drivers/fpga/dfl-fme-region.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * FPGA Region Driver for FPGA Management Engine (FME)
0004  *
0005  * Copyright (C) 2017-2018 Intel Corporation, Inc.
0006  *
0007  * Authors:
0008  *   Wu Hao <hao.wu@intel.com>
0009  *   Joseph Grecco <joe.grecco@intel.com>
0010  *   Enno Luebbers <enno.luebbers@intel.com>
0011  *   Tim Whisonant <tim.whisonant@intel.com>
0012  *   Ananda Ravuri <ananda.ravuri@intel.com>
0013  *   Henry Mitchel <henry.mitchel@intel.com>
0014  */
0015
0016 #include <linux/module.h>
0017 #include <linux/fpga/fpga-mgr.h>
0018 #include <linux/fpga/fpga-region.h>
0019
0020 #include "dfl-fme-pr.h"
0021
0022 static int fme_region_get_bridges(struct fpga_region *region)
0023 {
0024     struct dfl_fme_region_pdata *pdata = region->priv;
0025     struct device *dev = &pdata->br->dev;
0026
0027     return fpga_bridge_get_to_list(dev, region->info, &region->bridge_list);
0028 }
0029
0030 static int fme_region_probe(struct platform_device *pdev)
0031 {
0032     struct dfl_fme_region_pdata *pdata = dev_get_platdata(&pdev->dev);
0033     struct fpga_region_info info = { 0 };
0034     struct device *dev = &pdev->dev;
0035     struct fpga_region *region;
0036     struct fpga_manager *mgr;
0037     int ret;
0038
0039     mgr = fpga_mgr_get(&pdata->mgr->dev);
0040     if (IS_ERR(mgr))
0041         return -EPROBE_DEFER;
0042
0043     info.mgr = mgr;
0044     info.compat_id = mgr->compat_id;
0045     info.get_bridges = fme_region_get_bridges;
0046     info.priv = pdata;
0047     region = fpga_region_register_full(dev, &info);
0048     if (IS_ERR(region)) {
0049         ret = PTR_ERR(region);
0050         goto eprobe_mgr_put;
0051     }
0052
0053     platform_set_drvdata(pdev, region);
0054
0055     dev_dbg(dev, "DFL FME FPGA Region probed\n");
0056
0057     return 0;
0058
0059 eprobe_mgr_put:
0060     fpga_mgr_put(mgr);
0061     return ret;
0062 }
0063
0064 static int fme_region_remove(struct platform_device *pdev)
0065 {
0066     struct fpga_region *region = platform_get_drvdata(pdev);
0067     struct fpga_manager *mgr = region->mgr;
0068
0069     fpga_region_unregister(region);
0070     fpga_mgr_put(mgr);
0071
0072     return 0;
0073 }
0074
0075 static struct platform_driver fme_region_driver = {
0076     .driver = {
0077         .name    = DFL_FPGA_FME_REGION,
0078     },
0079     .probe   = fme_region_probe,
0080     .remove  = fme_region_remove,
0081 };
0082
0083 module_platform_driver(fme_region_driver);
0084
0085 MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine");
0086 MODULE_AUTHOR("Intel Corporation");
0087 MODULE_LICENSE("GPL v2");
0088 MODULE_ALIAS("platform:dfl-fme-region");