'\" t
.\"     Title: ccw_device_start_timeout_key
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: The ccw bus
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "CCW_DEVICE_START_TIM" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "The ccw bus"
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.SH "NAME"
ccw_device_start_timeout_key \- start a s390 channel program with timeout and key
.SH "SYNOPSIS"
.HP \w'int\ ccw_device_start_timeout_key('u
.BI "int ccw_device_start_timeout_key(struct\ ccw_device\ *\ " "cdev" ", struct\ ccw1\ *\ " "cpa" ", unsigned\ long\ " "intparm" ", __u8\ " "lpm" ", __u8\ " "key" ", unsigned\ long\ " "flags" ", int\ " "expires" ");"
.SH "ARGUMENTS"
.PP
\fIcdev\fR
.RS 4
target ccw device
.RE
.PP
\fIcpa\fR
.RS 4
logical start address of channel program
.RE
.PP
\fIintparm\fR
.RS 4
user specific interruption parameter; will be presented back to
\fIcdev\fR\*(Aqs interrupt handler\&. Allows a device driver to associate the interrupt with a particular I/O request\&.
.RE
.PP
\fIlpm\fR
.RS 4
defines the channel path to be used for a specific I/O request\&. A value of 0 will make cio use the opm\&.
.RE
.PP
\fIkey\fR
.RS 4
storage key to be used for the I/O
.RE
.PP
\fIflags\fR
.RS 4
additional flags; defines the action to be performed for I/O processing\&.
.RE
.PP
\fIexpires\fR
.RS 4
timeout value in jiffies
.RE
.SH "DESCRIPTION"
.PP
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
\fIexpires\fR\&. If a timeout occurs, the channel program is terminated via xsch, hsch or csch, and the device\*(Aqs interrupt handler will be called with an irb containing ERR_PTR(\-\fBETIMEDOUT\fR)\&.
.SH "RETURN"
.PP
\fB0\fR, if the operation was successful; \-\fBEBUSY\fR, if the device is busy, or status pending; \-\fBEACCES\fR, if no path specified in
\fIlpm\fR
is operational; \-\fBENODEV\fR, if the device is not operational\&.
.SH "CONTEXT"
.PP
Interrupts disabled, ccw device lock held
.SH "AUTHOR"
.PP
\fBCornelia Huck\fR <\&cornelia.huck@de.ibm.com\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br