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