From patchwork Thu Aug 20 08:46:20 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Taku Izumi X-Patchwork-Id: 508954 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 7C2CA14028E for ; Thu, 20 Aug 2015 18:52:53 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752921AbbHTIwr (ORCPT ); Thu, 20 Aug 2015 04:52:47 -0400 Received: from mgwym03.jp.fujitsu.com ([211.128.242.42]:42543 "EHLO mgwym03.jp.fujitsu.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752993AbbHTIvo (ORCPT ); Thu, 20 Aug 2015 04:51:44 -0400 Received: from yt-mxauth.gw.nic.fujitsu.com (unknown [192.168.229.68]) by mgwym03.jp.fujitsu.com with smtp id 648d_84f3_a6ea5306_7df3_419d_902c_9ed6cd1b1a5a; Thu, 20 Aug 2015 17:51:41 +0900 Received: from m3051.s.css.fujitsu.com (m3051.s.css.fujitsu.com [10.134.21.209]) by yt-mxauth.gw.nic.fujitsu.com (Postfix) with ESMTP id 0730BAC0B74; Thu, 20 Aug 2015 17:51:41 +0900 (JST) Received: from localhost.localdomain (unknown [10.124.196.197]) by m3051.s.css.fujitsu.com (Postfix) with ESMTP id B4DE0EA; Thu, 20 Aug 2015 17:51:40 +0900 (JST) From: Taku Izumi To: netdev@vger.kernel.org, davem@davemloft.net Cc: platform-driver-x86@vger.kernel.org, dvhart@infradead.org, rkhan@redhat.com, alexander.h.duyck@redhat.com, linux-acpi@vger.kernel.org, joe@perches.com, sergei.shtylyov@cogentembedded.com, stephen@networkplumber.org, yasu.isimatu@gmail.com, Taku Izumi Subject: [PATCH v2.2 16/22] fjes: interrupt_watch_task Date: Thu, 20 Aug 2015 17:46:20 +0900 Message-Id: <1440060386-13189-16-git-send-email-izumi.taku@jp.fujitsu.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1440060386-13189-1-git-send-email-izumi.taku@jp.fujitsu.com> References: <1440060306-13040-1-git-send-email-izumi.taku@jp.fujitsu.com> <1440060386-13189-1-git-send-email-izumi.taku@jp.fujitsu.com> X-TM-AS-MML: disable Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch adds interrupt_watch_task. This task is used to prevent delay of interrupts. Signed-off-by: Taku Izumi --- drivers/net/fjes/fjes.h | 5 +++++ drivers/net/fjes/fjes_main.c | 40 +++++++++++++++++++++++++++++++++++++++- 2 files changed, 44 insertions(+), 1 deletion(-) diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h index b04ea9d..1743dbb 100644 --- a/drivers/net/fjes/fjes.h +++ b/drivers/net/fjes/fjes.h @@ -32,6 +32,7 @@ #define FJES_TX_RETRY_TIMEOUT (100) #define FJES_TX_TX_STALL_TIMEOUT (FJES_TX_RETRY_INTERVAL / 2) #define FJES_OPEN_ZONE_UPDATE_WAIT (300) /* msec */ +#define FJES_IRQ_WATCH_DELAY (HZ) /* board specific private data structure */ struct fjes_adapter { @@ -52,10 +53,14 @@ struct fjes_adapter { bool irq_registered; struct workqueue_struct *txrx_wq; + struct workqueue_struct *control_wq; struct work_struct tx_stall_task; struct work_struct raise_intr_rxdata_task; + struct delayed_work interrupt_watch_task; + bool interrupt_watch_enable; + struct fjes_hw hw; }; diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c index 1bb9347..2bf9f71 100644 --- a/drivers/net/fjes/fjes_main.c +++ b/drivers/net/fjes/fjes_main.c @@ -71,7 +71,7 @@ static int fjes_remove(struct platform_device *); static int fjes_sw_init(struct fjes_adapter *); static void fjes_netdev_setup(struct net_device *); - +static void fjes_irq_watch_task(struct work_struct *); static void fjes_rx_irq(struct fjes_adapter *, int); static int fjes_poll(struct napi_struct *, int); @@ -197,6 +197,13 @@ static int fjes_request_irq(struct fjes_adapter *adapter) struct net_device *netdev = adapter->netdev; int result = -1; + adapter->interrupt_watch_enable = true; + if (!delayed_work_pending(&adapter->interrupt_watch_task)) { + queue_delayed_work(adapter->control_wq, + &adapter->interrupt_watch_task, + FJES_IRQ_WATCH_DELAY); + } + if (!adapter->irq_registered) { result = request_irq(adapter->hw.hw_res.irq, fjes_intr, IRQF_SHARED, netdev->name, adapter); @@ -213,6 +220,9 @@ static void fjes_free_irq(struct fjes_adapter *adapter) { struct fjes_hw *hw = &adapter->hw; + adapter->interrupt_watch_enable = false; + cancel_delayed_work_sync(&adapter->interrupt_watch_task); + fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true); if (adapter->irq_registered) { @@ -297,6 +307,7 @@ static int fjes_close(struct net_device *netdev) fjes_free_irq(adapter); + cancel_delayed_work_sync(&adapter->interrupt_watch_task); cancel_work_sync(&adapter->raise_intr_rxdata_task); cancel_work_sync(&adapter->tx_stall_task); @@ -999,11 +1010,15 @@ static int fjes_probe(struct platform_device *plat_dev) adapter->open_guard = false; adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx"); + adapter->control_wq = create_workqueue(DRV_NAME "/control"); INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task); INIT_WORK(&adapter->raise_intr_rxdata_task, fjes_raise_intr_rxdata_task); + INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task); + adapter->interrupt_watch_enable = false; + res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0); hw->hw_res.start = res->start; hw->hw_res.size = res->end - res->start + 1; @@ -1044,8 +1059,11 @@ static int fjes_remove(struct platform_device *plat_dev) struct fjes_adapter *adapter = netdev_priv(netdev); struct fjes_hw *hw = &adapter->hw; + cancel_delayed_work_sync(&adapter->interrupt_watch_task); cancel_work_sync(&adapter->raise_intr_rxdata_task); cancel_work_sync(&adapter->tx_stall_task); + if (adapter->control_wq) + destroy_workqueue(adapter->control_wq); if (adapter->txrx_wq) destroy_workqueue(adapter->txrx_wq); @@ -1081,6 +1099,26 @@ static void fjes_netdev_setup(struct net_device *netdev) netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER; } +static void fjes_irq_watch_task(struct work_struct *work) +{ + struct fjes_adapter *adapter = container_of(to_delayed_work(work), + struct fjes_adapter, interrupt_watch_task); + + local_irq_disable(); + fjes_intr(adapter->hw.hw_res.irq, adapter); + local_irq_enable(); + + if (fjes_rxframe_search_exist(adapter, 0) >= 0) + napi_schedule(&adapter->napi); + + if (adapter->interrupt_watch_enable) { + if (!delayed_work_pending(&adapter->interrupt_watch_task)) + queue_delayed_work(adapter->control_wq, + &adapter->interrupt_watch_task, + FJES_IRQ_WATCH_DELAY); + } +} + /* fjes_init_module - Driver Registration Routine */ static int __init fjes_init_module(void) {