diff options
author | Jakob Bornecrantz <wallbraker@gmail.com> | 2009-09-01 00:42:39 +0100 |
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committer | Jakob Bornecrantz <wallbraker@gmail.com> | 2009-09-01 00:47:02 +0100 |
commit | 935e4c56e5b10a0a702d95f78e9f4e6660c452dc (patch) | |
tree | bf5b550ac5159ca9755cd269c875f9f872ae2bf2 /src/gallium/winsys/drm/intel/gem/intel_drm_fence.c | |
parent | d2110064c2075a8537d4b7f87ba894ebaa6ccb33 (diff) |
i915g: Implement new winsys
Diffstat (limited to 'src/gallium/winsys/drm/intel/gem/intel_drm_fence.c')
-rw-r--r-- | src/gallium/winsys/drm/intel/gem/intel_drm_fence.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/gallium/winsys/drm/intel/gem/intel_drm_fence.c b/src/gallium/winsys/drm/intel/gem/intel_drm_fence.c new file mode 100644 index 0000000000..e70bfe7b44 --- /dev/null +++ b/src/gallium/winsys/drm/intel/gem/intel_drm_fence.c @@ -0,0 +1,81 @@ + +#include "intel_drm_winsys.h" +#include "util/u_memory.h" +#include "pipe/p_refcnt.h" + +/** + * Because gem does not have fence's we have to create our own fences. + * + * They work by keeping the batchbuffer around and checking if that has + * been idled. If bo is NULL fence has expired. + */ +struct intel_drm_fence +{ + struct pipe_reference reference; + drm_intel_bo *bo; +}; + + +struct pipe_fence_handle * +intel_drm_fence_create(drm_intel_bo *bo) +{ + struct intel_drm_fence *fence = CALLOC_STRUCT(intel_drm_fence); + + pipe_reference_init(&fence->reference, 1); + /* bo is null if fence already expired */ + if (bo) { + drm_intel_bo_reference(bo); + fence->bo = bo; + } + + return (struct pipe_fence_handle *)fence; +} + +static void +intel_drm_fence_reference(struct intel_winsys *iws, + struct pipe_fence_handle **ptr, + struct pipe_fence_handle *fence) +{ + struct intel_drm_fence *old = (struct intel_drm_fence *)*ptr; + struct intel_drm_fence *f = (struct intel_drm_fence *)fence; + + if (pipe_reference((struct pipe_reference**)ptr, &f->reference)) { + if (old->bo) + drm_intel_bo_unreference(old->bo); + FREE(old); + } +} + +static int +intel_drm_fence_signalled(struct intel_winsys *iws, + struct pipe_fence_handle *fence) +{ + assert(0); + + return 0; +} + +static int +intel_drm_fence_finish(struct intel_winsys *iws, + struct pipe_fence_handle *fence) +{ + struct intel_drm_fence *f = (struct intel_drm_fence *)fence; + + /* fence already expired */ + if (!f->bo) + return 0; + + drm_intel_bo_wait_rendering(f->bo); + drm_intel_bo_unreference(f->bo); + f->bo = NULL; + + return 0; +} + +void +intel_drm_winsys_init_fence_functions(struct intel_drm_winsys *idws) +{ + idws->base.fence_reference = intel_drm_fence_reference; + idws->base.fence_signalled = intel_drm_fence_signalled; + idws->base.fence_finish = intel_drm_fence_finish; +} |