From patchwork Thu Aug 20 08:46:22 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Taku Izumi X-Patchwork-Id: 7042151 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id EEB509F344 for ; Thu, 20 Aug 2015 08:52:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EC88C20503 for ; Thu, 20 Aug 2015 08:52:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9837C20592 for ; Thu, 20 Aug 2015 08:52:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752960AbbHTIw2 (ORCPT ); Thu, 20 Aug 2015 04:52:28 -0400 Received: from mgwym03.jp.fujitsu.com ([211.128.242.42]:42554 "EHLO mgwym03.jp.fujitsu.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753135AbbHTIvq (ORCPT ); Thu, 20 Aug 2015 04:51:46 -0400 Received: from yt-mxauth.gw.nic.fujitsu.com (unknown [192.168.229.68]) by mgwym03.jp.fujitsu.com with smtp id 2e61_5136_452c0a89_f325_4fb3_a51d_bc23af10d208; Thu, 20 Aug 2015 17:51:43 +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 836F2AC0B5C; Thu, 20 Aug 2015 17:51:43 +0900 (JST) Received: from localhost.localdomain (unknown [10.124.196.197]) by m3051.s.css.fujitsu.com (Postfix) with ESMTP id 42879EA; Thu, 20 Aug 2015 17:51:43 +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 18/22] fjes: unshare_watch_task Date: Thu, 20 Aug 2015 17:46:22 +0900 Message-Id: <1440060386-13189-18-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: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds unshare_watch_task. Shared buffer's status can be changed into unshared. This task is used to monitor shared buffer's status. Signed-off-by: Taku Izumi --- drivers/net/fjes/fjes.h | 3 ++ drivers/net/fjes/fjes_main.c | 126 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 129 insertions(+) diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h index d31d4c3..57feee8 100644 --- a/drivers/net/fjes/fjes.h +++ b/drivers/net/fjes/fjes.h @@ -59,6 +59,9 @@ struct fjes_adapter { struct work_struct tx_stall_task; struct work_struct raise_intr_rxdata_task; + struct work_struct unshare_watch_task; + unsigned long unshare_watch_bitmask; + struct delayed_work interrupt_watch_task; bool interrupt_watch_enable; diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c index 3a8cc5b..e31a229 100644 --- a/drivers/net/fjes/fjes_main.c +++ b/drivers/net/fjes/fjes_main.c @@ -73,6 +73,7 @@ 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_watch_unshare_task(struct work_struct *); static void fjes_rx_irq(struct fjes_adapter *, int); static int fjes_poll(struct napi_struct *, int); @@ -309,6 +310,8 @@ static int fjes_close(struct net_device *netdev) fjes_free_irq(adapter); cancel_delayed_work_sync(&adapter->interrupt_watch_task); + cancel_work_sync(&adapter->unshare_watch_task); + adapter->unshare_watch_bitmask = 0; cancel_work_sync(&adapter->raise_intr_rxdata_task); cancel_work_sync(&adapter->tx_stall_task); @@ -1028,6 +1031,8 @@ static int fjes_probe(struct platform_device *plat_dev) INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task); INIT_WORK(&adapter->raise_intr_rxdata_task, fjes_raise_intr_rxdata_task); + INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task); + adapter->unshare_watch_bitmask = 0; INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task); adapter->interrupt_watch_enable = false; @@ -1073,6 +1078,7 @@ static int fjes_remove(struct platform_device *plat_dev) struct fjes_hw *hw = &adapter->hw; cancel_delayed_work_sync(&adapter->interrupt_watch_task); + cancel_work_sync(&adapter->unshare_watch_task); cancel_work_sync(&adapter->raise_intr_rxdata_task); cancel_work_sync(&adapter->tx_stall_task); if (adapter->control_wq) @@ -1132,6 +1138,126 @@ static void fjes_irq_watch_task(struct work_struct *work) } } +static void fjes_watch_unshare_task(struct work_struct *work) +{ + struct fjes_adapter *adapter = + container_of(work, struct fjes_adapter, unshare_watch_task); + + struct fjes_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + int epidx; + int max_epid, my_epid; + unsigned long unshare_watch_bitmask; + int wait_time = 0; + int is_shared; + int stop_req, stop_req_done; + int unshare_watch, unshare_reserve; + int ret; + + my_epid = hw->my_epid; + max_epid = hw->max_epid; + + unshare_watch_bitmask = adapter->unshare_watch_bitmask; + adapter->unshare_watch_bitmask = 0; + + while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) && + (wait_time < 3000)) { + for (epidx = 0; epidx < hw->max_epid; epidx++) { + if (epidx == hw->my_epid) + continue; + + is_shared = fjes_hw_epid_is_shared(hw->hw_info.share, + epidx); + + stop_req = test_bit(epidx, &hw->txrx_stop_req_bit); + + stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status & + FJES_RX_STOP_REQ_DONE; + + unshare_watch = test_bit(epidx, &unshare_watch_bitmask); + + unshare_reserve = test_bit(epidx, + &hw->hw_info.buffer_unshare_reserve_bit); + + if ((!stop_req || + (is_shared && (!is_shared || !stop_req_done))) && + (is_shared || !unshare_watch || !unshare_reserve)) + continue; + + mutex_lock(&hw->hw_info.lock); + ret = fjes_hw_unregister_buff_addr(hw, epidx); + switch (ret) { + case 0: + break; + case -ENOMSG: + case -EBUSY: + default: + if (!work_pending( + &adapter->force_close_task)) { + adapter->force_reset = true; + schedule_work( + &adapter->force_close_task); + } + break; + } + mutex_unlock(&hw->hw_info.lock); + + fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx, + netdev->dev_addr, netdev->mtu); + + clear_bit(epidx, &hw->txrx_stop_req_bit); + clear_bit(epidx, &unshare_watch_bitmask); + clear_bit(epidx, + &hw->hw_info.buffer_unshare_reserve_bit); + } + + msleep(100); + wait_time += 100; + } + + if (hw->hw_info.buffer_unshare_reserve_bit) { + for (epidx = 0; epidx < hw->max_epid; epidx++) { + if (epidx == hw->my_epid) + continue; + + if (test_bit(epidx, + &hw->hw_info.buffer_unshare_reserve_bit)) { + mutex_lock(&hw->hw_info.lock); + + ret = fjes_hw_unregister_buff_addr(hw, epidx); + switch (ret) { + case 0: + break; + case -ENOMSG: + case -EBUSY: + default: + if (!work_pending( + &adapter->force_close_task)) { + adapter->force_reset = true; + schedule_work( + &adapter->force_close_task); + } + break; + } + mutex_unlock(&hw->hw_info.lock); + + fjes_hw_setup_epbuf( + &hw->ep_shm_info[epidx].tx, + netdev->dev_addr, netdev->mtu); + + clear_bit(epidx, &hw->txrx_stop_req_bit); + clear_bit(epidx, &unshare_watch_bitmask); + clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit); + } + + if (test_bit(epidx, &unshare_watch_bitmask)) { + hw->ep_shm_info[epidx].tx.info->v1i.rx_status &= + ~FJES_RX_STOP_REQ_DONE; + } + } + } +} + /* fjes_init_module - Driver Registration Routine */ static int __init fjes_init_module(void) {