diff options
Diffstat (limited to 'arch/sh/include/asm/pci.h')
| -rw-r--r-- | arch/sh/include/asm/pci.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h index 5b2e0fcdfc2..ae0da6f48b6 100644 --- a/arch/sh/include/asm/pci.h +++ b/arch/sh/include/asm/pci.h @@ -89,12 +89,28 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) #endif #ifdef CONFIG_PCI +/* + * None of the SH PCI controllers support MWI, it is always treated as a + * direct memory write. + */ +#define PCI_DISABLE_MWI + static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, unsigned long *strategy_parameter) { - *strat = PCI_DMA_BURST_INFINITY; - *strategy_parameter = ~0UL; + unsigned long cacheline_size; + u8 byte; + + pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte); + + if (byte == 0) + cacheline_size = L1_CACHE_BYTES; + else + cacheline_size = byte << 2; + + *strat = PCI_DMA_BURST_MULTIPLE; + *strategy_parameter = cacheline_size; } #endif |