/* Overrides scsi_pointer */
struct uas_cmd_info {
	unsigned int state;
	unsigned int uas_tag;
	struct urb *cmd_urb;
	struct urb *data_in_urb;
	struct urb *data_out_urb;
};

/* 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 */
        struct delayed_work abort_work;
        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;

        unsigned char prot_op;
        unsigned char prot_type;

        unsigned short cmd_len;
        enum dma_data_direction sc_data_direction;

        /* These elements define the operation we are about to perform */
        unsigned char *cmnd;


        /* These elements define the operation we ultimately want to perform */
        struct scsi_data_buffer sdb;
        struct scsi_data_buffer *prot_sdb;

        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 */

        struct request *request;        /* The command we are
                                           working on */

#define SCSI_SENSE_BUFFERSIZE   96
unsigned char *sense_buffer;
                                /* 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 */

        /* FOR RH USE ONLY
         *
         * The following padding has been inserted before ABI freeze to
         * allow extending the structure while preserve ABI.
         */
        RH_KABI_RESERVE_P(1)
        RH_KABI_RESERVE_P(2)
        RH_KABI_RESERVE_P(3)
        RH_KABI_RESERVE_P(4)

};

static struct scsi_host_template uas_host_template = {
        .module = THIS_MODULE,
        .name = "uas",
        .queuecommand = uas_queuecommand,
        .target_alloc = uas_target_alloc,
        .slave_alloc = uas_slave_alloc,
        .slave_configure = uas_slave_configure,
        .eh_abort_handler = uas_eh_abort_handler,
        .eh_bus_reset_handler = uas_eh_bus_reset_handler,
        .can_queue = MAX_CMNDS,
        .this_id = -1,
        .sg_tablesize = SG_NONE,
        .cmd_per_lun = 1,       /* until we override it */
        .skip_settle_delay = 1,
        .ordered_tag = 1,
};