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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> | |
e67f86b3 AB |
39 | #include <linux/aer.h> |
40 | #include <linux/ctype.h> | |
41 | #include <linux/wait.h> | |
42 | #include <linux/uio.h> | |
43 | #include <scsi/scsi.h> | |
e67f86b3 AB |
44 | #include <scsi/sg.h> |
45 | #include <linux/io.h> | |
46 | #include <linux/uaccess.h> | |
4ca90b53 | 47 | #include <asm/unaligned.h> |
e67f86b3 AB |
48 | |
49 | #include "skd_s1120.h" | |
50 | ||
51 | static int skd_dbg_level; | |
52 | static int skd_isr_comp_limit = 4; | |
53 | ||
54 | enum { | |
55 | STEC_LINK_2_5GTS = 0, | |
56 | STEC_LINK_5GTS = 1, | |
57 | STEC_LINK_8GTS = 2, | |
58 | STEC_LINK_UNKNOWN = 0xFF | |
59 | }; | |
60 | ||
61 | enum { | |
62 | SKD_FLUSH_INITIALIZER, | |
63 | SKD_FLUSH_ZERO_SIZE_FIRST, | |
64 | SKD_FLUSH_DATA_SECOND, | |
65 | }; | |
66 | ||
e67f86b3 AB |
67 | #define SKD_ASSERT(expr) \ |
68 | do { \ | |
69 | if (unlikely(!(expr))) { \ | |
70 | pr_err("Assertion failed! %s,%s,%s,line=%d\n", \ | |
71 | # expr, __FILE__, __func__, __LINE__); \ | |
72 | } \ | |
73 | } while (0) | |
74 | ||
e67f86b3 AB |
75 | #define DRV_NAME "skd" |
76 | #define DRV_VERSION "2.2.1" | |
77 | #define DRV_BUILD_ID "0260" | |
78 | #define PFX DRV_NAME ": " | |
79 | #define DRV_BIN_VERSION 0x100 | |
80 | #define DRV_VER_COMPL "2.2.1." DRV_BUILD_ID | |
81 | ||
82 | MODULE_AUTHOR("bug-reports: support@stec-inc.com"); | |
83 | MODULE_LICENSE("Dual BSD/GPL"); | |
84 | ||
38d4a1bb | 85 | MODULE_DESCRIPTION("STEC s1120 PCIe SSD block driver (b" DRV_BUILD_ID ")"); |
e67f86b3 AB |
86 | MODULE_VERSION(DRV_VERSION "-" DRV_BUILD_ID); |
87 | ||
88 | #define PCI_VENDOR_ID_STEC 0x1B39 | |
89 | #define PCI_DEVICE_ID_S1120 0x0001 | |
90 | ||
91 | #define SKD_FUA_NV (1 << 1) | |
92 | #define SKD_MINORS_PER_DEVICE 16 | |
93 | ||
94 | #define SKD_MAX_QUEUE_DEPTH 200u | |
95 | ||
96 | #define SKD_PAUSE_TIMEOUT (5 * 1000) | |
97 | ||
98 | #define SKD_N_FITMSG_BYTES (512u) | |
99 | ||
100 | #define SKD_N_SPECIAL_CONTEXT 32u | |
101 | #define SKD_N_SPECIAL_FITMSG_BYTES (128u) | |
102 | ||
103 | /* SG elements are 32 bytes, so we can make this 4096 and still be under the | |
104 | * 128KB limit. That allows 4096*4K = 16M xfer size | |
105 | */ | |
106 | #define SKD_N_SG_PER_REQ_DEFAULT 256u | |
107 | #define SKD_N_SG_PER_SPECIAL 256u | |
108 | ||
109 | #define SKD_N_COMPLETION_ENTRY 256u | |
110 | #define SKD_N_READ_CAP_BYTES (8u) | |
111 | ||
112 | #define SKD_N_INTERNAL_BYTES (512u) | |
113 | ||
114 | /* 5 bits of uniqifier, 0xF800 */ | |
115 | #define SKD_ID_INCR (0x400) | |
116 | #define SKD_ID_TABLE_MASK (3u << 8u) | |
117 | #define SKD_ID_RW_REQUEST (0u << 8u) | |
118 | #define SKD_ID_INTERNAL (1u << 8u) | |
119 | #define SKD_ID_SPECIAL_REQUEST (2u << 8u) | |
120 | #define SKD_ID_FIT_MSG (3u << 8u) | |
121 | #define SKD_ID_SLOT_MASK 0x00FFu | |
122 | #define SKD_ID_SLOT_AND_TABLE_MASK 0x03FFu | |
123 | ||
124 | #define SKD_N_TIMEOUT_SLOT 4u | |
125 | #define SKD_TIMEOUT_SLOT_MASK 3u | |
126 | ||
127 | #define SKD_N_MAX_SECTORS 2048u | |
128 | ||
129 | #define SKD_MAX_RETRIES 2u | |
130 | ||
131 | #define SKD_TIMER_SECONDS(seconds) (seconds) | |
132 | #define SKD_TIMER_MINUTES(minutes) ((minutes) * (60)) | |
133 | ||
134 | #define INQ_STD_NBYTES 36 | |
e67f86b3 AB |
135 | |
136 | enum skd_drvr_state { | |
137 | SKD_DRVR_STATE_LOAD, | |
138 | SKD_DRVR_STATE_IDLE, | |
139 | SKD_DRVR_STATE_BUSY, | |
140 | SKD_DRVR_STATE_STARTING, | |
141 | SKD_DRVR_STATE_ONLINE, | |
142 | SKD_DRVR_STATE_PAUSING, | |
143 | SKD_DRVR_STATE_PAUSED, | |
144 | SKD_DRVR_STATE_DRAINING_TIMEOUT, | |
145 | SKD_DRVR_STATE_RESTARTING, | |
146 | SKD_DRVR_STATE_RESUMING, | |
147 | SKD_DRVR_STATE_STOPPING, | |
148 | SKD_DRVR_STATE_FAULT, | |
149 | SKD_DRVR_STATE_DISAPPEARED, | |
150 | SKD_DRVR_STATE_PROTOCOL_MISMATCH, | |
151 | SKD_DRVR_STATE_BUSY_ERASE, | |
152 | SKD_DRVR_STATE_BUSY_SANITIZE, | |
153 | SKD_DRVR_STATE_BUSY_IMMINENT, | |
154 | SKD_DRVR_STATE_WAIT_BOOT, | |
155 | SKD_DRVR_STATE_SYNCING, | |
156 | }; | |
157 | ||
158 | #define SKD_WAIT_BOOT_TIMO SKD_TIMER_SECONDS(90u) | |
159 | #define SKD_STARTING_TIMO SKD_TIMER_SECONDS(8u) | |
160 | #define SKD_RESTARTING_TIMO SKD_TIMER_MINUTES(4u) | |
161 | #define SKD_DRAINING_TIMO SKD_TIMER_SECONDS(6u) | |
162 | #define SKD_BUSY_TIMO SKD_TIMER_MINUTES(20u) | |
163 | #define SKD_STARTED_BUSY_TIMO SKD_TIMER_SECONDS(60u) | |
164 | #define SKD_START_WAIT_SECONDS 90u | |
165 | ||
166 | enum skd_req_state { | |
167 | SKD_REQ_STATE_IDLE, | |
168 | SKD_REQ_STATE_SETUP, | |
169 | SKD_REQ_STATE_BUSY, | |
170 | SKD_REQ_STATE_COMPLETED, | |
171 | SKD_REQ_STATE_TIMEOUT, | |
172 | SKD_REQ_STATE_ABORTED, | |
173 | }; | |
174 | ||
175 | enum skd_fit_msg_state { | |
176 | SKD_MSG_STATE_IDLE, | |
177 | SKD_MSG_STATE_BUSY, | |
178 | }; | |
179 | ||
180 | enum skd_check_status_action { | |
181 | SKD_CHECK_STATUS_REPORT_GOOD, | |
182 | SKD_CHECK_STATUS_REPORT_SMART_ALERT, | |
183 | SKD_CHECK_STATUS_REQUEUE_REQUEST, | |
184 | SKD_CHECK_STATUS_REPORT_ERROR, | |
185 | SKD_CHECK_STATUS_BUSY_IMMINENT, | |
186 | }; | |
187 | ||
188 | struct skd_fitmsg_context { | |
189 | enum skd_fit_msg_state state; | |
190 | ||
191 | struct skd_fitmsg_context *next; | |
192 | ||
193 | u32 id; | |
194 | u16 outstanding; | |
195 | ||
196 | u32 length; | |
197 | u32 offset; | |
198 | ||
199 | u8 *msg_buf; | |
200 | dma_addr_t mb_dma_address; | |
201 | }; | |
202 | ||
203 | struct skd_request_context { | |
204 | enum skd_req_state state; | |
205 | ||
206 | struct skd_request_context *next; | |
207 | ||
208 | u16 id; | |
209 | u32 fitmsg_id; | |
210 | ||
211 | struct request *req; | |
e67f86b3 | 212 | u8 flush_cmd; |
e67f86b3 AB |
213 | |
214 | u32 timeout_stamp; | |
215 | u8 sg_data_dir; | |
216 | struct scatterlist *sg; | |
217 | u32 n_sg; | |
218 | u32 sg_byte_count; | |
219 | ||
220 | struct fit_sg_descriptor *sksg_list; | |
221 | dma_addr_t sksg_dma_address; | |
222 | ||
223 | struct fit_completion_entry_v1 completion; | |
224 | ||
225 | struct fit_comp_error_info err_info; | |
226 | ||
227 | }; | |
228 | #define SKD_DATA_DIR_HOST_TO_CARD 1 | |
229 | #define SKD_DATA_DIR_CARD_TO_HOST 2 | |
e67f86b3 AB |
230 | |
231 | struct skd_special_context { | |
232 | struct skd_request_context req; | |
233 | ||
234 | u8 orphaned; | |
235 | ||
236 | void *data_buf; | |
237 | dma_addr_t db_dma_address; | |
238 | ||
239 | u8 *msg_buf; | |
240 | dma_addr_t mb_dma_address; | |
241 | }; | |
242 | ||
243 | struct skd_sg_io { | |
244 | fmode_t mode; | |
245 | void __user *argp; | |
246 | ||
247 | struct sg_io_hdr sg; | |
248 | ||
249 | u8 cdb[16]; | |
250 | ||
251 | u32 dxfer_len; | |
252 | u32 iovcnt; | |
253 | struct sg_iovec *iov; | |
254 | struct sg_iovec no_iov_iov; | |
255 | ||
256 | struct skd_special_context *skspcl; | |
257 | }; | |
258 | ||
259 | typedef enum skd_irq_type { | |
260 | SKD_IRQ_LEGACY, | |
261 | SKD_IRQ_MSI, | |
262 | SKD_IRQ_MSIX | |
263 | } skd_irq_type_t; | |
264 | ||
265 | #define SKD_MAX_BARS 2 | |
266 | ||
267 | struct skd_device { | |
268 | volatile void __iomem *mem_map[SKD_MAX_BARS]; | |
269 | resource_size_t mem_phys[SKD_MAX_BARS]; | |
270 | u32 mem_size[SKD_MAX_BARS]; | |
271 | ||
e67f86b3 AB |
272 | struct skd_msix_entry *msix_entries; |
273 | ||
274 | struct pci_dev *pdev; | |
275 | int pcie_error_reporting_is_enabled; | |
276 | ||
277 | spinlock_t lock; | |
278 | struct gendisk *disk; | |
279 | struct request_queue *queue; | |
280 | struct device *class_dev; | |
281 | int gendisk_on; | |
282 | int sync_done; | |
283 | ||
284 | atomic_t device_count; | |
285 | u32 devno; | |
286 | u32 major; | |
287 | char name[32]; | |
288 | char isr_name[30]; | |
289 | ||
290 | enum skd_drvr_state state; | |
291 | u32 drive_state; | |
292 | ||
293 | u32 in_flight; | |
294 | u32 cur_max_queue_depth; | |
295 | u32 queue_low_water_mark; | |
296 | u32 dev_max_queue_depth; | |
297 | ||
298 | u32 num_fitmsg_context; | |
299 | u32 num_req_context; | |
300 | ||
301 | u32 timeout_slot[SKD_N_TIMEOUT_SLOT]; | |
302 | u32 timeout_stamp; | |
303 | struct skd_fitmsg_context *skmsg_free_list; | |
304 | struct skd_fitmsg_context *skmsg_table; | |
305 | ||
306 | struct skd_request_context *skreq_free_list; | |
307 | struct skd_request_context *skreq_table; | |
308 | ||
309 | struct skd_special_context *skspcl_free_list; | |
310 | struct skd_special_context *skspcl_table; | |
311 | ||
312 | struct skd_special_context internal_skspcl; | |
313 | u32 read_cap_blocksize; | |
314 | u32 read_cap_last_lba; | |
315 | int read_cap_is_valid; | |
316 | int inquiry_is_valid; | |
317 | u8 inq_serial_num[13]; /*12 chars plus null term */ | |
318 | u8 id_str[80]; /* holds a composite name (pci + sernum) */ | |
319 | ||
320 | u8 skcomp_cycle; | |
321 | u32 skcomp_ix; | |
322 | struct fit_completion_entry_v1 *skcomp_table; | |
323 | struct fit_comp_error_info *skerr_table; | |
324 | dma_addr_t cq_dma_address; | |
325 | ||
326 | wait_queue_head_t waitq; | |
327 | ||
328 | struct timer_list timer; | |
329 | u32 timer_countdown; | |
330 | u32 timer_substate; | |
331 | ||
332 | int n_special; | |
333 | int sgs_per_request; | |
334 | u32 last_mtd; | |
335 | ||
336 | u32 proto_ver; | |
337 | ||
338 | int dbg_level; | |
339 | u32 connect_time_stamp; | |
340 | int connect_retries; | |
341 | #define SKD_MAX_CONNECT_RETRIES 16 | |
342 | u32 drive_jiffies; | |
343 | ||
344 | u32 timo_slot; | |
345 | ||
e67f86b3 | 346 | |
38d4a1bb | 347 | struct work_struct completion_worker; |
e67f86b3 AB |
348 | }; |
349 | ||
350 | #define SKD_WRITEL(DEV, VAL, OFF) skd_reg_write32(DEV, VAL, OFF) | |
351 | #define SKD_READL(DEV, OFF) skd_reg_read32(DEV, OFF) | |
352 | #define SKD_WRITEQ(DEV, VAL, OFF) skd_reg_write64(DEV, VAL, OFF) | |
353 | ||
354 | static inline u32 skd_reg_read32(struct skd_device *skdev, u32 offset) | |
355 | { | |
356 | u32 val; | |
357 | ||
358 | if (likely(skdev->dbg_level < 2)) | |
359 | return readl(skdev->mem_map[1] + offset); | |
360 | else { | |
361 | barrier(); | |
362 | val = readl(skdev->mem_map[1] + offset); | |
363 | barrier(); | |
2e44b427 | 364 | pr_debug("%s:%s:%d offset %x = %x\n", |
365 | skdev->name, __func__, __LINE__, offset, val); | |
e67f86b3 AB |
366 | return val; |
367 | } | |
368 | ||
369 | } | |
370 | ||
371 | static inline void skd_reg_write32(struct skd_device *skdev, u32 val, | |
372 | u32 offset) | |
373 | { | |
374 | if (likely(skdev->dbg_level < 2)) { | |
375 | writel(val, skdev->mem_map[1] + offset); | |
376 | barrier(); | |
e67f86b3 AB |
377 | } else { |
378 | barrier(); | |
379 | writel(val, skdev->mem_map[1] + offset); | |
380 | barrier(); | |
2e44b427 | 381 | pr_debug("%s:%s:%d offset %x = %x\n", |
382 | skdev->name, __func__, __LINE__, offset, val); | |
e67f86b3 AB |
383 | } |
384 | } | |
385 | ||
386 | static inline void skd_reg_write64(struct skd_device *skdev, u64 val, | |
387 | u32 offset) | |
388 | { | |
389 | if (likely(skdev->dbg_level < 2)) { | |
390 | writeq(val, skdev->mem_map[1] + offset); | |
391 | barrier(); | |
e67f86b3 AB |
392 | } else { |
393 | barrier(); | |
394 | writeq(val, skdev->mem_map[1] + offset); | |
395 | barrier(); | |
2e44b427 | 396 | pr_debug("%s:%s:%d offset %x = %016llx\n", |
397 | skdev->name, __func__, __LINE__, offset, val); | |
e67f86b3 AB |
398 | } |
399 | } | |
400 | ||
401 | ||
402 | #define SKD_IRQ_DEFAULT SKD_IRQ_MSI | |
403 | static int skd_isr_type = SKD_IRQ_DEFAULT; | |
404 | ||
405 | module_param(skd_isr_type, int, 0444); | |
406 | MODULE_PARM_DESC(skd_isr_type, "Interrupt type capability." | |
407 | " (0==legacy, 1==MSI, 2==MSI-X, default==1)"); | |
408 | ||
409 | #define SKD_MAX_REQ_PER_MSG_DEFAULT 1 | |
410 | static int skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; | |
411 | ||
412 | module_param(skd_max_req_per_msg, int, 0444); | |
413 | MODULE_PARM_DESC(skd_max_req_per_msg, | |
414 | "Maximum SCSI requests packed in a single message." | |
415 | " (1-14, default==1)"); | |
416 | ||
417 | #define SKD_MAX_QUEUE_DEPTH_DEFAULT 64 | |
418 | #define SKD_MAX_QUEUE_DEPTH_DEFAULT_STR "64" | |
419 | static int skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; | |
420 | ||
421 | module_param(skd_max_queue_depth, int, 0444); | |
422 | MODULE_PARM_DESC(skd_max_queue_depth, | |
423 | "Maximum SCSI requests issued to s1120." | |
424 | " (1-200, default==" SKD_MAX_QUEUE_DEPTH_DEFAULT_STR ")"); | |
425 | ||
426 | static int skd_sgs_per_request = SKD_N_SG_PER_REQ_DEFAULT; | |
427 | module_param(skd_sgs_per_request, int, 0444); | |
428 | MODULE_PARM_DESC(skd_sgs_per_request, | |
429 | "Maximum SG elements per block request." | |
430 | " (1-4096, default==256)"); | |
431 | ||
432 | static int skd_max_pass_thru = SKD_N_SPECIAL_CONTEXT; | |
433 | module_param(skd_max_pass_thru, int, 0444); | |
434 | MODULE_PARM_DESC(skd_max_pass_thru, | |
435 | "Maximum SCSI pass-thru at a time." " (1-50, default==32)"); | |
436 | ||
437 | module_param(skd_dbg_level, int, 0444); | |
438 | MODULE_PARM_DESC(skd_dbg_level, "s1120 debug level (0,1,2)"); | |
439 | ||
440 | module_param(skd_isr_comp_limit, int, 0444); | |
441 | MODULE_PARM_DESC(skd_isr_comp_limit, "s1120 isr comp limit (0=none) default=4"); | |
442 | ||
e67f86b3 AB |
443 | /* Major device number dynamically assigned. */ |
444 | static u32 skd_major; | |
445 | ||
e67f86b3 AB |
446 | static void skd_destruct(struct skd_device *skdev); |
447 | static const struct block_device_operations skd_blockdev_ops; | |
448 | static void skd_send_fitmsg(struct skd_device *skdev, | |
449 | struct skd_fitmsg_context *skmsg); | |
450 | static void skd_send_special_fitmsg(struct skd_device *skdev, | |
451 | struct skd_special_context *skspcl); | |
452 | static void skd_request_fn(struct request_queue *rq); | |
453 | static void skd_end_request(struct skd_device *skdev, | |
454 | struct skd_request_context *skreq, int error); | |
455 | static int skd_preop_sg_list(struct skd_device *skdev, | |
456 | struct skd_request_context *skreq); | |
457 | static void skd_postop_sg_list(struct skd_device *skdev, | |
458 | struct skd_request_context *skreq); | |
459 | ||
460 | static void skd_restart_device(struct skd_device *skdev); | |
461 | static int skd_quiesce_dev(struct skd_device *skdev); | |
462 | static int skd_unquiesce_dev(struct skd_device *skdev); | |
463 | static void skd_release_special(struct skd_device *skdev, | |
464 | struct skd_special_context *skspcl); | |
465 | static void skd_disable_interrupts(struct skd_device *skdev); | |
466 | static void skd_isr_fwstate(struct skd_device *skdev); | |
467 | static void skd_recover_requests(struct skd_device *skdev, int requeue); | |
468 | static void skd_soft_reset(struct skd_device *skdev); | |
469 | ||
470 | static const char *skd_name(struct skd_device *skdev); | |
471 | const char *skd_drive_state_to_str(int state); | |
472 | const char *skd_skdev_state_to_str(enum skd_drvr_state state); | |
473 | static void skd_log_skdev(struct skd_device *skdev, const char *event); | |
474 | static void skd_log_skmsg(struct skd_device *skdev, | |
475 | struct skd_fitmsg_context *skmsg, const char *event); | |
476 | static void skd_log_skreq(struct skd_device *skdev, | |
477 | struct skd_request_context *skreq, const char *event); | |
478 | ||
e67f86b3 AB |
479 | /* |
480 | ***************************************************************************** | |
481 | * READ/WRITE REQUESTS | |
482 | ***************************************************************************** | |
483 | */ | |
fcd37eb3 | 484 | static void skd_fail_all_pending(struct skd_device *skdev) |
e67f86b3 AB |
485 | { |
486 | struct request_queue *q = skdev->queue; | |
487 | struct request *req; | |
488 | ||
489 | for (;; ) { | |
490 | req = blk_peek_request(q); | |
491 | if (req == NULL) | |
492 | break; | |
493 | blk_start_request(req); | |
494 | __blk_end_request_all(req, -EIO); | |
495 | } | |
496 | } | |
497 | ||
e67f86b3 AB |
498 | static void |
499 | skd_prep_rw_cdb(struct skd_scsi_request *scsi_req, | |
500 | int data_dir, unsigned lba, | |
501 | unsigned count) | |
502 | { | |
503 | if (data_dir == READ) | |
504 | scsi_req->cdb[0] = 0x28; | |
505 | else | |
506 | scsi_req->cdb[0] = 0x2a; | |
507 | ||
508 | scsi_req->cdb[1] = 0; | |
509 | scsi_req->cdb[2] = (lba & 0xff000000) >> 24; | |
510 | scsi_req->cdb[3] = (lba & 0xff0000) >> 16; | |
511 | scsi_req->cdb[4] = (lba & 0xff00) >> 8; | |
512 | scsi_req->cdb[5] = (lba & 0xff); | |
513 | scsi_req->cdb[6] = 0; | |
514 | scsi_req->cdb[7] = (count & 0xff00) >> 8; | |
515 | scsi_req->cdb[8] = count & 0xff; | |
516 | scsi_req->cdb[9] = 0; | |
517 | } | |
518 | ||
519 | static void | |
520 | skd_prep_zerosize_flush_cdb(struct skd_scsi_request *scsi_req, | |
38d4a1bb | 521 | struct skd_request_context *skreq) |
e67f86b3 AB |
522 | { |
523 | skreq->flush_cmd = 1; | |
524 | ||
525 | scsi_req->cdb[0] = 0x35; | |
526 | scsi_req->cdb[1] = 0; | |
527 | scsi_req->cdb[2] = 0; | |
528 | scsi_req->cdb[3] = 0; | |
529 | scsi_req->cdb[4] = 0; | |
530 | scsi_req->cdb[5] = 0; | |
531 | scsi_req->cdb[6] = 0; | |
532 | scsi_req->cdb[7] = 0; | |
533 | scsi_req->cdb[8] = 0; | |
534 | scsi_req->cdb[9] = 0; | |
535 | } | |
536 | ||
e67f86b3 AB |
537 | static void skd_request_fn_not_online(struct request_queue *q); |
538 | ||
539 | static void skd_request_fn(struct request_queue *q) | |
540 | { | |
541 | struct skd_device *skdev = q->queuedata; | |
542 | struct skd_fitmsg_context *skmsg = NULL; | |
543 | struct fit_msg_hdr *fmh = NULL; | |
544 | struct skd_request_context *skreq; | |
545 | struct request *req = NULL; | |
e67f86b3 | 546 | struct skd_scsi_request *scsi_req; |
e67f86b3 AB |
547 | unsigned long io_flags; |
548 | int error; | |
549 | u32 lba; | |
550 | u32 count; | |
551 | int data_dir; | |
552 | u32 be_lba; | |
553 | u32 be_count; | |
554 | u64 be_dmaa; | |
555 | u64 cmdctxt; | |
556 | u32 timo_slot; | |
557 | void *cmd_ptr; | |
558 | int flush, fua; | |
559 | ||
560 | if (skdev->state != SKD_DRVR_STATE_ONLINE) { | |
561 | skd_request_fn_not_online(q); | |
562 | return; | |
563 | } | |
564 | ||
6a5ec65b | 565 | if (blk_queue_stopped(skdev->queue)) { |
e67f86b3 AB |
566 | if (skdev->skmsg_free_list == NULL || |
567 | skdev->skreq_free_list == NULL || | |
568 | skdev->in_flight >= skdev->queue_low_water_mark) | |
569 | /* There is still some kind of shortage */ | |
570 | return; | |
571 | ||
6a5ec65b | 572 | queue_flag_clear(QUEUE_FLAG_STOPPED, skdev->queue); |
e67f86b3 AB |
573 | } |
574 | ||
575 | /* | |
576 | * Stop conditions: | |
577 | * - There are no more native requests | |
578 | * - There are already the maximum number of requests in progress | |
579 | * - There are no more skd_request_context entries | |
580 | * - There are no more FIT msg buffers | |
581 | */ | |
582 | for (;; ) { | |
583 | ||
584 | flush = fua = 0; | |
585 | ||
fcd37eb3 | 586 | req = blk_peek_request(q); |
e67f86b3 | 587 | |
fcd37eb3 JA |
588 | /* Are there any native requests to start? */ |
589 | if (req == NULL) | |
590 | break; | |
e67f86b3 | 591 | |
fcd37eb3 JA |
592 | lba = (u32)blk_rq_pos(req); |
593 | count = blk_rq_sectors(req); | |
594 | data_dir = rq_data_dir(req); | |
595 | io_flags = req->cmd_flags; | |
e67f86b3 | 596 | |
3a5e02ce | 597 | if (req_op(req) == REQ_OP_FLUSH) |
fcd37eb3 | 598 | flush++; |
e67f86b3 | 599 | |
fcd37eb3 JA |
600 | if (io_flags & REQ_FUA) |
601 | fua++; | |
e67f86b3 | 602 | |
fcd37eb3 JA |
603 | pr_debug("%s:%s:%d new req=%p lba=%u(0x%x) " |
604 | "count=%u(0x%x) dir=%d\n", | |
605 | skdev->name, __func__, __LINE__, | |
606 | req, lba, lba, count, count, data_dir); | |
e67f86b3 | 607 | |
38d4a1bb | 608 | /* At this point we know there is a request */ |
e67f86b3 AB |
609 | |
610 | /* Are too many requets already in progress? */ | |
611 | if (skdev->in_flight >= skdev->cur_max_queue_depth) { | |
2e44b427 | 612 | pr_debug("%s:%s:%d qdepth %d, limit %d\n", |
613 | skdev->name, __func__, __LINE__, | |
614 | skdev->in_flight, skdev->cur_max_queue_depth); | |
e67f86b3 AB |
615 | break; |
616 | } | |
617 | ||
618 | /* Is a skd_request_context available? */ | |
619 | skreq = skdev->skreq_free_list; | |
620 | if (skreq == NULL) { | |
2e44b427 | 621 | pr_debug("%s:%s:%d Out of req=%p\n", |
622 | skdev->name, __func__, __LINE__, q); | |
e67f86b3 AB |
623 | break; |
624 | } | |
625 | SKD_ASSERT(skreq->state == SKD_REQ_STATE_IDLE); | |
626 | SKD_ASSERT((skreq->id & SKD_ID_INCR) == 0); | |
627 | ||
628 | /* Now we check to see if we can get a fit msg */ | |
629 | if (skmsg == NULL) { | |
630 | if (skdev->skmsg_free_list == NULL) { | |
2e44b427 | 631 | pr_debug("%s:%s:%d Out of msg\n", |
632 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
633 | break; |
634 | } | |
635 | } | |
636 | ||
637 | skreq->flush_cmd = 0; | |
638 | skreq->n_sg = 0; | |
639 | skreq->sg_byte_count = 0; | |
e67f86b3 AB |
640 | |
641 | /* | |
38d4a1bb | 642 | * OK to now dequeue request from q. |
e67f86b3 AB |
643 | * |
644 | * At this point we are comitted to either start or reject | |
645 | * the native request. Note that skd_request_context is | |
646 | * available but is still at the head of the free list. | |
647 | */ | |
fcd37eb3 JA |
648 | blk_start_request(req); |
649 | skreq->req = req; | |
650 | skreq->fitmsg_id = 0; | |
e67f86b3 AB |
651 | |
652 | /* Either a FIT msg is in progress or we have to start one. */ | |
653 | if (skmsg == NULL) { | |
654 | /* Are there any FIT msg buffers available? */ | |
655 | skmsg = skdev->skmsg_free_list; | |
656 | if (skmsg == NULL) { | |
2e44b427 | 657 | pr_debug("%s:%s:%d Out of msg skdev=%p\n", |
658 | skdev->name, __func__, __LINE__, | |
659 | skdev); | |
e67f86b3 AB |
660 | break; |
661 | } | |
662 | SKD_ASSERT(skmsg->state == SKD_MSG_STATE_IDLE); | |
663 | SKD_ASSERT((skmsg->id & SKD_ID_INCR) == 0); | |
664 | ||
665 | skdev->skmsg_free_list = skmsg->next; | |
666 | ||
667 | skmsg->state = SKD_MSG_STATE_BUSY; | |
668 | skmsg->id += SKD_ID_INCR; | |
669 | ||
670 | /* Initialize the FIT msg header */ | |
671 | fmh = (struct fit_msg_hdr *)skmsg->msg_buf; | |
672 | memset(fmh, 0, sizeof(*fmh)); | |
673 | fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; | |
674 | skmsg->length = sizeof(*fmh); | |
675 | } | |
676 | ||
677 | skreq->fitmsg_id = skmsg->id; | |
678 | ||
679 | /* | |
680 | * Note that a FIT msg may have just been started | |
681 | * but contains no SoFIT requests yet. | |
682 | */ | |
683 | ||
684 | /* | |
685 | * Transcode the request, checking as we go. The outcome of | |
686 | * the transcoding is represented by the error variable. | |
687 | */ | |
688 | cmd_ptr = &skmsg->msg_buf[skmsg->length]; | |
689 | memset(cmd_ptr, 0, 32); | |
690 | ||
691 | be_lba = cpu_to_be32(lba); | |
692 | be_count = cpu_to_be32(count); | |
693 | be_dmaa = cpu_to_be64((u64)skreq->sksg_dma_address); | |
694 | cmdctxt = skreq->id + SKD_ID_INCR; | |
695 | ||
696 | scsi_req = cmd_ptr; | |
697 | scsi_req->hdr.tag = cmdctxt; | |
698 | scsi_req->hdr.sg_list_dma_address = be_dmaa; | |
699 | ||
700 | if (data_dir == READ) | |
701 | skreq->sg_data_dir = SKD_DATA_DIR_CARD_TO_HOST; | |
702 | else | |
703 | skreq->sg_data_dir = SKD_DATA_DIR_HOST_TO_CARD; | |
704 | ||
49bdedb3 | 705 | if (flush == SKD_FLUSH_ZERO_SIZE_FIRST) { |
e67f86b3 AB |
706 | skd_prep_zerosize_flush_cdb(scsi_req, skreq); |
707 | SKD_ASSERT(skreq->flush_cmd == 1); | |
708 | ||
709 | } else { | |
710 | skd_prep_rw_cdb(scsi_req, data_dir, lba, count); | |
711 | } | |
712 | ||
713 | if (fua) | |
714 | scsi_req->cdb[1] |= SKD_FUA_NV; | |
715 | ||
fcd37eb3 | 716 | if (!req->bio) |
e67f86b3 AB |
717 | goto skip_sg; |
718 | ||
719 | error = skd_preop_sg_list(skdev, skreq); | |
720 | ||
721 | if (error != 0) { | |
722 | /* | |
723 | * Complete the native request with error. | |
724 | * Note that the request context is still at the | |
725 | * head of the free list, and that the SoFIT request | |
726 | * was encoded into the FIT msg buffer but the FIT | |
727 | * msg length has not been updated. In short, the | |
728 | * only resource that has been allocated but might | |
729 | * not be used is that the FIT msg could be empty. | |
730 | */ | |
2e44b427 | 731 | pr_debug("%s:%s:%d error Out\n", |
732 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
733 | skd_end_request(skdev, skreq, error); |
734 | continue; | |
735 | } | |
736 | ||
737 | skip_sg: | |
738 | scsi_req->hdr.sg_list_len_bytes = | |
739 | cpu_to_be32(skreq->sg_byte_count); | |
740 | ||
741 | /* Complete resource allocations. */ | |
742 | skdev->skreq_free_list = skreq->next; | |
743 | skreq->state = SKD_REQ_STATE_BUSY; | |
744 | skreq->id += SKD_ID_INCR; | |
745 | ||
746 | skmsg->length += sizeof(struct skd_scsi_request); | |
747 | fmh->num_protocol_cmds_coalesced++; | |
748 | ||
749 | /* | |
750 | * Update the active request counts. | |
751 | * Capture the timeout timestamp. | |
752 | */ | |
753 | skreq->timeout_stamp = skdev->timeout_stamp; | |
754 | timo_slot = skreq->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; | |
755 | skdev->timeout_slot[timo_slot]++; | |
756 | skdev->in_flight++; | |
2e44b427 | 757 | pr_debug("%s:%s:%d req=0x%x busy=%d\n", |
758 | skdev->name, __func__, __LINE__, | |
759 | skreq->id, skdev->in_flight); | |
e67f86b3 AB |
760 | |
761 | /* | |
762 | * If the FIT msg buffer is full send it. | |
763 | */ | |
764 | if (skmsg->length >= SKD_N_FITMSG_BYTES || | |
765 | fmh->num_protocol_cmds_coalesced >= skd_max_req_per_msg) { | |
766 | skd_send_fitmsg(skdev, skmsg); | |
767 | skmsg = NULL; | |
768 | fmh = NULL; | |
769 | } | |
770 | } | |
771 | ||
772 | /* | |
773 | * Is a FIT msg in progress? If it is empty put the buffer back | |
774 | * on the free list. If it is non-empty send what we got. | |
775 | * This minimizes latency when there are fewer requests than | |
776 | * what fits in a FIT msg. | |
777 | */ | |
778 | if (skmsg != NULL) { | |
779 | /* Bigger than just a FIT msg header? */ | |
780 | if (skmsg->length > sizeof(struct fit_msg_hdr)) { | |
2e44b427 | 781 | pr_debug("%s:%s:%d sending msg=%p, len %d\n", |
782 | skdev->name, __func__, __LINE__, | |
783 | skmsg, skmsg->length); | |
e67f86b3 AB |
784 | skd_send_fitmsg(skdev, skmsg); |
785 | } else { | |
786 | /* | |
787 | * The FIT msg is empty. It means we got started | |
788 | * on the msg, but the requests were rejected. | |
789 | */ | |
790 | skmsg->state = SKD_MSG_STATE_IDLE; | |
791 | skmsg->id += SKD_ID_INCR; | |
792 | skmsg->next = skdev->skmsg_free_list; | |
793 | skdev->skmsg_free_list = skmsg; | |
794 | } | |
795 | skmsg = NULL; | |
796 | fmh = NULL; | |
797 | } | |
798 | ||
799 | /* | |
800 | * If req is non-NULL it means there is something to do but | |
801 | * we are out of a resource. | |
802 | */ | |
fcd37eb3 | 803 | if (req) |
6a5ec65b | 804 | blk_stop_queue(skdev->queue); |
e67f86b3 AB |
805 | } |
806 | ||
38d4a1bb MS |
807 | static void skd_end_request(struct skd_device *skdev, |
808 | struct skd_request_context *skreq, int error) | |
e67f86b3 | 809 | { |
e67f86b3 AB |
810 | if (unlikely(error)) { |
811 | struct request *req = skreq->req; | |
812 | char *cmd = (rq_data_dir(req) == READ) ? "read" : "write"; | |
813 | u32 lba = (u32)blk_rq_pos(req); | |
814 | u32 count = blk_rq_sectors(req); | |
815 | ||
816 | pr_err("(%s): Error cmd=%s sect=%u count=%u id=0x%x\n", | |
817 | skd_name(skdev), cmd, lba, count, skreq->id); | |
818 | } else | |
2e44b427 | 819 | pr_debug("%s:%s:%d id=0x%x error=%d\n", |
820 | skdev->name, __func__, __LINE__, skreq->id, error); | |
e67f86b3 AB |
821 | |
822 | __blk_end_request_all(skreq->req, error); | |
823 | } | |
824 | ||
fcd37eb3 | 825 | static int skd_preop_sg_list(struct skd_device *skdev, |
38d4a1bb | 826 | struct skd_request_context *skreq) |
e67f86b3 AB |
827 | { |
828 | struct request *req = skreq->req; | |
829 | int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD; | |
830 | int pci_dir = writing ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE; | |
831 | struct scatterlist *sg = &skreq->sg[0]; | |
832 | int n_sg; | |
833 | int i; | |
834 | ||
835 | skreq->sg_byte_count = 0; | |
836 | ||
837 | /* SKD_ASSERT(skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD || | |
838 | skreq->sg_data_dir == SKD_DATA_DIR_CARD_TO_HOST); */ | |
839 | ||
840 | n_sg = blk_rq_map_sg(skdev->queue, req, sg); | |
841 | if (n_sg <= 0) | |
842 | return -EINVAL; | |
843 | ||
844 | /* | |
845 | * Map scatterlist to PCI bus addresses. | |
846 | * Note PCI might change the number of entries. | |
847 | */ | |
848 | n_sg = pci_map_sg(skdev->pdev, sg, n_sg, pci_dir); | |
849 | if (n_sg <= 0) | |
850 | return -EINVAL; | |
851 | ||
852 | SKD_ASSERT(n_sg <= skdev->sgs_per_request); | |
853 | ||
854 | skreq->n_sg = n_sg; | |
855 | ||
856 | for (i = 0; i < n_sg; i++) { | |
857 | struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; | |
858 | u32 cnt = sg_dma_len(&sg[i]); | |
859 | uint64_t dma_addr = sg_dma_address(&sg[i]); | |
860 | ||
861 | sgd->control = FIT_SGD_CONTROL_NOT_LAST; | |
862 | sgd->byte_count = cnt; | |
863 | skreq->sg_byte_count += cnt; | |
864 | sgd->host_side_addr = dma_addr; | |
865 | sgd->dev_side_addr = 0; | |
866 | } | |
867 | ||
868 | skreq->sksg_list[n_sg - 1].next_desc_ptr = 0LL; | |
869 | skreq->sksg_list[n_sg - 1].control = FIT_SGD_CONTROL_LAST; | |
870 | ||
871 | if (unlikely(skdev->dbg_level > 1)) { | |
2e44b427 | 872 | pr_debug("%s:%s:%d skreq=%x sksg_list=%p sksg_dma=%llx\n", |
873 | skdev->name, __func__, __LINE__, | |
874 | skreq->id, skreq->sksg_list, skreq->sksg_dma_address); | |
e67f86b3 AB |
875 | for (i = 0; i < n_sg; i++) { |
876 | struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; | |
2e44b427 | 877 | pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " |
878 | "addr=0x%llx next=0x%llx\n", | |
879 | skdev->name, __func__, __LINE__, | |
880 | i, sgd->byte_count, sgd->control, | |
881 | sgd->host_side_addr, sgd->next_desc_ptr); | |
e67f86b3 AB |
882 | } |
883 | } | |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
fcd37eb3 | 888 | static void skd_postop_sg_list(struct skd_device *skdev, |
38d4a1bb | 889 | struct skd_request_context *skreq) |
e67f86b3 AB |
890 | { |
891 | int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD; | |
892 | int pci_dir = writing ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE; | |
893 | ||
894 | /* | |
895 | * restore the next ptr for next IO request so we | |
896 | * don't have to set it every time. | |
897 | */ | |
898 | skreq->sksg_list[skreq->n_sg - 1].next_desc_ptr = | |
899 | skreq->sksg_dma_address + | |
900 | ((skreq->n_sg) * sizeof(struct fit_sg_descriptor)); | |
901 | pci_unmap_sg(skdev->pdev, &skreq->sg[0], skreq->n_sg, pci_dir); | |
902 | } | |
903 | ||
e67f86b3 AB |
904 | static void skd_request_fn_not_online(struct request_queue *q) |
905 | { | |
906 | struct skd_device *skdev = q->queuedata; | |
907 | int error; | |
908 | ||
909 | SKD_ASSERT(skdev->state != SKD_DRVR_STATE_ONLINE); | |
910 | ||
911 | skd_log_skdev(skdev, "req_not_online"); | |
912 | switch (skdev->state) { | |
913 | case SKD_DRVR_STATE_PAUSING: | |
914 | case SKD_DRVR_STATE_PAUSED: | |
915 | case SKD_DRVR_STATE_STARTING: | |
916 | case SKD_DRVR_STATE_RESTARTING: | |
917 | case SKD_DRVR_STATE_WAIT_BOOT: | |
918 | /* In case of starting, we haven't started the queue, | |
919 | * so we can't get here... but requests are | |
920 | * possibly hanging out waiting for us because we | |
921 | * reported the dev/skd0 already. They'll wait | |
922 | * forever if connect doesn't complete. | |
923 | * What to do??? delay dev/skd0 ?? | |
924 | */ | |
925 | case SKD_DRVR_STATE_BUSY: | |
926 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
927 | case SKD_DRVR_STATE_BUSY_ERASE: | |
928 | case SKD_DRVR_STATE_DRAINING_TIMEOUT: | |
929 | return; | |
930 | ||
931 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
932 | case SKD_DRVR_STATE_STOPPING: | |
933 | case SKD_DRVR_STATE_SYNCING: | |
934 | case SKD_DRVR_STATE_FAULT: | |
935 | case SKD_DRVR_STATE_DISAPPEARED: | |
936 | default: | |
937 | error = -EIO; | |
938 | break; | |
939 | } | |
940 | ||
941 | /* If we get here, terminate all pending block requeusts | |
942 | * with EIO and any scsi pass thru with appropriate sense | |
943 | */ | |
944 | ||
945 | skd_fail_all_pending(skdev); | |
946 | } | |
947 | ||
948 | /* | |
949 | ***************************************************************************** | |
950 | * TIMER | |
951 | ***************************************************************************** | |
952 | */ | |
953 | ||
954 | static void skd_timer_tick_not_online(struct skd_device *skdev); | |
955 | ||
956 | static void skd_timer_tick(ulong arg) | |
957 | { | |
958 | struct skd_device *skdev = (struct skd_device *)arg; | |
959 | ||
960 | u32 timo_slot; | |
961 | u32 overdue_timestamp; | |
962 | unsigned long reqflags; | |
963 | u32 state; | |
964 | ||
965 | if (skdev->state == SKD_DRVR_STATE_FAULT) | |
966 | /* The driver has declared fault, and we want it to | |
967 | * stay that way until driver is reloaded. | |
968 | */ | |
969 | return; | |
970 | ||
971 | spin_lock_irqsave(&skdev->lock, reqflags); | |
972 | ||
973 | state = SKD_READL(skdev, FIT_STATUS); | |
974 | state &= FIT_SR_DRIVE_STATE_MASK; | |
975 | if (state != skdev->drive_state) | |
976 | skd_isr_fwstate(skdev); | |
977 | ||
978 | if (skdev->state != SKD_DRVR_STATE_ONLINE) { | |
979 | skd_timer_tick_not_online(skdev); | |
980 | goto timer_func_out; | |
981 | } | |
982 | skdev->timeout_stamp++; | |
983 | timo_slot = skdev->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; | |
984 | ||
985 | /* | |
986 | * All requests that happened during the previous use of | |
987 | * this slot should be done by now. The previous use was | |
988 | * over 7 seconds ago. | |
989 | */ | |
990 | if (skdev->timeout_slot[timo_slot] == 0) | |
991 | goto timer_func_out; | |
992 | ||
993 | /* Something is overdue */ | |
994 | overdue_timestamp = skdev->timeout_stamp - SKD_N_TIMEOUT_SLOT; | |
995 | ||
2e44b427 | 996 | pr_debug("%s:%s:%d found %d timeouts, draining busy=%d\n", |
997 | skdev->name, __func__, __LINE__, | |
998 | skdev->timeout_slot[timo_slot], skdev->in_flight); | |
e67f86b3 AB |
999 | pr_err("(%s): Overdue IOs (%d), busy %d\n", |
1000 | skd_name(skdev), skdev->timeout_slot[timo_slot], | |
1001 | skdev->in_flight); | |
1002 | ||
1003 | skdev->timer_countdown = SKD_DRAINING_TIMO; | |
1004 | skdev->state = SKD_DRVR_STATE_DRAINING_TIMEOUT; | |
1005 | skdev->timo_slot = timo_slot; | |
6a5ec65b | 1006 | blk_stop_queue(skdev->queue); |
e67f86b3 AB |
1007 | |
1008 | timer_func_out: | |
1009 | mod_timer(&skdev->timer, (jiffies + HZ)); | |
1010 | ||
1011 | spin_unlock_irqrestore(&skdev->lock, reqflags); | |
1012 | } | |
1013 | ||
1014 | static void skd_timer_tick_not_online(struct skd_device *skdev) | |
1015 | { | |
1016 | switch (skdev->state) { | |
1017 | case SKD_DRVR_STATE_IDLE: | |
1018 | case SKD_DRVR_STATE_LOAD: | |
1019 | break; | |
1020 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
2e44b427 | 1021 | pr_debug("%s:%s:%d drive busy sanitize[%x], driver[%x]\n", |
1022 | skdev->name, __func__, __LINE__, | |
1023 | skdev->drive_state, skdev->state); | |
e67f86b3 AB |
1024 | /* If we've been in sanitize for 3 seconds, we figure we're not |
1025 | * going to get anymore completions, so recover requests now | |
1026 | */ | |
1027 | if (skdev->timer_countdown > 0) { | |
1028 | skdev->timer_countdown--; | |
1029 | return; | |
1030 | } | |
1031 | skd_recover_requests(skdev, 0); | |
1032 | break; | |
1033 | ||
1034 | case SKD_DRVR_STATE_BUSY: | |
1035 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
1036 | case SKD_DRVR_STATE_BUSY_ERASE: | |
2e44b427 | 1037 | pr_debug("%s:%s:%d busy[%x], countdown=%d\n", |
1038 | skdev->name, __func__, __LINE__, | |
1039 | skdev->state, skdev->timer_countdown); | |
e67f86b3 AB |
1040 | if (skdev->timer_countdown > 0) { |
1041 | skdev->timer_countdown--; | |
1042 | return; | |
1043 | } | |
2e44b427 | 1044 | pr_debug("%s:%s:%d busy[%x], timedout=%d, restarting device.", |
1045 | skdev->name, __func__, __LINE__, | |
1046 | skdev->state, skdev->timer_countdown); | |
e67f86b3 AB |
1047 | skd_restart_device(skdev); |
1048 | break; | |
1049 | ||
1050 | case SKD_DRVR_STATE_WAIT_BOOT: | |
1051 | case SKD_DRVR_STATE_STARTING: | |
1052 | if (skdev->timer_countdown > 0) { | |
1053 | skdev->timer_countdown--; | |
1054 | return; | |
1055 | } | |
1056 | /* For now, we fault the drive. Could attempt resets to | |
1057 | * revcover at some point. */ | |
1058 | skdev->state = SKD_DRVR_STATE_FAULT; | |
1059 | ||
1060 | pr_err("(%s): DriveFault Connect Timeout (%x)\n", | |
1061 | skd_name(skdev), skdev->drive_state); | |
1062 | ||
1063 | /*start the queue so we can respond with error to requests */ | |
1064 | /* wakeup anyone waiting for startup complete */ | |
6a5ec65b | 1065 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
1066 | skdev->gendisk_on = -1; |
1067 | wake_up_interruptible(&skdev->waitq); | |
1068 | break; | |
1069 | ||
1070 | case SKD_DRVR_STATE_ONLINE: | |
1071 | /* shouldn't get here. */ | |
1072 | break; | |
1073 | ||
1074 | case SKD_DRVR_STATE_PAUSING: | |
1075 | case SKD_DRVR_STATE_PAUSED: | |
1076 | break; | |
1077 | ||
1078 | case SKD_DRVR_STATE_DRAINING_TIMEOUT: | |
2e44b427 | 1079 | pr_debug("%s:%s:%d " |
1080 | "draining busy [%d] tick[%d] qdb[%d] tmls[%d]\n", | |
1081 | skdev->name, __func__, __LINE__, | |
1082 | skdev->timo_slot, | |
1083 | skdev->timer_countdown, | |
1084 | skdev->in_flight, | |
1085 | skdev->timeout_slot[skdev->timo_slot]); | |
e67f86b3 AB |
1086 | /* if the slot has cleared we can let the I/O continue */ |
1087 | if (skdev->timeout_slot[skdev->timo_slot] == 0) { | |
2e44b427 | 1088 | pr_debug("%s:%s:%d Slot drained, starting queue.\n", |
1089 | skdev->name, __func__, __LINE__); | |
e67f86b3 | 1090 | skdev->state = SKD_DRVR_STATE_ONLINE; |
6a5ec65b | 1091 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
1092 | return; |
1093 | } | |
1094 | if (skdev->timer_countdown > 0) { | |
1095 | skdev->timer_countdown--; | |
1096 | return; | |
1097 | } | |
1098 | skd_restart_device(skdev); | |
1099 | break; | |
1100 | ||
1101 | case SKD_DRVR_STATE_RESTARTING: | |
1102 | if (skdev->timer_countdown > 0) { | |
1103 | skdev->timer_countdown--; | |
1104 | return; | |
1105 | } | |
1106 | /* For now, we fault the drive. Could attempt resets to | |
1107 | * revcover at some point. */ | |
1108 | skdev->state = SKD_DRVR_STATE_FAULT; | |
1109 | pr_err("(%s): DriveFault Reconnect Timeout (%x)\n", | |
1110 | skd_name(skdev), skdev->drive_state); | |
1111 | ||
1112 | /* | |
1113 | * Recovering does two things: | |
1114 | * 1. completes IO with error | |
1115 | * 2. reclaims dma resources | |
1116 | * When is it safe to recover requests? | |
1117 | * - if the drive state is faulted | |
1118 | * - if the state is still soft reset after out timeout | |
1119 | * - if the drive registers are dead (state = FF) | |
1120 | * If it is "unsafe", we still need to recover, so we will | |
1121 | * disable pci bus mastering and disable our interrupts. | |
1122 | */ | |
1123 | ||
1124 | if ((skdev->drive_state == FIT_SR_DRIVE_SOFT_RESET) || | |
1125 | (skdev->drive_state == FIT_SR_DRIVE_FAULT) || | |
1126 | (skdev->drive_state == FIT_SR_DRIVE_STATE_MASK)) | |
1127 | /* It never came out of soft reset. Try to | |
1128 | * recover the requests and then let them | |
1129 | * fail. This is to mitigate hung processes. */ | |
1130 | skd_recover_requests(skdev, 0); | |
1131 | else { | |
1132 | pr_err("(%s): Disable BusMaster (%x)\n", | |
1133 | skd_name(skdev), skdev->drive_state); | |
1134 | pci_disable_device(skdev->pdev); | |
1135 | skd_disable_interrupts(skdev); | |
1136 | skd_recover_requests(skdev, 0); | |
1137 | } | |
1138 | ||
1139 | /*start the queue so we can respond with error to requests */ | |
1140 | /* wakeup anyone waiting for startup complete */ | |
6a5ec65b | 1141 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
1142 | skdev->gendisk_on = -1; |
1143 | wake_up_interruptible(&skdev->waitq); | |
1144 | break; | |
1145 | ||
1146 | case SKD_DRVR_STATE_RESUMING: | |
1147 | case SKD_DRVR_STATE_STOPPING: | |
1148 | case SKD_DRVR_STATE_SYNCING: | |
1149 | case SKD_DRVR_STATE_FAULT: | |
1150 | case SKD_DRVR_STATE_DISAPPEARED: | |
1151 | default: | |
1152 | break; | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | static int skd_start_timer(struct skd_device *skdev) | |
1157 | { | |
1158 | int rc; | |
1159 | ||
1160 | init_timer(&skdev->timer); | |
1161 | setup_timer(&skdev->timer, skd_timer_tick, (ulong)skdev); | |
1162 | ||
1163 | rc = mod_timer(&skdev->timer, (jiffies + HZ)); | |
1164 | if (rc) | |
1165 | pr_err("%s: failed to start timer %d\n", | |
1166 | __func__, rc); | |
1167 | return rc; | |
1168 | } | |
1169 | ||
1170 | static void skd_kill_timer(struct skd_device *skdev) | |
1171 | { | |
1172 | del_timer_sync(&skdev->timer); | |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | ***************************************************************************** | |
1177 | * IOCTL | |
1178 | ***************************************************************************** | |
1179 | */ | |
1180 | static int skd_ioctl_sg_io(struct skd_device *skdev, | |
1181 | fmode_t mode, void __user *argp); | |
1182 | static int skd_sg_io_get_and_check_args(struct skd_device *skdev, | |
1183 | struct skd_sg_io *sksgio); | |
1184 | static int skd_sg_io_obtain_skspcl(struct skd_device *skdev, | |
1185 | struct skd_sg_io *sksgio); | |
1186 | static int skd_sg_io_prep_buffering(struct skd_device *skdev, | |
1187 | struct skd_sg_io *sksgio); | |
1188 | static int skd_sg_io_copy_buffer(struct skd_device *skdev, | |
1189 | struct skd_sg_io *sksgio, int dxfer_dir); | |
1190 | static int skd_sg_io_send_fitmsg(struct skd_device *skdev, | |
1191 | struct skd_sg_io *sksgio); | |
1192 | static int skd_sg_io_await(struct skd_device *skdev, struct skd_sg_io *sksgio); | |
1193 | static int skd_sg_io_release_skspcl(struct skd_device *skdev, | |
1194 | struct skd_sg_io *sksgio); | |
1195 | static int skd_sg_io_put_status(struct skd_device *skdev, | |
1196 | struct skd_sg_io *sksgio); | |
1197 | ||
1198 | static void skd_complete_special(struct skd_device *skdev, | |
1199 | volatile struct fit_completion_entry_v1 | |
1200 | *skcomp, | |
1201 | volatile struct fit_comp_error_info *skerr, | |
1202 | struct skd_special_context *skspcl); | |
1203 | ||
1204 | static int skd_bdev_ioctl(struct block_device *bdev, fmode_t mode, | |
1205 | uint cmd_in, ulong arg) | |
1206 | { | |
1207 | int rc = 0; | |
1208 | struct gendisk *disk = bdev->bd_disk; | |
1209 | struct skd_device *skdev = disk->private_data; | |
1210 | void __user *p = (void *)arg; | |
1211 | ||
2e44b427 | 1212 | pr_debug("%s:%s:%d %s: CMD[%s] ioctl mode 0x%x, cmd 0x%x arg %0lx\n", |
1213 | skdev->name, __func__, __LINE__, | |
1214 | disk->disk_name, current->comm, mode, cmd_in, arg); | |
e67f86b3 AB |
1215 | |
1216 | if (!capable(CAP_SYS_ADMIN)) | |
1217 | return -EPERM; | |
1218 | ||
1219 | switch (cmd_in) { | |
1220 | case SG_SET_TIMEOUT: | |
1221 | case SG_GET_TIMEOUT: | |
1222 | case SG_GET_VERSION_NUM: | |
1223 | rc = scsi_cmd_ioctl(disk->queue, disk, mode, cmd_in, p); | |
1224 | break; | |
1225 | case SG_IO: | |
1226 | rc = skd_ioctl_sg_io(skdev, mode, p); | |
1227 | break; | |
1228 | ||
1229 | default: | |
1230 | rc = -ENOTTY; | |
1231 | break; | |
1232 | } | |
1233 | ||
2e44b427 | 1234 | pr_debug("%s:%s:%d %s: completion rc %d\n", |
1235 | skdev->name, __func__, __LINE__, disk->disk_name, rc); | |
e67f86b3 AB |
1236 | return rc; |
1237 | } | |
1238 | ||
1239 | static int skd_ioctl_sg_io(struct skd_device *skdev, fmode_t mode, | |
1240 | void __user *argp) | |
1241 | { | |
1242 | int rc; | |
1243 | struct skd_sg_io sksgio; | |
1244 | ||
1245 | memset(&sksgio, 0, sizeof(sksgio)); | |
1246 | sksgio.mode = mode; | |
1247 | sksgio.argp = argp; | |
1248 | sksgio.iov = &sksgio.no_iov_iov; | |
1249 | ||
1250 | switch (skdev->state) { | |
1251 | case SKD_DRVR_STATE_ONLINE: | |
1252 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
1253 | break; | |
1254 | ||
1255 | default: | |
2e44b427 | 1256 | pr_debug("%s:%s:%d drive not online\n", |
1257 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
1258 | rc = -ENXIO; |
1259 | goto out; | |
1260 | } | |
1261 | ||
f721bb0d AB |
1262 | rc = skd_sg_io_get_and_check_args(skdev, &sksgio); |
1263 | if (rc) | |
1264 | goto out; | |
1265 | ||
1266 | rc = skd_sg_io_obtain_skspcl(skdev, &sksgio); | |
1267 | if (rc) | |
1268 | goto out; | |
1269 | ||
1270 | rc = skd_sg_io_prep_buffering(skdev, &sksgio); | |
1271 | if (rc) | |
1272 | goto out; | |
1273 | ||
1274 | rc = skd_sg_io_copy_buffer(skdev, &sksgio, SG_DXFER_TO_DEV); | |
1275 | if (rc) | |
e67f86b3 AB |
1276 | goto out; |
1277 | ||
f721bb0d AB |
1278 | rc = skd_sg_io_send_fitmsg(skdev, &sksgio); |
1279 | if (rc) | |
e67f86b3 AB |
1280 | goto out; |
1281 | ||
f721bb0d AB |
1282 | rc = skd_sg_io_await(skdev, &sksgio); |
1283 | if (rc) | |
1284 | goto out; | |
1285 | ||
1286 | rc = skd_sg_io_copy_buffer(skdev, &sksgio, SG_DXFER_FROM_DEV); | |
1287 | if (rc) | |
1288 | goto out; | |
1289 | ||
1290 | rc = skd_sg_io_put_status(skdev, &sksgio); | |
1291 | if (rc) | |
e67f86b3 AB |
1292 | goto out; |
1293 | ||
1294 | rc = 0; | |
1295 | ||
1296 | out: | |
1297 | skd_sg_io_release_skspcl(skdev, &sksgio); | |
1298 | ||
1299 | if (sksgio.iov != NULL && sksgio.iov != &sksgio.no_iov_iov) | |
1300 | kfree(sksgio.iov); | |
1301 | return rc; | |
1302 | } | |
1303 | ||
1304 | static int skd_sg_io_get_and_check_args(struct skd_device *skdev, | |
1305 | struct skd_sg_io *sksgio) | |
1306 | { | |
1307 | struct sg_io_hdr *sgp = &sksgio->sg; | |
1308 | int i, acc; | |
1309 | ||
1310 | if (!access_ok(VERIFY_WRITE, sksgio->argp, sizeof(sg_io_hdr_t))) { | |
2e44b427 | 1311 | pr_debug("%s:%s:%d access sg failed %p\n", |
1312 | skdev->name, __func__, __LINE__, sksgio->argp); | |
e67f86b3 AB |
1313 | return -EFAULT; |
1314 | } | |
1315 | ||
1316 | if (__copy_from_user(sgp, sksgio->argp, sizeof(sg_io_hdr_t))) { | |
2e44b427 | 1317 | pr_debug("%s:%s:%d copy_from_user sg failed %p\n", |
1318 | skdev->name, __func__, __LINE__, sksgio->argp); | |
e67f86b3 AB |
1319 | return -EFAULT; |
1320 | } | |
1321 | ||
1322 | if (sgp->interface_id != SG_INTERFACE_ID_ORIG) { | |
2e44b427 | 1323 | pr_debug("%s:%s:%d interface_id invalid 0x%x\n", |
1324 | skdev->name, __func__, __LINE__, sgp->interface_id); | |
e67f86b3 AB |
1325 | return -EINVAL; |
1326 | } | |
1327 | ||
1328 | if (sgp->cmd_len > sizeof(sksgio->cdb)) { | |
2e44b427 | 1329 | pr_debug("%s:%s:%d cmd_len invalid %d\n", |
1330 | skdev->name, __func__, __LINE__, sgp->cmd_len); | |
e67f86b3 AB |
1331 | return -EINVAL; |
1332 | } | |
1333 | ||
1334 | if (sgp->iovec_count > 256) { | |
2e44b427 | 1335 | pr_debug("%s:%s:%d iovec_count invalid %d\n", |
1336 | skdev->name, __func__, __LINE__, sgp->iovec_count); | |
e67f86b3 AB |
1337 | return -EINVAL; |
1338 | } | |
1339 | ||
1340 | if (sgp->dxfer_len > (PAGE_SIZE * SKD_N_SG_PER_SPECIAL)) { | |
2e44b427 | 1341 | pr_debug("%s:%s:%d dxfer_len invalid %d\n", |
1342 | skdev->name, __func__, __LINE__, sgp->dxfer_len); | |
e67f86b3 AB |
1343 | return -EINVAL; |
1344 | } | |
1345 | ||
1346 | switch (sgp->dxfer_direction) { | |
1347 | case SG_DXFER_NONE: | |
1348 | acc = -1; | |
1349 | break; | |
1350 | ||
1351 | case SG_DXFER_TO_DEV: | |
1352 | acc = VERIFY_READ; | |
1353 | break; | |
1354 | ||
1355 | case SG_DXFER_FROM_DEV: | |
1356 | case SG_DXFER_TO_FROM_DEV: | |
1357 | acc = VERIFY_WRITE; | |
1358 | break; | |
1359 | ||
1360 | default: | |
2e44b427 | 1361 | pr_debug("%s:%s:%d dxfer_dir invalid %d\n", |
1362 | skdev->name, __func__, __LINE__, sgp->dxfer_direction); | |
e67f86b3 AB |
1363 | return -EINVAL; |
1364 | } | |
1365 | ||
1366 | if (copy_from_user(sksgio->cdb, sgp->cmdp, sgp->cmd_len)) { | |
2e44b427 | 1367 | pr_debug("%s:%s:%d copy_from_user cmdp failed %p\n", |
1368 | skdev->name, __func__, __LINE__, sgp->cmdp); | |
e67f86b3 AB |
1369 | return -EFAULT; |
1370 | } | |
1371 | ||
1372 | if (sgp->mx_sb_len != 0) { | |
1373 | if (!access_ok(VERIFY_WRITE, sgp->sbp, sgp->mx_sb_len)) { | |
2e44b427 | 1374 | pr_debug("%s:%s:%d access sbp failed %p\n", |
1375 | skdev->name, __func__, __LINE__, sgp->sbp); | |
e67f86b3 AB |
1376 | return -EFAULT; |
1377 | } | |
1378 | } | |
1379 | ||
1380 | if (sgp->iovec_count == 0) { | |
1381 | sksgio->iov[0].iov_base = sgp->dxferp; | |
1382 | sksgio->iov[0].iov_len = sgp->dxfer_len; | |
1383 | sksgio->iovcnt = 1; | |
1384 | sksgio->dxfer_len = sgp->dxfer_len; | |
1385 | } else { | |
1386 | struct sg_iovec *iov; | |
1387 | uint nbytes = sizeof(*iov) * sgp->iovec_count; | |
1388 | size_t iov_data_len; | |
1389 | ||
1390 | iov = kmalloc(nbytes, GFP_KERNEL); | |
1391 | if (iov == NULL) { | |
2e44b427 | 1392 | pr_debug("%s:%s:%d alloc iovec failed %d\n", |
1393 | skdev->name, __func__, __LINE__, | |
1394 | sgp->iovec_count); | |
e67f86b3 AB |
1395 | return -ENOMEM; |
1396 | } | |
1397 | sksgio->iov = iov; | |
1398 | sksgio->iovcnt = sgp->iovec_count; | |
1399 | ||
1400 | if (copy_from_user(iov, sgp->dxferp, nbytes)) { | |
2e44b427 | 1401 | pr_debug("%s:%s:%d copy_from_user iovec failed %p\n", |
1402 | skdev->name, __func__, __LINE__, sgp->dxferp); | |
e67f86b3 AB |
1403 | return -EFAULT; |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * Sum up the vecs, making sure they don't overflow | |
1408 | */ | |
1409 | iov_data_len = 0; | |
1410 | for (i = 0; i < sgp->iovec_count; i++) { | |
1411 | if (iov_data_len + iov[i].iov_len < iov_data_len) | |
1412 | return -EINVAL; | |
1413 | iov_data_len += iov[i].iov_len; | |
1414 | } | |
1415 | ||
1416 | /* SG_IO howto says that the shorter of the two wins */ | |
1417 | if (sgp->dxfer_len < iov_data_len) { | |
1418 | sksgio->iovcnt = iov_shorten((struct iovec *)iov, | |
1419 | sgp->iovec_count, | |
1420 | sgp->dxfer_len); | |
1421 | sksgio->dxfer_len = sgp->dxfer_len; | |
1422 | } else | |
1423 | sksgio->dxfer_len = iov_data_len; | |
1424 | } | |
1425 | ||
1426 | if (sgp->dxfer_direction != SG_DXFER_NONE) { | |
1427 | struct sg_iovec *iov = sksgio->iov; | |
1428 | for (i = 0; i < sksgio->iovcnt; i++, iov++) { | |
1429 | if (!access_ok(acc, iov->iov_base, iov->iov_len)) { | |
2e44b427 | 1430 | pr_debug("%s:%s:%d access data failed %p/%d\n", |
1431 | skdev->name, __func__, __LINE__, | |
1432 | iov->iov_base, (int)iov->iov_len); | |
e67f86b3 AB |
1433 | return -EFAULT; |
1434 | } | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | static int skd_sg_io_obtain_skspcl(struct skd_device *skdev, | |
1442 | struct skd_sg_io *sksgio) | |
1443 | { | |
1444 | struct skd_special_context *skspcl = NULL; | |
1445 | int rc; | |
1446 | ||
38d4a1bb | 1447 | for (;;) { |
e67f86b3 AB |
1448 | ulong flags; |
1449 | ||
1450 | spin_lock_irqsave(&skdev->lock, flags); | |
1451 | skspcl = skdev->skspcl_free_list; | |
1452 | if (skspcl != NULL) { | |
1453 | skdev->skspcl_free_list = | |
1454 | (struct skd_special_context *)skspcl->req.next; | |
1455 | skspcl->req.id += SKD_ID_INCR; | |
1456 | skspcl->req.state = SKD_REQ_STATE_SETUP; | |
1457 | skspcl->orphaned = 0; | |
1458 | skspcl->req.n_sg = 0; | |
1459 | } | |
1460 | spin_unlock_irqrestore(&skdev->lock, flags); | |
1461 | ||
1462 | if (skspcl != NULL) { | |
1463 | rc = 0; | |
1464 | break; | |
1465 | } | |
1466 | ||
2e44b427 | 1467 | pr_debug("%s:%s:%d blocking\n", |
1468 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
1469 | |
1470 | rc = wait_event_interruptible_timeout( | |
1471 | skdev->waitq, | |
1472 | (skdev->skspcl_free_list != NULL), | |
1473 | msecs_to_jiffies(sksgio->sg.timeout)); | |
1474 | ||
2e44b427 | 1475 | pr_debug("%s:%s:%d unblocking, rc=%d\n", |
1476 | skdev->name, __func__, __LINE__, rc); | |
e67f86b3 AB |
1477 | |
1478 | if (rc <= 0) { | |
1479 | if (rc == 0) | |
1480 | rc = -ETIMEDOUT; | |
1481 | else | |
1482 | rc = -EINTR; | |
1483 | break; | |
1484 | } | |
1485 | /* | |
1486 | * If we get here rc > 0 meaning the timeout to | |
1487 | * wait_event_interruptible_timeout() had time left, hence the | |
1488 | * sought event -- non-empty free list -- happened. | |
1489 | * Retry the allocation. | |
1490 | */ | |
1491 | } | |
1492 | sksgio->skspcl = skspcl; | |
1493 | ||
1494 | return rc; | |
1495 | } | |
1496 | ||
1497 | static int skd_skreq_prep_buffering(struct skd_device *skdev, | |
1498 | struct skd_request_context *skreq, | |
1499 | u32 dxfer_len) | |
1500 | { | |
1501 | u32 resid = dxfer_len; | |
1502 | ||
1503 | /* | |
1504 | * The DMA engine must have aligned addresses and byte counts. | |
1505 | */ | |
1506 | resid += (-resid) & 3; | |
1507 | skreq->sg_byte_count = resid; | |
1508 | ||
1509 | skreq->n_sg = 0; | |
1510 | ||
1511 | while (resid > 0) { | |
1512 | u32 nbytes = PAGE_SIZE; | |
1513 | u32 ix = skreq->n_sg; | |
1514 | struct scatterlist *sg = &skreq->sg[ix]; | |
1515 | struct fit_sg_descriptor *sksg = &skreq->sksg_list[ix]; | |
1516 | struct page *page; | |
1517 | ||
1518 | if (nbytes > resid) | |
1519 | nbytes = resid; | |
1520 | ||
1521 | page = alloc_page(GFP_KERNEL); | |
1522 | if (page == NULL) | |
1523 | return -ENOMEM; | |
1524 | ||
1525 | sg_set_page(sg, page, nbytes, 0); | |
1526 | ||
1527 | /* TODO: This should be going through a pci_???() | |
1528 | * routine to do proper mapping. */ | |
1529 | sksg->control = FIT_SGD_CONTROL_NOT_LAST; | |
1530 | sksg->byte_count = nbytes; | |
1531 | ||
1532 | sksg->host_side_addr = sg_phys(sg); | |
1533 | ||
1534 | sksg->dev_side_addr = 0; | |
1535 | sksg->next_desc_ptr = skreq->sksg_dma_address + | |
1536 | (ix + 1) * sizeof(*sksg); | |
1537 | ||
1538 | skreq->n_sg++; | |
1539 | resid -= nbytes; | |
1540 | } | |
1541 | ||
1542 | if (skreq->n_sg > 0) { | |
1543 | u32 ix = skreq->n_sg - 1; | |
1544 | struct fit_sg_descriptor *sksg = &skreq->sksg_list[ix]; | |
1545 | ||
1546 | sksg->control = FIT_SGD_CONTROL_LAST; | |
1547 | sksg->next_desc_ptr = 0; | |
1548 | } | |
1549 | ||
1550 | if (unlikely(skdev->dbg_level > 1)) { | |
1551 | u32 i; | |
1552 | ||
2e44b427 | 1553 | pr_debug("%s:%s:%d skreq=%x sksg_list=%p sksg_dma=%llx\n", |
1554 | skdev->name, __func__, __LINE__, | |
1555 | skreq->id, skreq->sksg_list, skreq->sksg_dma_address); | |
e67f86b3 AB |
1556 | for (i = 0; i < skreq->n_sg; i++) { |
1557 | struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; | |
1558 | ||
2e44b427 | 1559 | pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " |
1560 | "addr=0x%llx next=0x%llx\n", | |
1561 | skdev->name, __func__, __LINE__, | |
1562 | i, sgd->byte_count, sgd->control, | |
1563 | sgd->host_side_addr, sgd->next_desc_ptr); | |
e67f86b3 AB |
1564 | } |
1565 | } | |
1566 | ||
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | static int skd_sg_io_prep_buffering(struct skd_device *skdev, | |
1571 | struct skd_sg_io *sksgio) | |
1572 | { | |
1573 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1574 | struct skd_request_context *skreq = &skspcl->req; | |
1575 | u32 dxfer_len = sksgio->dxfer_len; | |
1576 | int rc; | |
1577 | ||
1578 | rc = skd_skreq_prep_buffering(skdev, skreq, dxfer_len); | |
1579 | /* | |
1580 | * Eventually, errors or not, skd_release_special() is called | |
1581 | * to recover allocations including partial allocations. | |
1582 | */ | |
1583 | return rc; | |
1584 | } | |
1585 | ||
1586 | static int skd_sg_io_copy_buffer(struct skd_device *skdev, | |
1587 | struct skd_sg_io *sksgio, int dxfer_dir) | |
1588 | { | |
1589 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1590 | u32 iov_ix = 0; | |
1591 | struct sg_iovec curiov; | |
1592 | u32 sksg_ix = 0; | |
1593 | u8 *bufp = NULL; | |
1594 | u32 buf_len = 0; | |
1595 | u32 resid = sksgio->dxfer_len; | |
1596 | int rc; | |
1597 | ||
1598 | curiov.iov_len = 0; | |
1599 | curiov.iov_base = NULL; | |
1600 | ||
1601 | if (dxfer_dir != sksgio->sg.dxfer_direction) { | |
1602 | if (dxfer_dir != SG_DXFER_TO_DEV || | |
1603 | sksgio->sg.dxfer_direction != SG_DXFER_TO_FROM_DEV) | |
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | while (resid > 0) { | |
1608 | u32 nbytes = PAGE_SIZE; | |
1609 | ||
1610 | if (curiov.iov_len == 0) { | |
1611 | curiov = sksgio->iov[iov_ix++]; | |
1612 | continue; | |
1613 | } | |
1614 | ||
1615 | if (buf_len == 0) { | |
1616 | struct page *page; | |
1617 | page = sg_page(&skspcl->req.sg[sksg_ix++]); | |
1618 | bufp = page_address(page); | |
1619 | buf_len = PAGE_SIZE; | |
1620 | } | |
1621 | ||
1622 | nbytes = min_t(u32, nbytes, resid); | |
1623 | nbytes = min_t(u32, nbytes, curiov.iov_len); | |
1624 | nbytes = min_t(u32, nbytes, buf_len); | |
1625 | ||
1626 | if (dxfer_dir == SG_DXFER_TO_DEV) | |
1627 | rc = __copy_from_user(bufp, curiov.iov_base, nbytes); | |
1628 | else | |
1629 | rc = __copy_to_user(curiov.iov_base, bufp, nbytes); | |
1630 | ||
1631 | if (rc) | |
1632 | return -EFAULT; | |
1633 | ||
1634 | resid -= nbytes; | |
1635 | curiov.iov_len -= nbytes; | |
1636 | curiov.iov_base += nbytes; | |
1637 | buf_len -= nbytes; | |
1638 | } | |
1639 | ||
1640 | return 0; | |
1641 | } | |
1642 | ||
1643 | static int skd_sg_io_send_fitmsg(struct skd_device *skdev, | |
1644 | struct skd_sg_io *sksgio) | |
1645 | { | |
1646 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1647 | struct fit_msg_hdr *fmh = (struct fit_msg_hdr *)skspcl->msg_buf; | |
1648 | struct skd_scsi_request *scsi_req = (struct skd_scsi_request *)&fmh[1]; | |
1649 | ||
1650 | memset(skspcl->msg_buf, 0, SKD_N_SPECIAL_FITMSG_BYTES); | |
1651 | ||
1652 | /* Initialize the FIT msg header */ | |
1653 | fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; | |
1654 | fmh->num_protocol_cmds_coalesced = 1; | |
1655 | ||
1656 | /* Initialize the SCSI request */ | |
1657 | if (sksgio->sg.dxfer_direction != SG_DXFER_NONE) | |
1658 | scsi_req->hdr.sg_list_dma_address = | |
1659 | cpu_to_be64(skspcl->req.sksg_dma_address); | |
1660 | scsi_req->hdr.tag = skspcl->req.id; | |
1661 | scsi_req->hdr.sg_list_len_bytes = | |
1662 | cpu_to_be32(skspcl->req.sg_byte_count); | |
1663 | memcpy(scsi_req->cdb, sksgio->cdb, sizeof(scsi_req->cdb)); | |
1664 | ||
1665 | skspcl->req.state = SKD_REQ_STATE_BUSY; | |
1666 | skd_send_special_fitmsg(skdev, skspcl); | |
1667 | ||
1668 | return 0; | |
1669 | } | |
1670 | ||
1671 | static int skd_sg_io_await(struct skd_device *skdev, struct skd_sg_io *sksgio) | |
1672 | { | |
1673 | unsigned long flags; | |
1674 | int rc; | |
1675 | ||
1676 | rc = wait_event_interruptible_timeout(skdev->waitq, | |
1677 | (sksgio->skspcl->req.state != | |
1678 | SKD_REQ_STATE_BUSY), | |
1679 | msecs_to_jiffies(sksgio->sg. | |
1680 | timeout)); | |
1681 | ||
1682 | spin_lock_irqsave(&skdev->lock, flags); | |
1683 | ||
1684 | if (sksgio->skspcl->req.state == SKD_REQ_STATE_ABORTED) { | |
2e44b427 | 1685 | pr_debug("%s:%s:%d skspcl %p aborted\n", |
1686 | skdev->name, __func__, __LINE__, sksgio->skspcl); | |
e67f86b3 AB |
1687 | |
1688 | /* Build check cond, sense and let command finish. */ | |
1689 | /* For a timeout, we must fabricate completion and sense | |
1690 | * data to complete the command */ | |
1691 | sksgio->skspcl->req.completion.status = | |
1692 | SAM_STAT_CHECK_CONDITION; | |
1693 | ||
1694 | memset(&sksgio->skspcl->req.err_info, 0, | |
1695 | sizeof(sksgio->skspcl->req.err_info)); | |
1696 | sksgio->skspcl->req.err_info.type = 0x70; | |
1697 | sksgio->skspcl->req.err_info.key = ABORTED_COMMAND; | |
1698 | sksgio->skspcl->req.err_info.code = 0x44; | |
1699 | sksgio->skspcl->req.err_info.qual = 0; | |
1700 | rc = 0; | |
1701 | } else if (sksgio->skspcl->req.state != SKD_REQ_STATE_BUSY) | |
1702 | /* No longer on the adapter. We finish. */ | |
1703 | rc = 0; | |
1704 | else { | |
1705 | /* Something's gone wrong. Still busy. Timeout or | |
1706 | * user interrupted (control-C). Mark as an orphan | |
1707 | * so it will be disposed when completed. */ | |
1708 | sksgio->skspcl->orphaned = 1; | |
1709 | sksgio->skspcl = NULL; | |
1710 | if (rc == 0) { | |
2e44b427 | 1711 | pr_debug("%s:%s:%d timed out %p (%u ms)\n", |
1712 | skdev->name, __func__, __LINE__, | |
1713 | sksgio, sksgio->sg.timeout); | |
e67f86b3 AB |
1714 | rc = -ETIMEDOUT; |
1715 | } else { | |
2e44b427 | 1716 | pr_debug("%s:%s:%d cntlc %p\n", |
1717 | skdev->name, __func__, __LINE__, sksgio); | |
e67f86b3 AB |
1718 | rc = -EINTR; |
1719 | } | |
1720 | } | |
1721 | ||
1722 | spin_unlock_irqrestore(&skdev->lock, flags); | |
1723 | ||
1724 | return rc; | |
1725 | } | |
1726 | ||
1727 | static int skd_sg_io_put_status(struct skd_device *skdev, | |
1728 | struct skd_sg_io *sksgio) | |
1729 | { | |
1730 | struct sg_io_hdr *sgp = &sksgio->sg; | |
1731 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1732 | int resid = 0; | |
1733 | ||
1734 | u32 nb = be32_to_cpu(skspcl->req.completion.num_returned_bytes); | |
1735 | ||
1736 | sgp->status = skspcl->req.completion.status; | |
1737 | resid = sksgio->dxfer_len - nb; | |
1738 | ||
1739 | sgp->masked_status = sgp->status & STATUS_MASK; | |
1740 | sgp->msg_status = 0; | |
1741 | sgp->host_status = 0; | |
1742 | sgp->driver_status = 0; | |
1743 | sgp->resid = resid; | |
1744 | if (sgp->masked_status || sgp->host_status || sgp->driver_status) | |
1745 | sgp->info |= SG_INFO_CHECK; | |
1746 | ||
2e44b427 | 1747 | pr_debug("%s:%s:%d status %x masked %x resid 0x%x\n", |
1748 | skdev->name, __func__, __LINE__, | |
1749 | sgp->status, sgp->masked_status, sgp->resid); | |
e67f86b3 AB |
1750 | |
1751 | if (sgp->masked_status == SAM_STAT_CHECK_CONDITION) { | |
1752 | if (sgp->mx_sb_len > 0) { | |
1753 | struct fit_comp_error_info *ei = &skspcl->req.err_info; | |
1754 | u32 nbytes = sizeof(*ei); | |
1755 | ||
1756 | nbytes = min_t(u32, nbytes, sgp->mx_sb_len); | |
1757 | ||
1758 | sgp->sb_len_wr = nbytes; | |
1759 | ||
1760 | if (__copy_to_user(sgp->sbp, ei, nbytes)) { | |
2e44b427 | 1761 | pr_debug("%s:%s:%d copy_to_user sense failed %p\n", |
1762 | skdev->name, __func__, __LINE__, | |
1763 | sgp->sbp); | |
e67f86b3 AB |
1764 | return -EFAULT; |
1765 | } | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | if (__copy_to_user(sksgio->argp, sgp, sizeof(sg_io_hdr_t))) { | |
2e44b427 | 1770 | pr_debug("%s:%s:%d copy_to_user sg failed %p\n", |
1771 | skdev->name, __func__, __LINE__, sksgio->argp); | |
e67f86b3 AB |
1772 | return -EFAULT; |
1773 | } | |
1774 | ||
1775 | return 0; | |
1776 | } | |
1777 | ||
1778 | static int skd_sg_io_release_skspcl(struct skd_device *skdev, | |
1779 | struct skd_sg_io *sksgio) | |
1780 | { | |
1781 | struct skd_special_context *skspcl = sksgio->skspcl; | |
1782 | ||
1783 | if (skspcl != NULL) { | |
1784 | ulong flags; | |
1785 | ||
1786 | sksgio->skspcl = NULL; | |
1787 | ||
1788 | spin_lock_irqsave(&skdev->lock, flags); | |
1789 | skd_release_special(skdev, skspcl); | |
1790 | spin_unlock_irqrestore(&skdev->lock, flags); | |
1791 | } | |
1792 | ||
1793 | return 0; | |
1794 | } | |
1795 | ||
1796 | /* | |
1797 | ***************************************************************************** | |
1798 | * INTERNAL REQUESTS -- generated by driver itself | |
1799 | ***************************************************************************** | |
1800 | */ | |
1801 | ||
1802 | static int skd_format_internal_skspcl(struct skd_device *skdev) | |
1803 | { | |
1804 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
1805 | struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[0]; | |
1806 | struct fit_msg_hdr *fmh; | |
1807 | uint64_t dma_address; | |
1808 | struct skd_scsi_request *scsi; | |
1809 | ||
1810 | fmh = (struct fit_msg_hdr *)&skspcl->msg_buf[0]; | |
1811 | fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; | |
1812 | fmh->num_protocol_cmds_coalesced = 1; | |
1813 | ||
1814 | scsi = (struct skd_scsi_request *)&skspcl->msg_buf[64]; | |
1815 | memset(scsi, 0, sizeof(*scsi)); | |
1816 | dma_address = skspcl->req.sksg_dma_address; | |
1817 | scsi->hdr.sg_list_dma_address = cpu_to_be64(dma_address); | |
1818 | sgd->control = FIT_SGD_CONTROL_LAST; | |
1819 | sgd->byte_count = 0; | |
1820 | sgd->host_side_addr = skspcl->db_dma_address; | |
1821 | sgd->dev_side_addr = 0; | |
1822 | sgd->next_desc_ptr = 0LL; | |
1823 | ||
1824 | return 1; | |
1825 | } | |
1826 | ||
1827 | #define WR_BUF_SIZE SKD_N_INTERNAL_BYTES | |
1828 | ||
1829 | static void skd_send_internal_skspcl(struct skd_device *skdev, | |
1830 | struct skd_special_context *skspcl, | |
1831 | u8 opcode) | |
1832 | { | |
1833 | struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[0]; | |
1834 | struct skd_scsi_request *scsi; | |
1835 | unsigned char *buf = skspcl->data_buf; | |
1836 | int i; | |
1837 | ||
1838 | if (skspcl->req.state != SKD_REQ_STATE_IDLE) | |
1839 | /* | |
1840 | * A refresh is already in progress. | |
1841 | * Just wait for it to finish. | |
1842 | */ | |
1843 | return; | |
1844 | ||
1845 | SKD_ASSERT((skspcl->req.id & SKD_ID_INCR) == 0); | |
1846 | skspcl->req.state = SKD_REQ_STATE_BUSY; | |
1847 | skspcl->req.id += SKD_ID_INCR; | |
1848 | ||
1849 | scsi = (struct skd_scsi_request *)&skspcl->msg_buf[64]; | |
1850 | scsi->hdr.tag = skspcl->req.id; | |
1851 | ||
1852 | memset(scsi->cdb, 0, sizeof(scsi->cdb)); | |
1853 | ||
1854 | switch (opcode) { | |
1855 | case TEST_UNIT_READY: | |
1856 | scsi->cdb[0] = TEST_UNIT_READY; | |
1857 | sgd->byte_count = 0; | |
1858 | scsi->hdr.sg_list_len_bytes = 0; | |
1859 | break; | |
1860 | ||
1861 | case READ_CAPACITY: | |
1862 | scsi->cdb[0] = READ_CAPACITY; | |
1863 | sgd->byte_count = SKD_N_READ_CAP_BYTES; | |
1864 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
1865 | break; | |
1866 | ||
1867 | case INQUIRY: | |
1868 | scsi->cdb[0] = INQUIRY; | |
1869 | scsi->cdb[1] = 0x01; /* evpd */ | |
1870 | scsi->cdb[2] = 0x80; /* serial number page */ | |
1871 | scsi->cdb[4] = 0x10; | |
1872 | sgd->byte_count = 16; | |
1873 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
1874 | break; | |
1875 | ||
1876 | case SYNCHRONIZE_CACHE: | |
1877 | scsi->cdb[0] = SYNCHRONIZE_CACHE; | |
1878 | sgd->byte_count = 0; | |
1879 | scsi->hdr.sg_list_len_bytes = 0; | |
1880 | break; | |
1881 | ||
1882 | case WRITE_BUFFER: | |
1883 | scsi->cdb[0] = WRITE_BUFFER; | |
1884 | scsi->cdb[1] = 0x02; | |
1885 | scsi->cdb[7] = (WR_BUF_SIZE & 0xFF00) >> 8; | |
1886 | scsi->cdb[8] = WR_BUF_SIZE & 0xFF; | |
1887 | sgd->byte_count = WR_BUF_SIZE; | |
1888 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
1889 | /* fill incrementing byte pattern */ | |
1890 | for (i = 0; i < sgd->byte_count; i++) | |
1891 | buf[i] = i & 0xFF; | |
1892 | break; | |
1893 | ||
1894 | case READ_BUFFER: | |
1895 | scsi->cdb[0] = READ_BUFFER; | |
1896 | scsi->cdb[1] = 0x02; | |
1897 | scsi->cdb[7] = (WR_BUF_SIZE & 0xFF00) >> 8; | |
1898 | scsi->cdb[8] = WR_BUF_SIZE & 0xFF; | |
1899 | sgd->byte_count = WR_BUF_SIZE; | |
1900 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
1901 | memset(skspcl->data_buf, 0, sgd->byte_count); | |
1902 | break; | |
1903 | ||
1904 | default: | |
1905 | SKD_ASSERT("Don't know what to send"); | |
1906 | return; | |
1907 | ||
1908 | } | |
1909 | skd_send_special_fitmsg(skdev, skspcl); | |
1910 | } | |
1911 | ||
1912 | static void skd_refresh_device_data(struct skd_device *skdev) | |
1913 | { | |
1914 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
1915 | ||
1916 | skd_send_internal_skspcl(skdev, skspcl, TEST_UNIT_READY); | |
1917 | } | |
1918 | ||
1919 | static int skd_chk_read_buf(struct skd_device *skdev, | |
1920 | struct skd_special_context *skspcl) | |
1921 | { | |
1922 | unsigned char *buf = skspcl->data_buf; | |
1923 | int i; | |
1924 | ||
1925 | /* check for incrementing byte pattern */ | |
1926 | for (i = 0; i < WR_BUF_SIZE; i++) | |
1927 | if (buf[i] != (i & 0xFF)) | |
1928 | return 1; | |
1929 | ||
1930 | return 0; | |
1931 | } | |
1932 | ||
1933 | static void skd_log_check_status(struct skd_device *skdev, u8 status, u8 key, | |
1934 | u8 code, u8 qual, u8 fruc) | |
1935 | { | |
1936 | /* If the check condition is of special interest, log a message */ | |
1937 | if ((status == SAM_STAT_CHECK_CONDITION) && (key == 0x02) | |
1938 | && (code == 0x04) && (qual == 0x06)) { | |
1939 | pr_err("(%s): *** LOST_WRITE_DATA ERROR *** key/asc/" | |
1940 | "ascq/fruc %02x/%02x/%02x/%02x\n", | |
1941 | skd_name(skdev), key, code, qual, fruc); | |
1942 | } | |
1943 | } | |
1944 | ||
1945 | static void skd_complete_internal(struct skd_device *skdev, | |
1946 | volatile struct fit_completion_entry_v1 | |
1947 | *skcomp, | |
1948 | volatile struct fit_comp_error_info *skerr, | |
1949 | struct skd_special_context *skspcl) | |
1950 | { | |
1951 | u8 *buf = skspcl->data_buf; | |
1952 | u8 status; | |
1953 | int i; | |
1954 | struct skd_scsi_request *scsi = | |
1955 | (struct skd_scsi_request *)&skspcl->msg_buf[64]; | |
1956 | ||
1957 | SKD_ASSERT(skspcl == &skdev->internal_skspcl); | |
1958 | ||
2e44b427 | 1959 | pr_debug("%s:%s:%d complete internal %x\n", |
1960 | skdev->name, __func__, __LINE__, scsi->cdb[0]); | |
e67f86b3 AB |
1961 | |
1962 | skspcl->req.completion = *skcomp; | |
1963 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
1964 | skspcl->req.id += SKD_ID_INCR; | |
1965 | ||
1966 | status = skspcl->req.completion.status; | |
1967 | ||
1968 | skd_log_check_status(skdev, status, skerr->key, skerr->code, | |
1969 | skerr->qual, skerr->fruc); | |
1970 | ||
1971 | switch (scsi->cdb[0]) { | |
1972 | case TEST_UNIT_READY: | |
1973 | if (status == SAM_STAT_GOOD) | |
1974 | skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); | |
1975 | else if ((status == SAM_STAT_CHECK_CONDITION) && | |
1976 | (skerr->key == MEDIUM_ERROR)) | |
1977 | skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); | |
1978 | else { | |
1979 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
2e44b427 | 1980 | pr_debug("%s:%s:%d TUR failed, don't send anymore state 0x%x\n", |
1981 | skdev->name, __func__, __LINE__, | |
1982 | skdev->state); | |
e67f86b3 AB |
1983 | return; |
1984 | } | |
2e44b427 | 1985 | pr_debug("%s:%s:%d **** TUR failed, retry skerr\n", |
1986 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
1987 | skd_send_internal_skspcl(skdev, skspcl, 0x00); |
1988 | } | |
1989 | break; | |
1990 | ||
1991 | case WRITE_BUFFER: | |
1992 | if (status == SAM_STAT_GOOD) | |
1993 | skd_send_internal_skspcl(skdev, skspcl, READ_BUFFER); | |
1994 | else { | |
1995 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
2e44b427 | 1996 | pr_debug("%s:%s:%d write buffer failed, don't send anymore state 0x%x\n", |
1997 | skdev->name, __func__, __LINE__, | |
1998 | skdev->state); | |
e67f86b3 AB |
1999 | return; |
2000 | } | |
2e44b427 | 2001 | pr_debug("%s:%s:%d **** write buffer failed, retry skerr\n", |
2002 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2003 | skd_send_internal_skspcl(skdev, skspcl, 0x00); |
2004 | } | |
2005 | break; | |
2006 | ||
2007 | case READ_BUFFER: | |
2008 | if (status == SAM_STAT_GOOD) { | |
2009 | if (skd_chk_read_buf(skdev, skspcl) == 0) | |
2010 | skd_send_internal_skspcl(skdev, skspcl, | |
2011 | READ_CAPACITY); | |
2012 | else { | |
2013 | pr_err( | |
2014 | "(%s):*** W/R Buffer mismatch %d ***\n", | |
2015 | skd_name(skdev), skdev->connect_retries); | |
2016 | if (skdev->connect_retries < | |
2017 | SKD_MAX_CONNECT_RETRIES) { | |
2018 | skdev->connect_retries++; | |
2019 | skd_soft_reset(skdev); | |
2020 | } else { | |
2021 | pr_err( | |
2022 | "(%s): W/R Buffer Connect Error\n", | |
2023 | skd_name(skdev)); | |
2024 | return; | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | } else { | |
2029 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
2e44b427 | 2030 | pr_debug("%s:%s:%d " |
2031 | "read buffer failed, don't send anymore state 0x%x\n", | |
2032 | skdev->name, __func__, __LINE__, | |
2033 | skdev->state); | |
e67f86b3 AB |
2034 | return; |
2035 | } | |
2e44b427 | 2036 | pr_debug("%s:%s:%d " |
2037 | "**** read buffer failed, retry skerr\n", | |
2038 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2039 | skd_send_internal_skspcl(skdev, skspcl, 0x00); |
2040 | } | |
2041 | break; | |
2042 | ||
2043 | case READ_CAPACITY: | |
2044 | skdev->read_cap_is_valid = 0; | |
2045 | if (status == SAM_STAT_GOOD) { | |
2046 | skdev->read_cap_last_lba = | |
2047 | (buf[0] << 24) | (buf[1] << 16) | | |
2048 | (buf[2] << 8) | buf[3]; | |
2049 | skdev->read_cap_blocksize = | |
2050 | (buf[4] << 24) | (buf[5] << 16) | | |
2051 | (buf[6] << 8) | buf[7]; | |
2052 | ||
2e44b427 | 2053 | pr_debug("%s:%s:%d last lba %d, bs %d\n", |
2054 | skdev->name, __func__, __LINE__, | |
2055 | skdev->read_cap_last_lba, | |
2056 | skdev->read_cap_blocksize); | |
e67f86b3 AB |
2057 | |
2058 | set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); | |
2059 | ||
2060 | skdev->read_cap_is_valid = 1; | |
2061 | ||
2062 | skd_send_internal_skspcl(skdev, skspcl, INQUIRY); | |
2063 | } else if ((status == SAM_STAT_CHECK_CONDITION) && | |
2064 | (skerr->key == MEDIUM_ERROR)) { | |
2065 | skdev->read_cap_last_lba = ~0; | |
2066 | set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); | |
2e44b427 | 2067 | pr_debug("%s:%s:%d " |
2068 | "**** MEDIUM ERROR caused READCAP to fail, ignore failure and continue to inquiry\n", | |
2069 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2070 | skd_send_internal_skspcl(skdev, skspcl, INQUIRY); |
2071 | } else { | |
2e44b427 | 2072 | pr_debug("%s:%s:%d **** READCAP failed, retry TUR\n", |
2073 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2074 | skd_send_internal_skspcl(skdev, skspcl, |
2075 | TEST_UNIT_READY); | |
2076 | } | |
2077 | break; | |
2078 | ||
2079 | case INQUIRY: | |
2080 | skdev->inquiry_is_valid = 0; | |
2081 | if (status == SAM_STAT_GOOD) { | |
2082 | skdev->inquiry_is_valid = 1; | |
2083 | ||
2084 | for (i = 0; i < 12; i++) | |
2085 | skdev->inq_serial_num[i] = buf[i + 4]; | |
2086 | skdev->inq_serial_num[12] = 0; | |
2087 | } | |
2088 | ||
2089 | if (skd_unquiesce_dev(skdev) < 0) | |
2e44b427 | 2090 | pr_debug("%s:%s:%d **** failed, to ONLINE device\n", |
2091 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2092 | /* connection is complete */ |
2093 | skdev->connect_retries = 0; | |
2094 | break; | |
2095 | ||
2096 | case SYNCHRONIZE_CACHE: | |
2097 | if (status == SAM_STAT_GOOD) | |
2098 | skdev->sync_done = 1; | |
2099 | else | |
2100 | skdev->sync_done = -1; | |
2101 | wake_up_interruptible(&skdev->waitq); | |
2102 | break; | |
2103 | ||
2104 | default: | |
2105 | SKD_ASSERT("we didn't send this"); | |
2106 | } | |
2107 | } | |
2108 | ||
2109 | /* | |
2110 | ***************************************************************************** | |
2111 | * FIT MESSAGES | |
2112 | ***************************************************************************** | |
2113 | */ | |
2114 | ||
2115 | static void skd_send_fitmsg(struct skd_device *skdev, | |
2116 | struct skd_fitmsg_context *skmsg) | |
2117 | { | |
2118 | u64 qcmd; | |
2119 | struct fit_msg_hdr *fmh; | |
2120 | ||
2e44b427 | 2121 | pr_debug("%s:%s:%d dma address 0x%llx, busy=%d\n", |
2122 | skdev->name, __func__, __LINE__, | |
2123 | skmsg->mb_dma_address, skdev->in_flight); | |
2124 | pr_debug("%s:%s:%d msg_buf 0x%p, offset %x\n", | |
2125 | skdev->name, __func__, __LINE__, | |
2126 | skmsg->msg_buf, skmsg->offset); | |
e67f86b3 AB |
2127 | |
2128 | qcmd = skmsg->mb_dma_address; | |
2129 | qcmd |= FIT_QCMD_QID_NORMAL; | |
2130 | ||
2131 | fmh = (struct fit_msg_hdr *)skmsg->msg_buf; | |
2132 | skmsg->outstanding = fmh->num_protocol_cmds_coalesced; | |
2133 | ||
2134 | if (unlikely(skdev->dbg_level > 1)) { | |
2135 | u8 *bp = (u8 *)skmsg->msg_buf; | |
2136 | int i; | |
2137 | for (i = 0; i < skmsg->length; i += 8) { | |
8e1de26c AS |
2138 | pr_debug("%s:%s:%d msg[%2d] %8ph\n", |
2139 | skdev->name, __func__, __LINE__, i, &bp[i]); | |
e67f86b3 AB |
2140 | if (i == 0) |
2141 | i = 64 - 8; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | if (skmsg->length > 256) | |
2146 | qcmd |= FIT_QCMD_MSGSIZE_512; | |
2147 | else if (skmsg->length > 128) | |
2148 | qcmd |= FIT_QCMD_MSGSIZE_256; | |
2149 | else if (skmsg->length > 64) | |
2150 | qcmd |= FIT_QCMD_MSGSIZE_128; | |
2151 | else | |
2152 | /* | |
2153 | * This makes no sense because the FIT msg header is | |
2154 | * 64 bytes. If the msg is only 64 bytes long it has | |
2155 | * no payload. | |
2156 | */ | |
2157 | qcmd |= FIT_QCMD_MSGSIZE_64; | |
2158 | ||
2159 | SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); | |
e67f86b3 AB |
2160 | } |
2161 | ||
2162 | static void skd_send_special_fitmsg(struct skd_device *skdev, | |
2163 | struct skd_special_context *skspcl) | |
2164 | { | |
2165 | u64 qcmd; | |
2166 | ||
2167 | if (unlikely(skdev->dbg_level > 1)) { | |
2168 | u8 *bp = (u8 *)skspcl->msg_buf; | |
2169 | int i; | |
2170 | ||
2171 | for (i = 0; i < SKD_N_SPECIAL_FITMSG_BYTES; i += 8) { | |
8e1de26c AS |
2172 | pr_debug("%s:%s:%d spcl[%2d] %8ph\n", |
2173 | skdev->name, __func__, __LINE__, i, &bp[i]); | |
e67f86b3 AB |
2174 | if (i == 0) |
2175 | i = 64 - 8; | |
2176 | } | |
2177 | ||
2e44b427 | 2178 | pr_debug("%s:%s:%d skspcl=%p id=%04x sksg_list=%p sksg_dma=%llx\n", |
2179 | skdev->name, __func__, __LINE__, | |
2180 | skspcl, skspcl->req.id, skspcl->req.sksg_list, | |
2181 | skspcl->req.sksg_dma_address); | |
e67f86b3 AB |
2182 | for (i = 0; i < skspcl->req.n_sg; i++) { |
2183 | struct fit_sg_descriptor *sgd = | |
2184 | &skspcl->req.sksg_list[i]; | |
2185 | ||
2e44b427 | 2186 | pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " |
2187 | "addr=0x%llx next=0x%llx\n", | |
2188 | skdev->name, __func__, __LINE__, | |
2189 | i, sgd->byte_count, sgd->control, | |
2190 | sgd->host_side_addr, sgd->next_desc_ptr); | |
e67f86b3 AB |
2191 | } |
2192 | } | |
2193 | ||
2194 | /* | |
2195 | * Special FIT msgs are always 128 bytes: a 64-byte FIT hdr | |
2196 | * and one 64-byte SSDI command. | |
2197 | */ | |
2198 | qcmd = skspcl->mb_dma_address; | |
2199 | qcmd |= FIT_QCMD_QID_NORMAL + FIT_QCMD_MSGSIZE_128; | |
2200 | ||
2201 | SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); | |
2202 | } | |
2203 | ||
2204 | /* | |
2205 | ***************************************************************************** | |
2206 | * COMPLETION QUEUE | |
2207 | ***************************************************************************** | |
2208 | */ | |
2209 | ||
2210 | static void skd_complete_other(struct skd_device *skdev, | |
2211 | volatile struct fit_completion_entry_v1 *skcomp, | |
2212 | volatile struct fit_comp_error_info *skerr); | |
2213 | ||
e67f86b3 AB |
2214 | struct sns_info { |
2215 | u8 type; | |
2216 | u8 stat; | |
2217 | u8 key; | |
2218 | u8 asc; | |
2219 | u8 ascq; | |
2220 | u8 mask; | |
2221 | enum skd_check_status_action action; | |
2222 | }; | |
2223 | ||
2224 | static struct sns_info skd_chkstat_table[] = { | |
2225 | /* Good */ | |
2226 | { 0x70, 0x02, RECOVERED_ERROR, 0, 0, 0x1c, | |
2227 | SKD_CHECK_STATUS_REPORT_GOOD }, | |
2228 | ||
2229 | /* Smart alerts */ | |
2230 | { 0x70, 0x02, NO_SENSE, 0x0B, 0x00, 0x1E, /* warnings */ | |
2231 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
2232 | { 0x70, 0x02, NO_SENSE, 0x5D, 0x00, 0x1E, /* thresholds */ | |
2233 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
2234 | { 0x70, 0x02, RECOVERED_ERROR, 0x0B, 0x01, 0x1F, /* temperature over trigger */ | |
2235 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
2236 | ||
2237 | /* Retry (with limits) */ | |
2238 | { 0x70, 0x02, 0x0B, 0, 0, 0x1C, /* This one is for DMA ERROR */ | |
2239 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
2240 | { 0x70, 0x02, 0x06, 0x0B, 0x00, 0x1E, /* warnings */ | |
2241 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
2242 | { 0x70, 0x02, 0x06, 0x5D, 0x00, 0x1E, /* thresholds */ | |
2243 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
2244 | { 0x70, 0x02, 0x06, 0x80, 0x30, 0x1F, /* backup power */ | |
2245 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
2246 | ||
2247 | /* Busy (or about to be) */ | |
2248 | { 0x70, 0x02, 0x06, 0x3f, 0x01, 0x1F, /* fw changed */ | |
2249 | SKD_CHECK_STATUS_BUSY_IMMINENT }, | |
2250 | }; | |
2251 | ||
2252 | /* | |
2253 | * Look up status and sense data to decide how to handle the error | |
2254 | * from the device. | |
2255 | * mask says which fields must match e.g., mask=0x18 means check | |
2256 | * type and stat, ignore key, asc, ascq. | |
2257 | */ | |
2258 | ||
38d4a1bb MS |
2259 | static enum skd_check_status_action |
2260 | skd_check_status(struct skd_device *skdev, | |
2261 | u8 cmp_status, volatile struct fit_comp_error_info *skerr) | |
e67f86b3 AB |
2262 | { |
2263 | int i, n; | |
2264 | ||
2265 | pr_err("(%s): key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", | |
2266 | skd_name(skdev), skerr->key, skerr->code, skerr->qual, | |
2267 | skerr->fruc); | |
2268 | ||
2e44b427 | 2269 | pr_debug("%s:%s:%d stat: t=%02x stat=%02x k=%02x c=%02x q=%02x fruc=%02x\n", |
2270 | skdev->name, __func__, __LINE__, skerr->type, cmp_status, | |
2271 | skerr->key, skerr->code, skerr->qual, skerr->fruc); | |
e67f86b3 AB |
2272 | |
2273 | /* Does the info match an entry in the good category? */ | |
2274 | n = sizeof(skd_chkstat_table) / sizeof(skd_chkstat_table[0]); | |
2275 | for (i = 0; i < n; i++) { | |
2276 | struct sns_info *sns = &skd_chkstat_table[i]; | |
2277 | ||
2278 | if (sns->mask & 0x10) | |
2279 | if (skerr->type != sns->type) | |
2280 | continue; | |
2281 | ||
2282 | if (sns->mask & 0x08) | |
2283 | if (cmp_status != sns->stat) | |
2284 | continue; | |
2285 | ||
2286 | if (sns->mask & 0x04) | |
2287 | if (skerr->key != sns->key) | |
2288 | continue; | |
2289 | ||
2290 | if (sns->mask & 0x02) | |
2291 | if (skerr->code != sns->asc) | |
2292 | continue; | |
2293 | ||
2294 | if (sns->mask & 0x01) | |
2295 | if (skerr->qual != sns->ascq) | |
2296 | continue; | |
2297 | ||
2298 | if (sns->action == SKD_CHECK_STATUS_REPORT_SMART_ALERT) { | |
2299 | pr_err("(%s): SMART Alert: sense key/asc/ascq " | |
2300 | "%02x/%02x/%02x\n", | |
2301 | skd_name(skdev), skerr->key, | |
2302 | skerr->code, skerr->qual); | |
2303 | } | |
2304 | return sns->action; | |
2305 | } | |
2306 | ||
2307 | /* No other match, so nonzero status means error, | |
2308 | * zero status means good | |
2309 | */ | |
2310 | if (cmp_status) { | |
2e44b427 | 2311 | pr_debug("%s:%s:%d status check: error\n", |
2312 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2313 | return SKD_CHECK_STATUS_REPORT_ERROR; |
2314 | } | |
2315 | ||
2e44b427 | 2316 | pr_debug("%s:%s:%d status check good default\n", |
2317 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2318 | return SKD_CHECK_STATUS_REPORT_GOOD; |
2319 | } | |
2320 | ||
2321 | static void skd_resolve_req_exception(struct skd_device *skdev, | |
2322 | struct skd_request_context *skreq) | |
2323 | { | |
2324 | u8 cmp_status = skreq->completion.status; | |
2325 | ||
2326 | switch (skd_check_status(skdev, cmp_status, &skreq->err_info)) { | |
2327 | case SKD_CHECK_STATUS_REPORT_GOOD: | |
2328 | case SKD_CHECK_STATUS_REPORT_SMART_ALERT: | |
2329 | skd_end_request(skdev, skreq, 0); | |
2330 | break; | |
2331 | ||
2332 | case SKD_CHECK_STATUS_BUSY_IMMINENT: | |
2333 | skd_log_skreq(skdev, skreq, "retry(busy)"); | |
38d4a1bb | 2334 | blk_requeue_request(skdev->queue, skreq->req); |
e67f86b3 AB |
2335 | pr_info("(%s) drive BUSY imminent\n", skd_name(skdev)); |
2336 | skdev->state = SKD_DRVR_STATE_BUSY_IMMINENT; | |
2337 | skdev->timer_countdown = SKD_TIMER_MINUTES(20); | |
2338 | skd_quiesce_dev(skdev); | |
2339 | break; | |
2340 | ||
2341 | case SKD_CHECK_STATUS_REQUEUE_REQUEST: | |
fcd37eb3 JA |
2342 | if ((unsigned long) ++skreq->req->special < SKD_MAX_RETRIES) { |
2343 | skd_log_skreq(skdev, skreq, "retry"); | |
38d4a1bb | 2344 | blk_requeue_request(skdev->queue, skreq->req); |
fcd37eb3 | 2345 | break; |
e67f86b3 AB |
2346 | } |
2347 | /* fall through to report error */ | |
2348 | ||
2349 | case SKD_CHECK_STATUS_REPORT_ERROR: | |
2350 | default: | |
2351 | skd_end_request(skdev, skreq, -EIO); | |
2352 | break; | |
2353 | } | |
2354 | } | |
2355 | ||
e67f86b3 AB |
2356 | /* assume spinlock is already held */ |
2357 | static void skd_release_skreq(struct skd_device *skdev, | |
2358 | struct skd_request_context *skreq) | |
2359 | { | |
2360 | u32 msg_slot; | |
2361 | struct skd_fitmsg_context *skmsg; | |
2362 | ||
2363 | u32 timo_slot; | |
2364 | ||
2365 | /* | |
2366 | * Reclaim the FIT msg buffer if this is | |
2367 | * the first of the requests it carried to | |
2368 | * be completed. The FIT msg buffer used to | |
2369 | * send this request cannot be reused until | |
2370 | * we are sure the s1120 card has copied | |
2371 | * it to its memory. The FIT msg might have | |
2372 | * contained several requests. As soon as | |
2373 | * any of them are completed we know that | |
2374 | * the entire FIT msg was transferred. | |
2375 | * Only the first completed request will | |
2376 | * match the FIT msg buffer id. The FIT | |
2377 | * msg buffer id is immediately updated. | |
2378 | * When subsequent requests complete the FIT | |
2379 | * msg buffer id won't match, so we know | |
2380 | * quite cheaply that it is already done. | |
2381 | */ | |
2382 | msg_slot = skreq->fitmsg_id & SKD_ID_SLOT_MASK; | |
2383 | SKD_ASSERT(msg_slot < skdev->num_fitmsg_context); | |
2384 | ||
2385 | skmsg = &skdev->skmsg_table[msg_slot]; | |
2386 | if (skmsg->id == skreq->fitmsg_id) { | |
2387 | SKD_ASSERT(skmsg->state == SKD_MSG_STATE_BUSY); | |
2388 | SKD_ASSERT(skmsg->outstanding > 0); | |
2389 | skmsg->outstanding--; | |
2390 | if (skmsg->outstanding == 0) { | |
2391 | skmsg->state = SKD_MSG_STATE_IDLE; | |
2392 | skmsg->id += SKD_ID_INCR; | |
2393 | skmsg->next = skdev->skmsg_free_list; | |
2394 | skdev->skmsg_free_list = skmsg; | |
2395 | } | |
2396 | } | |
2397 | ||
2398 | /* | |
2399 | * Decrease the number of active requests. | |
2400 | * Also decrements the count in the timeout slot. | |
2401 | */ | |
2402 | SKD_ASSERT(skdev->in_flight > 0); | |
2403 | skdev->in_flight -= 1; | |
2404 | ||
2405 | timo_slot = skreq->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; | |
2406 | SKD_ASSERT(skdev->timeout_slot[timo_slot] > 0); | |
2407 | skdev->timeout_slot[timo_slot] -= 1; | |
2408 | ||
2409 | /* | |
2410 | * Reset backpointer | |
2411 | */ | |
fcd37eb3 | 2412 | skreq->req = NULL; |
e67f86b3 AB |
2413 | |
2414 | /* | |
2415 | * Reclaim the skd_request_context | |
2416 | */ | |
2417 | skreq->state = SKD_REQ_STATE_IDLE; | |
2418 | skreq->id += SKD_ID_INCR; | |
2419 | skreq->next = skdev->skreq_free_list; | |
2420 | skdev->skreq_free_list = skreq; | |
2421 | } | |
2422 | ||
2423 | #define DRIVER_INQ_EVPD_PAGE_CODE 0xDA | |
2424 | ||
2425 | static void skd_do_inq_page_00(struct skd_device *skdev, | |
2426 | volatile struct fit_completion_entry_v1 *skcomp, | |
2427 | volatile struct fit_comp_error_info *skerr, | |
2428 | uint8_t *cdb, uint8_t *buf) | |
2429 | { | |
2430 | uint16_t insert_pt, max_bytes, drive_pages, drive_bytes, new_size; | |
2431 | ||
2432 | /* Caller requested "supported pages". The driver needs to insert | |
2433 | * its page. | |
2434 | */ | |
2e44b427 | 2435 | pr_debug("%s:%s:%d skd_do_driver_inquiry: modify supported pages.\n", |
2436 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2437 | |
2438 | /* If the device rejected the request because the CDB was | |
2439 | * improperly formed, then just leave. | |
2440 | */ | |
2441 | if (skcomp->status == SAM_STAT_CHECK_CONDITION && | |
2442 | skerr->key == ILLEGAL_REQUEST && skerr->code == 0x24) | |
2443 | return; | |
2444 | ||
2445 | /* Get the amount of space the caller allocated */ | |
2446 | max_bytes = (cdb[3] << 8) | cdb[4]; | |
2447 | ||
2448 | /* Get the number of pages actually returned by the device */ | |
2449 | drive_pages = (buf[2] << 8) | buf[3]; | |
2450 | drive_bytes = drive_pages + 4; | |
2451 | new_size = drive_pages + 1; | |
2452 | ||
2453 | /* Supported pages must be in numerical order, so find where | |
2454 | * the driver page needs to be inserted into the list of | |
2455 | * pages returned by the device. | |
2456 | */ | |
2457 | for (insert_pt = 4; insert_pt < drive_bytes; insert_pt++) { | |
2458 | if (buf[insert_pt] == DRIVER_INQ_EVPD_PAGE_CODE) | |
2459 | return; /* Device using this page code. abort */ | |
2460 | else if (buf[insert_pt] > DRIVER_INQ_EVPD_PAGE_CODE) | |
2461 | break; | |
2462 | } | |
2463 | ||
2464 | if (insert_pt < max_bytes) { | |
2465 | uint16_t u; | |
2466 | ||
2467 | /* Shift everything up one byte to make room. */ | |
2468 | for (u = new_size + 3; u > insert_pt; u--) | |
2469 | buf[u] = buf[u - 1]; | |
2470 | buf[insert_pt] = DRIVER_INQ_EVPD_PAGE_CODE; | |
2471 | ||
2472 | /* SCSI byte order increment of num_returned_bytes by 1 */ | |
2473 | skcomp->num_returned_bytes = | |
2474 | be32_to_cpu(skcomp->num_returned_bytes) + 1; | |
2475 | skcomp->num_returned_bytes = | |
2476 | be32_to_cpu(skcomp->num_returned_bytes); | |
2477 | } | |
2478 | ||
2479 | /* update page length field to reflect the driver's page too */ | |
2480 | buf[2] = (uint8_t)((new_size >> 8) & 0xFF); | |
2481 | buf[3] = (uint8_t)((new_size >> 0) & 0xFF); | |
2482 | } | |
2483 | ||
2484 | static void skd_get_link_info(struct pci_dev *pdev, u8 *speed, u8 *width) | |
2485 | { | |
2486 | int pcie_reg; | |
2487 | u16 pci_bus_speed; | |
2488 | u8 pci_lanes; | |
2489 | ||
2490 | pcie_reg = pci_find_capability(pdev, PCI_CAP_ID_EXP); | |
2491 | if (pcie_reg) { | |
2492 | u16 linksta; | |
2493 | pci_read_config_word(pdev, pcie_reg + PCI_EXP_LNKSTA, &linksta); | |
2494 | ||
2495 | pci_bus_speed = linksta & 0xF; | |
2496 | pci_lanes = (linksta & 0x3F0) >> 4; | |
2497 | } else { | |
2498 | *speed = STEC_LINK_UNKNOWN; | |
2499 | *width = 0xFF; | |
2500 | return; | |
2501 | } | |
2502 | ||
2503 | switch (pci_bus_speed) { | |
2504 | case 1: | |
2505 | *speed = STEC_LINK_2_5GTS; | |
2506 | break; | |
2507 | case 2: | |
2508 | *speed = STEC_LINK_5GTS; | |
2509 | break; | |
2510 | case 3: | |
2511 | *speed = STEC_LINK_8GTS; | |
2512 | break; | |
2513 | default: | |
2514 | *speed = STEC_LINK_UNKNOWN; | |
2515 | break; | |
2516 | } | |
2517 | ||
2518 | if (pci_lanes <= 0x20) | |
2519 | *width = pci_lanes; | |
2520 | else | |
2521 | *width = 0xFF; | |
2522 | } | |
2523 | ||
2524 | static void skd_do_inq_page_da(struct skd_device *skdev, | |
2525 | volatile struct fit_completion_entry_v1 *skcomp, | |
2526 | volatile struct fit_comp_error_info *skerr, | |
2527 | uint8_t *cdb, uint8_t *buf) | |
2528 | { | |
fec23f63 | 2529 | struct pci_dev *pdev = skdev->pdev; |
e67f86b3 AB |
2530 | unsigned max_bytes; |
2531 | struct driver_inquiry_data inq; | |
2532 | u16 val; | |
2533 | ||
2e44b427 | 2534 | pr_debug("%s:%s:%d skd_do_driver_inquiry: return driver page\n", |
2535 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2536 | |
2537 | memset(&inq, 0, sizeof(inq)); | |
2538 | ||
2539 | inq.page_code = DRIVER_INQ_EVPD_PAGE_CODE; | |
2540 | ||
fec23f63 BZ |
2541 | skd_get_link_info(pdev, &inq.pcie_link_speed, &inq.pcie_link_lanes); |
2542 | inq.pcie_bus_number = cpu_to_be16(pdev->bus->number); | |
2543 | inq.pcie_device_number = PCI_SLOT(pdev->devfn); | |
2544 | inq.pcie_function_number = PCI_FUNC(pdev->devfn); | |
e67f86b3 | 2545 | |
fec23f63 BZ |
2546 | pci_read_config_word(pdev, PCI_VENDOR_ID, &val); |
2547 | inq.pcie_vendor_id = cpu_to_be16(val); | |
e67f86b3 | 2548 | |
fec23f63 BZ |
2549 | pci_read_config_word(pdev, PCI_DEVICE_ID, &val); |
2550 | inq.pcie_device_id = cpu_to_be16(val); | |
e67f86b3 | 2551 | |
fec23f63 BZ |
2552 | pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &val); |
2553 | inq.pcie_subsystem_vendor_id = cpu_to_be16(val); | |
e67f86b3 | 2554 | |
fec23f63 BZ |
2555 | pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &val); |
2556 | inq.pcie_subsystem_device_id = cpu_to_be16(val); | |
e67f86b3 AB |
2557 | |
2558 | /* Driver version, fixed lenth, padded with spaces on the right */ | |
2559 | inq.driver_version_length = sizeof(inq.driver_version); | |
2560 | memset(&inq.driver_version, ' ', sizeof(inq.driver_version)); | |
2561 | memcpy(inq.driver_version, DRV_VER_COMPL, | |
2562 | min(sizeof(inq.driver_version), strlen(DRV_VER_COMPL))); | |
2563 | ||
2564 | inq.page_length = cpu_to_be16((sizeof(inq) - 4)); | |
2565 | ||
2566 | /* Clear the error set by the device */ | |
2567 | skcomp->status = SAM_STAT_GOOD; | |
2568 | memset((void *)skerr, 0, sizeof(*skerr)); | |
2569 | ||
2570 | /* copy response into output buffer */ | |
2571 | max_bytes = (cdb[3] << 8) | cdb[4]; | |
2572 | memcpy(buf, &inq, min_t(unsigned, max_bytes, sizeof(inq))); | |
2573 | ||
2574 | skcomp->num_returned_bytes = | |
2575 | be32_to_cpu(min_t(uint16_t, max_bytes, sizeof(inq))); | |
2576 | } | |
2577 | ||
2578 | static void skd_do_driver_inq(struct skd_device *skdev, | |
2579 | volatile struct fit_completion_entry_v1 *skcomp, | |
2580 | volatile struct fit_comp_error_info *skerr, | |
2581 | uint8_t *cdb, uint8_t *buf) | |
2582 | { | |
2583 | if (!buf) | |
2584 | return; | |
2585 | else if (cdb[0] != INQUIRY) | |
2586 | return; /* Not an INQUIRY */ | |
2587 | else if ((cdb[1] & 1) == 0) | |
2588 | return; /* EVPD not set */ | |
2589 | else if (cdb[2] == 0) | |
2590 | /* Need to add driver's page to supported pages list */ | |
2591 | skd_do_inq_page_00(skdev, skcomp, skerr, cdb, buf); | |
2592 | else if (cdb[2] == DRIVER_INQ_EVPD_PAGE_CODE) | |
2593 | /* Caller requested driver's page */ | |
2594 | skd_do_inq_page_da(skdev, skcomp, skerr, cdb, buf); | |
2595 | } | |
2596 | ||
2597 | static unsigned char *skd_sg_1st_page_ptr(struct scatterlist *sg) | |
2598 | { | |
2599 | if (!sg) | |
2600 | return NULL; | |
2601 | if (!sg_page(sg)) | |
2602 | return NULL; | |
2603 | return sg_virt(sg); | |
2604 | } | |
2605 | ||
2606 | static void skd_process_scsi_inq(struct skd_device *skdev, | |
2607 | volatile struct fit_completion_entry_v1 | |
2608 | *skcomp, | |
2609 | volatile struct fit_comp_error_info *skerr, | |
2610 | struct skd_special_context *skspcl) | |
2611 | { | |
2612 | uint8_t *buf; | |
2613 | struct fit_msg_hdr *fmh = (struct fit_msg_hdr *)skspcl->msg_buf; | |
2614 | struct skd_scsi_request *scsi_req = (struct skd_scsi_request *)&fmh[1]; | |
2615 | ||
2616 | dma_sync_sg_for_cpu(skdev->class_dev, skspcl->req.sg, skspcl->req.n_sg, | |
2617 | skspcl->req.sg_data_dir); | |
2618 | buf = skd_sg_1st_page_ptr(skspcl->req.sg); | |
2619 | ||
2620 | if (buf) | |
2621 | skd_do_driver_inq(skdev, skcomp, skerr, scsi_req->cdb, buf); | |
2622 | } | |
2623 | ||
2624 | ||
2625 | static int skd_isr_completion_posted(struct skd_device *skdev, | |
2626 | int limit, int *enqueued) | |
2627 | { | |
2628 | volatile struct fit_completion_entry_v1 *skcmp = NULL; | |
2629 | volatile struct fit_comp_error_info *skerr; | |
2630 | u16 req_id; | |
2631 | u32 req_slot; | |
2632 | struct skd_request_context *skreq; | |
2633 | u16 cmp_cntxt = 0; | |
2634 | u8 cmp_status = 0; | |
2635 | u8 cmp_cycle = 0; | |
2636 | u32 cmp_bytes = 0; | |
2637 | int rc = 0; | |
2638 | int processed = 0; | |
e67f86b3 AB |
2639 | |
2640 | for (;; ) { | |
2641 | SKD_ASSERT(skdev->skcomp_ix < SKD_N_COMPLETION_ENTRY); | |
2642 | ||
2643 | skcmp = &skdev->skcomp_table[skdev->skcomp_ix]; | |
2644 | cmp_cycle = skcmp->cycle; | |
2645 | cmp_cntxt = skcmp->tag; | |
2646 | cmp_status = skcmp->status; | |
2647 | cmp_bytes = be32_to_cpu(skcmp->num_returned_bytes); | |
2648 | ||
2649 | skerr = &skdev->skerr_table[skdev->skcomp_ix]; | |
2650 | ||
2e44b427 | 2651 | pr_debug("%s:%s:%d " |
2652 | "cycle=%d ix=%d got cycle=%d cmdctxt=0x%x stat=%d " | |
2653 | "busy=%d rbytes=0x%x proto=%d\n", | |
2654 | skdev->name, __func__, __LINE__, skdev->skcomp_cycle, | |
2655 | skdev->skcomp_ix, cmp_cycle, cmp_cntxt, cmp_status, | |
2656 | skdev->in_flight, cmp_bytes, skdev->proto_ver); | |
e67f86b3 AB |
2657 | |
2658 | if (cmp_cycle != skdev->skcomp_cycle) { | |
2e44b427 | 2659 | pr_debug("%s:%s:%d end of completions\n", |
2660 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2661 | break; |
2662 | } | |
2663 | /* | |
2664 | * Update the completion queue head index and possibly | |
2665 | * the completion cycle count. 8-bit wrap-around. | |
2666 | */ | |
2667 | skdev->skcomp_ix++; | |
2668 | if (skdev->skcomp_ix >= SKD_N_COMPLETION_ENTRY) { | |
2669 | skdev->skcomp_ix = 0; | |
2670 | skdev->skcomp_cycle++; | |
2671 | } | |
2672 | ||
2673 | /* | |
2674 | * The command context is a unique 32-bit ID. The low order | |
2675 | * bits help locate the request. The request is usually a | |
2676 | * r/w request (see skd_start() above) or a special request. | |
2677 | */ | |
2678 | req_id = cmp_cntxt; | |
2679 | req_slot = req_id & SKD_ID_SLOT_AND_TABLE_MASK; | |
2680 | ||
2681 | /* Is this other than a r/w request? */ | |
2682 | if (req_slot >= skdev->num_req_context) { | |
2683 | /* | |
2684 | * This is not a completion for a r/w request. | |
2685 | */ | |
2686 | skd_complete_other(skdev, skcmp, skerr); | |
2687 | continue; | |
2688 | } | |
2689 | ||
2690 | skreq = &skdev->skreq_table[req_slot]; | |
2691 | ||
2692 | /* | |
2693 | * Make sure the request ID for the slot matches. | |
2694 | */ | |
2695 | if (skreq->id != req_id) { | |
2e44b427 | 2696 | pr_debug("%s:%s:%d mismatch comp_id=0x%x req_id=0x%x\n", |
2697 | skdev->name, __func__, __LINE__, | |
2698 | req_id, skreq->id); | |
e67f86b3 AB |
2699 | { |
2700 | u16 new_id = cmp_cntxt; | |
2701 | pr_err("(%s): Completion mismatch " | |
2702 | "comp_id=0x%04x skreq=0x%04x new=0x%04x\n", | |
2703 | skd_name(skdev), req_id, | |
2704 | skreq->id, new_id); | |
2705 | ||
2706 | continue; | |
2707 | } | |
2708 | } | |
2709 | ||
2710 | SKD_ASSERT(skreq->state == SKD_REQ_STATE_BUSY); | |
2711 | ||
2712 | if (skreq->state == SKD_REQ_STATE_ABORTED) { | |
2e44b427 | 2713 | pr_debug("%s:%s:%d reclaim req %p id=%04x\n", |
2714 | skdev->name, __func__, __LINE__, | |
2715 | skreq, skreq->id); | |
e67f86b3 AB |
2716 | /* a previously timed out command can |
2717 | * now be cleaned up */ | |
2718 | skd_release_skreq(skdev, skreq); | |
2719 | continue; | |
2720 | } | |
2721 | ||
2722 | skreq->completion = *skcmp; | |
2723 | if (unlikely(cmp_status == SAM_STAT_CHECK_CONDITION)) { | |
2724 | skreq->err_info = *skerr; | |
2725 | skd_log_check_status(skdev, cmp_status, skerr->key, | |
2726 | skerr->code, skerr->qual, | |
2727 | skerr->fruc); | |
2728 | } | |
2729 | /* Release DMA resources for the request. */ | |
2730 | if (skreq->n_sg > 0) | |
2731 | skd_postop_sg_list(skdev, skreq); | |
2732 | ||
fcd37eb3 | 2733 | if (!skreq->req) { |
2e44b427 | 2734 | pr_debug("%s:%s:%d NULL backptr skdreq %p, " |
2735 | "req=0x%x req_id=0x%x\n", | |
2736 | skdev->name, __func__, __LINE__, | |
2737 | skreq, skreq->id, req_id); | |
e67f86b3 AB |
2738 | } else { |
2739 | /* | |
2740 | * Capture the outcome and post it back to the | |
2741 | * native request. | |
2742 | */ | |
fcd37eb3 JA |
2743 | if (likely(cmp_status == SAM_STAT_GOOD)) |
2744 | skd_end_request(skdev, skreq, 0); | |
2745 | else | |
e67f86b3 | 2746 | skd_resolve_req_exception(skdev, skreq); |
e67f86b3 AB |
2747 | } |
2748 | ||
2749 | /* | |
2750 | * Release the skreq, its FIT msg (if one), timeout slot, | |
2751 | * and queue depth. | |
2752 | */ | |
2753 | skd_release_skreq(skdev, skreq); | |
2754 | ||
2755 | /* skd_isr_comp_limit equal zero means no limit */ | |
2756 | if (limit) { | |
2757 | if (++processed >= limit) { | |
2758 | rc = 1; | |
2759 | break; | |
2760 | } | |
2761 | } | |
2762 | } | |
2763 | ||
2764 | if ((skdev->state == SKD_DRVR_STATE_PAUSING) | |
2765 | && (skdev->in_flight) == 0) { | |
2766 | skdev->state = SKD_DRVR_STATE_PAUSED; | |
2767 | wake_up_interruptible(&skdev->waitq); | |
2768 | } | |
2769 | ||
2770 | return rc; | |
2771 | } | |
2772 | ||
2773 | static void skd_complete_other(struct skd_device *skdev, | |
2774 | volatile struct fit_completion_entry_v1 *skcomp, | |
2775 | volatile struct fit_comp_error_info *skerr) | |
2776 | { | |
2777 | u32 req_id = 0; | |
2778 | u32 req_table; | |
2779 | u32 req_slot; | |
2780 | struct skd_special_context *skspcl; | |
2781 | ||
2782 | req_id = skcomp->tag; | |
2783 | req_table = req_id & SKD_ID_TABLE_MASK; | |
2784 | req_slot = req_id & SKD_ID_SLOT_MASK; | |
2785 | ||
2e44b427 | 2786 | pr_debug("%s:%s:%d table=0x%x id=0x%x slot=%d\n", |
2787 | skdev->name, __func__, __LINE__, | |
2788 | req_table, req_id, req_slot); | |
e67f86b3 AB |
2789 | |
2790 | /* | |
2791 | * Based on the request id, determine how to dispatch this completion. | |
2792 | * This swich/case is finding the good cases and forwarding the | |
2793 | * completion entry. Errors are reported below the switch. | |
2794 | */ | |
2795 | switch (req_table) { | |
2796 | case SKD_ID_RW_REQUEST: | |
2797 | /* | |
2798 | * The caller, skd_completion_posted_isr() above, | |
2799 | * handles r/w requests. The only way we get here | |
2800 | * is if the req_slot is out of bounds. | |
2801 | */ | |
2802 | break; | |
2803 | ||
2804 | case SKD_ID_SPECIAL_REQUEST: | |
2805 | /* | |
2806 | * Make sure the req_slot is in bounds and that the id | |
2807 | * matches. | |
2808 | */ | |
2809 | if (req_slot < skdev->n_special) { | |
2810 | skspcl = &skdev->skspcl_table[req_slot]; | |
2811 | if (skspcl->req.id == req_id && | |
2812 | skspcl->req.state == SKD_REQ_STATE_BUSY) { | |
2813 | skd_complete_special(skdev, | |
2814 | skcomp, skerr, skspcl); | |
2815 | return; | |
2816 | } | |
2817 | } | |
2818 | break; | |
2819 | ||
2820 | case SKD_ID_INTERNAL: | |
2821 | if (req_slot == 0) { | |
2822 | skspcl = &skdev->internal_skspcl; | |
2823 | if (skspcl->req.id == req_id && | |
2824 | skspcl->req.state == SKD_REQ_STATE_BUSY) { | |
2825 | skd_complete_internal(skdev, | |
2826 | skcomp, skerr, skspcl); | |
2827 | return; | |
2828 | } | |
2829 | } | |
2830 | break; | |
2831 | ||
2832 | case SKD_ID_FIT_MSG: | |
2833 | /* | |
2834 | * These id's should never appear in a completion record. | |
2835 | */ | |
2836 | break; | |
2837 | ||
2838 | default: | |
2839 | /* | |
2840 | * These id's should never appear anywhere; | |
2841 | */ | |
2842 | break; | |
2843 | } | |
2844 | ||
2845 | /* | |
2846 | * If we get here it is a bad or stale id. | |
2847 | */ | |
2848 | } | |
2849 | ||
2850 | static void skd_complete_special(struct skd_device *skdev, | |
2851 | volatile struct fit_completion_entry_v1 | |
2852 | *skcomp, | |
2853 | volatile struct fit_comp_error_info *skerr, | |
2854 | struct skd_special_context *skspcl) | |
2855 | { | |
2e44b427 | 2856 | pr_debug("%s:%s:%d completing special request %p\n", |
2857 | skdev->name, __func__, __LINE__, skspcl); | |
e67f86b3 AB |
2858 | if (skspcl->orphaned) { |
2859 | /* Discard orphaned request */ | |
2860 | /* ?: Can this release directly or does it need | |
2861 | * to use a worker? */ | |
2e44b427 | 2862 | pr_debug("%s:%s:%d release orphaned %p\n", |
2863 | skdev->name, __func__, __LINE__, skspcl); | |
e67f86b3 AB |
2864 | skd_release_special(skdev, skspcl); |
2865 | return; | |
2866 | } | |
2867 | ||
2868 | skd_process_scsi_inq(skdev, skcomp, skerr, skspcl); | |
2869 | ||
2870 | skspcl->req.state = SKD_REQ_STATE_COMPLETED; | |
2871 | skspcl->req.completion = *skcomp; | |
2872 | skspcl->req.err_info = *skerr; | |
2873 | ||
2874 | skd_log_check_status(skdev, skspcl->req.completion.status, skerr->key, | |
2875 | skerr->code, skerr->qual, skerr->fruc); | |
2876 | ||
2877 | wake_up_interruptible(&skdev->waitq); | |
2878 | } | |
2879 | ||
2880 | /* assume spinlock is already held */ | |
2881 | static void skd_release_special(struct skd_device *skdev, | |
2882 | struct skd_special_context *skspcl) | |
2883 | { | |
2884 | int i, was_depleted; | |
2885 | ||
2886 | for (i = 0; i < skspcl->req.n_sg; i++) { | |
e67f86b3 AB |
2887 | struct page *page = sg_page(&skspcl->req.sg[i]); |
2888 | __free_page(page); | |
2889 | } | |
2890 | ||
2891 | was_depleted = (skdev->skspcl_free_list == NULL); | |
2892 | ||
2893 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
2894 | skspcl->req.id += SKD_ID_INCR; | |
2895 | skspcl->req.next = | |
2896 | (struct skd_request_context *)skdev->skspcl_free_list; | |
2897 | skdev->skspcl_free_list = (struct skd_special_context *)skspcl; | |
2898 | ||
2899 | if (was_depleted) { | |
2e44b427 | 2900 | pr_debug("%s:%s:%d skspcl was depleted\n", |
2901 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
2902 | /* Free list was depleted. Their might be waiters. */ |
2903 | wake_up_interruptible(&skdev->waitq); | |
2904 | } | |
2905 | } | |
2906 | ||
2907 | static void skd_reset_skcomp(struct skd_device *skdev) | |
2908 | { | |
2909 | u32 nbytes; | |
2910 | struct fit_completion_entry_v1 *skcomp; | |
2911 | ||
2912 | nbytes = sizeof(*skcomp) * SKD_N_COMPLETION_ENTRY; | |
2913 | nbytes += sizeof(struct fit_comp_error_info) * SKD_N_COMPLETION_ENTRY; | |
2914 | ||
2915 | memset(skdev->skcomp_table, 0, nbytes); | |
2916 | ||
2917 | skdev->skcomp_ix = 0; | |
2918 | skdev->skcomp_cycle = 1; | |
2919 | } | |
2920 | ||
2921 | /* | |
2922 | ***************************************************************************** | |
2923 | * INTERRUPTS | |
2924 | ***************************************************************************** | |
2925 | */ | |
2926 | static void skd_completion_worker(struct work_struct *work) | |
2927 | { | |
2928 | struct skd_device *skdev = | |
2929 | container_of(work, struct skd_device, completion_worker); | |
2930 | unsigned long flags; | |
2931 | int flush_enqueued = 0; | |
2932 | ||
2933 | spin_lock_irqsave(&skdev->lock, flags); | |
2934 | ||
2935 | /* | |
2936 | * pass in limit=0, which means no limit.. | |
2937 | * process everything in compq | |
2938 | */ | |
2939 | skd_isr_completion_posted(skdev, 0, &flush_enqueued); | |
2940 | skd_request_fn(skdev->queue); | |
2941 | ||
2942 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2943 | } | |
2944 | ||
2945 | static void skd_isr_msg_from_dev(struct skd_device *skdev); | |
2946 | ||
41c9499b AB |
2947 | static irqreturn_t |
2948 | skd_isr(int irq, void *ptr) | |
e67f86b3 AB |
2949 | { |
2950 | struct skd_device *skdev; | |
2951 | u32 intstat; | |
2952 | u32 ack; | |
2953 | int rc = 0; | |
2954 | int deferred = 0; | |
2955 | int flush_enqueued = 0; | |
2956 | ||
2957 | skdev = (struct skd_device *)ptr; | |
2958 | spin_lock(&skdev->lock); | |
2959 | ||
2960 | for (;; ) { | |
2961 | intstat = SKD_READL(skdev, FIT_INT_STATUS_HOST); | |
2962 | ||
2963 | ack = FIT_INT_DEF_MASK; | |
2964 | ack &= intstat; | |
2965 | ||
2e44b427 | 2966 | pr_debug("%s:%s:%d intstat=0x%x ack=0x%x\n", |
2967 | skdev->name, __func__, __LINE__, intstat, ack); | |
e67f86b3 AB |
2968 | |
2969 | /* As long as there is an int pending on device, keep | |
2970 | * running loop. When none, get out, but if we've never | |
2971 | * done any processing, call completion handler? | |
2972 | */ | |
2973 | if (ack == 0) { | |
2974 | /* No interrupts on device, but run the completion | |
2975 | * processor anyway? | |
2976 | */ | |
2977 | if (rc == 0) | |
2978 | if (likely (skdev->state | |
2979 | == SKD_DRVR_STATE_ONLINE)) | |
2980 | deferred = 1; | |
2981 | break; | |
2982 | } | |
2983 | ||
2984 | rc = IRQ_HANDLED; | |
2985 | ||
2986 | SKD_WRITEL(skdev, ack, FIT_INT_STATUS_HOST); | |
2987 | ||
2988 | if (likely((skdev->state != SKD_DRVR_STATE_LOAD) && | |
2989 | (skdev->state != SKD_DRVR_STATE_STOPPING))) { | |
2990 | if (intstat & FIT_ISH_COMPLETION_POSTED) { | |
2991 | /* | |
2992 | * If we have already deferred completion | |
2993 | * processing, don't bother running it again | |
2994 | */ | |
2995 | if (deferred == 0) | |
2996 | deferred = | |
2997 | skd_isr_completion_posted(skdev, | |
2998 | skd_isr_comp_limit, &flush_enqueued); | |
2999 | } | |
3000 | ||
3001 | if (intstat & FIT_ISH_FW_STATE_CHANGE) { | |
3002 | skd_isr_fwstate(skdev); | |
3003 | if (skdev->state == SKD_DRVR_STATE_FAULT || | |
3004 | skdev->state == | |
3005 | SKD_DRVR_STATE_DISAPPEARED) { | |
3006 | spin_unlock(&skdev->lock); | |
3007 | return rc; | |
3008 | } | |
3009 | } | |
3010 | ||
3011 | if (intstat & FIT_ISH_MSG_FROM_DEV) | |
3012 | skd_isr_msg_from_dev(skdev); | |
3013 | } | |
3014 | } | |
3015 | ||
3016 | if (unlikely(flush_enqueued)) | |
3017 | skd_request_fn(skdev->queue); | |
3018 | ||
3019 | if (deferred) | |
3020 | schedule_work(&skdev->completion_worker); | |
3021 | else if (!flush_enqueued) | |
3022 | skd_request_fn(skdev->queue); | |
3023 | ||
3024 | spin_unlock(&skdev->lock); | |
3025 | ||
3026 | return rc; | |
3027 | } | |
3028 | ||
e67f86b3 AB |
3029 | static void skd_drive_fault(struct skd_device *skdev) |
3030 | { | |
3031 | skdev->state = SKD_DRVR_STATE_FAULT; | |
3032 | pr_err("(%s): Drive FAULT\n", skd_name(skdev)); | |
3033 | } | |
3034 | ||
3035 | static void skd_drive_disappeared(struct skd_device *skdev) | |
3036 | { | |
3037 | skdev->state = SKD_DRVR_STATE_DISAPPEARED; | |
3038 | pr_err("(%s): Drive DISAPPEARED\n", skd_name(skdev)); | |
3039 | } | |
3040 | ||
3041 | static void skd_isr_fwstate(struct skd_device *skdev) | |
3042 | { | |
3043 | u32 sense; | |
3044 | u32 state; | |
3045 | u32 mtd; | |
3046 | int prev_driver_state = skdev->state; | |
3047 | ||
3048 | sense = SKD_READL(skdev, FIT_STATUS); | |
3049 | state = sense & FIT_SR_DRIVE_STATE_MASK; | |
3050 | ||
3051 | pr_err("(%s): s1120 state %s(%d)=>%s(%d)\n", | |
3052 | skd_name(skdev), | |
3053 | skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, | |
3054 | skd_drive_state_to_str(state), state); | |
3055 | ||
3056 | skdev->drive_state = state; | |
3057 | ||
3058 | switch (skdev->drive_state) { | |
3059 | case FIT_SR_DRIVE_INIT: | |
3060 | if (skdev->state == SKD_DRVR_STATE_PROTOCOL_MISMATCH) { | |
3061 | skd_disable_interrupts(skdev); | |
3062 | break; | |
3063 | } | |
3064 | if (skdev->state == SKD_DRVR_STATE_RESTARTING) | |
3065 | skd_recover_requests(skdev, 0); | |
3066 | if (skdev->state == SKD_DRVR_STATE_WAIT_BOOT) { | |
3067 | skdev->timer_countdown = SKD_STARTING_TIMO; | |
3068 | skdev->state = SKD_DRVR_STATE_STARTING; | |
3069 | skd_soft_reset(skdev); | |
3070 | break; | |
3071 | } | |
3072 | mtd = FIT_MXD_CONS(FIT_MTD_FITFW_INIT, 0, 0); | |
3073 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3074 | skdev->last_mtd = mtd; | |
3075 | break; | |
3076 | ||
3077 | case FIT_SR_DRIVE_ONLINE: | |
3078 | skdev->cur_max_queue_depth = skd_max_queue_depth; | |
3079 | if (skdev->cur_max_queue_depth > skdev->dev_max_queue_depth) | |
3080 | skdev->cur_max_queue_depth = skdev->dev_max_queue_depth; | |
3081 | ||
3082 | skdev->queue_low_water_mark = | |
3083 | skdev->cur_max_queue_depth * 2 / 3 + 1; | |
3084 | if (skdev->queue_low_water_mark < 1) | |
3085 | skdev->queue_low_water_mark = 1; | |
3086 | pr_info( | |
3087 | "(%s): Queue depth limit=%d dev=%d lowat=%d\n", | |
3088 | skd_name(skdev), | |
3089 | skdev->cur_max_queue_depth, | |
3090 | skdev->dev_max_queue_depth, skdev->queue_low_water_mark); | |
3091 | ||
3092 | skd_refresh_device_data(skdev); | |
3093 | break; | |
3094 | ||
3095 | case FIT_SR_DRIVE_BUSY: | |
3096 | skdev->state = SKD_DRVR_STATE_BUSY; | |
3097 | skdev->timer_countdown = SKD_BUSY_TIMO; | |
3098 | skd_quiesce_dev(skdev); | |
3099 | break; | |
3100 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
3101 | /* set timer for 3 seconds, we'll abort any unfinished | |
3102 | * commands after that expires | |
3103 | */ | |
3104 | skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; | |
3105 | skdev->timer_countdown = SKD_TIMER_SECONDS(3); | |
6a5ec65b | 3106 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3107 | break; |
3108 | case FIT_SR_DRIVE_BUSY_ERASE: | |
3109 | skdev->state = SKD_DRVR_STATE_BUSY_ERASE; | |
3110 | skdev->timer_countdown = SKD_BUSY_TIMO; | |
3111 | break; | |
3112 | case FIT_SR_DRIVE_OFFLINE: | |
3113 | skdev->state = SKD_DRVR_STATE_IDLE; | |
3114 | break; | |
3115 | case FIT_SR_DRIVE_SOFT_RESET: | |
3116 | switch (skdev->state) { | |
3117 | case SKD_DRVR_STATE_STARTING: | |
3118 | case SKD_DRVR_STATE_RESTARTING: | |
3119 | /* Expected by a caller of skd_soft_reset() */ | |
3120 | break; | |
3121 | default: | |
3122 | skdev->state = SKD_DRVR_STATE_RESTARTING; | |
3123 | break; | |
3124 | } | |
3125 | break; | |
3126 | case FIT_SR_DRIVE_FW_BOOTING: | |
2e44b427 | 3127 | pr_debug("%s:%s:%d ISR FIT_SR_DRIVE_FW_BOOTING %s\n", |
3128 | skdev->name, __func__, __LINE__, skdev->name); | |
e67f86b3 AB |
3129 | skdev->state = SKD_DRVR_STATE_WAIT_BOOT; |
3130 | skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; | |
3131 | break; | |
3132 | ||
3133 | case FIT_SR_DRIVE_DEGRADED: | |
3134 | case FIT_SR_PCIE_LINK_DOWN: | |
3135 | case FIT_SR_DRIVE_NEED_FW_DOWNLOAD: | |
3136 | break; | |
3137 | ||
3138 | case FIT_SR_DRIVE_FAULT: | |
3139 | skd_drive_fault(skdev); | |
3140 | skd_recover_requests(skdev, 0); | |
6a5ec65b | 3141 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3142 | break; |
3143 | ||
3144 | /* PCIe bus returned all Fs? */ | |
3145 | case 0xFF: | |
3146 | pr_info("(%s): state=0x%x sense=0x%x\n", | |
3147 | skd_name(skdev), state, sense); | |
3148 | skd_drive_disappeared(skdev); | |
3149 | skd_recover_requests(skdev, 0); | |
6a5ec65b | 3150 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3151 | break; |
3152 | default: | |
3153 | /* | |
3154 | * Uknown FW State. Wait for a state we recognize. | |
3155 | */ | |
3156 | break; | |
3157 | } | |
3158 | pr_err("(%s): Driver state %s(%d)=>%s(%d)\n", | |
3159 | skd_name(skdev), | |
3160 | skd_skdev_state_to_str(prev_driver_state), prev_driver_state, | |
3161 | skd_skdev_state_to_str(skdev->state), skdev->state); | |
3162 | } | |
3163 | ||
3164 | static void skd_recover_requests(struct skd_device *skdev, int requeue) | |
3165 | { | |
3166 | int i; | |
3167 | ||
3168 | for (i = 0; i < skdev->num_req_context; i++) { | |
3169 | struct skd_request_context *skreq = &skdev->skreq_table[i]; | |
3170 | ||
3171 | if (skreq->state == SKD_REQ_STATE_BUSY) { | |
3172 | skd_log_skreq(skdev, skreq, "recover"); | |
3173 | ||
3174 | SKD_ASSERT((skreq->id & SKD_ID_INCR) != 0); | |
fcd37eb3 | 3175 | SKD_ASSERT(skreq->req != NULL); |
e67f86b3 AB |
3176 | |
3177 | /* Release DMA resources for the request. */ | |
3178 | if (skreq->n_sg > 0) | |
3179 | skd_postop_sg_list(skdev, skreq); | |
3180 | ||
fcd37eb3 JA |
3181 | if (requeue && |
3182 | (unsigned long) ++skreq->req->special < | |
3183 | SKD_MAX_RETRIES) | |
38d4a1bb | 3184 | blk_requeue_request(skdev->queue, skreq->req); |
fcd37eb3 | 3185 | else |
e67f86b3 AB |
3186 | skd_end_request(skdev, skreq, -EIO); |
3187 | ||
fcd37eb3 | 3188 | skreq->req = NULL; |
e67f86b3 AB |
3189 | |
3190 | skreq->state = SKD_REQ_STATE_IDLE; | |
3191 | skreq->id += SKD_ID_INCR; | |
e67f86b3 AB |
3192 | } |
3193 | if (i > 0) | |
3194 | skreq[-1].next = skreq; | |
3195 | skreq->next = NULL; | |
3196 | } | |
3197 | skdev->skreq_free_list = skdev->skreq_table; | |
3198 | ||
3199 | for (i = 0; i < skdev->num_fitmsg_context; i++) { | |
3200 | struct skd_fitmsg_context *skmsg = &skdev->skmsg_table[i]; | |
3201 | ||
3202 | if (skmsg->state == SKD_MSG_STATE_BUSY) { | |
3203 | skd_log_skmsg(skdev, skmsg, "salvaged"); | |
3204 | SKD_ASSERT((skmsg->id & SKD_ID_INCR) != 0); | |
3205 | skmsg->state = SKD_MSG_STATE_IDLE; | |
3206 | skmsg->id += SKD_ID_INCR; | |
3207 | } | |
3208 | if (i > 0) | |
3209 | skmsg[-1].next = skmsg; | |
3210 | skmsg->next = NULL; | |
3211 | } | |
3212 | skdev->skmsg_free_list = skdev->skmsg_table; | |
3213 | ||
3214 | for (i = 0; i < skdev->n_special; i++) { | |
3215 | struct skd_special_context *skspcl = &skdev->skspcl_table[i]; | |
3216 | ||
3217 | /* If orphaned, reclaim it because it has already been reported | |
3218 | * to the process as an error (it was just waiting for | |
3219 | * a completion that didn't come, and now it will never come) | |
3220 | * If busy, change to a state that will cause it to error | |
3221 | * out in the wait routine and let it do the normal | |
3222 | * reporting and reclaiming | |
3223 | */ | |
3224 | if (skspcl->req.state == SKD_REQ_STATE_BUSY) { | |
3225 | if (skspcl->orphaned) { | |
2e44b427 | 3226 | pr_debug("%s:%s:%d orphaned %p\n", |
3227 | skdev->name, __func__, __LINE__, | |
3228 | skspcl); | |
e67f86b3 AB |
3229 | skd_release_special(skdev, skspcl); |
3230 | } else { | |
2e44b427 | 3231 | pr_debug("%s:%s:%d not orphaned %p\n", |
3232 | skdev->name, __func__, __LINE__, | |
3233 | skspcl); | |
e67f86b3 AB |
3234 | skspcl->req.state = SKD_REQ_STATE_ABORTED; |
3235 | } | |
3236 | } | |
3237 | } | |
3238 | skdev->skspcl_free_list = skdev->skspcl_table; | |
3239 | ||
3240 | for (i = 0; i < SKD_N_TIMEOUT_SLOT; i++) | |
3241 | skdev->timeout_slot[i] = 0; | |
3242 | ||
3243 | skdev->in_flight = 0; | |
3244 | } | |
3245 | ||
3246 | static void skd_isr_msg_from_dev(struct skd_device *skdev) | |
3247 | { | |
3248 | u32 mfd; | |
3249 | u32 mtd; | |
3250 | u32 data; | |
3251 | ||
3252 | mfd = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); | |
3253 | ||
2e44b427 | 3254 | pr_debug("%s:%s:%d mfd=0x%x last_mtd=0x%x\n", |
3255 | skdev->name, __func__, __LINE__, mfd, skdev->last_mtd); | |
e67f86b3 AB |
3256 | |
3257 | /* ignore any mtd that is an ack for something we didn't send */ | |
3258 | if (FIT_MXD_TYPE(mfd) != FIT_MXD_TYPE(skdev->last_mtd)) | |
3259 | return; | |
3260 | ||
3261 | switch (FIT_MXD_TYPE(mfd)) { | |
3262 | case FIT_MTD_FITFW_INIT: | |
3263 | skdev->proto_ver = FIT_PROTOCOL_MAJOR_VER(mfd); | |
3264 | ||
3265 | if (skdev->proto_ver != FIT_PROTOCOL_VERSION_1) { | |
3266 | pr_err("(%s): protocol mismatch\n", | |
3267 | skdev->name); | |
3268 | pr_err("(%s): got=%d support=%d\n", | |
3269 | skdev->name, skdev->proto_ver, | |
3270 | FIT_PROTOCOL_VERSION_1); | |
3271 | pr_err("(%s): please upgrade driver\n", | |
3272 | skdev->name); | |
3273 | skdev->state = SKD_DRVR_STATE_PROTOCOL_MISMATCH; | |
3274 | skd_soft_reset(skdev); | |
3275 | break; | |
3276 | } | |
3277 | mtd = FIT_MXD_CONS(FIT_MTD_GET_CMDQ_DEPTH, 0, 0); | |
3278 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3279 | skdev->last_mtd = mtd; | |
3280 | break; | |
3281 | ||
3282 | case FIT_MTD_GET_CMDQ_DEPTH: | |
3283 | skdev->dev_max_queue_depth = FIT_MXD_DATA(mfd); | |
3284 | mtd = FIT_MXD_CONS(FIT_MTD_SET_COMPQ_DEPTH, 0, | |
3285 | SKD_N_COMPLETION_ENTRY); | |
3286 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3287 | skdev->last_mtd = mtd; | |
3288 | break; | |
3289 | ||
3290 | case FIT_MTD_SET_COMPQ_DEPTH: | |
3291 | SKD_WRITEQ(skdev, skdev->cq_dma_address, FIT_MSG_TO_DEVICE_ARG); | |
3292 | mtd = FIT_MXD_CONS(FIT_MTD_SET_COMPQ_ADDR, 0, 0); | |
3293 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3294 | skdev->last_mtd = mtd; | |
3295 | break; | |
3296 | ||
3297 | case FIT_MTD_SET_COMPQ_ADDR: | |
3298 | skd_reset_skcomp(skdev); | |
3299 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_HOST_ID, 0, skdev->devno); | |
3300 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3301 | skdev->last_mtd = mtd; | |
3302 | break; | |
3303 | ||
3304 | case FIT_MTD_CMD_LOG_HOST_ID: | |
3305 | skdev->connect_time_stamp = get_seconds(); | |
3306 | data = skdev->connect_time_stamp & 0xFFFF; | |
3307 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_LO, 0, data); | |
3308 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3309 | skdev->last_mtd = mtd; | |
3310 | break; | |
3311 | ||
3312 | case FIT_MTD_CMD_LOG_TIME_STAMP_LO: | |
3313 | skdev->drive_jiffies = FIT_MXD_DATA(mfd); | |
3314 | data = (skdev->connect_time_stamp >> 16) & 0xFFFF; | |
3315 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_HI, 0, data); | |
3316 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3317 | skdev->last_mtd = mtd; | |
3318 | break; | |
3319 | ||
3320 | case FIT_MTD_CMD_LOG_TIME_STAMP_HI: | |
3321 | skdev->drive_jiffies |= (FIT_MXD_DATA(mfd) << 16); | |
3322 | mtd = FIT_MXD_CONS(FIT_MTD_ARM_QUEUE, 0, 0); | |
3323 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
3324 | skdev->last_mtd = mtd; | |
3325 | ||
3326 | pr_err("(%s): Time sync driver=0x%x device=0x%x\n", | |
3327 | skd_name(skdev), | |
3328 | skdev->connect_time_stamp, skdev->drive_jiffies); | |
3329 | break; | |
3330 | ||
3331 | case FIT_MTD_ARM_QUEUE: | |
3332 | skdev->last_mtd = 0; | |
3333 | /* | |
3334 | * State should be, or soon will be, FIT_SR_DRIVE_ONLINE. | |
3335 | */ | |
3336 | break; | |
3337 | ||
3338 | default: | |
3339 | break; | |
3340 | } | |
3341 | } | |
3342 | ||
3343 | static void skd_disable_interrupts(struct skd_device *skdev) | |
3344 | { | |
3345 | u32 sense; | |
3346 | ||
3347 | sense = SKD_READL(skdev, FIT_CONTROL); | |
3348 | sense &= ~FIT_CR_ENABLE_INTERRUPTS; | |
3349 | SKD_WRITEL(skdev, sense, FIT_CONTROL); | |
2e44b427 | 3350 | pr_debug("%s:%s:%d sense 0x%x\n", |
3351 | skdev->name, __func__, __LINE__, sense); | |
e67f86b3 AB |
3352 | |
3353 | /* Note that the 1s is written. A 1-bit means | |
3354 | * disable, a 0 means enable. | |
3355 | */ | |
3356 | SKD_WRITEL(skdev, ~0, FIT_INT_MASK_HOST); | |
3357 | } | |
3358 | ||
3359 | static void skd_enable_interrupts(struct skd_device *skdev) | |
3360 | { | |
3361 | u32 val; | |
3362 | ||
3363 | /* unmask interrupts first */ | |
3364 | val = FIT_ISH_FW_STATE_CHANGE + | |
3365 | FIT_ISH_COMPLETION_POSTED + FIT_ISH_MSG_FROM_DEV; | |
3366 | ||
3367 | /* Note that the compliment of mask is written. A 1-bit means | |
3368 | * disable, a 0 means enable. */ | |
3369 | SKD_WRITEL(skdev, ~val, FIT_INT_MASK_HOST); | |
2e44b427 | 3370 | pr_debug("%s:%s:%d interrupt mask=0x%x\n", |
3371 | skdev->name, __func__, __LINE__, ~val); | |
e67f86b3 AB |
3372 | |
3373 | val = SKD_READL(skdev, FIT_CONTROL); | |
3374 | val |= FIT_CR_ENABLE_INTERRUPTS; | |
2e44b427 | 3375 | pr_debug("%s:%s:%d control=0x%x\n", |
3376 | skdev->name, __func__, __LINE__, val); | |
e67f86b3 AB |
3377 | SKD_WRITEL(skdev, val, FIT_CONTROL); |
3378 | } | |
3379 | ||
3380 | /* | |
3381 | ***************************************************************************** | |
3382 | * START, STOP, RESTART, QUIESCE, UNQUIESCE | |
3383 | ***************************************************************************** | |
3384 | */ | |
3385 | ||
3386 | static void skd_soft_reset(struct skd_device *skdev) | |
3387 | { | |
3388 | u32 val; | |
3389 | ||
3390 | val = SKD_READL(skdev, FIT_CONTROL); | |
3391 | val |= (FIT_CR_SOFT_RESET); | |
2e44b427 | 3392 | pr_debug("%s:%s:%d control=0x%x\n", |
3393 | skdev->name, __func__, __LINE__, val); | |
e67f86b3 AB |
3394 | SKD_WRITEL(skdev, val, FIT_CONTROL); |
3395 | } | |
3396 | ||
3397 | static void skd_start_device(struct skd_device *skdev) | |
3398 | { | |
3399 | unsigned long flags; | |
3400 | u32 sense; | |
3401 | u32 state; | |
3402 | ||
3403 | spin_lock_irqsave(&skdev->lock, flags); | |
3404 | ||
3405 | /* ack all ghost interrupts */ | |
3406 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
3407 | ||
3408 | sense = SKD_READL(skdev, FIT_STATUS); | |
3409 | ||
2e44b427 | 3410 | pr_debug("%s:%s:%d initial status=0x%x\n", |
3411 | skdev->name, __func__, __LINE__, sense); | |
e67f86b3 AB |
3412 | |
3413 | state = sense & FIT_SR_DRIVE_STATE_MASK; | |
3414 | skdev->drive_state = state; | |
3415 | skdev->last_mtd = 0; | |
3416 | ||
3417 | skdev->state = SKD_DRVR_STATE_STARTING; | |
3418 | skdev->timer_countdown = SKD_STARTING_TIMO; | |
3419 | ||
3420 | skd_enable_interrupts(skdev); | |
3421 | ||
3422 | switch (skdev->drive_state) { | |
3423 | case FIT_SR_DRIVE_OFFLINE: | |
3424 | pr_err("(%s): Drive offline...\n", skd_name(skdev)); | |
3425 | break; | |
3426 | ||
3427 | case FIT_SR_DRIVE_FW_BOOTING: | |
2e44b427 | 3428 | pr_debug("%s:%s:%d FIT_SR_DRIVE_FW_BOOTING %s\n", |
3429 | skdev->name, __func__, __LINE__, skdev->name); | |
e67f86b3 AB |
3430 | skdev->state = SKD_DRVR_STATE_WAIT_BOOT; |
3431 | skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; | |
3432 | break; | |
3433 | ||
3434 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
3435 | pr_info("(%s): Start: BUSY_SANITIZE\n", | |
3436 | skd_name(skdev)); | |
3437 | skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; | |
3438 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
3439 | break; | |
3440 | ||
3441 | case FIT_SR_DRIVE_BUSY_ERASE: | |
3442 | pr_info("(%s): Start: BUSY_ERASE\n", skd_name(skdev)); | |
3443 | skdev->state = SKD_DRVR_STATE_BUSY_ERASE; | |
3444 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
3445 | break; | |
3446 | ||
3447 | case FIT_SR_DRIVE_INIT: | |
3448 | case FIT_SR_DRIVE_ONLINE: | |
3449 | skd_soft_reset(skdev); | |
3450 | break; | |
3451 | ||
3452 | case FIT_SR_DRIVE_BUSY: | |
3453 | pr_err("(%s): Drive Busy...\n", skd_name(skdev)); | |
3454 | skdev->state = SKD_DRVR_STATE_BUSY; | |
3455 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
3456 | break; | |
3457 | ||
3458 | case FIT_SR_DRIVE_SOFT_RESET: | |
3459 | pr_err("(%s) drive soft reset in prog\n", | |
3460 | skd_name(skdev)); | |
3461 | break; | |
3462 | ||
3463 | case FIT_SR_DRIVE_FAULT: | |
3464 | /* Fault state is bad...soft reset won't do it... | |
3465 | * Hard reset, maybe, but does it work on device? | |
3466 | * For now, just fault so the system doesn't hang. | |
3467 | */ | |
3468 | skd_drive_fault(skdev); | |
3469 | /*start the queue so we can respond with error to requests */ | |
2e44b427 | 3470 | pr_debug("%s:%s:%d starting %s queue\n", |
3471 | skdev->name, __func__, __LINE__, skdev->name); | |
6a5ec65b | 3472 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3473 | skdev->gendisk_on = -1; |
3474 | wake_up_interruptible(&skdev->waitq); | |
3475 | break; | |
3476 | ||
3477 | case 0xFF: | |
3478 | /* Most likely the device isn't there or isn't responding | |
3479 | * to the BAR1 addresses. */ | |
3480 | skd_drive_disappeared(skdev); | |
3481 | /*start the queue so we can respond with error to requests */ | |
2e44b427 | 3482 | pr_debug("%s:%s:%d starting %s queue to error-out reqs\n", |
3483 | skdev->name, __func__, __LINE__, skdev->name); | |
6a5ec65b | 3484 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3485 | skdev->gendisk_on = -1; |
3486 | wake_up_interruptible(&skdev->waitq); | |
3487 | break; | |
3488 | ||
3489 | default: | |
3490 | pr_err("(%s) Start: unknown state %x\n", | |
3491 | skd_name(skdev), skdev->drive_state); | |
3492 | break; | |
3493 | } | |
3494 | ||
3495 | state = SKD_READL(skdev, FIT_CONTROL); | |
2e44b427 | 3496 | pr_debug("%s:%s:%d FIT Control Status=0x%x\n", |
3497 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3498 | |
3499 | state = SKD_READL(skdev, FIT_INT_STATUS_HOST); | |
2e44b427 | 3500 | pr_debug("%s:%s:%d Intr Status=0x%x\n", |
3501 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3502 | |
3503 | state = SKD_READL(skdev, FIT_INT_MASK_HOST); | |
2e44b427 | 3504 | pr_debug("%s:%s:%d Intr Mask=0x%x\n", |
3505 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3506 | |
3507 | state = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); | |
2e44b427 | 3508 | pr_debug("%s:%s:%d Msg from Dev=0x%x\n", |
3509 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3510 | |
3511 | state = SKD_READL(skdev, FIT_HW_VERSION); | |
2e44b427 | 3512 | pr_debug("%s:%s:%d HW version=0x%x\n", |
3513 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3514 | |
3515 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3516 | } | |
3517 | ||
3518 | static void skd_stop_device(struct skd_device *skdev) | |
3519 | { | |
3520 | unsigned long flags; | |
3521 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
3522 | u32 dev_state; | |
3523 | int i; | |
3524 | ||
3525 | spin_lock_irqsave(&skdev->lock, flags); | |
3526 | ||
3527 | if (skdev->state != SKD_DRVR_STATE_ONLINE) { | |
3528 | pr_err("(%s): skd_stop_device not online no sync\n", | |
3529 | skd_name(skdev)); | |
3530 | goto stop_out; | |
3531 | } | |
3532 | ||
3533 | if (skspcl->req.state != SKD_REQ_STATE_IDLE) { | |
3534 | pr_err("(%s): skd_stop_device no special\n", | |
3535 | skd_name(skdev)); | |
3536 | goto stop_out; | |
3537 | } | |
3538 | ||
3539 | skdev->state = SKD_DRVR_STATE_SYNCING; | |
3540 | skdev->sync_done = 0; | |
3541 | ||
3542 | skd_send_internal_skspcl(skdev, skspcl, SYNCHRONIZE_CACHE); | |
3543 | ||
3544 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3545 | ||
3546 | wait_event_interruptible_timeout(skdev->waitq, | |
3547 | (skdev->sync_done), (10 * HZ)); | |
3548 | ||
3549 | spin_lock_irqsave(&skdev->lock, flags); | |
3550 | ||
3551 | switch (skdev->sync_done) { | |
3552 | case 0: | |
3553 | pr_err("(%s): skd_stop_device no sync\n", | |
3554 | skd_name(skdev)); | |
3555 | break; | |
3556 | case 1: | |
3557 | pr_err("(%s): skd_stop_device sync done\n", | |
3558 | skd_name(skdev)); | |
3559 | break; | |
3560 | default: | |
3561 | pr_err("(%s): skd_stop_device sync error\n", | |
3562 | skd_name(skdev)); | |
3563 | } | |
3564 | ||
3565 | stop_out: | |
3566 | skdev->state = SKD_DRVR_STATE_STOPPING; | |
3567 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3568 | ||
3569 | skd_kill_timer(skdev); | |
3570 | ||
3571 | spin_lock_irqsave(&skdev->lock, flags); | |
3572 | skd_disable_interrupts(skdev); | |
3573 | ||
3574 | /* ensure all ints on device are cleared */ | |
3575 | /* soft reset the device to unload with a clean slate */ | |
3576 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
3577 | SKD_WRITEL(skdev, FIT_CR_SOFT_RESET, FIT_CONTROL); | |
3578 | ||
3579 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3580 | ||
3581 | /* poll every 100ms, 1 second timeout */ | |
3582 | for (i = 0; i < 10; i++) { | |
3583 | dev_state = | |
3584 | SKD_READL(skdev, FIT_STATUS) & FIT_SR_DRIVE_STATE_MASK; | |
3585 | if (dev_state == FIT_SR_DRIVE_INIT) | |
3586 | break; | |
3587 | set_current_state(TASK_INTERRUPTIBLE); | |
3588 | schedule_timeout(msecs_to_jiffies(100)); | |
3589 | } | |
3590 | ||
3591 | if (dev_state != FIT_SR_DRIVE_INIT) | |
3592 | pr_err("(%s): skd_stop_device state error 0x%02x\n", | |
3593 | skd_name(skdev), dev_state); | |
3594 | } | |
3595 | ||
3596 | /* assume spinlock is held */ | |
3597 | static void skd_restart_device(struct skd_device *skdev) | |
3598 | { | |
3599 | u32 state; | |
3600 | ||
3601 | /* ack all ghost interrupts */ | |
3602 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
3603 | ||
3604 | state = SKD_READL(skdev, FIT_STATUS); | |
3605 | ||
2e44b427 | 3606 | pr_debug("%s:%s:%d drive status=0x%x\n", |
3607 | skdev->name, __func__, __LINE__, state); | |
e67f86b3 AB |
3608 | |
3609 | state &= FIT_SR_DRIVE_STATE_MASK; | |
3610 | skdev->drive_state = state; | |
3611 | skdev->last_mtd = 0; | |
3612 | ||
3613 | skdev->state = SKD_DRVR_STATE_RESTARTING; | |
3614 | skdev->timer_countdown = SKD_RESTARTING_TIMO; | |
3615 | ||
3616 | skd_soft_reset(skdev); | |
3617 | } | |
3618 | ||
3619 | /* assume spinlock is held */ | |
3620 | static int skd_quiesce_dev(struct skd_device *skdev) | |
3621 | { | |
3622 | int rc = 0; | |
3623 | ||
3624 | switch (skdev->state) { | |
3625 | case SKD_DRVR_STATE_BUSY: | |
3626 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
2e44b427 | 3627 | pr_debug("%s:%s:%d stopping %s queue\n", |
3628 | skdev->name, __func__, __LINE__, skdev->name); | |
6a5ec65b | 3629 | blk_stop_queue(skdev->queue); |
e67f86b3 AB |
3630 | break; |
3631 | case SKD_DRVR_STATE_ONLINE: | |
3632 | case SKD_DRVR_STATE_STOPPING: | |
3633 | case SKD_DRVR_STATE_SYNCING: | |
3634 | case SKD_DRVR_STATE_PAUSING: | |
3635 | case SKD_DRVR_STATE_PAUSED: | |
3636 | case SKD_DRVR_STATE_STARTING: | |
3637 | case SKD_DRVR_STATE_RESTARTING: | |
3638 | case SKD_DRVR_STATE_RESUMING: | |
3639 | default: | |
3640 | rc = -EINVAL; | |
2e44b427 | 3641 | pr_debug("%s:%s:%d state [%d] not implemented\n", |
3642 | skdev->name, __func__, __LINE__, skdev->state); | |
e67f86b3 AB |
3643 | } |
3644 | return rc; | |
3645 | } | |
3646 | ||
3647 | /* assume spinlock is held */ | |
3648 | static int skd_unquiesce_dev(struct skd_device *skdev) | |
3649 | { | |
3650 | int prev_driver_state = skdev->state; | |
3651 | ||
3652 | skd_log_skdev(skdev, "unquiesce"); | |
3653 | if (skdev->state == SKD_DRVR_STATE_ONLINE) { | |
2e44b427 | 3654 | pr_debug("%s:%s:%d **** device already ONLINE\n", |
3655 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
3656 | return 0; |
3657 | } | |
3658 | if (skdev->drive_state != FIT_SR_DRIVE_ONLINE) { | |
3659 | /* | |
3660 | * If there has been an state change to other than | |
3661 | * ONLINE, we will rely on controller state change | |
3662 | * to come back online and restart the queue. | |
3663 | * The BUSY state means that driver is ready to | |
3664 | * continue normal processing but waiting for controller | |
3665 | * to become available. | |
3666 | */ | |
3667 | skdev->state = SKD_DRVR_STATE_BUSY; | |
2e44b427 | 3668 | pr_debug("%s:%s:%d drive BUSY state\n", |
3669 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
3670 | return 0; |
3671 | } | |
3672 | ||
3673 | /* | |
3674 | * Drive has just come online, driver is either in startup, | |
3675 | * paused performing a task, or bust waiting for hardware. | |
3676 | */ | |
3677 | switch (skdev->state) { | |
3678 | case SKD_DRVR_STATE_PAUSED: | |
3679 | case SKD_DRVR_STATE_BUSY: | |
3680 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
3681 | case SKD_DRVR_STATE_BUSY_ERASE: | |
3682 | case SKD_DRVR_STATE_STARTING: | |
3683 | case SKD_DRVR_STATE_RESTARTING: | |
3684 | case SKD_DRVR_STATE_FAULT: | |
3685 | case SKD_DRVR_STATE_IDLE: | |
3686 | case SKD_DRVR_STATE_LOAD: | |
3687 | skdev->state = SKD_DRVR_STATE_ONLINE; | |
3688 | pr_err("(%s): Driver state %s(%d)=>%s(%d)\n", | |
3689 | skd_name(skdev), | |
3690 | skd_skdev_state_to_str(prev_driver_state), | |
3691 | prev_driver_state, skd_skdev_state_to_str(skdev->state), | |
3692 | skdev->state); | |
2e44b427 | 3693 | pr_debug("%s:%s:%d **** device ONLINE...starting block queue\n", |
3694 | skdev->name, __func__, __LINE__); | |
3695 | pr_debug("%s:%s:%d starting %s queue\n", | |
3696 | skdev->name, __func__, __LINE__, skdev->name); | |
e67f86b3 | 3697 | pr_info("(%s): STEC s1120 ONLINE\n", skd_name(skdev)); |
6a5ec65b | 3698 | blk_start_queue(skdev->queue); |
e67f86b3 AB |
3699 | skdev->gendisk_on = 1; |
3700 | wake_up_interruptible(&skdev->waitq); | |
3701 | break; | |
3702 | ||
3703 | case SKD_DRVR_STATE_DISAPPEARED: | |
3704 | default: | |
2e44b427 | 3705 | pr_debug("%s:%s:%d **** driver state %d, not implemented \n", |
3706 | skdev->name, __func__, __LINE__, | |
3707 | skdev->state); | |
e67f86b3 AB |
3708 | return -EBUSY; |
3709 | } | |
3710 | return 0; | |
3711 | } | |
3712 | ||
3713 | /* | |
3714 | ***************************************************************************** | |
3715 | * PCIe MSI/MSI-X INTERRUPT HANDLERS | |
3716 | ***************************************************************************** | |
3717 | */ | |
3718 | ||
3719 | static irqreturn_t skd_reserved_isr(int irq, void *skd_host_data) | |
3720 | { | |
3721 | struct skd_device *skdev = skd_host_data; | |
3722 | unsigned long flags; | |
3723 | ||
3724 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3725 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3726 | skdev->name, __func__, __LINE__, | |
3727 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3728 | pr_err("(%s): MSIX reserved irq %d = 0x%x\n", skd_name(skdev), |
3729 | irq, SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
3730 | SKD_WRITEL(skdev, FIT_INT_RESERVED_MASK, FIT_INT_STATUS_HOST); | |
3731 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3732 | return IRQ_HANDLED; | |
3733 | } | |
3734 | ||
3735 | static irqreturn_t skd_statec_isr(int irq, void *skd_host_data) | |
3736 | { | |
3737 | struct skd_device *skdev = skd_host_data; | |
3738 | unsigned long flags; | |
3739 | ||
3740 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3741 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3742 | skdev->name, __func__, __LINE__, | |
3743 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3744 | SKD_WRITEL(skdev, FIT_ISH_FW_STATE_CHANGE, FIT_INT_STATUS_HOST); |
3745 | skd_isr_fwstate(skdev); | |
3746 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3747 | return IRQ_HANDLED; | |
3748 | } | |
3749 | ||
3750 | static irqreturn_t skd_comp_q(int irq, void *skd_host_data) | |
3751 | { | |
3752 | struct skd_device *skdev = skd_host_data; | |
3753 | unsigned long flags; | |
3754 | int flush_enqueued = 0; | |
3755 | int deferred; | |
3756 | ||
3757 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3758 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3759 | skdev->name, __func__, __LINE__, | |
3760 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3761 | SKD_WRITEL(skdev, FIT_ISH_COMPLETION_POSTED, FIT_INT_STATUS_HOST); |
3762 | deferred = skd_isr_completion_posted(skdev, skd_isr_comp_limit, | |
3763 | &flush_enqueued); | |
e67f86b3 AB |
3764 | if (flush_enqueued) |
3765 | skd_request_fn(skdev->queue); | |
3766 | ||
3767 | if (deferred) | |
3768 | schedule_work(&skdev->completion_worker); | |
3769 | else if (!flush_enqueued) | |
3770 | skd_request_fn(skdev->queue); | |
3771 | ||
3772 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3773 | ||
3774 | return IRQ_HANDLED; | |
3775 | } | |
3776 | ||
3777 | static irqreturn_t skd_msg_isr(int irq, void *skd_host_data) | |
3778 | { | |
3779 | struct skd_device *skdev = skd_host_data; | |
3780 | unsigned long flags; | |
3781 | ||
3782 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3783 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3784 | skdev->name, __func__, __LINE__, | |
3785 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3786 | SKD_WRITEL(skdev, FIT_ISH_MSG_FROM_DEV, FIT_INT_STATUS_HOST); |
3787 | skd_isr_msg_from_dev(skdev); | |
3788 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3789 | return IRQ_HANDLED; | |
3790 | } | |
3791 | ||
3792 | static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data) | |
3793 | { | |
3794 | struct skd_device *skdev = skd_host_data; | |
3795 | unsigned long flags; | |
3796 | ||
3797 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 3798 | pr_debug("%s:%s:%d MSIX = 0x%x\n", |
3799 | skdev->name, __func__, __LINE__, | |
3800 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
3801 | SKD_WRITEL(skdev, FIT_INT_QUEUE_FULL, FIT_INT_STATUS_HOST); |
3802 | spin_unlock_irqrestore(&skdev->lock, flags); | |
3803 | return IRQ_HANDLED; | |
3804 | } | |
3805 | ||
3806 | /* | |
3807 | ***************************************************************************** | |
3808 | * PCIe MSI/MSI-X SETUP | |
3809 | ***************************************************************************** | |
3810 | */ | |
3811 | ||
3812 | struct skd_msix_entry { | |
e67f86b3 AB |
3813 | char isr_name[30]; |
3814 | }; | |
3815 | ||
3816 | struct skd_init_msix_entry { | |
3817 | const char *name; | |
3818 | irq_handler_t handler; | |
3819 | }; | |
3820 | ||
3821 | #define SKD_MAX_MSIX_COUNT 13 | |
3822 | #define SKD_MIN_MSIX_COUNT 7 | |
3823 | #define SKD_BASE_MSIX_IRQ 4 | |
3824 | ||
3825 | static struct skd_init_msix_entry msix_entries[SKD_MAX_MSIX_COUNT] = { | |
3826 | { "(DMA 0)", skd_reserved_isr }, | |
3827 | { "(DMA 1)", skd_reserved_isr }, | |
3828 | { "(DMA 2)", skd_reserved_isr }, | |
3829 | { "(DMA 3)", skd_reserved_isr }, | |
3830 | { "(State Change)", skd_statec_isr }, | |
3831 | { "(COMPL_Q)", skd_comp_q }, | |
3832 | { "(MSG)", skd_msg_isr }, | |
3833 | { "(Reserved)", skd_reserved_isr }, | |
3834 | { "(Reserved)", skd_reserved_isr }, | |
3835 | { "(Queue Full 0)", skd_qfull_isr }, | |
3836 | { "(Queue Full 1)", skd_qfull_isr }, | |
3837 | { "(Queue Full 2)", skd_qfull_isr }, | |
3838 | { "(Queue Full 3)", skd_qfull_isr }, | |
3839 | }; | |
3840 | ||
e67f86b3 AB |
3841 | static int skd_acquire_msix(struct skd_device *skdev) |
3842 | { | |
a9df8625 | 3843 | int i, rc; |
46817769 | 3844 | struct pci_dev *pdev = skdev->pdev; |
e67f86b3 | 3845 | |
180b0ae7 CH |
3846 | rc = pci_alloc_irq_vectors(pdev, SKD_MAX_MSIX_COUNT, SKD_MAX_MSIX_COUNT, |
3847 | PCI_IRQ_MSIX); | |
3848 | if (rc < 0) { | |
a9df8625 AG |
3849 | pr_err("(%s): failed to enable MSI-X %d\n", |
3850 | skd_name(skdev), rc); | |
3bc8492f | 3851 | goto out; |
e67f86b3 | 3852 | } |
46817769 | 3853 | |
180b0ae7 CH |
3854 | skdev->msix_entries = kcalloc(SKD_MAX_MSIX_COUNT, |
3855 | sizeof(struct skd_msix_entry), GFP_KERNEL); | |
e67f86b3 AB |
3856 | if (!skdev->msix_entries) { |
3857 | rc = -ENOMEM; | |
e67f86b3 AB |
3858 | pr_err("(%s): msix table allocation error\n", |
3859 | skd_name(skdev)); | |
3bc8492f | 3860 | goto out; |
e67f86b3 AB |
3861 | } |
3862 | ||
e67f86b3 | 3863 | /* Enable MSI-X vectors for the base queue */ |
180b0ae7 CH |
3864 | for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { |
3865 | struct skd_msix_entry *qentry = &skdev->msix_entries[i]; | |
3866 | ||
e67f86b3 AB |
3867 | snprintf(qentry->isr_name, sizeof(qentry->isr_name), |
3868 | "%s%d-msix %s", DRV_NAME, skdev->devno, | |
3869 | msix_entries[i].name); | |
180b0ae7 CH |
3870 | |
3871 | rc = devm_request_irq(&skdev->pdev->dev, | |
3872 | pci_irq_vector(skdev->pdev, i), | |
3873 | msix_entries[i].handler, 0, | |
3874 | qentry->isr_name, skdev); | |
e67f86b3 AB |
3875 | if (rc) { |
3876 | pr_err("(%s): Unable to register(%d) MSI-X " | |
3877 | "handler %d: %s\n", | |
3878 | skd_name(skdev), rc, i, qentry->isr_name); | |
3879 | goto msix_out; | |
e67f86b3 AB |
3880 | } |
3881 | } | |
180b0ae7 | 3882 | |
2e44b427 | 3883 | pr_debug("%s:%s:%d %s: <%s> msix %d irq(s) enabled\n", |
3884 | skdev->name, __func__, __LINE__, | |
180b0ae7 | 3885 | pci_name(pdev), skdev->name, SKD_MAX_MSIX_COUNT); |
e67f86b3 AB |
3886 | return 0; |
3887 | ||
3888 | msix_out: | |
180b0ae7 CH |
3889 | while (--i >= 0) |
3890 | devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), skdev); | |
3bc8492f | 3891 | out: |
180b0ae7 CH |
3892 | kfree(skdev->msix_entries); |
3893 | skdev->msix_entries = NULL; | |
e67f86b3 AB |
3894 | return rc; |
3895 | } | |
3896 | ||
3897 | static int skd_acquire_irq(struct skd_device *skdev) | |
3898 | { | |
180b0ae7 CH |
3899 | struct pci_dev *pdev = skdev->pdev; |
3900 | unsigned int irq_flag = PCI_IRQ_LEGACY; | |
e67f86b3 | 3901 | int rc; |
e67f86b3 | 3902 | |
180b0ae7 | 3903 | if (skd_isr_type == SKD_IRQ_MSIX) { |
e67f86b3 AB |
3904 | rc = skd_acquire_msix(skdev); |
3905 | if (!rc) | |
180b0ae7 CH |
3906 | return 0; |
3907 | ||
3908 | pr_err("(%s): failed to enable MSI-X, re-trying with MSI %d\n", | |
3909 | skd_name(skdev), rc); | |
e67f86b3 | 3910 | } |
180b0ae7 CH |
3911 | |
3912 | snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d", DRV_NAME, | |
3913 | skdev->devno); | |
3914 | ||
3915 | if (skd_isr_type != SKD_IRQ_LEGACY) | |
3916 | irq_flag |= PCI_IRQ_MSI; | |
3917 | rc = pci_alloc_irq_vectors(pdev, 1, 1, irq_flag); | |
3918 | if (rc < 0) { | |
3919 | pr_err("(%s): failed to allocate the MSI interrupt %d\n", | |
3920 | skd_name(skdev), rc); | |
3921 | return rc; | |
3922 | } | |
3923 | ||
3924 | rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, | |
3925 | pdev->msi_enabled ? 0 : IRQF_SHARED, | |
3926 | skdev->isr_name, skdev); | |
3927 | if (rc) { | |
3928 | pci_free_irq_vectors(pdev); | |
3929 | pr_err("(%s): failed to allocate interrupt %d\n", | |
3930 | skd_name(skdev), rc); | |
3931 | return rc; | |
3932 | } | |
3933 | ||
3934 | return 0; | |
e67f86b3 AB |
3935 | } |
3936 | ||
3937 | static void skd_release_irq(struct skd_device *skdev) | |
3938 | { | |
180b0ae7 CH |
3939 | struct pci_dev *pdev = skdev->pdev; |
3940 | ||
3941 | if (skdev->msix_entries) { | |
3942 | int i; | |
3943 | ||
3944 | for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { | |
3945 | devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), | |
3946 | skdev); | |
3947 | } | |
3948 | ||
3949 | kfree(skdev->msix_entries); | |
3950 | skdev->msix_entries = NULL; | |
3951 | } else { | |
3952 | devm_free_irq(&pdev->dev, pdev->irq, skdev); | |
e67f86b3 | 3953 | } |
180b0ae7 CH |
3954 | |
3955 | pci_free_irq_vectors(pdev); | |
e67f86b3 AB |
3956 | } |
3957 | ||
3958 | /* | |
3959 | ***************************************************************************** | |
3960 | * CONSTRUCT | |
3961 | ***************************************************************************** | |
3962 | */ | |
3963 | ||
e67f86b3 AB |
3964 | static int skd_cons_skcomp(struct skd_device *skdev) |
3965 | { | |
3966 | int rc = 0; | |
3967 | struct fit_completion_entry_v1 *skcomp; | |
3968 | u32 nbytes; | |
3969 | ||
3970 | nbytes = sizeof(*skcomp) * SKD_N_COMPLETION_ENTRY; | |
3971 | nbytes += sizeof(struct fit_comp_error_info) * SKD_N_COMPLETION_ENTRY; | |
3972 | ||
2e44b427 | 3973 | pr_debug("%s:%s:%d comp pci_alloc, total bytes %d entries %d\n", |
3974 | skdev->name, __func__, __LINE__, | |
3975 | nbytes, SKD_N_COMPLETION_ENTRY); | |
e67f86b3 | 3976 | |
a5bbf616 JP |
3977 | skcomp = pci_zalloc_consistent(skdev->pdev, nbytes, |
3978 | &skdev->cq_dma_address); | |
e67f86b3 AB |
3979 | |
3980 | if (skcomp == NULL) { | |
3981 | rc = -ENOMEM; | |
3982 | goto err_out; | |
3983 | } | |
3984 | ||
e67f86b3 AB |
3985 | skdev->skcomp_table = skcomp; |
3986 | skdev->skerr_table = (struct fit_comp_error_info *)((char *)skcomp + | |
3987 | sizeof(*skcomp) * | |
3988 | SKD_N_COMPLETION_ENTRY); | |
3989 | ||
3990 | err_out: | |
3991 | return rc; | |
3992 | } | |
3993 | ||
3994 | static int skd_cons_skmsg(struct skd_device *skdev) | |
3995 | { | |
3996 | int rc = 0; | |
3997 | u32 i; | |
3998 | ||
2e44b427 | 3999 | pr_debug("%s:%s:%d skmsg_table kzalloc, struct %lu, count %u total %lu\n", |
4000 | skdev->name, __func__, __LINE__, | |
4001 | sizeof(struct skd_fitmsg_context), | |
4002 | skdev->num_fitmsg_context, | |
4003 | sizeof(struct skd_fitmsg_context) * skdev->num_fitmsg_context); | |
e67f86b3 AB |
4004 | |
4005 | skdev->skmsg_table = kzalloc(sizeof(struct skd_fitmsg_context) | |
4006 | *skdev->num_fitmsg_context, GFP_KERNEL); | |
4007 | if (skdev->skmsg_table == NULL) { | |
4008 | rc = -ENOMEM; | |
4009 | goto err_out; | |
4010 | } | |
4011 | ||
4012 | for (i = 0; i < skdev->num_fitmsg_context; i++) { | |
4013 | struct skd_fitmsg_context *skmsg; | |
4014 | ||
4015 | skmsg = &skdev->skmsg_table[i]; | |
4016 | ||
4017 | skmsg->id = i + SKD_ID_FIT_MSG; | |
4018 | ||
4019 | skmsg->state = SKD_MSG_STATE_IDLE; | |
4020 | skmsg->msg_buf = pci_alloc_consistent(skdev->pdev, | |
4021 | SKD_N_FITMSG_BYTES + 64, | |
4022 | &skmsg->mb_dma_address); | |
4023 | ||
4024 | if (skmsg->msg_buf == NULL) { | |
4025 | rc = -ENOMEM; | |
4026 | goto err_out; | |
4027 | } | |
4028 | ||
4029 | skmsg->offset = (u32)((u64)skmsg->msg_buf & | |
4030 | (~FIT_QCMD_BASE_ADDRESS_MASK)); | |
4031 | skmsg->msg_buf += ~FIT_QCMD_BASE_ADDRESS_MASK; | |
4032 | skmsg->msg_buf = (u8 *)((u64)skmsg->msg_buf & | |
4033 | FIT_QCMD_BASE_ADDRESS_MASK); | |
4034 | skmsg->mb_dma_address += ~FIT_QCMD_BASE_ADDRESS_MASK; | |
4035 | skmsg->mb_dma_address &= FIT_QCMD_BASE_ADDRESS_MASK; | |
4036 | memset(skmsg->msg_buf, 0, SKD_N_FITMSG_BYTES); | |
4037 | ||
4038 | skmsg->next = &skmsg[1]; | |
4039 | } | |
4040 | ||
4041 | /* Free list is in order starting with the 0th entry. */ | |
4042 | skdev->skmsg_table[i - 1].next = NULL; | |
4043 | skdev->skmsg_free_list = skdev->skmsg_table; | |
4044 | ||
4045 | err_out: | |
4046 | return rc; | |
4047 | } | |
4048 | ||
542d7b00 BZ |
4049 | static struct fit_sg_descriptor *skd_cons_sg_list(struct skd_device *skdev, |
4050 | u32 n_sg, | |
4051 | dma_addr_t *ret_dma_addr) | |
4052 | { | |
4053 | struct fit_sg_descriptor *sg_list; | |
4054 | u32 nbytes; | |
4055 | ||
4056 | nbytes = sizeof(*sg_list) * n_sg; | |
4057 | ||
4058 | sg_list = pci_alloc_consistent(skdev->pdev, nbytes, ret_dma_addr); | |
4059 | ||
4060 | if (sg_list != NULL) { | |
4061 | uint64_t dma_address = *ret_dma_addr; | |
4062 | u32 i; | |
4063 | ||
4064 | memset(sg_list, 0, nbytes); | |
4065 | ||
4066 | for (i = 0; i < n_sg - 1; i++) { | |
4067 | uint64_t ndp_off; | |
4068 | ndp_off = (i + 1) * sizeof(struct fit_sg_descriptor); | |
4069 | ||
4070 | sg_list[i].next_desc_ptr = dma_address + ndp_off; | |
4071 | } | |
4072 | sg_list[i].next_desc_ptr = 0LL; | |
4073 | } | |
4074 | ||
4075 | return sg_list; | |
4076 | } | |
4077 | ||
e67f86b3 AB |
4078 | static int skd_cons_skreq(struct skd_device *skdev) |
4079 | { | |
4080 | int rc = 0; | |
4081 | u32 i; | |
4082 | ||
2e44b427 | 4083 | pr_debug("%s:%s:%d skreq_table kzalloc, struct %lu, count %u total %lu\n", |
4084 | skdev->name, __func__, __LINE__, | |
4085 | sizeof(struct skd_request_context), | |
4086 | skdev->num_req_context, | |
4087 | sizeof(struct skd_request_context) * skdev->num_req_context); | |
e67f86b3 AB |
4088 | |
4089 | skdev->skreq_table = kzalloc(sizeof(struct skd_request_context) | |
4090 | * skdev->num_req_context, GFP_KERNEL); | |
4091 | if (skdev->skreq_table == NULL) { | |
4092 | rc = -ENOMEM; | |
4093 | goto err_out; | |
4094 | } | |
4095 | ||
2e44b427 | 4096 | pr_debug("%s:%s:%d alloc sg_table sg_per_req %u scatlist %lu total %lu\n", |
4097 | skdev->name, __func__, __LINE__, | |
4098 | skdev->sgs_per_request, sizeof(struct scatterlist), | |
4099 | skdev->sgs_per_request * sizeof(struct scatterlist)); | |
e67f86b3 AB |
4100 | |
4101 | for (i = 0; i < skdev->num_req_context; i++) { | |
4102 | struct skd_request_context *skreq; | |
4103 | ||
4104 | skreq = &skdev->skreq_table[i]; | |
4105 | ||
4106 | skreq->id = i + SKD_ID_RW_REQUEST; | |
4107 | skreq->state = SKD_REQ_STATE_IDLE; | |
4108 | ||
4109 | skreq->sg = kzalloc(sizeof(struct scatterlist) * | |
4110 | skdev->sgs_per_request, GFP_KERNEL); | |
4111 | if (skreq->sg == NULL) { | |
4112 | rc = -ENOMEM; | |
4113 | goto err_out; | |
4114 | } | |
4115 | sg_init_table(skreq->sg, skdev->sgs_per_request); | |
4116 | ||
4117 | skreq->sksg_list = skd_cons_sg_list(skdev, | |
4118 | skdev->sgs_per_request, | |
4119 | &skreq->sksg_dma_address); | |
4120 | ||
4121 | if (skreq->sksg_list == NULL) { | |
4122 | rc = -ENOMEM; | |
4123 | goto err_out; | |
4124 | } | |
4125 | ||
4126 | skreq->next = &skreq[1]; | |
4127 | } | |
4128 | ||
4129 | /* Free list is in order starting with the 0th entry. */ | |
4130 | skdev->skreq_table[i - 1].next = NULL; | |
4131 | skdev->skreq_free_list = skdev->skreq_table; | |
4132 | ||
4133 | err_out: | |
4134 | return rc; | |
4135 | } | |
4136 | ||
4137 | static int skd_cons_skspcl(struct skd_device *skdev) | |
4138 | { | |
4139 | int rc = 0; | |
4140 | u32 i, nbytes; | |
4141 | ||
2e44b427 | 4142 | pr_debug("%s:%s:%d skspcl_table kzalloc, struct %lu, count %u total %lu\n", |
4143 | skdev->name, __func__, __LINE__, | |
4144 | sizeof(struct skd_special_context), | |
4145 | skdev->n_special, | |
4146 | sizeof(struct skd_special_context) * skdev->n_special); | |
e67f86b3 AB |
4147 | |
4148 | skdev->skspcl_table = kzalloc(sizeof(struct skd_special_context) | |
4149 | * skdev->n_special, GFP_KERNEL); | |
4150 | if (skdev->skspcl_table == NULL) { | |
4151 | rc = -ENOMEM; | |
4152 | goto err_out; | |
4153 | } | |
4154 | ||
4155 | for (i = 0; i < skdev->n_special; i++) { | |
4156 | struct skd_special_context *skspcl; | |
4157 | ||
4158 | skspcl = &skdev->skspcl_table[i]; | |
4159 | ||
4160 | skspcl->req.id = i + SKD_ID_SPECIAL_REQUEST; | |
4161 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
4162 | ||
4163 | skspcl->req.next = &skspcl[1].req; | |
4164 | ||
4165 | nbytes = SKD_N_SPECIAL_FITMSG_BYTES; | |
4166 | ||
a5bbf616 JP |
4167 | skspcl->msg_buf = |
4168 | pci_zalloc_consistent(skdev->pdev, nbytes, | |
4169 | &skspcl->mb_dma_address); | |
e67f86b3 AB |
4170 | if (skspcl->msg_buf == NULL) { |
4171 | rc = -ENOMEM; | |
4172 | goto err_out; | |
4173 | } | |
4174 | ||
e67f86b3 AB |
4175 | skspcl->req.sg = kzalloc(sizeof(struct scatterlist) * |
4176 | SKD_N_SG_PER_SPECIAL, GFP_KERNEL); | |
4177 | if (skspcl->req.sg == NULL) { | |
4178 | rc = -ENOMEM; | |
4179 | goto err_out; | |
4180 | } | |
4181 | ||
4182 | skspcl->req.sksg_list = skd_cons_sg_list(skdev, | |
4183 | SKD_N_SG_PER_SPECIAL, | |
4184 | &skspcl->req. | |
4185 | sksg_dma_address); | |
4186 | if (skspcl->req.sksg_list == NULL) { | |
4187 | rc = -ENOMEM; | |
4188 | goto err_out; | |
4189 | } | |
4190 | } | |
4191 | ||
4192 | /* Free list is in order starting with the 0th entry. */ | |
4193 | skdev->skspcl_table[i - 1].req.next = NULL; | |
4194 | skdev->skspcl_free_list = skdev->skspcl_table; | |
4195 | ||
4196 | return rc; | |
4197 | ||
4198 | err_out: | |
4199 | return rc; | |
4200 | } | |
4201 | ||
4202 | static int skd_cons_sksb(struct skd_device *skdev) | |
4203 | { | |
4204 | int rc = 0; | |
4205 | struct skd_special_context *skspcl; | |
4206 | u32 nbytes; | |
4207 | ||
4208 | skspcl = &skdev->internal_skspcl; | |
4209 | ||
4210 | skspcl->req.id = 0 + SKD_ID_INTERNAL; | |
4211 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
4212 | ||
4213 | nbytes = SKD_N_INTERNAL_BYTES; | |
4214 | ||
a5bbf616 JP |
4215 | skspcl->data_buf = pci_zalloc_consistent(skdev->pdev, nbytes, |
4216 | &skspcl->db_dma_address); | |
e67f86b3 AB |
4217 | if (skspcl->data_buf == NULL) { |
4218 | rc = -ENOMEM; | |
4219 | goto err_out; | |
4220 | } | |
4221 | ||
e67f86b3 | 4222 | nbytes = SKD_N_SPECIAL_FITMSG_BYTES; |
a5bbf616 JP |
4223 | skspcl->msg_buf = pci_zalloc_consistent(skdev->pdev, nbytes, |
4224 | &skspcl->mb_dma_address); | |
e67f86b3 AB |
4225 | if (skspcl->msg_buf == NULL) { |
4226 | rc = -ENOMEM; | |
4227 | goto err_out; | |
4228 | } | |
4229 | ||
e67f86b3 AB |
4230 | skspcl->req.sksg_list = skd_cons_sg_list(skdev, 1, |
4231 | &skspcl->req.sksg_dma_address); | |
4232 | if (skspcl->req.sksg_list == NULL) { | |
4233 | rc = -ENOMEM; | |
4234 | goto err_out; | |
4235 | } | |
4236 | ||
4237 | if (!skd_format_internal_skspcl(skdev)) { | |
4238 | rc = -EINVAL; | |
4239 | goto err_out; | |
4240 | } | |
4241 | ||
4242 | err_out: | |
4243 | return rc; | |
4244 | } | |
4245 | ||
e67f86b3 AB |
4246 | static int skd_cons_disk(struct skd_device *skdev) |
4247 | { | |
4248 | int rc = 0; | |
4249 | struct gendisk *disk; | |
4250 | struct request_queue *q; | |
4251 | unsigned long flags; | |
4252 | ||
4253 | disk = alloc_disk(SKD_MINORS_PER_DEVICE); | |
4254 | if (!disk) { | |
4255 | rc = -ENOMEM; | |
4256 | goto err_out; | |
4257 | } | |
4258 | ||
4259 | skdev->disk = disk; | |
4260 | sprintf(disk->disk_name, DRV_NAME "%u", skdev->devno); | |
4261 | ||
4262 | disk->major = skdev->major; | |
4263 | disk->first_minor = skdev->devno * SKD_MINORS_PER_DEVICE; | |
4264 | disk->fops = &skd_blockdev_ops; | |
4265 | disk->private_data = skdev; | |
4266 | ||
fcd37eb3 | 4267 | q = blk_init_queue(skd_request_fn, &skdev->lock); |
e67f86b3 AB |
4268 | if (!q) { |
4269 | rc = -ENOMEM; | |
4270 | goto err_out; | |
4271 | } | |
4272 | ||
4273 | skdev->queue = q; | |
4274 | disk->queue = q; | |
4275 | q->queuedata = skdev; | |
4276 | ||
6975f732 | 4277 | blk_queue_write_cache(q, true, true); |
e67f86b3 AB |
4278 | blk_queue_max_segments(q, skdev->sgs_per_request); |
4279 | blk_queue_max_hw_sectors(q, SKD_N_MAX_SECTORS); | |
4280 | ||
4281 | /* set sysfs ptimal_io_size to 8K */ | |
4282 | blk_queue_io_opt(q, 8192); | |
4283 | ||
e67f86b3 | 4284 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); |
b277da0a | 4285 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q); |
e67f86b3 AB |
4286 | |
4287 | spin_lock_irqsave(&skdev->lock, flags); | |
2e44b427 | 4288 | pr_debug("%s:%s:%d stopping %s queue\n", |
4289 | skdev->name, __func__, __LINE__, skdev->name); | |
6a5ec65b | 4290 | blk_stop_queue(skdev->queue); |
e67f86b3 AB |
4291 | spin_unlock_irqrestore(&skdev->lock, flags); |
4292 | ||
4293 | err_out: | |
4294 | return rc; | |
4295 | } | |
4296 | ||
542d7b00 BZ |
4297 | #define SKD_N_DEV_TABLE 16u |
4298 | static u32 skd_next_devno; | |
e67f86b3 | 4299 | |
542d7b00 | 4300 | static struct skd_device *skd_construct(struct pci_dev *pdev) |
e67f86b3 | 4301 | { |
542d7b00 BZ |
4302 | struct skd_device *skdev; |
4303 | int blk_major = skd_major; | |
4304 | int rc; | |
e67f86b3 | 4305 | |
542d7b00 | 4306 | skdev = kzalloc(sizeof(*skdev), GFP_KERNEL); |
e67f86b3 | 4307 | |
542d7b00 BZ |
4308 | if (!skdev) { |
4309 | pr_err(PFX "(%s): memory alloc failure\n", | |
4310 | pci_name(pdev)); | |
4311 | return NULL; | |
4312 | } | |
e67f86b3 | 4313 | |
542d7b00 BZ |
4314 | skdev->state = SKD_DRVR_STATE_LOAD; |
4315 | skdev->pdev = pdev; | |
4316 | skdev->devno = skd_next_devno++; | |
4317 | skdev->major = blk_major; | |
542d7b00 BZ |
4318 | sprintf(skdev->name, DRV_NAME "%d", skdev->devno); |
4319 | skdev->dev_max_queue_depth = 0; | |
e67f86b3 | 4320 | |
542d7b00 BZ |
4321 | skdev->num_req_context = skd_max_queue_depth; |
4322 | skdev->num_fitmsg_context = skd_max_queue_depth; | |
4323 | skdev->n_special = skd_max_pass_thru; | |
4324 | skdev->cur_max_queue_depth = 1; | |
4325 | skdev->queue_low_water_mark = 1; | |
4326 | skdev->proto_ver = 99; | |
4327 | skdev->sgs_per_request = skd_sgs_per_request; | |
4328 | skdev->dbg_level = skd_dbg_level; | |
e67f86b3 | 4329 | |
542d7b00 | 4330 | atomic_set(&skdev->device_count, 0); |
e67f86b3 | 4331 | |
542d7b00 BZ |
4332 | spin_lock_init(&skdev->lock); |
4333 | ||
4334 | INIT_WORK(&skdev->completion_worker, skd_completion_worker); | |
e67f86b3 | 4335 | |
2e44b427 | 4336 | pr_debug("%s:%s:%d skcomp\n", skdev->name, __func__, __LINE__); |
542d7b00 BZ |
4337 | rc = skd_cons_skcomp(skdev); |
4338 | if (rc < 0) | |
4339 | goto err_out; | |
e67f86b3 | 4340 | |
542d7b00 BZ |
4341 | pr_debug("%s:%s:%d skmsg\n", skdev->name, __func__, __LINE__); |
4342 | rc = skd_cons_skmsg(skdev); | |
4343 | if (rc < 0) | |
4344 | goto err_out; | |
4345 | ||
4346 | pr_debug("%s:%s:%d skreq\n", skdev->name, __func__, __LINE__); | |
4347 | rc = skd_cons_skreq(skdev); | |
4348 | if (rc < 0) | |
4349 | goto err_out; | |
4350 | ||
4351 | pr_debug("%s:%s:%d skspcl\n", skdev->name, __func__, __LINE__); | |
4352 | rc = skd_cons_skspcl(skdev); | |
4353 | if (rc < 0) | |
4354 | goto err_out; | |
4355 | ||
4356 | pr_debug("%s:%s:%d sksb\n", skdev->name, __func__, __LINE__); | |
4357 | rc = skd_cons_sksb(skdev); | |
4358 | if (rc < 0) | |
4359 | goto err_out; | |
4360 | ||
4361 | pr_debug("%s:%s:%d disk\n", skdev->name, __func__, __LINE__); | |
4362 | rc = skd_cons_disk(skdev); | |
4363 | if (rc < 0) | |
4364 | goto err_out; | |
4365 | ||
4366 | pr_debug("%s:%s:%d VICTORY\n", skdev->name, __func__, __LINE__); | |
4367 | return skdev; | |
4368 | ||
4369 | err_out: | |
4370 | pr_debug("%s:%s:%d construct failed\n", | |
4371 | skdev->name, __func__, __LINE__); | |
4372 | skd_destruct(skdev); | |
4373 | return NULL; | |
e67f86b3 AB |
4374 | } |
4375 | ||
542d7b00 BZ |
4376 | /* |
4377 | ***************************************************************************** | |
4378 | * DESTRUCT (FREE) | |
4379 | ***************************************************************************** | |
4380 | */ | |
4381 | ||
e67f86b3 AB |
4382 | static void skd_free_skcomp(struct skd_device *skdev) |
4383 | { | |
4384 | if (skdev->skcomp_table != NULL) { | |
4385 | u32 nbytes; | |
4386 | ||
4387 | nbytes = sizeof(skdev->skcomp_table[0]) * | |
4388 | SKD_N_COMPLETION_ENTRY; | |
4389 | pci_free_consistent(skdev->pdev, nbytes, | |
4390 | skdev->skcomp_table, skdev->cq_dma_address); | |
4391 | } | |
4392 | ||
4393 | skdev->skcomp_table = NULL; | |
4394 | skdev->cq_dma_address = 0; | |
4395 | } | |
4396 | ||
4397 | static void skd_free_skmsg(struct skd_device *skdev) | |
4398 | { | |
4399 | u32 i; | |
4400 | ||
4401 | if (skdev->skmsg_table == NULL) | |
4402 | return; | |
4403 | ||
4404 | for (i = 0; i < skdev->num_fitmsg_context; i++) { | |
4405 | struct skd_fitmsg_context *skmsg; | |
4406 | ||
4407 | skmsg = &skdev->skmsg_table[i]; | |
4408 | ||
4409 | if (skmsg->msg_buf != NULL) { | |
4410 | skmsg->msg_buf += skmsg->offset; | |
4411 | skmsg->mb_dma_address += skmsg->offset; | |
4412 | pci_free_consistent(skdev->pdev, SKD_N_FITMSG_BYTES, | |
4413 | skmsg->msg_buf, | |
4414 | skmsg->mb_dma_address); | |
4415 | } | |
4416 | skmsg->msg_buf = NULL; | |
4417 | skmsg->mb_dma_address = 0; | |
4418 | } | |
4419 | ||
4420 | kfree(skdev->skmsg_table); | |
4421 | skdev->skmsg_table = NULL; | |
4422 | } | |
4423 | ||
542d7b00 BZ |
4424 | static void skd_free_sg_list(struct skd_device *skdev, |
4425 | struct fit_sg_descriptor *sg_list, | |
4426 | u32 n_sg, dma_addr_t dma_addr) | |
4427 | { | |
4428 | if (sg_list != NULL) { | |
4429 | u32 nbytes; | |
4430 | ||
4431 | nbytes = sizeof(*sg_list) * n_sg; | |
4432 | ||
4433 | pci_free_consistent(skdev->pdev, nbytes, sg_list, dma_addr); | |
4434 | } | |
4435 | } | |
4436 | ||
e67f86b3 AB |
4437 | static void skd_free_skreq(struct skd_device *skdev) |
4438 | { | |
4439 | u32 i; | |
4440 | ||
4441 | if (skdev->skreq_table == NULL) | |
4442 | return; | |
4443 | ||
4444 | for (i = 0; i < skdev->num_req_context; i++) { | |
4445 | struct skd_request_context *skreq; | |
4446 | ||
4447 | skreq = &skdev->skreq_table[i]; | |
4448 | ||
4449 | skd_free_sg_list(skdev, skreq->sksg_list, | |
4450 | skdev->sgs_per_request, | |
4451 | skreq->sksg_dma_address); | |
4452 | ||
4453 | skreq->sksg_list = NULL; | |
4454 | skreq->sksg_dma_address = 0; | |
4455 | ||
4456 | kfree(skreq->sg); | |
4457 | } | |
4458 | ||
4459 | kfree(skdev->skreq_table); | |
4460 | skdev->skreq_table = NULL; | |
4461 | } | |
4462 | ||
4463 | static void skd_free_skspcl(struct skd_device *skdev) | |
4464 | { | |
4465 | u32 i; | |
4466 | u32 nbytes; | |
4467 | ||
4468 | if (skdev->skspcl_table == NULL) | |
4469 | return; | |
4470 | ||
4471 | for (i = 0; i < skdev->n_special; i++) { | |
4472 | struct skd_special_context *skspcl; | |
4473 | ||
4474 | skspcl = &skdev->skspcl_table[i]; | |
4475 | ||
4476 | if (skspcl->msg_buf != NULL) { | |
4477 | nbytes = SKD_N_SPECIAL_FITMSG_BYTES; | |
4478 | pci_free_consistent(skdev->pdev, nbytes, | |
4479 | skspcl->msg_buf, | |
4480 | skspcl->mb_dma_address); | |
4481 | } | |
4482 | ||
4483 | skspcl->msg_buf = NULL; | |
4484 | skspcl->mb_dma_address = 0; | |
4485 | ||
4486 | skd_free_sg_list(skdev, skspcl->req.sksg_list, | |
4487 | SKD_N_SG_PER_SPECIAL, | |
4488 | skspcl->req.sksg_dma_address); | |
4489 | ||
4490 | skspcl->req.sksg_list = NULL; | |
4491 | skspcl->req.sksg_dma_address = 0; | |
4492 | ||
4493 | kfree(skspcl->req.sg); | |
4494 | } | |
4495 | ||
4496 | kfree(skdev->skspcl_table); | |
4497 | skdev->skspcl_table = NULL; | |
4498 | } | |
4499 | ||
4500 | static void skd_free_sksb(struct skd_device *skdev) | |
4501 | { | |
4502 | struct skd_special_context *skspcl; | |
4503 | u32 nbytes; | |
4504 | ||
4505 | skspcl = &skdev->internal_skspcl; | |
4506 | ||
4507 | if (skspcl->data_buf != NULL) { | |
4508 | nbytes = SKD_N_INTERNAL_BYTES; | |
4509 | ||
4510 | pci_free_consistent(skdev->pdev, nbytes, | |
4511 | skspcl->data_buf, skspcl->db_dma_address); | |
4512 | } | |
4513 | ||
4514 | skspcl->data_buf = NULL; | |
4515 | skspcl->db_dma_address = 0; | |
4516 | ||
4517 | if (skspcl->msg_buf != NULL) { | |
4518 | nbytes = SKD_N_SPECIAL_FITMSG_BYTES; | |
4519 | pci_free_consistent(skdev->pdev, nbytes, | |
4520 | skspcl->msg_buf, skspcl->mb_dma_address); | |
4521 | } | |
4522 | ||
4523 | skspcl->msg_buf = NULL; | |
4524 | skspcl->mb_dma_address = 0; | |
4525 | ||
4526 | skd_free_sg_list(skdev, skspcl->req.sksg_list, 1, | |
4527 | skspcl->req.sksg_dma_address); | |
4528 | ||
4529 | skspcl->req.sksg_list = NULL; | |
4530 | skspcl->req.sksg_dma_address = 0; | |
4531 | } | |
4532 | ||
e67f86b3 AB |
4533 | static void skd_free_disk(struct skd_device *skdev) |
4534 | { | |
4535 | struct gendisk *disk = skdev->disk; | |
4536 | ||
4537 | if (disk != NULL) { | |
4538 | struct request_queue *q = disk->queue; | |
4539 | ||
4540 | if (disk->flags & GENHD_FL_UP) | |
4541 | del_gendisk(disk); | |
4542 | if (q) | |
4543 | blk_cleanup_queue(q); | |
4544 | put_disk(disk); | |
4545 | } | |
4546 | skdev->disk = NULL; | |
4547 | } | |
4548 | ||
542d7b00 BZ |
4549 | static void skd_destruct(struct skd_device *skdev) |
4550 | { | |
4551 | if (skdev == NULL) | |
4552 | return; | |
4553 | ||
4554 | ||
4555 | pr_debug("%s:%s:%d disk\n", skdev->name, __func__, __LINE__); | |
4556 | skd_free_disk(skdev); | |
4557 | ||
4558 | pr_debug("%s:%s:%d sksb\n", skdev->name, __func__, __LINE__); | |
4559 | skd_free_sksb(skdev); | |
4560 | ||
4561 | pr_debug("%s:%s:%d skspcl\n", skdev->name, __func__, __LINE__); | |
4562 | skd_free_skspcl(skdev); | |
4563 | ||
4564 | pr_debug("%s:%s:%d skreq\n", skdev->name, __func__, __LINE__); | |
4565 | skd_free_skreq(skdev); | |
4566 | ||
4567 | pr_debug("%s:%s:%d skmsg\n", skdev->name, __func__, __LINE__); | |
4568 | skd_free_skmsg(skdev); | |
e67f86b3 | 4569 | |
542d7b00 BZ |
4570 | pr_debug("%s:%s:%d skcomp\n", skdev->name, __func__, __LINE__); |
4571 | skd_free_skcomp(skdev); | |
4572 | ||
4573 | pr_debug("%s:%s:%d skdev\n", skdev->name, __func__, __LINE__); | |
4574 | kfree(skdev); | |
4575 | } | |
e67f86b3 AB |
4576 | |
4577 | /* | |
4578 | ***************************************************************************** | |
4579 | * BLOCK DEVICE (BDEV) GLUE | |
4580 | ***************************************************************************** | |
4581 | */ | |
4582 | ||
4583 | static int skd_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
4584 | { | |
4585 | struct skd_device *skdev; | |
4586 | u64 capacity; | |
4587 | ||
4588 | skdev = bdev->bd_disk->private_data; | |
4589 | ||
2e44b427 | 4590 | pr_debug("%s:%s:%d %s: CMD[%s] getgeo device\n", |
4591 | skdev->name, __func__, __LINE__, | |
4592 | bdev->bd_disk->disk_name, current->comm); | |
e67f86b3 AB |
4593 | |
4594 | if (skdev->read_cap_is_valid) { | |
4595 | capacity = get_capacity(skdev->disk); | |
4596 | geo->heads = 64; | |
4597 | geo->sectors = 255; | |
4598 | geo->cylinders = (capacity) / (255 * 64); | |
4599 | ||
4600 | return 0; | |
4601 | } | |
4602 | return -EIO; | |
4603 | } | |
4604 | ||
0d52c756 | 4605 | static int skd_bdev_attach(struct device *parent, struct skd_device *skdev) |
e67f86b3 | 4606 | { |
2e44b427 | 4607 | pr_debug("%s:%s:%d add_disk\n", skdev->name, __func__, __LINE__); |
0d52c756 | 4608 | device_add_disk(parent, skdev->disk); |
e67f86b3 AB |
4609 | return 0; |
4610 | } | |
4611 | ||
4612 | static const struct block_device_operations skd_blockdev_ops = { | |
4613 | .owner = THIS_MODULE, | |
4614 | .ioctl = skd_bdev_ioctl, | |
4615 | .getgeo = skd_bdev_getgeo, | |
4616 | }; | |
4617 | ||
4618 | ||
4619 | /* | |
4620 | ***************************************************************************** | |
4621 | * PCIe DRIVER GLUE | |
4622 | ***************************************************************************** | |
4623 | */ | |
4624 | ||
9baa3c34 | 4625 | static const struct pci_device_id skd_pci_tbl[] = { |
e67f86b3 AB |
4626 | { PCI_VENDOR_ID_STEC, PCI_DEVICE_ID_S1120, |
4627 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, | |
4628 | { 0 } /* terminate list */ | |
4629 | }; | |
4630 | ||
4631 | MODULE_DEVICE_TABLE(pci, skd_pci_tbl); | |
4632 | ||
4633 | static char *skd_pci_info(struct skd_device *skdev, char *str) | |
4634 | { | |
4635 | int pcie_reg; | |
4636 | ||
4637 | strcpy(str, "PCIe ("); | |
4638 | pcie_reg = pci_find_capability(skdev->pdev, PCI_CAP_ID_EXP); | |
4639 | ||
4640 | if (pcie_reg) { | |
4641 | ||
4642 | char lwstr[6]; | |
4643 | uint16_t pcie_lstat, lspeed, lwidth; | |
4644 | ||
4645 | pcie_reg += 0x12; | |
4646 | pci_read_config_word(skdev->pdev, pcie_reg, &pcie_lstat); | |
4647 | lspeed = pcie_lstat & (0xF); | |
4648 | lwidth = (pcie_lstat & 0x3F0) >> 4; | |
4649 | ||
4650 | if (lspeed == 1) | |
4651 | strcat(str, "2.5GT/s "); | |
4652 | else if (lspeed == 2) | |
4653 | strcat(str, "5.0GT/s "); | |
4654 | else | |
4655 | strcat(str, "<unknown> "); | |
4656 | snprintf(lwstr, sizeof(lwstr), "%dX)", lwidth); | |
4657 | strcat(str, lwstr); | |
4658 | } | |
4659 | return str; | |
4660 | } | |
4661 | ||
4662 | static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
4663 | { | |
4664 | int i; | |
4665 | int rc = 0; | |
4666 | char pci_str[32]; | |
4667 | struct skd_device *skdev; | |
4668 | ||
4669 | pr_info("STEC s1120 Driver(%s) version %s-b%s\n", | |
4670 | DRV_NAME, DRV_VERSION, DRV_BUILD_ID); | |
4671 | pr_info("(skd?:??:[%s]): vendor=%04X device=%04x\n", | |
4672 | pci_name(pdev), pdev->vendor, pdev->device); | |
4673 | ||
4674 | rc = pci_enable_device(pdev); | |
4675 | if (rc) | |
4676 | return rc; | |
4677 | rc = pci_request_regions(pdev, DRV_NAME); | |
4678 | if (rc) | |
4679 | goto err_out; | |
4680 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); | |
4681 | if (!rc) { | |
4682 | if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { | |
4683 | ||
4684 | pr_err("(%s): consistent DMA mask error %d\n", | |
4685 | pci_name(pdev), rc); | |
4686 | } | |
4687 | } else { | |
4688 | (rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))); | |
4689 | if (rc) { | |
4690 | ||
4691 | pr_err("(%s): DMA mask error %d\n", | |
4692 | pci_name(pdev), rc); | |
4693 | goto err_out_regions; | |
4694 | } | |
4695 | } | |
4696 | ||
b8df6647 BZ |
4697 | if (!skd_major) { |
4698 | rc = register_blkdev(0, DRV_NAME); | |
4699 | if (rc < 0) | |
4700 | goto err_out_regions; | |
4701 | BUG_ON(!rc); | |
4702 | skd_major = rc; | |
4703 | } | |
4704 | ||
e67f86b3 | 4705 | skdev = skd_construct(pdev); |
1762b57f WY |
4706 | if (skdev == NULL) { |
4707 | rc = -ENOMEM; | |
e67f86b3 | 4708 | goto err_out_regions; |
1762b57f | 4709 | } |
e67f86b3 AB |
4710 | |
4711 | skd_pci_info(skdev, pci_str); | |
4712 | pr_info("(%s): %s 64bit\n", skd_name(skdev), pci_str); | |
4713 | ||
4714 | pci_set_master(pdev); | |
4715 | rc = pci_enable_pcie_error_reporting(pdev); | |
4716 | if (rc) { | |
4717 | pr_err( | |
4718 | "(%s): bad enable of PCIe error reporting rc=%d\n", | |
4719 | skd_name(skdev), rc); | |
4720 | skdev->pcie_error_reporting_is_enabled = 0; | |
4721 | } else | |
4722 | skdev->pcie_error_reporting_is_enabled = 1; | |
4723 | ||
4724 | ||
4725 | pci_set_drvdata(pdev, skdev); | |
ebedd16d | 4726 | |
e67f86b3 AB |
4727 | for (i = 0; i < SKD_MAX_BARS; i++) { |
4728 | skdev->mem_phys[i] = pci_resource_start(pdev, i); | |
4729 | skdev->mem_size[i] = (u32)pci_resource_len(pdev, i); | |
4730 | skdev->mem_map[i] = ioremap(skdev->mem_phys[i], | |
4731 | skdev->mem_size[i]); | |
4732 | if (!skdev->mem_map[i]) { | |
4733 | pr_err("(%s): Unable to map adapter memory!\n", | |
4734 | skd_name(skdev)); | |
4735 | rc = -ENODEV; | |
4736 | goto err_out_iounmap; | |
4737 | } | |
2e44b427 | 4738 | pr_debug("%s:%s:%d mem_map=%p, phyd=%016llx, size=%d\n", |
4739 | skdev->name, __func__, __LINE__, | |
4740 | skdev->mem_map[i], | |
4741 | (uint64_t)skdev->mem_phys[i], skdev->mem_size[i]); | |
e67f86b3 AB |
4742 | } |
4743 | ||
4744 | rc = skd_acquire_irq(skdev); | |
4745 | if (rc) { | |
4746 | pr_err("(%s): interrupt resource error %d\n", | |
4747 | skd_name(skdev), rc); | |
4748 | goto err_out_iounmap; | |
4749 | } | |
4750 | ||
4751 | rc = skd_start_timer(skdev); | |
4752 | if (rc) | |
4753 | goto err_out_timer; | |
4754 | ||
4755 | init_waitqueue_head(&skdev->waitq); | |
4756 | ||
4757 | skd_start_device(skdev); | |
4758 | ||
4759 | rc = wait_event_interruptible_timeout(skdev->waitq, | |
4760 | (skdev->gendisk_on), | |
4761 | (SKD_START_WAIT_SECONDS * HZ)); | |
4762 | if (skdev->gendisk_on > 0) { | |
4763 | /* device came on-line after reset */ | |
0d52c756 | 4764 | skd_bdev_attach(&pdev->dev, skdev); |
e67f86b3 AB |
4765 | rc = 0; |
4766 | } else { | |
4767 | /* we timed out, something is wrong with the device, | |
4768 | don't add the disk structure */ | |
4769 | pr_err( | |
4770 | "(%s): error: waiting for s1120 timed out %d!\n", | |
4771 | skd_name(skdev), rc); | |
4772 | /* in case of no error; we timeout with ENXIO */ | |
4773 | if (!rc) | |
4774 | rc = -ENXIO; | |
4775 | goto err_out_timer; | |
4776 | } | |
4777 | ||
4778 | ||
4779 | #ifdef SKD_VMK_POLL_HANDLER | |
4780 | if (skdev->irq_type == SKD_IRQ_MSIX) { | |
4781 | /* MSIX completion handler is being used for coredump */ | |
4782 | vmklnx_scsi_register_poll_handler(skdev->scsi_host, | |
4783 | skdev->msix_entries[5].vector, | |
4784 | skd_comp_q, skdev); | |
4785 | } else { | |
4786 | vmklnx_scsi_register_poll_handler(skdev->scsi_host, | |
4787 | skdev->pdev->irq, skd_isr, | |
4788 | skdev); | |
4789 | } | |
4790 | #endif /* SKD_VMK_POLL_HANDLER */ | |
4791 | ||
4792 | return rc; | |
4793 | ||
4794 | err_out_timer: | |
4795 | skd_stop_device(skdev); | |
4796 | skd_release_irq(skdev); | |
4797 | ||
4798 | err_out_iounmap: | |
4799 | for (i = 0; i < SKD_MAX_BARS; i++) | |
4800 | if (skdev->mem_map[i]) | |
4801 | iounmap(skdev->mem_map[i]); | |
4802 | ||
4803 | if (skdev->pcie_error_reporting_is_enabled) | |
4804 | pci_disable_pcie_error_reporting(pdev); | |
4805 | ||
4806 | skd_destruct(skdev); | |
4807 | ||
4808 | err_out_regions: | |
4809 | pci_release_regions(pdev); | |
4810 | ||
4811 | err_out: | |
4812 | pci_disable_device(pdev); | |
4813 | pci_set_drvdata(pdev, NULL); | |
4814 | return rc; | |
4815 | } | |
4816 | ||
4817 | static void skd_pci_remove(struct pci_dev *pdev) | |
4818 | { | |
4819 | int i; | |
4820 | struct skd_device *skdev; | |
4821 | ||
4822 | skdev = pci_get_drvdata(pdev); | |
4823 | if (!skdev) { | |
4824 | pr_err("%s: no device data for PCI\n", pci_name(pdev)); | |
4825 | return; | |
4826 | } | |
4827 | skd_stop_device(skdev); | |
4828 | skd_release_irq(skdev); | |
4829 | ||
4830 | for (i = 0; i < SKD_MAX_BARS; i++) | |
4831 | if (skdev->mem_map[i]) | |
4832 | iounmap((u32 *)skdev->mem_map[i]); | |
4833 | ||
4834 | if (skdev->pcie_error_reporting_is_enabled) | |
4835 | pci_disable_pcie_error_reporting(pdev); | |
4836 | ||
4837 | skd_destruct(skdev); | |
4838 | ||
4839 | pci_release_regions(pdev); | |
4840 | pci_disable_device(pdev); | |
4841 | pci_set_drvdata(pdev, NULL); | |
4842 | ||
4843 | return; | |
4844 | } | |
4845 | ||
4846 | static int skd_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
4847 | { | |
4848 | int i; | |
4849 | struct skd_device *skdev; | |
4850 | ||
4851 | skdev = pci_get_drvdata(pdev); | |
4852 | if (!skdev) { | |
4853 | pr_err("%s: no device data for PCI\n", pci_name(pdev)); | |
4854 | return -EIO; | |
4855 | } | |
4856 | ||
4857 | skd_stop_device(skdev); | |
4858 | ||
4859 | skd_release_irq(skdev); | |
4860 | ||
4861 | for (i = 0; i < SKD_MAX_BARS; i++) | |
4862 | if (skdev->mem_map[i]) | |
4863 | iounmap((u32 *)skdev->mem_map[i]); | |
4864 | ||
4865 | if (skdev->pcie_error_reporting_is_enabled) | |
4866 | pci_disable_pcie_error_reporting(pdev); | |
4867 | ||
4868 | pci_release_regions(pdev); | |
4869 | pci_save_state(pdev); | |
4870 | pci_disable_device(pdev); | |
4871 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
4872 | return 0; | |
4873 | } | |
4874 | ||
4875 | static int skd_pci_resume(struct pci_dev *pdev) | |
4876 | { | |
4877 | int i; | |
4878 | int rc = 0; | |
4879 | struct skd_device *skdev; | |
4880 | ||
4881 | skdev = pci_get_drvdata(pdev); | |
4882 | if (!skdev) { | |
4883 | pr_err("%s: no device data for PCI\n", pci_name(pdev)); | |
4884 | return -1; | |
4885 | } | |
4886 | ||
4887 | pci_set_power_state(pdev, PCI_D0); | |
4888 | pci_enable_wake(pdev, PCI_D0, 0); | |
4889 | pci_restore_state(pdev); | |
4890 | ||
4891 | rc = pci_enable_device(pdev); | |
4892 | if (rc) | |
4893 | return rc; | |
4894 | rc = pci_request_regions(pdev, DRV_NAME); | |
4895 | if (rc) | |
4896 | goto err_out; | |
4897 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); | |
4898 | if (!rc) { | |
4899 | if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { | |
4900 | ||
4901 | pr_err("(%s): consistent DMA mask error %d\n", | |
4902 | pci_name(pdev), rc); | |
4903 | } | |
4904 | } else { | |
4905 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); | |
4906 | if (rc) { | |
4907 | ||
4908 | pr_err("(%s): DMA mask error %d\n", | |
4909 | pci_name(pdev), rc); | |
4910 | goto err_out_regions; | |
4911 | } | |
4912 | } | |
4913 | ||
4914 | pci_set_master(pdev); | |
4915 | rc = pci_enable_pcie_error_reporting(pdev); | |
4916 | if (rc) { | |
4917 | pr_err("(%s): bad enable of PCIe error reporting rc=%d\n", | |
4918 | skdev->name, rc); | |
4919 | skdev->pcie_error_reporting_is_enabled = 0; | |
4920 | } else | |
4921 | skdev->pcie_error_reporting_is_enabled = 1; | |
4922 | ||
4923 | for (i = 0; i < SKD_MAX_BARS; i++) { | |
4924 | ||
4925 | skdev->mem_phys[i] = pci_resource_start(pdev, i); | |
4926 | skdev->mem_size[i] = (u32)pci_resource_len(pdev, i); | |
4927 | skdev->mem_map[i] = ioremap(skdev->mem_phys[i], | |
4928 | skdev->mem_size[i]); | |
4929 | if (!skdev->mem_map[i]) { | |
4930 | pr_err("(%s): Unable to map adapter memory!\n", | |
4931 | skd_name(skdev)); | |
4932 | rc = -ENODEV; | |
4933 | goto err_out_iounmap; | |
4934 | } | |
2e44b427 | 4935 | pr_debug("%s:%s:%d mem_map=%p, phyd=%016llx, size=%d\n", |
4936 | skdev->name, __func__, __LINE__, | |
4937 | skdev->mem_map[i], | |
4938 | (uint64_t)skdev->mem_phys[i], skdev->mem_size[i]); | |
e67f86b3 AB |
4939 | } |
4940 | rc = skd_acquire_irq(skdev); | |
4941 | if (rc) { | |
4942 | ||
4943 | pr_err("(%s): interrupt resource error %d\n", | |
4944 | pci_name(pdev), rc); | |
4945 | goto err_out_iounmap; | |
4946 | } | |
4947 | ||
4948 | rc = skd_start_timer(skdev); | |
4949 | if (rc) | |
4950 | goto err_out_timer; | |
4951 | ||
4952 | init_waitqueue_head(&skdev->waitq); | |
4953 | ||
4954 | skd_start_device(skdev); | |
4955 | ||
4956 | return rc; | |
4957 | ||
4958 | err_out_timer: | |
4959 | skd_stop_device(skdev); | |
4960 | skd_release_irq(skdev); | |
4961 | ||
4962 | err_out_iounmap: | |
4963 | for (i = 0; i < SKD_MAX_BARS; i++) | |
4964 | if (skdev->mem_map[i]) | |
4965 | iounmap(skdev->mem_map[i]); | |
4966 | ||
4967 | if (skdev->pcie_error_reporting_is_enabled) | |
4968 | pci_disable_pcie_error_reporting(pdev); | |
4969 | ||
4970 | err_out_regions: | |
4971 | pci_release_regions(pdev); | |
4972 | ||
4973 | err_out: | |
4974 | pci_disable_device(pdev); | |
4975 | return rc; | |
4976 | } | |
4977 | ||
4978 | static void skd_pci_shutdown(struct pci_dev *pdev) | |
4979 | { | |
4980 | struct skd_device *skdev; | |
4981 | ||
4982 | pr_err("skd_pci_shutdown called\n"); | |
4983 | ||
4984 | skdev = pci_get_drvdata(pdev); | |
4985 | if (!skdev) { | |
4986 | pr_err("%s: no device data for PCI\n", pci_name(pdev)); | |
4987 | return; | |
4988 | } | |
4989 | ||
4990 | pr_err("%s: calling stop\n", skd_name(skdev)); | |
4991 | skd_stop_device(skdev); | |
4992 | } | |
4993 | ||
4994 | static struct pci_driver skd_driver = { | |
4995 | .name = DRV_NAME, | |
4996 | .id_table = skd_pci_tbl, | |
4997 | .probe = skd_pci_probe, | |
4998 | .remove = skd_pci_remove, | |
4999 | .suspend = skd_pci_suspend, | |
5000 | .resume = skd_pci_resume, | |
5001 | .shutdown = skd_pci_shutdown, | |
5002 | }; | |
5003 | ||
5004 | /* | |
5005 | ***************************************************************************** | |
5006 | * LOGGING SUPPORT | |
5007 | ***************************************************************************** | |
5008 | */ | |
5009 | ||
5010 | static const char *skd_name(struct skd_device *skdev) | |
5011 | { | |
5012 | memset(skdev->id_str, 0, sizeof(skdev->id_str)); | |
5013 | ||
5014 | if (skdev->inquiry_is_valid) | |
5015 | snprintf(skdev->id_str, sizeof(skdev->id_str), "%s:%s:[%s]", | |
5016 | skdev->name, skdev->inq_serial_num, | |
5017 | pci_name(skdev->pdev)); | |
5018 | else | |
5019 | snprintf(skdev->id_str, sizeof(skdev->id_str), "%s:??:[%s]", | |
5020 | skdev->name, pci_name(skdev->pdev)); | |
5021 | ||
5022 | return skdev->id_str; | |
5023 | } | |
5024 | ||
5025 | const char *skd_drive_state_to_str(int state) | |
5026 | { | |
5027 | switch (state) { | |
5028 | case FIT_SR_DRIVE_OFFLINE: | |
5029 | return "OFFLINE"; | |
5030 | case FIT_SR_DRIVE_INIT: | |
5031 | return "INIT"; | |
5032 | case FIT_SR_DRIVE_ONLINE: | |
5033 | return "ONLINE"; | |
5034 | case FIT_SR_DRIVE_BUSY: | |
5035 | return "BUSY"; | |
5036 | case FIT_SR_DRIVE_FAULT: | |
5037 | return "FAULT"; | |
5038 | case FIT_SR_DRIVE_DEGRADED: | |
5039 | return "DEGRADED"; | |
5040 | case FIT_SR_PCIE_LINK_DOWN: | |
5041 | return "INK_DOWN"; | |
5042 | case FIT_SR_DRIVE_SOFT_RESET: | |
5043 | return "SOFT_RESET"; | |
5044 | case FIT_SR_DRIVE_NEED_FW_DOWNLOAD: | |
5045 | return "NEED_FW"; | |
5046 | case FIT_SR_DRIVE_INIT_FAULT: | |
5047 | return "INIT_FAULT"; | |
5048 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
5049 | return "BUSY_SANITIZE"; | |
5050 | case FIT_SR_DRIVE_BUSY_ERASE: | |
5051 | return "BUSY_ERASE"; | |
5052 | case FIT_SR_DRIVE_FW_BOOTING: | |
5053 | return "FW_BOOTING"; | |
5054 | default: | |
5055 | return "???"; | |
5056 | } | |
5057 | } | |
5058 | ||
5059 | const char *skd_skdev_state_to_str(enum skd_drvr_state state) | |
5060 | { | |
5061 | switch (state) { | |
5062 | case SKD_DRVR_STATE_LOAD: | |
5063 | return "LOAD"; | |
5064 | case SKD_DRVR_STATE_IDLE: | |
5065 | return "IDLE"; | |
5066 | case SKD_DRVR_STATE_BUSY: | |
5067 | return "BUSY"; | |
5068 | case SKD_DRVR_STATE_STARTING: | |
5069 | return "STARTING"; | |
5070 | case SKD_DRVR_STATE_ONLINE: | |
5071 | return "ONLINE"; | |
5072 | case SKD_DRVR_STATE_PAUSING: | |
5073 | return "PAUSING"; | |
5074 | case SKD_DRVR_STATE_PAUSED: | |
5075 | return "PAUSED"; | |
5076 | case SKD_DRVR_STATE_DRAINING_TIMEOUT: | |
5077 | return "DRAINING_TIMEOUT"; | |
5078 | case SKD_DRVR_STATE_RESTARTING: | |
5079 | return "RESTARTING"; | |
5080 | case SKD_DRVR_STATE_RESUMING: | |
5081 | return "RESUMING"; | |
5082 | case SKD_DRVR_STATE_STOPPING: | |
5083 | return "STOPPING"; | |
5084 | case SKD_DRVR_STATE_SYNCING: | |
5085 | return "SYNCING"; | |
5086 | case SKD_DRVR_STATE_FAULT: | |
5087 | return "FAULT"; | |
5088 | case SKD_DRVR_STATE_DISAPPEARED: | |
5089 | return "DISAPPEARED"; | |
5090 | case SKD_DRVR_STATE_BUSY_ERASE: | |
5091 | return "BUSY_ERASE"; | |
5092 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
5093 | return "BUSY_SANITIZE"; | |
5094 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
5095 | return "BUSY_IMMINENT"; | |
5096 | case SKD_DRVR_STATE_WAIT_BOOT: | |
5097 | return "WAIT_BOOT"; | |
5098 | ||
5099 | default: | |
5100 | return "???"; | |
5101 | } | |
5102 | } | |
5103 | ||
a26ba7fa | 5104 | static const char *skd_skmsg_state_to_str(enum skd_fit_msg_state state) |
e67f86b3 AB |
5105 | { |
5106 | switch (state) { | |
5107 | case SKD_MSG_STATE_IDLE: | |
5108 | return "IDLE"; | |
5109 | case SKD_MSG_STATE_BUSY: | |
5110 | return "BUSY"; | |
5111 | default: | |
5112 | return "???"; | |
5113 | } | |
5114 | } | |
5115 | ||
a26ba7fa | 5116 | static const char *skd_skreq_state_to_str(enum skd_req_state state) |
e67f86b3 AB |
5117 | { |
5118 | switch (state) { | |
5119 | case SKD_REQ_STATE_IDLE: | |
5120 | return "IDLE"; | |
5121 | case SKD_REQ_STATE_SETUP: | |
5122 | return "SETUP"; | |
5123 | case SKD_REQ_STATE_BUSY: | |
5124 | return "BUSY"; | |
5125 | case SKD_REQ_STATE_COMPLETED: | |
5126 | return "COMPLETED"; | |
5127 | case SKD_REQ_STATE_TIMEOUT: | |
5128 | return "TIMEOUT"; | |
5129 | case SKD_REQ_STATE_ABORTED: | |
5130 | return "ABORTED"; | |
5131 | default: | |
5132 | return "???"; | |
5133 | } | |
5134 | } | |
5135 | ||
5136 | static void skd_log_skdev(struct skd_device *skdev, const char *event) | |
5137 | { | |
2e44b427 | 5138 | pr_debug("%s:%s:%d (%s) skdev=%p event='%s'\n", |
5139 | skdev->name, __func__, __LINE__, skdev->name, skdev, event); | |
5140 | pr_debug("%s:%s:%d drive_state=%s(%d) driver_state=%s(%d)\n", | |
5141 | skdev->name, __func__, __LINE__, | |
5142 | skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, | |
5143 | skd_skdev_state_to_str(skdev->state), skdev->state); | |
5144 | pr_debug("%s:%s:%d busy=%d limit=%d dev=%d lowat=%d\n", | |
5145 | skdev->name, __func__, __LINE__, | |
5146 | skdev->in_flight, skdev->cur_max_queue_depth, | |
5147 | skdev->dev_max_queue_depth, skdev->queue_low_water_mark); | |
5148 | pr_debug("%s:%s:%d timestamp=0x%x cycle=%d cycle_ix=%d\n", | |
5149 | skdev->name, __func__, __LINE__, | |
5150 | skdev->timeout_stamp, skdev->skcomp_cycle, skdev->skcomp_ix); | |
e67f86b3 AB |
5151 | } |
5152 | ||
5153 | static void skd_log_skmsg(struct skd_device *skdev, | |
5154 | struct skd_fitmsg_context *skmsg, const char *event) | |
5155 | { | |
2e44b427 | 5156 | pr_debug("%s:%s:%d (%s) skmsg=%p event='%s'\n", |
5157 | skdev->name, __func__, __LINE__, skdev->name, skmsg, event); | |
5158 | pr_debug("%s:%s:%d state=%s(%d) id=0x%04x length=%d\n", | |
5159 | skdev->name, __func__, __LINE__, | |
5160 | skd_skmsg_state_to_str(skmsg->state), skmsg->state, | |
5161 | skmsg->id, skmsg->length); | |
e67f86b3 AB |
5162 | } |
5163 | ||
5164 | static void skd_log_skreq(struct skd_device *skdev, | |
5165 | struct skd_request_context *skreq, const char *event) | |
5166 | { | |
2e44b427 | 5167 | pr_debug("%s:%s:%d (%s) skreq=%p event='%s'\n", |
5168 | skdev->name, __func__, __LINE__, skdev->name, skreq, event); | |
5169 | pr_debug("%s:%s:%d state=%s(%d) id=0x%04x fitmsg=0x%04x\n", | |
5170 | skdev->name, __func__, __LINE__, | |
5171 | skd_skreq_state_to_str(skreq->state), skreq->state, | |
5172 | skreq->id, skreq->fitmsg_id); | |
5173 | pr_debug("%s:%s:%d timo=0x%x sg_dir=%d n_sg=%d\n", | |
5174 | skdev->name, __func__, __LINE__, | |
5175 | skreq->timeout_stamp, skreq->sg_data_dir, skreq->n_sg); | |
e67f86b3 | 5176 | |
fcd37eb3 JA |
5177 | if (skreq->req != NULL) { |
5178 | struct request *req = skreq->req; | |
5179 | u32 lba = (u32)blk_rq_pos(req); | |
5180 | u32 count = blk_rq_sectors(req); | |
e67f86b3 | 5181 | |
fcd37eb3 JA |
5182 | pr_debug("%s:%s:%d " |
5183 | "req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", | |
5184 | skdev->name, __func__, __LINE__, | |
5185 | req, lba, lba, count, count, | |
5186 | (int)rq_data_dir(req)); | |
5187 | } else | |
5188 | pr_debug("%s:%s:%d req=NULL\n", | |
5189 | skdev->name, __func__, __LINE__); | |
e67f86b3 AB |
5190 | } |
5191 | ||
5192 | /* | |
5193 | ***************************************************************************** | |
5194 | * MODULE GLUE | |
5195 | ***************************************************************************** | |
5196 | */ | |
5197 | ||
5198 | static int __init skd_init(void) | |
5199 | { | |
e67f86b3 AB |
5200 | pr_info(PFX " v%s-b%s loaded\n", DRV_VERSION, DRV_BUILD_ID); |
5201 | ||
5202 | switch (skd_isr_type) { | |
5203 | case SKD_IRQ_LEGACY: | |
5204 | case SKD_IRQ_MSI: | |
5205 | case SKD_IRQ_MSIX: | |
5206 | break; | |
5207 | default: | |
fbed149a | 5208 | pr_err(PFX "skd_isr_type %d invalid, re-set to %d\n", |
e67f86b3 AB |
5209 | skd_isr_type, SKD_IRQ_DEFAULT); |
5210 | skd_isr_type = SKD_IRQ_DEFAULT; | |
5211 | } | |
5212 | ||
fbed149a BZ |
5213 | if (skd_max_queue_depth < 1 || |
5214 | skd_max_queue_depth > SKD_MAX_QUEUE_DEPTH) { | |
5215 | pr_err(PFX "skd_max_queue_depth %d invalid, re-set to %d\n", | |
e67f86b3 AB |
5216 | skd_max_queue_depth, SKD_MAX_QUEUE_DEPTH_DEFAULT); |
5217 | skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; | |
5218 | } | |
5219 | ||
5220 | if (skd_max_req_per_msg < 1 || skd_max_req_per_msg > 14) { | |
fbed149a | 5221 | pr_err(PFX "skd_max_req_per_msg %d invalid, re-set to %d\n", |
e67f86b3 AB |
5222 | skd_max_req_per_msg, SKD_MAX_REQ_PER_MSG_DEFAULT); |
5223 | skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; | |
5224 | } | |
5225 | ||
5226 | if (skd_sgs_per_request < 1 || skd_sgs_per_request > 4096) { | |
fbed149a | 5227 | pr_err(PFX "skd_sg_per_request %d invalid, re-set to %d\n", |
e67f86b3 AB |
5228 | skd_sgs_per_request, SKD_N_SG_PER_REQ_DEFAULT); |
5229 | skd_sgs_per_request = SKD_N_SG_PER_REQ_DEFAULT; | |
5230 | } | |
5231 | ||
5232 | if (skd_dbg_level < 0 || skd_dbg_level > 2) { | |
fbed149a | 5233 | pr_err(PFX "skd_dbg_level %d invalid, re-set to %d\n", |
e67f86b3 AB |
5234 | skd_dbg_level, 0); |
5235 | skd_dbg_level = 0; | |
5236 | } | |
5237 | ||
5238 | if (skd_isr_comp_limit < 0) { | |
fbed149a | 5239 | pr_err(PFX "skd_isr_comp_limit %d invalid, set to %d\n", |
e67f86b3 AB |
5240 | skd_isr_comp_limit, 0); |
5241 | skd_isr_comp_limit = 0; | |
5242 | } | |
5243 | ||
5244 | if (skd_max_pass_thru < 1 || skd_max_pass_thru > 50) { | |
fbed149a | 5245 | pr_err(PFX "skd_max_pass_thru %d invalid, re-set to %d\n", |
e67f86b3 AB |
5246 | skd_max_pass_thru, SKD_N_SPECIAL_CONTEXT); |
5247 | skd_max_pass_thru = SKD_N_SPECIAL_CONTEXT; | |
5248 | } | |
5249 | ||
b8df6647 | 5250 | return pci_register_driver(&skd_driver); |
e67f86b3 AB |
5251 | } |
5252 | ||
5253 | static void __exit skd_exit(void) | |
5254 | { | |
5255 | pr_info(PFX " v%s-b%s unloading\n", DRV_VERSION, DRV_BUILD_ID); | |
5256 | ||
e67f86b3 | 5257 | pci_unregister_driver(&skd_driver); |
b8df6647 BZ |
5258 | |
5259 | if (skd_major) | |
5260 | unregister_blkdev(skd_major, DRV_NAME); | |
e67f86b3 AB |
5261 | } |
5262 | ||
e67f86b3 AB |
5263 | module_init(skd_init); |
5264 | module_exit(skd_exit); |