On 01/17/2016 04:07 PM, Mateusz Kulikowski wrote:
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Hi Gilbert,
Small update from my side - It took me a while to setup x86_64 machine,
but today was finally able to do test.
My result are the same as Larry:
I got my board running for ~4 hours and there was no disconnect.
For part of the time I was doing (some) activity, for around hour machine
was idle.
I also did suspend-resume cycle.
System: Ubuntu 15.04 (from usb stick), kernel 3.19.0-15-generic, x86_64
Machine: MSI AM1I, Sempron 2650,
PCIe to mini-pcie "wifi" bridge (with antenna connector and proper RFKILL
wiring).
Are you able to do more troubleshooting?
Perhaps try different AP/Channel/mode, (dis)connect power cable from laptop etc.
I'll try to make another reproduction attempt, as without being able
to reproduce it I will probably not be able to fix it.
The problem only shows up when you hit the NIC hard. Try downloading a large
file while browsing.
Some info from the Realtek engineer:
=============================
About 92EE's 64 bit mode (PCI DAC), there are three roles -- (PCI host, PCI
device, TRX desc).
All possible combinations are:
(32, 32, 32)
(64, 64, 64)
(32, 32, 64) <== special one
To setup 64 bit mode, please use followings:
1. PCI host
pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
2. PCI device
configuration space 0x719[5] = 1 indicate 64 bit mode
3. TRX desc
register 0x382[15] = 1 indicate 64 bits mode
If we turn on DMA_IS_64BIT, it will be the combination (32, 32, 64).
It is rare to use because of 32 bit DMA address (SAC), but I think it will be work.
We may extend DMA_IS_64BIT to the combination (64, 64, 64) to be meaningful.
=============================
I did the easy step by effectively turning on DMA_IS_64BIT, and the driver
failed. I have not had time to investigate any other of the 64-bit fixes.
Larry
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