arch/powerpc/include/asm/pci.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef __ASM_POWERPC_PCI_H
   3 #define __ASM_POWERPC_PCI_H
   4 #ifdef __KERNEL__
   5
   6 /*
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/slab.h>
  11 #include <linux/string.h>
  12 #include <linux/dma-map-ops.h>
  13 #include <linux/scatterlist.h>
  14
  15 #include <asm/machdep.h>
  16 #include <asm/io.h>
  17 #include <asm/pci-bridge.h>
  18
  19 /* Return values for pci_controller_ops.probe_mode function */
  20 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
  21 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
  22 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
  23
  24 #define PCIBIOS_MIN_IO          0x1000
  25 #define PCIBIOS_MIN_MEM         0x10000000
  26
  27 /* Values for the `which' argument to sys_pciconfig_iobase syscall.  */
  28 #define IOBASE_BRIDGE_NUMBER    0
  29 #define IOBASE_MEMORY           1
  30 #define IOBASE_IO               2
  31 #define IOBASE_ISA_IO           3
  32 #define IOBASE_ISA_MEM          4
  33
  34 /*
  35  * Set this to 1 if you want the kernel to re-assign all PCI
  36  * bus numbers (don't do that on ppc64 yet !)
  37  */
  38 #define pcibios_assign_all_busses() \
  39         (pci_has_flag(PCI_REASSIGN_ALL_BUS))
  40
  41 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  42 {
  43         if (ppc_md.pci_get_legacy_ide_irq)
  44                 return ppc_md.pci_get_legacy_ide_irq(dev, channel);
  45         return channel ? 15 : 14;
  46 }
  47
  48 #ifdef CONFIG_PCI
  49 void __init set_pci_dma_ops(const struct dma_map_ops *dma_ops);
  50 #else   /* CONFIG_PCI */
  51 #define set_pci_dma_ops(d)
  52 #endif
  53
  54 #ifdef CONFIG_PPC64
  55
  56 /*
  57  * We want to avoid touching the cacheline size or MWI bit.
  58  * pSeries firmware sets the cacheline size (which is not the cpu cacheline
  59  * size in all cases) and hardware treats MWI the same as memory write.
  60  */
  61 #define PCI_DISABLE_MWI
  62
  63 #endif /* CONFIG_PPC64 */
  64
  65 extern int pci_domain_nr(struct pci_bus *bus);
  66
  67 /* Decide whether to display the domain number in /proc */
  68 extern int pci_proc_domain(struct pci_bus *bus);
  69
  70 struct vm_area_struct;
  71
  72 /* Tell PCI code what kind of PCI resource mappings we support */
  73 #define HAVE_PCI_MMAP                   1
  74 #define ARCH_GENERIC_PCI_MMAP_RESOURCE  1
  75 #define arch_can_pci_mmap_io()          1
  76 #define arch_can_pci_mmap_wc()          1
  77
  78 extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
  79                            size_t count);
  80 extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
  81                            size_t count);
  82 extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
  83                                       struct vm_area_struct *vma,
  84                                       enum pci_mmap_state mmap_state);
  85 extern void pci_adjust_legacy_attr(struct pci_bus *bus,
  86                                    enum pci_mmap_state mmap_type);
  87 #define HAVE_PCI_LEGACY 1
  88
  89 extern void pcibios_claim_one_bus(struct pci_bus *b);
  90
  91 extern void pcibios_finish_adding_to_bus(struct pci_bus *bus);
  92
  93 extern void pcibios_resource_survey(void);
  94
  95 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
  96 extern int remove_phb_dynamic(struct pci_controller *phb);
  97
  98 extern struct pci_dev *of_create_pci_dev(struct device_node *node,
  99                                         struct pci_bus *bus, int devfn);
 100
 101 extern unsigned int pci_parse_of_flags(u32 addr0, int bridge);
 102
 103 extern void of_scan_pci_bridge(struct pci_dev *dev);
 104
 105 extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
 106 extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus);
 107
 108 extern pgprot_t pci_phys_mem_access_prot(unsigned long pfn,
 109                                          unsigned long size,
 110                                          pgprot_t prot);
 111
 112 extern resource_size_t pcibios_io_space_offset(struct pci_controller *hose);
 113 extern void pcibios_setup_bus_self(struct pci_bus *bus);
 114 extern void pcibios_setup_phb_io_space(struct pci_controller *hose);
 115 extern void pcibios_scan_phb(struct pci_controller *hose);
 116
 117 #endif  /* __KERNEL__ */
 118
 119 #endif /* __ASM_POWERPC_PCI_H */