Implement pinning without locking in nouveau_bo_pin_locked(). Keep nouveau_bo_pin() for acquiring the buffer object's reservation lock. The new helper will be useful for implementing the GEM pin callback with correct semantics. Same for unpin. Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> --- drivers/gpu/drm/nouveau/nouveau_bo.c | 43 +++++++++++++++++++--------- drivers/gpu/drm/nouveau/nouveau_bo.h | 2 ++ 2 files changed, 32 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 56dcd25db1ce2..4a7c002a325a4 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -467,17 +467,14 @@ nouveau_bo_placement_set(struct nouveau_bo *nvbo, uint32_t domain, set_placement_range(nvbo, domain); } -int -nouveau_bo_pin(struct nouveau_bo *nvbo, uint32_t domain, bool contig) +int nouveau_bo_pin_locked(struct nouveau_bo *nvbo, uint32_t domain, bool contig) { struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev); struct ttm_buffer_object *bo = &nvbo->bo; bool force = false, evict = false; - int ret; + int ret = 0; - ret = ttm_bo_reserve(bo, false, false, NULL); - if (ret) - return ret; + dma_resv_assert_held(bo->base.resv); if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA && domain == NOUVEAU_GEM_DOMAIN_VRAM && contig) { @@ -540,20 +537,15 @@ nouveau_bo_pin(struct nouveau_bo *nvbo, uint32_t domain, bool contig) out: if (force && ret) nvbo->contig = false; - ttm_bo_unreserve(bo); return ret; } -int -nouveau_bo_unpin(struct nouveau_bo *nvbo) +void nouveau_bo_unpin_locked(struct nouveau_bo *nvbo) { struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev); struct ttm_buffer_object *bo = &nvbo->bo; - int ret; - ret = ttm_bo_reserve(bo, false, false, NULL); - if (ret) - return ret; + dma_resv_assert_held(bo->base.resv); ttm_bo_unpin(&nvbo->bo); if (!nvbo->bo.pin_count) { @@ -568,8 +560,33 @@ nouveau_bo_unpin(struct nouveau_bo *nvbo) break; } } +} + +int nouveau_bo_pin(struct nouveau_bo *nvbo, uint32_t domain, bool contig) +{ + struct ttm_buffer_object *bo = &nvbo->bo; + int ret; + ret = ttm_bo_reserve(bo, false, false, NULL); + if (ret) + return ret; + ret = nouveau_bo_pin_locked(nvbo, domain, contig); + ttm_bo_unreserve(bo); + + return ret; +} + +int nouveau_bo_unpin(struct nouveau_bo *nvbo) +{ + struct ttm_buffer_object *bo = &nvbo->bo; + int ret; + + ret = ttm_bo_reserve(bo, false, false, NULL); + if (ret) + return ret; + nouveau_bo_unpin_locked(nvbo); ttm_bo_unreserve(bo); + return 0; } diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.h b/drivers/gpu/drm/nouveau/nouveau_bo.h index e9dfab6a81560..4e891752c2551 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.h +++ b/drivers/gpu/drm/nouveau/nouveau_bo.h @@ -85,6 +85,8 @@ int nouveau_bo_new(struct nouveau_cli *, u64 size, int align, u32 domain, u32 tile_mode, u32 tile_flags, struct sg_table *sg, struct dma_resv *robj, struct nouveau_bo **); +int nouveau_bo_pin_locked(struct nouveau_bo *nvbo, uint32_t domain, bool contig); +void nouveau_bo_unpin_locked(struct nouveau_bo *nvbo); int nouveau_bo_pin(struct nouveau_bo *, u32 flags, bool contig); int nouveau_bo_unpin(struct nouveau_bo *); int nouveau_bo_map(struct nouveau_bo *); -- 2.43.2