lkml.org 
[lkml]   [2007]   [Jul]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[patch 1/3] ps3: Disk Storage Driver
    From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>

    Add a Disk Storage Driver for the PS3:
    - Implemented as a block device driver with a dynamic major
    - Disk names (and partitions) are of the format ps3d%c(%u)
    - Uses software scatter-gather with a 64 KiB bounce buffer as the hypervisor
    doesn't support scatter-gather

    CC: Geoff Levand <geoffrey.levand@am.sony.com>
    Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
    Acked-by: Jens Axboe <jens.axboe@oracle.com>
    ---
    v4:
    - Replace KM_USER0 by KM_IRQ0 (all kmap routines are either called from an
    interrupt handler or from .request_fn())
    - Add a call to flush_kernel_dcache_page() before kunmap in routines that
    write to buffers
    v3:
    - Cleanup #includes
    - Kill PS3DISK_MAJOR, always use zero to obtain a dynamic major
    - Group LV1 API related stuff
    - Kill empty ps3disk_open
    - Reset ps3disk_priv(dev) to NULL during cleanup
    - Move call to put_disk() down
    - Pass the interrupt handler to ps3stor_setup(), so it doesn't have to be
    overridden later
    - Fold ps3disk_read_write_sectors() into ps3disk_submit_request_sg()
    - Identify the hard drive capacity and model name during probing

    v2:
    - Don't use `default y' in Kconfig
    - Remove the thread for handling requests
    - Set up sysfs links between block device and PS3 system device:
    o /sys/block/ps3da/device -> ../../devices/ps3_system/sb_02
    o /sys/devices/ps3_system/sb_02/block:ps3da -> ../../../block/ps3da
    - Fix all FIXMEs
    - Implement proper barrier support
    - Call add_disk_randomness()
    - Add a test to verify we are running on a PS3
    - Fix error path in ps3disk_init()
    - Fix cleanup order in ps3disk_exit()

    arch/powerpc/platforms/ps3/Kconfig | 10
    drivers/block/Makefile | 1
    drivers/block/ps3disk.c | 624 +++++++++++++++++++++++++++++++++++++
    3 files changed, 635 insertions(+)
    --- a/arch/powerpc/platforms/ps3/Kconfig
    +++ b/arch/powerpc/platforms/ps3/Kconfig
    @@ -102,4 +102,14 @@ config PS3_STORAGE
    depends on PPC_PS3
    tristate

    +config PS3_DISK
    + tristate "PS3 Disk Storage Driver"
    + depends on PPC_PS3 && BLOCK
    + select PS3_STORAGE
    + help
    + Include support for the PS3 Disk Storage.
    +
    + This support is required to access the PS3 hard disk.
    + In general, all users will say Y or M.
    +
    endmenu
    --- a/drivers/block/Makefile
    +++ b/drivers/block/Makefile
    @@ -28,3 +28,4 @@ obj-$(CONFIG_VIODASD) += viodasd.o
    obj-$(CONFIG_BLK_DEV_SX8) += sx8.o
    obj-$(CONFIG_BLK_DEV_UB) += ub.o

    +obj-$(CONFIG_PS3_DISK) += ps3disk.o
    --- /dev/null
    +++ b/drivers/block/ps3disk.c
    @@ -0,0 +1,624 @@
    +/*
    + * PS3 Disk Storage Driver
    + *
    + * Copyright (C) 2007 Sony Computer Entertainment Inc.
    + * Copyright 2007 Sony Corp.
    + *
    + * 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; version 2 of the License.
    + *
    + * 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.,
    + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
    + */
    +
    +#include <linux/ata.h>
    +#include <linux/blkdev.h>
    +
    +#include <asm/lv1call.h>
    +#include <asm/ps3stor.h>
    +#include <asm/firmware.h>
    +
    +
    +#define DEVICE_NAME "ps3disk"
    +
    +#define BOUNCE_SIZE (64*1024)
    +
    +#define PS3DISK_MAX_DISKS 16
    +#define PS3DISK_MINORS 16
    +
    +#define KERNEL_SECTOR_SIZE 512
    +
    +
    +#define PS3DISK_NAME "ps3d%c"
    +
    +
    +struct ps3disk_private {
    + spinlock_t lock; /* Request queue spinlock */
    + struct request_queue *queue;
    + struct gendisk *gendisk;
    + unsigned int blocking_factor;
    + struct request *req;
    + u64 raw_capacity;
    + unsigned char model[ATA_ID_PROD_LEN+1];
    +};
    +#define ps3disk_priv(dev) ((dev)->sbd.core.driver_data)
    +
    +
    +#define LV1_STORAGE_SEND_ATA_COMMAND (2)
    +#define LV1_STORAGE_ATA_HDDOUT (0x23)
    +
    +struct lv1_ata_cmnd_block {
    + u16 features;
    + u16 sector_count;
    + u16 LBA_low;
    + u16 LBA_mid;
    + u16 LBA_high;
    + u8 device;
    + u8 command;
    + u32 is_ext;
    + u32 proto;
    + u32 in_out;
    + u32 size;
    + u64 buffer;
    + u32 arglen;
    +};
    +
    +enum lv1_ata_proto {
    + NON_DATA_PROTO = 0,
    + PIO_DATA_IN_PROTO = 1,
    + PIO_DATA_OUT_PROTO = 2,
    + DMA_PROTO = 3
    +};
    +
    +enum lv1_ata_in_out {
    + DIR_WRITE = 0, /* memory -> device */
    + DIR_READ = 1 /* device -> memory */
    +};
    +
    +static int ps3disk_major;
    +
    +
    +static struct block_device_operations ps3disk_fops = {
    + .owner = THIS_MODULE,
    +};
    +
    +
    +static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
    + struct request *req, int gather)
    +{
    + unsigned int sectors = 0, offset = 0;
    + struct bio *bio;
    + sector_t sector;
    + struct bio_vec *bvec;
    + unsigned int i = 0, j;
    + size_t size;
    + void *buf;
    +
    + rq_for_each_bio(bio, req) {
    + sector = bio->bi_sector;
    + dev_dbg(&dev->sbd.core,
    + "%s:%u: bio %u: %u segs %u sectors from %lu\n",
    + __func__, __LINE__, i, bio_segments(bio),
    + bio_sectors(bio), sector);
    + bio_for_each_segment(bvec, bio, j) {
    + size = bio_cur_sectors(bio)*KERNEL_SECTOR_SIZE;
    + buf = __bio_kmap_atomic(bio, j, KM_IRQ0);
    + if (gather)
    + memcpy(dev->bounce_buf+offset, buf, size);
    + else
    + memcpy(buf, dev->bounce_buf+offset, size);
    + offset += size;
    + flush_kernel_dcache_page(bio_iovec_idx(bio, j)->bv_page);
    + __bio_kunmap_atomic(bio, KM_IRQ0);
    + }
    + sectors += bio_sectors(bio);
    + i++;
    + }
    +}
    +
    +static int ps3disk_submit_request_sg(struct ps3_storage_device *dev,
    + struct request *req)
    +{
    + struct ps3disk_private *priv = ps3disk_priv(dev);
    + int write = rq_data_dir(req), res;
    + const char *op = write ? "write" : "read";
    + u64 start_sector, sectors;
    + unsigned int region_id = dev->regions[dev->region_idx].id;
    +
    +#ifdef DEBUG
    + unsigned int n = 0;
    + struct bio *bio;
    + rq_for_each_bio(bio, req)
    + n++;
    + dev_dbg(&dev->sbd.core,
    + "%s:%u: %s req has %u bios for %lu sectors %lu hard sectors\n",
    + __func__, __LINE__, op, n, req->nr_sectors,
    + req->hard_nr_sectors);
    +#endif
    +
    + start_sector = req->sector*priv->blocking_factor;
    + sectors = req->nr_sectors*priv->blocking_factor;
    + dev_dbg(&dev->sbd.core, "%s:%u: %s %lu sectors starting at %lu\n",
    + __func__, __LINE__, op, sectors, start_sector);
    +
    + if (write) {
    + ps3disk_scatter_gather(dev, req, 1);
    +
    + res = lv1_storage_write(dev->sbd.dev_id, region_id,
    + start_sector, sectors, 0,
    + dev->bounce_lpar, &dev->tag);
    + } else {
    + res = lv1_storage_read(dev->sbd.dev_id, region_id,
    + start_sector, sectors, 0,
    + dev->bounce_lpar, &dev->tag);
    + }
    + if (res) {
    + dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
    + __LINE__, op, res);
    + end_request(req, 0);
    + return 0;
    + }
    +
    + priv->req = req;
    + return 1;
    +}
    +
    +static int ps3disk_submit_flush_request(struct ps3_storage_device *dev,
    + struct request *req)
    +{
    + struct ps3disk_private *priv = ps3disk_priv(dev);
    + u64 res;
    +
    + dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__);
    +
    + res = lv1_storage_send_device_command(dev->sbd.dev_id,
    + LV1_STORAGE_ATA_HDDOUT, 0, 0, 0,
    + 0, &dev->tag);
    + if (res) {
    + dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%lx\n",
    + __func__, __LINE__, res);
    + end_request(req, 0);
    + return 0;
    + }
    +
    + priv->req = req;
    + return 1;
    +}
    +
    +static void ps3disk_do_request(struct ps3_storage_device *dev,
    + request_queue_t *q)
    +{
    + struct request *req;
    +
    + dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
    +
    + while ((req = elv_next_request(q))) {
    + if (blk_fs_request(req)) {
    + if (ps3disk_submit_request_sg(dev, req))
    + break;
    + } else if (req->cmd_type == REQ_TYPE_FLUSH) {
    + if (ps3disk_submit_flush_request(dev, req))
    + break;
    + } else {
    + blk_dump_rq_flags(req, DEVICE_NAME " bad request");
    + end_request(req, 0);
    + continue;
    + }
    + }
    +}
    +
    +static void ps3disk_request(request_queue_t *q)
    +{
    + struct ps3_storage_device *dev = q->queuedata;
    + struct ps3disk_private *priv = ps3disk_priv(dev);
    +
    + if (priv->req) {
    + dev_dbg(&dev->sbd.core, "%s:%u busy\n", __func__, __LINE__);
    + return;
    + }
    +
    + ps3disk_do_request(dev, q);
    +}
    +
    +static irqreturn_t ps3disk_interrupt(int irq, void *data)
    +{
    + struct ps3_storage_device *dev = data;
    + struct ps3disk_private *priv;
    + struct request *req;
    + int res, read, uptodate;
    + u64 tag, status;
    + unsigned long num_sectors;
    + const char *op;
    +
    + res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
    +
    + if (tag != dev->tag)
    + dev_err(&dev->sbd.core,
    + "%s:%u: tag mismatch, got %lx, expected %lx\n",
    + __func__, __LINE__, tag, dev->tag);
    +
    + if (res) {
    + dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%lx\n",
    + __func__, __LINE__, res, status);
    + return IRQ_HANDLED;
    + }
    +
    + priv = ps3disk_priv(dev);
    + req = priv->req;
    + if (!req) {
    + dev_dbg(&dev->sbd.core,
    + "%s:%u non-block layer request completed\n", __func__,
    + __LINE__);
    + dev->lv1_status = status;
    + complete(&dev->done);
    + return IRQ_HANDLED;
    + }
    +
    + if (req->cmd_type == REQ_TYPE_FLUSH) {
    + read = 0;
    + num_sectors = req->hard_cur_sectors;
    + op = "flush";
    + } else {
    + read = !rq_data_dir(req);
    + num_sectors = req->nr_sectors;
    + op = read ? "read" : "write";
    + }
    + if (status) {
    + dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%lx\n", __func__,
    + __LINE__, op, status);
    + uptodate = 0;
    + } else {
    + dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
    + __LINE__, op);
    + uptodate = 1;
    + if (read)
    + ps3disk_scatter_gather(dev, req, 0);
    + }
    +
    + spin_lock(&priv->lock);
    + if (!end_that_request_first(req, uptodate, num_sectors)) {
    + add_disk_randomness(req->rq_disk);
    + blkdev_dequeue_request(req);
    + end_that_request_last(req, uptodate);
    + }
    + priv->req = NULL;
    + ps3disk_do_request(dev, priv->queue);
    + spin_unlock(&priv->lock);
    +
    + return IRQ_HANDLED;
    +}
    +
    +static int ps3disk_sync_cache(struct ps3_storage_device *dev)
    +{
    + u64 res;
    +
    + dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
    +
    + res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
    + if (res) {
    + dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%lx\n",
    + __func__, __LINE__, res);
    + return -EIO;
    + }
    + return 0;
    +}
    +
    +
    +/* ATA helpers copied from drivers/ata/libata-core.c */
    +
    +static void swap_buf_le16(u16 *buf, unsigned int buf_words)
    +{
    +#ifdef __BIG_ENDIAN
    + unsigned int i;
    +
    + for (i = 0; i < buf_words; i++)
    + buf[i] = le16_to_cpu(buf[i]);
    +#endif /* __BIG_ENDIAN */
    +}
    +
    +static u64 ata_id_n_sectors(const u16 *id)
    +{
    + if (ata_id_has_lba(id)) {
    + if (ata_id_has_lba48(id))
    + return ata_id_u64(id, 100);
    + else
    + return ata_id_u32(id, 60);
    + } else {
    + if (ata_id_current_chs_valid(id))
    + return ata_id_u32(id, 57);
    + else
    + return id[1] * id[3] * id[6];
    + }
    +}
    +
    +static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
    + unsigned int len)
    +{
    + unsigned int c;
    +
    + while (len > 0) {
    + c = id[ofs] >> 8;
    + *s = c;
    + s++;
    +
    + c = id[ofs] & 0xff;
    + *s = c;
    + s++;
    +
    + ofs++;
    + len -= 2;
    + }
    +}
    +
    +static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
    + unsigned int len)
    +{
    + unsigned char *p;
    +
    + WARN_ON(!(len & 1));
    +
    + ata_id_string(id, s, ofs, len - 1);
    +
    + p = s + strnlen(s, len - 1);
    + while (p > s && p[-1] == ' ')
    + p--;
    + *p = '\0';
    +}
    +
    +static int ps3disk_identify(struct ps3_storage_device *dev)
    +{
    + struct ps3disk_private *priv = ps3disk_priv(dev);
    + struct lv1_ata_cmnd_block ata_cmnd;
    + u16 *id = dev->bounce_buf;
    + u64 res;
    +
    + dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
    +
    + memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
    + ata_cmnd.command = ATA_CMD_ID_ATA;
    + ata_cmnd.sector_count = 1;
    + ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
    + ata_cmnd.buffer = dev->bounce_lpar;
    + ata_cmnd.proto = PIO_DATA_IN_PROTO;
    + ata_cmnd.in_out = DIR_READ;
    +
    + res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
    + ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
    + sizeof(ata_cmnd), ata_cmnd.buffer,
    + ata_cmnd.arglen);
    + if (res) {
    + dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%lx\n",
    + __func__, __LINE__, res);
    + return -EIO;
    + }
    +
    + swap_buf_le16(id, ATA_ID_WORDS);
    +
    + /* All we're interested in are raw capacity and model name */
    + priv->raw_capacity = ata_id_n_sectors(id);
    + ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
    + return 0;
    +}
    +
    +static void ps3disk_prepare_flush(request_queue_t *q, struct request *req)
    +{
    + struct ps3_storage_device *dev = q->queuedata;
    +
    + dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
    +
    + memset(req->cmd, 0, sizeof(req->cmd));
    + req->cmd_type = REQ_TYPE_FLUSH;
    +}
    +
    +static int ps3disk_issue_flush(request_queue_t *q, struct gendisk *gendisk,
    + sector_t *sector)
    +{
    + struct ps3_storage_device *dev = q->queuedata;
    + struct request *req;
    + int res;
    +
    + dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
    +
    + req = blk_get_request(q, WRITE, __GFP_WAIT);
    + ps3disk_prepare_flush(q, req);
    + res = blk_execute_rq(q, gendisk, req, 0);
    + if (res)
    + dev_err(&dev->sbd.core, "%s:%u: flush request failed %d\n",
    + __func__, __LINE__, res);
    + blk_put_request(req);
    + return res;
    +}
    +
    +
    +static unsigned long ps3disk_mask;
    +
    +static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
    +{
    + struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
    + struct ps3disk_private *priv;
    + int error;
    + unsigned int devidx;
    + struct request_queue *queue;
    + struct gendisk *gendisk;
    +
    + if (dev->blk_size < KERNEL_SECTOR_SIZE) {
    + dev_err(&dev->sbd.core,
    + "%s:%u: cannot handle block size %lu\n", __func__,
    + __LINE__, dev->blk_size);
    + return -EINVAL;
    + }
    +
    + BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
    + devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
    + if (devidx >= PS3DISK_MAX_DISKS) {
    + dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
    + __LINE__);
    + return -ENOSPC;
    + }
    + __set_bit(devidx, &ps3disk_mask);
    +
    + priv = kzalloc(sizeof(*priv), GFP_KERNEL);
    + if (!priv) {
    + error = -ENOMEM;
    + goto fail;
    + }
    +
    + ps3disk_priv(dev) = priv;
    + spin_lock_init(&priv->lock);
    +
    + dev->bounce_size = BOUNCE_SIZE;
    + dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
    + if (!dev->bounce_buf) {
    + error = -ENOMEM;
    + goto fail_free_priv;
    + }
    +
    + error = ps3stor_setup(dev, ps3disk_interrupt);
    + if (error)
    + goto fail_free_bounce;
    +
    + ps3disk_identify(dev);
    +
    + queue = blk_init_queue(ps3disk_request, &priv->lock);
    + if (!queue) {
    + dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
    + __func__, __LINE__);
    + error = -ENOMEM;
    + goto fail_teardown;
    + }
    +
    + priv->queue = queue;
    + queue->queuedata = dev;
    +
    + blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
    +
    + blk_queue_max_sectors(queue, dev->bounce_size/KERNEL_SECTOR_SIZE);
    + blk_queue_segment_boundary(queue, -1UL);
    + blk_queue_dma_alignment(queue, dev->blk_size-1);
    + blk_queue_hardsect_size(queue, dev->blk_size);
    +
    + blk_queue_issue_flush_fn(queue, ps3disk_issue_flush);
    + blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
    + ps3disk_prepare_flush);
    +
    + blk_queue_max_phys_segments(queue, -1);
    + blk_queue_max_hw_segments(queue, -1);
    + blk_queue_max_segment_size(queue, dev->bounce_size);
    +
    + gendisk = alloc_disk(PS3DISK_MINORS);
    + if (!gendisk) {
    + dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
    + __LINE__);
    + error = -ENOMEM;
    + goto fail_cleanup_queue;
    + }
    +
    + priv->gendisk = gendisk;
    + gendisk->major = ps3disk_major;
    + gendisk->first_minor = devidx * PS3DISK_MINORS;
    + gendisk->fops = &ps3disk_fops;
    + gendisk->queue = queue;
    + gendisk->private_data = dev;
    + gendisk->driverfs_dev = &dev->sbd.core;
    + snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
    + devidx+'a');
    + priv->blocking_factor = dev->blk_size/KERNEL_SECTOR_SIZE;
    + set_capacity(gendisk,
    + dev->regions[dev->region_idx].size*priv->blocking_factor);
    +
    + dev_info(&dev->sbd.core,
    + "%s is a %s (%lu MiB total, %lu MiB for OtherOS)\n",
    + gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
    + get_capacity(gendisk) >> 11);
    +
    + add_disk(gendisk);
    + return 0;
    +
    +fail_cleanup_queue:
    + blk_cleanup_queue(queue);
    +fail_teardown:
    + ps3stor_teardown(dev);
    +fail_free_bounce:
    + kfree(dev->bounce_buf);
    +fail_free_priv:
    + kfree(priv);
    + ps3disk_priv(dev) = NULL;
    +fail:
    + __clear_bit(devidx, &ps3disk_mask);
    + return error;
    +}
    +
    +static int ps3disk_remove(struct ps3_system_bus_device *_dev)
    +{
    + struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
    + struct ps3disk_private *priv = ps3disk_priv(dev);
    +
    + __clear_bit(priv->gendisk->first_minor / PS3DISK_MINORS,
    + &ps3disk_mask);
    + del_gendisk(priv->gendisk);
    + blk_cleanup_queue(priv->queue);
    + put_disk(priv->gendisk);
    + dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
    + ps3disk_sync_cache(dev);
    + ps3stor_teardown(dev);
    + kfree(dev->bounce_buf);
    + kfree(priv);
    + ps3disk_priv(dev) = NULL;
    + return 0;
    +}
    +
    +static struct ps3_system_bus_driver ps3disk = {
    + .match_id = PS3_MATCH_ID_STOR_DISK,
    + .core.name = DEVICE_NAME,
    + .core.owner = THIS_MODULE,
    + .probe = ps3disk_probe,
    + .remove = ps3disk_remove,
    + .shutdown = ps3disk_remove,
    +};
    +
    +
    +static int __init ps3disk_init(void)
    +{
    + int error;
    +
    + if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
    + return -ENODEV;
    +
    + error = register_blkdev(0, DEVICE_NAME);
    + if (error <= 0) {
    + printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
    + __LINE__, error);
    + return error;
    + }
    + ps3disk_major = error;
    +
    + pr_info("%s:%u: registered block device major %d\n", __func__,
    + __LINE__, ps3disk_major);
    +
    + error = ps3_system_bus_driver_register(&ps3disk);
    + if (error)
    + unregister_blkdev(ps3disk_major, DEVICE_NAME);
    +
    + return error;
    +}
    +
    +static void __exit ps3disk_exit(void)
    +{
    + ps3_system_bus_driver_unregister(&ps3disk);
    + unregister_blkdev(ps3disk_major, DEVICE_NAME);
    +}
    +
    +module_init(ps3disk_init);
    +module_exit(ps3disk_exit);
    +
    +MODULE_LICENSE("GPL");
    +MODULE_DESCRIPTION("PS3 Disk Storage Driver");
    +MODULE_AUTHOR("Sony Corporation");
    +MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);
    --
    With kind regards,

    Geert Uytterhoeven
    Software Architect

    Sony Network and Software Technology Center Europe
    The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium

    Phone: +32 (0)2 700 8453
    Fax: +32 (0)2 700 8622
    E-mail: Geert.Uytterhoeven@sonycom.com
    Internet: http://www.sony-europe.com/

    Sony Network and Software Technology Center Europe
    A division of Sony Service Centre (Europe) N.V.
    Registered office: Technologielaan 7 · B-1840 Londerzeel · Belgium
    VAT BE 0413.825.160 · RPR Brussels
    Fortis Bank Zaventem · Swift GEBABEBB08A · IBAN BE39001382358619

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-07-16 18:27    [from the cache]
    ©2003-2014 Jasper Spaans. hosted at Digital Ocean