From b7efe646b66e617ff968cb69bad33308c3a2c06a Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Fri, 23 Oct 2009 23:36:02 +0100 Subject: ws/i965: clone the i915 winsys I'll want to rework this, not sure trying to share this code is a very good idea at least until the interfaces from the two drivers calm down. --- src/gallium/winsys/drm/i965/gem/intel_drm_fence.c | 81 +++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 src/gallium/winsys/drm/i965/gem/intel_drm_fence.c (limited to 'src/gallium/winsys/drm/i965/gem/intel_drm_fence.c') diff --git a/src/gallium/winsys/drm/i965/gem/intel_drm_fence.c b/src/gallium/winsys/drm/i965/gem/intel_drm_fence.c new file mode 100644 index 0000000000..e70bfe7b44 --- /dev/null +++ b/src/gallium/winsys/drm/i965/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; +} -- cgit v1.2.3