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authorVladimir Oltean <vladimir.oltean@nxp.com>2023-04-15 19:05:51 +0200
committerJakub Kicinski <kuba@kernel.org>2023-04-18 04:01:19 +0200
commit403ffc2c34de5297d007e0e169bf022094d444c2 (patch)
tree50c835cd0c7aaad2aedd9a49e5695f55c1e46523 /include/soc/mscc
parentnet: dsa: felix: act upon the mqprio qopt in taprio offload (diff)
downloadlinux-403ffc2c34de5297d007e0e169bf022094d444c2.tar.xz
linux-403ffc2c34de5297d007e0e169bf022094d444c2.zip
net: mscc: ocelot: add support for preemptible traffic classes
In order to not transmit (preemptible) frames which will be received by the link partner as corrupted (because it doesn't support FP), the hardware requires the driver to program the QSYS_PREEMPTION_CFG_P_QUEUES register only after the MAC Merge layer becomes active (verification succeeds, or was disabled). There are some cases when FP is known (through experimentation) to be broken. Give priority to FP over cut-through switching, and disable FP for known broken link modes. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/soc/mscc')
-rw-r--r--include/soc/mscc/ocelot.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 9596c79e9223..cb8fbb241879 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -749,6 +749,8 @@ struct ocelot_mm_state {
enum ethtool_mm_verify_status verify_status;
bool tx_enabled;
bool tx_active;
+ u8 preemptible_tcs;
+ u8 active_preemptible_tcs;
};
struct ocelot_port;
@@ -1158,6 +1160,7 @@ int ocelot_port_get_mm(struct ocelot *ocelot, int port,
struct ethtool_mm_state *state);
int ocelot_port_mqprio(struct ocelot *ocelot, int port,
struct tc_mqprio_qopt_offload *mqprio);
+void ocelot_port_update_preemptible_tcs(struct ocelot *ocelot, int port);
#if IS_ENABLED(CONFIG_BRIDGE_MRP)
int ocelot_mrp_add(struct ocelot *ocelot, int port,