From patchwork Sun Sep 25 18:46:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Horatiu Vultur X-Patchwork-Id: 12988095 X-Patchwork-Delegate: kuba@kernel.org 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B617CC6FA8E for ; Sun, 25 Sep 2022 18:44:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233060AbiIYSoC (ORCPT ); Sun, 25 Sep 2022 14:44:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60944 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232911AbiIYSn7 (ORCPT ); Sun, 25 Sep 2022 14:43:59 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 356052BB11; Sun, 25 Sep 2022 11:43:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1664131439; x=1695667439; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VBQtjjcrTK7mwX/oS7iE3MG3Uz5ZFhiEyItlldgGuhw=; b=B8viJUZLuqjNlOJEio6UvSh42qVg73+IYTesc8Mm+Sl6bR8sOUMZ0bBd RFrz6kVTb4ydGPtRn9H73gsGziKSiOnwE8eNfKA6JgBGM0x3f+gB9HayR 4QmVro70ky1DvC06GTXtnqo296Wq6e88K7X+86J25rpCY6ptjnfv6APEh GwozVvte3/AUaDgk1L4jjVl74203hYWG3PFb1AXuJHXhUPLYnSPKncNOX DvH+uTXUdgNZDpFhxYodpXa7W/Swc2SZeyggGj2QaSsj8Q1Ip1vdP2CBw jx3S5D2roFRBg+nlTFh8ldtZfOV6TOWjVQtSkKy4CSJ+bCBwKEvDBg148 Q==; X-IronPort-AV: E=Sophos;i="5.93,344,1654585200"; d="scan'208";a="175499144" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 25 Sep 2022 11:43:58 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Sun, 25 Sep 2022 11:43:57 -0700 Received: from soft-dev3-1.microsemi.net (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Sun, 25 Sep 2022 11:43:55 -0700 From: Horatiu Vultur To: , CC: , , , , , Horatiu Vultur Subject: [PATCH net-next 2/3] net: lan966x: Add offload support for cbs Date: Sun, 25 Sep 2022 20:46:32 +0200 Message-ID: <20220925184633.4148143-3-horatiu.vultur@microchip.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20220925184633.4148143-1-horatiu.vultur@microchip.com> References: <20220925184633.4148143-1-horatiu.vultur@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Lan966x switch supports credit based shaper in hardware according to IEEE Std 802.1Q-2018 Section 8.6.8.2. Add support for cbs configuration on egress port of lan966x switch. Signed-off-by: Horatiu Vultur --- .../net/ethernet/microchip/lan966x/Makefile | 2 +- .../ethernet/microchip/lan966x/lan966x_cbs.c | 70 +++++++++++++++++++ .../ethernet/microchip/lan966x/lan966x_main.h | 5 ++ .../ethernet/microchip/lan966x/lan966x_tc.c | 9 +++ 4 files changed, 85 insertions(+), 1 deletion(-) create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_cbs.c diff --git a/drivers/net/ethernet/microchip/lan966x/Makefile b/drivers/net/ethernet/microchip/lan966x/Makefile index a3a519d10c73d..bc76949d1fd8f 100644 --- a/drivers/net/ethernet/microchip/lan966x/Makefile +++ b/drivers/net/ethernet/microchip/lan966x/Makefile @@ -10,4 +10,4 @@ lan966x-switch-objs := lan966x_main.o lan966x_phylink.o lan966x_port.o \ lan966x_vlan.o lan966x_fdb.o lan966x_mdb.o \ lan966x_ptp.o lan966x_fdma.o lan966x_lag.o \ lan966x_tc.o lan966x_mqprio.o lan966x_taprio.o \ - lan966x_tbf.o + lan966x_tbf.o lan966x_cbs.o diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_cbs.c b/drivers/net/ethernet/microchip/lan966x/lan966x_cbs.c new file mode 100644 index 0000000000000..70cbbf8d2b67b --- /dev/null +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_cbs.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include "lan966x_main.h" + +int lan966x_cbs_add(struct lan966x_port *port, + struct tc_cbs_qopt_offload *qopt) +{ + struct lan966x *lan966x = port->lan966x; + u32 cir, cbs; + u8 se_idx; + + /* Check for invalid values */ + if (qopt->idleslope <= 0 || + qopt->sendslope >= 0 || + qopt->locredit >= qopt->hicredit) + return -EINVAL; + + se_idx = SE_IDX_QUEUE + port->chip_port * NUM_PRIO_QUEUES + qopt->queue; + cir = qopt->idleslope; + cbs = (qopt->idleslope - qopt->sendslope) * + (qopt->hicredit - qopt->locredit) / + -qopt->sendslope; + + /* Rate unit is 100 kbps */ + cir = DIV_ROUND_UP(cir, 100); + /* Avoid using zero rate */ + cir = cir ?: 1; + /* Burst unit is 4kB */ + cbs = DIV_ROUND_UP(cbs, 4096); + /* Avoid using zero burst */ + cbs = cbs ?: 1; + + /* Check that actually the result can be written */ + if (cir > GENMASK(15, 0) || + cbs > GENMASK(6, 0)) + return -EINVAL; + + lan_rmw(QSYS_SE_CFG_SE_AVB_ENA_SET(1) | + QSYS_SE_CFG_SE_FRM_MODE_SET(1), + QSYS_SE_CFG_SE_AVB_ENA | + QSYS_SE_CFG_SE_FRM_MODE, + lan966x, QSYS_SE_CFG(se_idx)); + + lan_wr(QSYS_CIR_CFG_CIR_RATE_SET(cir) | + QSYS_CIR_CFG_CIR_BURST_SET(cbs), + lan966x, QSYS_CIR_CFG(se_idx)); + + return 0; +} + +int lan966x_cbs_del(struct lan966x_port *port, + struct tc_cbs_qopt_offload *qopt) +{ + struct lan966x *lan966x = port->lan966x; + u8 se_idx; + + se_idx = SE_IDX_QUEUE + port->chip_port * NUM_PRIO_QUEUES + qopt->queue; + + lan_rmw(QSYS_SE_CFG_SE_AVB_ENA_SET(1) | + QSYS_SE_CFG_SE_FRM_MODE_SET(0), + QSYS_SE_CFG_SE_AVB_ENA | + QSYS_SE_CFG_SE_FRM_MODE, + lan966x, QSYS_SE_CFG(se_idx)); + + lan_wr(QSYS_CIR_CFG_CIR_RATE_SET(0) | + QSYS_CIR_CFG_CIR_BURST_SET(0), + lan966x, QSYS_CIR_CFG(se_idx)); + + return 0; +} diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h index 59f5a6b2b3bc0..168456f693bb7 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h @@ -471,6 +471,11 @@ int lan966x_tbf_add(struct lan966x_port *port, int lan966x_tbf_del(struct lan966x_port *port, struct tc_tbf_qopt_offload *qopt); +int lan966x_cbs_add(struct lan966x_port *port, + struct tc_cbs_qopt_offload *qopt); +int lan966x_cbs_del(struct lan966x_port *port, + struct tc_cbs_qopt_offload *qopt); + static inline void __iomem *lan_addr(void __iomem *base[], int id, int tinst, int tcnt, int gbase, int ginst, diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c b/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c index ca03b7842f05f..4b05535c9e029 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c @@ -37,6 +37,13 @@ static int lan966x_tc_setup_qdisc_tbf(struct lan966x_port *port, return -EOPNOTSUPP; } +static int lan966x_tc_setup_qdisc_cbs(struct lan966x_port *port, + struct tc_cbs_qopt_offload *qopt) +{ + return qopt->enable ? lan966x_cbs_add(port, qopt) : + lan966x_cbs_del(port, qopt); +} + int lan966x_tc_setup(struct net_device *dev, enum tc_setup_type type, void *type_data) { @@ -49,6 +56,8 @@ int lan966x_tc_setup(struct net_device *dev, enum tc_setup_type type, return lan966x_tc_setup_qdisc_taprio(port, type_data); case TC_SETUP_QDISC_TBF: return lan966x_tc_setup_qdisc_tbf(port, type_data); + case TC_SETUP_QDISC_CBS: + return lan966x_tc_setup_qdisc_cbs(port, type_data); default: return -EOPNOTSUPP; }