projects / linux-block.git / blame
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|---|---|---|
| bb61b9be WH |
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> | |
| 34bd2833 | 17 | #include <linux/fpga/fpga-mgr.h> |
| bb61b9be WH |
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 | ||
| fea82b7f | 42 | region = devm_fpga_region_create(dev, mgr, fme_region_get_bridges); |
| bb61b9be WH |
43 | if (!region) { |
| 44 | ret = -ENOMEM; | |
| 45 | goto eprobe_mgr_put; | |
| 46 | } | |
| 47 | ||
| 48 | region->priv = pdata; | |
| 7514a424 | 49 | region->compat_id = mgr->compat_id; |
| bb61b9be WH |
50 | platform_set_drvdata(pdev, region); |
| 51 | ||
| 52 | ret = fpga_region_register(region); | |
| 53 | if (ret) | |
| fea82b7f | 54 | goto eprobe_mgr_put; |
| bb61b9be WH |
55 | |
| 56 | dev_dbg(dev, "DFL FME FPGA Region probed\n"); | |
| 57 | ||
| 58 | return 0; | |
| 59 | ||
| bb61b9be WH |
60 | eprobe_mgr_put: |
| 61 | fpga_mgr_put(mgr); | |
| 62 | return ret; | |
| 63 | } | |
| 64 | ||
| 65 | static int fme_region_remove(struct platform_device *pdev) | |
| 66 | { | |
| b77c9878 | 67 | struct fpga_region *region = platform_get_drvdata(pdev); |
| 34bd2833 | 68 | struct fpga_manager *mgr = region->mgr; |
| bb61b9be WH |
69 | |
| 70 | fpga_region_unregister(region); | |
| 34bd2833 | 71 | fpga_mgr_put(mgr); |
| bb61b9be WH |
72 | |
| 73 | return 0; | |
| 74 | } | |
| 75 | ||
| 76 | static 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 | ||
| 84 | module_platform_driver(fme_region_driver); | |
| 85 | ||
| 86 | MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine"); | |
| 87 | MODULE_AUTHOR("Intel Corporation"); | |
| 88 | MODULE_LICENSE("GPL v2"); | |
| 89 | MODULE_ALIAS("platform:dfl-fme-region"); |