struct_ccw_device(9) [centos man page]

STRUCT 
CCW_DEVICE(9)						    The ccw bus 					      STRUCT CCW_DEVICE(9)

NAME

       struct_ccw_device - channel attached device

SYNOPSIS

       struct ccw_device {
	 spinlock_t * ccwlock;
	 struct ccw_device_id id;
	 struct ccw_driver * drv;
	 struct device dev;
	 int online;
	 void (* handler) (struct ccw_device *, unsigned long, struct irb *);
       };

MEMBERS

       ccwlock
	   pointer to device lock

       id
	   id of this device

       drv
	   ccw driver for this device

       dev
	   embedded device structure

       online
	   online status of device

       handler
	   interrupt handler

DESCRIPTION

       handler is a member of the device rather than the driver since a driver can have different interrupt handlers for different ccw devices
       (multi-subchannel drivers).

AUTHOR

       Cornelia Huck <cornelia.huck@de.ibm.com>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						      STRUCT CCW_DEVICE(9)

CCW_DEVICE_START_KEY(9) 					    The ccw bus 					   CCW_DEVICE_START_KEY(9)

NAME

       ccw_device_start_key - start a s390 channel program with key

SYNOPSIS

       int ccw_device_start_key(struct ccw_device * cdev, struct ccw1 * cpa, unsigned long intparm, __u8 lpm, __u8 key, unsigned long flags);

ARGUMENTS

       cdev
	   target ccw device

       cpa
	   logical start address of channel program

       intparm
	   user specific interruption parameter; will be presented back to cdev's interrupt handler. Allows a device driver to associate the
	   interrupt with a particular I/O request.

       lpm
	   defines the channel path to be used for a specific I/O request. A value of 0 will make cio use the opm.

       key
	   storage key to be used for the I/O

       flags
	   additional flags; defines the action to be performed for I/O processing.

DESCRIPTION

       Start a S/390 channel program. When the interrupt arrives, the IRQ handler is called, either immediately, delayed (dev-end missing, or
       sense required) or never (no IRQ handler registered).

RETURNS

       0, if the operation was successful; -EBUSY, if the device is busy, or status pending; -EACCES, if no path specified in lpm is operational;
       -ENODEV, if the device is not operational.

CONTEXT

       Interrupts disabled, ccw device lock held

AUTHOR

       Cornelia Huck <cornelia.huck@de.ibm.com>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   CCW_DEVICE_START_KEY(9)