[PATCH 33/33] powerpc/dma: trim the fat from

Christoph Hellwig
2018-10-09T13:26:49Z

There is no need to provide anything but get_arch_dma_ops to
<linux/dma-mapping.h>. More the remaining declarations to <asm/iommu.h>
and drop all the includes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/powerpc/include/asm/dma-mapping.h | 29 --------------------------
arch/powerpc/include/asm/iommu.h | 10 +++++++++
arch/powerpc/platforms/44x/ppc476.c | 1 +
3 files changed, 11 insertions(+), 29 deletions(-)

diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index a59c42879194..565d6f74b189 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -1,37 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2004 IBM
- *
- * Implements the generic device dma API for powerpc.
- * the pci and vio busses
*/
#ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H
-#ifdef __KERNEL__
-
-#include <linux/types.h>
-#include <linux/cache.h>
-/* need struct page definitions */
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
-#include <asm/io.h>
-#include <asm/swiotlb.h>
-
-static inline unsigned long device_to_mask(struct device *dev)
-{
- if (dev->dma_mask && *dev->dma_mask)
- return *dev->dma_mask;
- /* Assume devices without mask can take 32 bit addresses */
- return 0xfffffffful;
-}
-
-/*
- * Available generic sets of operations
- */
-#ifdef CONFIG_PPC64
-extern const struct dma_map_ops dma_iommu_ops;
-#endif

static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
@@ -43,5 +15,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
return NULL;
}

-#endif /* __KERNEL__ */
#endif /* _ASM_DMA_MAPPING_H */
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 264d04f1dcd1..db745575e6a4 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -334,5 +334,15 @@ extern bool iommu_fixed_is_weak;
#define iommu_fixed_is_weak false
#endif

+extern const struct dma_map_ops dma_iommu_ops;
+
+static inline unsigned long device_to_mask(struct device *dev)
+{
+ if (dev->dma_mask && *dev->dma_mask)
+ return *dev->dma_mask;
+ /* Assume devices without mask can take 32 bit addresses */
+ return 0xfffffffful;
+}
+
#endif /* __KERNEL__ */
#endif /* _ASM_IOMMU_H */
diff --git a/arch/powerpc/platforms/44x/ppc476.c b/arch/powerpc/platforms/44x/ppc476.c
index e55933f9cd55..a5e61e5c16e2 100644
--- a/arch/powerpc/platforms/44x/ppc476.c
+++ b/arch/powerpc/platforms/44x/ppc476.c
@@ -34,6 +34,7 @@
#include <asm/ppc4xx.h>
#include <asm/mpic.h>
#include <asm/mmu.h>
+#include <asm/swiotlb.h>

#include <linux/pci.h>
#include <linux/i2c.h>
--
2.19.0