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path: root/drivers/net/dsa/sja1105/sja1105_main.c
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Diffstat (limited to 'drivers/net/dsa/sja1105/sja1105_main.c')
-rw-r--r--drivers/net/dsa/sja1105/sja1105_main.c1675
1 files changed, 1675 insertions, 0 deletions
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
new file mode 100644
index 000000000000..50ff625c85d6
--- /dev/null
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -0,0 +1,1675 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2018, Sensor-Technik Wiedemann GmbH
+ * Copyright (c) 2018-2019, Vladimir Oltean <olteanv@gmail.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/spi/spi.h>
+#include <linux/errno.h>
+#include <linux/gpio/consumer.h>
+#include <linux/phylink.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/of_device.h>
+#include <linux/netdev_features.h>
+#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/if_ether.h>
+#include <linux/dsa/8021q.h>
+#include "sja1105.h"
+
+static void sja1105_hw_reset(struct gpio_desc *gpio, unsigned int pulse_len,
+ unsigned int startup_delay)
+{
+ gpiod_set_value_cansleep(gpio, 1);
+ /* Wait for minimum reset pulse length */
+ msleep(pulse_len);
+ gpiod_set_value_cansleep(gpio, 0);
+ /* Wait until chip is ready after reset */
+ msleep(startup_delay);
+}
+
+static void
+sja1105_port_allow_traffic(struct sja1105_l2_forwarding_entry *l2_fwd,
+ int from, int to, bool allow)
+{
+ if (allow) {
+ l2_fwd[from].bc_domain |= BIT(to);
+ l2_fwd[from].reach_port |= BIT(to);
+ l2_fwd[from].fl_domain |= BIT(to);
+ } else {
+ l2_fwd[from].bc_domain &= ~BIT(to);
+ l2_fwd[from].reach_port &= ~BIT(to);
+ l2_fwd[from].fl_domain &= ~BIT(to);
+ }
+}
+
+/* Structure used to temporarily transport device tree
+ * settings into sja1105_setup
+ */
+struct sja1105_dt_port {
+ phy_interface_t phy_mode;
+ sja1105_mii_role_t role;
+};
+
+static int sja1105_init_mac_settings(struct sja1105_private *priv)
+{
+ struct sja1105_mac_config_entry default_mac = {
+ /* Enable all 8 priority queues on egress.
+ * Every queue i holds top[i] - base[i] frames.
+ * Sum of top[i] - base[i] is 511 (max hardware limit).
+ */
+ .top = {0x3F, 0x7F, 0xBF, 0xFF, 0x13F, 0x17F, 0x1BF, 0x1FF},
+ .base = {0x0, 0x40, 0x80, 0xC0, 0x100, 0x140, 0x180, 0x1C0},
+ .enabled = {true, true, true, true, true, true, true, true},
+ /* Keep standard IFG of 12 bytes on egress. */
+ .ifg = 0,
+ /* Always put the MAC speed in automatic mode, where it can be
+ * retrieved from the PHY object through phylib and
+ * sja1105_adjust_port_config.
+ */
+ .speed = SJA1105_SPEED_AUTO,
+ /* No static correction for 1-step 1588 events */
+ .tp_delin = 0,
+ .tp_delout = 0,
+ /* Disable aging for critical TTEthernet traffic */
+ .maxage = 0xFF,
+ /* Internal VLAN (pvid) to apply to untagged ingress */
+ .vlanprio = 0,
+ .vlanid = 0,
+ .ing_mirr = false,
+ .egr_mirr = false,
+ /* Don't drop traffic with other EtherType than ETH_P_IP */
+ .drpnona664 = false,
+ /* Don't drop double-tagged traffic */
+ .drpdtag = false,
+ /* Don't drop untagged traffic */
+ .drpuntag = false,
+ /* Don't retag 802.1p (VID 0) traffic with the pvid */
+ .retag = false,
+ /* Disable learning and I/O on user ports by default -
+ * STP will enable it.
+ */
+ .dyn_learn = false,
+ .egress = false,
+ .ingress = false,
+ };
+ struct sja1105_mac_config_entry *mac;
+ struct sja1105_table *table;
+ int i;
+
+ table = &priv->static_config.tables[BLK_IDX_MAC_CONFIG];
+
+ /* Discard previous MAC Configuration Table */
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+
+ table->entries = kcalloc(SJA1105_NUM_PORTS,
+ table->ops->unpacked_entry_size, GFP_KERNEL);
+ if (!table->entries)
+ return -ENOMEM;
+
+ /* Override table based on phylib DT bindings */
+ table->entry_count = SJA1105_NUM_PORTS;
+
+ mac = table->entries;
+
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ mac[i] = default_mac;
+ if (i == dsa_upstream_port(priv->ds, i)) {
+ /* STP doesn't get called for CPU port, so we need to
+ * set the I/O parameters statically.
+ */
+ mac[i].dyn_learn = true;
+ mac[i].ingress = true;
+ mac[i].egress = true;
+ }
+ }
+
+ return 0;
+}
+
+static int sja1105_init_mii_settings(struct sja1105_private *priv,
+ struct sja1105_dt_port *ports)
+{
+ struct device *dev = &priv->spidev->dev;
+ struct sja1105_xmii_params_entry *mii;
+ struct sja1105_table *table;
+ int i;
+
+ table = &priv->static_config.tables[BLK_IDX_XMII_PARAMS];
+
+ /* Discard previous xMII Mode Parameters Table */
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+
+ table->entries = kcalloc(SJA1105_MAX_XMII_PARAMS_COUNT,
+ table->ops->unpacked_entry_size, GFP_KERNEL);
+ if (!table->entries)
+ return -ENOMEM;
+
+ /* Override table based on phylib DT bindings */
+ table->entry_count = SJA1105_MAX_XMII_PARAMS_COUNT;
+
+ mii = table->entries;
+
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ switch (ports[i].phy_mode) {
+ case PHY_INTERFACE_MODE_MII:
+ mii->xmii_mode[i] = XMII_MODE_MII;
+ break;
+ case PHY_INTERFACE_MODE_RMII:
+ mii->xmii_mode[i] = XMII_MODE_RMII;
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ mii->xmii_mode[i] = XMII_MODE_RGMII;
+ break;
+ default:
+ dev_err(dev, "Unsupported PHY mode %s!\n",
+ phy_modes(ports[i].phy_mode));
+ }
+
+ mii->phy_mac[i] = ports[i].role;
+ }
+ return 0;
+}
+
+static int sja1105_init_static_fdb(struct sja1105_private *priv)
+{
+ struct sja1105_table *table;
+
+ table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP];
+
+ /* We only populate the FDB table through dynamic
+ * L2 Address Lookup entries
+ */
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+ return 0;
+}
+
+static int sja1105_init_l2_lookup_params(struct sja1105_private *priv)
+{
+ struct sja1105_table *table;
+ struct sja1105_l2_lookup_params_entry default_l2_lookup_params = {
+ /* Learned FDB entries are forgotten after 300 seconds */
+ .maxage = SJA1105_AGEING_TIME_MS(300000),
+ /* All entries within a FDB bin are available for learning */
+ .dyn_tbsz = SJA1105ET_FDB_BIN_SIZE,
+ /* 2^8 + 2^5 + 2^3 + 2^2 + 2^1 + 1 in Koopman notation */
+ .poly = 0x97,
+ /* This selects between Independent VLAN Learning (IVL) and
+ * Shared VLAN Learning (SVL)
+ */
+ .shared_learn = false,
+ /* Don't discard management traffic based on ENFPORT -
+ * we don't perform SMAC port enforcement anyway, so
+ * what we are setting here doesn't matter.
+ */
+ .no_enf_hostprt = false,
+ /* Don't learn SMAC for mac_fltres1 and mac_fltres0.
+ * Maybe correlate with no_linklocal_learn from bridge driver?
+ */
+ .no_mgmt_learn = true,
+ };
+
+ table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS];
+
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+
+ table->entries = kcalloc(SJA1105_MAX_L2_LOOKUP_PARAMS_COUNT,
+ table->ops->unpacked_entry_size, GFP_KERNEL);
+ if (!table->entries)
+ return -ENOMEM;
+
+ table->entry_count = SJA1105_MAX_L2_LOOKUP_PARAMS_COUNT;
+
+ /* This table only has a single entry */
+ ((struct sja1105_l2_lookup_params_entry *)table->entries)[0] =
+ default_l2_lookup_params;
+
+ return 0;
+}
+
+static int sja1105_init_static_vlan(struct sja1105_private *priv)
+{
+ struct sja1105_table *table;
+ struct sja1105_vlan_lookup_entry pvid = {
+ .ving_mirr = 0,
+ .vegr_mirr = 0,
+ .vmemb_port = 0,
+ .vlan_bc = 0,
+ .tag_port = 0,
+ .vlanid = 0,
+ };
+ int i;
+
+ table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
+
+ /* The static VLAN table will only contain the initial pvid of 0.
+ * All other VLANs are to be configured through dynamic entries,
+ * and kept in the static configuration table as backing memory.
+ * The pvid of 0 is sufficient to pass traffic while the ports are
+ * standalone and when vlan_filtering is disabled. When filtering
+ * gets enabled, the switchdev core sets up the VLAN ID 1 and sets
+ * it as the new pvid. Actually 'pvid 1' still comes up in 'bridge
+ * vlan' even when vlan_filtering is off, but it has no effect.
+ */
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+
+ table->entries = kcalloc(1, table->ops->unpacked_entry_size,
+ GFP_KERNEL);
+ if (!table->entries)
+ return -ENOMEM;
+
+ table->entry_count = 1;
+
+ /* VLAN ID 0: all DT-defined ports are members; no restrictions on
+ * forwarding; always transmit priority-tagged frames as untagged.
+ */
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ pvid.vmemb_port |= BIT(i);
+ pvid.vlan_bc |= BIT(i);
+ pvid.tag_port &= ~BIT(i);
+ }
+
+ ((struct sja1105_vlan_lookup_entry *)table->entries)[0] = pvid;
+ return 0;
+}
+
+static int sja1105_init_l2_forwarding(struct sja1105_private *priv)
+{
+ struct sja1105_l2_forwarding_entry *l2fwd;
+ struct sja1105_table *table;
+ int i, j;
+
+ table = &priv->static_config.tables[BLK_IDX_L2_FORWARDING];
+
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+
+ table->entries = kcalloc(SJA1105_MAX_L2_FORWARDING_COUNT,
+ table->ops->unpacked_entry_size, GFP_KERNEL);
+ if (!table->entries)
+ return -ENOMEM;
+
+ table->entry_count = SJA1105_MAX_L2_FORWARDING_COUNT;
+
+ l2fwd = table->entries;
+
+ /* First 5 entries define the forwarding rules */
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ unsigned int upstream = dsa_upstream_port(priv->ds, i);
+
+ for (j = 0; j < SJA1105_NUM_TC; j++)
+ l2fwd[i].vlan_pmap[j] = j;
+
+ if (i == upstream)
+ continue;
+
+ sja1105_port_allow_traffic(l2fwd, i, upstream, true);
+ sja1105_port_allow_traffic(l2fwd, upstream, i, true);
+ }
+ /* Next 8 entries define VLAN PCP mapping from ingress to egress.
+ * Create a one-to-one mapping.
+ */
+ for (i = 0; i < SJA1105_NUM_TC; i++)
+ for (j = 0; j < SJA1105_NUM_PORTS; j++)
+ l2fwd[SJA1105_NUM_PORTS + i].vlan_pmap[j] = i;
+
+ return 0;
+}
+
+static int sja1105_init_l2_forwarding_params(struct sja1105_private *priv)
+{
+ struct sja1105_l2_forwarding_params_entry default_l2fwd_params = {
+ /* Disallow dynamic reconfiguration of vlan_pmap */
+ .max_dynp = 0,
+ /* Use a single memory partition for all ingress queues */
+ .part_spc = { SJA1105_MAX_FRAME_MEMORY, 0, 0, 0, 0, 0, 0, 0 },
+ };
+ struct sja1105_table *table;
+
+ table = &priv->static_config.tables[BLK_IDX_L2_FORWARDING_PARAMS];
+
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+
+ table->entries = kcalloc(SJA1105_MAX_L2_FORWARDING_PARAMS_COUNT,
+ table->ops->unpacked_entry_size, GFP_KERNEL);
+ if (!table->entries)
+ return -ENOMEM;
+
+ table->entry_count = SJA1105_MAX_L2_FORWARDING_PARAMS_COUNT;
+
+ /* This table only has a single entry */
+ ((struct sja1105_l2_forwarding_params_entry *)table->entries)[0] =
+ default_l2fwd_params;
+
+ return 0;
+}
+
+static int sja1105_init_general_params(struct sja1105_private *priv)
+{
+ struct sja1105_general_params_entry default_general_params = {
+ /* Disallow dynamic changing of the mirror port */
+ .mirr_ptacu = 0,
+ .switchid = priv->ds->index,
+ /* Priority queue for link-local frames trapped to CPU */
+ .hostprio = 0,
+ .mac_fltres1 = SJA1105_LINKLOCAL_FILTER_A,
+ .mac_flt1 = SJA1105_LINKLOCAL_FILTER_A_MASK,
+ .incl_srcpt1 = true,
+ .send_meta1 = false,
+ .mac_fltres0 = SJA1105_LINKLOCAL_FILTER_B,
+ .mac_flt0 = SJA1105_LINKLOCAL_FILTER_B_MASK,
+ .incl_srcpt0 = true,
+ .send_meta0 = false,
+ /* The destination for traffic matching mac_fltres1 and
+ * mac_fltres0 on all ports except host_port. Such traffic
+ * receieved on host_port itself would be dropped, except
+ * by installing a temporary 'management route'
+ */
+ .host_port = dsa_upstream_port(priv->ds, 0),
+ /* Same as host port */
+ .mirr_port = dsa_upstream_port(priv->ds, 0),
+ /* Link-local traffic received on casc_port will be forwarded
+ * to host_port without embedding the source port and device ID
+ * info in the destination MAC address (presumably because it
+ * is a cascaded port and a downstream SJA switch already did
+ * that). Default to an invalid port (to disable the feature)
+ * and overwrite this if we find any DSA (cascaded) ports.
+ */
+ .casc_port = SJA1105_NUM_PORTS,
+ /* No TTEthernet */
+ .vllupformat = 0,
+ .vlmarker = 0,
+ .vlmask = 0,
+ /* Only update correctionField for 1-step PTP (L2 transport) */
+ .ignore2stf = 0,
+ /* Forcefully disable VLAN filtering by telling
+ * the switch that VLAN has a different EtherType.
+ */
+ .tpid = ETH_P_SJA1105,
+ .tpid2 = ETH_P_SJA1105,
+ };
+ struct sja1105_table *table;
+ int i, k = 0;
+
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ if (dsa_is_dsa_port(priv->ds, i))
+ default_general_params.casc_port = i;
+ else if (dsa_is_user_port(priv->ds, i))
+ priv->ports[i].mgmt_slot = k++;
+ }
+
+ table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
+
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+
+ table->entries = kcalloc(SJA1105_MAX_GENERAL_PARAMS_COUNT,
+ table->ops->unpacked_entry_size, GFP_KERNEL);
+ if (!table->entries)
+ return -ENOMEM;
+
+ table->entry_count = SJA1105_MAX_GENERAL_PARAMS_COUNT;
+
+ /* This table only has a single entry */
+ ((struct sja1105_general_params_entry *)table->entries)[0] =
+ default_general_params;
+
+ return 0;
+}
+
+#define SJA1105_RATE_MBPS(speed) (((speed) * 64000) / 1000)
+
+static inline void
+sja1105_setup_policer(struct sja1105_l2_policing_entry *policing,
+ int index)
+{
+ policing[index].sharindx = index;
+ policing[index].smax = 65535; /* Burst size in bytes */
+ policing[index].rate = SJA1105_RATE_MBPS(1000);
+ policing[index].maxlen = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
+ policing[index].partition = 0;
+}
+
+static int sja1105_init_l2_policing(struct sja1105_private *priv)
+{
+ struct sja1105_l2_policing_entry *policing;
+ struct sja1105_table *table;
+ int i, j, k;
+
+ table = &priv->static_config.tables[BLK_IDX_L2_POLICING];
+
+ /* Discard previous L2 Policing Table */
+ if (table->entry_count) {
+ kfree(table->entries);
+ table->entry_count = 0;
+ }
+
+ table->entries = kcalloc(SJA1105_MAX_L2_POLICING_COUNT,
+ table->ops->unpacked_entry_size, GFP_KERNEL);
+ if (!table->entries)
+ return -ENOMEM;
+
+ table->entry_count = SJA1105_MAX_L2_POLICING_COUNT;
+
+ policing = table->entries;
+
+ /* k sweeps through all unicast policers (0-39).
+ * bcast sweeps through policers 40-44.
+ */
+ for (i = 0, k = 0; i < SJA1105_NUM_PORTS; i++) {
+ int bcast = (SJA1105_NUM_PORTS * SJA1105_NUM_TC) + i;
+
+ for (j = 0; j < SJA1105_NUM_TC; j++, k++)
+ sja1105_setup_policer(policing, k);
+
+ /* Set up this port's policer for broadcast traffic */
+ sja1105_setup_policer(policing, bcast);
+ }
+ return 0;
+}
+
+static int sja1105_static_config_load(struct sja1105_private *priv,
+ struct sja1105_dt_port *ports)
+{
+ int rc;
+
+ sja1105_static_config_free(&priv->static_config);
+ rc = sja1105_static_config_init(&priv->static_config,
+ priv->info->static_ops,
+ priv->info->device_id);
+ if (rc)
+ return rc;
+
+ /* Build static configuration */
+ rc = sja1105_init_mac_settings(priv);
+ if (rc < 0)
+ return rc;
+ rc = sja1105_init_mii_settings(priv, ports);
+ if (rc < 0)
+ return rc;
+ rc = sja1105_init_static_fdb(priv);
+ if (rc < 0)
+ return rc;
+ rc = sja1105_init_static_vlan(priv);
+ if (rc < 0)
+ return rc;
+ rc = sja1105_init_l2_lookup_params(priv);
+ if (rc < 0)
+ return rc;
+ rc = sja1105_init_l2_forwarding(priv);
+ if (rc < 0)
+ return rc;
+ rc = sja1105_init_l2_forwarding_params(priv);
+ if (rc < 0)
+ return rc;
+ rc = sja1105_init_l2_policing(priv);
+ if (rc < 0)
+ return rc;
+ rc = sja1105_init_general_params(priv);
+ if (rc < 0)
+ return rc;
+
+ /* Send initial configuration to hardware via SPI */
+ return sja1105_static_config_upload(priv);
+}
+
+static int sja1105_parse_rgmii_delays(struct sja1105_private *priv,
+ const struct sja1105_dt_port *ports)
+{
+ int i;
+
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ if (ports->role == XMII_MAC)
+ continue;
+
+ if (ports->phy_mode == PHY_INTERFACE_MODE_RGMII_RXID ||
+ ports->phy_mode == PHY_INTERFACE_MODE_RGMII_ID)
+ priv->rgmii_rx_delay[i] = true;
+
+ if (ports->phy_mode == PHY_INTERFACE_MODE_RGMII_TXID ||
+ ports->phy_mode == PHY_INTERFACE_MODE_RGMII_ID)
+ priv->rgmii_tx_delay[i] = true;
+
+ if ((priv->rgmii_rx_delay[i] || priv->rgmii_tx_delay[i]) &&
+ !priv->info->setup_rgmii_delay)
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int sja1105_parse_ports_node(struct sja1105_private *priv,
+ struct sja1105_dt_port *ports,
+ struct device_node *ports_node)
+{
+ struct device *dev = &priv->spidev->dev;
+ struct device_node *child;
+
+ for_each_child_of_node(ports_node, child) {
+ struct device_node *phy_node;
+ int phy_mode;
+ u32 index;
+
+ /* Get switch port number from DT */
+ if (of_property_read_u32(child, "reg", &index) < 0) {
+ dev_err(dev, "Port number not defined in device tree "
+ "(property \"reg\")\n");
+ return -ENODEV;
+ }
+
+ /* Get PHY mode from DT */
+ phy_mode = of_get_phy_mode(child);
+ if (phy_mode < 0) {
+ dev_err(dev, "Failed to read phy-mode or "
+ "phy-interface-type property for port %d\n",
+ index);
+ return -ENODEV;
+ }
+ ports[index].phy_mode = phy_mode;
+
+ phy_node = of_parse_phandle(child, "phy-handle", 0);
+ if (!phy_node) {
+ if (!of_phy_is_fixed_link(child)) {
+ dev_err(dev, "phy-handle or fixed-link "
+ "properties missing!\n");
+ return -ENODEV;
+ }
+ /* phy-handle is missing, but fixed-link isn't.
+ * So it's a fixed link. Default to PHY role.
+ */
+ ports[index].role = XMII_PHY;
+ } else {
+ /* phy-handle present => put port in MAC role */
+ ports[index].role = XMII_MAC;
+ of_node_put(phy_node);
+ }
+
+ /* The MAC/PHY role can be overridden with explicit bindings */
+ if (of_property_read_bool(child, "sja1105,role-mac"))
+ ports[index].role = XMII_MAC;
+ else if (of_property_read_bool(child, "sja1105,role-phy"))
+ ports[index].role = XMII_PHY;
+ }
+
+ return 0;
+}
+
+static int sja1105_parse_dt(struct sja1105_private *priv,
+ struct sja1105_dt_port *ports)
+{
+ struct device *dev = &priv->spidev->dev;
+ struct device_node *switch_node = dev->of_node;
+ struct device_node *ports_node;
+ int rc;
+
+ ports_node = of_get_child_by_name(switch_node, "ports");
+ if (!ports_node) {
+ dev_err(dev, "Incorrect bindings: absent \"ports\" node\n");
+ return -ENODEV;
+ }
+
+ rc = sja1105_parse_ports_node(priv, ports, ports_node);
+ of_node_put(ports_node);
+
+ return rc;
+}
+
+/* Convert back and forth MAC speed from Mbps to SJA1105 encoding */
+static int sja1105_speed[] = {
+ [SJA1105_SPEED_AUTO] = 0,
+ [SJA1105_SPEED_10MBPS] = 10,
+ [SJA1105_SPEED_100MBPS] = 100,
+ [SJA1105_SPEED_1000MBPS] = 1000,
+};
+
+static sja1105_speed_t sja1105_get_speed_cfg(unsigned int speed_mbps)
+{
+ int i;
+
+ for (i = SJA1105_SPEED_AUTO; i <= SJA1105_SPEED_1000MBPS; i++)
+ if (sja1105_speed[i] == speed_mbps)
+ return i;
+ return -EINVAL;
+}
+
+/* Set link speed and enable/disable traffic I/O in the MAC configuration
+ * for a specific port.
+ *
+ * @speed_mbps: If 0, leave the speed unchanged, else adapt MAC to PHY speed.
+ * @enabled: Manage Rx and Tx settings for this port. If false, overrides the
+ * settings from the STP state, but not persistently (does not
+ * overwrite the static MAC info for this port).
+ */
+static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
+ int speed_mbps, bool enabled)
+{
+ struct sja1105_mac_config_entry dyn_mac;
+ struct sja1105_xmii_params_entry *mii;
+ struct sja1105_mac_config_entry *mac;
+ struct device *dev = priv->ds->dev;
+ sja1105_phy_interface_t phy_mode;
+ sja1105_speed_t speed;
+ int rc;
+
+ mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
+ mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
+
+ speed = sja1105_get_speed_cfg(speed_mbps);
+ if (speed_mbps && speed < 0) {
+ dev_err(dev, "Invalid speed %iMbps\n", speed_mbps);
+ return -EINVAL;
+ }
+
+ /* If requested, overwrite SJA1105_SPEED_AUTO from the static MAC
+ * configuration table, since this will be used for the clocking setup,
+ * and we no longer need to store it in the static config (already told
+ * hardware we want auto during upload phase).
+ */
+ if (speed_mbps)
+ mac[port].speed = speed;
+ else
+ mac[port].speed = SJA1105_SPEED_AUTO;
+
+ /* On P/Q/R/S, one can read from the device via the MAC reconfiguration
+ * tables. On E/T, MAC reconfig tables are not readable, only writable.
+ * We have to *know* what the MAC looks like. For the sake of keeping
+ * the code common, we'll use the static configuration tables as a
+ * reasonable approximation for both E/T and P/Q/R/S.
+ */
+ dyn_mac = mac[port];
+ dyn_mac.ingress = enabled && mac[port].ingress;
+ dyn_mac.egress = enabled && mac[port].egress;
+
+ /* Write to the dynamic reconfiguration tables */
+ rc = sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG,
+ port, &dyn_mac, true);
+ if (rc < 0) {
+ dev_err(dev, "Failed to write MAC config: %d\n", rc);
+ return rc;
+ }
+
+ /* Reconfigure the PLLs for the RGMII interfaces (required 125 MHz at
+ * gigabit, 25 MHz at 100 Mbps and 2.5 MHz at 10 Mbps). For MII and
+ * RMII no change of the clock setup is required. Actually, changing
+ * the clock setup does interrupt the clock signal for a certain time
+ * which causes trouble for all PHYs relying on this signal.
+ */
+ if (!enabled)
+ return 0;
+
+ phy_mode = mii->xmii_mode[port];
+ if (phy_mode != XMII_MODE_RGMII)
+ return 0;
+
+ return sja1105_clocking_setup_port(priv, port);
+}
+
+static void sja1105_adjust_link(struct dsa_switch *ds, int port,
+ struct phy_device *phydev)
+{
+ struct sja1105_private *priv = ds->priv;
+
+ if (!phydev->link)
+ sja1105_adjust_port_config(priv, port, 0, false);
+ else
+ sja1105_adjust_port_config(priv, port, phydev->speed, true);
+}
+
+static void sja1105_phylink_validate(struct dsa_switch *ds, int port,
+ unsigned long *supported,
+ struct phylink_link_state *state)
+{
+ /* Construct a new mask which exhaustively contains all link features
+ * supported by the MAC, and then apply that (logical AND) to what will
+ * be sent to the PHY for "marketing".
+ */
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
+ struct sja1105_private *priv = ds->priv;
+ struct sja1105_xmii_params_entry *mii;
+
+ mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
+
+ /* The MAC does not support pause frames, and also doesn't
+ * support half-duplex traffic modes.
+ */
+ phylink_set(mask, Autoneg);
+ phylink_set(mask, MII);
+ phylink_set(mask, 10baseT_Full);
+ phylink_set(mask, 100baseT_Full);
+ if (mii->xmii_mode[port] == XMII_MODE_RGMII)
+ phylink_set(mask, 1000baseT_Full);
+
+ bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS);
+ bitmap_and(state->advertising, state->advertising, mask,
+ __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
+/* First-generation switches have a 4-way set associative TCAM that
+ * holds the FDB entries. An FDB index spans from 0 to 1023 and is comprised of
+ * a "bin" (grouping of 4 entries) and a "way" (an entry within a bin).
+ * For the placement of a newly learnt FDB entry, the switch selects the bin
+ * based on a hash function, and the way within that bin incrementally.
+ */
+static inline int sja1105et_fdb_index(int bin, int way)
+{
+ return bin * SJA1105ET_FDB_BIN_SIZE + way;
+}
+
+static int sja1105_is_fdb_entry_in_bin(struct sja1105_private *priv, int bin,
+ const u8 *addr, u16 vid,
+ struct sja1105_l2_lookup_entry *match,
+ int *last_unused)
+{
+ int way;
+
+ for (way = 0; way < SJA1105ET_FDB_BIN_SIZE; way++) {
+ struct sja1105_l2_lookup_entry l2_lookup = {0};
+ int index = sja1105et_fdb_index(bin, way);
+
+ /* Skip unused entries, optionally marking them
+ * into the return value
+ */
+ if (sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
+ index, &l2_lookup)) {
+ if (last_unused)
+ *last_unused = way;
+ continue;
+ }
+
+ if (l2_lookup.macaddr == ether_addr_to_u64(addr) &&
+ l2_lookup.vlanid == vid) {
+ if (match)
+ *match = l2_lookup;
+ return way;
+ }
+ }
+ /* Return an invalid entry index if not found */
+ return -1;
+}
+
+static int sja1105_fdb_add(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid)
+{
+ struct sja1105_l2_lookup_entry l2_lookup = {0};
+ struct sja1105_private *priv = ds->priv;
+ struct device *dev = ds->dev;
+ int last_unused = -1;
+ int bin, way;
+
+ bin = sja1105_fdb_hash(priv, addr, vid);
+
+ way = sja1105_is_fdb_entry_in_bin(priv, bin, addr, vid,
+ &l2_lookup, &last_unused);
+ if (way >= 0) {
+ /* We have an FDB entry. Is our port in the destination
+ * mask? If yes, we need to do nothing. If not, we need
+ * to rewrite the entry by adding this port to it.
+ */
+ if (l2_lookup.destports & BIT(port))
+ return 0;
+ l2_lookup.destports |= BIT(port);
+ } else {
+ int index = sja1105et_fdb_index(bin, way);
+
+ /* We don't have an FDB entry. We construct a new one and
+ * try to find a place for it within the FDB table.
+ */
+ l2_lookup.macaddr = ether_addr_to_u64(addr);
+ l2_lookup.destports = BIT(port);
+ l2_lookup.vlanid = vid;
+
+ if (last_unused >= 0) {
+ way = last_unused;
+ } else {
+ /* Bin is full, need to evict somebody.
+ * Choose victim at random. If you get these messages
+ * often, you may need to consider changing the
+ * distribution function:
+ * static_config[BLK_IDX_L2_LOOKUP_PARAMS].entries->poly
+ */
+ get_random_bytes(&way, sizeof(u8));
+ way %= SJA1105ET_FDB_BIN_SIZE;
+ dev_warn(dev, "Warning, FDB bin %d full while adding entry for %pM. Evicting entry %u.\n",
+ bin, addr, way);
+ /* Evict entry */
+ sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
+ index, NULL, false);
+ }
+ }
+ l2_lookup.index = sja1105et_fdb_index(bin, way);
+
+ return sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
+ l2_lookup.index, &l2_lookup,
+ true);
+}
+
+static int sja1105_fdb_del(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid)
+{
+ struct sja1105_l2_lookup_entry l2_lookup = {0};
+ struct sja1105_private *priv = ds->priv;
+ int index, bin, way;
+ bool keep;
+
+ bin = sja1105_fdb_hash(priv, addr, vid);
+ way = sja1105_is_fdb_entry_in_bin(priv, bin, addr, vid,
+ &l2_lookup, NULL);
+ if (way < 0)
+ return 0;
+ index = sja1105et_fdb_index(bin, way);
+
+ /* We have an FDB entry. Is our port in the destination mask? If yes,
+ * we need to remove it. If the resulting port mask becomes empty, we
+ * need to completely evict the FDB entry.
+ * Otherwise we just write it back.
+ */
+ if (l2_lookup.destports & BIT(port))
+ l2_lookup.destports &= ~BIT(port);
+ if (l2_lookup.destports)
+ keep = true;
+ else
+ keep = false;
+
+ return sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
+ index, &l2_lookup, keep);
+}
+
+static int sja1105_fdb_dump(struct dsa_switch *ds, int port,
+ dsa_fdb_dump_cb_t *cb, void *data)
+{
+ struct sja1105_private *priv = ds->priv;
+ struct device *dev = ds->dev;
+ int i;
+
+ for (i = 0; i < SJA1105_MAX_L2_LOOKUP_COUNT; i++) {
+ struct sja1105_l2_lookup_entry l2_lookup = {0};
+ u8 macaddr[ETH_ALEN];
+ int rc;
+
+ rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
+ i, &l2_lookup);
+ /* No fdb entry at i, not an issue */
+ if (rc == -EINVAL)
+ continue;
+ if (rc) {
+ dev_err(dev, "Failed to dump FDB: %d\n", rc);
+ return rc;
+ }
+
+ /* FDB dump callback is per port. This means we have to
+ * disregard a valid entry if it's not for this port, even if
+ * only to revisit it later. This is inefficient because the
+ * 1024-sized FDB table needs to be traversed 4 times through
+ * SPI during a 'bridge fdb show' command.
+ */
+ if (!(l2_lookup.destports & BIT(port)))
+ continue;
+ u64_to_ether_addr(l2_lookup.macaddr, macaddr);
+ cb(macaddr, l2_lookup.vlanid, false, data);
+ }
+ return 0;
+}
+
+/* This callback needs to be present */
+static int sja1105_mdb_prepare(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ return 0;
+}
+
+static void sja1105_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ sja1105_fdb_add(ds, port, mdb->addr, mdb->vid);
+}
+
+static int sja1105_mdb_del(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ return sja1105_fdb_del(ds, port, mdb->addr, mdb->vid);
+}
+
+static int sja1105_bridge_member(struct dsa_switch *ds, int port,
+ struct net_device *br, bool member)
+{
+ struct sja1105_l2_forwarding_entry *l2_fwd;
+ struct sja1105_private *priv = ds->priv;
+ int i, rc;
+
+ l2_fwd = priv->static_config.tables[BLK_IDX_L2_FORWARDING].entries;
+
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ /* Add this port to the forwarding matrix of the
+ * other ports in the same bridge, and viceversa.
+ */
+ if (!dsa_is_user_port(ds, i))
+ continue;
+ /* For the ports already under the bridge, only one thing needs
+ * to be done, and that is to add this port to their
+ * reachability domain. So we can perform the SPI write for
+ * them immediately. However, for this port itself (the one
+ * that is new to the bridge), we need to add all other ports
+ * to its reachability domain. So we do that incrementally in
+ * this loop, and perform the SPI write only at the end, once
+ * the domain contains all other bridge ports.
+ */
+ if (i == port)
+ continue;
+ if (dsa_to_port(ds, i)->bridge_dev != br)
+ continue;
+ sja1105_port_allow_traffic(l2_fwd, i, port, member);
+ sja1105_port_allow_traffic(l2_fwd, port, i, member);
+
+ rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_FORWARDING,
+ i, &l2_fwd[i], true);
+ if (rc < 0)
+ return rc;
+ }
+
+ return sja1105_dynamic_config_write(priv, BLK_IDX_L2_FORWARDING,
+ port, &l2_fwd[port], true);
+}
+
+static void sja1105_bridge_stp_state_set(struct dsa_switch *ds, int port,
+ u8 state)
+{
+ struct sja1105_private *priv = ds->priv;
+ struct sja1105_mac_config_entry *mac;
+
+ mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
+
+ switch (state) {
+ case BR_STATE_DISABLED:
+ case BR_STATE_BLOCKING:
+ /* From UM10944 description of DRPDTAG (why put this there?):
+ * "Management traffic flows to the port regardless of the state
+ * of the INGRESS flag". So BPDUs are still be allowed to pass.
+ * At the moment no difference between DISABLED and BLOCKING.
+ */
+ mac[port].ingress = false;
+ mac[port].egress = false;
+ mac[port].dyn_learn = false;
+ break;
+ case BR_STATE_LISTENING:
+ mac[port].ingress = true;
+ mac[port].egress = false;
+ mac[port].dyn_learn = false;
+ break;
+ case BR_STATE_LEARNING:
+ mac[port].ingress = true;
+ mac[port].egress = false;
+ mac[port].dyn_learn = true;
+ break;
+ case BR_STATE_FORWARDING:
+ mac[port].ingress = true;
+ mac[port].egress = true;
+ mac[port].dyn_learn = true;
+ break;
+ default:
+ dev_err(ds->dev, "invalid STP state: %d\n", state);
+ return;
+ }
+
+ sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
+ &mac[port], true);
+}
+
+static int sja1105_bridge_join(struct dsa_switch *ds, int port,
+ struct net_device *br)
+{
+ return sja1105_bridge_member(ds, port, br, true);
+}
+
+static void sja1105_bridge_leave(struct dsa_switch *ds, int port,
+ struct net_device *br)
+{
+ sja1105_bridge_member(ds, port, br, false);
+}
+
+static u8 sja1105_stp_state_get(struct sja1105_private *priv, int port)
+{
+ struct sja1105_mac_config_entry *mac;
+
+ mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
+
+ if (!mac[port].ingress && !mac[port].egress && !mac[port].dyn_learn)
+ return BR_STATE_BLOCKING;
+ if (mac[port].ingress && !mac[port].egress && !mac[port].dyn_learn)
+ return BR_STATE_LISTENING;
+ if (mac[port].ingress && !mac[port].egress && mac[port].dyn_learn)
+ return BR_STATE_LEARNING;
+ if (mac[port].ingress && mac[port].egress && mac[port].dyn_learn)
+ return BR_STATE_FORWARDING;
+ return -EINVAL;
+}
+
+/* For situations where we need to change a setting at runtime that is only
+ * available through the static configuration, resetting the switch in order
+ * to upload the new static config is unavoidable. Back up the settings we
+ * modify at runtime (currently only MAC) and restore them after uploading,
+ * such that this operation is relatively seamless.
+ */
+static int sja1105_static_config_reload(struct sja1105_private *priv)
+{
+ struct sja1105_mac_config_entry *mac;
+ int speed_mbps[SJA1105_NUM_PORTS];
+ u8 stp_state[SJA1105_NUM_PORTS];
+ int rc, i;
+
+ mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
+
+ /* Back up settings changed by sja1105_adjust_port_config and
+ * sja1105_bridge_stp_state_set and restore their defaults.
+ */
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ speed_mbps[i] = sja1105_speed[mac[i].speed];
+ mac[i].speed = SJA1105_SPEED_AUTO;
+ if (i == dsa_upstream_port(priv->ds, i)) {
+ mac[i].ingress = true;
+ mac[i].egress = true;
+ mac[i].dyn_learn = true;
+ } else {
+ stp_state[i] = sja1105_stp_state_get(priv, i);
+ mac[i].ingress = false;
+ mac[i].egress = false;
+ mac[i].dyn_learn = false;
+ }
+ }
+
+ /* Reset switch and send updated static configuration */
+ rc = sja1105_static_config_upload(priv);
+ if (rc < 0)
+ goto out;
+
+ /* Configure the CGU (PLLs) for MII and RMII PHYs.
+ * For these interfaces there is no dynamic configuration
+ * needed, since PLLs have same settings at all speeds.
+ */
+ rc = sja1105_clocking_setup(priv);
+ if (rc < 0)
+ goto out;
+
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ bool enabled = (speed_mbps[i] != 0);
+
+ if (i != dsa_upstream_port(priv->ds, i))
+ sja1105_bridge_stp_state_set(priv->ds, i, stp_state[i]);
+
+ rc = sja1105_adjust_port_config(priv, i, speed_mbps[i],
+ enabled);
+ if (rc < 0)
+ goto out;
+ }
+out:
+ return rc;
+}
+
+/* The TPID setting belongs to the General Parameters table,
+ * which can only be partially reconfigured at runtime (and not the TPID).
+ * So a switch reset is required.
+ */
+static int sja1105_change_tpid(struct sja1105_private *priv,
+ u16 tpid, u16 tpid2)
+{
+ struct sja1105_general_params_entry *general_params;
+ struct sja1105_table *table;
+
+ table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
+ general_params = table->entries;
+ general_params->tpid = tpid;
+ general_params->tpid2 = tpid2;
+ return sja1105_static_config_reload(priv);
+}
+
+static int sja1105_pvid_apply(struct sja1105_private *priv, int port, u16 pvid)
+{
+ struct sja1105_mac_config_entry *mac;
+
+ mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
+
+ mac[port].vlanid = pvid;
+
+ return sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
+ &mac[port], true);
+}
+
+static int sja1105_is_vlan_configured(struct sja1105_private *priv, u16 vid)
+{
+ struct sja1105_vlan_lookup_entry *vlan;
+ int count, i;
+
+ vlan = priv->static_config.tables[BLK_IDX_VLAN_LOOKUP].entries;
+ count = priv->static_config.tables[BLK_IDX_VLAN_LOOKUP].entry_count;
+
+ for (i = 0; i < count; i++)
+ if (vlan[i].vlanid == vid)
+ return i;
+
+ /* Return an invalid entry index if not found */
+ return -1;
+}
+
+static int sja1105_vlan_apply(struct sja1105_private *priv, int port, u16 vid,
+ bool enabled, bool untagged)
+{
+ struct sja1105_vlan_lookup_entry *vlan;
+ struct sja1105_table *table;
+ bool keep = true;
+ int match, rc;
+
+ table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
+
+ match = sja1105_is_vlan_configured(priv, vid);
+ if (match < 0) {
+ /* Can't delete a missing entry. */
+ if (!enabled)
+ return 0;
+ rc = sja1105_table_resize(table, table->entry_count + 1);
+ if (rc)
+ return rc;
+ match = table->entry_count - 1;
+ }
+ /* Assign pointer after the resize (it's new memory) */
+ vlan = table->entries;
+ vlan[match].vlanid = vid;
+ if (enabled) {
+ vlan[match].vlan_bc |= BIT(port);
+ vlan[match].vmemb_port |= BIT(port);
+ } else {
+ vlan[match].vlan_bc &= ~BIT(port);
+ vlan[match].vmemb_port &= ~BIT(port);
+ }
+ /* Also unset tag_port if removing this VLAN was requested,
+ * just so we don't have a confusing bitmap (no practical purpose).
+ */
+ if (untagged || !enabled)
+ vlan[match].tag_port &= ~BIT(port);
+ else
+ vlan[match].tag_port |= BIT(port);
+ /* If there's no port left as member of this VLAN,
+ * it's time for it to go.
+ */
+ if (!vlan[match].vmemb_port)
+ keep = false;
+
+ dev_dbg(priv->ds->dev,
+ "%s: port %d, vid %llu, broadcast domain 0x%llx, "
+ "port members 0x%llx, tagged ports 0x%llx, keep %d\n",
+ __func__, port, vlan[match].vlanid, vlan[match].vlan_bc,
+ vlan[match].vmemb_port, vlan[match].tag_port, keep);
+
+ rc = sja1105_dynamic_config_write(priv, BLK_IDX_VLAN_LOOKUP, vid,
+ &vlan[match], keep);
+ if (rc < 0)
+ return rc;
+
+ if (!keep)
+ return sja1105_table_delete_entry(table, match);
+
+ return 0;
+}
+
+static int sja1105_setup_8021q_tagging(struct dsa_switch *ds, bool enabled)
+{
+ int rc, i;
+
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ rc = dsa_port_setup_8021q_tagging(ds, i, enabled);
+ if (rc < 0) {
+ dev_err(ds->dev, "Failed to setup VLAN tagging for port %d: %d\n",
+ i, rc);
+ return rc;
+ }
+ }
+ dev_info(ds->dev, "%s switch tagging\n",
+ enabled ? "Enabled" : "Disabled");
+ return 0;
+}
+
+static enum dsa_tag_protocol
+sja1105_get_tag_protocol(struct dsa_switch *ds, int port)
+{
+ return DSA_TAG_PROTO_SJA1105;
+}
+
+/* This callback needs to be present */
+static int sja1105_vlan_prepare(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_vlan *vlan)
+{
+ return 0;
+}
+
+static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
+{
+ struct sja1105_private *priv = ds->priv;
+ int rc;
+
+ if (enabled)
+ /* Enable VLAN filtering. */
+ rc = sja1105_change_tpid(priv, ETH_P_8021Q, ETH_P_8021AD);
+ else
+ /* Disable VLAN filtering. */
+ rc = sja1105_change_tpid(priv, ETH_P_SJA1105, ETH_P_SJA1105);
+ if (rc)
+ dev_err(ds->dev, "Failed to change VLAN Ethertype\n");
+
+ /* Switch port identification based on 802.1Q is only passable
+ * if we are not under a vlan_filtering bridge. So make sure
+ * the two configurations are mutually exclusive.
+ */
+ return sja1105_setup_8021q_tagging(ds, !enabled);
+}
+
+static void sja1105_vlan_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_vlan *vlan)
+{
+ struct sja1105_private *priv = ds->priv;
+ u16 vid;
+ int rc;
+
+ for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
+ rc = sja1105_vlan_apply(priv, port, vid, true, vlan->flags &
+ BRIDGE_VLAN_INFO_UNTAGGED);
+ if (rc < 0) {
+ dev_err(ds->dev, "Failed to add VLAN %d to port %d: %d\n",
+ vid, port, rc);
+ return;
+ }
+ if (vlan->flags & BRIDGE_VLAN_INFO_PVID) {
+ rc = sja1105_pvid_apply(ds->priv, port, vid);
+ if (rc < 0) {
+ dev_err(ds->dev, "Failed to set pvid %d on port %d: %d\n",
+ vid, port, rc);
+ return;
+ }
+ }
+ }
+}
+
+static int sja1105_vlan_del(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_vlan *vlan)
+{
+ struct sja1105_private *priv = ds->priv;
+ u16 vid;
+ int rc;
+
+ for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
+ rc = sja1105_vlan_apply(priv, port, vid, false, vlan->flags &
+ BRIDGE_VLAN_INFO_UNTAGGED);
+ if (rc < 0) {
+ dev_err(ds->dev, "Failed to remove VLAN %d from port %d: %d\n",
+ vid, port, rc);
+ return rc;
+ }
+ }
+ return 0;
+}
+
+/* The programming model for the SJA1105 switch is "all-at-once" via static
+ * configuration tables. Some of these can be dynamically modified at runtime,
+ * but not the xMII mode parameters table.
+ * Furthermode, some PHYs may not have crystals for generating their clocks
+ * (e.g. RMII). Instead, their 50MHz clock is supplied via the SJA1105 port's
+ * ref_clk pin. So port clocking needs to be initialized early, before
+ * connecting to PHYs is attempted, otherwise they won't respond through MDIO.
+ * Setting correct PHY link speed does not matter now.
+ * But dsa_slave_phy_setup is called later than sja1105_setup, so the PHY
+ * bindings are not yet parsed by DSA core. We need to parse early so that we
+ * can populate the xMII mode parameters table.
+ */
+static int sja1105_setup(struct dsa_switch *ds)
+{
+ struct sja1105_dt_port ports[SJA1105_NUM_PORTS];
+ struct sja1105_private *priv = ds->priv;
+ int rc;
+
+ rc = sja1105_parse_dt(priv, ports);
+ if (rc < 0) {
+ dev_err(ds->dev, "Failed to parse DT: %d\n", rc);
+ return rc;
+ }
+
+ /* Error out early if internal delays are required through DT
+ * and we can't apply them.
+ */
+ rc = sja1105_parse_rgmii_delays(priv, ports);
+ if (rc < 0) {
+ dev_err(ds->dev, "RGMII delay not supported\n");
+ return rc;
+ }
+
+ /* Create and send configuration down to device */
+ rc = sja1105_static_config_load(priv, ports);
+ if (rc < 0) {
+ dev_err(ds->dev, "Failed to load static config: %d\n", rc);
+ return rc;
+ }
+ /* Configure the CGU (PHY link modes and speeds) */
+ rc = sja1105_clocking_setup(priv);
+ if (rc < 0) {
+ dev_err(ds->dev, "Failed to configure MII clocking: %d\n", rc);
+ return rc;
+ }
+ /* On SJA1105, VLAN filtering per se is always enabled in hardware.
+ * The only thing we can do to disable it is lie about what the 802.1Q
+ * EtherType is.
+ * So it will still try to apply VLAN filtering, but all ingress
+ * traffic (except frames received with EtherType of ETH_P_SJA1105)
+ * will be internally tagged with a distorted VLAN header where the
+ * TPID is ETH_P_SJA1105, and the VLAN ID is the port pvid.
+ */
+ ds->vlan_filtering_is_global = true;
+
+ /* The DSA/switchdev model brings up switch ports in standalone mode by
+ * default, and that means vlan_filtering is 0 since they're not under
+ * a bridge, so it's safe to set up switch tagging at this time.
+ */
+ return sja1105_setup_8021q_tagging(ds, true);
+}
+
+static int sja1105_mgmt_xmit(struct dsa_switch *ds, int port, int slot,
+ struct sk_buff *skb)
+{
+ struct sja1105_mgmt_entry mgmt_route = {0};
+ struct sja1105_private *priv = ds->priv;
+ struct ethhdr *hdr;
+ int timeout = 10;
+ int rc;
+
+ hdr = eth_hdr(skb);
+
+ mgmt_route.macaddr = ether_addr_to_u64(hdr->h_dest);
+ mgmt_route.destports = BIT(port);
+ mgmt_route.enfport = 1;
+
+ rc = sja1105_dynamic_config_write(priv, BLK_IDX_MGMT_ROUTE,
+ slot, &mgmt_route, true);
+ if (rc < 0) {
+ kfree_skb(skb);
+ return rc;
+ }
+
+ /* Transfer skb to the host port. */
+ dsa_enqueue_skb(skb, ds->ports[port].slave);
+
+ /* Wait until the switch has processed the frame */
+ do {
+ rc = sja1105_dynamic_config_read(priv, BLK_IDX_MGMT_ROUTE,
+ slot, &mgmt_route);
+ if (rc < 0) {
+ dev_err_ratelimited(priv->ds->dev,
+ "failed to poll for mgmt route\n");
+ continue;
+ }
+
+ /* UM10944: The ENFPORT flag of the respective entry is
+ * cleared when a match is found. The host can use this
+ * flag as an acknowledgment.
+ */
+ cpu_relax();
+ } while (mgmt_route.enfport && --timeout);
+
+ if (!timeout) {
+ /* Clean up the management route so that a follow-up
+ * frame may not match on it by mistake.
+ */
+ sja1105_dynamic_config_write(priv, BLK_IDX_MGMT_ROUTE,
+ slot, &mgmt_route, false);
+ dev_err_ratelimited(priv->ds->dev, "xmit timed out\n");
+ }
+
+ return NETDEV_TX_OK;
+}
+
+/* Deferred work is unfortunately necessary because setting up the management
+ * route cannot be done from atomit context (SPI transfer takes a sleepable
+ * lock on the bus)
+ */
+static netdev_tx_t sja1105_port_deferred_xmit(struct dsa_switch *ds, int port,
+ struct sk_buff *skb)
+{
+ struct sja1105_private *priv = ds->priv;
+ struct sja1105_port *sp = &priv->ports[port];
+ int slot = sp->mgmt_slot;
+
+ /* The tragic fact about the switch having 4x2 slots for installing
+ * management routes is that all of them except one are actually
+ * useless.
+ * If 2 slots are simultaneously configured for two BPDUs sent to the
+ * same (multicast) DMAC but on different egress ports, the switch
+ * would confuse them and redirect first frame it receives on the CPU
+ * port towards the port configured on the numerically first slot
+ * (therefore wrong port), then second received frame on second slot
+ * (also wrong port).
+ * So for all practical purposes, there needs to be a lock that
+ * prevents that from happening. The slot used here is utterly useless
+ * (could have simply been 0 just as fine), but we are doing it
+ * nonetheless, in case a smarter idea ever comes up in the future.
+ */
+ mutex_lock(&priv->mgmt_lock);
+
+ sja1105_mgmt_xmit(ds, port, slot, skb);
+
+ mutex_unlock(&priv->mgmt_lock);
+ return NETDEV_TX_OK;
+}
+
+/* The MAXAGE setting belongs to the L2 Forwarding Parameters table,
+ * which cannot be reconfigured at runtime. So a switch reset is required.
+ */
+static int sja1105_set_ageing_time(struct dsa_switch *ds,
+ unsigned int ageing_time)
+{
+ struct sja1105_l2_lookup_params_entry *l2_lookup_params;
+ struct sja1105_private *priv = ds->priv;
+ struct sja1105_table *table;
+ unsigned int maxage;
+
+ table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS];
+ l2_lookup_params = table->entries;
+
+ maxage = SJA1105_AGEING_TIME_MS(ageing_time);
+
+ if (l2_lookup_params->maxage == maxage)
+ return 0;
+
+ l2_lookup_params->maxage = maxage;
+
+ return sja1105_static_config_reload(priv);
+}
+
+static const struct dsa_switch_ops sja1105_switch_ops = {
+ .get_tag_protocol = sja1105_get_tag_protocol,
+ .setup = sja1105_setup,
+ .adjust_link = sja1105_adjust_link,
+ .set_ageing_time = sja1105_set_ageing_time,
+ .phylink_validate = sja1105_phylink_validate,
+ .get_strings = sja1105_get_strings,
+ .get_ethtool_stats = sja1105_get_ethtool_stats,
+ .get_sset_count = sja1105_get_sset_count,
+ .port_fdb_dump = sja1105_fdb_dump,
+ .port_fdb_add = sja1105_fdb_add,
+ .port_fdb_del = sja1105_fdb_del,
+ .port_bridge_join = sja1105_bridge_join,
+ .port_bridge_leave = sja1105_bridge_leave,
+ .port_stp_state_set = sja1105_bridge_stp_state_set,
+ .port_vlan_prepare = sja1105_vlan_prepare,
+ .port_vlan_filtering = sja1105_vlan_filtering,
+ .port_vlan_add = sja1105_vlan_add,
+ .port_vlan_del = sja1105_vlan_del,
+ .port_mdb_prepare = sja1105_mdb_prepare,
+ .port_mdb_add = sja1105_mdb_add,
+ .port_mdb_del = sja1105_mdb_del,
+ .port_deferred_xmit = sja1105_port_deferred_xmit,
+};
+
+static int sja1105_check_device_id(struct sja1105_private *priv)
+{
+ const struct sja1105_regs *regs = priv->info->regs;
+ u8 prod_id[SJA1105_SIZE_DEVICE_ID] = {0};
+ struct device *dev = &priv->spidev->dev;
+ u64 device_id;
+ u64 part_no;
+ int rc;
+
+ rc = sja1105_spi_send_int(priv, SPI_READ, regs->device_id,
+ &device_id, SJA1105_SIZE_DEVICE_ID);
+ if (rc < 0)
+ return rc;
+
+ if (device_id != priv->info->device_id) {
+ dev_err(dev, "Expected device ID 0x%llx but read 0x%llx\n",
+ priv->info->device_id, device_id);
+ return -ENODEV;
+ }
+
+ rc = sja1105_spi_send_packed_buf(priv, SPI_READ, regs->prod_id,
+ prod_id, SJA1105_SIZE_DEVICE_ID);
+ if (rc < 0)
+ return rc;
+
+ sja1105_unpack(prod_id, &part_no, 19, 4, SJA1105_SIZE_DEVICE_ID);
+
+ if (part_no != priv->info->part_no) {
+ dev_err(dev, "Expected part number 0x%llx but read 0x%llx\n",
+ priv->info->part_no, part_no);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int sja1105_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct sja1105_private *priv;
+ struct dsa_switch *ds;
+ int rc, i;
+
+ if (!dev->of_node) {
+ dev_err(dev, "No DTS bindings for SJA1105 driver\n");
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(dev, sizeof(struct sja1105_private), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ /* Configure the optional reset pin and bring up switch */
+ priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->reset_gpio))
+ dev_dbg(dev, "reset-gpios not defined, ignoring\n");
+ else
+ sja1105_hw_reset(priv->reset_gpio, 1, 1);
+
+ /* Populate our driver private structure (priv) based on
+ * the device tree node that was probed (spi)
+ */
+ priv->spidev = spi;
+ spi_set_drvdata(spi, priv);
+
+ /* Configure the SPI bus */
+ spi->bits_per_word = 8;
+ rc = spi_setup(spi);
+ if (rc < 0) {
+ dev_err(dev, "Could not init SPI\n");
+ return rc;
+ }
+
+ priv->info = of_device_get_match_data(dev);
+
+ /* Detect hardware device */
+ rc = sja1105_check_device_id(priv);
+ if (rc < 0) {
+ dev_err(dev, "Device ID check failed: %d\n", rc);
+ return rc;
+ }
+
+ dev_info(dev, "Probed switch chip: %s\n", priv->info->name);
+
+ ds = dsa_switch_alloc(dev, SJA1105_NUM_PORTS);
+ if (!ds)
+ return -ENOMEM;
+
+ ds->ops = &sja1105_switch_ops;
+ ds->priv = priv;
+ priv->ds = ds;
+
+ /* Connections between dsa_port and sja1105_port */
+ for (i = 0; i < SJA1105_NUM_PORTS; i++) {
+ struct sja1105_port *sp = &priv->ports[i];
+
+ ds->ports[i].priv = sp;
+ sp->dp = &ds->ports[i];
+ }
+ mutex_init(&priv->mgmt_lock);
+
+ return dsa_register_switch(priv->ds);
+}
+
+static int sja1105_remove(struct spi_device *spi)
+{
+ struct sja1105_private *priv = spi_get_drvdata(spi);
+
+ dsa_unregister_switch(priv->ds);
+ sja1105_static_config_free(&priv->static_config);
+ return 0;
+}
+
+static const struct of_device_id sja1105_dt_ids[] = {
+ { .compatible = "nxp,sja1105e", .data = &sja1105e_info },
+ { .compatible = "nxp,sja1105t", .data = &sja1105t_info },
+ { .compatible = "nxp,sja1105p", .data = &sja1105p_info },
+ { .compatible = "nxp,sja1105q", .data = &sja1105q_info },
+ { .compatible = "nxp,sja1105r", .data = &sja1105r_info },
+ { .compatible = "nxp,sja1105s", .data = &sja1105s_info },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sja1105_dt_ids);
+
+static struct spi_driver sja1105_driver = {
+ .driver = {
+ .name = "sja1105",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(sja1105_dt_ids),
+ },
+ .probe = sja1105_probe,
+ .remove = sja1105_remove,
+};
+
+module_spi_driver(sja1105_driver);
+
+MODULE_AUTHOR("Vladimir Oltean <olteanv@gmail.com>");
+MODULE_AUTHOR("Georg Waibel <georg.waibel@sensor-technik.de>");
+MODULE_DESCRIPTION("SJA1105 Driver");
+MODULE_LICENSE("GPL v2");