diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0404-LF-457-ocelot-tsn-clean-preempt-interrupt-status.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0404-LF-457-ocelot-tsn-clean-preempt-interrupt-status.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0404-LF-457-ocelot-tsn-clean-preempt-interrupt-status.patch b/target/linux/layerscape/patches-5.4/701-net-0404-LF-457-ocelot-tsn-clean-preempt-interrupt-status.patch new file mode 100644 index 0000000000..96897b5e2a --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0404-LF-457-ocelot-tsn-clean-preempt-interrupt-status.patch @@ -0,0 +1,61 @@ +From 5d246e343440ee4915109dac66543d02d71ca900 Mon Sep 17 00:00:00 2001 +From: Xiaoliang Yang <xiaoliang.yang_1@nxp.com> +Date: Tue, 11 Feb 2020 15:33:46 +0800 +Subject: [PATCH] LF-457: ocelot: tsn: clean preempt interrupt status + +The INTB interrupt is used both for 1588 interrupt and preemption status +change interrupt on each port. So clean preempt status interrupt in IRQ +handle function. Without handling it, driver may get interrupt storm. + +Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com> +Reviewed-by: Po Liu <Po.Liu@nxp.com> +--- + drivers/net/dsa/ocelot/felix.c | 5 +---- + drivers/net/ethernet/mscc/ocelot_tsn.c | 14 ++++++++++++++ + include/soc/mscc/ocelot.h | 1 + + 3 files changed, 16 insertions(+), 4 deletions(-) + +--- a/drivers/net/dsa/ocelot/felix.c ++++ b/drivers/net/dsa/ocelot/felix.c +@@ -688,12 +688,9 @@ static irqreturn_t felix_irq_handler(int + + /* The INTB interrupt is used for both PTP TX timestamp interrupt + * and preemption status change interrupt on each port. +- * +- * - Get txtstamp if have +- * - TODO: handle preemption. Without handling it, driver may get +- * interrupt storm. + */ + ++ ocelot_preempt_irq_clean(ocelot); + ocelot_get_txtstamp(ocelot); + + return IRQ_HANDLED; +--- a/drivers/net/ethernet/mscc/ocelot_tsn.c ++++ b/drivers/net/ethernet/mscc/ocelot_tsn.c +@@ -1570,3 +1570,17 @@ int ocelot_dscp_set(struct ocelot *ocelo + + return 0; + } ++ ++void ocelot_preempt_irq_clean(struct ocelot *ocelot) ++{ ++ struct ocelot_port *ocelot_port; ++ int port; ++ u32 val; ++ ++ val = DEV_GMII_MM_STATISTICS_MM_STATUS_PRMPT_ACTIVE_STICKY; ++ for (port = 0; port < ocelot->num_phys_ports; port++) { ++ ocelot_port = ocelot->ports[port]; ++ ocelot_port_rmwl(ocelot_port, val, val, ++ DEV_GMII_MM_STATISTICS_MM_STATUS); ++ } ++} +--- a/include/soc/mscc/ocelot.h ++++ b/include/soc/mscc/ocelot.h +@@ -592,4 +592,5 @@ int ocelot_rtag_parse_enable(struct ocel + int ocelot_dscp_set(struct ocelot *ocelot, int port, + bool enable, const u8 dscp_ix, + struct tsn_qos_switch_dscp_conf *c); ++void ocelot_preempt_irq_clean(struct ocelot *ocelot); + #endif |