diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2016-11-05 14:33:14 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2016-11-07 14:05:13 +1000 |
| commit | b27add13f500469127afdf011dbcc9c649e16e54 (patch) | |
| tree | 29f3d0087452fdcf7166d83c82a936af26f3e8e0 | |
| parent | e137040e0d0376b404fc5155eba44ea07126e3bd (diff) | |
drm/nouveau/fifo/gf100-: protect channel preempt with subdev mutex
This avoids an issue that occurs when we're attempting to preempt multiple
channels simultaneously. HW seems to ignore preempt requests while it's
still processing a previous one, which, well, makes sense.
Fixes random "fifo: SCHED_ERROR 0d []" + GPCCS page faults during parallel
piglit runs on (at least) GM107.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogf100.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogk104.c | 8 |
2 files changed, 11 insertions, 6 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogf100.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogf100.c index cbc67f262322..12d964260a29 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogf100.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogf100.c @@ -60,6 +60,7 @@ gf100_fifo_gpfifo_engine_fini(struct nvkm_fifo_chan *base, struct nvkm_gpuobj *inst = chan->base.inst; int ret = 0; + mutex_lock(&subdev->mutex); nvkm_wr32(device, 0x002634, chan->base.chid); if (nvkm_msec(device, 2000, if (nvkm_rd32(device, 0x002634) == chan->base.chid) @@ -67,10 +68,12 @@ gf100_fifo_gpfifo_engine_fini(struct nvkm_fifo_chan *base, ) < 0) { nvkm_error(subdev, "channel %d [%s] kick timeout\n", chan->base.chid, chan->base.object.client->name); - ret = -EBUSY; - if (suspend) - return ret; + ret = -ETIMEDOUT; } + mutex_unlock(&subdev->mutex); + + if (ret && suspend) + return ret; if (offset) { nvkm_kmap(inst); diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogk104.c index ed4351032ed6..a2df4f3e7763 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogk104.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogk104.c @@ -40,7 +40,9 @@ gk104_fifo_gpfifo_kick(struct gk104_fifo_chan *chan) struct nvkm_subdev *subdev = &fifo->base.engine.subdev; struct nvkm_device *device = subdev->device; struct nvkm_client *client = chan->base.object.client; + int ret = 0; + mutex_lock(&subdev->mutex); nvkm_wr32(device, 0x002634, chan->base.chid); if (nvkm_msec(device, 2000, if (!(nvkm_rd32(device, 0x002634) & 0x00100000)) @@ -48,10 +50,10 @@ gk104_fifo_gpfifo_kick(struct gk104_fifo_chan *chan) ) < 0) { nvkm_error(subdev, "channel %d [%s] kick timeout\n", chan->base.chid, client->name); - return -EBUSY; + ret = -ETIMEDOUT; } - - return 0; + mutex_unlock(&subdev->mutex); + return ret; } static u32 |