On 12/10/2021 17:43, John Harrison wrote:
On 12/10/2021 16:56, Matthew Brost wrote:
Print CT state (H2G + G2H head / tail pointers, credits) on CT deadlock.
Signed-off-by: Matthew Brost matthew.brost@intel.com
Reviewed-by: John Harrison John.C.Harrison@Intel.com
drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 9 +++++++++ 1 file changed, 9 insertions(+)
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 a0cc34be7b56..ee5525c6f79b 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c @@ -523,6 +523,15 @@ static inline bool ct_deadlocked(struct intel_guc_ct *ct) CT_ERROR(ct, "Communication stalled for %lld ms, desc status=%#x,%#x\n", ktime_ms_delta(ktime_get(), ct->stall_time), send->status, recv->status); + CT_ERROR(ct, "H2G Space: %u\n", + atomic_read(&ct->ctbs.send.space) * 4); + CT_ERROR(ct, "Head: %u\n", ct->ctbs.send.desc->head); + CT_ERROR(ct, "Tail: %u\n", ct->ctbs.send.desc->tail);
Actually, aren't these offsets in dwords? So, scaling the dword space to bytes but leaving this as dwords would produce a confusing numbers.
John.
+ CT_ERROR(ct, "G2H Space: %u\n", + atomic_read(&ct->ctbs.recv.space) * 4); + CT_ERROR(ct, "Head: %u\n", ct->ctbs.recv.desc->head); + CT_ERROR(ct, "Tail: %u\n", ct->ctbs.recv.desc->tail);
ct->ctbs.send.broken = true; }