[Mesa-dev] [PATCH 18/20] i965: Program the push constants state using the gather table
Abdiel Janulgue
abdiel.janulgue at linux.intel.com
Fri Sep 11 01:33:32 PDT 2015
Use the gather table generated from the uniform uploads and
ir_binop_ubo_load to gather and pack the constants to the gather pool.
Note that the 3DSTATE_CONSTANT_* packet now refers to the gather
pool generated by the resource streamer instead of the constant buffer
pointed to by an offset of the dynamic state base address.
v2: Support GEN8 + non-trivial rebase.
Signed-off-by: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
---
src/mesa/drivers/dri/i965/brw_state.h | 2 +-
src/mesa/drivers/dri/i965/gen6_gs_state.c | 2 +-
src/mesa/drivers/dri/i965/gen6_vs_state.c | 2 +-
src/mesa/drivers/dri/i965/gen6_wm_state.c | 2 +-
src/mesa/drivers/dri/i965/gen7_vs_state.c | 84 +++++++++++++++++++++++++++----
5 files changed, 79 insertions(+), 13 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_state.h b/src/mesa/drivers/dri/i965/brw_state.h
index c7c7e0b..a1e6c73 100644
--- a/src/mesa/drivers/dri/i965/brw_state.h
+++ b/src/mesa/drivers/dri/i965/brw_state.h
@@ -361,7 +361,7 @@ brw_upload_pull_constants(struct brw_context *brw,
void
gen7_upload_constant_state(struct brw_context *brw,
const struct brw_stage_state *stage_state,
- bool active, unsigned opcode);
+ bool active, unsigned opcode, unsigned gather_op);
void gen7_rs_control(struct brw_context *brw, int enable);
diff --git a/src/mesa/drivers/dri/i965/gen6_gs_state.c b/src/mesa/drivers/dri/i965/gen6_gs_state.c
index eb4c586..79a899e 100644
--- a/src/mesa/drivers/dri/i965/gen6_gs_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_gs_state.c
@@ -48,7 +48,7 @@ gen6_upload_gs_push_constants(struct brw_context *brw)
}
if (brw->gen >= 7)
- gen7_upload_constant_state(brw, stage_state, gp, _3DSTATE_CONSTANT_GS);
+ gen7_upload_constant_state(brw, stage_state, gp, _3DSTATE_CONSTANT_GS, _3DSTATE_GATHER_CONSTANT_GS);
}
const struct brw_tracked_state gen6_gs_push_constants = {
diff --git a/src/mesa/drivers/dri/i965/gen6_vs_state.c b/src/mesa/drivers/dri/i965/gen6_vs_state.c
index d43af5b..bb375b9 100644
--- a/src/mesa/drivers/dri/i965/gen6_vs_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_vs_state.c
@@ -174,7 +174,7 @@ gen6_upload_vs_push_constants(struct brw_context *brw)
gen7_emit_vs_workaround_flush(brw);
gen7_upload_constant_state(brw, stage_state, true /* active */,
- _3DSTATE_CONSTANT_VS);
+ _3DSTATE_CONSTANT_VS, _3DSTATE_GATHER_CONSTANT_VS);
}
}
diff --git a/src/mesa/drivers/dri/i965/gen6_wm_state.c b/src/mesa/drivers/dri/i965/gen6_wm_state.c
index d1748ba..c7b37c6 100644
--- a/src/mesa/drivers/dri/i965/gen6_wm_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_wm_state.c
@@ -51,7 +51,7 @@ gen6_upload_wm_push_constants(struct brw_context *brw)
if (brw->gen >= 7) {
gen7_upload_constant_state(brw, &brw->wm.base, true,
- _3DSTATE_CONSTANT_PS);
+ _3DSTATE_CONSTANT_PS, _3DSTATE_GATHER_CONSTANT_PS);
}
}
diff --git a/src/mesa/drivers/dri/i965/gen7_vs_state.c b/src/mesa/drivers/dri/i965/gen7_vs_state.c
index b7e4858..cf07658 100644
--- a/src/mesa/drivers/dri/i965/gen7_vs_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_vs_state.c
@@ -28,19 +28,70 @@
#include "program/prog_parameter.h"
#include "program/prog_statevars.h"
#include "intel_batchbuffer.h"
+#include "glsl/glsl_parser_extras.h"
+static void
+gen7_submit_gather_table(struct brw_context* brw,
+ const struct brw_stage_state *stage_state,
+ const struct brw_stage_prog_data *prog_data,
+ unsigned gather_opcode)
+{
+ uint32_t gather_dwords = 3 + prog_data->nr_gather_table;
+
+ /* Ordinary uniforms are assigned to the first constant buffer slot */
+ unsigned cb_valid = 1;
+ /* Assign subsequent constant buffer slots to UBOs if any */
+ cb_valid |= (prog_data->nr_ubo_params > 0) ?
+ (2 << (BRW_UBO_GATHER_INDEX_APPEND + prog_data->max_ubo_const_block)) - 1 : 0;
+
+ assert(cb_valid < 0xffff);
+
+ BEGIN_BATCH(gather_dwords);
+ OUT_BATCH(gather_opcode << 16 | (gather_dwords - 2));
+ OUT_BATCH(SET_FIELD(cb_valid, BRW_GATHER_BUFFER_VALID) |
+ SET_FIELD(BRW_UNIFORM_GATHER_INDEX_START / 16,
+ BRW_GATHER_BINDING_TABLE_BLOCK));
+ OUT_BATCH(stage_state->push_const_offset);
+ for (int i = 0; i < prog_data->nr_gather_table; i++) {
+ /* Which bo are we referring to? The uniform constant buffer or
+ * the UBO block?
+ */
+ bool is_uniform = prog_data->gather_table[i].reg == -1;
+ int cb_offset = is_uniform ? i :
+ (prog_data->gather_table[i].const_offset / 16);
+ int bt_offset = is_uniform ? 0 :
+ (prog_data->gather_table[i].const_block + BRW_UBO_GATHER_INDEX_APPEND);
+
+ assert(cb_offset < 256);
+ assert(bt_offset < 16);
+
+ OUT_BATCH(SET_FIELD(cb_offset, BRW_GATHER_CONST_BUFFER_OFFSET) |
+ SET_FIELD(prog_data->gather_table[i].channel_mask,
+ BRW_GATHER_CHANNEL_MASK) | bt_offset);
+ }
+ ADVANCE_BATCH();
+}
void
gen7_upload_constant_state(struct brw_context *brw,
const struct brw_stage_state *stage_state,
- bool active, unsigned opcode)
+ bool active, unsigned opcode, unsigned gather_opcode)
{
uint32_t mocs = brw->gen < 8 ? GEN7_MOCS_L3 : 0;
/* Disable if the shader stage is inactive or there are no push constants. */
active = active && stage_state->push_const_size != 0;
+ bool use_gather = (brw->gather_pool.bo != NULL);
+
+ int const_loc = use_gather ? 16 : 0;
int dwords = brw->gen >= 8 ? 11 : 7;
+
+ struct brw_stage_prog_data *prog_data = stage_state->prog_data;
+ if (prog_data && use_gather && active) {
+ gen7_submit_gather_table(brw, stage_state, prog_data, gather_opcode);
+ }
+
BEGIN_BATCH(dwords);
OUT_BATCH(opcode << 16 | (dwords - 2));
@@ -59,10 +110,9 @@ gen7_upload_constant_state(struct brw_context *brw,
OUT_BATCH(0);
OUT_BATCH(stage_state->push_const_size);
} else {
- OUT_BATCH(active ? stage_state->push_const_size : 0);
+ OUT_BATCH(active ? stage_state->push_const_size << const_loc : 0);
OUT_BATCH(0);
}
-
/* Pointer to the constant buffer. Covered by the set of state flags
* from gen6_prepare_wm_contants
*/
@@ -79,23 +129,39 @@ gen7_upload_constant_state(struct brw_context *brw,
OUT_BATCH(0);
OUT_BATCH(0);
} else if (brw->gen>= 8) {
- OUT_BATCH(active ? (stage_state->push_const_offset | mocs) : 0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
+ if (use_gather) {
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ OUT_BATCH(active ? (stage_state->push_const_offset | mocs) : 0);
+ OUT_BATCH(0);
+ } else {
+ OUT_BATCH(active ? (stage_state->push_const_offset | mocs) : 0);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ }
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
} else {
- OUT_BATCH(active ? (stage_state->push_const_offset | mocs) : 0);
- OUT_BATCH(0);
+ if (use_gather) {
+ OUT_BATCH(0);
+ OUT_BATCH(active ? (stage_state->push_const_offset | mocs) : 0);
+ } else {
+ OUT_BATCH(active ? (stage_state->push_const_offset | mocs) : 0);
+ OUT_BATCH(0);
+ }
OUT_BATCH(0);
OUT_BATCH(0);
}
ADVANCE_BATCH();
+ /* Re-enable gather again if required */
+ if (gather_switched_off)
+ gen7_toggle_gather_constants(brw, true);
+
/* On SKL+ the new constants don't take effect until the next corresponding
* 3DSTATE_BINDING_TABLE_POINTER_* command is parsed so we need to ensure
* that is sent
--
1.9.1
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