Re: [PATCH v2 16/21] drm/i915: Define GuC Based TLB invalidation routines
From: Michal Wajdeczko
Date: Thu Jul 14 2022 - 11:20:26 EST
On 14.07.2022 14:06, Mauro Carvalho Chehab wrote:
> From: Prathap Kumar Valsan <prathap.kumar.valsan@xxxxxxxxx>
>
> Add routines to interface with GuC firmware for selective TLB invalidation
> supported on XeHP.
>
> Signed-off-by: Prathap Kumar Valsan <prathap.kumar.valsan@xxxxxxxxx>
> Cc: Matthew Brost <matthew.brost@xxxxxxxxx>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
> ---
>
> To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
> See [PATCH v2 00/21] at: https://lore.kernel.org/all/cover.1657800199.git.mchehab@xxxxxxxxxx/
>
> .../gpu/drm/i915/gt/uc/abi/guc_actions_abi.h | 3 +
> drivers/gpu/drm/i915/gt/uc/intel_guc.c | 90 +++++++++++++++++++
> drivers/gpu/drm/i915/gt/uc/intel_guc.h | 10 +++
> drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 3 +
> 4 files changed, 106 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
> index fb0af33e43cc..5c019856a269 100644
> --- a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
> +++ b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
> @@ -188,6 +188,9 @@ enum intel_guc_state_capture_event_status {
> #define INTEL_GUC_TLB_INVAL_FLUSH_CACHE (1 << 31)
>
> enum intel_guc_tlb_invalidation_type {
> + INTEL_GUC_TLB_INVAL_FULL = 0x0,
> + INTEL_GUC_TLB_INVAL_PAGE_SELECTIVE = 0x1,
> + INTEL_GUC_TLB_INVAL_PAGE_SELECTIVE_CTX = 0x2,
> INTEL_GUC_TLB_INVAL_GUC = 0x3,
> };
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> index 8a104a292598..98260a7bc90b 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> @@ -923,6 +923,96 @@ static int guc_send_invalidate_tlb(struct intel_guc *guc, u32 *action, u32 size)
> return err;
> }
>
> + /* Full TLB invalidation */
> +int intel_guc_invalidate_tlb_full(struct intel_guc *guc,
> + enum intel_guc_tlb_inval_mode mode)
> +{
> + u32 action[] = {
> + INTEL_GUC_ACTION_TLB_INVALIDATION,
> + 0,
> + INTEL_GUC_TLB_INVAL_FULL << INTEL_GUC_TLB_INVAL_TYPE_SHIFT |
> + mode << INTEL_GUC_TLB_INVAL_MODE_SHIFT |
> + INTEL_GUC_TLB_INVAL_FLUSH_CACHE,
> + };
> +
> + if (!INTEL_GUC_SUPPORTS_TLB_INVALIDATION(guc)) {
> + DRM_ERROR("Tlb invalidation: Operation not supported in this platform!\n");
s/Tlb/TLB
and use drm_err() or even consider GEM_BUG_ON() as this looks more like
a coding mistake if we will be here, no ?
> + return 0;
> + }
> +
> + return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action));
> +}
> +
> +/*
> + * Selective TLB Invalidation for Address Range:
> + * TLB's in the Address Range is Invalidated across all engines.
> + */
> +int intel_guc_invalidate_tlb_page_selective(struct intel_guc *guc,
> + enum intel_guc_tlb_inval_mode mode,
> + u64 start, u64 length)
> +{
> + u64 vm_total = BIT_ULL(INTEL_INFO(guc_to_gt(guc)->i915)->ppgtt_size);
> + u32 address_mask = (ilog2(length) - ilog2(I915_GTT_PAGE_SIZE_4K));
drop extra ( )
> + u32 full_range = vm_total == length;
bool ?
> + u32 action[] = {
> + INTEL_GUC_ACTION_TLB_INVALIDATION,
> + 0,
> + INTEL_GUC_TLB_INVAL_PAGE_SELECTIVE << INTEL_GUC_TLB_INVAL_TYPE_SHIFT |
> + mode << INTEL_GUC_TLB_INVAL_MODE_SHIFT |
> + INTEL_GUC_TLB_INVAL_FLUSH_CACHE,
> + 0,
> + full_range ? full_range : lower_32_bits(start),
> + full_range ? 0 : upper_32_bits(start),
> + full_range ? 0 : address_mask,
> + };
> +
> + if (!INTEL_GUC_SUPPORTS_TLB_INVALIDATION_SELECTIVE(guc)) {
> + DRM_ERROR("Tlb invalidation: Operation not supported in this platform!\n");
as above
> + return 0;
> + }
> +
> + GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE_4K));
> + GEM_BUG_ON(!IS_ALIGNED(length, I915_GTT_PAGE_SIZE_4K));
> + GEM_BUG_ON(range_overflows(start, length, vm_total));
> +
> + return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action));
> +}
> +
> +/*
> + * Selective TLB Invalidation for Context:
> + * Invalidates all TLB's for a specific context across all engines.
> + */
> +int intel_guc_invalidate_tlb_page_selective_ctx(struct intel_guc *guc,
> + enum intel_guc_tlb_inval_mode mode,
> + u64 start, u64 length, u32 ctxid)
> +{
> + u64 vm_total = BIT_ULL(INTEL_INFO(guc_to_gt(guc)->i915)->ppgtt_size);
> + u32 address_mask = (ilog2(length) - ilog2(I915_GTT_PAGE_SIZE_4K));
drop ( )
> + u32 full_range = vm_total == length;
bool
> + u32 action[] = {
> + INTEL_GUC_ACTION_TLB_INVALIDATION,
> + 0,
> + INTEL_GUC_TLB_INVAL_PAGE_SELECTIVE_CTX << INTEL_GUC_TLB_INVAL_TYPE_SHIFT |
> + mode << INTEL_GUC_TLB_INVAL_MODE_SHIFT |
> + INTEL_GUC_TLB_INVAL_FLUSH_CACHE,
> + ctxid,
> + full_range ? full_range : lower_32_bits(start),
> + full_range ? 0 : upper_32_bits(start),
> + full_range ? 0 : address_mask,
> + };
> +
> + if (!INTEL_GUC_SUPPORTS_TLB_INVALIDATION_SELECTIVE(guc)) {
> + DRM_ERROR("Tlb invalidation: Operation not supported in this platform!\n");
as above
> + return 0;
> + }
> +
> + GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE_4K));
> + GEM_BUG_ON(!IS_ALIGNED(length, I915_GTT_PAGE_SIZE_4K));
> + GEM_BUG_ON(range_overflows(start, length, vm_total));
> +
> + return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action));
> +}
> +
> /*
> * Guc TLB Invalidation: Invalidate the TLB's of GuC itself.
> */
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> index 01c6478451cc..df6ba1c32808 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> @@ -384,6 +384,16 @@ int intel_guc_allocate_and_map_vma(struct intel_guc *guc, u32 size,
> int intel_guc_self_cfg32(struct intel_guc *guc, u16 key, u32 value);
> int intel_guc_self_cfg64(struct intel_guc *guc, u16 key, u64 value);
>
> +int intel_guc_g2g_register(struct intel_guc *guc);
drop this, not part of this series
> +
> +int intel_guc_invalidate_tlb_full(struct intel_guc *guc,
> + enum intel_guc_tlb_inval_mode mode);
> +int intel_guc_invalidate_tlb_page_selective(struct intel_guc *guc,
> + enum intel_guc_tlb_inval_mode mode,
> + u64 start, u64 length);
> +int intel_guc_invalidate_tlb_page_selective_ctx(struct intel_guc *guc,
> + enum intel_guc_tlb_inval_mode mode,
> + u64 start, u64 length, u32 ctxid);
> int intel_guc_invalidate_tlb_guc(struct intel_guc *guc,
> enum intel_guc_tlb_inval_mode mode);
> int intel_guc_invalidate_tlb_all(struct intel_guc *guc);
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> index 3edf567b3f65..29e402f70a94 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> @@ -436,5 +436,8 @@ enum intel_guc_recv_message {
> ((intel_guc_ct_enabled(&(guc)->ct)) && \
> (intel_guc_submission_is_used(guc)) && \
> (GRAPHICS_VER(guc_to_gt((guc))->i915) >= 12))
> +#define INTEL_GUC_SUPPORTS_TLB_INVALIDATION_SELECTIVE(guc) \
> + (INTEL_GUC_SUPPORTS_TLB_INVALIDATION(guc) && \
> + HAS_SELECTIVE_TLB_INVALIDATION(guc_to_gt(guc)->i915))
>
> #endif
,Michal