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
fme_region_get_bridges(struct fpga_region * region)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
fme_region_probe(struct platform_device * pdev)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
fme_region_remove(struct platform_device * pdev)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