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spf=none smtp.mailfrom=pillair@codeaurora.org From: Rakesh Pillai To: ath10k@lists.infradead.org Subject: [PATCH 1/2] ath10k: Pause the tx queues when firmware is down Date: Fri, 26 Jun 2020 23:41:39 +0530 Message-Id: <1593195100-24654-2-git-send-email-pillair@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1593195100-24654-1-git-send-email-pillair@codeaurora.org> References: <1593195100-24654-1-git-send-email-pillair@codeaurora.org> X-Spam-Note: CRM114 invocation failed X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [69.72.43.7 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [69.72.43.7 listed in wl.mailspike.net] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rakesh Pillai , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org MIME-Version: 1.0 Sender: "ath10k" Errors-To: ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org When the FW goes down, the transmission of packets cannot be done. Currently we are not pausing the tx queues, hence there will be too many attempts to trasmit packets and each of them resulting in failure and thereby logging unwanted failure messages onto the console, as shown below [ 60.842192] ath10k_snoc 18800000.wifi: failed to transmit packet, dropping: -108 [ 60.850181] ath10k_snoc 18800000.wifi: failed to submit frame: -108 [ 60.857058] ath10k_snoc 18800000.wifi: failed to push frame: -108 [ 60.936217] ath10k_snoc 18800000.wifi: failed to transmit packet, dropping: -108 [ 60.944496] ath10k_snoc 18800000.wifi: failed to submit frame: -108 [ 60.951265] ath10k_snoc 18800000.wifi: failed to push frame: -108 [ 61.976589] ath10k_snoc 18800000.wifi: failed to transmit packet, dropping: -108 Stop the tx queues when the wlan firmware is down and also remove the unwanted duplicate/extra logging in the packet transmission path. Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1 Signed-off-by: Rakesh Pillai --- drivers/net/wireless/ath/ath10k/core.h | 1 + drivers/net/wireless/ath/ath10k/mac.c | 18 ++++++++++-------- drivers/net/wireless/ath/ath10k/snoc.c | 3 +++ 3 files changed, 14 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h index 62b1502..040053a 100644 --- a/drivers/net/wireless/ath/ath10k/core.h +++ b/drivers/net/wireless/ath/ath10k/core.h @@ -900,6 +900,7 @@ static inline const char *ath10k_scan_state_str(enum ath10k_scan_state state) enum ath10k_tx_pause_reason { ATH10K_TX_PAUSE_Q_FULL, + ATH10K_TX_PAUSE_FW_DOWN, ATH10K_TX_PAUSE_MAX, }; diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 3e38962..dc7befc 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -3348,6 +3348,7 @@ void ath10k_mac_tx_lock(struct ath10k *ar, int reason) ar->tx_paused |= BIT(reason); ieee80211_stop_queues(ar->hw); } +EXPORT_SYMBOL(ath10k_mac_tx_lock); static void ath10k_mac_tx_unlock_iter(void *data, u8 *mac, struct ieee80211_vif *vif) @@ -3378,6 +3379,7 @@ void ath10k_mac_tx_unlock(struct ath10k *ar, int reason) ieee80211_wake_queue(ar->hw, ar->hw->offchannel_tx_hw_queue); } +EXPORT_SYMBOL(ath10k_mac_tx_unlock); void ath10k_mac_vif_tx_lock(struct ath10k_vif *arvif, int reason) { @@ -3748,11 +3750,8 @@ static int ath10k_mac_tx_submit(struct ath10k *ar, break; } - if (ret) { - ath10k_warn(ar, "failed to transmit packet, dropping: %d\n", - ret); + if (ret) ieee80211_free_txskb(ar->hw, skb); - } return ret; } @@ -3806,10 +3805,8 @@ static int ath10k_mac_tx(struct ath10k *ar, } ret = ath10k_mac_tx_submit(ar, txmode, txpath, skb); - if (ret) { - ath10k_warn(ar, "failed to submit frame: %d\n", ret); + if (ret) return ret; - } return 0; } @@ -4441,7 +4438,12 @@ static void ath10k_mac_op_tx(struct ieee80211_hw *hw, ret = ath10k_mac_tx(ar, vif, txmode, txpath, skb, false); if (ret) { - ath10k_warn(ar, "failed to transmit frame: %d\n", ret); + if (ret == -ESHUTDOWN) + ath10k_dbg(ar, ATH10K_DBG_MAC, "failed to transmit frame: %d\n", + ret); + else + ath10k_warn(ar, "failed to transmit frame: %d\n", ret); + if (is_htt) { spin_lock_bh(&ar->htt.tx_lock); ath10k_htt_tx_dec_pending(htt); diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c index 407a074..8440e64 100644 --- a/drivers/net/wireless/ath/ath10k/snoc.c +++ b/drivers/net/wireless/ath/ath10k/snoc.c @@ -20,6 +20,7 @@ #include "hif.h" #include "htc.h" #include "snoc.h" +#include "mac.h" #define ATH10K_SNOC_RX_POST_RETRY_MS 50 #define CE_POLL_PIPE 4 @@ -1296,6 +1297,7 @@ int ath10k_snoc_fw_indication(struct ath10k *ar, u64 type) switch (type) { case ATH10K_QMI_EVENT_FW_READY_IND: if (test_bit(ATH10K_SNOC_FLAG_REGISTERED, &ar_snoc->flags)) { + ath10k_mac_tx_unlock(ar, ATH10K_TX_PAUSE_FW_DOWN); queue_work(ar->workqueue, &ar->restart_work); break; } @@ -1313,6 +1315,7 @@ int ath10k_snoc_fw_indication(struct ath10k *ar, u64 type) case ATH10K_QMI_EVENT_FW_DOWN_IND: set_bit(ATH10K_SNOC_FLAG_RECOVERY, &ar_snoc->flags); set_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags); + ath10k_mac_tx_lock(ar, ATH10K_TX_PAUSE_FW_DOWN); break; default: ath10k_err(ar, "invalid fw indication: %llx\n", type);