Similar to the virtio_net patch, this converts the
block driver from draft III. The virtio config space
here contains the block device size and the
max_hw_segments setting.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
Index: linux-2.6/drivers/block/virtio_blk.c
===================================================================
--- linux-2.6.orig/drivers/block/virtio_blk.c
+++ linux-2.6/drivers/block/virtio_blk.c
@@ -66,7 +66,7 @@ static bool finish(struct virtio_blk *vb
* they might still have read access after we free them. */
static bool blk_out_done(struct virtio_device *vdev)
{
- struct virtio_blk *vblk = vdev->priv;
+ struct virtio_blk *vblk = vdev->dev.driver_data;
struct virtblk_req *vbr;
unsigned int len, finished = 0;
unsigned long flags;
@@ -86,7 +86,7 @@ static bool blk_out_done(struct virtio_d
static bool blk_in_done(struct virtio_device *vdev)
{
- struct virtio_blk *vblk = vdev->priv;
+ struct virtio_blk *vblk = vdev->dev.driver_data;
struct virtblk_req *vbr;
unsigned int len, finished = 0;
unsigned long flags;
@@ -290,22 +290,20 @@ static int virtblk_ioctl(struct inode *i
(void __user *)data);
}
-static struct virtio_driver_ops virtblk_ops = {
- .in = blk_in_done,
- .out = blk_out_done,
-};
-
-
static struct block_device_operations virtblk_fops = {
.ioctl = virtblk_ioctl,
.owner = THIS_MODULE,
};
-struct gendisk *virtblk_probe(struct virtio_device *vdev)
+static int virtblk_probe(struct device *dev)
{
+ struct virtio_device *vdev = to_virtio_dev(dev);
struct virtio_blk *vblk;
+ struct virtio_blk_config *config;
int err, major;
+ config = (void *)&vdev->config.driver;
+
vblk = kmalloc(sizeof(*vblk), GFP_KERNEL);
if (!vblk) {
err = -ENOMEM;
@@ -315,8 +313,7 @@ struct gendisk *virtblk_probe(struct vir
INIT_LIST_HEAD(&vblk->reqs);
spin_lock_init(&vblk->lock);
vblk->vdev = vdev;
- vdev->priv = vblk;
- vdev->driver_ops = &virtblk_ops;
+ vdev->dev.driver_data = vblk;
vblk->pool = mempool_create_kmalloc_pool(1,sizeof(struct virtblk_req));
if (!vblk->pool) {
@@ -350,10 +347,12 @@ struct gendisk *virtblk_probe(struct vir
vblk->disk->fops = &virtblk_fops;
blk_queue_ordered(vblk->disk->queue, QUEUE_ORDERED_TAG, NULL);
+ set_capacity(vblk->disk, config->capacity);
+ blk_queue_max_hw_segments(vblk->disk->queue, config->max_hw_segments);
/* Caller can do blk_queue_max_hw_segments(), set_capacity()
* etc then add_disk(). */
- return vblk->disk;
+ return 0;
out_put_disk:
put_disk(vblk->disk);
@@ -364,13 +363,12 @@ out_mempool:
out_free_vblk:
kfree(vblk);
out:
- return ERR_PTR(err);
+ return err;
}
-EXPORT_SYMBOL_GPL(virtblk_probe);
-void virtblk_remove(struct gendisk *disk)
+static int virtblk_remove(struct device *dev)
{
- struct virtio_blk *vblk = disk->private_data;
+ struct virtio_blk *vblk = dev->driver_data;
int major = vblk->disk->major;
BUG_ON(!list_empty(&vblk->reqs));
@@ -379,5 +377,36 @@ void virtblk_remove(struct gendisk *disk
unregister_blkdev(major, "virtblk");
mempool_destroy(vblk->pool);
kfree(vblk);
+ return 0;
}
-EXPORT_SYMBOL_GPL(virtblk_remove);
+
+static struct virtio_device_id virtblk_ids[] = {
+ { .device_type = "block" },
+ { },
+};
+
+static struct virtio_driver virtblk_driver = {
+ .drv = {
+ .name = "virtblk",
+ .owner = THIS_MODULE,
+ .probe = virtblk_probe,
+ .remove = virtblk_remove,
+ },
+ .ids = virtblk_ids,
+ .in = blk_in_done,
+ .out = blk_out_done,
+};
+
+static int __init virtblk_init(void)
+{
+ return virtio_driver_register(&virtblk_driver);
+}
+module_init(virtblk_init);
+
+static void __exit virtblk_exit(void)
+{
+ virtio_driver_unregister(&virtblk_driver);
+}
+module_exit(virtblk_exit);
+
+MODULE_LICENSE("GPL");
Index: linux-2.6/include/linux/virtio_blk.h
===================================================================
--- linux-2.6.orig/include/linux/virtio_blk.h
+++ linux-2.6/include/linux/virtio_blk.h
@@ -29,11 +29,10 @@ struct virtio_blk_inhdr
unsigned char status;
};
-#ifdef __KERNEL__
-struct gendisk;
-struct virtio_device;
+struct virtio_blk_config
+{
+ unsigned long long capacity;
+ unsigned long max_hw_segments;
+};
-struct gendisk *virtblk_probe(struct virtio_device *vdev);
-void virtblk_remove(struct gendisk *disk);
-#endif /* __KERNEL__ */
#endif /* _LINUX_VIRTIO_BLK_H */
--
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