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  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. #include "brw_context.h"
  24.  
  25. /**
  26.  * Query information about GPU resets observed by this context
  27.  *
  28.  * Called via \c dd_function_table::GetGraphicsResetStatus.
  29.  */
  30. GLenum
  31. brw_get_graphics_reset_status(struct gl_context *ctx)
  32. {
  33.    struct brw_context *brw = brw_context(ctx);
  34.    int err;
  35.    uint32_t reset_count;
  36.    uint32_t active;
  37.    uint32_t pending;
  38.  
  39.    /* If hardware contexts are not being used (or
  40.     * DRM_IOCTL_I915_GET_RESET_STATS is not supported), this function should
  41.     * not be accessible.
  42.     */
  43.    assert(brw->hw_ctx != NULL);
  44.  
  45.    /* A reset status other than NO_ERROR was returned last time. I915 returns
  46.     * nonzero active/pending only if reset has been encountered and completed.
  47.     * Return NO_ERROR from now on.
  48.     */
  49.    if (brw->reset_count != 0)
  50.       return GL_NO_ERROR;
  51.  
  52.    err = drm_intel_get_reset_stats(brw->hw_ctx, &reset_count, &active,
  53.                                    &pending);
  54.    if (err)
  55.       return GL_NO_ERROR;
  56.  
  57.    /* A reset was observed while a batch from this context was executing.
  58.     * Assume that this context was at fault.
  59.     */
  60.    if (active != 0) {
  61.       brw->reset_count = reset_count;
  62.       return GL_GUILTY_CONTEXT_RESET_ARB;
  63.    }
  64.  
  65.    /* A reset was observed while a batch from this context was in progress,
  66.     * but the batch was not executing.  In this case, assume that the context
  67.     * was not at fault.
  68.     */
  69.    if (pending != 0) {
  70.       brw->reset_count = reset_count;
  71.       return GL_INNOCENT_CONTEXT_RESET_ARB;
  72.    }
  73.  
  74.    return GL_NO_ERROR;
  75. }
  76.