arch/powerpc/include/asm/pci.h

   1 #ifndef __ASM_POWERPC_PCI_H
   2 #define __ASM_POWERPC_PCI_H
   3 #ifdef __KERNEL__
   4
   5 /*
   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.
  10  */
  11
  12 #include <linux/types.h>
  13 #include <linux/slab.h>
  14 #include <linux/string.h>
  15 #include <linux/dma-mapping.h>
  16
  17 #include <asm/machdep.h>
  18 #include <asm/scatterlist.h>
  19 #include <asm/io.h>
  20 #include <asm/prom.h>
  21 #include <asm/pci-bridge.h>
  22
  23 #include <asm-generic/pci-dma-compat.h>
  24
  25 #define PCIBIOS_MIN_IO          0x1000
  26 #define PCIBIOS_MIN_MEM         0x10000000
  27
  28 struct pci_dev;
  29
  30 /* Values for the `which' argument to sys_pciconfig_iobase syscall.  */
  31 #define IOBASE_BRIDGE_NUMBER    0
  32 #define IOBASE_MEMORY           1
  33 #define IOBASE_IO               2
  34 #define IOBASE_ISA_IO           3
  35 #define IOBASE_ISA_MEM          4
  36
  37 /*
  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 !)
  40  */
  41 #define pcibios_assign_all_busses() \
  42         (ppc_pci_has_flag(PPC_PCI_REASSIGN_ALL_BUS))
  43
  44 static inline void pcibios_set_master(struct pci_dev *dev)
  45 {
  46         /* No special bus mastering setup handling */
  47 }
  48
  49 static inline void pcibios_penalize_isa_irq(int irq, int active)
  50 {
  51         /* We don't do dynamic PCI IRQ allocation */
  52 }
  53
  54 #define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
  55 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  56 {
  57         if (ppc_md.pci_get_legacy_ide_irq)
  58                 return ppc_md.pci_get_legacy_ide_irq(dev, channel);
  59         return channel ? 15 : 14;
  60 }
  61
  62 #ifdef CONFIG_PCI
  63 extern void set_pci_dma_ops(struct dma_mapping_ops *dma_ops);
  64 extern struct dma_mapping_ops *get_pci_dma_ops(void);
  65 #else   /* CONFIG_PCI */
  66 #define set_pci_dma_ops(d)
  67 #define get_pci_dma_ops()       NULL
  68 #endif
  69
  70 #ifdef CONFIG_PPC64
  71
  72 /*
  73  * We want to avoid touching the cacheline size or MWI bit.
  74  * pSeries firmware sets the cacheline size (which is not the cpu cacheline
  75  * size in all cases) and hardware treats MWI the same as memory write.
  76  */
  77 #define PCI_DISABLE_MWI
  78
  79 #ifdef CONFIG_PCI
  80 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  81                                         enum pci_dma_burst_strategy *strat,
  82                                         unsigned long *strategy_parameter)
  83 {
  84         unsigned long cacheline_size;
  85         u8 byte;
  86
  87         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
  88         if (byte == 0)
  89                 cacheline_size = 1024;
  90         else
  91                 cacheline_size = (int) byte * 4;
  92
  93         *strat = PCI_DMA_BURST_MULTIPLE;
  94         *strategy_parameter = cacheline_size;
  95 }
  96 #endif
  97
  98 #else /* 32-bit */
  99
 100 #ifdef CONFIG_PCI
 101 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 102                                         enum pci_dma_burst_strategy *strat,
 103                                         unsigned long *strategy_parameter)
 104 {
 105         *strat = PCI_DMA_BURST_INFINITY;
 106         *strategy_parameter = ~0UL;
 107 }
 108 #endif
 109 #endif /* CONFIG_PPC64 */
 110
 111 extern int pci_domain_nr(struct pci_bus *bus);
 112
 113 /* Decide whether to display the domain number in /proc */
 114 extern int pci_proc_domain(struct pci_bus *bus);
 115
 116 /* MSI arch hooks */
 117 #define arch_setup_msi_irqs arch_setup_msi_irqs
 118 #define arch_teardown_msi_irqs arch_teardown_msi_irqs
 119 #define arch_msi_check_device arch_msi_check_device
 120
 121 struct vm_area_struct;
 122 /* Map a range of PCI memory or I/O space for a device into user space */
 123 int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
 124                         enum pci_mmap_state mmap_state, int write_combine);
 125
 126 /* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
 127 #define HAVE_PCI_MMAP   1
 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
 137 #define HAVE_PCI_LEGACY 1
 138
 139 #if defined(CONFIG_PPC64) || defined(CONFIG_NOT_COHERENT_CACHE)
 140 /*
 141  * For 64-bit kernels, pci_unmap_{single,page} is not a nop.
 142  * For 32-bit non-coherent kernels, pci_dma_sync_single_for_cpu() and
 143  * so on are not nops.
 144  * and thus...
 145  */
 146 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
 147         dma_addr_t ADDR_NAME;
 148 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
 149         __u32 LEN_NAME;
 150 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
 151         ((PTR)->ADDR_NAME)
 152 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
 153         (((PTR)->ADDR_NAME) = (VAL))
 154 #define pci_unmap_len(PTR, LEN_NAME)                    \
 155         ((PTR)->LEN_NAME)
 156 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
 157         (((PTR)->LEN_NAME) = (VAL))
 158
 159 #else /* 32-bit && coherent */
 160
 161 /* pci_unmap_{page,single} is a nop so... */
 162 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 163 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 164 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 165 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 166 #define pci_unmap_len(PTR, LEN_NAME)            (0)
 167 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 168
 169 #endif /* CONFIG_PPC64 || CONFIG_NOT_COHERENT_CACHE */
 170
 171 #ifdef CONFIG_PPC64
 172
 173 /* The PCI address space does not equal the physical memory address
 174  * space (we have an IOMMU).  The IDE and SCSI device layers use
 175  * this boolean for bounce buffer decisions.
 176  */
 177 #define PCI_DMA_BUS_IS_PHYS     (0)
 178
 179 #else /* 32-bit */
 180
 181 /* The PCI address space does equal the physical memory
 182  * address space (no IOMMU).  The IDE and SCSI device layers use
 183  * this boolean for bounce buffer decisions.
 184  */
 185 #define PCI_DMA_BUS_IS_PHYS     (1)
 186
 187 #endif /* CONFIG_PPC64 */
 188
 189 extern void pcibios_resource_to_bus(struct pci_dev *dev,
 190                         struct pci_bus_region *region,
 191                         struct resource *res);
 192
 193 extern void pcibios_bus_to_resource(struct pci_dev *dev,
 194                         struct resource *res,
 195                         struct pci_bus_region *region);
 196
 197 extern void pcibios_claim_one_bus(struct pci_bus *b);
 198
 199 extern void pcibios_finish_adding_to_bus(struct pci_bus *bus);
 200
 201 extern void pcibios_resource_survey(void);
 202
 203 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
 204 extern int remove_phb_dynamic(struct pci_controller *phb);
 205
 206 extern struct pci_dev *of_create_pci_dev(struct device_node *node,
 207                                         struct pci_bus *bus, int devfn);
 208
 209 extern void of_scan_pci_bridge(struct device_node *node,
 210                                 struct pci_dev *dev);
 211
 212 extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
 213 extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus);
 214
 215 extern int pci_read_irq_line(struct pci_dev *dev);
 216
 217 struct file;
 218 extern pgprot_t pci_phys_mem_access_prot(struct file *file,
 219                                          unsigned long pfn,
 220                                          unsigned long size,
 221                                          pgprot_t prot);
 222
 223 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
 224 extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
 225                                  const struct resource *rsrc,
 226                                  resource_size_t *start, resource_size_t *end);
 227
 228 extern void pcibios_setup_bus_devices(struct pci_bus *bus);
 229 extern void pcibios_setup_bus_self(struct pci_bus *bus);
 230
 231 #endif  /* __KERNEL__ */
 232 #endif /* __ASM_POWERPC_PCI_H */