Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#ifndef __LIBSRP_H__

#define __LIBSRP_H__

#include <linux/list.h>

#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;

        struct kfifo *queue;

        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 *);

extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64, u64);

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