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authorMalli Chilakala <mallikarjuna.chilakala@intel.com>2005-04-28 22:19:46 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-05-12 20:59:28 -0400
commit962082b6df11fe8cabafd2971b07c914cd52ee2a (patch)
treeb6c1cf72db43fbb5064cc91d3d07a4ffb68a6b0c /drivers/net/e100.c
parent6bdacb1ad58bb6b772a4fc18f21684437bd5f439 (diff)
[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.c16
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)
777 return 0; 777 return 0;
778} 778}
779 779
780#define E100_WAIT_SCB_TIMEOUT 40 780#define E100_WAIT_SCB_TIMEOUT 20000 /* we might have to wait 100ms!!! */
781static inline int e100_exec_cmd(struct nic *nic, u8 cmd, dma_addr_t dma_addr) 781static inline int e100_exec_cmd(struct nic *nic, u8 cmd, dma_addr_t dma_addr)
782{ 782{
783 unsigned long flags; 783 unsigned long flags;
@@ -847,6 +847,10 @@ static inline int e100_exec_cb(struct nic *nic, struct sk_buff *skb,
847 * because the controller is too busy, so 847 * because the controller is too busy, so
848 * let's just queue the command and try again 848 * let's just queue the command and try again
849 * when another command is scheduled. */ 849 * when another command is scheduled. */
850 if(err == -ENOSPC) {
851 //request a reset
852 schedule_work(&nic->tx_timeout_task);
853 }
850 break; 854 break;
851 } else { 855 } else {
852 nic->cuc_cmd = cuc_resume; 856 nic->cuc_cmd = cuc_resume;
@@ -891,7 +895,7 @@ static void mdio_write(struct net_device *netdev, int addr, int reg, int data)
891 895
892static void e100_get_defaults(struct nic *nic) 896static void e100_get_defaults(struct nic *nic)
893{ 897{
894 struct param_range rfds = { .min = 64, .max = 256, .count = 64 }; 898 struct param_range rfds = { .min = 16, .max = 256, .count = 64 };
895 struct param_range cbs = { .min = 64, .max = 256, .count = 64 }; 899 struct param_range cbs = { .min = 64, .max = 256, .count = 64 };
896 900
897 pci_read_config_byte(nic->pdev, PCI_REVISION_ID, &nic->rev_id); 901 pci_read_config_byte(nic->pdev, PCI_REVISION_ID, &nic->rev_id);
@@ -906,8 +910,9 @@ static void e100_get_defaults(struct nic *nic)
906 /* Quadwords to DMA into FIFO before starting frame transmit */ 910 /* Quadwords to DMA into FIFO before starting frame transmit */
907 nic->tx_threshold = 0xE0; 911 nic->tx_threshold = 0xE0;
908 912
909 nic->tx_command = cpu_to_le16(cb_tx | cb_i | cb_tx_sf | 913 /* no interrupt for every tx completion, delay = 256us if not 557*/
910 ((nic->mac >= mac_82558_D101_A4) ? cb_cid : 0)); 914 nic->tx_command = cpu_to_le16(cb_tx | cb_tx_sf |
915 ((nic->mac >= mac_82558_D101_A4) ? cb_cid : cb_i));
911 916
912 /* Template for a freshly allocated RFD */ 917 /* Template for a freshly allocated RFD */
913 nic->blank_rfd.command = cpu_to_le16(cb_el); 918 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,
1289 struct sk_buff *skb) 1294 struct sk_buff *skb)
1290{ 1295{
1291 cb->command = nic->tx_command; 1296 cb->command = nic->tx_command;
1297 /* interrupt every 16 packets regardless of delay */
1298 if((nic->cbs_avail & ~15) == nic->cbs_avail) cb->command |= cb_i;
1292 cb->u.tcb.tbd_array = cb->dma_addr + offsetof(struct cb, u.tcb.tbd); 1299 cb->u.tcb.tbd_array = cb->dma_addr + offsetof(struct cb, u.tcb.tbd);
1293 cb->u.tcb.tcb_byte_count = 0; 1300 cb->u.tcb.tcb_byte_count = 0;
1294 cb->u.tcb.threshold = nic->tx_threshold; 1301 cb->u.tcb.threshold = nic->tx_threshold;
1295 cb->u.tcb.tbd_count = 1; 1302 cb->u.tcb.tbd_count = 1;
1296 cb->u.tcb.tbd.buf_addr = cpu_to_le32(pci_map_single(nic->pdev, 1303 cb->u.tcb.tbd.buf_addr = cpu_to_le32(pci_map_single(nic->pdev,
1297 skb->data, skb->len, PCI_DMA_TODEVICE)); 1304 skb->data, skb->len, PCI_DMA_TODEVICE));
1305 // check for mapping failure?
1298 cb->u.tcb.tbd.size = cpu_to_le16(skb->len); 1306 cb->u.tcb.tbd.size = cpu_to_le16(skb->len);
1299} 1307}
1300 1308