#include "ag71xx.h"
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+static inline void skb_free_frag(void *data)
+{
+ put_page(virt_to_head_page(data));
+}
+#endif
+
#define AG71XX_DEFAULT_MSG_ENABLE \
(NETIF_MSG_DRV \
| NETIF_MSG_PROBE \
module_param_named(msg_level, ag71xx_msg_level, int, 0);
MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
+#define ETH_SWITCH_HEADER_LEN 2
+
+static int ag71xx_tx_packets(struct ag71xx *ag, bool flush);
+
+static inline unsigned int ag71xx_max_frame_len(unsigned int mtu)
+{
+ return ETH_SWITCH_HEADER_LEN + ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN;
+}
+
static void ag71xx_dump_dma_regs(struct ag71xx *ag)
{
DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n",
static void ag71xx_ring_free(struct ag71xx_ring *ring)
{
+ int ring_size = BIT(ring->order);
kfree(ring->buf);
if (ring->descs_cpu)
- dma_free_coherent(NULL, ring->size * ring->desc_size,
+ dma_free_coherent(NULL, ring_size * AG71XX_DESC_SIZE,
ring->descs_cpu, ring->descs_dma);
}
static int ag71xx_ring_alloc(struct ag71xx_ring *ring)
{
+ int ring_size = BIT(ring->order);
int err;
- int i;
-
- ring->desc_size = sizeof(struct ag71xx_desc);
- if (ring->desc_size % cache_line_size()) {
- DBG("ag71xx: ring %p, desc size %u rounded to %u\n",
- ring, ring->desc_size,
- roundup(ring->desc_size, cache_line_size()));
- ring->desc_size = roundup(ring->desc_size, cache_line_size());
- }
- ring->descs_cpu = dma_alloc_coherent(NULL, ring->size * ring->desc_size,
+ ring->descs_cpu = dma_alloc_coherent(NULL, ring_size * AG71XX_DESC_SIZE,
&ring->descs_dma, GFP_ATOMIC);
if (!ring->descs_cpu) {
err = -ENOMEM;
}
- ring->buf = kzalloc(ring->size * sizeof(*ring->buf), GFP_KERNEL);
+ ring->buf = kzalloc(ring_size * sizeof(*ring->buf), GFP_KERNEL);
if (!ring->buf) {
err = -ENOMEM;
goto err;
}
- for (i = 0; i < ring->size; i++) {
- int idx = i * ring->desc_size;
- ring->buf[i].desc = (struct ag71xx_desc *)&ring->descs_cpu[idx];
- DBG("ag71xx: ring %p, desc %d at %p\n",
- ring, i, ring->buf[i].desc);
- }
-
return 0;
err:
{
struct ag71xx_ring *ring = &ag->tx_ring;
struct net_device *dev = ag->dev;
+ int ring_mask = BIT(ring->order) - 1;
u32 bytes_compl = 0, pkts_compl = 0;
while (ring->curr != ring->dirty) {
- u32 i = ring->dirty % ring->size;
+ struct ag71xx_desc *desc;
+ u32 i = ring->dirty & ring_mask;
- if (!ag71xx_desc_empty(ring->buf[i].desc)) {
- ring->buf[i].desc->ctrl = 0;
+ desc = ag71xx_ring_desc(ring, i);
+ if (!ag71xx_desc_empty(desc)) {
+ desc->ctrl = 0;
dev->stats.tx_errors++;
}
if (ring->buf[i].skb) {
- bytes_compl += ring->buf[i].skb->len;
+ bytes_compl += ring->buf[i].len;
pkts_compl++;
dev_kfree_skb_any(ring->buf[i].skb);
}
static void ag71xx_ring_tx_init(struct ag71xx *ag)
{
struct ag71xx_ring *ring = &ag->tx_ring;
+ int ring_size = BIT(ring->order);
+ int ring_mask = ring_size - 1;
int i;
- for (i = 0; i < ring->size; i++) {
- ring->buf[i].desc->next = (u32) (ring->descs_dma +
- ring->desc_size * ((i + 1) % ring->size));
+ for (i = 0; i < ring_size; i++) {
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
- ring->buf[i].desc->ctrl = DESC_EMPTY;
+ desc->next = (u32) (ring->descs_dma +
+ AG71XX_DESC_SIZE * ((i + 1) & ring_mask));
+
+ desc->ctrl = DESC_EMPTY;
ring->buf[i].skb = NULL;
}
static void ag71xx_ring_rx_clean(struct ag71xx *ag)
{
struct ag71xx_ring *ring = &ag->rx_ring;
+ int ring_size = BIT(ring->order);
int i;
if (!ring->buf)
return;
- for (i = 0; i < ring->size; i++)
- if (ring->buf[i].skb) {
+ for (i = 0; i < ring_size; i++)
+ if (ring->buf[i].rx_buf) {
dma_unmap_single(&ag->dev->dev, ring->buf[i].dma_addr,
- AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE);
- kfree_skb(ring->buf[i].skb);
+ ag->rx_buf_size, DMA_FROM_DEVICE);
+ skb_free_frag(ring->buf[i].rx_buf);
}
}
-struct sk_buff *ag71xx_rx_alloc(struct ag71xx *ag)
+static int ag71xx_buffer_offset(struct ag71xx *ag)
{
+ int offset = NET_SKB_PAD;
+
/*
* On AR71xx/AR91xx packets must be 4-byte aligned.
*
* so we don't need any extra alignment in that case.
*/
if (!ag71xx_get_pdata(ag)->is_ar724x || ag71xx_has_ar8216(ag))
- return netdev_alloc_skb(ag->dev, AG71XX_RX_PKT_SIZE);
+ return offset;
- return netdev_alloc_skb_ip_align(ag->dev, AG71XX_RX_PKT_SIZE);
+ return offset + NET_IP_ALIGN;
}
+static int ag71xx_buffer_size(struct ag71xx *ag)
+{
+ return ag->rx_buf_size +
+ SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+}
+
+static bool ag71xx_fill_rx_buf(struct ag71xx *ag, struct ag71xx_buf *buf,
+ int offset,
+ void *(*alloc)(unsigned int size))
+{
+ struct ag71xx_ring *ring = &ag->rx_ring;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, buf - &ring->buf[0]);
+ void *data;
+
+ data = alloc(ag71xx_buffer_size(ag));
+ if (!data)
+ return false;
+
+ buf->rx_buf = data;
+ buf->dma_addr = dma_map_single(&ag->dev->dev, data, ag->rx_buf_size,
+ DMA_FROM_DEVICE);
+ desc->data = (u32) buf->dma_addr + offset;
+ return true;
+}
static int ag71xx_ring_rx_init(struct ag71xx *ag)
{
struct ag71xx_ring *ring = &ag->rx_ring;
+ int ring_size = BIT(ring->order);
+ int ring_mask = BIT(ring->order) - 1;
unsigned int i;
int ret;
+ int offset = ag71xx_buffer_offset(ag);
ret = 0;
- for (i = 0; i < ring->size; i++) {
- ring->buf[i].desc->next = (u32) (ring->descs_dma +
- ring->desc_size * ((i + 1) % ring->size));
+ for (i = 0; i < ring_size; i++) {
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+
+ desc->next = (u32) (ring->descs_dma +
+ AG71XX_DESC_SIZE * ((i + 1) & ring_mask));
DBG("ag71xx: RX desc at %p, next is %08x\n",
- ring->buf[i].desc,
- ring->buf[i].desc->next);
+ desc, desc->next);
}
- for (i = 0; i < ring->size; i++) {
- struct sk_buff *skb;
- dma_addr_t dma_addr;
+ for (i = 0; i < ring_size; i++) {
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
- skb = ag71xx_rx_alloc(ag);
- if (!skb) {
+ if (!ag71xx_fill_rx_buf(ag, &ring->buf[i], offset,
+ netdev_alloc_frag)) {
ret = -ENOMEM;
break;
}
- skb->dev = ag->dev;
- dma_addr = dma_map_single(&ag->dev->dev, skb->data,
- AG71XX_RX_PKT_SIZE,
- DMA_FROM_DEVICE);
- ring->buf[i].skb = skb;
- ring->buf[i].dma_addr = dma_addr;
- ring->buf[i].desc->data = (u32) dma_addr;
- ring->buf[i].desc->ctrl = DESC_EMPTY;
+ desc->ctrl = DESC_EMPTY;
}
/* flush descriptors */
static int ag71xx_ring_rx_refill(struct ag71xx *ag)
{
struct ag71xx_ring *ring = &ag->rx_ring;
+ int ring_mask = BIT(ring->order) - 1;
unsigned int count;
+ int offset = ag71xx_buffer_offset(ag);
count = 0;
for (; ring->curr - ring->dirty > 0; ring->dirty++) {
+ struct ag71xx_desc *desc;
unsigned int i;
- i = ring->dirty % ring->size;
-
- if (ring->buf[i].skb == NULL) {
- dma_addr_t dma_addr;
- struct sk_buff *skb;
+ i = ring->dirty & ring_mask;
+ desc = ag71xx_ring_desc(ring, i);
- skb = ag71xx_rx_alloc(ag);
- if (skb == NULL)
- break;
-
- skb->dev = ag->dev;
-
- dma_addr = dma_map_single(&ag->dev->dev, skb->data,
- AG71XX_RX_PKT_SIZE,
- DMA_FROM_DEVICE);
-
- ring->buf[i].skb = skb;
- ring->buf[i].dma_addr = dma_addr;
- ring->buf[i].desc->data = (u32) dma_addr;
- }
+ if (!ring->buf[i].rx_buf &&
+ !ag71xx_fill_rx_buf(ag, &ring->buf[i], offset,
+ napi_alloc_frag))
+ break;
- ring->buf[i].desc->ctrl = DESC_EMPTY;
+ desc->ctrl = DESC_EMPTY;
count++;
}
static void ag71xx_hw_setup(struct ag71xx *ag)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+ u32 init = MAC_CFG1_INIT;
/* setup MAC configuration registers */
- ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT);
+ if (pdata->builtin_switch)
+ init |= MAC_CFG1_TFC | MAC_CFG1_RFC;
+ ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, init);
ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
- /* setup max frame length */
- ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN);
+ /* setup max frame length to zero */
+ ag71xx_wr(ag, AG71XX_REG_MAC_MFL, 0);
/* setup FIFO configuration registers */
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
reset_mask &= ~(AR71XX_RESET_GE0_PHY | AR71XX_RESET_GE1_PHY);
ath79_device_reset_set(reset_phy);
- mdelay(50);
+ msleep(50);
ath79_device_reset_clear(reset_phy);
- mdelay(200);
+ msleep(200);
}
ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR);
udelay(20);
ath79_device_reset_set(reset_mask);
- mdelay(100);
+ msleep(100);
ath79_device_reset_clear(reset_mask);
- mdelay(200);
+ msleep(200);
ag71xx_hw_setup(ag);
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
struct net_device *dev = ag->dev;
u32 reset_mask = pdata->reset_bit;
- u32 rx_ds, tx_ds;
+ u32 rx_ds;
u32 mii_reg;
reset_mask &= AR71XX_RESET_GE0_MAC | AR71XX_RESET_GE1_MAC;
+ ag71xx_hw_stop(ag);
+ wmb();
+
mii_reg = ag71xx_rr(ag, AG71XX_REG_MII_CFG);
rx_ds = ag71xx_rr(ag, AG71XX_REG_RX_DESC);
- tx_ds = ag71xx_rr(ag, AG71XX_REG_TX_DESC);
ath79_device_reset_set(reset_mask);
udelay(10);
ag71xx_dma_reset(ag);
ag71xx_hw_setup(ag);
+ ag71xx_tx_packets(ag, true);
+ ag->tx_ring.curr = 0;
+ ag->tx_ring.dirty = 0;
+ netdev_reset_queue(ag->dev);
+
+ /* setup max frame length */
+ ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
+ ag71xx_max_frame_len(ag->dev->mtu));
ag71xx_wr(ag, AG71XX_REG_RX_DESC, rx_ds);
- ag71xx_wr(ag, AG71XX_REG_TX_DESC, tx_ds);
+ ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
ag71xx_wr(ag, AG71XX_REG_MII_CFG, mii_reg);
ag71xx_hw_set_macaddr(ag, dev->dev_addr);
/* enable interrupts */
ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT);
+
+ netif_wake_queue(ag->dev);
}
-void ag71xx_link_adjust(struct ag71xx *ag)
+static void
+__ag71xx_link_adjust(struct ag71xx *ag, bool update)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
u32 cfg2;
u32 ifctl;
u32 fifo5;
+ u32 fifo3;
- if (!ag->link) {
+ if (!ag->link && update) {
ag71xx_hw_stop(ag);
netif_carrier_off(ag->dev);
if (netif_msg_link(ag))
}
if (pdata->is_ar91xx)
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x00780fff);
+ fifo3 = 0x00780fff;
else if (pdata->is_ar724x)
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, pdata->fifo_cfg3);
+ fifo3 = pdata->fifo_cfg3;
else
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x008001ff);
+ fifo3 = 0x008001ff;
+
+ if (ag->tx_ring.desc_split) {
+ fifo3 &= 0xffff;
+ fifo3 |= ((2048 - ag->tx_ring.desc_split) / 4) << 16;
+ }
- if (pdata->set_speed)
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, fifo3);
+
+ if (update && pdata->set_speed)
pdata->set_speed(ag->speed);
ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
ag71xx_hw_start(ag);
netif_carrier_on(ag->dev);
- if (netif_msg_link(ag))
+ if (update && netif_msg_link(ag))
pr_info("%s: link up (%sMbps/%s duplex)\n",
ag->dev->name,
ag71xx_speed_str(ag),
ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL));
}
-static int ag71xx_open(struct net_device *dev)
+void ag71xx_link_adjust(struct ag71xx *ag)
+{
+ __ag71xx_link_adjust(ag, true);
+}
+
+static int ag71xx_hw_enable(struct ag71xx *ag)
{
- struct ag71xx *ag = netdev_priv(dev);
int ret;
ret = ag71xx_rings_init(ag);
if (ret)
- goto err;
+ return ret;
napi_enable(&ag->napi);
-
- netif_carrier_off(dev);
- ag71xx_phy_start(ag);
-
ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->rx_ring.descs_dma);
+ netif_start_queue(ag->dev);
+
+ return 0;
+}
+
+static void ag71xx_hw_disable(struct ag71xx *ag)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ag->lock, flags);
+
+ netif_stop_queue(ag->dev);
+
+ ag71xx_hw_stop(ag);
+ ag71xx_dma_reset(ag);
+
+ napi_disable(&ag->napi);
+ del_timer_sync(&ag->oom_timer);
+
+ spin_unlock_irqrestore(&ag->lock, flags);
+
+ ag71xx_rings_cleanup(ag);
+}
+static int ag71xx_open(struct net_device *dev)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+ unsigned int max_frame_len;
+ int ret;
+
+ netif_carrier_off(dev);
+ max_frame_len = ag71xx_max_frame_len(dev->mtu);
+ ag->rx_buf_size = SKB_DATA_ALIGN(max_frame_len + NET_SKB_PAD + NET_IP_ALIGN);
+
+ /* setup max frame length */
+ ag71xx_wr(ag, AG71XX_REG_MAC_MFL, max_frame_len);
ag71xx_hw_set_macaddr(ag, dev->dev_addr);
- netif_start_queue(dev);
+ ret = ag71xx_hw_enable(ag);
+ if (ret)
+ goto err;
+
+ ag71xx_phy_start(ag);
return 0;
static int ag71xx_stop(struct net_device *dev)
{
struct ag71xx *ag = netdev_priv(dev);
- unsigned long flags;
netif_carrier_off(dev);
ag71xx_phy_stop(ag);
+ ag71xx_hw_disable(ag);
- spin_lock_irqsave(&ag->lock, flags);
+ return 0;
+}
- netif_stop_queue(dev);
+static int ag71xx_fill_dma_desc(struct ag71xx_ring *ring, u32 addr, int len)
+{
+ int i;
+ struct ag71xx_desc *desc;
+ int ring_mask = BIT(ring->order) - 1;
+ int ndesc = 0;
+ int split = ring->desc_split;
- ag71xx_hw_stop(ag);
- ag71xx_dma_reset(ag);
+ if (!split)
+ split = len;
- napi_disable(&ag->napi);
- del_timer_sync(&ag->oom_timer);
+ while (len > 0) {
+ unsigned int cur_len = len;
- spin_unlock_irqrestore(&ag->lock, flags);
+ i = (ring->curr + ndesc) & ring_mask;
+ desc = ag71xx_ring_desc(ring, i);
- ag71xx_rings_cleanup(ag);
+ if (!ag71xx_desc_empty(desc))
+ return -1;
- return 0;
+ if (cur_len > split) {
+ cur_len = split;
+
+ /*
+ * TX will hang if DMA transfers <= 4 bytes,
+ * make sure next segment is more than 4 bytes long.
+ */
+ if (len <= split + 4)
+ cur_len -= 4;
+ }
+
+ desc->data = addr;
+ addr += cur_len;
+ len -= cur_len;
+
+ if (len > 0)
+ cur_len |= DESC_MORE;
+
+ /* prevent early tx attempt of this descriptor */
+ if (!ndesc)
+ cur_len |= DESC_EMPTY;
+
+ desc->ctrl = cur_len;
+ ndesc++;
+ }
+
+ return ndesc;
}
static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,
{
struct ag71xx *ag = netdev_priv(dev);
struct ag71xx_ring *ring = &ag->tx_ring;
+ int ring_mask = BIT(ring->order) - 1;
+ int ring_size = BIT(ring->order);
struct ag71xx_desc *desc;
dma_addr_t dma_addr;
- int i;
-
- i = ring->curr % ring->size;
- desc = ring->buf[i].desc;
-
- if (!ag71xx_desc_empty(desc))
- goto err_drop;
+ int i, n, ring_min;
if (ag71xx_has_ar8216(ag))
ag71xx_add_ar8216_header(ag, skb);
- if (skb->len <= 0) {
+ if (skb->len <= 4) {
DBG("%s: packet len is too small\n", ag->dev->name);
goto err_drop;
}
dma_addr = dma_map_single(&dev->dev, skb->data, skb->len,
DMA_TO_DEVICE);
- netdev_sent_queue(dev, skb->len);
+ i = ring->curr & ring_mask;
+ desc = ag71xx_ring_desc(ring, i);
+
+ /* setup descriptor fields */
+ n = ag71xx_fill_dma_desc(ring, (u32) dma_addr, skb->len & ag->desc_pktlen_mask);
+ if (n < 0)
+ goto err_drop_unmap;
+
+ i = (ring->curr + n - 1) & ring_mask;
+ ring->buf[i].len = skb->len;
ring->buf[i].skb = skb;
ring->buf[i].timestamp = jiffies;
- /* setup descriptor fields */
- desc->data = (u32) dma_addr;
- desc->ctrl = (skb->len & DESC_PKTLEN_M);
+ netdev_sent_queue(dev, skb->len);
+
+ desc->ctrl &= ~DESC_EMPTY;
+ ring->curr += n;
/* flush descriptor */
wmb();
- ring->curr++;
- if (ring->curr == (ring->dirty + ring->size)) {
- DBG("%s: tx queue full\n", ag->dev->name);
+ ring_min = 2;
+ if (ring->desc_split)
+ ring_min *= AG71XX_TX_RING_DS_PER_PKT;
+
+ if (ring->curr - ring->dirty >= ring_size - ring_min) {
+ DBG("%s: tx queue full\n", dev->name);
netif_stop_queue(dev);
}
return NETDEV_TX_OK;
+err_drop_unmap:
+ dma_unmap_single(&dev->dev, dma_addr, skb->len, DMA_TO_DEVICE);
+
err_drop:
dev->stats.tx_dropped++;
if (netif_msg_tx_err(ag))
pr_info("%s: tx timeout\n", ag->dev->name);
- schedule_work(&ag->restart_work);
+ schedule_delayed_work(&ag->restart_work, 1);
}
static void ag71xx_restart_work_func(struct work_struct *work)
{
- struct ag71xx *ag = container_of(work, struct ag71xx, restart_work);
-
- if (ag71xx_get_pdata(ag)->is_ar724x) {
- ag->link = 0;
- ag71xx_link_adjust(ag);
- return;
- }
-
- ag71xx_stop(ag->dev);
- ag71xx_open(ag->dev);
+ struct ag71xx *ag = container_of(work, struct ag71xx, restart_work.work);
+
+ rtnl_lock();
+ ag71xx_hw_disable(ag);
+ ag71xx_hw_enable(ag);
+ if (ag->link)
+ __ag71xx_link_adjust(ag, false);
+ rtnl_unlock();
}
static bool ag71xx_check_dma_stuck(struct ag71xx *ag, unsigned long timestamp)
return false;
}
-static int ag71xx_tx_packets(struct ag71xx *ag)
+static int ag71xx_tx_packets(struct ag71xx *ag, bool flush)
{
struct ag71xx_ring *ring = &ag->tx_ring;
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+ int ring_mask = BIT(ring->order) - 1;
+ int ring_size = BIT(ring->order);
int sent = 0;
int bytes_compl = 0;
+ int n = 0;
DBG("%s: processing TX ring\n", ag->dev->name);
- while (ring->dirty != ring->curr) {
- unsigned int i = ring->dirty % ring->size;
- struct ag71xx_desc *desc = ring->buf[i].desc;
+ while (ring->dirty + n != ring->curr) {
+ unsigned int i = (ring->dirty + n) & ring_mask;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
struct sk_buff *skb = ring->buf[i].skb;
- if (!ag71xx_desc_empty(desc)) {
- if (pdata->is_ar7240 &&
+ if (!flush && !ag71xx_desc_empty(desc)) {
+ if (pdata->is_ar724x &&
ag71xx_check_dma_stuck(ag, ring->buf[i].timestamp))
- schedule_work(&ag->restart_work);
+ schedule_delayed_work(&ag->restart_work, HZ / 2);
break;
}
- ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
+ if (flush)
+ desc->ctrl |= DESC_EMPTY;
- bytes_compl += skb->len;
- ag->dev->stats.tx_bytes += skb->len;
- ag->dev->stats.tx_packets++;
+ n++;
+ if (!skb)
+ continue;
dev_kfree_skb_any(skb);
ring->buf[i].skb = NULL;
- ring->dirty++;
+ bytes_compl += ring->buf[i].len;
+
sent++;
+ ring->dirty += n;
+
+ while (n > 0) {
+ ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
+ n--;
+ }
}
DBG("%s: %d packets sent out\n", ag->dev->name, sent);
+ ag->dev->stats.tx_bytes += bytes_compl;
+ ag->dev->stats.tx_packets += sent;
+
+ if (!sent)
+ return 0;
+
netdev_completed_queue(ag->dev, sent, bytes_compl);
- if ((ring->curr - ring->dirty) < (ring->size * 3) / 4)
+ if ((ring->curr - ring->dirty) < (ring_size * 3) / 4)
netif_wake_queue(ag->dev);
+ cancel_delayed_work(&ag->restart_work);
return sent;
}
{
struct net_device *dev = ag->dev;
struct ag71xx_ring *ring = &ag->rx_ring;
+ int offset = ag71xx_buffer_offset(ag);
+ unsigned int pktlen_mask = ag->desc_pktlen_mask;
+ int ring_mask = BIT(ring->order) - 1;
+ int ring_size = BIT(ring->order);
+ struct sk_buff_head queue;
+ struct sk_buff *skb;
int done = 0;
DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n",
dev->name, limit, ring->curr, ring->dirty);
+ skb_queue_head_init(&queue);
+
while (done < limit) {
- unsigned int i = ring->curr % ring->size;
- struct ag71xx_desc *desc = ring->buf[i].desc;
- struct sk_buff *skb;
+ unsigned int i = ring->curr & ring_mask;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
int pktlen;
int err = 0;
if (ag71xx_desc_empty(desc))
break;
- if ((ring->dirty + ring->size) == ring->curr) {
+ if ((ring->dirty + ring_size) == ring->curr) {
ag71xx_assert(0);
break;
}
ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
- skb = ring->buf[i].skb;
- pktlen = ag71xx_desc_pktlen(desc);
+ pktlen = desc->ctrl & pktlen_mask;
pktlen -= ETH_FCS_LEN;
dma_unmap_single(&dev->dev, ring->buf[i].dma_addr,
- AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE);
+ ag->rx_buf_size, DMA_FROM_DEVICE);
- dev->last_rx = jiffies;
dev->stats.rx_packets++;
dev->stats.rx_bytes += pktlen;
+ skb = build_skb(ring->buf[i].rx_buf, ag71xx_buffer_size(ag));
+ if (!skb) {
+ skb_free_frag(ring->buf[i].rx_buf);
+ goto next;
+ }
+
+ skb_reserve(skb, offset);
skb_put(skb, pktlen);
+
if (ag71xx_has_ar8216(ag))
err = ag71xx_remove_ar8216_header(ag, skb, pktlen);
} else {
skb->dev = dev;
skb->ip_summed = CHECKSUM_NONE;
- skb->protocol = eth_type_trans(skb, dev);
- netif_receive_skb(skb);
+ __skb_queue_tail(&queue, skb);
}
- ring->buf[i].skb = NULL;
+next:
+ ring->buf[i].rx_buf = NULL;
done++;
ring->curr++;
ag71xx_ring_rx_refill(ag);
+ while ((skb = __skb_dequeue(&queue)) != NULL) {
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_receive_skb(skb);
+ }
+
DBG("%s: rx finish, curr=%u, dirty=%u, done=%d\n",
dev->name, ring->curr, ring->dirty, done);
struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
struct net_device *dev = ag->dev;
- struct ag71xx_ring *rx_ring;
+ struct ag71xx_ring *rx_ring = &ag->rx_ring;
+ int rx_ring_size = BIT(rx_ring->order);
unsigned long flags;
u32 status;
int tx_done;
int rx_done;
pdata->ddr_flush();
- tx_done = ag71xx_tx_packets(ag);
+ tx_done = ag71xx_tx_packets(ag, false);
DBG("%s: processing RX ring\n", dev->name);
rx_done = ag71xx_rx_packets(ag, limit);
ag71xx_debugfs_update_napi_stats(ag, rx_done, tx_done);
- rx_ring = &ag->rx_ring;
- if (rx_ring->buf[rx_ring->dirty % rx_ring->size].skb == NULL)
+ if (rx_ring->buf[rx_ring->dirty % rx_ring_size].rx_buf == NULL)
goto oom;
status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
more:
DBG("%s: stay in polling mode, rx=%d, tx=%d, limit=%d\n",
dev->name, rx_done, tx_done, limit);
- return rx_done;
+ return limit;
oom:
if (netif_msg_rx_err(ag))
}
#endif
+static int ag71xx_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+ unsigned int max_frame_len;
+
+ max_frame_len = ag71xx_max_frame_len(new_mtu);
+ if (new_mtu < 68 || max_frame_len > ag->max_frame_len)
+ return -EINVAL;
+
+ if (netif_running(dev))
+ return -EBUSY;
+
+ dev->mtu = new_mtu;
+ return 0;
+}
+
static const struct net_device_ops ag71xx_netdev_ops = {
.ndo_open = ag71xx_open,
.ndo_stop = ag71xx_stop,
.ndo_start_xmit = ag71xx_hard_start_xmit,
.ndo_do_ioctl = ag71xx_do_ioctl,
.ndo_tx_timeout = ag71xx_tx_timeout,
- .ndo_change_mtu = eth_change_mtu,
+ .ndo_change_mtu = ag71xx_change_mtu,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
#endif
};
-static int __devinit ag71xx_probe(struct platform_device *pdev)
+static const char *ag71xx_get_phy_if_mode_name(phy_interface_t mode)
+{
+ switch (mode) {
+ case PHY_INTERFACE_MODE_MII:
+ return "MII";
+ case PHY_INTERFACE_MODE_GMII:
+ return "GMII";
+ case PHY_INTERFACE_MODE_RMII:
+ return "RMII";
+ case PHY_INTERFACE_MODE_RGMII:
+ return "RGMII";
+ case PHY_INTERFACE_MODE_SGMII:
+ return "SGMII";
+ default:
+ break;
+ }
+
+ return "unknown";
+}
+
+
+static int ag71xx_probe(struct platform_device *pdev)
{
struct net_device *dev;
struct resource *res;
struct ag71xx *ag;
struct ag71xx_platform_data *pdata;
- int err;
+ int tx_size, err;
pdata = pdev->dev.platform_data;
if (!pdata) {
goto err_out;
}
- if (pdata->mii_bus_dev == NULL) {
+ if (pdata->mii_bus_dev == NULL && pdata->phy_mask) {
dev_err(&pdev->dev, "no MII bus device specified\n");
err = -EINVAL;
goto err_out;
goto err_out;
}
+ if (!pdata->max_frame_len || !pdata->desc_pktlen_mask)
+ return -EINVAL;
+
SET_NETDEV_DEV(dev, &pdev->dev);
ag = netdev_priv(dev);
dev->irq = platform_get_irq(pdev, 0);
err = request_irq(dev->irq, ag71xx_interrupt,
- IRQF_DISABLED,
+ 0x0,
dev->name, dev);
if (err) {
dev_err(&pdev->dev, "unable to request IRQ %d\n", dev->irq);
dev->netdev_ops = &ag71xx_netdev_ops;
dev->ethtool_ops = &ag71xx_ethtool_ops;
- INIT_WORK(&ag->restart_work, ag71xx_restart_work_func);
+ INIT_DELAYED_WORK(&ag->restart_work, ag71xx_restart_work_func);
init_timer(&ag->oom_timer);
ag->oom_timer.data = (unsigned long) dev;
ag->oom_timer.function = ag71xx_oom_timer_handler;
- ag->tx_ring.size = AG71XX_TX_RING_SIZE_DEFAULT;
- ag->rx_ring.size = AG71XX_RX_RING_SIZE_DEFAULT;
+ tx_size = AG71XX_TX_RING_SIZE_DEFAULT;
+ ag->rx_ring.order = ag71xx_ring_size_order(AG71XX_RX_RING_SIZE_DEFAULT);
+
+ ag->max_frame_len = pdata->max_frame_len;
+ ag->desc_pktlen_mask = pdata->desc_pktlen_mask;
+
+ if (!pdata->is_ar724x && !pdata->is_ar91xx) {
+ ag->tx_ring.desc_split = AG71XX_TX_RING_SPLIT;
+ tx_size *= AG71XX_TX_RING_DS_PER_PKT;
+ }
+ ag->tx_ring.order = ag71xx_ring_size_order(tx_size);
ag->stop_desc = dma_alloc_coherent(NULL,
sizeof(struct ag71xx_desc), &ag->stop_desc_dma, GFP_KERNEL);
netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
- err = register_netdev(dev);
- if (err) {
- dev_err(&pdev->dev, "unable to register net device\n");
- goto err_free_desc;
- }
-
- pr_info("%s: Atheros AG71xx at 0x%08lx, irq %d\n",
- dev->name, dev->base_addr, dev->irq);
-
ag71xx_dump_regs(ag);
ag71xx_hw_init(ag);
err = ag71xx_phy_connect(ag);
if (err)
- goto err_unregister_netdev;
+ goto err_free_desc;
err = ag71xx_debugfs_init(ag);
if (err)
platform_set_drvdata(pdev, dev);
+ err = register_netdev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "unable to register net device\n");
+ goto err_debugfs_exit;
+ }
+
+ pr_info("%s: Atheros AG71xx at 0x%08lx, irq %d, mode:%s\n",
+ dev->name, dev->base_addr, dev->irq,
+ ag71xx_get_phy_if_mode_name(pdata->phy_if_mode));
+
return 0;
+err_debugfs_exit:
+ ag71xx_debugfs_exit(ag);
err_phy_disconnect:
ag71xx_phy_disconnect(ag);
-err_unregister_netdev:
- unregister_netdev(dev);
err_free_desc:
dma_free_coherent(NULL, sizeof(struct ag71xx_desc), ag->stop_desc,
ag->stop_desc_dma);
return err;
}
-static int __devexit ag71xx_remove(struct platform_device *pdev)
+static int ag71xx_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
static struct platform_driver ag71xx_driver = {
.probe = ag71xx_probe,
- .remove = __exit_p(ag71xx_remove),
+ .remove = ag71xx_remove,
.driver = {
.name = AG71XX_DRV_NAME,
}
projects / openwrt / staging / lynxis / omap.git / blobdiff