iris: Implement set_global_binding

All this has to do is track which globals are bound and make sure the
batch references them every time.  We use A64 messages to access them so
there are no binding table entries to manage.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6280>

diff --git a/src/gallium/drivers/iris/iris_context.h b/src/gallium/drivers/iris/iris_context.h
index 361c63cc2adf83491947611ebe1ef4a177f37310..e34e3e93475983a4706d86b8c771e56dcd29d2ec 100644 (file)
--- a/src/gallium/drivers/iris/iris_context.h
+++ b/src/gallium/drivers/iris/iris_context.h
@@ -49,6 +49,7 @@ struct blorp_params;
 #define IRIS_MAX_SSBOS 16
 #define IRIS_MAX_VIEWPORTS 16
 #define IRIS_MAX_CLIP_PLANES 8
+#define IRIS_MAX_GLOBAL_BINDINGS 32
 
 enum iris_param_domain {
    BRW_PARAM_DOMAIN_BUILTIN = 0,
@@ -697,6 +698,9 @@ struct iris_context {
       /** Do any samplers need border color?  One bit per shader stage. */
       uint8_t need_border_colors;
 
+      /** Global resource bindings */
+      struct pipe_resource *global_bindings[IRIS_MAX_GLOBAL_BINDINGS];
+
       struct pipe_stream_output_target *so_target[PIPE_MAX_SO_BUFFERS];
       bool streamout_active;
 

diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index 83fb9d8c39f15d1d9d971b500dbdade04555b655..5837d2193567566ed5b59f7c31c1723e17807436 100644 (file)
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -2853,6 +2853,31 @@ iris_set_compute_resources(struct pipe_context *ctx,
    assert(count == 0);
 }
 
+static void
+iris_set_global_binding(struct pipe_context *ctx,
+                        unsigned start_slot, unsigned count,
+                        struct pipe_resource **resources,
+                        uint32_t **handles)
+{
+   struct iris_context *ice = (struct iris_context *) ctx;
+
+   assert(start_slot + count <= IRIS_MAX_GLOBAL_BINDINGS);
+   for (unsigned i = 0; i < count; i++) {
+      if (resources && resources[i]) {
+         pipe_resource_reference(&ice->state.global_bindings[start_slot + i],
+                                 resources[i]);
+         struct iris_resource *res = (void *) resources[i];
+         uint64_t addr = res->bo->gtt_offset;
+         memcpy(handles[i], &addr, sizeof(addr));
+      } else {
+         pipe_resource_reference(&ice->state.global_bindings[start_slot + i],
+                                 NULL);
+      }
+   }
+
+   ice->state.stage_dirty |= IRIS_STAGE_DIRTY_BINDINGS_CS;
+}
+
 /**
  * The pipe->set_tess_state() driver hook.
  */
@@ -6688,6 +6713,15 @@ iris_upload_gpgpu_walker(struct iris_context *ice,
       }
    }
 
+   for (unsigned i = 0; i < IRIS_MAX_GLOBAL_BINDINGS; i++) {
+      struct pipe_resource *res = ice->state.global_bindings[i];
+      if (!res)
+         continue;
+
+      iris_use_pinned_bo(batch, iris_resource_bo(res),
+                         true, IRIS_DOMAIN_NONE);
+   }
+
    if (stage_dirty & (IRIS_STAGE_DIRTY_SAMPLER_STATES_CS |
                       IRIS_STAGE_DIRTY_BINDINGS_CS |
                       IRIS_STAGE_DIRTY_CONSTANTS_CS |
@@ -7719,6 +7753,7 @@ genX(init_state)(struct iris_context *ice)
    ctx->set_shader_images = iris_set_shader_images;
    ctx->set_sampler_views = iris_set_sampler_views;
    ctx->set_compute_resources = iris_set_compute_resources;
+   ctx->set_global_binding = iris_set_global_binding;
    ctx->set_tess_state = iris_set_tess_state;
    ctx->set_framebuffer_state = iris_set_framebuffer_state;
    ctx->set_polygon_stipple = iris_set_polygon_stipple;