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Date: Mon, 11 May 2009 16:59:52 -0700
From: Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
To: <microblaze-uclinux@...e.uq.edu.au>,
"Michal Simek" <monstr@...str.eu>
CC: <linux-kernel@...r.kernel.org>
Subject: RE: [microblaze-uclinux] [PATCH 12/12] microblaze: use generic dma-mapping-broken.h
Gah... considering the ll_temac needs this, it should get implemented
ASAP...
(Yeah, I know... just not enough hours in the day.)
Steve
> -----Original Message-----
> From: owner-microblaze-uclinux@...ts.itee.uq.edu.au
[mailto:owner-microblaze-
> uclinux@...ts.itee.uq.edu.au] On Behalf Of Arnd Bergmann
> Sent: Monday, May 11, 2009 4:21 PM
> To: Michal Simek
> Cc: linux-kernel@...r.kernel.org; microblaze-uclinux@...e.uq.edu.au
> Subject: [microblaze-uclinux] [PATCH 12/12] microblaze: use generic
dma-mapping-broken.h
>
> Microblaze does not support the Linux DMA mapping API
> at this point, so disable CONFIG_NO_DMA. This lets
> us use the generic dma-mapping-broken.h implementation
> instead of providing a different copy.
>
> Any drivers that try to use DMA mapping now get
> omitted from Kconfig or produce a link error, rather
> than failing silently at run time.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> arch/microblaze/Kconfig | 2 +-
> arch/microblaze/include/asm/dma-mapping.h | 130
+----------------------------
> 2 files changed, 2 insertions(+), 130 deletions(-)
> rewrite arch/microblaze/include/asm/dma-mapping.h (100%)
>
> diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
> index 8cc312b..0d837ee 100644
> --- a/arch/microblaze/Kconfig
> +++ b/arch/microblaze/Kconfig
> @@ -55,7 +55,7 @@ config PCI
>
> config NO_DMA
> depends on !MMU
> - def_bool n
> + def_bool y
>
> source "init/Kconfig"
>
> diff --git a/arch/microblaze/include/asm/dma-mapping.h
b/arch/microblaze/include/asm/dma-mapping.h
> dissimilarity index 100%
> index 1733625..d00e400 100644
> --- a/arch/microblaze/include/asm/dma-mapping.h
> +++ b/arch/microblaze/include/asm/dma-mapping.h
> @@ -1,129 +1 @@
> -/*
> - * Copyright (C) 2006 Atmark Techno, Inc.
> - *
> - * This file is subject to the terms and conditions of the GNU
General Public
> - * License. See the file "COPYING" in the main directory of this
archive
> - * for more details.
> - */
> -
> -#ifndef _ASM_MICROBLAZE_DMA_MAPPING_H
> -#define _ASM_MICROBLAZE_DMA_MAPPING_H
> -
> -#include <asm/cacheflush.h>
> -#include <linux/io.h>
> -#include <linux/bug.h>
> -
> -struct scatterlist;
> -
> -#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h,
f)
> -#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v,
h)
> -
> -/* FIXME */
> -static inline int
> -dma_supported(struct device *dev, u64 mask)
> -{
> - return 1;
> -}
> -
> -static inline dma_addr_t
> -dma_map_page(struct device *dev, struct page *page,
> - unsigned long offset, size_t size,
> - enum dma_data_direction direction)
> -{
> - BUG();
> - return 0;
> -}
> -
> -static inline void
> -dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t
size,
> - enum dma_data_direction direction)
> -{
> - BUG();
> -}
> -
> -static inline int
> -dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
> - enum dma_data_direction direction)
> -{
> - BUG();
> - return 0;
> -}
> -
> -static inline void
> -dma_unmap_sg(struct device *dev, struct scatterlist *sg, int
nhwentries,
> - enum dma_data_direction direction)
> -{
> - BUG();
> -}
> -
> -static inline void
> -dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size,
> - enum dma_data_direction direction)
> -{
> - BUG();
> -}
> -
> -static inline void
> -dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
> - size_t size, enum dma_data_direction direction)
> -{
> - BUG();
> -}
> -
> -static inline void
> -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int
nelems,
> - enum dma_data_direction direction)
> -{
> - BUG();
> -}
> -
> -static inline void
> -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int nelems,
> - enum dma_data_direction direction)
> -{
> - BUG();
> -}
> -
> -static inline int dma_mapping_error(struct device *dev, dma_addr_t
dma_addr)
> -{
> - return 0;
> -}
> -
> -static inline void *dma_alloc_coherent(struct device *dev, size_t
size,
> - dma_addr_t *dma_handle, int flag)
> -{
> - return NULL; /* consistent_alloc(flag, size, dma_handle); */
> -}
> -
> -static inline void dma_free_coherent(struct device *dev, size_t size,
> - void *vaddr, dma_addr_t dma_handle)
> -{
> - BUG();
> -}
> -
> -static inline dma_addr_t
> -dma_map_single(struct device *dev, void *ptr, size_t size,
> - enum dma_data_direction direction)
> -{
> - BUG_ON(direction == DMA_NONE);
> -
> - return virt_to_bus(ptr);
> -}
> -
> -static inline void dma_unmap_single(struct device *dev, dma_addr_t
dma_addr,
> - size_t size,
> - enum dma_data_direction direction)
> -{
> - switch (direction) {
> - case DMA_FROM_DEVICE:
> - flush_dcache_range((unsigned)dma_addr,
> - (unsigned)dma_addr + size);
> - /* Fall through */
> - case DMA_TO_DEVICE:
> - break;
> - default:
> - BUG();
> - }
> -}
> -
> -#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */
> +#include <asm-generic/dma-mapping-broken.h>
> --
> 1.6.0.4
>
> --
>
> ___________________________
> microblaze-uclinux mailing list
> microblaze-uclinux@...e.uq.edu.au
> Project Home Page :
http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
> Mailing List Archive :
http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>
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