text: /*
   * RapidIO driver services
   *
   * Copyright 2005 MontaVista Software, Inc.
   * Matt Porter <mporter@kernel.crashing.org>
   *
   * This program is free software; you can redistribute  it and/or modify it
   * under  the terms of  the GNU General  Public License as published by the
   * Free Software Foundation;  either version 2 of the  License, or (at your
   * option) any later version.
   */
  
  #ifndef LINUX_RIO_DRV_H
  #define LINUX_RIO_DRV_H
  
  #include <linux/types.h>
  #include <linux/ioport.h>
  #include <linux/list.h>
  #include <linux/errno.h>
  #include <linux/string.h>
  #include <linux/rio.h>
  
  extern int __rio_local_read_config_32(struct rio_mport *port, u32 offset,
  				      u32 * data);
  extern int __rio_local_write_config_32(struct rio_mport *port, u32 offset,
  				       u32 data);
  extern int __rio_local_read_config_16(struct rio_mport *port, u32 offset,
  				      u16 * data);
  extern int __rio_local_write_config_16(struct rio_mport *port, u32 offset,
  				       u16 data);
  extern int __rio_local_read_config_8(struct rio_mport *port, u32 offset,
  				     u8 * data);
  extern int __rio_local_write_config_8(struct rio_mport *port, u32 offset,
  				      u8 data);
  
  extern int rio_mport_read_config_32(struct rio_mport *port, u16 destid,
  				    u8 hopcount, u32 offset, u32 * data);
  extern int rio_mport_write_config_32(struct rio_mport *port, u16 destid,
  				     u8 hopcount, u32 offset, u32 data);
  extern int rio_mport_read_config_16(struct rio_mport *port, u16 destid,
  				    u8 hopcount, u32 offset, u16 * data);
  extern int rio_mport_write_config_16(struct rio_mport *port, u16 destid,
  				     u8 hopcount, u32 offset, u16 data);
  extern int rio_mport_read_config_8(struct rio_mport *port, u16 destid,
  				   u8 hopcount, u32 offset, u8 * data);
  extern int rio_mport_write_config_8(struct rio_mport *port, u16 destid,
  				    u8 hopcount, u32 offset, u8 data);
  
  /**
   * rio_local_read_config_32 - Read 32 bits from local configuration space
   * @port: Master port
   * @offset: Offset into local configuration space
   * @data: Pointer to read data into
   *
   * Reads 32 bits of data from the specified offset within the local
   * device's configuration space.
   */
  static inline int rio_local_read_config_32(struct rio_mport *port, u32 offset,
  					   u32 * data)
  {
  	return __rio_local_read_config_32(port, offset, data);
  }
  
  /**
   * rio_local_write_config_32 - Write 32 bits to local configuration space
   * @port: Master port
   * @offset: Offset into local configuration space
   * @data: Data to be written
   *
   * Writes 32 bits of data to the specified offset within the local
   * device's configuration space.
   */
  static inline int rio_local_write_config_32(struct rio_mport *port, u32 offset,
  					    u32 data)
  {
  	return __rio_local_write_config_32(port, offset, data);
  }
  
  /**
   * rio_local_read_config_16 - Read 16 bits from local configuration space
   * @port: Master port
   * @offset: Offset into local configuration space
   * @data: Pointer to read data into
   *
   * Reads 16 bits of data from the specified offset within the local
   * device's configuration space.
   */
  static inline int rio_local_read_config_16(struct rio_mport *port, u32 offset,
  					   u16 * data)
  {
  	return __rio_local_read_config_16(port, offset, data);
  }
  
  /**
   * rio_local_write_config_16 - Write 16 bits to local configuration space
   * @port: Master port
   * @offset: Offset into local configuration space
   * @data: Data to be written
   *
   * Writes 16 bits of data to the specified offset within the local
   * device's configuration space.
   */
  
  static inline int rio_local_write_config_16(struct rio_mport *port, u32 offset,
  					    u16 data)
  {
  	return __rio_local_write_config_16(port, offset, data);
  }
  
  /**
   * rio_local_read_config_8 - Read 8 bits from local configuration space
   * @port: Master port
   * @offset: Offset into local configuration space
   * @data: Pointer to read data into
   *
   * Reads 8 bits of data from the specified offset within the local
   * device's configuration space.
   */
  static inline int rio_local_read_config_8(struct rio_mport *port, u32 offset,
  					  u8 * data)
  {
  	return __rio_local_read_config_8(port, offset, data);
  }
  
  /**
   * rio_local_write_config_8 - Write 8 bits to local configuration space
   * @port: Master port
   * @offset: Offset into local configuration space
   * @data: Data to be written
   *
   * Writes 8 bits of data to the specified offset within the local
   * device's configuration space.
   */
  static inline int rio_local_write_config_8(struct rio_mport *port, u32 offset,
  					   u8 data)
  {
  	return __rio_local_write_config_8(port, offset, data);
  }
  
  /**
   * rio_read_config_32 - Read 32 bits from configuration space
   * @rdev: RIO device
   * @offset: Offset into device configuration space
   * @data: Pointer to read data into
   *
   * Reads 32 bits of data from the specified offset within the
   * RIO device's configuration space.
   */
  static inline int rio_read_config_32(struct rio_dev *rdev, u32 offset,
  				     u32 * data)
  {
  	return rio_mport_read_config_32(rdev->net->hport, rdev->destid,
  					rdev->hopcount, offset, data);
  };
  
  /**
   * rio_write_config_32 - Write 32 bits to configuration space
   * @rdev: RIO device
   * @offset: Offset into device configuration space
   * @data: Data to be written
   *
   * Writes 32 bits of data to the specified offset within the
   * RIO device's configuration space.
   */
  static inline int rio_write_config_32(struct rio_dev *rdev, u32 offset,
  				      u32 data)
  {
  	return rio_mport_write_config_32(rdev->net->hport, rdev->destid,
  					 rdev->hopcount, offset, data);
  };
  
  /**
   * rio_read_config_16 - Read 16 bits from configuration space
   * @rdev: RIO device
   * @offset: Offset into device configuration space
   * @data: Pointer to read data into
   *
   * Reads 16 bits of data from the specified offset within the
   * RIO device's configuration space.
   */
  static inline int rio_read_config_16(struct rio_dev *rdev, u32 offset,
  				     u16 * data)
  {
  	return rio_mport_read_config_16(rdev->net->hport, rdev->destid,
  					rdev->hopcount, offset, data);
  };
  
  /**
   * rio_write_config_16 - Write 16 bits to configuration space
   * @rdev: RIO device
   * @offset: Offset into device configuration space
   * @data: Data to be written
   *
   * Writes 16 bits of data to the specified offset within the
   * RIO device's configuration space.
   */
  static inline int rio_write_config_16(struct rio_dev *rdev, u32 offset,
  				      u16 data)
  {
  	return rio_mport_write_config_16(rdev->net->hport, rdev->destid,
  					 rdev->hopcount, offset, data);
  };
  
  /**
   * rio_read_config_8 - Read 8 bits from configuration space
   * @rdev: RIO device
   * @offset: Offset into device configuration space
   * @data: Pointer to read data into
   *
   * Reads 8 bits of data from the specified offset within the
   * RIO device's configuration space.
   */
  static inline int rio_read_config_8(struct rio_dev *rdev, u32 offset, u8 * data)
  {
  	return rio_mport_read_config_8(rdev->net->hport, rdev->destid,
  				       rdev->hopcount, offset, data);
  };
  
  /**
   * rio_write_config_8 - Write 8 bits to configuration space
   * @rdev: RIO device
   * @offset: Offset into device configuration space
   * @data: Data to be written
   *
   * Writes 8 bits of data to the specified offset within the
   * RIO device's configuration space.
   */
  static inline int rio_write_config_8(struct rio_dev *rdev, u32 offset, u8 data)
  {
  	return rio_mport_write_config_8(rdev->net->hport, rdev->destid,
  					rdev->hopcount, offset, data);
  };
  
  extern int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid,
  				   u16 data);
  
  /**
   * rio_send_doorbell - Send a doorbell message to a device
   * @rdev: RIO device
   * @data: Doorbell message data
   *
   * Send a doorbell message to a RIO device. The doorbell message
   * has a 16-bit info field provided by the @data argument.
   */
  static inline int rio_send_doorbell(struct rio_dev *rdev, u16 data)
  {
  	return rio_mport_send_doorbell(rdev->net->hport, rdev->destid, data);
  };
  
  /**
   * rio_init_mbox_res - Initialize a RIO mailbox resource
   * @res: resource struct
   * @start: start of mailbox range
   * @end: end of mailbox range
   *
   * This function is used to initialize the fields of a resource
   * for use as a mailbox resource.  It initializes a range of
   * mailboxes using the start and end arguments.
   */
  static inline void rio_init_mbox_res(struct resource *res, int start, int end)
  {
  	memset(res, 0, sizeof(struct resource));
  	res->start = start;
  	res->end = end;
  	res->flags = RIO_RESOURCE_MAILBOX;
  }
  
  /**
   * rio_init_dbell_res - Initialize a RIO doorbell resource
   * @res: resource struct
   * @start: start of doorbell range
   * @end: end of doorbell range
   *
   * This function is used to initialize the fields of a resource
   * for use as a doorbell resource.  It initializes a range of
   * doorbell messages using the start and end arguments.
   */
  static inline void rio_init_dbell_res(struct resource *res, u16 start, u16 end)
  {
  	memset(res, 0, sizeof(struct resource));
  	res->start = start;
  	res->end = end;
  	res->flags = RIO_RESOURCE_DOORBELL;
  }
  
  /**
   * RIO_DEVICE - macro used to describe a specific RIO device
   * @dev: the 16 bit RIO device ID
   * @ven: the 16 bit RIO vendor ID
   *
   * This macro is used to create a struct rio_device_id that matches a
   * specific device.  The assembly vendor and assembly device fields
   * will be set to %RIO_ANY_ID.
   */
  #define RIO_DEVICE(dev,ven) \
  	.did = (dev), .vid = (ven), \
  	.asm_did = RIO_ANY_ID, .asm_vid = RIO_ANY_ID
  
  /* Mailbox management */
  extern int rio_request_outb_mbox(struct rio_mport *, void *, int, int,
  				 void (*)(struct rio_mport *, void *,int, int));
  extern int rio_release_outb_mbox(struct rio_mport *, int);
  
  /**
   * rio_add_outb_message - Add RIO message to an outbound mailbox queue
   * @mport: RIO master port containing the outbound queue
   * @rdev: RIO device the message is be sent to
   * @mbox: The outbound mailbox queue
   * @buffer: Pointer to the message buffer
   * @len: Length of the message buffer
   *
   * Adds a RIO message buffer to an outbound mailbox queue for
   * transmission. Returns 0 on success.
   */
  static inline int rio_add_outb_message(struct rio_mport *mport,
  				       struct rio_dev *rdev, int mbox,
  				       void *buffer, size_t len)
  {
  	return mport->ops->add_outb_message(mport, rdev, mbox,
  						   buffer, len);
  }
  
  extern int rio_request_inb_mbox(struct rio_mport *, void *, int, int,
  				void (*)(struct rio_mport *, void *, int, int));
  extern int rio_release_inb_mbox(struct rio_mport *, int);
  
  /**
   * rio_add_inb_buffer - Add buffer to an inbound mailbox queue
   * @mport: Master port containing the inbound mailbox
   * @mbox: The inbound mailbox number
   * @buffer: Pointer to the message buffer
   *
   * Adds a buffer to an inbound mailbox queue for reception. Returns
   * 0 on success.
   */
  static inline int rio_add_inb_buffer(struct rio_mport *mport, int mbox,
  				     void *buffer)
  {
  	return mport->ops->add_inb_buffer(mport, mbox, buffer);
  }
  
  /**
   * rio_get_inb_message - Get A RIO message from an inbound mailbox queue
   * @mport: Master port containing the inbound mailbox
   * @mbox: The inbound mailbox number
   *
   * Get a RIO message from an inbound mailbox queue. Returns 0 on success.
   */
  static inline void *rio_get_inb_message(struct rio_mport *mport, int mbox)
  {
  	return mport->ops->get_inb_message(mport, mbox);
  }
  
  /* Doorbell management */
  extern int rio_request_inb_dbell(struct rio_mport *, void *, u16, u16,
  				 void (*)(struct rio_mport *, void *, u16, u16, u16));
  extern int rio_release_inb_dbell(struct rio_mport *, u16, u16);
  extern struct resource *rio_request_outb_dbell(struct rio_dev *, u16, u16);
  extern int rio_release_outb_dbell(struct rio_dev *, struct resource *);
  
  /* Memory region management */
  int rio_claim_resource(struct rio_dev *, int);
  int rio_request_regions(struct rio_dev *, char *);
  void rio_release_regions(struct rio_dev *);
  int rio_request_region(struct rio_dev *, int, char *);
  void rio_release_region(struct rio_dev *, int);
  
  /* Memory mapping functions */
  extern int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
  			u64 rbase, u32 size, u32 rflags);
  extern void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart);
  
  /* Port-Write management */
  extern int rio_request_inb_pwrite(struct rio_dev *,
  			int (*)(struct rio_dev *, union rio_pw_msg*, int));
  extern int rio_release_inb_pwrite(struct rio_dev *);
  extern int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg);
  
  /* LDM support */
  int rio_register_driver(struct rio_driver *);
  void rio_unregister_driver(struct rio_driver *);
  struct rio_dev *rio_dev_get(struct rio_dev *);
  void rio_dev_put(struct rio_dev *);
  
  #ifdef CONFIG_RAPIDIO_DMA_ENGINE
  extern struct dma_chan *rio_request_dma(struct rio_dev *rdev);
  extern void rio_release_dma(struct dma_chan *dchan);
  extern struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(
  		struct rio_dev *rdev, struct dma_chan *dchan,
  		struct rio_dma_data *data,
  		enum dma_transfer_direction direction, unsigned long flags);
  #endif
  
  /**
   * rio_name - Get the unique RIO device identifier
   * @rdev: RIO device
   *
   * Get the unique RIO device identifier. Returns the device
   * identifier string.
   */
  static inline const char *rio_name(struct rio_dev *rdev)
  {
  	return dev_name(&rdev->dev);
  }
  
  /**
   * rio_get_drvdata - Get RIO driver specific data
   * @rdev: RIO device
   *
   * Get RIO driver specific data. Returns a pointer to the
   * driver specific data.
   */
  static inline void *rio_get_drvdata(struct rio_dev *rdev)
  {
  	return dev_get_drvdata(&rdev->dev);
  }
  
  /**
   * rio_set_drvdata - Set RIO driver specific data
   * @rdev: RIO device
   * @data: Pointer to driver specific data
   *
   * Set RIO driver specific data. device struct driver data pointer
   * is set to the @data argument.
   */
  static inline void rio_set_drvdata(struct rio_dev *rdev, void *data)
  {
  	dev_set_drvdata(&rdev->dev, data);
  }
  
  /* Misc driver helpers */
  extern u16 rio_local_get_device_id(struct rio_mport *port);
  extern struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from);
  extern struct rio_dev *rio_get_asm(u16 vid, u16 did, u16 asm_vid, u16 asm_did,
  				   struct rio_dev *from);
  
  #endif				/* LINUX_RIO_DRV_H */
  