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 #include <linux/types.h>
  18 #include <linux/ioport.h>
  19 #include <linux/list.h>
  20 #include <linux/errno.h>
  21 #include <linux/device.h>
  22 #include <linux/rio_regs.h>
  23
  24 #define RIO_NO_HOPCOUNT         -1
  25 #define RIO_INVALID_DESTID      0xffff
  26
  27 #define RIO_MAX_MPORT_RESOURCES 16
  28 #define RIO_MAX_DEV_RESOURCES   16
  29
  30 #define RIO_GLOBAL_TABLE        0xff    /* Indicates access of a switch's
  31                                            global routing table if it
  32                                            has multiple (or per port)
  33                                            tables */
  34
  35 #define RIO_INVALID_ROUTE       0xff    /* Indicates that a route table
  36                                            entry is invalid (no route
  37                                            exists for the device ID) */
  38
  39 #define RIO_MAX_ROUTE_ENTRIES(size)     (size ? (1 << 16) : (1 << 8))
  40 #define RIO_ANY_DESTID(size)            (size ? 0xffff : 0xff)
  41
  42 #define RIO_MAX_MBOX            4
  43 #define RIO_MAX_MSG_SIZE        0x1000
  44
  45 /*
  46  * Error values that may be returned by RIO functions.
  47  */
  48 #define RIO_SUCCESSFUL                  0x00
  49 #define RIO_BAD_SIZE                    0x81
  50
  51 /*
  52  * For RIO devices, the region numbers are assigned this way:
  53  *
  54  *      0       RapidIO outbound doorbells
  55  *      1-15    RapidIO memory regions
  56  *
  57  * For RIO master ports, the region number are assigned this way:
  58  *
  59  *      0       RapidIO inbound doorbells
  60  *      1       RapidIO inbound mailboxes
  61  *      1       RapidIO outbound mailboxes
  62  */
  63 #define RIO_DOORBELL_RESOURCE   0
  64 #define RIO_INB_MBOX_RESOURCE   1
  65 #define RIO_OUTB_MBOX_RESOURCE  2
  66
  67 extern struct bus_type rio_bus_type;
  68 extern struct list_head rio_devices;    /* list of all devices */
  69
  70 struct rio_mport;
  71
  72 /**
  73  * struct rio_dev - RIO device info
  74  * @global_list: Node in list of all RIO devices
  75  * @net_list: Node in list of RIO devices in a network
  76  * @net: Network this device is a part of
  77  * @did: Device ID
  78  * @vid: Vendor ID
  79  * @device_rev: Device revision
  80  * @asm_did: Assembly device ID
  81  * @asm_vid: Assembly vendor ID
  82  * @asm_rev: Assembly revision
  83  * @efptr: Extended feature pointer
  84  * @pef: Processing element features
  85  * @swpinfo: Switch port info
  86  * @src_ops: Source operation capabilities
  87  * @dst_ops: Destination operation capabilities
  88  * @dma_mask: Mask of bits of RIO address this device implements
  89  * @rswitch: Pointer to &struct rio_switch if valid for this device
  90  * @driver: Driver claiming this device
  91  * @dev: Device model device
  92  * @riores: RIO resources this device owns
  93  * @destid: Network destination ID
  94  */
  95 struct rio_dev {
  96         struct list_head global_list;   /* node in list of all RIO devices */
  97         struct list_head net_list;      /* node in per net list */
  98         struct rio_net *net;    /* RIO net this device resides in */
  99         u16 did;
 100         u16 vid;
 101         u32 device_rev;
 102         u16 asm_did;
 103         u16 asm_vid;
 104         u16 asm_rev;
 105         u16 efptr;
 106         u32 pef;
 107         u32 swpinfo;            /* Only used for switches */
 108         u32 src_ops;
 109         u32 dst_ops;
 110         u64 dma_mask;
 111         struct rio_switch *rswitch;     /* RIO switch info */
 112         struct rio_driver *driver;      /* RIO driver claiming this device */
 113         struct device dev;      /* LDM device structure */
 114         struct resource riores[RIO_MAX_DEV_RESOURCES];
 115         u16 destid;
 116 };
 117
 118 #define rio_dev_g(n) list_entry(n, struct rio_dev, global_list)
 119 #define rio_dev_f(n) list_entry(n, struct rio_dev, net_list)
 120 #define to_rio_dev(n) container_of(n, struct rio_dev, dev)
 121
 122 /**
 123  * struct rio_msg - RIO message event
 124  * @res: Mailbox resource
 125  * @mcback: Message event callback
 126  */
 127 struct rio_msg {
 128         struct resource *res;
 129         void (*mcback) (struct rio_mport * mport, void *dev_id, int mbox, int slot);
 130 };
 131
 132 /**
 133  * struct rio_dbell - RIO doorbell event
 134  * @node: Node in list of doorbell events
 135  * @res: Doorbell resource
 136  * @dinb: Doorbell event callback
 137  * @dev_id: Device specific pointer to pass on event
 138  */
 139 struct rio_dbell {
 140         struct list_head node;
 141         struct resource *res;
 142         void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16 dst, u16 info);
 143         void *dev_id;
 144 };
 145
 146 enum rio_phy_type {
 147         RIO_PHY_PARALLEL,
 148         RIO_PHY_SERIAL,
 149 };
 150
 151 /**
 152  * struct rio_mport - RIO master port info
 153  * @dbells: List of doorbell events
 154  * @node: Node in global list of master ports
 155  * @nnode: Node in network list of master ports
 156  * @iores: I/O mem resource that this master port interface owns
 157  * @riores: RIO resources that this master port interfaces owns
 158  * @inb_msg: RIO inbound message event descriptors
 159  * @outb_msg: RIO outbound message event descriptors
 160  * @host_deviceid: Host device ID associated with this master port
 161  * @ops: configuration space functions
 162  * @id: Port ID, unique among all ports
 163  * @index: Port index, unique among all port interfaces of the same type
 164  * @sys_size: RapidIO common transport system size
 165  * @phy_type: RapidIO phy type
 166  * @name: Port name string
 167  * @priv: Master port private data
 168  */
 169 struct rio_mport {
 170         struct list_head dbells;        /* list of doorbell events */
 171         struct list_head node;  /* node in global list of ports */
 172         struct list_head nnode; /* node in net list of ports */
 173         struct resource iores;
 174         struct resource riores[RIO_MAX_MPORT_RESOURCES];
 175         struct rio_msg inb_msg[RIO_MAX_MBOX];
 176         struct rio_msg outb_msg[RIO_MAX_MBOX];
 177         int host_deviceid;      /* Host device ID */
 178         struct rio_ops *ops;    /* maintenance transaction functions */
 179         unsigned char id;       /* port ID, unique among all ports */
 180         unsigned char index;    /* port index, unique among all port
 181                                    interfaces of the same type */
 182         unsigned int sys_size;  /* RapidIO common transport system size.
 183                                  * 0 - Small size. 256 devices.
 184                                  * 1 - Large size, 65536 devices.
 185                                  */
 186         enum rio_phy_type phy_type;     /* RapidIO phy type */
 187         unsigned char name[40];
 188         void *priv;             /* Master port private data */
 189 };
 190
 191 /**
 192  * struct rio_net - RIO network info
 193  * @node: Node in global list of RIO networks
 194  * @devices: List of devices in this network
 195  * @mports: List of master ports accessing this network
 196  * @hport: Default port for accessing this network
 197  * @id: RIO network ID
 198  */
 199 struct rio_net {
 200         struct list_head node;  /* node in list of networks */
 201         struct list_head devices;       /* list of devices in this net */
 202         struct list_head mports;        /* list of ports accessing net */
 203         struct rio_mport *hport;        /* primary port for accessing net */
 204         unsigned char id;       /* RIO network ID */
 205 };
 206
 207 /**
 208  * struct rio_switch - RIO switch info
 209  * @node: Node in global list of switches
 210  * @switchid: Switch ID that is unique across a network
 211  * @hopcount: Hopcount to this switch
 212  * @destid: Associated destid in the path
 213  * @route_table: Copy of switch routing table
 214  * @add_entry: Callback for switch-specific route add function
 215  * @get_entry: Callback for switch-specific route get function
 216  */
 217 struct rio_switch {
 218         struct list_head node;
 219         u16 switchid;
 220         u16 hopcount;
 221         u16 destid;
 222         u8 *route_table;
 223         int (*add_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
 224                           u16 table, u16 route_destid, u8 route_port);
 225         int (*get_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
 226                           u16 table, u16 route_destid, u8 * route_port);
 227 };
 228
 229 /* Low-level architecture-dependent routines */
 230
 231 /**
 232  * struct rio_ops - Low-level RIO configuration space operations
 233  * @lcread: Callback to perform local (master port) read of config space.
 234  * @lcwrite: Callback to perform local (master port) write of config space.
 235  * @cread: Callback to perform network read of config space.
 236  * @cwrite: Callback to perform network write of config space.
 237  * @dsend: Callback to send a doorbell message.
 238  */
 239 struct rio_ops {
 240         int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
 241                         u32 *data);
 242         int (*lcwrite) (struct rio_mport *mport, int index, u32 offset, int len,
 243                         u32 data);
 244         int (*cread) (struct rio_mport *mport, int index, u16 destid,
 245                         u8 hopcount, u32 offset, int len, u32 *data);
 246         int (*cwrite) (struct rio_mport *mport, int index, u16 destid,
 247                         u8 hopcount, u32 offset, int len, u32 data);
 248         int (*dsend) (struct rio_mport *mport, int index, u16 destid, u16 data);
 249 };
 250
 251 #define RIO_RESOURCE_MEM        0x00000100
 252 #define RIO_RESOURCE_DOORBELL   0x00000200
 253 #define RIO_RESOURCE_MAILBOX    0x00000400
 254
 255 #define RIO_RESOURCE_CACHEABLE  0x00010000
 256 #define RIO_RESOURCE_PCI        0x00020000
 257
 258 #define RIO_RESOURCE_BUSY       0x80000000
 259
 260 /**
 261  * struct rio_driver - RIO driver info
 262  * @node: Node in list of drivers
 263  * @name: RIO driver name
 264  * @id_table: RIO device ids to be associated with this driver
 265  * @probe: RIO device inserted
 266  * @remove: RIO device removed
 267  * @suspend: RIO device suspended
 268  * @resume: RIO device awakened
 269  * @enable_wake: RIO device enable wake event
 270  * @driver: LDM driver struct
 271  *
 272  * Provides info on a RIO device driver for insertion/removal and
 273  * power management purposes.
 274  */
 275 struct rio_driver {
 276         struct list_head node;
 277         char *name;
 278         const struct rio_device_id *id_table;
 279         int (*probe) (struct rio_dev * dev, const struct rio_device_id * id);
 280         void (*remove) (struct rio_dev * dev);
 281         int (*suspend) (struct rio_dev * dev, u32 state);
 282         int (*resume) (struct rio_dev * dev);
 283         int (*enable_wake) (struct rio_dev * dev, u32 state, int enable);
 284         struct device_driver driver;
 285 };
 286
 287 #define to_rio_driver(drv) container_of(drv,struct rio_driver, driver)
 288
 289 /**
 290  * struct rio_device_id - RIO device identifier
 291  * @did: RIO device ID
 292  * @vid: RIO vendor ID
 293  * @asm_did: RIO assembly device ID
 294  * @asm_vid: RIO assembly vendor ID
 295  *
 296  * Identifies a RIO device based on both the device/vendor IDs and
 297  * the assembly device/vendor IDs.
 298  */
 299 struct rio_device_id {
 300         u16 did, vid;
 301         u16 asm_did, asm_vid;
 302 };
 303
 304 /**
 305  * struct rio_route_ops - Per-switch route operations
 306  * @vid: RIO vendor ID
 307  * @did: RIO device ID
 308  * @add_hook: Callback that adds a route entry
 309  * @get_hook: Callback that gets a route entry
 310  *
 311  * Defines the operations that are necessary to manipulate the route
 312  * tables for a particular RIO switch device.
 313  */
 314 struct rio_route_ops {
 315         u16 vid, did;
 316         int (*add_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
 317                          u16 table, u16 route_destid, u8 route_port);
 318         int (*get_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
 319                          u16 table, u16 route_destid, u8 * route_port);
 320 };
 321
 322 /* Architecture and hardware-specific functions */
 323 extern int rio_init_mports(void);
 324 extern void rio_register_mport(struct rio_mport *);
 325 extern int rio_hw_add_outb_message(struct rio_mport *, struct rio_dev *, int,
 326                                    void *, size_t);
 327 extern int rio_hw_add_inb_buffer(struct rio_mport *, int, void *);
 328 extern void *rio_hw_get_inb_message(struct rio_mport *, int);
 329 extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
 330 extern void rio_close_inb_mbox(struct rio_mport *, int);
 331 extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
 332 extern void rio_close_outb_mbox(struct rio_mport *, int);
 333
 334 #endif                          /* LINUX_RIO_H */