[Mesa-dev] [PATCH 03/27] i965: Enable hardware-generated binding tables on render path.
Pohjolainen, Topi
topi.pohjolainen at intel.com
Thu May 7 06:43:21 PDT 2015
On Tue, Apr 28, 2015 at 11:08:00PM +0300, Abdiel Janulgue wrote:
> This patch implements the binding table enable command which is also
> used to allocate a binding table pool where hardware-generated
> binding table entries are flushed into. Each binding table offset in
> the binding table pool is unique per each shader stage that are
> enabled within a batch.
>
> Also insert the required brw_tracked_state objects to enable
> hw-generated binding tables in normal render path.
>
> Signed-off-by: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
> ---
> src/mesa/drivers/dri/i965/brw_binding_tables.c | 70 ++++++++++++++++++++++++++
> src/mesa/drivers/dri/i965/brw_context.c | 4 ++
> src/mesa/drivers/dri/i965/brw_context.h | 5 ++
> src/mesa/drivers/dri/i965/brw_state.h | 7 +++
> src/mesa/drivers/dri/i965/brw_state_upload.c | 2 +
> src/mesa/drivers/dri/i965/intel_batchbuffer.c | 4 ++
> 6 files changed, 92 insertions(+)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_binding_tables.c b/src/mesa/drivers/dri/i965/brw_binding_tables.c
> index 459165a..a58e32e 100644
> --- a/src/mesa/drivers/dri/i965/brw_binding_tables.c
> +++ b/src/mesa/drivers/dri/i965/brw_binding_tables.c
> @@ -44,6 +44,11 @@
> #include "brw_state.h"
> #include "intel_batchbuffer.h"
>
> +/* Somehow the hw-binding table pool offset must start here, otherwise
> + * the GPU will hang
> + */
> +#define HW_BT_START_OFFSET 256;
I think we want to understand this a little better before enabling...
> +
> /**
> * Upload a shader stage's binding table as indirect state.
> *
> @@ -163,6 +168,71 @@ const struct brw_tracked_state brw_gs_binding_table = {
> .emit = brw_gs_upload_binding_table,
> };
>
> +/**
> + * Hardware-generated binding tables for the resource streamer
> + */
> +void
> +gen7_disable_hw_binding_tables(struct brw_context *brw)
> +{
> + BEGIN_BATCH(3);
> + OUT_BATCH(_3DSTATE_BINDING_TABLE_POOL_ALLOC << 16 | (3 - 2));
> + OUT_BATCH(SET_FIELD(BRW_HW_BINDING_TABLE_OFF, BRW_HW_BINDING_TABLE_ENABLE) |
> + brw->is_haswell ? HSW_HW_BINDING_TABLE_RESERVED : 0);
> + OUT_BATCH(0);
> + ADVANCE_BATCH();
> +
> + /* Pipe control workaround */
> + brw_emit_pipe_control_flush(brw, PIPE_CONTROL_STATE_CACHE_INVALIDATE);
> +}
> +
> +void
> +gen7_enable_hw_binding_tables(struct brw_context *brw)
> +{
> + if (!brw->has_resource_streamer) {
> + gen7_disable_hw_binding_tables(brw);
I started wondering why we really need this - RS is disabled by default and
we haven't needed to do anything to disable it before.
> + return;
> + }
> +
> + if (!brw->hw_bt_pool.bo) {
> + /* From the BSpec, 3D Pipeline > Resource Streamer > Hardware Binding Tables:
> + *
> + * "A maximum of 16,383 Binding tables are allowed in any batch buffer."
> + */
> + int max_size = 16383 * 4;
But does it really need this much all the time? I guess I need to go and
read the spec.
> + brw->hw_bt_pool.bo = drm_intel_bo_alloc(brw->bufmgr, "hw_bt",
> + max_size, 64);
> + brw->hw_bt_pool.next_offset = HW_BT_START_OFFSET;
> + }
> +
> + uint32_t dw1 = SET_FIELD(BRW_HW_BINDING_TABLE_ON, BRW_HW_BINDING_TABLE_ENABLE);
> + if (brw->is_haswell)
> + dw1 |= SET_FIELD(GEN7_MOCS_L3, GEN7_HW_BT_MOCS) | HSW_HW_BINDING_TABLE_RESERVED;
These are overflowing 80 columns.
> +
> + BEGIN_BATCH(3);
> + OUT_BATCH(_3DSTATE_BINDING_TABLE_POOL_ALLOC << 16 | (3 - 2));
> + OUT_RELOC(brw->hw_bt_pool.bo, I915_GEM_DOMAIN_SAMPLER, 0, dw1);
> + OUT_RELOC(brw->hw_bt_pool.bo, I915_GEM_DOMAIN_SAMPLER, 0,
> + brw->hw_bt_pool.bo->size);
> + ADVANCE_BATCH();
> +
> + /* Pipe control workaround */
> + brw_emit_pipe_control_flush(brw, PIPE_CONTROL_STATE_CACHE_INVALIDATE);
Would you have a spec reference for this?
> +}
> +
> +void
> +gen7_reset_rs_pool_offsets(struct brw_context *brw)
> +{
> + brw->hw_bt_pool.next_offset = HW_BT_START_OFFSET;
> +}
> +
> +const struct brw_tracked_state gen7_hw_binding_tables = {
> + .dirty = {
> + .mesa = 0,
> + .brw = BRW_NEW_BATCH,
> + },
> + .emit = gen7_enable_hw_binding_tables
> +};
> +
> /** @} */
>
> /**
> diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
> index c7e1e81..9c7ccae 100644
> --- a/src/mesa/drivers/dri/i965/brw_context.c
> +++ b/src/mesa/drivers/dri/i965/brw_context.c
> @@ -953,6 +953,10 @@ intelDestroyContext(__DRIcontext * driContextPriv)
> if (brw->wm.base.scratch_bo)
> drm_intel_bo_unreference(brw->wm.base.scratch_bo);
>
> + gen7_reset_rs_pool_offsets(brw);
> + drm_intel_bo_unreference(brw->hw_bt_pool.bo);
> + brw->hw_bt_pool.bo = NULL;
> +
> drm_intel_gem_context_destroy(brw->hw_ctx);
>
> if (ctx->swrast_context) {
> diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
> index 07626af..1c72b74 100644
> --- a/src/mesa/drivers/dri/i965/brw_context.h
> +++ b/src/mesa/drivers/dri/i965/brw_context.h
> @@ -1360,6 +1360,11 @@ struct brw_context
> uint32_t fast_clear_op;
> } wm;
>
> + /* RS hardware binding table */
> + struct {
> + drm_intel_bo *bo;
> + uint32_t next_offset;
> + } hw_bt_pool;
>
> struct {
> uint32_t state_offset;
> diff --git a/src/mesa/drivers/dri/i965/brw_state.h b/src/mesa/drivers/dri/i965/brw_state.h
> index cfa67b6..d882bdd 100644
> --- a/src/mesa/drivers/dri/i965/brw_state.h
> +++ b/src/mesa/drivers/dri/i965/brw_state.h
> @@ -130,6 +130,7 @@ extern const struct brw_tracked_state gen7_sol_state;
> extern const struct brw_tracked_state gen7_urb;
> extern const struct brw_tracked_state gen7_vs_state;
> extern const struct brw_tracked_state gen7_wm_state;
> +extern const struct brw_tracked_state gen7_hw_binding_tables;
> extern const struct brw_tracked_state haswell_cut_index;
> extern const struct brw_tracked_state gen8_blend_state;
> extern const struct brw_tracked_state gen8_disable_stages;
> @@ -297,6 +298,12 @@ gen7_upload_constant_state(struct brw_context *brw,
> const struct brw_stage_state *stage_state,
> bool active, unsigned opcode);
>
> +/* gen7_misc_state.c */
> +void gen7_rs_control(struct brw_context *brw, int enable);
> +void gen7_enable_hw_binding_tables(struct brw_context *brw);
> +void gen7_disable_hw_binding_tables(struct brw_context *brw);
> +void gen7_reset_rs_pool_offsets(struct brw_context *brw);
> +
> #ifdef __cplusplus
> }
> #endif
> diff --git a/src/mesa/drivers/dri/i965/brw_state_upload.c b/src/mesa/drivers/dri/i965/brw_state_upload.c
> index ab316bf..e9f3bbd 100644
> --- a/src/mesa/drivers/dri/i965/brw_state_upload.c
> +++ b/src/mesa/drivers/dri/i965/brw_state_upload.c
> @@ -190,6 +190,8 @@ static const struct brw_tracked_state *gen7_render_atoms[] =
> &gen6_color_calc_state, /* must do before cc unit */
> &gen6_depth_stencil_state, /* must do before cc unit */
>
> + &gen7_hw_binding_tables, /* Enable hw-generated binding tables for Haswell */
> +
> &gen6_vs_push_constants, /* Before vs_state */
> &gen6_gs_push_constants, /* Before gs_state */
> &gen6_wm_push_constants, /* Before wm_surfaces and constant_buffer */
> diff --git a/src/mesa/drivers/dri/i965/intel_batchbuffer.c b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
> index bce5830..509e898 100644
> --- a/src/mesa/drivers/dri/i965/intel_batchbuffer.c
> +++ b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
> @@ -32,6 +32,7 @@
> #include "intel_buffers.h"
> #include "intel_fbo.h"
> #include "brw_context.h"
> +#include "brw_state.h"
>
> #include <xf86drm.h>
> #include <i915_drm.h>
> @@ -374,6 +375,9 @@ _intel_batchbuffer_flush(struct brw_context *brw,
> drm_intel_bo_wait_rendering(brw->batch.bo);
> }
>
> + if (brw->gen >= 7)
> + gen7_reset_rs_pool_offsets(brw);
> +
> /* Start a new batch buffer. */
> brw_new_batch(brw);
>
> --
> 1.9.1
>
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