diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/762-v5.11-net-dsa-mt7530-support-setting-MTU.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/762-v5.11-net-dsa-mt7530-support-setting-MTU.patch | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/target/linux/generic/backport-5.10/762-v5.11-net-dsa-mt7530-support-setting-MTU.patch b/target/linux/generic/backport-5.10/762-v5.11-net-dsa-mt7530-support-setting-MTU.patch deleted file mode 100644 index f1fa461aec..0000000000 --- a/target/linux/generic/backport-5.10/762-v5.11-net-dsa-mt7530-support-setting-MTU.patch +++ /dev/null @@ -1,112 +0,0 @@ -From 9470174e7581e75a8ebd78964997314dfc2e706c Mon Sep 17 00:00:00 2001 -From: DENG Qingfang <dqfext@gmail.com> -Date: Tue, 3 Nov 2020 13:06:18 +0800 -Subject: [PATCH] net: dsa: mt7530: support setting MTU - -MT7530/7531 has a global RX packet length register, which can be used -to set MTU. - -Supported packet length values are 1522 (1518 if untagged), 1536, -1552, and multiple of 1024 (from 2048 to 15360). - -Signed-off-by: DENG Qingfang <dqfext@gmail.com> -Link: https://lore.kernel.org/r/20201103050618.11419-1-dqfext@gmail.com -Signed-off-by: Jakub Kicinski <kuba@kernel.org> ---- - drivers/net/dsa/mt7530.c | 49 ++++++++++++++++++++++++++++++++++++++++ - drivers/net/dsa/mt7530.h | 12 ++++++++++ - 2 files changed, 61 insertions(+) - ---- a/drivers/net/dsa/mt7530.c -+++ b/drivers/net/dsa/mt7530.c -@@ -1018,6 +1018,53 @@ mt7530_port_disable(struct dsa_switch *d - mutex_unlock(&priv->reg_mutex); - } - -+static int -+mt7530_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu) -+{ -+ struct mt7530_priv *priv = ds->priv; -+ struct mii_bus *bus = priv->bus; -+ int length; -+ u32 val; -+ -+ /* When a new MTU is set, DSA always set the CPU port's MTU to the -+ * largest MTU of the slave ports. Because the switch only has a global -+ * RX length register, only allowing CPU port here is enough. -+ */ -+ if (!dsa_is_cpu_port(ds, port)) -+ return 0; -+ -+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); -+ -+ val = mt7530_mii_read(priv, MT7530_GMACCR); -+ val &= ~MAX_RX_PKT_LEN_MASK; -+ -+ /* RX length also includes Ethernet header, MTK tag, and FCS length */ -+ length = new_mtu + ETH_HLEN + MTK_HDR_LEN + ETH_FCS_LEN; -+ if (length <= 1522) { -+ val |= MAX_RX_PKT_LEN_1522; -+ } else if (length <= 1536) { -+ val |= MAX_RX_PKT_LEN_1536; -+ } else if (length <= 1552) { -+ val |= MAX_RX_PKT_LEN_1552; -+ } else { -+ val &= ~MAX_RX_JUMBO_MASK; -+ val |= MAX_RX_JUMBO(DIV_ROUND_UP(length, 1024)); -+ val |= MAX_RX_PKT_LEN_JUMBO; -+ } -+ -+ mt7530_mii_write(priv, MT7530_GMACCR, val); -+ -+ mutex_unlock(&bus->mdio_lock); -+ -+ return 0; -+} -+ -+static int -+mt7530_port_max_mtu(struct dsa_switch *ds, int port) -+{ -+ return MT7530_MAX_MTU; -+} -+ - static void - mt7530_stp_state_set(struct dsa_switch *ds, int port, u8 state) - { -@@ -2650,6 +2697,8 @@ static const struct dsa_switch_ops mt753 - .get_sset_count = mt7530_get_sset_count, - .port_enable = mt7530_port_enable, - .port_disable = mt7530_port_disable, -+ .port_change_mtu = mt7530_port_change_mtu, -+ .port_max_mtu = mt7530_port_max_mtu, - .port_stp_state_set = mt7530_stp_state_set, - .port_bridge_join = mt7530_port_bridge_join, - .port_bridge_leave = mt7530_port_bridge_leave, ---- a/drivers/net/dsa/mt7530.h -+++ b/drivers/net/dsa/mt7530.h -@@ -11,6 +11,9 @@ - #define MT7530_NUM_FDB_RECORDS 2048 - #define MT7530_ALL_MEMBERS 0xff - -+#define MTK_HDR_LEN 4 -+#define MT7530_MAX_MTU (15 * 1024 - ETH_HLEN - ETH_FCS_LEN - MTK_HDR_LEN) -+ - enum mt753x_id { - ID_MT7530 = 0, - ID_MT7621 = 1, -@@ -301,6 +304,15 @@ enum mt7530_vlan_port_attr { - #define MT7531_DBG_CNT(x) (0x3018 + (x) * 0x100) - #define MT7531_DIS_CLR BIT(31) - -+#define MT7530_GMACCR 0x30e0 -+#define MAX_RX_JUMBO(x) ((x) << 2) -+#define MAX_RX_JUMBO_MASK GENMASK(5, 2) -+#define MAX_RX_PKT_LEN_MASK GENMASK(1, 0) -+#define MAX_RX_PKT_LEN_1522 0x0 -+#define MAX_RX_PKT_LEN_1536 0x1 -+#define MAX_RX_PKT_LEN_1552 0x2 -+#define MAX_RX_PKT_LEN_JUMBO 0x3 -+ - /* Register for MIB */ - #define MT7530_PORT_MIB_COUNTER(x) (0x4000 + (x) * 0x100) - #define MT7530_MIB_CCR 0x4fe0 |