Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933879AbdC3MSV (ORCPT ); Thu, 30 Mar 2017 08:18:21 -0400 Received: from mga02.intel.com ([134.134.136.20]:12144 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933782AbdC3MPw (ORCPT ); Thu, 30 Mar 2017 08:15:52 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.36,246,1486454400"; d="scan'208";a="840018229" From: Wu Hao To: atull@kernel.org, moritz.fischer@ettus.com, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Cc: 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 08/16] fpga: intel: add FPGA Management Engine driver basic framework Date: Thu, 30 Mar 2017 20:08:08 +0800 Message-Id: <1490875696-15145-9-git-send-email-hao.wu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1490875696-15145-1-git-send-email-hao.wu@intel.com> References: <1490875696-15145-1-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: 6067 Lines: 219 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 --- drivers/fpga/intel/Kconfig | 8 +++ drivers/fpga/intel/Makefile | 2 + drivers/fpga/intel/fme-main.c | 158 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 168 insertions(+) create mode 100644 drivers/fpga/intel/fme-main.c diff --git a/drivers/fpga/intel/Kconfig b/drivers/fpga/intel/Kconfig index bf402f3..62e2160 100644 --- a/drivers/fpga/intel/Kconfig +++ b/drivers/fpga/intel/Kconfig @@ -24,4 +24,12 @@ 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 diff --git a/drivers/fpga/intel/Makefile b/drivers/fpga/intel/Makefile index c029940..546861d 100644 --- a/drivers/fpga/intel/Makefile +++ b/drivers/fpga/intel/Makefile @@ -1,3 +1,5 @@ obj-$(CONFIG_INTEL_FPGA_PCI) += intel-fpga-pci.o +obj-$(CONFIG_INTEL_FPGA_FME) += intel-fpga-fme.o intel-fpga-pci-objs := pcie.o feature-dev.o +intel-fpga-fme-objs := 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..c603268 --- /dev/null +++ b/drivers/fpga/intel/fme-main.c @@ -0,0 +1,158 @@ +/* + * 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 a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. See the + * LICENSE.BSD file under this directory for the BSD license and see + * the COPYING file in the top-level directory for the GPLv2 license. + */ + +#include +#include + +#include "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("Dual BSD/GPL"); +MODULE_ALIAS("platform:intel-fpga-fme"); -- 2.7.4