On Fri, May 24, 2024 at 06:41:20PM -0700, john.c.harri...@intel.com wrote:
> From: John Harrison <john.c.harri...@intel.com>
>
> Enable another workaround that is implemented inside the GuC.
>
> Signed-off-by: John Harrison <john.c.harri...@intel.com>
> ---
> drivers/gpu/drm/i915/gt/uc/abi/guc_klvs_abi.h | 1 +
> drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 32 ++++++++++++-------
> 2 files changed, 21 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/abi/guc_klvs_abi.h
> b/drivers/gpu/drm/i915/gt/uc/abi/guc_klvs_abi.h
> index 525587cfe1af9..37ff539a6963d 100644
> --- a/drivers/gpu/drm/i915/gt/uc/abi/guc_klvs_abi.h
> +++ b/drivers/gpu/drm/i915/gt/uc/abi/guc_klvs_abi.h
> @@ -106,6 +106,7 @@ enum {
> */
> enum {
> GUC_WORKAROUND_KLV_SERIALIZED_RA_MODE =
> 0x9001,
> + GUC_WORKAROUND_KLV_BLOCK_INTERRUPTS_WHEN_MGSR_BLOCKED =
> 0x9002,
> };
>
> #endif /* _ABI_GUC_KLVS_ABI_H */
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> index c606bb5e3b7b0..6c382785bc60b 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> @@ -815,23 +815,23 @@ guc_capture_prep_lists(struct intel_guc *guc)
> return PAGE_ALIGN(total_size);
> }
>
> -/* Wa_14019159160 */
> -static u32 guc_waklv_ra_mode(struct intel_guc *guc, u32 offset, u32 remain)
> +static void guc_waklv_enable_simple(struct intel_guc *guc,
> + u32 klv_id, u32 *offset, u32 *remain)
> {
> u32 size;
> u32 klv_entry[] = {
> /* 16:16 key/length */
> - FIELD_PREP(GUC_KLV_0_KEY,
> GUC_WORKAROUND_KLV_SERIALIZED_RA_MODE) |
> + FIELD_PREP(GUC_KLV_0_KEY, klv_id) |
> FIELD_PREP(GUC_KLV_0_LEN, 0),
> /* 0 dwords data */
> };
>
> size = sizeof(klv_entry);
> - GEM_BUG_ON(remain < size);
> + GEM_BUG_ON(*remain < size);
>
> - iosys_map_memcpy_to(&guc->ads_map, offset, klv_entry, size);
> -
> - return size;
> + iosys_map_memcpy_to(&guc->ads_map, *offset, klv_entry, size);
> + *offset += size;
> + *remain -= size;
> }
>
> static void guc_waklv_init(struct intel_guc *guc)
> @@ -850,11 +850,19 @@ static void guc_waklv_init(struct intel_guc *guc)
> remain = guc_ads_waklv_size(guc);
>
> /* Wa_14019159160 */
> - if (IS_GFX_GT_IP_RANGE(gt, IP_VER(12, 70), IP_VER(12, 71))) {
> - size = guc_waklv_ra_mode(guc, offset, remain);
> - offset += size;
> - remain -= size;
> - }
> + if (IS_GFX_GT_IP_RANGE(gt, IP_VER(12, 70), IP_VER(12, 71)))
> + guc_waklv_enable_simple(guc,
> + GUC_WORKAROUND_KLV_SERIALIZED_RA_MODE,
> + &offset, &remain);
> +
> + /* Wa_14019882105 */
Is this the right number? When I look up Wa_14019882105 in the
workaround database, it only lists it as being relevant to A steppings
of G:20.04. I don't see entries for 12.70/12.71. Did it go by a
different lineage number on the older platforms?
Also, I notice the Wa_14019159160 we had just above this workaround is
missing handling for graphics version 12.74.
Matt
> + if ((GUC_FIRMWARE_VER(guc) >= MAKE_GUC_VER(70, 21, 1)) &&
> + (IS_GFX_GT_IP_RANGE(gt, IP_VER(12, 70), IP_VER(12, 71)) ||
> + IS_MEDIA_GT_IP_RANGE(gt, IP_VER(13, 0), IP_VER(13, 0)) ||
> + IS_DG2(gt->i915)))
> + guc_waklv_enable_simple(guc,
> +
> GUC_WORKAROUND_KLV_BLOCK_INTERRUPTS_WHEN_MGSR_BLOCKED,
> + &offset, &remain);
>
> size = guc_ads_waklv_size(guc) - remain;
> if (!size)
> --
> 2.43.2
>
--
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation
