Eric Lee / smarc-fsl-linux-kernel

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include/scsi/libsrp.h 1.54 KB
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26b148234   FUJITA Tomonori   [SCSI] scsi tgt: ... 
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  #ifndef __LIBSRP_H__
  #define __LIBSRP_H__
  
  #include <linux/list.h>
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  #include <linux/kfifo.h>
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  #include <scsi/scsi_cmnd.h>
  #include <scsi/scsi_host.h>
  #include <scsi/srp.h>
  
  enum iue_flags {
  	V_DIOVER,
  	V_WRITE,
  	V_LINKED,
  	V_FLYING,
  };
  
  struct srp_buf {
  	dma_addr_t dma;
  	void *buf;
  };
  
  struct srp_queue {
  	void *pool;
  	void *items;
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  	struct kfifo queue;
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  	spinlock_t lock;
  };
  
  struct srp_target {
  	struct Scsi_Host *shost;
  	struct device *dev;
  
  	spinlock_t lock;
  	struct list_head cmd_queue;
  
  	size_t srp_iu_size;
  	struct srp_queue iu_queue;
  	size_t rx_ring_size;
  	struct srp_buf **rx_ring;
  
  	void *ldata;
  };
  
  struct iu_entry {
  	struct srp_target *target;
  
  	struct list_head ilist;
  	dma_addr_t remote_token;
  	unsigned long flags;
  
  	struct srp_buf *sbuf;
  };
  
  typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int,
  			 struct srp_direct_buf *, int,
  			 enum dma_data_direction, unsigned int);
  extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
  extern void srp_target_free(struct srp_target *);
  
  extern struct iu_entry *srp_iu_get(struct srp_target *);
  extern void srp_iu_put(struct iu_entry *);
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  extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64, u64);
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  extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *,
  			     srp_rdma_t, int, int);
  
  
  static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host)
  {
  	return (struct srp_target *) host->hostdata;
  }
  
  static inline int srp_cmd_direction(struct srp_cmd *cmd)
  {
  	return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
  }
  
  #endif