netdev - Re: [PATCH net-next v6 3/7] ixgbe: Add a RETA query command to VF-PF channel API

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Message-ID: <1427106650.2577.160.camel@jtkirshe-mobl>
Date:	Mon, 23 Mar 2015 03:30:50 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	Vlad Zolotarov <vladz@...udius-systems.com>
Cc:	netdev@...r.kernel.org, avi@...udius-systems.com,
	gleb@...udius-systems.com
Subject: Re: [PATCH net-next v6 3/7] ixgbe: Add a RETA query command to
 VF-PF channel API

On Sun, 2015-03-22 at 21:01 +0200, Vlad Zolotarov wrote:
> 82599 and x540 VFs and PF share the same RSS redirection table (RETA).
> Therefore we
> just return it for all VFs. x550 on the other hand provides a separate
> redirection
> table for each VF (there is a per-pool RETA table).
> 
> For 82599 and x540 RETA table is an array of 32 registers (128 bytes)
> and the maximum number of
> registers that may be delivered in a single VF-PF channel command is
> 15. Therefore
> we will deliver the whole table in 3 steps: 12, 12 and 8 registers in
> each
> step correspondingly.
> 
> For x550 VFs RETA is a 64 byte array, so we may deliver it in two
> steps: 12 and 4 registers
> correspondingly.
> 
> Thus this patch does the following:
> 
>   - Adds a new API version (to specify a new commands set).
>   - Adds the IXGBE_VF_GET_RETA command to the VF-PF commands set.
> 
> Signed-off-by: Vlad Zolotarov <vladz@...udius-systems.com>
> ---
> New in v5:
>    - Use the newly added netdev op to allow/prevent the RETA query on
> a per-VF basis.
> 
> New in v4:
>    - Deleted an empty line in ixgbe_get_vf_reta() switch-case.
> 
> New in v3:
>    - Pass the number of dwords and offset in RETA in the
> IXGBE_VF_GET_RETA request message.
>      This allows to reduce the added command set to a single command.
>    - Added a support for all devices supported by the ixgbe driver
> that have
>      SR-IOV functions support: 82599, x540 and x550. The original code
> supported
>      only 82599 and x540.
>    - Added the masking of the RETA entries according to the
> PSRTYPE[n].RQPL
>      value.
> 
> New in v1 (compared to RFC):
>    - Use "if-else" statement instead of a "switch-case" for a single
> option case
>      (in ixgbe_get_vf_reta()).
> ---
>  drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h   |  8 ++++
>  drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 65
> ++++++++++++++++++++++++++
>  2 files changed, 73 insertions(+)

Thanks Vlad, I have applied your patch to my next-queue tree
-- 
git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue.git
dev-queue

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