* [PATCH] drm/amdkfd: Enable SDMA IB processing
@ 2026-10-19 17:58 Yongqiang Sun
2026-10-19 18:23 ` Alex Deucher
2026-10-19 18:27 ` Mukul Joshi
0 siblings, 2 replies; 3+ messages in thread
From: Yongqiang Sun @ 2026-10-19 17:58 UTC (permalink / raw)
To: amd-gfx; +Cc: Mukul.Joshi, Yongqiang Sun
SDMA MQDs leave IB_ENABLE clear,
causing INDIRECT packets to be ignored.
Set IB_ENABLE while retaining SWITCH_INSIDE_IB.
Signed-off-by: Yongqiang Sun <Yongqiang.Sun@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c | 7 +++++++
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c | 7 +++++++
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c | 11 ++++++-----
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c | 11 ++++++-----
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c | 8 +++++---
5 files changed, 31 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
index 4f8a8a1a6186..25f5a2cf02ff 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
@@ -396,6 +396,13 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
m->sdma_queue_id = q->sdma_queue_id;
m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
+ /* Enable IB execution; allow context switch inside an IB so one
+ * queue cannot starve the engine.
+ */
+ m->sdmax_rlcx_ib_cntl |=
+ SDMA0_RLC0_IB_CNTL__IB_ENABLE_MASK |
+ SDMA0_RLC0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
+
q->is_active = QUEUE_IS_ACTIVE(*q);
}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
index bf015dc5b868..a1eecdf63b0c 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
@@ -478,6 +478,13 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
m->sdma_queue_id = q->sdma_queue_id;
m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
+ /* Enable IB execution; allow context switch inside an IB so one
+ * queue cannot starve the engine.
+ */
+ m->sdmax_rlcx_ib_cntl |=
+ SDMA0_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
+ SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
+
q->is_active = QUEUE_IS_ACTIVE(*q);
}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
index 6ea09b031caf..e0574fa325c4 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
@@ -353,11 +353,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
- /* Allow context switch so we don't cross-process starve with a massive
- * command buffer of long-running SDMA commands
- * sdmax_rlcx_ib_cntl represent SDMA_QUEUE0_IB_CNTL register
- */
- m->sdmax_rlcx_ib_cntl |= SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
+ /* Enable IB execution; allow context switch inside an IB so one
+ * queue cannot starve the engine.
+ */
+ m->sdmax_rlcx_ib_cntl |=
+ SDMA0_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
+ SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
q->is_active = QUEUE_IS_ACTIVE(*q);
}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
index 2bbf5e63f615..04e1575dfe76 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
@@ -457,11 +457,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
m->sdmax_queuen_dummy_reg1 = 1;
- /* Allow context switch so we don't cross-process starve with a massive
- * command buffer of long-running SDMA commands
- * sdmax_queuen_ib_cntl represent SDMA_QUEUE0_IB_CNTL register
- */
- m->sdmax_queuen_ib_cntl |= SDMA0_SDMA_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
+ /* Enable IB execution; allow context switch inside an IB so one
+ * queue cannot starve the engine.
+ */
+ m->sdmax_queuen_ib_cntl |=
+ SDMA0_SDMA_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
+ SDMA0_SDMA_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
q->is_active = QUEUE_IS_ACTIVE(*q);
}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
index 6e6bc1ec0b64..80df86f7c4d5 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
@@ -569,10 +569,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
m->sdma_engine_id = q->sdma_engine_id;
m->sdma_queue_id = q->sdma_queue_id;
m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
- /* Allow context switch so we don't cross-process starve with a massive
- * command buffer of long-running SDMA commands
+ /* Enable IB execution; allow context switch inside an IB so one
+ * queue cannot starve the engine.
*/
- m->sdmax_rlcx_ib_cntl |= SDMA0_GFX_IB_CNTL__SWITCH_INSIDE_IB_MASK;
+ m->sdmax_rlcx_ib_cntl |=
+ SDMA0_GFX_IB_CNTL__IB_ENABLE_MASK |
+ SDMA0_GFX_IB_CNTL__SWITCH_INSIDE_IB_MASK;
q->is_active = QUEUE_IS_ACTIVE(*q);
}
--
2.43.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/amdkfd: Enable SDMA IB processing
2026-10-19 17:58 [PATCH] drm/amdkfd: Enable SDMA IB processing Yongqiang Sun
@ 2026-10-19 18:23 ` Alex Deucher
2026-10-19 18:27 ` Mukul Joshi
1 sibling, 0 replies; 3+ messages in thread
From: Alex Deucher @ 2026-10-19 18:23 UTC (permalink / raw)
To: Yongqiang Sun; +Cc: amd-gfx, Mukul.Joshi
On Mon, Oct 19, 2026 at 2:06 PM Yongqiang Sun <Yongqiang.Sun@amd.com> wrote:
>
> SDMA MQDs leave IB_ENABLE clear,
> causing INDIRECT packets to be ignored.
>
> Set IB_ENABLE while retaining SWITCH_INSIDE_IB.
>
> Signed-off-by: Yongqiang Sun <Yongqiang.Sun@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c | 7 +++++++
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c | 7 +++++++
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c | 11 ++++++-----
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c | 11 ++++++-----
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c | 8 +++++---
> 5 files changed, 31 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
> index 4f8a8a1a6186..25f5a2cf02ff 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
> @@ -396,6 +396,13 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
> m->sdma_queue_id = q->sdma_queue_id;
> m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
>
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> + */
> + m->sdmax_rlcx_ib_cntl |=
> + SDMA0_RLC0_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_RLC0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> +
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
> index bf015dc5b868..a1eecdf63b0c 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
> @@ -478,6 +478,13 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
> m->sdma_queue_id = q->sdma_queue_id;
> m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
>
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> + */
> + m->sdmax_rlcx_ib_cntl |=
> + SDMA0_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> +
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
> index 6ea09b031caf..e0574fa325c4 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
> @@ -353,11 +353,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
>
> m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
>
> - /* Allow context switch so we don't cross-process starve with a massive
> - * command buffer of long-running SDMA commands
> - * sdmax_rlcx_ib_cntl represent SDMA_QUEUE0_IB_CNTL register
> - */
> - m->sdmax_rlcx_ib_cntl |= SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> + */
> + m->sdmax_rlcx_ib_cntl |=
> + SDMA0_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
>
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
> index 2bbf5e63f615..04e1575dfe76 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
> @@ -457,11 +457,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
>
> m->sdmax_queuen_dummy_reg1 = 1;
>
> - /* Allow context switch so we don't cross-process starve with a massive
> - * command buffer of long-running SDMA commands
> - * sdmax_queuen_ib_cntl represent SDMA_QUEUE0_IB_CNTL register
> - */
> - m->sdmax_queuen_ib_cntl |= SDMA0_SDMA_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> + */
> + m->sdmax_queuen_ib_cntl |=
> + SDMA0_SDMA_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_SDMA_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
>
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
> index 6e6bc1ec0b64..80df86f7c4d5 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
> @@ -569,10 +569,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
> m->sdma_engine_id = q->sdma_engine_id;
> m->sdma_queue_id = q->sdma_queue_id;
> m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
> - /* Allow context switch so we don't cross-process starve with a massive
> - * command buffer of long-running SDMA commands
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> */
> - m->sdmax_rlcx_ib_cntl |= SDMA0_GFX_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> + m->sdmax_rlcx_ib_cntl |=
> + SDMA0_GFX_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_GFX_IB_CNTL__SWITCH_INSIDE_IB_MASK;
>
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
> --
> 2.43.0
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/amdkfd: Enable SDMA IB processing
2026-10-19 17:58 [PATCH] drm/amdkfd: Enable SDMA IB processing Yongqiang Sun
2026-10-19 18:23 ` Alex Deucher
@ 2026-10-19 18:27 ` Mukul Joshi
1 sibling, 0 replies; 3+ messages in thread
From: Mukul Joshi @ 2026-10-19 18:27 UTC (permalink / raw)
To: Yongqiang Sun, amd-gfx
On 10/19/2026 1:58 PM, Yongqiang Sun wrote:
> SDMA MQDs leave IB_ENABLE clear,
> causing INDIRECT packets to be ignored.
>
> Set IB_ENABLE while retaining SWITCH_INSIDE_IB.
This is not entirely true. We are enabling SWITCH_INSIDE_IB for GFX 10
and GFX 11 in the patch.
Maybe you can update the commit heading + description as:
"drm/amdkfd: Enable IB execution for user-mode SDMA queues
update_mqd_sdma() never sets IB_ENABLE in the SDMA queue IB_CNTL,
so INDIRECT packets submitted on user-mode SDMA queues are not executed.
Set IB_ENABLE on all MQD versions. On gfx10 and gfx11, also set
SWITCH_INSIDE_IB, which was previously only set on gfx9 and gfx12,
so that a long-running IB can be preempted."
With that fixed, this patch is:
Reviewed-by: Mukul Joshi <mukul.joshi@amd.com>
>
> Signed-off-by: Yongqiang Sun <Yongqiang.Sun@amd.com>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c | 7 +++++++
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c | 7 +++++++
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c | 11 ++++++-----
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c | 11 ++++++-----
> drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c | 8 +++++---
> 5 files changed, 31 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
> index 4f8a8a1a6186..25f5a2cf02ff 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
> @@ -396,6 +396,13 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
> m->sdma_queue_id = q->sdma_queue_id;
> m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
>
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> + */
> + m->sdmax_rlcx_ib_cntl |=
> + SDMA0_RLC0_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_RLC0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> +
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
> index bf015dc5b868..a1eecdf63b0c 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
> @@ -478,6 +478,13 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
> m->sdma_queue_id = q->sdma_queue_id;
> m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
>
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> + */
> + m->sdmax_rlcx_ib_cntl |=
> + SDMA0_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> +
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
> index 6ea09b031caf..e0574fa325c4 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c
> @@ -353,11 +353,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
>
> m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
>
> - /* Allow context switch so we don't cross-process starve with a massive
> - * command buffer of long-running SDMA commands
> - * sdmax_rlcx_ib_cntl represent SDMA_QUEUE0_IB_CNTL register
> - */
> - m->sdmax_rlcx_ib_cntl |= SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> + */
> + m->sdmax_rlcx_ib_cntl |=
> + SDMA0_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
>
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
> index 2bbf5e63f615..04e1575dfe76 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c
> @@ -457,11 +457,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
>
> m->sdmax_queuen_dummy_reg1 = 1;
>
> - /* Allow context switch so we don't cross-process starve with a massive
> - * command buffer of long-running SDMA commands
> - * sdmax_queuen_ib_cntl represent SDMA_QUEUE0_IB_CNTL register
> - */
> - m->sdmax_queuen_ib_cntl |= SDMA0_SDMA_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> + */
> + m->sdmax_queuen_ib_cntl |=
> + SDMA0_SDMA_QUEUE0_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_SDMA_QUEUE0_IB_CNTL__SWITCH_INSIDE_IB_MASK;
>
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
> index 6e6bc1ec0b64..80df86f7c4d5 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
> @@ -569,10 +569,12 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
> m->sdma_engine_id = q->sdma_engine_id;
> m->sdma_queue_id = q->sdma_queue_id;
> m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT;
> - /* Allow context switch so we don't cross-process starve with a massive
> - * command buffer of long-running SDMA commands
> + /* Enable IB execution; allow context switch inside an IB so one
> + * queue cannot starve the engine.
> */
> - m->sdmax_rlcx_ib_cntl |= SDMA0_GFX_IB_CNTL__SWITCH_INSIDE_IB_MASK;
> + m->sdmax_rlcx_ib_cntl |=
> + SDMA0_GFX_IB_CNTL__IB_ENABLE_MASK |
> + SDMA0_GFX_IB_CNTL__SWITCH_INSIDE_IB_MASK;
>
> q->is_active = QUEUE_IS_ACTIVE(*q);
> }
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-10-19 18:28 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-10-19 17:58 [PATCH] drm/amdkfd: Enable SDMA IB processing Yongqiang Sun
2026-10-19 18:23 ` Alex Deucher
2026-10-19 18:27 ` Mukul Joshi
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.