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drm/amdgpu: add alloc/free for multi level PDs V2 

Allocate and free page directories on demand.

V2:
a. clear entries allocation
b. fix entries index calculation
c. need alloc sub level even parent bo was allocated

Signed-off-by: Christian König <christian.koenig@amd.com> (v1)
Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com> (v2)
Acked-by: Alex Deucher <alexander.deucher@amd.com> (v2)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-10-27 20:04:38 +02:00 committed by Alex Deucher
parent 4e2cb640c2
commit f566ceb165
1 changed files with 106 additions and 69 deletions
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175
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -244,6 +244,84 @@ void amdgpu_vm_move_pt_bos_in_lru(struct amdgpu_device *adev,
spin_unlock(&glob->lru_lock);
}
/**
* 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;
memset(parent->entries, 0 , sizeof(struct amdgpu_vm_pt));
}
from = (saddr >> shift) % amdgpu_vm_num_entries(adev, level);
to = (eaddr >> shift) % amdgpu_vm_num_entries(adev, level);
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) {
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_alloc_pts - Allocate page tables.
*
@ -258,9 +336,8 @@ int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
struct amdgpu_vm *vm,
uint64_t saddr, uint64_t size)
{
unsigned last_pfn, pt_idx;
unsigned last_pfn;
uint64_t eaddr;
int r;
/* validate the parameters */
if (saddr & AMDGPU_GPU_PAGE_MASK || size & AMDGPU_GPU_PAGE_MASK)
@ -277,43 +354,7 @@ int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
saddr /= AMDGPU_GPU_PAGE_SIZE;
eaddr /= AMDGPU_GPU_PAGE_SIZE;
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)
return r;
/* 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;
return amdgpu_vm_alloc_levels(adev, vm, &vm->root, saddr, eaddr, 0);
}
static bool amdgpu_vm_is_gpu_reset(struct amdgpu_device *adev,
@ -1993,7 +2034,6 @@ 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;
@ -2008,16 +2048,6 @@ 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);
@ -2027,11 +2057,11 @@ 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 |
@ -2058,12 +2088,32 @@ error_free_root:
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
*
@ -2077,7 +2127,6 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
{
struct amdgpu_bo_va_mapping *mapping, *tmp;
bool prt_fini_needed = !!adev->gart.gart_funcs->set_prt;
int i;
amd_sched_entity_fini(vm->entity.sched, &vm->entity);
@ -2099,19 +2148,7 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
amdgpu_vm_free_mapping(adev, vm, mapping, NULL);
}
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);
dma_fence_put(vm->last_dir_update);
}