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

6       ccw_device_start - start a s390 channel program
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SYNOPSIS

9       int ccw_device_start(struct ccw_device * cdev, struct ccw1 * cpa,
10                            unsigned long intparm, __u8 lpm,
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       flags
30           additional flags; defines the action to be performed for I/O
31           processing.
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DESCRIPTION

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

39       0, if the operation was successful; -EBUSY, if the device is busy, or
40       status pending; -EACCES, if no path specified in lpm is operational;
41       -ENODEV, if the device is not operational.
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CONTEXT

44       Interrupts disabled, ccw device lock held
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AUTHOR

47       Cornelia Huck <cornelia.huck@de.ibm.com>
48           Author.
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51Kernel Hackers Manual 2.6.         June 2019               CCW_DEVICE_START(9)
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