From 76b8758253fc640616bb00d47a0362353cba4ada Mon Sep 17 00:00:00 2001
From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Mon, 15 May 2017 14:15:40 +0200
Subject: [PATCH] st/mesa: make bindless samplers/images bound to units
 resident
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Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
---
 src/mesa/state_tracker/st_atom_constbuf.c |  6 ++
 src/mesa/state_tracker/st_texture.c       | 94 +++++++++++++++++++++++
 src/mesa/state_tracker/st_texture.h       |  8 ++
 3 files changed, 108 insertions(+)

diff --git a/src/mesa/state_tracker/st_atom_constbuf.c b/src/mesa/state_tracker/st_atom_constbuf.c
index 0c669940660..e4b585101da 100644
--- a/src/mesa/state_tracker/st_atom_constbuf.c
+++ b/src/mesa/state_tracker/st_atom_constbuf.c
@@ -80,6 +80,12 @@ void st_upload_constants(struct st_context *st, struct gl_program *prog)
       }
    }
 
+   /* Make all bindless samplers/images bound texture/image units resident in
+    * the context.
+    */
+   st_make_bound_samplers_resident(st, prog);
+   st_make_bound_images_resident(st, prog);
+
    /* update constants */
    if (params && params->NumParameters) {
       struct pipe_constant_buffer cb;
diff --git a/src/mesa/state_tracker/st_texture.c b/src/mesa/state_tracker/st_texture.c
index 0f72eb778ad..9de3b9a2e9b 100644
--- a/src/mesa/state_tracker/st_texture.c
+++ b/src/mesa/state_tracker/st_texture.c
@@ -540,3 +540,97 @@ st_create_image_handle_from_unit(struct st_context *st,
 
    return pipe->create_image_handle(pipe, &img);
 }
+
+
+/**
+ * Make all bindless samplers bound to texture units resident in the context.
+ */
+void
+st_make_bound_samplers_resident(struct st_context *st,
+                                struct gl_program *prog)
+{
+   enum pipe_shader_type shader = st_shader_stage_to_ptarget(prog->info.stage);
+   struct st_bound_handles *bound_handles = &st->bound_texture_handles[shader];
+   struct pipe_context *pipe = st->pipe;
+   GLuint64 handle;
+   int i;
+
+   /* Remove previous bound texture handles for this stage. */
+   st_destroy_bound_texture_handles_per_stage(st, shader);
+
+   if (likely(!prog->sh.HasBoundBindlessSampler))
+      return;
+
+   for (i = 0; i < prog->sh.NumBindlessSamplers; i++) {
+      struct gl_bindless_sampler *sampler = &prog->sh.BindlessSamplers[i];
+
+      if (!sampler->bound)
+         continue;
+
+      /* Request a new texture handle from the driver and make it resident. */
+      handle = st_create_texture_handle_from_unit(st, prog, sampler->unit);
+      if (!handle)
+         continue;
+
+      pipe->make_texture_handle_resident(st->pipe, handle, true);
+
+      /* Overwrite the texture unit value by the resident handle before
+       * uploading the constant buffer.
+       */
+      *(uint64_t *)sampler->data = handle;
+
+      /* Store the handle in the context. */
+      bound_handles->handles = (uint64_t *)
+         realloc(bound_handles->handles,
+                 (bound_handles->num_handles + 1) * sizeof(uint64_t));
+      bound_handles->handles[bound_handles->num_handles] = handle;
+      bound_handles->num_handles++;
+   }
+}
+
+
+/**
+ * Make all bindless images bound to image units resident in the context.
+ */
+void
+st_make_bound_images_resident(struct st_context *st,
+                              struct gl_program *prog)
+{
+   enum pipe_shader_type shader = st_shader_stage_to_ptarget(prog->info.stage);
+   struct st_bound_handles *bound_handles = &st->bound_image_handles[shader];
+   struct pipe_context *pipe = st->pipe;
+   GLuint64 handle;
+   int i;
+
+   /* Remove previous bound image handles for this stage. */
+   st_destroy_bound_image_handles_per_stage(st, shader);
+
+   if (likely(!prog->sh.HasBoundBindlessImage))
+      return;
+
+   for (i = 0; i < prog->sh.NumBindlessImages; i++) {
+      struct gl_bindless_image *image = &prog->sh.BindlessImages[i];
+
+      if (!image->bound)
+         continue;
+
+      /* Request a new image handle from the driver and make it resident. */
+      handle = st_create_image_handle_from_unit(st, prog, image->unit);
+      if (!handle)
+         continue;
+
+      pipe->make_image_handle_resident(st->pipe, handle, GL_READ_WRITE, true);
+
+      /* Overwrite the image unit value by the resident handle before uploading
+       * the constant buffer.
+       */
+      *(uint64_t *)image->data = handle;
+
+      /* Store the handle in the context. */
+      bound_handles->handles = (uint64_t *)
+         realloc(bound_handles->handles,
+                 (bound_handles->num_handles + 1) * sizeof(uint64_t));
+      bound_handles->handles[bound_handles->num_handles] = handle;
+      bound_handles->num_handles++;
+   }
+}
diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
index 18b5870b393..450d940e76e 100644
--- a/src/mesa/state_tracker/st_texture.h
+++ b/src/mesa/state_tracker/st_texture.h
@@ -293,4 +293,12 @@ st_update_single_texture(struct st_context *st,
                          struct pipe_sampler_view **sampler_view,
                          GLuint texUnit, unsigned glsl_version);
 
+void
+st_make_bound_samplers_resident(struct st_context *st,
+                                struct gl_program *prog);
+
+void
+st_make_bound_images_resident(struct st_context *st,
+                              struct gl_program *prog);
+
 #endif
-- 
2.30.2