1 #ifndef __ASM_POWERPC_PCI_H
2 #define __ASM_POWERPC_PCI_H
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #include <linux/types.h>
13 #include <linux/slab.h>
14 #include <linux/string.h>
15 #include <linux/dma-mapping.h>
17 #include <asm/machdep.h>
18 #include <asm/scatterlist.h>
21 #include <asm/pci-bridge.h>
23 #include <asm-generic/pci-dma-compat.h>
25 #define PCIBIOS_MIN_IO 0x1000
26 #define PCIBIOS_MIN_MEM 0x10000000
30 /* Values for the `which' argument to sys_pciconfig_iobase syscall. */
31 #define IOBASE_BRIDGE_NUMBER 0
32 #define IOBASE_MEMORY 1
34 #define IOBASE_ISA_IO 3
35 #define IOBASE_ISA_MEM 4
38 * Set this to 1 if you want the kernel to re-assign all PCI
39 * bus numbers (don't do that on ppc64 yet !)
41 #define pcibios_assign_all_busses() (ppc_pci_flags & \
42 PPC_PCI_REASSIGN_ALL_BUS)
43 #define pcibios_scan_all_fns(a, b) 0
45 static inline void pcibios_set_master(struct pci_dev *dev)
47 /* No special bus mastering setup handling */
50 static inline void pcibios_penalize_isa_irq(int irq, int active)
52 /* We don't do dynamic PCI IRQ allocation */
55 #define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
56 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
58 if (ppc_md.pci_get_legacy_ide_irq)
59 return ppc_md.pci_get_legacy_ide_irq(dev, channel);
60 return channel ? 15 : 14;
64 extern void set_pci_dma_ops(struct dma_mapping_ops *dma_ops);
65 extern struct dma_mapping_ops *get_pci_dma_ops(void);
66 #else /* CONFIG_PCI */
67 #define set_pci_dma_ops(d)
68 #define get_pci_dma_ops() NULL
74 * We want to avoid touching the cacheline size or MWI bit.
75 * pSeries firmware sets the cacheline size (which is not the cpu cacheline
76 * size in all cases) and hardware treats MWI the same as memory write.
78 #define PCI_DISABLE_MWI
81 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
82 enum pci_dma_burst_strategy *strat,
83 unsigned long *strategy_parameter)
85 unsigned long cacheline_size;
88 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
90 cacheline_size = 1024;
92 cacheline_size = (int) byte * 4;
94 *strat = PCI_DMA_BURST_MULTIPLE;
95 *strategy_parameter = cacheline_size;
102 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
103 enum pci_dma_burst_strategy *strat,
104 unsigned long *strategy_parameter)
106 *strat = PCI_DMA_BURST_INFINITY;
107 *strategy_parameter = ~0UL;
110 #endif /* CONFIG_PPC64 */
112 extern int pci_domain_nr(struct pci_bus *bus);
114 /* Decide whether to display the domain number in /proc */
115 extern int pci_proc_domain(struct pci_bus *bus);
118 struct vm_area_struct;
119 /* Map a range of PCI memory or I/O space for a device into user space */
120 int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
121 enum pci_mmap_state mmap_state, int write_combine);
123 /* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
124 #define HAVE_PCI_MMAP 1
126 #if defined(CONFIG_PPC64) || defined(CONFIG_NOT_COHERENT_CACHE)
128 * For 64-bit kernels, pci_unmap_{single,page} is not a nop.
129 * For 32-bit non-coherent kernels, pci_dma_sync_single_for_cpu() and
130 * so on are not nops.
133 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
134 dma_addr_t ADDR_NAME;
135 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
137 #define pci_unmap_addr(PTR, ADDR_NAME) \
139 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
140 (((PTR)->ADDR_NAME) = (VAL))
141 #define pci_unmap_len(PTR, LEN_NAME) \
143 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
144 (((PTR)->LEN_NAME) = (VAL))
146 #else /* 32-bit && coherent */
148 /* pci_unmap_{page,single} is a nop so... */
149 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
150 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
151 #define pci_unmap_addr(PTR, ADDR_NAME) (0)
152 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
153 #define pci_unmap_len(PTR, LEN_NAME) (0)
154 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
156 #endif /* CONFIG_PPC64 || CONFIG_NOT_COHERENT_CACHE */
160 /* The PCI address space does not equal the physical memory address
161 * space (we have an IOMMU). The IDE and SCSI device layers use
162 * this boolean for bounce buffer decisions.
164 #define PCI_DMA_BUS_IS_PHYS (0)
168 /* The PCI address space does equal the physical memory
169 * address space (no IOMMU). The IDE and SCSI device layers use
170 * this boolean for bounce buffer decisions.
172 #define PCI_DMA_BUS_IS_PHYS (1)
174 #endif /* CONFIG_PPC64 */
176 extern void pcibios_resource_to_bus(struct pci_dev *dev,
177 struct pci_bus_region *region,
178 struct resource *res);
180 extern void pcibios_bus_to_resource(struct pci_dev *dev,
181 struct resource *res,
182 struct pci_bus_region *region);
184 static inline struct resource *pcibios_select_root(struct pci_dev *pdev,
185 struct resource *res)
187 struct resource *root = NULL;
189 if (res->flags & IORESOURCE_IO)
190 root = &ioport_resource;
191 if (res->flags & IORESOURCE_MEM)
192 root = &iomem_resource;
197 extern void pcibios_setup_new_device(struct pci_dev *dev);
199 extern void pcibios_claim_one_bus(struct pci_bus *b);
201 extern void pcibios_resource_survey(void);
203 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
205 extern struct pci_dev *of_create_pci_dev(struct device_node *node,
206 struct pci_bus *bus, int devfn);
208 extern void of_scan_pci_bridge(struct device_node *node,
209 struct pci_dev *dev);
211 extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
213 extern int pci_read_irq_line(struct pci_dev *dev);
216 extern pgprot_t pci_phys_mem_access_prot(struct file *file,
221 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
222 extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
223 const struct resource *rsrc,
224 resource_size_t *start, resource_size_t *end);
226 extern void pcibios_do_bus_setup(struct pci_bus *bus);
227 extern void pcibios_fixup_of_probed_bus(struct pci_bus *bus);
229 #endif /* __KERNEL__ */
230 #endif /* __ASM_POWERPC_PCI_H */