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#ifndef _SCSI_SCSI_CMND_H

#define _SCSI_SCSI_CMND_H

#include <linux/dma-mapping.h>

#include <linux/list.h>

#include <linux/types.h>

#include <linux/timer.h>

#include <linux/scatterlist.h>

struct request;

struct scatterlist;

struct Scsi_Host;

struct scsi_device;

/* embedded in scsi_cmnd */

struct scsi_pointer {

        char *ptr;              /* data pointer */

        int this_residual;      /* left in this buffer */

        struct scatterlist *buffer;     /* which buffer */

        int buffers_residual;   /* how many buffers left */

        dma_addr_t dma_handle;

        volatile int Status;

        volatile int Message;

        volatile int have_data_in;

        volatile int sent_command;

        volatile int phase;

};

struct scsi_cmnd {

        struct scsi_device *device;

        struct list_head list;  /* scsi_cmnd participates in queue lists */

        struct list_head eh_entry; /* entry for the host eh_cmd_q */

        int eh_eflags;          /* Used by error handlr */

        /*

         * A SCSI Command is assigned a nonzero serial_number before passed

         * to the driver's queue command function.  The serial_number is

         * cleared when scsi_done is entered indicating that the command

         * has been completed.  It is a bug for LLDDs to use this number

         * for purposes other than printk (and even that is only useful

         * for debugging).

         */

        unsigned long serial_number;

        /*

         * This is set to jiffies as it was when the command was first

         * allocated.  It is used to time how long the command has

         * been outstanding

         */

        unsigned long jiffies_at_alloc;

        int retries;

        int allowed;

        int timeout_per_command;

        unsigned char cmd_len;

        enum dma_data_direction sc_data_direction;

        /* These elements define the operation we are about to perform */

#define MAX_COMMAND_SIZE        16

        unsigned char cmnd[MAX_COMMAND_SIZE];

        unsigned request_bufflen;       /* Actual request size */

        struct timer_list eh_timeout;   /* Used to time out the command. */

        void *request_buffer;           /* Actual requested buffer */

        /* These elements define the operation we ultimately want to perform */

        unsigned short use_sg;  /* Number of pieces of scatter-gather */

        unsigned short __use_sg;

        unsigned underflow;     /* Return error if less than

                                   this amount is transferred */

        unsigned transfersize;  /* How much we are guaranteed to

                                   transfer with each SCSI transfer

                                   (ie, between disconnect /

                                   reconnects.   Probably == sector

                                   size */

        int resid;              /* Number of bytes requested to be

                                   transferred less actual number

                                   transferred (0 if not supported) */

        struct request *request;        /* The command we are

                                           working on */

#define SCSI_SENSE_BUFFERSIZE   96

        unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE];

                                /* obtained by REQUEST SENSE when

                                 * CHECK CONDITION is received on original

                                 * command (auto-sense) */

        /* Low-level done function - can be used by low-level driver to point

         *        to completion function.  Not used by mid/upper level code. */

        void (*scsi_done) (struct scsi_cmnd *);

        /*

         * The following fields can be written to by the host specific code.

         * Everything else should be left alone.

         */

        struct scsi_pointer SCp;        /* Scratchpad used by some host adapters */

        unsigned char *host_scribble;   /* The host adapter is allowed to

                                         * call scsi_malloc and get some memory

                                         * and hang it here.  The host adapter

                                         * is also expected to call scsi_free

                                         * to release this memory.  (The memory

                                         * obtained by scsi_malloc is guaranteed

                                         * to be at an address < 16Mb). */

        int result;             /* Status code from lower level driver */

        unsigned char tag;      /* SCSI-II queued command tag */

};

extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t);

extern struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *, gfp_t);

extern void scsi_put_command(struct scsi_cmnd *);

extern void __scsi_put_command(struct Scsi_Host *, struct scsi_cmnd *,

                               struct device *);

extern void scsi_finish_command(struct scsi_cmnd *cmd);

extern void scsi_req_abort_cmd(struct scsi_cmnd *cmd);

extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,

                                 size_t *offset, size_t *len);

extern void scsi_kunmap_atomic_sg(void *virt);

extern struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t);

extern void scsi_free_sgtable(struct scsi_cmnd *);

extern int scsi_dma_map(struct scsi_cmnd *cmd);

extern void scsi_dma_unmap(struct scsi_cmnd *cmd);

#define scsi_sg_count(cmd) ((cmd)->use_sg)

#define scsi_sglist(cmd) ((struct scatterlist *)(cmd)->request_buffer)

#define scsi_bufflen(cmd) ((cmd)->request_bufflen)

static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid)

{

        cmd->resid = resid;

}

static inline int scsi_get_resid(struct scsi_cmnd *cmd)

{

        return cmd->resid;

}

#define scsi_for_each_sg(cmd, sg, nseg, __i)                    \

        for_each_sg(scsi_sglist(cmd), sg, nseg, __i)

#endif /* _SCSI_SCSI_CMND_H */