cciss: use consistent variable names
[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
f70dba83 194static void cciss_read_capacity(ctlr_info_t *h, int logvol,
00988a35 195 sector_t *total_size, unsigned int *block_size);
f70dba83 196static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
00988a35 197 sector_t *total_size, unsigned int *block_size);
f70dba83 198static void cciss_geometry_inquiry(ctlr_info_t *h, 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);
f70dba83 204static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, 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
f70dba83 232static void cciss_procinit(ctlr_info_t *h);
1da177e4 233#else
f70dba83 234static void cciss_procinit(ctlr_info_t *h)
7c832835
BH
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
f70dba83 419 cciss_seq_tape_report(seq, h);
89b6e743
MM
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;
89b6e743 426 unsigned long flags;
1da177e4
LT
427
428 /* prevent displaying bogus info during configuration
429 * or deconfiguration of a logical volume
430 */
f70dba83 431 spin_lock_irqsave(&h->lock, flags);
1da177e4 432 if (h->busy_configuring) {
f70dba83 433 spin_unlock_irqrestore(&h->lock, flags);
89b6e743 434 return ERR_PTR(-EBUSY);
1da177e4
LT
435 }
436 h->busy_configuring = 1;
f70dba83 437 spin_unlock_irqrestore(&h->lock, flags);
1da177e4 438
89b6e743
MM
439 if (*pos == 0)
440 cciss_seq_show_header(seq);
441
442 return pos;
443}
444
445static int cciss_seq_show(struct seq_file *seq, void *v)
446{
447 sector_t vol_sz, vol_sz_frac;
448 ctlr_info_t *h = seq->private;
449 unsigned ctlr = h->ctlr;
450 loff_t *pos = v;
9cef0d2f 451 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM
452
453 if (*pos > h->highest_lun)
454 return 0;
455
531c2dc7
SC
456 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
457 return 0;
458
89b6e743
MM
459 if (drv->heads == 0)
460 return 0;
461
462 vol_sz = drv->nr_blocks;
463 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
464 vol_sz_frac *= 100;
465 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
466
fa52bec9 467 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM
468 drv->raid_level = RAID_UNKNOWN;
469 seq_printf(seq, "cciss/c%dd%d:"
470 "\t%4u.%02uGB\tRAID %s\n",
471 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
472 raid_label[drv->raid_level]);
473 return 0;
474}
475
476static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
477{
478 ctlr_info_t *h = seq->private;
479
480 if (*pos > h->highest_lun)
481 return NULL;
482 *pos += 1;
483
484 return pos;
485}
486
487static void cciss_seq_stop(struct seq_file *seq, void *v)
488{
489 ctlr_info_t *h = seq->private;
490
491 /* Only reset h->busy_configuring if we succeeded in setting
492 * it during cciss_seq_start. */
493 if (v == ERR_PTR(-EBUSY))
494 return;
7c832835 495
1da177e4 496 h->busy_configuring = 0;
1da177e4
LT
497}
498
88e9d34c 499static const struct seq_operations cciss_seq_ops = {
89b6e743
MM
500 .start = cciss_seq_start,
501 .show = cciss_seq_show,
502 .next = cciss_seq_next,
503 .stop = cciss_seq_stop,
504};
505
506static int cciss_seq_open(struct inode *inode, struct file *file)
507{
508 int ret = seq_open(file, &cciss_seq_ops);
509 struct seq_file *seq = file->private_data;
510
511 if (!ret)
512 seq->private = PDE(inode)->data;
513
514 return ret;
515}
516
517static ssize_t
518cciss_proc_write(struct file *file, const char __user *buf,
519 size_t length, loff_t *ppos)
1da177e4 520{
89b6e743
MM
521 int err;
522 char *buffer;
523
524#ifndef CONFIG_CISS_SCSI_TAPE
525 return -EINVAL;
1da177e4
LT
526#endif
527
89b6e743 528 if (!buf || length > PAGE_SIZE - 1)
7c832835 529 return -EINVAL;
89b6e743
MM
530
531 buffer = (char *)__get_free_page(GFP_KERNEL);
532 if (!buffer)
533 return -ENOMEM;
534
535 err = -EFAULT;
536 if (copy_from_user(buffer, buf, length))
537 goto out;
538 buffer[length] = '\0';
539
540#ifdef CONFIG_CISS_SCSI_TAPE
541 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
542 struct seq_file *seq = file->private_data;
543 ctlr_info_t *h = seq->private;
89b6e743 544
f70dba83 545 err = cciss_engage_scsi(h);
8721c81f 546 if (err == 0)
89b6e743
MM
547 err = length;
548 } else
549#endif /* CONFIG_CISS_SCSI_TAPE */
550 err = -EINVAL;
7c832835
BH
551 /* might be nice to have "disengage" too, but it's not
552 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM
553
554out:
555 free_page((unsigned long)buffer);
556 return err;
1da177e4
LT
557}
558
828c0950 559static const struct file_operations cciss_proc_fops = {
89b6e743
MM
560 .owner = THIS_MODULE,
561 .open = cciss_seq_open,
562 .read = seq_read,
563 .llseek = seq_lseek,
564 .release = seq_release,
565 .write = cciss_proc_write,
566};
567
f70dba83 568static void __devinit cciss_procinit(ctlr_info_t *h)
1da177e4
LT
569{
570 struct proc_dir_entry *pde;
571
89b6e743 572 if (proc_cciss == NULL)
928b4d8c 573 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM
574 if (!proc_cciss)
575 return;
f70dba83 576 pde = proc_create_data(h->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 577 S_IROTH, proc_cciss,
f70dba83 578 &cciss_proc_fops, h);
1da177e4 579}
7c832835 580#endif /* CONFIG_PROC_FS */
1da177e4 581
7fe06326
AP
582#define MAX_PRODUCT_NAME_LEN 19
583
584#define to_hba(n) container_of(n, struct ctlr_info, dev)
585#define to_drv(n) container_of(n, drive_info_struct, dev)
586
d6f4965d
AP
587static ssize_t host_store_rescan(struct device *dev,
588 struct device_attribute *attr,
589 const char *buf, size_t count)
590{
591 struct ctlr_info *h = to_hba(dev);
592
593 add_to_scan_list(h);
594 wake_up_process(cciss_scan_thread);
595 wait_for_completion_interruptible(&h->scan_wait);
596
597 return count;
598}
8ba95c69 599static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP
600
601static ssize_t dev_show_unique_id(struct device *dev,
602 struct device_attribute *attr,
603 char *buf)
604{
605 drive_info_struct *drv = to_drv(dev);
606 struct ctlr_info *h = to_hba(drv->dev.parent);
607 __u8 sn[16];
608 unsigned long flags;
609 int ret = 0;
610
f70dba83 611 spin_lock_irqsave(&h->lock, flags);
7fe06326
AP
612 if (h->busy_configuring)
613 ret = -EBUSY;
614 else
615 memcpy(sn, drv->serial_no, sizeof(sn));
f70dba83 616 spin_unlock_irqrestore(&h->lock, flags);
7fe06326
AP
617
618 if (ret)
619 return ret;
620 else
621 return snprintf(buf, 16 * 2 + 2,
622 "%02X%02X%02X%02X%02X%02X%02X%02X"
623 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
624 sn[0], sn[1], sn[2], sn[3],
625 sn[4], sn[5], sn[6], sn[7],
626 sn[8], sn[9], sn[10], sn[11],
627 sn[12], sn[13], sn[14], sn[15]);
628}
8ba95c69 629static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP
630
631static ssize_t dev_show_vendor(struct device *dev,
632 struct device_attribute *attr,
633 char *buf)
634{
635 drive_info_struct *drv = to_drv(dev);
636 struct ctlr_info *h = to_hba(drv->dev.parent);
637 char vendor[VENDOR_LEN + 1];
638 unsigned long flags;
639 int ret = 0;
640
f70dba83 641 spin_lock_irqsave(&h->lock, flags);
7fe06326
AP
642 if (h->busy_configuring)
643 ret = -EBUSY;
644 else
645 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
f70dba83 646 spin_unlock_irqrestore(&h->lock, flags);
7fe06326
AP
647
648 if (ret)
649 return ret;
650 else
651 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
652}
8ba95c69 653static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP
654
655static ssize_t dev_show_model(struct device *dev,
656 struct device_attribute *attr,
657 char *buf)
658{
659 drive_info_struct *drv = to_drv(dev);
660 struct ctlr_info *h = to_hba(drv->dev.parent);
661 char model[MODEL_LEN + 1];
662 unsigned long flags;
663 int ret = 0;
664
f70dba83 665 spin_lock_irqsave(&h->lock, flags);
7fe06326
AP
666 if (h->busy_configuring)
667 ret = -EBUSY;
668 else
669 memcpy(model, drv->model, MODEL_LEN + 1);
f70dba83 670 spin_unlock_irqrestore(&h->lock, flags);
7fe06326
AP
671
672 if (ret)
673 return ret;
674 else
675 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
676}
8ba95c69 677static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP
678
679static ssize_t dev_show_rev(struct device *dev,
680 struct device_attribute *attr,
681 char *buf)
682{
683 drive_info_struct *drv = to_drv(dev);
684 struct ctlr_info *h = to_hba(drv->dev.parent);
685 char rev[REV_LEN + 1];
686 unsigned long flags;
687 int ret = 0;
688
f70dba83 689 spin_lock_irqsave(&h->lock, flags);
7fe06326
AP
690 if (h->busy_configuring)
691 ret = -EBUSY;
692 else
693 memcpy(rev, drv->rev, REV_LEN + 1);
f70dba83 694 spin_unlock_irqrestore(&h->lock, flags);
7fe06326
AP
695
696 if (ret)
697 return ret;
698 else
699 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
700}
8ba95c69 701static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 702
ce84a8ae
SC
703static ssize_t cciss_show_lunid(struct device *dev,
704 struct device_attribute *attr, char *buf)
705{
9cef0d2f
SC
706 drive_info_struct *drv = to_drv(dev);
707 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC
708 unsigned long flags;
709 unsigned char lunid[8];
710
f70dba83 711 spin_lock_irqsave(&h->lock, flags);
ce84a8ae 712 if (h->busy_configuring) {
f70dba83 713 spin_unlock_irqrestore(&h->lock, flags);
ce84a8ae
SC
714 return -EBUSY;
715 }
716 if (!drv->heads) {
f70dba83 717 spin_unlock_irqrestore(&h->lock, flags);
ce84a8ae
SC
718 return -ENOTTY;
719 }
720 memcpy(lunid, drv->LunID, sizeof(lunid));
f70dba83 721 spin_unlock_irqrestore(&h->lock, flags);
ce84a8ae
SC
722 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
723 lunid[0], lunid[1], lunid[2], lunid[3],
724 lunid[4], lunid[5], lunid[6], lunid[7]);
725}
8ba95c69 726static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 727
3ff1111d
SC
728static ssize_t cciss_show_raid_level(struct device *dev,
729 struct device_attribute *attr, char *buf)
730{
9cef0d2f
SC
731 drive_info_struct *drv = to_drv(dev);
732 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC
733 int raid;
734 unsigned long flags;
735
f70dba83 736 spin_lock_irqsave(&h->lock, flags);
3ff1111d 737 if (h->busy_configuring) {
f70dba83 738 spin_unlock_irqrestore(&h->lock, flags);
3ff1111d
SC
739 return -EBUSY;
740 }
741 raid = drv->raid_level;
f70dba83 742 spin_unlock_irqrestore(&h->lock, flags);
3ff1111d
SC
743 if (raid < 0 || raid > RAID_UNKNOWN)
744 raid = RAID_UNKNOWN;
745
746 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
747 raid_label[raid]);
748}
8ba95c69 749static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 750
e272afec
SC
751static ssize_t cciss_show_usage_count(struct device *dev,
752 struct device_attribute *attr, char *buf)
753{
9cef0d2f
SC
754 drive_info_struct *drv = to_drv(dev);
755 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC
756 unsigned long flags;
757 int count;
758
f70dba83 759 spin_lock_irqsave(&h->lock, flags);
e272afec 760 if (h->busy_configuring) {
f70dba83 761 spin_unlock_irqrestore(&h->lock, flags);
e272afec
SC
762 return -EBUSY;
763 }
764 count = drv->usage_count;
f70dba83 765 spin_unlock_irqrestore(&h->lock, flags);
e272afec
SC
766 return snprintf(buf, 20, "%d\n", count);
767}
8ba95c69 768static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 769
d6f4965d
AP
770static struct attribute *cciss_host_attrs[] = {
771 &dev_attr_rescan.attr,
772 NULL
773};
774
775static struct attribute_group cciss_host_attr_group = {
776 .attrs = cciss_host_attrs,
777};
778
9f792d9f 779static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP
780 &cciss_host_attr_group,
781 NULL
782};
783
784static struct device_type cciss_host_type = {
785 .name = "cciss_host",
786 .groups = cciss_host_attr_groups,
617e1344 787 .release = cciss_hba_release,
d6f4965d
AP
788};
789
7fe06326
AP
790static struct attribute *cciss_dev_attrs[] = {
791 &dev_attr_unique_id.attr,
792 &dev_attr_model.attr,
793 &dev_attr_vendor.attr,
794 &dev_attr_rev.attr,
ce84a8ae 795 &dev_attr_lunid.attr,
3ff1111d 796 &dev_attr_raid_level.attr,
e272afec 797 &dev_attr_usage_count.attr,
7fe06326
AP
798 NULL
799};
800
801static struct attribute_group cciss_dev_attr_group = {
802 .attrs = cciss_dev_attrs,
803};
804
a4dbd674 805static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP
806 &cciss_dev_attr_group,
807 NULL
808};
809
810static struct device_type cciss_dev_type = {
811 .name = "cciss_device",
812 .groups = cciss_dev_attr_groups,
617e1344 813 .release = cciss_device_release,
7fe06326
AP
814};
815
816static struct bus_type cciss_bus_type = {
817 .name = "cciss",
818};
819
617e1344
SC
820/*
821 * cciss_hba_release is called when the reference count
822 * of h->dev goes to zero.
823 */
824static void cciss_hba_release(struct device *dev)
825{
826 /*
827 * nothing to do, but need this to avoid a warning
828 * about not having a release handler from lib/kref.c.
829 */
830}
7fe06326
AP
831
832/*
833 * Initialize sysfs entry for each controller. This sets up and registers
834 * the 'cciss#' directory for each individual controller under
835 * /sys/bus/pci/devices/<dev>/.
836 */
837static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
838{
839 device_initialize(&h->dev);
840 h->dev.type = &cciss_host_type;
841 h->dev.bus = &cciss_bus_type;
842 dev_set_name(&h->dev, "%s", h->devname);
843 h->dev.parent = &h->pdev->dev;
844
845 return device_add(&h->dev);
846}
847
848/*
849 * Remove sysfs entries for an hba.
850 */
851static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
852{
853 device_del(&h->dev);
617e1344
SC
854 put_device(&h->dev); /* final put. */
855}
856
857/* cciss_device_release is called when the reference count
9cef0d2f 858 * of h->drv[x]dev goes to zero.
617e1344
SC
859 */
860static void cciss_device_release(struct device *dev)
861{
9cef0d2f
SC
862 drive_info_struct *drv = to_drv(dev);
863 kfree(drv);
7fe06326
AP
864}
865
866/*
867 * Initialize sysfs for each logical drive. This sets up and registers
868 * the 'c#d#' directory for each individual logical drive under
869 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
870 * /sys/block/cciss!c#d# to this entry.
871 */
617e1344 872static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP
873 int drv_index)
874{
617e1344
SC
875 struct device *dev;
876
9cef0d2f 877 if (h->drv[drv_index]->device_initialized)
8ce51966
SC
878 return 0;
879
9cef0d2f 880 dev = &h->drv[drv_index]->dev;
617e1344
SC
881 device_initialize(dev);
882 dev->type = &cciss_dev_type;
883 dev->bus = &cciss_bus_type;
884 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
885 dev->parent = &h->dev;
9cef0d2f 886 h->drv[drv_index]->device_initialized = 1;
617e1344 887 return device_add(dev);
7fe06326
AP
888}
889
890/*
891 * Remove sysfs entries for a logical drive.
892 */
8ce51966
SC
893static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
894 int ctlr_exiting)
7fe06326 895{
9cef0d2f 896 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC
897
898 /* special case for c*d0, we only destroy it on controller exit */
899 if (drv_index == 0 && !ctlr_exiting)
900 return;
901
617e1344
SC
902 device_del(dev);
903 put_device(dev); /* the "final" put. */
9cef0d2f 904 h->drv[drv_index] = NULL;
7fe06326
AP
905}
906
7c832835
BH
907/*
908 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 909 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH
910 * which ones are free or in use. For operations that can wait for kmalloc
911 * to possible sleep, this routine can be called with get_from_pool set to 0.
912 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
913 */
914static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT
915{
916 CommandList_struct *c;
7c832835 917 int i;
1da177e4
LT
918 u64bit temp64;
919 dma_addr_t cmd_dma_handle, err_dma_handle;
920
7c832835
BH
921 if (!get_from_pool) {
922 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
923 sizeof(CommandList_struct), &cmd_dma_handle);
924 if (c == NULL)
925 return NULL;
1da177e4
LT
926 memset(c, 0, sizeof(CommandList_struct));
927
33079b21
MM
928 c->cmdindex = -1;
929
7c832835
BH
930 c->err_info = (ErrorInfo_struct *)
931 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
932 &err_dma_handle);
933
934 if (c->err_info == NULL) {
935 pci_free_consistent(h->pdev,
1da177e4
LT
936 sizeof(CommandList_struct), c, cmd_dma_handle);
937 return NULL;
938 }
939 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH
940 } else { /* get it out of the controllers pool */
941
942 do {
f880632f
MM
943 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
944 if (i == h->nr_cmds)
7c832835
BH
945 return NULL;
946 } while (test_and_set_bit
947 (i & (BITS_PER_LONG - 1),
948 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT
949#ifdef CCISS_DEBUG
950 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
951#endif
7c832835 952 c = h->cmd_pool + i;
1da177e4 953 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH
954 cmd_dma_handle = h->cmd_pool_dhandle
955 + i * sizeof(CommandList_struct);
1da177e4
LT
956 c->err_info = h->errinfo_pool + i;
957 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH
958 err_dma_handle = h->errinfo_pool_dhandle
959 + i * sizeof(ErrorInfo_struct);
960 h->nr_allocs++;
33079b21
MM
961
962 c->cmdindex = i;
7c832835 963 }
1da177e4 964
8a3173de 965 INIT_HLIST_NODE(&c->list);
1da177e4 966 c->busaddr = (__u32) cmd_dma_handle;
7c832835 967 temp64.val = (__u64) err_dma_handle;
1da177e4
LT
968 c->ErrDesc.Addr.lower = temp64.val32.lower;
969 c->ErrDesc.Addr.upper = temp64.val32.upper;
970 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 971
7c832835
BH
972 c->ctlr = h->ctlr;
973 return c;
1da177e4
LT
974}
975
7c832835
BH
976/*
977 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT
978 */
979static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
980{
981 int i;
982 u64bit temp64;
983
7c832835 984 if (!got_from_pool) {
1da177e4
LT
985 temp64.val32.lower = c->ErrDesc.Addr.lower;
986 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH
987 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
988 c->err_info, (dma_addr_t) temp64.val);
989 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
990 c, (dma_addr_t) c->busaddr);
991 } else {
1da177e4 992 i = c - h->cmd_pool;
7c832835
BH
993 clear_bit(i & (BITS_PER_LONG - 1),
994 h->cmd_pool_bits + (i / BITS_PER_LONG));
995 h->nr_frees++;
996 }
1da177e4
LT
997}
998
999static inline ctlr_info_t *get_host(struct gendisk *disk)
1000{
7c832835 1001 return disk->queue->queuedata;
1da177e4
LT
1002}
1003
1004static inline drive_info_struct *get_drv(struct gendisk *disk)
1005{
1006 return disk->private_data;
1007}
1008
1009/*
1010 * Open. Make sure the device is really there.
1011 */
ef7822c2 1012static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 1013{
f70dba83 1014 ctlr_info_t *h = get_host(bdev->bd_disk);
ef7822c2 1015 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT
1016
1017#ifdef CCISS_DEBUG
ef7822c2 1018 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 1019#endif /* CCISS_DEBUG */
1da177e4 1020
2e043986 1021 if (drv->busy_configuring)
ddd47442 1022 return -EBUSY;
1da177e4
LT
1023 /*
1024 * Root is allowed to open raw volume zero even if it's not configured
1025 * so array config can still work. Root is also allowed to open any
1026 * volume that has a LUN ID, so it can issue IOCTL to reread the
1027 * disk information. I don't think I really like this
1028 * but I'm already using way to many device nodes to claim another one
1029 * for "raw controller".
1030 */
7a06f789 1031 if (drv->heads == 0) {
ef7822c2 1032 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 1033 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 1034 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 1035 return -ENXIO;
1da177e4 1036 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC
1037 } else if (memcmp(drv->LunID, CTLR_LUNID,
1038 sizeof(drv->LunID))) {
1da177e4
LT
1039 return -ENXIO;
1040 }
1041 }
1042 if (!capable(CAP_SYS_ADMIN))
1043 return -EPERM;
1044 }
1045 drv->usage_count++;
f70dba83 1046 h->usage_count++;
1da177e4
LT
1047 return 0;
1048}
7c832835 1049
6e9624b8
AB
1050static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode)
1051{
1052 int ret;
1053
1054 lock_kernel();
1055 ret = cciss_open(bdev, mode);
1056 unlock_kernel();
1057
1058 return ret;
1059}
1060
1da177e4
LT
1061/*
1062 * Close. Sync first.
1063 */
ef7822c2 1064static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 1065{
f70dba83 1066 ctlr_info_t *h;
6e9624b8
AB
1067 drive_info_struct *drv;
1068
1069 lock_kernel();
f70dba83 1070 h = get_host(disk);
6e9624b8 1071 drv = get_drv(disk);
1da177e4
LT
1072
1073#ifdef CCISS_DEBUG
ef7822c2 1074 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 1075#endif /* CCISS_DEBUG */
1da177e4
LT
1076
1077 drv->usage_count--;
f70dba83 1078 h->usage_count--;
6e9624b8 1079 unlock_kernel();
1da177e4
LT
1080 return 0;
1081}
1082
ef7822c2
AV
1083static int do_ioctl(struct block_device *bdev, fmode_t mode,
1084 unsigned cmd, unsigned long arg)
1da177e4
LT
1085{
1086 int ret;
1087 lock_kernel();
ef7822c2 1088 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT
1089 unlock_kernel();
1090 return ret;
1091}
1092
8a6cfeb6
AB
1093#ifdef CONFIG_COMPAT
1094
ef7822c2
AV
1095static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1096 unsigned cmd, unsigned long arg);
1097static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1098 unsigned cmd, unsigned long arg);
1da177e4 1099
ef7822c2
AV
1100static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1101 unsigned cmd, unsigned long arg)
1da177e4
LT
1102{
1103 switch (cmd) {
1104 case CCISS_GETPCIINFO:
1105 case CCISS_GETINTINFO:
1106 case CCISS_SETINTINFO:
1107 case CCISS_GETNODENAME:
1108 case CCISS_SETNODENAME:
1109 case CCISS_GETHEARTBEAT:
1110 case CCISS_GETBUSTYPES:
1111 case CCISS_GETFIRMVER:
1112 case CCISS_GETDRIVVER:
1113 case CCISS_REVALIDVOLS:
1114 case CCISS_DEREGDISK:
1115 case CCISS_REGNEWDISK:
1116 case CCISS_REGNEWD:
1117 case CCISS_RESCANDISK:
1118 case CCISS_GETLUNINFO:
ef7822c2 1119 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT
1120
1121 case CCISS_PASSTHRU32:
ef7822c2 1122 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 1123 case CCISS_BIG_PASSTHRU32:
ef7822c2 1124 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT
1125
1126 default:
1127 return -ENOIOCTLCMD;
1128 }
1129}
1130
ef7822c2
AV
1131static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1132 unsigned cmd, unsigned long arg)
1da177e4
LT
1133{
1134 IOCTL32_Command_struct __user *arg32 =
7c832835 1135 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT
1136 IOCTL_Command_struct arg64;
1137 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1138 int err;
1139 u32 cp;
1140
1141 err = 0;
7c832835
BH
1142 err |=
1143 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1144 sizeof(arg64.LUN_info));
1145 err |=
1146 copy_from_user(&arg64.Request, &arg32->Request,
1147 sizeof(arg64.Request));
1148 err |=
1149 copy_from_user(&arg64.error_info, &arg32->error_info,
1150 sizeof(arg64.error_info));
1da177e4
LT
1151 err |= get_user(arg64.buf_size, &arg32->buf_size);
1152 err |= get_user(cp, &arg32->buf);
1153 arg64.buf = compat_ptr(cp);
1154 err |= copy_to_user(p, &arg64, sizeof(arg64));
1155
1156 if (err)
1157 return -EFAULT;
1158
ef7822c2 1159 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT
1160 if (err)
1161 return err;
7c832835
BH
1162 err |=
1163 copy_in_user(&arg32->error_info, &p->error_info,
1164 sizeof(arg32->error_info));
1da177e4
LT
1165 if (err)
1166 return -EFAULT;
1167 return err;
1168}
1169
ef7822c2
AV
1170static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1171 unsigned cmd, unsigned long arg)
1da177e4
LT
1172{
1173 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1174 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1175 BIG_IOCTL_Command_struct arg64;
7c832835
BH
1176 BIG_IOCTL_Command_struct __user *p =
1177 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT
1178 int err;
1179 u32 cp;
1180
1181 err = 0;
7c832835
BH
1182 err |=
1183 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1184 sizeof(arg64.LUN_info));
1185 err |=
1186 copy_from_user(&arg64.Request, &arg32->Request,
1187 sizeof(arg64.Request));
1188 err |=
1189 copy_from_user(&arg64.error_info, &arg32->error_info,
1190 sizeof(arg64.error_info));
1da177e4
LT
1191 err |= get_user(arg64.buf_size, &arg32->buf_size);
1192 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1193 err |= get_user(cp, &arg32->buf);
1194 arg64.buf = compat_ptr(cp);
1195 err |= copy_to_user(p, &arg64, sizeof(arg64));
1196
1197 if (err)
7c832835 1198 return -EFAULT;
1da177e4 1199
ef7822c2 1200 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT
1201 if (err)
1202 return err;
7c832835
BH
1203 err |=
1204 copy_in_user(&arg32->error_info, &p->error_info,
1205 sizeof(arg32->error_info));
1da177e4
LT
1206 if (err)
1207 return -EFAULT;
1208 return err;
1209}
1210#endif
a885c8c4
CH
1211
1212static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1213{
1214 drive_info_struct *drv = get_drv(bdev->bd_disk);
1215
1216 if (!drv->cylinders)
1217 return -ENXIO;
1218
1219 geo->heads = drv->heads;
1220 geo->sectors = drv->sectors;
1221 geo->cylinders = drv->cylinders;
1222 return 0;
1223}
1224
f70dba83 1225static void check_ioctl_unit_attention(ctlr_info_t *h, CommandList_struct *c)
0a9279cc
MM
1226{
1227 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1228 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
f70dba83 1229 (void)check_for_unit_attention(h, c);
0a9279cc 1230}
1da177e4 1231/*
7c832835 1232 * ioctl
1da177e4 1233 */
ef7822c2 1234static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1235 unsigned int cmd, unsigned long arg)
1da177e4 1236{
1da177e4 1237 struct gendisk *disk = bdev->bd_disk;
f70dba83 1238 ctlr_info_t *h = get_host(disk);
1da177e4 1239 drive_info_struct *drv = get_drv(disk);
1da177e4
LT
1240 void __user *argp = (void __user *)arg;
1241
1242#ifdef CCISS_DEBUG
1243 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH
1244#endif /* CCISS_DEBUG */
1245
1246 switch (cmd) {
1da177e4 1247 case CCISS_GETPCIINFO:
7c832835
BH
1248 {
1249 cciss_pci_info_struct pciinfo;
1250
1251 if (!arg)
1252 return -EINVAL;
f70dba83
SC
1253 pciinfo.domain = pci_domain_nr(h->pdev->bus);
1254 pciinfo.bus = h->pdev->bus->number;
1255 pciinfo.dev_fn = h->pdev->devfn;
1256 pciinfo.board_id = h->board_id;
7c832835
BH
1257 if (copy_to_user
1258 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1259 return -EFAULT;
1260 return 0;
1261 }
1da177e4 1262 case CCISS_GETINTINFO:
7c832835
BH
1263 {
1264 cciss_coalint_struct intinfo;
1265 if (!arg)
1266 return -EINVAL;
1267 intinfo.delay =
f70dba83 1268 readl(&h->cfgtable->HostWrite.CoalIntDelay);
7c832835 1269 intinfo.count =
f70dba83 1270 readl(&h->cfgtable->HostWrite.CoalIntCount);
7c832835
BH
1271 if (copy_to_user
1272 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1273 return -EFAULT;
1274 return 0;
1275 }
1da177e4 1276 case CCISS_SETINTINFO:
1da177e4 1277 {
7c832835
BH
1278 cciss_coalint_struct intinfo;
1279 unsigned long flags;
1280 int i;
1281
1282 if (!arg)
1283 return -EINVAL;
1284 if (!capable(CAP_SYS_ADMIN))
1285 return -EPERM;
1286 if (copy_from_user
1287 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1288 return -EFAULT;
1289 if ((intinfo.delay == 0) && (intinfo.count == 0))
1290 {
1291// printk("cciss_ioctl: delay and count cannot be 0\n");
1292 return -EINVAL;
1293 }
f70dba83 1294 spin_lock_irqsave(&h->lock, flags);
7c832835
BH
1295 /* Update the field, and then ring the doorbell */
1296 writel(intinfo.delay,
f70dba83 1297 &(h->cfgtable->HostWrite.CoalIntDelay));
7c832835 1298 writel(intinfo.count,
f70dba83
SC
1299 &(h->cfgtable->HostWrite.CoalIntCount));
1300 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
7c832835
BH
1301
1302 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
f70dba83 1303 if (!(readl(h->vaddr + SA5_DOORBELL)
7c832835
BH
1304 & CFGTBL_ChangeReq))
1305 break;
1306 /* delay and try again */
1307 udelay(1000);
1308 }
f70dba83 1309 spin_unlock_irqrestore(&h->lock, flags);
7c832835
BH
1310 if (i >= MAX_IOCTL_CONFIG_WAIT)
1311 return -EAGAIN;
1312 return 0;
1da177e4 1313 }
1da177e4 1314 case CCISS_GETNODENAME:
7c832835
BH
1315 {
1316 NodeName_type NodeName;
1317 int i;
1318
1319 if (!arg)
1320 return -EINVAL;
1321 for (i = 0; i < 16; i++)
1322 NodeName[i] =
f70dba83 1323 readb(&h->cfgtable->ServerName[i]);
7c832835
BH
1324 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1325 return -EFAULT;
1326 return 0;
1327 }
1da177e4 1328 case CCISS_SETNODENAME:
7c832835
BH
1329 {
1330 NodeName_type NodeName;
1331 unsigned long flags;
1332 int i;
1333
1334 if (!arg)
1335 return -EINVAL;
1336 if (!capable(CAP_SYS_ADMIN))
1337 return -EPERM;
1338
1339 if (copy_from_user
1340 (NodeName, argp, sizeof(NodeName_type)))
1341 return -EFAULT;
1342
f70dba83 1343 spin_lock_irqsave(&h->lock, flags);
7c832835
BH
1344
1345 /* Update the field, and then ring the doorbell */
1346 for (i = 0; i < 16; i++)
1347 writeb(NodeName[i],
f70dba83 1348 &h->cfgtable->ServerName[i]);
7c832835 1349
f70dba83 1350 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
7c832835
BH
1351
1352 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
f70dba83 1353 if (!(readl(h->vaddr + SA5_DOORBELL)
7c832835
BH
1354 & CFGTBL_ChangeReq))
1355 break;
1356 /* delay and try again */
1357 udelay(1000);
1358 }
f70dba83 1359 spin_unlock_irqrestore(&h->lock, flags);
7c832835
BH
1360 if (i >= MAX_IOCTL_CONFIG_WAIT)
1361 return -EAGAIN;
1362 return 0;
1363 }
1da177e4
LT
1364
1365 case CCISS_GETHEARTBEAT:
7c832835
BH
1366 {
1367 Heartbeat_type heartbeat;
1368
1369 if (!arg)
1370 return -EINVAL;
f70dba83 1371 heartbeat = readl(&h->cfgtable->HeartBeat);
7c832835
BH
1372 if (copy_to_user
1373 (argp, &heartbeat, sizeof(Heartbeat_type)))
1374 return -EFAULT;
1375 return 0;
1376 }
1da177e4 1377 case CCISS_GETBUSTYPES:
7c832835
BH
1378 {
1379 BusTypes_type BusTypes;
1380
1381 if (!arg)
1382 return -EINVAL;
f70dba83 1383 BusTypes = readl(&h->cfgtable->BusTypes);
7c832835
BH
1384 if (copy_to_user
1385 (argp, &BusTypes, sizeof(BusTypes_type)))
1386 return -EFAULT;
1387 return 0;
1388 }
1da177e4 1389 case CCISS_GETFIRMVER:
7c832835
BH
1390 {
1391 FirmwareVer_type firmware;
1da177e4 1392
7c832835
BH
1393 if (!arg)
1394 return -EINVAL;
f70dba83 1395 memcpy(firmware, h->firm_ver, 4);
1da177e4 1396
7c832835
BH
1397 if (copy_to_user
1398 (argp, firmware, sizeof(FirmwareVer_type)))
1399 return -EFAULT;
1400 return 0;
1401 }
1402 case CCISS_GETDRIVVER:
1403 {
1404 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1405
7c832835
BH
1406 if (!arg)
1407 return -EINVAL;
1da177e4 1408
7c832835
BH
1409 if (copy_to_user
1410 (argp, &DriverVer, sizeof(DriverVer_type)))
1411 return -EFAULT;
1412 return 0;
1413 }
1da177e4 1414
6ae5ce8e
MM
1415 case CCISS_DEREGDISK:
1416 case CCISS_REGNEWD:
1da177e4 1417 case CCISS_REVALIDVOLS:
f70dba83 1418 return rebuild_lun_table(h, 0, 1);
7c832835
BH
1419
1420 case CCISS_GETLUNINFO:{
1421 LogvolInfo_struct luninfo;
1422
39ccf9a6
SC
1423 memcpy(&luninfo.LunID, drv->LunID,
1424 sizeof(luninfo.LunID));
7c832835
BH
1425 luninfo.num_opens = drv->usage_count;
1426 luninfo.num_parts = 0;
1427 if (copy_to_user(argp, &luninfo,
1428 sizeof(LogvolInfo_struct)))
1429 return -EFAULT;
1430 return 0;
1431 }
1da177e4 1432 case CCISS_PASSTHRU:
1da177e4 1433 {
7c832835
BH
1434 IOCTL_Command_struct iocommand;
1435 CommandList_struct *c;
1436 char *buff = NULL;
1437 u64bit temp64;
6e9a4738 1438 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1439
7c832835
BH
1440 if (!arg)
1441 return -EINVAL;
1da177e4 1442
7c832835
BH
1443 if (!capable(CAP_SYS_RAWIO))
1444 return -EPERM;
1da177e4 1445
7c832835
BH
1446 if (copy_from_user
1447 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1448 return -EFAULT;
1449 if ((iocommand.buf_size < 1) &&
1450 (iocommand.Request.Type.Direction != XFER_NONE)) {
1451 return -EINVAL;
1452 }
1453#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1454 /* Check kmalloc limits */
1455 if (iocommand.buf_size > 128000)
1456 return -EINVAL;
1457#endif
1458 if (iocommand.buf_size > 0) {
1459 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1460 if (buff == NULL)
1461 return -EFAULT;
1462 }
1463 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1464 /* Copy the data into the buffer we created */
1465 if (copy_from_user
1466 (buff, iocommand.buf, iocommand.buf_size)) {
1467 kfree(buff);
1468 return -EFAULT;
1469 }
1470 } else {
1471 memset(buff, 0, iocommand.buf_size);
1472 }
f70dba83
SC
1473 c = cmd_alloc(h, 0);
1474 if (!c) {
7c832835
BH
1475 kfree(buff);
1476 return -ENOMEM;
1477 }
b028461d 1478 /* Fill in the command type */
7c832835 1479 c->cmd_type = CMD_IOCTL_PEND;
b028461d 1480 /* Fill in Command Header */
1481 c->Header.ReplyQueue = 0; /* unused in simple mode */
1482 if (iocommand.buf_size > 0) /* buffer to fill */
7c832835
BH
1483 {
1484 c->Header.SGList = 1;
1485 c->Header.SGTotal = 1;
b028461d 1486 } else /* no buffers to fill */
7c832835
BH
1487 {
1488 c->Header.SGList = 0;
1489 c->Header.SGTotal = 0;
1490 }
1491 c->Header.LUN = iocommand.LUN_info;
b028461d 1492 /* use the kernel address the cmd block for tag */
1493 c->Header.Tag.lower = c->busaddr;
1da177e4 1494
b028461d 1495 /* Fill in Request block */
7c832835 1496 c->Request = iocommand.Request;
1da177e4 1497
b028461d 1498 /* Fill in the scatter gather information */
7c832835 1499 if (iocommand.buf_size > 0) {
f70dba83 1500 temp64.val = pci_map_single(h->pdev, buff,
7c832835
BH
1501 iocommand.buf_size,
1502 PCI_DMA_BIDIRECTIONAL);
1503 c->SG[0].Addr.lower = temp64.val32.lower;
1504 c->SG[0].Addr.upper = temp64.val32.upper;
1505 c->SG[0].Len = iocommand.buf_size;
b028461d 1506 c->SG[0].Ext = 0; /* we are not chaining */
7c832835
BH
1507 }
1508 c->waiting = &wait;
1509
f70dba83 1510 enqueue_cmd_and_start_io(h, c);
7c832835
BH
1511 wait_for_completion(&wait);
1512
1513 /* unlock the buffers from DMA */
1514 temp64.val32.lower = c->SG[0].Addr.lower;
1515 temp64.val32.upper = c->SG[0].Addr.upper;
f70dba83 1516 pci_unmap_single(h->pdev, (dma_addr_t) temp64.val,
7c832835
BH
1517 iocommand.buf_size,
1518 PCI_DMA_BIDIRECTIONAL);
1519
f70dba83 1520 check_ioctl_unit_attention(h, c);
0a9279cc 1521
7c832835
BH
1522 /* Copy the error information out */
1523 iocommand.error_info = *(c->err_info);
1524 if (copy_to_user
1525 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1526 kfree(buff);
f70dba83 1527 cmd_free(h, c, 0);
1da177e4
LT
1528 return -EFAULT;
1529 }
7c832835
BH
1530
1531 if (iocommand.Request.Type.Direction == XFER_READ) {
1532 /* Copy the data out of the buffer we created */
1533 if (copy_to_user
1534 (iocommand.buf, buff, iocommand.buf_size)) {
1535 kfree(buff);
f70dba83 1536 cmd_free(h, c, 0);
7c832835
BH
1537 return -EFAULT;
1538 }
1539 }
1540 kfree(buff);
f70dba83 1541 cmd_free(h, c, 0);
7c832835 1542 return 0;
1da177e4 1543 }
7c832835
BH
1544 case CCISS_BIG_PASSTHRU:{
1545 BIG_IOCTL_Command_struct *ioc;
1546 CommandList_struct *c;
1547 unsigned char **buff = NULL;
1548 int *buff_size = NULL;
1549 u64bit temp64;
7c832835
BH
1550 BYTE sg_used = 0;
1551 int status = 0;
1552 int i;
6e9a4738 1553 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH
1554 __u32 left;
1555 __u32 sz;
1556 BYTE __user *data_ptr;
1557
1558 if (!arg)
1559 return -EINVAL;
1560 if (!capable(CAP_SYS_RAWIO))
1561 return -EPERM;
1562 ioc = (BIG_IOCTL_Command_struct *)
1563 kmalloc(sizeof(*ioc), GFP_KERNEL);
1564 if (!ioc) {
1565 status = -ENOMEM;
1566 goto cleanup1;
1567 }
1568 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1569 status = -EFAULT;
1570 goto cleanup1;
1571 }
1572 if ((ioc->buf_size < 1) &&
1573 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT
1574 status = -EINVAL;
1575 goto cleanup1;
7c832835
BH
1576 }
1577 /* Check kmalloc limits using all SGs */
1578 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1579 status = -EINVAL;
1580 goto cleanup1;
1581 }
1582 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1583 status = -EINVAL;
1584 goto cleanup1;
1585 }
1586 buff =
1587 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1588 if (!buff) {
1da177e4
LT
1589 status = -ENOMEM;
1590 goto cleanup1;
1591 }
5cbded58 1592 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH
1593 GFP_KERNEL);
1594 if (!buff_size) {
1595 status = -ENOMEM;
1596 goto cleanup1;
1597 }
1598 left = ioc->buf_size;
1599 data_ptr = ioc->buf;
1600 while (left) {
1601 sz = (left >
1602 ioc->malloc_size) ? ioc->
1603 malloc_size : left;
1604 buff_size[sg_used] = sz;
1605 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1606 if (buff[sg_used] == NULL) {
1da177e4 1607 status = -ENOMEM;
15534d38
JA
1608 goto cleanup1;
1609 }
7c832835
BH
1610 if (ioc->Request.Type.Direction == XFER_WRITE) {
1611 if (copy_from_user
1612 (buff[sg_used], data_ptr, sz)) {
f7108f91 1613 status = -EFAULT;
7c832835
BH
1614 goto cleanup1;
1615 }
1616 } else {
1617 memset(buff[sg_used], 0, sz);
1618 }
1619 left -= sz;
1620 data_ptr += sz;
1621 sg_used++;
1622 }
f70dba83
SC
1623 c = cmd_alloc(h, 0);
1624 if (!c) {
7c832835
BH
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 =
f70dba83 1645 pci_map_single(h->pdev, buff[i],
7c832835
BH
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;
f70dba83 1657 enqueue_cmd_and_start_io(h, 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;
f70dba83 1663 pci_unmap_single(h->pdev,
7c832835 1664 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1665 PCI_DMA_BIDIRECTIONAL);
1da177e4 1666 }
f70dba83 1667 check_ioctl_unit_attention(h, 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))) {
f70dba83 1671 cmd_free(h, c, 0);
7c832835
BH
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])) {
f70dba83 1681 cmd_free(h, c, 0);
7c832835
BH
1682 status = -EFAULT;
1683 goto cleanup1;
1684 }
1685 ptr += buff_size[i];
1da177e4 1686 }
1da177e4 1687 }
f70dba83 1688 cmd_free(h, c, 0);
7c832835
BH
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{
f70dba83
SC
1776 CommandList_struct *c = rq->completion_data;
1777 ctlr_info_t *h = hba[c->ctlr];
1778 SGDescriptor_struct *curr_sg = c->SG;
ca1e0484 1779 u64bit temp64;
664a717d 1780 unsigned long flags;
ca1e0484 1781 int i, ddir;
5c07a311 1782 int sg_index = 0;
ca1e0484 1783
f70dba83 1784 if (c->Request.Type.Direction == XFER_READ)
ca1e0484
MM
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 */
f70dba83 1791 for (i = 0; i < c->Header.SGList; i++) {
5c07a311 1792 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
f70dba83 1793 cciss_unmap_sg_chain_block(h, c);
5c07a311 1794 /* Point to the next block */
f70dba83 1795 curr_sg = h->cmd_sg_list[c->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)
f70dba83 1811 rq->resid_len = c->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);
f70dba83 1816 cmd_free(h, c, 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 */
f70dba83 1832static void cciss_get_device_descr(ctlr_info_t *h, 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
f70dba83
SC
1847 log_unit_to_scsi3addr(h, scsi3addr, logvol);
1848 rc = sendcmd_withirq(h, CISS_INQUIRY, inq_buf, sizeof(*inq_buf), 0,
7b838bde 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 */
f70dba83 1868static void cciss_get_serial_no(ctlr_info_t *h, 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);
f70dba83
SC
1883 log_unit_to_scsi3addr(h, scsi3addr, logvol);
1884 rc = sendcmd_withirq(h, CISS_INQUIRY, buf,
7b838bde 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 */
f70dba83
SC
1950static void cciss_update_drive_info(ctlr_info_t *h, int drv_index,
1951 int first_time, int via_ioctl)
7c832835 1952{
ddd47442 1953 struct gendisk *disk;
ddd47442
MM
1954 InquiryData_struct *inq_buff = NULL;
1955 unsigned int block_size;
00988a35 1956 sector_t total_size;
ddd47442
MM
1957 unsigned long flags = 0;
1958 int ret = 0;
a72da29b
MM
1959 drive_info_struct *drvinfo;
1960
1961 /* Get information about the disk and modify the driver structure */
1962 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1963 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM
1964 if (inq_buff == NULL || drvinfo == NULL)
1965 goto mem_msg;
1966
1967 /* testing to see if 16-byte CDBs are already being used */
1968 if (h->cciss_read == CCISS_READ_16) {
f70dba83 1969 cciss_read_capacity_16(h, drv_index,
a72da29b
MM
1970 &total_size, &block_size);
1971
1972 } else {
f70dba83 1973 cciss_read_capacity(h, drv_index, &total_size, &block_size);
a72da29b
MM
1974 /* if read_capacity returns all F's this volume is >2TB */
1975 /* in size so we switch to 16-byte CDB's for all */
1976 /* read/write ops */
1977 if (total_size == 0xFFFFFFFFULL) {
f70dba83 1978 cciss_read_capacity_16(h, drv_index,
a72da29b
MM
1979 &total_size, &block_size);
1980 h->cciss_read = CCISS_READ_16;
1981 h->cciss_write = CCISS_WRITE_16;
1982 } else {
1983 h->cciss_read = CCISS_READ_10;
1984 h->cciss_write = CCISS_WRITE_10;
1985 }
1986 }
1987
f70dba83 1988 cciss_geometry_inquiry(h, drv_index, total_size, block_size,
a72da29b
MM
1989 inq_buff, drvinfo);
1990 drvinfo->block_size = block_size;
1991 drvinfo->nr_blocks = total_size + 1;
1992
f70dba83 1993 cciss_get_device_descr(h, drv_index, drvinfo->vendor,
7fe06326 1994 drvinfo->model, drvinfo->rev);
f70dba83 1995 cciss_get_serial_no(h, drv_index, drvinfo->serial_no,
a72da29b 1996 sizeof(drvinfo->serial_no));
9cef0d2f
SC
1997 /* Save the lunid in case we deregister the disk, below. */
1998 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1999 sizeof(drvinfo->LunID));
a72da29b
MM
2000
2001 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 2002 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 2003 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC
2004 h->drv[drv_index]->serial_no, 16) == 0) &&
2005 drvinfo->block_size == h->drv[drv_index]->block_size &&
2006 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
2007 drvinfo->heads == h->drv[drv_index]->heads &&
2008 drvinfo->sectors == h->drv[drv_index]->sectors &&
2009 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM
2010 /* The disk is unchanged, nothing to update */
2011 goto freeret;
a72da29b 2012
6ae5ce8e
MM
2013 /* If we get here it's not the same disk, or something's changed,
2014 * so we need to * deregister it, and re-register it, if it's not
2015 * in use.
2016 * If the disk already exists then deregister it before proceeding
2017 * (unless it's the first disk (for the controller node).
2018 */
9cef0d2f 2019 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 2020 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
f70dba83 2021 spin_lock_irqsave(&h->lock, flags);
9cef0d2f 2022 h->drv[drv_index]->busy_configuring = 1;
f70dba83 2023 spin_unlock_irqrestore(&h->lock, flags);
e14ac670 2024
9cef0d2f 2025 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM
2026 * which keeps the interrupt handler from starting
2027 * the queue.
2028 */
2d11d993 2029 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM
2030 }
2031
2032 /* If the disk is in use return */
2033 if (ret)
a72da29b
MM
2034 goto freeret;
2035
6ae5ce8e 2036 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC
2037 * and serial number inquiry. If the disk was deregistered
2038 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 2039 */
9cef0d2f
SC
2040 if (h->drv[drv_index] == NULL) {
2041 drvinfo->device_initialized = 0;
2042 h->drv[drv_index] = drvinfo;
2043 drvinfo = NULL; /* so it won't be freed below. */
2044 } else {
2045 /* special case for cxd0 */
2046 h->drv[drv_index]->block_size = drvinfo->block_size;
2047 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2048 h->drv[drv_index]->heads = drvinfo->heads;
2049 h->drv[drv_index]->sectors = drvinfo->sectors;
2050 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2051 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2052 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2053 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2054 VENDOR_LEN + 1);
2055 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2056 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2057 }
ddd47442
MM
2058
2059 ++h->num_luns;
2060 disk = h->gendisk[drv_index];
9cef0d2f 2061 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 2062
6ae5ce8e
MM
2063 /* If it's not disk 0 (drv_index != 0)
2064 * or if it was disk 0, but there was previously
2065 * no actual corresponding configured logical drive
2066 * (raid_leve == -1) then we want to update the
2067 * logical drive's information.
2068 */
361e9b07
SC
2069 if (drv_index || first_time) {
2070 if (cciss_add_disk(h, disk, drv_index) != 0) {
2071 cciss_free_gendisk(h, drv_index);
9cef0d2f 2072 cciss_free_drive_info(h, drv_index);
361e9b07
SC
2073 printk(KERN_WARNING "cciss:%d could not update "
2074 "disk %d\n", h->ctlr, drv_index);
2075 --h->num_luns;
2076 }
2077 }
ddd47442 2078
6ae5ce8e 2079freeret:
ddd47442 2080 kfree(inq_buff);
a72da29b 2081 kfree(drvinfo);
ddd47442 2082 return;
6ae5ce8e 2083mem_msg:
ddd47442
MM
2084 printk(KERN_ERR "cciss: out of memory\n");
2085 goto freeret;
2086}
2087
2088/* This function will find the first index of the controllers drive array
9cef0d2f
SC
2089 * that has a null drv pointer and allocate the drive info struct and
2090 * will return that index This is where new drives will be added.
2091 * If the index to be returned is greater than the highest_lun index for
2092 * the controller then highest_lun is set * to this new index.
2093 * If there are no available indexes or if tha allocation fails, then -1
2094 * is returned. * "controller_node" is used to know if this is a real
2095 * logical drive, or just the controller node, which determines if this
2096 * counts towards highest_lun.
7c832835 2097 */
9cef0d2f 2098static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM
2099{
2100 int i;
9cef0d2f 2101 drive_info_struct *drv;
ddd47442 2102
9cef0d2f 2103 /* Search for an empty slot for our drive info */
7c832835 2104 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC
2105
2106 /* if not cxd0 case, and it's occupied, skip it. */
2107 if (h->drv[i] && i != 0)
2108 continue;
2109 /*
2110 * If it's cxd0 case, and drv is alloc'ed already, and a
2111 * disk is configured there, skip it.
2112 */
2113 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2114 continue;
2115
2116 /*
2117 * We've found an empty slot. Update highest_lun
2118 * provided this isn't just the fake cxd0 controller node.
2119 */
2120 if (i > h->highest_lun && !controller_node)
2121 h->highest_lun = i;
2122
2123 /* If adding a real disk at cxd0, and it's already alloc'ed */
2124 if (i == 0 && h->drv[i] != NULL)
ddd47442 2125 return i;
9cef0d2f
SC
2126
2127 /*
2128 * Found an empty slot, not already alloc'ed. Allocate it.
2129 * Mark it with raid_level == -1, so we know it's new later on.
2130 */
2131 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2132 if (!drv)
2133 return -1;
2134 drv->raid_level = -1; /* so we know it's new */
2135 h->drv[i] = drv;
2136 return i;
ddd47442
MM
2137 }
2138 return -1;
2139}
2140
9cef0d2f
SC
2141static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2142{
2143 kfree(h->drv[drv_index]);
2144 h->drv[drv_index] = NULL;
2145}
2146
361e9b07
SC
2147static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2148{
2149 put_disk(h->gendisk[drv_index]);
2150 h->gendisk[drv_index] = NULL;
2151}
2152
6ae5ce8e
MM
2153/* cciss_add_gendisk finds a free hba[]->drv structure
2154 * and allocates a gendisk if needed, and sets the lunid
2155 * in the drvinfo structure. It returns the index into
2156 * the ->drv[] array, or -1 if none are free.
2157 * is_controller_node indicates whether highest_lun should
2158 * count this disk, or if it's only being added to provide
2159 * a means to talk to the controller in case no logical
2160 * drives have yet been configured.
2161 */
39ccf9a6
SC
2162static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2163 int controller_node)
6ae5ce8e
MM
2164{
2165 int drv_index;
2166
9cef0d2f 2167 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM
2168 if (drv_index == -1)
2169 return -1;
8ce51966 2170
6ae5ce8e
MM
2171 /*Check if the gendisk needs to be allocated */
2172 if (!h->gendisk[drv_index]) {
2173 h->gendisk[drv_index] =
2174 alloc_disk(1 << NWD_SHIFT);
2175 if (!h->gendisk[drv_index]) {
2176 printk(KERN_ERR "cciss%d: could not "
2177 "allocate a new disk %d\n",
2178 h->ctlr, drv_index);
9cef0d2f 2179 goto err_free_drive_info;
6ae5ce8e
MM
2180 }
2181 }
9cef0d2f
SC
2182 memcpy(h->drv[drv_index]->LunID, lunid,
2183 sizeof(h->drv[drv_index]->LunID));
2184 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2185 goto err_free_disk;
6ae5ce8e
MM
2186 /* Don't need to mark this busy because nobody */
2187 /* else knows about this disk yet to contend */
2188 /* for access to it. */
9cef0d2f 2189 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM
2190 wmb();
2191 return drv_index;
7fe06326
AP
2192
2193err_free_disk:
361e9b07 2194 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC
2195err_free_drive_info:
2196 cciss_free_drive_info(h, drv_index);
7fe06326 2197 return -1;
6ae5ce8e
MM
2198}
2199
2200/* This is for the special case of a controller which
2201 * has no logical drives. In this case, we still need
2202 * to register a disk so the controller can be accessed
2203 * by the Array Config Utility.
2204 */
2205static void cciss_add_controller_node(ctlr_info_t *h)
2206{
2207 struct gendisk *disk;
2208 int drv_index;
2209
2210 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2211 return;
2212
39ccf9a6 2213 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC
2214 if (drv_index == -1)
2215 goto error;
9cef0d2f
SC
2216 h->drv[drv_index]->block_size = 512;
2217 h->drv[drv_index]->nr_blocks = 0;
2218 h->drv[drv_index]->heads = 0;
2219 h->drv[drv_index]->sectors = 0;
2220 h->drv[drv_index]->cylinders = 0;
2221 h->drv[drv_index]->raid_level = -1;
2222 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2223 disk = h->gendisk[drv_index];
361e9b07
SC
2224 if (cciss_add_disk(h, disk, drv_index) == 0)
2225 return;
2226 cciss_free_gendisk(h, drv_index);
9cef0d2f 2227 cciss_free_drive_info(h, drv_index);
361e9b07
SC
2228error:
2229 printk(KERN_WARNING "cciss%d: could not "
2230 "add disk 0.\n", h->ctlr);
2231 return;
6ae5ce8e
MM
2232}
2233
ddd47442 2234/* This function will add and remove logical drives from the Logical
d14c4ab5 2235 * drive array of the controller and maintain persistency of ordering
ddd47442
MM
2236 * so that mount points are preserved until the next reboot. This allows
2237 * for the removal of logical drives in the middle of the drive array
2238 * without a re-ordering of those drives.
2239 * INPUT
2240 * h = The controller to perform the operations on
7c832835 2241 */
2d11d993
SC
2242static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2243 int via_ioctl)
1da177e4 2244{
ddd47442
MM
2245 int num_luns;
2246 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM
2247 int return_code;
2248 int listlength = 0;
2249 int i;
2250 int drv_found;
2251 int drv_index = 0;
39ccf9a6 2252 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2253 unsigned long flags;
ddd47442 2254
6ae5ce8e
MM
2255 if (!capable(CAP_SYS_RAWIO))
2256 return -EPERM;
2257
ddd47442 2258 /* Set busy_configuring flag for this operation */
f70dba83 2259 spin_lock_irqsave(&h->lock, flags);
7c832835 2260 if (h->busy_configuring) {
f70dba83 2261 spin_unlock_irqrestore(&h->lock, flags);
ddd47442
MM
2262 return -EBUSY;
2263 }
2264 h->busy_configuring = 1;
f70dba83 2265 spin_unlock_irqrestore(&h->lock, flags);
ddd47442 2266
a72da29b
MM
2267 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2268 if (ld_buff == NULL)
2269 goto mem_msg;
2270
f70dba83 2271 return_code = sendcmd_withirq(h, CISS_REPORT_LOG, ld_buff,
b57695fe 2272 sizeof(ReportLunData_struct),
2273 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2274
a72da29b
MM
2275 if (return_code == IO_OK)
2276 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2277 else { /* reading number of logical volumes failed */
2278 printk(KERN_WARNING "cciss: report logical volume"
2279 " command failed\n");
2280 listlength = 0;
2281 goto freeret;
2282 }
2283
2284 num_luns = listlength / 8; /* 8 bytes per entry */
2285 if (num_luns > CISS_MAX_LUN) {
2286 num_luns = CISS_MAX_LUN;
2287 printk(KERN_WARNING "cciss: more luns configured"
2288 " on controller than can be handled by"
2289 " this driver.\n");
2290 }
2291
6ae5ce8e
MM
2292 if (num_luns == 0)
2293 cciss_add_controller_node(h);
2294
2295 /* Compare controller drive array to driver's drive array
2296 * to see if any drives are missing on the controller due
2297 * to action of Array Config Utility (user deletes drive)
2298 * and deregister logical drives which have disappeared.
2299 */
a72da29b
MM
2300 for (i = 0; i <= h->highest_lun; i++) {
2301 int j;
2302 drv_found = 0;
d8a0be6a
SC
2303
2304 /* skip holes in the array from already deleted drives */
9cef0d2f 2305 if (h->drv[i] == NULL)
d8a0be6a
SC
2306 continue;
2307
a72da29b 2308 for (j = 0; j < num_luns; j++) {
39ccf9a6 2309 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2310 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2311 sizeof(lunid)) == 0) {
a72da29b
MM
2312 drv_found = 1;
2313 break;
2314 }
2315 }
2316 if (!drv_found) {
2317 /* Deregister it from the OS, it's gone. */
f70dba83 2318 spin_lock_irqsave(&h->lock, flags);
9cef0d2f 2319 h->drv[i]->busy_configuring = 1;
f70dba83 2320 spin_unlock_irqrestore(&h->lock, flags);
2d11d993 2321 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC
2322 if (h->drv[i] != NULL)
2323 h->drv[i]->busy_configuring = 0;
ddd47442 2324 }
a72da29b 2325 }
ddd47442 2326
a72da29b
MM
2327 /* Compare controller drive array to driver's drive array.
2328 * Check for updates in the drive information and any new drives
2329 * on the controller due to ACU adding logical drives, or changing
2330 * a logical drive's size, etc. Reregister any new/changed drives
2331 */
2332 for (i = 0; i < num_luns; i++) {
2333 int j;
ddd47442 2334
a72da29b 2335 drv_found = 0;
ddd47442 2336
39ccf9a6 2337 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM
2338 /* Find if the LUN is already in the drive array
2339 * of the driver. If so then update its info
2340 * if not in use. If it does not exist then find
2341 * the first free index and add it.
2342 */
2343 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC
2344 if (h->drv[j] != NULL &&
2345 memcmp(h->drv[j]->LunID, lunid,
2346 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM
2347 drv_index = j;
2348 drv_found = 1;
2349 break;
ddd47442 2350 }
a72da29b 2351 }
ddd47442 2352
a72da29b
MM
2353 /* check if the drive was found already in the array */
2354 if (!drv_found) {
eece695f 2355 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM
2356 if (drv_index == -1)
2357 goto freeret;
a72da29b 2358 }
f70dba83 2359 cciss_update_drive_info(h, drv_index, first_time, via_ioctl);
a72da29b 2360 } /* end for */
ddd47442 2361
6ae5ce8e 2362freeret:
ddd47442
MM
2363 kfree(ld_buff);
2364 h->busy_configuring = 0;
2365 /* We return -1 here to tell the ACU that we have registered/updated
2366 * all of the drives that we can and to keep it from calling us
2367 * additional times.
7c832835 2368 */
ddd47442 2369 return -1;
6ae5ce8e 2370mem_msg:
ddd47442 2371 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2372 h->busy_configuring = 0;
ddd47442
MM
2373 goto freeret;
2374}
2375
9ddb27b4
SC
2376static void cciss_clear_drive_info(drive_info_struct *drive_info)
2377{
2378 /* zero out the disk size info */
2379 drive_info->nr_blocks = 0;
2380 drive_info->block_size = 0;
2381 drive_info->heads = 0;
2382 drive_info->sectors = 0;
2383 drive_info->cylinders = 0;
2384 drive_info->raid_level = -1;
2385 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2386 memset(drive_info->model, 0, sizeof(drive_info->model));
2387 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2388 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2389 /*
2390 * don't clear the LUNID though, we need to remember which
2391 * one this one is.
2392 */
2393}
2394
ddd47442
MM
2395/* This function will deregister the disk and it's queue from the
2396 * kernel. It must be called with the controller lock held and the
2397 * drv structures busy_configuring flag set. It's parameters are:
2398 *
2399 * disk = This is the disk to be deregistered
2400 * drv = This is the drive_info_struct associated with the disk to be
2401 * deregistered. It contains information about the disk used
2402 * by the driver.
2403 * clear_all = This flag determines whether or not the disk information
2404 * is going to be completely cleared out and the highest_lun
2405 * reset. Sometimes we want to clear out information about
d14c4ab5 2406 * the disk in preparation for re-adding it. In this case
ddd47442
MM
2407 * the highest_lun should be left unchanged and the LunID
2408 * should not be cleared.
2d11d993
SC
2409 * via_ioctl
2410 * This indicates whether we've reached this path via ioctl.
2411 * This affects the maximum usage count allowed for c0d0 to be messed with.
2412 * If this path is reached via ioctl(), then the max_usage_count will
2413 * be 1, as the process calling ioctl() has got to have the device open.
2414 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2415*/
a0ea8622 2416static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2417 int clear_all, int via_ioctl)
ddd47442 2418{
799202cb 2419 int i;
a0ea8622
SC
2420 struct gendisk *disk;
2421 drive_info_struct *drv;
9cef0d2f 2422 int recalculate_highest_lun;
1da177e4
LT
2423
2424 if (!capable(CAP_SYS_RAWIO))
2425 return -EPERM;
2426
9cef0d2f 2427 drv = h->drv[drv_index];
a0ea8622
SC
2428 disk = h->gendisk[drv_index];
2429
1da177e4 2430 /* make sure logical volume is NOT is use */
7c832835 2431 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2432 if (drv->usage_count > via_ioctl)
7c832835
BH
2433 return -EBUSY;
2434 } else if (drv->usage_count > 0)
2435 return -EBUSY;
1da177e4 2436
9cef0d2f
SC
2437 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2438
ddd47442
MM
2439 /* invalidate the devices and deregister the disk. If it is disk
2440 * zero do not deregister it but just zero out it's values. This
2441 * allows us to delete disk zero but keep the controller registered.
7c832835
BH
2442 */
2443 if (h->gendisk[0] != disk) {
5a9df732 2444 struct request_queue *q = disk->queue;
097d0264 2445 if (disk->flags & GENHD_FL_UP) {
8ce51966 2446 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2447 del_gendisk(disk);
5a9df732 2448 }
9cef0d2f 2449 if (q)
5a9df732 2450 blk_cleanup_queue(q);
5a9df732
AB
2451 /* If clear_all is set then we are deleting the logical
2452 * drive, not just refreshing its info. For drives
2453 * other than disk 0 we will call put_disk. We do not
2454 * do this for disk 0 as we need it to be able to
2455 * configure the controller.
a72da29b 2456 */
5a9df732
AB
2457 if (clear_all){
2458 /* This isn't pretty, but we need to find the
2459 * disk in our array and NULL our the pointer.
2460 * This is so that we will call alloc_disk if
2461 * this index is used again later.
a72da29b 2462 */
5a9df732 2463 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2464 if (h->gendisk[i] == disk) {
5a9df732
AB
2465 h->gendisk[i] = NULL;
2466 break;
799202cb 2467 }
799202cb 2468 }
5a9df732 2469 put_disk(disk);
ddd47442 2470 }
799202cb
MM
2471 } else {
2472 set_capacity(disk, 0);
9cef0d2f 2473 cciss_clear_drive_info(drv);
ddd47442
MM
2474 }
2475
2476 --h->num_luns;
ddd47442 2477
9cef0d2f
SC
2478 /* if it was the last disk, find the new hightest lun */
2479 if (clear_all && recalculate_highest_lun) {
c2d45b4d 2480 int newhighest = -1;
9cef0d2f
SC
2481 for (i = 0; i <= h->highest_lun; i++) {
2482 /* if the disk has size > 0, it is available */
2483 if (h->drv[i] && h->drv[i]->heads)
2484 newhighest = i;
1da177e4 2485 }
9cef0d2f 2486 h->highest_lun = newhighest;
ddd47442 2487 }
e2019b58 2488 return 0;
1da177e4 2489}
ddd47442 2490
f70dba83 2491static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
b57695fe 2492 size_t size, __u8 page_code, unsigned char *scsi3addr,
2493 int cmd_type)
1da177e4 2494{
1da177e4
LT
2495 u64bit buff_dma_handle;
2496 int status = IO_OK;
2497
2498 c->cmd_type = CMD_IOCTL_PEND;
2499 c->Header.ReplyQueue = 0;
7c832835 2500 if (buff != NULL) {
1da177e4 2501 c->Header.SGList = 1;
7c832835 2502 c->Header.SGTotal = 1;
1da177e4
LT
2503 } else {
2504 c->Header.SGList = 0;
7c832835 2505 c->Header.SGTotal = 0;
1da177e4
LT
2506 }
2507 c->Header.Tag.lower = c->busaddr;
b57695fe 2508 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT
2509
2510 c->Request.Type.Type = cmd_type;
2511 if (cmd_type == TYPE_CMD) {
7c832835
BH
2512 switch (cmd) {
2513 case CISS_INQUIRY:
1da177e4 2514 /* are we trying to read a vital product page */
7c832835 2515 if (page_code != 0) {
1da177e4
LT
2516 c->Request.CDB[1] = 0x01;
2517 c->Request.CDB[2] = page_code;
2518 }
2519 c->Request.CDBLen = 6;
7c832835 2520 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT
2521 c->Request.Type.Direction = XFER_READ;
2522 c->Request.Timeout = 0;
7c832835
BH
2523 c->Request.CDB[0] = CISS_INQUIRY;
2524 c->Request.CDB[4] = size & 0xFF;
2525 break;
1da177e4
LT
2526 case CISS_REPORT_LOG:
2527 case CISS_REPORT_PHYS:
7c832835 2528 /* Talking to controller so It's a physical command
1da177e4 2529 mode = 00 target = 0. Nothing to write.
7c832835 2530 */
1da177e4
LT
2531 c->Request.CDBLen = 12;
2532 c->Request.Type.Attribute = ATTR_SIMPLE;
2533 c->Request.Type.Direction = XFER_READ;
2534 c->Request.Timeout = 0;
2535 c->Request.CDB[0] = cmd;
b028461d 2536 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
1da177e4
LT
2537 c->Request.CDB[7] = (size >> 16) & 0xFF;
2538 c->Request.CDB[8] = (size >> 8) & 0xFF;
2539 c->Request.CDB[9] = size & 0xFF;
2540 break;
2541
2542 case CCISS_READ_CAPACITY:
1da177e4
LT
2543 c->Request.CDBLen = 10;
2544 c->Request.Type.Attribute = ATTR_SIMPLE;
2545 c->Request.Type.Direction = XFER_READ;
2546 c->Request.Timeout = 0;
2547 c->Request.CDB[0] = cmd;
7c832835 2548 break;
00988a35 2549 case CCISS_READ_CAPACITY_16:
00988a35
MMOD
2550 c->Request.CDBLen = 16;
2551 c->Request.Type.Attribute = ATTR_SIMPLE;
2552 c->Request.Type.Direction = XFER_READ;
2553 c->Request.Timeout = 0;
2554 c->Request.CDB[0] = cmd;
2555 c->Request.CDB[1] = 0x10;
2556 c->Request.CDB[10] = (size >> 24) & 0xFF;
2557 c->Request.CDB[11] = (size >> 16) & 0xFF;
2558 c->Request.CDB[12] = (size >> 8) & 0xFF;
2559 c->Request.CDB[13] = size & 0xFF;
2560 c->Request.Timeout = 0;
2561 c->Request.CDB[0] = cmd;
2562 break;
1da177e4
LT
2563 case CCISS_CACHE_FLUSH:
2564 c->Request.CDBLen = 12;
2565 c->Request.Type.Attribute = ATTR_SIMPLE;
2566 c->Request.Type.Direction = XFER_WRITE;
2567 c->Request.Timeout = 0;
2568 c->Request.CDB[0] = BMIC_WRITE;
2569 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2570 break;
88f627ae 2571 case TEST_UNIT_READY:
88f627ae
SC
2572 c->Request.CDBLen = 6;
2573 c->Request.Type.Attribute = ATTR_SIMPLE;
2574 c->Request.Type.Direction = XFER_NONE;
2575 c->Request.Timeout = 0;
2576 break;
1da177e4
LT
2577 default:
2578 printk(KERN_WARNING
f70dba83
SC
2579 "cciss%d: Unknown Command 0x%c\n",
2580 h->ctlr, cmd);
e2019b58 2581 return IO_ERROR;
1da177e4
LT
2582 }
2583 } else if (cmd_type == TYPE_MSG) {
2584 switch (cmd) {
7c832835 2585 case 0: /* ABORT message */
3da8b713 2586 c->Request.CDBLen = 12;
2587 c->Request.Type.Attribute = ATTR_SIMPLE;
2588 c->Request.Type.Direction = XFER_WRITE;
2589 c->Request.Timeout = 0;
7c832835
BH
2590 c->Request.CDB[0] = cmd; /* abort */
2591 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2592 /* buff contains the tag of the command to abort */
2593 memcpy(&c->Request.CDB[4], buff, 8);
2594 break;
7c832835 2595 case 1: /* RESET message */
88f627ae 2596 c->Request.CDBLen = 16;
3da8b713 2597 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2598 c->Request.Type.Direction = XFER_NONE;
3da8b713 2599 c->Request.Timeout = 0;
2600 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2601 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2602 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2603 break;
1da177e4
LT
2604 case 3: /* No-Op message */
2605 c->Request.CDBLen = 1;
2606 c->Request.Type.Attribute = ATTR_SIMPLE;
2607 c->Request.Type.Direction = XFER_WRITE;
2608 c->Request.Timeout = 0;
2609 c->Request.CDB[0] = cmd;
2610 break;
2611 default:
2612 printk(KERN_WARNING
f70dba83
SC
2613 "cciss%d: unknown message type %d\n",
2614 h->ctlr, cmd);
1da177e4
LT
2615 return IO_ERROR;
2616 }
2617 } else {
2618 printk(KERN_WARNING
f70dba83 2619 "cciss%d: unknown command type %d\n", h->ctlr, cmd_type);
1da177e4
LT
2620 return IO_ERROR;
2621 }
2622 /* Fill in the scatter gather information */
2623 if (size > 0) {
2624 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH
2625 buff, size,
2626 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT
2627 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2628 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2629 c->SG[0].Len = size;
7c832835 2630 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT
2631 }
2632 return status;
2633}
7c832835 2634
3c2ab402 2635static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2636{
2637 switch (c->err_info->ScsiStatus) {
2638 case SAM_STAT_GOOD:
2639 return IO_OK;
2640 case SAM_STAT_CHECK_CONDITION:
2641 switch (0xf & c->err_info->SenseInfo[2]) {
2642 case 0: return IO_OK; /* no sense */
2643 case 1: return IO_OK; /* recovered error */
2644 default:
c08fac65
SC
2645 if (check_for_unit_attention(h, c))
2646 return IO_NEEDS_RETRY;
3c2ab402 2647 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2648 "check condition, sense key = 0x%02x\n",
2649 h->ctlr, c->Request.CDB[0],
2650 c->err_info->SenseInfo[2]);
2651 }
2652 break;
2653 default:
2654 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2655 "scsi status = 0x%02x\n", h->ctlr,
2656 c->Request.CDB[0], c->err_info->ScsiStatus);
2657 break;
2658 }
2659 return IO_ERROR;
2660}
2661
789a424a 2662static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2663{
5390cfc3 2664 int return_status = IO_OK;
7c832835 2665
789a424a 2666 if (c->err_info->CommandStatus == CMD_SUCCESS)
2667 return IO_OK;
5390cfc3 2668
2669 switch (c->err_info->CommandStatus) {
2670 case CMD_TARGET_STATUS:
3c2ab402 2671 return_status = check_target_status(h, c);
5390cfc3 2672 break;
2673 case CMD_DATA_UNDERRUN:
2674 case CMD_DATA_OVERRUN:
2675 /* expected for inquiry and report lun commands */
2676 break;
2677 case CMD_INVALID:
789a424a 2678 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2679 "reported invalid\n", c->Request.CDB[0]);
2680 return_status = IO_ERROR;
2681 break;
2682 case CMD_PROTOCOL_ERR:
2683 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2684 "protocol error \n", c->Request.CDB[0]);
2685 return_status = IO_ERROR;
2686 break;
2687 case CMD_HARDWARE_ERR:
2688 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2689 " hardware error\n", c->Request.CDB[0]);
2690 return_status = IO_ERROR;
2691 break;
2692 case CMD_CONNECTION_LOST:
2693 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2694 "connection lost\n", c->Request.CDB[0]);
2695 return_status = IO_ERROR;
2696 break;
2697 case CMD_ABORTED:
2698 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2699 "aborted\n", c->Request.CDB[0]);
2700 return_status = IO_ERROR;
2701 break;
2702 case CMD_ABORT_FAILED:
2703 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2704 "abort failed\n", c->Request.CDB[0]);
2705 return_status = IO_ERROR;
2706 break;
2707 case CMD_UNSOLICITED_ABORT:
2708 printk(KERN_WARNING
2709 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2710 c->Request.CDB[0]);
789a424a 2711 return_status = IO_NEEDS_RETRY;
5390cfc3 2712 break;
2713 default:
2714 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2715 "unknown status %x\n", c->Request.CDB[0],
2716 c->err_info->CommandStatus);
2717 return_status = IO_ERROR;
7c832835 2718 }
789a424a 2719 return return_status;
2720}
2721
2722static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2723 int attempt_retry)
2724{
2725 DECLARE_COMPLETION_ONSTACK(wait);
2726 u64bit buff_dma_handle;
789a424a 2727 int return_status = IO_OK;
2728
2729resend_cmd2:
2730 c->waiting = &wait;
664a717d 2731 enqueue_cmd_and_start_io(h, c);
789a424a 2732
2733 wait_for_completion(&wait);
2734
2735 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2736 goto command_done;
2737
2738 return_status = process_sendcmd_error(h, c);
2739
2740 if (return_status == IO_NEEDS_RETRY &&
2741 c->retry_count < MAX_CMD_RETRIES) {
2742 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2743 c->Request.CDB[0]);
2744 c->retry_count++;
2745 /* erase the old error information */
2746 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2747 return_status = IO_OK;
2748 INIT_COMPLETION(wait);
2749 goto resend_cmd2;
2750 }
5390cfc3 2751
2752command_done:
1da177e4 2753 /* unlock the buffers from DMA */
bb2a37bf
MM
2754 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2755 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH
2756 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2757 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2758 return return_status;
2759}
2760
f70dba83 2761static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
b57695fe 2762 __u8 page_code, unsigned char scsi3addr[],
2763 int cmd_type)
5390cfc3 2764{
5390cfc3 2765 CommandList_struct *c;
2766 int return_status;
2767
2768 c = cmd_alloc(h, 0);
2769 if (!c)
2770 return -ENOMEM;
f70dba83 2771 return_status = fill_cmd(h, c, cmd, buff, size, page_code,
b57695fe 2772 scsi3addr, cmd_type);
5390cfc3 2773 if (return_status == IO_OK)
789a424a 2774 return_status = sendcmd_withirq_core(h, c, 1);
2775
1da177e4 2776 cmd_free(h, c, 0);
7c832835 2777 return return_status;
1da177e4 2778}
7c832835 2779
f70dba83 2780static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
7b838bde 2781 sector_t total_size,
7c832835
BH
2782 unsigned int block_size,
2783 InquiryData_struct *inq_buff,
2784 drive_info_struct *drv)
1da177e4
LT
2785{
2786 int return_code;
00988a35 2787 unsigned long t;
b57695fe 2788 unsigned char scsi3addr[8];
00988a35 2789
1da177e4 2790 memset(inq_buff, 0, sizeof(InquiryData_struct));
f70dba83
SC
2791 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2792 return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff,
7b838bde 2793 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2794 if (return_code == IO_OK) {
7c832835 2795 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2796 printk(KERN_WARNING
7c832835
BH
2797 "cciss: reading geometry failed, volume "
2798 "does not support reading geometry\n");
1da177e4 2799 drv->heads = 255;
b028461d 2800 drv->sectors = 32; /* Sectors per track */
7f42d3b8 2801 drv->cylinders = total_size + 1;
89f97ad1 2802 drv->raid_level = RAID_UNKNOWN;
1da177e4 2803 } else {
1da177e4
LT
2804 drv->heads = inq_buff->data_byte[6];
2805 drv->sectors = inq_buff->data_byte[7];
2806 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2807 drv->cylinders += inq_buff->data_byte[5];
2808 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW
2809 }
2810 drv->block_size = block_size;
97c06978 2811 drv->nr_blocks = total_size + 1;
3f7705ea
MW
2812 t = drv->heads * drv->sectors;
2813 if (t > 1) {
97c06978
MMOD
2814 sector_t real_size = total_size + 1;
2815 unsigned long rem = sector_div(real_size, t);
3f7705ea 2816 if (rem)
97c06978
MMOD
2817 real_size++;
2818 drv->cylinders = real_size;
1da177e4 2819 }
7c832835 2820 } else { /* Get geometry failed */
1da177e4
LT
2821 printk(KERN_WARNING "cciss: reading geometry failed\n");
2822 }
1da177e4 2823}
7c832835 2824
1da177e4 2825static void
f70dba83 2826cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size,
7c832835 2827 unsigned int *block_size)
1da177e4 2828{
00988a35 2829 ReadCapdata_struct *buf;
1da177e4 2830 int return_code;
b57695fe 2831 unsigned char scsi3addr[8];
1aebe187
MK
2832
2833 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2834 if (!buf) {
00988a35
MMOD
2835 printk(KERN_WARNING "cciss: out of memory\n");
2836 return;
2837 }
1aebe187 2838
f70dba83
SC
2839 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2840 return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY, buf,
7b838bde 2841 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2842 if (return_code == IO_OK) {
4c1f2b31
AV
2843 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2844 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2845 } else { /* read capacity command failed */
1da177e4
LT
2846 printk(KERN_WARNING "cciss: read capacity failed\n");
2847 *total_size = 0;
2848 *block_size = BLOCK_SIZE;
2849 }
00988a35 2850 kfree(buf);
00988a35
MMOD
2851}
2852
f70dba83 2853static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
7b838bde 2854 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD
2855{
2856 ReadCapdata_struct_16 *buf;
2857 int return_code;
b57695fe 2858 unsigned char scsi3addr[8];
1aebe187
MK
2859
2860 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2861 if (!buf) {
00988a35
MMOD
2862 printk(KERN_WARNING "cciss: out of memory\n");
2863 return;
2864 }
1aebe187 2865
f70dba83
SC
2866 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2867 return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY_16,
2868 buf, sizeof(ReadCapdata_struct_16),
7b838bde 2869 0, scsi3addr, TYPE_CMD);
00988a35 2870 if (return_code == IO_OK) {
4c1f2b31
AV
2871 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2872 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD
2873 } else { /* read capacity command failed */
2874 printk(KERN_WARNING "cciss: read capacity failed\n");
2875 *total_size = 0;
2876 *block_size = BLOCK_SIZE;
2877 }
7b92aadf 2878 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2879 (unsigned long long)*total_size+1, *block_size);
00988a35 2880 kfree(buf);
1da177e4
LT
2881}
2882
1da177e4
LT
2883static int cciss_revalidate(struct gendisk *disk)
2884{
2885 ctlr_info_t *h = get_host(disk);
2886 drive_info_struct *drv = get_drv(disk);
2887 int logvol;
7c832835 2888 int FOUND = 0;
1da177e4 2889 unsigned int block_size;
00988a35 2890 sector_t total_size;
1da177e4
LT
2891 InquiryData_struct *inq_buff = NULL;
2892
7c832835 2893 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2894 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2895 sizeof(drv->LunID)) == 0) {
7c832835 2896 FOUND = 1;
1da177e4
LT
2897 break;
2898 }
2899 }
2900
7c832835
BH
2901 if (!FOUND)
2902 return 1;
1da177e4 2903
7c832835
BH
2904 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2905 if (inq_buff == NULL) {
2906 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH
2907 return 1;
2908 }
00988a35 2909 if (h->cciss_read == CCISS_READ_10) {
f70dba83 2910 cciss_read_capacity(h, logvol,
00988a35
MMOD
2911 &total_size, &block_size);
2912 } else {
f70dba83 2913 cciss_read_capacity_16(h, logvol,
00988a35
MMOD
2914 &total_size, &block_size);
2915 }
f70dba83 2916 cciss_geometry_inquiry(h, logvol, total_size, block_size,
7c832835 2917 inq_buff, drv);
1da177e4 2918
e1defc4f 2919 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT
2920 set_capacity(disk, drv->nr_blocks);
2921
1da177e4
LT
2922 kfree(inq_buff);
2923 return 0;
2924}
2925
1da177e4
LT
2926/*
2927 * Map (physical) PCI mem into (virtual) kernel space
2928 */
2929static void __iomem *remap_pci_mem(ulong base, ulong size)
2930{
7c832835
BH
2931 ulong page_base = ((ulong) base) & PAGE_MASK;
2932 ulong page_offs = ((ulong) base) - page_base;
2933 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2934
7c832835 2935 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT
2936}
2937
7c832835
BH
2938/*
2939 * Takes jobs of the Q and sends them to the hardware, then puts it on
2940 * the Q to wait for completion.
2941 */
2942static void start_io(ctlr_info_t *h)
1da177e4
LT
2943{
2944 CommandList_struct *c;
7c832835 2945
8a3173de
JA
2946 while (!hlist_empty(&h->reqQ)) {
2947 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT
2948 /* can't do anything if fifo is full */
2949 if ((h->access.fifo_full(h))) {
2950 printk(KERN_WARNING "cciss: fifo full\n");
2951 break;
2952 }
2953
7c832835 2954 /* Get the first entry from the Request Q */
8a3173de 2955 removeQ(c);
1da177e4 2956 h->Qdepth--;
7c832835
BH
2957
2958 /* Tell the controller execute command */
1da177e4 2959 h->access.submit_command(h, c);
7c832835
BH
2960
2961 /* Put job onto the completed Q */
8a3173de 2962 addQ(&h->cmpQ, c);
1da177e4
LT
2963 }
2964}
7c832835 2965
f70dba83 2966/* Assumes that h->lock is held. */
1da177e4
LT
2967/* Zeros out the error record and then resends the command back */
2968/* to the controller */
7c832835 2969static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT
2970{
2971 /* erase the old error information */
2972 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2973
2974 /* add it to software queue and then send it to the controller */
8a3173de 2975 addQ(&h->reqQ, c);
1da177e4 2976 h->Qdepth++;
7c832835 2977 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT
2978 h->maxQsinceinit = h->Qdepth;
2979
2980 start_io(h);
2981}
a9925a06 2982
1a614f50
SC
2983static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2984 unsigned int msg_byte, unsigned int host_byte,
2985 unsigned int driver_byte)
2986{
2987 /* inverse of macros in scsi.h */
2988 return (scsi_status_byte & 0xff) |
2989 ((msg_byte & 0xff) << 8) |
2990 ((host_byte & 0xff) << 16) |
2991 ((driver_byte & 0xff) << 24);
2992}
2993
0a9279cc
MM
2994static inline int evaluate_target_status(ctlr_info_t *h,
2995 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD
2996{
2997 unsigned char sense_key;
1a614f50
SC
2998 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2999 int error_value;
3000
0a9279cc 3001 *retry_cmd = 0;
1a614f50
SC
3002 /* If we get in here, it means we got "target status", that is, scsi status */
3003 status_byte = cmd->err_info->ScsiStatus;
3004 driver_byte = DRIVER_OK;
3005 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3006
33659ebb 3007 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
1a614f50
SC
3008 host_byte = DID_PASSTHROUGH;
3009 else
3010 host_byte = DID_OK;
3011
3012 error_value = make_status_bytes(status_byte, msg_byte,
3013 host_byte, driver_byte);
03bbfee5 3014
1a614f50 3015 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
33659ebb 3016 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
03bbfee5
MMOD
3017 printk(KERN_WARNING "cciss: cmd %p "
3018 "has SCSI Status 0x%x\n",
3019 cmd, cmd->err_info->ScsiStatus);
1a614f50 3020 return error_value;
03bbfee5
MMOD
3021 }
3022
3023 /* check the sense key */
3024 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3025 /* no status or recovered error */
33659ebb
CH
3026 if (((sense_key == 0x0) || (sense_key == 0x1)) &&
3027 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
1a614f50 3028 error_value = 0;
03bbfee5 3029
0a9279cc 3030 if (check_for_unit_attention(h, cmd)) {
33659ebb 3031 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
0a9279cc
MM
3032 return 0;
3033 }
3034
33659ebb
CH
3035 /* Not SG_IO or similar? */
3036 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
1a614f50 3037 if (error_value != 0)
03bbfee5
MMOD
3038 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3039 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3040 return error_value;
03bbfee5
MMOD
3041 }
3042
3043 /* SG_IO or similar, copy sense data back */
3044 if (cmd->rq->sense) {
3045 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3046 cmd->rq->sense_len = cmd->err_info->SenseLen;
3047 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3048 cmd->rq->sense_len);
3049 } else
3050 cmd->rq->sense_len = 0;
3051
1a614f50 3052 return error_value;
03bbfee5
MMOD
3053}
3054
7c832835 3055/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA
3056 * buffers for the completed job. Note that this function does not need
3057 * to hold the hba/queue lock.
7c832835
BH
3058 */
3059static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3060 int timeout)
1da177e4 3061{
1da177e4 3062 int retry_cmd = 0;
198b7660
MMOD
3063 struct request *rq = cmd->rq;
3064
3065 rq->errors = 0;
7c832835 3066
1da177e4 3067 if (timeout)
1a614f50 3068 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3069
d38ae168
MMOD
3070 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3071 goto after_error_processing;
7c832835 3072
d38ae168 3073 switch (cmd->err_info->CommandStatus) {
d38ae168 3074 case CMD_TARGET_STATUS:
0a9279cc 3075 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD
3076 break;
3077 case CMD_DATA_UNDERRUN:
33659ebb 3078 if (cmd->rq->cmd_type == REQ_TYPE_FS) {
03bbfee5
MMOD
3079 printk(KERN_WARNING "cciss: cmd %p has"
3080 " completed with data underrun "
3081 "reported\n", cmd);
c3a4d78c 3082 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3083 }
d38ae168
MMOD
3084 break;
3085 case CMD_DATA_OVERRUN:
33659ebb 3086 if (cmd->rq->cmd_type == REQ_TYPE_FS)
03bbfee5
MMOD
3087 printk(KERN_WARNING "cciss: cmd %p has"
3088 " completed with data overrun "
3089 "reported\n", cmd);
d38ae168
MMOD
3090 break;
3091 case CMD_INVALID:
3092 printk(KERN_WARNING "cciss: cmd %p is "
3093 "reported invalid\n", cmd);
1a614f50
SC
3094 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3095 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3096 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3097 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD
3098 break;
3099 case CMD_PROTOCOL_ERR:
3100 printk(KERN_WARNING "cciss: cmd %p has "
3101 "protocol error \n", cmd);
1a614f50
SC
3102 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3103 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3104 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3105 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD
3106 break;
3107 case CMD_HARDWARE_ERR:
3108 printk(KERN_WARNING "cciss: cmd %p had "
3109 " hardware error\n", cmd);
1a614f50
SC
3110 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3111 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3112 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3113 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD
3114 break;
3115 case CMD_CONNECTION_LOST:
3116 printk(KERN_WARNING "cciss: cmd %p had "
3117 "connection lost\n", cmd);
1a614f50
SC
3118 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3119 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3120 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3121 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD
3122 break;
3123 case CMD_ABORTED:
3124 printk(KERN_WARNING "cciss: cmd %p was "
3125 "aborted\n", cmd);
1a614f50
SC
3126 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3127 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3128 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3129 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD
3130 break;
3131 case CMD_ABORT_FAILED:
3132 printk(KERN_WARNING "cciss: cmd %p reports "
3133 "abort failed\n", cmd);
1a614f50
SC
3134 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3135 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3136 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3137 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD
3138 break;
3139 case CMD_UNSOLICITED_ABORT:
3140 printk(KERN_WARNING "cciss%d: unsolicited "
3141 "abort %p\n", h->ctlr, cmd);
3142 if (cmd->retry_count < MAX_CMD_RETRIES) {
3143 retry_cmd = 1;
3144 printk(KERN_WARNING
3145 "cciss%d: retrying %p\n", h->ctlr, cmd);
3146 cmd->retry_count++;
3147 } else
3148 printk(KERN_WARNING
3149 "cciss%d: %p retried too "
3150 "many times\n", h->ctlr, cmd);
1a614f50
SC
3151 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3152 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3153 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3154 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD
3155 break;
3156 case CMD_TIMEOUT:
3157 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC
3158 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3159 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3160 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3161 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD
3162 break;
3163 default:
3164 printk(KERN_WARNING "cciss: cmd %p returned "
3165 "unknown status %x\n", cmd,
3166 cmd->err_info->CommandStatus);
1a614f50
SC
3167 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3168 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH
3169 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3170 DID_PASSTHROUGH : DID_ERROR);
1da177e4 3171 }
d38ae168
MMOD
3172
3173after_error_processing:
3174
1da177e4 3175 /* We need to return this command */
7c832835
BH
3176 if (retry_cmd) {
3177 resend_cciss_cmd(h, cmd);
1da177e4 3178 return;
7c832835 3179 }
03bbfee5 3180 cmd->rq->completion_data = cmd;
a9925a06 3181 blk_complete_request(cmd->rq);
1da177e4
LT
3182}
3183
0c2b3908
MM
3184static inline u32 cciss_tag_contains_index(u32 tag)
3185{
5e216153 3186#define DIRECT_LOOKUP_BIT 0x10
0c2b3908
MM
3187 return tag & DIRECT_LOOKUP_BIT;
3188}
3189
3190static inline u32 cciss_tag_to_index(u32 tag)
3191{
5e216153 3192#define DIRECT_LOOKUP_SHIFT 5
0c2b3908
MM
3193 return tag >> DIRECT_LOOKUP_SHIFT;
3194}
3195
3196static inline u32 cciss_tag_discard_error_bits(u32 tag)
3197{
3198#define CCISS_ERROR_BITS 0x03
3199 return tag & ~CCISS_ERROR_BITS;
3200}
3201
3202static inline void cciss_mark_tag_indexed(u32 *tag)
3203{
3204 *tag |= DIRECT_LOOKUP_BIT;
3205}
3206
3207static inline void cciss_set_tag_index(u32 *tag, u32 index)
3208{
3209 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3210}
3211
7c832835
BH
3212/*
3213 * Get a request and submit it to the controller.
1da177e4 3214 */
165125e1 3215static void do_cciss_request(struct request_queue *q)
1da177e4 3216{
7c832835 3217 ctlr_info_t *h = q->queuedata;
1da177e4 3218 CommandList_struct *c;
00988a35
MMOD
3219 sector_t start_blk;
3220 int seg;
1da177e4
LT
3221 struct request *creq;
3222 u64bit temp64;
5c07a311
DB
3223 struct scatterlist *tmp_sg;
3224 SGDescriptor_struct *curr_sg;
1da177e4
LT
3225 drive_info_struct *drv;
3226 int i, dir;
5c07a311
DB
3227 int sg_index = 0;
3228 int chained = 0;
1da177e4
LT
3229
3230 /* We call start_io here in case there is a command waiting on the
3231 * queue that has not been sent.
7c832835 3232 */
1da177e4
LT
3233 if (blk_queue_plugged(q))
3234 goto startio;
3235
7c832835 3236 queue:
9934c8c0 3237 creq = blk_peek_request(q);
1da177e4
LT
3238 if (!creq)
3239 goto startio;
3240
5c07a311 3241 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
1da177e4 3242
7c832835 3243 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT
3244 goto full;
3245
9934c8c0 3246 blk_start_request(creq);
1da177e4 3247
5c07a311 3248 tmp_sg = h->scatter_list[c->cmdindex];
1da177e4
LT
3249 spin_unlock_irq(q->queue_lock);
3250
3251 c->cmd_type = CMD_RWREQ;
3252 c->rq = creq;
7c832835
BH
3253
3254 /* fill in the request */
1da177e4 3255 drv = creq->rq_disk->private_data;
b028461d 3256 c->Header.ReplyQueue = 0; /* unused in simple mode */
33079b21
MM
3257 /* got command from pool, so use the command block index instead */
3258 /* for direct lookups. */
3259 /* The first 2 bits are reserved for controller error reporting. */
0c2b3908
MM
3260 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3261 cciss_mark_tag_indexed(&c->Header.Tag.lower);
39ccf9a6 3262 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
b028461d 3263 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3264 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
7c832835
BH
3265 c->Request.Type.Attribute = ATTR_SIMPLE;
3266 c->Request.Type.Direction =
a52de245 3267 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
b028461d 3268 c->Request.Timeout = 0; /* Don't time out */
7c832835 3269 c->Request.CDB[0] =
00988a35 3270 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3271 start_blk = blk_rq_pos(creq);
1da177e4 3272#ifdef CCISS_DEBUG
83096ebf
TH
3273 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3274 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3275#endif /* CCISS_DEBUG */
1da177e4 3276
5c07a311 3277 sg_init_table(tmp_sg, h->maxsgentries);
1da177e4
LT
3278 seg = blk_rq_map_sg(q, creq, tmp_sg);
3279
7c832835 3280 /* get the DMA records for the setup */
1da177e4
LT
3281 if (c->Request.Type.Direction == XFER_READ)
3282 dir = PCI_DMA_FROMDEVICE;
3283 else
3284 dir = PCI_DMA_TODEVICE;
3285
5c07a311
DB
3286 curr_sg = c->SG;
3287 sg_index = 0;
3288 chained = 0;
3289
7c832835 3290 for (i = 0; i < seg; i++) {
5c07a311
DB
3291 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3292 !chained && ((seg - i) > 1)) {
5c07a311 3293 /* Point to next chain block. */
dccc9b56 3294 curr_sg = h->cmd_sg_list[c->cmdindex];
5c07a311
DB
3295 sg_index = 0;
3296 chained = 1;
3297 }
3298 curr_sg[sg_index].Len = tmp_sg[i].length;
45711f1a 3299 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
5c07a311
DB
3300 tmp_sg[i].offset,
3301 tmp_sg[i].length, dir);
3302 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3303 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3304 curr_sg[sg_index].Ext = 0; /* we are not chaining */
5c07a311 3305 ++sg_index;
1da177e4 3306 }
d45033ef
SC
3307 if (chained)
3308 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3309 (seg - (h->max_cmd_sgentries - 1)) *
3310 sizeof(SGDescriptor_struct));
5c07a311 3311
7c832835
BH
3312 /* track how many SG entries we are using */
3313 if (seg > h->maxSG)
3314 h->maxSG = seg;
1da177e4
LT
3315
3316#ifdef CCISS_DEBUG
5c07a311
DB
3317 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3318 "chained[%d]\n",
3319 blk_rq_sectors(creq), seg, chained);
7c832835 3320#endif /* CCISS_DEBUG */
1da177e4 3321
5e216153
MM
3322 c->Header.SGTotal = seg + chained;
3323 if (seg <= h->max_cmd_sgentries)
3324 c->Header.SGList = c->Header.SGTotal;
3325 else
5c07a311 3326 c->Header.SGList = h->max_cmd_sgentries;
5e216153 3327 set_performant_mode(h, c);
5c07a311 3328
33659ebb 3329 if (likely(creq->cmd_type == REQ_TYPE_FS)) {
03bbfee5
MMOD
3330 if(h->cciss_read == CCISS_READ_10) {
3331 c->Request.CDB[1] = 0;
b028461d 3332 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
03bbfee5
MMOD
3333 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3334 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3335 c->Request.CDB[5] = start_blk & 0xff;
b028461d 3336 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
83096ebf
TH
3337 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3338 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD
3339 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3340 } else {
582539e5
RD
3341 u32 upper32 = upper_32_bits(start_blk);
3342
03bbfee5
MMOD
3343 c->Request.CDBLen = 16;
3344 c->Request.CDB[1]= 0;
b028461d 3345 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
582539e5
RD
3346 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3347 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3348 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD
3349 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3350 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3351 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3352 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH
3353 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3354 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3355 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3356 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD
3357 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3358 }
33659ebb 3359 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
03bbfee5
MMOD
3360 c->Request.CDBLen = creq->cmd_len;
3361 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3362 } else {
03bbfee5
MMOD
3363 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3364 BUG();
00988a35 3365 }
1da177e4
LT
3366
3367 spin_lock_irq(q->queue_lock);
3368
8a3173de 3369 addQ(&h->reqQ, c);
1da177e4 3370 h->Qdepth++;
7c832835
BH
3371 if (h->Qdepth > h->maxQsinceinit)
3372 h->maxQsinceinit = h->Qdepth;
1da177e4
LT
3373
3374 goto queue;
00988a35 3375full:
1da177e4 3376 blk_stop_queue(q);
00988a35 3377startio:
1da177e4
LT
3378 /* We will already have the driver lock here so not need
3379 * to lock it.
7c832835 3380 */
1da177e4
LT
3381 start_io(h);
3382}
3383
3da8b713 3384static inline unsigned long get_next_completion(ctlr_info_t *h)
3385{
3da8b713 3386 return h->access.command_completed(h);
3da8b713 3387}
3388
3389static inline int interrupt_pending(ctlr_info_t *h)
3390{
3da8b713 3391 return h->access.intr_pending(h);
3da8b713 3392}
3393
3394static inline long interrupt_not_for_us(ctlr_info_t *h)
3395{
2cf3af1c
MM
3396 return !(h->msi_vector || h->msix_vector) &&
3397 ((h->access.intr_pending(h) == 0) ||
3398 (h->interrupts_enabled == 0));
3da8b713 3399}
3400
0c2b3908
MM
3401static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3402 u32 raw_tag)
1da177e4 3403{
0c2b3908
MM
3404 if (unlikely(tag_index >= h->nr_cmds)) {
3405 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3406 return 1;
3407 }
3408 return 0;
3409}
3410
3411static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3412 u32 raw_tag)
3413{
3414 removeQ(c);
3415 if (likely(c->cmd_type == CMD_RWREQ))
3416 complete_command(h, c, 0);
3417 else if (c->cmd_type == CMD_IOCTL_PEND)
3418 complete(c->waiting);
3419#ifdef CONFIG_CISS_SCSI_TAPE
3420 else if (c->cmd_type == CMD_SCSI)
3421 complete_scsi_command(c, 0, raw_tag);
3422#endif
3423}
3424
29979a71
MM
3425static inline u32 next_command(ctlr_info_t *h)
3426{
3427 u32 a;
3428
3429 if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
3430 return h->access.command_completed(h);
3431
3432 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
3433 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
3434 (h->reply_pool_head)++;
3435 h->commands_outstanding--;
3436 } else {
3437 a = FIFO_EMPTY;
3438 }
3439 /* Check for wraparound */
3440 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
3441 h->reply_pool_head = h->reply_pool;
3442 h->reply_pool_wraparound ^= 1;
3443 }
3444 return a;
3445}
3446
0c2b3908
MM
3447/* process completion of an indexed ("direct lookup") command */
3448static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3449{
3450 u32 tag_index;
1da177e4 3451 CommandList_struct *c;
0c2b3908
MM
3452
3453 tag_index = cciss_tag_to_index(raw_tag);
3454 if (bad_tag(h, tag_index, raw_tag))
5e216153 3455 return next_command(h);
0c2b3908
MM
3456 c = h->cmd_pool + tag_index;
3457 finish_cmd(h, c, raw_tag);
5e216153 3458 return next_command(h);
0c2b3908
MM
3459}
3460
3461/* process completion of a non-indexed command */
3462static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3463{
3464 u32 tag;
3465 CommandList_struct *c = NULL;
3466 struct hlist_node *tmp;
3467 __u32 busaddr_masked, tag_masked;
3468
3469 tag = cciss_tag_discard_error_bits(raw_tag);
3470 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3471 busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
3472 tag_masked = cciss_tag_discard_error_bits(tag);
3473 if (busaddr_masked == tag_masked) {
3474 finish_cmd(h, c, raw_tag);
5e216153 3475 return next_command(h);
0c2b3908
MM
3476 }
3477 }
3478 bad_tag(h, h->nr_cmds + 1, raw_tag);
5e216153 3479 return next_command(h);
0c2b3908
MM
3480}
3481
3482static irqreturn_t do_cciss_intx(int irq, void *dev_id)
3483{
3484 ctlr_info_t *h = dev_id;
1da177e4 3485 unsigned long flags;
0c2b3908 3486 u32 raw_tag;
1da177e4 3487
3da8b713 3488 if (interrupt_not_for_us(h))
1da177e4 3489 return IRQ_NONE;
1da177e4
LT
3490 /*
3491 * If there are completed commands in the completion queue,
3492 * we had better do something about it.
3493 */
f70dba83 3494 spin_lock_irqsave(&h->lock, flags);
3da8b713 3495 while (interrupt_pending(h)) {
0c2b3908
MM
3496 raw_tag = get_next_completion(h);
3497 while (raw_tag != FIFO_EMPTY) {
3498 if (cciss_tag_contains_index(raw_tag))
3499 raw_tag = process_indexed_cmd(h, raw_tag);
3500 else
3501 raw_tag = process_nonindexed_cmd(h, raw_tag);
3502 }
3503 }
33079b21 3504
f70dba83 3505 spin_unlock_irqrestore(&h->lock, flags);
0c2b3908
MM
3506 return IRQ_HANDLED;
3507}
33079b21 3508
0c2b3908
MM
3509/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3510 * check the interrupt pending register because it is not set.
3511 */
3512static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3513{
3514 ctlr_info_t *h = dev_id;
3515 unsigned long flags;
3516 u32 raw_tag;
8a3173de 3517
0c2b3908
MM
3518 if (interrupt_not_for_us(h))
3519 return IRQ_NONE;
3520 /*
3521 * If there are completed commands in the completion queue,
3522 * we had better do something about it.
3523 */
f70dba83 3524 spin_lock_irqsave(&h->lock, flags);
0c2b3908
MM
3525 raw_tag = get_next_completion(h);
3526 while (raw_tag != FIFO_EMPTY) {
3527 if (cciss_tag_contains_index(raw_tag))
3528 raw_tag = process_indexed_cmd(h, raw_tag);
3529 else
3530 raw_tag = process_nonindexed_cmd(h, raw_tag);
1da177e4
LT
3531 }
3532
f70dba83 3533 spin_unlock_irqrestore(&h->lock, flags);
1da177e4
LT
3534 return IRQ_HANDLED;
3535}
7c832835 3536
b368c9dd
AP
3537/**
3538 * add_to_scan_list() - add controller to rescan queue
3539 * @h: Pointer to the controller.
3540 *
3541 * Adds the controller to the rescan queue if not already on the queue.
3542 *
3543 * returns 1 if added to the queue, 0 if skipped (could be on the
3544 * queue already, or the controller could be initializing or shutting
3545 * down).
3546 **/
3547static int add_to_scan_list(struct ctlr_info *h)
3548{
3549 struct ctlr_info *test_h;
3550 int found = 0;
3551 int ret = 0;
3552
3553 if (h->busy_initializing)
3554 return 0;
3555
3556 if (!mutex_trylock(&h->busy_shutting_down))
3557 return 0;
3558
3559 mutex_lock(&scan_mutex);
3560 list_for_each_entry(test_h, &scan_q, scan_list) {
3561 if (test_h == h) {
3562 found = 1;
3563 break;
3564 }
3565 }
3566 if (!found && !h->busy_scanning) {
3567 INIT_COMPLETION(h->scan_wait);
3568 list_add_tail(&h->scan_list, &scan_q);
3569 ret = 1;
3570 }
3571 mutex_unlock(&scan_mutex);
3572 mutex_unlock(&h->busy_shutting_down);
3573
3574 return ret;
3575}
3576
3577/**
3578 * remove_from_scan_list() - remove controller from rescan queue
3579 * @h: Pointer to the controller.
3580 *
3581 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC
3582 * the controller is currently conducting a rescan. The controller
3583 * can be in one of three states:
3584 * 1. Doesn't need a scan
3585 * 2. On the scan list, but not scanning yet (we remove it)
3586 * 3. Busy scanning (and not on the list). In this case we want to wait for
3587 * the scan to complete to make sure the scanning thread for this
3588 * controller is completely idle.
b368c9dd
AP
3589 **/
3590static void remove_from_scan_list(struct ctlr_info *h)
3591{
3592 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP
3593
3594 mutex_lock(&scan_mutex);
3595 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3596 if (test_h == h) { /* state 2. */
b368c9dd
AP
3597 list_del(&h->scan_list);
3598 complete_all(&h->scan_wait);
3599 mutex_unlock(&scan_mutex);
3600 return;
3601 }
3602 }
fd8489cf
SC
3603 if (h->busy_scanning) { /* state 3. */
3604 mutex_unlock(&scan_mutex);
b368c9dd 3605 wait_for_completion(&h->scan_wait);
fd8489cf
SC
3606 } else { /* state 1, nothing to do. */
3607 mutex_unlock(&scan_mutex);
3608 }
b368c9dd
AP
3609}
3610
3611/**
3612 * scan_thread() - kernel thread used to rescan controllers
3613 * @data: Ignored.
3614 *
3615 * A kernel thread used scan for drive topology changes on
3616 * controllers. The thread processes only one controller at a time
3617 * using a queue. Controllers are added to the queue using
3618 * add_to_scan_list() and removed from the queue either after done
3619 * processing or using remove_from_scan_list().
3620 *
3621 * returns 0.
3622 **/
0a9279cc
MM
3623static int scan_thread(void *data)
3624{
b368c9dd 3625 struct ctlr_info *h;
0a9279cc 3626
b368c9dd
AP
3627 while (1) {
3628 set_current_state(TASK_INTERRUPTIBLE);
3629 schedule();
0a9279cc
MM
3630 if (kthread_should_stop())
3631 break;
b368c9dd
AP
3632
3633 while (1) {
3634 mutex_lock(&scan_mutex);
3635 if (list_empty(&scan_q)) {
3636 mutex_unlock(&scan_mutex);
3637 break;
3638 }
3639
3640 h = list_entry(scan_q.next,
3641 struct ctlr_info,
3642 scan_list);
3643 list_del(&h->scan_list);
3644 h->busy_scanning = 1;
3645 mutex_unlock(&scan_mutex);
3646
d06dfbd2
SC
3647 rebuild_lun_table(h, 0, 0);
3648 complete_all(&h->scan_wait);
3649 mutex_lock(&scan_mutex);
3650 h->busy_scanning = 0;
3651 mutex_unlock(&scan_mutex);
b368c9dd 3652 }
0a9279cc 3653 }
b368c9dd 3654
0a9279cc
MM
3655 return 0;
3656}
3657
3658static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3659{
3660 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3661 return 0;
3662
3663 switch (c->err_info->SenseInfo[12]) {
3664 case STATE_CHANGED:
3665 printk(KERN_WARNING "cciss%d: a state change "
3666 "detected, command retried\n", h->ctlr);
3667 return 1;
3668 break;
3669 case LUN_FAILED:
3670 printk(KERN_WARNING "cciss%d: LUN failure "
3671 "detected, action required\n", h->ctlr);
3672 return 1;
3673 break;
3674 case REPORT_LUNS_CHANGED:
3675 printk(KERN_WARNING "cciss%d: report LUN data "
3676 "changed\n", h->ctlr);
da002184
SC
3677 /*
3678 * Here, we could call add_to_scan_list and wake up the scan thread,
3679 * except that it's quite likely that we will get more than one
3680 * REPORT_LUNS_CHANGED condition in quick succession, which means
3681 * that those which occur after the first one will likely happen
3682 * *during* the scan_thread's rescan. And the rescan code is not
3683 * robust enough to restart in the middle, undoing what it has already
3684 * done, and it's not clear that it's even possible to do this, since
3685 * part of what it does is notify the block layer, which starts
3686 * doing it's own i/o to read partition tables and so on, and the
3687 * driver doesn't have visibility to know what might need undoing.
3688 * In any event, if possible, it is horribly complicated to get right
3689 * so we just don't do it for now.
3690 *
3691 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3692 */
0a9279cc
MM
3693 return 1;
3694 break;
3695 case POWER_OR_RESET:
3696 printk(KERN_WARNING "cciss%d: a power on "
3697 "or device reset detected\n", h->ctlr);
3698 return 1;
3699 break;
3700 case UNIT_ATTENTION_CLEARED:
3701 printk(KERN_WARNING "cciss%d: unit attention "
3702 "cleared by another initiator\n", h->ctlr);
3703 return 1;
3704 break;
3705 default:
3706 printk(KERN_WARNING "cciss%d: unknown "
3707 "unit attention detected\n", h->ctlr);
3708 return 1;
3709 }
3710}
3711
7c832835 3712/*
d14c4ab5 3713 * We cannot read the structure directly, for portability we must use
1da177e4 3714 * the io functions.
7c832835 3715 * This is for debug only.
1da177e4 3716 */
7c832835 3717static void print_cfg_table(CfgTable_struct *tb)
1da177e4 3718{
ff5f58f0 3719#ifdef CCISS_DEBUG
1da177e4
LT
3720 int i;
3721 char temp_name[17];
3722
3723 printk("Controller Configuration information\n");
3724 printk("------------------------------------\n");
7c832835 3725 for (i = 0; i < 4; i++)
1da177e4 3726 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH
3727 temp_name[4] = '\0';
3728 printk(" Signature = %s\n", temp_name);
1da177e4 3729 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH
3730 printk(" Transport methods supported = 0x%x\n",
3731 readl(&(tb->TransportSupport)));
3732 printk(" Transport methods active = 0x%x\n",
3733 readl(&(tb->TransportActive)));
3734 printk(" Requested transport Method = 0x%x\n",
3735 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3736 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3737 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3738 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH
3739 readl(&(tb->HostWrite.CoalIntCount)));
3740 printk(" Max outstanding commands = 0x%d\n",
3741 readl(&(tb->CmdsOutMax)));
3742 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3743 for (i = 0; i < 16; i++)
1da177e4
LT
3744 temp_name[i] = readb(&(tb->ServerName[i]));
3745 temp_name[16] = '\0';
3746 printk(" Server Name = %s\n", temp_name);
7c832835 3747 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
7c832835 3748#endif /* CCISS_DEBUG */
ff5f58f0 3749}
1da177e4 3750
7c832835 3751static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT
3752{
3753 int i, offset, mem_type, bar_type;
7c832835 3754 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT
3755 return 0;
3756 offset = 0;
7c832835
BH
3757 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3758 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT
3759 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3760 offset += 4;
3761 else {
3762 mem_type = pci_resource_flags(pdev, i) &
7c832835 3763 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3764 switch (mem_type) {
7c832835
BH
3765 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3766 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3767 offset += 4; /* 32 bit */
3768 break;
3769 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3770 offset += 8;
3771 break;
3772 default: /* reserved in PCI 2.2 */
3773 printk(KERN_WARNING
3774 "Base address is invalid\n");
3775 return -1;
1da177e4
LT
3776 break;
3777 }
3778 }
7c832835
BH
3779 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3780 return i + 1;
1da177e4
LT
3781 }
3782 return -1;
3783}
3784
5e216153
MM
3785/* Fill in bucket_map[], given nsgs (the max number of
3786 * scatter gather elements supported) and bucket[],
3787 * which is an array of 8 integers. The bucket[] array
3788 * contains 8 different DMA transfer sizes (in 16
3789 * byte increments) which the controller uses to fetch
3790 * commands. This function fills in bucket_map[], which
3791 * maps a given number of scatter gather elements to one of
3792 * the 8 DMA transfer sizes. The point of it is to allow the
3793 * controller to only do as much DMA as needed to fetch the
3794 * command, with the DMA transfer size encoded in the lower
3795 * bits of the command address.
3796 */
3797static void calc_bucket_map(int bucket[], int num_buckets,
3798 int nsgs, int *bucket_map)
3799{
3800 int i, j, b, size;
3801
3802 /* even a command with 0 SGs requires 4 blocks */
3803#define MINIMUM_TRANSFER_BLOCKS 4
3804#define NUM_BUCKETS 8
3805 /* Note, bucket_map must have nsgs+1 entries. */
3806 for (i = 0; i <= nsgs; i++) {
3807 /* Compute size of a command with i SG entries */
3808 size = i + MINIMUM_TRANSFER_BLOCKS;
3809 b = num_buckets; /* Assume the biggest bucket */
3810 /* Find the bucket that is just big enough */
3811 for (j = 0; j < 8; j++) {
3812 if (bucket[j] >= size) {
3813 b = j;
3814 break;
3815 }
3816 }
3817 /* for a command with i SG entries, use bucket b. */
3818 bucket_map[i] = b;
3819 }
3820}
3821
0f8a6a1e
SC
3822static void __devinit cciss_wait_for_mode_change_ack(ctlr_info_t *h)
3823{
3824 int i;
3825
3826 /* under certain very rare conditions, this can take awhile.
3827 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3828 * as we enter this code.) */
3829 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3830 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3831 break;
3832 msleep(10);
3833 }
3834}
3835
b9933135
SC
3836static __devinit void cciss_enter_performant_mode(ctlr_info_t *h)
3837{
3838 /* This is a bit complicated. There are 8 registers on
3839 * the controller which we write to to tell it 8 different
3840 * sizes of commands which there may be. It's a way of
3841 * reducing the DMA done to fetch each command. Encoded into
3842 * each command's tag are 3 bits which communicate to the controller
3843 * which of the eight sizes that command fits within. The size of
3844 * each command depends on how many scatter gather entries there are.
3845 * Each SG entry requires 16 bytes. The eight registers are programmed
3846 * with the number of 16-byte blocks a command of that size requires.
3847 * The smallest command possible requires 5 such 16 byte blocks.
3848 * the largest command possible requires MAXSGENTRIES + 4 16-byte
3849 * blocks. Note, this only extends to the SG entries contained
3850 * within the command block, and does not extend to chained blocks
3851 * of SG elements. bft[] contains the eight values we write to
3852 * the registers. They are not evenly distributed, but have more
3853 * sizes for small commands, and fewer sizes for larger commands.
3854 */
5e216153 3855 __u32 trans_offset;
b9933135 3856 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
5e216153
MM
3857 /*
3858 * 5 = 1 s/g entry or 4k
3859 * 6 = 2 s/g entry or 8k
3860 * 8 = 4 s/g entry or 16k
3861 * 10 = 6 s/g entry or 24k
3862 */
5e216153 3863 unsigned long register_value;
5e216153
MM
3864 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
3865
5e216153
MM
3866 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3867
3868 /* Controller spec: zero out this buffer. */
3869 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
3870 h->reply_pool_head = h->reply_pool;
3871
3872 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3873 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
3874 h->blockFetchTable);
3875 writel(bft[0], &h->transtable->BlockFetch0);
3876 writel(bft[1], &h->transtable->BlockFetch1);
3877 writel(bft[2], &h->transtable->BlockFetch2);
3878 writel(bft[3], &h->transtable->BlockFetch3);
3879 writel(bft[4], &h->transtable->BlockFetch4);
3880 writel(bft[5], &h->transtable->BlockFetch5);
3881 writel(bft[6], &h->transtable->BlockFetch6);
3882 writel(bft[7], &h->transtable->BlockFetch7);
3883
3884 /* size of controller ring buffer */
3885 writel(h->max_commands, &h->transtable->RepQSize);
3886 writel(1, &h->transtable->RepQCount);
3887 writel(0, &h->transtable->RepQCtrAddrLow32);
3888 writel(0, &h->transtable->RepQCtrAddrHigh32);
3889 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3890 writel(0, &h->transtable->RepQAddr0High32);
3891 writel(CFGTBL_Trans_Performant,
3892 &(h->cfgtable->HostWrite.TransportRequest));
3893
5e216153 3894 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
0f8a6a1e 3895 cciss_wait_for_mode_change_ack(h);
5e216153 3896 register_value = readl(&(h->cfgtable->TransportActive));
b9933135 3897 if (!(register_value & CFGTBL_Trans_Performant))
5e216153
MM
3898 printk(KERN_WARNING "cciss: unable to get board into"
3899 " performant mode\n");
b9933135
SC
3900}
3901
3902static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
3903{
3904 __u32 trans_support;
3905
3906 dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n");
3907 /* Attempt to put controller into performant mode if supported */
3908 /* Does board support performant mode? */
3909 trans_support = readl(&(h->cfgtable->TransportSupport));
3910 if (!(trans_support & PERFORMANT_MODE))
3911 return;
3912
3913 printk(KERN_WARNING "cciss%d: Placing controller into "
3914 "performant mode\n", h->ctlr);
3915 /* Performant mode demands commands on a 32 byte boundary
3916 * pci_alloc_consistent aligns on page boundarys already.
3917 * Just need to check if divisible by 32
3918 */
3919 if ((sizeof(CommandList_struct) % 32) != 0) {
3920 printk(KERN_WARNING "%s %d %s\n",
3921 "cciss info: command size[",
3922 (int)sizeof(CommandList_struct),
3923 "] not divisible by 32, no performant mode..\n");
5e216153
MM
3924 return;
3925 }
3926
b9933135
SC
3927 /* Performant mode ring buffer and supporting data structures */
3928 h->reply_pool = (__u64 *)pci_alloc_consistent(
3929 h->pdev, h->max_commands * sizeof(__u64),
3930 &(h->reply_pool_dhandle));
3931
3932 /* Need a block fetch table for performant mode */
3933 h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
3934 sizeof(__u32)), GFP_KERNEL);
3935
3936 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
3937 goto clean_up;
3938
3939 cciss_enter_performant_mode(h);
3940
5e216153
MM
3941 /* Change the access methods to the performant access methods */
3942 h->access = SA5_performant_access;
b9933135 3943 h->transMethod = CFGTBL_Trans_Performant;
5e216153
MM
3944
3945 return;
3946clean_up:
3947 kfree(h->blockFetchTable);
3948 if (h->reply_pool)
3949 pci_free_consistent(h->pdev,
3950 h->max_commands * sizeof(__u64),
3951 h->reply_pool,
3952 h->reply_pool_dhandle);
3953 return;
3954
3955} /* cciss_put_controller_into_performant_mode */
3956
fb86a35b
MM
3957/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3958 * controllers that are capable. If not, we use IO-APIC mode.
3959 */
3960
f70dba83 3961static void __devinit cciss_interrupt_mode(ctlr_info_t *h)
fb86a35b
MM
3962{
3963#ifdef CONFIG_PCI_MSI
7c832835
BH
3964 int err;
3965 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3966 {0, 2}, {0, 3}
3967 };
fb86a35b
MM
3968
3969 /* Some boards advertise MSI but don't really support it */
f70dba83
SC
3970 if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
3971 (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
fb86a35b
MM
3972 goto default_int_mode;
3973
f70dba83
SC
3974 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
3975 err = pci_enable_msix(h->pdev, cciss_msix_entries, 4);
7c832835 3976 if (!err) {
f70dba83
SC
3977 h->intr[0] = cciss_msix_entries[0].vector;
3978 h->intr[1] = cciss_msix_entries[1].vector;
3979 h->intr[2] = cciss_msix_entries[2].vector;
3980 h->intr[3] = cciss_msix_entries[3].vector;
3981 h->msix_vector = 1;
7c832835
BH
3982 return;
3983 }
3984 if (err > 0) {
3985 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3986 "available\n", err);
1ecb9c0f 3987 goto default_int_mode;
7c832835
BH
3988 } else {
3989 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3990 err);
1ecb9c0f 3991 goto default_int_mode;
7c832835
BH
3992 }
3993 }
f70dba83
SC
3994 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
3995 if (!pci_enable_msi(h->pdev))
3996 h->msi_vector = 1;
3997 else
7c832835 3998 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835 3999 }
1ecb9c0f 4000default_int_mode:
7c832835 4001#endif /* CONFIG_PCI_MSI */
fb86a35b 4002 /* if we get here we're going to use the default interrupt mode */
f70dba83 4003 h->intr[PERF_MODE_INT] = h->pdev->irq;
fb86a35b
MM
4004 return;
4005}
4006
6539fa9b 4007static int __devinit cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
1da177e4 4008{
6539fa9b
SC
4009 int i;
4010 u32 subsystem_vendor_id, subsystem_device_id;
2ec24ff1 4011
6539fa9b
SC
4012 subsystem_vendor_id = pdev->subsystem_vendor;
4013 subsystem_device_id = pdev->subsystem_device;
4014 *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
4015 subsystem_vendor_id;
2ec24ff1
SC
4016
4017 for (i = 0; i < ARRAY_SIZE(products); i++) {
4018 /* Stand aside for hpsa driver on request */
4019 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
4020 return -ENODEV;
6539fa9b
SC
4021 if (*board_id == products[i].board_id)
4022 return i;
2ec24ff1 4023 }
6539fa9b
SC
4024 dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n",
4025 *board_id);
4026 return -ENODEV;
4027}
4028
dd9c426e
SC
4029static inline bool cciss_board_disabled(ctlr_info_t *h)
4030{
4031 u16 command;
4032
4033 (void) pci_read_config_word(h->pdev, PCI_COMMAND, &command);
4034 return ((command & PCI_COMMAND_MEMORY) == 0);
4035}
4036
d474830d
SC
4037static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
4038 unsigned long *memory_bar)
4039{
4040 int i;
4041
4042 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
4043 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
4044 /* addressing mode bits already removed */
4045 *memory_bar = pci_resource_start(pdev, i);
4046 dev_dbg(&pdev->dev, "memory BAR = %lx\n",
4047 *memory_bar);
4048 return 0;
4049 }
4050 dev_warn(&pdev->dev, "no memory BAR found\n");
4051 return -ENODEV;
4052}
4053
e99ba136
SC
4054static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h)
4055{
4056 int i;
4057 u32 scratchpad;
4058
4059 for (i = 0; i < CCISS_BOARD_READY_ITERATIONS; i++) {
4060 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
4061 if (scratchpad == CCISS_FIRMWARE_READY)
4062 return 0;
4063 msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS);
4064 }
4065 dev_warn(&h->pdev->dev, "board not ready, timed out.\n");
4066 return -ENODEV;
4067}
4068
8e93bf6d
SC
4069static int __devinit cciss_find_cfg_addrs(struct pci_dev *pdev,
4070 void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
4071 u64 *cfg_offset)
4072{
4073 *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
4074 *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
4075 *cfg_base_addr &= (u32) 0x0000ffff;
4076 *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
4077 if (*cfg_base_addr_index == -1) {
4078 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index, "
4079 "*cfg_base_addr = 0x%08x\n", *cfg_base_addr);
4080 return -ENODEV;
4081 }
4082 return 0;
4083}
4084
4809d098
SC
4085static int __devinit cciss_find_cfgtables(ctlr_info_t *h)
4086{
4087 u64 cfg_offset;
4088 u32 cfg_base_addr;
4089 u64 cfg_base_addr_index;
4090 u32 trans_offset;
8e93bf6d 4091 int rc;
4809d098 4092
8e93bf6d
SC
4093 rc = cciss_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
4094 &cfg_base_addr_index, &cfg_offset);
4095 if (rc)
4096 return rc;
4809d098 4097 h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
8e93bf6d 4098 cfg_base_addr_index) + cfg_offset, sizeof(h->cfgtable));
4809d098
SC
4099 if (!h->cfgtable)
4100 return -ENOMEM;
4101 /* Find performant mode table. */
8e93bf6d 4102 trans_offset = readl(&h->cfgtable->TransMethodOffset);
4809d098
SC
4103 h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
4104 cfg_base_addr_index)+cfg_offset+trans_offset,
4105 sizeof(*h->transtable));
4106 if (!h->transtable)
4107 return -ENOMEM;
4108 return 0;
4109}
4110
adfbc1ff
SC
4111static void __devinit cciss_get_max_perf_mode_cmds(struct ctlr_info *h)
4112{
4113 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
4114 if (h->max_commands < 16) {
4115 dev_warn(&h->pdev->dev, "Controller reports "
4116 "max supported commands of %d, an obvious lie. "
4117 "Using 16. Ensure that firmware is up to date.\n",
4118 h->max_commands);
4119 h->max_commands = 16;
4120 }
4121}
4122
afadbf4b
SC
4123/* Interrogate the hardware for some limits:
4124 * max commands, max SG elements without chaining, and with chaining,
4125 * SG chain block size, etc.
4126 */
4127static void __devinit cciss_find_board_params(ctlr_info_t *h)
4128{
adfbc1ff 4129 cciss_get_max_perf_mode_cmds(h);
afadbf4b
SC
4130 h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
4131 h->maxsgentries = readl(&(h->cfgtable->MaxSGElements));
4132 /*
4133 * Limit in-command s/g elements to 32 save dma'able memory.
4134 * Howvever spec says if 0, use 31
4135 */
4136 h->max_cmd_sgentries = 31;
4137 if (h->maxsgentries > 512) {
4138 h->max_cmd_sgentries = 32;
4139 h->chainsize = h->maxsgentries - h->max_cmd_sgentries + 1;
4140 h->maxsgentries--; /* save one for chain pointer */
4141 } else {
4142 h->maxsgentries = 31; /* default to traditional values */
4143 h->chainsize = 0;
4144 }
4145}
4146
501b92cd
SC
4147static inline bool CISS_signature_present(ctlr_info_t *h)
4148{
4149 if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
4150 (readb(&h->cfgtable->Signature[1]) != 'I') ||
4151 (readb(&h->cfgtable->Signature[2]) != 'S') ||
4152 (readb(&h->cfgtable->Signature[3]) != 'S')) {
4153 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
4154 return false;
4155 }
4156 return true;
4157}
4158
322e304c
SC
4159/* Need to enable prefetch in the SCSI core for 6400 in x86 */
4160static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h)
4161{
4162#ifdef CONFIG_X86
4163 u32 prefetch;
4164
4165 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
4166 prefetch |= 0x100;
4167 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
4168#endif
4169}
4170
bfd63ee5
SC
4171/* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result
4172 * in a prefetch beyond physical memory.
4173 */
4174static inline void cciss_p600_dma_prefetch_quirk(ctlr_info_t *h)
4175{
4176 u32 dma_prefetch;
4177 __u32 dma_refetch;
4178
4179 if (h->board_id != 0x3225103C)
4180 return;
4181 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
4182 dma_prefetch |= 0x8000;
4183 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
4184 pci_read_config_dword(h->pdev, PCI_COMMAND_PARITY, &dma_refetch);
4185 dma_refetch |= 0x1;
4186 pci_write_config_dword(h->pdev, PCI_COMMAND_PARITY, dma_refetch);
4187}
4188
f70dba83 4189static int __devinit cciss_pci_init(ctlr_info_t *h)
6539fa9b 4190{
4809d098 4191 int prod_index, err;
6539fa9b 4192
f70dba83 4193 prod_index = cciss_lookup_board_id(h->pdev, &h->board_id);
6539fa9b 4194 if (prod_index < 0)
2ec24ff1 4195 return -ENODEV;
f70dba83
SC
4196 h->product_name = products[prod_index].product_name;
4197 h->access = *(products[prod_index].access);
1da177e4 4198
f70dba83 4199 if (cciss_board_disabled(h)) {
7c832835
BH
4200 printk(KERN_WARNING
4201 "cciss: controller appears to be disabled\n");
c33ac89b 4202 return -ENODEV;
1da177e4 4203 }
f70dba83 4204 err = pci_enable_device(h->pdev);
7c832835 4205 if (err) {
1da177e4 4206 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 4207 return err;
1da177e4 4208 }
1da177e4 4209
f70dba83 4210 err = pci_request_regions(h->pdev, "cciss");
4e570309
BH
4211 if (err) {
4212 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 4213 "aborting\n");
872225ca 4214 return err;
4e570309
BH
4215 }
4216
1da177e4 4217#ifdef CCISS_DEBUG
292e50dd 4218 printk(KERN_INFO "command = %x\n", command);
f70dba83
SC
4219 printk(KERN_INFO "irq = %x\n", h->pdev->irq);
4220 printk(KERN_INFO "board_id = %x\n", h->board_id);
7c832835 4221#endif /* CCISS_DEBUG */
1da177e4 4222
fb86a35b
MM
4223/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
4224 * else we use the IO-APIC interrupt assigned to us by system ROM.
4225 */
f70dba83
SC
4226 cciss_interrupt_mode(h);
4227 err = cciss_pci_find_memory_BAR(h->pdev, &h->paddr);
d474830d 4228 if (err)
e1438581 4229 goto err_out_free_res;
f70dba83
SC
4230 h->vaddr = remap_pci_mem(h->paddr, 0x250);
4231 if (!h->vaddr) {
da550321
SC
4232 err = -ENOMEM;
4233 goto err_out_free_res;
4234 }
f70dba83 4235 err = cciss_wait_for_board_ready(h);
e99ba136 4236 if (err)
4e570309 4237 goto err_out_free_res;
f70dba83 4238 err = cciss_find_cfgtables(h);
4809d098 4239 if (err)
4e570309 4240 goto err_out_free_res;
f70dba83
SC
4241 print_cfg_table(h->cfgtable);
4242 cciss_find_board_params(h);
1da177e4 4243
f70dba83 4244 if (!CISS_signature_present(h)) {
c33ac89b 4245 err = -ENODEV;
4e570309 4246 goto err_out_free_res;
1da177e4 4247 }
f70dba83
SC
4248 cciss_enable_scsi_prefetch(h);
4249 cciss_p600_dma_prefetch_quirk(h);
4250 cciss_put_controller_into_performant_mode(h);
1da177e4
LT
4251 return 0;
4252
5faad620 4253err_out_free_res:
872225ca
MM
4254 /*
4255 * Deliberately omit pci_disable_device(): it does something nasty to
4256 * Smart Array controllers that pci_enable_device does not undo
4257 */
f70dba83
SC
4258 if (h->transtable)
4259 iounmap(h->transtable);
4260 if (h->cfgtable)
4261 iounmap(h->cfgtable);
4262 if (h->vaddr)
4263 iounmap(h->vaddr);
4264 pci_release_regions(h->pdev);
c33ac89b 4265 return err;
1da177e4
LT
4266}
4267
6ae5ce8e
MM
4268/* Function to find the first free pointer into our hba[] array
4269 * Returns -1 if no free entries are left.
7c832835 4270 */
1da177e4
LT
4271static int alloc_cciss_hba(void)
4272{
799202cb 4273 int i;
1da177e4 4274
7c832835 4275 for (i = 0; i < MAX_CTLR; i++) {
1da177e4 4276 if (!hba[i]) {
f70dba83 4277 ctlr_info_t *h;
f2912a12 4278
f70dba83
SC
4279 h = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
4280 if (!h)
1da177e4 4281 goto Enomem;
f70dba83 4282 hba[i] = h;
1da177e4
LT
4283 return i;
4284 }
4285 }
4286 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 4287 " of %d controllers.\n", MAX_CTLR);
799202cb
MM
4288 return -1;
4289Enomem:
1da177e4 4290 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT
4291 return -1;
4292}
4293
f70dba83 4294static void free_hba(ctlr_info_t *h)
1da177e4 4295{
2c935593 4296 int i;
1da177e4 4297
f70dba83 4298 hba[h->ctlr] = NULL;
2c935593
SC
4299 for (i = 0; i < h->highest_lun + 1; i++)
4300 if (h->gendisk[i] != NULL)
4301 put_disk(h->gendisk[i]);
4302 kfree(h);
1da177e4
LT
4303}
4304
82eb03cf
CC
4305/* Send a message CDB to the firmware. */
4306static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
4307{
4308 typedef struct {
4309 CommandListHeader_struct CommandHeader;
4310 RequestBlock_struct Request;
4311 ErrDescriptor_struct ErrorDescriptor;
4312 } Command;
4313 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4314 Command *cmd;
4315 dma_addr_t paddr64;
4316 uint32_t paddr32, tag;
4317 void __iomem *vaddr;
4318 int i, err;
4319
4320 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4321 if (vaddr == NULL)
4322 return -ENOMEM;
4323
4324 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4325 CCISS commands, so they must be allocated from the lower 4GiB of
4326 memory. */
e930438c 4327 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC
4328 if (err) {
4329 iounmap(vaddr);
4330 return -ENOMEM;
4331 }
4332
4333 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4334 if (cmd == NULL) {
4335 iounmap(vaddr);
4336 return -ENOMEM;
4337 }
4338
4339 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4340 although there's no guarantee, we assume that the address is at
4341 least 4-byte aligned (most likely, it's page-aligned). */
4342 paddr32 = paddr64;
4343
4344 cmd->CommandHeader.ReplyQueue = 0;
4345 cmd->CommandHeader.SGList = 0;
4346 cmd->CommandHeader.SGTotal = 0;
4347 cmd->CommandHeader.Tag.lower = paddr32;
4348 cmd->CommandHeader.Tag.upper = 0;
4349 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4350
4351 cmd->Request.CDBLen = 16;
4352 cmd->Request.Type.Type = TYPE_MSG;
4353 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4354 cmd->Request.Type.Direction = XFER_NONE;
4355 cmd->Request.Timeout = 0; /* Don't time out */
4356 cmd->Request.CDB[0] = opcode;
4357 cmd->Request.CDB[1] = type;
4358 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4359
4360 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4361 cmd->ErrorDescriptor.Addr.upper = 0;
4362 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4363
4364 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4365
4366 for (i = 0; i < 10; i++) {
4367 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4368 if ((tag & ~3) == paddr32)
4369 break;
4370 schedule_timeout_uninterruptible(HZ);
4371 }
4372
4373 iounmap(vaddr);
4374
4375 /* we leak the DMA buffer here ... no choice since the controller could
4376 still complete the command. */
4377 if (i == 10) {
4378 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4379 opcode, type);
4380 return -ETIMEDOUT;
4381 }
4382
4383 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4384
4385 if (tag & 2) {
4386 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4387 opcode, type);
4388 return -EIO;
4389 }
4390
4391 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4392 opcode, type);
4393 return 0;
4394}
4395
4396#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4397#define cciss_noop(p) cciss_message(p, 3, 0)
4398
4399static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4400{
4401/* the #defines are stolen from drivers/pci/msi.h. */
4402#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4403#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4404
4405 int pos;
4406 u16 control = 0;
4407
4408 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4409 if (pos) {
4410 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4411 if (control & PCI_MSI_FLAGS_ENABLE) {
4412 printk(KERN_INFO "cciss: resetting MSI\n");
4413 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4414 }
4415 }
4416
4417 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4418 if (pos) {
4419 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4420 if (control & PCI_MSIX_FLAGS_ENABLE) {
4421 printk(KERN_INFO "cciss: resetting MSI-X\n");
4422 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4423 }
4424 }
4425
4426 return 0;
4427}
4428
a6528d01
SC
4429static int cciss_controller_hard_reset(struct pci_dev *pdev,
4430 void * __iomem vaddr, bool use_doorbell)
82eb03cf 4431{
a6528d01
SC
4432 u16 pmcsr;
4433 int pos;
82eb03cf 4434
a6528d01
SC
4435 if (use_doorbell) {
4436 /* For everything after the P600, the PCI power state method
4437 * of resetting the controller doesn't work, so we have this
4438 * other way using the doorbell register.
4439 */
4440 dev_info(&pdev->dev, "using doorbell to reset controller\n");
4441 writel(DOORBELL_CTLR_RESET, vaddr + SA5_DOORBELL);
4442 msleep(1000);
4443 } else { /* Try to do it the PCI power state way */
4444
4445 /* Quoting from the Open CISS Specification: "The Power
4446 * Management Control/Status Register (CSR) controls the power
4447 * state of the device. The normal operating state is D0,
4448 * CSR=00h. The software off state is D3, CSR=03h. To reset
4449 * the controller, place the interface device in D3 then to D0,
4450 * this causes a secondary PCI reset which will reset the
4451 * controller." */
4452
4453 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4454 if (pos == 0) {
4455 dev_err(&pdev->dev,
4456 "cciss_controller_hard_reset: "
4457 "PCI PM not supported\n");
4458 return -ENODEV;
4459 }
4460 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
4461 /* enter the D3hot power management state */
4462 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4463 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4464 pmcsr |= PCI_D3hot;
4465 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
82eb03cf 4466
a6528d01 4467 msleep(500);
82eb03cf 4468
a6528d01
SC
4469 /* enter the D0 power management state */
4470 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4471 pmcsr |= PCI_D0;
4472 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
82eb03cf 4473
a6528d01
SC
4474 msleep(500);
4475 }
4476 return 0;
4477}
4478
4479/* This does a hard reset of the controller using PCI power management
4480 * states or using the doorbell register. */
4481static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
4482{
4483 u16 saved_config_space[32];
4484 u64 cfg_offset;
4485 u32 cfg_base_addr;
4486 u64 cfg_base_addr_index;
4487 void __iomem *vaddr;
4488 unsigned long paddr;
4489 u32 misc_fw_support, active_transport;
4490 int rc, i;
4491 CfgTable_struct __iomem *cfgtable;
4492 bool use_doorbell;
058a0f9f 4493 u32 board_id;
a6528d01
SC
4494
4495 /* For controllers as old a the p600, this is very nearly
4496 * the same thing as
4497 *
4498 * pci_save_state(pci_dev);
4499 * pci_set_power_state(pci_dev, PCI_D3hot);
4500 * pci_set_power_state(pci_dev, PCI_D0);
4501 * pci_restore_state(pci_dev);
4502 *
4503 * but we can't use these nice canned kernel routines on
4504 * kexec, because they also check the MSI/MSI-X state in PCI
4505 * configuration space and do the wrong thing when it is
4506 * set/cleared. Also, the pci_save/restore_state functions
4507 * violate the ordering requirements for restoring the
4508 * configuration space from the CCISS document (see the
4509 * comment below). So we roll our own ....
4510 *
4511 * For controllers newer than the P600, the pci power state
4512 * method of resetting doesn't work so we have another way
4513 * using the doorbell register.
4514 */
82eb03cf 4515
058a0f9f
SC
4516 /* Exclude 640x boards. These are two pci devices in one slot
4517 * which share a battery backed cache module. One controls the
4518 * cache, the other accesses the cache through the one that controls
4519 * it. If we reset the one controlling the cache, the other will
4520 * likely not be happy. Just forbid resetting this conjoined mess.
4521 */
4522 cciss_lookup_board_id(pdev, &board_id);
4523 if (board_id == 0x409C0E11 || board_id == 0x409D0E11) {
4524 dev_warn(&pdev->dev, "Cannot reset Smart Array 640x "
4525 "due to shared cache module.");
4526 return -ENODEV;
4527 }
4528
82eb03cf
CC
4529 for (i = 0; i < 32; i++)
4530 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4531
a6528d01
SC
4532 /* find the first memory BAR, so we can find the cfg table */
4533 rc = cciss_pci_find_memory_BAR(pdev, &paddr);
4534 if (rc)
4535 return rc;
4536 vaddr = remap_pci_mem(paddr, 0x250);
4537 if (!vaddr)
4538 return -ENOMEM;
82eb03cf 4539
a6528d01
SC
4540 /* find cfgtable in order to check if reset via doorbell is supported */
4541 rc = cciss_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
4542 &cfg_base_addr_index, &cfg_offset);
4543 if (rc)
4544 goto unmap_vaddr;
4545 cfgtable = remap_pci_mem(pci_resource_start(pdev,
4546 cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
4547 if (!cfgtable) {
4548 rc = -ENOMEM;
4549 goto unmap_vaddr;
4550 }
82eb03cf 4551
a6528d01
SC
4552 /* If reset via doorbell register is supported, use that. */
4553 misc_fw_support = readl(&cfgtable->misc_fw_support);
4554 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
82eb03cf 4555
a6528d01
SC
4556 rc = cciss_controller_hard_reset(pdev, vaddr, use_doorbell);
4557 if (rc)
4558 goto unmap_cfgtable;
82eb03cf
CC
4559
4560 /* Restore the PCI configuration space. The Open CISS
4561 * Specification says, "Restore the PCI Configuration
4562 * Registers, offsets 00h through 60h. It is important to
4563 * restore the command register, 16-bits at offset 04h,
4564 * last. Do not restore the configuration status register,
a6528d01
SC
4565 * 16-bits at offset 06h." Note that the offset is 2*i.
4566 */
82eb03cf
CC
4567 for (i = 0; i < 32; i++) {
4568 if (i == 2 || i == 3)
4569 continue;
4570 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4571 }
4572 wmb();
4573 pci_write_config_word(pdev, 4, saved_config_space[2]);
4574
a6528d01
SC
4575 /* Some devices (notably the HP Smart Array 5i Controller)
4576 need a little pause here */
4577 msleep(CCISS_POST_RESET_PAUSE_MSECS);
4578
4579 /* Controller should be in simple mode at this point. If it's not,
4580 * It means we're on one of those controllers which doesn't support
4581 * the doorbell reset method and on which the PCI power management reset
4582 * method doesn't work (P800, for example.)
4583 * In those cases, don't try to proceed, as it generally doesn't work.
4584 */
4585 active_transport = readl(&cfgtable->TransportActive);
4586 if (active_transport & PERFORMANT_MODE) {
4587 dev_warn(&pdev->dev, "Unable to successfully reset controller,"
4588 " Ignoring controller.\n");
4589 rc = -ENODEV;
4590 }
4591
4592unmap_cfgtable:
4593 iounmap(cfgtable);
4594
4595unmap_vaddr:
4596 iounmap(vaddr);
4597 return rc;
82eb03cf
CC
4598}
4599
83123cb1
SC
4600static __devinit int cciss_init_reset_devices(struct pci_dev *pdev)
4601{
a6528d01 4602 int rc, i;
83123cb1
SC
4603
4604 if (!reset_devices)
4605 return 0;
4606
a6528d01
SC
4607 /* Reset the controller with a PCI power-cycle or via doorbell */
4608 rc = cciss_kdump_hard_reset_controller(pdev);
83123cb1 4609
a6528d01
SC
4610 /* -ENOTSUPP here means we cannot reset the controller
4611 * but it's already (and still) up and running in
058a0f9f
SC
4612 * "performant mode". Or, it might be 640x, which can't reset
4613 * due to concerns about shared bbwc between 6402/6404 pair.
a6528d01
SC
4614 */
4615 if (rc == -ENOTSUPP)
4616 return 0; /* just try to do the kdump anyhow. */
4617 if (rc)
4618 return -ENODEV;
4619 if (cciss_reset_msi(pdev))
4620 return -ENODEV;
83123cb1
SC
4621
4622 /* Now try to get the controller to respond to a no-op */
4623 for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) {
4624 if (cciss_noop(pdev) == 0)
4625 break;
4626 else
4627 dev_warn(&pdev->dev, "no-op failed%s\n",
4628 (i < CCISS_POST_RESET_NOOP_RETRIES - 1 ?
4629 "; re-trying" : ""));
4630 msleep(CCISS_POST_RESET_NOOP_INTERVAL_MSECS);
4631 }
4632 return 0;
4633}
4634
1da177e4
LT
4635/*
4636 * This is it. Find all the controllers and register them. I really hate
4637 * stealing all these major device numbers.
4638 * returns the number of block devices registered.
4639 */
4640static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4641 const struct pci_device_id *ent)
1da177e4 4642{
1da177e4 4643 int i;
799202cb 4644 int j = 0;
5c07a311 4645 int k = 0;
1da177e4 4646 int rc;
22bece00 4647 int dac, return_code;
212a5026 4648 InquiryData_struct *inq_buff;
f70dba83 4649 ctlr_info_t *h;
1da177e4 4650
83123cb1
SC
4651 rc = cciss_init_reset_devices(pdev);
4652 if (rc)
4653 return rc;
1da177e4 4654 i = alloc_cciss_hba();
7c832835 4655 if (i < 0)
e2019b58 4656 return -1;
292e50dd 4657
f70dba83
SC
4658 h = hba[i];
4659 h->pdev = pdev;
4660 h->busy_initializing = 1;
4661 INIT_HLIST_HEAD(&h->cmpQ);
4662 INIT_HLIST_HEAD(&h->reqQ);
4663 mutex_init(&h->busy_shutting_down);
1f8ef380 4664
f70dba83 4665 if (cciss_pci_init(h) != 0)
2cfa948c 4666 goto clean_no_release_regions;
1da177e4 4667
f70dba83
SC
4668 sprintf(h->devname, "cciss%d", i);
4669 h->ctlr = i;
1da177e4 4670
f70dba83 4671 init_completion(&h->scan_wait);
b368c9dd 4672
f70dba83 4673 if (cciss_create_hba_sysfs_entry(h))
7fe06326
AP
4674 goto clean0;
4675
1da177e4 4676 /* configure PCI DMA stuff */
6a35528a 4677 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4678 dac = 1;
284901a9 4679 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4680 dac = 0;
1da177e4 4681 else {
40aabb58 4682 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT
4683 goto clean1;
4684 }
4685
4686 /*
4687 * register with the major number, or get a dynamic major number
4688 * by passing 0 as argument. This is done for greater than
4689 * 8 controller support.
4690 */
4691 if (i < MAX_CTLR_ORIG)
f70dba83
SC
4692 h->major = COMPAQ_CISS_MAJOR + i;
4693 rc = register_blkdev(h->major, h->devname);
7c832835 4694 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4695 printk(KERN_ERR
7c832835 4696 "cciss: Unable to get major number %d for %s "
f70dba83 4697 "on hba %d\n", h->major, h->devname, i);
1da177e4 4698 goto clean1;
7c832835 4699 } else {
1da177e4 4700 if (i >= MAX_CTLR_ORIG)
f70dba83 4701 h->major = rc;
1da177e4
LT
4702 }
4703
4704 /* make sure the board interrupts are off */
f70dba83
SC
4705 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4706 if (h->msi_vector || h->msix_vector) {
4707 if (request_irq(h->intr[PERF_MODE_INT],
0c2b3908 4708 do_cciss_msix_intr,
f70dba83 4709 IRQF_DISABLED, h->devname, h)) {
0c2b3908 4710 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
f70dba83 4711 h->intr[PERF_MODE_INT], h->devname);
0c2b3908
MM
4712 goto clean2;
4713 }
4714 } else {
f70dba83
SC
4715 if (request_irq(h->intr[PERF_MODE_INT], do_cciss_intx,
4716 IRQF_DISABLED, h->devname, h)) {
0c2b3908 4717 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
f70dba83 4718 h->intr[PERF_MODE_INT], h->devname);
0c2b3908
MM
4719 goto clean2;
4720 }
1da177e4 4721 }
40aabb58
BH
4722
4723 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
f70dba83
SC
4724 h->devname, pdev->device, pci_name(pdev),
4725 h->intr[PERF_MODE_INT], dac ? "" : " not");
7c832835 4726
f70dba83
SC
4727 h->cmd_pool_bits =
4728 kmalloc(DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG)
061837bc 4729 * sizeof(unsigned long), GFP_KERNEL);
f70dba83
SC
4730 h->cmd_pool = (CommandList_struct *)
4731 pci_alloc_consistent(h->pdev,
4732 h->nr_cmds * sizeof(CommandList_struct),
4733 &(h->cmd_pool_dhandle));
4734 h->errinfo_pool = (ErrorInfo_struct *)
4735 pci_alloc_consistent(h->pdev,
4736 h->nr_cmds * sizeof(ErrorInfo_struct),
4737 &(h->errinfo_pool_dhandle));
4738 if ((h->cmd_pool_bits == NULL)
4739 || (h->cmd_pool == NULL)
4740 || (h->errinfo_pool == NULL)) {
7c832835 4741 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT
4742 goto clean4;
4743 }
5c07a311
DB
4744
4745 /* Need space for temp scatter list */
f70dba83 4746 h->scatter_list = kmalloc(h->max_commands *
5c07a311
DB
4747 sizeof(struct scatterlist *),
4748 GFP_KERNEL);
f70dba83
SC
4749 for (k = 0; k < h->nr_cmds; k++) {
4750 h->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4751 h->maxsgentries,
5c07a311 4752 GFP_KERNEL);
f70dba83 4753 if (h->scatter_list[k] == NULL) {
5c07a311
DB
4754 printk(KERN_ERR "cciss%d: could not allocate "
4755 "s/g lists\n", i);
4756 goto clean4;
4757 }
4758 }
f70dba83
SC
4759 h->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
4760 h->chainsize, h->nr_cmds);
4761 if (!h->cmd_sg_list && h->chainsize > 0)
5c07a311 4762 goto clean4;
5c07a311 4763
f70dba83 4764 spin_lock_init(&h->lock);
1da177e4 4765
7c832835 4766 /* Initialize the pdev driver private data.
f70dba83
SC
4767 have it point to h. */
4768 pci_set_drvdata(pdev, h);
7c832835
BH
4769 /* command and error info recs zeroed out before
4770 they are used */
f70dba83
SC
4771 memset(h->cmd_pool_bits, 0,
4772 DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG)
061837bc 4773 * sizeof(unsigned long));
1da177e4 4774
f70dba83
SC
4775 h->num_luns = 0;
4776 h->highest_lun = -1;
6ae5ce8e 4777 for (j = 0; j < CISS_MAX_LUN; j++) {
f70dba83
SC
4778 h->drv[j] = NULL;
4779 h->gendisk[j] = NULL;
6ae5ce8e 4780 }
1da177e4 4781
f70dba83 4782 cciss_scsi_setup(h);
1da177e4
LT
4783
4784 /* Turn the interrupts on so we can service requests */
f70dba83 4785 h->access.set_intr_mask(h, CCISS_INTR_ON);
1da177e4 4786
22bece00
MM
4787 /* Get the firmware version */
4788 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4789 if (inq_buff == NULL) {
4790 printk(KERN_ERR "cciss: out of memory\n");
4791 goto clean4;
4792 }
4793
f70dba83 4794 return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff,
b57695fe 4795 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00 4796 if (return_code == IO_OK) {
f70dba83
SC
4797 h->firm_ver[0] = inq_buff->data_byte[32];
4798 h->firm_ver[1] = inq_buff->data_byte[33];
4799 h->firm_ver[2] = inq_buff->data_byte[34];
4800 h->firm_ver[3] = inq_buff->data_byte[35];
22bece00
MM
4801 } else { /* send command failed */
4802 printk(KERN_WARNING "cciss: unable to determine firmware"
4803 " version of controller\n");
4804 }
212a5026 4805 kfree(inq_buff);
22bece00 4806
f70dba83 4807 cciss_procinit(h);
92c4231a 4808
f70dba83 4809 h->cciss_max_sectors = 8192;
92c4231a 4810
f70dba83
SC
4811 rebuild_lun_table(h, 1, 0);
4812 h->busy_initializing = 0;
e2019b58 4813 return 1;
1da177e4 4814
6ae5ce8e 4815clean4:
f70dba83 4816 kfree(h->cmd_pool_bits);
5c07a311 4817 /* Free up sg elements */
f70dba83
SC
4818 for (k = 0; k < h->nr_cmds; k++)
4819 kfree(h->scatter_list[k]);
4820 kfree(h->scatter_list);
4821 cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
4822 if (h->cmd_pool)
4823 pci_free_consistent(h->pdev,
4824 h->nr_cmds * sizeof(CommandList_struct),
4825 h->cmd_pool, h->cmd_pool_dhandle);
4826 if (h->errinfo_pool)
4827 pci_free_consistent(h->pdev,
4828 h->nr_cmds * sizeof(ErrorInfo_struct),
4829 h->errinfo_pool,
4830 h->errinfo_pool_dhandle);
4831 free_irq(h->intr[PERF_MODE_INT], h);
6ae5ce8e 4832clean2:
f70dba83 4833 unregister_blkdev(h->major, h->devname);
6ae5ce8e 4834clean1:
f70dba83 4835 cciss_destroy_hba_sysfs_entry(h);
7fe06326 4836clean0:
2cfa948c
SC
4837 pci_release_regions(pdev);
4838clean_no_release_regions:
f70dba83 4839 h->busy_initializing = 0;
9cef0d2f 4840
872225ca
MM
4841 /*
4842 * Deliberately omit pci_disable_device(): it does something nasty to
4843 * Smart Array controllers that pci_enable_device does not undo
4844 */
799202cb 4845 pci_set_drvdata(pdev, NULL);
f70dba83 4846 free_hba(h);
e2019b58 4847 return -1;
1da177e4
LT
4848}
4849
e9ca75b5 4850static void cciss_shutdown(struct pci_dev *pdev)
1da177e4 4851{
29009a03
SC
4852 ctlr_info_t *h;
4853 char *flush_buf;
7c832835 4854 int return_code;
1da177e4 4855
29009a03
SC
4856 h = pci_get_drvdata(pdev);
4857 flush_buf = kzalloc(4, GFP_KERNEL);
4858 if (!flush_buf) {
4859 printk(KERN_WARNING
4860 "cciss:%d cache not flushed, out of memory.\n",
4861 h->ctlr);
e9ca75b5 4862 return;
e9ca75b5 4863 }
29009a03
SC
4864 /* write all data in the battery backed cache to disk */
4865 memset(flush_buf, 0, 4);
f70dba83 4866 return_code = sendcmd_withirq(h, CCISS_CACHE_FLUSH, flush_buf,
29009a03
SC
4867 4, 0, CTLR_LUNID, TYPE_CMD);
4868 kfree(flush_buf);
4869 if (return_code != IO_OK)
4870 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4871 h->ctlr);
4872 h->access.set_intr_mask(h, CCISS_INTR_OFF);
5e216153 4873 free_irq(h->intr[PERF_MODE_INT], h);
e9ca75b5
GB
4874}
4875
4876static void __devexit cciss_remove_one(struct pci_dev *pdev)
4877{
f70dba83 4878 ctlr_info_t *h;
e9ca75b5
GB
4879 int i, j;
4880
7c832835
BH
4881 if (pci_get_drvdata(pdev) == NULL) {
4882 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT
4883 return;
4884 }
0a9279cc 4885
f70dba83
SC
4886 h = pci_get_drvdata(pdev);
4887 i = h->ctlr;
7c832835 4888 if (hba[i] == NULL) {
1da177e4 4889 printk(KERN_ERR "cciss: device appears to "
f70dba83 4890 "already be removed\n");
1da177e4
LT
4891 return;
4892 }
b6550777 4893
f70dba83 4894 mutex_lock(&h->busy_shutting_down);
0a9279cc 4895
f70dba83
SC
4896 remove_from_scan_list(h);
4897 remove_proc_entry(h->devname, proc_cciss);
4898 unregister_blkdev(h->major, h->devname);
b6550777
BH
4899
4900 /* remove it from the disk list */
4901 for (j = 0; j < CISS_MAX_LUN; j++) {
f70dba83 4902 struct gendisk *disk = h->gendisk[j];
b6550777 4903 if (disk) {
165125e1 4904 struct request_queue *q = disk->queue;
b6550777 4905
097d0264 4906 if (disk->flags & GENHD_FL_UP) {
f70dba83 4907 cciss_destroy_ld_sysfs_entry(h, j, 1);
b6550777 4908 del_gendisk(disk);
097d0264 4909 }
b6550777
BH
4910 if (q)
4911 blk_cleanup_queue(q);
4912 }
4913 }
4914
ba198efb 4915#ifdef CONFIG_CISS_SCSI_TAPE
f70dba83 4916 cciss_unregister_scsi(h); /* unhook from SCSI subsystem */
ba198efb 4917#endif
b6550777 4918
e9ca75b5 4919 cciss_shutdown(pdev);
fb86a35b
MM
4920
4921#ifdef CONFIG_PCI_MSI
f70dba83
SC
4922 if (h->msix_vector)
4923 pci_disable_msix(h->pdev);
4924 else if (h->msi_vector)
4925 pci_disable_msi(h->pdev);
7c832835 4926#endif /* CONFIG_PCI_MSI */
fb86a35b 4927
f70dba83
SC
4928 iounmap(h->transtable);
4929 iounmap(h->cfgtable);
4930 iounmap(h->vaddr);
1da177e4 4931
f70dba83
SC
4932 pci_free_consistent(h->pdev, h->nr_cmds * sizeof(CommandList_struct),
4933 h->cmd_pool, h->cmd_pool_dhandle);
4934 pci_free_consistent(h->pdev, h->nr_cmds * sizeof(ErrorInfo_struct),
4935 h->errinfo_pool, h->errinfo_pool_dhandle);
4936 kfree(h->cmd_pool_bits);
5c07a311 4937 /* Free up sg elements */
f70dba83
SC
4938 for (j = 0; j < h->nr_cmds; j++)
4939 kfree(h->scatter_list[j]);
4940 kfree(h->scatter_list);
4941 cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
872225ca
MM
4942 /*
4943 * Deliberately omit pci_disable_device(): it does something nasty to
4944 * Smart Array controllers that pci_enable_device does not undo
4945 */
7c832835 4946 pci_release_regions(pdev);
4e570309 4947 pci_set_drvdata(pdev, NULL);
f70dba83
SC
4948 cciss_destroy_hba_sysfs_entry(h);
4949 mutex_unlock(&h->busy_shutting_down);
4950 free_hba(h);
7c832835 4951}
1da177e4
LT
4952
4953static struct pci_driver cciss_pci_driver = {
7c832835
BH
4954 .name = "cciss",
4955 .probe = cciss_init_one,
4956 .remove = __devexit_p(cciss_remove_one),
4957 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4958 .shutdown = cciss_shutdown,
1da177e4
LT
4959};
4960
4961/*
4962 * This is it. Register the PCI driver information for the cards we control
7c832835 4963 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT
4964 */
4965static int __init cciss_init(void)
4966{
7fe06326
AP
4967 int err;
4968
10cbda97
JA
4969 /*
4970 * The hardware requires that commands are aligned on a 64-bit
4971 * boundary. Given that we use pci_alloc_consistent() to allocate an
4972 * array of them, the size must be a multiple of 8 bytes.
4973 */
1b7d0d28 4974 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
1da177e4
LT
4975 printk(KERN_INFO DRIVER_NAME "\n");
4976
7fe06326
AP
4977 err = bus_register(&cciss_bus_type);
4978 if (err)
4979 return err;
4980
b368c9dd
AP
4981 /* Start the scan thread */
4982 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4983 if (IS_ERR(cciss_scan_thread)) {
4984 err = PTR_ERR(cciss_scan_thread);
4985 goto err_bus_unregister;
4986 }
4987
1da177e4 4988 /* Register for our PCI devices */
7fe06326
AP
4989 err = pci_register_driver(&cciss_pci_driver);
4990 if (err)
b368c9dd 4991 goto err_thread_stop;
7fe06326 4992
617e1344 4993 return err;
7fe06326 4994
b368c9dd
AP
4995err_thread_stop:
4996 kthread_stop(cciss_scan_thread);
4997err_bus_unregister:
7fe06326 4998 bus_unregister(&cciss_bus_type);
b368c9dd 4999
7fe06326 5000 return err;
1da177e4
LT
5001}
5002
5003static void __exit cciss_cleanup(void)
5004{
5005 int i;
5006
5007 pci_unregister_driver(&cciss_pci_driver);
5008 /* double check that all controller entrys have been removed */
7c832835
BH
5009 for (i = 0; i < MAX_CTLR; i++) {
5010 if (hba[i] != NULL) {
1da177e4 5011 printk(KERN_WARNING "cciss: had to remove"
7c832835 5012 " controller %d\n", i);
1da177e4
LT
5013 cciss_remove_one(hba[i]->pdev);
5014 }
5015 }
b368c9dd 5016 kthread_stop(cciss_scan_thread);
928b4d8c 5017 remove_proc_entry("driver/cciss", NULL);
7fe06326 5018 bus_unregister(&cciss_bus_type);
1da177e4
LT
5019}
5020
5021module_init(cciss_init);
5022module_exit(cciss_cleanup);
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