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drm/amdgpu: keep the owner for VMIDs 

We don't need the last VM use any more, keep the owner directly.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <davdi1.zhou@amd.com>
This commit is contained in:
Christian König 2015-11-14 21:31:40 +01:00 committed by Alex Deucher
parent ea89f8c9e8
commit 1c16c0a7b2
2 changed files with 24 additions and 17 deletions
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8
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -925,8 +925,6 @@ struct amdgpu_vm_id {
uint64_t pd_gpu_addr;
/* last flushed PD/PT update */
struct fence *flushed_updates;
/* last use of vmid */
struct fence *last_id_use;
};
struct amdgpu_vm {
@ -959,7 +957,11 @@ struct amdgpu_vm {
};
struct amdgpu_vm_manager {
struct fence *active[AMDGPU_NUM_VM];
struct {
struct fence *active;
atomic_long_t owner;
} ids[AMDGPU_NUM_VM];
uint32_t max_pfn;
/* number of VMIDs */
unsigned nvm;

33
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -143,10 +143,15 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
unsigned i;
/* check if the id is still valid */
if (vm_id->id && vm_id->last_id_use &&
vm_id->last_id_use == adev->vm_manager.active[vm_id->id]) {
trace_amdgpu_vm_grab_id(vm_id->id, ring->idx);
return 0;
if (vm_id->id) {
unsigned id = vm_id->id;
long owner;
owner = atomic_long_read(&adev->vm_manager.ids[id].owner);
if (owner == (long)vm) {
trace_amdgpu_vm_grab_id(vm_id->id, ring->idx);
return 0;
}
}
/* we definately need to flush */
@ -154,7 +159,7 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
/* skip over VMID 0, since it is the system VM */
for (i = 1; i < adev->vm_manager.nvm; ++i) {
struct fence *fence = adev->vm_manager.active[i];
struct fence *fence = adev->vm_manager.ids[i].active;
struct amdgpu_ring *fring;
if (fence == NULL) {
@ -176,7 +181,7 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
if (choices[i]) {
struct fence *fence;
fence = adev->vm_manager.active[choices[i]];
fence = adev->vm_manager.ids[choices[i]].active;
vm_id->id = choices[i];
trace_amdgpu_vm_grab_id(choices[i], ring->idx);
@ -246,11 +251,9 @@ void amdgpu_vm_fence(struct amdgpu_device *adev,
struct amdgpu_ring *ring = amdgpu_ring_from_fence(fence);
unsigned vm_id = vm->ids[ring->idx].id;
fence_put(adev->vm_manager.active[vm_id]);
adev->vm_manager.active[vm_id] = fence_get(fence);
fence_put(vm->ids[ring->idx].last_id_use);
vm->ids[ring->idx].last_id_use = fence_get(fence);
fence_put(adev->vm_manager.ids[vm_id].active);
adev->vm_manager.ids[vm_id].active = fence_get(fence);
atomic_long_set(&adev->vm_manager.ids[vm_id].owner, (long)vm);
}
/**
@ -1238,7 +1241,6 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
vm->ids[i].id = 0;
vm->ids[i].flushed_updates = NULL;
vm->ids[i].last_id_use = NULL;
}
mutex_init(&vm->mutex);
vm->va = RB_ROOT;
@ -1312,8 +1314,11 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
fence_put(vm->page_directory_fence);
for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
unsigned id = vm->ids[i].id;
atomic_long_cmpxchg(&adev->vm_manager.ids[id].owner,
(long)vm, 0);
fence_put(vm->ids[i].flushed_updates);
fence_put(vm->ids[i].last_id_use);
}
mutex_destroy(&vm->mutex);
@ -1331,5 +1336,5 @@ void amdgpu_vm_manager_fini(struct amdgpu_device *adev)
unsigned i;
for (i = 0; i < AMDGPU_NUM_VM; ++i)
fence_put(adev->vm_manager.active[i]);
fence_put(adev->vm_manager.ids[i].active);
}