LXR linux/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
  22static 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
  30static int fme_region_probe(struct platform_device *pdev)
  31{
  32        struct dfl_fme_region_pdata *pdata = dev_get_platdata(&pdev->dev);
  33        struct device *dev = &pdev->dev;
  34        struct fpga_region *region;
  35        struct fpga_manager *mgr;
  36        int ret;
  37
  38        mgr = fpga_mgr_get(&pdata->mgr->dev);
  39        if (IS_ERR(mgr))
  40                return -EPROBE_DEFER;
  41
  42        region = devm_fpga_region_create(dev, mgr, fme_region_get_bridges);
  43        if (!region) {
  44                ret = -ENOMEM;
  45                goto eprobe_mgr_put;
  46        }
  47
  48        region->priv = pdata;
  49        region->compat_id = mgr->compat_id;
  50        platform_set_drvdata(pdev, region);
  51
  52        ret = fpga_region_register(region);
  53        if (ret)
  54                goto eprobe_mgr_put;
  55
  56        dev_dbg(dev, "DFL FME FPGA Region probed\n");
  57
  58        return 0;
  59
  60eprobe_mgr_put:
  61        fpga_mgr_put(mgr);
  62        return ret;
  63}
  64
  65static int fme_region_remove(struct platform_device *pdev)
  66{
  67        struct fpga_region *region = platform_get_drvdata(pdev);
  68        struct fpga_manager *mgr = region->mgr;
  69
  70        fpga_region_unregister(region);
  71        fpga_mgr_put(mgr);
  72
  73        return 0;
  74}
  75
  76static struct platform_driver fme_region_driver = {
  77        .driver = {
  78                .name    = DFL_FPGA_FME_REGION,
  79        },
  80        .probe   = fme_region_probe,
  81        .remove  = fme_region_remove,
  82};
  83
  84module_platform_driver(fme_region_driver);
  85
  86MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine");
  87MODULE_AUTHOR("Intel Corporation");
  88MODULE_LICENSE("GPL v2");
  89MODULE_ALIAS("platform:dfl-fme-region");
  90