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drm/i915/guc: Handle context reset notification

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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.

v2:
 (John Harrison)
  - Move msg[0] lookup after length check
v3:
 (John Harrison)
  - s/drm_dbg/drm_err

Cc: Matthew Brost <matthew.brost@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727002348.97202-13-matthew.brost@intel.com
This commit is contained in:
Matthew Brost 2021-07-26 17:23:27 -07:00 committed by John Harrison
parent cad46a332f
commit 1e0fd2b5da
4 changed files with 51 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/gt/uc/intel_guc.h
View File

@ -269,6 +269,8 @@ 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);

3
drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
View File

@ -984,6 +984,9 @@ 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;

36
drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
View File

@ -2201,6 +2201,42 @@ 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;
if (unlikely(len != 1)) {
drm_err(&guc_to_gt(guc)->i915->drm, "Invalid length %u", len);
return -EPROTO;
}
desc_idx = msg[0];
ce = g2h_context_lookup(guc, desc_idx);
if (unlikely(!ce))
return -EPROTO;
guc_handle_context_reset(guc, ce);
return 0;
}
void intel_guc_submission_print_info(struct intel_guc *guc,
struct drm_printer *p)
{

10
drivers/gpu/drm/i915/i915_trace.h
View File

@ -920,6 +920,11 @@ 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)
@ -1007,6 +1012,11 @@ 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)
{