drm/lima: add lima_vm_map_bo

For dynamically mapping added backup memory of lima_bo to vm.
This is a preparation for adding heap buffer support.

Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Andreas Baierl <ichgeh@imkreisrum.de>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200116131157.13346-3-yuq825@gmail.com

diff --git a/drivers/gpu/drm/lima/lima_vm.c b/drivers/gpu/drm/lima/lima_vm.c
index 840e235..2e51384 100644 (file)
--- a/drivers/gpu/drm/lima/lima_vm.c
+++ b/drivers/gpu/drm/lima/lima_vm.c
@@ -277,3 +277,45 @@ 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 e0bdedc..22aeec7 100644 (file)
--- 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