[linux-2.6-block.git] / include / scsi / libsrp.h

#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
Commit	Line	Data
26b14823 FT	1	#ifndef __LIBSRP_H__
	2	#define __LIBSRP_H__
	3
	4	#include <linux/list.h>
	5	#include <scsi/scsi_cmnd.h>
	6	#include <scsi/scsi_host.h>
	7	#include <scsi/srp.h>
	8
	9	enum iue_flags {
	10	V_DIOVER,
	11	V_WRITE,
	12	V_LINKED,
	13	V_FLYING,
	14	};
	15
	16	struct srp_buf {
	17	dma_addr_t dma;
	18	void *buf;
	19	};
	20
	21	struct srp_queue {
	22	void *pool;
	23	void *items;
	24	struct kfifo *queue;
	25	spinlock_t lock;
	26	};
	27
	28	struct srp_target {
	29	struct Scsi_Host *shost;
	30	struct device *dev;
	31
	32	spinlock_t lock;
	33	struct list_head cmd_queue;
	34
	35	size_t srp_iu_size;
	36	struct srp_queue iu_queue;
	37	size_t rx_ring_size;
	38	struct srp_buf **rx_ring;
	39
	40	void *ldata;
	41	};
	42
	43	struct iu_entry {
	44	struct srp_target *target;
	45
	46	struct list_head ilist;
	47	dma_addr_t remote_token;
	48	unsigned long flags;
	49
	50	struct srp_buf *sbuf;
	51	};
	52
	53	typedef int (srp_rdma_t)(struct scsi_cmnd , struct scatterlist , int,
	54	struct srp_direct_buf *, int,
	55	enum dma_data_direction, unsigned int);
	56	extern int srp_target_alloc(struct srp_target , struct device , size_t, size_t);
	57	extern void srp_target_free(struct srp_target *);
	58
	59	extern struct iu_entry srp_iu_get(struct srp_target );
	60	extern void srp_iu_put(struct iu_entry *);
	61
17b0bcfa	62	extern int srp_cmd_queue(struct Scsi_Host , struct srp_cmd , void *, u64, u64);
26b14823 FT	63	extern int srp_transfer_data(struct scsi_cmnd , struct srp_cmd ,
	64	srp_rdma_t, int, int);
	65
	66
	67	static inline struct srp_target host_to_srp_target(struct Scsi_Host host)
	68	{
	69	return (struct srp_target *) host->hostdata;
	70	}
	71
	72	static inline int srp_cmd_direction(struct srp_cmd *cmd)
	73	{
	74	return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
	75	}
	76
	77	#endif