[PATCH] PCI: DMA bursting advice

[linux-2.6-omap-h63xx.git] / include / asm-sparc64 / pci.h

diff --git a/include/asm-sparc64/pci.h b/include/asm-sparc64/pci.h
index 2a0c85cd1c11de63ba0bb21ddb4424445e9f8722..402667300d01a060df7dd9956131273379c429e1 100644 (file)
--- a/include/asm-sparc64/pci.h
+++ b/include/asm-sparc64/pci.h
@@ -220,6 +220,23 @@ static inline int pci_dma_mapping_error(dma_addr_t dma_addr)
        return (dma_addr == PCI_DMA_ERROR_CODE);
 }
 
+static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+                                       enum pci_dma_burst_strategy *strat,
+                                       unsigned long *strategy_parameter)
+{
+       unsigned long cacheline_size;
+       u8 byte;
+
+       pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
+       if (byte == 0)
+               cacheline_size = 1024;
+       else
+               cacheline_size = (int) byte * 4;
+
+       *strat = PCI_DMA_BURST_BOUNDARY;
+       *strategy_parameter = cacheline_size;
+}
+
 /* Return the index of the PCI controller for device PDEV. */
 
 extern int pci_domain_nr(struct pci_bus *bus);