On Tue, Sep 26, 2023 at 04:18:42PM +0200, Nirmoy Das wrote:
> On MTL GEN12_RING_FAULT_REG is not replicated so don't
> do mcr based operation for this register.
>
> Signed-off-by: Nirmoy Das <nirmoy....@intel.com>
> ---
> drivers/gpu/drm/i915/gt/intel_gt.c | 14 +++++++++++++-
> drivers/gpu/drm/i915/gt/intel_gt_regs.h | 1 +
> drivers/gpu/drm/i915/i915_gpu_error.c | 11 ++++++++++-
> 3 files changed, 24 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c
> b/drivers/gpu/drm/i915/gt/intel_gt.c
> index 93062c35e072..d4de692e8be1 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt.c
> @@ -262,10 +262,22 @@ intel_gt_clear_error_registers(struct intel_gt *gt,
> I915_MASTER_ERROR_INTERRUPT);
> }
>
> - if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) {
> + /*
> + * for media tile this ring fault register is not replicated
> + * so skip doing mcr ops on it.
> + */
> + if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50) &&
This should be checking the media version rather than the graphics
version. I.e., "MEDIA_VER(i915) > 13" since it's possible future
versions of the media IP may change the behavior (independently of the
graphics IP versions).
Matt
> + gt->type == GT_MEDIA) {
> + intel_uncore_rmw(uncore, XELPMP_RING_FAULT_REG,
> + RING_FAULT_VALID, 0);
> + intel_uncore_posting_read(uncore,
> + XELPMP_RING_FAULT_REG);
> +
> + } else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) {
> intel_gt_mcr_multicast_rmw(gt, XEHP_RING_FAULT_REG,
> RING_FAULT_VALID, 0);
> intel_gt_mcr_read_any(gt, XEHP_RING_FAULT_REG);
> +
> } else if (GRAPHICS_VER(i915) >= 12) {
> intel_uncore_rmw(uncore, GEN12_RING_FAULT_REG,
> RING_FAULT_VALID, 0);
> intel_uncore_posting_read(uncore, GEN12_RING_FAULT_REG);
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> index cca4bac8f8b0..eecd0a87a647 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> @@ -1084,6 +1084,7 @@
>
> #define GEN12_RING_FAULT_REG _MMIO(0xcec4)
> #define XEHP_RING_FAULT_REG MCR_REG(0xcec4)
> +#define XELPMP_RING_FAULT_REG _MMIO(0xcec4)
> #define GEN8_RING_FAULT_ENGINE_ID(x) (((x) >> 12) & 0x7)
> #define RING_FAULT_GTTSEL_MASK (1 << 11)
> #define RING_FAULT_SRCID(x) (((x) >> 3) & 0xff)
> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c
> b/drivers/gpu/drm/i915/i915_gpu_error.c
> index f4ebcfb70289..83f1a729da8b 100644
> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
> @@ -1234,7 +1234,16 @@ static void engine_record_registers(struct
> intel_engine_coredump *ee)
> if (GRAPHICS_VER(i915) >= 6) {
> ee->rc_psmi = ENGINE_READ(engine, RING_PSMI_CTL);
>
> - if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
> + /*
> + * for media tile this ring fault register is not replicated
> + * so skip doing mcr ops on it.
> + */
> + if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50) &&
> + engine->gt->type == GT_MEDIA)
> + ee->fault_reg = intel_uncore_read(engine->uncore,
> +
> XELPMP_RING_FAULT_REG);
> +
> + else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
> ee->fault_reg = intel_gt_mcr_read_any(engine->gt,
>
> XEHP_RING_FAULT_REG);
> else if (GRAPHICS_VER(i915) >= 12)
> --
> 2.41.0
>
--
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation
