drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv50.c

/*
 * Copyright 2010 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */
#include "mem.h"
#include "vmm.h"

#include <nvif/class.h>

const u8 *
nv50_mmu_kind(struct nvkm_mmu *base, int *count, u8 *invalid)
{
	/* 0x01: no bank swizzle
	 * 0x02: bank swizzled
	 * 0x7f: invalid
	 *
	 * 0x01/0x02 are values understood by the VRAM allocator,
	 * and are required to avoid mixing the two types within
	 * a certain range.
	 */
	static const u8
	kind[128] = {
		0x01, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, /* 0x00 */
		0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
		0x01, 0x01, 0x01, 0x01, 0x7f, 0x7f, 0x7f, 0x7f, /* 0x10 */
		0x02, 0x02, 0x02, 0x02, 0x7f, 0x7f, 0x7f, 0x7f,
		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f, /* 0x20 */
		0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x7f,
		0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, /* 0x30 */
		0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, /* 0x40 */
		0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x7f, 0x7f,
		0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x01, 0x01, 0x7f, /* 0x50 */
		0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f, /* 0x60 */
		0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
		0x01, 0x7f, 0x02, 0x7f, 0x01, 0x7f, 0x02, 0x7f, /* 0x70 */
		0x01, 0x01, 0x02, 0x02, 0x01, 0x01, 0x7f, 0x7f
	};
	*count = ARRAY_SIZE(kind);
	*invalid = 0x7f;
	return kind;
}

static const struct nvkm_mmu_func
nv50_mmu = {
	.dma_bits = 40,
	.mmu = {{ -1, -1, NVIF_CLASS_MMU_NV50}},
	.mem = {{ -1,  0, NVIF_CLASS_MEM_NV50}, nv50_mem_new, nv50_mem_map },
	.vmm = {{ -1, -1, NVIF_CLASS_VMM_NV50}, nv50_vmm_new, false, 0x1400 },
	.kind = nv50_mmu_kind,
};

int
nv50_mmu_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
	     struct nvkm_mmu **pmmu)
{
	return nvkm_mmu_new_(&nv50_mmu, device, type, inst, pmmu);
}