]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blame - drivers/block/rsxx/core.c
projects / mirror_ubuntu-hirsute-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge remote-tracking branch 'regulator/topic/palmas' into v3.9-rc8
[mirror_ubuntu-hirsute-kernel.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
42
9bb3c446
PK		 43MODULE_DESCRIPTION("IBM FlashSystem 70/80 PCIe SSD Device Driver");
44MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM");
8722ff8c 45MODULE_LICENSE("GPL");
46MODULE_VERSION(DRIVER_VERSION);
47
48static unsigned int force_legacy = NO_LEGACY;
49module_param(force_legacy, uint, 0444);
50MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts");
51
52static DEFINE_IDA(rsxx_disk_ida);
53static DEFINE_SPINLOCK(rsxx_ida_lock);
54
55/*----------------- Interrupt Control & Handling -------------------*/
c95246c3
PK		 56
57static void rsxx_mask_interrupts(struct rsxx_cardinfo *card)
58{
59 card->isr_mask = 0;
60 card->ier_mask = 0;
61}
62
8722ff8c 63static void __enable_intr(unsigned int *mask, unsigned int intr)
64{
65 *mask |= intr;
66}
67
68static void __disable_intr(unsigned int *mask, unsigned int intr)
69{
70 *mask &= ~intr;
71}
72
73/*
74 * NOTE: Disabling the IER will disable the hardware interrupt.
75 * Disabling the ISR will disable the software handling of the ISR bit.
76 *
77 * Enable/Disable interrupt functions assume the card->irq_lock
78 * is held by the caller.
79 */
80void rsxx_enable_ier(struct rsxx_cardinfo *card, unsigned int intr)
81{
c95246c3
PK		 82 if (unlikely(card->halt) ||
83 unlikely(card->eeh_state))
8722ff8c 84 return;
85
86 __enable_intr(&card->ier_mask, intr);
87 iowrite32(card->ier_mask, card->regmap + IER);
88}
89
90void rsxx_disable_ier(struct rsxx_cardinfo *card, unsigned int intr)
91{
c95246c3
PK		 92 if (unlikely(card->eeh_state))
93 return;
94
8722ff8c 95 __disable_intr(&card->ier_mask, intr);
96 iowrite32(card->ier_mask, card->regmap + IER);
97}
98
99void rsxx_enable_ier_and_isr(struct rsxx_cardinfo *card,
100 unsigned int intr)
101{
c95246c3
PK		 102 if (unlikely(card->halt) ||
103 unlikely(card->eeh_state))
8722ff8c 104 return;
105
106 __enable_intr(&card->isr_mask, intr);
107 __enable_intr(&card->ier_mask, intr);
108 iowrite32(card->ier_mask, card->regmap + IER);
109}
110void rsxx_disable_ier_and_isr(struct rsxx_cardinfo *card,
111 unsigned int intr)
112{
c95246c3
PK		 113 if (unlikely(card->eeh_state))
114 return;
115
8722ff8c 116 __disable_intr(&card->isr_mask, intr);
117 __disable_intr(&card->ier_mask, intr);
118 iowrite32(card->ier_mask, card->regmap + IER);
119}
120
c206c709 121static irqreturn_t rsxx_isr(int irq, void *pdata)
8722ff8c 122{
c206c709 123 struct rsxx_cardinfo *card = pdata;
8722ff8c 124 unsigned int isr;
125 int handled = 0;
126 int reread_isr;
127 int i;
128
129 spin_lock(&card->irq_lock);
130
131 do {
132 reread_isr = 0;
133
c95246c3
PK		 134 if (unlikely(card->eeh_state))
135 break;
136
8722ff8c 137 isr = ioread32(card->regmap + ISR);
138 if (isr == 0xffffffff) {
139 /*
140 * A few systems seem to have an intermittent issue
141 * where PCI reads return all Fs, but retrying the read
142 * a little later will return as expected.
143 */
144 dev_info(CARD_TO_DEV(card),
145 "ISR = 0xFFFFFFFF, retrying later\n");
146 break;
147 }
148
149 isr &= card->isr_mask;
150 if (!isr)
151 break;
152
153 for (i = 0; i < card->n_targets; i++) {
154 if (isr & CR_INTR_DMA(i)) {
155 if (card->ier_mask & CR_INTR_DMA(i)) {
156 rsxx_disable_ier(card, CR_INTR_DMA(i));
157 reread_isr = 1;
158 }
159 queue_work(card->ctrl[i].done_wq,
160 &card->ctrl[i].dma_done_work);
161 handled++;
162 }
163 }
164
165 if (isr & CR_INTR_CREG) {
166 schedule_work(&card->creg_ctrl.done_work);
167 handled++;
168 }
169
170 if (isr & CR_INTR_EVENT) {
171 schedule_work(&card->event_work);
172 rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
173 handled++;
174 }
175 } while (reread_isr);
176
177 spin_unlock(&card->irq_lock);
178
179 return handled ? IRQ_HANDLED : IRQ_NONE;
180}
181
182/*----------------- Card Event Handler -------------------*/
f3791203 183static const char * const rsxx_card_state_to_str(unsigned int state)
c206c709 184{
f3791203 185 static const char * const state_strings[] = {
c206c709
PK		 186 "Unknown", "Shutdown", "Starting", "Formatting",
187 "Uninitialized", "Good", "Shutting Down",
188 "Fault", "Read Only Fault", "dStroying"
189 };
190
191 return state_strings[ffs(state)];
192}
193
8722ff8c 194static void card_state_change(struct rsxx_cardinfo *card,
195 unsigned int new_state)
196{
197 int st;
198
199 dev_info(CARD_TO_DEV(card),
200 "card state change detected.(%s -> %s)\n",
201 rsxx_card_state_to_str(card->state),
202 rsxx_card_state_to_str(new_state));
203
204 card->state = new_state;
205
206 /* Don't attach DMA interfaces if the card has an invalid config */
207 if (!card->config_valid)
208 return;
209
210 switch (new_state) {
211 case CARD_STATE_RD_ONLY_FAULT:
212 dev_crit(CARD_TO_DEV(card),
213 "Hardware has entered read-only mode!\n");
214 /*
215 * Fall through so the DMA devices can be attached and
216 * the user can attempt to pull off their data.
217 */
218 case CARD_STATE_GOOD:
219 st = rsxx_get_card_size8(card, &card->size8);
220 if (st)
221 dev_err(CARD_TO_DEV(card),
222 "Failed attaching DMA devices\n");
223
224 if (card->config_valid)
225 set_capacity(card->gendisk, card->size8 >> 9);
226 break;
227
228 case CARD_STATE_FAULT:
229 dev_crit(CARD_TO_DEV(card),
230 "Hardware Fault reported!\n");
231 /* Fall through. */
232
233 /* Everything else, detach DMA interface if it's attached. */
234 case CARD_STATE_SHUTDOWN:
235 case CARD_STATE_STARTING:
236 case CARD_STATE_FORMATTING:
237 case CARD_STATE_UNINITIALIZED:
238 case CARD_STATE_SHUTTING_DOWN:
239 /*
240 * dStroy is a term coined by marketing to represent the low level
241 * secure erase.
242 */
243 case CARD_STATE_DSTROYING:
244 set_capacity(card->gendisk, 0);
245 break;
246 }
247}
248
249static void card_event_handler(struct work_struct *work)
250{
251 struct rsxx_cardinfo *card;
252 unsigned int state;
253 unsigned long flags;
254 int st;
255
256 card = container_of(work, struct rsxx_cardinfo, event_work);
257
258 if (unlikely(card->halt))
259 return;
260
261 /*
262 * Enable the interrupt now to avoid any weird race conditions where a
263 * state change might occur while rsxx_get_card_state() is
264 * processing a returned creg cmd.
265 */
266 spin_lock_irqsave(&card->irq_lock, flags);
267 rsxx_enable_ier_and_isr(card, CR_INTR_EVENT);
268 spin_unlock_irqrestore(&card->irq_lock, flags);
269
270 st = rsxx_get_card_state(card, &state);
271 if (st) {
272 dev_info(CARD_TO_DEV(card),
273 "Failed reading state after event.\n");
274 return;
275 }
276
277 if (card->state != state)
278 card_state_change(card, state);
279
280 if (card->creg_ctrl.creg_stats.stat & CREG_STAT_LOG_PENDING)
281 rsxx_read_hw_log(card);
282}
283
8722ff8c 284/*----------------- Card Operations -------------------*/
285static int card_shutdown(struct rsxx_cardinfo *card)
286{
287 unsigned int state;
288 signed long start;
289 const int timeout = msecs_to_jiffies(120000);
290 int st;
291
292 /* We can't issue a shutdown if the card is in a transition state */
293 start = jiffies;
294 do {
295 st = rsxx_get_card_state(card, &state);
296 if (st)
297 return st;
298 } while (state == CARD_STATE_STARTING &&
299 (jiffies - start < timeout));
300
301 if (state == CARD_STATE_STARTING)
302 return -ETIMEDOUT;
303
304 /* Only issue a shutdown if we need to */
305 if ((state != CARD_STATE_SHUTTING_DOWN) &&
306 (state != CARD_STATE_SHUTDOWN)) {
307 st = rsxx_issue_card_cmd(card, CARD_CMD_SHUTDOWN);
308 if (st)
309 return st;
310 }
311
312 start = jiffies;
313 do {
314 st = rsxx_get_card_state(card, &state);
315 if (st)
316 return st;
317 } while (state != CARD_STATE_SHUTDOWN &&
318 (jiffies - start < timeout));
319
320 if (state != CARD_STATE_SHUTDOWN)
321 return -ETIMEDOUT;
322
323 return 0;
324}
325
4dcaf472 326static int rsxx_eeh_frozen(struct pci_dev *dev)
c95246c3
PK		 327{
328 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
329 int i;
4dcaf472 330 int st;
c95246c3
PK		 331
332 dev_warn(&dev->dev, "IBM FlashSystem PCI: preparing for slot reset.\n");
333
334 card->eeh_state = 1;
335 rsxx_mask_interrupts(card);
336
337 /*
338 * We need to guarantee that the write for eeh_state and masking
339 * interrupts does not become reordered. This will prevent a possible
340 * race condition with the EEH code.
341 */
342 wmb();
343
344 pci_disable_device(dev);
345
4dcaf472
PK		 346 st = rsxx_eeh_save_issued_dmas(card);
347 if (st)
348 return st;
c95246c3
PK		 349
350 rsxx_eeh_save_issued_creg(card);
351
352 for (i = 0; i < card->n_targets; i++) {
353 if (card->ctrl[i].status.buf)
354 pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
355 card->ctrl[i].status.buf,
356 card->ctrl[i].status.dma_addr);
357 if (card->ctrl[i].cmd.buf)
358 pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8,
359 card->ctrl[i].cmd.buf,
360 card->ctrl[i].cmd.dma_addr);
361 }
4dcaf472
PK		 362
363 return 0;
c95246c3
PK		 364}
365
366static void rsxx_eeh_failure(struct pci_dev *dev)
367{
368 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
369 int i;
370
371 dev_err(&dev->dev, "IBM FlashSystem PCI: disabling failed card.\n");
372
373 card->eeh_state = 1;
374
375 for (i = 0; i < card->n_targets; i++)
376 del_timer_sync(&card->ctrl[i].activity_timer);
377
378 rsxx_eeh_cancel_dmas(card);
379}
380
381static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card)
382{
383 unsigned int status;
384 int iter = 0;
385
386 /* We need to wait for the hardware to reset */
387 while (iter++ < 10) {
388 status = ioread32(card->regmap + PCI_RECONFIG);
389
390 if (status & RSXX_FLUSH_BUSY) {
391 ssleep(1);
392 continue;
393 }
394
395 if (status & RSXX_FLUSH_TIMEOUT)
396 dev_warn(CARD_TO_DEV(card), "HW: flash controller timeout\n");
397 return 0;
398 }
399
400 /* Hardware failed resetting itself. */
401 return -1;
402}
403
404static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev,
405 enum pci_channel_state error)
406{
4dcaf472
PK		 407 int st;
408
c95246c3
PK		 409 if (dev->revision < RSXX_EEH_SUPPORT)
410 return PCI_ERS_RESULT_NONE;
411
412 if (error == pci_channel_io_perm_failure) {
413 rsxx_eeh_failure(dev);
414 return PCI_ERS_RESULT_DISCONNECT;
415 }
416
4dcaf472
PK		 417 st = rsxx_eeh_frozen(dev);
418 if (st) {
419 dev_err(&dev->dev, "Slot reset setup failed\n");
420 rsxx_eeh_failure(dev);
421 return PCI_ERS_RESULT_DISCONNECT;
422 }
423
c95246c3
PK		 424 return PCI_ERS_RESULT_NEED_RESET;
425}
426
427static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev)
428{
429 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
430 unsigned long flags;
431 int i;
432 int st;
433
434 dev_warn(&dev->dev,
435 "IBM FlashSystem PCI: recovering from slot reset.\n");
436
437 st = pci_enable_device(dev);
438 if (st)
439 goto failed_hw_setup;
440
441 pci_set_master(dev);
442
443 st = rsxx_eeh_fifo_flush_poll(card);
444 if (st)
445 goto failed_hw_setup;
446
447 rsxx_dma_queue_reset(card);
448
449 for (i = 0; i < card->n_targets; i++) {
450 st = rsxx_hw_buffers_init(dev, &card->ctrl[i]);
451 if (st)
452 goto failed_hw_buffers_init;
453 }
454
455 if (card->config_valid)
456 rsxx_dma_configure(card);
457
458 /* Clears the ISR register from spurious interrupts */
459 st = ioread32(card->regmap + ISR);
460
461 card->eeh_state = 0;
462
463 st = rsxx_eeh_remap_dmas(card);
464 if (st)
465 goto failed_remap_dmas;
466
467 spin_lock_irqsave(&card->irq_lock, flags);
468 if (card->n_targets & RSXX_MAX_TARGETS)
469 rsxx_enable_ier_and_isr(card, CR_INTR_ALL_G);
470 else
471 rsxx_enable_ier_and_isr(card, CR_INTR_ALL_C);
472 spin_unlock_irqrestore(&card->irq_lock, flags);
473
474 rsxx_kick_creg_queue(card);
475
476 for (i = 0; i < card->n_targets; i++) {
477 spin_lock(&card->ctrl[i].queue_lock);
478 if (list_empty(&card->ctrl[i].queue)) {
479 spin_unlock(&card->ctrl[i].queue_lock);
480 continue;
481 }
482 spin_unlock(&card->ctrl[i].queue_lock);
483
484 queue_work(card->ctrl[i].issue_wq,
485 &card->ctrl[i].issue_dma_work);
486 }
487
488 dev_info(&dev->dev, "IBM FlashSystem PCI: recovery complete.\n");
489
490 return PCI_ERS_RESULT_RECOVERED;
491
492failed_hw_buffers_init:
493failed_remap_dmas:
494 for (i = 0; i < card->n_targets; i++) {
495 if (card->ctrl[i].status.buf)
496 pci_free_consistent(card->dev,
497 STATUS_BUFFER_SIZE8,
498 card->ctrl[i].status.buf,
499 card->ctrl[i].status.dma_addr);
500 if (card->ctrl[i].cmd.buf)
501 pci_free_consistent(card->dev,
502 COMMAND_BUFFER_SIZE8,
503 card->ctrl[i].cmd.buf,
504 card->ctrl[i].cmd.dma_addr);
505 }
506failed_hw_setup:
507 rsxx_eeh_failure(dev);
508 return PCI_ERS_RESULT_DISCONNECT;
509
510}
511
8722ff8c 512/*----------------- Driver Initialization & Setup -------------------*/
513/* Returns: 0 if the driver is compatible with the device
514 -1 if the driver is NOT compatible with the device */
515static int rsxx_compatibility_check(struct rsxx_cardinfo *card)
516{
517 unsigned char pci_rev;
518
519 pci_read_config_byte(card->dev, PCI_REVISION_ID, &pci_rev);
520
521 if (pci_rev > RS70_PCI_REV_SUPPORTED)
522 return -1;
523 return 0;
524}
525
82bed4d5 526static int rsxx_pci_probe(struct pci_dev *dev,
8722ff8c 527 const struct pci_device_id *id)
528{
529 struct rsxx_cardinfo *card;
8722ff8c 530 int st;
531
532 dev_info(&dev->dev, "PCI-Flash SSD discovered\n");
533
534 card = kzalloc(sizeof(*card), GFP_KERNEL);
535 if (!card)
536 return -ENOMEM;
537
538 card->dev = dev;
539 pci_set_drvdata(dev, card);
540
541 do {
542 if (!ida_pre_get(&rsxx_disk_ida, GFP_KERNEL)) {
543 st = -ENOMEM;
544 goto failed_ida_get;
545 }
546
547 spin_lock(&rsxx_ida_lock);
548 st = ida_get_new(&rsxx_disk_ida, &card->disk_id);
549 spin_unlock(&rsxx_ida_lock);
550 } while (st == -EAGAIN);
551
552 if (st)
553 goto failed_ida_get;
554
555 st = pci_enable_device(dev);
556 if (st)
557 goto failed_enable;
558
559 pci_set_master(dev);
560 pci_set_dma_max_seg_size(dev, RSXX_HW_BLK_SIZE);
561
562 st = pci_set_dma_mask(dev, DMA_BIT_MASK(64));
563 if (st) {
564 dev_err(CARD_TO_DEV(card),
565 "No usable DMA configuration,aborting\n");
566 goto failed_dma_mask;
567 }
568
569 st = pci_request_regions(dev, DRIVER_NAME);
570 if (st) {
571 dev_err(CARD_TO_DEV(card),
572 "Failed to request memory region\n");
573 goto failed_request_regions;
574 }
575
576 if (pci_resource_len(dev, 0) == 0) {
577 dev_err(CARD_TO_DEV(card), "BAR0 has length 0!\n");
578 st = -ENOMEM;
579 goto failed_iomap;
580 }
581
582 card->regmap = pci_iomap(dev, 0, 0);
583 if (!card->regmap) {
584 dev_err(CARD_TO_DEV(card), "Failed to map BAR0\n");
585 st = -ENOMEM;
586 goto failed_iomap;
587 }
588
589 spin_lock_init(&card->irq_lock);
590 card->halt = 0;
c95246c3 591 card->eeh_state = 0;
8722ff8c 592
c206c709 593 spin_lock_irq(&card->irq_lock);
8722ff8c 594 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
c206c709 595 spin_unlock_irq(&card->irq_lock);
8722ff8c 596
597 if (!force_legacy) {
598 st = pci_enable_msi(dev);
599 if (st)
600 dev_warn(CARD_TO_DEV(card),
601 "Failed to enable MSI\n");
602 }
603
604 st = request_irq(dev->irq, rsxx_isr, IRQF_DISABLED | IRQF_SHARED,
605 DRIVER_NAME, card);
606 if (st) {
607 dev_err(CARD_TO_DEV(card),
608 "Failed requesting IRQ%d\n", dev->irq);
609 goto failed_irq;
610 }
611
612 /************* Setup Processor Command Interface *************/
613 rsxx_creg_setup(card);
614
c206c709 615 spin_lock_irq(&card->irq_lock);
8722ff8c 616 rsxx_enable_ier_and_isr(card, CR_INTR_CREG);
c206c709 617 spin_unlock_irq(&card->irq_lock);
8722ff8c 618
619 st = rsxx_compatibility_check(card);
620 if (st) {
621 dev_warn(CARD_TO_DEV(card),
622 "Incompatible driver detected. Please update the driver.\n");
623 st = -EINVAL;
624 goto failed_compatiblity_check;
625 }
626
627 /************* Load Card Config *************/
628 st = rsxx_load_config(card);
629 if (st)
630 dev_err(CARD_TO_DEV(card),
631 "Failed loading card config\n");
632
633 /************* Setup DMA Engine *************/
634 st = rsxx_get_num_targets(card, &card->n_targets);
635 if (st)
636 dev_info(CARD_TO_DEV(card),
637 "Failed reading the number of DMA targets\n");
638
639 card->ctrl = kzalloc(card->n_targets * sizeof(*card->ctrl), GFP_KERNEL);
640 if (!card->ctrl) {
641 st = -ENOMEM;
642 goto failed_dma_setup;
643 }
644
645 st = rsxx_dma_setup(card);
646 if (st) {
647 dev_info(CARD_TO_DEV(card),
648 "Failed to setup DMA engine\n");
649 goto failed_dma_setup;
650 }
651
652 /************* Setup Card Event Handler *************/
653 INIT_WORK(&card->event_work, card_event_handler);
654
655 st = rsxx_setup_dev(card);
656 if (st)
657 goto failed_create_dev;
658
659 rsxx_get_card_state(card, &card->state);
660
661 dev_info(CARD_TO_DEV(card),
662 "card state: %s\n",
663 rsxx_card_state_to_str(card->state));
664
665 /*
666 * Now that the DMA Engine and devices have been setup,
667 * we can enable the event interrupt(it kicks off actions in
668 * those layers so we couldn't enable it right away.)
669 */
c206c709 670 spin_lock_irq(&card->irq_lock);
8722ff8c 671 rsxx_enable_ier_and_isr(card, CR_INTR_EVENT);
c206c709 672 spin_unlock_irq(&card->irq_lock);
8722ff8c 673
674 if (card->state == CARD_STATE_SHUTDOWN) {
675 st = rsxx_issue_card_cmd(card, CARD_CMD_STARTUP);
676 if (st)
677 dev_crit(CARD_TO_DEV(card),
678 "Failed issuing card startup\n");
679 } else if (card->state == CARD_STATE_GOOD ||
680 card->state == CARD_STATE_RD_ONLY_FAULT) {
681 st = rsxx_get_card_size8(card, &card->size8);
682 if (st)
683 card->size8 = 0;
684 }
685
686 rsxx_attach_dev(card);
687
688 return 0;
689
690failed_create_dev:
691 rsxx_dma_destroy(card);
692failed_dma_setup:
693failed_compatiblity_check:
c206c709 694 spin_lock_irq(&card->irq_lock);
8722ff8c 695 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
c206c709 696 spin_unlock_irq(&card->irq_lock);
8722ff8c 697 free_irq(dev->irq, card);
698 if (!force_legacy)
699 pci_disable_msi(dev);
700failed_irq:
701 pci_iounmap(dev, card->regmap);
702failed_iomap:
703 pci_release_regions(dev);
704failed_request_regions:
705failed_dma_mask:
706 pci_disable_device(dev);
707failed_enable:
708 spin_lock(&rsxx_ida_lock);
709 ida_remove(&rsxx_disk_ida, card->disk_id);
710 spin_unlock(&rsxx_ida_lock);
711failed_ida_get:
712 kfree(card);
713
714 return st;
715}
716
82bed4d5 717static void rsxx_pci_remove(struct pci_dev *dev)
8722ff8c 718{
719 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
720 unsigned long flags;
721 int st;
722 int i;
723
724 if (!card)
725 return;
726
727 dev_info(CARD_TO_DEV(card),
728 "Removing PCI-Flash SSD.\n");
729
730 rsxx_detach_dev(card);
731
732 for (i = 0; i < card->n_targets; i++) {
733 spin_lock_irqsave(&card->irq_lock, flags);
734 rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i));
735 spin_unlock_irqrestore(&card->irq_lock, flags);
736 }
737
738 st = card_shutdown(card);
739 if (st)
740 dev_crit(CARD_TO_DEV(card), "Shutdown failed!\n");
741
742 /* Sync outstanding event handlers. */
743 spin_lock_irqsave(&card->irq_lock, flags);
744 rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
745 spin_unlock_irqrestore(&card->irq_lock, flags);
746
8722ff8c 747 cancel_work_sync(&card->event_work);
748
749 rsxx_destroy_dev(card);
750 rsxx_dma_destroy(card);
751
752 spin_lock_irqsave(&card->irq_lock, flags);
753 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
754 spin_unlock_irqrestore(&card->irq_lock, flags);
1ebfd109
PK		 755
756 /* Prevent work_structs from re-queuing themselves. */
757 card->halt = 1;
758
8722ff8c 759 free_irq(dev->irq, card);
760
761 if (!force_legacy)
762 pci_disable_msi(dev);
763
764 rsxx_creg_destroy(card);
765
766 pci_iounmap(dev, card->regmap);
767
768 pci_disable_device(dev);
769 pci_release_regions(dev);
770
771 kfree(card);
772}
773
774static int rsxx_pci_suspend(struct pci_dev *dev, pm_message_t state)
775{
776 /* We don't support suspend at this time. */
777 return -ENOSYS;
778}
779
780static void rsxx_pci_shutdown(struct pci_dev *dev)
781{
782 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
783 unsigned long flags;
784 int i;
785
786 if (!card)
787 return;
788
789 dev_info(CARD_TO_DEV(card), "Shutting down PCI-Flash SSD.\n");
790
791 rsxx_detach_dev(card);
792
793 for (i = 0; i < card->n_targets; i++) {
794 spin_lock_irqsave(&card->irq_lock, flags);
795 rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i));
796 spin_unlock_irqrestore(&card->irq_lock, flags);
797 }
798
799 card_shutdown(card);
800}
801
c95246c3
PK		 802static const struct pci_error_handlers rsxx_err_handler = {
803 .error_detected = rsxx_error_detected,
804 .slot_reset = rsxx_slot_reset,
805};
806
8722ff8c 807static DEFINE_PCI_DEVICE_TABLE(rsxx_pci_ids) = {
9bb3c446
PK		 808 {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS70_FLASH)},
809 {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS80_FLASH)},
8722ff8c 810 {0,},
811};
812
813MODULE_DEVICE_TABLE(pci, rsxx_pci_ids);
814
815static struct pci_driver rsxx_pci_driver = {
816 .name = DRIVER_NAME,
817 .id_table = rsxx_pci_ids,
818 .probe = rsxx_pci_probe,
82bed4d5 819 .remove = rsxx_pci_remove,
8722ff8c 820 .suspend = rsxx_pci_suspend,
821 .shutdown = rsxx_pci_shutdown,
c95246c3 822 .err_handler = &rsxx_err_handler,
8722ff8c 823};
824
825static int __init rsxx_core_init(void)
826{
827 int st;
828
829 st = rsxx_dev_init();
830 if (st)
831 return st;
832
833 st = rsxx_dma_init();
834 if (st)
835 goto dma_init_failed;
836
837 st = rsxx_creg_init();
838 if (st)
839 goto creg_init_failed;
840
841 return pci_register_driver(&rsxx_pci_driver);
842
843creg_init_failed:
844 rsxx_dma_cleanup();
845dma_init_failed:
846 rsxx_dev_cleanup();
847
848 return st;
849}
850
851static void __exit rsxx_core_cleanup(void)
852{
853 pci_unregister_driver(&rsxx_pci_driver);
854 rsxx_creg_cleanup();
855 rsxx_dma_cleanup();
856 rsxx_dev_cleanup();
857}
858
859module_init(rsxx_core_init);
860module_exit(rsxx_core_cleanup);
Ubuntu Hirsute Linux kernel mirror