aboutsummaryrefslogtreecommitdiff
path: root/arch/ia64/include/asm/pci.h
blob: b22e5f5fa5939ea0ab41ba929b7bfddf0d9c122e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
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>

/*
 * 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)

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

#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 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 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 */