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[193.12.47.89]) by smtp.gmail.com with ESMTPSA id v22sm2977292ljd.9.2020.11.30.06.06.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Nov 2020 06:06:26 -0800 (PST) From: Tobias Waldekranz To: davem@davemloft.net, kuba@kernel.org Cc: andrew@lunn.ch, vivien.didelot@gmail.com, f.fainelli@gmail.com, olteanv@gmail.com, j.vosburgh@gmail.com, vfalico@gmail.com, andy@greyhouse.net, netdev@vger.kernel.org Subject: [PATCH v2 net-next 3/4] net: dsa: mv88e6xxx: Link aggregation support Date: Mon, 30 Nov 2020 15:06:09 +0100 Message-Id: <20201130140610.4018-4-tobias@waldekranz.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201130140610.4018-1-tobias@waldekranz.com> References: <20201130140610.4018-1-tobias@waldekranz.com> Organization: Westermo Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Support offloading of LAGs to hardware. LAGs may be attached to a bridge in which case VLANs, multicast groups, etc. are also offloaded as usual. Signed-off-by: Tobias Waldekranz --- drivers/net/dsa/mv88e6xxx/chip.c | 234 +++++++++++++++++++++++++++- drivers/net/dsa/mv88e6xxx/chip.h | 4 + drivers/net/dsa/mv88e6xxx/global2.c | 8 +- drivers/net/dsa/mv88e6xxx/global2.h | 5 + drivers/net/dsa/mv88e6xxx/port.c | 21 +++ drivers/net/dsa/mv88e6xxx/port.h | 5 + 6 files changed, 269 insertions(+), 8 deletions(-) diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index e7f68ac0c7e3..3c4b795ac7e4 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -1189,7 +1189,8 @@ static int mv88e6xxx_set_mac_eee(struct dsa_switch *ds, int port, } /* Mask of the local ports allowed to receive frames from a given fabric port */ -static u16 mv88e6xxx_port_vlan(struct mv88e6xxx_chip *chip, int dev, int port) +static u16 mv88e6xxx_port_vlan(struct mv88e6xxx_chip *chip, int dev, int port, + struct dsa_lag **lag) { struct dsa_switch *ds = chip->ds; struct dsa_switch_tree *dst = ds->dst; @@ -1201,6 +1202,9 @@ static u16 mv88e6xxx_port_vlan(struct mv88e6xxx_chip *chip, int dev, int port) list_for_each_entry(dp, &dst->ports, list) { if (dp->ds->index == dev && dp->index == port) { found = true; + + if (dp->lag && lag) + *lag = dp->lag; break; } } @@ -1231,7 +1235,9 @@ static u16 mv88e6xxx_port_vlan(struct mv88e6xxx_chip *chip, int dev, int port) static int mv88e6xxx_port_vlan_map(struct mv88e6xxx_chip *chip, int port) { - u16 output_ports = mv88e6xxx_port_vlan(chip, chip->ds->index, port); + u16 output_ports; + + output_ports = mv88e6xxx_port_vlan(chip, chip->ds->index, port, NULL); /* prevent frames from going back out of the port they came in on */ output_ports &= ~BIT(port); @@ -1389,14 +1395,21 @@ static int mv88e6xxx_mac_setup(struct mv88e6xxx_chip *chip) static int mv88e6xxx_pvt_map(struct mv88e6xxx_chip *chip, int dev, int port) { + struct dsa_lag *lag = NULL; u16 pvlan = 0; if (!mv88e6xxx_has_pvt(chip)) return 0; /* Skip the local source device, which uses in-chip port VLAN */ - if (dev != chip->ds->index) - pvlan = mv88e6xxx_port_vlan(chip, dev, port); + if (dev != chip->ds->index) { + pvlan = mv88e6xxx_port_vlan(chip, dev, port, &lag); + + if (lag) { + dev = MV88E6XXX_G2_PVT_ADRR_DEV_TRUNK; + port = lag->id; + } + } return mv88e6xxx_g2_pvt_write(chip, dev, port, pvlan); } @@ -5368,6 +5381,207 @@ static int mv88e6xxx_port_egress_floods(struct dsa_switch *ds, int port, return err; } +static int mv88e6xxx_lag_sync_map(struct dsa_switch *ds, struct dsa_lag *lag) +{ + struct mv88e6xxx_chip *chip = ds->priv; + struct dsa_port *dp; + u16 map = 0; + + /* Build the map of all ports to distribute flows destined for + * this LAG. This can be either a local user port, or a DSA + * port if the LAG port is on a remote chip. + */ + list_for_each_entry(dp, &lag->ports, lag_list) { + map |= BIT(dsa_towards_port(ds, dp->ds->index, dp->index)); + } + + return mv88e6xxx_g2_trunk_mapping_write(chip, lag->id, map); +} + +static const u8 mv88e6xxx_lag_mask_table[8][8] = { + /* Row number corresponds to the number of active members in a + * LAG. Each column states which of the eight hash buckets are + * mapped to the column:th port in the LAG. + * + * Example: In a LAG with three active ports, the second port + * ([2][1]) would be selected for traffic mapped to buckets + * 3,4,5 (0x38). + */ + { 0xff, 0, 0, 0, 0, 0, 0, 0 }, + { 0x0f, 0xf0, 0, 0, 0, 0, 0, 0 }, + { 0x07, 0x38, 0xc0, 0, 0, 0, 0, 0 }, + { 0x03, 0x0c, 0x30, 0xc0, 0, 0, 0, 0 }, + { 0x03, 0x0c, 0x30, 0x40, 0x80, 0, 0, 0 }, + { 0x03, 0x0c, 0x10, 0x20, 0x40, 0x80, 0, 0 }, + { 0x03, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0 }, + { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }, +}; + +static void mv88e6xxx_lag_set_port_mask(u16 *mask, int port, + int num_tx, int nth) +{ + u8 active = 0; + int i; + + num_tx = num_tx <= 8 ? num_tx : 8; + if (nth < num_tx) + active = mv88e6xxx_lag_mask_table[num_tx - 1][nth]; + + for (i = 0; i < 8; i++) { + if (BIT(i) & active) + mask[i] |= BIT(port); + } +} + +static int mv88e6xxx_lag_sync_masks(struct dsa_switch *ds) +{ + struct mv88e6xxx_chip *chip = ds->priv; + struct dsa_port *dp; + struct dsa_lag *lag; + int i, id, err, nth; + u16 mask[8] = { 0 }; + u16 ivec; + + /* Assume no port is a member of any LAG. */ + ivec = BIT(mv88e6xxx_num_ports(chip)) - 1; + + /* Disable all masks for ports that _are_ members of a LAG. */ + dsa_lag_foreach(id, ds->dst) { + lag = dsa_lag_by_id(ds->dst, id); + list_for_each_entry(dp, &lag->ports, lag_list) { + if (dp->ds != ds) + continue; + + ivec &= ~BIT(dp->index); + } + } + + for (i = 0; i < 8; i++) + mask[i] = ivec; + + /* Enable the correct subset of masks for all LAG ports that + * are in the Tx set. + */ + dsa_lag_foreach(id, ds->dst) { + lag = dsa_lag_by_id(ds->dst, id); + if (!lag->num_tx) + continue; + + nth = 0; + list_for_each_entry(dp, &lag->tx_ports, lag_tx_list) { + if (dp->ds == ds) + mv88e6xxx_lag_set_port_mask(mask, dp->index, + lag->num_tx, nth); + + nth++; + } + } + + for (i = 0; i < 8; i++) { + err = mv88e6xxx_g2_trunk_mask_write(chip, i, true, mask[i]); + if (err) + return err; + } + + return 0; +} + +static int mv88e6xxx_lag_sync_masks_map(struct dsa_switch *ds, + struct dsa_lag *lag) +{ + int err; + + err = mv88e6xxx_lag_sync_masks(ds); + + if (!err) + err = mv88e6xxx_lag_sync_map(ds, lag); + + return err; +} + +static int mv88e6xxx_port_lag_change(struct dsa_switch *ds, int port, + struct netdev_lag_lower_state_info *info) +{ + struct mv88e6xxx_chip *chip = ds->priv; + int err; + + mv88e6xxx_reg_lock(chip); + err = mv88e6xxx_lag_sync_masks(ds); + mv88e6xxx_reg_unlock(chip); + return err; +} + +static int mv88e6xxx_port_lag_join(struct dsa_switch *ds, int port, + struct net_device *lag_dev) +{ + struct dsa_lag *lag = dsa_to_port(ds, port)->lag; + struct mv88e6xxx_chip *chip = ds->priv; + int err; + + mv88e6xxx_reg_lock(chip); + + err = mv88e6xxx_port_set_trunk(chip, port, true, lag->id); + if (err) + goto unlock; + + err = mv88e6xxx_lag_sync_masks_map(ds, lag); + if (err) + mv88e6xxx_port_set_trunk(chip, port, false, 0); + +unlock: + mv88e6xxx_reg_unlock(chip); + return err; +} + +static void mv88e6xxx_port_lag_leave(struct dsa_switch *ds, int port, + struct net_device *lag_dev) +{ + struct dsa_lag *lag = dsa_to_port(ds, port)->lag; + struct mv88e6xxx_chip *chip = ds->priv; + + mv88e6xxx_reg_lock(chip); + mv88e6xxx_lag_sync_masks_map(ds, lag); + mv88e6xxx_port_set_trunk(chip, port, false, 0); + mv88e6xxx_reg_unlock(chip); +} + +static int mv88e6xxx_crosschip_lag_change(struct dsa_switch *ds, int sw_index, + int port, struct net_device *lag_dev, + struct netdev_lag_lower_state_info *info) +{ + struct mv88e6xxx_chip *chip = ds->priv; + int err; + + mv88e6xxx_reg_lock(chip); + err = mv88e6xxx_lag_sync_masks(ds); + mv88e6xxx_reg_unlock(chip); + return err; +} + +static int mv88e6xxx_crosschip_lag_join(struct dsa_switch *ds, int sw_index, + int port, struct net_device *lag_dev) +{ + struct dsa_lag *lag = dsa_lag_by_dev(ds->dst, lag_dev); + struct mv88e6xxx_chip *chip = ds->priv; + int err; + + mv88e6xxx_reg_lock(chip); + err = mv88e6xxx_lag_sync_masks_map(ds, lag); + mv88e6xxx_reg_unlock(chip); + return err; +} + +static void mv88e6xxx_crosschip_lag_leave(struct dsa_switch *ds, int sw_index, + int port, struct net_device *lag_dev) +{ + struct dsa_lag *lag = dsa_lag_by_dev(ds->dst, lag_dev); + struct mv88e6xxx_chip *chip = ds->priv; + + mv88e6xxx_reg_lock(chip); + mv88e6xxx_lag_sync_masks_map(ds, lag); + mv88e6xxx_reg_unlock(chip); +} + static const struct dsa_switch_ops mv88e6xxx_switch_ops = { .get_tag_protocol = mv88e6xxx_get_tag_protocol, .setup = mv88e6xxx_setup, @@ -5422,6 +5636,12 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = { .devlink_param_get = mv88e6xxx_devlink_param_get, .devlink_param_set = mv88e6xxx_devlink_param_set, .devlink_info_get = mv88e6xxx_devlink_info_get, + .port_lag_change = mv88e6xxx_port_lag_change, + .port_lag_join = mv88e6xxx_port_lag_join, + .port_lag_leave = mv88e6xxx_port_lag_leave, + .crosschip_lag_change = mv88e6xxx_crosschip_lag_change, + .crosschip_lag_join = mv88e6xxx_crosschip_lag_join, + .crosschip_lag_leave = mv88e6xxx_crosschip_lag_leave, }; static int mv88e6xxx_register_switch(struct mv88e6xxx_chip *chip) @@ -5441,6 +5661,12 @@ static int mv88e6xxx_register_switch(struct mv88e6xxx_chip *chip) ds->ageing_time_min = chip->info->age_time_coeff; ds->ageing_time_max = chip->info->age_time_coeff * U8_MAX; + /* Some chips support up to 32, but that requires enabling the + * 5-bit port mode, which we do not support. 640k^W16 ought to + * be enough for anyone. + */ + ds->num_lags = 16; + dev_set_drvdata(dev, ds); return dsa_register_switch(ds); diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h index e196d7270606..fc7625593c81 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.h +++ b/drivers/net/dsa/mv88e6xxx/chip.h @@ -580,6 +580,10 @@ struct mv88e6xxx_ops { /* Max Frame Size */ int (*set_max_frame_size)(struct mv88e6xxx_chip *chip, int mtu); + + /* Link aggregation */ + int (*lag_set_map)(struct mv88e6xxx_chip *chip, struct dsa_lag *lag); + int (*lag_set_masks)(struct mv88e6xxx_chip *chip, struct dsa_lag *lag); }; struct mv88e6xxx_irq_ops { diff --git a/drivers/net/dsa/mv88e6xxx/global2.c b/drivers/net/dsa/mv88e6xxx/global2.c index 8dbb1ae723ae..fa65ecd9cb85 100644 --- a/drivers/net/dsa/mv88e6xxx/global2.c +++ b/drivers/net/dsa/mv88e6xxx/global2.c @@ -126,8 +126,8 @@ int mv88e6xxx_g2_device_mapping_write(struct mv88e6xxx_chip *chip, int target, /* Offset 0x07: Trunk Mask Table register */ -static int mv88e6xxx_g2_trunk_mask_write(struct mv88e6xxx_chip *chip, int num, - bool hash, u16 mask) +int mv88e6xxx_g2_trunk_mask_write(struct mv88e6xxx_chip *chip, int num, + bool hash, u16 mask) { u16 val = (num << 12) | (mask & mv88e6xxx_port_mask(chip)); @@ -140,8 +140,8 @@ static int mv88e6xxx_g2_trunk_mask_write(struct mv88e6xxx_chip *chip, int num, /* Offset 0x08: Trunk Mapping Table register */ -static int mv88e6xxx_g2_trunk_mapping_write(struct mv88e6xxx_chip *chip, int id, - u16 map) +int mv88e6xxx_g2_trunk_mapping_write(struct mv88e6xxx_chip *chip, int id, + u16 map) { const u16 port_mask = BIT(mv88e6xxx_num_ports(chip)) - 1; u16 val = (id << 11) | (map & port_mask); diff --git a/drivers/net/dsa/mv88e6xxx/global2.h b/drivers/net/dsa/mv88e6xxx/global2.h index 1510a1c810c8..621bbc4a1d80 100644 --- a/drivers/net/dsa/mv88e6xxx/global2.h +++ b/drivers/net/dsa/mv88e6xxx/global2.h @@ -101,6 +101,7 @@ #define MV88E6XXX_G2_PVT_ADDR_OP_WRITE_PVLAN 0x3000 #define MV88E6XXX_G2_PVT_ADDR_OP_READ 0x4000 #define MV88E6XXX_G2_PVT_ADDR_PTR_MASK 0x01ff +#define MV88E6XXX_G2_PVT_ADRR_DEV_TRUNK 0x1f /* Offset 0x0C: Cross-chip Port VLAN Data Register */ #define MV88E6XXX_G2_PVT_DATA 0x0c @@ -347,6 +348,10 @@ int mv88e6352_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip); int mv88e6xxx_g2_pot_clear(struct mv88e6xxx_chip *chip); +int mv88e6xxx_g2_trunk_mask_write(struct mv88e6xxx_chip *chip, int num, + bool hash, u16 mask); +int mv88e6xxx_g2_trunk_mapping_write(struct mv88e6xxx_chip *chip, int id, + u16 map); int mv88e6xxx_g2_trunk_clear(struct mv88e6xxx_chip *chip); int mv88e6xxx_g2_device_mapping_write(struct mv88e6xxx_chip *chip, int target, diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c index 77a5fd1798cd..4b46e10a2dde 100644 --- a/drivers/net/dsa/mv88e6xxx/port.c +++ b/drivers/net/dsa/mv88e6xxx/port.c @@ -851,6 +851,27 @@ int mv88e6xxx_port_set_message_port(struct mv88e6xxx_chip *chip, int port, return mv88e6xxx_port_write(chip, port, MV88E6XXX_PORT_CTL1, val); } +int mv88e6xxx_port_set_trunk(struct mv88e6xxx_chip *chip, int port, + bool trunk, u8 id) +{ + u16 val; + int err; + + err = mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_CTL1, &val); + if (err) + return err; + + val &= ~MV88E6XXX_PORT_CTL1_TRUNK_ID_MASK; + + if (trunk) + val |= MV88E6XXX_PORT_CTL1_TRUNK_PORT | + (id << MV88E6XXX_PORT_CTL1_TRUNK_ID_SHIFT); + else + val &= ~MV88E6XXX_PORT_CTL1_TRUNK_PORT; + + return mv88e6xxx_port_write(chip, port, MV88E6XXX_PORT_CTL1, val); +} + /* Offset 0x06: Port Based VLAN Map */ int mv88e6xxx_port_set_vlan_map(struct mv88e6xxx_chip *chip, int port, u16 map) diff --git a/drivers/net/dsa/mv88e6xxx/port.h b/drivers/net/dsa/mv88e6xxx/port.h index 500e1d4896ff..a729bba050df 100644 --- a/drivers/net/dsa/mv88e6xxx/port.h +++ b/drivers/net/dsa/mv88e6xxx/port.h @@ -168,6 +168,9 @@ /* Offset 0x05: Port Control 1 */ #define MV88E6XXX_PORT_CTL1 0x05 #define MV88E6XXX_PORT_CTL1_MESSAGE_PORT 0x8000 +#define MV88E6XXX_PORT_CTL1_TRUNK_PORT 0x4000 +#define MV88E6XXX_PORT_CTL1_TRUNK_ID_MASK 0x0f00 +#define MV88E6XXX_PORT_CTL1_TRUNK_ID_SHIFT 8 #define MV88E6XXX_PORT_CTL1_FID_11_4_MASK 0x00ff /* Offset 0x06: Port Based VLAN Map */ @@ -351,6 +354,8 @@ int mv88e6351_port_set_ether_type(struct mv88e6xxx_chip *chip, int port, u16 etype); int mv88e6xxx_port_set_message_port(struct mv88e6xxx_chip *chip, int port, bool message_port); +int mv88e6xxx_port_set_trunk(struct mv88e6xxx_chip *chip, int port, + bool trunk, u8 id); int mv88e6165_port_set_jumbo_size(struct mv88e6xxx_chip *chip, int port, size_t size); int mv88e6095_port_egress_rate_limiting(struct mv88e6xxx_chip *chip, int port);