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 };