[RFC Patch net-next 1/2] net: dsa: microchip: enable port queues for tc mqprio
From: Arun Ramadoss
Date: Wed Nov 09 2022 - 11:08:41 EST
LAN937x family of switches has 8 queues per port where all the ksz
switches has 4 queues per port. By default, only one queue per port is
enabled. The queues are configurable in 2, 4 or 8. This patch add 8
number of queues for LAN937x and 4 for other switches.
In the tag_ksz.c file, prioirty of the packet is queried using the skb
buffer and the corresponding value is updated in the tag.
Signed-off-by: Arun Ramadoss <arun.ramadoss@xxxxxxxxxxxxx>
---
drivers/net/dsa/microchip/ksz9477.c | 4 ++++
drivers/net/dsa/microchip/ksz9477_reg.h | 5 ++++-
drivers/net/dsa/microchip/ksz_common.c | 17 +++++++++++++++++
drivers/net/dsa/microchip/ksz_common.h | 1 +
drivers/net/dsa/microchip/lan937x_main.c | 4 ++++
drivers/net/dsa/microchip/lan937x_reg.h | 6 +++++-
net/dsa/tag_ksz.c | 15 +++++++++++++++
7 files changed, 50 insertions(+), 2 deletions(-)
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 0d6b40968657..65e69a26e8ec 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1000,6 +1000,10 @@ void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port)
ksz_port_cfg(dev, port, REG_PORT_CTRL_0, PORT_TAIL_TAG_ENABLE,
true);
+ /* Enable the Port Queue split */
+ ksz_prmw8(dev, port, REG_PORT_CTRL_0, PORT_QUEUE_SPLIT_MASK,
+ PORT_FOUR_QUEUE);
+
ksz_port_cfg(dev, port, REG_PORT_CTRL_0, PORT_MAC_LOOPBACK, false);
/* set back pressure */
diff --git a/drivers/net/dsa/microchip/ksz9477_reg.h b/drivers/net/dsa/microchip/ksz9477_reg.h
index 53c68d286dd3..3f08b1bd7ff3 100644
--- a/drivers/net/dsa/microchip/ksz9477_reg.h
+++ b/drivers/net/dsa/microchip/ksz9477_reg.h
@@ -850,7 +850,10 @@
#define PORT_FORCE_TX_FLOW_CTRL BIT(4)
#define PORT_FORCE_RX_FLOW_CTRL BIT(3)
#define PORT_TAIL_TAG_ENABLE BIT(2)
-#define PORT_QUEUE_SPLIT_ENABLE 0x3
+#define PORT_QUEUE_SPLIT_MASK GENMASK(1, 0)
+#define PORT_FOUR_QUEUE 0x2
+#define PORT_TWO_QUEUE 0x1
+#define PORT_SINGLE_QUEUE 0x0
#define REG_PORT_CTRL_1 0x0021
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 8c8db315317d..63e567554548 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -1040,6 +1040,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x07, /* can be configured as cpu port */
.port_cnt = 3, /* total port count */
.port_nirqs = 3,
+ .num_tx_queues = 4,
.ops = &ksz9477_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1066,6 +1067,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 8,
.cpu_ports = 0x10, /* can be configured as cpu port */
.port_cnt = 5, /* total cpu and user ports */
+ .num_tx_queues = 4,
.ops = &ksz8_dev_ops,
.ksz87xx_eee_link_erratum = true,
.mib_names = ksz9477_mib_names,
@@ -1104,6 +1106,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 8,
.cpu_ports = 0x10, /* can be configured as cpu port */
.port_cnt = 5, /* total cpu and user ports */
+ .num_tx_queues = 4,
.ops = &ksz8_dev_ops,
.ksz87xx_eee_link_erratum = true,
.mib_names = ksz9477_mib_names,
@@ -1128,6 +1131,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 8,
.cpu_ports = 0x10, /* can be configured as cpu port */
.port_cnt = 5, /* total cpu and user ports */
+ .num_tx_queues = 4,
.ops = &ksz8_dev_ops,
.ksz87xx_eee_link_erratum = true,
.mib_names = ksz9477_mib_names,
@@ -1152,6 +1156,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 8,
.cpu_ports = 0x4, /* can be configured as cpu port */
.port_cnt = 3,
+ .num_tx_queues = 4,
.ops = &ksz8_dev_ops,
.mib_names = ksz88xx_mib_names,
.mib_cnt = ARRAY_SIZE(ksz88xx_mib_names),
@@ -1173,6 +1178,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x7F, /* can be configured as cpu port */
.port_cnt = 7, /* total physical port count */
.port_nirqs = 4,
+ .num_tx_queues = 4,
.ops = &ksz9477_dev_ops,
.phy_errata_9477 = true,
.mib_names = ksz9477_mib_names,
@@ -1205,6 +1211,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x3F, /* can be configured as cpu port */
.port_cnt = 6, /* total physical port count */
.port_nirqs = 2,
+ .num_tx_queues = 4,
.ops = &ksz9477_dev_ops,
.phy_errata_9477 = true,
.mib_names = ksz9477_mib_names,
@@ -1237,6 +1244,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x7F, /* can be configured as cpu port */
.port_cnt = 7, /* total physical port count */
.port_nirqs = 2,
+ .num_tx_queues = 4,
.ops = &ksz9477_dev_ops,
.phy_errata_9477 = true,
.mib_names = ksz9477_mib_names,
@@ -1267,6 +1275,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x07, /* can be configured as cpu port */
.port_cnt = 3, /* total port count */
.port_nirqs = 2,
+ .num_tx_queues = 4,
.ops = &ksz9477_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1317,6 +1326,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x7F, /* can be configured as cpu port */
.port_cnt = 7, /* total physical port count */
.port_nirqs = 3,
+ .num_tx_queues = 4,
.ops = &ksz9477_dev_ops,
.phy_errata_9477 = true,
.mib_names = ksz9477_mib_names,
@@ -1347,6 +1357,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x10, /* can be configured as cpu port */
.port_cnt = 5, /* total physical port count */
.port_nirqs = 6,
+ .num_tx_queues = 8,
.ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1371,6 +1382,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x30, /* can be configured as cpu port */
.port_cnt = 6, /* total physical port count */
.port_nirqs = 6,
+ .num_tx_queues = 8,
.ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1395,6 +1407,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x30, /* can be configured as cpu port */
.port_cnt = 8, /* total physical port count */
.port_nirqs = 6,
+ .num_tx_queues = 8,
.ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1423,6 +1436,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x38, /* can be configured as cpu port */
.port_cnt = 5, /* total physical port count */
.port_nirqs = 6,
+ .num_tx_queues = 8,
.ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1451,6 +1465,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.cpu_ports = 0x30, /* can be configured as cpu port */
.port_cnt = 8, /* total physical port count */
.port_nirqs = 6,
+ .num_tx_queues = 8,
.ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1983,6 +1998,8 @@ static int ksz_setup(struct dsa_switch *ds)
dev->dev_ops->enable_stp_addr(dev);
+ ds->num_tx_queues = dev->info->num_tx_queues;
+
regmap_update_bits(dev->regmap[0], regs[S_MULTICAST_CTRL],
MULTICAST_STORM_DISABLE, MULTICAST_STORM_DISABLE);
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index c6726cbd5465..60706b10cd46 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -46,6 +46,7 @@ struct ksz_chip_data {
int cpu_ports;
int port_cnt;
u8 port_nirqs;
+ u8 num_tx_queues;
const struct ksz_dev_ops *ops;
bool phy_errata_9477;
bool ksz87xx_eee_link_erratum;
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index 06d3d0308cba..ffb83225eb95 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -180,6 +180,10 @@ void lan937x_port_setup(struct ksz_device *dev, int port, bool cpu_port)
lan937x_port_cfg(dev, port, REG_PORT_CTRL_0,
PORT_TAIL_TAG_ENABLE, true);
+ /* Enable the Port Queue split */
+ ksz_prmw8(dev, port, REG_PORT_CTRL_0, PORT_QUEUE_SPLIT_MASK,
+ PORT_EIGHT_QUEUE);
+
/* set back pressure for half duplex */
lan937x_port_cfg(dev, port, REG_PORT_MAC_CTRL_1, PORT_BACK_PRESSURE,
true);
diff --git a/drivers/net/dsa/microchip/lan937x_reg.h b/drivers/net/dsa/microchip/lan937x_reg.h
index 5bc16a4c4441..f64e9de6976c 100644
--- a/drivers/net/dsa/microchip/lan937x_reg.h
+++ b/drivers/net/dsa/microchip/lan937x_reg.h
@@ -143,7 +143,11 @@
#define PORT_K2L_INSERT_ENABLE BIT(5)
#define PORT_K2L_DEBUG_ENABLE BIT(4)
#define PORT_TAIL_TAG_ENABLE BIT(2)
-#define PORT_QUEUE_SPLIT_ENABLE 0x3
+#define PORT_QUEUE_SPLIT_MASK GENMASK(1, 0)
+#define PORT_EIGHT_QUEUE 0x3
+#define PORT_FOUR_QUEUE 0x2
+#define PORT_TWO_QUEUE 0x1
+#define PORT_SINGLE_QUEUE 0x0
/* 1 - Phy */
#define REG_PORT_T1_PHY_CTRL_BASE 0x0100
diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c
index 38fa19c1e2d5..8fe6ea1d623d 100644
--- a/net/dsa/tag_ksz.c
+++ b/net/dsa/tag_ksz.c
@@ -106,10 +106,13 @@ MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ8795);
#define KSZ9477_TAIL_TAG_OVERRIDE BIT(9)
#define KSZ9477_TAIL_TAG_LOOKUP BIT(10)
+#define KSZ9477_TAIL_TAG_PRIO 7
static struct sk_buff *ksz9477_xmit(struct sk_buff *skb,
struct net_device *dev)
{
+ u16 queue_mapping = skb_get_queue_mapping(skb);
+ u8 prio = netdev_txq_to_tc(dev, queue_mapping);
struct dsa_port *dp = dsa_slave_to_port(dev);
__be16 *tag;
u8 *addr;
@@ -124,6 +127,8 @@ static struct sk_buff *ksz9477_xmit(struct sk_buff *skb,
val = BIT(dp->index);
+ val |= (prio << KSZ9477_TAIL_TAG_PRIO);
+
if (is_link_local_ether_addr(addr))
val |= KSZ9477_TAIL_TAG_OVERRIDE;
@@ -159,10 +164,13 @@ MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ9477);
#define KSZ9893_TAIL_TAG_OVERRIDE BIT(5)
#define KSZ9893_TAIL_TAG_LOOKUP BIT(6)
+#define KSZ9893_TAIL_TAG_PRIO 3
static struct sk_buff *ksz9893_xmit(struct sk_buff *skb,
struct net_device *dev)
{
+ u16 queue_mapping = skb_get_queue_mapping(skb);
+ u8 prio = netdev_txq_to_tc(dev, queue_mapping);
struct dsa_port *dp = dsa_slave_to_port(dev);
u8 *addr;
u8 *tag;
@@ -176,6 +184,8 @@ static struct sk_buff *ksz9893_xmit(struct sk_buff *skb,
*tag = BIT(dp->index);
+ *tag |= (prio << KSZ9893_TAIL_TAG_PRIO);
+
if (is_link_local_ether_addr(addr))
*tag |= KSZ9893_TAIL_TAG_OVERRIDE;
@@ -212,11 +222,14 @@ MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ9893);
#define LAN937X_TAIL_TAG_BLOCKING_OVERRIDE BIT(11)
#define LAN937X_TAIL_TAG_LOOKUP BIT(12)
#define LAN937X_TAIL_TAG_VALID BIT(13)
+#define LAN937X_TAIL_TAG_PRIO 8
#define LAN937X_TAIL_TAG_PORT_MASK 7
static struct sk_buff *lan937x_xmit(struct sk_buff *skb,
struct net_device *dev)
{
+ u16 queue_mapping = skb_get_queue_mapping(skb);
+ u8 prio = netdev_txq_to_tc(dev, queue_mapping);
struct dsa_port *dp = dsa_slave_to_port(dev);
const struct ethhdr *hdr = eth_hdr(skb);
__be16 *tag;
@@ -229,6 +242,8 @@ static struct sk_buff *lan937x_xmit(struct sk_buff *skb,
val = BIT(dp->index);
+ val |= (prio << LAN937X_TAIL_TAG_PRIO);
+
if (is_link_local_ether_addr(hdr->h_dest))
val |= LAN937X_TAIL_TAG_BLOCKING_OVERRIDE;
--
2.36.1