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, enum nvkm_suspend_state 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 int
110nvkm_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 int
121nvkm_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_func
136nvkm_bar = {
137	.dtor = nvkm_bar_dtor,
138	.oneinit = nvkm_bar_oneinit,
139	.init = nvkm_bar_init,
140	.fini = nvkm_bar_fini,
141};
142
143void
144nvkm_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}