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drm/nouveau/fence/g84-: protect against concurrent access to semaphore buffers

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[ Upstream commit 96692b097ba76d0c637ae8af47b29c73da33c9d0 ]

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Skeggs 2017-05-23 21:54:09 -04:00 committed by Greg Kroah-Hartman
parent cf336eea80
commit c33f1bd7f2
2 changed files with 7 additions and 0 deletions
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1
drivers/gpu/drm/nouveau/nouveau_fence.h
View File

@ -100,6 +100,7 @@ struct nv84_fence_priv {
struct nouveau_bo *bo;
struct nouveau_bo *bo_gart;
u32 *suspend;
struct mutex mutex;
};
u64 nv84_fence_crtc(struct nouveau_channel *, int);

6
drivers/gpu/drm/nouveau/nv84_fence.c
View File

@ -121,8 +121,10 @@ nv84_fence_context_del(struct nouveau_channel *chan)
}
nouveau_bo_wr32(priv->bo, chan->chid * 16 / 4, fctx->base.sequence);
mutex_lock(&priv->mutex);
nouveau_bo_vma_del(priv->bo, &fctx->vma_gart);
nouveau_bo_vma_del(priv->bo, &fctx->vma);
mutex_unlock(&priv->mutex);
nouveau_fence_context_del(&fctx->base);
chan->fence = NULL;
nouveau_fence_context_free(&fctx->base);
@ -148,11 +150,13 @@ nv84_fence_context_new(struct nouveau_channel *chan)
fctx->base.sync32 = nv84_fence_sync32;
fctx->base.sequence = nv84_fence_read(chan);
mutex_lock(&priv->mutex);
ret = nouveau_bo_vma_add(priv->bo, cli->vm, &fctx->vma);
if (ret == 0) {
ret = nouveau_bo_vma_add(priv->bo_gart, cli->vm,
&fctx->vma_gart);
}
mutex_unlock(&priv->mutex);
/* map display semaphore buffers into channel's vm */
for (i = 0; !ret && i < chan->drm->dev->mode_config.num_crtc; i++) {
@ -232,6 +236,8 @@ nv84_fence_create(struct nouveau_drm *drm)
priv->base.context_base = fence_context_alloc(priv->base.contexts);
priv->base.uevent = true;
mutex_init(&priv->mutex);
/* Use VRAM if there is any ; otherwise fallback to system memory */
domain = drm->device.info.ram_size != 0 ? TTM_PL_FLAG_VRAM :
/*