From patchwork Sun Feb 9 14:29:38 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jie Luo X-Patchwork-Id: 13966943 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 29FB11DE4FE; Sun, 9 Feb 2025 14:30:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739111434; cv=none; b=QQ6aEBE2ospB9pihGr2R9gCNc/7P8TPbVTGWFNNoP8QZ0qlTWdTG2MhIWQnWnx1o7YCu0NZFlpdfC1NzZvQBqcO8IUlQMiNfCuQWZg+vlM274N6E/FmyoKEkreQe3mqHuPQZO73sU6ZlG4TZrJnbzDPNlxB40OrdvDO22TwozPM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739111434; c=relaxed/simple; bh=d9FX/D9ltnW9jixy2v8O/OpB8xePZBFVJbKbVEEbvo8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=CDmRuq6FY4h5YzxUufGiyARAUzsJl2zhnE8qXm+GDZE+hzLW2XIRscEQQiDcLZbvwyn5byD3ORJCin//1IKyh2niEbCh+tFMj4rmM9uMkW7vwW8ZsD6OJtvQ820DurXmVm4L1KA9UOFpd0F53vf2UyKEKRMZ/BW8qRAcJO86b8s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=ZQ3ZfD+g; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="ZQ3ZfD+g" Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 519Ds0x0021445; Sun, 9 Feb 2025 14:30:18 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= eUd+Ddtyf7t6GKYYxY64US3Bs6RSVTi05YeE/Kr0Y04=; b=ZQ3ZfD+gV3OYr4K8 enh42EI3jboSeuhxaO5u9MSROQriJ5g++KrlaTkYiA0QRuRNziBL9AkfpVeX39bT v4BHd2cYYwzbFJ4/bmqhQiZBX7B3k5UCv9QVx36rQDjOziNSGlkzwR81YoadFqZs RWXx3X5iqJc9SG367VLCc2ZPBI5vo4vrZiWwHFtIMT1EjWb810O2xh5mCGsOW+lu HNBQRJKXEXZqkiQkBAd4JrP/mfBzpayXVktlgILiE6qygHuVYvQricusTJG3Cy77 /0xncvbLG/H0tnVAGa23Aq/Wg5sB6TQ4XWxuhfFVcnZDuWCfNCAvIN+IoVocFSUR sYGBPg== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 44p0g8t39q-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 09 Feb 2025 14:30:18 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 519EUHZn026421 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 9 Feb 2025 14:30:17 GMT Received: from nsssdc-sh01-lnx.ap.qualcomm.com (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Sun, 9 Feb 2025 06:30:11 -0800 From: Luo Jie Date: Sun, 9 Feb 2025 22:29:38 +0800 Subject: [PATCH net-next v3 04/14] net: ethernet: qualcomm: Initialize PPE buffer management for IPQ9574 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20250209-qcom_ipq_ppe-v3-4-453ea18d3271@quicinc.com> References: <20250209-qcom_ipq_ppe-v3-0-453ea18d3271@quicinc.com> In-Reply-To: <20250209-qcom_ipq_ppe-v3-0-453ea18d3271@quicinc.com> To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lei Wei , Suruchi Agarwal , Pavithra R , "Simon Horman" , Jonathan Corbet , Kees Cook , "Gustavo A. R. Silva" , "Philipp Zabel" CC: , , , , , , , , , , , Luo Jie X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1739111388; l=11582; i=quic_luoj@quicinc.com; s=20250209; h=from:subject:message-id; bh=d9FX/D9ltnW9jixy2v8O/OpB8xePZBFVJbKbVEEbvo8=; b=Dw8Zdlfq+bZlpBtDcJMGoNPH4N1uEZ2hsX8RB72S7BAGlKwgShSihNeINHDp2f3plLnWhTiax 3F0HY5I6viMDEUQ8TYRJravznx6DJ9tfA4oNGy52UDsXLMjvBigl7Gv X-Developer-Key: i=quic_luoj@quicinc.com; a=ed25519; pk=pzwy8bU5tJZ5UKGTv28n+QOuktaWuriznGmriA9Qkfc= X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Fkx4ER32TvAbdPhMGl5GvX2uFrctmbC9 X-Proofpoint-ORIG-GUID: Fkx4ER32TvAbdPhMGl5GvX2uFrctmbC9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-09_06,2025-02-07_03,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 adultscore=0 lowpriorityscore=0 phishscore=0 mlxscore=0 suspectscore=0 bulkscore=0 priorityscore=1501 spamscore=0 impostorscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2501170000 definitions=main-2502090128 The BM (Buffer Management) config controls the pause frame generated on the PPE port. There are maximum 15 BM ports and 4 groups supported, all BM ports are assigned to group 0 by default. The number of hardware buffers configured for the port influence the threshold of the flow control for that port. Signed-off-by: Luo Jie --- drivers/net/ethernet/qualcomm/ppe/Makefile | 2 +- drivers/net/ethernet/qualcomm/ppe/ppe.c | 5 + drivers/net/ethernet/qualcomm/ppe/ppe_config.c | 195 +++++++++++++++++++++++++ drivers/net/ethernet/qualcomm/ppe/ppe_config.h | 12 ++ drivers/net/ethernet/qualcomm/ppe/ppe_regs.h | 59 ++++++++ 5 files changed, 272 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/qualcomm/ppe/Makefile b/drivers/net/ethernet/qualcomm/ppe/Makefile index 63d50d3b4f2e..410a7bb54cfe 100644 --- a/drivers/net/ethernet/qualcomm/ppe/Makefile +++ b/drivers/net/ethernet/qualcomm/ppe/Makefile @@ -4,4 +4,4 @@ # obj-$(CONFIG_QCOM_PPE) += qcom-ppe.o -qcom-ppe-objs := ppe.o +qcom-ppe-objs := ppe.o ppe_config.o diff --git a/drivers/net/ethernet/qualcomm/ppe/ppe.c b/drivers/net/ethernet/qualcomm/ppe/ppe.c index 40da7d240594..253de6a15466 100644 --- a/drivers/net/ethernet/qualcomm/ppe/ppe.c +++ b/drivers/net/ethernet/qualcomm/ppe/ppe.c @@ -15,6 +15,7 @@ #include #include "ppe.h" +#include "ppe_config.h" #define PPE_PORT_MAX 8 #define PPE_CLK_RATE 353000000 @@ -194,6 +195,10 @@ static int qcom_ppe_probe(struct platform_device *pdev) if (ret) return dev_err_probe(dev, ret, "PPE clock config failed\n"); + ret = ppe_hw_config(ppe_dev); + if (ret) + return dev_err_probe(dev, ret, "PPE HW config failed\n"); + platform_set_drvdata(pdev, ppe_dev); return 0; diff --git a/drivers/net/ethernet/qualcomm/ppe/ppe_config.c b/drivers/net/ethernet/qualcomm/ppe/ppe_config.c new file mode 100644 index 000000000000..18e9544a4e37 --- /dev/null +++ b/drivers/net/ethernet/qualcomm/ppe/ppe_config.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2025 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +/* PPE HW initialization configs such as BM(buffer management), + * QM(queue management) and scheduler configs. + */ + +#include +#include +#include +#include + +#include "ppe.h" +#include "ppe_config.h" +#include "ppe_regs.h" + +/** + * struct ppe_bm_port_config - PPE BM port configuration. + * @port_id_start: The fist BM port ID to configure. + * @port_id_end: The last BM port ID to configure. + * @pre_alloc: BM port dedicated buffer number. + * @in_fly_buf: Buffer number for receiving the packet after pause frame sent. + * @ceil: Ceil to generate the back pressure. + * @weight: Weight value. + * @resume_offset: Resume offset from the threshold value. + * @resume_ceil: Ceil to resume from the back pressure state. + * @dynamic: Dynamic threshold used or not. + * + * The is for configuring the threshold that impacts the port + * flow control. + */ +struct ppe_bm_port_config { + unsigned int port_id_start; + unsigned int port_id_end; + unsigned int pre_alloc; + unsigned int in_fly_buf; + unsigned int ceil; + unsigned int weight; + unsigned int resume_offset; + unsigned int resume_ceil; + bool dynamic; +}; + +/* Assign the share buffer number 1550 to group 0 by default. */ +static const int ipq9574_ppe_bm_group_config = 1550; + +/* The buffer configurations per PPE port. There are 15 BM ports and + * 4 BM groups supported by PPE. BM port (0-7) is for EDMA port 0, + * BM port (8-13) is for PPE physical port 1-6 and BM port 14 is for + * EIP port. + */ +static const struct ppe_bm_port_config ipq9574_ppe_bm_port_config[] = { + { + /* Buffer configuration for the BM port ID 0 of EDMA. */ + .port_id_start = 0, + .port_id_end = 0, + .pre_alloc = 0, + .in_fly_buf = 100, + .ceil = 1146, + .weight = 7, + .resume_offset = 8, + .resume_ceil = 0, + .dynamic = true, + }, + { + /* Buffer configuration for the BM port ID 1-7 of EDMA. */ + .port_id_start = 1, + .port_id_end = 7, + .pre_alloc = 0, + .in_fly_buf = 100, + .ceil = 250, + .weight = 4, + .resume_offset = 36, + .resume_ceil = 0, + .dynamic = true, + }, + { + /* Buffer configuration for the BM port ID 8-13 of PPE ports. */ + .port_id_start = 8, + .port_id_end = 13, + .pre_alloc = 0, + .in_fly_buf = 128, + .ceil = 250, + .weight = 4, + .resume_offset = 36, + .resume_ceil = 0, + .dynamic = true, + }, + { + /* Buffer configuration for the BM port ID 14 of EIP. */ + .port_id_start = 14, + .port_id_end = 14, + .pre_alloc = 0, + .in_fly_buf = 40, + .ceil = 250, + .weight = 4, + .resume_offset = 36, + .resume_ceil = 0, + .dynamic = true, + }, +}; + +static int ppe_config_bm_threshold(struct ppe_device *ppe_dev, int bm_port_id, + const struct ppe_bm_port_config port_cfg) +{ + u32 reg, val, bm_fc_val[2]; + int ret; + + reg = PPE_BM_PORT_FC_CFG_TBL_ADDR + PPE_BM_PORT_FC_CFG_TBL_INC * bm_port_id; + ret = regmap_bulk_read(ppe_dev->regmap, reg, + bm_fc_val, ARRAY_SIZE(bm_fc_val)); + if (ret) + return ret; + + /* Configure BM flow control related threshold. */ + PPE_BM_PORT_FC_SET_WEIGHT(bm_fc_val, port_cfg.weight); + PPE_BM_PORT_FC_SET_RESUME_OFFSET(bm_fc_val, port_cfg.resume_offset); + PPE_BM_PORT_FC_SET_RESUME_THRESHOLD(bm_fc_val, port_cfg.resume_ceil); + PPE_BM_PORT_FC_SET_DYNAMIC(bm_fc_val, port_cfg.dynamic); + PPE_BM_PORT_FC_SET_REACT_LIMIT(bm_fc_val, port_cfg.in_fly_buf); + PPE_BM_PORT_FC_SET_PRE_ALLOC(bm_fc_val, port_cfg.pre_alloc); + + /* Configure low/high bits of the ceiling for the BM port. */ + val = FIELD_GET(GENMASK(2, 0), port_cfg.ceil); + PPE_BM_PORT_FC_SET_CEILING_LOW(bm_fc_val, val); + val = FIELD_GET(GENMASK(10, 3), port_cfg.ceil); + PPE_BM_PORT_FC_SET_CEILING_HIGH(bm_fc_val, val); + + ret = regmap_bulk_write(ppe_dev->regmap, reg, + bm_fc_val, ARRAY_SIZE(bm_fc_val)); + if (ret) + return ret; + + /* Assign the default group ID 0 to the BM port. */ + val = FIELD_PREP(PPE_BM_PORT_GROUP_ID_SHARED_GROUP_ID, 0); + reg = PPE_BM_PORT_GROUP_ID_ADDR + PPE_BM_PORT_GROUP_ID_INC * bm_port_id; + ret = regmap_update_bits(ppe_dev->regmap, reg, + PPE_BM_PORT_GROUP_ID_SHARED_GROUP_ID, + val); + if (ret) + return ret; + + /* Enable BM port flow control. */ + reg = PPE_BM_PORT_FC_MODE_ADDR + PPE_BM_PORT_FC_MODE_INC * bm_port_id; + + return regmap_set_bits(ppe_dev->regmap, reg, PPE_BM_PORT_FC_MODE_EN); +} + +/* Configure the buffer threshold for the port flow control function. */ +static int ppe_config_bm(struct ppe_device *ppe_dev) +{ + const struct ppe_bm_port_config *port_cfg; + unsigned int i, bm_port_id, port_cfg_cnt; + u32 reg, val; + int ret; + + /* Configure the allocated buffer number only for group 0. + * The buffer number of group 1-3 is already cleared to 0 + * after PPE reset during the probe of PPE driver. + */ + reg = PPE_BM_SHARED_GROUP_CFG_ADDR; + val = FIELD_PREP(PPE_BM_SHARED_GROUP_CFG_SHARED_LIMIT, + ipq9574_ppe_bm_group_config); + ret = regmap_update_bits(ppe_dev->regmap, reg, + PPE_BM_SHARED_GROUP_CFG_SHARED_LIMIT, + val); + if (ret) + goto bm_config_fail; + + /* Configure buffer thresholds for the BM ports. */ + port_cfg = ipq9574_ppe_bm_port_config; + port_cfg_cnt = ARRAY_SIZE(ipq9574_ppe_bm_port_config); + for (i = 0; i < port_cfg_cnt; i++) { + for (bm_port_id = port_cfg[i].port_id_start; + bm_port_id <= port_cfg[i].port_id_end; bm_port_id++) { + ret = ppe_config_bm_threshold(ppe_dev, bm_port_id, + port_cfg[i]); + if (ret) + goto bm_config_fail; + } + } + + return 0; + +bm_config_fail: + dev_err(ppe_dev->dev, "PPE BM config error %d\n", ret); + return ret; +} + +int ppe_hw_config(struct ppe_device *ppe_dev) +{ + return ppe_config_bm(ppe_dev); +} diff --git a/drivers/net/ethernet/qualcomm/ppe/ppe_config.h b/drivers/net/ethernet/qualcomm/ppe/ppe_config.h new file mode 100644 index 000000000000..7b2f6a71cd4c --- /dev/null +++ b/drivers/net/ethernet/qualcomm/ppe/ppe_config.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2025 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef __PPE_CONFIG_H__ +#define __PPE_CONFIG_H__ + +#include "ppe.h" + +int ppe_hw_config(struct ppe_device *ppe_dev); +#endif diff --git a/drivers/net/ethernet/qualcomm/ppe/ppe_regs.h b/drivers/net/ethernet/qualcomm/ppe/ppe_regs.h new file mode 100644 index 000000000000..b00f77ec45fe --- /dev/null +++ b/drivers/net/ethernet/qualcomm/ppe/ppe_regs.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2025 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +/* PPE hardware register and table declarations. */ +#ifndef __PPE_REGS_H__ +#define __PPE_REGS_H__ + +#include + +/* There are 15 BM ports and 4 BM groups supported by PPE. + * BM port (0-7) is for EDMA port 0, BM port (8-13) is for + * PPE physical port 1-6 and BM port 14 is for EIP port. + */ +#define PPE_BM_PORT_FC_MODE_ADDR 0x600100 +#define PPE_BM_PORT_FC_MODE_ENTRIES 15 +#define PPE_BM_PORT_FC_MODE_INC 0x4 +#define PPE_BM_PORT_FC_MODE_EN BIT(0) + +#define PPE_BM_PORT_GROUP_ID_ADDR 0x600180 +#define PPE_BM_PORT_GROUP_ID_ENTRIES 15 +#define PPE_BM_PORT_GROUP_ID_INC 0x4 +#define PPE_BM_PORT_GROUP_ID_SHARED_GROUP_ID GENMASK(1, 0) + +#define PPE_BM_SHARED_GROUP_CFG_ADDR 0x600290 +#define PPE_BM_SHARED_GROUP_CFG_ENTRIES 4 +#define PPE_BM_SHARED_GROUP_CFG_INC 0x4 +#define PPE_BM_SHARED_GROUP_CFG_SHARED_LIMIT GENMASK(10, 0) + +#define PPE_BM_PORT_FC_CFG_TBL_ADDR 0x601000 +#define PPE_BM_PORT_FC_CFG_TBL_ENTRIES 15 +#define PPE_BM_PORT_FC_CFG_TBL_INC 0x10 +#define PPE_BM_PORT_FC_W0_REACT_LIMIT GENMASK(8, 0) +#define PPE_BM_PORT_FC_W0_RESUME_THRESHOLD GENMASK(17, 9) +#define PPE_BM_PORT_FC_W0_RESUME_OFFSET GENMASK(28, 18) +#define PPE_BM_PORT_FC_W0_CEILING_LOW GENMASK(31, 29) +#define PPE_BM_PORT_FC_W1_CEILING_HIGH GENMASK(7, 0) +#define PPE_BM_PORT_FC_W1_WEIGHT GENMASK(10, 8) +#define PPE_BM_PORT_FC_W1_DYNAMIC BIT(11) +#define PPE_BM_PORT_FC_W1_PRE_ALLOC GENMASK(22, 12) + +#define PPE_BM_PORT_FC_SET_REACT_LIMIT(tbl_cfg, value) \ + u32p_replace_bits((u32 *)tbl_cfg, value, PPE_BM_PORT_FC_W0_REACT_LIMIT) +#define PPE_BM_PORT_FC_SET_RESUME_THRESHOLD(tbl_cfg, value) \ + u32p_replace_bits((u32 *)tbl_cfg, value, PPE_BM_PORT_FC_W0_RESUME_THRESHOLD) +#define PPE_BM_PORT_FC_SET_RESUME_OFFSET(tbl_cfg, value) \ + u32p_replace_bits((u32 *)tbl_cfg, value, PPE_BM_PORT_FC_W0_RESUME_OFFSET) +#define PPE_BM_PORT_FC_SET_CEILING_LOW(tbl_cfg, value) \ + u32p_replace_bits((u32 *)tbl_cfg, value, PPE_BM_PORT_FC_W0_CEILING_LOW) +#define PPE_BM_PORT_FC_SET_CEILING_HIGH(tbl_cfg, value) \ + u32p_replace_bits((u32 *)(tbl_cfg) + 0x1, value, PPE_BM_PORT_FC_W1_CEILING_HIGH) +#define PPE_BM_PORT_FC_SET_WEIGHT(tbl_cfg, value) \ + u32p_replace_bits((u32 *)(tbl_cfg) + 0x1, value, PPE_BM_PORT_FC_W1_WEIGHT) +#define PPE_BM_PORT_FC_SET_DYNAMIC(tbl_cfg, value) \ + u32p_replace_bits((u32 *)(tbl_cfg) + 0x1, value, PPE_BM_PORT_FC_W1_DYNAMIC) +#define PPE_BM_PORT_FC_SET_PRE_ALLOC(tbl_cfg, value) \ + u32p_replace_bits((u32 *)(tbl_cfg) + 0x1, value, PPE_BM_PORT_FC_W1_PRE_ALLOC) +#endif