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linux/drivers/net/dsa/microchip/ksz9477.c
Bastien Curutchet (Schneider Electric) af472a40b2 net: dsa: microchip: implement port_teardown only if needed 
The port_teardown() operation is optional. Yet, it is implemented by all
the KSZ switches through a common function that doesn't do anything for
the switches that aren't part of the ksz9477 family

Remove the implementation from the switches that don't need it.
Implement instead a ksz9477-specific port_teardown.

Signed-off-by: Bastien Curutchet (Schneider Electric) <bastien.curutchet@bootlin.com>
Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-10-6e61b7be23c4@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-06-12 18:08:08 -07:00

2128 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Microchip KSZ9477 switch driver main logic
*
* Copyright (C) 2017-2025 Microchip Technology Inc.
*/
#include <linux/dsa/ksz_common.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/iopoll.h>
#include <linux/platform_data/microchip-ksz.h>
#include <linux/phy.h>
#include <linux/if_bridge.h>
#include <linux/if_hsr.h>
#include <linux/if_vlan.h>
#include <net/dsa.h>
#include <net/switchdev.h>
#include "ksz9477_reg.h"
#include "ksz_common.h"
#include "ksz_dcb.h"
#include "ksz9477.h"
static void ksz_cfg(struct ksz_device *dev, u32 addr, u8 bits, bool set)
{
regmap_update_bits(ksz_regmap_8(dev), addr, bits, set ? bits : 0);
}
static void ksz_port_cfg(struct ksz_device *dev, int port, int offset, u8 bits,
bool set)
{
regmap_update_bits(ksz_regmap_8(dev), PORT_CTRL_ADDR(port, offset),
bits, set ? bits : 0);
}
static void ksz9477_cfg32(struct ksz_device *dev, u32 addr, u32 bits, bool set)
{
regmap_update_bits(ksz_regmap_32(dev), addr, bits, set ? bits : 0);
}
static void ksz9477_port_cfg32(struct ksz_device *dev, int port, int offset,
u32 bits, bool set)
{
regmap_update_bits(ksz_regmap_32(dev), PORT_CTRL_ADDR(port, offset),
bits, set ? bits : 0);
}
static int ksz9477_change_mtu(struct dsa_switch *ds, int port, int mtu)
{
struct ksz_device *dev = ds->priv;
u16 frame_size;
if (!dsa_is_cpu_port(dev->ds, port))
return 0;
frame_size = mtu + VLAN_ETH_HLEN + ETH_FCS_LEN;
return regmap_update_bits(ksz_regmap_16(dev), REG_SW_MTU__2,
REG_SW_MTU_MASK, frame_size);
}
static int ksz9477_wait_vlan_ctrl_ready(struct ksz_device *dev)
{
unsigned int val;
return regmap_read_poll_timeout(ksz_regmap_8(dev), REG_SW_VLAN_CTRL,
val, !(val & VLAN_START), 10, 1000);
}
static int ksz9477_get_vlan_table(struct ksz_device *dev, u16 vid,
u32 *vlan_table)
{
int ret;
mutex_lock(&dev->vlan_mutex);
ksz_write16(dev, REG_SW_VLAN_ENTRY_INDEX__2, vid & VLAN_INDEX_M);
ksz_write8(dev, REG_SW_VLAN_CTRL, VLAN_READ | VLAN_START);
/* wait to be cleared */
ret = ksz9477_wait_vlan_ctrl_ready(dev);
if (ret) {
dev_dbg(dev->dev, "Failed to read vlan table\n");
goto exit;
}
ksz_read32(dev, REG_SW_VLAN_ENTRY__4, &vlan_table[0]);
ksz_read32(dev, REG_SW_VLAN_ENTRY_UNTAG__4, &vlan_table[1]);
ksz_read32(dev, REG_SW_VLAN_ENTRY_PORTS__4, &vlan_table[2]);
ksz_write8(dev, REG_SW_VLAN_CTRL, 0);
exit:
mutex_unlock(&dev->vlan_mutex);
return ret;
}
static int ksz9477_set_vlan_table(struct ksz_device *dev, u16 vid,
u32 *vlan_table)
{
int ret;
mutex_lock(&dev->vlan_mutex);
ksz_write32(dev, REG_SW_VLAN_ENTRY__4, vlan_table[0]);
ksz_write32(dev, REG_SW_VLAN_ENTRY_UNTAG__4, vlan_table[1]);
ksz_write32(dev, REG_SW_VLAN_ENTRY_PORTS__4, vlan_table[2]);
ksz_write16(dev, REG_SW_VLAN_ENTRY_INDEX__2, vid & VLAN_INDEX_M);
ksz_write8(dev, REG_SW_VLAN_CTRL, VLAN_START | VLAN_WRITE);
/* wait to be cleared */
ret = ksz9477_wait_vlan_ctrl_ready(dev);
if (ret) {
dev_dbg(dev->dev, "Failed to write vlan table\n");
goto exit;
}
ksz_write8(dev, REG_SW_VLAN_CTRL, 0);
/* update vlan cache table */
dev->vlan_cache[vid].table[0] = vlan_table[0];
dev->vlan_cache[vid].table[1] = vlan_table[1];
dev->vlan_cache[vid].table[2] = vlan_table[2];
exit:
mutex_unlock(&dev->vlan_mutex);
return ret;
}
static void ksz9477_read_table(struct ksz_device *dev, u32 *table)
{
ksz_read32(dev, REG_SW_ALU_VAL_A, &table[0]);
ksz_read32(dev, REG_SW_ALU_VAL_B, &table[1]);
ksz_read32(dev, REG_SW_ALU_VAL_C, &table[2]);
ksz_read32(dev, REG_SW_ALU_VAL_D, &table[3]);
}
static void ksz9477_write_table(struct ksz_device *dev, u32 *table)
{
ksz_write32(dev, REG_SW_ALU_VAL_A, table[0]);
ksz_write32(dev, REG_SW_ALU_VAL_B, table[1]);
ksz_write32(dev, REG_SW_ALU_VAL_C, table[2]);
ksz_write32(dev, REG_SW_ALU_VAL_D, table[3]);
}
static int ksz9477_wait_alu_ready(struct ksz_device *dev)
{
unsigned int val;
return regmap_read_poll_timeout(ksz_regmap_32(dev), REG_SW_ALU_CTRL__4,
val, !(val & ALU_START), 10, 1000);
}
static int ksz9477_wait_alu_sta_ready(struct ksz_device *dev)
{
unsigned int val;
return regmap_read_poll_timeout(ksz_regmap_32(dev),
REG_SW_ALU_STAT_CTRL__4,
val, !(val & ALU_STAT_START),
10, 1000);
}
static void port_sgmii_s(struct ksz_device *dev, uint port, u16 devid, u16 reg)
{
u32 data;
data = (devid & MII_MMD_CTRL_DEVAD_MASK) << 16;
data |= reg;
ksz_pwrite32(dev, port, REG_PORT_SGMII_ADDR__4, data);
}
static void port_sgmii_r(struct ksz_device *dev, uint port, u16 devid, u16 reg,
u16 *buf)
{
port_sgmii_s(dev, port, devid, reg);
ksz_pread16(dev, port, REG_PORT_SGMII_DATA__4 + 2, buf);
}
static void port_sgmii_w(struct ksz_device *dev, uint port, u16 devid, u16 reg,
u16 buf)
{
port_sgmii_s(dev, port, devid, reg);
ksz_pwrite32(dev, port, REG_PORT_SGMII_DATA__4, buf);
}
static int ksz9477_pcs_read(struct mii_bus *bus, int phy, int mmd, int reg)
{
struct ksz_device *dev = bus->priv;
int port = ksz_get_sgmii_port(dev);
u16 val;
port_sgmii_r(dev, port, mmd, reg, &val);
/* Simulate a value to activate special code in the XPCS driver if
* supported.
*/
if (mmd == MDIO_MMD_PMAPMD) {
if (reg == MDIO_DEVID1)
val = 0x9477;
else if (reg == MDIO_DEVID2)
val = 0x22 << 10;
} else if (mmd == MDIO_MMD_VEND2) {
struct ksz_port *p = &dev->ports[port];
/* Need to update MII_BMCR register with the exact speed and
* duplex mode when running in SGMII mode and this register is
* used to detect connected speed in that mode.
*/
if (reg == MMD_SR_MII_AUTO_NEG_STATUS) {
int duplex, speed;
if (val & SR_MII_STAT_LINK_UP) {
speed = (val >> SR_MII_STAT_S) & SR_MII_STAT_M;
if (speed == SR_MII_STAT_1000_MBPS)
speed = SPEED_1000;
else if (speed == SR_MII_STAT_100_MBPS)
speed = SPEED_100;
else
speed = SPEED_10;
if (val & SR_MII_STAT_FULL_DUPLEX)
duplex = DUPLEX_FULL;
else
duplex = DUPLEX_HALF;
if (!p->link || p->speed != speed ||
p->duplex != duplex) {
u16 ctrl;
p->link = true;
p->speed = speed;
p->duplex = duplex;
port_sgmii_r(dev, port, mmd, MII_BMCR,
&ctrl);
ctrl &= BMCR_ANENABLE;
ctrl |= mii_bmcr_encode_fixed(speed,
duplex);
port_sgmii_w(dev, port, mmd, MII_BMCR,
ctrl);
}
} else {
p->link = false;
}
} else if (reg == MII_BMSR) {
p->link = !!(val & BMSR_LSTATUS);
}
}
return val;
}
static int ksz9477_pcs_write(struct mii_bus *bus, int phy, int mmd, int reg,
u16 val)
{
struct ksz_device *dev = bus->priv;
int port = ksz_get_sgmii_port(dev);
if (mmd == MDIO_MMD_VEND2) {
struct ksz_port *p = &dev->ports[port];
if (reg == MMD_SR_MII_AUTO_NEG_CTRL) {
u16 sgmii_mode = SR_MII_PCS_SGMII << SR_MII_PCS_MODE_S;
/* Need these bits for 1000BASE-X mode to work with
* AN on.
*/
if (!(val & sgmii_mode))
val |= SR_MII_SGMII_LINK_UP |
SR_MII_TX_CFG_PHY_MASTER;
/* SGMII interrupt in the port cannot be masked, so
* make sure interrupt is not enabled as it is not
* handled.
*/
val &= ~SR_MII_AUTO_NEG_COMPLETE_INTR;
} else if (reg == MII_BMCR) {
/* The MII_ADVERTISE register needs to write once
* before doing auto-negotiation for the correct
* config_word to be sent out after reset.
*/
if ((val & BMCR_ANENABLE) && !p->sgmii_adv_write) {
u16 adv;
/* The SGMII port cannot disable flow control
* so it is better to just advertise symmetric
* pause.
*/
port_sgmii_r(dev, port, mmd, MII_ADVERTISE,
&adv);
adv |= ADVERTISE_1000XPAUSE;
adv &= ~ADVERTISE_1000XPSE_ASYM;
port_sgmii_w(dev, port, mmd, MII_ADVERTISE,
adv);
p->sgmii_adv_write = 1;
} else if (val & BMCR_RESET) {
p->sgmii_adv_write = 0;
}
} else if (reg == MII_ADVERTISE) {
/* XPCS driver writes to this register so there is no
* need to update it for the errata.
*/
p->sgmii_adv_write = 1;
}
}
port_sgmii_w(dev, port, mmd, reg, val);
return 0;
}
static int ksz9477_pcs_create(struct ksz_device *dev)
{
int port = ksz_get_sgmii_port(dev);
struct ksz_port *p = &dev->ports[port];
struct phylink_pcs *pcs;
struct mii_bus *bus;
int ret;
bus = devm_mdiobus_alloc(dev->dev);
if (!bus)
return -ENOMEM;
bus->name = "ksz_pcs_mdio_bus";
snprintf(bus->id, MII_BUS_ID_SIZE, "%s-pcs",
dev_name(dev->dev));
bus->read_c45 = &ksz9477_pcs_read;
bus->write_c45 = &ksz9477_pcs_write;
bus->parent = dev->dev;
bus->phy_mask = ~0;
bus->priv = dev;
ret = devm_mdiobus_register(dev->dev, bus);
if (ret)
return ret;
pcs = xpcs_create_pcs_mdiodev(bus, 0);
if (IS_ERR(pcs))
return PTR_ERR(pcs);
p->pcs = pcs;
return 0;
}
static int ksz9477_reset_switch(struct ksz_device *dev)
{
u8 data8;
u32 data32;
/* reset switch */
ksz_cfg(dev, REG_SW_OPERATION, SW_RESET, true);
/* turn off SPI DO Edge select */
regmap_update_bits(ksz_regmap_8(dev), REG_SW_GLOBAL_SERIAL_CTRL_0,
SPI_AUTO_EDGE_DETECTION, 0);
/* default configuration */
ksz_write8(dev, REG_SW_LUE_CTRL_1,
SW_AGING_ENABLE | SW_LINK_AUTO_AGING | SW_SRC_ADDR_FILTER);
/* disable interrupts */
ksz_write32(dev, REG_SW_INT_MASK__4, SWITCH_INT_MASK);
ksz_write32(dev, REG_SW_PORT_INT_MASK__4, 0x7F);
ksz_read32(dev, REG_SW_PORT_INT_STATUS__4, &data32);
/* KSZ9893 compatible chips do not support refclk configuration */
if (dev->chip_id == KSZ9893_CHIP_ID ||
dev->chip_id == KSZ8563_CHIP_ID ||
dev->chip_id == KSZ9563_CHIP_ID)
return 0;
data8 = SW_ENABLE_REFCLKO;
if (dev->synclko_disable)
data8 = 0;
else if (dev->synclko_125)
data8 = SW_ENABLE_REFCLKO | SW_REFCLKO_IS_125MHZ;
ksz_write8(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1, data8);
return 0;
}
void ksz9477_r_mib_cnt(struct ksz_device *dev, int port, u16 addr, u64 *cnt)
{
struct ksz_port *p = &dev->ports[port];
unsigned int val;
u32 data;
int ret;
/* retain the flush/freeze bit */
data = p->freeze ? MIB_COUNTER_FLUSH_FREEZE : 0;
data |= MIB_COUNTER_READ;
data |= (addr << MIB_COUNTER_INDEX_S);
ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, data);
ret = regmap_read_poll_timeout(ksz_regmap_32(dev),
PORT_CTRL_ADDR(port, REG_PORT_MIB_CTRL_STAT__4),
val, !(val & MIB_COUNTER_READ), 10, 1000);
/* failed to read MIB. get out of loop */
if (ret) {
dev_dbg(dev->dev, "Failed to get MIB\n");
return;
}
/* count resets upon read */
ksz_pread32(dev, port, REG_PORT_MIB_DATA, &data);
*cnt += data;
}
void ksz9477_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
u64 *dropped, u64 *cnt)
{
addr = dev->info->mib_names[addr].index;
ksz9477_r_mib_cnt(dev, port, addr, cnt);
}
void ksz9477_freeze_mib(struct ksz_device *dev, int port, bool freeze)
{
u32 val = freeze ? MIB_COUNTER_FLUSH_FREEZE : 0;
struct ksz_port *p = &dev->ports[port];
/* enable/disable the port for flush/freeze function */
mutex_lock(&p->mib.cnt_mutex);
ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, val);
/* used by MIB counter reading code to know freeze is enabled */
p->freeze = freeze;
mutex_unlock(&p->mib.cnt_mutex);
}
static int ksz9477_half_duplex_monitor(struct ksz_device *dev, int port,
u64 tx_late_col)
{
u8 lue_ctrl;
u32 pmavbc;
u16 pqm;
int ret;
/* Errata DS80000754 recommends monitoring potential faults in
* half-duplex mode. The switch might not be able to communicate anymore
* in these states. If you see this message, please read the
* errata-sheet for more information:
* https://ww1.microchip.com/downloads/aemDocuments/documents/UNG/ProductDocuments/Errata/KSZ9477S-Errata-DS80000754.pdf
* To workaround this issue, half-duplex mode should be avoided.
* A software reset could be implemented to recover from this state.
*/
dev_warn_once(dev->dev,
"Half-duplex detected on port %d, transmission halt may occur\n",
port);
if (tx_late_col != 0) {
/* Transmission halt with late collisions */
dev_crit_once(dev->dev,
"TX late collisions detected, transmission may be halted on port %d\n",
port);
}
ret = ksz_read8(dev, REG_SW_LUE_CTRL_0, &lue_ctrl);
if (ret)
return ret;
if (lue_ctrl & SW_VLAN_ENABLE) {
ret = ksz_pread16(dev, port, REG_PORT_QM_TX_CNT_0__4, &pqm);
if (ret)
return ret;
ret = ksz_read32(dev, REG_PMAVBC, &pmavbc);
if (ret)
return ret;
if ((FIELD_GET(PMAVBC_MASK, pmavbc) <= PMAVBC_MIN) ||
(FIELD_GET(PORT_QM_TX_CNT_M, pqm) >= PORT_QM_TX_CNT_MAX)) {
/* Transmission halt with Half-Duplex and VLAN */
dev_crit_once(dev->dev,
"resources out of limits, transmission may be halted\n");
}
}
return ret;
}
int ksz9477_errata_monitor(struct ksz_device *dev, int port,
u64 tx_late_col)
{
u8 status;
int ret;
ret = ksz_pread8(dev, port, REG_PORT_STATUS_0, &status);
if (ret)
return ret;
if (!(FIELD_GET(PORT_INTF_SPEED_MASK, status)
== PORT_INTF_SPEED_NONE) &&
!(status & PORT_INTF_FULL_DUPLEX)) {
ret = ksz9477_half_duplex_monitor(dev, port, tx_late_col);
}
return ret;
}
void ksz9477_port_init_cnt(struct ksz_device *dev, int port)
{
struct ksz_port_mib *mib = &dev->ports[port].mib;
/* flush all enabled port MIB counters */
mutex_lock(&mib->cnt_mutex);
ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4,
MIB_COUNTER_FLUSH_FREEZE);
ksz_write8(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FLUSH);
ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, 0);
mutex_unlock(&mib->cnt_mutex);
}
static void ksz9477_r_phy_quirks(struct ksz_device *dev, u16 addr, u16 reg,
u16 *data)
{
/* KSZ8563R do not have extended registers but BMSR_ESTATEN and
* BMSR_ERCAP bits are set.
*/
if (dev->chip_id == KSZ8563_CHIP_ID && reg == MII_BMSR)
*data &= ~(BMSR_ESTATEN | BMSR_ERCAP);
}
static int ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
{
u16 val = 0xffff;
int ret;
/* No real PHY after this. Simulate the PHY.
* A fixed PHY can be setup in the device tree, but this function is
* still called for that port during initialization.
* For RGMII PHY there is no way to access it so the fixed PHY should
* be used.
*/
if (!dev->info->internal_phy[addr]) {
struct ksz_port *p = &dev->ports[addr];
switch (reg) {
case MII_BMCR:
val = 0x1140;
break;
case MII_BMSR:
val = 0x796d;
break;
case MII_PHYSID1:
val = 0x0022;
break;
case MII_PHYSID2:
val = 0x1631;
break;
case MII_ADVERTISE:
val = 0x05e1;
break;
case MII_LPA:
val = 0xc5e1;
break;
case MII_CTRL1000:
val = 0x0700;
break;
case MII_STAT1000:
if (p->speed == SPEED_1000)
val = 0x3800;
else
val = 0;
break;
}
} else {
ret = ksz_pread16(dev, addr, 0x100 + (reg << 1), &val);
if (ret)
return ret;
ksz9477_r_phy_quirks(dev, addr, reg, &val);
}
*data = val;
return 0;
}
static int ksz9477_phy_read16(struct dsa_switch *ds, int addr, int reg)
{
struct ksz_device *dev = ds->priv;
u16 val = 0xffff;
int ret;
ret = ksz9477_r_phy(dev, addr, reg, &val);
if (ret)
return ret;
return val;
}
static int ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
{
u32 mask, val32;
/* No real PHY after this. */
if (!dev->info->internal_phy[addr])
return 0;
if (reg < 0x10)
return ksz_pwrite16(dev, addr, 0x100 + (reg << 1), val);
/* Errata: When using SPI, I2C, or in-band register access,
* writes to certain PHY registers should be performed as
* 32-bit writes instead of 16-bit writes.
*/
val32 = val;
mask = 0xffff;
if ((reg & 1) == 0) {
val32 <<= 16;
mask <<= 16;
}
reg &= ~1;
return ksz_prmw32(dev, addr, 0x100 + (reg << 1), mask, val32);
}
static int ksz9477_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val)
{
struct ksz_device *dev = ds->priv;
int ret;
ret = ksz9477_w_phy(dev, addr, reg, val);
if (ret)
return ret;
return 0;
}
void ksz9477_cfg_port_member(struct ksz_device *dev, int port, u8 member)
{
ksz_pwrite32(dev, port, REG_PORT_VLAN_MEMBERSHIP__4, member);
}
void ksz9477_flush_dyn_mac_table(struct dsa_switch *ds, int port)
{
struct ksz_device *dev = ds->priv;
const u16 *regs = dev->info->regs;
u8 data;
regmap_update_bits(ksz_regmap_8(dev), REG_SW_LUE_CTRL_2,
SW_FLUSH_OPTION_M << SW_FLUSH_OPTION_S,
SW_FLUSH_OPTION_DYN_MAC << SW_FLUSH_OPTION_S);
if (port < dev->info->port_cnt) {
/* flush individual port */
ksz_pread8(dev, port, regs[P_STP_CTRL], &data);
if (!(data & PORT_LEARN_DISABLE))
ksz_pwrite8(dev, port, regs[P_STP_CTRL],
data | PORT_LEARN_DISABLE);
ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_DYN_MAC_TABLE, true);
ksz_pwrite8(dev, port, regs[P_STP_CTRL], data);
} else {
/* flush all */
ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_STP_TABLE, true);
}
}
int ksz9477_port_vlan_filtering(struct dsa_switch *ds, int port,
bool flag, struct netlink_ext_ack *extack)
{
struct ksz_device *dev = ds->priv;
if (flag) {
ksz_port_cfg(dev, port, REG_PORT_LUE_CTRL,
PORT_VLAN_LOOKUP_VID_0, true);
ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_VLAN_ENABLE, true);
} else {
ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_VLAN_ENABLE, false);
ksz_port_cfg(dev, port, REG_PORT_LUE_CTRL,
PORT_VLAN_LOOKUP_VID_0, false);
}
return 0;
}
int ksz9477_port_vlan_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan,
struct netlink_ext_ack *extack)
{
bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
struct ksz_device *dev = ds->priv;
u32 vlan_table[3];
int err;
err = ksz9477_get_vlan_table(dev, vlan->vid, vlan_table);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to get vlan table");
return err;
}
vlan_table[0] = VLAN_VALID | (vlan->vid & VLAN_FID_M);
if (untagged)
vlan_table[1] |= BIT(port);
else
vlan_table[1] &= ~BIT(port);
vlan_table[1] &= ~(BIT(dev->cpu_port));
vlan_table[2] |= BIT(port) | BIT(dev->cpu_port);
err = ksz9477_set_vlan_table(dev, vlan->vid, vlan_table);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to set vlan table");
return err;
}
/* change PVID */
if (vlan->flags & BRIDGE_VLAN_INFO_PVID)
ksz_pwrite16(dev, port, REG_PORT_DEFAULT_VID, vlan->vid);
return 0;
}
int ksz9477_port_vlan_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
struct ksz_device *dev = ds->priv;
u32 vlan_table[3];
u16 pvid;
ksz_pread16(dev, port, REG_PORT_DEFAULT_VID, &pvid);
pvid = pvid & 0xFFF;
if (ksz9477_get_vlan_table(dev, vlan->vid, vlan_table)) {
dev_dbg(dev->dev, "Failed to get vlan table\n");
return -ETIMEDOUT;
}
vlan_table[2] &= ~BIT(port);
if (pvid == vlan->vid)
pvid = 1;
if (untagged)
vlan_table[1] &= ~BIT(port);
if (ksz9477_set_vlan_table(dev, vlan->vid, vlan_table)) {
dev_dbg(dev->dev, "Failed to set vlan table\n");
return -ETIMEDOUT;
}
ksz_pwrite16(dev, port, REG_PORT_DEFAULT_VID, pvid);
return 0;
}
int ksz9477_fdb_add(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid, struct dsa_db db)
{
struct ksz_device *dev = ds->priv;
u32 alu_table[4];
u32 data;
int ret = 0;
mutex_lock(&dev->alu_mutex);
/* find any entry with mac & vid */
data = vid << ALU_FID_INDEX_S;
data |= ((addr[0] << 8) | addr[1]);
ksz_write32(dev, REG_SW_ALU_INDEX_0, data);
data = ((addr[2] << 24) | (addr[3] << 16));
data |= ((addr[4] << 8) | addr[5]);
ksz_write32(dev, REG_SW_ALU_INDEX_1, data);
/* start read operation */
ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_READ | ALU_START);
/* wait to be finished */
ret = ksz9477_wait_alu_ready(dev);
if (ret) {
dev_dbg(dev->dev, "Failed to read ALU\n");
goto exit;
}
/* read ALU entry */
ksz9477_read_table(dev, alu_table);
/* update ALU entry */
alu_table[0] = ALU_V_STATIC_VALID;
alu_table[1] |= BIT(port);
if (vid)
alu_table[1] |= ALU_V_USE_FID;
alu_table[2] = (vid << ALU_V_FID_S);
alu_table[2] |= ((addr[0] << 8) | addr[1]);
alu_table[3] = ((addr[2] << 24) | (addr[3] << 16));
alu_table[3] |= ((addr[4] << 8) | addr[5]);
ksz9477_write_table(dev, alu_table);
ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_WRITE | ALU_START);
/* wait to be finished */
ret = ksz9477_wait_alu_ready(dev);
if (ret)
dev_dbg(dev->dev, "Failed to write ALU\n");
exit:
mutex_unlock(&dev->alu_mutex);
return ret;
}
int ksz9477_fdb_del(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid, struct dsa_db db)
{
struct ksz_device *dev = ds->priv;
u32 alu_table[4];
u32 data;
int ret = 0;
mutex_lock(&dev->alu_mutex);
/* read any entry with mac & vid */
data = vid << ALU_FID_INDEX_S;
data |= ((addr[0] << 8) | addr[1]);
ksz_write32(dev, REG_SW_ALU_INDEX_0, data);
data = ((addr[2] << 24) | (addr[3] << 16));
data |= ((addr[4] << 8) | addr[5]);
ksz_write32(dev, REG_SW_ALU_INDEX_1, data);
/* start read operation */
ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_READ | ALU_START);
/* wait to be finished */
ret = ksz9477_wait_alu_ready(dev);
if (ret) {
dev_dbg(dev->dev, "Failed to read ALU\n");
goto exit;
}
ksz_read32(dev, REG_SW_ALU_VAL_A, &alu_table[0]);
if (alu_table[0] & ALU_V_STATIC_VALID) {
ksz_read32(dev, REG_SW_ALU_VAL_B, &alu_table[1]);
ksz_read32(dev, REG_SW_ALU_VAL_C, &alu_table[2]);
ksz_read32(dev, REG_SW_ALU_VAL_D, &alu_table[3]);
/* clear forwarding port */
alu_table[1] &= ~BIT(port);
/* if there is no port to forward, clear table */
if ((alu_table[1] & ALU_V_PORT_MAP) == 0) {
alu_table[0] = 0;
alu_table[1] = 0;
alu_table[2] = 0;
alu_table[3] = 0;
}
} else {
alu_table[0] = 0;
alu_table[1] = 0;
alu_table[2] = 0;
alu_table[3] = 0;
}
ksz9477_write_table(dev, alu_table);
ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_WRITE | ALU_START);
/* wait to be finished */
ret = ksz9477_wait_alu_ready(dev);
if (ret)
dev_dbg(dev->dev, "Failed to write ALU\n");
exit:
mutex_unlock(&dev->alu_mutex);
return ret;
}
static void ksz9477_convert_alu(struct alu_struct *alu, u32 *alu_table)
{
alu->is_static = !!(alu_table[0] & ALU_V_STATIC_VALID);
alu->is_src_filter = !!(alu_table[0] & ALU_V_SRC_FILTER);
alu->is_dst_filter = !!(alu_table[0] & ALU_V_DST_FILTER);
alu->prio_age = (alu_table[0] >> ALU_V_PRIO_AGE_CNT_S) &
ALU_V_PRIO_AGE_CNT_M;
alu->mstp = alu_table[0] & ALU_V_MSTP_M;
alu->is_override = !!(alu_table[1] & ALU_V_OVERRIDE);
alu->is_use_fid = !!(alu_table[1] & ALU_V_USE_FID);
alu->port_forward = alu_table[1] & ALU_V_PORT_MAP;
alu->fid = (alu_table[2] >> ALU_V_FID_S) & ALU_V_FID_M;
alu->mac[0] = (alu_table[2] >> 8) & 0xFF;
alu->mac[1] = alu_table[2] & 0xFF;
alu->mac[2] = (alu_table[3] >> 24) & 0xFF;
alu->mac[3] = (alu_table[3] >> 16) & 0xFF;
alu->mac[4] = (alu_table[3] >> 8) & 0xFF;
alu->mac[5] = alu_table[3] & 0xFF;
}
int ksz9477_fdb_dump(struct dsa_switch *ds, int port,
dsa_fdb_dump_cb_t *cb, void *data)
{
struct ksz_device *dev = ds->priv;
struct alu_struct alu;
u32 alu_table[4];
u32 ksz_data;
int ret = 0;
int timeout;
mutex_lock(&dev->alu_mutex);
/* start ALU search */
ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_START | ALU_SEARCH);
do {
timeout = 1000;
do {
ksz_read32(dev, REG_SW_ALU_CTRL__4, &ksz_data);
if ((ksz_data & ALU_VALID) || !(ksz_data & ALU_START))
break;
usleep_range(1, 10);
} while (timeout-- > 0);
if (!timeout) {
dev_dbg(dev->dev, "Failed to search ALU\n");
ret = -ETIMEDOUT;
goto exit;
}
if (!(ksz_data & ALU_VALID))
continue;
/* read ALU table */
ksz9477_read_table(dev, alu_table);
ksz9477_convert_alu(&alu, alu_table);
if (alu.port_forward & BIT(port)) {
ret = cb(alu.mac, alu.fid, alu.is_static, data);
if (ret)
goto exit;
}
} while (ksz_data & ALU_START);
exit:
/* stop ALU search */
ksz_write32(dev, REG_SW_ALU_CTRL__4, 0);
mutex_unlock(&dev->alu_mutex);
return ret;
}
int ksz9477_mdb_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb, struct dsa_db db)
{
struct ksz_device *dev = ds->priv;
u32 static_table[4];
const u8 *shifts;
const u32 *masks;
u32 data;
int index;
u32 mac_hi, mac_lo;
int err = 0;
shifts = dev->info->shifts;
masks = dev->info->masks;
mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);
mutex_lock(&dev->alu_mutex);
for (index = 0; index < dev->info->num_statics; index++) {
/* find empty slot first */
data = (index << shifts[ALU_STAT_INDEX]) |
masks[ALU_STAT_READ] | ALU_STAT_START;
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
/* wait to be finished */
err = ksz9477_wait_alu_sta_ready(dev);
if (err) {
dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
goto exit;
}
/* read ALU static table */
ksz9477_read_table(dev, static_table);
if (static_table[0] & ALU_V_STATIC_VALID) {
/* check this has same vid & mac address */
if (((static_table[2] >> ALU_V_FID_S) == mdb->vid) &&
((static_table[2] & ALU_V_MAC_ADDR_HI) == mac_hi) &&
static_table[3] == mac_lo) {
/* found matching one */
break;
}
} else {
/* found empty one */
break;
}
}
/* no available entry */
if (index == dev->info->num_statics) {
err = -ENOSPC;
goto exit;
}
/* add entry */
static_table[0] = ALU_V_STATIC_VALID;
static_table[1] |= BIT(port);
if (mdb->vid)
static_table[1] |= ALU_V_USE_FID;
static_table[2] = (mdb->vid << ALU_V_FID_S);
static_table[2] |= mac_hi;
static_table[3] = mac_lo;
ksz9477_write_table(dev, static_table);
data = (index << shifts[ALU_STAT_INDEX]) | ALU_STAT_START;
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
/* wait to be finished */
if (ksz9477_wait_alu_sta_ready(dev))
dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
exit:
mutex_unlock(&dev->alu_mutex);
return err;
}
int ksz9477_mdb_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb, struct dsa_db db)
{
struct ksz_device *dev = ds->priv;
u32 static_table[4];
u32 mac_hi, mac_lo;
const u8 *shifts;
const u32 *masks;
int ret = 0;
int index;
u32 data;
shifts = dev->info->shifts;
masks = dev->info->masks;
mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);
mutex_lock(&dev->alu_mutex);
for (index = 0; index < dev->info->num_statics; index++) {
/* find empty slot first */
data = (index << shifts[ALU_STAT_INDEX]) |
masks[ALU_STAT_READ] | ALU_STAT_START;
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
/* wait to be finished */
ret = ksz9477_wait_alu_sta_ready(dev);
if (ret) {
dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
goto exit;
}
/* read ALU static table */
ksz9477_read_table(dev, static_table);
if (static_table[0] & ALU_V_STATIC_VALID) {
/* check this has same vid & mac address */
if (((static_table[2] >> ALU_V_FID_S) == mdb->vid) &&
((static_table[2] & ALU_V_MAC_ADDR_HI) == mac_hi) &&
static_table[3] == mac_lo) {
/* found matching one */
break;
}
}
}
/* no available entry */
if (index == dev->info->num_statics)
goto exit;
/* clear port */
static_table[1] &= ~BIT(port);
if ((static_table[1] & ALU_V_PORT_MAP) == 0) {
/* delete entry */
static_table[0] = 0;
static_table[1] = 0;
static_table[2] = 0;
static_table[3] = 0;
}
ksz9477_write_table(dev, static_table);
data = (index << shifts[ALU_STAT_INDEX]) | ALU_STAT_START;
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
/* wait to be finished */
ret = ksz9477_wait_alu_sta_ready(dev);
if (ret)
dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
exit:
mutex_unlock(&dev->alu_mutex);
return ret;
}
int ksz9477_port_mirror_add(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror,
bool ingress, struct netlink_ext_ack *extack)
{
struct ksz_device *dev = ds->priv;
u8 data;
int p;
/* Limit to one sniffer port
* Check if any of the port is already set for sniffing
* If yes, instruct the user to remove the previous entry & exit
*/
for (p = 0; p < dev->info->port_cnt; p++) {
/* Skip the current sniffing port */
if (p == mirror->to_local_port)
continue;
ksz_pread8(dev, p, P_MIRROR_CTRL, &data);
if (data & PORT_MIRROR_SNIFFER) {
NL_SET_ERR_MSG_MOD(extack,
"Sniffer port is already configured, delete existing rules & retry");
return -EBUSY;
}
}
if (ingress)
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, true);
else
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, true);
/* configure mirror port */
ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
PORT_MIRROR_SNIFFER, true);
ksz_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false);
return 0;
}
void ksz9477_port_mirror_del(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror)
{
struct ksz_device *dev = ds->priv;
bool in_use = false;
u8 data;
int p;
if (mirror->ingress)
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, false);
else
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, false);
/* Check if any of the port is still referring to sniffer port */
for (p = 0; p < dev->info->port_cnt; p++) {
ksz_pread8(dev, p, P_MIRROR_CTRL, &data);
if ((data & (PORT_MIRROR_RX | PORT_MIRROR_TX))) {
in_use = true;
break;
}
}
/* delete sniffing if there are no other mirroring rules */
if (!in_use)
ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
PORT_MIRROR_SNIFFER, false);
}
static phy_interface_t ksz9477_get_interface(struct ksz_device *dev, int port)
{
phy_interface_t interface;
bool gbit;
if (dev->info->internal_phy[port])
return PHY_INTERFACE_MODE_NA;
gbit = ksz_get_gbit(dev, port);
interface = ksz_get_xmii(dev, port, gbit);
return interface;
}
static void ksz9477_phylink_get_caps(struct dsa_switch *ds, int port,
struct phylink_config *config)
{
struct ksz_device *dev = ds->priv;
config->mac_capabilities = MAC_10 | MAC_100 | MAC_ASYM_PAUSE |
MAC_SYM_PAUSE;
if (dev->info->gbit_capable[port])
config->mac_capabilities |= MAC_1000FD;
if (ksz_is_sgmii_port(dev, port)) {
struct ksz_port *p = &dev->ports[port];
phy_interface_or(config->supported_interfaces,
config->supported_interfaces,
p->pcs->supported_interfaces);
}
ksz_phylink_get_caps(ds, port, config);
}
static int ksz9477_set_ageing_time(struct dsa_switch *ds, unsigned int msecs)
{
struct ksz_device *dev = ds->priv;
u32 secs = msecs / 1000;
u8 data, mult, value;
u32 max_val;
int ret;
#define MAX_TIMER_VAL ((1 << 8) - 1)
/* The aging timer comprises a 3-bit multiplier and an 8-bit second
* value. Either of them cannot be zero. The maximum timer is then
* 7 * 255 = 1785 seconds.
*/
if (!secs)
secs = 1;
/* Return error if too large. */
else if (secs > 7 * MAX_TIMER_VAL)
return -EINVAL;
ret = ksz_read8(dev, REG_SW_LUE_CTRL_0, &value);
if (ret < 0)
return ret;
/* Check whether there is need to update the multiplier. */
mult = FIELD_GET(SW_AGE_CNT_M, value);
max_val = MAX_TIMER_VAL;
if (mult > 0) {
/* Try to use the same multiplier already in the register as
* the hardware default uses multiplier 4 and 75 seconds for
* 300 seconds.
*/
max_val = DIV_ROUND_UP(secs, mult);
if (max_val > MAX_TIMER_VAL || max_val * mult != secs)
max_val = MAX_TIMER_VAL;
}
data = DIV_ROUND_UP(secs, max_val);
if (mult != data) {
value &= ~SW_AGE_CNT_M;
value |= FIELD_PREP(SW_AGE_CNT_M, data);
ret = ksz_write8(dev, REG_SW_LUE_CTRL_0, value);
if (ret < 0)
return ret;
}
value = DIV_ROUND_UP(secs, data);
return ksz_write8(dev, REG_SW_LUE_CTRL_3, value);
}
void ksz9477_port_queue_split(struct ksz_device *dev, int port)
{
u8 data;
if (dev->info->num_tx_queues == 8)
data = PORT_EIGHT_QUEUE;
else if (dev->info->num_tx_queues == 4)
data = PORT_FOUR_QUEUE;
else if (dev->info->num_tx_queues == 2)
data = PORT_TWO_QUEUE;
else
data = PORT_SINGLE_QUEUE;
ksz_prmw8(dev, port, REG_PORT_CTRL_0, PORT_QUEUE_SPLIT_MASK, data);
}
static void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port)
{
const u16 *regs = dev->info->regs;
struct dsa_switch *ds = dev->ds;
u16 data16;
u8 member;
/* enable tag tail for host port */
if (cpu_port)
ksz_port_cfg(dev, port, REG_PORT_CTRL_0, PORT_TAIL_TAG_ENABLE,
true);
ksz9477_port_queue_split(dev, port);
ksz_port_cfg(dev, port, REG_PORT_CTRL_0, PORT_MAC_LOOPBACK, false);
/* set back pressure */
ksz_port_cfg(dev, port, REG_PORT_MAC_CTRL_1, PORT_BACK_PRESSURE, true);
/* enable broadcast storm limit */
ksz_port_cfg(dev, port, P_BCAST_STORM_CTRL, PORT_BROADCAST_STORM, true);
/* replace priority */
ksz_port_cfg(dev, port, REG_PORT_MRI_MAC_CTRL, PORT_USER_PRIO_CEILING,
false);
ksz9477_port_cfg32(dev, port, REG_PORT_MTI_QUEUE_CTRL_0__4,
MTI_PVID_REPLACE, false);
/* force flow control for non-PHY ports only */
ksz_port_cfg(dev, port, REG_PORT_CTRL_0,
PORT_FORCE_TX_FLOW_CTRL | PORT_FORCE_RX_FLOW_CTRL,
!dev->info->internal_phy[port]);
if (cpu_port)
member = dsa_user_ports(ds);
else
member = BIT(dsa_upstream_port(ds, port));
ksz9477_cfg_port_member(dev, port, member);
/* clear pending interrupts */
if (dev->info->internal_phy[port])
ksz_pread16(dev, port, REG_PORT_PHY_INT_ENABLE, &data16);
ksz9477_port_acl_init(dev, port);
/* clear pending wake flags */
ksz_handle_wake_reason(dev, port);
/* Disable all WoL options by default. Otherwise
* ksz_switch_macaddr_get/put logic will not work properly.
*/
ksz_pwrite8(dev, port, regs[REG_PORT_PME_CTRL], 0);
}
static int ksz9477_dsa_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;
ksz9477_port_setup(dev, port, false);
ret = ksz9477_set_default_prio_queue_mapping(dev, port);
if (ret)
return ret;
return ksz_dcb_init_port(dev, port);
}
static void ksz9477_config_cpu_port(struct dsa_switch *ds)
{
struct ksz_device *dev = ds->priv;
struct ksz_port *p;
int i;
for (i = 0; i < dev->info->port_cnt; i++) {
if (dsa_is_cpu_port(ds, i) &&
(dev->info->cpu_ports & (1 << i))) {
phy_interface_t interface;
const char *prev_msg;
const char *prev_mode;
dev->cpu_port = i;
p = &dev->ports[i];
/* Read from XMII register to determine host port
* interface. If set specifically in device tree
* note the difference to help debugging.
*/
interface = ksz9477_get_interface(dev, i);
if (!p->interface) {
if (dev->compat_interface) {
dev_warn(dev->dev,
"Using legacy switch \"phy-mode\" property, because it is missing on port %d node. "
"Please update your device tree.\n",
i);
p->interface = dev->compat_interface;
} else {
p->interface = interface;
}
}
if (interface && interface != p->interface) {
prev_msg = " instead of ";
prev_mode = phy_modes(interface);
} else {
prev_msg = "";
prev_mode = "";
}
dev_info(dev->dev,
"Port%d: using phy mode %s%s%s\n",
i,
phy_modes(p->interface),
prev_msg,
prev_mode);
/* enable cpu port */
ksz9477_port_setup(dev, i, true);
}
}
for (i = 0; i < dev->info->port_cnt; i++) {
if (i == dev->cpu_port)
continue;
ksz_port_stp_state_set(ds, i, BR_STATE_DISABLED);
/* Power down the internal PHY if port is unused. */
if (dsa_is_unused_port(ds, i) && dev->info->internal_phy[i])
ksz_pwrite16(dev, i, 0x100, BMCR_PDOWN);
}
}
#define RESV_MCAST_CNT 8
static u8 reserved_mcast_map[RESV_MCAST_CNT] = { 0, 1, 3, 16, 32, 33, 2, 17 };
int ksz9477_enable_stp_addr(struct ksz_device *dev)
{
u8 i, ports, update;
const u32 *masks;
bool override;
u32 data;
int ret;
masks = dev->info->masks;
/* Enable Reserved multicast table */
ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_RESV_MCAST_ENABLE, true);
/* The reserved multicast address table has 8 entries. Each entry has
* a default value of which port to forward. It is assumed the host
* port is the last port in most of the switches, but that is not the
* case for KSZ9477 or maybe KSZ9897. For LAN937X family the default
* port is port 5, the first RGMII port. It is okay for LAN9370, a
* 5-port switch, but may not be correct for the other 8-port
* versions. It is necessary to update the whole table to forward to
* the right ports.
* Furthermore PTP messages can use a reserved multicast address and
* the host will not receive them if this table is not correct.
*/
for (i = 0; i < RESV_MCAST_CNT; i++) {
data = reserved_mcast_map[i] <<
dev->info->shifts[ALU_STAT_INDEX];
data |= ALU_STAT_START |
masks[ALU_STAT_DIRECT] |
masks[ALU_RESV_MCAST_ADDR] |
masks[ALU_STAT_READ];
ret = ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
if (ret < 0)
return ret;
/* wait to be finished */
ret = ksz9477_wait_alu_sta_ready(dev);
if (ret < 0)
return ret;
ret = ksz_read32(dev, REG_SW_ALU_VAL_B, &data);
if (ret < 0)
return ret;
override = false;
ports = data & dev->port_mask;
switch (i) {
case 0:
case 6:
/* Change the host port. */
update = BIT(dev->cpu_port);
override = true;
break;
case 2:
/* Change the host port. */
update = BIT(dev->cpu_port);
break;
case 4:
case 5:
case 7:
/* Skip the host port. */
update = dev->port_mask & ~BIT(dev->cpu_port);
break;
default:
update = ports;
break;
}
if (update != ports || override) {
data &= ~dev->port_mask;
data |= update;
/* Set Override bit to receive frame even when port is
* closed.
*/
if (override)
data |= ALU_V_OVERRIDE;
ret = ksz_write32(dev, REG_SW_ALU_VAL_B, data);
if (ret < 0)
return ret;
data = reserved_mcast_map[i] <<
dev->info->shifts[ALU_STAT_INDEX];
data |= ALU_STAT_START |
masks[ALU_STAT_DIRECT] |
masks[ALU_RESV_MCAST_ADDR] |
masks[ALU_STAT_WRITE];
ret = ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
if (ret < 0)
return ret;
/* wait to be finished */
ret = ksz9477_wait_alu_sta_ready(dev);
if (ret < 0)
return ret;
}
}
return 0;
}
static int ksz9477_setup(struct dsa_switch *ds)
{
struct ksz_device *dev = ds->priv;
u16 storm_mask, storm_rate;
struct dsa_port *dp;
struct ksz_port *p;
const u16 *regs;
int ret;
regs = dev->info->regs;
dev->vlan_cache = devm_kcalloc(dev->dev, sizeof(struct vlan_table),
dev->info->num_vlans, GFP_KERNEL);
if (!dev->vlan_cache)
return -ENOMEM;
ret = ksz9477_reset_switch(dev);
if (ret) {
dev_err(ds->dev, "failed to reset switch\n");
return ret;
}
ret = ksz_parse_drive_strength(dev);
if (ret)
return ret;
if (ksz_has_sgmii_port(dev)) {
ret = ksz9477_pcs_create(dev);
if (ret)
return ret;
}
/* set broadcast storm protection 10% rate */
storm_mask = BROADCAST_STORM_RATE;
storm_rate = (BROADCAST_STORM_VALUE * BROADCAST_STORM_PROT_RATE) / 100;
regmap_update_bits(ksz_regmap_16(dev), regs[S_BROADCAST_CTRL],
storm_mask, storm_rate);
ksz9477_config_cpu_port(ds);
ksz9477_enable_stp_addr(dev);
ds->num_tx_queues = dev->info->num_tx_queues;
regmap_update_bits(ksz_regmap_8(dev), regs[S_MULTICAST_CTRL],
MULTICAST_STORM_DISABLE, MULTICAST_STORM_DISABLE);
ksz_init_mib_timer(dev);
ds->configure_vlan_while_not_filtering = false;
ds->dscp_prio_mapping_is_global = true;
ds->mtu_enforcement_ingress = true;
/* Required for port partitioning. */
ksz9477_cfg32(dev, REG_SW_QM_CTRL__4, UNICAST_VLAN_BOUNDARY,
true);
/* Do not work correctly with tail tagging. */
ksz_cfg(dev, REG_SW_MAC_CTRL_0, SW_CHECK_LENGTH, false);
/* Enable REG_SW_MTU__2 reg by setting SW_JUMBO_PACKET */
ksz_cfg(dev, REG_SW_MAC_CTRL_1, SW_JUMBO_PACKET, true);
/* Use collision based back pressure mode. */
ksz_cfg(dev, REG_SW_MAC_CTRL_1, SW_BACK_PRESSURE,
SW_BACK_PRESSURE_COLLISION);
/* Now we can configure default MTU value */
ret = regmap_update_bits(ksz_regmap_16(dev), REG_SW_MTU__2, REG_SW_MTU_MASK,
VLAN_ETH_FRAME_LEN + ETH_FCS_LEN);
if (ret)
return ret;
/* queue based egress rate limit */
ksz_cfg(dev, REG_SW_MAC_CTRL_5, SW_OUT_RATE_LIMIT_QUEUE_BASED, true);
/* enable global MIB counter freeze function */
ksz_cfg(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FREEZE, true);
/* Make sure PME (WoL) is not enabled. If requested, it will
* be enabled by ksz_wol_pre_shutdown(). Otherwise, some PMICs
* do not like PME events changes before shutdown.
*/
ret = ksz_write8(dev, regs[REG_SW_PME_CTRL], 0);
if (ret < 0)
return ret;
/* Start with learning disabled on standalone user ports, and enabled
* on the CPU port. In lack of other finer mechanisms, learning on the
* CPU port will avoid flooding bridge local addresses on the network
* in some cases.
*/
p = &dev->ports[dev->cpu_port];
p->learning = true;
if (dev->irq > 0) {
ret = ksz_girq_setup(dev);
if (ret)
return ret;
dsa_switch_for_each_user_port(dp, dev->ds) {
ret = ksz_pirq_setup(dev, dp->index);
if (ret)
goto port_release;
if (dev->info->ptp_capable) {
ret = ksz_ptp_irq_setup(ds, dp->index);
if (ret)
goto pirq_release;
}
}
}
if (dev->info->ptp_capable) {
ret = ksz_ptp_clock_register(ds);
if (ret) {
dev_err(dev->dev, "Failed to register PTP clock: %d\n",
ret);
goto port_release;
}
}
ret = ksz_mdio_register(dev);
if (ret < 0) {
dev_err(dev->dev, "failed to register the mdio");
goto out_ptp_clock_unregister;
}
ret = ksz_dcb_init(dev);
if (ret)
goto out_ptp_clock_unregister;
/* start switch */
regmap_update_bits(ksz_regmap_8(dev), regs[S_START_CTRL],
SW_START, SW_START);
return 0;
out_ptp_clock_unregister:
if (dev->info->ptp_capable)
ksz_ptp_clock_unregister(ds);
port_release:
if (dev->irq > 0) {
dsa_switch_for_each_user_port_continue_reverse(dp, dev->ds) {
if (dev->info->ptp_capable)
ksz_ptp_irq_free(ds, dp->index);
pirq_release:
ksz_irq_free(&dev->ports[dp->index].pirq);
}
ksz_irq_free(&dev->girq);
}
return ret;
}
u32 ksz9477_get_port_addr(int port, int offset)
{
return PORT_CTRL_ADDR(port, offset);
}
static int ksz9477_tc_cbs_set_cinc(struct ksz_device *dev, int port, u32 val)
{
val = val >> 8;
return ksz_pwrite16(dev, port, REG_PORT_MTI_CREDIT_INCREMENT, val);
}
/* The KSZ9477 provides following HW features to accelerate
* HSR frames handling:
*
* 1. TX PACKET DUPLICATION FROM HOST TO SWITCH
* 2. RX PACKET DUPLICATION DISCARDING
* 3. PREVENTING PACKET LOOP IN THE RING BY SELF-ADDRESS FILTERING
*
* Only one from point 1. has the NETIF_F* flag available.
*
* Ones from point 2 and 3 are "best effort" - i.e. those will
* work correctly most of the time, but it may happen that some
* frames will not be caught - to be more specific; there is a race
* condition in hardware such that, when duplicate packets are received
* on member ports very close in time to each other, the hardware fails
* to detect that they are duplicates.
*
* Hence, the SW needs to handle those special cases. However, the speed
* up gain is considerable when above features are used.
*
* Moreover, the NETIF_F_HW_HSR_FWD feature is also enabled, as HSR frames
* can be forwarded in the switch fabric between HSR ports.
*/
#define KSZ9477_SUPPORTED_HSR_FEATURES (NETIF_F_HW_HSR_DUP | NETIF_F_HW_HSR_FWD)
static int ksz9477_hsr_join(struct dsa_switch *ds, int port,
struct net_device *hsr,
struct netlink_ext_ack *extack)
{
struct ksz_device *dev = ds->priv;
struct net_device *user;
struct dsa_port *hsr_dp;
u8 data, hsr_ports = 0;
enum hsr_version ver;
int ret;
ret = hsr_get_version(hsr, &ver);
if (ret)
return ret;
if (dev->chip_id != KSZ9477_CHIP_ID) {
NL_SET_ERR_MSG_MOD(extack, "Chip does not support HSR offload");
return -EOPNOTSUPP;
}
/* KSZ9477 can support HW offloading of only 1 HSR device */
if (dev->hsr_dev && hsr != dev->hsr_dev) {
NL_SET_ERR_MSG_MOD(extack,
"Offload supported for a single HSR");
return -EOPNOTSUPP;
}
/* KSZ9477 only supports HSR v0 and v1 */
if (!(ver == HSR_V0 || ver == HSR_V1)) {
NL_SET_ERR_MSG_MOD(extack, "Only HSR v0 and v1 supported");
return -EOPNOTSUPP;
}
/* KSZ9477 can only perform HSR offloading for up to two ports */
if (hweight8(dev->hsr_ports) >= 2) {
NL_SET_ERR_MSG_MOD(extack,
"Cannot offload more than two ports - using software HSR");
return -EOPNOTSUPP;
}
/* Self MAC address filtering, to avoid frames traversing
* the HSR ring more than once.
*/
ret = ksz_switch_macaddr_get(ds, port, extack);
if (ret)
return ret;
/* Program which port(s) shall support HSR */
ksz_rmw32(dev, REG_HSR_PORT_MAP__4, BIT(port), BIT(port));
/* Forward frames between HSR ports (i.e. bridge together HSR ports) */
if (dev->hsr_ports) {
dsa_hsr_foreach_port(hsr_dp, ds, hsr)
hsr_ports |= BIT(hsr_dp->index);
hsr_ports |= BIT(dsa_upstream_port(ds, port));
dsa_hsr_foreach_port(hsr_dp, ds, hsr)
ksz9477_cfg_port_member(dev, hsr_dp->index, hsr_ports);
}
if (!dev->hsr_ports) {
/* Enable discarding of received HSR frames */
ksz_read8(dev, REG_HSR_ALU_CTRL_0__1, &data);
data |= HSR_DUPLICATE_DISCARD;
data &= ~HSR_NODE_UNICAST;
ksz_write8(dev, REG_HSR_ALU_CTRL_0__1, data);
}
/* Enable per port self-address filtering.
* The global self-address filtering has already been enabled in the
* ksz9477_reset_switch() function.
*/
ksz_port_cfg(dev, port, REG_PORT_LUE_CTRL, PORT_SRC_ADDR_FILTER, true);
/* Setup HW supported features for lan HSR ports */
user = dsa_to_port(ds, port)->user;
user->features |= KSZ9477_SUPPORTED_HSR_FEATURES;
dev->hsr_dev = hsr;
dev->hsr_ports |= BIT(port);
return 0;
}
static int ksz9477_hsr_leave(struct dsa_switch *ds, int port,
struct net_device *hsr)
{
struct ksz_device *dev = ds->priv;
WARN_ON(dev->chip_id != KSZ9477_CHIP_ID);
/* Clear port HSR support */
ksz_rmw32(dev, REG_HSR_PORT_MAP__4, BIT(port), 0);
/* Disable forwarding frames between HSR ports */
ksz9477_cfg_port_member(dev, port, BIT(dsa_upstream_port(ds, port)));
/* Disable per port self-address filtering */
ksz_port_cfg(dev, port, REG_PORT_LUE_CTRL, PORT_SRC_ADDR_FILTER, false);
dev->hsr_ports &= ~BIT(port);
if (!dev->hsr_ports)
dev->hsr_dev = NULL;
ksz_switch_macaddr_put(ds);
return 0;
}
static int ksz9477_switch_init(struct ksz_device *dev)
{
u8 data8;
int ret;
dev->port_mask = (1 << dev->info->port_cnt) - 1;
/* turn off SPI DO Edge select */
ret = ksz_read8(dev, REG_SW_GLOBAL_SERIAL_CTRL_0, &data8);
if (ret)
return ret;
data8 &= ~SPI_AUTO_EDGE_DETECTION;
ret = ksz_write8(dev, REG_SW_GLOBAL_SERIAL_CTRL_0, data8);
if (ret)
return ret;
return 0;
}
static enum dsa_tag_protocol ksz9477_get_tag_protocol(struct dsa_switch *ds,
int port,
enum dsa_tag_protocol mp)
{
struct ksz_device *dev = ds->priv;
if (dev->chip_id == KSZ8563_CHIP_ID ||
dev->chip_id == KSZ9893_CHIP_ID ||
dev->chip_id == KSZ9563_CHIP_ID)
return DSA_TAG_PROTO_KSZ9893;
return DSA_TAG_PROTO_KSZ9477;
}
static int ksz9477_connect_tag_protocol(struct dsa_switch *ds,
enum dsa_tag_protocol proto)
{
struct ksz_tagger_data *tagger_data;
if (proto != DSA_TAG_PROTO_KSZ9893 && proto != DSA_TAG_PROTO_KSZ9477)
return -EPROTONOSUPPORT;
tagger_data = ksz_tagger_data(ds);
tagger_data->xmit_work_fn = ksz_port_deferred_xmit;
return 0;
}
static void ksz9477_set_gbit(struct ksz_device *dev, int port, bool gbit)
{
const u8 *bitval = dev->info->xmii_ctrl1;
const u16 *regs = dev->info->regs;
u8 data8;
ksz_pread8(dev, port, regs[P_XMII_CTRL_1], &data8);
data8 &= ~P_GMII_1GBIT_M;
if (gbit)
data8 |= FIELD_PREP(P_GMII_1GBIT_M, bitval[P_GMII_1GBIT]);
else
data8 |= FIELD_PREP(P_GMII_1GBIT_M, bitval[P_GMII_NOT_1GBIT]);
/* Write the updated value */
ksz_pwrite8(dev, port, regs[P_XMII_CTRL_1], data8);
}
static void ksz9477_set_100_10mbit(struct ksz_device *dev, int port, int speed)
{
const u8 *bitval = dev->info->xmii_ctrl0;
const u16 *regs = dev->info->regs;
u8 data8;
ksz_pread8(dev, port, regs[P_XMII_CTRL_0], &data8);
data8 &= ~P_MII_100MBIT_M;
if (speed == SPEED_100)
data8 |= FIELD_PREP(P_MII_100MBIT_M, bitval[P_MII_100MBIT]);
else
data8 |= FIELD_PREP(P_MII_100MBIT_M, bitval[P_MII_10MBIT]);
/* Write the updated value */
ksz_pwrite8(dev, port, regs[P_XMII_CTRL_0], data8);
}
static void ksz9477_port_set_xmii_speed(struct ksz_device *dev, int port,
int speed)
{
if (speed == SPEED_1000)
ksz9477_set_gbit(dev, port, true);
else
ksz9477_set_gbit(dev, port, false);
if (speed == SPEED_100 || speed == SPEED_10)
ksz9477_set_100_10mbit(dev, port, speed);
}
static void ksz9477_duplex_flowctrl(struct ksz_device *dev, int port, int duplex,
bool tx_pause, bool rx_pause)
{
const u8 *bitval = dev->info->xmii_ctrl0;
const u32 *masks = dev->info->masks;
const u16 *regs = dev->info->regs;
u8 mask;
u8 val;
mask = P_MII_DUPLEX_M | masks[P_MII_TX_FLOW_CTRL] |
masks[P_MII_RX_FLOW_CTRL];
if (duplex == DUPLEX_FULL)
val = FIELD_PREP(P_MII_DUPLEX_M, bitval[P_MII_FULL_DUPLEX]);
else
val = FIELD_PREP(P_MII_DUPLEX_M, bitval[P_MII_HALF_DUPLEX]);
if (tx_pause)
val |= masks[P_MII_TX_FLOW_CTRL];
if (rx_pause)
val |= masks[P_MII_RX_FLOW_CTRL];
ksz_prmw8(dev, port, regs[P_XMII_CTRL_0], mask, val);
}
static void ksz9477_port_teardown(struct dsa_switch *ds, int port)
{
struct ksz_device *dev = ds->priv;
if (dsa_is_user_port(ds, port))
ksz9477_port_acl_free(dev, port);
}
void ksz9477_phylink_mac_link_up(struct phylink_config *config,
struct phy_device *phydev,
unsigned int mode,
phy_interface_t interface,
int speed, int duplex, bool tx_pause,
bool rx_pause)
{
struct dsa_port *dp = dsa_phylink_to_port(config);
struct ksz_device *dev = dp->ds->priv;
int port = dp->index;
struct ksz_port *p;
p = &dev->ports[port];
/* Internal PHYs */
if (dev->info->internal_phy[port])
return;
p->speed = speed;
ksz9477_port_set_xmii_speed(dev, port, speed);
ksz9477_duplex_flowctrl(dev, port, duplex, tx_pause, rx_pause);
}
/**
* ksz9477_support_eee - Determine Energy Efficient Ethernet (EEE) support for a
* port
* @ds: Pointer to the DSA switch structure
* @port: Port number to check
*
* This function also documents devices where EEE was initially advertised but
* later withdrawn due to reliability issues, as described in official errata
* documents. These devices are explicitly listed to record known limitations,
* even if there is no technical necessity for runtime checks.
*
* Returns: true if the internal PHY on the given port supports fully
* operational EEE, false otherwise.
*/
static bool ksz9477_support_eee(struct dsa_switch *ds, int port)
{
struct ksz_device *dev = ds->priv;
if (!dev->info->internal_phy[port])
return false;
switch (dev->chip_id) {
case KSZ8563_CHIP_ID:
case KSZ9563_CHIP_ID:
case KSZ9893_CHIP_ID:
return true;
default:
/* KSZ8567R Errata DS80000752C Module 4 */
/* KSZ9477S Errata DS80000754A Module 4 */
/* KSZ9567S Errata DS80000756A Module 4 */
/* KSZ9896C Errata DS80000757A Module 3 */
/* KSZ9897R Errata DS80000758C Module 4 */
/* Energy Efficient Ethernet (EEE) feature select must be
* manually disabled
* The EEE feature is enabled by default, but it is not fully
* operational. It must be manually disabled through register
* controls. If not disabled, the PHY ports can auto-negotiate
* to enable EEE, and this feature can cause link drops when
* linked to another device supporting EEE.
*
* The same item appears in the errata for all switches above.
*/
break;
}
return false;
}
static struct phylink_pcs *
ksz9477_phylink_mac_select_pcs(struct phylink_config *config,
phy_interface_t interface)
{
struct dsa_port *dp = dsa_phylink_to_port(config);
struct ksz_device *dev = dp->ds->priv;
struct ksz_port *p = &dev->ports[dp->index];
if (ksz_is_sgmii_port(dev, dp->index) &&
(interface == PHY_INTERFACE_MODE_SGMII ||
interface == PHY_INTERFACE_MODE_1000BASEX))
return p->pcs;
return NULL;
}
const struct phylink_mac_ops ksz9477_phylink_mac_ops = {
.mac_config = ksz_phylink_mac_config,
.mac_link_down = ksz_phylink_mac_link_down,
.mac_link_up = ksz9477_phylink_mac_link_up,
.mac_disable_tx_lpi = ksz_phylink_mac_disable_tx_lpi,
.mac_enable_tx_lpi = ksz_phylink_mac_enable_tx_lpi,
.mac_select_pcs = ksz9477_phylink_mac_select_pcs,
};
const struct ksz_dev_ops ksz9477_dev_ops = {
.get_port_addr = ksz9477_get_port_addr,
.cfg_port_member = ksz9477_cfg_port_member,
.r_mib_cnt = ksz9477_r_mib_cnt,
.r_mib_pkt = ksz9477_r_mib_pkt,
.r_mib_stat64 = ksz_r_mib_stats64,
.freeze_mib = ksz9477_freeze_mib,
.port_init_cnt = ksz9477_port_init_cnt,
.pme_write8 = ksz_write8,
.pme_pread8 = ksz_pread8,
.pme_pwrite8 = ksz_pwrite8,
.tc_cbs_set_cinc = ksz9477_tc_cbs_set_cinc,
.init = ksz9477_switch_init,
};
const struct dsa_switch_ops ksz9477_switch_ops = {
.get_tag_protocol = ksz9477_get_tag_protocol,
.connect_tag_protocol = ksz9477_connect_tag_protocol,
.setup = ksz9477_setup,
.teardown = ksz_teardown,
.phy_read = ksz9477_phy_read16,
.phy_write = ksz9477_phy_write16,
.phylink_get_caps = ksz9477_phylink_get_caps,
.port_setup = ksz9477_dsa_port_setup,
.set_ageing_time = ksz9477_set_ageing_time,
.get_strings = ksz_get_strings,
.get_ethtool_stats = ksz_get_ethtool_stats,
.get_sset_count = ksz_sset_count,
.port_bridge_join = ksz_port_bridge_join,
.port_bridge_leave = ksz_port_bridge_leave,
.port_hsr_join = ksz9477_hsr_join,
.port_hsr_leave = ksz9477_hsr_leave,
.port_set_mac_address = ksz_port_set_mac_address,
.port_stp_state_set = ksz_port_stp_state_set,
.port_teardown = ksz9477_port_teardown,
.port_pre_bridge_flags = ksz_port_pre_bridge_flags,
.port_bridge_flags = ksz_port_bridge_flags,
.port_fast_age = ksz9477_flush_dyn_mac_table,
.port_vlan_filtering = ksz9477_port_vlan_filtering,
.port_vlan_add = ksz9477_port_vlan_add,
.port_vlan_del = ksz9477_port_vlan_del,
.port_fdb_dump = ksz9477_fdb_dump,
.port_fdb_add = ksz9477_fdb_add,
.port_fdb_del = ksz9477_fdb_del,
.port_mdb_add = ksz9477_mdb_add,
.port_mdb_del = ksz9477_mdb_del,
.port_mirror_add = ksz9477_port_mirror_add,
.port_mirror_del = ksz9477_port_mirror_del,
.get_stats64 = ksz_get_stats64,
.get_pause_stats = ksz_get_pause_stats,
.port_change_mtu = ksz9477_change_mtu,
.port_max_mtu = ksz_max_mtu,
.get_wol = ksz_get_wol,
.set_wol = ksz_set_wol,
.suspend = ksz_suspend,
.resume = ksz_resume,
.get_ts_info = ksz_get_ts_info,
.port_hwtstamp_get = ksz_hwtstamp_get,
.port_hwtstamp_set = ksz_hwtstamp_set,
.port_txtstamp = ksz_port_txtstamp,
.port_rxtstamp = ksz_port_rxtstamp,
.cls_flower_add = ksz9477_cls_flower_add,
.cls_flower_del = ksz9477_cls_flower_del,
.port_setup_tc = ksz_setup_tc,
.support_eee = ksz9477_support_eee,
.set_mac_eee = ksz_set_mac_eee,
.port_get_default_prio = ksz_port_get_default_prio,
.port_set_default_prio = ksz_port_set_default_prio,
.port_get_dscp_prio = ksz_port_get_dscp_prio,
.port_add_dscp_prio = ksz_port_add_dscp_prio,
.port_del_dscp_prio = ksz_port_del_dscp_prio,
.port_get_apptrust = ksz_port_get_apptrust,
.port_set_apptrust = ksz_port_set_apptrust,
};
MODULE_AUTHOR("Woojung Huh <Woojung.Huh@microchip.com>");
MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch DSA Driver");
MODULE_LICENSE("GPL");
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