/*
 * Copyright 2010 Jerome Glisse <glisse@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
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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:
 *      Jerome Glisse
 */
#ifndef RADEONSI_PIPE_H
#define RADEONSI_PIPE_H

#include "../../winsys/radeon/drm/radeon_winsys.h"

#include "pipe/p_state.h"
#include "pipe/p_screen.h"
#include "pipe/p_context.h"
#include "util/u_format.h"
#include "util/u_math.h"
#include "util/u_slab.h"
#include "r600.h"
#include "radeonsi_public.h"
#include "radeonsi_pm4.h"
#include "si_state.h"
#include "r600_resource.h"
#include "sid.h"

#define R600_MAX_CONST_BUFFERS 1
#define R600_MAX_CONST_BUFFER_SIZE 4096

#ifdef PIPE_ARCH_BIG_ENDIAN
#define R600_BIG_ENDIAN 1
#else
#define R600_BIG_ENDIAN 0
#endif

enum r600_atom_flags {
	/* When set, atoms are added at the beginning of the dirty list
	 * instead of the end. */
	EMIT_EARLY = (1 << 0)
};

/* This encapsulates a state or an operation which can emitted into the GPU
 * command stream. It's not limited to states only, it can be used for anything
 * that wants to write commands into the CS (e.g. cache flushes). */
struct r600_atom {
	void (*emit)(struct r600_context *ctx, struct r600_atom *state);

	unsigned		num_dw;
	enum r600_atom_flags	flags;
	bool			dirty;

	struct list_head	head;
};

struct r600_atom_surface_sync {
	struct r600_atom atom;
	unsigned flush_flags; /* CP_COHER_CNTL */
};

struct r600_pipe_fences {
	struct r600_resource		*bo;
	unsigned			*data;
	unsigned			next_index;
	/* linked list of preallocated blocks */
	struct list_head		blocks;
	/* linked list of freed fences */
	struct list_head		pool;
	pipe_mutex			mutex;
};

struct r600_screen {
	struct pipe_screen		screen;
	struct radeon_winsys		*ws;
	unsigned			family;
	enum chip_class			chip_class;
	struct radeon_info		info;
	struct r600_tiling_info		tiling_info;
	struct util_slab_mempool	pool_buffers;
	struct r600_pipe_fences		fences;
};

struct si_pipe_sampler_view {
	struct pipe_sampler_view	base;
	uint32_t			state[8];
};

struct si_pipe_sampler_state {
	uint32_t			val[4];
};

/* needed for blitter save */
#define NUM_TEX_UNITS 16

struct r600_textures_info {
	struct si_pipe_sampler_view	*views[NUM_TEX_UNITS];
	struct si_pipe_sampler_state	*samplers[NUM_TEX_UNITS];
	unsigned			n_views;
	unsigned			n_samplers;
	bool				samplers_dirty;
	bool				is_array_sampler[NUM_TEX_UNITS];
};

struct r600_fence {
	struct pipe_reference		reference;
	unsigned			index; /* in the shared bo */
	struct r600_resource            *sleep_bo;
	struct list_head		head;
};

#define FENCE_BLOCK_SIZE 16

struct r600_fence_block {
	struct r600_fence		fences[FENCE_BLOCK_SIZE];
	struct list_head		head;
};

#define R600_CONSTANT_ARRAY_SIZE 256
#define R600_RESOURCE_ARRAY_SIZE 160

struct r600_context {
	struct pipe_context		context;
	struct blitter_context		*blitter;
	enum radeon_family		family;
	enum chip_class			chip_class;
	void				*custom_dsa_flush;
	struct r600_screen		*screen;
	struct radeon_winsys		*ws;
	struct si_vertex_element	*vertex_elements;
	struct pipe_framebuffer_state	framebuffer;
	unsigned			pa_sc_line_stipple;
	unsigned			pa_su_sc_mode_cntl;
	unsigned			pa_cl_clip_cntl;
	unsigned			pa_cl_vs_out_cntl;
	/* for saving when using blitter */
	struct pipe_stencil_ref		stencil_ref;
	struct si_pipe_shader		*ps_shader;
	struct si_pipe_shader		*vs_shader;
	struct pipe_query		*current_render_cond;
	unsigned			current_render_cond_mode;
	struct pipe_query		*saved_render_cond;
	unsigned			saved_render_cond_mode;
	/* shader information */
	unsigned			sprite_coord_enable;
	boolean				export_16bpc;
	unsigned			alpha_ref;
	boolean				alpha_ref_dirty;
	struct r600_textures_info	vs_samplers;
	struct r600_textures_info	ps_samplers;
	boolean				shader_dirty;

	struct u_upload_mgr	        *uploader;
	struct util_slab_mempool	pool_transfers;
	boolean				have_depth_texture, have_depth_fb;

	unsigned default_ps_gprs, default_vs_gprs;

	/* States based on r600_state. */
	struct list_head		dirty_states;
	struct r600_atom_surface_sync	atom_surface_sync;
	struct r600_atom		atom_r6xx_flush_and_inv;

	/* Below are variables from the old r600_context.
	 */
	struct radeon_winsys_cs	*cs;

	unsigned		pm4_dirty_cdwords;
	unsigned		init_dwords;

	/* The list of active queries. Only one query of each type can be active. */
	struct list_head	active_query_list;
	unsigned		num_cs_dw_queries_suspend;
	unsigned		num_cs_dw_streamout_end;

	unsigned		backend_mask;
	unsigned                max_db; /* for OQ */
	unsigned		flags;
	boolean                 predicate_drawing;

	unsigned		num_so_targets;
	struct r600_so_target	*so_targets[PIPE_MAX_SO_BUFFERS];
	boolean			streamout_start;
	unsigned		streamout_append_bitmask;
	unsigned		*vs_so_stride_in_dw;
	unsigned		*vs_shader_so_strides;

	/* Vertex and index buffers. */
	bool			vertex_buffers_dirty;
	struct pipe_index_buffer index_buffer;
	struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
	unsigned		nr_vertex_buffers;

	/* SI state handling */
	union si_state	queued;
	union si_state	emitted;
};

static INLINE void r600_emit_atom(struct r600_context *rctx, struct r600_atom *atom)
{
	atom->emit(rctx, atom);
	atom->dirty = false;
	if (atom->head.next && atom->head.prev)
		LIST_DELINIT(&atom->head);
}

static INLINE void r600_atom_dirty(struct r600_context *rctx, struct r600_atom *state)
{
	if (!state->dirty) {
		if (state->flags & EMIT_EARLY) {
			LIST_ADD(&state->head, &rctx->dirty_states);
		} else {
			LIST_ADDTAIL(&state->head, &rctx->dirty_states);
		}
		state->dirty = true;
	}
}

/* r600_blit.c */
void r600_init_blit_functions(struct r600_context *rctx);
void r600_blit_uncompress_depth(struct pipe_context *ctx, struct r600_resource_texture *texture);
void r600_blit_push_depth(struct pipe_context *ctx, struct r600_resource_texture *texture);
void r600_flush_depth_textures(struct r600_context *rctx);

/* r600_buffer.c */
bool r600_init_resource(struct r600_screen *rscreen,
			struct r600_resource *res,
			unsigned size, unsigned alignment,
			unsigned bind, unsigned usage);
struct pipe_resource *r600_buffer_create(struct pipe_screen *screen,
					 const struct pipe_resource *templ);
void r600_upload_index_buffer(struct r600_context *rctx,
			      struct pipe_index_buffer *ib, unsigned count);


/* r600_pipe.c */
void radeonsi_flush(struct pipe_context *ctx, struct pipe_fence_handle **fence,
		    unsigned flags);

/* r600_query.c */
void r600_init_query_functions(struct r600_context *rctx);

/* r600_resource.c */
void r600_init_context_resource_functions(struct r600_context *r600);

/* radeonsi_shader.c */
int si_pipe_shader_create(struct pipe_context *ctx, struct si_pipe_shader *shader);
void si_pipe_shader_destroy(struct pipe_context *ctx, struct si_pipe_shader *shader);

/* r600_texture.c */
void r600_init_screen_texture_functions(struct pipe_screen *screen);
void r600_init_surface_functions(struct r600_context *r600);
unsigned r600_texture_get_offset(struct r600_resource_texture *rtex,
					unsigned level, unsigned layer);

/* r600_translate.c */
void r600_translate_index_buffer(struct r600_context *r600,
				 struct pipe_index_buffer *ib,
				 unsigned count);

/* r600_state_common.c */
void r600_init_common_atoms(struct r600_context *rctx);
unsigned r600_get_cb_flush_flags(struct r600_context *rctx);

/*
 * common helpers
 */
static INLINE uint32_t S_FIXED(float value, uint32_t frac_bits)
{
	return value * (1 << frac_bits);
}
#define ALIGN_DIVUP(x, y) (((x) + (y) - 1) / (y))

static INLINE unsigned si_map_swizzle(unsigned swizzle)
{
	switch (swizzle) {
	case UTIL_FORMAT_SWIZZLE_Y:
		return V_008F0C_SQ_SEL_Y;
	case UTIL_FORMAT_SWIZZLE_Z:
		return V_008F0C_SQ_SEL_Z;
	case UTIL_FORMAT_SWIZZLE_W:
		return V_008F0C_SQ_SEL_W;
	case UTIL_FORMAT_SWIZZLE_0:
		return V_008F0C_SQ_SEL_0;
	case UTIL_FORMAT_SWIZZLE_1:
		return V_008F0C_SQ_SEL_1;
	default: /* UTIL_FORMAT_SWIZZLE_X */
		return V_008F0C_SQ_SEL_X;
	}
}

static inline unsigned r600_tex_aniso_filter(unsigned filter)
{
	if (filter <= 1)   return 0;
	if (filter <= 2)   return 1;
	if (filter <= 4)   return 2;
	if (filter <= 8)   return 3;
	 /* else */        return 4;
}

/* 12.4 fixed-point */
static INLINE unsigned r600_pack_float_12p4(float x)
{
	return x <= 0    ? 0 :
	       x >= 4096 ? 0xffff : x * 16;
}

static INLINE uint64_t r600_resource_va(struct pipe_screen *screen, struct pipe_resource *resource)
{
	struct r600_screen *rscreen = (struct r600_screen*)screen;
	struct r600_resource *rresource = (struct r600_resource*)resource;

	return rscreen->ws->buffer_get_virtual_address(rresource->cs_buf);
}

#endif