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Backport lots upstream changes, many of them fixes, for the mt7530 DSA driver. Some of them may or may not find they way into Linux 6.1 stable, some certainly won't because they are fixes for backported commits which aren't even present in Linux 6.1 upstream. Apart from adding new patches, also remove mutated patch 723-net-mt7531-ensure-all-MACs-are-powered-down-before-r.patch which should never have been added for Linux 6.1 -- it was applied already upstream but coincidentally would fuzzy-apply in the wrong place as well (for MT7530 instead of MT7531). While that didn't really hurt anyone it is just unneeded. The other deleted patch 795-mt7530-register-OF-node-for-internal-MDIO-bus.patch has been replaced by an equivalent commit with a more complete patch description by upstream maintainer Arınç Ünal. The remaining differences compared to the upstream driver are: * C22/C45 MDIO ops aren't split Upstream did that, backporting it would require making changes to *all* DSA drivers * 'slave' -> 'user', 'master' -> 'conduit' language change in DSA * support for selecting preferred CPU port on MT7531 Also this would require too many DSA framework changes potentially affecting other devices. If we ever really use Linux 6.1 in a release (I hope not) we can still reconsider to make the effort to backport that. In addition to some minor bug fixes and style improvements the switch should now behave more conformant when it comes to link-local frames, and we will again be able to cleanly pick patches from upstream. MAINTAIERS NOTE: Three patches are already part of Linux stable and should be removed with the next minor kernel version bump: 789-STABLE-01-net-dsa-mt7530-prevent-possible-incorrect-XTAL-frequ.patch 789-STABLE-02-net-dsa-mt7530-fix-link-local-frames-that-ingress-vl.patch 789-STABLE-03-net-dsa-mt7530-fix-handling-of-all-link-local-frames.patch Signed-off-by: Daniel Golle <daniel@makrotopia.org>
126 lines
4.4 KiB
Diff
126 lines
4.4 KiB
Diff
From a385398f77fad9eabe7cdc253e1a356484acc316 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= <arinc.unal@arinc9.com>
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Date: Mon, 22 Jan 2024 08:35:52 +0300
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Subject: [PATCH 23/48] net: dsa: mt7530: always trap frames to active CPU port
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on MT7530
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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On the MT7530 switch, the CPU_PORT field indicates which CPU port to trap
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frames to, regardless of the affinity of the inbound user port.
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When multiple CPU ports are in use, if the DSA conduit interface is down,
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trapped frames won't be passed to the conduit interface.
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To make trapping frames work including this case, implement
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ds->ops->conduit_state_change() on this subdriver and set the CPU_PORT
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field to the numerically smallest CPU port whose conduit interface is up.
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Introduce the active_cpu_ports field to store the information of the active
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CPU ports. Correct the macros, CPU_PORT is bits 4 through 6 of the
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register.
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Add a comment to explain frame trapping for this switch.
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Currently, the driver doesn't support the use of multiple CPU ports so this
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is not necessarily a bug fix.
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Suggested-by: Vladimir Oltean <olteanv@gmail.com>
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Suggested-by: Russell King (Oracle) <linux@armlinux.org.uk>
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Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
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Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
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Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-1-042401f2b279@arinc9.com
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/dsa/mt7530.c | 35 +++++++++++++++++++++++++++++++----
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drivers/net/dsa/mt7530.h | 6 ++++--
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2 files changed, 35 insertions(+), 6 deletions(-)
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--- a/drivers/net/dsa/mt7530.c
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+++ b/drivers/net/dsa/mt7530.c
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@@ -1064,10 +1064,6 @@ mt753x_cpu_port_enable(struct dsa_switch
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mt7530_set(priv, MT7530_MFC, BC_FFP(BIT(port)) | UNM_FFP(BIT(port)) |
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UNU_FFP(BIT(port)));
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- /* Set CPU port number */
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- if (priv->id == ID_MT7530 || priv->id == ID_MT7621)
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- mt7530_rmw(priv, MT7530_MFC, CPU_MASK, CPU_EN | CPU_PORT(port));
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-
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/* Add the CPU port to the CPU port bitmap for MT7531 and the switch on
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* the MT7988 SoC. Trapped frames will be forwarded to the CPU port that
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* is affine to the inbound user port.
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@@ -3125,6 +3121,36 @@ static int mt753x_set_mac_eee(struct dsa
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return 0;
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}
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+static void
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+mt753x_conduit_state_change(struct dsa_switch *ds,
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+ const struct net_device *conduit,
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+ bool operational)
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+{
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+ struct dsa_port *cpu_dp = conduit->dsa_ptr;
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+ struct mt7530_priv *priv = ds->priv;
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+ int val = 0;
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+ u8 mask;
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+
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+ /* Set the CPU port to trap frames to for MT7530. Trapped frames will be
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+ * forwarded to the numerically smallest CPU port whose conduit
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+ * interface is up.
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+ */
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+ if (priv->id != ID_MT7530 && priv->id != ID_MT7621)
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+ return;
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+
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+ mask = BIT(cpu_dp->index);
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+
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+ if (operational)
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+ priv->active_cpu_ports |= mask;
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+ else
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+ priv->active_cpu_ports &= ~mask;
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+
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+ if (priv->active_cpu_ports)
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+ val = CPU_EN | CPU_PORT(__ffs(priv->active_cpu_ports));
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+
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+ mt7530_rmw(priv, MT7530_MFC, CPU_EN | CPU_PORT_MASK, val);
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+}
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+
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static int mt7988_pad_setup(struct dsa_switch *ds, phy_interface_t interface)
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{
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return 0;
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@@ -3179,6 +3205,7 @@ const struct dsa_switch_ops mt7530_switc
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.phylink_mac_link_up = mt753x_phylink_mac_link_up,
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.get_mac_eee = mt753x_get_mac_eee,
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.set_mac_eee = mt753x_set_mac_eee,
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+ .master_state_change = mt753x_conduit_state_change,
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};
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EXPORT_SYMBOL_GPL(mt7530_switch_ops);
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--- a/drivers/net/dsa/mt7530.h
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+++ b/drivers/net/dsa/mt7530.h
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@@ -41,8 +41,8 @@ enum mt753x_id {
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#define UNU_FFP(x) (((x) & 0xff) << 8)
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#define UNU_FFP_MASK UNU_FFP(~0)
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#define CPU_EN BIT(7)
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-#define CPU_PORT(x) ((x) << 4)
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-#define CPU_MASK (0xf << 4)
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+#define CPU_PORT_MASK GENMASK(6, 4)
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+#define CPU_PORT(x) FIELD_PREP(CPU_PORT_MASK, x)
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#define MIRROR_EN BIT(3)
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#define MIRROR_PORT(x) ((x) & 0x7)
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#define MIRROR_MASK 0x7
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@@ -773,6 +773,7 @@ struct mt753x_info {
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* @irq_domain: IRQ domain of the switch irq_chip
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* @irq_enable: IRQ enable bits, synced to SYS_INT_EN
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* @create_sgmii: Pointer to function creating SGMII PCS instance(s)
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+ * @active_cpu_ports: Holding the active CPU ports
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*/
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struct mt7530_priv {
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struct device *dev;
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@@ -799,6 +800,7 @@ struct mt7530_priv {
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struct irq_domain *irq_domain;
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u32 irq_enable;
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int (*create_sgmii)(struct mt7530_priv *priv, bool dual_sgmii);
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+ u8 active_cpu_ports;
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};
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struct mt7530_hw_vlan_entry {
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