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 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
  24 #include <linux/dmaengine.h>
  25 #endif
  26
  27 #define RIO_NO_HOPCOUNT         -1
  28 #define RIO_INVALID_DESTID      0xffff
  29
  30 #define RIO_MAX_MPORTS          8
  31 #define RIO_MAX_MPORT_RESOURCES 16
  32 #define RIO_MAX_DEV_RESOURCES   16
  33
  34 #define RIO_GLOBAL_TABLE        0xff    /* Indicates access of a switch's
  35                                            global routing table if it
  36                                            has multiple (or per port)
  37                                            tables */
  38
  39 #define RIO_INVALID_ROUTE       0xff    /* Indicates that a route table
  40                                            entry is invalid (no route
  41                                            exists for the device ID) */
  42
  43 #define RIO_MAX_ROUTE_ENTRIES(size)     (size ? (1 << 16) : (1 << 8))
  44 #define RIO_ANY_DESTID(size)            (size ? 0xffff : 0xff)
  45
  46 #define RIO_MAX_MBOX            4
  47 #define RIO_MAX_MSG_SIZE        0x1000
  48
  49 /*
  50  * Error values that may be returned by RIO functions.
  51  */
  52 #define RIO_SUCCESSFUL                  0x00
  53 #define RIO_BAD_SIZE                    0x81
  54
  55 /*
  56  * For RIO devices, the region numbers are assigned this way:
  57  *
  58  *      0       RapidIO outbound doorbells
  59  *      1-15    RapidIO memory regions
  60  *
  61  * For RIO master ports, the region number are assigned this way:
  62  *
  63  *      0       RapidIO inbound doorbells
  64  *      1       RapidIO inbound mailboxes
  65  *      1       RapidIO outbound mailboxes
  66  */
  67 #define RIO_DOORBELL_RESOURCE   0
  68 #define RIO_INB_MBOX_RESOURCE   1
  69 #define RIO_OUTB_MBOX_RESOURCE  2
  70
  71 #define RIO_PW_MSG_SIZE         64
  72
  73 /*
  74  * A component tag value (stored in the component tag CSR) is used as device's
  75  * unique identifier assigned during enumeration. Besides being used for
  76  * identifying switches (which do not have device ID register), it also is used
  77  * by error management notification and therefore has to be assigned
  78  * to endpoints as well.
  79  */
  80 #define RIO_CTAG_RESRVD 0xfffe0000 /* Reserved */
  81 #define RIO_CTAG_UDEVID 0x0001ffff /* Unique device identifier */
  82
  83 extern struct bus_type rio_bus_type;
  84 extern struct device rio_bus;
  85 extern struct list_head rio_devices;    /* list of all devices */
  86
  87 struct rio_mport;
  88 struct rio_dev;
  89 union rio_pw_msg;
  90
  91 /**
  92  * struct rio_switch - RIO switch info
  93  * @node: Node in global list of switches
  94  * @switchid: Switch ID that is unique across a network
  95  * @route_table: Copy of switch routing table
  96  * @port_ok: Status of each port (one bit per port) - OK=1 or UNINIT=0
  97  * @add_entry: Callback for switch-specific route add function
  98  * @get_entry: Callback for switch-specific route get function
  99  * @clr_table: Callback for switch-specific clear route table function
 100  * @set_domain: Callback for switch-specific domain setting function
 101  * @get_domain: Callback for switch-specific domain get function
 102  * @em_init: Callback for switch-specific error management init function
 103  * @em_handle: Callback for switch-specific error management handler function
 104  * @sw_sysfs: Callback that initializes switch-specific sysfs attributes
 105  * @nextdev: Array of per-port pointers to the next attached device
 106  */
 107 struct rio_switch {
 108         struct list_head node;
 109         u16 switchid;
 110         u8 *route_table;
 111         u32 port_ok;
 112         int (*add_entry) (struct rio_mport *mport, u16 destid, u8 hopcount,
 113                           u16 table, u16 route_destid, u8 route_port);
 114         int (*get_entry) (struct rio_mport *mport, u16 destid, u8 hopcount,
 115                           u16 table, u16 route_destid, u8 *route_port);
 116         int (*clr_table) (struct rio_mport *mport, u16 destid, u8 hopcount,
 117                           u16 table);
 118         int (*set_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
 119                            u8 sw_domain);
 120         int (*get_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
 121                            u8 *sw_domain);
 122         int (*em_init) (struct rio_dev *dev);
 123         int (*em_handle) (struct rio_dev *dev, u8 swport);
 124         int (*sw_sysfs) (struct rio_dev *dev, int create);
 125         struct rio_dev *nextdev[0];
 126 };
 127
 128 /**
 129  * struct rio_dev - RIO device info
 130  * @global_list: Node in list of all RIO devices
 131  * @net_list: Node in list of RIO devices in a network
 132  * @net: Network this device is a part of
 133  * @did: Device ID
 134  * @vid: Vendor ID
 135  * @device_rev: Device revision
 136  * @asm_did: Assembly device ID
 137  * @asm_vid: Assembly vendor ID
 138  * @asm_rev: Assembly revision
 139  * @efptr: Extended feature pointer
 140  * @pef: Processing element features
 141  * @swpinfo: Switch port info
 142  * @src_ops: Source operation capabilities
 143  * @dst_ops: Destination operation capabilities
 144  * @comp_tag: RIO component tag
 145  * @phys_efptr: RIO device extended features pointer
 146  * @em_efptr: RIO Error Management features pointer
 147  * @dma_mask: Mask of bits of RIO address this device implements
 148  * @driver: Driver claiming this device
 149  * @dev: Device model device
 150  * @riores: RIO resources this device owns
 151  * @pwcback: port-write callback function for this device
 152  * @destid: Network destination ID (or associated destid for switch)
 153  * @hopcount: Hopcount to this device
 154  * @prev: Previous RIO device connected to the current one
 155  * @rswitch: struct rio_switch (if valid for this device)
 156  */
 157 struct rio_dev {
 158         struct list_head global_list;   /* node in list of all RIO devices */
 159         struct list_head net_list;      /* node in per net list */
 160         struct rio_net *net;    /* RIO net this device resides in */
 161         u16 did;
 162         u16 vid;
 163         u32 device_rev;
 164         u16 asm_did;
 165         u16 asm_vid;
 166         u16 asm_rev;
 167         u16 efptr;
 168         u32 pef;
 169         u32 swpinfo;
 170         u32 src_ops;
 171         u32 dst_ops;
 172         u32 comp_tag;
 173         u32 phys_efptr;
 174         u32 em_efptr;
 175         u64 dma_mask;
 176         struct rio_driver *driver;      /* RIO driver claiming this device */
 177         struct device dev;      /* LDM device structure */
 178         struct resource riores[RIO_MAX_DEV_RESOURCES];
 179         int (*pwcback) (struct rio_dev *rdev, union rio_pw_msg *msg, int step);
 180         u16 destid;
 181         u8 hopcount;
 182         struct rio_dev *prev;
 183         struct rio_switch rswitch[0];   /* RIO switch info */
 184 };
 185
 186 #define rio_dev_g(n) list_entry(n, struct rio_dev, global_list)
 187 #define rio_dev_f(n) list_entry(n, struct rio_dev, net_list)
 188 #define to_rio_dev(n) container_of(n, struct rio_dev, dev)
 189 #define sw_to_rio_dev(n) container_of(n, struct rio_dev, rswitch[0])
 190
 191 /**
 192  * struct rio_msg - RIO message event
 193  * @res: Mailbox resource
 194  * @mcback: Message event callback
 195  */
 196 struct rio_msg {
 197         struct resource *res;
 198         void (*mcback) (struct rio_mport * mport, void *dev_id, int mbox, int slot);
 199 };
 200
 201 /**
 202  * struct rio_dbell - RIO doorbell event
 203  * @node: Node in list of doorbell events
 204  * @res: Doorbell resource
 205  * @dinb: Doorbell event callback
 206  * @dev_id: Device specific pointer to pass on event
 207  */
 208 struct rio_dbell {
 209         struct list_head node;
 210         struct resource *res;
 211         void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16 dst, u16 info);
 212         void *dev_id;
 213 };
 214
 215 enum rio_phy_type {
 216         RIO_PHY_PARALLEL,
 217         RIO_PHY_SERIAL,
 218 };
 219
 220 /**
 221  * struct rio_mport - RIO master port info
 222  * @dbells: List of doorbell events
 223  * @node: Node in global list of master ports
 224  * @nnode: Node in network list of master ports
 225  * @iores: I/O mem resource that this master port interface owns
 226  * @riores: RIO resources that this master port interfaces owns
 227  * @inb_msg: RIO inbound message event descriptors
 228  * @outb_msg: RIO outbound message event descriptors
 229  * @host_deviceid: Host device ID associated with this master port
 230  * @ops: configuration space functions
 231  * @id: Port ID, unique among all ports
 232  * @index: Port index, unique among all port interfaces of the same type
 233  * @sys_size: RapidIO common transport system size
 234  * @phy_type: RapidIO phy type
 235  * @phys_efptr: RIO port extended features pointer
 236  * @name: Port name string
 237  * @priv: Master port private data
 238  */
 239 struct rio_mport {
 240         struct list_head dbells;        /* list of doorbell events */
 241         struct list_head node;  /* node in global list of ports */
 242         struct list_head nnode; /* node in net list of ports */
 243         struct resource iores;
 244         struct resource riores[RIO_MAX_MPORT_RESOURCES];
 245         struct rio_msg inb_msg[RIO_MAX_MBOX];
 246         struct rio_msg outb_msg[RIO_MAX_MBOX];
 247         int host_deviceid;      /* Host device ID */
 248         struct rio_ops *ops;    /* low-level architecture-dependent routines */
 249         unsigned char id;       /* port ID, unique among all ports */
 250         unsigned char index;    /* port index, unique among all port
 251                                    interfaces of the same type */
 252         unsigned int sys_size;  /* RapidIO common transport system size.
 253                                  * 0 - Small size. 256 devices.
 254                                  * 1 - Large size, 65536 devices.
 255                                  */
 256         enum rio_phy_type phy_type;     /* RapidIO phy type */
 257         u32 phys_efptr;
 258         unsigned char name[40];
 259         void *priv;             /* Master port private data */
 260 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
 261         struct dma_device       dma;
 262 #endif
 263 };
 264
 265 /**
 266  * struct rio_net - RIO network info
 267  * @node: Node in global list of RIO networks
 268  * @devices: List of devices in this network
 269  * @mports: List of master ports accessing this network
 270  * @hport: Default port for accessing this network
 271  * @id: RIO network ID
 272  */
 273 struct rio_net {
 274         struct list_head node;  /* node in list of networks */
 275         struct list_head devices;       /* list of devices in this net */
 276         struct list_head mports;        /* list of ports accessing net */
 277         struct rio_mport *hport;        /* primary port for accessing net */
 278         unsigned char id;       /* RIO network ID */
 279 };
 280
 281 /* Definitions used by switch sysfs initialization callback */
 282 #define RIO_SW_SYSFS_CREATE     1       /* Create switch attributes */
 283 #define RIO_SW_SYSFS_REMOVE     0       /* Remove switch attributes */
 284
 285 /* Low-level architecture-dependent routines */
 286
 287 /**
 288  * struct rio_ops - Low-level RIO configuration space operations
 289  * @lcread: Callback to perform local (master port) read of config space.
 290  * @lcwrite: Callback to perform local (master port) write of config space.
 291  * @cread: Callback to perform network read of config space.
 292  * @cwrite: Callback to perform network write of config space.
 293  * @dsend: Callback to send a doorbell message.
 294  * @pwenable: Callback to enable/disable port-write message handling.
 295  * @open_outb_mbox: Callback to initialize outbound mailbox.
 296  * @close_outb_mbox: Callback to shut down outbound mailbox.
 297  * @open_inb_mbox: Callback to initialize inbound mailbox.
 298  * @close_inb_mbox: Callback to shut down inbound mailbox.
 299  * @add_outb_message: Callback to add a message to an outbound mailbox queue.
 300  * @add_inb_buffer: Callback to add a buffer to an inbound mailbox queue.
 301  * @get_inb_message: Callback to get a message from an inbound mailbox queue.
 302  */
 303 struct rio_ops {
 304         int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
 305                         u32 *data);
 306         int (*lcwrite) (struct rio_mport *mport, int index, u32 offset, int len,
 307                         u32 data);
 308         int (*cread) (struct rio_mport *mport, int index, u16 destid,
 309                         u8 hopcount, u32 offset, int len, u32 *data);
 310         int (*cwrite) (struct rio_mport *mport, int index, u16 destid,
 311                         u8 hopcount, u32 offset, int len, u32 data);
 312         int (*dsend) (struct rio_mport *mport, int index, u16 destid, u16 data);
 313         int (*pwenable) (struct rio_mport *mport, int enable);
 314         int (*open_outb_mbox)(struct rio_mport *mport, void *dev_id,
 315                               int mbox, int entries);
 316         void (*close_outb_mbox)(struct rio_mport *mport, int mbox);
 317         int  (*open_inb_mbox)(struct rio_mport *mport, void *dev_id,
 318                              int mbox, int entries);
 319         void (*close_inb_mbox)(struct rio_mport *mport, int mbox);
 320         int  (*add_outb_message)(struct rio_mport *mport, struct rio_dev *rdev,
 321                                  int mbox, void *buffer, size_t len);
 322         int (*add_inb_buffer)(struct rio_mport *mport, int mbox, void *buf);
 323         void *(*get_inb_message)(struct rio_mport *mport, int mbox);
 324 };
 325
 326 #define RIO_RESOURCE_MEM        0x00000100
 327 #define RIO_RESOURCE_DOORBELL   0x00000200
 328 #define RIO_RESOURCE_MAILBOX    0x00000400
 329
 330 #define RIO_RESOURCE_CACHEABLE  0x00010000
 331 #define RIO_RESOURCE_PCI        0x00020000
 332
 333 #define RIO_RESOURCE_BUSY       0x80000000
 334
 335 /**
 336  * struct rio_driver - RIO driver info
 337  * @node: Node in list of drivers
 338  * @name: RIO driver name
 339  * @id_table: RIO device ids to be associated with this driver
 340  * @probe: RIO device inserted
 341  * @remove: RIO device removed
 342  * @suspend: RIO device suspended
 343  * @resume: RIO device awakened
 344  * @enable_wake: RIO device enable wake event
 345  * @driver: LDM driver struct
 346  *
 347  * Provides info on a RIO device driver for insertion/removal and
 348  * power management purposes.
 349  */
 350 struct rio_driver {
 351         struct list_head node;
 352         char *name;
 353         const struct rio_device_id *id_table;
 354         int (*probe) (struct rio_dev * dev, const struct rio_device_id * id);
 355         void (*remove) (struct rio_dev * dev);
 356         int (*suspend) (struct rio_dev * dev, u32 state);
 357         int (*resume) (struct rio_dev * dev);
 358         int (*enable_wake) (struct rio_dev * dev, u32 state, int enable);
 359         struct device_driver driver;
 360 };
 361
 362 #define to_rio_driver(drv) container_of(drv,struct rio_driver, driver)
 363
 364 /**
 365  * struct rio_device_id - RIO device identifier
 366  * @did: RIO device ID
 367  * @vid: RIO vendor ID
 368  * @asm_did: RIO assembly device ID
 369  * @asm_vid: RIO assembly vendor ID
 370  *
 371  * Identifies a RIO device based on both the device/vendor IDs and
 372  * the assembly device/vendor IDs.
 373  */
 374 struct rio_device_id {
 375         u16 did, vid;
 376         u16 asm_did, asm_vid;
 377 };
 378
 379 /**
 380  * struct rio_switch_ops - Per-switch operations
 381  * @vid: RIO vendor ID
 382  * @did: RIO device ID
 383  * @init_hook: Callback that performs switch device initialization
 384  *
 385  * Defines the operations that are necessary to initialize/control
 386  * a particular RIO switch device.
 387  */
 388 struct rio_switch_ops {
 389         u16 vid, did;
 390         int (*init_hook) (struct rio_dev *rdev, int do_enum);
 391 };
 392
 393 union rio_pw_msg {
 394         struct {
 395                 u32 comptag;    /* Component Tag CSR */
 396                 u32 errdetect;  /* Port N Error Detect CSR */
 397                 u32 is_port;    /* Implementation specific + PortID */
 398                 u32 ltlerrdet;  /* LTL Error Detect CSR */
 399                 u32 padding[12];
 400         } em;
 401         u32 raw[RIO_PW_MSG_SIZE/sizeof(u32)];
 402 };
 403
 404 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
 405
 406 /**
 407  * enum rio_write_type - RIO write transaction types used in DMA transfers
 408  *
 409  * Note: RapidIO specification defines write (NWRITE) and
 410  * write-with-response (NWRITE_R) data transfer operations.
 411  * Existing DMA controllers that service RapidIO may use one of these operations
 412  * for entire data transfer or their combination with only the last data packet
 413  * requires response.
 414  */
 415 enum rio_write_type {
 416         RDW_DEFAULT,            /* default method used by DMA driver */
 417         RDW_ALL_NWRITE,         /* all packets use NWRITE */
 418         RDW_ALL_NWRITE_R,       /* all packets use NWRITE_R */
 419         RDW_LAST_NWRITE_R,      /* last packet uses NWRITE_R, others - NWRITE */
 420 };
 421
 422 struct rio_dma_ext {
 423         u16 destid;
 424         u64 rio_addr;   /* low 64-bits of 66-bit RapidIO address */
 425         u8  rio_addr_u;  /* upper 2-bits of 66-bit RapidIO address */
 426         enum rio_write_type wr_type; /* preferred RIO write operation type */
 427 };
 428
 429 struct rio_dma_data {
 430         /* Local data (as scatterlist) */
 431         struct scatterlist      *sg;    /* I/O scatter list */
 432         unsigned int            sg_len; /* size of scatter list */
 433         /* Remote device address (flat buffer) */
 434         u64 rio_addr;   /* low 64-bits of 66-bit RapidIO address */
 435         u8  rio_addr_u;  /* upper 2-bits of 66-bit RapidIO address */
 436         enum rio_write_type wr_type; /* preferred RIO write operation type */
 437 };
 438
 439 static inline struct rio_mport *dma_to_mport(struct dma_device *ddev)
 440 {
 441         return container_of(ddev, struct rio_mport, dma);
 442 }
 443 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
 444
 445 /* Architecture and hardware-specific functions */
 446 extern int rio_register_mport(struct rio_mport *);
 447 extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
 448 extern void rio_close_inb_mbox(struct rio_mport *, int);
 449 extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
 450 extern void rio_close_outb_mbox(struct rio_mport *, int);
 451
 452 #endif                          /* LINUX_RIO_H */