1 /* 2 * SPDX-License-Identifier: MIT 3 * 4 * Copyright © 2021 Intel Corporation 5 */ 6 7 #include <drm/drm_drv.h> 8 9 #include "gem/i915_gem_context.h" 10 #include "gem/i915_gem_object.h" 11 #include "i915_active.h" 12 #include "i915_params.h" 13 #include "i915_pci.h" 14 #include "i915_perf.h" 15 #include "i915_request.h" 16 #include "i915_scheduler.h" 17 #include "i915_selftest.h" 18 #include "i915_vma.h" 19 20 static int i915_check_nomodeset(void) 21 { 22 bool use_kms = true; 23 24 /* 25 * Enable KMS by default, unless explicitly overriden by 26 * either the i915.modeset parameter or by the 27 * nomodeset boot option. 28 */ 29 30 if (i915_modparams.modeset == 0) 31 use_kms = false; 32 33 if (drm_firmware_drivers_only() && i915_modparams.modeset == -1) 34 use_kms = false; 35 36 if (!use_kms) { 37 /* Silently fail loading to not upset userspace. */ 38 DRM_DEBUG_DRIVER("KMS disabled.\n"); 39 return 1; 40 } 41 42 return 0; 43 } 44 45 static const struct { 46 int (*init)(void); 47 void (*exit)(void); 48 } init_funcs[] = { 49 { .init = i915_check_nomodeset }, 50 { .init = i915_active_module_init, 51 .exit = i915_active_module_exit }, 52 { .init = i915_context_module_init, 53 .exit = i915_context_module_exit }, 54 { .init = i915_gem_context_module_init, 55 .exit = i915_gem_context_module_exit }, 56 { .init = i915_objects_module_init, 57 .exit = i915_objects_module_exit }, 58 { .init = i915_request_module_init, 59 .exit = i915_request_module_exit }, 60 { .init = i915_scheduler_module_init, 61 .exit = i915_scheduler_module_exit }, 62 { .init = i915_vma_module_init, 63 .exit = i915_vma_module_exit }, 64 { .init = i915_mock_selftests }, 65 { .init = i915_pmu_init, 66 .exit = i915_pmu_exit }, 67 { .init = i915_pci_register_driver, 68 .exit = i915_pci_unregister_driver }, 69 { .init = i915_perf_sysctl_register, 70 .exit = i915_perf_sysctl_unregister }, 71 }; 72 static int init_progress; 73 74 static int __init i915_init(void) 75 { 76 int err, i; 77 78 for (i = 0; i < ARRAY_SIZE(init_funcs); i++) { 79 err = init_funcs[i].init(); 80 if (err < 0) { 81 while (i--) { 82 if (init_funcs[i].exit) 83 init_funcs[i].exit(); 84 } 85 return err; 86 } else if (err > 0) { 87 /* 88 * Early-exit success is reserved for things which 89 * don't have an exit() function because we have no 90 * idea how far they got or how to partially tear 91 * them down. 92 */ 93 WARN_ON(init_funcs[i].exit); 94 break; 95 } 96 } 97 98 init_progress = i; 99 100 return 0; 101 } 102 103 static void __exit i915_exit(void) 104 { 105 int i; 106 107 for (i = init_progress - 1; i >= 0; i--) { 108 GEM_BUG_ON(i >= ARRAY_SIZE(init_funcs)); 109 if (init_funcs[i].exit) 110 init_funcs[i].exit(); 111 } 112 } 113 114 module_init(i915_init); 115 module_exit(i915_exit); 116 117 MODULE_AUTHOR("Tungsten Graphics, Inc."); 118 MODULE_AUTHOR("Intel Corporation"); 119 120 MODULE_DESCRIPTION(DRIVER_DESC); 121 MODULE_LICENSE("GPL and additional rights"); 122