arch/alpha/include/asm/pci.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ALPHA_PCI_H
   3 #define __ALPHA_PCI_H
   4
   5 #ifdef __KERNEL__
   6
   7 #include <linux/spinlock.h>
   8 #include <linux/dma-mapping.h>
   9 #include <linux/scatterlist.h>
  10 #include <asm/machvec.h>
  11
  12 /*
  13  * The following structure is used to manage multiple PCI busses.
  14  */
  15
  16 struct pci_iommu_arena;
  17 struct page;
  18
  19 /* A controller.  Used to manage multiple PCI busses.  */
  20
  21 struct pci_controller {
  22         struct pci_controller *next;
  23         struct pci_bus *bus;
  24         struct resource *io_space;
  25         struct resource *mem_space;
  26
  27         /* The following are for reporting to userland.  The invariant is
  28            that if we report a BWX-capable dense memory, we do not report
  29            a sparse memory at all, even if it exists.  */
  30         unsigned long sparse_mem_base;
  31         unsigned long dense_mem_base;
  32         unsigned long sparse_io_base;
  33         unsigned long dense_io_base;
  34
  35         /* This one's for the kernel only.  It's in KSEG somewhere.  */
  36         unsigned long config_space_base;
  37
  38         unsigned int index;
  39         /* For compatibility with current (as of July 2003) pciutils
  40            and XFree86. Eventually will be removed. */
  41         unsigned int need_domain_info;
  42
  43         struct pci_iommu_arena *sg_pci;
  44         struct pci_iommu_arena *sg_isa;
  45
  46         void *sysdata;
  47 };
  48
  49 /* Override the logic in pci_scan_bus for skipping already-configured
  50    bus numbers.  */
  51
  52 #define pcibios_assign_all_busses()     1
  53
  54 #define PCIBIOS_MIN_IO          alpha_mv.min_io_address
  55 #define PCIBIOS_MIN_MEM         alpha_mv.min_mem_address
  56
  57 /* IOMMU controls.  */
  58
  59 /* The PCI address space does not equal the physical memory address space.
  60    The networking and block device layers use this boolean for bounce buffer
  61    decisions.  */
  62 #define PCI_DMA_BUS_IS_PHYS  0
  63
  64 /* TODO: integrate with include/asm-generic/pci.h ? */
  65 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  66 {
  67         return channel ? 15 : 14;
  68 }
  69
  70 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
  71
  72 static inline int pci_proc_domain(struct pci_bus *bus)
  73 {
  74         struct pci_controller *hose = bus->sysdata;
  75         return hose->need_domain_info;
  76 }
  77
  78 #endif /* __KERNEL__ */
  79
  80 /* Values for the `which' argument to sys_pciconfig_iobase.  */
  81 #define IOBASE_HOSE             0
  82 #define IOBASE_SPARSE_MEM       1
  83 #define IOBASE_DENSE_MEM        2
  84 #define IOBASE_SPARSE_IO        3
  85 #define IOBASE_DENSE_IO         4
  86 #define IOBASE_ROOT_BUS         5
  87 #define IOBASE_FROM_HOSE        0x10000
  88
  89 extern struct pci_dev *isa_bridge;
  90
  91 extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
  92                            size_t count);
  93 extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
  94                             size_t count);
  95 extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
  96                                       struct vm_area_struct *vma,
  97                                       enum pci_mmap_state mmap_state);
  98 extern void pci_adjust_legacy_attr(struct pci_bus *bus,
  99                                    enum pci_mmap_state mmap_type);
 100 #define HAVE_PCI_LEGACY 1
 101
 102 extern int pci_create_resource_files(struct pci_dev *dev);
 103 extern void pci_remove_resource_files(struct pci_dev *dev);
 104
 105 #endif /* __ALPHA_PCI_H */