include/asm-sparc64/sbus.h

   1 /* $Id: sbus.h,v 1.14 2000/02/18 13:50:55 davem Exp $
   2  * sbus.h: Defines for the Sun SBus.
   3  *
   4  * Copyright (C) 1996, 1999 David S. Miller (davem@redhat.com)
   5  */
   6
   7 #ifndef _SPARC64_SBUS_H
   8 #define _SPARC64_SBUS_H
   9
  10 #include <linux/dma-mapping.h>
  11 #include <linux/ioport.h>
  12
  13 #include <asm/oplib.h>
  14 #include <asm/iommu.h>
  15 #include <asm/scatterlist.h>
  16
  17 /* We scan which devices are on the SBus using the PROM node device
  18  * tree.  SBus devices are described in two different ways.  You can
  19  * either get an absolute address at which to access the device, or
  20  * you can get a SBus 'slot' number and an offset within that slot.
  21  */
  22
  23 /* The base address at which to calculate device OBIO addresses. */
  24 #define SUN_SBUS_BVADDR        0x00000000
  25 #define SBUS_OFF_MASK          0x0fffffff
  26
  27 /* These routines are used to calculate device address from slot
  28  * numbers + offsets, and vice versa.
  29  */
  30
  31 static __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
  32 {
  33   return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
  34 }
  35
  36 static __inline__ int sbus_dev_slot(unsigned long dev_addr)
  37 {
  38   return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
  39 }
  40
  41 struct sbus_bus;
  42
  43 /* Linux SBUS device tables */
  44 struct sbus_dev {
  45         struct sbus_bus *bus;   /* Our toplevel parent SBUS     */
  46         struct sbus_dev *next;  /* Chain of siblings            */
  47         struct sbus_dev *child; /* Chain of children            */
  48         struct sbus_dev *parent;/* Parent device if not toplevel*/
  49         int prom_node;          /* OBP node of this device      */
  50         char prom_name[64];     /* OBP device name property     */
  51         int slot;               /* SBUS slot number             */
  52
  53         struct resource resource[PROMREG_MAX];
  54
  55         struct linux_prom_registers reg_addrs[PROMREG_MAX];
  56         int num_registers, ranges_applied;
  57
  58         struct linux_prom_ranges device_ranges[PROMREG_MAX];
  59         int num_device_ranges;
  60
  61         unsigned int irqs[4];
  62         int num_irqs;
  63 };
  64
  65 /* This struct describes the SBus(s) found on this machine. */
  66 struct sbus_bus {
  67         void                    *iommu;         /* Opaque IOMMU cookie  */
  68         struct sbus_dev         *devices;       /* Tree of SBUS devices */
  69         struct sbus_bus         *next;          /* Next SBUS in system  */
  70         int                     prom_node;      /* OBP node of SBUS     */
  71         char                    prom_name[64];  /* Usually "sbus" or "sbi" */
  72         int                     clock_freq;
  73
  74         struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
  75         int num_sbus_ranges;
  76
  77         int portid;
  78         void *starfire_cookie;
  79 };
  80
  81 extern struct sbus_bus *sbus_root;
  82
  83 /* Device probing routines could find these handy */
  84 #define for_each_sbus(bus) \
  85         for((bus) = sbus_root; (bus); (bus)=(bus)->next)
  86
  87 #define for_each_sbusdev(device, bus) \
  88         for((device) = (bus)->devices; (device); (device)=(device)->next)
  89
  90 #define for_all_sbusdev(device, bus) \
  91         for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
  92                 for ((device) = (bus)->devices; (device); (device) = (device)->next)
  93
  94 /* Driver DVMA interfaces. */
  95 #define sbus_can_dma_64bit(sdev)        (1)
  96 #define sbus_can_burst64(sdev)          (1)
  97 extern void sbus_set_sbus64(struct sbus_dev *, int);
  98
  99 /* These yield IOMMU mappings in consistent mode. */
 100 extern void *sbus_alloc_consistent(struct sbus_dev *, size_t, dma_addr_t *dma_addrp);
 101 extern void sbus_free_consistent(struct sbus_dev *, size_t, void *, dma_addr_t);
 102
 103 #define SBUS_DMA_BIDIRECTIONAL  DMA_BIDIRECTIONAL
 104 #define SBUS_DMA_TODEVICE       DMA_TO_DEVICE
 105 #define SBUS_DMA_FROMDEVICE     DMA_FROM_DEVICE
 106 #define SBUS_DMA_NONE           DMA_NONE
 107
 108 /* All the rest use streaming mode mappings. */
 109 extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
 110 extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
 111 extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
 112 extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
 113
 114 /* Finally, allow explicit synchronization of streamable mappings. */
 115 extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
 116 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
 117 extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
 118 extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
 119 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
 120 extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
 121
 122 #endif /* !(_SPARC64_SBUS_H) */