the pd/pt shadow bo will be used to backup page table, when gpu reset
happens, we can restore the page table by them.
Change-Id: I31eeb581f203d1db0654a48745ef4e64ed40ed9b
Signed-off-by: Chunming Zhou <david1.z...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 16 +++++++++++++---
2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 7b4a0cf..4b3c6d2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -869,6 +869,8 @@ struct amdgpu_ring {
struct amdgpu_vm_pt {
struct amdgpu_bo_list_entry entry;
uint64_t addr;
+ struct amdgpu_bo_list_entry entry_shadow;
+ uint64_t addr_shadow;
};
struct amdgpu_vm {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 38c80ea..aedd1cb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1331,9 +1331,10 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
/* walk over the address space and allocate the page tables */
for (pt_idx = saddr; pt_idx <= eaddr; ++pt_idx) {
struct reservation_object *resv = vm->page_directory->tbo.resv;
- struct amdgpu_bo_list_entry *entry;
+ struct amdgpu_bo_list_entry *entry, *entry_shadow;
struct amdgpu_bo *pt;
+ entry_shadow = &vm->page_tables[pt_idx].entry_shadow;
entry = &vm->page_tables[pt_idx].entry;
if (entry->robj)
continue;
@@ -1341,7 +1342,8 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
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_NO_CPU_ACCESS |
+ AMDGPU_GEM_CREATE_SHADOW,
NULL, resv, &pt);
if (r)
goto error_free;
@@ -1363,6 +1365,13 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
entry->tv.shared = true;
entry->user_pages = NULL;
vm->page_tables[pt_idx].addr = 0;
+
+ entry_shadow->robj = pt->shadow;
+ entry_shadow->priority = 0;
+ entry_shadow->tv.bo = &entry_shadow->robj->tbo;
+ entry_shadow->tv.shared = true;
+ entry_shadow->user_pages = NULL;
+ vm->page_tables[pt_idx].addr_shadow = 0;
}
return 0;
@@ -1540,7 +1549,8 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct
amdgpu_vm *vm)
r = amdgpu_bo_create(adev, pd_size, align, true,
AMDGPU_GEM_DOMAIN_VRAM,
- AMDGPU_GEM_CREATE_NO_CPU_ACCESS,
+ AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
+ AMDGPU_GEM_CREATE_SHADOW,
NULL, NULL, &vm->page_directory);
if (r)
goto error_free_sched_entity;
--
1.9.1
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