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dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 > Reviewed-by: John Harrison > >> --- >>   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; >>       } >