From patchwork Wed Nov 15 14:39:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13456981 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5EF84C2BB3F for ; Wed, 15 Nov 2023 15:46:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kwEU8Z2LERBe39l5epx1qExybmiLjMVsj/ESqkEKDP4=; b=0fGn3fzxeEIcGT fwV6s60WK18oGYbX50kDi8Hs+5vEOt8lxweEUWcfHK3aqRXr/WIcDHHT/kyWbrUu3RUHzgmEPEDoy 3lWCvmUMHwtq/mlAMVeGqK7BYCaeeR8UP3LjgUCZ0LQA4M1SeFj6aFG3KAMZ9DhqmSjuLhHnNXmO+ YLAILvfuI6KKFnJqbk4E2pIWGgO9FAhuGqwsKlJvHBP3G7D1Ai0KT1dC8bDgA9IWx4FaH/T9Us4XW P6ojt0EwA8J42fS8xaekfboMNLhqC1yeLublQSf8KcuKIyLGIv0MBWNli0bk/eoc7KnZ/QLR87wrY J6WZ4eNxbfLezI5Usqiw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r3I5J-001DLl-1m; Wed, 15 Nov 2023 15:45:45 +0000 Received: from relay9-d.mail.gandi.net ([2001:4b98:dc4:8::229]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r3H4O-0011yz-2l for linux-arm-kernel@lists.infradead.org; Wed, 15 Nov 2023 14:40:47 +0000 Received: by mail.gandi.net (Postfix) with ESMTPA id BBF09FF815; Wed, 15 Nov 2023 14:40:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1700059243; 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=Xk8Fb3w4AeRYum/fguu/ZBOmxJ7GnKoRFliVvscmStA=; b=knE7Ny7UV59CCH2bTKdlJLfKPVIn710mTT8k9U5M+LlwfhHabYedW6x5UlZAGiziykLOtC N1nXIXIKZkIv+PWBCxWEakh5fXDQwv7W1epzfImZ2lhdp9DEIFu9WyboH1eQZ4EuXkJKzD QUeiGsYK6S47/mBeRoxevetUOaZr28VtbwIgDARldTkC4slPiPwdYcydLYW4tuZm/+vUDq DqXOUCe0V052+xj9RbyJ76T6KiEx7K2+LeXVGTDDnHYi1CsiQ/fznI1DsG4i6Lu2ZSN9Yn gRWHCcCTtmg6eT6agzjHZrleEv7KDgS3Wm3Y+MqpLoXGextxXigE5i6Xu6AcKQ== From: Herve Codina To: Herve Codina , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lee Jones , 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 v9 17/27] soc: fsl: cpm1: qmc: Handle timeslot entries at channel start() and stop() Date: Wed, 15 Nov 2023 15:39:53 +0100 Message-ID: <20231115144007.478111-18-herve.codina@bootlin.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231115144007.478111-1-herve.codina@bootlin.com> References: <20231115144007.478111-1-herve.codina@bootlin.com> MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231115_064045_199357_91D5A053 X-CRM114-Status: GOOD ( 18.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In order to support runtime timeslot route changes, enable the channel timeslot entries at channel start() and disable them at channel stop(). Signed-off-by: Herve Codina Reviewed-by: Christophe Leroy --- drivers/soc/fsl/qe/qmc.c | 175 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 163 insertions(+), 12 deletions(-) diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index e651b3bba1ca..e56aea5803bf 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -177,6 +177,7 @@ struct qmc_chan { struct qmc *qmc; void __iomem *s_param; enum qmc_mode mode; + spinlock_t ts_lock; /* Protect timeslots */ u64 tx_ts_mask_avail; u64 tx_ts_mask; u64 rx_ts_mask_avail; @@ -265,6 +266,7 @@ static void qmc_setbits32(void __iomem *addr, u32 set) int qmc_chan_get_info(struct qmc_chan *chan, struct qmc_chan_info *info) { struct tsa_serial_info tsa_info; + unsigned long flags; int ret; /* Retrieve info from the TSA related serial */ @@ -272,6 +274,8 @@ int qmc_chan_get_info(struct qmc_chan *chan, struct qmc_chan_info *info) if (ret) return ret; + spin_lock_irqsave(&chan->ts_lock, flags); + info->mode = chan->mode; info->rx_fs_rate = tsa_info.rx_fs_rate; info->rx_bit_rate = tsa_info.rx_bit_rate; @@ -280,6 +284,8 @@ int qmc_chan_get_info(struct qmc_chan *chan, struct qmc_chan_info *info) info->tx_bit_rate = tsa_info.tx_bit_rate; info->nb_rx_ts = hweight64(chan->rx_ts_mask); + spin_unlock_irqrestore(&chan->ts_lock, flags); + return 0; } EXPORT_SYMBOL(qmc_chan_get_info); @@ -683,6 +689,40 @@ static int qmc_chan_setup_tsa_32tx(struct qmc_chan *chan, const struct tsa_seria return 0; } +static int qmc_chan_setup_tsa_tx(struct qmc_chan *chan, bool enable) +{ + struct tsa_serial_info info; + int ret; + + /* Retrieve info from the TSA related serial */ + ret = tsa_serial_get_info(chan->qmc->tsa_serial, &info); + if (ret) + return ret; + + /* Setup entries */ + if (chan->qmc->is_tsa_64rxtx) + return qmc_chan_setup_tsa_64rxtx(chan, &info, enable); + + return qmc_chan_setup_tsa_32tx(chan, &info, enable); +} + +static int qmc_chan_setup_tsa_rx(struct qmc_chan *chan, bool enable) +{ + struct tsa_serial_info info; + int ret; + + /* Retrieve info from the TSA related serial */ + ret = tsa_serial_get_info(chan->qmc->tsa_serial, &info); + if (ret) + return ret; + + /* Setup entries */ + if (chan->qmc->is_tsa_64rxtx) + return qmc_chan_setup_tsa_64rxtx(chan, &info, enable); + + return qmc_chan_setup_tsa_32rx(chan, &info, enable); +} + static int qmc_chan_setup_tsa(struct qmc_chan *chan, bool enable) { struct tsa_serial_info info; @@ -719,6 +759,12 @@ static int qmc_chan_stop_rx(struct qmc_chan *chan) spin_lock_irqsave(&chan->rx_lock, flags); + if (chan->is_rx_stopped) { + /* The channel is already stopped -> simply return ok */ + ret = 0; + goto end; + } + /* Send STOP RECEIVE command */ ret = qmc_chan_command(chan, 0x0); if (ret) { @@ -729,6 +775,15 @@ static int qmc_chan_stop_rx(struct qmc_chan *chan) chan->is_rx_stopped = true; + if (!chan->qmc->is_tsa_64rxtx || chan->is_tx_stopped) { + ret = qmc_chan_setup_tsa_rx(chan, false); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: Disable tsa entries failed (%d)\n", + chan->id, ret); + goto end; + } + } + end: spin_unlock_irqrestore(&chan->rx_lock, flags); return ret; @@ -741,6 +796,12 @@ static int qmc_chan_stop_tx(struct qmc_chan *chan) spin_lock_irqsave(&chan->tx_lock, flags); + if (chan->is_tx_stopped) { + /* The channel is already stopped -> simply return ok */ + ret = 0; + goto end; + } + /* Send STOP TRANSMIT command */ ret = qmc_chan_command(chan, 0x1); if (ret) { @@ -751,37 +812,82 @@ static int qmc_chan_stop_tx(struct qmc_chan *chan) chan->is_tx_stopped = true; + if (!chan->qmc->is_tsa_64rxtx || chan->is_rx_stopped) { + ret = qmc_chan_setup_tsa_tx(chan, false); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: Disable tsa entries failed (%d)\n", + chan->id, ret); + goto end; + } + } + end: spin_unlock_irqrestore(&chan->tx_lock, flags); return ret; } +static int qmc_chan_start_rx(struct qmc_chan *chan); + int qmc_chan_stop(struct qmc_chan *chan, int direction) { - int ret; + bool is_rx_rollback_needed = false; + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&chan->ts_lock, flags); if (direction & QMC_CHAN_READ) { + is_rx_rollback_needed = !chan->is_rx_stopped; ret = qmc_chan_stop_rx(chan); if (ret) - return ret; + goto end; } if (direction & QMC_CHAN_WRITE) { ret = qmc_chan_stop_tx(chan); - if (ret) - return ret; + if (ret) { + /* Restart rx if needed */ + if (is_rx_rollback_needed) + qmc_chan_start_rx(chan); + goto end; + } } - return 0; +end: + spin_unlock_irqrestore(&chan->ts_lock, flags); + return ret; } EXPORT_SYMBOL(qmc_chan_stop); -static void qmc_chan_start_rx(struct qmc_chan *chan) +static int qmc_setup_chan_trnsync(struct qmc *qmc, struct qmc_chan *chan); + +static int qmc_chan_start_rx(struct qmc_chan *chan) { unsigned long flags; + int ret; spin_lock_irqsave(&chan->rx_lock, flags); + if (!chan->is_rx_stopped) { + /* The channel is already started -> simply return ok */ + ret = 0; + goto end; + } + + ret = qmc_chan_setup_tsa_rx(chan, true); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: Enable tsa entries failed (%d)\n", + chan->id, ret); + goto end; + } + + ret = qmc_setup_chan_trnsync(chan->qmc, chan); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: setup TRNSYNC failed (%d)\n", + chan->id, ret); + goto end; + } + /* Restart the receiver */ if (chan->mode == QMC_TRANSPARENT) qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); @@ -792,15 +898,38 @@ static void qmc_chan_start_rx(struct qmc_chan *chan) chan->is_rx_stopped = false; +end: spin_unlock_irqrestore(&chan->rx_lock, flags); + return ret; } -static void qmc_chan_start_tx(struct qmc_chan *chan) +static int qmc_chan_start_tx(struct qmc_chan *chan) { unsigned long flags; + int ret; spin_lock_irqsave(&chan->tx_lock, flags); + if (!chan->is_tx_stopped) { + /* The channel is already started -> simply return ok */ + ret = 0; + goto end; + } + + ret = qmc_chan_setup_tsa_tx(chan, true); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: Enable tsa entries failed (%d)\n", + chan->id, ret); + goto end; + } + + ret = qmc_setup_chan_trnsync(chan->qmc, chan); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: setup TRNSYNC failed (%d)\n", + chan->id, ret); + goto end; + } + /* * Enable channel transmitter as it could be disabled if * qmc_chan_reset() was called. @@ -812,18 +941,39 @@ static void qmc_chan_start_tx(struct qmc_chan *chan) chan->is_tx_stopped = false; +end: spin_unlock_irqrestore(&chan->tx_lock, flags); + return ret; } int qmc_chan_start(struct qmc_chan *chan, int direction) { - if (direction & QMC_CHAN_READ) - qmc_chan_start_rx(chan); + bool is_rx_rollback_needed = false; + unsigned long flags; + int ret = 0; - if (direction & QMC_CHAN_WRITE) - qmc_chan_start_tx(chan); + spin_lock_irqsave(&chan->ts_lock, flags); - return 0; + if (direction & QMC_CHAN_READ) { + is_rx_rollback_needed = chan->is_rx_stopped; + ret = qmc_chan_start_rx(chan); + if (ret) + goto end; + } + + if (direction & QMC_CHAN_WRITE) { + ret = qmc_chan_start_tx(chan); + if (ret) { + /* Restop rx if needed */ + if (is_rx_rollback_needed) + qmc_chan_stop_rx(chan); + goto end; + } + } + +end: + spin_unlock_irqrestore(&chan->ts_lock, flags); + return ret; } EXPORT_SYMBOL(qmc_chan_start); @@ -992,6 +1142,7 @@ static int qmc_of_parse_chans(struct qmc *qmc, struct device_node *np) } chan->id = chan_id; + spin_lock_init(&chan->ts_lock); spin_lock_init(&chan->rx_lock); spin_lock_init(&chan->tx_lock);