diff options
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/Kconfig | 7 | ||||
| -rw-r--r-- | arch/sh/drivers/pci/Kconfig | 12 | ||||
| -rw-r--r-- | arch/sh/include/asm/pci.h | 20 | ||||
| -rw-r--r-- | arch/sh/kernel/dma-nommu.c | 4 |
4 files changed, 18 insertions, 25 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 2d3a6999385..e5ee3b159e5 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -169,6 +169,12 @@ config ARCH_HAS_CPU_IDLE_WAIT config IO_TRAPPED bool +config DMA_COHERENT + bool + +config DMA_NONCOHERENT + def_bool !DMA_COHERENT + source "init/Kconfig" source "kernel/Kconfig.freezer" @@ -217,6 +223,7 @@ config CPU_SHX2 config CPU_SHX3 bool + select DMA_COHERENT config ARCH_SHMOBILE bool diff --git a/arch/sh/drivers/pci/Kconfig b/arch/sh/drivers/pci/Kconfig index e8db585a663..78a3ce1e6c4 100644 --- a/arch/sh/drivers/pci/Kconfig +++ b/arch/sh/drivers/pci/Kconfig @@ -5,15 +5,3 @@ config PCI Find out whether you have a PCI motherboard. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. If you have PCI, say Y, otherwise N. - -config SH_PCIDMA_NONCOHERENT - bool "Cache and PCI noncoherent" - depends on PCI - default y - help - Enable this option if your platform does not have a CPU cache which - remains coherent with PCI DMA. It is safest to say 'Y', although you - will see better performance if you can say 'N', because the PCI DMA - code will not have to flush the CPU's caches. If you have a PCI host - bridge integrated with your SH CPU, refer carefully to the chip specs - to see if you can say 'N' here. Otherwise, leave it as 'Y'. diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h index 6bf276b4f85..67f3999b544 100644 --- a/arch/sh/include/asm/pci.h +++ b/arch/sh/include/asm/pci.h @@ -57,19 +57,13 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) /* pci_unmap_{single,page} being a nop depends upon the * configuration. */ -#ifdef CONFIG_SH_PCIDMA_NONCOHERENT -#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ - dma_addr_t ADDR_NAME; -#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \ - __u32 LEN_NAME; -#define pci_unmap_addr(PTR, ADDR_NAME) \ - ((PTR)->ADDR_NAME) -#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \ - (((PTR)->ADDR_NAME) = (VAL)) -#define pci_unmap_len(PTR, LEN_NAME) \ - ((PTR)->LEN_NAME) -#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ - (((PTR)->LEN_NAME) = (VAL)) +#ifdef CONFIG_DMA_NONCOHERENT +#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME; +#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME; +#define pci_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME) +#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL)) +#define pci_unmap_len(PTR, LEN_NAME) ((PTR)->LEN_NAME) +#define pci_unmap_len_set(PTR, LEN_NAME, VAL) (((PTR)->LEN_NAME) = (VAL)) #else #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) diff --git a/arch/sh/kernel/dma-nommu.c b/arch/sh/kernel/dma-nommu.c index b336fcf40f1..3c55b87f8b6 100644 --- a/arch/sh/kernel/dma-nommu.c +++ b/arch/sh/kernel/dma-nommu.c @@ -44,6 +44,7 @@ static int nommu_map_sg(struct device *dev, struct scatterlist *sg, return nents; } +#ifdef CONFIG_DMA_NONCOHERENT static void nommu_sync_single(struct device *dev, dma_addr_t addr, size_t size, enum dma_data_direction dir) { @@ -59,14 +60,17 @@ static void nommu_sync_sg(struct device *dev, struct scatterlist *sg, for_each_sg(sg, s, nelems, i) dma_cache_sync(dev, sg_virt(s), s->length, dir); } +#endif struct dma_map_ops nommu_dma_ops = { .alloc_coherent = dma_generic_alloc_coherent, .free_coherent = dma_generic_free_coherent, .map_page = nommu_map_page, .map_sg = nommu_map_sg, +#ifdef CONFIG_DMA_NONCOHERENT .sync_single_for_device = nommu_sync_single, .sync_sg_for_device = nommu_sync_sg, +#endif .is_phys = 1, }; |