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

mem.c (2873B)

      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 <nvif/mem.h>
     23#include <nvif/client.h>
     24
     25#include <nvif/if000a.h>
     26
     27int
     28nvif_mem_ctor_map(struct nvif_mmu *mmu, const char *name, u8 type, u64 size,
     29		  struct nvif_mem *mem)
     30{
     31	int ret = nvif_mem_ctor(mmu, name, mmu->mem, NVIF_MEM_MAPPABLE | type,
     32				0, size, NULL, 0, mem);
     33	if (ret == 0) {
     34		ret = nvif_object_map(&mem->object, NULL, 0);
     35		if (ret)
     36			nvif_mem_dtor(mem);
     37	}
     38	return ret;
     39}
     40
     41void
     42nvif_mem_dtor(struct nvif_mem *mem)
     43{
     44	nvif_object_dtor(&mem->object);
     45}
     46
     47int
     48nvif_mem_ctor_type(struct nvif_mmu *mmu, const char *name, s32 oclass,
     49		   int type, u8 page, u64 size, void *argv, u32 argc,
     50		   struct nvif_mem *mem)
     51{
     52	struct nvif_mem_v0 *args;
     53	u8 stack[128];
     54	int ret;
     55
     56	mem->object.client = NULL;
     57	if (type < 0)
     58		return -EINVAL;
     59
     60	if (sizeof(*args) + argc > sizeof(stack)) {
     61		if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL)))
     62			return -ENOMEM;
     63	} else {
     64		args = (void *)stack;
     65	}
     66	args->version = 0;
     67	args->type = type;
     68	args->page = page;
     69	args->size = size;
     70	memcpy(args->data, argv, argc);
     71
     72	ret = nvif_object_ctor(&mmu->object, name ? name : "nvifMem", 0, oclass,
     73			       args, sizeof(*args) + argc, &mem->object);
     74	if (ret == 0) {
     75		mem->type = mmu->type[type].type;
     76		mem->page = args->page;
     77		mem->addr = args->addr;
     78		mem->size = args->size;
     79	}
     80
     81	if (args != (void *)stack)
     82		kfree(args);
     83	return ret;
     84
     85}
     86
     87int
     88nvif_mem_ctor(struct nvif_mmu *mmu, const char *name, s32 oclass, u8 type,
     89	      u8 page, u64 size, void *argv, u32 argc, struct nvif_mem *mem)
     90{
     91	int ret = -EINVAL, i;
     92
     93	mem->object.client = NULL;
     94
     95	for (i = 0; ret && i < mmu->type_nr; i++) {
     96		if ((mmu->type[i].type & type) == type) {
     97			ret = nvif_mem_ctor_type(mmu, name, oclass, i, page,
     98						 size, argv, argc, mem);
     99		}
    100	}
    101
    102	return ret;
    103}