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| /* |
| * Copyright © 2011 Intel Corporation |
| * |
| * 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 |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * 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 NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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. |
| */ |
| |
| /** \file gen6_sol.c |
| * |
| * Code to initialize the binding table entries used by transform feedback. |
| */ |
| |
| #include "main/macros.h" |
| #include "brw_context.h" |
| #include "intel_batchbuffer.h" |
| #include "brw_defines.h" |
| #include "brw_state.h" |
| #include "main/transformfeedback.h" |
| |
| static void |
| gen6_update_sol_surfaces(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->ctx; |
| /* BRW_NEW_TRANSFORM_FEEDBACK */ |
| struct gl_transform_feedback_object *xfb_obj = |
| ctx->TransformFeedback.CurrentObject; |
| /* BRW_NEW_VERTEX_PROGRAM */ |
| const struct gl_shader_program *shaderprog = |
| ctx->Shader.CurrentVertexProgram; |
| const struct gl_transform_feedback_info *linked_xfb_info = |
| &shaderprog->LinkedTransformFeedback; |
| int i; |
| |
| for (i = 0; i < BRW_MAX_SOL_BINDINGS; ++i) { |
| const int surf_index = SURF_INDEX_SOL_BINDING(i); |
| if (_mesa_is_xfb_active_and_unpaused(ctx) && |
| i < linked_xfb_info->NumOutputs) { |
| unsigned buffer = linked_xfb_info->Outputs[i].OutputBuffer; |
| unsigned buffer_offset = |
| xfb_obj->Offset[buffer] / 4 + |
| linked_xfb_info->Outputs[i].DstOffset; |
| brw_update_sol_surface( |
| brw, xfb_obj->Buffers[buffer], &brw->gs.surf_offset[surf_index], |
| linked_xfb_info->Outputs[i].NumComponents, |
| linked_xfb_info->BufferStride[buffer], buffer_offset); |
| } else { |
| brw->gs.surf_offset[surf_index] = 0; |
| } |
| } |
| |
| brw->state.dirty.brw |= BRW_NEW_SURFACES; |
| } |
| |
| const struct brw_tracked_state gen6_sol_surface = { |
| .dirty = { |
| .mesa = 0, |
| .brw = (BRW_NEW_BATCH | |
| BRW_NEW_VERTEX_PROGRAM | |
| BRW_NEW_TRANSFORM_FEEDBACK), |
| .cache = 0 |
| }, |
| .emit = gen6_update_sol_surfaces, |
| }; |
| |
| /** |
| * Constructs the binding table for the WM surface state, which maps unit |
| * numbers to surface state objects. |
| */ |
| static void |
| brw_gs_upload_binding_table(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->ctx; |
| /* BRW_NEW_VERTEX_PROGRAM */ |
| const struct gl_shader_program *shaderprog = |
| ctx->Shader.CurrentVertexProgram; |
| bool has_surfaces = false; |
| uint32_t *bind; |
| |
| if (shaderprog) { |
| const struct gl_transform_feedback_info *linked_xfb_info = |
| &shaderprog->LinkedTransformFeedback; |
| /* Currently we only ever upload surfaces for SOL. */ |
| has_surfaces = linked_xfb_info->NumOutputs != 0; |
| } |
| |
| /* Skip making a binding table if we don't have anything to put in it. */ |
| if (!has_surfaces) { |
| if (brw->gs.bind_bo_offset != 0) { |
| brw->state.dirty.brw |= BRW_NEW_GS_BINDING_TABLE; |
| brw->gs.bind_bo_offset = 0; |
| } |
| return; |
| } |
| |
| /* Might want to calculate nr_surfaces first, to avoid taking up so much |
| * space for the binding table. |
| */ |
| bind = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE, |
| sizeof(uint32_t) * BRW_MAX_GS_SURFACES, |
| 32, &brw->gs.bind_bo_offset); |
| |
| /* BRW_NEW_SURFACES */ |
| memcpy(bind, brw->gs.surf_offset, BRW_MAX_GS_SURFACES * sizeof(uint32_t)); |
| |
| brw->state.dirty.brw |= BRW_NEW_GS_BINDING_TABLE; |
| } |
| |
| const struct brw_tracked_state gen6_gs_binding_table = { |
| .dirty = { |
| .mesa = 0, |
| .brw = (BRW_NEW_BATCH | |
| BRW_NEW_VERTEX_PROGRAM | |
| BRW_NEW_SURFACES), |
| .cache = 0 |
| }, |
| .emit = brw_gs_upload_binding_table, |
| }; |
| |
| void |
| brw_begin_transform_feedback(struct gl_context *ctx, GLenum mode, |
| struct gl_transform_feedback_object *obj) |
| { |
| struct brw_context *brw = brw_context(ctx); |
| const struct gl_shader_program *vs_prog = |
| ctx->Shader.CurrentVertexProgram; |
| const struct gl_transform_feedback_info *linked_xfb_info = |
| &vs_prog->LinkedTransformFeedback; |
| struct gl_transform_feedback_object *xfb_obj = |
| ctx->TransformFeedback.CurrentObject; |
| |
| assert(brw->gen == 6); |
| |
| /* Compute the maximum number of vertices that we can write without |
| * overflowing any of the buffers currently being used for feedback. |
| */ |
| unsigned max_index |
| = _mesa_compute_max_transform_feedback_vertices(xfb_obj, |
| linked_xfb_info); |
| |
| /* 3DSTATE_GS_SVB_INDEX is non-pipelined. */ |
| intel_emit_post_sync_nonzero_flush(brw); |
| |
| /* Initialize the SVBI 0 register to zero and set the maximum index. */ |
| BEGIN_BATCH(4); |
| OUT_BATCH(_3DSTATE_GS_SVB_INDEX << 16 | (4 - 2)); |
| OUT_BATCH(0); /* SVBI 0 */ |
| OUT_BATCH(0); /* starting index */ |
| OUT_BATCH(max_index); |
| ADVANCE_BATCH(); |
| |
| /* Initialize the rest of the unused streams to sane values. Otherwise, |
| * they may indicate that there is no room to write data and prevent |
| * anything from happening at all. |
| */ |
| for (int i = 1; i < 4; i++) { |
| BEGIN_BATCH(4); |
| OUT_BATCH(_3DSTATE_GS_SVB_INDEX << 16 | (4 - 2)); |
| OUT_BATCH(i << SVB_INDEX_SHIFT); |
| OUT_BATCH(0); /* starting index */ |
| OUT_BATCH(0xffffffff); |
| ADVANCE_BATCH(); |
| } |
| } |
| |
| void |
| brw_end_transform_feedback(struct gl_context *ctx, |
| struct gl_transform_feedback_object *obj) |
| { |
| /* After EndTransformFeedback, it's likely that the client program will try |
| * to draw using the contents of the transform feedback buffer as vertex |
| * input. In order for this to work, we need to flush the data through at |
| * least the GS stage of the pipeline, and flush out the render cache. For |
| * simplicity, just do a full flush. |
| */ |
| struct brw_context *brw = brw_context(ctx); |
| intel_batchbuffer_emit_mi_flush(brw); |
| } |