Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch

[mirror_ubuntu-hirsute-kernel.git] / drivers / block / rsxx / core.c

/*
* Filename: core.c
*
*
* Authors: Joshua Morris <josh.h.morris@us.ibm.com>
*       Philip Kelleher <pjk1939@linux.vnet.ibm.com>
*
* (C) Copyright 2013 IBM Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#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/genhd.h>
#include <linux/idr.h>

#include "rsxx_priv.h"
#include "rsxx_cfg.h"

#define NO_LEGACY 0

MODULE_DESCRIPTION("IBM FlashSystem 70/80 PCIe SSD 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 DEFINE_IDA(rsxx_disk_ida);
static DEFINE_SPINLOCK(rsxx_ida_lock);

/*----------------- 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) {
                        schedule_work(&card->creg_ctrl.done_work);
                        handled++;
                }

                if (isr & CR_INTR_EVENT) {
                        schedule_work(&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 * const 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.
                 */
        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");
                /* Fall through. */

        /* 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 FlashSystem 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)
                        pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
                                            card->ctrl[i].status.buf,
                                            card->ctrl[i].status.dma_addr);
                if (card->ctrl[i].cmd.buf)
                        pci_free_consistent(card->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;

        dev_err(&dev->dev, "IBM FlashSystem PCI: disabling failed card.\n");

        card->eeh_state = 1;

        for (i = 0; i < card->n_targets; i++)
                del_timer_sync(&card->ctrl[i].activity_timer);

        rsxx_eeh_cancel_dmas(card);
}

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,
                                            enum pci_channel_state 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 FlashSystem 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;

        st = rsxx_eeh_remap_dmas(card);
        if (st)
                goto failed_remap_dmas;

        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 FlashSystem PCI: recovery complete.\n");

        return PCI_ERS_RESULT_RECOVERED;

failed_hw_buffers_init:
failed_remap_dmas:
        for (i = 0; i < card->n_targets; i++) {
                if (card->ctrl[i].status.buf)
                        pci_free_consistent(card->dev,
                                        STATUS_BUFFER_SIZE8,
                                        card->ctrl[i].status.buf,
                                        card->ctrl[i].status.dma_addr);
                if (card->ctrl[i].cmd.buf)
                        pci_free_consistent(card->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;

        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);

        do {
                if (!ida_pre_get(&rsxx_disk_ida, GFP_KERNEL)) {
                        st = -ENOMEM;
                        goto failed_ida_get;
                }

                spin_lock(&rsxx_ida_lock);
                st = ida_get_new(&rsxx_disk_ida, &card->disk_id);
                spin_unlock(&rsxx_ida_lock);
        } while (st == -EAGAIN);

        if (st)
                goto failed_ida_get;

        st = pci_enable_device(dev);
        if (st)
                goto failed_enable;

        pci_set_master(dev);
        pci_set_dma_max_seg_size(dev, RSXX_HW_BLK_SIZE);

        st = pci_set_dma_mask(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_DISABLED | 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 *************/
        rsxx_creg_setup(card);

        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 = kzalloc(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 *************/
        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");
        } 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;
        }

        rsxx_attach_dev(card);

        return 0;

failed_create_dev:
        rsxx_dma_destroy(card);
failed_dma_setup:
failed_compatiblity_check:
        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:
        spin_lock(&rsxx_ida_lock);
        ida_remove(&rsxx_disk_ida, card->disk_id);
        spin_unlock(&rsxx_ida_lock);
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);

        rsxx_destroy_dev(card);
        rsxx_dma_destroy(card);

        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;

        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);

        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 DEFINE_PCI_DEVICE_TABLE(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);