diff options
| -rw-r--r-- | drivers/net/dsa/microchip/ksz9477.c | 103 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz9477.h | 1 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz9477_i2c.c | 5 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.c | 104 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.h | 6 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_spi.c | 5 |
6 files changed, 200 insertions, 24 deletions
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c index 2534c3d122e4..f24181086e16 100644 --- a/drivers/net/dsa/microchip/ksz9477.c +++ b/drivers/net/dsa/microchip/ksz9477.c @@ -81,7 +81,8 @@ static int ksz9477_handle_wake_reason(struct ksz_device *dev, int port) if (!pme_status) return 0; - dev_dbg(dev->dev, "Wake event on port %d due to:%s%s\n", port, + dev_dbg(dev->dev, "Wake event on port %d due to:%s%s%s\n", port, + pme_status & PME_WOL_MAGICPKT ? " \"Magic Packet\"" : "", pme_status & PME_WOL_LINKUP ? " \"Link Up\"" : "", pme_status & PME_WOL_ENERGY ? " \"Enery detect\"" : ""); @@ -109,10 +110,19 @@ void ksz9477_get_wol(struct ksz_device *dev, int port, wol->supported = WAKE_PHY; + /* Check if the current MAC address on this port can be set + * as global for WAKE_MAGIC support. The result may vary + * dynamically based on other ports configurations. + */ + if (ksz_is_port_mac_global_usable(dev->ds, port)) + wol->supported |= WAKE_MAGIC; + ret = ksz_pread8(dev, port, REG_PORT_PME_CTRL, &pme_ctrl); if (ret) return; + if (pme_ctrl & PME_WOL_MAGICPKT) + wol->wolopts |= WAKE_MAGIC; if (pme_ctrl & (PME_WOL_LINKUP | PME_WOL_ENERGY)) wol->wolopts |= WAKE_PHY; } @@ -134,10 +144,12 @@ void ksz9477_get_wol(struct ksz_device *dev, int port, int ksz9477_set_wol(struct ksz_device *dev, int port, struct ethtool_wolinfo *wol) { - u8 pme_ctrl = 0; + u8 pme_ctrl = 0, pme_ctrl_old = 0; + bool magic_switched_off; + bool magic_switched_on; int ret; - if (wol->wolopts & ~WAKE_PHY) + if (wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC)) return -EINVAL; if (!dev->wakeup_source) @@ -147,10 +159,82 @@ int ksz9477_set_wol(struct ksz_device *dev, int port, if (ret) return ret; + if (wol->wolopts & WAKE_MAGIC) + pme_ctrl |= PME_WOL_MAGICPKT; if (wol->wolopts & WAKE_PHY) pme_ctrl |= PME_WOL_LINKUP | PME_WOL_ENERGY; - return ksz_pwrite8(dev, port, REG_PORT_PME_CTRL, pme_ctrl); + ret = ksz_pread8(dev, port, REG_PORT_PME_CTRL, &pme_ctrl_old); + if (ret) + return ret; + + if (pme_ctrl_old == pme_ctrl) + return 0; + + magic_switched_off = (pme_ctrl_old & PME_WOL_MAGICPKT) && + !(pme_ctrl & PME_WOL_MAGICPKT); + magic_switched_on = !(pme_ctrl_old & PME_WOL_MAGICPKT) && + (pme_ctrl & PME_WOL_MAGICPKT); + + /* To keep reference count of MAC address, we should do this + * operation only on change of WOL settings. + */ + if (magic_switched_on) { + ret = ksz_switch_macaddr_get(dev->ds, port, NULL); + if (ret) + return ret; + } else if (magic_switched_off) { + ksz_switch_macaddr_put(dev->ds); + } + + ret = ksz_pwrite8(dev, port, REG_PORT_PME_CTRL, pme_ctrl); + if (ret) { + if (magic_switched_on) + ksz_switch_macaddr_put(dev->ds); + return ret; + } + + return 0; +} + +/** + * ksz9477_wol_pre_shutdown - Prepares the switch device for shutdown while + * considering Wake-on-LAN (WoL) settings. + * @dev: The switch device structure. + * @wol_enabled: Pointer to a boolean which will be set to true if WoL is + * enabled on any port. + * + * This function prepares the switch device for a safe shutdown while taking + * into account the Wake-on-LAN (WoL) settings on the user ports. It updates + * the wol_enabled flag accordingly to reflect whether WoL is active on any + * port. + */ +void ksz9477_wol_pre_shutdown(struct ksz_device *dev, bool *wol_enabled) +{ + struct dsa_port *dp; + int ret; + + *wol_enabled = false; + + if (!dev->wakeup_source) + return; + + dsa_switch_for_each_user_port(dp, dev->ds) { + u8 pme_ctrl = 0; + + ret = ksz_pread8(dev, dp->index, REG_PORT_PME_CTRL, &pme_ctrl); + if (!ret && pme_ctrl) + *wol_enabled = true; + + /* make sure there are no pending wake events which would + * prevent the device from going to sleep/shutdown. + */ + ksz9477_handle_wake_reason(dev, dp->index); + } + + /* Now we are save to enable PME pin. */ + if (*wol_enabled) + ksz_write8(dev, REG_SW_PME_CTRL, PME_ENABLE); } static int ksz9477_wait_vlan_ctrl_ready(struct ksz_device *dev) @@ -1106,6 +1190,11 @@ void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port) /* clear pending wake flags */ ksz9477_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, REG_PORT_PME_CTRL, 0); } void ksz9477_config_cpu_port(struct dsa_switch *ds) @@ -1228,6 +1317,12 @@ int ksz9477_setup(struct dsa_switch *ds) /* 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 ksz9477_wol_pre_shutdown(). Otherwise, some PMICs do not + * like PME events changes before shutdown. + */ + ksz_write8(dev, REG_SW_PME_CTRL, 0); + return 0; } diff --git a/drivers/net/dsa/microchip/ksz9477.h b/drivers/net/dsa/microchip/ksz9477.h index fa8d0318b437..ce1e656b800b 100644 --- a/drivers/net/dsa/microchip/ksz9477.h +++ b/drivers/net/dsa/microchip/ksz9477.h @@ -62,6 +62,7 @@ void ksz9477_get_wol(struct ksz_device *dev, int port, struct ethtool_wolinfo *wol); int ksz9477_set_wol(struct ksz_device *dev, int port, struct ethtool_wolinfo *wol); +void ksz9477_wol_pre_shutdown(struct ksz_device *dev, bool *wol_enabled); int ksz9477_port_acl_init(struct ksz_device *dev, int port); void ksz9477_port_acl_free(struct ksz_device *dev, int port); diff --git a/drivers/net/dsa/microchip/ksz9477_i2c.c b/drivers/net/dsa/microchip/ksz9477_i2c.c index 2710afad4f3a..cac4a607e54a 100644 --- a/drivers/net/dsa/microchip/ksz9477_i2c.c +++ b/drivers/net/dsa/microchip/ksz9477_i2c.c @@ -66,10 +66,7 @@ static void ksz9477_i2c_shutdown(struct i2c_client *i2c) if (!dev) return; - if (dev->dev_ops->reset) - dev->dev_ops->reset(dev); - - dsa_switch_shutdown(dev->ds); + ksz_switch_shutdown(dev); i2c_set_clientdata(i2c, NULL); } diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index de788f424a3f..3fed406fb46a 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -321,6 +321,7 @@ static const struct ksz_dev_ops ksz9477_dev_ops = { .phylink_mac_link_up = ksz9477_phylink_mac_link_up, .get_wol = ksz9477_get_wol, .set_wol = ksz9477_set_wol, + .wol_pre_shutdown = ksz9477_wol_pre_shutdown, .config_cpu_port = ksz9477_config_cpu_port, .tc_cbs_set_cinc = ksz9477_tc_cbs_set_cinc, .enable_stp_addr = ksz9477_enable_stp_addr, @@ -3569,6 +3570,7 @@ static int ksz_port_set_mac_address(struct dsa_switch *ds, int port, const unsigned char *addr) { struct dsa_port *dp = dsa_to_port(ds, port); + struct ethtool_wolinfo wol; if (dp->hsr_dev) { dev_err(ds->dev, @@ -3577,25 +3579,69 @@ static int ksz_port_set_mac_address(struct dsa_switch *ds, int port, return -EBUSY; } + ksz_get_wol(ds, dp->index, &wol); + if (wol.wolopts & WAKE_MAGIC) { + dev_err(ds->dev, + "Cannot change MAC address on port %d with active Wake on Magic Packet\n", + port); + return -EBUSY; + } + return 0; } -/* Program the switch's MAC address register with the MAC address of the - * requesting user port. This single address is used by the switch for multiple - * features, like HSR self-address filtering and WoL. Other user ports are - * allowed to share ownership of this address as long as their MAC address is - * the same. The user ports' MAC addresses must not change while they have - * ownership of the switch MAC address. +/** + * ksz_is_port_mac_global_usable - Check if the MAC address on a given port + * can be used as a global address. + * @ds: Pointer to the DSA switch structure. + * @port: The port number on which the MAC address is to be checked. + * + * This function examines the MAC address set on the specified port and + * determines if it can be used as a global address for the switch. + * + * Return: true if the port's MAC address can be used as a global address, false + * otherwise. */ -static int ksz_switch_macaddr_get(struct dsa_switch *ds, int port, - struct netlink_ext_ack *extack) +bool ksz_is_port_mac_global_usable(struct dsa_switch *ds, int port) +{ + struct net_device *user = dsa_to_port(ds, port)->user; + const unsigned char *addr = user->dev_addr; + struct ksz_switch_macaddr *switch_macaddr; + struct ksz_device *dev = ds->priv; + + ASSERT_RTNL(); + + switch_macaddr = dev->switch_macaddr; + if (switch_macaddr && !ether_addr_equal(switch_macaddr->addr, addr)) + return false; + + return true; +} + +/** + * ksz_switch_macaddr_get - Program the switch's MAC address register. + * @ds: DSA switch instance. + * @port: Port number. + * @extack: Netlink extended acknowledgment. + * + * This function programs the switch's MAC address register with the MAC address + * of the requesting user port. This single address is used by the switch for + * multiple features like HSR self-address filtering and WoL. Other user ports + * can share ownership of this address as long as their MAC address is the same. + * The MAC addresses of user ports must not change while they have ownership of + * the switch MAC address. + * + * Return: 0 on success, or other error codes on failure. + */ +int ksz_switch_macaddr_get(struct dsa_switch *ds, int port, + struct netlink_ext_ack *extack) { struct net_device *user = dsa_to_port(ds, port)->user; const unsigned char *addr = user->dev_addr; struct ksz_switch_macaddr *switch_macaddr; struct ksz_device *dev = ds->priv; const u16 *regs = dev->info->regs; - int i; + int i, ret; /* Make sure concurrent MAC address changes are blocked */ ASSERT_RTNL(); @@ -3622,13 +3668,23 @@ static int ksz_switch_macaddr_get(struct dsa_switch *ds, int port, dev->switch_macaddr = switch_macaddr; /* Program the switch MAC address to hardware */ - for (i = 0; i < ETH_ALEN; i++) - ksz_write8(dev, regs[REG_SW_MAC_ADDR] + i, addr[i]); + for (i = 0; i < ETH_ALEN; i++) { + ret = ksz_write8(dev, regs[REG_SW_MAC_ADDR] + i, addr[i]); + if (ret) + goto macaddr_drop; + } return 0; + +macaddr_drop: + dev->switch_macaddr = NULL; + refcount_set(&switch_macaddr->refcount, 0); + kfree(switch_macaddr); + + return ret; } -static void ksz_switch_macaddr_put(struct dsa_switch *ds) +void ksz_switch_macaddr_put(struct dsa_switch *ds) { struct ksz_switch_macaddr *switch_macaddr; struct ksz_device *dev = ds->priv; @@ -3790,6 +3846,30 @@ struct ksz_device *ksz_switch_alloc(struct device *base, void *priv) } EXPORT_SYMBOL(ksz_switch_alloc); +/** + * ksz_switch_shutdown - Shutdown routine for the switch device. + * @dev: The switch device structure. + * + * This function is responsible for initiating a shutdown sequence for the + * switch device. It invokes the reset operation defined in the device + * operations, if available, to reset the switch. Subsequently, it calls the + * DSA framework's shutdown function to ensure a proper shutdown of the DSA + * switch. + */ +void ksz_switch_shutdown(struct ksz_device *dev) +{ + bool wol_enabled = false; + + if (dev->dev_ops->wol_pre_shutdown) + dev->dev_ops->wol_pre_shutdown(dev, &wol_enabled); + + if (dev->dev_ops->reset && !wol_enabled) + dev->dev_ops->reset(dev); + + dsa_switch_shutdown(dev->ds); +} +EXPORT_SYMBOL(ksz_switch_shutdown); + static void ksz_parse_rgmii_delay(struct ksz_device *dev, int port_num, struct device_node *port_dn) { diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h index a7394175fcf6..b7e8a403a132 100644 --- a/drivers/net/dsa/microchip/ksz_common.h +++ b/drivers/net/dsa/microchip/ksz_common.h @@ -378,6 +378,7 @@ struct ksz_dev_ops { struct ethtool_wolinfo *wol); int (*set_wol)(struct ksz_device *dev, int port, struct ethtool_wolinfo *wol); + void (*wol_pre_shutdown)(struct ksz_device *dev, bool *wol_enabled); void (*config_cpu_port)(struct dsa_switch *ds); int (*enable_stp_addr)(struct ksz_device *dev); int (*reset)(struct ksz_device *dev); @@ -390,12 +391,17 @@ int ksz_switch_register(struct ksz_device *dev); void ksz_switch_remove(struct ksz_device *dev); void ksz_init_mib_timer(struct ksz_device *dev); +bool ksz_is_port_mac_global_usable(struct dsa_switch *ds, int port); void ksz_r_mib_stats64(struct ksz_device *dev, int port); void ksz88xx_r_mib_stats64(struct ksz_device *dev, int port); void ksz_port_stp_state_set(struct dsa_switch *ds, int port, u8 state); bool ksz_get_gbit(struct ksz_device *dev, int port); phy_interface_t ksz_get_xmii(struct ksz_device *dev, int port, bool gbit); extern const struct ksz_chip_data ksz_switch_chips[]; +int ksz_switch_macaddr_get(struct dsa_switch *ds, int port, + struct netlink_ext_ack *extack); +void ksz_switch_macaddr_put(struct dsa_switch *ds); +void ksz_switch_shutdown(struct ksz_device *dev); /* Common register access functions */ static inline struct regmap *ksz_regmap_8(struct ksz_device *dev) diff --git a/drivers/net/dsa/microchip/ksz_spi.c b/drivers/net/dsa/microchip/ksz_spi.c index 279338451621..6f6d878e742c 100644 --- a/drivers/net/dsa/microchip/ksz_spi.c +++ b/drivers/net/dsa/microchip/ksz_spi.c @@ -114,10 +114,7 @@ static void ksz_spi_shutdown(struct spi_device *spi) if (!dev) return; - if (dev->dev_ops->reset) - dev->dev_ops->reset(dev); - - dsa_switch_shutdown(dev->ds); + ksz_switch_shutdown(dev); spi_set_drvdata(spi, NULL); } |