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62 lines
2.1 KiB
Diff
62 lines
2.1 KiB
Diff
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From 5d246e343440ee4915109dac66543d02d71ca900 Mon Sep 17 00:00:00 2001
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From: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
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Date: Tue, 11 Feb 2020 15:33:46 +0800
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Subject: [PATCH] LF-457: ocelot: tsn: clean preempt interrupt status
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The INTB interrupt is used both for 1588 interrupt and preemption status
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change interrupt on each port. So clean preempt status interrupt in IRQ
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handle function. Without handling it, driver may get interrupt storm.
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Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
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Reviewed-by: Po Liu <Po.Liu@nxp.com>
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---
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drivers/net/dsa/ocelot/felix.c | 5 +----
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drivers/net/ethernet/mscc/ocelot_tsn.c | 14 ++++++++++++++
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include/soc/mscc/ocelot.h | 1 +
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3 files changed, 16 insertions(+), 4 deletions(-)
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--- a/drivers/net/dsa/ocelot/felix.c
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+++ b/drivers/net/dsa/ocelot/felix.c
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@@ -688,12 +688,9 @@ static irqreturn_t felix_irq_handler(int
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/* The INTB interrupt is used for both PTP TX timestamp interrupt
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* and preemption status change interrupt on each port.
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- *
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- * - Get txtstamp if have
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- * - TODO: handle preemption. Without handling it, driver may get
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- * interrupt storm.
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*/
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+ ocelot_preempt_irq_clean(ocelot);
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ocelot_get_txtstamp(ocelot);
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return IRQ_HANDLED;
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--- a/drivers/net/ethernet/mscc/ocelot_tsn.c
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+++ b/drivers/net/ethernet/mscc/ocelot_tsn.c
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@@ -1570,3 +1570,17 @@ int ocelot_dscp_set(struct ocelot *ocelo
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return 0;
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}
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+
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+void ocelot_preempt_irq_clean(struct ocelot *ocelot)
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+{
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+ struct ocelot_port *ocelot_port;
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+ int port;
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+ u32 val;
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+
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+ val = DEV_GMII_MM_STATISTICS_MM_STATUS_PRMPT_ACTIVE_STICKY;
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+ for (port = 0; port < ocelot->num_phys_ports; port++) {
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+ ocelot_port = ocelot->ports[port];
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+ ocelot_port_rmwl(ocelot_port, val, val,
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+ DEV_GMII_MM_STATISTICS_MM_STATUS);
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+ }
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+}
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--- a/include/soc/mscc/ocelot.h
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+++ b/include/soc/mscc/ocelot.h
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@@ -592,4 +592,5 @@ int ocelot_rtag_parse_enable(struct ocel
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int ocelot_dscp_set(struct ocelot *ocelot, int port,
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bool enable, const u8 dscp_ix,
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struct tsn_qos_switch_dscp_conf *c);
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+void ocelot_preempt_irq_clean(struct ocelot *ocelot);
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#endif
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