On Tue, Mar 22, 2005 at 11:38:36AM -0600, Brian King was heard to remark: > Linas Vepstas wrote: > > > > My current hardware will halt all i/o to/from the symbios controller > > upon detection of a PCI error. The recovery proceedure that I am > > currently using is to call system firmware (aka 'bios') to raise > > and then lower the #RST pci signal line for 1/4 second, then wait 2 > > seconds for the PCI bus to settle, then restore the PCI config space > > registers (BARs, interrupt line, etc) to what they used to be. Then, > > I call sym_start_up() in an attempt to get the symbios card working > > again. And that's where I get stuck ... > > > > My assumption is that after the #RST, that the symbios card will sit > > there, dumb and stupid, with no scripts running. But sometimes I find > > that the card has done something to make the PCI error hardware trip > > again. Typically, this means that the card attempted to DMA to some > > address that its not allowed to touch, or raised #SERR or possibly > > #PERR (I can't tell which). > > What config registers are you restoring?
BAR's, grant, latency, interrupt, cacheline size. > Is it possible symbios does not > like something in your config restore? possibly... > Another possiblity is that asserting PCI reset is not cleanly resetting > the card. Does PCI reset force BIST to be run on these cards? You could > try to manually run BIST on the card after the PCI reset to see if that I didn't see bist in the code, but I wasn't looking for it either. I could try that. > helps, or you could try power cycling the slot instead of using PCI reset. yes I could :( I'll try that next. Problem is, not all slots are power-cyclable, only the hotplug slots are. I've discoverd that for example, the ethernet chips are soldered to the motherboard, and can't be power-cycled (but fortunately, those don't give me trouble). --linas - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
