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dma-mapping: provide a generic asm/dma-mapping.h

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For architectures that just use the generic dma_noop_ops we can provide
a generic version of dma-mapping.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2017-12-23 10:56:51 +01:00
parent cea9d03c82
commit c5cd037d1c
8 changed files with 14 additions and 64 deletions
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1
MAINTAINERS
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@ -4338,6 +4338,7 @@ F: lib/dma-noop.c
F: lib/dma-virt.c
F: drivers/base/dma-mapping.c
F: drivers/base/dma-coherent.c
F: include/asm-generic/dma-mapping.h
F: include/linux/dma-direct.h
F: include/linux/dma-mapping.h

1
arch/m32r/include/asm/Kbuild
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@ -1,5 +1,6 @@
generic-y += clkdev.h
generic-y += current.h
generic-y += dma-mapping.h
generic-y += exec.h
generic-y += extable.h
generic-y += irq_work.h

17
arch/m32r/include/asm/dma-mapping.h
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@ -1,17 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_M32R_DMA_MAPPING_H
#define _ASM_M32R_DMA_MAPPING_H
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <linux/io.h>
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
return &dma_noop_ops;
}
#endif /* _ASM_M32R_DMA_MAPPING_H */

1
arch/riscv/include/asm/Kbuild
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@ -7,6 +7,7 @@ generic-y += device.h
generic-y += div64.h
generic-y += dma.h
generic-y += dma-contiguous.h
generic-y += dma-mapping.h
generic-y += emergency-restart.h
generic-y += errno.h
generic-y += exec.h

30
arch/riscv/include/asm/dma-mapping.h
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@ -1,30 +0,0 @@
/*
* Copyright (C) 2003-2004 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
* Copyright (C) 2012 ARM Ltd.
* Copyright (C) 2016 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_RISCV_DMA_MAPPING_H
#define __ASM_RISCV_DMA_MAPPING_H
/* Use ops->dma_mapping_error (if it exists) or assume success */
// #undef DMA_ERROR_CODE
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
return &dma_noop_ops;
}
#endif /* __ASM_RISCV_DMA_MAPPING_H */

1
arch/s390/include/asm/Kbuild
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@ -4,6 +4,7 @@ generic-y += cacheflush.h
generic-y += clkdev.h
generic-y += device.h
generic-y += dma-contiguous.h
generic-y += dma-mapping.h
generic-y += div64.h
generic-y += emergency-restart.h
generic-y += export.h

17
arch/s390/include/asm/dma-mapping.h
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@ -1,17 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_DMA_MAPPING_H
#define _ASM_S390_DMA_MAPPING_H
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <linux/io.h>
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
return &dma_noop_ops;
}
#endif /* _ASM_S390_DMA_MAPPING_H */

10
include/asm-generic/dma-mapping.h Normal file
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@ -0,0 +1,10 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_DMA_MAPPING_H
#define _ASM_GENERIC_DMA_MAPPING_H
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
return &dma_noop_ops;
}
#endif /* _ASM_GENERIC_DMA_MAPPING_H */