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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/net/ethernet/hisilicon
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/net/ethernet/hisilicon')
-rw-r--r--kernel/drivers/net/ethernet/hisilicon/Kconfig36
-rw-r--r--kernel/drivers/net/ethernet/hisilicon/Makefile6
-rw-r--r--kernel/drivers/net/ethernet/hisilicon/hip04_eth.c975
-rw-r--r--kernel/drivers/net/ethernet/hisilicon/hip04_mdio.c186
-rw-r--r--kernel/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c1066
5 files changed, 2269 insertions, 0 deletions
diff --git a/kernel/drivers/net/ethernet/hisilicon/Kconfig b/kernel/drivers/net/ethernet/hisilicon/Kconfig
new file mode 100644
index 000000000..a54d89791
--- /dev/null
+++ b/kernel/drivers/net/ethernet/hisilicon/Kconfig
@@ -0,0 +1,36 @@
+#
+# HISILICON device configuration
+#
+
+config NET_VENDOR_HISILICON
+ bool "Hisilicon devices"
+ default y
+ depends on ARM
+ ---help---
+ If you have a network (Ethernet) card belonging to this class, say Y
+ and read the Ethernet-HOWTO, available from
+ <http://www.tldp.org/docs.html#howto>.
+
+ Note that the answer to this question doesn't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ the questions about Hisilicon devices. If you say Y, you will be asked
+ for your specific card in the following questions.
+
+if NET_VENDOR_HISILICON
+
+config HIX5HD2_GMAC
+ tristate "Hisilicon HIX5HD2 Family Network Device Support"
+ select PHYLIB
+ help
+ This selects the hix5hd2 mac family network device.
+
+config HIP04_ETH
+ tristate "HISILICON P04 Ethernet support"
+ select PHYLIB
+ select MARVELL_PHY
+ select MFD_SYSCON
+ ---help---
+ If you wish to compile a kernel for a hardware with hisilicon p04 SoC and
+ want to use the internal ethernet then you should answer Y to this.
+
+endif # NET_VENDOR_HISILICON
diff --git a/kernel/drivers/net/ethernet/hisilicon/Makefile b/kernel/drivers/net/ethernet/hisilicon/Makefile
new file mode 100644
index 000000000..6c14540a4
--- /dev/null
+++ b/kernel/drivers/net/ethernet/hisilicon/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the HISILICON network device drivers.
+#
+
+obj-$(CONFIG_HIX5HD2_GMAC) += hix5hd2_gmac.o
+obj-$(CONFIG_HIP04_ETH) += hip04_mdio.o hip04_eth.o
diff --git a/kernel/drivers/net/ethernet/hisilicon/hip04_eth.c b/kernel/drivers/net/ethernet/hisilicon/hip04_eth.c
new file mode 100644
index 000000000..3b39fddde
--- /dev/null
+++ b/kernel/drivers/net/ethernet/hisilicon/hip04_eth.c
@@ -0,0 +1,975 @@
+
+/* 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/etherdevice.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/ktime.h>
+#include <linux/of_address.h>
+#include <linux/phy.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+#define PPE_CFG_RX_ADDR 0x100
+#define PPE_CFG_POOL_GRP 0x300
+#define PPE_CFG_RX_BUF_SIZE 0x400
+#define PPE_CFG_RX_FIFO_SIZE 0x500
+#define PPE_CURR_BUF_CNT 0xa200
+
+#define GE_DUPLEX_TYPE 0x08
+#define GE_MAX_FRM_SIZE_REG 0x3c
+#define GE_PORT_MODE 0x40
+#define GE_PORT_EN 0x44
+#define GE_SHORT_RUNTS_THR_REG 0x50
+#define GE_TX_LOCAL_PAGE_REG 0x5c
+#define GE_TRANSMIT_CONTROL_REG 0x60
+#define GE_CF_CRC_STRIP_REG 0x1b0
+#define GE_MODE_CHANGE_REG 0x1b4
+#define GE_RECV_CONTROL_REG 0x1e0
+#define GE_STATION_MAC_ADDRESS 0x210
+#define PPE_CFG_CPU_ADD_ADDR 0x580
+#define PPE_CFG_MAX_FRAME_LEN_REG 0x408
+#define PPE_CFG_BUS_CTRL_REG 0x424
+#define PPE_CFG_RX_CTRL_REG 0x428
+#define PPE_CFG_RX_PKT_MODE_REG 0x438
+#define PPE_CFG_QOS_VMID_GEN 0x500
+#define PPE_CFG_RX_PKT_INT 0x538
+#define PPE_INTEN 0x600
+#define PPE_INTSTS 0x608
+#define PPE_RINT 0x604
+#define PPE_CFG_STS_MODE 0x700
+#define PPE_HIS_RX_PKT_CNT 0x804
+
+/* REG_INTERRUPT */
+#define RCV_INT BIT(10)
+#define RCV_NOBUF BIT(8)
+#define RCV_DROP BIT(7)
+#define TX_DROP BIT(6)
+#define DEF_INT_ERR (RCV_NOBUF | RCV_DROP | TX_DROP)
+#define DEF_INT_MASK (RCV_INT | DEF_INT_ERR)
+
+/* TX descriptor config */
+#define TX_FREE_MEM BIT(0)
+#define TX_READ_ALLOC_L3 BIT(1)
+#define TX_FINISH_CACHE_INV BIT(2)
+#define TX_CLEAR_WB BIT(4)
+#define TX_L3_CHECKSUM BIT(5)
+#define TX_LOOP_BACK BIT(11)
+
+/* RX error */
+#define RX_PKT_DROP BIT(0)
+#define RX_L2_ERR BIT(1)
+#define RX_PKT_ERR (RX_PKT_DROP | RX_L2_ERR)
+
+#define SGMII_SPEED_1000 0x08
+#define SGMII_SPEED_100 0x07
+#define SGMII_SPEED_10 0x06
+#define MII_SPEED_100 0x01
+#define MII_SPEED_10 0x00
+
+#define GE_DUPLEX_FULL BIT(0)
+#define GE_DUPLEX_HALF 0x00
+#define GE_MODE_CHANGE_EN BIT(0)
+
+#define GE_TX_AUTO_NEG BIT(5)
+#define GE_TX_ADD_CRC BIT(6)
+#define GE_TX_SHORT_PAD_THROUGH BIT(7)
+
+#define GE_RX_STRIP_CRC BIT(0)
+#define GE_RX_STRIP_PAD BIT(3)
+#define GE_RX_PAD_EN BIT(4)
+
+#define GE_AUTO_NEG_CTL BIT(0)
+
+#define GE_RX_INT_THRESHOLD BIT(6)
+#define GE_RX_TIMEOUT 0x04
+
+#define GE_RX_PORT_EN BIT(1)
+#define GE_TX_PORT_EN BIT(2)
+
+#define PPE_CFG_STS_RX_PKT_CNT_RC BIT(12)
+
+#define PPE_CFG_RX_PKT_ALIGN BIT(18)
+#define PPE_CFG_QOS_VMID_MODE BIT(14)
+#define PPE_CFG_QOS_VMID_GRP_SHIFT 8
+
+#define PPE_CFG_RX_FIFO_FSFU BIT(11)
+#define PPE_CFG_RX_DEPTH_SHIFT 16
+#define PPE_CFG_RX_START_SHIFT 0
+#define PPE_CFG_RX_CTRL_ALIGN_SHIFT 11
+
+#define PPE_CFG_BUS_LOCAL_REL BIT(14)
+#define PPE_CFG_BUS_BIG_ENDIEN BIT(0)
+
+#define RX_DESC_NUM 128
+#define TX_DESC_NUM 256
+#define TX_NEXT(N) (((N) + 1) & (TX_DESC_NUM-1))
+#define RX_NEXT(N) (((N) + 1) & (RX_DESC_NUM-1))
+
+#define GMAC_PPE_RX_PKT_MAX_LEN 379
+#define GMAC_MAX_PKT_LEN 1516
+#define GMAC_MIN_PKT_LEN 31
+#define RX_BUF_SIZE 1600
+#define RESET_TIMEOUT 1000
+#define TX_TIMEOUT (6 * HZ)
+
+#define DRV_NAME "hip04-ether"
+#define DRV_VERSION "v1.0"
+
+#define HIP04_MAX_TX_COALESCE_USECS 200
+#define HIP04_MIN_TX_COALESCE_USECS 100
+#define HIP04_MAX_TX_COALESCE_FRAMES 200
+#define HIP04_MIN_TX_COALESCE_FRAMES 100
+
+struct tx_desc {
+ u32 send_addr;
+ u32 send_size;
+ u32 next_addr;
+ u32 cfg;
+ u32 wb_addr;
+} __aligned(64);
+
+struct rx_desc {
+ u16 reserved_16;
+ u16 pkt_len;
+ u32 reserve1[3];
+ u32 pkt_err;
+ u32 reserve2[4];
+};
+
+struct hip04_priv {
+ void __iomem *base;
+ int phy_mode;
+ int chan;
+ unsigned int port;
+ unsigned int speed;
+ unsigned int duplex;
+ unsigned int reg_inten;
+
+ struct napi_struct napi;
+ struct net_device *ndev;
+
+ struct tx_desc *tx_desc;
+ dma_addr_t tx_desc_dma;
+ struct sk_buff *tx_skb[TX_DESC_NUM];
+ dma_addr_t tx_phys[TX_DESC_NUM];
+ unsigned int tx_head;
+
+ int tx_coalesce_frames;
+ int tx_coalesce_usecs;
+ struct hrtimer tx_coalesce_timer;
+
+ unsigned char *rx_buf[RX_DESC_NUM];
+ dma_addr_t rx_phys[RX_DESC_NUM];
+ unsigned int rx_head;
+ unsigned int rx_buf_size;
+
+ struct device_node *phy_node;
+ struct phy_device *phy;
+ struct regmap *map;
+ struct work_struct tx_timeout_task;
+
+ /* written only by tx cleanup */
+ unsigned int tx_tail ____cacheline_aligned_in_smp;
+};
+
+static inline unsigned int tx_count(unsigned int head, unsigned int tail)
+{
+ return (head - tail) % (TX_DESC_NUM - 1);
+}
+
+static void hip04_config_port(struct net_device *ndev, u32 speed, u32 duplex)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ u32 val;
+
+ priv->speed = speed;
+ priv->duplex = duplex;
+
+ switch (priv->phy_mode) {
+ case PHY_INTERFACE_MODE_SGMII:
+ if (speed == SPEED_1000)
+ val = SGMII_SPEED_1000;
+ else if (speed == SPEED_100)
+ val = SGMII_SPEED_100;
+ else
+ val = SGMII_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(ndev, "not supported mode\n");
+ val = MII_SPEED_10;
+ break;
+ }
+ writel_relaxed(val, priv->base + GE_PORT_MODE);
+
+ val = duplex ? GE_DUPLEX_FULL : GE_DUPLEX_HALF;
+ writel_relaxed(val, priv->base + GE_DUPLEX_TYPE);
+
+ val = GE_MODE_CHANGE_EN;
+ writel_relaxed(val, priv->base + GE_MODE_CHANGE_REG);
+}
+
+static void hip04_reset_ppe(struct hip04_priv *priv)
+{
+ u32 val, tmp, timeout = 0;
+
+ do {
+ regmap_read(priv->map, priv->port * 4 + PPE_CURR_BUF_CNT, &val);
+ regmap_read(priv->map, priv->port * 4 + PPE_CFG_RX_ADDR, &tmp);
+ if (timeout++ > RESET_TIMEOUT)
+ break;
+ } while (val & 0xfff);
+}
+
+static void hip04_config_fifo(struct hip04_priv *priv)
+{
+ u32 val;
+
+ val = readl_relaxed(priv->base + PPE_CFG_STS_MODE);
+ val |= PPE_CFG_STS_RX_PKT_CNT_RC;
+ writel_relaxed(val, priv->base + PPE_CFG_STS_MODE);
+
+ val = BIT(priv->port);
+ regmap_write(priv->map, priv->port * 4 + PPE_CFG_POOL_GRP, val);
+
+ val = priv->port << PPE_CFG_QOS_VMID_GRP_SHIFT;
+ val |= PPE_CFG_QOS_VMID_MODE;
+ writel_relaxed(val, priv->base + PPE_CFG_QOS_VMID_GEN);
+
+ val = RX_BUF_SIZE;
+ regmap_write(priv->map, priv->port * 4 + PPE_CFG_RX_BUF_SIZE, val);
+
+ val = RX_DESC_NUM << PPE_CFG_RX_DEPTH_SHIFT;
+ val |= PPE_CFG_RX_FIFO_FSFU;
+ val |= priv->chan << PPE_CFG_RX_START_SHIFT;
+ regmap_write(priv->map, priv->port * 4 + PPE_CFG_RX_FIFO_SIZE, val);
+
+ val = NET_IP_ALIGN << PPE_CFG_RX_CTRL_ALIGN_SHIFT;
+ writel_relaxed(val, priv->base + PPE_CFG_RX_CTRL_REG);
+
+ val = PPE_CFG_RX_PKT_ALIGN;
+ writel_relaxed(val, priv->base + PPE_CFG_RX_PKT_MODE_REG);
+
+ val = PPE_CFG_BUS_LOCAL_REL | PPE_CFG_BUS_BIG_ENDIEN;
+ writel_relaxed(val, priv->base + PPE_CFG_BUS_CTRL_REG);
+
+ val = GMAC_PPE_RX_PKT_MAX_LEN;
+ writel_relaxed(val, priv->base + PPE_CFG_MAX_FRAME_LEN_REG);
+
+ val = GMAC_MAX_PKT_LEN;
+ writel_relaxed(val, priv->base + GE_MAX_FRM_SIZE_REG);
+
+ val = GMAC_MIN_PKT_LEN;
+ writel_relaxed(val, priv->base + GE_SHORT_RUNTS_THR_REG);
+
+ val = readl_relaxed(priv->base + GE_TRANSMIT_CONTROL_REG);
+ val |= GE_TX_AUTO_NEG | GE_TX_ADD_CRC | GE_TX_SHORT_PAD_THROUGH;
+ writel_relaxed(val, priv->base + GE_TRANSMIT_CONTROL_REG);
+
+ val = GE_RX_STRIP_CRC;
+ writel_relaxed(val, priv->base + GE_CF_CRC_STRIP_REG);
+
+ val = readl_relaxed(priv->base + GE_RECV_CONTROL_REG);
+ val |= GE_RX_STRIP_PAD | GE_RX_PAD_EN;
+ writel_relaxed(val, priv->base + GE_RECV_CONTROL_REG);
+
+ val = GE_AUTO_NEG_CTL;
+ writel_relaxed(val, priv->base + GE_TX_LOCAL_PAGE_REG);
+}
+
+static void hip04_mac_enable(struct net_device *ndev)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ u32 val;
+
+ /* enable tx & rx */
+ val = readl_relaxed(priv->base + GE_PORT_EN);
+ val |= GE_RX_PORT_EN | GE_TX_PORT_EN;
+ writel_relaxed(val, priv->base + GE_PORT_EN);
+
+ /* clear rx int */
+ val = RCV_INT;
+ writel_relaxed(val, priv->base + PPE_RINT);
+
+ /* config recv int */
+ val = GE_RX_INT_THRESHOLD | GE_RX_TIMEOUT;
+ writel_relaxed(val, priv->base + PPE_CFG_RX_PKT_INT);
+
+ /* enable interrupt */
+ priv->reg_inten = DEF_INT_MASK;
+ writel_relaxed(priv->reg_inten, priv->base + PPE_INTEN);
+}
+
+static void hip04_mac_disable(struct net_device *ndev)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ u32 val;
+
+ /* disable int */
+ priv->reg_inten &= ~(DEF_INT_MASK);
+ writel_relaxed(priv->reg_inten, priv->base + PPE_INTEN);
+
+ /* disable tx & rx */
+ val = readl_relaxed(priv->base + GE_PORT_EN);
+ val &= ~(GE_RX_PORT_EN | GE_TX_PORT_EN);
+ writel_relaxed(val, priv->base + GE_PORT_EN);
+}
+
+static void hip04_set_xmit_desc(struct hip04_priv *priv, dma_addr_t phys)
+{
+ writel(phys, priv->base + PPE_CFG_CPU_ADD_ADDR);
+}
+
+static void hip04_set_recv_desc(struct hip04_priv *priv, dma_addr_t phys)
+{
+ regmap_write(priv->map, priv->port * 4 + PPE_CFG_RX_ADDR, phys);
+}
+
+static u32 hip04_recv_cnt(struct hip04_priv *priv)
+{
+ return readl(priv->base + PPE_HIS_RX_PKT_CNT);
+}
+
+static void hip04_update_mac_address(struct net_device *ndev)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+
+ writel_relaxed(((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1])),
+ priv->base + GE_STATION_MAC_ADDRESS);
+ writel_relaxed(((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) |
+ (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5])),
+ priv->base + GE_STATION_MAC_ADDRESS + 4);
+}
+
+static int hip04_set_mac_address(struct net_device *ndev, void *addr)
+{
+ eth_mac_addr(ndev, addr);
+ hip04_update_mac_address(ndev);
+ return 0;
+}
+
+static int hip04_tx_reclaim(struct net_device *ndev, bool force)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ unsigned tx_tail = priv->tx_tail;
+ struct tx_desc *desc;
+ unsigned int bytes_compl = 0, pkts_compl = 0;
+ unsigned int count;
+
+ smp_rmb();
+ count = tx_count(ACCESS_ONCE(priv->tx_head), tx_tail);
+ if (count == 0)
+ goto out;
+
+ while (count) {
+ desc = &priv->tx_desc[tx_tail];
+ if (desc->send_addr != 0) {
+ if (force)
+ desc->send_addr = 0;
+ else
+ break;
+ }
+
+ if (priv->tx_phys[tx_tail]) {
+ dma_unmap_single(&ndev->dev, priv->tx_phys[tx_tail],
+ priv->tx_skb[tx_tail]->len,
+ DMA_TO_DEVICE);
+ priv->tx_phys[tx_tail] = 0;
+ }
+ pkts_compl++;
+ bytes_compl += priv->tx_skb[tx_tail]->len;
+ dev_kfree_skb(priv->tx_skb[tx_tail]);
+ priv->tx_skb[tx_tail] = NULL;
+ tx_tail = TX_NEXT(tx_tail);
+ count--;
+ }
+
+ priv->tx_tail = tx_tail;
+ smp_wmb(); /* Ensure tx_tail visible to xmit */
+
+out:
+ if (pkts_compl || bytes_compl)
+ netdev_completed_queue(ndev, pkts_compl, bytes_compl);
+
+ if (unlikely(netif_queue_stopped(ndev)) && (count < (TX_DESC_NUM - 1)))
+ netif_wake_queue(ndev);
+
+ return count;
+}
+
+static void hip04_start_tx_timer(struct hip04_priv *priv)
+{
+ unsigned long ns = priv->tx_coalesce_usecs * NSEC_PER_USEC / 2;
+
+ /* allow timer to fire after half the time at the earliest */
+ hrtimer_start_range_ns(&priv->tx_coalesce_timer, ns_to_ktime(ns),
+ ns, HRTIMER_MODE_REL);
+}
+
+static int hip04_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ struct net_device_stats *stats = &ndev->stats;
+ unsigned int tx_head = priv->tx_head, count;
+ struct tx_desc *desc = &priv->tx_desc[tx_head];
+ dma_addr_t phys;
+
+ smp_rmb();
+ count = tx_count(tx_head, ACCESS_ONCE(priv->tx_tail));
+ if (count == (TX_DESC_NUM - 1)) {
+ netif_stop_queue(ndev);
+ return NETDEV_TX_BUSY;
+ }
+
+ phys = dma_map_single(&ndev->dev, skb->data, skb->len, DMA_TO_DEVICE);
+ if (dma_mapping_error(&ndev->dev, phys)) {
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ priv->tx_skb[tx_head] = skb;
+ priv->tx_phys[tx_head] = phys;
+ desc->send_addr = cpu_to_be32(phys);
+ desc->send_size = cpu_to_be32(skb->len);
+ desc->cfg = cpu_to_be32(TX_CLEAR_WB | TX_FINISH_CACHE_INV);
+ phys = priv->tx_desc_dma + tx_head * sizeof(struct tx_desc);
+ desc->wb_addr = cpu_to_be32(phys);
+ skb_tx_timestamp(skb);
+
+ hip04_set_xmit_desc(priv, phys);
+ priv->tx_head = TX_NEXT(tx_head);
+ count++;
+ netdev_sent_queue(ndev, skb->len);
+
+ stats->tx_bytes += skb->len;
+ stats->tx_packets++;
+
+ /* Ensure tx_head update visible to tx reclaim */
+ smp_wmb();
+
+ /* queue is getting full, better start cleaning up now */
+ if (count >= priv->tx_coalesce_frames) {
+ if (napi_schedule_prep(&priv->napi)) {
+ /* disable rx interrupt and timer */
+ priv->reg_inten &= ~(RCV_INT);
+ writel_relaxed(DEF_INT_MASK & ~RCV_INT,
+ priv->base + PPE_INTEN);
+ hrtimer_cancel(&priv->tx_coalesce_timer);
+ __napi_schedule(&priv->napi);
+ }
+ } else if (!hrtimer_is_queued(&priv->tx_coalesce_timer)) {
+ /* cleanup not pending yet, start a new timer */
+ hip04_start_tx_timer(priv);
+ }
+
+ return NETDEV_TX_OK;
+}
+
+static int hip04_rx_poll(struct napi_struct *napi, int budget)
+{
+ struct hip04_priv *priv = container_of(napi, struct hip04_priv, napi);
+ struct net_device *ndev = priv->ndev;
+ struct net_device_stats *stats = &ndev->stats;
+ unsigned int cnt = hip04_recv_cnt(priv);
+ struct rx_desc *desc;
+ struct sk_buff *skb;
+ unsigned char *buf;
+ bool last = false;
+ dma_addr_t phys;
+ int rx = 0;
+ int tx_remaining;
+ u16 len;
+ u32 err;
+
+ while (cnt && !last) {
+ buf = priv->rx_buf[priv->rx_head];
+ skb = build_skb(buf, priv->rx_buf_size);
+ if (unlikely(!skb))
+ net_dbg_ratelimited("build_skb failed\n");
+
+ dma_unmap_single(&ndev->dev, priv->rx_phys[priv->rx_head],
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+ priv->rx_phys[priv->rx_head] = 0;
+
+ desc = (struct rx_desc *)skb->data;
+ len = be16_to_cpu(desc->pkt_len);
+ err = be32_to_cpu(desc->pkt_err);
+
+ if (0 == len) {
+ dev_kfree_skb_any(skb);
+ last = true;
+ } else if ((err & RX_PKT_ERR) || (len >= GMAC_MAX_PKT_LEN)) {
+ dev_kfree_skb_any(skb);
+ stats->rx_dropped++;
+ stats->rx_errors++;
+ } else {
+ skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
+ skb_put(skb, len);
+ skb->protocol = eth_type_trans(skb, ndev);
+ napi_gro_receive(&priv->napi, skb);
+ stats->rx_packets++;
+ stats->rx_bytes += len;
+ rx++;
+ }
+
+ buf = netdev_alloc_frag(priv->rx_buf_size);
+ if (!buf)
+ goto done;
+ phys = dma_map_single(&ndev->dev, buf,
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+ if (dma_mapping_error(&ndev->dev, phys))
+ goto done;
+ priv->rx_buf[priv->rx_head] = buf;
+ priv->rx_phys[priv->rx_head] = phys;
+ hip04_set_recv_desc(priv, phys);
+
+ priv->rx_head = RX_NEXT(priv->rx_head);
+ if (rx >= budget)
+ goto done;
+
+ if (--cnt == 0)
+ cnt = hip04_recv_cnt(priv);
+ }
+
+ if (!(priv->reg_inten & RCV_INT)) {
+ /* enable rx interrupt */
+ priv->reg_inten |= RCV_INT;
+ writel_relaxed(priv->reg_inten, priv->base + PPE_INTEN);
+ }
+ napi_complete(napi);
+done:
+ /* clean up tx descriptors and start a new timer if necessary */
+ tx_remaining = hip04_tx_reclaim(ndev, false);
+ if (rx < budget && tx_remaining)
+ hip04_start_tx_timer(priv);
+
+ return rx;
+}
+
+static irqreturn_t hip04_mac_interrupt(int irq, void *dev_id)
+{
+ struct net_device *ndev = (struct net_device *)dev_id;
+ struct hip04_priv *priv = netdev_priv(ndev);
+ struct net_device_stats *stats = &ndev->stats;
+ u32 ists = readl_relaxed(priv->base + PPE_INTSTS);
+
+ if (!ists)
+ return IRQ_NONE;
+
+ writel_relaxed(DEF_INT_MASK, priv->base + PPE_RINT);
+
+ if (unlikely(ists & DEF_INT_ERR)) {
+ if (ists & (RCV_NOBUF | RCV_DROP)) {
+ stats->rx_errors++;
+ stats->rx_dropped++;
+ netdev_err(ndev, "rx drop\n");
+ }
+ if (ists & TX_DROP) {
+ stats->tx_dropped++;
+ netdev_err(ndev, "tx drop\n");
+ }
+ }
+
+ if (ists & RCV_INT && napi_schedule_prep(&priv->napi)) {
+ /* disable rx interrupt */
+ priv->reg_inten &= ~(RCV_INT);
+ writel_relaxed(DEF_INT_MASK & ~RCV_INT, priv->base + PPE_INTEN);
+ hrtimer_cancel(&priv->tx_coalesce_timer);
+ __napi_schedule(&priv->napi);
+ }
+
+ return IRQ_HANDLED;
+}
+
+enum hrtimer_restart tx_done(struct hrtimer *hrtimer)
+{
+ struct hip04_priv *priv;
+
+ priv = container_of(hrtimer, struct hip04_priv, tx_coalesce_timer);
+
+ if (napi_schedule_prep(&priv->napi)) {
+ /* disable rx interrupt */
+ priv->reg_inten &= ~(RCV_INT);
+ writel_relaxed(DEF_INT_MASK & ~RCV_INT, priv->base + PPE_INTEN);
+ __napi_schedule(&priv->napi);
+ }
+
+ return HRTIMER_NORESTART;
+}
+
+static void hip04_adjust_link(struct net_device *ndev)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ struct phy_device *phy = priv->phy;
+
+ if ((priv->speed != phy->speed) || (priv->duplex != phy->duplex)) {
+ hip04_config_port(ndev, phy->speed, phy->duplex);
+ phy_print_status(phy);
+ }
+}
+
+static int hip04_mac_open(struct net_device *ndev)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ int i;
+
+ priv->rx_head = 0;
+ priv->tx_head = 0;
+ priv->tx_tail = 0;
+ hip04_reset_ppe(priv);
+
+ for (i = 0; i < RX_DESC_NUM; i++) {
+ dma_addr_t phys;
+
+ phys = dma_map_single(&ndev->dev, priv->rx_buf[i],
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+ if (dma_mapping_error(&ndev->dev, phys))
+ return -EIO;
+
+ priv->rx_phys[i] = phys;
+ hip04_set_recv_desc(priv, phys);
+ }
+
+ if (priv->phy)
+ phy_start(priv->phy);
+
+ netdev_reset_queue(ndev);
+ netif_start_queue(ndev);
+ hip04_mac_enable(ndev);
+ napi_enable(&priv->napi);
+
+ return 0;
+}
+
+static int hip04_mac_stop(struct net_device *ndev)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ int i;
+
+ napi_disable(&priv->napi);
+ netif_stop_queue(ndev);
+ hip04_mac_disable(ndev);
+ hip04_tx_reclaim(ndev, true);
+ hip04_reset_ppe(priv);
+
+ if (priv->phy)
+ phy_stop(priv->phy);
+
+ for (i = 0; i < RX_DESC_NUM; i++) {
+ if (priv->rx_phys[i]) {
+ dma_unmap_single(&ndev->dev, priv->rx_phys[i],
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+ priv->rx_phys[i] = 0;
+ }
+ }
+
+ return 0;
+}
+
+static void hip04_timeout(struct net_device *ndev)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+
+ schedule_work(&priv->tx_timeout_task);
+}
+
+static void hip04_tx_timeout_task(struct work_struct *work)
+{
+ struct hip04_priv *priv;
+
+ priv = container_of(work, struct hip04_priv, tx_timeout_task);
+ hip04_mac_stop(priv->ndev);
+ hip04_mac_open(priv->ndev);
+}
+
+static struct net_device_stats *hip04_get_stats(struct net_device *ndev)
+{
+ return &ndev->stats;
+}
+
+static int hip04_get_coalesce(struct net_device *netdev,
+ struct ethtool_coalesce *ec)
+{
+ struct hip04_priv *priv = netdev_priv(netdev);
+
+ ec->tx_coalesce_usecs = priv->tx_coalesce_usecs;
+ ec->tx_max_coalesced_frames = priv->tx_coalesce_frames;
+
+ return 0;
+}
+
+static int hip04_set_coalesce(struct net_device *netdev,
+ struct ethtool_coalesce *ec)
+{
+ struct hip04_priv *priv = netdev_priv(netdev);
+
+ /* Check not supported parameters */
+ if ((ec->rx_max_coalesced_frames) || (ec->rx_coalesce_usecs_irq) ||
+ (ec->rx_max_coalesced_frames_irq) || (ec->tx_coalesce_usecs_irq) ||
+ (ec->use_adaptive_rx_coalesce) || (ec->use_adaptive_tx_coalesce) ||
+ (ec->pkt_rate_low) || (ec->rx_coalesce_usecs_low) ||
+ (ec->rx_max_coalesced_frames_low) || (ec->tx_coalesce_usecs_high) ||
+ (ec->tx_max_coalesced_frames_low) || (ec->pkt_rate_high) ||
+ (ec->tx_coalesce_usecs_low) || (ec->rx_coalesce_usecs_high) ||
+ (ec->rx_max_coalesced_frames_high) || (ec->rx_coalesce_usecs) ||
+ (ec->tx_max_coalesced_frames_irq) ||
+ (ec->stats_block_coalesce_usecs) ||
+ (ec->tx_max_coalesced_frames_high) || (ec->rate_sample_interval))
+ return -EOPNOTSUPP;
+
+ if ((ec->tx_coalesce_usecs > HIP04_MAX_TX_COALESCE_USECS ||
+ ec->tx_coalesce_usecs < HIP04_MIN_TX_COALESCE_USECS) ||
+ (ec->tx_max_coalesced_frames > HIP04_MAX_TX_COALESCE_FRAMES ||
+ ec->tx_max_coalesced_frames < HIP04_MIN_TX_COALESCE_FRAMES))
+ return -EINVAL;
+
+ priv->tx_coalesce_usecs = ec->tx_coalesce_usecs;
+ priv->tx_coalesce_frames = ec->tx_max_coalesced_frames;
+
+ return 0;
+}
+
+static void hip04_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
+ strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
+}
+
+static struct ethtool_ops hip04_ethtool_ops = {
+ .get_coalesce = hip04_get_coalesce,
+ .set_coalesce = hip04_set_coalesce,
+ .get_drvinfo = hip04_get_drvinfo,
+};
+
+static struct net_device_ops hip04_netdev_ops = {
+ .ndo_open = hip04_mac_open,
+ .ndo_stop = hip04_mac_stop,
+ .ndo_get_stats = hip04_get_stats,
+ .ndo_start_xmit = hip04_mac_start_xmit,
+ .ndo_set_mac_address = hip04_set_mac_address,
+ .ndo_tx_timeout = hip04_timeout,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = eth_change_mtu,
+};
+
+static int hip04_alloc_ring(struct net_device *ndev, struct device *d)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ int i;
+
+ priv->tx_desc = dma_alloc_coherent(d,
+ TX_DESC_NUM * sizeof(struct tx_desc),
+ &priv->tx_desc_dma, GFP_KERNEL);
+ if (!priv->tx_desc)
+ return -ENOMEM;
+
+ priv->rx_buf_size = RX_BUF_SIZE +
+ SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+ for (i = 0; i < RX_DESC_NUM; i++) {
+ priv->rx_buf[i] = netdev_alloc_frag(priv->rx_buf_size);
+ if (!priv->rx_buf[i])
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void hip04_free_ring(struct net_device *ndev, struct device *d)
+{
+ struct hip04_priv *priv = netdev_priv(ndev);
+ int i;
+
+ for (i = 0; i < RX_DESC_NUM; i++)
+ if (priv->rx_buf[i])
+ put_page(virt_to_head_page(priv->rx_buf[i]));
+
+ for (i = 0; i < TX_DESC_NUM; i++)
+ if (priv->tx_skb[i])
+ dev_kfree_skb_any(priv->tx_skb[i]);
+
+ dma_free_coherent(d, TX_DESC_NUM * sizeof(struct tx_desc),
+ priv->tx_desc, priv->tx_desc_dma);
+}
+
+static int hip04_mac_probe(struct platform_device *pdev)
+{
+ struct device *d = &pdev->dev;
+ struct device_node *node = d->of_node;
+ struct of_phandle_args arg;
+ struct net_device *ndev;
+ struct hip04_priv *priv;
+ struct resource *res;
+ unsigned int irq;
+ int ret;
+
+ ndev = alloc_etherdev(sizeof(struct hip04_priv));
+ if (!ndev)
+ return -ENOMEM;
+
+ priv = netdev_priv(ndev);
+ priv->ndev = ndev;
+ platform_set_drvdata(pdev, ndev);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap_resource(d, res);
+ if (IS_ERR(priv->base)) {
+ ret = PTR_ERR(priv->base);
+ goto init_fail;
+ }
+
+ ret = of_parse_phandle_with_fixed_args(node, "port-handle", 2, 0, &arg);
+ if (ret < 0) {
+ dev_warn(d, "no port-handle\n");
+ goto init_fail;
+ }
+
+ priv->port = arg.args[0];
+ priv->chan = arg.args[1] * RX_DESC_NUM;
+
+ hrtimer_init(&priv->tx_coalesce_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+
+ /* BQL will try to keep the TX queue as short as possible, but it can't
+ * be faster than tx_coalesce_usecs, so we need a fast timeout here,
+ * but also long enough to gather up enough frames to ensure we don't
+ * get more interrupts than necessary.
+ * 200us is enough for 16 frames of 1500 bytes at gigabit ethernet rate
+ */
+ priv->tx_coalesce_frames = TX_DESC_NUM * 3 / 4;
+ priv->tx_coalesce_usecs = 200;
+ priv->tx_coalesce_timer.function = tx_done;
+
+ priv->map = syscon_node_to_regmap(arg.np);
+ if (IS_ERR(priv->map)) {
+ dev_warn(d, "no syscon hisilicon,hip04-ppe\n");
+ ret = PTR_ERR(priv->map);
+ goto init_fail;
+ }
+
+ priv->phy_mode = of_get_phy_mode(node);
+ if (priv->phy_mode < 0) {
+ dev_warn(d, "not find phy-mode\n");
+ ret = -EINVAL;
+ goto init_fail;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ ret = -EINVAL;
+ goto init_fail;
+ }
+
+ ret = devm_request_irq(d, irq, hip04_mac_interrupt,
+ 0, pdev->name, ndev);
+ if (ret) {
+ netdev_err(ndev, "devm_request_irq failed\n");
+ goto init_fail;
+ }
+
+ priv->phy_node = of_parse_phandle(node, "phy-handle", 0);
+ if (priv->phy_node) {
+ priv->phy = of_phy_connect(ndev, priv->phy_node,
+ &hip04_adjust_link,
+ 0, priv->phy_mode);
+ if (!priv->phy) {
+ ret = -EPROBE_DEFER;
+ goto init_fail;
+ }
+ }
+
+ INIT_WORK(&priv->tx_timeout_task, hip04_tx_timeout_task);
+
+ ether_setup(ndev);
+ ndev->netdev_ops = &hip04_netdev_ops;
+ ndev->ethtool_ops = &hip04_ethtool_ops;
+ ndev->watchdog_timeo = TX_TIMEOUT;
+ ndev->priv_flags |= IFF_UNICAST_FLT;
+ ndev->irq = irq;
+ netif_napi_add(ndev, &priv->napi, hip04_rx_poll, NAPI_POLL_WEIGHT);
+ SET_NETDEV_DEV(ndev, &pdev->dev);
+
+ hip04_reset_ppe(priv);
+ if (priv->phy_mode == PHY_INTERFACE_MODE_MII)
+ hip04_config_port(ndev, SPEED_100, DUPLEX_FULL);
+
+ hip04_config_fifo(priv);
+ random_ether_addr(ndev->dev_addr);
+ hip04_update_mac_address(ndev);
+
+ ret = hip04_alloc_ring(ndev, d);
+ if (ret) {
+ netdev_err(ndev, "alloc ring fail\n");
+ goto alloc_fail;
+ }
+
+ ret = register_netdev(ndev);
+ if (ret) {
+ free_netdev(ndev);
+ goto alloc_fail;
+ }
+
+ return 0;
+
+alloc_fail:
+ hip04_free_ring(ndev, d);
+init_fail:
+ of_node_put(priv->phy_node);
+ free_netdev(ndev);
+ return ret;
+}
+
+static int hip04_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct hip04_priv *priv = netdev_priv(ndev);
+ struct device *d = &pdev->dev;
+
+ if (priv->phy)
+ phy_disconnect(priv->phy);
+
+ hip04_free_ring(ndev, d);
+ unregister_netdev(ndev);
+ free_irq(ndev->irq, ndev);
+ of_node_put(priv->phy_node);
+ cancel_work_sync(&priv->tx_timeout_task);
+ free_netdev(ndev);
+
+ return 0;
+}
+
+static const struct of_device_id hip04_mac_match[] = {
+ { .compatible = "hisilicon,hip04-mac" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, hip04_mac_match);
+
+static struct platform_driver hip04_mac_driver = {
+ .probe = hip04_mac_probe,
+ .remove = hip04_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = hip04_mac_match,
+ },
+};
+module_platform_driver(hip04_mac_driver);
+
+MODULE_DESCRIPTION("HISILICON P04 Ethernet driver");
+MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/net/ethernet/hisilicon/hip04_mdio.c b/kernel/drivers/net/ethernet/hisilicon/hip04_mdio.c
new file mode 100644
index 000000000..b3bac25db
--- /dev/null
+++ b/kernel/drivers/net/ethernet/hisilicon/hip04_mdio.c
@@ -0,0 +1,186 @@
+/* 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/platform_device.h>
+#include <linux/io.h>
+#include <linux/of_mdio.h>
+#include <linux/delay.h>
+
+#define MDIO_CMD_REG 0x0
+#define MDIO_ADDR_REG 0x4
+#define MDIO_WDATA_REG 0x8
+#define MDIO_RDATA_REG 0xc
+#define MDIO_STA_REG 0x10
+
+#define MDIO_START BIT(14)
+#define MDIO_R_VALID BIT(1)
+#define MDIO_READ (BIT(12) | BIT(11) | MDIO_START)
+#define MDIO_WRITE (BIT(12) | BIT(10) | MDIO_START)
+
+struct hip04_mdio_priv {
+ void __iomem *base;
+};
+
+#define WAIT_TIMEOUT 10
+static int hip04_mdio_wait_ready(struct mii_bus *bus)
+{
+ struct hip04_mdio_priv *priv = bus->priv;
+ int i;
+
+ for (i = 0; readl_relaxed(priv->base + MDIO_CMD_REG) & MDIO_START; i++) {
+ if (i == WAIT_TIMEOUT)
+ return -ETIMEDOUT;
+ msleep(20);
+ }
+
+ return 0;
+}
+
+static int hip04_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+{
+ struct hip04_mdio_priv *priv = bus->priv;
+ u32 val;
+ int ret;
+
+ ret = hip04_mdio_wait_ready(bus);
+ if (ret < 0)
+ goto out;
+
+ val = regnum | (mii_id << 5) | MDIO_READ;
+ writel_relaxed(val, priv->base + MDIO_CMD_REG);
+
+ ret = hip04_mdio_wait_ready(bus);
+ if (ret < 0)
+ goto out;
+
+ val = readl_relaxed(priv->base + MDIO_STA_REG);
+ 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_RDATA_REG);
+ ret = val & 0xFFFF;
+out:
+ return ret;
+}
+
+static int hip04_mdio_write(struct mii_bus *bus, int mii_id,
+ int regnum, u16 value)
+{
+ struct hip04_mdio_priv *priv = bus->priv;
+ u32 val;
+ int ret;
+
+ ret = hip04_mdio_wait_ready(bus);
+ if (ret < 0)
+ goto out;
+
+ writel_relaxed(value, priv->base + MDIO_WDATA_REG);
+ val = regnum | (mii_id << 5) | MDIO_WRITE;
+ writel_relaxed(val, priv->base + MDIO_CMD_REG);
+out:
+ return ret;
+}
+
+static int hip04_mdio_reset(struct mii_bus *bus)
+{
+ int temp, i;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ hip04_mdio_write(bus, i, 22, 0);
+ temp = hip04_mdio_read(bus, i, MII_BMCR);
+ if (temp < 0)
+ continue;
+
+ temp |= BMCR_RESET;
+ if (hip04_mdio_write(bus, i, MII_BMCR, temp) < 0)
+ continue;
+ }
+
+ mdelay(500);
+ return 0;
+}
+
+static int hip04_mdio_probe(struct platform_device *pdev)
+{
+ struct resource *r;
+ struct mii_bus *bus;
+ struct hip04_mdio_priv *priv;
+ int ret;
+
+ bus = mdiobus_alloc_size(sizeof(struct hip04_mdio_priv));
+ if (!bus) {
+ dev_err(&pdev->dev, "Cannot allocate MDIO bus\n");
+ return -ENOMEM;
+ }
+
+ bus->name = "hip04_mdio_bus";
+ bus->read = hip04_mdio_read;
+ bus->write = hip04_mdio_write;
+ bus->reset = hip04_mdio_reset;
+ snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev));
+ bus->parent = &pdev->dev;
+ priv = bus->priv;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(priv->base)) {
+ ret = PTR_ERR(priv->base);
+ goto out_mdio;
+ }
+
+ ret = of_mdiobus_register(bus, pdev->dev.of_node);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Cannot register MDIO bus (%d)\n", ret);
+ goto out_mdio;
+ }
+
+ platform_set_drvdata(pdev, bus);
+
+ return 0;
+
+out_mdio:
+ mdiobus_free(bus);
+ return ret;
+}
+
+static int hip04_mdio_remove(struct platform_device *pdev)
+{
+ struct mii_bus *bus = platform_get_drvdata(pdev);
+
+ mdiobus_unregister(bus);
+ mdiobus_free(bus);
+
+ return 0;
+}
+
+static const struct of_device_id hip04_mdio_match[] = {
+ { .compatible = "hisilicon,hip04-mdio" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, hip04_mdio_match);
+
+static struct platform_driver hip04_mdio_driver = {
+ .probe = hip04_mdio_probe,
+ .remove = hip04_mdio_remove,
+ .driver = {
+ .name = "hip04-mdio",
+ .owner = THIS_MODULE,
+ .of_match_table = hip04_mdio_match,
+ },
+};
+
+module_platform_driver(hip04_mdio_driver);
+
+MODULE_DESCRIPTION("HISILICON P04 MDIO interface driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:hip04-mdio");
diff --git a/kernel/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c b/kernel/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
new file mode 100644
index 000000000..0ffdcd381
--- /dev/null
+++ b/kernel/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
@@ -0,0 +1,1066 @@
+/* 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");