cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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memgf100.c (2900B)

      1/*
      2 * Copyright 2017 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#include "mem.h"
     23
     24#include <core/memory.h>
     25#include <subdev/bar.h>
     26#include <subdev/fb.h>
     27
     28#include <nvif/class.h>
     29#include <nvif/if900b.h>
     30#include <nvif/if900d.h>
     31#include <nvif/unpack.h>
     32
     33int
     34gf100_mem_map(struct nvkm_mmu *mmu, struct nvkm_memory *memory, void *argv,
     35	      u32 argc, u64 *paddr, u64 *psize, struct nvkm_vma **pvma)
     36{
     37	struct gf100_vmm_map_v0 uvmm = {};
     38	union {
     39		struct gf100_mem_map_vn vn;
     40		struct gf100_mem_map_v0 v0;
     41	} *args = argv;
     42	struct nvkm_device *device = mmu->subdev.device;
     43	struct nvkm_vmm *bar = nvkm_bar_bar1_vmm(device);
     44	int ret = -ENOSYS;
     45
     46	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
     47		uvmm.ro   = args->v0.ro;
     48		uvmm.kind = args->v0.kind;
     49	} else
     50	if (!(ret = nvif_unvers(ret, &argv, &argc, args->vn))) {
     51	} else
     52		return ret;
     53
     54	ret = nvkm_vmm_get(bar, nvkm_memory_page(memory),
     55				nvkm_memory_size(memory), pvma);
     56	if (ret)
     57		return ret;
     58
     59	ret = nvkm_memory_map(memory, 0, bar, *pvma, &uvmm, sizeof(uvmm));
     60	if (ret)
     61		return ret;
     62
     63	*paddr = device->func->resource_addr(device, 1) + (*pvma)->addr;
     64	*psize = (*pvma)->size;
     65	return 0;
     66}
     67
     68int
     69gf100_mem_new(struct nvkm_mmu *mmu, int type, u8 page, u64 size,
     70	      void *argv, u32 argc, struct nvkm_memory **pmemory)
     71{
     72	union {
     73		struct gf100_mem_vn vn;
     74		struct gf100_mem_v0 v0;
     75	} *args = argv;
     76	int ret = -ENOSYS;
     77	bool contig;
     78
     79	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
     80		contig = args->v0.contig;
     81	} else
     82	if (!(ret = nvif_unvers(ret, &argv, &argc, args->vn))) {
     83		contig = false;
     84	} else
     85		return ret;
     86
     87	if (mmu->type[type].type & (NVKM_MEM_DISP | NVKM_MEM_COMP))
     88		type = NVKM_RAM_MM_NORMAL;
     89	else
     90		type = NVKM_RAM_MM_MIXED;
     91
     92	return nvkm_ram_get(mmu->subdev.device, type, 0x01, page,
     93			    size, contig, false, pmemory);
     94}