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authorOlof Johansson <olof@lixom.net>2007-11-28 20:56:54 -0600
committerDavid S. Miller <davem@davemloft.net>2008-01-28 15:04:23 -0800
commit61cec3bddc79373a246e2f8eb13e5acdc106f46a (patch)
tree4c2780bc195ed6acce57073101b98813595206c8 /drivers/net
parent5c15332bed4c59fff6423f08ef6bd6894af38a99 (diff)
pasemi_mac: Fix TX cleaning
pasemi_mac: Fix TX cleaning This is a bit awkward. We don't have a timer-delayed interrupt on TX complete, but we have a count threshold. So set that reasonably high (32 packets), and schedule the NAPI poll when it goes off. Also bump a regular timer that will take care of rotting packets for the last 1..31 ones in case we don't trigger a TX interrupt (and there's no RX activity that would otherwise trigger the poll). The longer-term fix is to separate TX from RX NAPI and do two separate poll loops. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/pasemi_mac.c41
-rw-r--r--drivers/net/pasemi_mac.h1
2 files changed, 34 insertions, 8 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index c6e24a8dcf7..683e8de0ac8 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -805,27 +805,43 @@ static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
return IRQ_HANDLED;
}
+#define TX_CLEAN_INTERVAL HZ
+
+static void pasemi_mac_tx_timer(unsigned long data)
+{
+ struct pasemi_mac_txring *txring = (struct pasemi_mac_txring *)data;
+ struct pasemi_mac *mac = txring->mac;
+
+ pasemi_mac_clean_tx(txring);
+
+ mod_timer(&txring->clean_timer, jiffies + TX_CLEAN_INTERVAL);
+
+ pasemi_mac_restart_tx_intr(mac);
+}
+
static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
{
struct pasemi_mac_txring *txring = data;
const struct pasemi_dmachan *chan = &txring->chan;
- unsigned int reg, pcnt;
+ struct pasemi_mac *mac = txring->mac;
+ unsigned int reg;
if (!(*chan->status & PAS_STATUS_CAUSE_M))
return IRQ_NONE;
- pasemi_mac_clean_tx(txring);
-
- pcnt = *chan->status & PAS_STATUS_PCNT_M;
-
- reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
+ reg = 0;
if (*chan->status & PAS_STATUS_SOFT)
reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
if (*chan->status & PAS_STATUS_ERROR)
reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
- write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg);
+ mod_timer(&txring->clean_timer, jiffies + (TX_CLEAN_INTERVAL)*2);
+
+ netif_rx_schedule(mac->netdev, &mac->napi);
+
+ if (reg)
+ write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg);
return IRQ_HANDLED;
}
@@ -973,7 +989,7 @@ static int pasemi_mac_open(struct net_device *dev)
PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno),
- PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
+ PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
write_mac_reg(mac, PAS_MAC_IPC_CHNL,
PAS_MAC_IPC_CHNL_DCHNO(mac->rx->chan.chno) |
@@ -1054,6 +1070,12 @@ static int pasemi_mac_open(struct net_device *dev)
if (mac->phydev)
phy_start(mac->phydev);
+ init_timer(&mac->tx->clean_timer);
+ mac->tx->clean_timer.function = pasemi_mac_tx_timer;
+ mac->tx->clean_timer.data = (unsigned long)mac->tx;
+ mac->tx->clean_timer.expires = jiffies+HZ;
+ add_timer(&mac->tx->clean_timer);
+
return 0;
out_rx_int:
@@ -1087,6 +1109,8 @@ static int pasemi_mac_close(struct net_device *dev)
phy_disconnect(mac->phydev);
}
+ del_timer_sync(&mac->tx->clean_timer);
+
netif_stop_queue(dev);
napi_disable(&mac->napi);
@@ -1304,6 +1328,7 @@ static int pasemi_mac_poll(struct napi_struct *napi, int budget)
netif_rx_complete(dev, napi);
pasemi_mac_restart_rx_intr(mac);
+ pasemi_mac_restart_tx_intr(mac);
}
return pkts;
}
diff --git a/drivers/net/pasemi_mac.h b/drivers/net/pasemi_mac.h
index 64b2047d19f..c6555edba55 100644
--- a/drivers/net/pasemi_mac.h
+++ b/drivers/net/pasemi_mac.h
@@ -34,6 +34,7 @@ struct pasemi_mac_txring {
unsigned int next_to_clean;
struct pasemi_mac_buffer *ring_info;
struct pasemi_mac *mac; /* Needed in intr handler */
+ struct timer_list clean_timer;
};
struct pasemi_mac_rxring {