linux-kernel - [PATCH 2/7] virtio-pci library: switch to use vp_modern_map_vq

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Date:   Thu, 15 Apr 2021 03:31:42 -0400
From:   Jason Wang <jasowang@...hat.com>
To:     mst@...hat.com, jasowang@...hat.com
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, elic@...dia.com
Subject: [PATCH 2/7] virtio-pci library: switch to use vp_modern_map_vq_notify()

This patch switch to use vp_modern_map_notify() for virtio-pci
library.

Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/virtio/virtio_pci_modern.c | 27 ++-------------------------
 1 file changed, 2 insertions(+), 25 deletions(-)

diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index fbd4ebc00eb6..29607d9bd95c 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -192,7 +192,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
 
 	struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
 	struct virtqueue *vq;
-	u16 num, off;
+	u16 num;
 	int err;
 
 	if (index >= vp_modern_get_num_queues(mdev))
@@ -208,9 +208,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
 		return ERR_PTR(-EINVAL);
 	}
 
-	/* get offset of notification word for this vq */
-	off = vp_modern_get_queue_notify_off(mdev, index);
-
 	info->msix_vector = msix_vec;
 
 	/* create the vring */
@@ -227,27 +224,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
 				virtqueue_get_avail_addr(vq),
 				virtqueue_get_used_addr(vq));
 
-	if (mdev->notify_base) {
-		/* offset should not wrap */
-		if ((u64)off * mdev->notify_offset_multiplier + 2
-		    > mdev->notify_len) {
-			dev_warn(&mdev->pci_dev->dev,
-				 "bad notification offset %u (x %u) "
-				 "for queue %u > %zd",
-				 off, mdev->notify_offset_multiplier,
-				 index, mdev->notify_len);
-			err = -EINVAL;
-			goto err_map_notify;
-		}
-		vq->priv = (void __force *)mdev->notify_base +
-			off * mdev->notify_offset_multiplier;
-	} else {
-		vq->priv = (void __force *)vp_modern_map_capability(mdev,
-							  mdev->notify_map_cap, 2, 2,
-							  off * mdev->notify_offset_multiplier, 2,
-							  NULL);
-	}
-
+	vq->priv = vp_modern_map_vq_notify(mdev, index);
 	if (!vq->priv) {
 		err = -ENOMEM;
 		goto err_map_notify;
-- 
2.18.1