[Mesa-dev] [PATCH 14/14] radeonsi: Allow TES distribution between shader engines.
Bas Nieuwenhuizen
bas at basnieuwenhuizen.nl
Tue May 10 10:53:05 UTC 2016
Setting 028B6C_DISTRIBUTION_MODE to a non-zero value and
either setting 028B6C_NUM_DS_WAVES_PER_SIMD to a non-zero
value or storing a zero control word hang my card.
The R_028B50_VGT_TESS_DISTRIBUTION value is copied from
amdgpu-pro. Smaller values in the ACCUM fields seem to
decrease the performance advantage from this patch, higher
values don't seem to matter.
Signed-off-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
---
src/gallium/drivers/radeonsi/si_state.c | 5 ++++
src/gallium/drivers/radeonsi/si_state_draw.c | 8 ++++++
src/gallium/drivers/radeonsi/si_state_shaders.c | 36 ++++++++++++++-----------
3 files changed, 34 insertions(+), 15 deletions(-)
diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index c4af77e..eb48a9e 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -3787,6 +3787,11 @@ static void si_init_config(struct si_context *sctx)
S_028424_OVERWRITE_COMBINER_WATERMARK(4));
si_pm4_set_reg(pm4, R_028C58_VGT_VERTEX_REUSE_BLOCK_CNTL, 30);
si_pm4_set_reg(pm4, R_028C5C_VGT_OUT_DEALLOC_CNTL, 32);
+ si_pm4_set_reg(pm4, R_028B50_VGT_TESS_DISTRIBUTION,
+ S_028B50_ACCUM_ISOLINE(32) |
+ S_028B50_ACCUM_TRI(11) |
+ S_028B50_ACCUM_QUAD(11) |
+ S_028B50_DONUT_SPLIT(16));
}
if (sctx->b.family == CHIP_STONEY)
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c
index 3150489..7ad9422 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -271,6 +271,14 @@ static unsigned si_get_ia_multi_vgt_param(struct si_context *sctx,
sctx->b.family == CHIP_BONAIRE) &&
sctx->gs_shader.cso)
partial_vs_wave = true;
+
+ /* Needed for 028B6C_DISTRIBUTION_MODE != 0 */
+ if (sctx->b.chip_class >= VI) {
+ if (sctx->gs_shader.cso)
+ partial_es_wave = true;
+ else
+ partial_vs_wave = true;
+ }
}
/* This is a hardware requirement. */
diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 43f4a84..d7ed31d 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -249,7 +249,8 @@ void si_destroy_shader_cache(struct si_screen *sscreen)
/* SHADER STATES */
-static void si_set_tesseval_regs(struct si_shader *shader,
+static void si_set_tesseval_regs(struct si_screen *sscreen,
+ struct si_shader *shader,
struct si_pm4_state *pm4)
{
struct tgsi_shader_info *info = &shader->selector->info;
@@ -257,7 +258,7 @@ static void si_set_tesseval_regs(struct si_shader *shader,
unsigned tes_spacing = info->properties[TGSI_PROPERTY_TES_SPACING];
bool tes_vertex_order_cw = info->properties[TGSI_PROPERTY_TES_VERTEX_ORDER_CW];
bool tes_point_mode = info->properties[TGSI_PROPERTY_TES_POINT_MODE];
- unsigned type, partitioning, topology;
+ unsigned type, partitioning, topology, distribution_mode;
switch (tes_prim_mode) {
case PIPE_PRIM_LINES:
@@ -299,10 +300,13 @@ static void si_set_tesseval_regs(struct si_shader *shader,
else
topology = V_028B6C_OUTPUT_TRIANGLE_CW;
+ distribution_mode = sscreen->b.chip_class >= VI ? 2 : 0;
+
si_pm4_set_reg(pm4, R_028B6C_VGT_TF_PARAM,
S_028B6C_TYPE(type) |
S_028B6C_PARTITIONING(partitioning) |
- S_028B6C_TOPOLOGY(topology));
+ S_028B6C_TOPOLOGY(topology) |
+ S_028B6C_DISTRIBUTION_MODE(distribution_mode));
}
static void si_shader_ls(struct si_shader *shader)
@@ -359,7 +363,7 @@ static void si_shader_hs(struct si_shader *shader)
S_00B42C_SCRATCH_EN(shader->config.scratch_bytes_per_wave > 0));
}
-static void si_shader_es(struct si_shader *shader)
+static void si_shader_es(struct si_screen *sscreen, struct si_shader *shader)
{
struct si_pm4_state *pm4;
unsigned num_user_sgprs;
@@ -402,7 +406,7 @@ static void si_shader_es(struct si_shader *shader)
S_00B32C_SCRATCH_EN(shader->config.scratch_bytes_per_wave > 0));
if (shader->selector->type == PIPE_SHADER_TESS_EVAL)
- si_set_tesseval_regs(shader, pm4);
+ si_set_tesseval_regs(sscreen, shader, pm4);
}
/**
@@ -489,7 +493,8 @@ static void si_shader_gs(struct si_shader *shader)
* If \p gs is non-NULL, it points to the geometry shader for which this shader
* is the copy shader.
*/
-static void si_shader_vs(struct si_shader *shader, struct si_shader *gs)
+static void si_shader_vs(struct si_screen *sscreen, struct si_shader *shader,
+ struct si_shader *gs)
{
struct si_pm4_state *pm4;
unsigned num_user_sgprs;
@@ -583,7 +588,7 @@ static void si_shader_vs(struct si_shader *shader, struct si_shader *gs)
S_028818_VPORT_Z_SCALE_ENA(1) | S_028818_VPORT_Z_OFFSET_ENA(1));
if (shader->selector->type == PIPE_SHADER_TESS_EVAL)
- si_set_tesseval_regs(shader, pm4);
+ si_set_tesseval_regs(sscreen, shader, pm4);
}
static unsigned si_get_ps_num_interp(struct si_shader *ps)
@@ -764,7 +769,8 @@ static void si_shader_ps(struct si_shader *shader)
shader->z_order = V_02880C_EARLY_Z_THEN_LATE_Z;
}
-static void si_shader_init_pm4_state(struct si_shader *shader)
+static void si_shader_init_pm4_state(struct si_screen *sscreen,
+ struct si_shader *shader)
{
if (shader->pm4)
@@ -775,22 +781,22 @@ static void si_shader_init_pm4_state(struct si_shader *shader)
if (shader->key.vs.as_ls)
si_shader_ls(shader);
else if (shader->key.vs.as_es)
- si_shader_es(shader);
+ si_shader_es(sscreen, shader);
else
- si_shader_vs(shader, NULL);
+ si_shader_vs(sscreen, shader, NULL);
break;
case PIPE_SHADER_TESS_CTRL:
si_shader_hs(shader);
break;
case PIPE_SHADER_TESS_EVAL:
if (shader->key.tes.as_es)
- si_shader_es(shader);
+ si_shader_es(sscreen, shader);
else
- si_shader_vs(shader, NULL);
+ si_shader_vs(sscreen, shader, NULL);
break;
case PIPE_SHADER_GEOMETRY:
si_shader_gs(shader);
- si_shader_vs(shader->gs_copy_shader, shader);
+ si_shader_vs(sscreen, shader->gs_copy_shader, shader);
break;
case PIPE_SHADER_FRAGMENT:
si_shader_ps(shader);
@@ -984,7 +990,7 @@ static int si_shader_select_with_key(struct pipe_context *ctx,
pipe_mutex_unlock(sel->mutex);
return r;
}
- si_shader_init_pm4_state(shader);
+ si_shader_init_pm4_state(sctx->screen, shader);
if (!sel->last_variant) {
sel->first_variant = shader;
@@ -1656,7 +1662,7 @@ static int si_update_scratch_buffer(struct si_context *sctx,
return r;
/* Update the shader state to use the new shader bo. */
- si_shader_init_pm4_state(shader);
+ si_shader_init_pm4_state(sctx->screen, shader);
r600_resource_reference(&shader->scratch_bo, sctx->scratch_buffer);
--
2.8.2
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