diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/dsa/xrs700x/xrs700x.c | 827 |
1 files changed, 827 insertions, 0 deletions
diff --git a/drivers/net/dsa/xrs700x/xrs700x.c b/drivers/net/dsa/xrs700x/xrs700x.c new file mode 100644 index 000000000..fa622639d --- /dev/null +++ b/drivers/net/dsa/xrs700x/xrs700x.c @@ -0,0 +1,827 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 NovaTech LLC + * George McCollister <george.mccollister@gmail.com> + */ + +#include <net/dsa.h> +#include <linux/etherdevice.h> +#include <linux/if_bridge.h> +#include <linux/of_device.h> +#include <linux/netdev_features.h> +#include <linux/if_hsr.h> +#include "xrs700x.h" +#include "xrs700x_reg.h" + +#define XRS700X_MIB_INTERVAL msecs_to_jiffies(3000) + +#define XRS7000X_SUPPORTED_HSR_FEATURES \ + (NETIF_F_HW_HSR_TAG_INS | NETIF_F_HW_HSR_TAG_RM | \ + NETIF_F_HW_HSR_FWD | NETIF_F_HW_HSR_DUP) + +#define XRS7003E_ID 0x100 +#define XRS7003F_ID 0x101 +#define XRS7004E_ID 0x200 +#define XRS7004F_ID 0x201 + +const struct xrs700x_info xrs7003e_info = {XRS7003E_ID, "XRS7003E", 3}; +EXPORT_SYMBOL(xrs7003e_info); + +const struct xrs700x_info xrs7003f_info = {XRS7003F_ID, "XRS7003F", 3}; +EXPORT_SYMBOL(xrs7003f_info); + +const struct xrs700x_info xrs7004e_info = {XRS7004E_ID, "XRS7004E", 4}; +EXPORT_SYMBOL(xrs7004e_info); + +const struct xrs700x_info xrs7004f_info = {XRS7004F_ID, "XRS7004F", 4}; +EXPORT_SYMBOL(xrs7004f_info); + +struct xrs700x_regfield { + struct reg_field rf; + struct regmap_field **rmf; +}; + +struct xrs700x_mib { + unsigned int offset; + const char *name; + int stats64_offset; +}; + +#define XRS700X_MIB_ETHTOOL_ONLY(o, n) {o, n, -1} +#define XRS700X_MIB(o, n, m) {o, n, offsetof(struct rtnl_link_stats64, m)} + +static const struct xrs700x_mib xrs700x_mibs[] = { + XRS700X_MIB(XRS_RX_GOOD_OCTETS_L, "rx_good_octets", rx_bytes), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_BAD_OCTETS_L, "rx_bad_octets"), + XRS700X_MIB(XRS_RX_UNICAST_L, "rx_unicast", rx_packets), + XRS700X_MIB(XRS_RX_BROADCAST_L, "rx_broadcast", rx_packets), + XRS700X_MIB(XRS_RX_MULTICAST_L, "rx_multicast", multicast), + XRS700X_MIB(XRS_RX_UNDERSIZE_L, "rx_undersize", rx_length_errors), + XRS700X_MIB(XRS_RX_FRAGMENTS_L, "rx_fragments", rx_length_errors), + XRS700X_MIB(XRS_RX_OVERSIZE_L, "rx_oversize", rx_length_errors), + XRS700X_MIB(XRS_RX_JABBER_L, "rx_jabber", rx_length_errors), + XRS700X_MIB(XRS_RX_ERR_L, "rx_err", rx_errors), + XRS700X_MIB(XRS_RX_CRC_L, "rx_crc", rx_crc_errors), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_64_L, "rx_64"), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_65_127_L, "rx_65_127"), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_128_255_L, "rx_128_255"), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_256_511_L, "rx_256_511"), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_512_1023_L, "rx_512_1023"), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_1024_1536_L, "rx_1024_1536"), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_HSR_PRP_L, "rx_hsr_prp"), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_WRONGLAN_L, "rx_wronglan"), + XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_DUPLICATE_L, "rx_duplicate"), + XRS700X_MIB(XRS_TX_OCTETS_L, "tx_octets", tx_bytes), + XRS700X_MIB(XRS_TX_UNICAST_L, "tx_unicast", tx_packets), + XRS700X_MIB(XRS_TX_BROADCAST_L, "tx_broadcast", tx_packets), + XRS700X_MIB(XRS_TX_MULTICAST_L, "tx_multicast", tx_packets), + XRS700X_MIB_ETHTOOL_ONLY(XRS_TX_HSR_PRP_L, "tx_hsr_prp"), + XRS700X_MIB(XRS_PRIQ_DROP_L, "priq_drop", tx_dropped), + XRS700X_MIB(XRS_EARLY_DROP_L, "early_drop", tx_dropped), +}; + +static const u8 eth_hsrsup_addr[ETH_ALEN] = { + 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00}; + +static void xrs700x_get_strings(struct dsa_switch *ds, int port, + u32 stringset, u8 *data) +{ + int i; + + if (stringset != ETH_SS_STATS) + return; + + for (i = 0; i < ARRAY_SIZE(xrs700x_mibs); i++) { + strscpy(data, xrs700x_mibs[i].name, ETH_GSTRING_LEN); + data += ETH_GSTRING_LEN; + } +} + +static int xrs700x_get_sset_count(struct dsa_switch *ds, int port, int sset) +{ + if (sset != ETH_SS_STATS) + return -EOPNOTSUPP; + + return ARRAY_SIZE(xrs700x_mibs); +} + +static void xrs700x_read_port_counters(struct xrs700x *priv, int port) +{ + struct xrs700x_port *p = &priv->ports[port]; + struct rtnl_link_stats64 stats; + unsigned long flags; + int i; + + memset(&stats, 0, sizeof(stats)); + + mutex_lock(&p->mib_mutex); + + /* Capture counter values */ + regmap_write(priv->regmap, XRS_CNT_CTRL(port), 1); + + for (i = 0; i < ARRAY_SIZE(xrs700x_mibs); i++) { + unsigned int high = 0, low = 0, reg; + + reg = xrs700x_mibs[i].offset + XRS_PORT_OFFSET * port; + regmap_read(priv->regmap, reg, &low); + regmap_read(priv->regmap, reg + 2, &high); + + p->mib_data[i] += (high << 16) | low; + + if (xrs700x_mibs[i].stats64_offset >= 0) { + u8 *s = (u8 *)&stats + xrs700x_mibs[i].stats64_offset; + *(u64 *)s += p->mib_data[i]; + } + } + + /* multicast must be added to rx_packets (which already includes + * unicast and broadcast) + */ + stats.rx_packets += stats.multicast; + + flags = u64_stats_update_begin_irqsave(&p->syncp); + p->stats64 = stats; + u64_stats_update_end_irqrestore(&p->syncp, flags); + + mutex_unlock(&p->mib_mutex); +} + +static void xrs700x_mib_work(struct work_struct *work) +{ + struct xrs700x *priv = container_of(work, struct xrs700x, + mib_work.work); + int i; + + for (i = 0; i < priv->ds->num_ports; i++) + xrs700x_read_port_counters(priv, i); + + schedule_delayed_work(&priv->mib_work, XRS700X_MIB_INTERVAL); +} + +static void xrs700x_get_ethtool_stats(struct dsa_switch *ds, int port, + u64 *data) +{ + struct xrs700x *priv = ds->priv; + struct xrs700x_port *p = &priv->ports[port]; + + xrs700x_read_port_counters(priv, port); + + mutex_lock(&p->mib_mutex); + memcpy(data, p->mib_data, sizeof(*data) * ARRAY_SIZE(xrs700x_mibs)); + mutex_unlock(&p->mib_mutex); +} + +static void xrs700x_get_stats64(struct dsa_switch *ds, int port, + struct rtnl_link_stats64 *s) +{ + struct xrs700x *priv = ds->priv; + struct xrs700x_port *p = &priv->ports[port]; + unsigned int start; + + do { + start = u64_stats_fetch_begin(&p->syncp); + *s = p->stats64; + } while (u64_stats_fetch_retry(&p->syncp, start)); +} + +static int xrs700x_setup_regmap_range(struct xrs700x *priv) +{ + struct xrs700x_regfield regfields[] = { + { + .rf = REG_FIELD_ID(XRS_PORT_STATE(0), 0, 1, + priv->ds->num_ports, + XRS_PORT_OFFSET), + .rmf = &priv->ps_forward + }, + { + .rf = REG_FIELD_ID(XRS_PORT_STATE(0), 2, 3, + priv->ds->num_ports, + XRS_PORT_OFFSET), + .rmf = &priv->ps_management + }, + { + .rf = REG_FIELD_ID(XRS_PORT_STATE(0), 4, 9, + priv->ds->num_ports, + XRS_PORT_OFFSET), + .rmf = &priv->ps_sel_speed + }, + { + .rf = REG_FIELD_ID(XRS_PORT_STATE(0), 10, 11, + priv->ds->num_ports, + XRS_PORT_OFFSET), + .rmf = &priv->ps_cur_speed + } + }; + int i = 0; + + for (; i < ARRAY_SIZE(regfields); i++) { + *regfields[i].rmf = devm_regmap_field_alloc(priv->dev, + priv->regmap, + regfields[i].rf); + if (IS_ERR(*regfields[i].rmf)) + return PTR_ERR(*regfields[i].rmf); + } + + return 0; +} + +static enum dsa_tag_protocol xrs700x_get_tag_protocol(struct dsa_switch *ds, + int port, + enum dsa_tag_protocol m) +{ + return DSA_TAG_PROTO_XRS700X; +} + +static int xrs700x_reset(struct dsa_switch *ds) +{ + struct xrs700x *priv = ds->priv; + unsigned int val; + int ret; + + ret = regmap_write(priv->regmap, XRS_GENERAL, XRS_GENERAL_RESET); + if (ret) + goto error; + + ret = regmap_read_poll_timeout(priv->regmap, XRS_GENERAL, + val, !(val & XRS_GENERAL_RESET), + 10, 1000); +error: + if (ret) { + dev_err_ratelimited(priv->dev, "error resetting switch: %d\n", + ret); + } + + return ret; +} + +static void xrs700x_port_stp_state_set(struct dsa_switch *ds, int port, + u8 state) +{ + struct xrs700x *priv = ds->priv; + unsigned int bpdus = 1; + unsigned int val; + + switch (state) { + case BR_STATE_DISABLED: + bpdus = 0; + fallthrough; + case BR_STATE_BLOCKING: + case BR_STATE_LISTENING: + val = XRS_PORT_DISABLED; + break; + case BR_STATE_LEARNING: + val = XRS_PORT_LEARNING; + break; + case BR_STATE_FORWARDING: + val = XRS_PORT_FORWARDING; + break; + default: + dev_err(ds->dev, "invalid STP state: %d\n", state); + return; + } + + regmap_fields_write(priv->ps_forward, port, val); + + /* Enable/disable inbound policy added by xrs700x_port_add_bpdu_ipf() + * which allows BPDU forwarding to the CPU port when the front facing + * port is in disabled/learning state. + */ + regmap_update_bits(priv->regmap, XRS_ETH_ADDR_CFG(port, 0), 1, bpdus); + + dev_dbg_ratelimited(priv->dev, "%s - port: %d, state: %u, val: 0x%x\n", + __func__, port, state, val); +} + +/* Add an inbound policy filter which matches the BPDU destination MAC + * and forwards to the CPU port. Leave the policy disabled, it will be + * enabled as needed. + */ +static int xrs700x_port_add_bpdu_ipf(struct dsa_switch *ds, int port) +{ + struct xrs700x *priv = ds->priv; + unsigned int val = 0; + int i = 0; + int ret; + + /* Compare all 48 bits of the destination MAC address. */ + ret = regmap_write(priv->regmap, XRS_ETH_ADDR_CFG(port, 0), 48 << 2); + if (ret) + return ret; + + /* match BPDU destination 01:80:c2:00:00:00 */ + for (i = 0; i < sizeof(eth_stp_addr); i += 2) { + ret = regmap_write(priv->regmap, XRS_ETH_ADDR_0(port, 0) + i, + eth_stp_addr[i] | + (eth_stp_addr[i + 1] << 8)); + if (ret) + return ret; + } + + /* Mirror BPDU to CPU port */ + for (i = 0; i < ds->num_ports; i++) { + if (dsa_is_cpu_port(ds, i)) + val |= BIT(i); + } + + ret = regmap_write(priv->regmap, XRS_ETH_ADDR_FWD_MIRROR(port, 0), val); + if (ret) + return ret; + + ret = regmap_write(priv->regmap, XRS_ETH_ADDR_FWD_ALLOW(port, 0), 0); + if (ret) + return ret; + + return 0; +} + +/* Add an inbound policy filter which matches the HSR/PRP supervision MAC + * range and forwards to the CPU port without discarding duplicates. + * This is required to correctly populate the HSR/PRP node_table. + * Leave the policy disabled, it will be enabled as needed. + */ +static int xrs700x_port_add_hsrsup_ipf(struct dsa_switch *ds, int port, + int fwdport) +{ + struct xrs700x *priv = ds->priv; + unsigned int val = 0; + int i = 0; + int ret; + + /* Compare 40 bits of the destination MAC address. */ + ret = regmap_write(priv->regmap, XRS_ETH_ADDR_CFG(port, 1), 40 << 2); + if (ret) + return ret; + + /* match HSR/PRP supervision destination 01:15:4e:00:01:XX */ + for (i = 0; i < sizeof(eth_hsrsup_addr); i += 2) { + ret = regmap_write(priv->regmap, XRS_ETH_ADDR_0(port, 1) + i, + eth_hsrsup_addr[i] | + (eth_hsrsup_addr[i + 1] << 8)); + if (ret) + return ret; + } + + /* Mirror HSR/PRP supervision to CPU port */ + for (i = 0; i < ds->num_ports; i++) { + if (dsa_is_cpu_port(ds, i)) + val |= BIT(i); + } + + ret = regmap_write(priv->regmap, XRS_ETH_ADDR_FWD_MIRROR(port, 1), val); + if (ret) + return ret; + + if (fwdport >= 0) + val |= BIT(fwdport); + + /* Allow must be set prevent duplicate discard */ + ret = regmap_write(priv->regmap, XRS_ETH_ADDR_FWD_ALLOW(port, 1), val); + if (ret) + return ret; + + return 0; +} + +static int xrs700x_port_setup(struct dsa_switch *ds, int port) +{ + bool cpu_port = dsa_is_cpu_port(ds, port); + struct xrs700x *priv = ds->priv; + unsigned int val = 0; + int ret, i; + + xrs700x_port_stp_state_set(ds, port, BR_STATE_DISABLED); + + /* Disable forwarding to non-CPU ports */ + for (i = 0; i < ds->num_ports; i++) { + if (!dsa_is_cpu_port(ds, i)) + val |= BIT(i); + } + + /* 1 = Disable forwarding to the port */ + ret = regmap_write(priv->regmap, XRS_PORT_FWD_MASK(port), val); + if (ret) + return ret; + + val = cpu_port ? XRS_PORT_MODE_MANAGEMENT : XRS_PORT_MODE_NORMAL; + ret = regmap_fields_write(priv->ps_management, port, val); + if (ret) + return ret; + + if (!cpu_port) { + ret = xrs700x_port_add_bpdu_ipf(ds, port); + if (ret) + return ret; + } + + return 0; +} + +static int xrs700x_setup(struct dsa_switch *ds) +{ + struct xrs700x *priv = ds->priv; + int ret, i; + + ret = xrs700x_reset(ds); + if (ret) + return ret; + + for (i = 0; i < ds->num_ports; i++) { + ret = xrs700x_port_setup(ds, i); + if (ret) + return ret; + } + + schedule_delayed_work(&priv->mib_work, XRS700X_MIB_INTERVAL); + + return 0; +} + +static void xrs700x_teardown(struct dsa_switch *ds) +{ + struct xrs700x *priv = ds->priv; + + cancel_delayed_work_sync(&priv->mib_work); +} + +static void xrs700x_phylink_get_caps(struct dsa_switch *ds, int port, + struct phylink_config *config) +{ + switch (port) { + case 0: + __set_bit(PHY_INTERFACE_MODE_RMII, + config->supported_interfaces); + config->mac_capabilities = MAC_10FD | MAC_100FD; + break; + + case 1: + case 2: + case 3: + phy_interface_set_rgmii(config->supported_interfaces); + config->mac_capabilities = MAC_10FD | MAC_100FD | MAC_1000FD; + break; + + default: + dev_err(ds->dev, "Unsupported port: %i\n", port); + break; + } +} + +static void xrs700x_mac_link_up(struct dsa_switch *ds, int port, + unsigned int mode, phy_interface_t interface, + struct phy_device *phydev, + int speed, int duplex, + bool tx_pause, bool rx_pause) +{ + struct xrs700x *priv = ds->priv; + unsigned int val; + + switch (speed) { + case SPEED_1000: + val = XRS_PORT_SPEED_1000; + break; + case SPEED_100: + val = XRS_PORT_SPEED_100; + break; + case SPEED_10: + val = XRS_PORT_SPEED_10; + break; + default: + return; + } + + regmap_fields_write(priv->ps_sel_speed, port, val); + + dev_dbg_ratelimited(priv->dev, "%s: port: %d mode: %u speed: %u\n", + __func__, port, mode, speed); +} + +static int xrs700x_bridge_common(struct dsa_switch *ds, int port, + struct dsa_bridge bridge, bool join) +{ + unsigned int i, cpu_mask = 0, mask = 0; + struct xrs700x *priv = ds->priv; + int ret; + + for (i = 0; i < ds->num_ports; i++) { + if (dsa_is_cpu_port(ds, i)) + continue; + + cpu_mask |= BIT(i); + + if (dsa_port_offloads_bridge(dsa_to_port(ds, i), &bridge)) + continue; + + mask |= BIT(i); + } + + for (i = 0; i < ds->num_ports; i++) { + if (!dsa_port_offloads_bridge(dsa_to_port(ds, i), &bridge)) + continue; + + /* 1 = Disable forwarding to the port */ + ret = regmap_write(priv->regmap, XRS_PORT_FWD_MASK(i), mask); + if (ret) + return ret; + } + + if (!join) { + ret = regmap_write(priv->regmap, XRS_PORT_FWD_MASK(port), + cpu_mask); + if (ret) + return ret; + } + + return 0; +} + +static int xrs700x_bridge_join(struct dsa_switch *ds, int port, + struct dsa_bridge bridge, bool *tx_fwd_offload, + struct netlink_ext_ack *extack) +{ + return xrs700x_bridge_common(ds, port, bridge, true); +} + +static void xrs700x_bridge_leave(struct dsa_switch *ds, int port, + struct dsa_bridge bridge) +{ + xrs700x_bridge_common(ds, port, bridge, false); +} + +static int xrs700x_hsr_join(struct dsa_switch *ds, int port, + struct net_device *hsr) +{ + unsigned int val = XRS_HSR_CFG_HSR_PRP; + struct dsa_port *partner = NULL, *dp; + struct xrs700x *priv = ds->priv; + struct net_device *slave; + int ret, i, hsr_pair[2]; + enum hsr_version ver; + bool fwd = false; + + ret = hsr_get_version(hsr, &ver); + if (ret) + return ret; + + /* Only ports 1 and 2 can be HSR/PRP redundant ports. */ + if (port != 1 && port != 2) + return -EOPNOTSUPP; + + if (ver == HSR_V1) + val |= XRS_HSR_CFG_HSR; + else if (ver == PRP_V1) + val |= XRS_HSR_CFG_PRP; + else + return -EOPNOTSUPP; + + dsa_hsr_foreach_port(dp, ds, hsr) { + if (dp->index != port) { + partner = dp; + break; + } + } + + /* We can't enable redundancy on the switch until both + * redundant ports have signed up. + */ + if (!partner) + return 0; + + regmap_fields_write(priv->ps_forward, partner->index, + XRS_PORT_DISABLED); + regmap_fields_write(priv->ps_forward, port, XRS_PORT_DISABLED); + + regmap_write(priv->regmap, XRS_HSR_CFG(partner->index), + val | XRS_HSR_CFG_LANID_A); + regmap_write(priv->regmap, XRS_HSR_CFG(port), + val | XRS_HSR_CFG_LANID_B); + + /* Clear bits for both redundant ports (HSR only) and the CPU port to + * enable forwarding. + */ + val = GENMASK(ds->num_ports - 1, 0); + if (ver == HSR_V1) { + val &= ~BIT(partner->index); + val &= ~BIT(port); + fwd = true; + } + val &= ~BIT(dsa_upstream_port(ds, port)); + regmap_write(priv->regmap, XRS_PORT_FWD_MASK(partner->index), val); + regmap_write(priv->regmap, XRS_PORT_FWD_MASK(port), val); + + regmap_fields_write(priv->ps_forward, partner->index, + XRS_PORT_FORWARDING); + regmap_fields_write(priv->ps_forward, port, XRS_PORT_FORWARDING); + + /* Enable inbound policy which allows HSR/PRP supervision forwarding + * to the CPU port without discarding duplicates. Continue to + * forward to redundant ports when in HSR mode while discarding + * duplicates. + */ + ret = xrs700x_port_add_hsrsup_ipf(ds, partner->index, fwd ? port : -1); + if (ret) + return ret; + + ret = xrs700x_port_add_hsrsup_ipf(ds, port, fwd ? partner->index : -1); + if (ret) + return ret; + + regmap_update_bits(priv->regmap, + XRS_ETH_ADDR_CFG(partner->index, 1), 1, 1); + regmap_update_bits(priv->regmap, XRS_ETH_ADDR_CFG(port, 1), 1, 1); + + hsr_pair[0] = port; + hsr_pair[1] = partner->index; + for (i = 0; i < ARRAY_SIZE(hsr_pair); i++) { + slave = dsa_to_port(ds, hsr_pair[i])->slave; + slave->features |= XRS7000X_SUPPORTED_HSR_FEATURES; + } + + return 0; +} + +static int xrs700x_hsr_leave(struct dsa_switch *ds, int port, + struct net_device *hsr) +{ + struct dsa_port *partner = NULL, *dp; + struct xrs700x *priv = ds->priv; + struct net_device *slave; + int i, hsr_pair[2]; + unsigned int val; + + dsa_hsr_foreach_port(dp, ds, hsr) { + if (dp->index != port) { + partner = dp; + break; + } + } + + if (!partner) + return 0; + + regmap_fields_write(priv->ps_forward, partner->index, + XRS_PORT_DISABLED); + regmap_fields_write(priv->ps_forward, port, XRS_PORT_DISABLED); + + regmap_write(priv->regmap, XRS_HSR_CFG(partner->index), 0); + regmap_write(priv->regmap, XRS_HSR_CFG(port), 0); + + /* Clear bit for the CPU port to enable forwarding. */ + val = GENMASK(ds->num_ports - 1, 0); + val &= ~BIT(dsa_upstream_port(ds, port)); + regmap_write(priv->regmap, XRS_PORT_FWD_MASK(partner->index), val); + regmap_write(priv->regmap, XRS_PORT_FWD_MASK(port), val); + + regmap_fields_write(priv->ps_forward, partner->index, + XRS_PORT_FORWARDING); + regmap_fields_write(priv->ps_forward, port, XRS_PORT_FORWARDING); + + /* Disable inbound policy added by xrs700x_port_add_hsrsup_ipf() + * which allows HSR/PRP supervision forwarding to the CPU port without + * discarding duplicates. + */ + regmap_update_bits(priv->regmap, + XRS_ETH_ADDR_CFG(partner->index, 1), 1, 0); + regmap_update_bits(priv->regmap, XRS_ETH_ADDR_CFG(port, 1), 1, 0); + + hsr_pair[0] = port; + hsr_pair[1] = partner->index; + for (i = 0; i < ARRAY_SIZE(hsr_pair); i++) { + slave = dsa_to_port(ds, hsr_pair[i])->slave; + slave->features &= ~XRS7000X_SUPPORTED_HSR_FEATURES; + } + + return 0; +} + +static const struct dsa_switch_ops xrs700x_ops = { + .get_tag_protocol = xrs700x_get_tag_protocol, + .setup = xrs700x_setup, + .teardown = xrs700x_teardown, + .port_stp_state_set = xrs700x_port_stp_state_set, + .phylink_get_caps = xrs700x_phylink_get_caps, + .phylink_mac_link_up = xrs700x_mac_link_up, + .get_strings = xrs700x_get_strings, + .get_sset_count = xrs700x_get_sset_count, + .get_ethtool_stats = xrs700x_get_ethtool_stats, + .get_stats64 = xrs700x_get_stats64, + .port_bridge_join = xrs700x_bridge_join, + .port_bridge_leave = xrs700x_bridge_leave, + .port_hsr_join = xrs700x_hsr_join, + .port_hsr_leave = xrs700x_hsr_leave, +}; + +static int xrs700x_detect(struct xrs700x *priv) +{ + const struct xrs700x_info *info; + unsigned int id; + int ret; + + ret = regmap_read(priv->regmap, XRS_DEV_ID0, &id); + if (ret) { + dev_err(priv->dev, "error %d while reading switch id.\n", + ret); + return ret; + } + + info = of_device_get_match_data(priv->dev); + if (!info) + return -EINVAL; + + if (info->id == id) { + priv->ds->num_ports = info->num_ports; + dev_info(priv->dev, "%s detected.\n", info->name); + return 0; + } + + dev_err(priv->dev, "expected switch id 0x%x but found 0x%x.\n", + info->id, id); + + return -ENODEV; +} + +struct xrs700x *xrs700x_switch_alloc(struct device *base, void *devpriv) +{ + struct dsa_switch *ds; + struct xrs700x *priv; + + ds = devm_kzalloc(base, sizeof(*ds), GFP_KERNEL); + if (!ds) + return NULL; + + ds->dev = base; + + priv = devm_kzalloc(base, sizeof(*priv), GFP_KERNEL); + if (!priv) + return NULL; + + INIT_DELAYED_WORK(&priv->mib_work, xrs700x_mib_work); + + ds->ops = &xrs700x_ops; + ds->priv = priv; + priv->dev = base; + + priv->ds = ds; + priv->priv = devpriv; + + return priv; +} +EXPORT_SYMBOL(xrs700x_switch_alloc); + +static int xrs700x_alloc_port_mib(struct xrs700x *priv, int port) +{ + struct xrs700x_port *p = &priv->ports[port]; + + p->mib_data = devm_kcalloc(priv->dev, ARRAY_SIZE(xrs700x_mibs), + sizeof(*p->mib_data), GFP_KERNEL); + if (!p->mib_data) + return -ENOMEM; + + mutex_init(&p->mib_mutex); + u64_stats_init(&p->syncp); + + return 0; +} + +int xrs700x_switch_register(struct xrs700x *priv) +{ + int ret; + int i; + + ret = xrs700x_detect(priv); + if (ret) + return ret; + + ret = xrs700x_setup_regmap_range(priv); + if (ret) + return ret; + + priv->ports = devm_kcalloc(priv->dev, priv->ds->num_ports, + sizeof(*priv->ports), GFP_KERNEL); + if (!priv->ports) + return -ENOMEM; + + for (i = 0; i < priv->ds->num_ports; i++) { + ret = xrs700x_alloc_port_mib(priv, i); + if (ret) + return ret; + } + + return dsa_register_switch(priv->ds); +} +EXPORT_SYMBOL(xrs700x_switch_register); + +void xrs700x_switch_remove(struct xrs700x *priv) +{ + dsa_unregister_switch(priv->ds); +} +EXPORT_SYMBOL(xrs700x_switch_remove); + +void xrs700x_switch_shutdown(struct xrs700x *priv) +{ + dsa_switch_shutdown(priv->ds); +} +EXPORT_SYMBOL(xrs700x_switch_shutdown); + +MODULE_AUTHOR("George McCollister <george.mccollister@gmail.com>"); +MODULE_DESCRIPTION("Arrow SpeedChips XRS700x DSA driver"); +MODULE_LICENSE("GPL v2"); |