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Miller" , Eric Dumazet , Jakub Kicinski , Claudiu Manoil , Alexandre Belloni , UNGLinuxDriver@microchip.com, Russell King , linux-kernel@vger.kernel.org Subject: [PATCH net-next v4 01/12] net: dsa: vsc73xx: add port_stp_state_set function Date: Sat, 13 Jul 2024 23:16:07 +0200 Message-Id: <20240713211620.1125910-2-paweldembicki@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240713211620.1125910-1-paweldembicki@gmail.com> References: <20240713211620.1125910-1-paweldembicki@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org This isn't a fully functional implementation of 802.1D, but port_stp_state_set is required for a future tag8021q operations. This implementation handles properly all states, but vsc73xx doesn't forward STP packets. Reviewed-by: Linus Walleij Reviewed-by: Florian Fainelli Reviewed-by: Vladimir Oltean Signed-off-by: Pawel Dembicki --- v4-v1: - resend only --- Before patch series split: https://patchwork.kernel.org/project/netdevbpf/list/?series=841034&state=%2A&archive=both v7: - implement 'vsc73xx_refresh_fwd_map' simplification v6: - fix inconsistent indenting v5: - remove unneeded 'RECVMASK' operations - reorganise vsc73xx_refresh_fwd_map function v4: - fully reworked port_stp_state_set v3: - use 'VSC73XX_MAX_NUM_PORTS' define - add 'state == BR_STATE_DISABLED' condition - fix style issues v2: - fix kdoc --- drivers/net/dsa/vitesse-vsc73xx-core.c | 96 +++++++++++++++++++++++--- 1 file changed, 85 insertions(+), 11 deletions(-) diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c index 4b031fefcec6..ebeea259f019 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) @@ -623,9 +627,6 @@ 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); @@ -788,10 +789,6 @@ static void vsc73xx_mac_link_down(struct phylink_config *config, /* Allow backward dropping of frames from this port */ vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, VSC73XX_SBACKWDROP, BIT(port), BIT(port)); - - /* Receive mask (disable forwarding) */ - vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, - VSC73XX_RECVMASK, BIT(port), 0); } static void vsc73xx_mac_link_up(struct phylink_config *config, @@ -844,10 +841,6 @@ static void vsc73xx_mac_link_up(struct phylink_config *config, vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, VSC73XX_ARBDISC, BIT(port), 0); - /* Enable port (forwarding) in the receive mask */ - vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, - VSC73XX_RECVMASK, BIT(port), BIT(port)); - /* Disallow backward dropping of frames from this port */ vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, VSC73XX_SBACKWDROP, BIT(port), 0); @@ -1039,6 +1032,86 @@ static void vsc73xx_phylink_get_caps(struct dsa_switch *dsa, int port, config->mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000; } +static void vsc73xx_refresh_fwd_map(struct dsa_switch *ds, int port, u8 state) +{ + struct dsa_port *other_dp, *dp = dsa_to_port(ds, port); + struct vsc73xx *vsc = ds->priv; + u16 mask; + + if (state != BR_STATE_FORWARDING) { + /* Ports that aren't in the forwarding state must not + * forward packets anywhere. + */ + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, + VSC73XX_SRCMASKS + port, + VSC73XX_SRCMASKS_PORTS_MASK, 0); + + dsa_switch_for_each_available_port(other_dp, ds) { + if (other_dp == dp) + continue; + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, + VSC73XX_SRCMASKS + other_dp->index, + BIT(port), 0); + } + + return; + } + + /* Forwarding ports must forward to the CPU and to other ports + * in the same bridge + */ + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, + VSC73XX_SRCMASKS + CPU_PORT, BIT(port), BIT(port)); + + mask = BIT(CPU_PORT); + + dsa_switch_for_each_user_port(other_dp, ds) { + int other_port = other_dp->index; + + if (port == other_port || !dsa_port_bridge_same(dp, other_dp) || + other_dp->stp_state != BR_STATE_FORWARDING) + continue; + + mask |= BIT(other_port); + + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, + VSC73XX_SRCMASKS + other_port, + BIT(port), BIT(port)); + } + + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, + VSC73XX_SRCMASKS + port, + VSC73XX_SRCMASKS_PORTS_MASK, mask); +} + +/* FIXME: STP frames aren't forwarded at this moment. BPDU frames are + * forwarded only from and to PI/SI interface. For more info see chapter + * 2.7.1 (CPU Forwarding) in datasheet. + * This function is required for tag_8021q operations. + */ +static void vsc73xx_port_stp_state_set(struct dsa_switch *ds, int port, + u8 state) +{ + struct vsc73xx *vsc = ds->priv; + u32 val; + + val = (state == BR_STATE_BLOCKING || state == BR_STATE_DISABLED) ? + 0 : BIT(port); + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, + VSC73XX_RECVMASK, BIT(port), val); + + val = (state == BR_STATE_LEARNING || state == BR_STATE_FORWARDING) ? + BIT(port) : 0; + vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, + VSC73XX_LEARNMASK, BIT(port), val); + + /* CPU Port should always forward packets when user ports are forwarding + * so let's configure it from other ports only. + */ + if (port != CPU_PORT) + vsc73xx_refresh_fwd_map(ds, port, state); +} + static const struct phylink_mac_ops vsc73xx_phylink_mac_ops = { .mac_config = vsc73xx_mac_config, .mac_link_down = vsc73xx_mac_link_down, @@ -1057,6 +1130,7 @@ 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, .phylink_get_caps = vsc73xx_phylink_get_caps, };