[PATCH] sky2: transmit complete index optimization
Change transmit complete handling to use the status values in the poll list because they are in-cache, rather than reading non-cached memory for chips status. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
parent
0e3ff6aab1
commit
13b97b74b9
1 changed files with 19 additions and 16 deletions
|
@ -1274,7 +1274,7 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
|
|||
}
|
||||
|
||||
/* Cleanup all untransmitted buffers, assume transmitter not running */
|
||||
static inline void sky2_tx_clean(struct sky2_port *sky2)
|
||||
static void sky2_tx_clean(struct sky2_port *sky2)
|
||||
{
|
||||
sky2_tx_complete(sky2, sky2->tx_prod);
|
||||
}
|
||||
|
@ -1714,14 +1714,16 @@ static struct sk_buff *sky2_receive(struct sky2_port *sky2,
|
|||
/*
|
||||
* Check for transmit complete
|
||||
*/
|
||||
static inline void sky2_tx_check(struct sky2_hw *hw, int port)
|
||||
{
|
||||
struct net_device *dev = hw->dev[port];
|
||||
#define TX_NO_STATUS 0xffff
|
||||
|
||||
if (dev && netif_running(dev)) {
|
||||
sky2_tx_complete(netdev_priv(dev),
|
||||
sky2_read16(hw, port == 0
|
||||
? STAT_TXA1_RIDX : STAT_TXA2_RIDX));
|
||||
static inline void sky2_tx_check(struct sky2_hw *hw, int port, u16 last)
|
||||
{
|
||||
if (last != TX_NO_STATUS) {
|
||||
struct net_device *dev = hw->dev[port];
|
||||
if (dev && netif_running(dev)) {
|
||||
struct sky2_port *sky2 = netdev_priv(dev);
|
||||
sky2_tx_complete(sky2, last);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -1735,6 +1737,7 @@ static int sky2_poll(struct net_device *dev0, int *budget)
|
|||
unsigned int to_do = min(dev0->quota, *budget);
|
||||
unsigned int work_done = 0;
|
||||
u16 hwidx;
|
||||
u16 tx_done[2] = { TX_NO_STATUS, TX_NO_STATUS };
|
||||
|
||||
sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
|
||||
hwidx = sky2_read16(hw, STAT_PUT_IDX);
|
||||
|
@ -1806,7 +1809,10 @@ static int sky2_poll(struct net_device *dev0, int *budget)
|
|||
break;
|
||||
|
||||
case OP_TXINDEXLE:
|
||||
/* pick up transmit status later */
|
||||
/* TX index reports status for both ports */
|
||||
tx_done[0] = status & 0xffff;
|
||||
tx_done[1] = ((status >> 24) & 0xff)
|
||||
| (u16)(length & 0xf) << 8;
|
||||
break;
|
||||
|
||||
default:
|
||||
|
@ -1818,16 +1824,13 @@ static int sky2_poll(struct net_device *dev0, int *budget)
|
|||
}
|
||||
|
||||
exit_loop:
|
||||
sky2_tx_check(hw, 0);
|
||||
sky2_tx_check(hw, 1);
|
||||
|
||||
mmiowb();
|
||||
|
||||
sky2_tx_check(hw, 0, tx_done[0]);
|
||||
sky2_tx_check(hw, 1, tx_done[1]);
|
||||
|
||||
if (work_done < to_do) {
|
||||
/*
|
||||
* Another chip workaround, need to restart TX timer if status
|
||||
* LE was handled. WA_DEV_43_418
|
||||
*/
|
||||
/* need to restart TX timer */
|
||||
if (is_ec_a1(hw)) {
|
||||
sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP);
|
||||
sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START);
|
||||
|
|
Loading…
Add table
Reference in a new issue