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openwrt-xburst/target/linux/cns3xxx/patches-3.3/051-cns3xxx_gigabit.patch
juhosg 71f3abe21d cns3xxx: add support for 3.3 
Compile tested only.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31809 3c298f89-4303-0410-b956-a3cf2f4a3e73
2012-05-18 20:10:53 +00:00

1358 lines
32 KiB
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--- /dev/null
+++ b/drivers/net/ethernet/cavium/cns3xxx_eth.c
@@ -0,0 +1,1270 @@
+/*
+ * Cavium CNS3xxx Gigabit driver for Linux
+ *
+ * Copyright 2011 Gateworks Corporation
+ * Chris Lang <clang@gateworks.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/skbuff.h>
+#include <mach/irqs.h>
+#include <mach/platform.h>
+
+#define DRV_NAME "cns3xxx_eth"
+
+#define RX_DESCS 512
+#define TX_DESCS 512
+#define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
+
+#define RX_POOL_ALLOC_SIZE (sizeof(struct rx_desc) * RX_DESCS)
+#define TX_POOL_ALLOC_SIZE (sizeof(struct tx_desc) * TX_DESCS)
+#define REGS_SIZE 336
+#define MAX_MRU 9500
+
+#define NAPI_WEIGHT 64
+
+/* MDIO Defines */
+#define MDIO_CMD_COMPLETE 0x00008000
+#define MDIO_WRITE_COMMAND 0x00002000
+#define MDIO_READ_COMMAND 0x00004000
+#define MDIO_REG_OFFSET 8
+#define MDIO_VALUE_OFFSET 16
+
+/* Descritor Defines */
+#define END_OF_RING 0x40000000
+#define FIRST_SEGMENT 0x20000000
+#define LAST_SEGMENT 0x10000000
+#define FORCE_ROUTE 0x04000000
+#define IP_CHECKSUM 0x00040000
+#define UDP_CHECKSUM 0x00020000
+#define TCP_CHECKSUM 0x00010000
+
+/* Port Config Defines */
+#define PORT_DISABLE 0x00040000
+#define PROMISC_OFFSET 29
+
+/* Global Config Defines */
+#define UNKNOWN_VLAN_TO_CPU 0x02000000
+#define ACCEPT_CRC_PACKET 0x00200000
+#define CRC_STRIPPING 0x00100000
+
+/* VLAN Config Defines */
+#define NIC_MODE 0x00008000
+#define VLAN_UNAWARE 0x00000001
+
+/* DMA AUTO Poll Defines */
+#define TS_POLL_EN 0x00000020
+#define TS_SUSPEND 0x00000010
+#define FS_POLL_EN 0x00000002
+#define FS_SUSPEND 0x00000001
+
+/* DMA Ring Control Defines */
+#define QUEUE_THRESHOLD 0x000000f0
+#define CLR_FS_STATE 0x80000000
+
+struct tx_desc
+{
+ u32 sdp; /* segment data pointer */
+
+ union {
+ struct {
+ u32 sdl:16; /* segment data length */
+ u32 tco:1;
+ u32 uco:1;
+ u32 ico:1;
+ u32 rsv_1:3; /* reserve */
+ u32 pri:3;
+ u32 fp:1; /* force priority */
+ u32 fr:1;
+ u32 interrupt:1;
+ u32 lsd:1;
+ u32 fsd:1;
+ u32 eor:1;
+ u32 cown:1;
+ };
+ u32 config0;
+ };
+
+ union {
+ struct {
+ u32 ctv:1;
+ u32 stv:1;
+ u32 sid:4;
+ u32 inss:1;
+ u32 dels:1;
+ u32 rsv_2:9;
+ u32 pmap:5;
+ u32 mark:3;
+ u32 ewan:1;
+ u32 fewan:1;
+ u32 rsv_3:5;
+ };
+ u32 config1;
+ };
+
+ union {
+ struct {
+ u32 c_vid:12;
+ u32 c_cfs:1;
+ u32 c_pri:3;
+ u32 s_vid:12;
+ u32 s_dei:1;
+ u32 s_pri:3;
+ };
+ u32 config2;
+ };
+
+ u8 alignment[16]; /* for 32 byte */
+};
+
+struct rx_desc
+{
+ u32 sdp; /* segment data pointer */
+
+ union {
+ struct {
+ u32 sdl:16; /* segment data length */
+ u32 l4f:1;
+ u32 ipf:1;
+ u32 prot:4;
+ u32 hr:6;
+ u32 lsd:1;
+ u32 fsd:1;
+ u32 eor:1;
+ u32 cown:1;
+ };
+ u32 config0;
+ };
+
+ union {
+ struct {
+ u32 ctv:1;
+ u32 stv:1;
+ u32 unv:1;
+ u32 iwan:1;
+ u32 exdv:1;
+ u32 e_wan:1;
+ u32 rsv_1:2;
+ u32 sp:3;
+ u32 crc_err:1;
+ u32 un_eth:1;
+ u32 tc:2;
+ u32 rsv_2:1;
+ u32 ip_offset:5;
+ u32 rsv_3:11;
+ };
+ u32 config1;
+ };
+
+ union {
+ struct {
+ u32 c_vid:12;
+ u32 c_cfs:1;
+ u32 c_pri:3;
+ u32 s_vid:12;
+ u32 s_dei:1;
+ u32 s_pri:3;
+ };
+ u32 config2;
+ };
+
+ u8 alignment[16]; /* for 32 byte alignment */
+};
+
+struct switch_regs {
+ u32 phy_control;
+ u32 phy_auto_addr;
+ u32 mac_glob_cfg;
+ u32 mac_cfg[4];
+ u32 mac_pri_ctrl[5], __res;
+ u32 etype[2];
+ u32 udp_range[4];
+ u32 prio_etype_udp;
+ u32 prio_ipdscp[8];
+ u32 tc_ctrl;
+ u32 rate_ctrl;
+ u32 fc_glob_thrs;
+ u32 fc_port_thrs;
+ u32 mc_fc_glob_thrs;
+ u32 dc_glob_thrs;
+ u32 arl_vlan_cmd;
+ u32 arl_ctrl[3];
+ u32 vlan_cfg;
+ u32 pvid[2];
+ u32 vlan_ctrl[3];
+ u32 session_id[8];
+ u32 intr_stat;
+ u32 intr_mask;
+ u32 sram_test;
+ u32 mem_queue;
+ u32 farl_ctrl;
+ u32 fc_input_thrs, __res1[2];
+ u32 clk_skew_ctrl;
+ u32 mac_glob_cfg_ext, __res2[2];
+ u32 dma_ring_ctrl;
+ u32 dma_auto_poll_cfg;
+ u32 delay_intr_cfg, __res3;
+ u32 ts_dma_ctrl0;
+ u32 ts_desc_ptr0;
+ u32 ts_desc_base_addr0, __res4;
+ u32 fs_dma_ctrl0;
+ u32 fs_desc_ptr0;
+ u32 fs_desc_base_addr0, __res5;
+ u32 ts_dma_ctrl1;
+ u32 ts_desc_ptr1;
+ u32 ts_desc_base_addr1, __res6;
+ u32 fs_dma_ctrl1;
+ u32 fs_desc_ptr1;
+ u32 fs_desc_base_addr1;
+};
+
+struct _tx_ring {
+ struct tx_desc *desc;
+ dma_addr_t phys_addr;
+ struct tx_desc *cur_addr;
+ struct sk_buff *buff_tab[TX_DESCS];
+ u32 free_index;
+ u32 count_index;
+ u32 cur_index;
+ int num_used;
+ int num_count;
+};
+
+struct _rx_ring {
+ struct rx_desc *desc;
+ dma_addr_t phys_addr;
+ struct rx_desc *cur_addr;
+ struct sk_buff *buff_tab[RX_DESCS];
+ u32 cur_index;
+ u32 alloc_index;
+ int alloc_count;
+};
+
+struct sw {
+ struct resource *mem_res;
+ struct switch_regs __iomem *regs;
+ struct napi_struct napi;
+ struct cns3xxx_plat_info *plat;
+ struct _tx_ring *tx_ring;
+ struct _rx_ring *rx_ring;
+ u32 mtu;
+};
+
+struct port {
+ struct net_device *netdev;
+ struct phy_device *phydev;
+ struct sw *sw;
+ int id; /* logical port ID */
+ int speed, duplex;
+ u32 mtu;
+};
+
+static spinlock_t mdio_lock;
+static spinlock_t tx_lock;
+static spinlock_t stat_lock;
+static struct switch_regs __iomem *mdio_regs; /* mdio command and status only */
+struct mii_bus *mdio_bus;
+static int ports_open;
+static struct port *switch_port_tab[3];
+static struct dma_pool *rx_dma_pool;
+static struct dma_pool *tx_dma_pool;
+struct net_device *napi_dev;
+
+static int cns3xxx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
+ int write, u16 cmd)
+{
+ int cycles = 0;
+ u32 temp = 0;
+
+ temp = __raw_readl(&mdio_regs->phy_control);
+ temp |= MDIO_CMD_COMPLETE;
+ __raw_writel(temp, &mdio_regs->phy_control);
+ udelay(10);
+
+ if (write) {
+ temp = (cmd << MDIO_VALUE_OFFSET);
+ temp |= MDIO_WRITE_COMMAND;
+ } else {
+ temp = MDIO_READ_COMMAND;
+ }
+ temp |= ((location & 0x1f) << MDIO_REG_OFFSET);
+ temp |= (phy_id & 0x1f);
+
+ __raw_writel(temp, &mdio_regs->phy_control);
+
+ while (((__raw_readl(&mdio_regs->phy_control) & MDIO_CMD_COMPLETE) == 0)
+ && cycles < 5000) {
+ udelay(1);
+ cycles++;
+ }
+
+ if (cycles == 5000) {
+ printk(KERN_ERR "%s #%i: MII transaction failed\n", bus->name,
+ phy_id);
+ return -1;
+ }
+
+ temp = __raw_readl(&mdio_regs->phy_control);
+ temp |= MDIO_CMD_COMPLETE;
+ __raw_writel(temp, &mdio_regs->phy_control);
+
+ if (write)
+ return 0;
+
+ return ((temp >> MDIO_VALUE_OFFSET) & 0xFFFF);
+}
+
+static int cns3xxx_mdio_read(struct mii_bus *bus, int phy_id, int location)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&mdio_lock, flags);
+ ret = cns3xxx_mdio_cmd(bus, phy_id, location, 0, 0);
+ spin_unlock_irqrestore(&mdio_lock, flags);
+ return ret;
+}
+
+static int cns3xxx_mdio_write(struct mii_bus *bus, int phy_id, int location,
+ u16 val)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&mdio_lock, flags);
+ ret = cns3xxx_mdio_cmd(bus, phy_id, location, 1, val);
+ spin_unlock_irqrestore(&mdio_lock, flags);
+ return ret;
+}
+
+static int cns3xxx_mdio_register(void)
+{
+ int err;
+
+ if (!(mdio_bus = mdiobus_alloc()))
+ return -ENOMEM;
+
+ mdio_regs = (struct switch_regs __iomem *)CNS3XXX_SWITCH_BASE_VIRT;
+
+ spin_lock_init(&mdio_lock);
+ mdio_bus->name = "CNS3xxx MII Bus";
+ mdio_bus->read = &cns3xxx_mdio_read;
+ mdio_bus->write = &cns3xxx_mdio_write;
+ strcpy(mdio_bus->id, "0");
+
+ if ((err = mdiobus_register(mdio_bus)))
+ mdiobus_free(mdio_bus);
+ return err;
+}
+
+static void cns3xxx_mdio_remove(void)
+{
+ mdiobus_unregister(mdio_bus);
+ mdiobus_free(mdio_bus);
+}
+
+static void cns3xxx_adjust_link(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ struct phy_device *phydev = port->phydev;
+
+ if (!phydev->link) {
+ if (port->speed) {
+ port->speed = 0;
+ printk(KERN_INFO "%s: link down\n", dev->name);
+ }
+ return;
+ }
+
+ if (port->speed == phydev->speed && port->duplex == phydev->duplex)
+ return;
+
+ port->speed = phydev->speed;
+ port->duplex = phydev->duplex;
+
+ printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
+ dev->name, port->speed, port->duplex ? "full" : "half");
+}
+
+irqreturn_t eth_rx_irq(int irq, void *pdev)
+{
+ struct net_device *dev = pdev;
+ struct sw *sw = netdev_priv(dev);
+ if (likely(napi_schedule_prep(&sw->napi))) {
+ disable_irq_nosync(IRQ_CNS3XXX_SW_R0RXC);
+ __napi_schedule(&sw->napi);
+ }
+ return (IRQ_HANDLED);
+}
+
+static void cns3xxx_alloc_rx_buf(struct sw *sw, int received)
+{
+ struct _rx_ring *rx_ring = sw->rx_ring;
+ unsigned int i = rx_ring->alloc_index;
+ struct rx_desc *desc;
+ struct sk_buff *skb;
+ u32 mtu = sw->mtu;
+
+ rx_ring->alloc_count += received;
+
+ for (received = rx_ring->alloc_count; received > 0; received--) {
+ desc = &(rx_ring)->desc[i];
+
+ if ((skb = dev_alloc_skb(mtu))) {
+ if (SKB_DMA_REALIGN)
+ skb_reserve(skb, SKB_DMA_REALIGN);
+ skb_reserve(skb, NET_IP_ALIGN);
+ desc->sdp = dma_map_single(NULL, skb->data,
+ mtu, DMA_FROM_DEVICE);
+ if (dma_mapping_error(NULL, desc->sdp)) {
+ dev_kfree_skb(skb);
+ /* Failed to map, better luck next time */
+ goto out;;
+ }
+ } else {
+ /* Failed to allocate skb, try again next time */
+ goto out;
+ }
+
+ /* put the new buffer on RX-free queue */
+ rx_ring->buff_tab[i] = skb;
+
+ if (++i == RX_DESCS) {
+ i = 0;
+ desc->config0 = END_OF_RING | FIRST_SEGMENT |
+ LAST_SEGMENT | mtu;
+ } else {
+ desc->config0 = FIRST_SEGMENT | LAST_SEGMENT | mtu;
+ }
+ }
+out:
+ rx_ring->alloc_count = received;
+ rx_ring->alloc_index = i;
+}
+
+static void update_tx_stats(struct sw *sw)
+{
+ struct _tx_ring *tx_ring = sw->tx_ring;
+ struct tx_desc *desc;
+ struct tx_desc *next_desc;
+ struct sk_buff *skb;
+ int i;
+ int index;
+ int num_count;
+
+ spin_lock_bh(&stat_lock);
+
+ num_count = tx_ring->num_count;
+
+ if (!num_count) {
+ spin_unlock_bh(&stat_lock);
+ return;
+ }
+
+ index = tx_ring->count_index;
+ desc = &(tx_ring)->desc[index];
+ for (i = 0; i < num_count; i++) {
+ skb = tx_ring->buff_tab[index];
+ if (desc->cown) {
+ tx_ring->buff_tab[index] = 0;
+ if (unlikely(++index == TX_DESCS)) index = 0;
+ next_desc = &(tx_ring)->desc[index];
+ prefetch(next_desc + 4);
+ if (likely(skb)) {
+ skb->dev->stats.tx_packets++;
+ skb->dev->stats.tx_bytes += skb->len;
+ dev_kfree_skb_any(skb);
+ }
+ desc = next_desc;
+ } else {
+ break;
+ }
+ }
+ tx_ring->num_count -= i;
+ tx_ring->count_index = index;
+
+ spin_unlock_bh(&stat_lock);
+}
+
+static void clear_tx_desc(struct sw *sw)
+{
+ struct _tx_ring *tx_ring = sw->tx_ring;
+ struct tx_desc *desc;
+ struct tx_desc *next_desc;
+ int i;
+ int index;
+ int num_used = tx_ring->num_used - tx_ring->num_count;
+
+ if (num_used < (TX_DESCS >> 1))
+ return;
+
+ index = tx_ring->free_index;
+ desc = &(tx_ring)->desc[index];
+ for (i = 0; i < num_used; i++) {
+ if (desc->cown) {
+ if (unlikely(++index == TX_DESCS)) index = 0;
+ next_desc = &(tx_ring)->desc[index];
+ prefetch(next_desc);
+ prefetch(next_desc + 4);
+ if (likely(desc->sdp))
+ dma_unmap_single(NULL, desc->sdp,
+ desc->sdl, DMA_TO_DEVICE);
+ desc = next_desc;
+ } else {
+ break;
+ }
+ }
+ tx_ring->free_index = index;
+ tx_ring->num_used -= i;
+}
+
+static int eth_poll(struct napi_struct *napi, int budget)
+{
+ struct sw *sw = container_of(napi, struct sw, napi);
+ struct net_device *dev;
+ struct _rx_ring *rx_ring = sw->rx_ring;
+ int received = 0;
+ unsigned int length;
+ unsigned int i = rx_ring->cur_index;
+ struct rx_desc *next_desc;
+ struct rx_desc *desc = &(rx_ring)->desc[i];
+ int port_id;
+
+ while (desc->cown) {
+ struct sk_buff *skb;
+
+ if (received >= budget)
+ break;
+
+ skb = rx_ring->buff_tab[i];
+
+ if (++i == RX_DESCS) i = 0;
+ next_desc = &(rx_ring)->desc[i];
+ prefetch(next_desc);
+
+ port_id = desc->sp;
+ if (port_id == 4)
+ dev = switch_port_tab[2]->netdev;
+ else
+ dev = switch_port_tab[port_id]->netdev;
+
+ length = desc->sdl;
+ /* process received frame */
+ dma_unmap_single(&dev->dev, desc->sdp,
+ length, DMA_FROM_DEVICE);
+
+ skb_put(skb, length);
+
+ skb->dev = dev;
+ skb->protocol = eth_type_trans(skb, dev);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += length;
+
+ switch (desc->prot) {
+ case 1:
+ case 2:
+ case 5:
+ case 6:
+ case 13:
+ case 14:
+ if (desc->l4f)
+ skb->ip_summed = CHECKSUM_NONE;
+ else
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ break;
+ default:
+ skb->ip_summed = CHECKSUM_NONE;
+ break;
+ }
+
+ napi_gro_receive(napi, skb);
+
+ received++;
+ desc = next_desc;
+ }
+
+ cns3xxx_alloc_rx_buf(sw, received);
+ rx_ring->cur_index = i;
+
+ if (received != budget) {
+ napi_complete(napi);
+ enable_irq(IRQ_CNS3XXX_SW_R0RXC);
+ }
+
+ return received;
+}
+
+static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ struct sw *sw = port->sw;
+ struct _tx_ring *tx_ring = sw->tx_ring;
+ struct tx_desc *tx_desc;
+ int index;
+ int len = skb->len;
+ char pmap = (1 << port->id);
+
+ if (pmap == 8)
+ pmap = (1 << 4);
+
+ if (unlikely(len > sw->mtu)) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ update_tx_stats(sw);
+
+ spin_lock_bh(&tx_lock);
+
+ clear_tx_desc(sw);
+
+ if (unlikely(tx_ring->num_used == TX_DESCS)) {
+ spin_unlock_bh(&tx_lock);
+ return NETDEV_TX_BUSY;
+ }
+
+ index = tx_ring->cur_index;
+
+ if (unlikely(++tx_ring->cur_index == TX_DESCS))
+ tx_ring->cur_index = 0;
+
+ tx_ring->num_used++;
+ tx_ring->num_count++;
+
+ spin_unlock_bh(&tx_lock);
+
+ tx_desc = &(tx_ring)->desc[index];
+
+ tx_desc->sdp = dma_map_single(NULL, skb->data, len,
+ DMA_TO_DEVICE);
+
+ if (dma_mapping_error(NULL, tx_desc->sdp)) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ tx_desc->pmap = pmap;
+ tx_ring->buff_tab[index] = skb;
+
+ if (index == TX_DESCS - 1) {
+ tx_desc->config0 = END_OF_RING | FIRST_SEGMENT | LAST_SEGMENT |
+ FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
+ TCP_CHECKSUM | len;
+ } else {
+ tx_desc->config0 = FIRST_SEGMENT | LAST_SEGMENT |
+ FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
+ TCP_CHECKSUM | len;
+ }
+
+ return NETDEV_TX_OK;
+}
+
+static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+ struct port *port = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return -EINVAL;
+ return phy_mii_ioctl(port->phydev, req, cmd);
+}
+
+/* ethtool support */
+
+static void cns3xxx_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, DRV_NAME);
+ strcpy(info->bus_info, "internal");
+}
+
+static int cns3xxx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct port *port = netdev_priv(dev);
+ return phy_ethtool_gset(port->phydev, cmd);
+}
+
+static int cns3xxx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct port *port = netdev_priv(dev);
+ return phy_ethtool_sset(port->phydev, cmd);
+}
+
+static int cns3xxx_nway_reset(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ return phy_start_aneg(port->phydev);
+}
+
+static struct ethtool_ops cns3xxx_ethtool_ops = {
+ .get_drvinfo = cns3xxx_get_drvinfo,
+ .get_settings = cns3xxx_get_settings,
+ .set_settings = cns3xxx_set_settings,
+ .nway_reset = cns3xxx_nway_reset,
+ .get_link = ethtool_op_get_link,
+};
+
+
+static int init_rings(struct sw *sw)
+{
+ int i;
+ struct _rx_ring *rx_ring = sw->rx_ring;
+ struct _tx_ring *tx_ring = sw->tx_ring;
+
+ __raw_writel(0, &sw->regs->fs_dma_ctrl0);
+ __raw_writel(TS_SUSPEND | FS_SUSPEND, &sw->regs->dma_auto_poll_cfg);
+ __raw_writel(QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
+ __raw_writel(CLR_FS_STATE | QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
+
+ __raw_writel(QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
+
+ if (!(rx_dma_pool = dma_pool_create(DRV_NAME, NULL,
+ RX_POOL_ALLOC_SIZE, 32, 0)))
+ return -ENOMEM;
+
+ if (!(rx_ring->desc = dma_pool_alloc(rx_dma_pool, GFP_KERNEL,
+ &rx_ring->phys_addr)))
+ return -ENOMEM;
+ memset(rx_ring->desc, 0, RX_POOL_ALLOC_SIZE);
+
+ /* Setup RX buffers */
+ for (i = 0; i < RX_DESCS; i++) {
+ struct rx_desc *desc = &(rx_ring)->desc[i];
+ struct sk_buff *skb;
+ if (!(skb = dev_alloc_skb(sw->mtu)))
+ return -ENOMEM;
+ if (SKB_DMA_REALIGN)
+ skb_reserve(skb, SKB_DMA_REALIGN);
+ skb_reserve(skb, NET_IP_ALIGN);
+ desc->sdl = sw->mtu;
+ if (i == (RX_DESCS - 1))
+ desc->eor = 1;
+ desc->fsd = 1;
+ desc->lsd = 1;
+
+ desc->sdp = dma_map_single(NULL, skb->data,
+ sw->mtu, DMA_FROM_DEVICE);
+ if (dma_mapping_error(NULL, desc->sdp)) {
+ return -EIO;
+ }
+ rx_ring->buff_tab[i] = skb;
+ desc->cown = 0;
+ }
+ __raw_writel(rx_ring->phys_addr, &sw->regs->fs_desc_ptr0);
+ __raw_writel(rx_ring->phys_addr, &sw->regs->fs_desc_base_addr0);
+
+ if (!(tx_dma_pool = dma_pool_create(DRV_NAME, NULL,
+ TX_POOL_ALLOC_SIZE, 32, 0)))
+ return -ENOMEM;
+
+ if (!(tx_ring->desc = dma_pool_alloc(tx_dma_pool, GFP_KERNEL,
+ &tx_ring->phys_addr)))
+ return -ENOMEM;
+ memset(tx_ring->desc, 0, TX_POOL_ALLOC_SIZE);
+
+ /* Setup TX buffers */
+ for (i = 0; i < TX_DESCS; i++) {
+ struct tx_desc *desc = &(tx_ring)->desc[i];
+ tx_ring->buff_tab[i] = 0;
+
+ if (i == (TX_DESCS - 1))
+ desc->eor = 1;
+ desc->cown = 1;
+ }
+ __raw_writel(tx_ring->phys_addr, &sw->regs->ts_desc_ptr0);
+ __raw_writel(tx_ring->phys_addr, &sw->regs->ts_desc_base_addr0);
+
+ return 0;
+}
+
+static void destroy_rings(struct sw *sw)
+{
+ int i;
+ if (sw->rx_ring->desc) {
+ for (i = 0; i < RX_DESCS; i++) {
+ struct _rx_ring *rx_ring = sw->rx_ring;
+ struct rx_desc *desc = &(rx_ring)->desc[i];
+ struct sk_buff *skb = sw->rx_ring->buff_tab[i];
+ if (skb) {
+ dma_unmap_single(NULL,
+ desc->sdp,
+ sw->mtu, DMA_FROM_DEVICE);
+ dev_kfree_skb(skb);
+ }
+ }
+ dma_pool_free(rx_dma_pool, sw->rx_ring->desc, sw->rx_ring->phys_addr);
+ dma_pool_destroy(rx_dma_pool);
+ rx_dma_pool = 0;
+ sw->rx_ring->desc = 0;
+ }
+ if (sw->tx_ring->desc) {
+ for (i = 0; i < TX_DESCS; i++) {
+ struct _tx_ring *tx_ring = sw->tx_ring;
+ struct tx_desc *desc = &(tx_ring)->desc[i];
+ struct sk_buff *skb = sw->tx_ring->buff_tab[i];
+ if (skb) {
+ dma_unmap_single(NULL, desc->sdp,
+ skb->len, DMA_TO_DEVICE);
+ dev_kfree_skb(skb);
+ }
+ }
+ dma_pool_free(tx_dma_pool, sw->tx_ring->desc, sw->tx_ring->phys_addr);
+ dma_pool_destroy(tx_dma_pool);
+ tx_dma_pool = 0;
+ sw->tx_ring->desc = 0;
+ }
+}
+
+static int eth_open(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ struct sw *sw = port->sw;
+ u32 temp;
+
+ port->speed = 0; /* force "link up" message */
+ phy_start(port->phydev);
+
+ netif_start_queue(dev);
+
+ if (!ports_open) {
+ request_irq(IRQ_CNS3XXX_SW_R0RXC, eth_rx_irq, IRQF_SHARED, "gig_switch", napi_dev);
+ napi_enable(&sw->napi);
+ netif_start_queue(napi_dev);
+ //enable_irq(IRQ_CNS3XXX_SW_R0RXC);
+
+ temp = __raw_readl(&sw->regs->mac_cfg[2]);
+ temp &= ~(PORT_DISABLE);
+ __raw_writel(temp, &sw->regs->mac_cfg[2]);
+
+ temp = __raw_readl(&sw->regs->dma_auto_poll_cfg);
+ temp &= ~(TS_SUSPEND | FS_SUSPEND);
+ __raw_writel(temp, &sw->regs->dma_auto_poll_cfg);
+
+ __raw_writel((TS_POLL_EN | FS_POLL_EN), &sw->regs->dma_auto_poll_cfg);
+ }
+ temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
+ temp &= ~(PORT_DISABLE);
+ __raw_writel(temp, &sw->regs->mac_cfg[port->id]);
+
+ ports_open++;
+ netif_carrier_on(dev);
+
+ return 0;
+}
+
+static int eth_close(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ struct sw *sw = port->sw;
+ u32 temp;
+
+ ports_open--;
+
+ temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
+ temp |= (PORT_DISABLE);
+ __raw_writel(temp, &sw->regs->mac_cfg[port->id]);
+
+ netif_stop_queue(dev);
+
+ phy_stop(port->phydev);
+
+ if (!ports_open) {
+ disable_irq(IRQ_CNS3XXX_SW_R0RXC);
+ free_irq(IRQ_CNS3XXX_SW_R0RXC, napi_dev);
+ napi_disable(&sw->napi);
+ netif_stop_queue(napi_dev);
+ temp = __raw_readl(&sw->regs->mac_cfg[2]);
+ temp |= (PORT_DISABLE);
+ __raw_writel(temp, &sw->regs->mac_cfg[2]);
+
+ __raw_writel(TS_SUSPEND | FS_SUSPEND,
+ &sw->regs->dma_auto_poll_cfg);
+ }
+
+ netif_carrier_off(dev);
+ return 0;
+}
+
+static void eth_rx_mode(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ struct sw *sw = port->sw;
+ u32 temp;
+
+ temp = __raw_readl(&sw->regs->mac_glob_cfg);
+
+ if (dev->flags & IFF_PROMISC) {
+ if (port->id == 3)
+ temp |= ((1 << 2) << PROMISC_OFFSET);
+ else
+ temp |= ((1 << port->id) << PROMISC_OFFSET);
+ } else {
+ if (port->id == 3)
+ temp &= ~((1 << 2) << PROMISC_OFFSET);
+ else
+ temp &= ~((1 << port->id) << PROMISC_OFFSET);
+ }
+ __raw_writel(temp, &sw->regs->mac_glob_cfg);
+}
+
+static int eth_set_mac(struct net_device *netdev, void *p)
+{
+ struct port *port = netdev_priv(netdev);
+ struct sw *sw = port->sw;
+ struct sockaddr *addr = p;
+ u32 cycles = 0;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ /* Invalidate old ARL Entry */
+ if (port->id == 3)
+ __raw_writel((port->id << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
+ else
+ __raw_writel(((port->id + 1) << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
+ __raw_writel( ((netdev->dev_addr[0] << 24) | (netdev->dev_addr[1] << 16) |
+ (netdev->dev_addr[2] << 8) | (netdev->dev_addr[3])),
+ &sw->regs->arl_ctrl[1]);
+
+ __raw_writel( ((netdev->dev_addr[4] << 24) | (netdev->dev_addr[5] << 16) |
+ (1 << 1)),
+ &sw->regs->arl_ctrl[2]);
+ __raw_writel((1 << 19), &sw->regs->arl_vlan_cmd);
+
+ while (((__raw_readl(&sw->regs->arl_vlan_cmd) & (1 << 21)) == 0)
+ && cycles < 5000) {
+ udelay(1);
+ cycles++;
+ }
+
+ cycles = 0;
+ memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+
+ if (port->id == 3)
+ __raw_writel((port->id << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
+ else
+ __raw_writel(((port->id + 1) << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
+ __raw_writel( ((addr->sa_data[0] << 24) | (addr->sa_data[1] << 16) |
+ (addr->sa_data[2] << 8) | (addr->sa_data[3])),
+ &sw->regs->arl_ctrl[1]);
+
+ __raw_writel( ((addr->sa_data[4] << 24) | (addr->sa_data[5] << 16) |
+ (7 << 4) | (1 << 1)), &sw->regs->arl_ctrl[2]);
+ __raw_writel((1 << 19), &sw->regs->arl_vlan_cmd);
+
+ while (((__raw_readl(&sw->regs->arl_vlan_cmd) & (1 << 21)) == 0)
+ && cycles < 5000) {
+ udelay(1);
+ cycles++;
+ }
+ return 0;
+}
+
+static int cns3xxx_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ struct port *port = netdev_priv(netdev);
+ struct sw *sw = port->sw;
+ u32 temp;
+ int i;
+ struct _rx_ring *rx_ring = sw->rx_ring;
+ struct rx_desc *desc;
+ struct sk_buff *skb;
+
+ if (new_mtu > MAX_MRU)
+ return -EINVAL;
+
+ netdev->mtu = new_mtu;
+
+ new_mtu += 36 + SKB_DMA_REALIGN;
+ port->mtu = new_mtu;
+
+ new_mtu = 0;
+ for (i = 0; i < 3; i++) {
+ if (switch_port_tab[i]) {
+ if (switch_port_tab[i]->mtu > new_mtu)
+ new_mtu = switch_port_tab[i]->mtu;
+ }
+ }
+
+
+ if (new_mtu == sw->mtu)
+ return 0;
+
+ disable_irq(IRQ_CNS3XXX_SW_R0RXC);
+
+ sw->mtu = new_mtu;
+
+ /* Disable DMA */
+ __raw_writel(TS_SUSPEND | FS_SUSPEND, &sw->regs->dma_auto_poll_cfg);
+
+ for (i = 0; i < RX_DESCS; i++) {
+ desc = &(rx_ring)->desc[i];
+ /* Check if we own it, if we do, it will get set correctly
+ * when it is re-used */
+ if (!desc->cown) {
+ skb = rx_ring->buff_tab[i];
+ dma_unmap_single(NULL, desc->sdp, desc->sdl,
+ DMA_FROM_DEVICE);
+ dev_kfree_skb(skb);
+
+ if ((skb = dev_alloc_skb(new_mtu))) {
+ if (SKB_DMA_REALIGN)
+ skb_reserve(skb, SKB_DMA_REALIGN);
+ skb_reserve(skb, NET_IP_ALIGN);
+ desc->sdp = dma_map_single(NULL, skb->data,
+ new_mtu, DMA_FROM_DEVICE);
+ if (dma_mapping_error(NULL, desc->sdp)) {
+ dev_kfree_skb(skb);
+ skb = NULL;
+ }
+ }
+
+ /* put the new buffer on RX-free queue */
+ rx_ring->buff_tab[i] = skb;
+
+ if (i == RX_DESCS - 1)
+ desc->config0 = END_OF_RING | FIRST_SEGMENT |
+ LAST_SEGMENT | new_mtu;
+ else
+ desc->config0 = FIRST_SEGMENT |
+ LAST_SEGMENT | new_mtu;
+ }
+ }
+
+ /* Re-ENABLE DMA */
+ temp = __raw_readl(&sw->regs->dma_auto_poll_cfg);
+ temp &= ~(TS_SUSPEND | FS_SUSPEND);
+ __raw_writel(temp, &sw->regs->dma_auto_poll_cfg);
+
+ __raw_writel((TS_POLL_EN | FS_POLL_EN), &sw->regs->dma_auto_poll_cfg);
+
+ enable_irq(IRQ_CNS3XXX_SW_R0RXC);
+
+ return 0;
+}
+
+static const struct net_device_ops cns3xxx_netdev_ops = {
+ .ndo_open = eth_open,
+ .ndo_stop = eth_close,
+ .ndo_start_xmit = eth_xmit,
+ .ndo_set_rx_mode = eth_rx_mode,
+ .ndo_do_ioctl = eth_ioctl,
+ .ndo_change_mtu = cns3xxx_change_mtu,
+ .ndo_set_mac_address = eth_set_mac,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static int __devinit eth_init_one(struct platform_device *pdev)
+{
+ int i;
+ struct port *port;
+ struct sw *sw;
+ struct net_device *dev;
+ struct cns3xxx_plat_info *plat = pdev->dev.platform_data;
+ u32 regs_phys;
+ char phy_id[MII_BUS_ID_SIZE + 3];
+ int err;
+ u32 temp;
+
+ spin_lock_init(&tx_lock);
+ spin_lock_init(&stat_lock);
+
+ if (!(napi_dev = alloc_etherdev(sizeof(struct sw))))
+ return -ENOMEM;
+ strcpy(napi_dev->name, "switch%d");
+
+ SET_NETDEV_DEV(napi_dev, &pdev->dev);
+ sw = netdev_priv(napi_dev);
+ memset(sw, 0, sizeof(struct sw));
+ sw->regs = (struct switch_regs __iomem *)CNS3XXX_SWITCH_BASE_VIRT;
+ regs_phys = CNS3XXX_SWITCH_BASE;
+ sw->mem_res = request_mem_region(regs_phys, REGS_SIZE, napi_dev->name);
+ if (!sw->mem_res) {
+ err = -EBUSY;
+ goto err_free;
+ }
+
+ sw->mtu = 1536 + SKB_DMA_REALIGN;
+
+ for (i = 0; i < 4; i++) {
+ temp = __raw_readl(&sw->regs->mac_cfg[i]);
+ temp |= (PORT_DISABLE) | 0x80000000;
+ __raw_writel(temp, &sw->regs->mac_cfg[i]);
+ }
+
+ temp = PORT_DISABLE;
+ __raw_writel(temp, &sw->regs->mac_cfg[2]);
+
+ temp = __raw_readl(&sw->regs->vlan_cfg);
+ temp |= NIC_MODE | VLAN_UNAWARE;
+ __raw_writel(temp, &sw->regs->vlan_cfg);
+
+ __raw_writel(UNKNOWN_VLAN_TO_CPU | ACCEPT_CRC_PACKET |
+ CRC_STRIPPING, &sw->regs->mac_glob_cfg);
+
+ if (!(sw->rx_ring = kmalloc(sizeof(struct _rx_ring), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto err_free;
+ }
+ memset(sw->rx_ring, 0, sizeof(struct _rx_ring));
+
+ if (!(sw->tx_ring = kmalloc(sizeof(struct _tx_ring), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto err_free_rx;
+ }
+ memset(sw->tx_ring, 0, sizeof(struct _tx_ring));
+
+ if ((err = init_rings(sw)) != 0) {
+ destroy_rings(sw);
+ err = -ENOMEM;
+ goto err_free_rings;
+ }
+ platform_set_drvdata(pdev, napi_dev);
+
+ netif_napi_add(napi_dev, &sw->napi, eth_poll, NAPI_WEIGHT);
+
+ for (i = 0; i < 3; i++) {
+ if (!(plat->ports & (1 << i))) {
+ continue;
+ }
+
+ if (!(dev = alloc_etherdev(sizeof(struct port)))) {
+ goto free_ports;
+ }
+
+ //SET_NETDEV_DEV(dev, &pdev->dev);
+ port = netdev_priv(dev);
+ port->netdev = dev;
+ if (i == 2)
+ port->id = 3;
+ else
+ port->id = i;
+ port->sw = sw;
+ port->mtu = sw->mtu;
+
+ temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
+ temp |= (PORT_DISABLE);
+ __raw_writel(temp, &sw->regs->mac_cfg[port->id]);
+
+ dev->netdev_ops = &cns3xxx_netdev_ops;
+ dev->ethtool_ops = &cns3xxx_ethtool_ops;
+ dev->tx_queue_len = 1000;
+ dev->features = NETIF_F_HW_CSUM;
+
+ dev->vlan_features = NETIF_F_HW_CSUM;
+
+ switch_port_tab[i] = port;
+ memcpy(dev->dev_addr, &plat->hwaddr[i], ETH_ALEN);
+
+ snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, "0", plat->phy[i]);
+ port->phydev = phy_connect(dev, phy_id, &cns3xxx_adjust_link, 0,
+ PHY_INTERFACE_MODE_RGMII);
+ if ((err = IS_ERR(port->phydev))) {
+ switch_port_tab[i] = 0;
+ free_netdev(dev);
+ goto free_ports;
+ }
+
+ port->phydev->irq = PHY_POLL;
+
+ if ((err = register_netdev(dev))) {
+ phy_disconnect(port->phydev);
+ switch_port_tab[i] = 0;
+ free_netdev(dev);
+ goto free_ports;
+ }
+
+ printk(KERN_INFO "%s: RGMII PHY %i on cns3xxx Switch\n", dev->name, plat->phy[i]);
+ netif_carrier_off(dev);
+ dev = 0;
+ }
+
+ return 0;
+
+free_ports:
+ err = -ENOMEM;
+ for (--i; i >= 0; i--) {
+ if (switch_port_tab[i]) {
+ port = switch_port_tab[i];
+ dev = port->netdev;
+ unregister_netdev(dev);
+ phy_disconnect(port->phydev);
+ switch_port_tab[i] = 0;
+ free_netdev(dev);
+ }
+ }
+err_free_rings:
+ kfree(sw->tx_ring);
+err_free_rx:
+ kfree(sw->rx_ring);
+err_free:
+ free_netdev(napi_dev);
+ return err;
+}
+
+static int __devexit eth_remove_one(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct sw *sw = netdev_priv(dev);
+ int i;
+ destroy_rings(sw);
+
+ for (i = 2; i >= 0; i--) {
+ if (switch_port_tab[i]) {
+ struct port *port = switch_port_tab[i];
+ struct net_device *dev = port->netdev;
+ unregister_netdev(dev);
+ phy_disconnect(port->phydev);
+ switch_port_tab[i] = 0;
+ free_netdev(dev);
+ }
+ }
+
+ release_resource(sw->mem_res);
+ free_netdev(napi_dev);
+ return 0;
+}
+
+static struct platform_driver cns3xxx_eth_driver = {
+ .driver.name = DRV_NAME,
+ .probe = eth_init_one,
+ .remove = eth_remove_one,
+};
+
+static int __init eth_init_module(void)
+{
+ int err;
+ if ((err = cns3xxx_mdio_register()))
+ return err;
+ return platform_driver_register(&cns3xxx_eth_driver);
+}
+
+static void __exit eth_cleanup_module(void)
+{
+ platform_driver_unregister(&cns3xxx_eth_driver);
+ cns3xxx_mdio_remove();
+}
+
+module_init(eth_init_module);
+module_exit(eth_cleanup_module);
+
+MODULE_AUTHOR("Chris Lang");
+MODULE_DESCRIPTION("Cavium CNS3xxx Ethernet driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:cns3xxx_eth");
--- /dev/null
+++ b/arch/arm/mach-cns3xxx/include/mach/platform.h
@@ -0,0 +1,26 @@
+/*
+ * arch/arm/mach-cns3xxx/include/mach/platform.h
+ *
+ * Copyright 2011 Gateworks Corporation
+ * Chris Lang <clang@gateworks.com
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, Version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef __ASM_ARCH_PLATFORM_H
+#define __ASM_ARCH_PLATFORM_H
+
+#ifndef __ASSEMBLY__
+
+/* Information about built-in Ethernet MAC interfaces */
+struct cns3xxx_plat_info {
+ u8 ports; /* Bitmap of enabled Ports */
+ u8 hwaddr[4][6];
+ u32 phy[3];
+};
+
+#endif /* __ASM_ARCH_PLATFORM_H */
+#endif
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -32,6 +32,7 @@ source "drivers/net/ethernet/calxeda/Kco
source "drivers/net/ethernet/chelsio/Kconfig"
source "drivers/net/ethernet/cirrus/Kconfig"
source "drivers/net/ethernet/cisco/Kconfig"
+source "drivers/net/ethernet/cavium/Kconfig"
source "drivers/net/ethernet/davicom/Kconfig"
config DNET
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_NET_BFIN) += adi/
obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
obj-$(CONFIG_NET_VENDOR_BROCADE) += brocade/
obj-$(CONFIG_NET_CALXEDA_XGMAC) += calxeda/
+obj-$(CONFIG_NET_VENDOR_CAVIUM) += cavium/
obj-$(CONFIG_NET_VENDOR_CHELSIO) += chelsio/
obj-$(CONFIG_NET_VENDOR_CIRRUS) += cirrus/
obj-$(CONFIG_NET_VENDOR_CISCO) += cisco/
--- /dev/null
+++ b/drivers/net/ethernet/cavium/Kconfig
@@ -0,0 +1,24 @@
+config NET_VENDOR_CAVIUM
+ bool "Cavium devices"
+ default y
+ depends on ARCH_CNS3XXX
+ ---help---
+ If you have a network (Ethernet) chipset belonging to this class,
+ say Y.
+
+ Note that the answer to this question does not directly affect
+ the kernel: saying N will just case the configurator to skip all
+ the questions regarding AMD chipsets. If you say Y, you will be asked
+ for your specific chipset/driver in the following questions.
+
+if NET_VENDOR_CAVIUM
+
+config CNS3XXX_ETH
+ tristate "Cavium CNS3xxx Ethernet support"
+ depends on ARCH_CNS3XXX
+ select PHYLIB
+ help
+ Say Y here if you want to use built-in Ethernet ports
+ on CNS3XXX processor.
+
+endif
--- /dev/null
+++ b/drivers/net/ethernet/cavium/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the Cavium ethernet device drivers.
+#
+
+obj-$(CNS3XXX_ETH) += cns3xxx_eth.o
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