SYNOPSIS
- int ccw_device_start_timeout(struct ccw_device * cdev, struct ccw1 * cpa, unsigned long intparm, __u8 lpm, unsigned long flags, int expires);
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.
flags
- additional flags; defines the action to be performed for I/O processing.
expires
- timeout value in jiffies
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). This function notifies the device driver if the channel program has not completed during the time specified by expires. If a timeout occurs, the channel program is terminated via xsch, hsch or csch, and the device's interrupt handler will be called with an irb containing ERR_PTR(-ETIMEDOUT).
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
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