cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

base.c (3593B)

      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	      enum nvkm_subdev_type type, int inst, struct nvkm_bar *bar)
    138{
    139	nvkm_subdev_ctor(&nvkm_bar, device, type, inst, &bar->subdev);
    140	bar->func = func;
    141	spin_lock_init(&bar->lock);
    142}