Date: Fri, 22 Aug 2008 20:05:11 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: rpaulo@FreeBSD.org Cc: brooks@FreeBSD.org, ivoras@FreeBSD.org, brueffer@FreeBSD.org, freebsd-arch@FreeBSD.org Subject: Re: Magic symlinks redux Message-ID: <20080822.200511.1137957320.imp@bsdimp.com> In-Reply-To: <20080823013912.GA19588@epsilon.local> References: <20080822.160107.511563083.imp@bsdimp.com> <20080822225119.GA65119@onelab2.iet.unipi.it> <20080823013912.GA19588@epsilon.local>
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In message: <20080823013912.GA19588@epsilon.local>
: I hope this is what Warner was trying to say.
More or less the following, with a less lame way of getting the table
into the kernel, and maybe more fields than vendor/device....
The reason this works is that the pci_get_vendor and pci_get_device
read out of the area pointed to by cfg.
Warner
Index: pci.c
===================================================================
--- pci.c (revision 182024)
+++ pci.c (working copy)
@@ -419,6 +419,33 @@
#undef REG
}
+static struct pci_remap_entry
+{
+ uint16_t vendor;
+ uint16_t device;
+ uint16_t mapped_vendor;
+ uint16_t mapped_device;
+} pci_remap[] =
+{
+ { 0x1039, 0x0901, 0x1039, 0x0900 } /* Map sis 901 to sis 900 */
+};
+static int pci_remap_entries = 1;
+
+static void
+pci_apply_remap_table(pcicfgregs *cfg)
+{
+ int i;
+
+ for (i = 0; i < pci_remap_entries; i++) {
+ if (cfg->vendor == pci_remap[i].vendor &&
+ cfg->device == pci_remap[i].device) {
+ cfg->vendor = pci_remap[i].mapped_vendor;
+ cfg->device = pci_remap[i].mapped_device;
+ return;
+ }
+ }
+}
+
/* read configuration header into pcicfgregs structure */
struct pci_devinfo *
pci_read_device(device_t pcib, int d, int b, int s, int f, size_t size)
@@ -465,6 +492,7 @@
pci_fixancient(cfg);
pci_hdrtypedata(pcib, b, s, f, cfg);
+ pci_apply_remap_table(cfg);
if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT)
pci_read_extcap(pcib, cfg);
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