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@xxxxxxxxx>
---
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
--
2.17.1
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