xref: /openbmc/linux/arch/alpha/include/asm/pci.h (revision 68198dca)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ALPHA_PCI_H
3 #define __ALPHA_PCI_H
4 
5 #ifdef __KERNEL__
6 
7 #include <linux/spinlock.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/scatterlist.h>
10 #include <asm/machvec.h>
11 
12 /*
13  * The following structure is used to manage multiple PCI busses.
14  */
15 
16 struct pci_iommu_arena;
17 struct page;
18 
19 /* A controller.  Used to manage multiple PCI busses.  */
20 
21 struct pci_controller {
22 	struct pci_controller *next;
23         struct pci_bus *bus;
24 	struct resource *io_space;
25 	struct resource *mem_space;
26 
27 	/* The following are for reporting to userland.  The invariant is
28 	   that if we report a BWX-capable dense memory, we do not report
29 	   a sparse memory at all, even if it exists.  */
30 	unsigned long sparse_mem_base;
31 	unsigned long dense_mem_base;
32 	unsigned long sparse_io_base;
33 	unsigned long dense_io_base;
34 
35 	/* This one's for the kernel only.  It's in KSEG somewhere.  */
36 	unsigned long config_space_base;
37 
38 	unsigned int index;
39 	/* For compatibility with current (as of July 2003) pciutils
40 	   and XFree86. Eventually will be removed. */
41 	unsigned int need_domain_info;
42 
43 	struct pci_iommu_arena *sg_pci;
44 	struct pci_iommu_arena *sg_isa;
45 
46 	void *sysdata;
47 };
48 
49 /* Override the logic in pci_scan_bus for skipping already-configured
50    bus numbers.  */
51 
52 #define pcibios_assign_all_busses()	1
53 
54 #define PCIBIOS_MIN_IO		alpha_mv.min_io_address
55 #define PCIBIOS_MIN_MEM		alpha_mv.min_mem_address
56 
57 /* IOMMU controls.  */
58 
59 /* The PCI address space does not equal the physical memory address space.
60    The networking and block device layers use this boolean for bounce buffer
61    decisions.  */
62 #define PCI_DMA_BUS_IS_PHYS  0
63 
64 /* TODO: integrate with include/asm-generic/pci.h ? */
65 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
66 {
67 	return channel ? 15 : 14;
68 }
69 
70 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
71 
72 static inline int pci_proc_domain(struct pci_bus *bus)
73 {
74 	struct pci_controller *hose = bus->sysdata;
75 	return hose->need_domain_info;
76 }
77 
78 #endif /* __KERNEL__ */
79 
80 /* Values for the `which' argument to sys_pciconfig_iobase.  */
81 #define IOBASE_HOSE		0
82 #define IOBASE_SPARSE_MEM	1
83 #define IOBASE_DENSE_MEM	2
84 #define IOBASE_SPARSE_IO	3
85 #define IOBASE_DENSE_IO		4
86 #define IOBASE_ROOT_BUS		5
87 #define IOBASE_FROM_HOSE	0x10000
88 
89 extern struct pci_dev *isa_bridge;
90 
91 extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
92 			   size_t count);
93 extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
94 			    size_t count);
95 extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
96 				      struct vm_area_struct *vma,
97 				      enum pci_mmap_state mmap_state);
98 extern void pci_adjust_legacy_attr(struct pci_bus *bus,
99 				   enum pci_mmap_state mmap_type);
100 #define HAVE_PCI_LEGACY	1
101 
102 extern int pci_create_resource_files(struct pci_dev *dev);
103 extern void pci_remove_resource_files(struct pci_dev *dev);
104 
105 #endif /* __ALPHA_PCI_H */
106