On 14:51 Fri 20 Feb , Ralf Baechle wrote: > On Fri, Feb 20, 2009 at 09:01:57PM +0800, Zhang Le wrote: > > > Currently, xorg-server on loongson need a patch: > > http://www.gentoo-cn.org/gitweb/?p=loongson;a=blob;f=x11-base/xorg-server/files/xorg-server-1.5.3-loongson.patch;h=9c48b3752b7f14b6603524f46ae832f312e7c6fe;hb=HEAD#l37 > > Please note that line 37, the last parameter to mmap, which is the ioBase_phys, > > is hardcoded. > > > > This patch no long applies to xorg-server git master. > > It should have been rejected by the maintainer before. This was obviously > fragile and had no fighting chance to ever work on anything but a Fulong. Exactly. [snip] > # lspci -vvv -s 1d.1 > 00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI]) > Subsystem: Dell Device 01fe > Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- > Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- > Latency: 0 > Interrupt: pin B routed to IRQ 21 > Region 4: I/O ports at 6f60 [size=32] > Kernel driver in use: uhci_hcd > > Now let's see how to find this in sysfs: > > # ls -l /sys/bus/pci/devices/0000:00:1d.1/resource* > -r--r--r-- 1 root root 4096 2009-02-20 14:13 /sys/bus/pci/devices/0000:00:1d.1/resource > -rw------- 1 root root 32 2009-02-20 14:20 /sys/bus/pci/devices/0000:00:1d.1/resource4 > # cat /sys/bus/pci/devices/0000:00:1d.1/resource > 0x0000000000000000 0x0000000000000000 0x0000000000000000 > 0x0000000000000000 0x0000000000000000 0x0000000000000000 > 0x0000000000000000 0x0000000000000000 0x0000000000000000 > 0x0000000000000000 0x0000000000000000 0x0000000000000000 > 0x0000000000006f60 0x0000000000006f7f 0x0000000000020101 > 0x0000000000000000 0x0000000000000000 0x0000000000000000 > 0x0000000000000000 0x0000000000000000 0x0000000000000000 > > So if you want to mmap the 4th resource, just mmap the file > /sys/bus/pci/devices/0000:00:1d.1/resource4. This leaves how to obtain > the "0000:00:1d.1" - you have to find it by looking at the vendor and device > files in every file in /proc/bus/pci/devices/ which contain the PCI vendor > and device ID as hex numbers. For my example device here: > > [root@h5 0000:09:00.0]# cat device > 0x1673 > [root@h5 0000:09:00.0]# cat vendor > 0x14e4 > [root@h5 0000:09:00.0]# > > Hopefully X finally has some nice infrastructure for this sort of stuff. > > And for completeness sake, directly looking at the BARs in the PCI config > space is another method but this one is deprecated these days as it may > not work on some complex systems. > > # od -A x -t x4 -j 0x10 -N 0x20 /proc/bus/pci/00/1d.1 > 000010 00000000 00000000 00000000 00000000 > 000020 00006f61 00000000 00000000 01fe1028 > 000030 > # Thank you for the above comment! It is very informative! I will try to make a new patch. Zhang, Le
