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, info: region->info, bridge_list: ®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(dev: &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(dev: &pdata->mgr->dev); |
40 | if (IS_ERR(ptr: 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(parent: dev, info: &info); |
48 | if (IS_ERR(ptr: region)) { |
49 | ret = PTR_ERR(ptr: region); |
50 | goto eprobe_mgr_put; |
51 | } |
52 | |
53 | platform_set_drvdata(pdev, data: 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 int 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 | return 0; |
73 | } |
74 | |
75 | static struct platform_driver fme_region_driver = { |
76 | .driver = { |
77 | .name = DFL_FPGA_FME_REGION, |
78 | }, |
79 | .probe = fme_region_probe, |
80 | .remove = fme_region_remove, |
81 | }; |
82 | |
83 | module_platform_driver(fme_region_driver); |
84 | |
85 | MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine" ); |
86 | MODULE_AUTHOR("Intel Corporation" ); |
87 | MODULE_LICENSE("GPL v2" ); |
88 | MODULE_ALIAS("platform:dfl-fme-region" ); |
89 | |