Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752289AbdFZB7w (ORCPT ); Sun, 25 Jun 2017 21:59:52 -0400 Received: from mga07.intel.com ([134.134.136.100]:5365 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751723AbdFZB7l (ORCPT ); Sun, 25 Jun 2017 21:59:41 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,393,1493708400"; d="scan'208";a="118726526" From: Wu Hao To: atull@kernel.org, mdf@kernel.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Cc: linux-api@vger.kernel.org, luwei.kang@intel.com, yi.z.zhang@intel.com, hao.wu@intel.com, Tim Whisonant , Enno Luebbers , Shiva Rao , Christopher Rauer , Xiao Guangrong Subject: [PATCH v2 11/22] fpga: intel: add FPGA Management Engine driver basic framework Date: Mon, 26 Jun 2017 09:52:07 +0800 Message-Id: <1498441938-14046-12-git-send-email-hao.wu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1498441938-14046-1-git-send-email-hao.wu@intel.com> References: <1498441938-14046-1-git-send-email-hao.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6073 Lines: 224 From: Kang Luwei The FPGA Management Engine (FME) provides power, thermal management, performance counters, partial reconfiguration and other functions. For each function, it is packaged into a private feature linked to the FME feature device in the 'Device Feature List'. It's a platform device created by Intel FPGA PCIe driver. This patch adds the basic framework of FME platform driver. It defines sub feature drivers to handle the different sub features, including init, uinit and ioctl. It also registers the file operations for the device file. Signed-off-by: Tim Whisonant Signed-off-by: Enno Luebbers Signed-off-by: Shiva Rao Signed-off-by: Christopher Rauer Signed-off-by: Kang Luwei Signed-off-by: Xiao Guangrong Signed-off-by: Wu Hao --- v2: moved the code to drivers/fpga folder as suggested by Alan Tull. switched to GPLv2 license. --- drivers/fpga/Kconfig | 8 +++ drivers/fpga/Makefile | 2 + drivers/fpga/intel-fme-main.c | 156 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 166 insertions(+) create mode 100644 drivers/fpga/intel-fme-main.c diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig index 3f3b7f4..b91458f 100644 --- a/drivers/fpga/Kconfig +++ b/drivers/fpga/Kconfig @@ -143,6 +143,14 @@ config INTEL_FPGA_PCI To compile this as a module, choose M here. +config INTEL_FPGA_FME + tristate "Intel FPGA FME Driver" + depends on INTEL_FPGA_PCI + help + This is the driver for FPGA Management Engine which implements + all FPGA platform level management features. There shall be 1 + FME per Intel FPGA. + endif endif # FPGA diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile index ad24b3d..09bf281 100644 --- a/drivers/fpga/Makefile +++ b/drivers/fpga/Makefile @@ -30,5 +30,7 @@ obj-$(CONFIG_OF_FPGA_REGION) += of-fpga-region.o # Intel FPGA Support obj-$(CONFIG_INTEL_FPGA_PCI) += intel-fpga-pci.o +obj-$(CONFIG_INTEL_FPGA_FME) += intel-fpga-fme.o intel-fpga-pci-objs := intel-pcie.o intel-feature-dev.o +intel-fpga-fme-objs := intel-fme-main.o diff --git a/drivers/fpga/intel-fme-main.c b/drivers/fpga/intel-fme-main.c new file mode 100644 index 0000000..c16cf81 --- /dev/null +++ b/drivers/fpga/intel-fme-main.c @@ -0,0 +1,156 @@ +/* + * Driver for Intel FPGA Management Engine (FME) + * + * Copyright (C) 2017 Intel Corporation, Inc. + * + * Authors: + * Kang Luwei + * Xiao Guangrong + * Joseph Grecco + * Enno Luebbers + * Tim Whisonant + * Ananda Ravuri + * Henry Mitchel + * + * This work is licensed under the terms of the GNU GPL version 2. See + * the COPYING file in the top-level directory. + */ + +#include +#include + +#include "intel-feature-dev.h" + +static int fme_hdr_init(struct platform_device *pdev, struct feature *feature) +{ + dev_dbg(&pdev->dev, "FME HDR Init.\n"); + return 0; +} + +static void fme_hdr_uinit(struct platform_device *pdev, struct feature *feature) +{ + dev_dbg(&pdev->dev, "FME HDR UInit.\n"); +} + +struct feature_ops fme_hdr_ops = { + .init = fme_hdr_init, + .uinit = fme_hdr_uinit, +}; + +static struct feature_driver fme_feature_drvs[] = { + { + .name = FME_FEATURE_HEADER, + .ops = &fme_hdr_ops, + }, + { + .ops = NULL, + }, +}; + +static int fme_open(struct inode *inode, struct file *filp) +{ + struct platform_device *fdev = fpga_inode_to_feature_dev(inode); + struct feature_platform_data *pdata = dev_get_platdata(&fdev->dev); + int ret; + + if (WARN_ON(!pdata)) + return -ENODEV; + + ret = feature_dev_use_begin(pdata); + if (ret) + return ret; + + dev_dbg(&fdev->dev, "Device File Open\n"); + filp->private_data = pdata; + return 0; +} + +static int fme_release(struct inode *inode, struct file *filp) +{ + struct feature_platform_data *pdata = filp->private_data; + struct platform_device *pdev = pdata->dev; + + dev_dbg(&pdev->dev, "Device File Release\n"); + feature_dev_use_end(pdata); + return 0; +} + +static long fme_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + struct feature_platform_data *pdata = filp->private_data; + struct platform_device *pdev = pdata->dev; + struct feature *f; + long ret; + + dev_dbg(&pdev->dev, "%s cmd 0x%x\n", __func__, cmd); + + switch (cmd) { + default: + /* + * Let sub-feature's ioctl function to handle the cmd + * Sub-feature's ioctl returns -ENODEV when cmd is not + * handled in this sub feature, and returns 0 and other + * error code if cmd is handled. + */ + fpga_dev_for_each_feature(pdata, f) { + if (f->ops && f->ops->ioctl) { + ret = f->ops->ioctl(pdev, f, cmd, arg); + if (ret == -ENODEV) + continue; + else + return ret; + } + } + } + + return -EINVAL; +} + +static const struct file_operations fme_fops = { + .owner = THIS_MODULE, + .open = fme_open, + .release = fme_release, + .unlocked_ioctl = fme_ioctl, +}; + +static int fme_probe(struct platform_device *pdev) +{ + int ret; + + ret = fpga_dev_feature_init(pdev, fme_feature_drvs); + if (ret) + goto exit; + + ret = fpga_register_dev_ops(pdev, &fme_fops, THIS_MODULE); + if (ret) + goto feature_uinit; + + return 0; + +feature_uinit: + fpga_dev_feature_uinit(pdev); +exit: + return ret; +} + +static int fme_remove(struct platform_device *pdev) +{ + fpga_dev_feature_uinit(pdev); + fpga_unregister_dev_ops(pdev); + return 0; +} + +static struct platform_driver fme_driver = { + .driver = { + .name = FPGA_FEATURE_DEV_FME, + }, + .probe = fme_probe, + .remove = fme_remove, +}; + +module_platform_driver(fme_driver); + +MODULE_DESCRIPTION("Intel FPGA Management Engine driver"); +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:intel-fpga-fme"); -- 1.8.3.1