Mesa (master): iris: Track bound constant buffers

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Module: Mesa
Branch: master
Commit: 00d4019676ee879622fd4dbe0234d6c44de04725
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=00d4019676ee879622fd4dbe0234d6c44de04725

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Tue Apr 16 23:01:41 2019 -0700

iris: Track bound constant buffers

This helps avoid having to iterate over [0, PIPE_MAX_CONSTANT_BUFFERS)
looking to see if any resources are bound.

---

 src/gallium/drivers/iris/iris_context.h | 3 +++
 src/gallium/drivers/iris/iris_state.c   | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/src/gallium/drivers/iris/iris_context.h b/src/gallium/drivers/iris/iris_context.h
index f539ab36196..aa2c43331bf 100644
--- a/src/gallium/drivers/iris/iris_context.h
+++ b/src/gallium/drivers/iris/iris_context.h
@@ -322,6 +322,9 @@ struct iris_shader_state {
    struct iris_sampler_state *samplers[IRIS_MAX_TEXTURE_SAMPLERS];
    struct iris_sampler_view *textures[IRIS_MAX_TEXTURE_SAMPLERS];
 
+   /** Bitfield of which constant buffers are bound (non-null). */
+   uint32_t bound_cbufs;
+
    /** Bitfield of which image views are bound (non-null). */
    uint32_t bound_image_views;
 
diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index 3c3861b7827..d87ef278980 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -2465,6 +2465,8 @@ iris_set_constant_buffer(struct pipe_context *ctx,
    struct iris_const_buffer *cbuf = &shs->constbuf[index];
 
    if (input && input->buffer) {
+      shs->bound_cbufs |= 1u << index;
+
       assert(index > 0);
 
       pipe_resource_reference(&cbuf->data.res, input->buffer);
@@ -2475,6 +2477,7 @@ iris_set_constant_buffer(struct pipe_context *ctx,
 
       upload_ubo_surf_state(ice, cbuf, input->buffer_size);
    } else {
+      shs->bound_cbufs &= ~(1u << index);
       pipe_resource_reference(&cbuf->data.res, NULL);
       pipe_resource_reference(&cbuf->surface_state.res, NULL);
    }