1CCW_DEVICE_START_KEY(9)           The ccw bus          CCW_DEVICE_START_KEY(9)
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NAME

6       ccw_device_start_key - start a s390 channel program with key
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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);
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ARGUMENTS

14       cdev
15           target ccw device
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17       cpa
18           logical start address of channel program
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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.
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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.
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29       key
30           storage key to be used for the I/O
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32       flags
33           additional flags; defines the action to be performed for I/O
34           processing.
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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).
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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.
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CONTEXT

47       Interrupts disabled, ccw device lock held
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AUTHOR

50       Cornelia Huck <cornelia.huck@de.ibm.com>
51           Author.
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54Kernel Hackers Manual 2.6.       November 2011         CCW_DEVICE_START_KEY(9)
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