IOP(4)

NAME
iop - I2O RAID controller

SYNOPSIS
iop* at pci?
iopsp* at iop?
ioprbs* at iop?
scsibus* at iopsp?
scsibus* at ioprbs?
option I2OVERBOSE

DESCRIPTION
The iop driver provides support for PCI I/O processors conforming to the I2O specification, revision 1.5 and above.

IOCTL INTERFACE
The following structures and constants are defined in <dev/i2o/iopio.h>. Note that the headers <sys/types.h>, <sys/device.h> and <dev/i2o/i2o.h> are prerequisites and must therefore be included beforehand.

IOPIOCPT (struct ioppt)
    Submit a message to the IOP and return the reply. Note that the return value of this ioctl is not affected by completion status as indicated by the reply.

        struct ioppt {
        	void	*pt_msg;	/* pointer to message buffer */
        	size_t	pt_msglen;	/* message buffer size in bytes */
        	void	*pt_reply;	/* pointer to reply buffer */
        	size_t	pt_replylen;	/* reply buffer size in bytes */
        	int	pt_timo;	/* completion timeout in ms */
        	int	pt_nbufs;	/* number of transfers */
        	struct	ioppt_buf pt_bufs[IOP_MAX_MSG_XFERS]; /* transfers */
        };
        struct ioppt_buf {
        	void	*ptb_data;	/* pointer to buffer */
        	size_t	ptb_datalen;	/* buffer size in bytes */
        	int	ptb_out;	/* non-zero if transfer is to IOP */
        };

    The minimum timeout value that may be specified is 1000ms. All other values must not exceed the iop driver's operational limits.

IOPIOCGSTATUS (struct iovec)
    Request the latest available status record from the IOP. This special-case ioctl is provided as the I2O_EXEC_STATUS_GET message does not post replies, and can therefore not be safely issued using the IOPIOCPT ioctl.

The following ioctls may block while attempting to acquire the iop driver's configuration lock, and may fail if the acquisition times out.

IOPIOCGLCT (struct iovec)
    Retrieve the iop driver's copy of the logical configuration table. This copy of the LCT matches the current device configuration, but is not necessarily the latest available version of the LCT.

IOPIOCRECONFIG
    Request that the iop driver scan all bus ports, retrieve the latest version of the LCT, and attach or detach devices as necessary. Note that higher-level reconfiguration tasks (such as logically re-scanning SCSI buses) will not be performed by this ioctl.

IOPIOCGTIDMAP (struct iovec)
    Retrieve the TID to device map. This map indicates which targets are configured, and what the corresponding device name for each is. Although at any given point it contains the same number of entries as the LCT, the number of entries should be determined using the iov_len field from the returned iovec.

        struct iop_tidmap {
        	u_short	it_tid;
        	u_short	it_flags;
        	char	it_dvname[sizeof(((struct device *)NULL)->dv_xname)];
        };
        #define	IT_CONFIGURED	0x02	/* target configured */

FILES
/dev/iopu
    control device for IOP unit u

SEE ALSO
intro(4), ioprbs(4), iopsp(4), pci(4), scsibus(4), iopctl(8)

HISTORY
The iop driver first appeared in NetBSD 1.6, OpenBSD support was added in OpenBSD 3.0.

AUTHORS
-nosplit The iop driver was written by Andrew Doran <ad@netbsd.org> and ported to OpenBSD 3.0 by Niklas Hallqvist <niklas@openbsd.org> and Michael Shalayeff <mickey@openbsd.org>.