#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->shader_program->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_intel_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->BufferStride[i] * 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->shader_program->LinkedTransformFeedback;
- uint16_t so_decl[128];
- int buffer_mask = 0;
- int next_offset[4] = {0, 0, 0, 0};
- int decls = 0;
-
- STATIC_ASSERT(ARRAY_SIZE(so_decl) >= MAX_PROGRAM_OUTPUTS);
-
- /* 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 (int 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;
-
- /* gl_PointSize is stored in VARYING_SLOT_PSIZ.w. */
- if (varying == VARYING_SLOT_PSIZ) {
- assert(components == 1);
- component_mask <<= 3;
- } else {
- component_mask <<= linked_xfb_info->Outputs[i].ComponentOffset;
- }
-
- buffer_mask |= 1 << buffer;
-
- decl |= buffer << SO_DECL_OUTPUT_BUFFER_SLOT_SHIFT;
- 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
- * accomodate 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[decls++] = SO_DECL_HOLE_FLAG | 0xf;
- skip_components -= 4;
- }
- if (skip_components > 0)
- so_decl[decls++] = SO_DECL_HOLE_FLAG | ((1 << skip_components) - 1);
-
- assert(linked_xfb_info->Outputs[i].DstOffset == next_offset[buffer]);
-
- next_offset[buffer] += components;
-
- so_decl[decls++] = decl;
- }
-
- BEGIN_BATCH(decls * 2 + 3);
- OUT_BATCH(_3DSTATE_SO_DECL_LIST << 16 | (decls * 2 + 1));
-
- OUT_BATCH((buffer_mask << SO_STREAM_TO_BUFFER_SELECTS_0_SHIFT) |
- (0 << SO_STREAM_TO_BUFFER_SELECTS_1_SHIFT) |
- (0 << SO_STREAM_TO_BUFFER_SELECTS_2_SHIFT) |
- (0 << SO_STREAM_TO_BUFFER_SELECTS_3_SHIFT));
-
- OUT_BATCH((decls << SO_NUM_ENTRIES_0_SHIFT) |
- (0 << SO_NUM_ENTRIES_1_SHIFT) |
- (0 << SO_NUM_ENTRIES_2_SHIFT) |
- (0 << SO_NUM_ENTRIES_3_SHIFT));
-
- for (int i = 0; i < decls; i++) {
- OUT_BATCH(so_decl[i]);
- OUT_BATCH(0);
- }
-
- ADVANCE_BATCH();
-}
-
-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;
- int i;
-
- 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;
-
- 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 |= urb_entry_read_offset << SO_STREAM_0_VERTEX_READ_OFFSET_SHIFT;
- dw2 |= (urb_entry_read_length - 1) <<
- SO_STREAM_0_VERTEX_READ_LENGTH_SHIFT;
- }
-
- BEGIN_BATCH(3);
- OUT_BATCH(_3DSTATE_STREAMOUT << 16 | (3 - 2));
- OUT_BATCH(dw1);
- OUT_BATCH(dw2);
- 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) {
- 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_VUE_MAP_GEOM_OUT |
- BRW_NEW_TRANSFORM_FEEDBACK)
- },
- .emit = upload_sol_state,
-};
-
-/**
- * Tally the number of primitives generated so far.
- *
- * The buffer contains a series of pairs:
- * (<start0, start1, start2, start3>, <end0, end1, end2, end3>) ;
- * (<start0, start1, start2, start3>, <end0, end1, end2, end3>) ;
- *
- * For each stream, we subtract the pair of values (end - start) to get the
- * number of primitives generated during one section. We accumulate these
- * values, adding them up to get the total number of primitives generated.
- */
-static void
-gen7_tally_prims_generated(struct brw_context *brw,
- struct brw_transform_feedback_object *obj)
-{
- /* If the current batch is still contributing to the number of primitives
- * generated, flush it now so the results will be present when mapped.
- */
- if (drm_intel_bo_references(brw->batch.bo, obj->prim_count_bo))
- intel_batchbuffer_flush(brw);
-
- if (unlikely(brw->perf_debug && drm_intel_bo_busy(obj->prim_count_bo)))
- perf_debug("Stalling for # of transform feedback primitives written.\n");
-
- drm_intel_bo_map(obj->prim_count_bo, false);
- uint64_t *prim_counts = obj->prim_count_bo->virtual;
-
- assert(obj->prim_count_buffer_index % (2 * BRW_MAX_XFB_STREAMS) == 0);
- int pairs = obj->prim_count_buffer_index / (2 * BRW_MAX_XFB_STREAMS);
-
- for (int i = 0; i < pairs; i++) {
- for (int s = 0; s < BRW_MAX_XFB_STREAMS; s++) {
- obj->prims_generated[s] +=
- prim_counts[BRW_MAX_XFB_STREAMS + s] - prim_counts[s];
- }
- prim_counts += 2 * BRW_MAX_XFB_STREAMS; /* move to the next pair */
- }
-
- drm_intel_bo_unmap(obj->prim_count_bo);
-
- /* We've already gathered up the old data; we can safely overwrite it now. */
- obj->prim_count_buffer_index = 0;
-}
-
-/**
- * Store the SO_NUM_PRIMS_WRITTEN counters for each stream (4 uint64_t values)
- * to prim_count_bo.
- *
- * If prim_count_bo is out of space, gather up the results so far into
- * prims_generated[] and allocate a new buffer with enough space.
- *
- * The number of primitives written is used to compute the number of vertices
- * written to a transform feedback stream, which is required to implement
- * DrawTransformFeedback().
- */
-static void
-gen7_save_primitives_written_counters(struct brw_context *brw,
- struct brw_transform_feedback_object *obj)
-{
- const int streams = BRW_MAX_XFB_STREAMS;
-
- /* Check if there's enough space for a new pair of four values. */
- if (obj->prim_count_bo != NULL &&
- obj->prim_count_buffer_index + 2 * streams >= 4096 / sizeof(uint64_t)) {
- /* Gather up the results so far and release the BO. */
- gen7_tally_prims_generated(brw, obj);
- }
-
- /* Flush any drawing so that the counters have the right values. */
- intel_batchbuffer_emit_mi_flush(brw);
-
- /* Emit MI_STORE_REGISTER_MEM commands to write the values. */
- for (int i = 0; i < streams; i++) {
- brw_store_register_mem64(brw, obj->prim_count_bo,
- GEN7_SO_NUM_PRIMS_WRITTEN(i),
- obj->prim_count_buffer_index + i);
- }
-
- /* Update where to write data to. */
- obj->prim_count_buffer_index += streams;
-}
-
-/**
- * Compute the number of vertices written by this transform feedback operation.
- */
-static void
-brw_compute_xfb_vertices_written(struct brw_context *brw,
- struct brw_transform_feedback_object *obj)
-{
- if (obj->vertices_written_valid || !obj->base.EndedAnytime)
- return;
-
- unsigned vertices_per_prim = 0;
-
- switch (obj->primitive_mode) {
- case GL_POINTS:
- vertices_per_prim = 1;
- break;
- case GL_LINES:
- vertices_per_prim = 2;
- break;
- case GL_TRIANGLES:
- vertices_per_prim = 3;
- break;
- default:
- assert(!"Invalid transform feedback primitive mode.");
- }
-
- /* Get the number of primitives generated. */
- gen7_tally_prims_generated(brw, obj);
-
- for (int i = 0; i < BRW_MAX_XFB_STREAMS; i++) {
- obj->vertices_written[i] = vertices_per_prim * obj->prims_generated[i];
- }
- obj->vertices_written_valid = true;
-}
-
-/**
- * GetTransformFeedbackVertexCount() driver hook.
- *
- * Returns the number of vertices written to a particular stream by the last
- * Begin/EndTransformFeedback block. Used to implement DrawTransformFeedback().
- */
-GLsizei
-brw_get_transform_feedback_vertex_count(struct gl_context *ctx,
- struct gl_transform_feedback_object *obj,
- GLuint stream)
-{
- struct brw_context *brw = brw_context(ctx);
- struct brw_transform_feedback_object *brw_obj =
- (struct brw_transform_feedback_object *) obj;
-
- assert(obj->EndedAnytime);
- assert(stream < BRW_MAX_XFB_STREAMS);
-
- brw_compute_xfb_vertices_written(brw, brw_obj);
- return brw_obj->vertices_written[stream];
-}
-
void
gen7_begin_transform_feedback(struct gl_context *ctx, GLenum mode,
struct gl_transform_feedback_object *obj)
struct brw_transform_feedback_object *brw_obj =
(struct brw_transform_feedback_object *) obj;
- /* Reset the SO buffer offsets to 0. */
- if (brw->gen >= 8) {
- brw_obj->zero_offsets = true;
- } else {
- intel_batchbuffer_flush(brw);
- brw->batch.needs_sol_reset = true;
- }
+ assert(brw->gen == 7);
/* We're about to lose the information needed to compute the number of
* vertices written during the last Begin/EndTransformFeedback section,
}
/* Store the starting value of the SO_NUM_PRIMS_WRITTEN counters. */
- gen7_save_primitives_written_counters(brw, brw_obj);
+ brw_save_primitives_written_counters(brw, brw_obj);
+
+ /* Reset the SO buffer offsets to 0. */
+ if (!can_do_pipelined_register_writes(brw->screen)) {
+ intel_batchbuffer_flush(brw);
+ brw->batch.needs_sol_reset = true;
+ } else {
+ for (int i = 0; i < 4; i++) {
+ BEGIN_BATCH(3);
+ OUT_BATCH(MI_LOAD_REGISTER_IMM | (3 - 2));
+ OUT_BATCH(GEN7_SO_WRITE_OFFSET(i));
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+ }
+ }
brw_obj->primitive_mode = mode;
}
(struct brw_transform_feedback_object *) obj;
/* Store the ending value of the SO_NUM_PRIMS_WRITTEN counters. */
- gen7_save_primitives_written_counters(brw, brw_obj);
+ if (!obj->Paused)
+ brw_save_primitives_written_counters(brw, brw_obj);
/* EndTransformFeedback() means that we need to update the number of
* vertices written. Since it's only necessary if DrawTransformFeedback()
(struct brw_transform_feedback_object *) obj;
/* Flush any drawing so that the counters have the right values. */
- intel_batchbuffer_emit_mi_flush(brw);
+ brw_emit_mi_flush(brw);
+
+ assert(brw->gen == 7);
/* Save the SOL buffer offset register values. */
- if (brw->gen < 8) {
- for (int i = 0; i < 4; i++) {
- BEGIN_BATCH(3);
- OUT_BATCH(MI_STORE_REGISTER_MEM | (3 - 2));
- OUT_BATCH(GEN7_SO_WRITE_OFFSET(i));
- OUT_RELOC(brw_obj->offset_bo,
- I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
- i * sizeof(uint32_t));
- ADVANCE_BATCH();
- }
+ for (int i = 0; i < 4; i++) {
+ BEGIN_BATCH(3);
+ OUT_BATCH(MI_STORE_REGISTER_MEM | (3 - 2));
+ OUT_BATCH(GEN7_SO_WRITE_OFFSET(i));
+ OUT_RELOC(brw_obj->offset_bo,
+ I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+ i * sizeof(uint32_t));
+ ADVANCE_BATCH();
}
/* Store the temporary ending value of the SO_NUM_PRIMS_WRITTEN counters.
* occur, which will contribute to the counters. We need to exclude that
* from our counts.
*/
- gen7_save_primitives_written_counters(brw, brw_obj);
+ brw_save_primitives_written_counters(brw, brw_obj);
}
void
struct brw_transform_feedback_object *brw_obj =
(struct brw_transform_feedback_object *) obj;
+ assert(brw->gen == 7);
+
/* Reload the SOL buffer offset registers. */
- if (brw->gen < 8) {
- for (int i = 0; i < 4; i++) {
- BEGIN_BATCH(3);
- OUT_BATCH(GEN7_MI_LOAD_REGISTER_MEM | (3 - 2));
- OUT_BATCH(GEN7_SO_WRITE_OFFSET(i));
- OUT_RELOC(brw_obj->offset_bo,
- I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
- i * sizeof(uint32_t));
- ADVANCE_BATCH();
- }
+ for (int i = 0; i < 4; i++) {
+ BEGIN_BATCH(3);
+ OUT_BATCH(GEN7_MI_LOAD_REGISTER_MEM | (3 - 2));
+ OUT_BATCH(GEN7_SO_WRITE_OFFSET(i));
+ OUT_RELOC(brw_obj->offset_bo,
+ I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+ i * sizeof(uint32_t));
+ ADVANCE_BATCH();
}
/* Store the new starting value of the SO_NUM_PRIMS_WRITTEN counters. */
- gen7_save_primitives_written_counters(brw, brw_obj);
+ brw_save_primitives_written_counters(brw, brw_obj);
}
projects / mesa.git / blobdiff