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| author | Malli Chilakala <mallikarjuna.chilakala@intel.com> | 2005-04-28 19:19:46 -0700 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-05-12 20:59:28 -0400 |
| commit | 962082b6df11fe8cabafd2971b07c914cd52ee2a (patch) | |
| tree | b6c1cf72db43fbb5064cc91d3d07a4ffb68a6b0c /drivers/net/e100.c | |
| parent | 6bdacb1ad58bb6b772a4fc18f21684437bd5f439 (diff) | |
| download | linux-962082b6df11fe8cabafd2971b07c914cd52ee2a.tar.gz linux-962082b6df11fe8cabafd2971b07c914cd52ee2a.tar.bz2 linux-962082b6df11fe8cabafd2971b07c914cd52ee2a.zip | |
[PATCH] e100: Performance optimizations to e100 Tx Path
Performance optimizations to e100 Tx Path
Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Diffstat (limited to 'drivers/net/e100.c')
| -rw-r--r-- | drivers/net/e100.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/e100.c b/drivers/net/e100.c index a43b82512b60..fc2a401d561d 100644 --- a/drivers/net/e100.c +++ b/drivers/net/e100.c @@ -777,7 +777,7 @@ static int e100_eeprom_save(struct nic *nic, u16 start, u16 count) return 0; } -#define E100_WAIT_SCB_TIMEOUT 40 +#define E100_WAIT_SCB_TIMEOUT 20000 /* we might have to wait 100ms!!! */ static inline int e100_exec_cmd(struct nic *nic, u8 cmd, dma_addr_t dma_addr) { unsigned long flags; @@ -847,6 +847,10 @@ static inline int e100_exec_cb(struct nic *nic, struct sk_buff *skb, * because the controller is too busy, so * let's just queue the command and try again * when another command is scheduled. */ + if(err == -ENOSPC) { + //request a reset + schedule_work(&nic->tx_timeout_task); + } break; } else { nic->cuc_cmd = cuc_resume; @@ -891,7 +895,7 @@ static void mdio_write(struct net_device *netdev, int addr, int reg, int data) static void e100_get_defaults(struct nic *nic) { - struct param_range rfds = { .min = 64, .max = 256, .count = 64 }; + struct param_range rfds = { .min = 16, .max = 256, .count = 64 }; struct param_range cbs = { .min = 64, .max = 256, .count = 64 }; pci_read_config_byte(nic->pdev, PCI_REVISION_ID, &nic->rev_id); @@ -906,8 +910,9 @@ static void e100_get_defaults(struct nic *nic) /* Quadwords to DMA into FIFO before starting frame transmit */ nic->tx_threshold = 0xE0; - nic->tx_command = cpu_to_le16(cb_tx | cb_i | cb_tx_sf | - ((nic->mac >= mac_82558_D101_A4) ? cb_cid : 0)); + /* no interrupt for every tx completion, delay = 256us if not 557*/ + nic->tx_command = cpu_to_le16(cb_tx | cb_tx_sf | + ((nic->mac >= mac_82558_D101_A4) ? cb_cid : cb_i)); /* Template for a freshly allocated RFD */ nic->blank_rfd.command = cpu_to_le16(cb_el); @@ -1289,12 +1294,15 @@ static inline void e100_xmit_prepare(struct nic *nic, struct cb *cb, struct sk_buff *skb) { cb->command = nic->tx_command; + /* interrupt every 16 packets regardless of delay */ + if((nic->cbs_avail & ~15) == nic->cbs_avail) cb->command |= cb_i; cb->u.tcb.tbd_array = cb->dma_addr + offsetof(struct cb, u.tcb.tbd); cb->u.tcb.tcb_byte_count = 0; cb->u.tcb.threshold = nic->tx_threshold; cb->u.tcb.tbd_count = 1; cb->u.tcb.tbd.buf_addr = cpu_to_le32(pci_map_single(nic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE)); + // check for mapping failure? cb->u.tcb.tbd.size = cpu_to_le16(skb->len); } |