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linux / linux / kernel / git / torvalds / linux / 603ea5e7ffa73c7fac07d8713d97285990695213 / . / drivers / net / ethernet / mediatek / mtk_eth_soc.c
blob: 1d36619c5ec91c46db03f6a695f5b66d2325cf42 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Copyright (C) 2009-2016 John Crispin <blogic@openwrt.org>
* Copyright (C) 2009-2016 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013-2016 Michael Lee <igvtee@gmail.com>
*/
#include <linux/of_device.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_address.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/if_vlan.h>
#include <linux/reset.h>
#include <linux/tcp.h>
#include <linux/interrupt.h>
#include <linux/pinctrl/devinfo.h>
#include <linux/phylink.h>
#include <linux/jhash.h>
#include <linux/bitfield.h>
#include <net/dsa.h>
#include "mtk_eth_soc.h"
#include "mtk_wed.h"
static int mtk_msg_level = -1;
module_param_named(msg_level, mtk_msg_level, int, 0);
MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
#define MTK_ETHTOOL_STAT(x) { #x, \
offsetof(struct mtk_hw_stats, x) / sizeof(u64) }
#define MTK_ETHTOOL_XDP_STAT(x) { #x, \
offsetof(struct mtk_hw_stats, xdp_stats.x) / \
sizeof(u64) }
static const struct mtk_reg_map mtk_reg_map = {
.tx_irq_mask = 0x1a1c,
.tx_irq_status = 0x1a18,
.pdma = {
.rx_ptr = 0x0900,
.rx_cnt_cfg = 0x0904,
.pcrx_ptr = 0x0908,
.glo_cfg = 0x0a04,
.rst_idx = 0x0a08,
.delay_irq = 0x0a0c,
.irq_status = 0x0a20,
.irq_mask = 0x0a28,
.int_grp = 0x0a50,
},
.qdma = {
.qtx_cfg = 0x1800,
.rx_ptr = 0x1900,
.rx_cnt_cfg = 0x1904,
.qcrx_ptr = 0x1908,
.glo_cfg = 0x1a04,
.rst_idx = 0x1a08,
.delay_irq = 0x1a0c,
.fc_th = 0x1a10,
.int_grp = 0x1a20,
.hred = 0x1a44,
.ctx_ptr = 0x1b00,
.dtx_ptr = 0x1b04,
.crx_ptr = 0x1b10,
.drx_ptr = 0x1b14,
.fq_head = 0x1b20,
.fq_tail = 0x1b24,
.fq_count = 0x1b28,
.fq_blen = 0x1b2c,
},
.gdm1_cnt = 0x2400,
.gdma_to_ppe = 0x4444,
.ppe_base = 0x0c00,
.wdma_base = {
[0] = 0x2800,
[1] = 0x2c00,
},
};
static const struct mtk_reg_map mt7628_reg_map = {
.tx_irq_mask = 0x0a28,
.tx_irq_status = 0x0a20,
.pdma = {
.rx_ptr = 0x0900,
.rx_cnt_cfg = 0x0904,
.pcrx_ptr = 0x0908,
.glo_cfg = 0x0a04,
.rst_idx = 0x0a08,
.delay_irq = 0x0a0c,
.irq_status = 0x0a20,
.irq_mask = 0x0a28,
.int_grp = 0x0a50,
},
};
static const struct mtk_reg_map mt7986_reg_map = {
.tx_irq_mask = 0x461c,
.tx_irq_status = 0x4618,
.pdma = {
.rx_ptr = 0x6100,
.rx_cnt_cfg = 0x6104,
.pcrx_ptr = 0x6108,
.glo_cfg = 0x6204,
.rst_idx = 0x6208,
.delay_irq = 0x620c,
.irq_status = 0x6220,
.irq_mask = 0x6228,
.int_grp = 0x6250,
},
.qdma = {
.qtx_cfg = 0x4400,
.rx_ptr = 0x4500,
.rx_cnt_cfg = 0x4504,
.qcrx_ptr = 0x4508,
.glo_cfg = 0x4604,
.rst_idx = 0x4608,
.delay_irq = 0x460c,
.fc_th = 0x4610,
.int_grp = 0x4620,
.hred = 0x4644,
.ctx_ptr = 0x4700,
.dtx_ptr = 0x4704,
.crx_ptr = 0x4710,
.drx_ptr = 0x4714,
.fq_head = 0x4720,
.fq_tail = 0x4724,
.fq_count = 0x4728,
.fq_blen = 0x472c,
},
.gdm1_cnt = 0x1c00,
.gdma_to_ppe = 0x3333,
.ppe_base = 0x2000,
.wdma_base = {
[0] = 0x4800,
[1] = 0x4c00,
},
};
/* strings used by ethtool */
static const struct mtk_ethtool_stats {
char str[ETH_GSTRING_LEN];
u32 offset;
} mtk_ethtool_stats[] = {
MTK_ETHTOOL_STAT(tx_bytes),
MTK_ETHTOOL_STAT(tx_packets),
MTK_ETHTOOL_STAT(tx_skip),
MTK_ETHTOOL_STAT(tx_collisions),
MTK_ETHTOOL_STAT(rx_bytes),
MTK_ETHTOOL_STAT(rx_packets),
MTK_ETHTOOL_STAT(rx_overflow),
MTK_ETHTOOL_STAT(rx_fcs_errors),
MTK_ETHTOOL_STAT(rx_short_errors),
MTK_ETHTOOL_STAT(rx_long_errors),
MTK_ETHTOOL_STAT(rx_checksum_errors),
MTK_ETHTOOL_STAT(rx_flow_control_packets),
MTK_ETHTOOL_XDP_STAT(rx_xdp_redirect),
MTK_ETHTOOL_XDP_STAT(rx_xdp_pass),
MTK_ETHTOOL_XDP_STAT(rx_xdp_drop),
MTK_ETHTOOL_XDP_STAT(rx_xdp_tx),
MTK_ETHTOOL_XDP_STAT(rx_xdp_tx_errors),
MTK_ETHTOOL_XDP_STAT(tx_xdp_xmit),
MTK_ETHTOOL_XDP_STAT(tx_xdp_xmit_errors),
};
static const char * const mtk_clks_source_name[] = {
"ethif", "sgmiitop", "esw", "gp0", "gp1", "gp2", "fe", "trgpll",
"sgmii_tx250m", "sgmii_rx250m", "sgmii_cdr_ref", "sgmii_cdr_fb",
"sgmii2_tx250m", "sgmii2_rx250m", "sgmii2_cdr_ref", "sgmii2_cdr_fb",
"sgmii_ck", "eth2pll", "wocpu0", "wocpu1", "netsys0", "netsys1"
};
void mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg)
{
__raw_writel(val, eth->base + reg);
}
u32 mtk_r32(struct mtk_eth *eth, unsigned reg)
{
return __raw_readl(eth->base + reg);
}
static u32 mtk_m32(struct mtk_eth *eth, u32 mask, u32 set, unsigned reg)
{
u32 val;
val = mtk_r32(eth, reg);
val &= ~mask;
val |= set;
mtk_w32(eth, val, reg);
return reg;
}
static int mtk_mdio_busy_wait(struct mtk_eth *eth)
{
unsigned long t_start = jiffies;
while (1) {
if (!(mtk_r32(eth, MTK_PHY_IAC) & PHY_IAC_ACCESS))
return 0;
if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT))
break;
cond_resched();
}
dev_err(eth->dev, "mdio: MDIO timeout\n");
return -ETIMEDOUT;
}
static int _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, u32 phy_reg,
u32 write_data)
{
int ret;
ret = mtk_mdio_busy_wait(eth);
if (ret < 0)
return ret;
if (phy_reg & MII_ADDR_C45) {
mtk_w32(eth, PHY_IAC_ACCESS |
PHY_IAC_START_C45 |
PHY_IAC_CMD_C45_ADDR |
PHY_IAC_REG(mdiobus_c45_devad(phy_reg)) |
PHY_IAC_ADDR(phy_addr) |
PHY_IAC_DATA(mdiobus_c45_regad(phy_reg)),
MTK_PHY_IAC);
ret = mtk_mdio_busy_wait(eth);
if (ret < 0)
return ret;
mtk_w32(eth, PHY_IAC_ACCESS |
PHY_IAC_START_C45 |
PHY_IAC_CMD_WRITE |
PHY_IAC_REG(mdiobus_c45_devad(phy_reg)) |
PHY_IAC_ADDR(phy_addr) |
PHY_IAC_DATA(write_data),
MTK_PHY_IAC);
} else {
mtk_w32(eth, PHY_IAC_ACCESS |
PHY_IAC_START_C22 |
PHY_IAC_CMD_WRITE |
PHY_IAC_REG(phy_reg) |
PHY_IAC_ADDR(phy_addr) |
PHY_IAC_DATA(write_data),
MTK_PHY_IAC);
}
ret = mtk_mdio_busy_wait(eth);
if (ret < 0)
return ret;
return 0;
}
static int _mtk_mdio_read(struct mtk_eth *eth, u32 phy_addr, u32 phy_reg)
{
int ret;
ret = mtk_mdio_busy_wait(eth);
if (ret < 0)
return ret;
if (phy_reg & MII_ADDR_C45) {
mtk_w32(eth, PHY_IAC_ACCESS |
PHY_IAC_START_C45 |
PHY_IAC_CMD_C45_ADDR |
PHY_IAC_REG(mdiobus_c45_devad(phy_reg)) |
PHY_IAC_ADDR(phy_addr) |
PHY_IAC_DATA(mdiobus_c45_regad(phy_reg)),
MTK_PHY_IAC);
ret = mtk_mdio_busy_wait(eth);
if (ret < 0)
return ret;
mtk_w32(eth, PHY_IAC_ACCESS |
PHY_IAC_START_C45 |
PHY_IAC_CMD_C45_READ |
PHY_IAC_REG(mdiobus_c45_devad(phy_reg)) |
PHY_IAC_ADDR(phy_addr),
MTK_PHY_IAC);
} else {
mtk_w32(eth, PHY_IAC_ACCESS |
PHY_IAC_START_C22 |
PHY_IAC_CMD_C22_READ |
PHY_IAC_REG(phy_reg) |
PHY_IAC_ADDR(phy_addr),
MTK_PHY_IAC);
}
ret = mtk_mdio_busy_wait(eth);
if (ret < 0)
return ret;
return mtk_r32(eth, MTK_PHY_IAC) & PHY_IAC_DATA_MASK;
}
static int mtk_mdio_write(struct mii_bus *bus, int phy_addr,
int phy_reg, u16 val)
{
struct mtk_eth *eth = bus->priv;
return _mtk_mdio_write(eth, phy_addr, phy_reg, val);
}
static int mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
{
struct mtk_eth *eth = bus->priv;
return _mtk_mdio_read(eth, phy_addr, phy_reg);
}
static int mt7621_gmac0_rgmii_adjust(struct mtk_eth *eth,
phy_interface_t interface)
{
u32 val;
/* Check DDR memory type.
* Currently TRGMII mode with DDR2 memory is not supported.
*/
regmap_read(eth->ethsys, ETHSYS_SYSCFG, &val);
if (interface == PHY_INTERFACE_MODE_TRGMII &&
val & SYSCFG_DRAM_TYPE_DDR2) {
dev_err(eth->dev,
"TRGMII mode with DDR2 memory is not supported!\n");
return -EOPNOTSUPP;
}
val = (interface == PHY_INTERFACE_MODE_TRGMII) ?
ETHSYS_TRGMII_MT7621_DDR_PLL : 0;
regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0,
ETHSYS_TRGMII_MT7621_MASK, val);
return 0;
}
static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth,
phy_interface_t interface, int speed)
{
u32 val;
int ret;
if (interface == PHY_INTERFACE_MODE_TRGMII) {
mtk_w32(eth, TRGMII_MODE, INTF_MODE);
val = 500000000;
ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val);
if (ret)
dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret);
return;
}
val = (speed == SPEED_1000) ?
INTF_MODE_RGMII_1000 : INTF_MODE_RGMII_10_100;
mtk_w32(eth, val, INTF_MODE);
regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0,
ETHSYS_TRGMII_CLK_SEL362_5,
ETHSYS_TRGMII_CLK_SEL362_5);
val = (speed == SPEED_1000) ? 250000000 : 500000000;
ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val);
if (ret)
dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret);
val = (speed == SPEED_1000) ?
RCK_CTRL_RGMII_1000 : RCK_CTRL_RGMII_10_100;
mtk_w32(eth, val, TRGMII_RCK_CTRL);
val = (speed == SPEED_1000) ?
TCK_CTRL_RGMII_1000 : TCK_CTRL_RGMII_10_100;
mtk_w32(eth, val, TRGMII_TCK_CTRL);
}
static struct phylink_pcs *mtk_mac_select_pcs(struct phylink_config *config,
phy_interface_t interface)
{
struct mtk_mac *mac = container_of(config, struct mtk_mac,
phylink_config);
struct mtk_eth *eth = mac->hw;
unsigned int sid;
if (interface == PHY_INTERFACE_MODE_SGMII ||
phy_interface_mode_is_8023z(interface)) {
sid = (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_SGMII)) ?
0 : mac->id;
return mtk_sgmii_select_pcs(eth->sgmii, sid);
}
return NULL;
}
static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state)
{
struct mtk_mac *mac = container_of(config, struct mtk_mac,
phylink_config);
struct mtk_eth *eth = mac->hw;
int val, ge_mode, err = 0;
u32 i;
/* MT76x8 has no hardware settings between for the MAC */
if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628) &&
mac->interface != state->interface) {
/* Setup soc pin functions */
switch (state->interface) {
case PHY_INTERFACE_MODE_TRGMII:
if (mac->id)
goto err_phy;
if (!MTK_HAS_CAPS(mac->hw->soc->caps,
MTK_GMAC1_TRGMII))
goto err_phy;
fallthrough;
case PHY_INTERFACE_MODE_RGMII_TXID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_REVMII:
case PHY_INTERFACE_MODE_RMII:
if (MTK_HAS_CAPS(eth->soc->caps, MTK_RGMII)) {
err = mtk_gmac_rgmii_path_setup(eth, mac->id);
if (err)
goto init_err;
}
break;
case PHY_INTERFACE_MODE_1000BASEX:
case PHY_INTERFACE_MODE_2500BASEX:
case PHY_INTERFACE_MODE_SGMII:
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) {
err = mtk_gmac_sgmii_path_setup(eth, mac->id);
if (err)
goto init_err;
}
break;
case PHY_INTERFACE_MODE_GMII:
if (MTK_HAS_CAPS(eth->soc->caps, MTK_GEPHY)) {
err = mtk_gmac_gephy_path_setup(eth, mac->id);
if (err)
goto init_err;
}
break;
default:
goto err_phy;
}
/* Setup clock for 1st gmac */
if (!mac->id && state->interface != PHY_INTERFACE_MODE_SGMII &&
!phy_interface_mode_is_8023z(state->interface) &&
MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GMAC1_TRGMII)) {
if (MTK_HAS_CAPS(mac->hw->soc->caps,
MTK_TRGMII_MT7621_CLK)) {
if (mt7621_gmac0_rgmii_adjust(mac->hw,
state->interface))
goto err_phy;
} else {
/* FIXME: this is incorrect. Not only does it
* use state->speed (which is not guaranteed
* to be correct) but it also makes use of it
* in a code path that will only be reachable
* when the PHY interface mode changes, not
* when the speed changes. Consequently, RGMII
* is probably broken.
*/
mtk_gmac0_rgmii_adjust(mac->hw,
state->interface,
state->speed);
/* mt7623_pad_clk_setup */
for (i = 0 ; i < NUM_TRGMII_CTRL; i++)
mtk_w32(mac->hw,
TD_DM_DRVP(8) | TD_DM_DRVN(8),
TRGMII_TD_ODT(i));
/* Assert/release MT7623 RXC reset */
mtk_m32(mac->hw, 0, RXC_RST | RXC_DQSISEL,
TRGMII_RCK_CTRL);
mtk_m32(mac->hw, RXC_RST, 0, TRGMII_RCK_CTRL);
}
}
ge_mode = 0;
switch (state->interface) {
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_GMII:
ge_mode = 1;
break;
case PHY_INTERFACE_MODE_REVMII:
ge_mode = 2;
break;
case PHY_INTERFACE_MODE_RMII:
if (mac->id)
goto err_phy;
ge_mode = 3;
break;
default:
break;
}
/* put the gmac into the right mode */
regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, mac->id);
val |= SYSCFG0_GE_MODE(ge_mode, mac->id);
regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val);
mac->interface = state->interface;
}
/* SGMII */
if (state->interface == PHY_INTERFACE_MODE_SGMII ||
phy_interface_mode_is_8023z(state->interface)) {
/* The path GMAC to SGMII will be enabled once the SGMIISYS is
* being setup done.
*/
regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
SYSCFG0_SGMII_MASK,
~(u32)SYSCFG0_SGMII_MASK);
/* Save the syscfg0 value for mac_finish */
mac->syscfg0 = val;
} else if (phylink_autoneg_inband(mode)) {
dev_err(eth->dev,
"In-band mode not supported in non SGMII mode!\n");
return;
}
return;
err_phy:
dev_err(eth->dev, "%s: GMAC%d mode %s not supported!\n", __func__,
mac->id, phy_modes(state->interface));
return;
init_err:
dev_err(eth->dev, "%s: GMAC%d mode %s err: %d!\n", __func__,
mac->id, phy_modes(state->interface), err);
}
static int mtk_mac_finish(struct phylink_config *config, unsigned int mode,
phy_interface_t interface)
{
struct mtk_mac *mac = container_of(config, struct mtk_mac,
phylink_config);
struct mtk_eth *eth = mac->hw;
u32 mcr_cur, mcr_new;
/* Enable SGMII */
if (interface == PHY_INTERFACE_MODE_SGMII ||
phy_interface_mode_is_8023z(interface))
regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
SYSCFG0_SGMII_MASK, mac->syscfg0);
/* Setup gmac */
mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
mcr_new = mcr_cur;
mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE |
MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK;
/* Only update control register when needed! */
if (mcr_new != mcr_cur)
mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id));
return 0;
}
static void mtk_mac_pcs_get_state(struct phylink_config *config,
struct phylink_link_state *state)
{
struct mtk_mac *mac = container_of(config, struct mtk_mac,
phylink_config);
u32 pmsr = mtk_r32(mac->hw, MTK_MAC_MSR(mac->id));
state->link = (pmsr & MAC_MSR_LINK);
state->duplex = (pmsr & MAC_MSR_DPX) >> 1;
switch (pmsr & (MAC_MSR_SPEED_1000 | MAC_MSR_SPEED_100)) {
case 0:
state->speed = SPEED_10;
break;
case MAC_MSR_SPEED_100:
state->speed = SPEED_100;
break;
case MAC_MSR_SPEED_1000:
state->speed = SPEED_1000;
break;
default:
state->speed = SPEED_UNKNOWN;
break;
}
state->pause &= (MLO_PAUSE_RX | MLO_PAUSE_TX);
if (pmsr & MAC_MSR_RX_FC)
state->pause |= MLO_PAUSE_RX;
if (pmsr & MAC_MSR_TX_FC)
state->pause |= MLO_PAUSE_TX;
}
static void mtk_mac_link_down(struct phylink_config *config, unsigned int mode,
phy_interface_t interface)
{
struct mtk_mac *mac = container_of(config, struct mtk_mac,
phylink_config);
u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN);
mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
}
static void mtk_mac_link_up(struct phylink_config *config,
struct phy_device *phy,
unsigned int mode, phy_interface_t interface,
int speed, int duplex, bool tx_pause, bool rx_pause)
{
struct mtk_mac *mac = container_of(config, struct mtk_mac,
phylink_config);
u32 mcr;
mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
mcr &= ~(MAC_MCR_SPEED_100 | MAC_MCR_SPEED_1000 |
MAC_MCR_FORCE_DPX | MAC_MCR_FORCE_TX_FC |
MAC_MCR_FORCE_RX_FC);
/* Configure speed */
switch (speed) {
case SPEED_2500:
case SPEED_1000:
mcr |= MAC_MCR_SPEED_1000;
break;
case SPEED_100:
mcr |= MAC_MCR_SPEED_100;
break;
}
/* Configure duplex */
if (duplex == DUPLEX_FULL)
mcr |= MAC_MCR_FORCE_DPX;
/* Configure pause modes - phylink will avoid these for half duplex */
if (tx_pause)
mcr |= MAC_MCR_FORCE_TX_FC;
if (rx_pause)
mcr |= MAC_MCR_FORCE_RX_FC;
mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN;
mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
}
static const struct phylink_mac_ops mtk_phylink_ops = {
.validate = phylink_generic_validate,
.mac_select_pcs = mtk_mac_select_pcs,
.mac_pcs_get_state = mtk_mac_pcs_get_state,
.mac_config = mtk_mac_config,
.mac_finish = mtk_mac_finish,
.mac_link_down = mtk_mac_link_down,
.mac_link_up = mtk_mac_link_up,
};
static int mtk_mdio_init(struct mtk_eth *eth)
{
struct device_node *mii_np;
int ret;
mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus");
if (!mii_np) {
dev_err(eth->dev, "no %s child node found", "mdio-bus");
return -ENODEV;
}
if (!of_device_is_available(mii_np)) {
ret = -ENODEV;
goto err_put_node;
}
eth->mii_bus = devm_mdiobus_alloc(eth->dev);
if (!eth->mii_bus) {
ret = -ENOMEM;
goto err_put_node;
}
eth->mii_bus->name = "mdio";
eth->mii_bus->read = mtk_mdio_read;
eth->mii_bus->write = mtk_mdio_write;
eth->mii_bus->probe_capabilities = MDIOBUS_C22_C45;
eth->mii_bus->priv = eth;
eth->mii_bus->parent = eth->dev;
snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%pOFn", mii_np);
ret = of_mdiobus_register(eth->mii_bus, mii_np);
err_put_node:
of_node_put(mii_np);
return ret;
}
static void mtk_mdio_cleanup(struct mtk_eth *eth)
{
if (!eth->mii_bus)
return;
mdiobus_unregister(eth->mii_bus);
}
static inline void mtk_tx_irq_disable(struct mtk_eth *eth, u32 mask)
{
unsigned long flags;
u32 val;
spin_lock_irqsave(&eth->tx_irq_lock, flags);
val = mtk_r32(eth, eth->soc->reg_map->tx_irq_mask);
mtk_w32(eth, val & ~mask, eth->soc->reg_map->tx_irq_mask);
spin_unlock_irqrestore(&eth->tx_irq_lock, flags);
}
static inline void mtk_tx_irq_enable(struct mtk_eth *eth, u32 mask)
{
unsigned long flags;
u32 val;
spin_lock_irqsave(&eth->tx_irq_lock, flags);
val = mtk_r32(eth, eth->soc->reg_map->tx_irq_mask);
mtk_w32(eth, val | mask, eth->soc->reg_map->tx_irq_mask);
spin_unlock_irqrestore(&eth->tx_irq_lock, flags);
}
static inline void mtk_rx_irq_disable(struct mtk_eth *eth, u32 mask)
{
unsigned long flags;
u32 val;
spin_lock_irqsave(&eth->rx_irq_lock, flags);
val = mtk_r32(eth, eth->soc->reg_map->pdma.irq_mask);
mtk_w32(eth, val & ~mask, eth->soc->reg_map->pdma.irq_mask);
spin_unlock_irqrestore(&eth->rx_irq_lock, flags);
}
static inline void mtk_rx_irq_enable(struct mtk_eth *eth, u32 mask)
{
unsigned long flags;
u32 val;
spin_lock_irqsave(&eth->rx_irq_lock, flags);
val = mtk_r32(eth, eth->soc->reg_map->pdma.irq_mask);
mtk_w32(eth, val | mask, eth->soc->reg_map->pdma.irq_mask);
spin_unlock_irqrestore(&eth->rx_irq_lock, flags);
}
static int mtk_set_mac_address(struct net_device *dev, void *p)
{
int ret = eth_mac_addr(dev, p);
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
const char *macaddr = dev->dev_addr;
if (ret)
return ret;
if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state)))
return -EBUSY;
spin_lock_bh(&mac->hw->page_lock);
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1],
MT7628_SDM_MAC_ADRH);
mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) |
(macaddr[4] << 8) | macaddr[5],
MT7628_SDM_MAC_ADRL);
} else {
mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1],
MTK_GDMA_MAC_ADRH(mac->id));
mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) |
(macaddr[4] << 8) | macaddr[5],
MTK_GDMA_MAC_ADRL(mac->id));
}
spin_unlock_bh(&mac->hw->page_lock);
return 0;
}
void mtk_stats_update_mac(struct mtk_mac *mac)
{
struct mtk_hw_stats *hw_stats = mac->hw_stats;
struct mtk_eth *eth = mac->hw;
u64_stats_update_begin(&hw_stats->syncp);
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
hw_stats->tx_packets += mtk_r32(mac->hw, MT7628_SDM_TPCNT);
hw_stats->tx_bytes += mtk_r32(mac->hw, MT7628_SDM_TBCNT);
hw_stats->rx_packets += mtk_r32(mac->hw, MT7628_SDM_RPCNT);
hw_stats->rx_bytes += mtk_r32(mac->hw, MT7628_SDM_RBCNT);
hw_stats->rx_checksum_errors +=
mtk_r32(mac->hw, MT7628_SDM_CS_ERR);
} else {
const struct mtk_reg_map *reg_map = eth->soc->reg_map;
unsigned int offs = hw_stats->reg_offset;
u64 stats;
hw_stats->rx_bytes += mtk_r32(mac->hw, reg_map->gdm1_cnt + offs);
stats = mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x4 + offs);
if (stats)
hw_stats->rx_bytes += (stats << 32);
hw_stats->rx_packets +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x8 + offs);
hw_stats->rx_overflow +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x10 + offs);
hw_stats->rx_fcs_errors +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x14 + offs);
hw_stats->rx_short_errors +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x18 + offs);
hw_stats->rx_long_errors +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x1c + offs);
hw_stats->rx_checksum_errors +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x20 + offs);
hw_stats->rx_flow_control_packets +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x24 + offs);
hw_stats->tx_skip +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x28 + offs);
hw_stats->tx_collisions +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x2c + offs);
hw_stats->tx_bytes +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x30 + offs);
stats = mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x34 + offs);
if (stats)
hw_stats->tx_bytes += (stats << 32);
hw_stats->tx_packets +=
mtk_r32(mac->hw, reg_map->gdm1_cnt + 0x38 + offs);
}
u64_stats_update_end(&hw_stats->syncp);
}
static void mtk_stats_update(struct mtk_eth *eth)
{
int i;
for (i = 0; i < MTK_MAC_COUNT; i++) {
if (!eth->mac[i] || !eth->mac[i]->hw_stats)
continue;
if (spin_trylock(&eth->mac[i]->hw_stats->stats_lock)) {
mtk_stats_update_mac(eth->mac[i]);
spin_unlock(&eth->mac[i]->hw_stats->stats_lock);
}
}
}
static void mtk_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *storage)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_hw_stats *hw_stats = mac->hw_stats;
unsigned int start;
if (netif_running(dev) && netif_device_present(dev)) {
if (spin_trylock_bh(&hw_stats->stats_lock)) {
mtk_stats_update_mac(mac);
spin_unlock_bh(&hw_stats->stats_lock);
}
}
do {
start = u64_stats_fetch_begin_irq(&hw_stats->syncp);
storage->rx_packets = hw_stats->rx_packets;
storage->tx_packets = hw_stats->tx_packets;
storage->rx_bytes = hw_stats->rx_bytes;
storage->tx_bytes = hw_stats->tx_bytes;
storage->collisions = hw_stats->tx_collisions;
storage->rx_length_errors = hw_stats->rx_short_errors +
hw_stats->rx_long_errors;
storage->rx_over_errors = hw_stats->rx_overflow;
storage->rx_crc_errors = hw_stats->rx_fcs_errors;
storage->rx_errors = hw_stats->rx_checksum_errors;
storage->tx_aborted_errors = hw_stats->tx_skip;
} while (u64_stats_fetch_retry_irq(&hw_stats->syncp, start));
storage->tx_errors = dev->stats.tx_errors;
storage->rx_dropped = dev->stats.rx_dropped;
storage->tx_dropped = dev->stats.tx_dropped;
}
static inline int mtk_max_frag_size(int mtu)
{
/* make sure buf_size will be at least MTK_MAX_RX_LENGTH */
if (mtu + MTK_RX_ETH_HLEN < MTK_MAX_RX_LENGTH_2K)
mtu = MTK_MAX_RX_LENGTH_2K - MTK_RX_ETH_HLEN;
return SKB_DATA_ALIGN(MTK_RX_HLEN + mtu) +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
}
static inline int mtk_max_buf_size(int frag_size)
{
int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN -
SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
WARN_ON(buf_size < MTK_MAX_RX_LENGTH_2K);
return buf_size;
}
static bool mtk_rx_get_desc(struct mtk_eth *eth, struct mtk_rx_dma_v2 *rxd,
struct mtk_rx_dma_v2 *dma_rxd)
{
rxd->rxd2 = READ_ONCE(dma_rxd->rxd2);
if (!(rxd->rxd2 & RX_DMA_DONE))
return false;
rxd->rxd1 = READ_ONCE(dma_rxd->rxd1);
rxd->rxd3 = READ_ONCE(dma_rxd->rxd3);
rxd->rxd4 = READ_ONCE(dma_rxd->rxd4);
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
rxd->rxd5 = READ_ONCE(dma_rxd->rxd5);
rxd->rxd6 = READ_ONCE(dma_rxd->rxd6);
}
return true;
}
static void *mtk_max_lro_buf_alloc(gfp_t gfp_mask)
{
unsigned int size = mtk_max_frag_size(MTK_MAX_LRO_RX_LENGTH);
unsigned long data;
data = __get_free_pages(gfp_mask | __GFP_COMP | __GFP_NOWARN,
get_order(size));
return (void *)data;
}
/* the qdma core needs scratch memory to be setup */
static int mtk_init_fq_dma(struct mtk_eth *eth)
{
const struct mtk_soc_data *soc = eth->soc;
dma_addr_t phy_ring_tail;
int cnt = MTK_DMA_SIZE;
dma_addr_t dma_addr;
int i;
eth->scratch_ring = dma_alloc_coherent(eth->dma_dev,
cnt * soc->txrx.txd_size,
&eth->phy_scratch_ring,
GFP_KERNEL);
if (unlikely(!eth->scratch_ring))
return -ENOMEM;
eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE, GFP_KERNEL);
if (unlikely(!eth->scratch_head))
return -ENOMEM;
dma_addr = dma_map_single(eth->dma_dev,
eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(eth->dma_dev, dma_addr)))
return -ENOMEM;
phy_ring_tail = eth->phy_scratch_ring + soc->txrx.txd_size * (cnt - 1);
for (i = 0; i < cnt; i++) {
struct mtk_tx_dma_v2 *txd;
txd = eth->scratch_ring + i * soc->txrx.txd_size;
txd->txd1 = dma_addr + i * MTK_QDMA_PAGE_SIZE;
if (i < cnt - 1)
txd->txd2 = eth->phy_scratch_ring +
(i + 1) * soc->txrx.txd_size;
txd->txd3 = TX_DMA_PLEN0(MTK_QDMA_PAGE_SIZE);
txd->txd4 = 0;
if (MTK_HAS_CAPS(soc->caps, MTK_NETSYS_V2)) {
txd->txd5 = 0;
txd->txd6 = 0;
txd->txd7 = 0;
txd->txd8 = 0;
}
}
mtk_w32(eth, eth->phy_scratch_ring, soc->reg_map->qdma.fq_head);
mtk_w32(eth, phy_ring_tail, soc->reg_map->qdma.fq_tail);
mtk_w32(eth, (cnt << 16) | cnt, soc->reg_map->qdma.fq_count);
mtk_w32(eth, MTK_QDMA_PAGE_SIZE << 16, soc->reg_map->qdma.fq_blen);
return 0;
}
static void *mtk_qdma_phys_to_virt(struct mtk_tx_ring *ring, u32 desc)
{
return ring->dma + (desc - ring->phys);
}
static struct mtk_tx_buf *mtk_desc_to_tx_buf(struct mtk_tx_ring *ring,
void *txd, u32 txd_size)
{
int idx = (txd - ring->dma) / txd_size;
return &ring->buf[idx];
}
static struct mtk_tx_dma *qdma_to_pdma(struct mtk_tx_ring *ring,
struct mtk_tx_dma *dma)
{
return ring->dma_pdma - (struct mtk_tx_dma *)ring->dma + dma;
}
static int txd_to_idx(struct mtk_tx_ring *ring, void *dma, u32 txd_size)
{
return (dma - ring->dma) / txd_size;
}
static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf,
struct xdp_frame_bulk *bq, bool napi)
{
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
if (tx_buf->flags & MTK_TX_FLAGS_SINGLE0) {
dma_unmap_single(eth->dma_dev,
dma_unmap_addr(tx_buf, dma_addr0),
dma_unmap_len(tx_buf, dma_len0),
DMA_TO_DEVICE);
} else if (tx_buf->flags & MTK_TX_FLAGS_PAGE0) {
dma_unmap_page(eth->dma_dev,
dma_unmap_addr(tx_buf, dma_addr0),
dma_unmap_len(tx_buf, dma_len0),
DMA_TO_DEVICE);
}
} else {
if (dma_unmap_len(tx_buf, dma_len0)) {
dma_unmap_page(eth->dma_dev,
dma_unmap_addr(tx_buf, dma_addr0),
dma_unmap_len(tx_buf, dma_len0),
DMA_TO_DEVICE);
}
if (dma_unmap_len(tx_buf, dma_len1)) {
dma_unmap_page(eth->dma_dev,
dma_unmap_addr(tx_buf, dma_addr1),
dma_unmap_len(tx_buf, dma_len1),
DMA_TO_DEVICE);
}
}
if (tx_buf->data && tx_buf->data != (void *)MTK_DMA_DUMMY_DESC) {
if (tx_buf->type == MTK_TYPE_SKB) {
struct sk_buff *skb = tx_buf->data;
if (napi)
napi_consume_skb(skb, napi);
else
dev_kfree_skb_any(skb);
} else {
struct xdp_frame *xdpf = tx_buf->data;
if (napi && tx_buf->type == MTK_TYPE_XDP_TX)
xdp_return_frame_rx_napi(xdpf);
else if (bq)
xdp_return_frame_bulk(xdpf, bq);
else
xdp_return_frame(xdpf);
}
}
tx_buf->flags = 0;
tx_buf->data = NULL;
}
static void setup_tx_buf(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf,
struct mtk_tx_dma *txd, dma_addr_t mapped_addr,
size_t size, int idx)
{
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr);
dma_unmap_len_set(tx_buf, dma_len0, size);
} else {
if (idx & 1) {
txd->txd3 = mapped_addr;
txd->txd2 |= TX_DMA_PLEN1(size);
dma_unmap_addr_set(tx_buf, dma_addr1, mapped_addr);
dma_unmap_len_set(tx_buf, dma_len1, size);
} else {
tx_buf->data = (void *)MTK_DMA_DUMMY_DESC;
txd->txd1 = mapped_addr;
txd->txd2 = TX_DMA_PLEN0(size);
dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr);
dma_unmap_len_set(tx_buf, dma_len0, size);
}
}
}
static void mtk_tx_set_dma_desc_v1(struct net_device *dev, void *txd,
struct mtk_tx_dma_desc_info *info)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
struct mtk_tx_dma *desc = txd;
u32 data;
WRITE_ONCE(desc->txd1, info->addr);
data = TX_DMA_SWC | TX_DMA_PLEN0(info->size);
if (info->last)
data |= TX_DMA_LS0;
WRITE_ONCE(desc->txd3, data);
data = (mac->id + 1) << TX_DMA_FPORT_SHIFT; /* forward port */
if (info->first) {
if (info->gso)
data |= TX_DMA_TSO;
/* tx checksum offload */
if (info->csum)
data |= TX_DMA_CHKSUM;
/* vlan header offload */
if (info->vlan)
data |= TX_DMA_INS_VLAN | info->vlan_tci;
}
WRITE_ONCE(desc->txd4, data);
}
static void mtk_tx_set_dma_desc_v2(struct net_device *dev, void *txd,
struct mtk_tx_dma_desc_info *info)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_tx_dma_v2 *desc = txd;
struct mtk_eth *eth = mac->hw;
u32 data;
WRITE_ONCE(desc->txd1, info->addr);
data = TX_DMA_PLEN0(info->size);
if (info->last)
data |= TX_DMA_LS0;
WRITE_ONCE(desc->txd3, data);
if (!info->qid && mac->id)
info->qid = MTK_QDMA_GMAC2_QID;
data = (mac->id + 1) << TX_DMA_FPORT_SHIFT_V2; /* forward port */
data |= TX_DMA_SWC_V2 | QID_BITS_V2(info->qid);
WRITE_ONCE(desc->txd4, data);
data = 0;
if (info->first) {
if (info->gso)
data |= TX_DMA_TSO_V2;
/* tx checksum offload */
if (info->csum)
data |= TX_DMA_CHKSUM_V2;
}
WRITE_ONCE(desc->txd5, data);
data = 0;
if (info->first && info->vlan)
data |= TX_DMA_INS_VLAN_V2 | info->vlan_tci;
WRITE_ONCE(desc->txd6, data);
WRITE_ONCE(desc->txd7, 0);
WRITE_ONCE(desc->txd8, 0);
}
static void mtk_tx_set_dma_desc(struct net_device *dev, void *txd,
struct mtk_tx_dma_desc_info *info)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2))
mtk_tx_set_dma_desc_v2(dev, txd, info);
else
mtk_tx_set_dma_desc_v1(dev, txd, info);
}
static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev,
int tx_num, struct mtk_tx_ring *ring, bool gso)
{
struct mtk_tx_dma_desc_info txd_info = {
.size = skb_headlen(skb),
.gso = gso,
.csum = skb->ip_summed == CHECKSUM_PARTIAL,
.vlan = skb_vlan_tag_present(skb),
.qid = skb->mark & MTK_QDMA_TX_MASK,
.vlan_tci = skb_vlan_tag_get(skb),
.first = true,
.last = !skb_is_nonlinear(skb),
};
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
const struct mtk_soc_data *soc = eth->soc;
struct mtk_tx_dma *itxd, *txd;
struct mtk_tx_dma *itxd_pdma, *txd_pdma;
struct mtk_tx_buf *itx_buf, *tx_buf;
int i, n_desc = 1;
int k = 0;
itxd = ring->next_free;
itxd_pdma = qdma_to_pdma(ring, itxd);
if (itxd == ring->last_free)
return -ENOMEM;
itx_buf = mtk_desc_to_tx_buf(ring, itxd, soc->txrx.txd_size);
memset(itx_buf, 0, sizeof(*itx_buf));
txd_info.addr = dma_map_single(eth->dma_dev, skb->data, txd_info.size,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(eth->dma_dev, txd_info.addr)))
return -ENOMEM;
mtk_tx_set_dma_desc(dev, itxd, &txd_info);
itx_buf->flags |= MTK_TX_FLAGS_SINGLE0;
itx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 :
MTK_TX_FLAGS_FPORT1;
setup_tx_buf(eth, itx_buf, itxd_pdma, txd_info.addr, txd_info.size,
k++);
/* TX SG offload */
txd = itxd;
txd_pdma = qdma_to_pdma(ring, txd);
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
unsigned int offset = 0;
int frag_size = skb_frag_size(frag);
while (frag_size) {
bool new_desc = true;
if (MTK_HAS_CAPS(soc->caps, MTK_QDMA) ||
(i & 0x1)) {
txd = mtk_qdma_phys_to_virt(ring, txd->txd2);
txd_pdma = qdma_to_pdma(ring, txd);
if (txd == ring->last_free)
goto err_dma;
n_desc++;
} else {
new_desc = false;
}
memset(&txd_info, 0, sizeof(struct mtk_tx_dma_desc_info));
txd_info.size = min_t(unsigned int, frag_size,
soc->txrx.dma_max_len);
txd_info.qid = skb->mark & MTK_QDMA_TX_MASK;
txd_info.last = i == skb_shinfo(skb)->nr_frags - 1 &&
!(frag_size - txd_info.size);
txd_info.addr = skb_frag_dma_map(eth->dma_dev, frag,
offset, txd_info.size,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(eth->dma_dev, txd_info.addr)))
goto err_dma;
mtk_tx_set_dma_desc(dev, txd, &txd_info);
tx_buf = mtk_desc_to_tx_buf(ring, txd,
soc->txrx.txd_size);
if (new_desc)
memset(tx_buf, 0, sizeof(*tx_buf));
tx_buf->data = (void *)MTK_DMA_DUMMY_DESC;
tx_buf->flags |= MTK_TX_FLAGS_PAGE0;
tx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 :
MTK_TX_FLAGS_FPORT1;
setup_tx_buf(eth, tx_buf, txd_pdma, txd_info.addr,
txd_info.size, k++);
frag_size -= txd_info.size;
offset += txd_info.size;
}
}
/* store skb to cleanup */
itx_buf->type = MTK_TYPE_SKB;
itx_buf->data = skb;
if (!MTK_HAS_CAPS(soc->caps, MTK_QDMA)) {
if (k & 0x1)
txd_pdma->txd2 |= TX_DMA_LS0;
else
txd_pdma->txd2 |= TX_DMA_LS1;
}
netdev_sent_queue(dev, skb->len);
skb_tx_timestamp(skb);
ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2);
atomic_sub(n_desc, &ring->free_count);
/* make sure that all changes to the dma ring are flushed before we
* continue
*/
wmb();
if (MTK_HAS_CAPS(soc->caps, MTK_QDMA)) {
if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) ||
!netdev_xmit_more())
mtk_w32(eth, txd->txd2, soc->reg_map->qdma.ctx_ptr);
} else {
int next_idx;
next_idx = NEXT_DESP_IDX(txd_to_idx(ring, txd, soc->txrx.txd_size),
ring->dma_size);
mtk_w32(eth, next_idx, MT7628_TX_CTX_IDX0);
}
return 0;
err_dma:
do {
tx_buf = mtk_desc_to_tx_buf(ring, itxd, soc->txrx.txd_size);
/* unmap dma */
mtk_tx_unmap(eth, tx_buf, NULL, false);
itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU;
if (!MTK_HAS_CAPS(soc->caps, MTK_QDMA))
itxd_pdma->txd2 = TX_DMA_DESP2_DEF;
itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2);
itxd_pdma = qdma_to_pdma(ring, itxd);
} while (itxd != txd);
return -ENOMEM;
}
static int mtk_cal_txd_req(struct mtk_eth *eth, struct sk_buff *skb)
{
int i, nfrags = 1;
skb_frag_t *frag;
if (skb_is_gso(skb)) {
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
frag = &skb_shinfo(skb)->frags[i];
nfrags += DIV_ROUND_UP(skb_frag_size(frag),
eth->soc->txrx.dma_max_len);
}
} else {
nfrags += skb_shinfo(skb)->nr_frags;
}
return nfrags;
}
static int mtk_queue_stopped(struct mtk_eth *eth)
{
int i;
for (i = 0; i < MTK_MAC_COUNT; i++) {
if (!eth->netdev[i])
continue;
if (netif_queue_stopped(eth->netdev[i]))
return 1;
}
return 0;
}
static void mtk_wake_queue(struct mtk_eth *eth)
{
int i;
for (i = 0; i < MTK_MAC_COUNT; i++) {
if (!eth->netdev[i])
continue;
netif_wake_queue(eth->netdev[i]);
}
}
static netdev_tx_t mtk_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
struct mtk_tx_ring *ring = &eth->tx_ring;
struct net_device_stats *stats = &dev->stats;
bool gso = false;
int tx_num;
/* normally we can rely on the stack not calling this more than once,
* however we have 2 queues running on the same ring so we need to lock
* the ring access
*/
spin_lock(&eth->page_lock);
if (unlikely(test_bit(MTK_RESETTING, &eth->state)))
goto drop;
tx_num = mtk_cal_txd_req(eth, skb);
if (unlikely(atomic_read(&ring->free_count) <= tx_num)) {
netif_stop_queue(dev);
netif_err(eth, tx_queued, dev,
"Tx Ring full when queue awake!\n");
spin_unlock(&eth->page_lock);
return NETDEV_TX_BUSY;
}
/* TSO: fill MSS info in tcp checksum field */
if (skb_is_gso(skb)) {
if (skb_cow_head(skb, 0)) {
netif_warn(eth, tx_err, dev,
"GSO expand head fail.\n");
goto drop;
}
if (skb_shinfo(skb)->gso_type &
(SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
gso = true;
tcp_hdr(skb)->check = htons(skb_shinfo(skb)->gso_size);
}
}
if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0)
goto drop;
if (unlikely(atomic_read(&ring->free_count) <= ring->thresh))
netif_stop_queue(dev);
spin_unlock(&eth->page_lock);
return NETDEV_TX_OK;
drop:
spin_unlock(&eth->page_lock);
stats->tx_dropped++;
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
static struct mtk_rx_ring *mtk_get_rx_ring(struct mtk_eth *eth)
{
int i;
struct mtk_rx_ring *ring;
int idx;
if (!eth->hwlro)
return &eth->rx_ring[0];
for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) {
struct mtk_rx_dma *rxd;
ring = &eth->rx_ring[i];
idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size);
rxd = ring->dma + idx * eth->soc->txrx.rxd_size;
if (rxd->rxd2 & RX_DMA_DONE) {
ring->calc_idx_update = true;
return ring;
}
}
return NULL;
}
static void mtk_update_rx_cpu_idx(struct mtk_eth *eth)
{
struct mtk_rx_ring *ring;
int i;
if (!eth->hwlro) {
ring = &eth->rx_ring[0];
mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg);
} else {
for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) {
ring = &eth->rx_ring[i];
if (ring->calc_idx_update) {
ring->calc_idx_update = false;
mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg);
}
}
}
}
static bool mtk_page_pool_enabled(struct mtk_eth *eth)
{
return MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2);
}
static struct page_pool *mtk_create_page_pool(struct mtk_eth *eth,
struct xdp_rxq_info *xdp_q,
int id, int size)
{
struct page_pool_params pp_params = {
.order = 0,
.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
.pool_size = size,
.nid = NUMA_NO_NODE,
.dev = eth->dma_dev,
.offset = MTK_PP_HEADROOM,
.max_len = MTK_PP_MAX_BUF_SIZE,
};
struct page_pool *pp;
int err;
pp_params.dma_dir = rcu_access_pointer(eth->prog) ? DMA_BIDIRECTIONAL
: DMA_FROM_DEVICE;
pp = page_pool_create(&pp_params);
if (IS_ERR(pp))
return pp;
err = __xdp_rxq_info_reg(xdp_q, &eth->dummy_dev, eth->rx_napi.napi_id,
id, PAGE_SIZE);
if (err < 0)
goto err_free_pp;
err = xdp_rxq_info_reg_mem_model(xdp_q, MEM_TYPE_PAGE_POOL, pp);
if (err)
goto err_unregister_rxq;
return pp;
err_unregister_rxq:
xdp_rxq_info_unreg(xdp_q);
err_free_pp:
page_pool_destroy(pp);
return ERR_PTR(err);
}
static void *mtk_page_pool_get_buff(struct page_pool *pp, dma_addr_t *dma_addr,
gfp_t gfp_mask)
{
struct page *page;
page = page_pool_alloc_pages(pp, gfp_mask | __GFP_NOWARN);
if (!page)
return NULL;
*dma_addr = page_pool_get_dma_addr(page) + MTK_PP_HEADROOM;
return page_address(page);
}
static void mtk_rx_put_buff(struct mtk_rx_ring *ring, void *data, bool napi)
{
if (ring->page_pool)
page_pool_put_full_page(ring->page_pool,
virt_to_head_page(data), napi);
else
skb_free_frag(data);
}
static int mtk_xdp_frame_map(struct mtk_eth *eth, struct net_device *dev,
struct mtk_tx_dma_desc_info *txd_info,
struct mtk_tx_dma *txd, struct mtk_tx_buf *tx_buf,
void *data, u16 headroom, int index, bool dma_map)
{
struct mtk_tx_ring *ring = &eth->tx_ring;
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_tx_dma *txd_pdma;
if (dma_map) { /* ndo_xdp_xmit */
txd_info->addr = dma_map_single(eth->dma_dev, data,
txd_info->size, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(eth->dma_dev, txd_info->addr)))
return -ENOMEM;
tx_buf->flags |= MTK_TX_FLAGS_SINGLE0;
} else {
struct page *page = virt_to_head_page(data);
txd_info->addr = page_pool_get_dma_addr(page) +
sizeof(struct xdp_frame) + headroom;
dma_sync_single_for_device(eth->dma_dev, txd_info->addr,
txd_info->size, DMA_BIDIRECTIONAL);
}
mtk_tx_set_dma_desc(dev, txd, txd_info);
tx_buf->flags |= !mac->id ? MTK_TX_FLAGS_FPORT0 : MTK_TX_FLAGS_FPORT1;
tx_buf->type = dma_map ? MTK_TYPE_XDP_NDO : MTK_TYPE_XDP_TX;
tx_buf->data = (void *)MTK_DMA_DUMMY_DESC;
txd_pdma = qdma_to_pdma(ring, txd);
setup_tx_buf(eth, tx_buf, txd_pdma, txd_info->addr, txd_info->size,
index);
return 0;
}
static int mtk_xdp_submit_frame(struct mtk_eth *eth, struct xdp_frame *xdpf,
struct net_device *dev, bool dma_map)
{
struct skb_shared_info *sinfo = xdp_get_shared_info_from_frame(xdpf);
const struct mtk_soc_data *soc = eth->soc;
struct mtk_tx_ring *ring = &eth->tx_ring;
struct mtk_tx_dma_desc_info txd_info = {
.size = xdpf->len,
.first = true,
.last = !xdp_frame_has_frags(xdpf),
};
int err, index = 0, n_desc = 1, nr_frags;
struct mtk_tx_buf *htx_buf, *tx_buf;
struct mtk_tx_dma *htxd, *txd;
void *data = xdpf->data;
if (unlikely(test_bit(MTK_RESETTING, &eth->state)))
return -EBUSY;
nr_frags = unlikely(xdp_frame_has_frags(xdpf)) ? sinfo->nr_frags : 0;
if (unlikely(atomic_read(&ring->free_count) <= 1 + nr_frags))
return -EBUSY;
spin_lock(&eth->page_lock);
txd = ring->next_free;
if (txd == ring->last_free) {
spin_unlock(&eth->page_lock);
return -ENOMEM;
}
htxd = txd;
tx_buf = mtk_desc_to_tx_buf(ring, txd, soc->txrx.txd_size);
memset(tx_buf, 0, sizeof(*tx_buf));
htx_buf = tx_buf;
for (;;) {
err = mtk_xdp_frame_map(eth, dev, &txd_info, txd, tx_buf,
data, xdpf->headroom, index, dma_map);
if (err < 0)
goto unmap;
if (txd_info.last)
break;
if (MTK_HAS_CAPS(soc->caps, MTK_QDMA) || (index & 0x1)) {
txd = mtk_qdma_phys_to_virt(ring, txd->txd2);
if (txd == ring->last_free)
goto unmap;
tx_buf = mtk_desc_to_tx_buf(ring, txd,
soc->txrx.txd_size);
memset(tx_buf, 0, sizeof(*tx_buf));
n_desc++;
}
memset(&txd_info, 0, sizeof(struct mtk_tx_dma_desc_info));
txd_info.size = skb_frag_size(&sinfo->frags[index]);
txd_info.last = index + 1 == nr_frags;
data = skb_frag_address(&sinfo->frags[index]);
index++;
}
/* store xdpf for cleanup */
htx_buf->data = xdpf;
if (!MTK_HAS_CAPS(soc->caps, MTK_QDMA)) {
struct mtk_tx_dma *txd_pdma = qdma_to_pdma(ring, txd);
if (index & 1)
txd_pdma->txd2 |= TX_DMA_LS0;
else
txd_pdma->txd2 |= TX_DMA_LS1;
}
ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2);
atomic_sub(n_desc, &ring->free_count);
/* make sure that all changes to the dma ring are flushed before we
* continue
*/
wmb();
if (MTK_HAS_CAPS(soc->caps, MTK_QDMA)) {
mtk_w32(eth, txd->txd2, soc->reg_map->qdma.ctx_ptr);
} else {
int idx;
idx = txd_to_idx(ring, txd, soc->txrx.txd_size);
mtk_w32(eth, NEXT_DESP_IDX(idx, ring->dma_size),
MT7628_TX_CTX_IDX0);
}
spin_unlock(&eth->page_lock);
return 0;
unmap:
while (htxd != txd) {
tx_buf = mtk_desc_to_tx_buf(ring, htxd, soc->txrx.txd_size);
mtk_tx_unmap(eth, tx_buf, NULL, false);
htxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU;
if (!MTK_HAS_CAPS(soc->caps, MTK_QDMA)) {
struct mtk_tx_dma *txd_pdma = qdma_to_pdma(ring, htxd);
txd_pdma->txd2 = TX_DMA_DESP2_DEF;
}
htxd = mtk_qdma_phys_to_virt(ring, htxd->txd2);
}
spin_unlock(&eth->page_lock);
return err;
}
static int mtk_xdp_xmit(struct net_device *dev, int num_frame,
struct xdp_frame **frames, u32 flags)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_hw_stats *hw_stats = mac->hw_stats;
struct mtk_eth *eth = mac->hw;
int i, nxmit = 0;
if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
return -EINVAL;
for (i = 0; i < num_frame; i++) {
if (mtk_xdp_submit_frame(eth, frames[i], dev, true))
break;
nxmit++;
}
u64_stats_update_begin(&hw_stats->syncp);
hw_stats->xdp_stats.tx_xdp_xmit += nxmit;
hw_stats->xdp_stats.tx_xdp_xmit_errors += num_frame - nxmit;
u64_stats_update_end(&hw_stats->syncp);
return nxmit;
}
static u32 mtk_xdp_run(struct mtk_eth *eth, struct mtk_rx_ring *ring,
struct xdp_buff *xdp, struct net_device *dev)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_hw_stats *hw_stats = mac->hw_stats;
u64 *count = &hw_stats->xdp_stats.rx_xdp_drop;
struct bpf_prog *prog;
u32 act = XDP_PASS;
rcu_read_lock();
prog = rcu_dereference(eth->prog);
if (!prog)
goto out;
act = bpf_prog_run_xdp(prog, xdp);
switch (act) {
case XDP_PASS:
count = &hw_stats->xdp_stats.rx_xdp_pass;
goto update_stats;
case XDP_REDIRECT:
if (unlikely(xdp_do_redirect(dev, xdp, prog))) {
act = XDP_DROP;
break;
}
count = &hw_stats->xdp_stats.rx_xdp_redirect;
goto update_stats;
case XDP_TX: {
struct xdp_frame *xdpf = xdp_convert_buff_to_frame(xdp);
if (!xdpf || mtk_xdp_submit_frame(eth, xdpf, dev, false)) {
count = &hw_stats->xdp_stats.rx_xdp_tx_errors;
act = XDP_DROP;
break;
}
count = &hw_stats->xdp_stats.rx_xdp_tx;
goto update_stats;
}
default:
bpf_warn_invalid_xdp_action(dev, prog, act);
fallthrough;
case XDP_ABORTED:
trace_xdp_exception(dev, prog, act);
fallthrough;
case XDP_DROP:
break;
}
page_pool_put_full_page(ring->page_pool,
virt_to_head_page(xdp->data), true);
update_stats:
u64_stats_update_begin(&hw_stats->syncp);
*count = *count + 1;
u64_stats_update_end(&hw_stats->syncp);
out:
rcu_read_unlock();
return act;
}
static int mtk_poll_rx(struct napi_struct *napi, int budget,
struct mtk_eth *eth)
{
struct dim_sample dim_sample = {};
struct mtk_rx_ring *ring;
bool xdp_flush = false;
int idx;
struct sk_buff *skb;
u8 *data, *new_data;
struct mtk_rx_dma_v2 *rxd, trxd;
int done = 0, bytes = 0;
while (done < budget) {
unsigned int pktlen, *rxdcsum;
struct net_device *netdev;
dma_addr_t dma_addr;
u32 hash, reason;
int mac = 0;
ring = mtk_get_rx_ring(eth);
if (unlikely(!ring))
goto rx_done;
idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size);
rxd = ring->dma + idx * eth->soc->txrx.rxd_size;
data = ring->data[idx];
if (!mtk_rx_get_desc(eth, &trxd, rxd))
break;
/* find out which mac the packet come from. values start at 1 */
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2))
mac = RX_DMA_GET_SPORT_V2(trxd.rxd5) - 1;
else if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628) &&
!(trxd.rxd4 & RX_DMA_SPECIAL_TAG))
mac = RX_DMA_GET_SPORT(trxd.rxd4) - 1;
if (unlikely(mac < 0 || mac >= MTK_MAC_COUNT ||
!eth->netdev[mac]))
goto release_desc;
netdev = eth->netdev[mac];
if (unlikely(test_bit(MTK_RESETTING, &eth->state)))
goto release_desc;
pktlen = RX_DMA_GET_PLEN0(trxd.rxd2);
/* alloc new buffer */
if (ring->page_pool) {
struct page *page = virt_to_head_page(data);
struct xdp_buff xdp;
u32 ret;
new_data = mtk_page_pool_get_buff(ring->page_pool,
&dma_addr,
GFP_ATOMIC);
if (unlikely(!new_data)) {
netdev->stats.rx_dropped++;
goto release_desc;
}
dma_sync_single_for_cpu(eth->dma_dev,
page_pool_get_dma_addr(page) + MTK_PP_HEADROOM,
pktlen, page_pool_get_dma_dir(ring->page_pool));
xdp_init_buff(&xdp, PAGE_SIZE, &ring->xdp_q);
xdp_prepare_buff(&xdp, data, MTK_PP_HEADROOM, pktlen,
false);
xdp_buff_clear_frags_flag(&xdp);
ret = mtk_xdp_run(eth, ring, &xdp, netdev);
if (ret == XDP_REDIRECT)
xdp_flush = true;
if (ret != XDP_PASS)
goto skip_rx;
skb = build_skb(data, PAGE_SIZE);
if (unlikely(!skb)) {
page_pool_put_full_page(ring->page_pool,
page, true);
netdev->stats.rx_dropped++;
goto skip_rx;
}
skb_reserve(skb, xdp.data - xdp.data_hard_start);
skb_put(skb, xdp.data_end - xdp.data);
skb_mark_for_recycle(skb);
} else {
if (ring->frag_size <= PAGE_SIZE)
new_data = napi_alloc_frag(ring->frag_size);
else
new_data = mtk_max_lro_buf_alloc(GFP_ATOMIC);
if (unlikely(!new_data)) {
netdev->stats.rx_dropped++;
goto release_desc;
}
dma_addr = dma_map_single(eth->dma_dev,
new_data + NET_SKB_PAD + eth->ip_align,
ring->buf_size, DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(eth->dma_dev,
dma_addr))) {
skb_free_frag(new_data);
netdev->stats.rx_dropped++;
goto release_desc;
}
dma_unmap_single(eth->dma_dev, trxd.rxd1,
ring->buf_size, DMA_FROM_DEVICE);
skb = build_skb(data, ring->frag_size);
if (unlikely(!skb)) {
netdev->stats.rx_dropped++;
skb_free_frag(data);
goto skip_rx;
}
skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
skb_put(skb, pktlen);
}
skb->dev = netdev;
bytes += skb->len;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
reason = FIELD_GET(MTK_RXD5_PPE_CPU_REASON, trxd.rxd5);
hash = trxd.rxd5 & MTK_RXD5_FOE_ENTRY;
if (hash != MTK_RXD5_FOE_ENTRY)
skb_set_hash(skb, jhash_1word(hash, 0),
PKT_HASH_TYPE_L4);
rxdcsum = &trxd.rxd3;
} else {
reason = FIELD_GET(MTK_RXD4_PPE_CPU_REASON, trxd.rxd4);
hash = trxd.rxd4 & MTK_RXD4_FOE_ENTRY;
if (hash != MTK_RXD4_FOE_ENTRY)
skb_set_hash(skb, jhash_1word(hash, 0),
PKT_HASH_TYPE_L4);
rxdcsum = &trxd.rxd4;
}
if (*rxdcsum & eth->soc->txrx.rx_dma_l4_valid)
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb_checksum_none_assert(skb);
skb->protocol = eth_type_trans(skb, netdev);
if (reason == MTK_PPE_CPU_REASON_HIT_UNBIND_RATE_REACHED)
mtk_ppe_check_skb(eth->ppe[0], skb, hash);
if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
if (trxd.rxd3 & RX_DMA_VTAG_V2)
__vlan_hwaccel_put_tag(skb,
htons(RX_DMA_VPID(trxd.rxd4)),
RX_DMA_VID(trxd.rxd4));
} else if (trxd.rxd2 & RX_DMA_VTAG) {
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
RX_DMA_VID(trxd.rxd3));
}
/* If the device is attached to a dsa switch, the special
* tag inserted in VLAN field by hw switch can * be offloaded
* by RX HW VLAN offload. Clear vlan info.
*/
if (netdev_uses_dsa(netdev))
__vlan_hwaccel_clear_tag(skb);
}
skb_record_rx_queue(skb, 0);
napi_gro_receive(napi, skb);
skip_rx:
ring->data[idx] = new_data;
rxd->rxd1 = (unsigned int)dma_addr;
release_desc:
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
rxd->rxd2 = RX_DMA_LSO;
else
rxd->rxd2 = RX_DMA_PREP_PLEN0(ring->buf_size);
ring->calc_idx = idx;
done++;
}
rx_done:
if (done) {
/* make sure that all changes to the dma ring are flushed before
* we continue
*/
wmb();
mtk_update_rx_cpu_idx(eth);
}
eth->rx_packets += done;
eth->rx_bytes += bytes;
dim_update_sample(eth->rx_events, eth->rx_packets, eth->rx_bytes,
&dim_sample);
net_dim(&eth->rx_dim, dim_sample);
if (xdp_flush)
xdp_do_flush_map();
return done;
}
static int mtk_poll_tx_qdma(struct mtk_eth *eth, int budget,
unsigned int *done, unsigned int *bytes)
{
const struct mtk_reg_map *reg_map = eth->soc->reg_map;
struct mtk_tx_ring *ring = &eth->tx_ring;
struct mtk_tx_buf *tx_buf;
struct xdp_frame_bulk bq;
struct mtk_tx_dma *desc;
u32 cpu, dma;
cpu = ring->last_free_ptr;
dma = mtk_r32(eth, reg_map->qdma.drx_ptr);
desc = mtk_qdma_phys_to_virt(ring, cpu);
xdp_frame_bulk_init(&bq);
while ((cpu != dma) && budget) {
u32 next_cpu = desc->txd2;
int mac = 0;
desc = mtk_qdma_phys_to_virt(ring, desc->txd2);
if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0)
break;
tx_buf = mtk_desc_to_tx_buf(ring, desc,
eth->soc->txrx.txd_size);
if (tx_buf->flags & MTK_TX_FLAGS_FPORT1)
mac = 1;
if (!tx_buf->data)
break;
if (tx_buf->data != (void *)MTK_DMA_DUMMY_DESC) {
if (tx_buf->type == MTK_TYPE_SKB) {
struct sk_buff *skb = tx_buf->data;
bytes[mac] += skb->len;
done[mac]++;
}
budget--;
}
mtk_tx_unmap(eth, tx_buf, &bq, true);
ring->last_free = desc;
atomic_inc(&ring->free_count);
cpu = next_cpu;
}
xdp_flush_frame_bulk(&bq);
ring->last_free_ptr = cpu;
mtk_w32(eth, cpu, reg_map->qdma.crx_ptr);
return budget;
}
static int mtk_poll_tx_pdma(struct mtk_eth *eth, int budget,
unsigned int *done, unsigned int *bytes)
{
struct mtk_tx_ring *ring = &eth->tx_ring;
struct mtk_tx_buf *tx_buf;
struct xdp_frame_bulk bq;
struct mtk_tx_dma *desc;
u32 cpu, dma;
cpu = ring->cpu_idx;
dma = mtk_r32(eth, MT7628_TX_DTX_IDX0);
xdp_frame_bulk_init(&bq);
while ((cpu != dma) && budget) {
tx_buf = &ring->buf[cpu];
if (!tx_buf->data)
break;
if (tx_buf->data != (void *)MTK_DMA_DUMMY_DESC) {
if (tx_buf->type == MTK_TYPE_SKB) {
struct sk_buff *skb = tx_buf->data;
bytes[0] += skb->len;
done[0]++;
}
budget--;
}
mtk_tx_unmap(eth, tx_buf, &bq, true);
desc = ring->dma + cpu * eth->soc->txrx.txd_size;
ring->last_free = desc;
atomic_inc(&ring->free_count);
cpu = NEXT_DESP_IDX(cpu, ring->dma_size);
}
xdp_flush_frame_bulk(&bq);
ring->cpu_idx = cpu;
return budget;
}
static int mtk_poll_tx(struct mtk_eth *eth, int budget)
{
struct mtk_tx_ring *ring = &eth->tx_ring;
struct dim_sample dim_sample = {};
unsigned int done[MTK_MAX_DEVS];
unsigned int bytes[MTK_MAX_DEVS];
int total = 0, i;
memset(done, 0, sizeof(done));
memset(bytes, 0, sizeof(bytes));
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA))
budget = mtk_poll_tx_qdma(eth, budget, done, bytes);
else
budget = mtk_poll_tx_pdma(eth, budget, done, bytes);
for (i = 0; i < MTK_MAC_COUNT; i++) {
if (!eth->netdev[i] || !done[i])
continue;
netdev_completed_queue(eth->netdev[i], done[i], bytes[i]);
total += done[i];
eth->tx_packets += done[i];
eth->tx_bytes += bytes[i];
}
dim_update_sample(eth->tx_events, eth->tx_packets, eth->tx_bytes,
&dim_sample);
net_dim(&eth->tx_dim, dim_sample);
if (mtk_queue_stopped(eth) &&
(atomic_read(&ring->free_count) > ring->thresh))
mtk_wake_queue(eth);
return total;
}
static void mtk_handle_status_irq(struct mtk_eth *eth)
{
u32 status2 = mtk_r32(eth, MTK_INT_STATUS2);
if (unlikely(status2 & (MTK_GDM1_AF | MTK_GDM2_AF))) {
mtk_stats_update(eth);
mtk_w32(eth, (MTK_GDM1_AF | MTK_GDM2_AF),
MTK_INT_STATUS2);
}
}
static int mtk_napi_tx(struct napi_struct *napi, int budget)
{
struct mtk_eth *eth = container_of(napi, struct mtk_eth, tx_napi);
const struct mtk_reg_map *reg_map = eth->soc->reg_map;
int tx_done = 0;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA))
mtk_handle_status_irq(eth);
mtk_w32(eth, MTK_TX_DONE_INT, reg_map->tx_irq_status);
tx_done = mtk_poll_tx(eth, budget);
if (unlikely(netif_msg_intr(eth))) {
dev_info(eth->dev,
"done tx %d, intr 0x%08x/0x%x\n", tx_done,
mtk_r32(eth, reg_map->tx_irq_status),
mtk_r32(eth, reg_map->tx_irq_mask));
}
if (tx_done == budget)
return budget;
if (mtk_r32(eth, reg_map->tx_irq_status) & MTK_TX_DONE_INT)
return budget;
if (napi_complete_done(napi, tx_done))
mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);
return tx_done;
}
static int mtk_napi_rx(struct napi_struct *napi, int budget)
{
struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi);
const struct mtk_reg_map *reg_map = eth->soc->reg_map;
int rx_done_total = 0;
mtk_handle_status_irq(eth);
do {
int rx_done;
mtk_w32(eth, eth->soc->txrx.rx_irq_done_mask,
reg_map->pdma.irq_status);
rx_done = mtk_poll_rx(napi, budget - rx_done_total, eth);
rx_done_total += rx_done;
if (unlikely(netif_msg_intr(eth))) {
dev_info(eth->dev,
"done rx %d, intr 0x%08x/0x%x\n", rx_done,
mtk_r32(eth, reg_map->pdma.irq_status),
mtk_r32(eth, reg_map->pdma.irq_mask));
}
if (rx_done_total == budget)
return budget;
} while (mtk_r32(eth, reg_map->pdma.irq_status) &
eth->soc->txrx.rx_irq_done_mask);
if (napi_complete_done(napi, rx_done_total))
mtk_rx_irq_enable(eth, eth->soc->txrx.rx_irq_done_mask);
return rx_done_total;
}
static int mtk_tx_alloc(struct mtk_eth *eth)
{
const struct mtk_soc_data *soc = eth->soc;
struct mtk_tx_ring *ring = &eth->tx_ring;
int i, sz = soc->txrx.txd_size;
struct mtk_tx_dma_v2 *txd;
ring->buf = kcalloc(MTK_DMA_SIZE, sizeof(*ring->buf),
GFP_KERNEL);
if (!ring->buf)
goto no_tx_mem;
ring->dma = dma_alloc_coherent(eth->dma_dev, MTK_DMA_SIZE * sz,
&ring->phys, GFP_KERNEL);
if (!ring->dma)
goto no_tx_mem;
for (i = 0; i < MTK_DMA_SIZE; i++) {
int next = (i + 1) % MTK_DMA_SIZE;
u32 next_ptr = ring->phys + next * sz;
txd = ring->dma + i * sz;
txd->txd2 = next_ptr;
txd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU;
txd->txd4 = 0;
if (MTK_HAS_CAPS(soc->caps, MTK_NETSYS_V2)) {
txd->txd5 = 0;
txd->txd6 = 0;
txd->txd7 = 0;
txd->txd8 = 0;
}
}
/* On MT7688 (PDMA only) this driver uses the ring->dma structs
* only as the framework. The real HW descriptors are the PDMA
* descriptors in ring->dma_pdma.
*/
if (!MTK_HAS_CAPS(soc->caps, MTK_QDMA)) {
ring->dma_pdma = dma_alloc_coherent(eth->dma_dev, MTK_DMA_SIZE * sz,
&ring->phys_pdma, GFP_KERNEL);
if (!ring->dma_pdma)
goto no_tx_mem;
for (i = 0; i < MTK_DMA_SIZE; i++) {
ring->dma_pdma[i].txd2 = TX_DMA_DESP2_DEF;
ring->dma_pdma[i].txd4 = 0;
}
}
ring->dma_size = MTK_DMA_SIZE;
atomic_set(&ring->free_count, MTK_DMA_SIZE - 2);
ring->next_free = ring->dma;
ring->last_free = (void *)txd;
ring->last_free_ptr = (u32)(ring->phys + ((MTK_DMA_SIZE - 1) * sz));
ring->thresh = MAX_SKB_FRAGS;
/* make sure that all changes to the dma ring are flushed before we
* continue
*/
wmb();
if (MTK_HAS_CAPS(soc->caps, MTK_QDMA)) {
mtk_w32(eth, ring->phys, soc->reg_map->qdma.ctx_ptr);
mtk_w32(eth, ring->phys, soc->reg_map->qdma.dtx_ptr);
mtk_w32(eth,
ring->phys + ((MTK_DMA_SIZE - 1) * sz),
soc->reg_map->qdma.crx_ptr);
mtk_w32(eth, ring->last_free_ptr, soc->reg_map->qdma.drx_ptr);
mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES,
soc->reg_map->qdma.qtx_cfg);
} else {
mtk_w32(eth, ring->phys_pdma, MT7628_TX_BASE_PTR0);
mtk_w32(eth, MTK_DMA_SIZE, MT7628_TX_MAX_CNT0);
mtk_w32(eth, 0, MT7628_TX_CTX_IDX0);
mtk_w32(eth, MT7628_PST_DTX_IDX0, soc->reg_map->pdma.rst_idx);
}
return 0;
no_tx_mem:
return -ENOMEM;
}
static void mtk_tx_clean(struct mtk_eth *eth)
{
const struct mtk_soc_data *soc = eth->soc;
struct mtk_tx_ring *ring = &eth->tx_ring;
int i;
if (ring->buf) {
for (i = 0; i < MTK_DMA_SIZE; i++)
mtk_tx_unmap(eth, &ring->buf[i], NULL, false);
kfree(ring->buf);
ring->buf = NULL;
}
if (ring->dma) {
dma_free_coherent(eth->dma_dev,
MTK_DMA_SIZE * soc->txrx.txd_size,
ring->dma, ring->phys);
ring->dma = NULL;
}
if (ring->dma_pdma) {
dma_free_coherent(eth->dma_dev,
MTK_DMA_SIZE * soc->txrx.txd_size,
ring->dma_pdma, ring->phys_pdma);
ring->dma_pdma = NULL;
}
}
static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag)
{
const struct mtk_reg_map *reg_map = eth->soc->reg_map;
struct mtk_rx_ring *ring;
int rx_data_len, rx_dma_size;
int i;
if (rx_flag == MTK_RX_FLAGS_QDMA) {
if (ring_no)
return -EINVAL;
ring = &eth->rx_ring_qdma;
} else {
ring = &eth->rx_ring[ring_no];
}
if (rx_flag == MTK_RX_FLAGS_HWLRO) {
rx_data_len = MTK_MAX_LRO_RX_LENGTH;
rx_dma_size = MTK_HW_LRO_DMA_SIZE;
} else {
rx_data_len = ETH_DATA_LEN;
rx_dma_size = MTK_DMA_SIZE;
}
ring->frag_size = mtk_max_frag_size(rx_data_len);
ring->buf_size = mtk_max_buf_size(ring->frag_size);
ring->data = kcalloc(rx_dma_size, sizeof(*ring->data),
GFP_KERNEL);
if (!ring->data)
return -ENOMEM;
if (mtk_page_pool_enabled(eth)) {
struct page_pool *pp;
pp = mtk_create_page_pool(eth, &ring->xdp_q, ring_no,
rx_dma_size);
if (IS_ERR(pp))
return PTR_ERR(pp);
ring->page_pool = pp;
}
ring->dma = dma_alloc_coherent(eth->dma_dev,
rx_dma_size * eth->soc->txrx.rxd_size,
&ring->phys, GFP_KERNEL);
if (!ring->dma)
return -ENOMEM;
for (i = 0; i < rx_dma_size; i++) {
struct mtk_rx_dma_v2 *rxd;
dma_addr_t dma_addr;
void *data;
rxd = ring->dma + i * eth->soc->txrx.rxd_size;
if (ring->page_pool) {
data = mtk_page_pool_get_buff(ring->page_pool,
&dma_addr, GFP_KERNEL);
if (!data)
return -ENOMEM;
} else {
if (ring->frag_size <= PAGE_SIZE)
data = netdev_alloc_frag(ring->frag_size);
else
data = mtk_max_lro_buf_alloc(GFP_KERNEL);
if (!data)
return -ENOMEM;
dma_addr = dma_map_single(eth->dma_dev,
data + NET_SKB_PAD + eth->ip_align,
ring->buf_size, DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(eth->dma_dev,
dma_addr))) {
skb_free_frag(data);
return -ENOMEM;
}
}
rxd->rxd1 = (unsigned int)dma_addr;
ring->data[i] = data;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
rxd->rxd2 = RX_DMA_LSO;
else
rxd->rxd2 = RX_DMA_PREP_PLEN0(ring->buf_size);
rxd->rxd3 = 0;
rxd->rxd4 = 0;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
rxd->rxd5 = 0;
rxd->rxd6 = 0;
rxd->rxd7 = 0;
rxd->rxd8 = 0;
}
}
ring->dma_size = rx_dma_size;
ring->calc_idx_update = false;
ring->calc_idx = rx_dma_size - 1;
if (rx_flag == MTK_RX_FLAGS_QDMA)
ring->crx_idx_reg = reg_map->qdma.qcrx_ptr +
ring_no * MTK_QRX_OFFSET;
else
ring->crx_idx_reg = reg_map->pdma.pcrx_ptr +
ring_no * MTK_QRX_OFFSET;
/* make sure that all changes to the dma ring are flushed before we
* continue
*/
wmb();
if (rx_flag == MTK_RX_FLAGS_QDMA) {
mtk_w32(eth, ring->phys,
reg_map->qdma.rx_ptr + ring_no * MTK_QRX_OFFSET);
mtk_w32(eth, rx_dma_size,
reg_map->qdma.rx_cnt_cfg + ring_no * MTK_QRX_OFFSET);
mtk_w32(eth, MTK_PST_DRX_IDX_CFG(ring_no),
reg_map->qdma.rst_idx);
} else {
mtk_w32(eth, ring->phys,
reg_map->pdma.rx_ptr + ring_no * MTK_QRX_OFFSET);
mtk_w32(eth, rx_dma_size,
reg_map->pdma.rx_cnt_cfg + ring_no * MTK_QRX_OFFSET);
mtk_w32(eth, MTK_PST_DRX_IDX_CFG(ring_no),
reg_map->pdma.rst_idx);
}
mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg);
return 0;
}
static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring)
{
int i;
if (ring->data && ring->dma) {
for (i = 0; i < ring->dma_size; i++) {
struct mtk_rx_dma *rxd;
if (!ring->data[i])
continue;
rxd = ring->dma + i * eth->soc->txrx.rxd_size;
if (!rxd->rxd1)
continue;
dma_unmap_single(eth->dma_dev, rxd->rxd1,
ring->buf_size, DMA_FROM_DEVICE);
mtk_rx_put_buff(ring, ring->data[i], false);
}
kfree(ring->data);
ring->data = NULL;
}
if (ring->dma) {
dma_free_coherent(eth->dma_dev,
ring->dma_size * eth->soc->txrx.rxd_size,
ring->dma, ring->phys);
ring->dma = NULL;
}
if (ring->page_pool) {
if (xdp_rxq_info_is_reg(&ring->xdp_q))
xdp_rxq_info_unreg(&ring->xdp_q);
page_pool_destroy(ring->page_pool);
ring->page_pool = NULL;
}
}
static int mtk_hwlro_rx_init(struct mtk_eth *eth)
{
int i;
u32 ring_ctrl_dw1 = 0, ring_ctrl_dw2 = 0, ring_ctrl_dw3 = 0;
u32 lro_ctrl_dw0 = 0, lro_ctrl_dw3 = 0;
/* set LRO rings to auto-learn modes */
ring_ctrl_dw2 |= MTK_RING_AUTO_LERAN_MODE;
/* validate LRO ring */
ring_ctrl_dw2 |= MTK_RING_VLD;
/* set AGE timer (unit: 20us) */
ring_ctrl_dw2 |= MTK_RING_AGE_TIME_H;
ring_ctrl_dw1 |= MTK_RING_AGE_TIME_L;
/* set max AGG timer (unit: 20us) */
ring_ctrl_dw2 |= MTK_RING_MAX_AGG_TIME;
/* set max LRO AGG count */
ring_ctrl_dw2 |= MTK_RING_MAX_AGG_CNT_L;
ring_ctrl_dw3 |= MTK_RING_MAX_AGG_CNT_H;
for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) {
mtk_w32(eth, ring_ctrl_dw1, MTK_LRO_CTRL_DW1_CFG(i));
mtk_w32(eth, ring_ctrl_dw2, MTK_LRO_CTRL_DW2_CFG(i));
mtk_w32(eth, ring_ctrl_dw3, MTK_LRO_CTRL_DW3_CFG(i));
}
/* IPv4 checksum update enable */
lro_ctrl_dw0 |= MTK_L3_CKS_UPD_EN;
/* switch priority comparison to packet count mode */
lro_ctrl_dw0 |= MTK_LRO_ALT_PKT_CNT_MODE;
/* bandwidth threshold setting */
mtk_w32(eth, MTK_HW_LRO_BW_THRE, MTK_PDMA_LRO_CTRL_DW2);
/* auto-learn score delta setting */
mtk_w32(eth, MTK_HW_LRO_REPLACE_DELTA, MTK_PDMA_LRO_ALT_SCORE_DELTA);
/* set refresh timer for altering flows to 1 sec. (unit: 20us) */
mtk_w32(eth, (MTK_HW_LRO_TIMER_UNIT << 16) | MTK_HW_LRO_REFRESH_TIME,
MTK_PDMA_LRO_ALT_REFRESH_TIMER);
/* set HW LRO mode & the max aggregation count for rx packets */
lro_ctrl_dw3 |= MTK_ADMA_MODE | (MTK_HW_LRO_MAX_AGG_CNT & 0xff);
/* the minimal remaining room of SDL0 in RXD for lro aggregation */
lro_ctrl_dw3 |= MTK_LRO_MIN_RXD_SDL;
/* enable HW LRO */
lro_ctrl_dw0 |= MTK_LRO_EN;
mtk_w32(eth, lro_ctrl_dw3, MTK_PDMA_LRO_CTRL_DW3);
mtk_w32(eth, lro_ctrl_dw0, MTK_PDMA_LRO_CTRL_DW0);
return 0;
}
static void mtk_hwlro_rx_uninit(struct mtk_eth *eth)
{
int i;
u32 val;
/* relinquish lro rings, flush aggregated packets */
mtk_w32(eth, MTK_LRO_RING_RELINQUISH_REQ, MTK_PDMA_LRO_CTRL_DW0);
/* wait for relinquishments done */
for (i = 0; i < 10; i++) {
val = mtk_r32(eth, MTK_PDMA_LRO_CTRL_DW0);
if (val & MTK_LRO_RING_RELINQUISH_DONE) {
msleep(20);
continue;
}
break;
}
/* invalidate lro rings */
for (i = 1; i < MTK_MAX_RX_RING_NUM; i++)
mtk_w32(eth, 0, MTK_LRO_CTRL_DW2_CFG(i));
/* disable HW LRO */
mtk_w32(eth, 0, MTK_PDMA_LRO_CTRL_DW0);
}
static void mtk_hwlro_val_ipaddr(struct mtk_eth *eth, int idx, __be32 ip)
{
u32 reg_val;
reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx));
/* invalidate the IP setting */
mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx));
mtk_w32(eth, ip, MTK_LRO_DIP_DW0_CFG(idx));
/* validate the IP setting */
mtk_w32(eth, (reg_val | MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx));
}
static void mtk_hwlro_inval_ipaddr(struct mtk_eth *eth, int idx)
{
u32 reg_val;
reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx));
/* invalidate the IP setting */
mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx));
mtk_w32(eth, 0, MTK_LRO_DIP_DW0_CFG(idx));
}
static int mtk_hwlro_get_ip_cnt(struct mtk_mac *mac)
{
int cnt = 0;
int i;
for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) {
if (mac->hwlro_ip[i])
cnt++;
}
return cnt;
}
static int mtk_hwlro_add_ipaddr(struct net_device *dev,
struct ethtool_rxnfc *cmd)
{
struct ethtool_rx_flow_spec *fsp =
(struct ethtool_rx_flow_spec *)&cmd->fs;
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
int hwlro_idx;
if ((fsp->flow_type != TCP_V4_FLOW) ||
(!fsp->h_u.tcp_ip4_spec.ip4dst) ||
(fsp->location > 1))
return -EINVAL;
mac->hwlro_ip[fsp->location] = htonl(fsp->h_u.tcp_ip4_spec.ip4dst);
hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location;
mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac);
mtk_hwlro_val_ipaddr(eth, hwlro_idx, mac->hwlro_ip[fsp->location]);
return 0;
}
static int mtk_hwlro_del_ipaddr(struct net_device *dev,
struct ethtool_rxnfc *cmd)
{
struct ethtool_rx_flow_spec *fsp =
(struct ethtool_rx_flow_spec *)&cmd->fs;
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
int hwlro_idx;
if (fsp->location > 1)
return -EINVAL;
mac->hwlro_ip[fsp->location] = 0;
hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location;
mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac);
mtk_hwlro_inval_ipaddr(eth, hwlro_idx);
return 0;
}
static void mtk_hwlro_netdev_disable(struct net_device *dev)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
int i, hwlro_idx;
for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) {
mac->hwlro_ip[i] = 0;
hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + i;
mtk_hwlro_inval_ipaddr(eth, hwlro_idx);
}
mac->hwlro_ip_cnt = 0;
}
static int mtk_hwlro_get_fdir_entry(struct net_device *dev,
struct ethtool_rxnfc *cmd)
{
struct mtk_mac *mac = netdev_priv(dev);
struct ethtool_rx_flow_spec *fsp =
(struct ethtool_rx_flow_spec *)&cmd->fs;
if (fsp->location >= ARRAY_SIZE(mac->hwlro_ip))
return -EINVAL;
/* only tcp dst ipv4 is meaningful, others are meaningless */
fsp->flow_type = TCP_V4_FLOW;
fsp->h_u.tcp_ip4_spec.ip4dst = ntohl(mac->hwlro_ip[fsp->location]);
fsp->m_u.tcp_ip4_spec.ip4dst = 0;
fsp->h_u.tcp_ip4_spec.ip4src = 0;
fsp->m_u.tcp_ip4_spec.ip4src = 0xffffffff;
fsp->h_u.tcp_ip4_spec.psrc = 0;
fsp->m_u.tcp_ip4_spec.psrc = 0xffff;
fsp->h_u.tcp_ip4_spec.pdst = 0;
fsp->m_u.tcp_ip4_spec.pdst = 0xffff;
fsp->h_u.tcp_ip4_spec.tos = 0;
fsp->m_u.tcp_ip4_spec.tos = 0xff;
return 0;
}
static int mtk_hwlro_get_fdir_all(struct net_device *dev,
struct ethtool_rxnfc *cmd,
u32 *rule_locs)
{
struct mtk_mac *mac = netdev_priv(dev);
int cnt = 0;
int i;
for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) {
if (mac->hwlro_ip[i]) {
rule_locs[cnt] = i;
cnt++;
}
}
cmd->rule_cnt = cnt;
return 0;
}
static netdev_features_t mtk_fix_features(struct net_device *dev,
netdev_features_t features)
{
if (!(features & NETIF_F_LRO)) {
struct mtk_mac *mac = netdev_priv(dev);
int ip_cnt = mtk_hwlro_get_ip_cnt(mac);
if (ip_cnt) {
netdev_info(dev, "RX flow is programmed, LRO should keep on\n");
features |= NETIF_F_LRO;
}
}
return features;
}
static int mtk_set_features(struct net_device *dev, netdev_features_t features)
{
int err = 0;
if (!((dev->features ^ features) & NETIF_F_LRO))
return 0;
if (!(features & NETIF_F_LRO))
mtk_hwlro_netdev_disable(dev);
return err;
}
/* wait for DMA to finish whatever it is doing before we start using it again */
static int mtk_dma_busy_wait(struct mtk_eth *eth)
{
unsigned int reg;
int ret;
u32 val;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA))
reg = eth->soc->reg_map->qdma.glo_cfg;
else
reg = eth->soc->reg_map->pdma.glo_cfg;
ret = readx_poll_timeout_atomic(__raw_readl, eth->base + reg, val,
!(val & (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY)),
5, MTK_DMA_BUSY_TIMEOUT_US);
if (ret)
dev_err(eth->dev, "DMA init timeout\n");
return ret;
}
static int mtk_dma_init(struct mtk_eth *eth)
{
int err;
u32 i;
if (mtk_dma_busy_wait(eth))
return -EBUSY;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
/* QDMA needs scratch memory for internal reordering of the
* descriptors
*/
err = mtk_init_fq_dma(eth);
if (err)
return err;
}
err = mtk_tx_alloc(eth);
if (err)
return err;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_QDMA);
if (err)
return err;
}
err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_NORMAL);
if (err)
return err;
if (eth->hwlro) {
for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) {
err = mtk_rx_alloc(eth, i, MTK_RX_FLAGS_HWLRO);
if (err)
return err;
}
err = mtk_hwlro_rx_init(eth);
if (err)
return err;
}
if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
/* Enable random early drop and set drop threshold
* automatically
*/
mtk_w32(eth, FC_THRES_DROP_MODE | FC_THRES_DROP_EN |
FC_THRES_MIN, eth->soc->reg_map->qdma.fc_th);
mtk_w32(eth, 0x0, eth->soc->reg_map->qdma.hred);
}
return 0;
}
static void mtk_dma_free(struct mtk_eth *eth)
{
const struct mtk_soc_data *soc = eth->soc;
int i;
for (i = 0; i < MTK_MAC_COUNT; i++)
if (eth->netdev[i])
netdev_reset_queue(eth->netdev[i]);
if (eth->scratch_ring) {
dma_free_coherent(eth->dma_dev,
MTK_DMA_SIZE * soc->txrx.txd_size,
eth->scratch_ring, eth->phy_scratch_ring);
eth->scratch_ring = NULL;
eth->phy_scratch_ring = 0;
}
mtk_tx_clean(eth);
mtk_rx_clean(eth, &eth->rx_ring[0]);
mtk_rx_clean(eth, &eth->rx_ring_qdma);
if (eth->hwlro) {
mtk_hwlro_rx_uninit(eth);
for (i = 1; i < MTK_MAX_RX_RING_NUM; i++)
mtk_rx_clean(eth, &eth->rx_ring[i]);
}
kfree(eth->scratch_head);
}
static void mtk_tx_timeout(struct net_device *dev, unsigned int txqueue)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
eth->netdev[mac->id]->stats.tx_errors++;
netif_err(eth, tx_err, dev,
"transmit timed out\n");
schedule_work(&eth->pending_work);
}
static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth)
{
struct mtk_eth *eth = _eth;
eth->rx_events++;
if (likely(napi_schedule_prep(&eth->rx_napi))) {
__napi_schedule(&eth->rx_napi);
mtk_rx_irq_disable(eth, eth->soc->txrx.rx_irq_done_mask);
}
return IRQ_HANDLED;
}
static irqreturn_t mtk_handle_irq_tx(int irq, void *_eth)
{
struct mtk_eth *eth = _eth;
eth->tx_events++;
if (likely(napi_schedule_prep(&eth->tx_napi))) {
__napi_schedule(&eth->tx_napi);
mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
}
return IRQ_HANDLED;
}
static irqreturn_t mtk_handle_irq(int irq, void *_eth)
{
struct mtk_eth *eth = _eth;
const struct mtk_reg_map *reg_map = eth->soc->reg_map;
if (mtk_r32(eth, reg_map->pdma.irq_mask) &
eth->soc->txrx.rx_irq_done_mask) {
if (mtk_r32(eth, reg_map->pdma.irq_status) &
eth->soc->txrx.rx_irq_done_mask)
mtk_handle_irq_rx(irq, _eth);
}
if (mtk_r32(eth, reg_map->tx_irq_mask) & MTK_TX_DONE_INT) {
if (mtk_r32(eth, reg_map->tx_irq_status) & MTK_TX_DONE_INT)
mtk_handle_irq_tx(irq, _eth);
}
return IRQ_HANDLED;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void mtk_poll_controller(struct net_device *dev)
{
struct mtk_mac *mac = netdev_priv(dev);
struct mtk_eth *eth = mac->hw;
mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
mtk_rx_irq_disable(eth, eth->soc->txrx.rx_irq_done_mask);
mtk_handle_irq_rx(eth->irq[2], dev);
mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);