/*
 * Copyright 2012 Advanced Micro Devices, 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
 * 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:
 *      Christian König <christian.koenig@amd.com>
 */

#ifndef SI_STATE_H
#define SI_STATE_H

#include "si_pm4.h"
#include "../radeon/r600_pipe_common.h"

struct si_state_blend {
	struct si_pm4_state	pm4;
	uint32_t		cb_target_mask;
	bool			alpha_to_one;
};

struct si_state_viewport {
	struct si_pm4_state		pm4;
	struct pipe_viewport_state	viewport;
};

struct si_state_rasterizer {
	struct si_pm4_state	pm4;
	bool			flatshade;
	bool			two_side;
	bool			multisample_enable;
	bool			line_stipple_enable;
	unsigned		sprite_coord_enable;
	unsigned		pa_sc_line_stipple;
	unsigned		pa_su_sc_mode_cntl;
	unsigned		pa_cl_clip_cntl;
	unsigned		pa_cl_vs_out_cntl;
	unsigned		clip_plane_enable;
	float			offset_units;
	float			offset_scale;
};

struct si_state_dsa {
	struct si_pm4_state	pm4;
	float			alpha_ref;
	unsigned		alpha_func;
	unsigned		db_render_control;
	uint8_t			valuemask[2];
	uint8_t			writemask[2];
};

struct si_vertex_element
{
	unsigned			count;
	uint32_t			rsrc_word3[PIPE_MAX_ATTRIBS];
	struct pipe_vertex_element	elements[PIPE_MAX_ATTRIBS];
};

union si_state {
	struct {
		struct si_pm4_state		*init;
		struct si_state_blend		*blend;
		struct si_pm4_state		*blend_color;
		struct si_pm4_state		*clip;
		struct si_pm4_state		*sample_mask;
		struct si_pm4_state		*scissor;
		struct si_state_viewport	*viewport;
		struct si_pm4_state		*framebuffer;
		struct si_state_rasterizer	*rasterizer;
		struct si_state_dsa		*dsa;
		struct si_pm4_state		*fb_rs;
		struct si_pm4_state		*fb_blend;
		struct si_pm4_state		*dsa_stencil_ref;
		struct si_pm4_state		*es;
		struct si_pm4_state		*gs;
		struct si_pm4_state		*gs_rings;
		struct si_pm4_state		*gs_sampler;
		struct si_pm4_state		*gs_onoff;
		struct si_pm4_state		*vs;
		struct si_pm4_state		*vs_sampler;
		struct si_pm4_state		*ps;
		struct si_pm4_state		*ps_sampler;
		struct si_pm4_state		*spi;
		struct si_pm4_state		*vertex_buffers;
		struct si_pm4_state		*draw_info;
		struct si_pm4_state		*draw;
	} named;
	struct si_pm4_state	*array[0];
};

#define NUM_TEX_UNITS 16

/* User sampler views:   0..15
 * FMASK sampler views: 16..31 (no sampler states)
 */
#define FMASK_TEX_OFFSET	NUM_TEX_UNITS
#define NUM_SAMPLER_VIEWS	(FMASK_TEX_OFFSET+NUM_TEX_UNITS)
#define NUM_SAMPLER_STATES	NUM_TEX_UNITS

#define NUM_PIPE_CONST_BUFFERS	16
#define NUM_CONST_BUFFERS	(NUM_PIPE_CONST_BUFFERS + 1)

#define SI_RING_ESGS		0
#define SI_RING_GSVS		1

/* This represents resource descriptors in memory, such as buffer resources,
 * image resources, and sampler states.
 */
struct si_descriptors {
	struct r600_atom atom;

	/* The size of one resource descriptor. */
	unsigned element_dw_size;
	/* The maximum number of resource descriptors. */
	unsigned num_elements;

	/* The buffer where resource descriptors are stored. */
	struct r600_resource *buffer;

	/* The i-th bit is set if that element is dirty (changed but not emitted). */
	unsigned dirty_mask;
	/* The i-th bit is set if that element is enabled (non-NULL resource). */
	unsigned enabled_mask;

	/* We can't update descriptors directly because the GPU might be
	 * reading them at the same time, so we have to update them
	 * in a copy-on-write manner. Each such copy is called a context,
	 * which is just another array descriptors in the same buffer. */
	unsigned current_context_id;
	/* The size of a context, should be equal to 4*element_dw_size*num_elements. */
	unsigned context_size;

	/* The shader userdata register where the 64-bit pointer to the descriptor
	 * array will be stored. */
	unsigned shader_userdata_reg;
};

struct si_sampler_views {
	struct si_descriptors		desc;
	struct pipe_sampler_view	*views[NUM_SAMPLER_VIEWS];
	uint32_t			*desc_data[NUM_SAMPLER_VIEWS];
};

struct si_buffer_resources {
	struct si_descriptors		desc;
	unsigned			num_buffers;
	enum radeon_bo_usage		shader_usage; /* READ, WRITE, or READWRITE */
	struct pipe_resource		**buffers; /* this has num_buffers elements */
	uint32_t			*desc_storage; /* this has num_buffers*4 elements */
	uint32_t			**desc_data; /* an array of pointers pointing to desc_storage */
};

#define si_pm4_block_idx(member) \
	(offsetof(union si_state, named.member) / sizeof(struct si_pm4_state *))

#define si_pm4_state_changed(sctx, member) \
	((sctx)->queued.named.member != (sctx)->emitted.named.member)

#define si_pm4_bind_state(sctx, member, value) \
	do { \
		(sctx)->queued.named.member = (value); \
	} while(0)

#define si_pm4_delete_state(sctx, member, value) \
	do { \
		if ((sctx)->queued.named.member == (value)) { \
			(sctx)->queued.named.member = NULL; \
		} \
		si_pm4_free_state(sctx, (struct si_pm4_state *)(value), \
				  si_pm4_block_idx(member)); \
	} while(0)

#define si_pm4_set_state(sctx, member, value) \
	do { \
		if ((sctx)->queued.named.member != (value)) { \
			si_pm4_free_state(sctx, \
				(struct si_pm4_state *)(sctx)->queued.named.member, \
				si_pm4_block_idx(member)); \
			(sctx)->queued.named.member = (value); \
		} \
	} while(0)

/* si_descriptors.c */
void si_set_sampler_view(struct si_context *sctx, unsigned shader,
			 unsigned slot, struct pipe_sampler_view *view,
			 unsigned *view_desc);
void si_set_ring_buffer(struct pipe_context *ctx, uint shader, uint slot,
			struct pipe_constant_buffer *input,
			unsigned stride, unsigned num_records,
			bool add_tid, bool swizzle,
			unsigned element_size, unsigned index_stride);
void si_init_all_descriptors(struct si_context *sctx);
void si_release_all_descriptors(struct si_context *sctx);
void si_all_descriptors_begin_new_cs(struct si_context *sctx);
void si_copy_buffer(struct si_context *sctx,
		    struct pipe_resource *dst, struct pipe_resource *src,
		    uint64_t dst_offset, uint64_t src_offset, unsigned size);
void si_upload_const_buffer(struct si_context *sctx, struct r600_resource **rbuffer,
			    const uint8_t *ptr, unsigned size, uint32_t *const_offset);

/* si_state.c */
struct si_pipe_shader_selector;
struct si_surface;

boolean si_is_format_supported(struct pipe_screen *screen,
                               enum pipe_format format,
                               enum pipe_texture_target target,
                               unsigned sample_count,
                               unsigned usage);
int si_shader_select(struct pipe_context *ctx,
		     struct si_pipe_shader_selector *sel);
void si_init_state_functions(struct si_context *sctx);
void si_init_config(struct si_context *sctx);

/* si_state_draw.c */
extern const struct r600_atom si_atom_cache_flush;
void si_emit_cache_flush(struct r600_common_context *sctx, struct r600_atom *atom);
void si_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *dinfo);

/* si_commands.c */
void si_cmd_context_control(struct si_pm4_state *pm4);
void si_cmd_draw_index_2(struct si_pm4_state *pm4, uint32_t max_size,
			 uint64_t index_base, uint32_t index_count,
			 uint32_t initiator, bool predicate);
void si_cmd_draw_index_auto(struct si_pm4_state *pm4, uint32_t count,
			    uint32_t initiator, bool predicate);
void si_cmd_surface_sync(struct si_pm4_state *pm4, uint32_t cp_coher_cntl);

#endif
