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virtio: Add some debugging

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When QEMU does not respond for some reason, it is helpful to have
debugging info to show. Add some.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2023-01-28 15:00:17 -07:00 committed by Tom Rini
parent 4f6daaca0f
commit d472e93ab4
1 changed files with 7 additions and 0 deletions
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7
drivers/virtio/virtio_blk.c
View file

@ -4,6 +4,8 @@
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
*/
#define LOG_CATEGORY UCLASS_VIRTIO
#include <common.h>
#include <blk.h>
#include <dm.h>
@ -42,6 +44,8 @@ static ulong virtio_blk_do_req(struct udevice *dev, u64 sector,
sgs[num_out + num_in++] = &data_sg;
sgs[num_out + num_in++] = &status_sg;
log_debug("dev=%s, active=%d, priv=%p, priv->vq=%p\n", dev->name,
device_active(dev), priv, priv->vq);
ret = virtqueue_add(priv->vq, sgs, num_out, num_in);
if (ret)
@ -49,8 +53,10 @@ static ulong virtio_blk_do_req(struct udevice *dev, u64 sector,
virtqueue_kick(priv->vq);
log_debug("wait...");
while (!virtqueue_get_buf(priv->vq, NULL))
;
log_debug("done\n");
return status == VIRTIO_BLK_S_OK ? blkcnt : -EIO;
}
@ -58,6 +64,7 @@ static ulong virtio_blk_do_req(struct udevice *dev, u64 sector,
static ulong virtio_blk_read(struct udevice *dev, lbaint_t start,
lbaint_t blkcnt, void *buffer)
{
log_debug("read %s\n", dev->name);
return virtio_blk_do_req(dev, start, blkcnt, buffer,
VIRTIO_BLK_T_IN);
}