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 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 int ag71xx_ring_alloc(struct ag71xx_ring *ring)
{
int err;
- int i;
ring->desc_size = sizeof(struct ag71xx_desc);
if (ring->desc_size % cache_line_size()) {
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:
u32 bytes_compl = 0, pkts_compl = 0;
while (ring->curr != ring->dirty) {
+ struct ag71xx_desc *desc;
u32 i = ring->dirty % ring->size;
- 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);
}
int i;
for (i = 0; i < ring->size; i++) {
- ring->buf[i].desc->next = (u32) (ring->descs_dma +
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+
+ desc->next = (u32) (ring->descs_dma +
ring->desc_size * ((i + 1) % ring->size));
- ring->buf[i].desc->ctrl = DESC_EMPTY;
+ desc->ctrl = DESC_EMPTY;
ring->buf[i].skb = NULL;
}
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_BUF_SIZE, DMA_FROM_DEVICE);
+ ag->rx_buf_size, DMA_FROM_DEVICE);
kfree(ring->buf[i].rx_buf);
}
}
static bool ag71xx_fill_rx_buf(struct ag71xx *ag, struct ag71xx_buf *buf,
int offset)
{
+ struct ag71xx_ring *ring = &ag->rx_ring;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, buf - &ring->buf[0]);
void *data;
- data = kmalloc(AG71XX_RX_BUF_SIZE +
+ data = kmalloc(ag->rx_buf_size +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
GFP_ATOMIC);
if (!data)
return false;
buf->rx_buf = data;
- buf->dma_addr = dma_map_single(&ag->dev->dev, data,
- AG71XX_RX_BUF_SIZE, DMA_FROM_DEVICE);
- buf->desc->data = (u32) buf->dma_addr + offset;
+ 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;
}
ret = 0;
for (i = 0; i < ring->size; i++) {
- ring->buf[i].desc->next = (u32) (ring->descs_dma +
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+
+ desc->next = (u32) (ring->descs_dma +
ring->desc_size * ((i + 1) % ring->size));
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 ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+
if (!ag71xx_fill_rx_buf(ag, &ring->buf[i], offset)) {
ret = -ENOMEM;
break;
}
- ring->buf[i].desc->ctrl = DESC_EMPTY;
+ desc->ctrl = DESC_EMPTY;
}
/* flush descriptors */
count = 0;
for (; ring->curr - ring->dirty > 0; ring->dirty++) {
+ struct ag71xx_desc *desc;
unsigned int i;
i = ring->dirty % ring->size;
+ desc = ag71xx_ring_desc(ring, i);
if (!ring->buf[i].rx_buf &&
!ag71xx_fill_rx_buf(ag, &ring->buf[i], offset))
break;
- ring->buf[i].desc->ctrl = DESC_EMPTY;
+ desc->ctrl = DESC_EMPTY;
count++;
}
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);
ag71xx_dma_reset(ag);
ag71xx_hw_setup(ag);
+ /* 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_MII_CFG, mii_reg);
u32 cfg2;
u32 ifctl;
u32 fifo5;
+ u32 fifo3;
if (!ag->link) {
ag71xx_hw_stop(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;
+ }
+
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, fifo3);
if (pdata->set_speed)
pdata->set_speed(ag->speed);
static int ag71xx_open(struct net_device *dev)
{
struct ag71xx *ag = netdev_priv(dev);
+ unsigned int max_frame_len;
int ret;
+ max_frame_len = ag71xx_max_frame_len(dev->mtu);
+ ag->rx_buf_size = max_frame_len + NET_SKB_PAD + NET_IP_ALIGN;
+
+ /* setup max frame length */
+ ag71xx_wr(ag, AG71XX_REG_MAC_MFL, max_frame_len);
+
ret = ag71xx_rings_init(ag);
if (ret)
goto err;
return 0;
}
+static int ag71xx_fill_dma_desc(struct ag71xx_ring *ring, u32 addr, int len)
+{
+ int i;
+ struct ag71xx_desc *desc;
+ int ndesc = 0;
+ int split = ring->desc_split;
+
+ if (!split)
+ split = len;
+
+ while (len > 0) {
+ unsigned int cur_len = len;
+
+ i = (ring->curr + ndesc) % ring->size;
+ desc = ag71xx_ring_desc(ring, i);
+
+ if (!ag71xx_desc_empty(desc))
+ return -1;
+
+ 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 net_device *dev)
{
struct ag71xx_ring *ring = &ag->tx_ring;
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->size;
+ 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->size;
+ 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++;
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
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->size;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
struct sk_buff *skb = ring->buf[i].skb;
if (!ag71xx_desc_empty(desc)) {
break;
}
- ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
-
- 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)
netif_wake_queue(ag->dev);
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 done = 0;
DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n",
while (done < limit) {
unsigned int i = ring->curr % ring->size;
- struct ag71xx_desc *desc = ring->buf[i].desc;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
struct sk_buff *skb;
int pktlen;
int err = 0;
ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
- 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_BUF_SIZE, DMA_FROM_DEVICE);
+ ag->rx_buf_size, DMA_FROM_DEVICE);
- dev->last_rx = jiffies;
dev->stats.rx_packets++;
dev->stats.rx_bytes += pktlen;
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))
static int ag71xx_change_mtu(struct net_device *dev, int new_mtu)
{
- if (new_mtu < 68 ||
- new_mtu > AG71XX_TX_MTU_LEN - ETH_HLEN - ETH_FCS_LEN)
+ 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 = {
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);
ag->tx_ring.size = AG71XX_TX_RING_SIZE_DEFAULT;
ag->rx_ring.size = 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;
+ ag->tx_ring.size *= AG71XX_TX_RING_DS_PER_PKT;
+ }
+
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, mode:%s\n",
- dev->name, dev->base_addr, dev->irq,
- ag71xx_get_phy_if_mode_name(pdata->phy_if_mode));
-
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);
projects / openwrt / openwrt.git / blobdiff