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, ®ion->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 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 = 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 region_free; 55 56 dev_dbg(dev, "DFL FME FPGA Region probed\n"); 57 58 return 0; 59 60 region_free: 61 fpga_region_free(region); 62 eprobe_mgr_put: 63 fpga_mgr_put(mgr); 64 return ret; 65 } 66 67 static int fme_region_remove(struct platform_device *pdev) 68 { 69 struct fpga_region *region = dev_get_drvdata(&pdev->dev); 70 struct fpga_manager *mgr = region->mgr; 71 72 fpga_region_unregister(region); 73 fpga_mgr_put(mgr); 74 75 return 0; 76 } 77 78 static struct platform_driver fme_region_driver = { 79 .driver = { 80 .name = DFL_FPGA_FME_REGION, 81 }, 82 .probe = fme_region_probe, 83 .remove = fme_region_remove, 84 }; 85 86 module_platform_driver(fme_region_driver); 87 88 MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine"); 89 MODULE_AUTHOR("Intel Corporation"); 90 MODULE_LICENSE("GPL v2"); 91 MODULE_ALIAS("platform:dfl-fme-region"); 92