linux-kernel - [PATCH v2 16/20] drm/amdgpu: give ttm entities access to all the sdma scheds

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Message-ID: <20251113160632.5889-17-pierre-eric.pelloux-prayer@amd.com>
Date: Thu, 13 Nov 2025 17:05:57 +0100
From: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
To: Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>, David Airlie
	<airlied@...il.com>, Simona Vetter <simona@...ll.ch>
CC: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
	<amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v2 16/20] drm/amdgpu: give ttm entities access to all the sdma scheds

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 11fec0fa4c11..94d0ff34593f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -2191,8 +2191,8 @@ u32 amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
 	u32 num_clear_entities, num_move_entities;
 	u32 windows, w;
 
-	num_clear_entities = adev->sdma.num_instances;
-	num_move_entities = MIN(adev->sdma.num_instances, TTM_NUM_MOVE_FENCES);
+	num_clear_entities = MIN(adev->mman.num_buffer_funcs_scheds, TTM_NUM_MOVE_FENCES);
+	num_move_entities = MIN(adev->mman.num_buffer_funcs_scheds, TTM_NUM_MOVE_FENCES);
 	windows = adev->gmc.is_app_apu ? 0 : (2 * num_move_entities + num_clear_entities);
 
 	if (!adev->mman.initialized || amdgpu_in_reset(adev) ||
@@ -2200,11 +2200,8 @@ u32 amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
 		return windows;
 
 	if (enable) {
-		struct drm_gpu_scheduler *sched;
-
-		sched = adev->mman.buffer_funcs_scheds[0];
 		r = drm_sched_entity_init(&adev->mman.default_entity.base,
-					  DRM_SCHED_PRIORITY_KERNEL, &sched,
+					  DRM_SCHED_PRIORITY_KERNEL, adev->mman.buffer_funcs_scheds,
 					  1, NULL);
 		if (r) {
 			dev_err(adev->dev, "Failed setting up entity (%d)\n",
@@ -2216,8 +2213,9 @@ u32 amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
 		atomic_set(&adev->mman.next_move_entity, 0);
 		for (i = 0; i < num_move_entities; i++) {
 			r = drm_sched_entity_init(&adev->mman.move_entities[i].base,
-						  DRM_SCHED_PRIORITY_NORMAL, &sched,
-						  1, NULL);
+						  DRM_SCHED_PRIORITY_NORMAL,
+						  adev->mman.buffer_funcs_scheds,
+						  adev->mman.num_buffer_funcs_scheds, NULL);
 			if (r) {
 				dev_err(adev->dev,
 					"Failed setting up TTM BO move entities (%d)\n",
@@ -2239,8 +2237,9 @@ u32 amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
 
 		for (i = 0; i < num_clear_entities; i++) {
 			r = drm_sched_entity_init(&adev->mman.clear_entities[i].base,
-						  DRM_SCHED_PRIORITY_NORMAL, &sched,
-						  1, NULL);
+						  DRM_SCHED_PRIORITY_NORMAL,
+						  adev->mman.buffer_funcs_scheds,
+						  adev->mman.num_buffer_funcs_scheds, NULL);
 			if (r) {
 				for (j = 0; j < num_move_entities; j++)
 					drm_sched_entity_destroy(
-- 
2.43.0