/*
 * Copyright 2012 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 "subdev/fb.h"
#include "subdev/bios.h"
#include "subdev/bios/bit.h"

int
nouveau_fb_bios_memtype(struct nouveau_bios *bios)
{
	struct bit_entry M;
	u8 ramcfg;

	ramcfg = (nv_rd32(bios, 0x101000) & 0x0000003c) >> 2;
	if (!bit_entry(bios, 'M', &M) && M.version == 2 && M.length >= 5) {
		u16 table   = nv_ro16(bios, M.offset + 3);
		u8  version = nv_ro08(bios, table + 0);
		u8  header  = nv_ro08(bios, table + 1);
		u8  record  = nv_ro08(bios, table + 2);
		u8  entries = nv_ro08(bios, table + 3);
		if (table && version == 0x10 && ramcfg < entries) {
			u16 entry = table + header + (ramcfg * record);
			switch (nv_ro08(bios, entry) & 0x0f) {
			case 0: return NV_MEM_TYPE_DDR2;
			case 1: return NV_MEM_TYPE_DDR3;
			case 2: return NV_MEM_TYPE_GDDR3;
			case 3: return NV_MEM_TYPE_GDDR5;
			default:
				break;
			}

		}
	}

	return NV_MEM_TYPE_UNKNOWN;
}

int
_nouveau_fb_fini(struct nouveau_object *object, bool suspend)
{
	struct nouveau_fb *pfb = (void *)object;
	int ret;

	ret = nv_ofuncs(pfb->ram)->fini(nv_object(pfb->ram), suspend);
	if (ret && suspend)
		return ret;

	return nouveau_subdev_fini(&pfb->base, suspend);
}

int
_nouveau_fb_init(struct nouveau_object *object)
{
	struct nouveau_fb *pfb = (void *)object;
	int ret, i;

	ret = nouveau_subdev_init(&pfb->base);
	if (ret)
		return ret;

	ret = nv_ofuncs(pfb->ram)->init(nv_object(pfb->ram));
	if (ret)
		return ret;

	for (i = 0; i < pfb->tile.regions; i++)
		pfb->tile.prog(pfb, i, &pfb->tile.region[i]);

	return 0;
}

void
_nouveau_fb_dtor(struct nouveau_object *object)
{
	struct nouveau_fb *pfb = (void *)object;
	int i;

	for (i = 0; i < pfb->tile.regions; i++)
		pfb->tile.fini(pfb, i, &pfb->tile.region[i]);
	nouveau_mm_fini(&pfb->tags);
	nouveau_mm_fini(&pfb->vram);

	nouveau_object_ref(NULL, (struct nouveau_object **)&pfb->ram);
	nouveau_subdev_destroy(&pfb->base);
}

int
nouveau_fb_create_(struct nouveau_object *parent, struct nouveau_object *engine,
		   struct nouveau_oclass *oclass, struct nouveau_oclass *ramcls,
		   int length, void **pobject)
{
	static const char *name[] = {
		[NV_MEM_TYPE_UNKNOWN] = "unknown",
		[NV_MEM_TYPE_STOLEN ] = "stolen system memory",
		[NV_MEM_TYPE_SGRAM  ] = "SGRAM",
		[NV_MEM_TYPE_SDRAM  ] = "SDRAM",
		[NV_MEM_TYPE_DDR1   ] = "DDR1",
		[NV_MEM_TYPE_DDR2   ] = "DDR2",
		[NV_MEM_TYPE_DDR3   ] = "DDR3",
		[NV_MEM_TYPE_GDDR2  ] = "GDDR2",
		[NV_MEM_TYPE_GDDR3  ] = "GDDR3",
		[NV_MEM_TYPE_GDDR4  ] = "GDDR4",
		[NV_MEM_TYPE_GDDR5  ] = "GDDR5",
	};
	struct nouveau_object *ram;
	struct nouveau_fb *pfb;
	int ret;

	ret = nouveau_subdev_create_(parent, engine, oclass, 0, "PFB", "fb",
				     length, pobject);
	pfb = *pobject;
	if (ret)
		return ret;

	ret = nouveau_object_ctor(nv_object(pfb), nv_object(pfb),
				  ramcls, NULL, 0, &ram);
	if (ret) {
		nv_fatal(pfb, "error detecting memory configuration!!\n");
		return ret;
	}

	atomic_dec(&ram->parent->refcount);
	atomic_dec(&ram->engine->refcount);
	pfb->ram = (void *)ram;

	if (!nouveau_mm_initialised(&pfb->vram)) {
		ret = nouveau_mm_init(&pfb->vram, 0, pfb->ram->size >> 12, 1);
		if (ret)
			return ret;
	}

	if (!nouveau_mm_initialised(&pfb->tags)) {
		ret = nouveau_mm_init(&pfb->tags, 0, pfb->ram->tags ?
				     ++pfb->ram->tags : 0, 1);
		if (ret)
			return ret;
	}

	nv_info(pfb, "RAM type: %s\n", name[pfb->ram->type]);
	nv_info(pfb, "RAM size: %d MiB\n", (int)(pfb->ram->size >> 20));
	nv_info(pfb, "   ZCOMP: %d tags\n", pfb->ram->tags);
	return 0;
}