Re: How to force RC to forward p2p TLPs

2019-01-01 Thread Stephen Bates
n From: Eric Wehage Sent: December 31, 2018 11:20 PM To: Bjorn Helgaas; yu Cc: linux-...@vger.kernel.org; linux-kernel@vger.kernel.org; Logan Gunthorpe; Stephen Bates; Jonathan Cameron; Alexander Duyck Subject: RE: How to force RC to forward p2p TLPs   There is no method to force an RC

RE: How to force RC to forward p2p TLPs

2018-12-31 Thread Eric Wehage
linux-kernel@vger.kernel.org; Logan Gunthorpe ; Stephen Bates ; Jonathan Cameron ; Eric Wehage ; Alexander Duyck Subject: Re: How to force RC to forward p2p TLPs [+cc Logan, Stephen, Jonathan, Eric, Alex] On Sat, Dec 22, 2018 at 12:50:19PM +0800, yu wrote: > Hi all, > > We have a PCIE

Re: How to force RC to forward p2p TLPs

2018-12-29 Thread Logan Gunthorpe
On 2018-12-28 7:29 p.m., Bjorn Helgaas wrote: >> We use the p2p DMA to transfer data between these two endpoint SOCs, >> and if the host server is not enable ACS in BIOS, the p2p works well, >> but when ACS is enabled in BIOS, the p2p is always failed. With the >> help of a protocol analyzer, we

Re: How to force RC to forward p2p TLPs

2018-12-28 Thread Bjorn Helgaas
[+cc Logan, Stephen, Jonathan, Eric, Alex] On Sat, Dec 22, 2018 at 12:50:19PM +0800, yu wrote: > Hi all, > > We have a PCIE card which has a PEX8732 switch on-board, and there > are two endpoint SOCs like graphic decoder behind the switch, and by > default the ACS is enabled in 8732. > > We use