#include "intel_buffer_objects.h"
#include "main/transformfeedback.h"
-static void
-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;
- const struct gl_transform_feedback_info *linked_xfb_info =
- xfb_obj->program->sh.LinkedTransformFeedback;
- int i;
-
- /* Set up the up to 4 output buffers. These are the ranges defined in the
- * gl_transform_feedback_object.
- */
- for (i = 0; i < 4; i++) {
- struct intel_buffer_object *bufferobj =
- intel_buffer_object(xfb_obj->Buffers[i]);
- drm_bacon_bo *bo;
- uint32_t start, end;
- uint32_t stride;
-
- if (!xfb_obj->Buffers[i]) {
- /* The pitch of 0 in this command indicates that the buffer is
- * unbound and won't be written to.
- */
- BEGIN_BATCH(4);
- OUT_BATCH(_3DSTATE_SO_BUFFER << 16 | (4 - 2));
- OUT_BATCH((i << SO_BUFFER_INDEX_SHIFT));
- OUT_BATCH(0);
- OUT_BATCH(0);
- ADVANCE_BATCH();
-
- continue;
- }
-
- stride = linked_xfb_info->Buffers[i].Stride * 4;
-
- start = xfb_obj->Offset[i];
- assert(start % 4 == 0);
- end = ALIGN(start + xfb_obj->Size[i], 4);
- bo = intel_bufferobj_buffer(brw, bufferobj, start, end - start);
- assert(end <= bo->size);
-
- BEGIN_BATCH(4);
- OUT_BATCH(_3DSTATE_SO_BUFFER << 16 | (4 - 2));
- OUT_BATCH((i << SO_BUFFER_INDEX_SHIFT) | stride);
- OUT_RELOC(bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, start);
- OUT_RELOC(bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, end);
- ADVANCE_BATCH();
- }
-}
-
-/**
- * Outputs the 3DSTATE_SO_DECL_LIST command.
- *
- * The data output is a series of 64-bit entries containing a SO_DECL per
- * stream. We only have one stream of rendering coming out of the GS unit, so
- * we only emit stream 0 (low 16 bits) SO_DECLs.
- */
-void
-gen7_upload_3dstate_so_decl_list(struct brw_context *brw,
- const 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->program->sh.LinkedTransformFeedback;
- uint16_t so_decl[MAX_VERTEX_STREAMS][128];
- int buffer_mask[MAX_VERTEX_STREAMS] = {0, 0, 0, 0};
- int next_offset[BRW_MAX_SOL_BUFFERS] = {0, 0, 0, 0};
- int decls[MAX_VERTEX_STREAMS] = {0, 0, 0, 0};
- int max_decls = 0;
- STATIC_ASSERT(ARRAY_SIZE(so_decl[0]) >= MAX_PROGRAM_OUTPUTS);
-
- memset(so_decl, 0, sizeof(so_decl));
-
- /* Construct the list of SO_DECLs to be emitted. The formatting of the
- * command is feels strange -- each dword pair contains a SO_DECL per stream.
- */
- for (unsigned i = 0; i < linked_xfb_info->NumOutputs; i++) {
- int buffer = linked_xfb_info->Outputs[i].OutputBuffer;
- uint16_t decl = 0;
- int varying = linked_xfb_info->Outputs[i].OutputRegister;
- const unsigned components = linked_xfb_info->Outputs[i].NumComponents;
- unsigned component_mask = (1 << components) - 1;
- unsigned stream_id = linked_xfb_info->Outputs[i].StreamId;
- unsigned decl_buffer_slot = buffer << SO_DECL_OUTPUT_BUFFER_SLOT_SHIFT;
- assert(stream_id < MAX_VERTEX_STREAMS);
-
- /* gl_PointSize is stored in VARYING_SLOT_PSIZ.w
- * gl_Layer is stored in VARYING_SLOT_PSIZ.y
- * gl_ViewportIndex is stored in VARYING_SLOT_PSIZ.z
- */
- if (varying == VARYING_SLOT_PSIZ) {
- assert(components == 1);
- component_mask <<= 3;
- } else if (varying == VARYING_SLOT_LAYER) {
- assert(components == 1);
- component_mask <<= 1;
- } else if (varying == VARYING_SLOT_VIEWPORT) {
- assert(components == 1);
- component_mask <<= 2;
- } else {
- component_mask <<= linked_xfb_info->Outputs[i].ComponentOffset;
- }
-
- buffer_mask[stream_id] |= 1 << buffer;
-
- decl |= decl_buffer_slot;
- if (varying == VARYING_SLOT_LAYER || varying == VARYING_SLOT_VIEWPORT) {
- decl |= vue_map->varying_to_slot[VARYING_SLOT_PSIZ] <<
- SO_DECL_REGISTER_INDEX_SHIFT;
- } else {
- assert(vue_map->varying_to_slot[varying] >= 0);
- decl |= vue_map->varying_to_slot[varying] <<
- SO_DECL_REGISTER_INDEX_SHIFT;
- }
- decl |= component_mask << SO_DECL_COMPONENT_MASK_SHIFT;
-
- /* Mesa doesn't store entries for gl_SkipComponents in the Outputs[]
- * array. Instead, it simply increments DstOffset for the following
- * input by the number of components that should be skipped.
- *
- * Our hardware is unusual in that it requires us to program SO_DECLs
- * for fake "hole" components, rather than simply taking the offset
- * for each real varying. Each hole can have size 1, 2, 3, or 4; we
- * program as many size = 4 holes as we can, then a final hole to
- * accommodate the final 1, 2, or 3 remaining.
- */
- int skip_components =
- linked_xfb_info->Outputs[i].DstOffset - next_offset[buffer];
-
- next_offset[buffer] += skip_components;
-
- while (skip_components >= 4) {
- so_decl[stream_id][decls[stream_id]++] =
- SO_DECL_HOLE_FLAG | 0xf | decl_buffer_slot;
- skip_components -= 4;
- }
- if (skip_components > 0)
- so_decl[stream_id][decls[stream_id]++] =
- SO_DECL_HOLE_FLAG | ((1 << skip_components) - 1) |
- decl_buffer_slot;
-
- assert(linked_xfb_info->Outputs[i].DstOffset == next_offset[buffer]);
-
- next_offset[buffer] += components;
-
- so_decl[stream_id][decls[stream_id]++] = decl;
-
- if (decls[stream_id] > max_decls)
- max_decls = decls[stream_id];
- }
-
- BEGIN_BATCH(max_decls * 2 + 3);
- OUT_BATCH(_3DSTATE_SO_DECL_LIST << 16 | (max_decls * 2 + 1));
-
- OUT_BATCH((buffer_mask[0] << SO_STREAM_TO_BUFFER_SELECTS_0_SHIFT) |
- (buffer_mask[1] << SO_STREAM_TO_BUFFER_SELECTS_1_SHIFT) |
- (buffer_mask[2] << SO_STREAM_TO_BUFFER_SELECTS_2_SHIFT) |
- (buffer_mask[3] << SO_STREAM_TO_BUFFER_SELECTS_3_SHIFT));
-
- OUT_BATCH((decls[0] << SO_NUM_ENTRIES_0_SHIFT) |
- (decls[1] << SO_NUM_ENTRIES_1_SHIFT) |
- (decls[2] << SO_NUM_ENTRIES_2_SHIFT) |
- (decls[3] << SO_NUM_ENTRIES_3_SHIFT));
-
- for (int i = 0; i < max_decls; i++) {
- /* Stream 1 | Stream 0 */
- OUT_BATCH(((uint32_t) so_decl[1][i]) << 16 | so_decl[0][i]);
- /* Stream 3 | Stream 2 */
- OUT_BATCH(((uint32_t) so_decl[3][i]) << 16 | so_decl[2][i]);
- }
-
- ADVANCE_BATCH();
-}
-
-static bool
-query_active(struct gl_query_object *q)
-{
- return q && q->Active;
-}
-
-static void
-upload_3dstate_streamout(struct brw_context *brw, bool active,
- const 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;
- uint32_t dw1 = 0, dw2 = 0, dw3 = 0, dw4 = 0;
- int i;
-
- if (active) {
- const struct gl_transform_feedback_info *linked_xfb_info =
- xfb_obj->program->sh.LinkedTransformFeedback;
- 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;
-
- /* BRW_NEW_RASTERIZER_DISCARD */
- if (ctx->RasterDiscard) {
- if (!query_active(ctx->Query.PrimitivesGenerated[0])) {
- dw1 |= SO_RENDERING_DISABLE;
- } else {
- perf_debug("Rasterizer discard with a GL_PRIMITIVES_GENERATED "
- "query active relies on the clipper.");
- }
- }
-
- /* _NEW_LIGHT */
- if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION)
- dw1 |= SO_REORDER_TRAILING;
-
- if (brw->gen < 8) {
- for (i = 0; i < 4; i++) {
- if (xfb_obj->Buffers[i]) {
- dw1 |= SO_BUFFER_ENABLE(i);
- }
- }
- }
-
- /* 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 |= SET_FIELD(urb_entry_read_offset, SO_STREAM_0_VERTEX_READ_OFFSET);
- dw2 |= SET_FIELD(urb_entry_read_length - 1, SO_STREAM_0_VERTEX_READ_LENGTH);
-
- dw2 |= SET_FIELD(urb_entry_read_offset, SO_STREAM_1_VERTEX_READ_OFFSET);
- dw2 |= SET_FIELD(urb_entry_read_length - 1, SO_STREAM_1_VERTEX_READ_LENGTH);
-
- dw2 |= SET_FIELD(urb_entry_read_offset, SO_STREAM_2_VERTEX_READ_OFFSET);
- dw2 |= SET_FIELD(urb_entry_read_length - 1, SO_STREAM_2_VERTEX_READ_LENGTH);
-
- dw2 |= SET_FIELD(urb_entry_read_offset, SO_STREAM_3_VERTEX_READ_OFFSET);
- dw2 |= SET_FIELD(urb_entry_read_length - 1, SO_STREAM_3_VERTEX_READ_LENGTH);
-
- if (brw->gen >= 8) {
- /* Set buffer pitches; 0 means unbound. */
- if (xfb_obj->Buffers[0])
- dw3 |= linked_xfb_info->Buffers[0].Stride * 4;
- if (xfb_obj->Buffers[1])
- dw3 |= (linked_xfb_info->Buffers[1].Stride * 4) << 16;
- if (xfb_obj->Buffers[2])
- dw4 |= linked_xfb_info->Buffers[2].Stride * 4;
- if (xfb_obj->Buffers[3])
- dw4 |= (linked_xfb_info->Buffers[3].Stride * 4) << 16;
- }
- }
-
- const int dwords = brw->gen >= 8 ? 5 : 3;
-
- BEGIN_BATCH(dwords);
- OUT_BATCH(_3DSTATE_STREAMOUT << 16 | (dwords - 2));
- OUT_BATCH(dw1);
- OUT_BATCH(dw2);
- if (dwords > 3) {
- 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) {
- if (brw->gen >= 8)
- gen8_upload_3dstate_so_buffers(brw);
- else
- upload_3dstate_so_buffers(brw);
-
- /* BRW_NEW_VUE_MAP_GEOM_OUT */
- gen7_upload_3dstate_so_decl_list(brw, &brw->vue_map_geom_out);
- }
-
- /* Finally, set up the SOL stage. This command must always follow updates to
- * the nonpipelined SOL state (3DSTATE_SO_BUFFER, 3DSTATE_SO_DECL_LIST) or
- * MMIO register updates (current performed by the kernel at each batch
- * emit).
- */
- upload_3dstate_streamout(brw, active, &brw->vue_map_geom_out);
-}
-
-const struct brw_tracked_state gen7_sol_state = {
- .dirty = {
- .mesa = _NEW_LIGHT,
- .brw = BRW_NEW_BATCH |
- BRW_NEW_BLORP |
- BRW_NEW_RASTERIZER_DISCARD |
- BRW_NEW_VUE_MAP_GEOM_OUT |
- BRW_NEW_TRANSFORM_FEEDBACK,
- },
- .emit = upload_sol_state,
-};
-
void
gen7_begin_transform_feedback(struct gl_context *ctx, GLenum mode,
struct gl_transform_feedback_object *obj)
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