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yaml
---
r: 22344
b: refs/heads/master
c: 00a6cae
h: refs/heads/master
v: v3
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Stephen Hemminger authored and Jeff Garzik committed Mar 21, 2006
1 parent ff4ad57 commit 2fd1487
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Showing 2 changed files with 45 additions and 56 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: ec1248e70edc5cf7b485efcc7b41e44e10f422e5
refs/heads/master: 00a6cae288138ce0444ab6f48a81da12afe557aa
99 changes: 44 additions & 55 deletions trunk/drivers/net/skge.c
Original file line number Diff line number Diff line change
Expand Up @@ -2307,16 +2307,13 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
int i;
u32 control, len;
u64 map;
unsigned long flags;

skb = skb_padto(skb, ETH_ZLEN);
if (!skb)
return NETDEV_TX_OK;

local_irq_save(flags);
if (!spin_trylock(&skge->tx_lock)) {
/* Collision - tell upper layer to requeue */
local_irq_restore(flags);
return NETDEV_TX_LOCKED;
}

Expand All @@ -2327,7 +2324,7 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
printk(KERN_WARNING PFX "%s: ring full when queue awake!\n",
dev->name);
}
spin_unlock_irqrestore(&skge->tx_lock, flags);
spin_unlock(&skge->tx_lock);
return NETDEV_TX_BUSY;
}

Expand Down Expand Up @@ -2403,7 +2400,7 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
}

dev->trans_start = jiffies;
spin_unlock_irqrestore(&skge->tx_lock, flags);
spin_unlock(&skge->tx_lock);

return NETDEV_TX_OK;
}
Expand All @@ -2416,7 +2413,7 @@ static inline void skge_tx_free(struct skge_hw *hw, struct skge_element *e)
pci_unmap_addr(e, mapaddr),
pci_unmap_len(e, maplen),
PCI_DMA_TODEVICE);
dev_kfree_skb_any(e->skb);
dev_kfree_skb(e->skb);
e->skb = NULL;
} else {
pci_unmap_page(hw->pdev,
Expand All @@ -2430,15 +2427,14 @@ static void skge_tx_clean(struct skge_port *skge)
{
struct skge_ring *ring = &skge->tx_ring;
struct skge_element *e;
unsigned long flags;

spin_lock_irqsave(&skge->tx_lock, flags);
spin_lock_bh(&skge->tx_lock);
for (e = ring->to_clean; e != ring->to_use; e = e->next) {
++skge->tx_avail;
skge_tx_free(skge->hw, e);
}
ring->to_clean = e;
spin_unlock_irqrestore(&skge->tx_lock, flags);
spin_unlock_bh(&skge->tx_lock);
}

static void skge_tx_timeout(struct net_device *dev)
Expand Down Expand Up @@ -2663,15 +2659,48 @@ static inline struct sk_buff *skge_rx_get(struct skge_port *skge,
return NULL;
}

static void skge_tx_done(struct skge_port *skge)
{
struct skge_ring *ring = &skge->tx_ring;
struct skge_element *e;

spin_lock(&skge->tx_lock);
for (e = ring->to_clean; prefetch(e->next), e != ring->to_use; e = e->next) {
struct skge_tx_desc *td = e->desc;
u32 control;

rmb();
control = td->control;
if (control & BMU_OWN)
break;

if (unlikely(netif_msg_tx_done(skge)))
printk(KERN_DEBUG PFX "%s: tx done slot %td status 0x%x\n",
skge->netdev->name, e - ring->start, td->status);

skge_tx_free(skge->hw, e);
e->skb = NULL;
++skge->tx_avail;
}
ring->to_clean = e;
skge_write8(skge->hw, Q_ADDR(txqaddr[skge->port], Q_CSR), CSR_IRQ_CL_F);

if (skge->tx_avail > MAX_SKB_FRAGS + 1)
netif_wake_queue(skge->netdev);

spin_unlock(&skge->tx_lock);
}

static int skge_poll(struct net_device *dev, int *budget)
{
struct skge_port *skge = netdev_priv(dev);
struct skge_hw *hw = skge->hw;
struct skge_ring *ring = &skge->rx_ring;
struct skge_element *e;
unsigned int to_do = min(dev->quota, *budget);
unsigned int work_done = 0;
int to_do = min(dev->quota, *budget);
int work_done = 0;

skge_tx_done(skge);

for (e = ring->to_clean; prefetch(e->next), work_done < to_do; e = e->next) {
struct skge_rx_desc *rd = e->desc;
Expand Down Expand Up @@ -2714,40 +2743,6 @@ static int skge_poll(struct net_device *dev, int *budget)
return 0;
}

static inline void skge_tx_intr(struct net_device *dev)
{
struct skge_port *skge = netdev_priv(dev);
struct skge_hw *hw = skge->hw;
struct skge_ring *ring = &skge->tx_ring;
struct skge_element *e;

spin_lock(&skge->tx_lock);
for (e = ring->to_clean; prefetch(e->next), e != ring->to_use; e = e->next) {
struct skge_tx_desc *td = e->desc;
u32 control;

rmb();
control = td->control;
if (control & BMU_OWN)
break;

if (unlikely(netif_msg_tx_done(skge)))
printk(KERN_DEBUG PFX "%s: tx done slot %td status 0x%x\n",
dev->name, e - ring->start, td->status);

skge_tx_free(hw, e);
e->skb = NULL;
++skge->tx_avail;
}
ring->to_clean = e;
skge_write8(hw, Q_ADDR(txqaddr[skge->port], Q_CSR), CSR_IRQ_CL_F);

if (skge->tx_avail > MAX_SKB_FRAGS + 1)
netif_wake_queue(dev);

spin_unlock(&skge->tx_lock);
}

/* Parity errors seem to happen when Genesis is connected to a switch
* with no other ports present. Heartbeat error??
*/
Expand Down Expand Up @@ -2884,24 +2879,18 @@ static irqreturn_t skge_intr(int irq, void *dev_id, struct pt_regs *regs)
return IRQ_NONE;

spin_lock(&hw->hw_lock);
if (status & IS_R1_F) {
if (status & (IS_R1_F|IS_XA1_F)) {
skge_write8(hw, Q_ADDR(Q_R1, Q_CSR), CSR_IRQ_CL_F);
hw->intr_mask &= ~IS_R1_F;
hw->intr_mask &= ~(IS_R1_F|IS_XA1_F);
netif_rx_schedule(hw->dev[0]);
}

if (status & IS_R2_F) {
if (status & (IS_R2_F|IS_XA2_F)) {
skge_write8(hw, Q_ADDR(Q_R2, Q_CSR), CSR_IRQ_CL_F);
hw->intr_mask &= ~IS_R2_F;
hw->intr_mask &= ~(IS_R2_F|IS_XA2_F);
netif_rx_schedule(hw->dev[1]);
}

if (status & IS_XA1_F)
skge_tx_intr(hw->dev[0]);

if (status & IS_XA2_F)
skge_tx_intr(hw->dev[1]);

if (status & IS_PA_TO_RX1) {
struct skge_port *skge = netdev_priv(hw->dev[0]);
++skge->net_stats.rx_over_errors;
Expand Down

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