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

How to force RC to forward p2p TLPs

2018-12-22 Thread yu
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 the p2p DMA to transfer data between these two endpoint SOCs, and if the host server is not enable ACS in BIO