RE: [PATCH v2 1/4] drm/amdgpu: track faulted gfx user-queue slots

AMD General

Ping..

> -----Original Message-----
> From: Jesse Zhang <[email protected]>
> Sent: Wednesday, July 22, 2026 11:21 AM
> To: [email protected]
> Cc: Deucher, Alexander <[email protected]>; Koenig, Christian
> <[email protected]>; Zhang, Jesse(Jie) <[email protected]>
> Subject: [PATCH v2 1/4] drm/amdgpu: track faulted gfx user-queue slots
>
> A gfx priv/bad-op fault IV carries only the HW slot (ring_id), not the faulting user
> queue's doorbell. Add userq_priv_fault_slots (an atomic bitmap of faulted slots, so
> concurrent faults are not dropped) and userq_priv_fault_work to struct amdgpu_gfx;
> a worker drains the bitmap and reads the doorbell back from each HQD to locate
> and reset the queue.
>
> Signed-off-by: Jesse Zhang <[email protected]>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
> index aefd4f03b443..f83afa7e0aa5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
> @@ -535,6 +535,9 @@ struct amdgpu_gfx {
>       struct mutex                    userq_sch_mutex;
>       u64                             userq_sch_req_count[MAX_XCP];
>       bool                            userq_sch_inactive[MAX_XCP];
> +     /* atomic bitmap of faulted gfx UQ slots (index = pipe | queue << 2) */
> +     unsigned long                   userq_priv_fault_slots;
> +     struct work_struct              userq_priv_fault_work;
>       unsigned long                   enforce_isolation_jiffies[MAX_XCP];
>       unsigned long                   enforce_isolation_time[MAX_XCP];
>
> --
> 2.49.0