/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

/*
 * Copyright (C) 2012 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>
 */

#ifndef FREEDRENO_RESOURCE_H_
#define FREEDRENO_RESOURCE_H_

#include "util/list.h"
#include "util/u_range.h"
#include "util/u_transfer.h"

#include "freedreno_util.h"

/* Texture Layout on a3xx:
 *
 * Each mipmap-level contains all of it's layers (ie. all cubmap
 * faces, all 1d/2d array elements, etc).  The texture sampler is
 * programmed with the start address of each mipmap level, and hw
 * derives the layer offset within the level.
 *
 * Texture Layout on a4xx:
 *
 * For cubemap and 2d array, each layer contains all of it's mipmap
 * levels (layer_first layout).
 *
 * 3d textures are layed out as on a3xx, but unknown about 3d-array
 * textures.
 *
 * In either case, the slice represents the per-miplevel information,
 * but in layer_first layout it only includes the first layer, and
 * an additional offset of (rsc->layer_size * layer) must be added.
 */
struct fd_resource_slice {
	uint32_t offset;         /* offset of first layer in slice */
	uint32_t pitch;
	uint32_t size0;          /* size of first layer in slice */
};

/* status of queued up but not flushed reads and write operations.
 * In _transfer_map() we need to know if queued up rendering needs
 * to be flushed to preserve the order of cpu and gpu access.
 */
enum fd_resource_status {
	FD_PENDING_WRITE = 0x01,
	FD_PENDING_READ  = 0x02,
};

struct fd_resource {
	struct u_resource base;
	struct fd_bo *bo;
	uint32_t cpp;
	bool layer_first;        /* see above description */
	uint32_t layer_size;
	struct fd_resource_slice slices[MAX_MIP_LEVELS];
	uint32_t timestamp;
	/* buffer range that has been initialized */
	struct util_range valid_buffer_range;

	/* reference to the resource holding stencil data for a z32_s8 texture */
	/* TODO rename to secondary or auxiliary? */
	struct fd_resource *stencil;

	/* pending read/write state: */
	enum fd_resource_status status;
	/* resources accessed by queued but not flushed draws are tracked
	 * in the used_resources list.
	 */
	struct list_head list;
	struct fd_context *pending_ctx;
};

static inline struct fd_resource *
fd_resource(struct pipe_resource *ptex)
{
	return (struct fd_resource *)ptex;
}

struct fd_transfer {
	struct pipe_transfer base;
	void *staging;
};

static inline struct fd_transfer *
fd_transfer(struct pipe_transfer *ptrans)
{
	return (struct fd_transfer *)ptrans;
}

static inline struct fd_resource_slice *
fd_resource_slice(struct fd_resource *rsc, unsigned level)
{
	assert(level <= rsc->base.b.last_level);
	return &rsc->slices[level];
}

/* get offset for specified mipmap level and texture/array layer */
static inline uint32_t
fd_resource_offset(struct fd_resource *rsc, unsigned level, unsigned layer)
{
	struct fd_resource_slice *slice = fd_resource_slice(rsc, level);
	unsigned offset;
	if (rsc->layer_first) {
		offset = slice->offset + (rsc->layer_size * layer);
	} else {
		offset = slice->offset + (slice->size0 * layer);
	}
	debug_assert(offset < fd_bo_size(rsc->bo));
	return offset;
}

void fd_resource_screen_init(struct pipe_screen *pscreen);
void fd_resource_context_init(struct pipe_context *pctx);

#endif /* FREEDRENO_RESOURCE_H_ */
