| /* |
| * Copyright © 2008 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| * |
| * Authors: |
| * Eric Anholt <eric@anholt.net> |
| * |
| */ |
| |
| /** @file intel_syncobj.c |
| * |
| * Support for ARB_sync |
| * |
| * ARB_sync is implemented by flushing the current batchbuffer and keeping a |
| * reference on it. We can then check for completion or wait for compeltion |
| * using the normal buffer object mechanisms. This does mean that if an |
| * application is using many sync objects, it will emit small batchbuffers |
| * which may end up being a significant overhead. In other tests of removing |
| * gratuitous batchbuffer syncs in Mesa, it hasn't appeared to be a significant |
| * performance bottleneck, though. |
| */ |
| |
| #include "main/simple_list.h" |
| #include "main/imports.h" |
| |
| #include "intel_context.h" |
| #include "intel_batchbuffer.h" |
| #include "intel_reg.h" |
| |
| static struct gl_sync_object * |
| intel_new_sync_object(struct gl_context *ctx, GLuint id) |
| { |
| struct intel_sync_object *sync; |
| |
| sync = calloc(1, sizeof(struct intel_sync_object)); |
| |
| return &sync->Base; |
| } |
| |
| static void |
| intel_delete_sync_object(struct gl_context *ctx, struct gl_sync_object *s) |
| { |
| struct intel_sync_object *sync = (struct intel_sync_object *)s; |
| |
| drm_intel_bo_unreference(sync->bo); |
| free(sync); |
| } |
| |
| static void |
| intel_fence_sync(struct gl_context *ctx, struct gl_sync_object *s, |
| GLenum condition, GLbitfield flags) |
| { |
| struct intel_context *intel = intel_context(ctx); |
| struct intel_sync_object *sync = (struct intel_sync_object *)s; |
| |
| assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE); |
| intel_batchbuffer_emit_mi_flush(intel->batch); |
| |
| sync->bo = intel->batch->buf; |
| drm_intel_bo_reference(sync->bo); |
| |
| intel_flush(ctx); |
| } |
| |
| /* We ignore the user-supplied timeout. This is weaselly -- we're allowed to |
| * round to an implementation-dependent accuracy, and right now our |
| * implementation "rounds" to the wait-forever value. |
| * |
| * The fix would be a new kernel function to do the GTT transition with a |
| * timeout. |
| */ |
| static void intel_client_wait_sync(struct gl_context *ctx, struct gl_sync_object *s, |
| GLbitfield flags, GLuint64 timeout) |
| { |
| struct intel_sync_object *sync = (struct intel_sync_object *)s; |
| |
| if (sync->bo) { |
| drm_intel_bo_wait_rendering(sync->bo); |
| s->StatusFlag = 1; |
| drm_intel_bo_unreference(sync->bo); |
| sync->bo = NULL; |
| } |
| } |
| |
| /* We have nothing to do for WaitSync. Our GL command stream is sequential, |
| * so given that the sync object has already flushed the batchbuffer, |
| * any batchbuffers coming after this waitsync will naturally not occur until |
| * the previous one is done. |
| */ |
| static void intel_server_wait_sync(struct gl_context *ctx, struct gl_sync_object *s, |
| GLbitfield flags, GLuint64 timeout) |
| { |
| } |
| |
| static void intel_check_sync(struct gl_context *ctx, struct gl_sync_object *s) |
| { |
| struct intel_sync_object *sync = (struct intel_sync_object *)s; |
| |
| if (sync->bo && !drm_intel_bo_busy(sync->bo)) { |
| drm_intel_bo_unreference(sync->bo); |
| sync->bo = NULL; |
| s->StatusFlag = 1; |
| } |
| } |
| |
| void intel_init_syncobj_functions(struct dd_function_table *functions) |
| { |
| functions->NewSyncObject = intel_new_sync_object; |
| functions->DeleteSyncObject = intel_delete_sync_object; |
| functions->FenceSync = intel_fence_sync; |
| functions->CheckSync = intel_check_sync; |
| functions->ClientWaitSync = intel_client_wait_sync; |
| functions->ServerWaitSync = intel_server_wait_sync; |
| } |