[PATCH] ARM: dma-mapping: highbank: Restrict DMA to 32-bit addresses
Some devices on Calxeda ECX-2000 are restricted to 32-bit DMA. Thus the platform needs to set dma_zone_size, otherwise dma-mapping code is complaining, e.g. calxedaxgmac fff5.ethernet: coherent DMA mask 0x is smaller than system GFP_DMA mask 0x Same is true for sata_highbank. For the latter dma_coherent_mask could be increased but due to the lack of DMA32 zone we need to adapt arm_dma_limit in general. Signed-off-by: Andreas Herrmann --- arch/arm/mach-highbank/Kconfig|1 + arch/arm/mach-highbank/highbank.c |3 +++ arch/arm/mm/dma-mapping.c |4 3 files changed, 8 insertions(+) diff --git a/arch/arm/mach-highbank/Kconfig b/arch/arm/mach-highbank/Kconfig index cd9fcb1..efe4961 100644 --- a/arch/arm/mach-highbank/Kconfig +++ b/arch/arm/mach-highbank/Kconfig @@ -18,3 +18,4 @@ config ARCH_HIGHBANK select PL320_MBOX select SPARSE_IRQ select USE_OF + select ZONE_DMA if ARM_LPAE diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c index 8881579..31b26de 100644 --- a/arch/arm/mach-highbank/highbank.c +++ b/arch/arm/mach-highbank/highbank.c @@ -176,6 +176,9 @@ static const char *highbank_match[] __initconst = { }; DT_MACHINE_START(HIGHBANK, "Highbank") +#ifdef CONFIG_ZONE_DMA + .dma_zone_size = DMA_BIT_MASK(32), +#endif .smp= smp_ops(highbank_smp_ops), .init_irq = highbank_init_irq, .init_time = highbank_timer_init, diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 7f9b179..f404dfc 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -651,7 +651,11 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, if (!mask) return NULL; +#ifdef CONFIG_ARM_LPAE + if (mask <= 0xULL) +#else if (mask < 0xULL) +#endif gfp |= GFP_DMA; /* -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH] ARM: dma-mapping: highbank: Restrict DMA to 32-bit addresses
On Thu, Aug 01, 2013 at 10:40:47PM +0200, Andreas Herrmann wrote: > > Some devices on Calxeda ECX-2000 are restricted to 32-bit DMA. Thus > the platform needs to set dma_zone_size, otherwise dma-mapping code is > complaining, e.g. > > calxedaxgmac fff5.ethernet: coherent DMA mask 0x is smaller > than system > GFP_DMA mask 0x > > Same is true for sata_highbank. For the latter dma_coherent_mask could > be increased but due to the lack of DMA32 zone we need to adapt > arm_dma_limit in general. Please wait until I post my dma mask patches. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH] ARM: dma-mapping: highbank: Restrict DMA to 32-bit addresses
On Thu, Aug 01, 2013 at 10:40:47PM +0200, Andreas Herrmann wrote: Some devices on Calxeda ECX-2000 are restricted to 32-bit DMA. Thus the platform needs to set dma_zone_size, otherwise dma-mapping code is complaining, e.g. calxedaxgmac fff5.ethernet: coherent DMA mask 0x is smaller than system GFP_DMA mask 0x Same is true for sata_highbank. For the latter dma_coherent_mask could be increased but due to the lack of DMA32 zone we need to adapt arm_dma_limit in general. Please wait until I post my dma mask patches. Thanks. -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH] ARM: dma-mapping: highbank: Restrict DMA to 32-bit addresses
Some devices on Calxeda ECX-2000 are restricted to 32-bit DMA. Thus the platform needs to set dma_zone_size, otherwise dma-mapping code is complaining, e.g. calxedaxgmac fff5.ethernet: coherent DMA mask 0x is smaller than system GFP_DMA mask 0x Same is true for sata_highbank. For the latter dma_coherent_mask could be increased but due to the lack of DMA32 zone we need to adapt arm_dma_limit in general. Signed-off-by: Andreas Herrmann andreas.herrm...@calxeda.com --- arch/arm/mach-highbank/Kconfig|1 + arch/arm/mach-highbank/highbank.c |3 +++ arch/arm/mm/dma-mapping.c |4 3 files changed, 8 insertions(+) diff --git a/arch/arm/mach-highbank/Kconfig b/arch/arm/mach-highbank/Kconfig index cd9fcb1..efe4961 100644 --- a/arch/arm/mach-highbank/Kconfig +++ b/arch/arm/mach-highbank/Kconfig @@ -18,3 +18,4 @@ config ARCH_HIGHBANK select PL320_MBOX select SPARSE_IRQ select USE_OF + select ZONE_DMA if ARM_LPAE diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c index 8881579..31b26de 100644 --- a/arch/arm/mach-highbank/highbank.c +++ b/arch/arm/mach-highbank/highbank.c @@ -176,6 +176,9 @@ static const char *highbank_match[] __initconst = { }; DT_MACHINE_START(HIGHBANK, Highbank) +#ifdef CONFIG_ZONE_DMA + .dma_zone_size = DMA_BIT_MASK(32), +#endif .smp= smp_ops(highbank_smp_ops), .init_irq = highbank_init_irq, .init_time = highbank_timer_init, diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 7f9b179..f404dfc 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -651,7 +651,11 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, if (!mask) return NULL; +#ifdef CONFIG_ARM_LPAE + if (mask = 0xULL) +#else if (mask 0xULL) +#endif gfp |= GFP_DMA; /* -- 1.7.9.5 -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/