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
  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 }