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Diffstat (limited to 'target/linux/generic/backport-5.10/767-v5.15-net-dsa-mt7530-use-independent-VLAN-learning-on-VLAN.patch')
-rw-r--r--target/linux/generic/backport-5.10/767-v5.15-net-dsa-mt7530-use-independent-VLAN-learning-on-VLAN.patch262
1 files changed, 0 insertions, 262 deletions
diff --git a/target/linux/generic/backport-5.10/767-v5.15-net-dsa-mt7530-use-independent-VLAN-learning-on-VLAN.patch b/target/linux/generic/backport-5.10/767-v5.15-net-dsa-mt7530-use-independent-VLAN-learning-on-VLAN.patch
deleted file mode 100644
index f9fe0ef858..0000000000
--- a/target/linux/generic/backport-5.10/767-v5.15-net-dsa-mt7530-use-independent-VLAN-learning-on-VLAN.patch
+++ /dev/null
@@ -1,262 +0,0 @@
-From e3a402764c5753698e7a9e45d4d21f093faa7852 Mon Sep 17 00:00:00 2001
-From: DENG Qingfang <dqfext@gmail.com>
-Date: Wed, 4 Aug 2021 00:04:02 +0800
-Subject: [PATCH] net: dsa: mt7530: use independent VLAN learning on
- VLAN-unaware bridges
-
-Consider the following bridge configuration, where bond0 is not
-offloaded:
-
- +-- br0 --+
- / / | \
- / / | \
- / | | bond0
- / | | / \
- swp0 swp1 swp2 swp3 swp4
- . . .
- . . .
- A B C
-
-Ideally, when the switch receives a packet from swp3 or swp4, it should
-forward the packet to the CPU, according to the port matrix and unknown
-unicast flood settings.
-
-But packet loss will happen if the destination address is at one of the
-offloaded ports (swp0~2). For example, when client C sends a packet to
-A, the FDB lookup will indicate that it should be forwarded to swp0, but
-the port matrix of swp3 and swp4 is configured to only allow the CPU to
-be its destination, so it is dropped.
-
-However, this issue does not happen if the bridge is VLAN-aware. That is
-because VLAN-aware bridges use independent VLAN learning, i.e. use VID
-for FDB lookup, on offloaded ports. As swp3 and swp4 are not offloaded,
-shared VLAN learning with default filter ID of 0 is used instead. So the
-lookup for A with filter ID 0 never hits and the packet can be forwarded
-to the CPU.
-
-In the current code, only two combinations were used to toggle user
-ports' VLAN awareness: one is PCR.PORT_VLAN set to port matrix mode with
-PVC.VLAN_ATTR set to transparent port, the other is PCR.PORT_VLAN set to
-security mode with PVC.VLAN_ATTR set to user port.
-
-It turns out that only PVC.VLAN_ATTR contributes to VLAN awareness, and
-port matrix mode just skips the VLAN table lookup. The reference manual
-is somehow misleading when describing PORT_VLAN modes. It states that
-PORT_MEM (VLAN port member) is used for destination if the VLAN table
-lookup hits, but actually **PORT_MEM & PORT_MATRIX** (bitwise AND of
-VLAN port member and port matrix) is used instead, which means we can
-have two or more separate VLAN-aware bridges with the same PVID and
-traffic won't leak between them.
-
-Therefore, to solve this, enable independent VLAN learning with PVID 0
-on VLAN-unaware bridges, by setting their PCR.PORT_VLAN to fallback
-mode, while leaving standalone ports in port matrix mode. The CPU port
-is always set to fallback mode to serve those bridges.
-
-During testing, it is found that FDB lookup with filter ID of 0 will
-also hit entries with VID 0 even with independent VLAN learning. To
-avoid that, install all VLANs with filter ID of 1.
-
-Signed-off-by: DENG Qingfang <dqfext@gmail.com>
-Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- drivers/net/dsa/mt7530.c | 72 +++++++++++++++++++++++++++++-----------
- drivers/net/dsa/mt7530.h | 9 ++++-
- 2 files changed, 60 insertions(+), 21 deletions(-)
-
---- a/drivers/net/dsa/mt7530.c
-+++ b/drivers/net/dsa/mt7530.c
-@@ -1011,6 +1011,10 @@ mt753x_cpu_port_enable(struct dsa_switch
- mt7530_write(priv, MT7530_PCR_P(port),
- PCR_MATRIX(dsa_user_ports(priv->ds)));
-
-+ /* Set to fallback mode for independent VLAN learning */
-+ mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
-+ MT7530_PORT_FALLBACK_MODE);
-+
- return 0;
- }
-
-@@ -1165,6 +1169,10 @@ mt7530_port_bridge_join(struct dsa_switc
-
- mt7530_clear(priv, MT7530_PSC_P(port), SA_DIS);
-
-+ /* Set to fallback mode for independent VLAN learning */
-+ mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
-+ MT7530_PORT_FALLBACK_MODE);
-+
- mutex_unlock(&priv->reg_mutex);
-
- return 0;
-@@ -1177,16 +1185,21 @@ mt7530_port_set_vlan_unaware(struct dsa_
- bool all_user_ports_removed = true;
- int i;
-
-- /* When a port is removed from the bridge, the port would be set up
-- * back to the default as is at initial boot which is a VLAN-unaware
-- * port.
-+ /* This is called after .port_bridge_leave when leaving a VLAN-aware
-+ * bridge. Don't set standalone ports to fallback mode.
- */
-- mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
-- MT7530_PORT_MATRIX_MODE);
-+ if (dsa_to_port(ds, port)->bridge_dev)
-+ mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
-+ MT7530_PORT_FALLBACK_MODE);
-+
- mt7530_rmw(priv, MT7530_PVC_P(port), VLAN_ATTR_MASK | PVC_EG_TAG_MASK,
- VLAN_ATTR(MT7530_VLAN_TRANSPARENT) |
- PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT));
-
-+ /* Set PVID to 0 */
-+ mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK,
-+ G0_PORT_VID_DEF);
-+
- for (i = 0; i < MT7530_NUM_PORTS; i++) {
- if (dsa_is_user_port(ds, i) &&
- dsa_port_is_vlan_filtering(dsa_to_port(ds, i))) {
-@@ -1212,15 +1225,14 @@ mt7530_port_set_vlan_aware(struct dsa_sw
- struct mt7530_priv *priv = ds->priv;
-
- /* Trapped into security mode allows packet forwarding through VLAN
-- * table lookup. CPU port is set to fallback mode to let untagged
-- * frames pass through.
-+ * table lookup.
- */
-- if (dsa_is_cpu_port(ds, port))
-- mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
-- MT7530_PORT_FALLBACK_MODE);
-- else
-+ if (dsa_is_user_port(ds, port)) {
- mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
- MT7530_PORT_SECURITY_MODE);
-+ mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK,
-+ G0_PORT_VID(priv->ports[port].pvid));
-+ }
-
- /* Set the port as a user port which is to be able to recognize VID
- * from incoming packets before fetching entry within the VLAN table.
-@@ -1264,6 +1276,13 @@ mt7530_port_bridge_leave(struct dsa_swit
-
- mt7530_set(priv, MT7530_PSC_P(port), SA_DIS);
-
-+ /* When a port is removed from the bridge, the port would be set up
-+ * back to the default as is at initial boot which is a VLAN-unaware
-+ * port.
-+ */
-+ mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
-+ MT7530_PORT_MATRIX_MODE);
-+
- mutex_unlock(&priv->reg_mutex);
- }
-
-@@ -1406,7 +1425,8 @@ mt7530_hw_vlan_add(struct mt7530_priv *p
- /* Validate the entry with independent learning, create egress tag per
- * VLAN and joining the port as one of the port members.
- */
-- val = IVL_MAC | VTAG_EN | PORT_MEM(new_members) | VLAN_VALID;
-+ val = IVL_MAC | VTAG_EN | PORT_MEM(new_members) | FID(FID_BRIDGED) |
-+ VLAN_VALID;
- mt7530_write(priv, MT7530_VAWD1, val);
-
- /* Decide whether adding tag or not for those outgoing packets from the
-@@ -1499,9 +1519,13 @@ mt7530_port_vlan_add(struct dsa_switch *
- }
-
- if (pvid) {
-- mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK,
-- G0_PORT_VID(vlan->vid_end));
- priv->ports[port].pvid = vlan->vid_end;
-+
-+ /* Only configure PVID if VLAN filtering is enabled */
-+ if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port)))
-+ mt7530_rmw(priv, MT7530_PPBV1_P(port),
-+ G0_PORT_VID_MASK,
-+ G0_PORT_VID(vlan->vid_end));
- }
-
- mutex_unlock(&priv->reg_mutex);
-@@ -1513,11 +1537,10 @@ mt7530_port_vlan_del(struct dsa_switch *
- {
- struct mt7530_hw_vlan_entry target_entry;
- struct mt7530_priv *priv = ds->priv;
-- u16 vid, pvid;
-+ u16 vid;
-
- mutex_lock(&priv->reg_mutex);
-
-- pvid = priv->ports[port].pvid;
- for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
- mt7530_hw_vlan_entry_init(&target_entry, port, 0);
- mt7530_hw_vlan_update(priv, vid, &target_entry,
-@@ -1526,12 +1549,13 @@ mt7530_port_vlan_del(struct dsa_switch *
- /* PVID is being restored to the default whenever the PVID port
- * is being removed from the VLAN.
- */
-- if (pvid == vid)
-- pvid = G0_PORT_VID_DEF;
-+ if (priv->ports[port].pvid == vid) {
-+ priv->ports[port].pvid = G0_PORT_VID_DEF;
-+ mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK,
-+ G0_PORT_VID_DEF);
-+ }
- }
-
-- mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, pvid);
-- priv->ports[port].pvid = pvid;
-
- mutex_unlock(&priv->reg_mutex);
-
-@@ -1827,6 +1851,10 @@ mt7530_setup(struct dsa_switch *ds)
- return ret;
- } else {
- mt7530_port_disable(ds, i);
-+
-+ /* Set default PVID to 0 on all user ports */
-+ mt7530_rmw(priv, MT7530_PPBV1_P(i), G0_PORT_VID_MASK,
-+ G0_PORT_VID_DEF);
- }
-
- /* Enable consistent egress tag */
-@@ -1993,6 +2021,10 @@ mt7531_setup(struct dsa_switch *ds)
- return ret;
- } else {
- mt7530_port_disable(ds, i);
-+
-+ /* Set default PVID to 0 on all user ports */
-+ mt7530_rmw(priv, MT7530_PPBV1_P(i), G0_PORT_VID_MASK,
-+ G0_PORT_VID_DEF);
- }
-
- /* Enable consistent egress tag */
---- a/drivers/net/dsa/mt7530.h
-+++ b/drivers/net/dsa/mt7530.h
-@@ -145,11 +145,18 @@ enum mt7530_vlan_cmd {
- #define VTAG_EN BIT(28)
- /* VLAN Member Control */
- #define PORT_MEM(x) (((x) & 0xff) << 16)
-+/* Filter ID */
-+#define FID(x) (((x) & 0x7) << 1)
- /* VLAN Entry Valid */
- #define VLAN_VALID BIT(0)
- #define PORT_MEM_SHFT 16
- #define PORT_MEM_MASK 0xff
-
-+enum mt7530_fid {
-+ FID_STANDALONE = 0,
-+ FID_BRIDGED = 1,
-+};
-+
- #define MT7530_VAWD2 0x98
- /* Egress Tag Control */
- #define ETAG_CTRL_P(p, x) (((x) & 0x3) << ((p) << 1))
-@@ -244,7 +251,7 @@ enum mt7530_vlan_port_attr {
- #define MT7530_PPBV1_P(x) (0x2014 + ((x) * 0x100))
- #define G0_PORT_VID(x) (((x) & 0xfff) << 0)
- #define G0_PORT_VID_MASK G0_PORT_VID(0xfff)
--#define G0_PORT_VID_DEF G0_PORT_VID(1)
-+#define G0_PORT_VID_DEF G0_PORT_VID(0)
-
- /* Register for port MAC control register */
- #define MT7530_PMCR_P(x) (0x3000 + ((x) * 0x100))
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-24 12:44:57 +0000