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