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drivers/dma/coh901318_lli.h 3.41 KB
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61f135b92   Linus Walleij   Add COH 901 318 D... 
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  /*
   * driver/dma/coh901318_lli.h
   *
   * Copyright (C) 2007-2009 ST-Ericsson
   * License terms: GNU General Public License (GPL) version 2
   * Support functions for handling lli for coh901318
   * Author: Per Friden <per.friden@stericsson.com>
   */
  
  #ifndef COH901318_LLI_H
  #define COH901318_LLI_H
  
  #include <mach/coh901318.h>
  
  struct device;
  
  struct coh901318_pool {
  	spinlock_t lock;
  	struct dma_pool *dmapool;
  	struct device *dev;
  
  #ifdef CONFIG_DEBUG_FS
  	int debugfs_pool_counter;
  #endif
  };
  
  struct device;
  /**
   * coh901318_pool_create() - Creates an dma pool for lli:s
   * @pool: pool handle
   * @dev: dma device
   * @lli_nbr: number of lli:s in the pool
3ad2f3fbb   Daniel Mack   tree-wide: Assort... 
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   * @algin: address alignemtn of lli:s
61f135b92   Linus Walleij   Add COH 901 318 D... 
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   * returns 0 on success otherwise none zero
   */
  int coh901318_pool_create(struct coh901318_pool *pool,
  			  struct device *dev,
  			  size_t lli_nbr, size_t align);
  
  /**
   * coh901318_pool_destroy() - Destroys the dma pool
   * @pool: pool handle
   * returns 0 on success otherwise none zero
   */
  int coh901318_pool_destroy(struct coh901318_pool *pool);
  
  /**
   * coh901318_lli_alloc() - Allocates a linked list
   *
   * @pool: pool handle
   * @len: length to list
   * return: none NULL if success otherwise NULL
   */
  struct coh901318_lli *
  coh901318_lli_alloc(struct coh901318_pool *pool,
  		    unsigned int len);
  
  /**
   * coh901318_lli_free() - Returns the linked list items to the pool
   * @pool: pool handle
   * @lli: reference to lli pointer to be freed
   */
  void coh901318_lli_free(struct coh901318_pool *pool,
  			struct coh901318_lli **lli);
  
  /**
   * coh901318_lli_fill_memcpy() - Prepares the lli:s for dma memcpy
   * @pool: pool handle
   * @lli: allocated lli
   * @src: src address
   * @size: transfer size
   * @dst: destination address
   * @ctrl_chained: ctrl for chained lli
   * @ctrl_last: ctrl for the last lli
   * returns number of CPU interrupts for the lli, negative on error.
   */
  int
  coh901318_lli_fill_memcpy(struct coh901318_pool *pool,
  			  struct coh901318_lli *lli,
  			  dma_addr_t src, unsigned int size,
  			  dma_addr_t dst, u32 ctrl_chained, u32 ctrl_last);
  
  /**
   * coh901318_lli_fill_single() - Prepares the lli:s for dma single transfer
   * @pool: pool handle
   * @lli: allocated lli
   * @buf: transfer buffer
   * @size: transfer size
   * @dev_addr: address of periphal
   * @ctrl_chained: ctrl for chained lli
   * @ctrl_last: ctrl for the last lli
   * @dir: direction of transfer (to or from device)
   * returns number of CPU interrupts for the lli, negative on error.
   */
  int
  coh901318_lli_fill_single(struct coh901318_pool *pool,
  			  struct coh901318_lli *lli,
  			  dma_addr_t buf, unsigned int size,
  			  dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl_last,
  			  enum dma_data_direction dir);
  
  /**
   * coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer
   * @pool: pool handle
   * @lli: allocated lli
   * @sg: scatter gather list
   * @nents: number of entries in sg
   * @dev_addr: address of periphal
   * @ctrl_chained: ctrl for chained lli
   * @ctrl: ctrl of middle lli
   * @ctrl_last: ctrl for the last lli
   * @dir: direction of transfer (to or from device)
   * @ctrl_irq_mask: ctrl mask for CPU interrupt
   * returns number of CPU interrupts for the lli, negative on error.
   */
  int
  coh901318_lli_fill_sg(struct coh901318_pool *pool,
  		      struct coh901318_lli *lli,
  		      struct scatterlist *sg, unsigned int nents,
  		      dma_addr_t dev_addr, u32 ctrl_chained,
  		      u32 ctrl, u32 ctrl_last,
  		      enum dma_data_direction dir, u32 ctrl_irq_mask);
  
  #endif /* COH901318_LLI_H */