[Mesa-dev] [PATCH 19/33] intel/blorp: Rework alloc_binding_table

[Jason Ekstrand]

The original blorp_alloc_binding_table helper was supposed to return the
binding table offset and map along with the surface state maps.  This isn't
quite what we want, however.  What we really want is the binding table
offsets, surface state offsets, and surface state maps.  In the GL driver,
the binding table map *is* an array of surface state offsets.  However, in
Vulkan, this isn't quite true as the entries in the binding table are
surface state offsets combined with another binding table block offset.
---
 src/intel/blorp/blorp_genX_exec.h           | 10 +++++-----
 src/mesa/drivers/dri/i965/genX_blorp_exec.c | 11 ++++++-----
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/intel/blorp/blorp_genX_exec.h b/src/intel/blorp/blorp_genX_exec.h
index 1129929..ff89865 100644
--- a/src/intel/blorp/blorp_genX_exec.h
+++ b/src/intel/blorp/blorp_genX_exec.h
@@ -60,7 +60,7 @@ blorp_alloc_vertex_buffer(struct blorp_batch *batch, uint32_t size,
 static void
 blorp_alloc_binding_table(struct blorp_batch *batch, unsigned num_entries,
                           unsigned state_size, unsigned state_alignment,
-                          uint32_t *bt_offset, uint32_t **bt_map,
+                          uint32_t *bt_offset, uint32_t *surface_offsets,
                           void **surface_maps);
 static void
 blorp_surface_reloc(struct blorp_batch *batch, uint32_t ss_offset,
@@ -928,7 +928,7 @@ static void
 blorp_emit_surface_states(struct blorp_batch *batch,
                           const struct blorp_params *params)
 {
-   uint32_t bind_offset, *bind_map;
+   uint32_t bind_offset, surface_offsets[2];
    void *surface_maps[2];
 
    const unsigned ss_size = GENX(RENDER_SURFACE_STATE_length) * 4;
@@ -936,15 +936,15 @@ blorp_emit_surface_states(struct blorp_batch *batch,
 
    unsigned num_surfaces = 1 + (params->src.addr.buffer != NULL);
    blorp_alloc_binding_table(batch, num_surfaces, ss_size, ss_align,
-                             &bind_offset, &bind_map, surface_maps);
+                             &bind_offset, surface_offsets, surface_maps);
 
    blorp_emit_surface_state(batch, &params->dst,
                             surface_maps[BLORP_RENDERBUFFER_BT_INDEX],
-                            bind_map[BLORP_RENDERBUFFER_BT_INDEX], true);
+                            surface_offsets[BLORP_RENDERBUFFER_BT_INDEX], true);
    if (params->src.addr.buffer) {
       blorp_emit_surface_state(batch, &params->src,
                                surface_maps[BLORP_TEXTURE_BT_INDEX],
-                               bind_map[BLORP_TEXTURE_BT_INDEX], false);
+                               surface_offsets[BLORP_TEXTURE_BT_INDEX], false);
    }
 
 #if GEN_GEN >= 7
diff --git a/src/mesa/drivers/dri/i965/genX_blorp_exec.c b/src/mesa/drivers/dri/i965/genX_blorp_exec.c
index 2e62c70..47d509d 100644
--- a/src/mesa/drivers/dri/i965/genX_blorp_exec.c
+++ b/src/mesa/drivers/dri/i965/genX_blorp_exec.c
@@ -104,20 +104,21 @@ blorp_alloc_dynamic_state(struct blorp_batch *batch,
 static void
 blorp_alloc_binding_table(struct blorp_batch *batch, unsigned num_entries,
                           unsigned state_size, unsigned state_alignment,
-                          uint32_t *bt_offset, uint32_t **bt_map,
+                          uint32_t *bt_offset, uint32_t *surface_offsets,
                           void **surface_maps)
 {
    assert(batch->blorp->driver_ctx == batch->driver_batch);
    struct brw_context *brw = batch->driver_batch;
 
-   *bt_map = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE,
-                             num_entries * sizeof(uint32_t), 32,
-                             bt_offset);
+   uint32_t *bt_map = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE,
+                                      num_entries * sizeof(uint32_t), 32,
+                                      bt_offset);
 
    for (unsigned i = 0; i < num_entries; i++) {
       surface_maps[i] = brw_state_batch(brw, AUB_TRACE_SURFACE_STATE,
                                         state_size, state_alignment,
-                                        &(*bt_map)[i]);
+                                        &(surface_offsets)[i]);
+      bt_map[i] = surface_offsets[i];
    }
 }
 
-- 
2.5.0.400.gff86faf