1#ifndef _ASM_IA64_PCI_H
  2#define _ASM_IA64_PCI_H
  3
  4#include <linux/mm.h>
  5#include <linux/slab.h>
  6#include <linux/spinlock.h>
  7#include <linux/string.h>
  8#include <linux/types.h>
  9
 10#include <asm/io.h>
 11#include <asm/scatterlist.h>
 12#include <asm/hw_irq.h>
 13
 14struct pci_vector_struct {
 15	__u16 segment;	/* PCI Segment number */
 16	__u16 bus;	/* PCI Bus number */
 17	__u32 pci_id;	/* ACPI split 16 bits device, 16 bits function (see section 6.1.1) */
 18	__u8 pin;	/* PCI PIN (0 = A, 1 = B, 2 = C, 3 = D) */
 19	__u32 irq;	/* IRQ assigned */
 20};
 21
 22/*
 23 * Can be used to override the logic in pci_scan_bus for skipping already-configured bus
 24 * numbers - to be used for buggy BIOSes or architectures with incomplete PCI setup by the
 25 * loader.
 26 */
 27#define pcibios_assign_all_busses()     0
 28
 29#define PCIBIOS_MIN_IO		0x1000
 30#define PCIBIOS_MIN_MEM		0x10000000
 31
 32void pcibios_config_init(void);
 33
 34struct pci_dev;
 35
 36/*
 37 * PCI_DMA_BUS_IS_PHYS should be set to 1 if there is _necessarily_ a direct
 38 * correspondence between device bus addresses and CPU physical addresses.
 39 * Platforms with a hardware I/O MMU _must_ turn this off to suppress the
 40 * bounce buffer handling code in the block and network device layers.
 41 * Platforms with separate bus address spaces _must_ turn this off and provide
 42 * a device DMA mapping implementation that takes care of the necessary
 43 * address translation.
 44 *
 45 * For now, the ia64 platforms which may have separate/multiple bus address
 46 * spaces all have I/O MMUs which support the merging of physically
 47 * discontiguous buffers, so we can use that as the sole factor to determine
 48 * the setting of PCI_DMA_BUS_IS_PHYS.
 49 */
 50extern unsigned long ia64_max_iommu_merge_mask;
 51#define PCI_DMA_BUS_IS_PHYS	(ia64_max_iommu_merge_mask == ~0UL)
 52
 53static inline void
 54pcibios_penalize_isa_irq (int irq, int active)
 55{
 56	/* We don't do dynamic PCI IRQ allocation */
 57}
 58
 59#include <asm-generic/pci-dma-compat.h>
 60
 61#ifdef CONFIG_PCI
 62static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 63					enum pci_dma_burst_strategy *strat,
 64					unsigned long *strategy_parameter)
 65{
 66	unsigned long cacheline_size;
 67	u8 byte;
 68
 69	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
 70	if (byte == 0)
 71		cacheline_size = 1024;
 72	else
 73		cacheline_size = (int) byte * 4;
 74
 75	*strat = PCI_DMA_BURST_MULTIPLE;
 76	*strategy_parameter = cacheline_size;
 77}
 78#endif
 79
 80#define HAVE_PCI_MMAP
 81extern int pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma,
 82				enum pci_mmap_state mmap_state, int write_combine);
 83#define HAVE_PCI_LEGACY
 84extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
 85				      struct vm_area_struct *vma,
 86				      enum pci_mmap_state mmap_state);
 87
 88#define pci_get_legacy_mem platform_pci_get_legacy_mem
 89#define pci_legacy_read platform_pci_legacy_read
 90#define pci_legacy_write platform_pci_legacy_write
 91
 92struct iospace_resource {
 93	struct list_head list;
 94	struct resource res;
 95};
 96
 97struct pci_controller {
 98	struct acpi_device *companion;
 99	void *iommu;
100	int segment;
101	int node;		/* nearest node with memory or NUMA_NO_NODE for global allocation */
102
103	void *platform_data;
104};
105
106
107#define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata)
108#define pci_domain_nr(busdev)    (PCI_CONTROLLER(busdev)->segment)
109
110extern struct pci_ops pci_root_ops;
111
112static inline int pci_proc_domain(struct pci_bus *bus)
113{
114	return (pci_domain_nr(bus) != 0);
115}
116
117static inline struct resource *
118pcibios_select_root(struct pci_dev *pdev, struct resource *res)
119{
120	struct resource *root = NULL;
121
122	if (res->flags & IORESOURCE_IO)
123		root = &ioport_resource;
124	if (res->flags & IORESOURCE_MEM)
125		root = &iomem_resource;
126
127	return root;
128}
129
130#define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
131static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
132{
133	return channel ? isa_irq_to_vector(15) : isa_irq_to_vector(14);
134}
135
136#ifdef CONFIG_INTEL_IOMMU
137extern void pci_iommu_alloc(void);
138#endif
139#endif /* _ASM_IA64_PCI_H */