From: Christian König <christian.koe...@amd.com>
Stop using the VM mutex for this
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/radeon/radeon.h | 3 +++
drivers/gpu/drm/radeon/radeon_vm.c | 36 ++++++++++++++++++++++++++++++------
2 files changed, 33 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index da1c549..3680cf0 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -929,6 +929,9 @@ struct radeon_vm {
struct rb_root va;
+ /* ptotecting invalidated and freed */
+ spinlock_t status_lock;
+
/* BOs moved, but not yet updated in the PT */
struct list_head invalidated;
diff --git a/drivers/gpu/drm/radeon/radeon_vm.c
b/drivers/gpu/drm/radeon/radeon_vm.c
index 6bc3821..cde48c4 100644
--- a/drivers/gpu/drm/radeon/radeon_vm.c
+++ b/drivers/gpu/drm/radeon/radeon_vm.c
@@ -487,7 +487,9 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev,
tmp->vm = vm;
tmp->addr = bo_va->addr;
tmp->bo = radeon_bo_ref(bo_va->bo);
+ spin_lock(&vm->status_lock);
list_add(&tmp->vm_status, &vm->freed);
+ spin_unlock(&vm->status_lock);
}
interval_tree_remove(&bo_va->it, &vm->va);
@@ -913,7 +915,9 @@ int radeon_vm_bo_update(struct radeon_device *rdev,
return -EINVAL;
}
+ spin_lock(&vm->status_lock);
list_del_init(&bo_va->vm_status);
+ spin_unlock(&vm->status_lock);
bo_va->flags &= ~RADEON_VM_PAGE_VALID;
bo_va->flags &= ~RADEON_VM_PAGE_SYSTEM;
@@ -1028,17 +1032,25 @@ int radeon_vm_bo_update(struct radeon_device *rdev,
int radeon_vm_clear_freed(struct radeon_device *rdev,
struct radeon_vm *vm)
{
- struct radeon_bo_va *bo_va, *tmp;
+ struct radeon_bo_va *bo_va;
int r;
- list_for_each_entry_safe(bo_va, tmp, &vm->freed, vm_status) {
+ spin_lock(&vm->status_lock);
+ while (!list_empty(&vm->freed)) {
+ bo_va = list_first_entry(&vm->freed,
+ struct radeon_bo_va, vm_status);
+ spin_unlock(&vm->status_lock);
+
r = radeon_vm_bo_update(rdev, bo_va, NULL);
radeon_bo_unref(&bo_va->bo);
radeon_fence_unref(&bo_va->last_pt_update);
kfree(bo_va);
if (r)
return r;
+
+ spin_lock(&vm->status_lock);
}
+ spin_unlock(&vm->status_lock);
return 0;
}
@@ -1057,14 +1069,23 @@ int radeon_vm_clear_freed(struct radeon_device *rdev,
int radeon_vm_clear_invalids(struct radeon_device *rdev,
struct radeon_vm *vm)
{
- struct radeon_bo_va *bo_va, *tmp;
+ struct radeon_bo_va *bo_va;
int r;
- list_for_each_entry_safe(bo_va, tmp, &vm->invalidated, vm_status) {
+ spin_lock(&vm->status_lock);
+ while (!list_empty(&vm->invalidated)) {
+ bo_va = list_first_entry(&vm->invalidated,
+ struct radeon_bo_va, vm_status);
+ spin_unlock(&vm->status_lock);
+
r = radeon_vm_bo_update(rdev, bo_va, NULL);
if (r)
return r;
+
+ spin_lock(&vm->status_lock);
}
+ spin_unlock(&vm->status_lock);
+
return 0;
}
@@ -1087,6 +1108,7 @@ void radeon_vm_bo_rmv(struct radeon_device *rdev,
mutex_lock(&vm->mutex);
interval_tree_remove(&bo_va->it, &vm->va);
+ spin_lock(&vm->status_lock);
list_del(&bo_va->vm_status);
if (bo_va->addr) {
@@ -1096,6 +1118,7 @@ void radeon_vm_bo_rmv(struct radeon_device *rdev,
radeon_fence_unref(&bo_va->last_pt_update);
kfree(bo_va);
}
+ spin_unlock(&vm->status_lock);
mutex_unlock(&vm->mutex);
}
@@ -1116,10 +1139,10 @@ void radeon_vm_bo_invalidate(struct radeon_device *rdev,
list_for_each_entry(bo_va, &bo->va, bo_list) {
if (bo_va->addr) {
- mutex_lock(&bo_va->vm->mutex);
+ spin_lock(&bo_va->vm->status_lock);
list_del(&bo_va->vm_status);
list_add(&bo_va->vm_status, &bo_va->vm->invalidated);
- mutex_unlock(&bo_va->vm->mutex);
+ spin_unlock(&bo_va->vm->status_lock);
}
}
}
@@ -1147,6 +1170,7 @@ int radeon_vm_init(struct radeon_device *rdev, struct
radeon_vm *vm)
}
mutex_init(&vm->mutex);
vm->va = RB_ROOT;
+ spin_lock_init(&vm->status_lock);
INIT_LIST_HEAD(&vm->invalidated);
INIT_LIST_HEAD(&vm->freed);
--
1.9.1
