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

nv04.c (3921B)

      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#define nv04_sw_chan(p) container_of((p), struct nv04_sw_chan, base)
     25#include "priv.h"
     26#include "chan.h"
     27#include "nvsw.h"
     28
     29#include <nvif/class.h>
     30#include <nvif/if0004.h>
     31#include <nvif/ioctl.h>
     32#include <nvif/unpack.h>
     33
     34struct nv04_sw_chan {
     35	struct nvkm_sw_chan base;
     36	atomic_t ref;
     37};
     38
     39/*******************************************************************************
     40 * software object classes
     41 ******************************************************************************/
     42
     43static int
     44nv04_nvsw_mthd_get_ref(struct nvkm_nvsw *nvsw, void *data, u32 size)
     45{
     46	struct nv04_sw_chan *chan = nv04_sw_chan(nvsw->chan);
     47	union {
     48		struct nv04_nvsw_get_ref_v0 v0;
     49	} *args = data;
     50	int ret = -ENOSYS;
     51
     52	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
     53		args->v0.ref = atomic_read(&chan->ref);
     54	}
     55
     56	return ret;
     57}
     58
     59static int
     60nv04_nvsw_mthd(struct nvkm_nvsw *nvsw, u32 mthd, void *data, u32 size)
     61{
     62	switch (mthd) {
     63	case NV04_NVSW_GET_REF:
     64		return nv04_nvsw_mthd_get_ref(nvsw, data, size);
     65	default:
     66		break;
     67	}
     68	return -EINVAL;
     69}
     70
     71static const struct nvkm_nvsw_func
     72nv04_nvsw = {
     73	.mthd = nv04_nvsw_mthd,
     74};
     75
     76static int
     77nv04_nvsw_new(struct nvkm_sw_chan *chan, const struct nvkm_oclass *oclass,
     78	      void *data, u32 size, struct nvkm_object **pobject)
     79{
     80	return nvkm_nvsw_new_(&nv04_nvsw, chan, oclass, data, size, pobject);
     81}
     82
     83/*******************************************************************************
     84 * software context
     85 ******************************************************************************/
     86
     87static bool
     88nv04_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
     89{
     90	struct nv04_sw_chan *chan = nv04_sw_chan(base);
     91
     92	switch (mthd) {
     93	case 0x0150:
     94		atomic_set(&chan->ref, data);
     95		return true;
     96	default:
     97		break;
     98	}
     99
    100	return false;
    101}
    102
    103static const struct nvkm_sw_chan_func
    104nv04_sw_chan = {
    105	.mthd = nv04_sw_chan_mthd,
    106};
    107
    108static int
    109nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifo,
    110		 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
    111{
    112	struct nv04_sw_chan *chan;
    113
    114	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
    115		return -ENOMEM;
    116	atomic_set(&chan->ref, 0);
    117	*pobject = &chan->base.object;
    118
    119	return nvkm_sw_chan_ctor(&nv04_sw_chan, sw, fifo, oclass, &chan->base);
    120}
    121
    122/*******************************************************************************
    123 * software engine/subdev functions
    124 ******************************************************************************/
    125
    126static const struct nvkm_sw_func
    127nv04_sw = {
    128	.chan_new = nv04_sw_chan_new,
    129	.sclass = {
    130		{ nv04_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV04 } },
    131		{}
    132	}
    133};
    134
    135int
    136nv04_sw_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_sw **psw)
    137{
    138	return nvkm_sw_new_(&nv04_sw, device, type, inst, psw);
    139}