From patchwork Mon Mar 29 11:17:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12169939 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,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 B24D2C433C1 for ; Mon, 29 Mar 2021 11:19:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DFCD61554 for ; Mon, 29 Mar 2021 11:19:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232795AbhC2LSd (ORCPT ); Mon, 29 Mar 2021 07:18:33 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:46698 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232053AbhC2LSB (ORCPT ); Mon, 29 Mar 2021 07:18:01 -0400 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 A216B4057D; Mon, 29 Mar 2021 11:18:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1617016681; bh=N9r24OiLLgiICrdjQMAZeZfyMe8qy0aD4hKKFFg8OYQ=; h=From:To:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=JgvTM3OcLK40bXkRJxe/Ivy3xniaGZJywbaOAwe+W3bTKtiz6p9xY2BwIqgE4WTkU Yxq4sl9aZ4KITmZizMRhAjmObOor+HwfmL00ZqSZIXXT5lQE7iNi62Tlw3Ldhcm3Ta nWqELPXLoozzIP9N/MNXAtsQDAJVUrYDMnSbepspFXW84tkcUB13T/JBuJARbz9h7s FtRybS7fXXv75AY4N0hqJ6npaUBxKQkaUh59FOLhlEiFfedQVhIhjgt2yTO1DMVUpW I05GNxUVGzjCUmuJePy7ceGZlHqCWSSBOxHIi/8dGT9r1olZm1tZfqWLctnXvzP8DR txmZqwnPtRZ1w== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 65AFDA0230; Mon, 29 Mar 2021 11:17:59 +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 , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Gustavo Pimentel Subject: [PATCH v10 1/4] misc: Add Synopsys DesignWare xData IP driver Date: Mon, 29 Mar 2021 13:17:45 +0200 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/Kconfig | 10 ++ drivers/misc/Makefile | 1 + drivers/misc/dw-xdata-pcie.c | 420 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 431 insertions(+) create mode 100644 drivers/misc/dw-xdata-pcie.c diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index f532c59..e6af9ff 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -402,6 +402,16 @@ 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 99b6f15..5411996 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -47,6 +47,7 @@ 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-$(CONFIG_OCXL) += ocxl/ obj-$(CONFIG_BCM_VK) += bcm-vk/ diff --git a/drivers/misc/dw-xdata-pcie.c b/drivers/misc/dw-xdata-pcie.c new file mode 100644 index 00000000..257c25d --- /dev/null +++ b/drivers/misc/dw-xdata-pcie.c @@ -0,0 +1,420 @@ +// 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 +#include + +#define DW_XDATA_DRIVER_NAME "dw-xdata-pcie" + +#define DW_XDATA_EP_MEM_OFFSET 0x8000000 + +static DEFINE_IDA(xdata_ida); + +#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 */ +}; + +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; + struct miscdevice misc_dev; +}; + +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) +{ + struct device *dev = &dw->pdev->dev; + 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)) + dev_dbg(dev, "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) +{ + struct device *dev = &dw->pdev->dev; + 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); + + dev_dbg(dev, "xData: time=%llu us, %s=%llu MB/s\n", + diff, write ? "write" : "read", *rate); +} + +static struct dw_xdata *misc_dev_to_dw(struct miscdevice *misc_dev) +{ + return container_of(misc_dev, struct dw_xdata, misc_dev); +} + +static ssize_t write_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct miscdevice *misc_dev = dev_get_drvdata(dev); + struct dw_xdata *dw = misc_dev_to_dw(misc_dev); + 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 miscdevice *misc_dev = dev_get_drvdata(dev); + struct dw_xdata *dw = misc_dev_to_dw(misc_dev); + bool enabled; + int ret; + + ret = kstrtobool(buf, &enabled); + if (ret < 0) + return ret; + + if (enabled) { + dev_dbg(dev, "xData: requested write transfer\n"); + dw_xdata_start(dw, true); + } else { + dev_dbg(dev, "xData: requested stop transfer\n"); + dw_xdata_stop(dw); + } + + return size; +} + +static DEVICE_ATTR_RW(write); + +static ssize_t read_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct miscdevice *misc_dev = dev_get_drvdata(dev); + struct dw_xdata *dw = misc_dev_to_dw(misc_dev); + 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 miscdevice *misc_dev = dev_get_drvdata(dev); + struct dw_xdata *dw = misc_dev_to_dw(misc_dev); + bool enabled; + int ret; + + ret = kstrtobool(buf, &enabled); + if (ret < 0) + return ret; + + if (enabled) { + dev_dbg(dev, "xData: requested read transfer\n"); + dw_xdata_start(dw, false); + } else { + dev_dbg(dev, "xData: requested stop transfer\n"); + dw_xdata_stop(dw); + } + + return size; +} + +static DEVICE_ATTR_RW(read); + +static struct attribute *xdata_attrs[] = { + &dev_attr_write.attr, + &dev_attr_read.attr, + NULL, +}; + +ATTRIBUTE_GROUPS(xdata); + +static int dw_xdata_pcie_probe(struct pci_dev *pdev, + const struct pci_device_id *pid) +{ + struct device *dev = &pdev->dev; + struct dw_xdata *dw; + char name[24]; + u64 addr; + int err; + int id; + + /* Enable PCI device */ + err = pcim_enable_device(pdev); + if (err) { + dev_err(dev, "enabling device failed\n"); + return err; + } + + /* Mapping PCI BAR regions */ + err = pcim_iomap_regions(pdev, BIT(BAR_0), pci_name(pdev)); + if (err) { + dev_err(dev, "xData BAR I/O remapping failed\n"); + return err; + } + + pci_set_master(pdev); + + /* Allocate memory */ + dw = devm_kzalloc(dev, sizeof(*dw), GFP_KERNEL); + if (!dw) + return -ENOMEM; + + /* Data structure initialization */ + mutex_init(&dw->mutex); + + dw->rg_region.vaddr = pcim_iomap_table(pdev)[BAR_0]; + if (!dw->rg_region.vaddr) + return -ENOMEM; + + dw->rg_region.paddr = pdev->resource[BAR_0].start; + + 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; + + id = ida_simple_get(&xdata_ida, 0, 0, GFP_KERNEL); + if (id < 0) { + dev_err(dev, "xData: unable to get id\n"); + return id; + } + + snprintf(name, sizeof(name), DW_XDATA_DRIVER_NAME ".%d", id); + dw->misc_dev.name = kstrdup(name, GFP_KERNEL); + if (!dw->misc_dev.name) { + err = -ENOMEM; + goto err_ida_remove; + } + + dw->misc_dev.minor = MISC_DYNAMIC_MINOR; + dw->misc_dev.parent = dev; + dw->misc_dev.groups = xdata_groups; + + 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)); + dev_dbg(dev, "xData: target address = 0x%.16llx\n", addr); + + dev_dbg(dev, "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); + + /* Register misc device */ + err = misc_register(&dw->misc_dev); + if (err) { + dev_err(dev, "xData: failed to register device\n"); + goto err_kfree_name; + } + + return 0; + +err_kfree_name: + kfree(dw->misc_dev.name); + +err_ida_remove: + ida_simple_remove(&xdata_ida, id); + + return err; +} + +static void dw_xdata_pcie_remove(struct pci_dev *pdev) +{ + struct dw_xdata *dw = pci_get_drvdata(pdev); + int id; + + if (sscanf(dw->misc_dev.name, DW_XDATA_DRIVER_NAME ".%d", &id) != 1) + return; + + if (id < 0) + return; + + dw_xdata_stop(dw); + misc_deregister(&dw->misc_dev); + kfree(dw->misc_dev.name); + ida_simple_remove(&xdata_ida, id); +} + +static const struct pci_device_id dw_xdata_pcie_id_table[] = { + { PCI_DEVICE_DATA(SYNOPSYS, EDDA, NULL) }, + { } +}; +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 Mon Mar 29 11:17:46 2021 Content-Type: text/plain; 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Mon, 29 Mar 2021 11:18:00 +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 , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Gustavo Pimentel Subject: [PATCH v10 2/4] Documentation: misc-devices: Add Documentation for dw-xdata-pcie driver Date: Mon, 29 Mar 2021 13:17:46 +0200 Message-Id: <764b9bf744d7fe20c7a216019eef8ddf482c1bd7.1617016509.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..fd75c93 --- /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/class/misc/dw-xdata-pcie/write + +Get write TLPs traffic link throughput in MB/s +- Command: + cat /sys/class/misc/dw-xdata-pcie/write +- Output example: + 204 + +Request read TLPs traffic generation - Endpoint to Root Complex direction: +- Command: + echo 1 > /sys/class/misc/dw-xdata-pcie/read + +Get read TLPs traffic link throughput in MB/s +- Command: + cat /sys/class/misc/dw-xdata-pcie/read +- Output example: + 199 + +Request to stop any current TLP transfer: +- Command: + echo 1 > /sys/class/misc/dw-xdata-pcie/stop From patchwork Mon Mar 29 11:17:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12169945 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,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 96A5AC433E5 for ; Mon, 29 Mar 2021 11:19:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7CFF761985 for ; Mon, 29 Mar 2021 11:19:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232805AbhC2LSe (ORCPT ); Mon, 29 Mar 2021 07:18:34 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:52388 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232517AbhC2LSE (ORCPT ); Mon, 29 Mar 2021 07:18:04 -0400 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 77A90C049B; Mon, 29 Mar 2021 11:18:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1617016682; bh=5cMTfaevxwhLCPNLc3DOzhIMBgSPdAEVTKWnQRu8vbI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=dcyKplOmmYUa6e5QgBpCkrNeb/cbQT+PUnOv//hk5Nmz7VGz307W81K94Qa1udpjr aK7Z5wUxXMLlrJb2qwzQw85v+/h6Y58ior207wuJheGXPJecfLQ+MY1/+S5+3IwZT0 xf/RRaOkbP9qB/thXpiyST+EwI7GN1EY+muXVWOSoMIZcZFfX47ESmsKPwzoWMv/EW dLqESNxUiImLLb4yUTW2JWV7dUNMGpr3sNz0pbdO3KbQZ0MSPguThs4trPI4t6xg/e 6fieu4Nl2s51fXsL5FVNdYMpGdx+vxhYGteJEGPDeqlADBawOxIPe1AgXVNjTmsB8F kU/1gh0XO0Dlw== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 3905DA0231; Mon, 29 Mar 2021 11:18:01 +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 , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= Cc: Gustavo Pimentel Subject: [PATCH v10 3/4] MAINTAINERS: Add Synopsys xData IP driver maintainer Date: Mon, 29 Mar 2021 13:17:47 +0200 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 9e87692..36387b3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5099,6 +5099,13 @@ 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 Mon Mar 29 11:17:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12169947 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,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 C3BB9C433E9 for ; Mon, 29 Mar 2021 11:19:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B344661585 for ; Mon, 29 Mar 2021 11:19:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232464AbhC2LSe (ORCPT ); Mon, 29 Mar 2021 07:18:34 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:46732 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232208AbhC2LSD (ORCPT ); Mon, 29 Mar 2021 07:18:03 -0400 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 8714C405C4; Mon, 29 Mar 2021 11:18:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1617016683; bh=iSxtzBdDE2cJnjE+FKkXJyxRBdv7BWhqnOaNUTMnKw0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=MnleN+marL8tlDKG4oFA9Ec6DYnbs2I4LGW2YLQ4dFBxr64tLtSQOBYOdjl+vgrSv 1ppTkZS2ylh463eR28qs3/ykZLV9D9lS8P1axZXoLiTbsgnMjL4yHa0P/nrcmIB0lL 0M9Z0jRQ7Zp8JAzXstnVD5um6kpEcIs17H0tFLv2hMkADjiKkTNZUSfGI1PxDmhAHE 1FGf2Z9/3cLnetvbiPy3xylm5Rn2zfmKQcFJ5XdbsPgDaUqSz48L5eWmw6FXuyGlsA Bair0CdR+WnTip2UaGAEoEetT8DzzYf4OCRBsm9uczPg7ZVfwE6gmcDcv76veTgwP9 vclu1ob9qiZsA== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 4D74EA022E; Mon, 29 Mar 2021 11:18:02 +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 , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= Cc: Gustavo Pimentel Subject: [PATCH v10 4/4] docs: ABI: Add sysfs documentation interface of dw-xdata-pcie driver Date: Mon, 29 Mar 2021 13:17:48 +0200 Message-Id: <438c4ca9f6cc9e1cb29a65c0d2cca9a3d3f181b1.1617016509.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 | 49 ++++++++++++++++++++++++++++ 1 file changed, 49 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..f574e8e --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-xdata @@ -0,0 +1,49 @@ +What: /sys/class/misc/drivers/dw-xdata-pcie./write +Date: April 2021 +KernelVersion: 5.13 +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 or to disable the PCIe traffic generator + in all directions. + + Write y/1/on to enable, n/0/off to disable + + Usage e.g. + echo 1 > /sys/class/misc/dw-xdata-pcie./write + or + echo 0 > /sys/class/misc/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/class/misc/dw-xdata-pcie./write + 204 + + The file is read and write. + +What: /sys/class/misc/dw-xdata-pcie./read +Date: April 2021 +KernelVersion: 5.13 +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 or to disable the PCIe traffic generator + in all directions. + + Write y/1/on to enable, n/0/off to disable + + Usage e.g. + echo 1 > /sys/class/misc/dw-xdata-pcie./read + or + echo 0 > /sys/class/misc/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/class/misc/dw-xdata-pcie./read + 199 + + The file is read and write.