radv: emit geometry shaders to hardware

This emits the compiled geometry shader and other state registers.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 9bc50ad0929c3cf44a3ab2026911782efbdebe4a..c5f6a9f6fbc6c64efaca8fa7ca647a94a1d3b91d 100644 (file)
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -550,7 +550,93 @@ radv_emit_vertex_shader(struct radv_cmd_buffer *cmd_buffer,
        radeon_set_context_reg(cmd_buffer->cs, R_028A84_VGT_PRIMITIVEID_EN, 0);
 }
 
+static uint32_t si_vgt_gs_mode(struct radv_shader_variant *gs)
+{
+       unsigned gs_max_vert_out = gs->info.gs.vertices_out;
+       unsigned cut_mode;
 
+       if (gs_max_vert_out <= 128) {
+               cut_mode = V_028A40_GS_CUT_128;
+       } else if (gs_max_vert_out <= 256) {
+               cut_mode = V_028A40_GS_CUT_256;
+       } else if (gs_max_vert_out <= 512) {
+               cut_mode = V_028A40_GS_CUT_512;
+       } else {
+               assert(gs_max_vert_out <= 1024);
+               cut_mode = V_028A40_GS_CUT_1024;
+       }
+
+       return S_028A40_MODE(V_028A40_GS_SCENARIO_G) |
+              S_028A40_CUT_MODE(cut_mode)|
+              S_028A40_ES_WRITE_OPTIMIZE(1) |
+              S_028A40_GS_WRITE_OPTIMIZE(1);
+}
+
+static void
+radv_emit_geometry_shader(struct radv_cmd_buffer *cmd_buffer,
+                         struct radv_pipeline *pipeline)
+{
+       struct radeon_winsys *ws = cmd_buffer->device->ws;
+       struct radv_shader_variant *gs;
+       uint64_t va;
+
+       gs = pipeline->shaders[MESA_SHADER_GEOMETRY];
+       if (!gs) {
+               radeon_set_context_reg(cmd_buffer->cs, R_028A40_VGT_GS_MODE, 0);
+               return;
+       }
+
+       radeon_set_context_reg(cmd_buffer->cs, R_028A40_VGT_GS_MODE, si_vgt_gs_mode(gs));
+
+       uint32_t gsvs_itemsize = gs->info.gs.max_gsvs_emit_size >> 2;
+
+       radeon_set_context_reg_seq(cmd_buffer->cs, R_028A60_VGT_GSVS_RING_OFFSET_1, 3);
+       radeon_emit(cmd_buffer->cs, gsvs_itemsize);
+       radeon_emit(cmd_buffer->cs, gsvs_itemsize);
+       radeon_emit(cmd_buffer->cs, gsvs_itemsize);
+
+       radeon_set_context_reg(cmd_buffer->cs, R_028AB0_VGT_GSVS_RING_ITEMSIZE, gsvs_itemsize);
+
+       radeon_set_context_reg(cmd_buffer->cs, R_028B38_VGT_GS_MAX_VERT_OUT, gs->info.gs.vertices_out);
+
+       uint32_t gs_vert_itemsize = gs->info.gs.gsvs_vertex_size;
+       radeon_set_context_reg_seq(cmd_buffer->cs, R_028B5C_VGT_GS_VERT_ITEMSIZE, 4);
+       radeon_emit(cmd_buffer->cs, gs_vert_itemsize >> 2);
+       radeon_emit(cmd_buffer->cs, 0);
+       radeon_emit(cmd_buffer->cs, 0);
+       radeon_emit(cmd_buffer->cs, 0);
+
+       uint32_t gs_num_invocations = gs->info.gs.invocations;
+       radeon_set_context_reg(cmd_buffer->cs, R_028B90_VGT_GS_INSTANCE_CNT,
+                              S_028B90_CNT(MIN2(gs_num_invocations, 127)) |
+                              S_028B90_ENABLE(gs_num_invocations > 0));
+
+       va = ws->buffer_get_va(gs->bo);
+       ws->cs_add_buffer(cmd_buffer->cs, gs->bo, 8);
+       radeon_set_sh_reg_seq(cmd_buffer->cs, R_00B220_SPI_SHADER_PGM_LO_GS, 4);
+       radeon_emit(cmd_buffer->cs, va >> 8);
+       radeon_emit(cmd_buffer->cs, va >> 40);
+       radeon_emit(cmd_buffer->cs, gs->rsrc1);
+       radeon_emit(cmd_buffer->cs, gs->rsrc2);
+
+       radv_emit_hw_vs(cmd_buffer, pipeline, pipeline->gs_copy_shader);
+
+       struct ac_userdata_info *loc = radv_lookup_user_sgpr(cmd_buffer->state.pipeline, MESA_SHADER_GEOMETRY,
+                                                            AC_UD_GS_VS_RING_STRIDE_ENTRIES);
+       if (loc->sgpr_idx != -1) {
+               uint32_t stride = gs->info.gs.max_gsvs_emit_size;
+               uint32_t num_entries = 64;
+               bool is_vi = cmd_buffer->device->physical_device->rad_info.chip_class >= VI;
+
+               if (is_vi)
+                       num_entries *= stride;
+
+               stride = S_008F04_STRIDE(stride);
+               radeon_set_sh_reg_seq(cmd_buffer->cs, R_00B230_SPI_SHADER_USER_DATA_GS_0 + loc->sgpr_idx * 4, 2);
+               radeon_emit(cmd_buffer->cs, stride);
+               radeon_emit(cmd_buffer->cs, num_entries);
+       }
+}
 
 static void
 radv_emit_fragment_shader(struct radv_cmd_buffer *cmd_buffer,
@@ -566,7 +652,7 @@ radv_emit_fragment_shader(struct radv_cmd_buffer *cmd_buffer,
        assert (pipeline->shaders[MESA_SHADER_FRAGMENT]);
 
        ps = pipeline->shaders[MESA_SHADER_FRAGMENT];
-       vs = pipeline->shaders[MESA_SHADER_VERTEX];
+       vs = radv_pipeline_has_gs(pipeline) ? pipeline->gs_copy_shader : pipeline->shaders[MESA_SHADER_VERTEX];
        va = ws->buffer_get_va(ps->bo);
        ws->cs_add_buffer(cmd_buffer->cs, ps->bo, 8);
 
@@ -656,6 +742,7 @@ radv_emit_graphics_pipeline(struct radv_cmd_buffer *cmd_buffer,
        radv_emit_graphics_raster_state(cmd_buffer, pipeline);
        radv_update_multisample_state(cmd_buffer, pipeline);
        radv_emit_vertex_shader(cmd_buffer, pipeline);
+       radv_emit_geometry_shader(cmd_buffer, pipeline);
        radv_emit_fragment_shader(cmd_buffer, pipeline);
 
        radeon_set_context_reg(cmd_buffer->cs, R_028A94_VGT_MULTI_PRIM_IB_RESET_EN,
@@ -1215,7 +1302,14 @@ radv_cmd_buffer_flush_state(struct radv_cmd_buffer *cmd_buffer)
                radv_emit_scissor(cmd_buffer);
 
        if (cmd_buffer->state.dirty & RADV_CMD_DIRTY_PIPELINE) {
-               radeon_set_context_reg(cmd_buffer->cs, R_028B54_VGT_SHADER_STAGES_EN, 0);
+               uint32_t stages = 0;
+
+               if (radv_pipeline_has_gs(cmd_buffer->state.pipeline))
+                       stages |= S_028B54_ES_EN(V_028B54_ES_STAGE_REAL) |
+                               S_028B54_GS_EN(1) |
+                               S_028B54_VS_EN(V_028B54_VS_STAGE_COPY_SHADER);
+
+               radeon_set_context_reg(cmd_buffer->cs, R_028B54_VGT_SHADER_STAGES_EN, stages);
                ia_multi_vgt_param = si_get_ia_multi_vgt_param(cmd_buffer);
 
                if (cmd_buffer->device->physical_device->rad_info.chip_class >= CIK) {