mem.c

  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}