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linuxdebug/drivers/net/ethernet/microchip/lan966x/lan966x_main.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0+
#include <linux/module.h>
#include <linux/if_bridge.h>
#include <linux/if_vlan.h>
#include <linux/iopoll.h>
#include <linux/ip.h>
#include <linux/of_platform.h>
#include <linux/of_net.h>
#include <linux/packing.h>
#include <linux/phy/phy.h>
#include <linux/reset.h>
#include <net/addrconf.h>
#include "lan966x_main.h"
#define XTR_EOF_0 0x00000080U
#define XTR_EOF_1 0x01000080U
#define XTR_EOF_2 0x02000080U
#define XTR_EOF_3 0x03000080U
#define XTR_PRUNED 0x04000080U
#define XTR_ABORT 0x05000080U
#define XTR_ESCAPE 0x06000080U
#define XTR_NOT_READY 0x07000080U
#define XTR_VALID_BYTES(x) (4 - (((x) >> 24) & 3))
#define IO_RANGES 2
static const struct of_device_id lan966x_match[] = {
{ .compatible = "microchip,lan966x-switch" },
{ }
};
MODULE_DEVICE_TABLE(of, lan966x_match);
struct lan966x_main_io_resource {
enum lan966x_target id;
phys_addr_t offset;
int range;
};
static const struct lan966x_main_io_resource lan966x_main_iomap[] = {
{ TARGET_CPU, 0xc0000, 0 }, /* 0xe00c0000 */
{ TARGET_FDMA, 0xc0400, 0 }, /* 0xe00c0400 */
{ TARGET_ORG, 0, 1 }, /* 0xe2000000 */
{ TARGET_GCB, 0x4000, 1 }, /* 0xe2004000 */
{ TARGET_QS, 0x8000, 1 }, /* 0xe2008000 */
{ TARGET_PTP, 0xc000, 1 }, /* 0xe200c000 */
{ TARGET_CHIP_TOP, 0x10000, 1 }, /* 0xe2010000 */
{ TARGET_REW, 0x14000, 1 }, /* 0xe2014000 */
{ TARGET_SYS, 0x28000, 1 }, /* 0xe2028000 */
{ TARGET_DEV, 0x34000, 1 }, /* 0xe2034000 */
{ TARGET_DEV + 1, 0x38000, 1 }, /* 0xe2038000 */
{ TARGET_DEV + 2, 0x3c000, 1 }, /* 0xe203c000 */
{ TARGET_DEV + 3, 0x40000, 1 }, /* 0xe2040000 */
{ TARGET_DEV + 4, 0x44000, 1 }, /* 0xe2044000 */
{ TARGET_DEV + 5, 0x48000, 1 }, /* 0xe2048000 */
{ TARGET_DEV + 6, 0x4c000, 1 }, /* 0xe204c000 */
{ TARGET_DEV + 7, 0x50000, 1 }, /* 0xe2050000 */
{ TARGET_QSYS, 0x100000, 1 }, /* 0xe2100000 */
{ TARGET_AFI, 0x120000, 1 }, /* 0xe2120000 */
{ TARGET_ANA, 0x140000, 1 }, /* 0xe2140000 */
};
static int lan966x_create_targets(struct platform_device *pdev,
struct lan966x *lan966x)
{
struct resource *iores[IO_RANGES];
void __iomem *begin[IO_RANGES];
int idx;
/* Initially map the entire range and after that update each target to
* point inside the region at the correct offset. It is possible that
* other devices access the same region so don't add any checks about
* this.
*/
for (idx = 0; idx < IO_RANGES; idx++) {
iores[idx] = platform_get_resource(pdev, IORESOURCE_MEM,
idx);
if (!iores[idx]) {
dev_err(&pdev->dev, "Invalid resource\n");
return -EINVAL;
}
begin[idx] = devm_ioremap(&pdev->dev,
iores[idx]->start,
resource_size(iores[idx]));
if (!begin[idx]) {
dev_err(&pdev->dev, "Unable to get registers: %s\n",
iores[idx]->name);
return -ENOMEM;
}
}
for (idx = 0; idx < ARRAY_SIZE(lan966x_main_iomap); idx++) {
const struct lan966x_main_io_resource *iomap =
&lan966x_main_iomap[idx];
lan966x->regs[iomap->id] = begin[iomap->range] + iomap->offset;
}
return 0;
}
static bool lan966x_port_unique_address(struct net_device *dev)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
int p;
for (p = 0; p < lan966x->num_phys_ports; ++p) {
port = lan966x->ports[p];
if (!port || port->dev == dev)
continue;
if (ether_addr_equal(dev->dev_addr, port->dev->dev_addr))
return false;
}
return true;
}
static int lan966x_port_set_mac_address(struct net_device *dev, void *p)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
const struct sockaddr *addr = p;
int ret;
if (ether_addr_equal(addr->sa_data, dev->dev_addr))
return 0;
/* Learn the new net device MAC address in the mac table. */
ret = lan966x_mac_cpu_learn(lan966x, addr->sa_data, HOST_PVID);
if (ret)
return ret;
/* If there is another port with the same address as the dev, then don't
* delete it from the MAC table
*/
if (!lan966x_port_unique_address(dev))
goto out;
/* Then forget the previous one. */
ret = lan966x_mac_cpu_forget(lan966x, dev->dev_addr, HOST_PVID);
if (ret)
return ret;
out:
eth_hw_addr_set(dev, addr->sa_data);
return ret;
}
static int lan966x_port_get_phys_port_name(struct net_device *dev,
char *buf, size_t len)
{
struct lan966x_port *port = netdev_priv(dev);
int ret;
ret = snprintf(buf, len, "p%d", port->chip_port);
if (ret >= len)
return -EINVAL;
return 0;
}
static int lan966x_port_open(struct net_device *dev)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
int err;
/* Enable receiving frames on the port, and activate auto-learning of
* MAC addresses.
*/
lan_rmw(ANA_PORT_CFG_LEARNAUTO_SET(1) |
ANA_PORT_CFG_RECV_ENA_SET(1) |
ANA_PORT_CFG_PORTID_VAL_SET(port->chip_port),
ANA_PORT_CFG_LEARNAUTO |
ANA_PORT_CFG_RECV_ENA |
ANA_PORT_CFG_PORTID_VAL,
lan966x, ANA_PORT_CFG(port->chip_port));
err = phylink_fwnode_phy_connect(port->phylink, port->fwnode, 0);
if (err) {
netdev_err(dev, "Could not attach to PHY\n");
return err;
}
phylink_start(port->phylink);
return 0;
}
static int lan966x_port_stop(struct net_device *dev)
{
struct lan966x_port *port = netdev_priv(dev);
lan966x_port_config_down(port);
phylink_stop(port->phylink);
phylink_disconnect_phy(port->phylink);
return 0;
}
static int lan966x_port_inj_status(struct lan966x *lan966x)
{
return lan_rd(lan966x, QS_INJ_STATUS);
}
static int lan966x_port_inj_ready(struct lan966x *lan966x, u8 grp)
{
u32 val;
if (lan_rd(lan966x, QS_INJ_STATUS) & QS_INJ_STATUS_FIFO_RDY_SET(BIT(grp)))
return 0;
return readx_poll_timeout_atomic(lan966x_port_inj_status, lan966x, val,
QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp),
READL_SLEEP_US, READL_TIMEOUT_US);
}
static int lan966x_port_ifh_xmit(struct sk_buff *skb,
__be32 *ifh,
struct net_device *dev)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
u32 i, count, last;
u8 grp = 0;
u32 val;
int err;
val = lan_rd(lan966x, QS_INJ_STATUS);
if (!(QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp)) ||
(QS_INJ_STATUS_WMARK_REACHED_GET(val) & BIT(grp)))
goto err;
/* Write start of frame */
lan_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) |
QS_INJ_CTRL_SOF_SET(1),
lan966x, QS_INJ_CTRL(grp));
/* Write IFH header */
for (i = 0; i < IFH_LEN; ++i) {
/* Wait until the fifo is ready */
err = lan966x_port_inj_ready(lan966x, grp);
if (err)
goto err;
lan_wr((__force u32)ifh[i], lan966x, QS_INJ_WR(grp));
}
/* Write frame */
count = DIV_ROUND_UP(skb->len, 4);
last = skb->len % 4;
for (i = 0; i < count; ++i) {
/* Wait until the fifo is ready */
err = lan966x_port_inj_ready(lan966x, grp);
if (err)
goto err;
lan_wr(((u32 *)skb->data)[i], lan966x, QS_INJ_WR(grp));
}
/* Add padding */
while (i < (LAN966X_BUFFER_MIN_SZ / 4)) {
/* Wait until the fifo is ready */
err = lan966x_port_inj_ready(lan966x, grp);
if (err)
goto err;
lan_wr(0, lan966x, QS_INJ_WR(grp));
++i;
}
/* Inidcate EOF and valid bytes in the last word */
lan_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) |
QS_INJ_CTRL_VLD_BYTES_SET(skb->len < LAN966X_BUFFER_MIN_SZ ?
0 : last) |
QS_INJ_CTRL_EOF_SET(1),
lan966x, QS_INJ_CTRL(grp));
/* Add dummy CRC */
lan_wr(0, lan966x, QS_INJ_WR(grp));
skb_tx_timestamp(skb);
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP)
return NETDEV_TX_OK;
dev_consume_skb_any(skb);
return NETDEV_TX_OK;
err:
if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP)
lan966x_ptp_txtstamp_release(port, skb);
return NETDEV_TX_BUSY;
}
static void lan966x_ifh_set_bypass(void *ifh, u64 bypass)
{
packing(ifh, &bypass, IFH_POS_BYPASS + IFH_WID_BYPASS - 1,
IFH_POS_BYPASS, IFH_LEN * 4, PACK, 0);
}
static void lan966x_ifh_set_port(void *ifh, u64 bypass)
{
packing(ifh, &bypass, IFH_POS_DSTS + IFH_WID_DSTS - 1,
IFH_POS_DSTS, IFH_LEN * 4, PACK, 0);
}
static void lan966x_ifh_set_qos_class(void *ifh, u64 bypass)
{
packing(ifh, &bypass, IFH_POS_QOS_CLASS + IFH_WID_QOS_CLASS - 1,
IFH_POS_QOS_CLASS, IFH_LEN * 4, PACK, 0);
}
static void lan966x_ifh_set_ipv(void *ifh, u64 bypass)
{
packing(ifh, &bypass, IFH_POS_IPV + IFH_WID_IPV - 1,
IFH_POS_IPV, IFH_LEN * 4, PACK, 0);
}
static void lan966x_ifh_set_vid(void *ifh, u64 vid)
{
packing(ifh, &vid, IFH_POS_TCI + IFH_WID_TCI - 1,
IFH_POS_TCI, IFH_LEN * 4, PACK, 0);
}
static void lan966x_ifh_set_rew_op(void *ifh, u64 rew_op)
{
packing(ifh, &rew_op, IFH_POS_REW_CMD + IFH_WID_REW_CMD - 1,
IFH_POS_REW_CMD, IFH_LEN * 4, PACK, 0);
}
static void lan966x_ifh_set_timestamp(void *ifh, u64 timestamp)
{
packing(ifh, &timestamp, IFH_POS_TIMESTAMP + IFH_WID_TIMESTAMP - 1,
IFH_POS_TIMESTAMP, IFH_LEN * 4, PACK, 0);
}
static netdev_tx_t lan966x_port_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
__be32 ifh[IFH_LEN];
int err;
memset(ifh, 0x0, sizeof(__be32) * IFH_LEN);
lan966x_ifh_set_bypass(ifh, 1);
lan966x_ifh_set_port(ifh, BIT_ULL(port->chip_port));
lan966x_ifh_set_qos_class(ifh, skb->priority >= 7 ? 0x7 : skb->priority);
lan966x_ifh_set_ipv(ifh, skb->priority >= 7 ? 0x7 : skb->priority);
lan966x_ifh_set_vid(ifh, skb_vlan_tag_get(skb));
if (port->lan966x->ptp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) {
err = lan966x_ptp_txtstamp_request(port, skb);
if (err)
return err;
lan966x_ifh_set_rew_op(ifh, LAN966X_SKB_CB(skb)->rew_op);
lan966x_ifh_set_timestamp(ifh, LAN966X_SKB_CB(skb)->ts_id);
}
spin_lock(&lan966x->tx_lock);
if (port->lan966x->fdma)
err = lan966x_fdma_xmit(skb, ifh, dev);
else
err = lan966x_port_ifh_xmit(skb, ifh, dev);
spin_unlock(&lan966x->tx_lock);
return err;
}
static int lan966x_port_change_mtu(struct net_device *dev, int new_mtu)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
int old_mtu = dev->mtu;
int err;
lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(LAN966X_HW_MTU(new_mtu)),
lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port));
dev->mtu = new_mtu;
if (!lan966x->fdma)
return 0;
err = lan966x_fdma_change_mtu(lan966x);
if (err) {
lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(LAN966X_HW_MTU(old_mtu)),
lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port));
dev->mtu = old_mtu;
}
return err;
}
static int lan966x_mc_unsync(struct net_device *dev, const unsigned char *addr)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
return lan966x_mac_forget(lan966x, addr, HOST_PVID, ENTRYTYPE_LOCKED);
}
static int lan966x_mc_sync(struct net_device *dev, const unsigned char *addr)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
return lan966x_mac_cpu_learn(lan966x, addr, HOST_PVID);
}
static void lan966x_port_set_rx_mode(struct net_device *dev)
{
__dev_mc_sync(dev, lan966x_mc_sync, lan966x_mc_unsync);
}
static int lan966x_port_get_parent_id(struct net_device *dev,
struct netdev_phys_item_id *ppid)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
ppid->id_len = sizeof(lan966x->base_mac);
memcpy(&ppid->id, &lan966x->base_mac, ppid->id_len);
return 0;
}
static int lan966x_port_ioctl(struct net_device *dev, struct ifreq *ifr,
int cmd)
{
struct lan966x_port *port = netdev_priv(dev);
if (!phy_has_hwtstamp(dev->phydev) && port->lan966x->ptp) {
switch (cmd) {
case SIOCSHWTSTAMP:
return lan966x_ptp_hwtstamp_set(port, ifr);
case SIOCGHWTSTAMP:
return lan966x_ptp_hwtstamp_get(port, ifr);
}
}
if (!dev->phydev)
return -ENODEV;
return phy_mii_ioctl(dev->phydev, ifr, cmd);
}
static const struct net_device_ops lan966x_port_netdev_ops = {
.ndo_open = lan966x_port_open,
.ndo_stop = lan966x_port_stop,
.ndo_start_xmit = lan966x_port_xmit,
.ndo_change_mtu = lan966x_port_change_mtu,
.ndo_set_rx_mode = lan966x_port_set_rx_mode,
.ndo_get_phys_port_name = lan966x_port_get_phys_port_name,
.ndo_get_stats64 = lan966x_stats_get,
.ndo_set_mac_address = lan966x_port_set_mac_address,
.ndo_get_port_parent_id = lan966x_port_get_parent_id,
.ndo_eth_ioctl = lan966x_port_ioctl,
.ndo_setup_tc = lan966x_tc_setup,
};
bool lan966x_netdevice_check(const struct net_device *dev)
{
return dev->netdev_ops == &lan966x_port_netdev_ops;
}
bool lan966x_hw_offload(struct lan966x *lan966x, u32 port, struct sk_buff *skb)
{
u32 val;
/* The IGMP and MLD frames are not forward by the HW if
* multicast snooping is enabled, therefor don't mark as
* offload to allow the SW to forward the frames accordingly.
*/
val = lan_rd(lan966x, ANA_CPU_FWD_CFG(port));
if (!(val & (ANA_CPU_FWD_CFG_IGMP_REDIR_ENA |
ANA_CPU_FWD_CFG_MLD_REDIR_ENA)))
return true;
if (eth_type_vlan(skb->protocol)) {
skb = skb_vlan_untag(skb);
if (unlikely(!skb))
return false;
}
if (skb->protocol == htons(ETH_P_IP) &&
ip_hdr(skb)->protocol == IPPROTO_IGMP)
return false;
if (IS_ENABLED(CONFIG_IPV6) &&
skb->protocol == htons(ETH_P_IPV6) &&
ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) &&
!ipv6_mc_check_mld(skb))
return false;
return true;
}
static int lan966x_port_xtr_status(struct lan966x *lan966x, u8 grp)
{
return lan_rd(lan966x, QS_XTR_RD(grp));
}
static int lan966x_port_xtr_ready(struct lan966x *lan966x, u8 grp)
{
u32 val;
return read_poll_timeout(lan966x_port_xtr_status, val,
val != XTR_NOT_READY,
READL_SLEEP_US, READL_TIMEOUT_US, false,
lan966x, grp);
}
static int lan966x_rx_frame_word(struct lan966x *lan966x, u8 grp, u32 *rval)
{
u32 bytes_valid;
u32 val;
int err;
val = lan_rd(lan966x, QS_XTR_RD(grp));
if (val == XTR_NOT_READY) {
err = lan966x_port_xtr_ready(lan966x, grp);
if (err)
return -EIO;
}
switch (val) {
case XTR_ABORT:
return -EIO;
case XTR_EOF_0:
case XTR_EOF_1:
case XTR_EOF_2:
case XTR_EOF_3:
case XTR_PRUNED:
bytes_valid = XTR_VALID_BYTES(val);
val = lan_rd(lan966x, QS_XTR_RD(grp));
if (val == XTR_ESCAPE)
*rval = lan_rd(lan966x, QS_XTR_RD(grp));
else
*rval = val;
return bytes_valid;
case XTR_ESCAPE:
*rval = lan_rd(lan966x, QS_XTR_RD(grp));
return 4;
default:
*rval = val;
return 4;
}
}
void lan966x_ifh_get_src_port(void *ifh, u64 *src_port)
{
packing(ifh, src_port, IFH_POS_SRCPORT + IFH_WID_SRCPORT - 1,
IFH_POS_SRCPORT, IFH_LEN * 4, UNPACK, 0);
}
static void lan966x_ifh_get_len(void *ifh, u64 *len)
{
packing(ifh, len, IFH_POS_LEN + IFH_WID_LEN - 1,
IFH_POS_LEN, IFH_LEN * 4, UNPACK, 0);
}
void lan966x_ifh_get_timestamp(void *ifh, u64 *timestamp)
{
packing(ifh, timestamp, IFH_POS_TIMESTAMP + IFH_WID_TIMESTAMP - 1,
IFH_POS_TIMESTAMP, IFH_LEN * 4, UNPACK, 0);
}
static irqreturn_t lan966x_xtr_irq_handler(int irq, void *args)
{
struct lan966x *lan966x = args;
int i, grp = 0, err = 0;
if (!(lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp)))
return IRQ_NONE;
do {
u64 src_port, len, timestamp;
struct net_device *dev;
struct sk_buff *skb;
int sz = 0, buf_len;
u32 ifh[IFH_LEN];
u32 *buf;
u32 val;
for (i = 0; i < IFH_LEN; i++) {
err = lan966x_rx_frame_word(lan966x, grp, &ifh[i]);
if (err != 4)
goto recover;
}
err = 0;
lan966x_ifh_get_src_port(ifh, &src_port);
lan966x_ifh_get_len(ifh, &len);
lan966x_ifh_get_timestamp(ifh, &timestamp);
WARN_ON(src_port >= lan966x->num_phys_ports);
dev = lan966x->ports[src_port]->dev;
skb = netdev_alloc_skb(dev, len);
if (unlikely(!skb)) {
netdev_err(dev, "Unable to allocate sk_buff\n");
err = -ENOMEM;
break;
}
buf_len = len - ETH_FCS_LEN;
buf = (u32 *)skb_put(skb, buf_len);
len = 0;
do {
sz = lan966x_rx_frame_word(lan966x, grp, &val);
if (sz < 0) {
kfree_skb(skb);
goto recover;
}
*buf++ = val;
len += sz;
} while (len < buf_len);
/* Read the FCS */
sz = lan966x_rx_frame_word(lan966x, grp, &val);
if (sz < 0) {
kfree_skb(skb);
goto recover;
}
/* Update the statistics if part of the FCS was read before */
len -= ETH_FCS_LEN - sz;
if (unlikely(dev->features & NETIF_F_RXFCS)) {
buf = (u32 *)skb_put(skb, ETH_FCS_LEN);
*buf = val;
}
lan966x_ptp_rxtstamp(lan966x, skb, timestamp);
skb->protocol = eth_type_trans(skb, dev);
if (lan966x->bridge_mask & BIT(src_port)) {
skb->offload_fwd_mark = 1;
skb_reset_network_header(skb);
if (!lan966x_hw_offload(lan966x, src_port, skb))
skb->offload_fwd_mark = 0;
}
if (!skb_defer_rx_timestamp(skb))
netif_rx(skb);
dev->stats.rx_bytes += len;
dev->stats.rx_packets++;
recover:
if (sz < 0 || err)
lan_rd(lan966x, QS_XTR_RD(grp));
} while (lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp));
return IRQ_HANDLED;
}
static irqreturn_t lan966x_ana_irq_handler(int irq, void *args)
{
struct lan966x *lan966x = args;
return lan966x_mac_irq_handler(lan966x);
}
static void lan966x_cleanup_ports(struct lan966x *lan966x)
{
struct lan966x_port *port;
int p;
for (p = 0; p < lan966x->num_phys_ports; p++) {
port = lan966x->ports[p];
if (!port)
continue;
if (port->dev)
unregister_netdev(port->dev);
if (lan966x->fdma && lan966x->fdma_ndev == port->dev)
lan966x_fdma_netdev_deinit(lan966x, port->dev);
if (port->phylink) {
rtnl_lock();
lan966x_port_stop(port->dev);
rtnl_unlock();
phylink_destroy(port->phylink);
port->phylink = NULL;
}
if (port->fwnode)
fwnode_handle_put(port->fwnode);
}
disable_irq(lan966x->xtr_irq);
lan966x->xtr_irq = -ENXIO;
if (lan966x->ana_irq > 0) {
disable_irq(lan966x->ana_irq);
lan966x->ana_irq = -ENXIO;
}
if (lan966x->fdma)
devm_free_irq(lan966x->dev, lan966x->fdma_irq, lan966x);
if (lan966x->ptp_irq > 0)
devm_free_irq(lan966x->dev, lan966x->ptp_irq, lan966x);
if (lan966x->ptp_ext_irq > 0)
devm_free_irq(lan966x->dev, lan966x->ptp_ext_irq, lan966x);
}
static int lan966x_probe_port(struct lan966x *lan966x, u32 p,
phy_interface_t phy_mode,
struct fwnode_handle *portnp)
{
struct lan966x_port *port;
struct phylink *phylink;
struct net_device *dev;
int err;
if (p >= lan966x->num_phys_ports)
return -EINVAL;
dev = devm_alloc_etherdev_mqs(lan966x->dev,
sizeof(struct lan966x_port),
NUM_PRIO_QUEUES, 1);
if (!dev)
return -ENOMEM;
SET_NETDEV_DEV(dev, lan966x->dev);
port = netdev_priv(dev);
port->dev = dev;
port->lan966x = lan966x;
port->chip_port = p;
lan966x->ports[p] = port;
dev->max_mtu = ETH_MAX_MTU;
dev->netdev_ops = &lan966x_port_netdev_ops;
dev->ethtool_ops = &lan966x_ethtool_ops;
dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX |
NETIF_F_HW_TC;
dev->hw_features |= NETIF_F_HW_TC;
dev->needed_headroom = IFH_LEN * sizeof(u32);
eth_hw_addr_gen(dev, lan966x->base_mac, p + 1);
lan966x_mac_learn(lan966x, PGID_CPU, dev->dev_addr, HOST_PVID,
ENTRYTYPE_LOCKED);
port->phylink_config.dev = &port->dev->dev;
port->phylink_config.type = PHYLINK_NETDEV;
port->phylink_pcs.poll = true;
port->phylink_pcs.ops = &lan966x_phylink_pcs_ops;
port->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
MAC_10 | MAC_100 | MAC_1000FD | MAC_2500FD;
phy_interface_set_rgmii(port->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_MII,
port->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_GMII,
port->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_SGMII,
port->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_QSGMII,
port->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_QUSGMII,
port->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_1000BASEX,
port->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_2500BASEX,
port->phylink_config.supported_interfaces);
phylink = phylink_create(&port->phylink_config,
portnp,
phy_mode,
&lan966x_phylink_mac_ops);
if (IS_ERR(phylink)) {
port->dev = NULL;
return PTR_ERR(phylink);
}
port->phylink = phylink;
err = register_netdev(dev);
if (err) {
dev_err(lan966x->dev, "register_netdev failed\n");
return err;
}
lan966x_vlan_port_set_vlan_aware(port, 0);
lan966x_vlan_port_set_vid(port, HOST_PVID, false, false);
lan966x_vlan_port_apply(port);
return 0;
}
static void lan966x_init(struct lan966x *lan966x)
{
u32 p, i;
/* MAC table initialization */
lan966x_mac_init(lan966x);
lan966x_vlan_init(lan966x);
/* Flush queues */
lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) |
GENMASK(1, 0),
lan966x, QS_XTR_FLUSH);
/* Allow to drain */
mdelay(1);
/* All Queues normal */
lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) &
~(GENMASK(1, 0)),
lan966x, QS_XTR_FLUSH);
/* Set MAC age time to default value, the entry is aged after
* 2 * AGE_PERIOD
*/
lan_wr(ANA_AUTOAGE_AGE_PERIOD_SET(BR_DEFAULT_AGEING_TIME / 2 / HZ),
lan966x, ANA_AUTOAGE);
/* Disable learning for frames discarded by VLAN ingress filtering */
lan_rmw(ANA_ADVLEARN_VLAN_CHK_SET(1),
ANA_ADVLEARN_VLAN_CHK,
lan966x, ANA_ADVLEARN);
/* Setup frame ageing - "2 sec" - The unit is 6.5 us on lan966x */
lan_wr(SYS_FRM_AGING_AGE_TX_ENA_SET(1) |
(20000000 / 65),
lan966x, SYS_FRM_AGING);
/* Map the 8 CPU extraction queues to CPU port */
lan_wr(0, lan966x, QSYS_CPU_GROUP_MAP);
/* Do byte-swap and expect status after last data word
* Extraction: Mode: manual extraction) | Byte_swap
*/
lan_wr(QS_XTR_GRP_CFG_MODE_SET(lan966x->fdma ? 2 : 1) |
QS_XTR_GRP_CFG_BYTE_SWAP_SET(1),
lan966x, QS_XTR_GRP_CFG(0));
/* Injection: Mode: manual injection | Byte_swap */
lan_wr(QS_INJ_GRP_CFG_MODE_SET(lan966x->fdma ? 2 : 1) |
QS_INJ_GRP_CFG_BYTE_SWAP_SET(1),
lan966x, QS_INJ_GRP_CFG(0));
lan_rmw(QS_INJ_CTRL_GAP_SIZE_SET(0),
QS_INJ_CTRL_GAP_SIZE,
lan966x, QS_INJ_CTRL(0));
/* Enable IFH insertion/parsing on CPU ports */
lan_wr(SYS_PORT_MODE_INCL_INJ_HDR_SET(1) |
SYS_PORT_MODE_INCL_XTR_HDR_SET(1),
lan966x, SYS_PORT_MODE(CPU_PORT));
/* Setup flooding PGIDs */
lan_wr(ANA_FLOODING_IPMC_FLD_MC4_DATA_SET(PGID_MCIPV4) |
ANA_FLOODING_IPMC_FLD_MC4_CTRL_SET(PGID_MC) |
ANA_FLOODING_IPMC_FLD_MC6_DATA_SET(PGID_MCIPV6) |
ANA_FLOODING_IPMC_FLD_MC6_CTRL_SET(PGID_MC),
lan966x, ANA_FLOODING_IPMC);
/* There are 8 priorities */
for (i = 0; i < 8; ++i)
lan_rmw(ANA_FLOODING_FLD_MULTICAST_SET(PGID_MC) |
ANA_FLOODING_FLD_UNICAST_SET(PGID_UC) |
ANA_FLOODING_FLD_BROADCAST_SET(PGID_BC),
ANA_FLOODING_FLD_MULTICAST |
ANA_FLOODING_FLD_UNICAST |
ANA_FLOODING_FLD_BROADCAST,
lan966x, ANA_FLOODING(i));
for (i = 0; i < PGID_ENTRIES; ++i)
/* Set all the entries to obey VLAN_VLAN */
lan_rmw(ANA_PGID_CFG_OBEY_VLAN_SET(1),
ANA_PGID_CFG_OBEY_VLAN,
lan966x, ANA_PGID_CFG(i));
for (p = 0; p < lan966x->num_phys_ports; p++) {
/* Disable bridging by default */
lan_rmw(ANA_PGID_PGID_SET(0x0),
ANA_PGID_PGID,
lan966x, ANA_PGID(p + PGID_SRC));
/* Do not forward BPDU frames to the front ports and copy them
* to CPU
*/
lan_wr(0xffff, lan966x, ANA_CPU_FWD_BPDU_CFG(p));
}
/* Set source buffer size for each priority and each port to 1500 bytes */
for (i = 0; i <= QSYS_Q_RSRV; ++i) {
lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(i));
lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(512 + i));
}
/* Enable switching to/from cpu port */
lan_wr(QSYS_SW_PORT_MODE_PORT_ENA_SET(1) |
QSYS_SW_PORT_MODE_SCH_NEXT_CFG_SET(1) |
QSYS_SW_PORT_MODE_INGRESS_DROP_MODE_SET(1),
lan966x, QSYS_SW_PORT_MODE(CPU_PORT));
/* Configure and enable the CPU port */
lan_rmw(ANA_PGID_PGID_SET(0),
ANA_PGID_PGID,
lan966x, ANA_PGID(CPU_PORT));
lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT)),
ANA_PGID_PGID,
lan966x, ANA_PGID(PGID_CPU));
/* Multicast to all other ports */
lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0),
ANA_PGID_PGID,
lan966x, ANA_PGID(PGID_MC));
/* This will be controlled by mrouter ports */
lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0),
ANA_PGID_PGID,
lan966x, ANA_PGID(PGID_MCIPV4));
lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0),
ANA_PGID_PGID,
lan966x, ANA_PGID(PGID_MCIPV6));
/* Unicast to all other ports */
lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0),
ANA_PGID_PGID,
lan966x, ANA_PGID(PGID_UC));
/* Broadcast to the CPU port and to other ports */
lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT) | GENMASK(lan966x->num_phys_ports - 1, 0)),
ANA_PGID_PGID,
lan966x, ANA_PGID(PGID_BC));
lan_wr(REW_PORT_CFG_NO_REWRITE_SET(1),
lan966x, REW_PORT_CFG(CPU_PORT));
lan_rmw(ANA_ANAINTR_INTR_ENA_SET(1),
ANA_ANAINTR_INTR_ENA,
lan966x, ANA_ANAINTR);
spin_lock_init(&lan966x->tx_lock);
lan966x_taprio_init(lan966x);
}
static int lan966x_ram_init(struct lan966x *lan966x)
{
return lan_rd(lan966x, SYS_RAM_INIT);
}
static int lan966x_reset_switch(struct lan966x *lan966x)
{
struct reset_control *switch_reset;
int val = 0;
int ret;
switch_reset = devm_reset_control_get_optional_shared(lan966x->dev,
"switch");
if (IS_ERR(switch_reset))
return dev_err_probe(lan966x->dev, PTR_ERR(switch_reset),
"Could not obtain switch reset");
reset_control_reset(switch_reset);
/* Don't reinitialize the switch core, if it is already initialized. In
* case it is initialized twice, some pointers inside the queue system
* in HW will get corrupted and then after a while the queue system gets
* full and no traffic is passing through the switch. The issue is seen
* when loading and unloading the driver and sending traffic through the
* switch.
*/
if (lan_rd(lan966x, SYS_RESET_CFG) & SYS_RESET_CFG_CORE_ENA)
return 0;
lan_wr(SYS_RESET_CFG_CORE_ENA_SET(0), lan966x, SYS_RESET_CFG);
lan_wr(SYS_RAM_INIT_RAM_INIT_SET(1), lan966x, SYS_RAM_INIT);
ret = readx_poll_timeout(lan966x_ram_init, lan966x,
val, (val & BIT(1)) == 0, READL_SLEEP_US,
READL_TIMEOUT_US);
if (ret)
return ret;
lan_wr(SYS_RESET_CFG_CORE_ENA_SET(1), lan966x, SYS_RESET_CFG);
return 0;
}
static int lan966x_probe(struct platform_device *pdev)
{
struct fwnode_handle *ports, *portnp;
struct lan966x *lan966x;
u8 mac_addr[ETH_ALEN];
int err;
lan966x = devm_kzalloc(&pdev->dev, sizeof(*lan966x), GFP_KERNEL);
if (!lan966x)
return -ENOMEM;
platform_set_drvdata(pdev, lan966x);
lan966x->dev = &pdev->dev;
if (!device_get_mac_address(&pdev->dev, mac_addr)) {
ether_addr_copy(lan966x->base_mac, mac_addr);
} else {
pr_info("MAC addr was not set, use random MAC\n");
eth_random_addr(lan966x->base_mac);
lan966x->base_mac[5] &= 0xf0;
}
err = lan966x_create_targets(pdev, lan966x);
if (err)
return dev_err_probe(&pdev->dev, err,
"Failed to create targets");
err = lan966x_reset_switch(lan966x);
if (err)
return dev_err_probe(&pdev->dev, err, "Reset failed");
lan966x->num_phys_ports = NUM_PHYS_PORTS;
lan966x->ports = devm_kcalloc(&pdev->dev, lan966x->num_phys_ports,
sizeof(struct lan966x_port *),
GFP_KERNEL);
if (!lan966x->ports)
return -ENOMEM;
/* There QS system has 32KB of memory */
lan966x->shared_queue_sz = LAN966X_BUFFER_MEMORY;
/* set irq */
lan966x->xtr_irq = platform_get_irq_byname(pdev, "xtr");
if (lan966x->xtr_irq <= 0)
return -EINVAL;
err = devm_request_threaded_irq(&pdev->dev, lan966x->xtr_irq, NULL,
lan966x_xtr_irq_handler, IRQF_ONESHOT,
"frame extraction", lan966x);
if (err) {
pr_err("Unable to use xtr irq");
return -ENODEV;
}
lan966x->ana_irq = platform_get_irq_byname(pdev, "ana");
if (lan966x->ana_irq > 0) {
err = devm_request_threaded_irq(&pdev->dev, lan966x->ana_irq, NULL,
lan966x_ana_irq_handler, IRQF_ONESHOT,
"ana irq", lan966x);
if (err)
return dev_err_probe(&pdev->dev, err, "Unable to use ana irq");
}
lan966x->ptp_irq = platform_get_irq_byname(pdev, "ptp");
if (lan966x->ptp_irq > 0) {
err = devm_request_threaded_irq(&pdev->dev, lan966x->ptp_irq, NULL,
lan966x_ptp_irq_handler, IRQF_ONESHOT,
"ptp irq", lan966x);
if (err)
return dev_err_probe(&pdev->dev, err, "Unable to use ptp irq");
lan966x->ptp = 1;
}
lan966x->fdma_irq = platform_get_irq_byname(pdev, "fdma");
if (lan966x->fdma_irq > 0) {
err = devm_request_irq(&pdev->dev, lan966x->fdma_irq,
lan966x_fdma_irq_handler, 0,
"fdma irq", lan966x);
if (err)
return dev_err_probe(&pdev->dev, err, "Unable to use fdma irq");
lan966x->fdma = true;
}
if (lan966x->ptp) {
lan966x->ptp_ext_irq = platform_get_irq_byname(pdev, "ptp-ext");
if (lan966x->ptp_ext_irq > 0) {
err = devm_request_threaded_irq(&pdev->dev,
lan966x->ptp_ext_irq, NULL,
lan966x_ptp_ext_irq_handler,
IRQF_ONESHOT,
"ptp-ext irq", lan966x);
if (err)
return dev_err_probe(&pdev->dev, err,
"Unable to use ptp-ext irq");
}
}
ports = device_get_named_child_node(&pdev->dev, "ethernet-ports");
if (!ports)
return dev_err_probe(&pdev->dev, -ENODEV,
"no ethernet-ports child found\n");
/* init switch */
lan966x_init(lan966x);
lan966x_stats_init(lan966x);
/* go over the child nodes */
fwnode_for_each_available_child_node(ports, portnp) {
phy_interface_t phy_mode;
struct phy *serdes;
u32 p;
if (fwnode_property_read_u32(portnp, "reg", &p))
continue;
phy_mode = fwnode_get_phy_mode(portnp);
err = lan966x_probe_port(lan966x, p, phy_mode, portnp);
if (err)
goto cleanup_ports;
/* Read needed configuration */
lan966x->ports[p]->config.portmode = phy_mode;
lan966x->ports[p]->fwnode = fwnode_handle_get(portnp);
serdes = devm_of_phy_get(lan966x->dev, to_of_node(portnp), NULL);
if (PTR_ERR(serdes) == -ENODEV)
serdes = NULL;
if (IS_ERR(serdes)) {
err = PTR_ERR(serdes);
goto cleanup_ports;
}
lan966x->ports[p]->serdes = serdes;
lan966x_port_init(lan966x->ports[p]);
}
fwnode_handle_put(ports);
lan966x_mdb_init(lan966x);
err = lan966x_fdb_init(lan966x);
if (err)
goto cleanup_ports;
err = lan966x_ptp_init(lan966x);
if (err)
goto cleanup_fdb;
err = lan966x_fdma_init(lan966x);
if (err)
goto cleanup_ptp;
return 0;
cleanup_ptp:
lan966x_ptp_deinit(lan966x);
cleanup_fdb:
lan966x_fdb_deinit(lan966x);
cleanup_ports:
fwnode_handle_put(ports);
fwnode_handle_put(portnp);
lan966x_cleanup_ports(lan966x);
cancel_delayed_work_sync(&lan966x->stats_work);
destroy_workqueue(lan966x->stats_queue);
mutex_destroy(&lan966x->stats_lock);
return err;
}
static int lan966x_remove(struct platform_device *pdev)
{
struct lan966x *lan966x = platform_get_drvdata(pdev);
lan966x_taprio_deinit(lan966x);
lan966x_fdma_deinit(lan966x);
lan966x_cleanup_ports(lan966x);
cancel_delayed_work_sync(&lan966x->stats_work);
destroy_workqueue(lan966x->stats_queue);
mutex_destroy(&lan966x->stats_lock);
lan966x_mac_purge_entries(lan966x);
lan966x_mdb_deinit(lan966x);
lan966x_fdb_deinit(lan966x);
lan966x_ptp_deinit(lan966x);
return 0;
}
static struct platform_driver lan966x_driver = {
.probe = lan966x_probe,
.remove = lan966x_remove,
.driver = {
.name = "lan966x-switch",
.of_match_table = lan966x_match,
},
};
static int __init lan966x_switch_driver_init(void)
{
int ret;
lan966x_register_notifier_blocks();
ret = platform_driver_register(&lan966x_driver);
if (ret)
goto err;
return 0;
err:
lan966x_unregister_notifier_blocks();
return ret;
}
static void __exit lan966x_switch_driver_exit(void)
{
platform_driver_unregister(&lan966x_driver);
lan966x_unregister_notifier_blocks();
}
module_init(lan966x_switch_driver_init);
module_exit(lan966x_switch_driver_exit);
MODULE_DESCRIPTION("Microchip LAN966X switch driver");
MODULE_AUTHOR("Horatiu Vultur <horatiu.vultur@microchip.com>");
MODULE_LICENSE("Dual MIT/GPL");