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cciss: fix hard reset code.
[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 180static int cciss_open(struct block_device *bdev, fmode_t mode);
6e9624b8 181static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode);
ef7822c2 182static int cciss_release(struct gendisk *disk, fmode_t mode);
8a6cfeb6
AB		 183static int do_ioctl(struct block_device *bdev, fmode_t mode,
184 unsigned int cmd, unsigned long arg);
ef7822c2 185static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 186 unsigned int cmd, unsigned long arg);
a885c8c4 187static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 188
1da177e4 189static int cciss_revalidate(struct gendisk *disk);
2d11d993 190static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 191static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 192 int clear_all, int via_ioctl);
1da177e4 193
7b838bde 194static void cciss_read_capacity(int ctlr, int logvol,
00988a35 195 sector_t *total_size, unsigned int *block_size);
7b838bde 196static void cciss_read_capacity_16(int ctlr, int logvol,
00988a35
MMOD		 197 sector_t *total_size, unsigned int *block_size);
198static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 199 sector_t total_size,
00988a35 200 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 201 drive_info_struct *drv);
dac5488a 202static void __devinit cciss_interrupt_mode(ctlr_info_t *);
7c832835 203static void start_io(ctlr_info_t *h);
7c832835 204static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 205 __u8 page_code, unsigned char scsi3addr[],
206 int cmd_type);
85cc61ae 207static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
208 int attempt_retry);
209static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 210
d6f4965d 211static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 212static int scan_thread(void *data);
213static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 214static void cciss_hba_release(struct device *dev);
215static void cciss_device_release(struct device *dev);
361e9b07 216static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
9cef0d2f 217static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
29979a71 218static inline u32 next_command(ctlr_info_t *h);
a6528d01
SC		 219static int __devinit cciss_find_cfg_addrs(struct pci_dev *pdev,
220 void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
221 u64 *cfg_offset);
222static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
223 unsigned long *memory_bar);
224
33079b21 225
5e216153
MM		 226/* performant mode helper functions */
227static void calc_bucket_map(int *bucket, int num_buckets, int nsgs,
228 int *bucket_map);
229static void cciss_put_controller_into_performant_mode(ctlr_info_t *h);
230
1da177e4 231#ifdef CONFIG_PROC_FS
1da177e4
LT		 232static void cciss_procinit(int i);
233#else
7c832835
BH		 234static void cciss_procinit(int i)
235{
236}
237#endif /* CONFIG_PROC_FS */
1da177e4
LT		 238
239#ifdef CONFIG_COMPAT
ef7822c2
AV		 240static int cciss_compat_ioctl(struct block_device *, fmode_t,
241 unsigned, unsigned long);
1da177e4
LT		 242#endif
243
83d5cde4 244static const struct block_device_operations cciss_fops = {
7c832835 245 .owner = THIS_MODULE,
6e9624b8 246 .open = cciss_unlocked_open,
ef7822c2 247 .release = cciss_release,
8a6cfeb6 248 .ioctl = do_ioctl,
7c832835 249 .getgeo = cciss_getgeo,
1da177e4 250#ifdef CONFIG_COMPAT
ef7822c2 251 .compat_ioctl = cciss_compat_ioctl,
1da177e4 252#endif
7c832835 253 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 254};
255
5e216153
MM		 256/* set_performant_mode: Modify the tag for cciss performant
257 * set bit 0 for pull model, bits 3-1 for block fetch
258 * register number
259 */
260static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
261{
262 if (likely(h->transMethod == CFGTBL_Trans_Performant))
263 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
264}
265
1da177e4
LT		 266/*
267 * Enqueuing and dequeuing functions for cmdlists.
268 */
8a3173de 269static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 270{
8a3173de 271 hlist_add_head(&c->list, list);
1da177e4
LT		 272}
273
8a3173de 274static inline void removeQ(CommandList_struct *c)
1da177e4 275{
b59e64d0
HR		 276 /*
277 * After kexec/dump some commands might still
278 * be in flight, which the firmware will try
279 * to complete. Resetting the firmware doesn't work
280 * with old fw revisions, so we have to mark
281 * them off as 'stale' to prevent the driver from
282 * falling over.
283 */
284 if (WARN_ON(hlist_unhashed(&c->list))) {
285 c->cmd_type = CMD_MSG_STALE;
8a3173de 286 return;
b59e64d0 287 }
8a3173de
JA		 288
289 hlist_del_init(&c->list);
1da177e4
LT		 290}
291
664a717d
MM		 292static void enqueue_cmd_and_start_io(ctlr_info_t *h,
293 CommandList_struct *c)
294{
295 unsigned long flags;
5e216153 296 set_performant_mode(h, c);
664a717d
MM		 297 spin_lock_irqsave(&h->lock, flags);
298 addQ(&h->reqQ, c);
299 h->Qdepth++;
300 start_io(h);
301 spin_unlock_irqrestore(&h->lock, flags);
302}
303
dccc9b56 304static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
49fc5601
SC		 305 int nr_cmds)
306{
307 int i;
308
309 if (!cmd_sg_list)
310 return;
311 for (i = 0; i < nr_cmds; i++) {
dccc9b56
SC		 312 kfree(cmd_sg_list[i]);
313 cmd_sg_list[i] = NULL;
49fc5601
SC		 314 }
315 kfree(cmd_sg_list);
316}
317
dccc9b56
SC		 318static SGDescriptor_struct **cciss_allocate_sg_chain_blocks(
319 ctlr_info_t *h, int chainsize, int nr_cmds)
49fc5601
SC		 320{
321 int j;
dccc9b56 322 SGDescriptor_struct **cmd_sg_list;
49fc5601
SC		 323
324 if (chainsize <= 0)
325 return NULL;
326
327 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
328 if (!cmd_sg_list)
329 return NULL;
330
331 /* Build up chain blocks for each command */
332 for (j = 0; j < nr_cmds; j++) {
49fc5601 333 /* Need a block of chainsized s/g elements. */
dccc9b56
SC		 334 cmd_sg_list[j] = kmalloc((chainsize *
335 sizeof(*cmd_sg_list[j])), GFP_KERNEL);
336 if (!cmd_sg_list[j]) {
49fc5601
SC		 337 dev_err(&h->pdev->dev, "Cannot get memory "
338 "for s/g chains.\n");
339 goto clean;
340 }
341 }
342 return cmd_sg_list;
343clean:
344 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
345 return NULL;
346}
347
d45033ef
SC		 348static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c)
349{
350 SGDescriptor_struct *chain_sg;
351 u64bit temp64;
352
353 if (c->Header.SGTotal <= h->max_cmd_sgentries)
354 return;
355
356 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
357 temp64.val32.lower = chain_sg->Addr.lower;
358 temp64.val32.upper = chain_sg->Addr.upper;
359 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
360}
361
362static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c,
363 SGDescriptor_struct *chain_block, int len)
364{
365 SGDescriptor_struct *chain_sg;
366 u64bit temp64;
367
368 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
369 chain_sg->Ext = CCISS_SG_CHAIN;
370 chain_sg->Len = len;
371 temp64.val = pci_map_single(h->pdev, chain_block, len,
372 PCI_DMA_TODEVICE);
373 chain_sg->Addr.lower = temp64.val32.lower;
374 chain_sg->Addr.upper = temp64.val32.upper;
375}
376
1da177e4
LT		 377#include "cciss_scsi.c" /* For SCSI tape support */
378
1e6f2dc1
AB		 379static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
380 "UNKNOWN"
381};
382#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
0f5486ec 383
1da177e4
LT		 384#ifdef CONFIG_PROC_FS
385
386/*
387 * Report information about this controller.
388 */
389#define ENG_GIG 1000000000
390#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 391#define ENGAGE_SCSI "engage scsi"
1da177e4
LT		 392
393static struct proc_dir_entry *proc_cciss;
394
89b6e743 395static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 396{
89b6e743
MM		 397 ctlr_info_t *h = seq->private;
398
399 seq_printf(seq, "%s: HP %s Controller\n"
400 "Board ID: 0x%08lx\n"
401 "Firmware Version: %c%c%c%c\n"
402 "IRQ: %d\n"
403 "Logical drives: %d\n"
404 "Current Q depth: %d\n"
405 "Current # commands on controller: %d\n"
406 "Max Q depth since init: %d\n"
407 "Max # commands on controller since init: %d\n"
408 "Max SG entries since init: %d\n",
409 h->devname,
410 h->product_name,
411 (unsigned long)h->board_id,
412 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
5e216153 413 h->firm_ver[3], (unsigned int)h->intr[PERF_MODE_INT],
89b6e743
MM		 414 h->num_luns,
415 h->Qdepth, h->commands_outstanding,
416 h->maxQsinceinit, h->max_outstanding, h->maxSG);
417
418#ifdef CONFIG_CISS_SCSI_TAPE
419 cciss_seq_tape_report(seq, h->ctlr);
420#endif /* CONFIG_CISS_SCSI_TAPE */
421}
1da177e4 422
89b6e743
MM		 423static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
424{
425 ctlr_info_t *h = seq->private;
426 unsigned ctlr = h->ctlr;
427 unsigned long flags;
1da177e4
LT		 428
429 /* prevent displaying bogus info during configuration
430 * or deconfiguration of a logical volume
431 */
432 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
433 if (h->busy_configuring) {
434 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 435 return ERR_PTR(-EBUSY);
1da177e4
LT		 436 }
437 h->busy_configuring = 1;
438 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
439
89b6e743
MM		 440 if (*pos == 0)
441 cciss_seq_show_header(seq);
442
443 return pos;
444}
445
446static int cciss_seq_show(struct seq_file *seq, void *v)
447{
448 sector_t vol_sz, vol_sz_frac;
449 ctlr_info_t *h = seq->private;
450 unsigned ctlr = h->ctlr;
451 loff_t *pos = v;
9cef0d2f 452 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 453
454 if (*pos > h->highest_lun)
455 return 0;
456
531c2dc7
SC		 457 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
458 return 0;
459
89b6e743
MM		 460 if (drv->heads == 0)
461 return 0;
462
463 vol_sz = drv->nr_blocks;
464 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
465 vol_sz_frac *= 100;
466 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
467
fa52bec9 468 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 469 drv->raid_level = RAID_UNKNOWN;
470 seq_printf(seq, "cciss/c%dd%d:"
471 "\t%4u.%02uGB\tRAID %s\n",
472 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
473 raid_label[drv->raid_level]);
474 return 0;
475}
476
477static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
478{
479 ctlr_info_t *h = seq->private;
480
481 if (*pos > h->highest_lun)
482 return NULL;
483 *pos += 1;
484
485 return pos;
486}
487
488static void cciss_seq_stop(struct seq_file *seq, void *v)
489{
490 ctlr_info_t *h = seq->private;
491
492 /* Only reset h->busy_configuring if we succeeded in setting
493 * it during cciss_seq_start. */
494 if (v == ERR_PTR(-EBUSY))
495 return;
7c832835 496
1da177e4 497 h->busy_configuring = 0;
1da177e4
LT		 498}
499
88e9d34c 500static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 501 .start = cciss_seq_start,
502 .show = cciss_seq_show,
503 .next = cciss_seq_next,
504 .stop = cciss_seq_stop,
505};
506
507static int cciss_seq_open(struct inode *inode, struct file *file)
508{
509 int ret = seq_open(file, &cciss_seq_ops);
510 struct seq_file *seq = file->private_data;
511
512 if (!ret)
513 seq->private = PDE(inode)->data;
514
515 return ret;
516}
517
518static ssize_t
519cciss_proc_write(struct file *file, const char __user *buf,
520 size_t length, loff_t *ppos)
1da177e4 521{
89b6e743
MM		 522 int err;
523 char *buffer;
524
525#ifndef CONFIG_CISS_SCSI_TAPE
526 return -EINVAL;
1da177e4
LT		 527#endif
528
89b6e743 529 if (!buf || length > PAGE_SIZE - 1)
7c832835 530 return -EINVAL;
89b6e743
MM		 531
532 buffer = (char *)__get_free_page(GFP_KERNEL);
533 if (!buffer)
534 return -ENOMEM;
535
536 err = -EFAULT;
537 if (copy_from_user(buffer, buf, length))
538 goto out;
539 buffer[length] = '\0';
540
541#ifdef CONFIG_CISS_SCSI_TAPE
542 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
543 struct seq_file *seq = file->private_data;
544 ctlr_info_t *h = seq->private;
89b6e743 545
8721c81f
SC		 546 err = cciss_engage_scsi(h->ctlr);
547 if (err == 0)
89b6e743
MM		 548 err = length;
549 } else
550#endif /* CONFIG_CISS_SCSI_TAPE */
551 err = -EINVAL;
7c832835
BH		 552 /* might be nice to have "disengage" too, but it's not
553 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 554
555out:
556 free_page((unsigned long)buffer);
557 return err;
1da177e4
LT		 558}
559
828c0950 560static const struct file_operations cciss_proc_fops = {
89b6e743
MM		 561 .owner = THIS_MODULE,
562 .open = cciss_seq_open,
563 .read = seq_read,
564 .llseek = seq_lseek,
565 .release = seq_release,
566 .write = cciss_proc_write,
567};
568
1da177e4
LT		 569static void __devinit cciss_procinit(int i)
570{
571 struct proc_dir_entry *pde;
572
89b6e743 573 if (proc_cciss == NULL)
928b4d8c 574 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 575 if (!proc_cciss)
576 return;
3dfcf9c4 577 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 578 S_IROTH, proc_cciss,
3dfcf9c4 579 &cciss_proc_fops, hba[i]);
1da177e4 580}
7c832835 581#endif /* CONFIG_PROC_FS */
1da177e4 582
7fe06326
AP		 583#define MAX_PRODUCT_NAME_LEN 19
584
585#define to_hba(n) container_of(n, struct ctlr_info, dev)
586#define to_drv(n) container_of(n, drive_info_struct, dev)
587
d6f4965d
AP		 588static ssize_t host_store_rescan(struct device *dev,
589 struct device_attribute *attr,
590 const char *buf, size_t count)
591{
592 struct ctlr_info *h = to_hba(dev);
593
594 add_to_scan_list(h);
595 wake_up_process(cciss_scan_thread);
596 wait_for_completion_interruptible(&h->scan_wait);
597
598 return count;
599}
8ba95c69 600static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 601
602static ssize_t dev_show_unique_id(struct device *dev,
603 struct device_attribute *attr,
604 char *buf)
605{
606 drive_info_struct *drv = to_drv(dev);
607 struct ctlr_info *h = to_hba(drv->dev.parent);
608 __u8 sn[16];
609 unsigned long flags;
610 int ret = 0;
611
612 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
613 if (h->busy_configuring)
614 ret = -EBUSY;
615 else
616 memcpy(sn, drv->serial_no, sizeof(sn));
617 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
618
619 if (ret)
620 return ret;
621 else
622 return snprintf(buf, 16 * 2 + 2,
623 "%02X%02X%02X%02X%02X%02X%02X%02X"
624 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
625 sn[0], sn[1], sn[2], sn[3],
626 sn[4], sn[5], sn[6], sn[7],
627 sn[8], sn[9], sn[10], sn[11],
628 sn[12], sn[13], sn[14], sn[15]);
629}
8ba95c69 630static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP		 631
632static ssize_t dev_show_vendor(struct device *dev,
633 struct device_attribute *attr,
634 char *buf)
635{
636 drive_info_struct *drv = to_drv(dev);
637 struct ctlr_info *h = to_hba(drv->dev.parent);
638 char vendor[VENDOR_LEN + 1];
639 unsigned long flags;
640 int ret = 0;
641
642 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
643 if (h->busy_configuring)
644 ret = -EBUSY;
645 else
646 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
647 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
648
649 if (ret)
650 return ret;
651 else
652 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
653}
8ba95c69 654static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP		 655
656static ssize_t dev_show_model(struct device *dev,
657 struct device_attribute *attr,
658 char *buf)
659{
660 drive_info_struct *drv = to_drv(dev);
661 struct ctlr_info *h = to_hba(drv->dev.parent);
662 char model[MODEL_LEN + 1];
663 unsigned long flags;
664 int ret = 0;
665
666 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
667 if (h->busy_configuring)
668 ret = -EBUSY;
669 else
670 memcpy(model, drv->model, MODEL_LEN + 1);
671 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
672
673 if (ret)
674 return ret;
675 else
676 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
677}
8ba95c69 678static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP		 679
680static ssize_t dev_show_rev(struct device *dev,
681 struct device_attribute *attr,
682 char *buf)
683{
684 drive_info_struct *drv = to_drv(dev);
685 struct ctlr_info *h = to_hba(drv->dev.parent);
686 char rev[REV_LEN + 1];
687 unsigned long flags;
688 int ret = 0;
689
690 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
691 if (h->busy_configuring)
692 ret = -EBUSY;
693 else
694 memcpy(rev, drv->rev, REV_LEN + 1);
695 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
696
697 if (ret)
698 return ret;
699 else
700 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
701}
8ba95c69 702static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 703
ce84a8ae
SC		 704static ssize_t cciss_show_lunid(struct device *dev,
705 struct device_attribute *attr, char *buf)
706{
9cef0d2f
SC		 707 drive_info_struct *drv = to_drv(dev);
708 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 709 unsigned long flags;
710 unsigned char lunid[8];
711
712 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
713 if (h->busy_configuring) {
714 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
715 return -EBUSY;
716 }
717 if (!drv->heads) {
718 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
719 return -ENOTTY;
720 }
721 memcpy(lunid, drv->LunID, sizeof(lunid));
722 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
723 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
724 lunid[0], lunid[1], lunid[2], lunid[3],
725 lunid[4], lunid[5], lunid[6], lunid[7]);
726}
8ba95c69 727static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 728
3ff1111d
SC		 729static ssize_t cciss_show_raid_level(struct device *dev,
730 struct device_attribute *attr, char *buf)
731{
9cef0d2f
SC		 732 drive_info_struct *drv = to_drv(dev);
733 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 734 int raid;
735 unsigned long flags;
736
737 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
738 if (h->busy_configuring) {
739 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
740 return -EBUSY;
741 }
742 raid = drv->raid_level;
743 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
744 if (raid < 0 || raid > RAID_UNKNOWN)
745 raid = RAID_UNKNOWN;
746
747 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
748 raid_label[raid]);
749}
8ba95c69 750static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 751
e272afec
SC		 752static ssize_t cciss_show_usage_count(struct device *dev,
753 struct device_attribute *attr, char *buf)
754{
9cef0d2f
SC		 755 drive_info_struct *drv = to_drv(dev);
756 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 757 unsigned long flags;
758 int count;
759
760 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
761 if (h->busy_configuring) {
762 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
763 return -EBUSY;
764 }
765 count = drv->usage_count;
766 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
767 return snprintf(buf, 20, "%d\n", count);
768}
8ba95c69 769static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 770
d6f4965d
AP		 771static struct attribute *cciss_host_attrs[] = {
772 &dev_attr_rescan.attr,
773 NULL
774};
775
776static struct attribute_group cciss_host_attr_group = {
777 .attrs = cciss_host_attrs,
778};
779
9f792d9f 780static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP		 781 &cciss_host_attr_group,
782 NULL
783};
784
785static struct device_type cciss_host_type = {
786 .name = "cciss_host",
787 .groups = cciss_host_attr_groups,
617e1344 788 .release = cciss_hba_release,
d6f4965d
AP		 789};
790
7fe06326
AP		 791static struct attribute *cciss_dev_attrs[] = {
792 &dev_attr_unique_id.attr,
793 &dev_attr_model.attr,
794 &dev_attr_vendor.attr,
795 &dev_attr_rev.attr,
ce84a8ae 796 &dev_attr_lunid.attr,
3ff1111d 797 &dev_attr_raid_level.attr,
e272afec 798 &dev_attr_usage_count.attr,
7fe06326
AP		 799 NULL
800};
801
802static struct attribute_group cciss_dev_attr_group = {
803 .attrs = cciss_dev_attrs,
804};
805
a4dbd674 806static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 807 &cciss_dev_attr_group,
808 NULL
809};
810
811static struct device_type cciss_dev_type = {
812 .name = "cciss_device",
813 .groups = cciss_dev_attr_groups,
617e1344 814 .release = cciss_device_release,
7fe06326
AP		 815};
816
817static struct bus_type cciss_bus_type = {
818 .name = "cciss",
819};
820
617e1344
SC		 821/*
822 * cciss_hba_release is called when the reference count
823 * of h->dev goes to zero.
824 */
825static void cciss_hba_release(struct device *dev)
826{
827 /*
828 * nothing to do, but need this to avoid a warning
829 * about not having a release handler from lib/kref.c.
830 */
831}
7fe06326
AP		 832
833/*
834 * Initialize sysfs entry for each controller. This sets up and registers
835 * the 'cciss#' directory for each individual controller under
836 * /sys/bus/pci/devices/<dev>/.
837 */
838static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
839{
840 device_initialize(&h->dev);
841 h->dev.type = &cciss_host_type;
842 h->dev.bus = &cciss_bus_type;
843 dev_set_name(&h->dev, "%s", h->devname);
844 h->dev.parent = &h->pdev->dev;
845
846 return device_add(&h->dev);
847}
848
849/*
850 * Remove sysfs entries for an hba.
851 */
852static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
853{
854 device_del(&h->dev);
617e1344
SC		 855 put_device(&h->dev); /* final put. */
856}
857
858/* cciss_device_release is called when the reference count
9cef0d2f 859 * of h->drv[x]dev goes to zero.
617e1344
SC		 860 */
861static void cciss_device_release(struct device *dev)
862{
9cef0d2f
SC		 863 drive_info_struct *drv = to_drv(dev);
864 kfree(drv);
7fe06326
AP		 865}
866
867/*
868 * Initialize sysfs for each logical drive. This sets up and registers
869 * the 'c#d#' directory for each individual logical drive under
870 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
871 * /sys/block/cciss!c#d# to this entry.
872 */
617e1344 873static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 874 int drv_index)
875{
617e1344
SC		 876 struct device *dev;
877
9cef0d2f 878 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 879 return 0;
880
9cef0d2f 881 dev = &h->drv[drv_index]->dev;
617e1344
SC		 882 device_initialize(dev);
883 dev->type = &cciss_dev_type;
884 dev->bus = &cciss_bus_type;
885 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
886 dev->parent = &h->dev;
9cef0d2f 887 h->drv[drv_index]->device_initialized = 1;
617e1344 888 return device_add(dev);
7fe06326
AP		 889}
890
891/*
892 * Remove sysfs entries for a logical drive.
893 */
8ce51966
SC		 894static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
895 int ctlr_exiting)
7fe06326 896{
9cef0d2f 897 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 898
899 /* special case for c*d0, we only destroy it on controller exit */
900 if (drv_index == 0 && !ctlr_exiting)
901 return;
902
617e1344
SC		 903 device_del(dev);
904 put_device(dev); /* the "final" put. */
9cef0d2f 905 h->drv[drv_index] = NULL;
7fe06326
AP		 906}
907
7c832835
BH		 908/*
909 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 910 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 911 * which ones are free or in use. For operations that can wait for kmalloc
912 * to possible sleep, this routine can be called with get_from_pool set to 0.
913 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
914 */
915static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 916{
917 CommandList_struct *c;
7c832835 918 int i;
1da177e4
LT		 919 u64bit temp64;
920 dma_addr_t cmd_dma_handle, err_dma_handle;
921
7c832835
BH		 922 if (!get_from_pool) {
923 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
924 sizeof(CommandList_struct), &cmd_dma_handle);
925 if (c == NULL)
926 return NULL;
1da177e4
LT		 927 memset(c, 0, sizeof(CommandList_struct));
928
33079b21
MM		 929 c->cmdindex = -1;
930
7c832835
BH		 931 c->err_info = (ErrorInfo_struct *)
932 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
933 &err_dma_handle);
934
935 if (c->err_info == NULL) {
936 pci_free_consistent(h->pdev,
1da177e4
LT		 937 sizeof(CommandList_struct), c, cmd_dma_handle);
938 return NULL;
939 }
940 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 941 } else { /* get it out of the controllers pool */
942
943 do {
f880632f
MM		 944 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
945 if (i == h->nr_cmds)
7c832835
BH		 946 return NULL;
947 } while (test_and_set_bit
948 (i & (BITS_PER_LONG - 1),
949 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 950#ifdef CCISS_DEBUG
951 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
952#endif
7c832835 953 c = h->cmd_pool + i;
1da177e4 954 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 955 cmd_dma_handle = h->cmd_pool_dhandle
956 + i * sizeof(CommandList_struct);
1da177e4
LT		 957 c->err_info = h->errinfo_pool + i;
958 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 959 err_dma_handle = h->errinfo_pool_dhandle
960 + i * sizeof(ErrorInfo_struct);
961 h->nr_allocs++;
33079b21
MM		 962
963 c->cmdindex = i;
7c832835 964 }
1da177e4 965
8a3173de 966 INIT_HLIST_NODE(&c->list);
1da177e4 967 c->busaddr = (__u32) cmd_dma_handle;
7c832835 968 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 969 c->ErrDesc.Addr.lower = temp64.val32.lower;
970 c->ErrDesc.Addr.upper = temp64.val32.upper;
971 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 972
7c832835
BH		 973 c->ctlr = h->ctlr;
974 return c;
1da177e4
LT		 975}
976
7c832835
BH		 977/*
978 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 979 */
980static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
981{
982 int i;
983 u64bit temp64;
984
7c832835 985 if (!got_from_pool) {
1da177e4
LT		 986 temp64.val32.lower = c->ErrDesc.Addr.lower;
987 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 988 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
989 c->err_info, (dma_addr_t) temp64.val);
990 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
991 c, (dma_addr_t) c->busaddr);
992 } else {
1da177e4 993 i = c - h->cmd_pool;
7c832835
BH		 994 clear_bit(i & (BITS_PER_LONG - 1),
995 h->cmd_pool_bits + (i / BITS_PER_LONG));
996 h->nr_frees++;
997 }
1da177e4
LT		 998}
999
1000static inline ctlr_info_t *get_host(struct gendisk *disk)
1001{
7c832835 1002 return disk->queue->queuedata;
1da177e4
LT		 1003}
1004
1005static inline drive_info_struct *get_drv(struct gendisk *disk)
1006{
1007 return disk->private_data;
1008}
1009
1010/*
1011 * Open. Make sure the device is really there.
1012 */
ef7822c2 1013static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 1014{
ef7822c2
AV		 1015 ctlr_info_t *host = get_host(bdev->bd_disk);
1016 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 1017
1018#ifdef CCISS_DEBUG
ef7822c2 1019 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 1020#endif /* CCISS_DEBUG */
1da177e4 1021
2e043986 1022 if (drv->busy_configuring)
ddd47442 1023 return -EBUSY;
1da177e4
LT		 1024 /*
1025 * Root is allowed to open raw volume zero even if it's not configured
1026 * so array config can still work. Root is also allowed to open any
1027 * volume that has a LUN ID, so it can issue IOCTL to reread the
1028 * disk information. I don't think I really like this
1029 * but I'm already using way to many device nodes to claim another one
1030 * for "raw controller".
1031 */
7a06f789 1032 if (drv->heads == 0) {
ef7822c2 1033 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 1034 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 1035 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 1036 return -ENXIO;
1da177e4 1037 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 1038 } else if (memcmp(drv->LunID, CTLR_LUNID,
1039 sizeof(drv->LunID))) {
1da177e4
LT		 1040 return -ENXIO;
1041 }
1042 }
1043 if (!capable(CAP_SYS_ADMIN))
1044 return -EPERM;
1045 }
1046 drv->usage_count++;
1047 host->usage_count++;
1048 return 0;
1049}
7c832835 1050
6e9624b8
AB		 1051static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode)
1052{
1053 int ret;
1054
1055 lock_kernel();
1056 ret = cciss_open(bdev, mode);
1057 unlock_kernel();
1058
1059 return ret;
1060}
1061
1da177e4
LT		 1062/*
1063 * Close. Sync first.
1064 */
ef7822c2 1065static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 1066{
6e9624b8
AB		 1067 ctlr_info_t *host;
1068 drive_info_struct *drv;
1069
1070 lock_kernel();
1071 host = get_host(disk);
1072 drv = get_drv(disk);
1da177e4
LT		 1073
1074#ifdef CCISS_DEBUG
ef7822c2 1075 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 1076#endif /* CCISS_DEBUG */
1da177e4
LT		 1077
1078 drv->usage_count--;
1079 host->usage_count--;
6e9624b8 1080 unlock_kernel();
1da177e4
LT		 1081 return 0;
1082}
1083
ef7822c2
AV		 1084static int do_ioctl(struct block_device *bdev, fmode_t mode,
1085 unsigned cmd, unsigned long arg)
1da177e4
LT		 1086{
1087 int ret;
1088 lock_kernel();
ef7822c2 1089 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1090 unlock_kernel();
1091 return ret;
1092}
1093
8a6cfeb6
AB		 1094#ifdef CONFIG_COMPAT
1095
ef7822c2
AV		 1096static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1097 unsigned cmd, unsigned long arg);
1098static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1099 unsigned cmd, unsigned long arg);
1da177e4 1100
ef7822c2
AV		 1101static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1102 unsigned cmd, unsigned long arg)
1da177e4
LT		 1103{
1104 switch (cmd) {
1105 case CCISS_GETPCIINFO:
1106 case CCISS_GETINTINFO:
1107 case CCISS_SETINTINFO:
1108 case CCISS_GETNODENAME:
1109 case CCISS_SETNODENAME:
1110 case CCISS_GETHEARTBEAT:
1111 case CCISS_GETBUSTYPES:
1112 case CCISS_GETFIRMVER:
1113 case CCISS_GETDRIVVER:
1114 case CCISS_REVALIDVOLS:
1115 case CCISS_DEREGDISK:
1116 case CCISS_REGNEWDISK:
1117 case CCISS_REGNEWD:
1118 case CCISS_RESCANDISK:
1119 case CCISS_GETLUNINFO:
ef7822c2 1120 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1121
1122 case CCISS_PASSTHRU32:
ef7822c2 1123 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 1124 case CCISS_BIG_PASSTHRU32:
ef7822c2 1125 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 1126
1127 default:
1128 return -ENOIOCTLCMD;
1129 }
1130}
1131
ef7822c2
AV		 1132static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1133 unsigned cmd, unsigned long arg)
1da177e4
LT		 1134{
1135 IOCTL32_Command_struct __user *arg32 =
7c832835 1136 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1137 IOCTL_Command_struct arg64;
1138 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1139 int err;
1140 u32 cp;
1141
1142 err = 0;
7c832835
BH		 1143 err |=
1144 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1145 sizeof(arg64.LUN_info));
1146 err |=
1147 copy_from_user(&arg64.Request, &arg32->Request,
1148 sizeof(arg64.Request));
1149 err |=
1150 copy_from_user(&arg64.error_info, &arg32->error_info,
1151 sizeof(arg64.error_info));
1da177e4
LT		 1152 err |= get_user(arg64.buf_size, &arg32->buf_size);
1153 err |= get_user(cp, &arg32->buf);
1154 arg64.buf = compat_ptr(cp);
1155 err |= copy_to_user(p, &arg64, sizeof(arg64));
1156
1157 if (err)
1158 return -EFAULT;
1159
ef7822c2 1160 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1161 if (err)
1162 return err;
7c832835
BH		 1163 err |=
1164 copy_in_user(&arg32->error_info, &p->error_info,
1165 sizeof(arg32->error_info));
1da177e4
LT		 1166 if (err)
1167 return -EFAULT;
1168 return err;
1169}
1170
ef7822c2
AV		 1171static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1172 unsigned cmd, unsigned long arg)
1da177e4
LT		 1173{
1174 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1175 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1176 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1177 BIG_IOCTL_Command_struct __user *p =
1178 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1179 int err;
1180 u32 cp;
1181
1182 err = 0;
7c832835
BH		 1183 err |=
1184 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1185 sizeof(arg64.LUN_info));
1186 err |=
1187 copy_from_user(&arg64.Request, &arg32->Request,
1188 sizeof(arg64.Request));
1189 err |=
1190 copy_from_user(&arg64.error_info, &arg32->error_info,
1191 sizeof(arg64.error_info));
1da177e4
LT		 1192 err |= get_user(arg64.buf_size, &arg32->buf_size);
1193 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1194 err |= get_user(cp, &arg32->buf);
1195 arg64.buf = compat_ptr(cp);
1196 err |= copy_to_user(p, &arg64, sizeof(arg64));
1197
1198 if (err)
7c832835 1199 return -EFAULT;
1da177e4 1200
ef7822c2 1201 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1202 if (err)
1203 return err;
7c832835
BH		 1204 err |=
1205 copy_in_user(&arg32->error_info, &p->error_info,
1206 sizeof(arg32->error_info));
1da177e4
LT		 1207 if (err)
1208 return -EFAULT;
1209 return err;
1210}
1211#endif
a885c8c4
CH		 1212
1213static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1214{
1215 drive_info_struct *drv = get_drv(bdev->bd_disk);
1216
1217 if (!drv->cylinders)
1218 return -ENXIO;
1219
1220 geo->heads = drv->heads;
1221 geo->sectors = drv->sectors;
1222 geo->cylinders = drv->cylinders;
1223 return 0;
1224}
1225
0a9279cc
MM		 1226static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1227{
1228 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1229 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1230 (void)check_for_unit_attention(host, c);
1231}
1da177e4 1232/*
7c832835 1233 * ioctl
1da177e4 1234 */
ef7822c2 1235static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1236 unsigned int cmd, unsigned long arg)
1da177e4 1237{
1da177e4
LT		 1238 struct gendisk *disk = bdev->bd_disk;
1239 ctlr_info_t *host = get_host(disk);
1240 drive_info_struct *drv = get_drv(disk);
1241 int ctlr = host->ctlr;
1242 void __user *argp = (void __user *)arg;
1243
1244#ifdef CCISS_DEBUG
1245 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1246#endif /* CCISS_DEBUG */
1247
1248 switch (cmd) {
1da177e4 1249 case CCISS_GETPCIINFO:
7c832835
BH		 1250 {
1251 cciss_pci_info_struct pciinfo;
1252
1253 if (!arg)
1254 return -EINVAL;
1255 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1256 pciinfo.bus = host->pdev->bus->number;
1257 pciinfo.dev_fn = host->pdev->devfn;
1258 pciinfo.board_id = host->board_id;
1259 if (copy_to_user
1260 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1261 return -EFAULT;
1262 return 0;
1263 }
1da177e4 1264 case CCISS_GETINTINFO:
7c832835
BH		 1265 {
1266 cciss_coalint_struct intinfo;
1267 if (!arg)
1268 return -EINVAL;
1269 intinfo.delay =
1270 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1271 intinfo.count =
1272 readl(&host->cfgtable->HostWrite.CoalIntCount);
1273 if (copy_to_user
1274 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1275 return -EFAULT;
1276 return 0;
1277 }
1da177e4 1278 case CCISS_SETINTINFO:
1da177e4 1279 {
7c832835
BH		 1280 cciss_coalint_struct intinfo;
1281 unsigned long flags;
1282 int i;
1283
1284 if (!arg)
1285 return -EINVAL;
1286 if (!capable(CAP_SYS_ADMIN))
1287 return -EPERM;
1288 if (copy_from_user
1289 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1290 return -EFAULT;
1291 if ((intinfo.delay == 0) && (intinfo.count == 0))
1292 {
1293// printk("cciss_ioctl: delay and count cannot be 0\n");
1294 return -EINVAL;
1295 }
1296 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1297 /* Update the field, and then ring the doorbell */
1298 writel(intinfo.delay,
1299 &(host->cfgtable->HostWrite.CoalIntDelay));
1300 writel(intinfo.count,
1301 &(host->cfgtable->HostWrite.CoalIntCount));
1302 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1303
1304 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1305 if (!(readl(host->vaddr + SA5_DOORBELL)
1306 & CFGTBL_ChangeReq))
1307 break;
1308 /* delay and try again */
1309 udelay(1000);
1310 }
1311 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1312 if (i >= MAX_IOCTL_CONFIG_WAIT)
1313 return -EAGAIN;
1314 return 0;
1da177e4 1315 }
1da177e4 1316 case CCISS_GETNODENAME:
7c832835
BH		 1317 {
1318 NodeName_type NodeName;
1319 int i;
1320
1321 if (!arg)
1322 return -EINVAL;
1323 for (i = 0; i < 16; i++)
1324 NodeName[i] =
1325 readb(&host->cfgtable->ServerName[i]);
1326 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1327 return -EFAULT;
1328 return 0;
1329 }
1da177e4 1330 case CCISS_SETNODENAME:
7c832835
BH		 1331 {
1332 NodeName_type NodeName;
1333 unsigned long flags;
1334 int i;
1335
1336 if (!arg)
1337 return -EINVAL;
1338 if (!capable(CAP_SYS_ADMIN))
1339 return -EPERM;
1340
1341 if (copy_from_user
1342 (NodeName, argp, sizeof(NodeName_type)))
1343 return -EFAULT;
1344
1345 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1346
1347 /* Update the field, and then ring the doorbell */
1348 for (i = 0; i < 16; i++)
1349 writeb(NodeName[i],
1350 &host->cfgtable->ServerName[i]);
1351
1352 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1353
1354 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1355 if (!(readl(host->vaddr + SA5_DOORBELL)
1356 & CFGTBL_ChangeReq))
1357 break;
1358 /* delay and try again */
1359 udelay(1000);
1360 }
1361 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1362 if (i >= MAX_IOCTL_CONFIG_WAIT)
1363 return -EAGAIN;
1364 return 0;
1365 }
1da177e4
LT		 1366
1367 case CCISS_GETHEARTBEAT:
7c832835
BH		 1368 {
1369 Heartbeat_type heartbeat;
1370
1371 if (!arg)
1372 return -EINVAL;
1373 heartbeat = readl(&host->cfgtable->HeartBeat);
1374 if (copy_to_user
1375 (argp, &heartbeat, sizeof(Heartbeat_type)))
1376 return -EFAULT;
1377 return 0;
1378 }
1da177e4 1379 case CCISS_GETBUSTYPES:
7c832835
BH		 1380 {
1381 BusTypes_type BusTypes;
1382
1383 if (!arg)
1384 return -EINVAL;
1385 BusTypes = readl(&host->cfgtable->BusTypes);
1386 if (copy_to_user
1387 (argp, &BusTypes, sizeof(BusTypes_type)))
1388 return -EFAULT;
1389 return 0;
1390 }
1da177e4 1391 case CCISS_GETFIRMVER:
7c832835
BH		 1392 {
1393 FirmwareVer_type firmware;
1da177e4 1394
7c832835
BH		 1395 if (!arg)
1396 return -EINVAL;
1397 memcpy(firmware, host->firm_ver, 4);
1da177e4 1398
7c832835
BH		 1399 if (copy_to_user
1400 (argp, firmware, sizeof(FirmwareVer_type)))
1401 return -EFAULT;
1402 return 0;
1403 }
1404 case CCISS_GETDRIVVER:
1405 {
1406 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1407
7c832835
BH		 1408 if (!arg)
1409 return -EINVAL;
1da177e4 1410
7c832835
BH		 1411 if (copy_to_user
1412 (argp, &DriverVer, sizeof(DriverVer_type)))
1413 return -EFAULT;
1414 return 0;
1415 }
1da177e4 1416
6ae5ce8e
MM		 1417 case CCISS_DEREGDISK:
1418 case CCISS_REGNEWD:
1da177e4 1419 case CCISS_REVALIDVOLS:
2d11d993 1420 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1421
1422 case CCISS_GETLUNINFO:{
1423 LogvolInfo_struct luninfo;
1424
39ccf9a6
SC		 1425 memcpy(&luninfo.LunID, drv->LunID,
1426 sizeof(luninfo.LunID));
7c832835
BH		 1427 luninfo.num_opens = drv->usage_count;
1428 luninfo.num_parts = 0;
1429 if (copy_to_user(argp, &luninfo,
1430 sizeof(LogvolInfo_struct)))
1431 return -EFAULT;
1432 return 0;
1433 }
1da177e4 1434 case CCISS_PASSTHRU:
1da177e4 1435 {
7c832835
BH		 1436 IOCTL_Command_struct iocommand;
1437 CommandList_struct *c;
1438 char *buff = NULL;
1439 u64bit temp64;
6e9a4738 1440 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1441
7c832835
BH		 1442 if (!arg)
1443 return -EINVAL;
1da177e4 1444
7c832835
BH		 1445 if (!capable(CAP_SYS_RAWIO))
1446 return -EPERM;
1da177e4 1447
7c832835
BH		 1448 if (copy_from_user
1449 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1450 return -EFAULT;
1451 if ((iocommand.buf_size < 1) &&
1452 (iocommand.Request.Type.Direction != XFER_NONE)) {
1453 return -EINVAL;
1454 }
1455#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1456 /* Check kmalloc limits */
1457 if (iocommand.buf_size > 128000)
1458 return -EINVAL;
1459#endif
1460 if (iocommand.buf_size > 0) {
1461 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1462 if (buff == NULL)
1463 return -EFAULT;
1464 }
1465 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1466 /* Copy the data into the buffer we created */
1467 if (copy_from_user
1468 (buff, iocommand.buf, iocommand.buf_size)) {
1469 kfree(buff);
1470 return -EFAULT;
1471 }
1472 } else {
1473 memset(buff, 0, iocommand.buf_size);
1474 }
1475 if ((c = cmd_alloc(host, 0)) == NULL) {
1476 kfree(buff);
1477 return -ENOMEM;
1478 }
b028461d 1479 /* Fill in the command type */
7c832835 1480 c->cmd_type = CMD_IOCTL_PEND;
b028461d 1481 /* Fill in Command Header */
1482 c->Header.ReplyQueue = 0; /* unused in simple mode */
1483 if (iocommand.buf_size > 0) /* buffer to fill */
7c832835
BH		 1484 {
1485 c->Header.SGList = 1;
1486 c->Header.SGTotal = 1;
b028461d 1487 } else /* no buffers to fill */
7c832835
BH		 1488 {
1489 c->Header.SGList = 0;
1490 c->Header.SGTotal = 0;
1491 }
1492 c->Header.LUN = iocommand.LUN_info;
b028461d 1493 /* use the kernel address the cmd block for tag */
1494 c->Header.Tag.lower = c->busaddr;
1da177e4 1495
b028461d 1496 /* Fill in Request block */
7c832835 1497 c->Request = iocommand.Request;
1da177e4 1498
b028461d 1499 /* Fill in the scatter gather information */
7c832835
BH		 1500 if (iocommand.buf_size > 0) {
1501 temp64.val = pci_map_single(host->pdev, buff,
1502 iocommand.buf_size,
1503 PCI_DMA_BIDIRECTIONAL);
1504 c->SG[0].Addr.lower = temp64.val32.lower;
1505 c->SG[0].Addr.upper = temp64.val32.upper;
1506 c->SG[0].Len = iocommand.buf_size;
b028461d 1507 c->SG[0].Ext = 0; /* we are not chaining */
7c832835
BH		 1508 }
1509 c->waiting = &wait;
1510
664a717d 1511 enqueue_cmd_and_start_io(host, c);
7c832835
BH		 1512 wait_for_completion(&wait);
1513
1514 /* unlock the buffers from DMA */
1515 temp64.val32.lower = c->SG[0].Addr.lower;
1516 temp64.val32.upper = c->SG[0].Addr.upper;
1517 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1518 iocommand.buf_size,
1519 PCI_DMA_BIDIRECTIONAL);
1520
0a9279cc
MM		 1521 check_ioctl_unit_attention(host, c);
1522
7c832835
BH		 1523 /* Copy the error information out */
1524 iocommand.error_info = *(c->err_info);
1525 if (copy_to_user
1526 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1527 kfree(buff);
1da177e4
LT		 1528 cmd_free(host, c, 0);
1529 return -EFAULT;
1530 }
7c832835
BH		 1531
1532 if (iocommand.Request.Type.Direction == XFER_READ) {
1533 /* Copy the data out of the buffer we created */
1534 if (copy_to_user
1535 (iocommand.buf, buff, iocommand.buf_size)) {
1536 kfree(buff);
1537 cmd_free(host, c, 0);
1538 return -EFAULT;
1539 }
1540 }
1541 kfree(buff);
1542 cmd_free(host, c, 0);
1543 return 0;
1da177e4 1544 }
7c832835
BH		 1545 case CCISS_BIG_PASSTHRU:{
1546 BIG_IOCTL_Command_struct *ioc;
1547 CommandList_struct *c;
1548 unsigned char **buff = NULL;
1549 int *buff_size = NULL;
1550 u64bit temp64;
7c832835
BH		 1551 BYTE sg_used = 0;
1552 int status = 0;
1553 int i;
6e9a4738 1554 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1555 __u32 left;
1556 __u32 sz;
1557 BYTE __user *data_ptr;
1558
1559 if (!arg)
1560 return -EINVAL;
1561 if (!capable(CAP_SYS_RAWIO))
1562 return -EPERM;
1563 ioc = (BIG_IOCTL_Command_struct *)
1564 kmalloc(sizeof(*ioc), GFP_KERNEL);
1565 if (!ioc) {
1566 status = -ENOMEM;
1567 goto cleanup1;
1568 }
1569 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1570 status = -EFAULT;
1571 goto cleanup1;
1572 }
1573 if ((ioc->buf_size < 1) &&
1574 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1575 status = -EINVAL;
1576 goto cleanup1;
7c832835
BH		 1577 }
1578 /* Check kmalloc limits using all SGs */
1579 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1580 status = -EINVAL;
1581 goto cleanup1;
1582 }
1583 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1584 status = -EINVAL;
1585 goto cleanup1;
1586 }
1587 buff =
1588 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1589 if (!buff) {
1da177e4
LT		 1590 status = -ENOMEM;
1591 goto cleanup1;
1592 }
5cbded58 1593 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1594 GFP_KERNEL);
1595 if (!buff_size) {
1596 status = -ENOMEM;
1597 goto cleanup1;
1598 }
1599 left = ioc->buf_size;
1600 data_ptr = ioc->buf;
1601 while (left) {
1602 sz = (left >
1603 ioc->malloc_size) ? ioc->
1604 malloc_size : left;
1605 buff_size[sg_used] = sz;
1606 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1607 if (buff[sg_used] == NULL) {
1da177e4 1608 status = -ENOMEM;
15534d38
JA		 1609 goto cleanup1;
1610 }
7c832835
BH		 1611 if (ioc->Request.Type.Direction == XFER_WRITE) {
1612 if (copy_from_user
1613 (buff[sg_used], data_ptr, sz)) {
f7108f91 1614 status = -EFAULT;
7c832835
BH		 1615 goto cleanup1;
1616 }
1617 } else {
1618 memset(buff[sg_used], 0, sz);
1619 }
1620 left -= sz;
1621 data_ptr += sz;
1622 sg_used++;
1623 }
1624 if ((c = cmd_alloc(host, 0)) == NULL) {
1625 status = -ENOMEM;
1626 goto cleanup1;
1627 }
1628 c->cmd_type = CMD_IOCTL_PEND;
1629 c->Header.ReplyQueue = 0;
1630
1631 if (ioc->buf_size > 0) {
1632 c->Header.SGList = sg_used;
1633 c->Header.SGTotal = sg_used;
1da177e4 1634 } else {
7c832835
BH		 1635 c->Header.SGList = 0;
1636 c->Header.SGTotal = 0;
1da177e4 1637 }
7c832835
BH		 1638 c->Header.LUN = ioc->LUN_info;
1639 c->Header.Tag.lower = c->busaddr;
1640
1641 c->Request = ioc->Request;
1642 if (ioc->buf_size > 0) {
7c832835
BH		 1643 for (i = 0; i < sg_used; i++) {
1644 temp64.val =
1645 pci_map_single(host->pdev, buff[i],
1646 buff_size[i],
1647 PCI_DMA_BIDIRECTIONAL);
1648 c->SG[i].Addr.lower =
1649 temp64.val32.lower;
1650 c->SG[i].Addr.upper =
1651 temp64.val32.upper;
1652 c->SG[i].Len = buff_size[i];
1653 c->SG[i].Ext = 0; /* we are not chaining */
1654 }
1655 }
1656 c->waiting = &wait;
664a717d 1657 enqueue_cmd_and_start_io(host, c);
7c832835
BH		 1658 wait_for_completion(&wait);
1659 /* unlock the buffers from DMA */
1660 for (i = 0; i < sg_used; i++) {
1661 temp64.val32.lower = c->SG[i].Addr.lower;
1662 temp64.val32.upper = c->SG[i].Addr.upper;
1663 pci_unmap_single(host->pdev,
1664 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1665 PCI_DMA_BIDIRECTIONAL);
1da177e4 1666 }
0a9279cc 1667 check_ioctl_unit_attention(host, c);
7c832835
BH		 1668 /* Copy the error information out */
1669 ioc->error_info = *(c->err_info);
1670 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1671 cmd_free(host, c, 0);
1672 status = -EFAULT;
1673 goto cleanup1;
1674 }
1675 if (ioc->Request.Type.Direction == XFER_READ) {
1676 /* Copy the data out of the buffer we created */
1677 BYTE __user *ptr = ioc->buf;
1678 for (i = 0; i < sg_used; i++) {
1679 if (copy_to_user
1680 (ptr, buff[i], buff_size[i])) {
1681 cmd_free(host, c, 0);
1682 status = -EFAULT;
1683 goto cleanup1;
1684 }
1685 ptr += buff_size[i];
1da177e4 1686 }
1da177e4 1687 }
7c832835
BH		 1688 cmd_free(host, c, 0);
1689 status = 0;
1690 cleanup1:
1691 if (buff) {
1692 for (i = 0; i < sg_used; i++)
1693 kfree(buff[i]);
1694 kfree(buff);
1695 }
1696 kfree(buff_size);
1697 kfree(ioc);
1698 return status;
1da177e4 1699 }
03bbfee5
MMOD		 1700
1701 /* scsi_cmd_ioctl handles these, below, though some are not */
1702 /* very meaningful for cciss. SG_IO is the main one people want. */
1703
1704 case SG_GET_VERSION_NUM:
1705 case SG_SET_TIMEOUT:
1706 case SG_GET_TIMEOUT:
1707 case SG_GET_RESERVED_SIZE:
1708 case SG_SET_RESERVED_SIZE:
1709 case SG_EMULATED_HOST:
1710 case SG_IO:
1711 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1712 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1713
1714 /* scsi_cmd_ioctl would normally handle these, below, but */
1715 /* they aren't a good fit for cciss, as CD-ROMs are */
1716 /* not supported, and we don't have any bus/target/lun */
1717 /* which we present to the kernel. */
1718
1719 case CDROM_SEND_PACKET:
1720 case CDROMCLOSETRAY:
1721 case CDROMEJECT:
1722 case SCSI_IOCTL_GET_IDLUN:
1723 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1724 default:
1725 return -ENOTTY;
1726 }
1da177e4
LT		 1727}
1728
7b30f092
JA		 1729static void cciss_check_queues(ctlr_info_t *h)
1730{
1731 int start_queue = h->next_to_run;
1732 int i;
1733
1734 /* check to see if we have maxed out the number of commands that can
1735 * be placed on the queue. If so then exit. We do this check here
1736 * in case the interrupt we serviced was from an ioctl and did not
1737 * free any new commands.
1738 */
f880632f 1739 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1740 return;
1741
1742 /* We have room on the queue for more commands. Now we need to queue
1743 * them up. We will also keep track of the next queue to run so
1744 * that every queue gets a chance to be started first.
1745 */
1746 for (i = 0; i < h->highest_lun + 1; i++) {
1747 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1748 /* make sure the disk has been added and the drive is real
1749 * because this can be called from the middle of init_one.
1750 */
9cef0d2f
SC		 1751 if (!h->drv[curr_queue])
1752 continue;
1753 if (!(h->drv[curr_queue]->queue) ||
1754 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1755 continue;
1756 blk_start_queue(h->gendisk[curr_queue]->queue);
1757
1758 /* check to see if we have maxed out the number of commands
1759 * that can be placed on the queue.
1760 */
f880632f 1761 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1762 if (curr_queue == start_queue) {
1763 h->next_to_run =
1764 (start_queue + 1) % (h->highest_lun + 1);
1765 break;
1766 } else {
1767 h->next_to_run = curr_queue;
1768 break;
1769 }
7b30f092
JA		 1770 }
1771 }
1772}
1773
ca1e0484
MM		 1774static void cciss_softirq_done(struct request *rq)
1775{
1776 CommandList_struct *cmd = rq->completion_data;
1777 ctlr_info_t *h = hba[cmd->ctlr];
5c07a311 1778 SGDescriptor_struct *curr_sg = cmd->SG;
ca1e0484 1779 u64bit temp64;
664a717d 1780 unsigned long flags;
ca1e0484 1781 int i, ddir;
5c07a311 1782 int sg_index = 0;
ca1e0484
MM		 1783
1784 if (cmd->Request.Type.Direction == XFER_READ)
1785 ddir = PCI_DMA_FROMDEVICE;
1786 else
1787 ddir = PCI_DMA_TODEVICE;
1788
1789 /* command did not need to be retried */
1790 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1791 for (i = 0; i < cmd->Header.SGList; i++) {
5c07a311 1792 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
d45033ef 1793 cciss_unmap_sg_chain_block(h, cmd);
5c07a311 1794 /* Point to the next block */
dccc9b56 1795 curr_sg = h->cmd_sg_list[cmd->cmdindex];
5c07a311
DB		 1796 sg_index = 0;
1797 }
1798 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1799 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1800 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1801 ddir);
1802 ++sg_index;
ca1e0484
MM		 1803 }
1804
ca1e0484
MM		 1805#ifdef CCISS_DEBUG
1806 printk("Done with %p\n", rq);
7c832835 1807#endif /* CCISS_DEBUG */
ca1e0484 1808
c3a4d78c 1809 /* set the residual count for pc requests */
33659ebb 1810 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
c3a4d78c 1811 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1812
c3a4d78c 1813 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1814
ca1e0484 1815 spin_lock_irqsave(&h->lock, flags);
7c832835 1816 cmd_free(h, cmd, 1);
7b30f092 1817 cciss_check_queues(h);
ca1e0484
MM		 1818 spin_unlock_irqrestore(&h->lock, flags);
1819}
1820
39ccf9a6
SC		 1821static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1822 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1823{
9cef0d2f
SC		 1824 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1825 sizeof(h->drv[log_unit]->LunID));
b57695fe 1826}
1827
7fe06326
AP		 1828/* This function gets the SCSI vendor, model, and revision of a logical drive
1829 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1830 * they cannot be read.
1831 */
7b838bde 1832static void cciss_get_device_descr(int ctlr, int logvol,
7fe06326
AP		 1833 char *vendor, char *model, char *rev)
1834{
1835 int rc;
1836 InquiryData_struct *inq_buf;
b57695fe 1837 unsigned char scsi3addr[8];
7fe06326
AP		 1838
1839 *vendor = '\0';
1840 *model = '\0';
1841 *rev = '\0';
1842
1843 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1844 if (!inq_buf)
1845 return;
1846
b57695fe 1847 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1848 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1849 scsi3addr, TYPE_CMD);
7fe06326
AP		 1850 if (rc == IO_OK) {
1851 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1852 vendor[VENDOR_LEN] = '\0';
1853 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1854 model[MODEL_LEN] = '\0';
1855 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1856 rev[REV_LEN] = '\0';
1857 }
1858
1859 kfree(inq_buf);
1860 return;
1861}
1862
a72da29b
MM		 1863/* This function gets the serial number of a logical drive via
1864 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1865 * number cannot be had, for whatever reason, 16 bytes of 0xff
1866 * are returned instead.
1867 */
7b838bde 1868static void cciss_get_serial_no(int ctlr, int logvol,
a72da29b
MM		 1869 unsigned char *serial_no, int buflen)
1870{
1871#define PAGE_83_INQ_BYTES 64
1872 int rc;
1873 unsigned char *buf;
b57695fe 1874 unsigned char scsi3addr[8];
a72da29b
MM		 1875
1876 if (buflen > 16)
1877 buflen = 16;
1878 memset(serial_no, 0xff, buflen);
1879 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1880 if (!buf)
1881 return;
1882 memset(serial_no, 0, buflen);
b57695fe 1883 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1884 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1885 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1886 if (rc == IO_OK)
1887 memcpy(serial_no, &buf[8], buflen);
1888 kfree(buf);
1889 return;
1890}
1891
617e1344
SC		 1892/*
1893 * cciss_add_disk sets up the block device queue for a logical drive
1894 */
1895static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1896 int drv_index)
1897{
1898 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1899 if (!disk->queue)
1900 goto init_queue_failure;
6ae5ce8e
MM		 1901 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1902 disk->major = h->major;
1903 disk->first_minor = drv_index << NWD_SHIFT;
1904 disk->fops = &cciss_fops;
9cef0d2f
SC		 1905 if (cciss_create_ld_sysfs_entry(h, drv_index))
1906 goto cleanup_queue;
1907 disk->private_data = h->drv[drv_index];
1908 disk->driverfs_dev = &h->drv[drv_index]->dev;
6ae5ce8e
MM		 1909
1910 /* Set up queue information */
1911 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1912
1913 /* This is a hardware imposed limit. */
8a78362c 1914 blk_queue_max_segments(disk->queue, h->maxsgentries);
6ae5ce8e 1915
086fa5ff 1916 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
6ae5ce8e
MM		 1917
1918 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1919
1920 disk->queue->queuedata = h;
1921
e1defc4f 1922 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1923 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1924
1925 /* Make sure all queue data is written out before */
9cef0d2f 1926 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1927 /* allows the interrupt handler to start the queue */
1928 wmb();
9cef0d2f 1929 h->drv[drv_index]->queue = disk->queue;
6ae5ce8e 1930 add_disk(disk);
617e1344
SC		 1931 return 0;
1932
1933cleanup_queue:
1934 blk_cleanup_queue(disk->queue);
1935 disk->queue = NULL;
e8074f79 1936init_queue_failure:
617e1344 1937 return -1;
6ae5ce8e
MM		 1938}
1939
ddd47442 1940/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1941 * If the usage_count is zero and it is a heretofore unknown drive, or,
1942 * the drive's capacity, geometry, or serial number has changed,
1943 * then the drive information will be updated and the disk will be
1944 * re-registered with the kernel. If these conditions don't hold,
1945 * then it will be left alone for the next reboot. The exception to this
1946 * is disk 0 which will always be left registered with the kernel since it
1947 * is also the controller node. Any changes to disk 0 will show up on
1948 * the next reboot.
7c832835 1949 */
2d11d993
SC		 1950static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1951 int via_ioctl)
7c832835 1952{
ddd47442
MM		 1953 ctlr_info_t *h = hba[ctlr];
1954 struct gendisk *disk;
ddd47442
MM		 1955 InquiryData_struct *inq_buff = NULL;
1956 unsigned int block_size;
00988a35 1957 sector_t total_size;
ddd47442
MM		 1958 unsigned long flags = 0;
1959 int ret = 0;
a72da29b
MM		 1960 drive_info_struct *drvinfo;
1961
1962 /* Get information about the disk and modify the driver structure */
1963 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1964 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 1965 if (inq_buff == NULL || drvinfo == NULL)
1966 goto mem_msg;
1967
1968 /* testing to see if 16-byte CDBs are already being used */
1969 if (h->cciss_read == CCISS_READ_16) {
7b838bde 1970 cciss_read_capacity_16(h->ctlr, drv_index,
a72da29b
MM		 1971 &total_size, &block_size);
1972
1973 } else {
7b838bde 1974 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
a72da29b
MM		 1975 /* if read_capacity returns all F's this volume is >2TB */
1976 /* in size so we switch to 16-byte CDB's for all */
1977 /* read/write ops */
1978 if (total_size == 0xFFFFFFFFULL) {
7b838bde 1979 cciss_read_capacity_16(ctlr, drv_index,
a72da29b
MM		 1980 &total_size, &block_size);
1981 h->cciss_read = CCISS_READ_16;
1982 h->cciss_write = CCISS_WRITE_16;
1983 } else {
1984 h->cciss_read = CCISS_READ_10;
1985 h->cciss_write = CCISS_WRITE_10;
1986 }
1987 }
1988
7b838bde 1989 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
a72da29b
MM		 1990 inq_buff, drvinfo);
1991 drvinfo->block_size = block_size;
1992 drvinfo->nr_blocks = total_size + 1;
1993
7b838bde 1994 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
7fe06326 1995 drvinfo->model, drvinfo->rev);
7b838bde 1996 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
a72da29b 1997 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 1998 /* Save the lunid in case we deregister the disk, below. */
1999 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
2000 sizeof(drvinfo->LunID));
a72da29b
MM		 2001
2002 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 2003 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 2004 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 2005 h->drv[drv_index]->serial_no, 16) == 0) &&
2006 drvinfo->block_size == h->drv[drv_index]->block_size &&
2007 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
2008 drvinfo->heads == h->drv[drv_index]->heads &&
2009 drvinfo->sectors == h->drv[drv_index]->sectors &&
2010 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 2011 /* The disk is unchanged, nothing to update */
2012 goto freeret;
a72da29b 2013
6ae5ce8e
MM		 2014 /* If we get here it's not the same disk, or something's changed,
2015 * so we need to * deregister it, and re-register it, if it's not
2016 * in use.
2017 * If the disk already exists then deregister it before proceeding
2018 * (unless it's the first disk (for the controller node).
2019 */
9cef0d2f 2020 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 2021 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442 2022 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2023 h->drv[drv_index]->busy_configuring = 1;
ddd47442 2024 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 2025
9cef0d2f 2026 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 2027 * which keeps the interrupt handler from starting
2028 * the queue.
2029 */
2d11d993 2030 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 2031 }
2032
2033 /* If the disk is in use return */
2034 if (ret)
a72da29b
MM		 2035 goto freeret;
2036
6ae5ce8e 2037 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 2038 * and serial number inquiry. If the disk was deregistered
2039 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 2040 */
9cef0d2f
SC		 2041 if (h->drv[drv_index] == NULL) {
2042 drvinfo->device_initialized = 0;
2043 h->drv[drv_index] = drvinfo;
2044 drvinfo = NULL; /* so it won't be freed below. */
2045 } else {
2046 /* special case for cxd0 */
2047 h->drv[drv_index]->block_size = drvinfo->block_size;
2048 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2049 h->drv[drv_index]->heads = drvinfo->heads;
2050 h->drv[drv_index]->sectors = drvinfo->sectors;
2051 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2052 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2053 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2054 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2055 VENDOR_LEN + 1);
2056 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2057 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2058 }
ddd47442
MM		 2059
2060 ++h->num_luns;
2061 disk = h->gendisk[drv_index];
9cef0d2f 2062 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 2063
6ae5ce8e
MM		 2064 /* If it's not disk 0 (drv_index != 0)
2065 * or if it was disk 0, but there was previously
2066 * no actual corresponding configured logical drive
2067 * (raid_leve == -1) then we want to update the
2068 * logical drive's information.
2069 */
361e9b07
SC		 2070 if (drv_index || first_time) {
2071 if (cciss_add_disk(h, disk, drv_index) != 0) {
2072 cciss_free_gendisk(h, drv_index);
9cef0d2f 2073 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2074 printk(KERN_WARNING "cciss:%d could not update "
2075 "disk %d\n", h->ctlr, drv_index);
2076 --h->num_luns;
2077 }
2078 }
ddd47442 2079
6ae5ce8e 2080freeret:
ddd47442 2081 kfree(inq_buff);
a72da29b 2082 kfree(drvinfo);
ddd47442 2083 return;
6ae5ce8e 2084mem_msg:
ddd47442
MM		 2085 printk(KERN_ERR "cciss: out of memory\n");
2086 goto freeret;
2087}
2088
2089/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 2090 * that has a null drv pointer and allocate the drive info struct and
2091 * will return that index This is where new drives will be added.
2092 * If the index to be returned is greater than the highest_lun index for
2093 * the controller then highest_lun is set * to this new index.
2094 * If there are no available indexes or if tha allocation fails, then -1
2095 * is returned. * "controller_node" is used to know if this is a real
2096 * logical drive, or just the controller node, which determines if this
2097 * counts towards highest_lun.
7c832835 2098 */
9cef0d2f 2099static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 2100{
2101 int i;
9cef0d2f 2102 drive_info_struct *drv;
ddd47442 2103
9cef0d2f 2104 /* Search for an empty slot for our drive info */
7c832835 2105 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 2106
2107 /* if not cxd0 case, and it's occupied, skip it. */
2108 if (h->drv[i] && i != 0)
2109 continue;
2110 /*
2111 * If it's cxd0 case, and drv is alloc'ed already, and a
2112 * disk is configured there, skip it.
2113 */
2114 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2115 continue;
2116
2117 /*
2118 * We've found an empty slot. Update highest_lun
2119 * provided this isn't just the fake cxd0 controller node.
2120 */
2121 if (i > h->highest_lun && !controller_node)
2122 h->highest_lun = i;
2123
2124 /* If adding a real disk at cxd0, and it's already alloc'ed */
2125 if (i == 0 && h->drv[i] != NULL)
ddd47442 2126 return i;
9cef0d2f
SC		 2127
2128 /*
2129 * Found an empty slot, not already alloc'ed. Allocate it.
2130 * Mark it with raid_level == -1, so we know it's new later on.
2131 */
2132 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2133 if (!drv)
2134 return -1;
2135 drv->raid_level = -1; /* so we know it's new */
2136 h->drv[i] = drv;
2137 return i;
ddd47442
MM		 2138 }
2139 return -1;
2140}
2141
9cef0d2f
SC		 2142static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2143{
2144 kfree(h->drv[drv_index]);
2145 h->drv[drv_index] = NULL;
2146}
2147
361e9b07
SC		 2148static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2149{
2150 put_disk(h->gendisk[drv_index]);
2151 h->gendisk[drv_index] = NULL;
2152}
2153
6ae5ce8e
MM		 2154/* cciss_add_gendisk finds a free hba[]->drv structure
2155 * and allocates a gendisk if needed, and sets the lunid
2156 * in the drvinfo structure. It returns the index into
2157 * the ->drv[] array, or -1 if none are free.
2158 * is_controller_node indicates whether highest_lun should
2159 * count this disk, or if it's only being added to provide
2160 * a means to talk to the controller in case no logical
2161 * drives have yet been configured.
2162 */
39ccf9a6
SC		 2163static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2164 int controller_node)
6ae5ce8e
MM		 2165{
2166 int drv_index;
2167
9cef0d2f 2168 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2169 if (drv_index == -1)
2170 return -1;
8ce51966 2171
6ae5ce8e
MM		 2172 /*Check if the gendisk needs to be allocated */
2173 if (!h->gendisk[drv_index]) {
2174 h->gendisk[drv_index] =
2175 alloc_disk(1 << NWD_SHIFT);
2176 if (!h->gendisk[drv_index]) {
2177 printk(KERN_ERR "cciss%d: could not "
2178 "allocate a new disk %d\n",
2179 h->ctlr, drv_index);
9cef0d2f 2180 goto err_free_drive_info;
6ae5ce8e
MM		 2181 }
2182 }
9cef0d2f
SC		 2183 memcpy(h->drv[drv_index]->LunID, lunid,
2184 sizeof(h->drv[drv_index]->LunID));
2185 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2186 goto err_free_disk;
6ae5ce8e
MM		 2187 /* Don't need to mark this busy because nobody */
2188 /* else knows about this disk yet to contend */
2189 /* for access to it. */
9cef0d2f 2190 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2191 wmb();
2192 return drv_index;
7fe06326
AP		 2193
2194err_free_disk:
361e9b07 2195 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2196err_free_drive_info:
2197 cciss_free_drive_info(h, drv_index);
7fe06326 2198 return -1;
6ae5ce8e
MM		 2199}
2200
2201/* This is for the special case of a controller which
2202 * has no logical drives. In this case, we still need
2203 * to register a disk so the controller can be accessed
2204 * by the Array Config Utility.
2205 */
2206static void cciss_add_controller_node(ctlr_info_t *h)
2207{
2208 struct gendisk *disk;
2209 int drv_index;
2210
2211 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2212 return;
2213
39ccf9a6 2214 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2215 if (drv_index == -1)
2216 goto error;
9cef0d2f
SC		 2217 h->drv[drv_index]->block_size = 512;
2218 h->drv[drv_index]->nr_blocks = 0;
2219 h->drv[drv_index]->heads = 0;
2220 h->drv[drv_index]->sectors = 0;
2221 h->drv[drv_index]->cylinders = 0;
2222 h->drv[drv_index]->raid_level = -1;
2223 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2224 disk = h->gendisk[drv_index];
361e9b07
SC		 2225 if (cciss_add_disk(h, disk, drv_index) == 0)
2226 return;
2227 cciss_free_gendisk(h, drv_index);
9cef0d2f 2228 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2229error:
2230 printk(KERN_WARNING "cciss%d: could not "
2231 "add disk 0.\n", h->ctlr);
2232 return;
6ae5ce8e
MM		 2233}
2234
ddd47442 2235/* This function will add and remove logical drives from the Logical
d14c4ab5 2236 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2237 * so that mount points are preserved until the next reboot. This allows
2238 * for the removal of logical drives in the middle of the drive array
2239 * without a re-ordering of those drives.
2240 * INPUT
2241 * h = The controller to perform the operations on
7c832835 2242 */
2d11d993
SC		 2243static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2244 int via_ioctl)
1da177e4 2245{
ddd47442
MM		 2246 int ctlr = h->ctlr;
2247 int num_luns;
2248 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2249 int return_code;
2250 int listlength = 0;
2251 int i;
2252 int drv_found;
2253 int drv_index = 0;
39ccf9a6 2254 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2255 unsigned long flags;
ddd47442 2256
6ae5ce8e
MM		 2257 if (!capable(CAP_SYS_RAWIO))
2258 return -EPERM;
2259
ddd47442
MM		 2260 /* Set busy_configuring flag for this operation */
2261 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2262 if (h->busy_configuring) {
ddd47442
MM		 2263 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2264 return -EBUSY;
2265 }
2266 h->busy_configuring = 1;
a72da29b 2267 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2268
a72da29b
MM		 2269 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2270 if (ld_buff == NULL)
2271 goto mem_msg;
2272
2273 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2274 sizeof(ReportLunData_struct),
2275 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2276
a72da29b
MM		 2277 if (return_code == IO_OK)
2278 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2279 else { /* reading number of logical volumes failed */
2280 printk(KERN_WARNING "cciss: report logical volume"
2281 " command failed\n");
2282 listlength = 0;
2283 goto freeret;
2284 }
2285
2286 num_luns = listlength / 8; /* 8 bytes per entry */
2287 if (num_luns > CISS_MAX_LUN) {
2288 num_luns = CISS_MAX_LUN;
2289 printk(KERN_WARNING "cciss: more luns configured"
2290 " on controller than can be handled by"
2291 " this driver.\n");
2292 }
2293
6ae5ce8e
MM		 2294 if (num_luns == 0)
2295 cciss_add_controller_node(h);
2296
2297 /* Compare controller drive array to driver's drive array
2298 * to see if any drives are missing on the controller due
2299 * to action of Array Config Utility (user deletes drive)
2300 * and deregister logical drives which have disappeared.
2301 */
a72da29b
MM		 2302 for (i = 0; i <= h->highest_lun; i++) {
2303 int j;
2304 drv_found = 0;
d8a0be6a
SC		 2305
2306 /* skip holes in the array from already deleted drives */
9cef0d2f 2307 if (h->drv[i] == NULL)
d8a0be6a
SC		 2308 continue;
2309
a72da29b 2310 for (j = 0; j < num_luns; j++) {
39ccf9a6 2311 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2312 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2313 sizeof(lunid)) == 0) {
a72da29b
MM		 2314 drv_found = 1;
2315 break;
2316 }
2317 }
2318 if (!drv_found) {
2319 /* Deregister it from the OS, it's gone. */
2320 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2321 h->drv[i]->busy_configuring = 1;
a72da29b 2322 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2323 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2324 if (h->drv[i] != NULL)
2325 h->drv[i]->busy_configuring = 0;
ddd47442 2326 }
a72da29b 2327 }
ddd47442 2328
a72da29b
MM		 2329 /* Compare controller drive array to driver's drive array.
2330 * Check for updates in the drive information and any new drives
2331 * on the controller due to ACU adding logical drives, or changing
2332 * a logical drive's size, etc. Reregister any new/changed drives
2333 */
2334 for (i = 0; i < num_luns; i++) {
2335 int j;
ddd47442 2336
a72da29b 2337 drv_found = 0;
ddd47442 2338
39ccf9a6 2339 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2340 /* Find if the LUN is already in the drive array
2341 * of the driver. If so then update its info
2342 * if not in use. If it does not exist then find
2343 * the first free index and add it.
2344 */
2345 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2346 if (h->drv[j] != NULL &&
2347 memcmp(h->drv[j]->LunID, lunid,
2348 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2349 drv_index = j;
2350 drv_found = 1;
2351 break;
ddd47442 2352 }
a72da29b 2353 }
ddd47442 2354
a72da29b
MM		 2355 /* check if the drive was found already in the array */
2356 if (!drv_found) {
eece695f 2357 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2358 if (drv_index == -1)
2359 goto freeret;
a72da29b 2360 }
2d11d993
SC		 2361 cciss_update_drive_info(ctlr, drv_index, first_time,
2362 via_ioctl);
a72da29b 2363 } /* end for */
ddd47442 2364
6ae5ce8e 2365freeret:
ddd47442
MM		 2366 kfree(ld_buff);
2367 h->busy_configuring = 0;
2368 /* We return -1 here to tell the ACU that we have registered/updated
2369 * all of the drives that we can and to keep it from calling us
2370 * additional times.
7c832835 2371 */
ddd47442 2372 return -1;
6ae5ce8e 2373mem_msg:
ddd47442 2374 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2375 h->busy_configuring = 0;
ddd47442
MM		 2376 goto freeret;
2377}
2378
9ddb27b4
SC		 2379static void cciss_clear_drive_info(drive_info_struct *drive_info)
2380{
2381 /* zero out the disk size info */
2382 drive_info->nr_blocks = 0;
2383 drive_info->block_size = 0;
2384 drive_info->heads = 0;
2385 drive_info->sectors = 0;
2386 drive_info->cylinders = 0;
2387 drive_info->raid_level = -1;
2388 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2389 memset(drive_info->model, 0, sizeof(drive_info->model));
2390 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2391 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2392 /*
2393 * don't clear the LUNID though, we need to remember which
2394 * one this one is.
2395 */
2396}
2397
ddd47442
MM		 2398/* This function will deregister the disk and it's queue from the
2399 * kernel. It must be called with the controller lock held and the
2400 * drv structures busy_configuring flag set. It's parameters are:
2401 *
2402 * disk = This is the disk to be deregistered
2403 * drv = This is the drive_info_struct associated with the disk to be
2404 * deregistered. It contains information about the disk used
2405 * by the driver.
2406 * clear_all = This flag determines whether or not the disk information
2407 * is going to be completely cleared out and the highest_lun
2408 * reset. Sometimes we want to clear out information about
d14c4ab5 2409 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2410 * the highest_lun should be left unchanged and the LunID
2411 * should not be cleared.
2d11d993
SC		 2412 * via_ioctl
2413 * This indicates whether we've reached this path via ioctl.
2414 * This affects the maximum usage count allowed for c0d0 to be messed with.
2415 * If this path is reached via ioctl(), then the max_usage_count will
2416 * be 1, as the process calling ioctl() has got to have the device open.
2417 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2418*/
a0ea8622 2419static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2420 int clear_all, int via_ioctl)
ddd47442 2421{
799202cb 2422 int i;
a0ea8622
SC		 2423 struct gendisk *disk;
2424 drive_info_struct *drv;
9cef0d2f 2425 int recalculate_highest_lun;
1da177e4
LT		 2426
2427 if (!capable(CAP_SYS_RAWIO))
2428 return -EPERM;
2429
9cef0d2f 2430 drv = h->drv[drv_index];
a0ea8622
SC		 2431 disk = h->gendisk[drv_index];
2432
1da177e4 2433 /* make sure logical volume is NOT is use */
7c832835 2434 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2435 if (drv->usage_count > via_ioctl)
7c832835
BH		 2436 return -EBUSY;
2437 } else if (drv->usage_count > 0)
2438 return -EBUSY;
1da177e4 2439
9cef0d2f
SC		 2440 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2441
ddd47442
MM		 2442 /* invalidate the devices and deregister the disk. If it is disk
2443 * zero do not deregister it but just zero out it's values. This
2444 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2445 */
2446 if (h->gendisk[0] != disk) {
5a9df732 2447 struct request_queue *q = disk->queue;
097d0264 2448 if (disk->flags & GENHD_FL_UP) {
8ce51966 2449 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2450 del_gendisk(disk);
5a9df732 2451 }
9cef0d2f 2452 if (q)
5a9df732 2453 blk_cleanup_queue(q);
5a9df732
AB		 2454 /* If clear_all is set then we are deleting the logical
2455 * drive, not just refreshing its info. For drives
2456 * other than disk 0 we will call put_disk. We do not
2457 * do this for disk 0 as we need it to be able to
2458 * configure the controller.
a72da29b 2459 */
5a9df732
AB		 2460 if (clear_all){
2461 /* This isn't pretty, but we need to find the
2462 * disk in our array and NULL our the pointer.
2463 * This is so that we will call alloc_disk if
2464 * this index is used again later.
a72da29b 2465 */
5a9df732 2466 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2467 if (h->gendisk[i] == disk) {
5a9df732
AB		 2468 h->gendisk[i] = NULL;
2469 break;
799202cb 2470 }
799202cb 2471 }
5a9df732 2472 put_disk(disk);
ddd47442 2473 }
799202cb
MM		 2474 } else {
2475 set_capacity(disk, 0);
9cef0d2f 2476 cciss_clear_drive_info(drv);
ddd47442
MM		 2477 }
2478
2479 --h->num_luns;
ddd47442 2480
9cef0d2f
SC		 2481 /* if it was the last disk, find the new hightest lun */
2482 if (clear_all && recalculate_highest_lun) {
c2d45b4d 2483 int newhighest = -1;
9cef0d2f
SC		 2484 for (i = 0; i <= h->highest_lun; i++) {
2485 /* if the disk has size > 0, it is available */
2486 if (h->drv[i] && h->drv[i]->heads)
2487 newhighest = i;
1da177e4 2488 }
9cef0d2f 2489 h->highest_lun = newhighest;
ddd47442 2490 }
e2019b58 2491 return 0;
1da177e4 2492}
ddd47442 2493
b57695fe 2494static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2495 size_t size, __u8 page_code, unsigned char *scsi3addr,
2496 int cmd_type)
1da177e4 2497{
7c832835 2498 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2499 u64bit buff_dma_handle;
2500 int status = IO_OK;
2501
2502 c->cmd_type = CMD_IOCTL_PEND;
2503 c->Header.ReplyQueue = 0;
7c832835 2504 if (buff != NULL) {
1da177e4 2505 c->Header.SGList = 1;
7c832835 2506 c->Header.SGTotal = 1;
1da177e4
LT		 2507 } else {
2508 c->Header.SGList = 0;
7c832835 2509 c->Header.SGTotal = 0;
1da177e4
LT		 2510 }
2511 c->Header.Tag.lower = c->busaddr;
b57695fe 2512 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2513
2514 c->Request.Type.Type = cmd_type;
2515 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2516 switch (cmd) {
2517 case CISS_INQUIRY:
1da177e4 2518 /* are we trying to read a vital product page */
7c832835 2519 if (page_code != 0) {
1da177e4
LT		 2520 c->Request.CDB[1] = 0x01;
2521 c->Request.CDB[2] = page_code;
2522 }
2523 c->Request.CDBLen = 6;
7c832835 2524 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2525 c->Request.Type.Direction = XFER_READ;
2526 c->Request.Timeout = 0;
7c832835
BH		 2527 c->Request.CDB[0] = CISS_INQUIRY;
2528 c->Request.CDB[4] = size & 0xFF;
2529 break;
1da177e4
LT		 2530 case CISS_REPORT_LOG:
2531 case CISS_REPORT_PHYS:
7c832835 2532 /* Talking to controller so It's a physical command
1da177e4 2533 mode = 00 target = 0. Nothing to write.
7c832835 2534 */
1da177e4
LT		 2535 c->Request.CDBLen = 12;
2536 c->Request.Type.Attribute = ATTR_SIMPLE;
2537 c->Request.Type.Direction = XFER_READ;
2538 c->Request.Timeout = 0;
2539 c->Request.CDB[0] = cmd;
b028461d 2540 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
1da177e4
LT		 2541 c->Request.CDB[7] = (size >> 16) & 0xFF;
2542 c->Request.CDB[8] = (size >> 8) & 0xFF;
2543 c->Request.CDB[9] = size & 0xFF;
2544 break;
2545
2546 case CCISS_READ_CAPACITY:
1da177e4
LT		 2547 c->Request.CDBLen = 10;
2548 c->Request.Type.Attribute = ATTR_SIMPLE;
2549 c->Request.Type.Direction = XFER_READ;
2550 c->Request.Timeout = 0;
2551 c->Request.CDB[0] = cmd;
7c832835 2552 break;
00988a35 2553 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2554 c->Request.CDBLen = 16;
2555 c->Request.Type.Attribute = ATTR_SIMPLE;
2556 c->Request.Type.Direction = XFER_READ;
2557 c->Request.Timeout = 0;
2558 c->Request.CDB[0] = cmd;
2559 c->Request.CDB[1] = 0x10;
2560 c->Request.CDB[10] = (size >> 24) & 0xFF;
2561 c->Request.CDB[11] = (size >> 16) & 0xFF;
2562 c->Request.CDB[12] = (size >> 8) & 0xFF;
2563 c->Request.CDB[13] = size & 0xFF;
2564 c->Request.Timeout = 0;
2565 c->Request.CDB[0] = cmd;
2566 break;
1da177e4
LT		 2567 case CCISS_CACHE_FLUSH:
2568 c->Request.CDBLen = 12;
2569 c->Request.Type.Attribute = ATTR_SIMPLE;
2570 c->Request.Type.Direction = XFER_WRITE;
2571 c->Request.Timeout = 0;
2572 c->Request.CDB[0] = BMIC_WRITE;
2573 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2574 break;
88f627ae 2575 case TEST_UNIT_READY:
88f627ae
SC		 2576 c->Request.CDBLen = 6;
2577 c->Request.Type.Attribute = ATTR_SIMPLE;
2578 c->Request.Type.Direction = XFER_NONE;
2579 c->Request.Timeout = 0;
2580 break;
1da177e4
LT		 2581 default:
2582 printk(KERN_WARNING
7c832835 2583 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2584 return IO_ERROR;
1da177e4
LT		 2585 }
2586 } else if (cmd_type == TYPE_MSG) {
2587 switch (cmd) {
7c832835 2588 case 0: /* ABORT message */
3da8b713 2589 c->Request.CDBLen = 12;
2590 c->Request.Type.Attribute = ATTR_SIMPLE;
2591 c->Request.Type.Direction = XFER_WRITE;
2592 c->Request.Timeout = 0;
7c832835
BH		 2593 c->Request.CDB[0] = cmd; /* abort */
2594 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2595 /* buff contains the tag of the command to abort */
2596 memcpy(&c->Request.CDB[4], buff, 8);
2597 break;
7c832835 2598 case 1: /* RESET message */
88f627ae 2599 c->Request.CDBLen = 16;
3da8b713 2600 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2601 c->Request.Type.Direction = XFER_NONE;
3da8b713 2602 c->Request.Timeout = 0;
2603 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2604 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2605 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2606 break;
1da177e4
LT		 2607 case 3: /* No-Op message */
2608 c->Request.CDBLen = 1;
2609 c->Request.Type.Attribute = ATTR_SIMPLE;
2610 c->Request.Type.Direction = XFER_WRITE;
2611 c->Request.Timeout = 0;
2612 c->Request.CDB[0] = cmd;
2613 break;
2614 default:
2615 printk(KERN_WARNING
7c832835 2616 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2617 return IO_ERROR;
2618 }
2619 } else {
2620 printk(KERN_WARNING
7c832835 2621 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2622 return IO_ERROR;
2623 }
2624 /* Fill in the scatter gather information */
2625 if (size > 0) {
2626 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2627 buff, size,
2628 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2629 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2630 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2631 c->SG[0].Len = size;
7c832835 2632 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2633 }
2634 return status;
2635}
7c832835 2636
3c2ab402 2637static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2638{
2639 switch (c->err_info->ScsiStatus) {
2640 case SAM_STAT_GOOD:
2641 return IO_OK;
2642 case SAM_STAT_CHECK_CONDITION:
2643 switch (0xf & c->err_info->SenseInfo[2]) {
2644 case 0: return IO_OK; /* no sense */
2645 case 1: return IO_OK; /* recovered error */
2646 default:
c08fac65
SC		 2647 if (check_for_unit_attention(h, c))
2648 return IO_NEEDS_RETRY;
3c2ab402 2649 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2650 "check condition, sense key = 0x%02x\n",
2651 h->ctlr, c->Request.CDB[0],
2652 c->err_info->SenseInfo[2]);
2653 }
2654 break;
2655 default:
2656 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2657 "scsi status = 0x%02x\n", h->ctlr,
2658 c->Request.CDB[0], c->err_info->ScsiStatus);
2659 break;
2660 }
2661 return IO_ERROR;
2662}
2663
789a424a 2664static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2665{
5390cfc3 2666 int return_status = IO_OK;
7c832835 2667
789a424a 2668 if (c->err_info->CommandStatus == CMD_SUCCESS)
2669 return IO_OK;
5390cfc3 2670
2671 switch (c->err_info->CommandStatus) {
2672 case CMD_TARGET_STATUS:
3c2ab402 2673 return_status = check_target_status(h, c);
5390cfc3 2674 break;
2675 case CMD_DATA_UNDERRUN:
2676 case CMD_DATA_OVERRUN:
2677 /* expected for inquiry and report lun commands */
2678 break;
2679 case CMD_INVALID:
789a424a 2680 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2681 "reported invalid\n", c->Request.CDB[0]);
2682 return_status = IO_ERROR;
2683 break;
2684 case CMD_PROTOCOL_ERR:
2685 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2686 "protocol error \n", c->Request.CDB[0]);
2687 return_status = IO_ERROR;
2688 break;
2689 case CMD_HARDWARE_ERR:
2690 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2691 " hardware error\n", c->Request.CDB[0]);
2692 return_status = IO_ERROR;
2693 break;
2694 case CMD_CONNECTION_LOST:
2695 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2696 "connection lost\n", c->Request.CDB[0]);
2697 return_status = IO_ERROR;
2698 break;
2699 case CMD_ABORTED:
2700 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2701 "aborted\n", c->Request.CDB[0]);
2702 return_status = IO_ERROR;
2703 break;
2704 case CMD_ABORT_FAILED:
2705 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2706 "abort failed\n", c->Request.CDB[0]);
2707 return_status = IO_ERROR;
2708 break;
2709 case CMD_UNSOLICITED_ABORT:
2710 printk(KERN_WARNING
2711 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2712 c->Request.CDB[0]);
789a424a 2713 return_status = IO_NEEDS_RETRY;
5390cfc3 2714 break;
2715 default:
2716 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2717 "unknown status %x\n", c->Request.CDB[0],
2718 c->err_info->CommandStatus);
2719 return_status = IO_ERROR;
7c832835 2720 }
789a424a 2721 return return_status;
2722}
2723
2724static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2725 int attempt_retry)
2726{
2727 DECLARE_COMPLETION_ONSTACK(wait);
2728 u64bit buff_dma_handle;
789a424a 2729 int return_status = IO_OK;
2730
2731resend_cmd2:
2732 c->waiting = &wait;
664a717d 2733 enqueue_cmd_and_start_io(h, c);
789a424a 2734
2735 wait_for_completion(&wait);
2736
2737 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2738 goto command_done;
2739
2740 return_status = process_sendcmd_error(h, c);
2741
2742 if (return_status == IO_NEEDS_RETRY &&
2743 c->retry_count < MAX_CMD_RETRIES) {
2744 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2745 c->Request.CDB[0]);
2746 c->retry_count++;
2747 /* erase the old error information */
2748 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2749 return_status = IO_OK;
2750 INIT_COMPLETION(wait);
2751 goto resend_cmd2;
2752 }
5390cfc3 2753
2754command_done:
1da177e4 2755 /* unlock the buffers from DMA */
bb2a37bf
MM		 2756 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2757 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2758 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2759 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2760 return return_status;
2761}
2762
b57695fe 2763static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2764 __u8 page_code, unsigned char scsi3addr[],
2765 int cmd_type)
5390cfc3 2766{
2767 ctlr_info_t *h = hba[ctlr];
2768 CommandList_struct *c;
2769 int return_status;
2770
2771 c = cmd_alloc(h, 0);
2772 if (!c)
2773 return -ENOMEM;
b57695fe 2774 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2775 scsi3addr, cmd_type);
5390cfc3 2776 if (return_status == IO_OK)
789a424a 2777 return_status = sendcmd_withirq_core(h, c, 1);
2778
1da177e4 2779 cmd_free(h, c, 0);
7c832835 2780 return return_status;
1da177e4 2781}
7c832835 2782
1da177e4 2783static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 2784 sector_t total_size,
7c832835
BH		 2785 unsigned int block_size,
2786 InquiryData_struct *inq_buff,
2787 drive_info_struct *drv)
1da177e4
LT		 2788{
2789 int return_code;
00988a35 2790 unsigned long t;
b57695fe 2791 unsigned char scsi3addr[8];
00988a35 2792
1da177e4 2793 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2794 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2795 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2796 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2797 if (return_code == IO_OK) {
7c832835 2798 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2799 printk(KERN_WARNING
7c832835
BH		 2800 "cciss: reading geometry failed, volume "
2801 "does not support reading geometry\n");
1da177e4 2802 drv->heads = 255;
b028461d 2803 drv->sectors = 32; /* Sectors per track */
7f42d3b8 2804 drv->cylinders = total_size + 1;
89f97ad1 2805 drv->raid_level = RAID_UNKNOWN;
1da177e4 2806 } else {
1da177e4
LT		 2807 drv->heads = inq_buff->data_byte[6];
2808 drv->sectors = inq_buff->data_byte[7];
2809 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2810 drv->cylinders += inq_buff->data_byte[5];
2811 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2812 }
2813 drv->block_size = block_size;
97c06978 2814 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2815 t = drv->heads * drv->sectors;
2816 if (t > 1) {
97c06978
MMOD		 2817 sector_t real_size = total_size + 1;
2818 unsigned long rem = sector_div(real_size, t);
3f7705ea 2819 if (rem)
97c06978
MMOD		 2820 real_size++;
2821 drv->cylinders = real_size;
1da177e4 2822 }
7c832835 2823 } else { /* Get geometry failed */
1da177e4
LT		 2824 printk(KERN_WARNING "cciss: reading geometry failed\n");
2825 }
1da177e4 2826}
7c832835 2827
1da177e4 2828static void
7b838bde 2829cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
7c832835 2830 unsigned int *block_size)
1da177e4 2831{
00988a35 2832 ReadCapdata_struct *buf;
1da177e4 2833 int return_code;
b57695fe 2834 unsigned char scsi3addr[8];
1aebe187
MK		 2835
2836 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2837 if (!buf) {
00988a35
MMOD		 2838 printk(KERN_WARNING "cciss: out of memory\n");
2839 return;
2840 }
1aebe187 2841
b57695fe 2842 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2843 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2844 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2845 if (return_code == IO_OK) {
4c1f2b31
AV		 2846 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2847 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2848 } else { /* read capacity command failed */
1da177e4
LT		 2849 printk(KERN_WARNING "cciss: read capacity failed\n");
2850 *total_size = 0;
2851 *block_size = BLOCK_SIZE;
2852 }
00988a35 2853 kfree(buf);
00988a35
MMOD		 2854}
2855
7b838bde
SC		 2856static void cciss_read_capacity_16(int ctlr, int logvol,
2857 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD		 2858{
2859 ReadCapdata_struct_16 *buf;
2860 int return_code;
b57695fe 2861 unsigned char scsi3addr[8];
1aebe187
MK		 2862
2863 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2864 if (!buf) {
00988a35
MMOD		 2865 printk(KERN_WARNING "cciss: out of memory\n");
2866 return;
2867 }
1aebe187 2868
b57695fe 2869 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2870 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2871 ctlr, buf, sizeof(ReadCapdata_struct_16),
2872 0, scsi3addr, TYPE_CMD);
00988a35 2873 if (return_code == IO_OK) {
4c1f2b31
AV		 2874 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2875 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2876 } else { /* read capacity command failed */
2877 printk(KERN_WARNING "cciss: read capacity failed\n");
2878 *total_size = 0;
2879 *block_size = BLOCK_SIZE;
2880 }
7b92aadf 2881 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2882 (unsigned long long)*total_size+1, *block_size);
00988a35 2883 kfree(buf);
1da177e4
LT		 2884}
2885
1da177e4
LT		 2886static int cciss_revalidate(struct gendisk *disk)
2887{
2888 ctlr_info_t *h = get_host(disk);
2889 drive_info_struct *drv = get_drv(disk);
2890 int logvol;
7c832835 2891 int FOUND = 0;
1da177e4 2892 unsigned int block_size;
00988a35 2893 sector_t total_size;
1da177e4
LT		 2894 InquiryData_struct *inq_buff = NULL;
2895
7c832835 2896 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2897 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2898 sizeof(drv->LunID)) == 0) {
7c832835 2899 FOUND = 1;
1da177e4
LT		 2900 break;
2901 }
2902 }
2903
7c832835
BH		 2904 if (!FOUND)
2905 return 1;
1da177e4 2906
7c832835
BH		 2907 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2908 if (inq_buff == NULL) {
2909 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2910 return 1;
2911 }
00988a35 2912 if (h->cciss_read == CCISS_READ_10) {
7b838bde 2913 cciss_read_capacity(h->ctlr, logvol,
00988a35
MMOD		 2914 &total_size, &block_size);
2915 } else {
7b838bde 2916 cciss_read_capacity_16(h->ctlr, logvol,
00988a35
MMOD		 2917 &total_size, &block_size);
2918 }
7b838bde 2919 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
7c832835 2920 inq_buff, drv);
1da177e4 2921
e1defc4f 2922 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2923 set_capacity(disk, drv->nr_blocks);
2924
1da177e4
LT		 2925 kfree(inq_buff);
2926 return 0;
2927}
2928
1da177e4
LT		 2929/*
2930 * Map (physical) PCI mem into (virtual) kernel space
2931 */
2932static void __iomem *remap_pci_mem(ulong base, ulong size)
2933{
7c832835
BH		 2934 ulong page_base = ((ulong) base) & PAGE_MASK;
2935 ulong page_offs = ((ulong) base) - page_base;
2936 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2937
7c832835 2938 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2939}
2940
7c832835
BH		 2941/*
2942 * Takes jobs of the Q and sends them to the hardware, then puts it on
2943 * the Q to wait for completion.
2944 */
2945static void start_io(ctlr_info_t *h)
1da177e4
LT		 2946{
2947 CommandList_struct *c;
7c832835 2948
8a3173de
JA		 2949 while (!hlist_empty(&h->reqQ)) {
2950 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2951 /* can't do anything if fifo is full */
2952 if ((h->access.fifo_full(h))) {
2953 printk(KERN_WARNING "cciss: fifo full\n");
2954 break;
2955 }
2956
7c832835 2957 /* Get the first entry from the Request Q */
8a3173de 2958 removeQ(c);
1da177e4 2959 h->Qdepth--;
7c832835
BH		 2960
2961 /* Tell the controller execute command */
1da177e4 2962 h->access.submit_command(h, c);
7c832835
BH		 2963
2964 /* Put job onto the completed Q */
8a3173de 2965 addQ(&h->cmpQ, c);
1da177e4
LT		 2966 }
2967}
7c832835 2968
1da177e4
LT		 2969/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2970/* Zeros out the error record and then resends the command back */
2971/* to the controller */
7c832835 2972static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2973{
2974 /* erase the old error information */
2975 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2976
2977 /* add it to software queue and then send it to the controller */
8a3173de 2978 addQ(&h->reqQ, c);
1da177e4 2979 h->Qdepth++;
7c832835 2980 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2981 h->maxQsinceinit = h->Qdepth;
2982
2983 start_io(h);
2984}
a9925a06 2985
1a614f50
SC		 2986static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2987 unsigned int msg_byte, unsigned int host_byte,
2988 unsigned int driver_byte)
2989{
2990 /* inverse of macros in scsi.h */
2991 return (scsi_status_byte & 0xff) |
2992 ((msg_byte & 0xff) << 8) |
2993 ((host_byte & 0xff) << 16) |
2994 ((driver_byte & 0xff) << 24);
2995}
2996
0a9279cc
MM		 2997static inline int evaluate_target_status(ctlr_info_t *h,
2998 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2999{
3000 unsigned char sense_key;
1a614f50
SC		 3001 unsigned char status_byte, msg_byte, host_byte, driver_byte;
3002 int error_value;
3003
0a9279cc 3004 *retry_cmd = 0;
1a614f50
SC		 3005 /* If we get in here, it means we got "target status", that is, scsi status */
3006 status_byte = cmd->err_info->ScsiStatus;
3007 driver_byte = DRIVER_OK;
3008 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3009
33659ebb 3010 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
1a614f50
SC		 3011 host_byte = DID_PASSTHROUGH;
3012 else
3013 host_byte = DID_OK;
3014
3015 error_value = make_status_bytes(status_byte, msg_byte,
3016 host_byte, driver_byte);
03bbfee5 3017
1a614f50 3018 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
33659ebb 3019 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
03bbfee5
MMOD		 3020 printk(KERN_WARNING "cciss: cmd %p "
3021 "has SCSI Status 0x%x\n",
3022 cmd, cmd->err_info->ScsiStatus);
1a614f50 3023 return error_value;
03bbfee5
MMOD		 3024 }
3025
3026 /* check the sense key */
3027 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3028 /* no status or recovered error */
33659ebb
CH		 3029 if (((sense_key == 0x0) || (sense_key == 0x1)) &&
3030 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
1a614f50 3031 error_value = 0;
03bbfee5 3032
0a9279cc 3033 if (check_for_unit_attention(h, cmd)) {
33659ebb 3034 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
0a9279cc
MM		 3035 return 0;
3036 }
3037
33659ebb
CH		 3038 /* Not SG_IO or similar? */
3039 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
1a614f50 3040 if (error_value != 0)
03bbfee5
MMOD		 3041 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3042 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3043 return error_value;
03bbfee5
MMOD		 3044 }
3045
3046 /* SG_IO or similar, copy sense data back */
3047 if (cmd->rq->sense) {
3048 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3049 cmd->rq->sense_len = cmd->err_info->SenseLen;
3050 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3051 cmd->rq->sense_len);
3052 } else
3053 cmd->rq->sense_len = 0;
3054
1a614f50 3055 return error_value;
03bbfee5
MMOD		 3056}
3057
7c832835 3058/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3059 * buffers for the completed job. Note that this function does not need
3060 * to hold the hba/queue lock.
7c832835
BH		 3061 */
3062static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3063 int timeout)
1da177e4 3064{
1da177e4 3065 int retry_cmd = 0;
198b7660
MMOD		 3066 struct request *rq = cmd->rq;
3067
3068 rq->errors = 0;
7c832835 3069
1da177e4 3070 if (timeout)
1a614f50 3071 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3072
d38ae168
MMOD		 3073 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3074 goto after_error_processing;
7c832835 3075
d38ae168 3076 switch (cmd->err_info->CommandStatus) {
d38ae168 3077 case CMD_TARGET_STATUS:
0a9279cc 3078 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3079 break;
3080 case CMD_DATA_UNDERRUN:
33659ebb 3081 if (cmd->rq->cmd_type == REQ_TYPE_FS) {
03bbfee5
MMOD		 3082 printk(KERN_WARNING "cciss: cmd %p has"
3083 " completed with data underrun "
3084 "reported\n", cmd);
c3a4d78c 3085 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3086 }
d38ae168
MMOD		 3087 break;
3088 case CMD_DATA_OVERRUN:
33659ebb 3089 if (cmd->rq->cmd_type == REQ_TYPE_FS)
03bbfee5
MMOD		 3090 printk(KERN_WARNING "cciss: cmd %p has"
3091 " completed with data overrun "
3092 "reported\n", cmd);
d38ae168
MMOD		 3093 break;
3094 case CMD_INVALID:
3095 printk(KERN_WARNING "cciss: cmd %p is "
3096 "reported invalid\n", cmd);
1a614f50
SC		 3097 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3098 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3099 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3100 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3101 break;
3102 case CMD_PROTOCOL_ERR:
3103 printk(KERN_WARNING "cciss: cmd %p has "
3104 "protocol error \n", cmd);
1a614f50
SC		 3105 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3106 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3107 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3108 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3109 break;
3110 case CMD_HARDWARE_ERR:
3111 printk(KERN_WARNING "cciss: cmd %p had "
3112 " hardware error\n", cmd);
1a614f50
SC		 3113 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3114 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3115 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3116 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3117 break;
3118 case CMD_CONNECTION_LOST:
3119 printk(KERN_WARNING "cciss: cmd %p had "
3120 "connection lost\n", cmd);
1a614f50
SC		 3121 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3122 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3123 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3124 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3125 break;
3126 case CMD_ABORTED:
3127 printk(KERN_WARNING "cciss: cmd %p was "
3128 "aborted\n", cmd);
1a614f50
SC		 3129 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3130 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3131 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3132 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3133 break;
3134 case CMD_ABORT_FAILED:
3135 printk(KERN_WARNING "cciss: cmd %p reports "
3136 "abort failed\n", cmd);
1a614f50
SC		 3137 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3138 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3139 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3140 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3141 break;
3142 case CMD_UNSOLICITED_ABORT:
3143 printk(KERN_WARNING "cciss%d: unsolicited "
3144 "abort %p\n", h->ctlr, cmd);
3145 if (cmd->retry_count < MAX_CMD_RETRIES) {
3146 retry_cmd = 1;
3147 printk(KERN_WARNING
3148 "cciss%d: retrying %p\n", h->ctlr, cmd);
3149 cmd->retry_count++;
3150 } else
3151 printk(KERN_WARNING
3152 "cciss%d: %p retried too "
3153 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3154 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3155 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3156 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3157 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3158 break;
3159 case CMD_TIMEOUT:
3160 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3161 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3162 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3163 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3164 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3165 break;
3166 default:
3167 printk(KERN_WARNING "cciss: cmd %p returned "
3168 "unknown status %x\n", cmd,
3169 cmd->err_info->CommandStatus);
1a614f50
SC		 3170 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3171 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3172 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3173 DID_PASSTHROUGH : DID_ERROR);
1da177e4 3174 }
d38ae168
MMOD		 3175
3176after_error_processing:
3177
1da177e4 3178 /* We need to return this command */
7c832835
BH		 3179 if (retry_cmd) {
3180 resend_cciss_cmd(h, cmd);
1da177e4 3181 return;
7c832835 3182 }
03bbfee5 3183 cmd->rq->completion_data = cmd;
a9925a06 3184 blk_complete_request(cmd->rq);
1da177e4
LT		 3185}
3186
0c2b3908
MM		 3187static inline u32 cciss_tag_contains_index(u32 tag)
3188{
5e216153 3189#define DIRECT_LOOKUP_BIT 0x10
0c2b3908
MM		 3190 return tag & DIRECT_LOOKUP_BIT;
3191}
3192
3193static inline u32 cciss_tag_to_index(u32 tag)
3194{
5e216153 3195#define DIRECT_LOOKUP_SHIFT 5
0c2b3908
MM		 3196 return tag >> DIRECT_LOOKUP_SHIFT;
3197}
3198
3199static inline u32 cciss_tag_discard_error_bits(u32 tag)
3200{
3201#define CCISS_ERROR_BITS 0x03
3202 return tag & ~CCISS_ERROR_BITS;
3203}
3204
3205static inline void cciss_mark_tag_indexed(u32 *tag)
3206{
3207 *tag |= DIRECT_LOOKUP_BIT;
3208}
3209
3210static inline void cciss_set_tag_index(u32 *tag, u32 index)
3211{
3212 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3213}
3214
7c832835
BH		 3215/*
3216 * Get a request and submit it to the controller.
1da177e4 3217 */
165125e1 3218static void do_cciss_request(struct request_queue *q)
1da177e4 3219{
7c832835 3220 ctlr_info_t *h = q->queuedata;
1da177e4 3221 CommandList_struct *c;
00988a35
MMOD		 3222 sector_t start_blk;
3223 int seg;
1da177e4
LT		 3224 struct request *creq;
3225 u64bit temp64;
5c07a311
DB		 3226 struct scatterlist *tmp_sg;
3227 SGDescriptor_struct *curr_sg;
1da177e4
LT		 3228 drive_info_struct *drv;
3229 int i, dir;
5c07a311
DB		 3230 int sg_index = 0;
3231 int chained = 0;
1da177e4
LT		 3232
3233 /* We call start_io here in case there is a command waiting on the
3234 * queue that has not been sent.
7c832835 3235 */
1da177e4
LT		 3236 if (blk_queue_plugged(q))
3237 goto startio;
3238
7c832835 3239 queue:
9934c8c0 3240 creq = blk_peek_request(q);
1da177e4
LT		 3241 if (!creq)
3242 goto startio;
3243
5c07a311 3244 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
1da177e4 3245
7c832835 3246 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3247 goto full;
3248
9934c8c0 3249 blk_start_request(creq);
1da177e4 3250
5c07a311 3251 tmp_sg = h->scatter_list[c->cmdindex];
1da177e4
LT		 3252 spin_unlock_irq(q->queue_lock);
3253
3254 c->cmd_type = CMD_RWREQ;
3255 c->rq = creq;
7c832835
BH		 3256
3257 /* fill in the request */
1da177e4 3258 drv = creq->rq_disk->private_data;
b028461d 3259 c->Header.ReplyQueue = 0; /* unused in simple mode */
33079b21
MM		 3260 /* got command from pool, so use the command block index instead */
3261 /* for direct lookups. */
3262 /* The first 2 bits are reserved for controller error reporting. */
0c2b3908
MM		 3263 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3264 cciss_mark_tag_indexed(&c->Header.Tag.lower);
39ccf9a6 3265 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
b028461d 3266 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3267 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
7c832835
BH		 3268 c->Request.Type.Attribute = ATTR_SIMPLE;
3269 c->Request.Type.Direction =
a52de245 3270 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
b028461d 3271 c->Request.Timeout = 0; /* Don't time out */
7c832835 3272 c->Request.CDB[0] =
00988a35 3273 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3274 start_blk = blk_rq_pos(creq);
1da177e4 3275#ifdef CCISS_DEBUG
83096ebf
TH		 3276 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3277 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3278#endif /* CCISS_DEBUG */
1da177e4 3279
5c07a311 3280 sg_init_table(tmp_sg, h->maxsgentries);
1da177e4
LT		 3281 seg = blk_rq_map_sg(q, creq, tmp_sg);
3282
7c832835 3283 /* get the DMA records for the setup */
1da177e4
LT		 3284 if (c->Request.Type.Direction == XFER_READ)
3285 dir = PCI_DMA_FROMDEVICE;
3286 else
3287 dir = PCI_DMA_TODEVICE;
3288
5c07a311
DB		 3289 curr_sg = c->SG;
3290 sg_index = 0;
3291 chained = 0;
3292
7c832835 3293 for (i = 0; i < seg; i++) {
5c07a311
DB		 3294 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3295 !chained && ((seg - i) > 1)) {
5c07a311 3296 /* Point to next chain block. */
dccc9b56 3297 curr_sg = h->cmd_sg_list[c->cmdindex];
5c07a311
DB		 3298 sg_index = 0;
3299 chained = 1;
3300 }
3301 curr_sg[sg_index].Len = tmp_sg[i].length;
45711f1a 3302 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
5c07a311
DB		 3303 tmp_sg[i].offset,
3304 tmp_sg[i].length, dir);
3305 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3306 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3307 curr_sg[sg_index].Ext = 0; /* we are not chaining */
5c07a311 3308 ++sg_index;
1da177e4 3309 }
d45033ef
SC		 3310 if (chained)
3311 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3312 (seg - (h->max_cmd_sgentries - 1)) *
3313 sizeof(SGDescriptor_struct));
5c07a311 3314
7c832835
BH		 3315 /* track how many SG entries we are using */
3316 if (seg > h->maxSG)
3317 h->maxSG = seg;
1da177e4
LT		 3318
3319#ifdef CCISS_DEBUG
5c07a311
DB		 3320 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3321 "chained[%d]\n",
3322 blk_rq_sectors(creq), seg, chained);
7c832835 3323#endif /* CCISS_DEBUG */
1da177e4 3324
5e216153
MM		 3325 c->Header.SGTotal = seg + chained;
3326 if (seg <= h->max_cmd_sgentries)
3327 c->Header.SGList = c->Header.SGTotal;
3328 else
5c07a311 3329 c->Header.SGList = h->max_cmd_sgentries;
5e216153 3330 set_performant_mode(h, c);
5c07a311 3331
33659ebb 3332 if (likely(creq->cmd_type == REQ_TYPE_FS)) {
03bbfee5
MMOD		 3333 if(h->cciss_read == CCISS_READ_10) {
3334 c->Request.CDB[1] = 0;
b028461d 3335 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
03bbfee5
MMOD		 3336 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3337 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3338 c->Request.CDB[5] = start_blk & 0xff;
b028461d 3339 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
83096ebf
TH		 3340 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3341 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3342 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3343 } else {
582539e5
RD		 3344 u32 upper32 = upper_32_bits(start_blk);
3345
03bbfee5
MMOD		 3346 c->Request.CDBLen = 16;
3347 c->Request.CDB[1]= 0;
b028461d 3348 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
582539e5
RD		 3349 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3350 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3351 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3352 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3353 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3354 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3355 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3356 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3357 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3358 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3359 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3360 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3361 }
33659ebb 3362 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
03bbfee5
MMOD		 3363 c->Request.CDBLen = creq->cmd_len;
3364 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3365 } else {
03bbfee5
MMOD		 3366 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3367 BUG();
00988a35 3368 }
1da177e4
LT		 3369
3370 spin_lock_irq(q->queue_lock);
3371
8a3173de 3372 addQ(&h->reqQ, c);
1da177e4 3373 h->Qdepth++;
7c832835
BH		 3374 if (h->Qdepth > h->maxQsinceinit)
3375 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3376
3377 goto queue;
00988a35 3378full:
1da177e4 3379 blk_stop_queue(q);
00988a35 3380startio:
1da177e4
LT		 3381 /* We will already have the driver lock here so not need
3382 * to lock it.
7c832835 3383 */
1da177e4
LT		 3384 start_io(h);
3385}
3386
3da8b713 3387static inline unsigned long get_next_completion(ctlr_info_t *h)
3388{
3da8b713 3389 return h->access.command_completed(h);
3da8b713 3390}
3391
3392static inline int interrupt_pending(ctlr_info_t *h)
3393{
3da8b713 3394 return h->access.intr_pending(h);
3da8b713 3395}
3396
3397static inline long interrupt_not_for_us(ctlr_info_t *h)
3398{
2cf3af1c
MM		 3399 return !(h->msi_vector || h->msix_vector) &&
3400 ((h->access.intr_pending(h) == 0) ||
3401 (h->interrupts_enabled == 0));
3da8b713 3402}
3403
0c2b3908
MM		 3404static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3405 u32 raw_tag)
1da177e4 3406{
0c2b3908
MM		 3407 if (unlikely(tag_index >= h->nr_cmds)) {
3408 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3409 return 1;
3410 }
3411 return 0;
3412}
3413
3414static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3415 u32 raw_tag)
3416{
3417 removeQ(c);
3418 if (likely(c->cmd_type == CMD_RWREQ))
3419 complete_command(h, c, 0);
3420 else if (c->cmd_type == CMD_IOCTL_PEND)
3421 complete(c->waiting);
3422#ifdef CONFIG_CISS_SCSI_TAPE
3423 else if (c->cmd_type == CMD_SCSI)
3424 complete_scsi_command(c, 0, raw_tag);
3425#endif
3426}
3427
29979a71
MM		 3428static inline u32 next_command(ctlr_info_t *h)
3429{
3430 u32 a;
3431
3432 if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
3433 return h->access.command_completed(h);
3434
3435 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
3436 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
3437 (h->reply_pool_head)++;
3438 h->commands_outstanding--;
3439 } else {
3440 a = FIFO_EMPTY;
3441 }
3442 /* Check for wraparound */
3443 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
3444 h->reply_pool_head = h->reply_pool;
3445 h->reply_pool_wraparound ^= 1;
3446 }
3447 return a;
3448}
3449
0c2b3908
MM		 3450/* process completion of an indexed ("direct lookup") command */
3451static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3452{
3453 u32 tag_index;
1da177e4 3454 CommandList_struct *c;
0c2b3908
MM		 3455
3456 tag_index = cciss_tag_to_index(raw_tag);
3457 if (bad_tag(h, tag_index, raw_tag))
5e216153 3458 return next_command(h);
0c2b3908
MM		 3459 c = h->cmd_pool + tag_index;
3460 finish_cmd(h, c, raw_tag);
5e216153 3461 return next_command(h);
0c2b3908
MM		 3462}
3463
3464/* process completion of a non-indexed command */
3465static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3466{
3467 u32 tag;
3468 CommandList_struct *c = NULL;
3469 struct hlist_node *tmp;
3470 __u32 busaddr_masked, tag_masked;
3471
3472 tag = cciss_tag_discard_error_bits(raw_tag);
3473 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3474 busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
3475 tag_masked = cciss_tag_discard_error_bits(tag);
3476 if (busaddr_masked == tag_masked) {
3477 finish_cmd(h, c, raw_tag);
5e216153 3478 return next_command(h);
0c2b3908
MM		 3479 }
3480 }
3481 bad_tag(h, h->nr_cmds + 1, raw_tag);
5e216153 3482 return next_command(h);
0c2b3908
MM		 3483}
3484
3485static irqreturn_t do_cciss_intx(int irq, void *dev_id)
3486{
3487 ctlr_info_t *h = dev_id;
1da177e4 3488 unsigned long flags;
0c2b3908 3489 u32 raw_tag;
1da177e4 3490
3da8b713 3491 if (interrupt_not_for_us(h))
1da177e4 3492 return IRQ_NONE;
1da177e4
LT		 3493 /*
3494 * If there are completed commands in the completion queue,
3495 * we had better do something about it.
3496 */
3497 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3498 while (interrupt_pending(h)) {
0c2b3908
MM		 3499 raw_tag = get_next_completion(h);
3500 while (raw_tag != FIFO_EMPTY) {
3501 if (cciss_tag_contains_index(raw_tag))
3502 raw_tag = process_indexed_cmd(h, raw_tag);
3503 else
3504 raw_tag = process_nonindexed_cmd(h, raw_tag);
3505 }
3506 }
33079b21 3507
0c2b3908
MM		 3508 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3509 return IRQ_HANDLED;
3510}
33079b21 3511
0c2b3908
MM		 3512/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3513 * check the interrupt pending register because it is not set.
3514 */
3515static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3516{
3517 ctlr_info_t *h = dev_id;
3518 unsigned long flags;
3519 u32 raw_tag;
8a3173de 3520
0c2b3908
MM		 3521 if (interrupt_not_for_us(h))
3522 return IRQ_NONE;
3523 /*
3524 * If there are completed commands in the completion queue,
3525 * we had better do something about it.
3526 */
3527 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3528 raw_tag = get_next_completion(h);
3529 while (raw_tag != FIFO_EMPTY) {
3530 if (cciss_tag_contains_index(raw_tag))
3531 raw_tag = process_indexed_cmd(h, raw_tag);
3532 else
3533 raw_tag = process_nonindexed_cmd(h, raw_tag);
1da177e4
LT		 3534 }
3535
1da177e4
LT		 3536 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3537 return IRQ_HANDLED;
3538}
7c832835 3539
b368c9dd
AP		 3540/**
3541 * add_to_scan_list() - add controller to rescan queue
3542 * @h: Pointer to the controller.
3543 *
3544 * Adds the controller to the rescan queue if not already on the queue.
3545 *
3546 * returns 1 if added to the queue, 0 if skipped (could be on the
3547 * queue already, or the controller could be initializing or shutting
3548 * down).
3549 **/
3550static int add_to_scan_list(struct ctlr_info *h)
3551{
3552 struct ctlr_info *test_h;
3553 int found = 0;
3554 int ret = 0;
3555
3556 if (h->busy_initializing)
3557 return 0;
3558
3559 if (!mutex_trylock(&h->busy_shutting_down))
3560 return 0;
3561
3562 mutex_lock(&scan_mutex);
3563 list_for_each_entry(test_h, &scan_q, scan_list) {
3564 if (test_h == h) {
3565 found = 1;
3566 break;
3567 }
3568 }
3569 if (!found && !h->busy_scanning) {
3570 INIT_COMPLETION(h->scan_wait);
3571 list_add_tail(&h->scan_list, &scan_q);
3572 ret = 1;
3573 }
3574 mutex_unlock(&scan_mutex);
3575 mutex_unlock(&h->busy_shutting_down);
3576
3577 return ret;
3578}
3579
3580/**
3581 * remove_from_scan_list() - remove controller from rescan queue
3582 * @h: Pointer to the controller.
3583 *
3584 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC		 3585 * the controller is currently conducting a rescan. The controller
3586 * can be in one of three states:
3587 * 1. Doesn't need a scan
3588 * 2. On the scan list, but not scanning yet (we remove it)
3589 * 3. Busy scanning (and not on the list). In this case we want to wait for
3590 * the scan to complete to make sure the scanning thread for this
3591 * controller is completely idle.
b368c9dd
AP		 3592 **/
3593static void remove_from_scan_list(struct ctlr_info *h)
3594{
3595 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP		 3596
3597 mutex_lock(&scan_mutex);
3598 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3599 if (test_h == h) { /* state 2. */
b368c9dd
AP		 3600 list_del(&h->scan_list);
3601 complete_all(&h->scan_wait);
3602 mutex_unlock(&scan_mutex);
3603 return;
3604 }
3605 }
fd8489cf
SC		 3606 if (h->busy_scanning) { /* state 3. */
3607 mutex_unlock(&scan_mutex);
b368c9dd 3608 wait_for_completion(&h->scan_wait);
fd8489cf
SC		 3609 } else { /* state 1, nothing to do. */
3610 mutex_unlock(&scan_mutex);
3611 }
b368c9dd
AP		 3612}
3613
3614/**
3615 * scan_thread() - kernel thread used to rescan controllers
3616 * @data: Ignored.
3617 *
3618 * A kernel thread used scan for drive topology changes on
3619 * controllers. The thread processes only one controller at a time
3620 * using a queue. Controllers are added to the queue using
3621 * add_to_scan_list() and removed from the queue either after done
3622 * processing or using remove_from_scan_list().
3623 *
3624 * returns 0.
3625 **/
0a9279cc
MM		 3626static int scan_thread(void *data)
3627{
b368c9dd 3628 struct ctlr_info *h;
0a9279cc 3629
b368c9dd
AP		 3630 while (1) {
3631 set_current_state(TASK_INTERRUPTIBLE);
3632 schedule();
0a9279cc
MM		 3633 if (kthread_should_stop())
3634 break;
b368c9dd
AP		 3635
3636 while (1) {
3637 mutex_lock(&scan_mutex);
3638 if (list_empty(&scan_q)) {
3639 mutex_unlock(&scan_mutex);
3640 break;
3641 }
3642
3643 h = list_entry(scan_q.next,
3644 struct ctlr_info,
3645 scan_list);
3646 list_del(&h->scan_list);
3647 h->busy_scanning = 1;
3648 mutex_unlock(&scan_mutex);
3649
d06dfbd2
SC		 3650 rebuild_lun_table(h, 0, 0);
3651 complete_all(&h->scan_wait);
3652 mutex_lock(&scan_mutex);
3653 h->busy_scanning = 0;
3654 mutex_unlock(&scan_mutex);
b368c9dd 3655 }
0a9279cc 3656 }
b368c9dd 3657
0a9279cc
MM		 3658 return 0;
3659}
3660
3661static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3662{
3663 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3664 return 0;
3665
3666 switch (c->err_info->SenseInfo[12]) {
3667 case STATE_CHANGED:
3668 printk(KERN_WARNING "cciss%d: a state change "
3669 "detected, command retried\n", h->ctlr);
3670 return 1;
3671 break;
3672 case LUN_FAILED:
3673 printk(KERN_WARNING "cciss%d: LUN failure "
3674 "detected, action required\n", h->ctlr);
3675 return 1;
3676 break;
3677 case REPORT_LUNS_CHANGED:
3678 printk(KERN_WARNING "cciss%d: report LUN data "
3679 "changed\n", h->ctlr);
da002184
SC		 3680 /*
3681 * Here, we could call add_to_scan_list and wake up the scan thread,
3682 * except that it's quite likely that we will get more than one
3683 * REPORT_LUNS_CHANGED condition in quick succession, which means
3684 * that those which occur after the first one will likely happen
3685 * *during* the scan_thread's rescan. And the rescan code is not
3686 * robust enough to restart in the middle, undoing what it has already
3687 * done, and it's not clear that it's even possible to do this, since
3688 * part of what it does is notify the block layer, which starts
3689 * doing it's own i/o to read partition tables and so on, and the
3690 * driver doesn't have visibility to know what might need undoing.
3691 * In any event, if possible, it is horribly complicated to get right
3692 * so we just don't do it for now.
3693 *
3694 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3695 */
0a9279cc
MM		 3696 return 1;
3697 break;
3698 case POWER_OR_RESET:
3699 printk(KERN_WARNING "cciss%d: a power on "
3700 "or device reset detected\n", h->ctlr);
3701 return 1;
3702 break;
3703 case UNIT_ATTENTION_CLEARED:
3704 printk(KERN_WARNING "cciss%d: unit attention "
3705 "cleared by another initiator\n", h->ctlr);
3706 return 1;
3707 break;
3708 default:
3709 printk(KERN_WARNING "cciss%d: unknown "
3710 "unit attention detected\n", h->ctlr);
3711 return 1;
3712 }
3713}
3714
7c832835 3715/*
d14c4ab5 3716 * We cannot read the structure directly, for portability we must use
1da177e4 3717 * the io functions.
7c832835 3718 * This is for debug only.
1da177e4 3719 */
7c832835 3720static void print_cfg_table(CfgTable_struct *tb)
1da177e4 3721{
ff5f58f0 3722#ifdef CCISS_DEBUG
1da177e4
LT		 3723 int i;
3724 char temp_name[17];
3725
3726 printk("Controller Configuration information\n");
3727 printk("------------------------------------\n");
7c832835 3728 for (i = 0; i < 4; i++)
1da177e4 3729 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3730 temp_name[4] = '\0';
3731 printk(" Signature = %s\n", temp_name);
1da177e4 3732 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3733 printk(" Transport methods supported = 0x%x\n",
3734 readl(&(tb->TransportSupport)));
3735 printk(" Transport methods active = 0x%x\n",
3736 readl(&(tb->TransportActive)));
3737 printk(" Requested transport Method = 0x%x\n",
3738 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3739 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3740 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3741 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3742 readl(&(tb->HostWrite.CoalIntCount)));
3743 printk(" Max outstanding commands = 0x%d\n",
3744 readl(&(tb->CmdsOutMax)));
3745 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3746 for (i = 0; i < 16; i++)
1da177e4
LT		 3747 temp_name[i] = readb(&(tb->ServerName[i]));
3748 temp_name[16] = '\0';
3749 printk(" Server Name = %s\n", temp_name);
7c832835 3750 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
7c832835 3751#endif /* CCISS_DEBUG */
ff5f58f0 3752}
1da177e4 3753
7c832835 3754static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3755{
3756 int i, offset, mem_type, bar_type;
7c832835 3757 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3758 return 0;
3759 offset = 0;
7c832835
BH		 3760 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3761 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3762 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3763 offset += 4;
3764 else {
3765 mem_type = pci_resource_flags(pdev, i) &
7c832835 3766 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3767 switch (mem_type) {
7c832835
BH		 3768 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3769 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3770 offset += 4; /* 32 bit */
3771 break;
3772 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3773 offset += 8;
3774 break;
3775 default: /* reserved in PCI 2.2 */
3776 printk(KERN_WARNING
3777 "Base address is invalid\n");
3778 return -1;
1da177e4
LT		 3779 break;
3780 }
3781 }
7c832835
BH		 3782 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3783 return i + 1;
1da177e4
LT		 3784 }
3785 return -1;
3786}
3787
5e216153
MM		 3788/* Fill in bucket_map[], given nsgs (the max number of
3789 * scatter gather elements supported) and bucket[],
3790 * which is an array of 8 integers. The bucket[] array
3791 * contains 8 different DMA transfer sizes (in 16
3792 * byte increments) which the controller uses to fetch
3793 * commands. This function fills in bucket_map[], which
3794 * maps a given number of scatter gather elements to one of
3795 * the 8 DMA transfer sizes. The point of it is to allow the
3796 * controller to only do as much DMA as needed to fetch the
3797 * command, with the DMA transfer size encoded in the lower
3798 * bits of the command address.
3799 */
3800static void calc_bucket_map(int bucket[], int num_buckets,
3801 int nsgs, int *bucket_map)
3802{
3803 int i, j, b, size;
3804
3805 /* even a command with 0 SGs requires 4 blocks */
3806#define MINIMUM_TRANSFER_BLOCKS 4
3807#define NUM_BUCKETS 8
3808 /* Note, bucket_map must have nsgs+1 entries. */
3809 for (i = 0; i <= nsgs; i++) {
3810 /* Compute size of a command with i SG entries */
3811 size = i + MINIMUM_TRANSFER_BLOCKS;
3812 b = num_buckets; /* Assume the biggest bucket */
3813 /* Find the bucket that is just big enough */
3814 for (j = 0; j < 8; j++) {
3815 if (bucket[j] >= size) {
3816 b = j;
3817 break;
3818 }
3819 }
3820 /* for a command with i SG entries, use bucket b. */
3821 bucket_map[i] = b;
3822 }
3823}
3824
0f8a6a1e
SC		 3825static void __devinit cciss_wait_for_mode_change_ack(ctlr_info_t *h)
3826{
3827 int i;
3828
3829 /* under certain very rare conditions, this can take awhile.
3830 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3831 * as we enter this code.) */
3832 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3833 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3834 break;
3835 msleep(10);
3836 }
3837}
3838
b9933135
SC		 3839static __devinit void cciss_enter_performant_mode(ctlr_info_t *h)
3840{
3841 /* This is a bit complicated. There are 8 registers on
3842 * the controller which we write to to tell it 8 different
3843 * sizes of commands which there may be. It's a way of
3844 * reducing the DMA done to fetch each command. Encoded into
3845 * each command's tag are 3 bits which communicate to the controller
3846 * which of the eight sizes that command fits within. The size of
3847 * each command depends on how many scatter gather entries there are.
3848 * Each SG entry requires 16 bytes. The eight registers are programmed
3849 * with the number of 16-byte blocks a command of that size requires.
3850 * The smallest command possible requires 5 such 16 byte blocks.
3851 * the largest command possible requires MAXSGENTRIES + 4 16-byte
3852 * blocks. Note, this only extends to the SG entries contained
3853 * within the command block, and does not extend to chained blocks
3854 * of SG elements. bft[] contains the eight values we write to
3855 * the registers. They are not evenly distributed, but have more
3856 * sizes for small commands, and fewer sizes for larger commands.
3857 */
5e216153 3858 __u32 trans_offset;
b9933135 3859 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
5e216153
MM		 3860 /*
3861 * 5 = 1 s/g entry or 4k
3862 * 6 = 2 s/g entry or 8k
3863 * 8 = 4 s/g entry or 16k
3864 * 10 = 6 s/g entry or 24k
3865 */
5e216153 3866 unsigned long register_value;
5e216153
MM		 3867 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
3868
5e216153
MM		 3869 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3870
3871 /* Controller spec: zero out this buffer. */
3872 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
3873 h->reply_pool_head = h->reply_pool;
3874
3875 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3876 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
3877 h->blockFetchTable);
3878 writel(bft[0], &h->transtable->BlockFetch0);
3879 writel(bft[1], &h->transtable->BlockFetch1);
3880 writel(bft[2], &h->transtable->BlockFetch2);
3881 writel(bft[3], &h->transtable->BlockFetch3);
3882 writel(bft[4], &h->transtable->BlockFetch4);
3883 writel(bft[5], &h->transtable->BlockFetch5);
3884 writel(bft[6], &h->transtable->BlockFetch6);
3885 writel(bft[7], &h->transtable->BlockFetch7);
3886
3887 /* size of controller ring buffer */
3888 writel(h->max_commands, &h->transtable->RepQSize);
3889 writel(1, &h->transtable->RepQCount);
3890 writel(0, &h->transtable->RepQCtrAddrLow32);
3891 writel(0, &h->transtable->RepQCtrAddrHigh32);
3892 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3893 writel(0, &h->transtable->RepQAddr0High32);
3894 writel(CFGTBL_Trans_Performant,
3895 &(h->cfgtable->HostWrite.TransportRequest));
3896
5e216153 3897 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
0f8a6a1e 3898 cciss_wait_for_mode_change_ack(h);
5e216153 3899 register_value = readl(&(h->cfgtable->TransportActive));
b9933135 3900 if (!(register_value & CFGTBL_Trans_Performant))
5e216153
MM		 3901 printk(KERN_WARNING "cciss: unable to get board into"
3902 " performant mode\n");
b9933135
SC		 3903}
3904
3905static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
3906{
3907 __u32 trans_support;
3908
3909 dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n");
3910 /* Attempt to put controller into performant mode if supported */
3911 /* Does board support performant mode? */
3912 trans_support = readl(&(h->cfgtable->TransportSupport));
3913 if (!(trans_support & PERFORMANT_MODE))
3914 return;
3915
3916 printk(KERN_WARNING "cciss%d: Placing controller into "
3917 "performant mode\n", h->ctlr);
3918 /* Performant mode demands commands on a 32 byte boundary
3919 * pci_alloc_consistent aligns on page boundarys already.
3920 * Just need to check if divisible by 32
3921 */
3922 if ((sizeof(CommandList_struct) % 32) != 0) {
3923 printk(KERN_WARNING "%s %d %s\n",
3924 "cciss info: command size[",
3925 (int)sizeof(CommandList_struct),
3926 "] not divisible by 32, no performant mode..\n");
5e216153
MM		 3927 return;
3928 }
3929
b9933135
SC		 3930 /* Performant mode ring buffer and supporting data structures */
3931 h->reply_pool = (__u64 *)pci_alloc_consistent(
3932 h->pdev, h->max_commands * sizeof(__u64),
3933 &(h->reply_pool_dhandle));
3934
3935 /* Need a block fetch table for performant mode */
3936 h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
3937 sizeof(__u32)), GFP_KERNEL);
3938
3939 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
3940 goto clean_up;
3941
3942 cciss_enter_performant_mode(h);
3943
5e216153
MM		 3944 /* Change the access methods to the performant access methods */
3945 h->access = SA5_performant_access;
b9933135 3946 h->transMethod = CFGTBL_Trans_Performant;
5e216153
MM		 3947
3948 return;
3949clean_up:
3950 kfree(h->blockFetchTable);
3951 if (h->reply_pool)
3952 pci_free_consistent(h->pdev,
3953 h->max_commands * sizeof(__u64),
3954 h->reply_pool,
3955 h->reply_pool_dhandle);
3956 return;
3957
3958} /* cciss_put_controller_into_performant_mode */
3959
fb86a35b
MM		 3960/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3961 * controllers that are capable. If not, we use IO-APIC mode.
3962 */
3963
dac5488a 3964static void __devinit cciss_interrupt_mode(ctlr_info_t *c)
fb86a35b
MM		 3965{
3966#ifdef CONFIG_PCI_MSI
7c832835
BH		 3967 int err;
3968 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3969 {0, 2}, {0, 3}
3970 };
fb86a35b
MM		 3971
3972 /* Some boards advertise MSI but don't really support it */
dac5488a
SC		 3973 if ((c->board_id == 0x40700E11) || (c->board_id == 0x40800E11) ||
3974 (c->board_id == 0x40820E11) || (c->board_id == 0x40830E11))
fb86a35b
MM		 3975 goto default_int_mode;
3976
292e50dd
SC		 3977 if (pci_find_capability(c->pdev, PCI_CAP_ID_MSIX)) {
3978 err = pci_enable_msix(c->pdev, cciss_msix_entries, 4);
7c832835
BH		 3979 if (!err) {
3980 c->intr[0] = cciss_msix_entries[0].vector;
3981 c->intr[1] = cciss_msix_entries[1].vector;
3982 c->intr[2] = cciss_msix_entries[2].vector;
3983 c->intr[3] = cciss_msix_entries[3].vector;
3984 c->msix_vector = 1;
3985 return;
3986 }
3987 if (err > 0) {
3988 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3989 "available\n", err);
1ecb9c0f 3990 goto default_int_mode;
7c832835
BH		 3991 } else {
3992 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3993 err);
1ecb9c0f 3994 goto default_int_mode;
7c832835
BH		 3995 }
3996 }
292e50dd
SC		 3997 if (pci_find_capability(c->pdev, PCI_CAP_ID_MSI)) {
3998 if (!pci_enable_msi(c->pdev)) {
7c832835 3999 c->msi_vector = 1;
7c832835
BH		 4000 } else {
4001 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 4002 }
4003 }
1ecb9c0f 4004default_int_mode:
7c832835 4005#endif /* CONFIG_PCI_MSI */
fb86a35b 4006 /* if we get here we're going to use the default interrupt mode */
292e50dd 4007 c->intr[PERF_MODE_INT] = c->pdev->irq;
fb86a35b
MM		 4008 return;
4009}
4010
6539fa9b 4011static int __devinit cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
1da177e4 4012{
6539fa9b
SC		 4013 int i;
4014 u32 subsystem_vendor_id, subsystem_device_id;
2ec24ff1 4015
6539fa9b
SC		 4016 subsystem_vendor_id = pdev->subsystem_vendor;
4017 subsystem_device_id = pdev->subsystem_device;
4018 *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
4019 subsystem_vendor_id;
2ec24ff1
SC		 4020
4021 for (i = 0; i < ARRAY_SIZE(products); i++) {
4022 /* Stand aside for hpsa driver on request */
4023 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
4024 return -ENODEV;
6539fa9b
SC		 4025 if (*board_id == products[i].board_id)
4026 return i;
2ec24ff1 4027 }
6539fa9b
SC		 4028 dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n",
4029 *board_id);
4030 return -ENODEV;
4031}
4032
dd9c426e
SC		 4033static inline bool cciss_board_disabled(ctlr_info_t *h)
4034{
4035 u16 command;
4036
4037 (void) pci_read_config_word(h->pdev, PCI_COMMAND, &command);
4038 return ((command & PCI_COMMAND_MEMORY) == 0);
4039}
4040
d474830d
SC		 4041static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
4042 unsigned long *memory_bar)
4043{
4044 int i;
4045
4046 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
4047 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
4048 /* addressing mode bits already removed */
4049 *memory_bar = pci_resource_start(pdev, i);
4050 dev_dbg(&pdev->dev, "memory BAR = %lx\n",
4051 *memory_bar);
4052 return 0;
4053 }
4054 dev_warn(&pdev->dev, "no memory BAR found\n");
4055 return -ENODEV;
4056}
4057
e99ba136
SC		 4058static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h)
4059{
4060 int i;
4061 u32 scratchpad;
4062
4063 for (i = 0; i < CCISS_BOARD_READY_ITERATIONS; i++) {
4064 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
4065 if (scratchpad == CCISS_FIRMWARE_READY)
4066 return 0;
4067 msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS);
4068 }
4069 dev_warn(&h->pdev->dev, "board not ready, timed out.\n");
4070 return -ENODEV;
4071}
4072
8e93bf6d
SC		 4073static int __devinit cciss_find_cfg_addrs(struct pci_dev *pdev,
4074 void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
4075 u64 *cfg_offset)
4076{
4077 *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
4078 *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
4079 *cfg_base_addr &= (u32) 0x0000ffff;
4080 *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
4081 if (*cfg_base_addr_index == -1) {
4082 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index, "
4083 "*cfg_base_addr = 0x%08x\n", *cfg_base_addr);
4084 return -ENODEV;
4085 }
4086 return 0;
4087}
4088
4809d098
SC		 4089static int __devinit cciss_find_cfgtables(ctlr_info_t *h)
4090{
4091 u64 cfg_offset;
4092 u32 cfg_base_addr;
4093 u64 cfg_base_addr_index;
4094 u32 trans_offset;
8e93bf6d 4095 int rc;
4809d098 4096
8e93bf6d
SC		 4097 rc = cciss_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
4098 &cfg_base_addr_index, &cfg_offset);
4099 if (rc)
4100 return rc;
4809d098 4101 h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
8e93bf6d 4102 cfg_base_addr_index) + cfg_offset, sizeof(h->cfgtable));
4809d098
SC		 4103 if (!h->cfgtable)
4104 return -ENOMEM;
4105 /* Find performant mode table. */
8e93bf6d 4106 trans_offset = readl(&h->cfgtable->TransMethodOffset);
4809d098
SC		 4107 h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
4108 cfg_base_addr_index)+cfg_offset+trans_offset,
4109 sizeof(*h->transtable));
4110 if (!h->transtable)
4111 return -ENOMEM;
4112 return 0;
4113}
4114
afadbf4b
SC		 4115/* Interrogate the hardware for some limits:
4116 * max commands, max SG elements without chaining, and with chaining,
4117 * SG chain block size, etc.
4118 */
4119static void __devinit cciss_find_board_params(ctlr_info_t *h)
4120{
4121 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
4122 h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
4123 h->maxsgentries = readl(&(h->cfgtable->MaxSGElements));
4124 /*
4125 * Limit in-command s/g elements to 32 save dma'able memory.
4126 * Howvever spec says if 0, use 31
4127 */
4128 h->max_cmd_sgentries = 31;
4129 if (h->maxsgentries > 512) {
4130 h->max_cmd_sgentries = 32;
4131 h->chainsize = h->maxsgentries - h->max_cmd_sgentries + 1;
4132 h->maxsgentries--; /* save one for chain pointer */
4133 } else {
4134 h->maxsgentries = 31; /* default to traditional values */
4135 h->chainsize = 0;
4136 }
4137}
4138
501b92cd
SC		 4139static inline bool CISS_signature_present(ctlr_info_t *h)
4140{
4141 if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
4142 (readb(&h->cfgtable->Signature[1]) != 'I') ||
4143 (readb(&h->cfgtable->Signature[2]) != 'S') ||
4144 (readb(&h->cfgtable->Signature[3]) != 'S')) {
4145 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
4146 return false;
4147 }
4148 return true;
4149}
4150
322e304c
SC		 4151/* Need to enable prefetch in the SCSI core for 6400 in x86 */
4152static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h)
4153{
4154#ifdef CONFIG_X86
4155 u32 prefetch;
4156
4157 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
4158 prefetch |= 0x100;
4159 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
4160#endif
4161}
4162
bfd63ee5
SC		 4163/* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result
4164 * in a prefetch beyond physical memory.
4165 */
4166static inline void cciss_p600_dma_prefetch_quirk(ctlr_info_t *h)
4167{
4168 u32 dma_prefetch;
4169 __u32 dma_refetch;
4170
4171 if (h->board_id != 0x3225103C)
4172 return;
4173 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
4174 dma_prefetch |= 0x8000;
4175 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
4176 pci_read_config_dword(h->pdev, PCI_COMMAND_PARITY, &dma_refetch);
4177 dma_refetch |= 0x1;
4178 pci_write_config_dword(h->pdev, PCI_COMMAND_PARITY, dma_refetch);
4179}
4180
6539fa9b
SC		 4181static int __devinit cciss_pci_init(ctlr_info_t *c)
4182{
4809d098 4183 int prod_index, err;
6539fa9b
SC		 4184
4185 prod_index = cciss_lookup_board_id(c->pdev, &c->board_id);
4186 if (prod_index < 0)
2ec24ff1 4187 return -ENODEV;
6539fa9b
SC		 4188 c->product_name = products[prod_index].product_name;
4189 c->access = *(products[prod_index].access);
1da177e4 4190
dd9c426e 4191 if (cciss_board_disabled(c)) {
7c832835
BH		 4192 printk(KERN_WARNING
4193 "cciss: controller appears to be disabled\n");
c33ac89b 4194 return -ENODEV;
1da177e4 4195 }
292e50dd 4196 err = pci_enable_device(c->pdev);
7c832835 4197 if (err) {
1da177e4 4198 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 4199 return err;
1da177e4 4200 }
1da177e4 4201
292e50dd 4202 err = pci_request_regions(c->pdev, "cciss");
4e570309
BH		 4203 if (err) {
4204 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 4205 "aborting\n");
872225ca 4206 return err;
4e570309
BH		 4207 }
4208
1da177e4 4209#ifdef CCISS_DEBUG
292e50dd
SC		 4210 printk(KERN_INFO "command = %x\n", command);
4211 printk(KERN_INFO "irq = %x\n", c->pdev->irq);
6539fa9b 4212 printk(KERN_INFO "board_id = %x\n", c->board_id);
7c832835 4213#endif /* CCISS_DEBUG */
1da177e4 4214
fb86a35b
MM		 4215/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
4216 * else we use the IO-APIC interrupt assigned to us by system ROM.
4217 */
dac5488a 4218 cciss_interrupt_mode(c);
d474830d
SC		 4219 err = cciss_pci_find_memory_BAR(c->pdev, &c->paddr);
4220 if (err)
e1438581 4221 goto err_out_free_res;
a5b92873 4222 c->vaddr = remap_pci_mem(c->paddr, 0x250);
da550321
SC		 4223 if (!c->vaddr) {
4224 err = -ENOMEM;
4225 goto err_out_free_res;
4226 }
e99ba136
SC		 4227 err = cciss_wait_for_board_ready(c);
4228 if (err)
4e570309 4229 goto err_out_free_res;
4809d098
SC		 4230 err = cciss_find_cfgtables(c);
4231 if (err)
4e570309 4232 goto err_out_free_res;
6539fa9b 4233 print_cfg_table(c->cfgtable);
afadbf4b 4234 cciss_find_board_params(c);
1da177e4 4235
501b92cd 4236 if (!CISS_signature_present(c)) {
c33ac89b 4237 err = -ENODEV;
4e570309 4238 goto err_out_free_res;
1da177e4 4239 }
322e304c 4240 cciss_enable_scsi_prefetch(c);
bfd63ee5 4241 cciss_p600_dma_prefetch_quirk(c);
b14aa6dc 4242 cciss_put_controller_into_performant_mode(c);
1da177e4
LT		 4243 return 0;
4244
5faad620 4245err_out_free_res:
872225ca
MM		 4246 /*
4247 * Deliberately omit pci_disable_device(): it does something nasty to
4248 * Smart Array controllers that pci_enable_device does not undo
4249 */
da550321
SC		 4250 if (c->transtable)
4251 iounmap(c->transtable);
4252 if (c->cfgtable)
4253 iounmap(c->cfgtable);
4254 if (c->vaddr)
4255 iounmap(c->vaddr);
292e50dd 4256 pci_release_regions(c->pdev);
c33ac89b 4257 return err;
1da177e4
LT		 4258}
4259
6ae5ce8e
MM		 4260/* Function to find the first free pointer into our hba[] array
4261 * Returns -1 if no free entries are left.
7c832835 4262 */
1da177e4
LT		 4263static int alloc_cciss_hba(void)
4264{
799202cb 4265 int i;
1da177e4 4266
7c832835 4267 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 4268 if (!hba[i]) {
4269 ctlr_info_t *p;
f2912a12 4270
06ff37ff 4271 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 4272 if (!p)
4273 goto Enomem;
1da177e4
LT		 4274 hba[i] = p;
4275 return i;
4276 }
4277 }
4278 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 4279 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 4280 return -1;
4281Enomem:
1da177e4 4282 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 4283 return -1;
4284}
4285
2c935593 4286static void free_hba(int n)
1da177e4 4287{
2c935593
SC		 4288 ctlr_info_t *h = hba[n];
4289 int i;
1da177e4 4290
2c935593
SC		 4291 hba[n] = NULL;
4292 for (i = 0; i < h->highest_lun + 1; i++)
4293 if (h->gendisk[i] != NULL)
4294 put_disk(h->gendisk[i]);
4295 kfree(h);
1da177e4
LT		 4296}
4297
82eb03cf
CC		 4298/* Send a message CDB to the firmware. */
4299static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
4300{
4301 typedef struct {
4302 CommandListHeader_struct CommandHeader;
4303 RequestBlock_struct Request;
4304 ErrDescriptor_struct ErrorDescriptor;
4305 } Command;
4306 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4307 Command *cmd;
4308 dma_addr_t paddr64;
4309 uint32_t paddr32, tag;
4310 void __iomem *vaddr;
4311 int i, err;
4312
4313 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4314 if (vaddr == NULL)
4315 return -ENOMEM;
4316
4317 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4318 CCISS commands, so they must be allocated from the lower 4GiB of
4319 memory. */
e930438c 4320 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 4321 if (err) {
4322 iounmap(vaddr);
4323 return -ENOMEM;
4324 }
4325
4326 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4327 if (cmd == NULL) {
4328 iounmap(vaddr);
4329 return -ENOMEM;
4330 }
4331
4332 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4333 although there's no guarantee, we assume that the address is at
4334 least 4-byte aligned (most likely, it's page-aligned). */
4335 paddr32 = paddr64;
4336
4337 cmd->CommandHeader.ReplyQueue = 0;
4338 cmd->CommandHeader.SGList = 0;
4339 cmd->CommandHeader.SGTotal = 0;
4340 cmd->CommandHeader.Tag.lower = paddr32;
4341 cmd->CommandHeader.Tag.upper = 0;
4342 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4343
4344 cmd->Request.CDBLen = 16;
4345 cmd->Request.Type.Type = TYPE_MSG;
4346 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4347 cmd->Request.Type.Direction = XFER_NONE;
4348 cmd->Request.Timeout = 0; /* Don't time out */
4349 cmd->Request.CDB[0] = opcode;
4350 cmd->Request.CDB[1] = type;
4351 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4352
4353 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4354 cmd->ErrorDescriptor.Addr.upper = 0;
4355 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4356
4357 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4358
4359 for (i = 0; i < 10; i++) {
4360 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4361 if ((tag & ~3) == paddr32)
4362 break;
4363 schedule_timeout_uninterruptible(HZ);
4364 }
4365
4366 iounmap(vaddr);
4367
4368 /* we leak the DMA buffer here ... no choice since the controller could
4369 still complete the command. */
4370 if (i == 10) {
4371 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4372 opcode, type);
4373 return -ETIMEDOUT;
4374 }
4375
4376 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4377
4378 if (tag & 2) {
4379 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4380 opcode, type);
4381 return -EIO;
4382 }
4383
4384 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4385 opcode, type);
4386 return 0;
4387}
4388
4389#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4390#define cciss_noop(p) cciss_message(p, 3, 0)
4391
4392static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4393{
4394/* the #defines are stolen from drivers/pci/msi.h. */
4395#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4396#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4397
4398 int pos;
4399 u16 control = 0;
4400
4401 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4402 if (pos) {
4403 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4404 if (control & PCI_MSI_FLAGS_ENABLE) {
4405 printk(KERN_INFO "cciss: resetting MSI\n");
4406 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4407 }
4408 }
4409
4410 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4411 if (pos) {
4412 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4413 if (control & PCI_MSIX_FLAGS_ENABLE) {
4414 printk(KERN_INFO "cciss: resetting MSI-X\n");
4415 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4416 }
4417 }
4418
4419 return 0;
4420}
4421
a6528d01
SC		 4422static int cciss_controller_hard_reset(struct pci_dev *pdev,
4423 void * __iomem vaddr, bool use_doorbell)
82eb03cf 4424{
a6528d01
SC		 4425 u16 pmcsr;
4426 int pos;
82eb03cf 4427
a6528d01
SC		 4428 if (use_doorbell) {
4429 /* For everything after the P600, the PCI power state method
4430 * of resetting the controller doesn't work, so we have this
4431 * other way using the doorbell register.
4432 */
4433 dev_info(&pdev->dev, "using doorbell to reset controller\n");
4434 writel(DOORBELL_CTLR_RESET, vaddr + SA5_DOORBELL);
4435 msleep(1000);
4436 } else { /* Try to do it the PCI power state way */
4437
4438 /* Quoting from the Open CISS Specification: "The Power
4439 * Management Control/Status Register (CSR) controls the power
4440 * state of the device. The normal operating state is D0,
4441 * CSR=00h. The software off state is D3, CSR=03h. To reset
4442 * the controller, place the interface device in D3 then to D0,
4443 * this causes a secondary PCI reset which will reset the
4444 * controller." */
4445
4446 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4447 if (pos == 0) {
4448 dev_err(&pdev->dev,
4449 "cciss_controller_hard_reset: "
4450 "PCI PM not supported\n");
4451 return -ENODEV;
4452 }
4453 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
4454 /* enter the D3hot power management state */
4455 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4456 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4457 pmcsr |= PCI_D3hot;
4458 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
82eb03cf 4459
a6528d01 4460 msleep(500);
82eb03cf 4461
a6528d01
SC		 4462 /* enter the D0 power management state */
4463 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4464 pmcsr |= PCI_D0;
4465 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
82eb03cf 4466
a6528d01
SC		 4467 msleep(500);
4468 }
4469 return 0;
4470}
4471
4472/* This does a hard reset of the controller using PCI power management
4473 * states or using the doorbell register. */
4474static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
4475{
4476 u16 saved_config_space[32];
4477 u64 cfg_offset;
4478 u32 cfg_base_addr;
4479 u64 cfg_base_addr_index;
4480 void __iomem *vaddr;
4481 unsigned long paddr;
4482 u32 misc_fw_support, active_transport;
4483 int rc, i;
4484 CfgTable_struct __iomem *cfgtable;
4485 bool use_doorbell;
4486
4487 /* For controllers as old a the p600, this is very nearly
4488 * the same thing as
4489 *
4490 * pci_save_state(pci_dev);
4491 * pci_set_power_state(pci_dev, PCI_D3hot);
4492 * pci_set_power_state(pci_dev, PCI_D0);
4493 * pci_restore_state(pci_dev);
4494 *
4495 * but we can't use these nice canned kernel routines on
4496 * kexec, because they also check the MSI/MSI-X state in PCI
4497 * configuration space and do the wrong thing when it is
4498 * set/cleared. Also, the pci_save/restore_state functions
4499 * violate the ordering requirements for restoring the
4500 * configuration space from the CCISS document (see the
4501 * comment below). So we roll our own ....
4502 *
4503 * For controllers newer than the P600, the pci power state
4504 * method of resetting doesn't work so we have another way
4505 * using the doorbell register.
4506 */
82eb03cf
CC		 4507
4508 for (i = 0; i < 32; i++)
4509 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4510
a6528d01
SC		 4511 /* find the first memory BAR, so we can find the cfg table */
4512 rc = cciss_pci_find_memory_BAR(pdev, &paddr);
4513 if (rc)
4514 return rc;
4515 vaddr = remap_pci_mem(paddr, 0x250);
4516 if (!vaddr)
4517 return -ENOMEM;
82eb03cf 4518
a6528d01
SC		 4519 /* find cfgtable in order to check if reset via doorbell is supported */
4520 rc = cciss_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
4521 &cfg_base_addr_index, &cfg_offset);
4522 if (rc)
4523 goto unmap_vaddr;
4524 cfgtable = remap_pci_mem(pci_resource_start(pdev,
4525 cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
4526 if (!cfgtable) {
4527 rc = -ENOMEM;
4528 goto unmap_vaddr;
4529 }
82eb03cf 4530
a6528d01
SC		 4531 /* If reset via doorbell register is supported, use that. */
4532 misc_fw_support = readl(&cfgtable->misc_fw_support);
4533 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
82eb03cf 4534
a6528d01
SC		 4535 rc = cciss_controller_hard_reset(pdev, vaddr, use_doorbell);
4536 if (rc)
4537 goto unmap_cfgtable;
82eb03cf
CC		 4538
4539 /* Restore the PCI configuration space. The Open CISS
4540 * Specification says, "Restore the PCI Configuration
4541 * Registers, offsets 00h through 60h. It is important to
4542 * restore the command register, 16-bits at offset 04h,
4543 * last. Do not restore the configuration status register,
a6528d01
SC		 4544 * 16-bits at offset 06h." Note that the offset is 2*i.
4545 */
82eb03cf
CC		 4546 for (i = 0; i < 32; i++) {
4547 if (i == 2 || i == 3)
4548 continue;
4549 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4550 }
4551 wmb();
4552 pci_write_config_word(pdev, 4, saved_config_space[2]);
4553
a6528d01
SC		 4554 /* Some devices (notably the HP Smart Array 5i Controller)
4555 need a little pause here */
4556 msleep(CCISS_POST_RESET_PAUSE_MSECS);
4557
4558 /* Controller should be in simple mode at this point. If it's not,
4559 * It means we're on one of those controllers which doesn't support
4560 * the doorbell reset method and on which the PCI power management reset
4561 * method doesn't work (P800, for example.)
4562 * In those cases, don't try to proceed, as it generally doesn't work.
4563 */
4564 active_transport = readl(&cfgtable->TransportActive);
4565 if (active_transport & PERFORMANT_MODE) {
4566 dev_warn(&pdev->dev, "Unable to successfully reset controller,"
4567 " Ignoring controller.\n");
4568 rc = -ENODEV;
4569 }
4570
4571unmap_cfgtable:
4572 iounmap(cfgtable);
4573
4574unmap_vaddr:
4575 iounmap(vaddr);
4576 return rc;
82eb03cf
CC		 4577}
4578
83123cb1
SC		 4579static __devinit int cciss_init_reset_devices(struct pci_dev *pdev)
4580{
a6528d01 4581 int rc, i;
83123cb1
SC		 4582
4583 if (!reset_devices)
4584 return 0;
4585
a6528d01
SC		 4586 /* Reset the controller with a PCI power-cycle or via doorbell */
4587 rc = cciss_kdump_hard_reset_controller(pdev);
83123cb1 4588
a6528d01
SC		 4589 /* -ENOTSUPP here means we cannot reset the controller
4590 * but it's already (and still) up and running in
4591 * "performant mode".
4592 */
4593 if (rc == -ENOTSUPP)
4594 return 0; /* just try to do the kdump anyhow. */
4595 if (rc)
4596 return -ENODEV;
4597 if (cciss_reset_msi(pdev))
4598 return -ENODEV;
83123cb1
SC		 4599
4600 /* Now try to get the controller to respond to a no-op */
4601 for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) {
4602 if (cciss_noop(pdev) == 0)
4603 break;
4604 else
4605 dev_warn(&pdev->dev, "no-op failed%s\n",
4606 (i < CCISS_POST_RESET_NOOP_RETRIES - 1 ?
4607 "; re-trying" : ""));
4608 msleep(CCISS_POST_RESET_NOOP_INTERVAL_MSECS);
4609 }
4610 return 0;
4611}
4612
1da177e4
LT		 4613/*
4614 * This is it. Find all the controllers and register them. I really hate
4615 * stealing all these major device numbers.
4616 * returns the number of block devices registered.
4617 */
4618static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4619 const struct pci_device_id *ent)
1da177e4 4620{
1da177e4 4621 int i;
799202cb 4622 int j = 0;
5c07a311 4623 int k = 0;
1da177e4 4624 int rc;
22bece00 4625 int dac, return_code;
212a5026 4626 InquiryData_struct *inq_buff;
1da177e4 4627
83123cb1
SC		 4628 rc = cciss_init_reset_devices(pdev);
4629 if (rc)
4630 return rc;
1da177e4 4631 i = alloc_cciss_hba();
7c832835 4632 if (i < 0)
e2019b58 4633 return -1;
292e50dd
SC		 4634
4635 hba[i]->pdev = pdev;
1f8ef380 4636 hba[i]->busy_initializing = 1;
8a3173de
JA		 4637 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4638 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4639 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4640
292e50dd 4641 if (cciss_pci_init(hba[i]) != 0)
2cfa948c 4642 goto clean_no_release_regions;
1da177e4
LT		 4643
4644 sprintf(hba[i]->devname, "cciss%d", i);
4645 hba[i]->ctlr = i;
1da177e4 4646
b368c9dd
AP		 4647 init_completion(&hba[i]->scan_wait);
4648
7fe06326
AP		 4649 if (cciss_create_hba_sysfs_entry(hba[i]))
4650 goto clean0;
4651
1da177e4 4652 /* configure PCI DMA stuff */
6a35528a 4653 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4654 dac = 1;
284901a9 4655 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4656 dac = 0;
1da177e4 4657 else {
40aabb58 4658 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4659 goto clean1;
4660 }
4661
4662 /*
4663 * register with the major number, or get a dynamic major number
4664 * by passing 0 as argument. This is done for greater than
4665 * 8 controller support.
4666 */
4667 if (i < MAX_CTLR_ORIG)
564de74a 4668 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4669 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4670 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4671 printk(KERN_ERR
7c832835
BH		 4672 "cciss: Unable to get major number %d for %s "
4673 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4674 goto clean1;
7c832835 4675 } else {
1da177e4
LT		 4676 if (i >= MAX_CTLR_ORIG)
4677 hba[i]->major = rc;
4678 }
4679
4680 /* make sure the board interrupts are off */
4681 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
0c2b3908 4682 if (hba[i]->msi_vector || hba[i]->msix_vector) {
256aea3f 4683 if (request_irq(hba[i]->intr[PERF_MODE_INT],
0c2b3908
MM		 4684 do_cciss_msix_intr,
4685 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4686 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
256aea3f 4687 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
0c2b3908
MM		 4688 goto clean2;
4689 }
4690 } else {
256aea3f 4691 if (request_irq(hba[i]->intr[PERF_MODE_INT], do_cciss_intx,
0c2b3908
MM		 4692 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4693 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
256aea3f 4694 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
0c2b3908
MM		 4695 goto clean2;
4696 }
1da177e4 4697 }
40aabb58
BH		 4698
4699 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835 4700 hba[i]->devname, pdev->device, pci_name(pdev),
5e216153 4701 hba[i]->intr[PERF_MODE_INT], dac ? "" : " not");
7c832835
BH		 4702
4703 hba[i]->cmd_pool_bits =
061837bc
JL		 4704 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4705 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4706 hba[i]->cmd_pool = (CommandList_struct *)
4707 pci_alloc_consistent(hba[i]->pdev,
f880632f 4708 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4709 &(hba[i]->cmd_pool_dhandle));
4710 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4711 pci_alloc_consistent(hba[i]->pdev,
f880632f 4712 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4713 &(hba[i]->errinfo_pool_dhandle));
4714 if ((hba[i]->cmd_pool_bits == NULL)
4715 || (hba[i]->cmd_pool == NULL)
4716 || (hba[i]->errinfo_pool == NULL)) {
4717 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4718 goto clean4;
4719 }
5c07a311
DB		 4720
4721 /* Need space for temp scatter list */
4722 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4723 sizeof(struct scatterlist *),
4724 GFP_KERNEL);
4725 for (k = 0; k < hba[i]->nr_cmds; k++) {
4726 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4727 hba[i]->maxsgentries,
4728 GFP_KERNEL);
4729 if (hba[i]->scatter_list[k] == NULL) {
4730 printk(KERN_ERR "cciss%d: could not allocate "
4731 "s/g lists\n", i);
4732 goto clean4;
4733 }
4734 }
49fc5601
SC		 4735 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
4736 hba[i]->chainsize, hba[i]->nr_cmds);
4737 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
5c07a311 4738 goto clean4;
5c07a311 4739
1da177e4 4740 spin_lock_init(&hba[i]->lock);
1da177e4 4741
7c832835
BH		 4742 /* Initialize the pdev driver private data.
4743 have it point to hba[i]. */
1da177e4 4744 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4745 /* command and error info recs zeroed out before
4746 they are used */
4747 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4748 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4749 * sizeof(unsigned long));
1da177e4 4750
6ae5ce8e
MM		 4751 hba[i]->num_luns = 0;
4752 hba[i]->highest_lun = -1;
4753 for (j = 0; j < CISS_MAX_LUN; j++) {
9cef0d2f 4754 hba[i]->drv[j] = NULL;
6ae5ce8e
MM		 4755 hba[i]->gendisk[j] = NULL;
4756 }
1da177e4
LT		 4757
4758 cciss_scsi_setup(i);
4759
4760 /* Turn the interrupts on so we can service requests */
4761 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4762
22bece00
MM		 4763 /* Get the firmware version */
4764 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4765 if (inq_buff == NULL) {
4766 printk(KERN_ERR "cciss: out of memory\n");
4767 goto clean4;
4768 }
4769
4770 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4771 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4772 if (return_code == IO_OK) {
4773 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4774 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4775 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4776 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4777 } else { /* send command failed */
4778 printk(KERN_WARNING "cciss: unable to determine firmware"
4779 " version of controller\n");
4780 }
212a5026 4781 kfree(inq_buff);
22bece00 4782
1da177e4 4783 cciss_procinit(i);
92c4231a 4784
5c07a311 4785 hba[i]->cciss_max_sectors = 8192;
92c4231a 4786
2d11d993 4787 rebuild_lun_table(hba[i], 1, 0);
d6dbf42e 4788 hba[i]->busy_initializing = 0;
e2019b58 4789 return 1;
1da177e4 4790
6ae5ce8e 4791clean4:
6044ec88 4792 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4793 /* Free up sg elements */
4794 for (k = 0; k < hba[i]->nr_cmds; k++)
4795 kfree(hba[i]->scatter_list[k]);
4796 kfree(hba[i]->scatter_list);
49fc5601 4797 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
7c832835 4798 if (hba[i]->cmd_pool)
1da177e4 4799 pci_free_consistent(hba[i]->pdev,
f880632f 4800 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4801 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4802 if (hba[i]->errinfo_pool)
1da177e4 4803 pci_free_consistent(hba[i]->pdev,
f880632f 4804 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4805 hba[i]->errinfo_pool,
4806 hba[i]->errinfo_pool_dhandle);
5e216153 4807 free_irq(hba[i]->intr[PERF_MODE_INT], hba[i]);
6ae5ce8e 4808clean2:
1da177e4 4809 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4810clean1:
7fe06326
AP		 4811 cciss_destroy_hba_sysfs_entry(hba[i]);
4812clean0:
2cfa948c
SC		 4813 pci_release_regions(pdev);
4814clean_no_release_regions:
1f8ef380 4815 hba[i]->busy_initializing = 0;
9cef0d2f 4816
872225ca
MM		 4817 /*
4818 * Deliberately omit pci_disable_device(): it does something nasty to
4819 * Smart Array controllers that pci_enable_device does not undo
4820 */
799202cb 4821 pci_set_drvdata(pdev, NULL);
61808c2b 4822 free_hba(i);
e2019b58 4823 return -1;
1da177e4
LT		 4824}
4825
e9ca75b5 4826static void cciss_shutdown(struct pci_dev *pdev)
1da177e4 4827{
29009a03
SC		 4828 ctlr_info_t *h;
4829 char *flush_buf;
7c832835 4830 int return_code;
1da177e4 4831
29009a03
SC		 4832 h = pci_get_drvdata(pdev);
4833 flush_buf = kzalloc(4, GFP_KERNEL);
4834 if (!flush_buf) {
4835 printk(KERN_WARNING
4836 "cciss:%d cache not flushed, out of memory.\n",
4837 h->ctlr);
e9ca75b5 4838 return;
e9ca75b5 4839 }
29009a03
SC		 4840 /* write all data in the battery backed cache to disk */
4841 memset(flush_buf, 0, 4);
4842 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4843 4, 0, CTLR_LUNID, TYPE_CMD);
4844 kfree(flush_buf);
4845 if (return_code != IO_OK)
4846 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4847 h->ctlr);
4848 h->access.set_intr_mask(h, CCISS_INTR_OFF);
5e216153 4849 free_irq(h->intr[PERF_MODE_INT], h);
e9ca75b5
GB		 4850}
4851
4852static void __devexit cciss_remove_one(struct pci_dev *pdev)
4853{
4854 ctlr_info_t *tmp_ptr;
4855 int i, j;
4856
7c832835
BH		 4857 if (pci_get_drvdata(pdev) == NULL) {
4858 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4859 return;
4860 }
0a9279cc 4861
1da177e4
LT		 4862 tmp_ptr = pci_get_drvdata(pdev);
4863 i = tmp_ptr->ctlr;
7c832835 4864 if (hba[i] == NULL) {
1da177e4 4865 printk(KERN_ERR "cciss: device appears to "
7c832835 4866 "already be removed \n");
1da177e4
LT		 4867 return;
4868 }
b6550777 4869
b368c9dd 4870 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4871
b368c9dd 4872 remove_from_scan_list(hba[i]);
b6550777
BH		 4873 remove_proc_entry(hba[i]->devname, proc_cciss);
4874 unregister_blkdev(hba[i]->major, hba[i]->devname);
4875
4876 /* remove it from the disk list */
4877 for (j = 0; j < CISS_MAX_LUN; j++) {
4878 struct gendisk *disk = hba[i]->gendisk[j];
4879 if (disk) {
165125e1 4880 struct request_queue *q = disk->queue;
b6550777 4881
097d0264 4882 if (disk->flags & GENHD_FL_UP) {
8ce51966 4883 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4884 del_gendisk(disk);
097d0264 4885 }
b6550777
BH		 4886 if (q)
4887 blk_cleanup_queue(q);
4888 }
4889 }
4890
ba198efb 4891#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4892 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4893#endif
b6550777 4894
e9ca75b5 4895 cciss_shutdown(pdev);
fb86a35b
MM		 4896
4897#ifdef CONFIG_PCI_MSI
7c832835
BH		 4898 if (hba[i]->msix_vector)
4899 pci_disable_msix(hba[i]->pdev);
4900 else if (hba[i]->msi_vector)
4901 pci_disable_msi(hba[i]->pdev);
4902#endif /* CONFIG_PCI_MSI */
fb86a35b 4903
da550321
SC		 4904 iounmap(hba[i]->transtable);
4905 iounmap(hba[i]->cfgtable);
1da177e4 4906 iounmap(hba[i]->vaddr);
1da177e4 4907
f880632f 4908 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4909 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4910 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4911 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4912 kfree(hba[i]->cmd_pool_bits);
5c07a311
DB		 4913 /* Free up sg elements */
4914 for (j = 0; j < hba[i]->nr_cmds; j++)
4915 kfree(hba[i]->scatter_list[j]);
4916 kfree(hba[i]->scatter_list);
49fc5601 4917 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
872225ca
MM		 4918 /*
4919 * Deliberately omit pci_disable_device(): it does something nasty to
4920 * Smart Array controllers that pci_enable_device does not undo
4921 */
7c832835 4922 pci_release_regions(pdev);
4e570309 4923 pci_set_drvdata(pdev, NULL);
7fe06326 4924 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4925 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4926 free_hba(i);
7c832835 4927}
1da177e4
LT		 4928
4929static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4930 .name = "cciss",
4931 .probe = cciss_init_one,
4932 .remove = __devexit_p(cciss_remove_one),
4933 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4934 .shutdown = cciss_shutdown,
1da177e4
LT		 4935};
4936
4937/*
4938 * This is it. Register the PCI driver information for the cards we control
7c832835 4939 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4940 */
4941static int __init cciss_init(void)
4942{
7fe06326
AP		 4943 int err;
4944
10cbda97
JA		 4945 /*
4946 * The hardware requires that commands are aligned on a 64-bit
4947 * boundary. Given that we use pci_alloc_consistent() to allocate an
4948 * array of them, the size must be a multiple of 8 bytes.
4949 */
1b7d0d28 4950 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
1da177e4
LT		 4951 printk(KERN_INFO DRIVER_NAME "\n");
4952
7fe06326
AP		 4953 err = bus_register(&cciss_bus_type);
4954 if (err)
4955 return err;
4956
b368c9dd
AP		 4957 /* Start the scan thread */
4958 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4959 if (IS_ERR(cciss_scan_thread)) {
4960 err = PTR_ERR(cciss_scan_thread);
4961 goto err_bus_unregister;
4962 }
4963
1da177e4 4964 /* Register for our PCI devices */
7fe06326
AP		 4965 err = pci_register_driver(&cciss_pci_driver);
4966 if (err)
b368c9dd 4967 goto err_thread_stop;
7fe06326 4968
617e1344 4969 return err;
7fe06326 4970
b368c9dd
AP		 4971err_thread_stop:
4972 kthread_stop(cciss_scan_thread);
4973err_bus_unregister:
7fe06326 4974 bus_unregister(&cciss_bus_type);
b368c9dd 4975
7fe06326 4976 return err;
1da177e4
LT		 4977}
4978
4979static void __exit cciss_cleanup(void)
4980{
4981 int i;
4982
4983 pci_unregister_driver(&cciss_pci_driver);
4984 /* double check that all controller entrys have been removed */
7c832835
BH		 4985 for (i = 0; i < MAX_CTLR; i++) {
4986 if (hba[i] != NULL) {
1da177e4 4987 printk(KERN_WARNING "cciss: had to remove"
7c832835 4988 " controller %d\n", i);
1da177e4
LT		 4989 cciss_remove_one(hba[i]->pdev);
4990 }
4991 }
b368c9dd 4992 kthread_stop(cciss_scan_thread);
928b4d8c 4993 remove_proc_entry("driver/cciss", NULL);
7fe06326 4994 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4995}
4996
4997module_init(cciss_init);
4998module_exit(cciss_cleanup);
Linux kernel - Deliverables
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