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
41 extern int pci_assign_all_buses;
42 #define pcibios_assign_all_busses() (pci_assign_all_buses)
44 #define pcibios_scan_all_fns(a, b) 0
46 static inline void pcibios_set_master(struct pci_dev *dev)
48 /* No special bus mastering setup handling */
51 static inline void pcibios_penalize_isa_irq(int irq, int active)
53 /* We don't do dynamic PCI IRQ allocation */
56 #define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
57 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
59 if (ppc_md.pci_get_legacy_ide_irq)
60 return ppc_md.pci_get_legacy_ide_irq(dev, channel);
61 return channel ? 15 : 14;
67 * We want to avoid touching the cacheline size or MWI bit.
68 * pSeries firmware sets the cacheline size (which is not the cpu cacheline
69 * size in all cases) and hardware treats MWI the same as memory write.
71 #define PCI_DISABLE_MWI
73 extern struct dma_mapping_ops *pci_dma_ops;
75 /* For DAC DMA, we currently don't support it by default, but
76 * we let 64-bit platforms override this.
78 static inline int pci_dac_dma_supported(struct pci_dev *hwdev,u64 mask)
80 if (pci_dma_ops && pci_dma_ops->dac_dma_supported)
81 return pci_dma_ops->dac_dma_supported(&hwdev->dev, mask);
86 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
87 enum pci_dma_burst_strategy *strat,
88 unsigned long *strategy_parameter)
90 unsigned long cacheline_size;
93 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
95 cacheline_size = 1024;
97 cacheline_size = (int) byte * 4;
99 *strat = PCI_DMA_BURST_MULTIPLE;
100 *strategy_parameter = cacheline_size;
104 extern int pci_domain_nr(struct pci_bus *bus);
106 /* Decide whether to display the domain number in /proc */
107 extern int pci_proc_domain(struct pci_bus *bus);
112 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
113 enum pci_dma_burst_strategy *strat,
114 unsigned long *strategy_parameter)
116 *strat = PCI_DMA_BURST_INFINITY;
117 *strategy_parameter = ~0UL;
122 * At present there are very few 32-bit PPC machines that can have
123 * memory above the 4GB point, and we don't support that.
125 #define pci_dac_dma_supported(pci_dev, mask) (0)
127 /* Return the index of the PCI controller for device PDEV. */
128 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
130 /* Set the name of the bus as it appears in /proc/bus/pci */
131 static inline int pci_proc_domain(struct pci_bus *bus)
136 #endif /* CONFIG_PPC64 */
138 struct vm_area_struct;
139 /* Map a range of PCI memory or I/O space for a device into user space */
140 int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
141 enum pci_mmap_state mmap_state, int write_combine);
143 /* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
144 #define HAVE_PCI_MMAP 1
146 #if defined(CONFIG_PPC64) || defined(CONFIG_NOT_COHERENT_CACHE)
148 * For 64-bit kernels, pci_unmap_{single,page} is not a nop.
149 * For 32-bit non-coherent kernels, pci_dma_sync_single_for_cpu() and
150 * so on are not nops.
153 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
154 dma_addr_t ADDR_NAME;
155 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
157 #define pci_unmap_addr(PTR, ADDR_NAME) \
159 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
160 (((PTR)->ADDR_NAME) = (VAL))
161 #define pci_unmap_len(PTR, LEN_NAME) \
163 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
164 (((PTR)->LEN_NAME) = (VAL))
166 #else /* 32-bit && coherent */
168 /* pci_unmap_{page,single} is a nop so... */
169 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
170 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
171 #define pci_unmap_addr(PTR, ADDR_NAME) (0)
172 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
173 #define pci_unmap_len(PTR, LEN_NAME) (0)
174 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
176 #endif /* CONFIG_PPC64 || CONFIG_NOT_COHERENT_CACHE */
180 /* The PCI address space does not equal the physical memory address
181 * space (we have an IOMMU). The IDE and SCSI device layers use
182 * this boolean for bounce buffer decisions.
184 #define PCI_DMA_BUS_IS_PHYS (0)
188 /* The PCI address space does equal the physical memory
189 * address space (no IOMMU). The IDE and SCSI device layers use
190 * this boolean for bounce buffer decisions.
192 #define PCI_DMA_BUS_IS_PHYS (1)
194 #endif /* CONFIG_PPC64 */
196 extern void pcibios_resource_to_bus(struct pci_dev *dev,
197 struct pci_bus_region *region,
198 struct resource *res);
200 extern void pcibios_bus_to_resource(struct pci_dev *dev,
201 struct resource *res,
202 struct pci_bus_region *region);
204 static inline struct resource *pcibios_select_root(struct pci_dev *pdev,
205 struct resource *res)
207 struct resource *root = NULL;
209 if (res->flags & IORESOURCE_IO)
210 root = &ioport_resource;
211 if (res->flags & IORESOURCE_MEM)
212 root = &iomem_resource;
217 extern int unmap_bus_range(struct pci_bus *bus);
219 extern int remap_bus_range(struct pci_bus *bus);
221 extern void pcibios_fixup_device_resources(struct pci_dev *dev,
222 struct pci_bus *bus);
224 extern void pcibios_setup_new_device(struct pci_dev *dev);
226 extern void pcibios_claim_one_bus(struct pci_bus *b);
228 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
230 extern struct pci_dev *of_create_pci_dev(struct device_node *node,
231 struct pci_bus *bus, int devfn);
233 extern void of_scan_pci_bridge(struct device_node *node,
234 struct pci_dev *dev);
236 extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
238 extern int pci_read_irq_line(struct pci_dev *dev);
240 extern void pcibios_add_platform_entries(struct pci_dev *dev);
243 extern pgprot_t pci_phys_mem_access_prot(struct file *file,
248 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
249 extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
250 const struct resource *rsrc,
251 resource_size_t *start, resource_size_t *end);
253 #endif /* __KERNEL__ */
254 #endif /* __ASM_POWERPC_PCI_H */