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[23.128.96.33]) by mx.google.com with ESMTPS id o31-20020a635d5f000000b00565cc12ee24si17428526pgm.874.2023.09.28.02.30.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Sep 2023 02:30:59 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.33 as permitted sender) client-ip=23.128.96.33; Authentication-Results: mx.google.com; dkim=pass header.i=@bootlin.com header.s=gm1 header.b=Xym9sQfq; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.33 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=bootlin.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by lipwig.vger.email (Postfix) with ESMTP id A0FB18148B8E; Thu, 28 Sep 2023 00:22:36 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at lipwig.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231752AbjI1HWQ (ORCPT + 20 others); Thu, 28 Sep 2023 03:22:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231509AbjI1HVw (ORCPT ); Thu, 28 Sep 2023 03:21:52 -0400 Received: from relay7-d.mail.gandi.net (relay7-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::227]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C20653C32; Thu, 28 Sep 2023 00:08:54 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPA id 6887920018; Thu, 28 Sep 2023 07:08:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1695884932; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SPPKnsxPiGLFIPufukLsHFF+zm3ucje7cBgO9mGwdEo=; b=Xym9sQfqrMcIef0utC3yE/5EwgJ07wVFmcZ8xbnYZBM1lax/NErHKnfnxgtNYMlPbWOhSl yr0opG3OA2pjkolLRZM3vPGSmDikhA+8eQuo2FxymUB6/9n0L3YUPpe7xLdjZ/nO/9dLn1 Hvd0wFZamJbyms9IPWDZRVNSkxq6Af4+osonBtxc0/ThZ0X+ItgRe0NkeYzDWnBlNRKpah rtviiBNQIft6R7BexzBPjWz6zF0alpgUhJrIuOuATlo1gNp8ddsOK7NbinI6RDnNgD5QCQ SP90L+giNQZgaKuxyE4ybsQ1Z4TPos7sRkFoerl1s4ZVrtALd0WLOEBwPflegA== From: Herve Codina To: Herve Codina , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Qiang Zhao , Li Yang , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Shengjiu Wang , Xiubo Li , Fabio Estevam , Nicolin Chen , Christophe Leroy , Randy Dunlap Cc: netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org, Simon Horman , Christophe JAILLET , Thomas Petazzoni Subject: [PATCH v7 30/30] net: wan: fsl_qmc_hdlc: Add framer support Date: Thu, 28 Sep 2023 09:06:48 +0200 Message-ID: <20230928070652.330429-31-herve.codina@bootlin.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230928070652.330429-1-herve.codina@bootlin.com> References: <20230928070652.330429-1-herve.codina@bootlin.com> MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Thu, 28 Sep 2023 00:22:38 -0700 (PDT) X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778273179642622762 X-GMAIL-MSGID: 1778273179642622762 Add framer support in the fsl_qmc_hdlc driver in order to be able to signal carrier changes to the network stack based on the framer status Also use this framer to provide information related to the E1/T1 line interface on IF_GET_IFACE and configure the line interface according to IF_IFACE_{E1,T1} information. Signed-off-by: Herve Codina Reviewed-by: Christophe Leroy --- drivers/net/wan/fsl_qmc_hdlc.c | 239 ++++++++++++++++++++++++++++++++- 1 file changed, 235 insertions(+), 4 deletions(-) diff --git a/drivers/net/wan/fsl_qmc_hdlc.c b/drivers/net/wan/fsl_qmc_hdlc.c index 24f466fa48b1..e5982766ff71 100644 --- a/drivers/net/wan/fsl_qmc_hdlc.c +++ b/drivers/net/wan/fsl_qmc_hdlc.c @@ -8,6 +8,7 @@ */ #include +#include #include #include #include @@ -27,6 +28,9 @@ struct qmc_hdlc { struct device *dev; struct qmc_chan *qmc_chan; struct net_device *netdev; + struct framer *framer; + spinlock_t carrier_lock; /* Protect carrier detection */ + struct notifier_block nb; bool is_crc32; spinlock_t tx_lock; /* Protect tx descriptors */ struct qmc_hdlc_desc tx_descs[8]; @@ -40,6 +44,195 @@ static inline struct qmc_hdlc *netdev_to_qmc_hdlc(struct net_device *netdev) return dev_to_hdlc(netdev)->priv; } +static int qmc_hdlc_framer_set_carrier(struct qmc_hdlc *qmc_hdlc) +{ + struct framer_status framer_status; + unsigned long flags; + int ret; + + if (!qmc_hdlc->framer) + return 0; + + spin_lock_irqsave(&qmc_hdlc->carrier_lock, flags); + + ret = framer_get_status(qmc_hdlc->framer, &framer_status); + if (ret) { + dev_err(qmc_hdlc->dev, "get framer status failed (%d)\n", ret); + goto end; + } + if (framer_status.link_is_on) + netif_carrier_on(qmc_hdlc->netdev); + else + netif_carrier_off(qmc_hdlc->netdev); + +end: + spin_unlock_irqrestore(&qmc_hdlc->carrier_lock, flags); + return ret; +} + +static int qmc_hdlc_framer_notifier(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct qmc_hdlc *qmc_hdlc = container_of(nb, struct qmc_hdlc, nb); + int ret; + + if (action != FRAMER_EVENT_STATUS) + return NOTIFY_DONE; + + ret = qmc_hdlc_framer_set_carrier(qmc_hdlc); + return ret ? NOTIFY_DONE : NOTIFY_OK; +} + +static int qmc_hdlc_framer_start(struct qmc_hdlc *qmc_hdlc) +{ + struct framer_status framer_status; + int ret; + + if (!qmc_hdlc->framer) + return 0; + + ret = framer_power_on(qmc_hdlc->framer); + if (ret) { + dev_err(qmc_hdlc->dev, "framer power-on failed (%d)\n", ret); + return ret; + } + + /* Be sure that get_status is supported */ + ret = framer_get_status(qmc_hdlc->framer, &framer_status); + if (ret) { + dev_err(qmc_hdlc->dev, "get framer status failed (%d)\n", ret); + goto framer_power_off; + } + + qmc_hdlc->nb.notifier_call = qmc_hdlc_framer_notifier; + ret = framer_notifier_register(qmc_hdlc->framer, &qmc_hdlc->nb); + if (ret) { + dev_err(qmc_hdlc->dev, "framer notifier register failed (%d)\n", ret); + goto framer_power_off; + } + + return 0; + +framer_power_off: + framer_power_off(qmc_hdlc->framer); + return ret; +} + +static void qmc_hdlc_framer_stop(struct qmc_hdlc *qmc_hdlc) +{ + if (!qmc_hdlc->framer) + return; + + framer_notifier_unregister(qmc_hdlc->framer, &qmc_hdlc->nb); + framer_power_off(qmc_hdlc->framer); +} + +static int qmc_hdlc_framer_set_iface(struct qmc_hdlc *qmc_hdlc, int if_iface, + const te1_settings *te1) +{ + struct framer_config config; + int ret; + + if (!qmc_hdlc->framer) + return 0; + + ret = framer_get_config(qmc_hdlc->framer, &config); + if (ret) + return ret; + + switch (if_iface) { + case IF_IFACE_E1: + config.iface = FRAMER_IFACE_E1; + break; + case IF_IFACE_T1: + config.iface = FRAMER_IFACE_T1; + break; + default: + return -EINVAL; + } + + switch (te1->clock_type) { + case CLOCK_DEFAULT: + /* Keep current value */ + break; + case CLOCK_EXT: + config.clock_type = FRAMER_CLOCK_EXT; + break; + case CLOCK_INT: + config.clock_type = FRAMER_CLOCK_INT; + break; + default: + return -EINVAL; + } + config.line_clock_rate = te1->clock_rate; + + return framer_set_config(qmc_hdlc->framer, &config); +} + +static int qmc_hdlc_framer_get_iface(struct qmc_hdlc *qmc_hdlc, int *if_iface, te1_settings *te1) +{ + struct framer_config config; + int ret; + + if (!qmc_hdlc->framer) { + *if_iface = IF_IFACE_E1; + return 0; + } + + ret = framer_get_config(qmc_hdlc->framer, &config); + if (ret) + return ret; + + switch (config.iface) { + case FRAMER_IFACE_E1: + *if_iface = IF_IFACE_E1; + break; + case FRAMER_IFACE_T1: + *if_iface = IF_IFACE_T1; + break; + } + + if (!te1) + return 0; /* Only iface type requested */ + + switch (config.clock_type) { + case FRAMER_CLOCK_EXT: + te1->clock_type = CLOCK_EXT; + break; + case FRAMER_CLOCK_INT: + te1->clock_type = CLOCK_INT; + break; + default: + return -EINVAL; + } + te1->clock_rate = config.line_clock_rate; + return 0; +} + +static int qmc_hdlc_framer_init(struct qmc_hdlc *qmc_hdlc) +{ + int ret; + + if (!qmc_hdlc->framer) + return 0; + + ret = framer_init(qmc_hdlc->framer); + if (ret) { + dev_err(qmc_hdlc->dev, "framer init failed (%d)\n", ret); + return ret; + } + + return 0; +} + +static void qmc_hdlc_framer_exit(struct qmc_hdlc *qmc_hdlc) +{ + if (!qmc_hdlc->framer) + return; + + framer_exit(qmc_hdlc->framer); +} + static int qmc_hdlc_recv_queue(struct qmc_hdlc *qmc_hdlc, struct qmc_hdlc_desc *desc, size_t size); #define QMC_HDLC_RX_ERROR_FLAGS (QMC_RX_FLAG_HDLC_OVF | \ @@ -313,6 +506,12 @@ static int qmc_hdlc_set_iface(struct qmc_hdlc *qmc_hdlc, int if_iface, const te1 qmc_hdlc->slot_map = te1->slot_map; + ret = qmc_hdlc_framer_set_iface(qmc_hdlc, if_iface, te1); + if (ret) { + dev_err(qmc_hdlc->dev, "framer set iface failed %d\n", ret); + return ret; + } + return 0; } @@ -320,11 +519,16 @@ static int qmc_hdlc_ioctl(struct net_device *netdev, struct if_settings *ifs) { struct qmc_hdlc *qmc_hdlc = netdev_to_qmc_hdlc(netdev); te1_settings te1; + int ret; switch (ifs->type) { case IF_GET_IFACE: - ifs->type = IF_IFACE_E1; if (ifs->size < sizeof(te1)) { + /* Retrieve type only */ + ret = qmc_hdlc_framer_get_iface(qmc_hdlc, &ifs->type, NULL); + if (ret) + return ret; + if (!ifs->size) return 0; /* only type requested */ @@ -334,6 +538,11 @@ static int qmc_hdlc_ioctl(struct net_device *netdev, struct if_settings *ifs) memset(&te1, 0, sizeof(te1)); + /* Retrieve info from framer */ + ret = qmc_hdlc_framer_get_iface(qmc_hdlc, &ifs->type, &te1); + if (ret) + return ret; + /* Update slot_map */ te1.slot_map = qmc_hdlc->slot_map; @@ -367,10 +576,17 @@ static int qmc_hdlc_open(struct net_device *netdev) int ret; int i; - ret = hdlc_open(netdev); + ret = qmc_hdlc_framer_start(qmc_hdlc); if (ret) return ret; + ret = hdlc_open(netdev); + if (ret) + goto framer_stop; + + /* Update carrier */ + qmc_hdlc_framer_set_carrier(qmc_hdlc); + chan_param.mode = QMC_HDLC; /* HDLC_MAX_MRU + 4 for the CRC * HDLC_MAX_MRU + 4 + 8 for the CRC and some extraspace needed by the QMC @@ -420,6 +636,8 @@ static int qmc_hdlc_open(struct net_device *netdev) } hdlc_close: hdlc_close(netdev); +framer_stop: + qmc_hdlc_framer_stop(qmc_hdlc); return ret; } @@ -455,6 +673,7 @@ static int qmc_hdlc_close(struct net_device *netdev) } hdlc_close(netdev); + qmc_hdlc_framer_stop(qmc_hdlc); return 0; } @@ -503,6 +722,7 @@ static int qmc_hdlc_probe(struct platform_device *pdev) qmc_hdlc->dev = &pdev->dev; spin_lock_init(&qmc_hdlc->tx_lock); + spin_lock_init(&qmc_hdlc->carrier_lock); qmc_hdlc->qmc_chan = devm_qmc_chan_get_bychild(qmc_hdlc->dev, np); if (IS_ERR(qmc_hdlc->qmc_chan)) { @@ -531,10 +751,19 @@ static int qmc_hdlc_probe(struct platform_device *pdev) if (ret) return ret; + qmc_hdlc->framer = devm_framer_optional_get(qmc_hdlc->dev, "fsl,framer"); + if (IS_ERR(qmc_hdlc->framer)) + return PTR_ERR(qmc_hdlc->framer); + + ret = qmc_hdlc_framer_init(qmc_hdlc); + if (ret) + return ret; + qmc_hdlc->netdev = alloc_hdlcdev(qmc_hdlc); if (!qmc_hdlc->netdev) { dev_err(qmc_hdlc->dev, "failed to alloc hdlc dev\n"); - return -ENOMEM; + ret = -ENOMEM; + goto framer_exit; } hdlc = dev_to_hdlc(qmc_hdlc->netdev); @@ -550,11 +779,12 @@ static int qmc_hdlc_probe(struct platform_device *pdev) } platform_set_drvdata(pdev, qmc_hdlc); - return 0; free_netdev: free_netdev(qmc_hdlc->netdev); +framer_exit: + qmc_hdlc_framer_exit(qmc_hdlc); return ret; } @@ -564,6 +794,7 @@ static int qmc_hdlc_remove(struct platform_device *pdev) unregister_hdlc_device(qmc_hdlc->netdev); free_netdev(qmc_hdlc->netdev); + qmc_hdlc_framer_exit(qmc_hdlc); return 0; }