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kernel: 5.10: qca8k: backport qca8k_setup tidy-up

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Tidy qca8k_setup for loops relating to port handling. No functional
changes.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Matthew Hagan <mnhagan88@gmail.com>
This commit is contained in:
Matthew Hagan 2021-10-16 20:54:25 +01:00 committed by Hauke Mehrtens
parent ae77a466e4
commit b428f187f0
1 changed files with 151 additions and 0 deletions
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151
target/linux/generic/backport-5.10/799-v5.16-net-dsa-qca8k-tidy-for-loop-in-setup-and-add-cpu-port-c.patch Normal file
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@ -0,0 +1,151 @@
From 040e926f5813a5f4cc18dbff7c942d1e52f368f2 Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 19 Oct 2021 02:08:50 +0200
Subject: net: dsa: qca8k: tidy for loop in setup and add cpu port check
Tidy and organize qca8k setup function from multiple for loop.
Change for loop in bridge leave/join to scan all port and skip cpu port.
No functional change intended.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/dsa/qca8k.c | 74 +++++++++++++++++++++++++++++--------------------
1 file changed, 44 insertions(+), 30 deletions(-)
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -1122,28 +1122,34 @@ qca8k_setup(struct dsa_switch *ds)
if (ret)
dev_warn(priv->dev, "mib init failed");
- /* Enable QCA header mode on the cpu port */
- ret = qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(cpu_port),
- QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S |
- QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S);
- if (ret) {
- dev_err(priv->dev, "failed enabling QCA header mode");
- return ret;
- }
-
- /* Disable forwarding by default on all ports */
+ /* Initial setup of all ports */
for (i = 0; i < QCA8K_NUM_PORTS; i++) {
+ /* Disable forwarding by default on all ports */
ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
QCA8K_PORT_LOOKUP_MEMBER, 0);
if (ret)
return ret;
- }
- /* Disable MAC by default on all ports */
- for (i = 1; i < QCA8K_NUM_PORTS; i++)
- qca8k_port_set_status(priv, i, 0);
+ /* Enable QCA header mode on all cpu ports */
+ if (dsa_is_cpu_port(ds, i)) {
+ ret = qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(i),
+ QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S |
+ QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S);
+ if (ret) {
+ dev_err(priv->dev, "failed enabling QCA header mode");
+ return ret;
+ }
+ }
+
+ /* Disable MAC by default on all user ports */
+ if (dsa_is_user_port(ds, i))
+ qca8k_port_set_status(priv, i, 0);
+ }
- /* Forward all unknown frames to CPU port for Linux processing */
+ /* Forward all unknown frames to CPU port for Linux processing
+ * Notice that in multi-cpu config only one port should be set
+ * for igmp, unknown, multicast and broadcast packet
+ */
ret = qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1,
BIT(cpu_port) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S |
BIT(cpu_port) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S |
@@ -1152,11 +1158,13 @@ qca8k_setup(struct dsa_switch *ds)
if (ret)
return ret;
- /* Setup connection between CPU port & user ports */
+ /* Setup connection between CPU port & user ports
+ * Configure specific switch configuration for ports
+ */
for (i = 0; i < QCA8K_NUM_PORTS; i++) {
/* CPU port gets connected to all user ports of the switch */
if (dsa_is_cpu_port(ds, i)) {
- ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(cpu_port),
+ ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
QCA8K_PORT_LOOKUP_MEMBER, dsa_user_ports(ds));
if (ret)
return ret;
@@ -1193,16 +1201,14 @@ qca8k_setup(struct dsa_switch *ds)
if (ret)
return ret;
}
- }
- /* The port 5 of the qca8337 have some problem in flood condition. The
- * original legacy driver had some specific buffer and priority settings
- * for the different port suggested by the QCA switch team. Add this
- * missing settings to improve switch stability under load condition.
- * This problem is limited to qca8337 and other qca8k switch are not affected.
- */
- if (priv->switch_id == QCA8K_ID_QCA8337) {
- for (i = 0; i < QCA8K_NUM_PORTS; i++) {
+ /* The port 5 of the qca8337 have some problem in flood condition. The
+ * original legacy driver had some specific buffer and priority settings
+ * for the different port suggested by the QCA switch team. Add this
+ * missing settings to improve switch stability under load condition.
+ * This problem is limited to qca8337 and other qca8k switch are not affected.
+ */
+ if (priv->switch_id == QCA8K_ID_QCA8337) {
switch (i) {
/* The 2 CPU port and port 5 requires some different
* priority than any other ports.
@@ -1238,6 +1244,12 @@ qca8k_setup(struct dsa_switch *ds)
QCA8K_PORT_HOL_CTRL1_WRED_EN,
mask);
}
+
+ /* Set initial MTU for every port.
+ * We have only have a general MTU setting. So track
+ * every port and set the max across all port.
+ */
+ priv->port_mtu[i] = ETH_FRAME_LEN + ETH_FCS_LEN;
}
/* Special GLOBAL_FC_THRESH value are needed for ar8327 switch */
@@ -1251,8 +1263,6 @@ qca8k_setup(struct dsa_switch *ds)
}
/* Setup our port MTUs to match power on defaults */
- for (i = 0; i < QCA8K_NUM_PORTS; i++)
- priv->port_mtu[i] = ETH_FRAME_LEN + ETH_FCS_LEN;
ret = qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, ETH_FRAME_LEN + ETH_FCS_LEN);
if (ret)
dev_warn(priv->dev, "failed setting MTU settings");
@@ -1728,7 +1738,9 @@ qca8k_port_bridge_join(struct dsa_switch
cpu_port = dsa_to_port(ds, port)->cpu_dp->index;
port_mask = BIT(cpu_port);
- for (i = 1; i < QCA8K_NUM_PORTS; i++) {
+ for (i = 0; i < QCA8K_NUM_PORTS; i++) {
+ if (dsa_is_cpu_port(ds, i))
+ continue;
if (dsa_to_port(ds, i)->bridge_dev != br)
continue;
/* Add this port to the portvlan mask of the other ports
@@ -1758,7 +1770,9 @@ qca8k_port_bridge_leave(struct dsa_switc
cpu_port = dsa_to_port(ds, port)->cpu_dp->index;
- for (i = 1; i < QCA8K_NUM_PORTS; i++) {
+ for (i = 0; i < QCA8K_NUM_PORTS; i++) {
+ if (dsa_is_cpu_port(ds, i))
+ continue;
if (dsa_to_port(ds, i)->bridge_dev != br)
continue;
/* Remove this port to the portvlan mask of the other ports