ccw_device_start_timeout - start a s390 channel program with timeout
2. SYNOPSIS ▲
int ccw_device_start_timeout(struct ccw_device * cdev , struct ccw1 * cpa , unsigned long intparm , __u8 lpm , unsigned long flags , int expires );
3. ARGUMENTS ▲
target ccw device
logical start address of channel program
user specific interruption parameter; will be presented back to cdevAqs interrupt handler. Allows a device driver to associate the interrupt with a particular I/O request.
defines the channel path to be used for a specific I/O request. A value of 0 will make cio use the opm.
additional flags; defines the action to be performed for I/O processing.
timeout value in jiffies
4. 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 deviceAqs interrupt handler will be called with an irb containing ERR_PTR(-ETIMEDOUT).
5. 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.
6. CONTEXT ▲
Interrupts disabled, ccw device lock held
7. AUTHOR ▲
Cornelia Huck <
8. COPYRIGHT ▲