drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c

/*
 * Copyright 2014 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 <bskeggs@redhat.com>
 */
#include "priv.h"

static int
nvkm_ltc_tags_alloc(struct nvkm_ltc *ltc, u32 n, struct nvkm_mm_node **pnode)
{
	struct nvkm_ltc_priv *priv = (void *)ltc;
	int ret;

	ret = nvkm_mm_head(&priv->tags, 0, 1, n, n, 1, pnode);
	if (ret)
		*pnode = NULL;

	return ret;
}

static void
nvkm_ltc_tags_free(struct nvkm_ltc *ltc, struct nvkm_mm_node **pnode)
{
	struct nvkm_ltc_priv *priv = (void *)ltc;
	nvkm_mm_free(&priv->tags, pnode);
}

static void
nvkm_ltc_tags_clear(struct nvkm_ltc *ltc, u32 first, u32 count)
{
	const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
	struct nvkm_ltc_priv *priv = (void *)ltc;
	const u32 limit = first + count - 1;

	BUG_ON((first > limit) || (limit >= priv->num_tags));

	impl->cbc_clear(priv, first, limit);
	impl->cbc_wait(priv);
}

static int
nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
{
	const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
	struct nvkm_ltc_priv *priv = (void *)ltc;
	memcpy(priv->zbc_color[index], color, sizeof(priv->zbc_color[index]));
	impl->zbc_clear_color(priv, index, color);
	return index;
}

static int
nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
{
	const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
	struct nvkm_ltc_priv *priv = (void *)ltc;
	priv->zbc_depth[index] = depth;
	impl->zbc_clear_depth(priv, index, depth);
	return index;
}

int
_nvkm_ltc_init(struct nvkm_object *object)
{
	const struct nvkm_ltc_impl *impl = (void *)nv_oclass(object);
	struct nvkm_ltc_priv *priv = (void *)object;
	int ret, i;

	ret = nvkm_subdev_init(&priv->base.base);
	if (ret)
		return ret;

	for (i = priv->base.zbc_min; i <= priv->base.zbc_max; i++) {
		impl->zbc_clear_color(priv, i, priv->zbc_color[i]);
		impl->zbc_clear_depth(priv, i, priv->zbc_depth[i]);
	}

	return 0;
}

int
nvkm_ltc_create_(struct nvkm_object *parent, struct nvkm_object *engine,
		 struct nvkm_oclass *oclass, int length, void **pobject)
{
	const struct nvkm_ltc_impl *impl = (void *)oclass;
	struct nvkm_ltc_priv *priv;
	int ret;

	ret = nvkm_subdev_create_(parent, engine, oclass, 0, "PLTCG",
				  "l2c", length, pobject);
	priv = *pobject;
	if (ret)
		return ret;

	memset(priv->zbc_color, 0x00, sizeof(priv->zbc_color));
	memset(priv->zbc_depth, 0x00, sizeof(priv->zbc_depth));

	priv->base.base.intr = impl->intr;
	priv->base.tags_alloc = nvkm_ltc_tags_alloc;
	priv->base.tags_free = nvkm_ltc_tags_free;
	priv->base.tags_clear = nvkm_ltc_tags_clear;
	priv->base.zbc_min = 1; /* reserve 0 for disabled */
	priv->base.zbc_max = min(impl->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
	priv->base.zbc_color_get = nvkm_ltc_zbc_color_get;
	priv->base.zbc_depth_get = nvkm_ltc_zbc_depth_get;
	return 0;
}