diff options
| author | Maarten Maathuis <madman2003@gmail.com> | 2010-02-25 22:00:38 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2010-03-10 09:07:35 +0300 |
| commit | ce48fa93a6f5cadd4141a921dfb4129c8850374e (patch) | |
| tree | 550350594fdae72ff50884c18adc9fbc1377a96e | |
| parent | 81441570c9cbf453891d90f5725adbbfe5a9cc69 (diff) | |
| download | linux-ce48fa93a6f5cadd4141a921dfb4129c8850374e.tar.xz | |
drm/nv50: add a memory barrier to pushbuf submission
- This is useful for vram pushbuffers that are write combined.
- pre-nv50 has one too (in WRITE_PUT).
Signed-off-by: Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dma.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dma.c b/drivers/gpu/drm/nouveau/nouveau_dma.c index c8482a108a78..65c441a1999f 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dma.c +++ b/drivers/gpu/drm/nouveau/nouveau_dma.c @@ -190,6 +190,11 @@ nv50_dma_push(struct nouveau_channel *chan, struct nouveau_bo *bo, nouveau_bo_wr32(pb, ip++, upper_32_bits(offset) | length << 8); chan->dma.ib_put = (chan->dma.ib_put + 1) & chan->dma.ib_max; + + DRM_MEMORYBARRIER(); + /* Flush writes. */ + nouveau_bo_rd32(pb, 0); + nvchan_wr32(chan, 0x8c, chan->dma.ib_put); chan->dma.ib_free--; } |