netdev - Re: [PATCH v9 00/15] octeontx2-af: Add RVU Admin Function driver

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Date:   Wed, 10 Oct 2018 10:07:31 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     sunil.kovvuri@...il.com
Cc:     netdev@...r.kernel.org, arnd@...db.de, linux-soc@...r.kernel.org,
        sgoutham@...vell.com
Subject: Re: [PATCH v9 00/15] octeontx2-af: Add RVU Admin Function driver

From: sunil.kovvuri@...il.com
Date: Wed, 10 Oct 2018 18:14:20 +0530

> Resource virtualization unit (RVU) on Marvell's OcteonTX2 SOC maps HW
> resources from the network, crypto and other functional blocks into
> PCI-compatible physical and virtual functions. Each functional block
> again has multiple local functions (LFs) for provisioning to PCI devices.
> RVU supports multiple PCIe SRIOV physical functions (PFs) and virtual
> functions (VFs). PF0 is called the administrative / admin function (AF)
> and has privileges to provision RVU functional block's LFs to each of the
> PF/VF.
> 
> RVU managed networking functional blocks
>  - Network pool allocator (NPA)
>  - Network interface controller (NIX)
>  - Network parser CAM (NPC)
>  - Schedule/Synchronize/Order unit (SSO)
> 
> RVU managed non-networking functional blocks
>  - Crypto accelerator (CPT)
>  - Scheduled timers unit (TIM)
>  - Schedule/Synchronize/Order unit (SSO)
>    Used for both networking and non networking usecases
>  - Compression (upcoming in future variants of the silicons)
> 
> Resource provisioning examples
>  - A PF/VF with NIX-LF & NPA-LF resources works as a pure network device
>  - A PF/VF with CPT-LF resource works as a pure cyrpto offload device.
> 
> This admin function driver neither receives any data nor processes it i.e
> no I/O, a configuration only driver.
> 
> PF/VFs communicates with AF via a shared memory region (mailbox). Upon
> receiving requests from PF/VF, AF does resource provisioning and other
> HW configuration. AF is always attached to host, but PF/VFs may be used
> by host kernel itself, or attached to VMs or to userspace applications
> like DPDK etc. So AF has to handle provisioning/configuration requests
> sent by any device from any domain.
> 
> This patch series adds logic for the following
>  - RVU AF driver with functional blocks provisioning support.
>  - Mailbox infrastructure for communication between AF and PFs.
>  - CGX (MAC controller) driver which communicates with firmware for
>    managing  physical ethernet interfaces. AF collects info from this
>    driver and forwards the same to the PF/VFs uaing these interfaces.
> 
> This is the first set of patches out of 80+ patches.

Series applied.

Please address Arnd's feedback about your usleep based timeout loops
as a follow-on.

Thank you.