From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from kunk.qbjnet.com (ddsl1-28.ddsl.mr.net [137.192.135.28]) by ozlabs.org (Postfix) with SMTP id 83C0567A67 for ; Tue, 15 Mar 2005 04:52:59 +1100 (EST) Date: 14 Mar 2005 17:52:57 -0000 Message-ID: <20050314175257.13153.qmail@kunk.qbjnet.com> From: linuxppcdev@qbjnet.com To: linuxppc-dev@ozlabs.org Subject: Re: DMA appears broken in 2.6.11 for Mac 7200 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Ben Said: > On Mon, 2005-03-14 at 03:51 +0000, linuxppcdev@qbjnet.com wrote: > > Just updated a couple of old Mac 7200 (601) boxen and ran into trouble with > > the ide driver and a promise PDC20267 card. > > > > The very same drives and card work fine on a 9500 but hang on a 7200. If > > I set the kernel arg ide=nodma I get in the dmesg: > > ide_setup: ide=nodma : Prevented DMA > > and the 7200 boots and runs fine. > > > > Another suspect, the mace ethernet driver (which also appears to use DMA) > > doesn't work on the 7200 with 2.6.11 but does with 2.4.28 and it works > > with 2.6.11 on the 9500. > > Interesting. Not sure what's up, though. Those old machines were known > to have bugs relative to cache coherency... also check wetehr we are > setting the cache line size properly in PCI devices. You can also try to > disable use of PCI memory write & invalidate command in all devices. Here is some info from a 7200 booted off of 2.6.11: dmesg Total memory = 112MB; using 256kB for hash table (at c04c0000) Linux version 2.6.11.2 (root@dev) (gcc version 3.3.4 (Debian 1:3.3.4-9ubuntu5)) #8 Sun Mar 13 12:50:26 CST 2005 Found a Grand Central mac-io controller, rev: 2, mapped at 0xfdf00000 PowerMac motherboard: PowerMac 7200/7300 Cache coherency enabled for bandit/PSX Found Bandit PCI host bridge at 0xf2000000. Firmware bus number: 0->0 nvram: OF partition at 0x1800 nvram: XP partition at 0x1300 nvram: NR partition at 0x1400 On node 0 totalpages: 28672 DMA zone: 28672 pages, LIFO batch:7 Normal zone: 0 pages, LIFO batch:1 HighMem zone: 0 pages, LIFO batch:1 Built 1 zonelists Kernel command line: root=/dev/hda2 video=platinumfb ide=nodma ide_setup: ide=nodma : Prevented DMA System has 32 possible interrupts PID hash table entries: 512 (order: 9, 8192 bytes) . . . Forcing PCI IDE into native mode: 0000:00:0d.0 Rewrite of PROGIF failed ! . . PDC20267: IDE controller at PCI slot 0000:00:0d.0 PDC20267: chipset revision 2 PDC20267: ROM enabled at 0x80860000 PDC20267: 100% native mode on irq 23 PDC20267: (U)DMA Burst Bit DISABLED Primary PCI Mode Secondary PCI Mode. ide0: BM-DMA at 0x0480-0x0487, BIOS settings: hda:pio, hdb:pio ide1: BM-DMA at 0x0488-0x048f, BIOS settings: hdc:pio, hdd:pio Probing IDE interface ide0... . . eth0: Digital DS21143 Tulip rev 33 at c805a000, 00:40:F6:84:F8:C0, IRQ 25. pmac: can't request resource 0! lspci -vv 0000:00:0b.0 Host bridge: Apple Computer Inc. Bandit PowerPC host bridge (rev 03) Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR-