1207 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1208 (void)check_for_unit_attention(host, c);
1209}
1da177e4 1210/*
7c832835 1211 * ioctl
1da177e4 1212 */
ef7822c2 1213static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1214 unsigned int cmd, unsigned long arg)
1da177e4 1215{
1da177e4
LT		 1216 struct gendisk *disk = bdev->bd_disk;
1217 ctlr_info_t *host = get_host(disk);
1218 drive_info_struct *drv = get_drv(disk);
1219 int ctlr = host->ctlr;
1220 void __user *argp = (void __user *)arg;
1221
1222#ifdef CCISS_DEBUG
1223 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1224#endif /* CCISS_DEBUG */
1225
1226 switch (cmd) {
1da177e4 1227 case CCISS_GETPCIINFO:
7c832835
BH		 1228 {
1229 cciss_pci_info_struct pciinfo;
1230
1231 if (!arg)
1232 return -EINVAL;
1233 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1234 pciinfo.bus = host->pdev->bus->number;
1235 pciinfo.dev_fn = host->pdev->devfn;
1236 pciinfo.board_id = host->board_id;
1237 if (copy_to_user
1238 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1239 return -EFAULT;
1240 return 0;
1241 }
1da177e4 1242 case CCISS_GETINTINFO:
7c832835
BH		 1243 {
1244 cciss_coalint_struct intinfo;
1245 if (!arg)
1246 return -EINVAL;
1247 intinfo.delay =
1248 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1249 intinfo.count =
1250 readl(&host->cfgtable->HostWrite.CoalIntCount);
1251 if (copy_to_user
1252 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1253 return -EFAULT;
1254 return 0;
1255 }
1da177e4 1256 case CCISS_SETINTINFO:
1da177e4 1257 {
7c832835
BH		 1258 cciss_coalint_struct intinfo;
1259 unsigned long flags;
1260 int i;
1261
1262 if (!arg)
1263 return -EINVAL;
1264 if (!capable(CAP_SYS_ADMIN))
1265 return -EPERM;
1266 if (copy_from_user
1267 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1268 return -EFAULT;
1269 if ((intinfo.delay == 0) && (intinfo.count == 0))
1270 {
1271// printk("cciss_ioctl: delay and count cannot be 0\n");
1272 return -EINVAL;
1273 }
1274 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1275 /* Update the field, and then ring the doorbell */
1276 writel(intinfo.delay,
1277 &(host->cfgtable->HostWrite.CoalIntDelay));
1278 writel(intinfo.count,
1279 &(host->cfgtable->HostWrite.CoalIntCount));
1280 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1281
1282 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1283 if (!(readl(host->vaddr + SA5_DOORBELL)
1284 & CFGTBL_ChangeReq))
1285 break;
1286 /* delay and try again */
1287 udelay(1000);
1288 }
1289 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1290 if (i >= MAX_IOCTL_CONFIG_WAIT)
1291 return -EAGAIN;
1292 return 0;
1da177e4 1293 }
1da177e4 1294 case CCISS_GETNODENAME:
7c832835
BH		 1295 {
1296 NodeName_type NodeName;
1297 int i;
1298
1299 if (!arg)
1300 return -EINVAL;
1301 for (i = 0; i < 16; i++)
1302 NodeName[i] =
1303 readb(&host->cfgtable->ServerName[i]);
1304 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1305 return -EFAULT;
1306 return 0;
1307 }
1da177e4 1308 case CCISS_SETNODENAME:
7c832835
BH		 1309 {
1310 NodeName_type NodeName;
1311 unsigned long flags;
1312 int i;
1313
1314 if (!arg)
1315 return -EINVAL;
1316 if (!capable(CAP_SYS_ADMIN))
1317 return -EPERM;
1318
1319 if (copy_from_user
1320 (NodeName, argp, sizeof(NodeName_type)))
1321 return -EFAULT;
1322
1323 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1324
1325 /* Update the field, and then ring the doorbell */
1326 for (i = 0; i < 16; i++)
1327 writeb(NodeName[i],
1328 &host->cfgtable->ServerName[i]);
1329
1330 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1331
1332 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1333 if (!(readl(host->vaddr + SA5_DOORBELL)
1334 & CFGTBL_ChangeReq))
1335 break;
1336 /* delay and try again */
1337 udelay(1000);
1338 }
1339 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1340 if (i >= MAX_IOCTL_CONFIG_WAIT)
1341 return -EAGAIN;
1342 return 0;
1343 }
1da177e4
LT		 1344
1345 case CCISS_GETHEARTBEAT:
7c832835
BH		 1346 {
1347 Heartbeat_type heartbeat;
1348
1349 if (!arg)
1350 return -EINVAL;
1351 heartbeat = readl(&host->cfgtable->HeartBeat);
1352 if (copy_to_user
1353 (argp, &heartbeat, sizeof(Heartbeat_type)))
1354 return -EFAULT;
1355 return 0;
1356 }
1da177e4 1357 case CCISS_GETBUSTYPES:
7c832835
BH		 1358 {
1359 BusTypes_type BusTypes;
1360
1361 if (!arg)
1362 return -EINVAL;
1363 BusTypes = readl(&host->cfgtable->BusTypes);
1364 if (copy_to_user
1365 (argp, &BusTypes, sizeof(BusTypes_type)))
1366 return -EFAULT;
1367 return 0;
1368 }
1da177e4 1369 case CCISS_GETFIRMVER:
7c832835
BH		 1370 {
1371 FirmwareVer_type firmware;
1da177e4 1372
7c832835
BH		 1373 if (!arg)
1374 return -EINVAL;
1375 memcpy(firmware, host->firm_ver, 4);
1da177e4 1376
7c832835
BH		 1377 if (copy_to_user
1378 (argp, firmware, sizeof(FirmwareVer_type)))
1379 return -EFAULT;
1380 return 0;
1381 }
1382 case CCISS_GETDRIVVER:
1383 {
1384 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1385
7c832835
BH		 1386 if (!arg)
1387 return -EINVAL;
1da177e4 1388
7c832835
BH		 1389 if (copy_to_user
1390 (argp, &DriverVer, sizeof(DriverVer_type)))
1391 return -EFAULT;
1392 return 0;
1393 }
1da177e4 1394
6ae5ce8e
MM		 1395 case CCISS_DEREGDISK:
1396 case CCISS_REGNEWD:
1da177e4 1397 case CCISS_REVALIDVOLS:
2d11d993 1398 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1399
1400 case CCISS_GETLUNINFO:{
1401 LogvolInfo_struct luninfo;
1402
39ccf9a6
SC		 1403 memcpy(&luninfo.LunID, drv->LunID,
1404 sizeof(luninfo.LunID));
7c832835
BH		 1405 luninfo.num_opens = drv->usage_count;
1406 luninfo.num_parts = 0;
1407 if (copy_to_user(argp, &luninfo,
1408 sizeof(LogvolInfo_struct)))
1409 return -EFAULT;
1410 return 0;
1411 }
1da177e4 1412 case CCISS_PASSTHRU:
1da177e4 1413 {
7c832835
BH		 1414 IOCTL_Command_struct iocommand;
1415 CommandList_struct *c;
1416 char *buff = NULL;
1417 u64bit temp64;
6e9a4738 1418 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1419
7c832835
BH		 1420 if (!arg)
1421 return -EINVAL;
1da177e4 1422
7c832835
BH		 1423 if (!capable(CAP_SYS_RAWIO))
1424 return -EPERM;
1da177e4 1425
7c832835
BH		 1426 if (copy_from_user
1427 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1428 return -EFAULT;
1429 if ((iocommand.buf_size < 1) &&
1430 (iocommand.Request.Type.Direction != XFER_NONE)) {
1431 return -EINVAL;
1432 }
1433#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1434 /* Check kmalloc limits */
1435 if (iocommand.buf_size > 128000)
1436 return -EINVAL;
1437#endif
1438 if (iocommand.buf_size > 0) {
1439 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1440 if (buff == NULL)
1441 return -EFAULT;
1442 }
1443 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1444 /* Copy the data into the buffer we created */
1445 if (copy_from_user
1446 (buff, iocommand.buf, iocommand.buf_size)) {
1447 kfree(buff);
1448 return -EFAULT;
1449 }
1450 } else {
1451 memset(buff, 0, iocommand.buf_size);
1452 }
1453 if ((c = cmd_alloc(host, 0)) == NULL) {
1454 kfree(buff);
1455 return -ENOMEM;
1456 }
b028461d 1457 /* Fill in the command type */
7c832835 1458 c->cmd_type = CMD_IOCTL_PEND;
b028461d 1459 /* Fill in Command Header */
1460 c->Header.ReplyQueue = 0; /* unused in simple mode */
1461 if (iocommand.buf_size > 0) /* buffer to fill */
7c832835
BH		 1462 {
1463 c->Header.SGList = 1;
1464 c->Header.SGTotal = 1;
b028461d 1465 } else /* no buffers to fill */
7c832835
BH		 1466 {
1467 c->Header.SGList = 0;
1468 c->Header.SGTotal = 0;
1469 }
1470 c->Header.LUN = iocommand.LUN_info;
b028461d 1471 /* use the kernel address the cmd block for tag */
1472 c->Header.Tag.lower = c->busaddr;
1da177e4 1473
b028461d 1474 /* Fill in Request block */
7c832835 1475 c->Request = iocommand.Request;
1da177e4 1476
b028461d 1477 /* Fill in the scatter gather information */
7c832835
BH		 1478 if (iocommand.buf_size > 0) {
1479 temp64.val = pci_map_single(host->pdev, buff,
1480 iocommand.buf_size,
1481 PCI_DMA_BIDIRECTIONAL);
1482 c->SG[0].Addr.lower = temp64.val32.lower;
1483 c->SG[0].Addr.upper = temp64.val32.upper;
1484 c->SG[0].Len = iocommand.buf_size;
b028461d 1485 c->SG[0].Ext = 0; /* we are not chaining */
7c832835
BH		 1486 }
1487 c->waiting = &wait;
1488
664a717d 1489 enqueue_cmd_and_start_io(host, c);
7c832835
BH		 1490 wait_for_completion(&wait);
1491
1492 /* unlock the buffers from DMA */
1493 temp64.val32.lower = c->SG[0].Addr.lower;
1494 temp64.val32.upper = c->SG[0].Addr.upper;
1495 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1496 iocommand.buf_size,
1497 PCI_DMA_BIDIRECTIONAL);
1498
0a9279cc
MM		 1499 check_ioctl_unit_attention(host, c);
1500
7c832835
BH		 1501 /* Copy the error information out */
1502 iocommand.error_info = *(c->err_info);
1503 if (copy_to_user
1504 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1505 kfree(buff);
1da177e4
LT		 1506 cmd_free(host, c, 0);
1507 return -EFAULT;
1508 }
7c832835
BH		 1509
1510 if (iocommand.Request.Type.Direction == XFER_READ) {
1511 /* Copy the data out of the buffer we created */
1512 if (copy_to_user
1513 (iocommand.buf, buff, iocommand.buf_size)) {
1514 kfree(buff);
1515 cmd_free(host, c, 0);
1516 return -EFAULT;
1517 }
1518 }
1519 kfree(buff);
1520 cmd_free(host, c, 0);
1521 return 0;
1da177e4 1522 }
7c832835
BH		 1523 case CCISS_BIG_PASSTHRU:{
1524 BIG_IOCTL_Command_struct *ioc;
1525 CommandList_struct *c;
1526 unsigned char **buff = NULL;
1527 int *buff_size = NULL;
1528 u64bit temp64;
7c832835
BH		 1529 BYTE sg_used = 0;
1530 int status = 0;
1531 int i;
6e9a4738 1532 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1533 __u32 left;
1534 __u32 sz;
1535 BYTE __user *data_ptr;
1536
1537 if (!arg)
1538 return -EINVAL;
1539 if (!capable(CAP_SYS_RAWIO))
1540 return -EPERM;
1541 ioc = (BIG_IOCTL_Command_struct *)
1542 kmalloc(sizeof(*ioc), GFP_KERNEL);
1543 if (!ioc) {
1544 status = -ENOMEM;
1545 goto cleanup1;
1546 }
1547 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1548 status = -EFAULT;
1549 goto cleanup1;
1550 }
1551 if ((ioc->buf_size < 1) &&
1552 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1553 status = -EINVAL;
1554 goto cleanup1;
7c832835
BH		 1555 }
1556 /* Check kmalloc limits using all SGs */
1557 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1558 status = -EINVAL;
1559 goto cleanup1;
1560 }
1561 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1562 status = -EINVAL;
1563 goto cleanup1;
1564 }
1565 buff =
1566 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1567 if (!buff) {
1da177e4
LT		 1568 status = -ENOMEM;
1569 goto cleanup1;
1570 }
5cbded58 1571 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1572 GFP_KERNEL);
1573 if (!buff_size) {
1574 status = -ENOMEM;
1575 goto cleanup1;
1576 }
1577 left = ioc->buf_size;
1578 data_ptr = ioc->buf;
1579 while (left) {
1580 sz = (left >
1581 ioc->malloc_size) ? ioc->
1582 malloc_size : left;
1583 buff_size[sg_used] = sz;
1584 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1585 if (buff[sg_used] == NULL) {
1da177e4 1586 status = -ENOMEM;
15534d38
JA		 1587 goto cleanup1;
1588 }
7c832835
BH		 1589 if (ioc->Request.Type.Direction == XFER_WRITE) {
1590 if (copy_from_user
1591 (buff[sg_used], data_ptr, sz)) {
f7108f91 1592 status = -EFAULT;
7c832835
BH		 1593 goto cleanup1;
1594 }
1595 } else {
1596 memset(buff[sg_used], 0, sz);
1597 }
1598 left -= sz;
1599 data_ptr += sz;
1600 sg_used++;
1601 }
1602 if ((c = cmd_alloc(host, 0)) == NULL) {
1603 status = -ENOMEM;
1604 goto cleanup1;
1605 }
1606 c->cmd_type = CMD_IOCTL_PEND;
1607 c->Header.ReplyQueue = 0;
1608
1609 if (ioc->buf_size > 0) {
1610 c->Header.SGList = sg_used;
1611 c->Header.SGTotal = sg_used;
1da177e4 1612 } else {
7c832835
BH		 1613 c->Header.SGList = 0;
1614 c->Header.SGTotal = 0;
1da177e4 1615 }
7c832835
BH		 1616 c->Header.LUN = ioc->LUN_info;
1617 c->Header.Tag.lower = c->busaddr;
1618
1619 c->Request = ioc->Request;
1620 if (ioc->buf_size > 0) {
7c832835
BH		 1621 for (i = 0; i < sg_used; i++) {
1622 temp64.val =
1623 pci_map_single(host->pdev, buff[i],
1624 buff_size[i],
1625 PCI_DMA_BIDIRECTIONAL);
1626 c->SG[i].Addr.lower =
1627 temp64.val32.lower;
1628 c->SG[i].Addr.upper =
1629 temp64.val32.upper;
1630 c->SG[i].Len = buff_size[i];
1631 c->SG[i].Ext = 0; /* we are not chaining */
1632 }
1633 }
1634 c->waiting = &wait;
664a717d 1635 enqueue_cmd_and_start_io(host, c);
7c832835
BH		 1636 wait_for_completion(&wait);
1637 /* unlock the buffers from DMA */
1638 for (i = 0; i < sg_used; i++) {
1639 temp64.val32.lower = c->SG[i].Addr.lower;
1640 temp64.val32.upper = c->SG[i].Addr.upper;
1641 pci_unmap_single(host->pdev,
1642 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1643 PCI_DMA_BIDIRECTIONAL);
1da177e4 1644 }
0a9279cc 1645 check_ioctl_unit_attention(host, c);
7c832835
BH		 1646 /* Copy the error information out */
1647 ioc->error_info = *(c->err_info);
1648 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1649 cmd_free(host, c, 0);
1650 status = -EFAULT;
1651 goto cleanup1;
1652 }
1653 if (ioc->Request.Type.Direction == XFER_READ) {
1654 /* Copy the data out of the buffer we created */
1655 BYTE __user *ptr = ioc->buf;
1656 for (i = 0; i < sg_used; i++) {
1657 if (copy_to_user
1658 (ptr, buff[i], buff_size[i])) {
1659 cmd_free(host, c, 0);
1660 status = -EFAULT;
1661 goto cleanup1;
1662 }
1663 ptr += buff_size[i];
1da177e4 1664 }
1da177e4 1665 }
7c832835
BH		 1666 cmd_free(host, c, 0);
1667 status = 0;
1668 cleanup1:
1669 if (buff) {
1670 for (i = 0; i < sg_used; i++)
1671 kfree(buff[i]);
1672 kfree(buff);
1673 }
1674 kfree(buff_size);
1675 kfree(ioc);
1676 return status;
1da177e4 1677 }
03bbfee5
MMOD		 1678
1679 /* scsi_cmd_ioctl handles these, below, though some are not */
1680 /* very meaningful for cciss. SG_IO is the main one people want. */
1681
1682 case SG_GET_VERSION_NUM:
1683 case SG_SET_TIMEOUT:
1684 case SG_GET_TIMEOUT:
1685 case SG_GET_RESERVED_SIZE:
1686 case SG_SET_RESERVED_SIZE:
1687 case SG_EMULATED_HOST:
1688 case SG_IO:
1689 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1690 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1691
1692 /* scsi_cmd_ioctl would normally handle these, below, but */
1693 /* they aren't a good fit for cciss, as CD-ROMs are */
1694 /* not supported, and we don't have any bus/target/lun */
1695 /* which we present to the kernel. */
1696
1697 case CDROM_SEND_PACKET:
1698 case CDROMCLOSETRAY:
1699 case CDROMEJECT:
1700 case SCSI_IOCTL_GET_IDLUN:
1701 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1702 default:
1703 return -ENOTTY;
1704 }
1da177e4
LT		 1705}
1706
7b30f092
JA		 1707static void cciss_check_queues(ctlr_info_t *h)
1708{
1709 int start_queue = h->next_to_run;
1710 int i;
1711
1712 /* check to see if we have maxed out the number of commands that can
1713 * be placed on the queue. If so then exit. We do this check here
1714 * in case the interrupt we serviced was from an ioctl and did not
1715 * free any new commands.
1716 */
f880632f 1717 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1718 return;
1719
1720 /* We have room on the queue for more commands. Now we need to queue
1721 * them up. We will also keep track of the next queue to run so
1722 * that every queue gets a chance to be started first.
1723 */
1724 for (i = 0; i < h->highest_lun + 1; i++) {
1725 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1726 /* make sure the disk has been added and the drive is real
1727 * because this can be called from the middle of init_one.
1728 */
9cef0d2f
SC		 1729 if (!h->drv[curr_queue])
1730 continue;
1731 if (!(h->drv[curr_queue]->queue) ||
1732 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1733 continue;
1734 blk_start_queue(h->gendisk[curr_queue]->queue);
1735
1736 /* check to see if we have maxed out the number of commands
1737 * that can be placed on the queue.
1738 */
f880632f 1739 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1740 if (curr_queue == start_queue) {
1741 h->next_to_run =
1742 (start_queue + 1) % (h->highest_lun + 1);
1743 break;
1744 } else {
1745 h->next_to_run = curr_queue;
1746 break;
1747 }
7b30f092
JA		 1748 }
1749 }
1750}
1751
ca1e0484
MM		 1752static void cciss_softirq_done(struct request *rq)
1753{
1754 CommandList_struct *cmd = rq->completion_data;
1755 ctlr_info_t *h = hba[cmd->ctlr];
5c07a311 1756 SGDescriptor_struct *curr_sg = cmd->SG;
ca1e0484 1757 u64bit temp64;
664a717d 1758 unsigned long flags;
ca1e0484 1759 int i, ddir;
5c07a311 1760 int sg_index = 0;
ca1e0484
MM		 1761
1762 if (cmd->Request.Type.Direction == XFER_READ)
1763 ddir = PCI_DMA_FROMDEVICE;
1764 else
1765 ddir = PCI_DMA_TODEVICE;
1766
1767 /* command did not need to be retried */
1768 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1769 for (i = 0; i < cmd->Header.SGList; i++) {
5c07a311 1770 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
d45033ef 1771 cciss_unmap_sg_chain_block(h, cmd);
5c07a311 1772 /* Point to the next block */
dccc9b56 1773 curr_sg = h->cmd_sg_list[cmd->cmdindex];
5c07a311
DB		 1774 sg_index = 0;
1775 }
1776 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1777 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1778 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1779 ddir);
1780 ++sg_index;
ca1e0484
MM		 1781 }
1782
ca1e0484
MM		 1783#ifdef CCISS_DEBUG
1784 printk("Done with %p\n", rq);
7c832835 1785#endif /* CCISS_DEBUG */
ca1e0484 1786
c3a4d78c 1787 /* set the residual count for pc requests */
33659ebb 1788 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
c3a4d78c 1789 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1790
c3a4d78c 1791 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1792
ca1e0484 1793 spin_lock_irqsave(&h->lock, flags);
7c832835 1794 cmd_free(h, cmd, 1);
7b30f092 1795 cciss_check_queues(h);
ca1e0484
MM		 1796 spin_unlock_irqrestore(&h->lock, flags);
1797}
1798
39ccf9a6
SC		 1799static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1800 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1801{
9cef0d2f
SC		 1802 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1803 sizeof(h->drv[log_unit]->LunID));
b57695fe 1804}
1805
7fe06326
AP		 1806/* This function gets the SCSI vendor, model, and revision of a logical drive
1807 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1808 * they cannot be read.
1809 */
7b838bde 1810static void cciss_get_device_descr(int ctlr, int logvol,
7fe06326
AP		 1811 char *vendor, char *model, char *rev)
1812{
1813 int rc;
1814 InquiryData_struct *inq_buf;
b57695fe 1815 unsigned char scsi3addr[8];
7fe06326
AP		 1816
1817 *vendor = '\0';
1818 *model = '\0';
1819 *rev = '\0';
1820
1821 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1822 if (!inq_buf)
1823 return;
1824
b57695fe 1825 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1826 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1827 scsi3addr, TYPE_CMD);
7fe06326
AP		 1828 if (rc == IO_OK) {
1829 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1830 vendor[VENDOR_LEN] = '\0';
1831 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1832 model[MODEL_LEN] = '\0';
1833 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1834 rev[REV_LEN] = '\0';
1835 }
1836
1837 kfree(inq_buf);
1838 return;
1839}
1840
a72da29b
MM		 1841/* This function gets the serial number of a logical drive via
1842 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1843 * number cannot be had, for whatever reason, 16 bytes of 0xff
1844 * are returned instead.
1845 */
7b838bde 1846static void cciss_get_serial_no(int ctlr, int logvol,
a72da29b
MM		 1847 unsigned char *serial_no, int buflen)
1848{
1849#define PAGE_83_INQ_BYTES 64
1850 int rc;
1851 unsigned char *buf;
b57695fe 1852 unsigned char scsi3addr[8];
a72da29b
MM		 1853
1854 if (buflen > 16)
1855 buflen = 16;
1856 memset(serial_no, 0xff, buflen);
1857 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1858 if (!buf)
1859 return;
1860 memset(serial_no, 0, buflen);
b57695fe 1861 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1862 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1863 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1864 if (rc == IO_OK)
1865 memcpy(serial_no, &buf[8], buflen);
1866 kfree(buf);
1867 return;
1868}
1869
617e1344
SC		 1870/*
1871 * cciss_add_disk sets up the block device queue for a logical drive
1872 */
1873static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1874 int drv_index)
1875{
1876 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1877 if (!disk->queue)
1878 goto init_queue_failure;
6ae5ce8e
MM		 1879 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1880 disk->major = h->major;
1881 disk->first_minor = drv_index << NWD_SHIFT;
1882 disk->fops = &cciss_fops;
9cef0d2f
SC		 1883 if (cciss_create_ld_sysfs_entry(h, drv_index))
1884 goto cleanup_queue;
1885 disk->private_data = h->drv[drv_index];
1886 disk->driverfs_dev = &h->drv[drv_index]->dev;
6ae5ce8e
MM		 1887
1888 /* Set up queue information */
1889 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1890
1891 /* This is a hardware imposed limit. */
8a78362c 1892 blk_queue_max_segments(disk->queue, h->maxsgentries);
6ae5ce8e 1893
086fa5ff 1894 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
6ae5ce8e
MM		 1895
1896 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1897
1898 disk->queue->queuedata = h;
1899
e1defc4f 1900 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1901 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1902
1903 /* Make sure all queue data is written out before */
9cef0d2f 1904 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1905 /* allows the interrupt handler to start the queue */
1906 wmb();
9cef0d2f 1907 h->drv[drv_index]->queue = disk->queue;
6ae5ce8e 1908 add_disk(disk);
617e1344
SC		 1909 return 0;
1910
1911cleanup_queue:
1912 blk_cleanup_queue(disk->queue);
1913 disk->queue = NULL;
e8074f79 1914init_queue_failure:
617e1344 1915 return -1;
6ae5ce8e
MM		 1916}
1917
ddd47442 1918/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1919 * If the usage_count is zero and it is a heretofore unknown drive, or,
1920 * the drive's capacity, geometry, or serial number has changed,
1921 * then the drive information will be updated and the disk will be
1922 * re-registered with the kernel. If these conditions don't hold,
1923 * then it will be left alone for the next reboot. The exception to this
1924 * is disk 0 which will always be left registered with the kernel since it
1925 * is also the controller node. Any changes to disk 0 will show up on
1926 * the next reboot.
7c832835 1927 */
2d11d993
SC		 1928static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1929 int via_ioctl)
7c832835 1930{
ddd47442
MM		 1931 ctlr_info_t *h = hba[ctlr];
1932 struct gendisk *disk;
ddd47442
MM		 1933 InquiryData_struct *inq_buff = NULL;
1934 unsigned int block_size;
00988a35 1935 sector_t total_size;
ddd47442
MM		 1936 unsigned long flags = 0;
1937 int ret = 0;
a72da29b
MM		 1938 drive_info_struct *drvinfo;
1939
1940 /* Get information about the disk and modify the driver structure */
1941 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1942 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 1943 if (inq_buff == NULL || drvinfo == NULL)
1944 goto mem_msg;
1945
1946 /* testing to see if 16-byte CDBs are already being used */
1947 if (h->cciss_read == CCISS_READ_16) {
7b838bde 1948 cciss_read_capacity_16(h->ctlr, drv_index,
a72da29b
MM		 1949 &total_size, &block_size);
1950
1951 } else {
7b838bde 1952 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
a72da29b
MM		 1953 /* if read_capacity returns all F's this volume is >2TB */
1954 /* in size so we switch to 16-byte CDB's for all */
1955 /* read/write ops */
1956 if (total_size == 0xFFFFFFFFULL) {
7b838bde 1957 cciss_read_capacity_16(ctlr, drv_index,
a72da29b
MM		 1958 &total_size, &block_size);
1959 h->cciss_read = CCISS_READ_16;
1960 h->cciss_write = CCISS_WRITE_16;
1961 } else {
1962 h->cciss_read = CCISS_READ_10;
1963 h->cciss_write = CCISS_WRITE_10;
1964 }
1965 }
1966
7b838bde 1967 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
a72da29b
MM		 1968 inq_buff, drvinfo);
1969 drvinfo->block_size = block_size;
1970 drvinfo->nr_blocks = total_size + 1;
1971
7b838bde 1972 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
7fe06326 1973 drvinfo->model, drvinfo->rev);
7b838bde 1974 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
a72da29b 1975 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 1976 /* Save the lunid in case we deregister the disk, below. */
1977 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1978 sizeof(drvinfo->LunID));
a72da29b
MM		 1979
1980 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 1981 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 1982 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 1983 h->drv[drv_index]->serial_no, 16) == 0) &&
1984 drvinfo->block_size == h->drv[drv_index]->block_size &&
1985 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1986 drvinfo->heads == h->drv[drv_index]->heads &&
1987 drvinfo->sectors == h->drv[drv_index]->sectors &&
1988 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 1989 /* The disk is unchanged, nothing to update */
1990 goto freeret;
a72da29b 1991
6ae5ce8e
MM		 1992 /* If we get here it's not the same disk, or something's changed,
1993 * so we need to * deregister it, and re-register it, if it's not
1994 * in use.
1995 * If the disk already exists then deregister it before proceeding
1996 * (unless it's the first disk (for the controller node).
1997 */
9cef0d2f 1998 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 1999 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442 2000 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2001 h->drv[drv_index]->busy_configuring = 1;
ddd47442 2002 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 2003
9cef0d2f 2004 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 2005 * which keeps the interrupt handler from starting
2006 * the queue.
2007 */
2d11d993 2008 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 2009 }
2010
2011 /* If the disk is in use return */
2012 if (ret)
a72da29b
MM		 2013 goto freeret;
2014
6ae5ce8e 2015 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 2016 * and serial number inquiry. If the disk was deregistered
2017 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 2018 */
9cef0d2f
SC		 2019 if (h->drv[drv_index] == NULL) {
2020 drvinfo->device_initialized = 0;
2021 h->drv[drv_index] = drvinfo;
2022 drvinfo = NULL; /* so it won't be freed below. */
2023 } else {
2024 /* special case for cxd0 */
2025 h->drv[drv_index]->block_size = drvinfo->block_size;
2026 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2027 h->drv[drv_index]->heads = drvinfo->heads;
2028 h->drv[drv_index]->sectors = drvinfo->sectors;
2029 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2030 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2031 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2032 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2033 VENDOR_LEN + 1);
2034 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2035 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2036 }
ddd47442
MM		 2037
2038 ++h->num_luns;
2039 disk = h->gendisk[drv_index];
9cef0d2f 2040 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 2041
6ae5ce8e
MM		 2042 /* If it's not disk 0 (drv_index != 0)
2043 * or if it was disk 0, but there was previously
2044 * no actual corresponding configured logical drive
2045 * (raid_leve == -1) then we want to update the
2046 * logical drive's information.
2047 */
361e9b07
SC		 2048 if (drv_index || first_time) {
2049 if (cciss_add_disk(h, disk, drv_index) != 0) {
2050 cciss_free_gendisk(h, drv_index);
9cef0d2f 2051 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2052 printk(KERN_WARNING "cciss:%d could not update "
2053 "disk %d\n", h->ctlr, drv_index);
2054 --h->num_luns;
2055 }
2056 }
ddd47442 2057
6ae5ce8e 2058freeret:
ddd47442 2059 kfree(inq_buff);
a72da29b 2060 kfree(drvinfo);
ddd47442 2061 return;
6ae5ce8e 2062mem_msg:
ddd47442
MM		 2063 printk(KERN_ERR "cciss: out of memory\n");
2064 goto freeret;
2065}
2066
2067/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 2068 * that has a null drv pointer and allocate the drive info struct and
2069 * will return that index This is where new drives will be added.
2070 * If the index to be returned is greater than the highest_lun index for
2071 * the controller then highest_lun is set * to this new index.
2072 * If there are no available indexes or if tha allocation fails, then -1
2073 * is returned. * "controller_node" is used to know if this is a real
2074 * logical drive, or just the controller node, which determines if this
2075 * counts towards highest_lun.
7c832835 2076 */
9cef0d2f 2077static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 2078{
2079 int i;
9cef0d2f 2080 drive_info_struct *drv;
ddd47442 2081
9cef0d2f 2082 /* Search for an empty slot for our drive info */
7c832835 2083 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 2084
2085 /* if not cxd0 case, and it's occupied, skip it. */
2086 if (h->drv[i] && i != 0)
2087 continue;
2088 /*
2089 * If it's cxd0 case, and drv is alloc'ed already, and a
2090 * disk is configured there, skip it.
2091 */
2092 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2093 continue;
2094
2095 /*
2096 * We've found an empty slot. Update highest_lun
2097 * provided this isn't just the fake cxd0 controller node.
2098 */
2099 if (i > h->highest_lun && !controller_node)
2100 h->highest_lun = i;
2101
2102 /* If adding a real disk at cxd0, and it's already alloc'ed */
2103 if (i == 0 && h->drv[i] != NULL)
ddd47442 2104 return i;
9cef0d2f
SC		 2105
2106 /*
2107 * Found an empty slot, not already alloc'ed. Allocate it.
2108 * Mark it with raid_level == -1, so we know it's new later on.
2109 */
2110 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2111 if (!drv)
2112 return -1;
2113 drv->raid_level = -1; /* so we know it's new */
2114 h->drv[i] = drv;
2115 return i;
ddd47442
MM		 2116 }
2117 return -1;
2118}
2119
9cef0d2f
SC		 2120static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2121{
2122 kfree(h->drv[drv_index]);
2123 h->drv[drv_index] = NULL;
2124}
2125
361e9b07
SC		 2126static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2127{
2128 put_disk(h->gendisk[drv_index]);
2129 h->gendisk[drv_index] = NULL;
2130}
2131
6ae5ce8e
MM		 2132/* cciss_add_gendisk finds a free hba[]->drv structure
2133 * and allocates a gendisk if needed, and sets the lunid
2134 * in the drvinfo structure. It returns the index into
2135 * the ->drv[] array, or -1 if none are free.
2136 * is_controller_node indicates whether highest_lun should
2137 * count this disk, or if it's only being added to provide
2138 * a means to talk to the controller in case no logical
2139 * drives have yet been configured.
2140 */
39ccf9a6
SC		 2141static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2142 int controller_node)
6ae5ce8e
MM		 2143{
2144 int drv_index;
2145
9cef0d2f 2146 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2147 if (drv_index == -1)
2148 return -1;
8ce51966 2149
6ae5ce8e
MM		 2150 /*Check if the gendisk needs to be allocated */
2151 if (!h->gendisk[drv_index]) {
2152 h->gendisk[drv_index] =
2153 alloc_disk(1 << NWD_SHIFT);
2154 if (!h->gendisk[drv_index]) {
2155 printk(KERN_ERR "cciss%d: could not "
2156 "allocate a new disk %d\n",
2157 h->ctlr, drv_index);
9cef0d2f 2158 goto err_free_drive_info;
6ae5ce8e
MM		 2159 }
2160 }
9cef0d2f
SC		 2161 memcpy(h->drv[drv_index]->LunID, lunid,
2162 sizeof(h->drv[drv_index]->LunID));
2163 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2164 goto err_free_disk;
6ae5ce8e
MM		 2165 /* Don't need to mark this busy because nobody */
2166 /* else knows about this disk yet to contend */
2167 /* for access to it. */
9cef0d2f 2168 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2169 wmb();
2170 return drv_index;
7fe06326
AP		 2171
2172err_free_disk:
361e9b07 2173 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2174err_free_drive_info:
2175 cciss_free_drive_info(h, drv_index);
7fe06326 2176 return -1;
6ae5ce8e
MM		 2177}
2178
2179/* This is for the special case of a controller which
2180 * has no logical drives. In this case, we still need
2181 * to register a disk so the controller can be accessed
2182 * by the Array Config Utility.
2183 */
2184static void cciss_add_controller_node(ctlr_info_t *h)
2185{
2186 struct gendisk *disk;
2187 int drv_index;
2188
2189 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2190 return;
2191
39ccf9a6 2192 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2193 if (drv_index == -1)
2194 goto error;
9cef0d2f
SC		 2195 h->drv[drv_index]->block_size = 512;
2196 h->drv[drv_index]->nr_blocks = 0;
2197 h->drv[drv_index]->heads = 0;
2198 h->drv[drv_index]->sectors = 0;
2199 h->drv[drv_index]->cylinders = 0;
2200 h->drv[drv_index]->raid_level = -1;
2201 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2202 disk = h->gendisk[drv_index];
361e9b07
SC		 2203 if (cciss_add_disk(h, disk, drv_index) == 0)
2204 return;
2205 cciss_free_gendisk(h, drv_index);
9cef0d2f 2206 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2207error:
2208 printk(KERN_WARNING "cciss%d: could not "
2209 "add disk 0.\n", h->ctlr);
2210 return;
6ae5ce8e
MM		 2211}
2212
ddd47442 2213/* This function will add and remove logical drives from the Logical
d14c4ab5 2214 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2215 * so that mount points are preserved until the next reboot. This allows
2216 * for the removal of logical drives in the middle of the drive array
2217 * without a re-ordering of those drives.
2218 * INPUT
2219 * h = The controller to perform the operations on
7c832835 2220 */
2d11d993
SC		 2221static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2222 int via_ioctl)
1da177e4 2223{
ddd47442
MM		 2224 int ctlr = h->ctlr;
2225 int num_luns;
2226 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2227 int return_code;
2228 int listlength = 0;
2229 int i;
2230 int drv_found;
2231 int drv_index = 0;
39ccf9a6 2232 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2233 unsigned long flags;
ddd47442 2234
6ae5ce8e
MM		 2235 if (!capable(CAP_SYS_RAWIO))
2236 return -EPERM;
2237
ddd47442
MM		 2238 /* Set busy_configuring flag for this operation */
2239 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2240 if (h->busy_configuring) {
ddd47442
MM		 2241 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2242 return -EBUSY;
2243 }
2244 h->busy_configuring = 1;
a72da29b 2245 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2246
a72da29b
MM		 2247 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2248 if (ld_buff == NULL)
2249 goto mem_msg;
2250
2251 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2252 sizeof(ReportLunData_struct),
2253 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2254
a72da29b
MM		 2255 if (return_code == IO_OK)
2256 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2257 else { /* reading number of logical volumes failed */
2258 printk(KERN_WARNING "cciss: report logical volume"
2259 " command failed\n");
2260 listlength = 0;
2261 goto freeret;
2262 }
2263
2264 num_luns = listlength / 8; /* 8 bytes per entry */
2265 if (num_luns > CISS_MAX_LUN) {
2266 num_luns = CISS_MAX_LUN;
2267 printk(KERN_WARNING "cciss: more luns configured"
2268 " on controller than can be handled by"
2269 " this driver.\n");
2270 }
2271
6ae5ce8e
MM		 2272 if (num_luns == 0)
2273 cciss_add_controller_node(h);
2274
2275 /* Compare controller drive array to driver's drive array
2276 * to see if any drives are missing on the controller due
2277 * to action of Array Config Utility (user deletes drive)
2278 * and deregister logical drives which have disappeared.
2279 */
a72da29b
MM		 2280 for (i = 0; i <= h->highest_lun; i++) {
2281 int j;
2282 drv_found = 0;
d8a0be6a
SC		 2283
2284 /* skip holes in the array from already deleted drives */
9cef0d2f 2285 if (h->drv[i] == NULL)
d8a0be6a
SC		 2286 continue;
2287
a72da29b 2288 for (j = 0; j < num_luns; j++) {
39ccf9a6 2289 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2290 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2291 sizeof(lunid)) == 0) {
a72da29b
MM		 2292 drv_found = 1;
2293 break;
2294 }
2295 }
2296 if (!drv_found) {
2297 /* Deregister it from the OS, it's gone. */
2298 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2299 h->drv[i]->busy_configuring = 1;
a72da29b 2300 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2301 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2302 if (h->drv[i] != NULL)
2303 h->drv[i]->busy_configuring = 0;
ddd47442 2304 }
a72da29b 2305 }
ddd47442 2306
a72da29b
MM		 2307 /* Compare controller drive array to driver's drive array.
2308 * Check for updates in the drive information and any new drives
2309 * on the controller due to ACU adding logical drives, or changing
2310 * a logical drive's size, etc. Reregister any new/changed drives
2311 */
2312 for (i = 0; i < num_luns; i++) {
2313 int j;
ddd47442 2314
a72da29b 2315 drv_found = 0;
ddd47442 2316
39ccf9a6 2317 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2318 /* Find if the LUN is already in the drive array
2319 * of the driver. If so then update its info
2320 * if not in use. If it does not exist then find
2321 * the first free index and add it.
2322 */
2323 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2324 if (h->drv[j] != NULL &&
2325 memcmp(h->drv[j]->LunID, lunid,
2326 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2327 drv_index = j;
2328 drv_found = 1;
2329 break;
ddd47442 2330 }
a72da29b 2331 }
ddd47442 2332
a72da29b
MM		 2333 /* check if the drive was found already in the array */
2334 if (!drv_found) {
eece695f 2335 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2336 if (drv_index == -1)
2337 goto freeret;
a72da29b 2338 }
2d11d993
SC		 2339 cciss_update_drive_info(ctlr, drv_index, first_time,
2340 via_ioctl);
a72da29b 2341 } /* end for */
ddd47442 2342
6ae5ce8e 2343freeret:
ddd47442
MM		 2344 kfree(ld_buff);
2345 h->busy_configuring = 0;
2346 /* We return -1 here to tell the ACU that we have registered/updated
2347 * all of the drives that we can and to keep it from calling us
2348 * additional times.
7c832835 2349 */
ddd47442 2350 return -1;
6ae5ce8e 2351mem_msg:
ddd47442 2352 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2353 h->busy_configuring = 0;
ddd47442
MM		 2354 goto freeret;
2355}
2356
9ddb27b4
SC		 2357static void cciss_clear_drive_info(drive_info_struct *drive_info)
2358{
2359 /* zero out the disk size info */
2360 drive_info->nr_blocks = 0;
2361 drive_info->block_size = 0;
2362 drive_info->heads = 0;
2363 drive_info->sectors = 0;
2364 drive_info->cylinders = 0;
2365 drive_info->raid_level = -1;
2366 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2367 memset(drive_info->model, 0, sizeof(drive_info->model));
2368 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2369 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2370 /*
2371 * don't clear the LUNID though, we need to remember which
2372 * one this one is.
2373 */
2374}
2375
ddd47442
MM		 2376/* This function will deregister the disk and it's queue from the
2377 * kernel. It must be called with the controller lock held and the
2378 * drv structures busy_configuring flag set. It's parameters are:
2379 *
2380 * disk = This is the disk to be deregistered
2381 * drv = This is the drive_info_struct associated with the disk to be
2382 * deregistered. It contains information about the disk used
2383 * by the driver.
2384 * clear_all = This flag determines whether or not the disk information
2385 * is going to be completely cleared out and the highest_lun
2386 * reset. Sometimes we want to clear out information about
d14c4ab5 2387 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2388 * the highest_lun should be left unchanged and the LunID
2389 * should not be cleared.
2d11d993
SC		 2390 * via_ioctl
2391 * This indicates whether we've reached this path via ioctl.
2392 * This affects the maximum usage count allowed for c0d0 to be messed with.
2393 * If this path is reached via ioctl(), then the max_usage_count will
2394 * be 1, as the process calling ioctl() has got to have the device open.
2395 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2396*/
a0ea8622 2397static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2398 int clear_all, int via_ioctl)
ddd47442 2399{
799202cb 2400 int i;
a0ea8622
SC		 2401 struct gendisk *disk;
2402 drive_info_struct *drv;
9cef0d2f 2403 int recalculate_highest_lun;
1da177e4
LT		 2404
2405 if (!capable(CAP_SYS_RAWIO))
2406 return -EPERM;
2407
9cef0d2f 2408 drv = h->drv[drv_index];
a0ea8622
SC		 2409 disk = h->gendisk[drv_index];
2410
1da177e4 2411 /* make sure logical volume is NOT is use */
7c832835 2412 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2413 if (drv->usage_count > via_ioctl)
7c832835
BH		 2414 return -EBUSY;
2415 } else if (drv->usage_count > 0)
2416 return -EBUSY;
1da177e4 2417
9cef0d2f
SC		 2418 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2419
ddd47442
MM		 2420 /* invalidate the devices and deregister the disk. If it is disk
2421 * zero do not deregister it but just zero out it's values. This
2422 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2423 */
2424 if (h->gendisk[0] != disk) {
5a9df732 2425 struct request_queue *q = disk->queue;
097d0264 2426 if (disk->flags & GENHD_FL_UP) {
8ce51966 2427 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2428 del_gendisk(disk);
5a9df732 2429 }
9cef0d2f 2430 if (q)
5a9df732 2431 blk_cleanup_queue(q);
5a9df732
AB		 2432 /* If clear_all is set then we are deleting the logical
2433 * drive, not just refreshing its info. For drives
2434 * other than disk 0 we will call put_disk. We do not
2435 * do this for disk 0 as we need it to be able to
2436 * configure the controller.
a72da29b 2437 */
5a9df732
AB		 2438 if (clear_all){
2439 /* This isn't pretty, but we need to find the
2440 * disk in our array and NULL our the pointer.
2441 * This is so that we will call alloc_disk if
2442 * this index is used again later.
a72da29b 2443 */
5a9df732 2444 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2445 if (h->gendisk[i] == disk) {
5a9df732
AB		 2446 h->gendisk[i] = NULL;
2447 break;
799202cb 2448 }
799202cb 2449 }
5a9df732 2450 put_disk(disk);
ddd47442 2451 }
799202cb
MM		 2452 } else {
2453 set_capacity(disk, 0);
9cef0d2f 2454 cciss_clear_drive_info(drv);
ddd47442
MM		 2455 }
2456
2457 --h->num_luns;
ddd47442 2458
9cef0d2f
SC		 2459 /* if it was the last disk, find the new hightest lun */
2460 if (clear_all && recalculate_highest_lun) {
c2d45b4d 2461 int newhighest = -1;
9cef0d2f
SC		 2462 for (i = 0; i <= h->highest_lun; i++) {
2463 /* if the disk has size > 0, it is available */
2464 if (h->drv[i] && h->drv[i]->heads)
2465 newhighest = i;
1da177e4 2466 }
9cef0d2f 2467 h->highest_lun = newhighest;
ddd47442 2468 }
e2019b58 2469 return 0;
1da177e4 2470}
ddd47442 2471
b57695fe 2472static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2473 size_t size, __u8 page_code, unsigned char *scsi3addr,
2474 int cmd_type)
1da177e4 2475{
7c832835 2476 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2477 u64bit buff_dma_handle;
2478 int status = IO_OK;
2479
2480 c->cmd_type = CMD_IOCTL_PEND;
2481 c->Header.ReplyQueue = 0;
7c832835 2482 if (buff != NULL) {
1da177e4 2483 c->Header.SGList = 1;
7c832835 2484 c->Header.SGTotal = 1;
1da177e4
LT		 2485 } else {
2486 c->Header.SGList = 0;
7c832835 2487 c->Header.SGTotal = 0;
1da177e4
LT		 2488 }
2489 c->Header.Tag.lower = c->busaddr;
b57695fe 2490 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2491
2492 c->Request.Type.Type = cmd_type;
2493 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2494 switch (cmd) {
2495 case CISS_INQUIRY:
1da177e4 2496 /* are we trying to read a vital product page */
7c832835 2497 if (page_code != 0) {
1da177e4
LT		 2498 c->Request.CDB[1] = 0x01;
2499 c->Request.CDB[2] = page_code;
2500 }
2501 c->Request.CDBLen = 6;
7c832835 2502 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2503 c->Request.Type.Direction = XFER_READ;
2504 c->Request.Timeout = 0;
7c832835
BH		 2505 c->Request.CDB[0] = CISS_INQUIRY;
2506 c->Request.CDB[4] = size & 0xFF;
2507 break;
1da177e4
LT		 2508 case CISS_REPORT_LOG:
2509 case CISS_REPORT_PHYS:
7c832835 2510 /* Talking to controller so It's a physical command
1da177e4 2511 mode = 00 target = 0. Nothing to write.
7c832835 2512 */
1da177e4
LT		 2513 c->Request.CDBLen = 12;
2514 c->Request.Type.Attribute = ATTR_SIMPLE;
2515 c->Request.Type.Direction = XFER_READ;
2516 c->Request.Timeout = 0;
2517 c->Request.CDB[0] = cmd;
b028461d 2518 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
1da177e4
LT		 2519 c->Request.CDB[7] = (size >> 16) & 0xFF;
2520 c->Request.CDB[8] = (size >> 8) & 0xFF;
2521 c->Request.CDB[9] = size & 0xFF;
2522 break;
2523
2524 case CCISS_READ_CAPACITY:
1da177e4
LT		 2525 c->Request.CDBLen = 10;
2526 c->Request.Type.Attribute = ATTR_SIMPLE;
2527 c->Request.Type.Direction = XFER_READ;
2528 c->Request.Timeout = 0;
2529 c->Request.CDB[0] = cmd;
7c832835 2530 break;
00988a35 2531 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2532 c->Request.CDBLen = 16;
2533 c->Request.Type.Attribute = ATTR_SIMPLE;
2534 c->Request.Type.Direction = XFER_READ;
2535 c->Request.Timeout = 0;
2536 c->Request.CDB[0] = cmd;
2537 c->Request.CDB[1] = 0x10;
2538 c->Request.CDB[10] = (size >> 24) & 0xFF;
2539 c->Request.CDB[11] = (size >> 16) & 0xFF;
2540 c->Request.CDB[12] = (size >> 8) & 0xFF;
2541 c->Request.CDB[13] = size & 0xFF;
2542 c->Request.Timeout = 0;
2543 c->Request.CDB[0] = cmd;
2544 break;
1da177e4
LT		 2545 case CCISS_CACHE_FLUSH:
2546 c->Request.CDBLen = 12;
2547 c->Request.Type.Attribute = ATTR_SIMPLE;
2548 c->Request.Type.Direction = XFER_WRITE;
2549 c->Request.Timeout = 0;
2550 c->Request.CDB[0] = BMIC_WRITE;
2551 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2552 break;
88f627ae 2553 case TEST_UNIT_READY:
88f627ae
SC		 2554 c->Request.CDBLen = 6;
2555 c->Request.Type.Attribute = ATTR_SIMPLE;
2556 c->Request.Type.Direction = XFER_NONE;
2557 c->Request.Timeout = 0;
2558 break;
1da177e4
LT		 2559 default:
2560 printk(KERN_WARNING
7c832835 2561 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2562 return IO_ERROR;
1da177e4
LT		 2563 }
2564 } else if (cmd_type == TYPE_MSG) {
2565 switch (cmd) {
7c832835 2566 case 0: /* ABORT message */
3da8b713 2567 c->Request.CDBLen = 12;
2568 c->Request.Type.Attribute = ATTR_SIMPLE;
2569 c->Request.Type.Direction = XFER_WRITE;
2570 c->Request.Timeout = 0;
7c832835
BH		 2571 c->Request.CDB[0] = cmd; /* abort */
2572 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2573 /* buff contains the tag of the command to abort */
2574 memcpy(&c->Request.CDB[4], buff, 8);
2575 break;
7c832835 2576 case 1: /* RESET message */
88f627ae 2577 c->Request.CDBLen = 16;
3da8b713 2578 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2579 c->Request.Type.Direction = XFER_NONE;
3da8b713 2580 c->Request.Timeout = 0;
2581 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2582 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2583 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2584 break;
1da177e4
LT		 2585 case 3: /* No-Op message */
2586 c->Request.CDBLen = 1;
2587 c->Request.Type.Attribute = ATTR_SIMPLE;
2588 c->Request.Type.Direction = XFER_WRITE;
2589 c->Request.Timeout = 0;
2590 c->Request.CDB[0] = cmd;
2591 break;
2592 default:
2593 printk(KERN_WARNING
7c832835 2594 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2595 return IO_ERROR;
2596 }
2597 } else {
2598 printk(KERN_WARNING
7c832835 2599 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2600 return IO_ERROR;
2601 }
2602 /* Fill in the scatter gather information */
2603 if (size > 0) {
2604 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2605 buff, size,
2606 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2607 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2608 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2609 c->SG[0].Len = size;
7c832835 2610 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2611 }
2612 return status;
2613}
7c832835 2614
3c2ab402 2615static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2616{
2617 switch (c->err_info->ScsiStatus) {
2618 case SAM_STAT_GOOD:
2619 return IO_OK;
2620 case SAM_STAT_CHECK_CONDITION:
2621 switch (0xf & c->err_info->SenseInfo[2]) {
2622 case 0: return IO_OK; /* no sense */
2623 case 1: return IO_OK; /* recovered error */
2624 default:
c08fac65
SC		 2625 if (check_for_unit_attention(h, c))
2626 return IO_NEEDS_RETRY;
3c2ab402 2627 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2628 "check condition, sense key = 0x%02x\n",
2629 h->ctlr, c->Request.CDB[0],
2630 c->err_info->SenseInfo[2]);
2631 }
2632 break;
2633 default:
2634 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2635 "scsi status = 0x%02x\n", h->ctlr,
2636 c->Request.CDB[0], c->err_info->ScsiStatus);
2637 break;
2638 }
2639 return IO_ERROR;
2640}
2641
789a424a 2642static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2643{
5390cfc3 2644 int return_status = IO_OK;
7c832835 2645
789a424a 2646 if (c->err_info->CommandStatus == CMD_SUCCESS)
2647 return IO_OK;
5390cfc3 2648
2649 switch (c->err_info->CommandStatus) {
2650 case CMD_TARGET_STATUS:
3c2ab402 2651 return_status = check_target_status(h, c);
5390cfc3 2652 break;
2653 case CMD_DATA_UNDERRUN:
2654 case CMD_DATA_OVERRUN:
2655 /* expected for inquiry and report lun commands */
2656 break;
2657 case CMD_INVALID:
789a424a 2658 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2659 "reported invalid\n", c->Request.CDB[0]);
2660 return_status = IO_ERROR;
2661 break;
2662 case CMD_PROTOCOL_ERR:
2663 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2664 "protocol error \n", c->Request.CDB[0]);
2665 return_status = IO_ERROR;
2666 break;
2667 case CMD_HARDWARE_ERR:
2668 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2669 " hardware error\n", c->Request.CDB[0]);
2670 return_status = IO_ERROR;
2671 break;
2672 case CMD_CONNECTION_LOST:
2673 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2674 "connection lost\n", c->Request.CDB[0]);
2675 return_status = IO_ERROR;
2676 break;
2677 case CMD_ABORTED:
2678 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2679 "aborted\n", c->Request.CDB[0]);
2680 return_status = IO_ERROR;
2681 break;
2682 case CMD_ABORT_FAILED:
2683 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2684 "abort failed\n", c->Request.CDB[0]);
2685 return_status = IO_ERROR;
2686 break;
2687 case CMD_UNSOLICITED_ABORT:
2688 printk(KERN_WARNING
2689 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2690 c->Request.CDB[0]);
789a424a 2691 return_status = IO_NEEDS_RETRY;
5390cfc3 2692 break;
2693 default:
2694 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2695 "unknown status %x\n", c->Request.CDB[0],
2696 c->err_info->CommandStatus);
2697 return_status = IO_ERROR;
7c832835 2698 }
789a424a 2699 return return_status;
2700}
2701
2702static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2703 int attempt_retry)
2704{
2705 DECLARE_COMPLETION_ONSTACK(wait);
2706 u64bit buff_dma_handle;
789a424a 2707 int return_status = IO_OK;
2708
2709resend_cmd2:
2710 c->waiting = &wait;
664a717d 2711 enqueue_cmd_and_start_io(h, c);
789a424a 2712
2713 wait_for_completion(&wait);
2714
2715 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2716 goto command_done;
2717
2718 return_status = process_sendcmd_error(h, c);
2719
2720 if (return_status == IO_NEEDS_RETRY &&
2721 c->retry_count < MAX_CMD_RETRIES) {
2722 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2723 c->Request.CDB[0]);
2724 c->retry_count++;
2725 /* erase the old error information */
2726 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2727 return_status = IO_OK;
2728 INIT_COMPLETION(wait);
2729 goto resend_cmd2;
2730 }
5390cfc3 2731
2732command_done:
1da177e4 2733 /* unlock the buffers from DMA */
bb2a37bf
MM		 2734 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2735 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2736 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2737 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2738 return return_status;
2739}
2740
b57695fe 2741static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2742 __u8 page_code, unsigned char scsi3addr[],
2743 int cmd_type)
5390cfc3 2744{
2745 ctlr_info_t *h = hba[ctlr];
2746 CommandList_struct *c;
2747 int return_status;
2748
2749 c = cmd_alloc(h, 0);
2750 if (!c)
2751 return -ENOMEM;
b57695fe 2752 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2753 scsi3addr, cmd_type);
5390cfc3 2754 if (return_status == IO_OK)
789a424a 2755 return_status = sendcmd_withirq_core(h, c, 1);
2756
1da177e4 2757 cmd_free(h, c, 0);
7c832835 2758 return return_status;
1da177e4 2759}
7c832835 2760
1da177e4 2761static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 2762 sector_t total_size,
7c832835
BH		 2763 unsigned int block_size,
2764 InquiryData_struct *inq_buff,
2765 drive_info_struct *drv)
1da177e4
LT		 2766{
2767 int return_code;
00988a35 2768 unsigned long t;
b57695fe 2769 unsigned char scsi3addr[8];
00988a35 2770
1da177e4 2771 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2772 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2773 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2774 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2775 if (return_code == IO_OK) {
7c832835 2776 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2777 printk(KERN_WARNING
7c832835
BH		 2778 "cciss: reading geometry failed, volume "
2779 "does not support reading geometry\n");
1da177e4 2780 drv->heads = 255;
b028461d 2781 drv->sectors = 32; /* Sectors per track */
7f42d3b8 2782 drv->cylinders = total_size + 1;
89f97ad1 2783 drv->raid_level = RAID_UNKNOWN;
1da177e4 2784 } else {
1da177e4
LT		 2785 drv->heads = inq_buff->data_byte[6];
2786 drv->sectors = inq_buff->data_byte[7];
2787 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2788 drv->cylinders += inq_buff->data_byte[5];
2789 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2790 }
2791 drv->block_size = block_size;
97c06978 2792 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2793 t = drv->heads * drv->sectors;
2794 if (t > 1) {
97c06978
MMOD		 2795 sector_t real_size = total_size + 1;
2796 unsigned long rem = sector_div(real_size, t);
3f7705ea 2797 if (rem)
97c06978
MMOD		 2798 real_size++;
2799 drv->cylinders = real_size;
1da177e4 2800 }
7c832835 2801 } else { /* Get geometry failed */
1da177e4
LT		 2802 printk(KERN_WARNING "cciss: reading geometry failed\n");
2803 }
1da177e4 2804}
7c832835 2805
1da177e4 2806static void
7b838bde 2807cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
7c832835 2808 unsigned int *block_size)
1da177e4 2809{
00988a35 2810 ReadCapdata_struct *buf;
1da177e4 2811 int return_code;
b57695fe 2812 unsigned char scsi3addr[8];
1aebe187
MK		 2813
2814 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2815 if (!buf) {
00988a35
MMOD		 2816 printk(KERN_WARNING "cciss: out of memory\n");
2817 return;
2818 }
1aebe187 2819
b57695fe 2820 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2821 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2822 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2823 if (return_code == IO_OK) {
4c1f2b31
AV		 2824 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2825 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2826 } else { /* read capacity command failed */
1da177e4
LT		 2827 printk(KERN_WARNING "cciss: read capacity failed\n");
2828 *total_size = 0;
2829 *block_size = BLOCK_SIZE;
2830 }
00988a35 2831 kfree(buf);
00988a35
MMOD		 2832}
2833
7b838bde
SC		 2834static void cciss_read_capacity_16(int ctlr, int logvol,
2835 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD		 2836{
2837 ReadCapdata_struct_16 *buf;
2838 int return_code;
b57695fe 2839 unsigned char scsi3addr[8];
1aebe187
MK		 2840
2841 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2842 if (!buf) {
00988a35
MMOD		 2843 printk(KERN_WARNING "cciss: out of memory\n");
2844 return;
2845 }
1aebe187 2846
b57695fe 2847 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2848 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2849 ctlr, buf, sizeof(ReadCapdata_struct_16),
2850 0, scsi3addr, TYPE_CMD);
00988a35 2851 if (return_code == IO_OK) {
4c1f2b31
AV		 2852 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2853 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2854 } else { /* read capacity command failed */
2855 printk(KERN_WARNING "cciss: read capacity failed\n");
2856 *total_size = 0;
2857 *block_size = BLOCK_SIZE;
2858 }
7b92aadf 2859 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2860 (unsigned long long)*total_size+1, *block_size);
00988a35 2861 kfree(buf);
1da177e4
LT		 2862}
2863
1da177e4
LT		 2864static int cciss_revalidate(struct gendisk *disk)
2865{
2866 ctlr_info_t *h = get_host(disk);
2867 drive_info_struct *drv = get_drv(disk);
2868 int logvol;
7c832835 2869 int FOUND = 0;
1da177e4 2870 unsigned int block_size;
00988a35 2871 sector_t total_size;
1da177e4
LT		 2872 InquiryData_struct *inq_buff = NULL;
2873
7c832835 2874 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2875 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2876 sizeof(drv->LunID)) == 0) {
7c832835 2877 FOUND = 1;
1da177e4
LT		 2878 break;
2879 }
2880 }
2881
7c832835
BH		 2882 if (!FOUND)
2883 return 1;
1da177e4 2884
7c832835
BH		 2885 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2886 if (inq_buff == NULL) {
2887 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2888 return 1;
2889 }
00988a35 2890 if (h->cciss_read == CCISS_READ_10) {
7b838bde 2891 cciss_read_capacity(h->ctlr, logvol,
00988a35
MMOD		 2892 &total_size, &block_size);
2893 } else {
7b838bde 2894 cciss_read_capacity_16(h->ctlr, logvol,
00988a35
MMOD		 2895 &total_size, &block_size);
2896 }
7b838bde 2897 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
7c832835 2898 inq_buff, drv);
1da177e4 2899
e1defc4f 2900 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2901 set_capacity(disk, drv->nr_blocks);
2902
1da177e4
LT		 2903 kfree(inq_buff);
2904 return 0;
2905}
2906
1da177e4
LT		 2907/*
2908 * Map (physical) PCI mem into (virtual) kernel space
2909 */
2910static void __iomem *remap_pci_mem(ulong base, ulong size)
2911{
7c832835
BH		 2912 ulong page_base = ((ulong) base) & PAGE_MASK;
2913 ulong page_offs = ((ulong) base) - page_base;
2914 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2915
7c832835 2916 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2917}
2918
7c832835
BH		 2919/*
2920 * Takes jobs of the Q and sends them to the hardware, then puts it on
2921 * the Q to wait for completion.
2922 */
2923static void start_io(ctlr_info_t *h)
1da177e4
LT		 2924{
2925 CommandList_struct *c;
7c832835 2926
8a3173de
JA		 2927 while (!hlist_empty(&h->reqQ)) {
2928 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2929 /* can't do anything if fifo is full */
2930 if ((h->access.fifo_full(h))) {
2931 printk(KERN_WARNING "cciss: fifo full\n");
2932 break;
2933 }
2934
7c832835 2935 /* Get the first entry from the Request Q */
8a3173de 2936 removeQ(c);
1da177e4 2937 h->Qdepth--;
7c832835
BH		 2938
2939 /* Tell the controller execute command */
1da177e4 2940 h->access.submit_command(h, c);
7c832835
BH		 2941
2942 /* Put job onto the completed Q */
8a3173de 2943 addQ(&h->cmpQ, c);
1da177e4
LT		 2944 }
2945}
7c832835 2946
1da177e4
LT		 2947/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2948/* Zeros out the error record and then resends the command back */
2949/* to the controller */
7c832835 2950static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2951{
2952 /* erase the old error information */
2953 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2954
2955 /* add it to software queue and then send it to the controller */
8a3173de 2956 addQ(&h->reqQ, c);
1da177e4 2957 h->Qdepth++;
7c832835 2958 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2959 h->maxQsinceinit = h->Qdepth;
2960
2961 start_io(h);
2962}
a9925a06 2963
1a614f50
SC		 2964static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2965 unsigned int msg_byte, unsigned int host_byte,
2966 unsigned int driver_byte)
2967{
2968 /* inverse of macros in scsi.h */
2969 return (scsi_status_byte & 0xff) |
2970 ((msg_byte & 0xff) << 8) |
2971 ((host_byte & 0xff) << 16) |
2972 ((driver_byte & 0xff) << 24);
2973}
2974
0a9279cc
MM		 2975static inline int evaluate_target_status(ctlr_info_t *h,
2976 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2977{
2978 unsigned char sense_key;
1a614f50
SC		 2979 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2980 int error_value;
2981
0a9279cc 2982 *retry_cmd = 0;
1a614f50
SC		 2983 /* If we get in here, it means we got "target status", that is, scsi status */
2984 status_byte = cmd->err_info->ScsiStatus;
2985 driver_byte = DRIVER_OK;
2986 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2987
33659ebb 2988 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
1a614f50
SC		 2989 host_byte = DID_PASSTHROUGH;
2990 else
2991 host_byte = DID_OK;
2992
2993 error_value = make_status_bytes(status_byte, msg_byte,
2994 host_byte, driver_byte);
03bbfee5 2995
1a614f50 2996 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
33659ebb 2997 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
03bbfee5
MMOD		 2998 printk(KERN_WARNING "cciss: cmd %p "
2999 "has SCSI Status 0x%x\n",
3000 cmd, cmd->err_info->ScsiStatus);
1a614f50 3001 return error_value;
03bbfee5
MMOD		 3002 }
3003
3004 /* check the sense key */
3005 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3006 /* no status or recovered error */
33659ebb
CH		 3007 if (((sense_key == 0x0) || (sense_key == 0x1)) &&
3008 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
1a614f50 3009 error_value = 0;
03bbfee5 3010
0a9279cc 3011 if (check_for_unit_attention(h, cmd)) {
33659ebb 3012 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
0a9279cc
MM		 3013 return 0;
3014 }
3015
33659ebb
CH		 3016 /* Not SG_IO or similar? */
3017 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
1a614f50 3018 if (error_value != 0)
03bbfee5
MMOD		 3019 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3020 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3021 return error_value;
03bbfee5
MMOD		 3022 }
3023
3024 /* SG_IO or similar, copy sense data back */
3025 if (cmd->rq->sense) {
3026 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3027 cmd->rq->sense_len = cmd->err_info->SenseLen;
3028 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3029 cmd->rq->sense_len);
3030 } else
3031 cmd->rq->sense_len = 0;
3032
1a614f50 3033 return error_value;
03bbfee5
MMOD		 3034}
3035
7c832835 3036/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3037 * buffers for the completed job. Note that this function does not need
3038 * to hold the hba/queue lock.
7c832835
BH		 3039 */
3040static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3041 int timeout)
1da177e4 3042{
1da177e4 3043 int retry_cmd = 0;
198b7660
MMOD		 3044 struct request *rq = cmd->rq;
3045
3046 rq->errors = 0;
7c832835 3047
1da177e4 3048 if (timeout)
1a614f50 3049 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3050
d38ae168
MMOD		 3051 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3052 goto after_error_processing;
7c832835 3053
d38ae168 3054 switch (cmd->err_info->CommandStatus) {
d38ae168 3055 case CMD_TARGET_STATUS:
0a9279cc 3056 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3057 break;
3058 case CMD_DATA_UNDERRUN:
33659ebb 3059 if (cmd->rq->cmd_type == REQ_TYPE_FS) {
03bbfee5
MMOD		 3060 printk(KERN_WARNING "cciss: cmd %p has"
3061 " completed with data underrun "
3062 "reported\n", cmd);
c3a4d78c 3063 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3064 }
d38ae168
MMOD		 3065 break;
3066 case CMD_DATA_OVERRUN:
33659ebb 3067 if (cmd->rq->cmd_type == REQ_TYPE_FS)
03bbfee5
MMOD		 3068 printk(KERN_WARNING "cciss: cmd %p has"
3069 " completed with data overrun "
3070 "reported\n", cmd);
d38ae168
MMOD		 3071 break;
3072 case CMD_INVALID:
3073 printk(KERN_WARNING "cciss: cmd %p is "
3074 "reported invalid\n", cmd);
1a614f50
SC		 3075 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3076 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3077 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3078 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3079 break;
3080 case CMD_PROTOCOL_ERR:
3081 printk(KERN_WARNING "cciss: cmd %p has "
3082 "protocol error \n", cmd);
1a614f50
SC		 3083 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3084 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3085 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3086 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3087 break;
3088 case CMD_HARDWARE_ERR:
3089 printk(KERN_WARNING "cciss: cmd %p had "
3090 " hardware error\n", cmd);
1a614f50
SC		 3091 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3092 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3093 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3094 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3095 break;
3096 case CMD_CONNECTION_LOST:
3097 printk(KERN_WARNING "cciss: cmd %p had "
3098 "connection lost\n", cmd);
1a614f50
SC		 3099 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3100 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3101 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3102 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3103 break;
3104 case CMD_ABORTED:
3105 printk(KERN_WARNING "cciss: cmd %p was "
3106 "aborted\n", cmd);
1a614f50
SC		 3107 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3108 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3109 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3110 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3111 break;
3112 case CMD_ABORT_FAILED:
3113 printk(KERN_WARNING "cciss: cmd %p reports "
3114 "abort failed\n", cmd);
1a614f50
SC		 3115 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3116 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3117 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3118 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3119 break;
3120 case CMD_UNSOLICITED_ABORT:
3121 printk(KERN_WARNING "cciss%d: unsolicited "
3122 "abort %p\n", h->ctlr, cmd);
3123 if (cmd->retry_count < MAX_CMD_RETRIES) {
3124 retry_cmd = 1;
3125 printk(KERN_WARNING
3126 "cciss%d: retrying %p\n", h->ctlr, cmd);
3127 cmd->retry_count++;
3128 } else
3129 printk(KERN_WARNING
3130 "cciss%d: %p retried too "
3131 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3132 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3133 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3134 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3135 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3136 break;
3137 case CMD_TIMEOUT:
3138 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3139 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3140 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3141 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3142 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3143 break;
3144 default:
3145 printk(KERN_WARNING "cciss: cmd %p returned "
3146 "unknown status %x\n", cmd,
3147 cmd->err_info->CommandStatus);
1a614f50
SC		 3148 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3149 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3150 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3151 DID_PASSTHROUGH : DID_ERROR);
1da177e4 3152 }
d38ae168
MMOD		 3153
3154after_error_processing:
3155
1da177e4 3156 /* We need to return this command */
7c832835
BH		 3157 if (retry_cmd) {
3158 resend_cciss_cmd(h, cmd);
1da177e4 3159 return;
7c832835 3160 }
03bbfee5 3161 cmd->rq->completion_data = cmd;
a9925a06 3162 blk_complete_request(cmd->rq);
1da177e4
LT		 3163}
3164
0c2b3908
MM		 3165static inline u32 cciss_tag_contains_index(u32 tag)
3166{
5e216153 3167#define DIRECT_LOOKUP_BIT 0x10
0c2b3908
MM		 3168 return tag & DIRECT_LOOKUP_BIT;
3169}
3170
3171static inline u32 cciss_tag_to_index(u32 tag)
3172{
5e216153 3173#define DIRECT_LOOKUP_SHIFT 5
0c2b3908
MM		 3174 return tag >> DIRECT_LOOKUP_SHIFT;
3175}
3176
3177static inline u32 cciss_tag_discard_error_bits(u32 tag)
3178{
3179#define CCISS_ERROR_BITS 0x03
3180 return tag & ~CCISS_ERROR_BITS;
3181}
3182
3183static inline void cciss_mark_tag_indexed(u32 *tag)
3184{
3185 *tag |= DIRECT_LOOKUP_BIT;
3186}
3187
3188static inline void cciss_set_tag_index(u32 *tag, u32 index)
3189{
3190 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3191}
3192
7c832835
BH		 3193/*
3194 * Get a request and submit it to the controller.
1da177e4 3195 */
165125e1 3196static void do_cciss_request(struct request_queue *q)
1da177e4 3197{
7c832835 3198 ctlr_info_t *h = q->queuedata;
1da177e4 3199 CommandList_struct *c;
00988a35
MMOD		 3200 sector_t start_blk;
3201 int seg;
1da177e4
LT		 3202 struct request *creq;
3203 u64bit temp64;
5c07a311
DB		 3204 struct scatterlist *tmp_sg;
3205 SGDescriptor_struct *curr_sg;
1da177e4
LT		 3206 drive_info_struct *drv;
3207 int i, dir;
5c07a311
DB		 3208 int sg_index = 0;
3209 int chained = 0;
1da177e4
LT		 3210
3211 /* We call start_io here in case there is a command waiting on the
3212 * queue that has not been sent.
7c832835 3213 */
1da177e4
LT		 3214 if (blk_queue_plugged(q))
3215 goto startio;
3216
7c832835 3217 queue:
9934c8c0 3218 creq = blk_peek_request(q);
1da177e4
LT		 3219 if (!creq)
3220 goto startio;
3221
5c07a311 3222 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
1da177e4 3223
7c832835 3224 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3225 goto full;
3226
9934c8c0 3227 blk_start_request(creq);
1da177e4 3228
5c07a311 3229 tmp_sg = h->scatter_list[c->cmdindex];
1da177e4
LT		 3230 spin_unlock_irq(q->queue_lock);
3231
3232 c->cmd_type = CMD_RWREQ;
3233 c->rq = creq;
7c832835
BH		 3234
3235 /* fill in the request */
1da177e4 3236 drv = creq->rq_disk->private_data;
b028461d 3237 c->Header.ReplyQueue = 0; /* unused in simple mode */
33079b21
MM		 3238 /* got command from pool, so use the command block index instead */
3239 /* for direct lookups. */
3240 /* The first 2 bits are reserved for controller error reporting. */
0c2b3908
MM		 3241 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3242 cciss_mark_tag_indexed(&c->Header.Tag.lower);
39ccf9a6 3243 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
b028461d 3244 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3245 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
7c832835
BH		 3246 c->Request.Type.Attribute = ATTR_SIMPLE;
3247 c->Request.Type.Direction =
a52de245 3248 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
b028461d 3249 c->Request.Timeout = 0; /* Don't time out */
7c832835 3250 c->Request.CDB[0] =
00988a35 3251 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3252 start_blk = blk_rq_pos(creq);
1da177e4 3253#ifdef CCISS_DEBUG
83096ebf
TH		 3254 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3255 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3256#endif /* CCISS_DEBUG */
1da177e4 3257
5c07a311 3258 sg_init_table(tmp_sg, h->maxsgentries);
1da177e4
LT		 3259 seg = blk_rq_map_sg(q, creq, tmp_sg);
3260
7c832835 3261 /* get the DMA records for the setup */
1da177e4
LT		 3262 if (c->Request.Type.Direction == XFER_READ)
3263 dir = PCI_DMA_FROMDEVICE;
3264 else
3265 dir = PCI_DMA_TODEVICE;
3266
5c07a311
DB		 3267 curr_sg = c->SG;
3268 sg_index = 0;
3269 chained = 0;
3270
7c832835 3271 for (i = 0; i < seg; i++) {
5c07a311
DB		 3272 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3273 !chained && ((seg - i) > 1)) {
5c07a311 3274 /* Point to next chain block. */
dccc9b56 3275 curr_sg = h->cmd_sg_list[c->cmdindex];
5c07a311
DB		 3276 sg_index = 0;
3277 chained = 1;
3278 }
3279 curr_sg[sg_index].Len = tmp_sg[i].length;
45711f1a 3280 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
5c07a311
DB		 3281 tmp_sg[i].offset,
3282 tmp_sg[i].length, dir);
3283 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3284 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3285 curr_sg[sg_index].Ext = 0; /* we are not chaining */
5c07a311 3286 ++sg_index;
1da177e4 3287 }
d45033ef
SC		 3288 if (chained)
3289 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3290 (seg - (h->max_cmd_sgentries - 1)) *
3291 sizeof(SGDescriptor_struct));
5c07a311 3292
7c832835
BH		 3293 /* track how many SG entries we are using */
3294 if (seg > h->maxSG)
3295 h->maxSG = seg;
1da177e4
LT		 3296
3297#ifdef CCISS_DEBUG
5c07a311
DB		 3298 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3299 "chained[%d]\n",
3300 blk_rq_sectors(creq), seg, chained);
7c832835 3301#endif /* CCISS_DEBUG */
1da177e4 3302
5e216153
MM		 3303 c->Header.SGTotal = seg + chained;
3304 if (seg <= h->max_cmd_sgentries)
3305 c->Header.SGList = c->Header.SGTotal;
3306 else
5c07a311 3307 c->Header.SGList = h->max_cmd_sgentries;
5e216153 3308 set_performant_mode(h, c);
5c07a311 3309
33659ebb 3310 if (likely(creq->cmd_type == REQ_TYPE_FS)) {
03bbfee5
MMOD		 3311 if(h->cciss_read == CCISS_READ_10) {
3312 c->Request.CDB[1] = 0;
b028461d 3313 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
03bbfee5
MMOD		 3314 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3315 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3316 c->Request.CDB[5] = start_blk & 0xff;
b028461d 3317 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
83096ebf
TH		 3318 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3319 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3320 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3321 } else {
582539e5
RD		 3322 u32 upper32 = upper_32_bits(start_blk);
3323
03bbfee5
MMOD		 3324 c->Request.CDBLen = 16;
3325 c->Request.CDB[1]= 0;
b028461d 3326 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
582539e5
RD		 3327 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3328 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3329 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3330 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3331 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3332 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3333 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3334 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3335 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3336 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3337 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3338 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3339 }
33659ebb 3340 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
03bbfee5
MMOD		 3341 c->Request.CDBLen = creq->cmd_len;
3342 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3343 } else {
03bbfee5
MMOD		 3344 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3345 BUG();
00988a35 3346 }
1da177e4
LT		 3347
3348 spin_lock_irq(q->queue_lock);
3349
8a3173de 3350 addQ(&h->reqQ, c);
1da177e4 3351 h->Qdepth++;
7c832835
BH		 3352 if (h->Qdepth > h->maxQsinceinit)
3353 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3354
3355 goto queue;
00988a35 3356full:
1da177e4 3357 blk_stop_queue(q);
00988a35 3358startio:
1da177e4
LT		 3359 /* We will already have the driver lock here so not need
3360 * to lock it.
7c832835 3361 */
1da177e4
LT		 3362 start_io(h);
3363}
3364
3da8b713 3365static inline unsigned long get_next_completion(ctlr_info_t *h)
3366{
3da8b713 3367 return h->access.command_completed(h);
3da8b713 3368}
3369
3370static inline int interrupt_pending(ctlr_info_t *h)
3371{
3da8b713 3372 return h->access.intr_pending(h);
3da8b713 3373}
3374
3375static inline long interrupt_not_for_us(ctlr_info_t *h)
3376{
2cf3af1c
MM		 3377 return !(h->msi_vector || h->msix_vector) &&
3378 ((h->access.intr_pending(h) == 0) ||
3379 (h->interrupts_enabled == 0));
3da8b713 3380}
3381
0c2b3908
MM		 3382static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3383 u32 raw_tag)
1da177e4 3384{
0c2b3908
MM		 3385 if (unlikely(tag_index >= h->nr_cmds)) {
3386 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3387 return 1;
3388 }
3389 return 0;
3390}
3391
3392static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3393 u32 raw_tag)
3394{
3395 removeQ(c);
3396 if (likely(c->cmd_type == CMD_RWREQ))
3397 complete_command(h, c, 0);
3398 else if (c->cmd_type == CMD_IOCTL_PEND)
3399 complete(c->waiting);
3400#ifdef CONFIG_CISS_SCSI_TAPE
3401 else if (c->cmd_type == CMD_SCSI)
3402 complete_scsi_command(c, 0, raw_tag);
3403#endif
3404}
3405
29979a71
MM		 3406static inline u32 next_command(ctlr_info_t *h)
3407{
3408 u32 a;
3409
3410 if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
3411 return h->access.command_completed(h);
3412
3413 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
3414 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
3415 (h->reply_pool_head)++;
3416 h->commands_outstanding--;
3417 } else {
3418 a = FIFO_EMPTY;
3419 }
3420 /* Check for wraparound */
3421 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
3422 h->reply_pool_head = h->reply_pool;
3423 h->reply_pool_wraparound ^= 1;
3424 }
3425 return a;
3426}
3427
0c2b3908
MM		 3428/* process completion of an indexed ("direct lookup") command */
3429static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3430{
3431 u32 tag_index;
1da177e4 3432 CommandList_struct *c;
0c2b3908
MM		 3433
3434 tag_index = cciss_tag_to_index(raw_tag);
3435 if (bad_tag(h, tag_index, raw_tag))
5e216153 3436 return next_command(h);
0c2b3908
MM		 3437 c = h->cmd_pool + tag_index;
3438 finish_cmd(h, c, raw_tag);
5e216153 3439 return next_command(h);
0c2b3908
MM		 3440}
3441
3442/* process completion of a non-indexed command */
3443static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3444{
3445 u32 tag;
3446 CommandList_struct *c = NULL;
3447 struct hlist_node *tmp;
3448 __u32 busaddr_masked, tag_masked;
3449
3450 tag = cciss_tag_discard_error_bits(raw_tag);
3451 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3452 busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
3453 tag_masked = cciss_tag_discard_error_bits(tag);
3454 if (busaddr_masked == tag_masked) {
3455 finish_cmd(h, c, raw_tag);
5e216153 3456 return next_command(h);
0c2b3908
MM		 3457 }
3458 }
3459 bad_tag(h, h->nr_cmds + 1, raw_tag);
5e216153 3460 return next_command(h);
0c2b3908
MM		 3461}
3462
3463static irqreturn_t do_cciss_intx(int irq, void *dev_id)
3464{
3465 ctlr_info_t *h = dev_id;
1da177e4 3466 unsigned long flags;
0c2b3908 3467 u32 raw_tag;
1da177e4 3468
3da8b713 3469 if (interrupt_not_for_us(h))
1da177e4 3470 return IRQ_NONE;
1da177e4
LT		 3471 /*
3472 * If there are completed commands in the completion queue,
3473 * we had better do something about it.
3474 */
3475 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3476 while (interrupt_pending(h)) {
0c2b3908
MM		 3477 raw_tag = get_next_completion(h);
3478 while (raw_tag != FIFO_EMPTY) {
3479 if (cciss_tag_contains_index(raw_tag))
3480 raw_tag = process_indexed_cmd(h, raw_tag);
3481 else
3482 raw_tag = process_nonindexed_cmd(h, raw_tag);
3483 }
3484 }
33079b21 3485
0c2b3908
MM		 3486 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3487 return IRQ_HANDLED;
3488}
33079b21 3489
0c2b3908
MM		 3490/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3491 * check the interrupt pending register because it is not set.
3492 */
3493static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3494{
3495 ctlr_info_t *h = dev_id;
3496 unsigned long flags;
3497 u32 raw_tag;
8a3173de 3498
0c2b3908
MM		 3499 if (interrupt_not_for_us(h))
3500 return IRQ_NONE;
3501 /*
3502 * If there are completed commands in the completion queue,
3503 * we had better do something about it.
3504 */
3505 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3506 raw_tag = get_next_completion(h);
3507 while (raw_tag != FIFO_EMPTY) {
3508 if (cciss_tag_contains_index(raw_tag))
3509 raw_tag = process_indexed_cmd(h, raw_tag);
3510 else
3511 raw_tag = process_nonindexed_cmd(h, raw_tag);
1da177e4
LT		 3512 }
3513
1da177e4
LT		 3514 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3515 return IRQ_HANDLED;
3516}
7c832835 3517
b368c9dd
AP		 3518/**
3519 * add_to_scan_list() - add controller to rescan queue
3520 * @h: Pointer to the controller.
3521 *
3522 * Adds the controller to the rescan queue if not already on the queue.
3523 *
3524 * returns 1 if added to the queue, 0 if skipped (could be on the
3525 * queue already, or the controller could be initializing or shutting
3526 * down).
3527 **/
3528static int add_to_scan_list(struct ctlr_info *h)
3529{
3530 struct ctlr_info *test_h;
3531 int found = 0;
3532 int ret = 0;
3533
3534 if (h->busy_initializing)
3535 return 0;
3536
3537 if (!mutex_trylock(&h->busy_shutting_down))
3538 return 0;
3539
3540 mutex_lock(&scan_mutex);
3541 list_for_each_entry(test_h, &scan_q, scan_list) {
3542 if (test_h == h) {
3543 found = 1;
3544 break;
3545 }
3546 }
3547 if (!found && !h->busy_scanning) {
3548 INIT_COMPLETION(h->scan_wait);
3549 list_add_tail(&h->scan_list, &scan_q);
3550 ret = 1;
3551 }
3552 mutex_unlock(&scan_mutex);
3553 mutex_unlock(&h->busy_shutting_down);
3554
3555 return ret;
3556}
3557
3558/**
3559 * remove_from_scan_list() - remove controller from rescan queue
3560 * @h: Pointer to the controller.
3561 *
3562 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC		 3563 * the controller is currently conducting a rescan. The controller
3564 * can be in one of three states:
3565 * 1. Doesn't need a scan
3566 * 2. On the scan list, but not scanning yet (we remove it)
3567 * 3. Busy scanning (and not on the list). In this case we want to wait for
3568 * the scan to complete to make sure the scanning thread for this
3569 * controller is completely idle.
b368c9dd
AP		 3570 **/
3571static void remove_from_scan_list(struct ctlr_info *h)
3572{
3573 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP		 3574
3575 mutex_lock(&scan_mutex);
3576 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3577 if (test_h == h) { /* state 2. */
b368c9dd
AP		 3578 list_del(&h->scan_list);
3579 complete_all(&h->scan_wait);
3580 mutex_unlock(&scan_mutex);
3581 return;
3582 }
3583 }
fd8489cf
SC		 3584 if (h->busy_scanning) { /* state 3. */
3585 mutex_unlock(&scan_mutex);
b368c9dd 3586 wait_for_completion(&h->scan_wait);
fd8489cf
SC		 3587 } else { /* state 1, nothing to do. */
3588 mutex_unlock(&scan_mutex);
3589 }
b368c9dd
AP		 3590}
3591
3592/**
3593 * scan_thread() - kernel thread used to rescan controllers
3594 * @data: Ignored.
3595 *
3596 * A kernel thread used scan for drive topology changes on
3597 * controllers. The thread processes only one controller at a time
3598 * using a queue. Controllers are added to the queue using
3599 * add_to_scan_list() and removed from the queue either after done
3600 * processing or using remove_from_scan_list().
3601 *
3602 * returns 0.
3603 **/
0a9279cc
MM		 3604static int scan_thread(void *data)
3605{
b368c9dd 3606 struct ctlr_info *h;
0a9279cc 3607
b368c9dd
AP		 3608 while (1) {
3609 set_current_state(TASK_INTERRUPTIBLE);
3610 schedule();
0a9279cc
MM		 3611 if (kthread_should_stop())
3612 break;
b368c9dd
AP		 3613
3614 while (1) {
3615 mutex_lock(&scan_mutex);
3616 if (list_empty(&scan_q)) {
3617 mutex_unlock(&scan_mutex);
3618 break;
3619 }
3620
3621 h = list_entry(scan_q.next,
3622 struct ctlr_info,
3623 scan_list);
3624 list_del(&h->scan_list);
3625 h->busy_scanning = 1;
3626 mutex_unlock(&scan_mutex);
3627
d06dfbd2
SC		 3628 rebuild_lun_table(h, 0, 0);
3629 complete_all(&h->scan_wait);
3630 mutex_lock(&scan_mutex);
3631 h->busy_scanning = 0;
3632 mutex_unlock(&scan_mutex);
b368c9dd 3633 }
0a9279cc 3634 }
b368c9dd 3635
0a9279cc
MM		 3636 return 0;
3637}
3638
3639static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3640{
3641 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3642 return 0;
3643
3644 switch (c->err_info->SenseInfo[12]) {
3645 case STATE_CHANGED:
3646 printk(KERN_WARNING "cciss%d: a state change "
3647 "detected, command retried\n", h->ctlr);
3648 return 1;
3649 break;
3650 case LUN_FAILED:
3651 printk(KERN_WARNING "cciss%d: LUN failure "
3652 "detected, action required\n", h->ctlr);
3653 return 1;
3654 break;
3655 case REPORT_LUNS_CHANGED:
3656 printk(KERN_WARNING "cciss%d: report LUN data "
3657 "changed\n", h->ctlr);
da002184
SC		 3658 /*
3659 * Here, we could call add_to_scan_list and wake up the scan thread,
3660 * except that it's quite likely that we will get more than one
3661 * REPORT_LUNS_CHANGED condition in quick succession, which means
3662 * that those which occur after the first one will likely happen
3663 * *during* the scan_thread's rescan. And the rescan code is not
3664 * robust enough to restart in the middle, undoing what it has already
3665 * done, and it's not clear that it's even possible to do this, since
3666 * part of what it does is notify the block layer, which starts
3667 * doing it's own i/o to read partition tables and so on, and the
3668 * driver doesn't have visibility to know what might need undoing.
3669 * In any event, if possible, it is horribly complicated to get right
3670 * so we just don't do it for now.
3671 *
3672 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3673 */
0a9279cc
MM		 3674 return 1;
3675 break;
3676 case POWER_OR_RESET:
3677 printk(KERN_WARNING "cciss%d: a power on "
3678 "or device reset detected\n", h->ctlr);
3679 return 1;
3680 break;
3681 case UNIT_ATTENTION_CLEARED:
3682 printk(KERN_WARNING "cciss%d: unit attention "
3683 "cleared by another initiator\n", h->ctlr);
3684 return 1;
3685 break;
3686 default:
3687 printk(KERN_WARNING "cciss%d: unknown "
3688 "unit attention detected\n", h->ctlr);
3689 return 1;
3690 }
3691}
3692
7c832835 3693/*
d14c4ab5 3694 * We cannot read the structure directly, for portability we must use
1da177e4 3695 * the io functions.
7c832835 3696 * This is for debug only.
1da177e4
LT		 3697 */
3698#ifdef CCISS_DEBUG
7c832835 3699static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3700{
3701 int i;
3702 char temp_name[17];
3703
3704 printk("Controller Configuration information\n");
3705 printk("------------------------------------\n");
7c832835 3706 for (i = 0; i < 4; i++)
1da177e4 3707 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3708 temp_name[4] = '\0';
3709 printk(" Signature = %s\n", temp_name);
1da177e4 3710 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3711 printk(" Transport methods supported = 0x%x\n",
3712 readl(&(tb->TransportSupport)));
3713 printk(" Transport methods active = 0x%x\n",
3714 readl(&(tb->TransportActive)));
3715 printk(" Requested transport Method = 0x%x\n",
3716 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3717 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3718 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3719 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3720 readl(&(tb->HostWrite.CoalIntCount)));
3721 printk(" Max outstanding commands = 0x%d\n",
3722 readl(&(tb->CmdsOutMax)));
3723 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3724 for (i = 0; i < 16; i++)
1da177e4
LT		 3725 temp_name[i] = readb(&(tb->ServerName[i]));
3726 temp_name[16] = '\0';
3727 printk(" Server Name = %s\n", temp_name);
7c832835 3728 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3729}
7c832835 3730#endif /* CCISS_DEBUG */
1da177e4 3731
7c832835 3732static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3733{
3734 int i, offset, mem_type, bar_type;
7c832835 3735 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3736 return 0;
3737 offset = 0;
7c832835
BH		 3738 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3739 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3740 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3741 offset += 4;
3742 else {
3743 mem_type = pci_resource_flags(pdev, i) &
7c832835 3744 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3745 switch (mem_type) {
7c832835
BH		 3746 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3747 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3748 offset += 4; /* 32 bit */
3749 break;
3750 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3751 offset += 8;
3752 break;
3753 default: /* reserved in PCI 2.2 */
3754 printk(KERN_WARNING
3755 "Base address is invalid\n");
3756 return -1;
1da177e4
LT		 3757 break;
3758 }
3759 }
7c832835
BH		 3760 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3761 return i + 1;
1da177e4
LT		 3762 }
3763 return -1;
3764}
3765
5e216153
MM		 3766/* Fill in bucket_map[], given nsgs (the max number of
3767 * scatter gather elements supported) and bucket[],
3768 * which is an array of 8 integers. The bucket[] array
3769 * contains 8 different DMA transfer sizes (in 16
3770 * byte increments) which the controller uses to fetch
3771 * commands. This function fills in bucket_map[], which
3772 * maps a given number of scatter gather elements to one of
3773 * the 8 DMA transfer sizes. The point of it is to allow the
3774 * controller to only do as much DMA as needed to fetch the
3775 * command, with the DMA transfer size encoded in the lower
3776 * bits of the command address.
3777 */
3778static void calc_bucket_map(int bucket[], int num_buckets,
3779 int nsgs, int *bucket_map)
3780{
3781 int i, j, b, size;
3782
3783 /* even a command with 0 SGs requires 4 blocks */
3784#define MINIMUM_TRANSFER_BLOCKS 4
3785#define NUM_BUCKETS 8
3786 /* Note, bucket_map must have nsgs+1 entries. */
3787 for (i = 0; i <= nsgs; i++) {
3788 /* Compute size of a command with i SG entries */
3789 size = i + MINIMUM_TRANSFER_BLOCKS;
3790 b = num_buckets; /* Assume the biggest bucket */
3791 /* Find the bucket that is just big enough */
3792 for (j = 0; j < 8; j++) {
3793 if (bucket[j] >= size) {
3794 b = j;
3795 break;
3796 }
3797 }
3798 /* for a command with i SG entries, use bucket b. */
3799 bucket_map[i] = b;
3800 }
3801}
3802
3803static void
3804cciss_put_controller_into_performant_mode(ctlr_info_t *h)
3805{
3806 int l = 0;
3807 __u32 trans_support;
3808 __u32 trans_offset;
3809 /*
3810 * 5 = 1 s/g entry or 4k
3811 * 6 = 2 s/g entry or 8k
3812 * 8 = 4 s/g entry or 16k
3813 * 10 = 6 s/g entry or 24k
3814 */
3815 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
3816 unsigned long register_value;
3817
3818 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
3819
3820 /* Attempt to put controller into performant mode if supported */
3821 /* Does board support performant mode? */
3822 trans_support = readl(&(h->cfgtable->TransportSupport));
3823 if (!(trans_support & PERFORMANT_MODE))
3824 return;
3825
3826 printk(KERN_WARNING "cciss%d: Placing controller into "
3827 "performant mode\n", h->ctlr);
3828 /* Performant mode demands commands on a 32 byte boundary
3829 * pci_alloc_consistent aligns on page boundarys already.
3830 * Just need to check if divisible by 32
3831 */
3832 if ((sizeof(CommandList_struct) % 32) != 0) {
3833 printk(KERN_WARNING "%s %d %s\n",
3834 "cciss info: command size[",
3835 (int)sizeof(CommandList_struct),
3836 "] not divisible by 32, no performant mode..\n");
3837 return;
3838 }
3839
3840 /* Performant mode ring buffer and supporting data structures */
3841 h->reply_pool = (__u64 *)pci_alloc_consistent(
3842 h->pdev, h->max_commands * sizeof(__u64),
3843 &(h->reply_pool_dhandle));
3844
3845 /* Need a block fetch table for performant mode */
3846 h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
3847 sizeof(__u32)), GFP_KERNEL);
3848
3849 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
3850 goto clean_up;
3851
3852 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3853
3854 /* Controller spec: zero out this buffer. */
3855 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
3856 h->reply_pool_head = h->reply_pool;
3857
3858 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3859 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
3860 h->blockFetchTable);
3861 writel(bft[0], &h->transtable->BlockFetch0);
3862 writel(bft[1], &h->transtable->BlockFetch1);
3863 writel(bft[2], &h->transtable->BlockFetch2);
3864 writel(bft[3], &h->transtable->BlockFetch3);
3865 writel(bft[4], &h->transtable->BlockFetch4);
3866 writel(bft[5], &h->transtable->BlockFetch5);
3867 writel(bft[6], &h->transtable->BlockFetch6);
3868 writel(bft[7], &h->transtable->BlockFetch7);
3869
3870 /* size of controller ring buffer */
3871 writel(h->max_commands, &h->transtable->RepQSize);
3872 writel(1, &h->transtable->RepQCount);
3873 writel(0, &h->transtable->RepQCtrAddrLow32);
3874 writel(0, &h->transtable->RepQCtrAddrHigh32);
3875 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3876 writel(0, &h->transtable->RepQAddr0High32);
3877 writel(CFGTBL_Trans_Performant,
3878 &(h->cfgtable->HostWrite.TransportRequest));
3879
3880 h->transMethod = CFGTBL_Trans_Performant;
3881 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3882 /* under certain very rare conditions, this can take awhile.
3883 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3884 * as we enter this code.) */
3885 for (l = 0; l < MAX_CONFIG_WAIT; l++) {
3886 register_value = readl(h->vaddr + SA5_DOORBELL);
3887 if (!(register_value & CFGTBL_ChangeReq))
3888 break;
3889 /* delay and try again */
3890 set_current_state(TASK_INTERRUPTIBLE);
3891 schedule_timeout(10);
3892 }
3893 register_value = readl(&(h->cfgtable->TransportActive));
3894 if (!(register_value & CFGTBL_Trans_Performant)) {
3895 printk(KERN_WARNING "cciss: unable to get board into"
3896 " performant mode\n");
3897 return;
3898 }
3899
3900 /* Change the access methods to the performant access methods */
3901 h->access = SA5_performant_access;
3902
3903 return;
3904clean_up:
3905 kfree(h->blockFetchTable);
3906 if (h->reply_pool)
3907 pci_free_consistent(h->pdev,
3908 h->max_commands * sizeof(__u64),
3909 h->reply_pool,
3910 h->reply_pool_dhandle);
3911 return;
3912
3913} /* cciss_put_controller_into_performant_mode */
3914
fb86a35b
MM		 3915/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3916 * controllers that are capable. If not, we use IO-APIC mode.
3917 */
3918
7c832835
BH		 3919static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3920 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3921{
3922#ifdef CONFIG_PCI_MSI
7c832835
BH		 3923 int err;
3924 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3925 {0, 2}, {0, 3}
3926 };
fb86a35b
MM		 3927
3928 /* Some boards advertise MSI but don't really support it */
3929 if ((board_id == 0x40700E11) ||
7c832835
BH		 3930 (board_id == 0x40800E11) ||
3931 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3932 goto default_int_mode;
3933
7c832835
BH		 3934 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3935 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3936 if (!err) {
3937 c->intr[0] = cciss_msix_entries[0].vector;
3938 c->intr[1] = cciss_msix_entries[1].vector;
3939 c->intr[2] = cciss_msix_entries[2].vector;
3940 c->intr[3] = cciss_msix_entries[3].vector;
3941 c->msix_vector = 1;
3942 return;
3943 }
3944 if (err > 0) {
3945 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3946 "available\n", err);
1ecb9c0f 3947 goto default_int_mode;
7c832835
BH		 3948 } else {
3949 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3950 err);
1ecb9c0f 3951 goto default_int_mode;
7c832835
BH		 3952 }
3953 }
3954 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3955 if (!pci_enable_msi(pdev)) {
7c832835 3956 c->msi_vector = 1;
7c832835
BH		 3957 } else {
3958 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3959 }
3960 }
1ecb9c0f 3961default_int_mode:
7c832835 3962#endif /* CONFIG_PCI_MSI */
fb86a35b 3963 /* if we get here we're going to use the default interrupt mode */
5e216153 3964 c->intr[PERF_MODE_INT] = pdev->irq;
fb86a35b
MM		 3965 return;
3966}
3967
7d1fd970 3968static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3969{
3970 ushort subsystem_vendor_id, subsystem_device_id, command;
3971 __u32 board_id, scratchpad = 0;
3972 __u64 cfg_offset;
3973 __u32 cfg_base_addr;
3974 __u64 cfg_base_addr_index;
2ec24ff1 3975 int i, prod_index, err;
5e216153 3976 __u32 trans_offset;
2ec24ff1
SC		 3977
3978 subsystem_vendor_id = pdev->subsystem_vendor;
3979 subsystem_device_id = pdev->subsystem_device;
3980 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3981 subsystem_vendor_id);
3982
3983 for (i = 0; i < ARRAY_SIZE(products); i++) {
3984 /* Stand aside for hpsa driver on request */
3985 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3986 return -ENODEV;
3987 if (board_id == products[i].board_id)
3988 break;
3989 }
3990 prod_index = i;
3991 if (prod_index == ARRAY_SIZE(products)) {
3992 dev_warn(&pdev->dev,
3993 "unrecognized board ID: 0x%08lx, ignoring.\n",
3994 (unsigned long) board_id);
3995 return -ENODEV;
3996 }
1da177e4
LT		 3997
3998 /* check to see if controller has been disabled */
3999 /* BEFORE trying to enable it */
7c832835
BH		 4000 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
4001 if (!(command & 0x02)) {
4002 printk(KERN_WARNING
4003 "cciss: controller appears to be disabled\n");
c33ac89b 4004 return -ENODEV;
1da177e4
LT		 4005 }
4006
c33ac89b 4007 err = pci_enable_device(pdev);
7c832835 4008 if (err) {
1da177e4 4009 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 4010 return err;
1da177e4 4011 }
1da177e4 4012
4e570309
BH		 4013 err = pci_request_regions(pdev, "cciss");
4014 if (err) {
4015 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 4016 "aborting\n");
872225ca 4017 return err;
4e570309
BH		 4018 }
4019
1da177e4
LT		 4020#ifdef CCISS_DEBUG
4021 printk("command = %x\n", command);
4022 printk("irq = %x\n", pdev->irq);
4023 printk("board_id = %x\n", board_id);
7c832835 4024#endif /* CCISS_DEBUG */
1da177e4 4025
fb86a35b
MM		 4026/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
4027 * else we use the IO-APIC interrupt assigned to us by system ROM.
4028 */
4029 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 4030
e1438581
MM		 4031 /* find the memory BAR */
4032 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
4033 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
4034 break;
4035 }
4036 if (i == DEVICE_COUNT_RESOURCE) {
4037 printk(KERN_WARNING "cciss: No memory BAR found\n");
4038 err = -ENODEV;
4039 goto err_out_free_res;
4040 }
4041
4042 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
4043 * already removed
4044 */
1da177e4 4045
1da177e4 4046#ifdef CCISS_DEBUG
9f92f471 4047 printk("address 0 = %lx\n", c->paddr);
7c832835 4048#endif /* CCISS_DEBUG */
a5b92873 4049 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 4050
4051 /* Wait for the board to become ready. (PCI hotplug needs this.)
4052 * We poll for up to 120 secs, once per 100ms. */
7c832835 4053 for (i = 0; i < 1200; i++) {
1da177e4
LT		 4054 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
4055 if (scratchpad == CCISS_FIRMWARE_READY)
4056 break;
4057 set_current_state(TASK_INTERRUPTIBLE);
4d761609 4058 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 4059 }
4060 if (scratchpad != CCISS_FIRMWARE_READY) {
4061 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 4062 err = -ENODEV;
4e570309 4063 goto err_out_free_res;
1da177e4
LT		 4064 }
4065
4066 /* get the address index number */
4067 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
4068 cfg_base_addr &= (__u32) 0x0000ffff;
4069#ifdef CCISS_DEBUG
4070 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 4071#endif /* CCISS_DEBUG */
4072 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 4073#ifdef CCISS_DEBUG
9f92f471
RD		 4074 printk("cfg base address index = %llx\n",
4075 (unsigned long long)cfg_base_addr_index);
7c832835 4076#endif /* CCISS_DEBUG */
1da177e4
LT		 4077 if (cfg_base_addr_index == -1) {
4078 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 4079 err = -ENODEV;
4e570309 4080 goto err_out_free_res;
1da177e4
LT		 4081 }
4082
4083 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
4084#ifdef CCISS_DEBUG
9f92f471 4085 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 4086#endif /* CCISS_DEBUG */
4087 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
4088 cfg_base_addr_index) +
4089 cfg_offset, sizeof(CfgTable_struct));
5e216153
MM		 4090 /* Find performant mode table. */
4091 trans_offset = readl(&(c->cfgtable->TransMethodOffset));
4092 c->transtable = remap_pci_mem(pci_resource_start(pdev,
4093 cfg_base_addr_index) + cfg_offset+trans_offset,
4094 sizeof(*c->transtable));
1da177e4
LT		 4095 c->board_id = board_id;
4096
5e216153
MM		 4097 #ifdef CCISS_DEBUG
4098 print_cfg_table(c->cfgtable);
4099 #endif /* CCISS_DEBUG */
1da177e4 4100
49153998
MM		 4101 /* Some controllers support Zero Memory Raid (ZMR).
4102 * When configured in ZMR mode the number of supported
4103 * commands drops to 64. So instead of just setting an
4104 * arbitrary value we make the driver a little smarter.
4105 * We read the config table to tell us how many commands
4106 * are supported on the controller then subtract 4 to
4107 * leave a little room for ioctl calls.
4108 */
5e216153 4109 c->max_commands = readl(&(c->cfgtable->MaxPerformantModeCommands));
5c07a311
DB		 4110 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
4111
4112 /*
4113 * Limit native command to 32 s/g elements to save dma'able memory.
4114 * Howvever spec says if 0, use 31
4115 */
4116
4117 c->max_cmd_sgentries = 31;
4118 if (c->maxsgentries > 512) {
4119 c->max_cmd_sgentries = 32;
4120 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
4121 c->maxsgentries -= 1; /* account for chain pointer */
4122 } else {
4123 c->maxsgentries = 31; /* Default to traditional value */
4124 c->chainsize = 0; /* traditional */
4125 }
4126
2ec24ff1
SC		 4127 c->product_name = products[prod_index].product_name;
4128 c->access = *(products[prod_index].access);
4129 c->nr_cmds = c->max_commands - 4;
7c832835
BH		 4130 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
4131 (readb(&c->cfgtable->Signature[1]) != 'I') ||
4132 (readb(&c->cfgtable->Signature[2]) != 'S') ||
4133 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 4134 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 4135 err = -ENODEV;
4e570309 4136 goto err_out_free_res;
1da177e4 4137 }
1da177e4 4138#ifdef CONFIG_X86
7c832835
BH		 4139 {
4140 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
4141 __u32 prefetch;
4142 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
4143 prefetch |= 0x100;
4144 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
4145 }
1da177e4
LT		 4146#endif
4147
8bf50f71
MMOD		 4148 /* Disabling DMA prefetch and refetch for the P600.
4149 * An ASIC bug may result in accesses to invalid memory addresses.
4150 * We've disabled prefetch for some time now. Testing with XEN
4151 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 4152 */
4153 if(board_id == 0x3225103C) {
5e216153 4154 __u32 dma_prefetch;
8bf50f71 4155 __u32 dma_refetch;
f92e2f5f
MM		 4156 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
4157 dma_prefetch |= 0x8000;
4158 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 4159 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
4160 dma_refetch |= 0x1;
4161 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 4162 }
4163
1da177e4 4164#ifdef CCISS_DEBUG
5e216153 4165 printk(KERN_WARNING "Trying to put board into Performant mode\n");
7c832835 4166#endif /* CCISS_DEBUG */
b14aa6dc 4167 cciss_put_controller_into_performant_mode(c);
1da177e4
LT		 4168 return 0;
4169
5faad620 4170err_out_free_res:
872225ca
MM		 4171 /*
4172 * Deliberately omit pci_disable_device(): it does something nasty to
4173 * Smart Array controllers that pci_enable_device does not undo
4174 */
4e570309 4175 pci_release_regions(pdev);
c33ac89b 4176 return err;
1da177e4
LT		 4177}
4178
6ae5ce8e
MM		 4179/* Function to find the first free pointer into our hba[] array
4180 * Returns -1 if no free entries are left.
7c832835 4181 */
1da177e4
LT		 4182static int alloc_cciss_hba(void)
4183{
799202cb 4184 int i;
1da177e4 4185
7c832835 4186 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 4187 if (!hba[i]) {
4188 ctlr_info_t *p;
f2912a12 4189
06ff37ff 4190 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 4191 if (!p)
4192 goto Enomem;
1da177e4
LT		 4193 hba[i] = p;
4194 return i;
4195 }
4196 }
4197 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 4198 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 4199 return -1;
4200Enomem:
1da177e4 4201 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 4202 return -1;
4203}
4204
2c935593 4205static void free_hba(int n)
1da177e4 4206{
2c935593
SC		 4207 ctlr_info_t *h = hba[n];
4208 int i;
1da177e4 4209
2c935593
SC		 4210 hba[n] = NULL;
4211 for (i = 0; i < h->highest_lun + 1; i++)
4212 if (h->gendisk[i] != NULL)
4213 put_disk(h->gendisk[i]);
4214 kfree(h);
1da177e4
LT		 4215}
4216
82eb03cf
CC		 4217/* Send a message CDB to the firmware. */
4218static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
4219{
4220 typedef struct {
4221 CommandListHeader_struct CommandHeader;
4222 RequestBlock_struct Request;
4223 ErrDescriptor_struct ErrorDescriptor;
4224 } Command;
4225 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4226 Command *cmd;
4227 dma_addr_t paddr64;
4228 uint32_t paddr32, tag;
4229 void __iomem *vaddr;
4230 int i, err;
4231
4232 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4233 if (vaddr == NULL)
4234 return -ENOMEM;
4235
4236 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4237 CCISS commands, so they must be allocated from the lower 4GiB of
4238 memory. */
e930438c 4239 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 4240 if (err) {
4241 iounmap(vaddr);
4242 return -ENOMEM;
4243 }
4244
4245 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4246 if (cmd == NULL) {
4247 iounmap(vaddr);
4248 return -ENOMEM;
4249 }
4250
4251 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4252 although there's no guarantee, we assume that the address is at
4253 least 4-byte aligned (most likely, it's page-aligned). */
4254 paddr32 = paddr64;
4255
4256 cmd->CommandHeader.ReplyQueue = 0;
4257 cmd->CommandHeader.SGList = 0;
4258 cmd->CommandHeader.SGTotal = 0;
4259 cmd->CommandHeader.Tag.lower = paddr32;
4260 cmd->CommandHeader.Tag.upper = 0;
4261 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4262
4263 cmd->Request.CDBLen = 16;
4264 cmd->Request.Type.Type = TYPE_MSG;
4265 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4266 cmd->Request.Type.Direction = XFER_NONE;
4267 cmd->Request.Timeout = 0; /* Don't time out */
4268 cmd->Request.CDB[0] = opcode;
4269 cmd->Request.CDB[1] = type;
4270 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4271
4272 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4273 cmd->ErrorDescriptor.Addr.upper = 0;
4274 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4275
4276 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4277
4278 for (i = 0; i < 10; i++) {
4279 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4280 if ((tag & ~3) == paddr32)
4281 break;
4282 schedule_timeout_uninterruptible(HZ);
4283 }
4284
4285 iounmap(vaddr);
4286
4287 /* we leak the DMA buffer here ... no choice since the controller could
4288 still complete the command. */
4289 if (i == 10) {
4290 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4291 opcode, type);
4292 return -ETIMEDOUT;
4293 }
4294
4295 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4296
4297 if (tag & 2) {
4298 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4299 opcode, type);
4300 return -EIO;
4301 }
4302
4303 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4304 opcode, type);
4305 return 0;
4306}
4307
4308#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4309#define cciss_noop(p) cciss_message(p, 3, 0)
4310
4311static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4312{
4313/* the #defines are stolen from drivers/pci/msi.h. */
4314#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4315#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4316
4317 int pos;
4318 u16 control = 0;
4319
4320 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4321 if (pos) {
4322 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4323 if (control & PCI_MSI_FLAGS_ENABLE) {
4324 printk(KERN_INFO "cciss: resetting MSI\n");
4325 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4326 }
4327 }
4328
4329 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4330 if (pos) {
4331 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4332 if (control & PCI_MSIX_FLAGS_ENABLE) {
4333 printk(KERN_INFO "cciss: resetting MSI-X\n");
4334 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4335 }
4336 }
4337
4338 return 0;
4339}
4340
4341/* This does a hard reset of the controller using PCI power management
4342 * states. */
4343static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4344{
4345 u16 pmcsr, saved_config_space[32];
4346 int i, pos;
4347
4348 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4349
4350 /* This is very nearly the same thing as
4351
4352 pci_save_state(pci_dev);
4353 pci_set_power_state(pci_dev, PCI_D3hot);
4354 pci_set_power_state(pci_dev, PCI_D0);
4355 pci_restore_state(pci_dev);
4356
4357 but we can't use these nice canned kernel routines on
4358 kexec, because they also check the MSI/MSI-X state in PCI
4359 configuration space and do the wrong thing when it is
4360 set/cleared. Also, the pci_save/restore_state functions
4361 violate the ordering requirements for restoring the
4362 configuration space from the CCISS document (see the
4363 comment below). So we roll our own .... */
4364
4365 for (i = 0; i < 32; i++)
4366 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4367
4368 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4369 if (pos == 0) {
4370 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4371 return -ENODEV;
4372 }
4373
4374 /* Quoting from the Open CISS Specification: "The Power
4375 * Management Control/Status Register (CSR) controls the power
4376 * state of the device. The normal operating state is D0,
4377 * CSR=00h. The software off state is D3, CSR=03h. To reset
4378 * the controller, place the interface device in D3 then to
4379 * D0, this causes a secondary PCI reset which will reset the
4380 * controller." */
4381
4382 /* enter the D3hot power management state */
4383 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4384 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4385 pmcsr |= PCI_D3hot;
4386 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4387
4388 schedule_timeout_uninterruptible(HZ >> 1);
4389
4390 /* enter the D0 power management state */
4391 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4392 pmcsr |= PCI_D0;
4393 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4394
4395 schedule_timeout_uninterruptible(HZ >> 1);
4396
4397 /* Restore the PCI configuration space. The Open CISS
4398 * Specification says, "Restore the PCI Configuration
4399 * Registers, offsets 00h through 60h. It is important to
4400 * restore the command register, 16-bits at offset 04h,
4401 * last. Do not restore the configuration status register,
4402 * 16-bits at offset 06h." Note that the offset is 2*i. */
4403 for (i = 0; i < 32; i++) {
4404 if (i == 2 || i == 3)
4405 continue;
4406 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4407 }
4408 wmb();
4409 pci_write_config_word(pdev, 4, saved_config_space[2]);
4410
4411 return 0;
4412}
4413
1da177e4
LT		 4414/*
4415 * This is it. Find all the controllers and register them. I really hate
4416 * stealing all these major device numbers.
4417 * returns the number of block devices registered.
4418 */
4419static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4420 const struct pci_device_id *ent)
1da177e4 4421{
1da177e4 4422 int i;
799202cb 4423 int j = 0;
5c07a311 4424 int k = 0;
1da177e4 4425 int rc;
22bece00 4426 int dac, return_code;
212a5026 4427 InquiryData_struct *inq_buff;
1da177e4 4428
82eb03cf
CC		 4429 if (reset_devices) {
4430 /* Reset the controller with a PCI power-cycle */
4431 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4432 return -ENODEV;
4433
5e18cfd0
JA		 4434 /* Now try to get the controller to respond to a no-op. Some
4435 devices (notably the HP Smart Array 5i Controller) need
4436 up to 30 seconds to respond. */
5e4c91c8 4437 for (i=0; i<30; i++) {
82eb03cf
CC		 4438 if (cciss_noop(pdev) == 0)
4439 break;
5e4c91c8
JA		 4440
4441 schedule_timeout_uninterruptible(HZ);
4442 }
4443 if (i == 30) {
4444 printk(KERN_ERR "cciss: controller seems dead\n");
4445 return -EBUSY;
82eb03cf
CC		 4446 }
4447 }
4448
1da177e4 4449 i = alloc_cciss_hba();
7c832835 4450 if (i < 0)
e2019b58 4451 return -1;
1f8ef380 4452 hba[i]->busy_initializing = 1;
8a3173de
JA		 4453 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4454 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4455 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4456
1da177e4 4457 if (cciss_pci_init(hba[i], pdev) != 0)
2cfa948c 4458 goto clean_no_release_regions;
1da177e4
LT		 4459
4460 sprintf(hba[i]->devname, "cciss%d", i);
4461 hba[i]->ctlr = i;
4462 hba[i]->pdev = pdev;
4463
b368c9dd
AP		 4464 init_completion(&hba[i]->scan_wait);
4465
7fe06326
AP		 4466 if (cciss_create_hba_sysfs_entry(hba[i]))
4467 goto clean0;
4468
1da177e4 4469 /* configure PCI DMA stuff */
6a35528a 4470 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4471 dac = 1;
284901a9 4472 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4473 dac = 0;
1da177e4 4474 else {
40aabb58 4475 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4476 goto clean1;
4477 }
4478
4479 /*
4480 * register with the major number, or get a dynamic major number
4481 * by passing 0 as argument. This is done for greater than
4482 * 8 controller support.
4483 */
4484 if (i < MAX_CTLR_ORIG)
564de74a 4485 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4486 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4487 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4488 printk(KERN_ERR
7c832835
BH		 4489 "cciss: Unable to get major number %d for %s "
4490 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4491 goto clean1;
7c832835 4492 } else {
1da177e4
LT		 4493 if (i >= MAX_CTLR_ORIG)
4494 hba[i]->major = rc;
4495 }
4496
4497 /* make sure the board interrupts are off */
4498 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
0c2b3908 4499 if (hba[i]->msi_vector || hba[i]->msix_vector) {
256aea3f 4500 if (request_irq(hba[i]->intr[PERF_MODE_INT],
0c2b3908
MM		 4501 do_cciss_msix_intr,
4502 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4503 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
256aea3f 4504 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
0c2b3908
MM		 4505 goto clean2;
4506 }
4507 } else {
256aea3f 4508 if (request_irq(hba[i]->intr[PERF_MODE_INT], do_cciss_intx,
0c2b3908
MM		 4509 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4510 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
256aea3f 4511 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
0c2b3908
MM		 4512 goto clean2;
4513 }
1da177e4 4514 }
40aabb58
BH		 4515
4516 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835 4517 hba[i]->devname, pdev->device, pci_name(pdev),
5e216153 4518 hba[i]->intr[PERF_MODE_INT], dac ? "" : " not");
7c832835
BH		 4519
4520 hba[i]->cmd_pool_bits =
061837bc
JL		 4521 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4522 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4523 hba[i]->cmd_pool = (CommandList_struct *)
4524 pci_alloc_consistent(hba[i]->pdev,
f880632f 4525 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4526 &(hba[i]->cmd_pool_dhandle));
4527 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4528 pci_alloc_consistent(hba[i]->pdev,
f880632f 4529 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4530 &(hba[i]->errinfo_pool_dhandle));
4531 if ((hba[i]->cmd_pool_bits == NULL)
4532 || (hba[i]->cmd_pool == NULL)
4533 || (hba[i]->errinfo_pool == NULL)) {
4534 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4535 goto clean4;
4536 }
5c07a311
DB		 4537
4538 /* Need space for temp scatter list */
4539 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4540 sizeof(struct scatterlist *),
4541 GFP_KERNEL);
4542 for (k = 0; k < hba[i]->nr_cmds; k++) {
4543 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4544 hba[i]->maxsgentries,
4545 GFP_KERNEL);
4546 if (hba[i]->scatter_list[k] == NULL) {
4547 printk(KERN_ERR "cciss%d: could not allocate "
4548 "s/g lists\n", i);
4549 goto clean4;
4550 }
4551 }
49fc5601
SC		 4552 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
4553 hba[i]->chainsize, hba[i]->nr_cmds);
4554 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
5c07a311 4555 goto clean4;
5c07a311 4556
1da177e4 4557 spin_lock_init(&hba[i]->lock);
1da177e4 4558
7c832835
BH		 4559 /* Initialize the pdev driver private data.
4560 have it point to hba[i]. */
1da177e4 4561 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4562 /* command and error info recs zeroed out before
4563 they are used */
4564 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4565 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4566 * sizeof(unsigned long));
1da177e4 4567
6ae5ce8e
MM		 4568 hba[i]->num_luns = 0;
4569 hba[i]->highest_lun = -1;
4570 for (j = 0; j < CISS_MAX_LUN; j++) {
9cef0d2f 4571 hba[i]->drv[j] = NULL;
6ae5ce8e
MM		 4572 hba[i]->gendisk[j] = NULL;
4573 }
1da177e4
LT		 4574
4575 cciss_scsi_setup(i);
4576
4577 /* Turn the interrupts on so we can service requests */
4578 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4579
22bece00
MM		 4580 /* Get the firmware version */
4581 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4582 if (inq_buff == NULL) {
4583 printk(KERN_ERR "cciss: out of memory\n");
4584 goto clean4;
4585 }
4586
4587 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4588 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4589 if (return_code == IO_OK) {
4590 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4591 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4592 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4593 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4594 } else { /* send command failed */
4595 printk(KERN_WARNING "cciss: unable to determine firmware"
4596 " version of controller\n");
4597 }
212a5026 4598 kfree(inq_buff);
22bece00 4599
1da177e4 4600 cciss_procinit(i);
92c4231a 4601
5c07a311 4602 hba[i]->cciss_max_sectors = 8192;
92c4231a 4603
2d11d993 4604 rebuild_lun_table(hba[i], 1, 0);
d6dbf42e 4605 hba[i]->busy_initializing = 0;
e2019b58 4606 return 1;
1da177e4 4607
6ae5ce8e 4608clean4:
6044ec88 4609 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4610 /* Free up sg elements */
4611 for (k = 0; k < hba[i]->nr_cmds; k++)
4612 kfree(hba[i]->scatter_list[k]);
4613 kfree(hba[i]->scatter_list);
49fc5601 4614 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
7c832835 4615 if (hba[i]->cmd_pool)
1da177e4 4616 pci_free_consistent(hba[i]->pdev,
f880632f 4617 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4618 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4619 if (hba[i]->errinfo_pool)
1da177e4 4620 pci_free_consistent(hba[i]->pdev,
f880632f 4621 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4622 hba[i]->errinfo_pool,
4623 hba[i]->errinfo_pool_dhandle);
5e216153 4624 free_irq(hba[i]->intr[PERF_MODE_INT], hba[i]);
6ae5ce8e 4625clean2:
1da177e4 4626 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4627clean1:
7fe06326
AP		 4628 cciss_destroy_hba_sysfs_entry(hba[i]);
4629clean0:
2cfa948c
SC		 4630 pci_release_regions(pdev);
4631clean_no_release_regions:
1f8ef380 4632 hba[i]->busy_initializing = 0;
9cef0d2f 4633
872225ca
MM		 4634 /*
4635 * Deliberately omit pci_disable_device(): it does something nasty to
4636 * Smart Array controllers that pci_enable_device does not undo
4637 */
799202cb 4638 pci_set_drvdata(pdev, NULL);
61808c2b 4639 free_hba(i);
e2019b58 4640 return -1;
1da177e4
LT		 4641}
4642
e9ca75b5 4643static void cciss_shutdown(struct pci_dev *pdev)
1da177e4 4644{
29009a03
SC		 4645 ctlr_info_t *h;
4646 char *flush_buf;
7c832835 4647 int return_code;
1da177e4 4648
29009a03
SC		 4649 h = pci_get_drvdata(pdev);
4650 flush_buf = kzalloc(4, GFP_KERNEL);
4651 if (!flush_buf) {
4652 printk(KERN_WARNING
4653 "cciss:%d cache not flushed, out of memory.\n",
4654 h->ctlr);
e9ca75b5 4655 return;
e9ca75b5 4656 }
29009a03
SC		 4657 /* write all data in the battery backed cache to disk */
4658 memset(flush_buf, 0, 4);
4659 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4660 4, 0, CTLR_LUNID, TYPE_CMD);
4661 kfree(flush_buf);
4662 if (return_code != IO_OK)
4663 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4664 h->ctlr);
4665 h->access.set_intr_mask(h, CCISS_INTR_OFF);
5e216153 4666 free_irq(h->intr[PERF_MODE_INT], h);
e9ca75b5
GB		 4667}
4668
4669static void __devexit cciss_remove_one(struct pci_dev *pdev)
4670{
4671 ctlr_info_t *tmp_ptr;
4672 int i, j;
4673
7c832835
BH		 4674 if (pci_get_drvdata(pdev) == NULL) {
4675 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4676 return;
4677 }
0a9279cc 4678
1da177e4
LT		 4679 tmp_ptr = pci_get_drvdata(pdev);
4680 i = tmp_ptr->ctlr;
7c832835 4681 if (hba[i] == NULL) {
1da177e4 4682 printk(KERN_ERR "cciss: device appears to "
7c832835 4683 "already be removed \n");
1da177e4
LT		 4684 return;
4685 }
b6550777 4686
b368c9dd 4687 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4688
b368c9dd 4689 remove_from_scan_list(hba[i]);
b6550777
BH		 4690 remove_proc_entry(hba[i]->devname, proc_cciss);
4691 unregister_blkdev(hba[i]->major, hba[i]->devname);
4692
4693 /* remove it from the disk list */
4694 for (j = 0; j < CISS_MAX_LUN; j++) {
4695 struct gendisk *disk = hba[i]->gendisk[j];
4696 if (disk) {
165125e1 4697 struct request_queue *q = disk->queue;
b6550777 4698
097d0264 4699 if (disk->flags & GENHD_FL_UP) {
8ce51966 4700 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4701 del_gendisk(disk);
097d0264 4702 }
b6550777
BH		 4703 if (q)
4704 blk_cleanup_queue(q);
4705 }
4706 }
4707
ba198efb 4708#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4709 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4710#endif
b6550777 4711
e9ca75b5 4712 cciss_shutdown(pdev);
fb86a35b
MM		 4713
4714#ifdef CONFIG_PCI_MSI
7c832835
BH		 4715 if (hba[i]->msix_vector)
4716 pci_disable_msix(hba[i]->pdev);
4717 else if (hba[i]->msi_vector)
4718 pci_disable_msi(hba[i]->pdev);
4719#endif /* CONFIG_PCI_MSI */
fb86a35b 4720
1da177e4 4721 iounmap(hba[i]->vaddr);
1da177e4 4722
f880632f 4723 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4724 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4725 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4726 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4727 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4728 /* Free up sg elements */
4729 for (j = 0; j < hba[i]->nr_cmds; j++)
4730 kfree(hba[i]->scatter_list[j]);
4731 kfree(hba[i]->scatter_list);
49fc5601 4732 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
872225ca
MM		 4733 /*
4734 * Deliberately omit pci_disable_device(): it does something nasty to
4735 * Smart Array controllers that pci_enable_device does not undo
4736 */
7c832835 4737 pci_release_regions(pdev);
4e570309 4738 pci_set_drvdata(pdev, NULL);
7fe06326 4739 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4740 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4741 free_hba(i);
7c832835 4742}
1da177e4
LT		 4743
4744static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4745 .name = "cciss",
4746 .probe = cciss_init_one,
4747 .remove = __devexit_p(cciss_remove_one),
4748 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4749 .shutdown = cciss_shutdown,
1da177e4
LT		 4750};
4751
4752/*
4753 * This is it. Register the PCI driver information for the cards we control
7c832835 4754 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4755 */
4756static int __init cciss_init(void)
4757{
7fe06326
AP		 4758 int err;
4759
10cbda97
JA		 4760 /*
4761 * The hardware requires that commands are aligned on a 64-bit
4762 * boundary. Given that we use pci_alloc_consistent() to allocate an
4763 * array of them, the size must be a multiple of 8 bytes.
4764 */
1b7d0d28 4765 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
1da177e4
LT		 4766 printk(KERN_INFO DRIVER_NAME "\n");
4767
7fe06326
AP		 4768 err = bus_register(&cciss_bus_type);
4769 if (err)
4770 return err;
4771
b368c9dd
AP		 4772 /* Start the scan thread */
4773 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4774 if (IS_ERR(cciss_scan_thread)) {
4775 err = PTR_ERR(cciss_scan_thread);
4776 goto err_bus_unregister;
4777 }
4778
1da177e4 4779 /* Register for our PCI devices */
7fe06326
AP		 4780 err = pci_register_driver(&cciss_pci_driver);
4781 if (err)
b368c9dd 4782 goto err_thread_stop;
7fe06326 4783
617e1344 4784 return err;
7fe06326 4785
b368c9dd
AP		 4786err_thread_stop:
4787 kthread_stop(cciss_scan_thread);
4788err_bus_unregister:
7fe06326 4789 bus_unregister(&cciss_bus_type);
b368c9dd 4790
7fe06326 4791 return err;
1da177e4
LT		 4792}
4793
4794static void __exit cciss_cleanup(void)
4795{
4796 int i;
4797
4798 pci_unregister_driver(&cciss_pci_driver);
4799 /* double check that all controller entrys have been removed */
7c832835
BH		 4800 for (i = 0; i < MAX_CTLR; i++) {
4801 if (hba[i] != NULL) {
1da177e4 4802 printk(KERN_WARNING "cciss: had to remove"
7c832835 4803 " controller %d\n", i);
1da177e4
LT		 4804 cciss_remove_one(hba[i]->pdev);
4805 }
4806 }
b368c9dd 4807 kthread_stop(cciss_scan_thread);
928b4d8c 4808 remove_proc_entry("driver/cciss", NULL);
7fe06326 4809 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4810}
4811
4812module_init(cciss_init);
4813module_exit(cciss_cleanup);
Linux kernel - Deliverables
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