diff options
Diffstat (limited to 'drivers/net/netxen')
-rw-r--r-- | drivers/net/netxen/netxen_nic.h | 11 | ||||
-rw-r--r-- | drivers/net/netxen/netxen_nic_hdr.h | 1 | ||||
-rw-r--r-- | drivers/net/netxen/netxen_nic_hw.c | 6 | ||||
-rw-r--r-- | drivers/net/netxen/netxen_nic_init.c | 11 | ||||
-rw-r--r-- | drivers/net/netxen/netxen_nic_main.c | 32 |
5 files changed, 38 insertions, 23 deletions
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h index ab11c2b3f0fe..970cedeb5f37 100644 --- a/drivers/net/netxen/netxen_nic.h +++ b/drivers/net/netxen/netxen_nic.h @@ -169,6 +169,7 @@ #define MAX_NUM_CARDS 4 #define MAX_BUFFERS_PER_CMD 32 +#define TX_STOP_THRESH ((MAX_SKB_FRAGS >> 2) + 4) /* * Following are the states of the Phantom. Phantom will set them and @@ -1436,7 +1437,7 @@ int netxen_nic_set_mac(struct net_device *netdev, void *p); struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev); void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter, - struct nx_host_tx_ring *tx_ring, uint32_t crb_producer); + struct nx_host_tx_ring *tx_ring); /* * NetXen Board information @@ -1538,6 +1539,14 @@ dma_watchdog_wakeup(struct netxen_adapter *adapter) } +static inline u32 netxen_tx_avail(struct nx_host_tx_ring *tx_ring) +{ + smp_mb(); + return find_diff_among(tx_ring->producer, + tx_ring->sw_consumer, tx_ring->num_desc); + +} + int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 *mac); int netxen_p3_get_mac_addr(struct netxen_adapter *adapter, __le64 *mac); extern void netxen_change_ringparam(struct netxen_adapter *adapter); diff --git a/drivers/net/netxen/netxen_nic_hdr.h b/drivers/net/netxen/netxen_nic_hdr.h index 7f0ddbfa7b28..3cc047844af3 100644 --- a/drivers/net/netxen/netxen_nic_hdr.h +++ b/drivers/net/netxen/netxen_nic_hdr.h @@ -355,6 +355,7 @@ enum { #define NETXEN_HW_CRB_HUB_AGT_ADR_LPC \ ((NETXEN_HW_H6_CH_HUB_ADR << 7) | NETXEN_HW_LPC_CRB_AGT_ADR) +#define NETXEN_SRE_MISC (NETXEN_CRB_SRE + 0x0002c) #define NETXEN_SRE_INT_STATUS (NETXEN_CRB_SRE + 0x00034) #define NETXEN_SRE_PBI_ACTIVE_STATUS (NETXEN_CRB_SRE + 0x01014) #define NETXEN_SRE_L1RE_CTL (NETXEN_CRB_SRE + 0x03000) diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c index 42ffb825ebf1..ce3b89d2cbb6 100644 --- a/drivers/net/netxen/netxen_nic_hw.c +++ b/drivers/net/netxen/netxen_nic_hw.c @@ -488,7 +488,7 @@ netxen_send_cmd_descs(struct netxen_adapter *adapter, tx_ring->producer = producer; - netxen_nic_update_cmd_producer(adapter, tx_ring, producer); + netxen_nic_update_cmd_producer(adapter, tx_ring); netif_tx_unlock_bh(adapter->netdev); @@ -2041,8 +2041,8 @@ void netxen_nic_get_firmware_info(struct netxen_adapter *adapter) fw_major, fw_minor, fw_build); if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) { - i = NXRD32(adapter, NETXEN_MIU_MN_CONTROL); - adapter->ahw.cut_through = (i & 0x4) ? 1 : 0; + i = NXRD32(adapter, NETXEN_SRE_MISC); + adapter->ahw.cut_through = (i & 0x8000) ? 1 : 0; dev_info(&pdev->dev, "firmware running in %s mode\n", adapter->ahw.cut_through ? "cut-through" : "legacy"); } diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c index 6f77ad58e3b3..bdb143d2b5c7 100644 --- a/drivers/net/netxen/netxen_nic_init.c +++ b/drivers/net/netxen/netxen_nic_init.c @@ -1292,7 +1292,6 @@ int netxen_process_cmd_ring(struct netxen_adapter *adapter) return 1; sw_consumer = tx_ring->sw_consumer; - barrier(); /* hw_consumer can change underneath */ hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); while (sw_consumer != hw_consumer) { @@ -1319,14 +1318,15 @@ int netxen_process_cmd_ring(struct netxen_adapter *adapter) break; } - tx_ring->sw_consumer = sw_consumer; - if (count && netif_running(netdev)) { + tx_ring->sw_consumer = sw_consumer; + smp_mb(); + if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) { netif_tx_lock(netdev); - netif_wake_queue(netdev); - smp_mb(); + if (netxen_tx_avail(tx_ring) > TX_STOP_THRESH) + netif_wake_queue(netdev); netif_tx_unlock(netdev); } } @@ -1343,7 +1343,6 @@ int netxen_process_cmd_ring(struct netxen_adapter *adapter) * There is still a possible race condition and the host could miss an * interrupt. The card has to take care of this. */ - barrier(); /* hw_consumer can change underneath */ hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); done = (sw_consumer == hw_consumer); spin_unlock(&adapter->tx_clean_lock); diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c index 98737ef72936..71daa3d5f114 100644 --- a/drivers/net/netxen/netxen_nic_main.c +++ b/drivers/net/netxen/netxen_nic_main.c @@ -107,9 +107,14 @@ static uint32_t crb_cmd_producer[4] = { void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter, - struct nx_host_tx_ring *tx_ring, u32 producer) + struct nx_host_tx_ring *tx_ring) { - NXWR32(adapter, tx_ring->crb_cmd_producer, producer); + NXWR32(adapter, tx_ring->crb_cmd_producer, tx_ring->producer); + + if (netxen_tx_avail(tx_ring) <= TX_STOP_THRESH) { + netif_stop_queue(adapter->netdev); + smp_mb(); + } } static uint32_t crb_cmd_consumer[4] = { @@ -119,9 +124,9 @@ static uint32_t crb_cmd_consumer[4] = { static inline void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter, - struct nx_host_tx_ring *tx_ring, u32 consumer) + struct nx_host_tx_ring *tx_ring) { - NXWR32(adapter, tx_ring->crb_cmd_consumer, consumer); + NXWR32(adapter, tx_ring->crb_cmd_consumer, tx_ring->sw_consumer); } static uint32_t msi_tgt_status[8] = { @@ -900,8 +905,11 @@ netxen_nic_attach(struct netxen_adapter *adapter) tx_ring->crb_cmd_producer = crb_cmd_producer[adapter->portnum]; tx_ring->crb_cmd_consumer = crb_cmd_consumer[adapter->portnum]; - netxen_nic_update_cmd_producer(adapter, tx_ring, 0); - netxen_nic_update_cmd_consumer(adapter, tx_ring, 0); + tx_ring->producer = 0; + tx_ring->sw_consumer = 0; + + netxen_nic_update_cmd_producer(adapter, tx_ring); + netxen_nic_update_cmd_consumer(adapter, tx_ring); } for (ring = 0; ring < adapter->max_rds_rings; ring++) { @@ -1362,7 +1370,7 @@ netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) dma_addr_t temp_dma; int i, k; - u32 producer, consumer; + u32 producer; int frag_count, no_of_desc; u32 num_txd = tx_ring->num_desc; bool is_tso = false; @@ -1372,15 +1380,13 @@ netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) /* 4 fragments per cmd des */ no_of_desc = (frag_count + 3) >> 2; - producer = tx_ring->producer; - smp_mb(); - consumer = tx_ring->sw_consumer; - if ((no_of_desc+2) >= find_diff_among(producer, consumer, num_txd)) { + if (unlikely(no_of_desc + 2) > netxen_tx_avail(tx_ring)) { netif_stop_queue(netdev); - smp_mb(); return NETDEV_TX_BUSY; } + producer = tx_ring->producer; + hwdesc = &tx_ring->desc_head[producer]; netxen_clear_cmddesc((u64 *)hwdesc); pbuf = &tx_ring->cmd_buf_arr[producer]; @@ -1493,7 +1499,7 @@ netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) tx_ring->producer = producer; adapter->stats.txbytes += skb->len; - netxen_nic_update_cmd_producer(adapter, tx_ring, producer); + netxen_nic_update_cmd_producer(adapter, tx_ring); adapter->stats.xmitcalled++; |