include/asm-sparc64/sbus.h

   1 /* sbus.h: Defines for the Sun SBus.
   2  *
   3  * Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net)
   4  */
   5
   6 #ifndef _SPARC64_SBUS_H
   7 #define _SPARC64_SBUS_H
   8
   9 #include <linux/dma-mapping.h>
  10 #include <linux/ioport.h>
  11
  12 #include <asm/oplib.h>
  13 #include <asm/prom.h>
  14 #include <asm/of_device.h>
  15 #include <asm/iommu.h>
  16 #include <asm/scatterlist.h>
  17
  18 /* We scan which devices are on the SBus using the PROM node device
  19  * tree.  SBus devices are described in two different ways.  You can
  20  * either get an absolute address at which to access the device, or
  21  * you can get a SBus 'slot' number and an offset within that slot.
  22  */
  23
  24 /* The base address at which to calculate device OBIO addresses. */
  25 #define SUN_SBUS_BVADDR        0x00000000
  26 #define SBUS_OFF_MASK          0x0fffffff
  27
  28 /* These routines are used to calculate device address from slot
  29  * numbers + offsets, and vice versa.
  30  */
  31
  32 static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset)
  33 {
  34   return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
  35 }
  36
  37 static inline int sbus_dev_slot(unsigned long dev_addr)
  38 {
  39   return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
  40 }
  41
  42 struct sbus_bus;
  43
  44 /* Linux SBUS device tables */
  45 struct sbus_dev {
  46         struct of_device        ofdev;
  47         struct sbus_bus         *bus;
  48         struct sbus_dev         *next;
  49         struct sbus_dev         *child;
  50         struct sbus_dev         *parent;
  51         int prom_node;
  52         char prom_name[64];
  53         int slot;
  54
  55         struct resource resource[PROMREG_MAX];
  56
  57         struct linux_prom_registers reg_addrs[PROMREG_MAX];
  58         int num_registers;
  59
  60         struct linux_prom_ranges device_ranges[PROMREG_MAX];
  61         int num_device_ranges;
  62
  63         unsigned int irqs[4];
  64         int num_irqs;
  65 };
  66 #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
  67
  68 /* This struct describes the SBus(s) found on this machine. */
  69 struct sbus_bus {
  70         struct of_device        ofdev;
  71         struct sbus_dev         *devices;       /* Tree of SBUS devices */
  72         struct sbus_bus         *next;          /* Next SBUS in system  */
  73         int                     prom_node;      /* OBP node of SBUS     */
  74         char                    prom_name[64];  /* Usually "sbus" or "sbi" */
  75         int                     clock_freq;
  76
  77         struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
  78         int num_sbus_ranges;
  79
  80         int portid;
  81 };
  82 #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
  83
  84 extern struct sbus_bus *sbus_root;
  85
  86 /* Device probing routines could find these handy */
  87 #define for_each_sbus(bus) \
  88         for((bus) = sbus_root; (bus); (bus)=(bus)->next)
  89
  90 #define for_each_sbusdev(device, bus) \
  91         for((device) = (bus)->devices; (device); (device)=(device)->next)
  92
  93 #define for_all_sbusdev(device, bus) \
  94         for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
  95                 for ((device) = (bus)->devices; (device); (device) = (device)->next)
  96
  97 /* Driver DVMA interfaces. */
  98 #define sbus_can_dma_64bit(sdev)        (1)
  99 #define sbus_can_burst64(sdev)          (1)
 100 extern void sbus_set_sbus64(struct sbus_dev *, int);
 101 extern void sbus_fill_device_irq(struct sbus_dev *);
 102
 103 static inline void *sbus_alloc_consistent(struct sbus_dev *sdev , size_t size,
 104                                           dma_addr_t *dma_handle)
 105 {
 106         return dma_alloc_coherent(&sdev->ofdev.dev, size,
 107                                   dma_handle, GFP_ATOMIC);
 108 }
 109
 110 static inline void sbus_free_consistent(struct sbus_dev *sdev, size_t size,
 111                                         void *vaddr, dma_addr_t dma_handle)
 112 {
 113         return dma_free_coherent(&sdev->ofdev.dev, size, vaddr, dma_handle);
 114 }
 115
 116 #define SBUS_DMA_BIDIRECTIONAL  DMA_BIDIRECTIONAL
 117 #define SBUS_DMA_TODEVICE       DMA_TO_DEVICE
 118 #define SBUS_DMA_FROMDEVICE     DMA_FROM_DEVICE
 119 #define SBUS_DMA_NONE           DMA_NONE
 120
 121 /* All the rest use streaming mode mappings. */
 122 static inline dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr,
 123                                          size_t size, int direction)
 124 {
 125         return dma_map_single(&sdev->ofdev.dev, ptr, size,
 126                               (enum dma_data_direction) direction);
 127 }
 128
 129 static inline void sbus_unmap_single(struct sbus_dev *sdev,
 130                                      dma_addr_t dma_addr, size_t size,
 131                                      int direction)
 132 {
 133         dma_unmap_single(&sdev->ofdev.dev, dma_addr, size,
 134                          (enum dma_data_direction) direction);
 135 }
 136
 137 static inline int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg,
 138                               int nents, int direction)
 139 {
 140         return dma_map_sg(&sdev->ofdev.dev, sg, nents,
 141                           (enum dma_data_direction) direction);
 142 }
 143
 144 static inline void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg,
 145                                  int nents, int direction)
 146 {
 147         dma_unmap_sg(&sdev->ofdev.dev, sg, nents,
 148                      (enum dma_data_direction) direction);
 149 }
 150
 151 /* Finally, allow explicit synchronization of streamable mappings. */
 152 static inline void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev,
 153                                                 dma_addr_t dma_handle,
 154                                                 size_t size, int direction)
 155 {
 156         dma_sync_single_for_cpu(&sdev->ofdev.dev, dma_handle, size,
 157                                 (enum dma_data_direction) direction);
 158 }
 159 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
 160
 161 static inline void sbus_dma_sync_single_for_device(struct sbus_dev *sdev,
 162                                                    dma_addr_t dma_handle,
 163                                                    size_t size, int direction)
 164 {
 165         /* No flushing needed to sync cpu writes to the device.  */
 166 }
 167
 168 static inline void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev,
 169                                             struct scatterlist *sg,
 170                                             int nents, int direction)
 171 {
 172         dma_sync_sg_for_cpu(&sdev->ofdev.dev, sg, nents,
 173                             (enum dma_data_direction) direction);
 174 }
 175 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
 176
 177 static inline void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev,
 178                                                struct scatterlist *sg,
 179                                                int nents, int direction)
 180 {
 181         /* No flushing needed to sync cpu writes to the device.  */
 182 }
 183
 184 extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *);
 185 extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
 186 extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *);
 187 extern int sbus_arch_preinit(void);
 188 extern void sbus_arch_postinit(void);
 189
 190 #endif /* !(_SPARC64_SBUS_H) */