arch/tile/include/asm/pci.h

   1 /*
   2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  */
  14
  15 #ifndef _ASM_TILE_PCI_H
  16 #define _ASM_TILE_PCI_H
  17
  18 #include <linux/pci.h>
  19 #include <asm-generic/pci_iomap.h>
  20
  21 /*
  22  * Structure of a PCI controller (host bridge)
  23  */
  24 struct pci_controller {
  25         int index;              /* PCI domain number */
  26         struct pci_bus *root_bus;
  27
  28         int first_busno;
  29         int last_busno;
  30
  31         int hv_cfg_fd[2];       /* config{0,1} fds for this PCIe controller */
  32         int hv_mem_fd;          /* fd to Hypervisor for MMIO operations */
  33
  34         struct pci_ops *ops;
  35
  36         int irq_base;           /* Base IRQ from the Hypervisor */
  37         int plx_gen1;           /* flag for PLX Gen 1 configuration */
  38
  39         /* Address ranges that are routed to this controller/bridge. */
  40         struct resource mem_resources[3];
  41 };
  42
  43 /*
  44  * The hypervisor maps the entirety of CPA-space as bus addresses, so
  45  * bus addresses are physical addresses.  The networking and block
  46  * device layers use this boolean for bounce buffer decisions.
  47  */
  48 #define PCI_DMA_BUS_IS_PHYS     1
  49
  50 int __devinit tile_pci_init(void);
  51 int __devinit pcibios_init(void);
  52
  53 static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) {}
  54
  55 void __devinit pcibios_fixup_bus(struct pci_bus *bus);
  56
  57 #define TILE_NUM_PCIE   2
  58
  59 #define pci_domain_nr(bus) (((struct pci_controller *)(bus)->sysdata)->index)
  60
  61 /*
  62  * This decides whether to display the domain number in /proc.
  63  */
  64 static inline int pci_proc_domain(struct pci_bus *bus)
  65 {
  66         return 1;
  67 }
  68
  69 /*
  70  * pcibios_assign_all_busses() tells whether or not the bus numbers
  71  * should be reassigned, in case the BIOS didn't do it correctly, or
  72  * in case we don't have a BIOS and we want to let Linux do it.
  73  */
  74 static inline int pcibios_assign_all_busses(void)
  75 {
  76         return 1;
  77 }
  78
  79 #define PCIBIOS_MIN_MEM         0
  80 #define PCIBIOS_MIN_IO          0
  81
  82 /*
  83  * This flag tells if the platform is TILEmpower that needs
  84  * special configuration for the PLX switch chip.
  85  */
  86 extern int tile_plx_gen1;
  87
  88 /* Use any cpu for PCI. */
  89 #define cpumask_of_pcibus(bus) cpu_online_mask
  90
  91 /* implement the pci_ DMA API in terms of the generic device dma_ one */
  92 #include <asm-generic/pci-dma-compat.h>
  93
  94 /* generic pci stuff */
  95 #include <asm-generic/pci.h>
  96
  97 #endif /* _ASM_TILE_PCI_H */