| Message ID | 20210624070516.21893-36-matthew.brost@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | GuC submission support | expand |
On 6/24/2021 00:05, Matthew Brost wrote: > GuC will issue a reset on detecting an engine hang and will notify > the driver via a G2H message. The driver will service the notification > by resetting the guilty context to a simple state or banning it > completely. > > Cc: Matthew Brost <matthew.brost@intel.com> > Cc: John Harrison <John.C.Harrison@Intel.com> > Signed-off-by: Matthew Brost <matthew.brost@intel.com> > --- > drivers/gpu/drm/i915/gt/uc/intel_guc.h | 2 ++ > drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 3 ++ > .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 35 +++++++++++++++++++ > drivers/gpu/drm/i915/i915_trace.h | 10 ++++++ > 4 files changed, 50 insertions(+) > > diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h > index 85ef6767f13b..e94b0ef733da 100644 > --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h > +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h > @@ -262,6 +262,8 @@ int intel_guc_deregister_done_process_msg(struct intel_guc *guc, > const u32 *msg, u32 len); > int intel_guc_sched_done_process_msg(struct intel_guc *guc, > const u32 *msg, u32 len); > +int intel_guc_context_reset_process_msg(struct intel_guc *guc, > + const u32 *msg, u32 len); > > void intel_guc_submission_reset_prepare(struct intel_guc *guc); > void intel_guc_submission_reset(struct intel_guc *guc, bool stalled); > diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c > index 4ed074df88e5..a2020373b8e8 100644 > --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c > +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c > @@ -945,6 +945,9 @@ static int ct_process_request(struct intel_guc_ct *ct, struct ct_incoming_msg *r > case INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_DONE: > ret = intel_guc_sched_done_process_msg(guc, payload, len); > break; > + case INTEL_GUC_ACTION_CONTEXT_RESET_NOTIFICATION: > + ret = intel_guc_context_reset_process_msg(guc, payload, len); > + break; > default: > ret = -EOPNOTSUPP; > break; > diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c > index 16b61fe71b07..9845c5bd9832 100644 > --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c > +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c > @@ -2192,6 +2192,41 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc, > return 0; > } > > +static void guc_context_replay(struct intel_context *ce) > +{ > + struct i915_sched_engine *sched_engine = ce->engine->sched_engine; > + > + __guc_reset_context(ce, true); > + tasklet_hi_schedule(&sched_engine->tasklet); > +} > + > +static void guc_handle_context_reset(struct intel_guc *guc, > + struct intel_context *ce) > +{ > + trace_intel_context_reset(ce); > + guc_context_replay(ce); > +} > + > +int intel_guc_context_reset_process_msg(struct intel_guc *guc, > + const u32 *msg, u32 len) > +{ > + struct intel_context *ce; > + int desc_idx = msg[0]; Should do this dereference after checking the length? Or is it guaranteed that the length cannot be zero? John. > + > + if (unlikely(len != 1)) { > + drm_dbg(&guc_to_gt(guc)->i915->drm, "Invalid length %u", len); > + return -EPROTO; > + } > + > + ce = g2h_context_lookup(guc, desc_idx); > + if (unlikely(!ce)) > + return -EPROTO; > + > + guc_handle_context_reset(guc, ce); > + > + return 0; > +} > + > void intel_guc_log_submission_info(struct intel_guc *guc, > struct drm_printer *p) > { > diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h > index 97c2e83984ed..c095c4d39456 100644 > --- a/drivers/gpu/drm/i915/i915_trace.h > +++ b/drivers/gpu/drm/i915/i915_trace.h > @@ -929,6 +929,11 @@ DECLARE_EVENT_CLASS(intel_context, > __entry->guc_sched_state_no_lock) > ); > > +DEFINE_EVENT(intel_context, intel_context_reset, > + TP_PROTO(struct intel_context *ce), > + TP_ARGS(ce) > +); > + > DEFINE_EVENT(intel_context, intel_context_register, > TP_PROTO(struct intel_context *ce), > TP_ARGS(ce) > @@ -1026,6 +1031,11 @@ trace_i915_request_out(struct i915_request *rq) > { > } > > +static inline void > +trace_intel_context_reset(struct intel_context *ce) > +{ > +} > + > static inline void > trace_intel_context_register(struct intel_context *ce) > {
On Mon, Jul 12, 2021 at 03:58:12PM -0700, John Harrison wrote: > On 6/24/2021 00:05, Matthew Brost wrote: > > GuC will issue a reset on detecting an engine hang and will notify > > the driver via a G2H message. The driver will service the notification > > by resetting the guilty context to a simple state or banning it > > completely. > > > > Cc: Matthew Brost <matthew.brost@intel.com> > > Cc: John Harrison <John.C.Harrison@Intel.com> > > Signed-off-by: Matthew Brost <matthew.brost@intel.com> > > --- > > drivers/gpu/drm/i915/gt/uc/intel_guc.h | 2 ++ > > drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 3 ++ > > .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 35 +++++++++++++++++++ > > drivers/gpu/drm/i915/i915_trace.h | 10 ++++++ > > 4 files changed, 50 insertions(+) > > > > diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h > > index 85ef6767f13b..e94b0ef733da 100644 > > --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h > > +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h > > @@ -262,6 +262,8 @@ int intel_guc_deregister_done_process_msg(struct intel_guc *guc, > > const u32 *msg, u32 len); > > int intel_guc_sched_done_process_msg(struct intel_guc *guc, > > const u32 *msg, u32 len); > > +int intel_guc_context_reset_process_msg(struct intel_guc *guc, > > + const u32 *msg, u32 len); > > void intel_guc_submission_reset_prepare(struct intel_guc *guc); > > void intel_guc_submission_reset(struct intel_guc *guc, bool stalled); > > diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c > > index 4ed074df88e5..a2020373b8e8 100644 > > --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c > > +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c > > @@ -945,6 +945,9 @@ static int ct_process_request(struct intel_guc_ct *ct, struct ct_incoming_msg *r > > case INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_DONE: > > ret = intel_guc_sched_done_process_msg(guc, payload, len); > > break; > > + case INTEL_GUC_ACTION_CONTEXT_RESET_NOTIFICATION: > > + ret = intel_guc_context_reset_process_msg(guc, payload, len); > > + break; > > default: > > ret = -EOPNOTSUPP; > > break; > > diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c > > index 16b61fe71b07..9845c5bd9832 100644 > > --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c > > +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c > > @@ -2192,6 +2192,41 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc, > > return 0; > > } > > +static void guc_context_replay(struct intel_context *ce) > > +{ > > + struct i915_sched_engine *sched_engine = ce->engine->sched_engine; > > + > > + __guc_reset_context(ce, true); > > + tasklet_hi_schedule(&sched_engine->tasklet); > > +} > > + > > +static void guc_handle_context_reset(struct intel_guc *guc, > > + struct intel_context *ce) > > +{ > > + trace_intel_context_reset(ce); > > + guc_context_replay(ce); > > +} > > + > > +int intel_guc_context_reset_process_msg(struct intel_guc *guc, > > + const u32 *msg, u32 len) > > +{ > > + struct intel_context *ce; > > + int desc_idx = msg[0]; > Should do this dereference after checking the length? Or is it guaranteed > that the length cannot be zero? > I think for safety, it should be moved. Matt > John. > > > + > > + if (unlikely(len != 1)) { > > + drm_dbg(&guc_to_gt(guc)->i915->drm, "Invalid length %u", len); > > + return -EPROTO; > > + } > > + > > + ce = g2h_context_lookup(guc, desc_idx); > > + if (unlikely(!ce)) > > + return -EPROTO; > > + > > + guc_handle_context_reset(guc, ce); > > + > > + return 0; > > +} > > + > > void intel_guc_log_submission_info(struct intel_guc *guc, > > struct drm_printer *p) > > { > > diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h > > index 97c2e83984ed..c095c4d39456 100644 > > --- a/drivers/gpu/drm/i915/i915_trace.h > > +++ b/drivers/gpu/drm/i915/i915_trace.h > > @@ -929,6 +929,11 @@ DECLARE_EVENT_CLASS(intel_context, > > __entry->guc_sched_state_no_lock) > > ); > > +DEFINE_EVENT(intel_context, intel_context_reset, > > + TP_PROTO(struct intel_context *ce), > > + TP_ARGS(ce) > > +); > > + > > DEFINE_EVENT(intel_context, intel_context_register, > > TP_PROTO(struct intel_context *ce), > > TP_ARGS(ce) > > @@ -1026,6 +1031,11 @@ trace_i915_request_out(struct i915_request *rq) > > { > > } > > +static inline void > > +trace_intel_context_reset(struct intel_context *ce) > > +{ > > +} > > + > > static inline void > > trace_intel_context_register(struct intel_context *ce) > > { >
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h index 85ef6767f13b..e94b0ef733da 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h @@ -262,6 +262,8 @@ int intel_guc_deregister_done_process_msg(struct intel_guc *guc, const u32 *msg, u32 len); int intel_guc_sched_done_process_msg(struct intel_guc *guc, const u32 *msg, u32 len); +int intel_guc_context_reset_process_msg(struct intel_guc *guc, + const u32 *msg, u32 len); void intel_guc_submission_reset_prepare(struct intel_guc *guc); void intel_guc_submission_reset(struct intel_guc *guc, bool stalled); diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c index 4ed074df88e5..a2020373b8e8 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c @@ -945,6 +945,9 @@ static int ct_process_request(struct intel_guc_ct *ct, struct ct_incoming_msg *r case INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_DONE: ret = intel_guc_sched_done_process_msg(guc, payload, len); break; + case INTEL_GUC_ACTION_CONTEXT_RESET_NOTIFICATION: + ret = intel_guc_context_reset_process_msg(guc, payload, len); + break; default: ret = -EOPNOTSUPP; break; diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index 16b61fe71b07..9845c5bd9832 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -2192,6 +2192,41 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc, return 0; } +static void guc_context_replay(struct intel_context *ce) +{ + struct i915_sched_engine *sched_engine = ce->engine->sched_engine; + + __guc_reset_context(ce, true); + tasklet_hi_schedule(&sched_engine->tasklet); +} + +static void guc_handle_context_reset(struct intel_guc *guc, + struct intel_context *ce) +{ + trace_intel_context_reset(ce); + guc_context_replay(ce); +} + +int intel_guc_context_reset_process_msg(struct intel_guc *guc, + const u32 *msg, u32 len) +{ + struct intel_context *ce; + int desc_idx = msg[0]; + + if (unlikely(len != 1)) { + drm_dbg(&guc_to_gt(guc)->i915->drm, "Invalid length %u", len); + return -EPROTO; + } + + ce = g2h_context_lookup(guc, desc_idx); + if (unlikely(!ce)) + return -EPROTO; + + guc_handle_context_reset(guc, ce); + + return 0; +} + void intel_guc_log_submission_info(struct intel_guc *guc, struct drm_printer *p) { diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h index 97c2e83984ed..c095c4d39456 100644 --- a/drivers/gpu/drm/i915/i915_trace.h +++ b/drivers/gpu/drm/i915/i915_trace.h @@ -929,6 +929,11 @@ DECLARE_EVENT_CLASS(intel_context, __entry->guc_sched_state_no_lock) ); +DEFINE_EVENT(intel_context, intel_context_reset, + TP_PROTO(struct intel_context *ce), + TP_ARGS(ce) +); + DEFINE_EVENT(intel_context, intel_context_register, TP_PROTO(struct intel_context *ce), TP_ARGS(ce) @@ -1026,6 +1031,11 @@ trace_i915_request_out(struct i915_request *rq) { } +static inline void +trace_intel_context_reset(struct intel_context *ce) +{ +} + static inline void trace_intel_context_register(struct intel_context *ce) {
GuC will issue a reset on detecting an engine hang and will notify the driver via a G2H message. The driver will service the notification by resetting the guilty context to a simple state or banning it completely. Cc: Matthew Brost <matthew.brost@intel.com> Cc: John Harrison <John.C.Harrison@Intel.com> Signed-off-by: Matthew Brost <matthew.brost@intel.com> --- drivers/gpu/drm/i915/gt/uc/intel_guc.h | 2 ++ drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 3 ++ .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 35 +++++++++++++++++++ drivers/gpu/drm/i915/i915_trace.h | 10 ++++++ 4 files changed, 50 insertions(+)