From patchwork Sat Jun 15 10:00:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislaw Gruszka X-Patchwork-Id: 10997039 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0592713AF for ; Sat, 15 Jun 2019 10:01:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EA2F42877B for ; Sat, 15 Jun 2019 10:01:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DE689287A9; Sat, 15 Jun 2019 10:01:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 691202877B for ; Sat, 15 Jun 2019 10:01:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726591AbfFOKBL (ORCPT ); Sat, 15 Jun 2019 06:01:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58132 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725944AbfFOKBL (ORCPT ); Sat, 15 Jun 2019 06:01:11 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8236D308FC4D; Sat, 15 Jun 2019 10:01:10 +0000 (UTC) Received: from localhost (ovpn-204-44.brq.redhat.com [10.40.204.44]) by smtp.corp.redhat.com (Postfix) with ESMTP id 214A060A98; Sat, 15 Jun 2019 10:01:09 +0000 (UTC) From: Stanislaw Gruszka To: linux-wireless@vger.kernel.org Cc: =?utf-8?q?Tomislav_Po=C5=BEega?= , Daniel Golle , Felix Fietkau , Mathias Kresin Subject: [PATCH v2 6/7] rt2x00: add restart hw Date: Sat, 15 Jun 2019 12:00:59 +0200 Message-Id: <20190615100100.29800-7-sgruszka@redhat.com> In-Reply-To: <20190615100100.29800-1-sgruszka@redhat.com> References: <20190615100100.29800-1-sgruszka@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.43]); Sat, 15 Jun 2019 10:01:10 +0000 (UTC) Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add ieee80211_restart_hw() to watchdog and debugfs file for testing if restart works as expected. Signed-off-by: Stanislaw Gruszka --- .../net/wireless/ralink/rt2x00/rt2800lib.c | 4 +++ drivers/net/wireless/ralink/rt2x00/rt2x00.h | 7 ++++ .../net/wireless/ralink/rt2x00/rt2x00debug.c | 35 +++++++++++++++++++ .../net/wireless/ralink/rt2x00/rt2x00dev.c | 10 ++++-- 4 files changed, 54 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c index 32a4b84e6e05..0fb519f2b83f 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c @@ -1263,6 +1263,9 @@ void rt2800_watchdog(struct rt2x00_dev *rt2x00dev) if (hung_rx) rt2x00_warn(rt2x00dev, "Watchdog RX hung detected\n"); + + if (hung_tx || hung_rx) + ieee80211_restart_hw(rt2x00dev->hw); } EXPORT_SYMBOL_GPL(rt2800_watchdog); @@ -10283,6 +10286,7 @@ int rt2800_probe_hw(struct rt2x00_dev *rt2x00dev) __set_bit(REQUIRE_TASKLET_CONTEXT, &rt2x00dev->cap_flags); } + __set_bit(CAPABILITY_RESTART_HW, &rt2x00dev->cap_flags); rt2x00dev->link.watchdog_interval = msecs_to_jiffies(100); /* diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00.h b/drivers/net/wireless/ralink/rt2x00/rt2x00.h index dc6b79e4be3b..7c7cced009bd 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h @@ -712,6 +712,7 @@ enum rt2x00_capability_flags { CAPABILITY_VCO_RECALIBRATION, CAPABILITY_EXTERNAL_PA_TX0, CAPABILITY_EXTERNAL_PA_TX1, + CAPABILITY_RESTART_HW, }; /* @@ -1268,6 +1269,12 @@ rt2x00_has_cap_vco_recalibration(struct rt2x00_dev *rt2x00dev) return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_VCO_RECALIBRATION); } +static inline bool +rt2x00_has_cap_restart_hw(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RESTART_HW); +} + /** * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes. * @entry: Pointer to &struct queue_entry diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c b/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c index aac3aae7afaa..ef5f51512212 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c @@ -52,6 +52,7 @@ struct rt2x00debug_intf { * - chipset file * - device state flags file * - device capability flags file + * - hardware restart file * - register folder * - csr offset/value files * - eeprom offset/value files @@ -68,6 +69,7 @@ struct rt2x00debug_intf { struct dentry *chipset_entry; struct dentry *dev_flags; struct dentry *cap_flags; + struct dentry *restart_hw; struct dentry *register_folder; struct dentry *csr_off_entry; struct dentry *csr_val_entry; @@ -566,6 +568,34 @@ static const struct file_operations rt2x00debug_fop_cap_flags = { .llseek = default_llseek, }; +static ssize_t rt2x00debug_write_restart_hw(struct file *file, + const char __user *buf, + size_t length, + loff_t *offset) +{ + struct rt2x00debug_intf *intf = file->private_data; + struct rt2x00_dev *rt2x00dev = intf->rt2x00dev; + static unsigned long last_reset; + + if (!rt2x00_has_cap_restart_hw(rt2x00dev)) + return -EOPNOTSUPP; + + if (time_before(jiffies, last_reset + msecs_to_jiffies(2000))) + return -EBUSY; + + last_reset = jiffies; + + ieee80211_restart_hw(rt2x00dev->hw); + return length; +} + +static const struct file_operations rt2x00debug_restart_hw = { + .owner = THIS_MODULE, + .write = rt2x00debug_write_restart_hw, + .open = simple_open, + .llseek = generic_file_llseek, +}; + static struct dentry *rt2x00debug_create_file_driver(const char *name, struct rt2x00debug_intf *intf, @@ -661,6 +691,10 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev) intf->driver_folder, intf, &rt2x00debug_fop_cap_flags); + intf->restart_hw = debugfs_create_file("restart_hw", 0200, + intf->driver_folder, intf, + &rt2x00debug_restart_hw); + intf->register_folder = debugfs_create_dir("register", intf->driver_folder); @@ -742,6 +776,7 @@ void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev) debugfs_remove(intf->csr_off_entry); debugfs_remove(intf->register_folder); debugfs_remove(intf->dev_flags); + debugfs_remove(intf->restart_hw); debugfs_remove(intf->cap_flags); debugfs_remove(intf->chipset_entry); debugfs_remove(intf->driver_entry); diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c b/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c index a6c374c483c2..35414f97a978 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c @@ -1258,8 +1258,14 @@ int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) { int retval; - if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) - return 0; + if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) { + /* + * This is special case for ieee80211_restart_hw(), otherwise + * mac80211 never call start() two times in row without stop(); + */ + rt2x00dev->ops->lib->pre_reset_hw(rt2x00dev); + rt2x00lib_stop(rt2x00dev); + } /* * If this is the first interface which is added,