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 #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 }