netdev - Re: [PATCH net v1 2/6] net: dsa: microchip: ksz8: fix ksz8_fdb

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Date:   Fri, 24 Mar 2023 03:51:48 +0000
From:   <Arun.Ramadoss@...rochip.com>
To:     <olteanv@...il.com>, <andrew@...n.ch>, <f.fainelli@...il.com>,
        <kuba@...nel.org>, <edumazet@...gle.com>, <pabeni@...hat.com>,
        <o.rempel@...gutronix.de>, <Woojung.Huh@...rochip.com>,
        <davem@...emloft.net>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <UNGLinuxDriver@...rochip.com>, <kernel@...gutronix.de>
Subject: Re: [PATCH net v1 2/6] net: dsa: microchip: ksz8: fix ksz8_fdb_dump()
 to extract all 1024 entries

Hi Oleksij,

On Wed, 2023-03-22 at 15:31 +0100, Oleksij Rempel wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you
> know the content is safe
> 
> Current ksz8_fdb_dump() is able to extract only max 249 entries on
> the ksz8863/ksz8873 series of switches. This happened due to wrong
> bit mask and offset calculation.
> 
> This commit corrects the issue and allows for the complete extraction
> of
> all 1024 entries.
> 
> Fixes: d23a5e18606c ("net: dsa: microchip: move ksz8->masks to
> ksz_common")
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> ---
>  drivers/net/dsa/microchip/ksz_common.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/dsa/microchip/ksz_common.c
> b/drivers/net/dsa/microchip/ksz_common.c
> index 7fc2155d93d6..3a1afc9f4621 100644
> --- a/drivers/net/dsa/microchip/ksz_common.c
> +++ b/drivers/net/dsa/microchip/ksz_common.c
> @@ -407,10 +407,10 @@ static const u32 ksz8863_masks[] = {
>         [STATIC_MAC_TABLE_FID]          = GENMASK(29, 26),
>         [STATIC_MAC_TABLE_OVERRIDE]     = BIT(20),
>         [STATIC_MAC_TABLE_FWD_PORTS]    = GENMASK(18, 16),
> -       [DYNAMIC_MAC_TABLE_ENTRIES_H]   = GENMASK(5, 0),
> +       [DYNAMIC_MAC_TABLE_ENTRIES_H]   = GENMASK(1, 0),
>         [DYNAMIC_MAC_TABLE_MAC_EMPTY]   = BIT(7),
>         [DYNAMIC_MAC_TABLE_NOT_READY]   = BIT(7),
> -       [DYNAMIC_MAC_TABLE_ENTRIES]     = GENMASK(31, 28),
> +       [DYNAMIC_MAC_TABLE_ENTRIES]     = GENMASK(31, 24),
>         [DYNAMIC_MAC_TABLE_FID]         = GENMASK(19, 16),
>         [DYNAMIC_MAC_TABLE_SRC_PORT]    = GENMASK(21, 20),
>         [DYNAMIC_MAC_TABLE_TIMESTAMP]   = GENMASK(23, 22),
> @@ -420,7 +420,7 @@ static u8 ksz8863_shifts[] = {
>         [VLAN_TABLE_MEMBERSHIP_S]       = 16,
>         [STATIC_MAC_FWD_PORTS]          = 16,
>         [STATIC_MAC_FID]                = 22,
> -       [DYNAMIC_MAC_ENTRIES_H]         = 3,
> +       [DYNAMIC_MAC_ENTRIES_H]         = 8,
>         [DYNAMIC_MAC_ENTRIES]           = 24,
>         [DYNAMIC_MAC_FID]               = 16,
>         [DYNAMIC_MAC_TIMESTAMP]         = 24,

Cross verified the above entries with datasheet. 

As Jakub mentioned, above fix commit is just code movement from
ksz8795.c to ksz_common. 

Other than Fix commit, patch Looks good to me.

Acked-by: Arun Ramadoss <arun.ramadoss@...rochip.com>

> --
> 2.30.2
>