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 #define RIO_PW_MSG_SIZE         64
  68
  69 extern struct bus_type rio_bus_type;
  70 extern struct device rio_bus;
  71 extern struct list_head rio_devices;    /* list of all devices */
  72
  73 struct rio_mport;
  74 union rio_pw_msg;
  75
  76 /**
  77  * struct rio_dev - RIO device info
  78  * @global_list: Node in list of all RIO devices
  79  * @net_list: Node in list of RIO devices in a network
  80  * @net: Network this device is a part of
  81  * @did: Device ID
  82  * @vid: Vendor ID
  83  * @device_rev: Device revision
  84  * @asm_did: Assembly device ID
  85  * @asm_vid: Assembly vendor ID
  86  * @asm_rev: Assembly revision
  87  * @efptr: Extended feature pointer
  88  * @pef: Processing element features
  89  * @swpinfo: Switch port info
  90  * @src_ops: Source operation capabilities
  91  * @dst_ops: Destination operation capabilities
  92  * @comp_tag: RIO component tag
  93  * @phys_efptr: RIO device extended features pointer
  94  * @em_efptr: RIO Error Management features pointer
  95  * @dma_mask: Mask of bits of RIO address this device implements
  96  * @rswitch: Pointer to &struct rio_switch if valid for this device
  97  * @driver: Driver claiming this device
  98  * @dev: Device model device
  99  * @riores: RIO resources this device owns
 100  * @pwcback: port-write callback function for this device
 101  * @destid: Network destination ID
 102  * @prev: Previous RIO device connected to the current one
 103  */
 104 struct rio_dev {
 105         struct list_head global_list;   /* node in list of all RIO devices */
 106         struct list_head net_list;      /* node in per net list */
 107         struct rio_net *net;    /* RIO net this device resides in */
 108         u16 did;
 109         u16 vid;
 110         u32 device_rev;
 111         u16 asm_did;
 112         u16 asm_vid;
 113         u16 asm_rev;
 114         u16 efptr;
 115         u32 pef;
 116         u32 swpinfo;
 117         u32 src_ops;
 118         u32 dst_ops;
 119         u32 comp_tag;
 120         u32 phys_efptr;
 121         u32 em_efptr;
 122         u64 dma_mask;
 123         struct rio_switch *rswitch;     /* RIO switch info */
 124         struct rio_driver *driver;      /* RIO driver claiming this device */
 125         struct device dev;      /* LDM device structure */
 126         struct resource riores[RIO_MAX_DEV_RESOURCES];
 127         int (*pwcback) (struct rio_dev *rdev, union rio_pw_msg *msg, int step);
 128         u16 destid;
 129         struct rio_dev *prev;
 130 };
 131
 132 #define rio_dev_g(n) list_entry(n, struct rio_dev, global_list)
 133 #define rio_dev_f(n) list_entry(n, struct rio_dev, net_list)
 134 #define to_rio_dev(n) container_of(n, struct rio_dev, dev)
 135
 136 /**
 137  * struct rio_msg - RIO message event
 138  * @res: Mailbox resource
 139  * @mcback: Message event callback
 140  */
 141 struct rio_msg {
 142         struct resource *res;
 143         void (*mcback) (struct rio_mport * mport, void *dev_id, int mbox, int slot);
 144 };
 145
 146 /**
 147  * struct rio_dbell - RIO doorbell event
 148  * @node: Node in list of doorbell events
 149  * @res: Doorbell resource
 150  * @dinb: Doorbell event callback
 151  * @dev_id: Device specific pointer to pass on event
 152  */
 153 struct rio_dbell {
 154         struct list_head node;
 155         struct resource *res;
 156         void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16 dst, u16 info);
 157         void *dev_id;
 158 };
 159
 160 enum rio_phy_type {
 161         RIO_PHY_PARALLEL,
 162         RIO_PHY_SERIAL,
 163 };
 164
 165 /**
 166  * struct rio_mport - RIO master port info
 167  * @dbells: List of doorbell events
 168  * @node: Node in global list of master ports
 169  * @nnode: Node in network list of master ports
 170  * @iores: I/O mem resource that this master port interface owns
 171  * @riores: RIO resources that this master port interfaces owns
 172  * @inb_msg: RIO inbound message event descriptors
 173  * @outb_msg: RIO outbound message event descriptors
 174  * @host_deviceid: Host device ID associated with this master port
 175  * @ops: configuration space functions
 176  * @id: Port ID, unique among all ports
 177  * @index: Port index, unique among all port interfaces of the same type
 178  * @sys_size: RapidIO common transport system size
 179  * @phy_type: RapidIO phy type
 180  * @phys_efptr: RIO port extended features pointer
 181  * @name: Port name string
 182  * @priv: Master port private data
 183  */
 184 struct rio_mport {
 185         struct list_head dbells;        /* list of doorbell events */
 186         struct list_head node;  /* node in global list of ports */
 187         struct list_head nnode; /* node in net list of ports */
 188         struct resource iores;
 189         struct resource riores[RIO_MAX_MPORT_RESOURCES];
 190         struct rio_msg inb_msg[RIO_MAX_MBOX];
 191         struct rio_msg outb_msg[RIO_MAX_MBOX];
 192         int host_deviceid;      /* Host device ID */
 193         struct rio_ops *ops;    /* maintenance transaction functions */
 194         unsigned char id;       /* port ID, unique among all ports */
 195         unsigned char index;    /* port index, unique among all port
 196                                    interfaces of the same type */
 197         unsigned int sys_size;  /* RapidIO common transport system size.
 198                                  * 0 - Small size. 256 devices.
 199                                  * 1 - Large size, 65536 devices.
 200                                  */
 201         enum rio_phy_type phy_type;     /* RapidIO phy type */
 202         u32 phys_efptr;
 203         unsigned char name[40];
 204         void *priv;             /* Master port private data */
 205 };
 206
 207 /**
 208  * struct rio_net - RIO network info
 209  * @node: Node in global list of RIO networks
 210  * @devices: List of devices in this network
 211  * @mports: List of master ports accessing this network
 212  * @hport: Default port for accessing this network
 213  * @id: RIO network ID
 214  */
 215 struct rio_net {
 216         struct list_head node;  /* node in list of networks */
 217         struct list_head devices;       /* list of devices in this net */
 218         struct list_head mports;        /* list of ports accessing net */
 219         struct rio_mport *hport;        /* primary port for accessing net */
 220         unsigned char id;       /* RIO network ID */
 221 };
 222
 223 /* Definitions used by switch sysfs initialization callback */
 224 #define RIO_SW_SYSFS_CREATE     1       /* Create switch attributes */
 225 #define RIO_SW_SYSFS_REMOVE     0       /* Remove switch attributes */
 226
 227 /**
 228  * struct rio_switch - RIO switch info
 229  * @node: Node in global list of switches
 230  * @rdev: Associated RIO device structure
 231  * @switchid: Switch ID that is unique across a network
 232  * @hopcount: Hopcount to this switch
 233  * @destid: Associated destid in the path
 234  * @route_table: Copy of switch routing table
 235  * @port_ok: Status of each port (one bit per port) - OK=1 or UNINIT=0
 236  * @add_entry: Callback for switch-specific route add function
 237  * @get_entry: Callback for switch-specific route get function
 238  * @clr_table: Callback for switch-specific clear route table function
 239  * @set_domain: Callback for switch-specific domain setting function
 240  * @get_domain: Callback for switch-specific domain get function
 241  * @em_init: Callback for switch-specific error management initialization function
 242  * @em_handle: Callback for switch-specific error management handler function
 243  * @sw_sysfs: Callback that initializes switch-specific sysfs attributes
 244  * @nextdev: Array of per-port pointers to the next attached device
 245  */
 246 struct rio_switch {
 247         struct list_head node;
 248         struct rio_dev *rdev;
 249         u16 switchid;
 250         u16 hopcount;
 251         u16 destid;
 252         u8 *route_table;
 253         u32 port_ok;
 254         int (*add_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
 255                           u16 table, u16 route_destid, u8 route_port);
 256         int (*get_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
 257                           u16 table, u16 route_destid, u8 * route_port);
 258         int (*clr_table) (struct rio_mport *mport, u16 destid, u8 hopcount,
 259                           u16 table);
 260         int (*set_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
 261                            u8 sw_domain);
 262         int (*get_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
 263                            u8 *sw_domain);
 264         int (*em_init) (struct rio_dev *dev);
 265         int (*em_handle) (struct rio_dev *dev, u8 swport);
 266         int (*sw_sysfs) (struct rio_dev *dev, int create);
 267         struct rio_dev *nextdev[0];
 268 };
 269
 270 /* Low-level architecture-dependent routines */
 271
 272 /**
 273  * struct rio_ops - Low-level RIO configuration space operations
 274  * @lcread: Callback to perform local (master port) read of config space.
 275  * @lcwrite: Callback to perform local (master port) write of config space.
 276  * @cread: Callback to perform network read of config space.
 277  * @cwrite: Callback to perform network write of config space.
 278  * @dsend: Callback to send a doorbell message.
 279  * @pwenable: Callback to enable/disable port-write message handling.
 280  */
 281 struct rio_ops {
 282         int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
 283                         u32 *data);
 284         int (*lcwrite) (struct rio_mport *mport, int index, u32 offset, int len,
 285                         u32 data);
 286         int (*cread) (struct rio_mport *mport, int index, u16 destid,
 287                         u8 hopcount, u32 offset, int len, u32 *data);
 288         int (*cwrite) (struct rio_mport *mport, int index, u16 destid,
 289                         u8 hopcount, u32 offset, int len, u32 data);
 290         int (*dsend) (struct rio_mport *mport, int index, u16 destid, u16 data);
 291         int (*pwenable) (struct rio_mport *mport, int enable);
 292 };
 293
 294 #define RIO_RESOURCE_MEM        0x00000100
 295 #define RIO_RESOURCE_DOORBELL   0x00000200
 296 #define RIO_RESOURCE_MAILBOX    0x00000400
 297
 298 #define RIO_RESOURCE_CACHEABLE  0x00010000
 299 #define RIO_RESOURCE_PCI        0x00020000
 300
 301 #define RIO_RESOURCE_BUSY       0x80000000
 302
 303 /**
 304  * struct rio_driver - RIO driver info
 305  * @node: Node in list of drivers
 306  * @name: RIO driver name
 307  * @id_table: RIO device ids to be associated with this driver
 308  * @probe: RIO device inserted
 309  * @remove: RIO device removed
 310  * @suspend: RIO device suspended
 311  * @resume: RIO device awakened
 312  * @enable_wake: RIO device enable wake event
 313  * @driver: LDM driver struct
 314  *
 315  * Provides info on a RIO device driver for insertion/removal and
 316  * power management purposes.
 317  */
 318 struct rio_driver {
 319         struct list_head node;
 320         char *name;
 321         const struct rio_device_id *id_table;
 322         int (*probe) (struct rio_dev * dev, const struct rio_device_id * id);
 323         void (*remove) (struct rio_dev * dev);
 324         int (*suspend) (struct rio_dev * dev, u32 state);
 325         int (*resume) (struct rio_dev * dev);
 326         int (*enable_wake) (struct rio_dev * dev, u32 state, int enable);
 327         struct device_driver driver;
 328 };
 329
 330 #define to_rio_driver(drv) container_of(drv,struct rio_driver, driver)
 331
 332 /**
 333  * struct rio_device_id - RIO device identifier
 334  * @did: RIO device ID
 335  * @vid: RIO vendor ID
 336  * @asm_did: RIO assembly device ID
 337  * @asm_vid: RIO assembly vendor ID
 338  *
 339  * Identifies a RIO device based on both the device/vendor IDs and
 340  * the assembly device/vendor IDs.
 341  */
 342 struct rio_device_id {
 343         u16 did, vid;
 344         u16 asm_did, asm_vid;
 345 };
 346
 347 /**
 348  * struct rio_switch_ops - Per-switch operations
 349  * @vid: RIO vendor ID
 350  * @did: RIO device ID
 351  * @init_hook: Callback that performs switch device initialization
 352  *
 353  * Defines the operations that are necessary to initialize/control
 354  * a particular RIO switch device.
 355  */
 356 struct rio_switch_ops {
 357         u16 vid, did;
 358         int (*init_hook) (struct rio_dev *rdev, int do_enum);
 359 };
 360
 361 union rio_pw_msg {
 362         struct {
 363                 u32 comptag;    /* Component Tag CSR */
 364                 u32 errdetect;  /* Port N Error Detect CSR */
 365                 u32 is_port;    /* Implementation specific + PortID */
 366                 u32 ltlerrdet;  /* LTL Error Detect CSR */
 367                 u32 padding[12];
 368         } em;
 369         u32 raw[RIO_PW_MSG_SIZE/sizeof(u32)];
 370 };
 371
 372 /* Architecture and hardware-specific functions */
 373 extern int rio_init_mports(void);
 374 extern void rio_register_mport(struct rio_mport *);
 375 extern int rio_hw_add_outb_message(struct rio_mport *, struct rio_dev *, int,
 376                                    void *, size_t);
 377 extern int rio_hw_add_inb_buffer(struct rio_mport *, int, void *);
 378 extern void *rio_hw_get_inb_message(struct rio_mport *, int);
 379 extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
 380 extern void rio_close_inb_mbox(struct rio_mport *, int);
 381 extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
 382 extern void rio_close_outb_mbox(struct rio_mport *, int);
 383
 384 #endif                          /* LINUX_RIO_H */