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Tue, 21 Jul 2020 17:14:50 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 36E70C433C9; Tue, 21 Jul 2020 17:14:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from pillair-linux.qualcomm.com (unknown [202.46.22.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: pillair) by smtp.codeaurora.org (Postfix) with ESMTPSA id B2DBEC43395; Tue, 21 Jul 2020 17:14:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org B2DBEC43395 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=pillair@codeaurora.org From: Rakesh Pillai To: ath10k@lists.infradead.org Subject: [RFC 2/7] ath10k: Add support to process rx packet in thread Date: Tue, 21 Jul 2020 22:44:21 +0530 Message-Id: <1595351666-28193-3-git-send-email-pillair@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1595351666-28193-1-git-send-email-pillair@codeaurora.org> References: <1595351666-28193-1-git-send-email-pillair@codeaurora.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200721_131452_388202_8D11F2D3 X-CRM114-Status: GOOD ( 17.22 ) 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_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid 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: netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, evgreen@chromium.org, dianders@chromium.org, Rakesh Pillai , kuba@kernel.org, johannes@sipsolutions.net, davem@davemloft.net, kvalo@codeaurora.org MIME-Version: 1.0 Sender: "ath10k" Errors-To: ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org NAPI instance gets scheduled on a CPU core on which the IRQ was triggered. The processing of rx packets can be CPU intensive and since NAPI cannot be moved to a different CPU core, to get better performance, its better to move the gist of rx packet processing in a high priority thread. Add the init/deinit part for a thread to process the receive packets. Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1 Signed-off-by: Rakesh Pillai --- drivers/net/wireless/ath/ath10k/core.c | 33 +++++++++++++++++++++++++++ drivers/net/wireless/ath/ath10k/core.h | 23 +++++++++++++++++++ drivers/net/wireless/ath/ath10k/snoc.c | 41 ++++++++++++++++++++++++++++++++++ 3 files changed, 97 insertions(+) diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index 9104496..2b520a0 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -668,6 +668,39 @@ static unsigned int ath10k_core_get_fw_feature_str(char *buf, return scnprintf(buf, buf_len, "%s", ath10k_core_fw_feature_str[feat]); } +int ath10k_core_thread_shutdown(struct ath10k *ar, + struct ath10k_thread *thread) +{ + ath10k_dbg(ar, ATH10K_DBG_BOOT, "shutting down %s\n", thread->name); + set_bit(ATH10K_THREAD_EVENT_SHUTDOWN, thread->event_flags); + wake_up_process(thread->task); + wait_for_completion(&thread->shutdown); + ath10k_info(ar, "thread %s exited\n", thread->name); + + return 0; +} +EXPORT_SYMBOL(ath10k_core_thread_shutdown); + +int ath10k_core_thread_init(struct ath10k *ar, + struct ath10k_thread *thread, + int (*handler)(void *data), + char *thread_name) +{ + thread->task = kthread_create(handler, thread, thread_name); + if (IS_ERR(thread->task)) + return -EINVAL; + + init_waitqueue_head(&thread->wait_q); + init_completion(&thread->shutdown); + memcpy(thread->name, thread_name, ATH10K_THREAD_NAME_SIZE_MAX); + clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN, thread->event_flags); + ath10k_info(ar, "Starting thread %s\n", thread_name); + wake_up_process(thread->task); + + return 0; +} +EXPORT_SYMBOL(ath10k_core_thread_init); + void ath10k_core_get_fw_features_str(struct ath10k *ar, char *buf, size_t buf_len) diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h index 5c18f6c..96919e8 100644 --- a/drivers/net/wireless/ath/ath10k/core.h +++ b/drivers/net/wireless/ath/ath10k/core.h @@ -970,6 +970,22 @@ struct ath10k_bus_params { bool hl_msdu_ids; }; +#define ATH10K_THREAD_NAME_SIZE_MAX 32 + +enum ath10k_thread_events { + ATH10K_THREAD_EVENT_SHUTDOWN, + ATH10K_THREAD_EVENT_MAX, +}; + +struct ath10k_thread { + struct ath10k *ar; + struct task_struct *task; + struct completion shutdown; + wait_queue_head_t wait_q; + DECLARE_BITMAP(event_flags, ATH10K_THREAD_EVENT_MAX); + char name[ATH10K_THREAD_NAME_SIZE_MAX]; +}; + struct ath10k { struct ath_common ath_common; struct ieee80211_hw *hw; @@ -982,6 +998,7 @@ struct ath10k { } msa; u8 mac_addr[ETH_ALEN]; + struct ath10k_thread rx_thread; enum ath10k_hw_rev hw_rev; u16 dev_id; u32 chip_id; @@ -1276,6 +1293,12 @@ static inline bool ath10k_peer_stats_enabled(struct ath10k *ar) extern unsigned long ath10k_coredump_mask; +int ath10k_core_thread_shutdown(struct ath10k *ar, + struct ath10k_thread *thread); +int ath10k_core_thread_init(struct ath10k *ar, + struct ath10k_thread *thread, + int (*handler)(void *data), + char *thread_name); struct ath10k *ath10k_core_create(size_t priv_size, struct device *dev, enum ath10k_bus bus, enum ath10k_hw_rev hw_rev, diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c index 1ef5fdb..463c34e 100644 --- a/drivers/net/wireless/ath/ath10k/snoc.c +++ b/drivers/net/wireless/ath/ath10k/snoc.c @@ -909,6 +909,31 @@ static void ath10k_snoc_buffer_cleanup(struct ath10k *ar) } } +int ath10k_snoc_rx_thread_loop(void *data) +{ + struct ath10k_thread *rx_thread = data; + struct ath10k *ar = rx_thread->ar; + bool shutdown = false; + + ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread started\n"); + set_user_nice(current, -1); + + while (!shutdown) { + wait_event_interruptible( + rx_thread->wait_q, + (test_bit(ATH10K_THREAD_EVENT_SHUTDOWN, + rx_thread->event_flags))); + if (test_and_clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN, + rx_thread->event_flags)) + shutdown = true; + } + + ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread exiting\n"); + complete(&rx_thread->shutdown); + + do_exit(0); +} + static void ath10k_snoc_hif_stop(struct ath10k *ar) { if (!test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)) @@ -916,6 +941,7 @@ static void ath10k_snoc_hif_stop(struct ath10k *ar) napi_synchronize(&ar->napi); napi_disable(&ar->napi); + ath10k_core_thread_shutdown(ar, &ar->rx_thread); ath10k_snoc_buffer_cleanup(ar); ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif stop\n"); } @@ -923,9 +949,19 @@ static void ath10k_snoc_hif_stop(struct ath10k *ar) static int ath10k_snoc_hif_start(struct ath10k *ar) { struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar); + int ret; bitmap_clear(ar_snoc->pending_ce_irqs, 0, CE_COUNT_MAX); napi_enable(&ar->napi); + + ret = ath10k_core_thread_init(ar, &ar->rx_thread, + ath10k_snoc_rx_thread_loop, + "ath10k_rx_thread"); + if (ret) { + ath10k_err(ar, "failed to start rx thread\n"); + goto rx_thread_fail; + } + ath10k_snoc_irq_enable(ar); ath10k_snoc_rx_post(ar); @@ -934,6 +970,10 @@ static int ath10k_snoc_hif_start(struct ath10k *ar) ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif start\n"); return 0; + +rx_thread_fail: + napi_disable(&ar->napi); + return ret; } static int ath10k_snoc_init_pipes(struct ath10k *ar) @@ -1652,6 +1692,7 @@ static int ath10k_snoc_probe(struct platform_device *pdev) return -ENOMEM; } + ar->rx_thread.ar = ar; ar_snoc = ath10k_snoc_priv(ar); ar_snoc->dev = pdev; platform_set_drvdata(pdev, ar);