[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / scsi / libsrp.h

#ifndef __LIBSRP_H__
#define __LIBSRP_H__

#include <linux/list.h>
#include <linux/kfifo.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>
75c85a0b	5	#include <linux/kfifo.h>
26b14823 FT	6	#include <scsi/scsi_cmnd.h>
	7	#include <scsi/scsi_host.h>
	8	#include <scsi/srp.h>
	9
	10	enum iue_flags {
	11	V_DIOVER,
	12	V_WRITE,
	13	V_LINKED,
	14	V_FLYING,
	15	};
	16
	17	struct srp_buf {
	18	dma_addr_t dma;
	19	void *buf;
	20	};
	21
	22	struct srp_queue {
	23	void *pool;
	24	void *items;
45465487	25	struct kfifo queue;
26b14823 FT	26	spinlock_t lock;
	27	};
	28
	29	struct srp_target {
	30	struct Scsi_Host *shost;
	31	struct device *dev;
	32
	33	spinlock_t lock;
	34	struct list_head cmd_queue;
	35
	36	size_t srp_iu_size;
	37	struct srp_queue iu_queue;
	38	size_t rx_ring_size;
	39	struct srp_buf **rx_ring;
	40
	41	void *ldata;
	42	};
	43
	44	struct iu_entry {
	45	struct srp_target *target;
	46
	47	struct list_head ilist;
	48	dma_addr_t remote_token;
	49	unsigned long flags;
	50
	51	struct srp_buf *sbuf;
	52	};
	53
	54	typedef int (srp_rdma_t)(struct scsi_cmnd , struct scatterlist , int,
	55	struct srp_direct_buf *, int,
	56	enum dma_data_direction, unsigned int);
	57	extern int srp_target_alloc(struct srp_target , struct device , size_t, size_t);
	58	extern void srp_target_free(struct srp_target *);
	59
	60	extern struct iu_entry srp_iu_get(struct srp_target );
	61	extern void srp_iu_put(struct iu_entry *);
	62
17b0bcfa	63	extern int srp_cmd_queue(struct Scsi_Host , struct srp_cmd , void *, u64, u64);
26b14823 FT	64	extern int srp_transfer_data(struct scsi_cmnd , struct srp_cmd ,
	65	srp_rdma_t, int, int);
	66
	67
	68	static inline struct srp_target host_to_srp_target(struct Scsi_Host host)
	69	{
	70	return (struct srp_target *) host->hostdata;
	71	}
	72
	73	static inline int srp_cmd_direction(struct srp_cmd *cmd)
	74	{
	75	return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
	76	}
	77
	78	#endif