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rsxx: Changing the adapter name to the official name.
[linux-2.6-block.git] / drivers / block / rsxx / core.c
CommitLineData
8722ff8c 1/*
2* Filename: core.c
3*
4*
5* Authors: Joshua Morris <josh.h.morris@us.ibm.com>
6* Philip Kelleher <pjk1939@linux.vnet.ibm.com>
7*
8* (C) Copyright 2013 IBM Corporation
9*
10* This program is free software; you can redistribute it and/or
11* modify it under the terms of the GNU General Public License as
12* published by the Free Software Foundation; either version 2 of the
13* License, or (at your option) any later version.
14*
15* This program is distributed in the hope that it will be useful, but
16* WITHOUT ANY WARRANTY; without even the implied warranty of
17* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18* General Public License for more details.
19*
20* You should have received a copy of the GNU General Public License
21* along with this program; if not, write to the Free Software Foundation,
22* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23*/
24
25#include <linux/kernel.h>
26#include <linux/init.h>
27#include <linux/interrupt.h>
28#include <linux/module.h>
29#include <linux/pci.h>
30#include <linux/reboot.h>
31#include <linux/slab.h>
32#include <linux/bitops.h>
c95246c3 33#include <linux/delay.h>
8722ff8c 34
35#include <linux/genhd.h>
36#include <linux/idr.h>
37
38#include "rsxx_priv.h"
39#include "rsxx_cfg.h"
40
41#define NO_LEGACY 0
fb065cd9 42#define SYNC_START_TIMEOUT (10 * 60) /* 10 minutes */
8722ff8c 43
f730e3dc 44MODULE_DESCRIPTION("IBM Flash Adapter 900GB Full Height Device Driver");
9bb3c446 45MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM");
8722ff8c 46MODULE_LICENSE("GPL");
47MODULE_VERSION(DRIVER_VERSION);
48
49static unsigned int force_legacy = NO_LEGACY;
50module_param(force_legacy, uint, 0444);
51MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts");
52
fb065cd9
PK		 53static unsigned int sync_start = 1;
54module_param(sync_start, uint, 0444);
55MODULE_PARM_DESC(sync_start, "On by Default: Driver load will not complete "
56 "until the card startup has completed.");
57
8722ff8c 58static DEFINE_IDA(rsxx_disk_ida);
59static DEFINE_SPINLOCK(rsxx_ida_lock);
60
61/*----------------- Interrupt Control & Handling -------------------*/
c95246c3
PK		 62
63static void rsxx_mask_interrupts(struct rsxx_cardinfo *card)
64{
65 card->isr_mask = 0;
66 card->ier_mask = 0;
67}
68
8722ff8c 69static void __enable_intr(unsigned int *mask, unsigned int intr)
70{
71 *mask |= intr;
72}
73
74static void __disable_intr(unsigned int *mask, unsigned int intr)
75{
76 *mask &= ~intr;
77}
78
79/*
80 * NOTE: Disabling the IER will disable the hardware interrupt.
81 * Disabling the ISR will disable the software handling of the ISR bit.
82 *
83 * Enable/Disable interrupt functions assume the card->irq_lock
84 * is held by the caller.
85 */
86void rsxx_enable_ier(struct rsxx_cardinfo *card, unsigned int intr)
87{
c95246c3
PK		 88 if (unlikely(card->halt) ||
89 unlikely(card->eeh_state))
8722ff8c 90 return;
91
92 __enable_intr(&card->ier_mask, intr);
93 iowrite32(card->ier_mask, card->regmap + IER);
94}
95
96void rsxx_disable_ier(struct rsxx_cardinfo *card, unsigned int intr)
97{
c95246c3
PK		 98 if (unlikely(card->eeh_state))
99 return;
100
8722ff8c 101 __disable_intr(&card->ier_mask, intr);
102 iowrite32(card->ier_mask, card->regmap + IER);
103}
104
105void rsxx_enable_ier_and_isr(struct rsxx_cardinfo *card,
106 unsigned int intr)
107{
c95246c3
PK		 108 if (unlikely(card->halt) ||
109 unlikely(card->eeh_state))
8722ff8c 110 return;
111
112 __enable_intr(&card->isr_mask, intr);
113 __enable_intr(&card->ier_mask, intr);
114 iowrite32(card->ier_mask, card->regmap + IER);
115}
116void rsxx_disable_ier_and_isr(struct rsxx_cardinfo *card,
117 unsigned int intr)
118{
c95246c3
PK		 119 if (unlikely(card->eeh_state))
120 return;
121
8722ff8c 122 __disable_intr(&card->isr_mask, intr);
123 __disable_intr(&card->ier_mask, intr);
124 iowrite32(card->ier_mask, card->regmap + IER);
125}
126
c206c709 127static irqreturn_t rsxx_isr(int irq, void *pdata)
8722ff8c 128{
c206c709 129 struct rsxx_cardinfo *card = pdata;
8722ff8c 130 unsigned int isr;
131 int handled = 0;
132 int reread_isr;
133 int i;
134
135 spin_lock(&card->irq_lock);
136
137 do {
138 reread_isr = 0;
139
c95246c3
PK		 140 if (unlikely(card->eeh_state))
141 break;
142
8722ff8c 143 isr = ioread32(card->regmap + ISR);
144 if (isr == 0xffffffff) {
145 /*
146 * A few systems seem to have an intermittent issue
147 * where PCI reads return all Fs, but retrying the read
148 * a little later will return as expected.
149 */
150 dev_info(CARD_TO_DEV(card),
151 "ISR = 0xFFFFFFFF, retrying later\n");
152 break;
153 }
154
155 isr &= card->isr_mask;
156 if (!isr)
157 break;
158
159 for (i = 0; i < card->n_targets; i++) {
160 if (isr & CR_INTR_DMA(i)) {
161 if (card->ier_mask & CR_INTR_DMA(i)) {
162 rsxx_disable_ier(card, CR_INTR_DMA(i));
163 reread_isr = 1;
164 }
165 queue_work(card->ctrl[i].done_wq,
166 &card->ctrl[i].dma_done_work);
167 handled++;
168 }
169 }
170
171 if (isr & CR_INTR_CREG) {
a3299ab1
PK		 172 queue_work(card->creg_ctrl.creg_wq,
173 &card->creg_ctrl.done_work);
8722ff8c 174 handled++;
175 }
176
177 if (isr & CR_INTR_EVENT) {
a3299ab1 178 queue_work(card->event_wq, &card->event_work);
8722ff8c 179 rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
180 handled++;
181 }
182 } while (reread_isr);
183
184 spin_unlock(&card->irq_lock);
185
186 return handled ? IRQ_HANDLED : IRQ_NONE;
187}
188
189/*----------------- Card Event Handler -------------------*/
f3791203 190static const char * const rsxx_card_state_to_str(unsigned int state)
c206c709 191{
f3791203 192 static const char * const state_strings[] = {
c206c709
PK		 193 "Unknown", "Shutdown", "Starting", "Formatting",
194 "Uninitialized", "Good", "Shutting Down",
195 "Fault", "Read Only Fault", "dStroying"
196 };
197
198 return state_strings[ffs(state)];
199}
200
8722ff8c 201static void card_state_change(struct rsxx_cardinfo *card,
202 unsigned int new_state)
203{
204 int st;
205
206 dev_info(CARD_TO_DEV(card),
207 "card state change detected.(%s -> %s)\n",
208 rsxx_card_state_to_str(card->state),
209 rsxx_card_state_to_str(new_state));
210
211 card->state = new_state;
212
213 /* Don't attach DMA interfaces if the card has an invalid config */
214 if (!card->config_valid)
215 return;
216
217 switch (new_state) {
218 case CARD_STATE_RD_ONLY_FAULT:
219 dev_crit(CARD_TO_DEV(card),
220 "Hardware has entered read-only mode!\n");
221 /*
222 * Fall through so the DMA devices can be attached and
223 * the user can attempt to pull off their data.
224 */
225 case CARD_STATE_GOOD:
226 st = rsxx_get_card_size8(card, &card->size8);
227 if (st)
228 dev_err(CARD_TO_DEV(card),
229 "Failed attaching DMA devices\n");
230
231 if (card->config_valid)
232 set_capacity(card->gendisk, card->size8 >> 9);
233 break;
234
235 case CARD_STATE_FAULT:
236 dev_crit(CARD_TO_DEV(card),
237 "Hardware Fault reported!\n");
238 /* Fall through. */
239
240 /* Everything else, detach DMA interface if it's attached. */
241 case CARD_STATE_SHUTDOWN:
242 case CARD_STATE_STARTING:
243 case CARD_STATE_FORMATTING:
244 case CARD_STATE_UNINITIALIZED:
245 case CARD_STATE_SHUTTING_DOWN:
246 /*
247 * dStroy is a term coined by marketing to represent the low level
248 * secure erase.
249 */
250 case CARD_STATE_DSTROYING:
251 set_capacity(card->gendisk, 0);
252 break;
253 }
254}
255
256static void card_event_handler(struct work_struct *work)
257{
258 struct rsxx_cardinfo *card;
259 unsigned int state;
260 unsigned long flags;
261 int st;
262
263 card = container_of(work, struct rsxx_cardinfo, event_work);
264
265 if (unlikely(card->halt))
266 return;
267
268 /*
269 * Enable the interrupt now to avoid any weird race conditions where a
270 * state change might occur while rsxx_get_card_state() is
271 * processing a returned creg cmd.
272 */
273 spin_lock_irqsave(&card->irq_lock, flags);
274 rsxx_enable_ier_and_isr(card, CR_INTR_EVENT);
275 spin_unlock_irqrestore(&card->irq_lock, flags);
276
277 st = rsxx_get_card_state(card, &state);
278 if (st) {
279 dev_info(CARD_TO_DEV(card),
280 "Failed reading state after event.\n");
281 return;
282 }
283
284 if (card->state != state)
285 card_state_change(card, state);
286
287 if (card->creg_ctrl.creg_stats.stat & CREG_STAT_LOG_PENDING)
288 rsxx_read_hw_log(card);
289}
290
8722ff8c 291/*----------------- Card Operations -------------------*/
292static int card_shutdown(struct rsxx_cardinfo *card)
293{
294 unsigned int state;
295 signed long start;
296 const int timeout = msecs_to_jiffies(120000);
297 int st;
298
299 /* We can't issue a shutdown if the card is in a transition state */
300 start = jiffies;
301 do {
302 st = rsxx_get_card_state(card, &state);
303 if (st)
304 return st;
305 } while (state == CARD_STATE_STARTING &&
306 (jiffies - start < timeout));
307
308 if (state == CARD_STATE_STARTING)
309 return -ETIMEDOUT;
310
311 /* Only issue a shutdown if we need to */
312 if ((state != CARD_STATE_SHUTTING_DOWN) &&
313 (state != CARD_STATE_SHUTDOWN)) {
314 st = rsxx_issue_card_cmd(card, CARD_CMD_SHUTDOWN);
315 if (st)
316 return st;
317 }
318
319 start = jiffies;
320 do {
321 st = rsxx_get_card_state(card, &state);
322 if (st)
323 return st;
324 } while (state != CARD_STATE_SHUTDOWN &&
325 (jiffies - start < timeout));
326
327 if (state != CARD_STATE_SHUTDOWN)
328 return -ETIMEDOUT;
329
330 return 0;
331}
332
4dcaf472 333static int rsxx_eeh_frozen(struct pci_dev *dev)
c95246c3
PK		 334{
335 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
336 int i;
4dcaf472 337 int st;
c95246c3 338
f730e3dc 339 dev_warn(&dev->dev, "IBM Flash Adapter PCI: preparing for slot reset.\n");
c95246c3
PK		 340
341 card->eeh_state = 1;
342 rsxx_mask_interrupts(card);
343
344 /*
345 * We need to guarantee that the write for eeh_state and masking
346 * interrupts does not become reordered. This will prevent a possible
347 * race condition with the EEH code.
348 */
349 wmb();
350
351 pci_disable_device(dev);
352
4dcaf472
PK		 353 st = rsxx_eeh_save_issued_dmas(card);
354 if (st)
355 return st;
c95246c3
PK		 356
357 rsxx_eeh_save_issued_creg(card);
358
359 for (i = 0; i < card->n_targets; i++) {
360 if (card->ctrl[i].status.buf)
361 pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
362 card->ctrl[i].status.buf,
363 card->ctrl[i].status.dma_addr);
364 if (card->ctrl[i].cmd.buf)
365 pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8,
366 card->ctrl[i].cmd.buf,
367 card->ctrl[i].cmd.dma_addr);
368 }
4dcaf472
PK		 369
370 return 0;
c95246c3
PK		 371}
372
373static void rsxx_eeh_failure(struct pci_dev *dev)
374{
375 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
376 int i;
0ab4743e 377 int cnt = 0;
c95246c3 378
f730e3dc 379 dev_err(&dev->dev, "IBM Flash Adapter PCI: disabling failed card.\n");
c95246c3
PK		 380
381 card->eeh_state = 1;
0ab4743e 382 card->halt = 1;
c95246c3 383
0ab4743e
PK		 384 for (i = 0; i < card->n_targets; i++) {
385 spin_lock_bh(&card->ctrl[i].queue_lock);
386 cnt = rsxx_cleanup_dma_queue(&card->ctrl[i],
387 &card->ctrl[i].queue);
388 spin_unlock_bh(&card->ctrl[i].queue_lock);
389
390 cnt += rsxx_dma_cancel(&card->ctrl[i]);
c95246c3 391
0ab4743e
PK		 392 if (cnt)
393 dev_info(CARD_TO_DEV(card),
394 "Freed %d queued DMAs on channel %d\n",
395 cnt, card->ctrl[i].id);
396 }
c95246c3
PK		 397}
398
399static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card)
400{
401 unsigned int status;
402 int iter = 0;
403
404 /* We need to wait for the hardware to reset */
405 while (iter++ < 10) {
406 status = ioread32(card->regmap + PCI_RECONFIG);
407
408 if (status & RSXX_FLUSH_BUSY) {
409 ssleep(1);
410 continue;
411 }
412
413 if (status & RSXX_FLUSH_TIMEOUT)
414 dev_warn(CARD_TO_DEV(card), "HW: flash controller timeout\n");
415 return 0;
416 }
417
418 /* Hardware failed resetting itself. */
419 return -1;
420}
421
422static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev,
423 enum pci_channel_state error)
424{
4dcaf472
PK		 425 int st;
426
c95246c3
PK		 427 if (dev->revision < RSXX_EEH_SUPPORT)
428 return PCI_ERS_RESULT_NONE;
429
430 if (error == pci_channel_io_perm_failure) {
431 rsxx_eeh_failure(dev);
432 return PCI_ERS_RESULT_DISCONNECT;
433 }
434
4dcaf472
PK		 435 st = rsxx_eeh_frozen(dev);
436 if (st) {
437 dev_err(&dev->dev, "Slot reset setup failed\n");
438 rsxx_eeh_failure(dev);
439 return PCI_ERS_RESULT_DISCONNECT;
440 }
441
c95246c3
PK		 442 return PCI_ERS_RESULT_NEED_RESET;
443}
444
445static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev)
446{
447 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
448 unsigned long flags;
449 int i;
450 int st;
451
452 dev_warn(&dev->dev,
f730e3dc 453 "IBM Flash Adapter PCI: recovering from slot reset.\n");
c95246c3
PK		 454
455 st = pci_enable_device(dev);
456 if (st)
457 goto failed_hw_setup;
458
459 pci_set_master(dev);
460
461 st = rsxx_eeh_fifo_flush_poll(card);
462 if (st)
463 goto failed_hw_setup;
464
465 rsxx_dma_queue_reset(card);
466
467 for (i = 0; i < card->n_targets; i++) {
468 st = rsxx_hw_buffers_init(dev, &card->ctrl[i]);
469 if (st)
470 goto failed_hw_buffers_init;
471 }
472
473 if (card->config_valid)
474 rsxx_dma_configure(card);
475
476 /* Clears the ISR register from spurious interrupts */
477 st = ioread32(card->regmap + ISR);
478
479 card->eeh_state = 0;
480
481 st = rsxx_eeh_remap_dmas(card);
482 if (st)
483 goto failed_remap_dmas;
484
485 spin_lock_irqsave(&card->irq_lock, flags);
486 if (card->n_targets & RSXX_MAX_TARGETS)
487 rsxx_enable_ier_and_isr(card, CR_INTR_ALL_G);
488 else
489 rsxx_enable_ier_and_isr(card, CR_INTR_ALL_C);
490 spin_unlock_irqrestore(&card->irq_lock, flags);
491
492 rsxx_kick_creg_queue(card);
493
494 for (i = 0; i < card->n_targets; i++) {
495 spin_lock(&card->ctrl[i].queue_lock);
496 if (list_empty(&card->ctrl[i].queue)) {
497 spin_unlock(&card->ctrl[i].queue_lock);
498 continue;
499 }
500 spin_unlock(&card->ctrl[i].queue_lock);
501
502 queue_work(card->ctrl[i].issue_wq,
503 &card->ctrl[i].issue_dma_work);
504 }
505
f730e3dc 506 dev_info(&dev->dev, "IBM Flash Adapter PCI: recovery complete.\n");
c95246c3
PK		 507
508 return PCI_ERS_RESULT_RECOVERED;
509
510failed_hw_buffers_init:
511failed_remap_dmas:
512 for (i = 0; i < card->n_targets; i++) {
513 if (card->ctrl[i].status.buf)
514 pci_free_consistent(card->dev,
515 STATUS_BUFFER_SIZE8,
516 card->ctrl[i].status.buf,
517 card->ctrl[i].status.dma_addr);
518 if (card->ctrl[i].cmd.buf)
519 pci_free_consistent(card->dev,
520 COMMAND_BUFFER_SIZE8,
521 card->ctrl[i].cmd.buf,
522 card->ctrl[i].cmd.dma_addr);
523 }
524failed_hw_setup:
525 rsxx_eeh_failure(dev);
526 return PCI_ERS_RESULT_DISCONNECT;
527
528}
529
8722ff8c 530/*----------------- Driver Initialization & Setup -------------------*/
531/* Returns: 0 if the driver is compatible with the device
532 -1 if the driver is NOT compatible with the device */
533static int rsxx_compatibility_check(struct rsxx_cardinfo *card)
534{
535 unsigned char pci_rev;
536
537 pci_read_config_byte(card->dev, PCI_REVISION_ID, &pci_rev);
538
539 if (pci_rev > RS70_PCI_REV_SUPPORTED)
540 return -1;
541 return 0;
542}
543
82bed4d5 544static int rsxx_pci_probe(struct pci_dev *dev,
8722ff8c 545 const struct pci_device_id *id)
546{
547 struct rsxx_cardinfo *card;
8722ff8c 548 int st;
fb065cd9 549 unsigned int sync_timeout;
8722ff8c 550
551 dev_info(&dev->dev, "PCI-Flash SSD discovered\n");
552
553 card = kzalloc(sizeof(*card), GFP_KERNEL);
554 if (!card)
555 return -ENOMEM;
556
557 card->dev = dev;
558 pci_set_drvdata(dev, card);
559
560 do {
561 if (!ida_pre_get(&rsxx_disk_ida, GFP_KERNEL)) {
562 st = -ENOMEM;
563 goto failed_ida_get;
564 }
565
566 spin_lock(&rsxx_ida_lock);
567 st = ida_get_new(&rsxx_disk_ida, &card->disk_id);
568 spin_unlock(&rsxx_ida_lock);
569 } while (st == -EAGAIN);
570
571 if (st)
572 goto failed_ida_get;
573
574 st = pci_enable_device(dev);
575 if (st)
576 goto failed_enable;
577
578 pci_set_master(dev);
579 pci_set_dma_max_seg_size(dev, RSXX_HW_BLK_SIZE);
580
581 st = pci_set_dma_mask(dev, DMA_BIT_MASK(64));
582 if (st) {
583 dev_err(CARD_TO_DEV(card),
584 "No usable DMA configuration,aborting\n");
585 goto failed_dma_mask;
586 }
587
588 st = pci_request_regions(dev, DRIVER_NAME);
589 if (st) {
590 dev_err(CARD_TO_DEV(card),
591 "Failed to request memory region\n");
592 goto failed_request_regions;
593 }
594
595 if (pci_resource_len(dev, 0) == 0) {
596 dev_err(CARD_TO_DEV(card), "BAR0 has length 0!\n");
597 st = -ENOMEM;
598 goto failed_iomap;
599 }
600
601 card->regmap = pci_iomap(dev, 0, 0);
602 if (!card->regmap) {
603 dev_err(CARD_TO_DEV(card), "Failed to map BAR0\n");
604 st = -ENOMEM;
605 goto failed_iomap;
606 }
607
608 spin_lock_init(&card->irq_lock);
609 card->halt = 0;
c95246c3 610 card->eeh_state = 0;
8722ff8c 611
c206c709 612 spin_lock_irq(&card->irq_lock);
8722ff8c 613 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
c206c709 614 spin_unlock_irq(&card->irq_lock);
8722ff8c 615
616 if (!force_legacy) {
617 st = pci_enable_msi(dev);
618 if (st)
619 dev_warn(CARD_TO_DEV(card),
620 "Failed to enable MSI\n");
621 }
622
623 st = request_irq(dev->irq, rsxx_isr, IRQF_DISABLED | IRQF_SHARED,
624 DRIVER_NAME, card);
625 if (st) {
626 dev_err(CARD_TO_DEV(card),
627 "Failed requesting IRQ%d\n", dev->irq);
628 goto failed_irq;
629 }
630
631 /************* Setup Processor Command Interface *************/
a3299ab1
PK		 632 st = rsxx_creg_setup(card);
633 if (st) {
634 dev_err(CARD_TO_DEV(card), "Failed to setup creg interface.\n");
635 goto failed_creg_setup;
636 }
8722ff8c 637
c206c709 638 spin_lock_irq(&card->irq_lock);
8722ff8c 639 rsxx_enable_ier_and_isr(card, CR_INTR_CREG);
c206c709 640 spin_unlock_irq(&card->irq_lock);
8722ff8c 641
642 st = rsxx_compatibility_check(card);
643 if (st) {
644 dev_warn(CARD_TO_DEV(card),
645 "Incompatible driver detected. Please update the driver.\n");
646 st = -EINVAL;
647 goto failed_compatiblity_check;
648 }
649
650 /************* Load Card Config *************/
651 st = rsxx_load_config(card);
652 if (st)
653 dev_err(CARD_TO_DEV(card),
654 "Failed loading card config\n");
655
656 /************* Setup DMA Engine *************/
657 st = rsxx_get_num_targets(card, &card->n_targets);
658 if (st)
659 dev_info(CARD_TO_DEV(card),
660 "Failed reading the number of DMA targets\n");
661
662 card->ctrl = kzalloc(card->n_targets * sizeof(*card->ctrl), GFP_KERNEL);
663 if (!card->ctrl) {
664 st = -ENOMEM;
665 goto failed_dma_setup;
666 }
667
668 st = rsxx_dma_setup(card);
669 if (st) {
670 dev_info(CARD_TO_DEV(card),
671 "Failed to setup DMA engine\n");
672 goto failed_dma_setup;
673 }
674
675 /************* Setup Card Event Handler *************/
a3299ab1
PK		 676 card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event");
677 if (!card->event_wq) {
678 dev_err(CARD_TO_DEV(card), "Failed card event setup.\n");
679 goto failed_event_handler;
680 }
681
8722ff8c 682 INIT_WORK(&card->event_work, card_event_handler);
683
684 st = rsxx_setup_dev(card);
685 if (st)
686 goto failed_create_dev;
687
688 rsxx_get_card_state(card, &card->state);
689
690 dev_info(CARD_TO_DEV(card),
691 "card state: %s\n",
692 rsxx_card_state_to_str(card->state));
693
694 /*
695 * Now that the DMA Engine and devices have been setup,
696 * we can enable the event interrupt(it kicks off actions in
697 * those layers so we couldn't enable it right away.)
698 */
c206c709 699 spin_lock_irq(&card->irq_lock);
8722ff8c 700 rsxx_enable_ier_and_isr(card, CR_INTR_EVENT);
c206c709 701 spin_unlock_irq(&card->irq_lock);
8722ff8c 702
703 if (card->state == CARD_STATE_SHUTDOWN) {
704 st = rsxx_issue_card_cmd(card, CARD_CMD_STARTUP);
705 if (st)
706 dev_crit(CARD_TO_DEV(card),
707 "Failed issuing card startup\n");
fb065cd9
PK		 708 if (sync_start) {
709 sync_timeout = SYNC_START_TIMEOUT;
710
711 dev_info(CARD_TO_DEV(card),
712 "Waiting for card to startup\n");
713
714 do {
715 ssleep(1);
716 sync_timeout--;
717
718 rsxx_get_card_state(card, &card->state);
719 } while (sync_timeout &&
720 (card->state == CARD_STATE_STARTING));
721
722 if (card->state == CARD_STATE_STARTING) {
723 dev_warn(CARD_TO_DEV(card),
724 "Card startup timed out\n");
725 card->size8 = 0;
726 } else {
727 dev_info(CARD_TO_DEV(card),
728 "card state: %s\n",
729 rsxx_card_state_to_str(card->state));
730 st = rsxx_get_card_size8(card, &card->size8);
731 if (st)
732 card->size8 = 0;
733 }
734 }
8722ff8c 735 } else if (card->state == CARD_STATE_GOOD ||
736 card->state == CARD_STATE_RD_ONLY_FAULT) {
737 st = rsxx_get_card_size8(card, &card->size8);
738 if (st)
739 card->size8 = 0;
740 }
741
742 rsxx_attach_dev(card);
743
744 return 0;
745
746failed_create_dev:
a3299ab1
PK		 747 destroy_workqueue(card->event_wq);
748 card->event_wq = NULL;
749failed_event_handler:
8722ff8c 750 rsxx_dma_destroy(card);
751failed_dma_setup:
752failed_compatiblity_check:
a3299ab1
PK		 753 destroy_workqueue(card->creg_ctrl.creg_wq);
754 card->creg_ctrl.creg_wq = NULL;
755failed_creg_setup:
c206c709 756 spin_lock_irq(&card->irq_lock);
8722ff8c 757 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
c206c709 758 spin_unlock_irq(&card->irq_lock);
8722ff8c 759 free_irq(dev->irq, card);
760 if (!force_legacy)
761 pci_disable_msi(dev);
762failed_irq:
763 pci_iounmap(dev, card->regmap);
764failed_iomap:
765 pci_release_regions(dev);
766failed_request_regions:
767failed_dma_mask:
768 pci_disable_device(dev);
769failed_enable:
770 spin_lock(&rsxx_ida_lock);
771 ida_remove(&rsxx_disk_ida, card->disk_id);
772 spin_unlock(&rsxx_ida_lock);
773failed_ida_get:
774 kfree(card);
775
776 return st;
777}
778
82bed4d5 779static void rsxx_pci_remove(struct pci_dev *dev)
8722ff8c 780{
781 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
782 unsigned long flags;
783 int st;
784 int i;
785
786 if (!card)
787 return;
788
789 dev_info(CARD_TO_DEV(card),
790 "Removing PCI-Flash SSD.\n");
791
792 rsxx_detach_dev(card);
793
794 for (i = 0; i < card->n_targets; i++) {
795 spin_lock_irqsave(&card->irq_lock, flags);
796 rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i));
797 spin_unlock_irqrestore(&card->irq_lock, flags);
798 }
799
800 st = card_shutdown(card);
801 if (st)
802 dev_crit(CARD_TO_DEV(card), "Shutdown failed!\n");
803
804 /* Sync outstanding event handlers. */
805 spin_lock_irqsave(&card->irq_lock, flags);
806 rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
807 spin_unlock_irqrestore(&card->irq_lock, flags);
808
8722ff8c 809 cancel_work_sync(&card->event_work);
810
811 rsxx_destroy_dev(card);
812 rsxx_dma_destroy(card);
813
814 spin_lock_irqsave(&card->irq_lock, flags);
815 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
816 spin_unlock_irqrestore(&card->irq_lock, flags);
1ebfd109
PK		 817
818 /* Prevent work_structs from re-queuing themselves. */
819 card->halt = 1;
820
8722ff8c 821 free_irq(dev->irq, card);
822
823 if (!force_legacy)
824 pci_disable_msi(dev);
825
826 rsxx_creg_destroy(card);
827
828 pci_iounmap(dev, card->regmap);
829
830 pci_disable_device(dev);
831 pci_release_regions(dev);
832
833 kfree(card);
834}
835
836static int rsxx_pci_suspend(struct pci_dev *dev, pm_message_t state)
837{
838 /* We don't support suspend at this time. */
839 return -ENOSYS;
840}
841
842static void rsxx_pci_shutdown(struct pci_dev *dev)
843{
844 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
845 unsigned long flags;
846 int i;
847
848 if (!card)
849 return;
850
851 dev_info(CARD_TO_DEV(card), "Shutting down PCI-Flash SSD.\n");
852
853 rsxx_detach_dev(card);
854
855 for (i = 0; i < card->n_targets; i++) {
856 spin_lock_irqsave(&card->irq_lock, flags);
857 rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i));
858 spin_unlock_irqrestore(&card->irq_lock, flags);
859 }
860
861 card_shutdown(card);
862}
863
c95246c3
PK		 864static const struct pci_error_handlers rsxx_err_handler = {
865 .error_detected = rsxx_error_detected,
866 .slot_reset = rsxx_slot_reset,
867};
868
8722ff8c 869static DEFINE_PCI_DEVICE_TABLE(rsxx_pci_ids) = {
9bb3c446
PK		 870 {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS70_FLASH)},
871 {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS80_FLASH)},
8722ff8c 872 {0,},
873};
874
875MODULE_DEVICE_TABLE(pci, rsxx_pci_ids);
876
877static struct pci_driver rsxx_pci_driver = {
878 .name = DRIVER_NAME,
879 .id_table = rsxx_pci_ids,
880 .probe = rsxx_pci_probe,
82bed4d5 881 .remove = rsxx_pci_remove,
8722ff8c 882 .suspend = rsxx_pci_suspend,
883 .shutdown = rsxx_pci_shutdown,
c95246c3 884 .err_handler = &rsxx_err_handler,
8722ff8c 885};
886
887static int __init rsxx_core_init(void)
888{
889 int st;
890
891 st = rsxx_dev_init();
892 if (st)
893 return st;
894
895 st = rsxx_dma_init();
896 if (st)
897 goto dma_init_failed;
898
899 st = rsxx_creg_init();
900 if (st)
901 goto creg_init_failed;
902
903 return pci_register_driver(&rsxx_pci_driver);
904
905creg_init_failed:
906 rsxx_dma_cleanup();
907dma_init_failed:
908 rsxx_dev_cleanup();
909
910 return st;
911}
912
913static void __exit rsxx_core_cleanup(void)
914{
915 pci_unregister_driver(&rsxx_pci_driver);
916 rsxx_creg_cleanup();
917 rsxx_dma_cleanup();
918 rsxx_dev_cleanup();
919}
920
921module_init(rsxx_core_init);
922module_exit(rsxx_core_cleanup);
Linux 6.x block layer and io_uring tree(s)