From 05aaa02d799e8e9548d57ac92fcb05e783027341 Mon Sep 17 00:00:00 2001 From: Dhananjay Phadke Date: Mon, 17 Mar 2008 19:59:49 -0700 Subject: netxen: napi and irq cleanup o separate and simpler irq handler for msi interrupts, avoids few checks than legacy mode. o avoid redudant tx_has_work() and rx_has_work() checks in interrupt and napi, which can uncork irq based on racy (lockless) access to tx and rx ring indices. If we get interrupt, there's sufficient reason to schedule napi. o replenish rx ring more often, remove self-imposed threshold rcv_free that prevents posting rx desc to card. This improves performance in low memory. Signed-off-by: Dhananjay Phadke Tested-by: Vernon Mauery Signed-off-by: Jeff Garzik --- drivers/net/netxen/netxen_nic_init.c | 76 ++---------------------------------- 1 file changed, 4 insertions(+), 72 deletions(-) (limited to 'drivers/net/netxen/netxen_nic_init.c') diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c index 43eb1f65152..64fc18d4afb 100644 --- a/drivers/net/netxen/netxen_nic_init.c +++ b/drivers/net/netxen/netxen_nic_init.c @@ -185,7 +185,6 @@ void netxen_initialize_adapter_sw(struct netxen_adapter *adapter) for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) { struct netxen_rx_buffer *rx_buf; rcv_desc = &adapter->recv_ctx[ctxid].rcv_desc[ring]; - rcv_desc->rcv_free = rcv_desc->max_rx_desc_count; rcv_desc->begin_alloc = 0; rx_buf = rcv_desc->rx_buf_arr; num_rx_bufs = rcv_desc->max_rx_desc_count; @@ -976,28 +975,6 @@ int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val) return 0; } -int netxen_nic_rx_has_work(struct netxen_adapter *adapter) -{ - int ctx; - - for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) { - struct netxen_recv_context *recv_ctx = - &(adapter->recv_ctx[ctx]); - u32 consumer; - struct status_desc *desc_head; - struct status_desc *desc; - - consumer = recv_ctx->status_rx_consumer; - desc_head = recv_ctx->rcv_status_desc_head; - desc = &desc_head[consumer]; - - if (netxen_get_sts_owner(desc) & STATUS_OWNER_HOST) - return 1; - } - - return 0; -} - static int netxen_nic_check_temp(struct netxen_adapter *adapter) { struct net_device *netdev = adapter->netdev; @@ -1040,7 +1017,6 @@ static int netxen_nic_check_temp(struct netxen_adapter *adapter) void netxen_watchdog_task(struct work_struct *work) { - struct net_device *netdev; struct netxen_adapter *adapter = container_of(work, struct netxen_adapter, watchdog_task); @@ -1050,20 +1026,6 @@ void netxen_watchdog_task(struct work_struct *work) if (adapter->handle_phy_intr) adapter->handle_phy_intr(adapter); - netdev = adapter->netdev; - if ((netif_running(netdev)) && !netif_carrier_ok(netdev) && - netxen_nic_link_ok(adapter) ) { - printk(KERN_INFO "%s %s (port %d), Link is up\n", - netxen_nic_driver_name, netdev->name, adapter->portnum); - netif_carrier_on(netdev); - netif_wake_queue(netdev); - } else if(!(netif_running(netdev)) && netif_carrier_ok(netdev)) { - printk(KERN_ERR "%s %s Link is Down\n", - netxen_nic_driver_name, netdev->name); - netif_carrier_off(netdev); - netif_stop_queue(netdev); - } - mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); } @@ -1177,7 +1139,6 @@ static void netxen_process_rcv(struct netxen_adapter *adapter, int ctxid, netdev->last_rx = jiffies; - rcv_desc->rcv_free++; rcv_desc->rcv_pending--; /* @@ -1202,13 +1163,6 @@ u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max) u32 producer = 0; int count = 0, ring; - DPRINTK(INFO, "procesing receive\n"); - /* - * we assume in this case that there is only one port and that is - * port #1...changes need to be done in firmware to indicate port - * number as part of the descriptor. This way we will be able to get - * the netdev which is associated with that device. - */ while (count < max) { desc = &desc_head[consumer]; if (!(netxen_get_sts_owner(desc) & STATUS_OWNER_HOST)) { @@ -1221,10 +1175,8 @@ u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max) consumer = (consumer + 1) & (adapter->max_rx_desc_count - 1); count++; } - if (count) { - for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) { - netxen_post_rx_buffers_nodb(adapter, ctxid, ring); - } + for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) { + netxen_post_rx_buffers_nodb(adapter, ctxid, ring); } /* update the consumer index in phantom */ @@ -1235,20 +1187,18 @@ u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max) /* Window = 1 */ writel(consumer, NETXEN_CRB_NORMALIZE(adapter, - recv_crb_registers[adapter->portnum]. + recv_crb_registers[adapter->portnum]. crb_rcv_status_consumer)); - wmb(); } return count; } /* Process Command status ring */ -int netxen_process_cmd_ring(unsigned long data) +int netxen_process_cmd_ring(struct netxen_adapter *adapter) { u32 last_consumer; u32 consumer; - struct netxen_adapter *adapter = (struct netxen_adapter *)data; int count1 = 0; int count2 = 0; struct netxen_cmd_buffer *buffer; @@ -1435,8 +1385,6 @@ void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx, u32 ringid) rcv_desc->begin_alloc = index; rcv_desc->rcv_pending += count; rcv_desc->producer = producer; - if (rcv_desc->rcv_free >= 32) { - rcv_desc->rcv_free = 0; /* Window = 1 */ writel((producer - 1) & (rcv_desc->max_rx_desc_count - 1), @@ -1460,8 +1408,6 @@ void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx, u32 ringid) writel(msg, DB_NORMALIZE(adapter, NETXEN_RCV_PRODUCER_OFFSET)); - wmb(); - } } } @@ -1525,8 +1471,6 @@ static void netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter, rcv_desc->begin_alloc = index; rcv_desc->rcv_pending += count; rcv_desc->producer = producer; - if (rcv_desc->rcv_free >= 32) { - rcv_desc->rcv_free = 0; /* Window = 1 */ writel((producer - 1) & (rcv_desc->max_rx_desc_count - 1), @@ -1536,21 +1480,9 @@ static void netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter, rcv_desc_crb[ringid]. crb_rcv_producer_offset)); wmb(); - } } } -int netxen_nic_tx_has_work(struct netxen_adapter *adapter) -{ - if (find_diff_among(adapter->last_cmd_consumer, - adapter->cmd_producer, - adapter->max_tx_desc_count) > 0) - return 1; - - return 0; -} - - void netxen_nic_clear_stats(struct netxen_adapter *adapter) { memset(&adapter->stats, 0, sizeof(adapter->stats)); -- cgit v1.2.3-70-g09d2