LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/bar/base.c

   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
  26void
  27nvkm_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
  39void
  40nvkm_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 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
  61void
  62nvkm_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
  71void
  72nvkm_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
  81void
  82nvkm_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 int
  93nvkm_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
 101static int
 102nvkm_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
 112static int
 113nvkm_bar_oneinit(struct nvkm_subdev *subdev)
 114{
 115        struct nvkm_bar *bar = nvkm_bar(subdev);
 116        return bar->func->oneinit(bar);
 117}
 118
 119static void *
 120nvkm_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
 127static const struct nvkm_subdev_func
 128nvkm_bar = {
 129        .dtor = nvkm_bar_dtor,
 130        .oneinit = nvkm_bar_oneinit,
 131        .init = nvkm_bar_init,
 132        .fini = nvkm_bar_fini,
 133};
 134
 135void
 136nvkm_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