For dynamically mapping added backup memory of lima_bo to vm. This is a preparation for adding heap buffer support.
Signed-off-by: Qiang Yu yuq825@gmail.com --- drivers/gpu/drm/lima/lima_vm.c | 40 ++++++++++++++++++++++++++++++++++ drivers/gpu/drm/lima/lima_vm.h | 1 + 2 files changed, 41 insertions(+)
diff --git a/drivers/gpu/drm/lima/lima_vm.c b/drivers/gpu/drm/lima/lima_vm.c index 840e2350d872..d46f2a69ab42 100644 --- a/drivers/gpu/drm/lima/lima_vm.c +++ b/drivers/gpu/drm/lima/lima_vm.c @@ -277,3 +277,43 @@ void lima_vm_print(struct lima_vm *vm) } } } + +int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff) +{ + struct lima_bo_va *bo_va; + struct sg_dma_page_iter sg_iter; + int offset = 0, err; + u32 base; + + mutex_lock(&bo->lock); + + bo_va = lima_vm_bo_find(vm, bo); + if (!bo_va) { + err = -ENOENT; + goto err_out0; + } + + mutex_lock(&vm->lock); + + base = bo_va->node.start + (pageoff << PAGE_SHIFT); + for_each_sg_dma_page(bo->base.sgt->sgl, &sg_iter, bo->base.sgt->nents, pageoff) { + err = lima_vm_map_page(vm, sg_page_iter_dma_address(&sg_iter), base + offset); + if (err) + goto err_out1; + + offset += PAGE_SIZE; + } + + mutex_unlock(&vm->lock); + + mutex_unlock(&bo->lock); + return 0; + +err_out1: + if (offset) + lima_vm_unmap_range(vm, base, base + offset - 1); + mutex_unlock(&vm->lock); +err_out0: + mutex_unlock(&bo->lock); + return err; +} diff --git a/drivers/gpu/drm/lima/lima_vm.h b/drivers/gpu/drm/lima/lima_vm.h index e0bdedcf14dd..22aeec77d84d 100644 --- a/drivers/gpu/drm/lima/lima_vm.h +++ b/drivers/gpu/drm/lima/lima_vm.h @@ -58,5 +58,6 @@ static inline void lima_vm_put(struct lima_vm *vm) }
void lima_vm_print(struct lima_vm *vm); +int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff);
#endif