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| author | Geoff Levand <geoffrey.levand@am.sony.com> | 2007-01-30 15:20:34 -0800 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-02-07 14:03:20 +1100 |
| commit | 35063bb2eaf85bd0f6e3acefae2d95cb0120eb3e (patch) | |
| tree | 70fcfad56c58b0489430afb81a17df8b9f35bec0 /arch/powerpc/platforms/ps3/system-bus.c | |
| parent | 97ec1675999eae96975a30facbedc2e6c0c832bc (diff) | |
| download | blackbird-op-linux-35063bb2eaf85bd0f6e3acefae2d95cb0120eb3e.tar.gz blackbird-op-linux-35063bb2eaf85bd0f6e3acefae2d95cb0120eb3e.zip | |
[POWERPC] PS3: Fix DMA scatter-gather
Add the missing pieces to support DMA scatter-gather on the PS3 system bus.
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/ps3/system-bus.c')
| -rw-r--r-- | arch/powerpc/platforms/ps3/system-bus.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/ps3/system-bus.c b/arch/powerpc/platforms/ps3/system-bus.c index 9f2c6a909e4d..bce6136cbce7 100644 --- a/arch/powerpc/platforms/ps3/system-bus.c +++ b/arch/powerpc/platforms/ps3/system-bus.c @@ -272,10 +272,29 @@ static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr, static int ps3_map_sg(struct device *_dev, struct scatterlist *sg, int nents, enum dma_data_direction direction) { + struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev); + int i; + #if defined(CONFIG_PS3_DYNAMIC_DMA) BUG_ON("do"); + return -EPERM; +#else + for (i = 0; i < nents; i++, sg++) { + int result = ps3_dma_map(dev->d_region, + page_to_phys(sg->page) + sg->offset, sg->length, + &sg->dma_address); + + if (result) { + pr_debug("%s:%d: ps3_dma_map failed (%d)\n", + __func__, __LINE__, result); + return -EINVAL; + } + + sg->dma_length = sg->length; + } + + return nents; #endif - return 0; } static void ps3_unmap_sg(struct device *_dev, struct scatterlist *sg, @@ -288,7 +307,7 @@ static void ps3_unmap_sg(struct device *_dev, struct scatterlist *sg, static int ps3_dma_supported(struct device *_dev, u64 mask) { - return 1; + return mask >= DMA_32BIT_MASK; } static struct dma_mapping_ops ps3_dma_ops = { |
