include/linux/rio_drv.h

   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
  23 extern int __rio_local_read_config_32(struct rio_mport *port, u32 offset,
  24                                       u32 * data);
  25 extern int __rio_local_write_config_32(struct rio_mport *port, u32 offset,
  26                                        u32 data);
  27 extern int __rio_local_read_config_16(struct rio_mport *port, u32 offset,
  28                                       u16 * data);
  29 extern int __rio_local_write_config_16(struct rio_mport *port, u32 offset,
  30                                        u16 data);
  31 extern int __rio_local_read_config_8(struct rio_mport *port, u32 offset,
  32                                      u8 * data);
  33 extern int __rio_local_write_config_8(struct rio_mport *port, u32 offset,
  34                                       u8 data);
  35
  36 extern int rio_mport_read_config_32(struct rio_mport *port, u16 destid,
  37                                     u8 hopcount, u32 offset, u32 * data);
  38 extern int rio_mport_write_config_32(struct rio_mport *port, u16 destid,
  39                                      u8 hopcount, u32 offset, u32 data);
  40 extern int rio_mport_read_config_16(struct rio_mport *port, u16 destid,
  41                                     u8 hopcount, u32 offset, u16 * data);
  42 extern int rio_mport_write_config_16(struct rio_mport *port, u16 destid,
  43                                      u8 hopcount, u32 offset, u16 data);
  44 extern int rio_mport_read_config_8(struct rio_mport *port, u16 destid,
  45                                    u8 hopcount, u32 offset, u8 * data);
  46 extern 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  */
  58 static 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  */
  73 static 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  */
  88 static 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
 104 static 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  */
 119 static 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  */
 134 static 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  */
 149 static 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  */
 165 static 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  */
 181 static 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  */
 197 static 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  */
 213 static 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  */
 228 static 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
 234 extern 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  */
 245 static 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  */
 260 static 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  */
 278 static 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 */
 300 extern int rio_request_outb_mbox(struct rio_mport *, void *, int, int,
 301                                  void (*)(struct rio_mport *, void *,int, int));
 302 extern 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  */
 315 static 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
 323 extern int rio_request_inb_mbox(struct rio_mport *, void *, int, int,
 324                                 void (*)(struct rio_mport *, void *, int, int));
 325 extern 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  */
 336 static 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  */
 349 static 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 */
 355 extern int rio_request_inb_dbell(struct rio_mport *, void *, u16, u16,
 356                                  void (*)(struct rio_mport *, void *, u16, u16, u16));
 357 extern int rio_release_inb_dbell(struct rio_mport *, u16, u16);
 358 extern struct resource *rio_request_outb_dbell(struct rio_dev *, u16, u16);
 359 extern int rio_release_outb_dbell(struct rio_dev *, struct resource *);
 360
 361 /* Memory region management */
 362 int rio_claim_resource(struct rio_dev *, int);
 363 int rio_request_regions(struct rio_dev *, char *);
 364 void rio_release_regions(struct rio_dev *);
 365 int rio_request_region(struct rio_dev *, int, char *);
 366 void rio_release_region(struct rio_dev *, int);
 367
 368 /* Memory mapping functions */
 369 extern int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
 370                         u64 rbase, u32 size, u32 rflags);
 371 extern void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart);
 372 extern int rio_map_outb_region(struct rio_mport *mport, u16 destid, u64 rbase,
 373                         u32 size, u32 rflags, dma_addr_t *local);
 374 extern void rio_unmap_outb_region(struct rio_mport *mport,
 375                                   u16 destid, u64 rstart);
 376
 377 /* Port-Write management */
 378 extern int rio_request_inb_pwrite(struct rio_dev *,
 379                         int (*)(struct rio_dev *, union rio_pw_msg*, int));
 380 extern int rio_release_inb_pwrite(struct rio_dev *);
 381 extern int rio_add_mport_pw_handler(struct rio_mport *mport, void *dev_id,
 382                         int (*pwcback)(struct rio_mport *mport, void *dev_id,
 383                         union rio_pw_msg *msg, int step));
 384 extern int rio_del_mport_pw_handler(struct rio_mport *mport, void *dev_id,
 385                         int (*pwcback)(struct rio_mport *mport, void *dev_id,
 386                         union rio_pw_msg *msg, int step));
 387 extern int rio_inb_pwrite_handler(struct rio_mport *mport,
 388                                   union rio_pw_msg *pw_msg);
 389 extern void rio_pw_enable(struct rio_mport *mport, int enable);
 390
 391 /* LDM support */
 392 int rio_register_driver(struct rio_driver *);
 393 void rio_unregister_driver(struct rio_driver *);
 394 struct rio_dev *rio_dev_get(struct rio_dev *);
 395 void rio_dev_put(struct rio_dev *);
 396
 397 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
 398 extern struct dma_chan *rio_request_dma(struct rio_dev *rdev);
 399 extern struct dma_chan *rio_request_mport_dma(struct rio_mport *mport);
 400 extern void rio_release_dma(struct dma_chan *dchan);
 401 extern struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(
 402                 struct rio_dev *rdev, struct dma_chan *dchan,
 403                 struct rio_dma_data *data,
 404                 enum dma_transfer_direction direction, unsigned long flags);
 405 extern struct dma_async_tx_descriptor *rio_dma_prep_xfer(
 406                 struct dma_chan *dchan, u16 destid,
 407                 struct rio_dma_data *data,
 408                 enum dma_transfer_direction direction, unsigned long flags);
 409 #endif
 410
 411 /**
 412  * rio_name - Get the unique RIO device identifier
 413  * @rdev: RIO device
 414  *
 415  * Get the unique RIO device identifier. Returns the device
 416  * identifier string.
 417  */
 418 static inline const char *rio_name(struct rio_dev *rdev)
 419 {
 420         return dev_name(&rdev->dev);
 421 }
 422
 423 /**
 424  * rio_get_drvdata - Get RIO driver specific data
 425  * @rdev: RIO device
 426  *
 427  * Get RIO driver specific data. Returns a pointer to the
 428  * driver specific data.
 429  */
 430 static inline void *rio_get_drvdata(struct rio_dev *rdev)
 431 {
 432         return dev_get_drvdata(&rdev->dev);
 433 }
 434
 435 /**
 436  * rio_set_drvdata - Set RIO driver specific data
 437  * @rdev: RIO device
 438  * @data: Pointer to driver specific data
 439  *
 440  * Set RIO driver specific data. device struct driver data pointer
 441  * is set to the @data argument.
 442  */
 443 static inline void rio_set_drvdata(struct rio_dev *rdev, void *data)
 444 {
 445         dev_set_drvdata(&rdev->dev, data);
 446 }
 447
 448 /* Misc driver helpers */
 449 extern u16 rio_local_get_device_id(struct rio_mport *port);
 450 extern void rio_local_set_device_id(struct rio_mport *port, u16 did);
 451 extern struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from);
 452 extern struct rio_dev *rio_get_asm(u16 vid, u16 did, u16 asm_vid, u16 asm_did,
 453                                    struct rio_dev *from);
 454 extern int rio_init_mports(void);
 455
 456 #endif                          /* LINUX_RIO_DRV_H */