linux/include/linux/rio_drv.h
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   1/*
   2 * RapidIO driver services
   3 *
   4 * Copyright 2005 MontaVista Software, Inc.
   5 * Matt Porter <mporter@kernel.crashing.org>
   6 *
   7 * This program is free software; you can redistribute  it and/or modify it
   8 * under  the terms of  the GNU General  Public License as published by the
   9 * Free Software Foundation;  either version 2 of the  License, or (at your
  10 * option) any later version.
  11 */
  12
  13#ifndef LINUX_RIO_DRV_H
  14#define LINUX_RIO_DRV_H
  15
  16#include <linux/types.h>
  17#include <linux/ioport.h>
  18#include <linux/list.h>
  19#include <linux/errno.h>
  20#include <linux/string.h>
  21#include <linux/rio.h>
  22
  23extern int __rio_local_read_config_32(struct rio_mport *port, u32 offset,
  24                                      u32 * data);
  25extern int __rio_local_write_config_32(struct rio_mport *port, u32 offset,
  26                                       u32 data);
  27extern int __rio_local_read_config_16(struct rio_mport *port, u32 offset,
  28                                      u16 * data);
  29extern int __rio_local_write_config_16(struct rio_mport *port, u32 offset,
  30                                       u16 data);
  31extern int __rio_local_read_config_8(struct rio_mport *port, u32 offset,
  32                                     u8 * data);
  33extern int __rio_local_write_config_8(struct rio_mport *port, u32 offset,
  34                                      u8 data);
  35
  36extern int rio_mport_read_config_32(struct rio_mport *port, u16 destid,
  37                                    u8 hopcount, u32 offset, u32 * data);
  38extern int rio_mport_write_config_32(struct rio_mport *port, u16 destid,
  39                                     u8 hopcount, u32 offset, u32 data);
  40extern int rio_mport_read_config_16(struct rio_mport *port, u16 destid,
  41                                    u8 hopcount, u32 offset, u16 * data);
  42extern int rio_mport_write_config_16(struct rio_mport *port, u16 destid,
  43                                     u8 hopcount, u32 offset, u16 data);
  44extern int rio_mport_read_config_8(struct rio_mport *port, u16 destid,
  45                                   u8 hopcount, u32 offset, u8 * data);
  46extern int rio_mport_write_config_8(struct rio_mport *port, u16 destid,
  47                                    u8 hopcount, u32 offset, u8 data);
  48
  49/**
  50 * rio_local_read_config_32 - Read 32 bits from local configuration space
  51 * @port: Master port
  52 * @offset: Offset into local configuration space
  53 * @data: Pointer to read data into
  54 *
  55 * Reads 32 bits of data from the specified offset within the local
  56 * device's configuration space.
  57 */
  58static inline int rio_local_read_config_32(struct rio_mport *port, u32 offset,
  59                                           u32 * data)
  60{
  61        return __rio_local_read_config_32(port, offset, data);
  62}
  63
  64/**
  65 * rio_local_write_config_32 - Write 32 bits to local configuration space
  66 * @port: Master port
  67 * @offset: Offset into local configuration space
  68 * @data: Data to be written
  69 *
  70 * Writes 32 bits of data to the specified offset within the local
  71 * device's configuration space.
  72 */
  73static inline int rio_local_write_config_32(struct rio_mport *port, u32 offset,
  74                                            u32 data)
  75{
  76        return __rio_local_write_config_32(port, offset, data);
  77}
  78
  79/**
  80 * rio_local_read_config_16 - Read 16 bits from local configuration space
  81 * @port: Master port
  82 * @offset: Offset into local configuration space
  83 * @data: Pointer to read data into
  84 *
  85 * Reads 16 bits of data from the specified offset within the local
  86 * device's configuration space.
  87 */
  88static inline int rio_local_read_config_16(struct rio_mport *port, u32 offset,
  89                                           u16 * data)
  90{
  91        return __rio_local_read_config_16(port, offset, data);
  92}
  93
  94/**
  95 * rio_local_write_config_16 - Write 16 bits to local configuration space
  96 * @port: Master port
  97 * @offset: Offset into local configuration space
  98 * @data: Data to be written
  99 *
 100 * Writes 16 bits of data to the specified offset within the local
 101 * device's configuration space.
 102 */
 103
 104static inline int rio_local_write_config_16(struct rio_mport *port, u32 offset,
 105                                            u16 data)
 106{
 107        return __rio_local_write_config_16(port, offset, data);
 108}
 109
 110/**
 111 * rio_local_read_config_8 - Read 8 bits from local configuration space
 112 * @port: Master port
 113 * @offset: Offset into local configuration space
 114 * @data: Pointer to read data into
 115 *
 116 * Reads 8 bits of data from the specified offset within the local
 117 * device's configuration space.
 118 */
 119static inline int rio_local_read_config_8(struct rio_mport *port, u32 offset,
 120                                          u8 * data)
 121{
 122        return __rio_local_read_config_8(port, offset, data);
 123}
 124
 125/**
 126 * rio_local_write_config_8 - Write 8 bits to local configuration space
 127 * @port: Master port
 128 * @offset: Offset into local configuration space
 129 * @data: Data to be written
 130 *
 131 * Writes 8 bits of data to the specified offset within the local
 132 * device's configuration space.
 133 */
 134static inline int rio_local_write_config_8(struct rio_mport *port, u32 offset,
 135                                           u8 data)
 136{
 137        return __rio_local_write_config_8(port, offset, data);
 138}
 139
 140/**
 141 * rio_read_config_32 - Read 32 bits from configuration space
 142 * @rdev: RIO device
 143 * @offset: Offset into device configuration space
 144 * @data: Pointer to read data into
 145 *
 146 * Reads 32 bits of data from the specified offset within the
 147 * RIO device's configuration space.
 148 */
 149static inline int rio_read_config_32(struct rio_dev *rdev, u32 offset,
 150                                     u32 * data)
 151{
 152        return rio_mport_read_config_32(rdev->net->hport, rdev->destid,
 153                                        rdev->hopcount, offset, data);
 154};
 155
 156/**
 157 * rio_write_config_32 - Write 32 bits to configuration space
 158 * @rdev: RIO device
 159 * @offset: Offset into device configuration space
 160 * @data: Data to be written
 161 *
 162 * Writes 32 bits of data to the specified offset within the
 163 * RIO device's configuration space.
 164 */
 165static inline int rio_write_config_32(struct rio_dev *rdev, u32 offset,
 166                                      u32 data)
 167{
 168        return rio_mport_write_config_32(rdev->net->hport, rdev->destid,
 169                                         rdev->hopcount, offset, data);
 170};
 171
 172/**
 173 * rio_read_config_16 - Read 16 bits from configuration space
 174 * @rdev: RIO device
 175 * @offset: Offset into device configuration space
 176 * @data: Pointer to read data into
 177 *
 178 * Reads 16 bits of data from the specified offset within the
 179 * RIO device's configuration space.
 180 */
 181static inline int rio_read_config_16(struct rio_dev *rdev, u32 offset,
 182                                     u16 * data)
 183{
 184        return rio_mport_read_config_16(rdev->net->hport, rdev->destid,
 185                                        rdev->hopcount, offset, data);
 186};
 187
 188/**
 189 * rio_write_config_16 - Write 16 bits to configuration space
 190 * @rdev: RIO device
 191 * @offset: Offset into device configuration space
 192 * @data: Data to be written
 193 *
 194 * Writes 16 bits of data to the specified offset within the
 195 * RIO device's configuration space.
 196 */
 197static inline int rio_write_config_16(struct rio_dev *rdev, u32 offset,
 198                                      u16 data)
 199{
 200        return rio_mport_write_config_16(rdev->net->hport, rdev->destid,
 201                                         rdev->hopcount, offset, data);
 202};
 203
 204/**
 205 * rio_read_config_8 - Read 8 bits from configuration space
 206 * @rdev: RIO device
 207 * @offset: Offset into device configuration space
 208 * @data: Pointer to read data into
 209 *
 210 * Reads 8 bits of data from the specified offset within the
 211 * RIO device's configuration space.
 212 */
 213static inline int rio_read_config_8(struct rio_dev *rdev, u32 offset, u8 * data)
 214{
 215        return rio_mport_read_config_8(rdev->net->hport, rdev->destid,
 216                                       rdev->hopcount, offset, data);
 217};
 218
 219/**
 220 * rio_write_config_8 - Write 8 bits to configuration space
 221 * @rdev: RIO device
 222 * @offset: Offset into device configuration space
 223 * @data: Data to be written
 224 *
 225 * Writes 8 bits of data to the specified offset within the
 226 * RIO device's configuration space.
 227 */
 228static inline int rio_write_config_8(struct rio_dev *rdev, u32 offset, u8 data)
 229{
 230        return rio_mport_write_config_8(rdev->net->hport, rdev->destid,
 231                                        rdev->hopcount, offset, data);
 232};
 233
 234extern int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid,
 235                                   u16 data);
 236
 237/**
 238 * rio_send_doorbell - Send a doorbell message to a device
 239 * @rdev: RIO device
 240 * @data: Doorbell message data
 241 *
 242 * Send a doorbell message to a RIO device. The doorbell message
 243 * has a 16-bit info field provided by the @data argument.
 244 */
 245static inline int rio_send_doorbell(struct rio_dev *rdev, u16 data)
 246{
 247        return rio_mport_send_doorbell(rdev->net->hport, rdev->destid, data);
 248};
 249
 250/**
 251 * rio_init_mbox_res - Initialize a RIO mailbox resource
 252 * @res: resource struct
 253 * @start: start of mailbox range
 254 * @end: end of mailbox range
 255 *
 256 * This function is used to initialize the fields of a resource
 257 * for use as a mailbox resource.  It initializes a range of
 258 * mailboxes using the start and end arguments.
 259 */
 260static inline void rio_init_mbox_res(struct resource *res, int start, int end)
 261{
 262        memset(res, 0, sizeof(struct resource));
 263        res->start = start;
 264        res->end = end;
 265        res->flags = RIO_RESOURCE_MAILBOX;
 266}
 267
 268/**
 269 * rio_init_dbell_res - Initialize a RIO doorbell resource
 270 * @res: resource struct
 271 * @start: start of doorbell range
 272 * @end: end of doorbell range
 273 *
 274 * This function is used to initialize the fields of a resource
 275 * for use as a doorbell resource.  It initializes a range of
 276 * doorbell messages using the start and end arguments.
 277 */
 278static inline void rio_init_dbell_res(struct resource *res, u16 start, u16 end)
 279{
 280        memset(res, 0, sizeof(struct resource));
 281        res->start = start;
 282        res->end = end;
 283        res->flags = RIO_RESOURCE_DOORBELL;
 284}
 285
 286/**
 287 * RIO_DEVICE - macro used to describe a specific RIO device
 288 * @dev: the 16 bit RIO device ID
 289 * @ven: the 16 bit RIO vendor ID
 290 *
 291 * This macro is used to create a struct rio_device_id that matches a
 292 * specific device.  The assembly vendor and assembly device fields
 293 * will be set to %RIO_ANY_ID.
 294 */
 295#define RIO_DEVICE(dev,ven) \
 296        .did = (dev), .vid = (ven), \
 297        .asm_did = RIO_ANY_ID, .asm_vid = RIO_ANY_ID
 298
 299/* Mailbox management */
 300extern int rio_request_outb_mbox(struct rio_mport *, void *, int, int,
 301                                 void (*)(struct rio_mport *, void *,int, int));
 302extern int rio_release_outb_mbox(struct rio_mport *, int);
 303
 304/**
 305 * rio_add_outb_message - Add RIO message to an outbound mailbox queue
 306 * @mport: RIO master port containing the outbound queue
 307 * @rdev: RIO device the message is be sent to
 308 * @mbox: The outbound mailbox queue
 309 * @buffer: Pointer to the message buffer
 310 * @len: Length of the message buffer
 311 *
 312 * Adds a RIO message buffer to an outbound mailbox queue for
 313 * transmission. Returns 0 on success.
 314 */
 315static inline int rio_add_outb_message(struct rio_mport *mport,
 316                                       struct rio_dev *rdev, int mbox,
 317                                       void *buffer, size_t len)
 318{
 319        return mport->ops->add_outb_message(mport, rdev, mbox,
 320                                                   buffer, len);
 321}
 322
 323extern int rio_request_inb_mbox(struct rio_mport *, void *, int, int,
 324                                void (*)(struct rio_mport *, void *, int, int));
 325extern int rio_release_inb_mbox(struct rio_mport *, int);
 326
 327/**
 328 * rio_add_inb_buffer - Add buffer to an inbound mailbox queue
 329 * @mport: Master port containing the inbound mailbox
 330 * @mbox: The inbound mailbox number
 331 * @buffer: Pointer to the message buffer
 332 *
 333 * Adds a buffer to an inbound mailbox queue for reception. Returns
 334 * 0 on success.
 335 */
 336static inline int rio_add_inb_buffer(struct rio_mport *mport, int mbox,
 337                                     void *buffer)
 338{
 339        return mport->ops->add_inb_buffer(mport, mbox, buffer);
 340}
 341
 342/**
 343 * rio_get_inb_message - Get A RIO message from an inbound mailbox queue
 344 * @mport: Master port containing the inbound mailbox
 345 * @mbox: The inbound mailbox number
 346 *
 347 * Get a RIO message from an inbound mailbox queue. Returns 0 on success.
 348 */
 349static inline void *rio_get_inb_message(struct rio_mport *mport, int mbox)
 350{
 351        return mport->ops->get_inb_message(mport, mbox);
 352}
 353
 354/* Doorbell management */
 355extern int rio_request_inb_dbell(struct rio_mport *, void *, u16, u16,
 356                                 void (*)(struct rio_mport *, void *, u16, u16, u16));
 357extern int rio_release_inb_dbell(struct rio_mport *, u16, u16);
 358extern struct resource *rio_request_outb_dbell(struct rio_dev *, u16, u16);
 359extern int rio_release_outb_dbell(struct rio_dev *, struct resource *);
 360
 361/* Memory region management */
 362int rio_claim_resource(struct rio_dev *, int);
 363int rio_request_regions(struct rio_dev *, char *);
 364void rio_release_regions(struct rio_dev *);
 365int rio_request_region(struct rio_dev *, int, char *);
 366void rio_release_region(struct rio_dev *, int);
 367
 368/* Memory mapping functions */
 369extern int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
 370                        u64 rbase, u32 size, u32 rflags);
 371extern void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart);
 372
 373/* Port-Write management */
 374extern int rio_request_inb_pwrite(struct rio_dev *,
 375                        int (*)(struct rio_dev *, union rio_pw_msg*, int));
 376extern int rio_release_inb_pwrite(struct rio_dev *);
 377extern int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg);
 378
 379/* LDM support */
 380int rio_register_driver(struct rio_driver *);
 381void rio_unregister_driver(struct rio_driver *);
 382struct rio_dev *rio_dev_get(struct rio_dev *);
 383void rio_dev_put(struct rio_dev *);
 384
 385#ifdef CONFIG_RAPIDIO_DMA_ENGINE
 386extern struct dma_chan *rio_request_dma(struct rio_dev *rdev);
 387extern void rio_release_dma(struct dma_chan *dchan);
 388extern struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(
 389                struct rio_dev *rdev, struct dma_chan *dchan,
 390                struct rio_dma_data *data,
 391                enum dma_transfer_direction direction, unsigned long flags);
 392#endif
 393
 394/**
 395 * rio_name - Get the unique RIO device identifier
 396 * @rdev: RIO device
 397 *
 398 * Get the unique RIO device identifier. Returns the device
 399 * identifier string.
 400 */
 401static inline const char *rio_name(struct rio_dev *rdev)
 402{
 403        return dev_name(&rdev->dev);
 404}
 405
 406/**
 407 * rio_get_drvdata - Get RIO driver specific data
 408 * @rdev: RIO device
 409 *
 410 * Get RIO driver specific data. Returns a pointer to the
 411 * driver specific data.
 412 */
 413static inline void *rio_get_drvdata(struct rio_dev *rdev)
 414{
 415        return dev_get_drvdata(&rdev->dev);
 416}
 417
 418/**
 419 * rio_set_drvdata - Set RIO driver specific data
 420 * @rdev: RIO device
 421 * @data: Pointer to driver specific data
 422 *
 423 * Set RIO driver specific data. device struct driver data pointer
 424 * is set to the @data argument.
 425 */
 426static inline void rio_set_drvdata(struct rio_dev *rdev, void *data)
 427{
 428        dev_set_drvdata(&rdev->dev, data);
 429}
 430
 431/* Misc driver helpers */
 432extern u16 rio_local_get_device_id(struct rio_mport *port);
 433extern struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from);
 434extern struct rio_dev *rio_get_asm(u16 vid, u16 did, u16 asm_vid, u16 asm_did,
 435                                   struct rio_dev *from);
 436
 437#endif                          /* LINUX_RIO_DRV_H */
 438
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