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linux/drivers/net/dsa/sja1105/sja1105_main.c

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// 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"
#include "sja1105_sgmii.h"
#include "sja1105_tas.h"
static const struct dsa_switch_ops sja1105_switch_ops;
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
* adjusted at runtime by PHYLINK.
*/
.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 = 1,
.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;
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 bool sja1105_supports_sgmii(struct sja1105_private *priv, int port)
{
if (priv->info->part_no != SJA1105R_PART_NO &&
priv->info->part_no != SJA1105S_PART_NO)
return false;
if (port != SJA1105_SGMII_PORT)
return false;
if (dsa_is_unused_port(priv->ds, port))
return false;
return true;
}
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 PHYLINK DT bindings */
table->entry_count = SJA1105_MAX_XMII_PARAMS_COUNT;
mii = table->entries;
for (i = 0; i < SJA1105_NUM_PORTS; i++) {
if (dsa_is_unused_port(priv->ds, i))
continue;
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;
case PHY_INTERFACE_MODE_SGMII:
if (!sja1105_supports_sgmii(priv, i))
return -EINVAL;
mii->xmii_mode[i] = XMII_MODE_SGMII;
break;
default:
dev_err(dev, "Unsupported PHY mode %s!\n",
phy_modes(ports[i].phy_mode));
}
/* Even though the SerDes port is able to drive SGMII autoneg
* like a PHY would, from the perspective of the XMII tables,
* the SGMII port should always be put in MAC mode.
*/
if (ports[i].phy_mode == PHY_INTERFACE_MODE_SGMII)
mii->phy_mac[i] = XMII_MAC;
else
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;
u64 max_fdb_entries = SJA1105_MAX_L2_LOOKUP_COUNT / SJA1105_NUM_PORTS;
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,
/* And the P/Q/R/S equivalent setting: */
.start_dynspc = 0,
.maxaddrp = {max_fdb_entries, max_fdb_entries, max_fdb_entries,
max_fdb_entries, max_fdb_entries, },
/* 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 = true,
/* 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,
/* P/Q/R/S only */
.use_static = true,
/* Dynamically learned FDB entries can overwrite other (older)
* dynamic FDB entries
*/
.owr_dyn = true,
.drpnolearn = 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 = 1,
};
struct dsa_switch *ds = priv->ds;
int port;
table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
/* The static VLAN table will only contain the initial pvid of 1.
* All other VLANs are to be configured through dynamic entries,
* and kept in the static configuration table as backing memory.
*/
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 1: all DT-defined ports are members; no restrictions on
* forwarding; always transmit as untagged.
*/
for (port = 0; port < ds->num_ports; port++) {
struct sja1105_bridge_vlan *v;
if (dsa_is_unused_port(ds, port))
continue;
pvid.vmemb_port |= BIT(port);
pvid.vlan_bc |= BIT(port);
pvid.tag_port &= ~BIT(port);
/* Let traffic that don't need dsa_8021q (e.g. STP, PTP) be
* transmitted as untagged.
*/
v = kzalloc(sizeof(*v), GFP_KERNEL);
if (!v)
return -ENOMEM;
v->port = port;
v->vid = 1;
v->untagged = true;
if (dsa_is_cpu_port(ds, port))
v->pvid = true;
list_add(&v->list, &priv->dsa_8021q_vlans);
}
((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;
}
void sja1105_frame_memory_partitioning(struct sja1105_private *priv)
{
struct sja1105_l2_forwarding_params_entry *l2_fwd_params;
struct sja1105_vl_forwarding_params_entry *vl_fwd_params;
struct sja1105_table *table;
int max_mem;
/* VLAN retagging is implemented using a loopback port that consumes
* frame buffers. That leaves less for us.
*/
if (priv->vlan_state == SJA1105_VLAN_BEST_EFFORT)
max_mem = SJA1105_MAX_FRAME_MEMORY_RETAGGING;
else
max_mem = SJA1105_MAX_FRAME_MEMORY;
table = &priv->static_config.tables[BLK_IDX_L2_FORWARDING_PARAMS];
l2_fwd_params = table->entries;
l2_fwd_params->part_spc[0] = max_mem;
/* If we have any critical-traffic virtual links, we need to reserve
* some frame buffer memory for them. At the moment, hardcode the value
* at 100 blocks of 128 bytes of memory each. This leaves 829 blocks
* remaining for best-effort traffic. TODO: figure out a more flexible
* way to perform the frame buffer partitioning.
*/
if (!priv->static_config.tables[BLK_IDX_VL_FORWARDING].entry_count)
return;
table = &priv->static_config.tables[BLK_IDX_VL_FORWARDING_PARAMS];
vl_fwd_params = table->entries;
l2_fwd_params->part_spc[0] -= SJA1105_VL_FRAME_MEMORY;
vl_fwd_params->partspc[0] = SJA1105_VL_FRAME_MEMORY;
}
static int sja1105_init_general_params(struct sja1105_private *priv)
{
struct sja1105_general_params_entry default_general_params = {
/* Allow dynamic changing of the mirror port */
.mirr_ptacu = true,
.switchid = priv->ds->index,
/* Priority queue for link-local management frames
* (both ingress to and egress from CPU - PTP, STP etc)
*/
.hostprio = 7,
.mac_fltres1 = SJA1105_LINKLOCAL_FILTER_A,
.mac_flt1 = SJA1105_LINKLOCAL_FILTER_A_MASK,
.incl_srcpt1 = false,
.send_meta1 = false,
.mac_fltres0 = SJA1105_LINKLOCAL_FILTER_B,
.mac_flt0 = SJA1105_LINKLOCAL_FILTER_B_MASK,
.incl_srcpt0 = false,
.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),
/* Default to an invalid value */
.mirr_port = SJA1105_NUM_PORTS,
/* 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 = SJA1105_VL_FORMAT_PSFP,
.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;
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;
}
static int sja1105_init_avb_params(struct sja1105_private *priv)
{
struct sja1105_avb_params_entry *avb;
struct sja1105_table *table;
table = &priv->static_config.tables[BLK_IDX_AVB_PARAMS];
/* Discard previous AVB Parameters Table */
if (table->entry_count) {
kfree(table->entries);
table->entry_count = 0;
}
table->entries = kcalloc(SJA1105_MAX_AVB_PARAMS_COUNT,
table->ops->unpacked_entry_size, GFP_KERNEL);
if (!table->entries)
return -ENOMEM;
table->entry_count = SJA1105_MAX_AVB_PARAMS_COUNT;
avb = table->entries;
/* Configure the MAC addresses for meta frames */
avb->destmeta = SJA1105_META_DMAC;
avb->srcmeta = SJA1105_META_SMAC;
/* On P/Q/R/S, configure the direction of the PTP_CLK pin as input by
* default. This is because there might be boards with a hardware
* layout where enabling the pin as output might cause an electrical
* clash. On E/T the pin is always an output, which the board designers
* probably already knew, so even if there are going to be electrical
* issues, there's nothing we can do.
*/
avb->cas_master = false;
return 0;
}
/* The L2 policing table is 2-stage. The table is looked up for each frame
* according to the ingress port, whether it was broadcast or not, and the
* classified traffic class (given by VLAN PCP). This portion of the lookup is
* fixed, and gives access to the SHARINDX, an indirection register pointing
* within the policing table itself, which is used to resolve the policer that
* will be used for this frame.
*
* Stage 1 Stage 2
* +------------+--------+ +---------------------------------+
* |Port 0 TC 0 |SHARINDX| | Policer 0: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 0 TC 1 |SHARINDX| | Policer 1: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* ... | Policer 2: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 0 TC 7 |SHARINDX| | Policer 3: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 1 TC 0 |SHARINDX| | Policer 4: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* ... | Policer 5: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 1 TC 7 |SHARINDX| | Policer 6: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* ... | Policer 7: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 4 TC 7 |SHARINDX| ...
* +------------+--------+
* |Port 0 BCAST|SHARINDX| ...
* +------------+--------+
* |Port 1 BCAST|SHARINDX| ...
* +------------+--------+
* ... ...
* +------------+--------+ +---------------------------------+
* |Port 4 BCAST|SHARINDX| | Policer 44: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
*
* In this driver, we shall use policers 0-4 as statically alocated port
* (matchall) policers. So we need to make the SHARINDX for all lookups
* corresponding to this ingress port (8 VLAN PCP lookups and 1 broadcast
* lookup) equal.
* The remaining policers (40) shall be dynamically allocated for flower
* policers, where the key is either vlan_prio or dst_mac ff:ff:ff:ff:ff:ff.
*/
#define SJA1105_RATE_MBPS(speed) (((speed) * 64000) / 1000)
static int sja1105_init_l2_policing(struct sja1105_private *priv)
{
struct sja1105_l2_policing_entry *policing;
struct sja1105_table *table;
int port, tc;
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;
/* Setup shared indices for the matchall policers */
for (port = 0; port < SJA1105_NUM_PORTS; port++) {
int bcast = (SJA1105_NUM_PORTS * SJA1105_NUM_TC) + port;
for (tc = 0; tc < SJA1105_NUM_TC; tc++)
policing[port * SJA1105_NUM_TC + tc].sharindx = port;
policing[bcast].sharindx = port;
}
/* Setup the matchall policer parameters */
for (port = 0; port < SJA1105_NUM_PORTS; port++) {
int mtu = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN;
if (dsa_is_cpu_port(priv->ds, port))
mtu += VLAN_HLEN;
policing[port].smax = 65535; /* Burst size in bytes */
policing[port].rate = SJA1105_RATE_MBPS(1000);
policing[port].maxlen = mtu;
policing[port].partition = 0;
}
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;
rc = sja1105_init_avb_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[i].role == XMII_MAC)
continue;
if (ports[i].phy_mode == PHY_INTERFACE_MODE_RGMII_RXID ||
ports[i].phy_mode == PHY_INTERFACE_MODE_RGMII_ID)
priv->rgmii_rx_delay[i] = true;
if (ports[i].phy_mode == PHY_INTERFACE_MODE_RGMII_TXID ||
ports[i].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_available_child_of_node(ports_node, child) {
struct device_node *phy_node;
phy_interface_t phy_mode;
u32 index;
int err;
/* 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");
of_node_put(child);
return -ENODEV;
}
/* Get PHY mode from DT */
err = of_get_phy_mode(child, &phy_mode);
if (err) {
dev_err(dev, "Failed to read phy-mode or "
"phy-interface-type property for port %d\n",
index);
of_node_put(child);
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");
of_node_put(child);
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;
}
static int sja1105_sgmii_read(struct sja1105_private *priv, int pcs_reg)
{
const struct sja1105_regs *regs = priv->info->regs;
u32 val;
int rc;
rc = sja1105_xfer_u32(priv, SPI_READ, regs->sgmii + pcs_reg, &val,
NULL);
if (rc < 0)
return rc;
return val;
}
static int sja1105_sgmii_write(struct sja1105_private *priv, int pcs_reg,
u16 pcs_val)
{
const struct sja1105_regs *regs = priv->info->regs;
u32 val = pcs_val;
int rc;
rc = sja1105_xfer_u32(priv, SPI_WRITE, regs->sgmii + pcs_reg, &val,
NULL);
if (rc < 0)
return rc;
return val;
}
static void sja1105_sgmii_pcs_config(struct sja1105_private *priv,
bool an_enabled, bool an_master)
{
u16 ac = SJA1105_AC_AUTONEG_MODE_SGMII;
/* DIGITAL_CONTROL_1: Enable vendor-specific MMD1, allow the PHY to
* stop the clock during LPI mode, make the MAC reconfigure
* autonomously after PCS autoneg is done, flush the internal FIFOs.
*/
sja1105_sgmii_write(priv, SJA1105_DC1, SJA1105_DC1_EN_VSMMD1 |
SJA1105_DC1_CLOCK_STOP_EN |
SJA1105_DC1_MAC_AUTO_SW |
SJA1105_DC1_INIT);
/* DIGITAL_CONTROL_2: No polarity inversion for TX and RX lanes */
sja1105_sgmii_write(priv, SJA1105_DC2, SJA1105_DC2_TX_POL_INV_DISABLE);
/* AUTONEG_CONTROL: Use SGMII autoneg */
if (an_master)
ac |= SJA1105_AC_PHY_MODE | SJA1105_AC_SGMII_LINK;
sja1105_sgmii_write(priv, SJA1105_AC, ac);
/* BASIC_CONTROL: enable in-band AN now, if requested. Otherwise,
* sja1105_sgmii_pcs_force_speed must be called later for the link
* to become operational.
*/
if (an_enabled)
sja1105_sgmii_write(priv, MII_BMCR,
BMCR_ANENABLE | BMCR_ANRESTART);
}
static void sja1105_sgmii_pcs_force_speed(struct sja1105_private *priv,
int speed)
{
int pcs_speed;
switch (speed) {
case SPEED_1000:
pcs_speed = BMCR_SPEED1000;
break;
case SPEED_100:
pcs_speed = BMCR_SPEED100;
break;
case SPEED_10:
pcs_speed = BMCR_SPEED10;
break;
default:
dev_err(priv->ds->dev, "Invalid speed %d\n", speed);
return;
}
sja1105_sgmii_write(priv, MII_BMCR, pcs_speed | BMCR_FULLDPLX);
}
/* Convert link speed from SJA1105 to ethtool encoding */
static int sja1105_speed[] = {
[SJA1105_SPEED_AUTO] = SPEED_UNKNOWN,
[SJA1105_SPEED_10MBPS] = SPEED_10,
[SJA1105_SPEED_100MBPS] = SPEED_100,
[SJA1105_SPEED_1000MBPS] = SPEED_1000,
};
/* Set link speed in the MAC configuration for a specific port. */
static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
int speed_mbps)
{
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;
/* 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.
*/
mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
switch (speed_mbps) {
case SPEED_UNKNOWN:
/* PHYLINK called sja1105_mac_config() to inform us about
* the state->interface, but AN has not completed and the
* speed is not yet valid. UM10944.pdf says that setting
* SJA1105_SPEED_AUTO at runtime disables the port, so that is
* ok for power consumption in case AN will never complete -
* otherwise PHYLINK should come back with a new update.
*/
speed = SJA1105_SPEED_AUTO;
break;
case SPEED_10:
speed = SJA1105_SPEED_10MBPS;
break;
case SPEED_100:
speed = SJA1105_SPEED_100MBPS;
break;
case SPEED_1000:
speed = SJA1105_SPEED_1000MBPS;
break;
default:
dev_err(dev, "Invalid speed %iMbps\n", speed_mbps);
return -EINVAL;
}
/* 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).
* Actually for the SGMII port, the MAC is fixed at 1 Gbps and
* we need to configure the PCS only (if even that).
*/
if (sja1105_supports_sgmii(priv, port))
mac[port].speed = SJA1105_SPEED_1000MBPS;
else
mac[port].speed = speed;
/* Write to the dynamic reconfiguration tables */
rc = sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
&mac[port], 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.
*/
phy_mode = mii->xmii_mode[port];
if (phy_mode != XMII_MODE_RGMII)
return 0;
return sja1105_clocking_setup_port(priv, port);
}
/* The SJA1105 MAC programming model is through the static config (the xMII
* Mode table cannot be dynamically reconfigured), and we have to program
* that early (earlier than PHYLINK calls us, anyway).
* So just error out in case the connected PHY attempts to change the initial
* system interface MII protocol from what is defined in the DT, at least for
* now.
*/
static bool sja1105_phy_mode_mismatch(struct sja1105_private *priv, int port,
phy_interface_t interface)
{
struct sja1105_xmii_params_entry *mii;
sja1105_phy_interface_t phy_mode;
mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
phy_mode = mii->xmii_mode[port];
switch (interface) {
case PHY_INTERFACE_MODE_MII:
return (phy_mode != XMII_MODE_MII);
case PHY_INTERFACE_MODE_RMII:
return (phy_mode != XMII_MODE_RMII);
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:
return (phy_mode != XMII_MODE_RGMII);
case PHY_INTERFACE_MODE_SGMII:
return (phy_mode != XMII_MODE_SGMII);
default:
return true;
}
}
static void sja1105_mac_config(struct dsa_switch *ds, int port,
unsigned int mode,
const struct phylink_link_state *state)
{
struct sja1105_private *priv = ds->priv;
bool is_sgmii = sja1105_supports_sgmii(priv, port);
if (sja1105_phy_mode_mismatch(priv, port, state->interface)) {
dev_err(ds->dev, "Changing PHY mode to %s not supported!\n",
phy_modes(state->interface));
return;
}
if (phylink_autoneg_inband(mode) && !is_sgmii) {
dev_err(ds->dev, "In-band AN not supported!\n");
return;
}
if (is_sgmii)
sja1105_sgmii_pcs_config(priv, phylink_autoneg_inband(mode),
false);
}
static void sja1105_mac_link_down(struct dsa_switch *ds, int port,
unsigned int mode,
phy_interface_t interface)
{
sja1105_inhibit_tx(ds->priv, BIT(port), true);
}
static void sja1105_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 sja1105_private *priv = ds->priv;
sja1105_adjust_port_config(priv, port, speed);
if (sja1105_supports_sgmii(priv, port) && !phylink_autoneg_inband(mode))
sja1105_sgmii_pcs_force_speed(priv, speed);
sja1105_inhibit_tx(priv, BIT(port), false);
}
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;
/* include/linux/phylink.h says:
* When @state->interface is %PHY_INTERFACE_MODE_NA, phylink
* expects the MAC driver to return all supported link modes.
*/
if (state->interface != PHY_INTERFACE_MODE_NA &&
sja1105_phy_mode_mismatch(priv, port, state->interface)) {
bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
return;
}
/* 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);
phylink_set(mask, 100baseT1_Full);
if (mii->xmii_mode[port] == XMII_MODE_RGMII ||
mii->xmii_mode[port] == XMII_MODE_SGMII)
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);
}
static int sja1105_mac_pcs_get_state(struct dsa_switch *ds, int port,
struct phylink_link_state *state)
{
struct sja1105_private *priv = ds->priv;
int ais;
/* Read the vendor-specific AUTONEG_INTR_STATUS register */
ais = sja1105_sgmii_read(priv, SJA1105_AIS);
if (ais < 0)
return ais;
switch (SJA1105_AIS_SPEED(ais)) {
case 0:
state->speed = SPEED_10;
break;
case 1:
state->speed = SPEED_100;
break;
case 2:
state->speed = SPEED_1000;
break;
default:
dev_err(ds->dev, "Invalid SGMII PCS speed %lu\n",
SJA1105_AIS_SPEED(ais));
}
state->duplex = SJA1105_AIS_DUPLEX_MODE(ais);
state->an_complete = SJA1105_AIS_COMPLETE(ais);
state->link = SJA1105_AIS_LINK_STATUS(ais);
return 0;
}
static int
sja1105_find_static_fdb_entry(struct sja1105_private *priv, int port,
const struct sja1105_l2_lookup_entry *requested)
{
struct sja1105_l2_lookup_entry *l2_lookup;
struct sja1105_table *table;
int i;
table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP];
l2_lookup = table->entries;
for (i = 0; i < table->entry_count; i++)
if (l2_lookup[i].macaddr == requested->macaddr &&
l2_lookup[i].vlanid == requested->vlanid &&
l2_lookup[i].destports & BIT(port))
return i;
return -1;
}
/* We want FDB entries added statically through the bridge command to persist
* across switch resets, which are a common thing during normal SJA1105
* operation. So we have to back them up in the static configuration tables
* and hence apply them on next static config upload... yay!
*/
static int
sja1105_static_fdb_change(struct sja1105_private *priv, int port,
const struct sja1105_l2_lookup_entry *requested,
bool keep)
{
struct sja1105_l2_lookup_entry *l2_lookup;
struct sja1105_table *table;
int rc, match;
table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP];
match = sja1105_find_static_fdb_entry(priv, port, requested);
if (match < 0) {
/* Can't delete a missing entry. */
if (!keep)
return 0;
/* No match => new entry */
rc = sja1105_table_resize(table, table->entry_count + 1);
if (rc)
return rc;
match = table->entry_count - 1;
}
/* Assign pointer after the resize (it may be new memory) */
l2_lookup = table->entries;
/* We have a match.
* If the job was to add this FDB entry, it's already done (mostly
* anyway, since the port forwarding mask may have changed, case in
* which we update it).
* Otherwise we have to delete it.
*/
if (keep) {
l2_lookup[match] = *requested;
return 0;
}
/* To remove, the strategy is to overwrite the element with
* the last one, and then reduce the array size by 1
*/
l2_lookup[match] = l2_lookup[table->entry_count - 1];
return sja1105_table_resize(table, table->entry_count - 1);
}
/* 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 int sja1105et_fdb_index(int bin, int way)
{
return bin * SJA1105ET_FDB_BIN_SIZE + way;
}
static int sja1105et_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;
}
int sja1105et_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, rc;
bin = sja1105et_fdb_hash(priv, addr, vid);
way = sja1105et_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);
rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
l2_lookup.index, &l2_lookup,
true);
if (rc < 0)
return rc;
return sja1105_static_fdb_change(priv, port, &l2_lookup, true);
}
int sja1105et_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, rc;
bool keep;
bin = sja1105et_fdb_hash(priv, addr, vid);
way = sja1105et_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.
*/
l2_lookup.destports &= ~BIT(port);
if (l2_lookup.destports)
keep = true;
else
keep = false;
rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
index, &l2_lookup, keep);
if (rc < 0)
return rc;
return sja1105_static_fdb_change(priv, port, &l2_lookup, keep);
}
int sja1105pqrs_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;
int rc, i;
/* Search for an existing entry in the FDB table */
l2_lookup.macaddr = ether_addr_to_u64(addr);
l2_lookup.vlanid = vid;
l2_lookup.iotag = SJA1105_S_TAG;
l2_lookup.mask_macaddr = GENMASK_ULL(ETH_ALEN * 8 - 1, 0);
if (priv->vlan_state != SJA1105_VLAN_UNAWARE) {
l2_lookup.mask_vlanid = VLAN_VID_MASK;
l2_lookup.mask_iotag = BIT(0);
} else {
l2_lookup.mask_vlanid = 0;
l2_lookup.mask_iotag = 0;
}
l2_lookup.destports = BIT(port);
rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
SJA1105_SEARCH, &l2_lookup);
if (rc == 0) {
/* Found and this port is already in the entry's
* port mask => job done
*/
if (l2_lookup.destports & BIT(port))
return 0;
/* l2_lookup.index is populated by the switch in case it
* found something.
*/
l2_lookup.destports |= BIT(port);
goto skip_finding_an_index;
}
/* Not found, so try to find an unused spot in the FDB.
* This is slightly inefficient because the strategy is knock-knock at
* every possible position from 0 to 1023.
*/
for (i = 0; i < SJA1105_MAX_L2_LOOKUP_COUNT; i++) {
rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
i, NULL);
if (rc < 0)
break;
}
if (i == SJA1105_MAX_L2_LOOKUP_COUNT) {
dev_err(ds->dev, "FDB is full, cannot add entry.\n");
return -EINVAL;
}
l2_lookup.lockeds = true;
l2_lookup.index = i;
skip_finding_an_index:
rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
l2_lookup.index, &l2_lookup,
true);
if (rc < 0)
return rc;
return sja1105_static_fdb_change(priv, port, &l2_lookup, true);
}
int sja1105pqrs_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;
bool keep;
int rc;
l2_lookup.macaddr = ether_addr_to_u64(addr);
l2_lookup.vlanid = vid;
l2_lookup.iotag = SJA1105_S_TAG;
l2_lookup.mask_macaddr = GENMASK_ULL(ETH_ALEN * 8 - 1, 0);
if (priv->vlan_state != SJA1105_VLAN_UNAWARE) {
l2_lookup.mask_vlanid = VLAN_VID_MASK;
l2_lookup.mask_iotag = BIT(0);
} else {
l2_lookup.mask_vlanid = 0;
l2_lookup.mask_iotag = 0;
}
l2_lookup.destports = BIT(port);
rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
SJA1105_SEARCH, &l2_lookup);
if (rc < 0)
return 0;
l2_lookup.destports &= ~BIT(port);
/* Decide whether we remove just this port from the FDB entry,
* or if we remove it completely.
*/
if (l2_lookup.destports)
keep = true;
else
keep = false;
rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
l2_lookup.index, &l2_lookup, keep);
if (rc < 0)
return rc;
return sja1105_static_fdb_change(priv, port, &l2_lookup, keep);
}
static int sja1105_fdb_add(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid)
{
struct sja1105_private *priv = ds->priv;
/* dsa_8021q is in effect when the bridge's vlan_filtering isn't,
* so the switch still does some VLAN processing internally.
* But Shared VLAN Learning (SVL) is also active, and it will take
* care of autonomous forwarding between the unique pvid's of each
* port. Here we just make sure that users can't add duplicate FDB
* entries when in this mode - the actual VID doesn't matter except
* for what gets printed in 'bridge fdb show'. In the case of zero,
* no VID gets printed at all.
*/
if (priv->vlan_state != SJA1105_VLAN_FILTERING_FULL)
vid = 0;
return priv->info->fdb_add_cmd(ds, port, addr, vid);
}
static int sja1105_fdb_del(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid)
{
struct sja1105_private *priv = ds->priv;
if (priv->vlan_state != SJA1105_VLAN_FILTERING_FULL)
vid = 0;
return priv->info->fdb_del_cmd(ds, port, addr, vid);
}
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 == -ENOENT)
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);
/* We need to hide the dsa_8021q VLANs from the user. */
if (priv->vlan_state == SJA1105_VLAN_UNAWARE)
l2_lookup.vlanid = 0;
cb(macaddr, l2_lookup.vlanid, l2_lookup.lockeds, 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 const char * const sja1105_reset_reasons[] = {
[SJA1105_VLAN_FILTERING] = "VLAN filtering",
[SJA1105_RX_HWTSTAMPING] = "RX timestamping",
[SJA1105_AGEING_TIME] = "Ageing time",
[SJA1105_SCHEDULING] = "Time-aware scheduling",
[SJA1105_BEST_EFFORT_POLICING] = "Best-effort policing",
[SJA1105_VIRTUAL_LINKS] = "Virtual links",
};
/* 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.
*/
int sja1105_static_config_reload(struct sja1105_private *priv,
enum sja1105_reset_reason reason)
{
struct ptp_system_timestamp ptp_sts_before;
struct ptp_system_timestamp ptp_sts_after;
struct sja1105_mac_config_entry *mac;
int speed_mbps[SJA1105_NUM_PORTS];
struct dsa_switch *ds = priv->ds;
s64 t1, t2, t3, t4;
s64 t12, t34;
u16 bmcr = 0;
int rc, i;
s64 now;
mutex_lock(&priv->mgmt_lock);
mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
/* Back up the dynamic link speed changed by sja1105_adjust_port_config
* in order to temporarily restore it to SJA1105_SPEED_AUTO - which the
* switch wants to see in the static config in order to allow us to
* change it through the dynamic interface later.
*/
for (i = 0; i < SJA1105_NUM_PORTS; i++) {
speed_mbps[i] = sja1105_speed[mac[i].speed];
mac[i].speed = SJA1105_SPEED_AUTO;
}
if (sja1105_supports_sgmii(priv, SJA1105_SGMII_PORT))
bmcr = sja1105_sgmii_read(priv, MII_BMCR);
/* No PTP operations can run right now */
mutex_lock(&priv->ptp_data.lock);
rc = __sja1105_ptp_gettimex(ds, &now, &ptp_sts_before);
if (rc < 0)
goto out_unlock_ptp;
/* Reset switch and send updated static configuration */
rc = sja1105_static_config_upload(priv);
if (rc < 0)
goto out_unlock_ptp;
rc = __sja1105_ptp_settime(ds, 0, &ptp_sts_after);
if (rc < 0)
goto out_unlock_ptp;
t1 = timespec64_to_ns(&ptp_sts_before.pre_ts);
t2 = timespec64_to_ns(&ptp_sts_before.post_ts);
t3 = timespec64_to_ns(&ptp_sts_after.pre_ts);
t4 = timespec64_to_ns(&ptp_sts_after.post_ts);
/* Mid point, corresponds to pre-reset PTPCLKVAL */
t12 = t1 + (t2 - t1) / 2;
/* Mid point, corresponds to post-reset PTPCLKVAL, aka 0 */
t34 = t3 + (t4 - t3) / 2;
/* Advance PTPCLKVAL by the time it took since its readout */
now += (t34 - t12);
__sja1105_ptp_adjtime(ds, now);
out_unlock_ptp:
mutex_unlock(&priv->ptp_data.lock);
dev_info(priv->ds->dev,
"Reset switch and programmed static config. Reason: %s\n",
sja1105_reset_reasons[reason]);
/* 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++) {
rc = sja1105_adjust_port_config(priv, i, speed_mbps[i]);
if (rc < 0)
goto out;
}
if (sja1105_supports_sgmii(priv, SJA1105_SGMII_PORT)) {
bool an_enabled = !!(bmcr & BMCR_ANENABLE);
sja1105_sgmii_pcs_config(priv, an_enabled, false);
if (!an_enabled) {
int speed = SPEED_UNKNOWN;
if (bmcr & BMCR_SPEED1000)
speed = SPEED_1000;
else if (bmcr & BMCR_SPEED100)
speed = SPEED_100;
else if (bmcr & BMCR_SPEED10)
speed = SPEED_10;
sja1105_sgmii_pcs_force_speed(priv, speed);
}
}
out:
mutex_unlock(&priv->mgmt_lock);
return rc;
}
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_crosschip_bridge_join(struct dsa_switch *ds,
int tree_index, int sw_index,
int other_port, struct net_device *br)
{
struct dsa_switch *other_ds = dsa_switch_find(tree_index, sw_index);
struct sja1105_private *other_priv = other_ds->priv;
struct sja1105_private *priv = ds->priv;
int port, rc;
if (other_ds->ops != &sja1105_switch_ops)
return 0;
for (port = 0; port < ds->num_ports; port++) {
if (!dsa_is_user_port(ds, port))
continue;
if (dsa_to_port(ds, port)->bridge_dev != br)
continue;
other_priv->expect_dsa_8021q = true;
rc = dsa_8021q_crosschip_bridge_join(ds, port, other_ds,
other_port,
&priv->crosschip_links);
other_priv->expect_dsa_8021q = false;
if (rc)
return rc;
priv->expect_dsa_8021q = true;
rc = dsa_8021q_crosschip_bridge_join(other_ds, other_port, ds,
port,
&other_priv->crosschip_links);
priv->expect_dsa_8021q = false;
if (rc)
return rc;
}
return 0;
}
static void sja1105_crosschip_bridge_leave(struct dsa_switch *ds,
int tree_index, int sw_index,
int other_port,
struct net_device *br)
{
struct dsa_switch *other_ds = dsa_switch_find(tree_index, sw_index);
struct sja1105_private *other_priv = other_ds->priv;
struct sja1105_private *priv = ds->priv;
int port;
if (other_ds->ops != &sja1105_switch_ops)
return;
for (port = 0; port < ds->num_ports; port++) {
if (!dsa_is_user_port(ds, port))
continue;
if (dsa_to_port(ds, port)->bridge_dev != br)
continue;
other_priv->expect_dsa_8021q = true;
dsa_8021q_crosschip_bridge_leave(ds, port, other_ds, other_port,
&priv->crosschip_links);
other_priv->expect_dsa_8021q = false;
priv->expect_dsa_8021q = true;
dsa_8021q_crosschip_bridge_leave(other_ds, other_port, ds, port,
&other_priv->crosschip_links);
priv->expect_dsa_8021q = false;
}
}
static int sja1105_setup_8021q_tagging(struct dsa_switch *ds, bool enabled)
{
struct sja1105_private *priv = ds->priv;
int rc, i;
for (i = 0; i < SJA1105_NUM_PORTS; i++) {
priv->expect_dsa_8021q = true;
rc = dsa_port_setup_8021q_tagging(ds, i, enabled);
priv->expect_dsa_8021q = false;
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,
enum dsa_tag_protocol mp)
{
return DSA_TAG_PROTO_SJA1105;
}
static int sja1105_find_free_subvlan(u16 *subvlan_map, bool pvid)
{
int subvlan;
if (pvid)
return 0;
for (subvlan = 1; subvlan < DSA_8021Q_N_SUBVLAN; subvlan++)
if (subvlan_map[subvlan] == VLAN_N_VID)
return subvlan;
return -1;
}
static int sja1105_find_subvlan(u16 *subvlan_map, u16 vid)
{
int subvlan;
for (subvlan = 0; subvlan < DSA_8021Q_N_SUBVLAN; subvlan++)
if (subvlan_map[subvlan] == vid)
return subvlan;
return -1;
}
static int sja1105_find_committed_subvlan(struct sja1105_private *priv,
int port, u16 vid)
{
struct sja1105_port *sp = &priv->ports[port];
return sja1105_find_subvlan(sp->subvlan_map, vid);
}
static void sja1105_init_subvlan_map(u16 *subvlan_map)
{
int subvlan;
for (subvlan = 0; subvlan < DSA_8021Q_N_SUBVLAN; subvlan++)
subvlan_map[subvlan] = VLAN_N_VID;
}
static void sja1105_commit_subvlan_map(struct sja1105_private *priv, int port,
u16 *subvlan_map)
{
struct sja1105_port *sp = &priv->ports[port];
int subvlan;
for (subvlan = 0; subvlan < DSA_8021Q_N_SUBVLAN; subvlan++)
sp->subvlan_map[subvlan] = subvlan_map[subvlan];
}
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_find_retagging_entry(struct sja1105_retagging_entry *retagging,
int count, int from_port, u16 from_vid,
u16 to_vid)
{
int i;
for (i = 0; i < count; i++)
if (retagging[i].ing_port == BIT(from_port) &&
retagging[i].vlan_ing == from_vid &&
retagging[i].vlan_egr == to_vid)
return i;
/* Return an invalid entry index if not found */
return -1;
}
static int sja1105_commit_vlans(struct sja1105_private *priv,
struct sja1105_vlan_lookup_entry *new_vlan,
struct sja1105_retagging_entry *new_retagging,
int num_retagging)
{
struct sja1105_retagging_entry *retagging;
struct sja1105_vlan_lookup_entry *vlan;
struct sja1105_table *table;
int num_vlans = 0;
int rc, i, k = 0;
/* VLAN table */
table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
vlan = table->entries;
for (i = 0; i < VLAN_N_VID; i++) {
int match = sja1105_is_vlan_configured(priv, i);
if (new_vlan[i].vlanid != VLAN_N_VID)
num_vlans++;
if (new_vlan[i].vlanid == VLAN_N_VID && match >= 0) {
/* Was there before, no longer is. Delete */
dev_dbg(priv->ds->dev, "Deleting VLAN %d\n", i);
rc = sja1105_dynamic_config_write(priv,
BLK_IDX_VLAN_LOOKUP,
i, &vlan[match], false);
if (rc < 0)
return rc;
} else if (new_vlan[i].vlanid != VLAN_N_VID) {
/* Nothing changed, don't do anything */
if (match >= 0 &&
vlan[match].vlanid == new_vlan[i].vlanid &&
vlan[match].tag_port == new_vlan[i].tag_port &&
vlan[match].vlan_bc == new_vlan[i].vlan_bc &&
vlan[match].vmemb_port == new_vlan[i].vmemb_port)
continue;
/* Update entry */
dev_dbg(priv->ds->dev, "Updating VLAN %d\n", i);
rc = sja1105_dynamic_config_write(priv,
BLK_IDX_VLAN_LOOKUP,
i, &new_vlan[i],
true);
if (rc < 0)
return rc;
}
}
if (table->entry_count)
kfree(table->entries);
table->entries = kcalloc(num_vlans, table->ops->unpacked_entry_size,
GFP_KERNEL);
if (!table->entries)
return -ENOMEM;
table->entry_count = num_vlans;
vlan = table->entries;
for (i = 0; i < VLAN_N_VID; i++) {
if (new_vlan[i].vlanid == VLAN_N_VID)
continue;
vlan[k++] = new_vlan[i];
}
/* VLAN Retagging Table */
table = &priv->static_config.tables[BLK_IDX_RETAGGING];
retagging = table->entries;
for (i = 0; i < table->entry_count; i++) {
rc = sja1105_dynamic_config_write(priv, BLK_IDX_RETAGGING,
i, &retagging[i], false);
if (rc)
return rc;
}
if (table->entry_count)
kfree(table->entries);
table->entries = kcalloc(num_retagging, table->ops->unpacked_entry_size,
GFP_KERNEL);
if (!table->entries)
return -ENOMEM;
table->entry_count = num_retagging;
retagging = table->entries;
for (i = 0; i < num_retagging; i++) {
retagging[i] = new_retagging[i];
/* Update entry */
rc = sja1105_dynamic_config_write(priv, BLK_IDX_RETAGGING,
i, &retagging[i], true);
if (rc < 0)
return rc;
}
return 0;
}
struct sja1105_crosschip_vlan {
struct list_head list;
u16 vid;
bool untagged;
int port;
int other_port;
struct dsa_switch *other_ds;
};
struct sja1105_crosschip_switch {
struct list_head list;
struct dsa_switch *other_ds;
};
static int sja1105_commit_pvid(struct sja1105_private *priv)
{
struct sja1105_bridge_vlan *v;
struct list_head *vlan_list;
int rc = 0;
if (priv->vlan_state == SJA1105_VLAN_FILTERING_FULL)
vlan_list = &priv->bridge_vlans;
else
vlan_list = &priv->dsa_8021q_vlans;
list_for_each_entry(v, vlan_list, list) {
if (v->pvid) {
rc = sja1105_pvid_apply(priv, v->port, v->vid);
if (rc)
break;
}
}
return rc;
}
static int
sja1105_build_bridge_vlans(struct sja1105_private *priv,
struct sja1105_vlan_lookup_entry *new_vlan)
{
struct sja1105_bridge_vlan *v;
if (priv->vlan_state == SJA1105_VLAN_UNAWARE)
return 0;
list_for_each_entry(v, &priv->bridge_vlans, list) {
int match = v->vid;
new_vlan[match].vlanid = v->vid;
new_vlan[match].vmemb_port |= BIT(v->port);
new_vlan[match].vlan_bc |= BIT(v->port);
if (!v->untagged)
new_vlan[match].tag_port |= BIT(v->port);
}
return 0;
}
static int
sja1105_build_dsa_8021q_vlans(struct sja1105_private *priv,
struct sja1105_vlan_lookup_entry *new_vlan)
{
struct sja1105_bridge_vlan *v;
if (priv->vlan_state == SJA1105_VLAN_FILTERING_FULL)
return 0;
list_for_each_entry(v, &priv->dsa_8021q_vlans, list) {
int match = v->vid;
new_vlan[match].vlanid = v->vid;
new_vlan[match].vmemb_port |= BIT(v->port);
new_vlan[match].vlan_bc |= BIT(v->port);
if (!v->untagged)
new_vlan[match].tag_port |= BIT(v->port);
}
return 0;
}
static int sja1105_build_subvlans(struct sja1105_private *priv,
u16 subvlan_map[][DSA_8021Q_N_SUBVLAN],
struct sja1105_vlan_lookup_entry *new_vlan,
struct sja1105_retagging_entry *new_retagging,
int *num_retagging)
{
struct sja1105_bridge_vlan *v;
int k = *num_retagging;
if (priv->vlan_state != SJA1105_VLAN_BEST_EFFORT)
return 0;
list_for_each_entry(v, &priv->bridge_vlans, list) {
int upstream = dsa_upstream_port(priv->ds, v->port);
int match, subvlan;
u16 rx_vid;
/* Only sub-VLANs on user ports need to be applied.
* Bridge VLANs also include VLANs added automatically
* by DSA on the CPU port.
*/
if (!dsa_is_user_port(priv->ds, v->port))
continue;
subvlan = sja1105_find_subvlan(subvlan_map[v->port],
v->vid);
if (subvlan < 0) {
subvlan = sja1105_find_free_subvlan(subvlan_map[v->port],
v->pvid);
if (subvlan < 0) {
dev_err(priv->ds->dev, "No more free subvlans\n");
return -ENOSPC;
}
}
rx_vid = dsa_8021q_rx_vid_subvlan(priv->ds, v->port, subvlan);
/* @v->vid on @v->port needs to be retagged to @rx_vid
* on @upstream. Assume @v->vid on @v->port and on
* @upstream was already configured by the previous
* iteration over bridge_vlans.
*/
match = rx_vid;
new_vlan[match].vlanid = rx_vid;
new_vlan[match].vmemb_port |= BIT(v->port);
new_vlan[match].vmemb_port |= BIT(upstream);
new_vlan[match].vlan_bc |= BIT(v->port);
new_vlan[match].vlan_bc |= BIT(upstream);
/* The "untagged" flag is set the same as for the
* original VLAN
*/
if (!v->untagged)
new_vlan[match].tag_port |= BIT(v->port);
/* But it's always tagged towards the CPU */
new_vlan[match].tag_port |= BIT(upstream);
/* The Retagging Table generates packet *clones* with
* the new VLAN. This is a very odd hardware quirk
* which we need to suppress by dropping the original
* packet.
* Deny egress of the original VLAN towards the CPU
* port. This will force the switch to drop it, and
* we'll see only the retagged packets.
*/
match = v->vid;
new_vlan[match].vlan_bc &= ~BIT(upstream);
/* And the retagging itself */
new_retagging[k].vlan_ing = v->vid;
new_retagging[k].vlan_egr = rx_vid;
new_retagging[k].ing_port = BIT(v->port);
new_retagging[k].egr_port = BIT(upstream);
if (k++ == SJA1105_MAX_RETAGGING_COUNT) {
dev_err(priv->ds->dev, "No more retagging rules\n");
return -ENOSPC;
}
subvlan_map[v->port][subvlan] = v->vid;
}
*num_retagging = k;
return 0;
}
/* Sadly, in crosschip scenarios where the CPU port is also the link to another
* switch, we should retag backwards (the dsa_8021q vid to the original vid) on
* the CPU port of neighbour switches.
*/
static int
sja1105_build_crosschip_subvlans(struct sja1105_private *priv,
struct sja1105_vlan_lookup_entry *new_vlan,
struct sja1105_retagging_entry *new_retagging,
int *num_retagging)
{
struct sja1105_crosschip_vlan *tmp, *pos;
struct dsa_8021q_crosschip_link *c;
struct sja1105_bridge_vlan *v, *w;
struct list_head crosschip_vlans;
int k = *num_retagging;
int rc = 0;
if (priv->vlan_state != SJA1105_VLAN_BEST_EFFORT)
return 0;
INIT_LIST_HEAD(&crosschip_vlans);
list_for_each_entry(c, &priv->crosschip_links, list) {
struct sja1105_private *other_priv = c->other_ds->priv;
if (other_priv->vlan_state == SJA1105_VLAN_FILTERING_FULL)
continue;
/* Crosschip links are also added to the CPU ports.
* Ignore those.
*/
if (!dsa_is_user_port(priv->ds, c->port))
continue;
if (!dsa_is_user_port(c->other_ds, c->other_port))
continue;
/* Search for VLANs on the remote port */
list_for_each_entry(v, &other_priv->bridge_vlans, list) {
bool already_added = false;
bool we_have_it = false;
if (v->port != c->other_port)
continue;
/* If @v is a pvid on @other_ds, it does not need
* re-retagging, because its SVL field is 0 and we
* already allow that, via the dsa_8021q crosschip
* links.
*/
if (v->pvid)
continue;
/* Search for the VLAN on our local port */
list_for_each_entry(w, &priv->bridge_vlans, list) {
if (w->port == c->port && w->vid == v->vid) {
we_have_it = true;
break;
}
}
if (!we_have_it)
continue;
list_for_each_entry(tmp, &crosschip_vlans, list) {
if (tmp->vid == v->vid &&
tmp->untagged == v->untagged &&
tmp->port == c->port &&
tmp->other_port == v->port &&
tmp->other_ds == c->other_ds) {
already_added = true;
break;
}
}
if (already_added)
continue;
tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
if (!tmp) {
dev_err(priv->ds->dev, "Failed to allocate memory\n");
rc = -ENOMEM;
goto out;
}
tmp->vid = v->vid;
tmp->port = c->port;
tmp->other_port = v->port;
tmp->other_ds = c->other_ds;
tmp->untagged = v->untagged;
list_add(&tmp->list, &crosschip_vlans);
}
}
list_for_each_entry(tmp, &crosschip_vlans, list) {
struct sja1105_private *other_priv = tmp->other_ds->priv;
int upstream = dsa_upstream_port(priv->ds, tmp->port);
int match, subvlan;
u16 rx_vid;
subvlan = sja1105_find_committed_subvlan(other_priv,
tmp->other_port,
tmp->vid);
/* If this happens, it's a bug. The neighbour switch does not
* have a subvlan for tmp->vid on tmp->other_port, but it
* should, since we already checked for its vlan_state.
*/
if (WARN_ON(subvlan < 0)) {
rc = -EINVAL;
goto out;
}
rx_vid = dsa_8021q_rx_vid_subvlan(tmp->other_ds,
tmp->other_port,
subvlan);
/* The @rx_vid retagged from @tmp->vid on
* {@tmp->other_ds, @tmp->other_port} needs to be
* re-retagged to @tmp->vid on the way back to us.
*
* Assume the original @tmp->vid is already configured
* on this local switch, otherwise we wouldn't be
* retagging its subvlan on the other switch in the
* first place. We just need to add a reverse retagging
* rule for @rx_vid and install @rx_vid on our ports.
*/
match = rx_vid;
new_vlan[match].vlanid = rx_vid;
new_vlan[match].vmemb_port |= BIT(tmp->port);
new_vlan[match].vmemb_port |= BIT(upstream);
/* The "untagged" flag is set the same as for the
* original VLAN. And towards the CPU, it doesn't
* really matter, because @rx_vid will only receive
* traffic on that port. For consistency with other dsa_8021q
* VLANs, we'll keep the CPU port tagged.
*/
if (!tmp->untagged)
new_vlan[match].tag_port |= BIT(tmp->port);
new_vlan[match].tag_port |= BIT(upstream);
/* Deny egress of @rx_vid towards our front-panel port.
* This will force the switch to drop it, and we'll see
* only the re-retagged packets (having the original,
* pre-initial-retagging, VLAN @tmp->vid).
*/
new_vlan[match].vlan_bc &= ~BIT(tmp->port);
/* On reverse retagging, the same ingress VLAN goes to multiple
* ports. So we have an opportunity to create composite rules
* to not waste the limited space in the retagging table.
*/
k = sja1105_find_retagging_entry(new_retagging, *num_retagging,
upstream, rx_vid, tmp->vid);
if (k < 0) {
if (*num_retagging == SJA1105_MAX_RETAGGING_COUNT) {
dev_err(priv->ds->dev, "No more retagging rules\n");
rc = -ENOSPC;
goto out;
}
k = (*num_retagging)++;
}
/* And the retagging itself */
new_retagging[k].vlan_ing = rx_vid;
new_retagging[k].vlan_egr = tmp->vid;
new_retagging[k].ing_port = BIT(upstream);
new_retagging[k].egr_port |= BIT(tmp->port);
}
out:
list_for_each_entry_safe(tmp, pos, &crosschip_vlans, list) {
list_del(&tmp->list);
kfree(tmp);
}
return rc;
}
static int sja1105_build_vlan_table(struct sja1105_private *priv, bool notify);
static int sja1105_notify_crosschip_switches(struct sja1105_private *priv)
{
struct sja1105_crosschip_switch *s, *pos;
struct list_head crosschip_switches;
struct dsa_8021q_crosschip_link *c;
int rc = 0;
INIT_LIST_HEAD(&crosschip_switches);
list_for_each_entry(c, &priv->crosschip_links, list) {
bool already_added = false;
list_for_each_entry(s, &crosschip_switches, list) {
if (s->other_ds == c->other_ds) {
already_added = true;
break;
}
}
if (already_added)
continue;
s = kzalloc(sizeof(*s), GFP_KERNEL);
if (!s) {
dev_err(priv->ds->dev, "Failed to allocate memory\n");
rc = -ENOMEM;
goto out;
}
s->other_ds = c->other_ds;
list_add(&s->list, &crosschip_switches);
}
list_for_each_entry(s, &crosschip_switches, list) {
struct sja1105_private *other_priv = s->other_ds->priv;
rc = sja1105_build_vlan_table(other_priv, false);
if (rc)
goto out;
}
out:
list_for_each_entry_safe(s, pos, &crosschip_switches, list) {
list_del(&s->list);
kfree(s);
}
return rc;
}
static int sja1105_build_vlan_table(struct sja1105_private *priv, bool notify)
{
u16 subvlan_map[SJA1105_NUM_PORTS][DSA_8021Q_N_SUBVLAN];
struct sja1105_retagging_entry *new_retagging;
struct sja1105_vlan_lookup_entry *new_vlan;
struct sja1105_table *table;
int i, num_retagging = 0;
int rc;
table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
new_vlan = kcalloc(VLAN_N_VID,
table->ops->unpacked_entry_size, GFP_KERNEL);
if (!new_vlan)
return -ENOMEM;
table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
new_retagging = kcalloc(SJA1105_MAX_RETAGGING_COUNT,
table->ops->unpacked_entry_size, GFP_KERNEL);
if (!new_retagging) {
kfree(new_vlan);
return -ENOMEM;
}
for (i = 0; i < VLAN_N_VID; i++)
new_vlan[i].vlanid = VLAN_N_VID;
for (i = 0; i < SJA1105_MAX_RETAGGING_COUNT; i++)
new_retagging[i].vlan_ing = VLAN_N_VID;
for (i = 0; i < priv->ds->num_ports; i++)
sja1105_init_subvlan_map(subvlan_map[i]);
/* Bridge VLANs */
rc = sja1105_build_bridge_vlans(priv, new_vlan);
if (rc)
goto out;
/* VLANs necessary for dsa_8021q operation, given to us by tag_8021q.c:
* - RX VLANs
* - TX VLANs
* - Crosschip links
*/
rc = sja1105_build_dsa_8021q_vlans(priv, new_vlan);
if (rc)
goto out;
/* Private VLANs necessary for dsa_8021q operation, which we need to
* determine on our own:
* - Sub-VLANs
* - Sub-VLANs of crosschip switches
*/
rc = sja1105_build_subvlans(priv, subvlan_map, new_vlan, new_retagging,
&num_retagging);
if (rc)
goto out;
rc = sja1105_build_crosschip_subvlans(priv, new_vlan, new_retagging,
&num_retagging);
if (rc)
goto out;
rc = sja1105_commit_vlans(priv, new_vlan, new_retagging, num_retagging);
if (rc)
goto out;
rc = sja1105_commit_pvid(priv);
if (rc)
goto out;
for (i = 0; i < priv->ds->num_ports; i++)
sja1105_commit_subvlan_map(priv, i, subvlan_map[i]);
if (notify) {
rc = sja1105_notify_crosschip_switches(priv);
if (rc)
goto out;
}
out:
kfree(new_vlan);
kfree(new_retagging);
return rc;
}
/* Select the list to which we should add this VLAN. */
static struct list_head *sja1105_classify_vlan(struct sja1105_private *priv,
u16 vid)
{
if (priv->expect_dsa_8021q)
return &priv->dsa_8021q_vlans;
return &priv->bridge_vlans;
}
static int sja1105_vlan_prepare(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
struct sja1105_private *priv = ds->priv;
u16 vid;
if (priv->vlan_state == SJA1105_VLAN_FILTERING_FULL)
return 0;
/* If the user wants best-effort VLAN filtering (aka vlan_filtering
* bridge plus tagging), be sure to at least deny alterations to the
* configuration done by dsa_8021q.
*/
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
if (!priv->expect_dsa_8021q && vid_is_dsa_8021q(vid)) {
dev_err(ds->dev, "Range 1024-3071 reserved for dsa_8021q operation\n");
return -EBUSY;
}
}
return 0;
}
/* 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_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
{
struct sja1105_l2_lookup_params_entry *l2_lookup_params;
struct sja1105_general_params_entry *general_params;
struct sja1105_private *priv = ds->priv;
enum sja1105_vlan_state state;
struct sja1105_table *table;
struct sja1105_rule *rule;
bool want_tagging;
u16 tpid, tpid2;
int rc;
list_for_each_entry(rule, &priv->flow_block.rules, list) {
if (rule->type == SJA1105_RULE_VL) {
dev_err(ds->dev,
"Cannot change VLAN filtering state while VL rules are active\n");
return -EBUSY;
}
}
if (enabled) {
/* Enable VLAN filtering. */
tpid = ETH_P_8021Q;
tpid2 = ETH_P_8021AD;
} else {
/* Disable VLAN filtering. */
tpid = ETH_P_SJA1105;
tpid2 = ETH_P_SJA1105;
}
for (port = 0; port < ds->num_ports; port++) {
struct sja1105_port *sp = &priv->ports[port];
if (enabled)
sp->xmit_tpid = priv->info->qinq_tpid;
else
sp->xmit_tpid = ETH_P_SJA1105;
}
if (!enabled)
state = SJA1105_VLAN_UNAWARE;
else if (priv->best_effort_vlan_filtering)
state = SJA1105_VLAN_BEST_EFFORT;
else
state = SJA1105_VLAN_FILTERING_FULL;
if (priv->vlan_state == state)
return 0;
priv->vlan_state = state;
want_tagging = (state == SJA1105_VLAN_UNAWARE ||
state == SJA1105_VLAN_BEST_EFFORT);
table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
general_params = table->entries;
/* EtherType used to identify inner tagged (C-tag) VLAN traffic */
general_params->tpid = tpid;
/* EtherType used to identify outer tagged (S-tag) VLAN traffic */
general_params->tpid2 = tpid2;
/* When VLAN filtering is on, we need to at least be able to
* decode management traffic through the "backup plan".
*/
general_params->incl_srcpt1 = enabled;
general_params->incl_srcpt0 = enabled;
want_tagging = priv->best_effort_vlan_filtering || !enabled;
/* VLAN filtering => independent VLAN learning.
* No VLAN filtering (or best effort) => shared VLAN learning.
*
* In shared VLAN learning mode, untagged traffic still gets
* pvid-tagged, and the FDB table gets populated with entries
* containing the "real" (pvid or from VLAN tag) VLAN ID.
* However the switch performs a masked L2 lookup in the FDB,
* effectively only looking up a frame's DMAC (and not VID) for the
* forwarding decision.
*
* This is extremely convenient for us, because in modes with
* vlan_filtering=0, dsa_8021q actually installs unique pvid's into
* each front panel port. This is good for identification but breaks
* learning badly - the VID of the learnt FDB entry is unique, aka
* no frames coming from any other port are going to have it. So
* for forwarding purposes, this is as though learning was broken
* (all frames get flooded).
*/
table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS];
l2_lookup_params = table->entries;
l2_lookup_params->shared_learn = want_tagging;
sja1105_frame_memory_partitioning(priv);
rc = sja1105_static_config_reload(priv, SJA1105_VLAN_FILTERING);
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 (of course, the
* user may know better, i.e. best_effort_vlan_filtering).
*/
return sja1105_setup_8021q_tagging(ds, want_tagging);
}
static void sja1105_vlan_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
struct sja1105_private *priv = ds->priv;
bool vlan_table_changed = false;
u16 vid;
int rc;
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
struct sja1105_bridge_vlan *v;
struct list_head *vlan_list;
bool already_added = false;
vlan_list = sja1105_classify_vlan(priv, vid);
list_for_each_entry(v, vlan_list, list) {
if (v->port == port && v->vid == vid &&
v->untagged == untagged && v->pvid == pvid) {
already_added = true;
break;
}
}
if (already_added)
continue;
v = kzalloc(sizeof(*v), GFP_KERNEL);
if (!v) {
dev_err(ds->dev, "Out of memory while storing VLAN\n");
return;
}
v->port = port;
v->vid = vid;
v->untagged = untagged;
v->pvid = pvid;
list_add(&v->list, vlan_list);
vlan_table_changed = true;
}
if (!vlan_table_changed)
return;
rc = sja1105_build_vlan_table(priv, true);
if (rc)
dev_err(ds->dev, "Failed to build VLAN table: %d\n", rc);
}
static int sja1105_vlan_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
struct sja1105_private *priv = ds->priv;
bool vlan_table_changed = false;
u16 vid;
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
struct sja1105_bridge_vlan *v, *n;
struct list_head *vlan_list;
vlan_list = sja1105_classify_vlan(priv, vid);
list_for_each_entry_safe(v, n, vlan_list, list) {
if (v->port == port && v->vid == vid) {
list_del(&v->list);
kfree(v);
vlan_table_changed = true;
break;
}
}
}
if (!vlan_table_changed)
return 0;
return sja1105_build_vlan_table(priv, true);
}
static int sja1105_best_effort_vlan_filtering_get(struct sja1105_private *priv,
bool *be_vlan)
{
*be_vlan = priv->best_effort_vlan_filtering;
return 0;
}
static int sja1105_best_effort_vlan_filtering_set(struct sja1105_private *priv,
bool be_vlan)
{
struct dsa_switch *ds = priv->ds;
bool vlan_filtering;
int port;
int rc;
priv->best_effort_vlan_filtering = be_vlan;
rtnl_lock();
for (port = 0; port < ds->num_ports; port++) {
struct dsa_port *dp;
if (!dsa_is_user_port(ds, port))
continue;
dp = dsa_to_port(ds, port);
vlan_filtering = dsa_port_is_vlan_filtering(dp);
rc = sja1105_vlan_filtering(ds, port, vlan_filtering);
if (rc)
break;
}
rtnl_unlock();
return rc;
}
enum sja1105_devlink_param_id {
SJA1105_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
SJA1105_DEVLINK_PARAM_ID_BEST_EFFORT_VLAN_FILTERING,
};
static int sja1105_devlink_param_get(struct dsa_switch *ds, u32 id,
struct devlink_param_gset_ctx *ctx)
{
struct sja1105_private *priv = ds->priv;
int err;
switch (id) {
case SJA1105_DEVLINK_PARAM_ID_BEST_EFFORT_VLAN_FILTERING:
err = sja1105_best_effort_vlan_filtering_get(priv,
&ctx->val.vbool);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int sja1105_devlink_param_set(struct dsa_switch *ds, u32 id,
struct devlink_param_gset_ctx *ctx)
{
struct sja1105_private *priv = ds->priv;
int err;
switch (id) {
case SJA1105_DEVLINK_PARAM_ID_BEST_EFFORT_VLAN_FILTERING:
err = sja1105_best_effort_vlan_filtering_set(priv,
ctx->val.vbool);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static const struct devlink_param sja1105_devlink_params[] = {
DSA_DEVLINK_PARAM_DRIVER(SJA1105_DEVLINK_PARAM_ID_BEST_EFFORT_VLAN_FILTERING,
"best_effort_vlan_filtering",
DEVLINK_PARAM_TYPE_BOOL,
BIT(DEVLINK_PARAM_CMODE_RUNTIME)),
};
static int sja1105_setup_devlink_params(struct dsa_switch *ds)
{
return dsa_devlink_params_register(ds, sja1105_devlink_params,
ARRAY_SIZE(sja1105_devlink_params));
}
static void sja1105_teardown_devlink_params(struct dsa_switch *ds)
{
dsa_devlink_params_unregister(ds, sja1105_devlink_params,
ARRAY_SIZE(sja1105_devlink_params));
}
/* 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;
}
rc = sja1105_ptp_clock_register(ds);
if (rc < 0) {
dev_err(ds->dev, "Failed to register PTP clock: %d\n", rc);
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;
/* Advertise the 8 egress queues */
ds->num_tx_queues = SJA1105_NUM_TC;
ds->mtu_enforcement_ingress = true;
ds->configure_vlan_while_not_filtering = true;
rc = sja1105_setup_devlink_params(ds);
if (rc < 0)
return rc;
/* 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 void sja1105_teardown(struct dsa_switch *ds)
{
struct sja1105_private *priv = ds->priv;
struct sja1105_bridge_vlan *v, *n;
int port;
for (port = 0; port < SJA1105_NUM_PORTS; port++) {
struct sja1105_port *sp = &priv->ports[port];
if (!dsa_is_user_port(ds, port))
continue;
if (sp->xmit_worker)
kthread_destroy_worker(sp->xmit_worker);
}
sja1105_teardown_devlink_params(ds);
sja1105_flower_teardown(ds);
sja1105_tas_teardown(ds);
sja1105_ptp_clock_unregister(ds);
sja1105_static_config_free(&priv->static_config);
list_for_each_entry_safe(v, n, &priv->dsa_8021q_vlans, list) {
list_del(&v->list);
kfree(v);
}
list_for_each_entry_safe(v, n, &priv->bridge_vlans, list) {
list_del(&v->list);
kfree(v);
}
}
static int sja1105_port_enable(struct dsa_switch *ds, int port,
struct phy_device *phy)
{
struct net_device *slave;
if (!dsa_is_user_port(ds, port))
return 0;
slave = dsa_to_port(ds, port)->slave;
slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
return 0;
}
static void sja1105_port_disable(struct dsa_switch *ds, int port)
{
struct sja1105_private *priv = ds->priv;
struct sja1105_port *sp = &priv->ports[port];
if (!dsa_is_user_port(ds, port))
return;
kthread_cancel_work_sync(&sp->xmit_work);
skb_queue_purge(&sp->xmit_queue);
}
static int sja1105_mgmt_xmit(struct dsa_switch *ds, int port, int slot,
struct sk_buff *skb, bool takets)
{
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;
mgmt_route.tsreg = 0;
mgmt_route.takets = takets;
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, dsa_to_port(ds, 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.
* This is only hardware supported on P/Q/R/S - on E/T it is
* a no-op and we are silently discarding the -EOPNOTSUPP.
*/
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;
}
#define work_to_port(work) \
container_of((work), struct sja1105_port, xmit_work)
#define tagger_to_sja1105(t) \
container_of((t), struct sja1105_private, tagger_data)
/* 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 void sja1105_port_deferred_xmit(struct kthread_work *work)
{
struct sja1105_port *sp = work_to_port(work);
struct sja1105_tagger_data *tagger_data = sp->data;
struct sja1105_private *priv = tagger_to_sja1105(tagger_data);
int port = sp - priv->ports;
struct sk_buff *skb;
while ((skb = skb_dequeue(&sp->xmit_queue)) != NULL) {
struct sk_buff *clone = DSA_SKB_CB(skb)->clone;
mutex_lock(&priv->mgmt_lock);
sja1105_mgmt_xmit(priv->ds, port, 0, skb, !!clone);
/* The clone, if there, was made by dsa_skb_tx_timestamp */
if (clone)
sja1105_ptp_txtstamp_skb(priv->ds, port, clone);
mutex_unlock(&priv->mgmt_lock);
}
}
/* 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, SJA1105_AGEING_TIME);
}
static int sja1105_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
{
struct sja1105_l2_policing_entry *policing;
struct sja1105_private *priv = ds->priv;
new_mtu += VLAN_ETH_HLEN + ETH_FCS_LEN;
if (dsa_is_cpu_port(ds, port))
new_mtu += VLAN_HLEN;
policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
if (policing[port].maxlen == new_mtu)
return 0;
policing[port].maxlen = new_mtu;
return sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
}
static int sja1105_get_max_mtu(struct dsa_switch *ds, int port)
{
return 2043 - VLAN_ETH_HLEN - ETH_FCS_LEN;
}
static int sja1105_port_setup_tc(struct dsa_switch *ds, int port,
enum tc_setup_type type,
void *type_data)
{
switch (type) {
case TC_SETUP_QDISC_TAPRIO:
return sja1105_setup_tc_taprio(ds, port, type_data);
default:
return -EOPNOTSUPP;
}
}
/* We have a single mirror (@to) port, but can configure ingress and egress
* mirroring on all other (@from) ports.
* We need to allow mirroring rules only as long as the @to port is always the
* same, and we need to unset the @to port from mirr_port only when there is no
* mirroring rule that references it.
*/
static int sja1105_mirror_apply(struct sja1105_private *priv, int from, int to,
bool ingress, bool enabled)
{
struct sja1105_general_params_entry *general_params;
struct sja1105_mac_config_entry *mac;
struct sja1105_table *table;
bool already_enabled;
u64 new_mirr_port;
int rc;
table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
general_params = table->entries;
mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
already_enabled = (general_params->mirr_port != SJA1105_NUM_PORTS);
if (already_enabled && enabled && general_params->mirr_port != to) {
dev_err(priv->ds->dev,
"Delete mirroring rules towards port %llu first\n",
general_params->mirr_port);
return -EBUSY;
}
new_mirr_port = to;
if (!enabled) {
bool keep = false;
int port;
/* Anybody still referencing mirr_port? */
for (port = 0; port < SJA1105_NUM_PORTS; port++) {
if (mac[port].ing_mirr || mac[port].egr_mirr) {
keep = true;
break;
}
}
/* Unset already_enabled for next time */
if (!keep)
new_mirr_port = SJA1105_NUM_PORTS;
}
if (new_mirr_port != general_params->mirr_port) {
general_params->mirr_port = new_mirr_port;
rc = sja1105_dynamic_config_write(priv, BLK_IDX_GENERAL_PARAMS,
0, general_params, true);
if (rc < 0)
return rc;
}
if (ingress)
mac[from].ing_mirr = enabled;
else
mac[from].egr_mirr = enabled;
return sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, from,
&mac[from], true);
}
static int sja1105_mirror_add(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror,
bool ingress)
{
return sja1105_mirror_apply(ds->priv, port, mirror->to_local_port,
ingress, true);
}
static void sja1105_mirror_del(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror)
{
sja1105_mirror_apply(ds->priv, port, mirror->to_local_port,
mirror->ingress, false);
}
static int sja1105_port_policer_add(struct dsa_switch *ds, int port,
struct dsa_mall_policer_tc_entry *policer)
{
struct sja1105_l2_policing_entry *policing;
struct sja1105_private *priv = ds->priv;
policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
/* In hardware, every 8 microseconds the credit level is incremented by
* the value of RATE bytes divided by 64, up to a maximum of SMAX
* bytes.
*/
policing[port].rate = div_u64(512 * policer->rate_bytes_per_sec,
1000000);
policing[port].smax = div_u64(policer->rate_bytes_per_sec *
PSCHED_NS2TICKS(policer->burst),
PSCHED_TICKS_PER_SEC);
return sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
}
static void sja1105_port_policer_del(struct dsa_switch *ds, int port)
{
struct sja1105_l2_policing_entry *policing;
struct sja1105_private *priv = ds->priv;
policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
policing[port].rate = SJA1105_RATE_MBPS(1000);
policing[port].smax = 65535;
sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
}
static const struct dsa_switch_ops sja1105_switch_ops = {
.get_tag_protocol = sja1105_get_tag_protocol,
.setup = sja1105_setup,
.teardown = sja1105_teardown,
.set_ageing_time = sja1105_set_ageing_time,
.port_change_mtu = sja1105_change_mtu,
.port_max_mtu = sja1105_get_max_mtu,
.phylink_validate = sja1105_phylink_validate,
.phylink_mac_link_state = sja1105_mac_pcs_get_state,
.phylink_mac_config = sja1105_mac_config,
.phylink_mac_link_up = sja1105_mac_link_up,
.phylink_mac_link_down = sja1105_mac_link_down,
.get_strings = sja1105_get_strings,
.get_ethtool_stats = sja1105_get_ethtool_stats,
.get_sset_count = sja1105_get_sset_count,
.get_ts_info = sja1105_get_ts_info,
.port_enable = sja1105_port_enable,
.port_disable = sja1105_port_disable,
.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_hwtstamp_get = sja1105_hwtstamp_get,
.port_hwtstamp_set = sja1105_hwtstamp_set,
.port_rxtstamp = sja1105_port_rxtstamp,
.port_txtstamp = sja1105_port_txtstamp,
.port_setup_tc = sja1105_port_setup_tc,
.port_mirror_add = sja1105_mirror_add,
.port_mirror_del = sja1105_mirror_del,
.port_policer_add = sja1105_port_policer_add,
.port_policer_del = sja1105_port_policer_del,
.cls_flower_add = sja1105_cls_flower_add,
.cls_flower_del = sja1105_cls_flower_del,
.cls_flower_stats = sja1105_cls_flower_stats,
.crosschip_bridge_join = sja1105_crosschip_bridge_join,
.crosschip_bridge_leave = sja1105_crosschip_bridge_leave,
.devlink_param_get = sja1105_devlink_param_get,
.devlink_param_set = sja1105_devlink_param_set,
};
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;
u32 device_id;
u64 part_no;
int rc;
rc = sja1105_xfer_u32(priv, SPI_READ, regs->device_id, &device_id,
NULL);
if (rc < 0)
return rc;
if (device_id != priv->info->device_id) {
dev_err(dev, "Expected device ID 0x%llx but read 0x%x\n",
priv->info->device_id, device_id);
return -ENODEV;
}
rc = sja1105_xfer_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 sja1105_tagger_data *tagger_data;
struct device *dev = &spi->dev;
struct sja1105_private *priv;
struct dsa_switch *ds;
int rc, port;
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 = devm_kzalloc(dev, sizeof(*ds), GFP_KERNEL);
if (!ds)
return -ENOMEM;
ds->dev = dev;
ds->num_ports = SJA1105_NUM_PORTS;
ds->ops = &sja1105_switch_ops;
ds->priv = priv;
priv->ds = ds;
tagger_data = &priv->tagger_data;
mutex_init(&priv->ptp_data.lock);
mutex_init(&priv->mgmt_lock);
INIT_LIST_HEAD(&priv->crosschip_links);
INIT_LIST_HEAD(&priv->bridge_vlans);
INIT_LIST_HEAD(&priv->dsa_8021q_vlans);
sja1105_tas_setup(ds);
sja1105_flower_setup(ds);
rc = dsa_register_switch(priv->ds);
if (rc)
return rc;
/* Connections between dsa_port and sja1105_port */
for (port = 0; port < SJA1105_NUM_PORTS; port++) {
struct sja1105_port *sp = &priv->ports[port];
struct dsa_port *dp = dsa_to_port(ds, port);
struct net_device *slave;
int subvlan;
if (!dsa_is_user_port(ds, port))
continue;
dp->priv = sp;
sp->dp = dp;
sp->data = tagger_data;
slave = dp->slave;
kthread_init_work(&sp->xmit_work, sja1105_port_deferred_xmit);
sp->xmit_worker = kthread_create_worker(0, "%s_xmit",
slave->name);
if (IS_ERR(sp->xmit_worker)) {
rc = PTR_ERR(sp->xmit_worker);
dev_err(ds->dev,
"failed to create deferred xmit thread: %d\n",
rc);
goto out;
}
skb_queue_head_init(&sp->xmit_queue);
sp->xmit_tpid = ETH_P_SJA1105;
for (subvlan = 0; subvlan < DSA_8021Q_N_SUBVLAN; subvlan++)
sp->subvlan_map[subvlan] = VLAN_N_VID;
}
return 0;
out:
while (port-- > 0) {
struct sja1105_port *sp = &priv->ports[port];
if (!dsa_is_user_port(ds, port))
continue;
kthread_destroy_worker(sp->xmit_worker);
}
return rc;
}
static int sja1105_remove(struct spi_device *spi)
{
struct sja1105_private *priv = spi_get_drvdata(spi);
dsa_unregister_switch(priv->ds);
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");
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