diff mbox series

[net-next,v2,8/9] net: dsa: microchip: init predictable IPV to queue mapping for all non KSZ8xxx variants

Message ID 20240403092905.2107522-9-o.rempel@pengutronix.de (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Enhanced DCB and DSCP Support for KSZ Switches | expand

Checks

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: 943 this patch: 943
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 9 of 9 maintainers
netdev/build_clang success Errors and warnings before: 954 this patch: 954
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: 954 this patch: 954
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 93 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

Oleksij Rempel April 3, 2024, 9:29 a.m. UTC
Init priority to queue mapping in the way as it shown in IEEE 802.1Q
mapping example.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
changes v2:
- s/ksz_set_default_prio_queue_mapping/ksz9477_set_default_prio_queue_mapping
- remove error on queue < 0.
---
 drivers/net/dsa/microchip/ksz_common.c | 57 +++++++++++++++-----------
 1 file changed, 33 insertions(+), 24 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 08426f85f7707..3dec90cfaf5de 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -24,6 +24,7 @@ 
 #include <linux/of_net.h>
 #include <linux/micrel_phy.h>
 #include <net/dsa.h>
+#include <net/ieee8021q.h>
 #include <net/pkt_cls.h>
 #include <net/switchdev.h>
 
@@ -2692,9 +2693,33 @@  static int ksz_port_mdb_del(struct dsa_switch *ds, int port,
 	return dev->dev_ops->mdb_del(dev, port, mdb, db);
 }
 
+static int ksz9477_set_default_prio_queue_mapping(struct ksz_device *dev,
+						  int port)
+{
+	u32 queue_map = 0;
+	int ipv;
+
+	for (ipv = 0; ipv < dev->info->max_ipvs; ipv++) {
+		int queue;
+
+		/* Traffic Type (TT) is corresponding to the Internal Priority
+		 * Value (IPV) in the switch. Traffic Class (TC) is
+		 * corresponding to the queue in the switch.
+		 */
+		queue = ieee8021q_tt_to_tc(ipv, dev->info->num_tx_queues);
+		if (queue < 0)
+			return queue;
+
+		queue_map |= queue << (ipv * KSZ9477_PORT_TC_MAP_S);
+	}
+
+	return ksz_pwrite32(dev, port, KSZ9477_PORT_MRI_TC_MAP__4, queue_map);
+}
+
 static int ksz_port_setup(struct dsa_switch *ds, int port)
 {
 	struct ksz_device *dev = ds->priv;
+	int ret;
 
 	if (!dsa_is_user_port(ds, port))
 		return 0;
@@ -2702,6 +2727,12 @@  static int ksz_port_setup(struct dsa_switch *ds, int port)
 	/* setup user port */
 	dev->dev_ops->port_setup(dev, port, false);
 
+	if (!is_ksz8(dev)) {
+		ret = ksz9477_set_default_prio_queue_mapping(dev, port);
+		if (ret)
+			return ret;
+	}
+
 	/* port_stp_state_set() will be called after to enable the port so
 	 * there is no need to do anything.
 	 */
@@ -3566,8 +3597,7 @@  static int ksz_tc_ets_add(struct ksz_device *dev, int port,
 
 static int ksz_tc_ets_del(struct ksz_device *dev, int port)
 {
-	int ret, queue, tc_prio, s;
-	u32 queue_map = 0;
+	int ret, queue;
 
 	/* To restore the default chip configuration, set all queues to use the
 	 * WRR scheduler with a weight of 1.
@@ -3579,31 +3609,10 @@  static int ksz_tc_ets_del(struct ksz_device *dev, int port)
 			return ret;
 	}
 
-	switch (dev->info->num_tx_queues) {
-	case 2:
-		s = 2;
-		break;
-	case 4:
-		s = 1;
-		break;
-	case 8:
-		s = 0;
-		break;
-	default:
-		return -EINVAL;
-	}
-
 	/* Revert the queue mapping for TC-priority to its default setting on
 	 * the chip.
 	 */
-	for (tc_prio = 0; tc_prio < dev->info->max_ipvs; tc_prio++) {
-		int queue;
-
-		queue = tc_prio >> s;
-		queue_map |= queue << (tc_prio * KSZ9477_PORT_TC_MAP_S);
-	}
-
-	return ksz_pwrite32(dev, port, KSZ9477_PORT_MRI_TC_MAP__4, queue_map);
+	return ksz9477_set_default_prio_queue_mapping(dev, port);
 }
 
 static int ksz_tc_ets_validate(struct ksz_device *dev, int port,