1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  *    driver for Microchip PQI-based storage controllers
4  *    Copyright (c) 2019-2022 Microchip Technology Inc. and its subsidiaries
5  *    Copyright (c) 2016-2018 Microsemi Corporation
6  *    Copyright (c) 2016 PMC-Sierra, Inc.
7  *
8  *    Questions/Comments/Bugfixes to storagedev@microchip.com
9  *
10  */
11 
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/pci.h>
15 #include <linux/delay.h>
16 #include <linux/interrupt.h>
17 #include <linux/sched.h>
18 #include <linux/rtc.h>
19 #include <linux/bcd.h>
20 #include <linux/reboot.h>
21 #include <linux/cciss_ioctl.h>
22 #include <linux/blk-mq-pci.h>
23 #include <scsi/scsi_host.h>
24 #include <scsi/scsi_cmnd.h>
25 #include <scsi/scsi_device.h>
26 #include <scsi/scsi_eh.h>
27 #include <scsi/scsi_transport_sas.h>
28 #include <asm/unaligned.h>
29 #include "smartpqi.h"
30 #include "smartpqi_sis.h"
31 
32 #if !defined(BUILD_TIMESTAMP)
33 #define BUILD_TIMESTAMP
34 #endif
35 
36 #define DRIVER_VERSION		"2.1.18-045"
37 #define DRIVER_MAJOR		2
38 #define DRIVER_MINOR		1
39 #define DRIVER_RELEASE		18
40 #define DRIVER_REVISION		45
41 
42 #define DRIVER_NAME		"Microchip SmartPQI Driver (v" \
43 				DRIVER_VERSION BUILD_TIMESTAMP ")"
44 #define DRIVER_NAME_SHORT	"smartpqi"
45 
46 #define PQI_EXTRA_SGL_MEMORY	(12 * sizeof(struct pqi_sg_descriptor))
47 
48 #define PQI_POST_RESET_DELAY_SECS			5
49 #define PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS	10
50 
51 MODULE_AUTHOR("Microchip");
52 MODULE_DESCRIPTION("Driver for Microchip Smart Family Controller version "
53 	DRIVER_VERSION);
54 MODULE_VERSION(DRIVER_VERSION);
55 MODULE_LICENSE("GPL");
56 
57 struct pqi_cmd_priv {
58 	int this_residual;
59 };
60 
61 static struct pqi_cmd_priv *pqi_cmd_priv(struct scsi_cmnd *cmd)
62 {
63 	return scsi_cmd_priv(cmd);
64 }
65 
66 static void pqi_verify_structures(void);
67 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
68 	enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason);
69 static void pqi_ctrl_offline_worker(struct work_struct *work);
70 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
71 static void pqi_scan_start(struct Scsi_Host *shost);
72 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
73 	struct pqi_queue_group *queue_group, enum pqi_io_path path,
74 	struct pqi_io_request *io_request);
75 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
76 	struct pqi_iu_header *request, unsigned int flags,
77 	struct pqi_raid_error_info *error_info);
78 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
79 	struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
80 	unsigned int cdb_length, struct pqi_queue_group *queue_group,
81 	struct pqi_encryption_info *encryption_info, bool raid_bypass, bool io_high_prio);
82 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
83 	struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
84 	struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
85 	struct pqi_scsi_dev_raid_map_data *rmd);
86 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
87 	struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
88 	struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
89 	struct pqi_scsi_dev_raid_map_data *rmd);
90 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
91 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
92 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs);
93 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info);
94 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
95 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
96 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
97 	struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs);
98 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info);
99 
100 /* for flags argument to pqi_submit_raid_request_synchronous() */
101 #define PQI_SYNC_FLAGS_INTERRUPTABLE	0x1
102 
103 static struct scsi_transport_template *pqi_sas_transport_template;
104 
105 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
106 
107 enum pqi_lockup_action {
108 	NONE,
109 	REBOOT,
110 	PANIC
111 };
112 
113 static enum pqi_lockup_action pqi_lockup_action = NONE;
114 
115 static struct {
116 	enum pqi_lockup_action	action;
117 	char			*name;
118 } pqi_lockup_actions[] = {
119 	{
120 		.action = NONE,
121 		.name = "none",
122 	},
123 	{
124 		.action = REBOOT,
125 		.name = "reboot",
126 	},
127 	{
128 		.action = PANIC,
129 		.name = "panic",
130 	},
131 };
132 
133 static unsigned int pqi_supported_event_types[] = {
134 	PQI_EVENT_TYPE_HOTPLUG,
135 	PQI_EVENT_TYPE_HARDWARE,
136 	PQI_EVENT_TYPE_PHYSICAL_DEVICE,
137 	PQI_EVENT_TYPE_LOGICAL_DEVICE,
138 	PQI_EVENT_TYPE_OFA,
139 	PQI_EVENT_TYPE_AIO_STATE_CHANGE,
140 	PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
141 };
142 
143 static int pqi_disable_device_id_wildcards;
144 module_param_named(disable_device_id_wildcards,
145 	pqi_disable_device_id_wildcards, int, 0644);
146 MODULE_PARM_DESC(disable_device_id_wildcards,
147 	"Disable device ID wildcards.");
148 
149 static int pqi_disable_heartbeat;
150 module_param_named(disable_heartbeat,
151 	pqi_disable_heartbeat, int, 0644);
152 MODULE_PARM_DESC(disable_heartbeat,
153 	"Disable heartbeat.");
154 
155 static int pqi_disable_ctrl_shutdown;
156 module_param_named(disable_ctrl_shutdown,
157 	pqi_disable_ctrl_shutdown, int, 0644);
158 MODULE_PARM_DESC(disable_ctrl_shutdown,
159 	"Disable controller shutdown when controller locked up.");
160 
161 static char *pqi_lockup_action_param;
162 module_param_named(lockup_action,
163 	pqi_lockup_action_param, charp, 0644);
164 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
165 	"\t\tSupported: none, reboot, panic\n"
166 	"\t\tDefault: none");
167 
168 static int pqi_expose_ld_first;
169 module_param_named(expose_ld_first,
170 	pqi_expose_ld_first, int, 0644);
171 MODULE_PARM_DESC(expose_ld_first, "Expose logical drives before physical drives.");
172 
173 static int pqi_hide_vsep;
174 module_param_named(hide_vsep,
175 	pqi_hide_vsep, int, 0644);
176 MODULE_PARM_DESC(hide_vsep, "Hide the virtual SEP for direct attached drives.");
177 
178 static int pqi_disable_managed_interrupts;
179 module_param_named(disable_managed_interrupts,
180 	pqi_disable_managed_interrupts, int, 0644);
181 MODULE_PARM_DESC(disable_managed_interrupts,
182 	"Disable the kernel automatically assigning SMP affinity to IRQs.");
183 
184 static unsigned int pqi_ctrl_ready_timeout_secs;
185 module_param_named(ctrl_ready_timeout,
186 	pqi_ctrl_ready_timeout_secs, uint, 0644);
187 MODULE_PARM_DESC(ctrl_ready_timeout,
188 	"Timeout in seconds for driver to wait for controller ready.");
189 
190 static char *raid_levels[] = {
191 	"RAID-0",
192 	"RAID-4",
193 	"RAID-1(1+0)",
194 	"RAID-5",
195 	"RAID-5+1",
196 	"RAID-6",
197 	"RAID-1(Triple)",
198 };
199 
200 static char *pqi_raid_level_to_string(u8 raid_level)
201 {
202 	if (raid_level < ARRAY_SIZE(raid_levels))
203 		return raid_levels[raid_level];
204 
205 	return "RAID UNKNOWN";
206 }
207 
208 #define SA_RAID_0		0
209 #define SA_RAID_4		1
210 #define SA_RAID_1		2	/* also used for RAID 10 */
211 #define SA_RAID_5		3	/* also used for RAID 50 */
212 #define SA_RAID_51		4
213 #define SA_RAID_6		5	/* also used for RAID 60 */
214 #define SA_RAID_TRIPLE		6	/* also used for RAID 1+0 Triple */
215 #define SA_RAID_MAX		SA_RAID_TRIPLE
216 #define SA_RAID_UNKNOWN		0xff
217 
218 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
219 {
220 	pqi_prep_for_scsi_done(scmd);
221 	scsi_done(scmd);
222 }
223 
224 static inline void pqi_disable_write_same(struct scsi_device *sdev)
225 {
226 	sdev->no_write_same = 1;
227 }
228 
229 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
230 {
231 	return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
232 }
233 
234 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
235 {
236 	return !device->is_physical_device;
237 }
238 
239 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
240 {
241 	return scsi3addr[2] != 0;
242 }
243 
244 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
245 {
246 	return !ctrl_info->controller_online;
247 }
248 
249 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
250 {
251 	if (ctrl_info->controller_online)
252 		if (!sis_is_firmware_running(ctrl_info))
253 			pqi_take_ctrl_offline(ctrl_info, PQI_FIRMWARE_KERNEL_NOT_UP);
254 }
255 
256 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
257 {
258 	return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
259 }
260 
261 #define PQI_DRIVER_SCRATCH_PQI_MODE			0x1
262 #define PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED		0x2
263 
264 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(struct pqi_ctrl_info *ctrl_info)
265 {
266 	return sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_PQI_MODE ? PQI_MODE : SIS_MODE;
267 }
268 
269 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
270 	enum pqi_ctrl_mode mode)
271 {
272 	u32 driver_scratch;
273 
274 	driver_scratch = sis_read_driver_scratch(ctrl_info);
275 
276 	if (mode == PQI_MODE)
277 		driver_scratch |= PQI_DRIVER_SCRATCH_PQI_MODE;
278 	else
279 		driver_scratch &= ~PQI_DRIVER_SCRATCH_PQI_MODE;
280 
281 	sis_write_driver_scratch(ctrl_info, driver_scratch);
282 }
283 
284 static inline bool pqi_is_fw_triage_supported(struct pqi_ctrl_info *ctrl_info)
285 {
286 	return (sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED) != 0;
287 }
288 
289 static inline void pqi_save_fw_triage_setting(struct pqi_ctrl_info *ctrl_info, bool is_supported)
290 {
291 	u32 driver_scratch;
292 
293 	driver_scratch = sis_read_driver_scratch(ctrl_info);
294 
295 	if (is_supported)
296 		driver_scratch |= PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
297 	else
298 		driver_scratch &= ~PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
299 
300 	sis_write_driver_scratch(ctrl_info, driver_scratch);
301 }
302 
303 static inline void pqi_ctrl_block_scan(struct pqi_ctrl_info *ctrl_info)
304 {
305 	ctrl_info->scan_blocked = true;
306 	mutex_lock(&ctrl_info->scan_mutex);
307 }
308 
309 static inline void pqi_ctrl_unblock_scan(struct pqi_ctrl_info *ctrl_info)
310 {
311 	ctrl_info->scan_blocked = false;
312 	mutex_unlock(&ctrl_info->scan_mutex);
313 }
314 
315 static inline bool pqi_ctrl_scan_blocked(struct pqi_ctrl_info *ctrl_info)
316 {
317 	return ctrl_info->scan_blocked;
318 }
319 
320 static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
321 {
322 	mutex_lock(&ctrl_info->lun_reset_mutex);
323 }
324 
325 static inline void pqi_ctrl_unblock_device_reset(struct pqi_ctrl_info *ctrl_info)
326 {
327 	mutex_unlock(&ctrl_info->lun_reset_mutex);
328 }
329 
330 static inline void pqi_scsi_block_requests(struct pqi_ctrl_info *ctrl_info)
331 {
332 	struct Scsi_Host *shost;
333 	unsigned int num_loops;
334 	int msecs_sleep;
335 
336 	shost = ctrl_info->scsi_host;
337 
338 	scsi_block_requests(shost);
339 
340 	num_loops = 0;
341 	msecs_sleep = 20;
342 	while (scsi_host_busy(shost)) {
343 		num_loops++;
344 		if (num_loops == 10)
345 			msecs_sleep = 500;
346 		msleep(msecs_sleep);
347 	}
348 }
349 
350 static inline void pqi_scsi_unblock_requests(struct pqi_ctrl_info *ctrl_info)
351 {
352 	scsi_unblock_requests(ctrl_info->scsi_host);
353 }
354 
355 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
356 {
357 	atomic_inc(&ctrl_info->num_busy_threads);
358 }
359 
360 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
361 {
362 	atomic_dec(&ctrl_info->num_busy_threads);
363 }
364 
365 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
366 {
367 	return ctrl_info->block_requests;
368 }
369 
370 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
371 {
372 	ctrl_info->block_requests = true;
373 }
374 
375 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
376 {
377 	ctrl_info->block_requests = false;
378 	wake_up_all(&ctrl_info->block_requests_wait);
379 }
380 
381 static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
382 {
383 	if (!pqi_ctrl_blocked(ctrl_info))
384 		return;
385 
386 	atomic_inc(&ctrl_info->num_blocked_threads);
387 	wait_event(ctrl_info->block_requests_wait,
388 		!pqi_ctrl_blocked(ctrl_info));
389 	atomic_dec(&ctrl_info->num_blocked_threads);
390 }
391 
392 #define PQI_QUIESCE_WARNING_TIMEOUT_SECS		10
393 
394 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
395 {
396 	unsigned long start_jiffies;
397 	unsigned long warning_timeout;
398 	bool displayed_warning;
399 
400 	displayed_warning = false;
401 	start_jiffies = jiffies;
402 	warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
403 
404 	while (atomic_read(&ctrl_info->num_busy_threads) >
405 		atomic_read(&ctrl_info->num_blocked_threads)) {
406 		if (time_after(jiffies, warning_timeout)) {
407 			dev_warn(&ctrl_info->pci_dev->dev,
408 				"waiting %u seconds for driver activity to quiesce\n",
409 				jiffies_to_msecs(jiffies - start_jiffies) / 1000);
410 			displayed_warning = true;
411 			warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + jiffies;
412 		}
413 		usleep_range(1000, 2000);
414 	}
415 
416 	if (displayed_warning)
417 		dev_warn(&ctrl_info->pci_dev->dev,
418 			"driver activity quiesced after waiting for %u seconds\n",
419 			jiffies_to_msecs(jiffies - start_jiffies) / 1000);
420 }
421 
422 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
423 {
424 	return device->device_offline;
425 }
426 
427 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
428 {
429 	mutex_lock(&ctrl_info->ofa_mutex);
430 }
431 
432 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
433 {
434 	mutex_unlock(&ctrl_info->ofa_mutex);
435 }
436 
437 static inline void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
438 {
439 	mutex_lock(&ctrl_info->ofa_mutex);
440 	mutex_unlock(&ctrl_info->ofa_mutex);
441 }
442 
443 static inline bool pqi_ofa_in_progress(struct pqi_ctrl_info *ctrl_info)
444 {
445 	return mutex_is_locked(&ctrl_info->ofa_mutex);
446 }
447 
448 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
449 {
450 	device->in_remove = true;
451 }
452 
453 static inline bool pqi_device_in_remove(struct pqi_scsi_dev *device)
454 {
455 	return device->in_remove;
456 }
457 
458 static inline int pqi_event_type_to_event_index(unsigned int event_type)
459 {
460 	int index;
461 
462 	for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
463 		if (event_type == pqi_supported_event_types[index])
464 			return index;
465 
466 	return -1;
467 }
468 
469 static inline bool pqi_is_supported_event(unsigned int event_type)
470 {
471 	return pqi_event_type_to_event_index(event_type) != -1;
472 }
473 
474 static inline void pqi_schedule_rescan_worker_with_delay(struct pqi_ctrl_info *ctrl_info,
475 	unsigned long delay)
476 {
477 	if (pqi_ctrl_offline(ctrl_info))
478 		return;
479 
480 	schedule_delayed_work(&ctrl_info->rescan_work, delay);
481 }
482 
483 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
484 {
485 	pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
486 }
487 
488 #define PQI_RESCAN_WORK_DELAY	(10 * HZ)
489 
490 static inline void pqi_schedule_rescan_worker_delayed(struct pqi_ctrl_info *ctrl_info)
491 {
492 	pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
493 }
494 
495 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
496 {
497 	cancel_delayed_work_sync(&ctrl_info->rescan_work);
498 }
499 
500 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
501 {
502 	if (!ctrl_info->heartbeat_counter)
503 		return 0;
504 
505 	return readl(ctrl_info->heartbeat_counter);
506 }
507 
508 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
509 {
510 	return readb(ctrl_info->soft_reset_status);
511 }
512 
513 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
514 {
515 	u8 status;
516 
517 	status = pqi_read_soft_reset_status(ctrl_info);
518 	status &= ~PQI_SOFT_RESET_ABORT;
519 	writeb(status, ctrl_info->soft_reset_status);
520 }
521 
522 static int pqi_map_single(struct pci_dev *pci_dev,
523 	struct pqi_sg_descriptor *sg_descriptor, void *buffer,
524 	size_t buffer_length, enum dma_data_direction data_direction)
525 {
526 	dma_addr_t bus_address;
527 
528 	if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
529 		return 0;
530 
531 	bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
532 		data_direction);
533 	if (dma_mapping_error(&pci_dev->dev, bus_address))
534 		return -ENOMEM;
535 
536 	put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
537 	put_unaligned_le32(buffer_length, &sg_descriptor->length);
538 	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
539 
540 	return 0;
541 }
542 
543 static void pqi_pci_unmap(struct pci_dev *pci_dev,
544 	struct pqi_sg_descriptor *descriptors, int num_descriptors,
545 	enum dma_data_direction data_direction)
546 {
547 	int i;
548 
549 	if (data_direction == DMA_NONE)
550 		return;
551 
552 	for (i = 0; i < num_descriptors; i++)
553 		dma_unmap_single(&pci_dev->dev,
554 			(dma_addr_t)get_unaligned_le64(&descriptors[i].address),
555 			get_unaligned_le32(&descriptors[i].length),
556 			data_direction);
557 }
558 
559 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
560 	struct pqi_raid_path_request *request, u8 cmd,
561 	u8 *scsi3addr, void *buffer, size_t buffer_length,
562 	u16 vpd_page, enum dma_data_direction *dir)
563 {
564 	u8 *cdb;
565 	size_t cdb_length = buffer_length;
566 
567 	memset(request, 0, sizeof(*request));
568 
569 	request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
570 	put_unaligned_le16(offsetof(struct pqi_raid_path_request,
571 		sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
572 		&request->header.iu_length);
573 	put_unaligned_le32(buffer_length, &request->buffer_length);
574 	memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
575 	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
576 	request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
577 
578 	cdb = request->cdb;
579 
580 	switch (cmd) {
581 	case TEST_UNIT_READY:
582 		request->data_direction = SOP_READ_FLAG;
583 		cdb[0] = TEST_UNIT_READY;
584 		break;
585 	case INQUIRY:
586 		request->data_direction = SOP_READ_FLAG;
587 		cdb[0] = INQUIRY;
588 		if (vpd_page & VPD_PAGE) {
589 			cdb[1] = 0x1;
590 			cdb[2] = (u8)vpd_page;
591 		}
592 		cdb[4] = (u8)cdb_length;
593 		break;
594 	case CISS_REPORT_LOG:
595 	case CISS_REPORT_PHYS:
596 		request->data_direction = SOP_READ_FLAG;
597 		cdb[0] = cmd;
598 		if (cmd == CISS_REPORT_PHYS) {
599 			if (ctrl_info->rpl_extended_format_4_5_supported)
600 				cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4;
601 			else
602 				cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2;
603 		} else {
604 			cdb[1] = ctrl_info->ciss_report_log_flags;
605 		}
606 		put_unaligned_be32(cdb_length, &cdb[6]);
607 		break;
608 	case CISS_GET_RAID_MAP:
609 		request->data_direction = SOP_READ_FLAG;
610 		cdb[0] = CISS_READ;
611 		cdb[1] = CISS_GET_RAID_MAP;
612 		put_unaligned_be32(cdb_length, &cdb[6]);
613 		break;
614 	case SA_FLUSH_CACHE:
615 		request->header.driver_flags = PQI_DRIVER_NONBLOCKABLE_REQUEST;
616 		request->data_direction = SOP_WRITE_FLAG;
617 		cdb[0] = BMIC_WRITE;
618 		cdb[6] = BMIC_FLUSH_CACHE;
619 		put_unaligned_be16(cdb_length, &cdb[7]);
620 		break;
621 	case BMIC_SENSE_DIAG_OPTIONS:
622 		cdb_length = 0;
623 		fallthrough;
624 	case BMIC_IDENTIFY_CONTROLLER:
625 	case BMIC_IDENTIFY_PHYSICAL_DEVICE:
626 	case BMIC_SENSE_SUBSYSTEM_INFORMATION:
627 	case BMIC_SENSE_FEATURE:
628 		request->data_direction = SOP_READ_FLAG;
629 		cdb[0] = BMIC_READ;
630 		cdb[6] = cmd;
631 		put_unaligned_be16(cdb_length, &cdb[7]);
632 		break;
633 	case BMIC_SET_DIAG_OPTIONS:
634 		cdb_length = 0;
635 		fallthrough;
636 	case BMIC_WRITE_HOST_WELLNESS:
637 		request->data_direction = SOP_WRITE_FLAG;
638 		cdb[0] = BMIC_WRITE;
639 		cdb[6] = cmd;
640 		put_unaligned_be16(cdb_length, &cdb[7]);
641 		break;
642 	case BMIC_CSMI_PASSTHRU:
643 		request->data_direction = SOP_BIDIRECTIONAL;
644 		cdb[0] = BMIC_WRITE;
645 		cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
646 		cdb[6] = cmd;
647 		put_unaligned_be16(cdb_length, &cdb[7]);
648 		break;
649 	default:
650 		dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd);
651 		break;
652 	}
653 
654 	switch (request->data_direction) {
655 	case SOP_READ_FLAG:
656 		*dir = DMA_FROM_DEVICE;
657 		break;
658 	case SOP_WRITE_FLAG:
659 		*dir = DMA_TO_DEVICE;
660 		break;
661 	case SOP_NO_DIRECTION_FLAG:
662 		*dir = DMA_NONE;
663 		break;
664 	default:
665 		*dir = DMA_BIDIRECTIONAL;
666 		break;
667 	}
668 
669 	return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
670 		buffer, buffer_length, *dir);
671 }
672 
673 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
674 {
675 	io_request->scmd = NULL;
676 	io_request->status = 0;
677 	io_request->error_info = NULL;
678 	io_request->raid_bypass = false;
679 }
680 
681 static struct pqi_io_request *pqi_alloc_io_request(
682 	struct pqi_ctrl_info *ctrl_info)
683 {
684 	struct pqi_io_request *io_request;
685 	u16 i = ctrl_info->next_io_request_slot;	/* benignly racy */
686 
687 	while (1) {
688 		io_request = &ctrl_info->io_request_pool[i];
689 		if (atomic_inc_return(&io_request->refcount) == 1)
690 			break;
691 		atomic_dec(&io_request->refcount);
692 		i = (i + 1) % ctrl_info->max_io_slots;
693 	}
694 
695 	/* benignly racy */
696 	ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
697 
698 	pqi_reinit_io_request(io_request);
699 
700 	return io_request;
701 }
702 
703 static void pqi_free_io_request(struct pqi_io_request *io_request)
704 {
705 	atomic_dec(&io_request->refcount);
706 }
707 
708 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
709 	u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
710 	struct pqi_raid_error_info *error_info)
711 {
712 	int rc;
713 	struct pqi_raid_path_request request;
714 	enum dma_data_direction dir;
715 
716 	rc = pqi_build_raid_path_request(ctrl_info, &request, cmd, scsi3addr,
717 		buffer, buffer_length, vpd_page, &dir);
718 	if (rc)
719 		return rc;
720 
721 	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, error_info);
722 
723 	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
724 
725 	return rc;
726 }
727 
728 /* helper functions for pqi_send_scsi_raid_request */
729 
730 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
731 	u8 cmd, void *buffer, size_t buffer_length)
732 {
733 	return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
734 		buffer, buffer_length, 0, NULL);
735 }
736 
737 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
738 	u8 cmd, void *buffer, size_t buffer_length,
739 	struct pqi_raid_error_info *error_info)
740 {
741 	return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
742 		buffer, buffer_length, 0, error_info);
743 }
744 
745 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
746 	struct bmic_identify_controller *buffer)
747 {
748 	return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
749 		buffer, sizeof(*buffer));
750 }
751 
752 static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
753 	struct bmic_sense_subsystem_info *sense_info)
754 {
755 	return pqi_send_ctrl_raid_request(ctrl_info,
756 		BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info,
757 		sizeof(*sense_info));
758 }
759 
760 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
761 	u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
762 {
763 	return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
764 		buffer, buffer_length, vpd_page, NULL);
765 }
766 
767 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
768 	struct pqi_scsi_dev *device,
769 	struct bmic_identify_physical_device *buffer, size_t buffer_length)
770 {
771 	int rc;
772 	enum dma_data_direction dir;
773 	u16 bmic_device_index;
774 	struct pqi_raid_path_request request;
775 
776 	rc = pqi_build_raid_path_request(ctrl_info, &request,
777 		BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
778 		buffer_length, 0, &dir);
779 	if (rc)
780 		return rc;
781 
782 	bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
783 	request.cdb[2] = (u8)bmic_device_index;
784 	request.cdb[9] = (u8)(bmic_device_index >> 8);
785 
786 	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
787 
788 	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
789 
790 	return rc;
791 }
792 
793 static inline u32 pqi_aio_limit_to_bytes(__le16 *limit)
794 {
795 	u32 bytes;
796 
797 	bytes = get_unaligned_le16(limit);
798 	if (bytes == 0)
799 		bytes = ~0;
800 	else
801 		bytes *= 1024;
802 
803 	return bytes;
804 }
805 
806 #pragma pack(1)
807 
808 struct bmic_sense_feature_buffer {
809 	struct bmic_sense_feature_buffer_header header;
810 	struct bmic_sense_feature_io_page_aio_subpage aio_subpage;
811 };
812 
813 #pragma pack()
814 
815 #define MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH	\
816 	offsetofend(struct bmic_sense_feature_buffer, \
817 		aio_subpage.max_write_raid_1_10_3drive)
818 
819 #define MINIMUM_AIO_SUBPAGE_LENGTH	\
820 	(offsetofend(struct bmic_sense_feature_io_page_aio_subpage, \
821 		max_write_raid_1_10_3drive) - \
822 		sizeof_field(struct bmic_sense_feature_io_page_aio_subpage, header))
823 
824 static int pqi_get_advanced_raid_bypass_config(struct pqi_ctrl_info *ctrl_info)
825 {
826 	int rc;
827 	enum dma_data_direction dir;
828 	struct pqi_raid_path_request request;
829 	struct bmic_sense_feature_buffer *buffer;
830 
831 	buffer = kmalloc(sizeof(*buffer), GFP_KERNEL);
832 	if (!buffer)
833 		return -ENOMEM;
834 
835 	rc = pqi_build_raid_path_request(ctrl_info, &request, BMIC_SENSE_FEATURE, RAID_CTLR_LUNID,
836 		buffer, sizeof(*buffer), 0, &dir);
837 	if (rc)
838 		goto error;
839 
840 	request.cdb[2] = BMIC_SENSE_FEATURE_IO_PAGE;
841 	request.cdb[3] = BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE;
842 
843 	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
844 
845 	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
846 
847 	if (rc)
848 		goto error;
849 
850 	if (buffer->header.page_code != BMIC_SENSE_FEATURE_IO_PAGE ||
851 		buffer->header.subpage_code !=
852 			BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
853 		get_unaligned_le16(&buffer->header.buffer_length) <
854 			MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH ||
855 		buffer->aio_subpage.header.page_code !=
856 			BMIC_SENSE_FEATURE_IO_PAGE ||
857 		buffer->aio_subpage.header.subpage_code !=
858 			BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
859 		get_unaligned_le16(&buffer->aio_subpage.header.page_length) <
860 			MINIMUM_AIO_SUBPAGE_LENGTH) {
861 		goto error;
862 	}
863 
864 	ctrl_info->max_transfer_encrypted_sas_sata =
865 		pqi_aio_limit_to_bytes(
866 			&buffer->aio_subpage.max_transfer_encrypted_sas_sata);
867 
868 	ctrl_info->max_transfer_encrypted_nvme =
869 		pqi_aio_limit_to_bytes(
870 			&buffer->aio_subpage.max_transfer_encrypted_nvme);
871 
872 	ctrl_info->max_write_raid_5_6 =
873 		pqi_aio_limit_to_bytes(
874 			&buffer->aio_subpage.max_write_raid_5_6);
875 
876 	ctrl_info->max_write_raid_1_10_2drive =
877 		pqi_aio_limit_to_bytes(
878 			&buffer->aio_subpage.max_write_raid_1_10_2drive);
879 
880 	ctrl_info->max_write_raid_1_10_3drive =
881 		pqi_aio_limit_to_bytes(
882 			&buffer->aio_subpage.max_write_raid_1_10_3drive);
883 
884 error:
885 	kfree(buffer);
886 
887 	return rc;
888 }
889 
890 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
891 	enum bmic_flush_cache_shutdown_event shutdown_event)
892 {
893 	int rc;
894 	struct bmic_flush_cache *flush_cache;
895 
896 	flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
897 	if (!flush_cache)
898 		return -ENOMEM;
899 
900 	flush_cache->shutdown_event = shutdown_event;
901 
902 	rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
903 		sizeof(*flush_cache));
904 
905 	kfree(flush_cache);
906 
907 	return rc;
908 }
909 
910 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
911 	struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
912 	struct pqi_raid_error_info *error_info)
913 {
914 	return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
915 		buffer, buffer_length, error_info);
916 }
917 
918 #define PQI_FETCH_PTRAID_DATA		(1 << 31)
919 
920 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
921 {
922 	int rc;
923 	struct bmic_diag_options *diag;
924 
925 	diag = kzalloc(sizeof(*diag), GFP_KERNEL);
926 	if (!diag)
927 		return -ENOMEM;
928 
929 	rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
930 		diag, sizeof(*diag));
931 	if (rc)
932 		goto out;
933 
934 	diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
935 
936 	rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag,
937 		sizeof(*diag));
938 
939 out:
940 	kfree(diag);
941 
942 	return rc;
943 }
944 
945 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
946 	void *buffer, size_t buffer_length)
947 {
948 	return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
949 		buffer, buffer_length);
950 }
951 
952 #pragma pack(1)
953 
954 struct bmic_host_wellness_driver_version {
955 	u8	start_tag[4];
956 	u8	driver_version_tag[2];
957 	__le16	driver_version_length;
958 	char	driver_version[32];
959 	u8	dont_write_tag[2];
960 	u8	end_tag[2];
961 };
962 
963 #pragma pack()
964 
965 static int pqi_write_driver_version_to_host_wellness(
966 	struct pqi_ctrl_info *ctrl_info)
967 {
968 	int rc;
969 	struct bmic_host_wellness_driver_version *buffer;
970 	size_t buffer_length;
971 
972 	buffer_length = sizeof(*buffer);
973 
974 	buffer = kmalloc(buffer_length, GFP_KERNEL);
975 	if (!buffer)
976 		return -ENOMEM;
977 
978 	buffer->start_tag[0] = '<';
979 	buffer->start_tag[1] = 'H';
980 	buffer->start_tag[2] = 'W';
981 	buffer->start_tag[3] = '>';
982 	buffer->driver_version_tag[0] = 'D';
983 	buffer->driver_version_tag[1] = 'V';
984 	put_unaligned_le16(sizeof(buffer->driver_version),
985 		&buffer->driver_version_length);
986 	strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
987 		sizeof(buffer->driver_version) - 1);
988 	buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
989 	buffer->dont_write_tag[0] = 'D';
990 	buffer->dont_write_tag[1] = 'W';
991 	buffer->end_tag[0] = 'Z';
992 	buffer->end_tag[1] = 'Z';
993 
994 	rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
995 
996 	kfree(buffer);
997 
998 	return rc;
999 }
1000 
1001 #pragma pack(1)
1002 
1003 struct bmic_host_wellness_time {
1004 	u8	start_tag[4];
1005 	u8	time_tag[2];
1006 	__le16	time_length;
1007 	u8	time[8];
1008 	u8	dont_write_tag[2];
1009 	u8	end_tag[2];
1010 };
1011 
1012 #pragma pack()
1013 
1014 static int pqi_write_current_time_to_host_wellness(
1015 	struct pqi_ctrl_info *ctrl_info)
1016 {
1017 	int rc;
1018 	struct bmic_host_wellness_time *buffer;
1019 	size_t buffer_length;
1020 	time64_t local_time;
1021 	unsigned int year;
1022 	struct tm tm;
1023 
1024 	buffer_length = sizeof(*buffer);
1025 
1026 	buffer = kmalloc(buffer_length, GFP_KERNEL);
1027 	if (!buffer)
1028 		return -ENOMEM;
1029 
1030 	buffer->start_tag[0] = '<';
1031 	buffer->start_tag[1] = 'H';
1032 	buffer->start_tag[2] = 'W';
1033 	buffer->start_tag[3] = '>';
1034 	buffer->time_tag[0] = 'T';
1035 	buffer->time_tag[1] = 'D';
1036 	put_unaligned_le16(sizeof(buffer->time),
1037 		&buffer->time_length);
1038 
1039 	local_time = ktime_get_real_seconds();
1040 	time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
1041 	year = tm.tm_year + 1900;
1042 
1043 	buffer->time[0] = bin2bcd(tm.tm_hour);
1044 	buffer->time[1] = bin2bcd(tm.tm_min);
1045 	buffer->time[2] = bin2bcd(tm.tm_sec);
1046 	buffer->time[3] = 0;
1047 	buffer->time[4] = bin2bcd(tm.tm_mon + 1);
1048 	buffer->time[5] = bin2bcd(tm.tm_mday);
1049 	buffer->time[6] = bin2bcd(year / 100);
1050 	buffer->time[7] = bin2bcd(year % 100);
1051 
1052 	buffer->dont_write_tag[0] = 'D';
1053 	buffer->dont_write_tag[1] = 'W';
1054 	buffer->end_tag[0] = 'Z';
1055 	buffer->end_tag[1] = 'Z';
1056 
1057 	rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1058 
1059 	kfree(buffer);
1060 
1061 	return rc;
1062 }
1063 
1064 #define PQI_UPDATE_TIME_WORK_INTERVAL	(24UL * 60 * 60 * HZ)
1065 
1066 static void pqi_update_time_worker(struct work_struct *work)
1067 {
1068 	int rc;
1069 	struct pqi_ctrl_info *ctrl_info;
1070 
1071 	ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1072 		update_time_work);
1073 
1074 	rc = pqi_write_current_time_to_host_wellness(ctrl_info);
1075 	if (rc)
1076 		dev_warn(&ctrl_info->pci_dev->dev,
1077 			"error updating time on controller\n");
1078 
1079 	schedule_delayed_work(&ctrl_info->update_time_work,
1080 		PQI_UPDATE_TIME_WORK_INTERVAL);
1081 }
1082 
1083 static inline void pqi_schedule_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1084 {
1085 	schedule_delayed_work(&ctrl_info->update_time_work, 0);
1086 }
1087 
1088 static inline void pqi_cancel_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1089 {
1090 	cancel_delayed_work_sync(&ctrl_info->update_time_work);
1091 }
1092 
1093 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void *buffer,
1094 	size_t buffer_length)
1095 {
1096 	return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer, buffer_length);
1097 }
1098 
1099 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void **buffer)
1100 {
1101 	int rc;
1102 	size_t lun_list_length;
1103 	size_t lun_data_length;
1104 	size_t new_lun_list_length;
1105 	void *lun_data = NULL;
1106 	struct report_lun_header *report_lun_header;
1107 
1108 	report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
1109 	if (!report_lun_header) {
1110 		rc = -ENOMEM;
1111 		goto out;
1112 	}
1113 
1114 	rc = pqi_report_luns(ctrl_info, cmd, report_lun_header, sizeof(*report_lun_header));
1115 	if (rc)
1116 		goto out;
1117 
1118 	lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
1119 
1120 again:
1121 	lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
1122 
1123 	lun_data = kmalloc(lun_data_length, GFP_KERNEL);
1124 	if (!lun_data) {
1125 		rc = -ENOMEM;
1126 		goto out;
1127 	}
1128 
1129 	if (lun_list_length == 0) {
1130 		memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
1131 		goto out;
1132 	}
1133 
1134 	rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
1135 	if (rc)
1136 		goto out;
1137 
1138 	new_lun_list_length =
1139 		get_unaligned_be32(&((struct report_lun_header *)lun_data)->list_length);
1140 
1141 	if (new_lun_list_length > lun_list_length) {
1142 		lun_list_length = new_lun_list_length;
1143 		kfree(lun_data);
1144 		goto again;
1145 	}
1146 
1147 out:
1148 	kfree(report_lun_header);
1149 
1150 	if (rc) {
1151 		kfree(lun_data);
1152 		lun_data = NULL;
1153 	}
1154 
1155 	*buffer = lun_data;
1156 
1157 	return rc;
1158 }
1159 
1160 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1161 {
1162 	int rc;
1163 	unsigned int i;
1164 	u8 rpl_response_format;
1165 	u32 num_physicals;
1166 	size_t rpl_16byte_wwid_list_length;
1167 	void *rpl_list;
1168 	struct report_lun_header *rpl_header;
1169 	struct report_phys_lun_8byte_wwid_list *rpl_8byte_wwid_list;
1170 	struct report_phys_lun_16byte_wwid_list *rpl_16byte_wwid_list;
1171 
1172 	rc = pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, &rpl_list);
1173 	if (rc)
1174 		return rc;
1175 
1176 	if (ctrl_info->rpl_extended_format_4_5_supported) {
1177 		rpl_header = rpl_list;
1178 		rpl_response_format = rpl_header->flags & CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_MASK;
1179 		if (rpl_response_format == CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4) {
1180 			*buffer = rpl_list;
1181 			return 0;
1182 		} else if (rpl_response_format != CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2) {
1183 			dev_err(&ctrl_info->pci_dev->dev,
1184 				"RPL returned unsupported data format %u\n",
1185 				rpl_response_format);
1186 			return -EINVAL;
1187 		} else {
1188 			dev_warn(&ctrl_info->pci_dev->dev,
1189 				"RPL returned extended format 2 instead of 4\n");
1190 		}
1191 	}
1192 
1193 	rpl_8byte_wwid_list = rpl_list;
1194 	num_physicals = get_unaligned_be32(&rpl_8byte_wwid_list->header.list_length) / sizeof(rpl_8byte_wwid_list->lun_entries[0]);
1195 	rpl_16byte_wwid_list_length = sizeof(struct report_lun_header) + (num_physicals * sizeof(struct report_phys_lun_16byte_wwid));
1196 
1197 	rpl_16byte_wwid_list = kmalloc(rpl_16byte_wwid_list_length, GFP_KERNEL);
1198 	if (!rpl_16byte_wwid_list)
1199 		return -ENOMEM;
1200 
1201 	put_unaligned_be32(num_physicals * sizeof(struct report_phys_lun_16byte_wwid),
1202 		&rpl_16byte_wwid_list->header.list_length);
1203 	rpl_16byte_wwid_list->header.flags = rpl_8byte_wwid_list->header.flags;
1204 
1205 	for (i = 0; i < num_physicals; i++) {
1206 		memcpy(&rpl_16byte_wwid_list->lun_entries[i].lunid, &rpl_8byte_wwid_list->lun_entries[i].lunid, sizeof(rpl_8byte_wwid_list->lun_entries[i].lunid));
1207 		memcpy(&rpl_16byte_wwid_list->lun_entries[i].wwid[0], &rpl_8byte_wwid_list->lun_entries[i].wwid, sizeof(rpl_8byte_wwid_list->lun_entries[i].wwid));
1208 		memset(&rpl_16byte_wwid_list->lun_entries[i].wwid[8], 0, 8);
1209 		rpl_16byte_wwid_list->lun_entries[i].device_type = rpl_8byte_wwid_list->lun_entries[i].device_type;
1210 		rpl_16byte_wwid_list->lun_entries[i].device_flags = rpl_8byte_wwid_list->lun_entries[i].device_flags;
1211 		rpl_16byte_wwid_list->lun_entries[i].lun_count = rpl_8byte_wwid_list->lun_entries[i].lun_count;
1212 		rpl_16byte_wwid_list->lun_entries[i].redundant_paths = rpl_8byte_wwid_list->lun_entries[i].redundant_paths;
1213 		rpl_16byte_wwid_list->lun_entries[i].aio_handle = rpl_8byte_wwid_list->lun_entries[i].aio_handle;
1214 	}
1215 
1216 	kfree(rpl_8byte_wwid_list);
1217 	*buffer = rpl_16byte_wwid_list;
1218 
1219 	return 0;
1220 }
1221 
1222 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1223 {
1224 	return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
1225 }
1226 
1227 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
1228 	struct report_phys_lun_16byte_wwid_list **physdev_list,
1229 	struct report_log_lun_list **logdev_list)
1230 {
1231 	int rc;
1232 	size_t logdev_list_length;
1233 	size_t logdev_data_length;
1234 	struct report_log_lun_list *internal_logdev_list;
1235 	struct report_log_lun_list *logdev_data;
1236 	struct report_lun_header report_lun_header;
1237 
1238 	rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1239 	if (rc)
1240 		dev_err(&ctrl_info->pci_dev->dev,
1241 			"report physical LUNs failed\n");
1242 
1243 	rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1244 	if (rc)
1245 		dev_err(&ctrl_info->pci_dev->dev,
1246 			"report logical LUNs failed\n");
1247 
1248 	/*
1249 	 * Tack the controller itself onto the end of the logical device list.
1250 	 */
1251 
1252 	logdev_data = *logdev_list;
1253 
1254 	if (logdev_data) {
1255 		logdev_list_length =
1256 			get_unaligned_be32(&logdev_data->header.list_length);
1257 	} else {
1258 		memset(&report_lun_header, 0, sizeof(report_lun_header));
1259 		logdev_data =
1260 			(struct report_log_lun_list *)&report_lun_header;
1261 		logdev_list_length = 0;
1262 	}
1263 
1264 	logdev_data_length = sizeof(struct report_lun_header) +
1265 		logdev_list_length;
1266 
1267 	internal_logdev_list = kmalloc(logdev_data_length +
1268 		sizeof(struct report_log_lun), GFP_KERNEL);
1269 	if (!internal_logdev_list) {
1270 		kfree(*logdev_list);
1271 		*logdev_list = NULL;
1272 		return -ENOMEM;
1273 	}
1274 
1275 	memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1276 	memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1277 		sizeof(struct report_log_lun));
1278 	put_unaligned_be32(logdev_list_length +
1279 		sizeof(struct report_log_lun),
1280 		&internal_logdev_list->header.list_length);
1281 
1282 	kfree(*logdev_list);
1283 	*logdev_list = internal_logdev_list;
1284 
1285 	return 0;
1286 }
1287 
1288 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1289 	int bus, int target, int lun)
1290 {
1291 	device->bus = bus;
1292 	device->target = target;
1293 	device->lun = lun;
1294 }
1295 
1296 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1297 {
1298 	u8 *scsi3addr;
1299 	u32 lunid;
1300 	int bus;
1301 	int target;
1302 	int lun;
1303 
1304 	scsi3addr = device->scsi3addr;
1305 	lunid = get_unaligned_le32(scsi3addr);
1306 
1307 	if (pqi_is_hba_lunid(scsi3addr)) {
1308 		/* The specified device is the controller. */
1309 		pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1310 		device->target_lun_valid = true;
1311 		return;
1312 	}
1313 
1314 	if (pqi_is_logical_device(device)) {
1315 		if (device->is_external_raid_device) {
1316 			bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1317 			target = (lunid >> 16) & 0x3fff;
1318 			lun = lunid & 0xff;
1319 		} else {
1320 			bus = PQI_RAID_VOLUME_BUS;
1321 			target = 0;
1322 			lun = lunid & 0x3fff;
1323 		}
1324 		pqi_set_bus_target_lun(device, bus, target, lun);
1325 		device->target_lun_valid = true;
1326 		return;
1327 	}
1328 
1329 	/*
1330 	 * Defer target and LUN assignment for non-controller physical devices
1331 	 * because the SAS transport layer will make these assignments later.
1332 	 */
1333 	pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1334 }
1335 
1336 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1337 	struct pqi_scsi_dev *device)
1338 {
1339 	int rc;
1340 	u8 raid_level;
1341 	u8 *buffer;
1342 
1343 	raid_level = SA_RAID_UNKNOWN;
1344 
1345 	buffer = kmalloc(64, GFP_KERNEL);
1346 	if (buffer) {
1347 		rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1348 			VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1349 		if (rc == 0) {
1350 			raid_level = buffer[8];
1351 			if (raid_level > SA_RAID_MAX)
1352 				raid_level = SA_RAID_UNKNOWN;
1353 		}
1354 		kfree(buffer);
1355 	}
1356 
1357 	device->raid_level = raid_level;
1358 }
1359 
1360 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1361 	struct pqi_scsi_dev *device, struct raid_map *raid_map)
1362 {
1363 	char *err_msg;
1364 	u32 raid_map_size;
1365 	u32 r5or6_blocks_per_row;
1366 
1367 	raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1368 
1369 	if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1370 		err_msg = "RAID map too small";
1371 		goto bad_raid_map;
1372 	}
1373 
1374 	if (device->raid_level == SA_RAID_1) {
1375 		if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1376 			err_msg = "invalid RAID-1 map";
1377 			goto bad_raid_map;
1378 		}
1379 	} else if (device->raid_level == SA_RAID_TRIPLE) {
1380 		if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1381 			err_msg = "invalid RAID-1(Triple) map";
1382 			goto bad_raid_map;
1383 		}
1384 	} else if ((device->raid_level == SA_RAID_5 ||
1385 		device->raid_level == SA_RAID_6) &&
1386 		get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1387 		/* RAID 50/60 */
1388 		r5or6_blocks_per_row =
1389 			get_unaligned_le16(&raid_map->strip_size) *
1390 			get_unaligned_le16(&raid_map->data_disks_per_row);
1391 		if (r5or6_blocks_per_row == 0) {
1392 			err_msg = "invalid RAID-5 or RAID-6 map";
1393 			goto bad_raid_map;
1394 		}
1395 	}
1396 
1397 	return 0;
1398 
1399 bad_raid_map:
1400 	dev_warn(&ctrl_info->pci_dev->dev,
1401 		"logical device %08x%08x %s\n",
1402 		*((u32 *)&device->scsi3addr),
1403 		*((u32 *)&device->scsi3addr[4]), err_msg);
1404 
1405 	return -EINVAL;
1406 }
1407 
1408 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1409 	struct pqi_scsi_dev *device)
1410 {
1411 	int rc;
1412 	u32 raid_map_size;
1413 	struct raid_map *raid_map;
1414 
1415 	raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1416 	if (!raid_map)
1417 		return -ENOMEM;
1418 
1419 	rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1420 		device->scsi3addr, raid_map, sizeof(*raid_map), 0, NULL);
1421 	if (rc)
1422 		goto error;
1423 
1424 	raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1425 
1426 	if (raid_map_size > sizeof(*raid_map)) {
1427 
1428 		kfree(raid_map);
1429 
1430 		raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1431 		if (!raid_map)
1432 			return -ENOMEM;
1433 
1434 		rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1435 			device->scsi3addr, raid_map, raid_map_size, 0, NULL);
1436 		if (rc)
1437 			goto error;
1438 
1439 		if (get_unaligned_le32(&raid_map->structure_size)
1440 			!= raid_map_size) {
1441 			dev_warn(&ctrl_info->pci_dev->dev,
1442 				"requested %u bytes, received %u bytes\n",
1443 				raid_map_size,
1444 				get_unaligned_le32(&raid_map->structure_size));
1445 			rc = -EINVAL;
1446 			goto error;
1447 		}
1448 	}
1449 
1450 	rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1451 	if (rc)
1452 		goto error;
1453 
1454 	device->raid_map = raid_map;
1455 
1456 	return 0;
1457 
1458 error:
1459 	kfree(raid_map);
1460 
1461 	return rc;
1462 }
1463 
1464 static void pqi_set_max_transfer_encrypted(struct pqi_ctrl_info *ctrl_info,
1465 	struct pqi_scsi_dev *device)
1466 {
1467 	if (!ctrl_info->lv_drive_type_mix_valid) {
1468 		device->max_transfer_encrypted = ~0;
1469 		return;
1470 	}
1471 
1472 	switch (LV_GET_DRIVE_TYPE_MIX(device->scsi3addr)) {
1473 	case LV_DRIVE_TYPE_MIX_SAS_HDD_ONLY:
1474 	case LV_DRIVE_TYPE_MIX_SATA_HDD_ONLY:
1475 	case LV_DRIVE_TYPE_MIX_SAS_OR_SATA_SSD_ONLY:
1476 	case LV_DRIVE_TYPE_MIX_SAS_SSD_ONLY:
1477 	case LV_DRIVE_TYPE_MIX_SATA_SSD_ONLY:
1478 	case LV_DRIVE_TYPE_MIX_SAS_ONLY:
1479 	case LV_DRIVE_TYPE_MIX_SATA_ONLY:
1480 		device->max_transfer_encrypted =
1481 			ctrl_info->max_transfer_encrypted_sas_sata;
1482 		break;
1483 	case LV_DRIVE_TYPE_MIX_NVME_ONLY:
1484 		device->max_transfer_encrypted =
1485 			ctrl_info->max_transfer_encrypted_nvme;
1486 		break;
1487 	case LV_DRIVE_TYPE_MIX_UNKNOWN:
1488 	case LV_DRIVE_TYPE_MIX_NO_RESTRICTION:
1489 	default:
1490 		device->max_transfer_encrypted =
1491 			min(ctrl_info->max_transfer_encrypted_sas_sata,
1492 				ctrl_info->max_transfer_encrypted_nvme);
1493 		break;
1494 	}
1495 }
1496 
1497 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1498 	struct pqi_scsi_dev *device)
1499 {
1500 	int rc;
1501 	u8 *buffer;
1502 	u8 bypass_status;
1503 
1504 	buffer = kmalloc(64, GFP_KERNEL);
1505 	if (!buffer)
1506 		return;
1507 
1508 	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1509 		VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1510 	if (rc)
1511 		goto out;
1512 
1513 #define RAID_BYPASS_STATUS		4
1514 #define RAID_BYPASS_CONFIGURED		0x1
1515 #define RAID_BYPASS_ENABLED		0x2
1516 
1517 	bypass_status = buffer[RAID_BYPASS_STATUS];
1518 	device->raid_bypass_configured =
1519 		(bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1520 	if (device->raid_bypass_configured &&
1521 		(bypass_status & RAID_BYPASS_ENABLED) &&
1522 		pqi_get_raid_map(ctrl_info, device) == 0) {
1523 		device->raid_bypass_enabled = true;
1524 		if (get_unaligned_le16(&device->raid_map->flags) &
1525 			RAID_MAP_ENCRYPTION_ENABLED)
1526 			pqi_set_max_transfer_encrypted(ctrl_info, device);
1527 	}
1528 
1529 out:
1530 	kfree(buffer);
1531 }
1532 
1533 /*
1534  * Use vendor-specific VPD to determine online/offline status of a volume.
1535  */
1536 
1537 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1538 	struct pqi_scsi_dev *device)
1539 {
1540 	int rc;
1541 	size_t page_length;
1542 	u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1543 	bool volume_offline = true;
1544 	u32 volume_flags;
1545 	struct ciss_vpd_logical_volume_status *vpd;
1546 
1547 	vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1548 	if (!vpd)
1549 		goto no_buffer;
1550 
1551 	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1552 		VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1553 	if (rc)
1554 		goto out;
1555 
1556 	if (vpd->page_code != CISS_VPD_LV_STATUS)
1557 		goto out;
1558 
1559 	page_length = offsetof(struct ciss_vpd_logical_volume_status,
1560 		volume_status) + vpd->page_length;
1561 	if (page_length < sizeof(*vpd))
1562 		goto out;
1563 
1564 	volume_status = vpd->volume_status;
1565 	volume_flags = get_unaligned_be32(&vpd->flags);
1566 	volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1567 
1568 out:
1569 	kfree(vpd);
1570 no_buffer:
1571 	device->volume_status = volume_status;
1572 	device->volume_offline = volume_offline;
1573 }
1574 
1575 #define PQI_DEVICE_NCQ_PRIO_SUPPORTED	0x01
1576 #define PQI_DEVICE_PHY_MAP_SUPPORTED	0x10
1577 
1578 static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
1579 	struct pqi_scsi_dev *device,
1580 	struct bmic_identify_physical_device *id_phys)
1581 {
1582 	int rc;
1583 
1584 	memset(id_phys, 0, sizeof(*id_phys));
1585 
1586 	rc = pqi_identify_physical_device(ctrl_info, device,
1587 		id_phys, sizeof(*id_phys));
1588 	if (rc) {
1589 		device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1590 		return rc;
1591 	}
1592 
1593 	scsi_sanitize_inquiry_string(&id_phys->model[0], 8);
1594 	scsi_sanitize_inquiry_string(&id_phys->model[8], 16);
1595 
1596 	memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor));
1597 	memcpy(device->model, &id_phys->model[8], sizeof(device->model));
1598 
1599 	device->box_index = id_phys->box_index;
1600 	device->phys_box_on_bus = id_phys->phys_box_on_bus;
1601 	device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
1602 	device->queue_depth =
1603 		get_unaligned_le16(&id_phys->current_queue_depth_limit);
1604 	device->active_path_index = id_phys->active_path_number;
1605 	device->path_map = id_phys->redundant_path_present_map;
1606 	memcpy(&device->box,
1607 		&id_phys->alternate_paths_phys_box_on_port,
1608 		sizeof(device->box));
1609 	memcpy(&device->phys_connector,
1610 		&id_phys->alternate_paths_phys_connector,
1611 		sizeof(device->phys_connector));
1612 	device->bay = id_phys->phys_bay_in_box;
1613 	device->multi_lun_device_lun_count = id_phys->multi_lun_device_lun_count;
1614 	if (!device->multi_lun_device_lun_count)
1615 		device->multi_lun_device_lun_count = 1;
1616 	if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) &&
1617 		id_phys->phy_count)
1618 		device->phy_id =
1619 			id_phys->phy_to_phy_map[device->active_path_index];
1620 	else
1621 		device->phy_id = 0xFF;
1622 
1623 	device->ncq_prio_support =
1624 		((get_unaligned_le32(&id_phys->misc_drive_flags) >> 16) &
1625 		PQI_DEVICE_NCQ_PRIO_SUPPORTED);
1626 
1627 	return 0;
1628 }
1629 
1630 static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info,
1631 	struct pqi_scsi_dev *device)
1632 {
1633 	int rc;
1634 	u8 *buffer;
1635 
1636 	buffer = kmalloc(64, GFP_KERNEL);
1637 	if (!buffer)
1638 		return -ENOMEM;
1639 
1640 	/* Send an inquiry to the device to see what it is. */
1641 	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1642 	if (rc)
1643 		goto out;
1644 
1645 	scsi_sanitize_inquiry_string(&buffer[8], 8);
1646 	scsi_sanitize_inquiry_string(&buffer[16], 16);
1647 
1648 	device->devtype = buffer[0] & 0x1f;
1649 	memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1650 	memcpy(device->model, &buffer[16], sizeof(device->model));
1651 
1652 	if (device->devtype == TYPE_DISK) {
1653 		if (device->is_external_raid_device) {
1654 			device->raid_level = SA_RAID_UNKNOWN;
1655 			device->volume_status = CISS_LV_OK;
1656 			device->volume_offline = false;
1657 		} else {
1658 			pqi_get_raid_level(ctrl_info, device);
1659 			pqi_get_raid_bypass_status(ctrl_info, device);
1660 			pqi_get_volume_status(ctrl_info, device);
1661 		}
1662 	}
1663 
1664 out:
1665 	kfree(buffer);
1666 
1667 	return rc;
1668 }
1669 
1670 /*
1671  * Prevent adding drive to OS for some corner cases such as a drive
1672  * undergoing a sanitize operation. Some OSes will continue to poll
1673  * the drive until the sanitize completes, which can take hours,
1674  * resulting in long bootup delays. Commands such as TUR, READ_CAP
1675  * are allowed, but READ/WRITE cause check condition. So the OS
1676  * cannot check/read the partition table.
1677  * Note: devices that have completed sanitize must be re-enabled
1678  *       using the management utility.
1679  */
1680 static bool pqi_keep_device_offline(struct pqi_ctrl_info *ctrl_info,
1681 	struct pqi_scsi_dev *device)
1682 {
1683 	u8 scsi_status;
1684 	int rc;
1685 	enum dma_data_direction dir;
1686 	char *buffer;
1687 	int buffer_length = 64;
1688 	size_t sense_data_length;
1689 	struct scsi_sense_hdr sshdr;
1690 	struct pqi_raid_path_request request;
1691 	struct pqi_raid_error_info error_info;
1692 	bool offline = false; /* Assume keep online */
1693 
1694 	/* Do not check controllers. */
1695 	if (pqi_is_hba_lunid(device->scsi3addr))
1696 		return false;
1697 
1698 	/* Do not check LVs. */
1699 	if (pqi_is_logical_device(device))
1700 		return false;
1701 
1702 	buffer = kmalloc(buffer_length, GFP_KERNEL);
1703 	if (!buffer)
1704 		return false; /* Assume not offline */
1705 
1706 	/* Check for SANITIZE in progress using TUR */
1707 	rc = pqi_build_raid_path_request(ctrl_info, &request,
1708 		TEST_UNIT_READY, RAID_CTLR_LUNID, buffer,
1709 		buffer_length, 0, &dir);
1710 	if (rc)
1711 		goto out; /* Assume not offline */
1712 
1713 	memcpy(request.lun_number, device->scsi3addr, sizeof(request.lun_number));
1714 
1715 	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, &error_info);
1716 
1717 	if (rc)
1718 		goto out; /* Assume not offline */
1719 
1720 	scsi_status = error_info.status;
1721 	sense_data_length = get_unaligned_le16(&error_info.sense_data_length);
1722 	if (sense_data_length == 0)
1723 		sense_data_length =
1724 			get_unaligned_le16(&error_info.response_data_length);
1725 	if (sense_data_length) {
1726 		if (sense_data_length > sizeof(error_info.data))
1727 			sense_data_length = sizeof(error_info.data);
1728 
1729 		/*
1730 		 * Check for sanitize in progress: asc:0x04, ascq: 0x1b
1731 		 */
1732 		if (scsi_status == SAM_STAT_CHECK_CONDITION &&
1733 			scsi_normalize_sense(error_info.data,
1734 				sense_data_length, &sshdr) &&
1735 				sshdr.sense_key == NOT_READY &&
1736 				sshdr.asc == 0x04 &&
1737 				sshdr.ascq == 0x1b) {
1738 			device->device_offline = true;
1739 			offline = true;
1740 			goto out; /* Keep device offline */
1741 		}
1742 	}
1743 
1744 out:
1745 	kfree(buffer);
1746 	return offline;
1747 }
1748 
1749 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1750 	struct pqi_scsi_dev *device,
1751 	struct bmic_identify_physical_device *id_phys)
1752 {
1753 	int rc;
1754 
1755 	if (device->is_expander_smp_device)
1756 		return 0;
1757 
1758 	if (pqi_is_logical_device(device))
1759 		rc = pqi_get_logical_device_info(ctrl_info, device);
1760 	else
1761 		rc = pqi_get_physical_device_info(ctrl_info, device, id_phys);
1762 
1763 	return rc;
1764 }
1765 
1766 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1767 	struct pqi_scsi_dev *device)
1768 {
1769 	char *status;
1770 	static const char unknown_state_str[] =
1771 		"Volume is in an unknown state (%u)";
1772 	char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1773 
1774 	switch (device->volume_status) {
1775 	case CISS_LV_OK:
1776 		status = "Volume online";
1777 		break;
1778 	case CISS_LV_FAILED:
1779 		status = "Volume failed";
1780 		break;
1781 	case CISS_LV_NOT_CONFIGURED:
1782 		status = "Volume not configured";
1783 		break;
1784 	case CISS_LV_DEGRADED:
1785 		status = "Volume degraded";
1786 		break;
1787 	case CISS_LV_READY_FOR_RECOVERY:
1788 		status = "Volume ready for recovery operation";
1789 		break;
1790 	case CISS_LV_UNDERGOING_RECOVERY:
1791 		status = "Volume undergoing recovery";
1792 		break;
1793 	case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1794 		status = "Wrong physical drive was replaced";
1795 		break;
1796 	case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1797 		status = "A physical drive not properly connected";
1798 		break;
1799 	case CISS_LV_HARDWARE_OVERHEATING:
1800 		status = "Hardware is overheating";
1801 		break;
1802 	case CISS_LV_HARDWARE_HAS_OVERHEATED:
1803 		status = "Hardware has overheated";
1804 		break;
1805 	case CISS_LV_UNDERGOING_EXPANSION:
1806 		status = "Volume undergoing expansion";
1807 		break;
1808 	case CISS_LV_NOT_AVAILABLE:
1809 		status = "Volume waiting for transforming volume";
1810 		break;
1811 	case CISS_LV_QUEUED_FOR_EXPANSION:
1812 		status = "Volume queued for expansion";
1813 		break;
1814 	case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1815 		status = "Volume disabled due to SCSI ID conflict";
1816 		break;
1817 	case CISS_LV_EJECTED:
1818 		status = "Volume has been ejected";
1819 		break;
1820 	case CISS_LV_UNDERGOING_ERASE:
1821 		status = "Volume undergoing background erase";
1822 		break;
1823 	case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1824 		status = "Volume ready for predictive spare rebuild";
1825 		break;
1826 	case CISS_LV_UNDERGOING_RPI:
1827 		status = "Volume undergoing rapid parity initialization";
1828 		break;
1829 	case CISS_LV_PENDING_RPI:
1830 		status = "Volume queued for rapid parity initialization";
1831 		break;
1832 	case CISS_LV_ENCRYPTED_NO_KEY:
1833 		status = "Encrypted volume inaccessible - key not present";
1834 		break;
1835 	case CISS_LV_UNDERGOING_ENCRYPTION:
1836 		status = "Volume undergoing encryption process";
1837 		break;
1838 	case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1839 		status = "Volume undergoing encryption re-keying process";
1840 		break;
1841 	case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1842 		status = "Volume encrypted but encryption is disabled";
1843 		break;
1844 	case CISS_LV_PENDING_ENCRYPTION:
1845 		status = "Volume pending migration to encrypted state";
1846 		break;
1847 	case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1848 		status = "Volume pending encryption rekeying";
1849 		break;
1850 	case CISS_LV_NOT_SUPPORTED:
1851 		status = "Volume not supported on this controller";
1852 		break;
1853 	case CISS_LV_STATUS_UNAVAILABLE:
1854 		status = "Volume status not available";
1855 		break;
1856 	default:
1857 		snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1858 			unknown_state_str, device->volume_status);
1859 		status = unknown_state_buffer;
1860 		break;
1861 	}
1862 
1863 	dev_info(&ctrl_info->pci_dev->dev,
1864 		"scsi %d:%d:%d:%d %s\n",
1865 		ctrl_info->scsi_host->host_no,
1866 		device->bus, device->target, device->lun, status);
1867 }
1868 
1869 static void pqi_rescan_worker(struct work_struct *work)
1870 {
1871 	struct pqi_ctrl_info *ctrl_info;
1872 
1873 	ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1874 		rescan_work);
1875 
1876 	pqi_scan_scsi_devices(ctrl_info);
1877 }
1878 
1879 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1880 	struct pqi_scsi_dev *device)
1881 {
1882 	int rc;
1883 
1884 	if (pqi_is_logical_device(device))
1885 		rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1886 			device->target, device->lun);
1887 	else
1888 		rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1889 
1890 	return rc;
1891 }
1892 
1893 #define PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS	(20 * 1000)
1894 
1895 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
1896 {
1897 	int rc;
1898 	int lun;
1899 
1900 	for (lun = 0; lun < device->multi_lun_device_lun_count; lun++) {
1901 		rc = pqi_device_wait_for_pending_io(ctrl_info, device, lun,
1902 			PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
1903 		if (rc)
1904 			dev_err(&ctrl_info->pci_dev->dev,
1905 				"scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
1906 				ctrl_info->scsi_host->host_no, device->bus,
1907 				device->target, lun,
1908 				atomic_read(&device->scsi_cmds_outstanding[lun]));
1909 	}
1910 
1911 	if (pqi_is_logical_device(device))
1912 		scsi_remove_device(device->sdev);
1913 	else
1914 		pqi_remove_sas_device(device);
1915 
1916 	pqi_device_remove_start(device);
1917 }
1918 
1919 /* Assumes the SCSI device list lock is held. */
1920 
1921 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1922 	int bus, int target, int lun)
1923 {
1924 	struct pqi_scsi_dev *device;
1925 
1926 	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1927 		if (device->bus == bus && device->target == target && device->lun == lun)
1928 			return device;
1929 
1930 	return NULL;
1931 }
1932 
1933 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, struct pqi_scsi_dev *dev2)
1934 {
1935 	if (dev1->is_physical_device != dev2->is_physical_device)
1936 		return false;
1937 
1938 	if (dev1->is_physical_device)
1939 		return memcmp(dev1->wwid, dev2->wwid, sizeof(dev1->wwid)) == 0;
1940 
1941 	return memcmp(dev1->volume_id, dev2->volume_id, sizeof(dev1->volume_id)) == 0;
1942 }
1943 
1944 enum pqi_find_result {
1945 	DEVICE_NOT_FOUND,
1946 	DEVICE_CHANGED,
1947 	DEVICE_SAME,
1948 };
1949 
1950 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1951 	struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device)
1952 {
1953 	struct pqi_scsi_dev *device;
1954 
1955 	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
1956 		if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) {
1957 			*matching_device = device;
1958 			if (pqi_device_equal(device_to_find, device)) {
1959 				if (device_to_find->volume_offline)
1960 					return DEVICE_CHANGED;
1961 				return DEVICE_SAME;
1962 			}
1963 			return DEVICE_CHANGED;
1964 		}
1965 	}
1966 
1967 	return DEVICE_NOT_FOUND;
1968 }
1969 
1970 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1971 {
1972 	if (device->is_expander_smp_device)
1973 		return "Enclosure SMP    ";
1974 
1975 	return scsi_device_type(device->devtype);
1976 }
1977 
1978 #define PQI_DEV_INFO_BUFFER_LENGTH	128
1979 
1980 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1981 	char *action, struct pqi_scsi_dev *device)
1982 {
1983 	ssize_t count;
1984 	char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1985 
1986 	count = scnprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1987 		"%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1988 
1989 	if (device->target_lun_valid)
1990 		count += scnprintf(buffer + count,
1991 			PQI_DEV_INFO_BUFFER_LENGTH - count,
1992 			"%d:%d",
1993 			device->target,
1994 			device->lun);
1995 	else
1996 		count += scnprintf(buffer + count,
1997 			PQI_DEV_INFO_BUFFER_LENGTH - count,
1998 			"-:-");
1999 
2000 	if (pqi_is_logical_device(device))
2001 		count += scnprintf(buffer + count,
2002 			PQI_DEV_INFO_BUFFER_LENGTH - count,
2003 			" %08x%08x",
2004 			*((u32 *)&device->scsi3addr),
2005 			*((u32 *)&device->scsi3addr[4]));
2006 	else
2007 		count += scnprintf(buffer + count,
2008 			PQI_DEV_INFO_BUFFER_LENGTH - count,
2009 			" %016llx%016llx",
2010 			get_unaligned_be64(&device->wwid[0]),
2011 			get_unaligned_be64(&device->wwid[8]));
2012 
2013 	count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
2014 		" %s %.8s %.16s ",
2015 		pqi_device_type(device),
2016 		device->vendor,
2017 		device->model);
2018 
2019 	if (pqi_is_logical_device(device)) {
2020 		if (device->devtype == TYPE_DISK)
2021 			count += scnprintf(buffer + count,
2022 				PQI_DEV_INFO_BUFFER_LENGTH - count,
2023 				"SSDSmartPathCap%c En%c %-12s",
2024 				device->raid_bypass_configured ? '+' : '-',
2025 				device->raid_bypass_enabled ? '+' : '-',
2026 				pqi_raid_level_to_string(device->raid_level));
2027 	} else {
2028 		count += scnprintf(buffer + count,
2029 			PQI_DEV_INFO_BUFFER_LENGTH - count,
2030 			"AIO%c", device->aio_enabled ? '+' : '-');
2031 		if (device->devtype == TYPE_DISK ||
2032 			device->devtype == TYPE_ZBC)
2033 			count += scnprintf(buffer + count,
2034 				PQI_DEV_INFO_BUFFER_LENGTH - count,
2035 				" qd=%-6d", device->queue_depth);
2036 	}
2037 
2038 	dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
2039 }
2040 
2041 static bool pqi_raid_maps_equal(struct raid_map *raid_map1, struct raid_map *raid_map2)
2042 {
2043 	u32 raid_map1_size;
2044 	u32 raid_map2_size;
2045 
2046 	if (raid_map1 == NULL || raid_map2 == NULL)
2047 		return raid_map1 == raid_map2;
2048 
2049 	raid_map1_size = get_unaligned_le32(&raid_map1->structure_size);
2050 	raid_map2_size = get_unaligned_le32(&raid_map2->structure_size);
2051 
2052 	if (raid_map1_size != raid_map2_size)
2053 		return false;
2054 
2055 	return memcmp(raid_map1, raid_map2, raid_map1_size) == 0;
2056 }
2057 
2058 /* Assumes the SCSI device list lock is held. */
2059 
2060 static void pqi_scsi_update_device(struct pqi_ctrl_info *ctrl_info,
2061 	struct pqi_scsi_dev *existing_device, struct pqi_scsi_dev *new_device)
2062 {
2063 	existing_device->device_type = new_device->device_type;
2064 	existing_device->bus = new_device->bus;
2065 	if (new_device->target_lun_valid) {
2066 		existing_device->target = new_device->target;
2067 		existing_device->lun = new_device->lun;
2068 		existing_device->target_lun_valid = true;
2069 	}
2070 
2071 	/* By definition, the scsi3addr and wwid fields are already the same. */
2072 
2073 	existing_device->is_physical_device = new_device->is_physical_device;
2074 	memcpy(existing_device->vendor, new_device->vendor, sizeof(existing_device->vendor));
2075 	memcpy(existing_device->model, new_device->model, sizeof(existing_device->model));
2076 	existing_device->sas_address = new_device->sas_address;
2077 	existing_device->queue_depth = new_device->queue_depth;
2078 	existing_device->device_offline = false;
2079 
2080 	if (pqi_is_logical_device(existing_device)) {
2081 		existing_device->is_external_raid_device = new_device->is_external_raid_device;
2082 
2083 		if (existing_device->devtype == TYPE_DISK) {
2084 			existing_device->raid_level = new_device->raid_level;
2085 			existing_device->volume_status = new_device->volume_status;
2086 			if (ctrl_info->logical_volume_rescan_needed)
2087 				existing_device->rescan = true;
2088 			memset(existing_device->next_bypass_group, 0, sizeof(existing_device->next_bypass_group));
2089 			if (!pqi_raid_maps_equal(existing_device->raid_map, new_device->raid_map)) {
2090 				kfree(existing_device->raid_map);
2091 				existing_device->raid_map = new_device->raid_map;
2092 				/* To prevent this from being freed later. */
2093 				new_device->raid_map = NULL;
2094 			}
2095 			existing_device->raid_bypass_configured = new_device->raid_bypass_configured;
2096 			existing_device->raid_bypass_enabled = new_device->raid_bypass_enabled;
2097 		}
2098 	} else {
2099 		existing_device->aio_enabled = new_device->aio_enabled;
2100 		existing_device->aio_handle = new_device->aio_handle;
2101 		existing_device->is_expander_smp_device = new_device->is_expander_smp_device;
2102 		existing_device->active_path_index = new_device->active_path_index;
2103 		existing_device->phy_id = new_device->phy_id;
2104 		existing_device->path_map = new_device->path_map;
2105 		existing_device->bay = new_device->bay;
2106 		existing_device->box_index = new_device->box_index;
2107 		existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
2108 		existing_device->phy_connected_dev_type = new_device->phy_connected_dev_type;
2109 		memcpy(existing_device->box, new_device->box, sizeof(existing_device->box));
2110 		memcpy(existing_device->phys_connector, new_device->phys_connector, sizeof(existing_device->phys_connector));
2111 
2112 		existing_device->multi_lun_device_lun_count = new_device->multi_lun_device_lun_count;
2113 		if (existing_device->multi_lun_device_lun_count == 0)
2114 			existing_device->multi_lun_device_lun_count = 1;
2115 	}
2116 }
2117 
2118 static inline void pqi_free_device(struct pqi_scsi_dev *device)
2119 {
2120 	if (device) {
2121 		kfree(device->raid_map);
2122 		kfree(device);
2123 	}
2124 }
2125 
2126 /*
2127  * Called when exposing a new device to the OS fails in order to re-adjust
2128  * our internal SCSI device list to match the SCSI ML's view.
2129  */
2130 
2131 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
2132 	struct pqi_scsi_dev *device)
2133 {
2134 	unsigned long flags;
2135 
2136 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2137 	list_del(&device->scsi_device_list_entry);
2138 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2139 
2140 	/* Allow the device structure to be freed later. */
2141 	device->keep_device = false;
2142 }
2143 
2144 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
2145 {
2146 	if (device->is_expander_smp_device)
2147 		return device->sas_port != NULL;
2148 
2149 	return device->sdev != NULL;
2150 }
2151 
2152 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
2153 	struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
2154 {
2155 	int rc;
2156 	unsigned int i;
2157 	unsigned long flags;
2158 	enum pqi_find_result find_result;
2159 	struct pqi_scsi_dev *device;
2160 	struct pqi_scsi_dev *next;
2161 	struct pqi_scsi_dev *matching_device;
2162 	LIST_HEAD(add_list);
2163 	LIST_HEAD(delete_list);
2164 
2165 	/*
2166 	 * The idea here is to do as little work as possible while holding the
2167 	 * spinlock.  That's why we go to great pains to defer anything other
2168 	 * than updating the internal device list until after we release the
2169 	 * spinlock.
2170 	 */
2171 
2172 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2173 
2174 	/* Assume that all devices in the existing list have gone away. */
2175 	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
2176 		device->device_gone = true;
2177 
2178 	for (i = 0; i < num_new_devices; i++) {
2179 		device = new_device_list[i];
2180 
2181 		find_result = pqi_scsi_find_entry(ctrl_info, device,
2182 			&matching_device);
2183 
2184 		switch (find_result) {
2185 		case DEVICE_SAME:
2186 			/*
2187 			 * The newly found device is already in the existing
2188 			 * device list.
2189 			 */
2190 			device->new_device = false;
2191 			matching_device->device_gone = false;
2192 			pqi_scsi_update_device(ctrl_info, matching_device, device);
2193 			break;
2194 		case DEVICE_NOT_FOUND:
2195 			/*
2196 			 * The newly found device is NOT in the existing device
2197 			 * list.
2198 			 */
2199 			device->new_device = true;
2200 			break;
2201 		case DEVICE_CHANGED:
2202 			/*
2203 			 * The original device has gone away and we need to add
2204 			 * the new device.
2205 			 */
2206 			device->new_device = true;
2207 			break;
2208 		}
2209 	}
2210 
2211 	/* Process all devices that have gone away. */
2212 	list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
2213 		scsi_device_list_entry) {
2214 		if (device->device_gone) {
2215 			list_del(&device->scsi_device_list_entry);
2216 			list_add_tail(&device->delete_list_entry, &delete_list);
2217 		}
2218 	}
2219 
2220 	/* Process all new devices. */
2221 	for (i = 0; i < num_new_devices; i++) {
2222 		device = new_device_list[i];
2223 		if (!device->new_device)
2224 			continue;
2225 		if (device->volume_offline)
2226 			continue;
2227 		list_add_tail(&device->scsi_device_list_entry,
2228 			&ctrl_info->scsi_device_list);
2229 		list_add_tail(&device->add_list_entry, &add_list);
2230 		/* To prevent this device structure from being freed later. */
2231 		device->keep_device = true;
2232 	}
2233 
2234 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2235 
2236 	/*
2237 	 * If OFA is in progress and there are devices that need to be deleted,
2238 	 * allow any pending reset operations to continue and unblock any SCSI
2239 	 * requests before removal.
2240 	 */
2241 	if (pqi_ofa_in_progress(ctrl_info)) {
2242 		list_for_each_entry_safe(device, next, &delete_list, delete_list_entry)
2243 			if (pqi_is_device_added(device))
2244 				pqi_device_remove_start(device);
2245 		pqi_ctrl_unblock_device_reset(ctrl_info);
2246 		pqi_scsi_unblock_requests(ctrl_info);
2247 	}
2248 
2249 	/* Remove all devices that have gone away. */
2250 	list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) {
2251 		if (device->volume_offline) {
2252 			pqi_dev_info(ctrl_info, "offline", device);
2253 			pqi_show_volume_status(ctrl_info, device);
2254 		} else {
2255 			pqi_dev_info(ctrl_info, "removed", device);
2256 		}
2257 		if (pqi_is_device_added(device))
2258 			pqi_remove_device(ctrl_info, device);
2259 		list_del(&device->delete_list_entry);
2260 		pqi_free_device(device);
2261 	}
2262 
2263 	/*
2264 	 * Notify the SML of any existing device changes such as;
2265 	 * queue depth, device size.
2266 	 */
2267 	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
2268 		if (device->sdev && device->queue_depth != device->advertised_queue_depth) {
2269 			device->advertised_queue_depth = device->queue_depth;
2270 			scsi_change_queue_depth(device->sdev, device->advertised_queue_depth);
2271 			if (device->rescan) {
2272 				scsi_rescan_device(&device->sdev->sdev_gendev);
2273 				device->rescan = false;
2274 			}
2275 		}
2276 	}
2277 
2278 	/* Expose any new devices. */
2279 	list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
2280 		if (!pqi_is_device_added(device)) {
2281 			rc = pqi_add_device(ctrl_info, device);
2282 			if (rc == 0) {
2283 				pqi_dev_info(ctrl_info, "added", device);
2284 			} else {
2285 				dev_warn(&ctrl_info->pci_dev->dev,
2286 					"scsi %d:%d:%d:%d addition failed, device not added\n",
2287 					ctrl_info->scsi_host->host_no,
2288 					device->bus, device->target,
2289 					device->lun);
2290 				pqi_fixup_botched_add(ctrl_info, device);
2291 			}
2292 		}
2293 	}
2294 
2295 	ctrl_info->logical_volume_rescan_needed = false;
2296 
2297 }
2298 
2299 static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device)
2300 {
2301 	/*
2302 	 * Only support the HBA controller itself as a RAID
2303 	 * controller.  If it's a RAID controller other than
2304 	 * the HBA itself (an external RAID controller, for
2305 	 * example), we don't support it.
2306 	 */
2307 	if (device->device_type == SA_DEVICE_TYPE_CONTROLLER &&
2308 		!pqi_is_hba_lunid(device->scsi3addr))
2309 			return false;
2310 
2311 	return true;
2312 }
2313 
2314 static inline bool pqi_skip_device(u8 *scsi3addr)
2315 {
2316 	/* Ignore all masked devices. */
2317 	if (MASKED_DEVICE(scsi3addr))
2318 		return true;
2319 
2320 	return false;
2321 }
2322 
2323 static inline void pqi_mask_device(u8 *scsi3addr)
2324 {
2325 	scsi3addr[3] |= 0xc0;
2326 }
2327 
2328 static inline bool pqi_is_multipath_device(struct pqi_scsi_dev *device)
2329 {
2330 	if (pqi_is_logical_device(device))
2331 		return false;
2332 
2333 	return (device->path_map & (device->path_map - 1)) != 0;
2334 }
2335 
2336 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
2337 {
2338 	return !device->is_physical_device || !pqi_skip_device(device->scsi3addr);
2339 }
2340 
2341 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2342 {
2343 	int i;
2344 	int rc;
2345 	LIST_HEAD(new_device_list_head);
2346 	struct report_phys_lun_16byte_wwid_list *physdev_list = NULL;
2347 	struct report_log_lun_list *logdev_list = NULL;
2348 	struct report_phys_lun_16byte_wwid *phys_lun;
2349 	struct report_log_lun *log_lun;
2350 	struct bmic_identify_physical_device *id_phys = NULL;
2351 	u32 num_physicals;
2352 	u32 num_logicals;
2353 	struct pqi_scsi_dev **new_device_list = NULL;
2354 	struct pqi_scsi_dev *device;
2355 	struct pqi_scsi_dev *next;
2356 	unsigned int num_new_devices;
2357 	unsigned int num_valid_devices;
2358 	bool is_physical_device;
2359 	u8 *scsi3addr;
2360 	unsigned int physical_index;
2361 	unsigned int logical_index;
2362 	static char *out_of_memory_msg =
2363 		"failed to allocate memory, device discovery stopped";
2364 
2365 	rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
2366 	if (rc)
2367 		goto out;
2368 
2369 	if (physdev_list)
2370 		num_physicals =
2371 			get_unaligned_be32(&physdev_list->header.list_length)
2372 				/ sizeof(physdev_list->lun_entries[0]);
2373 	else
2374 		num_physicals = 0;
2375 
2376 	if (logdev_list)
2377 		num_logicals =
2378 			get_unaligned_be32(&logdev_list->header.list_length)
2379 				/ sizeof(logdev_list->lun_entries[0]);
2380 	else
2381 		num_logicals = 0;
2382 
2383 	if (num_physicals) {
2384 		/*
2385 		 * We need this buffer for calls to pqi_get_physical_disk_info()
2386 		 * below.  We allocate it here instead of inside
2387 		 * pqi_get_physical_disk_info() because it's a fairly large
2388 		 * buffer.
2389 		 */
2390 		id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2391 		if (!id_phys) {
2392 			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2393 				out_of_memory_msg);
2394 			rc = -ENOMEM;
2395 			goto out;
2396 		}
2397 
2398 		if (pqi_hide_vsep) {
2399 			for (i = num_physicals - 1; i >= 0; i--) {
2400 				phys_lun = &physdev_list->lun_entries[i];
2401 				if (CISS_GET_DRIVE_NUMBER(phys_lun->lunid) == PQI_VSEP_CISS_BTL) {
2402 					pqi_mask_device(phys_lun->lunid);
2403 					break;
2404 				}
2405 			}
2406 		}
2407 	}
2408 
2409 	if (num_logicals &&
2410 		(logdev_list->header.flags & CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX))
2411 		ctrl_info->lv_drive_type_mix_valid = true;
2412 
2413 	num_new_devices = num_physicals + num_logicals;
2414 
2415 	new_device_list = kmalloc_array(num_new_devices,
2416 					sizeof(*new_device_list),
2417 					GFP_KERNEL);
2418 	if (!new_device_list) {
2419 		dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2420 		rc = -ENOMEM;
2421 		goto out;
2422 	}
2423 
2424 	for (i = 0; i < num_new_devices; i++) {
2425 		device = kzalloc(sizeof(*device), GFP_KERNEL);
2426 		if (!device) {
2427 			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2428 				out_of_memory_msg);
2429 			rc = -ENOMEM;
2430 			goto out;
2431 		}
2432 		list_add_tail(&device->new_device_list_entry,
2433 			&new_device_list_head);
2434 	}
2435 
2436 	device = NULL;
2437 	num_valid_devices = 0;
2438 	physical_index = 0;
2439 	logical_index = 0;
2440 
2441 	for (i = 0; i < num_new_devices; i++) {
2442 
2443 		if ((!pqi_expose_ld_first && i < num_physicals) ||
2444 			(pqi_expose_ld_first && i >= num_logicals)) {
2445 			is_physical_device = true;
2446 			phys_lun = &physdev_list->lun_entries[physical_index++];
2447 			log_lun = NULL;
2448 			scsi3addr = phys_lun->lunid;
2449 		} else {
2450 			is_physical_device = false;
2451 			phys_lun = NULL;
2452 			log_lun = &logdev_list->lun_entries[logical_index++];
2453 			scsi3addr = log_lun->lunid;
2454 		}
2455 
2456 		if (is_physical_device && pqi_skip_device(scsi3addr))
2457 			continue;
2458 
2459 		if (device)
2460 			device = list_next_entry(device, new_device_list_entry);
2461 		else
2462 			device = list_first_entry(&new_device_list_head,
2463 				struct pqi_scsi_dev, new_device_list_entry);
2464 
2465 		memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2466 		device->is_physical_device = is_physical_device;
2467 		if (is_physical_device) {
2468 			device->device_type = phys_lun->device_type;
2469 			if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
2470 				device->is_expander_smp_device = true;
2471 		} else {
2472 			device->is_external_raid_device =
2473 				pqi_is_external_raid_addr(scsi3addr);
2474 		}
2475 
2476 		if (!pqi_is_supported_device(device))
2477 			continue;
2478 
2479 		/* Do not present disks that the OS cannot fully probe */
2480 		if (pqi_keep_device_offline(ctrl_info, device))
2481 			continue;
2482 
2483 		/* Gather information about the device. */
2484 		rc = pqi_get_device_info(ctrl_info, device, id_phys);
2485 		if (rc == -ENOMEM) {
2486 			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2487 				out_of_memory_msg);
2488 			goto out;
2489 		}
2490 		if (rc) {
2491 			if (device->is_physical_device)
2492 				dev_warn(&ctrl_info->pci_dev->dev,
2493 					"obtaining device info failed, skipping physical device %016llx%016llx\n",
2494 					get_unaligned_be64(&phys_lun->wwid[0]),
2495 					get_unaligned_be64(&phys_lun->wwid[8]));
2496 			else
2497 				dev_warn(&ctrl_info->pci_dev->dev,
2498 					"obtaining device info failed, skipping logical device %08x%08x\n",
2499 					*((u32 *)&device->scsi3addr),
2500 					*((u32 *)&device->scsi3addr[4]));
2501 			rc = 0;
2502 			continue;
2503 		}
2504 
2505 		pqi_assign_bus_target_lun(device);
2506 
2507 		if (device->is_physical_device) {
2508 			memcpy(device->wwid, phys_lun->wwid, sizeof(device->wwid));
2509 			if ((phys_lun->device_flags &
2510 				CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
2511 				phys_lun->aio_handle) {
2512 					device->aio_enabled = true;
2513 					device->aio_handle =
2514 						phys_lun->aio_handle;
2515 			}
2516 		} else {
2517 			memcpy(device->volume_id, log_lun->volume_id,
2518 				sizeof(device->volume_id));
2519 		}
2520 
2521 		device->sas_address = get_unaligned_be64(&device->wwid[0]);
2522 
2523 		new_device_list[num_valid_devices++] = device;
2524 	}
2525 
2526 	pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2527 
2528 out:
2529 	list_for_each_entry_safe(device, next, &new_device_list_head,
2530 		new_device_list_entry) {
2531 		if (device->keep_device)
2532 			continue;
2533 		list_del(&device->new_device_list_entry);
2534 		pqi_free_device(device);
2535 	}
2536 
2537 	kfree(new_device_list);
2538 	kfree(physdev_list);
2539 	kfree(logdev_list);
2540 	kfree(id_phys);
2541 
2542 	return rc;
2543 }
2544 
2545 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2546 {
2547 	int rc;
2548 	int mutex_acquired;
2549 
2550 	if (pqi_ctrl_offline(ctrl_info))
2551 		return -ENXIO;
2552 
2553 	mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
2554 
2555 	if (!mutex_acquired) {
2556 		if (pqi_ctrl_scan_blocked(ctrl_info))
2557 			return -EBUSY;
2558 		pqi_schedule_rescan_worker_delayed(ctrl_info);
2559 		return -EINPROGRESS;
2560 	}
2561 
2562 	rc = pqi_update_scsi_devices(ctrl_info);
2563 	if (rc && !pqi_ctrl_scan_blocked(ctrl_info))
2564 		pqi_schedule_rescan_worker_delayed(ctrl_info);
2565 
2566 	mutex_unlock(&ctrl_info->scan_mutex);
2567 
2568 	return rc;
2569 }
2570 
2571 static void pqi_scan_start(struct Scsi_Host *shost)
2572 {
2573 	struct pqi_ctrl_info *ctrl_info;
2574 
2575 	ctrl_info = shost_to_hba(shost);
2576 
2577 	pqi_scan_scsi_devices(ctrl_info);
2578 }
2579 
2580 /* Returns TRUE if scan is finished. */
2581 
2582 static int pqi_scan_finished(struct Scsi_Host *shost,
2583 	unsigned long elapsed_time)
2584 {
2585 	struct pqi_ctrl_info *ctrl_info;
2586 
2587 	ctrl_info = shost_priv(shost);
2588 
2589 	return !mutex_is_locked(&ctrl_info->scan_mutex);
2590 }
2591 
2592 static inline void pqi_set_encryption_info(struct pqi_encryption_info *encryption_info,
2593 	struct raid_map *raid_map, u64 first_block)
2594 {
2595 	u32 volume_blk_size;
2596 
2597 	/*
2598 	 * Set the encryption tweak values based on logical block address.
2599 	 * If the block size is 512, the tweak value is equal to the LBA.
2600 	 * For other block sizes, tweak value is (LBA * block size) / 512.
2601 	 */
2602 	volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2603 	if (volume_blk_size != 512)
2604 		first_block = (first_block * volume_blk_size) / 512;
2605 
2606 	encryption_info->data_encryption_key_index =
2607 		get_unaligned_le16(&raid_map->data_encryption_key_index);
2608 	encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2609 	encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2610 }
2611 
2612 /*
2613  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2614  */
2615 
2616 static bool pqi_aio_raid_level_supported(struct pqi_ctrl_info *ctrl_info,
2617 	struct pqi_scsi_dev_raid_map_data *rmd)
2618 {
2619 	bool is_supported = true;
2620 
2621 	switch (rmd->raid_level) {
2622 	case SA_RAID_0:
2623 		break;
2624 	case SA_RAID_1:
2625 		if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2626 			rmd->data_length > ctrl_info->max_write_raid_1_10_2drive))
2627 			is_supported = false;
2628 		break;
2629 	case SA_RAID_TRIPLE:
2630 		if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2631 			rmd->data_length > ctrl_info->max_write_raid_1_10_3drive))
2632 			is_supported = false;
2633 		break;
2634 	case SA_RAID_5:
2635 		if (rmd->is_write && (!ctrl_info->enable_r5_writes ||
2636 			rmd->data_length > ctrl_info->max_write_raid_5_6))
2637 			is_supported = false;
2638 		break;
2639 	case SA_RAID_6:
2640 		if (rmd->is_write && (!ctrl_info->enable_r6_writes ||
2641 			rmd->data_length > ctrl_info->max_write_raid_5_6))
2642 			is_supported = false;
2643 		break;
2644 	default:
2645 		is_supported = false;
2646 		break;
2647 	}
2648 
2649 	return is_supported;
2650 }
2651 
2652 #define PQI_RAID_BYPASS_INELIGIBLE	1
2653 
2654 static int pqi_get_aio_lba_and_block_count(struct scsi_cmnd *scmd,
2655 	struct pqi_scsi_dev_raid_map_data *rmd)
2656 {
2657 	/* Check for valid opcode, get LBA and block count. */
2658 	switch (scmd->cmnd[0]) {
2659 	case WRITE_6:
2660 		rmd->is_write = true;
2661 		fallthrough;
2662 	case READ_6:
2663 		rmd->first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2664 			(scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2665 		rmd->block_cnt = (u32)scmd->cmnd[4];
2666 		if (rmd->block_cnt == 0)
2667 			rmd->block_cnt = 256;
2668 		break;
2669 	case WRITE_10:
2670 		rmd->is_write = true;
2671 		fallthrough;
2672 	case READ_10:
2673 		rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2674 		rmd->block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2675 		break;
2676 	case WRITE_12:
2677 		rmd->is_write = true;
2678 		fallthrough;
2679 	case READ_12:
2680 		rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2681 		rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2682 		break;
2683 	case WRITE_16:
2684 		rmd->is_write = true;
2685 		fallthrough;
2686 	case READ_16:
2687 		rmd->first_block = get_unaligned_be64(&scmd->cmnd[2]);
2688 		rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2689 		break;
2690 	default:
2691 		/* Process via normal I/O path. */
2692 		return PQI_RAID_BYPASS_INELIGIBLE;
2693 	}
2694 
2695 	put_unaligned_le32(scsi_bufflen(scmd), &rmd->data_length);
2696 
2697 	return 0;
2698 }
2699 
2700 static int pci_get_aio_common_raid_map_values(struct pqi_ctrl_info *ctrl_info,
2701 	struct pqi_scsi_dev_raid_map_data *rmd, struct raid_map *raid_map)
2702 {
2703 #if BITS_PER_LONG == 32
2704 	u64 tmpdiv;
2705 #endif
2706 
2707 	rmd->last_block = rmd->first_block + rmd->block_cnt - 1;
2708 
2709 	/* Check for invalid block or wraparound. */
2710 	if (rmd->last_block >=
2711 		get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2712 		rmd->last_block < rmd->first_block)
2713 		return PQI_RAID_BYPASS_INELIGIBLE;
2714 
2715 	rmd->data_disks_per_row =
2716 		get_unaligned_le16(&raid_map->data_disks_per_row);
2717 	rmd->strip_size = get_unaligned_le16(&raid_map->strip_size);
2718 	rmd->layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2719 
2720 	/* Calculate stripe information for the request. */
2721 	rmd->blocks_per_row = rmd->data_disks_per_row * rmd->strip_size;
2722 	if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2723 		return PQI_RAID_BYPASS_INELIGIBLE;
2724 #if BITS_PER_LONG == 32
2725 	tmpdiv = rmd->first_block;
2726 	do_div(tmpdiv, rmd->blocks_per_row);
2727 	rmd->first_row = tmpdiv;
2728 	tmpdiv = rmd->last_block;
2729 	do_div(tmpdiv, rmd->blocks_per_row);
2730 	rmd->last_row = tmpdiv;
2731 	rmd->first_row_offset = (u32)(rmd->first_block - (rmd->first_row * rmd->blocks_per_row));
2732 	rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row * rmd->blocks_per_row));
2733 	tmpdiv = rmd->first_row_offset;
2734 	do_div(tmpdiv, rmd->strip_size);
2735 	rmd->first_column = tmpdiv;
2736 	tmpdiv = rmd->last_row_offset;
2737 	do_div(tmpdiv, rmd->strip_size);
2738 	rmd->last_column = tmpdiv;
2739 #else
2740 	rmd->first_row = rmd->first_block / rmd->blocks_per_row;
2741 	rmd->last_row = rmd->last_block / rmd->blocks_per_row;
2742 	rmd->first_row_offset = (u32)(rmd->first_block -
2743 		(rmd->first_row * rmd->blocks_per_row));
2744 	rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row *
2745 		rmd->blocks_per_row));
2746 	rmd->first_column = rmd->first_row_offset / rmd->strip_size;
2747 	rmd->last_column = rmd->last_row_offset / rmd->strip_size;
2748 #endif
2749 
2750 	/* If this isn't a single row/column then give to the controller. */
2751 	if (rmd->first_row != rmd->last_row ||
2752 		rmd->first_column != rmd->last_column)
2753 		return PQI_RAID_BYPASS_INELIGIBLE;
2754 
2755 	/* Proceeding with driver mapping. */
2756 	rmd->total_disks_per_row = rmd->data_disks_per_row +
2757 		get_unaligned_le16(&raid_map->metadata_disks_per_row);
2758 	rmd->map_row = ((u32)(rmd->first_row >>
2759 		raid_map->parity_rotation_shift)) %
2760 		get_unaligned_le16(&raid_map->row_cnt);
2761 	rmd->map_index = (rmd->map_row * rmd->total_disks_per_row) +
2762 		rmd->first_column;
2763 
2764 	return 0;
2765 }
2766 
2767 static int pqi_calc_aio_r5_or_r6(struct pqi_scsi_dev_raid_map_data *rmd,
2768 	struct raid_map *raid_map)
2769 {
2770 #if BITS_PER_LONG == 32
2771 	u64 tmpdiv;
2772 #endif
2773 
2774 	if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2775 		return PQI_RAID_BYPASS_INELIGIBLE;
2776 
2777 	/* RAID 50/60 */
2778 	/* Verify first and last block are in same RAID group. */
2779 	rmd->stripesize = rmd->blocks_per_row * rmd->layout_map_count;
2780 #if BITS_PER_LONG == 32
2781 	tmpdiv = rmd->first_block;
2782 	rmd->first_group = do_div(tmpdiv, rmd->stripesize);
2783 	tmpdiv = rmd->first_group;
2784 	do_div(tmpdiv, rmd->blocks_per_row);
2785 	rmd->first_group = tmpdiv;
2786 	tmpdiv = rmd->last_block;
2787 	rmd->last_group = do_div(tmpdiv, rmd->stripesize);
2788 	tmpdiv = rmd->last_group;
2789 	do_div(tmpdiv, rmd->blocks_per_row);
2790 	rmd->last_group = tmpdiv;
2791 #else
2792 	rmd->first_group = (rmd->first_block % rmd->stripesize) / rmd->blocks_per_row;
2793 	rmd->last_group = (rmd->last_block % rmd->stripesize) / rmd->blocks_per_row;
2794 #endif
2795 	if (rmd->first_group != rmd->last_group)
2796 		return PQI_RAID_BYPASS_INELIGIBLE;
2797 
2798 	/* Verify request is in a single row of RAID 5/6. */
2799 #if BITS_PER_LONG == 32
2800 	tmpdiv = rmd->first_block;
2801 	do_div(tmpdiv, rmd->stripesize);
2802 	rmd->first_row = tmpdiv;
2803 	rmd->r5or6_first_row = tmpdiv;
2804 	tmpdiv = rmd->last_block;
2805 	do_div(tmpdiv, rmd->stripesize);
2806 	rmd->r5or6_last_row = tmpdiv;
2807 #else
2808 	rmd->first_row = rmd->r5or6_first_row =
2809 		rmd->first_block / rmd->stripesize;
2810 	rmd->r5or6_last_row = rmd->last_block / rmd->stripesize;
2811 #endif
2812 	if (rmd->r5or6_first_row != rmd->r5or6_last_row)
2813 		return PQI_RAID_BYPASS_INELIGIBLE;
2814 
2815 	/* Verify request is in a single column. */
2816 #if BITS_PER_LONG == 32
2817 	tmpdiv = rmd->first_block;
2818 	rmd->first_row_offset = do_div(tmpdiv, rmd->stripesize);
2819 	tmpdiv = rmd->first_row_offset;
2820 	rmd->first_row_offset = (u32)do_div(tmpdiv, rmd->blocks_per_row);
2821 	rmd->r5or6_first_row_offset = rmd->first_row_offset;
2822 	tmpdiv = rmd->last_block;
2823 	rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->stripesize);
2824 	tmpdiv = rmd->r5or6_last_row_offset;
2825 	rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->blocks_per_row);
2826 	tmpdiv = rmd->r5or6_first_row_offset;
2827 	do_div(tmpdiv, rmd->strip_size);
2828 	rmd->first_column = rmd->r5or6_first_column = tmpdiv;
2829 	tmpdiv = rmd->r5or6_last_row_offset;
2830 	do_div(tmpdiv, rmd->strip_size);
2831 	rmd->r5or6_last_column = tmpdiv;
2832 #else
2833 	rmd->first_row_offset = rmd->r5or6_first_row_offset =
2834 		(u32)((rmd->first_block % rmd->stripesize) %
2835 		rmd->blocks_per_row);
2836 
2837 	rmd->r5or6_last_row_offset =
2838 		(u32)((rmd->last_block % rmd->stripesize) %
2839 		rmd->blocks_per_row);
2840 
2841 	rmd->first_column =
2842 		rmd->r5or6_first_row_offset / rmd->strip_size;
2843 	rmd->r5or6_first_column = rmd->first_column;
2844 	rmd->r5or6_last_column = rmd->r5or6_last_row_offset / rmd->strip_size;
2845 #endif
2846 	if (rmd->r5or6_first_column != rmd->r5or6_last_column)
2847 		return PQI_RAID_BYPASS_INELIGIBLE;
2848 
2849 	/* Request is eligible. */
2850 	rmd->map_row =
2851 		((u32)(rmd->first_row >> raid_map->parity_rotation_shift)) %
2852 		get_unaligned_le16(&raid_map->row_cnt);
2853 
2854 	rmd->map_index = (rmd->first_group *
2855 		(get_unaligned_le16(&raid_map->row_cnt) *
2856 		rmd->total_disks_per_row)) +
2857 		(rmd->map_row * rmd->total_disks_per_row) + rmd->first_column;
2858 
2859 	if (rmd->is_write) {
2860 		u32 index;
2861 
2862 		/*
2863 		 * p_parity_it_nexus and q_parity_it_nexus are pointers to the
2864 		 * parity entries inside the device's raid_map.
2865 		 *
2866 		 * A device's RAID map is bounded by: number of RAID disks squared.
2867 		 *
2868 		 * The devices RAID map size is checked during device
2869 		 * initialization.
2870 		 */
2871 		index = DIV_ROUND_UP(rmd->map_index + 1, rmd->total_disks_per_row);
2872 		index *= rmd->total_disks_per_row;
2873 		index -= get_unaligned_le16(&raid_map->metadata_disks_per_row);
2874 
2875 		rmd->p_parity_it_nexus = raid_map->disk_data[index].aio_handle;
2876 		if (rmd->raid_level == SA_RAID_6) {
2877 			rmd->q_parity_it_nexus = raid_map->disk_data[index + 1].aio_handle;
2878 			rmd->xor_mult = raid_map->disk_data[rmd->map_index].xor_mult[1];
2879 		}
2880 #if BITS_PER_LONG == 32
2881 		tmpdiv = rmd->first_block;
2882 		do_div(tmpdiv, rmd->blocks_per_row);
2883 		rmd->row = tmpdiv;
2884 #else
2885 		rmd->row = rmd->first_block / rmd->blocks_per_row;
2886 #endif
2887 	}
2888 
2889 	return 0;
2890 }
2891 
2892 static void pqi_set_aio_cdb(struct pqi_scsi_dev_raid_map_data *rmd)
2893 {
2894 	/* Build the new CDB for the physical disk I/O. */
2895 	if (rmd->disk_block > 0xffffffff) {
2896 		rmd->cdb[0] = rmd->is_write ? WRITE_16 : READ_16;
2897 		rmd->cdb[1] = 0;
2898 		put_unaligned_be64(rmd->disk_block, &rmd->cdb[2]);
2899 		put_unaligned_be32(rmd->disk_block_cnt, &rmd->cdb[10]);
2900 		rmd->cdb[14] = 0;
2901 		rmd->cdb[15] = 0;
2902 		rmd->cdb_length = 16;
2903 	} else {
2904 		rmd->cdb[0] = rmd->is_write ? WRITE_10 : READ_10;
2905 		rmd->cdb[1] = 0;
2906 		put_unaligned_be32((u32)rmd->disk_block, &rmd->cdb[2]);
2907 		rmd->cdb[6] = 0;
2908 		put_unaligned_be16((u16)rmd->disk_block_cnt, &rmd->cdb[7]);
2909 		rmd->cdb[9] = 0;
2910 		rmd->cdb_length = 10;
2911 	}
2912 }
2913 
2914 static void pqi_calc_aio_r1_nexus(struct raid_map *raid_map,
2915 	struct pqi_scsi_dev_raid_map_data *rmd)
2916 {
2917 	u32 index;
2918 	u32 group;
2919 
2920 	group = rmd->map_index / rmd->data_disks_per_row;
2921 
2922 	index = rmd->map_index - (group * rmd->data_disks_per_row);
2923 	rmd->it_nexus[0] = raid_map->disk_data[index].aio_handle;
2924 	index += rmd->data_disks_per_row;
2925 	rmd->it_nexus[1] = raid_map->disk_data[index].aio_handle;
2926 	if (rmd->layout_map_count > 2) {
2927 		index += rmd->data_disks_per_row;
2928 		rmd->it_nexus[2] = raid_map->disk_data[index].aio_handle;
2929 	}
2930 
2931 	rmd->num_it_nexus_entries = rmd->layout_map_count;
2932 }
2933 
2934 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2935 	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2936 	struct pqi_queue_group *queue_group)
2937 {
2938 	int rc;
2939 	struct raid_map *raid_map;
2940 	u32 group;
2941 	u32 next_bypass_group;
2942 	struct pqi_encryption_info *encryption_info_ptr;
2943 	struct pqi_encryption_info encryption_info;
2944 	struct pqi_scsi_dev_raid_map_data rmd = { 0 };
2945 
2946 	rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
2947 	if (rc)
2948 		return PQI_RAID_BYPASS_INELIGIBLE;
2949 
2950 	rmd.raid_level = device->raid_level;
2951 
2952 	if (!pqi_aio_raid_level_supported(ctrl_info, &rmd))
2953 		return PQI_RAID_BYPASS_INELIGIBLE;
2954 
2955 	if (unlikely(rmd.block_cnt == 0))
2956 		return PQI_RAID_BYPASS_INELIGIBLE;
2957 
2958 	raid_map = device->raid_map;
2959 
2960 	rc = pci_get_aio_common_raid_map_values(ctrl_info, &rmd, raid_map);
2961 	if (rc)
2962 		return PQI_RAID_BYPASS_INELIGIBLE;
2963 
2964 	if (device->raid_level == SA_RAID_1 ||
2965 		device->raid_level == SA_RAID_TRIPLE) {
2966 		if (rmd.is_write) {
2967 			pqi_calc_aio_r1_nexus(raid_map, &rmd);
2968 		} else {
2969 			group = device->next_bypass_group[rmd.map_index];
2970 			next_bypass_group = group + 1;
2971 			if (next_bypass_group >= rmd.layout_map_count)
2972 				next_bypass_group = 0;
2973 			device->next_bypass_group[rmd.map_index] = next_bypass_group;
2974 			rmd.map_index += group * rmd.data_disks_per_row;
2975 		}
2976 	} else if ((device->raid_level == SA_RAID_5 ||
2977 		device->raid_level == SA_RAID_6) &&
2978 		(rmd.layout_map_count > 1 || rmd.is_write)) {
2979 		rc = pqi_calc_aio_r5_or_r6(&rmd, raid_map);
2980 		if (rc)
2981 			return PQI_RAID_BYPASS_INELIGIBLE;
2982 	}
2983 
2984 	if (unlikely(rmd.map_index >= RAID_MAP_MAX_ENTRIES))
2985 		return PQI_RAID_BYPASS_INELIGIBLE;
2986 
2987 	rmd.aio_handle = raid_map->disk_data[rmd.map_index].aio_handle;
2988 	rmd.disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2989 		rmd.first_row * rmd.strip_size +
2990 		(rmd.first_row_offset - rmd.first_column * rmd.strip_size);
2991 	rmd.disk_block_cnt = rmd.block_cnt;
2992 
2993 	/* Handle differing logical/physical block sizes. */
2994 	if (raid_map->phys_blk_shift) {
2995 		rmd.disk_block <<= raid_map->phys_blk_shift;
2996 		rmd.disk_block_cnt <<= raid_map->phys_blk_shift;
2997 	}
2998 
2999 	if (unlikely(rmd.disk_block_cnt > 0xffff))
3000 		return PQI_RAID_BYPASS_INELIGIBLE;
3001 
3002 	pqi_set_aio_cdb(&rmd);
3003 
3004 	if (get_unaligned_le16(&raid_map->flags) & RAID_MAP_ENCRYPTION_ENABLED) {
3005 		if (rmd.data_length > device->max_transfer_encrypted)
3006 			return PQI_RAID_BYPASS_INELIGIBLE;
3007 		pqi_set_encryption_info(&encryption_info, raid_map, rmd.first_block);
3008 		encryption_info_ptr = &encryption_info;
3009 	} else {
3010 		encryption_info_ptr = NULL;
3011 	}
3012 
3013 	if (rmd.is_write) {
3014 		switch (device->raid_level) {
3015 		case SA_RAID_1:
3016 		case SA_RAID_TRIPLE:
3017 			return pqi_aio_submit_r1_write_io(ctrl_info, scmd, queue_group,
3018 				encryption_info_ptr, device, &rmd);
3019 		case SA_RAID_5:
3020 		case SA_RAID_6:
3021 			return pqi_aio_submit_r56_write_io(ctrl_info, scmd, queue_group,
3022 				encryption_info_ptr, device, &rmd);
3023 		}
3024 	}
3025 
3026 	return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
3027 		rmd.cdb, rmd.cdb_length, queue_group,
3028 		encryption_info_ptr, true, false);
3029 }
3030 
3031 #define PQI_STATUS_IDLE		0x0
3032 
3033 #define PQI_CREATE_ADMIN_QUEUE_PAIR	1
3034 #define PQI_DELETE_ADMIN_QUEUE_PAIR	2
3035 
3036 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET		0x0
3037 #define PQI_DEVICE_STATE_STATUS_AVAILABLE		0x1
3038 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY		0x2
3039 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY		0x3
3040 #define PQI_DEVICE_STATE_ERROR				0x4
3041 
3042 #define PQI_MODE_READY_TIMEOUT_SECS		30
3043 #define PQI_MODE_READY_POLL_INTERVAL_MSECS	1
3044 
3045 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
3046 {
3047 	struct pqi_device_registers __iomem *pqi_registers;
3048 	unsigned long timeout;
3049 	u64 signature;
3050 	u8 status;
3051 
3052 	pqi_registers = ctrl_info->pqi_registers;
3053 	timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
3054 
3055 	while (1) {
3056 		signature = readq(&pqi_registers->signature);
3057 		if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
3058 			sizeof(signature)) == 0)
3059 			break;
3060 		if (time_after(jiffies, timeout)) {
3061 			dev_err(&ctrl_info->pci_dev->dev,
3062 				"timed out waiting for PQI signature\n");
3063 			return -ETIMEDOUT;
3064 		}
3065 		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3066 	}
3067 
3068 	while (1) {
3069 		status = readb(&pqi_registers->function_and_status_code);
3070 		if (status == PQI_STATUS_IDLE)
3071 			break;
3072 		if (time_after(jiffies, timeout)) {
3073 			dev_err(&ctrl_info->pci_dev->dev,
3074 				"timed out waiting for PQI IDLE\n");
3075 			return -ETIMEDOUT;
3076 		}
3077 		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3078 	}
3079 
3080 	while (1) {
3081 		if (readl(&pqi_registers->device_status) ==
3082 			PQI_DEVICE_STATE_ALL_REGISTERS_READY)
3083 			break;
3084 		if (time_after(jiffies, timeout)) {
3085 			dev_err(&ctrl_info->pci_dev->dev,
3086 				"timed out waiting for PQI all registers ready\n");
3087 			return -ETIMEDOUT;
3088 		}
3089 		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3090 	}
3091 
3092 	return 0;
3093 }
3094 
3095 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
3096 {
3097 	struct pqi_scsi_dev *device;
3098 
3099 	device = io_request->scmd->device->hostdata;
3100 	device->raid_bypass_enabled = false;
3101 	device->aio_enabled = false;
3102 }
3103 
3104 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
3105 {
3106 	struct pqi_ctrl_info *ctrl_info;
3107 	struct pqi_scsi_dev *device;
3108 
3109 	device = sdev->hostdata;
3110 	if (device->device_offline)
3111 		return;
3112 
3113 	device->device_offline = true;
3114 	ctrl_info = shost_to_hba(sdev->host);
3115 	pqi_schedule_rescan_worker(ctrl_info);
3116 	dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
3117 		path, ctrl_info->scsi_host->host_no, device->bus,
3118 		device->target, device->lun);
3119 }
3120 
3121 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
3122 {
3123 	u8 scsi_status;
3124 	u8 host_byte;
3125 	struct scsi_cmnd *scmd;
3126 	struct pqi_raid_error_info *error_info;
3127 	size_t sense_data_length;
3128 	int residual_count;
3129 	int xfer_count;
3130 	struct scsi_sense_hdr sshdr;
3131 
3132 	scmd = io_request->scmd;
3133 	if (!scmd)
3134 		return;
3135 
3136 	error_info = io_request->error_info;
3137 	scsi_status = error_info->status;
3138 	host_byte = DID_OK;
3139 
3140 	switch (error_info->data_out_result) {
3141 	case PQI_DATA_IN_OUT_GOOD:
3142 		break;
3143 	case PQI_DATA_IN_OUT_UNDERFLOW:
3144 		xfer_count =
3145 			get_unaligned_le32(&error_info->data_out_transferred);
3146 		residual_count = scsi_bufflen(scmd) - xfer_count;
3147 		scsi_set_resid(scmd, residual_count);
3148 		if (xfer_count < scmd->underflow)
3149 			host_byte = DID_SOFT_ERROR;
3150 		break;
3151 	case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
3152 	case PQI_DATA_IN_OUT_ABORTED:
3153 		host_byte = DID_ABORT;
3154 		break;
3155 	case PQI_DATA_IN_OUT_TIMEOUT:
3156 		host_byte = DID_TIME_OUT;
3157 		break;
3158 	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
3159 	case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
3160 	case PQI_DATA_IN_OUT_BUFFER_ERROR:
3161 	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
3162 	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
3163 	case PQI_DATA_IN_OUT_ERROR:
3164 	case PQI_DATA_IN_OUT_HARDWARE_ERROR:
3165 	case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
3166 	case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
3167 	case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
3168 	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
3169 	case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
3170 	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
3171 	case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
3172 	case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
3173 	case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
3174 	default:
3175 		host_byte = DID_ERROR;
3176 		break;
3177 	}
3178 
3179 	sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
3180 	if (sense_data_length == 0)
3181 		sense_data_length =
3182 			get_unaligned_le16(&error_info->response_data_length);
3183 	if (sense_data_length) {
3184 		if (sense_data_length > sizeof(error_info->data))
3185 			sense_data_length = sizeof(error_info->data);
3186 
3187 		if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3188 			scsi_normalize_sense(error_info->data,
3189 				sense_data_length, &sshdr) &&
3190 				sshdr.sense_key == HARDWARE_ERROR &&
3191 				sshdr.asc == 0x3e) {
3192 			struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
3193 			struct pqi_scsi_dev *device = scmd->device->hostdata;
3194 
3195 			switch (sshdr.ascq) {
3196 			case 0x1: /* LOGICAL UNIT FAILURE */
3197 				if (printk_ratelimit())
3198 					scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
3199 						ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3200 				pqi_take_device_offline(scmd->device, "RAID");
3201 				host_byte = DID_NO_CONNECT;
3202 				break;
3203 
3204 			default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
3205 				if (printk_ratelimit())
3206 					scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
3207 						sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3208 				break;
3209 			}
3210 		}
3211 
3212 		if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3213 			sense_data_length = SCSI_SENSE_BUFFERSIZE;
3214 		memcpy(scmd->sense_buffer, error_info->data,
3215 			sense_data_length);
3216 	}
3217 
3218 	scmd->result = scsi_status;
3219 	set_host_byte(scmd, host_byte);
3220 }
3221 
3222 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
3223 {
3224 	u8 scsi_status;
3225 	u8 host_byte;
3226 	struct scsi_cmnd *scmd;
3227 	struct pqi_aio_error_info *error_info;
3228 	size_t sense_data_length;
3229 	int residual_count;
3230 	int xfer_count;
3231 	bool device_offline;
3232 	struct pqi_scsi_dev *device;
3233 
3234 	scmd = io_request->scmd;
3235 	error_info = io_request->error_info;
3236 	host_byte = DID_OK;
3237 	sense_data_length = 0;
3238 	device_offline = false;
3239 	device = scmd->device->hostdata;
3240 
3241 	switch (error_info->service_response) {
3242 	case PQI_AIO_SERV_RESPONSE_COMPLETE:
3243 		scsi_status = error_info->status;
3244 		break;
3245 	case PQI_AIO_SERV_RESPONSE_FAILURE:
3246 		switch (error_info->status) {
3247 		case PQI_AIO_STATUS_IO_ABORTED:
3248 			scsi_status = SAM_STAT_TASK_ABORTED;
3249 			break;
3250 		case PQI_AIO_STATUS_UNDERRUN:
3251 			scsi_status = SAM_STAT_GOOD;
3252 			residual_count = get_unaligned_le32(
3253 						&error_info->residual_count);
3254 			scsi_set_resid(scmd, residual_count);
3255 			xfer_count = scsi_bufflen(scmd) - residual_count;
3256 			if (xfer_count < scmd->underflow)
3257 				host_byte = DID_SOFT_ERROR;
3258 			break;
3259 		case PQI_AIO_STATUS_OVERRUN:
3260 			scsi_status = SAM_STAT_GOOD;
3261 			break;
3262 		case PQI_AIO_STATUS_AIO_PATH_DISABLED:
3263 			pqi_aio_path_disabled(io_request);
3264 			if (pqi_is_multipath_device(device)) {
3265 				pqi_device_remove_start(device);
3266 				host_byte = DID_NO_CONNECT;
3267 				scsi_status = SAM_STAT_CHECK_CONDITION;
3268 			} else {
3269 				scsi_status = SAM_STAT_GOOD;
3270 				io_request->status = -EAGAIN;
3271 			}
3272 			break;
3273 		case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
3274 		case PQI_AIO_STATUS_INVALID_DEVICE:
3275 			if (!io_request->raid_bypass) {
3276 				device_offline = true;
3277 				pqi_take_device_offline(scmd->device, "AIO");
3278 				host_byte = DID_NO_CONNECT;
3279 			}
3280 			scsi_status = SAM_STAT_CHECK_CONDITION;
3281 			break;
3282 		case PQI_AIO_STATUS_IO_ERROR:
3283 		default:
3284 			scsi_status = SAM_STAT_CHECK_CONDITION;
3285 			break;
3286 		}
3287 		break;
3288 	case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
3289 	case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
3290 		scsi_status = SAM_STAT_GOOD;
3291 		break;
3292 	case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
3293 	case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
3294 	default:
3295 		scsi_status = SAM_STAT_CHECK_CONDITION;
3296 		break;
3297 	}
3298 
3299 	if (error_info->data_present) {
3300 		sense_data_length =
3301 			get_unaligned_le16(&error_info->data_length);
3302 		if (sense_data_length) {
3303 			if (sense_data_length > sizeof(error_info->data))
3304 				sense_data_length = sizeof(error_info->data);
3305 			if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3306 				sense_data_length = SCSI_SENSE_BUFFERSIZE;
3307 			memcpy(scmd->sense_buffer, error_info->data,
3308 				sense_data_length);
3309 		}
3310 	}
3311 
3312 	if (device_offline && sense_data_length == 0)
3313 		scsi_build_sense(scmd, 0, HARDWARE_ERROR, 0x3e, 0x1);
3314 
3315 	scmd->result = scsi_status;
3316 	set_host_byte(scmd, host_byte);
3317 }
3318 
3319 static void pqi_process_io_error(unsigned int iu_type,
3320 	struct pqi_io_request *io_request)
3321 {
3322 	switch (iu_type) {
3323 	case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3324 		pqi_process_raid_io_error(io_request);
3325 		break;
3326 	case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3327 		pqi_process_aio_io_error(io_request);
3328 		break;
3329 	}
3330 }
3331 
3332 static int pqi_interpret_task_management_response(struct pqi_ctrl_info *ctrl_info,
3333 	struct pqi_task_management_response *response)
3334 {
3335 	int rc;
3336 
3337 	switch (response->response_code) {
3338 	case SOP_TMF_COMPLETE:
3339 	case SOP_TMF_FUNCTION_SUCCEEDED:
3340 		rc = 0;
3341 		break;
3342 	case SOP_TMF_REJECTED:
3343 		rc = -EAGAIN;
3344 		break;
3345 	case SOP_RC_INCORRECT_LOGICAL_UNIT:
3346 		rc = -ENODEV;
3347 		break;
3348 	default:
3349 		rc = -EIO;
3350 		break;
3351 	}
3352 
3353 	if (rc)
3354 		dev_err(&ctrl_info->pci_dev->dev,
3355 			"Task Management Function error: %d (response code: %u)\n", rc, response->response_code);
3356 
3357 	return rc;
3358 }
3359 
3360 static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info,
3361 	enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
3362 {
3363 	pqi_take_ctrl_offline(ctrl_info, ctrl_shutdown_reason);
3364 }
3365 
3366 static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group)
3367 {
3368 	int num_responses;
3369 	pqi_index_t oq_pi;
3370 	pqi_index_t oq_ci;
3371 	struct pqi_io_request *io_request;
3372 	struct pqi_io_response *response;
3373 	u16 request_id;
3374 
3375 	num_responses = 0;
3376 	oq_ci = queue_group->oq_ci_copy;
3377 
3378 	while (1) {
3379 		oq_pi = readl(queue_group->oq_pi);
3380 		if (oq_pi >= ctrl_info->num_elements_per_oq) {
3381 			pqi_invalid_response(ctrl_info, PQI_IO_PI_OUT_OF_RANGE);
3382 			dev_err(&ctrl_info->pci_dev->dev,
3383 				"I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3384 				oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci);
3385 			return -1;
3386 		}
3387 		if (oq_pi == oq_ci)
3388 			break;
3389 
3390 		num_responses++;
3391 		response = queue_group->oq_element_array +
3392 			(oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3393 
3394 		request_id = get_unaligned_le16(&response->request_id);
3395 		if (request_id >= ctrl_info->max_io_slots) {
3396 			pqi_invalid_response(ctrl_info, PQI_INVALID_REQ_ID);
3397 			dev_err(&ctrl_info->pci_dev->dev,
3398 				"request ID in response (%u) out of range (0-%u): producer index: %u  consumer index: %u\n",
3399 				request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci);
3400 			return -1;
3401 		}
3402 
3403 		io_request = &ctrl_info->io_request_pool[request_id];
3404 		if (atomic_read(&io_request->refcount) == 0) {
3405 			pqi_invalid_response(ctrl_info, PQI_UNMATCHED_REQ_ID);
3406 			dev_err(&ctrl_info->pci_dev->dev,
3407 				"request ID in response (%u) does not match an outstanding I/O request: producer index: %u  consumer index: %u\n",
3408 				request_id, oq_pi, oq_ci);
3409 			return -1;
3410 		}
3411 
3412 		switch (response->header.iu_type) {
3413 		case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
3414 		case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
3415 			if (io_request->scmd)
3416 				io_request->scmd->result = 0;
3417 			fallthrough;
3418 		case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
3419 			break;
3420 		case PQI_RESPONSE_IU_VENDOR_GENERAL:
3421 			io_request->status =
3422 				get_unaligned_le16(
3423 				&((struct pqi_vendor_general_response *)response)->status);
3424 			break;
3425 		case PQI_RESPONSE_IU_TASK_MANAGEMENT:
3426 			io_request->status = pqi_interpret_task_management_response(ctrl_info,
3427 				(void *)response);
3428 			break;
3429 		case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
3430 			pqi_aio_path_disabled(io_request);
3431 			io_request->status = -EAGAIN;
3432 			break;
3433 		case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3434 		case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3435 			io_request->error_info = ctrl_info->error_buffer +
3436 				(get_unaligned_le16(&response->error_index) *
3437 				PQI_ERROR_BUFFER_ELEMENT_LENGTH);
3438 			pqi_process_io_error(response->header.iu_type, io_request);
3439 			break;
3440 		default:
3441 			pqi_invalid_response(ctrl_info, PQI_UNEXPECTED_IU_TYPE);
3442 			dev_err(&ctrl_info->pci_dev->dev,
3443 				"unexpected IU type: 0x%x: producer index: %u  consumer index: %u\n",
3444 				response->header.iu_type, oq_pi, oq_ci);
3445 			return -1;
3446 		}
3447 
3448 		io_request->io_complete_callback(io_request, io_request->context);
3449 
3450 		/*
3451 		 * Note that the I/O request structure CANNOT BE TOUCHED after
3452 		 * returning from the I/O completion callback!
3453 		 */
3454 		oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
3455 	}
3456 
3457 	if (num_responses) {
3458 		queue_group->oq_ci_copy = oq_ci;
3459 		writel(oq_ci, queue_group->oq_ci);
3460 	}
3461 
3462 	return num_responses;
3463 }
3464 
3465 static inline unsigned int pqi_num_elements_free(unsigned int pi,
3466 	unsigned int ci, unsigned int elements_in_queue)
3467 {
3468 	unsigned int num_elements_used;
3469 
3470 	if (pi >= ci)
3471 		num_elements_used = pi - ci;
3472 	else
3473 		num_elements_used = elements_in_queue - ci + pi;
3474 
3475 	return elements_in_queue - num_elements_used - 1;
3476 }
3477 
3478 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3479 	struct pqi_event_acknowledge_request *iu, size_t iu_length)
3480 {
3481 	pqi_index_t iq_pi;
3482 	pqi_index_t iq_ci;
3483 	unsigned long flags;
3484 	void *next_element;
3485 	struct pqi_queue_group *queue_group;
3486 
3487 	queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3488 	put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3489 
3490 	while (1) {
3491 		spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3492 
3493 		iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3494 		iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3495 
3496 		if (pqi_num_elements_free(iq_pi, iq_ci,
3497 			ctrl_info->num_elements_per_iq))
3498 			break;
3499 
3500 		spin_unlock_irqrestore(
3501 			&queue_group->submit_lock[RAID_PATH], flags);
3502 
3503 		if (pqi_ctrl_offline(ctrl_info))
3504 			return;
3505 	}
3506 
3507 	next_element = queue_group->iq_element_array[RAID_PATH] +
3508 		(iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3509 
3510 	memcpy(next_element, iu, iu_length);
3511 
3512 	iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3513 	queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3514 
3515 	/*
3516 	 * This write notifies the controller that an IU is available to be
3517 	 * processed.
3518 	 */
3519 	writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3520 
3521 	spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3522 }
3523 
3524 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3525 	struct pqi_event *event)
3526 {
3527 	struct pqi_event_acknowledge_request request;
3528 
3529 	memset(&request, 0, sizeof(request));
3530 
3531 	request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3532 	put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3533 		&request.header.iu_length);
3534 	request.event_type = event->event_type;
3535 	put_unaligned_le16(event->event_id, &request.event_id);
3536 	put_unaligned_le32(event->additional_event_id, &request.additional_event_id);
3537 
3538 	pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3539 }
3540 
3541 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS		30
3542 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS	1
3543 
3544 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3545 	struct pqi_ctrl_info *ctrl_info)
3546 {
3547 	u8 status;
3548 	unsigned long timeout;
3549 
3550 	timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * HZ) + jiffies;
3551 
3552 	while (1) {
3553 		status = pqi_read_soft_reset_status(ctrl_info);
3554 		if (status & PQI_SOFT_RESET_INITIATE)
3555 			return RESET_INITIATE_DRIVER;
3556 
3557 		if (status & PQI_SOFT_RESET_ABORT)
3558 			return RESET_ABORT;
3559 
3560 		if (!sis_is_firmware_running(ctrl_info))
3561 			return RESET_NORESPONSE;
3562 
3563 		if (time_after(jiffies, timeout)) {
3564 			dev_warn(&ctrl_info->pci_dev->dev,
3565 				"timed out waiting for soft reset status\n");
3566 			return RESET_TIMEDOUT;
3567 		}
3568 
3569 		ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3570 	}
3571 }
3572 
3573 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info)
3574 {
3575 	int rc;
3576 	unsigned int delay_secs;
3577 	enum pqi_soft_reset_status reset_status;
3578 
3579 	if (ctrl_info->soft_reset_handshake_supported)
3580 		reset_status = pqi_poll_for_soft_reset_status(ctrl_info);
3581 	else
3582 		reset_status = RESET_INITIATE_FIRMWARE;
3583 
3584 	delay_secs = PQI_POST_RESET_DELAY_SECS;
3585 
3586 	switch (reset_status) {
3587 	case RESET_TIMEDOUT:
3588 		delay_secs = PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS;
3589 		fallthrough;
3590 	case RESET_INITIATE_DRIVER:
3591 		dev_info(&ctrl_info->pci_dev->dev,
3592 				"Online Firmware Activation: resetting controller\n");
3593 		sis_soft_reset(ctrl_info);
3594 		fallthrough;
3595 	case RESET_INITIATE_FIRMWARE:
3596 		ctrl_info->pqi_mode_enabled = false;
3597 		pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
3598 		rc = pqi_ofa_ctrl_restart(ctrl_info, delay_secs);
3599 		pqi_ofa_free_host_buffer(ctrl_info);
3600 		pqi_ctrl_ofa_done(ctrl_info);
3601 		dev_info(&ctrl_info->pci_dev->dev,
3602 				"Online Firmware Activation: %s\n",
3603 				rc == 0 ? "SUCCESS" : "FAILED");
3604 		break;
3605 	case RESET_ABORT:
3606 		dev_info(&ctrl_info->pci_dev->dev,
3607 				"Online Firmware Activation ABORTED\n");
3608 		if (ctrl_info->soft_reset_handshake_supported)
3609 			pqi_clear_soft_reset_status(ctrl_info);
3610 		pqi_ofa_free_host_buffer(ctrl_info);
3611 		pqi_ctrl_ofa_done(ctrl_info);
3612 		pqi_ofa_ctrl_unquiesce(ctrl_info);
3613 		break;
3614 	case RESET_NORESPONSE:
3615 		fallthrough;
3616 	default:
3617 		dev_err(&ctrl_info->pci_dev->dev,
3618 			"unexpected Online Firmware Activation reset status: 0x%x\n",
3619 			reset_status);
3620 		pqi_ofa_free_host_buffer(ctrl_info);
3621 		pqi_ctrl_ofa_done(ctrl_info);
3622 		pqi_ofa_ctrl_unquiesce(ctrl_info);
3623 		pqi_take_ctrl_offline(ctrl_info, PQI_OFA_RESPONSE_TIMEOUT);
3624 		break;
3625 	}
3626 }
3627 
3628 static void pqi_ofa_memory_alloc_worker(struct work_struct *work)
3629 {
3630 	struct pqi_ctrl_info *ctrl_info;
3631 
3632 	ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_memory_alloc_work);
3633 
3634 	pqi_ctrl_ofa_start(ctrl_info);
3635 	pqi_ofa_setup_host_buffer(ctrl_info);
3636 	pqi_ofa_host_memory_update(ctrl_info);
3637 }
3638 
3639 static void pqi_ofa_quiesce_worker(struct work_struct *work)
3640 {
3641 	struct pqi_ctrl_info *ctrl_info;
3642 	struct pqi_event *event;
3643 
3644 	ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_quiesce_work);
3645 
3646 	event = &ctrl_info->events[pqi_event_type_to_event_index(PQI_EVENT_TYPE_OFA)];
3647 
3648 	pqi_ofa_ctrl_quiesce(ctrl_info);
3649 	pqi_acknowledge_event(ctrl_info, event);
3650 	pqi_process_soft_reset(ctrl_info);
3651 }
3652 
3653 static bool pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3654 	struct pqi_event *event)
3655 {
3656 	bool ack_event;
3657 
3658 	ack_event = true;
3659 
3660 	switch (event->event_id) {
3661 	case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3662 		dev_info(&ctrl_info->pci_dev->dev,
3663 			"received Online Firmware Activation memory allocation request\n");
3664 		schedule_work(&ctrl_info->ofa_memory_alloc_work);
3665 		break;
3666 	case PQI_EVENT_OFA_QUIESCE:
3667 		dev_info(&ctrl_info->pci_dev->dev,
3668 			"received Online Firmware Activation quiesce request\n");
3669 		schedule_work(&ctrl_info->ofa_quiesce_work);
3670 		ack_event = false;
3671 		break;
3672 	case PQI_EVENT_OFA_CANCELED:
3673 		dev_info(&ctrl_info->pci_dev->dev,
3674 			"received Online Firmware Activation cancel request: reason: %u\n",
3675 			ctrl_info->ofa_cancel_reason);
3676 		pqi_ofa_free_host_buffer(ctrl_info);
3677 		pqi_ctrl_ofa_done(ctrl_info);
3678 		break;
3679 	default:
3680 		dev_err(&ctrl_info->pci_dev->dev,
3681 			"received unknown Online Firmware Activation request: event ID: %u\n",
3682 			event->event_id);
3683 		break;
3684 	}
3685 
3686 	return ack_event;
3687 }
3688 
3689 static void pqi_disable_raid_bypass(struct pqi_ctrl_info *ctrl_info)
3690 {
3691 	unsigned long flags;
3692 	struct pqi_scsi_dev *device;
3693 
3694 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
3695 
3696 	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
3697 		if (device->raid_bypass_enabled)
3698 			device->raid_bypass_enabled = false;
3699 
3700 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
3701 }
3702 
3703 static void pqi_event_worker(struct work_struct *work)
3704 {
3705 	unsigned int i;
3706 	bool rescan_needed;
3707 	struct pqi_ctrl_info *ctrl_info;
3708 	struct pqi_event *event;
3709 	bool ack_event;
3710 
3711 	ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3712 
3713 	pqi_ctrl_busy(ctrl_info);
3714 	pqi_wait_if_ctrl_blocked(ctrl_info);
3715 	if (pqi_ctrl_offline(ctrl_info))
3716 		goto out;
3717 
3718 	rescan_needed = false;
3719 	event = ctrl_info->events;
3720 	for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3721 		if (event->pending) {
3722 			event->pending = false;
3723 			if (event->event_type == PQI_EVENT_TYPE_OFA) {
3724 				ack_event = pqi_ofa_process_event(ctrl_info, event);
3725 			} else {
3726 				ack_event = true;
3727 				rescan_needed = true;
3728 				if (event->event_type == PQI_EVENT_TYPE_LOGICAL_DEVICE)
3729 					ctrl_info->logical_volume_rescan_needed = true;
3730 				else if (event->event_type == PQI_EVENT_TYPE_AIO_STATE_CHANGE)
3731 					pqi_disable_raid_bypass(ctrl_info);
3732 			}
3733 			if (ack_event)
3734 				pqi_acknowledge_event(ctrl_info, event);
3735 		}
3736 		event++;
3737 	}
3738 
3739 #define PQI_RESCAN_WORK_FOR_EVENT_DELAY		(5 * HZ)
3740 
3741 	if (rescan_needed)
3742 		pqi_schedule_rescan_worker_with_delay(ctrl_info,
3743 			PQI_RESCAN_WORK_FOR_EVENT_DELAY);
3744 
3745 out:
3746 	pqi_ctrl_unbusy(ctrl_info);
3747 }
3748 
3749 #define PQI_HEARTBEAT_TIMER_INTERVAL	(10 * HZ)
3750 
3751 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3752 {
3753 	int num_interrupts;
3754 	u32 heartbeat_count;
3755 	struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t, heartbeat_timer);
3756 
3757 	pqi_check_ctrl_health(ctrl_info);
3758 	if (pqi_ctrl_offline(ctrl_info))
3759 		return;
3760 
3761 	num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3762 	heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3763 
3764 	if (num_interrupts == ctrl_info->previous_num_interrupts) {
3765 		if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3766 			dev_err(&ctrl_info->pci_dev->dev,
3767 				"no heartbeat detected - last heartbeat count: %u\n",
3768 				heartbeat_count);
3769 			pqi_take_ctrl_offline(ctrl_info, PQI_NO_HEARTBEAT);
3770 			return;
3771 		}
3772 	} else {
3773 		ctrl_info->previous_num_interrupts = num_interrupts;
3774 	}
3775 
3776 	ctrl_info->previous_heartbeat_count = heartbeat_count;
3777 	mod_timer(&ctrl_info->heartbeat_timer,
3778 		jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3779 }
3780 
3781 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3782 {
3783 	if (!ctrl_info->heartbeat_counter)
3784 		return;
3785 
3786 	ctrl_info->previous_num_interrupts =
3787 		atomic_read(&ctrl_info->num_interrupts);
3788 	ctrl_info->previous_heartbeat_count =
3789 		pqi_read_heartbeat_counter(ctrl_info);
3790 
3791 	ctrl_info->heartbeat_timer.expires =
3792 		jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3793 	add_timer(&ctrl_info->heartbeat_timer);
3794 }
3795 
3796 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3797 {
3798 	del_timer_sync(&ctrl_info->heartbeat_timer);
3799 }
3800 
3801 static void pqi_ofa_capture_event_payload(struct pqi_ctrl_info *ctrl_info,
3802 	struct pqi_event *event, struct pqi_event_response *response)
3803 {
3804 	switch (event->event_id) {
3805 	case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3806 		ctrl_info->ofa_bytes_requested =
3807 			get_unaligned_le32(&response->data.ofa_memory_allocation.bytes_requested);
3808 		break;
3809 	case PQI_EVENT_OFA_CANCELED:
3810 		ctrl_info->ofa_cancel_reason =
3811 			get_unaligned_le16(&response->data.ofa_cancelled.reason);
3812 		break;
3813 	}
3814 }
3815 
3816 static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3817 {
3818 	int num_events;
3819 	pqi_index_t oq_pi;
3820 	pqi_index_t oq_ci;
3821 	struct pqi_event_queue *event_queue;
3822 	struct pqi_event_response *response;
3823 	struct pqi_event *event;
3824 	int event_index;
3825 
3826 	event_queue = &ctrl_info->event_queue;
3827 	num_events = 0;
3828 	oq_ci = event_queue->oq_ci_copy;
3829 
3830 	while (1) {
3831 		oq_pi = readl(event_queue->oq_pi);
3832 		if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) {
3833 			pqi_invalid_response(ctrl_info, PQI_EVENT_PI_OUT_OF_RANGE);
3834 			dev_err(&ctrl_info->pci_dev->dev,
3835 				"event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3836 				oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci);
3837 			return -1;
3838 		}
3839 
3840 		if (oq_pi == oq_ci)
3841 			break;
3842 
3843 		num_events++;
3844 		response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3845 
3846 		event_index = pqi_event_type_to_event_index(response->event_type);
3847 
3848 		if (event_index >= 0 && response->request_acknowledge) {
3849 			event = &ctrl_info->events[event_index];
3850 			event->pending = true;
3851 			event->event_type = response->event_type;
3852 			event->event_id = get_unaligned_le16(&response->event_id);
3853 			event->additional_event_id =
3854 				get_unaligned_le32(&response->additional_event_id);
3855 			if (event->event_type == PQI_EVENT_TYPE_OFA)
3856 				pqi_ofa_capture_event_payload(ctrl_info, event, response);
3857 		}
3858 
3859 		oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3860 	}
3861 
3862 	if (num_events) {
3863 		event_queue->oq_ci_copy = oq_ci;
3864 		writel(oq_ci, event_queue->oq_ci);
3865 		schedule_work(&ctrl_info->event_work);
3866 	}
3867 
3868 	return num_events;
3869 }
3870 
3871 #define PQI_LEGACY_INTX_MASK	0x1
3872 
3873 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info, bool enable_intx)
3874 {
3875 	u32 intx_mask;
3876 	struct pqi_device_registers __iomem *pqi_registers;
3877 	volatile void __iomem *register_addr;
3878 
3879 	pqi_registers = ctrl_info->pqi_registers;
3880 
3881 	if (enable_intx)
3882 		register_addr = &pqi_registers->legacy_intx_mask_clear;
3883 	else
3884 		register_addr = &pqi_registers->legacy_intx_mask_set;
3885 
3886 	intx_mask = readl(register_addr);
3887 	intx_mask |= PQI_LEGACY_INTX_MASK;
3888 	writel(intx_mask, register_addr);
3889 }
3890 
3891 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3892 	enum pqi_irq_mode new_mode)
3893 {
3894 	switch (ctrl_info->irq_mode) {
3895 	case IRQ_MODE_MSIX:
3896 		switch (new_mode) {
3897 		case IRQ_MODE_MSIX:
3898 			break;
3899 		case IRQ_MODE_INTX:
3900 			pqi_configure_legacy_intx(ctrl_info, true);
3901 			sis_enable_intx(ctrl_info);
3902 			break;
3903 		case IRQ_MODE_NONE:
3904 			break;
3905 		}
3906 		break;
3907 	case IRQ_MODE_INTX:
3908 		switch (new_mode) {
3909 		case IRQ_MODE_MSIX:
3910 			pqi_configure_legacy_intx(ctrl_info, false);
3911 			sis_enable_msix(ctrl_info);
3912 			break;
3913 		case IRQ_MODE_INTX:
3914 			break;
3915 		case IRQ_MODE_NONE:
3916 			pqi_configure_legacy_intx(ctrl_info, false);
3917 			break;
3918 		}
3919 		break;
3920 	case IRQ_MODE_NONE:
3921 		switch (new_mode) {
3922 		case IRQ_MODE_MSIX:
3923 			sis_enable_msix(ctrl_info);
3924 			break;
3925 		case IRQ_MODE_INTX:
3926 			pqi_configure_legacy_intx(ctrl_info, true);
3927 			sis_enable_intx(ctrl_info);
3928 			break;
3929 		case IRQ_MODE_NONE:
3930 			break;
3931 		}
3932 		break;
3933 	}
3934 
3935 	ctrl_info->irq_mode = new_mode;
3936 }
3937 
3938 #define PQI_LEGACY_INTX_PENDING		0x1
3939 
3940 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3941 {
3942 	bool valid_irq;
3943 	u32 intx_status;
3944 
3945 	switch (ctrl_info->irq_mode) {
3946 	case IRQ_MODE_MSIX:
3947 		valid_irq = true;
3948 		break;
3949 	case IRQ_MODE_INTX:
3950 		intx_status = readl(&ctrl_info->pqi_registers->legacy_intx_status);
3951 		if (intx_status & PQI_LEGACY_INTX_PENDING)
3952 			valid_irq = true;
3953 		else
3954 			valid_irq = false;
3955 		break;
3956 	case IRQ_MODE_NONE:
3957 	default:
3958 		valid_irq = false;
3959 		break;
3960 	}
3961 
3962 	return valid_irq;
3963 }
3964 
3965 static irqreturn_t pqi_irq_handler(int irq, void *data)
3966 {
3967 	struct pqi_ctrl_info *ctrl_info;
3968 	struct pqi_queue_group *queue_group;
3969 	int num_io_responses_handled;
3970 	int num_events_handled;
3971 
3972 	queue_group = data;
3973 	ctrl_info = queue_group->ctrl_info;
3974 
3975 	if (!pqi_is_valid_irq(ctrl_info))
3976 		return IRQ_NONE;
3977 
3978 	num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3979 	if (num_io_responses_handled < 0)
3980 		goto out;
3981 
3982 	if (irq == ctrl_info->event_irq) {
3983 		num_events_handled = pqi_process_event_intr(ctrl_info);
3984 		if (num_events_handled < 0)
3985 			goto out;
3986 	} else {
3987 		num_events_handled = 0;
3988 	}
3989 
3990 	if (num_io_responses_handled + num_events_handled > 0)
3991 		atomic_inc(&ctrl_info->num_interrupts);
3992 
3993 	pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3994 	pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3995 
3996 out:
3997 	return IRQ_HANDLED;
3998 }
3999 
4000 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
4001 {
4002 	struct pci_dev *pci_dev = ctrl_info->pci_dev;
4003 	int i;
4004 	int rc;
4005 
4006 	ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
4007 
4008 	for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
4009 		rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
4010 			DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
4011 		if (rc) {
4012 			dev_err(&pci_dev->dev,
4013 				"irq %u init failed with error %d\n",
4014 				pci_irq_vector(pci_dev, i), rc);
4015 			return rc;
4016 		}
4017 		ctrl_info->num_msix_vectors_initialized++;
4018 	}
4019 
4020 	return 0;
4021 }
4022 
4023 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
4024 {
4025 	int i;
4026 
4027 	for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
4028 		free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
4029 			&ctrl_info->queue_groups[i]);
4030 
4031 	ctrl_info->num_msix_vectors_initialized = 0;
4032 }
4033 
4034 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4035 {
4036 	int num_vectors_enabled;
4037 	unsigned int flags = PCI_IRQ_MSIX;
4038 
4039 	if (!pqi_disable_managed_interrupts)
4040 		flags |= PCI_IRQ_AFFINITY;
4041 
4042 	num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
4043 			PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
4044 			flags);
4045 	if (num_vectors_enabled < 0) {
4046 		dev_err(&ctrl_info->pci_dev->dev,
4047 			"MSI-X init failed with error %d\n",
4048 			num_vectors_enabled);
4049 		return num_vectors_enabled;
4050 	}
4051 
4052 	ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
4053 	ctrl_info->irq_mode = IRQ_MODE_MSIX;
4054 	return 0;
4055 }
4056 
4057 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4058 {
4059 	if (ctrl_info->num_msix_vectors_enabled) {
4060 		pci_free_irq_vectors(ctrl_info->pci_dev);
4061 		ctrl_info->num_msix_vectors_enabled = 0;
4062 	}
4063 }
4064 
4065 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
4066 {
4067 	unsigned int i;
4068 	size_t alloc_length;
4069 	size_t element_array_length_per_iq;
4070 	size_t element_array_length_per_oq;
4071 	void *element_array;
4072 	void __iomem *next_queue_index;
4073 	void *aligned_pointer;
4074 	unsigned int num_inbound_queues;
4075 	unsigned int num_outbound_queues;
4076 	unsigned int num_queue_indexes;
4077 	struct pqi_queue_group *queue_group;
4078 
4079 	element_array_length_per_iq =
4080 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
4081 		ctrl_info->num_elements_per_iq;
4082 	element_array_length_per_oq =
4083 		PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
4084 		ctrl_info->num_elements_per_oq;
4085 	num_inbound_queues = ctrl_info->num_queue_groups * 2;
4086 	num_outbound_queues = ctrl_info->num_queue_groups;
4087 	num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
4088 
4089 	aligned_pointer = NULL;
4090 
4091 	for (i = 0; i < num_inbound_queues; i++) {
4092 		aligned_pointer = PTR_ALIGN(aligned_pointer,
4093 			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4094 		aligned_pointer += element_array_length_per_iq;
4095 	}
4096 
4097 	for (i = 0; i < num_outbound_queues; i++) {
4098 		aligned_pointer = PTR_ALIGN(aligned_pointer,
4099 			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4100 		aligned_pointer += element_array_length_per_oq;
4101 	}
4102 
4103 	aligned_pointer = PTR_ALIGN(aligned_pointer,
4104 		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4105 	aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4106 		PQI_EVENT_OQ_ELEMENT_LENGTH;
4107 
4108 	for (i = 0; i < num_queue_indexes; i++) {
4109 		aligned_pointer = PTR_ALIGN(aligned_pointer,
4110 			PQI_OPERATIONAL_INDEX_ALIGNMENT);
4111 		aligned_pointer += sizeof(pqi_index_t);
4112 	}
4113 
4114 	alloc_length = (size_t)aligned_pointer +
4115 		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4116 
4117 	alloc_length += PQI_EXTRA_SGL_MEMORY;
4118 
4119 	ctrl_info->queue_memory_base =
4120 		dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4121 				   &ctrl_info->queue_memory_base_dma_handle,
4122 				   GFP_KERNEL);
4123 
4124 	if (!ctrl_info->queue_memory_base)
4125 		return -ENOMEM;
4126 
4127 	ctrl_info->queue_memory_length = alloc_length;
4128 
4129 	element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
4130 		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4131 
4132 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4133 		queue_group = &ctrl_info->queue_groups[i];
4134 		queue_group->iq_element_array[RAID_PATH] = element_array;
4135 		queue_group->iq_element_array_bus_addr[RAID_PATH] =
4136 			ctrl_info->queue_memory_base_dma_handle +
4137 				(element_array - ctrl_info->queue_memory_base);
4138 		element_array += element_array_length_per_iq;
4139 		element_array = PTR_ALIGN(element_array,
4140 			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4141 		queue_group->iq_element_array[AIO_PATH] = element_array;
4142 		queue_group->iq_element_array_bus_addr[AIO_PATH] =
4143 			ctrl_info->queue_memory_base_dma_handle +
4144 			(element_array - ctrl_info->queue_memory_base);
4145 		element_array += element_array_length_per_iq;
4146 		element_array = PTR_ALIGN(element_array,
4147 			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4148 	}
4149 
4150 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4151 		queue_group = &ctrl_info->queue_groups[i];
4152 		queue_group->oq_element_array = element_array;
4153 		queue_group->oq_element_array_bus_addr =
4154 			ctrl_info->queue_memory_base_dma_handle +
4155 			(element_array - ctrl_info->queue_memory_base);
4156 		element_array += element_array_length_per_oq;
4157 		element_array = PTR_ALIGN(element_array,
4158 			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4159 	}
4160 
4161 	ctrl_info->event_queue.oq_element_array = element_array;
4162 	ctrl_info->event_queue.oq_element_array_bus_addr =
4163 		ctrl_info->queue_memory_base_dma_handle +
4164 		(element_array - ctrl_info->queue_memory_base);
4165 	element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4166 		PQI_EVENT_OQ_ELEMENT_LENGTH;
4167 
4168 	next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
4169 		PQI_OPERATIONAL_INDEX_ALIGNMENT);
4170 
4171 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4172 		queue_group = &ctrl_info->queue_groups[i];
4173 		queue_group->iq_ci[RAID_PATH] = next_queue_index;
4174 		queue_group->iq_ci_bus_addr[RAID_PATH] =
4175 			ctrl_info->queue_memory_base_dma_handle +
4176 			(next_queue_index -
4177 			(void __iomem *)ctrl_info->queue_memory_base);
4178 		next_queue_index += sizeof(pqi_index_t);
4179 		next_queue_index = PTR_ALIGN(next_queue_index,
4180 			PQI_OPERATIONAL_INDEX_ALIGNMENT);
4181 		queue_group->iq_ci[AIO_PATH] = next_queue_index;
4182 		queue_group->iq_ci_bus_addr[AIO_PATH] =
4183 			ctrl_info->queue_memory_base_dma_handle +
4184 			(next_queue_index -
4185 			(void __iomem *)ctrl_info->queue_memory_base);
4186 		next_queue_index += sizeof(pqi_index_t);
4187 		next_queue_index = PTR_ALIGN(next_queue_index,
4188 			PQI_OPERATIONAL_INDEX_ALIGNMENT);
4189 		queue_group->oq_pi = next_queue_index;
4190 		queue_group->oq_pi_bus_addr =
4191 			ctrl_info->queue_memory_base_dma_handle +
4192 			(next_queue_index -
4193 			(void __iomem *)ctrl_info->queue_memory_base);
4194 		next_queue_index += sizeof(pqi_index_t);
4195 		next_queue_index = PTR_ALIGN(next_queue_index,
4196 			PQI_OPERATIONAL_INDEX_ALIGNMENT);
4197 	}
4198 
4199 	ctrl_info->event_queue.oq_pi = next_queue_index;
4200 	ctrl_info->event_queue.oq_pi_bus_addr =
4201 		ctrl_info->queue_memory_base_dma_handle +
4202 		(next_queue_index -
4203 		(void __iomem *)ctrl_info->queue_memory_base);
4204 
4205 	return 0;
4206 }
4207 
4208 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
4209 {
4210 	unsigned int i;
4211 	u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4212 	u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4213 
4214 	/*
4215 	 * Initialize the backpointers to the controller structure in
4216 	 * each operational queue group structure.
4217 	 */
4218 	for (i = 0; i < ctrl_info->num_queue_groups; i++)
4219 		ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
4220 
4221 	/*
4222 	 * Assign IDs to all operational queues.  Note that the IDs
4223 	 * assigned to operational IQs are independent of the IDs
4224 	 * assigned to operational OQs.
4225 	 */
4226 	ctrl_info->event_queue.oq_id = next_oq_id++;
4227 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4228 		ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
4229 		ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
4230 		ctrl_info->queue_groups[i].oq_id = next_oq_id++;
4231 	}
4232 
4233 	/*
4234 	 * Assign MSI-X table entry indexes to all queues.  Note that the
4235 	 * interrupt for the event queue is shared with the first queue group.
4236 	 */
4237 	ctrl_info->event_queue.int_msg_num = 0;
4238 	for (i = 0; i < ctrl_info->num_queue_groups; i++)
4239 		ctrl_info->queue_groups[i].int_msg_num = i;
4240 
4241 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4242 		spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
4243 		spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
4244 		INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
4245 		INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
4246 	}
4247 }
4248 
4249 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
4250 {
4251 	size_t alloc_length;
4252 	struct pqi_admin_queues_aligned *admin_queues_aligned;
4253 	struct pqi_admin_queues *admin_queues;
4254 
4255 	alloc_length = sizeof(struct pqi_admin_queues_aligned) +
4256 		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4257 
4258 	ctrl_info->admin_queue_memory_base =
4259 		dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4260 				   &ctrl_info->admin_queue_memory_base_dma_handle,
4261 				   GFP_KERNEL);
4262 
4263 	if (!ctrl_info->admin_queue_memory_base)
4264 		return -ENOMEM;
4265 
4266 	ctrl_info->admin_queue_memory_length = alloc_length;
4267 
4268 	admin_queues = &ctrl_info->admin_queues;
4269 	admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
4270 		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4271 	admin_queues->iq_element_array =
4272 		&admin_queues_aligned->iq_element_array;
4273 	admin_queues->oq_element_array =
4274 		&admin_queues_aligned->oq_element_array;
4275 	admin_queues->iq_ci =
4276 		(pqi_index_t __iomem *)&admin_queues_aligned->iq_ci;
4277 	admin_queues->oq_pi =
4278 		(pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
4279 
4280 	admin_queues->iq_element_array_bus_addr =
4281 		ctrl_info->admin_queue_memory_base_dma_handle +
4282 		(admin_queues->iq_element_array -
4283 		ctrl_info->admin_queue_memory_base);
4284 	admin_queues->oq_element_array_bus_addr =
4285 		ctrl_info->admin_queue_memory_base_dma_handle +
4286 		(admin_queues->oq_element_array -
4287 		ctrl_info->admin_queue_memory_base);
4288 	admin_queues->iq_ci_bus_addr =
4289 		ctrl_info->admin_queue_memory_base_dma_handle +
4290 		((void __iomem *)admin_queues->iq_ci -
4291 		(void __iomem *)ctrl_info->admin_queue_memory_base);
4292 	admin_queues->oq_pi_bus_addr =
4293 		ctrl_info->admin_queue_memory_base_dma_handle +
4294 		((void __iomem *)admin_queues->oq_pi -
4295 		(void __iomem *)ctrl_info->admin_queue_memory_base);
4296 
4297 	return 0;
4298 }
4299 
4300 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES		HZ
4301 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS	1
4302 
4303 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
4304 {
4305 	struct pqi_device_registers __iomem *pqi_registers;
4306 	struct pqi_admin_queues *admin_queues;
4307 	unsigned long timeout;
4308 	u8 status;
4309 	u32 reg;
4310 
4311 	pqi_registers = ctrl_info->pqi_registers;
4312 	admin_queues = &ctrl_info->admin_queues;
4313 
4314 	writeq((u64)admin_queues->iq_element_array_bus_addr,
4315 		&pqi_registers->admin_iq_element_array_addr);
4316 	writeq((u64)admin_queues->oq_element_array_bus_addr,
4317 		&pqi_registers->admin_oq_element_array_addr);
4318 	writeq((u64)admin_queues->iq_ci_bus_addr,
4319 		&pqi_registers->admin_iq_ci_addr);
4320 	writeq((u64)admin_queues->oq_pi_bus_addr,
4321 		&pqi_registers->admin_oq_pi_addr);
4322 
4323 	reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
4324 		(PQI_ADMIN_OQ_NUM_ELEMENTS << 8) |
4325 		(admin_queues->int_msg_num << 16);
4326 	writel(reg, &pqi_registers->admin_iq_num_elements);
4327 
4328 	writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
4329 		&pqi_registers->function_and_status_code);
4330 
4331 	timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
4332 	while (1) {
4333 		msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
4334 		status = readb(&pqi_registers->function_and_status_code);
4335 		if (status == PQI_STATUS_IDLE)
4336 			break;
4337 		if (time_after(jiffies, timeout))
4338 			return -ETIMEDOUT;
4339 	}
4340 
4341 	/*
4342 	 * The offset registers are not initialized to the correct
4343 	 * offsets until *after* the create admin queue pair command
4344 	 * completes successfully.
4345 	 */
4346 	admin_queues->iq_pi = ctrl_info->iomem_base +
4347 		PQI_DEVICE_REGISTERS_OFFSET +
4348 		readq(&pqi_registers->admin_iq_pi_offset);
4349 	admin_queues->oq_ci = ctrl_info->iomem_base +
4350 		PQI_DEVICE_REGISTERS_OFFSET +
4351 		readq(&pqi_registers->admin_oq_ci_offset);
4352 
4353 	return 0;
4354 }
4355 
4356 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
4357 	struct pqi_general_admin_request *request)
4358 {
4359 	struct pqi_admin_queues *admin_queues;
4360 	void *next_element;
4361 	pqi_index_t iq_pi;
4362 
4363 	admin_queues = &ctrl_info->admin_queues;
4364 	iq_pi = admin_queues->iq_pi_copy;
4365 
4366 	next_element = admin_queues->iq_element_array +
4367 		(iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
4368 
4369 	memcpy(next_element, request, sizeof(*request));
4370 
4371 	iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
4372 	admin_queues->iq_pi_copy = iq_pi;
4373 
4374 	/*
4375 	 * This write notifies the controller that an IU is available to be
4376 	 * processed.
4377 	 */
4378 	writel(iq_pi, admin_queues->iq_pi);
4379 }
4380 
4381 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS	60
4382 
4383 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
4384 	struct pqi_general_admin_response *response)
4385 {
4386 	struct pqi_admin_queues *admin_queues;
4387 	pqi_index_t oq_pi;
4388 	pqi_index_t oq_ci;
4389 	unsigned long timeout;
4390 
4391 	admin_queues = &ctrl_info->admin_queues;
4392 	oq_ci = admin_queues->oq_ci_copy;
4393 
4394 	timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
4395 
4396 	while (1) {
4397 		oq_pi = readl(admin_queues->oq_pi);
4398 		if (oq_pi != oq_ci)
4399 			break;
4400 		if (time_after(jiffies, timeout)) {
4401 			dev_err(&ctrl_info->pci_dev->dev,
4402 				"timed out waiting for admin response\n");
4403 			return -ETIMEDOUT;
4404 		}
4405 		if (!sis_is_firmware_running(ctrl_info))
4406 			return -ENXIO;
4407 		usleep_range(1000, 2000);
4408 	}
4409 
4410 	memcpy(response, admin_queues->oq_element_array +
4411 		(oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
4412 
4413 	oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
4414 	admin_queues->oq_ci_copy = oq_ci;
4415 	writel(oq_ci, admin_queues->oq_ci);
4416 
4417 	return 0;
4418 }
4419 
4420 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
4421 	struct pqi_queue_group *queue_group, enum pqi_io_path path,
4422 	struct pqi_io_request *io_request)
4423 {
4424 	struct pqi_io_request *next;
4425 	void *next_element;
4426 	pqi_index_t iq_pi;
4427 	pqi_index_t iq_ci;
4428 	size_t iu_length;
4429 	unsigned long flags;
4430 	unsigned int num_elements_needed;
4431 	unsigned int num_elements_to_end_of_queue;
4432 	size_t copy_count;
4433 	struct pqi_iu_header *request;
4434 
4435 	spin_lock_irqsave(&queue_group->submit_lock[path], flags);
4436 
4437 	if (io_request) {
4438 		io_request->queue_group = queue_group;
4439 		list_add_tail(&io_request->request_list_entry,
4440 			&queue_group->request_list[path]);
4441 	}
4442 
4443 	iq_pi = queue_group->iq_pi_copy[path];
4444 
4445 	list_for_each_entry_safe(io_request, next,
4446 		&queue_group->request_list[path], request_list_entry) {
4447 
4448 		request = io_request->iu;
4449 
4450 		iu_length = get_unaligned_le16(&request->iu_length) +
4451 			PQI_REQUEST_HEADER_LENGTH;
4452 		num_elements_needed =
4453 			DIV_ROUND_UP(iu_length,
4454 				PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4455 
4456 		iq_ci = readl(queue_group->iq_ci[path]);
4457 
4458 		if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
4459 			ctrl_info->num_elements_per_iq))
4460 			break;
4461 
4462 		put_unaligned_le16(queue_group->oq_id,
4463 			&request->response_queue_id);
4464 
4465 		next_element = queue_group->iq_element_array[path] +
4466 			(iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4467 
4468 		num_elements_to_end_of_queue =
4469 			ctrl_info->num_elements_per_iq - iq_pi;
4470 
4471 		if (num_elements_needed <= num_elements_to_end_of_queue) {
4472 			memcpy(next_element, request, iu_length);
4473 		} else {
4474 			copy_count = num_elements_to_end_of_queue *
4475 				PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4476 			memcpy(next_element, request, copy_count);
4477 			memcpy(queue_group->iq_element_array[path],
4478 				(u8 *)request + copy_count,
4479 				iu_length - copy_count);
4480 		}
4481 
4482 		iq_pi = (iq_pi + num_elements_needed) %
4483 			ctrl_info->num_elements_per_iq;
4484 
4485 		list_del(&io_request->request_list_entry);
4486 	}
4487 
4488 	if (iq_pi != queue_group->iq_pi_copy[path]) {
4489 		queue_group->iq_pi_copy[path] = iq_pi;
4490 		/*
4491 		 * This write notifies the controller that one or more IUs are
4492 		 * available to be processed.
4493 		 */
4494 		writel(iq_pi, queue_group->iq_pi[path]);
4495 	}
4496 
4497 	spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
4498 }
4499 
4500 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS		10
4501 
4502 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
4503 	struct completion *wait)
4504 {
4505 	int rc;
4506 
4507 	while (1) {
4508 		if (wait_for_completion_io_timeout(wait,
4509 			PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
4510 			rc = 0;
4511 			break;
4512 		}
4513 
4514 		pqi_check_ctrl_health(ctrl_info);
4515 		if (pqi_ctrl_offline(ctrl_info)) {
4516 			rc = -ENXIO;
4517 			break;
4518 		}
4519 	}
4520 
4521 	return rc;
4522 }
4523 
4524 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
4525 	void *context)
4526 {
4527 	struct completion *waiting = context;
4528 
4529 	complete(waiting);
4530 }
4531 
4532 static int pqi_process_raid_io_error_synchronous(
4533 	struct pqi_raid_error_info *error_info)
4534 {
4535 	int rc = -EIO;
4536 
4537 	switch (error_info->data_out_result) {
4538 	case PQI_DATA_IN_OUT_GOOD:
4539 		if (error_info->status == SAM_STAT_GOOD)
4540 			rc = 0;
4541 		break;
4542 	case PQI_DATA_IN_OUT_UNDERFLOW:
4543 		if (error_info->status == SAM_STAT_GOOD ||
4544 			error_info->status == SAM_STAT_CHECK_CONDITION)
4545 			rc = 0;
4546 		break;
4547 	case PQI_DATA_IN_OUT_ABORTED:
4548 		rc = PQI_CMD_STATUS_ABORTED;
4549 		break;
4550 	}
4551 
4552 	return rc;
4553 }
4554 
4555 static inline bool pqi_is_blockable_request(struct pqi_iu_header *request)
4556 {
4557 	return (request->driver_flags & PQI_DRIVER_NONBLOCKABLE_REQUEST) == 0;
4558 }
4559 
4560 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4561 	struct pqi_iu_header *request, unsigned int flags,
4562 	struct pqi_raid_error_info *error_info)
4563 {
4564 	int rc = 0;
4565 	struct pqi_io_request *io_request;
4566 	size_t iu_length;
4567 	DECLARE_COMPLETION_ONSTACK(wait);
4568 
4569 	if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4570 		if (down_interruptible(&ctrl_info->sync_request_sem))
4571 			return -ERESTARTSYS;
4572 	} else {
4573 		down(&ctrl_info->sync_request_sem);
4574 	}
4575 
4576 	pqi_ctrl_busy(ctrl_info);
4577 	/*
4578 	 * Wait for other admin queue updates such as;
4579 	 * config table changes, OFA memory updates, ...
4580 	 */
4581 	if (pqi_is_blockable_request(request))
4582 		pqi_wait_if_ctrl_blocked(ctrl_info);
4583 
4584 	if (pqi_ctrl_offline(ctrl_info)) {
4585 		rc = -ENXIO;
4586 		goto out;
4587 	}
4588 
4589 	io_request = pqi_alloc_io_request(ctrl_info);
4590 
4591 	put_unaligned_le16(io_request->index,
4592 		&(((struct pqi_raid_path_request *)request)->request_id));
4593 
4594 	if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4595 		((struct pqi_raid_path_request *)request)->error_index =
4596 			((struct pqi_raid_path_request *)request)->request_id;
4597 
4598 	iu_length = get_unaligned_le16(&request->iu_length) +
4599 		PQI_REQUEST_HEADER_LENGTH;
4600 	memcpy(io_request->iu, request, iu_length);
4601 
4602 	io_request->io_complete_callback = pqi_raid_synchronous_complete;
4603 	io_request->context = &wait;
4604 
4605 	pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4606 		io_request);
4607 
4608 	pqi_wait_for_completion_io(ctrl_info, &wait);
4609 
4610 	if (error_info) {
4611 		if (io_request->error_info)
4612 			memcpy(error_info, io_request->error_info, sizeof(*error_info));
4613 		else
4614 			memset(error_info, 0, sizeof(*error_info));
4615 	} else if (rc == 0 && io_request->error_info) {
4616 		rc = pqi_process_raid_io_error_synchronous(io_request->error_info);
4617 	}
4618 
4619 	pqi_free_io_request(io_request);
4620 
4621 out:
4622 	pqi_ctrl_unbusy(ctrl_info);
4623 	up(&ctrl_info->sync_request_sem);
4624 
4625 	return rc;
4626 }
4627 
4628 static int pqi_validate_admin_response(
4629 	struct pqi_general_admin_response *response, u8 expected_function_code)
4630 {
4631 	if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4632 		return -EINVAL;
4633 
4634 	if (get_unaligned_le16(&response->header.iu_length) !=
4635 		PQI_GENERAL_ADMIN_IU_LENGTH)
4636 		return -EINVAL;
4637 
4638 	if (response->function_code != expected_function_code)
4639 		return -EINVAL;
4640 
4641 	if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4642 		return -EINVAL;
4643 
4644 	return 0;
4645 }
4646 
4647 static int pqi_submit_admin_request_synchronous(
4648 	struct pqi_ctrl_info *ctrl_info,
4649 	struct pqi_general_admin_request *request,
4650 	struct pqi_general_admin_response *response)
4651 {
4652 	int rc;
4653 
4654 	pqi_submit_admin_request(ctrl_info, request);
4655 
4656 	rc = pqi_poll_for_admin_response(ctrl_info, response);
4657 
4658 	if (rc == 0)
4659 		rc = pqi_validate_admin_response(response, request->function_code);
4660 
4661 	return rc;
4662 }
4663 
4664 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4665 {
4666 	int rc;
4667 	struct pqi_general_admin_request request;
4668 	struct pqi_general_admin_response response;
4669 	struct pqi_device_capability *capability;
4670 	struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4671 
4672 	capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4673 	if (!capability)
4674 		return -ENOMEM;
4675 
4676 	memset(&request, 0, sizeof(request));
4677 
4678 	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4679 	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4680 		&request.header.iu_length);
4681 	request.function_code =
4682 		PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4683 	put_unaligned_le32(sizeof(*capability),
4684 		&request.data.report_device_capability.buffer_length);
4685 
4686 	rc = pqi_map_single(ctrl_info->pci_dev,
4687 		&request.data.report_device_capability.sg_descriptor,
4688 		capability, sizeof(*capability),
4689 		DMA_FROM_DEVICE);
4690 	if (rc)
4691 		goto out;
4692 
4693 	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, &response);
4694 
4695 	pqi_pci_unmap(ctrl_info->pci_dev,
4696 		&request.data.report_device_capability.sg_descriptor, 1,
4697 		DMA_FROM_DEVICE);
4698 
4699 	if (rc)
4700 		goto out;
4701 
4702 	if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4703 		rc = -EIO;
4704 		goto out;
4705 	}
4706 
4707 	ctrl_info->max_inbound_queues =
4708 		get_unaligned_le16(&capability->max_inbound_queues);
4709 	ctrl_info->max_elements_per_iq =
4710 		get_unaligned_le16(&capability->max_elements_per_iq);
4711 	ctrl_info->max_iq_element_length =
4712 		get_unaligned_le16(&capability->max_iq_element_length)
4713 		* 16;
4714 	ctrl_info->max_outbound_queues =
4715 		get_unaligned_le16(&capability->max_outbound_queues);
4716 	ctrl_info->max_elements_per_oq =
4717 		get_unaligned_le16(&capability->max_elements_per_oq);
4718 	ctrl_info->max_oq_element_length =
4719 		get_unaligned_le16(&capability->max_oq_element_length)
4720 		* 16;
4721 
4722 	sop_iu_layer_descriptor =
4723 		&capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4724 
4725 	ctrl_info->max_inbound_iu_length_per_firmware =
4726 		get_unaligned_le16(
4727 			&sop_iu_layer_descriptor->max_inbound_iu_length);
4728 	ctrl_info->inbound_spanning_supported =
4729 		sop_iu_layer_descriptor->inbound_spanning_supported;
4730 	ctrl_info->outbound_spanning_supported =
4731 		sop_iu_layer_descriptor->outbound_spanning_supported;
4732 
4733 out:
4734 	kfree(capability);
4735 
4736 	return rc;
4737 }
4738 
4739 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4740 {
4741 	if (ctrl_info->max_iq_element_length <
4742 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4743 		dev_err(&ctrl_info->pci_dev->dev,
4744 			"max. inbound queue element length of %d is less than the required length of %d\n",
4745 			ctrl_info->max_iq_element_length,
4746 			PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4747 		return -EINVAL;
4748 	}
4749 
4750 	if (ctrl_info->max_oq_element_length <
4751 		PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4752 		dev_err(&ctrl_info->pci_dev->dev,
4753 			"max. outbound queue element length of %d is less than the required length of %d\n",
4754 			ctrl_info->max_oq_element_length,
4755 			PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4756 		return -EINVAL;
4757 	}
4758 
4759 	if (ctrl_info->max_inbound_iu_length_per_firmware <
4760 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4761 		dev_err(&ctrl_info->pci_dev->dev,
4762 			"max. inbound IU length of %u is less than the min. required length of %d\n",
4763 			ctrl_info->max_inbound_iu_length_per_firmware,
4764 			PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4765 		return -EINVAL;
4766 	}
4767 
4768 	if (!ctrl_info->inbound_spanning_supported) {
4769 		dev_err(&ctrl_info->pci_dev->dev,
4770 			"the controller does not support inbound spanning\n");
4771 		return -EINVAL;
4772 	}
4773 
4774 	if (ctrl_info->outbound_spanning_supported) {
4775 		dev_err(&ctrl_info->pci_dev->dev,
4776 			"the controller supports outbound spanning but this driver does not\n");
4777 		return -EINVAL;
4778 	}
4779 
4780 	return 0;
4781 }
4782 
4783 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4784 {
4785 	int rc;
4786 	struct pqi_event_queue *event_queue;
4787 	struct pqi_general_admin_request request;
4788 	struct pqi_general_admin_response response;
4789 
4790 	event_queue = &ctrl_info->event_queue;
4791 
4792 	/*
4793 	 * Create OQ (Outbound Queue - device to host queue) to dedicate
4794 	 * to events.
4795 	 */
4796 	memset(&request, 0, sizeof(request));
4797 	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4798 	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4799 		&request.header.iu_length);
4800 	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4801 	put_unaligned_le16(event_queue->oq_id,
4802 		&request.data.create_operational_oq.queue_id);
4803 	put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4804 		&request.data.create_operational_oq.element_array_addr);
4805 	put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4806 		&request.data.create_operational_oq.pi_addr);
4807 	put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4808 		&request.data.create_operational_oq.num_elements);
4809 	put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4810 		&request.data.create_operational_oq.element_length);
4811 	request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4812 	put_unaligned_le16(event_queue->int_msg_num,
4813 		&request.data.create_operational_oq.int_msg_num);
4814 
4815 	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4816 		&response);
4817 	if (rc)
4818 		return rc;
4819 
4820 	event_queue->oq_ci = ctrl_info->iomem_base +
4821 		PQI_DEVICE_REGISTERS_OFFSET +
4822 		get_unaligned_le64(
4823 			&response.data.create_operational_oq.oq_ci_offset);
4824 
4825 	return 0;
4826 }
4827 
4828 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4829 	unsigned int group_number)
4830 {
4831 	int rc;
4832 	struct pqi_queue_group *queue_group;
4833 	struct pqi_general_admin_request request;
4834 	struct pqi_general_admin_response response;
4835 
4836 	queue_group = &ctrl_info->queue_groups[group_number];
4837 
4838 	/*
4839 	 * Create IQ (Inbound Queue - host to device queue) for
4840 	 * RAID path.
4841 	 */
4842 	memset(&request, 0, sizeof(request));
4843 	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4844 	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4845 		&request.header.iu_length);
4846 	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4847 	put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4848 		&request.data.create_operational_iq.queue_id);
4849 	put_unaligned_le64(
4850 		(u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4851 		&request.data.create_operational_iq.element_array_addr);
4852 	put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4853 		&request.data.create_operational_iq.ci_addr);
4854 	put_unaligned_le16(ctrl_info->num_elements_per_iq,
4855 		&request.data.create_operational_iq.num_elements);
4856 	put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4857 		&request.data.create_operational_iq.element_length);
4858 	request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4859 
4860 	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4861 		&response);
4862 	if (rc) {
4863 		dev_err(&ctrl_info->pci_dev->dev,
4864 			"error creating inbound RAID queue\n");
4865 		return rc;
4866 	}
4867 
4868 	queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4869 		PQI_DEVICE_REGISTERS_OFFSET +
4870 		get_unaligned_le64(
4871 			&response.data.create_operational_iq.iq_pi_offset);
4872 
4873 	/*
4874 	 * Create IQ (Inbound Queue - host to device queue) for
4875 	 * Advanced I/O (AIO) path.
4876 	 */
4877 	memset(&request, 0, sizeof(request));
4878 	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4879 	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4880 		&request.header.iu_length);
4881 	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4882 	put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4883 		&request.data.create_operational_iq.queue_id);
4884 	put_unaligned_le64((u64)queue_group->
4885 		iq_element_array_bus_addr[AIO_PATH],
4886 		&request.data.create_operational_iq.element_array_addr);
4887 	put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4888 		&request.data.create_operational_iq.ci_addr);
4889 	put_unaligned_le16(ctrl_info->num_elements_per_iq,
4890 		&request.data.create_operational_iq.num_elements);
4891 	put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4892 		&request.data.create_operational_iq.element_length);
4893 	request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4894 
4895 	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4896 		&response);
4897 	if (rc) {
4898 		dev_err(&ctrl_info->pci_dev->dev,
4899 			"error creating inbound AIO queue\n");
4900 		return rc;
4901 	}
4902 
4903 	queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4904 		PQI_DEVICE_REGISTERS_OFFSET +
4905 		get_unaligned_le64(
4906 			&response.data.create_operational_iq.iq_pi_offset);
4907 
4908 	/*
4909 	 * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4910 	 * assumed to be for RAID path I/O unless we change the queue's
4911 	 * property.
4912 	 */
4913 	memset(&request, 0, sizeof(request));
4914 	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4915 	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4916 		&request.header.iu_length);
4917 	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4918 	put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4919 		&request.data.change_operational_iq_properties.queue_id);
4920 	put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4921 		&request.data.change_operational_iq_properties.vendor_specific);
4922 
4923 	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4924 		&response);
4925 	if (rc) {
4926 		dev_err(&ctrl_info->pci_dev->dev,
4927 			"error changing queue property\n");
4928 		return rc;
4929 	}
4930 
4931 	/*
4932 	 * Create OQ (Outbound Queue - device to host queue).
4933 	 */
4934 	memset(&request, 0, sizeof(request));
4935 	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4936 	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4937 		&request.header.iu_length);
4938 	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4939 	put_unaligned_le16(queue_group->oq_id,
4940 		&request.data.create_operational_oq.queue_id);
4941 	put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4942 		&request.data.create_operational_oq.element_array_addr);
4943 	put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4944 		&request.data.create_operational_oq.pi_addr);
4945 	put_unaligned_le16(ctrl_info->num_elements_per_oq,
4946 		&request.data.create_operational_oq.num_elements);
4947 	put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4948 		&request.data.create_operational_oq.element_length);
4949 	request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4950 	put_unaligned_le16(queue_group->int_msg_num,
4951 		&request.data.create_operational_oq.int_msg_num);
4952 
4953 	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4954 		&response);
4955 	if (rc) {
4956 		dev_err(&ctrl_info->pci_dev->dev,
4957 			"error creating outbound queue\n");
4958 		return rc;
4959 	}
4960 
4961 	queue_group->oq_ci = ctrl_info->iomem_base +
4962 		PQI_DEVICE_REGISTERS_OFFSET +
4963 		get_unaligned_le64(
4964 			&response.data.create_operational_oq.oq_ci_offset);
4965 
4966 	return 0;
4967 }
4968 
4969 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4970 {
4971 	int rc;
4972 	unsigned int i;
4973 
4974 	rc = pqi_create_event_queue(ctrl_info);
4975 	if (rc) {
4976 		dev_err(&ctrl_info->pci_dev->dev,
4977 			"error creating event queue\n");
4978 		return rc;
4979 	}
4980 
4981 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4982 		rc = pqi_create_queue_group(ctrl_info, i);
4983 		if (rc) {
4984 			dev_err(&ctrl_info->pci_dev->dev,
4985 				"error creating queue group number %u/%u\n",
4986 				i, ctrl_info->num_queue_groups);
4987 			return rc;
4988 		}
4989 	}
4990 
4991 	return 0;
4992 }
4993 
4994 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH	\
4995 	struct_size((struct pqi_event_config *)0, descriptors, PQI_MAX_EVENT_DESCRIPTORS)
4996 
4997 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4998 	bool enable_events)
4999 {
5000 	int rc;
5001 	unsigned int i;
5002 	struct pqi_event_config *event_config;
5003 	struct pqi_event_descriptor *event_descriptor;
5004 	struct pqi_general_management_request request;
5005 
5006 	event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5007 		GFP_KERNEL);
5008 	if (!event_config)
5009 		return -ENOMEM;
5010 
5011 	memset(&request, 0, sizeof(request));
5012 
5013 	request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
5014 	put_unaligned_le16(offsetof(struct pqi_general_management_request,
5015 		data.report_event_configuration.sg_descriptors[1]) -
5016 		PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5017 	put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5018 		&request.data.report_event_configuration.buffer_length);
5019 
5020 	rc = pqi_map_single(ctrl_info->pci_dev,
5021 		request.data.report_event_configuration.sg_descriptors,
5022 		event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5023 		DMA_FROM_DEVICE);
5024 	if (rc)
5025 		goto out;
5026 
5027 	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5028 
5029 	pqi_pci_unmap(ctrl_info->pci_dev,
5030 		request.data.report_event_configuration.sg_descriptors, 1,
5031 		DMA_FROM_DEVICE);
5032 
5033 	if (rc)
5034 		goto out;
5035 
5036 	for (i = 0; i < event_config->num_event_descriptors; i++) {
5037 		event_descriptor = &event_config->descriptors[i];
5038 		if (enable_events &&
5039 			pqi_is_supported_event(event_descriptor->event_type))
5040 				put_unaligned_le16(ctrl_info->event_queue.oq_id,
5041 					&event_descriptor->oq_id);
5042 		else
5043 			put_unaligned_le16(0, &event_descriptor->oq_id);
5044 	}
5045 
5046 	memset(&request, 0, sizeof(request));
5047 
5048 	request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
5049 	put_unaligned_le16(offsetof(struct pqi_general_management_request,
5050 		data.report_event_configuration.sg_descriptors[1]) -
5051 		PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5052 	put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5053 		&request.data.report_event_configuration.buffer_length);
5054 
5055 	rc = pqi_map_single(ctrl_info->pci_dev,
5056 		request.data.report_event_configuration.sg_descriptors,
5057 		event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5058 		DMA_TO_DEVICE);
5059 	if (rc)
5060 		goto out;
5061 
5062 	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5063 
5064 	pqi_pci_unmap(ctrl_info->pci_dev,
5065 		request.data.report_event_configuration.sg_descriptors, 1,
5066 		DMA_TO_DEVICE);
5067 
5068 out:
5069 	kfree(event_config);
5070 
5071 	return rc;
5072 }
5073 
5074 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
5075 {
5076 	return pqi_configure_events(ctrl_info, true);
5077 }
5078 
5079 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
5080 {
5081 	unsigned int i;
5082 	struct device *dev;
5083 	size_t sg_chain_buffer_length;
5084 	struct pqi_io_request *io_request;
5085 
5086 	if (!ctrl_info->io_request_pool)
5087 		return;
5088 
5089 	dev = &ctrl_info->pci_dev->dev;
5090 	sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5091 	io_request = ctrl_info->io_request_pool;
5092 
5093 	for (i = 0; i < ctrl_info->max_io_slots; i++) {
5094 		kfree(io_request->iu);
5095 		if (!io_request->sg_chain_buffer)
5096 			break;
5097 		dma_free_coherent(dev, sg_chain_buffer_length,
5098 			io_request->sg_chain_buffer,
5099 			io_request->sg_chain_buffer_dma_handle);
5100 		io_request++;
5101 	}
5102 
5103 	kfree(ctrl_info->io_request_pool);
5104 	ctrl_info->io_request_pool = NULL;
5105 }
5106 
5107 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
5108 {
5109 	ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
5110 				     ctrl_info->error_buffer_length,
5111 				     &ctrl_info->error_buffer_dma_handle,
5112 				     GFP_KERNEL);
5113 	if (!ctrl_info->error_buffer)
5114 		return -ENOMEM;
5115 
5116 	return 0;
5117 }
5118 
5119 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
5120 {
5121 	unsigned int i;
5122 	void *sg_chain_buffer;
5123 	size_t sg_chain_buffer_length;
5124 	dma_addr_t sg_chain_buffer_dma_handle;
5125 	struct device *dev;
5126 	struct pqi_io_request *io_request;
5127 
5128 	ctrl_info->io_request_pool = kcalloc(ctrl_info->max_io_slots,
5129 		sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
5130 
5131 	if (!ctrl_info->io_request_pool) {
5132 		dev_err(&ctrl_info->pci_dev->dev,
5133 			"failed to allocate I/O request pool\n");
5134 		goto error;
5135 	}
5136 
5137 	dev = &ctrl_info->pci_dev->dev;
5138 	sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5139 	io_request = ctrl_info->io_request_pool;
5140 
5141 	for (i = 0; i < ctrl_info->max_io_slots; i++) {
5142 		io_request->iu = kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
5143 
5144 		if (!io_request->iu) {
5145 			dev_err(&ctrl_info->pci_dev->dev,
5146 				"failed to allocate IU buffers\n");
5147 			goto error;
5148 		}
5149 
5150 		sg_chain_buffer = dma_alloc_coherent(dev,
5151 			sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
5152 			GFP_KERNEL);
5153 
5154 		if (!sg_chain_buffer) {
5155 			dev_err(&ctrl_info->pci_dev->dev,
5156 				"failed to allocate PQI scatter-gather chain buffers\n");
5157 			goto error;
5158 		}
5159 
5160 		io_request->index = i;
5161 		io_request->sg_chain_buffer = sg_chain_buffer;
5162 		io_request->sg_chain_buffer_dma_handle = sg_chain_buffer_dma_handle;
5163 		io_request++;
5164 	}
5165 
5166 	return 0;
5167 
5168 error:
5169 	pqi_free_all_io_requests(ctrl_info);
5170 
5171 	return -ENOMEM;
5172 }
5173 
5174 /*
5175  * Calculate required resources that are sized based on max. outstanding
5176  * requests and max. transfer size.
5177  */
5178 
5179 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
5180 {
5181 	u32 max_transfer_size;
5182 	u32 max_sg_entries;
5183 
5184 	ctrl_info->scsi_ml_can_queue =
5185 		ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
5186 	ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
5187 
5188 	ctrl_info->error_buffer_length =
5189 		ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
5190 
5191 	if (reset_devices)
5192 		max_transfer_size = min(ctrl_info->max_transfer_size,
5193 			PQI_MAX_TRANSFER_SIZE_KDUMP);
5194 	else
5195 		max_transfer_size = min(ctrl_info->max_transfer_size,
5196 			PQI_MAX_TRANSFER_SIZE);
5197 
5198 	max_sg_entries = max_transfer_size / PAGE_SIZE;
5199 
5200 	/* +1 to cover when the buffer is not page-aligned. */
5201 	max_sg_entries++;
5202 
5203 	max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
5204 
5205 	max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
5206 
5207 	ctrl_info->sg_chain_buffer_length =
5208 		(max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
5209 		PQI_EXTRA_SGL_MEMORY;
5210 	ctrl_info->sg_tablesize = max_sg_entries;
5211 	ctrl_info->max_sectors = max_transfer_size / 512;
5212 }
5213 
5214 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
5215 {
5216 	int num_queue_groups;
5217 	u16 num_elements_per_iq;
5218 	u16 num_elements_per_oq;
5219 
5220 	if (reset_devices) {
5221 		num_queue_groups = 1;
5222 	} else {
5223 		int num_cpus;
5224 		int max_queue_groups;
5225 
5226 		max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
5227 			ctrl_info->max_outbound_queues - 1);
5228 		max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
5229 
5230 		num_cpus = num_online_cpus();
5231 		num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
5232 		num_queue_groups = min(num_queue_groups, max_queue_groups);
5233 	}
5234 
5235 	ctrl_info->num_queue_groups = num_queue_groups;
5236 	ctrl_info->max_hw_queue_index = num_queue_groups - 1;
5237 
5238 	/*
5239 	 * Make sure that the max. inbound IU length is an even multiple
5240 	 * of our inbound element length.
5241 	 */
5242 	ctrl_info->max_inbound_iu_length =
5243 		(ctrl_info->max_inbound_iu_length_per_firmware /
5244 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
5245 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
5246 
5247 	num_elements_per_iq =
5248 		(ctrl_info->max_inbound_iu_length /
5249 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
5250 
5251 	/* Add one because one element in each queue is unusable. */
5252 	num_elements_per_iq++;
5253 
5254 	num_elements_per_iq = min(num_elements_per_iq,
5255 		ctrl_info->max_elements_per_iq);
5256 
5257 	num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
5258 	num_elements_per_oq = min(num_elements_per_oq,
5259 		ctrl_info->max_elements_per_oq);
5260 
5261 	ctrl_info->num_elements_per_iq = num_elements_per_iq;
5262 	ctrl_info->num_elements_per_oq = num_elements_per_oq;
5263 
5264 	ctrl_info->max_sg_per_iu =
5265 		((ctrl_info->max_inbound_iu_length -
5266 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5267 		sizeof(struct pqi_sg_descriptor)) +
5268 		PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
5269 
5270 	ctrl_info->max_sg_per_r56_iu =
5271 		((ctrl_info->max_inbound_iu_length -
5272 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5273 		sizeof(struct pqi_sg_descriptor)) +
5274 		PQI_MAX_EMBEDDED_R56_SG_DESCRIPTORS;
5275 }
5276 
5277 static inline void pqi_set_sg_descriptor(struct pqi_sg_descriptor *sg_descriptor,
5278 	struct scatterlist *sg)
5279 {
5280 	u64 address = (u64)sg_dma_address(sg);
5281 	unsigned int length = sg_dma_len(sg);
5282 
5283 	put_unaligned_le64(address, &sg_descriptor->address);
5284 	put_unaligned_le32(length, &sg_descriptor->length);
5285 	put_unaligned_le32(0, &sg_descriptor->flags);
5286 }
5287 
5288 static unsigned int pqi_build_sg_list(struct pqi_sg_descriptor *sg_descriptor,
5289 	struct scatterlist *sg, int sg_count, struct pqi_io_request *io_request,
5290 	int max_sg_per_iu, bool *chained)
5291 {
5292 	int i;
5293 	unsigned int num_sg_in_iu;
5294 
5295 	*chained = false;
5296 	i = 0;
5297 	num_sg_in_iu = 0;
5298 	max_sg_per_iu--;	/* Subtract 1 to leave room for chain marker. */
5299 
5300 	while (1) {
5301 		pqi_set_sg_descriptor(sg_descriptor, sg);
5302 		if (!*chained)
5303 			num_sg_in_iu++;
5304 		i++;
5305 		if (i == sg_count)
5306 			break;
5307 		sg_descriptor++;
5308 		if (i == max_sg_per_iu) {
5309 			put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
5310 				&sg_descriptor->address);
5311 			put_unaligned_le32((sg_count - num_sg_in_iu) * sizeof(*sg_descriptor),
5312 				&sg_descriptor->length);
5313 			put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
5314 			*chained = true;
5315 			num_sg_in_iu++;
5316 			sg_descriptor = io_request->sg_chain_buffer;
5317 		}
5318 		sg = sg_next(sg);
5319 	}
5320 
5321 	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
5322 
5323 	return num_sg_in_iu;
5324 }
5325 
5326 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
5327 	struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
5328 	struct pqi_io_request *io_request)
5329 {
5330 	u16 iu_length;
5331 	int sg_count;
5332 	bool chained;
5333 	unsigned int num_sg_in_iu;
5334 	struct scatterlist *sg;
5335 	struct pqi_sg_descriptor *sg_descriptor;
5336 
5337 	sg_count = scsi_dma_map(scmd);
5338 	if (sg_count < 0)
5339 		return sg_count;
5340 
5341 	iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5342 		PQI_REQUEST_HEADER_LENGTH;
5343 
5344 	if (sg_count == 0)
5345 		goto out;
5346 
5347 	sg = scsi_sglist(scmd);
5348 	sg_descriptor = request->sg_descriptors;
5349 
5350 	num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5351 		ctrl_info->max_sg_per_iu, &chained);
5352 
5353 	request->partial = chained;
5354 	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5355 
5356 out:
5357 	put_unaligned_le16(iu_length, &request->header.iu_length);
5358 
5359 	return 0;
5360 }
5361 
5362 static int pqi_build_aio_r1_sg_list(struct pqi_ctrl_info *ctrl_info,
5363 	struct pqi_aio_r1_path_request *request, struct scsi_cmnd *scmd,
5364 	struct pqi_io_request *io_request)
5365 {
5366 	u16 iu_length;
5367 	int sg_count;
5368 	bool chained;
5369 	unsigned int num_sg_in_iu;
5370 	struct scatterlist *sg;
5371 	struct pqi_sg_descriptor *sg_descriptor;
5372 
5373 	sg_count = scsi_dma_map(scmd);
5374 	if (sg_count < 0)
5375 		return sg_count;
5376 
5377 	iu_length = offsetof(struct pqi_aio_r1_path_request, sg_descriptors) -
5378 		PQI_REQUEST_HEADER_LENGTH;
5379 	num_sg_in_iu = 0;
5380 
5381 	if (sg_count == 0)
5382 		goto out;
5383 
5384 	sg = scsi_sglist(scmd);
5385 	sg_descriptor = request->sg_descriptors;
5386 
5387 	num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5388 		ctrl_info->max_sg_per_iu, &chained);
5389 
5390 	request->partial = chained;
5391 	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5392 
5393 out:
5394 	put_unaligned_le16(iu_length, &request->header.iu_length);
5395 	request->num_sg_descriptors = num_sg_in_iu;
5396 
5397 	return 0;
5398 }
5399 
5400 static int pqi_build_aio_r56_sg_list(struct pqi_ctrl_info *ctrl_info,
5401 	struct pqi_aio_r56_path_request *request, struct scsi_cmnd *scmd,
5402 	struct pqi_io_request *io_request)
5403 {
5404 	u16 iu_length;
5405 	int sg_count;
5406 	bool chained;
5407 	unsigned int num_sg_in_iu;
5408 	struct scatterlist *sg;
5409 	struct pqi_sg_descriptor *sg_descriptor;
5410 
5411 	sg_count = scsi_dma_map(scmd);
5412 	if (sg_count < 0)
5413 		return sg_count;
5414 
5415 	iu_length = offsetof(struct pqi_aio_r56_path_request, sg_descriptors) -
5416 		PQI_REQUEST_HEADER_LENGTH;
5417 	num_sg_in_iu = 0;
5418 
5419 	if (sg_count != 0) {
5420 		sg = scsi_sglist(scmd);
5421 		sg_descriptor = request->sg_descriptors;
5422 
5423 		num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5424 			ctrl_info->max_sg_per_r56_iu, &chained);
5425 
5426 		request->partial = chained;
5427 		iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5428 	}
5429 
5430 	put_unaligned_le16(iu_length, &request->header.iu_length);
5431 	request->num_sg_descriptors = num_sg_in_iu;
5432 
5433 	return 0;
5434 }
5435 
5436 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
5437 	struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
5438 	struct pqi_io_request *io_request)
5439 {
5440 	u16 iu_length;
5441 	int sg_count;
5442 	bool chained;
5443 	unsigned int num_sg_in_iu;
5444 	struct scatterlist *sg;
5445 	struct pqi_sg_descriptor *sg_descriptor;
5446 
5447 	sg_count = scsi_dma_map(scmd);
5448 	if (sg_count < 0)
5449 		return sg_count;
5450 
5451 	iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
5452 		PQI_REQUEST_HEADER_LENGTH;
5453 	num_sg_in_iu = 0;
5454 
5455 	if (sg_count == 0)
5456 		goto out;
5457 
5458 	sg = scsi_sglist(scmd);
5459 	sg_descriptor = request->sg_descriptors;
5460 
5461 	num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5462 		ctrl_info->max_sg_per_iu, &chained);
5463 
5464 	request->partial = chained;
5465 	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5466 
5467 out:
5468 	put_unaligned_le16(iu_length, &request->header.iu_length);
5469 	request->num_sg_descriptors = num_sg_in_iu;
5470 
5471 	return 0;
5472 }
5473 
5474 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
5475 	void *context)
5476 {
5477 	struct scsi_cmnd *scmd;
5478 
5479 	scmd = io_request->scmd;
5480 	pqi_free_io_request(io_request);
5481 	scsi_dma_unmap(scmd);
5482 	pqi_scsi_done(scmd);
5483 }
5484 
5485 static int pqi_raid_submit_scsi_cmd_with_io_request(
5486 	struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
5487 	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5488 	struct pqi_queue_group *queue_group)
5489 {
5490 	int rc;
5491 	size_t cdb_length;
5492 	struct pqi_raid_path_request *request;
5493 
5494 	io_request->io_complete_callback = pqi_raid_io_complete;
5495 	io_request->scmd = scmd;
5496 
5497 	request = io_request->iu;
5498 	memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
5499 
5500 	request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5501 	put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5502 	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5503 	put_unaligned_le16(io_request->index, &request->request_id);
5504 	request->error_index = request->request_id;
5505 	memcpy(request->lun_number, device->scsi3addr, sizeof(request->lun_number));
5506 	request->ml_device_lun_number = (u8)scmd->device->lun;
5507 
5508 	cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
5509 	memcpy(request->cdb, scmd->cmnd, cdb_length);
5510 
5511 	switch (cdb_length) {
5512 	case 6:
5513 	case 10:
5514 	case 12:
5515 	case 16:
5516 		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5517 		break;
5518 	case 20:
5519 		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_4;
5520 		break;
5521 	case 24:
5522 		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_8;
5523 		break;
5524 	case 28:
5525 		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_12;
5526 		break;
5527 	case 32:
5528 	default:
5529 		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_16;
5530 		break;
5531 	}
5532 
5533 	switch (scmd->sc_data_direction) {
5534 	case DMA_FROM_DEVICE:
5535 		request->data_direction = SOP_READ_FLAG;
5536 		break;
5537 	case DMA_TO_DEVICE:
5538 		request->data_direction = SOP_WRITE_FLAG;
5539 		break;
5540 	case DMA_NONE:
5541 		request->data_direction = SOP_NO_DIRECTION_FLAG;
5542 		break;
5543 	case DMA_BIDIRECTIONAL:
5544 		request->data_direction = SOP_BIDIRECTIONAL;
5545 		break;
5546 	default:
5547 		dev_err(&ctrl_info->pci_dev->dev,
5548 			"unknown data direction: %d\n",
5549 			scmd->sc_data_direction);
5550 		break;
5551 	}
5552 
5553 	rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5554 	if (rc) {
5555 		pqi_free_io_request(io_request);
5556 		return SCSI_MLQUEUE_HOST_BUSY;
5557 	}
5558 
5559 	pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5560 
5561 	return 0;
5562 }
5563 
5564 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5565 	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5566 	struct pqi_queue_group *queue_group)
5567 {
5568 	struct pqi_io_request *io_request;
5569 
5570 	io_request = pqi_alloc_io_request(ctrl_info);
5571 
5572 	return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5573 		device, scmd, queue_group);
5574 }
5575 
5576 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5577 {
5578 	struct scsi_cmnd *scmd;
5579 	struct pqi_scsi_dev *device;
5580 	struct pqi_ctrl_info *ctrl_info;
5581 
5582 	if (!io_request->raid_bypass)
5583 		return false;
5584 
5585 	scmd = io_request->scmd;
5586 	if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5587 		return false;
5588 	if (host_byte(scmd->result) == DID_NO_CONNECT)
5589 		return false;
5590 
5591 	device = scmd->device->hostdata;
5592 	if (pqi_device_offline(device) || pqi_device_in_remove(device))
5593 		return false;
5594 
5595 	ctrl_info = shost_to_hba(scmd->device->host);
5596 	if (pqi_ctrl_offline(ctrl_info))
5597 		return false;
5598 
5599 	return true;
5600 }
5601 
5602 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5603 	void *context)
5604 {
5605 	struct scsi_cmnd *scmd;
5606 
5607 	scmd = io_request->scmd;
5608 	scsi_dma_unmap(scmd);
5609 	if (io_request->status == -EAGAIN || pqi_raid_bypass_retry_needed(io_request)) {
5610 		set_host_byte(scmd, DID_IMM_RETRY);
5611 		pqi_cmd_priv(scmd)->this_residual++;
5612 	}
5613 
5614 	pqi_free_io_request(io_request);
5615 	pqi_scsi_done(scmd);
5616 }
5617 
5618 static inline bool pqi_is_io_high_priority(struct pqi_ctrl_info *ctrl_info,
5619 	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd)
5620 {
5621 	bool io_high_prio;
5622 	int priority_class;
5623 
5624 	io_high_prio = false;
5625 
5626 	if (device->ncq_prio_enable) {
5627 		priority_class =
5628 			IOPRIO_PRIO_CLASS(req_get_ioprio(scsi_cmd_to_rq(scmd)));
5629 		if (priority_class == IOPRIO_CLASS_RT) {
5630 			/* Set NCQ priority for read/write commands. */
5631 			switch (scmd->cmnd[0]) {
5632 			case WRITE_16:
5633 			case READ_16:
5634 			case WRITE_12:
5635 			case READ_12:
5636 			case WRITE_10:
5637 			case READ_10:
5638 			case WRITE_6:
5639 			case READ_6:
5640 				io_high_prio = true;
5641 				break;
5642 			}
5643 		}
5644 	}
5645 
5646 	return io_high_prio;
5647 }
5648 
5649 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5650 	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5651 	struct pqi_queue_group *queue_group)
5652 {
5653 	bool io_high_prio;
5654 
5655 	io_high_prio = pqi_is_io_high_priority(ctrl_info, device, scmd);
5656 
5657 	return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5658 		scmd->cmnd, scmd->cmd_len, queue_group, NULL,
5659 		false, io_high_prio);
5660 }
5661 
5662 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5663 	struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5664 	unsigned int cdb_length, struct pqi_queue_group *queue_group,
5665 	struct pqi_encryption_info *encryption_info, bool raid_bypass,
5666 	bool io_high_prio)
5667 {
5668 	int rc;
5669 	struct pqi_io_request *io_request;
5670 	struct pqi_aio_path_request *request;
5671 	struct pqi_scsi_dev *device;
5672 
5673 	device = scmd->device->hostdata;
5674 	io_request = pqi_alloc_io_request(ctrl_info);
5675 	io_request->io_complete_callback = pqi_aio_io_complete;
5676 	io_request->scmd = scmd;
5677 	io_request->raid_bypass = raid_bypass;
5678 
5679 	request = io_request->iu;
5680 	memset(request, 0, offsetof(struct pqi_aio_path_request, sg_descriptors));
5681 
5682 	request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5683 	put_unaligned_le32(aio_handle, &request->nexus_id);
5684 	put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5685 	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5686 	request->command_priority = io_high_prio;
5687 	put_unaligned_le16(io_request->index, &request->request_id);
5688 	request->error_index = request->request_id;
5689 	if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
5690 		put_unaligned_le64(((scmd->device->lun) << 8), &request->lun_number);
5691 	if (cdb_length > sizeof(request->cdb))
5692 		cdb_length = sizeof(request->cdb);
5693 	request->cdb_length = cdb_length;
5694 	memcpy(request->cdb, cdb, cdb_length);
5695 
5696 	switch (scmd->sc_data_direction) {
5697 	case DMA_TO_DEVICE:
5698 		request->data_direction = SOP_READ_FLAG;
5699 		break;
5700 	case DMA_FROM_DEVICE:
5701 		request->data_direction = SOP_WRITE_FLAG;
5702 		break;
5703 	case DMA_NONE:
5704 		request->data_direction = SOP_NO_DIRECTION_FLAG;
5705 		break;
5706 	case DMA_BIDIRECTIONAL:
5707 		request->data_direction = SOP_BIDIRECTIONAL;
5708 		break;
5709 	default:
5710 		dev_err(&ctrl_info->pci_dev->dev,
5711 			"unknown data direction: %d\n",
5712 			scmd->sc_data_direction);
5713 		break;
5714 	}
5715 
5716 	if (encryption_info) {
5717 		request->encryption_enable = true;
5718 		put_unaligned_le16(encryption_info->data_encryption_key_index,
5719 			&request->data_encryption_key_index);
5720 		put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5721 			&request->encrypt_tweak_lower);
5722 		put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5723 			&request->encrypt_tweak_upper);
5724 	}
5725 
5726 	rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5727 	if (rc) {
5728 		pqi_free_io_request(io_request);
5729 		return SCSI_MLQUEUE_HOST_BUSY;
5730 	}
5731 
5732 	pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5733 
5734 	return 0;
5735 }
5736 
5737 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
5738 	struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5739 	struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5740 	struct pqi_scsi_dev_raid_map_data *rmd)
5741 {
5742 	int rc;
5743 	struct pqi_io_request *io_request;
5744 	struct pqi_aio_r1_path_request *r1_request;
5745 
5746 	io_request = pqi_alloc_io_request(ctrl_info);
5747 	io_request->io_complete_callback = pqi_aio_io_complete;
5748 	io_request->scmd = scmd;
5749 	io_request->raid_bypass = true;
5750 
5751 	r1_request = io_request->iu;
5752 	memset(r1_request, 0, offsetof(struct pqi_aio_r1_path_request, sg_descriptors));
5753 
5754 	r1_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID1_IO;
5755 	put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r1_request->volume_id);
5756 	r1_request->num_drives = rmd->num_it_nexus_entries;
5757 	put_unaligned_le32(rmd->it_nexus[0], &r1_request->it_nexus_1);
5758 	put_unaligned_le32(rmd->it_nexus[1], &r1_request->it_nexus_2);
5759 	if (rmd->num_it_nexus_entries == 3)
5760 		put_unaligned_le32(rmd->it_nexus[2], &r1_request->it_nexus_3);
5761 
5762 	put_unaligned_le32(scsi_bufflen(scmd), &r1_request->data_length);
5763 	r1_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5764 	put_unaligned_le16(io_request->index, &r1_request->request_id);
5765 	r1_request->error_index = r1_request->request_id;
5766 	if (rmd->cdb_length > sizeof(r1_request->cdb))
5767 		rmd->cdb_length = sizeof(r1_request->cdb);
5768 	r1_request->cdb_length = rmd->cdb_length;
5769 	memcpy(r1_request->cdb, rmd->cdb, rmd->cdb_length);
5770 
5771 	/* The direction is always write. */
5772 	r1_request->data_direction = SOP_READ_FLAG;
5773 
5774 	if (encryption_info) {
5775 		r1_request->encryption_enable = true;
5776 		put_unaligned_le16(encryption_info->data_encryption_key_index,
5777 				&r1_request->data_encryption_key_index);
5778 		put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5779 				&r1_request->encrypt_tweak_lower);
5780 		put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5781 				&r1_request->encrypt_tweak_upper);
5782 	}
5783 
5784 	rc = pqi_build_aio_r1_sg_list(ctrl_info, r1_request, scmd, io_request);
5785 	if (rc) {
5786 		pqi_free_io_request(io_request);
5787 		return SCSI_MLQUEUE_HOST_BUSY;
5788 	}
5789 
5790 	pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5791 
5792 	return 0;
5793 }
5794 
5795 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
5796 	struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5797 	struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5798 	struct pqi_scsi_dev_raid_map_data *rmd)
5799 {
5800 	int rc;
5801 	struct pqi_io_request *io_request;
5802 	struct pqi_aio_r56_path_request *r56_request;
5803 
5804 	io_request = pqi_alloc_io_request(ctrl_info);
5805 	io_request->io_complete_callback = pqi_aio_io_complete;
5806 	io_request->scmd = scmd;
5807 	io_request->raid_bypass = true;
5808 
5809 	r56_request = io_request->iu;
5810 	memset(r56_request, 0, offsetof(struct pqi_aio_r56_path_request, sg_descriptors));
5811 
5812 	if (device->raid_level == SA_RAID_5 || device->raid_level == SA_RAID_51)
5813 		r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID5_IO;
5814 	else
5815 		r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID6_IO;
5816 
5817 	put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r56_request->volume_id);
5818 	put_unaligned_le32(rmd->aio_handle, &r56_request->data_it_nexus);
5819 	put_unaligned_le32(rmd->p_parity_it_nexus, &r56_request->p_parity_it_nexus);
5820 	if (rmd->raid_level == SA_RAID_6) {
5821 		put_unaligned_le32(rmd->q_parity_it_nexus, &r56_request->q_parity_it_nexus);
5822 		r56_request->xor_multiplier = rmd->xor_mult;
5823 	}
5824 	put_unaligned_le32(scsi_bufflen(scmd), &r56_request->data_length);
5825 	r56_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5826 	put_unaligned_le64(rmd->row, &r56_request->row);
5827 
5828 	put_unaligned_le16(io_request->index, &r56_request->request_id);
5829 	r56_request->error_index = r56_request->request_id;
5830 
5831 	if (rmd->cdb_length > sizeof(r56_request->cdb))
5832 		rmd->cdb_length = sizeof(r56_request->cdb);
5833 	r56_request->cdb_length = rmd->cdb_length;
5834 	memcpy(r56_request->cdb, rmd->cdb, rmd->cdb_length);
5835 
5836 	/* The direction is always write. */
5837 	r56_request->data_direction = SOP_READ_FLAG;
5838 
5839 	if (encryption_info) {
5840 		r56_request->encryption_enable = true;
5841 		put_unaligned_le16(encryption_info->data_encryption_key_index,
5842 				&r56_request->data_encryption_key_index);
5843 		put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5844 				&r56_request->encrypt_tweak_lower);
5845 		put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5846 				&r56_request->encrypt_tweak_upper);
5847 	}
5848 
5849 	rc = pqi_build_aio_r56_sg_list(ctrl_info, r56_request, scmd, io_request);
5850 	if (rc) {
5851 		pqi_free_io_request(io_request);
5852 		return SCSI_MLQUEUE_HOST_BUSY;
5853 	}
5854 
5855 	pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5856 
5857 	return 0;
5858 }
5859 
5860 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5861 	struct scsi_cmnd *scmd)
5862 {
5863 	u16 hw_queue;
5864 
5865 	hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scsi_cmd_to_rq(scmd)));
5866 	if (hw_queue > ctrl_info->max_hw_queue_index)
5867 		hw_queue = 0;
5868 
5869 	return hw_queue;
5870 }
5871 
5872 static inline bool pqi_is_bypass_eligible_request(struct scsi_cmnd *scmd)
5873 {
5874 	if (blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))
5875 		return false;
5876 
5877 	return pqi_cmd_priv(scmd)->this_residual == 0;
5878 }
5879 
5880 /*
5881  * This function gets called just before we hand the completed SCSI request
5882  * back to the SML.
5883  */
5884 
5885 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5886 {
5887 	struct pqi_scsi_dev *device;
5888 
5889 	if (!scmd->device) {
5890 		set_host_byte(scmd, DID_NO_CONNECT);
5891 		return;
5892 	}
5893 
5894 	device = scmd->device->hostdata;
5895 	if (!device) {
5896 		set_host_byte(scmd, DID_NO_CONNECT);
5897 		return;
5898 	}
5899 
5900 	atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
5901 }
5902 
5903 static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info,
5904 	struct scsi_cmnd *scmd)
5905 {
5906 	u32 oldest_jiffies;
5907 	u8 lru_index;
5908 	int i;
5909 	int rc;
5910 	struct pqi_scsi_dev *device;
5911 	struct pqi_stream_data *pqi_stream_data;
5912 	struct pqi_scsi_dev_raid_map_data rmd;
5913 
5914 	if (!ctrl_info->enable_stream_detection)
5915 		return false;
5916 
5917 	rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
5918 	if (rc)
5919 		return false;
5920 
5921 	/* Check writes only. */
5922 	if (!rmd.is_write)
5923 		return false;
5924 
5925 	device = scmd->device->hostdata;
5926 
5927 	/* Check for RAID 5/6 streams. */
5928 	if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6)
5929 		return false;
5930 
5931 	/*
5932 	 * If controller does not support AIO RAID{5,6} writes, need to send
5933 	 * requests down non-AIO path.
5934 	 */
5935 	if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) ||
5936 		(device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes))
5937 		return true;
5938 
5939 	lru_index = 0;
5940 	oldest_jiffies = INT_MAX;
5941 	for (i = 0; i < NUM_STREAMS_PER_LUN; i++) {
5942 		pqi_stream_data = &device->stream_data[i];
5943 		/*
5944 		 * Check for adjacent request or request is within
5945 		 * the previous request.
5946 		 */
5947 		if ((pqi_stream_data->next_lba &&
5948 			rmd.first_block >= pqi_stream_data->next_lba) &&
5949 			rmd.first_block <= pqi_stream_data->next_lba +
5950 				rmd.block_cnt) {
5951 			pqi_stream_data->next_lba = rmd.first_block +
5952 				rmd.block_cnt;
5953 			pqi_stream_data->last_accessed = jiffies;
5954 			return true;
5955 		}
5956 
5957 		/* unused entry */
5958 		if (pqi_stream_data->last_accessed == 0) {
5959 			lru_index = i;
5960 			break;
5961 		}
5962 
5963 		/* Find entry with oldest last accessed time. */
5964 		if (pqi_stream_data->last_accessed <= oldest_jiffies) {
5965 			oldest_jiffies = pqi_stream_data->last_accessed;
5966 			lru_index = i;
5967 		}
5968 	}
5969 
5970 	/* Set LRU entry. */
5971 	pqi_stream_data = &device->stream_data[lru_index];
5972 	pqi_stream_data->last_accessed = jiffies;
5973 	pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt;
5974 
5975 	return false;
5976 }
5977 
5978 static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
5979 {
5980 	int rc;
5981 	struct pqi_ctrl_info *ctrl_info;
5982 	struct pqi_scsi_dev *device;
5983 	u16 hw_queue;
5984 	struct pqi_queue_group *queue_group;
5985 	bool raid_bypassed;
5986 
5987 	device = scmd->device->hostdata;
5988 
5989 	if (!device) {
5990 		set_host_byte(scmd, DID_NO_CONNECT);
5991 		pqi_scsi_done(scmd);
5992 		return 0;
5993 	}
5994 
5995 	atomic_inc(&device->scsi_cmds_outstanding[scmd->device->lun]);
5996 
5997 	ctrl_info = shost_to_hba(shost);
5998 
5999 	if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
6000 		set_host_byte(scmd, DID_NO_CONNECT);
6001 		pqi_scsi_done(scmd);
6002 		return 0;
6003 	}
6004 
6005 	if (pqi_ctrl_blocked(ctrl_info)) {
6006 		rc = SCSI_MLQUEUE_HOST_BUSY;
6007 		goto out;
6008 	}
6009 
6010 	/*
6011 	 * This is necessary because the SML doesn't zero out this field during
6012 	 * error recovery.
6013 	 */
6014 	scmd->result = 0;
6015 
6016 	hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
6017 	queue_group = &ctrl_info->queue_groups[hw_queue];
6018 
6019 	if (pqi_is_logical_device(device)) {
6020 		raid_bypassed = false;
6021 		if (device->raid_bypass_enabled &&
6022 			pqi_is_bypass_eligible_request(scmd) &&
6023 			!pqi_is_parity_write_stream(ctrl_info, scmd)) {
6024 			rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6025 			if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) {
6026 				raid_bypassed = true;
6027 				atomic_inc(&device->raid_bypass_cnt);
6028 			}
6029 		}
6030 		if (!raid_bypassed)
6031 			rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6032 	} else {
6033 		if (device->aio_enabled)
6034 			rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6035 		else
6036 			rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6037 	}
6038 
6039 out:
6040 	if (rc)
6041 		atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
6042 
6043 	return rc;
6044 }
6045 
6046 static unsigned int pqi_queued_io_count(struct pqi_ctrl_info *ctrl_info)
6047 {
6048 	unsigned int i;
6049 	unsigned int path;
6050 	unsigned long flags;
6051 	unsigned int queued_io_count;
6052 	struct pqi_queue_group *queue_group;
6053 	struct pqi_io_request *io_request;
6054 
6055 	queued_io_count = 0;
6056 
6057 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6058 		queue_group = &ctrl_info->queue_groups[i];
6059 		for (path = 0; path < 2; path++) {
6060 			spin_lock_irqsave(&queue_group->submit_lock[path], flags);
6061 			list_for_each_entry(io_request, &queue_group->request_list[path], request_list_entry)
6062 				queued_io_count++;
6063 			spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
6064 		}
6065 	}
6066 
6067 	return queued_io_count;
6068 }
6069 
6070 static unsigned int pqi_nonempty_inbound_queue_count(struct pqi_ctrl_info *ctrl_info)
6071 {
6072 	unsigned int i;
6073 	unsigned int path;
6074 	unsigned int nonempty_inbound_queue_count;
6075 	struct pqi_queue_group *queue_group;
6076 	pqi_index_t iq_pi;
6077 	pqi_index_t iq_ci;
6078 
6079 	nonempty_inbound_queue_count = 0;
6080 
6081 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6082 		queue_group = &ctrl_info->queue_groups[i];
6083 		for (path = 0; path < 2; path++) {
6084 			iq_pi = queue_group->iq_pi_copy[path];
6085 			iq_ci = readl(queue_group->iq_ci[path]);
6086 			if (iq_ci != iq_pi)
6087 				nonempty_inbound_queue_count++;
6088 		}
6089 	}
6090 
6091 	return nonempty_inbound_queue_count;
6092 }
6093 
6094 #define PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS	10
6095 
6096 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
6097 {
6098 	unsigned long start_jiffies;
6099 	unsigned long warning_timeout;
6100 	unsigned int queued_io_count;
6101 	unsigned int nonempty_inbound_queue_count;
6102 	bool displayed_warning;
6103 
6104 	displayed_warning = false;
6105 	start_jiffies = jiffies;
6106 	warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
6107 
6108 	while (1) {
6109 		queued_io_count = pqi_queued_io_count(ctrl_info);
6110 		nonempty_inbound_queue_count = pqi_nonempty_inbound_queue_count(ctrl_info);
6111 		if (queued_io_count == 0 && nonempty_inbound_queue_count == 0)
6112 			break;
6113 		pqi_check_ctrl_health(ctrl_info);
6114 		if (pqi_ctrl_offline(ctrl_info))
6115 			return -ENXIO;
6116 		if (time_after(jiffies, warning_timeout)) {
6117 			dev_warn(&ctrl_info->pci_dev->dev,
6118 				"waiting %u seconds for queued I/O to drain (queued I/O count: %u; non-empty inbound queue count: %u)\n",
6119 				jiffies_to_msecs(jiffies - start_jiffies) / 1000, queued_io_count, nonempty_inbound_queue_count);
6120 			displayed_warning = true;
6121 			warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + jiffies;
6122 		}
6123 		usleep_range(1000, 2000);
6124 	}
6125 
6126 	if (displayed_warning)
6127 		dev_warn(&ctrl_info->pci_dev->dev,
6128 			"queued I/O drained after waiting for %u seconds\n",
6129 			jiffies_to_msecs(jiffies - start_jiffies) / 1000);
6130 
6131 	return 0;
6132 }
6133 
6134 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
6135 	struct pqi_scsi_dev *device)
6136 {
6137 	unsigned int i;
6138 	unsigned int path;
6139 	struct pqi_queue_group *queue_group;
6140 	unsigned long flags;
6141 	struct pqi_io_request *io_request;
6142 	struct pqi_io_request *next;
6143 	struct scsi_cmnd *scmd;
6144 	struct pqi_scsi_dev *scsi_device;
6145 
6146 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6147 		queue_group = &ctrl_info->queue_groups[i];
6148 
6149 		for (path = 0; path < 2; path++) {
6150 			spin_lock_irqsave(
6151 				&queue_group->submit_lock[path], flags);
6152 
6153 			list_for_each_entry_safe(io_request, next,
6154 				&queue_group->request_list[path],
6155 				request_list_entry) {
6156 
6157 				scmd = io_request->scmd;
6158 				if (!scmd)
6159 					continue;
6160 
6161 				scsi_device = scmd->device->hostdata;
6162 				if (scsi_device != device)
6163 					continue;
6164 
6165 				list_del(&io_request->request_list_entry);
6166 				set_host_byte(scmd, DID_RESET);
6167 				pqi_free_io_request(io_request);
6168 				scsi_dma_unmap(scmd);
6169 				pqi_scsi_done(scmd);
6170 			}
6171 
6172 			spin_unlock_irqrestore(
6173 				&queue_group->submit_lock[path], flags);
6174 		}
6175 	}
6176 }
6177 
6178 #define PQI_PENDING_IO_WARNING_TIMEOUT_SECS	10
6179 
6180 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
6181 	struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs)
6182 {
6183 	int cmds_outstanding;
6184 	unsigned long start_jiffies;
6185 	unsigned long warning_timeout;
6186 	unsigned long msecs_waiting;
6187 
6188 	start_jiffies = jiffies;
6189 	warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
6190 
6191 	while ((cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun])) > 0) {
6192 		if (ctrl_info->ctrl_removal_state != PQI_CTRL_GRACEFUL_REMOVAL) {
6193 			pqi_check_ctrl_health(ctrl_info);
6194 			if (pqi_ctrl_offline(ctrl_info))
6195 				return -ENXIO;
6196 		}
6197 		msecs_waiting = jiffies_to_msecs(jiffies - start_jiffies);
6198 		if (msecs_waiting >= timeout_msecs) {
6199 			dev_err(&ctrl_info->pci_dev->dev,
6200 				"scsi %d:%d:%d:%d: timed out after %lu seconds waiting for %d outstanding command(s)\n",
6201 				ctrl_info->scsi_host->host_no, device->bus, device->target,
6202 				lun, msecs_waiting / 1000, cmds_outstanding);
6203 			return -ETIMEDOUT;
6204 		}
6205 		if (time_after(jiffies, warning_timeout)) {
6206 			dev_warn(&ctrl_info->pci_dev->dev,
6207 				"scsi %d:%d:%d:%d: waiting %lu seconds for %d outstanding command(s)\n",
6208 				ctrl_info->scsi_host->host_no, device->bus, device->target,
6209 				lun, msecs_waiting / 1000, cmds_outstanding);
6210 			warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + jiffies;
6211 		}
6212 		usleep_range(1000, 2000);
6213 	}
6214 
6215 	return 0;
6216 }
6217 
6218 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
6219 	void *context)
6220 {
6221 	struct completion *waiting = context;
6222 
6223 	complete(waiting);
6224 }
6225 
6226 #define PQI_LUN_RESET_POLL_COMPLETION_SECS	10
6227 
6228 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
6229 	struct pqi_scsi_dev *device, u8 lun, struct completion *wait)
6230 {
6231 	int rc;
6232 	unsigned int wait_secs;
6233 	int cmds_outstanding;
6234 
6235 	wait_secs = 0;
6236 
6237 	while (1) {
6238 		if (wait_for_completion_io_timeout(wait,
6239 			PQI_LUN_RESET_POLL_COMPLETION_SECS * HZ)) {
6240 			rc = 0;
6241 			break;
6242 		}
6243 
6244 		pqi_check_ctrl_health(ctrl_info);
6245 		if (pqi_ctrl_offline(ctrl_info)) {
6246 			rc = -ENXIO;
6247 			break;
6248 		}
6249 
6250 		wait_secs += PQI_LUN_RESET_POLL_COMPLETION_SECS;
6251 		cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun]);
6252 		dev_warn(&ctrl_info->pci_dev->dev,
6253 			"scsi %d:%d:%d:%d: waiting %u seconds for LUN reset to complete (%d command(s) outstanding)\n",
6254 			ctrl_info->scsi_host->host_no, device->bus, device->target, lun, wait_secs, cmds_outstanding);
6255 	}
6256 
6257 	return rc;
6258 }
6259 
6260 #define PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS	30
6261 
6262 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6263 {
6264 	int rc;
6265 	struct pqi_io_request *io_request;
6266 	DECLARE_COMPLETION_ONSTACK(wait);
6267 	struct pqi_task_management_request *request;
6268 	struct pqi_scsi_dev *device;
6269 
6270 	device = scmd->device->hostdata;
6271 	io_request = pqi_alloc_io_request(ctrl_info);
6272 	io_request->io_complete_callback = pqi_lun_reset_complete;
6273 	io_request->context = &wait;
6274 
6275 	request = io_request->iu;
6276 	memset(request, 0, sizeof(*request));
6277 
6278 	request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
6279 	put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
6280 		&request->header.iu_length);
6281 	put_unaligned_le16(io_request->index, &request->request_id);
6282 	memcpy(request->lun_number, device->scsi3addr,
6283 		sizeof(request->lun_number));
6284 	if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
6285 		request->ml_device_lun_number = (u8)scmd->device->lun;
6286 	request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
6287 	if (ctrl_info->tmf_iu_timeout_supported)
6288 		put_unaligned_le16(PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS, &request->timeout);
6289 
6290 	pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
6291 		io_request);
6292 
6293 	rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, (u8)scmd->device->lun, &wait);
6294 	if (rc == 0)
6295 		rc = io_request->status;
6296 
6297 	pqi_free_io_request(io_request);
6298 
6299 	return rc;
6300 }
6301 
6302 #define PQI_LUN_RESET_RETRIES				3
6303 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS		(10 * 1000)
6304 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS		(10 * 60 * 1000)
6305 #define PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS	(2 * 60 * 1000)
6306 
6307 static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6308 {
6309 	int reset_rc;
6310 	int wait_rc;
6311 	unsigned int retries;
6312 	unsigned long timeout_msecs;
6313 	struct pqi_scsi_dev *device;
6314 
6315 	device = scmd->device->hostdata;
6316 	for (retries = 0;;) {
6317 		reset_rc = pqi_lun_reset(ctrl_info, scmd);
6318 		if (reset_rc == 0 || reset_rc == -ENODEV || ++retries > PQI_LUN_RESET_RETRIES)
6319 			break;
6320 		msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
6321 	}
6322 
6323 	timeout_msecs = reset_rc ? PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS :
6324 		PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS;
6325 
6326 	wait_rc = pqi_device_wait_for_pending_io(ctrl_info, device, scmd->device->lun, timeout_msecs);
6327 	if (wait_rc && reset_rc == 0)
6328 		reset_rc = wait_rc;
6329 
6330 	return reset_rc == 0 ? SUCCESS : FAILED;
6331 }
6332 
6333 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6334 {
6335 	int rc;
6336 	struct pqi_scsi_dev *device;
6337 
6338 	device = scmd->device->hostdata;
6339 	pqi_ctrl_block_requests(ctrl_info);
6340 	pqi_ctrl_wait_until_quiesced(ctrl_info);
6341 	pqi_fail_io_queued_for_device(ctrl_info, device);
6342 	rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
6343 	if (rc)
6344 		rc = FAILED;
6345 	else
6346 		rc = pqi_lun_reset_with_retries(ctrl_info, scmd);
6347 	pqi_ctrl_unblock_requests(ctrl_info);
6348 
6349 	return rc;
6350 }
6351 
6352 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
6353 {
6354 	int rc;
6355 	struct Scsi_Host *shost;
6356 	struct pqi_ctrl_info *ctrl_info;
6357 	struct pqi_scsi_dev *device;
6358 
6359 	shost = scmd->device->host;
6360 	ctrl_info = shost_to_hba(shost);
6361 	device = scmd->device->hostdata;
6362 
6363 	mutex_lock(&ctrl_info->lun_reset_mutex);
6364 
6365 	dev_err(&ctrl_info->pci_dev->dev,
6366 		"resetting scsi %d:%d:%d:%d due to cmd 0x%02x\n",
6367 		shost->host_no,
6368 		device->bus, device->target, (u32)scmd->device->lun,
6369 		scmd->cmd_len > 0 ? scmd->cmnd[0] : 0xff);
6370 
6371 	pqi_check_ctrl_health(ctrl_info);
6372 	if (pqi_ctrl_offline(ctrl_info))
6373 		rc = FAILED;
6374 	else
6375 		rc = pqi_device_reset(ctrl_info, scmd);
6376 
6377 	dev_err(&ctrl_info->pci_dev->dev,
6378 		"reset of scsi %d:%d:%d:%d: %s\n",
6379 		shost->host_no, device->bus, device->target, (u32)scmd->device->lun,
6380 		rc == SUCCESS ? "SUCCESS" : "FAILED");
6381 
6382 	mutex_unlock(&ctrl_info->lun_reset_mutex);
6383 
6384 	return rc;
6385 }
6386 
6387 static int pqi_slave_alloc(struct scsi_device *sdev)
6388 {
6389 	struct pqi_scsi_dev *device;
6390 	unsigned long flags;
6391 	struct pqi_ctrl_info *ctrl_info;
6392 	struct scsi_target *starget;
6393 	struct sas_rphy *rphy;
6394 
6395 	ctrl_info = shost_to_hba(sdev->host);
6396 
6397 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6398 
6399 	if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
6400 		starget = scsi_target(sdev);
6401 		rphy = target_to_rphy(starget);
6402 		device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
6403 		if (device) {
6404 			if (device->target_lun_valid) {
6405 				device->ignore_device = true;
6406 			} else {
6407 				device->target = sdev_id(sdev);
6408 				device->lun = sdev->lun;
6409 				device->target_lun_valid = true;
6410 			}
6411 		}
6412 	} else {
6413 		device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
6414 			sdev_id(sdev), sdev->lun);
6415 	}
6416 
6417 	if (device) {
6418 		sdev->hostdata = device;
6419 		device->sdev = sdev;
6420 		if (device->queue_depth) {
6421 			device->advertised_queue_depth = device->queue_depth;
6422 			scsi_change_queue_depth(sdev,
6423 				device->advertised_queue_depth);
6424 		}
6425 		if (pqi_is_logical_device(device)) {
6426 			pqi_disable_write_same(sdev);
6427 		} else {
6428 			sdev->allow_restart = 1;
6429 			if (device->device_type == SA_DEVICE_TYPE_NVME)
6430 				pqi_disable_write_same(sdev);
6431 		}
6432 	}
6433 
6434 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6435 
6436 	return 0;
6437 }
6438 
6439 static void pqi_map_queues(struct Scsi_Host *shost)
6440 {
6441 	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6442 
6443 	blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
6444 			      ctrl_info->pci_dev, 0);
6445 }
6446 
6447 static inline bool pqi_is_tape_changer_device(struct pqi_scsi_dev *device)
6448 {
6449 	return device->devtype == TYPE_TAPE || device->devtype == TYPE_MEDIUM_CHANGER;
6450 }
6451 
6452 static int pqi_slave_configure(struct scsi_device *sdev)
6453 {
6454 	int rc = 0;
6455 	struct pqi_scsi_dev *device;
6456 
6457 	device = sdev->hostdata;
6458 	device->devtype = sdev->type;
6459 
6460 	if (pqi_is_tape_changer_device(device) && device->ignore_device) {
6461 		rc = -ENXIO;
6462 		device->ignore_device = false;
6463 	}
6464 
6465 	return rc;
6466 }
6467 
6468 static void pqi_slave_destroy(struct scsi_device *sdev)
6469 {
6470 	struct pqi_ctrl_info *ctrl_info;
6471 	struct pqi_scsi_dev *device;
6472 	int mutex_acquired;
6473 	unsigned long flags;
6474 
6475 	ctrl_info = shost_to_hba(sdev->host);
6476 
6477 	mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
6478 	if (!mutex_acquired)
6479 		return;
6480 
6481 	device = sdev->hostdata;
6482 	if (!device) {
6483 		mutex_unlock(&ctrl_info->scan_mutex);
6484 		return;
6485 	}
6486 
6487 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6488 	list_del(&device->scsi_device_list_entry);
6489 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6490 
6491 	mutex_unlock(&ctrl_info->scan_mutex);
6492 
6493 	pqi_dev_info(ctrl_info, "removed", device);
6494 	pqi_free_device(device);
6495 }
6496 
6497 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6498 {
6499 	struct pci_dev *pci_dev;
6500 	u32 subsystem_vendor;
6501 	u32 subsystem_device;
6502 	cciss_pci_info_struct pciinfo;
6503 
6504 	if (!arg)
6505 		return -EINVAL;
6506 
6507 	pci_dev = ctrl_info->pci_dev;
6508 
6509 	pciinfo.domain = pci_domain_nr(pci_dev->bus);
6510 	pciinfo.bus = pci_dev->bus->number;
6511 	pciinfo.dev_fn = pci_dev->devfn;
6512 	subsystem_vendor = pci_dev->subsystem_vendor;
6513 	subsystem_device = pci_dev->subsystem_device;
6514 	pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor;
6515 
6516 	if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
6517 		return -EFAULT;
6518 
6519 	return 0;
6520 }
6521 
6522 static int pqi_getdrivver_ioctl(void __user *arg)
6523 {
6524 	u32 version;
6525 
6526 	if (!arg)
6527 		return -EINVAL;
6528 
6529 	version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
6530 		(DRIVER_RELEASE << 16) | DRIVER_REVISION;
6531 
6532 	if (copy_to_user(arg, &version, sizeof(version)))
6533 		return -EFAULT;
6534 
6535 	return 0;
6536 }
6537 
6538 struct ciss_error_info {
6539 	u8	scsi_status;
6540 	int	command_status;
6541 	size_t	sense_data_length;
6542 };
6543 
6544 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
6545 	struct ciss_error_info *ciss_error_info)
6546 {
6547 	int ciss_cmd_status;
6548 	size_t sense_data_length;
6549 
6550 	switch (pqi_error_info->data_out_result) {
6551 	case PQI_DATA_IN_OUT_GOOD:
6552 		ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
6553 		break;
6554 	case PQI_DATA_IN_OUT_UNDERFLOW:
6555 		ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
6556 		break;
6557 	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
6558 		ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
6559 		break;
6560 	case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
6561 	case PQI_DATA_IN_OUT_BUFFER_ERROR:
6562 	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
6563 	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
6564 	case PQI_DATA_IN_OUT_ERROR:
6565 		ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
6566 		break;
6567 	case PQI_DATA_IN_OUT_HARDWARE_ERROR:
6568 	case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
6569 	case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
6570 	case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
6571 	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
6572 	case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
6573 	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
6574 	case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
6575 	case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
6576 	case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
6577 		ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
6578 		break;
6579 	case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
6580 		ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
6581 		break;
6582 	case PQI_DATA_IN_OUT_ABORTED:
6583 		ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
6584 		break;
6585 	case PQI_DATA_IN_OUT_TIMEOUT:
6586 		ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
6587 		break;
6588 	default:
6589 		ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
6590 		break;
6591 	}
6592 
6593 	sense_data_length =
6594 		get_unaligned_le16(&pqi_error_info->sense_data_length);
6595 	if (sense_data_length == 0)
6596 		sense_data_length =
6597 		get_unaligned_le16(&pqi_error_info->response_data_length);
6598 	if (sense_data_length)
6599 		if (sense_data_length > sizeof(pqi_error_info->data))
6600 			sense_data_length = sizeof(pqi_error_info->data);
6601 
6602 	ciss_error_info->scsi_status = pqi_error_info->status;
6603 	ciss_error_info->command_status = ciss_cmd_status;
6604 	ciss_error_info->sense_data_length = sense_data_length;
6605 }
6606 
6607 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6608 {
6609 	int rc;
6610 	char *kernel_buffer = NULL;
6611 	u16 iu_length;
6612 	size_t sense_data_length;
6613 	IOCTL_Command_struct iocommand;
6614 	struct pqi_raid_path_request request;
6615 	struct pqi_raid_error_info pqi_error_info;
6616 	struct ciss_error_info ciss_error_info;
6617 
6618 	if (pqi_ctrl_offline(ctrl_info))
6619 		return -ENXIO;
6620 	if (pqi_ofa_in_progress(ctrl_info) && pqi_ctrl_blocked(ctrl_info))
6621 		return -EBUSY;
6622 	if (!arg)
6623 		return -EINVAL;
6624 	if (!capable(CAP_SYS_RAWIO))
6625 		return -EPERM;
6626 	if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
6627 		return -EFAULT;
6628 	if (iocommand.buf_size < 1 &&
6629 		iocommand.Request.Type.Direction != XFER_NONE)
6630 		return -EINVAL;
6631 	if (iocommand.Request.CDBLen > sizeof(request.cdb))
6632 		return -EINVAL;
6633 	if (iocommand.Request.Type.Type != TYPE_CMD)
6634 		return -EINVAL;
6635 
6636 	switch (iocommand.Request.Type.Direction) {
6637 	case XFER_NONE:
6638 	case XFER_WRITE:
6639 	case XFER_READ:
6640 	case XFER_READ | XFER_WRITE:
6641 		break;
6642 	default:
6643 		return -EINVAL;
6644 	}
6645 
6646 	if (iocommand.buf_size > 0) {
6647 		kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
6648 		if (!kernel_buffer)
6649 			return -ENOMEM;
6650 		if (iocommand.Request.Type.Direction & XFER_WRITE) {
6651 			if (copy_from_user(kernel_buffer, iocommand.buf,
6652 				iocommand.buf_size)) {
6653 				rc = -EFAULT;
6654 				goto out;
6655 			}
6656 		} else {
6657 			memset(kernel_buffer, 0, iocommand.buf_size);
6658 		}
6659 	}
6660 
6661 	memset(&request, 0, sizeof(request));
6662 
6663 	request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
6664 	iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
6665 		PQI_REQUEST_HEADER_LENGTH;
6666 	memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
6667 		sizeof(request.lun_number));
6668 	memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
6669 	request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
6670 
6671 	switch (iocommand.Request.Type.Direction) {
6672 	case XFER_NONE:
6673 		request.data_direction = SOP_NO_DIRECTION_FLAG;
6674 		break;
6675 	case XFER_WRITE:
6676 		request.data_direction = SOP_WRITE_FLAG;
6677 		break;
6678 	case XFER_READ:
6679 		request.data_direction = SOP_READ_FLAG;
6680 		break;
6681 	case XFER_READ | XFER_WRITE:
6682 		request.data_direction = SOP_BIDIRECTIONAL;
6683 		break;
6684 	}
6685 
6686 	request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
6687 
6688 	if (iocommand.buf_size > 0) {
6689 		put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
6690 
6691 		rc = pqi_map_single(ctrl_info->pci_dev,
6692 			&request.sg_descriptors[0], kernel_buffer,
6693 			iocommand.buf_size, DMA_BIDIRECTIONAL);
6694 		if (rc)
6695 			goto out;
6696 
6697 		iu_length += sizeof(request.sg_descriptors[0]);
6698 	}
6699 
6700 	put_unaligned_le16(iu_length, &request.header.iu_length);
6701 
6702 	if (ctrl_info->raid_iu_timeout_supported)
6703 		put_unaligned_le32(iocommand.Request.Timeout, &request.timeout);
6704 
6705 	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6706 		PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info);
6707 
6708 	if (iocommand.buf_size > 0)
6709 		pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6710 			DMA_BIDIRECTIONAL);
6711 
6712 	memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6713 
6714 	if (rc == 0) {
6715 		pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6716 		iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6717 		iocommand.error_info.CommandStatus =
6718 			ciss_error_info.command_status;
6719 		sense_data_length = ciss_error_info.sense_data_length;
6720 		if (sense_data_length) {
6721 			if (sense_data_length >
6722 				sizeof(iocommand.error_info.SenseInfo))
6723 				sense_data_length =
6724 					sizeof(iocommand.error_info.SenseInfo);
6725 			memcpy(iocommand.error_info.SenseInfo,
6726 				pqi_error_info.data, sense_data_length);
6727 			iocommand.error_info.SenseLen = sense_data_length;
6728 		}
6729 	}
6730 
6731 	if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6732 		rc = -EFAULT;
6733 		goto out;
6734 	}
6735 
6736 	if (rc == 0 && iocommand.buf_size > 0 &&
6737 		(iocommand.Request.Type.Direction & XFER_READ)) {
6738 		if (copy_to_user(iocommand.buf, kernel_buffer,
6739 			iocommand.buf_size)) {
6740 			rc = -EFAULT;
6741 		}
6742 	}
6743 
6744 out:
6745 	kfree(kernel_buffer);
6746 
6747 	return rc;
6748 }
6749 
6750 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6751 		     void __user *arg)
6752 {
6753 	int rc;
6754 	struct pqi_ctrl_info *ctrl_info;
6755 
6756 	ctrl_info = shost_to_hba(sdev->host);
6757 
6758 	switch (cmd) {
6759 	case CCISS_DEREGDISK:
6760 	case CCISS_REGNEWDISK:
6761 	case CCISS_REGNEWD:
6762 		rc = pqi_scan_scsi_devices(ctrl_info);
6763 		break;
6764 	case CCISS_GETPCIINFO:
6765 		rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6766 		break;
6767 	case CCISS_GETDRIVVER:
6768 		rc = pqi_getdrivver_ioctl(arg);
6769 		break;
6770 	case CCISS_PASSTHRU:
6771 		rc = pqi_passthru_ioctl(ctrl_info, arg);
6772 		break;
6773 	default:
6774 		rc = -EINVAL;
6775 		break;
6776 	}
6777 
6778 	return rc;
6779 }
6780 
6781 static ssize_t pqi_firmware_version_show(struct device *dev,
6782 	struct device_attribute *attr, char *buffer)
6783 {
6784 	struct Scsi_Host *shost;
6785 	struct pqi_ctrl_info *ctrl_info;
6786 
6787 	shost = class_to_shost(dev);
6788 	ctrl_info = shost_to_hba(shost);
6789 
6790 	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
6791 }
6792 
6793 static ssize_t pqi_driver_version_show(struct device *dev,
6794 	struct device_attribute *attr, char *buffer)
6795 {
6796 	return scnprintf(buffer, PAGE_SIZE, "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
6797 }
6798 
6799 static ssize_t pqi_serial_number_show(struct device *dev,
6800 	struct device_attribute *attr, char *buffer)
6801 {
6802 	struct Scsi_Host *shost;
6803 	struct pqi_ctrl_info *ctrl_info;
6804 
6805 	shost = class_to_shost(dev);
6806 	ctrl_info = shost_to_hba(shost);
6807 
6808 	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
6809 }
6810 
6811 static ssize_t pqi_model_show(struct device *dev,
6812 	struct device_attribute *attr, char *buffer)
6813 {
6814 	struct Scsi_Host *shost;
6815 	struct pqi_ctrl_info *ctrl_info;
6816 
6817 	shost = class_to_shost(dev);
6818 	ctrl_info = shost_to_hba(shost);
6819 
6820 	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
6821 }
6822 
6823 static ssize_t pqi_vendor_show(struct device *dev,
6824 	struct device_attribute *attr, char *buffer)
6825 {
6826 	struct Scsi_Host *shost;
6827 	struct pqi_ctrl_info *ctrl_info;
6828 
6829 	shost = class_to_shost(dev);
6830 	ctrl_info = shost_to_hba(shost);
6831 
6832 	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
6833 }
6834 
6835 static ssize_t pqi_host_rescan_store(struct device *dev,
6836 	struct device_attribute *attr, const char *buffer, size_t count)
6837 {
6838 	struct Scsi_Host *shost = class_to_shost(dev);
6839 
6840 	pqi_scan_start(shost);
6841 
6842 	return count;
6843 }
6844 
6845 static ssize_t pqi_lockup_action_show(struct device *dev,
6846 	struct device_attribute *attr, char *buffer)
6847 {
6848 	int count = 0;
6849 	unsigned int i;
6850 
6851 	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6852 		if (pqi_lockup_actions[i].action == pqi_lockup_action)
6853 			count += scnprintf(buffer + count, PAGE_SIZE - count,
6854 				"[%s] ", pqi_lockup_actions[i].name);
6855 		else
6856 			count += scnprintf(buffer + count, PAGE_SIZE - count,
6857 				"%s ", pqi_lockup_actions[i].name);
6858 	}
6859 
6860 	count += scnprintf(buffer + count, PAGE_SIZE - count, "\n");
6861 
6862 	return count;
6863 }
6864 
6865 static ssize_t pqi_lockup_action_store(struct device *dev,
6866 	struct device_attribute *attr, const char *buffer, size_t count)
6867 {
6868 	unsigned int i;
6869 	char *action_name;
6870 	char action_name_buffer[32];
6871 
6872 	strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6873 	action_name = strstrip(action_name_buffer);
6874 
6875 	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6876 		if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6877 			pqi_lockup_action = pqi_lockup_actions[i].action;
6878 			return count;
6879 		}
6880 	}
6881 
6882 	return -EINVAL;
6883 }
6884 
6885 static ssize_t pqi_host_enable_stream_detection_show(struct device *dev,
6886 	struct device_attribute *attr, char *buffer)
6887 {
6888 	struct Scsi_Host *shost = class_to_shost(dev);
6889 	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6890 
6891 	return scnprintf(buffer, 10, "%x\n",
6892 			ctrl_info->enable_stream_detection);
6893 }
6894 
6895 static ssize_t pqi_host_enable_stream_detection_store(struct device *dev,
6896 	struct device_attribute *attr, const char *buffer, size_t count)
6897 {
6898 	struct Scsi_Host *shost = class_to_shost(dev);
6899 	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6900 	u8 set_stream_detection = 0;
6901 
6902 	if (kstrtou8(buffer, 0, &set_stream_detection))
6903 		return -EINVAL;
6904 
6905 	if (set_stream_detection > 0)
6906 		set_stream_detection = 1;
6907 
6908 	ctrl_info->enable_stream_detection = set_stream_detection;
6909 
6910 	return count;
6911 }
6912 
6913 static ssize_t pqi_host_enable_r5_writes_show(struct device *dev,
6914 	struct device_attribute *attr, char *buffer)
6915 {
6916 	struct Scsi_Host *shost = class_to_shost(dev);
6917 	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6918 
6919 	return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r5_writes);
6920 }
6921 
6922 static ssize_t pqi_host_enable_r5_writes_store(struct device *dev,
6923 	struct device_attribute *attr, const char *buffer, size_t count)
6924 {
6925 	struct Scsi_Host *shost = class_to_shost(dev);
6926 	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6927 	u8 set_r5_writes = 0;
6928 
6929 	if (kstrtou8(buffer, 0, &set_r5_writes))
6930 		return -EINVAL;
6931 
6932 	if (set_r5_writes > 0)
6933 		set_r5_writes = 1;
6934 
6935 	ctrl_info->enable_r5_writes = set_r5_writes;
6936 
6937 	return count;
6938 }
6939 
6940 static ssize_t pqi_host_enable_r6_writes_show(struct device *dev,
6941 	struct device_attribute *attr, char *buffer)
6942 {
6943 	struct Scsi_Host *shost = class_to_shost(dev);
6944 	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6945 
6946 	return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r6_writes);
6947 }
6948 
6949 static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
6950 	struct device_attribute *attr, const char *buffer, size_t count)
6951 {
6952 	struct Scsi_Host *shost = class_to_shost(dev);
6953 	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6954 	u8 set_r6_writes = 0;
6955 
6956 	if (kstrtou8(buffer, 0, &set_r6_writes))
6957 		return -EINVAL;
6958 
6959 	if (set_r6_writes > 0)
6960 		set_r6_writes = 1;
6961 
6962 	ctrl_info->enable_r6_writes = set_r6_writes;
6963 
6964 	return count;
6965 }
6966 
6967 static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
6968 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
6969 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
6970 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
6971 static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
6972 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
6973 static DEVICE_ATTR(lockup_action, 0644, pqi_lockup_action_show,
6974 	pqi_lockup_action_store);
6975 static DEVICE_ATTR(enable_stream_detection, 0644,
6976 	pqi_host_enable_stream_detection_show,
6977 	pqi_host_enable_stream_detection_store);
6978 static DEVICE_ATTR(enable_r5_writes, 0644,
6979 	pqi_host_enable_r5_writes_show, pqi_host_enable_r5_writes_store);
6980 static DEVICE_ATTR(enable_r6_writes, 0644,
6981 	pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
6982 
6983 static struct attribute *pqi_shost_attrs[] = {
6984 	&dev_attr_driver_version.attr,
6985 	&dev_attr_firmware_version.attr,
6986 	&dev_attr_model.attr,
6987 	&dev_attr_serial_number.attr,
6988 	&dev_attr_vendor.attr,
6989 	&dev_attr_rescan.attr,
6990 	&dev_attr_lockup_action.attr,
6991 	&dev_attr_enable_stream_detection.attr,
6992 	&dev_attr_enable_r5_writes.attr,
6993 	&dev_attr_enable_r6_writes.attr,
6994 	NULL
6995 };
6996 
6997 ATTRIBUTE_GROUPS(pqi_shost);
6998 
6999 static ssize_t pqi_unique_id_show(struct device *dev,
7000 	struct device_attribute *attr, char *buffer)
7001 {
7002 	struct pqi_ctrl_info *ctrl_info;
7003 	struct scsi_device *sdev;
7004 	struct pqi_scsi_dev *device;
7005 	unsigned long flags;
7006 	u8 unique_id[16];
7007 
7008 	sdev = to_scsi_device(dev);
7009 	ctrl_info = shost_to_hba(sdev->host);
7010 
7011 	if (pqi_ctrl_offline(ctrl_info))
7012 		return -ENODEV;
7013 
7014 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7015 
7016 	device = sdev->hostdata;
7017 	if (!device) {
7018 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7019 		return -ENODEV;
7020 	}
7021 
7022 	if (device->is_physical_device)
7023 		memcpy(unique_id, device->wwid, sizeof(device->wwid));
7024 	else
7025 		memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
7026 
7027 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7028 
7029 	return scnprintf(buffer, PAGE_SIZE,
7030 		"%02X%02X%02X%02X%02X%02X%02X%02X"
7031 		"%02X%02X%02X%02X%02X%02X%02X%02X\n",
7032 		unique_id[0], unique_id[1], unique_id[2], unique_id[3],
7033 		unique_id[4], unique_id[5], unique_id[6], unique_id[7],
7034 		unique_id[8], unique_id[9], unique_id[10], unique_id[11],
7035 		unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
7036 }
7037 
7038 static ssize_t pqi_lunid_show(struct device *dev,
7039 	struct device_attribute *attr, char *buffer)
7040 {
7041 	struct pqi_ctrl_info *ctrl_info;
7042 	struct scsi_device *sdev;
7043 	struct pqi_scsi_dev *device;
7044 	unsigned long flags;
7045 	u8 lunid[8];
7046 
7047 	sdev = to_scsi_device(dev);
7048 	ctrl_info = shost_to_hba(sdev->host);
7049 
7050 	if (pqi_ctrl_offline(ctrl_info))
7051 		return -ENODEV;
7052 
7053 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7054 
7055 	device = sdev->hostdata;
7056 	if (!device) {
7057 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7058 		return -ENODEV;
7059 	}
7060 
7061 	memcpy(lunid, device->scsi3addr, sizeof(lunid));
7062 
7063 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7064 
7065 	return scnprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
7066 }
7067 
7068 #define MAX_PATHS	8
7069 
7070 static ssize_t pqi_path_info_show(struct device *dev,
7071 	struct device_attribute *attr, char *buf)
7072 {
7073 	struct pqi_ctrl_info *ctrl_info;
7074 	struct scsi_device *sdev;
7075 	struct pqi_scsi_dev *device;
7076 	unsigned long flags;
7077 	int i;
7078 	int output_len = 0;
7079 	u8 box;
7080 	u8 bay;
7081 	u8 path_map_index;
7082 	char *active;
7083 	u8 phys_connector[2];
7084 
7085 	sdev = to_scsi_device(dev);
7086 	ctrl_info = shost_to_hba(sdev->host);
7087 
7088 	if (pqi_ctrl_offline(ctrl_info))
7089 		return -ENODEV;
7090 
7091 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7092 
7093 	device = sdev->hostdata;
7094 	if (!device) {
7095 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7096 		return -ENODEV;
7097 	}
7098 
7099 	bay = device->bay;
7100 	for (i = 0; i < MAX_PATHS; i++) {
7101 		path_map_index = 1 << i;
7102 		if (i == device->active_path_index)
7103 			active = "Active";
7104 		else if (device->path_map & path_map_index)
7105 			active = "Inactive";
7106 		else
7107 			continue;
7108 
7109 		output_len += scnprintf(buf + output_len,
7110 					PAGE_SIZE - output_len,
7111 					"[%d:%d:%d:%d] %20.20s ",
7112 					ctrl_info->scsi_host->host_no,
7113 					device->bus, device->target,
7114 					device->lun,
7115 					scsi_device_type(device->devtype));
7116 
7117 		if (device->devtype == TYPE_RAID ||
7118 			pqi_is_logical_device(device))
7119 			goto end_buffer;
7120 
7121 		memcpy(&phys_connector, &device->phys_connector[i],
7122 			sizeof(phys_connector));
7123 		if (phys_connector[0] < '0')
7124 			phys_connector[0] = '0';
7125 		if (phys_connector[1] < '0')
7126 			phys_connector[1] = '0';
7127 
7128 		output_len += scnprintf(buf + output_len,
7129 					PAGE_SIZE - output_len,
7130 					"PORT: %.2s ", phys_connector);
7131 
7132 		box = device->box[i];
7133 		if (box != 0 && box != 0xFF)
7134 			output_len += scnprintf(buf + output_len,
7135 						PAGE_SIZE - output_len,
7136 						"BOX: %hhu ", box);
7137 
7138 		if ((device->devtype == TYPE_DISK ||
7139 			device->devtype == TYPE_ZBC) &&
7140 			pqi_expose_device(device))
7141 			output_len += scnprintf(buf + output_len,
7142 						PAGE_SIZE - output_len,
7143 						"BAY: %hhu ", bay);
7144 
7145 end_buffer:
7146 		output_len += scnprintf(buf + output_len,
7147 					PAGE_SIZE - output_len,
7148 					"%s\n", active);
7149 	}
7150 
7151 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7152 
7153 	return output_len;
7154 }
7155 
7156 static ssize_t pqi_sas_address_show(struct device *dev,
7157 	struct device_attribute *attr, char *buffer)
7158 {
7159 	struct pqi_ctrl_info *ctrl_info;
7160 	struct scsi_device *sdev;
7161 	struct pqi_scsi_dev *device;
7162 	unsigned long flags;
7163 	u64 sas_address;
7164 
7165 	sdev = to_scsi_device(dev);
7166 	ctrl_info = shost_to_hba(sdev->host);
7167 
7168 	if (pqi_ctrl_offline(ctrl_info))
7169 		return -ENODEV;
7170 
7171 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7172 
7173 	device = sdev->hostdata;
7174 	if (!device) {
7175 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7176 		return -ENODEV;
7177 	}
7178 
7179 	sas_address = device->sas_address;
7180 
7181 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7182 
7183 	return scnprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
7184 }
7185 
7186 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
7187 	struct device_attribute *attr, char *buffer)
7188 {
7189 	struct pqi_ctrl_info *ctrl_info;
7190 	struct scsi_device *sdev;
7191 	struct pqi_scsi_dev *device;
7192 	unsigned long flags;
7193 
7194 	sdev = to_scsi_device(dev);
7195 	ctrl_info = shost_to_hba(sdev->host);
7196 
7197 	if (pqi_ctrl_offline(ctrl_info))
7198 		return -ENODEV;
7199 
7200 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7201 
7202 	device = sdev->hostdata;
7203 	if (!device) {
7204 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7205 		return -ENODEV;
7206 	}
7207 
7208 	buffer[0] = device->raid_bypass_enabled ? '1' : '0';
7209 	buffer[1] = '\n';
7210 	buffer[2] = '\0';
7211 
7212 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7213 
7214 	return 2;
7215 }
7216 
7217 static ssize_t pqi_raid_level_show(struct device *dev,
7218 	struct device_attribute *attr, char *buffer)
7219 {
7220 	struct pqi_ctrl_info *ctrl_info;
7221 	struct scsi_device *sdev;
7222 	struct pqi_scsi_dev *device;
7223 	unsigned long flags;
7224 	char *raid_level;
7225 
7226 	sdev = to_scsi_device(dev);
7227 	ctrl_info = shost_to_hba(sdev->host);
7228 
7229 	if (pqi_ctrl_offline(ctrl_info))
7230 		return -ENODEV;
7231 
7232 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7233 
7234 	device = sdev->hostdata;
7235 	if (!device) {
7236 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7237 		return -ENODEV;
7238 	}
7239 
7240 	if (pqi_is_logical_device(device))
7241 		raid_level = pqi_raid_level_to_string(device->raid_level);
7242 	else
7243 		raid_level = "N/A";
7244 
7245 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7246 
7247 	return scnprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
7248 }
7249 
7250 static ssize_t pqi_raid_bypass_cnt_show(struct device *dev,
7251 	struct device_attribute *attr, char *buffer)
7252 {
7253 	struct pqi_ctrl_info *ctrl_info;
7254 	struct scsi_device *sdev;
7255 	struct pqi_scsi_dev *device;
7256 	unsigned long flags;
7257 	int raid_bypass_cnt;
7258 
7259 	sdev = to_scsi_device(dev);
7260 	ctrl_info = shost_to_hba(sdev->host);
7261 
7262 	if (pqi_ctrl_offline(ctrl_info))
7263 		return -ENODEV;
7264 
7265 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7266 
7267 	device = sdev->hostdata;
7268 	if (!device) {
7269 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7270 		return -ENODEV;
7271 	}
7272 
7273 	raid_bypass_cnt = atomic_read(&device->raid_bypass_cnt);
7274 
7275 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7276 
7277 	return scnprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt);
7278 }
7279 
7280 static ssize_t pqi_sas_ncq_prio_enable_show(struct device *dev,
7281 		struct device_attribute *attr, char *buf)
7282 {
7283 	struct pqi_ctrl_info *ctrl_info;
7284 	struct scsi_device *sdev;
7285 	struct pqi_scsi_dev *device;
7286 	unsigned long flags;
7287 	int output_len = 0;
7288 
7289 	sdev = to_scsi_device(dev);
7290 	ctrl_info = shost_to_hba(sdev->host);
7291 
7292 	if (pqi_ctrl_offline(ctrl_info))
7293 		return -ENODEV;
7294 
7295 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7296 
7297 	device = sdev->hostdata;
7298 	if (!device) {
7299 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7300 		return -ENODEV;
7301 	}
7302 
7303 	output_len = snprintf(buf, PAGE_SIZE, "%d\n",
7304 				device->ncq_prio_enable);
7305 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7306 
7307 	return output_len;
7308 }
7309 
7310 static ssize_t pqi_sas_ncq_prio_enable_store(struct device *dev,
7311 			struct device_attribute *attr,
7312 			const char *buf, size_t count)
7313 {
7314 	struct pqi_ctrl_info *ctrl_info;
7315 	struct scsi_device *sdev;
7316 	struct pqi_scsi_dev *device;
7317 	unsigned long flags;
7318 	u8 ncq_prio_enable = 0;
7319 
7320 	if (kstrtou8(buf, 0, &ncq_prio_enable))
7321 		return -EINVAL;
7322 
7323 	sdev = to_scsi_device(dev);
7324 	ctrl_info = shost_to_hba(sdev->host);
7325 
7326 	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7327 
7328 	device = sdev->hostdata;
7329 
7330 	if (!device) {
7331 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7332 		return -ENODEV;
7333 	}
7334 
7335 	if (!device->ncq_prio_support ||
7336 		!device->is_physical_device) {
7337 		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7338 		return -EINVAL;
7339 	}
7340 
7341 	device->ncq_prio_enable = ncq_prio_enable;
7342 
7343 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7344 
7345 	return  strlen(buf);
7346 }
7347 
7348 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
7349 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
7350 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
7351 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
7352 static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL);
7353 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
7354 static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL);
7355 static DEVICE_ATTR(sas_ncq_prio_enable, 0644,
7356 		pqi_sas_ncq_prio_enable_show, pqi_sas_ncq_prio_enable_store);
7357 
7358 static struct attribute *pqi_sdev_attrs[] = {
7359 	&dev_attr_lunid.attr,
7360 	&dev_attr_unique_id.attr,
7361 	&dev_attr_path_info.attr,
7362 	&dev_attr_sas_address.attr,
7363 	&dev_attr_ssd_smart_path_enabled.attr,
7364 	&dev_attr_raid_level.attr,
7365 	&dev_attr_raid_bypass_cnt.attr,
7366 	&dev_attr_sas_ncq_prio_enable.attr,
7367 	NULL
7368 };
7369 
7370 ATTRIBUTE_GROUPS(pqi_sdev);
7371 
7372 static struct scsi_host_template pqi_driver_template = {
7373 	.module = THIS_MODULE,
7374 	.name = DRIVER_NAME_SHORT,
7375 	.proc_name = DRIVER_NAME_SHORT,
7376 	.queuecommand = pqi_scsi_queue_command,
7377 	.scan_start = pqi_scan_start,
7378 	.scan_finished = pqi_scan_finished,
7379 	.this_id = -1,
7380 	.eh_device_reset_handler = pqi_eh_device_reset_handler,
7381 	.ioctl = pqi_ioctl,
7382 	.slave_alloc = pqi_slave_alloc,
7383 	.slave_configure = pqi_slave_configure,
7384 	.slave_destroy = pqi_slave_destroy,
7385 	.map_queues = pqi_map_queues,
7386 	.sdev_groups = pqi_sdev_groups,
7387 	.shost_groups = pqi_shost_groups,
7388 	.cmd_size = sizeof(struct pqi_cmd_priv),
7389 };
7390 
7391 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
7392 {
7393 	int rc;
7394 	struct Scsi_Host *shost;
7395 
7396 	shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
7397 	if (!shost) {
7398 		dev_err(&ctrl_info->pci_dev->dev, "scsi_host_alloc failed\n");
7399 		return -ENOMEM;
7400 	}
7401 
7402 	shost->io_port = 0;
7403 	shost->n_io_port = 0;
7404 	shost->this_id = -1;
7405 	shost->max_channel = PQI_MAX_BUS;
7406 	shost->max_cmd_len = MAX_COMMAND_SIZE;
7407 	shost->max_lun = PQI_MAX_LUNS_PER_DEVICE;
7408 	shost->max_lun = ~0;
7409 	shost->max_id = ~0;
7410 	shost->max_sectors = ctrl_info->max_sectors;
7411 	shost->can_queue = ctrl_info->scsi_ml_can_queue;
7412 	shost->cmd_per_lun = shost->can_queue;
7413 	shost->sg_tablesize = ctrl_info->sg_tablesize;
7414 	shost->transportt = pqi_sas_transport_template;
7415 	shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
7416 	shost->unique_id = shost->irq;
7417 	shost->nr_hw_queues = ctrl_info->num_queue_groups;
7418 	shost->host_tagset = 1;
7419 	shost->hostdata[0] = (unsigned long)ctrl_info;
7420 
7421 	rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
7422 	if (rc) {
7423 		dev_err(&ctrl_info->pci_dev->dev, "scsi_add_host failed\n");
7424 		goto free_host;
7425 	}
7426 
7427 	rc = pqi_add_sas_host(shost, ctrl_info);
7428 	if (rc) {
7429 		dev_err(&ctrl_info->pci_dev->dev, "add SAS host failed\n");
7430 		goto remove_host;
7431 	}
7432 
7433 	ctrl_info->scsi_host = shost;
7434 
7435 	return 0;
7436 
7437 remove_host:
7438 	scsi_remove_host(shost);
7439 free_host:
7440 	scsi_host_put(shost);
7441 
7442 	return rc;
7443 }
7444 
7445 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
7446 {
7447 	struct Scsi_Host *shost;
7448 
7449 	pqi_delete_sas_host(ctrl_info);
7450 
7451 	shost = ctrl_info->scsi_host;
7452 	if (!shost)
7453 		return;
7454 
7455 	scsi_remove_host(shost);
7456 	scsi_host_put(shost);
7457 }
7458 
7459 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
7460 {
7461 	int rc = 0;
7462 	struct pqi_device_registers __iomem *pqi_registers;
7463 	unsigned long timeout;
7464 	unsigned int timeout_msecs;
7465 	union pqi_reset_register reset_reg;
7466 
7467 	pqi_registers = ctrl_info->pqi_registers;
7468 	timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
7469 	timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
7470 
7471 	while (1) {
7472 		msleep(PQI_RESET_POLL_INTERVAL_MSECS);
7473 		reset_reg.all_bits = readl(&pqi_registers->device_reset);
7474 		if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
7475 			break;
7476 		if (!sis_is_firmware_running(ctrl_info)) {
7477 			rc = -ENXIO;
7478 			break;
7479 		}
7480 		if (time_after(jiffies, timeout)) {
7481 			rc = -ETIMEDOUT;
7482 			break;
7483 		}
7484 	}
7485 
7486 	return rc;
7487 }
7488 
7489 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
7490 {
7491 	int rc;
7492 	union pqi_reset_register reset_reg;
7493 
7494 	if (ctrl_info->pqi_reset_quiesce_supported) {
7495 		rc = sis_pqi_reset_quiesce(ctrl_info);
7496 		if (rc) {
7497 			dev_err(&ctrl_info->pci_dev->dev,
7498 				"PQI reset failed during quiesce with error %d\n", rc);
7499 			return rc;
7500 		}
7501 	}
7502 
7503 	reset_reg.all_bits = 0;
7504 	reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
7505 	reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
7506 
7507 	writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
7508 
7509 	rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
7510 	if (rc)
7511 		dev_err(&ctrl_info->pci_dev->dev,
7512 			"PQI reset failed with error %d\n", rc);
7513 
7514 	return rc;
7515 }
7516 
7517 static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
7518 {
7519 	int rc;
7520 	struct bmic_sense_subsystem_info *sense_info;
7521 
7522 	sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
7523 	if (!sense_info)
7524 		return -ENOMEM;
7525 
7526 	rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
7527 	if (rc)
7528 		goto out;
7529 
7530 	memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
7531 		sizeof(sense_info->ctrl_serial_number));
7532 	ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
7533 
7534 out:
7535 	kfree(sense_info);
7536 
7537 	return rc;
7538 }
7539 
7540 static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
7541 {
7542 	int rc;
7543 	struct bmic_identify_controller *identify;
7544 
7545 	identify = kmalloc(sizeof(*identify), GFP_KERNEL);
7546 	if (!identify)
7547 		return -ENOMEM;
7548 
7549 	rc = pqi_identify_controller(ctrl_info, identify);
7550 	if (rc)
7551 		goto out;
7552 
7553 	if (get_unaligned_le32(&identify->extra_controller_flags) &
7554 		BMIC_IDENTIFY_EXTRA_FLAGS_LONG_FW_VERSION_SUPPORTED) {
7555 		memcpy(ctrl_info->firmware_version,
7556 			identify->firmware_version_long,
7557 			sizeof(identify->firmware_version_long));
7558 	} else {
7559 		memcpy(ctrl_info->firmware_version,
7560 			identify->firmware_version_short,
7561 			sizeof(identify->firmware_version_short));
7562 		ctrl_info->firmware_version
7563 			[sizeof(identify->firmware_version_short)] = '\0';
7564 		snprintf(ctrl_info->firmware_version +
7565 			strlen(ctrl_info->firmware_version),
7566 			sizeof(ctrl_info->firmware_version) -
7567 			sizeof(identify->firmware_version_short),
7568 			"-%u",
7569 			get_unaligned_le16(&identify->firmware_build_number));
7570 	}
7571 
7572 	memcpy(ctrl_info->model, identify->product_id,
7573 		sizeof(identify->product_id));
7574 	ctrl_info->model[sizeof(identify->product_id)] = '\0';
7575 
7576 	memcpy(ctrl_info->vendor, identify->vendor_id,
7577 		sizeof(identify->vendor_id));
7578 	ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
7579 
7580 	dev_info(&ctrl_info->pci_dev->dev,
7581 		"Firmware version: %s\n", ctrl_info->firmware_version);
7582 
7583 out:
7584 	kfree(identify);
7585 
7586 	return rc;
7587 }
7588 
7589 struct pqi_config_table_section_info {
7590 	struct pqi_ctrl_info *ctrl_info;
7591 	void		*section;
7592 	u32		section_offset;
7593 	void __iomem	*section_iomem_addr;
7594 };
7595 
7596 static inline bool pqi_is_firmware_feature_supported(
7597 	struct pqi_config_table_firmware_features *firmware_features,
7598 	unsigned int bit_position)
7599 {
7600 	unsigned int byte_index;
7601 
7602 	byte_index = bit_position / BITS_PER_BYTE;
7603 
7604 	if (byte_index >= le16_to_cpu(firmware_features->num_elements))
7605 		return false;
7606 
7607 	return firmware_features->features_supported[byte_index] &
7608 		(1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7609 }
7610 
7611 static inline bool pqi_is_firmware_feature_enabled(
7612 	struct pqi_config_table_firmware_features *firmware_features,
7613 	void __iomem *firmware_features_iomem_addr,
7614 	unsigned int bit_position)
7615 {
7616 	unsigned int byte_index;
7617 	u8 __iomem *features_enabled_iomem_addr;
7618 
7619 	byte_index = (bit_position / BITS_PER_BYTE) +
7620 		(le16_to_cpu(firmware_features->num_elements) * 2);
7621 
7622 	features_enabled_iomem_addr = firmware_features_iomem_addr +
7623 		offsetof(struct pqi_config_table_firmware_features,
7624 			features_supported) + byte_index;
7625 
7626 	return *((__force u8 *)features_enabled_iomem_addr) &
7627 		(1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7628 }
7629 
7630 static inline void pqi_request_firmware_feature(
7631 	struct pqi_config_table_firmware_features *firmware_features,
7632 	unsigned int bit_position)
7633 {
7634 	unsigned int byte_index;
7635 
7636 	byte_index = (bit_position / BITS_PER_BYTE) +
7637 		le16_to_cpu(firmware_features->num_elements);
7638 
7639 	firmware_features->features_supported[byte_index] |=
7640 		(1 << (bit_position % BITS_PER_BYTE));
7641 }
7642 
7643 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
7644 	u16 first_section, u16 last_section)
7645 {
7646 	struct pqi_vendor_general_request request;
7647 
7648 	memset(&request, 0, sizeof(request));
7649 
7650 	request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7651 	put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7652 		&request.header.iu_length);
7653 	put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
7654 		&request.function_code);
7655 	put_unaligned_le16(first_section,
7656 		&request.data.config_table_update.first_section);
7657 	put_unaligned_le16(last_section,
7658 		&request.data.config_table_update.last_section);
7659 
7660 	return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
7661 }
7662 
7663 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
7664 	struct pqi_config_table_firmware_features *firmware_features,
7665 	void __iomem *firmware_features_iomem_addr)
7666 {
7667 	void *features_requested;
7668 	void __iomem *features_requested_iomem_addr;
7669 	void __iomem *host_max_known_feature_iomem_addr;
7670 
7671 	features_requested = firmware_features->features_supported +
7672 		le16_to_cpu(firmware_features->num_elements);
7673 
7674 	features_requested_iomem_addr = firmware_features_iomem_addr +
7675 		(features_requested - (void *)firmware_features);
7676 
7677 	memcpy_toio(features_requested_iomem_addr, features_requested,
7678 		le16_to_cpu(firmware_features->num_elements));
7679 
7680 	if (pqi_is_firmware_feature_supported(firmware_features,
7681 		PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE)) {
7682 		host_max_known_feature_iomem_addr =
7683 			features_requested_iomem_addr +
7684 			(le16_to_cpu(firmware_features->num_elements) * 2) +
7685 			sizeof(__le16);
7686 		writew(PQI_FIRMWARE_FEATURE_MAXIMUM,
7687 			host_max_known_feature_iomem_addr);
7688 	}
7689 
7690 	return pqi_config_table_update(ctrl_info,
7691 		PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
7692 		PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
7693 }
7694 
7695 struct pqi_firmware_feature {
7696 	char		*feature_name;
7697 	unsigned int	feature_bit;
7698 	bool		supported;
7699 	bool		enabled;
7700 	void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
7701 		struct pqi_firmware_feature *firmware_feature);
7702 };
7703 
7704 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
7705 	struct pqi_firmware_feature *firmware_feature)
7706 {
7707 	if (!firmware_feature->supported) {
7708 		dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
7709 			firmware_feature->feature_name);
7710 		return;
7711 	}
7712 
7713 	if (firmware_feature->enabled) {
7714 		dev_info(&ctrl_info->pci_dev->dev,
7715 			"%s enabled\n", firmware_feature->feature_name);
7716 		return;
7717 	}
7718 
7719 	dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
7720 		firmware_feature->feature_name);
7721 }
7722 
7723 static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
7724 	struct pqi_firmware_feature *firmware_feature)
7725 {
7726 	switch (firmware_feature->feature_bit) {
7727 	case PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS:
7728 		ctrl_info->enable_r1_writes = firmware_feature->enabled;
7729 		break;
7730 	case PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS:
7731 		ctrl_info->enable_r5_writes = firmware_feature->enabled;
7732 		break;
7733 	case PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS:
7734 		ctrl_info->enable_r6_writes = firmware_feature->enabled;
7735 		break;
7736 	case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE:
7737 		ctrl_info->soft_reset_handshake_supported =
7738 			firmware_feature->enabled &&
7739 			pqi_read_soft_reset_status(ctrl_info);
7740 		break;
7741 	case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT:
7742 		ctrl_info->raid_iu_timeout_supported = firmware_feature->enabled;
7743 		break;
7744 	case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT:
7745 		ctrl_info->tmf_iu_timeout_supported = firmware_feature->enabled;
7746 		break;
7747 	case PQI_FIRMWARE_FEATURE_FW_TRIAGE:
7748 		ctrl_info->firmware_triage_supported = firmware_feature->enabled;
7749 		pqi_save_fw_triage_setting(ctrl_info, firmware_feature->enabled);
7750 		break;
7751 	case PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5:
7752 		ctrl_info->rpl_extended_format_4_5_supported = firmware_feature->enabled;
7753 		break;
7754 	case PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT:
7755 		ctrl_info->multi_lun_device_supported = firmware_feature->enabled;
7756 		break;
7757 	}
7758 
7759 	pqi_firmware_feature_status(ctrl_info, firmware_feature);
7760 }
7761 
7762 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
7763 	struct pqi_firmware_feature *firmware_feature)
7764 {
7765 	if (firmware_feature->feature_status)
7766 		firmware_feature->feature_status(ctrl_info, firmware_feature);
7767 }
7768 
7769 static DEFINE_MUTEX(pqi_firmware_features_mutex);
7770 
7771 static struct pqi_firmware_feature pqi_firmware_features[] = {
7772 	{
7773 		.feature_name = "Online Firmware Activation",
7774 		.feature_bit = PQI_FIRMWARE_FEATURE_OFA,
7775 		.feature_status = pqi_firmware_feature_status,
7776 	},
7777 	{
7778 		.feature_name = "Serial Management Protocol",
7779 		.feature_bit = PQI_FIRMWARE_FEATURE_SMP,
7780 		.feature_status = pqi_firmware_feature_status,
7781 	},
7782 	{
7783 		.feature_name = "Maximum Known Feature",
7784 		.feature_bit = PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE,
7785 		.feature_status = pqi_firmware_feature_status,
7786 	},
7787 	{
7788 		.feature_name = "RAID 0 Read Bypass",
7789 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_READ_BYPASS,
7790 		.feature_status = pqi_firmware_feature_status,
7791 	},
7792 	{
7793 		.feature_name = "RAID 1 Read Bypass",
7794 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_READ_BYPASS,
7795 		.feature_status = pqi_firmware_feature_status,
7796 	},
7797 	{
7798 		.feature_name = "RAID 5 Read Bypass",
7799 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_READ_BYPASS,
7800 		.feature_status = pqi_firmware_feature_status,
7801 	},
7802 	{
7803 		.feature_name = "RAID 6 Read Bypass",
7804 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_READ_BYPASS,
7805 		.feature_status = pqi_firmware_feature_status,
7806 	},
7807 	{
7808 		.feature_name = "RAID 0 Write Bypass",
7809 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_WRITE_BYPASS,
7810 		.feature_status = pqi_firmware_feature_status,
7811 	},
7812 	{
7813 		.feature_name = "RAID 1 Write Bypass",
7814 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS,
7815 		.feature_status = pqi_ctrl_update_feature_flags,
7816 	},
7817 	{
7818 		.feature_name = "RAID 5 Write Bypass",
7819 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS,
7820 		.feature_status = pqi_ctrl_update_feature_flags,
7821 	},
7822 	{
7823 		.feature_name = "RAID 6 Write Bypass",
7824 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS,
7825 		.feature_status = pqi_ctrl_update_feature_flags,
7826 	},
7827 	{
7828 		.feature_name = "New Soft Reset Handshake",
7829 		.feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
7830 		.feature_status = pqi_ctrl_update_feature_flags,
7831 	},
7832 	{
7833 		.feature_name = "RAID IU Timeout",
7834 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT,
7835 		.feature_status = pqi_ctrl_update_feature_flags,
7836 	},
7837 	{
7838 		.feature_name = "TMF IU Timeout",
7839 		.feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT,
7840 		.feature_status = pqi_ctrl_update_feature_flags,
7841 	},
7842 	{
7843 		.feature_name = "RAID Bypass on encrypted logical volumes on NVMe",
7844 		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_BYPASS_ON_ENCRYPTED_NVME,
7845 		.feature_status = pqi_firmware_feature_status,
7846 	},
7847 	{
7848 		.feature_name = "Firmware Triage",
7849 		.feature_bit = PQI_FIRMWARE_FEATURE_FW_TRIAGE,
7850 		.feature_status = pqi_ctrl_update_feature_flags,
7851 	},
7852 	{
7853 		.feature_name = "RPL Extended Formats 4 and 5",
7854 		.feature_bit = PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5,
7855 		.feature_status = pqi_ctrl_update_feature_flags,
7856 	},
7857 	{
7858 		.feature_name = "Multi-LUN Target",
7859 		.feature_bit = PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT,
7860 		.feature_status = pqi_ctrl_update_feature_flags,
7861 	},
7862 };
7863 
7864 static void pqi_process_firmware_features(
7865 	struct pqi_config_table_section_info *section_info)
7866 {
7867 	int rc;
7868 	struct pqi_ctrl_info *ctrl_info;
7869 	struct pqi_config_table_firmware_features *firmware_features;
7870 	void __iomem *firmware_features_iomem_addr;
7871 	unsigned int i;
7872 	unsigned int num_features_supported;
7873 
7874 	ctrl_info = section_info->ctrl_info;
7875 	firmware_features = section_info->section;
7876 	firmware_features_iomem_addr = section_info->section_iomem_addr;
7877 
7878 	for (i = 0, num_features_supported = 0;
7879 		i < ARRAY_SIZE(pqi_firmware_features); i++) {
7880 		if (pqi_is_firmware_feature_supported(firmware_features,
7881 			pqi_firmware_features[i].feature_bit)) {
7882 			pqi_firmware_features[i].supported = true;
7883 			num_features_supported++;
7884 		} else {
7885 			pqi_firmware_feature_update(ctrl_info,
7886 				&pqi_firmware_features[i]);
7887 		}
7888 	}
7889 
7890 	if (num_features_supported == 0)
7891 		return;
7892 
7893 	for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7894 		if (!pqi_firmware_features[i].supported)
7895 			continue;
7896 		pqi_request_firmware_feature(firmware_features,
7897 			pqi_firmware_features[i].feature_bit);
7898 	}
7899 
7900 	rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
7901 		firmware_features_iomem_addr);
7902 	if (rc) {
7903 		dev_err(&ctrl_info->pci_dev->dev,
7904 			"failed to enable firmware features in PQI configuration table\n");
7905 		for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7906 			if (!pqi_firmware_features[i].supported)
7907 				continue;
7908 			pqi_firmware_feature_update(ctrl_info,
7909 				&pqi_firmware_features[i]);
7910 		}
7911 		return;
7912 	}
7913 
7914 	for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7915 		if (!pqi_firmware_features[i].supported)
7916 			continue;
7917 		if (pqi_is_firmware_feature_enabled(firmware_features,
7918 			firmware_features_iomem_addr,
7919 			pqi_firmware_features[i].feature_bit)) {
7920 				pqi_firmware_features[i].enabled = true;
7921 		}
7922 		pqi_firmware_feature_update(ctrl_info,
7923 			&pqi_firmware_features[i]);
7924 	}
7925 }
7926 
7927 static void pqi_init_firmware_features(void)
7928 {
7929 	unsigned int i;
7930 
7931 	for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7932 		pqi_firmware_features[i].supported = false;
7933 		pqi_firmware_features[i].enabled = false;
7934 	}
7935 }
7936 
7937 static void pqi_process_firmware_features_section(
7938 	struct pqi_config_table_section_info *section_info)
7939 {
7940 	mutex_lock(&pqi_firmware_features_mutex);
7941 	pqi_init_firmware_features();
7942 	pqi_process_firmware_features(section_info);
7943 	mutex_unlock(&pqi_firmware_features_mutex);
7944 }
7945 
7946 /*
7947  * Reset all controller settings that can be initialized during the processing
7948  * of the PQI Configuration Table.
7949  */
7950 
7951 static void pqi_ctrl_reset_config(struct pqi_ctrl_info *ctrl_info)
7952 {
7953 	ctrl_info->heartbeat_counter = NULL;
7954 	ctrl_info->soft_reset_status = NULL;
7955 	ctrl_info->soft_reset_handshake_supported = false;
7956 	ctrl_info->enable_r1_writes = false;
7957 	ctrl_info->enable_r5_writes = false;
7958 	ctrl_info->enable_r6_writes = false;
7959 	ctrl_info->raid_iu_timeout_supported = false;
7960 	ctrl_info->tmf_iu_timeout_supported = false;
7961 	ctrl_info->firmware_triage_supported = false;
7962 	ctrl_info->rpl_extended_format_4_5_supported = false;
7963 	ctrl_info->multi_lun_device_supported = false;
7964 }
7965 
7966 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
7967 {
7968 	u32 table_length;
7969 	u32 section_offset;
7970 	bool firmware_feature_section_present;
7971 	void __iomem *table_iomem_addr;
7972 	struct pqi_config_table *config_table;
7973 	struct pqi_config_table_section_header *section;
7974 	struct pqi_config_table_section_info section_info;
7975 	struct pqi_config_table_section_info feature_section_info;
7976 
7977 	table_length = ctrl_info->config_table_length;
7978 	if (table_length == 0)
7979 		return 0;
7980 
7981 	config_table = kmalloc(table_length, GFP_KERNEL);
7982 	if (!config_table) {
7983 		dev_err(&ctrl_info->pci_dev->dev,
7984 			"failed to allocate memory for PQI configuration table\n");
7985 		return -ENOMEM;
7986 	}
7987 
7988 	/*
7989 	 * Copy the config table contents from I/O memory space into the
7990 	 * temporary buffer.
7991 	 */
7992 	table_iomem_addr = ctrl_info->iomem_base + ctrl_info->config_table_offset;
7993 	memcpy_fromio(config_table, table_iomem_addr, table_length);
7994 
7995 	firmware_feature_section_present = false;
7996 	section_info.ctrl_info = ctrl_info;
7997 	section_offset = get_unaligned_le32(&config_table->first_section_offset);
7998 
7999 	while (section_offset) {
8000 		section = (void *)config_table + section_offset;
8001 
8002 		section_info.section = section;
8003 		section_info.section_offset = section_offset;
8004 		section_info.section_iomem_addr = table_iomem_addr + section_offset;
8005 
8006 		switch (get_unaligned_le16(&section->section_id)) {
8007 		case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
8008 			firmware_feature_section_present = true;
8009 			feature_section_info = section_info;
8010 			break;
8011 		case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
8012 			if (pqi_disable_heartbeat)
8013 				dev_warn(&ctrl_info->pci_dev->dev,
8014 				"heartbeat disabled by module parameter\n");
8015 			else
8016 				ctrl_info->heartbeat_counter =
8017 					table_iomem_addr +
8018 					section_offset +
8019 					offsetof(struct pqi_config_table_heartbeat,
8020 						heartbeat_counter);
8021 			break;
8022 		case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
8023 			ctrl_info->soft_reset_status =
8024 				table_iomem_addr +
8025 				section_offset +
8026 				offsetof(struct pqi_config_table_soft_reset,
8027 					soft_reset_status);
8028 			break;
8029 		}
8030 
8031 		section_offset = get_unaligned_le16(&section->next_section_offset);
8032 	}
8033 
8034 	/*
8035 	 * We process the firmware feature section after all other sections
8036 	 * have been processed so that the feature bit callbacks can take
8037 	 * into account the settings configured by other sections.
8038 	 */
8039 	if (firmware_feature_section_present)
8040 		pqi_process_firmware_features_section(&feature_section_info);
8041 
8042 	kfree(config_table);
8043 
8044 	return 0;
8045 }
8046 
8047 /* Switches the controller from PQI mode back into SIS mode. */
8048 
8049 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
8050 {
8051 	int rc;
8052 
8053 	pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
8054 	rc = pqi_reset(ctrl_info);
8055 	if (rc)
8056 		return rc;
8057 	rc = sis_reenable_sis_mode(ctrl_info);
8058 	if (rc) {
8059 		dev_err(&ctrl_info->pci_dev->dev,
8060 			"re-enabling SIS mode failed with error %d\n", rc);
8061 		return rc;
8062 	}
8063 	pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
8064 
8065 	return 0;
8066 }
8067 
8068 /*
8069  * If the controller isn't already in SIS mode, this function forces it into
8070  * SIS mode.
8071  */
8072 
8073 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
8074 {
8075 	if (!sis_is_firmware_running(ctrl_info))
8076 		return -ENXIO;
8077 
8078 	if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
8079 		return 0;
8080 
8081 	if (sis_is_kernel_up(ctrl_info)) {
8082 		pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
8083 		return 0;
8084 	}
8085 
8086 	return pqi_revert_to_sis_mode(ctrl_info);
8087 }
8088 
8089 static void pqi_perform_lockup_action(void)
8090 {
8091 	switch (pqi_lockup_action) {
8092 	case PANIC:
8093 		panic("FATAL: Smart Family Controller lockup detected");
8094 		break;
8095 	case REBOOT:
8096 		emergency_restart();
8097 		break;
8098 	case NONE:
8099 	default:
8100 		break;
8101 	}
8102 }
8103 
8104 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
8105 {
8106 	int rc;
8107 	u32 product_id;
8108 
8109 	if (reset_devices) {
8110 		if (pqi_is_fw_triage_supported(ctrl_info)) {
8111 			rc = sis_wait_for_fw_triage_completion(ctrl_info);
8112 			if (rc)
8113 				return rc;
8114 		}
8115 		sis_soft_reset(ctrl_info);
8116 		ssleep(PQI_POST_RESET_DELAY_SECS);
8117 	} else {
8118 		rc = pqi_force_sis_mode(ctrl_info);
8119 		if (rc)
8120 			return rc;
8121 	}
8122 
8123 	/*
8124 	 * Wait until the controller is ready to start accepting SIS
8125 	 * commands.
8126 	 */
8127 	rc = sis_wait_for_ctrl_ready(ctrl_info);
8128 	if (rc) {
8129 		if (reset_devices) {
8130 			dev_err(&ctrl_info->pci_dev->dev,
8131 				"kdump init failed with error %d\n", rc);
8132 			pqi_lockup_action = REBOOT;
8133 			pqi_perform_lockup_action();
8134 		}
8135 		return rc;
8136 	}
8137 
8138 	/*
8139 	 * Get the controller properties.  This allows us to determine
8140 	 * whether or not it supports PQI mode.
8141 	 */
8142 	rc = sis_get_ctrl_properties(ctrl_info);
8143 	if (rc) {
8144 		dev_err(&ctrl_info->pci_dev->dev,
8145 			"error obtaining controller properties\n");
8146 		return rc;
8147 	}
8148 
8149 	rc = sis_get_pqi_capabilities(ctrl_info);
8150 	if (rc) {
8151 		dev_err(&ctrl_info->pci_dev->dev,
8152 			"error obtaining controller capabilities\n");
8153 		return rc;
8154 	}
8155 
8156 	product_id = sis_get_product_id(ctrl_info);
8157 	ctrl_info->product_id = (u8)product_id;
8158 	ctrl_info->product_revision = (u8)(product_id >> 8);
8159 
8160 	if (reset_devices) {
8161 		if (ctrl_info->max_outstanding_requests >
8162 			PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
8163 				ctrl_info->max_outstanding_requests =
8164 					PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
8165 	} else {
8166 		if (ctrl_info->max_outstanding_requests >
8167 			PQI_MAX_OUTSTANDING_REQUESTS)
8168 				ctrl_info->max_outstanding_requests =
8169 					PQI_MAX_OUTSTANDING_REQUESTS;
8170 	}
8171 
8172 	pqi_calculate_io_resources(ctrl_info);
8173 
8174 	rc = pqi_alloc_error_buffer(ctrl_info);
8175 	if (rc) {
8176 		dev_err(&ctrl_info->pci_dev->dev,
8177 			"failed to allocate PQI error buffer\n");
8178 		return rc;
8179 	}
8180 
8181 	/*
8182 	 * If the function we are about to call succeeds, the
8183 	 * controller will transition from legacy SIS mode
8184 	 * into PQI mode.
8185 	 */
8186 	rc = sis_init_base_struct_addr(ctrl_info);
8187 	if (rc) {
8188 		dev_err(&ctrl_info->pci_dev->dev,
8189 			"error initializing PQI mode\n");
8190 		return rc;
8191 	}
8192 
8193 	/* Wait for the controller to complete the SIS -> PQI transition. */
8194 	rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8195 	if (rc) {
8196 		dev_err(&ctrl_info->pci_dev->dev,
8197 			"transition to PQI mode failed\n");
8198 		return rc;
8199 	}
8200 
8201 	/* From here on, we are running in PQI mode. */
8202 	ctrl_info->pqi_mode_enabled = true;
8203 	pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8204 
8205 	rc = pqi_alloc_admin_queues(ctrl_info);
8206 	if (rc) {
8207 		dev_err(&ctrl_info->pci_dev->dev,
8208 			"failed to allocate admin queues\n");
8209 		return rc;
8210 	}
8211 
8212 	rc = pqi_create_admin_queues(ctrl_info);
8213 	if (rc) {
8214 		dev_err(&ctrl_info->pci_dev->dev,
8215 			"error creating admin queues\n");
8216 		return rc;
8217 	}
8218 
8219 	rc = pqi_report_device_capability(ctrl_info);
8220 	if (rc) {
8221 		dev_err(&ctrl_info->pci_dev->dev,
8222 			"obtaining device capability failed\n");
8223 		return rc;
8224 	}
8225 
8226 	rc = pqi_validate_device_capability(ctrl_info);
8227 	if (rc)
8228 		return rc;
8229 
8230 	pqi_calculate_queue_resources(ctrl_info);
8231 
8232 	rc = pqi_enable_msix_interrupts(ctrl_info);
8233 	if (rc)
8234 		return rc;
8235 
8236 	if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
8237 		ctrl_info->max_msix_vectors =
8238 			ctrl_info->num_msix_vectors_enabled;
8239 		pqi_calculate_queue_resources(ctrl_info);
8240 	}
8241 
8242 	rc = pqi_alloc_io_resources(ctrl_info);
8243 	if (rc)
8244 		return rc;
8245 
8246 	rc = pqi_alloc_operational_queues(ctrl_info);
8247 	if (rc) {
8248 		dev_err(&ctrl_info->pci_dev->dev,
8249 			"failed to allocate operational queues\n");
8250 		return rc;
8251 	}
8252 
8253 	pqi_init_operational_queues(ctrl_info);
8254 
8255 	rc = pqi_create_queues(ctrl_info);
8256 	if (rc)
8257 		return rc;
8258 
8259 	rc = pqi_request_irqs(ctrl_info);
8260 	if (rc)
8261 		return rc;
8262 
8263 	pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8264 
8265 	ctrl_info->controller_online = true;
8266 
8267 	rc = pqi_process_config_table(ctrl_info);
8268 	if (rc)
8269 		return rc;
8270 
8271 	pqi_start_heartbeat_timer(ctrl_info);
8272 
8273 	if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8274 		rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8275 		if (rc) { /* Supported features not returned correctly. */
8276 			dev_err(&ctrl_info->pci_dev->dev,
8277 				"error obtaining advanced RAID bypass configuration\n");
8278 			return rc;
8279 		}
8280 		ctrl_info->ciss_report_log_flags |=
8281 			CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8282 	}
8283 
8284 	rc = pqi_enable_events(ctrl_info);
8285 	if (rc) {
8286 		dev_err(&ctrl_info->pci_dev->dev,
8287 			"error enabling events\n");
8288 		return rc;
8289 	}
8290 
8291 	/* Register with the SCSI subsystem. */
8292 	rc = pqi_register_scsi(ctrl_info);
8293 	if (rc)
8294 		return rc;
8295 
8296 	rc = pqi_get_ctrl_product_details(ctrl_info);
8297 	if (rc) {
8298 		dev_err(&ctrl_info->pci_dev->dev,
8299 			"error obtaining product details\n");
8300 		return rc;
8301 	}
8302 
8303 	rc = pqi_get_ctrl_serial_number(ctrl_info);
8304 	if (rc) {
8305 		dev_err(&ctrl_info->pci_dev->dev,
8306 			"error obtaining ctrl serial number\n");
8307 		return rc;
8308 	}
8309 
8310 	rc = pqi_set_diag_rescan(ctrl_info);
8311 	if (rc) {
8312 		dev_err(&ctrl_info->pci_dev->dev,
8313 			"error enabling multi-lun rescan\n");
8314 		return rc;
8315 	}
8316 
8317 	rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8318 	if (rc) {
8319 		dev_err(&ctrl_info->pci_dev->dev,
8320 			"error updating host wellness\n");
8321 		return rc;
8322 	}
8323 
8324 	pqi_schedule_update_time_worker(ctrl_info);
8325 
8326 	pqi_scan_scsi_devices(ctrl_info);
8327 
8328 	return 0;
8329 }
8330 
8331 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
8332 {
8333 	unsigned int i;
8334 	struct pqi_admin_queues *admin_queues;
8335 	struct pqi_event_queue *event_queue;
8336 
8337 	admin_queues = &ctrl_info->admin_queues;
8338 	admin_queues->iq_pi_copy = 0;
8339 	admin_queues->oq_ci_copy = 0;
8340 	writel(0, admin_queues->oq_pi);
8341 
8342 	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
8343 		ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
8344 		ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
8345 		ctrl_info->queue_groups[i].oq_ci_copy = 0;
8346 
8347 		writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
8348 		writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
8349 		writel(0, ctrl_info->queue_groups[i].oq_pi);
8350 	}
8351 
8352 	event_queue = &ctrl_info->event_queue;
8353 	writel(0, event_queue->oq_pi);
8354 	event_queue->oq_ci_copy = 0;
8355 }
8356 
8357 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
8358 {
8359 	int rc;
8360 
8361 	rc = pqi_force_sis_mode(ctrl_info);
8362 	if (rc)
8363 		return rc;
8364 
8365 	/*
8366 	 * Wait until the controller is ready to start accepting SIS
8367 	 * commands.
8368 	 */
8369 	rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
8370 	if (rc)
8371 		return rc;
8372 
8373 	/*
8374 	 * Get the controller properties.  This allows us to determine
8375 	 * whether or not it supports PQI mode.
8376 	 */
8377 	rc = sis_get_ctrl_properties(ctrl_info);
8378 	if (rc) {
8379 		dev_err(&ctrl_info->pci_dev->dev,
8380 			"error obtaining controller properties\n");
8381 		return rc;
8382 	}
8383 
8384 	rc = sis_get_pqi_capabilities(ctrl_info);
8385 	if (rc) {
8386 		dev_err(&ctrl_info->pci_dev->dev,
8387 			"error obtaining controller capabilities\n");
8388 		return rc;
8389 	}
8390 
8391 	/*
8392 	 * If the function we are about to call succeeds, the
8393 	 * controller will transition from legacy SIS mode
8394 	 * into PQI mode.
8395 	 */
8396 	rc = sis_init_base_struct_addr(ctrl_info);
8397 	if (rc) {
8398 		dev_err(&ctrl_info->pci_dev->dev,
8399 			"error initializing PQI mode\n");
8400 		return rc;
8401 	}
8402 
8403 	/* Wait for the controller to complete the SIS -> PQI transition. */
8404 	rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8405 	if (rc) {
8406 		dev_err(&ctrl_info->pci_dev->dev,
8407 			"transition to PQI mode failed\n");
8408 		return rc;
8409 	}
8410 
8411 	/* From here on, we are running in PQI mode. */
8412 	ctrl_info->pqi_mode_enabled = true;
8413 	pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8414 
8415 	pqi_reinit_queues(ctrl_info);
8416 
8417 	rc = pqi_create_admin_queues(ctrl_info);
8418 	if (rc) {
8419 		dev_err(&ctrl_info->pci_dev->dev,
8420 			"error creating admin queues\n");
8421 		return rc;
8422 	}
8423 
8424 	rc = pqi_create_queues(ctrl_info);
8425 	if (rc)
8426 		return rc;
8427 
8428 	pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8429 
8430 	ctrl_info->controller_online = true;
8431 	pqi_ctrl_unblock_requests(ctrl_info);
8432 
8433 	pqi_ctrl_reset_config(ctrl_info);
8434 
8435 	rc = pqi_process_config_table(ctrl_info);
8436 	if (rc)
8437 		return rc;
8438 
8439 	pqi_start_heartbeat_timer(ctrl_info);
8440 
8441 	if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8442 		rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8443 		if (rc) {
8444 			dev_err(&ctrl_info->pci_dev->dev,
8445 				"error obtaining advanced RAID bypass configuration\n");
8446 			return rc;
8447 		}
8448 		ctrl_info->ciss_report_log_flags |=
8449 			CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8450 	}
8451 
8452 	rc = pqi_enable_events(ctrl_info);
8453 	if (rc) {
8454 		dev_err(&ctrl_info->pci_dev->dev,
8455 			"error enabling events\n");
8456 		return rc;
8457 	}
8458 
8459 	rc = pqi_get_ctrl_product_details(ctrl_info);
8460 	if (rc) {
8461 		dev_err(&ctrl_info->pci_dev->dev,
8462 			"error obtaining product details\n");
8463 		return rc;
8464 	}
8465 
8466 	rc = pqi_set_diag_rescan(ctrl_info);
8467 	if (rc) {
8468 		dev_err(&ctrl_info->pci_dev->dev,
8469 			"error enabling multi-lun rescan\n");
8470 		return rc;
8471 	}
8472 
8473 	rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8474 	if (rc) {
8475 		dev_err(&ctrl_info->pci_dev->dev,
8476 			"error updating host wellness\n");
8477 		return rc;
8478 	}
8479 
8480 	if (pqi_ofa_in_progress(ctrl_info))
8481 		pqi_ctrl_unblock_scan(ctrl_info);
8482 
8483 	pqi_scan_scsi_devices(ctrl_info);
8484 
8485 	return 0;
8486 }
8487 
8488 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev, u16 timeout)
8489 {
8490 	int rc;
8491 
8492 	rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
8493 		PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
8494 
8495 	return pcibios_err_to_errno(rc);
8496 }
8497 
8498 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
8499 {
8500 	int rc;
8501 	u64 mask;
8502 
8503 	rc = pci_enable_device(ctrl_info->pci_dev);
8504 	if (rc) {
8505 		dev_err(&ctrl_info->pci_dev->dev,
8506 			"failed to enable PCI device\n");
8507 		return rc;
8508 	}
8509 
8510 	if (sizeof(dma_addr_t) > 4)
8511 		mask = DMA_BIT_MASK(64);
8512 	else
8513 		mask = DMA_BIT_MASK(32);
8514 
8515 	rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
8516 	if (rc) {
8517 		dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
8518 		goto disable_device;
8519 	}
8520 
8521 	rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
8522 	if (rc) {
8523 		dev_err(&ctrl_info->pci_dev->dev,
8524 			"failed to obtain PCI resources\n");
8525 		goto disable_device;
8526 	}
8527 
8528 	ctrl_info->iomem_base = ioremap(pci_resource_start(
8529 		ctrl_info->pci_dev, 0),
8530 		sizeof(struct pqi_ctrl_registers));
8531 	if (!ctrl_info->iomem_base) {
8532 		dev_err(&ctrl_info->pci_dev->dev,
8533 			"failed to map memory for controller registers\n");
8534 		rc = -ENOMEM;
8535 		goto release_regions;
8536 	}
8537 
8538 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS		0x6
8539 
8540 	/* Increase the PCIe completion timeout. */
8541 	rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
8542 		PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
8543 	if (rc) {
8544 		dev_err(&ctrl_info->pci_dev->dev,
8545 			"failed to set PCIe completion timeout\n");
8546 		goto release_regions;
8547 	}
8548 
8549 	/* Enable bus mastering. */
8550 	pci_set_master(ctrl_info->pci_dev);
8551 
8552 	ctrl_info->registers = ctrl_info->iomem_base;
8553 	ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
8554 
8555 	pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
8556 
8557 	return 0;
8558 
8559 release_regions:
8560 	pci_release_regions(ctrl_info->pci_dev);
8561 disable_device:
8562 	pci_disable_device(ctrl_info->pci_dev);
8563 
8564 	return rc;
8565 }
8566 
8567 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
8568 {
8569 	iounmap(ctrl_info->iomem_base);
8570 	pci_release_regions(ctrl_info->pci_dev);
8571 	if (pci_is_enabled(ctrl_info->pci_dev))
8572 		pci_disable_device(ctrl_info->pci_dev);
8573 	pci_set_drvdata(ctrl_info->pci_dev, NULL);
8574 }
8575 
8576 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
8577 {
8578 	struct pqi_ctrl_info *ctrl_info;
8579 
8580 	ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
8581 			GFP_KERNEL, numa_node);
8582 	if (!ctrl_info)
8583 		return NULL;
8584 
8585 	mutex_init(&ctrl_info->scan_mutex);
8586 	mutex_init(&ctrl_info->lun_reset_mutex);
8587 	mutex_init(&ctrl_info->ofa_mutex);
8588 
8589 	INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
8590 	spin_lock_init(&ctrl_info->scsi_device_list_lock);
8591 
8592 	INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
8593 	atomic_set(&ctrl_info->num_interrupts, 0);
8594 
8595 	INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
8596 	INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
8597 
8598 	timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
8599 	INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
8600 
8601 	INIT_WORK(&ctrl_info->ofa_memory_alloc_work, pqi_ofa_memory_alloc_worker);
8602 	INIT_WORK(&ctrl_info->ofa_quiesce_work, pqi_ofa_quiesce_worker);
8603 
8604 	sema_init(&ctrl_info->sync_request_sem,
8605 		PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
8606 	init_waitqueue_head(&ctrl_info->block_requests_wait);
8607 
8608 	ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
8609 	ctrl_info->irq_mode = IRQ_MODE_NONE;
8610 	ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
8611 
8612 	ctrl_info->ciss_report_log_flags = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID;
8613 	ctrl_info->max_transfer_encrypted_sas_sata =
8614 		PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_SAS_SATA;
8615 	ctrl_info->max_transfer_encrypted_nvme =
8616 		PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_NVME;
8617 	ctrl_info->max_write_raid_5_6 = PQI_DEFAULT_MAX_WRITE_RAID_5_6;
8618 	ctrl_info->max_write_raid_1_10_2drive = ~0;
8619 	ctrl_info->max_write_raid_1_10_3drive = ~0;
8620 	ctrl_info->disable_managed_interrupts = pqi_disable_managed_interrupts;
8621 
8622 	return ctrl_info;
8623 }
8624 
8625 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
8626 {
8627 	kfree(ctrl_info);
8628 }
8629 
8630 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
8631 {
8632 	pqi_free_irqs(ctrl_info);
8633 	pqi_disable_msix_interrupts(ctrl_info);
8634 }
8635 
8636 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
8637 {
8638 	pqi_free_interrupts(ctrl_info);
8639 	if (ctrl_info->queue_memory_base)
8640 		dma_free_coherent(&ctrl_info->pci_dev->dev,
8641 			ctrl_info->queue_memory_length,
8642 			ctrl_info->queue_memory_base,
8643 			ctrl_info->queue_memory_base_dma_handle);
8644 	if (ctrl_info->admin_queue_memory_base)
8645 		dma_free_coherent(&ctrl_info->pci_dev->dev,
8646 			ctrl_info->admin_queue_memory_length,
8647 			ctrl_info->admin_queue_memory_base,
8648 			ctrl_info->admin_queue_memory_base_dma_handle);
8649 	pqi_free_all_io_requests(ctrl_info);
8650 	if (ctrl_info->error_buffer)
8651 		dma_free_coherent(&ctrl_info->pci_dev->dev,
8652 			ctrl_info->error_buffer_length,
8653 			ctrl_info->error_buffer,
8654 			ctrl_info->error_buffer_dma_handle);
8655 	if (ctrl_info->iomem_base)
8656 		pqi_cleanup_pci_init(ctrl_info);
8657 	pqi_free_ctrl_info(ctrl_info);
8658 }
8659 
8660 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
8661 {
8662 	ctrl_info->controller_online = false;
8663 	pqi_stop_heartbeat_timer(ctrl_info);
8664 	pqi_ctrl_block_requests(ctrl_info);
8665 	pqi_cancel_rescan_worker(ctrl_info);
8666 	pqi_cancel_update_time_worker(ctrl_info);
8667 	if (ctrl_info->ctrl_removal_state == PQI_CTRL_SURPRISE_REMOVAL) {
8668 		pqi_fail_all_outstanding_requests(ctrl_info);
8669 		ctrl_info->pqi_mode_enabled = false;
8670 	}
8671 	pqi_unregister_scsi(ctrl_info);
8672 	if (ctrl_info->pqi_mode_enabled)
8673 		pqi_revert_to_sis_mode(ctrl_info);
8674 	pqi_free_ctrl_resources(ctrl_info);
8675 }
8676 
8677 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
8678 {
8679 	pqi_ctrl_block_scan(ctrl_info);
8680 	pqi_scsi_block_requests(ctrl_info);
8681 	pqi_ctrl_block_device_reset(ctrl_info);
8682 	pqi_ctrl_block_requests(ctrl_info);
8683 	pqi_ctrl_wait_until_quiesced(ctrl_info);
8684 	pqi_stop_heartbeat_timer(ctrl_info);
8685 }
8686 
8687 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
8688 {
8689 	pqi_start_heartbeat_timer(ctrl_info);
8690 	pqi_ctrl_unblock_requests(ctrl_info);
8691 	pqi_ctrl_unblock_device_reset(ctrl_info);
8692 	pqi_scsi_unblock_requests(ctrl_info);
8693 	pqi_ctrl_unblock_scan(ctrl_info);
8694 }
8695 
8696 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info, u32 total_size, u32 chunk_size)
8697 {
8698 	int i;
8699 	u32 sg_count;
8700 	struct device *dev;
8701 	struct pqi_ofa_memory *ofap;
8702 	struct pqi_sg_descriptor *mem_descriptor;
8703 	dma_addr_t dma_handle;
8704 
8705 	ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8706 
8707 	sg_count = DIV_ROUND_UP(total_size, chunk_size);
8708 	if (sg_count == 0 || sg_count > PQI_OFA_MAX_SG_DESCRIPTORS)
8709 		goto out;
8710 
8711 	ctrl_info->pqi_ofa_chunk_virt_addr = kmalloc_array(sg_count, sizeof(void *), GFP_KERNEL);
8712 	if (!ctrl_info->pqi_ofa_chunk_virt_addr)
8713 		goto out;
8714 
8715 	dev = &ctrl_info->pci_dev->dev;
8716 
8717 	for (i = 0; i < sg_count; i++) {
8718 		ctrl_info->pqi_ofa_chunk_virt_addr[i] =
8719 			dma_alloc_coherent(dev, chunk_size, &dma_handle, GFP_KERNEL);
8720 		if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
8721 			goto out_free_chunks;
8722 		mem_descriptor = &ofap->sg_descriptor[i];
8723 		put_unaligned_le64((u64)dma_handle, &mem_descriptor->address);
8724 		put_unaligned_le32(chunk_size, &mem_descriptor->length);
8725 	}
8726 
8727 	put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
8728 	put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
8729 	put_unaligned_le32(sg_count * chunk_size, &ofap->bytes_allocated);
8730 
8731 	return 0;
8732 
8733 out_free_chunks:
8734 	while (--i >= 0) {
8735 		mem_descriptor = &ofap->sg_descriptor[i];
8736 		dma_free_coherent(dev, chunk_size,
8737 			ctrl_info->pqi_ofa_chunk_virt_addr[i],
8738 			get_unaligned_le64(&mem_descriptor->address));
8739 	}
8740 	kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8741 
8742 out:
8743 	return -ENOMEM;
8744 }
8745 
8746 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
8747 {
8748 	u32 total_size;
8749 	u32 chunk_size;
8750 	u32 min_chunk_size;
8751 
8752 	if (ctrl_info->ofa_bytes_requested == 0)
8753 		return 0;
8754 
8755 	total_size = PAGE_ALIGN(ctrl_info->ofa_bytes_requested);
8756 	min_chunk_size = DIV_ROUND_UP(total_size, PQI_OFA_MAX_SG_DESCRIPTORS);
8757 	min_chunk_size = PAGE_ALIGN(min_chunk_size);
8758 
8759 	for (chunk_size = total_size; chunk_size >= min_chunk_size;) {
8760 		if (pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_size) == 0)
8761 			return 0;
8762 		chunk_size /= 2;
8763 		chunk_size = PAGE_ALIGN(chunk_size);
8764 	}
8765 
8766 	return -ENOMEM;
8767 }
8768 
8769 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info)
8770 {
8771 	struct device *dev;
8772 	struct pqi_ofa_memory *ofap;
8773 
8774 	dev = &ctrl_info->pci_dev->dev;
8775 
8776 	ofap = dma_alloc_coherent(dev, sizeof(*ofap),
8777 		&ctrl_info->pqi_ofa_mem_dma_handle, GFP_KERNEL);
8778 	if (!ofap)
8779 		return;
8780 
8781 	ctrl_info->pqi_ofa_mem_virt_addr = ofap;
8782 
8783 	if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
8784 		dev_err(dev,
8785 			"failed to allocate host buffer for Online Firmware Activation\n");
8786 		dma_free_coherent(dev, sizeof(*ofap), ofap, ctrl_info->pqi_ofa_mem_dma_handle);
8787 		ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8788 		return;
8789 	}
8790 
8791 	put_unaligned_le16(PQI_OFA_VERSION, &ofap->version);
8792 	memcpy(&ofap->signature, PQI_OFA_SIGNATURE, sizeof(ofap->signature));
8793 }
8794 
8795 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
8796 {
8797 	unsigned int i;
8798 	struct device *dev;
8799 	struct pqi_ofa_memory *ofap;
8800 	struct pqi_sg_descriptor *mem_descriptor;
8801 	unsigned int num_memory_descriptors;
8802 
8803 	ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8804 	if (!ofap)
8805 		return;
8806 
8807 	dev = &ctrl_info->pci_dev->dev;
8808 
8809 	if (get_unaligned_le32(&ofap->bytes_allocated) == 0)
8810 		goto out;
8811 
8812 	mem_descriptor = ofap->sg_descriptor;
8813 	num_memory_descriptors =
8814 		get_unaligned_le16(&ofap->num_memory_descriptors);
8815 
8816 	for (i = 0; i < num_memory_descriptors; i++) {
8817 		dma_free_coherent(dev,
8818 			get_unaligned_le32(&mem_descriptor[i].length),
8819 			ctrl_info->pqi_ofa_chunk_virt_addr[i],
8820 			get_unaligned_le64(&mem_descriptor[i].address));
8821 	}
8822 	kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8823 
8824 out:
8825 	dma_free_coherent(dev, sizeof(*ofap), ofap,
8826 		ctrl_info->pqi_ofa_mem_dma_handle);
8827 	ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8828 }
8829 
8830 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
8831 {
8832 	u32 buffer_length;
8833 	struct pqi_vendor_general_request request;
8834 	struct pqi_ofa_memory *ofap;
8835 
8836 	memset(&request, 0, sizeof(request));
8837 
8838 	request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
8839 	put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
8840 		&request.header.iu_length);
8841 	put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
8842 		&request.function_code);
8843 
8844 	ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8845 
8846 	if (ofap) {
8847 		buffer_length = offsetof(struct pqi_ofa_memory, sg_descriptor) +
8848 			get_unaligned_le16(&ofap->num_memory_descriptors) *
8849 			sizeof(struct pqi_sg_descriptor);
8850 
8851 		put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
8852 			&request.data.ofa_memory_allocation.buffer_address);
8853 		put_unaligned_le32(buffer_length,
8854 			&request.data.ofa_memory_allocation.buffer_length);
8855 	}
8856 
8857 	return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
8858 }
8859 
8860 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs)
8861 {
8862 	ssleep(delay_secs);
8863 
8864 	return pqi_ctrl_init_resume(ctrl_info);
8865 }
8866 
8867 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
8868 	.data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
8869 	.status = SAM_STAT_CHECK_CONDITION,
8870 };
8871 
8872 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
8873 {
8874 	unsigned int i;
8875 	struct pqi_io_request *io_request;
8876 	struct scsi_cmnd *scmd;
8877 	struct scsi_device *sdev;
8878 
8879 	for (i = 0; i < ctrl_info->max_io_slots; i++) {
8880 		io_request = &ctrl_info->io_request_pool[i];
8881 		if (atomic_read(&io_request->refcount) == 0)
8882 			continue;
8883 
8884 		scmd = io_request->scmd;
8885 		if (scmd) {
8886 			sdev = scmd->device;
8887 			if (!sdev || !scsi_device_online(sdev)) {
8888 				pqi_free_io_request(io_request);
8889 				continue;
8890 			} else {
8891 				set_host_byte(scmd, DID_NO_CONNECT);
8892 			}
8893 		} else {
8894 			io_request->status = -ENXIO;
8895 			io_request->error_info =
8896 				&pqi_ctrl_offline_raid_error_info;
8897 		}
8898 
8899 		io_request->io_complete_callback(io_request,
8900 			io_request->context);
8901 	}
8902 }
8903 
8904 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
8905 {
8906 	pqi_perform_lockup_action();
8907 	pqi_stop_heartbeat_timer(ctrl_info);
8908 	pqi_free_interrupts(ctrl_info);
8909 	pqi_cancel_rescan_worker(ctrl_info);
8910 	pqi_cancel_update_time_worker(ctrl_info);
8911 	pqi_ctrl_wait_until_quiesced(ctrl_info);
8912 	pqi_fail_all_outstanding_requests(ctrl_info);
8913 	pqi_ctrl_unblock_requests(ctrl_info);
8914 }
8915 
8916 static void pqi_ctrl_offline_worker(struct work_struct *work)
8917 {
8918 	struct pqi_ctrl_info *ctrl_info;
8919 
8920 	ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
8921 	pqi_take_ctrl_offline_deferred(ctrl_info);
8922 }
8923 
8924 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
8925 	enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
8926 {
8927 	if (!ctrl_info->controller_online)
8928 		return;
8929 
8930 	ctrl_info->controller_online = false;
8931 	ctrl_info->pqi_mode_enabled = false;
8932 	pqi_ctrl_block_requests(ctrl_info);
8933 	if (!pqi_disable_ctrl_shutdown)
8934 		sis_shutdown_ctrl(ctrl_info, ctrl_shutdown_reason);
8935 	pci_disable_device(ctrl_info->pci_dev);
8936 	dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
8937 	schedule_work(&ctrl_info->ctrl_offline_work);
8938 }
8939 
8940 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
8941 	const struct pci_device_id *id)
8942 {
8943 	char *ctrl_description;
8944 
8945 	if (id->driver_data)
8946 		ctrl_description = (char *)id->driver_data;
8947 	else
8948 		ctrl_description = "Microchip Smart Family Controller";
8949 
8950 	dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
8951 }
8952 
8953 static int pqi_pci_probe(struct pci_dev *pci_dev,
8954 	const struct pci_device_id *id)
8955 {
8956 	int rc;
8957 	int node;
8958 	struct pqi_ctrl_info *ctrl_info;
8959 
8960 	pqi_print_ctrl_info(pci_dev, id);
8961 
8962 	if (pqi_disable_device_id_wildcards &&
8963 		id->subvendor == PCI_ANY_ID &&
8964 		id->subdevice == PCI_ANY_ID) {
8965 		dev_warn(&pci_dev->dev,
8966 			"controller not probed because device ID wildcards are disabled\n");
8967 		return -ENODEV;
8968 	}
8969 
8970 	if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
8971 		dev_warn(&pci_dev->dev,
8972 			"controller device ID matched using wildcards\n");
8973 
8974 	node = dev_to_node(&pci_dev->dev);
8975 	if (node == NUMA_NO_NODE) {
8976 		node = cpu_to_node(0);
8977 		if (node == NUMA_NO_NODE)
8978 			node = 0;
8979 		set_dev_node(&pci_dev->dev, node);
8980 	}
8981 
8982 	ctrl_info = pqi_alloc_ctrl_info(node);
8983 	if (!ctrl_info) {
8984 		dev_err(&pci_dev->dev,
8985 			"failed to allocate controller info block\n");
8986 		return -ENOMEM;
8987 	}
8988 
8989 	ctrl_info->pci_dev = pci_dev;
8990 
8991 	rc = pqi_pci_init(ctrl_info);
8992 	if (rc)
8993 		goto error;
8994 
8995 	rc = pqi_ctrl_init(ctrl_info);
8996 	if (rc)
8997 		goto error;
8998 
8999 	return 0;
9000 
9001 error:
9002 	pqi_remove_ctrl(ctrl_info);
9003 
9004 	return rc;
9005 }
9006 
9007 static void pqi_pci_remove(struct pci_dev *pci_dev)
9008 {
9009 	struct pqi_ctrl_info *ctrl_info;
9010 	u16 vendor_id;
9011 
9012 	ctrl_info = pci_get_drvdata(pci_dev);
9013 	if (!ctrl_info)
9014 		return;
9015 
9016 	pci_read_config_word(ctrl_info->pci_dev, PCI_SUBSYSTEM_VENDOR_ID, &vendor_id);
9017 	if (vendor_id == 0xffff)
9018 		ctrl_info->ctrl_removal_state = PQI_CTRL_SURPRISE_REMOVAL;
9019 	else
9020 		ctrl_info->ctrl_removal_state = PQI_CTRL_GRACEFUL_REMOVAL;
9021 
9022 	pqi_remove_ctrl(ctrl_info);
9023 }
9024 
9025 static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
9026 {
9027 	unsigned int i;
9028 	struct pqi_io_request *io_request;
9029 	struct scsi_cmnd *scmd;
9030 
9031 	for (i = 0; i < ctrl_info->max_io_slots; i++) {
9032 		io_request = &ctrl_info->io_request_pool[i];
9033 		if (atomic_read(&io_request->refcount) == 0)
9034 			continue;
9035 		scmd = io_request->scmd;
9036 		WARN_ON(scmd != NULL); /* IO command from SML */
9037 		WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
9038 	}
9039 }
9040 
9041 static void pqi_shutdown(struct pci_dev *pci_dev)
9042 {
9043 	int rc;
9044 	struct pqi_ctrl_info *ctrl_info;
9045 	enum bmic_flush_cache_shutdown_event shutdown_event;
9046 
9047 	ctrl_info = pci_get_drvdata(pci_dev);
9048 	if (!ctrl_info) {
9049 		dev_err(&pci_dev->dev,
9050 			"cache could not be flushed\n");
9051 		return;
9052 	}
9053 
9054 	pqi_wait_until_ofa_finished(ctrl_info);
9055 
9056 	pqi_scsi_block_requests(ctrl_info);
9057 	pqi_ctrl_block_device_reset(ctrl_info);
9058 	pqi_ctrl_block_requests(ctrl_info);
9059 	pqi_ctrl_wait_until_quiesced(ctrl_info);
9060 
9061 	if (system_state == SYSTEM_RESTART)
9062 		shutdown_event = RESTART;
9063 	else
9064 		shutdown_event = SHUTDOWN;
9065 
9066 	/*
9067 	 * Write all data in the controller's battery-backed cache to
9068 	 * storage.
9069 	 */
9070 	rc = pqi_flush_cache(ctrl_info, shutdown_event);
9071 	if (rc)
9072 		dev_err(&pci_dev->dev,
9073 			"unable to flush controller cache\n");
9074 
9075 	pqi_crash_if_pending_command(ctrl_info);
9076 	pqi_reset(ctrl_info);
9077 }
9078 
9079 static void pqi_process_lockup_action_param(void)
9080 {
9081 	unsigned int i;
9082 
9083 	if (!pqi_lockup_action_param)
9084 		return;
9085 
9086 	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
9087 		if (strcmp(pqi_lockup_action_param,
9088 			pqi_lockup_actions[i].name) == 0) {
9089 			pqi_lockup_action = pqi_lockup_actions[i].action;
9090 			return;
9091 		}
9092 	}
9093 
9094 	pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
9095 		DRIVER_NAME_SHORT, pqi_lockup_action_param);
9096 }
9097 
9098 #define PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS		30
9099 #define PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS		(30 * 60)
9100 
9101 static void pqi_process_ctrl_ready_timeout_param(void)
9102 {
9103 	if (pqi_ctrl_ready_timeout_secs == 0)
9104 		return;
9105 
9106 	if (pqi_ctrl_ready_timeout_secs < PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS) {
9107 		pr_warn("%s: ctrl_ready_timeout parm of %u second(s) is less than minimum timeout of %d seconds - setting timeout to %d seconds\n",
9108 			DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS);
9109 		pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS;
9110 	} else if (pqi_ctrl_ready_timeout_secs > PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS) {
9111 		pr_warn("%s: ctrl_ready_timeout parm of %u seconds is greater than maximum timeout of %d seconds - setting timeout to %d seconds\n",
9112 			DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS);
9113 		pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS;
9114 	}
9115 
9116 	sis_ctrl_ready_timeout_secs = pqi_ctrl_ready_timeout_secs;
9117 }
9118 
9119 static void pqi_process_module_params(void)
9120 {
9121 	pqi_process_lockup_action_param();
9122 	pqi_process_ctrl_ready_timeout_param();
9123 }
9124 
9125 #if defined(CONFIG_PM)
9126 
9127 static inline enum bmic_flush_cache_shutdown_event pqi_get_flush_cache_shutdown_event(struct pci_dev *pci_dev)
9128 {
9129 	if (pci_dev->subsystem_vendor == PCI_VENDOR_ID_ADAPTEC2 && pci_dev->subsystem_device == 0x1304)
9130 		return RESTART;
9131 
9132 	return SUSPEND;
9133 }
9134 
9135 static int pqi_suspend_or_freeze(struct device *dev, bool suspend)
9136 {
9137 	struct pci_dev *pci_dev;
9138 	struct pqi_ctrl_info *ctrl_info;
9139 
9140 	pci_dev = to_pci_dev(dev);
9141 	ctrl_info = pci_get_drvdata(pci_dev);
9142 
9143 	pqi_wait_until_ofa_finished(ctrl_info);
9144 
9145 	pqi_ctrl_block_scan(ctrl_info);
9146 	pqi_scsi_block_requests(ctrl_info);
9147 	pqi_ctrl_block_device_reset(ctrl_info);
9148 	pqi_ctrl_block_requests(ctrl_info);
9149 	pqi_ctrl_wait_until_quiesced(ctrl_info);
9150 
9151 	if (suspend) {
9152 		enum bmic_flush_cache_shutdown_event shutdown_event;
9153 
9154 		shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
9155 		pqi_flush_cache(ctrl_info, shutdown_event);
9156 	}
9157 
9158 	pqi_stop_heartbeat_timer(ctrl_info);
9159 	pqi_crash_if_pending_command(ctrl_info);
9160 	pqi_free_irqs(ctrl_info);
9161 
9162 	ctrl_info->controller_online = false;
9163 	ctrl_info->pqi_mode_enabled = false;
9164 
9165 	return 0;
9166 }
9167 
9168 static __maybe_unused int pqi_suspend(struct device *dev)
9169 {
9170 	return pqi_suspend_or_freeze(dev, true);
9171 }
9172 
9173 static int pqi_resume_or_restore(struct device *dev)
9174 {
9175 	int rc;
9176 	struct pci_dev *pci_dev;
9177 	struct pqi_ctrl_info *ctrl_info;
9178 
9179 	pci_dev = to_pci_dev(dev);
9180 	ctrl_info = pci_get_drvdata(pci_dev);
9181 
9182 	rc = pqi_request_irqs(ctrl_info);
9183 	if (rc)
9184 		return rc;
9185 
9186 	pqi_ctrl_unblock_device_reset(ctrl_info);
9187 	pqi_ctrl_unblock_requests(ctrl_info);
9188 	pqi_scsi_unblock_requests(ctrl_info);
9189 	pqi_ctrl_unblock_scan(ctrl_info);
9190 
9191 	ssleep(PQI_POST_RESET_DELAY_SECS);
9192 
9193 	return pqi_ctrl_init_resume(ctrl_info);
9194 }
9195 
9196 static int pqi_freeze(struct device *dev)
9197 {
9198 	return pqi_suspend_or_freeze(dev, false);
9199 }
9200 
9201 static int pqi_thaw(struct device *dev)
9202 {
9203 	int rc;
9204 	struct pci_dev *pci_dev;
9205 	struct pqi_ctrl_info *ctrl_info;
9206 
9207 	pci_dev = to_pci_dev(dev);
9208 	ctrl_info = pci_get_drvdata(pci_dev);
9209 
9210 	rc = pqi_request_irqs(ctrl_info);
9211 	if (rc)
9212 		return rc;
9213 
9214 	ctrl_info->controller_online = true;
9215 	ctrl_info->pqi_mode_enabled = true;
9216 
9217 	pqi_ctrl_unblock_device_reset(ctrl_info);
9218 	pqi_ctrl_unblock_requests(ctrl_info);
9219 	pqi_scsi_unblock_requests(ctrl_info);
9220 	pqi_ctrl_unblock_scan(ctrl_info);
9221 
9222 	return 0;
9223 }
9224 
9225 static int pqi_poweroff(struct device *dev)
9226 {
9227 	struct pci_dev *pci_dev;
9228 	struct pqi_ctrl_info *ctrl_info;
9229 	enum bmic_flush_cache_shutdown_event shutdown_event;
9230 
9231 	pci_dev = to_pci_dev(dev);
9232 	ctrl_info = pci_get_drvdata(pci_dev);
9233 
9234 	shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
9235 	pqi_flush_cache(ctrl_info, shutdown_event);
9236 
9237 	return 0;
9238 }
9239 
9240 static const struct dev_pm_ops pqi_pm_ops = {
9241 	.suspend = pqi_suspend,
9242 	.resume = pqi_resume_or_restore,
9243 	.freeze = pqi_freeze,
9244 	.thaw = pqi_thaw,
9245 	.poweroff = pqi_poweroff,
9246 	.restore = pqi_resume_or_restore,
9247 };
9248 
9249 #endif /* CONFIG_PM */
9250 
9251 /* Define the PCI IDs for the controllers that we support. */
9252 static const struct pci_device_id pqi_pci_id_table[] = {
9253 	{
9254 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9255 			       0x105b, 0x1211)
9256 	},
9257 	{
9258 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9259 			       0x105b, 0x1321)
9260 	},
9261 	{
9262 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9263 			       0x152d, 0x8a22)
9264 	},
9265 	{
9266 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9267 			       0x152d, 0x8a23)
9268 	},
9269 	{
9270 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9271 			       0x152d, 0x8a24)
9272 	},
9273 	{
9274 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9275 			       0x152d, 0x8a36)
9276 	},
9277 	{
9278 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9279 			       0x152d, 0x8a37)
9280 	},
9281 	{
9282 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9283 			       0x193d, 0x1104)
9284 	},
9285 	{
9286 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9287 			       0x193d, 0x1105)
9288 	},
9289 	{
9290 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9291 			       0x193d, 0x1106)
9292 	},
9293 	{
9294 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9295 			       0x193d, 0x1107)
9296 	},
9297 	{
9298 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9299 			       0x193d, 0x1108)
9300 	},
9301 	{
9302 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9303 			       0x193d, 0x1109)
9304 	},
9305 	{
9306 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9307 			       0x193d, 0x8460)
9308 	},
9309 	{
9310 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9311 			       0x193d, 0x8461)
9312 	},
9313 	{
9314 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9315 			       0x193d, 0xc460)
9316 	},
9317 	{
9318 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9319 			       0x193d, 0xc461)
9320 	},
9321 	{
9322 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9323 			       0x193d, 0xf460)
9324 	},
9325 	{
9326 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9327 			       0x193d, 0xf461)
9328 	},
9329 	{
9330 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9331 			       0x1bd4, 0x0045)
9332 	},
9333 	{
9334 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9335 			       0x1bd4, 0x0046)
9336 	},
9337 	{
9338 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9339 			       0x1bd4, 0x0047)
9340 	},
9341 	{
9342 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9343 			       0x1bd4, 0x0048)
9344 	},
9345 	{
9346 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9347 			       0x1bd4, 0x004a)
9348 	},
9349 	{
9350 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9351 			       0x1bd4, 0x004b)
9352 	},
9353 	{
9354 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9355 			       0x1bd4, 0x004c)
9356 	},
9357 	{
9358 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9359 			       0x1bd4, 0x004f)
9360 	},
9361 	{
9362 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9363 			       0x1bd4, 0x0051)
9364 	},
9365 	{
9366 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9367 			       0x1bd4, 0x0052)
9368 	},
9369 	{
9370 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9371 			       0x1bd4, 0x0053)
9372 	},
9373 	{
9374 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9375 			       0x1bd4, 0x0054)
9376 	},
9377 	{
9378 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9379 			       0x1bd4, 0x006b)
9380 	},
9381 	{
9382 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9383 			       0x1bd4, 0x006c)
9384 	},
9385 	{
9386 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9387 			       0x1bd4, 0x006d)
9388 	},
9389 	{
9390 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9391 			       0x1bd4, 0x006f)
9392 	},
9393 	{
9394 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9395 			       0x1bd4, 0x0070)
9396 	},
9397 	{
9398 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9399 			       0x1bd4, 0x0071)
9400 	},
9401 	{
9402 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9403 			       0x1bd4, 0x0072)
9404 	},
9405 	{
9406 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9407 			       0x19e5, 0xd227)
9408 	},
9409 	{
9410 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9411 			       0x19e5, 0xd228)
9412 	},
9413 	{
9414 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9415 			       0x19e5, 0xd229)
9416 	},
9417 	{
9418 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9419 			       0x19e5, 0xd22a)
9420 	},
9421 	{
9422 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9423 			       0x19e5, 0xd22b)
9424 	},
9425 	{
9426 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9427 			       0x19e5, 0xd22c)
9428 	},
9429 	{
9430 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9431 			       PCI_VENDOR_ID_ADAPTEC2, 0x0110)
9432 	},
9433 	{
9434 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9435 			       PCI_VENDOR_ID_ADAPTEC2, 0x0608)
9436 	},
9437 	{
9438 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9439 			       PCI_VENDOR_ID_ADAPTEC2, 0x0659)
9440 	},
9441 	{
9442 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9443 			       PCI_VENDOR_ID_ADAPTEC2, 0x0800)
9444 	},
9445 	{
9446 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9447 			       PCI_VENDOR_ID_ADAPTEC2, 0x0801)
9448 	},
9449 	{
9450 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9451 			       PCI_VENDOR_ID_ADAPTEC2, 0x0802)
9452 	},
9453 	{
9454 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9455 			       PCI_VENDOR_ID_ADAPTEC2, 0x0803)
9456 	},
9457 	{
9458 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9459 			       PCI_VENDOR_ID_ADAPTEC2, 0x0804)
9460 	},
9461 	{
9462 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9463 			       PCI_VENDOR_ID_ADAPTEC2, 0x0805)
9464 	},
9465 	{
9466 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9467 			       PCI_VENDOR_ID_ADAPTEC2, 0x0806)
9468 	},
9469 	{
9470 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9471 			       PCI_VENDOR_ID_ADAPTEC2, 0x0807)
9472 	},
9473 	{
9474 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9475 			       PCI_VENDOR_ID_ADAPTEC2, 0x0808)
9476 	},
9477 	{
9478 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9479 			       PCI_VENDOR_ID_ADAPTEC2, 0x0809)
9480 	},
9481 	{
9482 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9483 			       PCI_VENDOR_ID_ADAPTEC2, 0x080a)
9484 	},
9485 	{
9486 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9487 			       PCI_VENDOR_ID_ADAPTEC2, 0x0900)
9488 	},
9489 	{
9490 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9491 			       PCI_VENDOR_ID_ADAPTEC2, 0x0901)
9492 	},
9493 	{
9494 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9495 			       PCI_VENDOR_ID_ADAPTEC2, 0x0902)
9496 	},
9497 	{
9498 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9499 			       PCI_VENDOR_ID_ADAPTEC2, 0x0903)
9500 	},
9501 	{
9502 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9503 			       PCI_VENDOR_ID_ADAPTEC2, 0x0904)
9504 	},
9505 	{
9506 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9507 			       PCI_VENDOR_ID_ADAPTEC2, 0x0905)
9508 	},
9509 	{
9510 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9511 			       PCI_VENDOR_ID_ADAPTEC2, 0x0906)
9512 	},
9513 	{
9514 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9515 			       PCI_VENDOR_ID_ADAPTEC2, 0x0907)
9516 	},
9517 	{
9518 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9519 			       PCI_VENDOR_ID_ADAPTEC2, 0x0908)
9520 	},
9521 	{
9522 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9523 			       PCI_VENDOR_ID_ADAPTEC2, 0x090a)
9524 	},
9525 	{
9526 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9527 			       PCI_VENDOR_ID_ADAPTEC2, 0x1200)
9528 	},
9529 	{
9530 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9531 			       PCI_VENDOR_ID_ADAPTEC2, 0x1201)
9532 	},
9533 	{
9534 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9535 			       PCI_VENDOR_ID_ADAPTEC2, 0x1202)
9536 	},
9537 	{
9538 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9539 			       PCI_VENDOR_ID_ADAPTEC2, 0x1280)
9540 	},
9541 	{
9542 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9543 			       PCI_VENDOR_ID_ADAPTEC2, 0x1281)
9544 	},
9545 	{
9546 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9547 			       PCI_VENDOR_ID_ADAPTEC2, 0x1282)
9548 	},
9549 	{
9550 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9551 			       PCI_VENDOR_ID_ADAPTEC2, 0x1300)
9552 	},
9553 	{
9554 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9555 			       PCI_VENDOR_ID_ADAPTEC2, 0x1301)
9556 	},
9557 	{
9558 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9559 			       PCI_VENDOR_ID_ADAPTEC2, 0x1302)
9560 	},
9561 	{
9562 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9563 			       PCI_VENDOR_ID_ADAPTEC2, 0x1303)
9564 	},
9565 	{
9566 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9567 			       PCI_VENDOR_ID_ADAPTEC2, 0x1304)
9568 	},
9569 	{
9570 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9571 			       PCI_VENDOR_ID_ADAPTEC2, 0x1380)
9572 	},
9573 	{
9574 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9575 			       PCI_VENDOR_ID_ADAPTEC2, 0x1400)
9576 	},
9577 	{
9578 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9579 			       PCI_VENDOR_ID_ADAPTEC2, 0x1402)
9580 	},
9581 	{
9582 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9583 			       PCI_VENDOR_ID_ADAPTEC2, 0x1410)
9584 	},
9585 	{
9586 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9587 			       PCI_VENDOR_ID_ADAPTEC2, 0x1411)
9588 	},
9589 	{
9590 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9591 			       PCI_VENDOR_ID_ADAPTEC2, 0x1412)
9592 	},
9593 	{
9594 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9595 			       PCI_VENDOR_ID_ADAPTEC2, 0x1420)
9596 	},
9597 	{
9598 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9599 			       PCI_VENDOR_ID_ADAPTEC2, 0x1430)
9600 	},
9601 	{
9602 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9603 			       PCI_VENDOR_ID_ADAPTEC2, 0x1440)
9604 	},
9605 	{
9606 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9607 			       PCI_VENDOR_ID_ADAPTEC2, 0x1441)
9608 	},
9609 	{
9610 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9611 			       PCI_VENDOR_ID_ADAPTEC2, 0x1450)
9612 	},
9613 	{
9614 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9615 			       PCI_VENDOR_ID_ADAPTEC2, 0x1452)
9616 	},
9617 	{
9618 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9619 			       PCI_VENDOR_ID_ADAPTEC2, 0x1460)
9620 	},
9621 	{
9622 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9623 			       PCI_VENDOR_ID_ADAPTEC2, 0x1461)
9624 	},
9625 	{
9626 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9627 			       PCI_VENDOR_ID_ADAPTEC2, 0x1462)
9628 	},
9629 	{
9630 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9631 			       PCI_VENDOR_ID_ADAPTEC2, 0x1463)
9632 	},
9633 	{
9634 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9635 			       PCI_VENDOR_ID_ADAPTEC2, 0x1470)
9636 	},
9637 	{
9638 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9639 			       PCI_VENDOR_ID_ADAPTEC2, 0x1471)
9640 	},
9641 	{
9642 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9643 			       PCI_VENDOR_ID_ADAPTEC2, 0x1472)
9644 	},
9645 	{
9646 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9647 			       PCI_VENDOR_ID_ADAPTEC2, 0x1473)
9648 	},
9649 	{
9650 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9651 			       PCI_VENDOR_ID_ADAPTEC2, 0x1474)
9652 	},
9653 	{
9654 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9655 			       PCI_VENDOR_ID_ADAPTEC2, 0x1480)
9656 	},
9657 	{
9658 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9659 			       PCI_VENDOR_ID_ADAPTEC2, 0x1490)
9660 	},
9661 	{
9662 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9663 			       PCI_VENDOR_ID_ADAPTEC2, 0x1491)
9664 	},
9665 	{
9666 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9667 			       PCI_VENDOR_ID_ADAPTEC2, 0x14a0)
9668 	},
9669 	{
9670 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9671 			       PCI_VENDOR_ID_ADAPTEC2, 0x14a1)
9672 	},
9673 	{
9674 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9675 			       PCI_VENDOR_ID_ADAPTEC2, 0x14a2)
9676 	},
9677 	{
9678 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9679 			       PCI_VENDOR_ID_ADAPTEC2, 0x14a4)
9680 	},
9681 	{
9682 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9683 			       PCI_VENDOR_ID_ADAPTEC2, 0x14a5)
9684 	},
9685 	{
9686 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9687 			       PCI_VENDOR_ID_ADAPTEC2, 0x14a6)
9688 	},
9689 	{
9690 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9691 			       PCI_VENDOR_ID_ADAPTEC2, 0x14b0)
9692 	},
9693 	{
9694 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9695 			       PCI_VENDOR_ID_ADAPTEC2, 0x14b1)
9696 	},
9697 	{
9698 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9699 			       PCI_VENDOR_ID_ADAPTEC2, 0x14c0)
9700 	},
9701 	{
9702 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9703 			       PCI_VENDOR_ID_ADAPTEC2, 0x14c1)
9704 	},
9705 	{
9706 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9707 			       PCI_VENDOR_ID_ADAPTEC2, 0x14c2)
9708 	},
9709 	{
9710 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9711 			       PCI_VENDOR_ID_ADAPTEC2, 0x14d0)
9712 	},
9713 	{
9714 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9715 			       PCI_VENDOR_ID_ADAPTEC2, 0x14e0)
9716 	},
9717 	{
9718 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9719 			       PCI_VENDOR_ID_ADAPTEC2, 0x14f0)
9720 	},
9721 	{
9722 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9723 			       PCI_VENDOR_ID_ADVANTECH, 0x8312)
9724 	},
9725 	{
9726 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9727 			       PCI_VENDOR_ID_DELL, 0x1fe0)
9728 	},
9729 	{
9730 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9731 			       PCI_VENDOR_ID_HP, 0x0600)
9732 	},
9733 	{
9734 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9735 			       PCI_VENDOR_ID_HP, 0x0601)
9736 	},
9737 	{
9738 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9739 			       PCI_VENDOR_ID_HP, 0x0602)
9740 	},
9741 	{
9742 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9743 			       PCI_VENDOR_ID_HP, 0x0603)
9744 	},
9745 	{
9746 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9747 			       PCI_VENDOR_ID_HP, 0x0609)
9748 	},
9749 	{
9750 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9751 			       PCI_VENDOR_ID_HP, 0x0650)
9752 	},
9753 	{
9754 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9755 			       PCI_VENDOR_ID_HP, 0x0651)
9756 	},
9757 	{
9758 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9759 			       PCI_VENDOR_ID_HP, 0x0652)
9760 	},
9761 	{
9762 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9763 			       PCI_VENDOR_ID_HP, 0x0653)
9764 	},
9765 	{
9766 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9767 			       PCI_VENDOR_ID_HP, 0x0654)
9768 	},
9769 	{
9770 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9771 			       PCI_VENDOR_ID_HP, 0x0655)
9772 	},
9773 	{
9774 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9775 			       PCI_VENDOR_ID_HP, 0x0700)
9776 	},
9777 	{
9778 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9779 			       PCI_VENDOR_ID_HP, 0x0701)
9780 	},
9781 	{
9782 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9783 			       PCI_VENDOR_ID_HP, 0x1001)
9784 	},
9785 	{
9786 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9787 			       PCI_VENDOR_ID_HP, 0x1002)
9788 	},
9789 	{
9790 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9791 			       PCI_VENDOR_ID_HP, 0x1100)
9792 	},
9793 	{
9794 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9795 			       PCI_VENDOR_ID_HP, 0x1101)
9796 	},
9797 	{
9798 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9799 			       0x1590, 0x0294)
9800 	},
9801 	{
9802 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9803 			       0x1590, 0x02db)
9804 	},
9805 	{
9806 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9807 			       0x1590, 0x02dc)
9808 	},
9809 	{
9810 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9811 			       0x1590, 0x032e)
9812 	},
9813 	{
9814 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9815 			       0x1590, 0x036f)
9816 	},
9817 	{
9818 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9819 			       0x1590, 0x0381)
9820 	},
9821 	{
9822 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9823 			       0x1590, 0x0382)
9824 	},
9825 	{
9826 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9827 			       0x1590, 0x0383)
9828 	},
9829 	{
9830 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9831 			       0x1d8d, 0x0800)
9832 	},
9833 	{
9834 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9835 			       0x1d8d, 0x0908)
9836 	},
9837 	{
9838 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9839 			       0x1d8d, 0x0806)
9840 	},
9841 	{
9842 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9843 			       0x1d8d, 0x0916)
9844 	},
9845 	{
9846 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9847 			       PCI_VENDOR_ID_GIGABYTE, 0x1000)
9848 	},
9849 	{
9850 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9851 			       0x1dfc, 0x3161)
9852 	},
9853 	{
9854 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9855 			       0x1f0c, 0x3161)
9856 	},
9857 	{
9858 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9859 			       0x1cf2, 0x5445)
9860 	},
9861 	{
9862 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9863 			       0x1cf2, 0x5446)
9864 	},
9865 	{
9866 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9867 			       0x1cf2, 0x5447)
9868 	},
9869 	{
9870 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9871 			       0x1cf2, 0x5449)
9872 	},
9873 	{
9874 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9875 			       0x1cf2, 0x544a)
9876 	},
9877 	{
9878 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9879 			       0x1cf2, 0x544b)
9880 	},
9881 	{
9882 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9883 			       0x1cf2, 0x544d)
9884 	},
9885 	{
9886 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9887 			       0x1cf2, 0x544e)
9888 	},
9889 	{
9890 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9891 			       0x1cf2, 0x544f)
9892 	},
9893 	{
9894 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9895 			       0x1cf2, 0x0b27)
9896 	},
9897 	{
9898 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9899 			       0x1cf2, 0x0b29)
9900 	},
9901 	{
9902 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9903 			       0x1cf2, 0x0b45)
9904 	},
9905 	{
9906 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9907 			       0x1cc4, 0x0101)
9908 	},
9909 	{
9910 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9911 			       0x1cc4, 0x0201)
9912 	},
9913 	{
9914 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9915 			       PCI_VENDOR_ID_LENOVO, 0x0220)
9916 	},
9917 	{
9918 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9919 			       PCI_VENDOR_ID_LENOVO, 0x0221)
9920 	},
9921 	{
9922 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9923 			       PCI_VENDOR_ID_LENOVO, 0x0520)
9924 	},
9925 	{
9926 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9927 			       PCI_VENDOR_ID_LENOVO, 0x0522)
9928 	},
9929 	{
9930 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9931 			       PCI_VENDOR_ID_LENOVO, 0x0620)
9932 	},
9933 	{
9934 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9935 			       PCI_VENDOR_ID_LENOVO, 0x0621)
9936 	},
9937 	{
9938 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9939 			       PCI_VENDOR_ID_LENOVO, 0x0622)
9940 	},
9941 	{
9942 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9943 			       PCI_VENDOR_ID_LENOVO, 0x0623)
9944 	},
9945 	{
9946 		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9947 			       PCI_ANY_ID, PCI_ANY_ID)
9948 	},
9949 	{ 0 }
9950 };
9951 
9952 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
9953 
9954 static struct pci_driver pqi_pci_driver = {
9955 	.name = DRIVER_NAME_SHORT,
9956 	.id_table = pqi_pci_id_table,
9957 	.probe = pqi_pci_probe,
9958 	.remove = pqi_pci_remove,
9959 	.shutdown = pqi_shutdown,
9960 #if defined(CONFIG_PM)
9961 	.driver = {
9962 		.pm = &pqi_pm_ops
9963 	},
9964 #endif
9965 };
9966 
9967 static int __init pqi_init(void)
9968 {
9969 	int rc;
9970 
9971 	pr_info(DRIVER_NAME "\n");
9972 	pqi_verify_structures();
9973 	sis_verify_structures();
9974 
9975 	pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions);
9976 	if (!pqi_sas_transport_template)
9977 		return -ENODEV;
9978 
9979 	pqi_process_module_params();
9980 
9981 	rc = pci_register_driver(&pqi_pci_driver);
9982 	if (rc)
9983 		sas_release_transport(pqi_sas_transport_template);
9984 
9985 	return rc;
9986 }
9987 
9988 static void __exit pqi_cleanup(void)
9989 {
9990 	pci_unregister_driver(&pqi_pci_driver);
9991 	sas_release_transport(pqi_sas_transport_template);
9992 }
9993 
9994 module_init(pqi_init);
9995 module_exit(pqi_cleanup);
9996 
9997 static void pqi_verify_structures(void)
9998 {
9999 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10000 		sis_host_to_ctrl_doorbell) != 0x20);
10001 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10002 		sis_interrupt_mask) != 0x34);
10003 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10004 		sis_ctrl_to_host_doorbell) != 0x9c);
10005 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10006 		sis_ctrl_to_host_doorbell_clear) != 0xa0);
10007 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10008 		sis_driver_scratch) != 0xb0);
10009 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10010 		sis_product_identifier) != 0xb4);
10011 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10012 		sis_firmware_status) != 0xbc);
10013 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10014 		sis_ctrl_shutdown_reason_code) != 0xcc);
10015 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10016 		sis_mailbox) != 0x1000);
10017 	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10018 		pqi_registers) != 0x4000);
10019 
10020 	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10021 		iu_type) != 0x0);
10022 	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10023 		iu_length) != 0x2);
10024 	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10025 		response_queue_id) != 0x4);
10026 	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10027 		driver_flags) != 0x6);
10028 	BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
10029 
10030 	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10031 		status) != 0x0);
10032 	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10033 		service_response) != 0x1);
10034 	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10035 		data_present) != 0x2);
10036 	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10037 		reserved) != 0x3);
10038 	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10039 		residual_count) != 0x4);
10040 	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10041 		data_length) != 0x8);
10042 	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10043 		reserved1) != 0xa);
10044 	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10045 		data) != 0xc);
10046 	BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
10047 
10048 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10049 		data_in_result) != 0x0);
10050 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10051 		data_out_result) != 0x1);
10052 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10053 		reserved) != 0x2);
10054 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10055 		status) != 0x5);
10056 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10057 		status_qualifier) != 0x6);
10058 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10059 		sense_data_length) != 0x8);
10060 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10061 		response_data_length) != 0xa);
10062 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10063 		data_in_transferred) != 0xc);
10064 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10065 		data_out_transferred) != 0x10);
10066 	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10067 		data) != 0x14);
10068 	BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
10069 
10070 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10071 		signature) != 0x0);
10072 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10073 		function_and_status_code) != 0x8);
10074 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10075 		max_admin_iq_elements) != 0x10);
10076 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10077 		max_admin_oq_elements) != 0x11);
10078 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10079 		admin_iq_element_length) != 0x12);
10080 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10081 		admin_oq_element_length) != 0x13);
10082 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10083 		max_reset_timeout) != 0x14);
10084 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10085 		legacy_intx_status) != 0x18);
10086 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10087 		legacy_intx_mask_set) != 0x1c);
10088 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10089 		legacy_intx_mask_clear) != 0x20);
10090 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10091 		device_status) != 0x40);
10092 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10093 		admin_iq_pi_offset) != 0x48);
10094 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10095 		admin_oq_ci_offset) != 0x50);
10096 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10097 		admin_iq_element_array_addr) != 0x58);
10098 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10099 		admin_oq_element_array_addr) != 0x60);
10100 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10101 		admin_iq_ci_addr) != 0x68);
10102 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10103 		admin_oq_pi_addr) != 0x70);
10104 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10105 		admin_iq_num_elements) != 0x78);
10106 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10107 		admin_oq_num_elements) != 0x79);
10108 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10109 		admin_queue_int_msg_num) != 0x7a);
10110 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10111 		device_error) != 0x80);
10112 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10113 		error_details) != 0x88);
10114 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10115 		device_reset) != 0x90);
10116 	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10117 		power_action) != 0x94);
10118 	BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
10119 
10120 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10121 		header.iu_type) != 0);
10122 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10123 		header.iu_length) != 2);
10124 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10125 		header.driver_flags) != 6);
10126 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10127 		request_id) != 8);
10128 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10129 		function_code) != 10);
10130 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10131 		data.report_device_capability.buffer_length) != 44);
10132 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10133 		data.report_device_capability.sg_descriptor) != 48);
10134 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10135 		data.create_operational_iq.queue_id) != 12);
10136 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10137 		data.create_operational_iq.element_array_addr) != 16);
10138 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10139 		data.create_operational_iq.ci_addr) != 24);
10140 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10141 		data.create_operational_iq.num_elements) != 32);
10142 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10143 		data.create_operational_iq.element_length) != 34);
10144 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10145 		data.create_operational_iq.queue_protocol) != 36);
10146 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10147 		data.create_operational_oq.queue_id) != 12);
10148 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10149 		data.create_operational_oq.element_array_addr) != 16);
10150 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10151 		data.create_operational_oq.pi_addr) != 24);
10152 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10153 		data.create_operational_oq.num_elements) != 32);
10154 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10155 		data.create_operational_oq.element_length) != 34);
10156 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10157 		data.create_operational_oq.queue_protocol) != 36);
10158 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10159 		data.create_operational_oq.int_msg_num) != 40);
10160 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10161 		data.create_operational_oq.coalescing_count) != 42);
10162 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10163 		data.create_operational_oq.min_coalescing_time) != 44);
10164 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10165 		data.create_operational_oq.max_coalescing_time) != 48);
10166 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10167 		data.delete_operational_queue.queue_id) != 12);
10168 	BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
10169 	BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10170 		data.create_operational_iq) != 64 - 11);
10171 	BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10172 		data.create_operational_oq) != 64 - 11);
10173 	BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10174 		data.delete_operational_queue) != 64 - 11);
10175 
10176 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10177 		header.iu_type) != 0);
10178 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10179 		header.iu_length) != 2);
10180 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10181 		header.driver_flags) != 6);
10182 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10183 		request_id) != 8);
10184 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10185 		function_code) != 10);
10186 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10187 		status) != 11);
10188 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10189 		data.create_operational_iq.status_descriptor) != 12);
10190 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10191 		data.create_operational_iq.iq_pi_offset) != 16);
10192 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10193 		data.create_operational_oq.status_descriptor) != 12);
10194 	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10195 		data.create_operational_oq.oq_ci_offset) != 16);
10196 	BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
10197 
10198 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10199 		header.iu_type) != 0);
10200 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10201 		header.iu_length) != 2);
10202 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10203 		header.response_queue_id) != 4);
10204 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10205 		header.driver_flags) != 6);
10206 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10207 		request_id) != 8);
10208 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10209 		nexus_id) != 10);
10210 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10211 		buffer_length) != 12);
10212 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10213 		lun_number) != 16);
10214 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10215 		protocol_specific) != 24);
10216 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10217 		error_index) != 27);
10218 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10219 		cdb) != 32);
10220 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10221 		timeout) != 60);
10222 	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10223 		sg_descriptors) != 64);
10224 	BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
10225 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
10226 
10227 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10228 		header.iu_type) != 0);
10229 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10230 		header.iu_length) != 2);
10231 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10232 		header.response_queue_id) != 4);
10233 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10234 		header.driver_flags) != 6);
10235 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10236 		request_id) != 8);
10237 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10238 		nexus_id) != 12);
10239 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10240 		buffer_length) != 16);
10241 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10242 		data_encryption_key_index) != 22);
10243 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10244 		encrypt_tweak_lower) != 24);
10245 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10246 		encrypt_tweak_upper) != 28);
10247 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10248 		cdb) != 32);
10249 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10250 		error_index) != 48);
10251 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10252 		num_sg_descriptors) != 50);
10253 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10254 		cdb_length) != 51);
10255 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10256 		lun_number) != 52);
10257 	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10258 		sg_descriptors) != 64);
10259 	BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
10260 		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
10261 
10262 	BUILD_BUG_ON(offsetof(struct pqi_io_response,
10263 		header.iu_type) != 0);
10264 	BUILD_BUG_ON(offsetof(struct pqi_io_response,
10265 		header.iu_length) != 2);
10266 	BUILD_BUG_ON(offsetof(struct pqi_io_response,
10267 		request_id) != 8);
10268 	BUILD_BUG_ON(offsetof(struct pqi_io_response,
10269 		error_index) != 10);
10270 
10271 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10272 		header.iu_type) != 0);
10273 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10274 		header.iu_length) != 2);
10275 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10276 		header.response_queue_id) != 4);
10277 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10278 		request_id) != 8);
10279 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10280 		data.report_event_configuration.buffer_length) != 12);
10281 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10282 		data.report_event_configuration.sg_descriptors) != 16);
10283 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10284 		data.set_event_configuration.global_event_oq_id) != 10);
10285 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10286 		data.set_event_configuration.buffer_length) != 12);
10287 	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10288 		data.set_event_configuration.sg_descriptors) != 16);
10289 
10290 	BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
10291 		max_inbound_iu_length) != 6);
10292 	BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
10293 		max_outbound_iu_length) != 14);
10294 	BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
10295 
10296 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10297 		data_length) != 0);
10298 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10299 		iq_arbitration_priority_support_bitmask) != 8);
10300 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10301 		maximum_aw_a) != 9);
10302 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10303 		maximum_aw_b) != 10);
10304 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10305 		maximum_aw_c) != 11);
10306 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10307 		max_inbound_queues) != 16);
10308 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10309 		max_elements_per_iq) != 18);
10310 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10311 		max_iq_element_length) != 24);
10312 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10313 		min_iq_element_length) != 26);
10314 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10315 		max_outbound_queues) != 30);
10316 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10317 		max_elements_per_oq) != 32);
10318 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10319 		intr_coalescing_time_granularity) != 34);
10320 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10321 		max_oq_element_length) != 36);
10322 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10323 		min_oq_element_length) != 38);
10324 	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10325 		iu_layer_descriptors) != 64);
10326 	BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
10327 
10328 	BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
10329 		event_type) != 0);
10330 	BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
10331 		oq_id) != 2);
10332 	BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
10333 
10334 	BUILD_BUG_ON(offsetof(struct pqi_event_config,
10335 		num_event_descriptors) != 2);
10336 	BUILD_BUG_ON(offsetof(struct pqi_event_config,
10337 		descriptors) != 4);
10338 
10339 	BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
10340 		ARRAY_SIZE(pqi_supported_event_types));
10341 
10342 	BUILD_BUG_ON(offsetof(struct pqi_event_response,
10343 		header.iu_type) != 0);
10344 	BUILD_BUG_ON(offsetof(struct pqi_event_response,
10345 		header.iu_length) != 2);
10346 	BUILD_BUG_ON(offsetof(struct pqi_event_response,
10347 		event_type) != 8);
10348 	BUILD_BUG_ON(offsetof(struct pqi_event_response,
10349 		event_id) != 10);
10350 	BUILD_BUG_ON(offsetof(struct pqi_event_response,
10351 		additional_event_id) != 12);
10352 	BUILD_BUG_ON(offsetof(struct pqi_event_response,
10353 		data) != 16);
10354 	BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
10355 
10356 	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10357 		header.iu_type) != 0);
10358 	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10359 		header.iu_length) != 2);
10360 	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10361 		event_type) != 8);
10362 	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10363 		event_id) != 10);
10364 	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10365 		additional_event_id) != 12);
10366 	BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
10367 
10368 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10369 		header.iu_type) != 0);
10370 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10371 		header.iu_length) != 2);
10372 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10373 		request_id) != 8);
10374 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10375 		nexus_id) != 10);
10376 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10377 		timeout) != 14);
10378 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10379 		lun_number) != 16);
10380 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10381 		protocol_specific) != 24);
10382 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10383 		outbound_queue_id_to_manage) != 26);
10384 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10385 		request_id_to_manage) != 28);
10386 	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10387 		task_management_function) != 30);
10388 	BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
10389 
10390 	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10391 		header.iu_type) != 0);
10392 	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10393 		header.iu_length) != 2);
10394 	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10395 		request_id) != 8);
10396 	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10397 		nexus_id) != 10);
10398 	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10399 		additional_response_info) != 12);
10400 	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10401 		response_code) != 15);
10402 	BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
10403 
10404 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10405 		configured_logical_drive_count) != 0);
10406 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10407 		configuration_signature) != 1);
10408 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10409 		firmware_version_short) != 5);
10410 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10411 		extended_logical_unit_count) != 154);
10412 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10413 		firmware_build_number) != 190);
10414 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10415 		vendor_id) != 200);
10416 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10417 		product_id) != 208);
10418 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10419 		extra_controller_flags) != 286);
10420 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10421 		controller_mode) != 292);
10422 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10423 		spare_part_number) != 293);
10424 	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10425 		firmware_version_long) != 325);
10426 
10427 	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10428 		phys_bay_in_box) != 115);
10429 	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10430 		device_type) != 120);
10431 	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10432 		redundant_path_present_map) != 1736);
10433 	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10434 		active_path_number) != 1738);
10435 	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10436 		alternate_paths_phys_connector) != 1739);
10437 	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10438 		alternate_paths_phys_box_on_port) != 1755);
10439 	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10440 		current_queue_depth_limit) != 1796);
10441 	BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
10442 
10443 	BUILD_BUG_ON(sizeof(struct bmic_sense_feature_buffer_header) != 4);
10444 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10445 		page_code) != 0);
10446 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10447 		subpage_code) != 1);
10448 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10449 		buffer_length) != 2);
10450 
10451 	BUILD_BUG_ON(sizeof(struct bmic_sense_feature_page_header) != 4);
10452 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10453 		page_code) != 0);
10454 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10455 		subpage_code) != 1);
10456 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10457 		page_length) != 2);
10458 
10459 	BUILD_BUG_ON(sizeof(struct bmic_sense_feature_io_page_aio_subpage)
10460 		!= 18);
10461 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10462 		header) != 0);
10463 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10464 		firmware_read_support) != 4);
10465 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10466 		driver_read_support) != 5);
10467 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10468 		firmware_write_support) != 6);
10469 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10470 		driver_write_support) != 7);
10471 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10472 		max_transfer_encrypted_sas_sata) != 8);
10473 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10474 		max_transfer_encrypted_nvme) != 10);
10475 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10476 		max_write_raid_5_6) != 12);
10477 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10478 		max_write_raid_1_10_2drive) != 14);
10479 	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10480 		max_write_raid_1_10_3drive) != 16);
10481 
10482 	BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
10483 	BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
10484 	BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
10485 		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10486 	BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
10487 		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10488 	BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
10489 	BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
10490 		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10491 	BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
10492 	BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
10493 		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10494 
10495 	BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
10496 	BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
10497 		PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
10498 }
10499