diff options
| author | Chunming Zhou <David1.Zhou@amd.com> | 2017-04-21 15:51:04 +0800 |
|---|---|---|
| committer | Chunming Zhou <David1.Zhou@amd.com> | 2017-04-28 10:33:02 +0800 |
| commit | 844104e7320d32d78f557acda9bcb579b7ab4332 (patch) | |
| tree | eccf174ebddee6bff7103c1eda5a41c24e0f73d5 | |
| parent | aeff9ac51524ff21fc14d522e659f300907151e7 (diff) | |
drm/amdgpu: add limitation for dedicated vm number v4
v2: move #define to amdgpu_vm.h
v3: move reserved vmid counter to id_manager,
and increase counter before allocating vmid
v4: rename to reserved_vmid_num
Change-Id: Ie5958cf6dbdc1c8278e61d9158483472d6f5c6e3
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 3 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index b0314f7779ef..37205cb56e25 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -551,6 +551,7 @@ static void amdgpu_vm_free_reserved_vmid(struct amdgpu_device *adev, list_add(&vm->reserved_vmid[vmhub]->list, &id_mgr->ids_lru); vm->reserved_vmid[vmhub] = NULL; + atomic_dec(&id_mgr->reserved_vmid_num); } mutex_unlock(&id_mgr->lock); } @@ -567,6 +568,13 @@ static int amdgpu_vm_alloc_reserved_vmid(struct amdgpu_device *adev, mutex_lock(&id_mgr->lock); if (vm->reserved_vmid[vmhub]) goto unlock; + if (atomic_inc_return(&id_mgr->reserved_vmid_num) > + AMDGPU_VM_MAX_RESERVED_VMID) { + DRM_ERROR("Over limitation of reserved vmid\n"); + atomic_dec(&id_mgr->reserved_vmid_num); + r = -EINVAL; + goto unlock; + } /* Select the first entry VMID */ idle = list_first_entry(&id_mgr->ids_lru, struct amdgpu_vm_id, list); list_del_init(&idle->list); @@ -2300,6 +2308,7 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev) mutex_init(&id_mgr->lock); INIT_LIST_HEAD(&id_mgr->ids_lru); + atomic_set(&id_mgr->reserved_vmid_num, 0); /* skip over VMID 0, since it is the system VM */ for (j = 1; j < id_mgr->num_ids; ++j) { diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h index e91a18ea72df..abc0bab13f97 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h @@ -84,6 +84,8 @@ struct amdgpu_bo_list_entry; /* hardcode that limit for now */ #define AMDGPU_VA_RESERVED_SIZE (8 << 20) +/* max vmids dedicated for process */ +#define AMDGPU_VM_MAX_RESERVED_VMID 1 struct amdgpu_vm_pt { struct amdgpu_bo *bo; @@ -154,6 +156,7 @@ struct amdgpu_vm_id_manager { unsigned num_ids; struct list_head ids_lru; struct amdgpu_vm_id ids[AMDGPU_NUM_VM]; + atomic_t reserved_vmid_num; }; struct amdgpu_vm_manager { |