On 11/21/2016 06:10 PM, Lamar Hansford wrote:
Hello, I am using a Terga 30 with multiple PCIe cards. I am experiencing a hard (non-recoverable) lock-up which occurs whenever the following wr/rd sequence is followed: * wr(a) -> rd(a) Where you write then immediately read the same address. Validated by GPIO write before and after (2nd GPIO change never happens). I have removed this sequence from my driver (ath9k) and the device is stable for days with a single card. However, when (multiple cards are added (same type) the lock-up still occurs. It appears that the AXI bus is hung, preventing execution by any of the cores. I see that there is a register FPCI_TIMEOUT defined in the spec. I hope that by enabling the bus timeout I can get the system to gracefully recover. But I cannot determine which register location it is mapped to.
The Tegra124 manual puts it at 0xd8, and other addresses around it seem to match ones in the driver, so you might try that. The Tegra124 manual also has the descriptions for the bits (31 and 19..0) swapped which does make more sense. No idea what it's supposed to do, really :)
* Is this an internally mapped setting? * If not what register? Is there a way to set this I do see where the interrupt can be enabled but not the FPCI Timeout register itself (section 32.4.1.1). Any help would be appreciated, -Lamar
Cheers, Mikko. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
