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author | Kenneth Graunke <kenneth@whitecape.org> | 2012-12-04 14:45:19 -0800 |
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committer | Kenneth Graunke <kenneth@whitecape.org> | 2014-01-31 17:50:07 -0800 |
commit | 990aaf87c4740e0225db9f4395541938571727cd (patch) | |
tree | 6e3691a88fa3258be4f12a748a87c7af99e0040e /src/mesa/drivers/dri/i965/gen8_sol_state.c | |
parent | fd91ab662d64746ceaddc6de9c5d684ac725799f (diff) | |
download | external_mesa3d-990aaf87c4740e0225db9f4395541938571727cd.zip external_mesa3d-990aaf87c4740e0225db9f4395541938571727cd.tar.gz external_mesa3d-990aaf87c4740e0225db9f4395541938571727cd.tar.bz2 |
i965: Update SOL state for Broadwell.
Unlike on Gen7, we can directly set the offset via the state packet.
We also -have- to: the kernel SOL reset code won't work anymore.
v2: Fix copy and paste mistake in buffer stride setup; drop stale
comment (caught by Eric Anholt). Add a perf_debug for missing
MOCS setup.
v3: Rebase on Paul Berry's changes to CurrentVertexProgram.
v4: Fix SO Write Offset handling. We need to set bits 20 and 21 so the
hardware both loads and saves the offset. There's also a
restriction that 3DSTATE_SO_BUFFER can only be programmed once per
buffer between primitives, so the "reset to zero" code needed
reworking. Fixes most of the transform feedback Piglit tests.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net> [v2]
Diffstat (limited to 'src/mesa/drivers/dri/i965/gen8_sol_state.c')
-rw-r--r-- | src/mesa/drivers/dri/i965/gen8_sol_state.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/gen8_sol_state.c b/src/mesa/drivers/dri/i965/gen8_sol_state.c new file mode 100644 index 0000000..35a77ac --- /dev/null +++ b/src/mesa/drivers/dri/i965/gen8_sol_state.c @@ -0,0 +1,179 @@ +/* + * 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); + 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_VERTEX_PROGRAM */ + const struct gl_shader_program *vs_prog = + ctx->Shader.CurrentProgram[MESA_SHADER_VERTEX]; + /* BRW_NEW_TRANSFORM_FEEDBACK */ + const struct gl_transform_feedback_info *linked_xfb_info = + &vs_prog->LinkedTransformFeedback; + struct gl_transform_feedback_object *xfb_obj = + ctx->TransformFeedback.CurrentObject; + 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_RASTERIZER_DISCARD | + BRW_NEW_TRANSFORM_FEEDBACK | + BRW_NEW_VERTEX_PROGRAM | + BRW_NEW_VUE_MAP_GEOM_OUT, + .cache = 0, + }, + .emit = upload_sol_state, +}; |