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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 
     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 }
     96