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4ffd3c730e
linux/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
françois romieu 4ffd3c730e net: batch of last_rx update avoidance in ethernet drivers. 
None of those drivers uses last_rx for its own needs.

See 4dc89133f4 ("net: add a comment on
netdev->last_rx") for reference.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Wingman Kwok <w-kwok2@ti.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-14 17:38:17 -04:00

1066 lines
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/* Copyright (c) 2014 Linaro Ltd.
* Copyright (c) 2014 Hisilicon Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/etherdevice.h>
#include <linux/platform_device.h>
#include <linux/of_net.h>
#include <linux/of_mdio.h>
#include <linux/clk.h>
#include <linux/circ_buf.h>
#define STATION_ADDR_LOW 0x0000
#define STATION_ADDR_HIGH 0x0004
#define MAC_DUPLEX_HALF_CTRL 0x0008
#define MAX_FRM_SIZE 0x003c
#define PORT_MODE 0x0040
#define PORT_EN 0x0044
#define BITS_TX_EN BIT(2)
#define BITS_RX_EN BIT(1)
#define REC_FILT_CONTROL 0x0064
#define BIT_CRC_ERR_PASS BIT(5)
#define BIT_PAUSE_FRM_PASS BIT(4)
#define BIT_VLAN_DROP_EN BIT(3)
#define BIT_BC_DROP_EN BIT(2)
#define BIT_MC_MATCH_EN BIT(1)
#define BIT_UC_MATCH_EN BIT(0)
#define PORT_MC_ADDR_LOW 0x0068
#define PORT_MC_ADDR_HIGH 0x006C
#define CF_CRC_STRIP 0x01b0
#define MODE_CHANGE_EN 0x01b4
#define BIT_MODE_CHANGE_EN BIT(0)
#define COL_SLOT_TIME 0x01c0
#define RECV_CONTROL 0x01e0
#define BIT_STRIP_PAD_EN BIT(3)
#define BIT_RUNT_PKT_EN BIT(4)
#define CONTROL_WORD 0x0214
#define MDIO_SINGLE_CMD 0x03c0
#define MDIO_SINGLE_DATA 0x03c4
#define MDIO_CTRL 0x03cc
#define MDIO_RDATA_STATUS 0x03d0
#define MDIO_START BIT(20)
#define MDIO_R_VALID BIT(0)
#define MDIO_READ (BIT(17) | MDIO_START)
#define MDIO_WRITE (BIT(16) | MDIO_START)
#define RX_FQ_START_ADDR 0x0500
#define RX_FQ_DEPTH 0x0504
#define RX_FQ_WR_ADDR 0x0508
#define RX_FQ_RD_ADDR 0x050c
#define RX_FQ_VLDDESC_CNT 0x0510
#define RX_FQ_ALEMPTY_TH 0x0514
#define RX_FQ_REG_EN 0x0518
#define BITS_RX_FQ_START_ADDR_EN BIT(2)
#define BITS_RX_FQ_DEPTH_EN BIT(1)
#define BITS_RX_FQ_RD_ADDR_EN BIT(0)
#define RX_FQ_ALFULL_TH 0x051c
#define RX_BQ_START_ADDR 0x0520
#define RX_BQ_DEPTH 0x0524
#define RX_BQ_WR_ADDR 0x0528
#define RX_BQ_RD_ADDR 0x052c
#define RX_BQ_FREE_DESC_CNT 0x0530
#define RX_BQ_ALEMPTY_TH 0x0534
#define RX_BQ_REG_EN 0x0538
#define BITS_RX_BQ_START_ADDR_EN BIT(2)
#define BITS_RX_BQ_DEPTH_EN BIT(1)
#define BITS_RX_BQ_WR_ADDR_EN BIT(0)
#define RX_BQ_ALFULL_TH 0x053c
#define TX_BQ_START_ADDR 0x0580
#define TX_BQ_DEPTH 0x0584
#define TX_BQ_WR_ADDR 0x0588
#define TX_BQ_RD_ADDR 0x058c
#define TX_BQ_VLDDESC_CNT 0x0590
#define TX_BQ_ALEMPTY_TH 0x0594
#define TX_BQ_REG_EN 0x0598
#define BITS_TX_BQ_START_ADDR_EN BIT(2)
#define BITS_TX_BQ_DEPTH_EN BIT(1)
#define BITS_TX_BQ_RD_ADDR_EN BIT(0)
#define TX_BQ_ALFULL_TH 0x059c
#define TX_RQ_START_ADDR 0x05a0
#define TX_RQ_DEPTH 0x05a4
#define TX_RQ_WR_ADDR 0x05a8
#define TX_RQ_RD_ADDR 0x05ac
#define TX_RQ_FREE_DESC_CNT 0x05b0
#define TX_RQ_ALEMPTY_TH 0x05b4
#define TX_RQ_REG_EN 0x05b8
#define BITS_TX_RQ_START_ADDR_EN BIT(2)
#define BITS_TX_RQ_DEPTH_EN BIT(1)
#define BITS_TX_RQ_WR_ADDR_EN BIT(0)
#define TX_RQ_ALFULL_TH 0x05bc
#define RAW_PMU_INT 0x05c0
#define ENA_PMU_INT 0x05c4
#define STATUS_PMU_INT 0x05c8
#define MAC_FIFO_ERR_IN BIT(30)
#define TX_RQ_IN_TIMEOUT_INT BIT(29)
#define RX_BQ_IN_TIMEOUT_INT BIT(28)
#define TXOUTCFF_FULL_INT BIT(27)
#define TXOUTCFF_EMPTY_INT BIT(26)
#define TXCFF_FULL_INT BIT(25)
#define TXCFF_EMPTY_INT BIT(24)
#define RXOUTCFF_FULL_INT BIT(23)
#define RXOUTCFF_EMPTY_INT BIT(22)
#define RXCFF_FULL_INT BIT(21)
#define RXCFF_EMPTY_INT BIT(20)
#define TX_RQ_IN_INT BIT(19)
#define TX_BQ_OUT_INT BIT(18)
#define RX_BQ_IN_INT BIT(17)
#define RX_FQ_OUT_INT BIT(16)
#define TX_RQ_EMPTY_INT BIT(15)
#define TX_RQ_FULL_INT BIT(14)
#define TX_RQ_ALEMPTY_INT BIT(13)
#define TX_RQ_ALFULL_INT BIT(12)
#define TX_BQ_EMPTY_INT BIT(11)
#define TX_BQ_FULL_INT BIT(10)
#define TX_BQ_ALEMPTY_INT BIT(9)
#define TX_BQ_ALFULL_INT BIT(8)
#define RX_BQ_EMPTY_INT BIT(7)
#define RX_BQ_FULL_INT BIT(6)
#define RX_BQ_ALEMPTY_INT BIT(5)
#define RX_BQ_ALFULL_INT BIT(4)
#define RX_FQ_EMPTY_INT BIT(3)
#define RX_FQ_FULL_INT BIT(2)
#define RX_FQ_ALEMPTY_INT BIT(1)
#define RX_FQ_ALFULL_INT BIT(0)
#define DEF_INT_MASK (RX_BQ_IN_INT | RX_BQ_IN_TIMEOUT_INT | \
TX_RQ_IN_INT | TX_RQ_IN_TIMEOUT_INT)
#define DESC_WR_RD_ENA 0x05cc
#define IN_QUEUE_TH 0x05d8
#define OUT_QUEUE_TH 0x05dc
#define QUEUE_TX_BQ_SHIFT 16
#define RX_BQ_IN_TIMEOUT_TH 0x05e0
#define TX_RQ_IN_TIMEOUT_TH 0x05e4
#define STOP_CMD 0x05e8
#define BITS_TX_STOP BIT(1)
#define BITS_RX_STOP BIT(0)
#define FLUSH_CMD 0x05eC
#define BITS_TX_FLUSH_CMD BIT(5)
#define BITS_RX_FLUSH_CMD BIT(4)
#define BITS_TX_FLUSH_FLAG_DOWN BIT(3)
#define BITS_TX_FLUSH_FLAG_UP BIT(2)
#define BITS_RX_FLUSH_FLAG_DOWN BIT(1)
#define BITS_RX_FLUSH_FLAG_UP BIT(0)
#define RX_CFF_NUM_REG 0x05f0
#define PMU_FSM_REG 0x05f8
#define RX_FIFO_PKT_IN_NUM 0x05fc
#define RX_FIFO_PKT_OUT_NUM 0x0600
#define RGMII_SPEED_1000 0x2c
#define RGMII_SPEED_100 0x2f
#define RGMII_SPEED_10 0x2d
#define MII_SPEED_100 0x0f
#define MII_SPEED_10 0x0d
#define GMAC_SPEED_1000 0x05
#define GMAC_SPEED_100 0x01
#define GMAC_SPEED_10 0x00
#define GMAC_FULL_DUPLEX BIT(4)
#define RX_BQ_INT_THRESHOLD 0x01
#define TX_RQ_INT_THRESHOLD 0x01
#define RX_BQ_IN_TIMEOUT 0x10000
#define TX_RQ_IN_TIMEOUT 0x50000
#define MAC_MAX_FRAME_SIZE 1600
#define DESC_SIZE 32
#define RX_DESC_NUM 1024
#define TX_DESC_NUM 1024
#define DESC_VLD_FREE 0
#define DESC_VLD_BUSY 0x80000000
#define DESC_FL_MID 0
#define DESC_FL_LAST 0x20000000
#define DESC_FL_FIRST 0x40000000
#define DESC_FL_FULL 0x60000000
#define DESC_DATA_LEN_OFF 16
#define DESC_BUFF_LEN_OFF 0
#define DESC_DATA_MASK 0x7ff
/* DMA descriptor ring helpers */
#define dma_ring_incr(n, s) (((n) + 1) & ((s) - 1))
#define dma_cnt(n) ((n) >> 5)
#define dma_byte(n) ((n) << 5)
struct hix5hd2_desc {
__le32 buff_addr;
__le32 cmd;
} __aligned(32);
struct hix5hd2_desc_sw {
struct hix5hd2_desc *desc;
dma_addr_t phys_addr;
unsigned int count;
unsigned int size;
};
#define QUEUE_NUMS 4
struct hix5hd2_priv {
struct hix5hd2_desc_sw pool[QUEUE_NUMS];
#define rx_fq pool[0]
#define rx_bq pool[1]
#define tx_bq pool[2]
#define tx_rq pool[3]
void __iomem *base;
void __iomem *ctrl_base;
struct sk_buff *tx_skb[TX_DESC_NUM];
struct sk_buff *rx_skb[RX_DESC_NUM];
struct device *dev;
struct net_device *netdev;
struct phy_device *phy;
struct device_node *phy_node;
phy_interface_t phy_mode;
unsigned int speed;
unsigned int duplex;
struct clk *clk;
struct mii_bus *bus;
struct napi_struct napi;
struct work_struct tx_timeout_task;
};
static void hix5hd2_config_port(struct net_device *dev, u32 speed, u32 duplex)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
u32 val;
priv->speed = speed;
priv->duplex = duplex;
switch (priv->phy_mode) {
case PHY_INTERFACE_MODE_RGMII:
if (speed == SPEED_1000)
val = RGMII_SPEED_1000;
else if (speed == SPEED_100)
val = RGMII_SPEED_100;
else
val = RGMII_SPEED_10;
break;
case PHY_INTERFACE_MODE_MII:
if (speed == SPEED_100)
val = MII_SPEED_100;
else
val = MII_SPEED_10;
break;
default:
netdev_warn(dev, "not supported mode\n");
val = MII_SPEED_10;
break;
}
if (duplex)
val |= GMAC_FULL_DUPLEX;
writel_relaxed(val, priv->ctrl_base);
writel_relaxed(BIT_MODE_CHANGE_EN, priv->base + MODE_CHANGE_EN);
if (speed == SPEED_1000)
val = GMAC_SPEED_1000;
else if (speed == SPEED_100)
val = GMAC_SPEED_100;
else
val = GMAC_SPEED_10;
writel_relaxed(val, priv->base + PORT_MODE);
writel_relaxed(0, priv->base + MODE_CHANGE_EN);
writel_relaxed(duplex, priv->base + MAC_DUPLEX_HALF_CTRL);
}
static void hix5hd2_set_desc_depth(struct hix5hd2_priv *priv, int rx, int tx)
{
writel_relaxed(BITS_RX_FQ_DEPTH_EN, priv->base + RX_FQ_REG_EN);
writel_relaxed(rx << 3, priv->base + RX_FQ_DEPTH);
writel_relaxed(0, priv->base + RX_FQ_REG_EN);
writel_relaxed(BITS_RX_BQ_DEPTH_EN, priv->base + RX_BQ_REG_EN);
writel_relaxed(rx << 3, priv->base + RX_BQ_DEPTH);
writel_relaxed(0, priv->base + RX_BQ_REG_EN);
writel_relaxed(BITS_TX_BQ_DEPTH_EN, priv->base + TX_BQ_REG_EN);
writel_relaxed(tx << 3, priv->base + TX_BQ_DEPTH);
writel_relaxed(0, priv->base + TX_BQ_REG_EN);
writel_relaxed(BITS_TX_RQ_DEPTH_EN, priv->base + TX_RQ_REG_EN);
writel_relaxed(tx << 3, priv->base + TX_RQ_DEPTH);
writel_relaxed(0, priv->base + TX_RQ_REG_EN);
}
static void hix5hd2_set_rx_fq(struct hix5hd2_priv *priv, dma_addr_t phy_addr)
{
writel_relaxed(BITS_RX_FQ_START_ADDR_EN, priv->base + RX_FQ_REG_EN);
writel_relaxed(phy_addr, priv->base + RX_FQ_START_ADDR);
writel_relaxed(0, priv->base + RX_FQ_REG_EN);
}
static void hix5hd2_set_rx_bq(struct hix5hd2_priv *priv, dma_addr_t phy_addr)
{
writel_relaxed(BITS_RX_BQ_START_ADDR_EN, priv->base + RX_BQ_REG_EN);
writel_relaxed(phy_addr, priv->base + RX_BQ_START_ADDR);
writel_relaxed(0, priv->base + RX_BQ_REG_EN);
}
static void hix5hd2_set_tx_bq(struct hix5hd2_priv *priv, dma_addr_t phy_addr)
{
writel_relaxed(BITS_TX_BQ_START_ADDR_EN, priv->base + TX_BQ_REG_EN);
writel_relaxed(phy_addr, priv->base + TX_BQ_START_ADDR);
writel_relaxed(0, priv->base + TX_BQ_REG_EN);
}
static void hix5hd2_set_tx_rq(struct hix5hd2_priv *priv, dma_addr_t phy_addr)
{
writel_relaxed(BITS_TX_RQ_START_ADDR_EN, priv->base + TX_RQ_REG_EN);
writel_relaxed(phy_addr, priv->base + TX_RQ_START_ADDR);
writel_relaxed(0, priv->base + TX_RQ_REG_EN);
}
static void hix5hd2_set_desc_addr(struct hix5hd2_priv *priv)
{
hix5hd2_set_rx_fq(priv, priv->rx_fq.phys_addr);
hix5hd2_set_rx_bq(priv, priv->rx_bq.phys_addr);
hix5hd2_set_tx_rq(priv, priv->tx_rq.phys_addr);
hix5hd2_set_tx_bq(priv, priv->tx_bq.phys_addr);
}
static void hix5hd2_hw_init(struct hix5hd2_priv *priv)
{
u32 val;
/* disable and clear all interrupts */
writel_relaxed(0, priv->base + ENA_PMU_INT);
writel_relaxed(~0, priv->base + RAW_PMU_INT);
writel_relaxed(BIT_CRC_ERR_PASS, priv->base + REC_FILT_CONTROL);
writel_relaxed(MAC_MAX_FRAME_SIZE, priv->base + CONTROL_WORD);
writel_relaxed(0, priv->base + COL_SLOT_TIME);
val = RX_BQ_INT_THRESHOLD | TX_RQ_INT_THRESHOLD << QUEUE_TX_BQ_SHIFT;
writel_relaxed(val, priv->base + IN_QUEUE_TH);
writel_relaxed(RX_BQ_IN_TIMEOUT, priv->base + RX_BQ_IN_TIMEOUT_TH);
writel_relaxed(TX_RQ_IN_TIMEOUT, priv->base + TX_RQ_IN_TIMEOUT_TH);
hix5hd2_set_desc_depth(priv, RX_DESC_NUM, TX_DESC_NUM);
hix5hd2_set_desc_addr(priv);
}
static void hix5hd2_irq_enable(struct hix5hd2_priv *priv)
{
writel_relaxed(DEF_INT_MASK, priv->base + ENA_PMU_INT);
}
static void hix5hd2_irq_disable(struct hix5hd2_priv *priv)
{
writel_relaxed(0, priv->base + ENA_PMU_INT);
}
static void hix5hd2_port_enable(struct hix5hd2_priv *priv)
{
writel_relaxed(0xf, priv->base + DESC_WR_RD_ENA);
writel_relaxed(BITS_RX_EN | BITS_TX_EN, priv->base + PORT_EN);
}
static void hix5hd2_port_disable(struct hix5hd2_priv *priv)
{
writel_relaxed(~(BITS_RX_EN | BITS_TX_EN), priv->base + PORT_EN);
writel_relaxed(0, priv->base + DESC_WR_RD_ENA);
}
static void hix5hd2_hw_set_mac_addr(struct net_device *dev)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
unsigned char *mac = dev->dev_addr;
u32 val;
val = mac[1] | (mac[0] << 8);
writel_relaxed(val, priv->base + STATION_ADDR_HIGH);
val = mac[5] | (mac[4] << 8) | (mac[3] << 16) | (mac[2] << 24);
writel_relaxed(val, priv->base + STATION_ADDR_LOW);
}
static int hix5hd2_net_set_mac_address(struct net_device *dev, void *p)
{
int ret;
ret = eth_mac_addr(dev, p);
if (!ret)
hix5hd2_hw_set_mac_addr(dev);
return ret;
}
static void hix5hd2_adjust_link(struct net_device *dev)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
struct phy_device *phy = priv->phy;
if ((priv->speed != phy->speed) || (priv->duplex != phy->duplex)) {
hix5hd2_config_port(dev, phy->speed, phy->duplex);
phy_print_status(phy);
}
}
static void hix5hd2_rx_refill(struct hix5hd2_priv *priv)
{
struct hix5hd2_desc *desc;
struct sk_buff *skb;
u32 start, end, num, pos, i;
u32 len = MAC_MAX_FRAME_SIZE;
dma_addr_t addr;
/* software write pointer */
start = dma_cnt(readl_relaxed(priv->base + RX_FQ_WR_ADDR));
/* logic read pointer */
end = dma_cnt(readl_relaxed(priv->base + RX_FQ_RD_ADDR));
num = CIRC_SPACE(start, end, RX_DESC_NUM);
for (i = 0, pos = start; i < num; i++) {
if (priv->rx_skb[pos]) {
break;
} else {
skb = netdev_alloc_skb_ip_align(priv->netdev, len);
if (unlikely(skb == NULL))
break;
}
addr = dma_map_single(priv->dev, skb->data, len, DMA_FROM_DEVICE);
if (dma_mapping_error(priv->dev, addr)) {
dev_kfree_skb_any(skb);
break;
}
desc = priv->rx_fq.desc + pos;
desc->buff_addr = cpu_to_le32(addr);
priv->rx_skb[pos] = skb;
desc->cmd = cpu_to_le32(DESC_VLD_FREE |
(len - 1) << DESC_BUFF_LEN_OFF);
pos = dma_ring_incr(pos, RX_DESC_NUM);
}
/* ensure desc updated */
wmb();
if (pos != start)
writel_relaxed(dma_byte(pos), priv->base + RX_FQ_WR_ADDR);
}
static int hix5hd2_rx(struct net_device *dev, int limit)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
struct sk_buff *skb;
struct hix5hd2_desc *desc;
dma_addr_t addr;
u32 start, end, num, pos, i, len;
/* software read pointer */
start = dma_cnt(readl_relaxed(priv->base + RX_BQ_RD_ADDR));
/* logic write pointer */
end = dma_cnt(readl_relaxed(priv->base + RX_BQ_WR_ADDR));
num = CIRC_CNT(end, start, RX_DESC_NUM);
if (num > limit)
num = limit;
/* ensure get updated desc */
rmb();
for (i = 0, pos = start; i < num; i++) {
skb = priv->rx_skb[pos];
if (unlikely(!skb)) {
netdev_err(dev, "inconsistent rx_skb\n");
break;
}
priv->rx_skb[pos] = NULL;
desc = priv->rx_bq.desc + pos;
len = (le32_to_cpu(desc->cmd) >> DESC_DATA_LEN_OFF) &
DESC_DATA_MASK;
addr = le32_to_cpu(desc->buff_addr);
dma_unmap_single(priv->dev, addr, MAC_MAX_FRAME_SIZE,
DMA_FROM_DEVICE);
skb_put(skb, len);
if (skb->len > MAC_MAX_FRAME_SIZE) {
netdev_err(dev, "rcv len err, len = %d\n", skb->len);
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
dev_kfree_skb_any(skb);
goto next;
}
skb->protocol = eth_type_trans(skb, dev);
napi_gro_receive(&priv->napi, skb);
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
next:
pos = dma_ring_incr(pos, RX_DESC_NUM);
}
if (pos != start)
writel_relaxed(dma_byte(pos), priv->base + RX_BQ_RD_ADDR);
hix5hd2_rx_refill(priv);
return num;
}
static void hix5hd2_xmit_reclaim(struct net_device *dev)
{
struct sk_buff *skb;
struct hix5hd2_desc *desc;
struct hix5hd2_priv *priv = netdev_priv(dev);
unsigned int bytes_compl = 0, pkts_compl = 0;
u32 start, end, num, pos, i;
dma_addr_t addr;
netif_tx_lock(dev);
/* software read */
start = dma_cnt(readl_relaxed(priv->base + TX_RQ_RD_ADDR));
/* logic write */
end = dma_cnt(readl_relaxed(priv->base + TX_RQ_WR_ADDR));
num = CIRC_CNT(end, start, TX_DESC_NUM);
for (i = 0, pos = start; i < num; i++) {
skb = priv->tx_skb[pos];
if (unlikely(!skb)) {
netdev_err(dev, "inconsistent tx_skb\n");
break;
}
pkts_compl++;
bytes_compl += skb->len;
desc = priv->tx_rq.desc + pos;
addr = le32_to_cpu(desc->buff_addr);
dma_unmap_single(priv->dev, addr, skb->len, DMA_TO_DEVICE);
priv->tx_skb[pos] = NULL;
dev_consume_skb_any(skb);
pos = dma_ring_incr(pos, TX_DESC_NUM);
}
if (pos != start)
writel_relaxed(dma_byte(pos), priv->base + TX_RQ_RD_ADDR);
netif_tx_unlock(dev);
if (pkts_compl || bytes_compl)
netdev_completed_queue(dev, pkts_compl, bytes_compl);
if (unlikely(netif_queue_stopped(priv->netdev)) && pkts_compl)
netif_wake_queue(priv->netdev);
}
static int hix5hd2_poll(struct napi_struct *napi, int budget)
{
struct hix5hd2_priv *priv = container_of(napi,
struct hix5hd2_priv, napi);
struct net_device *dev = priv->netdev;
int work_done = 0, task = budget;
int ints, num;
do {
hix5hd2_xmit_reclaim(dev);
num = hix5hd2_rx(dev, task);
work_done += num;
task -= num;
if ((work_done >= budget) || (num == 0))
break;
ints = readl_relaxed(priv->base + RAW_PMU_INT);
writel_relaxed(ints, priv->base + RAW_PMU_INT);
} while (ints & DEF_INT_MASK);
if (work_done < budget) {
napi_complete(napi);
hix5hd2_irq_enable(priv);
}
return work_done;
}
static irqreturn_t hix5hd2_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct hix5hd2_priv *priv = netdev_priv(dev);
int ints = readl_relaxed(priv->base + RAW_PMU_INT);
writel_relaxed(ints, priv->base + RAW_PMU_INT);
if (likely(ints & DEF_INT_MASK)) {
hix5hd2_irq_disable(priv);
napi_schedule(&priv->napi);
}
return IRQ_HANDLED;
}
static int hix5hd2_net_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
struct hix5hd2_desc *desc;
dma_addr_t addr;
u32 pos;
/* software write pointer */
pos = dma_cnt(readl_relaxed(priv->base + TX_BQ_WR_ADDR));
if (unlikely(priv->tx_skb[pos])) {
dev->stats.tx_dropped++;
dev->stats.tx_fifo_errors++;
netif_stop_queue(dev);
return NETDEV_TX_BUSY;
}
addr = dma_map_single(priv->dev, skb->data, skb->len, DMA_TO_DEVICE);
if (dma_mapping_error(priv->dev, addr)) {
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
desc = priv->tx_bq.desc + pos;
desc->buff_addr = cpu_to_le32(addr);
priv->tx_skb[pos] = skb;
desc->cmd = cpu_to_le32(DESC_VLD_BUSY | DESC_FL_FULL |
(skb->len & DESC_DATA_MASK) << DESC_DATA_LEN_OFF |
(skb->len & DESC_DATA_MASK) << DESC_BUFF_LEN_OFF);
/* ensure desc updated */
wmb();
pos = dma_ring_incr(pos, TX_DESC_NUM);
writel_relaxed(dma_byte(pos), priv->base + TX_BQ_WR_ADDR);
dev->trans_start = jiffies;
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
netdev_sent_queue(dev, skb->len);
return NETDEV_TX_OK;
}
static void hix5hd2_free_dma_desc_rings(struct hix5hd2_priv *priv)
{
struct hix5hd2_desc *desc;
dma_addr_t addr;
int i;
for (i = 0; i < RX_DESC_NUM; i++) {
struct sk_buff *skb = priv->rx_skb[i];
if (skb == NULL)
continue;
desc = priv->rx_fq.desc + i;
addr = le32_to_cpu(desc->buff_addr);
dma_unmap_single(priv->dev, addr,
MAC_MAX_FRAME_SIZE, DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
priv->rx_skb[i] = NULL;
}
for (i = 0; i < TX_DESC_NUM; i++) {
struct sk_buff *skb = priv->tx_skb[i];
if (skb == NULL)
continue;
desc = priv->tx_rq.desc + i;
addr = le32_to_cpu(desc->buff_addr);
dma_unmap_single(priv->dev, addr, skb->len, DMA_TO_DEVICE);
dev_kfree_skb_any(skb);
priv->tx_skb[i] = NULL;
}
}
static int hix5hd2_net_open(struct net_device *dev)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
int ret;
ret = clk_prepare_enable(priv->clk);
if (ret < 0) {
netdev_err(dev, "failed to enable clk %d\n", ret);
return ret;
}
priv->phy = of_phy_connect(dev, priv->phy_node,
&hix5hd2_adjust_link, 0, priv->phy_mode);
if (!priv->phy)
return -ENODEV;
phy_start(priv->phy);
hix5hd2_hw_init(priv);
hix5hd2_rx_refill(priv);
netdev_reset_queue(dev);
netif_start_queue(dev);
napi_enable(&priv->napi);
hix5hd2_port_enable(priv);
hix5hd2_irq_enable(priv);
return 0;
}
static int hix5hd2_net_close(struct net_device *dev)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
hix5hd2_port_disable(priv);
hix5hd2_irq_disable(priv);
napi_disable(&priv->napi);
netif_stop_queue(dev);
hix5hd2_free_dma_desc_rings(priv);
if (priv->phy) {
phy_stop(priv->phy);
phy_disconnect(priv->phy);
}
clk_disable_unprepare(priv->clk);
return 0;
}
static void hix5hd2_tx_timeout_task(struct work_struct *work)
{
struct hix5hd2_priv *priv;
priv = container_of(work, struct hix5hd2_priv, tx_timeout_task);
hix5hd2_net_close(priv->netdev);
hix5hd2_net_open(priv->netdev);
}
static void hix5hd2_net_timeout(struct net_device *dev)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
schedule_work(&priv->tx_timeout_task);
}
static const struct net_device_ops hix5hd2_netdev_ops = {
.ndo_open = hix5hd2_net_open,
.ndo_stop = hix5hd2_net_close,
.ndo_start_xmit = hix5hd2_net_xmit,
.ndo_tx_timeout = hix5hd2_net_timeout,
.ndo_set_mac_address = hix5hd2_net_set_mac_address,
};
static int hix5hd2_get_settings(struct net_device *net_dev,
struct ethtool_cmd *cmd)
{
struct hix5hd2_priv *priv = netdev_priv(net_dev);
if (!priv->phy)
return -ENODEV;
return phy_ethtool_gset(priv->phy, cmd);
}
static int hix5hd2_set_settings(struct net_device *net_dev,
struct ethtool_cmd *cmd)
{
struct hix5hd2_priv *priv = netdev_priv(net_dev);
if (!priv->phy)
return -ENODEV;
return phy_ethtool_sset(priv->phy, cmd);
}
static struct ethtool_ops hix5hd2_ethtools_ops = {
.get_link = ethtool_op_get_link,
.get_settings = hix5hd2_get_settings,
.set_settings = hix5hd2_set_settings,
};
static int hix5hd2_mdio_wait_ready(struct mii_bus *bus)
{
struct hix5hd2_priv *priv = bus->priv;
void __iomem *base = priv->base;
int i, timeout = 10000;
for (i = 0; readl_relaxed(base + MDIO_SINGLE_CMD) & MDIO_START; i++) {
if (i == timeout)
return -ETIMEDOUT;
usleep_range(10, 20);
}
return 0;
}
static int hix5hd2_mdio_read(struct mii_bus *bus, int phy, int reg)
{
struct hix5hd2_priv *priv = bus->priv;
void __iomem *base = priv->base;
int val, ret;
ret = hix5hd2_mdio_wait_ready(bus);
if (ret < 0)
goto out;
writel_relaxed(MDIO_READ | phy << 8 | reg, base + MDIO_SINGLE_CMD);
ret = hix5hd2_mdio_wait_ready(bus);
if (ret < 0)
goto out;
val = readl_relaxed(base + MDIO_RDATA_STATUS);
if (val & MDIO_R_VALID) {
dev_err(bus->parent, "SMI bus read not valid\n");
ret = -ENODEV;
goto out;
}
val = readl_relaxed(priv->base + MDIO_SINGLE_DATA);
ret = (val >> 16) & 0xFFFF;
out:
return ret;
}
static int hix5hd2_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
{
struct hix5hd2_priv *priv = bus->priv;
void __iomem *base = priv->base;
int ret;
ret = hix5hd2_mdio_wait_ready(bus);
if (ret < 0)
goto out;
writel_relaxed(val, base + MDIO_SINGLE_DATA);
writel_relaxed(MDIO_WRITE | phy << 8 | reg, base + MDIO_SINGLE_CMD);
ret = hix5hd2_mdio_wait_ready(bus);
out:
return ret;
}
static void hix5hd2_destroy_hw_desc_queue(struct hix5hd2_priv *priv)
{
int i;
for (i = 0; i < QUEUE_NUMS; i++) {
if (priv->pool[i].desc) {
dma_free_coherent(priv->dev, priv->pool[i].size,
priv->pool[i].desc,
priv->pool[i].phys_addr);
priv->pool[i].desc = NULL;
}
}
}
static int hix5hd2_init_hw_desc_queue(struct hix5hd2_priv *priv)
{
struct device *dev = priv->dev;
struct hix5hd2_desc *virt_addr;
dma_addr_t phys_addr;
int size, i;
priv->rx_fq.count = RX_DESC_NUM;
priv->rx_bq.count = RX_DESC_NUM;
priv->tx_bq.count = TX_DESC_NUM;
priv->tx_rq.count = TX_DESC_NUM;
for (i = 0; i < QUEUE_NUMS; i++) {
size = priv->pool[i].count * sizeof(struct hix5hd2_desc);
virt_addr = dma_alloc_coherent(dev, size, &phys_addr,
GFP_KERNEL);
if (virt_addr == NULL)
goto error_free_pool;
memset(virt_addr, 0, size);
priv->pool[i].size = size;
priv->pool[i].desc = virt_addr;
priv->pool[i].phys_addr = phys_addr;
}
return 0;
error_free_pool:
hix5hd2_destroy_hw_desc_queue(priv);
return -ENOMEM;
}
static int hix5hd2_dev_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct net_device *ndev;
struct hix5hd2_priv *priv;
struct resource *res;
struct mii_bus *bus;
const char *mac_addr;
int ret;
ndev = alloc_etherdev(sizeof(struct hix5hd2_priv));
if (!ndev)
return -ENOMEM;
platform_set_drvdata(pdev, ndev);
priv = netdev_priv(ndev);
priv->dev = dev;
priv->netdev = ndev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->base = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->base)) {
ret = PTR_ERR(priv->base);
goto out_free_netdev;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
priv->ctrl_base = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->ctrl_base)) {
ret = PTR_ERR(priv->ctrl_base);
goto out_free_netdev;
}
priv->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->clk)) {
netdev_err(ndev, "failed to get clk\n");
ret = -ENODEV;
goto out_free_netdev;
}
ret = clk_prepare_enable(priv->clk);
if (ret < 0) {
netdev_err(ndev, "failed to enable clk %d\n", ret);
goto out_free_netdev;
}
bus = mdiobus_alloc();
if (bus == NULL) {
ret = -ENOMEM;
goto out_free_netdev;
}
bus->priv = priv;
bus->name = "hix5hd2_mii_bus";
bus->read = hix5hd2_mdio_read;
bus->write = hix5hd2_mdio_write;
bus->parent = &pdev->dev;
snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev));
priv->bus = bus;
ret = of_mdiobus_register(bus, node);
if (ret)
goto err_free_mdio;
priv->phy_mode = of_get_phy_mode(node);
if (priv->phy_mode < 0) {
netdev_err(ndev, "not find phy-mode\n");
ret = -EINVAL;
goto err_mdiobus;
}
priv->phy_node = of_parse_phandle(node, "phy-handle", 0);
if (!priv->phy_node) {
netdev_err(ndev, "not find phy-handle\n");
ret = -EINVAL;
goto err_mdiobus;
}
ndev->irq = platform_get_irq(pdev, 0);
if (ndev->irq <= 0) {
netdev_err(ndev, "No irq resource\n");
ret = -EINVAL;
goto out_phy_node;
}
ret = devm_request_irq(dev, ndev->irq, hix5hd2_interrupt,
0, pdev->name, ndev);
if (ret) {
netdev_err(ndev, "devm_request_irq failed\n");
goto out_phy_node;
}
mac_addr = of_get_mac_address(node);
if (mac_addr)
ether_addr_copy(ndev->dev_addr, mac_addr);
if (!is_valid_ether_addr(ndev->dev_addr)) {
eth_hw_addr_random(ndev);
netdev_warn(ndev, "using random MAC address %pM\n",
ndev->dev_addr);
}
INIT_WORK(&priv->tx_timeout_task, hix5hd2_tx_timeout_task);
ndev->watchdog_timeo = 6 * HZ;
ndev->priv_flags |= IFF_UNICAST_FLT;
ndev->netdev_ops = &hix5hd2_netdev_ops;
ndev->ethtool_ops = &hix5hd2_ethtools_ops;
SET_NETDEV_DEV(ndev, dev);
ret = hix5hd2_init_hw_desc_queue(priv);
if (ret)
goto out_phy_node;
netif_napi_add(ndev, &priv->napi, hix5hd2_poll, NAPI_POLL_WEIGHT);
ret = register_netdev(priv->netdev);
if (ret) {
netdev_err(ndev, "register_netdev failed!");
goto out_destroy_queue;
}
clk_disable_unprepare(priv->clk);
return ret;
out_destroy_queue:
netif_napi_del(&priv->napi);
hix5hd2_destroy_hw_desc_queue(priv);
out_phy_node:
of_node_put(priv->phy_node);
err_mdiobus:
mdiobus_unregister(bus);
err_free_mdio:
mdiobus_free(bus);
out_free_netdev:
free_netdev(ndev);
return ret;
}
static int hix5hd2_dev_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct hix5hd2_priv *priv = netdev_priv(ndev);
netif_napi_del(&priv->napi);
unregister_netdev(ndev);
mdiobus_unregister(priv->bus);
mdiobus_free(priv->bus);
hix5hd2_destroy_hw_desc_queue(priv);
of_node_put(priv->phy_node);
cancel_work_sync(&priv->tx_timeout_task);
free_netdev(ndev);
return 0;
}
static const struct of_device_id hix5hd2_of_match[] = {
{.compatible = "hisilicon,hix5hd2-gmac",},
{},
};
MODULE_DEVICE_TABLE(of, hix5hd2_of_match);
static struct platform_driver hix5hd2_dev_driver = {
.driver = {
.name = "hix5hd2-gmac",
.of_match_table = hix5hd2_of_match,
},
.probe = hix5hd2_dev_probe,
.remove = hix5hd2_dev_remove,
};
module_platform_driver(hix5hd2_dev_driver);
MODULE_DESCRIPTION("HISILICON HIX5HD2 Ethernet driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:hix5hd2-gmac");
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