diff options
| -rw-r--r-- | shared-core/nouveau_fifo.c | 43 |
1 files changed, 29 insertions, 14 deletions
diff --git a/shared-core/nouveau_fifo.c b/shared-core/nouveau_fifo.c index 8e93207e..d8fda277 100644 --- a/shared-core/nouveau_fifo.c +++ b/shared-core/nouveau_fifo.c @@ -390,6 +390,34 @@ nouveau_fifo_alloc(struct drm_device *dev, struct nouveau_channel **chan_ret, return 0; } +static int +nouveau_channel_idle(struct nouveau_channel *chan) +{ + struct drm_device *dev = chan->dev; + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_engine *engine = &dev_priv->Engine; + uint32_t caches; + int idle; + + caches = NV_READ(NV03_PFIFO_CACHES); + NV_WRITE(NV03_PFIFO_CACHES, caches & ~1); + + if (engine->fifo.channel_id(dev) != chan->id) { + struct nouveau_gpuobj *ramfc = chan->ramfc->gpuobj; + + if (INSTANCE_RD(ramfc, 0) != INSTANCE_RD(ramfc, 1)) + idle = 0; + else + idle = 1; + } else { + idle = (NV_READ(NV04_PFIFO_CACHE1_DMA_GET) == + NV_READ(NV04_PFIFO_CACHE1_DMA_PUT)); + } + + NV_WRITE(NV03_PFIFO_CACHES, caches); + return idle; +} + /* stops a fifo */ void nouveau_fifo_free(struct nouveau_channel *chan) { @@ -400,22 +428,9 @@ void nouveau_fifo_free(struct nouveau_channel *chan) DRM_INFO("%s: freeing fifo %d\n", __func__, chan->id); - /* Disable channel switching, if this channel isn't currenly - * active re-enable it if there's still pending commands. - * We really should do a manual context switch here, but I'm - * not sure I trust our ability to do this reliably yet.. - */ - NV_WRITE(NV03_PFIFO_CACHES, 0); - if (engine->fifo.channel_id(dev) != chan->id && - NV_READ(chan->get) != NV_READ(chan->put)) { - NV_WRITE(NV03_PFIFO_CACHES, 1); - } - /* Give the channel a chance to idle, wait 2s (hopefully) */ t_start = engine->timer.read(dev); - while (NV_READ(chan->get) != NV_READ(chan->put) || - NV_READ(NV03_PFIFO_CACHE1_GET) != - NV_READ(NV03_PFIFO_CACHE1_PUT)) { + while (!nouveau_channel_idle(chan)) { if (engine->timer.read(dev) - t_start > 2000000000ULL) { DRM_ERROR("Failed to idle channel %d before destroy." "Prepare for strangeness..\n", chan->id); |