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drm/amdgpu: update one PDE at a time v2 

Horrible inefficient, but avoids problems when the root PD size becomes
to big.

v2: remove incr as well.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <davdi1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2017-11-30 15:19:50 +01:00 коммит произвёл Alex Deucher
Родитель 94c6f5e4d1
Коммит b852f3d3fb
1 изменённых файлов: 36 добавлений и 48 удалений
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84
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -1069,18 +1069,20 @@ static int amdgpu_vm_wait_pd(struct amdgpu_device *adev, struct amdgpu_vm *vm,
* Makes sure all entries in @parent are up to date.
* Returns 0 for success, error for failure.
*/
static int amdgpu_vm_update_level(struct amdgpu_device *adev,
struct amdgpu_vm *vm,
struct amdgpu_vm_pt *parent)
static int amdgpu_vm_update_pde(struct amdgpu_device *adev,
struct amdgpu_vm *vm,
struct amdgpu_vm_pt *parent,
struct amdgpu_vm_pt *entry)
{
struct amdgpu_pte_update_params params;
struct amdgpu_bo *bo = entry->base.bo;
struct amdgpu_bo *shadow;
struct amdgpu_ring *ring = NULL;
uint64_t pd_addr, shadow_addr = 0;
unsigned pt_idx, ndw = 0;
struct amdgpu_job *job;
struct amdgpu_pte_update_params params;
struct dma_fence *fence = NULL;
uint32_t incr;
unsigned ndw = 0;
uint64_t pde, pt;
int r;
@ -1102,20 +1104,14 @@ static int amdgpu_vm_update_level(struct amdgpu_device *adev,
ring = container_of(vm->entity.sched, struct amdgpu_ring,
sched);
/* padding, etc. */
/* should be sufficient for two commands plus padding, etc. */
ndw = 64;
/* assume the worst case */
ndw += parent->last_entry_used * 6;
pd_addr = amdgpu_bo_gpu_offset(parent->base.bo);
if (shadow) {
if (shadow)
shadow_addr = amdgpu_bo_gpu_offset(shadow);
ndw *= 2;
} else {
else
shadow_addr = 0;
}
r = amdgpu_job_alloc_with_ib(adev, ndw * 4, &job);
if (r)
@ -1125,40 +1121,30 @@ static int amdgpu_vm_update_level(struct amdgpu_device *adev,
params.func = amdgpu_vm_do_set_ptes;
}
spin_lock(&vm->status_lock);
list_del_init(&entry->base.vm_status);
spin_unlock(&vm->status_lock);
/* walk over the address space and update the directory */
for (pt_idx = 0; pt_idx <= parent->last_entry_used; ++pt_idx) {
struct amdgpu_vm_pt *entry = &parent->entries[pt_idx];
struct amdgpu_bo *bo = entry->base.bo;
uint64_t pde, pt;
if (bo == NULL)
continue;
spin_lock(&vm->status_lock);
list_del_init(&entry->base.vm_status);
spin_unlock(&vm->status_lock);
pt = amdgpu_bo_gpu_offset(bo);
pt = amdgpu_gart_get_vm_pde(adev, pt);
/* Don't update huge pages here */
if ((parent->entries[pt_idx].addr & AMDGPU_PDE_PTE) ||
parent->entries[pt_idx].addr == (pt | AMDGPU_PTE_VALID))
continue;
parent->entries[pt_idx].addr = pt | AMDGPU_PTE_VALID;
incr = amdgpu_bo_size(bo);
if (shadow) {
pde = shadow_addr + pt_idx * 8;
params.func(&params, pde, pt, 1, incr,
AMDGPU_PTE_VALID);
}
pde = pd_addr + pt_idx * 8;
params.func(&params, pde, pt, 1, incr, AMDGPU_PTE_VALID);
pt = amdgpu_bo_gpu_offset(bo);
pt = amdgpu_gart_get_vm_pde(adev, pt);
/* Don't update huge pages here */
if (entry->addr & AMDGPU_PDE_PTE ||
entry->addr == (pt | AMDGPU_PTE_VALID)) {
if (!vm->use_cpu_for_update)
amdgpu_job_free(job);
return 0;
}
entry->addr = pt | AMDGPU_PTE_VALID;
if (shadow) {
pde = shadow_addr + (entry - parent->entries) * 8;
params.func(&params, pde, pt, 1, 0, AMDGPU_PTE_VALID);
}
pde = pd_addr + (entry - parent->entries) * 8;
params.func(&params, pde, pt, 1, 0, AMDGPU_PTE_VALID);
if (!vm->use_cpu_for_update) {
if (params.ib->length_dw == 0) {
amdgpu_job_free(job);
@ -1249,14 +1235,16 @@ int amdgpu_vm_update_directories(struct amdgpu_device *adev,
bo = bo_base->bo->parent;
if (bo) {
struct amdgpu_vm_bo_base *parent;
struct amdgpu_vm_pt *pt;
struct amdgpu_vm_pt *pt, *entry;
parent = list_first_entry(&bo->va,
struct amdgpu_vm_bo_base,
bo_list);
pt = container_of(parent, struct amdgpu_vm_pt, base);
entry = container_of(bo_base, struct amdgpu_vm_pt,
base);
r = amdgpu_vm_update_level(adev, vm, pt);
r = amdgpu_vm_update_pde(adev, vm, pt, entry);
if (r) {
amdgpu_vm_invalidate_level(vm, &vm->root);
return r;