On 11/24/2009 03:20 PM, Michael Buesch wrote: > On Tuesday 24 November 2009 22:15:52 Chris Vine wrote: >> On Tue, 24 Nov 2009 13:06:43 -0600 >> Larry Finger <Larry.Finger@xxxxxxxxxxxx> wrote: >>> This E-mail is to summarize what I have learned to date. >>> >>> The pm_qos change does nothing useful. It may have helped a little, >>> but the side effects are far worse than the benefits. >>> >>> Most systems work better with b43 when warm booted after Broadcom's >>> wl driver was loaded. The conclusion is that wl is making some change >>> in the setup that b43 is not. >>> >>> (3) Based on the above, I have done MMIO and PCI-E configuration >>> tracing for the two drivers and found some real differences. After >>> seeing these, I did more RE work, and found some setup for the PCI-E >>> core that was missed earlier. I am still working on the changes. What >>> I have completed is found at >>> >>> http://bcm-v4.sipsolutions.net/PCI-E#PCI-E_Setup >>> >>> I doubt that most of these new routines will affect the problem >>> interfaces as they apply only to PCI-E core revisions 7 and 8. My >>> BCM4312 has rev 9. I do not know what versions are giving the >>> trouble. With SSB_DEBUG enabled, it will be in a log line as follows: >>> >>> ssb: Core 3 found: PCI-E (cc 0x820, rev 0x09, vendor 0x4243) >>> >>> If you are seeing the DMA error, please supply the above info. >>> >>> The "PCI-E Miscellaneous Configuration" routine that is not yet >>> finished does run on my system and is the source of the tracing >>> differences. If the problem cards has a revision newer than 9, I will >>> probably need an MMIO trace for your device. >> >> This is mine, the same revision as yours, but which demonstrates the >> DMA errors: >> >> ssb: Core 0 found: ChipCommon (cc 0x800, rev 0x16, vendor 0x4243) >> ssb: Core 1 found: IEEE 802.11 (cc 0x812, rev 0x0F, vendor 0x4243) >> ssb: Core 2 found: PCMCIA (cc 0x80D, rev 0x0A, vendor 0x4243) >> ssb: Core 3 found: PCI-E (cc 0x820, rev 0x09, vendor 0x4243) >> ssb: Found rev 1 PMU (capabilities 0x02A62F01) > > Larry, do you also have the same PMU? ssb: Found rev 1 PMU (capabilities 0x02A62F01) Yes - seems to be identical. Larry -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
