151 lines · c
1/*2 * Copyright 2012 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 */24#include "priv.h"25 26void27nvkm_bar_flush(struct nvkm_bar *bar)28{29 if (bar && bar->func->flush)30 bar->func->flush(bar);31}32 33struct nvkm_vmm *34nvkm_bar_bar1_vmm(struct nvkm_device *device)35{36 return device->bar->func->bar1.vmm(device->bar);37}38 39void40nvkm_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 49struct nvkm_vmm *50nvkm_bar_bar2_vmm(struct nvkm_device *device)51{52 /* Denies access to BAR2 when it's not initialised, used by INSTMEM53 * 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 61void62nvkm_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 71void72nvkm_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 81void82nvkm_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 92static int93nvkm_bar_fini(struct nvkm_subdev *subdev, bool suspend)94{95 struct nvkm_bar *bar = nvkm_bar(subdev);96 97 if (!subdev->use.enabled)98 return 0;99 100 if (bar->func->bar1.fini)101 bar->func->bar1.fini(bar);102 103 if (!suspend) /* Handled by instmem. */104 nvkm_bar_bar2_fini(subdev->device);105 106 return 0;107}108 109static int110nvkm_bar_init(struct nvkm_subdev *subdev)111{112 struct nvkm_bar *bar = nvkm_bar(subdev);113 bar->func->bar1.init(bar);114 bar->func->bar1.wait(bar);115 if (bar->func->init)116 bar->func->init(bar);117 return 0;118}119 120static int121nvkm_bar_oneinit(struct nvkm_subdev *subdev)122{123 struct nvkm_bar *bar = nvkm_bar(subdev);124 return bar->func->oneinit(bar);125}126 127static void *128nvkm_bar_dtor(struct nvkm_subdev *subdev)129{130 struct nvkm_bar *bar = nvkm_bar(subdev);131 132 return bar->func->dtor(bar);133}134 135static const struct nvkm_subdev_func136nvkm_bar = {137 .dtor = nvkm_bar_dtor,138 .oneinit = nvkm_bar_oneinit,139 .init = nvkm_bar_init,140 .fini = nvkm_bar_fini,141};142 143void144nvkm_bar_ctor(const struct nvkm_bar_func *func, struct nvkm_device *device,145 enum nvkm_subdev_type type, int inst, struct nvkm_bar *bar)146{147 nvkm_subdev_ctor(&nvkm_bar, device, type, inst, &bar->subdev);148 bar->func = func;149 spin_lock_init(&bar->lock);150}151