> -----Original Message----- > From: Wu, Hao <hao.wu@xxxxxxxxx> > Sent: Wednesday, February 16, 2022 11:35 AM > To: Zhang, Tianfei <tianfei.zhang@xxxxxxxxx>; trix@xxxxxxxxxx; > mdf@xxxxxxxxxx; Xu, Yilun <yilun.xu@xxxxxxxxx>; linux-fpga@xxxxxxxxxxxxxxx; > linux-doc@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx > Cc: corbet@xxxxxxx > Subject: Re: [PATCH v1 1/7] Documentation: fpga: dfl: add description of IOFS > > > Subject: [PATCH v1 1/7] Documentation: fpga: dfl: add description of > > IOFS > > > > From: Tianfei Zhang <tianfei.zhang@xxxxxxxxx> > > > > This patch adds description about IOFS support for DFL. > > > > Signed-off-by: Tianfei Zhang <tianfei.zhang@xxxxxxxxx> > > --- > > Documentation/fpga/dfl.rst | 99 > > +++++++++++++++++++++++++++++++++++++- > > 1 file changed, 97 insertions(+), 2 deletions(-) > > > > diff --git a/Documentation/fpga/dfl.rst b/Documentation/fpga/dfl.rst > > index ef9eec71f6f3..6f9eae1c1697 100644 > > --- a/Documentation/fpga/dfl.rst > > +++ b/Documentation/fpga/dfl.rst > > @@ -58,7 +58,10 @@ interface to FPGA, e.g. the FPGA Management Engine > > (FME) and Port (more > > descriptions on FME and Port in later sections). > > > > Accelerated Function Unit (AFU) represents an FPGA programmable > > region and -always connects to a FIU (e.g. a Port) as its child as illustrated > above. > > +always connects to a FIU (e.g. a Port) as its child as illustrated > > +above, but on IOFS design, it introducing Port Gasket which contains > > +AFUs. For DFL > > perspective, > > +the Next_AFU pointer on FIU feature header can point to NULL so the > > +AFU is > > not > > +connects to a FIU(more descriptions on IOFS in later section). > > > > Private Features represent sub features of the FIU and AFU. They > > could be various function blocks with different IDs, but all private > > features which @@ -134,6 +137,9 @@ reconfigurable region containing an > > AFU. It controls the communication from SW to the accelerator and > > exposes features such as reset and debug. Each FPGA device may have > > more than one port, but always one AFU per port. > > > > +On IOFS, it introducing a new hardware unit, Port Gasket, which > > +contains all the PR specific modules and regions (more descriptions on IOFS in > later section). > > What's the different between the PORT we have now for DFH, and the new one > in IOFS?
