From: Christian König <christian.koenig@xxxxxxx>
Allocate and free page directories on demand.
Change-Id: I341b72b911377033257af888dd1a96ca54f586e9
Signed-off-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 178 ++++++++++++++++++++-------------
1 file changed, 107 insertions(+), 71 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 43747f8..71f90e5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1433,6 +1433,83 @@ struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
return bo_va;
}
+ /**
+ * amdgpu_vm_alloc_levels - allocate the PD/PT levels
+ *
+ * @adev: amdgpu_device pointer
+ * @vm: requested vm
+ * @saddr: start of the address range
+ * @eaddr: end of the address range
+ *
+ * Make sure the page directories and page tables are allocated
+ */
+static int amdgpu_vm_alloc_levels(struct amdgpu_device *adev,
+ struct amdgpu_vm *vm,
+ struct amdgpu_vm_pt *parent,
+ uint64_t saddr, uint64_t eaddr,
+ unsigned level)
+{
+ unsigned shift = (adev->vm_manager.num_level - level) *
+ amdgpu_vm_block_size;
+ unsigned pt_idx, from, to;
+ int r;
+
+ if (!parent->entries) {
+ unsigned num_entries = amdgpu_vm_num_entries(adev, level);
+
+ parent->entries = drm_calloc_large(num_entries,
+ sizeof(struct amdgpu_vm_pt));
+ if (!parent->entries)
+ return -ENOMEM;
+ }
+
+ from = saddr >> shift;
+ to = eaddr >> shift;
+
+ if (to > parent->last_entry_used)
+ parent->last_entry_used = to;
+
+ ++level;
+
+ /* walk over the address space and allocate the page tables */
+ for (pt_idx = from; pt_idx <= to; ++pt_idx) {
+ struct reservation_object *resv = vm->root.bo->tbo.resv;
+ struct amdgpu_vm_pt *entry = &parent->entries[pt_idx];
+ struct amdgpu_bo *pt;
+
+ if (entry->bo)
+ continue;
+
+ r = amdgpu_bo_create(adev, amdgpu_vm_bo_size(adev, level),
+ AMDGPU_GPU_PAGE_SIZE, true,
+ AMDGPU_GEM_DOMAIN_VRAM,
+ AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
+ AMDGPU_GEM_CREATE_SHADOW |
+ AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
+ AMDGPU_GEM_CREATE_VRAM_CLEARED,
+ NULL, resv, &pt);
+ if (r)
+ return r;
+
+ /* Keep a reference to the root directory to avoid
+ * freeing them up in the wrong order.
+ */
+ pt->parent = amdgpu_bo_ref(vm->root.bo);
+
+ entry->bo = pt;
+ entry->addr = 0;
+
+ if (level < adev->vm_manager.num_level) {
+ r = amdgpu_vm_alloc_levels(adev, vm, entry, saddr,
+ eaddr, level);
+ if (r)
+ return r;
+ }
+ }
+
+ return 0;
+}
+
/**
* amdgpu_vm_bo_map - map bo inside a vm
*
@@ -1455,7 +1532,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
struct amdgpu_bo_va_mapping *mapping;
struct amdgpu_vm *vm = bo_va->vm;
struct interval_tree_node *it;
- unsigned last_pfn, pt_idx;
+ unsigned last_pfn;
uint64_t eaddr;
int r;
@@ -1506,46 +1583,10 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
list_add(&mapping->list, &bo_va->invalids);
interval_tree_insert(&mapping->it, &vm->va);
- /* Make sure the page tables are allocated */
- saddr >>= amdgpu_vm_block_size;
- eaddr >>= amdgpu_vm_block_size;
-
- BUG_ON(eaddr >= amdgpu_vm_num_entries(adev, 0));
-
- if (eaddr > vm->root.last_entry_used)
- vm->root.last_entry_used = eaddr;
-
- /* walk over the address space and allocate the page tables */
- for (pt_idx = saddr; pt_idx <= eaddr; ++pt_idx) {
- struct reservation_object *resv = vm->root.bo->tbo.resv;
- struct amdgpu_bo *pt;
-
- if (vm->root.entries[pt_idx].bo)
- continue;
-
- r = amdgpu_bo_create(adev, AMDGPU_VM_PTE_COUNT * 8,
- AMDGPU_GPU_PAGE_SIZE, true,
- AMDGPU_GEM_DOMAIN_VRAM,
- AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
- AMDGPU_GEM_CREATE_SHADOW |
- AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
- AMDGPU_GEM_CREATE_VRAM_CLEARED,
- NULL, resv, &pt);
- if (r)
- goto error_free;
-
- /* Keep a reference to the page table to avoid freeing
- * them up in the wrong order.
- */
- pt->parent = amdgpu_bo_ref(vm->root.bo);
-
- vm->root.entries[pt_idx].bo = pt;
- vm->root.entries[pt_idx].addr = 0;
- }
-
- return 0;
+ r = amdgpu_vm_alloc_levels(adev, vm, &vm->root, saddr, eaddr, 0);
+ if (!r)
+ return 0;
-error_free:
list_del(&mapping->list);
interval_tree_remove(&mapping->it, &vm->va);
trace_amdgpu_vm_bo_unmap(bo_va, mapping);
@@ -1678,7 +1719,6 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
{
const unsigned align = min(AMDGPU_VM_PTB_ALIGN_SIZE,
AMDGPU_VM_PTE_COUNT * 8);
- unsigned pd_size, pd_entries;
unsigned ring_instance;
struct amdgpu_ring *ring;
struct amd_sched_rq *rq;
@@ -1693,17 +1733,6 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
INIT_LIST_HEAD(&vm->cleared);
INIT_LIST_HEAD(&vm->freed);
- pd_size = amdgpu_vm_bo_size(adev, 0);
- pd_entries = amdgpu_vm_num_entries(adev, 0);
-
- /* allocate page table array */
- vm->root.entries = drm_calloc_large(pd_entries,
- sizeof(struct amdgpu_vm_pt));
- if (vm->root.entries == NULL) {
- DRM_ERROR("Cannot allocate memory for page table array\n");
- return -ENOMEM;
- }
-
/* create scheduler entity for page table updates */
ring_instance = atomic_inc_return(&adev->vm_manager.vm_pte_next_ring);
@@ -1713,11 +1742,11 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
r = amd_sched_entity_init(&ring->sched, &vm->entity,
rq, amdgpu_sched_jobs);
if (r)
- goto err;
+ return r;
vm->last_dir_update = NULL;
- r = amdgpu_bo_create(adev, pd_size, align, true,
+ r = amdgpu_bo_create(adev, amdgpu_vm_bo_size(adev, 0), align, true,
AMDGPU_GEM_DOMAIN_VRAM,
AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
AMDGPU_GEM_CREATE_SHADOW |
@@ -1744,13 +1773,33 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
error_free_sched_entity:
amd_sched_entity_fini(&ring->sched, &vm->entity);
-err:
- drm_free_large(vm->root.entries);
-
return r;
}
/**
+ * amdgpu_vm_free_levels - free PD/PT levels
+ *
+ * @level: PD/PT starting level to free
+ *
+ * Free the page directory or page table level and all sub levels.
+ */
+static void amdgpu_vm_free_levels(struct amdgpu_vm_pt *level)
+{
+ unsigned i;
+
+ if (level->bo) {
+ amdgpu_bo_unref(&level->bo->shadow);
+ amdgpu_bo_unref(&level->bo);
+ }
+
+ if (level->entries)
+ for (i = 0; i <= level->last_entry_used; i++)
+ amdgpu_vm_free_levels(&level->entries[i]);
+
+ drm_free_large(level->entries);
+}
+
+/**
* amdgpu_vm_fini - tear down a vm instance
*
* @adev: amdgpu_device pointer
@@ -1762,7 +1811,6 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
{
struct amdgpu_bo_va_mapping *mapping, *tmp;
- int i;
amd_sched_entity_fini(vm->entity.sched, &vm->entity);
@@ -1779,19 +1827,7 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
kfree(mapping);
}
- for (i = 0; i < amdgpu_vm_num_entries(adev, 0); i++) {
- struct amdgpu_bo *pt = vm->root.entries[i].bo;
-
- if (!pt)
- continue;
-
- amdgpu_bo_unref(&pt->shadow);
- amdgpu_bo_unref(&pt);
- }
- drm_free_large(vm->root.entries);
-
- amdgpu_bo_unref(&vm->root.bo->shadow);
- amdgpu_bo_unref(&vm->root.bo);
+ amdgpu_vm_free_levels(&vm->root);
fence_put(vm->last_dir_update);
}
--
1.9.1
