diff options
| author | Alexandre Courbot <acourbot@nvidia.com> | 2015-02-20 12:22:59 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2015-04-14 10:00:42 +0300 |
| commit | eaecf0326f096faaba462eae48a3b30bcb1f7009 (patch) | |
| tree | da4d31cc0d0a867786e2cca541d6a89a1541c921 /drivers/gpu/drm/nouveau/nv84_fence.c | |
| parent | c6a7b026a3a80662d8f7bb6b4f7821329aa7111b (diff) | |
| download | linux-eaecf0326f096faaba462eae48a3b30bcb1f7009.tar.xz | |
make RAM device optional
Having a RAM device does not make sense for chips like GK20A which have
no dedicated video memory. The dummy RAM device that we used so far
works as a temporary band-aid, but in the longer term it is desirable
for the driver to be able to work without any kind of VRAM.
This patch adds a few conditionals in places where a RAM device was
assumed to be present and allows some more objects to be allocated from
the TT domain, allowing Nouveau to handle GPUs for which
pfb->ram == NULL.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv84_fence.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv84_fence.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/gpu/drm/nouveau/nv84_fence.c b/drivers/gpu/drm/nouveau/nv84_fence.c index bf429cabbaa8..a03db4368696 100644 --- a/drivers/gpu/drm/nouveau/nv84_fence.c +++ b/drivers/gpu/drm/nouveau/nv84_fence.c @@ -215,6 +215,7 @@ nv84_fence_create(struct nouveau_drm *drm) { struct nvkm_fifo *pfifo = nvxx_fifo(&drm->device); struct nv84_fence_priv *priv; + u32 domain; int ret; priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); @@ -231,10 +232,17 @@ nv84_fence_create(struct nouveau_drm *drm) priv->base.context_base = fence_context_alloc(priv->base.contexts); priv->base.uevent = true; - ret = nouveau_bo_new(drm->dev, 16 * priv->base.contexts, 0, - TTM_PL_FLAG_VRAM, 0, 0, NULL, NULL, &priv->bo); + /* Use VRAM if there is any ; otherwise fallback to system memory */ + domain = drm->device.info.ram_size != 0 ? TTM_PL_FLAG_VRAM : + /* + * fences created in sysmem must be non-cached or we + * will lose CPU/GPU coherency! + */ + TTM_PL_FLAG_TT | TTM_PL_FLAG_UNCACHED; + ret = nouveau_bo_new(drm->dev, 16 * priv->base.contexts, 0, domain, 0, + 0, NULL, NULL, &priv->bo); if (ret == 0) { - ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false); + ret = nouveau_bo_pin(priv->bo, domain, false); if (ret == 0) { ret = nouveau_bo_map(priv->bo); if (ret) |