fpga: dfl: add fpga bridge platform driver for FME (de892dff) · Commits · 戴 / test

drivers/fpga/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -162,6 +162,12 @@ config FPGA_DFL_FME_MGR
		help
		Say Y to enable FPGA Manager driver for FPGA Management Engine.

		config FPGA_DFL_FME_BRIDGE
		tristate "FPGA DFL FME Bridge Driver"
		depends on FPGA_DFL_FME && HAS_IOMEM
		help
		Say Y to enable FPGA Bridge driver for FPGA Management Engine.

		config FPGA_DFL_PCI
		tristate "FPGA DFL PCIe Device Driver"
		depends on PCI && FPGA_DFL

drivers/fpga/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -33,6 +33,7 @@ obj-$(CONFIG_OF_FPGA_REGION) += of-fpga-region.o
		obj-$(CONFIG_FPGA_DFL) += dfl.o
		obj-$(CONFIG_FPGA_DFL_FME) += dfl-fme.o
		obj-$(CONFIG_FPGA_DFL_FME_MGR) += dfl-fme-mgr.o
		obj-$(CONFIG_FPGA_DFL_FME_BRIDGE) += dfl-fme-br.o

		dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o

drivers/fpga/dfl-fme-br.c

0 → 100644

+114 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* FPGA Bridge Driver for FPGA Management Engine (FME)
		*
		* Copyright (C) 2017-2018 Intel Corporation, Inc.
		*
		* Authors:
		* Wu Hao <hao.wu@intel.com>
		* Joseph Grecco <joe.grecco@intel.com>
		* Enno Luebbers <enno.luebbers@intel.com>
		* Tim Whisonant <tim.whisonant@intel.com>
		* Ananda Ravuri <ananda.ravuri@intel.com>
		* Henry Mitchel <henry.mitchel@intel.com>
		*/

		#include <linux/module.h>
		#include <linux/fpga/fpga-bridge.h>

		#include "dfl.h"
		#include "dfl-fme-pr.h"

		struct fme_br_priv {
		struct dfl_fme_br_pdata *pdata;
		struct dfl_fpga_port_ops *port_ops;
		struct platform_device *port_pdev;
		};

		static int fme_bridge_enable_set(struct fpga_bridge *bridge, bool enable)
		{
		struct fme_br_priv *priv = bridge->priv;
		struct platform_device *port_pdev;
		struct dfl_fpga_port_ops *ops;

		if (!priv->port_pdev) {
		port_pdev = dfl_fpga_cdev_find_port(priv->pdata->cdev,
		&priv->pdata->port_id,
		dfl_fpga_check_port_id);
		if (!port_pdev)
		return -ENODEV;

		priv->port_pdev = port_pdev;
		}

		if (priv->port_pdev && !priv->port_ops) {
		ops = dfl_fpga_port_ops_get(priv->port_pdev);
		if (!ops \|\| !ops->enable_set)
		return -ENOENT;

		priv->port_ops = ops;
		}

		return priv->port_ops->enable_set(priv->port_pdev, enable);
		}

		static const struct fpga_bridge_ops fme_bridge_ops = {
		.enable_set = fme_bridge_enable_set,
		};

		static int fme_br_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct fme_br_priv *priv;
		struct fpga_bridge *br;
		int ret;

		priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
		if (!priv)
		return -ENOMEM;

		priv->pdata = dev_get_platdata(dev);

		br = fpga_bridge_create(dev, "DFL FPGA FME Bridge",
		&fme_bridge_ops, priv);
		if (!br)
		return -ENOMEM;

		platform_set_drvdata(pdev, br);

		ret = fpga_bridge_register(br);
		if (ret)
		fpga_bridge_free(br);

		return ret;
		}

		static int fme_br_remove(struct platform_device *pdev)
		{
		struct fpga_bridge *br = platform_get_drvdata(pdev);
		struct fme_br_priv *priv = br->priv;

		fpga_bridge_unregister(br);

		if (priv->port_pdev)
		put_device(&priv->port_pdev->dev);
		if (priv->port_ops)
		dfl_fpga_port_ops_put(priv->port_ops);

		return 0;
		}

		static struct platform_driver fme_br_driver = {
		.driver = {
		.name = DFL_FPGA_FME_BRIDGE,
		},
		.probe = fme_br_probe,
		.remove = fme_br_remove,
		};

		module_platform_driver(fme_br_driver);

		MODULE_DESCRIPTION("FPGA Bridge for DFL FPGA Management Engine");
		MODULE_AUTHOR("Intel Corporation");
		MODULE_LICENSE("GPL v2");
		MODULE_ALIAS("platform:dfl-fme-bridge");

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