linux-kernel - [PATCH v2 7/9] mn10300: Provide dummy dma_mmap_coherent() and dma_get

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Message-Id: <1359282808-31398-8-git-send-email-geert@linux-m68k.org>
Date:	Sun, 27 Jan 2013 11:33:26 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	linux-arch@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-am33-list@...hat.com
Subject: [PATCH v2 7/9] mn10300: Provide dummy dma_mmap_coherent() and dma_get_sgtable()

mn10300/allmodconfig:

drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’:
drivers/media/v4l2-core/videobuf2-dma-contig.c:204: error: implicit declaration of function ‘dma_mmap_coherent’
drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_get_base_sgt’:
drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function ‘dma_get_sgtable’

For architectures using dma_map_ops, dma_mmap_coherent() and
dma_get_sgtable() are provided in <asm-generic/dma-mapping-common.h>.

Mn10300 does not use dma_map_ops, hence it should implement them itself.
For now, use dummy implementations that just return -EINVAL, until the API
has been finalized.

Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Marek Szyprowski <m.szyprowski@...sung.com>
Cc: linux-am33-list@...hat.com
---
v2: Dummy implementations that just return -EINVAL
---
 arch/mn10300/include/asm/dma-mapping.h |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/arch/mn10300/include/asm/dma-mapping.h b/arch/mn10300/include/asm/dma-mapping.h
index c1be439..a18abfc 100644
--- a/arch/mn10300/include/asm/dma-mapping.h
+++ b/arch/mn10300/include/asm/dma-mapping.h
@@ -168,4 +168,19 @@ void dma_cache_sync(void *vaddr, size_t size,
 	mn10300_dcache_flush_inv();
 }
 
+/* Not supported for now */
+static inline int dma_mmap_coherent(struct device *dev,
+				    struct vm_area_struct *vma, void *cpu_addr,
+				    dma_addr_t dma_addr, size_t size)
+{
+	return -EINVAL;
+}
+
+static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt,
+				  void *cpu_addr, dma_addr_t dma_addr,
+				  size_t size)
+{
+	return -EINVAL;
+}
+
 #endif
-- 
1.7.0.4

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