diff mbox series

[v4,net-next,6/8] net: dsa: mv88e6xxx: Limit histogram counters to ingress traffic

Message ID 20231214135029.383595-7-tobias@waldekranz.com (mailing list archive)
State Accepted
Commit ceea48efa35839ed3ddebb7fe9c00308fbf6d9cd
Delegated to: Netdev Maintainers
Headers show
Series net: dsa: mv88e6xxx: Add "eth-mac" and "rmon" counter group support | expand

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Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1115 this patch: 1115
netdev/cc_maintainers warning 2 maintainers not CCed: pabeni@redhat.com edumazet@google.com
netdev/build_clang success Errors and warnings before: 1142 this patch: 1142
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1142 this patch: 1142
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 49 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Tobias Waldekranz Dec. 14, 2023, 1:50 p.m. UTC 
Chips in this family only have one set of histogram counters, which
can be used to count ingressing and/or egressing traffic. mv88e6xxx
has, up until this point, kept the hardware default of counting both
directions.

In the mean time, standard counter group support has been added to
ethtool. Via that interface, drivers may report ingress-only and
egress-only histograms separately - but not combined.

In order for mv88e6xxx to maximize amount of diagnostic information
that can be exported via standard interfaces, we opt to limit the
histogram counters to ingress traffic only. Which will allow us to
export them via the standard "rmon" group in an upcoming commit.

The reason for choosing ingress-only over egress-only, is to be
compatible with RFC2819 (RMON MIB).

Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c    | 6 +++---
 drivers/net/dsa/mv88e6xxx/global1.c | 7 +++----
 2 files changed, 6 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 627ed0d8be94..9e365364a34a 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1221,7 +1221,7 @@  static size_t mv88e6095_stats_get_stat(struct mv88e6xxx_chip *chip, int port,
 		return 0;
 
 	*data = _mv88e6xxx_get_ethtool_stat(chip, stat, port, 0,
-					    MV88E6XXX_G1_STATS_OP_HIST_RX_TX);
+					    MV88E6XXX_G1_STATS_OP_HIST_RX);
 	return 1;
 }
 
@@ -1233,7 +1233,7 @@  static size_t mv88e6250_stats_get_stat(struct mv88e6xxx_chip *chip, int port,
 		return 0;
 
 	*data = _mv88e6xxx_get_ethtool_stat(chip, stat, port, 0,
-					    MV88E6XXX_G1_STATS_OP_HIST_RX_TX);
+					    MV88E6XXX_G1_STATS_OP_HIST_RX);
 	return 1;
 }
 
@@ -1246,7 +1246,7 @@  static size_t mv88e6320_stats_get_stat(struct mv88e6xxx_chip *chip, int port,
 
 	*data = _mv88e6xxx_get_ethtool_stat(chip, stat, port,
 					    MV88E6XXX_G1_STATS_OP_BANK_1_BIT_9,
-					    MV88E6XXX_G1_STATS_OP_HIST_RX_TX);
+					    MV88E6XXX_G1_STATS_OP_HIST_RX);
 	return 1;
 }
 
diff --git a/drivers/net/dsa/mv88e6xxx/global1.c b/drivers/net/dsa/mv88e6xxx/global1.c
index 174c773b38c2..49444a72ff09 100644
--- a/drivers/net/dsa/mv88e6xxx/global1.c
+++ b/drivers/net/dsa/mv88e6xxx/global1.c
@@ -462,8 +462,7 @@  int mv88e6390_g1_rmu_disable(struct mv88e6xxx_chip *chip)
 int mv88e6390_g1_stats_set_histogram(struct mv88e6xxx_chip *chip)
 {
 	return mv88e6xxx_g1_ctl2_mask(chip, MV88E6390_G1_CTL2_HIST_MODE_MASK,
-				      MV88E6390_G1_CTL2_HIST_MODE_RX |
-				      MV88E6390_G1_CTL2_HIST_MODE_TX);
+				      MV88E6390_G1_CTL2_HIST_MODE_RX);
 }
 
 int mv88e6xxx_g1_set_device_number(struct mv88e6xxx_chip *chip, int index)
@@ -491,7 +490,7 @@  int mv88e6095_g1_stats_set_histogram(struct mv88e6xxx_chip *chip)
 	if (err)
 		return err;
 
-	val |= MV88E6XXX_G1_STATS_OP_HIST_RX_TX;
+	val |= MV88E6XXX_G1_STATS_OP_HIST_RX;
 
 	err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP, val);
 
@@ -506,7 +505,7 @@  int mv88e6xxx_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port)
 	err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP,
 				 MV88E6XXX_G1_STATS_OP_BUSY |
 				 MV88E6XXX_G1_STATS_OP_CAPTURE_PORT |
-				 MV88E6XXX_G1_STATS_OP_HIST_RX_TX | port);
+				 MV88E6XXX_G1_STATS_OP_HIST_RX | port);
 	if (err)
 		return err;