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
  39struct nvkm_vmm *
  40nvkm_bar_bar2_vmm(struct nvkm_device *device)
  41{
  42        /* Denies access to BAR2 when it's not initialised, used by INSTMEM
  43         * to know when object access needs to go through the BAR0 window.
  44         */
  45        struct nvkm_bar *bar = device->bar;
  46        if (bar && bar->bar2)
  47                return bar->func->bar2.vmm(bar);
  48        return NULL;
  49}
  50
  51void
  52nvkm_bar_bar2_fini(struct nvkm_device *device)
  53{
  54        struct nvkm_bar *bar = device->bar;
  55        if (bar && bar->bar2) {
  56                bar->func->bar2.fini(bar);
  57                bar->bar2 = false;
  58        }
  59}
  60
  61void
  62nvkm_bar_bar2_init(struct nvkm_device *device)
  63{
  64        struct nvkm_bar *bar = device->bar;
  65        if (bar && bar->subdev.oneinit && !bar->bar2 && bar->func->bar2.init) {
  66                bar->func->bar2.init(bar);
  67                bar->func->bar2.wait(bar);
  68                bar->bar2 = true;
  69        }
  70}
  71
  72static int
  73nvkm_bar_fini(struct nvkm_subdev *subdev, bool suspend)
  74{
  75        struct nvkm_bar *bar = nvkm_bar(subdev);
  76        if (bar->func->bar1.fini)
  77                bar->func->bar1.fini(bar);
  78        return 0;
  79}
  80
  81static int
  82nvkm_bar_init(struct nvkm_subdev *subdev)
  83{
  84        struct nvkm_bar *bar = nvkm_bar(subdev);
  85        bar->func->bar1.init(bar);
  86        bar->func->bar1.wait(bar);
  87        if (bar->func->init)
  88                bar->func->init(bar);
  89        return 0;
  90}
  91
  92static int
  93nvkm_bar_oneinit(struct nvkm_subdev *subdev)
  94{
  95        struct nvkm_bar *bar = nvkm_bar(subdev);
  96        return bar->func->oneinit(bar);
  97}
  98
  99static void *
 100nvkm_bar_dtor(struct nvkm_subdev *subdev)
 101{
 102        struct nvkm_bar *bar = nvkm_bar(subdev);
 103        nvkm_bar_bar2_fini(subdev->device);
 104        return bar->func->dtor(bar);
 105}
 106
 107static const struct nvkm_subdev_func
 108nvkm_bar = {
 109        .dtor = nvkm_bar_dtor,
 110        .oneinit = nvkm_bar_oneinit,
 111        .init = nvkm_bar_init,
 112        .fini = nvkm_bar_fini,
 113};
 114
 115void
 116nvkm_bar_ctor(const struct nvkm_bar_func *func, struct nvkm_device *device,
 117              int index, struct nvkm_bar *bar)
 118{
 119        nvkm_subdev_ctor(&nvkm_bar, device, index, &bar->subdev);
 120        bar->func = func;
 121        spin_lock_init(&bar->lock);
 122}
 123