From patchwork Fri Feb 12 17:28:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 1439968 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=synopsys.com header.i=@synopsys.com header.a=rsa-sha256 header.s=mail header.b=c97ih4BA; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DcgV515qBz9rx8 for ; Sat, 13 Feb 2021 04:29:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229889AbhBLR3R (ORCPT ); Fri, 12 Feb 2021 12:29:17 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:42458 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229558AbhBLR3O (ORCPT ); Fri, 12 Feb 2021 12:29:14 -0500 Received: from mailhost.synopsys.com (mdc-mailhost2.synopsys.com [10.225.0.210]) (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 0010540C6A; Fri, 12 Feb 2021 17:28:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1613150894; bh=YAzvQBcZ2FkmDvQFuEb+w2DRCKmV9Y9knpRXoJDhJHs=; h=From:To:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=c97ih4BAhi8eATO86rGBOKoACDQ70xkgh9eb5fTqRYOiWiqXuPRaAthWy//moReRF xv0zw+kNAqnEaxMGT1NqowrnLxKiY7GfvXuGAl2d5BCHu6vLbqhO/rmZw3/0pSQEdG fx7i6Mp1cJh6m6AsGRdbQ2osF2Wos+ZMDpBOLifrMsnDwBTPMDzIuIQy8N0sgYtkd+ GzORvN1of+5BUHyU3ACKfz/pci0/Z4+A8XAiFZStH0nmPfH9MFDN/bkVKrHYtfkBUz qONPyhOTMvDNrzp+hdluW/BGzRd8gSES52EaqTCXQDKukrG+AZxTqTJiB4E6UPFs9W hPdnNA+wxc/BA== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id B96BEA0063; Fri, 12 Feb 2021 17:28:12 +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 , Bjorn Helgaas , Gustavo Pimentel Subject: [PATCH v6 1/5] misc: Add Synopsys DesignWare xData IP driver Date: Fri, 12 Feb 2021 18:28:03 +0100 Message-Id: <724f5d30e3a9b86448df7e32fb5ed1e814416368.1613150798.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. 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 | 390 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 390 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..62c6fa9 --- /dev/null +++ b/drivers/misc/dw-xdata-pcie.c @@ -0,0 +1,390 @@ +// 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) + +#define BURST_REPEAT BIT(31) +#define BURST_VALUE 0x1001 + +#define PATTERN_VALUE 0x0 + +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; + + mutex_lock(&dw->mutex); + + burst = readl(&(__dw_regs(dw)->burst_cnt)); + + if (burst & BURST_REPEAT) { + burst &= ~(u32)BURST_REPEAT; + writel(burst, &(__dw_regs(dw)->burst_cnt)); + } + + mutex_unlock(&dw->mutex); +} + +static void dw_xdata_start(struct dw_xdata *dw, bool write) +{ + u32 control, status; + + /* Stop first if xfer in progress */ + dw_xdata_stop(dw); + + mutex_lock(&dw->mutex); + + /* Clear status register */ + writel(0x0, &(__dw_regs(dw)->status)); + + /* Burst count register set for continuous until stopped */ + writel(BURST_REPEAT | BURST_VALUE, &(__dw_regs(dw)->burst_cnt)); + + /* Pattern register */ + writel(PATTERN_VALUE, &(__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)); + + /* + * The xData HW block needs about 100 ms to initiate the traffic + * generation according this HW block datasheet. + */ + usleep_range(100, 150); + + status = readl(&(__dw_regs(dw)->status)); + + mutex_unlock(&dw->mutex); + + 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; + + mutex_lock(&dw->mutex); + + /* First acquisition of current count frames */ + 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)); + + /* + * Wait 100ms between the 1st count frame acquisition and the 2nd + * count frame acquisition, in order to calculate the speed later + */ + mdelay(100); + + /* Second acquisition of current count frames */ + 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)); + + /* + * Speed calculation + * + * rate = (2nd count frames - 1st count frames) / (time elapsed) + */ + diff = jiffies_to_nsecs(time[1] - time[0]); + *rate = dw_xdata_perf_diff(&data[1], &data[0], diff); + + mutex_unlock(&dw->mutex); + + 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; + + dw_xdata_perf(dw, &rate, true); + + return sysfs_emit(buf, "%llu\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"); + + dw_xdata_start(dw, true); + + 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; + + dw_xdata_perf(dw, &rate, false); + + return sysfs_emit(buf, "%llu\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"); + + dw_xdata_start(dw, false); + + 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"); + + dw_xdata_stop(dw); + + 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 -ENODEV; + + return 0; +} + +static void dw_xdata_pcie_remove(struct pci_dev *pdev) +{ + struct dw_xdata *dw = pci_get_drvdata(pdev); + + if (dw) + dw_xdata_stop(dw); + + 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 Fri Feb 12 17:28:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 1439971 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=synopsys.com header.i=@synopsys.com header.a=rsa-sha256 header.s=mail header.b=OBcbOPzV; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DcgV6217Dz9rx8 for ; Sat, 13 Feb 2021 04:29:34 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231404AbhBLR3W (ORCPT ); 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Fri, 12 Feb 2021 17:28:13 +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 , Bjorn Helgaas Cc: Gustavo Pimentel Subject: [PATCH v6 2/5] misc: Add Synopsys DesignWare xData IP driver to Makefile and Kconfig Date: Fri, 12 Feb 2021 18:28:04 +0100 Message-Id: <2683d06074193f2f56bdb519ceed20cb54c00056.1613150798.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 and Kconfig. This driver enables/disables the PCIe traffic generator module pertain to the Synopsys DesignWare prototype. Signed-off-by: Gustavo Pimentel --- drivers/misc/Kconfig | 10 ++++++++++ drivers/misc/Makefile | 1 + 2 files changed, 11 insertions(+) diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index fafa8b0..e42b171 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -423,6 +423,16 @@ config SRAM config SRAM_EXEC bool +config DW_XDATA_PCIE + depends on PCI + tristate "Synopsys DesignWare xData PCIe driver" + 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 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 Fri Feb 12 17:28:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 1439969 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=synopsys.com header.i=@synopsys.com header.a=rsa-sha256 header.s=mail header.b=OY0Fo/L8; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DcgV53sSgz9sSC for ; Sat, 13 Feb 2021 04:29:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231341AbhBLR3T (ORCPT ); Fri, 12 Feb 2021 12:29:19 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:42474 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230405AbhBLR3Q (ORCPT ); Fri, 12 Feb 2021 12:29:16 -0500 Received: from mailhost.synopsys.com (mdc-mailhost2.synopsys.com [10.225.0.210]) (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 0737C40C6B; Fri, 12 Feb 2021 17:28:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1613150896; bh=cWk/9t1KJ3pkWZTaXhcE9sqS1Abl0NkmKoOW7uAzFRQ=; h=From:To:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=OY0Fo/L8uWdChJDGzWbKVuADzYlOeYZjYjnDV4JkjB6rgXmmB3/3bghuYhTrlWpmu 15h2c9NXBERGUjt5Ph525s9+gyBPKIz2SeK/xco48LAx2m559y4fbZT8KlaAeAEqHf lVWaCFeil0E3ZuiI1pjhTgjLA/edfhRTeJt6hme8sSd4DJF7enxN6AbEo6dk2laDEy YBrPQi5QG+YWocfha3ddXByrLolrJhTjoPBBt8qv4fBrgNBXTOwLoJnzhRr6Fr1V7T kkHiEv02aFXE6BHeJ5zv67g0o0T3xOssIsA83qwl8oqHrCOMQBsmZ7jDs+1zE3Orw+ qOo0iEpyCMGtQ== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id C4688A005D; Fri, 12 Feb 2021 17:28:14 +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 , Bjorn Helgaas , Gustavo Pimentel Subject: [PATCH v6 3/5] Documentation: misc-devices: Add Documentation for dw-xdata-pcie driver Date: Fri, 12 Feb 2021 18:28:05 +0100 Message-Id: <3ac165649570ce353e644f2b4c3f7473d72c7e23.1613150798.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..3d241ae --- /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/bus/pci/drivers/dw-xdata-pcie/.../write + +Get write TLPs traffic link throughput in MB/s +- Command: + cat /sys/bus/pci/drivers/dw-xdata-pcie/.../write +- Output example: + 204 + +Request read TLPs traffic generation - Endpoint to Root Complex direction: +- Command: + echo 1 > /sys/bus/pci/drivers/dw-xdata-pcie/.../read + +Get read TLPs traffic link throughput in MB/s +- Command: + cat /sys/bus/pci/drivers/dw-xdata-pcie/.../read +- Output example: + 199 + +Request to stop any current TLP transfer: +- Command: + echo 1 > /sys/bus/pci/drivers/dw-xdata-pcie/.../stop From patchwork Fri Feb 12 17:28:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 1439970 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=synopsys.com header.i=@synopsys.com header.a=rsa-sha256 header.s=mail header.b=ZWnuMBns; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DcgV56VG5z9sBy for ; Sat, 13 Feb 2021 04:29:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231359AbhBLR3V (ORCPT ); Fri, 12 Feb 2021 12:29:21 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:42750 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230489AbhBLR3R (ORCPT ); Fri, 12 Feb 2021 12:29:17 -0500 Received: from mailhost.synopsys.com (mdc-mailhost2.synopsys.com [10.225.0.210]) (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 E2A37C0447; Fri, 12 Feb 2021 17:28:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1613150897; bh=x6qwlQ3unob1xa78MC32IMOFOlfkiuMvvCbd1vCCzC8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=ZWnuMBnspqhPjf20f+p1rWTKlCcJkSAZwoa0TR0Lsq6AjuMdbAWaFmXulFTzcAXvE f3jRH+nPP0MzXRQg21LkXxA8LFl4+bJOkUiPPZwWxA8FMVuAt+dUkPMBDa4yqwPM9q fAJg4HhgWBUHcgxwboYOgacG0oCp6JQuBNtgOALT9GwQb9eZWkprQ4/ADSfhM3DdSN s+OxC6q90XehSNIVKdfxWr/FNubsFZdRfYpcyrzKe5tKlpb3bvFr0BbA0IeaQDwcsl a6xGhfts9tsjJRtn+oT4kY36bJsBiadtiNPBoxY9bTtH4o+/Y9Lu5WE/t+9wi6KOFO G60P8f0r21FSA== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id A92AEA0061; Fri, 12 Feb 2021 17:28:15 +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 , Bjorn Helgaas Cc: Gustavo Pimentel Subject: [PATCH v6 4/5] MAINTAINERS: Add Synopsys xData IP driver maintainer Date: Fri, 12 Feb 2021 18:28:06 +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 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 Fri Feb 12 17:28:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 1439972 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=synopsys.com header.i=@synopsys.com header.a=rsa-sha256 header.s=mail header.b=OdL7A8jo; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DcgV64gn9z9sBy for ; Sat, 13 Feb 2021 04:29:34 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231473AbhBLR3Z (ORCPT ); Fri, 12 Feb 2021 12:29:25 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:42770 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231131AbhBLR3S (ORCPT ); Fri, 12 Feb 2021 12:29:18 -0500 Received: from mailhost.synopsys.com (mdc-mailhost2.synopsys.com [10.225.0.210]) (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 1631BC0448; Fri, 12 Feb 2021 17:28:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1613150898; bh=RiCZ/aIb+ohi4u6232sCNdL5GCcyH0Wu9wGtiKnfNzc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=OdL7A8joiblzjWmFQE0PGkAWE/hDMCy6fBslZEj/cEcYxFmO1fdjQSHnBTQu6Wn9d WEzYwTZhsOZdxNO8p008+dlIReh/Weqc+SUItaXSZSEk83lYDD6BX2YSP2lyf+RKp5 iEw7blMSs+HiIX00ztNeyq6/6lObcTTciGpzHGt4ecRlylsVU84MCqvkwPczg9etnt gVMAMxpvdJpRL6JQcmH85GsWtDt6SrVX1zKRqqw05E37P3CAFtlKpFQL22DxqWJFOa wR5JQi88hStX+cdHsnfAMtjoGg01olBgMqHkkBU1Swl/nyHx6rDA6sDEDCGM1ljLnF hTP9RODYaNfXQ== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id D0B05A005D; Fri, 12 Feb 2021 17:28:16 +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 , Bjorn Helgaas Cc: Gustavo Pimentel Subject: [PATCH v6 5/5] docs: ABI: Add sysfs documentation interface of dw-xdata-pcie driver Date: Fri, 12 Feb 2021 18:28:07 +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 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..09d38e1 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-xdata @@ -0,0 +1,46 @@ +What: /sys/bus/pci/drivers/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/bus/pci/drivers/dw-xdata-pcie/.../write + + The user can read the current PCIe link throughput generated + through this generator in MB/s. + Usage e.g. + cat /sys/bus/pci/drivers/dw-xdata-pcie/.../write + 204 + + The file is read and write. + +What: /sys/bus/pci/drivers/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/bus/pci/drivers/dw-xdata-pcie/.../read + + The user can read the current PCIe link throughput generated + through this generator in MB/s. + Usage e.g. + cat /sys/bus/pci/drivers/dw-xdata-pcie/.../read + 199 + + The file is read and write. + +What: /sys/bus/pci/drivers/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/bus/pci/drivers/dw-xdata-pcie/.../stop + + The file is write only.