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linux/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
Zhangfei Gao 57c5bc9ad7 net: hisilicon: add hix5hd2 mac driver 
Add support for the hix5hd2 XGMAC 1Gb ethernet device.
The controller requires two queues for tx and two queues for rx.
Controller fetch buffer from free queue and then push to used queue.
Diver should prepare free queue and free buffer from used queue.

Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-02 23:39:05 -07:00

1067 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;
dev->last_rx = jiffies;
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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