dfl-fme-region.c 2.1 KB

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  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. #include <linux/module.h>
  16. #include <linux/fpga/fpga-mgr.h>
  17. #include <linux/fpga/fpga-region.h>
  18. #include "dfl-fme-pr.h"
  19. static int fme_region_get_bridges(struct fpga_region *region)
  20. {
  21. struct dfl_fme_region_pdata *pdata = region->priv;
  22. struct device *dev = &pdata->br->dev;
  23. return fpga_bridge_get_to_list(dev, region->info, &region->bridge_list);
  24. }
  25. static int fme_region_probe(struct platform_device *pdev)
  26. {
  27. struct dfl_fme_region_pdata *pdata = dev_get_platdata(&pdev->dev);
  28. struct device *dev = &pdev->dev;
  29. struct fpga_region *region;
  30. struct fpga_manager *mgr;
  31. int ret;
  32. mgr = fpga_mgr_get(&pdata->mgr->dev);
  33. if (IS_ERR(mgr))
  34. return -EPROBE_DEFER;
  35. region = devm_fpga_region_create(dev, mgr, fme_region_get_bridges);
  36. if (!region) {
  37. ret = -ENOMEM;
  38. goto eprobe_mgr_put;
  39. }
  40. region->priv = pdata;
  41. region->compat_id = mgr->compat_id;
  42. platform_set_drvdata(pdev, region);
  43. ret = fpga_region_register(region);
  44. if (ret)
  45. goto eprobe_mgr_put;
  46. dev_dbg(dev, "DFL FME FPGA Region probed\n");
  47. return 0;
  48. eprobe_mgr_put:
  49. fpga_mgr_put(mgr);
  50. return ret;
  51. }
  52. static int fme_region_remove(struct platform_device *pdev)
  53. {
  54. struct fpga_region *region = platform_get_drvdata(pdev);
  55. struct fpga_manager *mgr = region->mgr;
  56. fpga_region_unregister(region);
  57. fpga_mgr_put(mgr);
  58. return 0;
  59. }
  60. static struct platform_driver fme_region_driver = {
  61. .driver = {
  62. .name = DFL_FPGA_FME_REGION,
  63. },
  64. .probe = fme_region_probe,
  65. .remove = fme_region_remove,
  66. };
  67. module_platform_driver(fme_region_driver);
  68. MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine");
  69. MODULE_AUTHOR("Intel Corporation");
  70. MODULE_LICENSE("GPL v2");
  71. MODULE_ALIAS("platform:dfl-fme-region");