On 2025-11-13 11:05, Pierre-Eric Pelloux-Prayer wrote:
This will allow the use of all of them for clear/fill buffer
operations.
Since drm_sched_entity_init requires a scheduler array, we
store schedulers rather than rings. For the few places that need
access to a ring, we can get it from the sched using container_of.

Since the code is the same for all sdma versions, add a new
helper amdgpu_sdma_set_buffer_funcs_scheds to set buffer_funcs_scheds
based on the number of sdma instances.

Note: the new sched array is identical to the amdgpu_vm_manager one.
These 2 could be merged.

Signed-off-by: Pierre-Eric Pelloux-Prayer <[email protected]>

Acked-by: Felix Kuehling <[email protected]>


---
  drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  2 +
  drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c |  4 +-
  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    |  8 ++--
  drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c       |  4 +-
  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c       | 41 +++++++++++++++----
  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h       |  3 +-
  drivers/gpu/drm/amd/amdgpu/cik_sdma.c         |  3 +-
  drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c        |  3 +-
  drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c        |  3 +-
  drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c        |  6 +--
  drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c      |  6 +--
  drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c        |  6 +--
  drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c        |  6 +--
  drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c        |  3 +-
  drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c        |  3 +-
  drivers/gpu/drm/amd/amdgpu/si_dma.c           |  3 +-
  drivers/gpu/drm/amd/amdkfd/kfd_migrate.c      |  3 +-
  17 files changed, 62 insertions(+), 45 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 3fab3dc9f3e4..05c13fb0e6bf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1615,6 +1615,8 @@ ssize_t amdgpu_get_soft_full_reset_mask(struct 
amdgpu_ring *ring);
  ssize_t amdgpu_show_reset_mask(char *buf, uint32_t supported_reset);
  void amdgpu_sdma_set_vm_pte_scheds(struct amdgpu_device *adev,
                                   const struct amdgpu_vm_pte_funcs 
*vm_pte_funcs);
+void amdgpu_sdma_set_buffer_funcs_scheds(struct amdgpu_device *adev,
+                                        const struct amdgpu_buffer_funcs 
*buffer_funcs);
/* atpx handler */
  #if defined(CONFIG_VGA_SWITCHEROO)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
index b59040a8771f..9ea927e07a77 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
@@ -32,12 +32,14 @@ static int amdgpu_benchmark_do_move(struct amdgpu_device 
*adev, unsigned size,
                                    uint64_t saddr, uint64_t daddr, int n, s64 
*time_ms)
  {
        ktime_t stime, etime;
+       struct amdgpu_ring *ring;
        struct dma_fence *fence;
        int i, r;
+ ring = container_of(adev->mman.buffer_funcs_scheds[0], struct amdgpu_ring, sched);
+
        stime = ktime_get();
        for (i = 0; i < n; i++) {
-               struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
                r = amdgpu_copy_buffer(ring, &adev->mman.default_entity.base,
                                       saddr, daddr, size, NULL, &fence,
                                       false, 0);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index b92234d63562..1927d940fbca 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3303,7 +3303,7 @@ static int amdgpu_device_ip_init(struct amdgpu_device 
*adev)
        if (r)
                goto init_failed;
- if (adev->mman.buffer_funcs_ring->sched.ready)
+       if (adev->mman.buffer_funcs_scheds[0]->ready)
                amdgpu_ttm_set_buffer_funcs_status(adev, true);
/* Don't init kfd if whole hive need to be reset during init */
@@ -4143,7 +4143,7 @@ static int amdgpu_device_ip_resume(struct amdgpu_device 
*adev)
r = amdgpu_device_ip_resume_phase2(adev); - if (adev->mman.buffer_funcs_ring->sched.ready)
+       if (adev->mman.buffer_funcs_scheds[0]->ready)
                amdgpu_ttm_set_buffer_funcs_status(adev, true);
if (r)
@@ -4493,7 +4493,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
        adev->num_rings = 0;
        RCU_INIT_POINTER(adev->gang_submit, dma_fence_get_stub());
        adev->mman.buffer_funcs = NULL;
-       adev->mman.buffer_funcs_ring = NULL;
+       adev->mman.num_buffer_funcs_scheds = 0;
        adev->vm_manager.vm_pte_funcs = NULL;
        adev->vm_manager.vm_pte_num_scheds = 0;
        adev->gmc.gmc_funcs = NULL;
@@ -5965,7 +5965,7 @@ int amdgpu_device_reinit_after_reset(struct 
amdgpu_reset_context *reset_context)
                                if (r)
                                        goto out;
- if (tmp_adev->mman.buffer_funcs_ring->sched.ready)
+                               if 
(tmp_adev->mman.buffer_funcs_scheds[0]->ready)
                                        
amdgpu_ttm_set_buffer_funcs_status(tmp_adev, true);
r = amdgpu_device_ip_resume_phase3(tmp_adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index 2713dd51ab9a..4433d8620129 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -651,12 +651,14 @@ int amdgpu_gmc_allocate_vm_inv_eng(struct amdgpu_device 
*adev)
  void amdgpu_gmc_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
                              uint32_t vmhub, uint32_t flush_type)
  {
-       struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
+       struct amdgpu_ring *ring;
        struct amdgpu_vmhub *hub = &adev->vmhub[vmhub];
        struct dma_fence *fence;
        struct amdgpu_job *job;
        int r, i;
+ ring = container_of(adev->mman.buffer_funcs_scheds[0], struct amdgpu_ring, sched);
+
        if (!hub->sdma_invalidation_workaround || vmid ||
            !adev->mman.buffer_funcs_enabled || !adev->ib_pool_ready ||
            !ring->sched.ready) {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 6c333dba7a35..11fec0fa4c11 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -308,7 +308,7 @@ static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device 
*adev,
                                      struct dma_resv *resv,
                                      struct dma_fence **f)
  {
-       struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
+       struct amdgpu_ring *ring;
        struct amdgpu_res_cursor src_mm, dst_mm;
        struct dma_fence *fence = NULL;
        int r = 0;
@@ -321,6 +321,8 @@ static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device 
*adev,
                return -EINVAL;
        }
+ ring = container_of(adev->mman.buffer_funcs_scheds[0], struct amdgpu_ring, sched);
+
        amdgpu_res_first(src->mem, src->offset, size, &src_mm);
        amdgpu_res_first(dst->mem, dst->offset, size, &dst_mm);
@@ -1493,6 +1495,7 @@ static int amdgpu_ttm_access_memory_sdma(struct ttm_buffer_object *bo,
        struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
        struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
        struct amdgpu_res_cursor src_mm;
+       struct amdgpu_ring *ring;
        struct amdgpu_job *job;
        struct dma_fence *fence;
        uint64_t src_addr, dst_addr;
@@ -1530,7 +1533,8 @@ static int amdgpu_ttm_access_memory_sdma(struct 
ttm_buffer_object *bo,
        amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, dst_addr,
                                PAGE_SIZE, 0);
- amdgpu_ring_pad_ib(adev->mman.buffer_funcs_ring, &job->ibs[0]);
+       ring = container_of(adev->mman.buffer_funcs_scheds[0], struct 
amdgpu_ring, sched);
+       amdgpu_ring_pad_ib(ring, &job->ibs[0]);
        WARN_ON(job->ibs[0].length_dw > num_dw);
fence = amdgpu_job_submit(job);
@@ -2196,11 +2200,9 @@ u32 amdgpu_ttm_set_buffer_funcs_status(struct 
amdgpu_device *adev, bool enable)
                return windows;
if (enable) {
-               struct amdgpu_ring *ring;
                struct drm_gpu_scheduler *sched;
- ring = adev->mman.buffer_funcs_ring;
-               sched = &ring->sched;
+               sched = adev->mman.buffer_funcs_scheds[0];
                r = drm_sched_entity_init(&adev->mman.default_entity.base,
                                          DRM_SCHED_PRIORITY_KERNEL, &sched,
                                          1, NULL);
@@ -2432,7 +2434,7 @@ int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
                            struct dma_fence **fence)
  {
        struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-       struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
+       struct amdgpu_ring *ring;
        struct amdgpu_ttm_buffer_entity *entity;
        struct amdgpu_res_cursor cursor;
        u64 addr;
@@ -2443,6 +2445,8 @@ int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
if (!fence)
                return -EINVAL;
+
+       ring = container_of(adev->mman.buffer_funcs_scheds[0], struct 
amdgpu_ring, sched);
        entity = &adev->mman.clear_entities[0];
        *fence = dma_fence_get_stub();
@@ -2494,9 +2498,9 @@ int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
                       u64 k_job_id)
  {
        struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-       struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
        struct dma_fence *fence = NULL;
        struct amdgpu_res_cursor dst;
+       struct amdgpu_ring *ring;
        int r, e;
if (!adev->mman.buffer_funcs_enabled) {
@@ -2505,6 +2509,8 @@ int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity 
*entity,
                return -EINVAL;
        }
+ ring = container_of(adev->mman.buffer_funcs_scheds[0], struct amdgpu_ring, sched);
+
        if (entity == NULL) {
                e = atomic_inc_return(&adev->mman.next_clear_entity) %
                                      adev->mman.num_clear_entities;
@@ -2579,6 +2585,27 @@ int amdgpu_ttm_evict_resources(struct amdgpu_device 
*adev, int mem_type)
        return ttm_resource_manager_evict_all(&adev->mman.bdev, man);
  }
+void amdgpu_sdma_set_buffer_funcs_scheds(struct amdgpu_device *adev,
+                                        const struct amdgpu_buffer_funcs 
*buffer_funcs)
+{
+       struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB(0)];
+       struct drm_gpu_scheduler *sched;
+       int i;
+
+       adev->mman.buffer_funcs = buffer_funcs;
+
+       for (i = 0; i < adev->sdma.num_instances; i++) {
+               if (adev->sdma.has_page_queue)
+                       sched = &adev->sdma.instance[i].page.sched;
+               else
+                       sched = &adev->sdma.instance[i].ring.sched;
+               adev->mman.buffer_funcs_scheds[i] = sched;
+       }
+
+       adev->mman.num_buffer_funcs_scheds = hub->sdma_invalidation_workaround ?
+               1 : adev->sdma.num_instances;
+}
+
  #if defined(CONFIG_DEBUG_FS)
static int amdgpu_ttm_page_pool_show(struct seq_file *m, void *unused)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
index 4844f001f590..63c3e2466708 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
@@ -66,7 +66,8 @@ struct amdgpu_mman {
/* buffer handling */
        const struct amdgpu_buffer_funcs        *buffer_funcs;
-       struct amdgpu_ring                      *buffer_funcs_ring;
+       struct drm_gpu_scheduler                
*buffer_funcs_scheds[AMDGPU_MAX_RINGS];
+       u32                                     num_buffer_funcs_scheds;
        bool                                    buffer_funcs_enabled;
struct mutex gtt_window_lock;
diff --git a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c 
b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
index 5fe162f52c92..a36385ad8da8 100644
--- a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
@@ -1333,8 +1333,7 @@ static const struct amdgpu_buffer_funcs 
cik_sdma_buffer_funcs = {
static void cik_sdma_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       adev->mman.buffer_funcs = &cik_sdma_buffer_funcs;
-       adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
+       amdgpu_sdma_set_buffer_funcs_scheds(adev, &cik_sdma_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs cik_sdma_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
index 63636643db3d..4a3ba136a36c 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
@@ -1228,8 +1228,7 @@ static const struct amdgpu_buffer_funcs 
sdma_v2_4_buffer_funcs = {
static void sdma_v2_4_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       adev->mman.buffer_funcs = &sdma_v2_4_buffer_funcs;
-       adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
+       amdgpu_sdma_set_buffer_funcs_scheds(adev, &sdma_v2_4_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs sdma_v2_4_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index 0153626b5df2..3cf527bcadf6 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -1670,8 +1670,7 @@ static const struct amdgpu_buffer_funcs 
sdma_v3_0_buffer_funcs = {
static void sdma_v3_0_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       adev->mman.buffer_funcs = &sdma_v3_0_buffer_funcs;
-       adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
+       amdgpu_sdma_set_buffer_funcs_scheds(adev, &sdma_v3_0_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs sdma_v3_0_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 96a67b30854c..7e106baecad5 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -2608,11 +2608,7 @@ static const struct amdgpu_buffer_funcs 
sdma_v4_0_buffer_funcs = {
static void sdma_v4_0_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       adev->mman.buffer_funcs = &sdma_v4_0_buffer_funcs;
-       if (adev->sdma.has_page_queue)
-               adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].page;
-       else
-               adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
+       amdgpu_sdma_set_buffer_funcs_scheds(adev, &sdma_v4_0_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs sdma_v4_0_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c
index 04dc8a8f4d66..7cb0e213bab2 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c
@@ -2309,11 +2309,7 @@ static const struct amdgpu_buffer_funcs 
sdma_v4_4_2_buffer_funcs = {
static void sdma_v4_4_2_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       adev->mman.buffer_funcs = &sdma_v4_4_2_buffer_funcs;
-       if (adev->sdma.has_page_queue)
-               adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].page;
-       else
-               adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
+       amdgpu_sdma_set_buffer_funcs_scheds(adev, &sdma_v4_4_2_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs sdma_v4_4_2_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
index 19c717f2c602..eab09c5fc762 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
@@ -2066,10 +2066,8 @@ static const struct amdgpu_buffer_funcs 
sdma_v5_0_buffer_funcs = {
static void sdma_v5_0_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       if (adev->mman.buffer_funcs == NULL) {
-               adev->mman.buffer_funcs = &sdma_v5_0_buffer_funcs;
-               adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
-       }
+       if (adev->mman.buffer_funcs == NULL)
+               amdgpu_sdma_set_buffer_funcs_scheds(adev, 
&sdma_v5_0_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs sdma_v5_0_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
index 7a07b8f4e86d..e843da1dce59 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
@@ -2076,10 +2076,8 @@ static const struct amdgpu_buffer_funcs 
sdma_v5_2_buffer_funcs = {
static void sdma_v5_2_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       if (adev->mman.buffer_funcs == NULL) {
-               adev->mman.buffer_funcs = &sdma_v5_2_buffer_funcs;
-               adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
-       }
+       if (adev->mman.buffer_funcs == NULL)
+               amdgpu_sdma_set_buffer_funcs_scheds(adev, 
&sdma_v5_2_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs sdma_v5_2_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
index 8f8228c7adee..d078bff42983 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
@@ -1884,8 +1884,7 @@ static const struct amdgpu_buffer_funcs 
sdma_v6_0_buffer_funcs = {
static void sdma_v6_0_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       adev->mman.buffer_funcs = &sdma_v6_0_buffer_funcs;
-       adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
+       amdgpu_sdma_set_buffer_funcs_scheds(adev, &sdma_v6_0_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs sdma_v6_0_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
index cf412d8fb0ed..77ad6f128e75 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
@@ -1826,8 +1826,7 @@ static const struct amdgpu_buffer_funcs 
sdma_v7_0_buffer_funcs = {
static void sdma_v7_0_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       adev->mman.buffer_funcs = &sdma_v7_0_buffer_funcs;
-       adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
+       amdgpu_sdma_set_buffer_funcs_scheds(adev, &sdma_v7_0_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs sdma_v7_0_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdgpu/si_dma.c 
b/drivers/gpu/drm/amd/amdgpu/si_dma.c
index 863e00086c30..4f6d7eeceb37 100644
--- a/drivers/gpu/drm/amd/amdgpu/si_dma.c
+++ b/drivers/gpu/drm/amd/amdgpu/si_dma.c
@@ -826,8 +826,7 @@ static const struct amdgpu_buffer_funcs si_dma_buffer_funcs 
= {
static void si_dma_set_buffer_funcs(struct amdgpu_device *adev)
  {
-       adev->mman.buffer_funcs = &si_dma_buffer_funcs;
-       adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
+       amdgpu_sdma_set_buffer_funcs_scheds(adev, &si_dma_buffer_funcs);
  }
static const struct amdgpu_vm_pte_funcs si_dma_vm_pte_funcs = {
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
index 943c3438c7ee..3f7b85aabb72 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
@@ -129,13 +129,14 @@ svm_migrate_copy_memory_gart(struct amdgpu_device *adev, 
dma_addr_t *sys,
                             struct dma_fence **mfence)
  {
        const u64 GTT_MAX_PAGES = AMDGPU_GTT_MAX_TRANSFER_SIZE;
-       struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
+       struct amdgpu_ring *ring;
        struct amdgpu_ttm_buffer_entity *entity;
        u64 gart_s, gart_d;
        struct dma_fence *next;
        u64 size;
        int r;
+ ring = container_of(adev->mman.buffer_funcs_scheds[0], struct amdgpu_ring, sched);
        entity = &adev->mman.move_entities[0];
mutex_lock(&entity->gart_window_lock);

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