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64 lines
2.5 KiB
Diff
64 lines
2.5 KiB
Diff
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From d176f477fd2acded12356088c0f67dee059facb5 Mon Sep 17 00:00:00 2001
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From: Vladimir Oltean <vladimir.oltean@nxp.com>
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Date: Sat, 9 Nov 2019 15:03:01 +0200
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Subject: [PATCH] net: mscc: ocelot: don't hardcode the number of the CPU port
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VSC7514 is a 10-port switch with 2 extra "CPU ports" (targets in the
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queuing subsystem for terminating traffic locally).
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There are 2 issues with hardcoding the CPU port as #10:
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- It is not clear which snippets of the code are configuring something
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for one of the CPU ports, and which snippets are just doing something
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related to the number of physical ports.
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- Actually any physical port can act as a CPU port connected to an
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external CPU (in addition to the local CPU). This is called NPI mode
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(Node Processor Interface) and is the way that the 6-port VSC9959
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(Felix) switch is integrated inside NXP LS1028A (the "local management
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CPU" functionality is not used there).
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This patch makes it clear that the ocelot_bridge_stp_state_set function
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operates on the CPU port (by making it an implicit member of the
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bridging domain), and at the same time adds logic for the NPI port (aka
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a physical port) to play the role of a CPU port (it shouldn't be part of
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bridge_fwd_mask, as it's not explicitly enslaved to a bridge).
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Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/mscc/ocelot.c | 11 +++++++----
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1 file changed, 7 insertions(+), 4 deletions(-)
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--- a/drivers/net/ethernet/mscc/ocelot.c
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+++ b/drivers/net/ethernet/mscc/ocelot.c
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@@ -1383,7 +1383,7 @@ static void ocelot_bridge_stp_state_set(
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* a source for the other ports.
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*/
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for (p = 0; p < ocelot->num_phys_ports; p++) {
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- if (ocelot->bridge_fwd_mask & BIT(p)) {
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+ if (p == ocelot->cpu || (ocelot->bridge_fwd_mask & BIT(p))) {
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unsigned long mask = ocelot->bridge_fwd_mask & ~BIT(p);
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for (i = 0; i < ocelot->num_phys_ports; i++) {
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@@ -1398,15 +1398,18 @@ static void ocelot_bridge_stp_state_set(
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}
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}
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- ocelot_write_rix(ocelot,
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- BIT(ocelot->num_phys_ports) | mask,
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+ /* Avoid the NPI port from looping back to itself */
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+ if (p != ocelot->cpu)
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+ mask |= BIT(ocelot->cpu);
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+
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+ ocelot_write_rix(ocelot, mask,
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ANA_PGID_PGID, PGID_SRC + p);
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} else {
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/* Only the CPU port, this is compatible with link
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* aggregation.
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*/
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ocelot_write_rix(ocelot,
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- BIT(ocelot->num_phys_ports),
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+ BIT(ocelot->cpu),
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ANA_PGID_PGID, PGID_SRC + p);
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}
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}
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