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| 4358 | Serge | 1 | /* |
| 2 | * Copyright © 2008 Intel Corporation |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice (including the next |
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| 12 | * paragraph) shall be included in all copies or substantial portions of the |
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| 13 | * Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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| 21 | * IN THE SOFTWARE. |
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| 22 | * |
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| 23 | * Authors: |
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| 24 | * Eric Anholt |
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| 25 | * |
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| 26 | */ |
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| 27 | |||
| 28 | /** @file intel_syncobj.c |
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| 29 | * |
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| 30 | * Support for ARB_sync |
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| 31 | * |
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| 32 | * ARB_sync is implemented by flushing the current batchbuffer and keeping a |
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| 33 | * reference on it. We can then check for completion or wait for completion |
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| 34 | * using the normal buffer object mechanisms. This does mean that if an |
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| 35 | * application is using many sync objects, it will emit small batchbuffers |
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| 36 | * which may end up being a significant overhead. In other tests of removing |
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| 37 | * gratuitous batchbuffer syncs in Mesa, it hasn't appeared to be a significant |
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| 38 | * performance bottleneck, though. |
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| 39 | */ |
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| 40 | |||
| 41 | #include "main/simple_list.h" |
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| 42 | #include "main/imports.h" |
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| 43 | |||
| 44 | #include "brw_context.h" |
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| 45 | #include "intel_batchbuffer.h" |
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| 46 | #include "intel_reg.h" |
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| 47 | |||
| 48 | static struct gl_sync_object * |
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| 49 | intel_new_sync_object(struct gl_context *ctx, GLuint id) |
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| 50 | { |
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| 51 | struct intel_sync_object *sync; |
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| 52 | |||
| 53 | sync = calloc(1, sizeof(struct intel_sync_object)); |
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| 54 | |||
| 55 | return &sync->Base; |
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| 56 | } |
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| 57 | |||
| 58 | static void |
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| 59 | intel_delete_sync_object(struct gl_context *ctx, struct gl_sync_object *s) |
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| 60 | { |
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| 61 | struct intel_sync_object *sync = (struct intel_sync_object *)s; |
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| 62 | |||
| 63 | drm_intel_bo_unreference(sync->bo); |
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| 64 | free(sync); |
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| 65 | } |
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| 66 | |||
| 67 | static void |
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| 68 | intel_fence_sync(struct gl_context *ctx, struct gl_sync_object *s, |
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| 69 | GLenum condition, GLbitfield flags) |
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| 70 | { |
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| 71 | struct brw_context *brw = brw_context(ctx); |
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| 72 | struct intel_sync_object *sync = (struct intel_sync_object *)s; |
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| 73 | |||
| 74 | assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE); |
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| 75 | intel_batchbuffer_emit_mi_flush(brw); |
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| 76 | |||
| 77 | sync->bo = brw->batch.bo; |
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| 78 | drm_intel_bo_reference(sync->bo); |
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| 79 | |||
| 80 | intel_flush(ctx); |
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| 81 | } |
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| 82 | |||
| 83 | static void intel_client_wait_sync(struct gl_context *ctx, struct gl_sync_object *s, |
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| 84 | GLbitfield flags, GLuint64 timeout) |
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| 85 | { |
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| 86 | struct intel_sync_object *sync = (struct intel_sync_object *)s; |
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| 87 | |||
| 88 | if (sync->bo && drm_intel_gem_bo_wait(sync->bo, timeout) == 0) { |
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| 89 | s->StatusFlag = 1; |
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| 90 | drm_intel_bo_unreference(sync->bo); |
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| 91 | sync->bo = NULL; |
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| 92 | } |
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| 93 | } |
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| 94 | |||
| 95 | /* We have nothing to do for WaitSync. Our GL command stream is sequential, |
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| 96 | * so given that the sync object has already flushed the batchbuffer, |
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| 97 | * any batchbuffers coming after this waitsync will naturally not occur until |
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| 98 | * the previous one is done. |
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| 99 | */ |
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| 100 | static void intel_server_wait_sync(struct gl_context *ctx, struct gl_sync_object *s, |
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| 101 | GLbitfield flags, GLuint64 timeout) |
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| 102 | { |
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| 103 | } |
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| 104 | |||
| 105 | static void intel_check_sync(struct gl_context *ctx, struct gl_sync_object *s) |
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| 106 | { |
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| 107 | struct intel_sync_object *sync = (struct intel_sync_object *)s; |
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| 108 | |||
| 109 | if (sync->bo && !drm_intel_bo_busy(sync->bo)) { |
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| 110 | drm_intel_bo_unreference(sync->bo); |
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| 111 | sync->bo = NULL; |
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| 112 | s->StatusFlag = 1; |
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| 113 | } |
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| 114 | } |
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| 115 | |||
| 116 | void intel_init_syncobj_functions(struct dd_function_table *functions) |
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| 117 | { |
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| 118 | functions->NewSyncObject = intel_new_sync_object; |
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| 119 | functions->DeleteSyncObject = intel_delete_sync_object; |
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| 120 | functions->FenceSync = intel_fence_sync; |
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| 121 | functions->CheckSync = intel_check_sync; |
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| 122 | functions->ClientWaitSync = intel_client_wait_sync; |
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| 123 | functions->ServerWaitSync = intel_server_wait_sync; |
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| 124 | } |