[PATCH v3 6/7] drm/xe/vf: Rebase MEMIRQ structures for all contexts after migration
K V P, Satyanarayana
satyanarayana.k.v.p at intel.com
Tue May 27 14:06:42 UTC 2025
Hi
> -----Original Message-----
> From: Intel-xe <intel-xe-bounces at lists.freedesktop.org> On Behalf Of Tomasz
> Lis
> Sent: Tuesday, May 20, 2025 4:49 AM
> To: intel-xe at lists.freedesktop.org
> Cc: Winiarski, Michal <michal.winiarski at intel.com>; Wajdeczko, Michal
> <Michal.Wajdeczko at intel.com>; Piorkowski, Piotr
> <piotr.piorkowski at intel.com>; Brost, Matthew <matthew.brost at intel.com>;
> De Marchi, Lucas <lucas.demarchi at intel.com>
> Subject: [PATCH v3 6/7] drm/xe/vf: Rebase MEMIRQ structures for all
> contexts after migration
>
> All contexts require an update of state data, as the data includes
> GGTT references to memirq-related buffers.
>
> Default contexts need these references updated as well, because they
> are not refreshed when a new context is created from them.
>
> v2: Update addresses by xe_lrc_write_ctx_reg() rather than
> set_memory_based_intr()
> v3: Renamed parameter, reordered parameters in some functs
>
> Signed-off-by: Tomasz Lis <tomasz.lis at intel.com>
> Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
> ---
> drivers/gpu/drm/xe/xe_exec_queue.c | 4 +++-
> drivers/gpu/drm/xe/xe_lrc.c | 35 ++++++++++++++++++++++++++++++
> drivers/gpu/drm/xe/xe_lrc.h | 2 ++
> drivers/gpu/drm/xe/xe_sriov_vf.c | 13 ++++++++++-
> 4 files changed, 52 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c
> b/drivers/gpu/drm/xe/xe_exec_queue.c
> index d696c8410a32..9c3e568400e0 100644
> --- a/drivers/gpu/drm/xe/xe_exec_queue.c
> +++ b/drivers/gpu/drm/xe/xe_exec_queue.c
> @@ -1051,6 +1051,8 @@ void xe_exec_queue_contexts_hwsp_rebase(struct
> xe_exec_queue *q)
> {
> int i;
>
> - for (i = 0; i < q->width; ++i)
> + for (i = 0; i < q->width; ++i) {
> + xe_lrc_update_memirq_regs_with_address(q->lrc[i], q->hwe);
> xe_lrc_update_hwctx_regs_with_address(q->lrc[i]);
> + }
> }
> diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c
> index 525565480aef..959ac9c5d39a 100644
> --- a/drivers/gpu/drm/xe/xe_lrc.c
> +++ b/drivers/gpu/drm/xe/xe_lrc.c
> @@ -898,6 +898,41 @@ static void *empty_lrc_data(struct xe_hw_engine
> *hwe)
> return data;
> }
>
> +/**
> + * xe_default_lrc_update_memirq_regs_with_address - Re-compute GGTT
> references in default LRC
> + * of given engine.
> + * @hwe: the &xe_hw_engine struct instance
> + */
> +void xe_default_lrc_update_memirq_regs_with_address(struct
> xe_hw_engine *hwe)
> +{
> + struct xe_gt *gt = hwe->gt;
> + u32 *regs;
> +
> + if (!gt->default_lrc[hwe->class])
> + return;
> +
> + regs = gt->default_lrc[hwe->class] + LRC_PPHWSP_SIZE;
> + set_memory_based_intr(regs, hwe);
> +}
> +
> +/**
> + * xe_lrc_update_memirq_regs_with_address - Re-compute GGTT references
> in mem interrupt data
> + * for given LRC.
> + * @lrc: the &xe_lrc struct instance
> + * @hwe: the &xe_hw_engine struct instance
> + */
> +void xe_lrc_update_memirq_regs_with_address(struct xe_lrc *lrc, struct
> xe_hw_engine *hwe)
> +{
> + struct xe_memirq *memirq = >_to_tile(hwe->gt)->memirq;
> +
> + xe_lrc_write_ctx_reg(lrc, CTX_INT_MASK_ENABLE_PTR,
> + xe_memirq_enable_ptr(memirq));
> + xe_lrc_write_ctx_reg(lrc, CTX_INT_STATUS_REPORT_PTR,
> + xe_memirq_status_ptr(memirq, hwe));
> + xe_lrc_write_ctx_reg(lrc, CTX_INT_SRC_REPORT_PTR,
> + xe_memirq_source_ptr(memirq, hwe));
> +}
> +
> static void xe_lrc_set_ppgtt(struct xe_lrc *lrc, struct xe_vm *vm)
> {
> u64 desc = xe_vm_pdp4_descriptor(vm, gt_to_tile(lrc->gt));
> diff --git a/drivers/gpu/drm/xe/xe_lrc.h b/drivers/gpu/drm/xe/xe_lrc.h
> index e7a99cfd0abe..801a6b943f6e 100644
> --- a/drivers/gpu/drm/xe/xe_lrc.h
> +++ b/drivers/gpu/drm/xe/xe_lrc.h
> @@ -89,6 +89,8 @@ u32 xe_lrc_indirect_ring_ggtt_addr(struct xe_lrc *lrc);
> u32 xe_lrc_ggtt_addr(struct xe_lrc *lrc);
> u32 *xe_lrc_regs(struct xe_lrc *lrc);
> void xe_lrc_update_hwctx_regs_with_address(struct xe_lrc *lrc);
> +void xe_default_lrc_update_memirq_regs_with_address(struct
> xe_hw_engine *hwe);
> +void xe_lrc_update_memirq_regs_with_address(struct xe_lrc *lrc, struct
> xe_hw_engine *hwe);
>
> u32 xe_lrc_read_ctx_reg(struct xe_lrc *lrc, int reg_nr);
> void xe_lrc_write_ctx_reg(struct xe_lrc *lrc, int reg_nr, u32 val);
> diff --git a/drivers/gpu/drm/xe/xe_sriov_vf.c
> b/drivers/gpu/drm/xe/xe_sriov_vf.c
> index 0f0d1a97ae1d..0a9761b6ffb5 100644
> --- a/drivers/gpu/drm/xe/xe_sriov_vf.c
> +++ b/drivers/gpu/drm/xe/xe_sriov_vf.c
> @@ -225,13 +225,24 @@ static int vf_post_migration_requery_guc(struct
> xe_device *xe)
> return ret;
> }
>
> +static void xe_gt_default_lrcs_hwsp_rebase(struct xe_gt *gt)
> +{
> + struct xe_hw_engine *hwe;
> + enum xe_hw_engine_id id;
> +
> + for_each_hw_engine(hwe, gt, id)
> + xe_default_lrc_update_memirq_regs_with_address(hwe);
> +}
> +
> static void vf_post_migration_fixup_contexts(struct xe_device *xe)
> {
> struct xe_gt *gt;
> unsigned int id;
>
> - for_each_gt(gt, xe, id)
> + for_each_gt(gt, xe, id) {
> + xe_gt_default_lrcs_hwsp_rebase(gt);
> xe_guc_contexts_hwsp_rebase(>->uc.guc);
> + }
> }
>
> static void vf_post_migration_fixup_ctb(struct xe_device *xe)
LGTM.
Acked-by: Satyanarayana K V P <satyanarayana.k.v.p at intel.com>
> --
> 2.25.1
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