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/*
* Copyright © 2012 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 gen8_sol_state.c
*
* Controls the stream output logic (SOL) stage of the gen8 hardware, which is
* used to implement GL_EXT_transform_feedback.
*/
#include "brw_context.h"
#include "brw_state.h"
#include "brw_defines.h"
#include "intel_batchbuffer.h"
#include "intel_buffer_objects.h"
#include "main/transformfeedback.h"
static void
gen8_upload_3dstate_so_buffers(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
/* BRW_NEW_TRANSFORM_FEEDBACK */
struct gl_transform_feedback_object *xfb_obj =
ctx->TransformFeedback.CurrentObject;
struct brw_transform_feedback_object *brw_obj =
(struct brw_transform_feedback_object *) xfb_obj;
/* Set up the up to 4 output buffers. These are the ranges defined in the
* gl_transform_feedback_object.
*/
for (int i = 0; i < 4; i++) {
struct intel_buffer_object *bufferobj =
intel_buffer_object(xfb_obj->Buffers[i]);
if (!bufferobj) {
BEGIN_BATCH(8);
OUT_BATCH(_3DSTATE_SO_BUFFER << 16 | (8 - 2));
OUT_BATCH((i << SO_BUFFER_INDEX_SHIFT));
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
continue;
}
uint32_t start = xfb_obj->Offset[i];
assert(start % 4 == 0);
uint32_t end = ALIGN(start + xfb_obj->Size[i], 4);
drm_intel_bo *bo =
intel_bufferobj_buffer(brw, bufferobj, start, end - start);
assert(end <= bo->size);
perf_debug("Missing MOCS setup for 3DSTATE_SO_BUFFER.");
BEGIN_BATCH(8);
OUT_BATCH(_3DSTATE_SO_BUFFER << 16 | (8 - 2));
OUT_BATCH(GEN8_SO_BUFFER_ENABLE | (i << SO_BUFFER_INDEX_SHIFT) |
GEN8_SO_BUFFER_OFFSET_WRITE_ENABLE |
GEN8_SO_BUFFER_OFFSET_ADDRESS_ENABLE |
(BDW_MOCS_WB << 22));
OUT_RELOC64(bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, start);
OUT_BATCH(xfb_obj->Size[i] / 4 - 1);
OUT_RELOC64(brw_obj->offset_bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
i * sizeof(uint32_t));
if (brw_obj->zero_offsets)
OUT_BATCH(0); /* Zero out the offset and write that to offset_bo */
else
OUT_BATCH(0xFFFFFFFF); /* Use offset_bo as the "Stream Offset." */
ADVANCE_BATCH();
}
brw_obj->zero_offsets = false;
}
static void
gen8_upload_3dstate_streamout(struct brw_context *brw, bool active,
struct brw_vue_map *vue_map)
{
struct gl_context *ctx = &brw->ctx;
/* BRW_NEW_TRANSFORM_FEEDBACK */
struct gl_transform_feedback_object *xfb_obj =
ctx->TransformFeedback.CurrentObject;
const struct gl_transform_feedback_info *linked_xfb_info =
&xfb_obj->shader_program->LinkedTransformFeedback;
uint32_t dw1 = 0, dw2 = 0, dw3 = 0, dw4 = 0;
if (active) {
int urb_entry_read_offset = 0;
int urb_entry_read_length = (vue_map->num_slots + 1) / 2 -
urb_entry_read_offset;
dw1 |= SO_FUNCTION_ENABLE;
dw1 |= SO_STATISTICS_ENABLE;
/* _NEW_LIGHT */
if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION)
dw1 |= SO_REORDER_TRAILING;
/* We always read the whole vertex. This could be reduced at some
* point by reading less and offsetting the register index in the
* SO_DECLs.
*/
dw2 |= urb_entry_read_offset << SO_STREAM_0_VERTEX_READ_OFFSET_SHIFT;
dw2 |= (urb_entry_read_length - 1) << SO_STREAM_0_VERTEX_READ_LENGTH_SHIFT;
/* Set buffer pitches; 0 means unbound. */
if (xfb_obj->Buffers[0])
dw3 |= linked_xfb_info->BufferStride[0] * 4;
if (xfb_obj->Buffers[1])
dw3 |= (linked_xfb_info->BufferStride[1] * 4) << 16;
if (xfb_obj->Buffers[2])
dw4 |= linked_xfb_info->BufferStride[2] * 4;
if (xfb_obj->Buffers[3])
dw4 |= (linked_xfb_info->BufferStride[3] * 4) << 16;
}
BEGIN_BATCH(5);
OUT_BATCH(_3DSTATE_STREAMOUT << 16 | (5 - 2));
OUT_BATCH(dw1);
OUT_BATCH(dw2);
OUT_BATCH(dw3);
OUT_BATCH(dw4);
ADVANCE_BATCH();
}
static void
upload_sol_state(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
/* BRW_NEW_TRANSFORM_FEEDBACK */
bool active = _mesa_is_xfb_active_and_unpaused(ctx);
if (active) {
gen8_upload_3dstate_so_buffers(brw);
/* BRW_NEW_VUE_MAP_GEOM_OUT */
gen7_upload_3dstate_so_decl_list(brw, &brw->vue_map_geom_out);
}
gen8_upload_3dstate_streamout(brw, active, &brw->vue_map_geom_out);
}
const struct brw_tracked_state gen8_sol_state = {
.dirty = {
.mesa = _NEW_LIGHT,
.brw = BRW_NEW_BATCH |
BRW_NEW_TRANSFORM_FEEDBACK |
BRW_NEW_VUE_MAP_GEOM_OUT,
.cache = 0,
},
.emit = upload_sol_state,
};
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