drivers/fpga/dfl-fme-region.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * FPGA Region Driver for FPGA Management Engine (FME)
   4  *
   5  * Copyright (C) 2017-2018 Intel Corporation, Inc.
   6  *
   7  * Authors:
   8  *   Wu Hao <hao.wu@intel.com>
   9  *   Joseph Grecco <joe.grecco@intel.com>
  10  *   Enno Luebbers <enno.luebbers@intel.com>
  11  *   Tim Whisonant <tim.whisonant@intel.com>
  12  *   Ananda Ravuri <ananda.ravuri@intel.com>
  13  *   Henry Mitchel <henry.mitchel@intel.com>
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/fpga/fpga-mgr.h>
  18 #include <linux/fpga/fpga-region.h>
  19
  20 #include "dfl-fme-pr.h"
  21
  22 static int fme_region_get_bridges(struct fpga_region *region)
  23 {
  24         struct dfl_fme_region_pdata *pdata = region->priv;
  25         struct device *dev = &pdata->br->dev;
  26
  27         return fpga_bridge_get_to_list(dev, region->info, &region->bridge_list);
  28 }
  29
  30 static int fme_region_probe(struct platform_device *pdev)
  31 {
  32         struct dfl_fme_region_pdata *pdata = dev_get_platdata(&pdev->dev);
  33         struct fpga_region_info info = { 0 };
  34         struct device *dev = &pdev->dev;
  35         struct fpga_region *region;
  36         struct fpga_manager *mgr;
  37         int ret;
  38
  39         mgr = fpga_mgr_get(&pdata->mgr->dev);
  40         if (IS_ERR(mgr))
  41                 return -EPROBE_DEFER;
  42
  43         info.mgr = mgr;
  44         info.compat_id = mgr->compat_id;
  45         info.get_bridges = fme_region_get_bridges;
  46         info.priv = pdata;
  47         region = fpga_region_register_full(dev, &info);
  48         if (IS_ERR(region)) {
  49                 ret = PTR_ERR(region);
  50                 goto eprobe_mgr_put;
  51         }
  52
  53         platform_set_drvdata(pdev, region);
  54
  55         dev_dbg(dev, "DFL FME FPGA Region probed\n");
  56
  57         return 0;
  58
  59 eprobe_mgr_put:
  60         fpga_mgr_put(mgr);
  61         return ret;
  62 }
  63
  64 static void fme_region_remove(struct platform_device *pdev)
  65 {
  66         struct fpga_region *region = platform_get_drvdata(pdev);
  67         struct fpga_manager *mgr = region->mgr;
  68
  69         fpga_region_unregister(region);
  70         fpga_mgr_put(mgr);
  71 }
  72
  73 static struct platform_driver fme_region_driver = {
  74         .driver = {
  75                 .name = DFL_FPGA_FME_REGION,
  76         },
  77         .probe = fme_region_probe,
  78         .remove = fme_region_remove,
  79 };
  80
  81 module_platform_driver(fme_region_driver);
  82
  83 MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine");
  84 MODULE_AUTHOR("Intel Corporation");
  85 MODULE_LICENSE("GPL v2");
  86 MODULE_ALIAS("platform:dfl-fme-region");