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authorjimqu <Jim.Qu@amd.com>2015-12-04 17:17:00 +0800
committerAlex Deucher <alexander.deucher@amd.com>2015-12-04 13:08:13 -0500
commit81d75a30c6ed006a314f5c760196d04758660ca6 (patch)
treefcdfce8c4b048aab55b101845e8a53155eb7c55e
parent9c97b5ab4a91c18c2e7654f044cbff446cfd979b (diff)
downloadlinux-stericsson-81d75a30c6ed006a314f5c760196d04758660ca6.tar.gz
drm/amdgpu: add spin lock to protect freed list in vm (v2)
there is a protection fault about freed list when OCL test. add a spin lock to protect it. v2: drop changes in vm_fini Signed-off-by: JimQu <jim.qu@amd.com> Reviewed-by: Christian K├Ânig <christian.koenig@amd.com>
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu.h2
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c16
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 670fefb56945..5a5f04d0902d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -956,6 +956,8 @@ struct amdgpu_vm {
struct amdgpu_vm_id ids[AMDGPU_MAX_RINGS];
/* for interval tree */
spinlock_t it_lock;
+ /* protecting freed */
+ spinlock_t freed_lock;
};
struct amdgpu_vm_manager {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index a582ef553499..b53d273eb7a1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -885,17 +885,21 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
struct amdgpu_bo_va_mapping *mapping;
int r;
+ spin_lock(&vm->freed_lock);
while (!list_empty(&vm->freed)) {
mapping = list_first_entry(&vm->freed,
struct amdgpu_bo_va_mapping, list);
list_del(&mapping->list);
-
+ spin_unlock(&vm->freed_lock);
r = amdgpu_vm_bo_update_mapping(adev, vm, mapping, 0, 0, NULL);
kfree(mapping);
if (r)
return r;
+ spin_lock(&vm->freed_lock);
}
+ spin_unlock(&vm->freed_lock);
+
return 0;
}
@@ -1155,10 +1159,13 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
spin_unlock(&vm->it_lock);
trace_amdgpu_vm_bo_unmap(bo_va, mapping);
- if (valid)
+ if (valid) {
+ spin_lock(&vm->freed_lock);
list_add(&mapping->list, &vm->freed);
- else
+ spin_unlock(&vm->freed_lock);
+ } else {
kfree(mapping);
+ }
return 0;
}
@@ -1191,7 +1198,9 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
interval_tree_remove(&mapping->it, &vm->va);
spin_unlock(&vm->it_lock);
trace_amdgpu_vm_bo_unmap(bo_va, mapping);
+ spin_lock(&vm->freed_lock);
list_add(&mapping->list, &vm->freed);
+ spin_unlock(&vm->freed_lock);
}
list_for_each_entry_safe(mapping, next, &bo_va->invalids, list) {
list_del(&mapping->list);
@@ -1252,6 +1261,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
INIT_LIST_HEAD(&vm->cleared);
INIT_LIST_HEAD(&vm->freed);
spin_lock_init(&vm->it_lock);
+ spin_lock_init(&vm->freed_lock);
pd_size = amdgpu_vm_directory_size(adev);
pd_entries = amdgpu_vm_num_pdes(adev);