[mesa.git] / src / gallium / drivers / r600 / r600_pipe.h

/*
 * 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 R600_PIPE_H
#define R600_PIPE_H

#include "util/u_slab.h"
#include "r600.h"
#include "r600_shader.h"
#include "r600_resource.h"

#define R600_MAX_CONST_BUFFERS 2
#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;
};

/* This is an atom containing GPU commands that never change.
 * This is supposed to be copied directly into the CS. */
struct r600_command_buffer {
        struct r600_atom atom;
        uint32_t *buf;
        unsigned max_num_dw;
};

struct r600_surface_sync_cmd {
        struct r600_atom atom;
        unsigned flush_flags; /* CP_COHER_CNTL */
};

struct r600_db_misc_state {
        struct r600_atom atom;
        bool occlusion_query_enabled;
        bool flush_depthstencil_enabled;
};

struct r600_eg_streamout_state {
        struct r600_atom atom;
        bool rasterizer_discard;
        bool stream0_enable;
};

enum r600_pipe_state_id {
        R600_PIPE_STATE_BLEND = 0,
        R600_PIPE_STATE_BLEND_COLOR,
        R600_PIPE_STATE_CONFIG,
        R600_PIPE_STATE_SEAMLESS_CUBEMAP,
        R600_PIPE_STATE_CLIP,
        R600_PIPE_STATE_SCISSOR,
        R600_PIPE_STATE_VIEWPORT,
        R600_PIPE_STATE_RASTERIZER,
        R600_PIPE_STATE_VGT,
        R600_PIPE_STATE_FRAMEBUFFER,
        R600_PIPE_STATE_DSA,
        R600_PIPE_STATE_STENCIL_REF,
        R600_PIPE_STATE_PS_SHADER,
        R600_PIPE_STATE_VS_SHADER,
        R600_PIPE_STATE_CONSTANT,
        R600_PIPE_STATE_SAMPLER,
        R600_PIPE_STATE_RESOURCE,
        R600_PIPE_STATE_POLYGON_OFFSET,
        R600_PIPE_STATE_FETCH_SHADER,
        R600_PIPE_NSTATES
};

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;

        unsigned                        num_contexts;
        bool                            use_surface_alloc;

        /* for thread-safe write accessing to num_contexts */
        pipe_mutex                      mutex_num_contexts;
};

struct r600_pipe_sampler_view {
        struct pipe_sampler_view        base;
        struct r600_pipe_resource_state         state;
};

struct r600_pipe_rasterizer {
        struct r600_pipe_state          rstate;
        boolean                         flatshade;
        boolean                         two_side;
        unsigned                        sprite_coord_enable;
        unsigned                        clip_plane_enable;
        unsigned                        pa_sc_line_stipple;
        unsigned                        pa_cl_clip_cntl;
        float                           offset_units;
        float                           offset_scale;
        bool                            scissor_enable;
        bool                            rasterizer_discard;
};

struct r600_pipe_blend {
        struct r600_pipe_state          rstate;
        unsigned                        cb_target_mask;
        unsigned                        cb_color_control;
};

struct r600_pipe_dsa {
        struct r600_pipe_state          rstate;
        unsigned                        alpha_ref;
        ubyte                           valuemask[2];
        ubyte                           writemask[2];
        bool                            is_flush;
};

struct r600_vertex_element
{
        unsigned                        count;
        struct pipe_vertex_element      elements[PIPE_MAX_ATTRIBS];
        struct u_vbuf_elements          *vmgr_elements;
        struct r600_resource            *fetch_shader;
        unsigned                        fs_size;
        struct r600_pipe_state          rstate;
        /* if offset is to big for fetch instructio we need to alterate
         * offset of vertex buffer, record here the offset need to add
         */
        unsigned                        vbuffer_need_offset;
        unsigned                        vbuffer_offset[PIPE_MAX_ATTRIBS];
};

struct r600_pipe_shader {
        struct r600_shader              shader;
        struct r600_pipe_state          rstate;
        struct r600_resource            *bo;
        struct r600_resource            *bo_fetch;
        struct r600_vertex_element      vertex_elements;
        struct tgsi_token               *tokens;
        unsigned        sprite_coord_enable;
        unsigned        flatshade;
        unsigned        pa_cl_vs_out_cntl;
        struct pipe_stream_output_info  so;
};

struct r600_pipe_sampler_state {
        struct r600_pipe_state          rstate;
        boolean seamless_cube_map;
};

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

struct r600_textures_info {
        struct r600_pipe_sampler_view   *views[NUM_TEX_UNITS];
        struct r600_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_stencil_ref
{
        ubyte ref_value[2];
        ubyte valuemask[2];
        ubyte writemask[2];
};

struct r600_context {
        struct pipe_context             context;
        struct blitter_context          *blitter;
        enum radeon_family              family;
        enum chip_class                 chip_class;
        unsigned                        r6xx_num_clause_temp_gprs;
        void                            *custom_dsa_flush;
        struct r600_screen              *screen;
        struct radeon_winsys            *ws;
        struct r600_pipe_state          *states[R600_PIPE_NSTATES];
        struct r600_vertex_element      *vertex_elements;
        struct r600_pipe_resource_state fs_resource[PIPE_MAX_ATTRIBS];
        struct pipe_framebuffer_state   framebuffer;
        unsigned                        cb_target_mask;
        unsigned                        cb_color_control;
        unsigned                        pa_sc_line_stipple;
        unsigned                        pa_cl_clip_cntl;
        /* for saving when using blitter */
        struct pipe_stencil_ref         stencil_ref;
        struct pipe_viewport_state      viewport;
        struct pipe_clip_state          clip;
        struct r600_pipe_shader         *ps_shader;
        struct r600_pipe_shader         *vs_shader;
        struct r600_pipe_state          vs_const_buffer;
        struct r600_pipe_resource_state         vs_const_buffer_resource[R600_MAX_CONST_BUFFERS];
        struct r600_pipe_state          ps_const_buffer;
        struct r600_pipe_resource_state         ps_const_buffer_resource[R600_MAX_CONST_BUFFERS];
        struct r600_pipe_rasterizer     *rasterizer;
        struct r600_pipe_state          vgt;
        struct r600_pipe_state          spi;
        struct pipe_query               *current_render_cond;
        unsigned                        current_render_cond_mode;
        struct pipe_query               *saved_render_cond;
        unsigned                        saved_render_cond_mode;
        /* shader information */
        boolean                         two_side;
        unsigned                        sprite_coord_enable;
        boolean                         export_16bpc;
        unsigned                        alpha_ref;
        boolean                         alpha_ref_dirty;
        unsigned                        nr_cbufs;
        struct r600_textures_info       vs_samplers;
        struct r600_textures_info       ps_samplers;

        struct u_vbuf                   *vbuf_mgr;
        struct util_slab_mempool        pool_transfers;
        boolean                         have_depth_texture, have_depth_fb;

        unsigned default_ps_gprs, default_vs_gprs;

        /* States based on r600_atom. */
        struct list_head                dirty_states;
        struct r600_command_buffer      start_cs_cmd; /* invariant state mostly */
        struct r600_surface_sync_cmd    surface_sync_cmd;
        struct r600_atom                r6xx_flush_and_inv_cmd;
        struct r600_db_misc_state       db_misc_state;
        struct r600_eg_streamout_state  eg_streamout_state;

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

        struct r600_range       *range;
        unsigned                nblocks;
        struct r600_block       **blocks;
        struct list_head        dirty;
        struct list_head        resource_dirty;
        struct list_head        enable_list;
        unsigned                pm4_dirty_cdwords;
        unsigned                ctx_pm4_ndwords;

        /* The list of active queries. Only one query of each type can be active. */
        int                     num_occlusion_queries;

        /* Manage queries in two separate groups:
         * The timer ones and the others (streamout, occlusion).
         *
         * We do this because we should only suspend non-timer queries for u_blitter,
         * and later if the non-timer queries are suspended, the context flush should
         * only suspend and resume the timer queries. */
        struct list_head        active_timer_queries;
        unsigned                num_cs_dw_timer_queries_suspend;
        struct list_head        active_nontimer_queries;
        unsigned                num_cs_dw_nontimer_queries_suspend;

        unsigned                num_cs_dw_streamout_end;

        unsigned                backend_mask;
        unsigned                max_db; /* for OQ */
        unsigned                flags;
        boolean                 predicate_drawing;
        struct r600_range       ps_resources;
        struct r600_range       vs_resources;
        struct r600_range       fs_resources;
        int                     num_ps_resources, num_vs_resources, num_fs_resources;

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

        /* There is no scissor enable bit on r6xx, so we must use a workaround.
         * These track the current scissor state. */
        bool                    scissor_enable;
        struct pipe_scissor_state scissor_state;

        /* With rasterizer discard, there doesn't have to be a pixel shader.
         * In that case, we bind this one: */
        void                    *dummy_pixel_shader;
};

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;
        }
}

/* evergreen_state.c */
void evergreen_init_state_functions(struct r600_context *rctx);
void evergreen_init_atom_start_cs(struct r600_context *rctx);
void evergreen_pipe_shader_ps(struct pipe_context *ctx, struct r600_pipe_shader *shader);
void evergreen_pipe_shader_vs(struct pipe_context *ctx, struct r600_pipe_shader *shader);
void evergreen_fetch_shader(struct pipe_context *ctx, struct r600_vertex_element *ve);
void *evergreen_create_db_flush_dsa(struct r600_context *rctx);
void evergreen_polygon_offset_update(struct r600_context *rctx);
void evergreen_pipe_init_buffer_resource(struct r600_context *rctx,
                                         struct r600_pipe_resource_state *rstate);
void evergreen_pipe_mod_buffer_resource(struct pipe_context *ctx,
                                        struct r600_pipe_resource_state *rstate,
                                        struct r600_resource *rbuffer,
                                        unsigned offset, unsigned stride,
                                        enum radeon_bo_usage usage);
boolean evergreen_is_format_supported(struct pipe_screen *screen,
                                      enum pipe_format format,
                                      enum pipe_texture_target target,
                                      unsigned sample_count,
                                      unsigned usage);
void evergreen_set_rasterizer_discard(struct pipe_context *ctx, boolean discard);

/* 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);
struct pipe_resource *r600_user_buffer_create(struct pipe_screen *screen,
                                              void *ptr, unsigned bytes,
                                              unsigned bind);
void r600_upload_index_buffer(struct r600_context *rctx,
                              struct pipe_index_buffer *ib, unsigned count);


/* r600_pipe.c */
void r600_flush(struct pipe_context *ctx, struct pipe_fence_handle **fence,
                unsigned flags);

/* r600_query.c */
void r600_init_query_functions(struct r600_context *rctx);
void r600_suspend_nontimer_queries(struct r600_context *ctx);
void r600_resume_nontimer_queries(struct r600_context *ctx);
void r600_suspend_timer_queries(struct r600_context *ctx);
void r600_resume_timer_queries(struct r600_context *ctx);

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

/* r600_shader.c */
int r600_pipe_shader_create(struct pipe_context *ctx, struct r600_pipe_shader *shader);
void r600_pipe_shader_destroy(struct pipe_context *ctx, struct r600_pipe_shader *shader);
int r600_find_vs_semantic_index(struct r600_shader *vs,
                                struct r600_shader *ps, int id);

/* r600_state.c */
void r600_set_scissor_state(struct r600_context *rctx,
                            const struct pipe_scissor_state *state);
void r600_update_sampler_states(struct r600_context *rctx);
void r600_init_state_functions(struct r600_context *rctx);
void r600_init_atom_start_cs(struct r600_context *rctx);
void r600_pipe_shader_ps(struct pipe_context *ctx, struct r600_pipe_shader *shader);
void r600_pipe_shader_vs(struct pipe_context *ctx, struct r600_pipe_shader *shader);
void r600_fetch_shader(struct pipe_context *ctx, struct r600_vertex_element *ve);
void *r600_create_db_flush_dsa(struct r600_context *rctx);
void r600_polygon_offset_update(struct r600_context *rctx);
void r600_pipe_init_buffer_resource(struct r600_context *rctx,
                                    struct r600_pipe_resource_state *rstate);
void r600_pipe_mod_buffer_resource(struct r600_pipe_resource_state *rstate,
                                   struct r600_resource *rbuffer,
                                   unsigned offset, unsigned stride,
                                   enum radeon_bo_usage usage);
void r600_adjust_gprs(struct r600_context *rctx);
boolean r600_is_format_supported(struct pipe_screen *screen,
                                 enum pipe_format format,
                                 enum pipe_texture_target target,
                                 unsigned sample_count,
                                 unsigned usage);

/* r600_texture.c */
void r600_init_screen_texture_functions(struct pipe_screen *screen);
void r600_init_surface_functions(struct r600_context *r600);
uint32_t r600_translate_texformat(struct pipe_screen *screen, enum pipe_format format,
                                  const unsigned char *swizzle_view,
                                  uint32_t *word4_p, uint32_t *yuv_format_p);
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_atom(struct r600_atom *atom,
                    void (*emit)(struct r600_context *ctx, struct r600_atom *state),
                    unsigned num_dw, enum r600_atom_flags flags);
void r600_init_common_atoms(struct r600_context *rctx);
unsigned r600_get_cb_flush_flags(struct r600_context *rctx);
void r600_texture_barrier(struct pipe_context *ctx);
void r600_set_index_buffer(struct pipe_context *ctx,
                           const struct pipe_index_buffer *ib);
void r600_set_vertex_buffers(struct pipe_context *ctx, unsigned count,
                             const struct pipe_vertex_buffer *buffers);
void *r600_create_vertex_elements(struct pipe_context *ctx,
                                  unsigned count,
                                  const struct pipe_vertex_element *elements);
void r600_delete_vertex_element(struct pipe_context *ctx, void *state);
void r600_bind_blend_state(struct pipe_context *ctx, void *state);
void r600_set_blend_color(struct pipe_context *ctx,
                          const struct pipe_blend_color *state);
void r600_bind_dsa_state(struct pipe_context *ctx, void *state);
void r600_set_max_scissor(struct r600_context *rctx);
void r600_bind_rs_state(struct pipe_context *ctx, void *state);
void r600_delete_rs_state(struct pipe_context *ctx, void *state);
void r600_sampler_view_destroy(struct pipe_context *ctx,
                               struct pipe_sampler_view *state);
void r600_delete_state(struct pipe_context *ctx, void *state);
void r600_bind_vertex_elements(struct pipe_context *ctx, void *state);
void *r600_create_shader_state(struct pipe_context *ctx,
                               const struct pipe_shader_state *state);
void r600_bind_ps_shader(struct pipe_context *ctx, void *state);
void r600_bind_vs_shader(struct pipe_context *ctx, void *state);
void r600_delete_ps_shader(struct pipe_context *ctx, void *state);
void r600_delete_vs_shader(struct pipe_context *ctx, void *state);
void r600_set_constant_buffer(struct pipe_context *ctx, uint shader, uint index,
                              struct pipe_resource *buffer);
struct pipe_stream_output_target *
r600_create_so_target(struct pipe_context *ctx,
                      struct pipe_resource *buffer,
                      unsigned buffer_offset,
                      unsigned buffer_size);
void r600_so_target_destroy(struct pipe_context *ctx,
                            struct pipe_stream_output_target *target);
void r600_set_so_targets(struct pipe_context *ctx,
                         unsigned num_targets,
                         struct pipe_stream_output_target **targets,
                         unsigned append_bitmask);
void r600_set_pipe_stencil_ref(struct pipe_context *ctx,
                               const struct pipe_stencil_ref *state);
void r600_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *info);
uint32_t r600_translate_stencil_op(int s_op);
uint32_t r600_translate_fill(uint32_t func);
unsigned r600_tex_wrap(unsigned wrap);
unsigned r600_tex_filter(unsigned filter);
unsigned r600_tex_mipfilter(unsigned filter);
unsigned r600_tex_compare(unsigned compare);

/*
 * Helpers for building command buffers
 */

#define PKT3_SET_CONFIG_REG     0x68
#define PKT3_SET_CONTEXT_REG    0x69
#define PKT3_SET_CTL_CONST      0x6F
#define PKT3_SET_LOOP_CONST                    0x6C

#define R600_CONFIG_REG_OFFSET  0x08000
#define R600_CONTEXT_REG_OFFSET 0x28000
#define R600_CTL_CONST_OFFSET   0x3CFF0
#define R600_LOOP_CONST_OFFSET                 0X0003E200
#define EG_LOOP_CONST_OFFSET               0x0003A200

#define PKT_TYPE_S(x)                   (((x) & 0x3) << 30)
#define PKT_COUNT_S(x)                  (((x) & 0x3FFF) << 16)
#define PKT3_IT_OPCODE_S(x)             (((x) & 0xFF) << 8)
#define PKT3_PREDICATE(x)               (((x) >> 0) & 0x1)
#define PKT3(op, count, predicate) (PKT_TYPE_S(3) | PKT_COUNT_S(count) | PKT3_IT_OPCODE_S(op) | PKT3_PREDICATE(predicate))

static INLINE void r600_store_value(struct r600_command_buffer *cb, unsigned value)
{
        cb->buf[cb->atom.num_dw++] = value;
}

static INLINE void r600_store_config_reg_seq(struct r600_command_buffer *cb, unsigned reg, unsigned num)
{
        assert(reg < R600_CONTEXT_REG_OFFSET);
        assert(cb->atom.num_dw+2+num <= cb->max_num_dw);
        cb->buf[cb->atom.num_dw++] = PKT3(PKT3_SET_CONFIG_REG, num, 0);
        cb->buf[cb->atom.num_dw++] = (reg - R600_CONFIG_REG_OFFSET) >> 2;
}

static INLINE void r600_store_context_reg_seq(struct r600_command_buffer *cb, unsigned reg, unsigned num)
{
        assert(reg >= R600_CONTEXT_REG_OFFSET && reg < R600_CTL_CONST_OFFSET);
        assert(cb->atom.num_dw+2+num <= cb->max_num_dw);
        cb->buf[cb->atom.num_dw++] = PKT3(PKT3_SET_CONTEXT_REG, num, 0);
        cb->buf[cb->atom.num_dw++] = (reg - R600_CONTEXT_REG_OFFSET) >> 2;
}

static INLINE void r600_store_ctl_const_seq(struct r600_command_buffer *cb, unsigned reg, unsigned num)
{
        assert(reg >= R600_CTL_CONST_OFFSET);
        assert(cb->atom.num_dw+2+num <= cb->max_num_dw);
        cb->buf[cb->atom.num_dw++] = PKT3(PKT3_SET_CTL_CONST, num, 0);
        cb->buf[cb->atom.num_dw++] = (reg - R600_CTL_CONST_OFFSET) >> 2;
}

static INLINE void r600_store_loop_const_seq(struct r600_command_buffer *cb, unsigned reg, unsigned num)
{
        assert(reg >= R600_LOOP_CONST_OFFSET);
        assert(cb->atom.num_dw+2+num <= cb->max_num_dw);
        cb->buf[cb->atom.num_dw++] = PKT3(PKT3_SET_LOOP_CONST, num, 0);
        cb->buf[cb->atom.num_dw++] = (reg - R600_LOOP_CONST_OFFSET) >> 2;
}

static INLINE void eg_store_loop_const_seq(struct r600_command_buffer *cb, unsigned reg, unsigned num)
{
        assert(reg >= EG_LOOP_CONST_OFFSET);
        assert(cb->atom.num_dw+2+num <= cb->max_num_dw);
        cb->buf[cb->atom.num_dw++] = PKT3(PKT3_SET_LOOP_CONST, num, 0);
        cb->buf[cb->atom.num_dw++] = (reg - EG_LOOP_CONST_OFFSET) >> 2;
}

static INLINE void r600_store_config_reg(struct r600_command_buffer *cb, unsigned reg, unsigned value)
{
        r600_store_config_reg_seq(cb, reg, 1);
        r600_store_value(cb, value);
}

static INLINE void r600_store_context_reg(struct r600_command_buffer *cb, unsigned reg, unsigned value)
{
        r600_store_context_reg_seq(cb, reg, 1);
        r600_store_value(cb, value);
}

static INLINE void r600_store_ctl_const(struct r600_command_buffer *cb, unsigned reg, unsigned value)
{
        r600_store_ctl_const_seq(cb, reg, 1);
        r600_store_value(cb, value);
}

static INLINE void r600_store_loop_const(struct r600_command_buffer *cb, unsigned reg, unsigned value)
{
        r600_store_loop_const_seq(cb, reg, 1);
        r600_store_value(cb, value);
}

static INLINE void eg_store_loop_const(struct r600_command_buffer *cb, unsigned reg, unsigned value)
{
        eg_store_loop_const_seq(cb, reg, 1);
        r600_store_value(cb, value);
}

void r600_init_command_buffer(struct r600_command_buffer *cb, unsigned num_dw, enum r600_atom_flags flags);
void r600_release_command_buffer(struct r600_command_buffer *cb);

/*
 * Helpers for emitting state into a command stream directly.
 */

static INLINE unsigned r600_context_bo_reloc(struct r600_context *ctx, struct r600_resource *rbo,
                                             enum radeon_bo_usage usage)
{
        assert(usage);
        return ctx->ws->cs_add_reloc(ctx->cs, rbo->cs_buf, usage, rbo->domains) * 4;
}

static INLINE void r600_write_value(struct radeon_winsys_cs *cs, unsigned value)
{
        cs->buf[cs->cdw++] = value;
}

static INLINE void r600_write_config_reg_seq(struct radeon_winsys_cs *cs, unsigned reg, unsigned num)
{
        assert(reg < R600_CONTEXT_REG_OFFSET);
        assert(cs->cdw+2+num <= RADEON_MAX_CMDBUF_DWORDS);
        cs->buf[cs->cdw++] = PKT3(PKT3_SET_CONFIG_REG, num, 0);
        cs->buf[cs->cdw++] = (reg - R600_CONFIG_REG_OFFSET) >> 2;
}

static INLINE void r600_write_context_reg_seq(struct radeon_winsys_cs *cs, unsigned reg, unsigned num)
{
        assert(reg >= R600_CONTEXT_REG_OFFSET && reg < R600_CTL_CONST_OFFSET);
        assert(cs->cdw+2+num <= RADEON_MAX_CMDBUF_DWORDS);
        cs->buf[cs->cdw++] = PKT3(PKT3_SET_CONTEXT_REG, num, 0);
        cs->buf[cs->cdw++] = (reg - R600_CONTEXT_REG_OFFSET) >> 2;
}

static INLINE void r600_write_ctl_const_seq(struct radeon_winsys_cs *cs, unsigned reg, unsigned num)
{
        assert(reg >= R600_CTL_CONST_OFFSET);
        assert(cs->cdw+2+num <= RADEON_MAX_CMDBUF_DWORDS);
        cs->buf[cs->cdw++] = PKT3(PKT3_SET_CTL_CONST, num, 0);
        cs->buf[cs->cdw++] = (reg - R600_CTL_CONST_OFFSET) >> 2;
}

static INLINE void r600_write_config_reg(struct radeon_winsys_cs *cs, unsigned reg, unsigned value)
{
        r600_write_config_reg_seq(cs, reg, 1);
        r600_write_value(cs, value);
}

static INLINE void r600_write_context_reg(struct radeon_winsys_cs *cs, unsigned reg, unsigned value)
{
        r600_write_context_reg_seq(cs, reg, 1);
        r600_write_value(cs, value);
}

static INLINE void r600_write_ctl_const(struct radeon_winsys_cs *cs, unsigned reg, unsigned value)
{
        r600_write_ctl_const_seq(cs, reg, 1);
        r600_write_value(cs, value);
}

/*
 * 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 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;
}

#endif