drm/amdgpu: let amdgpu_vm_clear_bo figure out ats status v2

Instead of providing it from outside figure out the ats status in the
function itself from the data structures.

v2: simplify finding the right level
v3: partially revert changes from v2, more cleanup and split code
    into more functions.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index d9a0ac1..90c6970 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -183,6 +183,22 @@ static unsigned amdgpu_vm_num_entries(struct amdgpu_device *adev,
 }
 
 /**
+ * amdgpu_vm_num_ats_entries - return the number of ATS entries in the root PD
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Returns:
+ * The number of entries in the root page directory which needs the ATS setting.
+ */
+static unsigned amdgpu_vm_num_ats_entries(struct amdgpu_device *adev)
+{
+       unsigned shift;
+
+       shift = amdgpu_vm_level_shift(adev, adev->vm_manager.root_level);
+       return AMDGPU_GMC_HOLE_START >> (shift + AMDGPU_GPU_PAGE_SHIFT);
+}
+
+/**
  * amdgpu_vm_entries_mask - the mask to get the entry number of a PD/PT
  *
  * @adev: amdgpu_device pointer
@@ -747,8 +763,6 @@ bool amdgpu_vm_ready(struct amdgpu_vm *vm)
  * @adev: amdgpu_device pointer
  * @vm: VM to clear BO from
  * @bo: BO to clear
- * @level: level this BO is at
- * @pte_support_ats: indicate ATS support from PTE
  *
  * Root PD needs to be reserved when calling this.
  *
@@ -756,10 +770,12 @@ bool amdgpu_vm_ready(struct amdgpu_vm *vm)
  * 0 on success, errno otherwise.
  */
 static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
-                             struct amdgpu_vm *vm, struct amdgpu_bo *bo,
-                             unsigned level, bool pte_support_ats)
+                             struct amdgpu_vm *vm,
+                             struct amdgpu_bo *bo)
 {
        struct ttm_operation_ctx ctx = { true, false };
+       unsigned level = adev->vm_manager.root_level;
+       struct amdgpu_bo *ancestor = bo;
        struct dma_fence *fence = NULL;
        unsigned entries, ats_entries;
        struct amdgpu_ring *ring;
@@ -767,21 +783,35 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
        uint64_t addr;
        int r;
 
+       /* Figure out our place in the hierarchy */
+       if (ancestor->parent) {
+               ++level;
+               while (ancestor->parent->parent) {
+                       ++level;
+                       ancestor = ancestor->parent;
+               }
+       }
+
        entries = amdgpu_bo_size(bo) / 8;
+       if (!vm->pte_support_ats) {
+               ats_entries = 0;
+
+       } else if (!bo->parent) {
+               ats_entries = amdgpu_vm_num_ats_entries(adev);
+               ats_entries = min(ats_entries, entries);
+               entries -= ats_entries;
 
-       if (pte_support_ats) {
-               if (level == adev->vm_manager.root_level) {
-                       ats_entries = amdgpu_vm_level_shift(adev, level);
-                       ats_entries += AMDGPU_GPU_PAGE_SHIFT;
-                       ats_entries = AMDGPU_GMC_HOLE_START >> ats_entries;
-                       ats_entries = min(ats_entries, entries);
-                       entries -= ats_entries;
+       } else {
+               struct amdgpu_vm_pt *pt;
+
+               pt = container_of(ancestor->vm_bo, struct amdgpu_vm_pt, base);
+               ats_entries = amdgpu_vm_num_ats_entries(adev);
+               if ((pt - vm->root.entries) >= ats_entries) {
+                       ats_entries = 0;
                } else {
                        ats_entries = entries;
                        entries = 0;
                }
-       } else {
-               ats_entries = 0;
        }
 
        ring = container_of(vm->entity.rq->sched, struct amdgpu_ring, sched);
@@ -908,7 +938,6 @@ int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 {
        struct amdgpu_vm_pt_cursor cursor;
        struct amdgpu_bo *pt;
-       bool ats = false;
        uint64_t eaddr;
        int r;
 
@@ -918,9 +947,6 @@ int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 
        eaddr = saddr + size - 1;
 
-       if (vm->pte_support_ats)
-               ats = saddr < AMDGPU_GMC_HOLE_START;
-
        saddr /= AMDGPU_GPU_PAGE_SIZE;
        eaddr /= AMDGPU_GPU_PAGE_SIZE;
 
@@ -969,7 +995,7 @@ int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 
                amdgpu_vm_bo_base_init(&entry->base, vm, pt);
 
-               r = amdgpu_vm_clear_bo(adev, vm, pt, cursor.level, ats);
+               r = amdgpu_vm_clear_bo(adev, vm, pt);
                if (r)
                        goto error_free_pt;
        }
@@ -3044,9 +3070,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 
        amdgpu_vm_bo_base_init(&vm->root.base, vm, root);
 
-       r = amdgpu_vm_clear_bo(adev, vm, root,
-                              adev->vm_manager.root_level,
-                              vm->pte_support_ats);
+       r = amdgpu_vm_clear_bo(adev, vm, root);
        if (r)
                goto error_unreserve;
 
@@ -3141,9 +3165,8 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, uns
         * changing any other state, in case it fails.
         */
        if (pte_support_ats != vm->pte_support_ats) {
-               r = amdgpu_vm_clear_bo(adev, vm, vm->root.base.bo,
-                              adev->vm_manager.root_level,
-                              pte_support_ats);
+               vm->pte_support_ats = pte_support_ats;
+               r = amdgpu_vm_clear_bo(adev, vm, vm->root.base.bo);
                if (r)
                        goto free_idr;
        }
@@ -3151,7 +3174,6 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, uns
        /* Update VM state */
        vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
                                    AMDGPU_VM_USE_CPU_FOR_COMPUTE);
-       vm->pte_support_ats = pte_support_ats;
        DRM_DEBUG_DRIVER("VM update mode is %s\n",
                         vm->use_cpu_for_update ? "CPU" : "SDMA");
        WARN_ONCE((vm->use_cpu_for_update && !amdgpu_gmc_vram_full_visible(&adev->gmc)),