mmu.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/mmu.h>
 23
 24#include <nvif/class.h>
 25#include <nvif/if0008.h>
 26
 27void
 28nvif_mmu_dtor(struct nvif_mmu *mmu)
 29{
 30	if (!nvif_object_constructed(&mmu->object))
 31		return;
 32
 33	kfree(mmu->kind);
 34	kfree(mmu->type);
 35	kfree(mmu->heap);
 36	nvif_object_dtor(&mmu->object);
 37}
 38
 39int
 40nvif_mmu_ctor(struct nvif_object *parent, const char *name, s32 oclass,
 41	      struct nvif_mmu *mmu)
 42{
 43	static const struct nvif_mclass mems[] = {
 44		{ NVIF_CLASS_MEM_GF100, -1 },
 45		{ NVIF_CLASS_MEM_NV50 , -1 },
 46		{ NVIF_CLASS_MEM_NV04 , -1 },
 47		{}
 48	};
 49	struct nvif_mmu_v0 args;
 50	int ret, i;
 51
 52	args.version = 0;
 53	mmu->heap = NULL;
 54	mmu->type = NULL;
 55	mmu->kind = NULL;
 56
 57	ret = nvif_object_ctor(parent, name ? name : "nvifMmu", 0, oclass,
 58			       &args, sizeof(args), &mmu->object);
 59	if (ret)
 60		goto done;
 61
 62	mmu->dmabits = args.dmabits;
 63	mmu->heap_nr = args.heap_nr;
 64	mmu->type_nr = args.type_nr;
 65	mmu->kind_nr = args.kind_nr;
 66
 67	ret = nvif_mclass(&mmu->object, mems);
 68	if (ret < 0)
 69		goto done;
 70	mmu->mem = mems[ret].oclass;
 71
 72	mmu->heap = kmalloc_array(mmu->heap_nr, sizeof(*mmu->heap),
 73				  GFP_KERNEL);
 74	mmu->type = kmalloc_array(mmu->type_nr, sizeof(*mmu->type),
 75				  GFP_KERNEL);
 76	if (ret = -ENOMEM, !mmu->heap || !mmu->type)
 77		goto done;
 78
 79	mmu->kind = kmalloc_array(mmu->kind_nr, sizeof(*mmu->kind),
 80				  GFP_KERNEL);
 81	if (!mmu->kind && mmu->kind_nr)
 82		goto done;
 83
 84	for (i = 0; i < mmu->heap_nr; i++) {
 85		struct nvif_mmu_heap_v0 args = { .index = i };
 86
 87		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
 88				       &args, sizeof(args));
 89		if (ret)
 90			goto done;
 91
 92		mmu->heap[i].size = args.size;
 93	}
 94
 95	for (i = 0; i < mmu->type_nr; i++) {
 96		struct nvif_mmu_type_v0 args = { .index = i };
 97
 98		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
 99				       &args, sizeof(args));
100		if (ret)
101			goto done;
102
103		mmu->type[i].type = 0;
104		if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
105		if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
106		if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
107		if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
108		if (args.kind    ) mmu->type[i].type |= NVIF_MEM_KIND;
109		if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
110		if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
111		if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
112		mmu->type[i].heap = args.heap;
113	}
114
115	if (mmu->kind_nr) {
116		struct nvif_mmu_kind_v0 *kind;
117		size_t argc = struct_size(kind, data, mmu->kind_nr);
118
119		if (ret = -ENOMEM, !(kind = kmalloc(argc, GFP_KERNEL)))
120			goto done;
121		kind->version = 0;
122		kind->count = mmu->kind_nr;
123
124		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_KIND,
125				       kind, argc);
126		if (ret == 0)
127			memcpy(mmu->kind, kind->data, kind->count);
128		mmu->kind_inv = kind->kind_inv;
129		kfree(kind);
130	}
131
132done:
133	if (ret)
134		nvif_mmu_dtor(mmu);
135	return ret;
136}