src/gallium/drivers/freedreno/a5xx/fd5_resource.c

/*
 * Copyright (C) 2018 Rob Clark <robclark@freedesktop.org>
 *
 * 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 (including the next
 * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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:
 *    Rob Clark <robclark@freedesktop.org>
 */

#include "fd5_resource.h"

static void
setup_lrz(struct fd_resource *rsc)
{
	struct fd_screen *screen = fd_screen(rsc->base.screen);
	const uint32_t flags = DRM_FREEDRENO_GEM_CACHE_WCOMBINE |
			DRM_FREEDRENO_GEM_TYPE_KMEM; /* TODO */
	unsigned lrz_pitch  = align(DIV_ROUND_UP(rsc->base.width0, 8), 64);
	unsigned lrz_height = DIV_ROUND_UP(rsc->base.height0, 8);

	/* LRZ buffer is super-sampled: */
	switch (rsc->base.nr_samples) {
	case 4:
		lrz_pitch *= 2;
		/* fallthrough */
	case 2:
		lrz_height *= 2;
	}

	unsigned size = lrz_pitch * lrz_height * 2;

	size += 0x1000; /* for GRAS_LRZ_FAST_CLEAR_BUFFER */

	rsc->lrz_height = lrz_height;
	rsc->lrz_width = lrz_pitch;
	rsc->lrz_pitch = lrz_pitch;
	rsc->lrz = fd_bo_new(screen->dev, size, flags, "lrz");
}

uint32_t
fd5_setup_slices(struct fd_resource *rsc)
{
	struct pipe_resource *prsc = &rsc->base;

	if ((fd_mesa_debug & FD_DBG_LRZ) && has_depth(rsc->base.format))
		setup_lrz(rsc);

	fdl5_layout(&rsc->layout, prsc->format, fd_resource_nr_samples(prsc),
			prsc->width0, prsc->height0, prsc->depth0,
			prsc->last_level + 1, prsc->array_size,
			prsc->target == PIPE_TEXTURE_3D);

	return rsc->layout.size;
}