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
cdevīs 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.