iris: add identifier BO
A buffer added to all execbufs so that we can attribute a batch that caused a hang to a particular driver. v2: Reuse workaround BO Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3203>
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@ -398,6 +398,11 @@ iris_batch_reset(struct iris_batch *batch)
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iris_cache_sets_clear(batch);
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/* Always add the workaround BO, it contains a driver identifier at the
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* beginning quite helpful to debug error states.
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*/
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iris_use_pinned_bo(batch, screen->workaround_bo, false);
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iris_batch_maybe_noop(batch);
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}
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@ -663,6 +663,27 @@ iris_detect_kernel_features(struct iris_screen *screen)
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screen->kernel_features |= KERNEL_HAS_WAIT_FOR_SUBMIT;
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}
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static bool
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iris_init_identifier_bo(struct iris_screen *screen)
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{
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void *bo_map;
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bo_map = iris_bo_map(NULL, screen->workaround_bo, MAP_READ | MAP_WRITE);
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if (!bo_map)
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return false;
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screen->workaround_bo->kflags |= EXEC_OBJECT_CAPTURE;
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screen->workaround_address = (struct iris_address) {
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.bo = screen->workaround_bo,
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.offset = ALIGN(
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intel_debug_write_identifiers(bo_map, 4096, "Iris") + 8, 8),
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};
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iris_bo_unmap(screen->workaround_bo);
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return true;
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}
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struct pipe_screen *
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iris_screen_create(int fd, const struct pipe_screen_config *config)
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{
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@ -718,10 +739,8 @@ iris_screen_create(int fd, const struct pipe_screen_config *config)
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if (!screen->workaround_bo)
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return NULL;
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screen->workaround_address = (struct iris_address) {
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.bo = screen->workaround_bo,
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.offset = 0,
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};
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if (!iris_init_identifier_bo(screen))
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return NULL;
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brw_process_intel_debug_variable();
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@ -192,8 +192,12 @@ struct iris_screen {
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const struct gen_l3_config *l3_config_cs;
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/**
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* A buffer containing nothing useful, for hardware workarounds that
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* require scratch writes or reads from some unimportant memory.
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* A buffer containing a marker + description of the driver. This buffer is
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* added to all execbufs syscalls so that we can identify the driver that
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* generated a hang by looking at the content of the buffer in the error
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* state. It is also used for hardware workarounds that require scratch
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* writes or reads from some unimportant memory. To avoid overriding the
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* debug data, use the workaround_address field for workarounds.
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*/
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struct iris_bo *workaround_bo;
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struct iris_address workaround_address;
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