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hpsa: do not use function pointers in fast path command submission
[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / hpsa.h
1 /*
2 * Disk Array driver for HP Smart Array SAS controllers
3 * Copyright 2000, 2014 Hewlett-Packard Development Company, L.P.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
12 * NON INFRINGEMENT. See the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 *
18 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
19 *
20 */
21 #ifndef HPSA_H
22 #define HPSA_H
23
24 #include <scsi/scsicam.h>
25
26 #define IO_OK 0
27 #define IO_ERROR 1
28
29 struct ctlr_info;
30
31 struct access_method {
32 void (*submit_command)(struct ctlr_info *h,
33 struct CommandList *c);
34 void (*set_intr_mask)(struct ctlr_info *h, unsigned long val);
35 bool (*intr_pending)(struct ctlr_info *h);
36 unsigned long (*command_completed)(struct ctlr_info *h, u8 q);
37 };
38
39 struct hpsa_scsi_dev_t {
40 int devtype;
41 int bus, target, lun; /* as presented to the OS */
42 unsigned char scsi3addr[8]; /* as presented to the HW */
43 #define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"
44 unsigned char device_id[16]; /* from inquiry pg. 0x83 */
45 unsigned char vendor[8]; /* bytes 8-15 of inquiry data */
46 unsigned char model[16]; /* bytes 16-31 of inquiry data */
47 unsigned char raid_level; /* from inquiry page 0xC1 */
48 unsigned char volume_offline; /* discovered via TUR or VPD */
49 u16 queue_depth; /* max queue_depth for this device */
50 atomic_t ioaccel_cmds_out; /* Only used for physical devices
51 * counts commands sent to physical
52 * device via "ioaccel" path.
53 */
54 u32 ioaccel_handle;
55 int offload_config; /* I/O accel RAID offload configured */
56 int offload_enabled; /* I/O accel RAID offload enabled */
57 int offload_to_mirror; /* Send next I/O accelerator RAID
58 * offload request to mirror drive
59 */
60 struct raid_map_data raid_map; /* I/O accelerator RAID map */
61
62 /*
63 * Pointers from logical drive map indices to the phys drives that
64 * make those logical drives. Note, multiple logical drives may
65 * share physical drives. You can have for instance 5 physical
66 * drives with 3 logical drives each using those same 5 physical
67 * disks. We need these pointers for counting i/o's out to physical
68 * devices in order to honor physical device queue depth limits.
69 */
70 struct hpsa_scsi_dev_t *phys_disk[RAID_MAP_MAX_ENTRIES];
71 };
72
73 struct reply_queue_buffer {
74 u64 *head;
75 size_t size;
76 u8 wraparound;
77 u32 current_entry;
78 dma_addr_t busaddr;
79 };
80
81 #pragma pack(1)
82 struct bmic_controller_parameters {
83 u8 led_flags;
84 u8 enable_command_list_verification;
85 u8 backed_out_write_drives;
86 u16 stripes_for_parity;
87 u8 parity_distribution_mode_flags;
88 u16 max_driver_requests;
89 u16 elevator_trend_count;
90 u8 disable_elevator;
91 u8 force_scan_complete;
92 u8 scsi_transfer_mode;
93 u8 force_narrow;
94 u8 rebuild_priority;
95 u8 expand_priority;
96 u8 host_sdb_asic_fix;
97 u8 pdpi_burst_from_host_disabled;
98 char software_name[64];
99 char hardware_name[32];
100 u8 bridge_revision;
101 u8 snapshot_priority;
102 u32 os_specific;
103 u8 post_prompt_timeout;
104 u8 automatic_drive_slamming;
105 u8 reserved1;
106 u8 nvram_flags;
107 #define HBA_MODE_ENABLED_FLAG (1 << 3)
108 u8 cache_nvram_flags;
109 u8 drive_config_flags;
110 u16 reserved2;
111 u8 temp_warning_level;
112 u8 temp_shutdown_level;
113 u8 temp_condition_reset;
114 u8 max_coalesce_commands;
115 u32 max_coalesce_delay;
116 u8 orca_password[4];
117 u8 access_id[16];
118 u8 reserved[356];
119 };
120 #pragma pack()
121
122 struct ctlr_info {
123 int ctlr;
124 char devname[8];
125 char *product_name;
126 struct pci_dev *pdev;
127 u32 board_id;
128 void __iomem *vaddr;
129 unsigned long paddr;
130 int nr_cmds; /* Number of commands allowed on this controller */
131 #define HPSA_CMDS_RESERVED_FOR_ABORTS 2
132 #define HPSA_CMDS_RESERVED_FOR_DRIVER 1
133 struct CfgTable __iomem *cfgtable;
134 int interrupts_enabled;
135 int max_commands;
136 int last_allocation;
137 atomic_t commands_outstanding;
138 # define PERF_MODE_INT 0
139 # define DOORBELL_INT 1
140 # define SIMPLE_MODE_INT 2
141 # define MEMQ_MODE_INT 3
142 unsigned int intr[MAX_REPLY_QUEUES];
143 unsigned int msix_vector;
144 unsigned int msi_vector;
145 int intr_mode; /* either PERF_MODE_INT or SIMPLE_MODE_INT */
146 struct access_method access;
147 char hba_mode_enabled;
148
149 /* queue and queue Info */
150 unsigned int Qdepth;
151 unsigned int maxSG;
152 spinlock_t lock;
153 int maxsgentries;
154 u8 max_cmd_sg_entries;
155 int chainsize;
156 struct SGDescriptor **cmd_sg_list;
157
158 /* pointers to command and error info pool */
159 struct CommandList *cmd_pool;
160 dma_addr_t cmd_pool_dhandle;
161 struct io_accel1_cmd *ioaccel_cmd_pool;
162 dma_addr_t ioaccel_cmd_pool_dhandle;
163 struct io_accel2_cmd *ioaccel2_cmd_pool;
164 dma_addr_t ioaccel2_cmd_pool_dhandle;
165 struct ErrorInfo *errinfo_pool;
166 dma_addr_t errinfo_pool_dhandle;
167 unsigned long *cmd_pool_bits;
168 int scan_finished;
169 spinlock_t scan_lock;
170 wait_queue_head_t scan_wait_queue;
171
172 struct Scsi_Host *scsi_host;
173 spinlock_t devlock; /* to protect hba[ctlr]->dev[]; */
174 int ndevices; /* number of used elements in .dev[] array. */
175 struct hpsa_scsi_dev_t *dev[HPSA_MAX_DEVICES];
176 /*
177 * Performant mode tables.
178 */
179 u32 trans_support;
180 u32 trans_offset;
181 struct TransTable_struct __iomem *transtable;
182 unsigned long transMethod;
183
184 /* cap concurrent passthrus at some reasonable maximum */
185 #define HPSA_MAX_CONCURRENT_PASSTHRUS (10)
186 atomic_t passthru_cmds_avail;
187
188 /*
189 * Performant mode completion buffers
190 */
191 size_t reply_queue_size;
192 struct reply_queue_buffer reply_queue[MAX_REPLY_QUEUES];
193 u8 nreply_queues;
194 u32 *blockFetchTable;
195 u32 *ioaccel1_blockFetchTable;
196 u32 *ioaccel2_blockFetchTable;
197 u32 __iomem *ioaccel2_bft2_regs;
198 unsigned char *hba_inquiry_data;
199 u32 driver_support;
200 u32 fw_support;
201 int ioaccel_support;
202 int ioaccel_maxsg;
203 u64 last_intr_timestamp;
204 u32 last_heartbeat;
205 u64 last_heartbeat_timestamp;
206 u32 heartbeat_sample_interval;
207 atomic_t firmware_flash_in_progress;
208 u32 __percpu *lockup_detected;
209 struct delayed_work monitor_ctlr_work;
210 int remove_in_progress;
211 /* Address of h->q[x] is passed to intr handler to know which queue */
212 u8 q[MAX_REPLY_QUEUES];
213 u32 TMFSupportFlags; /* cache what task mgmt funcs are supported. */
214 #define HPSATMF_BITS_SUPPORTED (1 << 0)
215 #define HPSATMF_PHYS_LUN_RESET (1 << 1)
216 #define HPSATMF_PHYS_NEX_RESET (1 << 2)
217 #define HPSATMF_PHYS_TASK_ABORT (1 << 3)
218 #define HPSATMF_PHYS_TSET_ABORT (1 << 4)
219 #define HPSATMF_PHYS_CLEAR_ACA (1 << 5)
220 #define HPSATMF_PHYS_CLEAR_TSET (1 << 6)
221 #define HPSATMF_PHYS_QRY_TASK (1 << 7)
222 #define HPSATMF_PHYS_QRY_TSET (1 << 8)
223 #define HPSATMF_PHYS_QRY_ASYNC (1 << 9)
224 #define HPSATMF_MASK_SUPPORTED (1 << 16)
225 #define HPSATMF_LOG_LUN_RESET (1 << 17)
226 #define HPSATMF_LOG_NEX_RESET (1 << 18)
227 #define HPSATMF_LOG_TASK_ABORT (1 << 19)
228 #define HPSATMF_LOG_TSET_ABORT (1 << 20)
229 #define HPSATMF_LOG_CLEAR_ACA (1 << 21)
230 #define HPSATMF_LOG_CLEAR_TSET (1 << 22)
231 #define HPSATMF_LOG_QRY_TASK (1 << 23)
232 #define HPSATMF_LOG_QRY_TSET (1 << 24)
233 #define HPSATMF_LOG_QRY_ASYNC (1 << 25)
234 u32 events;
235 #define CTLR_STATE_CHANGE_EVENT (1 << 0)
236 #define CTLR_ENCLOSURE_HOT_PLUG_EVENT (1 << 1)
237 #define CTLR_STATE_CHANGE_EVENT_PHYSICAL_DRV (1 << 4)
238 #define CTLR_STATE_CHANGE_EVENT_LOGICAL_DRV (1 << 5)
239 #define CTLR_STATE_CHANGE_EVENT_REDUNDANT_CNTRL (1 << 6)
240 #define CTLR_STATE_CHANGE_EVENT_AIO_ENABLED_DISABLED (1 << 30)
241 #define CTLR_STATE_CHANGE_EVENT_AIO_CONFIG_CHANGE (1 << 31)
242
243 #define RESCAN_REQUIRED_EVENT_BITS \
244 (CTLR_ENCLOSURE_HOT_PLUG_EVENT | \
245 CTLR_STATE_CHANGE_EVENT_PHYSICAL_DRV | \
246 CTLR_STATE_CHANGE_EVENT_LOGICAL_DRV | \
247 CTLR_STATE_CHANGE_EVENT_AIO_ENABLED_DISABLED | \
248 CTLR_STATE_CHANGE_EVENT_AIO_CONFIG_CHANGE)
249 spinlock_t offline_device_lock;
250 struct list_head offline_device_list;
251 int acciopath_status;
252 int raid_offload_debug;
253 struct workqueue_struct *resubmit_wq;
254 };
255
256 struct offline_device_entry {
257 unsigned char scsi3addr[8];
258 struct list_head offline_list;
259 };
260
261 #define HPSA_ABORT_MSG 0
262 #define HPSA_DEVICE_RESET_MSG 1
263 #define HPSA_RESET_TYPE_CONTROLLER 0x00
264 #define HPSA_RESET_TYPE_BUS 0x01
265 #define HPSA_RESET_TYPE_TARGET 0x03
266 #define HPSA_RESET_TYPE_LUN 0x04
267 #define HPSA_MSG_SEND_RETRY_LIMIT 10
268 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS (10000)
269
270 /* Maximum time in seconds driver will wait for command completions
271 * when polling before giving up.
272 */
273 #define HPSA_MAX_POLL_TIME_SECS (20)
274
275 /* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines
276 * how many times to retry TEST UNIT READY on a device
277 * while waiting for it to become ready before giving up.
278 * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval
279 * between sending TURs while waiting for a device
280 * to become ready.
281 */
282 #define HPSA_TUR_RETRY_LIMIT (20)
283 #define HPSA_MAX_WAIT_INTERVAL_SECS (30)
284
285 /* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board
286 * to become ready, in seconds, before giving up on it.
287 * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
288 * between polling the board to see if it is ready, in
289 * milliseconds. HPSA_BOARD_READY_POLL_INTERVAL and
290 * HPSA_BOARD_READY_ITERATIONS are derived from those.
291 */
292 #define HPSA_BOARD_READY_WAIT_SECS (120)
293 #define HPSA_BOARD_NOT_READY_WAIT_SECS (100)
294 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
295 #define HPSA_BOARD_READY_POLL_INTERVAL \
296 ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
297 #define HPSA_BOARD_READY_ITERATIONS \
298 ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
299 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
300 #define HPSA_BOARD_NOT_READY_ITERATIONS \
301 ((HPSA_BOARD_NOT_READY_WAIT_SECS * 1000) / \
302 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
303 #define HPSA_POST_RESET_PAUSE_MSECS (3000)
304 #define HPSA_POST_RESET_NOOP_RETRIES (12)
305
306 /* Defining the diffent access_menthods */
307 /*
308 * Memory mapped FIFO interface (SMART 53xx cards)
309 */
310 #define SA5_DOORBELL 0x20
311 #define SA5_REQUEST_PORT_OFFSET 0x40
312 #define SA5_REQUEST_PORT64_LO_OFFSET 0xC0
313 #define SA5_REQUEST_PORT64_HI_OFFSET 0xC4
314 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
315 #define SA5_REPLY_PORT_OFFSET 0x44
316 #define SA5_INTR_STATUS 0x30
317 #define SA5_SCRATCHPAD_OFFSET 0xB0
318
319 #define SA5_CTCFG_OFFSET 0xB4
320 #define SA5_CTMEM_OFFSET 0xB8
321
322 #define SA5_INTR_OFF 0x08
323 #define SA5B_INTR_OFF 0x04
324 #define SA5_INTR_PENDING 0x08
325 #define SA5B_INTR_PENDING 0x04
326 #define FIFO_EMPTY 0xffffffff
327 #define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
328
329 #define HPSA_ERROR_BIT 0x02
330
331 /* Performant mode flags */
332 #define SA5_PERF_INTR_PENDING 0x04
333 #define SA5_PERF_INTR_OFF 0x05
334 #define SA5_OUTDB_STATUS_PERF_BIT 0x01
335 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
336 #define SA5_OUTDB_CLEAR 0xA0
337 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
338 #define SA5_OUTDB_STATUS 0x9C
339
340
341 #define HPSA_INTR_ON 1
342 #define HPSA_INTR_OFF 0
343
344 /*
345 * Inbound Post Queue offsets for IO Accelerator Mode 2
346 */
347 #define IOACCEL2_INBOUND_POSTQ_32 0x48
348 #define IOACCEL2_INBOUND_POSTQ_64_LOW 0xd0
349 #define IOACCEL2_INBOUND_POSTQ_64_HI 0xd4
350
351 /*
352 Send the command to the hardware
353 */
354 static void SA5_submit_command(struct ctlr_info *h,
355 struct CommandList *c)
356 {
357 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
358 (void) readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
359 }
360
361 static void SA5_submit_command_no_read(struct ctlr_info *h,
362 struct CommandList *c)
363 {
364 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
365 }
366
367 static void SA5_submit_command_ioaccel2(struct ctlr_info *h,
368 struct CommandList *c)
369 {
370 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
371 }
372
373 /*
374 * This card is the opposite of the other cards.
375 * 0 turns interrupts on...
376 * 0x08 turns them off...
377 */
378 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
379 {
380 if (val) { /* Turn interrupts on */
381 h->interrupts_enabled = 1;
382 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
383 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
384 } else { /* Turn them off */
385 h->interrupts_enabled = 0;
386 writel(SA5_INTR_OFF,
387 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
388 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
389 }
390 }
391
392 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
393 {
394 if (val) { /* turn on interrupts */
395 h->interrupts_enabled = 1;
396 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
397 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
398 } else {
399 h->interrupts_enabled = 0;
400 writel(SA5_PERF_INTR_OFF,
401 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
402 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
403 }
404 }
405
406 static unsigned long SA5_performant_completed(struct ctlr_info *h, u8 q)
407 {
408 struct reply_queue_buffer *rq = &h->reply_queue[q];
409 unsigned long register_value = FIFO_EMPTY;
410
411 /* msi auto clears the interrupt pending bit. */
412 if (unlikely(!(h->msi_vector || h->msix_vector))) {
413 /* flush the controller write of the reply queue by reading
414 * outbound doorbell status register.
415 */
416 (void) readl(h->vaddr + SA5_OUTDB_STATUS);
417 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
418 /* Do a read in order to flush the write to the controller
419 * (as per spec.)
420 */
421 (void) readl(h->vaddr + SA5_OUTDB_STATUS);
422 }
423
424 if ((((u32) rq->head[rq->current_entry]) & 1) == rq->wraparound) {
425 register_value = rq->head[rq->current_entry];
426 rq->current_entry++;
427 atomic_dec(&h->commands_outstanding);
428 } else {
429 register_value = FIFO_EMPTY;
430 }
431 /* Check for wraparound */
432 if (rq->current_entry == h->max_commands) {
433 rq->current_entry = 0;
434 rq->wraparound ^= 1;
435 }
436 return register_value;
437 }
438
439 /*
440 * returns value read from hardware.
441 * returns FIFO_EMPTY if there is nothing to read
442 */
443 static unsigned long SA5_completed(struct ctlr_info *h,
444 __attribute__((unused)) u8 q)
445 {
446 unsigned long register_value
447 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
448
449 if (register_value != FIFO_EMPTY)
450 atomic_dec(&h->commands_outstanding);
451
452 #ifdef HPSA_DEBUG
453 if (register_value != FIFO_EMPTY)
454 dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
455 register_value);
456 else
457 dev_dbg(&h->pdev->dev, "FIFO Empty read\n");
458 #endif
459
460 return register_value;
461 }
462 /*
463 * Returns true if an interrupt is pending..
464 */
465 static bool SA5_intr_pending(struct ctlr_info *h)
466 {
467 unsigned long register_value =
468 readl(h->vaddr + SA5_INTR_STATUS);
469 return register_value & SA5_INTR_PENDING;
470 }
471
472 static bool SA5_performant_intr_pending(struct ctlr_info *h)
473 {
474 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
475
476 if (!register_value)
477 return false;
478
479 /* Read outbound doorbell to flush */
480 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
481 return register_value & SA5_OUTDB_STATUS_PERF_BIT;
482 }
483
484 #define SA5_IOACCEL_MODE1_INTR_STATUS_CMP_BIT 0x100
485
486 static bool SA5_ioaccel_mode1_intr_pending(struct ctlr_info *h)
487 {
488 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
489
490 return (register_value & SA5_IOACCEL_MODE1_INTR_STATUS_CMP_BIT) ?
491 true : false;
492 }
493
494 #define IOACCEL_MODE1_REPLY_QUEUE_INDEX 0x1A0
495 #define IOACCEL_MODE1_PRODUCER_INDEX 0x1B8
496 #define IOACCEL_MODE1_CONSUMER_INDEX 0x1BC
497 #define IOACCEL_MODE1_REPLY_UNUSED 0xFFFFFFFFFFFFFFFFULL
498
499 static unsigned long SA5_ioaccel_mode1_completed(struct ctlr_info *h, u8 q)
500 {
501 u64 register_value;
502 struct reply_queue_buffer *rq = &h->reply_queue[q];
503
504 BUG_ON(q >= h->nreply_queues);
505
506 register_value = rq->head[rq->current_entry];
507 if (register_value != IOACCEL_MODE1_REPLY_UNUSED) {
508 rq->head[rq->current_entry] = IOACCEL_MODE1_REPLY_UNUSED;
509 if (++rq->current_entry == rq->size)
510 rq->current_entry = 0;
511 /*
512 * @todo
513 *
514 * Don't really need to write the new index after each command,
515 * but with current driver design this is easiest.
516 */
517 wmb();
518 writel((q << 24) | rq->current_entry, h->vaddr +
519 IOACCEL_MODE1_CONSUMER_INDEX);
520 atomic_dec(&h->commands_outstanding);
521 }
522 return (unsigned long) register_value;
523 }
524
525 static struct access_method SA5_access = {
526 SA5_submit_command,
527 SA5_intr_mask,
528 SA5_intr_pending,
529 SA5_completed,
530 };
531
532 static struct access_method SA5_ioaccel_mode1_access = {
533 SA5_submit_command,
534 SA5_performant_intr_mask,
535 SA5_ioaccel_mode1_intr_pending,
536 SA5_ioaccel_mode1_completed,
537 };
538
539 static struct access_method SA5_ioaccel_mode2_access = {
540 SA5_submit_command_ioaccel2,
541 SA5_performant_intr_mask,
542 SA5_performant_intr_pending,
543 SA5_performant_completed,
544 };
545
546 static struct access_method SA5_performant_access = {
547 SA5_submit_command,
548 SA5_performant_intr_mask,
549 SA5_performant_intr_pending,
550 SA5_performant_completed,
551 };
552
553 static struct access_method SA5_performant_access_no_read = {
554 SA5_submit_command_no_read,
555 SA5_performant_intr_mask,
556 SA5_performant_intr_pending,
557 SA5_performant_completed,
558 };
559
560 struct board_type {
561 u32 board_id;
562 char *product_name;
563 struct access_method *access;
564 };
565
566 #endif /* HPSA_H */
567
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