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e67f86b3 AB |
1 | /* Copyright 2012 STEC, Inc. |
2 | * | |
3 | * This file is licensed under the terms of the 3-clause | |
4 | * BSD License (http://opensource.org/licenses/BSD-3-Clause) | |
5 | * or the GNU GPL-2.0 (http://www.gnu.org/licenses/gpl-2.0.html), | |
6 | * at your option. Both licenses are also available in the LICENSE file | |
7 | * distributed with this project. This file may not be copied, modified, | |
8 | * or distributed except in accordance with those terms. | |
9 | * Gordoni Waidhofer <gwaidhofer@stec-inc.com> | |
10 | * Initial Driver Design! | |
11 | * Thomas Swann <tswann@stec-inc.com> | |
12 | * Interrupt handling. | |
13 | * Ramprasad Chinthekindi <rchinthekindi@stec-inc.com> | |
14 | * biomode implementation. | |
15 | * Akhil Bhansali <abhansali@stec-inc.com> | |
16 | * Added support for DISCARD / FLUSH and FUA. | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/pci.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/spinlock.h> | |
25 | #include <linux/blkdev.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/compiler.h> | |
29 | #include <linux/workqueue.h> | |
30 | #include <linux/bitops.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/time.h> | |
33 | #include <linux/hdreg.h> | |
34 | #include <linux/dma-mapping.h> | |
35 | #include <linux/completion.h> | |
36 | #include <linux/scatterlist.h> | |
37 | #include <linux/version.h> | |
38 | #include <linux/err.h> | |
39 | #include <linux/scatterlist.h> | |
40 | #include <linux/aer.h> | |
41 | #include <linux/ctype.h> | |
42 | #include <linux/wait.h> | |
43 | #include <linux/uio.h> | |
44 | #include <scsi/scsi.h> | |
e67f86b3 AB |
45 | #include <scsi/sg.h> |
46 | #include <linux/io.h> | |
47 | #include <linux/uaccess.h> | |
4ca90b53 | 48 | #include <asm/unaligned.h> |
e67f86b3 AB |
49 | |
50 | #include "skd_s1120.h" | |
51 | ||
52 | static int skd_dbg_level; | |
53 | static int skd_isr_comp_limit = 4; | |
54 | ||
55 | enum { | |
56 | STEC_LINK_2_5GTS = 0, | |
57 | STEC_LINK_5GTS = 1, | |
58 | STEC_LINK_8GTS = 2, | |
59 | STEC_LINK_UNKNOWN = 0xFF | |
60 | }; | |
61 | ||
62 | enum { | |
63 | SKD_FLUSH_INITIALIZER, | |
64 | SKD_FLUSH_ZERO_SIZE_FIRST, | |
65 | SKD_FLUSH_DATA_SECOND, | |
66 | }; | |
67 | ||
e67f86b3 AB |
68 | #define SKD_ASSERT(expr) \ |
69 | do { \ | |
70 | if (unlikely(!(expr))) { \ | |
71 | pr_err("Assertion failed! %s,%s,%s,line=%d\n", \ | |
72 | # expr, __FILE__, __func__, __LINE__); \ | |
73 | } \ | |
74 | } while (0) | |
75 | ||
e67f86b3 AB |
76 | #define DRV_NAME "skd" |
77 | #define DRV_VERSION "2.2.1" | |
78 | #define DRV_BUILD_ID "0260" | |
79 | #define PFX DRV_NAME ": " | |
80 | #define DRV_BIN_VERSION 0x100 | |
81 | #define DRV_VER_COMPL "2.2.1." DRV_BUILD_ID | |
82 | ||
83 | MODULE_AUTHOR("bug-reports: support@stec-inc.com"); | |
84 | MODULE_LICENSE("Dual BSD/GPL"); | |
85 | ||
38d4a1bb | 86 | MODULE_DESCRIPTION("STEC s1120 PCIe SSD block driver (b" DRV_BUILD_ID ")"); |
e67f86b3 AB |
87 | MODULE_VERSION(DRV_VERSION "-" DRV_BUILD_ID); |
88 | ||
89 | #define PCI_VENDOR_ID_STEC 0x1B39 | |
90 | #define PCI_DEVICE_ID_S1120 0x0001 | |
91 | ||
92 | #define SKD_FUA_NV (1 << 1) | |
93 | #define SKD_MINORS_PER_DEVICE 16 | |
94 | ||
95 | #define SKD_MAX_QUEUE_DEPTH 200u | |
96 | ||
97 | #define SKD_PAUSE_TIMEOUT (5 * 1000) | |
98 | ||
99 | #define SKD_N_FITMSG_BYTES (512u) | |
100 | ||
101 | #define SKD_N_SPECIAL_CONTEXT 32u | |
102 | #define SKD_N_SPECIAL_FITMSG_BYTES (128u) | |
103 | ||
104 | /* SG elements are 32 bytes, so we can make this 4096 and still be under the | |
105 | * 128KB limit. That allows 4096*4K = 16M xfer size | |
106 | */ | |
107 | #define SKD_N_SG_PER_REQ_DEFAULT 256u | |
108 | #define SKD_N_SG_PER_SPECIAL 256u | |
109 | ||
110 | #define SKD_N_COMPLETION_ENTRY 256u | |
111 | #define SKD_N_READ_CAP_BYTES (8u) | |
112 | ||
113 | #define SKD_N_INTERNAL_BYTES (512u) | |
114 | ||
115 | /* 5 bits of uniqifier, 0xF800 */ | |
116 | #define SKD_ID_INCR (0x400) | |
117 | #define SKD_ID_TABLE_MASK (3u << 8u) | |
118 | #define SKD_ID_RW_REQUEST (0u << 8u) | |
119 | #define SKD_ID_INTERNAL (1u << 8u) | |
120 | #define SKD_ID_SPECIAL_REQUEST (2u << 8u) | |
121 | #define SKD_ID_FIT_MSG (3u << 8u) | |
122 | #define SKD_ID_SLOT_MASK 0x00FFu | |
123 | #define SKD_ID_SLOT_AND_TABLE_MASK 0x03FFu | |
124 | ||
125 | #define SKD_N_TIMEOUT_SLOT 4u | |
126 | #define SKD_TIMEOUT_SLOT_MASK 3u | |
127 | ||
128 | #define SKD_N_MAX_SECTORS 2048u | |
129 | ||
130 | #define SKD_MAX_RETRIES 2u | |
131 | ||
132 | #define SKD_TIMER_SECONDS(seconds) (seconds) | |
133 | #define SKD_TIMER_MINUTES(minutes) ((minutes) * (60)) | |
134 | ||
135 | #define INQ_STD_NBYTES 36 | |
136 | #define SKD_DISCARD_CDB_LENGTH 24 | |
137 | ||
138 | enum skd_drvr_state { | |
139 | SKD_DRVR_STATE_LOAD, | |
140 | SKD_DRVR_STATE_IDLE, | |
141 | SKD_DRVR_STATE_BUSY, | |
142 | SKD_DRVR_STATE_STARTING, | |
143 | SKD_DRVR_STATE_ONLINE, | |
144 | SKD_DRVR_STATE_PAUSING, | |
145 | SKD_DRVR_STATE_PAUSED, | |
146 | SKD_DRVR_STATE_DRAINING_TIMEOUT, | |
147 | SKD_DRVR_STATE_RESTARTING, | |
148 | SKD_DRVR_STATE_RESUMING, | |
149 | SKD_DRVR_STATE_STOPPING, | |
150 | SKD_DRVR_STATE_FAULT, | |
151 | SKD_DRVR_STATE_DISAPPEARED, | |
152 | SKD_DRVR_STATE_PROTOCOL_MISMATCH, | |
153 | SKD_DRVR_STATE_BUSY_ERASE, | |
154 | SKD_DRVR_STATE_BUSY_SANITIZE, | |
155 | SKD_DRVR_STATE_BUSY_IMMINENT, | |
156 | SKD_DRVR_STATE_WAIT_BOOT, | |
157 | SKD_DRVR_STATE_SYNCING, | |
158 | }; | |
159 | ||
160 | #define SKD_WAIT_BOOT_TIMO SKD_TIMER_SECONDS(90u) | |
161 | #define SKD_STARTING_TIMO SKD_TIMER_SECONDS(8u) | |
162 | #define SKD_RESTARTING_TIMO SKD_TIMER_MINUTES(4u) | |
163 | #define SKD_DRAINING_TIMO SKD_TIMER_SECONDS(6u) | |
164 | #define SKD_BUSY_TIMO SKD_TIMER_MINUTES(20u) | |
165 | #define SKD_STARTED_BUSY_TIMO SKD_TIMER_SECONDS(60u) | |
166 | #define SKD_START_WAIT_SECONDS 90u | |
167 | ||
168 | enum skd_req_state { | |
169 | SKD_REQ_STATE_IDLE, | |
170 | SKD_REQ_STATE_SETUP, | |
171 | SKD_REQ_STATE_BUSY, | |
172 | SKD_REQ_STATE_COMPLETED, | |
173 | SKD_REQ_STATE_TIMEOUT, | |
174 | SKD_REQ_STATE_ABORTED, | |
175 | }; | |
176 | ||
177 | enum skd_fit_msg_state { | |
178 | SKD_MSG_STATE_IDLE, | |
179 | SKD_MSG_STATE_BUSY, | |
180 | }; | |
181 | ||
182 | enum skd_check_status_action { | |
183 | SKD_CHECK_STATUS_REPORT_GOOD, | |
184 | SKD_CHECK_STATUS_REPORT_SMART_ALERT, | |
185 | SKD_CHECK_STATUS_REQUEUE_REQUEST, | |
186 | SKD_CHECK_STATUS_REPORT_ERROR, | |
187 | SKD_CHECK_STATUS_BUSY_IMMINENT, | |
188 | }; | |
189 | ||
190 | struct skd_fitmsg_context { | |
191 | enum skd_fit_msg_state state; | |
192 | ||
193 | struct skd_fitmsg_context *next; | |
194 | ||
195 | u32 id; | |
196 | u16 outstanding; | |
197 | ||
198 | u32 length; | |
199 | u32 offset; | |
200 | ||
201 | u8 *msg_buf; | |
202 | dma_addr_t mb_dma_address; | |
203 | }; | |
204 | ||
205 | struct skd_request_context { | |
206 | enum skd_req_state state; | |
207 | ||
208 | struct skd_request_context *next; | |
209 | ||
210 | u16 id; | |
211 | u32 fitmsg_id; | |
212 | ||
213 | struct request *req; | |
e67f86b3 AB |
214 | u8 flush_cmd; |
215 | u8 discard_page; | |
216 | ||
217 | u32 timeout_stamp; | |
218 | u8 sg_data_dir; | |
219 | struct scatterlist *sg; | |
220 | u32 n_sg; | |
221 | u32 sg_byte_count; | |
222 | ||
223 | struct fit_sg_descriptor *sksg_list; | |
224 | dma_addr_t sksg_dma_address; | |
225 | ||
226 | struct fit_completion_entry_v1 completion; | |
227 | ||
228 | struct fit_comp_error_info err_info; | |
229 | ||
230 | }; | |
231 | #define SKD_DATA_DIR_HOST_TO_CARD 1 | |
232 | #define SKD_DATA_DIR_CARD_TO_HOST 2 | |
233 | #define SKD_DATA_DIR_NONE 3 /* especially for DISCARD requests. */ | |
234 | ||
235 | struct skd_special_context { | |
236 | struct skd_request_context req; | |
237 | ||
238 | u8 orphaned; | |
239 | ||
240 | void *data_buf; | |
241 | dma_addr_t db_dma_address; | |
242 | ||
243 | u8 *msg_buf; | |
244 | dma_addr_t mb_dma_address; | |
245 | }; | |
246 | ||
247 | struct skd_sg_io { | |
248 | fmode_t mode; | |
249 | void __user *argp; | |
250 | ||
251 | struct sg_io_hdr sg; | |
252 | ||
253 | u8 cdb[16]; | |
254 | ||
255 | u32 dxfer_len; | |
256 | u32 iovcnt; | |
257 | struct sg_iovec *iov; | |
258 | struct sg_iovec no_iov_iov; | |
259 | ||
260 | struct skd_special_context *skspcl; | |
261 | }; | |
262 | ||
263 | typedef enum skd_irq_type { | |
264 | SKD_IRQ_LEGACY, | |
265 | SKD_IRQ_MSI, | |
266 | SKD_IRQ_MSIX | |
267 | } skd_irq_type_t; | |
268 | ||
269 | #define SKD_MAX_BARS 2 | |
270 | ||
271 | struct skd_device { | |
272 | volatile void __iomem *mem_map[SKD_MAX_BARS]; | |
273 | resource_size_t mem_phys[SKD_MAX_BARS]; | |
274 | u32 mem_size[SKD_MAX_BARS]; | |
275 | ||
276 | skd_irq_type_t irq_type; | |
277 | u32 msix_count; | |
278 | struct skd_msix_entry *msix_entries; | |
279 | ||
280 | struct pci_dev *pdev; | |
281 | int pcie_error_reporting_is_enabled; | |
282 | ||
283 | spinlock_t lock; | |
284 | struct gendisk *disk; | |
285 | struct request_queue *queue; | |
286 | struct device *class_dev; | |
287 | int gendisk_on; | |
288 | int sync_done; | |
289 | ||
290 | atomic_t device_count; | |
291 | u32 devno; | |
292 | u32 major; | |
293 | char name[32]; | |
294 | char isr_name[30]; | |
295 | ||
296 | enum skd_drvr_state state; | |
297 | u32 drive_state; | |
298 | ||
299 | u32 in_flight; | |
300 | u32 cur_max_queue_depth; | |
301 | u32 queue_low_water_mark; | |
302 | u32 dev_max_queue_depth; | |
303 | ||
304 | u32 num_fitmsg_context; | |
305 | u32 num_req_context; | |
306 | ||
307 | u32 timeout_slot[SKD_N_TIMEOUT_SLOT]; | |
308 | u32 timeout_stamp; | |
309 | struct skd_fitmsg_context *skmsg_free_list; | |
310 | struct skd_fitmsg_context *skmsg_table; | |
311 | ||
312 | struct skd_request_context *skreq_free_list; | |
313 | struct skd_request_context *skreq_table; | |
314 | ||
315 | struct skd_special_context *skspcl_free_list; | |
316 | struct skd_special_context *skspcl_table; | |
317 | ||
318 | struct skd_special_context internal_skspcl; | |
319 | u32 read_cap_blocksize; | |
320 | u32 read_cap_last_lba; | |
321 | int read_cap_is_valid; | |
322 | int inquiry_is_valid; | |
323 | u8 inq_serial_num[13]; /*12 chars plus null term */ | |
324 | u8 id_str[80]; /* holds a composite name (pci + sernum) */ | |
325 | ||
326 | u8 skcomp_cycle; | |
327 | u32 skcomp_ix; | |
328 | struct fit_completion_entry_v1 *skcomp_table; | |
329 | struct fit_comp_error_info *skerr_table; | |
330 | dma_addr_t cq_dma_address; | |
331 | ||
332 | wait_queue_head_t waitq; | |
333 | ||
334 | struct timer_list timer; | |
335 | u32 timer_countdown; | |
336 | u32 timer_substate; | |
337 | ||
338 | int n_special; | |
339 | int sgs_per_request; | |
340 | u32 last_mtd; | |
341 | ||
342 | u32 proto_ver; | |
343 | ||
344 | int dbg_level; | |
345 | u32 connect_time_stamp; | |
346 | int connect_retries; | |
347 | #define SKD_MAX_CONNECT_RETRIES 16 | |
348 | u32 drive_jiffies; | |
349 | ||
350 | u32 timo_slot; | |
351 | ||
e67f86b3 | 352 | |
38d4a1bb | 353 | struct work_struct completion_worker; |
e67f86b3 AB |
354 | }; |
355 | ||
356 | #define SKD_WRITEL(DEV, VAL, OFF) skd_reg_write32(DEV, VAL, OFF) | |
357 | #define SKD_READL(DEV, OFF) skd_reg_read32(DEV, OFF) | |
358 | #define SKD_WRITEQ(DEV, VAL, OFF) skd_reg_write64(DEV, VAL, OFF) | |
359 | ||
360 | static inline u32 skd_reg_read32(struct skd_device *skdev, u32 offset) | |
361 | { | |
362 | u32 val; | |
363 | ||
364 | if (likely(skdev->dbg_level < 2)) | |
365 | return readl(skdev->mem_map[1] + offset); | |
366 | else { | |
367 | barrier(); | |
368 | val = readl(skdev->mem_map[1] + offset); | |
369 | barrier(); | |
2e44b427 | 370 | pr_debug("%s:%s:%d offset %x = %x\n", |
371 | skdev->name, __func__, __LINE__, offset, val); | |
e67f86b3 AB |
372 | return val; |
373 | } | |
374 | ||
375 | } | |
376 | ||
377 | static inline void skd_reg_write32(struct skd_device *skdev, u32 val, | |
378 | u32 offset) | |
379 | { | |
380 | if (likely(skdev->dbg_level < 2)) { | |
381 | writel(val, skdev->mem_map[1] + offset); | |
382 | barrier(); | |
e67f86b3 AB |
383 | } else { |
384 | barrier(); | |
385 | writel(val, skdev->mem_map[1] + offset); | |
386 | barrier(); | |
2e44b427 | 387 | pr_debug("%s:%s:%d offset %x = %x\n", |
388 | skdev->name, __func__, __LINE__, offset, val); | |
e67f86b3 AB |
389 | } |
390 | } | |
391 | ||
392 | static inline void skd_reg_write64(struct skd_device *skdev, u64 val, | |
393 | u32 offset) | |
394 | { | |
395 | if (likely(skdev->dbg_level < 2)) { | |
396 | writeq(val, skdev->mem_map[1] + offset); | |
397 | barrier(); | |
e67f86b3 AB |
398 | } else { |
399 | barrier(); | |
400 | writeq(val, skdev->mem_map[1] + offset); | |
401 | barrier(); | |
2e44b427 | 402 | pr_debug("%s:%s:%d offset %x = %016llx\n", |
403 | skdev->name, __func__, __LINE__, offset, val); | |
e67f86b3 AB |
404 | } |
405 | } | |
406 | ||
407 | ||
408 | #define SKD_IRQ_DEFAULT SKD_IRQ_MSI | |
409 | static int skd_isr_type = SKD_IRQ_DEFAULT; | |
410 | ||
411 | module_param(skd_isr_type, int, 0444); | |
412 | MODULE_PARM_DESC(skd_isr_type, "Interrupt type capability." | |
413 | " (0==legacy, 1==MSI, 2==MSI-X, default==1)"); | |
414 | ||
415 | #define SKD_MAX_REQ_PER_MSG_DEFAULT 1 | |
416 | static int skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; | |
417 | ||
418 | module_param(skd_max_req_per_msg, int, 0444); | |
419 | MODULE_PARM_DESC(skd_max_req_per_msg, | |
420 | "Maximum SCSI requests packed in a single message." | |
421 | " (1-14, default==1)"); | |
422 | ||
423 | #define SKD_MAX_QUEUE_DEPTH_DEFAULT 64 | |
424 | #define SKD_MAX_QUEUE_DEPTH_DEFAULT_STR "64" | |
425 | static int skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; | |
426 | ||
427 | module_param(skd_max_queue_depth, int, 0444); | |
428 | MODULE_PARM_DESC(skd_max_queue_depth, | |
429 | "Maximum SCSI requests issued to s1120." | |
430 | " (1-200, default==" SKD_MAX_QUEUE_DEPTH_DEFAULT_STR ")"); | |
431 | ||
432 | static int skd_sgs_per_request = SKD_N_SG_PER_REQ_DEFAULT; | |
433 | module_param(skd_sgs_per_request, int, 0444); | |
434 | MODULE_PARM_DESC(skd_sgs_per_request, | |
435 | "Maximum SG elements per block request." | |
436 | " (1-4096, default==256)"); | |
437 | ||
438 | static int skd_max_pass_thru = SKD_N_SPECIAL_CONTEXT; | |
439 | module_param(skd_max_pass_thru, int, 0444); | |
440 | MODULE_PARM_DESC(skd_max_pass_thru, | |
441 | "Maximum SCSI pass-thru at a time." " (1-50, default==32)"); | |
442 | ||
443 | module_param(skd_dbg_level, int, 0444); | |
444 | MODULE_PARM_DESC(skd_dbg_level, "s1120 debug level (0,1,2)"); | |
445 | ||
446 | module_param(skd_isr_comp_limit, int, 0444); | |
447 | MODULE_PARM_DESC(skd_isr_comp_limit, "s1120 isr comp limit (0=none) default=4"); | |
448 | ||
e67f86b3 AB |
449 | /* Major device number dynamically assigned. */ |
450 | static u32 skd_major; | |
451 | ||
452 | static struct skd_device *skd_construct(struct pci_dev *pdev); | |
453 | static void skd_destruct(struct skd_device *skdev); | |
454 | static const struct block_device_operations skd_blockdev_ops; | |
455 | static void skd_send_fitmsg(struct skd_device *skdev, | |
456 | struct skd_fitmsg_context *skmsg); | |
457 | static void skd_send_special_fitmsg(struct skd_device *skdev, | |
458 | struct skd_special_context *skspcl); | |
459 | static void skd_request_fn(struct request_queue *rq); | |
460 | static void skd_end_request(struct skd_device *skdev, | |
461 | struct skd_request_context *skreq, int error); | |
462 | static int skd_preop_sg_list(struct skd_device *skdev, | |
463 | struct skd_request_context *skreq); | |
464 | static void skd_postop_sg_list(struct skd_device *skdev, | |
465 | struct skd_request_context *skreq); | |
466 | ||
467 | static void skd_restart_device(struct skd_device *skdev); | |
468 | static int skd_quiesce_dev(struct skd_device *skdev); | |
469 | static int skd_unquiesce_dev(struct skd_device *skdev); | |
470 | static void skd_release_special(struct skd_device *skdev, | |
471 | struct skd_special_context *skspcl); | |
472 | static void skd_disable_interrupts(struct skd_device *skdev); | |
473 | static void skd_isr_fwstate(struct skd_device *skdev); | |
474 | static void skd_recover_requests(struct skd_device *skdev, int requeue); | |
475 | static void skd_soft_reset(struct skd_device *skdev); | |
476 | ||
477 | static const char *skd_name(struct skd_device *skdev); | |
478 | const char *skd_drive_state_to_str(int state); | |
479 | const char *skd_skdev_state_to_str(enum skd_drvr_state state); | |
480 | static void skd_log_skdev(struct skd_device *skdev, const char *event); | |
481 | static void skd_log_skmsg(struct skd_device *skdev, | |
482 | struct skd_fitmsg_context *skmsg, const char *event); | |
483 | static void skd_log_skreq(struct skd_device *skdev, | |
484 | struct skd_request_context *skreq, const char *event); | |
485 | ||
e67f86b3 AB |
486 | /* |
487 | ***************************************************************************** | |
488 | * READ/WRITE REQUESTS | |
489 | ***************************************************************************** | |
490 | */ | |
fcd37eb3 | 491 | static void skd_fail_all_pending(struct skd_device *skdev) |
e67f86b3 AB |
492 | { |
493 | struct request_queue *q = skdev->queue; | |
494 | struct request *req; | |
495 | ||
496 | for (;; ) { | |
497 | req = blk_peek_request(q); | |
498 | if (req == NULL) | |
499 | break; | |
500 | blk_start_request(req); | |
501 | __blk_end_request_all(req, -EIO); | |
502 | } | |
503 | } | |
504 | ||
e67f86b3 AB |
505 | static void |
506 | skd_prep_rw_cdb(struct skd_scsi_request *scsi_req, | |
507 | int data_dir, unsigned lba, | |
508 | unsigned count) | |
509 | { | |
510 | if (data_dir == READ) | |
511 | scsi_req->cdb[0] = 0x28; | |
512 | else | |
513 | scsi_req->cdb[0] = 0x2a; | |
514 | ||
515 | scsi_req->cdb[1] = 0; | |
516 | scsi_req->cdb[2] = (lba & 0xff000000) >> 24; | |
517 | scsi_req->cdb[3] = (lba & 0xff0000) >> 16; | |
518 | scsi_req->cdb[4] = (lba & 0xff00) >> 8; | |
519 | scsi_req->cdb[5] = (lba & 0xff); | |
520 | scsi_req->cdb[6] = 0; | |
521 | scsi_req->cdb[7] = (count & 0xff00) >> 8; | |
522 | scsi_req->cdb[8] = count & 0xff; | |
523 | scsi_req->cdb[9] = 0; | |
524 | } | |
525 | ||
526 | static void | |
527 | skd_prep_zerosize_flush_cdb(struct skd_scsi_request *scsi_req, | |
38d4a1bb | 528 | struct skd_request_context *skreq) |
e67f86b3 AB |
529 | { |
530 | skreq->flush_cmd = 1; | |
531 | ||
532 | scsi_req->cdb[0] = 0x35; | |
533 | scsi_req->cdb[1] = 0; | |
534 | scsi_req->cdb[2] = 0; | |
535 | scsi_req->cdb[3] = 0; | |
536 | scsi_req->cdb[4] = 0; | |
537 | scsi_req->cdb[5] = 0; | |
538 | scsi_req->cdb[6] = 0; | |
539 | scsi_req->cdb[7] = 0; | |
540 | scsi_req->cdb[8] = 0; | |
541 | scsi_req->cdb[9] = 0; | |
542 | } | |
543 | ||
544 | static void | |
545 | skd_prep_discard_cdb(struct skd_scsi_request *scsi_req, | |
38d4a1bb MS |
546 | struct skd_request_context *skreq, |
547 | struct page *page, | |
548 | u32 lba, u32 count) | |
e67f86b3 AB |
549 | { |
550 | char *buf; | |
551 | unsigned long len; | |
552 | struct request *req; | |
553 | ||
554 | buf = page_address(page); | |
555 | len = SKD_DISCARD_CDB_LENGTH; | |
556 | ||
557 | scsi_req->cdb[0] = UNMAP; | |
558 | scsi_req->cdb[8] = len; | |
559 | ||
560 | put_unaligned_be16(6 + 16, &buf[0]); | |
561 | put_unaligned_be16(16, &buf[2]); | |
562 | put_unaligned_be64(lba, &buf[8]); | |
563 | put_unaligned_be32(count, &buf[16]); | |
564 | ||
fcd37eb3 JA |
565 | req = skreq->req; |
566 | blk_add_request_payload(req, page, len); | |
567 | req->buffer = buf; | |
e67f86b3 AB |
568 | } |
569 | ||
570 | static void skd_request_fn_not_online(struct request_queue *q); | |
571 | ||
572 | static void skd_request_fn(struct request_queue *q) | |
573 | { | |
574 | struct skd_device *skdev = q->queuedata; | |
575 | struct skd_fitmsg_context *skmsg = NULL; | |
576 | struct fit_msg_hdr *fmh = NULL; | |
577 | struct skd_request_context *skreq; | |
578 | struct request *req = NULL; | |
e67f86b3 AB |
579 | struct skd_scsi_request *scsi_req; |
580 | struct page *page; | |
581 | unsigned long io_flags; | |
582 | int error; | |
583 | u32 lba; | |
584 | u32 count; | |
585 | int data_dir; | |
586 | u32 be_lba; | |
587 | u32 be_count; | |
588 | u64 be_dmaa; | |
589 | u64 cmdctxt; | |
590 | u32 timo_slot; | |
591 | void *cmd_ptr; | |
592 | int flush, fua; | |
593 | ||
594 | if (skdev->state != SKD_DRVR_STATE_ONLINE) { | |
595 | skd_request_fn_not_online(q); | |
596 | return; | |
597 | } | |
598 | ||
6a5ec65b | 599 | if (blk_queue_stopped(skdev->queue)) { |
e67f86b3 AB |
600 | if (skdev->skmsg_free_list == NULL || |
601 | skdev->skreq_free_list == NULL || | |
602 | skdev->in_flight >= skdev->queue_low_water_mark) | |
603 | /* There is still some kind of shortage */ | |
604 | return; | |
605 | ||
6a5ec65b | 606 | queue_flag_clear(QUEUE_FLAG_STOPPED, skdev->queue); |
e67f86b3 AB |
607 | } |
608 | ||
609 | /* | |
610 | * Stop conditions: | |
611 | * - There are no more native requests | |
612 | * - There are already the maximum number of requests in progress | |
613 | * - There are no more skd_request_context entries | |
614 | * - There are no more FIT msg buffers | |
615 | */ | |
616 | for (;; ) { | |
617 | ||
618 | flush = fua = 0; | |
619 | ||
fcd37eb3 | 620 | req = blk_peek_request(q); |
e67f86b3 | 621 | |
fcd37eb3 JA |
622 | /* Are there any native requests to start? */ |
623 | if (req == NULL) | |
624 | break; | |
e67f86b3 | 625 | |
fcd37eb3 JA |
626 | lba = (u32)blk_rq_pos(req); |
627 | count = blk_rq_sectors(req); | |
628 | data_dir = rq_data_dir(req); | |
629 | io_flags = req->cmd_flags; | |
e67f86b3 | 630 | |
fcd37eb3 JA |
631 | if (io_flags & REQ_FLUSH) |
632 | flush++; | |
e67f86b3 | 633 | |
fcd37eb3 JA |
634 | if (io_flags & REQ_FUA) |
635 | fua++; | |
e67f86b3 | 636 | |
fcd37eb3 JA |
637 | pr_debug("%s:%s:%d new req=%p lba=%u(0x%x) " |
638 | "count=%u(0x%x) dir=%d\n", | |
639 | skdev->name, __func__, __LINE__, | |
640 | req, lba, lba, count, count, data_dir); | |
e67f86b3 | 641 | |
38d4a1bb | 642 | /* At this point we know there is a request */ |
e67f86b3 AB |
643 | |
644 | /* Are too many requets already in progress? */ | |
645 | if (skdev->in_flight >= skdev->cur_max_queue_depth) { | |
2e44b427 | 646 | pr_debug("%s:%s:%d qdepth %d, limit %d\n", |
647 | skdev->name, __func__, __LINE__, | |
648 | skdev->in_flight, skdev->cur_max_queue_depth); | |
e67f86b3 AB |
649 | break; |
650 | } | |
651 | ||
652 | /* Is a skd_request_context available? */ | |
653 | skreq = skdev->skreq_free_list; | |
654 | if (skreq == NULL) { | |
2e44b427 | 655 | pr_debug("%s:%s:%d Out of req=%p\n", |
656 | skdev->name, __func__, __LINE__, q); | |
e67f86b3 AB |
657 | break; |
658 | } | |
659 | SKD_ASSERT(skreq->state == SKD_REQ_STATE_IDLE); | |
660 | SKD_ASSERT((skreq->id & SKD_ID_INCR) == 0); | |
661 | ||
662 | /* Now we check to see if we can get a fit msg */ | |
663 | if (skmsg == NULL) { | |
664 | if (skdev->skmsg_free_list == NULL) { | |
2e44b427 | 665 | pr_debug("%s:%s:%d Out of msg\n", |
666 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
667 | break; |
668 | } | |
669 | } | |
670 | ||
671 | skreq->flush_cmd = 0; | |
672 | skreq->n_sg = 0; | |
673 | skreq->sg_byte_count = 0; | |
674 | skreq->discard_page = 0; | |
675 | ||
676 | /* | |
38d4a1bb | 677 | * OK to now dequeue request from q. |
e67f86b3 AB |
678 | * |
679 | * At this point we are comitted to either start or reject | |
680 | * the native request. Note that skd_request_context is | |
681 | * available but is still at the head of the free list. | |
682 | */ | |
fcd37eb3 JA |
683 | blk_start_request(req); |
684 | skreq->req = req; | |
685 | skreq->fitmsg_id = 0; | |
e67f86b3 AB |
686 | |
687 | /* Either a FIT msg is in progress or we have to start one. */ | |
688 | if (skmsg == NULL) { | |
689 | /* Are there any FIT msg buffers available? */ | |
690 | skmsg = skdev->skmsg_free_list; | |
691 | if (skmsg == NULL) { | |
2e44b427 | 692 | pr_debug("%s:%s:%d Out of msg skdev=%p\n", |
693 | skdev->name, __func__, __LINE__, | |
694 | skdev); | |
e67f86b3 AB |
695 | break; |
696 | } | |
697 | SKD_ASSERT(skmsg->state == SKD_MSG_STATE_IDLE); | |
698 | SKD_ASSERT((skmsg->id & SKD_ID_INCR) == 0); | |
699 | ||
700 | skdev->skmsg_free_list = skmsg->next; | |
701 | ||
702 | skmsg->state = SKD_MSG_STATE_BUSY; | |
703 | skmsg->id += SKD_ID_INCR; | |
704 | ||
705 | /* Initialize the FIT msg header */ | |
706 | fmh = (struct fit_msg_hdr *)skmsg->msg_buf; | |
707 | memset(fmh, 0, sizeof(*fmh)); | |
708 | fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; | |
709 | skmsg->length = sizeof(*fmh); | |
710 | } | |
711 | ||
712 | skreq->fitmsg_id = skmsg->id; | |
713 | ||
714 | /* | |
715 | * Note that a FIT msg may have just been started | |
716 | * but contains no SoFIT requests yet. | |
717 | */ | |
718 | ||
719 | /* | |
720 | * Transcode the request, checking as we go. The outcome of | |
721 | * the transcoding is represented by the error variable. | |
722 | */ | |
723 | cmd_ptr = &skmsg->msg_buf[skmsg->length]; | |
724 | memset(cmd_ptr, 0, 32); | |
725 | ||
726 | be_lba = cpu_to_be32(lba); | |
727 | be_count = cpu_to_be32(count); | |
728 | be_dmaa = cpu_to_be64((u64)skreq->sksg_dma_address); | |
729 | cmdctxt = skreq->id + SKD_ID_INCR; | |
730 | ||
731 | scsi_req = cmd_ptr; | |
732 | scsi_req->hdr.tag = cmdctxt; | |
733 | scsi_req->hdr.sg_list_dma_address = be_dmaa; | |
734 | ||
735 | if (data_dir == READ) | |
736 | skreq->sg_data_dir = SKD_DATA_DIR_CARD_TO_HOST; | |
737 | else | |
738 | skreq->sg_data_dir = SKD_DATA_DIR_HOST_TO_CARD; | |
739 | ||
740 | if (io_flags & REQ_DISCARD) { | |
741 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); | |
742 | if (!page) { | |
743 | pr_err("request_fn:Page allocation failed.\n"); | |
744 | skd_end_request(skdev, skreq, -ENOMEM); | |
745 | break; | |
746 | } | |
747 | skreq->discard_page = 1; | |
748 | skd_prep_discard_cdb(scsi_req, skreq, page, lba, count); | |
749 | ||
750 | } else if (flush == SKD_FLUSH_ZERO_SIZE_FIRST) { | |
751 | skd_prep_zerosize_flush_cdb(scsi_req, skreq); | |
752 | SKD_ASSERT(skreq->flush_cmd == 1); | |
753 | ||
754 | } else { | |
755 | skd_prep_rw_cdb(scsi_req, data_dir, lba, count); | |
756 | } | |
757 | ||
758 | if (fua) | |
759 | scsi_req->cdb[1] |= SKD_FUA_NV; | |
760 | ||
fcd37eb3 | 761 | if (!req->bio) |
e67f86b3 AB |
762 | goto skip_sg; |
763 | ||
764 | error = skd_preop_sg_list(skdev, skreq); | |
765 | ||
766 | if (error != 0) { | |
767 | /* | |
768 | * Complete the native request with error. | |
769 | * Note that the request context is still at the | |
770 | * head of the free list, and that the SoFIT request | |
771 | * was encoded into the FIT msg buffer but the FIT | |
772 | * msg length has not been updated. In short, the | |
773 | * only resource that has been allocated but might | |
774 | * not be used is that the FIT msg could be empty. | |
775 | */ | |
2e44b427 | 776 | pr_debug("%s:%s:%d error Out\n", |
777 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
778 | skd_end_request(skdev, skreq, error); |
779 | continue; | |
780 | } | |
781 | ||
782 | skip_sg: | |
783 | scsi_req->hdr.sg_list_len_bytes = | |
784 | cpu_to_be32(skreq->sg_byte_count); | |
785 | ||
786 | /* Complete resource allocations. */ | |
787 | skdev->skreq_free_list = skreq->next; | |
788 | skreq->state = SKD_REQ_STATE_BUSY; | |
789 | skreq->id += SKD_ID_INCR; | |
790 | ||
791 | skmsg->length += sizeof(struct skd_scsi_request); | |
792 | fmh->num_protocol_cmds_coalesced++; | |
793 | ||
794 | /* | |
795 | * Update the active request counts. | |
796 | * Capture the timeout timestamp. | |
797 | */ | |
798 | skreq->timeout_stamp = skdev->timeout_stamp; | |
799 | timo_slot = skreq->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; | |
800 | skdev->timeout_slot[timo_slot]++; | |
801 | skdev->in_flight++; | |
2e44b427 | 802 | pr_debug("%s:%s:%d req=0x%x busy=%d\n", |
803 | skdev->name, __func__, __LINE__, | |
804 | skreq->id, skdev->in_flight); | |
e67f86b3 AB |
805 | |
806 | /* | |
807 | * If the FIT msg buffer is full send it. | |
808 | */ | |
809 | if (skmsg->length >= SKD_N_FITMSG_BYTES || | |
810 | fmh->num_protocol_cmds_coalesced >= skd_max_req_per_msg) { | |
811 | skd_send_fitmsg(skdev, skmsg); | |
812 | skmsg = NULL; | |
813 | fmh = NULL; | |
814 | } | |
815 | } | |
816 | ||
817 | /* | |
818 | * Is a FIT msg in progress? If it is empty put the buffer back | |
819 | * on the free list. If it is non-empty send what we got. | |
820 | * This minimizes latency when there are fewer requests than | |
821 | * what fits in a FIT msg. | |
822 | */ | |
823 | if (skmsg != NULL) { | |
824 | /* Bigger than just a FIT msg header? */ | |
825 | if (skmsg->length > sizeof(struct fit_msg_hdr)) { | |
2e44b427 | 826 | pr_debug("%s:%s:%d sending msg=%p, len %d\n", |
827 | skdev->name, __func__, __LINE__, | |
828 | skmsg, skmsg->length); | |
e67f86b3 AB |
829 | skd_send_fitmsg(skdev, skmsg); |
830 | } else { | |
831 | /* | |
832 | * The FIT msg is empty. It means we got started | |
833 | * on the msg, but the requests were rejected. | |
834 | */ | |
835 | skmsg->state = SKD_MSG_STATE_IDLE; | |
836 | skmsg->id += SKD_ID_INCR; | |
837 | skmsg->next = skdev->skmsg_free_list; | |
838 | skdev->skmsg_free_list = skmsg; | |
839 | } | |
840 | skmsg = NULL; | |
841 | fmh = NULL; | |
842 | } | |
843 | ||
844 | /* | |
845 | * If req is non-NULL it means there is something to do but | |
846 | * we are out of a resource. | |
847 | */ | |
fcd37eb3 | 848 | if (req) |
6a5ec65b | 849 | blk_stop_queue(skdev->queue); |
e67f86b3 AB |
850 | } |
851 | ||
38d4a1bb MS |
852 | static void skd_end_request(struct skd_device *skdev, |
853 | struct skd_request_context *skreq, int error) | |
e67f86b3 AB |
854 | { |
855 | struct request *req = skreq->req; | |
856 | unsigned int io_flags = req->cmd_flags; | |
857 | ||
858 | if ((io_flags & REQ_DISCARD) && | |
859 | (skreq->discard_page == 1)) { | |
38d4a1bb | 860 | pr_debug("%s:%s:%d, free the page!", |
2e44b427 | 861 | skdev->name, __func__, __LINE__); |
e67f86b3 AB |
862 | free_page((unsigned long)req->buffer); |
863 | req->buffer = NULL; | |
864 | } | |
865 | ||
866 | if (unlikely(error)) { | |
867 | struct request *req = skreq->req; | |
868 | char *cmd = (rq_data_dir(req) == READ) ? "read" : "write"; | |
869 | u32 lba = (u32)blk_rq_pos(req); | |
870 | u32 count = blk_rq_sectors(req); | |
871 | ||
872 | pr_err("(%s): Error cmd=%s sect=%u count=%u id=0x%x\n", | |
873 | skd_name(skdev), cmd, lba, count, skreq->id); | |
874 | } else | |
2e44b427 | 875 | pr_debug("%s:%s:%d id=0x%x error=%d\n", |
876 | skdev->name, __func__, __LINE__, skreq->id, error); | |
e67f86b3 AB |
877 | |
878 | __blk_end_request_all(skreq->req, error); | |
879 | } | |
880 | ||
fcd37eb3 | 881 | static int skd_preop_sg_list(struct skd_device *skdev, |
38d4a1bb | 882 | struct skd_request_context *skreq) |
e67f86b3 AB |
883 | { |
884 | struct request *req = skreq->req; | |
885 | int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD; | |
886 | int pci_dir = writing ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE; | |
887 | struct scatterlist *sg = &skreq->sg[0]; | |
888 | int n_sg; | |
889 | int i; | |
890 | ||
891 | skreq->sg_byte_count = 0; | |
892 | ||
893 | /* SKD_ASSERT(skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD || | |
894 | skreq->sg_data_dir == SKD_DATA_DIR_CARD_TO_HOST); */ | |
895 | ||
896 | n_sg = blk_rq_map_sg(skdev->queue, req, sg); | |
897 | if (n_sg <= 0) | |
898 | return -EINVAL; | |
899 | ||
900 | /* | |
901 | * Map scatterlist to PCI bus addresses. | |
902 | * Note PCI might change the number of entries. | |
903 | */ | |
904 | n_sg = pci_map_sg(skdev->pdev, sg, n_sg, pci_dir); | |
905 | if (n_sg <= 0) | |
906 | return -EINVAL; | |
907 | ||
908 | SKD_ASSERT(n_sg <= skdev->sgs_per_request); | |
909 | ||
910 | skreq->n_sg = n_sg; | |
911 | ||
912 | for (i = 0; i < n_sg; i++) { | |
913 | struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; | |
914 | u32 cnt = sg_dma_len(&sg[i]); | |
915 | uint64_t dma_addr = sg_dma_address(&sg[i]); | |
916 | ||
917 | sgd->control = FIT_SGD_CONTROL_NOT_LAST; | |
918 | sgd->byte_count = cnt; | |
919 | skreq->sg_byte_count += cnt; | |
920 | sgd->host_side_addr = dma_addr; | |
921 | sgd->dev_side_addr = 0; | |
922 | } | |
923 | ||
924 | skreq->sksg_list[n_sg - 1].next_desc_ptr = 0LL; | |
925 | skreq->sksg_list[n_sg - 1].control = FIT_SGD_CONTROL_LAST; | |
926 | ||
927 | if (unlikely(skdev->dbg_level > 1)) { | |
2e44b427 | 928 | pr_debug("%s:%s:%d skreq=%x sksg_list=%p sksg_dma=%llx\n", |
929 | skdev->name, __func__, __LINE__, | |
930 | skreq->id, skreq->sksg_list, skreq->sksg_dma_address); | |
e67f86b3 AB |
931 | for (i = 0; i < n_sg; i++) { |
932 | struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; | |
2e44b427 | 933 | pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " |
934 | "addr=0x%llx next=0x%llx\n", | |
935 | skdev->name, __func__, __LINE__, | |
936 | i, sgd->byte_count, sgd->control, | |
937 | sgd->host_side_addr, sgd->next_desc_ptr); | |
e67f86b3 AB |
938 | } |
939 | } | |
940 | ||
941 | return 0; | |
942 | } | |
943 | ||
fcd37eb3 | 944 | static void skd_postop_sg_list(struct skd_device *skdev, |
38d4a1bb | 945 | struct skd_request_context *skreq) |
e67f86b3 AB |
946 | { |
947 | int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD; | |
948 | int pci_dir = writing ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE; | |
949 | ||
950 | /* | |
951 | * restore the next ptr for next IO request so we | |
952 | * don't have to set it every time. | |
953 | */ | |
954 | skreq->sksg_list[skreq->n_sg - 1].next_desc_ptr = | |
955 | skreq->sksg_dma_address + | |
956 | ((skreq->n_sg) * sizeof(struct fit_sg_descriptor)); | |
957 | pci_unmap_sg(skdev->pdev, &skreq->sg[0], skreq->n_sg, pci_dir); | |
958 | } | |
959 | ||
e67f86b3 AB |
960 | static void skd_request_fn_not_online(struct request_queue *q) |
961 | { | |
962 | struct skd_device *skdev = q->queuedata; | |
963 | int error; | |
964 | ||
965 | SKD_ASSERT(skdev->state != SKD_DRVR_STATE_ONLINE); | |
966 | ||
967 | skd_log_skdev(skdev, "req_not_online"); | |
968 | switch (skdev->state) { | |
969 | case SKD_DRVR_STATE_PAUSING: | |
970 | case SKD_DRVR_STATE_PAUSED: | |
971 | case SKD_DRVR_STATE_STARTING: | |
972 | case SKD_DRVR_STATE_RESTARTING: | |
973 | case SKD_DRVR_STATE_WAIT_BOOT: | |
974 | /* In case of starting, we haven't started the queue, | |
975 | * so we can't get here... but requests are | |
976 | * possibly hanging out waiting for us because we | |
977 | * reported the dev/skd0 already. They'll wait | |
978 | * forever if connect doesn't complete. | |
979 | * What to do??? delay dev/skd0 ?? | |
980 | */ | |
981 | case SKD_DRVR_STATE_BUSY: | |
982 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
983 | case SKD_DRVR_STATE_BUSY_ERASE: | |
984 | case SKD_DRVR_STATE_DRAINING_TIMEOUT: | |
985 | return; | |
986 | ||
987 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
988 | case SKD_DRVR_STATE_STOPPING: | |
989 | case SKD_DRVR_STATE_SYNCING: | |
990 | case SKD_DRVR_STATE_FAULT: | |
991 | case SKD_DRVR_STATE_DISAPPEARED: | |
992 | default: | |
993 | error = -EIO; | |
994 | break; | |
995 | } | |
996 | ||
997 | /* If we get here, terminate all pending block requeusts | |
998 | * with EIO and any scsi pass thru with appropriate sense | |
999 | */ | |
1000 | ||
1001 | skd_fail_all_pending(skdev); | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | ***************************************************************************** | |
1006 | * TIMER | |
1007 | ***************************************************************************** | |
1008 | */ | |
1009 | ||
1010 | static void skd_timer_tick_not_online(struct skd_device *skdev); | |
1011 | ||
1012 | static void skd_timer_tick(ulong arg) | |
1013 | { | |
1014 | struct skd_device *skdev = (struct skd_device *)arg; | |
1015 | ||
1016 | u32 timo_slot; | |
1017 | u32 overdue_timestamp; | |
1018 | unsigned long reqflags; | |
1019 | u32 state; | |
1020 | ||
1021 | if (skdev->state == SKD_DRVR_STATE_FAULT) | |
1022 | /* The driver has declared fault, and we want it to | |
1023 | * stay that way until driver is reloaded. | |
1024 | */ | |
1025 | return; | |
1026 | ||
1027 | spin_lock_irqsave(&skdev->lock, reqflags); | |
1028 | ||
1029 | state = SKD_READL(skdev, FIT_STATUS); | |
1030 | state &= FIT_SR_DRIVE_STATE_MASK; | |
1031 | if (state != skdev->drive_state) | |
1032 | skd_isr_fwstate(skdev); | |
1033 | ||
1034 | if (skdev->state != SKD_DRVR_STATE_ONLINE) { | |
1035 | skd_timer_tick_not_online(skdev); | |
1036 | goto timer_func_out; | |
1037 | } | |
1038 | skdev->timeout_stamp++; | |
1039 | timo_slot = skdev->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; | |
1040 | ||
1041 | /* | |
1042 | * All requests that happened during the previous use of | |
1043 | * this slot should be done by now. The previous use was | |
1044 | * over 7 seconds ago. | |
1045 | */ | |
1046 | if (skdev->timeout_slot[timo_slot] == 0) | |
1047 | goto timer_func_out; | |
1048 | ||
1049 | /* Something is overdue */ | |
1050 | overdue_timestamp = skdev->timeout_stamp - SKD_N_TIMEOUT_SLOT; | |
1051 | ||
2e44b427 | 1052 | pr_debug("%s:%s:%d found %d timeouts, draining busy=%d\n", |
1053 | skdev->name, __func__, __LINE__, | |
1054 | skdev->timeout_slot[timo_slot], skdev->in_flight); | |
e67f86b3 AB |
1055 | pr_err("(%s): Overdue IOs (%d), busy %d\n", |
1056 | skd_name(skdev), skdev->timeout_slot[timo_slot], | |
1057 | skdev->in_flight); | |
1058 | ||
1059 | skdev->timer_countdown = SKD_DRAINING_TIMO; | |
1060 | skdev->state = SKD_DRVR_STATE_DRAINING_TIMEOUT; | |
1061 | skdev->timo_slot = timo_slot; | |
6a5ec65b | 1062 | blk_stop_queue(skdev->queue); |
e67f86b3 AB |
1063 | |
1064 | timer_func_out: | |
1065 | mod_timer(&skdev->timer, (jiffies + HZ)); | |
1066 | ||
1067 | spin_unlock_irqrestore(&skdev->lock, reqflags); | |
1068 | } | |
1069 | ||
1070 | static void skd_timer_tick_not_online(struct skd_device *skdev) | |
1071 | { | |
1072 | switch (skdev->state) { | |
1073 | case SKD_DRVR_STATE_IDLE: | |
1074 | case SKD_DRVR_STATE_LOAD: | |
1075 | break; | |
1076 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
2e44b427 | 1077 | pr_debug("%s:%s:%d drive busy sanitize[%x], driver[%x]\n", |
1078 | skdev->name, __func__, __LINE__, | |
1079 | skdev->drive_state, skdev->state); | |
e67f86b3 AB |
1080 | /* If we've been in sanitize for 3 seconds, we figure we're not |
1081 | * going to get anymore completions, so recover requests now | |
1082 | */ | |
1083 | if (skdev->timer_countdown > 0) { | |
1084 | skdev->timer_countdown--; | |
1085 | return; | |
1086 | } | |
1087 | skd_recover_requests(skdev, 0); | |
1088 | break; | |
1089 | ||
1090 | case SKD_DRVR_STATE_BUSY: | |
1091 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
1092 | case SKD_DRVR_STATE_BUSY_ERASE: | |
2e44b427 | 1093 | pr_debug("%s:%s:%d busy[%x], countdown=%d\n", |
1094 | skdev->name, __func__, __LINE__, | |
1095 | skdev->state, skdev->timer_countdown); | |
e67f86b3 AB |
1096 | if (skdev->timer_countdown > 0) { |
1097 | skdev->timer_countdown--; | |
1098 | return; | |
1099 | } | |
2e44b427 | 1100 | pr_debug("%s:%s:%d busy[%x], timedout=%d, restarting device.", |
1101 | skdev->name, __func__, __LINE__, | |
1102 | skdev->state, skdev->timer_countdown); | |
e67f86b3 AB |
1103 | skd_restart_device(skdev); |
1104 | break; | |
1105 | ||
1106 | case SKD_DRVR_STATE_WAIT_BOOT: | |
1107 | case SKD_DRVR_STATE_STARTING: | |
1108 | if (skdev->timer_countdown > 0) { | |
1109 | skdev->timer_countdown--; | |
1110 | return; | |
1111 | } | |
1112 | /* For now, we fault the drive. Could attempt resets to | |
1113 | * revcover at some point. */ | |
1114 | skdev->state = SKD_DRVR_STATE_FAULT; | |
1115 | ||
1116 | pr_err("(%s): DriveFault Connect Timeout (%x)\n", | |
1117 | skd_name(skdev), skdev->drive_state); | |
1118 | ||
1119 | /*start the queue so we can respond with error to requests */ | |
1120 | /* wakeup anyone waiting for startup complete */ | |
6a5ec65b | 1121 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
1122 | skdev->gendisk_on = -1; |
1123 | wake_up_interruptible(&skdev->waitq); | |
1124 | break; | |
1125 | ||
1126 | case SKD_DRVR_STATE_ONLINE: | |
1127 | /* shouldn't get here. */ | |
1128 | break; | |
1129 | ||
1130 | case SKD_DRVR_STATE_PAUSING: | |
1131 | case SKD_DRVR_STATE_PAUSED: | |
1132 | break; | |
1133 | ||
1134 | case SKD_DRVR_STATE_DRAINING_TIMEOUT: | |
2e44b427 | 1135 | pr_debug("%s:%s:%d " |
1136 | "draining busy [%d] tick[%d] qdb[%d] tmls[%d]\n", | |
1137 | skdev->name, __func__, __LINE__, | |
1138 | skdev->timo_slot, | |
1139 | skdev->timer_countdown, | |
1140 | skdev->in_flight, | |
1141 | skdev->timeout_slot[skdev->timo_slot]); | |
e67f86b3 AB |
1142 | /* if the slot has cleared we can let the I/O continue */ |
1143 | if (skdev->timeout_slot[skdev->timo_slot] == 0) { | |
2e44b427 | 1144 | pr_debug("%s:%s:%d Slot drained, starting queue.\n", |
1145 | skdev->name, __func__, __LINE__); | |
e67f86b3 | 1146 | skdev->state = SKD_DRVR_STATE_ONLINE; |
6a5ec65b | 1147 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
1148 | return; |
1149 | } | |
1150 | if (skdev->timer_countdown > 0) { | |
1151 | skdev->timer_countdown--; | |
1152 | return; | |
1153 | } | |
1154 | skd_restart_device(skdev); | |
1155 | break; | |
1156 | ||
1157 | case SKD_DRVR_STATE_RESTARTING: | |
1158 | if (skdev->timer_countdown > 0) { | |
1159 | skdev->timer_countdown--; | |
1160 | return; | |
1161 | } | |
1162 | /* For now, we fault the drive. Could attempt resets to | |
1163 | * revcover at some point. */ | |
1164 | skdev->state = SKD_DRVR_STATE_FAULT; | |
1165 | pr_err("(%s): DriveFault Reconnect Timeout (%x)\n", | |
1166 | skd_name(skdev), skdev->drive_state); | |
1167 | ||
1168 | /* | |
1169 | * Recovering does two things: | |
1170 | * 1. completes IO with error | |
1171 | * 2. reclaims dma resources | |
1172 | * When is it safe to recover requests? | |
1173 | * - if the drive state is faulted | |
1174 | * - if the state is still soft reset after out timeout | |
1175 | * - if the drive registers are dead (state = FF) | |
1176 | * If it is "unsafe", we still need to recover, so we will | |
1177 | * disable pci bus mastering and disable our interrupts. | |
1178 | */ | |
1179 | ||
1180 | if ((skdev->drive_state == FIT_SR_DRIVE_SOFT_RESET) || | |
1181 | (skdev->drive_state == FIT_SR_DRIVE_FAULT) || | |
1182 | (skdev->drive_state == FIT_SR_DRIVE_STATE_MASK)) | |
1183 | /* It never came out of soft reset. Try to | |
1184 | * recover the requests and then let them | |
1185 | * fail. This is to mitigate hung processes. */ | |
1186 | skd_recover_requests(skdev, 0); | |
1187 | else { | |
1188 | pr_err("(%s): Disable BusMaster (%x)\n", | |
1189 | skd_name(skdev), skdev->drive_state); | |
1190 | pci_disable_device(skdev->pdev); | |
1191 | skd_disable_interrupts(skdev); | |
1192 | skd_recover_requests(skdev, 0); | |
1193 | } | |
1194 | ||
1195 | /*start the queue so we can respond with error to requests */ | |
1196 | /* wakeup anyone waiting for startup complete */ | |
6a5ec65b | 1197 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
1198 | skdev->gendisk_on = -1; |
1199 | wake_up_interruptible(&skdev->waitq); | |
1200 | break; | |
1201 | ||
1202 | case SKD_DRVR_STATE_RESUMING: | |
1203 | case SKD_DRVR_STATE_STOPPING: | |
1204 | case SKD_DRVR_STATE_SYNCING: | |
1205 | case SKD_DRVR_STATE_FAULT: | |
1206 | case SKD_DRVR_STATE_DISAPPEARED: | |
1207 | default: | |
1208 | break; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | static int skd_start_timer(struct skd_device *skdev) | |
1213 | { | |
1214 | int rc; | |
1215 | ||
1216 | init_timer(&skdev->timer); | |
1217 | setup_timer(&skdev->timer, skd_timer_tick, (ulong)skdev); | |
1218 | ||
1219 | rc = mod_timer(&skdev->timer, (jiffies + HZ)); | |
1220 | if (rc) | |
1221 | pr_err("%s: failed to start timer %d\n", | |
1222 | __func__, rc); | |
1223 | return rc; | |
1224 | } | |
1225 | ||
1226 | static void skd_kill_timer(struct skd_device *skdev) | |
1227 | { | |
1228 | del_timer_sync(&skdev->timer); | |
1229 | } | |
1230 | ||
1231 | /* | |
1232 | ***************************************************************************** | |
1233 | * IOCTL | |
1234 | ***************************************************************************** | |
1235 | */ | |
1236 | static int skd_ioctl_sg_io(struct skd_device *skdev, | |
1237 | fmode_t mode, void __user *argp); | |
1238 | static int skd_sg_io_get_and_check_args(struct skd_device *skdev, | |
1239 | struct skd_sg_io *sksgio); | |
1240 | static int skd_sg_io_obtain_skspcl(struct skd_device *skdev, | |
1241 | struct skd_sg_io *sksgio); | |
1242 | static int skd_sg_io_prep_buffering(struct skd_device *skdev, | |
1243 | struct skd_sg_io *sksgio); | |
1244 | static int skd_sg_io_copy_buffer(struct skd_device *skdev, | |
1245 | struct skd_sg_io *sksgio, int dxfer_dir); | |
1246 | static int skd_sg_io_send_fitmsg(struct skd_device *skdev, | |
1247 | struct skd_sg_io *sksgio); | |
1248 | static int skd_sg_io_await(struct skd_device *skdev, struct skd_sg_io *sksgio); | |
1249 | static int skd_sg_io_release_skspcl(struct skd_device *skdev, | |
1250 | struct skd_sg_io *sksgio); | |
1251 | static int skd_sg_io_put_status(struct skd_device *skdev, | |
1252 | struct skd_sg_io *sksgio); | |
1253 | ||
1254 | static void skd_complete_special(struct skd_device *skdev, | |
1255 | volatile struct fit_completion_entry_v1 | |
1256 | *skcomp, | |
1257 | volatile struct fit_comp_error_info *skerr, | |
1258 | struct skd_special_context *skspcl); | |
1259 | ||
1260 | static int skd_bdev_ioctl(struct block_device *bdev, fmode_t mode, | |
1261 | uint cmd_in, ulong arg) | |
1262 | { | |
1263 | int rc = 0; | |
1264 | struct gendisk *disk = bdev->bd_disk; | |
1265 | struct skd_device *skdev = disk->private_data; | |
1266 | void __user *p = (void *)arg; | |
1267 | ||
2e44b427 | 1268 | pr_debug("%s:%s:%d %s: CMD[%s] ioctl mode 0x%x, cmd 0x%x arg %0lx\n", |
1269 | skdev->name, __func__, __LINE__, | |
1270 | disk->disk_name, current->comm, mode, cmd_in, arg); | |
e67f86b3 AB |
1271 | |
1272 | if (!capable(CAP_SYS_ADMIN)) | |
1273 | return -EPERM; | |
1274 | ||
1275 | switch (cmd_in) { | |
1276 | case SG_SET_TIMEOUT: | |
1277 | case SG_GET_TIMEOUT: | |
1278 | case SG_GET_VERSION_NUM: | |
1279 | rc = scsi_cmd_ioctl(disk->queue, disk, mode, cmd_in, p); | |
1280 | break; | |
1281 | case SG_IO: | |
1282 | rc = skd_ioctl_sg_io(skdev, mode, p); | |
1283 | break; | |
1284 | ||
1285 | default: | |
1286 | rc = -ENOTTY; | |
1287 | break; | |
1288 | } | |
1289 | ||
2e44b427 | 1290 | pr_debug("%s:%s:%d %s: completion rc %d\n", |
1291 | skdev->name, __func__, __LINE__, disk->disk_name, rc); | |
e67f86b3 AB |
1292 | return rc; |
1293 | } | |
1294 | ||
1295 | static int skd_ioctl_sg_io(struct skd_device *skdev, fmode_t mode, | |
1296 | void __user *argp) | |
1297 | { | |
1298 | int rc; | |
1299 | struct skd_sg_io sksgio; | |
1300 | ||
1301 | memset(&sksgio, 0, sizeof(sksgio)); | |
1302 | sksgio.mode = mode; | |
1303 | sksgio.argp = argp; | |
1304 | sksgio.iov = &sksgio.no_iov_iov; | |
1305 | ||
1306 | switch (skdev->state) { | |
1307 | case SKD_DRVR_STATE_ONLINE: | |
1308 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
1309 | break; | |
1310 | ||
1311 | default: | |
2e44b427 | 1312 | pr_debug("%s:%s:%d drive not online\n", |
1313 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
1314 | rc = -ENXIO; |
1315 | goto out; | |
1316 | } | |
1317 | ||
f721bb0d AB |
1318 | rc = skd_sg_io_get_and_check_args(skdev, &sksgio); |
1319 | if (rc) | |
1320 | goto out; | |
1321 | ||
1322 | rc = skd_sg_io_obtain_skspcl(skdev, &sksgio); | |
1323 | if (rc) | |
1324 | goto out; | |
1325 | ||
1326 | rc = skd_sg_io_prep_buffering(skdev, &sksgio); | |
1327 | if (rc) | |
1328 | goto out; | |
1329 | ||
1330 | rc = skd_sg_io_copy_buffer(skdev, &sksgio, SG_DXFER_TO_DEV); | |
1331 | if (rc) | |
e67f86b3 AB |
1332 | goto out; |
1333 | ||
f721bb0d AB |
1334 | rc = skd_sg_io_send_fitmsg(skdev, &sksgio); |
1335 | if (rc) | |
e67f86b3 AB |
1336 | goto out; |
1337 | ||
f721bb0d AB |
1338 | rc = skd_sg_io_await(skdev, &sksgio); |
1339 | if (rc) | |
1340 | goto out; | |
1341 | ||
1342 | rc = skd_sg_io_copy_buffer(skdev, &sksgio, SG_DXFER_FROM_DEV); | |
1343 | if (rc) | |
1344 | goto out; | |
1345 | ||
1346 | rc = skd_sg_io_put_status(skdev, &sksgio); | |
1347 | if (rc) | |
e67f86b3 AB |
1348 | goto out; |
1349 | ||
1350 | rc = 0; | |
1351 | ||
1352 | out: | |
1353 | skd_sg_io_release_skspcl(skdev, &sksgio); | |
1354 | ||
1355 | if (sksgio.iov != NULL && sksgio.iov != &sksgio.no_iov_iov) | |
1356 | kfree(sksgio.iov); | |
1357 | return rc; | |
1358 | } | |
1359 | ||
1360 | static int skd_sg_io_get_and_check_args(struct skd_device *skdev, | |
1361 | struct skd_sg_io *sksgio) | |
1362 | { | |
1363 | struct sg_io_hdr *sgp = &sksgio->sg; | |
1364 | int i, acc; | |
1365 | ||
1366 | if (!access_ok(VERIFY_WRITE, sksgio->argp, sizeof(sg_io_hdr_t))) { | |
2e44b427 | 1367 | pr_debug("%s:%s:%d access sg failed %p\n", |
1368 | skdev->name, __func__, __LINE__, sksgio->argp); | |
e67f86b3 AB |
1369 | return -EFAULT; |
1370 | } | |
1371 | ||
1372 | if (__copy_from_user(sgp, sksgio->argp, sizeof(sg_io_hdr_t))) { | |
2e44b427 | 1373 | pr_debug("%s:%s:%d copy_from_user sg failed %p\n", |
1374 | skdev->name, __func__, __LINE__, sksgio->argp); | |
e67f86b3 AB |
1375 | return -EFAULT; |
1376 | } | |
1377 | ||
1378 | if (sgp->interface_id != SG_INTERFACE_ID_ORIG) { | |
2e44b427 | 1379 | pr_debug("%s:%s:%d interface_id invalid 0x%x\n", |
1380 | skdev->name, __func__, __LINE__, sgp->interface_id); | |
e67f86b3 AB |
1381 | return -EINVAL; |
1382 | } | |
1383 | ||
1384 | if (sgp->cmd_len > sizeof(sksgio->cdb)) { | |
2e44b427 | 1385 | pr_debug("%s:%s:%d cmd_len invalid %d\n", |
1386 | skdev->name, __func__, __LINE__, sgp->cmd_len); | |
e67f86b3 AB |
1387 | return -EINVAL; |
1388 | } | |
1389 | ||
1390 | if (sgp->iovec_count > 256) { | |
2e44b427 | 1391 | pr_debug("%s:%s:%d iovec_count invalid %d\n", |
1392 | skdev->name, __func__, __LINE__, sgp->iovec_count); | |
e67f86b3 AB |
1393 | return -EINVAL; |
1394 | } | |
1395 | ||
1396 | if (sgp->dxfer_len > (PAGE_SIZE * SKD_N_SG_PER_SPECIAL)) { | |
2e44b427 | 1397 | pr_debug("%s:%s:%d dxfer_len invalid %d\n", |
1398 | skdev->name, __func__, __LINE__, sgp->dxfer_len); | |
e67f86b3 AB |
1399 | return -EINVAL; |
1400 | } | |
1401 | ||
1402 | switch (sgp->dxfer_direction) { | |
1403 | case SG_DXFER_NONE: | |
1404 | acc = -1; | |
1405 | break; | |
1406 | ||
1407 | case SG_DXFER_TO_DEV: | |
1408 | acc = VERIFY_READ; | |
1409 | break; | |
1410 | ||
1411 | case SG_DXFER_FROM_DEV: | |
1412 | case SG_DXFER_TO_FROM_DEV: | |
1413 | acc = VERIFY_WRITE; | |
1414 | break; | |
1415 | ||
1416 | default: | |
2e44b427 | 1417 | pr_debug("%s:%s:%d dxfer_dir invalid %d\n", |
1418 | skdev->name, __func__, __LINE__, sgp->dxfer_direction); | |
e67f86b3 AB |
1419 | return -EINVAL; |
1420 | } | |
1421 | ||
1422 | if (copy_from_user(sksgio->cdb, sgp->cmdp, sgp->cmd_len)) { | |
2e44b427 | 1423 | pr_debug("%s:%s:%d copy_from_user cmdp failed %p\n", |
1424 | skdev->name, __func__, __LINE__, sgp->cmdp); | |
e67f86b3 AB |
1425 | return -EFAULT; |
1426 | } | |
1427 | ||
1428 | if (sgp->mx_sb_len != 0) { | |
1429 | if (!access_ok(VERIFY_WRITE, sgp->sbp, sgp->mx_sb_len)) { | |
2e44b427 | 1430 | pr_debug("%s:%s:%d access sbp failed %p\n", |
1431 | skdev->name, __func__, __LINE__, sgp->sbp); | |
e67f86b3 AB |
1432 | return -EFAULT; |
1433 | } | |
1434 | } | |
1435 | ||
1436 | if (sgp->iovec_count == 0) { | |
1437 | sksgio->iov[0].iov_base = sgp->dxferp; | |
1438 | sksgio->iov[0].iov_len = sgp->dxfer_len; | |
1439 | sksgio->iovcnt = 1; | |
1440 | sksgio->dxfer_len = sgp->dxfer_len; | |
1441 | } else { | |
1442 | struct sg_iovec *iov; | |
1443 | uint nbytes = sizeof(*iov) * sgp->iovec_count; | |
1444 | size_t iov_data_len; | |
1445 | ||
1446 | iov = kmalloc(nbytes, GFP_KERNEL); | |
1447 | if (iov == NULL) { | |
2e44b427 | 1448 | pr_debug("%s:%s:%d alloc iovec failed %d\n", |
1449 | skdev->name, __func__, __LINE__, | |
1450 | sgp->iovec_count); | |
e67f86b3 AB |
1451 | return -ENOMEM; |
1452 | } | |
1453 | sksgio->iov = iov; | |
1454 | sksgio->iovcnt = sgp->iovec_count; | |
1455 | ||
1456 | if (copy_from_user(iov, sgp->dxferp, nbytes)) { | |
2e44b427 | 1457 | pr_debug("%s:%s:%d copy_from_user iovec failed %p\n", |
1458 | skdev->name, __func__, __LINE__, sgp->dxferp); | |
e67f86b3 AB |
1459 | return -EFAULT; |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * Sum up the vecs, making sure they don't overflow | |
1464 | */ | |
1465 | iov_data_len = 0; | |
1466 | for (i = 0; i < sgp->iovec_count; i++) { | |
1467 | if (iov_data_len + iov[i].iov_len < iov_data_len) | |
1468 | return -EINVAL; | |
1469 | iov_data_len += iov[i].iov_len; | |
1470 | } | |
1471 | ||
1472 | /* SG_IO howto says that the shorter of the two wins */ | |
1473 | if (sgp->dxfer_len < iov_data_len) { | |
1474 | sksgio->iovcnt = iov_shorten((struct iovec *)iov, | |
1475 | sgp->iovec_count, | |
1476 | sgp->dxfer_len); | |
1477 | sksgio->dxfer_len = sgp->dxfer_len; | |
1478 | } else | |
1479 | sksgio->dxfer_len = iov_data_len; | |
1480 | } | |
1481 | ||
1482 | if (sgp->dxfer_direction != SG_DXFER_NONE) { | |
1483 | struct sg_iovec *iov = sksgio->iov; | |
1484 | for (i = 0; i < sksgio->iovcnt; i++, iov++) { | |
1485 | if (!access_ok(acc, iov->iov_base, iov->iov_len)) { | |
2e44b427 | 1486 | pr_debug("%s:%s:%d access data failed %p/%d\n", |
1487 | skdev->name, __func__, __LINE__, | |
1488 | iov->iov_base, (int)iov->iov_len); | |
e67f86b3 AB |
1489 | return -EFAULT; |
1490 | } | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | static int skd_sg_io_obtain_skspcl(struct skd_device *skdev, | |
1498 | struct skd_sg_io *sksgio) | |
1499 | { | |
1500 | struct skd_special_context *skspcl = NULL; | |
1501 | int rc; | |
1502 | ||
38d4a1bb | 1503 | for (;;) { |
e67f86b3 AB |
1504 | ulong flags; |
1505 | ||
1506 | spin_lock_irqsave(&skdev->lock, flags); | |
1507 | skspcl = skdev->skspcl_free_list; | |
1508 | if (skspcl != NULL) { | |
1509 | skdev->skspcl_free_list = | |
1510 | (struct skd_special_context *)skspcl->req.next; | |
1511 | skspcl->req.id += SKD_ID_INCR; | |
1512 | skspcl->req.state = SKD_REQ_STATE_SETUP; | |
1513 | skspcl->orphaned = 0; | |
1514 | skspcl->req.n_sg = 0; | |
1515 | } | |
1516 | spin_unlock_irqrestore(&skdev->lock, flags); | |
1517 | ||
1518 | if (skspcl != NULL) { | |
1519 | rc = 0; | |
1520 | break; | |
1521 | } | |
1522 | ||
2e44b427 | 1523 | pr_debug("%s:%s:%d blocking\n", |
1524 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
1525 | |
1526 | rc = wait_event_interruptible_timeout( | |
1527 | skdev->waitq, | |
1528 | (skdev->skspcl_free_list != NULL), | |
1529 | msecs_to_jiffies(sksgio->sg.timeout)); | |
1530 | ||
2e44b427 | 1531 | pr_debug("%s:%s:%d unblocking, rc=%d\n", |
1532 | skdev->name, __func__, __LINE__, rc); | |
e67f86b3 AB |
1533 | |
1534 | if (rc <= 0) { | |
1535 | if (rc == 0) | |
1536 | rc = -ETIMEDOUT; | |
1537 | else | |
1538 | rc = -EINTR; | |
1539 | break; | |
1540 | } | |
1541 | /* | |
1542 | * If we get here rc > 0 meaning the timeout to | |
1543 | * wait_event_interruptible_timeout() had time left, hence the | |
1544 | * sought event -- non-empty free list -- happened. | |
1545 | * Retry the allocation. | |
1546 | */ | |
1547 | } | |
1548 | sksgio->skspcl = skspcl; | |
1549 | ||
1550 | return rc; | |
1551 | } | |
1552 | ||
1553 | static int skd_skreq_prep_buffering(struct skd_device *skdev, | |
1554 | struct skd_request_context *skreq, | |
1555 | u32 dxfer_len) | |
1556 | { | |
1557 | u32 resid = dxfer_len; | |
1558 | ||
1559 | /* | |
1560 | * The DMA engine must have aligned addresses and byte counts. | |
1561 | */ | |
1562 | resid += (-resid) & 3; | |
1563 | skreq->sg_byte_count = resid; | |
1564 | ||
1565 | skreq->n_sg = 0; | |
1566 | ||
1567 | while (resid > 0) { | |
1568 | u32 nbytes = PAGE_SIZE; | |
1569 | u32 ix = skreq->n_sg; | |
1570 | struct scatterlist *sg = &skreq->sg[ix]; | |
1571 | struct fit_sg_descriptor *sksg = &skreq->sksg_list[ix]; | |
1572 | struct page *page; | |
1573 | ||
1574 | if (nbytes > resid) | |
1575 | nbytes = resid; | |
1576 | ||
1577 | page = alloc_page(GFP_KERNEL); | |
1578 | if (page == NULL) | |
1579 | return -ENOMEM; | |
1580 | ||
1581 | sg_set_page(sg, page, nbytes, 0); | |
1582 | ||
1583 | /* TODO: This should be going through a pci_???() | |
1584 | * routine to do proper mapping. */ | |
1585 | sksg->control = FIT_SGD_CONTROL_NOT_LAST; | |
1586 | sksg->byte_count = nbytes; | |
1587 | ||
1588 | sksg->host_side_addr = sg_phys(sg); | |
1589 | ||
1590 | sksg->dev_side_addr = 0; | |
1591 | sksg->next_desc_ptr = skreq->sksg_dma_address + | |
1592 | (ix + 1) * sizeof(*sksg); | |
1593 | ||
1594 | skreq->n_sg++; | |
1595 | resid -= nbytes; | |
1596 | } | |
1597 | ||
1598 | if (skreq->n_sg > 0) { | |
1599 | u32 ix = skreq->n_sg - 1; | |
1600 | struct fit_sg_descriptor *sksg = &skreq->sksg_list[ix]; | |
1601 | ||
1602 | sksg->control = FIT_SGD_CONTROL_LAST; | |
1603 | sksg->next_desc_ptr = 0; | |
1604 | } | |
1605 | ||
1606 | if (unlikely(skdev->dbg_level > 1)) { | |
1607 | u32 i; | |
1608 | ||
2e44b427 | 1609 | pr_debug("%s:%s:%d skreq=%x sksg_list=%p sksg_dma=%llx\n", |
1610 | skdev->name, __func__, __LINE__, | |
1611 | skreq->id, skreq->sksg_list, skreq->sksg_dma_address); | |
e67f86b3 AB |
1612 | for (i = 0; i < skreq->n_sg; i++) { |
1613 | struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; | |
1614 | ||
2e44b427 | 1615 | pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " |
1616 | "addr=0x%llx next=0x%llx\n", | |
1617 | skdev->name, __func__, __LINE__, | |
1618 | i, sgd->byte_count, sgd->control, | |
1619 | sgd->host_side_addr, sgd->next_desc_ptr); | |
e67f86b3 AB |
1620 | } |
1621 | } | |
1622 | ||
1623 | return 0; | |
1624 | } | |
1625 | ||
1626 | static int skd_sg_io_prep_buffering(struct skd_device *skdev, | |
1627 | struct skd_sg_io *sksgio) | |
1628 | { | |
1629 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1630 | struct skd_request_context *skreq = &skspcl->req; | |
1631 | u32 dxfer_len = sksgio->dxfer_len; | |
1632 | int rc; | |
1633 | ||
1634 | rc = skd_skreq_prep_buffering(skdev, skreq, dxfer_len); | |
1635 | /* | |
1636 | * Eventually, errors or not, skd_release_special() is called | |
1637 | * to recover allocations including partial allocations. | |
1638 | */ | |
1639 | return rc; | |
1640 | } | |
1641 | ||
1642 | static int skd_sg_io_copy_buffer(struct skd_device *skdev, | |
1643 | struct skd_sg_io *sksgio, int dxfer_dir) | |
1644 | { | |
1645 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1646 | u32 iov_ix = 0; | |
1647 | struct sg_iovec curiov; | |
1648 | u32 sksg_ix = 0; | |
1649 | u8 *bufp = NULL; | |
1650 | u32 buf_len = 0; | |
1651 | u32 resid = sksgio->dxfer_len; | |
1652 | int rc; | |
1653 | ||
1654 | curiov.iov_len = 0; | |
1655 | curiov.iov_base = NULL; | |
1656 | ||
1657 | if (dxfer_dir != sksgio->sg.dxfer_direction) { | |
1658 | if (dxfer_dir != SG_DXFER_TO_DEV || | |
1659 | sksgio->sg.dxfer_direction != SG_DXFER_TO_FROM_DEV) | |
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | while (resid > 0) { | |
1664 | u32 nbytes = PAGE_SIZE; | |
1665 | ||
1666 | if (curiov.iov_len == 0) { | |
1667 | curiov = sksgio->iov[iov_ix++]; | |
1668 | continue; | |
1669 | } | |
1670 | ||
1671 | if (buf_len == 0) { | |
1672 | struct page *page; | |
1673 | page = sg_page(&skspcl->req.sg[sksg_ix++]); | |
1674 | bufp = page_address(page); | |
1675 | buf_len = PAGE_SIZE; | |
1676 | } | |
1677 | ||
1678 | nbytes = min_t(u32, nbytes, resid); | |
1679 | nbytes = min_t(u32, nbytes, curiov.iov_len); | |
1680 | nbytes = min_t(u32, nbytes, buf_len); | |
1681 | ||
1682 | if (dxfer_dir == SG_DXFER_TO_DEV) | |
1683 | rc = __copy_from_user(bufp, curiov.iov_base, nbytes); | |
1684 | else | |
1685 | rc = __copy_to_user(curiov.iov_base, bufp, nbytes); | |
1686 | ||
1687 | if (rc) | |
1688 | return -EFAULT; | |
1689 | ||
1690 | resid -= nbytes; | |
1691 | curiov.iov_len -= nbytes; | |
1692 | curiov.iov_base += nbytes; | |
1693 | buf_len -= nbytes; | |
1694 | } | |
1695 | ||
1696 | return 0; | |
1697 | } | |
1698 | ||
1699 | static int skd_sg_io_send_fitmsg(struct skd_device *skdev, | |
1700 | struct skd_sg_io *sksgio) | |
1701 | { | |
1702 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1703 | struct fit_msg_hdr *fmh = (struct fit_msg_hdr *)skspcl->msg_buf; | |
1704 | struct skd_scsi_request *scsi_req = (struct skd_scsi_request *)&fmh[1]; | |
1705 | ||
1706 | memset(skspcl->msg_buf, 0, SKD_N_SPECIAL_FITMSG_BYTES); | |
1707 | ||
1708 | /* Initialize the FIT msg header */ | |
1709 | fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; | |
1710 | fmh->num_protocol_cmds_coalesced = 1; | |
1711 | ||
1712 | /* Initialize the SCSI request */ | |
1713 | if (sksgio->sg.dxfer_direction != SG_DXFER_NONE) | |
1714 | scsi_req->hdr.sg_list_dma_address = | |
1715 | cpu_to_be64(skspcl->req.sksg_dma_address); | |
1716 | scsi_req->hdr.tag = skspcl->req.id; | |
1717 | scsi_req->hdr.sg_list_len_bytes = | |
1718 | cpu_to_be32(skspcl->req.sg_byte_count); | |
1719 | memcpy(scsi_req->cdb, sksgio->cdb, sizeof(scsi_req->cdb)); | |
1720 | ||
1721 | skspcl->req.state = SKD_REQ_STATE_BUSY; | |
1722 | skd_send_special_fitmsg(skdev, skspcl); | |
1723 | ||
1724 | return 0; | |
1725 | } | |
1726 | ||
1727 | static int skd_sg_io_await(struct skd_device *skdev, struct skd_sg_io *sksgio) | |
1728 | { | |
1729 | unsigned long flags; | |
1730 | int rc; | |
1731 | ||
1732 | rc = wait_event_interruptible_timeout(skdev->waitq, | |
1733 | (sksgio->skspcl->req.state != | |
1734 | SKD_REQ_STATE_BUSY), | |
1735 | msecs_to_jiffies(sksgio->sg. | |
1736 | timeout)); | |
1737 | ||
1738 | spin_lock_irqsave(&skdev->lock, flags); | |
1739 | ||
1740 | if (sksgio->skspcl->req.state == SKD_REQ_STATE_ABORTED) { | |
2e44b427 | 1741 | pr_debug("%s:%s:%d skspcl %p aborted\n", |
1742 | skdev->name, __func__, __LINE__, sksgio->skspcl); | |
e67f86b3 AB |
1743 | |
1744 | /* Build check cond, sense and let command finish. */ | |
1745 | /* For a timeout, we must fabricate completion and sense | |
1746 | * data to complete the command */ | |
1747 | sksgio->skspcl->req.completion.status = | |
1748 | SAM_STAT_CHECK_CONDITION; | |
1749 | ||
1750 | memset(&sksgio->skspcl->req.err_info, 0, | |
1751 | sizeof(sksgio->skspcl->req.err_info)); | |
1752 | sksgio->skspcl->req.err_info.type = 0x70; | |
1753 | sksgio->skspcl->req.err_info.key = ABORTED_COMMAND; | |
1754 | sksgio->skspcl->req.err_info.code = 0x44; | |
1755 | sksgio->skspcl->req.err_info.qual = 0; | |
1756 | rc = 0; | |
1757 | } else if (sksgio->skspcl->req.state != SKD_REQ_STATE_BUSY) | |
1758 | /* No longer on the adapter. We finish. */ | |
1759 | rc = 0; | |
1760 | else { | |
1761 | /* Something's gone wrong. Still busy. Timeout or | |
1762 | * user interrupted (control-C). Mark as an orphan | |
1763 | * so it will be disposed when completed. */ | |
1764 | sksgio->skspcl->orphaned = 1; | |
1765 | sksgio->skspcl = NULL; | |
1766 | if (rc == 0) { | |
2e44b427 | 1767 | pr_debug("%s:%s:%d timed out %p (%u ms)\n", |
1768 | skdev->name, __func__, __LINE__, | |
1769 | sksgio, sksgio->sg.timeout); | |
e67f86b3 AB |
1770 | rc = -ETIMEDOUT; |
1771 | } else { | |
2e44b427 | 1772 | pr_debug("%s:%s:%d cntlc %p\n", |
1773 | skdev->name, __func__, __LINE__, sksgio); | |
e67f86b3 AB |
1774 | rc = -EINTR; |
1775 | } | |
1776 | } | |
1777 | ||
1778 | spin_unlock_irqrestore(&skdev->lock, flags); | |
1779 | ||
1780 | return rc; | |
1781 | } | |
1782 | ||
1783 | static int skd_sg_io_put_status(struct skd_device *skdev, | |
1784 | struct skd_sg_io *sksgio) | |
1785 | { | |
1786 | struct sg_io_hdr *sgp = &sksgio->sg; | |
1787 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1788 | int resid = 0; | |
1789 | ||
1790 | u32 nb = be32_to_cpu(skspcl->req.completion.num_returned_bytes); | |
1791 | ||
1792 | sgp->status = skspcl->req.completion.status; | |
1793 | resid = sksgio->dxfer_len - nb; | |
1794 | ||
1795 | sgp->masked_status = sgp->status & STATUS_MASK; | |
1796 | sgp->msg_status = 0; | |
1797 | sgp->host_status = 0; | |
1798 | sgp->driver_status = 0; | |
1799 | sgp->resid = resid; | |
1800 | if (sgp->masked_status || sgp->host_status || sgp->driver_status) | |
1801 | sgp->info |= SG_INFO_CHECK; | |
1802 | ||
2e44b427 | 1803 | pr_debug("%s:%s:%d status %x masked %x resid 0x%x\n", |
1804 | skdev->name, __func__, __LINE__, | |
1805 | sgp->status, sgp->masked_status, sgp->resid); | |
e67f86b3 AB |
1806 | |
1807 | if (sgp->masked_status == SAM_STAT_CHECK_CONDITION) { | |
1808 | if (sgp->mx_sb_len > 0) { | |
1809 | struct fit_comp_error_info *ei = &skspcl->req.err_info; | |
1810 | u32 nbytes = sizeof(*ei); | |
1811 | ||
1812 | nbytes = min_t(u32, nbytes, sgp->mx_sb_len); | |
1813 | ||
1814 | sgp->sb_len_wr = nbytes; | |
1815 | ||
1816 | if (__copy_to_user(sgp->sbp, ei, nbytes)) { | |
2e44b427 | 1817 | pr_debug("%s:%s:%d copy_to_user sense failed %p\n", |
1818 | skdev->name, __func__, __LINE__, | |
1819 | sgp->sbp); | |
e67f86b3 AB |
1820 | return -EFAULT; |
1821 | } | |
1822 | } | |
1823 | } | |
1824 | ||
1825 | if (__copy_to_user(sksgio->argp, sgp, sizeof(sg_io_hdr_t))) { | |
2e44b427 | 1826 | pr_debug("%s:%s:%d copy_to_user sg failed %p\n", |
1827 | skdev->name, __func__, __LINE__, sksgio->argp); | |
e67f86b3 AB |
1828 | return -EFAULT; |
1829 | } | |
1830 | ||
1831 | return 0; | |
1832 | } | |
1833 | ||
1834 | static int skd_sg_io_release_skspcl(struct skd_device *skdev, | |
1835 | struct skd_sg_io *sksgio) | |
1836 | { | |
1837 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1838 | ||
1839 | if (skspcl != NULL) { | |
1840 | ulong flags; | |
1841 | ||
1842 | sksgio->skspcl = NULL; | |
1843 | ||
1844 | spin_lock_irqsave(&skdev->lock, flags); | |
1845 | skd_release_special(skdev, skspcl); | |
1846 | spin_unlock_irqrestore(&skdev->lock, flags); | |
1847 | } | |
1848 | ||
1849 | return 0; | |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | ***************************************************************************** | |
1854 | * INTERNAL REQUESTS -- generated by driver itself | |
1855 | ***************************************************************************** | |
1856 | */ | |
1857 | ||
1858 | static int skd_format_internal_skspcl(struct skd_device *skdev) | |
1859 | { | |
1860 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
1861 | struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[0]; | |
1862 | struct fit_msg_hdr *fmh; | |
1863 | uint64_t dma_address; | |
1864 | struct skd_scsi_request *scsi; | |
1865 | ||
1866 | fmh = (struct fit_msg_hdr *)&skspcl->msg_buf[0]; | |
1867 | fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; | |
1868 | fmh->num_protocol_cmds_coalesced = 1; | |
1869 | ||
1870 | scsi = (struct skd_scsi_request *)&skspcl->msg_buf[64]; | |
1871 | memset(scsi, 0, sizeof(*scsi)); | |
1872 | dma_address = skspcl->req.sksg_dma_address; | |
1873 | scsi->hdr.sg_list_dma_address = cpu_to_be64(dma_address); | |
1874 | sgd->control = FIT_SGD_CONTROL_LAST; | |
1875 | sgd->byte_count = 0; | |
1876 | sgd->host_side_addr = skspcl->db_dma_address; | |
1877 | sgd->dev_side_addr = 0; | |
1878 | sgd->next_desc_ptr = 0LL; | |
1879 | ||
1880 | return 1; | |
1881 | } | |
1882 | ||
1883 | #define WR_BUF_SIZE SKD_N_INTERNAL_BYTES | |
1884 | ||
1885 | static void skd_send_internal_skspcl(struct skd_device *skdev, | |
1886 | struct skd_special_context *skspcl, | |
1887 | u8 opcode) | |
1888 | { | |
1889 | struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[0]; | |
1890 | struct skd_scsi_request *scsi; | |
1891 | unsigned char *buf = skspcl->data_buf; | |
1892 | int i; | |
1893 | ||
1894 | if (skspcl->req.state != SKD_REQ_STATE_IDLE) | |
1895 | /* | |
1896 | * A refresh is already in progress. | |
1897 | * Just wait for it to finish. | |
1898 | */ | |
1899 | return; | |
1900 | ||
1901 | SKD_ASSERT((skspcl->req.id & SKD_ID_INCR) == 0); | |
1902 | skspcl->req.state = SKD_REQ_STATE_BUSY; | |
1903 | skspcl->req.id += SKD_ID_INCR; | |
1904 | ||
1905 | scsi = (struct skd_scsi_request *)&skspcl->msg_buf[64]; | |
1906 | scsi->hdr.tag = skspcl->req.id; | |
1907 | ||
1908 | memset(scsi->cdb, 0, sizeof(scsi->cdb)); | |
1909 | ||
1910 | switch (opcode) { | |
1911 | case TEST_UNIT_READY: | |
1912 | scsi->cdb[0] = TEST_UNIT_READY; | |
1913 | sgd->byte_count = 0; | |
1914 | scsi->hdr.sg_list_len_bytes = 0; | |
1915 | break; | |
1916 | ||
1917 | case READ_CAPACITY: | |
1918 | scsi->cdb[0] = READ_CAPACITY; | |
1919 | sgd->byte_count = SKD_N_READ_CAP_BYTES; | |
1920 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
1921 | break; | |
1922 | ||
1923 | case INQUIRY: | |
1924 | scsi->cdb[0] = INQUIRY; | |
1925 | scsi->cdb[1] = 0x01; /* evpd */ | |
1926 | scsi->cdb[2] = 0x80; /* serial number page */ | |
1927 | scsi->cdb[4] = 0x10; | |
1928 | sgd->byte_count = 16; | |
1929 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
1930 | break; | |
1931 | ||
1932 | case SYNCHRONIZE_CACHE: | |
1933 | scsi->cdb[0] = SYNCHRONIZE_CACHE; | |
1934 | sgd->byte_count = 0; | |
1935 | scsi->hdr.sg_list_len_bytes = 0; | |
1936 | break; | |
1937 | ||
1938 | case WRITE_BUFFER: | |
1939 | scsi->cdb[0] = WRITE_BUFFER; | |
1940 | scsi->cdb[1] = 0x02; | |
1941 | scsi->cdb[7] = (WR_BUF_SIZE & 0xFF00) >> 8; | |
1942 | scsi->cdb[8] = WR_BUF_SIZE & 0xFF; | |
1943 | sgd->byte_count = WR_BUF_SIZE; | |
1944 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
1945 | /* fill incrementing byte pattern */ | |
1946 | for (i = 0; i < sgd->byte_count; i++) | |
1947 | buf[i] = i & 0xFF; | |
1948 | break; | |
1949 | ||
1950 | case READ_BUFFER: | |
1951 | scsi->cdb[0] = READ_BUFFER; | |
1952 | scsi->cdb[1] = 0x02; | |
1953 | scsi->cdb[7] = (WR_BUF_SIZE & 0xFF00) >> 8; | |
1954 | scsi->cdb[8] = WR_BUF_SIZE & 0xFF; | |
1955 | sgd->byte_count = WR_BUF_SIZE; | |
1956 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
1957 | memset(skspcl->data_buf, 0, sgd->byte_count); | |
1958 | break; | |
1959 | ||
1960 | default: | |
1961 | SKD_ASSERT("Don't know what to send"); | |
1962 | return; | |
1963 | ||
1964 | } | |
1965 | skd_send_special_fitmsg(skdev, skspcl); | |
1966 | } | |
1967 | ||
1968 | static void skd_refresh_device_data(struct skd_device *skdev) | |
1969 | { | |
1970 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
1971 | ||
1972 | skd_send_internal_skspcl(skdev, skspcl, TEST_UNIT_READY); | |
1973 | } | |
1974 | ||
1975 | static int skd_chk_read_buf(struct skd_device *skdev, | |
1976 | struct skd_special_context *skspcl) | |
1977 | { | |
1978 | unsigned char *buf = skspcl->data_buf; | |
1979 | int i; | |
1980 | ||
1981 | /* check for incrementing byte pattern */ | |
1982 | for (i = 0; i < WR_BUF_SIZE; i++) | |
1983 | if (buf[i] != (i & 0xFF)) | |
1984 | return 1; | |
1985 | ||
1986 | return 0; | |
1987 | } | |
1988 | ||
1989 | static void skd_log_check_status(struct skd_device *skdev, u8 status, u8 key, | |
1990 | u8 code, u8 qual, u8 fruc) | |
1991 | { | |
1992 | /* If the check condition is of special interest, log a message */ | |
1993 | if ((status == SAM_STAT_CHECK_CONDITION) && (key == 0x02) | |
1994 | && (code == 0x04) && (qual == 0x06)) { | |
1995 | pr_err("(%s): *** LOST_WRITE_DATA ERROR *** key/asc/" | |
1996 | "ascq/fruc %02x/%02x/%02x/%02x\n", | |
1997 | skd_name(skdev), key, code, qual, fruc); | |
1998 | } | |
1999 | } | |
2000 | ||
2001 | static void skd_complete_internal(struct skd_device *skdev, | |
2002 | volatile struct fit_completion_entry_v1 | |
2003 | *skcomp, | |
2004 | volatile struct fit_comp_error_info *skerr, | |
2005 | struct skd_special_context *skspcl) | |
2006 | { | |
2007 | u8 *buf = skspcl->data_buf; | |
2008 | u8 status; | |
2009 | int i; | |
2010 | struct skd_scsi_request *scsi = | |
2011 | (struct skd_scsi_request *)&skspcl->msg_buf[64]; | |
2012 | ||
2013 | SKD_ASSERT(skspcl == &skdev->internal_skspcl); | |
2014 | ||
2e44b427 | 2015 | pr_debug("%s:%s:%d complete internal %x\n", |
2016 | skdev->name, __func__, __LINE__, scsi->cdb[0]); | |
e67f86b3 AB |
2017 | |
2018 | skspcl->req.completion = *skcomp; | |
2019 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
2020 | skspcl->req.id += SKD_ID_INCR; | |
2021 | ||
2022 | status = skspcl->req.completion.status; | |
2023 | ||
2024 | skd_log_check_status(skdev, status, skerr->key, skerr->code, | |
2025 | skerr->qual, skerr->fruc); | |
2026 | ||
2027 | switch (scsi->cdb[0]) { | |
2028 | case TEST_UNIT_READY: | |
2029 | if (status == SAM_STAT_GOOD) | |
2030 | skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); | |
2031 | else if ((status == SAM_STAT_CHECK_CONDITION) && | |
2032 | (skerr->key == MEDIUM_ERROR)) | |
2033 | skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); | |
2034 | else { | |
2035 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
2e44b427 | 2036 | pr_debug("%s:%s:%d TUR failed, don't send anymore state 0x%x\n", |
2037 | skdev->name, __func__, __LINE__, | |
2038 | skdev->state); | |
e67f86b3 AB |
2039 | return; |
2040 | } | |
2e44b427 | 2041 | pr_debug("%s:%s:%d **** TUR failed, retry skerr\n", |
2042 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2043 | skd_send_internal_skspcl(skdev, skspcl, 0x00); |
2044 | } | |
2045 | break; | |
2046 | ||
2047 | case WRITE_BUFFER: | |
2048 | if (status == SAM_STAT_GOOD) | |
2049 | skd_send_internal_skspcl(skdev, skspcl, READ_BUFFER); | |
2050 | else { | |
2051 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
2e44b427 | 2052 | pr_debug("%s:%s:%d write buffer failed, don't send anymore state 0x%x\n", |
2053 | skdev->name, __func__, __LINE__, | |
2054 | skdev->state); | |
e67f86b3 AB |
2055 | return; |
2056 | } | |
2e44b427 | 2057 | pr_debug("%s:%s:%d **** write buffer failed, retry skerr\n", |
2058 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2059 | skd_send_internal_skspcl(skdev, skspcl, 0x00); |
2060 | } | |
2061 | break; | |
2062 | ||
2063 | case READ_BUFFER: | |
2064 | if (status == SAM_STAT_GOOD) { | |
2065 | if (skd_chk_read_buf(skdev, skspcl) == 0) | |
2066 | skd_send_internal_skspcl(skdev, skspcl, | |
2067 | READ_CAPACITY); | |
2068 | else { | |
2069 | pr_err( | |
2070 | "(%s):*** W/R Buffer mismatch %d ***\n", | |
2071 | skd_name(skdev), skdev->connect_retries); | |
2072 | if (skdev->connect_retries < | |
2073 | SKD_MAX_CONNECT_RETRIES) { | |
2074 | skdev->connect_retries++; | |
2075 | skd_soft_reset(skdev); | |
2076 | } else { | |
2077 | pr_err( | |
2078 | "(%s): W/R Buffer Connect Error\n", | |
2079 | skd_name(skdev)); | |
2080 | return; | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | } else { | |
2085 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
2e44b427 | 2086 | pr_debug("%s:%s:%d " |
2087 | "read buffer failed, don't send anymore state 0x%x\n", | |
2088 | skdev->name, __func__, __LINE__, | |
2089 | skdev->state); | |
e67f86b3 AB |
2090 | return; |
2091 | } | |
2e44b427 | 2092 | pr_debug("%s:%s:%d " |
2093 | "**** read buffer failed, retry skerr\n", | |
2094 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2095 | skd_send_internal_skspcl(skdev, skspcl, 0x00); |
2096 | } | |
2097 | break; | |
2098 | ||
2099 | case READ_CAPACITY: | |
2100 | skdev->read_cap_is_valid = 0; | |
2101 | if (status == SAM_STAT_GOOD) { | |
2102 | skdev->read_cap_last_lba = | |
2103 | (buf[0] << 24) | (buf[1] << 16) | | |
2104 | (buf[2] << 8) | buf[3]; | |
2105 | skdev->read_cap_blocksize = | |
2106 | (buf[4] << 24) | (buf[5] << 16) | | |
2107 | (buf[6] << 8) | buf[7]; | |
2108 | ||
2e44b427 | 2109 | pr_debug("%s:%s:%d last lba %d, bs %d\n", |
2110 | skdev->name, __func__, __LINE__, | |
2111 | skdev->read_cap_last_lba, | |
2112 | skdev->read_cap_blocksize); | |
e67f86b3 AB |
2113 | |
2114 | set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); | |
2115 | ||
2116 | skdev->read_cap_is_valid = 1; | |
2117 | ||
2118 | skd_send_internal_skspcl(skdev, skspcl, INQUIRY); | |
2119 | } else if ((status == SAM_STAT_CHECK_CONDITION) && | |
2120 | (skerr->key == MEDIUM_ERROR)) { | |
2121 | skdev->read_cap_last_lba = ~0; | |
2122 | set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); | |
2e44b427 | 2123 | pr_debug("%s:%s:%d " |
2124 | "**** MEDIUM ERROR caused READCAP to fail, ignore failure and continue to inquiry\n", | |
2125 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2126 | skd_send_internal_skspcl(skdev, skspcl, INQUIRY); |
2127 | } else { | |
2e44b427 | 2128 | pr_debug("%s:%s:%d **** READCAP failed, retry TUR\n", |
2129 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2130 | skd_send_internal_skspcl(skdev, skspcl, |
2131 | TEST_UNIT_READY); | |
2132 | } | |
2133 | break; | |
2134 | ||
2135 | case INQUIRY: | |
2136 | skdev->inquiry_is_valid = 0; | |
2137 | if (status == SAM_STAT_GOOD) { | |
2138 | skdev->inquiry_is_valid = 1; | |
2139 | ||
2140 | for (i = 0; i < 12; i++) | |
2141 | skdev->inq_serial_num[i] = buf[i + 4]; | |
2142 | skdev->inq_serial_num[12] = 0; | |
2143 | } | |
2144 | ||
2145 | if (skd_unquiesce_dev(skdev) < 0) | |
2e44b427 | 2146 | pr_debug("%s:%s:%d **** failed, to ONLINE device\n", |
2147 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2148 | /* connection is complete */ |
2149 | skdev->connect_retries = 0; | |
2150 | break; | |
2151 | ||
2152 | case SYNCHRONIZE_CACHE: | |
2153 | if (status == SAM_STAT_GOOD) | |
2154 | skdev->sync_done = 1; | |
2155 | else | |
2156 | skdev->sync_done = -1; | |
2157 | wake_up_interruptible(&skdev->waitq); | |
2158 | break; | |
2159 | ||
2160 | default: | |
2161 | SKD_ASSERT("we didn't send this"); | |
2162 | } | |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | ***************************************************************************** | |
2167 | * FIT MESSAGES | |
2168 | ***************************************************************************** | |
2169 | */ | |
2170 | ||
2171 | static void skd_send_fitmsg(struct skd_device *skdev, | |
2172 | struct skd_fitmsg_context *skmsg) | |
2173 | { | |
2174 | u64 qcmd; | |
2175 | struct fit_msg_hdr *fmh; | |
2176 | ||
2e44b427 | 2177 | pr_debug("%s:%s:%d dma address 0x%llx, busy=%d\n", |
2178 | skdev->name, __func__, __LINE__, | |
2179 | skmsg->mb_dma_address, skdev->in_flight); | |
2180 | pr_debug("%s:%s:%d msg_buf 0x%p, offset %x\n", | |
2181 | skdev->name, __func__, __LINE__, | |
2182 | skmsg->msg_buf, skmsg->offset); | |
e67f86b3 AB |
2183 | |
2184 | qcmd = skmsg->mb_dma_address; | |
2185 | qcmd |= FIT_QCMD_QID_NORMAL; | |
2186 | ||
2187 | fmh = (struct fit_msg_hdr *)skmsg->msg_buf; | |
2188 | skmsg->outstanding = fmh->num_protocol_cmds_coalesced; | |
2189 | ||
2190 | if (unlikely(skdev->dbg_level > 1)) { | |
2191 | u8 *bp = (u8 *)skmsg->msg_buf; | |
2192 | int i; | |
2193 | for (i = 0; i < skmsg->length; i += 8) { | |
2e44b427 | 2194 | pr_debug("%s:%s:%d msg[%2d] %02x %02x %02x %02x " |
2195 | "%02x %02x %02x %02x\n", | |
2196 | skdev->name, __func__, __LINE__, | |
2197 | i, bp[i + 0], bp[i + 1], bp[i + 2], | |
2198 | bp[i + 3], bp[i + 4], bp[i + 5], | |
2199 | bp[i + 6], bp[i + 7]); | |
e67f86b3 AB |
2200 | if (i == 0) |
2201 | i = 64 - 8; | |
2202 | } | |
2203 | } | |
2204 | ||
2205 | if (skmsg->length > 256) | |
2206 | qcmd |= FIT_QCMD_MSGSIZE_512; | |
2207 | else if (skmsg->length > 128) | |
2208 | qcmd |= FIT_QCMD_MSGSIZE_256; | |
2209 | else if (skmsg->length > 64) | |
2210 | qcmd |= FIT_QCMD_MSGSIZE_128; | |
2211 | else | |
2212 | /* | |
2213 | * This makes no sense because the FIT msg header is | |
2214 | * 64 bytes. If the msg is only 64 bytes long it has | |
2215 | * no payload. | |
2216 | */ | |
2217 | qcmd |= FIT_QCMD_MSGSIZE_64; | |
2218 | ||
2219 | SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); | |
2220 | ||
2221 | } | |
2222 | ||
2223 | static void skd_send_special_fitmsg(struct skd_device *skdev, | |
2224 | struct skd_special_context *skspcl) | |
2225 | { | |
2226 | u64 qcmd; | |
2227 | ||
2228 | if (unlikely(skdev->dbg_level > 1)) { | |
2229 | u8 *bp = (u8 *)skspcl->msg_buf; | |
2230 | int i; | |
2231 | ||
2232 | for (i = 0; i < SKD_N_SPECIAL_FITMSG_BYTES; i += 8) { | |
2e44b427 | 2233 | pr_debug("%s:%s:%d spcl[%2d] %02x %02x %02x %02x " |
2234 | "%02x %02x %02x %02x\n", | |
2235 | skdev->name, __func__, __LINE__, i, | |
2236 | bp[i + 0], bp[i + 1], bp[i + 2], bp[i + 3], | |
2237 | bp[i + 4], bp[i + 5], bp[i + 6], bp[i + 7]); | |
e67f86b3 AB |
2238 | if (i == 0) |
2239 | i = 64 - 8; | |
2240 | } | |
2241 | ||
2e44b427 | 2242 | pr_debug("%s:%s:%d skspcl=%p id=%04x sksg_list=%p sksg_dma=%llx\n", |
2243 | skdev->name, __func__, __LINE__, | |
2244 | skspcl, skspcl->req.id, skspcl->req.sksg_list, | |
2245 | skspcl->req.sksg_dma_address); | |
e67f86b3 AB |
2246 | for (i = 0; i < skspcl->req.n_sg; i++) { |
2247 | struct fit_sg_descriptor *sgd = | |
2248 | &skspcl->req.sksg_list[i]; | |
2249 | ||
2e44b427 | 2250 | pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " |
2251 | "addr=0x%llx next=0x%llx\n", | |
2252 | skdev->name, __func__, __LINE__, | |
2253 | i, sgd->byte_count, sgd->control, | |
2254 | sgd->host_side_addr, sgd->next_desc_ptr); | |
e67f86b3 AB |
2255 | } |
2256 | } | |
2257 | ||
2258 | /* | |
2259 | * Special FIT msgs are always 128 bytes: a 64-byte FIT hdr | |
2260 | * and one 64-byte SSDI command. | |
2261 | */ | |
2262 | qcmd = skspcl->mb_dma_address; | |
2263 | qcmd |= FIT_QCMD_QID_NORMAL + FIT_QCMD_MSGSIZE_128; | |
2264 | ||
2265 | SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); | |
2266 | } | |
2267 | ||
2268 | /* | |
2269 | ***************************************************************************** | |
2270 | * COMPLETION QUEUE | |
2271 | ***************************************************************************** | |
2272 | */ | |
2273 | ||
2274 | static void skd_complete_other(struct skd_device *skdev, | |
2275 | volatile struct fit_completion_entry_v1 *skcomp, | |
2276 | volatile struct fit_comp_error_info *skerr); | |
2277 | ||
e67f86b3 AB |
2278 | struct sns_info { |
2279 | u8 type; | |
2280 | u8 stat; | |
2281 | u8 key; | |
2282 | u8 asc; | |
2283 | u8 ascq; | |
2284 | u8 mask; | |
2285 | enum skd_check_status_action action; | |
2286 | }; | |
2287 | ||
2288 | static struct sns_info skd_chkstat_table[] = { | |
2289 | /* Good */ | |
2290 | { 0x70, 0x02, RECOVERED_ERROR, 0, 0, 0x1c, | |
2291 | SKD_CHECK_STATUS_REPORT_GOOD }, | |
2292 | ||
2293 | /* Smart alerts */ | |
2294 | { 0x70, 0x02, NO_SENSE, 0x0B, 0x00, 0x1E, /* warnings */ | |
2295 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
2296 | { 0x70, 0x02, NO_SENSE, 0x5D, 0x00, 0x1E, /* thresholds */ | |
2297 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
2298 | { 0x70, 0x02, RECOVERED_ERROR, 0x0B, 0x01, 0x1F, /* temperature over trigger */ | |
2299 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
2300 | ||
2301 | /* Retry (with limits) */ | |
2302 | { 0x70, 0x02, 0x0B, 0, 0, 0x1C, /* This one is for DMA ERROR */ | |
2303 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
2304 | { 0x70, 0x02, 0x06, 0x0B, 0x00, 0x1E, /* warnings */ | |
2305 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
2306 | { 0x70, 0x02, 0x06, 0x5D, 0x00, 0x1E, /* thresholds */ | |
2307 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
2308 | { 0x70, 0x02, 0x06, 0x80, 0x30, 0x1F, /* backup power */ | |
2309 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
2310 | ||
2311 | /* Busy (or about to be) */ | |
2312 | { 0x70, 0x02, 0x06, 0x3f, 0x01, 0x1F, /* fw changed */ | |
2313 | SKD_CHECK_STATUS_BUSY_IMMINENT }, | |
2314 | }; | |
2315 | ||
2316 | /* | |
2317 | * Look up status and sense data to decide how to handle the error | |
2318 | * from the device. | |
2319 | * mask says which fields must match e.g., mask=0x18 means check | |
2320 | * type and stat, ignore key, asc, ascq. | |
2321 | */ | |
2322 | ||
38d4a1bb MS |
2323 | static enum skd_check_status_action |
2324 | skd_check_status(struct skd_device *skdev, | |
2325 | u8 cmp_status, volatile struct fit_comp_error_info *skerr) | |
e67f86b3 AB |
2326 | { |
2327 | int i, n; | |
2328 | ||
2329 | pr_err("(%s): key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", | |
2330 | skd_name(skdev), skerr->key, skerr->code, skerr->qual, | |
2331 | skerr->fruc); | |
2332 | ||
2e44b427 | 2333 | pr_debug("%s:%s:%d stat: t=%02x stat=%02x k=%02x c=%02x q=%02x fruc=%02x\n", |
2334 | skdev->name, __func__, __LINE__, skerr->type, cmp_status, | |
2335 | skerr->key, skerr->code, skerr->qual, skerr->fruc); | |
e67f86b3 AB |
2336 | |
2337 | /* Does the info match an entry in the good category? */ | |
2338 | n = sizeof(skd_chkstat_table) / sizeof(skd_chkstat_table[0]); | |
2339 | for (i = 0; i < n; i++) { | |
2340 | struct sns_info *sns = &skd_chkstat_table[i]; | |
2341 | ||
2342 | if (sns->mask & 0x10) | |
2343 | if (skerr->type != sns->type) | |
2344 | continue; | |
2345 | ||
2346 | if (sns->mask & 0x08) | |
2347 | if (cmp_status != sns->stat) | |
2348 | continue; | |
2349 | ||
2350 | if (sns->mask & 0x04) | |
2351 | if (skerr->key != sns->key) | |
2352 | continue; | |
2353 | ||
2354 | if (sns->mask & 0x02) | |
2355 | if (skerr->code != sns->asc) | |
2356 | continue; | |
2357 | ||
2358 | if (sns->mask & 0x01) | |
2359 | if (skerr->qual != sns->ascq) | |
2360 | continue; | |
2361 | ||
2362 | if (sns->action == SKD_CHECK_STATUS_REPORT_SMART_ALERT) { | |
2363 | pr_err("(%s): SMART Alert: sense key/asc/ascq " | |
2364 | "%02x/%02x/%02x\n", | |
2365 | skd_name(skdev), skerr->key, | |
2366 | skerr->code, skerr->qual); | |
2367 | } | |
2368 | return sns->action; | |
2369 | } | |
2370 | ||
2371 | /* No other match, so nonzero status means error, | |
2372 | * zero status means good | |
2373 | */ | |
2374 | if (cmp_status) { | |
2e44b427 | 2375 | pr_debug("%s:%s:%d status check: error\n", |
2376 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2377 | return SKD_CHECK_STATUS_REPORT_ERROR; |
2378 | } | |
2379 | ||
2e44b427 | 2380 | pr_debug("%s:%s:%d status check good default\n", |
2381 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2382 | return SKD_CHECK_STATUS_REPORT_GOOD; |
2383 | } | |
2384 | ||
2385 | static void skd_resolve_req_exception(struct skd_device *skdev, | |
2386 | struct skd_request_context *skreq) | |
2387 | { | |
2388 | u8 cmp_status = skreq->completion.status; | |
2389 | ||
2390 | switch (skd_check_status(skdev, cmp_status, &skreq->err_info)) { | |
2391 | case SKD_CHECK_STATUS_REPORT_GOOD: | |
2392 | case SKD_CHECK_STATUS_REPORT_SMART_ALERT: | |
2393 | skd_end_request(skdev, skreq, 0); | |
2394 | break; | |
2395 | ||
2396 | case SKD_CHECK_STATUS_BUSY_IMMINENT: | |
2397 | skd_log_skreq(skdev, skreq, "retry(busy)"); | |
38d4a1bb | 2398 | blk_requeue_request(skdev->queue, skreq->req); |
e67f86b3 AB |
2399 | pr_info("(%s) drive BUSY imminent\n", skd_name(skdev)); |
2400 | skdev->state = SKD_DRVR_STATE_BUSY_IMMINENT; | |
2401 | skdev->timer_countdown = SKD_TIMER_MINUTES(20); | |
2402 | skd_quiesce_dev(skdev); | |
2403 | break; | |
2404 | ||
2405 | case SKD_CHECK_STATUS_REQUEUE_REQUEST: | |
fcd37eb3 JA |
2406 | if ((unsigned long) ++skreq->req->special < SKD_MAX_RETRIES) { |
2407 | skd_log_skreq(skdev, skreq, "retry"); | |
38d4a1bb | 2408 | blk_requeue_request(skdev->queue, skreq->req); |
fcd37eb3 | 2409 | break; |
e67f86b3 AB |
2410 | } |
2411 | /* fall through to report error */ | |
2412 | ||
2413 | case SKD_CHECK_STATUS_REPORT_ERROR: | |
2414 | default: | |
2415 | skd_end_request(skdev, skreq, -EIO); | |
2416 | break; | |
2417 | } | |
2418 | } | |
2419 | ||
e67f86b3 AB |
2420 | /* assume spinlock is already held */ |
2421 | static void skd_release_skreq(struct skd_device *skdev, | |
2422 | struct skd_request_context *skreq) | |
2423 | { | |
2424 | u32 msg_slot; | |
2425 | struct skd_fitmsg_context *skmsg; | |
2426 | ||
2427 | u32 timo_slot; | |
2428 | ||
2429 | /* | |
2430 | * Reclaim the FIT msg buffer if this is | |
2431 | * the first of the requests it carried to | |
2432 | * be completed. The FIT msg buffer used to | |
2433 | * send this request cannot be reused until | |
2434 | * we are sure the s1120 card has copied | |
2435 | * it to its memory. The FIT msg might have | |
2436 | * contained several requests. As soon as | |
2437 | * any of them are completed we know that | |
2438 | * the entire FIT msg was transferred. | |
2439 | * Only the first completed request will | |
2440 | * match the FIT msg buffer id. The FIT | |
2441 | * msg buffer id is immediately updated. | |
2442 | * When subsequent requests complete the FIT | |
2443 | * msg buffer id won't match, so we know | |
2444 | * quite cheaply that it is already done. | |
2445 | */ | |
2446 | msg_slot = skreq->fitmsg_id & SKD_ID_SLOT_MASK; | |
2447 | SKD_ASSERT(msg_slot < skdev->num_fitmsg_context); | |
2448 | ||
2449 | skmsg = &skdev->skmsg_table[msg_slot]; | |
2450 | if (skmsg->id == skreq->fitmsg_id) { | |
2451 | SKD_ASSERT(skmsg->state == SKD_MSG_STATE_BUSY); | |
2452 | SKD_ASSERT(skmsg->outstanding > 0); | |
2453 | skmsg->outstanding--; | |
2454 | if (skmsg->outstanding == 0) { | |
2455 | skmsg->state = SKD_MSG_STATE_IDLE; | |
2456 | skmsg->id += SKD_ID_INCR; | |
2457 | skmsg->next = skdev->skmsg_free_list; | |
2458 | skdev->skmsg_free_list = skmsg; | |
2459 | } | |
2460 | } | |
2461 | ||
2462 | /* | |
2463 | * Decrease the number of active requests. | |
2464 | * Also decrements the count in the timeout slot. | |
2465 | */ | |
2466 | SKD_ASSERT(skdev->in_flight > 0); | |
2467 | skdev->in_flight -= 1; | |
2468 | ||
2469 | timo_slot = skreq->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; | |
2470 | SKD_ASSERT(skdev->timeout_slot[timo_slot] > 0); | |
2471 | skdev->timeout_slot[timo_slot] -= 1; | |
2472 | ||
2473 | /* | |
2474 | * Reset backpointer | |
2475 | */ | |
fcd37eb3 | 2476 | skreq->req = NULL; |
e67f86b3 AB |
2477 | |
2478 | /* | |
2479 | * Reclaim the skd_request_context | |
2480 | */ | |
2481 | skreq->state = SKD_REQ_STATE_IDLE; | |
2482 | skreq->id += SKD_ID_INCR; | |
2483 | skreq->next = skdev->skreq_free_list; | |
2484 | skdev->skreq_free_list = skreq; | |
2485 | } | |
2486 | ||
2487 | #define DRIVER_INQ_EVPD_PAGE_CODE 0xDA | |
2488 | ||
2489 | static void skd_do_inq_page_00(struct skd_device *skdev, | |
2490 | volatile struct fit_completion_entry_v1 *skcomp, | |
2491 | volatile struct fit_comp_error_info *skerr, | |
2492 | uint8_t *cdb, uint8_t *buf) | |
2493 | { | |
2494 | uint16_t insert_pt, max_bytes, drive_pages, drive_bytes, new_size; | |
2495 | ||
2496 | /* Caller requested "supported pages". The driver needs to insert | |
2497 | * its page. | |
2498 | */ | |
2e44b427 | 2499 | pr_debug("%s:%s:%d skd_do_driver_inquiry: modify supported pages.\n", |
2500 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2501 | |
2502 | /* If the device rejected the request because the CDB was | |
2503 | * improperly formed, then just leave. | |
2504 | */ | |
2505 | if (skcomp->status == SAM_STAT_CHECK_CONDITION && | |
2506 | skerr->key == ILLEGAL_REQUEST && skerr->code == 0x24) | |
2507 | return; | |
2508 | ||
2509 | /* Get the amount of space the caller allocated */ | |
2510 | max_bytes = (cdb[3] << 8) | cdb[4]; | |
2511 | ||
2512 | /* Get the number of pages actually returned by the device */ | |
2513 | drive_pages = (buf[2] << 8) | buf[3]; | |
2514 | drive_bytes = drive_pages + 4; | |
2515 | new_size = drive_pages + 1; | |
2516 | ||
2517 | /* Supported pages must be in numerical order, so find where | |
2518 | * the driver page needs to be inserted into the list of | |
2519 | * pages returned by the device. | |
2520 | */ | |
2521 | for (insert_pt = 4; insert_pt < drive_bytes; insert_pt++) { | |
2522 | if (buf[insert_pt] == DRIVER_INQ_EVPD_PAGE_CODE) | |
2523 | return; /* Device using this page code. abort */ | |
2524 | else if (buf[insert_pt] > DRIVER_INQ_EVPD_PAGE_CODE) | |
2525 | break; | |
2526 | } | |
2527 | ||
2528 | if (insert_pt < max_bytes) { | |
2529 | uint16_t u; | |
2530 | ||
2531 | /* Shift everything up one byte to make room. */ | |
2532 | for (u = new_size + 3; u > insert_pt; u--) | |
2533 | buf[u] = buf[u - 1]; | |
2534 | buf[insert_pt] = DRIVER_INQ_EVPD_PAGE_CODE; | |
2535 | ||
2536 | /* SCSI byte order increment of num_returned_bytes by 1 */ | |
2537 | skcomp->num_returned_bytes = | |
2538 | be32_to_cpu(skcomp->num_returned_bytes) + 1; | |
2539 | skcomp->num_returned_bytes = | |
2540 | be32_to_cpu(skcomp->num_returned_bytes); | |
2541 | } | |
2542 | ||
2543 | /* update page length field to reflect the driver's page too */ | |
2544 | buf[2] = (uint8_t)((new_size >> 8) & 0xFF); | |
2545 | buf[3] = (uint8_t)((new_size >> 0) & 0xFF); | |
2546 | } | |
2547 | ||
2548 | static void skd_get_link_info(struct pci_dev *pdev, u8 *speed, u8 *width) | |
2549 | { | |
2550 | int pcie_reg; | |
2551 | u16 pci_bus_speed; | |
2552 | u8 pci_lanes; | |
2553 | ||
2554 | pcie_reg = pci_find_capability(pdev, PCI_CAP_ID_EXP); | |
2555 | if (pcie_reg) { | |
2556 | u16 linksta; | |
2557 | pci_read_config_word(pdev, pcie_reg + PCI_EXP_LNKSTA, &linksta); | |
2558 | ||
2559 | pci_bus_speed = linksta & 0xF; | |
2560 | pci_lanes = (linksta & 0x3F0) >> 4; | |
2561 | } else { | |
2562 | *speed = STEC_LINK_UNKNOWN; | |
2563 | *width = 0xFF; | |
2564 | return; | |
2565 | } | |
2566 | ||
2567 | switch (pci_bus_speed) { | |
2568 | case 1: | |
2569 | *speed = STEC_LINK_2_5GTS; | |
2570 | break; | |
2571 | case 2: | |
2572 | *speed = STEC_LINK_5GTS; | |
2573 | break; | |
2574 | case 3: | |
2575 | *speed = STEC_LINK_8GTS; | |
2576 | break; | |
2577 | default: | |
2578 | *speed = STEC_LINK_UNKNOWN; | |
2579 | break; | |
2580 | } | |
2581 | ||
2582 | if (pci_lanes <= 0x20) | |
2583 | *width = pci_lanes; | |
2584 | else | |
2585 | *width = 0xFF; | |
2586 | } | |
2587 | ||
2588 | static void skd_do_inq_page_da(struct skd_device *skdev, | |
2589 | volatile struct fit_completion_entry_v1 *skcomp, | |
2590 | volatile struct fit_comp_error_info *skerr, | |
2591 | uint8_t *cdb, uint8_t *buf) | |
2592 | { | |
fec23f63 | 2593 | struct pci_dev *pdev = skdev->pdev; |
e67f86b3 AB |
2594 | unsigned max_bytes; |
2595 | struct driver_inquiry_data inq; | |
2596 | u16 val; | |
2597 | ||
2e44b427 | 2598 | pr_debug("%s:%s:%d skd_do_driver_inquiry: return driver page\n", |
2599 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2600 | |
2601 | memset(&inq, 0, sizeof(inq)); | |
2602 | ||
2603 | inq.page_code = DRIVER_INQ_EVPD_PAGE_CODE; | |
2604 | ||
fec23f63 BZ |
2605 | skd_get_link_info(pdev, &inq.pcie_link_speed, &inq.pcie_link_lanes); |
2606 | inq.pcie_bus_number = cpu_to_be16(pdev->bus->number); | |
2607 | inq.pcie_device_number = PCI_SLOT(pdev->devfn); | |
2608 | inq.pcie_function_number = PCI_FUNC(pdev->devfn); | |
e67f86b3 | 2609 | |
fec23f63 BZ |
2610 | pci_read_config_word(pdev, PCI_VENDOR_ID, &val); |
2611 | inq.pcie_vendor_id = cpu_to_be16(val); | |
e67f86b3 | 2612 | |
fec23f63 BZ |
2613 | pci_read_config_word(pdev, PCI_DEVICE_ID, &val); |
2614 | inq.pcie_device_id = cpu_to_be16(val); | |
e67f86b3 | 2615 | |
fec23f63 BZ |
2616 | pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &val); |
2617 | inq.pcie_subsystem_vendor_id = cpu_to_be16(val); | |
e67f86b3 | 2618 | |
fec23f63 BZ |
2619 | pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &val); |
2620 | inq.pcie_subsystem_device_id = cpu_to_be16(val); | |
e67f86b3 AB |
2621 | |
2622 | /* Driver version, fixed lenth, padded with spaces on the right */ | |
2623 | inq.driver_version_length = sizeof(inq.driver_version); | |
2624 | memset(&inq.driver_version, ' ', sizeof(inq.driver_version)); | |
2625 | memcpy(inq.driver_version, DRV_VER_COMPL, | |
2626 | min(sizeof(inq.driver_version), strlen(DRV_VER_COMPL))); | |
2627 | ||
2628 | inq.page_length = cpu_to_be16((sizeof(inq) - 4)); | |
2629 | ||
2630 | /* Clear the error set by the device */ | |
2631 | skcomp->status = SAM_STAT_GOOD; | |
2632 | memset((void *)skerr, 0, sizeof(*skerr)); | |
2633 | ||
2634 | /* copy response into output buffer */ | |
2635 | max_bytes = (cdb[3] << 8) | cdb[4]; | |
2636 | memcpy(buf, &inq, min_t(unsigned, max_bytes, sizeof(inq))); | |
2637 | ||
2638 | skcomp->num_returned_bytes = | |
2639 | be32_to_cpu(min_t(uint16_t, max_bytes, sizeof(inq))); | |
2640 | } | |
2641 | ||
2642 | static void skd_do_driver_inq(struct skd_device *skdev, | |
2643 | volatile struct fit_completion_entry_v1 *skcomp, | |
2644 | volatile struct fit_comp_error_info *skerr, | |
2645 | uint8_t *cdb, uint8_t *buf) | |
2646 | { | |
2647 | if (!buf) | |
2648 | return; | |
2649 | else if (cdb[0] != INQUIRY) | |
2650 | return; /* Not an INQUIRY */ | |
2651 | else if ((cdb[1] & 1) == 0) | |
2652 | return; /* EVPD not set */ | |
2653 | else if (cdb[2] == 0) | |
2654 | /* Need to add driver's page to supported pages list */ | |
2655 | skd_do_inq_page_00(skdev, skcomp, skerr, cdb, buf); | |
2656 | else if (cdb[2] == DRIVER_INQ_EVPD_PAGE_CODE) | |
2657 | /* Caller requested driver's page */ | |
2658 | skd_do_inq_page_da(skdev, skcomp, skerr, cdb, buf); | |
2659 | } | |
2660 | ||
2661 | static unsigned char *skd_sg_1st_page_ptr(struct scatterlist *sg) | |
2662 | { | |
2663 | if (!sg) | |
2664 | return NULL; | |
2665 | if (!sg_page(sg)) | |
2666 | return NULL; | |
2667 | return sg_virt(sg); | |
2668 | } | |
2669 | ||
2670 | static void skd_process_scsi_inq(struct skd_device *skdev, | |
2671 | volatile struct fit_completion_entry_v1 | |
2672 | *skcomp, | |
2673 | volatile struct fit_comp_error_info *skerr, | |
2674 | struct skd_special_context *skspcl) | |
2675 | { | |
2676 | uint8_t *buf; | |
2677 | struct fit_msg_hdr *fmh = (struct fit_msg_hdr *)skspcl->msg_buf; | |
2678 | struct skd_scsi_request *scsi_req = (struct skd_scsi_request *)&fmh[1]; | |
2679 | ||
2680 | dma_sync_sg_for_cpu(skdev->class_dev, skspcl->req.sg, skspcl->req.n_sg, | |
2681 | skspcl->req.sg_data_dir); | |
2682 | buf = skd_sg_1st_page_ptr(skspcl->req.sg); | |
2683 | ||
2684 | if (buf) | |
2685 | skd_do_driver_inq(skdev, skcomp, skerr, scsi_req->cdb, buf); | |
2686 | } | |
2687 | ||
2688 | ||
2689 | static int skd_isr_completion_posted(struct skd_device *skdev, | |
2690 | int limit, int *enqueued) | |
2691 | { | |
2692 | volatile struct fit_completion_entry_v1 *skcmp = NULL; | |
2693 | volatile struct fit_comp_error_info *skerr; | |
2694 | u16 req_id; | |
2695 | u32 req_slot; | |
2696 | struct skd_request_context *skreq; | |
2697 | u16 cmp_cntxt = 0; | |
2698 | u8 cmp_status = 0; | |
2699 | u8 cmp_cycle = 0; | |
2700 | u32 cmp_bytes = 0; | |
2701 | int rc = 0; | |
2702 | int processed = 0; | |
e67f86b3 AB |
2703 | |
2704 | for (;; ) { | |
2705 | SKD_ASSERT(skdev->skcomp_ix < SKD_N_COMPLETION_ENTRY); | |
2706 | ||
2707 | skcmp = &skdev->skcomp_table[skdev->skcomp_ix]; | |
2708 | cmp_cycle = skcmp->cycle; | |
2709 | cmp_cntxt = skcmp->tag; | |
2710 | cmp_status = skcmp->status; | |
2711 | cmp_bytes = be32_to_cpu(skcmp->num_returned_bytes); | |
2712 | ||
2713 | skerr = &skdev->skerr_table[skdev->skcomp_ix]; | |
2714 | ||
2e44b427 | 2715 | pr_debug("%s:%s:%d " |
2716 | "cycle=%d ix=%d got cycle=%d cmdctxt=0x%x stat=%d " | |
2717 | "busy=%d rbytes=0x%x proto=%d\n", | |
2718 | skdev->name, __func__, __LINE__, skdev->skcomp_cycle, | |
2719 | skdev->skcomp_ix, cmp_cycle, cmp_cntxt, cmp_status, | |
2720 | skdev->in_flight, cmp_bytes, skdev->proto_ver); | |
e67f86b3 AB |
2721 | |
2722 | if (cmp_cycle != skdev->skcomp_cycle) { | |
2e44b427 | 2723 | pr_debug("%s:%s:%d end of completions\n", |
2724 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2725 | break; |
2726 | } | |
2727 | /* | |
2728 | * Update the completion queue head index and possibly | |
2729 | * the completion cycle count. 8-bit wrap-around. | |
2730 | */ | |
2731 | skdev->skcomp_ix++; | |
2732 | if (skdev->skcomp_ix >= SKD_N_COMPLETION_ENTRY) { | |
2733 | skdev->skcomp_ix = 0; | |
2734 | skdev->skcomp_cycle++; | |
2735 | } | |
2736 | ||
2737 | /* | |
2738 | * The command context is a unique 32-bit ID. The low order | |
2739 | * bits help locate the request. The request is usually a | |
2740 | * r/w request (see skd_start() above) or a special request. | |
2741 | */ | |
2742 | req_id = cmp_cntxt; | |
2743 | req_slot = req_id & SKD_ID_SLOT_AND_TABLE_MASK; | |
2744 | ||
2745 | /* Is this other than a r/w request? */ | |
2746 | if (req_slot >= skdev->num_req_context) { | |
2747 | /* | |
2748 | * This is not a completion for a r/w request. | |
2749 | */ | |
2750 | skd_complete_other(skdev, skcmp, skerr); | |
2751 | continue; | |
2752 | } | |
2753 | ||
2754 | skreq = &skdev->skreq_table[req_slot]; | |
2755 | ||
2756 | /* | |
2757 | * Make sure the request ID for the slot matches. | |
2758 | */ | |
2759 | if (skreq->id != req_id) { | |
2e44b427 | 2760 | pr_debug("%s:%s:%d mismatch comp_id=0x%x req_id=0x%x\n", |
2761 | skdev->name, __func__, __LINE__, | |
2762 | req_id, skreq->id); | |
e67f86b3 AB |
2763 | { |
2764 | u16 new_id = cmp_cntxt; | |
2765 | pr_err("(%s): Completion mismatch " | |
2766 | "comp_id=0x%04x skreq=0x%04x new=0x%04x\n", | |
2767 | skd_name(skdev), req_id, | |
2768 | skreq->id, new_id); | |
2769 | ||
2770 | continue; | |
2771 | } | |
2772 | } | |
2773 | ||
2774 | SKD_ASSERT(skreq->state == SKD_REQ_STATE_BUSY); | |
2775 | ||
2776 | if (skreq->state == SKD_REQ_STATE_ABORTED) { | |
2e44b427 | 2777 | pr_debug("%s:%s:%d reclaim req %p id=%04x\n", |
2778 | skdev->name, __func__, __LINE__, | |
2779 | skreq, skreq->id); | |
e67f86b3 AB |
2780 | /* a previously timed out command can |
2781 | * now be cleaned up */ | |
2782 | skd_release_skreq(skdev, skreq); | |
2783 | continue; | |
2784 | } | |
2785 | ||
2786 | skreq->completion = *skcmp; | |
2787 | if (unlikely(cmp_status == SAM_STAT_CHECK_CONDITION)) { | |
2788 | skreq->err_info = *skerr; | |
2789 | skd_log_check_status(skdev, cmp_status, skerr->key, | |
2790 | skerr->code, skerr->qual, | |
2791 | skerr->fruc); | |
2792 | } | |
2793 | /* Release DMA resources for the request. */ | |
2794 | if (skreq->n_sg > 0) | |
2795 | skd_postop_sg_list(skdev, skreq); | |
2796 | ||
fcd37eb3 | 2797 | if (!skreq->req) { |
2e44b427 | 2798 | pr_debug("%s:%s:%d NULL backptr skdreq %p, " |
2799 | "req=0x%x req_id=0x%x\n", | |
2800 | skdev->name, __func__, __LINE__, | |
2801 | skreq, skreq->id, req_id); | |
e67f86b3 AB |
2802 | } else { |
2803 | /* | |
2804 | * Capture the outcome and post it back to the | |
2805 | * native request. | |
2806 | */ | |
fcd37eb3 JA |
2807 | if (likely(cmp_status == SAM_STAT_GOOD)) |
2808 | skd_end_request(skdev, skreq, 0); | |
2809 | else | |
e67f86b3 | 2810 | skd_resolve_req_exception(skdev, skreq); |
e67f86b3 AB |
2811 | } |
2812 | ||
2813 | /* | |
2814 | * Release the skreq, its FIT msg (if one), timeout slot, | |
2815 | * and queue depth. | |
2816 | */ | |
2817 | skd_release_skreq(skdev, skreq); | |
2818 | ||
2819 | /* skd_isr_comp_limit equal zero means no limit */ | |
2820 | if (limit) { | |
2821 | if (++processed >= limit) { | |
2822 | rc = 1; | |
2823 | break; | |
2824 | } | |
2825 | } | |
2826 | } | |
2827 | ||
2828 | if ((skdev->state == SKD_DRVR_STATE_PAUSING) | |
2829 | && (skdev->in_flight) == 0) { | |
2830 | skdev->state = SKD_DRVR_STATE_PAUSED; | |
2831 | wake_up_interruptible(&skdev->waitq); | |
2832 | } | |
2833 | ||
2834 | return rc; | |
2835 | } | |
2836 | ||
2837 | static void skd_complete_other(struct skd_device *skdev, | |
2838 | volatile struct fit_completion_entry_v1 *skcomp, | |
2839 | volatile struct fit_comp_error_info *skerr) | |
2840 | { | |
2841 | u32 req_id = 0; | |
2842 | u32 req_table; | |
2843 | u32 req_slot; | |
2844 | struct skd_special_context *skspcl; | |
2845 | ||
2846 | req_id = skcomp->tag; | |
2847 | req_table = req_id & SKD_ID_TABLE_MASK; | |
2848 | req_slot = req_id & SKD_ID_SLOT_MASK; | |
2849 | ||
2e44b427 | 2850 | pr_debug("%s:%s:%d table=0x%x id=0x%x slot=%d\n", |
2851 | skdev->name, __func__, __LINE__, | |
2852 | req_table, req_id, req_slot); | |
e67f86b3 AB |
2853 | |
2854 | /* | |
2855 | * Based on the request id, determine how to dispatch this completion. | |
2856 | * This swich/case is finding the good cases and forwarding the | |
2857 | * completion entry. Errors are reported below the switch. | |
2858 | */ | |
2859 | switch (req_table) { | |
2860 | case SKD_ID_RW_REQUEST: | |
2861 | /* | |
2862 | * The caller, skd_completion_posted_isr() above, | |
2863 | * handles r/w requests. The only way we get here | |
2864 | * is if the req_slot is out of bounds. | |
2865 | */ | |
2866 | break; | |
2867 | ||
2868 | case SKD_ID_SPECIAL_REQUEST: | |
2869 | /* | |
2870 | * Make sure the req_slot is in bounds and that the id | |
2871 | * matches. | |
2872 | */ | |
2873 | if (req_slot < skdev->n_special) { | |
2874 | skspcl = &skdev->skspcl_table[req_slot]; | |
2875 | if (skspcl->req.id == req_id && | |
2876 | skspcl->req.state == SKD_REQ_STATE_BUSY) { | |
2877 | skd_complete_special(skdev, | |
2878 | skcomp, skerr, skspcl); | |
2879 | return; | |
2880 | } | |
2881 | } | |
2882 | break; | |
2883 | ||
2884 | case SKD_ID_INTERNAL: | |
2885 | if (req_slot == 0) { | |
2886 | skspcl = &skdev->internal_skspcl; | |
2887 | if (skspcl->req.id == req_id && | |
2888 | skspcl->req.state == SKD_REQ_STATE_BUSY) { | |
2889 | skd_complete_internal(skdev, | |
2890 | skcomp, skerr, skspcl); | |
2891 | return; | |
2892 | } | |
2893 | } | |
2894 | break; | |
2895 | ||
2896 | case SKD_ID_FIT_MSG: | |
2897 | /* | |
2898 | * These id's should never appear in a completion record. | |
2899 | */ | |
2900 | break; | |
2901 | ||
2902 | default: | |
2903 | /* | |
2904 | * These id's should never appear anywhere; | |
2905 | */ | |
2906 | break; | |
2907 | } | |
2908 | ||
2909 | /* | |
2910 | * If we get here it is a bad or stale id. | |
2911 | */ | |
2912 | } | |
2913 | ||
2914 | static void skd_complete_special(struct skd_device *skdev, | |
2915 | volatile struct fit_completion_entry_v1 | |
2916 | *skcomp, | |
2917 | volatile struct fit_comp_error_info *skerr, | |
2918 | struct skd_special_context *skspcl) | |
2919 | { | |
2e44b427 | 2920 | pr_debug("%s:%s:%d completing special request %p\n", |
2921 | skdev->name, __func__, __LINE__, skspcl); | |
e67f86b3 AB |
2922 | if (skspcl->orphaned) { |
2923 | /* Discard orphaned request */ | |
2924 | /* ?: Can this release directly or does it need | |
2925 | * to use a worker? */ | |
2e44b427 | 2926 | pr_debug("%s:%s:%d release orphaned %p\n", |
2927 | skdev->name, __func__, __LINE__, skspcl); | |
e67f86b3 AB |
2928 | skd_release_special(skdev, skspcl); |
2929 | return; | |
2930 | } | |
2931 | ||
2932 | skd_process_scsi_inq(skdev, skcomp, skerr, skspcl); | |
2933 | ||
2934 | skspcl->req.state = SKD_REQ_STATE_COMPLETED; | |
2935 | skspcl->req.completion = *skcomp; | |
2936 | skspcl->req.err_info = *skerr; | |
2937 | ||
2938 | skd_log_check_status(skdev, skspcl->req.completion.status, skerr->key, | |
2939 | skerr->code, skerr->qual, skerr->fruc); | |
2940 | ||
2941 | wake_up_interruptible(&skdev->waitq); | |
2942 | } | |
2943 | ||
2944 | /* assume spinlock is already held */ | |
2945 | static void skd_release_special(struct skd_device *skdev, | |
2946 | struct skd_special_context *skspcl) | |
2947 | { | |
2948 | int i, was_depleted; | |
2949 | ||
2950 | for (i = 0; i < skspcl->req.n_sg; i++) { | |
e67f86b3 AB |
2951 | struct page *page = sg_page(&skspcl->req.sg[i]); |
2952 | __free_page(page); | |
2953 | } | |
2954 | ||
2955 | was_depleted = (skdev->skspcl_free_list == NULL); | |
2956 | ||
2957 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
2958 | skspcl->req.id += SKD_ID_INCR; | |
2959 | skspcl->req.next = | |
2960 | (struct skd_request_context *)skdev->skspcl_free_list; | |
2961 | skdev->skspcl_free_list = (struct skd_special_context *)skspcl; | |
2962 | ||
2963 | if (was_depleted) { | |
2e44b427 | 2964 | pr_debug("%s:%s:%d skspcl was depleted\n", |
2965 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2966 | /* Free list was depleted. Their might be waiters. */ |
2967 | wake_up_interruptible(&skdev->waitq); | |
2968 | } | |
2969 | } | |
2970 | ||
2971 | static void skd_reset_skcomp(struct skd_device *skdev) | |
2972 | { | |
2973 | u32 nbytes; | |
2974 | struct fit_completion_entry_v1 *skcomp; | |
2975 | ||
2976 | nbytes = sizeof(*skcomp) * SKD_N_COMPLETION_ENTRY; | |
2977 | nbytes += sizeof(struct fit_comp_error_info) * SKD_N_COMPLETION_ENTRY; | |
2978 | ||
2979 | memset(skdev->skcomp_table, 0, nbytes); | |
2980 | ||
2981 | skdev->skcomp_ix = 0; | |
2982 | skdev->skcomp_cycle = 1; | |
2983 | } | |
2984 | ||
2985 | /* | |
2986 | ***************************************************************************** | |
2987 | * INTERRUPTS | |
2988 | ***************************************************************************** | |
2989 | */ | |
2990 | static void skd_completion_worker(struct work_struct *work) | |
2991 | { | |
2992 | struct skd_device *skdev = | |
2993 | container_of(work, struct skd_device, completion_worker); | |
2994 | unsigned long flags; | |
2995 | int flush_enqueued = 0; | |
2996 | ||
2997 | spin_lock_irqsave(&skdev->lock, flags); | |
2998 | ||
2999 | /* | |
3000 | * pass in limit=0, which means no limit.. | |
3001 | * process everything in compq | |
3002 | */ | |
3003 | skd_isr_completion_posted(skdev, 0, &flush_enqueued); | |
3004 | skd_request_fn(skdev->queue); | |
3005 | ||
3006 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3007 | } | |
3008 | ||
3009 | static void skd_isr_msg_from_dev(struct skd_device *skdev); | |
3010 | ||
3011 | irqreturn_t | |
3012 | static skd_isr(int irq, void *ptr) | |
3013 | { | |
3014 | struct skd_device *skdev; | |
3015 | u32 intstat; | |
3016 | u32 ack; | |
3017 | int rc = 0; | |
3018 | int deferred = 0; | |
3019 | int flush_enqueued = 0; | |
3020 | ||
3021 | skdev = (struct skd_device *)ptr; | |
3022 | spin_lock(&skdev->lock); | |
3023 | ||
3024 | for (;; ) { | |
3025 | intstat = SKD_READL(skdev, FIT_INT_STATUS_HOST); | |
3026 | ||
3027 | ack = FIT_INT_DEF_MASK; | |
3028 | ack &= intstat; | |
3029 | ||
2e44b427 | 3030 | pr_debug("%s:%s:%d intstat=0x%x ack=0x%x\n", |
3031 | skdev->name, __func__, __LINE__, intstat, ack); | |
e67f86b3 AB |
3032 | |
3033 | /* As long as there is an int pending on device, keep | |
3034 | * running loop. When none, get out, but if we've never | |
3035 | * done any processing, call completion handler? | |
3036 | */ | |
3037 | if (ack == 0) { | |
3038 | /* No interrupts on device, but run the completion | |
3039 | * processor anyway? | |
3040 | */ | |
3041 | if (rc == 0) | |
3042 | if (likely (skdev->state | |
3043 | == SKD_DRVR_STATE_ONLINE)) | |
3044 | deferred = 1; | |
3045 | break; | |
3046 | } | |
3047 | ||
3048 | rc = IRQ_HANDLED; | |
3049 | ||
3050 | SKD_WRITEL(skdev, ack, FIT_INT_STATUS_HOST); | |
3051 | ||
3052 | if (likely((skdev->state != SKD_DRVR_STATE_LOAD) && | |
3053 | (skdev->state != SKD_DRVR_STATE_STOPPING))) { | |
3054 | if (intstat & FIT_ISH_COMPLETION_POSTED) { | |
3055 | /* | |
3056 | * If we have already deferred completion | |
3057 | * processing, don't bother running it again | |
3058 | */ | |
3059 | if (deferred == 0) | |
3060 | deferred = | |
3061 | skd_isr_completion_posted(skdev, | |
3062 | skd_isr_comp_limit, &flush_enqueued); | |
3063 | } | |
3064 | ||
3065 | if (intstat & FIT_ISH_FW_STATE_CHANGE) { | |
3066 | skd_isr_fwstate(skdev); | |
3067 | if (skdev->state == SKD_DRVR_STATE_FAULT || | |
3068 | skdev->state == | |
3069 | SKD_DRVR_STATE_DISAPPEARED) { | |
3070 | spin_unlock(&skdev->lock); | |
3071 | return rc; | |
3072 | } | |
3073 | } | |
3074 | ||
3075 | if (intstat & FIT_ISH_MSG_FROM_DEV) | |
3076 | skd_isr_msg_from_dev(skdev); | |
3077 | } | |
3078 | } | |
3079 | ||
3080 | if (unlikely(flush_enqueued)) | |
3081 | skd_request_fn(skdev->queue); | |
3082 | ||
3083 | if (deferred) | |
3084 | schedule_work(&skdev->completion_worker); | |
3085 | else if (!flush_enqueued) | |
3086 | skd_request_fn(skdev->queue); | |
3087 | ||
3088 | spin_unlock(&skdev->lock); | |
3089 | ||
3090 | return rc; | |
3091 | } | |
3092 | ||
e67f86b3 AB |
3093 | static void skd_drive_fault(struct skd_device *skdev) |
3094 | { | |
3095 | skdev->state = SKD_DRVR_STATE_FAULT; | |
3096 | pr_err("(%s): Drive FAULT\n", skd_name(skdev)); | |
3097 | } | |
3098 | ||
3099 | static void skd_drive_disappeared(struct skd_device *skdev) | |
3100 | { | |
3101 | skdev->state = SKD_DRVR_STATE_DISAPPEARED; | |
3102 | pr_err("(%s): Drive DISAPPEARED\n", skd_name(skdev)); | |
3103 | } | |
3104 | ||
3105 | static void skd_isr_fwstate(struct skd_device *skdev) | |
3106 | { | |
3107 | u32 sense; | |
3108 | u32 state; | |
3109 | u32 mtd; | |
3110 | int prev_driver_state = skdev->state; | |
3111 | ||
3112 | sense = SKD_READL(skdev, FIT_STATUS); | |
3113 | state = sense & FIT_SR_DRIVE_STATE_MASK; | |
3114 | ||
3115 | pr_err("(%s): s1120 state %s(%d)=>%s(%d)\n", | |
3116 | skd_name(skdev), | |
3117 | skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, | |
3118 | skd_drive_state_to_str(state), state); | |
3119 | ||
3120 | skdev->drive_state = state; | |
3121 | ||
3122 | switch (skdev->drive_state) { | |
3123 | case FIT_SR_DRIVE_INIT: | |
3124 | if (skdev->state == SKD_DRVR_STATE_PROTOCOL_MISMATCH) { | |
3125 | skd_disable_interrupts(skdev); | |
3126 | break; | |
3127 | } | |
3128 | if (skdev->state == SKD_DRVR_STATE_RESTARTING) | |
3129 | skd_recover_requests(skdev, 0); | |
3130 | if (skdev->state == SKD_DRVR_STATE_WAIT_BOOT) { | |
3131 | skdev->timer_countdown = SKD_STARTING_TIMO; | |
3132 | skdev->state = SKD_DRVR_STATE_STARTING; | |
3133 | skd_soft_reset(skdev); | |
3134 | break; | |
3135 | } | |
3136 | mtd = FIT_MXD_CONS(FIT_MTD_FITFW_INIT, 0, 0); | |
3137 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3138 | skdev->last_mtd = mtd; | |
3139 | break; | |
3140 | ||
3141 | case FIT_SR_DRIVE_ONLINE: | |
3142 | skdev->cur_max_queue_depth = skd_max_queue_depth; | |
3143 | if (skdev->cur_max_queue_depth > skdev->dev_max_queue_depth) | |
3144 | skdev->cur_max_queue_depth = skdev->dev_max_queue_depth; | |
3145 | ||
3146 | skdev->queue_low_water_mark = | |
3147 | skdev->cur_max_queue_depth * 2 / 3 + 1; | |
3148 | if (skdev->queue_low_water_mark < 1) | |
3149 | skdev->queue_low_water_mark = 1; | |
3150 | pr_info( | |
3151 | "(%s): Queue depth limit=%d dev=%d lowat=%d\n", | |
3152 | skd_name(skdev), | |
3153 | skdev->cur_max_queue_depth, | |
3154 | skdev->dev_max_queue_depth, skdev->queue_low_water_mark); | |
3155 | ||
3156 | skd_refresh_device_data(skdev); | |
3157 | break; | |
3158 | ||
3159 | case FIT_SR_DRIVE_BUSY: | |
3160 | skdev->state = SKD_DRVR_STATE_BUSY; | |
3161 | skdev->timer_countdown = SKD_BUSY_TIMO; | |
3162 | skd_quiesce_dev(skdev); | |
3163 | break; | |
3164 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
3165 | /* set timer for 3 seconds, we'll abort any unfinished | |
3166 | * commands after that expires | |
3167 | */ | |
3168 | skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; | |
3169 | skdev->timer_countdown = SKD_TIMER_SECONDS(3); | |
6a5ec65b | 3170 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3171 | break; |
3172 | case FIT_SR_DRIVE_BUSY_ERASE: | |
3173 | skdev->state = SKD_DRVR_STATE_BUSY_ERASE; | |
3174 | skdev->timer_countdown = SKD_BUSY_TIMO; | |
3175 | break; | |
3176 | case FIT_SR_DRIVE_OFFLINE: | |
3177 | skdev->state = SKD_DRVR_STATE_IDLE; | |
3178 | break; | |
3179 | case FIT_SR_DRIVE_SOFT_RESET: | |
3180 | switch (skdev->state) { | |
3181 | case SKD_DRVR_STATE_STARTING: | |
3182 | case SKD_DRVR_STATE_RESTARTING: | |
3183 | /* Expected by a caller of skd_soft_reset() */ | |
3184 | break; | |
3185 | default: | |
3186 | skdev->state = SKD_DRVR_STATE_RESTARTING; | |
3187 | break; | |
3188 | } | |
3189 | break; | |
3190 | case FIT_SR_DRIVE_FW_BOOTING: | |
2e44b427 | 3191 | pr_debug("%s:%s:%d ISR FIT_SR_DRIVE_FW_BOOTING %s\n", |
3192 | skdev->name, __func__, __LINE__, skdev->name); | |
e67f86b3 AB |
3193 | skdev->state = SKD_DRVR_STATE_WAIT_BOOT; |
3194 | skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; | |
3195 | break; | |
3196 | ||
3197 | case FIT_SR_DRIVE_DEGRADED: | |
3198 | case FIT_SR_PCIE_LINK_DOWN: | |
3199 | case FIT_SR_DRIVE_NEED_FW_DOWNLOAD: | |
3200 | break; | |
3201 | ||
3202 | case FIT_SR_DRIVE_FAULT: | |
3203 | skd_drive_fault(skdev); | |
3204 | skd_recover_requests(skdev, 0); | |
6a5ec65b | 3205 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3206 | break; |
3207 | ||
3208 | /* PCIe bus returned all Fs? */ | |
3209 | case 0xFF: | |
3210 | pr_info("(%s): state=0x%x sense=0x%x\n", | |
3211 | skd_name(skdev), state, sense); | |
3212 | skd_drive_disappeared(skdev); | |
3213 | skd_recover_requests(skdev, 0); | |
6a5ec65b | 3214 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3215 | break; |
3216 | default: | |
3217 | /* | |
3218 | * Uknown FW State. Wait for a state we recognize. | |
3219 | */ | |
3220 | break; | |
3221 | } | |
3222 | pr_err("(%s): Driver state %s(%d)=>%s(%d)\n", | |
3223 | skd_name(skdev), | |
3224 | skd_skdev_state_to_str(prev_driver_state), prev_driver_state, | |
3225 | skd_skdev_state_to_str(skdev->state), skdev->state); | |
3226 | } | |
3227 | ||
3228 | static void skd_recover_requests(struct skd_device *skdev, int requeue) | |
3229 | { | |
3230 | int i; | |
3231 | ||
3232 | for (i = 0; i < skdev->num_req_context; i++) { | |
3233 | struct skd_request_context *skreq = &skdev->skreq_table[i]; | |
3234 | ||
3235 | if (skreq->state == SKD_REQ_STATE_BUSY) { | |
3236 | skd_log_skreq(skdev, skreq, "recover"); | |
3237 | ||
3238 | SKD_ASSERT((skreq->id & SKD_ID_INCR) != 0); | |
fcd37eb3 | 3239 | SKD_ASSERT(skreq->req != NULL); |
e67f86b3 AB |
3240 | |
3241 | /* Release DMA resources for the request. */ | |
3242 | if (skreq->n_sg > 0) | |
3243 | skd_postop_sg_list(skdev, skreq); | |
3244 | ||
fcd37eb3 JA |
3245 | if (requeue && |
3246 | (unsigned long) ++skreq->req->special < | |
3247 | SKD_MAX_RETRIES) | |
38d4a1bb | 3248 | blk_requeue_request(skdev->queue, skreq->req); |
fcd37eb3 | 3249 | else |
e67f86b3 AB |
3250 | skd_end_request(skdev, skreq, -EIO); |
3251 | ||
fcd37eb3 | 3252 | skreq->req = NULL; |
e67f86b3 AB |
3253 | |
3254 | skreq->state = SKD_REQ_STATE_IDLE; | |
3255 | skreq->id += SKD_ID_INCR; | |
e67f86b3 AB |
3256 | } |
3257 | if (i > 0) | |
3258 | skreq[-1].next = skreq; | |
3259 | skreq->next = NULL; | |
3260 | } | |
3261 | skdev->skreq_free_list = skdev->skreq_table; | |
3262 | ||
3263 | for (i = 0; i < skdev->num_fitmsg_context; i++) { | |
3264 | struct skd_fitmsg_context *skmsg = &skdev->skmsg_table[i]; | |
3265 | ||
3266 | if (skmsg->state == SKD_MSG_STATE_BUSY) { | |
3267 | skd_log_skmsg(skdev, skmsg, "salvaged"); | |
3268 | SKD_ASSERT((skmsg->id & SKD_ID_INCR) != 0); | |
3269 | skmsg->state = SKD_MSG_STATE_IDLE; | |
3270 | skmsg->id += SKD_ID_INCR; | |
3271 | } | |
3272 | if (i > 0) | |
3273 | skmsg[-1].next = skmsg; | |
3274 | skmsg->next = NULL; | |
3275 | } | |
3276 | skdev->skmsg_free_list = skdev->skmsg_table; | |
3277 | ||
3278 | for (i = 0; i < skdev->n_special; i++) { | |
3279 | struct skd_special_context *skspcl = &skdev->skspcl_table[i]; | |
3280 | ||
3281 | /* If orphaned, reclaim it because it has already been reported | |
3282 | * to the process as an error (it was just waiting for | |
3283 | * a completion that didn't come, and now it will never come) | |
3284 | * If busy, change to a state that will cause it to error | |
3285 | * out in the wait routine and let it do the normal | |
3286 | * reporting and reclaiming | |
3287 | */ | |
3288 | if (skspcl->req.state == SKD_REQ_STATE_BUSY) { | |
3289 | if (skspcl->orphaned) { | |
2e44b427 | 3290 | pr_debug("%s:%s:%d orphaned %p\n", |
3291 | skdev->name, __func__, __LINE__, | |
3292 | skspcl); | |
e67f86b3 AB |
3293 | skd_release_special(skdev, skspcl); |
3294 | } else { | |
2e44b427 | 3295 | pr_debug("%s:%s:%d not orphaned %p\n", |
3296 | skdev->name, __func__, __LINE__, | |
3297 | skspcl); | |
e67f86b3 AB |
3298 | skspcl->req.state = SKD_REQ_STATE_ABORTED; |
3299 | } | |
3300 | } | |
3301 | } | |
3302 | skdev->skspcl_free_list = skdev->skspcl_table; | |
3303 | ||
3304 | for (i = 0; i < SKD_N_TIMEOUT_SLOT; i++) | |
3305 | skdev->timeout_slot[i] = 0; | |
3306 | ||
3307 | skdev->in_flight = 0; | |
3308 | } | |
3309 | ||
3310 | static void skd_isr_msg_from_dev(struct skd_device *skdev) | |
3311 | { | |
3312 | u32 mfd; | |
3313 | u32 mtd; | |
3314 | u32 data; | |
3315 | ||
3316 | mfd = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); | |
3317 | ||
2e44b427 | 3318 | pr_debug("%s:%s:%d mfd=0x%x last_mtd=0x%x\n", |
3319 | skdev->name, __func__, __LINE__, mfd, skdev->last_mtd); | |
e67f86b3 AB |
3320 | |
3321 | /* ignore any mtd that is an ack for something we didn't send */ | |
3322 | if (FIT_MXD_TYPE(mfd) != FIT_MXD_TYPE(skdev->last_mtd)) | |
3323 | return; | |
3324 | ||
3325 | switch (FIT_MXD_TYPE(mfd)) { | |
3326 | case FIT_MTD_FITFW_INIT: | |
3327 | skdev->proto_ver = FIT_PROTOCOL_MAJOR_VER(mfd); | |
3328 | ||
3329 | if (skdev->proto_ver != FIT_PROTOCOL_VERSION_1) { | |
3330 | pr_err("(%s): protocol mismatch\n", | |
3331 | skdev->name); | |
3332 | pr_err("(%s): got=%d support=%d\n", | |
3333 | skdev->name, skdev->proto_ver, | |
3334 | FIT_PROTOCOL_VERSION_1); | |
3335 | pr_err("(%s): please upgrade driver\n", | |
3336 | skdev->name); | |
3337 | skdev->state = SKD_DRVR_STATE_PROTOCOL_MISMATCH; | |
3338 | skd_soft_reset(skdev); | |
3339 | break; | |
3340 | } | |
3341 | mtd = FIT_MXD_CONS(FIT_MTD_GET_CMDQ_DEPTH, 0, 0); | |
3342 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3343 | skdev->last_mtd = mtd; | |
3344 | break; | |
3345 | ||
3346 | case FIT_MTD_GET_CMDQ_DEPTH: | |
3347 | skdev->dev_max_queue_depth = FIT_MXD_DATA(mfd); | |
3348 | mtd = FIT_MXD_CONS(FIT_MTD_SET_COMPQ_DEPTH, 0, | |
3349 | SKD_N_COMPLETION_ENTRY); | |
3350 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3351 | skdev->last_mtd = mtd; | |
3352 | break; | |
3353 | ||
3354 | case FIT_MTD_SET_COMPQ_DEPTH: | |
3355 | SKD_WRITEQ(skdev, skdev->cq_dma_address, FIT_MSG_TO_DEVICE_ARG); | |
3356 | mtd = FIT_MXD_CONS(FIT_MTD_SET_COMPQ_ADDR, 0, 0); | |
3357 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3358 | skdev->last_mtd = mtd; | |
3359 | break; | |
3360 | ||
3361 | case FIT_MTD_SET_COMPQ_ADDR: | |
3362 | skd_reset_skcomp(skdev); | |
3363 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_HOST_ID, 0, skdev->devno); | |
3364 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3365 | skdev->last_mtd = mtd; | |
3366 | break; | |
3367 | ||
3368 | case FIT_MTD_CMD_LOG_HOST_ID: | |
3369 | skdev->connect_time_stamp = get_seconds(); | |
3370 | data = skdev->connect_time_stamp & 0xFFFF; | |
3371 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_LO, 0, data); | |
3372 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3373 | skdev->last_mtd = mtd; | |
3374 | break; | |
3375 | ||
3376 | case FIT_MTD_CMD_LOG_TIME_STAMP_LO: | |
3377 | skdev->drive_jiffies = FIT_MXD_DATA(mfd); | |
3378 | data = (skdev->connect_time_stamp >> 16) & 0xFFFF; | |
3379 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_HI, 0, data); | |
3380 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3381 | skdev->last_mtd = mtd; | |
3382 | break; | |
3383 | ||
3384 | case FIT_MTD_CMD_LOG_TIME_STAMP_HI: | |
3385 | skdev->drive_jiffies |= (FIT_MXD_DATA(mfd) << 16); | |
3386 | mtd = FIT_MXD_CONS(FIT_MTD_ARM_QUEUE, 0, 0); | |
3387 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3388 | skdev->last_mtd = mtd; | |
3389 | ||
3390 | pr_err("(%s): Time sync driver=0x%x device=0x%x\n", | |
3391 | skd_name(skdev), | |
3392 | skdev->connect_time_stamp, skdev->drive_jiffies); | |
3393 | break; | |
3394 | ||
3395 | case FIT_MTD_ARM_QUEUE: | |
3396 | skdev->last_mtd = 0; | |
3397 | /* | |
3398 | * State should be, or soon will be, FIT_SR_DRIVE_ONLINE. | |
3399 | */ | |
3400 | break; | |
3401 | ||
3402 | default: | |
3403 | break; | |
3404 | } | |
3405 | } | |
3406 | ||
3407 | static void skd_disable_interrupts(struct skd_device *skdev) | |
3408 | { | |
3409 | u32 sense; | |
3410 | ||
3411 | sense = SKD_READL(skdev, FIT_CONTROL); | |
3412 | sense &= ~FIT_CR_ENABLE_INTERRUPTS; | |
3413 | SKD_WRITEL(skdev, sense, FIT_CONTROL); | |
2e44b427 | 3414 | pr_debug("%s:%s:%d sense 0x%x\n", |
3415 | skdev->name, __func__, __LINE__, sense); | |
e67f86b3 AB |
3416 | |
3417 | /* Note that the 1s is written. A 1-bit means | |
3418 | * disable, a 0 means enable. | |
3419 | */ | |
3420 | SKD_WRITEL(skdev, ~0, FIT_INT_MASK_HOST); | |
3421 | } | |
3422 | ||
3423 | static void skd_enable_interrupts(struct skd_device *skdev) | |
3424 | { | |
3425 | u32 val; | |
3426 | ||
3427 | /* unmask interrupts first */ | |
3428 | val = FIT_ISH_FW_STATE_CHANGE + | |
3429 | FIT_ISH_COMPLETION_POSTED + FIT_ISH_MSG_FROM_DEV; | |
3430 | ||
3431 | /* Note that the compliment of mask is written. A 1-bit means | |
3432 | * disable, a 0 means enable. */ | |
3433 | SKD_WRITEL(skdev, ~val, FIT_INT_MASK_HOST); | |
2e44b427 | 3434 | pr_debug("%s:%s:%d interrupt mask=0x%x\n", |
3435 | skdev->name, __func__, __LINE__, ~val); | |
e67f86b3 AB |
3436 | |
3437 | val = SKD_READL(skdev, FIT_CONTROL); | |
3438 | val |= FIT_CR_ENABLE_INTERRUPTS; | |
2e44b427 | 3439 | pr_debug("%s:%s:%d control=0x%x\n", |
3440 | skdev->name, __func__, __LINE__, val); | |
e67f86b3 AB |
3441 | SKD_WRITEL(skdev, val, FIT_CONTROL); |
3442 | } | |
3443 | ||
3444 | /* | |
3445 | ***************************************************************************** | |
3446 | * START, STOP, RESTART, QUIESCE, UNQUIESCE | |
3447 | ***************************************************************************** | |
3448 | */ | |
3449 | ||
3450 | static void skd_soft_reset(struct skd_device *skdev) | |
3451 | { | |
3452 | u32 val; | |
3453 | ||
3454 | val = SKD_READL(skdev, FIT_CONTROL); | |
3455 | val |= (FIT_CR_SOFT_RESET); | |
2e44b427 | 3456 | pr_debug("%s:%s:%d control=0x%x\n", |
3457 | skdev->name, __func__, __LINE__, val); | |
e67f86b3 AB |
3458 | SKD_WRITEL(skdev, val, FIT_CONTROL); |
3459 | } | |
3460 | ||
3461 | static void skd_start_device(struct skd_device *skdev) | |
3462 | { | |
3463 | unsigned long flags; | |
3464 | u32 sense; | |
3465 | u32 state; | |
3466 | ||
3467 | spin_lock_irqsave(&skdev->lock, flags); | |
3468 | ||
3469 | /* ack all ghost interrupts */ | |
3470 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
3471 | ||
3472 | sense = SKD_READL(skdev, FIT_STATUS); | |
3473 | ||
2e44b427 | 3474 | pr_debug("%s:%s:%d initial status=0x%x\n", |
3475 | skdev->name, __func__, __LINE__, sense); | |
e67f86b3 AB |
3476 | |
3477 | state = sense & FIT_SR_DRIVE_STATE_MASK; | |
3478 | skdev->drive_state = state; | |
3479 | skdev->last_mtd = 0; | |
3480 | ||
3481 | skdev->state = SKD_DRVR_STATE_STARTING; | |
3482 | skdev->timer_countdown = SKD_STARTING_TIMO; | |
3483 | ||
3484 | skd_enable_interrupts(skdev); | |
3485 | ||
3486 | switch (skdev->drive_state) { | |
3487 | case FIT_SR_DRIVE_OFFLINE: | |
3488 | pr_err("(%s): Drive offline...\n", skd_name(skdev)); | |
3489 | break; | |
3490 | ||
3491 | case FIT_SR_DRIVE_FW_BOOTING: | |
2e44b427 | 3492 | pr_debug("%s:%s:%d FIT_SR_DRIVE_FW_BOOTING %s\n", |
3493 | skdev->name, __func__, __LINE__, skdev->name); | |
e67f86b3 AB |
3494 | skdev->state = SKD_DRVR_STATE_WAIT_BOOT; |
3495 | skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; | |
3496 | break; | |
3497 | ||
3498 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
3499 | pr_info("(%s): Start: BUSY_SANITIZE\n", | |
3500 | skd_name(skdev)); | |
3501 | skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; | |
3502 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
3503 | break; | |
3504 | ||
3505 | case FIT_SR_DRIVE_BUSY_ERASE: | |
3506 | pr_info("(%s): Start: BUSY_ERASE\n", skd_name(skdev)); | |
3507 | skdev->state = SKD_DRVR_STATE_BUSY_ERASE; | |
3508 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
3509 | break; | |
3510 | ||
3511 | case FIT_SR_DRIVE_INIT: | |
3512 | case FIT_SR_DRIVE_ONLINE: | |
3513 | skd_soft_reset(skdev); | |
3514 | break; | |
3515 | ||
3516 | case FIT_SR_DRIVE_BUSY: | |
3517 | pr_err("(%s): Drive Busy...\n", skd_name(skdev)); | |
3518 | skdev->state = SKD_DRVR_STATE_BUSY; | |
3519 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
3520 | break; | |
3521 | ||
3522 | case FIT_SR_DRIVE_SOFT_RESET: | |
3523 | pr_err("(%s) drive soft reset in prog\n", | |
3524 | skd_name(skdev)); | |
3525 | break; | |
3526 | ||
3527 | case FIT_SR_DRIVE_FAULT: | |
3528 | /* Fault state is bad...soft reset won't do it... | |
3529 | * Hard reset, maybe, but does it work on device? | |
3530 | * For now, just fault so the system doesn't hang. | |
3531 | */ | |
3532 | skd_drive_fault(skdev); | |
3533 | /*start the queue so we can respond with error to requests */ | |
2e44b427 | 3534 | pr_debug("%s:%s:%d starting %s queue\n", |
3535 | skdev->name, __func__, __LINE__, skdev->name); | |
6a5ec65b | 3536 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3537 | skdev->gendisk_on = -1; |
3538 | wake_up_interruptible(&skdev->waitq); | |
3539 | break; | |
3540 | ||
3541 | case 0xFF: | |
3542 | /* Most likely the device isn't there or isn't responding | |
3543 | * to the BAR1 addresses. */ | |
3544 | skd_drive_disappeared(skdev); | |
3545 | /*start the queue so we can respond with error to requests */ | |
2e44b427 | 3546 | pr_debug("%s:%s:%d starting %s queue to error-out reqs\n", |
3547 | skdev->name, __func__, __LINE__, skdev->name); | |
6a5ec65b | 3548 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3549 | skdev->gendisk_on = -1; |
3550 | wake_up_interruptible(&skdev->waitq); | |
3551 | break; | |
3552 | ||
3553 | default: | |
3554 | pr_err("(%s) Start: unknown state %x\n", | |
3555 | skd_name(skdev), skdev->drive_state); | |
3556 | break; | |
3557 | } | |
3558 | ||
3559 | state = SKD_READL(skdev, FIT_CONTROL); | |
2e44b427 | 3560 | pr_debug("%s:%s:%d FIT Control Status=0x%x\n", |
3561 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3562 | |
3563 | state = SKD_READL(skdev, FIT_INT_STATUS_HOST); | |
2e44b427 | 3564 | pr_debug("%s:%s:%d Intr Status=0x%x\n", |
3565 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3566 | |
3567 | state = SKD_READL(skdev, FIT_INT_MASK_HOST); | |
2e44b427 | 3568 | pr_debug("%s:%s:%d Intr Mask=0x%x\n", |
3569 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3570 | |
3571 | state = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); | |
2e44b427 | 3572 | pr_debug("%s:%s:%d Msg from Dev=0x%x\n", |
3573 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3574 | |
3575 | state = SKD_READL(skdev, FIT_HW_VERSION); | |
2e44b427 | 3576 | pr_debug("%s:%s:%d HW version=0x%x\n", |
3577 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3578 | |
3579 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3580 | } | |
3581 | ||
3582 | static void skd_stop_device(struct skd_device *skdev) | |
3583 | { | |
3584 | unsigned long flags; | |
3585 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
3586 | u32 dev_state; | |
3587 | int i; | |
3588 | ||
3589 | spin_lock_irqsave(&skdev->lock, flags); | |
3590 | ||
3591 | if (skdev->state != SKD_DRVR_STATE_ONLINE) { | |
3592 | pr_err("(%s): skd_stop_device not online no sync\n", | |
3593 | skd_name(skdev)); | |
3594 | goto stop_out; | |
3595 | } | |
3596 | ||
3597 | if (skspcl->req.state != SKD_REQ_STATE_IDLE) { | |
3598 | pr_err("(%s): skd_stop_device no special\n", | |
3599 | skd_name(skdev)); | |
3600 | goto stop_out; | |
3601 | } | |
3602 | ||
3603 | skdev->state = SKD_DRVR_STATE_SYNCING; | |
3604 | skdev->sync_done = 0; | |
3605 | ||
3606 | skd_send_internal_skspcl(skdev, skspcl, SYNCHRONIZE_CACHE); | |
3607 | ||
3608 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3609 | ||
3610 | wait_event_interruptible_timeout(skdev->waitq, | |
3611 | (skdev->sync_done), (10 * HZ)); | |
3612 | ||
3613 | spin_lock_irqsave(&skdev->lock, flags); | |
3614 | ||
3615 | switch (skdev->sync_done) { | |
3616 | case 0: | |
3617 | pr_err("(%s): skd_stop_device no sync\n", | |
3618 | skd_name(skdev)); | |
3619 | break; | |
3620 | case 1: | |
3621 | pr_err("(%s): skd_stop_device sync done\n", | |
3622 | skd_name(skdev)); | |
3623 | break; | |
3624 | default: | |
3625 | pr_err("(%s): skd_stop_device sync error\n", | |
3626 | skd_name(skdev)); | |
3627 | } | |
3628 | ||
3629 | stop_out: | |
3630 | skdev->state = SKD_DRVR_STATE_STOPPING; | |
3631 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3632 | ||
3633 | skd_kill_timer(skdev); | |
3634 | ||
3635 | spin_lock_irqsave(&skdev->lock, flags); | |
3636 | skd_disable_interrupts(skdev); | |
3637 | ||
3638 | /* ensure all ints on device are cleared */ | |
3639 | /* soft reset the device to unload with a clean slate */ | |
3640 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
3641 | SKD_WRITEL(skdev, FIT_CR_SOFT_RESET, FIT_CONTROL); | |
3642 | ||
3643 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3644 | ||
3645 | /* poll every 100ms, 1 second timeout */ | |
3646 | for (i = 0; i < 10; i++) { | |
3647 | dev_state = | |
3648 | SKD_READL(skdev, FIT_STATUS) & FIT_SR_DRIVE_STATE_MASK; | |
3649 | if (dev_state == FIT_SR_DRIVE_INIT) | |
3650 | break; | |
3651 | set_current_state(TASK_INTERRUPTIBLE); | |
3652 | schedule_timeout(msecs_to_jiffies(100)); | |
3653 | } | |
3654 | ||
3655 | if (dev_state != FIT_SR_DRIVE_INIT) | |
3656 | pr_err("(%s): skd_stop_device state error 0x%02x\n", | |
3657 | skd_name(skdev), dev_state); | |
3658 | } | |
3659 | ||
3660 | /* assume spinlock is held */ | |
3661 | static void skd_restart_device(struct skd_device *skdev) | |
3662 | { | |
3663 | u32 state; | |
3664 | ||
3665 | /* ack all ghost interrupts */ | |
3666 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
3667 | ||
3668 | state = SKD_READL(skdev, FIT_STATUS); | |
3669 | ||
2e44b427 | 3670 | pr_debug("%s:%s:%d drive status=0x%x\n", |
3671 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3672 | |
3673 | state &= FIT_SR_DRIVE_STATE_MASK; | |
3674 | skdev->drive_state = state; | |
3675 | skdev->last_mtd = 0; | |
3676 | ||
3677 | skdev->state = SKD_DRVR_STATE_RESTARTING; | |
3678 | skdev->timer_countdown = SKD_RESTARTING_TIMO; | |
3679 | ||
3680 | skd_soft_reset(skdev); | |
3681 | } | |
3682 | ||
3683 | /* assume spinlock is held */ | |
3684 | static int skd_quiesce_dev(struct skd_device *skdev) | |
3685 | { | |
3686 | int rc = 0; | |
3687 | ||
3688 | switch (skdev->state) { | |
3689 | case SKD_DRVR_STATE_BUSY: | |
3690 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
2e44b427 | 3691 | pr_debug("%s:%s:%d stopping %s queue\n", |
3692 | skdev->name, __func__, __LINE__, skdev->name); | |
6a5ec65b | 3693 | blk_stop_queue(skdev->queue); |
e67f86b3 AB |
3694 | break; |
3695 | case SKD_DRVR_STATE_ONLINE: | |
3696 | case SKD_DRVR_STATE_STOPPING: | |
3697 | case SKD_DRVR_STATE_SYNCING: | |
3698 | case SKD_DRVR_STATE_PAUSING: | |
3699 | case SKD_DRVR_STATE_PAUSED: | |
3700 | case SKD_DRVR_STATE_STARTING: | |
3701 | case SKD_DRVR_STATE_RESTARTING: | |
3702 | case SKD_DRVR_STATE_RESUMING: | |
3703 | default: | |
3704 | rc = -EINVAL; | |
2e44b427 | 3705 | pr_debug("%s:%s:%d state [%d] not implemented\n", |
3706 | skdev->name, __func__, __LINE__, skdev->state); | |
e67f86b3 AB |
3707 | } |
3708 | return rc; | |
3709 | } | |
3710 | ||
3711 | /* assume spinlock is held */ | |
3712 | static int skd_unquiesce_dev(struct skd_device *skdev) | |
3713 | { | |
3714 | int prev_driver_state = skdev->state; | |
3715 | ||
3716 | skd_log_skdev(skdev, "unquiesce"); | |
3717 | if (skdev->state == SKD_DRVR_STATE_ONLINE) { | |
2e44b427 | 3718 | pr_debug("%s:%s:%d **** device already ONLINE\n", |
3719 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
3720 | return 0; |
3721 | } | |
3722 | if (skdev->drive_state != FIT_SR_DRIVE_ONLINE) { | |
3723 | /* | |
3724 | * If there has been an state change to other than | |
3725 | * ONLINE, we will rely on controller state change | |
3726 | * to come back online and restart the queue. | |
3727 | * The BUSY state means that driver is ready to | |
3728 | * continue normal processing but waiting for controller | |
3729 | * to become available. | |
3730 | */ | |
3731 | skdev->state = SKD_DRVR_STATE_BUSY; | |
2e44b427 | 3732 | pr_debug("%s:%s:%d drive BUSY state\n", |
3733 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
3734 | return 0; |
3735 | } | |
3736 | ||
3737 | /* | |
3738 | * Drive has just come online, driver is either in startup, | |
3739 | * paused performing a task, or bust waiting for hardware. | |
3740 | */ | |
3741 | switch (skdev->state) { | |
3742 | case SKD_DRVR_STATE_PAUSED: | |
3743 | case SKD_DRVR_STATE_BUSY: | |
3744 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
3745 | case SKD_DRVR_STATE_BUSY_ERASE: | |
3746 | case SKD_DRVR_STATE_STARTING: | |
3747 | case SKD_DRVR_STATE_RESTARTING: | |
3748 | case SKD_DRVR_STATE_FAULT: | |
3749 | case SKD_DRVR_STATE_IDLE: | |
3750 | case SKD_DRVR_STATE_LOAD: | |
3751 | skdev->state = SKD_DRVR_STATE_ONLINE; | |
3752 | pr_err("(%s): Driver state %s(%d)=>%s(%d)\n", | |
3753 | skd_name(skdev), | |
3754 | skd_skdev_state_to_str(prev_driver_state), | |
3755 | prev_driver_state, skd_skdev_state_to_str(skdev->state), | |
3756 | skdev->state); | |
2e44b427 | 3757 | pr_debug("%s:%s:%d **** device ONLINE...starting block queue\n", |
3758 | skdev->name, __func__, __LINE__); | |
3759 | pr_debug("%s:%s:%d starting %s queue\n", | |
3760 | skdev->name, __func__, __LINE__, skdev->name); | |
e67f86b3 | 3761 | pr_info("(%s): STEC s1120 ONLINE\n", skd_name(skdev)); |
6a5ec65b | 3762 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3763 | skdev->gendisk_on = 1; |
3764 | wake_up_interruptible(&skdev->waitq); | |
3765 | break; | |
3766 | ||
3767 | case SKD_DRVR_STATE_DISAPPEARED: | |
3768 | default: | |
2e44b427 | 3769 | pr_debug("%s:%s:%d **** driver state %d, not implemented \n", |
3770 | skdev->name, __func__, __LINE__, | |
3771 | skdev->state); | |
e67f86b3 AB |
3772 | return -EBUSY; |
3773 | } | |
3774 | return 0; | |
3775 | } | |
3776 | ||
3777 | /* | |
3778 | ***************************************************************************** | |
3779 | * PCIe MSI/MSI-X INTERRUPT HANDLERS | |
3780 | ***************************************************************************** | |
3781 | */ | |
3782 | ||
3783 | static irqreturn_t skd_reserved_isr(int irq, void *skd_host_data) | |
3784 | { | |
3785 | struct skd_device *skdev = skd_host_data; | |
3786 | unsigned long flags; | |
3787 | ||
3788 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3789 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3790 | skdev->name, __func__, __LINE__, | |
3791 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3792 | pr_err("(%s): MSIX reserved irq %d = 0x%x\n", skd_name(skdev), |
3793 | irq, SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
3794 | SKD_WRITEL(skdev, FIT_INT_RESERVED_MASK, FIT_INT_STATUS_HOST); | |
3795 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3796 | return IRQ_HANDLED; | |
3797 | } | |
3798 | ||
3799 | static irqreturn_t skd_statec_isr(int irq, void *skd_host_data) | |
3800 | { | |
3801 | struct skd_device *skdev = skd_host_data; | |
3802 | unsigned long flags; | |
3803 | ||
3804 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3805 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3806 | skdev->name, __func__, __LINE__, | |
3807 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3808 | SKD_WRITEL(skdev, FIT_ISH_FW_STATE_CHANGE, FIT_INT_STATUS_HOST); |
3809 | skd_isr_fwstate(skdev); | |
3810 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3811 | return IRQ_HANDLED; | |
3812 | } | |
3813 | ||
3814 | static irqreturn_t skd_comp_q(int irq, void *skd_host_data) | |
3815 | { | |
3816 | struct skd_device *skdev = skd_host_data; | |
3817 | unsigned long flags; | |
3818 | int flush_enqueued = 0; | |
3819 | int deferred; | |
3820 | ||
3821 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3822 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3823 | skdev->name, __func__, __LINE__, | |
3824 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3825 | SKD_WRITEL(skdev, FIT_ISH_COMPLETION_POSTED, FIT_INT_STATUS_HOST); |
3826 | deferred = skd_isr_completion_posted(skdev, skd_isr_comp_limit, | |
3827 | &flush_enqueued); | |
e67f86b3 AB |
3828 | if (flush_enqueued) |
3829 | skd_request_fn(skdev->queue); | |
3830 | ||
3831 | if (deferred) | |
3832 | schedule_work(&skdev->completion_worker); | |
3833 | else if (!flush_enqueued) | |
3834 | skd_request_fn(skdev->queue); | |
3835 | ||
3836 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3837 | ||
3838 | return IRQ_HANDLED; | |
3839 | } | |
3840 | ||
3841 | static irqreturn_t skd_msg_isr(int irq, void *skd_host_data) | |
3842 | { | |
3843 | struct skd_device *skdev = skd_host_data; | |
3844 | unsigned long flags; | |
3845 | ||
3846 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3847 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3848 | skdev->name, __func__, __LINE__, | |
3849 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3850 | SKD_WRITEL(skdev, FIT_ISH_MSG_FROM_DEV, FIT_INT_STATUS_HOST); |
3851 | skd_isr_msg_from_dev(skdev); | |
3852 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3853 | return IRQ_HANDLED; | |
3854 | } | |
3855 | ||
3856 | static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data) | |
3857 | { | |
3858 | struct skd_device *skdev = skd_host_data; | |
3859 | unsigned long flags; | |
3860 | ||
3861 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3862 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3863 | skdev->name, __func__, __LINE__, | |
3864 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3865 | SKD_WRITEL(skdev, FIT_INT_QUEUE_FULL, FIT_INT_STATUS_HOST); |
3866 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3867 | return IRQ_HANDLED; | |
3868 | } | |
3869 | ||
3870 | /* | |
3871 | ***************************************************************************** | |
3872 | * PCIe MSI/MSI-X SETUP | |
3873 | ***************************************************************************** | |
3874 | */ | |
3875 | ||
3876 | struct skd_msix_entry { | |
3877 | int have_irq; | |
3878 | u32 vector; | |
3879 | u32 entry; | |
3880 | struct skd_device *rsp; | |
3881 | char isr_name[30]; | |
3882 | }; | |
3883 | ||
3884 | struct skd_init_msix_entry { | |
3885 | const char *name; | |
3886 | irq_handler_t handler; | |
3887 | }; | |
3888 | ||
3889 | #define SKD_MAX_MSIX_COUNT 13 | |
3890 | #define SKD_MIN_MSIX_COUNT 7 | |
3891 | #define SKD_BASE_MSIX_IRQ 4 | |
3892 | ||
3893 | static struct skd_init_msix_entry msix_entries[SKD_MAX_MSIX_COUNT] = { | |
3894 | { "(DMA 0)", skd_reserved_isr }, | |
3895 | { "(DMA 1)", skd_reserved_isr }, | |
3896 | { "(DMA 2)", skd_reserved_isr }, | |
3897 | { "(DMA 3)", skd_reserved_isr }, | |
3898 | { "(State Change)", skd_statec_isr }, | |
3899 | { "(COMPL_Q)", skd_comp_q }, | |
3900 | { "(MSG)", skd_msg_isr }, | |
3901 | { "(Reserved)", skd_reserved_isr }, | |
3902 | { "(Reserved)", skd_reserved_isr }, | |
3903 | { "(Queue Full 0)", skd_qfull_isr }, | |
3904 | { "(Queue Full 1)", skd_qfull_isr }, | |
3905 | { "(Queue Full 2)", skd_qfull_isr }, | |
3906 | { "(Queue Full 3)", skd_qfull_isr }, | |
3907 | }; | |
3908 | ||
3909 | static void skd_release_msix(struct skd_device *skdev) | |
3910 | { | |
3911 | struct skd_msix_entry *qentry; | |
3912 | int i; | |
3913 | ||
3914 | if (skdev->msix_entries == NULL) | |
3915 | return; | |
3916 | for (i = 0; i < skdev->msix_count; i++) { | |
3917 | qentry = &skdev->msix_entries[i]; | |
3918 | skdev = qentry->rsp; | |
3919 | ||
3920 | if (qentry->have_irq) | |
3921 | devm_free_irq(&skdev->pdev->dev, | |
3922 | qentry->vector, qentry->rsp); | |
3923 | } | |
3924 | pci_disable_msix(skdev->pdev); | |
3925 | kfree(skdev->msix_entries); | |
3926 | skdev->msix_count = 0; | |
3927 | skdev->msix_entries = NULL; | |
3928 | } | |
3929 | ||
3930 | static int skd_acquire_msix(struct skd_device *skdev) | |
3931 | { | |
3932 | int i, rc; | |
3933 | struct pci_dev *pdev; | |
3934 | struct msix_entry *entries = NULL; | |
3935 | struct skd_msix_entry *qentry; | |
3936 | ||
3937 | pdev = skdev->pdev; | |
3938 | skdev->msix_count = SKD_MAX_MSIX_COUNT; | |
3939 | entries = kzalloc(sizeof(struct msix_entry) * SKD_MAX_MSIX_COUNT, | |
3940 | GFP_KERNEL); | |
3941 | if (!entries) | |
3942 | return -ENOMEM; | |
3943 | ||
3944 | for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) | |
3945 | entries[i].entry = i; | |
3946 | ||
3947 | rc = pci_enable_msix(pdev, entries, SKD_MAX_MSIX_COUNT); | |
3948 | if (rc < 0) | |
3949 | goto msix_out; | |
3950 | if (rc) { | |
3951 | if (rc < SKD_MIN_MSIX_COUNT) { | |
3952 | pr_err("(%s): failed to enable MSI-X %d\n", | |
3953 | skd_name(skdev), rc); | |
3954 | goto msix_out; | |
3955 | } | |
2e44b427 | 3956 | pr_debug("%s:%s:%d %s: <%s> allocated %d MSI-X vectors\n", |
3957 | skdev->name, __func__, __LINE__, | |
3958 | pci_name(pdev), skdev->name, rc); | |
e67f86b3 AB |
3959 | |
3960 | skdev->msix_count = rc; | |
3961 | rc = pci_enable_msix(pdev, entries, skdev->msix_count); | |
3962 | if (rc) { | |
3963 | pr_err("(%s): failed to enable MSI-X " | |
3964 | "support (%d) %d\n", | |
3965 | skd_name(skdev), skdev->msix_count, rc); | |
3966 | goto msix_out; | |
3967 | } | |
3968 | } | |
3969 | skdev->msix_entries = kzalloc(sizeof(struct skd_msix_entry) * | |
3970 | skdev->msix_count, GFP_KERNEL); | |
3971 | if (!skdev->msix_entries) { | |
3972 | rc = -ENOMEM; | |
3973 | skdev->msix_count = 0; | |
3974 | pr_err("(%s): msix table allocation error\n", | |
3975 | skd_name(skdev)); | |
3976 | goto msix_out; | |
3977 | } | |
3978 | ||
3979 | qentry = skdev->msix_entries; | |
3980 | for (i = 0; i < skdev->msix_count; i++) { | |
3981 | qentry->vector = entries[i].vector; | |
3982 | qentry->entry = entries[i].entry; | |
3983 | qentry->rsp = NULL; | |
3984 | qentry->have_irq = 0; | |
2e44b427 | 3985 | pr_debug("%s:%s:%d %s: <%s> msix (%d) vec %d, entry %x\n", |
3986 | skdev->name, __func__, __LINE__, | |
3987 | pci_name(pdev), skdev->name, | |
3988 | i, qentry->vector, qentry->entry); | |
e67f86b3 AB |
3989 | qentry++; |
3990 | } | |
3991 | ||
3992 | /* Enable MSI-X vectors for the base queue */ | |
3993 | for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { | |
3994 | qentry = &skdev->msix_entries[i]; | |
3995 | snprintf(qentry->isr_name, sizeof(qentry->isr_name), | |
3996 | "%s%d-msix %s", DRV_NAME, skdev->devno, | |
3997 | msix_entries[i].name); | |
3998 | rc = devm_request_irq(&skdev->pdev->dev, qentry->vector, | |
3999 | msix_entries[i].handler, 0, | |
4000 | qentry->isr_name, skdev); | |
4001 | if (rc) { | |
4002 | pr_err("(%s): Unable to register(%d) MSI-X " | |
4003 | "handler %d: %s\n", | |
4004 | skd_name(skdev), rc, i, qentry->isr_name); | |
4005 | goto msix_out; | |
4006 | } else { | |
4007 | qentry->have_irq = 1; | |
4008 | qentry->rsp = skdev; | |
4009 | } | |
4010 | } | |
2e44b427 | 4011 | pr_debug("%s:%s:%d %s: <%s> msix %d irq(s) enabled\n", |
4012 | skdev->name, __func__, __LINE__, | |
4013 | pci_name(pdev), skdev->name, skdev->msix_count); | |
e67f86b3 AB |
4014 | return 0; |
4015 | ||
4016 | msix_out: | |
4017 | if (entries) | |
4018 | kfree(entries); | |
4019 | skd_release_msix(skdev); | |
4020 | return rc; | |
4021 | } | |
4022 | ||
4023 | static int skd_acquire_irq(struct skd_device *skdev) | |
4024 | { | |
4025 | int rc; | |
4026 | struct pci_dev *pdev; | |
4027 | ||
4028 | pdev = skdev->pdev; | |
4029 | skdev->msix_count = 0; | |
4030 | ||
4031 | RETRY_IRQ_TYPE: | |
4032 | switch (skdev->irq_type) { | |
4033 | case SKD_IRQ_MSIX: | |
4034 | rc = skd_acquire_msix(skdev); | |
4035 | if (!rc) | |
4036 | pr_info("(%s): MSI-X %d irqs enabled\n", | |
4037 | skd_name(skdev), skdev->msix_count); | |
4038 | else { | |
4039 | pr_err( | |
4040 | "(%s): failed to enable MSI-X, re-trying with MSI %d\n", | |
4041 | skd_name(skdev), rc); | |
4042 | skdev->irq_type = SKD_IRQ_MSI; | |
4043 | goto RETRY_IRQ_TYPE; | |
4044 | } | |
4045 | break; | |
4046 | case SKD_IRQ_MSI: | |
4047 | snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d-msi", | |
4048 | DRV_NAME, skdev->devno); | |
4049 | rc = pci_enable_msi(pdev); | |
4050 | if (!rc) { | |
4051 | rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, 0, | |
4052 | skdev->isr_name, skdev); | |
4053 | if (rc) { | |
4054 | pci_disable_msi(pdev); | |
4055 | pr_err( | |
4056 | "(%s): failed to allocate the MSI interrupt %d\n", | |
4057 | skd_name(skdev), rc); | |
4058 | goto RETRY_IRQ_LEGACY; | |
4059 | } | |
4060 | pr_info("(%s): MSI irq %d enabled\n", | |
4061 | skd_name(skdev), pdev->irq); | |
4062 | } else { | |
4063 | RETRY_IRQ_LEGACY: | |
4064 | pr_err( | |
4065 | "(%s): failed to enable MSI, re-trying with LEGACY %d\n", | |
4066 | skd_name(skdev), rc); | |
4067 | skdev->irq_type = SKD_IRQ_LEGACY; | |
4068 | goto RETRY_IRQ_TYPE; | |
4069 | } | |
4070 | break; | |
4071 | case SKD_IRQ_LEGACY: | |
4072 | snprintf(skdev->isr_name, sizeof(skdev->isr_name), | |
4073 | "%s%d-legacy", DRV_NAME, skdev->devno); | |
4074 | rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, | |
4075 | IRQF_SHARED, skdev->isr_name, skdev); | |
4076 | if (!rc) | |
4077 | pr_info("(%s): LEGACY irq %d enabled\n", | |
4078 | skd_name(skdev), pdev->irq); | |
4079 | else | |
4080 | pr_err("(%s): request LEGACY irq error %d\n", | |
4081 | skd_name(skdev), rc); | |
4082 | break; | |
4083 | default: | |
4084 | pr_info("(%s): irq_type %d invalid, re-set to %d\n", | |
4085 | skd_name(skdev), skdev->irq_type, SKD_IRQ_DEFAULT); | |
4086 | skdev->irq_type = SKD_IRQ_LEGACY; | |
4087 | goto RETRY_IRQ_TYPE; | |
4088 | } | |
4089 | return rc; | |
4090 | } | |
4091 | ||
4092 | static void skd_release_irq(struct skd_device *skdev) | |
4093 | { | |
4094 | switch (skdev->irq_type) { | |
4095 | case SKD_IRQ_MSIX: | |
4096 | skd_release_msix(skdev); | |
4097 | break; | |
4098 | case SKD_IRQ_MSI: | |
4099 | devm_free_irq(&skdev->pdev->dev, skdev->pdev->irq, skdev); | |
4100 | pci_disable_msi(skdev->pdev); | |
4101 | break; | |
4102 | case SKD_IRQ_LEGACY: | |
4103 | devm_free_irq(&skdev->pdev->dev, skdev->pdev->irq, skdev); | |
4104 | break; | |
4105 | default: | |
4106 | pr_err("(%s): wrong irq type %d!", | |
4107 | skd_name(skdev), skdev->irq_type); | |
4108 | break; | |
4109 | } | |
4110 | } | |
4111 | ||
4112 | /* | |
4113 | ***************************************************************************** | |
4114 | * CONSTRUCT | |
4115 | ***************************************************************************** | |
4116 | */ | |
4117 | ||
4118 | static int skd_cons_skcomp(struct skd_device *skdev); | |
4119 | static int skd_cons_skmsg(struct skd_device *skdev); | |
4120 | static int skd_cons_skreq(struct skd_device *skdev); | |
4121 | static int skd_cons_skspcl(struct skd_device *skdev); | |
4122 | static int skd_cons_sksb(struct skd_device *skdev); | |
4123 | static struct fit_sg_descriptor *skd_cons_sg_list(struct skd_device *skdev, | |
4124 | u32 n_sg, | |
4125 | dma_addr_t *ret_dma_addr); | |
4126 | static int skd_cons_disk(struct skd_device *skdev); | |
4127 | ||
4128 | #define SKD_N_DEV_TABLE 16u | |
4129 | static u32 skd_next_devno; | |
4130 | ||
4131 | static struct skd_device *skd_construct(struct pci_dev *pdev) | |
4132 | { | |
4133 | struct skd_device *skdev; | |
4134 | int blk_major = skd_major; | |
4135 | int rc; | |
4136 | ||
4137 | skdev = kzalloc(sizeof(*skdev), GFP_KERNEL); | |
4138 | ||
4139 | if (!skdev) { | |
4140 | pr_err(PFX "(%s): memory alloc failure\n", | |
4141 | pci_name(pdev)); | |
4142 | return NULL; | |
4143 | } | |
4144 | ||
4145 | skdev->state = SKD_DRVR_STATE_LOAD; | |
4146 | skdev->pdev = pdev; | |
4147 | skdev->devno = skd_next_devno++; | |
4148 | skdev->major = blk_major; | |
4149 | skdev->irq_type = skd_isr_type; | |
4150 | sprintf(skdev->name, DRV_NAME "%d", skdev->devno); | |
4151 | skdev->dev_max_queue_depth = 0; | |
4152 | ||
4153 | skdev->num_req_context = skd_max_queue_depth; | |
4154 | skdev->num_fitmsg_context = skd_max_queue_depth; | |
4155 | skdev->n_special = skd_max_pass_thru; | |
4156 | skdev->cur_max_queue_depth = 1; | |
4157 | skdev->queue_low_water_mark = 1; | |
4158 | skdev->proto_ver = 99; | |
4159 | skdev->sgs_per_request = skd_sgs_per_request; | |
4160 | skdev->dbg_level = skd_dbg_level; | |
4161 | ||
e67f86b3 AB |
4162 | atomic_set(&skdev->device_count, 0); |
4163 | ||
4164 | spin_lock_init(&skdev->lock); | |
4165 | ||
4166 | INIT_WORK(&skdev->completion_worker, skd_completion_worker); | |
e67f86b3 | 4167 | |
2e44b427 | 4168 | pr_debug("%s:%s:%d skcomp\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4169 | rc = skd_cons_skcomp(skdev); |
4170 | if (rc < 0) | |
4171 | goto err_out; | |
4172 | ||
2e44b427 | 4173 | pr_debug("%s:%s:%d skmsg\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4174 | rc = skd_cons_skmsg(skdev); |
4175 | if (rc < 0) | |
4176 | goto err_out; | |
4177 | ||
2e44b427 | 4178 | pr_debug("%s:%s:%d skreq\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4179 | rc = skd_cons_skreq(skdev); |
4180 | if (rc < 0) | |
4181 | goto err_out; | |
4182 | ||
2e44b427 | 4183 | pr_debug("%s:%s:%d skspcl\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4184 | rc = skd_cons_skspcl(skdev); |
4185 | if (rc < 0) | |
4186 | goto err_out; | |
4187 | ||
2e44b427 | 4188 | pr_debug("%s:%s:%d sksb\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4189 | rc = skd_cons_sksb(skdev); |
4190 | if (rc < 0) | |
4191 | goto err_out; | |
4192 | ||
2e44b427 | 4193 | pr_debug("%s:%s:%d disk\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4194 | rc = skd_cons_disk(skdev); |
4195 | if (rc < 0) | |
4196 | goto err_out; | |
4197 | ||
2e44b427 | 4198 | pr_debug("%s:%s:%d VICTORY\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4199 | return skdev; |
4200 | ||
4201 | err_out: | |
2e44b427 | 4202 | pr_debug("%s:%s:%d construct failed\n", |
4203 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
4204 | skd_destruct(skdev); |
4205 | return NULL; | |
4206 | } | |
4207 | ||
4208 | static int skd_cons_skcomp(struct skd_device *skdev) | |
4209 | { | |
4210 | int rc = 0; | |
4211 | struct fit_completion_entry_v1 *skcomp; | |
4212 | u32 nbytes; | |
4213 | ||
4214 | nbytes = sizeof(*skcomp) * SKD_N_COMPLETION_ENTRY; | |
4215 | nbytes += sizeof(struct fit_comp_error_info) * SKD_N_COMPLETION_ENTRY; | |
4216 | ||
2e44b427 | 4217 | pr_debug("%s:%s:%d comp pci_alloc, total bytes %d entries %d\n", |
4218 | skdev->name, __func__, __LINE__, | |
4219 | nbytes, SKD_N_COMPLETION_ENTRY); | |
e67f86b3 AB |
4220 | |
4221 | skcomp = pci_alloc_consistent(skdev->pdev, nbytes, | |
4222 | &skdev->cq_dma_address); | |
4223 | ||
4224 | if (skcomp == NULL) { | |
4225 | rc = -ENOMEM; | |
4226 | goto err_out; | |
4227 | } | |
4228 | ||
4229 | memset(skcomp, 0, nbytes); | |
4230 | ||
4231 | skdev->skcomp_table = skcomp; | |
4232 | skdev->skerr_table = (struct fit_comp_error_info *)((char *)skcomp + | |
4233 | sizeof(*skcomp) * | |
4234 | SKD_N_COMPLETION_ENTRY); | |
4235 | ||
4236 | err_out: | |
4237 | return rc; | |
4238 | } | |
4239 | ||
4240 | static int skd_cons_skmsg(struct skd_device *skdev) | |
4241 | { | |
4242 | int rc = 0; | |
4243 | u32 i; | |
4244 | ||
2e44b427 | 4245 | pr_debug("%s:%s:%d skmsg_table kzalloc, struct %lu, count %u total %lu\n", |
4246 | skdev->name, __func__, __LINE__, | |
4247 | sizeof(struct skd_fitmsg_context), | |
4248 | skdev->num_fitmsg_context, | |
4249 | sizeof(struct skd_fitmsg_context) * skdev->num_fitmsg_context); | |
e67f86b3 AB |
4250 | |
4251 | skdev->skmsg_table = kzalloc(sizeof(struct skd_fitmsg_context) | |
4252 | *skdev->num_fitmsg_context, GFP_KERNEL); | |
4253 | if (skdev->skmsg_table == NULL) { | |
4254 | rc = -ENOMEM; | |
4255 | goto err_out; | |
4256 | } | |
4257 | ||
4258 | for (i = 0; i < skdev->num_fitmsg_context; i++) { | |
4259 | struct skd_fitmsg_context *skmsg; | |
4260 | ||
4261 | skmsg = &skdev->skmsg_table[i]; | |
4262 | ||
4263 | skmsg->id = i + SKD_ID_FIT_MSG; | |
4264 | ||
4265 | skmsg->state = SKD_MSG_STATE_IDLE; | |
4266 | skmsg->msg_buf = pci_alloc_consistent(skdev->pdev, | |
4267 | SKD_N_FITMSG_BYTES + 64, | |
4268 | &skmsg->mb_dma_address); | |
4269 | ||
4270 | if (skmsg->msg_buf == NULL) { | |
4271 | rc = -ENOMEM; | |
4272 | goto err_out; | |
4273 | } | |
4274 | ||
4275 | skmsg->offset = (u32)((u64)skmsg->msg_buf & | |
4276 | (~FIT_QCMD_BASE_ADDRESS_MASK)); | |
4277 | skmsg->msg_buf += ~FIT_QCMD_BASE_ADDRESS_MASK; | |
4278 | skmsg->msg_buf = (u8 *)((u64)skmsg->msg_buf & | |
4279 | FIT_QCMD_BASE_ADDRESS_MASK); | |
4280 | skmsg->mb_dma_address += ~FIT_QCMD_BASE_ADDRESS_MASK; | |
4281 | skmsg->mb_dma_address &= FIT_QCMD_BASE_ADDRESS_MASK; | |
4282 | memset(skmsg->msg_buf, 0, SKD_N_FITMSG_BYTES); | |
4283 | ||
4284 | skmsg->next = &skmsg[1]; | |
4285 | } | |
4286 | ||
4287 | /* Free list is in order starting with the 0th entry. */ | |
4288 | skdev->skmsg_table[i - 1].next = NULL; | |
4289 | skdev->skmsg_free_list = skdev->skmsg_table; | |
4290 | ||
4291 | err_out: | |
4292 | return rc; | |
4293 | } | |
4294 | ||
4295 | static int skd_cons_skreq(struct skd_device *skdev) | |
4296 | { | |
4297 | int rc = 0; | |
4298 | u32 i; | |
4299 | ||
2e44b427 | 4300 | pr_debug("%s:%s:%d skreq_table kzalloc, struct %lu, count %u total %lu\n", |
4301 | skdev->name, __func__, __LINE__, | |
4302 | sizeof(struct skd_request_context), | |
4303 | skdev->num_req_context, | |
4304 | sizeof(struct skd_request_context) * skdev->num_req_context); | |
e67f86b3 AB |
4305 | |
4306 | skdev->skreq_table = kzalloc(sizeof(struct skd_request_context) | |
4307 | * skdev->num_req_context, GFP_KERNEL); | |
4308 | if (skdev->skreq_table == NULL) { | |
4309 | rc = -ENOMEM; | |
4310 | goto err_out; | |
4311 | } | |
4312 | ||
2e44b427 | 4313 | pr_debug("%s:%s:%d alloc sg_table sg_per_req %u scatlist %lu total %lu\n", |
4314 | skdev->name, __func__, __LINE__, | |
4315 | skdev->sgs_per_request, sizeof(struct scatterlist), | |
4316 | skdev->sgs_per_request * sizeof(struct scatterlist)); | |
e67f86b3 AB |
4317 | |
4318 | for (i = 0; i < skdev->num_req_context; i++) { | |
4319 | struct skd_request_context *skreq; | |
4320 | ||
4321 | skreq = &skdev->skreq_table[i]; | |
4322 | ||
4323 | skreq->id = i + SKD_ID_RW_REQUEST; | |
4324 | skreq->state = SKD_REQ_STATE_IDLE; | |
4325 | ||
4326 | skreq->sg = kzalloc(sizeof(struct scatterlist) * | |
4327 | skdev->sgs_per_request, GFP_KERNEL); | |
4328 | if (skreq->sg == NULL) { | |
4329 | rc = -ENOMEM; | |
4330 | goto err_out; | |
4331 | } | |
4332 | sg_init_table(skreq->sg, skdev->sgs_per_request); | |
4333 | ||
4334 | skreq->sksg_list = skd_cons_sg_list(skdev, | |
4335 | skdev->sgs_per_request, | |
4336 | &skreq->sksg_dma_address); | |
4337 | ||
4338 | if (skreq->sksg_list == NULL) { | |
4339 | rc = -ENOMEM; | |
4340 | goto err_out; | |
4341 | } | |
4342 | ||
4343 | skreq->next = &skreq[1]; | |
4344 | } | |
4345 | ||
4346 | /* Free list is in order starting with the 0th entry. */ | |
4347 | skdev->skreq_table[i - 1].next = NULL; | |
4348 | skdev->skreq_free_list = skdev->skreq_table; | |
4349 | ||
4350 | err_out: | |
4351 | return rc; | |
4352 | } | |
4353 | ||
4354 | static int skd_cons_skspcl(struct skd_device *skdev) | |
4355 | { | |
4356 | int rc = 0; | |
4357 | u32 i, nbytes; | |
4358 | ||
2e44b427 | 4359 | pr_debug("%s:%s:%d skspcl_table kzalloc, struct %lu, count %u total %lu\n", |
4360 | skdev->name, __func__, __LINE__, | |
4361 | sizeof(struct skd_special_context), | |
4362 | skdev->n_special, | |
4363 | sizeof(struct skd_special_context) * skdev->n_special); | |
e67f86b3 AB |
4364 | |
4365 | skdev->skspcl_table = kzalloc(sizeof(struct skd_special_context) | |
4366 | * skdev->n_special, GFP_KERNEL); | |
4367 | if (skdev->skspcl_table == NULL) { | |
4368 | rc = -ENOMEM; | |
4369 | goto err_out; | |
4370 | } | |
4371 | ||
4372 | for (i = 0; i < skdev->n_special; i++) { | |
4373 | struct skd_special_context *skspcl; | |
4374 | ||
4375 | skspcl = &skdev->skspcl_table[i]; | |
4376 | ||
4377 | skspcl->req.id = i + SKD_ID_SPECIAL_REQUEST; | |
4378 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
4379 | ||
4380 | skspcl->req.next = &skspcl[1].req; | |
4381 | ||
4382 | nbytes = SKD_N_SPECIAL_FITMSG_BYTES; | |
4383 | ||
4384 | skspcl->msg_buf = pci_alloc_consistent(skdev->pdev, nbytes, | |
4385 | &skspcl->mb_dma_address); | |
4386 | if (skspcl->msg_buf == NULL) { | |
4387 | rc = -ENOMEM; | |
4388 | goto err_out; | |
4389 | } | |
4390 | ||
4391 | memset(skspcl->msg_buf, 0, nbytes); | |
4392 | ||
4393 | skspcl->req.sg = kzalloc(sizeof(struct scatterlist) * | |
4394 | SKD_N_SG_PER_SPECIAL, GFP_KERNEL); | |
4395 | if (skspcl->req.sg == NULL) { | |
4396 | rc = -ENOMEM; | |
4397 | goto err_out; | |
4398 | } | |
4399 | ||
4400 | skspcl->req.sksg_list = skd_cons_sg_list(skdev, | |
4401 | SKD_N_SG_PER_SPECIAL, | |
4402 | &skspcl->req. | |
4403 | sksg_dma_address); | |
4404 | if (skspcl->req.sksg_list == NULL) { | |
4405 | rc = -ENOMEM; | |
4406 | goto err_out; | |
4407 | } | |
4408 | } | |
4409 | ||
4410 | /* Free list is in order starting with the 0th entry. */ | |
4411 | skdev->skspcl_table[i - 1].req.next = NULL; | |
4412 | skdev->skspcl_free_list = skdev->skspcl_table; | |
4413 | ||
4414 | return rc; | |
4415 | ||
4416 | err_out: | |
4417 | return rc; | |
4418 | } | |
4419 | ||
4420 | static int skd_cons_sksb(struct skd_device *skdev) | |
4421 | { | |
4422 | int rc = 0; | |
4423 | struct skd_special_context *skspcl; | |
4424 | u32 nbytes; | |
4425 | ||
4426 | skspcl = &skdev->internal_skspcl; | |
4427 | ||
4428 | skspcl->req.id = 0 + SKD_ID_INTERNAL; | |
4429 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
4430 | ||
4431 | nbytes = SKD_N_INTERNAL_BYTES; | |
4432 | ||
4433 | skspcl->data_buf = pci_alloc_consistent(skdev->pdev, nbytes, | |
4434 | &skspcl->db_dma_address); | |
4435 | if (skspcl->data_buf == NULL) { | |
4436 | rc = -ENOMEM; | |
4437 | goto err_out; | |
4438 | } | |
4439 | ||
4440 | memset(skspcl->data_buf, 0, nbytes); | |
4441 | ||
4442 | nbytes = SKD_N_SPECIAL_FITMSG_BYTES; | |
4443 | skspcl->msg_buf = pci_alloc_consistent(skdev->pdev, nbytes, | |
4444 | &skspcl->mb_dma_address); | |
4445 | if (skspcl->msg_buf == NULL) { | |
4446 | rc = -ENOMEM; | |
4447 | goto err_out; | |
4448 | } | |
4449 | ||
4450 | memset(skspcl->msg_buf, 0, nbytes); | |
4451 | ||
4452 | skspcl->req.sksg_list = skd_cons_sg_list(skdev, 1, | |
4453 | &skspcl->req.sksg_dma_address); | |
4454 | if (skspcl->req.sksg_list == NULL) { | |
4455 | rc = -ENOMEM; | |
4456 | goto err_out; | |
4457 | } | |
4458 | ||
4459 | if (!skd_format_internal_skspcl(skdev)) { | |
4460 | rc = -EINVAL; | |
4461 | goto err_out; | |
4462 | } | |
4463 | ||
4464 | err_out: | |
4465 | return rc; | |
4466 | } | |
4467 | ||
4468 | static struct fit_sg_descriptor *skd_cons_sg_list(struct skd_device *skdev, | |
4469 | u32 n_sg, | |
4470 | dma_addr_t *ret_dma_addr) | |
4471 | { | |
4472 | struct fit_sg_descriptor *sg_list; | |
4473 | u32 nbytes; | |
4474 | ||
4475 | nbytes = sizeof(*sg_list) * n_sg; | |
4476 | ||
4477 | sg_list = pci_alloc_consistent(skdev->pdev, nbytes, ret_dma_addr); | |
4478 | ||
4479 | if (sg_list != NULL) { | |
4480 | uint64_t dma_address = *ret_dma_addr; | |
4481 | u32 i; | |
4482 | ||
4483 | memset(sg_list, 0, nbytes); | |
4484 | ||
4485 | for (i = 0; i < n_sg - 1; i++) { | |
4486 | uint64_t ndp_off; | |
4487 | ndp_off = (i + 1) * sizeof(struct fit_sg_descriptor); | |
4488 | ||
4489 | sg_list[i].next_desc_ptr = dma_address + ndp_off; | |
4490 | } | |
4491 | sg_list[i].next_desc_ptr = 0LL; | |
4492 | } | |
4493 | ||
4494 | return sg_list; | |
4495 | } | |
4496 | ||
4497 | static int skd_cons_disk(struct skd_device *skdev) | |
4498 | { | |
4499 | int rc = 0; | |
4500 | struct gendisk *disk; | |
4501 | struct request_queue *q; | |
4502 | unsigned long flags; | |
4503 | ||
4504 | disk = alloc_disk(SKD_MINORS_PER_DEVICE); | |
4505 | if (!disk) { | |
4506 | rc = -ENOMEM; | |
4507 | goto err_out; | |
4508 | } | |
4509 | ||
4510 | skdev->disk = disk; | |
4511 | sprintf(disk->disk_name, DRV_NAME "%u", skdev->devno); | |
4512 | ||
4513 | disk->major = skdev->major; | |
4514 | disk->first_minor = skdev->devno * SKD_MINORS_PER_DEVICE; | |
4515 | disk->fops = &skd_blockdev_ops; | |
4516 | disk->private_data = skdev; | |
4517 | ||
fcd37eb3 | 4518 | q = blk_init_queue(skd_request_fn, &skdev->lock); |
e67f86b3 AB |
4519 | if (!q) { |
4520 | rc = -ENOMEM; | |
4521 | goto err_out; | |
4522 | } | |
4523 | ||
4524 | skdev->queue = q; | |
4525 | disk->queue = q; | |
4526 | q->queuedata = skdev; | |
4527 | ||
e67f86b3 AB |
4528 | blk_queue_flush(q, REQ_FLUSH | REQ_FUA); |
4529 | blk_queue_max_segments(q, skdev->sgs_per_request); | |
4530 | blk_queue_max_hw_sectors(q, SKD_N_MAX_SECTORS); | |
4531 | ||
4532 | /* set sysfs ptimal_io_size to 8K */ | |
4533 | blk_queue_io_opt(q, 8192); | |
4534 | ||
4535 | /* DISCARD Flag initialization. */ | |
4536 | q->limits.discard_granularity = 8192; | |
4537 | q->limits.discard_alignment = 0; | |
4538 | q->limits.max_discard_sectors = UINT_MAX >> 9; | |
4539 | q->limits.discard_zeroes_data = 1; | |
4540 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
4541 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); | |
4542 | ||
4543 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 4544 | pr_debug("%s:%s:%d stopping %s queue\n", |
4545 | skdev->name, __func__, __LINE__, skdev->name); | |
6a5ec65b | 4546 | blk_stop_queue(skdev->queue); |
e67f86b3 AB |
4547 | spin_unlock_irqrestore(&skdev->lock, flags); |
4548 | ||
4549 | err_out: | |
4550 | return rc; | |
4551 | } | |
4552 | ||
4553 | /* | |
4554 | ***************************************************************************** | |
4555 | * DESTRUCT (FREE) | |
4556 | ***************************************************************************** | |
4557 | */ | |
4558 | ||
4559 | static void skd_free_skcomp(struct skd_device *skdev); | |
4560 | static void skd_free_skmsg(struct skd_device *skdev); | |
4561 | static void skd_free_skreq(struct skd_device *skdev); | |
4562 | static void skd_free_skspcl(struct skd_device *skdev); | |
4563 | static void skd_free_sksb(struct skd_device *skdev); | |
4564 | static void skd_free_sg_list(struct skd_device *skdev, | |
4565 | struct fit_sg_descriptor *sg_list, | |
4566 | u32 n_sg, dma_addr_t dma_addr); | |
4567 | static void skd_free_disk(struct skd_device *skdev); | |
4568 | ||
4569 | static void skd_destruct(struct skd_device *skdev) | |
4570 | { | |
4571 | if (skdev == NULL) | |
4572 | return; | |
4573 | ||
4574 | ||
2e44b427 | 4575 | pr_debug("%s:%s:%d disk\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4576 | skd_free_disk(skdev); |
4577 | ||
2e44b427 | 4578 | pr_debug("%s:%s:%d sksb\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4579 | skd_free_sksb(skdev); |
4580 | ||
2e44b427 | 4581 | pr_debug("%s:%s:%d skspcl\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4582 | skd_free_skspcl(skdev); |
4583 | ||
2e44b427 | 4584 | pr_debug("%s:%s:%d skreq\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4585 | skd_free_skreq(skdev); |
4586 | ||
2e44b427 | 4587 | pr_debug("%s:%s:%d skmsg\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4588 | skd_free_skmsg(skdev); |
4589 | ||
2e44b427 | 4590 | pr_debug("%s:%s:%d skcomp\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4591 | skd_free_skcomp(skdev); |
4592 | ||
2e44b427 | 4593 | pr_debug("%s:%s:%d skdev\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4594 | kfree(skdev); |
4595 | } | |
4596 | ||
4597 | static void skd_free_skcomp(struct skd_device *skdev) | |
4598 | { | |
4599 | if (skdev->skcomp_table != NULL) { | |
4600 | u32 nbytes; | |
4601 | ||
4602 | nbytes = sizeof(skdev->skcomp_table[0]) * | |
4603 | SKD_N_COMPLETION_ENTRY; | |
4604 | pci_free_consistent(skdev->pdev, nbytes, | |
4605 | skdev->skcomp_table, skdev->cq_dma_address); | |
4606 | } | |
4607 | ||
4608 | skdev->skcomp_table = NULL; | |
4609 | skdev->cq_dma_address = 0; | |
4610 | } | |
4611 | ||
4612 | static void skd_free_skmsg(struct skd_device *skdev) | |
4613 | { | |
4614 | u32 i; | |
4615 | ||
4616 | if (skdev->skmsg_table == NULL) | |
4617 | return; | |
4618 | ||
4619 | for (i = 0; i < skdev->num_fitmsg_context; i++) { | |
4620 | struct skd_fitmsg_context *skmsg; | |
4621 | ||
4622 | skmsg = &skdev->skmsg_table[i]; | |
4623 | ||
4624 | if (skmsg->msg_buf != NULL) { | |
4625 | skmsg->msg_buf += skmsg->offset; | |
4626 | skmsg->mb_dma_address += skmsg->offset; | |
4627 | pci_free_consistent(skdev->pdev, SKD_N_FITMSG_BYTES, | |
4628 | skmsg->msg_buf, | |
4629 | skmsg->mb_dma_address); | |
4630 | } | |
4631 | skmsg->msg_buf = NULL; | |
4632 | skmsg->mb_dma_address = 0; | |
4633 | } | |
4634 | ||
4635 | kfree(skdev->skmsg_table); | |
4636 | skdev->skmsg_table = NULL; | |
4637 | } | |
4638 | ||
4639 | static void skd_free_skreq(struct skd_device *skdev) | |
4640 | { | |
4641 | u32 i; | |
4642 | ||
4643 | if (skdev->skreq_table == NULL) | |
4644 | return; | |
4645 | ||
4646 | for (i = 0; i < skdev->num_req_context; i++) { | |
4647 | struct skd_request_context *skreq; | |
4648 | ||
4649 | skreq = &skdev->skreq_table[i]; | |
4650 | ||
4651 | skd_free_sg_list(skdev, skreq->sksg_list, | |
4652 | skdev->sgs_per_request, | |
4653 | skreq->sksg_dma_address); | |
4654 | ||
4655 | skreq->sksg_list = NULL; | |
4656 | skreq->sksg_dma_address = 0; | |
4657 | ||
4658 | kfree(skreq->sg); | |
4659 | } | |
4660 | ||
4661 | kfree(skdev->skreq_table); | |
4662 | skdev->skreq_table = NULL; | |
4663 | } | |
4664 | ||
4665 | static void skd_free_skspcl(struct skd_device *skdev) | |
4666 | { | |
4667 | u32 i; | |
4668 | u32 nbytes; | |
4669 | ||
4670 | if (skdev->skspcl_table == NULL) | |
4671 | return; | |
4672 | ||
4673 | for (i = 0; i < skdev->n_special; i++) { | |
4674 | struct skd_special_context *skspcl; | |
4675 | ||
4676 | skspcl = &skdev->skspcl_table[i]; | |
4677 | ||
4678 | if (skspcl->msg_buf != NULL) { | |
4679 | nbytes = SKD_N_SPECIAL_FITMSG_BYTES; | |
4680 | pci_free_consistent(skdev->pdev, nbytes, | |
4681 | skspcl->msg_buf, | |
4682 | skspcl->mb_dma_address); | |
4683 | } | |
4684 | ||
4685 | skspcl->msg_buf = NULL; | |
4686 | skspcl->mb_dma_address = 0; | |
4687 | ||
4688 | skd_free_sg_list(skdev, skspcl->req.sksg_list, | |
4689 | SKD_N_SG_PER_SPECIAL, | |
4690 | skspcl->req.sksg_dma_address); | |
4691 | ||
4692 | skspcl->req.sksg_list = NULL; | |
4693 | skspcl->req.sksg_dma_address = 0; | |
4694 | ||
4695 | kfree(skspcl->req.sg); | |
4696 | } | |
4697 | ||
4698 | kfree(skdev->skspcl_table); | |
4699 | skdev->skspcl_table = NULL; | |
4700 | } | |
4701 | ||
4702 | static void skd_free_sksb(struct skd_device *skdev) | |
4703 | { | |
4704 | struct skd_special_context *skspcl; | |
4705 | u32 nbytes; | |
4706 | ||
4707 | skspcl = &skdev->internal_skspcl; | |
4708 | ||
4709 | if (skspcl->data_buf != NULL) { | |
4710 | nbytes = SKD_N_INTERNAL_BYTES; | |
4711 | ||
4712 | pci_free_consistent(skdev->pdev, nbytes, | |
4713 | skspcl->data_buf, skspcl->db_dma_address); | |
4714 | } | |
4715 | ||
4716 | skspcl->data_buf = NULL; | |
4717 | skspcl->db_dma_address = 0; | |
4718 | ||
4719 | if (skspcl->msg_buf != NULL) { | |
4720 | nbytes = SKD_N_SPECIAL_FITMSG_BYTES; | |
4721 | pci_free_consistent(skdev->pdev, nbytes, | |
4722 | skspcl->msg_buf, skspcl->mb_dma_address); | |
4723 | } | |
4724 | ||
4725 | skspcl->msg_buf = NULL; | |
4726 | skspcl->mb_dma_address = 0; | |
4727 | ||
4728 | skd_free_sg_list(skdev, skspcl->req.sksg_list, 1, | |
4729 | skspcl->req.sksg_dma_address); | |
4730 | ||
4731 | skspcl->req.sksg_list = NULL; | |
4732 | skspcl->req.sksg_dma_address = 0; | |
4733 | } | |
4734 | ||
4735 | static void skd_free_sg_list(struct skd_device *skdev, | |
4736 | struct fit_sg_descriptor *sg_list, | |
4737 | u32 n_sg, dma_addr_t dma_addr) | |
4738 | { | |
4739 | if (sg_list != NULL) { | |
4740 | u32 nbytes; | |
4741 | ||
4742 | nbytes = sizeof(*sg_list) * n_sg; | |
4743 | ||
4744 | pci_free_consistent(skdev->pdev, nbytes, sg_list, dma_addr); | |
4745 | } | |
4746 | } | |
4747 | ||
4748 | static void skd_free_disk(struct skd_device *skdev) | |
4749 | { | |
4750 | struct gendisk *disk = skdev->disk; | |
4751 | ||
4752 | if (disk != NULL) { | |
4753 | struct request_queue *q = disk->queue; | |
4754 | ||
4755 | if (disk->flags & GENHD_FL_UP) | |
4756 | del_gendisk(disk); | |
4757 | if (q) | |
4758 | blk_cleanup_queue(q); | |
4759 | put_disk(disk); | |
4760 | } | |
4761 | skdev->disk = NULL; | |
4762 | } | |
4763 | ||
4764 | ||
4765 | ||
4766 | /* | |
4767 | ***************************************************************************** | |
4768 | * BLOCK DEVICE (BDEV) GLUE | |
4769 | ***************************************************************************** | |
4770 | */ | |
4771 | ||
4772 | static int skd_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
4773 | { | |
4774 | struct skd_device *skdev; | |
4775 | u64 capacity; | |
4776 | ||
4777 | skdev = bdev->bd_disk->private_data; | |
4778 | ||
2e44b427 | 4779 | pr_debug("%s:%s:%d %s: CMD[%s] getgeo device\n", |
4780 | skdev->name, __func__, __LINE__, | |
4781 | bdev->bd_disk->disk_name, current->comm); | |
e67f86b3 AB |
4782 | |
4783 | if (skdev->read_cap_is_valid) { | |
4784 | capacity = get_capacity(skdev->disk); | |
4785 | geo->heads = 64; | |
4786 | geo->sectors = 255; | |
4787 | geo->cylinders = (capacity) / (255 * 64); | |
4788 | ||
4789 | return 0; | |
4790 | } | |
4791 | return -EIO; | |
4792 | } | |
4793 | ||
4794 | static int skd_bdev_attach(struct skd_device *skdev) | |
4795 | { | |
2e44b427 | 4796 | pr_debug("%s:%s:%d add_disk\n", skdev->name, __func__, __LINE__); |
e67f86b3 AB |
4797 | add_disk(skdev->disk); |
4798 | return 0; | |
4799 | } | |
4800 | ||
4801 | static const struct block_device_operations skd_blockdev_ops = { | |
4802 | .owner = THIS_MODULE, | |
4803 | .ioctl = skd_bdev_ioctl, | |
4804 | .getgeo = skd_bdev_getgeo, | |
4805 | }; | |
4806 | ||
4807 | ||
4808 | /* | |
4809 | ***************************************************************************** | |
4810 | * PCIe DRIVER GLUE | |
4811 | ***************************************************************************** | |
4812 | */ | |
4813 | ||
4814 | static DEFINE_PCI_DEVICE_TABLE(skd_pci_tbl) = { | |
4815 | { PCI_VENDOR_ID_STEC, PCI_DEVICE_ID_S1120, | |
4816 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, | |
4817 | { 0 } /* terminate list */ | |
4818 | }; | |
4819 | ||
4820 | MODULE_DEVICE_TABLE(pci, skd_pci_tbl); | |
4821 | ||
4822 | static char *skd_pci_info(struct skd_device *skdev, char *str) | |
4823 | { | |
4824 | int pcie_reg; | |
4825 | ||
4826 | strcpy(str, "PCIe ("); | |
4827 | pcie_reg = pci_find_capability(skdev->pdev, PCI_CAP_ID_EXP); | |
4828 | ||
4829 | if (pcie_reg) { | |
4830 | ||
4831 | char lwstr[6]; | |
4832 | uint16_t pcie_lstat, lspeed, lwidth; | |
4833 | ||
4834 | pcie_reg += 0x12; | |
4835 | pci_read_config_word(skdev->pdev, pcie_reg, &pcie_lstat); | |
4836 | lspeed = pcie_lstat & (0xF); | |
4837 | lwidth = (pcie_lstat & 0x3F0) >> 4; | |
4838 | ||
4839 | if (lspeed == 1) | |
4840 | strcat(str, "2.5GT/s "); | |
4841 | else if (lspeed == 2) | |
4842 | strcat(str, "5.0GT/s "); | |
4843 | else | |
4844 | strcat(str, "<unknown> "); | |
4845 | snprintf(lwstr, sizeof(lwstr), "%dX)", lwidth); | |
4846 | strcat(str, lwstr); | |
4847 | } | |
4848 | return str; | |
4849 | } | |
4850 | ||
4851 | static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
4852 | { | |
4853 | int i; | |
4854 | int rc = 0; | |
4855 | char pci_str[32]; | |
4856 | struct skd_device *skdev; | |
4857 | ||
4858 | pr_info("STEC s1120 Driver(%s) version %s-b%s\n", | |
4859 | DRV_NAME, DRV_VERSION, DRV_BUILD_ID); | |
4860 | pr_info("(skd?:??:[%s]): vendor=%04X device=%04x\n", | |
4861 | pci_name(pdev), pdev->vendor, pdev->device); | |
4862 | ||
4863 | rc = pci_enable_device(pdev); | |
4864 | if (rc) | |
4865 | return rc; | |
4866 | rc = pci_request_regions(pdev, DRV_NAME); | |
4867 | if (rc) | |
4868 | goto err_out; | |
4869 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); | |
4870 | if (!rc) { | |
4871 | if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { | |
4872 | ||
4873 | pr_err("(%s): consistent DMA mask error %d\n", | |
4874 | pci_name(pdev), rc); | |
4875 | } | |
4876 | } else { | |
4877 | (rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))); | |
4878 | if (rc) { | |
4879 | ||
4880 | pr_err("(%s): DMA mask error %d\n", | |
4881 | pci_name(pdev), rc); | |
4882 | goto err_out_regions; | |
4883 | } | |
4884 | } | |
4885 | ||
b8df6647 BZ |
4886 | if (!skd_major) { |
4887 | rc = register_blkdev(0, DRV_NAME); | |
4888 | if (rc < 0) | |
4889 | goto err_out_regions; | |
4890 | BUG_ON(!rc); | |
4891 | skd_major = rc; | |
4892 | } | |
4893 | ||
e67f86b3 | 4894 | skdev = skd_construct(pdev); |
1762b57f WY |
4895 | if (skdev == NULL) { |
4896 | rc = -ENOMEM; | |
e67f86b3 | 4897 | goto err_out_regions; |
1762b57f | 4898 | } |
e67f86b3 AB |
4899 | |
4900 | skd_pci_info(skdev, pci_str); | |
4901 | pr_info("(%s): %s 64bit\n", skd_name(skdev), pci_str); | |
4902 | ||
4903 | pci_set_master(pdev); | |
4904 | rc = pci_enable_pcie_error_reporting(pdev); | |
4905 | if (rc) { | |
4906 | pr_err( | |
4907 | "(%s): bad enable of PCIe error reporting rc=%d\n", | |
4908 | skd_name(skdev), rc); | |
4909 | skdev->pcie_error_reporting_is_enabled = 0; | |
4910 | } else | |
4911 | skdev->pcie_error_reporting_is_enabled = 1; | |
4912 | ||
4913 | ||
4914 | pci_set_drvdata(pdev, skdev); | |
ebedd16d | 4915 | |
e67f86b3 AB |
4916 | skdev->disk->driverfs_dev = &pdev->dev; |
4917 | ||
4918 | for (i = 0; i < SKD_MAX_BARS; i++) { | |
4919 | skdev->mem_phys[i] = pci_resource_start(pdev, i); | |
4920 | skdev->mem_size[i] = (u32)pci_resource_len(pdev, i); | |
4921 | skdev->mem_map[i] = ioremap(skdev->mem_phys[i], | |
4922 | skdev->mem_size[i]); | |
4923 | if (!skdev->mem_map[i]) { | |
4924 | pr_err("(%s): Unable to map adapter memory!\n", | |
4925 | skd_name(skdev)); | |
4926 | rc = -ENODEV; | |
4927 | goto err_out_iounmap; | |
4928 | } | |
2e44b427 | 4929 | pr_debug("%s:%s:%d mem_map=%p, phyd=%016llx, size=%d\n", |
4930 | skdev->name, __func__, __LINE__, | |
4931 | skdev->mem_map[i], | |
4932 | (uint64_t)skdev->mem_phys[i], skdev->mem_size[i]); | |
e67f86b3 AB |
4933 | } |
4934 | ||
4935 | rc = skd_acquire_irq(skdev); | |
4936 | if (rc) { | |
4937 | pr_err("(%s): interrupt resource error %d\n", | |
4938 | skd_name(skdev), rc); | |
4939 | goto err_out_iounmap; | |
4940 | } | |
4941 | ||
4942 | rc = skd_start_timer(skdev); | |
4943 | if (rc) | |
4944 | goto err_out_timer; | |
4945 | ||
4946 | init_waitqueue_head(&skdev->waitq); | |
4947 | ||
4948 | skd_start_device(skdev); | |
4949 | ||
4950 | rc = wait_event_interruptible_timeout(skdev->waitq, | |
4951 | (skdev->gendisk_on), | |
4952 | (SKD_START_WAIT_SECONDS * HZ)); | |
4953 | if (skdev->gendisk_on > 0) { | |
4954 | /* device came on-line after reset */ | |
4955 | skd_bdev_attach(skdev); | |
4956 | rc = 0; | |
4957 | } else { | |
4958 | /* we timed out, something is wrong with the device, | |
4959 | don't add the disk structure */ | |
4960 | pr_err( | |
4961 | "(%s): error: waiting for s1120 timed out %d!\n", | |
4962 | skd_name(skdev), rc); | |
4963 | /* in case of no error; we timeout with ENXIO */ | |
4964 | if (!rc) | |
4965 | rc = -ENXIO; | |
4966 | goto err_out_timer; | |
4967 | } | |
4968 | ||
4969 | ||
4970 | #ifdef SKD_VMK_POLL_HANDLER | |
4971 | if (skdev->irq_type == SKD_IRQ_MSIX) { | |
4972 | /* MSIX completion handler is being used for coredump */ | |
4973 | vmklnx_scsi_register_poll_handler(skdev->scsi_host, | |
4974 | skdev->msix_entries[5].vector, | |
4975 | skd_comp_q, skdev); | |
4976 | } else { | |
4977 | vmklnx_scsi_register_poll_handler(skdev->scsi_host, | |
4978 | skdev->pdev->irq, skd_isr, | |
4979 | skdev); | |
4980 | } | |
4981 | #endif /* SKD_VMK_POLL_HANDLER */ | |
4982 | ||
4983 | return rc; | |
4984 | ||
4985 | err_out_timer: | |
4986 | skd_stop_device(skdev); | |
4987 | skd_release_irq(skdev); | |
4988 | ||
4989 | err_out_iounmap: | |
4990 | for (i = 0; i < SKD_MAX_BARS; i++) | |
4991 | if (skdev->mem_map[i]) | |
4992 | iounmap(skdev->mem_map[i]); | |
4993 | ||
4994 | if (skdev->pcie_error_reporting_is_enabled) | |
4995 | pci_disable_pcie_error_reporting(pdev); | |
4996 | ||
4997 | skd_destruct(skdev); | |
4998 | ||
4999 | err_out_regions: | |
5000 | pci_release_regions(pdev); | |
5001 | ||
5002 | err_out: | |
5003 | pci_disable_device(pdev); | |
5004 | pci_set_drvdata(pdev, NULL); | |
5005 | return rc; | |
5006 | } | |
5007 | ||
5008 | static void skd_pci_remove(struct pci_dev *pdev) | |
5009 | { | |
5010 | int i; | |
5011 | struct skd_device *skdev; | |
5012 | ||
5013 | skdev = pci_get_drvdata(pdev); | |
5014 | if (!skdev) { | |
5015 | pr_err("%s: no device data for PCI\n", pci_name(pdev)); | |
5016 | return; | |
5017 | } | |
5018 | skd_stop_device(skdev); | |
5019 | skd_release_irq(skdev); | |
5020 | ||
5021 | for (i = 0; i < SKD_MAX_BARS; i++) | |
5022 | if (skdev->mem_map[i]) | |
5023 | iounmap((u32 *)skdev->mem_map[i]); | |
5024 | ||
5025 | if (skdev->pcie_error_reporting_is_enabled) | |
5026 | pci_disable_pcie_error_reporting(pdev); | |
5027 | ||
5028 | skd_destruct(skdev); | |
5029 | ||
5030 | pci_release_regions(pdev); | |
5031 | pci_disable_device(pdev); | |
5032 | pci_set_drvdata(pdev, NULL); | |
5033 | ||
5034 | return; | |
5035 | } | |
5036 | ||
5037 | static int skd_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
5038 | { | |
5039 | int i; | |
5040 | struct skd_device *skdev; | |
5041 | ||
5042 | skdev = pci_get_drvdata(pdev); | |
5043 | if (!skdev) { | |
5044 | pr_err("%s: no device data for PCI\n", pci_name(pdev)); | |
5045 | return -EIO; | |
5046 | } | |
5047 | ||
5048 | skd_stop_device(skdev); | |
5049 | ||
5050 | skd_release_irq(skdev); | |
5051 | ||
5052 | for (i = 0; i < SKD_MAX_BARS; i++) | |
5053 | if (skdev->mem_map[i]) | |
5054 | iounmap((u32 *)skdev->mem_map[i]); | |
5055 | ||
5056 | if (skdev->pcie_error_reporting_is_enabled) | |
5057 | pci_disable_pcie_error_reporting(pdev); | |
5058 | ||
5059 | pci_release_regions(pdev); | |
5060 | pci_save_state(pdev); | |
5061 | pci_disable_device(pdev); | |
5062 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
5063 | return 0; | |
5064 | } | |
5065 | ||
5066 | static int skd_pci_resume(struct pci_dev *pdev) | |
5067 | { | |
5068 | int i; | |
5069 | int rc = 0; | |
5070 | struct skd_device *skdev; | |
5071 | ||
5072 | skdev = pci_get_drvdata(pdev); | |
5073 | if (!skdev) { | |
5074 | pr_err("%s: no device data for PCI\n", pci_name(pdev)); | |
5075 | return -1; | |
5076 | } | |
5077 | ||
5078 | pci_set_power_state(pdev, PCI_D0); | |
5079 | pci_enable_wake(pdev, PCI_D0, 0); | |
5080 | pci_restore_state(pdev); | |
5081 | ||
5082 | rc = pci_enable_device(pdev); | |
5083 | if (rc) | |
5084 | return rc; | |
5085 | rc = pci_request_regions(pdev, DRV_NAME); | |
5086 | if (rc) | |
5087 | goto err_out; | |
5088 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); | |
5089 | if (!rc) { | |
5090 | if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { | |
5091 | ||
5092 | pr_err("(%s): consistent DMA mask error %d\n", | |
5093 | pci_name(pdev), rc); | |
5094 | } | |
5095 | } else { | |
5096 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); | |
5097 | if (rc) { | |
5098 | ||
5099 | pr_err("(%s): DMA mask error %d\n", | |
5100 | pci_name(pdev), rc); | |
5101 | goto err_out_regions; | |
5102 | } | |
5103 | } | |
5104 | ||
5105 | pci_set_master(pdev); | |
5106 | rc = pci_enable_pcie_error_reporting(pdev); | |
5107 | if (rc) { | |
5108 | pr_err("(%s): bad enable of PCIe error reporting rc=%d\n", | |
5109 | skdev->name, rc); | |
5110 | skdev->pcie_error_reporting_is_enabled = 0; | |
5111 | } else | |
5112 | skdev->pcie_error_reporting_is_enabled = 1; | |
5113 | ||
5114 | for (i = 0; i < SKD_MAX_BARS; i++) { | |
5115 | ||
5116 | skdev->mem_phys[i] = pci_resource_start(pdev, i); | |
5117 | skdev->mem_size[i] = (u32)pci_resource_len(pdev, i); | |
5118 | skdev->mem_map[i] = ioremap(skdev->mem_phys[i], | |
5119 | skdev->mem_size[i]); | |
5120 | if (!skdev->mem_map[i]) { | |
5121 | pr_err("(%s): Unable to map adapter memory!\n", | |
5122 | skd_name(skdev)); | |
5123 | rc = -ENODEV; | |
5124 | goto err_out_iounmap; | |
5125 | } | |
2e44b427 | 5126 | pr_debug("%s:%s:%d mem_map=%p, phyd=%016llx, size=%d\n", |
5127 | skdev->name, __func__, __LINE__, | |
5128 | skdev->mem_map[i], | |
5129 | (uint64_t)skdev->mem_phys[i], skdev->mem_size[i]); | |
e67f86b3 AB |
5130 | } |
5131 | rc = skd_acquire_irq(skdev); | |
5132 | if (rc) { | |
5133 | ||
5134 | pr_err("(%s): interrupt resource error %d\n", | |
5135 | pci_name(pdev), rc); | |
5136 | goto err_out_iounmap; | |
5137 | } | |
5138 | ||
5139 | rc = skd_start_timer(skdev); | |
5140 | if (rc) | |
5141 | goto err_out_timer; | |
5142 | ||
5143 | init_waitqueue_head(&skdev->waitq); | |
5144 | ||
5145 | skd_start_device(skdev); | |
5146 | ||
5147 | return rc; | |
5148 | ||
5149 | err_out_timer: | |
5150 | skd_stop_device(skdev); | |
5151 | skd_release_irq(skdev); | |
5152 | ||
5153 | err_out_iounmap: | |
5154 | for (i = 0; i < SKD_MAX_BARS; i++) | |
5155 | if (skdev->mem_map[i]) | |
5156 | iounmap(skdev->mem_map[i]); | |
5157 | ||
5158 | if (skdev->pcie_error_reporting_is_enabled) | |
5159 | pci_disable_pcie_error_reporting(pdev); | |
5160 | ||
5161 | err_out_regions: | |
5162 | pci_release_regions(pdev); | |
5163 | ||
5164 | err_out: | |
5165 | pci_disable_device(pdev); | |
5166 | return rc; | |
5167 | } | |
5168 | ||
5169 | static void skd_pci_shutdown(struct pci_dev *pdev) | |
5170 | { | |
5171 | struct skd_device *skdev; | |
5172 | ||
5173 | pr_err("skd_pci_shutdown called\n"); | |
5174 | ||
5175 | skdev = pci_get_drvdata(pdev); | |
5176 | if (!skdev) { | |
5177 | pr_err("%s: no device data for PCI\n", pci_name(pdev)); | |
5178 | return; | |
5179 | } | |
5180 | ||
5181 | pr_err("%s: calling stop\n", skd_name(skdev)); | |
5182 | skd_stop_device(skdev); | |
5183 | } | |
5184 | ||
5185 | static struct pci_driver skd_driver = { | |
5186 | .name = DRV_NAME, | |
5187 | .id_table = skd_pci_tbl, | |
5188 | .probe = skd_pci_probe, | |
5189 | .remove = skd_pci_remove, | |
5190 | .suspend = skd_pci_suspend, | |
5191 | .resume = skd_pci_resume, | |
5192 | .shutdown = skd_pci_shutdown, | |
5193 | }; | |
5194 | ||
5195 | /* | |
5196 | ***************************************************************************** | |
5197 | * LOGGING SUPPORT | |
5198 | ***************************************************************************** | |
5199 | */ | |
5200 | ||
5201 | static const char *skd_name(struct skd_device *skdev) | |
5202 | { | |
5203 | memset(skdev->id_str, 0, sizeof(skdev->id_str)); | |
5204 | ||
5205 | if (skdev->inquiry_is_valid) | |
5206 | snprintf(skdev->id_str, sizeof(skdev->id_str), "%s:%s:[%s]", | |
5207 | skdev->name, skdev->inq_serial_num, | |
5208 | pci_name(skdev->pdev)); | |
5209 | else | |
5210 | snprintf(skdev->id_str, sizeof(skdev->id_str), "%s:??:[%s]", | |
5211 | skdev->name, pci_name(skdev->pdev)); | |
5212 | ||
5213 | return skdev->id_str; | |
5214 | } | |
5215 | ||
5216 | const char *skd_drive_state_to_str(int state) | |
5217 | { | |
5218 | switch (state) { | |
5219 | case FIT_SR_DRIVE_OFFLINE: | |
5220 | return "OFFLINE"; | |
5221 | case FIT_SR_DRIVE_INIT: | |
5222 | return "INIT"; | |
5223 | case FIT_SR_DRIVE_ONLINE: | |
5224 | return "ONLINE"; | |
5225 | case FIT_SR_DRIVE_BUSY: | |
5226 | return "BUSY"; | |
5227 | case FIT_SR_DRIVE_FAULT: | |
5228 | return "FAULT"; | |
5229 | case FIT_SR_DRIVE_DEGRADED: | |
5230 | return "DEGRADED"; | |
5231 | case FIT_SR_PCIE_LINK_DOWN: | |
5232 | return "INK_DOWN"; | |
5233 | case FIT_SR_DRIVE_SOFT_RESET: | |
5234 | return "SOFT_RESET"; | |
5235 | case FIT_SR_DRIVE_NEED_FW_DOWNLOAD: | |
5236 | return "NEED_FW"; | |
5237 | case FIT_SR_DRIVE_INIT_FAULT: | |
5238 | return "INIT_FAULT"; | |
5239 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
5240 | return "BUSY_SANITIZE"; | |
5241 | case FIT_SR_DRIVE_BUSY_ERASE: | |
5242 | return "BUSY_ERASE"; | |
5243 | case FIT_SR_DRIVE_FW_BOOTING: | |
5244 | return "FW_BOOTING"; | |
5245 | default: | |
5246 | return "???"; | |
5247 | } | |
5248 | } | |
5249 | ||
5250 | const char *skd_skdev_state_to_str(enum skd_drvr_state state) | |
5251 | { | |
5252 | switch (state) { | |
5253 | case SKD_DRVR_STATE_LOAD: | |
5254 | return "LOAD"; | |
5255 | case SKD_DRVR_STATE_IDLE: | |
5256 | return "IDLE"; | |
5257 | case SKD_DRVR_STATE_BUSY: | |
5258 | return "BUSY"; | |
5259 | case SKD_DRVR_STATE_STARTING: | |
5260 | return "STARTING"; | |
5261 | case SKD_DRVR_STATE_ONLINE: | |
5262 | return "ONLINE"; | |
5263 | case SKD_DRVR_STATE_PAUSING: | |
5264 | return "PAUSING"; | |
5265 | case SKD_DRVR_STATE_PAUSED: | |
5266 | return "PAUSED"; | |
5267 | case SKD_DRVR_STATE_DRAINING_TIMEOUT: | |
5268 | return "DRAINING_TIMEOUT"; | |
5269 | case SKD_DRVR_STATE_RESTARTING: | |
5270 | return "RESTARTING"; | |
5271 | case SKD_DRVR_STATE_RESUMING: | |
5272 | return "RESUMING"; | |
5273 | case SKD_DRVR_STATE_STOPPING: | |
5274 | return "STOPPING"; | |
5275 | case SKD_DRVR_STATE_SYNCING: | |
5276 | return "SYNCING"; | |
5277 | case SKD_DRVR_STATE_FAULT: | |
5278 | return "FAULT"; | |
5279 | case SKD_DRVR_STATE_DISAPPEARED: | |
5280 | return "DISAPPEARED"; | |
5281 | case SKD_DRVR_STATE_BUSY_ERASE: | |
5282 | return "BUSY_ERASE"; | |
5283 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
5284 | return "BUSY_SANITIZE"; | |
5285 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
5286 | return "BUSY_IMMINENT"; | |
5287 | case SKD_DRVR_STATE_WAIT_BOOT: | |
5288 | return "WAIT_BOOT"; | |
5289 | ||
5290 | default: | |
5291 | return "???"; | |
5292 | } | |
5293 | } | |
5294 | ||
5295 | const char *skd_skmsg_state_to_str(enum skd_fit_msg_state state) | |
5296 | { | |
5297 | switch (state) { | |
5298 | case SKD_MSG_STATE_IDLE: | |
5299 | return "IDLE"; | |
5300 | case SKD_MSG_STATE_BUSY: | |
5301 | return "BUSY"; | |
5302 | default: | |
5303 | return "???"; | |
5304 | } | |
5305 | } | |
5306 | ||
5307 | const char *skd_skreq_state_to_str(enum skd_req_state state) | |
5308 | { | |
5309 | switch (state) { | |
5310 | case SKD_REQ_STATE_IDLE: | |
5311 | return "IDLE"; | |
5312 | case SKD_REQ_STATE_SETUP: | |
5313 | return "SETUP"; | |
5314 | case SKD_REQ_STATE_BUSY: | |
5315 | return "BUSY"; | |
5316 | case SKD_REQ_STATE_COMPLETED: | |
5317 | return "COMPLETED"; | |
5318 | case SKD_REQ_STATE_TIMEOUT: | |
5319 | return "TIMEOUT"; | |
5320 | case SKD_REQ_STATE_ABORTED: | |
5321 | return "ABORTED"; | |
5322 | default: | |
5323 | return "???"; | |
5324 | } | |
5325 | } | |
5326 | ||
5327 | static void skd_log_skdev(struct skd_device *skdev, const char *event) | |
5328 | { | |
2e44b427 | 5329 | pr_debug("%s:%s:%d (%s) skdev=%p event='%s'\n", |
5330 | skdev->name, __func__, __LINE__, skdev->name, skdev, event); | |
5331 | pr_debug("%s:%s:%d drive_state=%s(%d) driver_state=%s(%d)\n", | |
5332 | skdev->name, __func__, __LINE__, | |
5333 | skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, | |
5334 | skd_skdev_state_to_str(skdev->state), skdev->state); | |
5335 | pr_debug("%s:%s:%d busy=%d limit=%d dev=%d lowat=%d\n", | |
5336 | skdev->name, __func__, __LINE__, | |
5337 | skdev->in_flight, skdev->cur_max_queue_depth, | |
5338 | skdev->dev_max_queue_depth, skdev->queue_low_water_mark); | |
5339 | pr_debug("%s:%s:%d timestamp=0x%x cycle=%d cycle_ix=%d\n", | |
5340 | skdev->name, __func__, __LINE__, | |
5341 | skdev->timeout_stamp, skdev->skcomp_cycle, skdev->skcomp_ix); | |
e67f86b3 AB |
5342 | } |
5343 | ||
5344 | static void skd_log_skmsg(struct skd_device *skdev, | |
5345 | struct skd_fitmsg_context *skmsg, const char *event) | |
5346 | { | |
2e44b427 | 5347 | pr_debug("%s:%s:%d (%s) skmsg=%p event='%s'\n", |
5348 | skdev->name, __func__, __LINE__, skdev->name, skmsg, event); | |
5349 | pr_debug("%s:%s:%d state=%s(%d) id=0x%04x length=%d\n", | |
5350 | skdev->name, __func__, __LINE__, | |
5351 | skd_skmsg_state_to_str(skmsg->state), skmsg->state, | |
5352 | skmsg->id, skmsg->length); | |
e67f86b3 AB |
5353 | } |
5354 | ||
5355 | static void skd_log_skreq(struct skd_device *skdev, | |
5356 | struct skd_request_context *skreq, const char *event) | |
5357 | { | |
2e44b427 | 5358 | pr_debug("%s:%s:%d (%s) skreq=%p event='%s'\n", |
5359 | skdev->name, __func__, __LINE__, skdev->name, skreq, event); | |
5360 | pr_debug("%s:%s:%d state=%s(%d) id=0x%04x fitmsg=0x%04x\n", | |
5361 | skdev->name, __func__, __LINE__, | |
5362 | skd_skreq_state_to_str(skreq->state), skreq->state, | |
5363 | skreq->id, skreq->fitmsg_id); | |
5364 | pr_debug("%s:%s:%d timo=0x%x sg_dir=%d n_sg=%d\n", | |
5365 | skdev->name, __func__, __LINE__, | |
5366 | skreq->timeout_stamp, skreq->sg_data_dir, skreq->n_sg); | |
e67f86b3 | 5367 | |
fcd37eb3 JA |
5368 | if (skreq->req != NULL) { |
5369 | struct request *req = skreq->req; | |
5370 | u32 lba = (u32)blk_rq_pos(req); | |
5371 | u32 count = blk_rq_sectors(req); | |
e67f86b3 | 5372 | |
fcd37eb3 JA |
5373 | pr_debug("%s:%s:%d " |
5374 | "req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", | |
5375 | skdev->name, __func__, __LINE__, | |
5376 | req, lba, lba, count, count, | |
5377 | (int)rq_data_dir(req)); | |
5378 | } else | |
5379 | pr_debug("%s:%s:%d req=NULL\n", | |
5380 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
5381 | } |
5382 | ||
5383 | /* | |
5384 | ***************************************************************************** | |
5385 | * MODULE GLUE | |
5386 | ***************************************************************************** | |
5387 | */ | |
5388 | ||
5389 | static int __init skd_init(void) | |
5390 | { | |
e67f86b3 AB |
5391 | pr_info(PFX " v%s-b%s loaded\n", DRV_VERSION, DRV_BUILD_ID); |
5392 | ||
5393 | switch (skd_isr_type) { | |
5394 | case SKD_IRQ_LEGACY: | |
5395 | case SKD_IRQ_MSI: | |
5396 | case SKD_IRQ_MSIX: | |
5397 | break; | |
5398 | default: | |
fbed149a | 5399 | pr_err(PFX "skd_isr_type %d invalid, re-set to %d\n", |
e67f86b3 AB |
5400 | skd_isr_type, SKD_IRQ_DEFAULT); |
5401 | skd_isr_type = SKD_IRQ_DEFAULT; | |
5402 | } | |
5403 | ||
fbed149a BZ |
5404 | if (skd_max_queue_depth < 1 || |
5405 | skd_max_queue_depth > SKD_MAX_QUEUE_DEPTH) { | |
5406 | pr_err(PFX "skd_max_queue_depth %d invalid, re-set to %d\n", | |
e67f86b3 AB |
5407 | skd_max_queue_depth, SKD_MAX_QUEUE_DEPTH_DEFAULT); |
5408 | skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; | |
5409 | } | |
5410 | ||
5411 | if (skd_max_req_per_msg < 1 || skd_max_req_per_msg > 14) { | |
fbed149a | 5412 | pr_err(PFX "skd_max_req_per_msg %d invalid, re-set to %d\n", |
e67f86b3 AB |
5413 | skd_max_req_per_msg, SKD_MAX_REQ_PER_MSG_DEFAULT); |
5414 | skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; | |
5415 | } | |
5416 | ||
5417 | if (skd_sgs_per_request < 1 || skd_sgs_per_request > 4096) { | |
fbed149a | 5418 | pr_err(PFX "skd_sg_per_request %d invalid, re-set to %d\n", |
e67f86b3 AB |
5419 | skd_sgs_per_request, SKD_N_SG_PER_REQ_DEFAULT); |
5420 | skd_sgs_per_request = SKD_N_SG_PER_REQ_DEFAULT; | |
5421 | } | |
5422 | ||
5423 | if (skd_dbg_level < 0 || skd_dbg_level > 2) { | |
fbed149a | 5424 | pr_err(PFX "skd_dbg_level %d invalid, re-set to %d\n", |
e67f86b3 AB |
5425 | skd_dbg_level, 0); |
5426 | skd_dbg_level = 0; | |
5427 | } | |
5428 | ||
5429 | if (skd_isr_comp_limit < 0) { | |
fbed149a | 5430 | pr_err(PFX "skd_isr_comp_limit %d invalid, set to %d\n", |
e67f86b3 AB |
5431 | skd_isr_comp_limit, 0); |
5432 | skd_isr_comp_limit = 0; | |
5433 | } | |
5434 | ||
5435 | if (skd_max_pass_thru < 1 || skd_max_pass_thru > 50) { | |
fbed149a | 5436 | pr_err(PFX "skd_max_pass_thru %d invalid, re-set to %d\n", |
e67f86b3 AB |
5437 | skd_max_pass_thru, SKD_N_SPECIAL_CONTEXT); |
5438 | skd_max_pass_thru = SKD_N_SPECIAL_CONTEXT; | |
5439 | } | |
5440 | ||
b8df6647 | 5441 | return pci_register_driver(&skd_driver); |
e67f86b3 AB |
5442 | } |
5443 | ||
5444 | static void __exit skd_exit(void) | |
5445 | { | |
5446 | pr_info(PFX " v%s-b%s unloading\n", DRV_VERSION, DRV_BUILD_ID); | |
5447 | ||
e67f86b3 | 5448 | pci_unregister_driver(&skd_driver); |
b8df6647 BZ |
5449 | |
5450 | if (skd_major) | |
5451 | unregister_blkdev(skd_major, DRV_NAME); | |
e67f86b3 AB |
5452 | } |
5453 | ||
e67f86b3 AB |
5454 | module_init(skd_init); |
5455 | module_exit(skd_exit); |