ccw_device_start_key (9) Linux Manual Page
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).
Return
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 [at] de.ibm.com>
- Author.