From patchwork Wed Nov 15 14:39:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 744502 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D24C63BB29; Wed, 15 Nov 2023 14:41:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="HL2dKK2z" Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07996172A; Wed, 15 Nov 2023 06:40:49 -0800 (PST) Received: by mail.gandi.net (Postfix) with ESMTPA id 07803FF803; Wed, 15 Nov 2023 14:40:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1700059248; 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=SGF89ZCYezlZWmq78kTfI4brS8VrvrfhKyUmQvSBdcg=; b=HL2dKK2zg/K3Ef2EC1R35mzC5Hj6IyWQ88hGmmTf3Wl8NcJKB7hnsOTFIT2HmfK9gl8qE0 ro/DRjEKuP1LCrtWsbqc06TLauKd4IjsQbatOHyVyx0mNOh0ZN78wVvjluI+dAd8eSVgEX qQW67++KMWTg2IdjEDyWbPzBBTFM8W2oAEq9a91cN3bRoGQ0h61lkQEEi7bBci++/9I/Bk JN+3aW7wyoBGP53fbFO+mBR7RmhzeEsDWL/HsBHmw+oFCFekoZYb+n4H5BLwFG2zh8SOxW w8GZ/AeronnKm9a1DVj8IntjL/+INN8PxeJqtzJqWdkCdTyhZ8vFyhECLkBHRQ== 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 20/27] wan: qmc_hdlc: Add runtime timeslots changes support Date: Wed, 15 Nov 2023 15:39:56 +0100 Message-ID: <20231115144007.478111-21-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> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com QMC channels support runtime timeslots changes but nothing is done at the QMC HDLC driver to handle these changes. Use existing IFACE ioctl in order to configure the timeslots to use. Signed-off-by: Herve Codina Reviewed-by: Christophe Leroy Acked-by: Jakub Kicinski --- drivers/net/wan/fsl_qmc_hdlc.c | 169 ++++++++++++++++++++++++++++++++- 1 file changed, 168 insertions(+), 1 deletion(-) diff --git a/drivers/net/wan/fsl_qmc_hdlc.c b/drivers/net/wan/fsl_qmc_hdlc.c index 31b637ec8390..82019cd96365 100644 --- a/drivers/net/wan/fsl_qmc_hdlc.c +++ b/drivers/net/wan/fsl_qmc_hdlc.c @@ -32,6 +32,7 @@ struct qmc_hdlc { struct qmc_hdlc_desc tx_descs[8]; unsigned int tx_out; struct qmc_hdlc_desc rx_descs[4]; + u32 slot_map; }; static inline struct qmc_hdlc *netdev_to_qmc_hdlc(struct net_device *netdev) @@ -202,6 +203,162 @@ static netdev_tx_t qmc_hdlc_xmit(struct sk_buff *skb, struct net_device *netdev) return NETDEV_TX_OK; } +static int qmc_hdlc_xlate_slot_map(struct qmc_hdlc *qmc_hdlc, + u32 slot_map, struct qmc_chan_ts_info *ts_info) +{ + u64 ts_mask_avail; + unsigned int bit; + unsigned int i; + u64 ts_mask; + u64 map; + + /* Tx and Rx masks must be identical */ + if (ts_info->rx_ts_mask_avail != ts_info->tx_ts_mask_avail) { + dev_err(qmc_hdlc->dev, "tx and rx available timeslots mismatch (0x%llx, 0x%llx)\n", + ts_info->rx_ts_mask_avail, ts_info->tx_ts_mask_avail); + return -EINVAL; + } + + ts_mask_avail = ts_info->rx_ts_mask_avail; + ts_mask = 0; + map = slot_map; + bit = 0; + for (i = 0; i < 64; i++) { + if (ts_mask_avail & BIT_ULL(i)) { + if (map & BIT_ULL(bit)) + ts_mask |= BIT_ULL(i); + bit++; + } + } + + if (hweight64(ts_mask) != hweight64(map)) { + dev_err(qmc_hdlc->dev, "Cannot translate timeslots 0x%llx -> (0x%llx,0x%llx)\n", + map, ts_mask_avail, ts_mask); + return -EINVAL; + } + + ts_info->tx_ts_mask = ts_mask; + ts_info->rx_ts_mask = ts_mask; + return 0; +} + +static int qmc_hdlc_xlate_ts_info(struct qmc_hdlc *qmc_hdlc, + const struct qmc_chan_ts_info *ts_info, u32 *slot_map) +{ + u64 ts_mask_avail; + unsigned int bit; + unsigned int i; + u64 ts_mask; + u64 map; + + /* Tx and Rx masks must be identical */ + if (ts_info->rx_ts_mask_avail != ts_info->tx_ts_mask_avail) { + dev_err(qmc_hdlc->dev, "tx and rx available timeslots mismatch (0x%llx, 0x%llx)\n", + ts_info->rx_ts_mask_avail, ts_info->tx_ts_mask_avail); + return -EINVAL; + } + if (ts_info->rx_ts_mask != ts_info->tx_ts_mask) { + dev_err(qmc_hdlc->dev, "tx and rx timeslots mismatch (0x%llx, 0x%llx)\n", + ts_info->rx_ts_mask, ts_info->tx_ts_mask); + return -EINVAL; + } + + ts_mask_avail = ts_info->rx_ts_mask_avail; + ts_mask = ts_info->rx_ts_mask; + map = 0; + bit = 0; + for (i = 0; i < 64; i++) { + if (ts_mask_avail & BIT_ULL(i)) { + if (ts_mask & BIT_ULL(i)) + map |= BIT_ULL(bit); + bit++; + } + } + + if (hweight64(ts_mask) != hweight64(map)) { + dev_err(qmc_hdlc->dev, "Cannot translate timeslots (0x%llx,0x%llx) -> 0x%llx\n", + ts_mask_avail, ts_mask, map); + return -EINVAL; + } + + if (map >= BIT_ULL(32)) { + dev_err(qmc_hdlc->dev, "Slot map out of 32bit (0x%llx,0x%llx) -> 0x%llx\n", + ts_mask_avail, ts_mask, map); + return -EINVAL; + } + + *slot_map = map; + return 0; +} + +static int qmc_hdlc_set_iface(struct qmc_hdlc *qmc_hdlc, int if_iface, const te1_settings *te1) +{ + struct qmc_chan_ts_info ts_info; + int ret; + + ret = qmc_chan_get_ts_info(qmc_hdlc->qmc_chan, &ts_info); + if (ret) { + dev_err(qmc_hdlc->dev, "get QMC channel ts info failed %d\n", ret); + return ret; + } + ret = qmc_hdlc_xlate_slot_map(qmc_hdlc, te1->slot_map, &ts_info); + if (ret) + return ret; + + ret = qmc_chan_set_ts_info(qmc_hdlc->qmc_chan, &ts_info); + if (ret) { + dev_err(qmc_hdlc->dev, "set QMC channel ts info failed %d\n", ret); + return ret; + } + + qmc_hdlc->slot_map = te1->slot_map; + + return 0; +} + +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; + + switch (ifs->type) { + case IF_GET_IFACE: + ifs->type = IF_IFACE_E1; + if (ifs->size < sizeof(te1)) { + if (!ifs->size) + return 0; /* only type requested */ + + ifs->size = sizeof(te1); /* data size wanted */ + return -ENOBUFS; + } + + memset(&te1, 0, sizeof(te1)); + + /* Update slot_map */ + te1.slot_map = qmc_hdlc->slot_map; + + if (copy_to_user(ifs->ifs_ifsu.te1, &te1, sizeof(te1))) + return -EFAULT; + return 0; + + case IF_IFACE_E1: + case IF_IFACE_T1: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + if (netdev->flags & IFF_UP) + return -EBUSY; + + if (copy_from_user(&te1, ifs->ifs_ifsu.te1, sizeof(te1))) + return -EFAULT; + + return qmc_hdlc_set_iface(qmc_hdlc, ifs->type, &te1); + + default: + return hdlc_ioctl(netdev, ifs); + } +} + static int qmc_hdlc_open(struct net_device *netdev) { struct qmc_hdlc *qmc_hdlc = netdev_to_qmc_hdlc(netdev); @@ -328,13 +485,14 @@ static const struct net_device_ops qmc_hdlc_netdev_ops = { .ndo_open = qmc_hdlc_open, .ndo_stop = qmc_hdlc_close, .ndo_start_xmit = hdlc_start_xmit, - .ndo_siocwandev = hdlc_ioctl, + .ndo_siocwandev = qmc_hdlc_ioctl, }; static int qmc_hdlc_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct qmc_hdlc *qmc_hdlc; + struct qmc_chan_ts_info ts_info; struct qmc_chan_info info; hdlc_device *hdlc; int ret; @@ -364,6 +522,15 @@ static int qmc_hdlc_probe(struct platform_device *pdev) return -EINVAL; } + ret = qmc_chan_get_ts_info(qmc_hdlc->qmc_chan, &ts_info); + if (ret) { + dev_err(qmc_hdlc->dev, "get QMC channel ts info failed %d\n", ret); + return ret; + } + ret = qmc_hdlc_xlate_ts_info(qmc_hdlc, &ts_info, &qmc_hdlc->slot_map); + 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");