Re: [PATCH 1/4] doc: clarify the existing net/ark guide

[Shepard Siegel <shepard.siegel@atomicrules.com>]

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Hi Ferruh,

Yes, there will probably be next versions in the future. If you don't mind
making the marker length adjustment, that would be great.

Regarding MBUF (re)sizing  - Arkville supports the ability to configure or
reconfigure the MBUF size used on a per-queue basis. This feature is useful
when the are conflicting motivations for using smaller/larger MBUF sizes.
For example, user can switch a queue to use a size best for that
queue's application workload.

-Shep


On Mon, Feb 13, 2023 at 10:46 AM Ferruh Yigit <ferruh.yigit@amd.com> wrote:

> On 2/13/2023 2:58 PM, Shepard Siegel wrote:
> > Add detail for the existing Arkville configurations FX0 and FX1.
> > Corrected minor errors of omission.
> >
> > Signed-off-by: Shepard Siegel <shepard.siegel@atomicrules.com>
> > ---
> >  doc/guides/nics/ark.rst | 18 ++++++++++++++++++
> >  1 file changed, 18 insertions(+)
> >
> > diff --git a/doc/guides/nics/ark.rst b/doc/guides/nics/ark.rst
> > index ba00f14e80..edaa02dc96 100644
> > --- a/doc/guides/nics/ark.rst
> > +++ b/doc/guides/nics/ark.rst
> > @@ -52,6 +52,10 @@ board. While specific capabilities such as number of
> physical
> >  hardware queue-pairs are negotiated; the driver is designed to
> >  remain constant over a broad and extendable feature set.
> >
> > +* FPGA Vendors Supported: AMD/Xilinx and Intel
> > +* Number of RX/TX Queue-Pairs: up to 128
> > +* PCIe Endpoint Technology: Gen3, Gen4, Gen5
> > +
> >  Intentionally, Arkville by itself DOES NOT provide common NIC
> >  capabilities such as offload or receive-side scaling (RSS).
> >  These capabilities would be viewed as a gate-level "tax" on
> > @@ -303,6 +307,18 @@ ARK PMD supports the following Arkville RTL PCIe
> instances including:
> >  * ``1d6c:101e`` - AR-ARKA-FX1 [Arkville 64B DPDK Data Mover for Agilex
> R-Tile]
> >  * ``1d6c:101f`` - AR-TK242 [2x100GbE Packet Capture Device]
> >
> > +Arkville RTL Core Configurations
> > +-------------------------------------
> > +
>
> The title marker length (-) should be same as title length, can you
> please fix if there will be next version, if not I can fix while merging.
>
>
> > +Arkville's RTL core may be configured by the user with different
> > +datapath widths to balance throughput against FPGA logic area. The ARK
> PMD
> > +has introspection on the RTL core configuration and acts accordingly.
> > +All Arkville configurations present identical RTL user-facing AXI stream
> > +interfaces for both AMD/Xilinx and Intel FPGAs.
> > +
> > +* ARK-FX0 - 256-bit 32B datapath (PCIe Gen3, Gen4)
> > +* ARK-FX1 - 512-bit 64B datapath (PCIe Gen3, Gen4, Gen5)
> > +
> >  DPDK and Arkville Firmware Versioning
> >  -------------------------------------
> >
> > @@ -334,6 +350,8 @@ Supported Features
> >  ------------------
> >
> >  * Dynamic ARK PMD extensions
> > +* Dynamic per-queue MBUF (re)sizing up to 32KB
>
> What is this feature? What does it mean to size/resize mbuf dynamically?
>
> > +* SR-IOV, VF-based queue-segregation
> >  * Multiple receive and transmit queues
> >  * Jumbo frames up to 9K
> >  * Hardware Statistics
>
>

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