1CCW_DEVICE_START_KEY(9)           The ccw bus          CCW_DEVICE_START_KEY(9)
2
3
4

NAME

6       ccw_device_start_key - start a s390 channel program with key
7

SYNOPSIS

9       int ccw_device_start_key(struct ccw_device * cdev, struct ccw1 * cpa,
10                                unsigned long intparm, __u8 lpm, __u8 key,
11                                unsigned long flags);
12

ARGUMENTS

14       cdev
15           target ccw device
16
17       cpa
18           logical start address of channel program
19
20       intparm
21           user specific interruption parameter; will be presented back to
22           cdev´s interrupt handler. Allows a device driver to associate the
23           interrupt with a particular I/O request.
24
25       lpm
26           defines the channel path to be used for a specific I/O request. A
27           value of 0 will make cio use the opm.
28
29       key
30           storage key to be used for the I/O
31
32       flags
33           additional flags; defines the action to be performed for I/O
34           processing.
35

DESCRIPTION

37       Start a S/390 channel program. When the interrupt arrives, the IRQ
38       handler is called, either immediately, delayed (dev-end missing, or
39       sense required) or never (no IRQ handler registered).
40

RETURNS

42       0, if the operation was successful; -EBUSY, if the device is busy, or
43       status pending; -EACCES, if no path specified in lpm is operational;
44       -ENODEV, if the device is not operational.
45

CONTEXT

47       Interrupts disabled, ccw device lock held
48

AUTHOR

50       Cornelia Huck <cornelia.huck@de.ibm.com>
51           Author.
52

54Kernel Hackers Manual 2.6.         June 2019           CCW_DEVICE_START_KEY(9)
Impressum