1/*
2 * Copyright © 2012 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24#include "main/context.h"
25
26#include <xf86drm.h>
27#include "brw_context.h"
28
29/**
30 * Query information about GPU resets observed by this context
31 *
32 * Called via \c dd_function_table::GetGraphicsResetStatus.
33 */
34GLenum
35brw_get_graphics_reset_status(struct gl_context *ctx)
36{
37   struct brw_context *brw = brw_context(ctx);
38   struct drm_i915_reset_stats stats = { .ctx_id = brw->hw_ctx };
39
40   /* If hardware contexts are not being used (or
41    * DRM_IOCTL_I915_GET_RESET_STATS is not supported), this function should
42    * not be accessible.
43    */
44   assert(brw->hw_ctx != 0);
45
46   /* A reset status other than NO_ERROR was returned last time. I915 returns
47    * nonzero active/pending only if reset has been encountered and completed.
48    * Return NO_ERROR from now on.
49    */
50   if (brw->reset_count != 0)
51      return GL_NO_ERROR;
52
53   if (drmIoctl(brw->screen->fd, DRM_IOCTL_I915_GET_RESET_STATS, &stats) != 0)
54      return GL_NO_ERROR;
55
56   /* A reset was observed while a batch from this context was executing.
57    * Assume that this context was at fault.
58    */
59   if (stats.batch_active != 0) {
60      brw->reset_count = stats.reset_count;
61      return GL_GUILTY_CONTEXT_RESET_ARB;
62   }
63
64   /* A reset was observed while a batch from this context was in progress,
65    * but the batch was not executing.  In this case, assume that the context
66    * was not at fault.
67    */
68   if (stats.batch_pending != 0) {
69      brw->reset_count = stats.reset_count;
70      return GL_INNOCENT_CONTEXT_RESET_ARB;
71   }
72
73   return GL_NO_ERROR;
74}
75
76void
77brw_check_for_reset(struct brw_context *brw)
78{
79   struct drm_i915_reset_stats stats = { .ctx_id = brw->hw_ctx };
80
81   if (drmIoctl(brw->screen->fd, DRM_IOCTL_I915_GET_RESET_STATS, &stats) != 0)
82      return;
83
84   if (stats.batch_active > 0 || stats.batch_pending > 0)
85      _mesa_set_context_lost_dispatch(&brw->ctx);
86}
87