1 /* 2 * Copyright 2012 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs 23 */ 24 #include "priv.h" 25 26 void 27 nvkm_bar_flush(struct nvkm_bar *bar) 28 { 29 if (bar && bar->func->flush) 30 bar->func->flush(bar); 31 } 32 33 struct nvkm_vmm * 34 nvkm_bar_bar1_vmm(struct nvkm_device *device) 35 { 36 return device->bar->func->bar1.vmm(device->bar); 37 } 38 39 void 40 nvkm_bar_bar1_reset(struct nvkm_device *device) 41 { 42 struct nvkm_bar *bar = device->bar; 43 if (bar) { 44 bar->func->bar1.init(bar); 45 bar->func->bar1.wait(bar); 46 } 47 } 48 49 struct nvkm_vmm * 50 nvkm_bar_bar2_vmm(struct nvkm_device *device) 51 { 52 /* Denies access to BAR2 when it's not initialised, used by INSTMEM 53 * to know when object access needs to go through the BAR0 window. 54 */ 55 struct nvkm_bar *bar = device->bar; 56 if (bar && bar->bar2) 57 return bar->func->bar2.vmm(bar); 58 return NULL; 59 } 60 61 void 62 nvkm_bar_bar2_reset(struct nvkm_device *device) 63 { 64 struct nvkm_bar *bar = device->bar; 65 if (bar && bar->bar2) { 66 bar->func->bar2.init(bar); 67 bar->func->bar2.wait(bar); 68 } 69 } 70 71 void 72 nvkm_bar_bar2_fini(struct nvkm_device *device) 73 { 74 struct nvkm_bar *bar = device->bar; 75 if (bar && bar->bar2) { 76 bar->func->bar2.fini(bar); 77 bar->bar2 = false; 78 } 79 } 80 81 void 82 nvkm_bar_bar2_init(struct nvkm_device *device) 83 { 84 struct nvkm_bar *bar = device->bar; 85 if (bar && bar->subdev.oneinit && !bar->bar2 && bar->func->bar2.init) { 86 bar->func->bar2.init(bar); 87 bar->func->bar2.wait(bar); 88 bar->bar2 = true; 89 } 90 } 91 92 static int 93 nvkm_bar_fini(struct nvkm_subdev *subdev, bool suspend) 94 { 95 struct nvkm_bar *bar = nvkm_bar(subdev); 96 if (bar->func->bar1.fini) 97 bar->func->bar1.fini(bar); 98 return 0; 99 } 100 101 static int 102 nvkm_bar_init(struct nvkm_subdev *subdev) 103 { 104 struct nvkm_bar *bar = nvkm_bar(subdev); 105 bar->func->bar1.init(bar); 106 bar->func->bar1.wait(bar); 107 if (bar->func->init) 108 bar->func->init(bar); 109 return 0; 110 } 111 112 static int 113 nvkm_bar_oneinit(struct nvkm_subdev *subdev) 114 { 115 struct nvkm_bar *bar = nvkm_bar(subdev); 116 return bar->func->oneinit(bar); 117 } 118 119 static void * 120 nvkm_bar_dtor(struct nvkm_subdev *subdev) 121 { 122 struct nvkm_bar *bar = nvkm_bar(subdev); 123 nvkm_bar_bar2_fini(subdev->device); 124 return bar->func->dtor(bar); 125 } 126 127 static const struct nvkm_subdev_func 128 nvkm_bar = { 129 .dtor = nvkm_bar_dtor, 130 .oneinit = nvkm_bar_oneinit, 131 .init = nvkm_bar_init, 132 .fini = nvkm_bar_fini, 133 }; 134 135 void 136 nvkm_bar_ctor(const struct nvkm_bar_func *func, struct nvkm_device *device, 137 int index, struct nvkm_bar *bar) 138 { 139 nvkm_subdev_ctor(&nvkm_bar, device, index, &bar->subdev); 140 bar->func = func; 141 spin_lock_init(&bar->lock); 142 } 143