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1 | /* | |
2 | * Disk Array driver for HP Smart Array controllers. | |
3 | * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P. | |
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 | |
7 | * the Free Software Foundation; version 2 of the License. | |
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 | |
11 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
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 | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | * 02111-1307, USA. | |
18 | * | |
19 | * Questions/Comments/Bugfixes to iss_storagedev@hp.com | |
20 | * | |
21 | */ | |
22 | ||
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> | |
29 | #include <linux/smp_lock.h> | |
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> | |
37 | #include <linux/seq_file.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/jiffies.h> | |
40 | #include <linux/hdreg.h> | |
41 | #include <linux/spinlock.h> | |
42 | #include <linux/compat.h> | |
43 | #include <linux/mutex.h> | |
44 | #include <asm/uaccess.h> | |
45 | #include <asm/io.h> | |
46 | ||
47 | #include <linux/dma-mapping.h> | |
48 | #include <linux/blkdev.h> | |
49 | #include <linux/genhd.h> | |
50 | #include <linux/completion.h> | |
51 | #include <scsi/scsi.h> | |
52 | #include <scsi/sg.h> | |
53 | #include <scsi/scsi_ioctl.h> | |
54 | #include <linux/cdrom.h> | |
55 | #include <linux/scatterlist.h> | |
56 | #include <linux/kthread.h> | |
57 | ||
58 | #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin)) | |
59 | #define DRIVER_NAME "HP CISS Driver (v 3.6.26)" | |
60 | #define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 26) | |
61 | ||
62 | /* Embedded module documentation macros - see modules.h */ | |
63 | MODULE_AUTHOR("Hewlett-Packard Company"); | |
64 | MODULE_DESCRIPTION("Driver for HP Smart Array Controllers"); | |
65 | MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers"); | |
66 | MODULE_VERSION("3.6.26"); | |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
69 | static int cciss_allow_hpsa; | |
70 | module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR); | |
71 | MODULE_PARM_DESC(cciss_allow_hpsa, | |
72 | "Prevent cciss driver from accessing hardware known to be " | |
73 | " supported by the hpsa driver"); | |
74 | ||
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 */ | |
80 | static const struct pci_device_id cciss_pci_device_id[] = { | |
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}, | |
99 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237}, | |
100 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D}, | |
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}, | |
106 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A}, | |
107 | {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B}, | |
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}, | |
113 | {0,} | |
114 | }; | |
115 | ||
116 | MODULE_DEVICE_TABLE(pci, cciss_pci_device_id); | |
117 | ||
118 | /* board_id = Subsystem Device ID & Vendor ID | |
119 | * product = Marketing Name for the board | |
120 | * access = Address of the struct of function pointers | |
121 | */ | |
122 | static struct board_type products[] = { | |
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}, | |
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}, | |
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}, | |
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}, | |
150 | {0x324A103C, "Smart Array P712m", &SA5_access}, | |
151 | {0x324B103C, "Smart Array P711m", &SA5_access}, | |
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}, | |
157 | }; | |
158 | ||
159 | /* How long to wait (in milliseconds) for board to go into simple mode */ | |
160 | #define MAX_CONFIG_WAIT 30000 | |
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 | ||
166 | #define MAX_CTLR 32 | |
167 | ||
168 | /* Originally cciss driver only supports 8 major numbers */ | |
169 | #define MAX_CTLR_ORIG 8 | |
170 | ||
171 | static ctlr_info_t *hba[MAX_CTLR]; | |
172 | ||
173 | static struct task_struct *cciss_scan_thread; | |
174 | static DEFINE_MUTEX(scan_mutex); | |
175 | static LIST_HEAD(scan_q); | |
176 | ||
177 | static void do_cciss_request(struct request_queue *q); | |
178 | static irqreturn_t do_cciss_intx(int irq, void *dev_id); | |
179 | static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id); | |
180 | static int cciss_open(struct block_device *bdev, fmode_t mode); | |
181 | static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode); | |
182 | static int cciss_release(struct gendisk *disk, fmode_t mode); | |
183 | static int do_ioctl(struct block_device *bdev, fmode_t mode, | |
184 | unsigned int cmd, unsigned long arg); | |
185 | static int cciss_ioctl(struct block_device *bdev, fmode_t mode, | |
186 | unsigned int cmd, unsigned long arg); | |
187 | static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); | |
188 | ||
189 | static int cciss_revalidate(struct gendisk *disk); | |
190 | static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl); | |
191 | static int deregister_disk(ctlr_info_t *h, int drv_index, | |
192 | int clear_all, int via_ioctl); | |
193 | ||
194 | static void cciss_read_capacity(ctlr_info_t *h, int logvol, | |
195 | sector_t *total_size, unsigned int *block_size); | |
196 | static void cciss_read_capacity_16(ctlr_info_t *h, int logvol, | |
197 | sector_t *total_size, unsigned int *block_size); | |
198 | static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol, | |
199 | sector_t total_size, | |
200 | unsigned int block_size, InquiryData_struct *inq_buff, | |
201 | drive_info_struct *drv); | |
202 | static void __devinit cciss_interrupt_mode(ctlr_info_t *); | |
203 | static void start_io(ctlr_info_t *h); | |
204 | static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size, | |
205 | __u8 page_code, unsigned char scsi3addr[], | |
206 | int cmd_type); | |
207 | static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, | |
208 | int attempt_retry); | |
209 | static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c); | |
210 | ||
211 | static int add_to_scan_list(struct ctlr_info *h); | |
212 | static int scan_thread(void *data); | |
213 | static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c); | |
214 | static void cciss_hba_release(struct device *dev); | |
215 | static void cciss_device_release(struct device *dev); | |
216 | static void cciss_free_gendisk(ctlr_info_t *h, int drv_index); | |
217 | static void cciss_free_drive_info(ctlr_info_t *h, int drv_index); | |
218 | static inline u32 next_command(ctlr_info_t *h); | |
219 | static 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); | |
222 | static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev, | |
223 | unsigned long *memory_bar); | |
224 | ||
225 | ||
226 | /* performant mode helper functions */ | |
227 | static void calc_bucket_map(int *bucket, int num_buckets, int nsgs, | |
228 | int *bucket_map); | |
229 | static void cciss_put_controller_into_performant_mode(ctlr_info_t *h); | |
230 | ||
231 | #ifdef CONFIG_PROC_FS | |
232 | static void cciss_procinit(ctlr_info_t *h); | |
233 | #else | |
234 | static void cciss_procinit(ctlr_info_t *h) | |
235 | { | |
236 | } | |
237 | #endif /* CONFIG_PROC_FS */ | |
238 | ||
239 | #ifdef CONFIG_COMPAT | |
240 | static int cciss_compat_ioctl(struct block_device *, fmode_t, | |
241 | unsigned, unsigned long); | |
242 | #endif | |
243 | ||
244 | static const struct block_device_operations cciss_fops = { | |
245 | .owner = THIS_MODULE, | |
246 | .open = cciss_unlocked_open, | |
247 | .release = cciss_release, | |
248 | .ioctl = do_ioctl, | |
249 | .getgeo = cciss_getgeo, | |
250 | #ifdef CONFIG_COMPAT | |
251 | .compat_ioctl = cciss_compat_ioctl, | |
252 | #endif | |
253 | .revalidate_disk = cciss_revalidate, | |
254 | }; | |
255 | ||
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 | */ | |
260 | static 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 | ||
266 | /* | |
267 | * Enqueuing and dequeuing functions for cmdlists. | |
268 | */ | |
269 | static inline void addQ(struct hlist_head *list, CommandList_struct *c) | |
270 | { | |
271 | hlist_add_head(&c->list, list); | |
272 | } | |
273 | ||
274 | static inline void removeQ(CommandList_struct *c) | |
275 | { | |
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; | |
286 | return; | |
287 | } | |
288 | ||
289 | hlist_del_init(&c->list); | |
290 | } | |
291 | ||
292 | static void enqueue_cmd_and_start_io(ctlr_info_t *h, | |
293 | CommandList_struct *c) | |
294 | { | |
295 | unsigned long flags; | |
296 | set_performant_mode(h, c); | |
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 | ||
304 | static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list, | |
305 | int nr_cmds) | |
306 | { | |
307 | int i; | |
308 | ||
309 | if (!cmd_sg_list) | |
310 | return; | |
311 | for (i = 0; i < nr_cmds; i++) { | |
312 | kfree(cmd_sg_list[i]); | |
313 | cmd_sg_list[i] = NULL; | |
314 | } | |
315 | kfree(cmd_sg_list); | |
316 | } | |
317 | ||
318 | static SGDescriptor_struct **cciss_allocate_sg_chain_blocks( | |
319 | ctlr_info_t *h, int chainsize, int nr_cmds) | |
320 | { | |
321 | int j; | |
322 | SGDescriptor_struct **cmd_sg_list; | |
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++) { | |
333 | /* Need a block of chainsized s/g elements. */ | |
334 | cmd_sg_list[j] = kmalloc((chainsize * | |
335 | sizeof(*cmd_sg_list[j])), GFP_KERNEL); | |
336 | if (!cmd_sg_list[j]) { | |
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; | |
343 | clean: | |
344 | cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds); | |
345 | return NULL; | |
346 | } | |
347 | ||
348 | static 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 | ||
362 | static 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 | ||
377 | #include "cciss_scsi.c" /* For SCSI tape support */ | |
378 | ||
379 | static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", | |
380 | "UNKNOWN" | |
381 | }; | |
382 | #define RAID_UNKNOWN (ARRAY_SIZE(raid_label)-1) | |
383 | ||
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) | |
391 | #define ENGAGE_SCSI "engage scsi" | |
392 | ||
393 | static struct proc_dir_entry *proc_cciss; | |
394 | ||
395 | static void cciss_seq_show_header(struct seq_file *seq) | |
396 | { | |
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], | |
413 | h->firm_ver[3], (unsigned int)h->intr[PERF_MODE_INT], | |
414 | h->num_luns, | |
415 | h->Qdepth, h->commands_outstanding, | |
416 | h->maxQsinceinit, h->max_outstanding, h->maxSG); | |
417 | ||
418 | #ifdef CONFIG_CISS_SCSI_TAPE | |
419 | cciss_seq_tape_report(seq, h); | |
420 | #endif /* CONFIG_CISS_SCSI_TAPE */ | |
421 | } | |
422 | ||
423 | static void *cciss_seq_start(struct seq_file *seq, loff_t *pos) | |
424 | { | |
425 | ctlr_info_t *h = seq->private; | |
426 | unsigned long flags; | |
427 | ||
428 | /* prevent displaying bogus info during configuration | |
429 | * or deconfiguration of a logical volume | |
430 | */ | |
431 | spin_lock_irqsave(&h->lock, flags); | |
432 | if (h->busy_configuring) { | |
433 | spin_unlock_irqrestore(&h->lock, flags); | |
434 | return ERR_PTR(-EBUSY); | |
435 | } | |
436 | h->busy_configuring = 1; | |
437 | spin_unlock_irqrestore(&h->lock, flags); | |
438 | ||
439 | if (*pos == 0) | |
440 | cciss_seq_show_header(seq); | |
441 | ||
442 | return pos; | |
443 | } | |
444 | ||
445 | static 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; | |
451 | drive_info_struct *drv = h->drv[*pos]; | |
452 | ||
453 | if (*pos > h->highest_lun) | |
454 | return 0; | |
455 | ||
456 | if (drv == NULL) /* it's possible for h->drv[] to have holes. */ | |
457 | return 0; | |
458 | ||
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 | ||
467 | if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN) | |
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 | ||
476 | static 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 | ||
487 | static 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; | |
495 | ||
496 | h->busy_configuring = 0; | |
497 | } | |
498 | ||
499 | static const struct seq_operations cciss_seq_ops = { | |
500 | .start = cciss_seq_start, | |
501 | .show = cciss_seq_show, | |
502 | .next = cciss_seq_next, | |
503 | .stop = cciss_seq_stop, | |
504 | }; | |
505 | ||
506 | static 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 | ||
517 | static ssize_t | |
518 | cciss_proc_write(struct file *file, const char __user *buf, | |
519 | size_t length, loff_t *ppos) | |
520 | { | |
521 | int err; | |
522 | char *buffer; | |
523 | ||
524 | #ifndef CONFIG_CISS_SCSI_TAPE | |
525 | return -EINVAL; | |
526 | #endif | |
527 | ||
528 | if (!buf || length > PAGE_SIZE - 1) | |
529 | return -EINVAL; | |
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; | |
544 | ||
545 | err = cciss_engage_scsi(h); | |
546 | if (err == 0) | |
547 | err = length; | |
548 | } else | |
549 | #endif /* CONFIG_CISS_SCSI_TAPE */ | |
550 | err = -EINVAL; | |
551 | /* might be nice to have "disengage" too, but it's not | |
552 | safely possible. (only 1 module use count, lock issues.) */ | |
553 | ||
554 | out: | |
555 | free_page((unsigned long)buffer); | |
556 | return err; | |
557 | } | |
558 | ||
559 | static const struct file_operations cciss_proc_fops = { | |
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 | ||
568 | static void __devinit cciss_procinit(ctlr_info_t *h) | |
569 | { | |
570 | struct proc_dir_entry *pde; | |
571 | ||
572 | if (proc_cciss == NULL) | |
573 | proc_cciss = proc_mkdir("driver/cciss", NULL); | |
574 | if (!proc_cciss) | |
575 | return; | |
576 | pde = proc_create_data(h->devname, S_IWUSR | S_IRUSR | S_IRGRP | | |
577 | S_IROTH, proc_cciss, | |
578 | &cciss_proc_fops, h); | |
579 | } | |
580 | #endif /* CONFIG_PROC_FS */ | |
581 | ||
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 | ||
587 | static 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 | } | |
599 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); | |
600 | ||
601 | static 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 | ||
611 | spin_lock_irqsave(&h->lock, flags); | |
612 | if (h->busy_configuring) | |
613 | ret = -EBUSY; | |
614 | else | |
615 | memcpy(sn, drv->serial_no, sizeof(sn)); | |
616 | spin_unlock_irqrestore(&h->lock, flags); | |
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 | } | |
629 | static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL); | |
630 | ||
631 | static 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 | ||
641 | spin_lock_irqsave(&h->lock, flags); | |
642 | if (h->busy_configuring) | |
643 | ret = -EBUSY; | |
644 | else | |
645 | memcpy(vendor, drv->vendor, VENDOR_LEN + 1); | |
646 | spin_unlock_irqrestore(&h->lock, flags); | |
647 | ||
648 | if (ret) | |
649 | return ret; | |
650 | else | |
651 | return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor); | |
652 | } | |
653 | static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL); | |
654 | ||
655 | static 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 | ||
665 | spin_lock_irqsave(&h->lock, flags); | |
666 | if (h->busy_configuring) | |
667 | ret = -EBUSY; | |
668 | else | |
669 | memcpy(model, drv->model, MODEL_LEN + 1); | |
670 | spin_unlock_irqrestore(&h->lock, flags); | |
671 | ||
672 | if (ret) | |
673 | return ret; | |
674 | else | |
675 | return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model); | |
676 | } | |
677 | static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL); | |
678 | ||
679 | static 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 | ||
689 | spin_lock_irqsave(&h->lock, flags); | |
690 | if (h->busy_configuring) | |
691 | ret = -EBUSY; | |
692 | else | |
693 | memcpy(rev, drv->rev, REV_LEN + 1); | |
694 | spin_unlock_irqrestore(&h->lock, flags); | |
695 | ||
696 | if (ret) | |
697 | return ret; | |
698 | else | |
699 | return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev); | |
700 | } | |
701 | static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); | |
702 | ||
703 | static ssize_t cciss_show_lunid(struct device *dev, | |
704 | struct device_attribute *attr, char *buf) | |
705 | { | |
706 | drive_info_struct *drv = to_drv(dev); | |
707 | struct ctlr_info *h = to_hba(drv->dev.parent); | |
708 | unsigned long flags; | |
709 | unsigned char lunid[8]; | |
710 | ||
711 | spin_lock_irqsave(&h->lock, flags); | |
712 | if (h->busy_configuring) { | |
713 | spin_unlock_irqrestore(&h->lock, flags); | |
714 | return -EBUSY; | |
715 | } | |
716 | if (!drv->heads) { | |
717 | spin_unlock_irqrestore(&h->lock, flags); | |
718 | return -ENOTTY; | |
719 | } | |
720 | memcpy(lunid, drv->LunID, sizeof(lunid)); | |
721 | spin_unlock_irqrestore(&h->lock, flags); | |
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 | } | |
726 | static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); | |
727 | ||
728 | static ssize_t cciss_show_raid_level(struct device *dev, | |
729 | struct device_attribute *attr, char *buf) | |
730 | { | |
731 | drive_info_struct *drv = to_drv(dev); | |
732 | struct ctlr_info *h = to_hba(drv->dev.parent); | |
733 | int raid; | |
734 | unsigned long flags; | |
735 | ||
736 | spin_lock_irqsave(&h->lock, flags); | |
737 | if (h->busy_configuring) { | |
738 | spin_unlock_irqrestore(&h->lock, flags); | |
739 | return -EBUSY; | |
740 | } | |
741 | raid = drv->raid_level; | |
742 | spin_unlock_irqrestore(&h->lock, flags); | |
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 | } | |
749 | static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL); | |
750 | ||
751 | static ssize_t cciss_show_usage_count(struct device *dev, | |
752 | struct device_attribute *attr, char *buf) | |
753 | { | |
754 | drive_info_struct *drv = to_drv(dev); | |
755 | struct ctlr_info *h = to_hba(drv->dev.parent); | |
756 | unsigned long flags; | |
757 | int count; | |
758 | ||
759 | spin_lock_irqsave(&h->lock, flags); | |
760 | if (h->busy_configuring) { | |
761 | spin_unlock_irqrestore(&h->lock, flags); | |
762 | return -EBUSY; | |
763 | } | |
764 | count = drv->usage_count; | |
765 | spin_unlock_irqrestore(&h->lock, flags); | |
766 | return snprintf(buf, 20, "%d\n", count); | |
767 | } | |
768 | static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); | |
769 | ||
770 | static struct attribute *cciss_host_attrs[] = { | |
771 | &dev_attr_rescan.attr, | |
772 | NULL | |
773 | }; | |
774 | ||
775 | static struct attribute_group cciss_host_attr_group = { | |
776 | .attrs = cciss_host_attrs, | |
777 | }; | |
778 | ||
779 | static const struct attribute_group *cciss_host_attr_groups[] = { | |
780 | &cciss_host_attr_group, | |
781 | NULL | |
782 | }; | |
783 | ||
784 | static struct device_type cciss_host_type = { | |
785 | .name = "cciss_host", | |
786 | .groups = cciss_host_attr_groups, | |
787 | .release = cciss_hba_release, | |
788 | }; | |
789 | ||
790 | static 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, | |
795 | &dev_attr_lunid.attr, | |
796 | &dev_attr_raid_level.attr, | |
797 | &dev_attr_usage_count.attr, | |
798 | NULL | |
799 | }; | |
800 | ||
801 | static struct attribute_group cciss_dev_attr_group = { | |
802 | .attrs = cciss_dev_attrs, | |
803 | }; | |
804 | ||
805 | static const struct attribute_group *cciss_dev_attr_groups[] = { | |
806 | &cciss_dev_attr_group, | |
807 | NULL | |
808 | }; | |
809 | ||
810 | static struct device_type cciss_dev_type = { | |
811 | .name = "cciss_device", | |
812 | .groups = cciss_dev_attr_groups, | |
813 | .release = cciss_device_release, | |
814 | }; | |
815 | ||
816 | static struct bus_type cciss_bus_type = { | |
817 | .name = "cciss", | |
818 | }; | |
819 | ||
820 | /* | |
821 | * cciss_hba_release is called when the reference count | |
822 | * of h->dev goes to zero. | |
823 | */ | |
824 | static 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 | } | |
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 | */ | |
837 | static 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 | */ | |
851 | static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h) | |
852 | { | |
853 | device_del(&h->dev); | |
854 | put_device(&h->dev); /* final put. */ | |
855 | } | |
856 | ||
857 | /* cciss_device_release is called when the reference count | |
858 | * of h->drv[x]dev goes to zero. | |
859 | */ | |
860 | static void cciss_device_release(struct device *dev) | |
861 | { | |
862 | drive_info_struct *drv = to_drv(dev); | |
863 | kfree(drv); | |
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 | */ | |
872 | static long cciss_create_ld_sysfs_entry(struct ctlr_info *h, | |
873 | int drv_index) | |
874 | { | |
875 | struct device *dev; | |
876 | ||
877 | if (h->drv[drv_index]->device_initialized) | |
878 | return 0; | |
879 | ||
880 | dev = &h->drv[drv_index]->dev; | |
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; | |
886 | h->drv[drv_index]->device_initialized = 1; | |
887 | return device_add(dev); | |
888 | } | |
889 | ||
890 | /* | |
891 | * Remove sysfs entries for a logical drive. | |
892 | */ | |
893 | static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index, | |
894 | int ctlr_exiting) | |
895 | { | |
896 | struct device *dev = &h->drv[drv_index]->dev; | |
897 | ||
898 | /* special case for c*d0, we only destroy it on controller exit */ | |
899 | if (drv_index == 0 && !ctlr_exiting) | |
900 | return; | |
901 | ||
902 | device_del(dev); | |
903 | put_device(dev); /* the "final" put. */ | |
904 | h->drv[drv_index] = NULL; | |
905 | } | |
906 | ||
907 | /* | |
908 | * For operations that cannot sleep, a command block is allocated at init, | |
909 | * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track | |
910 | * which ones are free or in use. | |
911 | */ | |
912 | static CommandList_struct *cmd_alloc(ctlr_info_t *h) | |
913 | { | |
914 | CommandList_struct *c; | |
915 | int i; | |
916 | u64bit temp64; | |
917 | dma_addr_t cmd_dma_handle, err_dma_handle; | |
918 | ||
919 | do { | |
920 | i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); | |
921 | if (i == h->nr_cmds) | |
922 | return NULL; | |
923 | } while (test_and_set_bit(i & (BITS_PER_LONG - 1), | |
924 | h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); | |
925 | c = h->cmd_pool + i; | |
926 | memset(c, 0, sizeof(CommandList_struct)); | |
927 | cmd_dma_handle = h->cmd_pool_dhandle + i * sizeof(CommandList_struct); | |
928 | c->err_info = h->errinfo_pool + i; | |
929 | memset(c->err_info, 0, sizeof(ErrorInfo_struct)); | |
930 | err_dma_handle = h->errinfo_pool_dhandle | |
931 | + i * sizeof(ErrorInfo_struct); | |
932 | h->nr_allocs++; | |
933 | ||
934 | c->cmdindex = i; | |
935 | ||
936 | INIT_HLIST_NODE(&c->list); | |
937 | c->busaddr = (__u32) cmd_dma_handle; | |
938 | temp64.val = (__u64) err_dma_handle; | |
939 | c->ErrDesc.Addr.lower = temp64.val32.lower; | |
940 | c->ErrDesc.Addr.upper = temp64.val32.upper; | |
941 | c->ErrDesc.Len = sizeof(ErrorInfo_struct); | |
942 | ||
943 | c->ctlr = h->ctlr; | |
944 | return c; | |
945 | } | |
946 | ||
947 | /* allocate a command using pci_alloc_consistent, used for ioctls, | |
948 | * etc., not for the main i/o path. | |
949 | */ | |
950 | static CommandList_struct *cmd_special_alloc(ctlr_info_t *h) | |
951 | { | |
952 | CommandList_struct *c; | |
953 | u64bit temp64; | |
954 | dma_addr_t cmd_dma_handle, err_dma_handle; | |
955 | ||
956 | c = (CommandList_struct *) pci_alloc_consistent(h->pdev, | |
957 | sizeof(CommandList_struct), &cmd_dma_handle); | |
958 | if (c == NULL) | |
959 | return NULL; | |
960 | memset(c, 0, sizeof(CommandList_struct)); | |
961 | ||
962 | c->cmdindex = -1; | |
963 | ||
964 | c->err_info = (ErrorInfo_struct *) | |
965 | pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct), | |
966 | &err_dma_handle); | |
967 | ||
968 | if (c->err_info == NULL) { | |
969 | pci_free_consistent(h->pdev, | |
970 | sizeof(CommandList_struct), c, cmd_dma_handle); | |
971 | return NULL; | |
972 | } | |
973 | memset(c->err_info, 0, sizeof(ErrorInfo_struct)); | |
974 | ||
975 | INIT_HLIST_NODE(&c->list); | |
976 | c->busaddr = (__u32) cmd_dma_handle; | |
977 | temp64.val = (__u64) err_dma_handle; | |
978 | c->ErrDesc.Addr.lower = temp64.val32.lower; | |
979 | c->ErrDesc.Addr.upper = temp64.val32.upper; | |
980 | c->ErrDesc.Len = sizeof(ErrorInfo_struct); | |
981 | ||
982 | c->ctlr = h->ctlr; | |
983 | return c; | |
984 | } | |
985 | ||
986 | static void cmd_free(ctlr_info_t *h, CommandList_struct *c) | |
987 | { | |
988 | int i; | |
989 | ||
990 | i = c - h->cmd_pool; | |
991 | clear_bit(i & (BITS_PER_LONG - 1), | |
992 | h->cmd_pool_bits + (i / BITS_PER_LONG)); | |
993 | h->nr_frees++; | |
994 | } | |
995 | ||
996 | static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c) | |
997 | { | |
998 | u64bit temp64; | |
999 | ||
1000 | temp64.val32.lower = c->ErrDesc.Addr.lower; | |
1001 | temp64.val32.upper = c->ErrDesc.Addr.upper; | |
1002 | pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct), | |
1003 | c->err_info, (dma_addr_t) temp64.val); | |
1004 | pci_free_consistent(h->pdev, sizeof(CommandList_struct), | |
1005 | c, (dma_addr_t) c->busaddr); | |
1006 | } | |
1007 | ||
1008 | static inline ctlr_info_t *get_host(struct gendisk *disk) | |
1009 | { | |
1010 | return disk->queue->queuedata; | |
1011 | } | |
1012 | ||
1013 | static inline drive_info_struct *get_drv(struct gendisk *disk) | |
1014 | { | |
1015 | return disk->private_data; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Open. Make sure the device is really there. | |
1020 | */ | |
1021 | static int cciss_open(struct block_device *bdev, fmode_t mode) | |
1022 | { | |
1023 | ctlr_info_t *h = get_host(bdev->bd_disk); | |
1024 | drive_info_struct *drv = get_drv(bdev->bd_disk); | |
1025 | ||
1026 | dev_dbg(&h->pdev->dev, "cciss_open %s\n", bdev->bd_disk->disk_name); | |
1027 | if (drv->busy_configuring) | |
1028 | return -EBUSY; | |
1029 | /* | |
1030 | * Root is allowed to open raw volume zero even if it's not configured | |
1031 | * so array config can still work. Root is also allowed to open any | |
1032 | * volume that has a LUN ID, so it can issue IOCTL to reread the | |
1033 | * disk information. I don't think I really like this | |
1034 | * but I'm already using way to many device nodes to claim another one | |
1035 | * for "raw controller". | |
1036 | */ | |
1037 | if (drv->heads == 0) { | |
1038 | if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */ | |
1039 | /* if not node 0 make sure it is a partition = 0 */ | |
1040 | if (MINOR(bdev->bd_dev) & 0x0f) { | |
1041 | return -ENXIO; | |
1042 | /* if it is, make sure we have a LUN ID */ | |
1043 | } else if (memcmp(drv->LunID, CTLR_LUNID, | |
1044 | sizeof(drv->LunID))) { | |
1045 | return -ENXIO; | |
1046 | } | |
1047 | } | |
1048 | if (!capable(CAP_SYS_ADMIN)) | |
1049 | return -EPERM; | |
1050 | } | |
1051 | drv->usage_count++; | |
1052 | h->usage_count++; | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode) | |
1057 | { | |
1058 | int ret; | |
1059 | ||
1060 | lock_kernel(); | |
1061 | ret = cciss_open(bdev, mode); | |
1062 | unlock_kernel(); | |
1063 | ||
1064 | return ret; | |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * Close. Sync first. | |
1069 | */ | |
1070 | static int cciss_release(struct gendisk *disk, fmode_t mode) | |
1071 | { | |
1072 | ctlr_info_t *h; | |
1073 | drive_info_struct *drv; | |
1074 | ||
1075 | lock_kernel(); | |
1076 | h = get_host(disk); | |
1077 | drv = get_drv(disk); | |
1078 | dev_dbg(&h->pdev->dev, "cciss_release %s\n", disk->disk_name); | |
1079 | drv->usage_count--; | |
1080 | h->usage_count--; | |
1081 | unlock_kernel(); | |
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | static int do_ioctl(struct block_device *bdev, fmode_t mode, | |
1086 | unsigned cmd, unsigned long arg) | |
1087 | { | |
1088 | int ret; | |
1089 | lock_kernel(); | |
1090 | ret = cciss_ioctl(bdev, mode, cmd, arg); | |
1091 | unlock_kernel(); | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | #ifdef CONFIG_COMPAT | |
1096 | ||
1097 | static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, | |
1098 | unsigned cmd, unsigned long arg); | |
1099 | static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, | |
1100 | unsigned cmd, unsigned long arg); | |
1101 | ||
1102 | static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
1103 | unsigned cmd, unsigned long arg) | |
1104 | { | |
1105 | switch (cmd) { | |
1106 | case CCISS_GETPCIINFO: | |
1107 | case CCISS_GETINTINFO: | |
1108 | case CCISS_SETINTINFO: | |
1109 | case CCISS_GETNODENAME: | |
1110 | case CCISS_SETNODENAME: | |
1111 | case CCISS_GETHEARTBEAT: | |
1112 | case CCISS_GETBUSTYPES: | |
1113 | case CCISS_GETFIRMVER: | |
1114 | case CCISS_GETDRIVVER: | |
1115 | case CCISS_REVALIDVOLS: | |
1116 | case CCISS_DEREGDISK: | |
1117 | case CCISS_REGNEWDISK: | |
1118 | case CCISS_REGNEWD: | |
1119 | case CCISS_RESCANDISK: | |
1120 | case CCISS_GETLUNINFO: | |
1121 | return do_ioctl(bdev, mode, cmd, arg); | |
1122 | ||
1123 | case CCISS_PASSTHRU32: | |
1124 | return cciss_ioctl32_passthru(bdev, mode, cmd, arg); | |
1125 | case CCISS_BIG_PASSTHRU32: | |
1126 | return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg); | |
1127 | ||
1128 | default: | |
1129 | return -ENOIOCTLCMD; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, | |
1134 | unsigned cmd, unsigned long arg) | |
1135 | { | |
1136 | IOCTL32_Command_struct __user *arg32 = | |
1137 | (IOCTL32_Command_struct __user *) arg; | |
1138 | IOCTL_Command_struct arg64; | |
1139 | IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); | |
1140 | int err; | |
1141 | u32 cp; | |
1142 | ||
1143 | err = 0; | |
1144 | err |= | |
1145 | copy_from_user(&arg64.LUN_info, &arg32->LUN_info, | |
1146 | sizeof(arg64.LUN_info)); | |
1147 | err |= | |
1148 | copy_from_user(&arg64.Request, &arg32->Request, | |
1149 | sizeof(arg64.Request)); | |
1150 | err |= | |
1151 | copy_from_user(&arg64.error_info, &arg32->error_info, | |
1152 | sizeof(arg64.error_info)); | |
1153 | err |= get_user(arg64.buf_size, &arg32->buf_size); | |
1154 | err |= get_user(cp, &arg32->buf); | |
1155 | arg64.buf = compat_ptr(cp); | |
1156 | err |= copy_to_user(p, &arg64, sizeof(arg64)); | |
1157 | ||
1158 | if (err) | |
1159 | return -EFAULT; | |
1160 | ||
1161 | err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p); | |
1162 | if (err) | |
1163 | return err; | |
1164 | err |= | |
1165 | copy_in_user(&arg32->error_info, &p->error_info, | |
1166 | sizeof(arg32->error_info)); | |
1167 | if (err) | |
1168 | return -EFAULT; | |
1169 | return err; | |
1170 | } | |
1171 | ||
1172 | static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, | |
1173 | unsigned cmd, unsigned long arg) | |
1174 | { | |
1175 | BIG_IOCTL32_Command_struct __user *arg32 = | |
1176 | (BIG_IOCTL32_Command_struct __user *) arg; | |
1177 | BIG_IOCTL_Command_struct arg64; | |
1178 | BIG_IOCTL_Command_struct __user *p = | |
1179 | compat_alloc_user_space(sizeof(arg64)); | |
1180 | int err; | |
1181 | u32 cp; | |
1182 | ||
1183 | err = 0; | |
1184 | err |= | |
1185 | copy_from_user(&arg64.LUN_info, &arg32->LUN_info, | |
1186 | sizeof(arg64.LUN_info)); | |
1187 | err |= | |
1188 | copy_from_user(&arg64.Request, &arg32->Request, | |
1189 | sizeof(arg64.Request)); | |
1190 | err |= | |
1191 | copy_from_user(&arg64.error_info, &arg32->error_info, | |
1192 | sizeof(arg64.error_info)); | |
1193 | err |= get_user(arg64.buf_size, &arg32->buf_size); | |
1194 | err |= get_user(arg64.malloc_size, &arg32->malloc_size); | |
1195 | err |= get_user(cp, &arg32->buf); | |
1196 | arg64.buf = compat_ptr(cp); | |
1197 | err |= copy_to_user(p, &arg64, sizeof(arg64)); | |
1198 | ||
1199 | if (err) | |
1200 | return -EFAULT; | |
1201 | ||
1202 | err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p); | |
1203 | if (err) | |
1204 | return err; | |
1205 | err |= | |
1206 | copy_in_user(&arg32->error_info, &p->error_info, | |
1207 | sizeof(arg32->error_info)); | |
1208 | if (err) | |
1209 | return -EFAULT; | |
1210 | return err; | |
1211 | } | |
1212 | #endif | |
1213 | ||
1214 | static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
1215 | { | |
1216 | drive_info_struct *drv = get_drv(bdev->bd_disk); | |
1217 | ||
1218 | if (!drv->cylinders) | |
1219 | return -ENXIO; | |
1220 | ||
1221 | geo->heads = drv->heads; | |
1222 | geo->sectors = drv->sectors; | |
1223 | geo->cylinders = drv->cylinders; | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | static void check_ioctl_unit_attention(ctlr_info_t *h, CommandList_struct *c) | |
1228 | { | |
1229 | if (c->err_info->CommandStatus == CMD_TARGET_STATUS && | |
1230 | c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) | |
1231 | (void)check_for_unit_attention(h, c); | |
1232 | } | |
1233 | ||
1234 | static int cciss_getpciinfo(ctlr_info_t *h, void __user *argp) | |
1235 | { | |
1236 | cciss_pci_info_struct pciinfo; | |
1237 | ||
1238 | if (!argp) | |
1239 | return -EINVAL; | |
1240 | pciinfo.domain = pci_domain_nr(h->pdev->bus); | |
1241 | pciinfo.bus = h->pdev->bus->number; | |
1242 | pciinfo.dev_fn = h->pdev->devfn; | |
1243 | pciinfo.board_id = h->board_id; | |
1244 | if (copy_to_user(argp, &pciinfo, sizeof(cciss_pci_info_struct))) | |
1245 | return -EFAULT; | |
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | static int cciss_getintinfo(ctlr_info_t *h, void __user *argp) | |
1250 | { | |
1251 | cciss_coalint_struct intinfo; | |
1252 | ||
1253 | if (!argp) | |
1254 | return -EINVAL; | |
1255 | intinfo.delay = readl(&h->cfgtable->HostWrite.CoalIntDelay); | |
1256 | intinfo.count = readl(&h->cfgtable->HostWrite.CoalIntCount); | |
1257 | if (copy_to_user | |
1258 | (argp, &intinfo, sizeof(cciss_coalint_struct))) | |
1259 | return -EFAULT; | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | static int cciss_setintinfo(ctlr_info_t *h, void __user *argp) | |
1264 | { | |
1265 | cciss_coalint_struct intinfo; | |
1266 | unsigned long flags; | |
1267 | int i; | |
1268 | ||
1269 | if (!argp) | |
1270 | return -EINVAL; | |
1271 | if (!capable(CAP_SYS_ADMIN)) | |
1272 | return -EPERM; | |
1273 | if (copy_from_user(&intinfo, argp, sizeof(intinfo))) | |
1274 | return -EFAULT; | |
1275 | if ((intinfo.delay == 0) && (intinfo.count == 0)) | |
1276 | return -EINVAL; | |
1277 | spin_lock_irqsave(&h->lock, flags); | |
1278 | /* Update the field, and then ring the doorbell */ | |
1279 | writel(intinfo.delay, &(h->cfgtable->HostWrite.CoalIntDelay)); | |
1280 | writel(intinfo.count, &(h->cfgtable->HostWrite.CoalIntCount)); | |
1281 | writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); | |
1282 | ||
1283 | for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { | |
1284 | if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) | |
1285 | break; | |
1286 | udelay(1000); /* delay and try again */ | |
1287 | } | |
1288 | spin_unlock_irqrestore(&h->lock, flags); | |
1289 | if (i >= MAX_IOCTL_CONFIG_WAIT) | |
1290 | return -EAGAIN; | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | static int cciss_getnodename(ctlr_info_t *h, void __user *argp) | |
1295 | { | |
1296 | NodeName_type NodeName; | |
1297 | int i; | |
1298 | ||
1299 | if (!argp) | |
1300 | return -EINVAL; | |
1301 | for (i = 0; i < 16; i++) | |
1302 | NodeName[i] = readb(&h->cfgtable->ServerName[i]); | |
1303 | if (copy_to_user(argp, NodeName, sizeof(NodeName_type))) | |
1304 | return -EFAULT; | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | static int cciss_setnodename(ctlr_info_t *h, void __user *argp) | |
1309 | { | |
1310 | NodeName_type NodeName; | |
1311 | unsigned long flags; | |
1312 | int i; | |
1313 | ||
1314 | if (!argp) | |
1315 | return -EINVAL; | |
1316 | if (!capable(CAP_SYS_ADMIN)) | |
1317 | return -EPERM; | |
1318 | if (copy_from_user(NodeName, argp, sizeof(NodeName_type))) | |
1319 | return -EFAULT; | |
1320 | spin_lock_irqsave(&h->lock, flags); | |
1321 | /* Update the field, and then ring the doorbell */ | |
1322 | for (i = 0; i < 16; i++) | |
1323 | writeb(NodeName[i], &h->cfgtable->ServerName[i]); | |
1324 | writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); | |
1325 | for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { | |
1326 | if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) | |
1327 | break; | |
1328 | udelay(1000); /* delay and try again */ | |
1329 | } | |
1330 | spin_unlock_irqrestore(&h->lock, flags); | |
1331 | if (i >= MAX_IOCTL_CONFIG_WAIT) | |
1332 | return -EAGAIN; | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | static int cciss_getheartbeat(ctlr_info_t *h, void __user *argp) | |
1337 | { | |
1338 | Heartbeat_type heartbeat; | |
1339 | ||
1340 | if (!argp) | |
1341 | return -EINVAL; | |
1342 | heartbeat = readl(&h->cfgtable->HeartBeat); | |
1343 | if (copy_to_user(argp, &heartbeat, sizeof(Heartbeat_type))) | |
1344 | return -EFAULT; | |
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | static int cciss_getbustypes(ctlr_info_t *h, void __user *argp) | |
1349 | { | |
1350 | BusTypes_type BusTypes; | |
1351 | ||
1352 | if (!argp) | |
1353 | return -EINVAL; | |
1354 | BusTypes = readl(&h->cfgtable->BusTypes); | |
1355 | if (copy_to_user(argp, &BusTypes, sizeof(BusTypes_type))) | |
1356 | return -EFAULT; | |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | static int cciss_getfirmver(ctlr_info_t *h, void __user *argp) | |
1361 | { | |
1362 | FirmwareVer_type firmware; | |
1363 | ||
1364 | if (!argp) | |
1365 | return -EINVAL; | |
1366 | memcpy(firmware, h->firm_ver, 4); | |
1367 | ||
1368 | if (copy_to_user | |
1369 | (argp, firmware, sizeof(FirmwareVer_type))) | |
1370 | return -EFAULT; | |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static int cciss_getdrivver(ctlr_info_t *h, void __user *argp) | |
1375 | { | |
1376 | DriverVer_type DriverVer = DRIVER_VERSION; | |
1377 | ||
1378 | if (!argp) | |
1379 | return -EINVAL; | |
1380 | if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type))) | |
1381 | return -EFAULT; | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | static int cciss_ioctl(struct block_device *bdev, fmode_t mode, | |
1386 | unsigned int cmd, unsigned long arg) | |
1387 | { | |
1388 | struct gendisk *disk = bdev->bd_disk; | |
1389 | ctlr_info_t *h = get_host(disk); | |
1390 | drive_info_struct *drv = get_drv(disk); | |
1391 | void __user *argp = (void __user *)arg; | |
1392 | ||
1393 | dev_dbg(&h->pdev->dev, "cciss_ioctl: Called with cmd=%x %lx\n", | |
1394 | cmd, arg); | |
1395 | switch (cmd) { | |
1396 | case CCISS_GETPCIINFO: | |
1397 | return cciss_getpciinfo(h, argp); | |
1398 | case CCISS_GETINTINFO: | |
1399 | return cciss_getintinfo(h, argp); | |
1400 | case CCISS_SETINTINFO: | |
1401 | return cciss_setintinfo(h, argp); | |
1402 | case CCISS_GETNODENAME: | |
1403 | return cciss_getnodename(h, argp); | |
1404 | case CCISS_SETNODENAME: | |
1405 | return cciss_setnodename(h, argp); | |
1406 | case CCISS_GETHEARTBEAT: | |
1407 | return cciss_getheartbeat(h, argp); | |
1408 | case CCISS_GETBUSTYPES: | |
1409 | return cciss_getbustypes(h, argp); | |
1410 | case CCISS_GETFIRMVER: | |
1411 | return cciss_getfirmver(h, argp); | |
1412 | case CCISS_GETDRIVVER: | |
1413 | return cciss_getdrivver(h, argp); | |
1414 | case CCISS_DEREGDISK: | |
1415 | case CCISS_REGNEWD: | |
1416 | case CCISS_REVALIDVOLS: | |
1417 | return rebuild_lun_table(h, 0, 1); | |
1418 | ||
1419 | case CCISS_GETLUNINFO:{ | |
1420 | LogvolInfo_struct luninfo; | |
1421 | ||
1422 | memcpy(&luninfo.LunID, drv->LunID, | |
1423 | sizeof(luninfo.LunID)); | |
1424 | luninfo.num_opens = drv->usage_count; | |
1425 | luninfo.num_parts = 0; | |
1426 | if (copy_to_user(argp, &luninfo, | |
1427 | sizeof(LogvolInfo_struct))) | |
1428 | return -EFAULT; | |
1429 | return 0; | |
1430 | } | |
1431 | case CCISS_PASSTHRU: | |
1432 | { | |
1433 | IOCTL_Command_struct iocommand; | |
1434 | CommandList_struct *c; | |
1435 | char *buff = NULL; | |
1436 | u64bit temp64; | |
1437 | DECLARE_COMPLETION_ONSTACK(wait); | |
1438 | ||
1439 | if (!arg) | |
1440 | return -EINVAL; | |
1441 | ||
1442 | if (!capable(CAP_SYS_RAWIO)) | |
1443 | return -EPERM; | |
1444 | ||
1445 | if (copy_from_user | |
1446 | (&iocommand, argp, sizeof(IOCTL_Command_struct))) | |
1447 | return -EFAULT; | |
1448 | if ((iocommand.buf_size < 1) && | |
1449 | (iocommand.Request.Type.Direction != XFER_NONE)) { | |
1450 | return -EINVAL; | |
1451 | } | |
1452 | #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */ | |
1453 | /* Check kmalloc limits */ | |
1454 | if (iocommand.buf_size > 128000) | |
1455 | return -EINVAL; | |
1456 | #endif | |
1457 | if (iocommand.buf_size > 0) { | |
1458 | buff = kmalloc(iocommand.buf_size, GFP_KERNEL); | |
1459 | if (buff == NULL) | |
1460 | return -EFAULT; | |
1461 | } | |
1462 | if (iocommand.Request.Type.Direction == XFER_WRITE) { | |
1463 | /* Copy the data into the buffer we created */ | |
1464 | if (copy_from_user | |
1465 | (buff, iocommand.buf, iocommand.buf_size)) { | |
1466 | kfree(buff); | |
1467 | return -EFAULT; | |
1468 | } | |
1469 | } else { | |
1470 | memset(buff, 0, iocommand.buf_size); | |
1471 | } | |
1472 | c = cmd_special_alloc(h); | |
1473 | if (!c) { | |
1474 | kfree(buff); | |
1475 | return -ENOMEM; | |
1476 | } | |
1477 | /* Fill in the command type */ | |
1478 | c->cmd_type = CMD_IOCTL_PEND; | |
1479 | /* Fill in Command Header */ | |
1480 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
1481 | if (iocommand.buf_size > 0) /* buffer to fill */ | |
1482 | { | |
1483 | c->Header.SGList = 1; | |
1484 | c->Header.SGTotal = 1; | |
1485 | } else /* no buffers to fill */ | |
1486 | { | |
1487 | c->Header.SGList = 0; | |
1488 | c->Header.SGTotal = 0; | |
1489 | } | |
1490 | c->Header.LUN = iocommand.LUN_info; | |
1491 | /* use the kernel address the cmd block for tag */ | |
1492 | c->Header.Tag.lower = c->busaddr; | |
1493 | ||
1494 | /* Fill in Request block */ | |
1495 | c->Request = iocommand.Request; | |
1496 | ||
1497 | /* Fill in the scatter gather information */ | |
1498 | if (iocommand.buf_size > 0) { | |
1499 | temp64.val = pci_map_single(h->pdev, buff, | |
1500 | iocommand.buf_size, | |
1501 | PCI_DMA_BIDIRECTIONAL); | |
1502 | c->SG[0].Addr.lower = temp64.val32.lower; | |
1503 | c->SG[0].Addr.upper = temp64.val32.upper; | |
1504 | c->SG[0].Len = iocommand.buf_size; | |
1505 | c->SG[0].Ext = 0; /* we are not chaining */ | |
1506 | } | |
1507 | c->waiting = &wait; | |
1508 | ||
1509 | enqueue_cmd_and_start_io(h, c); | |
1510 | wait_for_completion(&wait); | |
1511 | ||
1512 | /* unlock the buffers from DMA */ | |
1513 | temp64.val32.lower = c->SG[0].Addr.lower; | |
1514 | temp64.val32.upper = c->SG[0].Addr.upper; | |
1515 | pci_unmap_single(h->pdev, (dma_addr_t) temp64.val, | |
1516 | iocommand.buf_size, | |
1517 | PCI_DMA_BIDIRECTIONAL); | |
1518 | ||
1519 | check_ioctl_unit_attention(h, c); | |
1520 | ||
1521 | /* Copy the error information out */ | |
1522 | iocommand.error_info = *(c->err_info); | |
1523 | if (copy_to_user | |
1524 | (argp, &iocommand, sizeof(IOCTL_Command_struct))) { | |
1525 | kfree(buff); | |
1526 | cmd_special_free(h, c); | |
1527 | return -EFAULT; | |
1528 | } | |
1529 | ||
1530 | if (iocommand.Request.Type.Direction == XFER_READ) { | |
1531 | /* Copy the data out of the buffer we created */ | |
1532 | if (copy_to_user | |
1533 | (iocommand.buf, buff, iocommand.buf_size)) { | |
1534 | kfree(buff); | |
1535 | cmd_special_free(h, c); | |
1536 | return -EFAULT; | |
1537 | } | |
1538 | } | |
1539 | kfree(buff); | |
1540 | cmd_special_free(h, c); | |
1541 | return 0; | |
1542 | } | |
1543 | case CCISS_BIG_PASSTHRU:{ | |
1544 | BIG_IOCTL_Command_struct *ioc; | |
1545 | CommandList_struct *c; | |
1546 | unsigned char **buff = NULL; | |
1547 | int *buff_size = NULL; | |
1548 | u64bit temp64; | |
1549 | BYTE sg_used = 0; | |
1550 | int status = 0; | |
1551 | int i; | |
1552 | DECLARE_COMPLETION_ONSTACK(wait); | |
1553 | __u32 left; | |
1554 | __u32 sz; | |
1555 | BYTE __user *data_ptr; | |
1556 | ||
1557 | if (!arg) | |
1558 | return -EINVAL; | |
1559 | if (!capable(CAP_SYS_RAWIO)) | |
1560 | return -EPERM; | |
1561 | ioc = (BIG_IOCTL_Command_struct *) | |
1562 | kmalloc(sizeof(*ioc), GFP_KERNEL); | |
1563 | if (!ioc) { | |
1564 | status = -ENOMEM; | |
1565 | goto cleanup1; | |
1566 | } | |
1567 | if (copy_from_user(ioc, argp, sizeof(*ioc))) { | |
1568 | status = -EFAULT; | |
1569 | goto cleanup1; | |
1570 | } | |
1571 | if ((ioc->buf_size < 1) && | |
1572 | (ioc->Request.Type.Direction != XFER_NONE)) { | |
1573 | status = -EINVAL; | |
1574 | goto cleanup1; | |
1575 | } | |
1576 | /* Check kmalloc limits using all SGs */ | |
1577 | if (ioc->malloc_size > MAX_KMALLOC_SIZE) { | |
1578 | status = -EINVAL; | |
1579 | goto cleanup1; | |
1580 | } | |
1581 | if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { | |
1582 | status = -EINVAL; | |
1583 | goto cleanup1; | |
1584 | } | |
1585 | buff = | |
1586 | kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); | |
1587 | if (!buff) { | |
1588 | status = -ENOMEM; | |
1589 | goto cleanup1; | |
1590 | } | |
1591 | buff_size = kmalloc(MAXSGENTRIES * sizeof(int), | |
1592 | GFP_KERNEL); | |
1593 | if (!buff_size) { | |
1594 | status = -ENOMEM; | |
1595 | goto cleanup1; | |
1596 | } | |
1597 | left = ioc->buf_size; | |
1598 | data_ptr = ioc->buf; | |
1599 | while (left) { | |
1600 | sz = (left > | |
1601 | ioc->malloc_size) ? ioc-> | |
1602 | malloc_size : left; | |
1603 | buff_size[sg_used] = sz; | |
1604 | buff[sg_used] = kmalloc(sz, GFP_KERNEL); | |
1605 | if (buff[sg_used] == NULL) { | |
1606 | status = -ENOMEM; | |
1607 | goto cleanup1; | |
1608 | } | |
1609 | if (ioc->Request.Type.Direction == XFER_WRITE) { | |
1610 | if (copy_from_user | |
1611 | (buff[sg_used], data_ptr, sz)) { | |
1612 | status = -EFAULT; | |
1613 | goto cleanup1; | |
1614 | } | |
1615 | } else { | |
1616 | memset(buff[sg_used], 0, sz); | |
1617 | } | |
1618 | left -= sz; | |
1619 | data_ptr += sz; | |
1620 | sg_used++; | |
1621 | } | |
1622 | c = cmd_special_alloc(h); | |
1623 | if (!c) { | |
1624 | status = -ENOMEM; | |
1625 | goto cleanup1; | |
1626 | } | |
1627 | c->cmd_type = CMD_IOCTL_PEND; | |
1628 | c->Header.ReplyQueue = 0; | |
1629 | ||
1630 | if (ioc->buf_size > 0) { | |
1631 | c->Header.SGList = sg_used; | |
1632 | c->Header.SGTotal = sg_used; | |
1633 | } else { | |
1634 | c->Header.SGList = 0; | |
1635 | c->Header.SGTotal = 0; | |
1636 | } | |
1637 | c->Header.LUN = ioc->LUN_info; | |
1638 | c->Header.Tag.lower = c->busaddr; | |
1639 | ||
1640 | c->Request = ioc->Request; | |
1641 | if (ioc->buf_size > 0) { | |
1642 | for (i = 0; i < sg_used; i++) { | |
1643 | temp64.val = | |
1644 | pci_map_single(h->pdev, buff[i], | |
1645 | buff_size[i], | |
1646 | PCI_DMA_BIDIRECTIONAL); | |
1647 | c->SG[i].Addr.lower = | |
1648 | temp64.val32.lower; | |
1649 | c->SG[i].Addr.upper = | |
1650 | temp64.val32.upper; | |
1651 | c->SG[i].Len = buff_size[i]; | |
1652 | c->SG[i].Ext = 0; /* we are not chaining */ | |
1653 | } | |
1654 | } | |
1655 | c->waiting = &wait; | |
1656 | enqueue_cmd_and_start_io(h, c); | |
1657 | wait_for_completion(&wait); | |
1658 | /* unlock the buffers from DMA */ | |
1659 | for (i = 0; i < sg_used; i++) { | |
1660 | temp64.val32.lower = c->SG[i].Addr.lower; | |
1661 | temp64.val32.upper = c->SG[i].Addr.upper; | |
1662 | pci_unmap_single(h->pdev, | |
1663 | (dma_addr_t) temp64.val, buff_size[i], | |
1664 | PCI_DMA_BIDIRECTIONAL); | |
1665 | } | |
1666 | check_ioctl_unit_attention(h, c); | |
1667 | /* Copy the error information out */ | |
1668 | ioc->error_info = *(c->err_info); | |
1669 | if (copy_to_user(argp, ioc, sizeof(*ioc))) { | |
1670 | cmd_special_free(h, c); | |
1671 | status = -EFAULT; | |
1672 | goto cleanup1; | |
1673 | } | |
1674 | if (ioc->Request.Type.Direction == XFER_READ) { | |
1675 | /* Copy the data out of the buffer we created */ | |
1676 | BYTE __user *ptr = ioc->buf; | |
1677 | for (i = 0; i < sg_used; i++) { | |
1678 | if (copy_to_user | |
1679 | (ptr, buff[i], buff_size[i])) { | |
1680 | cmd_special_free(h, c); | |
1681 | status = -EFAULT; | |
1682 | goto cleanup1; | |
1683 | } | |
1684 | ptr += buff_size[i]; | |
1685 | } | |
1686 | } | |
1687 | cmd_special_free(h, c); | |
1688 | status = 0; | |
1689 | cleanup1: | |
1690 | if (buff) { | |
1691 | for (i = 0; i < sg_used; i++) | |
1692 | kfree(buff[i]); | |
1693 | kfree(buff); | |
1694 | } | |
1695 | kfree(buff_size); | |
1696 | kfree(ioc); | |
1697 | return status; | |
1698 | } | |
1699 | ||
1700 | /* scsi_cmd_ioctl handles these, below, though some are not */ | |
1701 | /* very meaningful for cciss. SG_IO is the main one people want. */ | |
1702 | ||
1703 | case SG_GET_VERSION_NUM: | |
1704 | case SG_SET_TIMEOUT: | |
1705 | case SG_GET_TIMEOUT: | |
1706 | case SG_GET_RESERVED_SIZE: | |
1707 | case SG_SET_RESERVED_SIZE: | |
1708 | case SG_EMULATED_HOST: | |
1709 | case SG_IO: | |
1710 | case SCSI_IOCTL_SEND_COMMAND: | |
1711 | return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); | |
1712 | ||
1713 | /* scsi_cmd_ioctl would normally handle these, below, but */ | |
1714 | /* they aren't a good fit for cciss, as CD-ROMs are */ | |
1715 | /* not supported, and we don't have any bus/target/lun */ | |
1716 | /* which we present to the kernel. */ | |
1717 | ||
1718 | case CDROM_SEND_PACKET: | |
1719 | case CDROMCLOSETRAY: | |
1720 | case CDROMEJECT: | |
1721 | case SCSI_IOCTL_GET_IDLUN: | |
1722 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
1723 | default: | |
1724 | return -ENOTTY; | |
1725 | } | |
1726 | } | |
1727 | ||
1728 | static void cciss_check_queues(ctlr_info_t *h) | |
1729 | { | |
1730 | int start_queue = h->next_to_run; | |
1731 | int i; | |
1732 | ||
1733 | /* check to see if we have maxed out the number of commands that can | |
1734 | * be placed on the queue. If so then exit. We do this check here | |
1735 | * in case the interrupt we serviced was from an ioctl and did not | |
1736 | * free any new commands. | |
1737 | */ | |
1738 | if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) | |
1739 | return; | |
1740 | ||
1741 | /* We have room on the queue for more commands. Now we need to queue | |
1742 | * them up. We will also keep track of the next queue to run so | |
1743 | * that every queue gets a chance to be started first. | |
1744 | */ | |
1745 | for (i = 0; i < h->highest_lun + 1; i++) { | |
1746 | int curr_queue = (start_queue + i) % (h->highest_lun + 1); | |
1747 | /* make sure the disk has been added and the drive is real | |
1748 | * because this can be called from the middle of init_one. | |
1749 | */ | |
1750 | if (!h->drv[curr_queue]) | |
1751 | continue; | |
1752 | if (!(h->drv[curr_queue]->queue) || | |
1753 | !(h->drv[curr_queue]->heads)) | |
1754 | continue; | |
1755 | blk_start_queue(h->gendisk[curr_queue]->queue); | |
1756 | ||
1757 | /* check to see if we have maxed out the number of commands | |
1758 | * that can be placed on the queue. | |
1759 | */ | |
1760 | if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) { | |
1761 | if (curr_queue == start_queue) { | |
1762 | h->next_to_run = | |
1763 | (start_queue + 1) % (h->highest_lun + 1); | |
1764 | break; | |
1765 | } else { | |
1766 | h->next_to_run = curr_queue; | |
1767 | break; | |
1768 | } | |
1769 | } | |
1770 | } | |
1771 | } | |
1772 | ||
1773 | static void cciss_softirq_done(struct request *rq) | |
1774 | { | |
1775 | CommandList_struct *c = rq->completion_data; | |
1776 | ctlr_info_t *h = hba[c->ctlr]; | |
1777 | SGDescriptor_struct *curr_sg = c->SG; | |
1778 | u64bit temp64; | |
1779 | unsigned long flags; | |
1780 | int i, ddir; | |
1781 | int sg_index = 0; | |
1782 | ||
1783 | if (c->Request.Type.Direction == XFER_READ) | |
1784 | ddir = PCI_DMA_FROMDEVICE; | |
1785 | else | |
1786 | ddir = PCI_DMA_TODEVICE; | |
1787 | ||
1788 | /* command did not need to be retried */ | |
1789 | /* unmap the DMA mapping for all the scatter gather elements */ | |
1790 | for (i = 0; i < c->Header.SGList; i++) { | |
1791 | if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) { | |
1792 | cciss_unmap_sg_chain_block(h, c); | |
1793 | /* Point to the next block */ | |
1794 | curr_sg = h->cmd_sg_list[c->cmdindex]; | |
1795 | sg_index = 0; | |
1796 | } | |
1797 | temp64.val32.lower = curr_sg[sg_index].Addr.lower; | |
1798 | temp64.val32.upper = curr_sg[sg_index].Addr.upper; | |
1799 | pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len, | |
1800 | ddir); | |
1801 | ++sg_index; | |
1802 | } | |
1803 | ||
1804 | dev_dbg(&h->pdev->dev, "Done with %p\n", rq); | |
1805 | ||
1806 | /* set the residual count for pc requests */ | |
1807 | if (rq->cmd_type == REQ_TYPE_BLOCK_PC) | |
1808 | rq->resid_len = c->err_info->ResidualCnt; | |
1809 | ||
1810 | blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO); | |
1811 | ||
1812 | spin_lock_irqsave(&h->lock, flags); | |
1813 | cmd_free(h, c); | |
1814 | cciss_check_queues(h); | |
1815 | spin_unlock_irqrestore(&h->lock, flags); | |
1816 | } | |
1817 | ||
1818 | static inline void log_unit_to_scsi3addr(ctlr_info_t *h, | |
1819 | unsigned char scsi3addr[], uint32_t log_unit) | |
1820 | { | |
1821 | memcpy(scsi3addr, h->drv[log_unit]->LunID, | |
1822 | sizeof(h->drv[log_unit]->LunID)); | |
1823 | } | |
1824 | ||
1825 | /* This function gets the SCSI vendor, model, and revision of a logical drive | |
1826 | * via the inquiry page 0. Model, vendor, and rev are set to empty strings if | |
1827 | * they cannot be read. | |
1828 | */ | |
1829 | static void cciss_get_device_descr(ctlr_info_t *h, int logvol, | |
1830 | char *vendor, char *model, char *rev) | |
1831 | { | |
1832 | int rc; | |
1833 | InquiryData_struct *inq_buf; | |
1834 | unsigned char scsi3addr[8]; | |
1835 | ||
1836 | *vendor = '\0'; | |
1837 | *model = '\0'; | |
1838 | *rev = '\0'; | |
1839 | ||
1840 | inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); | |
1841 | if (!inq_buf) | |
1842 | return; | |
1843 | ||
1844 | log_unit_to_scsi3addr(h, scsi3addr, logvol); | |
1845 | rc = sendcmd_withirq(h, CISS_INQUIRY, inq_buf, sizeof(*inq_buf), 0, | |
1846 | scsi3addr, TYPE_CMD); | |
1847 | if (rc == IO_OK) { | |
1848 | memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN); | |
1849 | vendor[VENDOR_LEN] = '\0'; | |
1850 | memcpy(model, &inq_buf->data_byte[16], MODEL_LEN); | |
1851 | model[MODEL_LEN] = '\0'; | |
1852 | memcpy(rev, &inq_buf->data_byte[32], REV_LEN); | |
1853 | rev[REV_LEN] = '\0'; | |
1854 | } | |
1855 | ||
1856 | kfree(inq_buf); | |
1857 | return; | |
1858 | } | |
1859 | ||
1860 | /* This function gets the serial number of a logical drive via | |
1861 | * inquiry page 0x83. Serial no. is 16 bytes. If the serial | |
1862 | * number cannot be had, for whatever reason, 16 bytes of 0xff | |
1863 | * are returned instead. | |
1864 | */ | |
1865 | static void cciss_get_serial_no(ctlr_info_t *h, int logvol, | |
1866 | unsigned char *serial_no, int buflen) | |
1867 | { | |
1868 | #define PAGE_83_INQ_BYTES 64 | |
1869 | int rc; | |
1870 | unsigned char *buf; | |
1871 | unsigned char scsi3addr[8]; | |
1872 | ||
1873 | if (buflen > 16) | |
1874 | buflen = 16; | |
1875 | memset(serial_no, 0xff, buflen); | |
1876 | buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); | |
1877 | if (!buf) | |
1878 | return; | |
1879 | memset(serial_no, 0, buflen); | |
1880 | log_unit_to_scsi3addr(h, scsi3addr, logvol); | |
1881 | rc = sendcmd_withirq(h, CISS_INQUIRY, buf, | |
1882 | PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); | |
1883 | if (rc == IO_OK) | |
1884 | memcpy(serial_no, &buf[8], buflen); | |
1885 | kfree(buf); | |
1886 | return; | |
1887 | } | |
1888 | ||
1889 | /* | |
1890 | * cciss_add_disk sets up the block device queue for a logical drive | |
1891 | */ | |
1892 | static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, | |
1893 | int drv_index) | |
1894 | { | |
1895 | disk->queue = blk_init_queue(do_cciss_request, &h->lock); | |
1896 | if (!disk->queue) | |
1897 | goto init_queue_failure; | |
1898 | sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index); | |
1899 | disk->major = h->major; | |
1900 | disk->first_minor = drv_index << NWD_SHIFT; | |
1901 | disk->fops = &cciss_fops; | |
1902 | if (cciss_create_ld_sysfs_entry(h, drv_index)) | |
1903 | goto cleanup_queue; | |
1904 | disk->private_data = h->drv[drv_index]; | |
1905 | disk->driverfs_dev = &h->drv[drv_index]->dev; | |
1906 | ||
1907 | /* Set up queue information */ | |
1908 | blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); | |
1909 | ||
1910 | /* This is a hardware imposed limit. */ | |
1911 | blk_queue_max_segments(disk->queue, h->maxsgentries); | |
1912 | ||
1913 | blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors); | |
1914 | ||
1915 | blk_queue_softirq_done(disk->queue, cciss_softirq_done); | |
1916 | ||
1917 | disk->queue->queuedata = h; | |
1918 | ||
1919 | blk_queue_logical_block_size(disk->queue, | |
1920 | h->drv[drv_index]->block_size); | |
1921 | ||
1922 | /* Make sure all queue data is written out before */ | |
1923 | /* setting h->drv[drv_index]->queue, as setting this */ | |
1924 | /* allows the interrupt handler to start the queue */ | |
1925 | wmb(); | |
1926 | h->drv[drv_index]->queue = disk->queue; | |
1927 | add_disk(disk); | |
1928 | return 0; | |
1929 | ||
1930 | cleanup_queue: | |
1931 | blk_cleanup_queue(disk->queue); | |
1932 | disk->queue = NULL; | |
1933 | init_queue_failure: | |
1934 | return -1; | |
1935 | } | |
1936 | ||
1937 | /* This function will check the usage_count of the drive to be updated/added. | |
1938 | * If the usage_count is zero and it is a heretofore unknown drive, or, | |
1939 | * the drive's capacity, geometry, or serial number has changed, | |
1940 | * then the drive information will be updated and the disk will be | |
1941 | * re-registered with the kernel. If these conditions don't hold, | |
1942 | * then it will be left alone for the next reboot. The exception to this | |
1943 | * is disk 0 which will always be left registered with the kernel since it | |
1944 | * is also the controller node. Any changes to disk 0 will show up on | |
1945 | * the next reboot. | |
1946 | */ | |
1947 | static void cciss_update_drive_info(ctlr_info_t *h, int drv_index, | |
1948 | int first_time, int via_ioctl) | |
1949 | { | |
1950 | struct gendisk *disk; | |
1951 | InquiryData_struct *inq_buff = NULL; | |
1952 | unsigned int block_size; | |
1953 | sector_t total_size; | |
1954 | unsigned long flags = 0; | |
1955 | int ret = 0; | |
1956 | drive_info_struct *drvinfo; | |
1957 | ||
1958 | /* Get information about the disk and modify the driver structure */ | |
1959 | inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); | |
1960 | drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL); | |
1961 | if (inq_buff == NULL || drvinfo == NULL) | |
1962 | goto mem_msg; | |
1963 | ||
1964 | /* testing to see if 16-byte CDBs are already being used */ | |
1965 | if (h->cciss_read == CCISS_READ_16) { | |
1966 | cciss_read_capacity_16(h, drv_index, | |
1967 | &total_size, &block_size); | |
1968 | ||
1969 | } else { | |
1970 | cciss_read_capacity(h, drv_index, &total_size, &block_size); | |
1971 | /* if read_capacity returns all F's this volume is >2TB */ | |
1972 | /* in size so we switch to 16-byte CDB's for all */ | |
1973 | /* read/write ops */ | |
1974 | if (total_size == 0xFFFFFFFFULL) { | |
1975 | cciss_read_capacity_16(h, drv_index, | |
1976 | &total_size, &block_size); | |
1977 | h->cciss_read = CCISS_READ_16; | |
1978 | h->cciss_write = CCISS_WRITE_16; | |
1979 | } else { | |
1980 | h->cciss_read = CCISS_READ_10; | |
1981 | h->cciss_write = CCISS_WRITE_10; | |
1982 | } | |
1983 | } | |
1984 | ||
1985 | cciss_geometry_inquiry(h, drv_index, total_size, block_size, | |
1986 | inq_buff, drvinfo); | |
1987 | drvinfo->block_size = block_size; | |
1988 | drvinfo->nr_blocks = total_size + 1; | |
1989 | ||
1990 | cciss_get_device_descr(h, drv_index, drvinfo->vendor, | |
1991 | drvinfo->model, drvinfo->rev); | |
1992 | cciss_get_serial_no(h, drv_index, drvinfo->serial_no, | |
1993 | sizeof(drvinfo->serial_no)); | |
1994 | /* Save the lunid in case we deregister the disk, below. */ | |
1995 | memcpy(drvinfo->LunID, h->drv[drv_index]->LunID, | |
1996 | sizeof(drvinfo->LunID)); | |
1997 | ||
1998 | /* Is it the same disk we already know, and nothing's changed? */ | |
1999 | if (h->drv[drv_index]->raid_level != -1 && | |
2000 | ((memcmp(drvinfo->serial_no, | |
2001 | h->drv[drv_index]->serial_no, 16) == 0) && | |
2002 | drvinfo->block_size == h->drv[drv_index]->block_size && | |
2003 | drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks && | |
2004 | drvinfo->heads == h->drv[drv_index]->heads && | |
2005 | drvinfo->sectors == h->drv[drv_index]->sectors && | |
2006 | drvinfo->cylinders == h->drv[drv_index]->cylinders)) | |
2007 | /* The disk is unchanged, nothing to update */ | |
2008 | goto freeret; | |
2009 | ||
2010 | /* If we get here it's not the same disk, or something's changed, | |
2011 | * so we need to * deregister it, and re-register it, if it's not | |
2012 | * in use. | |
2013 | * If the disk already exists then deregister it before proceeding | |
2014 | * (unless it's the first disk (for the controller node). | |
2015 | */ | |
2016 | if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) { | |
2017 | dev_warn(&h->pdev->dev, "disk %d has changed.\n", drv_index); | |
2018 | spin_lock_irqsave(&h->lock, flags); | |
2019 | h->drv[drv_index]->busy_configuring = 1; | |
2020 | spin_unlock_irqrestore(&h->lock, flags); | |
2021 | ||
2022 | /* deregister_disk sets h->drv[drv_index]->queue = NULL | |
2023 | * which keeps the interrupt handler from starting | |
2024 | * the queue. | |
2025 | */ | |
2026 | ret = deregister_disk(h, drv_index, 0, via_ioctl); | |
2027 | } | |
2028 | ||
2029 | /* If the disk is in use return */ | |
2030 | if (ret) | |
2031 | goto freeret; | |
2032 | ||
2033 | /* Save the new information from cciss_geometry_inquiry | |
2034 | * and serial number inquiry. If the disk was deregistered | |
2035 | * above, then h->drv[drv_index] will be NULL. | |
2036 | */ | |
2037 | if (h->drv[drv_index] == NULL) { | |
2038 | drvinfo->device_initialized = 0; | |
2039 | h->drv[drv_index] = drvinfo; | |
2040 | drvinfo = NULL; /* so it won't be freed below. */ | |
2041 | } else { | |
2042 | /* special case for cxd0 */ | |
2043 | h->drv[drv_index]->block_size = drvinfo->block_size; | |
2044 | h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks; | |
2045 | h->drv[drv_index]->heads = drvinfo->heads; | |
2046 | h->drv[drv_index]->sectors = drvinfo->sectors; | |
2047 | h->drv[drv_index]->cylinders = drvinfo->cylinders; | |
2048 | h->drv[drv_index]->raid_level = drvinfo->raid_level; | |
2049 | memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16); | |
2050 | memcpy(h->drv[drv_index]->vendor, drvinfo->vendor, | |
2051 | VENDOR_LEN + 1); | |
2052 | memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1); | |
2053 | memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1); | |
2054 | } | |
2055 | ||
2056 | ++h->num_luns; | |
2057 | disk = h->gendisk[drv_index]; | |
2058 | set_capacity(disk, h->drv[drv_index]->nr_blocks); | |
2059 | ||
2060 | /* If it's not disk 0 (drv_index != 0) | |
2061 | * or if it was disk 0, but there was previously | |
2062 | * no actual corresponding configured logical drive | |
2063 | * (raid_leve == -1) then we want to update the | |
2064 | * logical drive's information. | |
2065 | */ | |
2066 | if (drv_index || first_time) { | |
2067 | if (cciss_add_disk(h, disk, drv_index) != 0) { | |
2068 | cciss_free_gendisk(h, drv_index); | |
2069 | cciss_free_drive_info(h, drv_index); | |
2070 | dev_warn(&h->pdev->dev, "could not update disk %d\n", | |
2071 | drv_index); | |
2072 | --h->num_luns; | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | freeret: | |
2077 | kfree(inq_buff); | |
2078 | kfree(drvinfo); | |
2079 | return; | |
2080 | mem_msg: | |
2081 | dev_err(&h->pdev->dev, "out of memory\n"); | |
2082 | goto freeret; | |
2083 | } | |
2084 | ||
2085 | /* This function will find the first index of the controllers drive array | |
2086 | * that has a null drv pointer and allocate the drive info struct and | |
2087 | * will return that index This is where new drives will be added. | |
2088 | * If the index to be returned is greater than the highest_lun index for | |
2089 | * the controller then highest_lun is set * to this new index. | |
2090 | * If there are no available indexes or if tha allocation fails, then -1 | |
2091 | * is returned. * "controller_node" is used to know if this is a real | |
2092 | * logical drive, or just the controller node, which determines if this | |
2093 | * counts towards highest_lun. | |
2094 | */ | |
2095 | static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node) | |
2096 | { | |
2097 | int i; | |
2098 | drive_info_struct *drv; | |
2099 | ||
2100 | /* Search for an empty slot for our drive info */ | |
2101 | for (i = 0; i < CISS_MAX_LUN; i++) { | |
2102 | ||
2103 | /* if not cxd0 case, and it's occupied, skip it. */ | |
2104 | if (h->drv[i] && i != 0) | |
2105 | continue; | |
2106 | /* | |
2107 | * If it's cxd0 case, and drv is alloc'ed already, and a | |
2108 | * disk is configured there, skip it. | |
2109 | */ | |
2110 | if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1) | |
2111 | continue; | |
2112 | ||
2113 | /* | |
2114 | * We've found an empty slot. Update highest_lun | |
2115 | * provided this isn't just the fake cxd0 controller node. | |
2116 | */ | |
2117 | if (i > h->highest_lun && !controller_node) | |
2118 | h->highest_lun = i; | |
2119 | ||
2120 | /* If adding a real disk at cxd0, and it's already alloc'ed */ | |
2121 | if (i == 0 && h->drv[i] != NULL) | |
2122 | return i; | |
2123 | ||
2124 | /* | |
2125 | * Found an empty slot, not already alloc'ed. Allocate it. | |
2126 | * Mark it with raid_level == -1, so we know it's new later on. | |
2127 | */ | |
2128 | drv = kzalloc(sizeof(*drv), GFP_KERNEL); | |
2129 | if (!drv) | |
2130 | return -1; | |
2131 | drv->raid_level = -1; /* so we know it's new */ | |
2132 | h->drv[i] = drv; | |
2133 | return i; | |
2134 | } | |
2135 | return -1; | |
2136 | } | |
2137 | ||
2138 | static void cciss_free_drive_info(ctlr_info_t *h, int drv_index) | |
2139 | { | |
2140 | kfree(h->drv[drv_index]); | |
2141 | h->drv[drv_index] = NULL; | |
2142 | } | |
2143 | ||
2144 | static void cciss_free_gendisk(ctlr_info_t *h, int drv_index) | |
2145 | { | |
2146 | put_disk(h->gendisk[drv_index]); | |
2147 | h->gendisk[drv_index] = NULL; | |
2148 | } | |
2149 | ||
2150 | /* cciss_add_gendisk finds a free hba[]->drv structure | |
2151 | * and allocates a gendisk if needed, and sets the lunid | |
2152 | * in the drvinfo structure. It returns the index into | |
2153 | * the ->drv[] array, or -1 if none are free. | |
2154 | * is_controller_node indicates whether highest_lun should | |
2155 | * count this disk, or if it's only being added to provide | |
2156 | * a means to talk to the controller in case no logical | |
2157 | * drives have yet been configured. | |
2158 | */ | |
2159 | static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[], | |
2160 | int controller_node) | |
2161 | { | |
2162 | int drv_index; | |
2163 | ||
2164 | drv_index = cciss_alloc_drive_info(h, controller_node); | |
2165 | if (drv_index == -1) | |
2166 | return -1; | |
2167 | ||
2168 | /*Check if the gendisk needs to be allocated */ | |
2169 | if (!h->gendisk[drv_index]) { | |
2170 | h->gendisk[drv_index] = | |
2171 | alloc_disk(1 << NWD_SHIFT); | |
2172 | if (!h->gendisk[drv_index]) { | |
2173 | dev_err(&h->pdev->dev, | |
2174 | "could not allocate a new disk %d\n", | |
2175 | drv_index); | |
2176 | goto err_free_drive_info; | |
2177 | } | |
2178 | } | |
2179 | memcpy(h->drv[drv_index]->LunID, lunid, | |
2180 | sizeof(h->drv[drv_index]->LunID)); | |
2181 | if (cciss_create_ld_sysfs_entry(h, drv_index)) | |
2182 | goto err_free_disk; | |
2183 | /* Don't need to mark this busy because nobody */ | |
2184 | /* else knows about this disk yet to contend */ | |
2185 | /* for access to it. */ | |
2186 | h->drv[drv_index]->busy_configuring = 0; | |
2187 | wmb(); | |
2188 | return drv_index; | |
2189 | ||
2190 | err_free_disk: | |
2191 | cciss_free_gendisk(h, drv_index); | |
2192 | err_free_drive_info: | |
2193 | cciss_free_drive_info(h, drv_index); | |
2194 | return -1; | |
2195 | } | |
2196 | ||
2197 | /* This is for the special case of a controller which | |
2198 | * has no logical drives. In this case, we still need | |
2199 | * to register a disk so the controller can be accessed | |
2200 | * by the Array Config Utility. | |
2201 | */ | |
2202 | static void cciss_add_controller_node(ctlr_info_t *h) | |
2203 | { | |
2204 | struct gendisk *disk; | |
2205 | int drv_index; | |
2206 | ||
2207 | if (h->gendisk[0] != NULL) /* already did this? Then bail. */ | |
2208 | return; | |
2209 | ||
2210 | drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1); | |
2211 | if (drv_index == -1) | |
2212 | goto error; | |
2213 | h->drv[drv_index]->block_size = 512; | |
2214 | h->drv[drv_index]->nr_blocks = 0; | |
2215 | h->drv[drv_index]->heads = 0; | |
2216 | h->drv[drv_index]->sectors = 0; | |
2217 | h->drv[drv_index]->cylinders = 0; | |
2218 | h->drv[drv_index]->raid_level = -1; | |
2219 | memset(h->drv[drv_index]->serial_no, 0, 16); | |
2220 | disk = h->gendisk[drv_index]; | |
2221 | if (cciss_add_disk(h, disk, drv_index) == 0) | |
2222 | return; | |
2223 | cciss_free_gendisk(h, drv_index); | |
2224 | cciss_free_drive_info(h, drv_index); | |
2225 | error: | |
2226 | dev_warn(&h->pdev->dev, "could not add disk 0.\n"); | |
2227 | return; | |
2228 | } | |
2229 | ||
2230 | /* This function will add and remove logical drives from the Logical | |
2231 | * drive array of the controller and maintain persistency of ordering | |
2232 | * so that mount points are preserved until the next reboot. This allows | |
2233 | * for the removal of logical drives in the middle of the drive array | |
2234 | * without a re-ordering of those drives. | |
2235 | * INPUT | |
2236 | * h = The controller to perform the operations on | |
2237 | */ | |
2238 | static int rebuild_lun_table(ctlr_info_t *h, int first_time, | |
2239 | int via_ioctl) | |
2240 | { | |
2241 | int num_luns; | |
2242 | ReportLunData_struct *ld_buff = NULL; | |
2243 | int return_code; | |
2244 | int listlength = 0; | |
2245 | int i; | |
2246 | int drv_found; | |
2247 | int drv_index = 0; | |
2248 | unsigned char lunid[8] = CTLR_LUNID; | |
2249 | unsigned long flags; | |
2250 | ||
2251 | if (!capable(CAP_SYS_RAWIO)) | |
2252 | return -EPERM; | |
2253 | ||
2254 | /* Set busy_configuring flag for this operation */ | |
2255 | spin_lock_irqsave(&h->lock, flags); | |
2256 | if (h->busy_configuring) { | |
2257 | spin_unlock_irqrestore(&h->lock, flags); | |
2258 | return -EBUSY; | |
2259 | } | |
2260 | h->busy_configuring = 1; | |
2261 | spin_unlock_irqrestore(&h->lock, flags); | |
2262 | ||
2263 | ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); | |
2264 | if (ld_buff == NULL) | |
2265 | goto mem_msg; | |
2266 | ||
2267 | return_code = sendcmd_withirq(h, CISS_REPORT_LOG, ld_buff, | |
2268 | sizeof(ReportLunData_struct), | |
2269 | 0, CTLR_LUNID, TYPE_CMD); | |
2270 | ||
2271 | if (return_code == IO_OK) | |
2272 | listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); | |
2273 | else { /* reading number of logical volumes failed */ | |
2274 | dev_warn(&h->pdev->dev, | |
2275 | "report logical volume command failed\n"); | |
2276 | listlength = 0; | |
2277 | goto freeret; | |
2278 | } | |
2279 | ||
2280 | num_luns = listlength / 8; /* 8 bytes per entry */ | |
2281 | if (num_luns > CISS_MAX_LUN) { | |
2282 | num_luns = CISS_MAX_LUN; | |
2283 | dev_warn(&h->pdev->dev, "more luns configured" | |
2284 | " on controller than can be handled by" | |
2285 | " this driver.\n"); | |
2286 | } | |
2287 | ||
2288 | if (num_luns == 0) | |
2289 | cciss_add_controller_node(h); | |
2290 | ||
2291 | /* Compare controller drive array to driver's drive array | |
2292 | * to see if any drives are missing on the controller due | |
2293 | * to action of Array Config Utility (user deletes drive) | |
2294 | * and deregister logical drives which have disappeared. | |
2295 | */ | |
2296 | for (i = 0; i <= h->highest_lun; i++) { | |
2297 | int j; | |
2298 | drv_found = 0; | |
2299 | ||
2300 | /* skip holes in the array from already deleted drives */ | |
2301 | if (h->drv[i] == NULL) | |
2302 | continue; | |
2303 | ||
2304 | for (j = 0; j < num_luns; j++) { | |
2305 | memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid)); | |
2306 | if (memcmp(h->drv[i]->LunID, lunid, | |
2307 | sizeof(lunid)) == 0) { | |
2308 | drv_found = 1; | |
2309 | break; | |
2310 | } | |
2311 | } | |
2312 | if (!drv_found) { | |
2313 | /* Deregister it from the OS, it's gone. */ | |
2314 | spin_lock_irqsave(&h->lock, flags); | |
2315 | h->drv[i]->busy_configuring = 1; | |
2316 | spin_unlock_irqrestore(&h->lock, flags); | |
2317 | return_code = deregister_disk(h, i, 1, via_ioctl); | |
2318 | if (h->drv[i] != NULL) | |
2319 | h->drv[i]->busy_configuring = 0; | |
2320 | } | |
2321 | } | |
2322 | ||
2323 | /* Compare controller drive array to driver's drive array. | |
2324 | * Check for updates in the drive information and any new drives | |
2325 | * on the controller due to ACU adding logical drives, or changing | |
2326 | * a logical drive's size, etc. Reregister any new/changed drives | |
2327 | */ | |
2328 | for (i = 0; i < num_luns; i++) { | |
2329 | int j; | |
2330 | ||
2331 | drv_found = 0; | |
2332 | ||
2333 | memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid)); | |
2334 | /* Find if the LUN is already in the drive array | |
2335 | * of the driver. If so then update its info | |
2336 | * if not in use. If it does not exist then find | |
2337 | * the first free index and add it. | |
2338 | */ | |
2339 | for (j = 0; j <= h->highest_lun; j++) { | |
2340 | if (h->drv[j] != NULL && | |
2341 | memcmp(h->drv[j]->LunID, lunid, | |
2342 | sizeof(h->drv[j]->LunID)) == 0) { | |
2343 | drv_index = j; | |
2344 | drv_found = 1; | |
2345 | break; | |
2346 | } | |
2347 | } | |
2348 | ||
2349 | /* check if the drive was found already in the array */ | |
2350 | if (!drv_found) { | |
2351 | drv_index = cciss_add_gendisk(h, lunid, 0); | |
2352 | if (drv_index == -1) | |
2353 | goto freeret; | |
2354 | } | |
2355 | cciss_update_drive_info(h, drv_index, first_time, via_ioctl); | |
2356 | } /* end for */ | |
2357 | ||
2358 | freeret: | |
2359 | kfree(ld_buff); | |
2360 | h->busy_configuring = 0; | |
2361 | /* We return -1 here to tell the ACU that we have registered/updated | |
2362 | * all of the drives that we can and to keep it from calling us | |
2363 | * additional times. | |
2364 | */ | |
2365 | return -1; | |
2366 | mem_msg: | |
2367 | dev_err(&h->pdev->dev, "out of memory\n"); | |
2368 | h->busy_configuring = 0; | |
2369 | goto freeret; | |
2370 | } | |
2371 | ||
2372 | static void cciss_clear_drive_info(drive_info_struct *drive_info) | |
2373 | { | |
2374 | /* zero out the disk size info */ | |
2375 | drive_info->nr_blocks = 0; | |
2376 | drive_info->block_size = 0; | |
2377 | drive_info->heads = 0; | |
2378 | drive_info->sectors = 0; | |
2379 | drive_info->cylinders = 0; | |
2380 | drive_info->raid_level = -1; | |
2381 | memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no)); | |
2382 | memset(drive_info->model, 0, sizeof(drive_info->model)); | |
2383 | memset(drive_info->rev, 0, sizeof(drive_info->rev)); | |
2384 | memset(drive_info->vendor, 0, sizeof(drive_info->vendor)); | |
2385 | /* | |
2386 | * don't clear the LUNID though, we need to remember which | |
2387 | * one this one is. | |
2388 | */ | |
2389 | } | |
2390 | ||
2391 | /* This function will deregister the disk and it's queue from the | |
2392 | * kernel. It must be called with the controller lock held and the | |
2393 | * drv structures busy_configuring flag set. It's parameters are: | |
2394 | * | |
2395 | * disk = This is the disk to be deregistered | |
2396 | * drv = This is the drive_info_struct associated with the disk to be | |
2397 | * deregistered. It contains information about the disk used | |
2398 | * by the driver. | |
2399 | * clear_all = This flag determines whether or not the disk information | |
2400 | * is going to be completely cleared out and the highest_lun | |
2401 | * reset. Sometimes we want to clear out information about | |
2402 | * the disk in preparation for re-adding it. In this case | |
2403 | * the highest_lun should be left unchanged and the LunID | |
2404 | * should not be cleared. | |
2405 | * via_ioctl | |
2406 | * This indicates whether we've reached this path via ioctl. | |
2407 | * This affects the maximum usage count allowed for c0d0 to be messed with. | |
2408 | * If this path is reached via ioctl(), then the max_usage_count will | |
2409 | * be 1, as the process calling ioctl() has got to have the device open. | |
2410 | * If we get here via sysfs, then the max usage count will be zero. | |
2411 | */ | |
2412 | static int deregister_disk(ctlr_info_t *h, int drv_index, | |
2413 | int clear_all, int via_ioctl) | |
2414 | { | |
2415 | int i; | |
2416 | struct gendisk *disk; | |
2417 | drive_info_struct *drv; | |
2418 | int recalculate_highest_lun; | |
2419 | ||
2420 | if (!capable(CAP_SYS_RAWIO)) | |
2421 | return -EPERM; | |
2422 | ||
2423 | drv = h->drv[drv_index]; | |
2424 | disk = h->gendisk[drv_index]; | |
2425 | ||
2426 | /* make sure logical volume is NOT is use */ | |
2427 | if (clear_all || (h->gendisk[0] == disk)) { | |
2428 | if (drv->usage_count > via_ioctl) | |
2429 | return -EBUSY; | |
2430 | } else if (drv->usage_count > 0) | |
2431 | return -EBUSY; | |
2432 | ||
2433 | recalculate_highest_lun = (drv == h->drv[h->highest_lun]); | |
2434 | ||
2435 | /* invalidate the devices and deregister the disk. If it is disk | |
2436 | * zero do not deregister it but just zero out it's values. This | |
2437 | * allows us to delete disk zero but keep the controller registered. | |
2438 | */ | |
2439 | if (h->gendisk[0] != disk) { | |
2440 | struct request_queue *q = disk->queue; | |
2441 | if (disk->flags & GENHD_FL_UP) { | |
2442 | cciss_destroy_ld_sysfs_entry(h, drv_index, 0); | |
2443 | del_gendisk(disk); | |
2444 | } | |
2445 | if (q) | |
2446 | blk_cleanup_queue(q); | |
2447 | /* If clear_all is set then we are deleting the logical | |
2448 | * drive, not just refreshing its info. For drives | |
2449 | * other than disk 0 we will call put_disk. We do not | |
2450 | * do this for disk 0 as we need it to be able to | |
2451 | * configure the controller. | |
2452 | */ | |
2453 | if (clear_all){ | |
2454 | /* This isn't pretty, but we need to find the | |
2455 | * disk in our array and NULL our the pointer. | |
2456 | * This is so that we will call alloc_disk if | |
2457 | * this index is used again later. | |
2458 | */ | |
2459 | for (i=0; i < CISS_MAX_LUN; i++){ | |
2460 | if (h->gendisk[i] == disk) { | |
2461 | h->gendisk[i] = NULL; | |
2462 | break; | |
2463 | } | |
2464 | } | |
2465 | put_disk(disk); | |
2466 | } | |
2467 | } else { | |
2468 | set_capacity(disk, 0); | |
2469 | cciss_clear_drive_info(drv); | |
2470 | } | |
2471 | ||
2472 | --h->num_luns; | |
2473 | ||
2474 | /* if it was the last disk, find the new hightest lun */ | |
2475 | if (clear_all && recalculate_highest_lun) { | |
2476 | int newhighest = -1; | |
2477 | for (i = 0; i <= h->highest_lun; i++) { | |
2478 | /* if the disk has size > 0, it is available */ | |
2479 | if (h->drv[i] && h->drv[i]->heads) | |
2480 | newhighest = i; | |
2481 | } | |
2482 | h->highest_lun = newhighest; | |
2483 | } | |
2484 | return 0; | |
2485 | } | |
2486 | ||
2487 | static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff, | |
2488 | size_t size, __u8 page_code, unsigned char *scsi3addr, | |
2489 | int cmd_type) | |
2490 | { | |
2491 | u64bit buff_dma_handle; | |
2492 | int status = IO_OK; | |
2493 | ||
2494 | c->cmd_type = CMD_IOCTL_PEND; | |
2495 | c->Header.ReplyQueue = 0; | |
2496 | if (buff != NULL) { | |
2497 | c->Header.SGList = 1; | |
2498 | c->Header.SGTotal = 1; | |
2499 | } else { | |
2500 | c->Header.SGList = 0; | |
2501 | c->Header.SGTotal = 0; | |
2502 | } | |
2503 | c->Header.Tag.lower = c->busaddr; | |
2504 | memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); | |
2505 | ||
2506 | c->Request.Type.Type = cmd_type; | |
2507 | if (cmd_type == TYPE_CMD) { | |
2508 | switch (cmd) { | |
2509 | case CISS_INQUIRY: | |
2510 | /* are we trying to read a vital product page */ | |
2511 | if (page_code != 0) { | |
2512 | c->Request.CDB[1] = 0x01; | |
2513 | c->Request.CDB[2] = page_code; | |
2514 | } | |
2515 | c->Request.CDBLen = 6; | |
2516 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2517 | c->Request.Type.Direction = XFER_READ; | |
2518 | c->Request.Timeout = 0; | |
2519 | c->Request.CDB[0] = CISS_INQUIRY; | |
2520 | c->Request.CDB[4] = size & 0xFF; | |
2521 | break; | |
2522 | case CISS_REPORT_LOG: | |
2523 | case CISS_REPORT_PHYS: | |
2524 | /* Talking to controller so It's a physical command | |
2525 | mode = 00 target = 0. Nothing to write. | |
2526 | */ | |
2527 | c->Request.CDBLen = 12; | |
2528 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2529 | c->Request.Type.Direction = XFER_READ; | |
2530 | c->Request.Timeout = 0; | |
2531 | c->Request.CDB[0] = cmd; | |
2532 | c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */ | |
2533 | c->Request.CDB[7] = (size >> 16) & 0xFF; | |
2534 | c->Request.CDB[8] = (size >> 8) & 0xFF; | |
2535 | c->Request.CDB[9] = size & 0xFF; | |
2536 | break; | |
2537 | ||
2538 | case CCISS_READ_CAPACITY: | |
2539 | c->Request.CDBLen = 10; | |
2540 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2541 | c->Request.Type.Direction = XFER_READ; | |
2542 | c->Request.Timeout = 0; | |
2543 | c->Request.CDB[0] = cmd; | |
2544 | break; | |
2545 | case CCISS_READ_CAPACITY_16: | |
2546 | c->Request.CDBLen = 16; | |
2547 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2548 | c->Request.Type.Direction = XFER_READ; | |
2549 | c->Request.Timeout = 0; | |
2550 | c->Request.CDB[0] = cmd; | |
2551 | c->Request.CDB[1] = 0x10; | |
2552 | c->Request.CDB[10] = (size >> 24) & 0xFF; | |
2553 | c->Request.CDB[11] = (size >> 16) & 0xFF; | |
2554 | c->Request.CDB[12] = (size >> 8) & 0xFF; | |
2555 | c->Request.CDB[13] = size & 0xFF; | |
2556 | c->Request.Timeout = 0; | |
2557 | c->Request.CDB[0] = cmd; | |
2558 | break; | |
2559 | case CCISS_CACHE_FLUSH: | |
2560 | c->Request.CDBLen = 12; | |
2561 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2562 | c->Request.Type.Direction = XFER_WRITE; | |
2563 | c->Request.Timeout = 0; | |
2564 | c->Request.CDB[0] = BMIC_WRITE; | |
2565 | c->Request.CDB[6] = BMIC_CACHE_FLUSH; | |
2566 | break; | |
2567 | case TEST_UNIT_READY: | |
2568 | c->Request.CDBLen = 6; | |
2569 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2570 | c->Request.Type.Direction = XFER_NONE; | |
2571 | c->Request.Timeout = 0; | |
2572 | break; | |
2573 | default: | |
2574 | dev_warn(&h->pdev->dev, "Unknown Command 0x%c\n", cmd); | |
2575 | return IO_ERROR; | |
2576 | } | |
2577 | } else if (cmd_type == TYPE_MSG) { | |
2578 | switch (cmd) { | |
2579 | case 0: /* ABORT message */ | |
2580 | c->Request.CDBLen = 12; | |
2581 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2582 | c->Request.Type.Direction = XFER_WRITE; | |
2583 | c->Request.Timeout = 0; | |
2584 | c->Request.CDB[0] = cmd; /* abort */ | |
2585 | c->Request.CDB[1] = 0; /* abort a command */ | |
2586 | /* buff contains the tag of the command to abort */ | |
2587 | memcpy(&c->Request.CDB[4], buff, 8); | |
2588 | break; | |
2589 | case 1: /* RESET message */ | |
2590 | c->Request.CDBLen = 16; | |
2591 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2592 | c->Request.Type.Direction = XFER_NONE; | |
2593 | c->Request.Timeout = 0; | |
2594 | memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); | |
2595 | c->Request.CDB[0] = cmd; /* reset */ | |
2596 | c->Request.CDB[1] = 0x03; /* reset a target */ | |
2597 | break; | |
2598 | case 3: /* No-Op message */ | |
2599 | c->Request.CDBLen = 1; | |
2600 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
2601 | c->Request.Type.Direction = XFER_WRITE; | |
2602 | c->Request.Timeout = 0; | |
2603 | c->Request.CDB[0] = cmd; | |
2604 | break; | |
2605 | default: | |
2606 | dev_warn(&h->pdev->dev, | |
2607 | "unknown message type %d\n", cmd); | |
2608 | return IO_ERROR; | |
2609 | } | |
2610 | } else { | |
2611 | dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type); | |
2612 | return IO_ERROR; | |
2613 | } | |
2614 | /* Fill in the scatter gather information */ | |
2615 | if (size > 0) { | |
2616 | buff_dma_handle.val = (__u64) pci_map_single(h->pdev, | |
2617 | buff, size, | |
2618 | PCI_DMA_BIDIRECTIONAL); | |
2619 | c->SG[0].Addr.lower = buff_dma_handle.val32.lower; | |
2620 | c->SG[0].Addr.upper = buff_dma_handle.val32.upper; | |
2621 | c->SG[0].Len = size; | |
2622 | c->SG[0].Ext = 0; /* we are not chaining */ | |
2623 | } | |
2624 | return status; | |
2625 | } | |
2626 | ||
2627 | static int check_target_status(ctlr_info_t *h, CommandList_struct *c) | |
2628 | { | |
2629 | switch (c->err_info->ScsiStatus) { | |
2630 | case SAM_STAT_GOOD: | |
2631 | return IO_OK; | |
2632 | case SAM_STAT_CHECK_CONDITION: | |
2633 | switch (0xf & c->err_info->SenseInfo[2]) { | |
2634 | case 0: return IO_OK; /* no sense */ | |
2635 | case 1: return IO_OK; /* recovered error */ | |
2636 | default: | |
2637 | if (check_for_unit_attention(h, c)) | |
2638 | return IO_NEEDS_RETRY; | |
2639 | dev_warn(&h->pdev->dev, "cmd 0x%02x " | |
2640 | "check condition, sense key = 0x%02x\n", | |
2641 | c->Request.CDB[0], c->err_info->SenseInfo[2]); | |
2642 | } | |
2643 | break; | |
2644 | default: | |
2645 | dev_warn(&h->pdev->dev, "cmd 0x%02x" | |
2646 | "scsi status = 0x%02x\n", | |
2647 | c->Request.CDB[0], c->err_info->ScsiStatus); | |
2648 | break; | |
2649 | } | |
2650 | return IO_ERROR; | |
2651 | } | |
2652 | ||
2653 | static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c) | |
2654 | { | |
2655 | int return_status = IO_OK; | |
2656 | ||
2657 | if (c->err_info->CommandStatus == CMD_SUCCESS) | |
2658 | return IO_OK; | |
2659 | ||
2660 | switch (c->err_info->CommandStatus) { | |
2661 | case CMD_TARGET_STATUS: | |
2662 | return_status = check_target_status(h, c); | |
2663 | break; | |
2664 | case CMD_DATA_UNDERRUN: | |
2665 | case CMD_DATA_OVERRUN: | |
2666 | /* expected for inquiry and report lun commands */ | |
2667 | break; | |
2668 | case CMD_INVALID: | |
2669 | dev_warn(&h->pdev->dev, "cmd 0x%02x is " | |
2670 | "reported invalid\n", c->Request.CDB[0]); | |
2671 | return_status = IO_ERROR; | |
2672 | break; | |
2673 | case CMD_PROTOCOL_ERR: | |
2674 | dev_warn(&h->pdev->dev, "cmd 0x%02x has " | |
2675 | "protocol error\n", c->Request.CDB[0]); | |
2676 | return_status = IO_ERROR; | |
2677 | break; | |
2678 | case CMD_HARDWARE_ERR: | |
2679 | dev_warn(&h->pdev->dev, "cmd 0x%02x had " | |
2680 | " hardware error\n", c->Request.CDB[0]); | |
2681 | return_status = IO_ERROR; | |
2682 | break; | |
2683 | case CMD_CONNECTION_LOST: | |
2684 | dev_warn(&h->pdev->dev, "cmd 0x%02x had " | |
2685 | "connection lost\n", c->Request.CDB[0]); | |
2686 | return_status = IO_ERROR; | |
2687 | break; | |
2688 | case CMD_ABORTED: | |
2689 | dev_warn(&h->pdev->dev, "cmd 0x%02x was " | |
2690 | "aborted\n", c->Request.CDB[0]); | |
2691 | return_status = IO_ERROR; | |
2692 | break; | |
2693 | case CMD_ABORT_FAILED: | |
2694 | dev_warn(&h->pdev->dev, "cmd 0x%02x reports " | |
2695 | "abort failed\n", c->Request.CDB[0]); | |
2696 | return_status = IO_ERROR; | |
2697 | break; | |
2698 | case CMD_UNSOLICITED_ABORT: | |
2699 | dev_warn(&h->pdev->dev, "unsolicited abort 0x%02x\n", | |
2700 | c->Request.CDB[0]); | |
2701 | return_status = IO_NEEDS_RETRY; | |
2702 | break; | |
2703 | default: | |
2704 | dev_warn(&h->pdev->dev, "cmd 0x%02x returned " | |
2705 | "unknown status %x\n", c->Request.CDB[0], | |
2706 | c->err_info->CommandStatus); | |
2707 | return_status = IO_ERROR; | |
2708 | } | |
2709 | return return_status; | |
2710 | } | |
2711 | ||
2712 | static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, | |
2713 | int attempt_retry) | |
2714 | { | |
2715 | DECLARE_COMPLETION_ONSTACK(wait); | |
2716 | u64bit buff_dma_handle; | |
2717 | int return_status = IO_OK; | |
2718 | ||
2719 | resend_cmd2: | |
2720 | c->waiting = &wait; | |
2721 | enqueue_cmd_and_start_io(h, c); | |
2722 | ||
2723 | wait_for_completion(&wait); | |
2724 | ||
2725 | if (c->err_info->CommandStatus == 0 || !attempt_retry) | |
2726 | goto command_done; | |
2727 | ||
2728 | return_status = process_sendcmd_error(h, c); | |
2729 | ||
2730 | if (return_status == IO_NEEDS_RETRY && | |
2731 | c->retry_count < MAX_CMD_RETRIES) { | |
2732 | dev_warn(&h->pdev->dev, "retrying 0x%02x\n", | |
2733 | c->Request.CDB[0]); | |
2734 | c->retry_count++; | |
2735 | /* erase the old error information */ | |
2736 | memset(c->err_info, 0, sizeof(ErrorInfo_struct)); | |
2737 | return_status = IO_OK; | |
2738 | INIT_COMPLETION(wait); | |
2739 | goto resend_cmd2; | |
2740 | } | |
2741 | ||
2742 | command_done: | |
2743 | /* unlock the buffers from DMA */ | |
2744 | buff_dma_handle.val32.lower = c->SG[0].Addr.lower; | |
2745 | buff_dma_handle.val32.upper = c->SG[0].Addr.upper; | |
2746 | pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, | |
2747 | c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); | |
2748 | return return_status; | |
2749 | } | |
2750 | ||
2751 | static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size, | |
2752 | __u8 page_code, unsigned char scsi3addr[], | |
2753 | int cmd_type) | |
2754 | { | |
2755 | CommandList_struct *c; | |
2756 | int return_status; | |
2757 | ||
2758 | c = cmd_special_alloc(h); | |
2759 | if (!c) | |
2760 | return -ENOMEM; | |
2761 | return_status = fill_cmd(h, c, cmd, buff, size, page_code, | |
2762 | scsi3addr, cmd_type); | |
2763 | if (return_status == IO_OK) | |
2764 | return_status = sendcmd_withirq_core(h, c, 1); | |
2765 | ||
2766 | cmd_special_free(h, c); | |
2767 | return return_status; | |
2768 | } | |
2769 | ||
2770 | static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol, | |
2771 | sector_t total_size, | |
2772 | unsigned int block_size, | |
2773 | InquiryData_struct *inq_buff, | |
2774 | drive_info_struct *drv) | |
2775 | { | |
2776 | int return_code; | |
2777 | unsigned long t; | |
2778 | unsigned char scsi3addr[8]; | |
2779 | ||
2780 | memset(inq_buff, 0, sizeof(InquiryData_struct)); | |
2781 | log_unit_to_scsi3addr(h, scsi3addr, logvol); | |
2782 | return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff, | |
2783 | sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD); | |
2784 | if (return_code == IO_OK) { | |
2785 | if (inq_buff->data_byte[8] == 0xFF) { | |
2786 | dev_warn(&h->pdev->dev, | |
2787 | "reading geometry failed, volume " | |
2788 | "does not support reading geometry\n"); | |
2789 | drv->heads = 255; | |
2790 | drv->sectors = 32; /* Sectors per track */ | |
2791 | drv->cylinders = total_size + 1; | |
2792 | drv->raid_level = RAID_UNKNOWN; | |
2793 | } else { | |
2794 | drv->heads = inq_buff->data_byte[6]; | |
2795 | drv->sectors = inq_buff->data_byte[7]; | |
2796 | drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8; | |
2797 | drv->cylinders += inq_buff->data_byte[5]; | |
2798 | drv->raid_level = inq_buff->data_byte[8]; | |
2799 | } | |
2800 | drv->block_size = block_size; | |
2801 | drv->nr_blocks = total_size + 1; | |
2802 | t = drv->heads * drv->sectors; | |
2803 | if (t > 1) { | |
2804 | sector_t real_size = total_size + 1; | |
2805 | unsigned long rem = sector_div(real_size, t); | |
2806 | if (rem) | |
2807 | real_size++; | |
2808 | drv->cylinders = real_size; | |
2809 | } | |
2810 | } else { /* Get geometry failed */ | |
2811 | dev_warn(&h->pdev->dev, "reading geometry failed\n"); | |
2812 | } | |
2813 | } | |
2814 | ||
2815 | static void | |
2816 | cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size, | |
2817 | unsigned int *block_size) | |
2818 | { | |
2819 | ReadCapdata_struct *buf; | |
2820 | int return_code; | |
2821 | unsigned char scsi3addr[8]; | |
2822 | ||
2823 | buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL); | |
2824 | if (!buf) { | |
2825 | dev_warn(&h->pdev->dev, "out of memory\n"); | |
2826 | return; | |
2827 | } | |
2828 | ||
2829 | log_unit_to_scsi3addr(h, scsi3addr, logvol); | |
2830 | return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY, buf, | |
2831 | sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD); | |
2832 | if (return_code == IO_OK) { | |
2833 | *total_size = be32_to_cpu(*(__be32 *) buf->total_size); | |
2834 | *block_size = be32_to_cpu(*(__be32 *) buf->block_size); | |
2835 | } else { /* read capacity command failed */ | |
2836 | dev_warn(&h->pdev->dev, "read capacity failed\n"); | |
2837 | *total_size = 0; | |
2838 | *block_size = BLOCK_SIZE; | |
2839 | } | |
2840 | kfree(buf); | |
2841 | } | |
2842 | ||
2843 | static void cciss_read_capacity_16(ctlr_info_t *h, int logvol, | |
2844 | sector_t *total_size, unsigned int *block_size) | |
2845 | { | |
2846 | ReadCapdata_struct_16 *buf; | |
2847 | int return_code; | |
2848 | unsigned char scsi3addr[8]; | |
2849 | ||
2850 | buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL); | |
2851 | if (!buf) { | |
2852 | dev_warn(&h->pdev->dev, "out of memory\n"); | |
2853 | return; | |
2854 | } | |
2855 | ||
2856 | log_unit_to_scsi3addr(h, scsi3addr, logvol); | |
2857 | return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY_16, | |
2858 | buf, sizeof(ReadCapdata_struct_16), | |
2859 | 0, scsi3addr, TYPE_CMD); | |
2860 | if (return_code == IO_OK) { | |
2861 | *total_size = be64_to_cpu(*(__be64 *) buf->total_size); | |
2862 | *block_size = be32_to_cpu(*(__be32 *) buf->block_size); | |
2863 | } else { /* read capacity command failed */ | |
2864 | dev_warn(&h->pdev->dev, "read capacity failed\n"); | |
2865 | *total_size = 0; | |
2866 | *block_size = BLOCK_SIZE; | |
2867 | } | |
2868 | dev_info(&h->pdev->dev, " blocks= %llu block_size= %d\n", | |
2869 | (unsigned long long)*total_size+1, *block_size); | |
2870 | kfree(buf); | |
2871 | } | |
2872 | ||
2873 | static int cciss_revalidate(struct gendisk *disk) | |
2874 | { | |
2875 | ctlr_info_t *h = get_host(disk); | |
2876 | drive_info_struct *drv = get_drv(disk); | |
2877 | int logvol; | |
2878 | int FOUND = 0; | |
2879 | unsigned int block_size; | |
2880 | sector_t total_size; | |
2881 | InquiryData_struct *inq_buff = NULL; | |
2882 | ||
2883 | for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { | |
2884 | if (memcmp(h->drv[logvol]->LunID, drv->LunID, | |
2885 | sizeof(drv->LunID)) == 0) { | |
2886 | FOUND = 1; | |
2887 | break; | |
2888 | } | |
2889 | } | |
2890 | ||
2891 | if (!FOUND) | |
2892 | return 1; | |
2893 | ||
2894 | inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); | |
2895 | if (inq_buff == NULL) { | |
2896 | dev_warn(&h->pdev->dev, "out of memory\n"); | |
2897 | return 1; | |
2898 | } | |
2899 | if (h->cciss_read == CCISS_READ_10) { | |
2900 | cciss_read_capacity(h, logvol, | |
2901 | &total_size, &block_size); | |
2902 | } else { | |
2903 | cciss_read_capacity_16(h, logvol, | |
2904 | &total_size, &block_size); | |
2905 | } | |
2906 | cciss_geometry_inquiry(h, logvol, total_size, block_size, | |
2907 | inq_buff, drv); | |
2908 | ||
2909 | blk_queue_logical_block_size(drv->queue, drv->block_size); | |
2910 | set_capacity(disk, drv->nr_blocks); | |
2911 | ||
2912 | kfree(inq_buff); | |
2913 | return 0; | |
2914 | } | |
2915 | ||
2916 | /* | |
2917 | * Map (physical) PCI mem into (virtual) kernel space | |
2918 | */ | |
2919 | static void __iomem *remap_pci_mem(ulong base, ulong size) | |
2920 | { | |
2921 | ulong page_base = ((ulong) base) & PAGE_MASK; | |
2922 | ulong page_offs = ((ulong) base) - page_base; | |
2923 | void __iomem *page_remapped = ioremap(page_base, page_offs + size); | |
2924 | ||
2925 | return page_remapped ? (page_remapped + page_offs) : NULL; | |
2926 | } | |
2927 | ||
2928 | /* | |
2929 | * Takes jobs of the Q and sends them to the hardware, then puts it on | |
2930 | * the Q to wait for completion. | |
2931 | */ | |
2932 | static void start_io(ctlr_info_t *h) | |
2933 | { | |
2934 | CommandList_struct *c; | |
2935 | ||
2936 | while (!hlist_empty(&h->reqQ)) { | |
2937 | c = hlist_entry(h->reqQ.first, CommandList_struct, list); | |
2938 | /* can't do anything if fifo is full */ | |
2939 | if ((h->access.fifo_full(h))) { | |
2940 | dev_warn(&h->pdev->dev, "fifo full\n"); | |
2941 | break; | |
2942 | } | |
2943 | ||
2944 | /* Get the first entry from the Request Q */ | |
2945 | removeQ(c); | |
2946 | h->Qdepth--; | |
2947 | ||
2948 | /* Tell the controller execute command */ | |
2949 | h->access.submit_command(h, c); | |
2950 | ||
2951 | /* Put job onto the completed Q */ | |
2952 | addQ(&h->cmpQ, c); | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | /* Assumes that h->lock is held. */ | |
2957 | /* Zeros out the error record and then resends the command back */ | |
2958 | /* to the controller */ | |
2959 | static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c) | |
2960 | { | |
2961 | /* erase the old error information */ | |
2962 | memset(c->err_info, 0, sizeof(ErrorInfo_struct)); | |
2963 | ||
2964 | /* add it to software queue and then send it to the controller */ | |
2965 | addQ(&h->reqQ, c); | |
2966 | h->Qdepth++; | |
2967 | if (h->Qdepth > h->maxQsinceinit) | |
2968 | h->maxQsinceinit = h->Qdepth; | |
2969 | ||
2970 | start_io(h); | |
2971 | } | |
2972 | ||
2973 | static inline unsigned int make_status_bytes(unsigned int scsi_status_byte, | |
2974 | unsigned int msg_byte, unsigned int host_byte, | |
2975 | unsigned int driver_byte) | |
2976 | { | |
2977 | /* inverse of macros in scsi.h */ | |
2978 | return (scsi_status_byte & 0xff) | | |
2979 | ((msg_byte & 0xff) << 8) | | |
2980 | ((host_byte & 0xff) << 16) | | |
2981 | ((driver_byte & 0xff) << 24); | |
2982 | } | |
2983 | ||
2984 | static inline int evaluate_target_status(ctlr_info_t *h, | |
2985 | CommandList_struct *cmd, int *retry_cmd) | |
2986 | { | |
2987 | unsigned char sense_key; | |
2988 | unsigned char status_byte, msg_byte, host_byte, driver_byte; | |
2989 | int error_value; | |
2990 | ||
2991 | *retry_cmd = 0; | |
2992 | /* If we get in here, it means we got "target status", that is, scsi status */ | |
2993 | status_byte = cmd->err_info->ScsiStatus; | |
2994 | driver_byte = DRIVER_OK; | |
2995 | msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */ | |
2996 | ||
2997 | if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) | |
2998 | host_byte = DID_PASSTHROUGH; | |
2999 | else | |
3000 | host_byte = DID_OK; | |
3001 | ||
3002 | error_value = make_status_bytes(status_byte, msg_byte, | |
3003 | host_byte, driver_byte); | |
3004 | ||
3005 | if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) { | |
3006 | if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) | |
3007 | dev_warn(&h->pdev->dev, "cmd %p " | |
3008 | "has SCSI Status 0x%x\n", | |
3009 | cmd, cmd->err_info->ScsiStatus); | |
3010 | return error_value; | |
3011 | } | |
3012 | ||
3013 | /* check the sense key */ | |
3014 | sense_key = 0xf & cmd->err_info->SenseInfo[2]; | |
3015 | /* no status or recovered error */ | |
3016 | if (((sense_key == 0x0) || (sense_key == 0x1)) && | |
3017 | (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)) | |
3018 | error_value = 0; | |
3019 | ||
3020 | if (check_for_unit_attention(h, cmd)) { | |
3021 | *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC); | |
3022 | return 0; | |
3023 | } | |
3024 | ||
3025 | /* Not SG_IO or similar? */ | |
3026 | if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) { | |
3027 | if (error_value != 0) | |
3028 | dev_warn(&h->pdev->dev, "cmd %p has CHECK CONDITION" | |
3029 | " sense key = 0x%x\n", cmd, sense_key); | |
3030 | return error_value; | |
3031 | } | |
3032 | ||
3033 | /* SG_IO or similar, copy sense data back */ | |
3034 | if (cmd->rq->sense) { | |
3035 | if (cmd->rq->sense_len > cmd->err_info->SenseLen) | |
3036 | cmd->rq->sense_len = cmd->err_info->SenseLen; | |
3037 | memcpy(cmd->rq->sense, cmd->err_info->SenseInfo, | |
3038 | cmd->rq->sense_len); | |
3039 | } else | |
3040 | cmd->rq->sense_len = 0; | |
3041 | ||
3042 | return error_value; | |
3043 | } | |
3044 | ||
3045 | /* checks the status of the job and calls complete buffers to mark all | |
3046 | * buffers for the completed job. Note that this function does not need | |
3047 | * to hold the hba/queue lock. | |
3048 | */ | |
3049 | static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd, | |
3050 | int timeout) | |
3051 | { | |
3052 | int retry_cmd = 0; | |
3053 | struct request *rq = cmd->rq; | |
3054 | ||
3055 | rq->errors = 0; | |
3056 | ||
3057 | if (timeout) | |
3058 | rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT); | |
3059 | ||
3060 | if (cmd->err_info->CommandStatus == 0) /* no error has occurred */ | |
3061 | goto after_error_processing; | |
3062 | ||
3063 | switch (cmd->err_info->CommandStatus) { | |
3064 | case CMD_TARGET_STATUS: | |
3065 | rq->errors = evaluate_target_status(h, cmd, &retry_cmd); | |
3066 | break; | |
3067 | case CMD_DATA_UNDERRUN: | |
3068 | if (cmd->rq->cmd_type == REQ_TYPE_FS) { | |
3069 | dev_warn(&h->pdev->dev, "cmd %p has" | |
3070 | " completed with data underrun " | |
3071 | "reported\n", cmd); | |
3072 | cmd->rq->resid_len = cmd->err_info->ResidualCnt; | |
3073 | } | |
3074 | break; | |
3075 | case CMD_DATA_OVERRUN: | |
3076 | if (cmd->rq->cmd_type == REQ_TYPE_FS) | |
3077 | dev_warn(&h->pdev->dev, "cciss: cmd %p has" | |
3078 | " completed with data overrun " | |
3079 | "reported\n", cmd); | |
3080 | break; | |
3081 | case CMD_INVALID: | |
3082 | dev_warn(&h->pdev->dev, "cciss: cmd %p is " | |
3083 | "reported invalid\n", cmd); | |
3084 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3085 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3086 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3087 | DID_PASSTHROUGH : DID_ERROR); | |
3088 | break; | |
3089 | case CMD_PROTOCOL_ERR: | |
3090 | dev_warn(&h->pdev->dev, "cciss: cmd %p has " | |
3091 | "protocol error\n", cmd); | |
3092 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3093 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3094 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3095 | DID_PASSTHROUGH : DID_ERROR); | |
3096 | break; | |
3097 | case CMD_HARDWARE_ERR: | |
3098 | dev_warn(&h->pdev->dev, "cciss: cmd %p had " | |
3099 | " hardware error\n", cmd); | |
3100 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3101 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3102 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3103 | DID_PASSTHROUGH : DID_ERROR); | |
3104 | break; | |
3105 | case CMD_CONNECTION_LOST: | |
3106 | dev_warn(&h->pdev->dev, "cciss: cmd %p had " | |
3107 | "connection lost\n", cmd); | |
3108 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3109 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3110 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3111 | DID_PASSTHROUGH : DID_ERROR); | |
3112 | break; | |
3113 | case CMD_ABORTED: | |
3114 | dev_warn(&h->pdev->dev, "cciss: cmd %p was " | |
3115 | "aborted\n", cmd); | |
3116 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3117 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3118 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3119 | DID_PASSTHROUGH : DID_ABORT); | |
3120 | break; | |
3121 | case CMD_ABORT_FAILED: | |
3122 | dev_warn(&h->pdev->dev, "cciss: cmd %p reports " | |
3123 | "abort failed\n", cmd); | |
3124 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3125 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3126 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3127 | DID_PASSTHROUGH : DID_ERROR); | |
3128 | break; | |
3129 | case CMD_UNSOLICITED_ABORT: | |
3130 | dev_warn(&h->pdev->dev, "cciss%d: unsolicited " | |
3131 | "abort %p\n", h->ctlr, cmd); | |
3132 | if (cmd->retry_count < MAX_CMD_RETRIES) { | |
3133 | retry_cmd = 1; | |
3134 | dev_warn(&h->pdev->dev, "retrying %p\n", cmd); | |
3135 | cmd->retry_count++; | |
3136 | } else | |
3137 | dev_warn(&h->pdev->dev, | |
3138 | "%p retried too many times\n", cmd); | |
3139 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3140 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3141 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3142 | DID_PASSTHROUGH : DID_ABORT); | |
3143 | break; | |
3144 | case CMD_TIMEOUT: | |
3145 | dev_warn(&h->pdev->dev, "cmd %p timedout\n", cmd); | |
3146 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3147 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3148 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3149 | DID_PASSTHROUGH : DID_ERROR); | |
3150 | break; | |
3151 | default: | |
3152 | dev_warn(&h->pdev->dev, "cmd %p returned " | |
3153 | "unknown status %x\n", cmd, | |
3154 | cmd->err_info->CommandStatus); | |
3155 | rq->errors = make_status_bytes(SAM_STAT_GOOD, | |
3156 | cmd->err_info->CommandStatus, DRIVER_OK, | |
3157 | (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ? | |
3158 | DID_PASSTHROUGH : DID_ERROR); | |
3159 | } | |
3160 | ||
3161 | after_error_processing: | |
3162 | ||
3163 | /* We need to return this command */ | |
3164 | if (retry_cmd) { | |
3165 | resend_cciss_cmd(h, cmd); | |
3166 | return; | |
3167 | } | |
3168 | cmd->rq->completion_data = cmd; | |
3169 | blk_complete_request(cmd->rq); | |
3170 | } | |
3171 | ||
3172 | static inline u32 cciss_tag_contains_index(u32 tag) | |
3173 | { | |
3174 | #define DIRECT_LOOKUP_BIT 0x10 | |
3175 | return tag & DIRECT_LOOKUP_BIT; | |
3176 | } | |
3177 | ||
3178 | static inline u32 cciss_tag_to_index(u32 tag) | |
3179 | { | |
3180 | #define DIRECT_LOOKUP_SHIFT 5 | |
3181 | return tag >> DIRECT_LOOKUP_SHIFT; | |
3182 | } | |
3183 | ||
3184 | static inline u32 cciss_tag_discard_error_bits(u32 tag) | |
3185 | { | |
3186 | #define CCISS_ERROR_BITS 0x03 | |
3187 | return tag & ~CCISS_ERROR_BITS; | |
3188 | } | |
3189 | ||
3190 | static inline void cciss_mark_tag_indexed(u32 *tag) | |
3191 | { | |
3192 | *tag |= DIRECT_LOOKUP_BIT; | |
3193 | } | |
3194 | ||
3195 | static inline void cciss_set_tag_index(u32 *tag, u32 index) | |
3196 | { | |
3197 | *tag |= (index << DIRECT_LOOKUP_SHIFT); | |
3198 | } | |
3199 | ||
3200 | /* | |
3201 | * Get a request and submit it to the controller. | |
3202 | */ | |
3203 | static void do_cciss_request(struct request_queue *q) | |
3204 | { | |
3205 | ctlr_info_t *h = q->queuedata; | |
3206 | CommandList_struct *c; | |
3207 | sector_t start_blk; | |
3208 | int seg; | |
3209 | struct request *creq; | |
3210 | u64bit temp64; | |
3211 | struct scatterlist *tmp_sg; | |
3212 | SGDescriptor_struct *curr_sg; | |
3213 | drive_info_struct *drv; | |
3214 | int i, dir; | |
3215 | int sg_index = 0; | |
3216 | int chained = 0; | |
3217 | ||
3218 | /* We call start_io here in case there is a command waiting on the | |
3219 | * queue that has not been sent. | |
3220 | */ | |
3221 | if (blk_queue_plugged(q)) | |
3222 | goto startio; | |
3223 | ||
3224 | queue: | |
3225 | creq = blk_peek_request(q); | |
3226 | if (!creq) | |
3227 | goto startio; | |
3228 | ||
3229 | BUG_ON(creq->nr_phys_segments > h->maxsgentries); | |
3230 | ||
3231 | c = cmd_alloc(h); | |
3232 | if (!c) | |
3233 | goto full; | |
3234 | ||
3235 | blk_start_request(creq); | |
3236 | ||
3237 | tmp_sg = h->scatter_list[c->cmdindex]; | |
3238 | spin_unlock_irq(q->queue_lock); | |
3239 | ||
3240 | c->cmd_type = CMD_RWREQ; | |
3241 | c->rq = creq; | |
3242 | ||
3243 | /* fill in the request */ | |
3244 | drv = creq->rq_disk->private_data; | |
3245 | c->Header.ReplyQueue = 0; /* unused in simple mode */ | |
3246 | /* got command from pool, so use the command block index instead */ | |
3247 | /* for direct lookups. */ | |
3248 | /* The first 2 bits are reserved for controller error reporting. */ | |
3249 | cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex); | |
3250 | cciss_mark_tag_indexed(&c->Header.Tag.lower); | |
3251 | memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID)); | |
3252 | c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */ | |
3253 | c->Request.Type.Type = TYPE_CMD; /* It is a command. */ | |
3254 | c->Request.Type.Attribute = ATTR_SIMPLE; | |
3255 | c->Request.Type.Direction = | |
3256 | (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE; | |
3257 | c->Request.Timeout = 0; /* Don't time out */ | |
3258 | c->Request.CDB[0] = | |
3259 | (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write; | |
3260 | start_blk = blk_rq_pos(creq); | |
3261 | dev_dbg(&h->pdev->dev, "sector =%d nr_sectors=%d\n", | |
3262 | (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq)); | |
3263 | sg_init_table(tmp_sg, h->maxsgentries); | |
3264 | seg = blk_rq_map_sg(q, creq, tmp_sg); | |
3265 | ||
3266 | /* get the DMA records for the setup */ | |
3267 | if (c->Request.Type.Direction == XFER_READ) | |
3268 | dir = PCI_DMA_FROMDEVICE; | |
3269 | else | |
3270 | dir = PCI_DMA_TODEVICE; | |
3271 | ||
3272 | curr_sg = c->SG; | |
3273 | sg_index = 0; | |
3274 | chained = 0; | |
3275 | ||
3276 | for (i = 0; i < seg; i++) { | |
3277 | if (((sg_index+1) == (h->max_cmd_sgentries)) && | |
3278 | !chained && ((seg - i) > 1)) { | |
3279 | /* Point to next chain block. */ | |
3280 | curr_sg = h->cmd_sg_list[c->cmdindex]; | |
3281 | sg_index = 0; | |
3282 | chained = 1; | |
3283 | } | |
3284 | curr_sg[sg_index].Len = tmp_sg[i].length; | |
3285 | temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]), | |
3286 | tmp_sg[i].offset, | |
3287 | tmp_sg[i].length, dir); | |
3288 | curr_sg[sg_index].Addr.lower = temp64.val32.lower; | |
3289 | curr_sg[sg_index].Addr.upper = temp64.val32.upper; | |
3290 | curr_sg[sg_index].Ext = 0; /* we are not chaining */ | |
3291 | ++sg_index; | |
3292 | } | |
3293 | if (chained) | |
3294 | cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex], | |
3295 | (seg - (h->max_cmd_sgentries - 1)) * | |
3296 | sizeof(SGDescriptor_struct)); | |
3297 | ||
3298 | /* track how many SG entries we are using */ | |
3299 | if (seg > h->maxSG) | |
3300 | h->maxSG = seg; | |
3301 | ||
3302 | dev_dbg(&h->pdev->dev, "Submitting %u sectors in %d segments " | |
3303 | "chained[%d]\n", | |
3304 | blk_rq_sectors(creq), seg, chained); | |
3305 | ||
3306 | c->Header.SGTotal = seg + chained; | |
3307 | if (seg <= h->max_cmd_sgentries) | |
3308 | c->Header.SGList = c->Header.SGTotal; | |
3309 | else | |
3310 | c->Header.SGList = h->max_cmd_sgentries; | |
3311 | set_performant_mode(h, c); | |
3312 | ||
3313 | if (likely(creq->cmd_type == REQ_TYPE_FS)) { | |
3314 | if(h->cciss_read == CCISS_READ_10) { | |
3315 | c->Request.CDB[1] = 0; | |
3316 | c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */ | |
3317 | c->Request.CDB[3] = (start_blk >> 16) & 0xff; | |
3318 | c->Request.CDB[4] = (start_blk >> 8) & 0xff; | |
3319 | c->Request.CDB[5] = start_blk & 0xff; | |
3320 | c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */ | |
3321 | c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff; | |
3322 | c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff; | |
3323 | c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0; | |
3324 | } else { | |
3325 | u32 upper32 = upper_32_bits(start_blk); | |
3326 | ||
3327 | c->Request.CDBLen = 16; | |
3328 | c->Request.CDB[1]= 0; | |
3329 | c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */ | |
3330 | c->Request.CDB[3]= (upper32 >> 16) & 0xff; | |
3331 | c->Request.CDB[4]= (upper32 >> 8) & 0xff; | |
3332 | c->Request.CDB[5]= upper32 & 0xff; | |
3333 | c->Request.CDB[6]= (start_blk >> 24) & 0xff; | |
3334 | c->Request.CDB[7]= (start_blk >> 16) & 0xff; | |
3335 | c->Request.CDB[8]= (start_blk >> 8) & 0xff; | |
3336 | c->Request.CDB[9]= start_blk & 0xff; | |
3337 | c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff; | |
3338 | c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff; | |
3339 | c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff; | |
3340 | c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff; | |
3341 | c->Request.CDB[14] = c->Request.CDB[15] = 0; | |
3342 | } | |
3343 | } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) { | |
3344 | c->Request.CDBLen = creq->cmd_len; | |
3345 | memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB); | |
3346 | } else { | |
3347 | dev_warn(&h->pdev->dev, "bad request type %d\n", | |
3348 | creq->cmd_type); | |
3349 | BUG(); | |
3350 | } | |
3351 | ||
3352 | spin_lock_irq(q->queue_lock); | |
3353 | ||
3354 | addQ(&h->reqQ, c); | |
3355 | h->Qdepth++; | |
3356 | if (h->Qdepth > h->maxQsinceinit) | |
3357 | h->maxQsinceinit = h->Qdepth; | |
3358 | ||
3359 | goto queue; | |
3360 | full: | |
3361 | blk_stop_queue(q); | |
3362 | startio: | |
3363 | /* We will already have the driver lock here so not need | |
3364 | * to lock it. | |
3365 | */ | |
3366 | start_io(h); | |
3367 | } | |
3368 | ||
3369 | static inline unsigned long get_next_completion(ctlr_info_t *h) | |
3370 | { | |
3371 | return h->access.command_completed(h); | |
3372 | } | |
3373 | ||
3374 | static inline int interrupt_pending(ctlr_info_t *h) | |
3375 | { | |
3376 | return h->access.intr_pending(h); | |
3377 | } | |
3378 | ||
3379 | static inline long interrupt_not_for_us(ctlr_info_t *h) | |
3380 | { | |
3381 | return ((h->access.intr_pending(h) == 0) || | |
3382 | (h->interrupts_enabled == 0)); | |
3383 | } | |
3384 | ||
3385 | static inline int bad_tag(ctlr_info_t *h, u32 tag_index, | |
3386 | u32 raw_tag) | |
3387 | { | |
3388 | if (unlikely(tag_index >= h->nr_cmds)) { | |
3389 | dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag); | |
3390 | return 1; | |
3391 | } | |
3392 | return 0; | |
3393 | } | |
3394 | ||
3395 | static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c, | |
3396 | u32 raw_tag) | |
3397 | { | |
3398 | removeQ(c); | |
3399 | if (likely(c->cmd_type == CMD_RWREQ)) | |
3400 | complete_command(h, c, 0); | |
3401 | else if (c->cmd_type == CMD_IOCTL_PEND) | |
3402 | complete(c->waiting); | |
3403 | #ifdef CONFIG_CISS_SCSI_TAPE | |
3404 | else if (c->cmd_type == CMD_SCSI) | |
3405 | complete_scsi_command(c, 0, raw_tag); | |
3406 | #endif | |
3407 | } | |
3408 | ||
3409 | static inline u32 next_command(ctlr_info_t *h) | |
3410 | { | |
3411 | u32 a; | |
3412 | ||
3413 | if (unlikely(h->transMethod != CFGTBL_Trans_Performant)) | |
3414 | return h->access.command_completed(h); | |
3415 | ||
3416 | if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { | |
3417 | a = *(h->reply_pool_head); /* Next cmd in ring buffer */ | |
3418 | (h->reply_pool_head)++; | |
3419 | h->commands_outstanding--; | |
3420 | } else { | |
3421 | a = FIFO_EMPTY; | |
3422 | } | |
3423 | /* Check for wraparound */ | |
3424 | if (h->reply_pool_head == (h->reply_pool + h->max_commands)) { | |
3425 | h->reply_pool_head = h->reply_pool; | |
3426 | h->reply_pool_wraparound ^= 1; | |
3427 | } | |
3428 | return a; | |
3429 | } | |
3430 | ||
3431 | /* process completion of an indexed ("direct lookup") command */ | |
3432 | static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag) | |
3433 | { | |
3434 | u32 tag_index; | |
3435 | CommandList_struct *c; | |
3436 | ||
3437 | tag_index = cciss_tag_to_index(raw_tag); | |
3438 | if (bad_tag(h, tag_index, raw_tag)) | |
3439 | return next_command(h); | |
3440 | c = h->cmd_pool + tag_index; | |
3441 | finish_cmd(h, c, raw_tag); | |
3442 | return next_command(h); | |
3443 | } | |
3444 | ||
3445 | /* process completion of a non-indexed command */ | |
3446 | static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag) | |
3447 | { | |
3448 | u32 tag; | |
3449 | CommandList_struct *c = NULL; | |
3450 | struct hlist_node *tmp; | |
3451 | __u32 busaddr_masked, tag_masked; | |
3452 | ||
3453 | tag = cciss_tag_discard_error_bits(raw_tag); | |
3454 | hlist_for_each_entry(c, tmp, &h->cmpQ, list) { | |
3455 | busaddr_masked = cciss_tag_discard_error_bits(c->busaddr); | |
3456 | tag_masked = cciss_tag_discard_error_bits(tag); | |
3457 | if (busaddr_masked == tag_masked) { | |
3458 | finish_cmd(h, c, raw_tag); | |
3459 | return next_command(h); | |
3460 | } | |
3461 | } | |
3462 | bad_tag(h, h->nr_cmds + 1, raw_tag); | |
3463 | return next_command(h); | |
3464 | } | |
3465 | ||
3466 | static irqreturn_t do_cciss_intx(int irq, void *dev_id) | |
3467 | { | |
3468 | ctlr_info_t *h = dev_id; | |
3469 | unsigned long flags; | |
3470 | u32 raw_tag; | |
3471 | ||
3472 | if (interrupt_not_for_us(h)) | |
3473 | return IRQ_NONE; | |
3474 | spin_lock_irqsave(&h->lock, flags); | |
3475 | while (interrupt_pending(h)) { | |
3476 | raw_tag = get_next_completion(h); | |
3477 | while (raw_tag != FIFO_EMPTY) { | |
3478 | if (cciss_tag_contains_index(raw_tag)) | |
3479 | raw_tag = process_indexed_cmd(h, raw_tag); | |
3480 | else | |
3481 | raw_tag = process_nonindexed_cmd(h, raw_tag); | |
3482 | } | |
3483 | } | |
3484 | spin_unlock_irqrestore(&h->lock, flags); | |
3485 | return IRQ_HANDLED; | |
3486 | } | |
3487 | ||
3488 | /* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never | |
3489 | * check the interrupt pending register because it is not set. | |
3490 | */ | |
3491 | static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id) | |
3492 | { | |
3493 | ctlr_info_t *h = dev_id; | |
3494 | unsigned long flags; | |
3495 | u32 raw_tag; | |
3496 | ||
3497 | spin_lock_irqsave(&h->lock, flags); | |
3498 | raw_tag = get_next_completion(h); | |
3499 | while (raw_tag != FIFO_EMPTY) { | |
3500 | if (cciss_tag_contains_index(raw_tag)) | |
3501 | raw_tag = process_indexed_cmd(h, raw_tag); | |
3502 | else | |
3503 | raw_tag = process_nonindexed_cmd(h, raw_tag); | |
3504 | } | |
3505 | spin_unlock_irqrestore(&h->lock, flags); | |
3506 | return IRQ_HANDLED; | |
3507 | } | |
3508 | ||
3509 | /** | |
3510 | * add_to_scan_list() - add controller to rescan queue | |
3511 | * @h: Pointer to the controller. | |
3512 | * | |
3513 | * Adds the controller to the rescan queue if not already on the queue. | |
3514 | * | |
3515 | * returns 1 if added to the queue, 0 if skipped (could be on the | |
3516 | * queue already, or the controller could be initializing or shutting | |
3517 | * down). | |
3518 | **/ | |
3519 | static int add_to_scan_list(struct ctlr_info *h) | |
3520 | { | |
3521 | struct ctlr_info *test_h; | |
3522 | int found = 0; | |
3523 | int ret = 0; | |
3524 | ||
3525 | if (h->busy_initializing) | |
3526 | return 0; | |
3527 | ||
3528 | if (!mutex_trylock(&h->busy_shutting_down)) | |
3529 | return 0; | |
3530 | ||
3531 | mutex_lock(&scan_mutex); | |
3532 | list_for_each_entry(test_h, &scan_q, scan_list) { | |
3533 | if (test_h == h) { | |
3534 | found = 1; | |
3535 | break; | |
3536 | } | |
3537 | } | |
3538 | if (!found && !h->busy_scanning) { | |
3539 | INIT_COMPLETION(h->scan_wait); | |
3540 | list_add_tail(&h->scan_list, &scan_q); | |
3541 | ret = 1; | |
3542 | } | |
3543 | mutex_unlock(&scan_mutex); | |
3544 | mutex_unlock(&h->busy_shutting_down); | |
3545 | ||
3546 | return ret; | |
3547 | } | |
3548 | ||
3549 | /** | |
3550 | * remove_from_scan_list() - remove controller from rescan queue | |
3551 | * @h: Pointer to the controller. | |
3552 | * | |
3553 | * Removes the controller from the rescan queue if present. Blocks if | |
3554 | * the controller is currently conducting a rescan. The controller | |
3555 | * can be in one of three states: | |
3556 | * 1. Doesn't need a scan | |
3557 | * 2. On the scan list, but not scanning yet (we remove it) | |
3558 | * 3. Busy scanning (and not on the list). In this case we want to wait for | |
3559 | * the scan to complete to make sure the scanning thread for this | |
3560 | * controller is completely idle. | |
3561 | **/ | |
3562 | static void remove_from_scan_list(struct ctlr_info *h) | |
3563 | { | |
3564 | struct ctlr_info *test_h, *tmp_h; | |
3565 | ||
3566 | mutex_lock(&scan_mutex); | |
3567 | list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) { | |
3568 | if (test_h == h) { /* state 2. */ | |
3569 | list_del(&h->scan_list); | |
3570 | complete_all(&h->scan_wait); | |
3571 | mutex_unlock(&scan_mutex); | |
3572 | return; | |
3573 | } | |
3574 | } | |
3575 | if (h->busy_scanning) { /* state 3. */ | |
3576 | mutex_unlock(&scan_mutex); | |
3577 | wait_for_completion(&h->scan_wait); | |
3578 | } else { /* state 1, nothing to do. */ | |
3579 | mutex_unlock(&scan_mutex); | |
3580 | } | |
3581 | } | |
3582 | ||
3583 | /** | |
3584 | * scan_thread() - kernel thread used to rescan controllers | |
3585 | * @data: Ignored. | |
3586 | * | |
3587 | * A kernel thread used scan for drive topology changes on | |
3588 | * controllers. The thread processes only one controller at a time | |
3589 | * using a queue. Controllers are added to the queue using | |
3590 | * add_to_scan_list() and removed from the queue either after done | |
3591 | * processing or using remove_from_scan_list(). | |
3592 | * | |
3593 | * returns 0. | |
3594 | **/ | |
3595 | static int scan_thread(void *data) | |
3596 | { | |
3597 | struct ctlr_info *h; | |
3598 | ||
3599 | while (1) { | |
3600 | set_current_state(TASK_INTERRUPTIBLE); | |
3601 | schedule(); | |
3602 | if (kthread_should_stop()) | |
3603 | break; | |
3604 | ||
3605 | while (1) { | |
3606 | mutex_lock(&scan_mutex); | |
3607 | if (list_empty(&scan_q)) { | |
3608 | mutex_unlock(&scan_mutex); | |
3609 | break; | |
3610 | } | |
3611 | ||
3612 | h = list_entry(scan_q.next, | |
3613 | struct ctlr_info, | |
3614 | scan_list); | |
3615 | list_del(&h->scan_list); | |
3616 | h->busy_scanning = 1; | |
3617 | mutex_unlock(&scan_mutex); | |
3618 | ||
3619 | rebuild_lun_table(h, 0, 0); | |
3620 | complete_all(&h->scan_wait); | |
3621 | mutex_lock(&scan_mutex); | |
3622 | h->busy_scanning = 0; | |
3623 | mutex_unlock(&scan_mutex); | |
3624 | } | |
3625 | } | |
3626 | ||
3627 | return 0; | |
3628 | } | |
3629 | ||
3630 | static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c) | |
3631 | { | |
3632 | if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) | |
3633 | return 0; | |
3634 | ||
3635 | switch (c->err_info->SenseInfo[12]) { | |
3636 | case STATE_CHANGED: | |
3637 | dev_warn(&h->pdev->dev, "a state change " | |
3638 | "detected, command retried\n"); | |
3639 | return 1; | |
3640 | break; | |
3641 | case LUN_FAILED: | |
3642 | dev_warn(&h->pdev->dev, "LUN failure " | |
3643 | "detected, action required\n"); | |
3644 | return 1; | |
3645 | break; | |
3646 | case REPORT_LUNS_CHANGED: | |
3647 | dev_warn(&h->pdev->dev, "report LUN data changed\n"); | |
3648 | /* | |
3649 | * Here, we could call add_to_scan_list and wake up the scan thread, | |
3650 | * except that it's quite likely that we will get more than one | |
3651 | * REPORT_LUNS_CHANGED condition in quick succession, which means | |
3652 | * that those which occur after the first one will likely happen | |
3653 | * *during* the scan_thread's rescan. And the rescan code is not | |
3654 | * robust enough to restart in the middle, undoing what it has already | |
3655 | * done, and it's not clear that it's even possible to do this, since | |
3656 | * part of what it does is notify the block layer, which starts | |
3657 | * doing it's own i/o to read partition tables and so on, and the | |
3658 | * driver doesn't have visibility to know what might need undoing. | |
3659 | * In any event, if possible, it is horribly complicated to get right | |
3660 | * so we just don't do it for now. | |
3661 | * | |
3662 | * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012. | |
3663 | */ | |
3664 | return 1; | |
3665 | break; | |
3666 | case POWER_OR_RESET: | |
3667 | dev_warn(&h->pdev->dev, | |
3668 | "a power on or device reset detected\n"); | |
3669 | return 1; | |
3670 | break; | |
3671 | case UNIT_ATTENTION_CLEARED: | |
3672 | dev_warn(&h->pdev->dev, | |
3673 | "unit attention cleared by another initiator\n"); | |
3674 | return 1; | |
3675 | break; | |
3676 | default: | |
3677 | dev_warn(&h->pdev->dev, "unknown unit attention detected\n"); | |
3678 | return 1; | |
3679 | } | |
3680 | } | |
3681 | ||
3682 | /* | |
3683 | * We cannot read the structure directly, for portability we must use | |
3684 | * the io functions. | |
3685 | * This is for debug only. | |
3686 | */ | |
3687 | static void print_cfg_table(ctlr_info_t *h) | |
3688 | { | |
3689 | int i; | |
3690 | char temp_name[17]; | |
3691 | CfgTable_struct *tb = h->cfgtable; | |
3692 | ||
3693 | dev_dbg(&h->pdev->dev, "Controller Configuration information\n"); | |
3694 | dev_dbg(&h->pdev->dev, "------------------------------------\n"); | |
3695 | for (i = 0; i < 4; i++) | |
3696 | temp_name[i] = readb(&(tb->Signature[i])); | |
3697 | temp_name[4] = '\0'; | |
3698 | dev_dbg(&h->pdev->dev, " Signature = %s\n", temp_name); | |
3699 | dev_dbg(&h->pdev->dev, " Spec Number = %d\n", | |
3700 | readl(&(tb->SpecValence))); | |
3701 | dev_dbg(&h->pdev->dev, " Transport methods supported = 0x%x\n", | |
3702 | readl(&(tb->TransportSupport))); | |
3703 | dev_dbg(&h->pdev->dev, " Transport methods active = 0x%x\n", | |
3704 | readl(&(tb->TransportActive))); | |
3705 | dev_dbg(&h->pdev->dev, " Requested transport Method = 0x%x\n", | |
3706 | readl(&(tb->HostWrite.TransportRequest))); | |
3707 | dev_dbg(&h->pdev->dev, " Coalesce Interrupt Delay = 0x%x\n", | |
3708 | readl(&(tb->HostWrite.CoalIntDelay))); | |
3709 | dev_dbg(&h->pdev->dev, " Coalesce Interrupt Count = 0x%x\n", | |
3710 | readl(&(tb->HostWrite.CoalIntCount))); | |
3711 | dev_dbg(&h->pdev->dev, " Max outstanding commands = 0x%d\n", | |
3712 | readl(&(tb->CmdsOutMax))); | |
3713 | dev_dbg(&h->pdev->dev, " Bus Types = 0x%x\n", | |
3714 | readl(&(tb->BusTypes))); | |
3715 | for (i = 0; i < 16; i++) | |
3716 | temp_name[i] = readb(&(tb->ServerName[i])); | |
3717 | temp_name[16] = '\0'; | |
3718 | dev_dbg(&h->pdev->dev, " Server Name = %s\n", temp_name); | |
3719 | dev_dbg(&h->pdev->dev, " Heartbeat Counter = 0x%x\n\n\n", | |
3720 | readl(&(tb->HeartBeat))); | |
3721 | } | |
3722 | ||
3723 | static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) | |
3724 | { | |
3725 | int i, offset, mem_type, bar_type; | |
3726 | if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ | |
3727 | return 0; | |
3728 | offset = 0; | |
3729 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { | |
3730 | bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; | |
3731 | if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) | |
3732 | offset += 4; | |
3733 | else { | |
3734 | mem_type = pci_resource_flags(pdev, i) & | |
3735 | PCI_BASE_ADDRESS_MEM_TYPE_MASK; | |
3736 | switch (mem_type) { | |
3737 | case PCI_BASE_ADDRESS_MEM_TYPE_32: | |
3738 | case PCI_BASE_ADDRESS_MEM_TYPE_1M: | |
3739 | offset += 4; /* 32 bit */ | |
3740 | break; | |
3741 | case PCI_BASE_ADDRESS_MEM_TYPE_64: | |
3742 | offset += 8; | |
3743 | break; | |
3744 | default: /* reserved in PCI 2.2 */ | |
3745 | dev_warn(&pdev->dev, | |
3746 | "Base address is invalid\n"); | |
3747 | return -1; | |
3748 | break; | |
3749 | } | |
3750 | } | |
3751 | if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) | |
3752 | return i + 1; | |
3753 | } | |
3754 | return -1; | |
3755 | } | |
3756 | ||
3757 | /* Fill in bucket_map[], given nsgs (the max number of | |
3758 | * scatter gather elements supported) and bucket[], | |
3759 | * which is an array of 8 integers. The bucket[] array | |
3760 | * contains 8 different DMA transfer sizes (in 16 | |
3761 | * byte increments) which the controller uses to fetch | |
3762 | * commands. This function fills in bucket_map[], which | |
3763 | * maps a given number of scatter gather elements to one of | |
3764 | * the 8 DMA transfer sizes. The point of it is to allow the | |
3765 | * controller to only do as much DMA as needed to fetch the | |
3766 | * command, with the DMA transfer size encoded in the lower | |
3767 | * bits of the command address. | |
3768 | */ | |
3769 | static void calc_bucket_map(int bucket[], int num_buckets, | |
3770 | int nsgs, int *bucket_map) | |
3771 | { | |
3772 | int i, j, b, size; | |
3773 | ||
3774 | /* even a command with 0 SGs requires 4 blocks */ | |
3775 | #define MINIMUM_TRANSFER_BLOCKS 4 | |
3776 | #define NUM_BUCKETS 8 | |
3777 | /* Note, bucket_map must have nsgs+1 entries. */ | |
3778 | for (i = 0; i <= nsgs; i++) { | |
3779 | /* Compute size of a command with i SG entries */ | |
3780 | size = i + MINIMUM_TRANSFER_BLOCKS; | |
3781 | b = num_buckets; /* Assume the biggest bucket */ | |
3782 | /* Find the bucket that is just big enough */ | |
3783 | for (j = 0; j < 8; j++) { | |
3784 | if (bucket[j] >= size) { | |
3785 | b = j; | |
3786 | break; | |
3787 | } | |
3788 | } | |
3789 | /* for a command with i SG entries, use bucket b. */ | |
3790 | bucket_map[i] = b; | |
3791 | } | |
3792 | } | |
3793 | ||
3794 | static void __devinit cciss_wait_for_mode_change_ack(ctlr_info_t *h) | |
3795 | { | |
3796 | int i; | |
3797 | ||
3798 | /* under certain very rare conditions, this can take awhile. | |
3799 | * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right | |
3800 | * as we enter this code.) */ | |
3801 | for (i = 0; i < MAX_CONFIG_WAIT; i++) { | |
3802 | if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) | |
3803 | break; | |
3804 | msleep(10); | |
3805 | } | |
3806 | } | |
3807 | ||
3808 | static __devinit void cciss_enter_performant_mode(ctlr_info_t *h) | |
3809 | { | |
3810 | /* This is a bit complicated. There are 8 registers on | |
3811 | * the controller which we write to to tell it 8 different | |
3812 | * sizes of commands which there may be. It's a way of | |
3813 | * reducing the DMA done to fetch each command. Encoded into | |
3814 | * each command's tag are 3 bits which communicate to the controller | |
3815 | * which of the eight sizes that command fits within. The size of | |
3816 | * each command depends on how many scatter gather entries there are. | |
3817 | * Each SG entry requires 16 bytes. The eight registers are programmed | |
3818 | * with the number of 16-byte blocks a command of that size requires. | |
3819 | * The smallest command possible requires 5 such 16 byte blocks. | |
3820 | * the largest command possible requires MAXSGENTRIES + 4 16-byte | |
3821 | * blocks. Note, this only extends to the SG entries contained | |
3822 | * within the command block, and does not extend to chained blocks | |
3823 | * of SG elements. bft[] contains the eight values we write to | |
3824 | * the registers. They are not evenly distributed, but have more | |
3825 | * sizes for small commands, and fewer sizes for larger commands. | |
3826 | */ | |
3827 | __u32 trans_offset; | |
3828 | int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4}; | |
3829 | /* | |
3830 | * 5 = 1 s/g entry or 4k | |
3831 | * 6 = 2 s/g entry or 8k | |
3832 | * 8 = 4 s/g entry or 16k | |
3833 | * 10 = 6 s/g entry or 24k | |
3834 | */ | |
3835 | unsigned long register_value; | |
3836 | BUILD_BUG_ON(28 > MAXSGENTRIES + 4); | |
3837 | ||
3838 | h->reply_pool_wraparound = 1; /* spec: init to 1 */ | |
3839 | ||
3840 | /* Controller spec: zero out this buffer. */ | |
3841 | memset(h->reply_pool, 0, h->max_commands * sizeof(__u64)); | |
3842 | h->reply_pool_head = h->reply_pool; | |
3843 | ||
3844 | trans_offset = readl(&(h->cfgtable->TransMethodOffset)); | |
3845 | calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries, | |
3846 | h->blockFetchTable); | |
3847 | writel(bft[0], &h->transtable->BlockFetch0); | |
3848 | writel(bft[1], &h->transtable->BlockFetch1); | |
3849 | writel(bft[2], &h->transtable->BlockFetch2); | |
3850 | writel(bft[3], &h->transtable->BlockFetch3); | |
3851 | writel(bft[4], &h->transtable->BlockFetch4); | |
3852 | writel(bft[5], &h->transtable->BlockFetch5); | |
3853 | writel(bft[6], &h->transtable->BlockFetch6); | |
3854 | writel(bft[7], &h->transtable->BlockFetch7); | |
3855 | ||
3856 | /* size of controller ring buffer */ | |
3857 | writel(h->max_commands, &h->transtable->RepQSize); | |
3858 | writel(1, &h->transtable->RepQCount); | |
3859 | writel(0, &h->transtable->RepQCtrAddrLow32); | |
3860 | writel(0, &h->transtable->RepQCtrAddrHigh32); | |
3861 | writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32); | |
3862 | writel(0, &h->transtable->RepQAddr0High32); | |
3863 | writel(CFGTBL_Trans_Performant, | |
3864 | &(h->cfgtable->HostWrite.TransportRequest)); | |
3865 | ||
3866 | writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); | |
3867 | cciss_wait_for_mode_change_ack(h); | |
3868 | register_value = readl(&(h->cfgtable->TransportActive)); | |
3869 | if (!(register_value & CFGTBL_Trans_Performant)) | |
3870 | dev_warn(&h->pdev->dev, "cciss: unable to get board into" | |
3871 | " performant mode\n"); | |
3872 | } | |
3873 | ||
3874 | static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h) | |
3875 | { | |
3876 | __u32 trans_support; | |
3877 | ||
3878 | dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n"); | |
3879 | /* Attempt to put controller into performant mode if supported */ | |
3880 | /* Does board support performant mode? */ | |
3881 | trans_support = readl(&(h->cfgtable->TransportSupport)); | |
3882 | if (!(trans_support & PERFORMANT_MODE)) | |
3883 | return; | |
3884 | ||
3885 | dev_dbg(&h->pdev->dev, "Placing controller into performant mode\n"); | |
3886 | /* Performant mode demands commands on a 32 byte boundary | |
3887 | * pci_alloc_consistent aligns on page boundarys already. | |
3888 | * Just need to check if divisible by 32 | |
3889 | */ | |
3890 | if ((sizeof(CommandList_struct) % 32) != 0) { | |
3891 | dev_warn(&h->pdev->dev, "%s %d %s\n", | |
3892 | "cciss info: command size[", | |
3893 | (int)sizeof(CommandList_struct), | |
3894 | "] not divisible by 32, no performant mode..\n"); | |
3895 | return; | |
3896 | } | |
3897 | ||
3898 | /* Performant mode ring buffer and supporting data structures */ | |
3899 | h->reply_pool = (__u64 *)pci_alloc_consistent( | |
3900 | h->pdev, h->max_commands * sizeof(__u64), | |
3901 | &(h->reply_pool_dhandle)); | |
3902 | ||
3903 | /* Need a block fetch table for performant mode */ | |
3904 | h->blockFetchTable = kmalloc(((h->maxsgentries+1) * | |
3905 | sizeof(__u32)), GFP_KERNEL); | |
3906 | ||
3907 | if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL)) | |
3908 | goto clean_up; | |
3909 | ||
3910 | cciss_enter_performant_mode(h); | |
3911 | ||
3912 | /* Change the access methods to the performant access methods */ | |
3913 | h->access = SA5_performant_access; | |
3914 | h->transMethod = CFGTBL_Trans_Performant; | |
3915 | ||
3916 | return; | |
3917 | clean_up: | |
3918 | kfree(h->blockFetchTable); | |
3919 | if (h->reply_pool) | |
3920 | pci_free_consistent(h->pdev, | |
3921 | h->max_commands * sizeof(__u64), | |
3922 | h->reply_pool, | |
3923 | h->reply_pool_dhandle); | |
3924 | return; | |
3925 | ||
3926 | } /* cciss_put_controller_into_performant_mode */ | |
3927 | ||
3928 | /* If MSI/MSI-X is supported by the kernel we will try to enable it on | |
3929 | * controllers that are capable. If not, we use IO-APIC mode. | |
3930 | */ | |
3931 | ||
3932 | static void __devinit cciss_interrupt_mode(ctlr_info_t *h) | |
3933 | { | |
3934 | #ifdef CONFIG_PCI_MSI | |
3935 | int err; | |
3936 | struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1}, | |
3937 | {0, 2}, {0, 3} | |
3938 | }; | |
3939 | ||
3940 | /* Some boards advertise MSI but don't really support it */ | |
3941 | if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) || | |
3942 | (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11)) | |
3943 | goto default_int_mode; | |
3944 | ||
3945 | if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) { | |
3946 | err = pci_enable_msix(h->pdev, cciss_msix_entries, 4); | |
3947 | if (!err) { | |
3948 | h->intr[0] = cciss_msix_entries[0].vector; | |
3949 | h->intr[1] = cciss_msix_entries[1].vector; | |
3950 | h->intr[2] = cciss_msix_entries[2].vector; | |
3951 | h->intr[3] = cciss_msix_entries[3].vector; | |
3952 | h->msix_vector = 1; | |
3953 | return; | |
3954 | } | |
3955 | if (err > 0) { | |
3956 | dev_warn(&h->pdev->dev, | |
3957 | "only %d MSI-X vectors available\n", err); | |
3958 | goto default_int_mode; | |
3959 | } else { | |
3960 | dev_warn(&h->pdev->dev, | |
3961 | "MSI-X init failed %d\n", err); | |
3962 | goto default_int_mode; | |
3963 | } | |
3964 | } | |
3965 | if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) { | |
3966 | if (!pci_enable_msi(h->pdev)) | |
3967 | h->msi_vector = 1; | |
3968 | else | |
3969 | dev_warn(&h->pdev->dev, "MSI init failed\n"); | |
3970 | } | |
3971 | default_int_mode: | |
3972 | #endif /* CONFIG_PCI_MSI */ | |
3973 | /* if we get here we're going to use the default interrupt mode */ | |
3974 | h->intr[PERF_MODE_INT] = h->pdev->irq; | |
3975 | return; | |
3976 | } | |
3977 | ||
3978 | static int __devinit cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id) | |
3979 | { | |
3980 | int i; | |
3981 | u32 subsystem_vendor_id, subsystem_device_id; | |
3982 | ||
3983 | subsystem_vendor_id = pdev->subsystem_vendor; | |
3984 | subsystem_device_id = pdev->subsystem_device; | |
3985 | *board_id = ((subsystem_device_id << 16) & 0xffff0000) | | |
3986 | subsystem_vendor_id; | |
3987 | ||
3988 | for (i = 0; i < ARRAY_SIZE(products); i++) { | |
3989 | /* Stand aside for hpsa driver on request */ | |
3990 | if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY) | |
3991 | return -ENODEV; | |
3992 | if (*board_id == products[i].board_id) | |
3993 | return i; | |
3994 | } | |
3995 | dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n", | |
3996 | *board_id); | |
3997 | return -ENODEV; | |
3998 | } | |
3999 | ||
4000 | static inline bool cciss_board_disabled(ctlr_info_t *h) | |
4001 | { | |
4002 | u16 command; | |
4003 | ||
4004 | (void) pci_read_config_word(h->pdev, PCI_COMMAND, &command); | |
4005 | return ((command & PCI_COMMAND_MEMORY) == 0); | |
4006 | } | |
4007 | ||
4008 | static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev, | |
4009 | unsigned long *memory_bar) | |
4010 | { | |
4011 | int i; | |
4012 | ||
4013 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) | |
4014 | if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) { | |
4015 | /* addressing mode bits already removed */ | |
4016 | *memory_bar = pci_resource_start(pdev, i); | |
4017 | dev_dbg(&pdev->dev, "memory BAR = %lx\n", | |
4018 | *memory_bar); | |
4019 | return 0; | |
4020 | } | |
4021 | dev_warn(&pdev->dev, "no memory BAR found\n"); | |
4022 | return -ENODEV; | |
4023 | } | |
4024 | ||
4025 | static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h) | |
4026 | { | |
4027 | int i; | |
4028 | u32 scratchpad; | |
4029 | ||
4030 | for (i = 0; i < CCISS_BOARD_READY_ITERATIONS; i++) { | |
4031 | scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET); | |
4032 | if (scratchpad == CCISS_FIRMWARE_READY) | |
4033 | return 0; | |
4034 | msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS); | |
4035 | } | |
4036 | dev_warn(&h->pdev->dev, "board not ready, timed out.\n"); | |
4037 | return -ENODEV; | |
4038 | } | |
4039 | ||
4040 | static int __devinit cciss_find_cfg_addrs(struct pci_dev *pdev, | |
4041 | void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index, | |
4042 | u64 *cfg_offset) | |
4043 | { | |
4044 | *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET); | |
4045 | *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET); | |
4046 | *cfg_base_addr &= (u32) 0x0000ffff; | |
4047 | *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr); | |
4048 | if (*cfg_base_addr_index == -1) { | |
4049 | dev_warn(&pdev->dev, "cannot find cfg_base_addr_index, " | |
4050 | "*cfg_base_addr = 0x%08x\n", *cfg_base_addr); | |
4051 | return -ENODEV; | |
4052 | } | |
4053 | return 0; | |
4054 | } | |
4055 | ||
4056 | static int __devinit cciss_find_cfgtables(ctlr_info_t *h) | |
4057 | { | |
4058 | u64 cfg_offset; | |
4059 | u32 cfg_base_addr; | |
4060 | u64 cfg_base_addr_index; | |
4061 | u32 trans_offset; | |
4062 | int rc; | |
4063 | ||
4064 | rc = cciss_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr, | |
4065 | &cfg_base_addr_index, &cfg_offset); | |
4066 | if (rc) | |
4067 | return rc; | |
4068 | h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev, | |
4069 | cfg_base_addr_index) + cfg_offset, sizeof(h->cfgtable)); | |
4070 | if (!h->cfgtable) | |
4071 | return -ENOMEM; | |
4072 | /* Find performant mode table. */ | |
4073 | trans_offset = readl(&h->cfgtable->TransMethodOffset); | |
4074 | h->transtable = remap_pci_mem(pci_resource_start(h->pdev, | |
4075 | cfg_base_addr_index)+cfg_offset+trans_offset, | |
4076 | sizeof(*h->transtable)); | |
4077 | if (!h->transtable) | |
4078 | return -ENOMEM; | |
4079 | return 0; | |
4080 | } | |
4081 | ||
4082 | static void __devinit cciss_get_max_perf_mode_cmds(struct ctlr_info *h) | |
4083 | { | |
4084 | h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands)); | |
4085 | if (h->max_commands < 16) { | |
4086 | dev_warn(&h->pdev->dev, "Controller reports " | |
4087 | "max supported commands of %d, an obvious lie. " | |
4088 | "Using 16. Ensure that firmware is up to date.\n", | |
4089 | h->max_commands); | |
4090 | h->max_commands = 16; | |
4091 | } | |
4092 | } | |
4093 | ||
4094 | /* Interrogate the hardware for some limits: | |
4095 | * max commands, max SG elements without chaining, and with chaining, | |
4096 | * SG chain block size, etc. | |
4097 | */ | |
4098 | static void __devinit cciss_find_board_params(ctlr_info_t *h) | |
4099 | { | |
4100 | cciss_get_max_perf_mode_cmds(h); | |
4101 | h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */ | |
4102 | h->maxsgentries = readl(&(h->cfgtable->MaxSGElements)); | |
4103 | /* | |
4104 | * Limit in-command s/g elements to 32 save dma'able memory. | |
4105 | * Howvever spec says if 0, use 31 | |
4106 | */ | |
4107 | h->max_cmd_sgentries = 31; | |
4108 | if (h->maxsgentries > 512) { | |
4109 | h->max_cmd_sgentries = 32; | |
4110 | h->chainsize = h->maxsgentries - h->max_cmd_sgentries + 1; | |
4111 | h->maxsgentries--; /* save one for chain pointer */ | |
4112 | } else { | |
4113 | h->maxsgentries = 31; /* default to traditional values */ | |
4114 | h->chainsize = 0; | |
4115 | } | |
4116 | } | |
4117 | ||
4118 | static inline bool CISS_signature_present(ctlr_info_t *h) | |
4119 | { | |
4120 | if ((readb(&h->cfgtable->Signature[0]) != 'C') || | |
4121 | (readb(&h->cfgtable->Signature[1]) != 'I') || | |
4122 | (readb(&h->cfgtable->Signature[2]) != 'S') || | |
4123 | (readb(&h->cfgtable->Signature[3]) != 'S')) { | |
4124 | dev_warn(&h->pdev->dev, "not a valid CISS config table\n"); | |
4125 | return false; | |
4126 | } | |
4127 | return true; | |
4128 | } | |
4129 | ||
4130 | /* Need to enable prefetch in the SCSI core for 6400 in x86 */ | |
4131 | static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h) | |
4132 | { | |
4133 | #ifdef CONFIG_X86 | |
4134 | u32 prefetch; | |
4135 | ||
4136 | prefetch = readl(&(h->cfgtable->SCSI_Prefetch)); | |
4137 | prefetch |= 0x100; | |
4138 | writel(prefetch, &(h->cfgtable->SCSI_Prefetch)); | |
4139 | #endif | |
4140 | } | |
4141 | ||
4142 | /* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result | |
4143 | * in a prefetch beyond physical memory. | |
4144 | */ | |
4145 | static inline void cciss_p600_dma_prefetch_quirk(ctlr_info_t *h) | |
4146 | { | |
4147 | u32 dma_prefetch; | |
4148 | __u32 dma_refetch; | |
4149 | ||
4150 | if (h->board_id != 0x3225103C) | |
4151 | return; | |
4152 | dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG); | |
4153 | dma_prefetch |= 0x8000; | |
4154 | writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG); | |
4155 | pci_read_config_dword(h->pdev, PCI_COMMAND_PARITY, &dma_refetch); | |
4156 | dma_refetch |= 0x1; | |
4157 | pci_write_config_dword(h->pdev, PCI_COMMAND_PARITY, dma_refetch); | |
4158 | } | |
4159 | ||
4160 | static int __devinit cciss_pci_init(ctlr_info_t *h) | |
4161 | { | |
4162 | int prod_index, err; | |
4163 | ||
4164 | prod_index = cciss_lookup_board_id(h->pdev, &h->board_id); | |
4165 | if (prod_index < 0) | |
4166 | return -ENODEV; | |
4167 | h->product_name = products[prod_index].product_name; | |
4168 | h->access = *(products[prod_index].access); | |
4169 | ||
4170 | if (cciss_board_disabled(h)) { | |
4171 | dev_warn(&h->pdev->dev, "controller appears to be disabled\n"); | |
4172 | return -ENODEV; | |
4173 | } | |
4174 | err = pci_enable_device(h->pdev); | |
4175 | if (err) { | |
4176 | dev_warn(&h->pdev->dev, "Unable to Enable PCI device\n"); | |
4177 | return err; | |
4178 | } | |
4179 | ||
4180 | err = pci_request_regions(h->pdev, "cciss"); | |
4181 | if (err) { | |
4182 | dev_warn(&h->pdev->dev, | |
4183 | "Cannot obtain PCI resources, aborting\n"); | |
4184 | return err; | |
4185 | } | |
4186 | ||
4187 | dev_dbg(&h->pdev->dev, "irq = %x\n", h->pdev->irq); | |
4188 | dev_dbg(&h->pdev->dev, "board_id = %x\n", h->board_id); | |
4189 | ||
4190 | /* If the kernel supports MSI/MSI-X we will try to enable that functionality, | |
4191 | * else we use the IO-APIC interrupt assigned to us by system ROM. | |
4192 | */ | |
4193 | cciss_interrupt_mode(h); | |
4194 | err = cciss_pci_find_memory_BAR(h->pdev, &h->paddr); | |
4195 | if (err) | |
4196 | goto err_out_free_res; | |
4197 | h->vaddr = remap_pci_mem(h->paddr, 0x250); | |
4198 | if (!h->vaddr) { | |
4199 | err = -ENOMEM; | |
4200 | goto err_out_free_res; | |
4201 | } | |
4202 | err = cciss_wait_for_board_ready(h); | |
4203 | if (err) | |
4204 | goto err_out_free_res; | |
4205 | err = cciss_find_cfgtables(h); | |
4206 | if (err) | |
4207 | goto err_out_free_res; | |
4208 | print_cfg_table(h); | |
4209 | cciss_find_board_params(h); | |
4210 | ||
4211 | if (!CISS_signature_present(h)) { | |
4212 | err = -ENODEV; | |
4213 | goto err_out_free_res; | |
4214 | } | |
4215 | cciss_enable_scsi_prefetch(h); | |
4216 | cciss_p600_dma_prefetch_quirk(h); | |
4217 | cciss_put_controller_into_performant_mode(h); | |
4218 | return 0; | |
4219 | ||
4220 | err_out_free_res: | |
4221 | /* | |
4222 | * Deliberately omit pci_disable_device(): it does something nasty to | |
4223 | * Smart Array controllers that pci_enable_device does not undo | |
4224 | */ | |
4225 | if (h->transtable) | |
4226 | iounmap(h->transtable); | |
4227 | if (h->cfgtable) | |
4228 | iounmap(h->cfgtable); | |
4229 | if (h->vaddr) | |
4230 | iounmap(h->vaddr); | |
4231 | pci_release_regions(h->pdev); | |
4232 | return err; | |
4233 | } | |
4234 | ||
4235 | /* Function to find the first free pointer into our hba[] array | |
4236 | * Returns -1 if no free entries are left. | |
4237 | */ | |
4238 | static int alloc_cciss_hba(struct pci_dev *pdev) | |
4239 | { | |
4240 | int i; | |
4241 | ||
4242 | for (i = 0; i < MAX_CTLR; i++) { | |
4243 | if (!hba[i]) { | |
4244 | ctlr_info_t *h; | |
4245 | ||
4246 | h = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); | |
4247 | if (!h) | |
4248 | goto Enomem; | |
4249 | hba[i] = h; | |
4250 | return i; | |
4251 | } | |
4252 | } | |
4253 | dev_warn(&pdev->dev, "This driver supports a maximum" | |
4254 | " of %d controllers.\n", MAX_CTLR); | |
4255 | return -1; | |
4256 | Enomem: | |
4257 | dev_warn(&pdev->dev, "out of memory.\n"); | |
4258 | return -1; | |
4259 | } | |
4260 | ||
4261 | static void free_hba(ctlr_info_t *h) | |
4262 | { | |
4263 | int i; | |
4264 | ||
4265 | hba[h->ctlr] = NULL; | |
4266 | for (i = 0; i < h->highest_lun + 1; i++) | |
4267 | if (h->gendisk[i] != NULL) | |
4268 | put_disk(h->gendisk[i]); | |
4269 | kfree(h); | |
4270 | } | |
4271 | ||
4272 | /* Send a message CDB to the firmware. */ | |
4273 | static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) | |
4274 | { | |
4275 | typedef struct { | |
4276 | CommandListHeader_struct CommandHeader; | |
4277 | RequestBlock_struct Request; | |
4278 | ErrDescriptor_struct ErrorDescriptor; | |
4279 | } Command; | |
4280 | static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); | |
4281 | Command *cmd; | |
4282 | dma_addr_t paddr64; | |
4283 | uint32_t paddr32, tag; | |
4284 | void __iomem *vaddr; | |
4285 | int i, err; | |
4286 | ||
4287 | vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); | |
4288 | if (vaddr == NULL) | |
4289 | return -ENOMEM; | |
4290 | ||
4291 | /* The Inbound Post Queue only accepts 32-bit physical addresses for the | |
4292 | CCISS commands, so they must be allocated from the lower 4GiB of | |
4293 | memory. */ | |
4294 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); | |
4295 | if (err) { | |
4296 | iounmap(vaddr); | |
4297 | return -ENOMEM; | |
4298 | } | |
4299 | ||
4300 | cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); | |
4301 | if (cmd == NULL) { | |
4302 | iounmap(vaddr); | |
4303 | return -ENOMEM; | |
4304 | } | |
4305 | ||
4306 | /* This must fit, because of the 32-bit consistent DMA mask. Also, | |
4307 | although there's no guarantee, we assume that the address is at | |
4308 | least 4-byte aligned (most likely, it's page-aligned). */ | |
4309 | paddr32 = paddr64; | |
4310 | ||
4311 | cmd->CommandHeader.ReplyQueue = 0; | |
4312 | cmd->CommandHeader.SGList = 0; | |
4313 | cmd->CommandHeader.SGTotal = 0; | |
4314 | cmd->CommandHeader.Tag.lower = paddr32; | |
4315 | cmd->CommandHeader.Tag.upper = 0; | |
4316 | memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); | |
4317 | ||
4318 | cmd->Request.CDBLen = 16; | |
4319 | cmd->Request.Type.Type = TYPE_MSG; | |
4320 | cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; | |
4321 | cmd->Request.Type.Direction = XFER_NONE; | |
4322 | cmd->Request.Timeout = 0; /* Don't time out */ | |
4323 | cmd->Request.CDB[0] = opcode; | |
4324 | cmd->Request.CDB[1] = type; | |
4325 | memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ | |
4326 | ||
4327 | cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); | |
4328 | cmd->ErrorDescriptor.Addr.upper = 0; | |
4329 | cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); | |
4330 | ||
4331 | writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); | |
4332 | ||
4333 | for (i = 0; i < 10; i++) { | |
4334 | tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); | |
4335 | if ((tag & ~3) == paddr32) | |
4336 | break; | |
4337 | schedule_timeout_uninterruptible(HZ); | |
4338 | } | |
4339 | ||
4340 | iounmap(vaddr); | |
4341 | ||
4342 | /* we leak the DMA buffer here ... no choice since the controller could | |
4343 | still complete the command. */ | |
4344 | if (i == 10) { | |
4345 | dev_err(&pdev->dev, | |
4346 | "controller message %02x:%02x timed out\n", | |
4347 | opcode, type); | |
4348 | return -ETIMEDOUT; | |
4349 | } | |
4350 | ||
4351 | pci_free_consistent(pdev, cmd_sz, cmd, paddr64); | |
4352 | ||
4353 | if (tag & 2) { | |
4354 | dev_err(&pdev->dev, "controller message %02x:%02x failed\n", | |
4355 | opcode, type); | |
4356 | return -EIO; | |
4357 | } | |
4358 | ||
4359 | dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n", | |
4360 | opcode, type); | |
4361 | return 0; | |
4362 | } | |
4363 | ||
4364 | #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0) | |
4365 | #define cciss_noop(p) cciss_message(p, 3, 0) | |
4366 | ||
4367 | static __devinit int cciss_reset_msi(struct pci_dev *pdev) | |
4368 | { | |
4369 | /* the #defines are stolen from drivers/pci/msi.h. */ | |
4370 | #define msi_control_reg(base) (base + PCI_MSI_FLAGS) | |
4371 | #define PCI_MSIX_FLAGS_ENABLE (1 << 15) | |
4372 | ||
4373 | int pos; | |
4374 | u16 control = 0; | |
4375 | ||
4376 | pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); | |
4377 | if (pos) { | |
4378 | pci_read_config_word(pdev, msi_control_reg(pos), &control); | |
4379 | if (control & PCI_MSI_FLAGS_ENABLE) { | |
4380 | dev_info(&pdev->dev, "resetting MSI\n"); | |
4381 | pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE); | |
4382 | } | |
4383 | } | |
4384 | ||
4385 | pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); | |
4386 | if (pos) { | |
4387 | pci_read_config_word(pdev, msi_control_reg(pos), &control); | |
4388 | if (control & PCI_MSIX_FLAGS_ENABLE) { | |
4389 | dev_info(&pdev->dev, "resetting MSI-X\n"); | |
4390 | pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE); | |
4391 | } | |
4392 | } | |
4393 | ||
4394 | return 0; | |
4395 | } | |
4396 | ||
4397 | static int cciss_controller_hard_reset(struct pci_dev *pdev, | |
4398 | void * __iomem vaddr, bool use_doorbell) | |
4399 | { | |
4400 | u16 pmcsr; | |
4401 | int pos; | |
4402 | ||
4403 | if (use_doorbell) { | |
4404 | /* For everything after the P600, the PCI power state method | |
4405 | * of resetting the controller doesn't work, so we have this | |
4406 | * other way using the doorbell register. | |
4407 | */ | |
4408 | dev_info(&pdev->dev, "using doorbell to reset controller\n"); | |
4409 | writel(DOORBELL_CTLR_RESET, vaddr + SA5_DOORBELL); | |
4410 | msleep(1000); | |
4411 | } else { /* Try to do it the PCI power state way */ | |
4412 | ||
4413 | /* Quoting from the Open CISS Specification: "The Power | |
4414 | * Management Control/Status Register (CSR) controls the power | |
4415 | * state of the device. The normal operating state is D0, | |
4416 | * CSR=00h. The software off state is D3, CSR=03h. To reset | |
4417 | * the controller, place the interface device in D3 then to D0, | |
4418 | * this causes a secondary PCI reset which will reset the | |
4419 | * controller." */ | |
4420 | ||
4421 | pos = pci_find_capability(pdev, PCI_CAP_ID_PM); | |
4422 | if (pos == 0) { | |
4423 | dev_err(&pdev->dev, | |
4424 | "cciss_controller_hard_reset: " | |
4425 | "PCI PM not supported\n"); | |
4426 | return -ENODEV; | |
4427 | } | |
4428 | dev_info(&pdev->dev, "using PCI PM to reset controller\n"); | |
4429 | /* enter the D3hot power management state */ | |
4430 | pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); | |
4431 | pmcsr &= ~PCI_PM_CTRL_STATE_MASK; | |
4432 | pmcsr |= PCI_D3hot; | |
4433 | pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); | |
4434 | ||
4435 | msleep(500); | |
4436 | ||
4437 | /* enter the D0 power management state */ | |
4438 | pmcsr &= ~PCI_PM_CTRL_STATE_MASK; | |
4439 | pmcsr |= PCI_D0; | |
4440 | pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); | |
4441 | ||
4442 | msleep(500); | |
4443 | } | |
4444 | return 0; | |
4445 | } | |
4446 | ||
4447 | /* This does a hard reset of the controller using PCI power management | |
4448 | * states or using the doorbell register. */ | |
4449 | static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev) | |
4450 | { | |
4451 | u16 saved_config_space[32]; | |
4452 | u64 cfg_offset; | |
4453 | u32 cfg_base_addr; | |
4454 | u64 cfg_base_addr_index; | |
4455 | void __iomem *vaddr; | |
4456 | unsigned long paddr; | |
4457 | u32 misc_fw_support, active_transport; | |
4458 | int rc, i; | |
4459 | CfgTable_struct __iomem *cfgtable; | |
4460 | bool use_doorbell; | |
4461 | u32 board_id; | |
4462 | ||
4463 | /* For controllers as old a the p600, this is very nearly | |
4464 | * the same thing as | |
4465 | * | |
4466 | * pci_save_state(pci_dev); | |
4467 | * pci_set_power_state(pci_dev, PCI_D3hot); | |
4468 | * pci_set_power_state(pci_dev, PCI_D0); | |
4469 | * pci_restore_state(pci_dev); | |
4470 | * | |
4471 | * but we can't use these nice canned kernel routines on | |
4472 | * kexec, because they also check the MSI/MSI-X state in PCI | |
4473 | * configuration space and do the wrong thing when it is | |
4474 | * set/cleared. Also, the pci_save/restore_state functions | |
4475 | * violate the ordering requirements for restoring the | |
4476 | * configuration space from the CCISS document (see the | |
4477 | * comment below). So we roll our own .... | |
4478 | * | |
4479 | * For controllers newer than the P600, the pci power state | |
4480 | * method of resetting doesn't work so we have another way | |
4481 | * using the doorbell register. | |
4482 | */ | |
4483 | ||
4484 | /* Exclude 640x boards. These are two pci devices in one slot | |
4485 | * which share a battery backed cache module. One controls the | |
4486 | * cache, the other accesses the cache through the one that controls | |
4487 | * it. If we reset the one controlling the cache, the other will | |
4488 | * likely not be happy. Just forbid resetting this conjoined mess. | |
4489 | */ | |
4490 | cciss_lookup_board_id(pdev, &board_id); | |
4491 | if (board_id == 0x409C0E11 || board_id == 0x409D0E11) { | |
4492 | dev_warn(&pdev->dev, "Cannot reset Smart Array 640x " | |
4493 | "due to shared cache module."); | |
4494 | return -ENODEV; | |
4495 | } | |
4496 | ||
4497 | for (i = 0; i < 32; i++) | |
4498 | pci_read_config_word(pdev, 2*i, &saved_config_space[i]); | |
4499 | ||
4500 | /* find the first memory BAR, so we can find the cfg table */ | |
4501 | rc = cciss_pci_find_memory_BAR(pdev, &paddr); | |
4502 | if (rc) | |
4503 | return rc; | |
4504 | vaddr = remap_pci_mem(paddr, 0x250); | |
4505 | if (!vaddr) | |
4506 | return -ENOMEM; | |
4507 | ||
4508 | /* find cfgtable in order to check if reset via doorbell is supported */ | |
4509 | rc = cciss_find_cfg_addrs(pdev, vaddr, &cfg_base_addr, | |
4510 | &cfg_base_addr_index, &cfg_offset); | |
4511 | if (rc) | |
4512 | goto unmap_vaddr; | |
4513 | cfgtable = remap_pci_mem(pci_resource_start(pdev, | |
4514 | cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable)); | |
4515 | if (!cfgtable) { | |
4516 | rc = -ENOMEM; | |
4517 | goto unmap_vaddr; | |
4518 | } | |
4519 | ||
4520 | /* If reset via doorbell register is supported, use that. */ | |
4521 | misc_fw_support = readl(&cfgtable->misc_fw_support); | |
4522 | use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET; | |
4523 | ||
4524 | rc = cciss_controller_hard_reset(pdev, vaddr, use_doorbell); | |
4525 | if (rc) | |
4526 | goto unmap_cfgtable; | |
4527 | ||
4528 | /* Restore the PCI configuration space. The Open CISS | |
4529 | * Specification says, "Restore the PCI Configuration | |
4530 | * Registers, offsets 00h through 60h. It is important to | |
4531 | * restore the command register, 16-bits at offset 04h, | |
4532 | * last. Do not restore the configuration status register, | |
4533 | * 16-bits at offset 06h." Note that the offset is 2*i. | |
4534 | */ | |
4535 | for (i = 0; i < 32; i++) { | |
4536 | if (i == 2 || i == 3) | |
4537 | continue; | |
4538 | pci_write_config_word(pdev, 2*i, saved_config_space[i]); | |
4539 | } | |
4540 | wmb(); | |
4541 | pci_write_config_word(pdev, 4, saved_config_space[2]); | |
4542 | ||
4543 | /* Some devices (notably the HP Smart Array 5i Controller) | |
4544 | need a little pause here */ | |
4545 | msleep(CCISS_POST_RESET_PAUSE_MSECS); | |
4546 | ||
4547 | /* Controller should be in simple mode at this point. If it's not, | |
4548 | * It means we're on one of those controllers which doesn't support | |
4549 | * the doorbell reset method and on which the PCI power management reset | |
4550 | * method doesn't work (P800, for example.) | |
4551 | * In those cases, don't try to proceed, as it generally doesn't work. | |
4552 | */ | |
4553 | active_transport = readl(&cfgtable->TransportActive); | |
4554 | if (active_transport & PERFORMANT_MODE) { | |
4555 | dev_warn(&pdev->dev, "Unable to successfully reset controller," | |
4556 | " Ignoring controller.\n"); | |
4557 | rc = -ENODEV; | |
4558 | } | |
4559 | ||
4560 | unmap_cfgtable: | |
4561 | iounmap(cfgtable); | |
4562 | ||
4563 | unmap_vaddr: | |
4564 | iounmap(vaddr); | |
4565 | return rc; | |
4566 | } | |
4567 | ||
4568 | static __devinit int cciss_init_reset_devices(struct pci_dev *pdev) | |
4569 | { | |
4570 | int rc, i; | |
4571 | ||
4572 | if (!reset_devices) | |
4573 | return 0; | |
4574 | ||
4575 | /* Reset the controller with a PCI power-cycle or via doorbell */ | |
4576 | rc = cciss_kdump_hard_reset_controller(pdev); | |
4577 | ||
4578 | /* -ENOTSUPP here means we cannot reset the controller | |
4579 | * but it's already (and still) up and running in | |
4580 | * "performant mode". Or, it might be 640x, which can't reset | |
4581 | * due to concerns about shared bbwc between 6402/6404 pair. | |
4582 | */ | |
4583 | if (rc == -ENOTSUPP) | |
4584 | return 0; /* just try to do the kdump anyhow. */ | |
4585 | if (rc) | |
4586 | return -ENODEV; | |
4587 | if (cciss_reset_msi(pdev)) | |
4588 | return -ENODEV; | |
4589 | ||
4590 | /* Now try to get the controller to respond to a no-op */ | |
4591 | for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) { | |
4592 | if (cciss_noop(pdev) == 0) | |
4593 | break; | |
4594 | else | |
4595 | dev_warn(&pdev->dev, "no-op failed%s\n", | |
4596 | (i < CCISS_POST_RESET_NOOP_RETRIES - 1 ? | |
4597 | "; re-trying" : "")); | |
4598 | msleep(CCISS_POST_RESET_NOOP_INTERVAL_MSECS); | |
4599 | } | |
4600 | return 0; | |
4601 | } | |
4602 | ||
4603 | /* | |
4604 | * This is it. Find all the controllers and register them. I really hate | |
4605 | * stealing all these major device numbers. | |
4606 | * returns the number of block devices registered. | |
4607 | */ | |
4608 | static int __devinit cciss_init_one(struct pci_dev *pdev, | |
4609 | const struct pci_device_id *ent) | |
4610 | { | |
4611 | int i; | |
4612 | int j = 0; | |
4613 | int k = 0; | |
4614 | int rc; | |
4615 | int dac, return_code; | |
4616 | InquiryData_struct *inq_buff; | |
4617 | ctlr_info_t *h; | |
4618 | ||
4619 | rc = cciss_init_reset_devices(pdev); | |
4620 | if (rc) | |
4621 | return rc; | |
4622 | i = alloc_cciss_hba(pdev); | |
4623 | if (i < 0) | |
4624 | return -1; | |
4625 | ||
4626 | h = hba[i]; | |
4627 | h->pdev = pdev; | |
4628 | h->busy_initializing = 1; | |
4629 | INIT_HLIST_HEAD(&h->cmpQ); | |
4630 | INIT_HLIST_HEAD(&h->reqQ); | |
4631 | mutex_init(&h->busy_shutting_down); | |
4632 | ||
4633 | if (cciss_pci_init(h) != 0) | |
4634 | goto clean_no_release_regions; | |
4635 | ||
4636 | sprintf(h->devname, "cciss%d", i); | |
4637 | h->ctlr = i; | |
4638 | ||
4639 | init_completion(&h->scan_wait); | |
4640 | ||
4641 | if (cciss_create_hba_sysfs_entry(h)) | |
4642 | goto clean0; | |
4643 | ||
4644 | /* configure PCI DMA stuff */ | |
4645 | if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) | |
4646 | dac = 1; | |
4647 | else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) | |
4648 | dac = 0; | |
4649 | else { | |
4650 | dev_err(&h->pdev->dev, "no suitable DMA available\n"); | |
4651 | goto clean1; | |
4652 | } | |
4653 | ||
4654 | /* | |
4655 | * register with the major number, or get a dynamic major number | |
4656 | * by passing 0 as argument. This is done for greater than | |
4657 | * 8 controller support. | |
4658 | */ | |
4659 | if (i < MAX_CTLR_ORIG) | |
4660 | h->major = COMPAQ_CISS_MAJOR + i; | |
4661 | rc = register_blkdev(h->major, h->devname); | |
4662 | if (rc == -EBUSY || rc == -EINVAL) { | |
4663 | dev_err(&h->pdev->dev, | |
4664 | "Unable to get major number %d for %s " | |
4665 | "on hba %d\n", h->major, h->devname, i); | |
4666 | goto clean1; | |
4667 | } else { | |
4668 | if (i >= MAX_CTLR_ORIG) | |
4669 | h->major = rc; | |
4670 | } | |
4671 | ||
4672 | /* make sure the board interrupts are off */ | |
4673 | h->access.set_intr_mask(h, CCISS_INTR_OFF); | |
4674 | if (h->msi_vector || h->msix_vector) { | |
4675 | if (request_irq(h->intr[PERF_MODE_INT], | |
4676 | do_cciss_msix_intr, | |
4677 | IRQF_DISABLED, h->devname, h)) { | |
4678 | dev_err(&h->pdev->dev, "Unable to get irq %d for %s\n", | |
4679 | h->intr[PERF_MODE_INT], h->devname); | |
4680 | goto clean2; | |
4681 | } | |
4682 | } else { | |
4683 | if (request_irq(h->intr[PERF_MODE_INT], do_cciss_intx, | |
4684 | IRQF_DISABLED, h->devname, h)) { | |
4685 | dev_err(&h->pdev->dev, "Unable to get irq %d for %s\n", | |
4686 | h->intr[PERF_MODE_INT], h->devname); | |
4687 | goto clean2; | |
4688 | } | |
4689 | } | |
4690 | ||
4691 | dev_info(&h->pdev->dev, "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n", | |
4692 | h->devname, pdev->device, pci_name(pdev), | |
4693 | h->intr[PERF_MODE_INT], dac ? "" : " not"); | |
4694 | ||
4695 | h->cmd_pool_bits = | |
4696 | kmalloc(DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) | |
4697 | * sizeof(unsigned long), GFP_KERNEL); | |
4698 | h->cmd_pool = (CommandList_struct *) | |
4699 | pci_alloc_consistent(h->pdev, | |
4700 | h->nr_cmds * sizeof(CommandList_struct), | |
4701 | &(h->cmd_pool_dhandle)); | |
4702 | h->errinfo_pool = (ErrorInfo_struct *) | |
4703 | pci_alloc_consistent(h->pdev, | |
4704 | h->nr_cmds * sizeof(ErrorInfo_struct), | |
4705 | &(h->errinfo_pool_dhandle)); | |
4706 | if ((h->cmd_pool_bits == NULL) | |
4707 | || (h->cmd_pool == NULL) | |
4708 | || (h->errinfo_pool == NULL)) { | |
4709 | dev_err(&h->pdev->dev, "out of memory"); | |
4710 | goto clean4; | |
4711 | } | |
4712 | ||
4713 | /* Need space for temp scatter list */ | |
4714 | h->scatter_list = kmalloc(h->max_commands * | |
4715 | sizeof(struct scatterlist *), | |
4716 | GFP_KERNEL); | |
4717 | for (k = 0; k < h->nr_cmds; k++) { | |
4718 | h->scatter_list[k] = kmalloc(sizeof(struct scatterlist) * | |
4719 | h->maxsgentries, | |
4720 | GFP_KERNEL); | |
4721 | if (h->scatter_list[k] == NULL) { | |
4722 | dev_err(&h->pdev->dev, | |
4723 | "could not allocate s/g lists\n"); | |
4724 | goto clean4; | |
4725 | } | |
4726 | } | |
4727 | h->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, | |
4728 | h->chainsize, h->nr_cmds); | |
4729 | if (!h->cmd_sg_list && h->chainsize > 0) | |
4730 | goto clean4; | |
4731 | ||
4732 | spin_lock_init(&h->lock); | |
4733 | ||
4734 | /* Initialize the pdev driver private data. | |
4735 | have it point to h. */ | |
4736 | pci_set_drvdata(pdev, h); | |
4737 | /* command and error info recs zeroed out before | |
4738 | they are used */ | |
4739 | memset(h->cmd_pool_bits, 0, | |
4740 | DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) | |
4741 | * sizeof(unsigned long)); | |
4742 | ||
4743 | h->num_luns = 0; | |
4744 | h->highest_lun = -1; | |
4745 | for (j = 0; j < CISS_MAX_LUN; j++) { | |
4746 | h->drv[j] = NULL; | |
4747 | h->gendisk[j] = NULL; | |
4748 | } | |
4749 | ||
4750 | cciss_scsi_setup(h); | |
4751 | ||
4752 | /* Turn the interrupts on so we can service requests */ | |
4753 | h->access.set_intr_mask(h, CCISS_INTR_ON); | |
4754 | ||
4755 | /* Get the firmware version */ | |
4756 | inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); | |
4757 | if (inq_buff == NULL) { | |
4758 | dev_err(&h->pdev->dev, "out of memory\n"); | |
4759 | goto clean4; | |
4760 | } | |
4761 | ||
4762 | return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff, | |
4763 | sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD); | |
4764 | if (return_code == IO_OK) { | |
4765 | h->firm_ver[0] = inq_buff->data_byte[32]; | |
4766 | h->firm_ver[1] = inq_buff->data_byte[33]; | |
4767 | h->firm_ver[2] = inq_buff->data_byte[34]; | |
4768 | h->firm_ver[3] = inq_buff->data_byte[35]; | |
4769 | } else { /* send command failed */ | |
4770 | dev_warn(&h->pdev->dev, "unable to determine firmware" | |
4771 | " version of controller\n"); | |
4772 | } | |
4773 | kfree(inq_buff); | |
4774 | ||
4775 | cciss_procinit(h); | |
4776 | ||
4777 | h->cciss_max_sectors = 8192; | |
4778 | ||
4779 | rebuild_lun_table(h, 1, 0); | |
4780 | h->busy_initializing = 0; | |
4781 | return 1; | |
4782 | ||
4783 | clean4: | |
4784 | kfree(h->cmd_pool_bits); | |
4785 | /* Free up sg elements */ | |
4786 | for (k = 0; k < h->nr_cmds; k++) | |
4787 | kfree(h->scatter_list[k]); | |
4788 | kfree(h->scatter_list); | |
4789 | cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds); | |
4790 | if (h->cmd_pool) | |
4791 | pci_free_consistent(h->pdev, | |
4792 | h->nr_cmds * sizeof(CommandList_struct), | |
4793 | h->cmd_pool, h->cmd_pool_dhandle); | |
4794 | if (h->errinfo_pool) | |
4795 | pci_free_consistent(h->pdev, | |
4796 | h->nr_cmds * sizeof(ErrorInfo_struct), | |
4797 | h->errinfo_pool, | |
4798 | h->errinfo_pool_dhandle); | |
4799 | free_irq(h->intr[PERF_MODE_INT], h); | |
4800 | clean2: | |
4801 | unregister_blkdev(h->major, h->devname); | |
4802 | clean1: | |
4803 | cciss_destroy_hba_sysfs_entry(h); | |
4804 | clean0: | |
4805 | pci_release_regions(pdev); | |
4806 | clean_no_release_regions: | |
4807 | h->busy_initializing = 0; | |
4808 | ||
4809 | /* | |
4810 | * Deliberately omit pci_disable_device(): it does something nasty to | |
4811 | * Smart Array controllers that pci_enable_device does not undo | |
4812 | */ | |
4813 | pci_set_drvdata(pdev, NULL); | |
4814 | free_hba(h); | |
4815 | return -1; | |
4816 | } | |
4817 | ||
4818 | static void cciss_shutdown(struct pci_dev *pdev) | |
4819 | { | |
4820 | ctlr_info_t *h; | |
4821 | char *flush_buf; | |
4822 | int return_code; | |
4823 | ||
4824 | h = pci_get_drvdata(pdev); | |
4825 | flush_buf = kzalloc(4, GFP_KERNEL); | |
4826 | if (!flush_buf) { | |
4827 | dev_warn(&h->pdev->dev, "cache not flushed, out of memory.\n"); | |
4828 | return; | |
4829 | } | |
4830 | /* write all data in the battery backed cache to disk */ | |
4831 | memset(flush_buf, 0, 4); | |
4832 | return_code = sendcmd_withirq(h, CCISS_CACHE_FLUSH, flush_buf, | |
4833 | 4, 0, CTLR_LUNID, TYPE_CMD); | |
4834 | kfree(flush_buf); | |
4835 | if (return_code != IO_OK) | |
4836 | dev_warn(&h->pdev->dev, "Error flushing cache\n"); | |
4837 | h->access.set_intr_mask(h, CCISS_INTR_OFF); | |
4838 | free_irq(h->intr[PERF_MODE_INT], h); | |
4839 | } | |
4840 | ||
4841 | static void __devexit cciss_remove_one(struct pci_dev *pdev) | |
4842 | { | |
4843 | ctlr_info_t *h; | |
4844 | int i, j; | |
4845 | ||
4846 | if (pci_get_drvdata(pdev) == NULL) { | |
4847 | dev_err(&pdev->dev, "Unable to remove device\n"); | |
4848 | return; | |
4849 | } | |
4850 | ||
4851 | h = pci_get_drvdata(pdev); | |
4852 | i = h->ctlr; | |
4853 | if (hba[i] == NULL) { | |
4854 | dev_err(&pdev->dev, "device appears to already be removed\n"); | |
4855 | return; | |
4856 | } | |
4857 | ||
4858 | mutex_lock(&h->busy_shutting_down); | |
4859 | ||
4860 | remove_from_scan_list(h); | |
4861 | remove_proc_entry(h->devname, proc_cciss); | |
4862 | unregister_blkdev(h->major, h->devname); | |
4863 | ||
4864 | /* remove it from the disk list */ | |
4865 | for (j = 0; j < CISS_MAX_LUN; j++) { | |
4866 | struct gendisk *disk = h->gendisk[j]; | |
4867 | if (disk) { | |
4868 | struct request_queue *q = disk->queue; | |
4869 | ||
4870 | if (disk->flags & GENHD_FL_UP) { | |
4871 | cciss_destroy_ld_sysfs_entry(h, j, 1); | |
4872 | del_gendisk(disk); | |
4873 | } | |
4874 | if (q) | |
4875 | blk_cleanup_queue(q); | |
4876 | } | |
4877 | } | |
4878 | ||
4879 | #ifdef CONFIG_CISS_SCSI_TAPE | |
4880 | cciss_unregister_scsi(h); /* unhook from SCSI subsystem */ | |
4881 | #endif | |
4882 | ||
4883 | cciss_shutdown(pdev); | |
4884 | ||
4885 | #ifdef CONFIG_PCI_MSI | |
4886 | if (h->msix_vector) | |
4887 | pci_disable_msix(h->pdev); | |
4888 | else if (h->msi_vector) | |
4889 | pci_disable_msi(h->pdev); | |
4890 | #endif /* CONFIG_PCI_MSI */ | |
4891 | ||
4892 | iounmap(h->transtable); | |
4893 | iounmap(h->cfgtable); | |
4894 | iounmap(h->vaddr); | |
4895 | ||
4896 | pci_free_consistent(h->pdev, h->nr_cmds * sizeof(CommandList_struct), | |
4897 | h->cmd_pool, h->cmd_pool_dhandle); | |
4898 | pci_free_consistent(h->pdev, h->nr_cmds * sizeof(ErrorInfo_struct), | |
4899 | h->errinfo_pool, h->errinfo_pool_dhandle); | |
4900 | kfree(h->cmd_pool_bits); | |
4901 | /* Free up sg elements */ | |
4902 | for (j = 0; j < h->nr_cmds; j++) | |
4903 | kfree(h->scatter_list[j]); | |
4904 | kfree(h->scatter_list); | |
4905 | cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds); | |
4906 | /* | |
4907 | * Deliberately omit pci_disable_device(): it does something nasty to | |
4908 | * Smart Array controllers that pci_enable_device does not undo | |
4909 | */ | |
4910 | pci_release_regions(pdev); | |
4911 | pci_set_drvdata(pdev, NULL); | |
4912 | cciss_destroy_hba_sysfs_entry(h); | |
4913 | mutex_unlock(&h->busy_shutting_down); | |
4914 | free_hba(h); | |
4915 | } | |
4916 | ||
4917 | static struct pci_driver cciss_pci_driver = { | |
4918 | .name = "cciss", | |
4919 | .probe = cciss_init_one, | |
4920 | .remove = __devexit_p(cciss_remove_one), | |
4921 | .id_table = cciss_pci_device_id, /* id_table */ | |
4922 | .shutdown = cciss_shutdown, | |
4923 | }; | |
4924 | ||
4925 | /* | |
4926 | * This is it. Register the PCI driver information for the cards we control | |
4927 | * the OS will call our registered routines when it finds one of our cards. | |
4928 | */ | |
4929 | static int __init cciss_init(void) | |
4930 | { | |
4931 | int err; | |
4932 | ||
4933 | /* | |
4934 | * The hardware requires that commands are aligned on a 64-bit | |
4935 | * boundary. Given that we use pci_alloc_consistent() to allocate an | |
4936 | * array of them, the size must be a multiple of 8 bytes. | |
4937 | */ | |
4938 | BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT); | |
4939 | printk(KERN_INFO DRIVER_NAME "\n"); | |
4940 | ||
4941 | err = bus_register(&cciss_bus_type); | |
4942 | if (err) | |
4943 | return err; | |
4944 | ||
4945 | /* Start the scan thread */ | |
4946 | cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan"); | |
4947 | if (IS_ERR(cciss_scan_thread)) { | |
4948 | err = PTR_ERR(cciss_scan_thread); | |
4949 | goto err_bus_unregister; | |
4950 | } | |
4951 | ||
4952 | /* Register for our PCI devices */ | |
4953 | err = pci_register_driver(&cciss_pci_driver); | |
4954 | if (err) | |
4955 | goto err_thread_stop; | |
4956 | ||
4957 | return err; | |
4958 | ||
4959 | err_thread_stop: | |
4960 | kthread_stop(cciss_scan_thread); | |
4961 | err_bus_unregister: | |
4962 | bus_unregister(&cciss_bus_type); | |
4963 | ||
4964 | return err; | |
4965 | } | |
4966 | ||
4967 | static void __exit cciss_cleanup(void) | |
4968 | { | |
4969 | int i; | |
4970 | ||
4971 | pci_unregister_driver(&cciss_pci_driver); | |
4972 | /* double check that all controller entrys have been removed */ | |
4973 | for (i = 0; i < MAX_CTLR; i++) { | |
4974 | if (hba[i] != NULL) { | |
4975 | dev_warn(&hba[i]->pdev->dev, | |
4976 | "had to remove controller\n"); | |
4977 | cciss_remove_one(hba[i]->pdev); | |
4978 | } | |
4979 | } | |
4980 | kthread_stop(cciss_scan_thread); | |
4981 | remove_proc_entry("driver/cciss", NULL); | |
4982 | bus_unregister(&cciss_bus_type); | |
4983 | } | |
4984 | ||
4985 | module_init(cciss_init); | |
4986 | module_exit(cciss_cleanup); |