source: trunk/packages/xen-common/xen-common/xen/include/asm-ia64/linux-xen/asm/pci.h @ 34

#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>
#ifdef XEN
#include <linux/ioport.h>
#endif

#include <asm/io.h>
#ifndef XEN
#include <asm/scatterlist.h>
#endif

/*
 * 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_scan_all_fns(a, b)      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)

static inline void
pcibios_set_master (struct pci_dev *dev)
{
        /* No special bus mastering setup handling */
}

static inline void
pcibios_penalize_isa_irq (int irq, int active)
{
        /* We don't do dynamic PCI IRQ allocation */
}

#define HAVE_ARCH_PCI_MWI 1
extern int pcibios_prep_mwi (struct pci_dev *);

#ifndef XEN
#include <asm-generic/pci-dma-compat.h>
#endif

/* pci_unmap_{single,page} is not a nop, thus... */
#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))

/* The ia64 platform always supports 64-bit addressing. */
#define pci_dac_dma_supported(pci_dev, mask)            (1)
#define pci_dac_page_to_dma(dev,pg,off,dir)             ((dma_addr_t) page_to_bus(pg) + (off))
#define pci_dac_dma_to_page(dev,dma_addr)               (virt_to_page(bus_to_virt(dma_addr)))
#define pci_dac_dma_to_offset(dev,dma_addr)             offset_in_page(dma_addr)
#define pci_dac_dma_sync_single_for_cpu(dev,dma_addr,len,dir)   do { } while (0)
#define pci_dac_dma_sync_single_for_device(dev,dma_addr,len,dir)        do { mb(); } while (0)

#define sg_dma_len(sg)          ((sg)->dma_length)
#define sg_dma_address(sg)      ((sg)->dma_address)

#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);
#ifndef XEN
extern ssize_t pci_read_legacy_io(struct kobject *kobj, char *buf, loff_t off,
                                  size_t count);
extern ssize_t pci_write_legacy_io(struct kobject *kobj, char *buf, loff_t off,
                                   size_t count);
extern int pci_mmap_legacy_mem(struct kobject *kobj,
                               struct bin_attribute *attr,
                               struct vm_area_struct *vma);
#endif

#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 pci_window {
        struct resource resource;
        u64 offset;
};

struct pci_controller {
        void *acpi_handle;
        void *iommu;
        int segment;
        int node;               /* nearest node with memory or -1 for global allocation */

        unsigned int windows;
        struct pci_window *window;

        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 void pcibios_add_platform_entries(struct pci_dev *dev)
{
}

extern void pcibios_resource_to_bus(struct pci_dev *dev,
                struct pci_bus_region *region, struct resource *res);

extern void pcibios_bus_to_resource(struct pci_dev *dev,
                struct resource *res, struct pci_bus_region *region);

#ifndef XEN
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;
}
#endif

#define pcibios_scan_all_fns(a, b)      0

#endif /* _ASM_IA64_PCI_H */