diff options
Diffstat (limited to 'drivers/net/dsa/microchip/ksz_common.c')
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.c | 104 |
1 files changed, 92 insertions, 12 deletions
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) { |