summaryrefslogtreecommitdiff
path: root/target/linux/cns3xxx/patches-3.3/051-cns3xxx_gigabit.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/cns3xxx/patches-3.3/051-cns3xxx_gigabit.patch')
-rw-r--r--target/linux/cns3xxx/patches-3.3/051-cns3xxx_gigabit.patch1357
1 files changed, 1357 insertions, 0 deletions
diff --git a/target/linux/cns3xxx/patches-3.3/051-cns3xxx_gigabit.patch b/target/linux/cns3xxx/patches-3.3/051-cns3xxx_gigabit.patch
new file mode 100644
index 0000000..72306d9
--- /dev/null
+++ b/target/linux/cns3xxx/patches-3.3/051-cns3xxx_gigabit.patch
@@ -0,0 +1,1357 @@
+--- /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
generated by cgit v1.1 at 2024-12-15 15:52:25 +0000