[PATCH 2/2] vdpa: vp_vdpa: don't use hard-coded maximum virtqueue size

Jason Wang
2021-07-05T07:19:10Z

This patch switch to read virtqueue size from the capability instead
of depending on the hardcoded value. This allows the per virtqueue
size could be advertised.

Signed-off-by: Jason Wang <jasowang at redhat.com>
---
 drivers/vdpa/virtio_pci/vp_vdpa.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c
b/drivers/vdpa/virtio_pci/vp_vdpa.c
index 2926641fb586..198f7076e4d9 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -18,7 +18,6 @@
 #include <linux/virtio_pci.h>
 #include <linux/virtio_pci_modern.h>

-#define VP_VDPA_QUEUE_MAX 256
 #define VP_VDPA_DRIVER_NAME "vp_vdpa"
 #define VP_VDPA_NAME_SIZE 256

@@ -197,7 +196,10 @@ static void vp_vdpa_set_status(struct vdpa_device *vdpa, u8
status)

 static u16 vp_vdpa_get_vq_num_max(struct vdpa_device *vdpa, u16 qid)
 {
-	return VP_VDPA_QUEUE_MAX;
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
+
+	return vp_modern_get_queue_size(mdev, qid);
 }

 static int vp_vdpa_get_vq_state(struct vdpa_device *vdpa, u16 qid,
--
2.25.1