Re: [PATCH v4 3/4] drm/amdgpu: change hw sched list on ctx priority override

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On 3/4/20 11:25 PM, Luben Tuikov wrote:
On 2020-03-03 7:50 a.m., Nirmoy Das wrote:
Switch to appropriate sched list for an entity on priority override.

Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxx>
---
  drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 32 +++++++++++++++++++++----
  1 file changed, 28 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 8c52152e3a6e..a0bf14ab9d33 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -522,6 +522,32 @@ struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
  	return fence;
  }

+static void amdgpu_ctx_set_entity_priority(struct amdgpu_ctx *ctx,
+				   struct amdgpu_ctx_entity *aentity,
+				   int hw_ip, enum drm_sched_priority priority)
+{
+	struct amdgpu_device *adev = ctx->adev;
+	enum gfx_pipe_priority hw_prio;
+	struct drm_gpu_scheduler **scheds = NULL;
+	unsigned num_scheds;
+
+	/* set sw priority */
+	drm_sched_entity_set_priority(&aentity->entity, priority);
+
+	/* set hw priority */
+	switch (hw_ip) {
+	case AMDGPU_HW_IP_COMPUTE:
+		hw_prio = amdgpu_ctx_sched_prio_to_compute_prio(priority);
+		scheds = adev->gfx.compute_prio_sched[hw_prio];
+		num_scheds = adev->gfx.num_compute_sched[hw_prio];
+		break;
+	default:
+		return;
+	}
+
+	drm_sched_entity_modify_sched(&aentity->entity, scheds, num_scheds);
+}
I'd rather this not be over-engineered (in expectations of more case labels,
and a simple if-else to do it. Over-engineering it "just in case" creates
difficult to maintain code. I believe there is a document about this somewhere
in Documentation/.

This switch is in expectation of extending it for VCN and GFX but I guess that can wait for now,.


thanks,

Nirmoy

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