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Commit dd1fb828 authored by Felix Fietkau's avatar Felix Fietkau
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cns3xxx: merge ethernet driver changes from gateworks 

SVN-Revision: 33489
parent 190b4344
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target/linux/cns3xxx/patches-3.3/051-cns3xxx_gigabit.patch
+ 258
− 230
View file @ dd1fb828
--- /dev/null
+++ b/drivers/net/ethernet/cavium/cns3xxx_eth.c
@@ -0,0 +1,1270 @@
@@ -0,0 +1,1298 @@
+/*
+ * Cavium CNS3xxx Gigabit driver for Linux
+ *
......@@ -36,7 +36,8 @@
+#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 MAX_MRU (1536 + SKB_DMA_REALIGN)
+#define CNS3XXX_MAX_MTU (1536)
+
+#define NAPI_WEIGHT 64
+
......@@ -57,7 +58,12 @@
+#define TCP_CHECKSUM 0x00010000
+
+/* Port Config Defines */
+#define PORT_BP_ENABLE 0x00020000
+#define PORT_DISABLE 0x00040000
+#define PORT_LEARN_DIS 0x00080000
+#define PORT_BLOCK_STATE 0x00100000
+#define PORT_BLOCK_MODE 0x00200000
+
+#define PROMISC_OFFSET 29
+
+/* Global Config Defines */
......@@ -79,6 +85,14 @@
+#define QUEUE_THRESHOLD 0x000000f0
+#define CLR_FS_STATE 0x80000000
+
+/* Interrupt Status Defines */
+#define MAC0_STATUS_CHANGE 0x00004000
+#define MAC1_STATUS_CHANGE 0x00008000
+#define MAC2_STATUS_CHANGE 0x00010000
+#define MAC0_RX_ERROR 0x00100000
+#define MAC1_RX_ERROR 0x00200000
+#define MAC2_RX_ERROR 0x00400000
+
+struct tx_desc
+{
+ u32 sdp; /* segment data pointer */
......@@ -188,6 +202,7 @@
+ u8 alignment[16]; /* for 32 byte alignment */
+};
+
+
+struct switch_regs {
+ u32 phy_control;
+ u32 phy_auto_addr;
......@@ -233,6 +248,8 @@
+ u32 fs_dma_ctrl1;
+ u32 fs_desc_ptr1;
+ u32 fs_desc_base_addr1;
+ u32 __res7[109];
+ u32 mac_counter0[13];
+};
+
+struct _tx_ring {
......@@ -240,6 +257,7 @@
+ dma_addr_t phys_addr;
+ struct tx_desc *cur_addr;
+ struct sk_buff *buff_tab[TX_DESCS];
+ unsigned int phys_tab[TX_DESCS];
+ u32 free_index;
+ u32 count_index;
+ u32 cur_index;
......@@ -252,6 +270,7 @@
+ dma_addr_t phys_addr;
+ struct rx_desc *cur_addr;
+ struct sk_buff *buff_tab[RX_DESCS];
+ unsigned int phys_tab[RX_DESCS];
+ u32 cur_index;
+ u32 alloc_index;
+ int alloc_count;
......@@ -264,7 +283,6 @@
+ struct cns3xxx_plat_info *plat;
+ struct _tx_ring *tx_ring;
+ struct _rx_ring *rx_ring;
+ u32 mtu;
+};
+
+struct port {
......@@ -273,16 +291,14 @@
+ 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 DEFINE_SPINLOCK(tx_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 port *switch_port_tab[4];
+static struct dma_pool *rx_dma_pool;
+static struct dma_pool *tx_dma_pool;
+struct net_device *napi_dev;
......@@ -380,6 +396,16 @@
+ mdiobus_free(mdio_bus);
+}
+
+static void enable_tx_dma(struct sw *sw)
+{
+ __raw_writel(0x1, &sw->regs->ts_dma_ctrl0);
+}
+
+static void enable_rx_dma(struct sw *sw)
+{
+ __raw_writel(0x1, &sw->regs->fs_dma_ctrl0);
+}
+
+static void cns3xxx_adjust_link(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
......@@ -414,30 +440,85 @@
+ return (IRQ_HANDLED);
+}
+
+irqreturn_t eth_stat_irq(int irq, void *pdev)
+{
+ struct net_device *dev = pdev;
+ struct sw *sw = netdev_priv(dev);
+ u32 cfg;
+ u32 stat = __raw_readl(&sw->regs->intr_stat);
+ __raw_writel(0xffffffff, &sw->regs->intr_stat);
+
+ if (stat & MAC2_RX_ERROR)
+ switch_port_tab[3]->netdev->stats.rx_dropped++;
+ if (stat & MAC1_RX_ERROR)
+ switch_port_tab[1]->netdev->stats.rx_dropped++;
+ if (stat & MAC0_RX_ERROR)
+ switch_port_tab[0]->netdev->stats.rx_dropped++;
+
+ if (stat & MAC0_STATUS_CHANGE) {
+ cfg = __raw_readl(&sw->regs->mac_cfg[0]);
+ switch_port_tab[0]->phydev->link = (cfg & 0x1);
+ switch_port_tab[0]->phydev->duplex = ((cfg >> 4) & 0x1);
+ if (((cfg >> 2) & 0x3) == 2)
+ switch_port_tab[0]->phydev->speed = 1000;
+ else if (((cfg >> 2) & 0x3) == 1)
+ switch_port_tab[0]->phydev->speed = 100;
+ else
+ switch_port_tab[0]->phydev->speed = 10;
+ cns3xxx_adjust_link(switch_port_tab[0]->netdev);
+ }
+
+ if (stat & MAC1_STATUS_CHANGE) {
+ cfg = __raw_readl(&sw->regs->mac_cfg[1]);
+ switch_port_tab[1]->phydev->link = (cfg & 0x1);
+ switch_port_tab[1]->phydev->duplex = ((cfg >> 4) & 0x1);
+ if (((cfg >> 2) & 0x3) == 2)
+ switch_port_tab[1]->phydev->speed = 1000;
+ else if (((cfg >> 2) & 0x3) == 1)
+ switch_port_tab[1]->phydev->speed = 100;
+ else
+ switch_port_tab[1]->phydev->speed = 10;
+ cns3xxx_adjust_link(switch_port_tab[1]->netdev);
+ }
+
+ if (stat & MAC2_STATUS_CHANGE) {
+ cfg = __raw_readl(&sw->regs->mac_cfg[3]);
+ switch_port_tab[3]->phydev->link = (cfg & 0x1);
+ switch_port_tab[3]->phydev->duplex = ((cfg >> 4) & 0x1);
+ if (((cfg >> 2) & 0x3) == 2)
+ switch_port_tab[3]->phydev->speed = 1000;
+ else if (((cfg >> 2) & 0x3) == 1)
+ switch_port_tab[3]->phydev->speed = 100;
+ else
+ switch_port_tab[3]->phydev->speed = 10;
+ cns3xxx_adjust_link(switch_port_tab[3]->netdev);
+ }
+
+ 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 rx_desc *desc = &(rx_ring)->desc[i];
+ struct sk_buff *skb;
+ u32 mtu = sw->mtu;
+
+ rx_ring->alloc_count += received;
+ unsigned int phys;
+
+ for (received = rx_ring->alloc_count; received > 0; received--) {
+ desc = &(rx_ring)->desc[i];
+
+ if ((skb = dev_alloc_skb(mtu))) {
+ for (received += rx_ring->alloc_count; received > 0; received--) {
+ if ((skb = dev_alloc_skb(MAX_MRU))) {
+ 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)) {
+ phys = dma_map_single(NULL, skb->data,
+ CNS3XXX_MAX_MTU, DMA_FROM_DEVICE);
+ if (dma_mapping_error(NULL, phys)) {
+ dev_kfree_skb(skb);
+ /* Failed to map, better luck next time */
+ goto out;;
+ }
+ desc->sdp = phys;
+ } else {
+ /* Failed to allocate skb, try again next time */
+ goto out;
......@@ -445,13 +526,16 @@
+
+ /* put the new buffer on RX-free queue */
+ rx_ring->buff_tab[i] = skb;
+
+ if (++i == RX_DESCS) {
+ rx_ring->phys_tab[i] = phys;
+ if (i == RX_DESCS - 1) {
+ i = 0;
+ desc->config0 = END_OF_RING | FIRST_SEGMENT |
+ LAST_SEGMENT | mtu;
+ LAST_SEGMENT | CNS3XXX_MAX_MTU;
+ desc = &(rx_ring)->desc[i];
+ } else {
+ desc->config0 = FIRST_SEGMENT | LAST_SEGMENT | mtu;
+ desc->config0 = FIRST_SEGMENT | LAST_SEGMENT | CNS3XXX_MAX_MTU;
+ i++;
+ desc++;
+ }
+ }
+out:
......@@ -459,58 +543,14 @@
+ 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;
+ int num_used = tx_ring->num_used;
+ struct sk_buff *skb;
+
+ if (num_used < (TX_DESCS >> 1))
+ return;
......@@ -519,14 +559,18 @@
+ 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;
+ skb = tx_ring->buff_tab[index];
+ tx_ring->buff_tab[index] = 0;
+ if (skb)
+ dev_kfree_skb_any(skb);
+ dma_unmap_single(NULL, tx_ring->phys_tab[index],
+ desc->sdl, DMA_TO_DEVICE);
+ if (++index == TX_DESCS) {
+ index = 0;
+ desc = &(tx_ring)->desc[index];
+ } else {
+ desc++;
+ }
+ } else {
+ break;
+ }
......@@ -543,9 +587,7 @@
+ 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;
......@@ -555,19 +597,11 @@
+
+ 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;
+ dev = switch_port_tab[desc->sp]->netdev;
+
+ length = desc->sdl;
+ /* process received frame */
+ dma_unmap_single(&dev->dev, desc->sdp,
+ dma_unmap_single(&dev->dev, rx_ring->phys_tab[i],
+ length, DMA_FROM_DEVICE);
+
+ skb_put(skb, length);
......@@ -578,6 +612,7 @@
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += length;
+
+ /* RX Hardware checksum offload */
+ switch (desc->prot) {
+ case 1:
+ case 2:
......@@ -598,10 +633,17 @@
+ napi_gro_receive(napi, skb);
+
+ received++;
+ desc = next_desc;
+
+ if (++i == RX_DESCS) {
+ i = 0;
+ desc = &(rx_ring)->desc[i];
+ } else {
+ desc++;
+ }
+ }
+
+ cns3xxx_alloc_rx_buf(sw, received);
+
+ rx_ring->cur_index = i;
+
+ if (received != budget) {
......@@ -609,6 +651,8 @@
+ enable_irq(IRQ_CNS3XXX_SW_R0RXC);
+ }
+
+ enable_rx_dma(sw);
+
+ return received;
+}
+
......@@ -619,63 +663,132 @@
+ struct _tx_ring *tx_ring = sw->tx_ring;
+ struct tx_desc *tx_desc;
+ int index;
+ int len = skb->len;
+ int len;
+ char pmap = (1 << port->id);
+ unsigned int phys;
+ int nr_frags = skb_shinfo(skb)->nr_frags;
+ struct skb_frag_struct *frag;
+ unsigned int i;
+
+ if (pmap == 8)
+ pmap = (1 << 4);
+
+ if (unlikely(len > sw->mtu)) {
+ if (skb->len > CNS3XXX_MAX_MTU) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ update_tx_stats(sw);
+
+ spin_lock_bh(&tx_lock);
+ spin_lock(&tx_lock);
+
+ clear_tx_desc(sw);
+
+ if (unlikely(tx_ring->num_used == TX_DESCS)) {
+ spin_unlock_bh(&tx_lock);
+ return NETDEV_TX_BUSY;
+ if ((tx_ring->num_used + nr_frags) >= TX_DESCS) {
+ clear_tx_desc(sw);
+ if ((tx_ring->num_used + nr_frags) >= TX_DESCS) {
+ spin_unlock(&tx_lock);
+ return NETDEV_TX_BUSY;
+ }
+ }
+
+ index = tx_ring->cur_index;
+ tx_ring->cur_index = ((tx_ring->cur_index + nr_frags + 1) % TX_DESCS);
+
+ if (unlikely(++tx_ring->cur_index == TX_DESCS))
+ tx_ring->cur_index = 0;
+ spin_unlock(&tx_lock);
+
+ tx_ring->num_used++;
+ tx_ring->num_count++;
+ if (!nr_frags) {
+ tx_desc = &(tx_ring)->desc[index];
+
+ spin_unlock_bh(&tx_lock);
+ len = skb->len;
+
+ tx_desc = &(tx_ring)->desc[index];
+ phys = dma_map_single(NULL, skb->data, len,
+ DMA_TO_DEVICE);
+
+ tx_desc->sdp = dma_map_single(NULL, skb->data, len,
+ DMA_TO_DEVICE);
+ tx_desc->sdp = phys;
+ tx_desc->pmap = pmap;
+ tx_ring->phys_tab[index] = phys;
+
+ if (dma_mapping_error(NULL, tx_desc->sdp)) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_errors++;
+ return NETDEV_TX_OK;
+ }
+ 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;
+ }
+ } else {
+ unsigned int config;
+
+ tx_desc->pmap = pmap;
+ tx_ring->buff_tab[index] = skb;
+ index = ((index + nr_frags) % TX_DESCS);
+ tx_desc = &(tx_ring)->desc[index];
+
+ 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;
+ /* fragments */
+ for (i = nr_frags; i > 0; i--) {
+ void *addr;
+
+ frag = &skb_shinfo(skb)->frags[i-1];
+ len = frag->size;
+
+ addr = page_address(skb_frag_page(frag)) +
+ frag->page_offset;
+ phys = dma_map_single(NULL, addr, len, DMA_TO_DEVICE);
+
+ tx_desc->sdp = phys;
+
+ tx_desc->pmap = pmap;
+ tx_ring->phys_tab[index] = phys;
+
+ config = FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
+ TCP_CHECKSUM | len;
+ if (i == nr_frags) {
+ config |= LAST_SEGMENT;
+ tx_ring->buff_tab[index] = skb;
+ }
+ if (index == TX_DESCS - 1)
+ config |= END_OF_RING;
+ tx_desc->config0 = config;
+
+ if (index == 0) {
+ index = TX_DESCS - 1;
+ tx_desc = &(tx_ring)->desc[index];
+ } else {
+ index--;
+ tx_desc--;
+ }
+ }
+
+ /* header */
+ len = skb->len - skb->data_len;
+
+ phys = dma_map_single(NULL, skb->data, len,
+ DMA_TO_DEVICE);
+
+ tx_desc->sdp = phys;
+ tx_desc->pmap = pmap;
+ tx_ring->phys_tab[index] = phys;
+
+ if (index == TX_DESCS - 1) {
+ tx_desc->config0 = END_OF_RING | FIRST_SEGMENT |
+ FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
+ TCP_CHECKSUM | len;
+ } else {
+ tx_desc->config0 = FIRST_SEGMENT |
+ FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
+ TCP_CHECKSUM | len;
+ }
+ }
+
+ mb();
+
+ spin_lock(&tx_lock);
+ tx_ring->num_used += nr_frags + 1;
+ spin_unlock(&tx_lock);
+
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ enable_tx_dma(sw);
+
+ return NETDEV_TX_OK;
+}
+
......@@ -750,23 +863,24 @@
+ 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)))
+ if (!(skb = dev_alloc_skb(MAX_MRU)))
+ return -ENOMEM;
+ if (SKB_DMA_REALIGN)
+ skb_reserve(skb, SKB_DMA_REALIGN);
+ skb_reserve(skb, NET_IP_ALIGN);
+ desc->sdl = sw->mtu;
+ desc->sdl = CNS3XXX_MAX_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);
+ CNS3XXX_MAX_MTU, DMA_FROM_DEVICE);
+ if (dma_mapping_error(NULL, desc->sdp)) {
+ return -EIO;
+ }
+ rx_ring->buff_tab[i] = skb;
+ rx_ring->phys_tab[i] = desc->sdp;
+ desc->cown = 0;
+ }
+ __raw_writel(rx_ring->phys_addr, &sw->regs->fs_desc_ptr0);
......@@ -807,7 +921,7 @@
+ if (skb) {
+ dma_unmap_single(NULL,
+ desc->sdp,
+ sw->mtu, DMA_FROM_DEVICE);
+ CNS3XXX_MAX_MTU, DMA_FROM_DEVICE);
+ dev_kfree_skb(skb);
+ }
+ }
......@@ -847,9 +961,12 @@
+
+ if (!ports_open) {
+ request_irq(IRQ_CNS3XXX_SW_R0RXC, eth_rx_irq, IRQF_SHARED, "gig_switch", napi_dev);
+ request_irq(IRQ_CNS3XXX_SW_STATUS, eth_stat_irq, IRQF_SHARED, "gig_stat", napi_dev);
+ napi_enable(&sw->napi);
+ netif_start_queue(napi_dev);
+ //enable_irq(IRQ_CNS3XXX_SW_R0RXC);
+
+ __raw_writel(~(MAC0_STATUS_CHANGE | MAC1_STATUS_CHANGE | MAC2_STATUS_CHANGE |
+ MAC0_RX_ERROR | MAC1_RX_ERROR | MAC2_RX_ERROR), &sw->regs->intr_mask);
+
+ temp = __raw_readl(&sw->regs->mac_cfg[2]);
+ temp &= ~(PORT_DISABLE);
......@@ -859,7 +976,7 @@
+ 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_rx_dma(sw);
+ }
+ temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
+ temp &= ~(PORT_DISABLE);
......@@ -890,6 +1007,8 @@
+ if (!ports_open) {
+ disable_irq(IRQ_CNS3XXX_SW_R0RXC);
+ free_irq(IRQ_CNS3XXX_SW_R0RXC, napi_dev);
+ disable_irq(IRQ_CNS3XXX_SW_STATUS);
+ free_irq(IRQ_CNS3XXX_SW_STATUS, napi_dev);
+ napi_disable(&sw->napi);
+ netif_stop_queue(napi_dev);
+ temp = __raw_readl(&sw->regs->mac_cfg[2]);
......@@ -979,96 +1098,13 @@
+ 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_change_mtu = eth_change_mtu,
+ .ndo_set_mac_address = eth_set_mac,
+ .ndo_validate_addr = eth_validate_addr,
+};
......@@ -1085,12 +1121,10 @@
+ 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");
+ napi_dev->features = NETIF_F_IP_CSUM | NETIF_F_SG;
+
+ SET_NETDEV_DEV(napi_dev, &pdev->dev);
+ sw = netdev_priv(napi_dev);
......@@ -1103,11 +1137,9 @@
+ 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;
+ temp |= (PORT_DISABLE);
+ __raw_writel(temp, &sw->regs->mac_cfg[i]);
+ }
+
......@@ -1118,7 +1150,7 @@
+ temp |= NIC_MODE | VLAN_UNAWARE;
+ __raw_writel(temp, &sw->regs->vlan_cfg);
+
+ __raw_writel(UNKNOWN_VLAN_TO_CPU | ACCEPT_CRC_PACKET |
+ __raw_writel(UNKNOWN_VLAN_TO_CPU |
+ CRC_STRIPPING, &sw->regs->mac_glob_cfg);
+
+ if (!(sw->rx_ring = kmalloc(sizeof(struct _rx_ring), GFP_KERNEL))) {
......@@ -1151,7 +1183,6 @@
+ goto free_ports;
+ }
+
+ //SET_NETDEV_DEV(dev, &pdev->dev);
+ port = netdev_priv(dev);
+ port->netdev = dev;
+ if (i == 2)
......@@ -1159,36 +1190,33 @@
+ else
+ port->id = i;
+ port->sw = sw;
+ port->mtu = sw->mtu;
+
+ temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
+ temp |= (PORT_DISABLE);
+ temp |= (PORT_DISABLE | PORT_BLOCK_STATE | PORT_LEARN_DIS);
+ __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;
+ dev->features = NETIF_F_IP_CSUM | NETIF_F_SG;
+
+ switch_port_tab[i] = port;
+ switch_port_tab[port->id] = 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;
+ switch_port_tab[port->id] = 0;
+ free_netdev(dev);
+ goto free_ports;
+ }
+
+ port->phydev->irq = PHY_POLL;
+ port->phydev->irq = PHY_IGNORE_INTERRUPT;
+
+ if ((err = register_netdev(dev))) {
+ phy_disconnect(port->phydev);
+ switch_port_tab[i] = 0;
+ switch_port_tab[port->id] = 0;
+ free_netdev(dev);
+ goto free_ports;
+ }
......@@ -1228,7 +1256,7 @@
+ int i;
+ destroy_rings(sw);
+
+ for (i = 2; i >= 0; i--) {
+ for (i = 3; i >= 0; i--) {
+ if (switch_port_tab[i]) {
+ struct port *port = switch_port_tab[i];
+ struct net_device *dev = port->netdev;
......
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