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

nouveau_nvif.c (3242B)

      1/*
      2 * Copyright 2014 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 <bskeggs@redhat.com>
     23 */
     24
     25/*******************************************************************************
     26 * NVIF client driver - NVKM directly linked
     27 ******************************************************************************/
     28
     29#include <core/client.h>
     30#include <core/notify.h>
     31#include <core/ioctl.h>
     32
     33#include <nvif/client.h>
     34#include <nvif/driver.h>
     35#include <nvif/notify.h>
     36#include <nvif/event.h>
     37#include <nvif/ioctl.h>
     38
     39#include "nouveau_drv.h"
     40#include "nouveau_usif.h"
     41
     42static void
     43nvkm_client_unmap(void *priv, void __iomem *ptr, u32 size)
     44{
     45	iounmap(ptr);
     46}
     47
     48static void __iomem *
     49nvkm_client_map(void *priv, u64 handle, u32 size)
     50{
     51	return ioremap(handle, size);
     52}
     53
     54static int
     55nvkm_client_ioctl(void *priv, void *data, u32 size, void **hack)
     56{
     57	return nvkm_ioctl(priv, data, size, hack);
     58}
     59
     60static int
     61nvkm_client_resume(void *priv)
     62{
     63	struct nvkm_client *client = priv;
     64	return nvkm_object_init(&client->object);
     65}
     66
     67static int
     68nvkm_client_suspend(void *priv)
     69{
     70	struct nvkm_client *client = priv;
     71	return nvkm_object_fini(&client->object, true);
     72}
     73
     74static int
     75nvkm_client_ntfy(const void *header, u32 length, const void *data, u32 size)
     76{
     77	const union {
     78		struct nvif_notify_req_v0 v0;
     79	} *args = header;
     80	u8 route;
     81
     82	if (length == sizeof(args->v0) && args->v0.version == 0) {
     83		route = args->v0.route;
     84	} else {
     85		WARN_ON(1);
     86		return NVKM_NOTIFY_DROP;
     87	}
     88
     89	switch (route) {
     90	case NVDRM_NOTIFY_NVIF:
     91		return nvif_notify(header, length, data, size);
     92	case NVDRM_NOTIFY_USIF:
     93		return usif_notify(header, length, data, size);
     94	default:
     95		WARN_ON(1);
     96		break;
     97	}
     98
     99	return NVKM_NOTIFY_DROP;
    100}
    101
    102static int
    103nvkm_client_driver_init(const char *name, u64 device, const char *cfg,
    104			const char *dbg, void **ppriv)
    105{
    106	return nvkm_client_new(name, device, cfg, dbg, nvkm_client_ntfy,
    107			       (struct nvkm_client **)ppriv);
    108}
    109
    110const struct nvif_driver
    111nvif_driver_nvkm = {
    112	.name = "nvkm",
    113	.init = nvkm_client_driver_init,
    114	.suspend = nvkm_client_suspend,
    115	.resume = nvkm_client_resume,
    116	.ioctl = nvkm_client_ioctl,
    117	.map = nvkm_client_map,
    118	.unmap = nvkm_client_unmap,
    119	.keep = false,
    120};