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OpenCloudOS-Kernel/drivers/net/ethernet/ti/cpsw.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Texas Instruments Ethernet Switch Driver
*
* Copyright (C) 2012 Texas Instruments
*
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/timer.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/irqreturn.h>
#include <linux/interrupt.h>
#include <linux/if_ether.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/net_tstamp.h>
#include <linux/phy.h>
#include <linux/phy/phy.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/pm_runtime.h>
#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_device.h>
#include <linux/if_vlan.h>
#include <linux/kmemleak.h>
#include <linux/sys_soc.h>
#include <linux/pinctrl/consumer.h>
#include <net/pkt_cls.h>
#include "cpsw.h"
#include "cpsw_ale.h"
#include "cpsw_priv.h"
#include "cpsw_sl.h"
#include "cpts.h"
#include "davinci_cpdma.h"
#include <net/pkt_sched.h>
static int debug_level;
module_param(debug_level, int, 0);
MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
static int ale_ageout = 10;
module_param(ale_ageout, int, 0);
MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
module_param(rx_packet_max, int, 0);
MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
module_param(descs_pool_size, int, 0444);
MODULE_PARM_DESC(descs_pool_size, "Number of CPDMA CPPI descriptors in pool");
#define for_each_slave(priv, func, arg...) \
do { \
struct cpsw_slave *slave; \
struct cpsw_common *cpsw = (priv)->cpsw; \
int n; \
if (cpsw->data.dual_emac) \
(func)((cpsw)->slaves + priv->emac_port, ##arg);\
else \
for (n = cpsw->data.slaves, \
slave = cpsw->slaves; \
n; n--) \
(func)(slave++, ##arg); \
} while (0)
static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
__be16 proto, u16 vid);
static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
{
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
struct cpsw_ale *ale = cpsw->ale;
int i;
if (cpsw->data.dual_emac) {
bool flag = false;
/* Enabling promiscuous mode for one interface will be
* common for both the interface as the interface shares
* the same hardware resource.
*/
for (i = 0; i < cpsw->data.slaves; i++)
if (cpsw->slaves[i].ndev->flags & IFF_PROMISC)
flag = true;
if (!enable && flag) {
enable = true;
dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
}
if (enable) {
/* Enable Bypass */
cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1);
dev_dbg(&ndev->dev, "promiscuity enabled\n");
} else {
/* Disable Bypass */
cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0);
dev_dbg(&ndev->dev, "promiscuity disabled\n");
}
} else {
if (enable) {
unsigned long timeout = jiffies + HZ;
/* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */
for (i = 0; i <= cpsw->data.slaves; i++) {
cpsw_ale_control_set(ale, i,
ALE_PORT_NOLEARN, 1);
cpsw_ale_control_set(ale, i,
ALE_PORT_NO_SA_UPDATE, 1);
}
/* Clear All Untouched entries */
cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
do {
cpu_relax();
if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT))
break;
} while (time_after(timeout, jiffies));
cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
/* Clear all mcast from ALE */
cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, -1);
__hw_addr_ref_unsync_dev(&ndev->mc, ndev, NULL);
/* Flood All Unicast Packets to Host port */
cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);
dev_dbg(&ndev->dev, "promiscuity enabled\n");
} else {
/* Don't Flood All Unicast Packets to Host port */
cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);
/* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */
for (i = 0; i <= cpsw->data.slaves; i++) {
cpsw_ale_control_set(ale, i,
ALE_PORT_NOLEARN, 0);
cpsw_ale_control_set(ale, i,
ALE_PORT_NO_SA_UPDATE, 0);
}
dev_dbg(&ndev->dev, "promiscuity disabled\n");
}
}
}
/**
* cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
* if it's not deleted
* @ndev: device to sync
* @addr: address to be added or deleted
* @vid: vlan id, if vid < 0 set/unset address for real device
* @add: add address if the flag is set or remove otherwise
*/
static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
int vid, int add)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
int mask, flags, ret;
if (vid < 0) {
if (cpsw->data.dual_emac)
vid = cpsw->slaves[priv->emac_port].port_vlan;
else
vid = 0;
}
mask = cpsw->data.dual_emac ? ALE_PORT_HOST : ALE_ALL_PORTS;
flags = vid ? ALE_VLAN : 0;
if (add)
ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0);
else
ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid);
return ret;
}
static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx)
{
struct addr_sync_ctx *sync_ctx = ctx;
struct netdev_hw_addr *ha;
int found = 0, ret = 0;
if (!vdev || !(vdev->flags & IFF_UP))
return 0;
/* vlan address is relevant if its sync_cnt != 0 */
netdev_for_each_mc_addr(ha, vdev) {
if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
found = ha->sync_cnt;
break;
}
}
if (found)
sync_ctx->consumed++;
if (sync_ctx->flush) {
if (!found)
cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
return 0;
}
if (found)
ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1);
return ret;
}
static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num)
{
struct addr_sync_ctx sync_ctx;
int ret;
sync_ctx.consumed = 0;
sync_ctx.addr = addr;
sync_ctx.ndev = ndev;
sync_ctx.flush = 0;
ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
if (sync_ctx.consumed < num && !ret)
ret = cpsw_set_mc(ndev, addr, -1, 1);
return ret;
}
static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num)
{
struct addr_sync_ctx sync_ctx;
sync_ctx.consumed = 0;
sync_ctx.addr = addr;
sync_ctx.ndev = ndev;
sync_ctx.flush = 1;
vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
if (sync_ctx.consumed == num)
cpsw_set_mc(ndev, addr, -1, 0);
return 0;
}
static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx)
{
struct addr_sync_ctx *sync_ctx = ctx;
struct netdev_hw_addr *ha;
int found = 0;
if (!vdev || !(vdev->flags & IFF_UP))
return 0;
/* vlan address is relevant if its sync_cnt != 0 */
netdev_for_each_mc_addr(ha, vdev) {
if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
found = ha->sync_cnt;
break;
}
}
if (!found)
return 0;
sync_ctx->consumed++;
cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
return 0;
}
static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
{
struct addr_sync_ctx sync_ctx;
sync_ctx.addr = addr;
sync_ctx.ndev = ndev;
sync_ctx.consumed = 0;
vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx);
if (sync_ctx.consumed < num)
cpsw_set_mc(ndev, addr, -1, 0);
return 0;
}
static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
int slave_port = -1;
if (cpsw->data.dual_emac)
slave_port = priv->emac_port + 1;
if (ndev->flags & IFF_PROMISC) {
/* Enable promiscuous mode */
cpsw_set_promiscious(ndev, true);
cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, slave_port);
return;
} else {
/* Disable promiscuous mode */
cpsw_set_promiscious(ndev, false);
}
/* Restore allmulti on vlans if necessary */
cpsw_ale_set_allmulti(cpsw->ale,
ndev->flags & IFF_ALLMULTI, slave_port);
/* add/remove mcast address either for real netdev or for vlan */
__hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
cpsw_del_mc_addr);
}
void cpsw_intr_enable(struct cpsw_common *cpsw)
{
writel_relaxed(0xFF, &cpsw->wr_regs->tx_en);
writel_relaxed(0xFF, &cpsw->wr_regs->rx_en);
cpdma_ctlr_int_ctrl(cpsw->dma, true);
return;
}
void cpsw_intr_disable(struct cpsw_common *cpsw)
{
writel_relaxed(0, &cpsw->wr_regs->tx_en);
writel_relaxed(0, &cpsw->wr_regs->rx_en);
cpdma_ctlr_int_ctrl(cpsw->dma, false);
return;
}
void cpsw_tx_handler(void *token, int len, int status)
{
struct netdev_queue *txq;
struct sk_buff *skb = token;
struct net_device *ndev = skb->dev;
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
/* Check whether the queue is stopped due to stalled tx dma, if the
* queue is stopped then start the queue as we have free desc for tx
*/
txq = netdev_get_tx_queue(ndev, skb_get_queue_mapping(skb));
if (unlikely(netif_tx_queue_stopped(txq)))
netif_tx_wake_queue(txq);
cpts_tx_timestamp(cpsw->cpts, skb);
ndev->stats.tx_packets++;
ndev->stats.tx_bytes += len;
dev_kfree_skb_any(skb);
}
static void cpsw_rx_vlan_encap(struct sk_buff *skb)
{
struct cpsw_priv *priv = netdev_priv(skb->dev);
struct cpsw_common *cpsw = priv->cpsw;
u32 rx_vlan_encap_hdr = *((u32 *)skb->data);
u16 vtag, vid, prio, pkt_type;
/* Remove VLAN header encapsulation word */
skb_pull(skb, CPSW_RX_VLAN_ENCAP_HDR_SIZE);
pkt_type = (rx_vlan_encap_hdr >>
CPSW_RX_VLAN_ENCAP_HDR_PKT_TYPE_SHIFT) &
CPSW_RX_VLAN_ENCAP_HDR_PKT_TYPE_MSK;
/* Ignore unknown & Priority-tagged packets*/
if (pkt_type == CPSW_RX_VLAN_ENCAP_HDR_PKT_RESERV ||
pkt_type == CPSW_RX_VLAN_ENCAP_HDR_PKT_PRIO_TAG)
return;
vid = (rx_vlan_encap_hdr >>
CPSW_RX_VLAN_ENCAP_HDR_VID_SHIFT) &
VLAN_VID_MASK;
/* Ignore vid 0 and pass packet as is */
if (!vid)
return;
/* Ignore default vlans in dual mac mode */
if (cpsw->data.dual_emac &&
vid == cpsw->slaves[priv->emac_port].port_vlan)
return;
prio = (rx_vlan_encap_hdr >>
CPSW_RX_VLAN_ENCAP_HDR_PRIO_SHIFT) &
CPSW_RX_VLAN_ENCAP_HDR_PRIO_MSK;
vtag = (prio << VLAN_PRIO_SHIFT) | vid;
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vtag);
/* strip vlan tag for VLAN-tagged packet */
if (pkt_type == CPSW_RX_VLAN_ENCAP_HDR_PKT_VLAN_TAG) {
memmove(skb->data + VLAN_HLEN, skb->data, 2 * ETH_ALEN);
skb_pull(skb, VLAN_HLEN);
}
}
static void cpsw_rx_handler(void *token, int len, int status)
{
struct cpdma_chan *ch;
struct sk_buff *skb = token;
struct sk_buff *new_skb;
struct net_device *ndev = skb->dev;
int ret = 0, port;
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
struct cpsw_priv *priv;
if (cpsw->data.dual_emac) {
port = CPDMA_RX_SOURCE_PORT(status);
if (port) {
ndev = cpsw->slaves[--port].ndev;
skb->dev = ndev;
}
}
if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
/* In dual emac mode check for all interfaces */
if (cpsw->data.dual_emac && cpsw->usage_count &&
(status >= 0)) {
/* The packet received is for the interface which
* is already down and the other interface is up
* and running, instead of freeing which results
* in reducing of the number of rx descriptor in
* DMA engine, requeue skb back to cpdma.
*/
new_skb = skb;
goto requeue;
}
/* the interface is going down, skbs are purged */
dev_kfree_skb_any(skb);
return;
}
new_skb = netdev_alloc_skb_ip_align(ndev, cpsw->rx_packet_max);
if (new_skb) {
skb_copy_queue_mapping(new_skb, skb);
skb_put(skb, len);
if (status & CPDMA_RX_VLAN_ENCAP)
cpsw_rx_vlan_encap(skb);
priv = netdev_priv(ndev);
if (priv->rx_ts_enabled)
cpts_rx_timestamp(cpsw->cpts, skb);
skb->protocol = eth_type_trans(skb, ndev);
netif_receive_skb(skb);
ndev->stats.rx_bytes += len;
ndev->stats.rx_packets++;
kmemleak_not_leak(new_skb);
} else {
ndev->stats.rx_dropped++;
new_skb = skb;
}
requeue:
if (netif_dormant(ndev)) {
dev_kfree_skb_any(new_skb);
return;
}
ch = cpsw->rxv[skb_get_queue_mapping(new_skb)].ch;
ret = cpdma_chan_submit(ch, new_skb, new_skb->data,
skb_tailroom(new_skb), 0);
if (WARN_ON(ret < 0))
dev_kfree_skb_any(new_skb);
}
void cpsw_split_res(struct cpsw_common *cpsw)
{
u32 consumed_rate = 0, bigest_rate = 0;
struct cpsw_vector *txv = cpsw->txv;
int i, ch_weight, rlim_ch_num = 0;
int budget, bigest_rate_ch = 0;
u32 ch_rate, max_rate;
int ch_budget = 0;
for (i = 0; i < cpsw->tx_ch_num; i++) {
ch_rate = cpdma_chan_get_rate(txv[i].ch);
if (!ch_rate)
continue;
rlim_ch_num++;
consumed_rate += ch_rate;
}
if (cpsw->tx_ch_num == rlim_ch_num) {
max_rate = consumed_rate;
} else if (!rlim_ch_num) {
ch_budget = CPSW_POLL_WEIGHT / cpsw->tx_ch_num;
bigest_rate = 0;
max_rate = consumed_rate;
} else {
max_rate = cpsw->speed * 1000;
/* if max_rate is less then expected due to reduced link speed,
* split proportionally according next potential max speed
*/
if (max_rate < consumed_rate)
max_rate *= 10;
if (max_rate < consumed_rate)
max_rate *= 10;
ch_budget = (consumed_rate * CPSW_POLL_WEIGHT) / max_rate;
ch_budget = (CPSW_POLL_WEIGHT - ch_budget) /
(cpsw->tx_ch_num - rlim_ch_num);
bigest_rate = (max_rate - consumed_rate) /
(cpsw->tx_ch_num - rlim_ch_num);
}
/* split tx weight/budget */
budget = CPSW_POLL_WEIGHT;
for (i = 0; i < cpsw->tx_ch_num; i++) {
ch_rate = cpdma_chan_get_rate(txv[i].ch);
if (ch_rate) {
txv[i].budget = (ch_rate * CPSW_POLL_WEIGHT) / max_rate;
if (!txv[i].budget)
txv[i].budget++;
if (ch_rate > bigest_rate) {
bigest_rate_ch = i;
bigest_rate = ch_rate;
}
ch_weight = (ch_rate * 100) / max_rate;
if (!ch_weight)
ch_weight++;
cpdma_chan_set_weight(cpsw->txv[i].ch, ch_weight);
} else {
txv[i].budget = ch_budget;
if (!bigest_rate_ch)
bigest_rate_ch = i;
cpdma_chan_set_weight(cpsw->txv[i].ch, 0);
}
budget -= txv[i].budget;
}
if (budget)
txv[bigest_rate_ch].budget += budget;
/* split rx budget */
budget = CPSW_POLL_WEIGHT;
ch_budget = budget / cpsw->rx_ch_num;
for (i = 0; i < cpsw->rx_ch_num; i++) {
cpsw->rxv[i].budget = ch_budget;
budget -= ch_budget;
}
if (budget)
cpsw->rxv[0].budget += budget;
}
static irqreturn_t cpsw_tx_interrupt(int irq, void *dev_id)
{
struct cpsw_common *cpsw = dev_id;
writel(0, &cpsw->wr_regs->tx_en);
cpdma_ctlr_eoi(cpsw->dma, CPDMA_EOI_TX);
if (cpsw->quirk_irq) {
disable_irq_nosync(cpsw->irqs_table[1]);
cpsw->tx_irq_disabled = true;
}
napi_schedule(&cpsw->napi_tx);
return IRQ_HANDLED;
}
static irqreturn_t cpsw_rx_interrupt(int irq, void *dev_id)
{
struct cpsw_common *cpsw = dev_id;
cpdma_ctlr_eoi(cpsw->dma, CPDMA_EOI_RX);
writel(0, &cpsw->wr_regs->rx_en);
if (cpsw->quirk_irq) {
disable_irq_nosync(cpsw->irqs_table[0]);
cpsw->rx_irq_disabled = true;
}
napi_schedule(&cpsw->napi_rx);
return IRQ_HANDLED;
}
static int cpsw_tx_mq_poll(struct napi_struct *napi_tx, int budget)
{
u32 ch_map;
int num_tx, cur_budget, ch;
struct cpsw_common *cpsw = napi_to_cpsw(napi_tx);
struct cpsw_vector *txv;
/* process every unprocessed channel */
ch_map = cpdma_ctrl_txchs_state(cpsw->dma);
for (ch = 0, num_tx = 0; ch_map & 0xff; ch_map <<= 1, ch++) {
if (!(ch_map & 0x80))
continue;
txv = &cpsw->txv[ch];
if (unlikely(txv->budget > budget - num_tx))
cur_budget = budget - num_tx;
else
cur_budget = txv->budget;
num_tx += cpdma_chan_process(txv->ch, cur_budget);
if (num_tx >= budget)
break;
}
if (num_tx < budget) {
napi_complete(napi_tx);
writel(0xff, &cpsw->wr_regs->tx_en);
}
return num_tx;
}
static int cpsw_tx_poll(struct napi_struct *napi_tx, int budget)
{
struct cpsw_common *cpsw = napi_to_cpsw(napi_tx);
int num_tx;
num_tx = cpdma_chan_process(cpsw->txv[0].ch, budget);
if (num_tx < budget) {
napi_complete(napi_tx);
writel(0xff, &cpsw->wr_regs->tx_en);
if (cpsw->tx_irq_disabled) {
cpsw->tx_irq_disabled = false;
enable_irq(cpsw->irqs_table[1]);
}
}
return num_tx;
}
static int cpsw_rx_mq_poll(struct napi_struct *napi_rx, int budget)
{
u32 ch_map;
int num_rx, cur_budget, ch;
struct cpsw_common *cpsw = napi_to_cpsw(napi_rx);
struct cpsw_vector *rxv;
/* process every unprocessed channel */
ch_map = cpdma_ctrl_rxchs_state(cpsw->dma);
for (ch = 0, num_rx = 0; ch_map; ch_map >>= 1, ch++) {
if (!(ch_map & 0x01))
continue;
rxv = &cpsw->rxv[ch];
if (unlikely(rxv->budget > budget - num_rx))
cur_budget = budget - num_rx;
else
cur_budget = rxv->budget;
num_rx += cpdma_chan_process(rxv->ch, cur_budget);
if (num_rx >= budget)
break;
}
if (num_rx < budget) {
napi_complete_done(napi_rx, num_rx);
writel(0xff, &cpsw->wr_regs->rx_en);
}
return num_rx;
}
static int cpsw_rx_poll(struct napi_struct *napi_rx, int budget)
{
struct cpsw_common *cpsw = napi_to_cpsw(napi_rx);
int num_rx;
num_rx = cpdma_chan_process(cpsw->rxv[0].ch, budget);
if (num_rx < budget) {
napi_complete_done(napi_rx, num_rx);
writel(0xff, &cpsw->wr_regs->rx_en);
if (cpsw->rx_irq_disabled) {
cpsw->rx_irq_disabled = false;
enable_irq(cpsw->irqs_table[0]);
}
}
return num_rx;
}
static inline void soft_reset(const char *module, void __iomem *reg)
{
unsigned long timeout = jiffies + HZ;
writel_relaxed(1, reg);
do {
cpu_relax();
} while ((readl_relaxed(reg) & 1) && time_after(timeout, jiffies));
WARN(readl_relaxed(reg) & 1, "failed to soft-reset %s\n", module);
}
static void cpsw_set_slave_mac(struct cpsw_slave *slave,
struct cpsw_priv *priv)
{
slave_write(slave, mac_hi(priv->mac_addr), SA_HI);
slave_write(slave, mac_lo(priv->mac_addr), SA_LO);
}
static bool cpsw_shp_is_off(struct cpsw_priv *priv)
{
struct cpsw_common *cpsw = priv->cpsw;
struct cpsw_slave *slave;
u32 shift, mask, val;
val = readl_relaxed(&cpsw->regs->ptype);
slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
shift = CPSW_FIFO_SHAPE_EN_SHIFT + 3 * slave->slave_num;
mask = 7 << shift;
val = val & mask;
return !val;
}
static void cpsw_fifo_shp_on(struct cpsw_priv *priv, int fifo, int on)
{
struct cpsw_common *cpsw = priv->cpsw;
struct cpsw_slave *slave;
u32 shift, mask, val;
val = readl_relaxed(&cpsw->regs->ptype);
slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
shift = CPSW_FIFO_SHAPE_EN_SHIFT + 3 * slave->slave_num;
mask = (1 << --fifo) << shift;
val = on ? val | mask : val & ~mask;
writel_relaxed(val, &cpsw->regs->ptype);
}
static void _cpsw_adjust_link(struct cpsw_slave *slave,
struct cpsw_priv *priv, bool *link)
{
struct phy_device *phy = slave->phy;
u32 mac_control = 0;
u32 slave_port;
struct cpsw_common *cpsw = priv->cpsw;
if (!phy)
return;
slave_port = cpsw_get_slave_port(slave->slave_num);
if (phy->link) {
mac_control = CPSW_SL_CTL_GMII_EN;
if (phy->speed == 1000)
mac_control |= CPSW_SL_CTL_GIG;
if (phy->duplex)
mac_control |= CPSW_SL_CTL_FULLDUPLEX;
/* set speed_in input in case RMII mode is used in 100Mbps */
if (phy->speed == 100)
mac_control |= CPSW_SL_CTL_IFCTL_A;
/* in band mode only works in 10Mbps RGMII mode */
else if ((phy->speed == 10) && phy_interface_is_rgmii(phy))
mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */
if (priv->rx_pause)
mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
if (priv->tx_pause)
mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
if (mac_control != slave->mac_control)
cpsw_sl_ctl_set(slave->mac_sl, mac_control);
/* enable forwarding */
cpsw_ale_control_set(cpsw->ale, slave_port,
ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
*link = true;
if (priv->shp_cfg_speed &&
priv->shp_cfg_speed != slave->phy->speed &&
!cpsw_shp_is_off(priv))
dev_warn(priv->dev,
"Speed was changed, CBS shaper speeds are changed!");
} else {
mac_control = 0;
/* disable forwarding */
cpsw_ale_control_set(cpsw->ale, slave_port,
ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
cpsw_sl_wait_for_idle(slave->mac_sl, 100);
cpsw_sl_ctl_reset(slave->mac_sl);
}
if (mac_control != slave->mac_control)
phy_print_status(phy);
slave->mac_control = mac_control;
}
static int cpsw_get_common_speed(struct cpsw_common *cpsw)
{
int i, speed;
for (i = 0, speed = 0; i < cpsw->data.slaves; i++)
if (cpsw->slaves[i].phy && cpsw->slaves[i].phy->link)
speed += cpsw->slaves[i].phy->speed;
return speed;
}
static int cpsw_need_resplit(struct cpsw_common *cpsw)
{
int i, rlim_ch_num;
int speed, ch_rate;
/* re-split resources only in case speed was changed */
speed = cpsw_get_common_speed(cpsw);
if (speed == cpsw->speed || !speed)
return 0;
cpsw->speed = speed;
for (i = 0, rlim_ch_num = 0; i < cpsw->tx_ch_num; i++) {
ch_rate = cpdma_chan_get_rate(cpsw->txv[i].ch);
if (!ch_rate)
break;
rlim_ch_num++;
}
/* cases not dependent on speed */
if (!rlim_ch_num || rlim_ch_num == cpsw->tx_ch_num)
return 0;
return 1;
}
static void cpsw_adjust_link(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
bool link = false;
for_each_slave(priv, _cpsw_adjust_link, priv, &link);
if (link) {
if (cpsw_need_resplit(cpsw))
cpsw_split_res(cpsw);
netif_carrier_on(ndev);
if (netif_running(ndev))
netif_tx_wake_all_queues(ndev);
} else {
netif_carrier_off(ndev);
netif_tx_stop_all_queues(ndev);
}
}
static inline void cpsw_add_dual_emac_def_ale_entries(
struct cpsw_priv *priv, struct cpsw_slave *slave,
u32 slave_port)
{
struct cpsw_common *cpsw = priv->cpsw;
u32 port_mask = 1 << slave_port | ALE_PORT_HOST;
if (cpsw->version == CPSW_VERSION_1)
slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN);
else
slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN);
cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask,
port_mask, port_mask, 0);
cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
ALE_PORT_HOST, ALE_VLAN, slave->port_vlan, 0);
cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
HOST_PORT_NUM, ALE_VLAN |
ALE_SECURE, slave->port_vlan);
cpsw_ale_control_set(cpsw->ale, slave_port,
ALE_PORT_DROP_UNKNOWN_VLAN, 1);
}
static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
{
u32 slave_port;
struct phy_device *phy;
struct cpsw_common *cpsw = priv->cpsw;
cpsw_sl_reset(slave->mac_sl, 100);
cpsw_sl_ctl_reset(slave->mac_sl);
/* setup priority mapping */
cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP,
RX_PRIORITY_MAPPING);
switch (cpsw->version) {
case CPSW_VERSION_1:
slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
/* Increase RX FIFO size to 5 for supporting fullduplex
* flow control mode
*/
slave_write(slave,
(CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
break;
case CPSW_VERSION_2:
case CPSW_VERSION_3:
case CPSW_VERSION_4:
slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
/* Increase RX FIFO size to 5 for supporting fullduplex
* flow control mode
*/
slave_write(slave,
(CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
break;
}
/* setup max packet size, and mac address */
cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN,
cpsw->rx_packet_max);
cpsw_set_slave_mac(slave, priv);
slave->mac_control = 0; /* no link yet */
slave_port = cpsw_get_slave_port(slave->slave_num);
if (cpsw->data.dual_emac)
cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
else
cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
if (slave->data->phy_node) {
phy = of_phy_connect(priv->ndev, slave->data->phy_node,
&cpsw_adjust_link, 0, slave->data->phy_if);
if (!phy) {
dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
slave->data->phy_node,
slave->slave_num);
return;
}
} else {
phy = phy_connect(priv->ndev, slave->data->phy_id,
&cpsw_adjust_link, slave->data->phy_if);
if (IS_ERR(phy)) {
dev_err(priv->dev,
"phy \"%s\" not found on slave %d, err %ld\n",
slave->data->phy_id, slave->slave_num,
PTR_ERR(phy));
return;
}
}
slave->phy = phy;
phy_attached_info(slave->phy);
phy_start(slave->phy);
/* Configure GMII_SEL register */
if (!IS_ERR(slave->data->ifphy))
phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
slave->data->phy_if);
else
cpsw_phy_sel(cpsw->dev, slave->phy->interface,
slave->slave_num);
}
static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
{
struct cpsw_common *cpsw = priv->cpsw;
const int vlan = cpsw->data.default_vlan;
u32 reg;
int i;
int unreg_mcast_mask;
reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
CPSW2_PORT_VLAN;
writel(vlan, &cpsw->host_port_regs->port_vlan);
for (i = 0; i < cpsw->data.slaves; i++)
slave_write(cpsw->slaves + i, vlan, reg);
if (priv->ndev->flags & IFF_ALLMULTI)
unreg_mcast_mask = ALE_ALL_PORTS;
else
unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
ALE_ALL_PORTS, ALE_ALL_PORTS,
unreg_mcast_mask);
}
static void cpsw_init_host_port(struct cpsw_priv *priv)
{
u32 fifo_mode;
u32 control_reg;
struct cpsw_common *cpsw = priv->cpsw;
/* soft reset the controller and initialize ale */
soft_reset("cpsw", &cpsw->regs->soft_reset);
cpsw_ale_start(cpsw->ale);
/* switch to vlan unaware mode */
cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
CPSW_ALE_VLAN_AWARE);
control_reg = readl(&cpsw->regs->control);
control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
writel(control_reg, &cpsw->regs->control);
fifo_mode = (cpsw->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
CPSW_FIFO_NORMAL_MODE;
writel(fifo_mode, &cpsw->host_port_regs->tx_in_ctl);
/* setup host port priority mapping */
writel_relaxed(CPDMA_TX_PRIORITY_MAP,
&cpsw->host_port_regs->cpdma_tx_pri_map);
writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
if (!cpsw->data.dual_emac) {
cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
0, 0);
cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
ALE_PORT_HOST, 0, 0, ALE_MCAST_FWD_2);
}
}
int cpsw_fill_rx_channels(struct cpsw_priv *priv)
{
struct cpsw_common *cpsw = priv->cpsw;
struct sk_buff *skb;
int ch_buf_num;
int ch, i, ret;
for (ch = 0; ch < cpsw->rx_ch_num; ch++) {
ch_buf_num = cpdma_chan_get_rx_buf_num(cpsw->rxv[ch].ch);
for (i = 0; i < ch_buf_num; i++) {
skb = __netdev_alloc_skb_ip_align(priv->ndev,
cpsw->rx_packet_max,
GFP_KERNEL);
if (!skb) {
cpsw_err(priv, ifup, "cannot allocate skb\n");
return -ENOMEM;
}
skb_set_queue_mapping(skb, ch);
ret = cpdma_chan_submit(cpsw->rxv[ch].ch, skb,
skb->data, skb_tailroom(skb),
0);
if (ret < 0) {
cpsw_err(priv, ifup,
"cannot submit skb to channel %d rx, error %d\n",
ch, ret);
kfree_skb(skb);
return ret;
}
kmemleak_not_leak(skb);
}
cpsw_info(priv, ifup, "ch %d rx, submitted %d descriptors\n",
ch, ch_buf_num);
}
return 0;
}
static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw)
{
u32 slave_port;
slave_port = cpsw_get_slave_port(slave->slave_num);
if (!slave->phy)
return;
phy_stop(slave->phy);
phy_disconnect(slave->phy);
slave->phy = NULL;
cpsw_ale_control_set(cpsw->ale, slave_port,
ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
cpsw_sl_reset(slave->mac_sl, 100);
cpsw_sl_ctl_reset(slave->mac_sl);
}
static int cpsw_tc_to_fifo(int tc, int num_tc)
{
if (tc == num_tc - 1)
return 0;
return CPSW_FIFO_SHAPERS_NUM - tc;
}
static int cpsw_set_fifo_bw(struct cpsw_priv *priv, int fifo, int bw)
{
struct cpsw_common *cpsw = priv->cpsw;
u32 val = 0, send_pct, shift;
struct cpsw_slave *slave;
int pct = 0, i;
if (bw > priv->shp_cfg_speed * 1000)
goto err;
/* shaping has to stay enabled for highest fifos linearly
* and fifo bw no more then interface can allow
*/
slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
send_pct = slave_read(slave, SEND_PERCENT);
for (i = CPSW_FIFO_SHAPERS_NUM; i > 0; i--) {
if (!bw) {
if (i >= fifo || !priv->fifo_bw[i])
continue;
dev_warn(priv->dev, "Prev FIFO%d is shaped", i);
continue;
}
if (!priv->fifo_bw[i] && i > fifo) {
dev_err(priv->dev, "Upper FIFO%d is not shaped", i);
return -EINVAL;
}
shift = (i - 1) * 8;
if (i == fifo) {
send_pct &= ~(CPSW_PCT_MASK << shift);
val = DIV_ROUND_UP(bw, priv->shp_cfg_speed * 10);
if (!val)
val = 1;
send_pct |= val << shift;
pct += val;
continue;
}
if (priv->fifo_bw[i])
pct += (send_pct >> shift) & CPSW_PCT_MASK;
}
if (pct >= 100)
goto err;
slave_write(slave, send_pct, SEND_PERCENT);
priv->fifo_bw[fifo] = bw;
dev_warn(priv->dev, "set FIFO%d bw = %d\n", fifo,
DIV_ROUND_CLOSEST(val * priv->shp_cfg_speed, 100));
return 0;
err:
dev_err(priv->dev, "Bandwidth doesn't fit in tc configuration");
return -EINVAL;
}
static int cpsw_set_fifo_rlimit(struct cpsw_priv *priv, int fifo, int bw)
{
struct cpsw_common *cpsw = priv->cpsw;
struct cpsw_slave *slave;
u32 tx_in_ctl_rg, val;
int ret;
ret = cpsw_set_fifo_bw(priv, fifo, bw);
if (ret)
return ret;
slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
tx_in_ctl_rg = cpsw->version == CPSW_VERSION_1 ?
CPSW1_TX_IN_CTL : CPSW2_TX_IN_CTL;
if (!bw)
cpsw_fifo_shp_on(priv, fifo, bw);
val = slave_read(slave, tx_in_ctl_rg);
if (cpsw_shp_is_off(priv)) {
/* disable FIFOs rate limited queues */
val &= ~(0xf << CPSW_FIFO_RATE_EN_SHIFT);
/* set type of FIFO queues to normal priority mode */
val &= ~(3 << CPSW_FIFO_QUEUE_TYPE_SHIFT);
/* set type of FIFO queues to be rate limited */
if (bw)
val |= 2 << CPSW_FIFO_QUEUE_TYPE_SHIFT;
else
priv->shp_cfg_speed = 0;
}
/* toggle a FIFO rate limited queue */
if (bw)
val |= BIT(fifo + CPSW_FIFO_RATE_EN_SHIFT);
else
val &= ~BIT(fifo + CPSW_FIFO_RATE_EN_SHIFT);
slave_write(slave, val, tx_in_ctl_rg);
/* FIFO transmit shape enable */
cpsw_fifo_shp_on(priv, fifo, bw);
return 0;
}
/* Defaults:
* class A - prio 3
* class B - prio 2
* shaping for class A should be set first
*/
static int cpsw_set_cbs(struct net_device *ndev,
struct tc_cbs_qopt_offload *qopt)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
struct cpsw_slave *slave;
int prev_speed = 0;
int tc, ret, fifo;
u32 bw = 0;
tc = netdev_txq_to_tc(priv->ndev, qopt->queue);
/* enable channels in backward order, as highest FIFOs must be rate
* limited first and for compliance with CPDMA rate limited channels
* that also used in bacward order. FIFO0 cannot be rate limited.
*/
fifo = cpsw_tc_to_fifo(tc, ndev->num_tc);
if (!fifo) {
dev_err(priv->dev, "Last tc%d can't be rate limited", tc);
return -EINVAL;
}
/* do nothing, it's disabled anyway */
if (!qopt->enable && !priv->fifo_bw[fifo])
return 0;
/* shapers can be set if link speed is known */
slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
if (slave->phy && slave->phy->link) {
if (priv->shp_cfg_speed &&
priv->shp_cfg_speed != slave->phy->speed)
prev_speed = priv->shp_cfg_speed;
priv->shp_cfg_speed = slave->phy->speed;
}
if (!priv->shp_cfg_speed) {
dev_err(priv->dev, "Link speed is not known");
return -1;
}
ret = pm_runtime_get_sync(cpsw->dev);
if (ret < 0) {
pm_runtime_put_noidle(cpsw->dev);
return ret;
}
bw = qopt->enable ? qopt->idleslope : 0;
ret = cpsw_set_fifo_rlimit(priv, fifo, bw);
if (ret) {
priv->shp_cfg_speed = prev_speed;
prev_speed = 0;
}
if (bw && prev_speed)
dev_warn(priv->dev,
"Speed was changed, CBS shaper speeds are changed!");
pm_runtime_put_sync(cpsw->dev);
return ret;
}
static void cpsw_cbs_resume(struct cpsw_slave *slave, struct cpsw_priv *priv)
{
int fifo, bw;
for (fifo = CPSW_FIFO_SHAPERS_NUM; fifo > 0; fifo--) {
bw = priv->fifo_bw[fifo];
if (!bw)
continue;
cpsw_set_fifo_rlimit(priv, fifo, bw);
}
}
static void cpsw_mqprio_resume(struct cpsw_slave *slave, struct cpsw_priv *priv)
{
struct cpsw_common *cpsw = priv->cpsw;
u32 tx_prio_map = 0;
int i, tc, fifo;
u32 tx_prio_rg;
if (!priv->mqprio_hw)
return;
for (i = 0; i < 8; i++) {
tc = netdev_get_prio_tc_map(priv->ndev, i);
fifo = CPSW_FIFO_SHAPERS_NUM - tc;
tx_prio_map |= fifo << (4 * i);
}
tx_prio_rg = cpsw->version == CPSW_VERSION_1 ?
CPSW1_TX_PRI_MAP : CPSW2_TX_PRI_MAP;
slave_write(slave, tx_prio_map, tx_prio_rg);
}
static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
{
struct cpsw_priv *priv = arg;
if (!vdev)
return 0;
cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
return 0;
}
/* restore resources after port reset */
static void cpsw_restore(struct cpsw_priv *priv)
{
/* restore vlan configurations */
vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);
/* restore MQPRIO offload */
for_each_slave(priv, cpsw_mqprio_resume, priv);
/* restore CBS offload */
for_each_slave(priv, cpsw_cbs_resume, priv);
}
static int cpsw_ndo_open(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
int ret;
u32 reg;
ret = pm_runtime_get_sync(cpsw->dev);
if (ret < 0) {
pm_runtime_put_noidle(cpsw->dev);
return ret;
}
netif_carrier_off(ndev);
/* Notify the stack of the actual queue counts. */
ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
if (ret) {
dev_err(priv->dev, "cannot set real number of tx queues\n");
goto err_cleanup;
}
ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
if (ret) {
dev_err(priv->dev, "cannot set real number of rx queues\n");
goto err_cleanup;
}
reg = cpsw->version;
dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
CPSW_RTL_VERSION(reg));
/* Initialize host and slave ports */
if (!cpsw->usage_count)
cpsw_init_host_port(priv);
for_each_slave(priv, cpsw_slave_open, priv);
/* Add default VLAN */
if (!cpsw->data.dual_emac)
cpsw_add_default_vlan(priv);
else
cpsw_ale_add_vlan(cpsw->ale, cpsw->data.default_vlan,
ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
/* initialize shared resources for every ndev */
if (!cpsw->usage_count) {
/* disable priority elevation */
writel_relaxed(0, &cpsw->regs->ptype);
/* enable statistics collection only on all ports */
writel_relaxed(0x7, &cpsw->regs->stat_port_en);
/* Enable internal fifo flow control */
writel(0x7, &cpsw->regs->flow_control);
napi_enable(&cpsw->napi_rx);
napi_enable(&cpsw->napi_tx);
if (cpsw->tx_irq_disabled) {
cpsw->tx_irq_disabled = false;
enable_irq(cpsw->irqs_table[1]);
}
if (cpsw->rx_irq_disabled) {
cpsw->rx_irq_disabled = false;
enable_irq(cpsw->irqs_table[0]);
}
ret = cpsw_fill_rx_channels(priv);
if (ret < 0)
goto err_cleanup;
if (cpts_register(cpsw->cpts))
dev_err(priv->dev, "error registering cpts device\n");
}
cpsw_restore(priv);
/* Enable Interrupt pacing if configured */
if (cpsw->coal_intvl != 0) {
struct ethtool_coalesce coal;
coal.rx_coalesce_usecs = cpsw->coal_intvl;
cpsw_set_coalesce(ndev, &coal);
}
cpdma_ctlr_start(cpsw->dma);
cpsw_intr_enable(cpsw);
cpsw->usage_count++;
return 0;
err_cleanup:
cpdma_ctlr_stop(cpsw->dma);
for_each_slave(priv, cpsw_slave_stop, cpsw);
pm_runtime_put_sync(cpsw->dev);
netif_carrier_off(priv->ndev);
return ret;
}
static int cpsw_ndo_stop(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
cpsw_info(priv, ifdown, "shutting down cpsw device\n");
__hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
netif_tx_stop_all_queues(priv->ndev);
netif_carrier_off(priv->ndev);
if (cpsw->usage_count <= 1) {
napi_disable(&cpsw->napi_rx);
napi_disable(&cpsw->napi_tx);
cpts_unregister(cpsw->cpts);
cpsw_intr_disable(cpsw);
cpdma_ctlr_stop(cpsw->dma);
cpsw_ale_stop(cpsw->ale);
}
for_each_slave(priv, cpsw_slave_stop, cpsw);
if (cpsw_need_resplit(cpsw))
cpsw_split_res(cpsw);
cpsw->usage_count--;
pm_runtime_put_sync(cpsw->dev);
return 0;
}
static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
struct cpts *cpts = cpsw->cpts;
struct netdev_queue *txq;
struct cpdma_chan *txch;
int ret, q_idx;
if (skb_padto(skb, CPSW_MIN_PACKET_SIZE)) {
cpsw_err(priv, tx_err, "packet pad failed\n");
ndev->stats.tx_dropped++;
return NET_XMIT_DROP;
}
if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
q_idx = skb_get_queue_mapping(skb);
if (q_idx >= cpsw->tx_ch_num)
q_idx = q_idx % cpsw->tx_ch_num;
txch = cpsw->txv[q_idx].ch;
txq = netdev_get_tx_queue(ndev, q_idx);
skb_tx_timestamp(skb);
ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
priv->emac_port + cpsw->data.dual_emac);
if (unlikely(ret != 0)) {
cpsw_err(priv, tx_err, "desc submit failed\n");
goto fail;
}
/* If there is no more tx desc left free then we need to
* tell the kernel to stop sending us tx frames.
*/
if (unlikely(!cpdma_check_free_tx_desc(txch))) {
netif_tx_stop_queue(txq);
/* Barrier, so that stop_queue visible to other cpus */
smp_mb__after_atomic();
if (cpdma_check_free_tx_desc(txch))
netif_tx_wake_queue(txq);
}
return NETDEV_TX_OK;
fail:
ndev->stats.tx_dropped++;
netif_tx_stop_queue(txq);
/* Barrier, so that stop_queue visible to other cpus */
smp_mb__after_atomic();
if (cpdma_check_free_tx_desc(txch))
netif_tx_wake_queue(txq);
return NETDEV_TX_BUSY;
}
#if IS_ENABLED(CONFIG_TI_CPTS)
static void cpsw_hwtstamp_v1(struct cpsw_priv *priv)
{
struct cpsw_common *cpsw = priv->cpsw;
struct cpsw_slave *slave = &cpsw->slaves[cpsw->data.active_slave];
u32 ts_en, seq_id;
if (!priv->tx_ts_enabled && !priv->rx_ts_enabled) {
slave_write(slave, 0, CPSW1_TS_CTL);
return;
}
seq_id = (30 << CPSW_V1_SEQ_ID_OFS_SHIFT) | ETH_P_1588;
ts_en = EVENT_MSG_BITS << CPSW_V1_MSG_TYPE_OFS;
if (priv->tx_ts_enabled)
ts_en |= CPSW_V1_TS_TX_EN;
if (priv->rx_ts_enabled)
ts_en |= CPSW_V1_TS_RX_EN;
slave_write(slave, ts_en, CPSW1_TS_CTL);
slave_write(slave, seq_id, CPSW1_TS_SEQ_LTYPE);
}
static void cpsw_hwtstamp_v2(struct cpsw_priv *priv)
{
struct cpsw_slave *slave;
struct cpsw_common *cpsw = priv->cpsw;
u32 ctrl, mtype;
slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
ctrl = slave_read(slave, CPSW2_CONTROL);
switch (cpsw->version) {
case CPSW_VERSION_2:
ctrl &= ~CTRL_V2_ALL_TS_MASK;
if (priv->tx_ts_enabled)
ctrl |= CTRL_V2_TX_TS_BITS;
if (priv->rx_ts_enabled)
ctrl |= CTRL_V2_RX_TS_BITS;
break;
case CPSW_VERSION_3:
default:
ctrl &= ~CTRL_V3_ALL_TS_MASK;
if (priv->tx_ts_enabled)
ctrl |= CTRL_V3_TX_TS_BITS;
if (priv->rx_ts_enabled)
ctrl |= CTRL_V3_RX_TS_BITS;
break;
}
mtype = (30 << TS_SEQ_ID_OFFSET_SHIFT) | EVENT_MSG_BITS;
slave_write(slave, mtype, CPSW2_TS_SEQ_MTYPE);
slave_write(slave, ctrl, CPSW2_CONTROL);
writel_relaxed(ETH_P_1588, &cpsw->regs->ts_ltype);
writel_relaxed(ETH_P_8021Q, &cpsw->regs->vlan_ltype);
}
static int cpsw_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
{
struct cpsw_priv *priv = netdev_priv(dev);
struct hwtstamp_config cfg;
struct cpsw_common *cpsw = priv->cpsw;
if (cpsw->version != CPSW_VERSION_1 &&
cpsw->version != CPSW_VERSION_2 &&
cpsw->version != CPSW_VERSION_3)
return -EOPNOTSUPP;
if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
return -EFAULT;
/* reserved for future extensions */
if (cfg.flags)
return -EINVAL;
if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
return -ERANGE;
switch (cfg.rx_filter) {
case HWTSTAMP_FILTER_NONE:
priv->rx_ts_enabled = 0;
break;
case HWTSTAMP_FILTER_ALL:
case HWTSTAMP_FILTER_NTP_ALL:
return -ERANGE;
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
priv->rx_ts_enabled = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
break;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
priv->rx_ts_enabled = HWTSTAMP_FILTER_PTP_V2_EVENT;
cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
break;
default:
return -ERANGE;
}
priv->tx_ts_enabled = cfg.tx_type == HWTSTAMP_TX_ON;
switch (cpsw->version) {
case CPSW_VERSION_1:
cpsw_hwtstamp_v1(priv);
break;
case CPSW_VERSION_2:
case CPSW_VERSION_3:
cpsw_hwtstamp_v2(priv);
break;
default:
WARN_ON(1);
}
return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
}
static int cpsw_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
{
struct cpsw_common *cpsw = ndev_to_cpsw(dev);
struct cpsw_priv *priv = netdev_priv(dev);
struct hwtstamp_config cfg;
if (cpsw->version != CPSW_VERSION_1 &&
cpsw->version != CPSW_VERSION_2 &&
cpsw->version != CPSW_VERSION_3)
return -EOPNOTSUPP;
cfg.flags = 0;
cfg.tx_type = priv->tx_ts_enabled ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
cfg.rx_filter = priv->rx_ts_enabled;
return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
}
#else
static int cpsw_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
{
return -EOPNOTSUPP;
}
static int cpsw_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
{
return -EOPNOTSUPP;
}
#endif /*CONFIG_TI_CPTS*/
static int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
struct cpsw_priv *priv = netdev_priv(dev);
struct cpsw_common *cpsw = priv->cpsw;
int slave_no = cpsw_slave_index(cpsw, priv);
if (!netif_running(dev))
return -EINVAL;
switch (cmd) {
case SIOCSHWTSTAMP:
return cpsw_hwtstamp_set(dev, req);
case SIOCGHWTSTAMP:
return cpsw_hwtstamp_get(dev, req);
}
if (!cpsw->slaves[slave_no].phy)
return -EOPNOTSUPP;
return phy_mii_ioctl(cpsw->slaves[slave_no].phy, req, cmd);
}
static void cpsw_ndo_tx_timeout(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
int ch;
cpsw_err(priv, tx_err, "transmit timeout, restarting dma\n");
ndev->stats.tx_errors++;
cpsw_intr_disable(cpsw);
for (ch = 0; ch < cpsw->tx_ch_num; ch++) {
cpdma_chan_stop(cpsw->txv[ch].ch);
cpdma_chan_start(cpsw->txv[ch].ch);
}
cpsw_intr_enable(cpsw);
netif_trans_update(ndev);
netif_tx_wake_all_queues(ndev);
}
static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct sockaddr *addr = (struct sockaddr *)p;
struct cpsw_common *cpsw = priv->cpsw;
int flags = 0;
u16 vid = 0;
int ret;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
ret = pm_runtime_get_sync(cpsw->dev);
if (ret < 0) {
pm_runtime_put_noidle(cpsw->dev);
return ret;
}
if (cpsw->data.dual_emac) {
vid = cpsw->slaves[priv->emac_port].port_vlan;
flags = ALE_VLAN;
}
cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
flags, vid);
cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
flags, vid);
memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
for_each_slave(priv, cpsw_set_slave_mac, priv);
pm_runtime_put(cpsw->dev);
return 0;
}
static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
unsigned short vid)
{
int ret;
int unreg_mcast_mask = 0;
int mcast_mask;
u32 port_mask;
struct cpsw_common *cpsw = priv->cpsw;
if (cpsw->data.dual_emac) {
port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;
mcast_mask = ALE_PORT_HOST;
if (priv->ndev->flags & IFF_ALLMULTI)
unreg_mcast_mask = mcast_mask;
} else {
port_mask = ALE_ALL_PORTS;
mcast_mask = port_mask;
if (priv->ndev->flags & IFF_ALLMULTI)
unreg_mcast_mask = ALE_ALL_PORTS;
else
unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
}
ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
unreg_mcast_mask);
if (ret != 0)
return ret;
ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
HOST_PORT_NUM, ALE_VLAN, vid);
if (ret != 0)
goto clean_vid;
ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
mcast_mask, ALE_VLAN, vid, 0);
if (ret != 0)
goto clean_vlan_ucast;
return 0;
clean_vlan_ucast:
cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
HOST_PORT_NUM, ALE_VLAN, vid);
clean_vid:
cpsw_ale_del_vlan(cpsw->ale, vid, 0);
return ret;
}
static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
__be16 proto, u16 vid)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
int ret;
if (vid == cpsw->data.default_vlan)
return 0;
ret = pm_runtime_get_sync(cpsw->dev);
if (ret < 0) {
pm_runtime_put_noidle(cpsw->dev);
return ret;
}
if (cpsw->data.dual_emac) {
/* In dual EMAC, reserved VLAN id should not be used for
* creating VLAN interfaces as this can break the dual
* EMAC port separation
*/
int i;
for (i = 0; i < cpsw->data.slaves; i++) {
if (vid == cpsw->slaves[i].port_vlan) {
ret = -EINVAL;
goto err;
}
}
}
dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
ret = cpsw_add_vlan_ale_entry(priv, vid);
err:
pm_runtime_put(cpsw->dev);
return ret;
}
static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
__be16 proto, u16 vid)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
int ret;
if (vid == cpsw->data.default_vlan)
return 0;
ret = pm_runtime_get_sync(cpsw->dev);
if (ret < 0) {
pm_runtime_put_noidle(cpsw->dev);
return ret;
}
if (cpsw->data.dual_emac) {
int i;
for (i = 0; i < cpsw->data.slaves; i++) {
if (vid == cpsw->slaves[i].port_vlan)
goto err;
}
}
dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
ret |= cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
HOST_PORT_NUM, ALE_VLAN, vid);
ret |= cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
0, ALE_VLAN, vid);
ret |= cpsw_ale_flush_multicast(cpsw->ale, 0, vid);
err:
pm_runtime_put(cpsw->dev);
return ret;
}
static int cpsw_ndo_set_tx_maxrate(struct net_device *ndev, int queue, u32 rate)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
struct cpsw_slave *slave;
u32 min_rate;
u32 ch_rate;
int i, ret;
ch_rate = netdev_get_tx_queue(ndev, queue)->tx_maxrate;
if (ch_rate == rate)
return 0;
ch_rate = rate * 1000;
min_rate = cpdma_chan_get_min_rate(cpsw->dma);
if ((ch_rate < min_rate && ch_rate)) {
dev_err(priv->dev, "The channel rate cannot be less than %dMbps",
min_rate);
return -EINVAL;
}
if (rate > cpsw->speed) {
dev_err(priv->dev, "The channel rate cannot be more than 2Gbps");
return -EINVAL;
}
ret = pm_runtime_get_sync(cpsw->dev);
if (ret < 0) {
pm_runtime_put_noidle(cpsw->dev);
return ret;
}
ret = cpdma_chan_set_rate(cpsw->txv[queue].ch, ch_rate);
pm_runtime_put(cpsw->dev);
if (ret)
return ret;
/* update rates for slaves tx queues */
for (i = 0; i < cpsw->data.slaves; i++) {
slave = &cpsw->slaves[i];
if (!slave->ndev)
continue;
netdev_get_tx_queue(slave->ndev, queue)->tx_maxrate = rate;
}
cpsw_split_res(cpsw);
return ret;
}
static int cpsw_set_mqprio(struct net_device *ndev, void *type_data)
{
struct tc_mqprio_qopt_offload *mqprio = type_data;
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
int fifo, num_tc, count, offset;
struct cpsw_slave *slave;
u32 tx_prio_map = 0;
int i, tc, ret;
num_tc = mqprio->qopt.num_tc;
if (num_tc > CPSW_TC_NUM)
return -EINVAL;
if (mqprio->mode != TC_MQPRIO_MODE_DCB)
return -EINVAL;
ret = pm_runtime_get_sync(cpsw->dev);
if (ret < 0) {
pm_runtime_put_noidle(cpsw->dev);
return ret;
}
if (num_tc) {
for (i = 0; i < 8; i++) {
tc = mqprio->qopt.prio_tc_map[i];
fifo = cpsw_tc_to_fifo(tc, num_tc);
tx_prio_map |= fifo << (4 * i);
}
netdev_set_num_tc(ndev, num_tc);
for (i = 0; i < num_tc; i++) {
count = mqprio->qopt.count[i];
offset = mqprio->qopt.offset[i];
netdev_set_tc_queue(ndev, i, count, offset);
}
}
if (!mqprio->qopt.hw) {
/* restore default configuration */
netdev_reset_tc(ndev);
tx_prio_map = TX_PRIORITY_MAPPING;
}
priv->mqprio_hw = mqprio->qopt.hw;
offset = cpsw->version == CPSW_VERSION_1 ?
CPSW1_TX_PRI_MAP : CPSW2_TX_PRI_MAP;
slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
slave_write(slave, tx_prio_map, offset);
pm_runtime_put_sync(cpsw->dev);
return 0;
}
static int cpsw_ndo_setup_tc(struct net_device *ndev, enum tc_setup_type type,
void *type_data)
{
switch (type) {
case TC_SETUP_QDISC_CBS:
return cpsw_set_cbs(ndev, type_data);
case TC_SETUP_QDISC_MQPRIO:
return cpsw_set_mqprio(ndev, type_data);
default:
return -EOPNOTSUPP;
}
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void cpsw_ndo_poll_controller(struct net_device *ndev)
{
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
cpsw_intr_disable(cpsw);
cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
cpsw_intr_enable(cpsw);
}
#endif
static const struct net_device_ops cpsw_netdev_ops = {
.ndo_open = cpsw_ndo_open,
.ndo_stop = cpsw_ndo_stop,
.ndo_start_xmit = cpsw_ndo_start_xmit,
.ndo_set_mac_address = cpsw_ndo_set_mac_address,
.ndo_do_ioctl = cpsw_ndo_ioctl,
.ndo_validate_addr = eth_validate_addr,
.ndo_tx_timeout = cpsw_ndo_tx_timeout,
.ndo_set_rx_mode = cpsw_ndo_set_rx_mode,
.ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = cpsw_ndo_poll_controller,
#endif
.ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
.ndo_setup_tc = cpsw_ndo_setup_tc,
};
static void cpsw_get_drvinfo(struct net_device *ndev,
struct ethtool_drvinfo *info)
{
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
struct platform_device *pdev = to_platform_device(cpsw->dev);
strlcpy(info->driver, "cpsw", sizeof(info->driver));
strlcpy(info->version, "1.0", sizeof(info->version));
strlcpy(info->bus_info, pdev->name, sizeof(info->bus_info));
}
static int cpsw_set_pauseparam(struct net_device *ndev,
struct ethtool_pauseparam *pause)
{
struct cpsw_priv *priv = netdev_priv(ndev);
bool link;
priv->rx_pause = pause->rx_pause ? true : false;
priv->tx_pause = pause->tx_pause ? true : false;
for_each_slave(priv, _cpsw_adjust_link, priv, &link);
return 0;
}
static int cpsw_set_channels(struct net_device *ndev,
struct ethtool_channels *chs)
{
return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
}
static const struct ethtool_ops cpsw_ethtool_ops = {
.get_drvinfo = cpsw_get_drvinfo,
.get_msglevel = cpsw_get_msglevel,
.set_msglevel = cpsw_set_msglevel,
.get_link = ethtool_op_get_link,
.get_ts_info = cpsw_get_ts_info,
.get_coalesce = cpsw_get_coalesce,
.set_coalesce = cpsw_set_coalesce,
.get_sset_count = cpsw_get_sset_count,
.get_strings = cpsw_get_strings,
.get_ethtool_stats = cpsw_get_ethtool_stats,
.get_pauseparam = cpsw_get_pauseparam,
.set_pauseparam = cpsw_set_pauseparam,
.get_wol = cpsw_get_wol,
.set_wol = cpsw_set_wol,
.get_regs_len = cpsw_get_regs_len,
.get_regs = cpsw_get_regs,
.begin = cpsw_ethtool_op_begin,
.complete = cpsw_ethtool_op_complete,
.get_channels = cpsw_get_channels,
.set_channels = cpsw_set_channels,
.get_link_ksettings = cpsw_get_link_ksettings,
.set_link_ksettings = cpsw_set_link_ksettings,
.get_eee = cpsw_get_eee,
.set_eee = cpsw_set_eee,
.nway_reset = cpsw_nway_reset,
.get_ringparam = cpsw_get_ringparam,
.set_ringparam = cpsw_set_ringparam,
};
static int cpsw_probe_dt(struct cpsw_platform_data *data,
struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct device_node *slave_node;
int i = 0, ret;
u32 prop;
if (!node)
return -EINVAL;
if (of_property_read_u32(node, "slaves", &prop)) {
dev_err(&pdev->dev, "Missing slaves property in the DT.\n");
return -EINVAL;
}
data->slaves = prop;
if (of_property_read_u32(node, "active_slave", &prop)) {
dev_err(&pdev->dev, "Missing active_slave property in the DT.\n");
return -EINVAL;
}
data->active_slave = prop;
data->slave_data = devm_kcalloc(&pdev->dev,
data->slaves,
sizeof(struct cpsw_slave_data),
GFP_KERNEL);
if (!data->slave_data)
return -ENOMEM;
if (of_property_read_u32(node, "cpdma_channels", &prop)) {
dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n");
return -EINVAL;
}
data->channels = prop;
if (of_property_read_u32(node, "ale_entries", &prop)) {
dev_err(&pdev->dev, "Missing ale_entries property in the DT.\n");
return -EINVAL;
}
data->ale_entries = prop;
if (of_property_read_u32(node, "bd_ram_size", &prop)) {
dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n");
return -EINVAL;
}
data->bd_ram_size = prop;
if (of_property_read_u32(node, "mac_control", &prop)) {
dev_err(&pdev->dev, "Missing mac_control property in the DT.\n");
return -EINVAL;
}
data->mac_control = prop;
if (of_property_read_bool(node, "dual_emac"))
data->dual_emac = 1;
/*
* Populate all the child nodes here...
*/
ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
/* We do not want to force this, as in some cases may not have child */
if (ret)
dev_warn(&pdev->dev, "Doesn't have any child node\n");
for_each_available_child_of_node(node, slave_node) {
struct cpsw_slave_data *slave_data = data->slave_data + i;
const void *mac_addr = NULL;
int lenp;
const __be32 *parp;
/* This is no slave child node, continue */
if (!of_node_name_eq(slave_node, "slave"))
continue;
slave_data->ifphy = devm_of_phy_get(&pdev->dev, slave_node,
NULL);
if (!IS_ENABLED(CONFIG_TI_CPSW_PHY_SEL) &&
IS_ERR(slave_data->ifphy)) {
ret = PTR_ERR(slave_data->ifphy);
dev_err(&pdev->dev,
"%d: Error retrieving port phy: %d\n", i, ret);
return ret;
}
slave_data->phy_node = of_parse_phandle(slave_node,
"phy-handle", 0);
parp = of_get_property(slave_node, "phy_id", &lenp);
if (slave_data->phy_node) {
dev_dbg(&pdev->dev,
"slave[%d] using phy-handle=\"%pOF\"\n",
i, slave_data->phy_node);
} else if (of_phy_is_fixed_link(slave_node)) {
/* In the case of a fixed PHY, the DT node associated
* to the PHY is the Ethernet MAC DT node.
*/
ret = of_phy_register_fixed_link(slave_node);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev, "failed to register fixed-link phy: %d\n", ret);
return ret;
}
slave_data->phy_node = of_node_get(slave_node);
} else if (parp) {
u32 phyid;
struct device_node *mdio_node;
struct platform_device *mdio;
if (lenp != (sizeof(__be32) * 2)) {
dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i);
goto no_phy_slave;
}
mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
phyid = be32_to_cpup(parp+1);
mdio = of_find_device_by_node(mdio_node);
of_node_put(mdio_node);
if (!mdio) {
dev_err(&pdev->dev, "Missing mdio platform device\n");
return -EINVAL;
}
snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
PHY_ID_FMT, mdio->name, phyid);
put_device(&mdio->dev);
} else {
dev_err(&pdev->dev,
"No slave[%d] phy_id, phy-handle, or fixed-link property\n",
i);
goto no_phy_slave;
}
slave_data->phy_if = of_get_phy_mode(slave_node);
if (slave_data->phy_if < 0) {
dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
i);
return slave_data->phy_if;
}
no_phy_slave:
mac_addr = of_get_mac_address(slave_node);
if (!IS_ERR(mac_addr)) {
ether_addr_copy(slave_data->mac_addr, mac_addr);
} else {
ret = ti_cm_get_macid(&pdev->dev, i,
slave_data->mac_addr);
if (ret)
return ret;
}
if (data->dual_emac) {
if (of_property_read_u32(slave_node, "dual_emac_res_vlan",
&prop)) {
dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n");
slave_data->dual_emac_res_vlan = i+1;
dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n",
slave_data->dual_emac_res_vlan, i);
} else {
slave_data->dual_emac_res_vlan = prop;
}
}
i++;
if (i == data->slaves)
break;
}
return 0;
}
static void cpsw_remove_dt(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
struct cpsw_platform_data *data = &cpsw->data;
struct device_node *node = pdev->dev.of_node;
struct device_node *slave_node;
int i = 0;
for_each_available_child_of_node(node, slave_node) {
struct cpsw_slave_data *slave_data = &data->slave_data[i];
if (!of_node_name_eq(slave_node, "slave"))
continue;
if (of_phy_is_fixed_link(slave_node))
of_phy_deregister_fixed_link(slave_node);
of_node_put(slave_data->phy_node);
i++;
if (i == data->slaves)
break;
}
of_platform_depopulate(&pdev->dev);
}
static int cpsw_probe_dual_emac(struct cpsw_priv *priv)
{
struct cpsw_common *cpsw = priv->cpsw;
struct cpsw_platform_data *data = &cpsw->data;
struct net_device *ndev;
struct cpsw_priv *priv_sl2;
int ret = 0;
ndev = devm_alloc_etherdev_mqs(cpsw->dev, sizeof(struct cpsw_priv),
CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
if (!ndev) {
dev_err(cpsw->dev, "cpsw: error allocating net_device\n");
return -ENOMEM;
}
priv_sl2 = netdev_priv(ndev);
priv_sl2->cpsw = cpsw;
priv_sl2->ndev = ndev;
priv_sl2->dev = &ndev->dev;
priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
ETH_ALEN);
dev_info(cpsw->dev, "cpsw: Detected MACID = %pM\n",
priv_sl2->mac_addr);
} else {
eth_random_addr(priv_sl2->mac_addr);
dev_info(cpsw->dev, "cpsw: Random MACID = %pM\n",
priv_sl2->mac_addr);
}
memcpy(ndev->dev_addr, priv_sl2->mac_addr, ETH_ALEN);
priv_sl2->emac_port = 1;
cpsw->slaves[1].ndev = ndev;
ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
ndev->netdev_ops = &cpsw_netdev_ops;
ndev->ethtool_ops = &cpsw_ethtool_ops;
/* register the network device */
SET_NETDEV_DEV(ndev, cpsw->dev);
ret = register_netdev(ndev);
if (ret)
dev_err(cpsw->dev, "cpsw: error registering net device\n");
return ret;
}
static const struct of_device_id cpsw_of_mtable[] = {
{ .compatible = "ti,cpsw"},
{ .compatible = "ti,am335x-cpsw"},
{ .compatible = "ti,am4372-cpsw"},
{ .compatible = "ti,dra7-cpsw"},
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
static const struct soc_device_attribute cpsw_soc_devices[] = {
{ .family = "AM33xx", .revision = "ES1.0"},
{ /* sentinel */ }
};
static int cpsw_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct clk *clk;
struct cpsw_platform_data *data;
struct net_device *ndev;
struct cpsw_priv *priv;
void __iomem *ss_regs;
struct resource *res, *ss_res;
struct gpio_descs *mode;
const struct soc_device_attribute *soc;
struct cpsw_common *cpsw;
int ret = 0, ch;
int irq;
cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
if (!cpsw)
return -ENOMEM;
cpsw->dev = dev;
mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
if (IS_ERR(mode)) {
ret = PTR_ERR(mode);
dev_err(dev, "gpio request failed, ret %d\n", ret);
return ret;
}
clk = devm_clk_get(dev, "fck");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
dev_err(dev, "fck is not found %d\n", ret);
return ret;
}
cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
ss_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ss_regs = devm_ioremap_resource(dev, ss_res);
if (IS_ERR(ss_regs))
return PTR_ERR(ss_regs);
cpsw->regs = ss_regs;
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
cpsw->wr_regs = devm_ioremap_resource(dev, res);
if (IS_ERR(cpsw->wr_regs))
return PTR_ERR(cpsw->wr_regs);
/* RX IRQ */
irq = platform_get_irq(pdev, 1);
if (irq < 0)
return irq;
cpsw->irqs_table[0] = irq;
/* TX IRQ */
irq = platform_get_irq(pdev, 2);
if (irq < 0)
return irq;
cpsw->irqs_table[1] = irq;
/*
* This may be required here for child devices.
*/
pm_runtime_enable(dev);
/* Need to enable clocks with runtime PM api to access module
* registers
*/
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
pm_runtime_put_noidle(dev);
goto clean_runtime_disable_ret;
}
ret = cpsw_probe_dt(&cpsw->data, pdev);
if (ret)
goto clean_dt_ret;
soc = soc_device_match(cpsw_soc_devices);
if (soc)
cpsw->quirk_irq = 1;
data = &cpsw->data;
cpsw->slaves = devm_kcalloc(dev,
data->slaves, sizeof(struct cpsw_slave),
GFP_KERNEL);
if (!cpsw->slaves) {
ret = -ENOMEM;
goto clean_dt_ret;
}
cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE);
cpsw->descs_pool_size = descs_pool_size;
ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
ss_res->start + CPSW2_BD_OFFSET,
descs_pool_size);
if (ret)
goto clean_dt_ret;
ch = cpsw->quirk_irq ? 0 : 7;
cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
if (IS_ERR(cpsw->txv[0].ch)) {
dev_err(dev, "error initializing tx dma channel\n");
ret = PTR_ERR(cpsw->txv[0].ch);
goto clean_cpts;
}
cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
if (IS_ERR(cpsw->rxv[0].ch)) {
dev_err(dev, "error initializing rx dma channel\n");
ret = PTR_ERR(cpsw->rxv[0].ch);
goto clean_cpts;
}
cpsw_split_res(cpsw);
/* setup netdev */
ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
if (!ndev) {
dev_err(dev, "error allocating net_device\n");
goto clean_cpts;
}
platform_set_drvdata(pdev, ndev);
priv = netdev_priv(ndev);
priv->cpsw = cpsw;
priv->ndev = ndev;
priv->dev = dev;
priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
priv->emac_port = 0;
if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
dev_info(dev, "Detected MACID = %pM\n", priv->mac_addr);
} else {
eth_random_addr(priv->mac_addr);
dev_info(dev, "Random MACID = %pM\n", priv->mac_addr);
}
memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
cpsw->slaves[0].ndev = ndev;
ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
ndev->netdev_ops = &cpsw_netdev_ops;
ndev->ethtool_ops = &cpsw_ethtool_ops;
netif_napi_add(ndev, &cpsw->napi_rx,
cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll,
CPSW_POLL_WEIGHT);
netif_tx_napi_add(ndev, &cpsw->napi_tx,
cpsw->quirk_irq ? cpsw_tx_poll : cpsw_tx_mq_poll,
CPSW_POLL_WEIGHT);
/* register the network device */
SET_NETDEV_DEV(ndev, dev);
ret = register_netdev(ndev);
if (ret) {
dev_err(dev, "error registering net device\n");
ret = -ENODEV;
goto clean_cpts;
}
if (cpsw->data.dual_emac) {
ret = cpsw_probe_dual_emac(priv);
if (ret) {
cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
goto clean_unregister_netdev_ret;
}
}
/* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
* MISC IRQs which are always kept disabled with this driver so
* we will not request them.
*
* If anyone wants to implement support for those, make sure to
* first request and append them to irqs_table array.
*/
ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
0, dev_name(dev), cpsw);
if (ret < 0) {
dev_err(dev, "error attaching irq (%d)\n", ret);
goto clean_unregister_netdev_ret;
}
ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
0, dev_name(&pdev->dev), cpsw);
if (ret < 0) {
dev_err(dev, "error attaching irq (%d)\n", ret);
goto clean_unregister_netdev_ret;
}
cpsw_notice(priv, probe,
"initialized device (regs %pa, irq %d, pool size %d)\n",
&ss_res->start, cpsw->irqs_table[0], descs_pool_size);
pm_runtime_put(&pdev->dev);
return 0;
clean_unregister_netdev_ret:
unregister_netdev(ndev);
clean_cpts:
cpts_release(cpsw->cpts);
cpdma_ctlr_destroy(cpsw->dma);
clean_dt_ret:
cpsw_remove_dt(pdev);
pm_runtime_put_sync(&pdev->dev);
clean_runtime_disable_ret:
pm_runtime_disable(&pdev->dev);
return ret;
}
static int cpsw_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
int ret;
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0) {
pm_runtime_put_noidle(&pdev->dev);
return ret;
}
if (cpsw->data.dual_emac)
unregister_netdev(cpsw->slaves[1].ndev);
unregister_netdev(ndev);
cpts_release(cpsw->cpts);
cpdma_ctlr_destroy(cpsw->dma);
cpsw_remove_dt(pdev);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int cpsw_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
if (cpsw->data.dual_emac) {
int i;
for (i = 0; i < cpsw->data.slaves; i++) {
if (netif_running(cpsw->slaves[i].ndev))
cpsw_ndo_stop(cpsw->slaves[i].ndev);
}
} else {
if (netif_running(ndev))
cpsw_ndo_stop(ndev);
}
/* Select sleep pin state */
pinctrl_pm_select_sleep_state(dev);
return 0;
}
static int cpsw_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
/* Select default pin state */
pinctrl_pm_select_default_state(dev);
/* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
rtnl_lock();
if (cpsw->data.dual_emac) {
int i;
for (i = 0; i < cpsw->data.slaves; i++) {
if (netif_running(cpsw->slaves[i].ndev))
cpsw_ndo_open(cpsw->slaves[i].ndev);
}
} else {
if (netif_running(ndev))
cpsw_ndo_open(ndev);
}
rtnl_unlock();
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
static struct platform_driver cpsw_driver = {
.driver = {
.name = "cpsw",
.pm = &cpsw_pm_ops,
.of_match_table = cpsw_of_mtable,
},
.probe = cpsw_probe,
.remove = cpsw_remove,
};
module_platform_driver(cpsw_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
MODULE_DESCRIPTION("TI CPSW Ethernet driver");
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