diff options
Diffstat (limited to 'drivers/block/rsxx/core.c')
| -rw-r--r-- | drivers/block/rsxx/core.c | 1126 |
1 files changed, 0 insertions, 1126 deletions
diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c deleted file mode 100644 index 8d9d69f5dfbc..000000000000 --- a/drivers/block/rsxx/core.c +++ /dev/null @@ -1,1126 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* -* Filename: core.c -* -* Authors: Joshua Morris <josh.h.morris@us.ibm.com> -* Philip Kelleher <pjk1939@linux.vnet.ibm.com> -* -* (C) Copyright 2013 IBM Corporation -*/ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/reboot.h> -#include <linux/slab.h> -#include <linux/bitops.h> -#include <linux/delay.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> - -#include <linux/genhd.h> -#include <linux/idr.h> - -#include "rsxx_priv.h" -#include "rsxx_cfg.h" - -#define NO_LEGACY 0 -#define SYNC_START_TIMEOUT (10 * 60) /* 10 minutes */ - -MODULE_DESCRIPTION("IBM Flash Adapter 900GB Full Height Device Driver"); -MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRIVER_VERSION); - -static unsigned int force_legacy = NO_LEGACY; -module_param(force_legacy, uint, 0444); -MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts"); - -static unsigned int sync_start = 1; -module_param(sync_start, uint, 0444); -MODULE_PARM_DESC(sync_start, "On by Default: Driver load will not complete " - "until the card startup has completed."); - -static DEFINE_IDA(rsxx_disk_ida); - -/* --------------------Debugfs Setup ------------------- */ - -static int rsxx_attr_pci_regs_show(struct seq_file *m, void *p) -{ - struct rsxx_cardinfo *card = m->private; - - seq_printf(m, "HWID 0x%08x\n", - ioread32(card->regmap + HWID)); - seq_printf(m, "SCRATCH 0x%08x\n", - ioread32(card->regmap + SCRATCH)); - seq_printf(m, "IER 0x%08x\n", - ioread32(card->regmap + IER)); - seq_printf(m, "IPR 0x%08x\n", - ioread32(card->regmap + IPR)); - seq_printf(m, "CREG_CMD 0x%08x\n", - ioread32(card->regmap + CREG_CMD)); - seq_printf(m, "CREG_ADD 0x%08x\n", - ioread32(card->regmap + CREG_ADD)); - seq_printf(m, "CREG_CNT 0x%08x\n", - ioread32(card->regmap + CREG_CNT)); - seq_printf(m, "CREG_STAT 0x%08x\n", - ioread32(card->regmap + CREG_STAT)); - seq_printf(m, "CREG_DATA0 0x%08x\n", - ioread32(card->regmap + CREG_DATA0)); - seq_printf(m, "CREG_DATA1 0x%08x\n", - ioread32(card->regmap + CREG_DATA1)); - seq_printf(m, "CREG_DATA2 0x%08x\n", - ioread32(card->regmap + CREG_DATA2)); - seq_printf(m, "CREG_DATA3 0x%08x\n", - ioread32(card->regmap + CREG_DATA3)); - seq_printf(m, "CREG_DATA4 0x%08x\n", - ioread32(card->regmap + CREG_DATA4)); - seq_printf(m, "CREG_DATA5 0x%08x\n", - ioread32(card->regmap + CREG_DATA5)); - seq_printf(m, "CREG_DATA6 0x%08x\n", - ioread32(card->regmap + CREG_DATA6)); - seq_printf(m, "CREG_DATA7 0x%08x\n", - ioread32(card->regmap + CREG_DATA7)); - seq_printf(m, "INTR_COAL 0x%08x\n", - ioread32(card->regmap + INTR_COAL)); - seq_printf(m, "HW_ERROR 0x%08x\n", - ioread32(card->regmap + HW_ERROR)); - seq_printf(m, "DEBUG0 0x%08x\n", - ioread32(card->regmap + PCI_DEBUG0)); - seq_printf(m, "DEBUG1 0x%08x\n", - ioread32(card->regmap + PCI_DEBUG1)); - seq_printf(m, "DEBUG2 0x%08x\n", - ioread32(card->regmap + PCI_DEBUG2)); - seq_printf(m, "DEBUG3 0x%08x\n", - ioread32(card->regmap + PCI_DEBUG3)); - seq_printf(m, "DEBUG4 0x%08x\n", - ioread32(card->regmap + PCI_DEBUG4)); - seq_printf(m, "DEBUG5 0x%08x\n", - ioread32(card->regmap + PCI_DEBUG5)); - seq_printf(m, "DEBUG6 0x%08x\n", - ioread32(card->regmap + PCI_DEBUG6)); - seq_printf(m, "DEBUG7 0x%08x\n", - ioread32(card->regmap + PCI_DEBUG7)); - seq_printf(m, "RECONFIG 0x%08x\n", - ioread32(card->regmap + PCI_RECONFIG)); - - return 0; -} - -static int rsxx_attr_stats_show(struct seq_file *m, void *p) -{ - struct rsxx_cardinfo *card = m->private; - int i; - - for (i = 0; i < card->n_targets; i++) { - seq_printf(m, "Ctrl %d CRC Errors = %d\n", - i, card->ctrl[i].stats.crc_errors); - seq_printf(m, "Ctrl %d Hard Errors = %d\n", - i, card->ctrl[i].stats.hard_errors); - seq_printf(m, "Ctrl %d Soft Errors = %d\n", - i, card->ctrl[i].stats.soft_errors); - seq_printf(m, "Ctrl %d Writes Issued = %d\n", - i, card->ctrl[i].stats.writes_issued); - seq_printf(m, "Ctrl %d Writes Failed = %d\n", - i, card->ctrl[i].stats.writes_failed); - seq_printf(m, "Ctrl %d Reads Issued = %d\n", - i, card->ctrl[i].stats.reads_issued); - seq_printf(m, "Ctrl %d Reads Failed = %d\n", - i, card->ctrl[i].stats.reads_failed); - seq_printf(m, "Ctrl %d Reads Retried = %d\n", - i, card->ctrl[i].stats.reads_retried); - seq_printf(m, "Ctrl %d Discards Issued = %d\n", - i, card->ctrl[i].stats.discards_issued); - seq_printf(m, "Ctrl %d Discards Failed = %d\n", - i, card->ctrl[i].stats.discards_failed); - seq_printf(m, "Ctrl %d DMA SW Errors = %d\n", - i, card->ctrl[i].stats.dma_sw_err); - seq_printf(m, "Ctrl %d DMA HW Faults = %d\n", - i, card->ctrl[i].stats.dma_hw_fault); - seq_printf(m, "Ctrl %d DMAs Cancelled = %d\n", - i, card->ctrl[i].stats.dma_cancelled); - seq_printf(m, "Ctrl %d SW Queue Depth = %d\n", - i, card->ctrl[i].stats.sw_q_depth); - seq_printf(m, "Ctrl %d HW Queue Depth = %d\n", - i, atomic_read(&card->ctrl[i].stats.hw_q_depth)); - } - - return 0; -} - -static int rsxx_attr_stats_open(struct inode *inode, struct file *file) -{ - return single_open(file, rsxx_attr_stats_show, inode->i_private); -} - -static int rsxx_attr_pci_regs_open(struct inode *inode, struct file *file) -{ - return single_open(file, rsxx_attr_pci_regs_show, inode->i_private); -} - -static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf, - size_t cnt, loff_t *ppos) -{ - struct rsxx_cardinfo *card = file_inode(fp)->i_private; - char *buf; - int st; - - buf = kzalloc(cnt, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - st = rsxx_creg_read(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1); - if (!st) { - if (copy_to_user(ubuf, buf, cnt)) - st = -EFAULT; - } - kfree(buf); - if (st) - return st; - *ppos += cnt; - return cnt; -} - -static ssize_t rsxx_cram_write(struct file *fp, const char __user *ubuf, - size_t cnt, loff_t *ppos) -{ - struct rsxx_cardinfo *card = file_inode(fp)->i_private; - char *buf; - ssize_t st; - - buf = memdup_user(ubuf, cnt); - if (IS_ERR(buf)) - return PTR_ERR(buf); - - st = rsxx_creg_write(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1); - kfree(buf); - if (st) - return st; - *ppos += cnt; - return cnt; -} - -static const struct file_operations debugfs_cram_fops = { - .owner = THIS_MODULE, - .read = rsxx_cram_read, - .write = rsxx_cram_write, -}; - -static const struct file_operations debugfs_stats_fops = { - .owner = THIS_MODULE, - .open = rsxx_attr_stats_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static const struct file_operations debugfs_pci_regs_fops = { - .owner = THIS_MODULE, - .open = rsxx_attr_pci_regs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static void rsxx_debugfs_dev_new(struct rsxx_cardinfo *card) -{ - struct dentry *debugfs_stats; - struct dentry *debugfs_pci_regs; - struct dentry *debugfs_cram; - - card->debugfs_dir = debugfs_create_dir(card->gendisk->disk_name, NULL); - if (IS_ERR_OR_NULL(card->debugfs_dir)) - goto failed_debugfs_dir; - - debugfs_stats = debugfs_create_file("stats", 0444, - card->debugfs_dir, card, - &debugfs_stats_fops); - if (IS_ERR_OR_NULL(debugfs_stats)) - goto failed_debugfs_stats; - - debugfs_pci_regs = debugfs_create_file("pci_regs", 0444, - card->debugfs_dir, card, - &debugfs_pci_regs_fops); - if (IS_ERR_OR_NULL(debugfs_pci_regs)) - goto failed_debugfs_pci_regs; - - debugfs_cram = debugfs_create_file("cram", 0644, - card->debugfs_dir, card, - &debugfs_cram_fops); - if (IS_ERR_OR_NULL(debugfs_cram)) - goto failed_debugfs_cram; - - return; -failed_debugfs_cram: - debugfs_remove(debugfs_pci_regs); -failed_debugfs_pci_regs: - debugfs_remove(debugfs_stats); -failed_debugfs_stats: - debugfs_remove(card->debugfs_dir); -failed_debugfs_dir: - card->debugfs_dir = NULL; -} - -/*----------------- Interrupt Control & Handling -------------------*/ - -static void rsxx_mask_interrupts(struct rsxx_cardinfo *card) -{ - card->isr_mask = 0; - card->ier_mask = 0; -} - -static void __enable_intr(unsigned int *mask, unsigned int intr) -{ - *mask |= intr; -} - -static void __disable_intr(unsigned int *mask, unsigned int intr) -{ - *mask &= ~intr; -} - -/* - * NOTE: Disabling the IER will disable the hardware interrupt. - * Disabling the ISR will disable the software handling of the ISR bit. - * - * Enable/Disable interrupt functions assume the card->irq_lock - * is held by the caller. - */ -void rsxx_enable_ier(struct rsxx_cardinfo *card, unsigned int intr) -{ - if (unlikely(card->halt) || - unlikely(card->eeh_state)) - return; - - __enable_intr(&card->ier_mask, intr); - iowrite32(card->ier_mask, card->regmap + IER); -} - -void rsxx_disable_ier(struct rsxx_cardinfo *card, unsigned int intr) -{ - if (unlikely(card->eeh_state)) - return; - - __disable_intr(&card->ier_mask, intr); - iowrite32(card->ier_mask, card->regmap + IER); -} - -void rsxx_enable_ier_and_isr(struct rsxx_cardinfo *card, - unsigned int intr) -{ - if (unlikely(card->halt) || - unlikely(card->eeh_state)) - return; - - __enable_intr(&card->isr_mask, intr); - __enable_intr(&card->ier_mask, intr); - iowrite32(card->ier_mask, card->regmap + IER); -} -void rsxx_disable_ier_and_isr(struct rsxx_cardinfo *card, - unsigned int intr) -{ - if (unlikely(card->eeh_state)) - return; - - __disable_intr(&card->isr_mask, intr); - __disable_intr(&card->ier_mask, intr); - iowrite32(card->ier_mask, card->regmap + IER); -} - -static irqreturn_t rsxx_isr(int irq, void *pdata) -{ - struct rsxx_cardinfo *card = pdata; - unsigned int isr; - int handled = 0; - int reread_isr; - int i; - - spin_lock(&card->irq_lock); - - do { - reread_isr = 0; - - if (unlikely(card->eeh_state)) - break; - - isr = ioread32(card->regmap + ISR); - if (isr == 0xffffffff) { - /* - * A few systems seem to have an intermittent issue - * where PCI reads return all Fs, but retrying the read - * a little later will return as expected. - */ - dev_info(CARD_TO_DEV(card), - "ISR = 0xFFFFFFFF, retrying later\n"); - break; - } - - isr &= card->isr_mask; - if (!isr) - break; - - for (i = 0; i < card->n_targets; i++) { - if (isr & CR_INTR_DMA(i)) { - if (card->ier_mask & CR_INTR_DMA(i)) { - rsxx_disable_ier(card, CR_INTR_DMA(i)); - reread_isr = 1; - } - queue_work(card->ctrl[i].done_wq, - &card->ctrl[i].dma_done_work); - handled++; - } - } - - if (isr & CR_INTR_CREG) { - queue_work(card->creg_ctrl.creg_wq, - &card->creg_ctrl.done_work); - handled++; - } - - if (isr & CR_INTR_EVENT) { - queue_work(card->event_wq, &card->event_work); - rsxx_disable_ier_and_isr(card, CR_INTR_EVENT); - handled++; - } - } while (reread_isr); - - spin_unlock(&card->irq_lock); - - return handled ? IRQ_HANDLED : IRQ_NONE; -} - -/*----------------- Card Event Handler -------------------*/ -static const char *rsxx_card_state_to_str(unsigned int state) -{ - static const char * const state_strings[] = { - "Unknown", "Shutdown", "Starting", "Formatting", - "Uninitialized", "Good", "Shutting Down", - "Fault", "Read Only Fault", "dStroying" - }; - - return state_strings[ffs(state)]; -} - -static void card_state_change(struct rsxx_cardinfo *card, - unsigned int new_state) -{ - int st; - - dev_info(CARD_TO_DEV(card), - "card state change detected.(%s -> %s)\n", - rsxx_card_state_to_str(card->state), - rsxx_card_state_to_str(new_state)); - - card->state = new_state; - - /* Don't attach DMA interfaces if the card has an invalid config */ - if (!card->config_valid) - return; - - switch (new_state) { - case CARD_STATE_RD_ONLY_FAULT: - dev_crit(CARD_TO_DEV(card), - "Hardware has entered read-only mode!\n"); - /* - * Fall through so the DMA devices can be attached and - * the user can attempt to pull off their data. - */ - fallthrough; - case CARD_STATE_GOOD: - st = rsxx_get_card_size8(card, &card->size8); - if (st) - dev_err(CARD_TO_DEV(card), - "Failed attaching DMA devices\n"); - - if (card->config_valid) - set_capacity(card->gendisk, card->size8 >> 9); - break; - - case CARD_STATE_FAULT: - dev_crit(CARD_TO_DEV(card), - "Hardware Fault reported!\n"); - fallthrough; - - /* Everything else, detach DMA interface if it's attached. */ - case CARD_STATE_SHUTDOWN: - case CARD_STATE_STARTING: - case CARD_STATE_FORMATTING: - case CARD_STATE_UNINITIALIZED: - case CARD_STATE_SHUTTING_DOWN: - /* - * dStroy is a term coined by marketing to represent the low level - * secure erase. - */ - case CARD_STATE_DSTROYING: - set_capacity(card->gendisk, 0); - break; - } -} - -static void card_event_handler(struct work_struct *work) -{ - struct rsxx_cardinfo *card; - unsigned int state; - unsigned long flags; - int st; - - card = container_of(work, struct rsxx_cardinfo, event_work); - - if (unlikely(card->halt)) - return; - - /* - * Enable the interrupt now to avoid any weird race conditions where a - * state change might occur while rsxx_get_card_state() is - * processing a returned creg cmd. - */ - spin_lock_irqsave(&card->irq_lock, flags); - rsxx_enable_ier_and_isr(card, CR_INTR_EVENT); - spin_unlock_irqrestore(&card->irq_lock, flags); - - st = rsxx_get_card_state(card, &state); - if (st) { - dev_info(CARD_TO_DEV(card), - "Failed reading state after event.\n"); - return; - } - - if (card->state != state) - card_state_change(card, state); - - if (card->creg_ctrl.creg_stats.stat & CREG_STAT_LOG_PENDING) - rsxx_read_hw_log(card); -} - -/*----------------- Card Operations -------------------*/ -static int card_shutdown(struct rsxx_cardinfo *card) -{ - unsigned int state; - signed long start; - const int timeout = msecs_to_jiffies(120000); - int st; - - /* We can't issue a shutdown if the card is in a transition state */ - start = jiffies; - do { - st = rsxx_get_card_state(card, &state); - if (st) - return st; - } while (state == CARD_STATE_STARTING && - (jiffies - start < timeout)); - - if (state == CARD_STATE_STARTING) - return -ETIMEDOUT; - - /* Only issue a shutdown if we need to */ - if ((state != CARD_STATE_SHUTTING_DOWN) && - (state != CARD_STATE_SHUTDOWN)) { - st = rsxx_issue_card_cmd(card, CARD_CMD_SHUTDOWN); - if (st) - return st; - } - - start = jiffies; - do { - st = rsxx_get_card_state(card, &state); - if (st) - return st; - } while (state != CARD_STATE_SHUTDOWN && - (jiffies - start < timeout)); - - if (state != CARD_STATE_SHUTDOWN) - return -ETIMEDOUT; - - return 0; -} - -static int rsxx_eeh_frozen(struct pci_dev *dev) -{ - struct rsxx_cardinfo *card = pci_get_drvdata(dev); - int i; - int st; - - dev_warn(&dev->dev, "IBM Flash Adapter PCI: preparing for slot reset.\n"); - - card->eeh_state = 1; - rsxx_mask_interrupts(card); - - /* - * We need to guarantee that the write for eeh_state and masking - * interrupts does not become reordered. This will prevent a possible - * race condition with the EEH code. - */ - wmb(); - - pci_disable_device(dev); - - st = rsxx_eeh_save_issued_dmas(card); - if (st) - return st; - - rsxx_eeh_save_issued_creg(card); - - for (i = 0; i < card->n_targets; i++) { - if (card->ctrl[i].status.buf) - dma_free_coherent(&card->dev->dev, - STATUS_BUFFER_SIZE8, - card->ctrl[i].status.buf, - card->ctrl[i].status.dma_addr); - if (card->ctrl[i].cmd.buf) - dma_free_coherent(&card->dev->dev, - COMMAND_BUFFER_SIZE8, - card->ctrl[i].cmd.buf, - card->ctrl[i].cmd.dma_addr); - } - - return 0; -} - -static void rsxx_eeh_failure(struct pci_dev *dev) -{ - struct rsxx_cardinfo *card = pci_get_drvdata(dev); - int i; - int cnt = 0; - - dev_err(&dev->dev, "IBM Flash Adapter PCI: disabling failed card.\n"); - - card->eeh_state = 1; - card->halt = 1; - - for (i = 0; i < card->n_targets; i++) { - spin_lock_bh(&card->ctrl[i].queue_lock); - cnt = rsxx_cleanup_dma_queue(&card->ctrl[i], - &card->ctrl[i].queue, - COMPLETE_DMA); - spin_unlock_bh(&card->ctrl[i].queue_lock); - - cnt += rsxx_dma_cancel(&card->ctrl[i]); - - if (cnt) - dev_info(CARD_TO_DEV(card), - "Freed %d queued DMAs on channel %d\n", - cnt, card->ctrl[i].id); - } -} - -static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card) -{ - unsigned int status; - int iter = 0; - - /* We need to wait for the hardware to reset */ - while (iter++ < 10) { - status = ioread32(card->regmap + PCI_RECONFIG); - - if (status & RSXX_FLUSH_BUSY) { - ssleep(1); - continue; - } - - if (status & RSXX_FLUSH_TIMEOUT) - dev_warn(CARD_TO_DEV(card), "HW: flash controller timeout\n"); - return 0; - } - - /* Hardware failed resetting itself. */ - return -1; -} - -static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev, - pci_channel_state_t error) -{ - int st; - - if (dev->revision < RSXX_EEH_SUPPORT) - return PCI_ERS_RESULT_NONE; - - if (error == pci_channel_io_perm_failure) { - rsxx_eeh_failure(dev); - return PCI_ERS_RESULT_DISCONNECT; - } - - st = rsxx_eeh_frozen(dev); - if (st) { - dev_err(&dev->dev, "Slot reset setup failed\n"); - rsxx_eeh_failure(dev); - return PCI_ERS_RESULT_DISCONNECT; - } - - return PCI_ERS_RESULT_NEED_RESET; -} - -static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev) -{ - struct rsxx_cardinfo *card = pci_get_drvdata(dev); - unsigned long flags; - int i; - int st; - - dev_warn(&dev->dev, - "IBM Flash Adapter PCI: recovering from slot reset.\n"); - - st = pci_enable_device(dev); - if (st) - goto failed_hw_setup; - - pci_set_master(dev); - - st = rsxx_eeh_fifo_flush_poll(card); - if (st) - goto failed_hw_setup; - - rsxx_dma_queue_reset(card); - - for (i = 0; i < card->n_targets; i++) { - st = rsxx_hw_buffers_init(dev, &card->ctrl[i]); - if (st) - goto failed_hw_buffers_init; - } - - if (card->config_valid) - rsxx_dma_configure(card); - - /* Clears the ISR register from spurious interrupts */ - st = ioread32(card->regmap + ISR); - - card->eeh_state = 0; - - spin_lock_irqsave(&card->irq_lock, flags); - if (card->n_targets & RSXX_MAX_TARGETS) - rsxx_enable_ier_and_isr(card, CR_INTR_ALL_G); - else - rsxx_enable_ier_and_isr(card, CR_INTR_ALL_C); - spin_unlock_irqrestore(&card->irq_lock, flags); - - rsxx_kick_creg_queue(card); - - for (i = 0; i < card->n_targets; i++) { - spin_lock(&card->ctrl[i].queue_lock); - if (list_empty(&card->ctrl[i].queue)) { - spin_unlock(&card->ctrl[i].queue_lock); - continue; - } - spin_unlock(&card->ctrl[i].queue_lock); - - queue_work(card->ctrl[i].issue_wq, - &card->ctrl[i].issue_dma_work); - } - - dev_info(&dev->dev, "IBM Flash Adapter PCI: recovery complete.\n"); - - return PCI_ERS_RESULT_RECOVERED; - -failed_hw_buffers_init: - for (i = 0; i < card->n_targets; i++) { - if (card->ctrl[i].status.buf) - dma_free_coherent(&card->dev->dev, - STATUS_BUFFER_SIZE8, - card->ctrl[i].status.buf, - card->ctrl[i].status.dma_addr); - if (card->ctrl[i].cmd.buf) - dma_free_coherent(&card->dev->dev, - COMMAND_BUFFER_SIZE8, - card->ctrl[i].cmd.buf, - card->ctrl[i].cmd.dma_addr); - } -failed_hw_setup: - rsxx_eeh_failure(dev); - return PCI_ERS_RESULT_DISCONNECT; - -} - -/*----------------- Driver Initialization & Setup -------------------*/ -/* Returns: 0 if the driver is compatible with the device - -1 if the driver is NOT compatible with the device */ -static int rsxx_compatibility_check(struct rsxx_cardinfo *card) -{ - unsigned char pci_rev; - - pci_read_config_byte(card->dev, PCI_REVISION_ID, &pci_rev); - - if (pci_rev > RS70_PCI_REV_SUPPORTED) - return -1; - return 0; -} - -static int rsxx_pci_probe(struct pci_dev *dev, - const struct pci_device_id *id) -{ - struct rsxx_cardinfo *card; - int st; - unsigned int sync_timeout; - - dev_info(&dev->dev, "PCI-Flash SSD discovered\n"); - - card = kzalloc(sizeof(*card), GFP_KERNEL); - if (!card) - return -ENOMEM; - - card->dev = dev; - pci_set_drvdata(dev, card); - - st = ida_alloc(&rsxx_disk_ida, GFP_KERNEL); - if (st < 0) - goto failed_ida_get; - card->disk_id = st; - - st = pci_enable_device(dev); - if (st) - goto failed_enable; - - pci_set_master(dev); - - st = dma_set_mask(&dev->dev, DMA_BIT_MASK(64)); - if (st) { - dev_err(CARD_TO_DEV(card), - "No usable DMA configuration,aborting\n"); - goto failed_dma_mask; - } - - st = pci_request_regions(dev, DRIVER_NAME); - if (st) { - dev_err(CARD_TO_DEV(card), - "Failed to request memory region\n"); - goto failed_request_regions; - } - - if (pci_resource_len(dev, 0) == 0) { - dev_err(CARD_TO_DEV(card), "BAR0 has length 0!\n"); - st = -ENOMEM; - goto failed_iomap; - } - - card->regmap = pci_iomap(dev, 0, 0); - if (!card->regmap) { - dev_err(CARD_TO_DEV(card), "Failed to map BAR0\n"); - st = -ENOMEM; - goto failed_iomap; - } - - spin_lock_init(&card->irq_lock); - card->halt = 0; - card->eeh_state = 0; - - spin_lock_irq(&card->irq_lock); - rsxx_disable_ier_and_isr(card, CR_INTR_ALL); - spin_unlock_irq(&card->irq_lock); - - if (!force_legacy) { - st = pci_enable_msi(dev); - if (st) - dev_warn(CARD_TO_DEV(card), - "Failed to enable MSI\n"); - } - - st = request_irq(dev->irq, rsxx_isr, IRQF_SHARED, - DRIVER_NAME, card); - if (st) { - dev_err(CARD_TO_DEV(card), - "Failed requesting IRQ%d\n", dev->irq); - goto failed_irq; - } - - /************* Setup Processor Command Interface *************/ - st = rsxx_creg_setup(card); - if (st) { - dev_err(CARD_TO_DEV(card), "Failed to setup creg interface.\n"); - goto failed_creg_setup; - } - - spin_lock_irq(&card->irq_lock); - rsxx_enable_ier_and_isr(card, CR_INTR_CREG); - spin_unlock_irq(&card->irq_lock); - - st = rsxx_compatibility_check(card); - if (st) { - dev_warn(CARD_TO_DEV(card), - "Incompatible driver detected. Please update the driver.\n"); - st = -EINVAL; - goto failed_compatiblity_check; - } - - /************* Load Card Config *************/ - st = rsxx_load_config(card); - if (st) - dev_err(CARD_TO_DEV(card), - "Failed loading card config\n"); - - /************* Setup DMA Engine *************/ - st = rsxx_get_num_targets(card, &card->n_targets); - if (st) - dev_info(CARD_TO_DEV(card), - "Failed reading the number of DMA targets\n"); - - card->ctrl = kcalloc(card->n_targets, sizeof(*card->ctrl), - GFP_KERNEL); - if (!card->ctrl) { - st = -ENOMEM; - goto failed_dma_setup; - } - - st = rsxx_dma_setup(card); - if (st) { - dev_info(CARD_TO_DEV(card), - "Failed to setup DMA engine\n"); - goto failed_dma_setup; - } - - /************* Setup Card Event Handler *************/ - card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event"); - if (!card->event_wq) { - dev_err(CARD_TO_DEV(card), "Failed card event setup.\n"); - st = -ENOMEM; - goto failed_event_handler; - } - - INIT_WORK(&card->event_work, card_event_handler); - - st = rsxx_setup_dev(card); - if (st) - goto failed_create_dev; - - rsxx_get_card_state(card, &card->state); - - dev_info(CARD_TO_DEV(card), - "card state: %s\n", - rsxx_card_state_to_str(card->state)); - - /* - * Now that the DMA Engine and devices have been setup, - * we can enable the event interrupt(it kicks off actions in - * those layers so we couldn't enable it right away.) - */ - spin_lock_irq(&card->irq_lock); - rsxx_enable_ier_and_isr(card, CR_INTR_EVENT); - spin_unlock_irq(&card->irq_lock); - - if (card->state == CARD_STATE_SHUTDOWN) { - st = rsxx_issue_card_cmd(card, CARD_CMD_STARTUP); - if (st) - dev_crit(CARD_TO_DEV(card), - "Failed issuing card startup\n"); - if (sync_start) { - sync_timeout = SYNC_START_TIMEOUT; - - dev_info(CARD_TO_DEV(card), - "Waiting for card to startup\n"); - - do { - ssleep(1); - sync_timeout--; - - rsxx_get_card_state(card, &card->state); - } while (sync_timeout && - (card->state == CARD_STATE_STARTING)); - - if (card->state == CARD_STATE_STARTING) { - dev_warn(CARD_TO_DEV(card), - "Card startup timed out\n"); - card->size8 = 0; - } else { - dev_info(CARD_TO_DEV(card), - "card state: %s\n", - rsxx_card_state_to_str(card->state)); - st = rsxx_get_card_size8(card, &card->size8); - if (st) - card->size8 = 0; - } - } - } else if (card->state == CARD_STATE_GOOD || - card->state == CARD_STATE_RD_ONLY_FAULT) { - st = rsxx_get_card_size8(card, &card->size8); - if (st) - card->size8 = 0; - } - - st = rsxx_attach_dev(card); - if (st) - goto failed_create_dev; - - /************* Setup Debugfs *************/ - rsxx_debugfs_dev_new(card); - - return 0; - -failed_create_dev: - destroy_workqueue(card->event_wq); - card->event_wq = NULL; -failed_event_handler: - rsxx_dma_destroy(card); -failed_dma_setup: -failed_compatiblity_check: - destroy_workqueue(card->creg_ctrl.creg_wq); - card->creg_ctrl.creg_wq = NULL; -failed_creg_setup: - spin_lock_irq(&card->irq_lock); - rsxx_disable_ier_and_isr(card, CR_INTR_ALL); - spin_unlock_irq(&card->irq_lock); - free_irq(dev->irq, card); - if (!force_legacy) - pci_disable_msi(dev); -failed_irq: - pci_iounmap(dev, card->regmap); -failed_iomap: - pci_release_regions(dev); -failed_request_regions: -failed_dma_mask: - pci_disable_device(dev); -failed_enable: - ida_free(&rsxx_disk_ida, card->disk_id); -failed_ida_get: - kfree(card); - - return st; -} - -static void rsxx_pci_remove(struct pci_dev *dev) -{ - struct rsxx_cardinfo *card = pci_get_drvdata(dev); - unsigned long flags; - int st; - int i; - - if (!card) - return; - - dev_info(CARD_TO_DEV(card), - "Removing PCI-Flash SSD.\n"); - - rsxx_detach_dev(card); - - for (i = 0; i < card->n_targets; i++) { - spin_lock_irqsave(&card->irq_lock, flags); - rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i)); - spin_unlock_irqrestore(&card->irq_lock, flags); - } - - st = card_shutdown(card); - if (st) - dev_crit(CARD_TO_DEV(card), "Shutdown failed!\n"); - - /* Sync outstanding event handlers. */ - spin_lock_irqsave(&card->irq_lock, flags); - rsxx_disable_ier_and_isr(card, CR_INTR_EVENT); - spin_unlock_irqrestore(&card->irq_lock, flags); - - cancel_work_sync(&card->event_work); - - destroy_workqueue(card->event_wq); - rsxx_destroy_dev(card); - rsxx_dma_destroy(card); - destroy_workqueue(card->creg_ctrl.creg_wq); - - spin_lock_irqsave(&card->irq_lock, flags); - rsxx_disable_ier_and_isr(card, CR_INTR_ALL); - spin_unlock_irqrestore(&card->irq_lock, flags); - - /* Prevent work_structs from re-queuing themselves. */ - card->halt = 1; - - debugfs_remove_recursive(card->debugfs_dir); - - free_irq(dev->irq, card); - - if (!force_legacy) - pci_disable_msi(dev); - - rsxx_creg_destroy(card); - - pci_iounmap(dev, card->regmap); - - pci_disable_device(dev); - pci_release_regions(dev); - - ida_free(&rsxx_disk_ida, card->disk_id); - kfree(card); -} - -static int rsxx_pci_suspend(struct pci_dev *dev, pm_message_t state) -{ - /* We don't support suspend at this time. */ - return -ENOSYS; -} - -static void rsxx_pci_shutdown(struct pci_dev *dev) -{ - struct rsxx_cardinfo *card = pci_get_drvdata(dev); - unsigned long flags; - int i; - - if (!card) - return; - - dev_info(CARD_TO_DEV(card), "Shutting down PCI-Flash SSD.\n"); - - rsxx_detach_dev(card); - - for (i = 0; i < card->n_targets; i++) { - spin_lock_irqsave(&card->irq_lock, flags); - rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i)); - spin_unlock_irqrestore(&card->irq_lock, flags); - } - - card_shutdown(card); -} - -static const struct pci_error_handlers rsxx_err_handler = { - .error_detected = rsxx_error_detected, - .slot_reset = rsxx_slot_reset, -}; - -static const struct pci_device_id rsxx_pci_ids[] = { - {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS70_FLASH)}, - {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS80_FLASH)}, - {0,}, -}; - -MODULE_DEVICE_TABLE(pci, rsxx_pci_ids); - -static struct pci_driver rsxx_pci_driver = { - .name = DRIVER_NAME, - .id_table = rsxx_pci_ids, - .probe = rsxx_pci_probe, - .remove = rsxx_pci_remove, - .suspend = rsxx_pci_suspend, - .shutdown = rsxx_pci_shutdown, - .err_handler = &rsxx_err_handler, -}; - -static int __init rsxx_core_init(void) -{ - int st; - - st = rsxx_dev_init(); - if (st) - return st; - - st = rsxx_dma_init(); - if (st) - goto dma_init_failed; - - st = rsxx_creg_init(); - if (st) - goto creg_init_failed; - - return pci_register_driver(&rsxx_pci_driver); - -creg_init_failed: - rsxx_dma_cleanup(); -dma_init_failed: - rsxx_dev_cleanup(); - - return st; -} - -static void __exit rsxx_core_cleanup(void) -{ - pci_unregister_driver(&rsxx_pci_driver); - rsxx_creg_cleanup(); - rsxx_dma_cleanup(); - rsxx_dev_cleanup(); -} - -module_init(rsxx_core_init); -module_exit(rsxx_core_cleanup); |