Commit | Line | Data |
---|---|---|
bec9e8ac BVA |
1 | /* |
2 | * Driver for sTec s1120 PCIe SSDs. sTec was acquired in 2013 by HGST and HGST | |
3 | * was acquired by Western Digital in 2012. | |
e67f86b3 | 4 | * |
bec9e8ac BVA |
5 | * Copyright 2012 sTec, Inc. |
6 | * Copyright (c) 2017 Western Digital Corporation or its affiliates. | |
7 | * | |
8 | * This file is part of the Linux kernel, and is made available under | |
9 | * the terms of the GNU General Public License version 2. | |
e67f86b3 AB |
10 | */ |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/pci.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/spinlock.h> | |
18 | #include <linux/blkdev.h> | |
f18c17c8 | 19 | #include <linux/blk-mq.h> |
e67f86b3 AB |
20 | #include <linux/sched.h> |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/compiler.h> | |
23 | #include <linux/workqueue.h> | |
e67f86b3 AB |
24 | #include <linux/delay.h> |
25 | #include <linux/time.h> | |
26 | #include <linux/hdreg.h> | |
27 | #include <linux/dma-mapping.h> | |
28 | #include <linux/completion.h> | |
29 | #include <linux/scatterlist.h> | |
30 | #include <linux/version.h> | |
31 | #include <linux/err.h> | |
e67f86b3 | 32 | #include <linux/aer.h> |
e67f86b3 | 33 | #include <linux/wait.h> |
2da7b403 | 34 | #include <linux/stringify.h> |
e67f86b3 | 35 | #include <scsi/scsi.h> |
e67f86b3 AB |
36 | #include <scsi/sg.h> |
37 | #include <linux/io.h> | |
38 | #include <linux/uaccess.h> | |
4ca90b53 | 39 | #include <asm/unaligned.h> |
e67f86b3 AB |
40 | |
41 | #include "skd_s1120.h" | |
42 | ||
43 | static int skd_dbg_level; | |
44 | static int skd_isr_comp_limit = 4; | |
45 | ||
e67f86b3 AB |
46 | #define SKD_ASSERT(expr) \ |
47 | do { \ | |
48 | if (unlikely(!(expr))) { \ | |
49 | pr_err("Assertion failed! %s,%s,%s,line=%d\n", \ | |
50 | # expr, __FILE__, __func__, __LINE__); \ | |
51 | } \ | |
52 | } while (0) | |
53 | ||
e67f86b3 | 54 | #define DRV_NAME "skd" |
e67f86b3 | 55 | #define PFX DRV_NAME ": " |
e67f86b3 | 56 | |
bec9e8ac | 57 | MODULE_LICENSE("GPL"); |
e67f86b3 | 58 | |
bb9f7dd3 | 59 | MODULE_DESCRIPTION("STEC s1120 PCIe SSD block driver"); |
e67f86b3 AB |
60 | |
61 | #define PCI_VENDOR_ID_STEC 0x1B39 | |
62 | #define PCI_DEVICE_ID_S1120 0x0001 | |
63 | ||
64 | #define SKD_FUA_NV (1 << 1) | |
65 | #define SKD_MINORS_PER_DEVICE 16 | |
66 | ||
67 | #define SKD_MAX_QUEUE_DEPTH 200u | |
68 | ||
69 | #define SKD_PAUSE_TIMEOUT (5 * 1000) | |
70 | ||
71 | #define SKD_N_FITMSG_BYTES (512u) | |
2da7b403 | 72 | #define SKD_MAX_REQ_PER_MSG 14 |
e67f86b3 | 73 | |
e67f86b3 AB |
74 | #define SKD_N_SPECIAL_FITMSG_BYTES (128u) |
75 | ||
76 | /* SG elements are 32 bytes, so we can make this 4096 and still be under the | |
77 | * 128KB limit. That allows 4096*4K = 16M xfer size | |
78 | */ | |
79 | #define SKD_N_SG_PER_REQ_DEFAULT 256u | |
e67f86b3 AB |
80 | |
81 | #define SKD_N_COMPLETION_ENTRY 256u | |
82 | #define SKD_N_READ_CAP_BYTES (8u) | |
83 | ||
84 | #define SKD_N_INTERNAL_BYTES (512u) | |
85 | ||
6f7c7675 BVA |
86 | #define SKD_SKCOMP_SIZE \ |
87 | ((sizeof(struct fit_completion_entry_v1) + \ | |
88 | sizeof(struct fit_comp_error_info)) * SKD_N_COMPLETION_ENTRY) | |
89 | ||
e67f86b3 | 90 | /* 5 bits of uniqifier, 0xF800 */ |
e67f86b3 AB |
91 | #define SKD_ID_TABLE_MASK (3u << 8u) |
92 | #define SKD_ID_RW_REQUEST (0u << 8u) | |
93 | #define SKD_ID_INTERNAL (1u << 8u) | |
e67f86b3 AB |
94 | #define SKD_ID_FIT_MSG (3u << 8u) |
95 | #define SKD_ID_SLOT_MASK 0x00FFu | |
96 | #define SKD_ID_SLOT_AND_TABLE_MASK 0x03FFu | |
97 | ||
e67f86b3 AB |
98 | #define SKD_N_MAX_SECTORS 2048u |
99 | ||
100 | #define SKD_MAX_RETRIES 2u | |
101 | ||
102 | #define SKD_TIMER_SECONDS(seconds) (seconds) | |
103 | #define SKD_TIMER_MINUTES(minutes) ((minutes) * (60)) | |
104 | ||
105 | #define INQ_STD_NBYTES 36 | |
e67f86b3 AB |
106 | |
107 | enum skd_drvr_state { | |
108 | SKD_DRVR_STATE_LOAD, | |
109 | SKD_DRVR_STATE_IDLE, | |
110 | SKD_DRVR_STATE_BUSY, | |
111 | SKD_DRVR_STATE_STARTING, | |
112 | SKD_DRVR_STATE_ONLINE, | |
113 | SKD_DRVR_STATE_PAUSING, | |
114 | SKD_DRVR_STATE_PAUSED, | |
e67f86b3 AB |
115 | SKD_DRVR_STATE_RESTARTING, |
116 | SKD_DRVR_STATE_RESUMING, | |
117 | SKD_DRVR_STATE_STOPPING, | |
118 | SKD_DRVR_STATE_FAULT, | |
119 | SKD_DRVR_STATE_DISAPPEARED, | |
120 | SKD_DRVR_STATE_PROTOCOL_MISMATCH, | |
121 | SKD_DRVR_STATE_BUSY_ERASE, | |
122 | SKD_DRVR_STATE_BUSY_SANITIZE, | |
123 | SKD_DRVR_STATE_BUSY_IMMINENT, | |
124 | SKD_DRVR_STATE_WAIT_BOOT, | |
125 | SKD_DRVR_STATE_SYNCING, | |
126 | }; | |
127 | ||
128 | #define SKD_WAIT_BOOT_TIMO SKD_TIMER_SECONDS(90u) | |
129 | #define SKD_STARTING_TIMO SKD_TIMER_SECONDS(8u) | |
130 | #define SKD_RESTARTING_TIMO SKD_TIMER_MINUTES(4u) | |
e67f86b3 AB |
131 | #define SKD_BUSY_TIMO SKD_TIMER_MINUTES(20u) |
132 | #define SKD_STARTED_BUSY_TIMO SKD_TIMER_SECONDS(60u) | |
133 | #define SKD_START_WAIT_SECONDS 90u | |
134 | ||
135 | enum skd_req_state { | |
136 | SKD_REQ_STATE_IDLE, | |
137 | SKD_REQ_STATE_SETUP, | |
138 | SKD_REQ_STATE_BUSY, | |
139 | SKD_REQ_STATE_COMPLETED, | |
140 | SKD_REQ_STATE_TIMEOUT, | |
e67f86b3 AB |
141 | }; |
142 | ||
e67f86b3 AB |
143 | enum skd_check_status_action { |
144 | SKD_CHECK_STATUS_REPORT_GOOD, | |
145 | SKD_CHECK_STATUS_REPORT_SMART_ALERT, | |
146 | SKD_CHECK_STATUS_REQUEUE_REQUEST, | |
147 | SKD_CHECK_STATUS_REPORT_ERROR, | |
148 | SKD_CHECK_STATUS_BUSY_IMMINENT, | |
149 | }; | |
150 | ||
d891fe60 BVA |
151 | struct skd_msg_buf { |
152 | struct fit_msg_hdr fmh; | |
153 | struct skd_scsi_request scsi[SKD_MAX_REQ_PER_MSG]; | |
154 | }; | |
155 | ||
e67f86b3 | 156 | struct skd_fitmsg_context { |
e67f86b3 | 157 | u32 id; |
e67f86b3 AB |
158 | |
159 | u32 length; | |
e67f86b3 | 160 | |
d891fe60 | 161 | struct skd_msg_buf *msg_buf; |
e67f86b3 AB |
162 | dma_addr_t mb_dma_address; |
163 | }; | |
164 | ||
165 | struct skd_request_context { | |
166 | enum skd_req_state state; | |
167 | ||
e67f86b3 AB |
168 | u16 id; |
169 | u32 fitmsg_id; | |
170 | ||
e67f86b3 | 171 | u8 flush_cmd; |
e67f86b3 | 172 | |
b1824eef | 173 | enum dma_data_direction data_dir; |
e67f86b3 AB |
174 | struct scatterlist *sg; |
175 | u32 n_sg; | |
176 | u32 sg_byte_count; | |
177 | ||
178 | struct fit_sg_descriptor *sksg_list; | |
179 | dma_addr_t sksg_dma_address; | |
180 | ||
181 | struct fit_completion_entry_v1 completion; | |
182 | ||
183 | struct fit_comp_error_info err_info; | |
1bee4243 | 184 | int retries; |
e67f86b3 | 185 | |
f2fe4459 | 186 | blk_status_t status; |
e67f86b3 | 187 | }; |
e67f86b3 AB |
188 | |
189 | struct skd_special_context { | |
190 | struct skd_request_context req; | |
191 | ||
e67f86b3 AB |
192 | void *data_buf; |
193 | dma_addr_t db_dma_address; | |
194 | ||
d891fe60 | 195 | struct skd_msg_buf *msg_buf; |
e67f86b3 AB |
196 | dma_addr_t mb_dma_address; |
197 | }; | |
198 | ||
e67f86b3 AB |
199 | typedef enum skd_irq_type { |
200 | SKD_IRQ_LEGACY, | |
201 | SKD_IRQ_MSI, | |
202 | SKD_IRQ_MSIX | |
203 | } skd_irq_type_t; | |
204 | ||
205 | #define SKD_MAX_BARS 2 | |
206 | ||
207 | struct skd_device { | |
85e34112 | 208 | void __iomem *mem_map[SKD_MAX_BARS]; |
e67f86b3 AB |
209 | resource_size_t mem_phys[SKD_MAX_BARS]; |
210 | u32 mem_size[SKD_MAX_BARS]; | |
211 | ||
e67f86b3 AB |
212 | struct skd_msix_entry *msix_entries; |
213 | ||
214 | struct pci_dev *pdev; | |
215 | int pcie_error_reporting_is_enabled; | |
216 | ||
217 | spinlock_t lock; | |
218 | struct gendisk *disk; | |
ca33dd92 | 219 | struct blk_mq_tag_set tag_set; |
e67f86b3 | 220 | struct request_queue *queue; |
91f85da4 | 221 | struct skd_fitmsg_context *skmsg; |
e67f86b3 AB |
222 | struct device *class_dev; |
223 | int gendisk_on; | |
224 | int sync_done; | |
225 | ||
e67f86b3 AB |
226 | u32 devno; |
227 | u32 major; | |
e67f86b3 AB |
228 | char isr_name[30]; |
229 | ||
230 | enum skd_drvr_state state; | |
231 | u32 drive_state; | |
232 | ||
e67f86b3 AB |
233 | u32 cur_max_queue_depth; |
234 | u32 queue_low_water_mark; | |
235 | u32 dev_max_queue_depth; | |
236 | ||
237 | u32 num_fitmsg_context; | |
238 | u32 num_req_context; | |
239 | ||
e67f86b3 AB |
240 | struct skd_fitmsg_context *skmsg_table; |
241 | ||
e67f86b3 AB |
242 | struct skd_special_context internal_skspcl; |
243 | u32 read_cap_blocksize; | |
244 | u32 read_cap_last_lba; | |
245 | int read_cap_is_valid; | |
246 | int inquiry_is_valid; | |
247 | u8 inq_serial_num[13]; /*12 chars plus null term */ | |
e67f86b3 AB |
248 | |
249 | u8 skcomp_cycle; | |
250 | u32 skcomp_ix; | |
a3db102d BVA |
251 | struct kmem_cache *msgbuf_cache; |
252 | struct kmem_cache *sglist_cache; | |
253 | struct kmem_cache *databuf_cache; | |
e67f86b3 AB |
254 | struct fit_completion_entry_v1 *skcomp_table; |
255 | struct fit_comp_error_info *skerr_table; | |
256 | dma_addr_t cq_dma_address; | |
257 | ||
258 | wait_queue_head_t waitq; | |
259 | ||
260 | struct timer_list timer; | |
261 | u32 timer_countdown; | |
262 | u32 timer_substate; | |
263 | ||
e67f86b3 AB |
264 | int sgs_per_request; |
265 | u32 last_mtd; | |
266 | ||
267 | u32 proto_ver; | |
268 | ||
269 | int dbg_level; | |
270 | u32 connect_time_stamp; | |
271 | int connect_retries; | |
272 | #define SKD_MAX_CONNECT_RETRIES 16 | |
273 | u32 drive_jiffies; | |
274 | ||
275 | u32 timo_slot; | |
276 | ||
ca33dd92 | 277 | struct work_struct start_queue; |
38d4a1bb | 278 | struct work_struct completion_worker; |
e67f86b3 AB |
279 | }; |
280 | ||
281 | #define SKD_WRITEL(DEV, VAL, OFF) skd_reg_write32(DEV, VAL, OFF) | |
282 | #define SKD_READL(DEV, OFF) skd_reg_read32(DEV, OFF) | |
283 | #define SKD_WRITEQ(DEV, VAL, OFF) skd_reg_write64(DEV, VAL, OFF) | |
284 | ||
285 | static inline u32 skd_reg_read32(struct skd_device *skdev, u32 offset) | |
286 | { | |
14262a4b | 287 | u32 val = readl(skdev->mem_map[1] + offset); |
e67f86b3 | 288 | |
14262a4b | 289 | if (unlikely(skdev->dbg_level >= 2)) |
f98806d6 | 290 | dev_dbg(&skdev->pdev->dev, "offset %x = %x\n", offset, val); |
14262a4b | 291 | return val; |
e67f86b3 AB |
292 | } |
293 | ||
294 | static inline void skd_reg_write32(struct skd_device *skdev, u32 val, | |
295 | u32 offset) | |
296 | { | |
14262a4b BVA |
297 | writel(val, skdev->mem_map[1] + offset); |
298 | if (unlikely(skdev->dbg_level >= 2)) | |
f98806d6 | 299 | dev_dbg(&skdev->pdev->dev, "offset %x = %x\n", offset, val); |
e67f86b3 AB |
300 | } |
301 | ||
302 | static inline void skd_reg_write64(struct skd_device *skdev, u64 val, | |
303 | u32 offset) | |
304 | { | |
14262a4b BVA |
305 | writeq(val, skdev->mem_map[1] + offset); |
306 | if (unlikely(skdev->dbg_level >= 2)) | |
f98806d6 BVA |
307 | dev_dbg(&skdev->pdev->dev, "offset %x = %016llx\n", offset, |
308 | val); | |
e67f86b3 AB |
309 | } |
310 | ||
311 | ||
744353b6 | 312 | #define SKD_IRQ_DEFAULT SKD_IRQ_MSIX |
e67f86b3 AB |
313 | static int skd_isr_type = SKD_IRQ_DEFAULT; |
314 | ||
315 | module_param(skd_isr_type, int, 0444); | |
316 | MODULE_PARM_DESC(skd_isr_type, "Interrupt type capability." | |
317 | " (0==legacy, 1==MSI, 2==MSI-X, default==1)"); | |
318 | ||
319 | #define SKD_MAX_REQ_PER_MSG_DEFAULT 1 | |
320 | static int skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; | |
321 | ||
322 | module_param(skd_max_req_per_msg, int, 0444); | |
323 | MODULE_PARM_DESC(skd_max_req_per_msg, | |
324 | "Maximum SCSI requests packed in a single message." | |
2da7b403 | 325 | " (1-" __stringify(SKD_MAX_REQ_PER_MSG) ", default==1)"); |
e67f86b3 AB |
326 | |
327 | #define SKD_MAX_QUEUE_DEPTH_DEFAULT 64 | |
328 | #define SKD_MAX_QUEUE_DEPTH_DEFAULT_STR "64" | |
329 | static int skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; | |
330 | ||
331 | module_param(skd_max_queue_depth, int, 0444); | |
332 | MODULE_PARM_DESC(skd_max_queue_depth, | |
333 | "Maximum SCSI requests issued to s1120." | |
334 | " (1-200, default==" SKD_MAX_QUEUE_DEPTH_DEFAULT_STR ")"); | |
335 | ||
336 | static int skd_sgs_per_request = SKD_N_SG_PER_REQ_DEFAULT; | |
337 | module_param(skd_sgs_per_request, int, 0444); | |
338 | MODULE_PARM_DESC(skd_sgs_per_request, | |
339 | "Maximum SG elements per block request." | |
340 | " (1-4096, default==256)"); | |
341 | ||
63214121 | 342 | static int skd_max_pass_thru = 1; |
e67f86b3 AB |
343 | module_param(skd_max_pass_thru, int, 0444); |
344 | MODULE_PARM_DESC(skd_max_pass_thru, | |
63214121 | 345 | "Maximum SCSI pass-thru at a time. IGNORED"); |
e67f86b3 AB |
346 | |
347 | module_param(skd_dbg_level, int, 0444); | |
348 | MODULE_PARM_DESC(skd_dbg_level, "s1120 debug level (0,1,2)"); | |
349 | ||
350 | module_param(skd_isr_comp_limit, int, 0444); | |
351 | MODULE_PARM_DESC(skd_isr_comp_limit, "s1120 isr comp limit (0=none) default=4"); | |
352 | ||
e67f86b3 AB |
353 | /* Major device number dynamically assigned. */ |
354 | static u32 skd_major; | |
355 | ||
e67f86b3 AB |
356 | static void skd_destruct(struct skd_device *skdev); |
357 | static const struct block_device_operations skd_blockdev_ops; | |
358 | static void skd_send_fitmsg(struct skd_device *skdev, | |
359 | struct skd_fitmsg_context *skmsg); | |
360 | static void skd_send_special_fitmsg(struct skd_device *skdev, | |
361 | struct skd_special_context *skspcl); | |
2a842aca | 362 | static bool skd_preop_sg_list(struct skd_device *skdev, |
e67f86b3 AB |
363 | struct skd_request_context *skreq); |
364 | static void skd_postop_sg_list(struct skd_device *skdev, | |
365 | struct skd_request_context *skreq); | |
366 | ||
367 | static void skd_restart_device(struct skd_device *skdev); | |
368 | static int skd_quiesce_dev(struct skd_device *skdev); | |
369 | static int skd_unquiesce_dev(struct skd_device *skdev); | |
e67f86b3 AB |
370 | static void skd_disable_interrupts(struct skd_device *skdev); |
371 | static void skd_isr_fwstate(struct skd_device *skdev); | |
79ce12a8 | 372 | static void skd_recover_requests(struct skd_device *skdev); |
e67f86b3 AB |
373 | static void skd_soft_reset(struct skd_device *skdev); |
374 | ||
e67f86b3 AB |
375 | const char *skd_drive_state_to_str(int state); |
376 | const char *skd_skdev_state_to_str(enum skd_drvr_state state); | |
377 | static void skd_log_skdev(struct skd_device *skdev, const char *event); | |
e67f86b3 AB |
378 | static void skd_log_skreq(struct skd_device *skdev, |
379 | struct skd_request_context *skreq, const char *event); | |
380 | ||
e67f86b3 AB |
381 | /* |
382 | ***************************************************************************** | |
383 | * READ/WRITE REQUESTS | |
384 | ***************************************************************************** | |
385 | */ | |
7baa8572 | 386 | static bool skd_inc_in_flight(struct request *rq, void *data, bool reserved) |
d4d0f5fc BVA |
387 | { |
388 | int *count = data; | |
389 | ||
390 | count++; | |
7baa8572 | 391 | return true; |
d4d0f5fc BVA |
392 | } |
393 | ||
394 | static int skd_in_flight(struct skd_device *skdev) | |
395 | { | |
396 | int count = 0; | |
397 | ||
398 | blk_mq_tagset_busy_iter(&skdev->tag_set, skd_inc_in_flight, &count); | |
399 | ||
400 | return count; | |
401 | } | |
402 | ||
e67f86b3 AB |
403 | static void |
404 | skd_prep_rw_cdb(struct skd_scsi_request *scsi_req, | |
405 | int data_dir, unsigned lba, | |
406 | unsigned count) | |
407 | { | |
408 | if (data_dir == READ) | |
fb4844b8 | 409 | scsi_req->cdb[0] = READ_10; |
e67f86b3 | 410 | else |
fb4844b8 | 411 | scsi_req->cdb[0] = WRITE_10; |
e67f86b3 AB |
412 | |
413 | scsi_req->cdb[1] = 0; | |
414 | scsi_req->cdb[2] = (lba & 0xff000000) >> 24; | |
415 | scsi_req->cdb[3] = (lba & 0xff0000) >> 16; | |
416 | scsi_req->cdb[4] = (lba & 0xff00) >> 8; | |
417 | scsi_req->cdb[5] = (lba & 0xff); | |
418 | scsi_req->cdb[6] = 0; | |
419 | scsi_req->cdb[7] = (count & 0xff00) >> 8; | |
420 | scsi_req->cdb[8] = count & 0xff; | |
421 | scsi_req->cdb[9] = 0; | |
422 | } | |
423 | ||
424 | static void | |
425 | skd_prep_zerosize_flush_cdb(struct skd_scsi_request *scsi_req, | |
38d4a1bb | 426 | struct skd_request_context *skreq) |
e67f86b3 AB |
427 | { |
428 | skreq->flush_cmd = 1; | |
429 | ||
fb4844b8 | 430 | scsi_req->cdb[0] = SYNCHRONIZE_CACHE; |
e67f86b3 AB |
431 | scsi_req->cdb[1] = 0; |
432 | scsi_req->cdb[2] = 0; | |
433 | scsi_req->cdb[3] = 0; | |
434 | scsi_req->cdb[4] = 0; | |
435 | scsi_req->cdb[5] = 0; | |
436 | scsi_req->cdb[6] = 0; | |
437 | scsi_req->cdb[7] = 0; | |
438 | scsi_req->cdb[8] = 0; | |
439 | scsi_req->cdb[9] = 0; | |
440 | } | |
441 | ||
3d17a679 BVA |
442 | /* |
443 | * Return true if and only if all pending requests should be failed. | |
444 | */ | |
445 | static bool skd_fail_all(struct request_queue *q) | |
cb6981b9 BVA |
446 | { |
447 | struct skd_device *skdev = q->queuedata; | |
448 | ||
449 | SKD_ASSERT(skdev->state != SKD_DRVR_STATE_ONLINE); | |
450 | ||
451 | skd_log_skdev(skdev, "req_not_online"); | |
452 | switch (skdev->state) { | |
453 | case SKD_DRVR_STATE_PAUSING: | |
454 | case SKD_DRVR_STATE_PAUSED: | |
455 | case SKD_DRVR_STATE_STARTING: | |
456 | case SKD_DRVR_STATE_RESTARTING: | |
457 | case SKD_DRVR_STATE_WAIT_BOOT: | |
458 | /* In case of starting, we haven't started the queue, | |
459 | * so we can't get here... but requests are | |
460 | * possibly hanging out waiting for us because we | |
461 | * reported the dev/skd0 already. They'll wait | |
462 | * forever if connect doesn't complete. | |
463 | * What to do??? delay dev/skd0 ?? | |
464 | */ | |
465 | case SKD_DRVR_STATE_BUSY: | |
466 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
467 | case SKD_DRVR_STATE_BUSY_ERASE: | |
3d17a679 | 468 | return false; |
cb6981b9 BVA |
469 | |
470 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
471 | case SKD_DRVR_STATE_STOPPING: | |
472 | case SKD_DRVR_STATE_SYNCING: | |
473 | case SKD_DRVR_STATE_FAULT: | |
474 | case SKD_DRVR_STATE_DISAPPEARED: | |
475 | default: | |
3d17a679 | 476 | return true; |
cb6981b9 | 477 | } |
cb6981b9 | 478 | } |
e67f86b3 | 479 | |
c39c6c77 BVA |
480 | static blk_status_t skd_mq_queue_rq(struct blk_mq_hw_ctx *hctx, |
481 | const struct blk_mq_queue_data *mqd) | |
e67f86b3 | 482 | { |
c39c6c77 | 483 | struct request *const req = mqd->rq; |
91f85da4 | 484 | struct request_queue *const q = req->q; |
e67f86b3 | 485 | struct skd_device *skdev = q->queuedata; |
91f85da4 BVA |
486 | struct skd_fitmsg_context *skmsg; |
487 | struct fit_msg_hdr *fmh; | |
488 | const u32 tag = blk_mq_unique_tag(req); | |
e7278a8b | 489 | struct skd_request_context *const skreq = blk_mq_rq_to_pdu(req); |
e67f86b3 | 490 | struct skd_scsi_request *scsi_req; |
74c74282 | 491 | unsigned long flags = 0; |
e2bb5548 BVA |
492 | const u32 lba = blk_rq_pos(req); |
493 | const u32 count = blk_rq_sectors(req); | |
494 | const int data_dir = rq_data_dir(req); | |
91f85da4 | 495 | |
c39c6c77 BVA |
496 | if (unlikely(skdev->state != SKD_DRVR_STATE_ONLINE)) |
497 | return skd_fail_all(q) ? BLK_STS_IOERR : BLK_STS_RESOURCE; | |
498 | ||
1bee4243 CH |
499 | if (!(req->rq_flags & RQF_DONTPREP)) { |
500 | skreq->retries = 0; | |
501 | req->rq_flags |= RQF_DONTPREP; | |
502 | } | |
503 | ||
c39c6c77 BVA |
504 | blk_mq_start_request(req); |
505 | ||
91f85da4 BVA |
506 | WARN_ONCE(tag >= skd_max_queue_depth, "%#x > %#x (nr_requests = %lu)\n", |
507 | tag, skd_max_queue_depth, q->nr_requests); | |
508 | ||
509 | SKD_ASSERT(skreq->state == SKD_REQ_STATE_IDLE); | |
510 | ||
91f85da4 BVA |
511 | dev_dbg(&skdev->pdev->dev, |
512 | "new req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", req, lba, | |
513 | lba, count, count, data_dir); | |
514 | ||
515 | skreq->id = tag + SKD_ID_RW_REQUEST; | |
516 | skreq->flush_cmd = 0; | |
517 | skreq->n_sg = 0; | |
518 | skreq->sg_byte_count = 0; | |
519 | ||
91f85da4 BVA |
520 | skreq->fitmsg_id = 0; |
521 | ||
522 | skreq->data_dir = data_dir == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
523 | ||
524 | if (req->bio && !skd_preop_sg_list(skdev, skreq)) { | |
525 | dev_dbg(&skdev->pdev->dev, "error Out\n"); | |
795bc1b5 BVA |
526 | skreq->status = BLK_STS_RESOURCE; |
527 | blk_mq_complete_request(req); | |
c39c6c77 | 528 | return BLK_STS_OK; |
91f85da4 BVA |
529 | } |
530 | ||
a3db102d BVA |
531 | dma_sync_single_for_device(&skdev->pdev->dev, skreq->sksg_dma_address, |
532 | skreq->n_sg * | |
533 | sizeof(struct fit_sg_descriptor), | |
534 | DMA_TO_DEVICE); | |
535 | ||
91f85da4 | 536 | /* Either a FIT msg is in progress or we have to start one. */ |
74c74282 BVA |
537 | if (skd_max_req_per_msg == 1) { |
538 | skmsg = NULL; | |
539 | } else { | |
540 | spin_lock_irqsave(&skdev->lock, flags); | |
541 | skmsg = skdev->skmsg; | |
542 | } | |
91f85da4 BVA |
543 | if (!skmsg) { |
544 | skmsg = &skdev->skmsg_table[tag]; | |
545 | skdev->skmsg = skmsg; | |
546 | ||
547 | /* Initialize the FIT msg header */ | |
548 | fmh = &skmsg->msg_buf->fmh; | |
549 | memset(fmh, 0, sizeof(*fmh)); | |
550 | fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; | |
551 | skmsg->length = sizeof(*fmh); | |
552 | } else { | |
553 | fmh = &skmsg->msg_buf->fmh; | |
554 | } | |
555 | ||
556 | skreq->fitmsg_id = skmsg->id; | |
557 | ||
558 | scsi_req = &skmsg->msg_buf->scsi[fmh->num_protocol_cmds_coalesced]; | |
559 | memset(scsi_req, 0, sizeof(*scsi_req)); | |
560 | ||
91f85da4 | 561 | scsi_req->hdr.tag = skreq->id; |
e2bb5548 BVA |
562 | scsi_req->hdr.sg_list_dma_address = |
563 | cpu_to_be64(skreq->sksg_dma_address); | |
91f85da4 | 564 | |
e2bb5548 | 565 | if (req_op(req) == REQ_OP_FLUSH) { |
91f85da4 BVA |
566 | skd_prep_zerosize_flush_cdb(scsi_req, skreq); |
567 | SKD_ASSERT(skreq->flush_cmd == 1); | |
568 | } else { | |
569 | skd_prep_rw_cdb(scsi_req, data_dir, lba, count); | |
570 | } | |
571 | ||
e2bb5548 | 572 | if (req->cmd_flags & REQ_FUA) |
91f85da4 BVA |
573 | scsi_req->cdb[1] |= SKD_FUA_NV; |
574 | ||
575 | scsi_req->hdr.sg_list_len_bytes = cpu_to_be32(skreq->sg_byte_count); | |
576 | ||
577 | /* Complete resource allocations. */ | |
578 | skreq->state = SKD_REQ_STATE_BUSY; | |
579 | ||
580 | skmsg->length += sizeof(struct skd_scsi_request); | |
581 | fmh->num_protocol_cmds_coalesced++; | |
582 | ||
91f85da4 | 583 | dev_dbg(&skdev->pdev->dev, "req=0x%x busy=%d\n", skreq->id, |
d4d0f5fc | 584 | skd_in_flight(skdev)); |
91f85da4 BVA |
585 | |
586 | /* | |
587 | * If the FIT msg buffer is full send it. | |
588 | */ | |
74c74282 | 589 | if (skd_max_req_per_msg == 1) { |
91f85da4 | 590 | skd_send_fitmsg(skdev, skmsg); |
74c74282 | 591 | } else { |
c39c6c77 | 592 | if (mqd->last || |
74c74282 BVA |
593 | fmh->num_protocol_cmds_coalesced >= skd_max_req_per_msg) { |
594 | skd_send_fitmsg(skdev, skmsg); | |
595 | skdev->skmsg = NULL; | |
596 | } | |
597 | spin_unlock_irqrestore(&skdev->lock, flags); | |
91f85da4 | 598 | } |
e67f86b3 | 599 | |
ca33dd92 | 600 | return BLK_STS_OK; |
e67f86b3 AB |
601 | } |
602 | ||
f2fe4459 BVA |
603 | static enum blk_eh_timer_return skd_timed_out(struct request *req, |
604 | bool reserved) | |
a74d5b76 BVA |
605 | { |
606 | struct skd_device *skdev = req->q->queuedata; | |
607 | ||
608 | dev_err(&skdev->pdev->dev, "request with tag %#x timed out\n", | |
609 | blk_mq_unique_tag(req)); | |
610 | ||
f2fe4459 | 611 | return BLK_EH_RESET_TIMER; |
a74d5b76 BVA |
612 | } |
613 | ||
296cb94c | 614 | static void skd_complete_rq(struct request *req) |
a74d5b76 | 615 | { |
a74d5b76 | 616 | struct skd_request_context *skreq = blk_mq_rq_to_pdu(req); |
a74d5b76 | 617 | |
f2fe4459 | 618 | blk_mq_end_request(req, skreq->status); |
a74d5b76 BVA |
619 | } |
620 | ||
2a842aca | 621 | static bool skd_preop_sg_list(struct skd_device *skdev, |
38d4a1bb | 622 | struct skd_request_context *skreq) |
e67f86b3 | 623 | { |
e7278a8b | 624 | struct request *req = blk_mq_rq_from_pdu(skreq); |
06f824c4 | 625 | struct scatterlist *sgl = &skreq->sg[0], *sg; |
e67f86b3 AB |
626 | int n_sg; |
627 | int i; | |
628 | ||
629 | skreq->sg_byte_count = 0; | |
630 | ||
b1824eef BVA |
631 | WARN_ON_ONCE(skreq->data_dir != DMA_TO_DEVICE && |
632 | skreq->data_dir != DMA_FROM_DEVICE); | |
e67f86b3 | 633 | |
06f824c4 | 634 | n_sg = blk_rq_map_sg(skdev->queue, req, sgl); |
e67f86b3 | 635 | if (n_sg <= 0) |
2a842aca | 636 | return false; |
e67f86b3 AB |
637 | |
638 | /* | |
639 | * Map scatterlist to PCI bus addresses. | |
640 | * Note PCI might change the number of entries. | |
641 | */ | |
13812621 | 642 | n_sg = dma_map_sg(&skdev->pdev->dev, sgl, n_sg, skreq->data_dir); |
e67f86b3 | 643 | if (n_sg <= 0) |
2a842aca | 644 | return false; |
e67f86b3 AB |
645 | |
646 | SKD_ASSERT(n_sg <= skdev->sgs_per_request); | |
647 | ||
648 | skreq->n_sg = n_sg; | |
649 | ||
06f824c4 | 650 | for_each_sg(sgl, sg, n_sg, i) { |
e67f86b3 | 651 | struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; |
06f824c4 BVA |
652 | u32 cnt = sg_dma_len(sg); |
653 | uint64_t dma_addr = sg_dma_address(sg); | |
e67f86b3 AB |
654 | |
655 | sgd->control = FIT_SGD_CONTROL_NOT_LAST; | |
656 | sgd->byte_count = cnt; | |
657 | skreq->sg_byte_count += cnt; | |
658 | sgd->host_side_addr = dma_addr; | |
659 | sgd->dev_side_addr = 0; | |
660 | } | |
661 | ||
662 | skreq->sksg_list[n_sg - 1].next_desc_ptr = 0LL; | |
663 | skreq->sksg_list[n_sg - 1].control = FIT_SGD_CONTROL_LAST; | |
664 | ||
665 | if (unlikely(skdev->dbg_level > 1)) { | |
f98806d6 | 666 | dev_dbg(&skdev->pdev->dev, |
ea870bb2 HD |
667 | "skreq=%x sksg_list=%p sksg_dma=%pad\n", |
668 | skreq->id, skreq->sksg_list, &skreq->sksg_dma_address); | |
e67f86b3 AB |
669 | for (i = 0; i < n_sg; i++) { |
670 | struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; | |
f98806d6 BVA |
671 | |
672 | dev_dbg(&skdev->pdev->dev, | |
673 | " sg[%d] count=%u ctrl=0x%x addr=0x%llx next=0x%llx\n", | |
674 | i, sgd->byte_count, sgd->control, | |
675 | sgd->host_side_addr, sgd->next_desc_ptr); | |
e67f86b3 AB |
676 | } |
677 | } | |
678 | ||
2a842aca | 679 | return true; |
e67f86b3 AB |
680 | } |
681 | ||
fcd37eb3 | 682 | static void skd_postop_sg_list(struct skd_device *skdev, |
38d4a1bb | 683 | struct skd_request_context *skreq) |
e67f86b3 | 684 | { |
e67f86b3 AB |
685 | /* |
686 | * restore the next ptr for next IO request so we | |
687 | * don't have to set it every time. | |
688 | */ | |
689 | skreq->sksg_list[skreq->n_sg - 1].next_desc_ptr = | |
690 | skreq->sksg_dma_address + | |
691 | ((skreq->n_sg) * sizeof(struct fit_sg_descriptor)); | |
13812621 CH |
692 | dma_unmap_sg(&skdev->pdev->dev, &skreq->sg[0], skreq->n_sg, |
693 | skreq->data_dir); | |
e67f86b3 AB |
694 | } |
695 | ||
e67f86b3 AB |
696 | /* |
697 | ***************************************************************************** | |
698 | * TIMER | |
699 | ***************************************************************************** | |
700 | */ | |
701 | ||
702 | static void skd_timer_tick_not_online(struct skd_device *skdev); | |
703 | ||
ca33dd92 BVA |
704 | static void skd_start_queue(struct work_struct *work) |
705 | { | |
706 | struct skd_device *skdev = container_of(work, typeof(*skdev), | |
707 | start_queue); | |
708 | ||
709 | /* | |
710 | * Although it is safe to call blk_start_queue() from interrupt | |
711 | * context, blk_mq_start_hw_queues() must not be called from | |
712 | * interrupt context. | |
713 | */ | |
714 | blk_mq_start_hw_queues(skdev->queue); | |
715 | } | |
716 | ||
e99e88a9 | 717 | static void skd_timer_tick(struct timer_list *t) |
e67f86b3 | 718 | { |
e99e88a9 | 719 | struct skd_device *skdev = from_timer(skdev, t, timer); |
e67f86b3 AB |
720 | unsigned long reqflags; |
721 | u32 state; | |
722 | ||
723 | if (skdev->state == SKD_DRVR_STATE_FAULT) | |
724 | /* The driver has declared fault, and we want it to | |
725 | * stay that way until driver is reloaded. | |
726 | */ | |
727 | return; | |
728 | ||
729 | spin_lock_irqsave(&skdev->lock, reqflags); | |
730 | ||
731 | state = SKD_READL(skdev, FIT_STATUS); | |
732 | state &= FIT_SR_DRIVE_STATE_MASK; | |
733 | if (state != skdev->drive_state) | |
734 | skd_isr_fwstate(skdev); | |
735 | ||
a74d5b76 | 736 | if (skdev->state != SKD_DRVR_STATE_ONLINE) |
e67f86b3 | 737 | skd_timer_tick_not_online(skdev); |
e67f86b3 | 738 | |
e67f86b3 AB |
739 | mod_timer(&skdev->timer, (jiffies + HZ)); |
740 | ||
741 | spin_unlock_irqrestore(&skdev->lock, reqflags); | |
742 | } | |
743 | ||
744 | static void skd_timer_tick_not_online(struct skd_device *skdev) | |
745 | { | |
746 | switch (skdev->state) { | |
747 | case SKD_DRVR_STATE_IDLE: | |
748 | case SKD_DRVR_STATE_LOAD: | |
749 | break; | |
750 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
f98806d6 BVA |
751 | dev_dbg(&skdev->pdev->dev, |
752 | "drive busy sanitize[%x], driver[%x]\n", | |
753 | skdev->drive_state, skdev->state); | |
e67f86b3 AB |
754 | /* If we've been in sanitize for 3 seconds, we figure we're not |
755 | * going to get anymore completions, so recover requests now | |
756 | */ | |
757 | if (skdev->timer_countdown > 0) { | |
758 | skdev->timer_countdown--; | |
759 | return; | |
760 | } | |
79ce12a8 | 761 | skd_recover_requests(skdev); |
e67f86b3 AB |
762 | break; |
763 | ||
764 | case SKD_DRVR_STATE_BUSY: | |
765 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
766 | case SKD_DRVR_STATE_BUSY_ERASE: | |
f98806d6 BVA |
767 | dev_dbg(&skdev->pdev->dev, "busy[%x], countdown=%d\n", |
768 | skdev->state, skdev->timer_countdown); | |
e67f86b3 AB |
769 | if (skdev->timer_countdown > 0) { |
770 | skdev->timer_countdown--; | |
771 | return; | |
772 | } | |
f98806d6 BVA |
773 | dev_dbg(&skdev->pdev->dev, |
774 | "busy[%x], timedout=%d, restarting device.", | |
775 | skdev->state, skdev->timer_countdown); | |
e67f86b3 AB |
776 | skd_restart_device(skdev); |
777 | break; | |
778 | ||
779 | case SKD_DRVR_STATE_WAIT_BOOT: | |
780 | case SKD_DRVR_STATE_STARTING: | |
781 | if (skdev->timer_countdown > 0) { | |
782 | skdev->timer_countdown--; | |
783 | return; | |
784 | } | |
785 | /* For now, we fault the drive. Could attempt resets to | |
786 | * revcover at some point. */ | |
787 | skdev->state = SKD_DRVR_STATE_FAULT; | |
788 | ||
f98806d6 BVA |
789 | dev_err(&skdev->pdev->dev, "DriveFault Connect Timeout (%x)\n", |
790 | skdev->drive_state); | |
e67f86b3 AB |
791 | |
792 | /*start the queue so we can respond with error to requests */ | |
793 | /* wakeup anyone waiting for startup complete */ | |
ca33dd92 | 794 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
795 | skdev->gendisk_on = -1; |
796 | wake_up_interruptible(&skdev->waitq); | |
797 | break; | |
798 | ||
799 | case SKD_DRVR_STATE_ONLINE: | |
800 | /* shouldn't get here. */ | |
801 | break; | |
802 | ||
803 | case SKD_DRVR_STATE_PAUSING: | |
804 | case SKD_DRVR_STATE_PAUSED: | |
805 | break; | |
806 | ||
e67f86b3 AB |
807 | case SKD_DRVR_STATE_RESTARTING: |
808 | if (skdev->timer_countdown > 0) { | |
809 | skdev->timer_countdown--; | |
810 | return; | |
811 | } | |
812 | /* For now, we fault the drive. Could attempt resets to | |
813 | * revcover at some point. */ | |
814 | skdev->state = SKD_DRVR_STATE_FAULT; | |
f98806d6 BVA |
815 | dev_err(&skdev->pdev->dev, |
816 | "DriveFault Reconnect Timeout (%x)\n", | |
817 | skdev->drive_state); | |
e67f86b3 AB |
818 | |
819 | /* | |
820 | * Recovering does two things: | |
821 | * 1. completes IO with error | |
822 | * 2. reclaims dma resources | |
823 | * When is it safe to recover requests? | |
824 | * - if the drive state is faulted | |
825 | * - if the state is still soft reset after out timeout | |
826 | * - if the drive registers are dead (state = FF) | |
827 | * If it is "unsafe", we still need to recover, so we will | |
828 | * disable pci bus mastering and disable our interrupts. | |
829 | */ | |
830 | ||
831 | if ((skdev->drive_state == FIT_SR_DRIVE_SOFT_RESET) || | |
832 | (skdev->drive_state == FIT_SR_DRIVE_FAULT) || | |
833 | (skdev->drive_state == FIT_SR_DRIVE_STATE_MASK)) | |
834 | /* It never came out of soft reset. Try to | |
835 | * recover the requests and then let them | |
836 | * fail. This is to mitigate hung processes. */ | |
79ce12a8 | 837 | skd_recover_requests(skdev); |
e67f86b3 | 838 | else { |
f98806d6 BVA |
839 | dev_err(&skdev->pdev->dev, "Disable BusMaster (%x)\n", |
840 | skdev->drive_state); | |
e67f86b3 AB |
841 | pci_disable_device(skdev->pdev); |
842 | skd_disable_interrupts(skdev); | |
79ce12a8 | 843 | skd_recover_requests(skdev); |
e67f86b3 AB |
844 | } |
845 | ||
846 | /*start the queue so we can respond with error to requests */ | |
847 | /* wakeup anyone waiting for startup complete */ | |
ca33dd92 | 848 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
849 | skdev->gendisk_on = -1; |
850 | wake_up_interruptible(&skdev->waitq); | |
851 | break; | |
852 | ||
853 | case SKD_DRVR_STATE_RESUMING: | |
854 | case SKD_DRVR_STATE_STOPPING: | |
855 | case SKD_DRVR_STATE_SYNCING: | |
856 | case SKD_DRVR_STATE_FAULT: | |
857 | case SKD_DRVR_STATE_DISAPPEARED: | |
858 | default: | |
859 | break; | |
860 | } | |
861 | } | |
862 | ||
863 | static int skd_start_timer(struct skd_device *skdev) | |
864 | { | |
865 | int rc; | |
866 | ||
e99e88a9 | 867 | timer_setup(&skdev->timer, skd_timer_tick, 0); |
e67f86b3 AB |
868 | |
869 | rc = mod_timer(&skdev->timer, (jiffies + HZ)); | |
870 | if (rc) | |
f98806d6 | 871 | dev_err(&skdev->pdev->dev, "failed to start timer %d\n", rc); |
e67f86b3 AB |
872 | return rc; |
873 | } | |
874 | ||
875 | static void skd_kill_timer(struct skd_device *skdev) | |
876 | { | |
877 | del_timer_sync(&skdev->timer); | |
878 | } | |
879 | ||
e67f86b3 AB |
880 | /* |
881 | ***************************************************************************** | |
882 | * INTERNAL REQUESTS -- generated by driver itself | |
883 | ***************************************************************************** | |
884 | */ | |
885 | ||
886 | static int skd_format_internal_skspcl(struct skd_device *skdev) | |
887 | { | |
888 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
889 | struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[0]; | |
890 | struct fit_msg_hdr *fmh; | |
891 | uint64_t dma_address; | |
892 | struct skd_scsi_request *scsi; | |
893 | ||
d891fe60 | 894 | fmh = &skspcl->msg_buf->fmh; |
e67f86b3 AB |
895 | fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; |
896 | fmh->num_protocol_cmds_coalesced = 1; | |
897 | ||
d891fe60 | 898 | scsi = &skspcl->msg_buf->scsi[0]; |
e67f86b3 AB |
899 | memset(scsi, 0, sizeof(*scsi)); |
900 | dma_address = skspcl->req.sksg_dma_address; | |
901 | scsi->hdr.sg_list_dma_address = cpu_to_be64(dma_address); | |
32494df9 | 902 | skspcl->req.n_sg = 1; |
e67f86b3 AB |
903 | sgd->control = FIT_SGD_CONTROL_LAST; |
904 | sgd->byte_count = 0; | |
905 | sgd->host_side_addr = skspcl->db_dma_address; | |
906 | sgd->dev_side_addr = 0; | |
907 | sgd->next_desc_ptr = 0LL; | |
908 | ||
909 | return 1; | |
910 | } | |
911 | ||
912 | #define WR_BUF_SIZE SKD_N_INTERNAL_BYTES | |
913 | ||
914 | static void skd_send_internal_skspcl(struct skd_device *skdev, | |
915 | struct skd_special_context *skspcl, | |
916 | u8 opcode) | |
917 | { | |
918 | struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[0]; | |
919 | struct skd_scsi_request *scsi; | |
920 | unsigned char *buf = skspcl->data_buf; | |
921 | int i; | |
922 | ||
923 | if (skspcl->req.state != SKD_REQ_STATE_IDLE) | |
924 | /* | |
925 | * A refresh is already in progress. | |
926 | * Just wait for it to finish. | |
927 | */ | |
928 | return; | |
929 | ||
e67f86b3 | 930 | skspcl->req.state = SKD_REQ_STATE_BUSY; |
e67f86b3 | 931 | |
d891fe60 | 932 | scsi = &skspcl->msg_buf->scsi[0]; |
e67f86b3 AB |
933 | scsi->hdr.tag = skspcl->req.id; |
934 | ||
935 | memset(scsi->cdb, 0, sizeof(scsi->cdb)); | |
936 | ||
937 | switch (opcode) { | |
938 | case TEST_UNIT_READY: | |
939 | scsi->cdb[0] = TEST_UNIT_READY; | |
940 | sgd->byte_count = 0; | |
941 | scsi->hdr.sg_list_len_bytes = 0; | |
942 | break; | |
943 | ||
944 | case READ_CAPACITY: | |
945 | scsi->cdb[0] = READ_CAPACITY; | |
946 | sgd->byte_count = SKD_N_READ_CAP_BYTES; | |
947 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
948 | break; | |
949 | ||
950 | case INQUIRY: | |
951 | scsi->cdb[0] = INQUIRY; | |
952 | scsi->cdb[1] = 0x01; /* evpd */ | |
953 | scsi->cdb[2] = 0x80; /* serial number page */ | |
954 | scsi->cdb[4] = 0x10; | |
955 | sgd->byte_count = 16; | |
956 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
957 | break; | |
958 | ||
959 | case SYNCHRONIZE_CACHE: | |
960 | scsi->cdb[0] = SYNCHRONIZE_CACHE; | |
961 | sgd->byte_count = 0; | |
962 | scsi->hdr.sg_list_len_bytes = 0; | |
963 | break; | |
964 | ||
965 | case WRITE_BUFFER: | |
966 | scsi->cdb[0] = WRITE_BUFFER; | |
967 | scsi->cdb[1] = 0x02; | |
968 | scsi->cdb[7] = (WR_BUF_SIZE & 0xFF00) >> 8; | |
969 | scsi->cdb[8] = WR_BUF_SIZE & 0xFF; | |
970 | sgd->byte_count = WR_BUF_SIZE; | |
971 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
972 | /* fill incrementing byte pattern */ | |
973 | for (i = 0; i < sgd->byte_count; i++) | |
974 | buf[i] = i & 0xFF; | |
975 | break; | |
976 | ||
977 | case READ_BUFFER: | |
978 | scsi->cdb[0] = READ_BUFFER; | |
979 | scsi->cdb[1] = 0x02; | |
980 | scsi->cdb[7] = (WR_BUF_SIZE & 0xFF00) >> 8; | |
981 | scsi->cdb[8] = WR_BUF_SIZE & 0xFF; | |
982 | sgd->byte_count = WR_BUF_SIZE; | |
983 | scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); | |
984 | memset(skspcl->data_buf, 0, sgd->byte_count); | |
985 | break; | |
986 | ||
987 | default: | |
988 | SKD_ASSERT("Don't know what to send"); | |
989 | return; | |
990 | ||
991 | } | |
992 | skd_send_special_fitmsg(skdev, skspcl); | |
993 | } | |
994 | ||
995 | static void skd_refresh_device_data(struct skd_device *skdev) | |
996 | { | |
997 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
998 | ||
999 | skd_send_internal_skspcl(skdev, skspcl, TEST_UNIT_READY); | |
1000 | } | |
1001 | ||
1002 | static int skd_chk_read_buf(struct skd_device *skdev, | |
1003 | struct skd_special_context *skspcl) | |
1004 | { | |
1005 | unsigned char *buf = skspcl->data_buf; | |
1006 | int i; | |
1007 | ||
1008 | /* check for incrementing byte pattern */ | |
1009 | for (i = 0; i < WR_BUF_SIZE; i++) | |
1010 | if (buf[i] != (i & 0xFF)) | |
1011 | return 1; | |
1012 | ||
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | static void skd_log_check_status(struct skd_device *skdev, u8 status, u8 key, | |
1017 | u8 code, u8 qual, u8 fruc) | |
1018 | { | |
1019 | /* If the check condition is of special interest, log a message */ | |
1020 | if ((status == SAM_STAT_CHECK_CONDITION) && (key == 0x02) | |
1021 | && (code == 0x04) && (qual == 0x06)) { | |
f98806d6 BVA |
1022 | dev_err(&skdev->pdev->dev, |
1023 | "*** LOST_WRITE_DATA ERROR *** key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", | |
1024 | key, code, qual, fruc); | |
e67f86b3 AB |
1025 | } |
1026 | } | |
1027 | ||
1028 | static void skd_complete_internal(struct skd_device *skdev, | |
85e34112 BVA |
1029 | struct fit_completion_entry_v1 *skcomp, |
1030 | struct fit_comp_error_info *skerr, | |
e67f86b3 AB |
1031 | struct skd_special_context *skspcl) |
1032 | { | |
1033 | u8 *buf = skspcl->data_buf; | |
1034 | u8 status; | |
1035 | int i; | |
d891fe60 | 1036 | struct skd_scsi_request *scsi = &skspcl->msg_buf->scsi[0]; |
e67f86b3 | 1037 | |
760b48ca BVA |
1038 | lockdep_assert_held(&skdev->lock); |
1039 | ||
e67f86b3 AB |
1040 | SKD_ASSERT(skspcl == &skdev->internal_skspcl); |
1041 | ||
f98806d6 | 1042 | dev_dbg(&skdev->pdev->dev, "complete internal %x\n", scsi->cdb[0]); |
e67f86b3 | 1043 | |
a3db102d BVA |
1044 | dma_sync_single_for_cpu(&skdev->pdev->dev, |
1045 | skspcl->db_dma_address, | |
1046 | skspcl->req.sksg_list[0].byte_count, | |
1047 | DMA_BIDIRECTIONAL); | |
1048 | ||
e67f86b3 AB |
1049 | skspcl->req.completion = *skcomp; |
1050 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
e67f86b3 AB |
1051 | |
1052 | status = skspcl->req.completion.status; | |
1053 | ||
1054 | skd_log_check_status(skdev, status, skerr->key, skerr->code, | |
1055 | skerr->qual, skerr->fruc); | |
1056 | ||
1057 | switch (scsi->cdb[0]) { | |
1058 | case TEST_UNIT_READY: | |
1059 | if (status == SAM_STAT_GOOD) | |
1060 | skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); | |
1061 | else if ((status == SAM_STAT_CHECK_CONDITION) && | |
1062 | (skerr->key == MEDIUM_ERROR)) | |
1063 | skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); | |
1064 | else { | |
1065 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
f98806d6 BVA |
1066 | dev_dbg(&skdev->pdev->dev, |
1067 | "TUR failed, don't send anymore state 0x%x\n", | |
1068 | skdev->state); | |
e67f86b3 AB |
1069 | return; |
1070 | } | |
f98806d6 BVA |
1071 | dev_dbg(&skdev->pdev->dev, |
1072 | "**** TUR failed, retry skerr\n"); | |
fb4844b8 BVA |
1073 | skd_send_internal_skspcl(skdev, skspcl, |
1074 | TEST_UNIT_READY); | |
e67f86b3 AB |
1075 | } |
1076 | break; | |
1077 | ||
1078 | case WRITE_BUFFER: | |
1079 | if (status == SAM_STAT_GOOD) | |
1080 | skd_send_internal_skspcl(skdev, skspcl, READ_BUFFER); | |
1081 | else { | |
1082 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
f98806d6 BVA |
1083 | dev_dbg(&skdev->pdev->dev, |
1084 | "write buffer failed, don't send anymore state 0x%x\n", | |
1085 | skdev->state); | |
e67f86b3 AB |
1086 | return; |
1087 | } | |
f98806d6 BVA |
1088 | dev_dbg(&skdev->pdev->dev, |
1089 | "**** write buffer failed, retry skerr\n"); | |
fb4844b8 BVA |
1090 | skd_send_internal_skspcl(skdev, skspcl, |
1091 | TEST_UNIT_READY); | |
e67f86b3 AB |
1092 | } |
1093 | break; | |
1094 | ||
1095 | case READ_BUFFER: | |
1096 | if (status == SAM_STAT_GOOD) { | |
1097 | if (skd_chk_read_buf(skdev, skspcl) == 0) | |
1098 | skd_send_internal_skspcl(skdev, skspcl, | |
1099 | READ_CAPACITY); | |
1100 | else { | |
f98806d6 BVA |
1101 | dev_err(&skdev->pdev->dev, |
1102 | "*** W/R Buffer mismatch %d ***\n", | |
1103 | skdev->connect_retries); | |
e67f86b3 AB |
1104 | if (skdev->connect_retries < |
1105 | SKD_MAX_CONNECT_RETRIES) { | |
1106 | skdev->connect_retries++; | |
1107 | skd_soft_reset(skdev); | |
1108 | } else { | |
f98806d6 BVA |
1109 | dev_err(&skdev->pdev->dev, |
1110 | "W/R Buffer Connect Error\n"); | |
e67f86b3 AB |
1111 | return; |
1112 | } | |
1113 | } | |
1114 | ||
1115 | } else { | |
1116 | if (skdev->state == SKD_DRVR_STATE_STOPPING) { | |
f98806d6 BVA |
1117 | dev_dbg(&skdev->pdev->dev, |
1118 | "read buffer failed, don't send anymore state 0x%x\n", | |
1119 | skdev->state); | |
e67f86b3 AB |
1120 | return; |
1121 | } | |
f98806d6 BVA |
1122 | dev_dbg(&skdev->pdev->dev, |
1123 | "**** read buffer failed, retry skerr\n"); | |
fb4844b8 BVA |
1124 | skd_send_internal_skspcl(skdev, skspcl, |
1125 | TEST_UNIT_READY); | |
e67f86b3 AB |
1126 | } |
1127 | break; | |
1128 | ||
1129 | case READ_CAPACITY: | |
1130 | skdev->read_cap_is_valid = 0; | |
1131 | if (status == SAM_STAT_GOOD) { | |
1132 | skdev->read_cap_last_lba = | |
1133 | (buf[0] << 24) | (buf[1] << 16) | | |
1134 | (buf[2] << 8) | buf[3]; | |
1135 | skdev->read_cap_blocksize = | |
1136 | (buf[4] << 24) | (buf[5] << 16) | | |
1137 | (buf[6] << 8) | buf[7]; | |
1138 | ||
f98806d6 BVA |
1139 | dev_dbg(&skdev->pdev->dev, "last lba %d, bs %d\n", |
1140 | skdev->read_cap_last_lba, | |
1141 | skdev->read_cap_blocksize); | |
e67f86b3 AB |
1142 | |
1143 | set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); | |
1144 | ||
1145 | skdev->read_cap_is_valid = 1; | |
1146 | ||
1147 | skd_send_internal_skspcl(skdev, skspcl, INQUIRY); | |
1148 | } else if ((status == SAM_STAT_CHECK_CONDITION) && | |
1149 | (skerr->key == MEDIUM_ERROR)) { | |
1150 | skdev->read_cap_last_lba = ~0; | |
1151 | set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); | |
f98806d6 | 1152 | dev_dbg(&skdev->pdev->dev, "**** MEDIUM ERROR caused READCAP to fail, ignore failure and continue to inquiry\n"); |
e67f86b3 AB |
1153 | skd_send_internal_skspcl(skdev, skspcl, INQUIRY); |
1154 | } else { | |
f98806d6 | 1155 | dev_dbg(&skdev->pdev->dev, "**** READCAP failed, retry TUR\n"); |
e67f86b3 AB |
1156 | skd_send_internal_skspcl(skdev, skspcl, |
1157 | TEST_UNIT_READY); | |
1158 | } | |
1159 | break; | |
1160 | ||
1161 | case INQUIRY: | |
1162 | skdev->inquiry_is_valid = 0; | |
1163 | if (status == SAM_STAT_GOOD) { | |
1164 | skdev->inquiry_is_valid = 1; | |
1165 | ||
1166 | for (i = 0; i < 12; i++) | |
1167 | skdev->inq_serial_num[i] = buf[i + 4]; | |
1168 | skdev->inq_serial_num[12] = 0; | |
1169 | } | |
1170 | ||
1171 | if (skd_unquiesce_dev(skdev) < 0) | |
f98806d6 | 1172 | dev_dbg(&skdev->pdev->dev, "**** failed, to ONLINE device\n"); |
e67f86b3 AB |
1173 | /* connection is complete */ |
1174 | skdev->connect_retries = 0; | |
1175 | break; | |
1176 | ||
1177 | case SYNCHRONIZE_CACHE: | |
1178 | if (status == SAM_STAT_GOOD) | |
1179 | skdev->sync_done = 1; | |
1180 | else | |
1181 | skdev->sync_done = -1; | |
1182 | wake_up_interruptible(&skdev->waitq); | |
1183 | break; | |
1184 | ||
1185 | default: | |
1186 | SKD_ASSERT("we didn't send this"); | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | /* | |
1191 | ***************************************************************************** | |
1192 | * FIT MESSAGES | |
1193 | ***************************************************************************** | |
1194 | */ | |
1195 | ||
1196 | static void skd_send_fitmsg(struct skd_device *skdev, | |
1197 | struct skd_fitmsg_context *skmsg) | |
1198 | { | |
1199 | u64 qcmd; | |
e67f86b3 | 1200 | |
ea870bb2 HD |
1201 | dev_dbg(&skdev->pdev->dev, "dma address %pad, busy=%d\n", |
1202 | &skmsg->mb_dma_address, skd_in_flight(skdev)); | |
6507f436 | 1203 | dev_dbg(&skdev->pdev->dev, "msg_buf %p\n", skmsg->msg_buf); |
e67f86b3 AB |
1204 | |
1205 | qcmd = skmsg->mb_dma_address; | |
1206 | qcmd |= FIT_QCMD_QID_NORMAL; | |
1207 | ||
e67f86b3 AB |
1208 | if (unlikely(skdev->dbg_level > 1)) { |
1209 | u8 *bp = (u8 *)skmsg->msg_buf; | |
1210 | int i; | |
1211 | for (i = 0; i < skmsg->length; i += 8) { | |
f98806d6 BVA |
1212 | dev_dbg(&skdev->pdev->dev, "msg[%2d] %8ph\n", i, |
1213 | &bp[i]); | |
e67f86b3 AB |
1214 | if (i == 0) |
1215 | i = 64 - 8; | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | if (skmsg->length > 256) | |
1220 | qcmd |= FIT_QCMD_MSGSIZE_512; | |
1221 | else if (skmsg->length > 128) | |
1222 | qcmd |= FIT_QCMD_MSGSIZE_256; | |
1223 | else if (skmsg->length > 64) | |
1224 | qcmd |= FIT_QCMD_MSGSIZE_128; | |
1225 | else | |
1226 | /* | |
1227 | * This makes no sense because the FIT msg header is | |
1228 | * 64 bytes. If the msg is only 64 bytes long it has | |
1229 | * no payload. | |
1230 | */ | |
1231 | qcmd |= FIT_QCMD_MSGSIZE_64; | |
1232 | ||
a3db102d BVA |
1233 | dma_sync_single_for_device(&skdev->pdev->dev, skmsg->mb_dma_address, |
1234 | skmsg->length, DMA_TO_DEVICE); | |
1235 | ||
5fbd545c BVA |
1236 | /* Make sure skd_msg_buf is written before the doorbell is triggered. */ |
1237 | smp_wmb(); | |
1238 | ||
e67f86b3 | 1239 | SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); |
e67f86b3 AB |
1240 | } |
1241 | ||
1242 | static void skd_send_special_fitmsg(struct skd_device *skdev, | |
1243 | struct skd_special_context *skspcl) | |
1244 | { | |
1245 | u64 qcmd; | |
1246 | ||
a3db102d BVA |
1247 | WARN_ON_ONCE(skspcl->req.n_sg != 1); |
1248 | ||
e67f86b3 AB |
1249 | if (unlikely(skdev->dbg_level > 1)) { |
1250 | u8 *bp = (u8 *)skspcl->msg_buf; | |
1251 | int i; | |
1252 | ||
1253 | for (i = 0; i < SKD_N_SPECIAL_FITMSG_BYTES; i += 8) { | |
f98806d6 BVA |
1254 | dev_dbg(&skdev->pdev->dev, " spcl[%2d] %8ph\n", i, |
1255 | &bp[i]); | |
e67f86b3 AB |
1256 | if (i == 0) |
1257 | i = 64 - 8; | |
1258 | } | |
1259 | ||
f98806d6 | 1260 | dev_dbg(&skdev->pdev->dev, |
ea870bb2 | 1261 | "skspcl=%p id=%04x sksg_list=%p sksg_dma=%pad\n", |
f98806d6 | 1262 | skspcl, skspcl->req.id, skspcl->req.sksg_list, |
ea870bb2 | 1263 | &skspcl->req.sksg_dma_address); |
e67f86b3 AB |
1264 | for (i = 0; i < skspcl->req.n_sg; i++) { |
1265 | struct fit_sg_descriptor *sgd = | |
1266 | &skspcl->req.sksg_list[i]; | |
1267 | ||
f98806d6 BVA |
1268 | dev_dbg(&skdev->pdev->dev, |
1269 | " sg[%d] count=%u ctrl=0x%x addr=0x%llx next=0x%llx\n", | |
1270 | i, sgd->byte_count, sgd->control, | |
1271 | sgd->host_side_addr, sgd->next_desc_ptr); | |
e67f86b3 AB |
1272 | } |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Special FIT msgs are always 128 bytes: a 64-byte FIT hdr | |
1277 | * and one 64-byte SSDI command. | |
1278 | */ | |
1279 | qcmd = skspcl->mb_dma_address; | |
1280 | qcmd |= FIT_QCMD_QID_NORMAL + FIT_QCMD_MSGSIZE_128; | |
1281 | ||
a3db102d BVA |
1282 | dma_sync_single_for_device(&skdev->pdev->dev, skspcl->mb_dma_address, |
1283 | SKD_N_SPECIAL_FITMSG_BYTES, DMA_TO_DEVICE); | |
1284 | dma_sync_single_for_device(&skdev->pdev->dev, | |
1285 | skspcl->req.sksg_dma_address, | |
1286 | 1 * sizeof(struct fit_sg_descriptor), | |
1287 | DMA_TO_DEVICE); | |
1288 | dma_sync_single_for_device(&skdev->pdev->dev, | |
1289 | skspcl->db_dma_address, | |
1290 | skspcl->req.sksg_list[0].byte_count, | |
1291 | DMA_BIDIRECTIONAL); | |
1292 | ||
5fbd545c BVA |
1293 | /* Make sure skd_msg_buf is written before the doorbell is triggered. */ |
1294 | smp_wmb(); | |
1295 | ||
e67f86b3 AB |
1296 | SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); |
1297 | } | |
1298 | ||
1299 | /* | |
1300 | ***************************************************************************** | |
1301 | * COMPLETION QUEUE | |
1302 | ***************************************************************************** | |
1303 | */ | |
1304 | ||
1305 | static void skd_complete_other(struct skd_device *skdev, | |
85e34112 BVA |
1306 | struct fit_completion_entry_v1 *skcomp, |
1307 | struct fit_comp_error_info *skerr); | |
e67f86b3 | 1308 | |
e67f86b3 AB |
1309 | struct sns_info { |
1310 | u8 type; | |
1311 | u8 stat; | |
1312 | u8 key; | |
1313 | u8 asc; | |
1314 | u8 ascq; | |
1315 | u8 mask; | |
1316 | enum skd_check_status_action action; | |
1317 | }; | |
1318 | ||
1319 | static struct sns_info skd_chkstat_table[] = { | |
1320 | /* Good */ | |
1321 | { 0x70, 0x02, RECOVERED_ERROR, 0, 0, 0x1c, | |
1322 | SKD_CHECK_STATUS_REPORT_GOOD }, | |
1323 | ||
1324 | /* Smart alerts */ | |
1325 | { 0x70, 0x02, NO_SENSE, 0x0B, 0x00, 0x1E, /* warnings */ | |
1326 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
1327 | { 0x70, 0x02, NO_SENSE, 0x5D, 0x00, 0x1E, /* thresholds */ | |
1328 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
1329 | { 0x70, 0x02, RECOVERED_ERROR, 0x0B, 0x01, 0x1F, /* temperature over trigger */ | |
1330 | SKD_CHECK_STATUS_REPORT_SMART_ALERT }, | |
1331 | ||
1332 | /* Retry (with limits) */ | |
1333 | { 0x70, 0x02, 0x0B, 0, 0, 0x1C, /* This one is for DMA ERROR */ | |
1334 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
1335 | { 0x70, 0x02, 0x06, 0x0B, 0x00, 0x1E, /* warnings */ | |
1336 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
1337 | { 0x70, 0x02, 0x06, 0x5D, 0x00, 0x1E, /* thresholds */ | |
1338 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
1339 | { 0x70, 0x02, 0x06, 0x80, 0x30, 0x1F, /* backup power */ | |
1340 | SKD_CHECK_STATUS_REQUEUE_REQUEST }, | |
1341 | ||
1342 | /* Busy (or about to be) */ | |
1343 | { 0x70, 0x02, 0x06, 0x3f, 0x01, 0x1F, /* fw changed */ | |
1344 | SKD_CHECK_STATUS_BUSY_IMMINENT }, | |
1345 | }; | |
1346 | ||
1347 | /* | |
1348 | * Look up status and sense data to decide how to handle the error | |
1349 | * from the device. | |
1350 | * mask says which fields must match e.g., mask=0x18 means check | |
1351 | * type and stat, ignore key, asc, ascq. | |
1352 | */ | |
1353 | ||
38d4a1bb MS |
1354 | static enum skd_check_status_action |
1355 | skd_check_status(struct skd_device *skdev, | |
85e34112 | 1356 | u8 cmp_status, struct fit_comp_error_info *skerr) |
e67f86b3 | 1357 | { |
0b2e0c07 | 1358 | int i; |
e67f86b3 | 1359 | |
f98806d6 BVA |
1360 | dev_err(&skdev->pdev->dev, "key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", |
1361 | skerr->key, skerr->code, skerr->qual, skerr->fruc); | |
e67f86b3 | 1362 | |
f98806d6 BVA |
1363 | dev_dbg(&skdev->pdev->dev, |
1364 | "stat: t=%02x stat=%02x k=%02x c=%02x q=%02x fruc=%02x\n", | |
1365 | skerr->type, cmp_status, skerr->key, skerr->code, skerr->qual, | |
1366 | skerr->fruc); | |
e67f86b3 AB |
1367 | |
1368 | /* Does the info match an entry in the good category? */ | |
0b2e0c07 | 1369 | for (i = 0; i < ARRAY_SIZE(skd_chkstat_table); i++) { |
e67f86b3 AB |
1370 | struct sns_info *sns = &skd_chkstat_table[i]; |
1371 | ||
1372 | if (sns->mask & 0x10) | |
1373 | if (skerr->type != sns->type) | |
1374 | continue; | |
1375 | ||
1376 | if (sns->mask & 0x08) | |
1377 | if (cmp_status != sns->stat) | |
1378 | continue; | |
1379 | ||
1380 | if (sns->mask & 0x04) | |
1381 | if (skerr->key != sns->key) | |
1382 | continue; | |
1383 | ||
1384 | if (sns->mask & 0x02) | |
1385 | if (skerr->code != sns->asc) | |
1386 | continue; | |
1387 | ||
1388 | if (sns->mask & 0x01) | |
1389 | if (skerr->qual != sns->ascq) | |
1390 | continue; | |
1391 | ||
1392 | if (sns->action == SKD_CHECK_STATUS_REPORT_SMART_ALERT) { | |
f98806d6 BVA |
1393 | dev_err(&skdev->pdev->dev, |
1394 | "SMART Alert: sense key/asc/ascq %02x/%02x/%02x\n", | |
1395 | skerr->key, skerr->code, skerr->qual); | |
e67f86b3 AB |
1396 | } |
1397 | return sns->action; | |
1398 | } | |
1399 | ||
1400 | /* No other match, so nonzero status means error, | |
1401 | * zero status means good | |
1402 | */ | |
1403 | if (cmp_status) { | |
f98806d6 | 1404 | dev_dbg(&skdev->pdev->dev, "status check: error\n"); |
e67f86b3 AB |
1405 | return SKD_CHECK_STATUS_REPORT_ERROR; |
1406 | } | |
1407 | ||
f98806d6 | 1408 | dev_dbg(&skdev->pdev->dev, "status check good default\n"); |
e67f86b3 AB |
1409 | return SKD_CHECK_STATUS_REPORT_GOOD; |
1410 | } | |
1411 | ||
1412 | static void skd_resolve_req_exception(struct skd_device *skdev, | |
f18c17c8 BVA |
1413 | struct skd_request_context *skreq, |
1414 | struct request *req) | |
e67f86b3 AB |
1415 | { |
1416 | u8 cmp_status = skreq->completion.status; | |
1417 | ||
1418 | switch (skd_check_status(skdev, cmp_status, &skreq->err_info)) { | |
1419 | case SKD_CHECK_STATUS_REPORT_GOOD: | |
1420 | case SKD_CHECK_STATUS_REPORT_SMART_ALERT: | |
795bc1b5 BVA |
1421 | skreq->status = BLK_STS_OK; |
1422 | blk_mq_complete_request(req); | |
e67f86b3 AB |
1423 | break; |
1424 | ||
1425 | case SKD_CHECK_STATUS_BUSY_IMMINENT: | |
1426 | skd_log_skreq(skdev, skreq, "retry(busy)"); | |
6d1f9dfd | 1427 | blk_mq_requeue_request(req, true); |
f98806d6 | 1428 | dev_info(&skdev->pdev->dev, "drive BUSY imminent\n"); |
e67f86b3 AB |
1429 | skdev->state = SKD_DRVR_STATE_BUSY_IMMINENT; |
1430 | skdev->timer_countdown = SKD_TIMER_MINUTES(20); | |
1431 | skd_quiesce_dev(skdev); | |
1432 | break; | |
1433 | ||
1434 | case SKD_CHECK_STATUS_REQUEUE_REQUEST: | |
1bee4243 | 1435 | if (++skreq->retries < SKD_MAX_RETRIES) { |
fcd37eb3 | 1436 | skd_log_skreq(skdev, skreq, "retry"); |
6d1f9dfd | 1437 | blk_mq_requeue_request(req, true); |
fcd37eb3 | 1438 | break; |
e67f86b3 | 1439 | } |
ce6882ba | 1440 | /* fall through */ |
e67f86b3 AB |
1441 | |
1442 | case SKD_CHECK_STATUS_REPORT_ERROR: | |
1443 | default: | |
795bc1b5 BVA |
1444 | skreq->status = BLK_STS_IOERR; |
1445 | blk_mq_complete_request(req); | |
e67f86b3 AB |
1446 | break; |
1447 | } | |
1448 | } | |
1449 | ||
e67f86b3 AB |
1450 | static void skd_release_skreq(struct skd_device *skdev, |
1451 | struct skd_request_context *skreq) | |
1452 | { | |
e67f86b3 AB |
1453 | /* |
1454 | * Reclaim the skd_request_context | |
1455 | */ | |
1456 | skreq->state = SKD_REQ_STATE_IDLE; | |
f18c17c8 BVA |
1457 | } |
1458 | ||
e67f86b3 AB |
1459 | static int skd_isr_completion_posted(struct skd_device *skdev, |
1460 | int limit, int *enqueued) | |
1461 | { | |
85e34112 BVA |
1462 | struct fit_completion_entry_v1 *skcmp; |
1463 | struct fit_comp_error_info *skerr; | |
e67f86b3 | 1464 | u16 req_id; |
f18c17c8 | 1465 | u32 tag; |
ca33dd92 | 1466 | u16 hwq = 0; |
f18c17c8 | 1467 | struct request *rq; |
e67f86b3 | 1468 | struct skd_request_context *skreq; |
c830da8c BVA |
1469 | u16 cmp_cntxt; |
1470 | u8 cmp_status; | |
1471 | u8 cmp_cycle; | |
1472 | u32 cmp_bytes; | |
c0b3dda7 | 1473 | int rc = 0; |
e67f86b3 | 1474 | int processed = 0; |
e67f86b3 | 1475 | |
760b48ca BVA |
1476 | lockdep_assert_held(&skdev->lock); |
1477 | ||
e67f86b3 AB |
1478 | for (;; ) { |
1479 | SKD_ASSERT(skdev->skcomp_ix < SKD_N_COMPLETION_ENTRY); | |
1480 | ||
1481 | skcmp = &skdev->skcomp_table[skdev->skcomp_ix]; | |
1482 | cmp_cycle = skcmp->cycle; | |
1483 | cmp_cntxt = skcmp->tag; | |
1484 | cmp_status = skcmp->status; | |
1485 | cmp_bytes = be32_to_cpu(skcmp->num_returned_bytes); | |
1486 | ||
1487 | skerr = &skdev->skerr_table[skdev->skcomp_ix]; | |
1488 | ||
f98806d6 BVA |
1489 | dev_dbg(&skdev->pdev->dev, |
1490 | "cycle=%d ix=%d got cycle=%d cmdctxt=0x%x stat=%d busy=%d rbytes=0x%x proto=%d\n", | |
1491 | skdev->skcomp_cycle, skdev->skcomp_ix, cmp_cycle, | |
d4d0f5fc | 1492 | cmp_cntxt, cmp_status, skd_in_flight(skdev), |
6fbb2de5 | 1493 | cmp_bytes, skdev->proto_ver); |
e67f86b3 AB |
1494 | |
1495 | if (cmp_cycle != skdev->skcomp_cycle) { | |
f98806d6 | 1496 | dev_dbg(&skdev->pdev->dev, "end of completions\n"); |
e67f86b3 AB |
1497 | break; |
1498 | } | |
1499 | /* | |
1500 | * Update the completion queue head index and possibly | |
1501 | * the completion cycle count. 8-bit wrap-around. | |
1502 | */ | |
1503 | skdev->skcomp_ix++; | |
1504 | if (skdev->skcomp_ix >= SKD_N_COMPLETION_ENTRY) { | |
1505 | skdev->skcomp_ix = 0; | |
1506 | skdev->skcomp_cycle++; | |
1507 | } | |
1508 | ||
1509 | /* | |
1510 | * The command context is a unique 32-bit ID. The low order | |
1511 | * bits help locate the request. The request is usually a | |
1512 | * r/w request (see skd_start() above) or a special request. | |
1513 | */ | |
1514 | req_id = cmp_cntxt; | |
f18c17c8 | 1515 | tag = req_id & SKD_ID_SLOT_AND_TABLE_MASK; |
e67f86b3 AB |
1516 | |
1517 | /* Is this other than a r/w request? */ | |
f18c17c8 | 1518 | if (tag >= skdev->num_req_context) { |
e67f86b3 AB |
1519 | /* |
1520 | * This is not a completion for a r/w request. | |
1521 | */ | |
ca33dd92 BVA |
1522 | WARN_ON_ONCE(blk_mq_tag_to_rq(skdev->tag_set.tags[hwq], |
1523 | tag)); | |
e67f86b3 AB |
1524 | skd_complete_other(skdev, skcmp, skerr); |
1525 | continue; | |
1526 | } | |
1527 | ||
ca33dd92 | 1528 | rq = blk_mq_tag_to_rq(skdev->tag_set.tags[hwq], tag); |
f18c17c8 BVA |
1529 | if (WARN(!rq, "No request for tag %#x -> %#x\n", cmp_cntxt, |
1530 | tag)) | |
1531 | continue; | |
e7278a8b | 1532 | skreq = blk_mq_rq_to_pdu(rq); |
e67f86b3 AB |
1533 | |
1534 | /* | |
1535 | * Make sure the request ID for the slot matches. | |
1536 | */ | |
1537 | if (skreq->id != req_id) { | |
49f16e2f BVA |
1538 | dev_err(&skdev->pdev->dev, |
1539 | "Completion mismatch comp_id=0x%04x skreq=0x%04x new=0x%04x\n", | |
1540 | req_id, skreq->id, cmp_cntxt); | |
e67f86b3 | 1541 | |
49f16e2f | 1542 | continue; |
e67f86b3 AB |
1543 | } |
1544 | ||
1545 | SKD_ASSERT(skreq->state == SKD_REQ_STATE_BUSY); | |
1546 | ||
e67f86b3 AB |
1547 | skreq->completion = *skcmp; |
1548 | if (unlikely(cmp_status == SAM_STAT_CHECK_CONDITION)) { | |
1549 | skreq->err_info = *skerr; | |
1550 | skd_log_check_status(skdev, cmp_status, skerr->key, | |
1551 | skerr->code, skerr->qual, | |
1552 | skerr->fruc); | |
1553 | } | |
1554 | /* Release DMA resources for the request. */ | |
1555 | if (skreq->n_sg > 0) | |
1556 | skd_postop_sg_list(skdev, skreq); | |
1557 | ||
f18c17c8 | 1558 | skd_release_skreq(skdev, skreq); |
e67f86b3 AB |
1559 | |
1560 | /* | |
f18c17c8 | 1561 | * Capture the outcome and post it back to the native request. |
e67f86b3 | 1562 | */ |
795bc1b5 BVA |
1563 | if (likely(cmp_status == SAM_STAT_GOOD)) { |
1564 | skreq->status = BLK_STS_OK; | |
1565 | blk_mq_complete_request(rq); | |
1566 | } else { | |
f18c17c8 | 1567 | skd_resolve_req_exception(skdev, skreq, rq); |
795bc1b5 | 1568 | } |
e67f86b3 AB |
1569 | |
1570 | /* skd_isr_comp_limit equal zero means no limit */ | |
1571 | if (limit) { | |
1572 | if (++processed >= limit) { | |
1573 | rc = 1; | |
1574 | break; | |
1575 | } | |
1576 | } | |
1577 | } | |
1578 | ||
6fbb2de5 | 1579 | if (skdev->state == SKD_DRVR_STATE_PAUSING && |
d4d0f5fc | 1580 | skd_in_flight(skdev) == 0) { |
e67f86b3 AB |
1581 | skdev->state = SKD_DRVR_STATE_PAUSED; |
1582 | wake_up_interruptible(&skdev->waitq); | |
1583 | } | |
1584 | ||
1585 | return rc; | |
1586 | } | |
1587 | ||
1588 | static void skd_complete_other(struct skd_device *skdev, | |
85e34112 BVA |
1589 | struct fit_completion_entry_v1 *skcomp, |
1590 | struct fit_comp_error_info *skerr) | |
e67f86b3 AB |
1591 | { |
1592 | u32 req_id = 0; | |
1593 | u32 req_table; | |
1594 | u32 req_slot; | |
1595 | struct skd_special_context *skspcl; | |
1596 | ||
760b48ca BVA |
1597 | lockdep_assert_held(&skdev->lock); |
1598 | ||
e67f86b3 AB |
1599 | req_id = skcomp->tag; |
1600 | req_table = req_id & SKD_ID_TABLE_MASK; | |
1601 | req_slot = req_id & SKD_ID_SLOT_MASK; | |
1602 | ||
f98806d6 BVA |
1603 | dev_dbg(&skdev->pdev->dev, "table=0x%x id=0x%x slot=%d\n", req_table, |
1604 | req_id, req_slot); | |
e67f86b3 AB |
1605 | |
1606 | /* | |
1607 | * Based on the request id, determine how to dispatch this completion. | |
1608 | * This swich/case is finding the good cases and forwarding the | |
1609 | * completion entry. Errors are reported below the switch. | |
1610 | */ | |
1611 | switch (req_table) { | |
1612 | case SKD_ID_RW_REQUEST: | |
1613 | /* | |
e1d06f2d | 1614 | * The caller, skd_isr_completion_posted() above, |
e67f86b3 AB |
1615 | * handles r/w requests. The only way we get here |
1616 | * is if the req_slot is out of bounds. | |
1617 | */ | |
1618 | break; | |
1619 | ||
e67f86b3 AB |
1620 | case SKD_ID_INTERNAL: |
1621 | if (req_slot == 0) { | |
1622 | skspcl = &skdev->internal_skspcl; | |
1623 | if (skspcl->req.id == req_id && | |
1624 | skspcl->req.state == SKD_REQ_STATE_BUSY) { | |
1625 | skd_complete_internal(skdev, | |
1626 | skcomp, skerr, skspcl); | |
1627 | return; | |
1628 | } | |
1629 | } | |
1630 | break; | |
1631 | ||
1632 | case SKD_ID_FIT_MSG: | |
1633 | /* | |
1634 | * These id's should never appear in a completion record. | |
1635 | */ | |
1636 | break; | |
1637 | ||
1638 | default: | |
1639 | /* | |
1640 | * These id's should never appear anywhere; | |
1641 | */ | |
1642 | break; | |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * If we get here it is a bad or stale id. | |
1647 | */ | |
1648 | } | |
1649 | ||
e67f86b3 AB |
1650 | static void skd_reset_skcomp(struct skd_device *skdev) |
1651 | { | |
6f7c7675 | 1652 | memset(skdev->skcomp_table, 0, SKD_SKCOMP_SIZE); |
e67f86b3 AB |
1653 | |
1654 | skdev->skcomp_ix = 0; | |
1655 | skdev->skcomp_cycle = 1; | |
1656 | } | |
1657 | ||
1658 | /* | |
1659 | ***************************************************************************** | |
1660 | * INTERRUPTS | |
1661 | ***************************************************************************** | |
1662 | */ | |
1663 | static void skd_completion_worker(struct work_struct *work) | |
1664 | { | |
1665 | struct skd_device *skdev = | |
1666 | container_of(work, struct skd_device, completion_worker); | |
1667 | unsigned long flags; | |
1668 | int flush_enqueued = 0; | |
1669 | ||
1670 | spin_lock_irqsave(&skdev->lock, flags); | |
1671 | ||
1672 | /* | |
1673 | * pass in limit=0, which means no limit.. | |
1674 | * process everything in compq | |
1675 | */ | |
1676 | skd_isr_completion_posted(skdev, 0, &flush_enqueued); | |
ca33dd92 | 1677 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
1678 | |
1679 | spin_unlock_irqrestore(&skdev->lock, flags); | |
1680 | } | |
1681 | ||
1682 | static void skd_isr_msg_from_dev(struct skd_device *skdev); | |
1683 | ||
41c9499b AB |
1684 | static irqreturn_t |
1685 | skd_isr(int irq, void *ptr) | |
e67f86b3 | 1686 | { |
1cd3c1ab | 1687 | struct skd_device *skdev = ptr; |
e67f86b3 AB |
1688 | u32 intstat; |
1689 | u32 ack; | |
1690 | int rc = 0; | |
1691 | int deferred = 0; | |
1692 | int flush_enqueued = 0; | |
1693 | ||
e67f86b3 AB |
1694 | spin_lock(&skdev->lock); |
1695 | ||
1696 | for (;; ) { | |
1697 | intstat = SKD_READL(skdev, FIT_INT_STATUS_HOST); | |
1698 | ||
1699 | ack = FIT_INT_DEF_MASK; | |
1700 | ack &= intstat; | |
1701 | ||
f98806d6 BVA |
1702 | dev_dbg(&skdev->pdev->dev, "intstat=0x%x ack=0x%x\n", intstat, |
1703 | ack); | |
e67f86b3 AB |
1704 | |
1705 | /* As long as there is an int pending on device, keep | |
1706 | * running loop. When none, get out, but if we've never | |
1707 | * done any processing, call completion handler? | |
1708 | */ | |
1709 | if (ack == 0) { | |
1710 | /* No interrupts on device, but run the completion | |
1711 | * processor anyway? | |
1712 | */ | |
1713 | if (rc == 0) | |
1714 | if (likely (skdev->state | |
1715 | == SKD_DRVR_STATE_ONLINE)) | |
1716 | deferred = 1; | |
1717 | break; | |
1718 | } | |
1719 | ||
1720 | rc = IRQ_HANDLED; | |
1721 | ||
1722 | SKD_WRITEL(skdev, ack, FIT_INT_STATUS_HOST); | |
1723 | ||
1724 | if (likely((skdev->state != SKD_DRVR_STATE_LOAD) && | |
1725 | (skdev->state != SKD_DRVR_STATE_STOPPING))) { | |
1726 | if (intstat & FIT_ISH_COMPLETION_POSTED) { | |
1727 | /* | |
1728 | * If we have already deferred completion | |
1729 | * processing, don't bother running it again | |
1730 | */ | |
1731 | if (deferred == 0) | |
1732 | deferred = | |
1733 | skd_isr_completion_posted(skdev, | |
1734 | skd_isr_comp_limit, &flush_enqueued); | |
1735 | } | |
1736 | ||
1737 | if (intstat & FIT_ISH_FW_STATE_CHANGE) { | |
1738 | skd_isr_fwstate(skdev); | |
1739 | if (skdev->state == SKD_DRVR_STATE_FAULT || | |
1740 | skdev->state == | |
1741 | SKD_DRVR_STATE_DISAPPEARED) { | |
1742 | spin_unlock(&skdev->lock); | |
1743 | return rc; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | if (intstat & FIT_ISH_MSG_FROM_DEV) | |
1748 | skd_isr_msg_from_dev(skdev); | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | if (unlikely(flush_enqueued)) | |
ca33dd92 | 1753 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
1754 | |
1755 | if (deferred) | |
1756 | schedule_work(&skdev->completion_worker); | |
1757 | else if (!flush_enqueued) | |
ca33dd92 | 1758 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
1759 | |
1760 | spin_unlock(&skdev->lock); | |
1761 | ||
1762 | return rc; | |
1763 | } | |
1764 | ||
e67f86b3 AB |
1765 | static void skd_drive_fault(struct skd_device *skdev) |
1766 | { | |
1767 | skdev->state = SKD_DRVR_STATE_FAULT; | |
f98806d6 | 1768 | dev_err(&skdev->pdev->dev, "Drive FAULT\n"); |
e67f86b3 AB |
1769 | } |
1770 | ||
1771 | static void skd_drive_disappeared(struct skd_device *skdev) | |
1772 | { | |
1773 | skdev->state = SKD_DRVR_STATE_DISAPPEARED; | |
f98806d6 | 1774 | dev_err(&skdev->pdev->dev, "Drive DISAPPEARED\n"); |
e67f86b3 AB |
1775 | } |
1776 | ||
1777 | static void skd_isr_fwstate(struct skd_device *skdev) | |
1778 | { | |
1779 | u32 sense; | |
1780 | u32 state; | |
1781 | u32 mtd; | |
1782 | int prev_driver_state = skdev->state; | |
1783 | ||
1784 | sense = SKD_READL(skdev, FIT_STATUS); | |
1785 | state = sense & FIT_SR_DRIVE_STATE_MASK; | |
1786 | ||
f98806d6 BVA |
1787 | dev_err(&skdev->pdev->dev, "s1120 state %s(%d)=>%s(%d)\n", |
1788 | skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, | |
1789 | skd_drive_state_to_str(state), state); | |
e67f86b3 AB |
1790 | |
1791 | skdev->drive_state = state; | |
1792 | ||
1793 | switch (skdev->drive_state) { | |
1794 | case FIT_SR_DRIVE_INIT: | |
1795 | if (skdev->state == SKD_DRVR_STATE_PROTOCOL_MISMATCH) { | |
1796 | skd_disable_interrupts(skdev); | |
1797 | break; | |
1798 | } | |
1799 | if (skdev->state == SKD_DRVR_STATE_RESTARTING) | |
79ce12a8 | 1800 | skd_recover_requests(skdev); |
e67f86b3 AB |
1801 | if (skdev->state == SKD_DRVR_STATE_WAIT_BOOT) { |
1802 | skdev->timer_countdown = SKD_STARTING_TIMO; | |
1803 | skdev->state = SKD_DRVR_STATE_STARTING; | |
1804 | skd_soft_reset(skdev); | |
1805 | break; | |
1806 | } | |
1807 | mtd = FIT_MXD_CONS(FIT_MTD_FITFW_INIT, 0, 0); | |
1808 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
1809 | skdev->last_mtd = mtd; | |
1810 | break; | |
1811 | ||
1812 | case FIT_SR_DRIVE_ONLINE: | |
1813 | skdev->cur_max_queue_depth = skd_max_queue_depth; | |
1814 | if (skdev->cur_max_queue_depth > skdev->dev_max_queue_depth) | |
1815 | skdev->cur_max_queue_depth = skdev->dev_max_queue_depth; | |
1816 | ||
1817 | skdev->queue_low_water_mark = | |
1818 | skdev->cur_max_queue_depth * 2 / 3 + 1; | |
1819 | if (skdev->queue_low_water_mark < 1) | |
1820 | skdev->queue_low_water_mark = 1; | |
f98806d6 BVA |
1821 | dev_info(&skdev->pdev->dev, |
1822 | "Queue depth limit=%d dev=%d lowat=%d\n", | |
1823 | skdev->cur_max_queue_depth, | |
1824 | skdev->dev_max_queue_depth, | |
1825 | skdev->queue_low_water_mark); | |
e67f86b3 AB |
1826 | |
1827 | skd_refresh_device_data(skdev); | |
1828 | break; | |
1829 | ||
1830 | case FIT_SR_DRIVE_BUSY: | |
1831 | skdev->state = SKD_DRVR_STATE_BUSY; | |
1832 | skdev->timer_countdown = SKD_BUSY_TIMO; | |
1833 | skd_quiesce_dev(skdev); | |
1834 | break; | |
1835 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
1836 | /* set timer for 3 seconds, we'll abort any unfinished | |
1837 | * commands after that expires | |
1838 | */ | |
1839 | skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; | |
1840 | skdev->timer_countdown = SKD_TIMER_SECONDS(3); | |
ca33dd92 | 1841 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
1842 | break; |
1843 | case FIT_SR_DRIVE_BUSY_ERASE: | |
1844 | skdev->state = SKD_DRVR_STATE_BUSY_ERASE; | |
1845 | skdev->timer_countdown = SKD_BUSY_TIMO; | |
1846 | break; | |
1847 | case FIT_SR_DRIVE_OFFLINE: | |
1848 | skdev->state = SKD_DRVR_STATE_IDLE; | |
1849 | break; | |
1850 | case FIT_SR_DRIVE_SOFT_RESET: | |
1851 | switch (skdev->state) { | |
1852 | case SKD_DRVR_STATE_STARTING: | |
1853 | case SKD_DRVR_STATE_RESTARTING: | |
1854 | /* Expected by a caller of skd_soft_reset() */ | |
1855 | break; | |
1856 | default: | |
1857 | skdev->state = SKD_DRVR_STATE_RESTARTING; | |
1858 | break; | |
1859 | } | |
1860 | break; | |
1861 | case FIT_SR_DRIVE_FW_BOOTING: | |
f98806d6 | 1862 | dev_dbg(&skdev->pdev->dev, "ISR FIT_SR_DRIVE_FW_BOOTING\n"); |
e67f86b3 AB |
1863 | skdev->state = SKD_DRVR_STATE_WAIT_BOOT; |
1864 | skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; | |
1865 | break; | |
1866 | ||
1867 | case FIT_SR_DRIVE_DEGRADED: | |
1868 | case FIT_SR_PCIE_LINK_DOWN: | |
1869 | case FIT_SR_DRIVE_NEED_FW_DOWNLOAD: | |
1870 | break; | |
1871 | ||
1872 | case FIT_SR_DRIVE_FAULT: | |
1873 | skd_drive_fault(skdev); | |
79ce12a8 | 1874 | skd_recover_requests(skdev); |
ca33dd92 | 1875 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
1876 | break; |
1877 | ||
1878 | /* PCIe bus returned all Fs? */ | |
1879 | case 0xFF: | |
f98806d6 BVA |
1880 | dev_info(&skdev->pdev->dev, "state=0x%x sense=0x%x\n", state, |
1881 | sense); | |
e67f86b3 | 1882 | skd_drive_disappeared(skdev); |
79ce12a8 | 1883 | skd_recover_requests(skdev); |
ca33dd92 | 1884 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
1885 | break; |
1886 | default: | |
1887 | /* | |
1888 | * Uknown FW State. Wait for a state we recognize. | |
1889 | */ | |
1890 | break; | |
1891 | } | |
f98806d6 BVA |
1892 | dev_err(&skdev->pdev->dev, "Driver state %s(%d)=>%s(%d)\n", |
1893 | skd_skdev_state_to_str(prev_driver_state), prev_driver_state, | |
1894 | skd_skdev_state_to_str(skdev->state), skdev->state); | |
e67f86b3 AB |
1895 | } |
1896 | ||
7baa8572 | 1897 | static bool skd_recover_request(struct request *req, void *data, bool reserved) |
e67f86b3 | 1898 | { |
ca33dd92 BVA |
1899 | struct skd_device *const skdev = data; |
1900 | struct skd_request_context *skreq = blk_mq_rq_to_pdu(req); | |
e67f86b3 | 1901 | |
4e54b849 | 1902 | if (skreq->state != SKD_REQ_STATE_BUSY) |
7baa8572 | 1903 | return true; |
e67f86b3 | 1904 | |
4e54b849 | 1905 | skd_log_skreq(skdev, skreq, "recover"); |
e67f86b3 | 1906 | |
4e54b849 BVA |
1907 | /* Release DMA resources for the request. */ |
1908 | if (skreq->n_sg > 0) | |
1909 | skd_postop_sg_list(skdev, skreq); | |
e67f86b3 | 1910 | |
4e54b849 | 1911 | skreq->state = SKD_REQ_STATE_IDLE; |
795bc1b5 BVA |
1912 | skreq->status = BLK_STS_IOERR; |
1913 | blk_mq_complete_request(req); | |
7baa8572 | 1914 | return true; |
4e54b849 | 1915 | } |
e67f86b3 | 1916 | |
4e54b849 BVA |
1917 | static void skd_recover_requests(struct skd_device *skdev) |
1918 | { | |
ca33dd92 | 1919 | blk_mq_tagset_busy_iter(&skdev->tag_set, skd_recover_request, skdev); |
e67f86b3 AB |
1920 | } |
1921 | ||
1922 | static void skd_isr_msg_from_dev(struct skd_device *skdev) | |
1923 | { | |
1924 | u32 mfd; | |
1925 | u32 mtd; | |
1926 | u32 data; | |
1927 | ||
1928 | mfd = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); | |
1929 | ||
f98806d6 BVA |
1930 | dev_dbg(&skdev->pdev->dev, "mfd=0x%x last_mtd=0x%x\n", mfd, |
1931 | skdev->last_mtd); | |
e67f86b3 AB |
1932 | |
1933 | /* ignore any mtd that is an ack for something we didn't send */ | |
1934 | if (FIT_MXD_TYPE(mfd) != FIT_MXD_TYPE(skdev->last_mtd)) | |
1935 | return; | |
1936 | ||
1937 | switch (FIT_MXD_TYPE(mfd)) { | |
1938 | case FIT_MTD_FITFW_INIT: | |
1939 | skdev->proto_ver = FIT_PROTOCOL_MAJOR_VER(mfd); | |
1940 | ||
1941 | if (skdev->proto_ver != FIT_PROTOCOL_VERSION_1) { | |
f98806d6 BVA |
1942 | dev_err(&skdev->pdev->dev, "protocol mismatch\n"); |
1943 | dev_err(&skdev->pdev->dev, " got=%d support=%d\n", | |
1944 | skdev->proto_ver, FIT_PROTOCOL_VERSION_1); | |
1945 | dev_err(&skdev->pdev->dev, " please upgrade driver\n"); | |
e67f86b3 AB |
1946 | skdev->state = SKD_DRVR_STATE_PROTOCOL_MISMATCH; |
1947 | skd_soft_reset(skdev); | |
1948 | break; | |
1949 | } | |
1950 | mtd = FIT_MXD_CONS(FIT_MTD_GET_CMDQ_DEPTH, 0, 0); | |
1951 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
1952 | skdev->last_mtd = mtd; | |
1953 | break; | |
1954 | ||
1955 | case FIT_MTD_GET_CMDQ_DEPTH: | |
1956 | skdev->dev_max_queue_depth = FIT_MXD_DATA(mfd); | |
1957 | mtd = FIT_MXD_CONS(FIT_MTD_SET_COMPQ_DEPTH, 0, | |
1958 | SKD_N_COMPLETION_ENTRY); | |
1959 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
1960 | skdev->last_mtd = mtd; | |
1961 | break; | |
1962 | ||
1963 | case FIT_MTD_SET_COMPQ_DEPTH: | |
1964 | SKD_WRITEQ(skdev, skdev->cq_dma_address, FIT_MSG_TO_DEVICE_ARG); | |
1965 | mtd = FIT_MXD_CONS(FIT_MTD_SET_COMPQ_ADDR, 0, 0); | |
1966 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
1967 | skdev->last_mtd = mtd; | |
1968 | break; | |
1969 | ||
1970 | case FIT_MTD_SET_COMPQ_ADDR: | |
1971 | skd_reset_skcomp(skdev); | |
1972 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_HOST_ID, 0, skdev->devno); | |
1973 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
1974 | skdev->last_mtd = mtd; | |
1975 | break; | |
1976 | ||
1977 | case FIT_MTD_CMD_LOG_HOST_ID: | |
474f5da2 AB |
1978 | /* hardware interface overflows in y2106 */ |
1979 | skdev->connect_time_stamp = (u32)ktime_get_real_seconds(); | |
e67f86b3 AB |
1980 | data = skdev->connect_time_stamp & 0xFFFF; |
1981 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_LO, 0, data); | |
1982 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
1983 | skdev->last_mtd = mtd; | |
1984 | break; | |
1985 | ||
1986 | case FIT_MTD_CMD_LOG_TIME_STAMP_LO: | |
1987 | skdev->drive_jiffies = FIT_MXD_DATA(mfd); | |
1988 | data = (skdev->connect_time_stamp >> 16) & 0xFFFF; | |
1989 | mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_HI, 0, data); | |
1990 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
1991 | skdev->last_mtd = mtd; | |
1992 | break; | |
1993 | ||
1994 | case FIT_MTD_CMD_LOG_TIME_STAMP_HI: | |
1995 | skdev->drive_jiffies |= (FIT_MXD_DATA(mfd) << 16); | |
1996 | mtd = FIT_MXD_CONS(FIT_MTD_ARM_QUEUE, 0, 0); | |
1997 | SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); | |
1998 | skdev->last_mtd = mtd; | |
1999 | ||
f98806d6 BVA |
2000 | dev_err(&skdev->pdev->dev, "Time sync driver=0x%x device=0x%x\n", |
2001 | skdev->connect_time_stamp, skdev->drive_jiffies); | |
e67f86b3 AB |
2002 | break; |
2003 | ||
2004 | case FIT_MTD_ARM_QUEUE: | |
2005 | skdev->last_mtd = 0; | |
2006 | /* | |
2007 | * State should be, or soon will be, FIT_SR_DRIVE_ONLINE. | |
2008 | */ | |
2009 | break; | |
2010 | ||
2011 | default: | |
2012 | break; | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | static void skd_disable_interrupts(struct skd_device *skdev) | |
2017 | { | |
2018 | u32 sense; | |
2019 | ||
2020 | sense = SKD_READL(skdev, FIT_CONTROL); | |
2021 | sense &= ~FIT_CR_ENABLE_INTERRUPTS; | |
2022 | SKD_WRITEL(skdev, sense, FIT_CONTROL); | |
f98806d6 | 2023 | dev_dbg(&skdev->pdev->dev, "sense 0x%x\n", sense); |
e67f86b3 AB |
2024 | |
2025 | /* Note that the 1s is written. A 1-bit means | |
2026 | * disable, a 0 means enable. | |
2027 | */ | |
2028 | SKD_WRITEL(skdev, ~0, FIT_INT_MASK_HOST); | |
2029 | } | |
2030 | ||
2031 | static void skd_enable_interrupts(struct skd_device *skdev) | |
2032 | { | |
2033 | u32 val; | |
2034 | ||
2035 | /* unmask interrupts first */ | |
2036 | val = FIT_ISH_FW_STATE_CHANGE + | |
2037 | FIT_ISH_COMPLETION_POSTED + FIT_ISH_MSG_FROM_DEV; | |
2038 | ||
2039 | /* Note that the compliment of mask is written. A 1-bit means | |
2040 | * disable, a 0 means enable. */ | |
2041 | SKD_WRITEL(skdev, ~val, FIT_INT_MASK_HOST); | |
f98806d6 | 2042 | dev_dbg(&skdev->pdev->dev, "interrupt mask=0x%x\n", ~val); |
e67f86b3 AB |
2043 | |
2044 | val = SKD_READL(skdev, FIT_CONTROL); | |
2045 | val |= FIT_CR_ENABLE_INTERRUPTS; | |
f98806d6 | 2046 | dev_dbg(&skdev->pdev->dev, "control=0x%x\n", val); |
e67f86b3 AB |
2047 | SKD_WRITEL(skdev, val, FIT_CONTROL); |
2048 | } | |
2049 | ||
2050 | /* | |
2051 | ***************************************************************************** | |
2052 | * START, STOP, RESTART, QUIESCE, UNQUIESCE | |
2053 | ***************************************************************************** | |
2054 | */ | |
2055 | ||
2056 | static void skd_soft_reset(struct skd_device *skdev) | |
2057 | { | |
2058 | u32 val; | |
2059 | ||
2060 | val = SKD_READL(skdev, FIT_CONTROL); | |
2061 | val |= (FIT_CR_SOFT_RESET); | |
f98806d6 | 2062 | dev_dbg(&skdev->pdev->dev, "control=0x%x\n", val); |
e67f86b3 AB |
2063 | SKD_WRITEL(skdev, val, FIT_CONTROL); |
2064 | } | |
2065 | ||
2066 | static void skd_start_device(struct skd_device *skdev) | |
2067 | { | |
2068 | unsigned long flags; | |
2069 | u32 sense; | |
2070 | u32 state; | |
2071 | ||
2072 | spin_lock_irqsave(&skdev->lock, flags); | |
2073 | ||
2074 | /* ack all ghost interrupts */ | |
2075 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
2076 | ||
2077 | sense = SKD_READL(skdev, FIT_STATUS); | |
2078 | ||
f98806d6 | 2079 | dev_dbg(&skdev->pdev->dev, "initial status=0x%x\n", sense); |
e67f86b3 AB |
2080 | |
2081 | state = sense & FIT_SR_DRIVE_STATE_MASK; | |
2082 | skdev->drive_state = state; | |
2083 | skdev->last_mtd = 0; | |
2084 | ||
2085 | skdev->state = SKD_DRVR_STATE_STARTING; | |
2086 | skdev->timer_countdown = SKD_STARTING_TIMO; | |
2087 | ||
2088 | skd_enable_interrupts(skdev); | |
2089 | ||
2090 | switch (skdev->drive_state) { | |
2091 | case FIT_SR_DRIVE_OFFLINE: | |
f98806d6 | 2092 | dev_err(&skdev->pdev->dev, "Drive offline...\n"); |
e67f86b3 AB |
2093 | break; |
2094 | ||
2095 | case FIT_SR_DRIVE_FW_BOOTING: | |
f98806d6 | 2096 | dev_dbg(&skdev->pdev->dev, "FIT_SR_DRIVE_FW_BOOTING\n"); |
e67f86b3 AB |
2097 | skdev->state = SKD_DRVR_STATE_WAIT_BOOT; |
2098 | skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; | |
2099 | break; | |
2100 | ||
2101 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
f98806d6 | 2102 | dev_info(&skdev->pdev->dev, "Start: BUSY_SANITIZE\n"); |
e67f86b3 AB |
2103 | skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; |
2104 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
2105 | break; | |
2106 | ||
2107 | case FIT_SR_DRIVE_BUSY_ERASE: | |
f98806d6 | 2108 | dev_info(&skdev->pdev->dev, "Start: BUSY_ERASE\n"); |
e67f86b3 AB |
2109 | skdev->state = SKD_DRVR_STATE_BUSY_ERASE; |
2110 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
2111 | break; | |
2112 | ||
2113 | case FIT_SR_DRIVE_INIT: | |
2114 | case FIT_SR_DRIVE_ONLINE: | |
2115 | skd_soft_reset(skdev); | |
2116 | break; | |
2117 | ||
2118 | case FIT_SR_DRIVE_BUSY: | |
f98806d6 | 2119 | dev_err(&skdev->pdev->dev, "Drive Busy...\n"); |
e67f86b3 AB |
2120 | skdev->state = SKD_DRVR_STATE_BUSY; |
2121 | skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; | |
2122 | break; | |
2123 | ||
2124 | case FIT_SR_DRIVE_SOFT_RESET: | |
f98806d6 | 2125 | dev_err(&skdev->pdev->dev, "drive soft reset in prog\n"); |
e67f86b3 AB |
2126 | break; |
2127 | ||
2128 | case FIT_SR_DRIVE_FAULT: | |
2129 | /* Fault state is bad...soft reset won't do it... | |
2130 | * Hard reset, maybe, but does it work on device? | |
2131 | * For now, just fault so the system doesn't hang. | |
2132 | */ | |
2133 | skd_drive_fault(skdev); | |
2134 | /*start the queue so we can respond with error to requests */ | |
f98806d6 | 2135 | dev_dbg(&skdev->pdev->dev, "starting queue\n"); |
ca33dd92 | 2136 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
2137 | skdev->gendisk_on = -1; |
2138 | wake_up_interruptible(&skdev->waitq); | |
2139 | break; | |
2140 | ||
2141 | case 0xFF: | |
2142 | /* Most likely the device isn't there or isn't responding | |
2143 | * to the BAR1 addresses. */ | |
2144 | skd_drive_disappeared(skdev); | |
2145 | /*start the queue so we can respond with error to requests */ | |
f98806d6 BVA |
2146 | dev_dbg(&skdev->pdev->dev, |
2147 | "starting queue to error-out reqs\n"); | |
ca33dd92 | 2148 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
2149 | skdev->gendisk_on = -1; |
2150 | wake_up_interruptible(&skdev->waitq); | |
2151 | break; | |
2152 | ||
2153 | default: | |
f98806d6 BVA |
2154 | dev_err(&skdev->pdev->dev, "Start: unknown state %x\n", |
2155 | skdev->drive_state); | |
e67f86b3 AB |
2156 | break; |
2157 | } | |
2158 | ||
2159 | state = SKD_READL(skdev, FIT_CONTROL); | |
f98806d6 | 2160 | dev_dbg(&skdev->pdev->dev, "FIT Control Status=0x%x\n", state); |
e67f86b3 AB |
2161 | |
2162 | state = SKD_READL(skdev, FIT_INT_STATUS_HOST); | |
f98806d6 | 2163 | dev_dbg(&skdev->pdev->dev, "Intr Status=0x%x\n", state); |
e67f86b3 AB |
2164 | |
2165 | state = SKD_READL(skdev, FIT_INT_MASK_HOST); | |
f98806d6 | 2166 | dev_dbg(&skdev->pdev->dev, "Intr Mask=0x%x\n", state); |
e67f86b3 AB |
2167 | |
2168 | state = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); | |
f98806d6 | 2169 | dev_dbg(&skdev->pdev->dev, "Msg from Dev=0x%x\n", state); |
e67f86b3 AB |
2170 | |
2171 | state = SKD_READL(skdev, FIT_HW_VERSION); | |
f98806d6 | 2172 | dev_dbg(&skdev->pdev->dev, "HW version=0x%x\n", state); |
e67f86b3 AB |
2173 | |
2174 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2175 | } | |
2176 | ||
2177 | static void skd_stop_device(struct skd_device *skdev) | |
2178 | { | |
2179 | unsigned long flags; | |
2180 | struct skd_special_context *skspcl = &skdev->internal_skspcl; | |
2181 | u32 dev_state; | |
2182 | int i; | |
2183 | ||
2184 | spin_lock_irqsave(&skdev->lock, flags); | |
2185 | ||
2186 | if (skdev->state != SKD_DRVR_STATE_ONLINE) { | |
f98806d6 | 2187 | dev_err(&skdev->pdev->dev, "%s not online no sync\n", __func__); |
e67f86b3 AB |
2188 | goto stop_out; |
2189 | } | |
2190 | ||
2191 | if (skspcl->req.state != SKD_REQ_STATE_IDLE) { | |
f98806d6 | 2192 | dev_err(&skdev->pdev->dev, "%s no special\n", __func__); |
e67f86b3 AB |
2193 | goto stop_out; |
2194 | } | |
2195 | ||
2196 | skdev->state = SKD_DRVR_STATE_SYNCING; | |
2197 | skdev->sync_done = 0; | |
2198 | ||
2199 | skd_send_internal_skspcl(skdev, skspcl, SYNCHRONIZE_CACHE); | |
2200 | ||
2201 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2202 | ||
2203 | wait_event_interruptible_timeout(skdev->waitq, | |
2204 | (skdev->sync_done), (10 * HZ)); | |
2205 | ||
2206 | spin_lock_irqsave(&skdev->lock, flags); | |
2207 | ||
2208 | switch (skdev->sync_done) { | |
2209 | case 0: | |
f98806d6 | 2210 | dev_err(&skdev->pdev->dev, "%s no sync\n", __func__); |
e67f86b3 AB |
2211 | break; |
2212 | case 1: | |
f98806d6 | 2213 | dev_err(&skdev->pdev->dev, "%s sync done\n", __func__); |
e67f86b3 AB |
2214 | break; |
2215 | default: | |
f98806d6 | 2216 | dev_err(&skdev->pdev->dev, "%s sync error\n", __func__); |
e67f86b3 AB |
2217 | } |
2218 | ||
2219 | stop_out: | |
2220 | skdev->state = SKD_DRVR_STATE_STOPPING; | |
2221 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2222 | ||
2223 | skd_kill_timer(skdev); | |
2224 | ||
2225 | spin_lock_irqsave(&skdev->lock, flags); | |
2226 | skd_disable_interrupts(skdev); | |
2227 | ||
2228 | /* ensure all ints on device are cleared */ | |
2229 | /* soft reset the device to unload with a clean slate */ | |
2230 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
2231 | SKD_WRITEL(skdev, FIT_CR_SOFT_RESET, FIT_CONTROL); | |
2232 | ||
2233 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2234 | ||
2235 | /* poll every 100ms, 1 second timeout */ | |
2236 | for (i = 0; i < 10; i++) { | |
2237 | dev_state = | |
2238 | SKD_READL(skdev, FIT_STATUS) & FIT_SR_DRIVE_STATE_MASK; | |
2239 | if (dev_state == FIT_SR_DRIVE_INIT) | |
2240 | break; | |
2241 | set_current_state(TASK_INTERRUPTIBLE); | |
2242 | schedule_timeout(msecs_to_jiffies(100)); | |
2243 | } | |
2244 | ||
2245 | if (dev_state != FIT_SR_DRIVE_INIT) | |
f98806d6 BVA |
2246 | dev_err(&skdev->pdev->dev, "%s state error 0x%02x\n", __func__, |
2247 | dev_state); | |
e67f86b3 AB |
2248 | } |
2249 | ||
2250 | /* assume spinlock is held */ | |
2251 | static void skd_restart_device(struct skd_device *skdev) | |
2252 | { | |
2253 | u32 state; | |
2254 | ||
2255 | /* ack all ghost interrupts */ | |
2256 | SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); | |
2257 | ||
2258 | state = SKD_READL(skdev, FIT_STATUS); | |
2259 | ||
f98806d6 | 2260 | dev_dbg(&skdev->pdev->dev, "drive status=0x%x\n", state); |
e67f86b3 AB |
2261 | |
2262 | state &= FIT_SR_DRIVE_STATE_MASK; | |
2263 | skdev->drive_state = state; | |
2264 | skdev->last_mtd = 0; | |
2265 | ||
2266 | skdev->state = SKD_DRVR_STATE_RESTARTING; | |
2267 | skdev->timer_countdown = SKD_RESTARTING_TIMO; | |
2268 | ||
2269 | skd_soft_reset(skdev); | |
2270 | } | |
2271 | ||
2272 | /* assume spinlock is held */ | |
2273 | static int skd_quiesce_dev(struct skd_device *skdev) | |
2274 | { | |
2275 | int rc = 0; | |
2276 | ||
2277 | switch (skdev->state) { | |
2278 | case SKD_DRVR_STATE_BUSY: | |
2279 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
f98806d6 | 2280 | dev_dbg(&skdev->pdev->dev, "stopping queue\n"); |
ca33dd92 | 2281 | blk_mq_stop_hw_queues(skdev->queue); |
e67f86b3 AB |
2282 | break; |
2283 | case SKD_DRVR_STATE_ONLINE: | |
2284 | case SKD_DRVR_STATE_STOPPING: | |
2285 | case SKD_DRVR_STATE_SYNCING: | |
2286 | case SKD_DRVR_STATE_PAUSING: | |
2287 | case SKD_DRVR_STATE_PAUSED: | |
2288 | case SKD_DRVR_STATE_STARTING: | |
2289 | case SKD_DRVR_STATE_RESTARTING: | |
2290 | case SKD_DRVR_STATE_RESUMING: | |
2291 | default: | |
2292 | rc = -EINVAL; | |
f98806d6 BVA |
2293 | dev_dbg(&skdev->pdev->dev, "state [%d] not implemented\n", |
2294 | skdev->state); | |
e67f86b3 AB |
2295 | } |
2296 | return rc; | |
2297 | } | |
2298 | ||
2299 | /* assume spinlock is held */ | |
2300 | static int skd_unquiesce_dev(struct skd_device *skdev) | |
2301 | { | |
2302 | int prev_driver_state = skdev->state; | |
2303 | ||
2304 | skd_log_skdev(skdev, "unquiesce"); | |
2305 | if (skdev->state == SKD_DRVR_STATE_ONLINE) { | |
f98806d6 | 2306 | dev_dbg(&skdev->pdev->dev, "**** device already ONLINE\n"); |
e67f86b3 AB |
2307 | return 0; |
2308 | } | |
2309 | if (skdev->drive_state != FIT_SR_DRIVE_ONLINE) { | |
2310 | /* | |
2311 | * If there has been an state change to other than | |
2312 | * ONLINE, we will rely on controller state change | |
2313 | * to come back online and restart the queue. | |
2314 | * The BUSY state means that driver is ready to | |
2315 | * continue normal processing but waiting for controller | |
2316 | * to become available. | |
2317 | */ | |
2318 | skdev->state = SKD_DRVR_STATE_BUSY; | |
f98806d6 | 2319 | dev_dbg(&skdev->pdev->dev, "drive BUSY state\n"); |
e67f86b3 AB |
2320 | return 0; |
2321 | } | |
2322 | ||
2323 | /* | |
2324 | * Drive has just come online, driver is either in startup, | |
2325 | * paused performing a task, or bust waiting for hardware. | |
2326 | */ | |
2327 | switch (skdev->state) { | |
2328 | case SKD_DRVR_STATE_PAUSED: | |
2329 | case SKD_DRVR_STATE_BUSY: | |
2330 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
2331 | case SKD_DRVR_STATE_BUSY_ERASE: | |
2332 | case SKD_DRVR_STATE_STARTING: | |
2333 | case SKD_DRVR_STATE_RESTARTING: | |
2334 | case SKD_DRVR_STATE_FAULT: | |
2335 | case SKD_DRVR_STATE_IDLE: | |
2336 | case SKD_DRVR_STATE_LOAD: | |
2337 | skdev->state = SKD_DRVR_STATE_ONLINE; | |
f98806d6 BVA |
2338 | dev_err(&skdev->pdev->dev, "Driver state %s(%d)=>%s(%d)\n", |
2339 | skd_skdev_state_to_str(prev_driver_state), | |
2340 | prev_driver_state, skd_skdev_state_to_str(skdev->state), | |
2341 | skdev->state); | |
2342 | dev_dbg(&skdev->pdev->dev, | |
2343 | "**** device ONLINE...starting block queue\n"); | |
2344 | dev_dbg(&skdev->pdev->dev, "starting queue\n"); | |
2345 | dev_info(&skdev->pdev->dev, "STEC s1120 ONLINE\n"); | |
ca33dd92 | 2346 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
2347 | skdev->gendisk_on = 1; |
2348 | wake_up_interruptible(&skdev->waitq); | |
2349 | break; | |
2350 | ||
2351 | case SKD_DRVR_STATE_DISAPPEARED: | |
2352 | default: | |
f98806d6 BVA |
2353 | dev_dbg(&skdev->pdev->dev, |
2354 | "**** driver state %d, not implemented\n", | |
2355 | skdev->state); | |
e67f86b3 AB |
2356 | return -EBUSY; |
2357 | } | |
2358 | return 0; | |
2359 | } | |
2360 | ||
2361 | /* | |
2362 | ***************************************************************************** | |
2363 | * PCIe MSI/MSI-X INTERRUPT HANDLERS | |
2364 | ***************************************************************************** | |
2365 | */ | |
2366 | ||
2367 | static irqreturn_t skd_reserved_isr(int irq, void *skd_host_data) | |
2368 | { | |
2369 | struct skd_device *skdev = skd_host_data; | |
2370 | unsigned long flags; | |
2371 | ||
2372 | spin_lock_irqsave(&skdev->lock, flags); | |
f98806d6 BVA |
2373 | dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
2374 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
2375 | dev_err(&skdev->pdev->dev, "MSIX reserved irq %d = 0x%x\n", irq, | |
2376 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
2377 | SKD_WRITEL(skdev, FIT_INT_RESERVED_MASK, FIT_INT_STATUS_HOST); |
2378 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2379 | return IRQ_HANDLED; | |
2380 | } | |
2381 | ||
2382 | static irqreturn_t skd_statec_isr(int irq, void *skd_host_data) | |
2383 | { | |
2384 | struct skd_device *skdev = skd_host_data; | |
2385 | unsigned long flags; | |
2386 | ||
2387 | spin_lock_irqsave(&skdev->lock, flags); | |
f98806d6 BVA |
2388 | dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
2389 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
2390 | SKD_WRITEL(skdev, FIT_ISH_FW_STATE_CHANGE, FIT_INT_STATUS_HOST); |
2391 | skd_isr_fwstate(skdev); | |
2392 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2393 | return IRQ_HANDLED; | |
2394 | } | |
2395 | ||
2396 | static irqreturn_t skd_comp_q(int irq, void *skd_host_data) | |
2397 | { | |
2398 | struct skd_device *skdev = skd_host_data; | |
2399 | unsigned long flags; | |
2400 | int flush_enqueued = 0; | |
2401 | int deferred; | |
2402 | ||
2403 | spin_lock_irqsave(&skdev->lock, flags); | |
f98806d6 BVA |
2404 | dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
2405 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
2406 | SKD_WRITEL(skdev, FIT_ISH_COMPLETION_POSTED, FIT_INT_STATUS_HOST); |
2407 | deferred = skd_isr_completion_posted(skdev, skd_isr_comp_limit, | |
2408 | &flush_enqueued); | |
e67f86b3 | 2409 | if (flush_enqueued) |
ca33dd92 | 2410 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
2411 | |
2412 | if (deferred) | |
2413 | schedule_work(&skdev->completion_worker); | |
2414 | else if (!flush_enqueued) | |
ca33dd92 | 2415 | schedule_work(&skdev->start_queue); |
e67f86b3 AB |
2416 | |
2417 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2418 | ||
2419 | return IRQ_HANDLED; | |
2420 | } | |
2421 | ||
2422 | static irqreturn_t skd_msg_isr(int irq, void *skd_host_data) | |
2423 | { | |
2424 | struct skd_device *skdev = skd_host_data; | |
2425 | unsigned long flags; | |
2426 | ||
2427 | spin_lock_irqsave(&skdev->lock, flags); | |
f98806d6 BVA |
2428 | dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
2429 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
2430 | SKD_WRITEL(skdev, FIT_ISH_MSG_FROM_DEV, FIT_INT_STATUS_HOST); |
2431 | skd_isr_msg_from_dev(skdev); | |
2432 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2433 | return IRQ_HANDLED; | |
2434 | } | |
2435 | ||
2436 | static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data) | |
2437 | { | |
2438 | struct skd_device *skdev = skd_host_data; | |
2439 | unsigned long flags; | |
2440 | ||
2441 | spin_lock_irqsave(&skdev->lock, flags); | |
f98806d6 BVA |
2442 | dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
2443 | SKD_READL(skdev, FIT_INT_STATUS_HOST)); | |
e67f86b3 AB |
2444 | SKD_WRITEL(skdev, FIT_INT_QUEUE_FULL, FIT_INT_STATUS_HOST); |
2445 | spin_unlock_irqrestore(&skdev->lock, flags); | |
2446 | return IRQ_HANDLED; | |
2447 | } | |
2448 | ||
2449 | /* | |
2450 | ***************************************************************************** | |
2451 | * PCIe MSI/MSI-X SETUP | |
2452 | ***************************************************************************** | |
2453 | */ | |
2454 | ||
2455 | struct skd_msix_entry { | |
e67f86b3 AB |
2456 | char isr_name[30]; |
2457 | }; | |
2458 | ||
2459 | struct skd_init_msix_entry { | |
2460 | const char *name; | |
2461 | irq_handler_t handler; | |
2462 | }; | |
2463 | ||
2464 | #define SKD_MAX_MSIX_COUNT 13 | |
2465 | #define SKD_MIN_MSIX_COUNT 7 | |
2466 | #define SKD_BASE_MSIX_IRQ 4 | |
2467 | ||
2468 | static struct skd_init_msix_entry msix_entries[SKD_MAX_MSIX_COUNT] = { | |
2469 | { "(DMA 0)", skd_reserved_isr }, | |
2470 | { "(DMA 1)", skd_reserved_isr }, | |
2471 | { "(DMA 2)", skd_reserved_isr }, | |
2472 | { "(DMA 3)", skd_reserved_isr }, | |
2473 | { "(State Change)", skd_statec_isr }, | |
2474 | { "(COMPL_Q)", skd_comp_q }, | |
2475 | { "(MSG)", skd_msg_isr }, | |
2476 | { "(Reserved)", skd_reserved_isr }, | |
2477 | { "(Reserved)", skd_reserved_isr }, | |
2478 | { "(Queue Full 0)", skd_qfull_isr }, | |
2479 | { "(Queue Full 1)", skd_qfull_isr }, | |
2480 | { "(Queue Full 2)", skd_qfull_isr }, | |
2481 | { "(Queue Full 3)", skd_qfull_isr }, | |
2482 | }; | |
2483 | ||
e67f86b3 AB |
2484 | static int skd_acquire_msix(struct skd_device *skdev) |
2485 | { | |
a9df8625 | 2486 | int i, rc; |
46817769 | 2487 | struct pci_dev *pdev = skdev->pdev; |
e67f86b3 | 2488 | |
180b0ae7 CH |
2489 | rc = pci_alloc_irq_vectors(pdev, SKD_MAX_MSIX_COUNT, SKD_MAX_MSIX_COUNT, |
2490 | PCI_IRQ_MSIX); | |
2491 | if (rc < 0) { | |
f98806d6 | 2492 | dev_err(&skdev->pdev->dev, "failed to enable MSI-X %d\n", rc); |
3bc8492f | 2493 | goto out; |
e67f86b3 | 2494 | } |
46817769 | 2495 | |
180b0ae7 CH |
2496 | skdev->msix_entries = kcalloc(SKD_MAX_MSIX_COUNT, |
2497 | sizeof(struct skd_msix_entry), GFP_KERNEL); | |
e67f86b3 AB |
2498 | if (!skdev->msix_entries) { |
2499 | rc = -ENOMEM; | |
f98806d6 | 2500 | dev_err(&skdev->pdev->dev, "msix table allocation error\n"); |
3bc8492f | 2501 | goto out; |
e67f86b3 AB |
2502 | } |
2503 | ||
e67f86b3 | 2504 | /* Enable MSI-X vectors for the base queue */ |
180b0ae7 CH |
2505 | for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { |
2506 | struct skd_msix_entry *qentry = &skdev->msix_entries[i]; | |
2507 | ||
e67f86b3 AB |
2508 | snprintf(qentry->isr_name, sizeof(qentry->isr_name), |
2509 | "%s%d-msix %s", DRV_NAME, skdev->devno, | |
2510 | msix_entries[i].name); | |
180b0ae7 CH |
2511 | |
2512 | rc = devm_request_irq(&skdev->pdev->dev, | |
2513 | pci_irq_vector(skdev->pdev, i), | |
2514 | msix_entries[i].handler, 0, | |
2515 | qentry->isr_name, skdev); | |
e67f86b3 | 2516 | if (rc) { |
f98806d6 BVA |
2517 | dev_err(&skdev->pdev->dev, |
2518 | "Unable to register(%d) MSI-X handler %d: %s\n", | |
2519 | rc, i, qentry->isr_name); | |
e67f86b3 | 2520 | goto msix_out; |
e67f86b3 AB |
2521 | } |
2522 | } | |
180b0ae7 | 2523 | |
f98806d6 BVA |
2524 | dev_dbg(&skdev->pdev->dev, "%d msix irq(s) enabled\n", |
2525 | SKD_MAX_MSIX_COUNT); | |
e67f86b3 AB |
2526 | return 0; |
2527 | ||
2528 | msix_out: | |
180b0ae7 CH |
2529 | while (--i >= 0) |
2530 | devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), skdev); | |
3bc8492f | 2531 | out: |
180b0ae7 CH |
2532 | kfree(skdev->msix_entries); |
2533 | skdev->msix_entries = NULL; | |
e67f86b3 AB |
2534 | return rc; |
2535 | } | |
2536 | ||
2537 | static int skd_acquire_irq(struct skd_device *skdev) | |
2538 | { | |
180b0ae7 CH |
2539 | struct pci_dev *pdev = skdev->pdev; |
2540 | unsigned int irq_flag = PCI_IRQ_LEGACY; | |
e67f86b3 | 2541 | int rc; |
e67f86b3 | 2542 | |
180b0ae7 | 2543 | if (skd_isr_type == SKD_IRQ_MSIX) { |
e67f86b3 AB |
2544 | rc = skd_acquire_msix(skdev); |
2545 | if (!rc) | |
180b0ae7 CH |
2546 | return 0; |
2547 | ||
f98806d6 BVA |
2548 | dev_err(&skdev->pdev->dev, |
2549 | "failed to enable MSI-X, re-trying with MSI %d\n", rc); | |
e67f86b3 | 2550 | } |
180b0ae7 CH |
2551 | |
2552 | snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d", DRV_NAME, | |
2553 | skdev->devno); | |
2554 | ||
2555 | if (skd_isr_type != SKD_IRQ_LEGACY) | |
2556 | irq_flag |= PCI_IRQ_MSI; | |
2557 | rc = pci_alloc_irq_vectors(pdev, 1, 1, irq_flag); | |
2558 | if (rc < 0) { | |
f98806d6 BVA |
2559 | dev_err(&skdev->pdev->dev, |
2560 | "failed to allocate the MSI interrupt %d\n", rc); | |
180b0ae7 CH |
2561 | return rc; |
2562 | } | |
2563 | ||
2564 | rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, | |
2565 | pdev->msi_enabled ? 0 : IRQF_SHARED, | |
2566 | skdev->isr_name, skdev); | |
2567 | if (rc) { | |
2568 | pci_free_irq_vectors(pdev); | |
f98806d6 BVA |
2569 | dev_err(&skdev->pdev->dev, "failed to allocate interrupt %d\n", |
2570 | rc); | |
180b0ae7 CH |
2571 | return rc; |
2572 | } | |
2573 | ||
2574 | return 0; | |
e67f86b3 AB |
2575 | } |
2576 | ||
2577 | static void skd_release_irq(struct skd_device *skdev) | |
2578 | { | |
180b0ae7 CH |
2579 | struct pci_dev *pdev = skdev->pdev; |
2580 | ||
2581 | if (skdev->msix_entries) { | |
2582 | int i; | |
2583 | ||
2584 | for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { | |
2585 | devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), | |
2586 | skdev); | |
2587 | } | |
2588 | ||
2589 | kfree(skdev->msix_entries); | |
2590 | skdev->msix_entries = NULL; | |
2591 | } else { | |
2592 | devm_free_irq(&pdev->dev, pdev->irq, skdev); | |
e67f86b3 | 2593 | } |
180b0ae7 CH |
2594 | |
2595 | pci_free_irq_vectors(pdev); | |
e67f86b3 AB |
2596 | } |
2597 | ||
2598 | /* | |
2599 | ***************************************************************************** | |
2600 | * CONSTRUCT | |
2601 | ***************************************************************************** | |
2602 | */ | |
2603 | ||
a3db102d BVA |
2604 | static void *skd_alloc_dma(struct skd_device *skdev, struct kmem_cache *s, |
2605 | dma_addr_t *dma_handle, gfp_t gfp, | |
2606 | enum dma_data_direction dir) | |
2607 | { | |
2608 | struct device *dev = &skdev->pdev->dev; | |
2609 | void *buf; | |
2610 | ||
2611 | buf = kmem_cache_alloc(s, gfp); | |
2612 | if (!buf) | |
2613 | return NULL; | |
1d518775 AB |
2614 | *dma_handle = dma_map_single(dev, buf, |
2615 | kmem_cache_size(s), dir); | |
a3db102d | 2616 | if (dma_mapping_error(dev, *dma_handle)) { |
09aa97c7 | 2617 | kmem_cache_free(s, buf); |
a3db102d BVA |
2618 | buf = NULL; |
2619 | } | |
2620 | return buf; | |
2621 | } | |
2622 | ||
2623 | static void skd_free_dma(struct skd_device *skdev, struct kmem_cache *s, | |
2624 | void *vaddr, dma_addr_t dma_handle, | |
2625 | enum dma_data_direction dir) | |
2626 | { | |
2627 | if (!vaddr) | |
2628 | return; | |
2629 | ||
1d518775 AB |
2630 | dma_unmap_single(&skdev->pdev->dev, dma_handle, |
2631 | kmem_cache_size(s), dir); | |
a3db102d BVA |
2632 | kmem_cache_free(s, vaddr); |
2633 | } | |
2634 | ||
e67f86b3 AB |
2635 | static int skd_cons_skcomp(struct skd_device *skdev) |
2636 | { | |
2637 | int rc = 0; | |
2638 | struct fit_completion_entry_v1 *skcomp; | |
e67f86b3 | 2639 | |
f98806d6 | 2640 | dev_dbg(&skdev->pdev->dev, |
6f7c7675 BVA |
2641 | "comp pci_alloc, total bytes %zd entries %d\n", |
2642 | SKD_SKCOMP_SIZE, SKD_N_COMPLETION_ENTRY); | |
e67f86b3 | 2643 | |
750afb08 LC |
2644 | skcomp = dma_alloc_coherent(&skdev->pdev->dev, SKD_SKCOMP_SIZE, |
2645 | &skdev->cq_dma_address, GFP_KERNEL); | |
e67f86b3 AB |
2646 | |
2647 | if (skcomp == NULL) { | |
2648 | rc = -ENOMEM; | |
2649 | goto err_out; | |
2650 | } | |
2651 | ||
e67f86b3 AB |
2652 | skdev->skcomp_table = skcomp; |
2653 | skdev->skerr_table = (struct fit_comp_error_info *)((char *)skcomp + | |
2654 | sizeof(*skcomp) * | |
2655 | SKD_N_COMPLETION_ENTRY); | |
2656 | ||
2657 | err_out: | |
2658 | return rc; | |
2659 | } | |
2660 | ||
2661 | static int skd_cons_skmsg(struct skd_device *skdev) | |
2662 | { | |
2663 | int rc = 0; | |
2664 | u32 i; | |
2665 | ||
f98806d6 | 2666 | dev_dbg(&skdev->pdev->dev, |
01433d0d | 2667 | "skmsg_table kcalloc, struct %lu, count %u total %lu\n", |
f98806d6 BVA |
2668 | sizeof(struct skd_fitmsg_context), skdev->num_fitmsg_context, |
2669 | sizeof(struct skd_fitmsg_context) * skdev->num_fitmsg_context); | |
e67f86b3 | 2670 | |
01433d0d BVA |
2671 | skdev->skmsg_table = kcalloc(skdev->num_fitmsg_context, |
2672 | sizeof(struct skd_fitmsg_context), | |
2673 | GFP_KERNEL); | |
e67f86b3 AB |
2674 | if (skdev->skmsg_table == NULL) { |
2675 | rc = -ENOMEM; | |
2676 | goto err_out; | |
2677 | } | |
2678 | ||
2679 | for (i = 0; i < skdev->num_fitmsg_context; i++) { | |
2680 | struct skd_fitmsg_context *skmsg; | |
2681 | ||
2682 | skmsg = &skdev->skmsg_table[i]; | |
2683 | ||
2684 | skmsg->id = i + SKD_ID_FIT_MSG; | |
2685 | ||
13812621 CH |
2686 | skmsg->msg_buf = dma_alloc_coherent(&skdev->pdev->dev, |
2687 | SKD_N_FITMSG_BYTES, | |
2688 | &skmsg->mb_dma_address, | |
2689 | GFP_KERNEL); | |
e67f86b3 AB |
2690 | if (skmsg->msg_buf == NULL) { |
2691 | rc = -ENOMEM; | |
2692 | goto err_out; | |
2693 | } | |
2694 | ||
6507f436 BVA |
2695 | WARN(((uintptr_t)skmsg->msg_buf | skmsg->mb_dma_address) & |
2696 | (FIT_QCMD_ALIGN - 1), | |
ea870bb2 HD |
2697 | "not aligned: msg_buf %p mb_dma_address %pad\n", |
2698 | skmsg->msg_buf, &skmsg->mb_dma_address); | |
e67f86b3 | 2699 | memset(skmsg->msg_buf, 0, SKD_N_FITMSG_BYTES); |
e67f86b3 AB |
2700 | } |
2701 | ||
e67f86b3 AB |
2702 | err_out: |
2703 | return rc; | |
2704 | } | |
2705 | ||
542d7b00 BZ |
2706 | static struct fit_sg_descriptor *skd_cons_sg_list(struct skd_device *skdev, |
2707 | u32 n_sg, | |
2708 | dma_addr_t *ret_dma_addr) | |
2709 | { | |
2710 | struct fit_sg_descriptor *sg_list; | |
542d7b00 | 2711 | |
a3db102d BVA |
2712 | sg_list = skd_alloc_dma(skdev, skdev->sglist_cache, ret_dma_addr, |
2713 | GFP_DMA | __GFP_ZERO, DMA_TO_DEVICE); | |
542d7b00 BZ |
2714 | |
2715 | if (sg_list != NULL) { | |
2716 | uint64_t dma_address = *ret_dma_addr; | |
2717 | u32 i; | |
2718 | ||
542d7b00 BZ |
2719 | for (i = 0; i < n_sg - 1; i++) { |
2720 | uint64_t ndp_off; | |
2721 | ndp_off = (i + 1) * sizeof(struct fit_sg_descriptor); | |
2722 | ||
2723 | sg_list[i].next_desc_ptr = dma_address + ndp_off; | |
2724 | } | |
2725 | sg_list[i].next_desc_ptr = 0LL; | |
2726 | } | |
2727 | ||
2728 | return sg_list; | |
2729 | } | |
2730 | ||
5d003240 | 2731 | static void skd_free_sg_list(struct skd_device *skdev, |
a3db102d | 2732 | struct fit_sg_descriptor *sg_list, |
5d003240 BVA |
2733 | dma_addr_t dma_addr) |
2734 | { | |
5d003240 BVA |
2735 | if (WARN_ON_ONCE(!sg_list)) |
2736 | return; | |
2737 | ||
a3db102d BVA |
2738 | skd_free_dma(skdev, skdev->sglist_cache, sg_list, dma_addr, |
2739 | DMA_TO_DEVICE); | |
5d003240 BVA |
2740 | } |
2741 | ||
ca33dd92 BVA |
2742 | static int skd_init_request(struct blk_mq_tag_set *set, struct request *rq, |
2743 | unsigned int hctx_idx, unsigned int numa_node) | |
e67f86b3 | 2744 | { |
ca33dd92 | 2745 | struct skd_device *skdev = set->driver_data; |
e7278a8b | 2746 | struct skd_request_context *skreq = blk_mq_rq_to_pdu(rq); |
e67f86b3 | 2747 | |
e7278a8b BVA |
2748 | skreq->state = SKD_REQ_STATE_IDLE; |
2749 | skreq->sg = (void *)(skreq + 1); | |
2750 | sg_init_table(skreq->sg, skd_sgs_per_request); | |
2751 | skreq->sksg_list = skd_cons_sg_list(skdev, skd_sgs_per_request, | |
2752 | &skreq->sksg_dma_address); | |
e67f86b3 | 2753 | |
e7278a8b BVA |
2754 | return skreq->sksg_list ? 0 : -ENOMEM; |
2755 | } | |
e67f86b3 | 2756 | |
ca33dd92 BVA |
2757 | static void skd_exit_request(struct blk_mq_tag_set *set, struct request *rq, |
2758 | unsigned int hctx_idx) | |
e7278a8b | 2759 | { |
ca33dd92 | 2760 | struct skd_device *skdev = set->driver_data; |
e7278a8b | 2761 | struct skd_request_context *skreq = blk_mq_rq_to_pdu(rq); |
e67f86b3 | 2762 | |
a3db102d | 2763 | skd_free_sg_list(skdev, skreq->sksg_list, skreq->sksg_dma_address); |
e67f86b3 AB |
2764 | } |
2765 | ||
e67f86b3 AB |
2766 | static int skd_cons_sksb(struct skd_device *skdev) |
2767 | { | |
2768 | int rc = 0; | |
2769 | struct skd_special_context *skspcl; | |
e67f86b3 AB |
2770 | |
2771 | skspcl = &skdev->internal_skspcl; | |
2772 | ||
2773 | skspcl->req.id = 0 + SKD_ID_INTERNAL; | |
2774 | skspcl->req.state = SKD_REQ_STATE_IDLE; | |
2775 | ||
a3db102d BVA |
2776 | skspcl->data_buf = skd_alloc_dma(skdev, skdev->databuf_cache, |
2777 | &skspcl->db_dma_address, | |
2778 | GFP_DMA | __GFP_ZERO, | |
2779 | DMA_BIDIRECTIONAL); | |
e67f86b3 AB |
2780 | if (skspcl->data_buf == NULL) { |
2781 | rc = -ENOMEM; | |
2782 | goto err_out; | |
2783 | } | |
2784 | ||
a3db102d BVA |
2785 | skspcl->msg_buf = skd_alloc_dma(skdev, skdev->msgbuf_cache, |
2786 | &skspcl->mb_dma_address, | |
2787 | GFP_DMA | __GFP_ZERO, DMA_TO_DEVICE); | |
e67f86b3 AB |
2788 | if (skspcl->msg_buf == NULL) { |
2789 | rc = -ENOMEM; | |
2790 | goto err_out; | |
2791 | } | |
2792 | ||
e67f86b3 AB |
2793 | skspcl->req.sksg_list = skd_cons_sg_list(skdev, 1, |
2794 | &skspcl->req.sksg_dma_address); | |
2795 | if (skspcl->req.sksg_list == NULL) { | |
2796 | rc = -ENOMEM; | |
2797 | goto err_out; | |
2798 | } | |
2799 | ||
2800 | if (!skd_format_internal_skspcl(skdev)) { | |
2801 | rc = -EINVAL; | |
2802 | goto err_out; | |
2803 | } | |
2804 | ||
2805 | err_out: | |
2806 | return rc; | |
2807 | } | |
2808 | ||
ca33dd92 BVA |
2809 | static const struct blk_mq_ops skd_mq_ops = { |
2810 | .queue_rq = skd_mq_queue_rq, | |
296cb94c | 2811 | .complete = skd_complete_rq, |
f2fe4459 | 2812 | .timeout = skd_timed_out, |
ca33dd92 BVA |
2813 | .init_request = skd_init_request, |
2814 | .exit_request = skd_exit_request, | |
2815 | }; | |
2816 | ||
e67f86b3 AB |
2817 | static int skd_cons_disk(struct skd_device *skdev) |
2818 | { | |
2819 | int rc = 0; | |
2820 | struct gendisk *disk; | |
2821 | struct request_queue *q; | |
2822 | unsigned long flags; | |
2823 | ||
2824 | disk = alloc_disk(SKD_MINORS_PER_DEVICE); | |
2825 | if (!disk) { | |
2826 | rc = -ENOMEM; | |
2827 | goto err_out; | |
2828 | } | |
2829 | ||
2830 | skdev->disk = disk; | |
2831 | sprintf(disk->disk_name, DRV_NAME "%u", skdev->devno); | |
2832 | ||
2833 | disk->major = skdev->major; | |
2834 | disk->first_minor = skdev->devno * SKD_MINORS_PER_DEVICE; | |
2835 | disk->fops = &skd_blockdev_ops; | |
2836 | disk->private_data = skdev; | |
2837 | ||
ca33dd92 BVA |
2838 | memset(&skdev->tag_set, 0, sizeof(skdev->tag_set)); |
2839 | skdev->tag_set.ops = &skd_mq_ops; | |
2840 | skdev->tag_set.nr_hw_queues = 1; | |
2841 | skdev->tag_set.queue_depth = skd_max_queue_depth; | |
2842 | skdev->tag_set.cmd_size = sizeof(struct skd_request_context) + | |
2843 | skdev->sgs_per_request * sizeof(struct scatterlist); | |
2844 | skdev->tag_set.numa_node = NUMA_NO_NODE; | |
2845 | skdev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | | |
2846 | BLK_MQ_F_SG_MERGE | | |
2847 | BLK_ALLOC_POLICY_TO_MQ_FLAG(BLK_TAG_ALLOC_FIFO); | |
2848 | skdev->tag_set.driver_data = skdev; | |
92d499d4 DC |
2849 | rc = blk_mq_alloc_tag_set(&skdev->tag_set); |
2850 | if (rc) | |
2851 | goto err_out; | |
2852 | q = blk_mq_init_queue(&skdev->tag_set); | |
2853 | if (IS_ERR(q)) { | |
2854 | blk_mq_free_tag_set(&skdev->tag_set); | |
2855 | rc = PTR_ERR(q); | |
e67f86b3 AB |
2856 | goto err_out; |
2857 | } | |
e7278a8b | 2858 | q->queuedata = skdev; |
e67f86b3 AB |
2859 | |
2860 | skdev->queue = q; | |
2861 | disk->queue = q; | |
e67f86b3 | 2862 | |
6975f732 | 2863 | blk_queue_write_cache(q, true, true); |
e67f86b3 AB |
2864 | blk_queue_max_segments(q, skdev->sgs_per_request); |
2865 | blk_queue_max_hw_sectors(q, SKD_N_MAX_SECTORS); | |
2866 | ||
a5c5b392 | 2867 | /* set optimal I/O size to 8KB */ |
e67f86b3 AB |
2868 | blk_queue_io_opt(q, 8192); |
2869 | ||
8b904b5b BVA |
2870 | blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
2871 | blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); | |
e67f86b3 | 2872 | |
a74d5b76 | 2873 | blk_queue_rq_timeout(q, 8 * HZ); |
a74d5b76 | 2874 | |
e67f86b3 | 2875 | spin_lock_irqsave(&skdev->lock, flags); |
f98806d6 | 2876 | dev_dbg(&skdev->pdev->dev, "stopping queue\n"); |
ca33dd92 | 2877 | blk_mq_stop_hw_queues(skdev->queue); |
e67f86b3 AB |
2878 | spin_unlock_irqrestore(&skdev->lock, flags); |
2879 | ||
2880 | err_out: | |
2881 | return rc; | |
2882 | } | |
2883 | ||
542d7b00 BZ |
2884 | #define SKD_N_DEV_TABLE 16u |
2885 | static u32 skd_next_devno; | |
e67f86b3 | 2886 | |
542d7b00 | 2887 | static struct skd_device *skd_construct(struct pci_dev *pdev) |
e67f86b3 | 2888 | { |
542d7b00 BZ |
2889 | struct skd_device *skdev; |
2890 | int blk_major = skd_major; | |
a3db102d | 2891 | size_t size; |
542d7b00 | 2892 | int rc; |
e67f86b3 | 2893 | |
542d7b00 | 2894 | skdev = kzalloc(sizeof(*skdev), GFP_KERNEL); |
e67f86b3 | 2895 | |
542d7b00 | 2896 | if (!skdev) { |
f98806d6 | 2897 | dev_err(&pdev->dev, "memory alloc failure\n"); |
542d7b00 BZ |
2898 | return NULL; |
2899 | } | |
e67f86b3 | 2900 | |
542d7b00 BZ |
2901 | skdev->state = SKD_DRVR_STATE_LOAD; |
2902 | skdev->pdev = pdev; | |
2903 | skdev->devno = skd_next_devno++; | |
2904 | skdev->major = blk_major; | |
542d7b00 | 2905 | skdev->dev_max_queue_depth = 0; |
e67f86b3 | 2906 | |
542d7b00 BZ |
2907 | skdev->num_req_context = skd_max_queue_depth; |
2908 | skdev->num_fitmsg_context = skd_max_queue_depth; | |
542d7b00 BZ |
2909 | skdev->cur_max_queue_depth = 1; |
2910 | skdev->queue_low_water_mark = 1; | |
2911 | skdev->proto_ver = 99; | |
2912 | skdev->sgs_per_request = skd_sgs_per_request; | |
2913 | skdev->dbg_level = skd_dbg_level; | |
e67f86b3 | 2914 | |
542d7b00 BZ |
2915 | spin_lock_init(&skdev->lock); |
2916 | ||
ca33dd92 | 2917 | INIT_WORK(&skdev->start_queue, skd_start_queue); |
542d7b00 | 2918 | INIT_WORK(&skdev->completion_worker, skd_completion_worker); |
e67f86b3 | 2919 | |
a3db102d BVA |
2920 | size = max(SKD_N_FITMSG_BYTES, SKD_N_SPECIAL_FITMSG_BYTES); |
2921 | skdev->msgbuf_cache = kmem_cache_create("skd-msgbuf", size, 0, | |
2922 | SLAB_HWCACHE_ALIGN, NULL); | |
2923 | if (!skdev->msgbuf_cache) | |
2924 | goto err_out; | |
2925 | WARN_ONCE(kmem_cache_size(skdev->msgbuf_cache) < size, | |
2926 | "skd-msgbuf: %d < %zd\n", | |
2927 | kmem_cache_size(skdev->msgbuf_cache), size); | |
2928 | size = skd_sgs_per_request * sizeof(struct fit_sg_descriptor); | |
2929 | skdev->sglist_cache = kmem_cache_create("skd-sglist", size, 0, | |
2930 | SLAB_HWCACHE_ALIGN, NULL); | |
2931 | if (!skdev->sglist_cache) | |
2932 | goto err_out; | |
2933 | WARN_ONCE(kmem_cache_size(skdev->sglist_cache) < size, | |
2934 | "skd-sglist: %d < %zd\n", | |
2935 | kmem_cache_size(skdev->sglist_cache), size); | |
2936 | size = SKD_N_INTERNAL_BYTES; | |
2937 | skdev->databuf_cache = kmem_cache_create("skd-databuf", size, 0, | |
2938 | SLAB_HWCACHE_ALIGN, NULL); | |
2939 | if (!skdev->databuf_cache) | |
2940 | goto err_out; | |
2941 | WARN_ONCE(kmem_cache_size(skdev->databuf_cache) < size, | |
2942 | "skd-databuf: %d < %zd\n", | |
2943 | kmem_cache_size(skdev->databuf_cache), size); | |
2944 | ||
f98806d6 | 2945 | dev_dbg(&skdev->pdev->dev, "skcomp\n"); |
542d7b00 BZ |
2946 | rc = skd_cons_skcomp(skdev); |
2947 | if (rc < 0) | |
2948 | goto err_out; | |
e67f86b3 | 2949 | |
f98806d6 | 2950 | dev_dbg(&skdev->pdev->dev, "skmsg\n"); |
542d7b00 BZ |
2951 | rc = skd_cons_skmsg(skdev); |
2952 | if (rc < 0) | |
2953 | goto err_out; | |
2954 | ||
f98806d6 | 2955 | dev_dbg(&skdev->pdev->dev, "sksb\n"); |
542d7b00 BZ |
2956 | rc = skd_cons_sksb(skdev); |
2957 | if (rc < 0) | |
2958 | goto err_out; | |
2959 | ||
f98806d6 | 2960 | dev_dbg(&skdev->pdev->dev, "disk\n"); |
542d7b00 BZ |
2961 | rc = skd_cons_disk(skdev); |
2962 | if (rc < 0) | |
2963 | goto err_out; | |
2964 | ||
f98806d6 | 2965 | dev_dbg(&skdev->pdev->dev, "VICTORY\n"); |
542d7b00 BZ |
2966 | return skdev; |
2967 | ||
2968 | err_out: | |
f98806d6 | 2969 | dev_dbg(&skdev->pdev->dev, "construct failed\n"); |
542d7b00 BZ |
2970 | skd_destruct(skdev); |
2971 | return NULL; | |
e67f86b3 AB |
2972 | } |
2973 | ||
542d7b00 BZ |
2974 | /* |
2975 | ***************************************************************************** | |
2976 | * DESTRUCT (FREE) | |
2977 | ***************************************************************************** | |
2978 | */ | |
2979 | ||
e67f86b3 AB |
2980 | static void skd_free_skcomp(struct skd_device *skdev) |
2981 | { | |
7f13bdad | 2982 | if (skdev->skcomp_table) |
13812621 CH |
2983 | dma_free_coherent(&skdev->pdev->dev, SKD_SKCOMP_SIZE, |
2984 | skdev->skcomp_table, skdev->cq_dma_address); | |
e67f86b3 AB |
2985 | |
2986 | skdev->skcomp_table = NULL; | |
2987 | skdev->cq_dma_address = 0; | |
2988 | } | |
2989 | ||
2990 | static void skd_free_skmsg(struct skd_device *skdev) | |
2991 | { | |
2992 | u32 i; | |
2993 | ||
2994 | if (skdev->skmsg_table == NULL) | |
2995 | return; | |
2996 | ||
2997 | for (i = 0; i < skdev->num_fitmsg_context; i++) { | |
2998 | struct skd_fitmsg_context *skmsg; | |
2999 | ||
3000 | skmsg = &skdev->skmsg_table[i]; | |
3001 | ||
3002 | if (skmsg->msg_buf != NULL) { | |
13812621 CH |
3003 | dma_free_coherent(&skdev->pdev->dev, SKD_N_FITMSG_BYTES, |
3004 | skmsg->msg_buf, | |
e67f86b3 AB |
3005 | skmsg->mb_dma_address); |
3006 | } | |
3007 | skmsg->msg_buf = NULL; | |
3008 | skmsg->mb_dma_address = 0; | |
3009 | } | |
3010 | ||
3011 | kfree(skdev->skmsg_table); | |
3012 | skdev->skmsg_table = NULL; | |
3013 | } | |
3014 | ||
e67f86b3 AB |
3015 | static void skd_free_sksb(struct skd_device *skdev) |
3016 | { | |
a3db102d | 3017 | struct skd_special_context *skspcl = &skdev->internal_skspcl; |
e67f86b3 | 3018 | |
a3db102d BVA |
3019 | skd_free_dma(skdev, skdev->databuf_cache, skspcl->data_buf, |
3020 | skspcl->db_dma_address, DMA_BIDIRECTIONAL); | |
e67f86b3 AB |
3021 | |
3022 | skspcl->data_buf = NULL; | |
3023 | skspcl->db_dma_address = 0; | |
3024 | ||
a3db102d BVA |
3025 | skd_free_dma(skdev, skdev->msgbuf_cache, skspcl->msg_buf, |
3026 | skspcl->mb_dma_address, DMA_TO_DEVICE); | |
e67f86b3 AB |
3027 | |
3028 | skspcl->msg_buf = NULL; | |
3029 | skspcl->mb_dma_address = 0; | |
3030 | ||
a3db102d | 3031 | skd_free_sg_list(skdev, skspcl->req.sksg_list, |
e67f86b3 AB |
3032 | skspcl->req.sksg_dma_address); |
3033 | ||
3034 | skspcl->req.sksg_list = NULL; | |
3035 | skspcl->req.sksg_dma_address = 0; | |
3036 | } | |
3037 | ||
e67f86b3 AB |
3038 | static void skd_free_disk(struct skd_device *skdev) |
3039 | { | |
3040 | struct gendisk *disk = skdev->disk; | |
3041 | ||
7277cc67 BVA |
3042 | if (disk && (disk->flags & GENHD_FL_UP)) |
3043 | del_gendisk(disk); | |
3044 | ||
3045 | if (skdev->queue) { | |
3046 | blk_cleanup_queue(skdev->queue); | |
3047 | skdev->queue = NULL; | |
4633504c BVA |
3048 | if (disk) |
3049 | disk->queue = NULL; | |
e67f86b3 | 3050 | } |
7277cc67 | 3051 | |
ca33dd92 BVA |
3052 | if (skdev->tag_set.tags) |
3053 | blk_mq_free_tag_set(&skdev->tag_set); | |
3054 | ||
7277cc67 | 3055 | put_disk(disk); |
e67f86b3 AB |
3056 | skdev->disk = NULL; |
3057 | } | |
3058 | ||
542d7b00 BZ |
3059 | static void skd_destruct(struct skd_device *skdev) |
3060 | { | |
3061 | if (skdev == NULL) | |
3062 | return; | |
3063 | ||
ca33dd92 BVA |
3064 | cancel_work_sync(&skdev->start_queue); |
3065 | ||
f98806d6 | 3066 | dev_dbg(&skdev->pdev->dev, "disk\n"); |
542d7b00 BZ |
3067 | skd_free_disk(skdev); |
3068 | ||
f98806d6 | 3069 | dev_dbg(&skdev->pdev->dev, "sksb\n"); |
542d7b00 BZ |
3070 | skd_free_sksb(skdev); |
3071 | ||
f98806d6 | 3072 | dev_dbg(&skdev->pdev->dev, "skmsg\n"); |
542d7b00 | 3073 | skd_free_skmsg(skdev); |
e67f86b3 | 3074 | |
f98806d6 | 3075 | dev_dbg(&skdev->pdev->dev, "skcomp\n"); |
542d7b00 BZ |
3076 | skd_free_skcomp(skdev); |
3077 | ||
a3db102d BVA |
3078 | kmem_cache_destroy(skdev->databuf_cache); |
3079 | kmem_cache_destroy(skdev->sglist_cache); | |
3080 | kmem_cache_destroy(skdev->msgbuf_cache); | |
3081 | ||
f98806d6 | 3082 | dev_dbg(&skdev->pdev->dev, "skdev\n"); |
542d7b00 BZ |
3083 | kfree(skdev); |
3084 | } | |
e67f86b3 AB |
3085 | |
3086 | /* | |
3087 | ***************************************************************************** | |
3088 | * BLOCK DEVICE (BDEV) GLUE | |
3089 | ***************************************************************************** | |
3090 | */ | |
3091 | ||
3092 | static int skd_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
3093 | { | |
3094 | struct skd_device *skdev; | |
3095 | u64 capacity; | |
3096 | ||
3097 | skdev = bdev->bd_disk->private_data; | |
3098 | ||
f98806d6 BVA |
3099 | dev_dbg(&skdev->pdev->dev, "%s: CMD[%s] getgeo device\n", |
3100 | bdev->bd_disk->disk_name, current->comm); | |
e67f86b3 AB |
3101 | |
3102 | if (skdev->read_cap_is_valid) { | |
3103 | capacity = get_capacity(skdev->disk); | |
3104 | geo->heads = 64; | |
3105 | geo->sectors = 255; | |
3106 | geo->cylinders = (capacity) / (255 * 64); | |
3107 | ||
3108 | return 0; | |
3109 | } | |
3110 | return -EIO; | |
3111 | } | |
3112 | ||
0d52c756 | 3113 | static int skd_bdev_attach(struct device *parent, struct skd_device *skdev) |
e67f86b3 | 3114 | { |
f98806d6 | 3115 | dev_dbg(&skdev->pdev->dev, "add_disk\n"); |
fef912bf | 3116 | device_add_disk(parent, skdev->disk, NULL); |
e67f86b3 AB |
3117 | return 0; |
3118 | } | |
3119 | ||
3120 | static const struct block_device_operations skd_blockdev_ops = { | |
3121 | .owner = THIS_MODULE, | |
e67f86b3 AB |
3122 | .getgeo = skd_bdev_getgeo, |
3123 | }; | |
3124 | ||
e67f86b3 AB |
3125 | /* |
3126 | ***************************************************************************** | |
3127 | * PCIe DRIVER GLUE | |
3128 | ***************************************************************************** | |
3129 | */ | |
3130 | ||
9baa3c34 | 3131 | static const struct pci_device_id skd_pci_tbl[] = { |
e67f86b3 AB |
3132 | { PCI_VENDOR_ID_STEC, PCI_DEVICE_ID_S1120, |
3133 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, | |
3134 | { 0 } /* terminate list */ | |
3135 | }; | |
3136 | ||
3137 | MODULE_DEVICE_TABLE(pci, skd_pci_tbl); | |
3138 | ||
3139 | static char *skd_pci_info(struct skd_device *skdev, char *str) | |
3140 | { | |
3141 | int pcie_reg; | |
3142 | ||
3143 | strcpy(str, "PCIe ("); | |
3144 | pcie_reg = pci_find_capability(skdev->pdev, PCI_CAP_ID_EXP); | |
3145 | ||
3146 | if (pcie_reg) { | |
3147 | ||
3148 | char lwstr[6]; | |
3149 | uint16_t pcie_lstat, lspeed, lwidth; | |
3150 | ||
3151 | pcie_reg += 0x12; | |
3152 | pci_read_config_word(skdev->pdev, pcie_reg, &pcie_lstat); | |
3153 | lspeed = pcie_lstat & (0xF); | |
3154 | lwidth = (pcie_lstat & 0x3F0) >> 4; | |
3155 | ||
3156 | if (lspeed == 1) | |
3157 | strcat(str, "2.5GT/s "); | |
3158 | else if (lspeed == 2) | |
3159 | strcat(str, "5.0GT/s "); | |
3160 | else | |
3161 | strcat(str, "<unknown> "); | |
3162 | snprintf(lwstr, sizeof(lwstr), "%dX)", lwidth); | |
3163 | strcat(str, lwstr); | |
3164 | } | |
3165 | return str; | |
3166 | } | |
3167 | ||
3168 | static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
3169 | { | |
3170 | int i; | |
3171 | int rc = 0; | |
3172 | char pci_str[32]; | |
3173 | struct skd_device *skdev; | |
3174 | ||
bb9f7dd3 BVA |
3175 | dev_dbg(&pdev->dev, "vendor=%04X device=%04x\n", pdev->vendor, |
3176 | pdev->device); | |
e67f86b3 AB |
3177 | |
3178 | rc = pci_enable_device(pdev); | |
3179 | if (rc) | |
3180 | return rc; | |
3181 | rc = pci_request_regions(pdev, DRV_NAME); | |
3182 | if (rc) | |
3183 | goto err_out; | |
13812621 CH |
3184 | rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); |
3185 | if (rc) | |
d91dc172 | 3186 | rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
13812621 CH |
3187 | if (rc) { |
3188 | dev_err(&pdev->dev, "DMA mask error %d\n", rc); | |
3189 | goto err_out_regions; | |
e67f86b3 AB |
3190 | } |
3191 | ||
b8df6647 BZ |
3192 | if (!skd_major) { |
3193 | rc = register_blkdev(0, DRV_NAME); | |
3194 | if (rc < 0) | |
3195 | goto err_out_regions; | |
3196 | BUG_ON(!rc); | |
3197 | skd_major = rc; | |
3198 | } | |
3199 | ||
e67f86b3 | 3200 | skdev = skd_construct(pdev); |
1762b57f WY |
3201 | if (skdev == NULL) { |
3202 | rc = -ENOMEM; | |
e67f86b3 | 3203 | goto err_out_regions; |
1762b57f | 3204 | } |
e67f86b3 AB |
3205 | |
3206 | skd_pci_info(skdev, pci_str); | |
f98806d6 | 3207 | dev_info(&pdev->dev, "%s 64bit\n", pci_str); |
e67f86b3 AB |
3208 | |
3209 | pci_set_master(pdev); | |
3210 | rc = pci_enable_pcie_error_reporting(pdev); | |
3211 | if (rc) { | |
f98806d6 BVA |
3212 | dev_err(&pdev->dev, |
3213 | "bad enable of PCIe error reporting rc=%d\n", rc); | |
e67f86b3 AB |
3214 | skdev->pcie_error_reporting_is_enabled = 0; |
3215 | } else | |
3216 | skdev->pcie_error_reporting_is_enabled = 1; | |
3217 | ||
e67f86b3 | 3218 | pci_set_drvdata(pdev, skdev); |
ebedd16d | 3219 | |
e67f86b3 AB |
3220 | for (i = 0; i < SKD_MAX_BARS; i++) { |
3221 | skdev->mem_phys[i] = pci_resource_start(pdev, i); | |
3222 | skdev->mem_size[i] = (u32)pci_resource_len(pdev, i); | |
3223 | skdev->mem_map[i] = ioremap(skdev->mem_phys[i], | |
3224 | skdev->mem_size[i]); | |
3225 | if (!skdev->mem_map[i]) { | |
f98806d6 BVA |
3226 | dev_err(&pdev->dev, |
3227 | "Unable to map adapter memory!\n"); | |
e67f86b3 AB |
3228 | rc = -ENODEV; |
3229 | goto err_out_iounmap; | |
3230 | } | |
f98806d6 BVA |
3231 | dev_dbg(&pdev->dev, "mem_map=%p, phyd=%016llx, size=%d\n", |
3232 | skdev->mem_map[i], (uint64_t)skdev->mem_phys[i], | |
3233 | skdev->mem_size[i]); | |
e67f86b3 AB |
3234 | } |
3235 | ||
3236 | rc = skd_acquire_irq(skdev); | |
3237 | if (rc) { | |
f98806d6 | 3238 | dev_err(&pdev->dev, "interrupt resource error %d\n", rc); |
e67f86b3 AB |
3239 | goto err_out_iounmap; |
3240 | } | |
3241 | ||
3242 | rc = skd_start_timer(skdev); | |
3243 | if (rc) | |
3244 | goto err_out_timer; | |
3245 | ||
3246 | init_waitqueue_head(&skdev->waitq); | |
3247 | ||
3248 | skd_start_device(skdev); | |
3249 | ||
3250 | rc = wait_event_interruptible_timeout(skdev->waitq, | |
3251 | (skdev->gendisk_on), | |
3252 | (SKD_START_WAIT_SECONDS * HZ)); | |
3253 | if (skdev->gendisk_on > 0) { | |
3254 | /* device came on-line after reset */ | |
0d52c756 | 3255 | skd_bdev_attach(&pdev->dev, skdev); |
e67f86b3 AB |
3256 | rc = 0; |
3257 | } else { | |
3258 | /* we timed out, something is wrong with the device, | |
3259 | don't add the disk structure */ | |
f98806d6 BVA |
3260 | dev_err(&pdev->dev, "error: waiting for s1120 timed out %d!\n", |
3261 | rc); | |
e67f86b3 AB |
3262 | /* in case of no error; we timeout with ENXIO */ |
3263 | if (!rc) | |
3264 | rc = -ENXIO; | |
3265 | goto err_out_timer; | |
3266 | } | |
3267 | ||
e67f86b3 AB |
3268 | return rc; |
3269 | ||
3270 | err_out_timer: | |
3271 | skd_stop_device(skdev); | |
3272 | skd_release_irq(skdev); | |
3273 | ||
3274 | err_out_iounmap: | |
3275 | for (i = 0; i < SKD_MAX_BARS; i++) | |
3276 | if (skdev->mem_map[i]) | |
3277 | iounmap(skdev->mem_map[i]); | |
3278 | ||
3279 | if (skdev->pcie_error_reporting_is_enabled) | |
3280 | pci_disable_pcie_error_reporting(pdev); | |
3281 | ||
3282 | skd_destruct(skdev); | |
3283 | ||
3284 | err_out_regions: | |
3285 | pci_release_regions(pdev); | |
3286 | ||
3287 | err_out: | |
3288 | pci_disable_device(pdev); | |
3289 | pci_set_drvdata(pdev, NULL); | |
3290 | return rc; | |
3291 | } | |
3292 | ||
3293 | static void skd_pci_remove(struct pci_dev *pdev) | |
3294 | { | |
3295 | int i; | |
3296 | struct skd_device *skdev; | |
3297 | ||
3298 | skdev = pci_get_drvdata(pdev); | |
3299 | if (!skdev) { | |
f98806d6 | 3300 | dev_err(&pdev->dev, "no device data for PCI\n"); |
e67f86b3 AB |
3301 | return; |
3302 | } | |
3303 | skd_stop_device(skdev); | |
3304 | skd_release_irq(skdev); | |
3305 | ||
3306 | for (i = 0; i < SKD_MAX_BARS; i++) | |
3307 | if (skdev->mem_map[i]) | |
4854afe3 | 3308 | iounmap(skdev->mem_map[i]); |
e67f86b3 AB |
3309 | |
3310 | if (skdev->pcie_error_reporting_is_enabled) | |
3311 | pci_disable_pcie_error_reporting(pdev); | |
3312 | ||
3313 | skd_destruct(skdev); | |
3314 | ||
3315 | pci_release_regions(pdev); | |
3316 | pci_disable_device(pdev); | |
3317 | pci_set_drvdata(pdev, NULL); | |
3318 | ||
3319 | return; | |
3320 | } | |
3321 | ||
3322 | static int skd_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
3323 | { | |
3324 | int i; | |
3325 | struct skd_device *skdev; | |
3326 | ||
3327 | skdev = pci_get_drvdata(pdev); | |
3328 | if (!skdev) { | |
f98806d6 | 3329 | dev_err(&pdev->dev, "no device data for PCI\n"); |
e67f86b3 AB |
3330 | return -EIO; |
3331 | } | |
3332 | ||
3333 | skd_stop_device(skdev); | |
3334 | ||
3335 | skd_release_irq(skdev); | |
3336 | ||
3337 | for (i = 0; i < SKD_MAX_BARS; i++) | |
3338 | if (skdev->mem_map[i]) | |
4854afe3 | 3339 | iounmap(skdev->mem_map[i]); |
e67f86b3 AB |
3340 | |
3341 | if (skdev->pcie_error_reporting_is_enabled) | |
3342 | pci_disable_pcie_error_reporting(pdev); | |
3343 | ||
3344 | pci_release_regions(pdev); | |
3345 | pci_save_state(pdev); | |
3346 | pci_disable_device(pdev); | |
3347 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
3348 | return 0; | |
3349 | } | |
3350 | ||
3351 | static int skd_pci_resume(struct pci_dev *pdev) | |
3352 | { | |
3353 | int i; | |
3354 | int rc = 0; | |
3355 | struct skd_device *skdev; | |
3356 | ||
3357 | skdev = pci_get_drvdata(pdev); | |
3358 | if (!skdev) { | |
f98806d6 | 3359 | dev_err(&pdev->dev, "no device data for PCI\n"); |
e67f86b3 AB |
3360 | return -1; |
3361 | } | |
3362 | ||
3363 | pci_set_power_state(pdev, PCI_D0); | |
3364 | pci_enable_wake(pdev, PCI_D0, 0); | |
3365 | pci_restore_state(pdev); | |
3366 | ||
3367 | rc = pci_enable_device(pdev); | |
3368 | if (rc) | |
3369 | return rc; | |
3370 | rc = pci_request_regions(pdev, DRV_NAME); | |
3371 | if (rc) | |
3372 | goto err_out; | |
13812621 CH |
3373 | rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); |
3374 | if (rc) | |
d91dc172 | 3375 | rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
13812621 CH |
3376 | if (rc) { |
3377 | dev_err(&pdev->dev, "DMA mask error %d\n", rc); | |
3378 | goto err_out_regions; | |
e67f86b3 AB |
3379 | } |
3380 | ||
3381 | pci_set_master(pdev); | |
3382 | rc = pci_enable_pcie_error_reporting(pdev); | |
3383 | if (rc) { | |
f98806d6 BVA |
3384 | dev_err(&pdev->dev, |
3385 | "bad enable of PCIe error reporting rc=%d\n", rc); | |
e67f86b3 AB |
3386 | skdev->pcie_error_reporting_is_enabled = 0; |
3387 | } else | |
3388 | skdev->pcie_error_reporting_is_enabled = 1; | |
3389 | ||
3390 | for (i = 0; i < SKD_MAX_BARS; i++) { | |
3391 | ||
3392 | skdev->mem_phys[i] = pci_resource_start(pdev, i); | |
3393 | skdev->mem_size[i] = (u32)pci_resource_len(pdev, i); | |
3394 | skdev->mem_map[i] = ioremap(skdev->mem_phys[i], | |
3395 | skdev->mem_size[i]); | |
3396 | if (!skdev->mem_map[i]) { | |
f98806d6 | 3397 | dev_err(&pdev->dev, "Unable to map adapter memory!\n"); |
e67f86b3 AB |
3398 | rc = -ENODEV; |
3399 | goto err_out_iounmap; | |
3400 | } | |
f98806d6 BVA |
3401 | dev_dbg(&pdev->dev, "mem_map=%p, phyd=%016llx, size=%d\n", |
3402 | skdev->mem_map[i], (uint64_t)skdev->mem_phys[i], | |
3403 | skdev->mem_size[i]); | |
e67f86b3 AB |
3404 | } |
3405 | rc = skd_acquire_irq(skdev); | |
3406 | if (rc) { | |
f98806d6 | 3407 | dev_err(&pdev->dev, "interrupt resource error %d\n", rc); |
e67f86b3 AB |
3408 | goto err_out_iounmap; |
3409 | } | |
3410 | ||
3411 | rc = skd_start_timer(skdev); | |
3412 | if (rc) | |
3413 | goto err_out_timer; | |
3414 | ||
3415 | init_waitqueue_head(&skdev->waitq); | |
3416 | ||
3417 | skd_start_device(skdev); | |
3418 | ||
3419 | return rc; | |
3420 | ||
3421 | err_out_timer: | |
3422 | skd_stop_device(skdev); | |
3423 | skd_release_irq(skdev); | |
3424 | ||
3425 | err_out_iounmap: | |
3426 | for (i = 0; i < SKD_MAX_BARS; i++) | |
3427 | if (skdev->mem_map[i]) | |
3428 | iounmap(skdev->mem_map[i]); | |
3429 | ||
3430 | if (skdev->pcie_error_reporting_is_enabled) | |
3431 | pci_disable_pcie_error_reporting(pdev); | |
3432 | ||
3433 | err_out_regions: | |
3434 | pci_release_regions(pdev); | |
3435 | ||
3436 | err_out: | |
3437 | pci_disable_device(pdev); | |
3438 | return rc; | |
3439 | } | |
3440 | ||
3441 | static void skd_pci_shutdown(struct pci_dev *pdev) | |
3442 | { | |
3443 | struct skd_device *skdev; | |
3444 | ||
f98806d6 | 3445 | dev_err(&pdev->dev, "%s called\n", __func__); |
e67f86b3 AB |
3446 | |
3447 | skdev = pci_get_drvdata(pdev); | |
3448 | if (!skdev) { | |
f98806d6 | 3449 | dev_err(&pdev->dev, "no device data for PCI\n"); |
e67f86b3 AB |
3450 | return; |
3451 | } | |
3452 | ||
f98806d6 | 3453 | dev_err(&pdev->dev, "calling stop\n"); |
e67f86b3 AB |
3454 | skd_stop_device(skdev); |
3455 | } | |
3456 | ||
3457 | static struct pci_driver skd_driver = { | |
3458 | .name = DRV_NAME, | |
3459 | .id_table = skd_pci_tbl, | |
3460 | .probe = skd_pci_probe, | |
3461 | .remove = skd_pci_remove, | |
3462 | .suspend = skd_pci_suspend, | |
3463 | .resume = skd_pci_resume, | |
3464 | .shutdown = skd_pci_shutdown, | |
3465 | }; | |
3466 | ||
3467 | /* | |
3468 | ***************************************************************************** | |
3469 | * LOGGING SUPPORT | |
3470 | ***************************************************************************** | |
3471 | */ | |
3472 | ||
e67f86b3 AB |
3473 | const char *skd_drive_state_to_str(int state) |
3474 | { | |
3475 | switch (state) { | |
3476 | case FIT_SR_DRIVE_OFFLINE: | |
3477 | return "OFFLINE"; | |
3478 | case FIT_SR_DRIVE_INIT: | |
3479 | return "INIT"; | |
3480 | case FIT_SR_DRIVE_ONLINE: | |
3481 | return "ONLINE"; | |
3482 | case FIT_SR_DRIVE_BUSY: | |
3483 | return "BUSY"; | |
3484 | case FIT_SR_DRIVE_FAULT: | |
3485 | return "FAULT"; | |
3486 | case FIT_SR_DRIVE_DEGRADED: | |
3487 | return "DEGRADED"; | |
3488 | case FIT_SR_PCIE_LINK_DOWN: | |
3489 | return "INK_DOWN"; | |
3490 | case FIT_SR_DRIVE_SOFT_RESET: | |
3491 | return "SOFT_RESET"; | |
3492 | case FIT_SR_DRIVE_NEED_FW_DOWNLOAD: | |
3493 | return "NEED_FW"; | |
3494 | case FIT_SR_DRIVE_INIT_FAULT: | |
3495 | return "INIT_FAULT"; | |
3496 | case FIT_SR_DRIVE_BUSY_SANITIZE: | |
3497 | return "BUSY_SANITIZE"; | |
3498 | case FIT_SR_DRIVE_BUSY_ERASE: | |
3499 | return "BUSY_ERASE"; | |
3500 | case FIT_SR_DRIVE_FW_BOOTING: | |
3501 | return "FW_BOOTING"; | |
3502 | default: | |
3503 | return "???"; | |
3504 | } | |
3505 | } | |
3506 | ||
3507 | const char *skd_skdev_state_to_str(enum skd_drvr_state state) | |
3508 | { | |
3509 | switch (state) { | |
3510 | case SKD_DRVR_STATE_LOAD: | |
3511 | return "LOAD"; | |
3512 | case SKD_DRVR_STATE_IDLE: | |
3513 | return "IDLE"; | |
3514 | case SKD_DRVR_STATE_BUSY: | |
3515 | return "BUSY"; | |
3516 | case SKD_DRVR_STATE_STARTING: | |
3517 | return "STARTING"; | |
3518 | case SKD_DRVR_STATE_ONLINE: | |
3519 | return "ONLINE"; | |
3520 | case SKD_DRVR_STATE_PAUSING: | |
3521 | return "PAUSING"; | |
3522 | case SKD_DRVR_STATE_PAUSED: | |
3523 | return "PAUSED"; | |
e67f86b3 AB |
3524 | case SKD_DRVR_STATE_RESTARTING: |
3525 | return "RESTARTING"; | |
3526 | case SKD_DRVR_STATE_RESUMING: | |
3527 | return "RESUMING"; | |
3528 | case SKD_DRVR_STATE_STOPPING: | |
3529 | return "STOPPING"; | |
3530 | case SKD_DRVR_STATE_SYNCING: | |
3531 | return "SYNCING"; | |
3532 | case SKD_DRVR_STATE_FAULT: | |
3533 | return "FAULT"; | |
3534 | case SKD_DRVR_STATE_DISAPPEARED: | |
3535 | return "DISAPPEARED"; | |
3536 | case SKD_DRVR_STATE_BUSY_ERASE: | |
3537 | return "BUSY_ERASE"; | |
3538 | case SKD_DRVR_STATE_BUSY_SANITIZE: | |
3539 | return "BUSY_SANITIZE"; | |
3540 | case SKD_DRVR_STATE_BUSY_IMMINENT: | |
3541 | return "BUSY_IMMINENT"; | |
3542 | case SKD_DRVR_STATE_WAIT_BOOT: | |
3543 | return "WAIT_BOOT"; | |
3544 | ||
3545 | default: | |
3546 | return "???"; | |
3547 | } | |
3548 | } | |
3549 | ||
a26ba7fa | 3550 | static const char *skd_skreq_state_to_str(enum skd_req_state state) |
e67f86b3 AB |
3551 | { |
3552 | switch (state) { | |
3553 | case SKD_REQ_STATE_IDLE: | |
3554 | return "IDLE"; | |
3555 | case SKD_REQ_STATE_SETUP: | |
3556 | return "SETUP"; | |
3557 | case SKD_REQ_STATE_BUSY: | |
3558 | return "BUSY"; | |
3559 | case SKD_REQ_STATE_COMPLETED: | |
3560 | return "COMPLETED"; | |
3561 | case SKD_REQ_STATE_TIMEOUT: | |
3562 | return "TIMEOUT"; | |
e67f86b3 AB |
3563 | default: |
3564 | return "???"; | |
3565 | } | |
3566 | } | |
3567 | ||
3568 | static void skd_log_skdev(struct skd_device *skdev, const char *event) | |
3569 | { | |
f98806d6 BVA |
3570 | dev_dbg(&skdev->pdev->dev, "skdev=%p event='%s'\n", skdev, event); |
3571 | dev_dbg(&skdev->pdev->dev, " drive_state=%s(%d) driver_state=%s(%d)\n", | |
3572 | skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, | |
3573 | skd_skdev_state_to_str(skdev->state), skdev->state); | |
3574 | dev_dbg(&skdev->pdev->dev, " busy=%d limit=%d dev=%d lowat=%d\n", | |
d4d0f5fc | 3575 | skd_in_flight(skdev), skdev->cur_max_queue_depth, |
f98806d6 | 3576 | skdev->dev_max_queue_depth, skdev->queue_low_water_mark); |
a74d5b76 BVA |
3577 | dev_dbg(&skdev->pdev->dev, " cycle=%d cycle_ix=%d\n", |
3578 | skdev->skcomp_cycle, skdev->skcomp_ix); | |
e67f86b3 AB |
3579 | } |
3580 | ||
e67f86b3 AB |
3581 | static void skd_log_skreq(struct skd_device *skdev, |
3582 | struct skd_request_context *skreq, const char *event) | |
3583 | { | |
e7278a8b BVA |
3584 | struct request *req = blk_mq_rq_from_pdu(skreq); |
3585 | u32 lba = blk_rq_pos(req); | |
3586 | u32 count = blk_rq_sectors(req); | |
3587 | ||
f98806d6 BVA |
3588 | dev_dbg(&skdev->pdev->dev, "skreq=%p event='%s'\n", skreq, event); |
3589 | dev_dbg(&skdev->pdev->dev, " state=%s(%d) id=0x%04x fitmsg=0x%04x\n", | |
3590 | skd_skreq_state_to_str(skreq->state), skreq->state, skreq->id, | |
3591 | skreq->fitmsg_id); | |
a74d5b76 BVA |
3592 | dev_dbg(&skdev->pdev->dev, " sg_dir=%d n_sg=%d\n", |
3593 | skreq->data_dir, skreq->n_sg); | |
ca33dd92 | 3594 | |
e7278a8b BVA |
3595 | dev_dbg(&skdev->pdev->dev, |
3596 | "req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", req, lba, lba, | |
3597 | count, count, (int)rq_data_dir(req)); | |
e67f86b3 AB |
3598 | } |
3599 | ||
3600 | /* | |
3601 | ***************************************************************************** | |
3602 | * MODULE GLUE | |
3603 | ***************************************************************************** | |
3604 | */ | |
3605 | ||
3606 | static int __init skd_init(void) | |
3607 | { | |
16a70534 BVA |
3608 | BUILD_BUG_ON(sizeof(struct fit_completion_entry_v1) != 8); |
3609 | BUILD_BUG_ON(sizeof(struct fit_comp_error_info) != 32); | |
3610 | BUILD_BUG_ON(sizeof(struct skd_command_header) != 16); | |
3611 | BUILD_BUG_ON(sizeof(struct skd_scsi_request) != 32); | |
3612 | BUILD_BUG_ON(sizeof(struct driver_inquiry_data) != 44); | |
d891fe60 BVA |
3613 | BUILD_BUG_ON(offsetof(struct skd_msg_buf, fmh) != 0); |
3614 | BUILD_BUG_ON(offsetof(struct skd_msg_buf, scsi) != 64); | |
3615 | BUILD_BUG_ON(sizeof(struct skd_msg_buf) != SKD_N_FITMSG_BYTES); | |
2da7b403 | 3616 | |
e67f86b3 AB |
3617 | switch (skd_isr_type) { |
3618 | case SKD_IRQ_LEGACY: | |
3619 | case SKD_IRQ_MSI: | |
3620 | case SKD_IRQ_MSIX: | |
3621 | break; | |
3622 | default: | |
fbed149a | 3623 | pr_err(PFX "skd_isr_type %d invalid, re-set to %d\n", |
e67f86b3 AB |
3624 | skd_isr_type, SKD_IRQ_DEFAULT); |
3625 | skd_isr_type = SKD_IRQ_DEFAULT; | |
3626 | } | |
3627 | ||
fbed149a BZ |
3628 | if (skd_max_queue_depth < 1 || |
3629 | skd_max_queue_depth > SKD_MAX_QUEUE_DEPTH) { | |
3630 | pr_err(PFX "skd_max_queue_depth %d invalid, re-set to %d\n", | |
e67f86b3 AB |
3631 | skd_max_queue_depth, SKD_MAX_QUEUE_DEPTH_DEFAULT); |
3632 | skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; | |
3633 | } | |
3634 | ||
2da7b403 BVA |
3635 | if (skd_max_req_per_msg < 1 || |
3636 | skd_max_req_per_msg > SKD_MAX_REQ_PER_MSG) { | |
fbed149a | 3637 | pr_err(PFX "skd_max_req_per_msg %d invalid, re-set to %d\n", |
e67f86b3 AB |
3638 | skd_max_req_per_msg, SKD_MAX_REQ_PER_MSG_DEFAULT); |
3639 | skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; | |
3640 | } | |
3641 | ||
3642 | if (skd_sgs_per_request < 1 || skd_sgs_per_request > 4096) { | |
fbed149a | 3643 | pr_err(PFX "skd_sg_per_request %d invalid, re-set to %d\n", |
e67f86b3 AB |
3644 | skd_sgs_per_request, SKD_N_SG_PER_REQ_DEFAULT); |
3645 | skd_sgs_per_request = SKD_N_SG_PER_REQ_DEFAULT; | |
3646 | } | |
3647 | ||
3648 | if (skd_dbg_level < 0 || skd_dbg_level > 2) { | |
fbed149a | 3649 | pr_err(PFX "skd_dbg_level %d invalid, re-set to %d\n", |
e67f86b3 AB |
3650 | skd_dbg_level, 0); |
3651 | skd_dbg_level = 0; | |
3652 | } | |
3653 | ||
3654 | if (skd_isr_comp_limit < 0) { | |
fbed149a | 3655 | pr_err(PFX "skd_isr_comp_limit %d invalid, set to %d\n", |
e67f86b3 AB |
3656 | skd_isr_comp_limit, 0); |
3657 | skd_isr_comp_limit = 0; | |
3658 | } | |
3659 | ||
b8df6647 | 3660 | return pci_register_driver(&skd_driver); |
e67f86b3 AB |
3661 | } |
3662 | ||
3663 | static void __exit skd_exit(void) | |
3664 | { | |
e67f86b3 | 3665 | pci_unregister_driver(&skd_driver); |
b8df6647 BZ |
3666 | |
3667 | if (skd_major) | |
3668 | unregister_blkdev(skd_major, DRV_NAME); | |
e67f86b3 AB |
3669 | } |
3670 | ||
e67f86b3 AB |
3671 | module_init(skd_init); |
3672 | module_exit(skd_exit); |