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Message-ID: <20230625120911.ws6eiywonoo5et7b@skbuf>
Date: Sun, 25 Jun 2023 15:09:11 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: Pawel Dembicki <paweldembicki@...il.com>
Cc: netdev@...r.kernel.org, Linus Walleij <linus.walleij@...aro.org>,
Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 3/7] net: dsa: vsc73xx: add
port_stp_state_set function
On Sun, Jun 25, 2023 at 01:53:38PM +0200, Pawel Dembicki wrote:
> This isn't fully functional implementation of 802.1D, but
> port_stp_state_set is required for future tag8021q operations.
>
> This implementation handle properly all states, but vsc 73xx don't
handles
vsc73xx doesn't
> forward STP packets.
>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>
> ---
> v2:
> - fix kdoc
>
> drivers/net/dsa/vitesse-vsc73xx-core.c | 51 +++++++++++++++++++++++---
> drivers/net/dsa/vitesse-vsc73xx.h | 2 +
> 2 files changed, 47 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
> index 221672b9e17f..f123ce2ed244 100644
> --- a/drivers/net/dsa/vitesse-vsc73xx-core.c
> +++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
> @@ -164,6 +164,10 @@
> #define VSC73XX_AGENCTRL 0xf0
> #define VSC73XX_CAPRST 0xff
>
> +#define VSC73XX_SRCMASKS_CPU_COPY BIT(27)
> +#define VSC73XX_SRCMASKS_MIRROR BIT(26)
> +#define VSC73XX_SRCMASKS_PORTS_MASK GENMASK(7, 0)
> +
> #define VSC73XX_MACACCESS_CPU_COPY BIT(14)
> #define VSC73XX_MACACCESS_FWD_KILL BIT(13)
> #define VSC73XX_MACACCESS_IGNORE_VLAN BIT(12)
> @@ -620,15 +624,17 @@ static int vsc73xx_setup(struct dsa_switch *ds)
> vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GMIIDELAY,
> VSC73XX_GMIIDELAY_GMII0_GTXDELAY_2_0_NS |
> VSC73XX_GMIIDELAY_GMII0_RXDELAY_2_0_NS);
> - /* Enable reception of frames on all ports */
> - vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_RECVMASK,
> - 0x5f);
> /* IP multicast flood mask (table 144) */
> vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_IFLODMSK,
> 0xff);
>
> mdelay(50);
>
> + /*configure forward map to CPU <-> port only*/
> + for (i = 0; i < vsc->ds->num_ports; i++)
> + vsc->forward_map[i] = VSC73XX_SRCMASKS_PORTS_MASK & BIT(CPU_PORT);
> + vsc->forward_map[CPU_PORT] = VSC73XX_SRCMASKS_PORTS_MASK & ~BIT(CPU_PORT);
> +
> /* Release reset from the internal PHYs */
> vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET,
> VSC73XX_GLORESET_PHY_RESET);
> @@ -871,9 +877,6 @@ static void vsc73xx_phylink_mac_link_up(struct dsa_switch *ds, int port,
> if (duplex == DUPLEX_FULL)
> val |= VSC73XX_MAC_CFG_FDX;
>
> - /* Enable port (forwarding) in the receieve mask */
> - vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> - VSC73XX_RECVMASK, BIT(port), BIT(port));
> vsc73xx_adjust_enable_port(vsc, port, val);
> }
>
> @@ -1040,6 +1043,41 @@ static int vsc73xx_get_max_mtu(struct dsa_switch *ds, int port)
> return 9600;
> }
>
> +static void vsc73xx_port_stp_state_set(struct dsa_switch *ds, int port,
> + u8 state)
> +{
> + struct vsc73xx *vsc = ds->priv;
Blank link after variable declarations; this affects comments too.
You can either put that comment above the function, or right above the
first "if" block (to me it makes more sense above the function).
> + /* FIXME: STP frames isn't forwarded at this moment. BPDU frames are
s/isn't/aren't/
> + * forwarded only from to PI/SI interface. For more info see chapter
s/from to/from and to/
> + * 2.7.1 (CPU Forwarding) in datasheet.
> + * This function is required for tag8021q operations.
> + */
> +
> + if (state == BR_STATE_BLOCKING)
state == BR_STATE_BLOCKING || state == BR_STATE_DISABLED
> + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> + VSC73XX_RECVMASK, BIT(port), 0);
> + else
> + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> + VSC73XX_RECVMASK, BIT(port), BIT(port));
> +
> + if (state == BR_STATE_LEARNING || state == BR_STATE_FORWARDING)
> + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> + VSC73XX_LEARNMASK, BIT(port), BIT(port));
> + else
> + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> + VSC73XX_LEARNMASK, BIT(port), 0);
> +
> + if (state == BR_STATE_FORWARDING)
> + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> + VSC73XX_SRCMASKS + port,
> + VSC73XX_SRCMASKS_PORTS_MASK,
> + vsc->forward_map[port]);
> + else
> + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> + VSC73XX_SRCMASKS + port,
> + VSC73XX_SRCMASKS_PORTS_MASK, 0);
> +}
> +
> static const struct dsa_switch_ops vsc73xx_ds_ops = {
> .get_tag_protocol = vsc73xx_get_tag_protocol,
> .setup = vsc73xx_setup,
> @@ -1056,6 +1094,7 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = {
> .port_disable = vsc73xx_port_disable,
> .port_change_mtu = vsc73xx_change_mtu,
> .port_max_mtu = vsc73xx_get_max_mtu,
> + .port_stp_state_set = vsc73xx_port_stp_state_set,
> };
>
> static int vsc73xx_gpio_get(struct gpio_chip *chip, unsigned int offset)
> diff --git a/drivers/net/dsa/vitesse-vsc73xx.h b/drivers/net/dsa/vitesse-vsc73xx.h
> index 30b1f0a36566..c4d5398edeeb 100644
> --- a/drivers/net/dsa/vitesse-vsc73xx.h
> +++ b/drivers/net/dsa/vitesse-vsc73xx.h
> @@ -5,6 +5,7 @@
>
> /**
> * struct vsc73xx - VSC73xx state container
> + * @forward_map: Forward table cache
> */
> struct vsc73xx {
> struct device *dev;
> @@ -15,6 +16,7 @@ struct vsc73xx {
> u8 addr[ETH_ALEN];
> const struct vsc73xx_ops *ops;
> void *priv;
> + u8 forward_map[8];
Can we have this 8 and the one from the vsc->ds->num_ports assignment
consolidated into a single macro, VSC73XX_MAX_NUM_PORTS?
> };
>
> struct vsc73xx_ops {
> --
> 2.34.1
>
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