<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <HTML ><HEAD ><TITLE >pci_find_capability</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="The Linux Kernel API" HREF="book1.html"><LINK REL="UP" TITLE="PCI Support Library" HREF="x8182.html"><LINK REL="PREVIOUS" TITLE="pci_find_class" HREF="r8336.html"><LINK REL="NEXT" TITLE="pci_find_parent_resource" HREF="r8422.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >The Linux Kernel API</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="r8336.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="r8422.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="AEN8376" ></A ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >pci_find_capability</SPAN ></SPAN ></H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN8380" ></A ><H2 >Name</H2 >pci_find_capability -- query for devices' capabilities </DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN8383" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN8385" ></A ><P ></P ><P ><CODE ><CODE CLASS="FUNCDEF" >int <TT CLASS="FUNCTION" >pci_find_capability </TT ></CODE >(struct pci_dev * <TT CLASS="PARAMETER" ><I >dev</I ></TT >, int <TT CLASS="PARAMETER" ><I >cap</I ></TT >);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN8393" ></A ><H2 >Arguments</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="PARAMETER" ><I >dev</I ></TT ></DT ><DD ><P > PCI device to query </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >cap</I ></TT ></DT ><DD ><P > capability code </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN8406" ></A ><H2 >Description</H2 ><P > Tell if a device supports a given PCI capability. Returns the address of the requested capability structure within the device's PCI configuration space or 0 in case the device does not support it. Possible values for <TT CLASS="PARAMETER" ><I >cap</I ></TT >: </P ><P > <TT CLASS="CONSTANT" >PCI_CAP_ID_PM</TT > Power Management </P ><P > <TT CLASS="CONSTANT" >PCI_CAP_ID_AGP</TT > Accelerated Graphics Port </P ><P > <TT CLASS="CONSTANT" >PCI_CAP_ID_VPD</TT > Vital Product Data </P ><P > <TT CLASS="CONSTANT" >PCI_CAP_ID_SLOTID</TT > Slot Identification </P ><P > <TT CLASS="CONSTANT" >PCI_CAP_ID_MSI</TT > Message Signalled Interrupts </P ><P > <TT CLASS="CONSTANT" >PCI_CAP_ID_CHSWP</TT > CompactPCI HotSwap </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="r8336.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="book1.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="r8422.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >pci_find_class</SPAN ></SPAN ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="x8182.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >pci_find_parent_resource</SPAN ></SPAN ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >