search for: nouveau_need_cache_sync

...at nvidia.com: make conditional and platform-friendly] > Signed-off-by: Alexandre Courbot <acourbot at nvidia.com> Perhaps having a propery commit message here would be good. > diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c [...] > +#ifdef NOUVEAU_NEED_CACHE_SYNC > +void > +nouveau_bo_sync_for_cpu(struct nouveau_bo *nvbo) > +{ > + struct nouveau_device *device; > + struct ttm_tt *ttm = nvbo->bo.ttm; > + > + device = nouveau_dev(nouveau_bdev(ttm->bdev)->dev); > + > + if (nvbo->bo.ttm && nvbo->bo.ttm->cachi...

...ruptible, { int ret; + nouveau_bo_sync_for_device(nvbo); + ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement, interruptible, no_wait_gpu); if (ret) @@ -487,6 +489,36 @@ nouveau_bo_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags) return 0; } +#ifdef NOUVEAU_NEED_CACHE_SYNC +void +nouveau_bo_sync_for_cpu(struct nouveau_bo *nvbo) +{ + struct nouveau_device *device; + struct ttm_tt *ttm = nvbo->bo.ttm; + + device = nouveau_dev(nouveau_bdev(ttm->bdev)->dev); + + if (nvbo->bo.ttm && nvbo->bo.ttm->caching_state == tt_cached) + ttm_dma_tt_cache_sy...

This small series introduces TTM helper functions as well as Nouveau hooks that are needed to ensure buffer coherency on ARM. Most of this series is a forward-port of some patches Lucas Stach sent last year and that are also needed for Nouveau GK20A support: http://lists.freedesktop.org/archives/nouveau/2013-August/014026.html Another patch takes care of flushing the CPU write-buffer when

...or_device(nvbo); > + > ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement, > interruptible, no_wait_gpu); > if (ret) > @@ -487,6 +489,36 @@ nouveau_bo_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags) > return 0; > } > > +#ifdef NOUVEAU_NEED_CACHE_SYNC I don't like this ifdef at all. I know calling this functions will add a little overhead to x86 where it isn't strictly required, but I think it's negligible. When I looked at them the dma_sync_single_for_[device|cpu] functions which are called here map out to just a drain of the PCI...