linux-kernel - [PATCH v2 2/2] drm/virtio: set max

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Date:   Tue, 18 Aug 2020 11:20:17 +0200
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     christian.koenig@....com, Gerd Hoffmann <kraxel@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        virtualization@...ts.linux-foundation.org (open list:VIRTIO GPU DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 2/2] drm/virtio: set max_segment

When initializing call virtio_max_dma_size() to figure the scatter list
limit.  Needed to make virtio-gpu work properly with SEV.

v2: place max_segment in drm driver not gem object.

Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/gpu/drm/virtio/virtgpu_kms.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index bf060c69850f..5a4364c00fae 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -114,6 +114,7 @@ int virtio_gpu_init(struct drm_device *dev)
 
 	vgdev->ddev = dev;
 	dev->dev_private = vgdev;
+	dev->max_segment = virtio_max_dma_size(vgdev->vdev);
 	vgdev->vdev = dev_to_virtio(dev->dev);
 	vgdev->dev = dev->dev;
 
-- 
2.18.4