From patchwork Wed Feb 3 22:12:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12065607 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61DB1C433E6 for ; Wed, 3 Feb 2021 22:14:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C45E64F5D for ; Wed, 3 Feb 2021 22:14:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232718AbhBCWN6 (ORCPT ); Wed, 3 Feb 2021 17:13:58 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:53078 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231868AbhBCWN4 (ORCPT ); Wed, 3 Feb 2021 17:13:56 -0500 Received: from mailhost.synopsys.com (mdc-mailhost1.synopsys.com [10.225.0.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 82A85C0114; Wed, 3 Feb 2021 22:12:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1612390375; bh=SnKoXitkWOCapRJGjouiGRqUHkReUAsc8bf6YFLtRiI=; h=From:To:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=AtGGAnJCthwHewZd3M6uAJ93VbmHBOIJKrTHmJedruLWGPXhJCHB/r0c1pJQQ7aJU uWZUEQ1koigwwOpG4vpuZJICfqu3MdP5914ID6VwjmtuRQrN8Z5//Mwn4YaFCdcEt9 EXlKUGApuyjgROgAkwIdLQ44PFrWmCqFPjjOf+E2EgfUf1QIgh3YmtVRd9vLwfVBFs h1mHQRN7XSEhikVfHwcD2QwUWV8ZdKde+KzpchbxL5R0e6TW+KALYXCBkpgk/ndv59 4HL9e9Z9sSjEx9wq78Vob1qG+OnPUL6/9Al/zX0caYTMbIaxrtz6S/OCZVbbem7QnT BzBHlO8m2ClEQ== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 4DF2AA024B; Wed, 3 Feb 2021 22:12:54 +0000 (UTC) X-SNPS-Relay: synopsys.com From: Gustavo Pimentel To: linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Andrew Morton , Greg Kroah-Hartman , Jonathan Corbet , Gustavo Pimentel Subject: [RESEND v4 1/6] misc: Add Synopsys DesignWare xData IP driver Date: Wed, 3 Feb 2021 23:12:46 +0100 Message-Id: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add Synopsys DesignWare xData IP driver. This driver enables/disables the PCI traffic generator module pertain to the Synopsys DesignWare prototype. Signed-off-by: Gustavo Pimentel --- drivers/misc/dw-xdata-pcie.c | 378 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 378 insertions(+) create mode 100644 drivers/misc/dw-xdata-pcie.c diff --git a/drivers/misc/dw-xdata-pcie.c b/drivers/misc/dw-xdata-pcie.c new file mode 100644 index 00000000..3e1bc35 --- /dev/null +++ b/drivers/misc/dw-xdata-pcie.c @@ -0,0 +1,378 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020 Synopsys, Inc. and/or its affiliates. + * Synopsys DesignWare xData driver + * + * Author: Gustavo Pimentel + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DW_XDATA_DRIVER_NAME "dw-xdata-pcie" + +#define DW_XDATA_EP_MEM_OFFSET 0x8000000 + +struct dw_xdata_pcie_data { + /* xData registers location */ + enum pci_barno rg_bar; + off_t rg_off; + size_t rg_sz; +}; + +static const struct dw_xdata_pcie_data snps_edda_data = { + /* xData registers location */ + .rg_bar = BAR_0, + .rg_off = 0x00000000, /* 0 Kbytes */ + .rg_sz = 0x0000012c, /* 300 bytes */ +}; + +#define STATUS_DONE BIT(0) + +#define CONTROL_DOORBELL BIT(0) +#define CONTROL_IS_WRITE BIT(1) +#define CONTROL_LENGTH(a) FIELD_PREP(GENMASK(13, 2), a) +#define CONTROL_PATTERN_INC BIT(16) +#define CONTROL_NO_ADDR_INC BIT(18) + +#define XPERF_CONTROL_ENABLE BIT(5) + +struct dw_xdata_regs { + u32 addr_lsb; /* 0x000 */ + u32 addr_msb; /* 0x004 */ + u32 burst_cnt; /* 0x008 */ + u32 control; /* 0x00c */ + u32 pattern; /* 0x010 */ + u32 status; /* 0x014 */ + u32 RAM_addr; /* 0x018 */ + u32 RAM_port; /* 0x01c */ + u32 _reserved0[14]; /* 0x020..0x054 */ + u32 perf_control; /* 0x058 */ + u32 _reserved1[41]; /* 0x05c..0x0fc */ + u32 wr_cnt_lsb; /* 0x100 */ + u32 wr_cnt_msb; /* 0x104 */ + u32 rd_cnt_lsb; /* 0x108 */ + u32 rd_cnt_msb; /* 0x10c */ +} __packed; + +struct dw_xdata_region { + phys_addr_t paddr; /* physical address */ + void __iomem *vaddr; /* virtual address */ + size_t sz; /* size */ +}; + +struct dw_xdata { + struct dw_xdata_region rg_region; /* registers */ + size_t max_wr_len; /* max wr xfer len */ + size_t max_rd_len; /* max rd xfer len */ + struct mutex mutex; + struct pci_dev *pdev; +}; + +static inline struct dw_xdata_regs __iomem *__dw_regs(struct dw_xdata *dw) +{ + return dw->rg_region.vaddr; +} + +static void dw_xdata_stop(struct dw_xdata *dw) +{ + u32 burst = readl(&(__dw_regs(dw)->burst_cnt)); + + if (burst & BIT(31)) { + burst &= ~(u32)BIT(31); + writel(burst, &(__dw_regs(dw)->burst_cnt)); + } +} + +static void dw_xdata_start(struct dw_xdata *dw, bool write) +{ + u32 control, status; + + /* Stop first if xfer in progress */ + dw_xdata_stop(dw); + + /* Clear status register */ + writel(0x0, &(__dw_regs(dw)->status)); + + /* Burst count register set for continuous until stopped */ + writel(0x80001001, &(__dw_regs(dw)->burst_cnt)); + + /* Pattern register */ + writel(0x0, &(__dw_regs(dw)->pattern)); + + /* Control register */ + control = CONTROL_DOORBELL | CONTROL_PATTERN_INC | CONTROL_NO_ADDR_INC; + if (write) { + control |= CONTROL_IS_WRITE; + control |= CONTROL_LENGTH(dw->max_wr_len); + } else { + control |= CONTROL_LENGTH(dw->max_rd_len); + } + writel(control, &(__dw_regs(dw)->control)); + + usleep_range(100, 150); + + status = readl(&(__dw_regs(dw)->status)); + if (!(status & STATUS_DONE)) + pci_dbg(dw->pdev, "xData: started %s direction\n", + write ? "write" : "read"); +} + +static void dw_xdata_perf_meas(struct dw_xdata *dw, u64 *data, bool write) +{ + if (write) { + *data = readl(&(__dw_regs(dw)->wr_cnt_msb)); + *data <<= 32; + *data |= readl(&(__dw_regs(dw)->wr_cnt_lsb)); + } else { + *data = readl(&(__dw_regs(dw)->rd_cnt_msb)); + *data <<= 32; + *data |= readl(&(__dw_regs(dw)->rd_cnt_lsb)); + } +} + +static u64 dw_xdata_perf_diff(u64 *m1, u64 *m2, u64 time) +{ + u64 rate = (*m1 - *m2); + + rate *= (1000 * 1000 * 1000); + rate >>= 20; + rate = DIV_ROUND_CLOSEST_ULL(rate, time); + + return rate; +} + +static void dw_xdata_perf(struct dw_xdata *dw, u64 *rate, bool write) +{ + u64 data[2], time[2], diff; + + /* First measurement */ + writel(0x0, &(__dw_regs(dw)->perf_control)); + dw_xdata_perf_meas(dw, &data[0], write); + time[0] = jiffies; + writel((u32)XPERF_CONTROL_ENABLE, &(__dw_regs(dw)->perf_control)); + + /* Delay 100ms */ + mdelay(100); + + /* Second measurement */ + writel(0x0, &(__dw_regs(dw)->perf_control)); + dw_xdata_perf_meas(dw, &data[1], write); + time[1] = jiffies; + writel((u32)XPERF_CONTROL_ENABLE, &(__dw_regs(dw)->perf_control)); + + /* Calculations */ + diff = jiffies_to_nsecs(time[1] - time[0]); + *rate = dw_xdata_perf_diff(&data[1], &data[0], diff); + + pci_dbg(dw->pdev, "xData: time=%llu us, %s=%llu MB/s\n", + diff, write ? "write" : "read", *rate); +} + +static ssize_t write_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct dw_xdata *dw = pci_get_drvdata(pdev); + u64 rate; + + mutex_lock(&dw->mutex); + dw_xdata_perf(dw, &rate, true); + mutex_unlock(&dw->mutex); + + return sysfs_emit(buf, "%llu MB/s\n", rate); +} + +static ssize_t write_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct dw_xdata *dw = pci_get_drvdata(pdev); + + pci_dbg(pdev, "xData: requested write transfer\n"); + + mutex_lock(&dw->mutex); + dw_xdata_start(dw, true); + mutex_unlock(&dw->mutex); + + return size; +} + +static DEVICE_ATTR_RW(write); + +static ssize_t read_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct dw_xdata *dw = pci_get_drvdata(pdev); + u64 rate; + + mutex_lock(&dw->mutex); + dw_xdata_perf(dw, &rate, false); + mutex_unlock(&dw->mutex); + + return sysfs_emit(buf, "%llu MB/s\n", rate); +} + +static ssize_t read_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct dw_xdata *dw = pci_get_drvdata(pdev); + + pci_dbg(pdev, "xData: requested read transfer\n"); + + mutex_lock(&dw->mutex); + dw_xdata_start(dw, false); + mutex_unlock(&dw->mutex); + + return size; +} + +static DEVICE_ATTR_RW(read); + +static ssize_t stop_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct dw_xdata *dw = pci_get_drvdata(pdev); + + pci_dbg(pdev, "xData: requested stop any transfer\n"); + + mutex_lock(&dw->mutex); + dw_xdata_stop(dw); + mutex_unlock(&dw->mutex); + + return size; +} + +static DEVICE_ATTR_WO(stop); + +static struct attribute *default_attrs[] = { + &dev_attr_write.attr, + &dev_attr_read.attr, + &dev_attr_stop.attr, + NULL, +}; + +static const struct attribute_group xdata_attr_group = { + .attrs = default_attrs, + .name = DW_XDATA_DRIVER_NAME, +}; + +static int dw_xdata_pcie_probe(struct pci_dev *pdev, + const struct pci_device_id *pid) +{ + const struct dw_xdata_pcie_data *pdata = (void *)pid->driver_data; + struct dw_xdata *dw; + u64 addr; + int err; + + /* Enable PCI device */ + err = pcim_enable_device(pdev); + if (err) { + pci_err(pdev, "enabling device failed\n"); + return err; + } + + /* Mapping PCI BAR regions */ + err = pcim_iomap_regions(pdev, BIT(pdata->rg_bar), pci_name(pdev)); + if (err) { + pci_err(pdev, "xData BAR I/O remapping failed\n"); + return err; + } + + pci_set_master(pdev); + + /* Allocate memory */ + dw = devm_kzalloc(&pdev->dev, sizeof(*dw), GFP_KERNEL); + if (!dw) + return -ENOMEM; + + /* Data structure initialization */ + mutex_init(&dw->mutex); + + dw->rg_region.vaddr = pcim_iomap_table(pdev)[pdata->rg_bar]; + if (!dw->rg_region.vaddr) + return -ENOMEM; + + dw->rg_region.vaddr += pdata->rg_off; + dw->rg_region.paddr = pdev->resource[pdata->rg_bar].start; + dw->rg_region.paddr += pdata->rg_off; + dw->rg_region.sz = pdata->rg_sz; + + dw->max_wr_len = pcie_get_mps(pdev); + dw->max_wr_len >>= 2; + + dw->max_rd_len = pcie_get_readrq(pdev); + dw->max_rd_len >>= 2; + + dw->pdev = pdev; + + writel(0x0, &(__dw_regs(dw)->RAM_addr)); + writel(0x0, &(__dw_regs(dw)->RAM_port)); + + addr = dw->rg_region.paddr + DW_XDATA_EP_MEM_OFFSET; + writel(lower_32_bits(addr), &(__dw_regs(dw)->addr_lsb)); + writel(upper_32_bits(addr), &(__dw_regs(dw)->addr_msb)); + pci_dbg(pdev, "xData: target address = 0x%.16llx\n", addr); + + pci_dbg(pdev, "xData: wr_len=%zu, rd_len=%zu\n", + dw->max_wr_len * 4, dw->max_rd_len * 4); + + /* Saving data structure reference */ + pci_set_drvdata(pdev, dw); + + /* Sysfs */ + err = sysfs_create_group(&pdev->dev.kobj, &xdata_attr_group); + if (err) + return err; + + err = sysfs_create_link(kernel_kobj, &pdev->dev.kobj, + DW_XDATA_DRIVER_NAME); + if (err) + return err; + + return 0; +} + +static void dw_xdata_pcie_remove(struct pci_dev *pdev) +{ + struct dw_xdata *dw = pci_get_drvdata(pdev); + + if (dw) { + mutex_lock(&dw->mutex); + dw_xdata_stop(dw); + mutex_unlock(&dw->mutex); + } + + sysfs_remove_link(kernel_kobj, DW_XDATA_DRIVER_NAME); + sysfs_remove_group(&pdev->dev.kobj, &xdata_attr_group); +} + +static const struct pci_device_id dw_xdata_pcie_id_table[] = { + { PCI_DEVICE_DATA(SYNOPSYS, EDDA, &snps_edda_data) }, + { } +}; +MODULE_DEVICE_TABLE(pci, dw_xdata_pcie_id_table); + +static struct pci_driver dw_xdata_pcie_driver = { + .name = DW_XDATA_DRIVER_NAME, + .id_table = dw_xdata_pcie_id_table, + .probe = dw_xdata_pcie_probe, + .remove = dw_xdata_pcie_remove, +}; + +module_pci_driver(dw_xdata_pcie_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Synopsys DesignWare xData PCIe driver"); +MODULE_AUTHOR("Gustavo Pimentel "); + From patchwork Wed Feb 3 22:12:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12065611 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D329C433E0 for ; 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b=EjI0JqH+P66rNI7cZN+JO1EBPEOFzIG4DW/r75l5QlqIUXXytfl6VoiKaO5VZBnbu D21CgD6o2iKs+Pz2CL9OsfvQ8GuTlfxnkjGeuZaIeWnHTh+QA54F/CG77UeJ/YepM8 w1K1tL/1MDxAoE8JG6TyM+BEFVZsN7J2Z28OZazAFkZ/OEOYQ4o2BwwJwyaWJ+PSD/ 63LOszWo6vFxmVo/A2PRRzpFVxdV6cXPiIiG7v/amcG6w9athYUPYqusKCwcNTvJrE yEPByU4y/HONtRWA7vaPCkSjN23ZJxmpLltG5OkqOQxuCpkD79pVfCTYRbYVD5wnQQ 5b79MTMtGJIIA== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id CA38DA024D; Wed, 3 Feb 2021 22:12:54 +0000 (UTC) X-SNPS-Relay: synopsys.com From: Gustavo Pimentel To: linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Andrew Morton , Greg Kroah-Hartman , Jonathan Corbet Cc: Gustavo Pimentel Subject: [RESEND v4 2/6] misc: Add Synopsys DesignWare xData IP driver to Makefile Date: Wed, 3 Feb 2021 23:12:47 +0100 Message-Id: <1a1b9d4893fe4ef1ff906a5813a0b18895da90ed.1612390291.git.gustavo.pimentel@synopsys.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add Synopsys DesignWare xData IP driver to Makefile. This driver enables/disables the PCIe traffic generator module pertain to the Synopsys DesignWare prototype. Signed-off-by: Gustavo Pimentel --- drivers/misc/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index d23231e..bf22021 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -49,6 +49,7 @@ obj-$(CONFIG_SRAM_EXEC) += sram-exec.o obj-$(CONFIG_GENWQE) += genwqe/ obj-$(CONFIG_ECHO) += echo/ obj-$(CONFIG_CXL_BASE) += cxl/ +obj-$(CONFIG_DW_XDATA_PCIE) += dw-xdata-pcie.o obj-$(CONFIG_PCI_ENDPOINT_TEST) += pci_endpoint_test.o obj-$(CONFIG_OCXL) += ocxl/ obj-y += cardreader/ From patchwork Wed Feb 3 22:12:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12065609 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0875BC433DB for ; Wed, 3 Feb 2021 22:14:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ACA8964DF0 for ; Wed, 3 Feb 2021 22:14:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233171AbhBCWOg (ORCPT ); Wed, 3 Feb 2021 17:14:36 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:32808 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232446AbhBCWN5 (ORCPT ); Wed, 3 Feb 2021 17:13:57 -0500 Received: from mailhost.synopsys.com (mdc-mailhost1.synopsys.com [10.225.0.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 9BFF140489; Wed, 3 Feb 2021 22:12:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1612390376; bh=wTDtZw8zXSiDJYCQgfDlx/77INQB9/ASV35kYlcbdFY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=DQm8TqRARbtNcGLNuZRyImIEKpLDuy3vAFBngfUYyYGg0I5h+YO443M/lO1XY5Rzt 5G0O4ciZHio3qfkzL9WOXP5sBGTT2MjH/KrBQhcvsDZXaszANDMapQiyx2ZPPMZ/HT MrGRJBKDhhNIbMJIRuAoMobABuTY+0VKTNqlsu5Lqzf6n2UUOGGji8U79yRpzsdq3x TXWaT/nMA+avN0+7IJb1rD0dkMN6M69o0y8Xaoim7JCDdL3cKiTj0GiKLxL9NYJOKX eL+LyvnSY5c/l6YNsD/m5IImQ3zUj4xWzEXFgwKcB0GyPKqbhMDOHCvyh5SVrGKnHy Ary5DLkZSC9Kg== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 5D11BA0249; Wed, 3 Feb 2021 22:12:55 +0000 (UTC) X-SNPS-Relay: synopsys.com From: Gustavo Pimentel To: linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Andrew Morton , Greg Kroah-Hartman , Jonathan Corbet Cc: Gustavo Pimentel Subject: [RESEND v4 3/6] misc: Add Synopsys DesignWare xData IP driver to Kconfig Date: Wed, 3 Feb 2021 23:12:48 +0100 Message-Id: <81f95c6ff0faaf8cbb56430320abb76af772a339.1612390291.git.gustavo.pimentel@synopsys.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add Synopsys DesignWare xData IP driver to Kconfig. This driver enables/disables the PCIe traffic generator module pertain to the Synopsys DesignWare prototype. Signed-off-by: Gustavo Pimentel --- drivers/misc/Kconfig | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index fafa8b0..6d5783f 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -423,6 +423,17 @@ config SRAM config SRAM_EXEC bool +config DW_XDATA_PCIE + depends on PCI + tristate "Synopsys DesignWare xData PCIe driver" + default n + help + This driver allows controlling Synopsys DesignWare PCIe traffic + generator IP also known as xData, present in Synopsys Designware + PCIe Endpoint prototype. + + If unsure, say N. + config PCI_ENDPOINT_TEST depends on PCI select CRC32 From patchwork Wed Feb 3 22:12:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12065605 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 194C7C4332B for ; Wed, 3 Feb 2021 22:14:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB46664DE7 for ; Wed, 3 Feb 2021 22:14:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232910AbhBCWOA (ORCPT ); Wed, 3 Feb 2021 17:14:00 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:53092 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232462AbhBCWN6 (ORCPT ); Wed, 3 Feb 2021 17:13:58 -0500 Received: from mailhost.synopsys.com (mdc-mailhost1.synopsys.com [10.225.0.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 4D5E7C0117; Wed, 3 Feb 2021 22:12:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1612390377; bh=xjFl0ry1f4kLV7eWV2SxeXcHKekFmdWi7FGEn+fooAU=; h=From:To:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=SIwXnq5/2CBgH+y1FpPEN0slnm3mV9v12QurVd1lrqJThBkgfZUjC1E8XyuhF0JAd 13UbjwCEL1StEjf2+qKi52UjQIErY9PIySjwyUIubg1qX1HTmgFWxj7YTErL94rO61 M3qUZA5IkFg2CLCGFYLiyp5OZTdHfPFBQuNR1bQ/s1naLWPPlQTNw6XcnaYYUgnrds nGs86CukOR9I9NR8zahahZiW8psrLyDHj+AArxI2nzx1r6SXCLRq7D4EuTVArh1rO5 cdc3dbDnRqZOpYJMU48GBwySjcAsfm2iDauMAUGs81JrdGD/EmAW19Qu1oWxlzyHuq xZmlrqTacXHEA== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 1E430A024B; Wed, 3 Feb 2021 22:12:56 +0000 (UTC) X-SNPS-Relay: synopsys.com From: Gustavo Pimentel To: linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Andrew Morton , Greg Kroah-Hartman , Jonathan Corbet , Gustavo Pimentel Subject: [RESEND v4 4/6] Documentation: misc-devices: Add Documentation for dw-xdata-pcie driver Date: Wed, 3 Feb 2021 23:12:49 +0100 Message-Id: <2cc3a3a324d299a096f1d3e682b2039d3537b013.1612390291.git.gustavo.pimentel@synopsys.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add Documentation for dw-xdata-pcie driver. Signed-off-by: Gustavo Pimentel --- Documentation/misc-devices/dw-xdata-pcie.rst | 40 ++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 Documentation/misc-devices/dw-xdata-pcie.rst diff --git a/Documentation/misc-devices/dw-xdata-pcie.rst b/Documentation/misc-devices/dw-xdata-pcie.rst new file mode 100644 index 00000000..3af9fad --- /dev/null +++ b/Documentation/misc-devices/dw-xdata-pcie.rst @@ -0,0 +1,40 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=========================================================================== +Driver for Synopsys DesignWare PCIe traffic generator (also known as xData) +=========================================================================== + +This driver should be used as a host-side (Root Complex) driver and Synopsys +DesignWare prototype that includes this IP. + +The "dw-xdata-pcie" driver can be used to enable/disable PCIe traffic +generator in either direction (mutual exclusion) besides allowing the +PCIe link performance analysis. + +The interaction with this driver is done through the module parameter and +can be changed in runtime. The driver outputs the requested command state +information to /var/log/kern.log or dmesg. + +Request write TLPs traffic generation - Root Complex to Endpoint direction +- Command: + echo 1 > /sys/kernel/dw-xdata-pcie/write + +Get write TLPs traffic link throughput +- Command: + cat /sys/kernel/dw-xdata-pcie/write +- Output example: + 204 MB/s + +Request read TLPs traffic generation - Endpoint to Root Complex direction: +- Command: + echo 1 > /sys/kernel/dw-xdata-pcie/read + +Get read TLPs traffic link throughput +- Command: + cat /sys/kernel/dw-xdata-pcie/read +- Output example: + 199 MB/s + +Request to stop any current TLP transfer: +- Command: + echo 1 > /sys/kernel/dw-xdata-pcie/stop From patchwork Wed Feb 3 22:12:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12065599 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8FD0FC433DB for ; Wed, 3 Feb 2021 22:14:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5021064DF0 for ; Wed, 3 Feb 2021 22:14:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232793AbhBCWN7 (ORCPT ); Wed, 3 Feb 2021 17:13:59 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:32834 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232693AbhBCWN6 (ORCPT ); Wed, 3 Feb 2021 17:13:58 -0500 Received: from mailhost.synopsys.com (mdc-mailhost1.synopsys.com [10.225.0.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id D55714048E; Wed, 3 Feb 2021 22:12:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1612390378; bh=x6qwlQ3unob1xa78MC32IMOFOlfkiuMvvCbd1vCCzC8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=Xe9rt32y8QdKsGjyzxrolSHXrZUey63GCbtQTXNSThQ4DLYOPa8mE8pnIzDDjLcQB 8m8HgniwAtsCyNZZ3DVEpguXpaoxPV5i/fLafJnyqCW1wk5mtDLyKYjXFPh+9zBPBr EhK6qbDL5JFzBOB0KPVJhS8fdSx9bIjpqCWq+pUAaZEhAF3R8wyNQK/kxshzfYbaPY 9KSjz5FwMao17T+UgfgDfRdHkrFqjAMZbA1nWg6vCcavPvtEp+KldMAoISLOvqLoOK H5h6myMhoZN9RRACzml2t3bJtsAbccIEIlhFGdJ3yB8tfo9FoDghawhA22QumIIcGf SO5qmu48icgiw== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 9E137A024E; Wed, 3 Feb 2021 22:12:56 +0000 (UTC) X-SNPS-Relay: synopsys.com From: Gustavo Pimentel To: linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Andrew Morton , Greg Kroah-Hartman , Jonathan Corbet Cc: Gustavo Pimentel Subject: [RESEND v4 5/6] MAINTAINERS: Add Synopsys xData IP driver maintainer Date: Wed, 3 Feb 2021 23:12:50 +0100 Message-Id: <52f2cbdae433e73d0c07d93d30cfd45ad520c60f.1612390291.git.gustavo.pimentel@synopsys.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add Synopsys xData IP driver maintainer. This driver aims to support Synopsys xData IP and is normally distributed along with Synopsys PCIe EndPoint IP as a PCIe traffic generator (depends of the use and licensing agreement). Signed-off-by: Gustavo Pimentel --- MAINTAINERS | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 546aa66..f9d681b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5061,6 +5061,13 @@ S: Maintained F: drivers/dma/dw-edma/ F: include/linux/dma/edma.h +DESIGNWARE XDATA IP DRIVER +M: Gustavo Pimentel +L: linux-pci@vger.kernel.org +S: Maintained +F: Documentation/misc-devices/dw-xdata-pcie.rst +F: drivers/misc/dw-xdata-pcie.c + DESIGNWARE USB2 DRD IP DRIVER M: Minas Harutyunyan L: linux-usb@vger.kernel.org From patchwork Wed Feb 3 22:12:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12065603 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A545DC433E6 for ; Wed, 3 Feb 2021 22:14:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 724A764F4E for ; Wed, 3 Feb 2021 22:14:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232968AbhBCWOB (ORCPT ); Wed, 3 Feb 2021 17:14:01 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:32840 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232720AbhBCWN7 (ORCPT ); Wed, 3 Feb 2021 17:13:59 -0500 Received: from mailhost.synopsys.com (mdc-mailhost1.synopsys.com [10.225.0.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 8ABCC40490; Wed, 3 Feb 2021 22:12:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1612390378; bh=im9YPeIOIOX6v4VKPr6LIGB+a/nLiNTjVu6zUPMNTcw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=k1qhr8y91jhHcGN/0CdZzJalsL7UXUwn0Q3e8sEcKFtuwGIJJknsJzq82yosvACGf Jk/h3Ky7V6mkt1ikgqfN57cATia4ntjnvIDhSWPlRTMFxJgTqesQqZSlblXWyTnpew ci8oIcAUiU9XnR4ROXaTCFnnbE5pmIFHJCB+YN+Hxx4aKTihA0yEvUHkxGXZ0gH3cP trjUwfFmowPNbJnTQXtpPBHrnisL/Cx+WeuvdaNB5imlP4qLNNa14Tpkm2AcypeYsq Qv8dnrubInhMDcsuNMtkJYHTEfIXBxyHVv1CwdxlPVT9OlQSad3Otpo/3XuHkSRnHO VggzKd1kkX8Kw== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 5E12EA0249; Wed, 3 Feb 2021 22:12:57 +0000 (UTC) X-SNPS-Relay: synopsys.com From: Gustavo Pimentel To: linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Andrew Morton , Greg Kroah-Hartman , Jonathan Corbet Cc: Gustavo Pimentel Subject: [RESEND v4 6/6] docs: ABI: Add sysfs documentation interface of dw-xdata-pcie driver Date: Wed, 3 Feb 2021 23:12:51 +0100 Message-Id: <45f0701b523cda52b4b7f42351b63d5a0b6040b6.1612390291.git.gustavo.pimentel@synopsys.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This patch describes the sysfs interface implemented on the dw-xdata-pcie driver. Signed-off-by: Gustavo Pimentel --- Documentation/ABI/testing/sysfs-driver-xdata | 46 ++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-driver-xdata diff --git a/Documentation/ABI/testing/sysfs-driver-xdata b/Documentation/ABI/testing/sysfs-driver-xdata new file mode 100644 index 00000000..a7bb44b --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-xdata @@ -0,0 +1,46 @@ +What: /sys/kernel/dw-xdata-pcie/write +Date: February 2021 +KernelVersion: 5.12 +Contact: Gustavo Pimentel +Description: Allows the user to enable the PCIe traffic generator which + will create write TLPs frames - from the Root Complex to the + Endpoint direction. + Usage e.g. + echo 1 > /sys/kernel/dw-xdata-pcie/write + + The user can read the current PCIe link throughput generated + through this generator. + Usage e.g. + cat /sys/kernel/dw-xdata-pcie/write + 204 MB/s + + The file is read and write. + +What: /sys/kernel/dw-xdata-pcie/read +Date: February 2021 +KernelVersion: 5.12 +Contact: Gustavo Pimentel +Description: Allows the user to enable the PCIe traffic generator which + will create read TLPs frames - from the Endpoint to the Root + Complex direction. + Usage e.g. + echo 1 > /sys/kernel/dw-xdata-pcie/read + + The user can read the current PCIe link throughput generated + through this generator. + Usage e.g. + cat /sys/kernel/dw-xdata-pcie/read + 199 MB/s + + The file is read and write. + +What: /sys/kernel/dw-xdata-pcie/stop +Date: February 2021 +KernelVersion: 5.12 +Contact: Gustavo Pimentel +Description: Allows the user to disable the PCIe traffic generator in all + directions. + Usage e.g. + echo 1 > /sys/kernel/dw-xdata-pcie/stop + + The file is write only.