diff options
Diffstat (limited to 'drivers/gpu/drm/panthor/panthor_mmu.c')
| -rw-r--r-- | drivers/gpu/drm/panthor/panthor_mmu.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c index fa0a002b1016..cc6e13a97783 100644 --- a/drivers/gpu/drm/panthor/panthor_mmu.c +++ b/drivers/gpu/drm/panthor/panthor_mmu.c @@ -576,6 +576,12 @@ static int mmu_hw_do_operation_locked(struct panthor_device *ptdev, int as_nr, if (as_nr < 0) return 0; + /* + * If the AS number is greater than zero, then we can be sure + * the device is up and running, so we don't need to explicitly + * power it up + */ + if (op != AS_COMMAND_UNLOCK) lock_region(ptdev, as_nr, iova, size); @@ -874,14 +880,23 @@ static int panthor_vm_flush_range(struct panthor_vm *vm, u64 iova, u64 size) if (!drm_dev_enter(&ptdev->base, &cookie)) return 0; - /* Flush the PTs only if we're already awake */ - if (pm_runtime_active(ptdev->base.dev)) - ret = mmu_hw_do_operation(vm, iova, size, AS_COMMAND_FLUSH_PT); + ret = mmu_hw_do_operation(vm, iova, size, AS_COMMAND_FLUSH_PT); drm_dev_exit(cookie); return ret; } +/** + * panthor_vm_flush_all() - Flush L2 caches for the entirety of a VM's AS + * @vm: VM whose cache to flush + * + * Return: 0 on success, a negative error code if flush failed. + */ +int panthor_vm_flush_all(struct panthor_vm *vm) +{ + return panthor_vm_flush_range(vm, vm->base.mm_start, vm->base.mm_range); +} + static int panthor_vm_unmap_pages(struct panthor_vm *vm, u64 iova, u64 size) { struct panthor_device *ptdev = vm->ptdev; |