diff mbox series

[net-next,v4,5/6] net: dsa: mv88e6xxx: rmon: Use RMU for reading RMON data

Message ID 20220906063450.3698671-6-mattias.forsblad@gmail.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series net: dsa: mv88e6xxx: qca8k: rmon: Add RMU support | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 10 this patch: 0
netdev/cc_maintainers success CCed 9 of 9 maintainers
netdev/build_clang success Errors and warnings before: 9 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
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: 10 this patch: 0
netdev/checkpatch warning WARNING: line length of 87 exceeds 80 columns WARNING: line length of 94 exceeds 80 columns WARNING: line length of 95 exceeds 80 columns WARNING: line length of 97 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Mattias Forsblad Sept. 6, 2022, 6:34 a.m. UTC 
Use the Remote Management Unit for efficiently accessing
the RMON data.

Signed-off-by: Mattias Forsblad <mattias.forsblad@gmail.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 39 ++++++++++++++++++++++++++------
 drivers/net/dsa/mv88e6xxx/chip.h |  2 ++
 2 files changed, 34 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index bbdf229c9e71..f32048de68fc 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1234,16 +1234,30 @@  static int mv88e6xxx_stats_get_stats(struct mv88e6xxx_chip *chip, int port,
 				     u16 bank1_select, u16 histogram)
 {
 	struct mv88e6xxx_hw_stat *stat;
+	int offset = 0;
+	u64 high;
 	int i, j;
 
 	for (i = 0, j = 0; i < ARRAY_SIZE(mv88e6xxx_hw_stats); i++) {
 		stat = &mv88e6xxx_hw_stats[i];
 		if (stat->type & types) {
-			mv88e6xxx_reg_lock(chip);
-			data[j] = _mv88e6xxx_get_ethtool_stat(chip, stat, port,
-							      bank1_select,
-							      histogram);
-			mv88e6xxx_reg_unlock(chip);
+			if (mv88e6xxx_rmu_available(chip) &&
+			    !(stat->type & STATS_TYPE_PORT)) {
+				if (stat->type & STATS_TYPE_BANK1)
+					offset = 32;
+
+				data[j] = chip->ports[port].rmu_raw_stats[stat->reg + offset];
+				if (stat->size == 8) {
+					high = chip->ports[port].rmu_raw_stats[stat->reg + offset
+							+ 1];
+					data[j] += (high << 32);
+				}
+			} else {
+				mv88e6xxx_reg_lock(chip);
+				data[j] = _mv88e6xxx_get_ethtool_stat(chip, stat, port,
+								      bank1_select, histogram);
+				mv88e6xxx_reg_unlock(chip);
+			}
 
 			j++;
 		}
@@ -1312,8 +1326,8 @@  static void mv88e6xxx_get_stats(struct mv88e6xxx_chip *chip, int port,
 	mv88e6xxx_reg_unlock(chip);
 }
 
-static void mv88e6xxx_get_ethtool_stats(struct dsa_switch *ds, int port,
-					uint64_t *data)
+static void mv88e6xxx_get_ethtool_stats_mdio(struct dsa_switch *ds, int port,
+					     uint64_t *data)
 {
 	struct mv88e6xxx_chip *chip = ds->priv;
 	int ret;
@@ -1327,7 +1341,18 @@  static void mv88e6xxx_get_ethtool_stats(struct dsa_switch *ds, int port,
 		return;
 
 	mv88e6xxx_get_stats(chip, port, data);
+}
 
+static void mv88e6xxx_get_ethtool_stats(struct dsa_switch *ds, int port,
+					uint64_t *data)
+{
+	struct mv88e6xxx_chip *chip = ds->priv;
+
+	/* If RMU isn't available fall back to MDIO access. */
+	if (mv88e6xxx_rmu_available(chip))
+		chip->rmu.ops->get_rmon(chip, port, data);
+	else
+		mv88e6xxx_get_ethtool_stats_mdio(ds, port, data);
 }
 
 static int mv88e6xxx_get_regs_len(struct dsa_switch *ds, int port)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index e81935a9573d..c7477b716473 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -266,6 +266,7 @@  struct mv88e6xxx_vlan {
 struct mv88e6xxx_port {
 	struct mv88e6xxx_chip *chip;
 	int port;
+	u64 rmu_raw_stats[64];
 	struct mv88e6xxx_vlan bridge_pvid;
 	u64 serdes_stats[2];
 	u64 atu_member_violation;
@@ -430,6 +431,7 @@  struct mv88e6xxx_bus_ops {
 	int (*read)(struct mv88e6xxx_chip *chip, int addr, int reg, u16 *val);
 	int (*write)(struct mv88e6xxx_chip *chip, int addr, int reg, u16 val);
 	int (*init)(struct mv88e6xxx_chip *chip);
+	int (*get_rmon)(struct mv88e6xxx_chip *chip, int port, uint64_t *data);
 };
 
 struct mv88e6xxx_mdio_bus {