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-mapping.h>
  13 #include <linux/scatterlist.h>
  14
  15 #include <asm/machdep.h>
  16 #include <asm/io.h>
  17 #include <asm/prom.h>
  18 #include <asm/pci-bridge.h>
  19
  20 /* Return values for pci_controller_ops.probe_mode function */
  21 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
  22 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
  23 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
  24
  25 #define PCIBIOS_MIN_IO          0x1000
  26 #define PCIBIOS_MIN_MEM         0x10000000
  27
  28 /* Values for the `which' argument to sys_pciconfig_iobase syscall.  */
  29 #define IOBASE_BRIDGE_NUMBER    0
  30 #define IOBASE_MEMORY           1
  31 #define IOBASE_IO               2
  32 #define IOBASE_ISA_IO           3
  33 #define IOBASE_ISA_MEM          4
  34
  35 /*
  36  * Set this to 1 if you want the kernel to re-assign all PCI
  37  * bus numbers (don't do that on ppc64 yet !)
  38  */
  39 #define pcibios_assign_all_busses() \
  40         (pci_has_flag(PCI_REASSIGN_ALL_BUS))
  41
  42 #define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
  43 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  44 {
  45         if (ppc_md.pci_get_legacy_ide_irq)
  46                 return ppc_md.pci_get_legacy_ide_irq(dev, channel);
  47         return channel ? 15 : 14;
  48 }
  49
  50 #ifdef CONFIG_PCI
  51 extern void set_pci_dma_ops(const struct dma_map_ops *dma_ops);
  52 #else   /* CONFIG_PCI */
  53 #define set_pci_dma_ops(d)
  54 #endif
  55
  56 #ifdef CONFIG_PPC64
  57
  58 /*
  59  * We want to avoid touching the cacheline size or MWI bit.
  60  * pSeries firmware sets the cacheline size (which is not the cpu cacheline
  61  * size in all cases) and hardware treats MWI the same as memory write.
  62  */
  63 #define PCI_DISABLE_MWI
  64
  65 #endif /* CONFIG_PPC64 */
  66
  67 extern int pci_domain_nr(struct pci_bus *bus);
  68
  69 /* Decide whether to display the domain number in /proc */
  70 extern int pci_proc_domain(struct pci_bus *bus);
  71
  72 struct vm_area_struct;
  73
  74 /* Tell PCI code what kind of PCI resource mappings we support */
  75 #define HAVE_PCI_MMAP                   1
  76 #define ARCH_GENERIC_PCI_MMAP_RESOURCE  1
  77 #define arch_can_pci_mmap_io()          1
  78 #define arch_can_pci_mmap_wc()          1
  79
  80 extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
  81                            size_t count);
  82 extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
  83                            size_t count);
  84 extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
  85                                       struct vm_area_struct *vma,
  86                                       enum pci_mmap_state mmap_state);
  87
  88 #define HAVE_PCI_LEGACY 1
  89
  90 extern void pcibios_claim_one_bus(struct pci_bus *b);
  91
  92 extern void pcibios_finish_adding_to_bus(struct pci_bus *bus);
  93
  94 extern void pcibios_resource_survey(void);
  95
  96 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
  97 extern int remove_phb_dynamic(struct pci_controller *phb);
  98
  99 extern struct pci_dev *of_create_pci_dev(struct device_node *node,
 100                                         struct pci_bus *bus, int devfn);
 101
 102 extern unsigned int pci_parse_of_flags(u32 addr0, int bridge);
 103
 104 extern void of_scan_pci_bridge(struct pci_dev *dev);
 105
 106 extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
 107 extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus);
 108
 109 struct file;
 110 extern pgprot_t pci_phys_mem_access_prot(struct file *file,
 111                                          unsigned long pfn,
 112                                          unsigned long size,
 113                                          pgprot_t prot);
 114
 115 extern resource_size_t pcibios_io_space_offset(struct pci_controller *hose);
 116 extern void pcibios_setup_bus_devices(struct pci_bus *bus);
 117 extern void pcibios_setup_bus_self(struct pci_bus *bus);
 118 extern void pcibios_setup_phb_io_space(struct pci_controller *hose);
 119 extern void pcibios_scan_phb(struct pci_controller *hose);
 120
 121 #endif  /* __KERNEL__ */
 122
 123 extern struct pci_dev *pnv_pci_get_gpu_dev(struct pci_dev *npdev);
 124 extern struct pci_dev *pnv_pci_get_npu_dev(struct pci_dev *gpdev, int index);
 125 extern int pnv_npu2_init(struct pci_controller *hose);
 126 extern int pnv_npu2_map_lpar_dev(struct pci_dev *gpdev, unsigned int lparid,
 127                 unsigned long msr);
 128 extern int pnv_npu2_unmap_lpar_dev(struct pci_dev *gpdev);
 129
 130 #endif /* __ASM_POWERPC_PCI_H */