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[92.34.204.253]) by smtp.gmail.com with ESMTPSA id k28sm2083577ljn.57.2021.10.05.12.49.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Oct 2021 12:49:16 -0700 (PDT) From: Linus Walleij To: Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , "David S . Miller" , Jakub Kicinski Cc: netdev@vger.kernel.org, Linus Walleij , =?utf-8?q?Alvin_=C5=A0ipraga?= , Mauri Sandberg , DENG Qingfang Subject: [PATCH net-next 3/3 v5] net: dsa: rtl8366rb: Support setting STP state Date: Tue, 5 Oct 2021 21:47:04 +0200 Message-Id: <20211005194704.342329-4-linus.walleij@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211005194704.342329-1-linus.walleij@linaro.org> References: <20211005194704.342329-1-linus.walleij@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This adds support for setting the STP state to the RTL8366RB DSA switch. This rids the following message from the kernel on e.g. OpenWrt: DSA: failed to set STP state 3 (-95) Since the RTL8366RB has one STP state register per FID with two bit per port in each, we simply loop over all the FIDs and set the state on all of them. Cc: Vladimir Oltean Cc: Alvin Šipraga Cc: Mauri Sandberg Cc: DENG Qingfang Signed-off-by: Linus Walleij --- ChangeLog v4->v5: - Rename register from RTL8368S* to RTL8366RB as all other registers. (RTL8368S is some similar ASIC maybe the same.) - Rename registers from "SPT" to "STP", we assume this is just a typo in the vendor tree. - Create RTL8366RB_STP_STATE_MASK() and RTL8366RB_STP_STATE() macros and use these. ChangeLog v1->v4: - New patch after discovering that we can do really nice bridge offloading with these bits. --- drivers/net/dsa/rtl8366rb.c | 48 +++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) -- 2.31.1 Reviewed-by: Vladimir Oltean diff --git a/drivers/net/dsa/rtl8366rb.c b/drivers/net/dsa/rtl8366rb.c index c78e4220ddd1..d2370cda4be0 100644 --- a/drivers/net/dsa/rtl8366rb.c +++ b/drivers/net/dsa/rtl8366rb.c @@ -110,6 +110,18 @@ #define RTL8366RB_POWER_SAVING_REG 0x0021 +/* Spanning tree status (STP) control, two bits per port per FID */ +#define RTL8366RB_STP_STATE_BASE 0x0050 /* 0x0050..0x0057 */ +#define RTL8366RB_STP_STATE_DISABLED 0x0 +#define RTL8366RB_STP_STATE_BLOCKING 0x1 +#define RTL8366RB_STP_STATE_LEARNING 0x2 +#define RTL8366RB_STP_STATE_FORWARDING 0x3 +#define RTL8366RB_STP_MASK GENMASK(1, 0) +#define RTL8366RB_STP_STATE(port, state) \ + ((state) << ((port) * 2)) +#define RTL8366RB_STP_STATE_MASK(port) \ + RTL8366RB_STP_STATE((port), RTL8366RB_STP_MASK) + /* CPU port control reg */ #define RTL8368RB_CPU_CTRL_REG 0x0061 #define RTL8368RB_CPU_PORTS_MSK 0x00FF @@ -234,6 +246,7 @@ #define RTL8366RB_NUM_LEDGROUPS 4 #define RTL8366RB_NUM_VIDS 4096 #define RTL8366RB_PRIORITYMAX 7 +#define RTL8366RB_NUM_FIDS 8 #define RTL8366RB_FIDMAX 7 #define RTL8366RB_PORT_1 BIT(0) /* In userspace port 0 */ @@ -1308,6 +1321,40 @@ rtl8366rb_port_bridge_flags(struct dsa_switch *ds, int port, return 0; } +static void +rtl8366rb_port_stp_state_set(struct dsa_switch *ds, int port, u8 state) +{ + struct realtek_smi *smi = ds->priv; + u32 val; + int i; + + switch (state) { + case BR_STATE_DISABLED: + val = RTL8366RB_STP_STATE_DISABLED; + break; + case BR_STATE_BLOCKING: + case BR_STATE_LISTENING: + val = RTL8366RB_STP_STATE_BLOCKING; + break; + case BR_STATE_LEARNING: + val = RTL8366RB_STP_STATE_LEARNING; + break; + case BR_STATE_FORWARDING: + val = RTL8366RB_STP_STATE_FORWARDING; + break; + default: + dev_err(smi->dev, "unknown bridge state requested\n"); + return; + }; + + /* Set the same status for the port on all the FIDs */ + for (i = 0; i < RTL8366RB_NUM_FIDS; i++) { + regmap_update_bits(smi->map, RTL8366RB_STP_STATE_BASE + i, + RTL8366RB_STP_STATE_MASK(port), + RTL8366RB_STP_STATE(port, val)); + } +} + static void rtl8366rb_port_fast_age(struct dsa_switch *ds, int port) { @@ -1733,6 +1780,7 @@ static const struct dsa_switch_ops rtl8366rb_switch_ops = { .port_disable = rtl8366rb_port_disable, .port_pre_bridge_flags = rtl8366rb_port_pre_bridge_flags, .port_bridge_flags = rtl8366rb_port_bridge_flags, + .port_stp_state_set = rtl8366rb_port_stp_state_set, .port_fast_age = rtl8366rb_port_fast_age, .port_change_mtu = rtl8366rb_change_mtu, .port_max_mtu = rtl8366rb_max_mtu,