Merging upstream version 6.1.90.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 238 insertions, 49 deletions

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 07065c1af..1aba0cf38 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -419,6 +419,20 @@ static void mt7530_pll_setup(struct mt7530_priv *priv)
 	core_set(priv, CORE_TRGMII_GSW_CLK_CG, REG_GSWCK_EN);
 }
 
+/* If port 6 is available as a CPU port, always prefer that as the default,
+ * otherwise don't care.
+ */
+static struct dsa_port *
+mt753x_preferred_default_local_cpu_port(struct dsa_switch *ds)
+{
+	struct dsa_port *cpu_dp = dsa_to_port(ds, 6);
+
+	if (dsa_port_is_cpu(cpu_dp))
+		return cpu_dp;
+
+	return NULL;
+}
+
 /* Setup port 6 interface mode and TRGMII TX circuit */
 static int
 mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface)
@@ -998,20 +1012,173 @@ unlock_exit:
 	mutex_unlock(&priv->reg_mutex);
 }
 
-/* On page 205, section "8.6.3 Frame filtering" of the active standard, IEEE Std
- * 802.1Q™-2022, it is stated that frames with 01:80:C2:00:00:00-0F as MAC DA
- * must only be propagated to C-VLAN and MAC Bridge components. That means
- * VLAN-aware and VLAN-unaware bridges. On the switch designs with CPU ports,
- * these frames are supposed to be processed by the CPU (software). So we make
- * the switch only forward them to the CPU port. And if received from a CPU
- * port, forward to a single port. The software is responsible of making the
- * switch conform to the latter by setting a single port as destination port on
- * the special tag.
+/* In Clause 5 of IEEE Std 802-2014, two sublayers of the data link layer (DLL)
+ * of the Open Systems Interconnection basic reference model (OSI/RM) are
+ * described; the medium access control (MAC) and logical link control (LLC)
+ * sublayers. The MAC sublayer is the one facing the physical layer.
+ *
+ * In 8.2 of IEEE Std 802.1Q-2022, the Bridge architecture is described. A
+ * Bridge component comprises a MAC Relay Entity for interconnecting the Ports
+ * of the Bridge, at least two Ports, and higher layer entities with at least a
+ * Spanning Tree Protocol Entity included.
+ *
+ * Each Bridge Port also functions as an end station and shall provide the MAC
+ * Service to an LLC Entity. Each instance of the MAC Service is provided to a
+ * distinct LLC Entity that supports protocol identification, multiplexing, and
+ * demultiplexing, for protocol data unit (PDU) transmission and reception by
+ * one or more higher layer entities.
+ *
+ * It is described in 8.13.9 of IEEE Std 802.1Q-2022 that in a Bridge, the LLC
+ * Entity associated with each Bridge Port is modeled as being directly
+ * connected to the attached Local Area Network (LAN).
+ *
+ * On the switch with CPU port architecture, CPU port functions as Management
+ * Port, and the Management Port functionality is provided by software which
+ * functions as an end station. Software is connected to an IEEE 802 LAN that is
+ * wholly contained within the system that incorporates the Bridge. Software
+ * provides access to the LLC Entity associated with each Bridge Port by the
+ * value of the source port field on the special tag on the frame received by
+ * software.
+ *
+ * We call frames that carry control information to determine the active
+ * topology and current extent of each Virtual Local Area Network (VLAN), i.e.,
+ * spanning tree or Shortest Path Bridging (SPB) and Multiple VLAN Registration
+ * Protocol Data Units (MVRPDUs), and frames from other link constrained
+ * protocols, such as Extensible Authentication Protocol over LAN (EAPOL) and
+ * Link Layer Discovery Protocol (LLDP), link-local frames. They are not
+ * forwarded by a Bridge. Permanently configured entries in the filtering
+ * database (FDB) ensure that such frames are discarded by the Forwarding
+ * Process. In 8.6.3 of IEEE Std 802.1Q-2022, this is described in detail:
+ *
+ * Each of the reserved MAC addresses specified in Table 8-1
+ * (01-80-C2-00-00-[00,01,02,03,04,05,06,07,08,09,0A,0B,0C,0D,0E,0F]) shall be
+ * permanently configured in the FDB in C-VLAN components and ERs.
+ *
+ * Each of the reserved MAC addresses specified in Table 8-2
+ * (01-80-C2-00-00-[01,02,03,04,05,06,07,08,09,0A,0E]) shall be permanently
+ * configured in the FDB in S-VLAN components.
+ *
+ * Each of the reserved MAC addresses specified in Table 8-3
+ * (01-80-C2-00-00-[01,02,04,0E]) shall be permanently configured in the FDB in
+ * TPMR components.
+ *
+ * The FDB entries for reserved MAC addresses shall specify filtering for all
+ * Bridge Ports and all VIDs. Management shall not provide the capability to
+ * modify or remove entries for reserved MAC addresses.
+ *
+ * The addresses in Table 8-1, Table 8-2, and Table 8-3 determine the scope of
+ * propagation of PDUs within a Bridged Network, as follows:
+ *
+ *   The Nearest Bridge group address (01-80-C2-00-00-0E) is an address that no
+ *   conformant Two-Port MAC Relay (TPMR) component, Service VLAN (S-VLAN)
+ *   component, Customer VLAN (C-VLAN) component, or MAC Bridge can forward.
+ *   PDUs transmitted using this destination address, or any other addresses
+ *   that appear in Table 8-1, Table 8-2, and Table 8-3
+ *   (01-80-C2-00-00-[00,01,02,03,04,05,06,07,08,09,0A,0B,0C,0D,0E,0F]), can
+ *   therefore travel no further than those stations that can be reached via a
+ *   single individual LAN from the originating station.
+ *
+ *   The Nearest non-TPMR Bridge group address (01-80-C2-00-00-03), is an
+ *   address that no conformant S-VLAN component, C-VLAN component, or MAC
+ *   Bridge can forward; however, this address is relayed by a TPMR component.
+ *   PDUs using this destination address, or any of the other addresses that
+ *   appear in both Table 8-1 and Table 8-2 but not in Table 8-3
+ *   (01-80-C2-00-00-[00,03,05,06,07,08,09,0A,0B,0C,0D,0F]), will be relayed by
+ *   any TPMRs but will propagate no further than the nearest S-VLAN component,
+ *   C-VLAN component, or MAC Bridge.
+ *
+ *   The Nearest Customer Bridge group address (01-80-C2-00-00-00) is an address
+ *   that no conformant C-VLAN component, MAC Bridge can forward; however, it is
+ *   relayed by TPMR components and S-VLAN components. PDUs using this
+ *   destination address, or any of the other addresses that appear in Table 8-1
+ *   but not in either Table 8-2 or Table 8-3 (01-80-C2-00-00-[00,0B,0C,0D,0F]),
+ *   will be relayed by TPMR components and S-VLAN components but will propagate
+ *   no further than the nearest C-VLAN component or MAC Bridge.
+ *
+ * Because the LLC Entity associated with each Bridge Port is provided via CPU
+ * port, we must not filter these frames but forward them to CPU port.
+ *
+ * In a Bridge, the transmission Port is majorly decided by ingress and egress
+ * rules, FDB, and spanning tree Port State functions of the Forwarding Process.
+ * For link-local frames, only CPU port should be designated as destination port
+ * in the FDB, and the other functions of the Forwarding Process must not
+ * interfere with the decision of the transmission Port. We call this process
+ * trapping frames to CPU port.
+ *
+ * Therefore, on the switch with CPU port architecture, link-local frames must
+ * be trapped to CPU port, and certain link-local frames received by a Port of a
+ * Bridge comprising a TPMR component or an S-VLAN component must be excluded
+ * from it.
+ *
+ * A Bridge of the switch with CPU port architecture cannot comprise a Two-Port
+ * MAC Relay (TPMR) component as a TPMR component supports only a subset of the
+ * functionality of a MAC Bridge. A Bridge comprising two Ports (Management Port
+ * doesn't count) of this architecture will either function as a standard MAC
+ * Bridge or a standard VLAN Bridge.
+ *
+ * Therefore, a Bridge of this architecture can only comprise S-VLAN components,
+ * C-VLAN components, or MAC Bridge components. Since there's no TPMR component,
+ * we don't need to relay PDUs using the destination addresses specified on the
+ * Nearest non-TPMR section, and the proportion of the Nearest Customer Bridge
+ * section where they must be relayed by TPMR components.
+ *
+ * One option to trap link-local frames to CPU port is to add static FDB entries
+ * with CPU port designated as destination port. However, because that
+ * Independent VLAN Learning (IVL) is being used on every VID, each entry only
+ * applies to a single VLAN Identifier (VID). For a Bridge comprising a MAC
+ * Bridge component or a C-VLAN component, there would have to be 16 times 4096
+ * entries. This switch intellectual property can only hold a maximum of 2048
+ * entries. Using this option, there also isn't a mechanism to prevent
+ * link-local frames from being discarded when the spanning tree Port State of
+ * the reception Port is discarding.
+ *
+ * The remaining option is to utilise the BPC, RGAC1, RGAC2, RGAC3, and RGAC4
+ * registers. Whilst this applies to every VID, it doesn't contain all of the
+ * reserved MAC addresses without affecting the remaining Standard Group MAC
+ * Addresses. The REV_UN frame tag utilised using the RGAC4 register covers the
+ * remaining 01-80-C2-00-00-[04,05,06,07,08,09,0A,0B,0C,0D,0F] destination
+ * addresses. It also includes the 01-80-C2-00-00-22 to 01-80-C2-00-00-FF
+ * destination addresses which may be relayed by MAC Bridges or VLAN Bridges.
+ * The latter option provides better but not complete conformance.
  *
- * This switch intellectual property cannot conform to this part of the standard
- * fully. Whilst the REV_UN frame tag covers the remaining :04-0D and :0F MAC
- * DAs, it also includes :22-FF which the scope of propagation is not supposed
- * to be restricted for these MAC DAs.
+ * This switch intellectual property also does not provide a mechanism to trap
+ * link-local frames with specific destination addresses to CPU port by Bridge,
+ * to conform to the filtering rules for the distinct Bridge components.
+ *
+ * Therefore, regardless of the type of the Bridge component, link-local frames
+ * with these destination addresses will be trapped to CPU port:
+ *
+ * 01-80-C2-00-00-[00,01,02,03,0E]
+ *
+ * In a Bridge comprising a MAC Bridge component or a C-VLAN component:
+ *
+ *   Link-local frames with these destination addresses won't be trapped to CPU
+ *   port which won't conform to IEEE Std 802.1Q-2022:
+ *
+ *   01-80-C2-00-00-[04,05,06,07,08,09,0A,0B,0C,0D,0F]
+ *
+ * In a Bridge comprising an S-VLAN component:
+ *
+ *   Link-local frames with these destination addresses will be trapped to CPU
+ *   port which won't conform to IEEE Std 802.1Q-2022:
+ *
+ *   01-80-C2-00-00-00
+ *
+ *   Link-local frames with these destination addresses won't be trapped to CPU
+ *   port which won't conform to IEEE Std 802.1Q-2022:
+ *
+ *   01-80-C2-00-00-[04,05,06,07,08,09,0A]
+ *
+ * To trap link-local frames to CPU port as conformant as this switch
+ * intellectual property can allow, link-local frames are made to be regarded as
+ * Bridge Protocol Data Units (BPDUs). This is because this switch intellectual
+ * property only lets the frames regarded as BPDUs bypass the spanning tree Port
+ * State function of the Forwarding Process.
+ *
+ * The only remaining interference is the ingress rules. When the reception Port
+ * has no PVID assigned on software, VLAN-untagged frames won't be allowed in.
+ * There doesn't seem to be a mechanism on the switch intellectual property to
+ * have link-local frames bypass this function of the Forwarding Process.
  */
 static void
 mt753x_trap_frames(struct mt7530_priv *priv)
@@ -1019,35 +1186,43 @@ mt753x_trap_frames(struct mt7530_priv *priv)
 	/* Trap 802.1X PAE frames and BPDUs to the CPU port(s) and egress them
 	 * VLAN-untagged.
 	 */
-	mt7530_rmw(priv, MT753X_BPC, MT753X_PAE_EG_TAG_MASK |
-		   MT753X_PAE_PORT_FW_MASK | MT753X_BPDU_EG_TAG_MASK |
-		   MT753X_BPDU_PORT_FW_MASK,
-		   MT753X_PAE_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
-		   MT753X_PAE_PORT_FW(MT753X_BPDU_CPU_ONLY) |
-		   MT753X_BPDU_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
-		   MT753X_BPDU_CPU_ONLY);
+	mt7530_rmw(priv, MT753X_BPC,
+		   MT753X_PAE_BPDU_FR | MT753X_PAE_EG_TAG_MASK |
+			   MT753X_PAE_PORT_FW_MASK | MT753X_BPDU_EG_TAG_MASK |
+			   MT753X_BPDU_PORT_FW_MASK,
+		   MT753X_PAE_BPDU_FR |
+			   MT753X_PAE_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
+			   MT753X_PAE_PORT_FW(MT753X_BPDU_CPU_ONLY) |
+			   MT753X_BPDU_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
+			   MT753X_BPDU_CPU_ONLY);
 
 	/* Trap frames with :01 and :02 MAC DAs to the CPU port(s) and egress
 	 * them VLAN-untagged.
 	 */
-	mt7530_rmw(priv, MT753X_RGAC1, MT753X_R02_EG_TAG_MASK |
-		   MT753X_R02_PORT_FW_MASK | MT753X_R01_EG_TAG_MASK |
-		   MT753X_R01_PORT_FW_MASK,
-		   MT753X_R02_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
-		   MT753X_R02_PORT_FW(MT753X_BPDU_CPU_ONLY) |
-		   MT753X_R01_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
-		   MT753X_BPDU_CPU_ONLY);
+	mt7530_rmw(priv, MT753X_RGAC1,
+		   MT753X_R02_BPDU_FR | MT753X_R02_EG_TAG_MASK |
+			   MT753X_R02_PORT_FW_MASK | MT753X_R01_BPDU_FR |
+			   MT753X_R01_EG_TAG_MASK | MT753X_R01_PORT_FW_MASK,
+		   MT753X_R02_BPDU_FR |
+			   MT753X_R02_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
+			   MT753X_R02_PORT_FW(MT753X_BPDU_CPU_ONLY) |
+			   MT753X_R01_BPDU_FR |
+			   MT753X_R01_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
+			   MT753X_BPDU_CPU_ONLY);
 
 	/* Trap frames with :03 and :0E MAC DAs to the CPU port(s) and egress
 	 * them VLAN-untagged.
 	 */
-	mt7530_rmw(priv, MT753X_RGAC2, MT753X_R0E_EG_TAG_MASK |
-		   MT753X_R0E_PORT_FW_MASK | MT753X_R03_EG_TAG_MASK |
-		   MT753X_R03_PORT_FW_MASK,
-		   MT753X_R0E_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
-		   MT753X_R0E_PORT_FW(MT753X_BPDU_CPU_ONLY) |
-		   MT753X_R03_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
-		   MT753X_BPDU_CPU_ONLY);
+	mt7530_rmw(priv, MT753X_RGAC2,
+		   MT753X_R0E_BPDU_FR | MT753X_R0E_EG_TAG_MASK |
+			   MT753X_R0E_PORT_FW_MASK | MT753X_R03_BPDU_FR |
+			   MT753X_R03_EG_TAG_MASK | MT753X_R03_PORT_FW_MASK,
+		   MT753X_R0E_BPDU_FR |
+			   MT753X_R0E_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
+			   MT753X_R0E_PORT_FW(MT753X_BPDU_CPU_ONLY) |
+			   MT753X_R03_BPDU_FR |
+			   MT753X_R03_EG_TAG(MT7530_VLAN_EG_UNTAGGED) |
+			   MT753X_BPDU_CPU_ONLY);
 }
 
 static int
@@ -1075,6 +1250,13 @@ mt753x_cpu_port_enable(struct dsa_switch *ds, int port)
 	if (priv->id == ID_MT7530 || priv->id == ID_MT7621)
 		mt7530_rmw(priv, MT7530_MFC, CPU_MASK, CPU_EN | CPU_PORT(port));
 
+	/* Add the CPU port to the CPU port bitmap for MT7531. Trapped frames
+	 * will be forwarded to the CPU port that is affine to the inbound user
+	 * port.
+	 */
+	if (priv->id == ID_MT7531)
+		mt7530_set(priv, MT7531_CFC, MT7531_CPU_PMAP(BIT(port)));
+
 	/* CPU port gets connected to all user ports of
 	 * the switch.
 	 */
@@ -2252,8 +2434,6 @@ mt7530_setup(struct dsa_switch *ds)
 		     SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST |
 		     SYS_CTRL_REG_RST);
 
-	mt7530_pll_setup(priv);
-
 	/* Lower Tx driving for TRGMII path */
 	for (i = 0; i < NUM_TRGMII_CTRL; i++)
 		mt7530_write(priv, MT7530_TRGMII_TD_ODT(i),
@@ -2271,6 +2451,9 @@ mt7530_setup(struct dsa_switch *ds)
 
 	priv->p6_interface = PHY_INTERFACE_MODE_NA;
 
+	if ((val & HWTRAP_XTAL_MASK) == HWTRAP_XTAL_40MHZ)
+		mt7530_pll_setup(priv);
+
 	mt753x_trap_frames(priv);
 
 	/* Enable and reset MIB counters */
@@ -2300,6 +2483,9 @@ mt7530_setup(struct dsa_switch *ds)
 			   PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT));
 	}
 
+	/* Allow mirroring frames received on the local port (monitor port). */
+	mt7530_set(priv, MT753X_AGC, LOCAL_EN);
+
 	/* Setup VLAN ID 0 for VLAN-unaware bridges */
 	ret = mt7530_setup_vlan0(priv);
 	if (ret)
@@ -2370,16 +2556,8 @@ static int
 mt7531_setup_common(struct dsa_switch *ds)
 {
 	struct mt7530_priv *priv = ds->priv;
-	struct dsa_port *cpu_dp;
 	int ret, i;
 
-	/* BPDU to CPU port */
-	dsa_switch_for_each_cpu_port(cpu_dp, ds) {
-		mt7530_rmw(priv, MT7531_CFC, MT7531_CPU_PMAP_MASK,
-			   BIT(cpu_dp->index));
-		break;
-	}
-
 	mt753x_trap_frames(priv);
 
 	/* Enable and reset MIB counters */
@@ -2416,6 +2594,9 @@ mt7531_setup_common(struct dsa_switch *ds)
 			   PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT));
 	}
 
+	/* Allow mirroring frames received on the local port (monitor port). */
+	mt7530_set(priv, MT753X_AGC, LOCAL_EN);
+
 	/* Flush the FDB table */
 	ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL);
 	if (ret < 0)
@@ -2494,18 +2675,25 @@ mt7531_setup(struct dsa_switch *ds)
 	priv->p5_interface = PHY_INTERFACE_MODE_NA;
 	priv->p6_interface = PHY_INTERFACE_MODE_NA;
 
-	/* Enable PHY core PLL, since phy_device has not yet been created
-	 * provided for phy_[read,write]_mmd_indirect is called, we provide
-	 * our own mt7531_ind_mmd_phy_[read,write] to complete this
-	 * function.
+	/* Enable Energy-Efficient Ethernet (EEE) and PHY core PLL, since
+	 * phy_device has not yet been created provided for
+	 * phy_[read,write]_mmd_indirect is called, we provide our own
+	 * mt7531_ind_mmd_phy_[read,write] to complete this function.
 	 */
 	val = mt7531_ind_c45_phy_read(priv, MT753X_CTRL_PHY_ADDR,
 				      MDIO_MMD_VEND2, CORE_PLL_GROUP4);
-	val |= MT7531_PHY_PLL_BYPASS_MODE;
+	val |= MT7531_RG_SYSPLL_DMY2 | MT7531_PHY_PLL_BYPASS_MODE;
 	val &= ~MT7531_PHY_PLL_OFF;
 	mt7531_ind_c45_phy_write(priv, MT753X_CTRL_PHY_ADDR, MDIO_MMD_VEND2,
 				 CORE_PLL_GROUP4, val);
 
+	/* Disable EEE advertisement on the switch PHYs. */
+	for (i = MT753X_CTRL_PHY_ADDR;
+	     i < MT753X_CTRL_PHY_ADDR + MT7530_NUM_PHYS; i++) {
+		mt7531_ind_c45_phy_write(priv, i, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
+					 0);
+	}
+
 	mt7531_setup_common(ds);
 
 	/* Setup VLAN ID 0 for VLAN-unaware bridges */
@@ -3239,6 +3427,7 @@ static int mt753x_set_mac_eee(struct dsa_switch *ds, int port,
 static const struct dsa_switch_ops mt7530_switch_ops = {
 	.get_tag_protocol	= mtk_get_tag_protocol,
 	.setup			= mt753x_setup,
+	.preferred_default_local_cpu_port = mt753x_preferred_default_local_cpu_port,
 	.get_strings		= mt7530_get_strings,
 	.get_ethtool_stats	= mt7530_get_ethtool_stats,
 	.get_sset_count		= mt7530_get_sset_count,