src/mesa/drivers/dri/i965/gen8_sf_state.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "compiler/nir/nir.h"
  25 #include "brw_context.h"
  26 #include "brw_state.h"
  27 #include "brw_defines.h"
  28 #include "brw_util.h"
  29 #include "main/macros.h"
  30 #include "main/fbobject.h"
  31 #include "intel_batchbuffer.h"
  32
  33 static void
  34 upload_sbe(struct brw_context *brw)
  35 {
  36    struct gl_context *ctx = &brw->ctx;
  37    /* BRW_NEW_FS_PROG_DATA */
  38    const struct brw_wm_prog_data *wm_prog_data =
  39       brw_wm_prog_data(brw->wm.base.prog_data);
  40    uint32_t num_outputs = wm_prog_data->num_varying_inputs;
  41    uint16_t attr_overrides[VARYING_SLOT_MAX];
  42    uint32_t urb_entry_read_length;
  43    uint32_t urb_entry_read_offset;
  44    uint32_t point_sprite_enables;
  45    int sbe_cmd_length;
  46
  47    uint32_t dw1 =
  48       GEN7_SBE_SWIZZLE_ENABLE |
  49       num_outputs << GEN7_SBE_NUM_OUTPUTS_SHIFT;
  50    uint32_t dw4 = 0;
  51    uint32_t dw5 = 0;
  52
  53    /* _NEW_BUFFERS */
  54    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
  55
  56    /* _NEW_POINT
  57     *
  58     * Window coordinates in an FBO are inverted, which means point
  59     * sprite origin must be inverted.
  60     */
  61    if ((ctx->Point.SpriteOrigin == GL_LOWER_LEFT) != render_to_fbo)
  62       dw1 |= GEN6_SF_POINT_SPRITE_LOWERLEFT;
  63    else
  64       dw1 |= GEN6_SF_POINT_SPRITE_UPPERLEFT;
  65
  66    /* _NEW_POINT | _NEW_LIGHT | _NEW_PROGRAM,
  67     * BRW_NEW_FS_PROG_DATA | BRW_NEW_FRAGMENT_PROGRAM |
  68     * BRW_NEW_GS_PROG_DATA | BRW_NEW_PRIMITIVE | BRW_NEW_TES_PROG_DATA |
  69     * BRW_NEW_VUE_MAP_GEOM_OUT
  70     */
  71    calculate_attr_overrides(brw, attr_overrides,
  72                             &point_sprite_enables,
  73                             &urb_entry_read_length,
  74                             &urb_entry_read_offset);
  75
  76    /* Typically, the URB entry read length and offset should be programmed in
  77     * 3DSTATE_VS and 3DSTATE_GS; SBE inherits it from the last active stage
  78     * which produces geometry.  However, we don't know the proper value until
  79     * we call calculate_attr_overrides().
  80     *
  81     * To fit with our existing code, we override the inherited values and
  82     * specify it here directly, as we did on previous generations.
  83     */
  84    dw1 |=
  85       urb_entry_read_length << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
  86       urb_entry_read_offset << GEN8_SBE_URB_ENTRY_READ_OFFSET_SHIFT |
  87       GEN8_SBE_FORCE_URB_ENTRY_READ_LENGTH |
  88       GEN8_SBE_FORCE_URB_ENTRY_READ_OFFSET;
  89
  90    if (brw->gen == 8) {
  91       sbe_cmd_length = 4;
  92    } else {
  93       sbe_cmd_length = 6;
  94
  95       /* prepare the active component dwords */
  96       int input_index = 0;
  97       for (int attr = 0; attr < VARYING_SLOT_MAX; attr++) {
  98          if (!(brw->fragment_program->info.inputs_read &
  99                BITFIELD64_BIT(attr))) {
 100             continue;
 101          }
 102
 103          assert(input_index < 32);
 104
 105          if (input_index < 16)
 106             dw4 |= (GEN9_SBE_ACTIVE_COMPONENT_XYZW << (input_index << 1));
 107          else
 108             dw5 |= (GEN9_SBE_ACTIVE_COMPONENT_XYZW << ((input_index - 16) << 1));
 109
 110          ++input_index;
 111       }
 112    }
 113    BEGIN_BATCH(sbe_cmd_length);
 114    OUT_BATCH(_3DSTATE_SBE << 16 | (sbe_cmd_length - 2));
 115    OUT_BATCH(dw1);
 116    OUT_BATCH(point_sprite_enables);
 117    OUT_BATCH(wm_prog_data->flat_inputs);
 118    if (sbe_cmd_length >= 6) {
 119       OUT_BATCH(dw4);
 120       OUT_BATCH(dw5);
 121    }
 122    ADVANCE_BATCH();
 123
 124    BEGIN_BATCH(11);
 125    OUT_BATCH(_3DSTATE_SBE_SWIZ << 16 | (11 - 2));
 126
 127    /* Output DWords 1 through 8: */
 128    for (int i = 0; i < 8; i++) {
 129       OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
 130    }
 131
 132    OUT_BATCH(0); /* wrapshortest enables 0-7 */
 133    OUT_BATCH(0); /* wrapshortest enables 8-15 */
 134    ADVANCE_BATCH();
 135 }
 136
 137 const struct brw_tracked_state gen8_sbe_state = {
 138    .dirty = {
 139       .mesa  = _NEW_BUFFERS |
 140                _NEW_LIGHT |
 141                _NEW_POINT |
 142                _NEW_POLYGON |
 143                _NEW_PROGRAM,
 144       .brw   = BRW_NEW_BLORP |
 145                BRW_NEW_CONTEXT |
 146                BRW_NEW_FRAGMENT_PROGRAM |
 147                BRW_NEW_FS_PROG_DATA |
 148                BRW_NEW_GS_PROG_DATA |
 149                BRW_NEW_TES_PROG_DATA |
 150                BRW_NEW_VUE_MAP_GEOM_OUT,
 151    },
 152    .emit = upload_sbe,
 153 };
 154
 155 static void
 156 upload_sf(struct brw_context *brw)
 157 {
 158    struct gl_context *ctx = &brw->ctx;
 159    uint32_t dw1 = 0, dw2 = 0, dw3 = 0;
 160    float point_size;
 161
 162    dw1 = GEN6_SF_STATISTICS_ENABLE;
 163
 164    if (brw->sf.viewport_transform_enable)
 165        dw1 |= GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 166
 167    /* _NEW_LINE */
 168    uint32_t line_width_u3_7 = brw_get_line_width(brw);
 169    if (brw->gen >= 9 || brw->is_cherryview) {
 170       dw1 |= line_width_u3_7 << GEN9_SF_LINE_WIDTH_SHIFT;
 171    } else {
 172       dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 173    }
 174
 175    if (ctx->Line.SmoothFlag) {
 176       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 177    }
 178
 179    /* _NEW_POINT - Clamp to ARB_point_parameters user limits */
 180    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 181
 182    /* Clamp to the hardware limits and convert to fixed point */
 183    dw3 |= U_FIXED(CLAMP(point_size, 0.125f, 255.875f), 3);
 184
 185    /* _NEW_PROGRAM | _NEW_POINT, BRW_NEW_VUE_MAP_GEOM_OUT */
 186    if (use_state_point_size(brw))
 187       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 188
 189    /* _NEW_POINT | _NEW_MULTISAMPLE */
 190    if ((ctx->Point.SmoothFlag || _mesa_is_multisample_enabled(ctx)) &&
 191        !ctx->Point.PointSprite) {
 192       dw3 |= GEN8_SF_SMOOTH_POINT_ENABLE;
 193    }
 194
 195    dw3 |= GEN6_SF_LINE_AA_MODE_TRUE;
 196
 197    /* _NEW_LIGHT */
 198    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 199       dw3 |= (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 200              (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 201              (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 202    } else {
 203       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 204    }
 205
 206    BEGIN_BATCH(4);
 207    OUT_BATCH(_3DSTATE_SF << 16 | (4 - 2));
 208    OUT_BATCH(dw1);
 209    OUT_BATCH(dw2);
 210    OUT_BATCH(dw3);
 211    ADVANCE_BATCH();
 212 }
 213
 214 const struct brw_tracked_state gen8_sf_state = {
 215    .dirty = {
 216       .mesa  = _NEW_LIGHT |
 217                _NEW_PROGRAM |
 218                _NEW_LINE |
 219                _NEW_MULTISAMPLE |
 220                _NEW_POINT,
 221       .brw   = BRW_NEW_BLORP |
 222                BRW_NEW_CONTEXT |
 223                BRW_NEW_VUE_MAP_GEOM_OUT,
 224    },
 225    .emit = upload_sf,
 226 };
 227
 228 static void
 229 upload_raster(struct brw_context *brw)
 230 {
 231    struct gl_context *ctx = &brw->ctx;
 232    uint32_t dw1 = 0;
 233
 234    /* _NEW_BUFFERS */
 235    bool render_to_fbo = _mesa_is_user_fbo(brw->ctx.DrawBuffer);
 236
 237    /* _NEW_POLYGON */
 238    if (ctx->Polygon._FrontBit == render_to_fbo)
 239       dw1 |= GEN8_RASTER_FRONT_WINDING_CCW;
 240
 241    if (ctx->Polygon.CullFlag) {
 242       switch (ctx->Polygon.CullFaceMode) {
 243       case GL_FRONT:
 244          dw1 |= GEN8_RASTER_CULL_FRONT;
 245          break;
 246       case GL_BACK:
 247          dw1 |= GEN8_RASTER_CULL_BACK;
 248          break;
 249       case GL_FRONT_AND_BACK:
 250          dw1 |= GEN8_RASTER_CULL_BOTH;
 251          break;
 252       default:
 253          unreachable("not reached");
 254       }
 255    } else {
 256       dw1 |= GEN8_RASTER_CULL_NONE;
 257    }
 258
 259    /* _NEW_POINT */
 260    if (ctx->Point.SmoothFlag)
 261       dw1 |= GEN8_RASTER_SMOOTH_POINT_ENABLE;
 262
 263    if (_mesa_is_multisample_enabled(ctx))
 264       dw1 |= GEN8_RASTER_API_MULTISAMPLE_ENABLE;
 265
 266    if (ctx->Polygon.OffsetFill)
 267       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 268
 269    if (ctx->Polygon.OffsetLine)
 270       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 271
 272    if (ctx->Polygon.OffsetPoint)
 273       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 274
 275    switch (ctx->Polygon.FrontMode) {
 276    case GL_FILL:
 277       dw1 |= GEN6_SF_FRONT_SOLID;
 278       break;
 279    case GL_LINE:
 280       dw1 |= GEN6_SF_FRONT_WIREFRAME;
 281       break;
 282    case GL_POINT:
 283       dw1 |= GEN6_SF_FRONT_POINT;
 284       break;
 285
 286    default:
 287       unreachable("not reached");
 288    }
 289
 290    switch (ctx->Polygon.BackMode) {
 291    case GL_FILL:
 292       dw1 |= GEN6_SF_BACK_SOLID;
 293       break;
 294    case GL_LINE:
 295       dw1 |= GEN6_SF_BACK_WIREFRAME;
 296       break;
 297    case GL_POINT:
 298       dw1 |= GEN6_SF_BACK_POINT;
 299       break;
 300    default:
 301       unreachable("not reached");
 302    }
 303
 304    /* _NEW_LINE */
 305    if (ctx->Line.SmoothFlag)
 306       dw1 |= GEN8_RASTER_LINE_AA_ENABLE;
 307
 308    /* _NEW_SCISSOR */
 309    if (ctx->Scissor.EnableFlags)
 310       dw1 |= GEN8_RASTER_SCISSOR_ENABLE;
 311
 312    /* _NEW_TRANSFORM */
 313    if (!ctx->Transform.DepthClamp) {
 314       if (brw->gen >= 9) {
 315          dw1 |= GEN9_RASTER_VIEWPORT_Z_NEAR_CLIP_TEST_ENABLE |
 316                 GEN9_RASTER_VIEWPORT_Z_FAR_CLIP_TEST_ENABLE;
 317       } else {
 318          dw1 |= GEN8_RASTER_VIEWPORT_Z_CLIP_TEST_ENABLE;
 319       }
 320    }
 321
 322    BEGIN_BATCH(5);
 323    OUT_BATCH(_3DSTATE_RASTER << 16 | (5 - 2));
 324    OUT_BATCH(dw1);
 325    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 326    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 327    OUT_BATCH_F(ctx->Polygon.OffsetClamp); /* global depth offset clamp */
 328    ADVANCE_BATCH();
 329 }
 330
 331 const struct brw_tracked_state gen8_raster_state = {
 332    .dirty = {
 333       .mesa  = _NEW_BUFFERS |
 334                _NEW_LINE |
 335                _NEW_MULTISAMPLE |
 336                _NEW_POINT |
 337                _NEW_POLYGON |
 338                _NEW_SCISSOR |
 339                _NEW_TRANSFORM,
 340       .brw   = BRW_NEW_BLORP |
 341                BRW_NEW_CONTEXT,
 342    },
 343    .emit = upload_raster,
 344 };