From 702c8f8e5daba24777b29899fb9576fe64a924ea Mon Sep 17 00:00:00 2001 From: Michel Thierry Date: Tue, 20 Jun 2017 10:57:48 +0100 Subject: [PATCH] drm/i915: Add engine reset count to error state Driver maintains count of how many times a given engine is reset, useful to capture this in error state also. It gives an idea of how engine is coping up with the workloads it is executing before this error state. A follow-up patch will provide this information in debugfs. v2: s/engine_reset/reset_engine/ (Chris) Define count as unsigned int (Tvrtko) Cc: Chris Wilson Cc: Mika Kuoppala Signed-off-by: Arun Siluvery Signed-off-by: Michel Thierry Link: http://patchwork.freedesktop.org/patch/msgid/20170615201828.23144-7-michel.thierry@intel.com Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/20170620095751.13127-7-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_drv.c | 3 +++ drivers/gpu/drm/i915/i915_drv.h | 10 ++++++++++ drivers/gpu/drm/i915/i915_gpu_error.c | 3 +++ 3 files changed, 16 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 2ecac000e5da..d35a114c46ed 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1971,7 +1971,10 @@ int i915_reset_engine(struct intel_engine_cs *engine) * process to program RING_MODE, HWSP and re-enable submission. */ ret = engine->init_hw(engine); + if (ret) + goto out; + error->reset_engine_count[engine->id]++; out: return ret; } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 152e30750dd4..90cc63e5ced8 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -917,6 +917,7 @@ struct i915_gpu_state { enum intel_engine_hangcheck_action hangcheck_action; struct i915_address_space *vm; int num_requests; + u32 reset_count; /* position of active request inside the ring */ u32 rq_head, rq_post, rq_tail; @@ -1567,6 +1568,9 @@ struct i915_gpu_error { #define I915_WEDGED (BITS_PER_LONG - 1) #define I915_RESET_ENGINE (I915_WEDGED - I915_NUM_ENGINES) + /** Number of times an engine has been reset */ + u32 reset_engine_count[I915_NUM_ENGINES]; + /** * Waitqueue to signal when a hang is detected. Used to for waiters * to release the struct_mutex for the reset to procede. @@ -3474,6 +3478,12 @@ static inline u32 i915_reset_count(struct i915_gpu_error *error) return READ_ONCE(error->reset_count); } +static inline u32 i915_reset_engine_count(struct i915_gpu_error *error, + struct intel_engine_cs *engine) +{ + return READ_ONCE(error->reset_engine_count[engine->id]); +} + struct drm_i915_gem_request * i915_gem_reset_prepare_engine(struct intel_engine_cs *engine); int i915_gem_reset_prepare(struct drm_i915_private *dev_priv); diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index e18f350bc364..ae70283470a6 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -463,6 +463,7 @@ static void error_print_engine(struct drm_i915_error_state_buf *m, err_printf(m, " hangcheck action timestamp: %lu, %u ms ago\n", ee->hangcheck_timestamp, jiffies_to_msecs(jiffies - ee->hangcheck_timestamp)); + err_printf(m, " engine reset count: %u\n", ee->reset_count); error_print_request(m, " ELSP[0]: ", &ee->execlist[0]); error_print_request(m, " ELSP[1]: ", &ee->execlist[1]); @@ -1236,6 +1237,8 @@ static void error_record_engine_registers(struct i915_gpu_state *error, ee->hangcheck_timestamp = engine->hangcheck.action_timestamp; ee->hangcheck_action = engine->hangcheck.action; ee->hangcheck_stalled = engine->hangcheck.stalled; + ee->reset_count = i915_reset_engine_count(&dev_priv->gpu_error, + engine); if (USES_PPGTT(dev_priv)) { int i; -- 2.20.1