From 35063bb2eaf85bd0f6e3acefae2d95cb0120eb3e Mon Sep 17 00:00:00 2001 From: Geoff Levand Date: Tue, 30 Jan 2007 15:20:34 -0800 Subject: [PATCH] [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 Acked-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/ps3/system-bus.c | 23 +++++++++++++++++++++-- 1 file 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 = { -- 2.20.1