5 * Authors: Joshua Morris <josh.h.morris@us.ibm.com>
6 * Philip Kelleher <pjk1939@linux.vnet.ibm.com>
8 * (C) Copyright 2013 IBM Corporation
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.
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.
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
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>
33 #include <linux/delay.h>
34 #include <linux/debugfs.h>
35 #include <linux/seq_file.h>
37 #include <linux/genhd.h>
38 #include <linux/idr.h>
40 #include "rsxx_priv.h"
44 #define SYNC_START_TIMEOUT (10 * 60) /* 10 minutes */
46 MODULE_DESCRIPTION("IBM Flash Adapter 900GB Full Height Device Driver");
47 MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM");
48 MODULE_LICENSE("GPL");
49 MODULE_VERSION(DRIVER_VERSION);
51 static unsigned int force_legacy = NO_LEGACY;
52 module_param(force_legacy, uint, 0444);
53 MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts");
55 static unsigned int sync_start = 1;
56 module_param(sync_start, uint, 0444);
57 MODULE_PARM_DESC(sync_start, "On by Default: Driver load will not complete "
58 "until the card startup has completed.");
60 static DEFINE_IDA(rsxx_disk_ida);
61 static DEFINE_SPINLOCK(rsxx_ida_lock);
63 /* --------------------Debugfs Setup ------------------- */
71 static int rsxx_attr_pci_regs_show(struct seq_file *m, void *p)
73 struct rsxx_cardinfo *card = m->private;
75 seq_printf(m, "HWID 0x%08x\n",
76 ioread32(card->regmap + HWID));
77 seq_printf(m, "SCRATCH 0x%08x\n",
78 ioread32(card->regmap + SCRATCH));
79 seq_printf(m, "IER 0x%08x\n",
80 ioread32(card->regmap + IER));
81 seq_printf(m, "IPR 0x%08x\n",
82 ioread32(card->regmap + IPR));
83 seq_printf(m, "CREG_CMD 0x%08x\n",
84 ioread32(card->regmap + CREG_CMD));
85 seq_printf(m, "CREG_ADD 0x%08x\n",
86 ioread32(card->regmap + CREG_ADD));
87 seq_printf(m, "CREG_CNT 0x%08x\n",
88 ioread32(card->regmap + CREG_CNT));
89 seq_printf(m, "CREG_STAT 0x%08x\n",
90 ioread32(card->regmap + CREG_STAT));
91 seq_printf(m, "CREG_DATA0 0x%08x\n",
92 ioread32(card->regmap + CREG_DATA0));
93 seq_printf(m, "CREG_DATA1 0x%08x\n",
94 ioread32(card->regmap + CREG_DATA1));
95 seq_printf(m, "CREG_DATA2 0x%08x\n",
96 ioread32(card->regmap + CREG_DATA2));
97 seq_printf(m, "CREG_DATA3 0x%08x\n",
98 ioread32(card->regmap + CREG_DATA3));
99 seq_printf(m, "CREG_DATA4 0x%08x\n",
100 ioread32(card->regmap + CREG_DATA4));
101 seq_printf(m, "CREG_DATA5 0x%08x\n",
102 ioread32(card->regmap + CREG_DATA5));
103 seq_printf(m, "CREG_DATA6 0x%08x\n",
104 ioread32(card->regmap + CREG_DATA6));
105 seq_printf(m, "CREG_DATA7 0x%08x\n",
106 ioread32(card->regmap + CREG_DATA7));
107 seq_printf(m, "INTR_COAL 0x%08x\n",
108 ioread32(card->regmap + INTR_COAL));
109 seq_printf(m, "HW_ERROR 0x%08x\n",
110 ioread32(card->regmap + HW_ERROR));
111 seq_printf(m, "DEBUG0 0x%08x\n",
112 ioread32(card->regmap + PCI_DEBUG0));
113 seq_printf(m, "DEBUG1 0x%08x\n",
114 ioread32(card->regmap + PCI_DEBUG1));
115 seq_printf(m, "DEBUG2 0x%08x\n",
116 ioread32(card->regmap + PCI_DEBUG2));
117 seq_printf(m, "DEBUG3 0x%08x\n",
118 ioread32(card->regmap + PCI_DEBUG3));
119 seq_printf(m, "DEBUG4 0x%08x\n",
120 ioread32(card->regmap + PCI_DEBUG4));
121 seq_printf(m, "DEBUG5 0x%08x\n",
122 ioread32(card->regmap + PCI_DEBUG5));
123 seq_printf(m, "DEBUG6 0x%08x\n",
124 ioread32(card->regmap + PCI_DEBUG6));
125 seq_printf(m, "DEBUG7 0x%08x\n",
126 ioread32(card->regmap + PCI_DEBUG7));
127 seq_printf(m, "RECONFIG 0x%08x\n",
128 ioread32(card->regmap + PCI_RECONFIG));
133 static int rsxx_attr_stats_show(struct seq_file *m, void *p)
135 struct rsxx_cardinfo *card = m->private;
138 for (i = 0; i < card->n_targets; i++) {
139 seq_printf(m, "Ctrl %d CRC Errors = %d\n",
140 i, card->ctrl[i].stats.crc_errors);
141 seq_printf(m, "Ctrl %d Hard Errors = %d\n",
142 i, card->ctrl[i].stats.hard_errors);
143 seq_printf(m, "Ctrl %d Soft Errors = %d\n",
144 i, card->ctrl[i].stats.soft_errors);
145 seq_printf(m, "Ctrl %d Writes Issued = %d\n",
146 i, card->ctrl[i].stats.writes_issued);
147 seq_printf(m, "Ctrl %d Writes Failed = %d\n",
148 i, card->ctrl[i].stats.writes_failed);
149 seq_printf(m, "Ctrl %d Reads Issued = %d\n",
150 i, card->ctrl[i].stats.reads_issued);
151 seq_printf(m, "Ctrl %d Reads Failed = %d\n",
152 i, card->ctrl[i].stats.reads_failed);
153 seq_printf(m, "Ctrl %d Reads Retried = %d\n",
154 i, card->ctrl[i].stats.reads_retried);
155 seq_printf(m, "Ctrl %d Discards Issued = %d\n",
156 i, card->ctrl[i].stats.discards_issued);
157 seq_printf(m, "Ctrl %d Discards Failed = %d\n",
158 i, card->ctrl[i].stats.discards_failed);
159 seq_printf(m, "Ctrl %d DMA SW Errors = %d\n",
160 i, card->ctrl[i].stats.dma_sw_err);
161 seq_printf(m, "Ctrl %d DMA HW Faults = %d\n",
162 i, card->ctrl[i].stats.dma_hw_fault);
163 seq_printf(m, "Ctrl %d DMAs Cancelled = %d\n",
164 i, card->ctrl[i].stats.dma_cancelled);
165 seq_printf(m, "Ctrl %d SW Queue Depth = %d\n",
166 i, card->ctrl[i].stats.sw_q_depth);
167 seq_printf(m, "Ctrl %d HW Queue Depth = %d\n",
168 i, atomic_read(&card->ctrl[i].stats.hw_q_depth));
174 static int rsxx_attr_stats_open(struct inode *inode, struct file *file)
176 return single_open(file, rsxx_attr_stats_show, inode->i_private);
179 static int rsxx_attr_pci_regs_open(struct inode *inode, struct file *file)
181 return single_open(file, rsxx_attr_pci_regs_show, inode->i_private);
184 static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf,
185 size_t cnt, loff_t *ppos)
187 struct rsxx_cram *info = fp->private_data;
188 struct rsxx_cardinfo *card = info->i_private;
192 buf = kzalloc(sizeof(*buf) * cnt, GFP_KERNEL);
196 info->f_pos = (u32)*ppos + info->offset;
198 st = rsxx_creg_read(card, CREG_ADD_CRAM + info->f_pos, cnt, buf, 1);
202 st = copy_to_user(ubuf, buf, cnt);
213 static ssize_t rsxx_cram_write(struct file *fp, const char __user *ubuf,
214 size_t cnt, loff_t *ppos)
216 struct rsxx_cram *info = fp->private_data;
217 struct rsxx_cardinfo *card = info->i_private;
221 buf = kzalloc(sizeof(*buf) * cnt, GFP_KERNEL);
225 st = copy_from_user(buf, ubuf, cnt);
229 info->f_pos = (u32)*ppos + info->offset;
231 st = rsxx_creg_write(card, CREG_ADD_CRAM + info->f_pos, cnt, buf, 1);
242 static int rsxx_cram_open(struct inode *inode, struct file *file)
244 struct rsxx_cram *info = kzalloc(sizeof(*info), GFP_KERNEL);
248 info->i_private = inode->i_private;
249 info->f_pos = file->f_pos;
250 file->private_data = info;
255 static int rsxx_cram_release(struct inode *inode, struct file *file)
257 struct rsxx_cram *info = file->private_data;
263 file->private_data = NULL;
268 static const struct file_operations debugfs_cram_fops = {
269 .owner = THIS_MODULE,
270 .open = rsxx_cram_open,
271 .read = rsxx_cram_read,
272 .write = rsxx_cram_write,
273 .release = rsxx_cram_release,
276 static const struct file_operations debugfs_stats_fops = {
277 .owner = THIS_MODULE,
278 .open = rsxx_attr_stats_open,
281 .release = single_release,
284 static const struct file_operations debugfs_pci_regs_fops = {
285 .owner = THIS_MODULE,
286 .open = rsxx_attr_pci_regs_open,
289 .release = single_release,
292 static void rsxx_debugfs_dev_new(struct rsxx_cardinfo *card)
294 struct dentry *debugfs_stats;
295 struct dentry *debugfs_pci_regs;
296 struct dentry *debugfs_cram;
298 card->debugfs_dir = debugfs_create_dir(card->gendisk->disk_name, NULL);
299 if (IS_ERR_OR_NULL(card->debugfs_dir))
300 goto failed_debugfs_dir;
302 debugfs_stats = debugfs_create_file("stats", S_IRUGO,
303 card->debugfs_dir, card,
304 &debugfs_stats_fops);
305 if (IS_ERR_OR_NULL(debugfs_stats))
306 goto failed_debugfs_stats;
308 debugfs_pci_regs = debugfs_create_file("pci_regs", S_IRUGO,
309 card->debugfs_dir, card,
310 &debugfs_pci_regs_fops);
311 if (IS_ERR_OR_NULL(debugfs_pci_regs))
312 goto failed_debugfs_pci_regs;
314 debugfs_cram = debugfs_create_file("cram", S_IRUGO | S_IWUSR,
315 card->debugfs_dir, card,
317 if (IS_ERR_OR_NULL(debugfs_cram))
318 goto failed_debugfs_cram;
322 debugfs_remove(debugfs_pci_regs);
323 failed_debugfs_pci_regs:
324 debugfs_remove(debugfs_stats);
325 failed_debugfs_stats:
326 debugfs_remove(card->debugfs_dir);
328 card->debugfs_dir = NULL;
331 /*----------------- Interrupt Control & Handling -------------------*/
333 static void rsxx_mask_interrupts(struct rsxx_cardinfo *card)
339 static void __enable_intr(unsigned int *mask, unsigned int intr)
344 static void __disable_intr(unsigned int *mask, unsigned int intr)
350 * NOTE: Disabling the IER will disable the hardware interrupt.
351 * Disabling the ISR will disable the software handling of the ISR bit.
353 * Enable/Disable interrupt functions assume the card->irq_lock
354 * is held by the caller.
356 void rsxx_enable_ier(struct rsxx_cardinfo *card, unsigned int intr)
358 if (unlikely(card->halt) ||
359 unlikely(card->eeh_state))
362 __enable_intr(&card->ier_mask, intr);
363 iowrite32(card->ier_mask, card->regmap + IER);
366 void rsxx_disable_ier(struct rsxx_cardinfo *card, unsigned int intr)
368 if (unlikely(card->eeh_state))
371 __disable_intr(&card->ier_mask, intr);
372 iowrite32(card->ier_mask, card->regmap + IER);
375 void rsxx_enable_ier_and_isr(struct rsxx_cardinfo *card,
378 if (unlikely(card->halt) ||
379 unlikely(card->eeh_state))
382 __enable_intr(&card->isr_mask, intr);
383 __enable_intr(&card->ier_mask, intr);
384 iowrite32(card->ier_mask, card->regmap + IER);
386 void rsxx_disable_ier_and_isr(struct rsxx_cardinfo *card,
389 if (unlikely(card->eeh_state))
392 __disable_intr(&card->isr_mask, intr);
393 __disable_intr(&card->ier_mask, intr);
394 iowrite32(card->ier_mask, card->regmap + IER);
397 static irqreturn_t rsxx_isr(int irq, void *pdata)
399 struct rsxx_cardinfo *card = pdata;
405 spin_lock(&card->irq_lock);
410 if (unlikely(card->eeh_state))
413 isr = ioread32(card->regmap + ISR);
414 if (isr == 0xffffffff) {
416 * A few systems seem to have an intermittent issue
417 * where PCI reads return all Fs, but retrying the read
418 * a little later will return as expected.
420 dev_info(CARD_TO_DEV(card),
421 "ISR = 0xFFFFFFFF, retrying later\n");
425 isr &= card->isr_mask;
429 for (i = 0; i < card->n_targets; i++) {
430 if (isr & CR_INTR_DMA(i)) {
431 if (card->ier_mask & CR_INTR_DMA(i)) {
432 rsxx_disable_ier(card, CR_INTR_DMA(i));
435 queue_work(card->ctrl[i].done_wq,
436 &card->ctrl[i].dma_done_work);
441 if (isr & CR_INTR_CREG) {
442 queue_work(card->creg_ctrl.creg_wq,
443 &card->creg_ctrl.done_work);
447 if (isr & CR_INTR_EVENT) {
448 queue_work(card->event_wq, &card->event_work);
449 rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
452 } while (reread_isr);
454 spin_unlock(&card->irq_lock);
456 return handled ? IRQ_HANDLED : IRQ_NONE;
459 /*----------------- Card Event Handler -------------------*/
460 static const char * const rsxx_card_state_to_str(unsigned int state)
462 static const char * const state_strings[] = {
463 "Unknown", "Shutdown", "Starting", "Formatting",
464 "Uninitialized", "Good", "Shutting Down",
465 "Fault", "Read Only Fault", "dStroying"
468 return state_strings[ffs(state)];
471 static void card_state_change(struct rsxx_cardinfo *card,
472 unsigned int new_state)
476 dev_info(CARD_TO_DEV(card),
477 "card state change detected.(%s -> %s)\n",
478 rsxx_card_state_to_str(card->state),
479 rsxx_card_state_to_str(new_state));
481 card->state = new_state;
483 /* Don't attach DMA interfaces if the card has an invalid config */
484 if (!card->config_valid)
488 case CARD_STATE_RD_ONLY_FAULT:
489 dev_crit(CARD_TO_DEV(card),
490 "Hardware has entered read-only mode!\n");
492 * Fall through so the DMA devices can be attached and
493 * the user can attempt to pull off their data.
495 case CARD_STATE_GOOD:
496 st = rsxx_get_card_size8(card, &card->size8);
498 dev_err(CARD_TO_DEV(card),
499 "Failed attaching DMA devices\n");
501 if (card->config_valid)
502 set_capacity(card->gendisk, card->size8 >> 9);
505 case CARD_STATE_FAULT:
506 dev_crit(CARD_TO_DEV(card),
507 "Hardware Fault reported!\n");
510 /* Everything else, detach DMA interface if it's attached. */
511 case CARD_STATE_SHUTDOWN:
512 case CARD_STATE_STARTING:
513 case CARD_STATE_FORMATTING:
514 case CARD_STATE_UNINITIALIZED:
515 case CARD_STATE_SHUTTING_DOWN:
517 * dStroy is a term coined by marketing to represent the low level
520 case CARD_STATE_DSTROYING:
521 set_capacity(card->gendisk, 0);
526 static void card_event_handler(struct work_struct *work)
528 struct rsxx_cardinfo *card;
533 card = container_of(work, struct rsxx_cardinfo, event_work);
535 if (unlikely(card->halt))
539 * Enable the interrupt now to avoid any weird race conditions where a
540 * state change might occur while rsxx_get_card_state() is
541 * processing a returned creg cmd.
543 spin_lock_irqsave(&card->irq_lock, flags);
544 rsxx_enable_ier_and_isr(card, CR_INTR_EVENT);
545 spin_unlock_irqrestore(&card->irq_lock, flags);
547 st = rsxx_get_card_state(card, &state);
549 dev_info(CARD_TO_DEV(card),
550 "Failed reading state after event.\n");
554 if (card->state != state)
555 card_state_change(card, state);
557 if (card->creg_ctrl.creg_stats.stat & CREG_STAT_LOG_PENDING)
558 rsxx_read_hw_log(card);
561 /*----------------- Card Operations -------------------*/
562 static int card_shutdown(struct rsxx_cardinfo *card)
566 const int timeout = msecs_to_jiffies(120000);
569 /* We can't issue a shutdown if the card is in a transition state */
572 st = rsxx_get_card_state(card, &state);
575 } while (state == CARD_STATE_STARTING &&
576 (jiffies - start < timeout));
578 if (state == CARD_STATE_STARTING)
581 /* Only issue a shutdown if we need to */
582 if ((state != CARD_STATE_SHUTTING_DOWN) &&
583 (state != CARD_STATE_SHUTDOWN)) {
584 st = rsxx_issue_card_cmd(card, CARD_CMD_SHUTDOWN);
591 st = rsxx_get_card_state(card, &state);
594 } while (state != CARD_STATE_SHUTDOWN &&
595 (jiffies - start < timeout));
597 if (state != CARD_STATE_SHUTDOWN)
603 static int rsxx_eeh_frozen(struct pci_dev *dev)
605 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
609 dev_warn(&dev->dev, "IBM Flash Adapter PCI: preparing for slot reset.\n");
612 rsxx_mask_interrupts(card);
615 * We need to guarantee that the write for eeh_state and masking
616 * interrupts does not become reordered. This will prevent a possible
617 * race condition with the EEH code.
621 pci_disable_device(dev);
623 st = rsxx_eeh_save_issued_dmas(card);
627 rsxx_eeh_save_issued_creg(card);
629 for (i = 0; i < card->n_targets; i++) {
630 if (card->ctrl[i].status.buf)
631 pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
632 card->ctrl[i].status.buf,
633 card->ctrl[i].status.dma_addr);
634 if (card->ctrl[i].cmd.buf)
635 pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8,
636 card->ctrl[i].cmd.buf,
637 card->ctrl[i].cmd.dma_addr);
643 static void rsxx_eeh_failure(struct pci_dev *dev)
645 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
649 dev_err(&dev->dev, "IBM Flash Adapter PCI: disabling failed card.\n");
654 for (i = 0; i < card->n_targets; i++) {
655 spin_lock_bh(&card->ctrl[i].queue_lock);
656 cnt = rsxx_cleanup_dma_queue(&card->ctrl[i],
657 &card->ctrl[i].queue,
659 spin_unlock_bh(&card->ctrl[i].queue_lock);
661 cnt += rsxx_dma_cancel(&card->ctrl[i]);
664 dev_info(CARD_TO_DEV(card),
665 "Freed %d queued DMAs on channel %d\n",
666 cnt, card->ctrl[i].id);
670 static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card)
675 /* We need to wait for the hardware to reset */
676 while (iter++ < 10) {
677 status = ioread32(card->regmap + PCI_RECONFIG);
679 if (status & RSXX_FLUSH_BUSY) {
684 if (status & RSXX_FLUSH_TIMEOUT)
685 dev_warn(CARD_TO_DEV(card), "HW: flash controller timeout\n");
689 /* Hardware failed resetting itself. */
693 static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev,
694 enum pci_channel_state error)
698 if (dev->revision < RSXX_EEH_SUPPORT)
699 return PCI_ERS_RESULT_NONE;
701 if (error == pci_channel_io_perm_failure) {
702 rsxx_eeh_failure(dev);
703 return PCI_ERS_RESULT_DISCONNECT;
706 st = rsxx_eeh_frozen(dev);
708 dev_err(&dev->dev, "Slot reset setup failed\n");
709 rsxx_eeh_failure(dev);
710 return PCI_ERS_RESULT_DISCONNECT;
713 return PCI_ERS_RESULT_NEED_RESET;
716 static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev)
718 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
724 "IBM Flash Adapter PCI: recovering from slot reset.\n");
726 st = pci_enable_device(dev);
728 goto failed_hw_setup;
732 st = rsxx_eeh_fifo_flush_poll(card);
734 goto failed_hw_setup;
736 rsxx_dma_queue_reset(card);
738 for (i = 0; i < card->n_targets; i++) {
739 st = rsxx_hw_buffers_init(dev, &card->ctrl[i]);
741 goto failed_hw_buffers_init;
744 if (card->config_valid)
745 rsxx_dma_configure(card);
747 /* Clears the ISR register from spurious interrupts */
748 st = ioread32(card->regmap + ISR);
752 spin_lock_irqsave(&card->irq_lock, flags);
753 if (card->n_targets & RSXX_MAX_TARGETS)
754 rsxx_enable_ier_and_isr(card, CR_INTR_ALL_G);
756 rsxx_enable_ier_and_isr(card, CR_INTR_ALL_C);
757 spin_unlock_irqrestore(&card->irq_lock, flags);
759 rsxx_kick_creg_queue(card);
761 for (i = 0; i < card->n_targets; i++) {
762 spin_lock(&card->ctrl[i].queue_lock);
763 if (list_empty(&card->ctrl[i].queue)) {
764 spin_unlock(&card->ctrl[i].queue_lock);
767 spin_unlock(&card->ctrl[i].queue_lock);
769 queue_work(card->ctrl[i].issue_wq,
770 &card->ctrl[i].issue_dma_work);
773 dev_info(&dev->dev, "IBM Flash Adapter PCI: recovery complete.\n");
775 return PCI_ERS_RESULT_RECOVERED;
777 failed_hw_buffers_init:
778 for (i = 0; i < card->n_targets; i++) {
779 if (card->ctrl[i].status.buf)
780 pci_free_consistent(card->dev,
782 card->ctrl[i].status.buf,
783 card->ctrl[i].status.dma_addr);
784 if (card->ctrl[i].cmd.buf)
785 pci_free_consistent(card->dev,
786 COMMAND_BUFFER_SIZE8,
787 card->ctrl[i].cmd.buf,
788 card->ctrl[i].cmd.dma_addr);
791 rsxx_eeh_failure(dev);
792 return PCI_ERS_RESULT_DISCONNECT;
796 /*----------------- Driver Initialization & Setup -------------------*/
797 /* Returns: 0 if the driver is compatible with the device
798 -1 if the driver is NOT compatible with the device */
799 static int rsxx_compatibility_check(struct rsxx_cardinfo *card)
801 unsigned char pci_rev;
803 pci_read_config_byte(card->dev, PCI_REVISION_ID, &pci_rev);
805 if (pci_rev > RS70_PCI_REV_SUPPORTED)
810 static int rsxx_pci_probe(struct pci_dev *dev,
811 const struct pci_device_id *id)
813 struct rsxx_cardinfo *card;
815 unsigned int sync_timeout;
817 dev_info(&dev->dev, "PCI-Flash SSD discovered\n");
819 card = kzalloc(sizeof(*card), GFP_KERNEL);
824 pci_set_drvdata(dev, card);
827 if (!ida_pre_get(&rsxx_disk_ida, GFP_KERNEL)) {
832 spin_lock(&rsxx_ida_lock);
833 st = ida_get_new(&rsxx_disk_ida, &card->disk_id);
834 spin_unlock(&rsxx_ida_lock);
835 } while (st == -EAGAIN);
840 st = pci_enable_device(dev);
845 pci_set_dma_max_seg_size(dev, RSXX_HW_BLK_SIZE);
847 st = pci_set_dma_mask(dev, DMA_BIT_MASK(64));
849 dev_err(CARD_TO_DEV(card),
850 "No usable DMA configuration,aborting\n");
851 goto failed_dma_mask;
854 st = pci_request_regions(dev, DRIVER_NAME);
856 dev_err(CARD_TO_DEV(card),
857 "Failed to request memory region\n");
858 goto failed_request_regions;
861 if (pci_resource_len(dev, 0) == 0) {
862 dev_err(CARD_TO_DEV(card), "BAR0 has length 0!\n");
867 card->regmap = pci_iomap(dev, 0, 0);
869 dev_err(CARD_TO_DEV(card), "Failed to map BAR0\n");
874 spin_lock_init(&card->irq_lock);
878 spin_lock_irq(&card->irq_lock);
879 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
880 spin_unlock_irq(&card->irq_lock);
883 st = pci_enable_msi(dev);
885 dev_warn(CARD_TO_DEV(card),
886 "Failed to enable MSI\n");
889 st = request_irq(dev->irq, rsxx_isr, IRQF_DISABLED | IRQF_SHARED,
892 dev_err(CARD_TO_DEV(card),
893 "Failed requesting IRQ%d\n", dev->irq);
897 /************* Setup Processor Command Interface *************/
898 st = rsxx_creg_setup(card);
900 dev_err(CARD_TO_DEV(card), "Failed to setup creg interface.\n");
901 goto failed_creg_setup;
904 spin_lock_irq(&card->irq_lock);
905 rsxx_enable_ier_and_isr(card, CR_INTR_CREG);
906 spin_unlock_irq(&card->irq_lock);
908 st = rsxx_compatibility_check(card);
910 dev_warn(CARD_TO_DEV(card),
911 "Incompatible driver detected. Please update the driver.\n");
913 goto failed_compatiblity_check;
916 /************* Load Card Config *************/
917 st = rsxx_load_config(card);
919 dev_err(CARD_TO_DEV(card),
920 "Failed loading card config\n");
922 /************* Setup DMA Engine *************/
923 st = rsxx_get_num_targets(card, &card->n_targets);
925 dev_info(CARD_TO_DEV(card),
926 "Failed reading the number of DMA targets\n");
928 card->ctrl = kzalloc(card->n_targets * sizeof(*card->ctrl), GFP_KERNEL);
931 goto failed_dma_setup;
934 st = rsxx_dma_setup(card);
936 dev_info(CARD_TO_DEV(card),
937 "Failed to setup DMA engine\n");
938 goto failed_dma_setup;
941 /************* Setup Card Event Handler *************/
942 card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event");
943 if (!card->event_wq) {
944 dev_err(CARD_TO_DEV(card), "Failed card event setup.\n");
945 goto failed_event_handler;
948 INIT_WORK(&card->event_work, card_event_handler);
950 st = rsxx_setup_dev(card);
952 goto failed_create_dev;
954 rsxx_get_card_state(card, &card->state);
956 dev_info(CARD_TO_DEV(card),
958 rsxx_card_state_to_str(card->state));
961 * Now that the DMA Engine and devices have been setup,
962 * we can enable the event interrupt(it kicks off actions in
963 * those layers so we couldn't enable it right away.)
965 spin_lock_irq(&card->irq_lock);
966 rsxx_enable_ier_and_isr(card, CR_INTR_EVENT);
967 spin_unlock_irq(&card->irq_lock);
969 if (card->state == CARD_STATE_SHUTDOWN) {
970 st = rsxx_issue_card_cmd(card, CARD_CMD_STARTUP);
972 dev_crit(CARD_TO_DEV(card),
973 "Failed issuing card startup\n");
975 sync_timeout = SYNC_START_TIMEOUT;
977 dev_info(CARD_TO_DEV(card),
978 "Waiting for card to startup\n");
984 rsxx_get_card_state(card, &card->state);
985 } while (sync_timeout &&
986 (card->state == CARD_STATE_STARTING));
988 if (card->state == CARD_STATE_STARTING) {
989 dev_warn(CARD_TO_DEV(card),
990 "Card startup timed out\n");
993 dev_info(CARD_TO_DEV(card),
995 rsxx_card_state_to_str(card->state));
996 st = rsxx_get_card_size8(card, &card->size8);
1001 } else if (card->state == CARD_STATE_GOOD ||
1002 card->state == CARD_STATE_RD_ONLY_FAULT) {
1003 st = rsxx_get_card_size8(card, &card->size8);
1008 rsxx_attach_dev(card);
1010 /************* Setup Debugfs *************/
1011 rsxx_debugfs_dev_new(card);
1016 destroy_workqueue(card->event_wq);
1017 card->event_wq = NULL;
1018 failed_event_handler:
1019 rsxx_dma_destroy(card);
1021 failed_compatiblity_check:
1022 destroy_workqueue(card->creg_ctrl.creg_wq);
1023 card->creg_ctrl.creg_wq = NULL;
1025 spin_lock_irq(&card->irq_lock);
1026 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
1027 spin_unlock_irq(&card->irq_lock);
1028 free_irq(dev->irq, card);
1030 pci_disable_msi(dev);
1032 pci_iounmap(dev, card->regmap);
1034 pci_release_regions(dev);
1035 failed_request_regions:
1037 pci_disable_device(dev);
1039 spin_lock(&rsxx_ida_lock);
1040 ida_remove(&rsxx_disk_ida, card->disk_id);
1041 spin_unlock(&rsxx_ida_lock);
1048 static void rsxx_pci_remove(struct pci_dev *dev)
1050 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
1051 unsigned long flags;
1058 dev_info(CARD_TO_DEV(card),
1059 "Removing PCI-Flash SSD.\n");
1061 rsxx_detach_dev(card);
1063 for (i = 0; i < card->n_targets; i++) {
1064 spin_lock_irqsave(&card->irq_lock, flags);
1065 rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i));
1066 spin_unlock_irqrestore(&card->irq_lock, flags);
1069 st = card_shutdown(card);
1071 dev_crit(CARD_TO_DEV(card), "Shutdown failed!\n");
1073 /* Sync outstanding event handlers. */
1074 spin_lock_irqsave(&card->irq_lock, flags);
1075 rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
1076 spin_unlock_irqrestore(&card->irq_lock, flags);
1078 cancel_work_sync(&card->event_work);
1080 rsxx_destroy_dev(card);
1081 rsxx_dma_destroy(card);
1083 spin_lock_irqsave(&card->irq_lock, flags);
1084 rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
1085 spin_unlock_irqrestore(&card->irq_lock, flags);
1087 /* Prevent work_structs from re-queuing themselves. */
1090 debugfs_remove_recursive(card->debugfs_dir);
1092 free_irq(dev->irq, card);
1095 pci_disable_msi(dev);
1097 rsxx_creg_destroy(card);
1099 pci_iounmap(dev, card->regmap);
1101 pci_disable_device(dev);
1102 pci_release_regions(dev);
1107 static int rsxx_pci_suspend(struct pci_dev *dev, pm_message_t state)
1109 /* We don't support suspend at this time. */
1113 static void rsxx_pci_shutdown(struct pci_dev *dev)
1115 struct rsxx_cardinfo *card = pci_get_drvdata(dev);
1116 unsigned long flags;
1122 dev_info(CARD_TO_DEV(card), "Shutting down PCI-Flash SSD.\n");
1124 rsxx_detach_dev(card);
1126 for (i = 0; i < card->n_targets; i++) {
1127 spin_lock_irqsave(&card->irq_lock, flags);
1128 rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i));
1129 spin_unlock_irqrestore(&card->irq_lock, flags);
1132 card_shutdown(card);
1135 static const struct pci_error_handlers rsxx_err_handler = {
1136 .error_detected = rsxx_error_detected,
1137 .slot_reset = rsxx_slot_reset,
1140 static DEFINE_PCI_DEVICE_TABLE(rsxx_pci_ids) = {
1141 {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS70_FLASH)},
1142 {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS80_FLASH)},
1146 MODULE_DEVICE_TABLE(pci, rsxx_pci_ids);
1148 static struct pci_driver rsxx_pci_driver = {
1149 .name = DRIVER_NAME,
1150 .id_table = rsxx_pci_ids,
1151 .probe = rsxx_pci_probe,
1152 .remove = rsxx_pci_remove,
1153 .suspend = rsxx_pci_suspend,
1154 .shutdown = rsxx_pci_shutdown,
1155 .err_handler = &rsxx_err_handler,
1158 static int __init rsxx_core_init(void)
1162 st = rsxx_dev_init();
1166 st = rsxx_dma_init();
1168 goto dma_init_failed;
1170 st = rsxx_creg_init();
1172 goto creg_init_failed;
1174 return pci_register_driver(&rsxx_pci_driver);
1184 static void __exit rsxx_core_cleanup(void)
1186 pci_unregister_driver(&rsxx_pci_driver);
1187 rsxx_creg_cleanup();
1192 module_init(rsxx_core_init);
1193 module_exit(rsxx_core_cleanup);