drm/gem: rename struct drm_gem_dma_object.{paddr => dma_addr}

The field paddr of struct drm_gem_dma_object holds a DMA address, which
might actually be a physical address. However, depending on the platform,
it can also be a bus address or a virtual address managed by an IOMMU.

Hence, rename the field to dma_addr, which is more applicable.

In order to do this renaming the following coccinelle script was used:

```
	@@
	struct drm_gem_dma_object *gem;
	@@

	- gem->paddr
	+ gem->dma_addr

	@@
	struct drm_gem_dma_object gem;
	@@

	- gem.paddr
	+ gem.dma_addr

	@exists@
	typedef dma_addr_t;
	symbol paddr;
	@@

	dma_addr_t paddr;
	<...
	- paddr
	+ dma_addr
	...>

	@@
	symbol paddr;
	@@
	dma_addr_t
	- paddr
	+ dma_addr
	;

```

This patch is compile-time tested with:

```
	make ARCH={x86_64,arm,arm64} allyesconfig
	make ARCH={x86_64,arm,arm64} drivers/gpu/drm`
```

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220802000405.949236-5-dakr@redhat.com

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
index 56a0af281b92..628d40ff3aa1 100644
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -126,7 +126,7 @@ vc4_get_hang_state_ioctl(struct drm_device *dev, void *data,
 			goto err_delete_handle;
 		}
 		bo_state[i].handle = handle;
-		bo_state[i].paddr = vc4_bo->base.paddr;
+		bo_state[i].paddr = vc4_bo->base.dma_addr;
 		bo_state[i].size = vc4_bo->base.base.size;
 	}
 
@@ -917,16 +917,16 @@ vc4_get_bcl(struct drm_device *dev, struct vc4_exec_info *exec)
 	list_add_tail(&to_vc4_bo(&exec->exec_bo->base)->unref_head,
 		      &exec->unref_list);
 
-	exec->ct0ca = exec->exec_bo->paddr + bin_offset;
+	exec->ct0ca = exec->exec_bo->dma_addr + bin_offset;
 
 	exec->bin_u = bin;
 
 	exec->shader_rec_v = exec->exec_bo->vaddr + shader_rec_offset;
-	exec->shader_rec_p = exec->exec_bo->paddr + shader_rec_offset;
+	exec->shader_rec_p = exec->exec_bo->dma_addr + shader_rec_offset;
 	exec->shader_rec_size = args->shader_rec_size;
 
 	exec->uniforms_v = exec->exec_bo->vaddr + uniforms_offset;
-	exec->uniforms_p = exec->exec_bo->paddr + uniforms_offset;
+	exec->uniforms_p = exec->exec_bo->dma_addr + uniforms_offset;
 	exec->uniforms_size = args->uniforms_size;
 
 	ret = vc4_validate_bin_cl(dev,