void e1000_down(struct e1000_adapter *adapter)
{
+ struct e1000_hw *hw = &adapter->hw;
struct net_device *netdev = adapter->netdev;
+ u32 rctl, tctl;
/* signal that we're down so the interrupt handler does not
* reschedule our watchdog timer */
set_bit(__E1000_DOWN, &adapter->flags);
+ /* disable receives in the hardware */
+ rctl = er32(RCTL);
+ ew32(RCTL, rctl & ~E1000_RCTL_EN);
+ /* flush and sleep below */
+
+ /* can be netif_tx_disable when NETIF_F_LLTX is removed */
+ netif_stop_queue(netdev);
+
+ /* disable transmits in the hardware */
+ tctl = er32(TCTL);
+ tctl &= ~E1000_TCTL_EN;
+ ew32(TCTL, tctl);
+ /* flush both disables and wait for them to finish */
+ E1000_WRITE_FLUSH();
+ msleep(10);
+
napi_disable(&adapter->napi);
e1000_irq_disable(adapter);
adapter->link_speed = 0;
adapter->link_duplex = 0;
netif_carrier_off(netdev);
- netif_stop_queue(netdev);
e1000_reset(adapter);
e1000_clean_all_tx_rings(adapter);
dev_kfree_skb_any(buffer_info->skb);
buffer_info->skb = NULL;
}
+ buffer_info->time_stamp = 0;
/* buffer_info must be completely set up in the transmit path */
}
unsigned int mss)
{
struct e1000_hw *hw = &adapter->hw;
+ struct e1000_buffer *buffer_info;
unsigned int len = skb_headlen(skb);
unsigned int offset, size, count = 0, i;
unsigned int f;
- dma_addr_t map;
+ dma_addr_t *map;
i = tx_ring->next_to_use;
if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
- dev_kfree_skb(skb);
- return -2;
+ return 0;
}
- map = skb_shinfo(skb)->dma_maps[0];
+ map = skb_shinfo(skb)->dma_maps;
offset = 0;
while (len) {
- struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
+ buffer_info = &tx_ring->buffer_info[i];
size = min(len, max_per_txd);
/* Workaround for Controller erratum --
* descriptor for non-tso packet in a linear SKB that follows a
size -= 4;
buffer_info->length = size;
- buffer_info->dma = map + offset;
+ buffer_info->dma = map[0] + offset;
buffer_info->time_stamp = jiffies;
buffer_info->next_to_watch = i;
len -= size;
offset += size;
count++;
- if (unlikely(++i == tx_ring->count)) i = 0;
+ if (len) {
+ i++;
+ if (unlikely(i == tx_ring->count))
+ i = 0;
+ }
}
for (f = 0; f < nr_frags; f++) {
frag = &skb_shinfo(skb)->frags[f];
len = frag->size;
- map = skb_shinfo(skb)->dma_maps[f + 1];
offset = 0;
while (len) {
- struct e1000_buffer *buffer_info;
+ i++;
+ if (unlikely(i == tx_ring->count))
+ i = 0;
+
buffer_info = &tx_ring->buffer_info[i];
size = min(len, max_per_txd);
/* Workaround for premature desc write-backs
size -= 4;
buffer_info->length = size;
- buffer_info->dma = map + offset;
+ buffer_info->dma = map[f + 1] + offset;
buffer_info->time_stamp = jiffies;
buffer_info->next_to_watch = i;
len -= size;
offset += size;
count++;
- if (unlikely(++i == tx_ring->count)) i = 0;
}
}
- i = (i == 0) ? tx_ring->count - 1 : i - 1;
tx_ring->buffer_info[i].skb = skb;
tx_ring->buffer_info[first].next_to_watch = i;
- smp_wmb();
return count;
}
if (likely(skb->protocol == htons(ETH_P_IP)))
tx_flags |= E1000_TX_FLAGS_IPV4;
- e1000_tx_queue(adapter, tx_ring, tx_flags,
- e1000_tx_map(adapter, tx_ring, skb, first,
- max_per_txd, nr_frags, mss));
+ count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
+ nr_frags, mss);
- netdev->trans_start = jiffies;
+ if (count) {
+ e1000_tx_queue(adapter, tx_ring, tx_flags, count);
+ netdev->trans_start = jiffies;
+ /* Make sure there is space in the ring for the next send. */
+ e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
- /* Make sure there is space in the ring for the next send. */
- e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
+ } else {
+ dev_kfree_skb_any(skb);
+ tx_ring->buffer_info[first].time_stamp = 0;
+ tx_ring->next_to_use = first;
+ }
return NETDEV_TX_OK;
}
adapter->total_rx_bytes = 0;
adapter->total_rx_packets = 0;
__napi_schedule(&adapter->napi);
- } else
+ } else {
/* this really should not happen! if it does it is basically a
* bug, but not a hard error, so enable ints and continue */
- e1000_irq_enable(adapter);
+ if (!test_bit(__E1000_DOWN, &adapter->flags))
+ e1000_irq_enable(adapter);
+ }
return IRQ_HANDLED;
}
adapter->clean_rx(adapter, &adapter->rx_ring[0],
&work_done, budget);
- if (tx_cleaned)
+ if (!tx_cleaned)
work_done = budget;
/* If budget not fully consumed, exit the polling mode */
if (likely(adapter->itr_setting & 3))
e1000_set_itr(adapter);
napi_complete(napi);
- e1000_irq_enable(adapter);
+ if (!test_bit(__E1000_DOWN, &adapter->flags))
+ e1000_irq_enable(adapter);
}
return work_done;
struct e1000_buffer *buffer_info;
unsigned int i, eop;
unsigned int count = 0;
- bool cleaned = false;
+ bool cleaned;
unsigned int total_tx_bytes=0, total_tx_packets=0;
i = tx_ring->next_to_clean;
eop = tx_ring->buffer_info[i].next_to_watch;
eop_desc = E1000_TX_DESC(*tx_ring, eop);
- while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
- for (cleaned = false; !cleaned; ) {
+ while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
+ (count < tx_ring->count)) {
+ for (cleaned = false; !cleaned; count++) {
tx_desc = E1000_TX_DESC(*tx_ring, i);
buffer_info = &tx_ring->buffer_info[i];
cleaned = (i == eop);
eop = tx_ring->buffer_info[i].next_to_watch;
eop_desc = E1000_TX_DESC(*tx_ring, eop);
-#define E1000_TX_WEIGHT 64
- /* weight of a sort for tx, to avoid endless transmit cleanup */
- if (count++ == E1000_TX_WEIGHT)
- break;
}
tx_ring->next_to_clean = i;
/* Detect a transmit hang in hardware, this serializes the
* check with the clearing of time_stamp and movement of i */
adapter->detect_tx_hung = false;
- /*
- * read barrier to make sure that the ->dma member and time
- * stamp are updated fully
- */
- smp_rmb();
- if (tx_ring->buffer_info[eop].dma &&
- time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
+ if (tx_ring->buffer_info[i].time_stamp &&
+ time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
(adapter->tx_timeout_factor * HZ))
&& !(er32(STATUS) & E1000_STATUS_TXOFF)) {
readl(hw->hw_addr + tx_ring->tdt),
tx_ring->next_to_use,
tx_ring->next_to_clean,
- tx_ring->buffer_info[eop].time_stamp,
+ tx_ring->buffer_info[i].time_stamp,
eop,
jiffies,
eop_desc->upper.fields.status);
adapter->total_tx_packets += total_tx_packets;
adapter->net_stats.tx_bytes += total_tx_bytes;
adapter->net_stats.tx_packets += total_tx_packets;
- return cleaned;
+ return (count < tx_ring->count);
}
/**
projects / mv-sheeva.git / blobdiff