From 5b5ce301287fb8ef74b45fad3c10b2d4ac3a9cc6 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Mon, 11 May 2009 13:42:12 -0700 Subject: libdrm/intel: add drm_intel_bo_disable_reuse api Scanout buffers need to be freed through the kernel as it holds a reference to them; exposing this API allows applications allocating scanout buffers to flag them as not reusable. Signed-off-by: Keith Packard Reviewed-by: Eric Anholt --- libdrm/intel/intel_bufmgr_gem.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) (limited to 'libdrm/intel/intel_bufmgr_gem.c') diff --git a/libdrm/intel/intel_bufmgr_gem.c b/libdrm/intel/intel_bufmgr_gem.c index 89931d85..5ae4d668 100644 --- a/libdrm/intel/intel_bufmgr_gem.c +++ b/libdrm/intel/intel_bufmgr_gem.c @@ -165,6 +165,11 @@ struct _drm_intel_bo_gem { */ char used_as_reloc_target; + /** + * Boolean of whether this buffer can be re-used + */ + char reusable; + /** * Size in bytes of this buffer and its relocation descendents. * @@ -420,6 +425,7 @@ drm_intel_gem_bo_alloc_internal(drm_intel_bufmgr *bufmgr, const char *name, bo_gem->used_as_reloc_target = 0; bo_gem->tiling_mode = I915_TILING_NONE; bo_gem->swizzle_mode = I915_BIT_6_SWIZZLE_NONE; + bo_gem->reusable = 1; DBG("bo_create: buf %d (%s) %ldb\n", bo_gem->gem_handle, bo_gem->name, size); @@ -479,6 +485,7 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr, const char *name, bo_gem->validate_index = -1; bo_gem->gem_handle = open_arg.handle; bo_gem->global_name = handle; + bo_gem->reusable = 0; memset(&get_tiling, 0, sizeof(get_tiling)); get_tiling.handle = bo_gem->gem_handle; @@ -572,7 +579,7 @@ drm_intel_gem_bo_unreference_locked(drm_intel_bo *bo) bucket = drm_intel_gem_bo_bucket_for_size(bufmgr_gem, bo->size); /* Put the buffer into our internal cache for reuse if we can. */ tiling_mode = I915_TILING_NONE; - if (bo_gem->global_name == 0 && + if (bo_gem->reusable && bucket != NULL && (bucket->max_entries == -1 || (bucket->max_entries > 0 && @@ -1168,6 +1175,7 @@ drm_intel_gem_bo_flink(drm_intel_bo *bo, uint32_t *name) if (ret != 0) return -errno; bo_gem->global_name = flink.name; + bo_gem->reusable = 0; } *name = bo_gem->global_name; @@ -1356,6 +1364,19 @@ drm_intel_gem_check_aperture_space(drm_intel_bo **bo_array, int count) } } +/* + * Disable buffer reuse for objects which are shared with the kernel + * as scanout buffers + */ +static int +drm_intel_gem_bo_disable_reuse(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *)bo; + + bo_gem->reusable = 0; + return 0; +} + /** * Initializes the GEM buffer manager, which uses the kernel to allocate, map, * and manage map buffer objections. @@ -1437,6 +1458,7 @@ drm_intel_bufmgr_gem_init(int fd, int batch_size) bufmgr_gem->bufmgr.destroy = drm_intel_bufmgr_gem_destroy; bufmgr_gem->bufmgr.debug = 0; bufmgr_gem->bufmgr.check_aperture_space = drm_intel_gem_check_aperture_space; + bufmgr_gem->bufmgr.bo_disable_reuse = drm_intel_gem_bo_disable_reuse; /* Initialize the linked lists for BO reuse cache. */ for (i = 0; i < DRM_INTEL_GEM_BO_BUCKETS; i++) DRMINITLISTHEAD(&bufmgr_gem->cache_bucket[i].head); -- cgit v1.2.3