xref: /openbmc/linux/arch/alpha/include/asm/pci.h (revision 4800cd83)
1 #ifndef __ALPHA_PCI_H
2 #define __ALPHA_PCI_H
3 
4 #ifdef __KERNEL__
5 
6 #include <linux/spinlock.h>
7 #include <linux/dma-mapping.h>
8 #include <asm/scatterlist.h>
9 #include <asm/machvec.h>
10 
11 /*
12  * The following structure is used to manage multiple PCI busses.
13  */
14 
15 struct pci_dev;
16 struct pci_bus;
17 struct resource;
18 struct pci_iommu_arena;
19 struct page;
20 
21 /* A controller.  Used to manage multiple PCI busses.  */
22 
23 struct pci_controller {
24 	struct pci_controller *next;
25         struct pci_bus *bus;
26 	struct resource *io_space;
27 	struct resource *mem_space;
28 
29 	/* The following are for reporting to userland.  The invariant is
30 	   that if we report a BWX-capable dense memory, we do not report
31 	   a sparse memory at all, even if it exists.  */
32 	unsigned long sparse_mem_base;
33 	unsigned long dense_mem_base;
34 	unsigned long sparse_io_base;
35 	unsigned long dense_io_base;
36 
37 	/* This one's for the kernel only.  It's in KSEG somewhere.  */
38 	unsigned long config_space_base;
39 
40 	unsigned int index;
41 	/* For compatibility with current (as of July 2003) pciutils
42 	   and XFree86. Eventually will be removed. */
43 	unsigned int need_domain_info;
44 
45 	struct pci_iommu_arena *sg_pci;
46 	struct pci_iommu_arena *sg_isa;
47 
48 	void *sysdata;
49 };
50 
51 /* Override the logic in pci_scan_bus for skipping already-configured
52    bus numbers.  */
53 
54 #define pcibios_assign_all_busses()	1
55 
56 #define PCIBIOS_MIN_IO		alpha_mv.min_io_address
57 #define PCIBIOS_MIN_MEM		alpha_mv.min_mem_address
58 
59 extern void pcibios_set_master(struct pci_dev *dev);
60 
61 extern inline void pcibios_penalize_isa_irq(int irq, int active)
62 {
63 	/* We don't do dynamic PCI IRQ allocation */
64 }
65 
66 /* IOMMU controls.  */
67 
68 /* The PCI address space does not equal the physical memory address space.
69    The networking and block device layers use this boolean for bounce buffer
70    decisions.  */
71 #define PCI_DMA_BUS_IS_PHYS  0
72 
73 #ifdef CONFIG_PCI
74 
75 /* implement the pci_ DMA API in terms of the generic device dma_ one */
76 #include <asm-generic/pci-dma-compat.h>
77 
78 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
79 					enum pci_dma_burst_strategy *strat,
80 					unsigned long *strategy_parameter)
81 {
82 	unsigned long cacheline_size;
83 	u8 byte;
84 
85 	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
86 	if (byte == 0)
87 		cacheline_size = 1024;
88 	else
89 		cacheline_size = (int) byte * 4;
90 
91 	*strat = PCI_DMA_BURST_BOUNDARY;
92 	*strategy_parameter = cacheline_size;
93 }
94 #endif
95 
96 /* TODO: integrate with include/asm-generic/pci.h ? */
97 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
98 {
99 	return channel ? 15 : 14;
100 }
101 
102 extern void pcibios_resource_to_bus(struct pci_dev *, struct pci_bus_region *,
103 				    struct resource *);
104 
105 extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
106 				    struct pci_bus_region *region);
107 
108 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
109 
110 static inline int pci_proc_domain(struct pci_bus *bus)
111 {
112 	struct pci_controller *hose = bus->sysdata;
113 	return hose->need_domain_info;
114 }
115 
116 #endif /* __KERNEL__ */
117 
118 /* Values for the `which' argument to sys_pciconfig_iobase.  */
119 #define IOBASE_HOSE		0
120 #define IOBASE_SPARSE_MEM	1
121 #define IOBASE_DENSE_MEM	2
122 #define IOBASE_SPARSE_IO	3
123 #define IOBASE_DENSE_IO		4
124 #define IOBASE_ROOT_BUS		5
125 #define IOBASE_FROM_HOSE	0x10000
126 
127 extern struct pci_dev *isa_bridge;
128 
129 extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
130 			   size_t count);
131 extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
132 			    size_t count);
133 extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
134 				      struct vm_area_struct *vma,
135 				      enum pci_mmap_state mmap_state);
136 extern void pci_adjust_legacy_attr(struct pci_bus *bus,
137 				   enum pci_mmap_state mmap_type);
138 #define HAVE_PCI_LEGACY	1
139 
140 extern int pci_create_resource_files(struct pci_dev *dev);
141 extern void pci_remove_resource_files(struct pci_dev *dev);
142 
143 #endif /* __ALPHA_PCI_H */
144