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Wed, 21 Apr 2021 23:05:14 -0400 Authenticated-By: X-SpamFilter-By: ArmorX SpamTrap 5.73 with qID 13M34XMB0021051, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36502.realtek.com.tw[172.21.6.25]) by rtits2.realtek.com.tw (8.15.2/2.71/5.88) with ESMTPS id 13M34XMB0021051 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Thu, 22 Apr 2021 11:04:33 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36502.realtek.com.tw (172.21.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Thu, 22 Apr 2021 11:04:32 +0800 Received: from localhost (172.21.69.146) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Thu, 22 Apr 2021 11:04:31 +0800 From: Ping-Ke Shih To: , CC: , Subject: [PATCH v2 2/2] rtw88: add debugfs to force lowest basic rate Date: Thu, 22 Apr 2021 11:04:13 +0800 Message-ID: <20210422030413.9738-2-pkshih@realtek.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210422030413.9738-1-pkshih@realtek.com> References: <20210422030413.9738-1-pkshih@realtek.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; 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Add a debugfs to force to use the lowest basic rate in order to debug the reachability of transmitting management frame. obtain current setting cat /sys/kernel/debug/ieee80211/phyX/rtw88/basic_rates force lowest rate: echo 1 > /sys/kernel/debug/ieee80211/phyX/rtw88/basic_rates Signed-off-by: Yu-Yen Ting Signed-off-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw88/debug.c | 39 ++++++++++++++++++++++ drivers/net/wireless/realtek/rtw88/main.h | 1 + drivers/net/wireless/realtek/rtw88/tx.c | 3 +- 3 files changed, 42 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c index 18ab472ea46c..a99a3dc6f9f9 100644 --- a/drivers/net/wireless/realtek/rtw88/debug.c +++ b/drivers/net/wireless/realtek/rtw88/debug.c @@ -861,6 +861,39 @@ static int rtw_debugfs_get_fw_crash(struct seq_file *m, void *v) return 0; } +static ssize_t rtw_debugfs_set_basic_rates(struct file *filp, + const char __user *buffer, + size_t count, loff_t *loff) +{ + struct seq_file *seqpriv = (struct seq_file *)filp->private_data; + struct rtw_debugfs_priv *debugfs_priv = seqpriv->private; + struct rtw_dev *rtwdev = debugfs_priv->rtwdev; + bool input; + int err; + + err = kstrtobool_from_user(buffer, count, &input); + if (err) + return err; + + if (input) + set_bit(RTW_FLAG_USE_LOWEST_RATE, rtwdev->flags); + else + clear_bit(RTW_FLAG_USE_LOWEST_RATE, rtwdev->flags); + + return count; +} + +static int rtw_debugfs_get_basic_rates(struct seq_file *m, void *v) +{ + struct rtw_debugfs_priv *debugfs_priv = m->private; + struct rtw_dev *rtwdev = debugfs_priv->rtwdev; + + seq_printf(m, "use lowest: %d\n", + test_bit(RTW_FLAG_USE_LOWEST_RATE, rtwdev->flags)); + + return 0; +} + static ssize_t rtw_debugfs_set_dm_cap(struct file *filp, const char __user *buffer, size_t count, loff_t *loff) @@ -1046,6 +1079,11 @@ static struct rtw_debugfs_priv rtw_debug_priv_fw_crash = { .cb_read = rtw_debugfs_get_fw_crash, }; +static struct rtw_debugfs_priv rtw_debug_priv_basic_rates = { + .cb_write = rtw_debugfs_set_basic_rates, + .cb_read = rtw_debugfs_get_basic_rates, +}; + static struct rtw_debugfs_priv rtw_debug_priv_dm_cap = { .cb_write = rtw_debugfs_set_dm_cap, .cb_read = rtw_debugfs_get_dm_cap, @@ -1125,6 +1163,7 @@ void rtw_debugfs_init(struct rtw_dev *rtwdev) rtw_debugfs_add_r(rf_dump); rtw_debugfs_add_r(tx_pwr_tbl); rtw_debugfs_add_rw(fw_crash); + rtw_debugfs_add_rw(basic_rates); rtw_debugfs_add_rw(dm_cap); } diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h index dc3744847ba9..0df5df3a62ab 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -362,6 +362,7 @@ enum rtw_flags { RTW_FLAG_BUSY_TRAFFIC, RTW_FLAG_WOWLAN, RTW_FLAG_RESTARTING, + RTW_FLAG_USE_LOWEST_RATE, NUM_OF_RTW_FLAGS, }; diff --git a/drivers/net/wireless/realtek/rtw88/tx.c b/drivers/net/wireless/realtek/rtw88/tx.c index e5949a775283..0aeed15736c8 100644 --- a/drivers/net/wireless/realtek/rtw88/tx.c +++ b/drivers/net/wireless/realtek/rtw88/tx.c @@ -238,8 +238,9 @@ static u8 rtw_get_mgmt_rate(struct rtw_dev *rtwdev, struct sk_buff *skb, { struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); struct ieee80211_vif *vif = tx_info->control.vif; + bool use_lowest = test_bit(RTW_FLAG_USE_LOWEST_RATE, rtwdev->flags); - if (!vif || !vif->bss_conf.basic_rates || ignore_rate) + if (!vif || !vif->bss_conf.basic_rates || ignore_rate || use_lowest) return lowest_rate; return __ffs(vif->bss_conf.basic_rates) + lowest_rate; -- 2.21.0