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.TH "PCI_CFG_SPACE_SIZE" "9" "09 October 2005" "" ""

.SH NAME
pci_cfg_space_size \- get the configuration space size of the PCI device.
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
int pci_cfg_space_size  (struct pci_dev * \fIdev\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIdev\fB\fR
-- undescribed --
.SH "DESCRIPTION"
.PP
.PP
Regular PCI devices have 256 bytes, but PCI-X 2 and PCI Express devices
have 4096 bytes.  Even if the device is capable, that doesn't mean we can
access it.  Maybe we don't have a way to generate extended config space
accesses, or the device is behind a reverse Express bridge.  So we try
reading the dword at 0x100 which must either be 0 or a valid extended
capability header.