On Tue, Mar 13, 2012 at 2:12 AM, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote: > On Sun, Mar 11, 2012 at 05:43:26PM +0000, Kamil Grzebien wrote: >> I've initialisation problem with my iwl3945 network card in Dell XPS >> M1530 laptop. The issue is known and described in couple of bug >> reports (eg. http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=2143). >> There are workarounds but I'd like to solve the problem permanently. >> Basically when initializing I get: >> >> iwl3945 0000:0b:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ >> iwl3945 0000:0b:00.0: setting latency timer to 64 >> iwl3945 0000:0b:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0xFFFFFFFF >> iwl3945 0000:0b:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0xFFFFFFFF >> .... >> iwl3945 0000:0b:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0xFFFFFFFF >> iwl3945 0000:0b:00.0: bad EEPROM signature,EEPROM_GP=0x00000007 >> iwl3945 0000:0b:00.0: EEPROM not found, EEPROM_GP=0xffffffff > It's worth to mansion that this problem happen after wakeup from suspend > to ram. > >> 1. Driver can't initialize card as all ioread32/iowrite32 seems to not >> do their job. All reads finalize with 0xffffffff. >> >> However I can see that: >> - pci_iomap(pdev, 0, 0) doesn't return error, >> - pci_resource_start(pdev, 0) seems gives correct address (I can >> compare it with the one I can see in /proc/iomem). >> >> If I access the memory directly, not by mapping, I can write and read >> pci memory but driver load fails anyway. I don't understand why can't >> access using mapped memory. > How do you access memory directly ? > >> 2. If I check BASE_ADDRESS with setpci it doesn't give correct values: >> >> # setpci -v -s 0b:00.0 BASE_ADDRESS_0 BASE_ADDRESS_1 >> 0000:0b:00.0 @10 = 00000000 >> 0000:0b:00.0 @14 = 00000000 >> >> Not sure if it's done by driver itself or it should point correct >> values even if the driver wasn't fully loaded. >> >> Have you got any idea of: >> - why IO memory isn't accessible? what could cause that? >> - how APIC could change the load process in this particular case? (if >> I boot with noapic kernel option it usually works fine) > Is this really noapic or maybe noacpi ? ACPI manage PCIe devices. > >> This issue is reproducible in 100% on my system when I turn on the >> machine. It doesn't occur after some work on it. I'd be very happy to >> get rid of the issue. >> >> Could you point some ideas that might be worth checking in driver or >> kernel please? I've tried couple of ideas but none worked for me. > > Would be good to check if pcie bridge is configured correctly after > suspend to ram. But I don't know how to do this, that's why we are > on linux-pci mailing list :-) > > Note we have similar bug report, which was actual regression and > that problem is already fixed by PCI patch: > http://marc.info/?l=linux-kernel&m=132577331232330&w=2 The bug report (http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=2143) has a lot of logs, but they're pretty old and I can't tell how applicable they are to your situation. It would be useful to see a complete dmesg log, /proc/iomem, and "lspci -vv" output from your machine after the problem occurs, and also the same information when it works (when using the noapic flag). Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
