src/mesa/drivers/dri/i965/brw_reset.c

   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 "brw_context.h"
  27
  28 /**
  29  * Query information about GPU resets observed by this context
  30  *
  31  * Called via \c dd_function_table::GetGraphicsResetStatus.
  32  */
  33 GLenum
  34 brw_get_graphics_reset_status(struct gl_context *ctx)
  35 {
  36    struct brw_context *brw = brw_context(ctx);
  37    int err;
  38    uint32_t reset_count;
  39    uint32_t active;
  40    uint32_t pending;
  41
  42    /* If hardware contexts are not being used (or
  43     * DRM_IOCTL_I915_GET_RESET_STATS is not supported), this function should
  44     * not be accessible.
  45     */
  46    assert(brw->hw_ctx != NULL);
  47
  48    /* A reset status other than NO_ERROR was returned last time. I915 returns
  49     * nonzero active/pending only if reset has been encountered and completed.
  50     * Return NO_ERROR from now on.
  51     */
  52    if (brw->reset_count != 0)
  53       return GL_NO_ERROR;
  54
  55    err = drm_intel_get_reset_stats(brw->hw_ctx, &reset_count, &active,
  56                                    &pending);
  57    if (err)
  58       return GL_NO_ERROR;
  59
  60    /* A reset was observed while a batch from this context was executing.
  61     * Assume that this context was at fault.
  62     */
  63    if (active != 0) {
  64       brw->reset_count = reset_count;
  65       return GL_GUILTY_CONTEXT_RESET_ARB;
  66    }
  67
  68    /* A reset was observed while a batch from this context was in progress,
  69     * but the batch was not executing.  In this case, assume that the context
  70     * was not at fault.
  71     */
  72    if (pending != 0) {
  73       brw->reset_count = reset_count;
  74       return GL_INNOCENT_CONTEXT_RESET_ARB;
  75    }
  76
  77    return GL_NO_ERROR;
  78 }
  79
  80 void
  81 brw_check_for_reset(struct brw_context *brw)
  82 {
  83    uint32_t reset_count;
  84    uint32_t active;
  85    uint32_t pending;
  86    int err;
  87
  88    err = drm_intel_get_reset_stats(brw->hw_ctx, &reset_count, &active,
  89                                    &pending);
  90    if (err)
  91       return;
  92
  93    if (active > 0 || pending > 0)
  94       _mesa_set_context_lost_dispatch(&brw->ctx);
  95 }