diff options
Diffstat (limited to 'kernel/arch/ia64/include/asm/pci.h')
| -rw-r--r-- | kernel/arch/ia64/include/asm/pci.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/kernel/arch/ia64/include/asm/pci.h b/kernel/arch/ia64/include/asm/pci.h new file mode 100644 index 000000000..52af5ed9f --- /dev/null +++ b/kernel/arch/ia64/include/asm/pci.h @@ -0,0 +1,133 @@ +#ifndef _ASM_IA64_PCI_H +#define _ASM_IA64_PCI_H + +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/string.h> +#include <linux/types.h> + +#include <asm/io.h> +#include <asm/scatterlist.h> +#include <asm/hw_irq.h> + +struct pci_vector_struct { + __u16 segment; /* PCI Segment number */ + __u16 bus; /* PCI Bus number */ + __u32 pci_id; /* ACPI split 16 bits device, 16 bits function (see section 6.1.1) */ + __u8 pin; /* PCI PIN (0 = A, 1 = B, 2 = C, 3 = D) */ + __u32 irq; /* IRQ assigned */ +}; + +/* + * Can be used to override the logic in pci_scan_bus for skipping already-configured bus + * numbers - to be used for buggy BIOSes or architectures with incomplete PCI setup by the + * loader. + */ +#define pcibios_assign_all_busses() 0 + +#define PCIBIOS_MIN_IO 0x1000 +#define PCIBIOS_MIN_MEM 0x10000000 + +void pcibios_config_init(void); + +struct pci_dev; + +/* + * PCI_DMA_BUS_IS_PHYS should be set to 1 if there is _necessarily_ a direct + * correspondence between device bus addresses and CPU physical addresses. + * Platforms with a hardware I/O MMU _must_ turn this off to suppress the + * bounce buffer handling code in the block and network device layers. + * Platforms with separate bus address spaces _must_ turn this off and provide + * a device DMA mapping implementation that takes care of the necessary + * address translation. + * + * For now, the ia64 platforms which may have separate/multiple bus address + * spaces all have I/O MMUs which support the merging of physically + * discontiguous buffers, so we can use that as the sole factor to determine + * the setting of PCI_DMA_BUS_IS_PHYS. + */ +extern unsigned long ia64_max_iommu_merge_mask; +#define PCI_DMA_BUS_IS_PHYS (ia64_max_iommu_merge_mask == ~0UL) + +#include <asm-generic/pci-dma-compat.h> + +#ifdef CONFIG_PCI +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_MULTIPLE; + *strategy_parameter = cacheline_size; +} +#endif + +#define HAVE_PCI_MMAP +extern int pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma, + enum pci_mmap_state mmap_state, int write_combine); +#define HAVE_PCI_LEGACY +extern int pci_mmap_legacy_page_range(struct pci_bus *bus, + struct vm_area_struct *vma, + enum pci_mmap_state mmap_state); + +#define pci_get_legacy_mem platform_pci_get_legacy_mem +#define pci_legacy_read platform_pci_legacy_read +#define pci_legacy_write platform_pci_legacy_write + +struct iospace_resource { + struct list_head list; + struct resource res; +}; + +struct pci_controller { + struct acpi_device *companion; + void *iommu; + int segment; + int node; /* nearest node with memory or NUMA_NO_NODE for global allocation */ + + void *platform_data; +}; + + +#define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata) +#define pci_domain_nr(busdev) (PCI_CONTROLLER(busdev)->segment) + +extern struct pci_ops pci_root_ops; + +static inline int pci_proc_domain(struct pci_bus *bus) +{ + return (pci_domain_nr(bus) != 0); +} + +static inline struct resource * +pcibios_select_root(struct pci_dev *pdev, struct resource *res) +{ + struct resource *root = NULL; + + if (res->flags & IORESOURCE_IO) + root = &ioport_resource; + if (res->flags & IORESOURCE_MEM) + root = &iomem_resource; + + return root; +} + +#define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ +static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) +{ + return channel ? isa_irq_to_vector(15) : isa_irq_to_vector(14); +} + +#ifdef CONFIG_INTEL_IOMMU +extern void pci_iommu_alloc(void); +#endif +#endif /* _ASM_IA64_PCI_H */ |