include/linux/rio.h

   1 /*
   2  * RapidIO interconnect services
   3  * (RapidIO Interconnect Specification, http://www.rapidio.org)
   4  *
   5  * Copyright 2005 MontaVista Software, Inc.
   6  * Matt Porter <mporter@kernel.crashing.org>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #ifndef LINUX_RIO_H
  15 #define LINUX_RIO_H
  16
  17 #ifdef __KERNEL__
  18
  19 #include <linux/types.h>
  20 #include <linux/ioport.h>
  21 #include <linux/list.h>
  22 #include <linux/errno.h>
  23 #include <linux/device.h>
  24 #include <linux/rio_regs.h>
  25
  26 #define RIO_ANY_DESTID          0xff
  27 #define RIO_NO_HOPCOUNT         -1
  28 #define RIO_INVALID_DESTID      0xffff
  29
  30 #define RIO_MAX_MPORT_RESOURCES 16
  31 #define RIO_MAX_DEV_RESOURCES   16
  32
  33 #define RIO_GLOBAL_TABLE        0xff    /* Indicates access of a switch's
  34                                            global routing table if it
  35                                            has multiple (or per port)
  36                                            tables */
  37
  38 #define RIO_INVALID_ROUTE       0xff    /* Indicates that a route table
  39                                            entry is invalid (no route
  40                                            exists for the device ID) */
  41
  42 #ifdef CONFIG_RAPIDIO_8_BIT_TRANSPORT
  43 #define RIO_MAX_ROUTE_ENTRIES   (1 << 8)
  44 #else
  45 #define RIO_MAX_ROUTE_ENTRIES   (1 << 16)
  46 #endif
  47
  48 #define RIO_MAX_MBOX            4
  49 #define RIO_MAX_MSG_SIZE        0x1000
  50
  51 /*
  52  * Error values that may be returned by RIO functions.
  53  */
  54 #define RIO_SUCCESSFUL                  0x00
  55 #define RIO_BAD_SIZE                    0x81
  56
  57 /*
  58  * For RIO devices, the region numbers are assigned this way:
  59  *
  60  *      0       RapidIO outbound doorbells
  61  *      1-15    RapidIO memory regions
  62  *
  63  * For RIO master ports, the region number are assigned this way:
  64  *
  65  *      0       RapidIO inbound doorbells
  66  *      1       RapidIO inbound mailboxes
  67  *      1       RapidIO outbound mailboxes
  68  */
  69 #define RIO_DOORBELL_RESOURCE   0
  70 #define RIO_INB_MBOX_RESOURCE   1
  71 #define RIO_OUTB_MBOX_RESOURCE  2
  72
  73 extern struct bus_type rio_bus_type;
  74 extern struct list_head rio_devices;    /* list of all devices */
  75
  76 struct rio_mport;
  77
  78 /**
  79  * struct rio_dev - RIO device info
  80  * @global_list: Node in list of all RIO devices
  81  * @net_list: Node in list of RIO devices in a network
  82  * @net: Network this device is a part of
  83  * @did: Device ID
  84  * @vid: Vendor ID
  85  * @device_rev: Device revision
  86  * @asm_did: Assembly device ID
  87  * @asm_vid: Assembly vendor ID
  88  * @asm_rev: Assembly revision
  89  * @efptr: Extended feature pointer
  90  * @pef: Processing element features
  91  * @swpinfo: Switch port info
  92  * @src_ops: Source operation capabilities
  93  * @dst_ops: Destination operation capabilities
  94  * @dma_mask: Mask of bits of RIO address this device implements
  95  * @rswitch: Pointer to &struct rio_switch if valid for this device
  96  * @driver: Driver claiming this device
  97  * @dev: Device model device
  98  * @riores: RIO resources this device owns
  99  * @destid: Network destination ID
 100  */
 101 struct rio_dev {
 102         struct list_head global_list;   /* node in list of all RIO devices */
 103         struct list_head net_list;      /* node in per net list */
 104         struct rio_net *net;    /* RIO net this device resides in */
 105         u16 did;
 106         u16 vid;
 107         u32 device_rev;
 108         u16 asm_did;
 109         u16 asm_vid;
 110         u16 asm_rev;
 111         u16 efptr;
 112         u32 pef;
 113         u32 swpinfo;            /* Only used for switches */
 114         u32 src_ops;
 115         u32 dst_ops;
 116         u64 dma_mask;
 117         struct rio_switch *rswitch;     /* RIO switch info */
 118         struct rio_driver *driver;      /* RIO driver claiming this device */
 119         struct device dev;      /* LDM device structure */
 120         struct resource riores[RIO_MAX_DEV_RESOURCES];
 121         u16 destid;
 122 };
 123
 124 #define rio_dev_g(n) list_entry(n, struct rio_dev, global_list)
 125 #define rio_dev_f(n) list_entry(n, struct rio_dev, net_list)
 126 #define to_rio_dev(n) container_of(n, struct rio_dev, dev)
 127
 128 /**
 129  * struct rio_msg - RIO message event
 130  * @res: Mailbox resource
 131  * @mcback: Message event callback
 132  */
 133 struct rio_msg {
 134         struct resource *res;
 135         void (*mcback) (struct rio_mport * mport, void *dev_id, int mbox, int slot);
 136 };
 137
 138 /**
 139  * struct rio_dbell - RIO doorbell event
 140  * @node: Node in list of doorbell events
 141  * @res: Doorbell resource
 142  * @dinb: Doorbell event callback
 143  * @dev_id: Device specific pointer to pass on event
 144  */
 145 struct rio_dbell {
 146         struct list_head node;
 147         struct resource *res;
 148         void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16 dst, u16 info);
 149         void *dev_id;
 150 };
 151
 152 /**
 153  * struct rio_mport - RIO master port info
 154  * @dbells: List of doorbell events
 155  * @node: Node in global list of master ports
 156  * @nnode: Node in network list of master ports
 157  * @iores: I/O mem resource that this master port interface owns
 158  * @riores: RIO resources that this master port interfaces owns
 159  * @inb_msg: RIO inbound message event descriptors
 160  * @outb_msg: RIO outbound message event descriptors
 161  * @host_deviceid: Host device ID associated with this master port
 162  * @ops: configuration space functions
 163  * @id: Port ID, unique among all ports
 164  * @index: Port index, unique among all port interfaces of the same type
 165  * @name: Port name string
 166  */
 167 struct rio_mport {
 168         struct list_head dbells;        /* list of doorbell events */
 169         struct list_head node;  /* node in global list of ports */
 170         struct list_head nnode; /* node in net list of ports */
 171         struct resource iores;
 172         struct resource riores[RIO_MAX_MPORT_RESOURCES];
 173         struct rio_msg inb_msg[RIO_MAX_MBOX];
 174         struct rio_msg outb_msg[RIO_MAX_MBOX];
 175         int host_deviceid;      /* Host device ID */
 176         struct rio_ops *ops;    /* maintenance transaction functions */
 177         unsigned char id;       /* port ID, unique among all ports */
 178         unsigned char index;    /* port index, unique among all port
 179                                    interfaces of the same type */
 180         unsigned char name[40];
 181 };
 182
 183 /**
 184  * struct rio_net - RIO network info
 185  * @node: Node in global list of RIO networks
 186  * @devices: List of devices in this network
 187  * @mports: List of master ports accessing this network
 188  * @hport: Default port for accessing this network
 189  * @id: RIO network ID
 190  */
 191 struct rio_net {
 192         struct list_head node;  /* node in list of networks */
 193         struct list_head devices;       /* list of devices in this net */
 194         struct list_head mports;        /* list of ports accessing net */
 195         struct rio_mport *hport;        /* primary port for accessing net */
 196         unsigned char id;       /* RIO network ID */
 197 };
 198
 199 /**
 200  * struct rio_switch - RIO switch info
 201  * @node: Node in global list of switches
 202  * @switchid: Switch ID that is unique across a network
 203  * @hopcount: Hopcount to this switch
 204  * @destid: Associated destid in the path
 205  * @route_table: Copy of switch routing table
 206  * @add_entry: Callback for switch-specific route add function
 207  * @get_entry: Callback for switch-specific route get function
 208  */
 209 struct rio_switch {
 210         struct list_head node;
 211         u16 switchid;
 212         u16 hopcount;
 213         u16 destid;
 214         u8 route_table[RIO_MAX_ROUTE_ENTRIES];
 215         int (*add_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
 216                           u16 table, u16 route_destid, u8 route_port);
 217         int (*get_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
 218                           u16 table, u16 route_destid, u8 * route_port);
 219 };
 220
 221 /* Low-level architecture-dependent routines */
 222
 223 /**
 224  * struct rio_ops - Low-level RIO configuration space operations
 225  * @lcread: Callback to perform local (master port) read of config space.
 226  * @lcwrite: Callback to perform local (master port) write of config space.
 227  * @cread: Callback to perform network read of config space.
 228  * @cwrite: Callback to perform network write of config space.
 229  * @dsend: Callback to send a doorbell message.
 230  */
 231 struct rio_ops {
 232         int (*lcread) (int index, u32 offset, int len, u32 * data);
 233         int (*lcwrite) (int index, u32 offset, int len, u32 data);
 234         int (*cread) (int index, u16 destid, u8 hopcount, u32 offset, int len,
 235                       u32 * data);
 236         int (*cwrite) (int index, u16 destid, u8 hopcount, u32 offset, int len,
 237                        u32 data);
 238         int (*dsend) (int index, u16 destid, u16 data);
 239 };
 240
 241 #define RIO_RESOURCE_MEM        0x00000100
 242 #define RIO_RESOURCE_DOORBELL   0x00000200
 243 #define RIO_RESOURCE_MAILBOX    0x00000400
 244
 245 #define RIO_RESOURCE_CACHEABLE  0x00010000
 246 #define RIO_RESOURCE_PCI        0x00020000
 247
 248 #define RIO_RESOURCE_BUSY       0x80000000
 249
 250 /**
 251  * struct rio_driver - RIO driver info
 252  * @node: Node in list of drivers
 253  * @name: RIO driver name
 254  * @id_table: RIO device ids to be associated with this driver
 255  * @probe: RIO device inserted
 256  * @remove: RIO device removed
 257  * @suspend: RIO device suspended
 258  * @resume: RIO device awakened
 259  * @enable_wake: RIO device enable wake event
 260  * @driver: LDM driver struct
 261  *
 262  * Provides info on a RIO device driver for insertion/removal and
 263  * power management purposes.
 264  */
 265 struct rio_driver {
 266         struct list_head node;
 267         char *name;
 268         const struct rio_device_id *id_table;
 269         int (*probe) (struct rio_dev * dev, const struct rio_device_id * id);
 270         void (*remove) (struct rio_dev * dev);
 271         int (*suspend) (struct rio_dev * dev, u32 state);
 272         int (*resume) (struct rio_dev * dev);
 273         int (*enable_wake) (struct rio_dev * dev, u32 state, int enable);
 274         struct device_driver driver;
 275 };
 276
 277 #define to_rio_driver(drv) container_of(drv,struct rio_driver, driver)
 278
 279 /**
 280  * struct rio_device_id - RIO device identifier
 281  * @did: RIO device ID
 282  * @vid: RIO vendor ID
 283  * @asm_did: RIO assembly device ID
 284  * @asm_vid: RIO assembly vendor ID
 285  *
 286  * Identifies a RIO device based on both the device/vendor IDs and
 287  * the assembly device/vendor IDs.
 288  */
 289 struct rio_device_id {
 290         u16 did, vid;
 291         u16 asm_did, asm_vid;
 292 };
 293
 294 /**
 295  * struct rio_route_ops - Per-switch route operations
 296  * @vid: RIO vendor ID
 297  * @did: RIO device ID
 298  * @add_hook: Callback that adds a route entry
 299  * @get_hook: Callback that gets a route entry
 300  *
 301  * Defines the operations that are necessary to manipulate the route
 302  * tables for a particular RIO switch device.
 303  */
 304 struct rio_route_ops {
 305         u16 vid, did;
 306         int (*add_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
 307                          u16 table, u16 route_destid, u8 route_port);
 308         int (*get_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
 309                          u16 table, u16 route_destid, u8 * route_port);
 310 };
 311
 312 /* Architecture and hardware-specific functions */
 313 extern int rio_init_mports(void);
 314 extern void rio_register_mport(struct rio_mport *);
 315 extern int rio_hw_add_outb_message(struct rio_mport *, struct rio_dev *, int,
 316                                    void *, size_t);
 317 extern int rio_hw_add_inb_buffer(struct rio_mport *, int, void *);
 318 extern void *rio_hw_get_inb_message(struct rio_mport *, int);
 319 extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
 320 extern void rio_close_inb_mbox(struct rio_mport *, int);
 321 extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
 322 extern void rio_close_outb_mbox(struct rio_mport *, int);
 323
 324 #endif                          /* __KERNEL__ */
 325 #endif                          /* LINUX_RIO_H */