i965: Add a "write" parameter to intel_bufferobj_buffer.

This doesn't do anything yet, but soon we'll want to know whether an
access to a buffer section may write that data, or simply reads it.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

9 files changed, 26 insertions, 19 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_compute.c b/src/mesa/drivers/dri/i965/brw_compute.c
index 2867a142f13..d6cb0161f40 100644
--- a/src/mesa/drivers/dri/i965/brw_compute.c
+++ b/src/mesa/drivers/dri/i965/brw_compute.c
@@ -263,7 +263,7 @@ brw_dispatch_compute_indirect(struct gl_context *ctx, GLintptr indirect)
    struct brw_bo *bo =
       intel_bufferobj_buffer(brw,
                              intel_buffer_object(indirect_buffer),
-                             indirect, 3 * sizeof(GLuint));
+                             indirect, 3 * sizeof(GLuint), false);
 
    brw->compute.num_work_groups_bo = bo;
    brw->compute.num_work_groups_offset = indirect;
diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index 2ac35032c94..182a140339b 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -222,7 +222,7 @@ brw_emit_prim(struct brw_context *brw,
       struct gl_buffer_object *indirect_buffer = brw->ctx.DrawIndirectBuffer;
       struct brw_bo *bo = intel_bufferobj_buffer(brw,
             intel_buffer_object(indirect_buffer),
-            prim->indirect_offset, 5 * sizeof(GLuint));
+            prim->indirect_offset, 5 * sizeof(GLuint), false);
 
       indirect_flag = GEN7_3DPRIM_INDIRECT_PARAMETER_ENABLE;
 
diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c
index baa1de353b4..5b56aaf1862 100644
--- a/src/mesa/drivers/dri/i965/brw_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c
@@ -622,7 +622,8 @@ brw_prepare_vertices(struct brw_context *brw)
       const uint32_t start = buffer_range_start[i];
       const uint32_t range = buffer_range_end[i] - buffer_range_start[i];
 
-      buffer->bo = intel_bufferobj_buffer(brw, enabled_buffer[i], start, range);
+      buffer->bo = intel_bufferobj_buffer(brw, enabled_buffer[i], start,
+                                          range, false);
       brw_bo_reference(buffer->bo);
    }
 
@@ -739,7 +740,7 @@ brw_upload_indices(struct brw_context *brw)
 
       struct brw_bo *bo =
          intel_bufferobj_buffer(brw, intel_buffer_object(bufferobj),
-                                offset, ib_size);
+                                offset, ib_size, false);
       if (bo != brw->ib.bo) {
          brw_bo_unreference(brw->ib.bo);
          brw->ib.bo = bo;
diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 3615c1805ec..d4960a01cbd 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -698,7 +698,8 @@ brw_update_buffer_texture_surface(struct gl_context *ctx,
 
    if (intel_obj) {
       size = MIN2(size, intel_obj->Base.Size);
-      bo = intel_bufferobj_buffer(brw, intel_obj, tObj->BufferOffset, size);
+      bo = intel_bufferobj_buffer(brw, intel_obj, tObj->BufferOffset, size,
+                                  false);
    }
 
    /* The ARB_texture_buffer_specification says:
@@ -786,7 +787,8 @@ brw_update_sol_surface(struct brw_context *brw,
    uint32_t offset_bytes = 4 * offset_dwords;
    struct brw_bo *bo = intel_bufferobj_buffer(brw, intel_bo,
                                              offset_bytes,
-                                             buffer_obj->Size - offset_bytes);
+                                             buffer_obj->Size - offset_bytes,
+                                             true);
    uint32_t *surf = brw_state_batch(brw, 6 * 4, 32, out_offset);
    uint32_t pitch_minus_1 = 4*stride_dwords - 1;
    size_t size_dwords = buffer_obj->Size / 4;
@@ -1412,7 +1414,7 @@ brw_upload_ubo_surfaces(struct brw_context *brw, struct gl_program *prog,
          struct brw_bo *bo =
             intel_bufferobj_buffer(brw, intel_bo,
                                    binding->Offset,
-                                   size);
+                                   size, false);
          brw_create_constant_surface(brw, bo, binding->Offset,
                                      size,
                                      &ubo_surf_offsets[i]);
@@ -1437,7 +1439,7 @@ brw_upload_ubo_surfaces(struct brw_context *brw, struct gl_program *prog,
          struct brw_bo *bo =
             intel_bufferobj_buffer(brw, intel_bo,
                                    binding->Offset,
-                                   size);
+                                   size, true);
          brw_create_buffer_surface(brw, bo, binding->Offset,
                                    size,
                                    &ssbo_surf_offsets[i]);
@@ -1509,8 +1511,10 @@ brw_upload_abo_surfaces(struct brw_context *brw,
             &ctx->AtomicBufferBindings[prog->sh.AtomicBuffers[i]->Binding];
          struct intel_buffer_object *intel_bo =
             intel_buffer_object(binding->BufferObject);
-         struct brw_bo *bo = intel_bufferobj_buffer(
-            brw, intel_bo, binding->Offset, intel_bo->Base.Size - binding->Offset);
+         struct brw_bo *bo =
+            intel_bufferobj_buffer(brw, intel_bo, binding->Offset,
+                                   intel_bo->Base.Size - binding->Offset,
+                                   true);
 
          brw_emit_buffer_surface_state(brw, &surf_offsets[i], bo,
                                        binding->Offset, ISL_FORMAT_RAW,
diff --git a/src/mesa/drivers/dri/i965/genX_state_upload.c b/src/mesa/drivers/dri/i965/genX_state_upload.c
index baa296192b3..b6678ec6941 100644
--- a/src/mesa/drivers/dri/i965/genX_state_upload.c
+++ b/src/mesa/drivers/dri/i965/genX_state_upload.c
@@ -3387,7 +3387,7 @@ genX(upload_3dstate_so_buffers)(struct brw_context *brw)
       assert(start % 4 == 0);
       uint32_t end = ALIGN(start + xfb_obj->Size[i], 4);
       struct brw_bo *bo =
-         intel_bufferobj_buffer(brw, bufferobj, start, end - start);
+         intel_bufferobj_buffer(brw, bufferobj, start, end - start, true);
       assert(end <= bo->size);
 
       brw_batch_emit(brw, GENX(3DSTATE_SO_BUFFER), sob) {
diff --git a/src/mesa/drivers/dri/i965/intel_buffer_objects.c b/src/mesa/drivers/dri/i965/intel_buffer_objects.c
index fde6b224cd4..c1ee16c9f68 100644
--- a/src/mesa/drivers/dri/i965/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/i965/intel_buffer_objects.c
@@ -540,7 +540,7 @@ brw_unmap_buffer(struct gl_context *ctx,
 struct brw_bo *
 intel_bufferobj_buffer(struct brw_context *brw,
                        struct intel_buffer_object *intel_obj,
-                       uint32_t offset, uint32_t size)
+                       uint32_t offset, uint32_t size, bool write)
 {
    /* This is needed so that things like transform feedback and texture buffer
     * objects that need a BO but don't want to check that they exist for
@@ -576,8 +576,8 @@ brw_copy_buffer_subdata(struct gl_context *ctx,
    if (size == 0)
       return;
 
-   dst_bo = intel_bufferobj_buffer(brw, intel_dst, write_offset, size);
-   src_bo = intel_bufferobj_buffer(brw, intel_src, read_offset, size);
+   dst_bo = intel_bufferobj_buffer(brw, intel_dst, write_offset, size, true);
+   src_bo = intel_bufferobj_buffer(brw, intel_src, read_offset, size, false);
 
    intel_emit_linear_blit(brw,
 			  dst_bo, write_offset,
diff --git a/src/mesa/drivers/dri/i965/intel_buffer_objects.h b/src/mesa/drivers/dri/i965/intel_buffer_objects.h
index a1bfaa9ebc4..6058d824fee 100644
--- a/src/mesa/drivers/dri/i965/intel_buffer_objects.h
+++ b/src/mesa/drivers/dri/i965/intel_buffer_objects.h
@@ -83,9 +83,10 @@ struct intel_buffer_object
 /* Get the bm buffer associated with a GL bufferobject:
  */
 struct brw_bo *intel_bufferobj_buffer(struct brw_context *brw,
-                                     struct intel_buffer_object *obj,
-                                     uint32_t offset,
-                                     uint32_t size);
+                                      struct intel_buffer_object *obj,
+                                      uint32_t offset,
+                                      uint32_t size,
+                                      bool write);
 
 void intel_upload_data(struct brw_context *brw,
                        const void *data,
diff --git a/src/mesa/drivers/dri/i965/intel_pixel_draw.c b/src/mesa/drivers/dri/i965/intel_pixel_draw.c
index e84e4739df4..519e0596724 100644
--- a/src/mesa/drivers/dri/i965/intel_pixel_draw.c
+++ b/src/mesa/drivers/dri/i965/intel_pixel_draw.c
@@ -109,7 +109,7 @@ do_blit_drawpixels(struct gl_context * ctx,
 				    format, type, 0, 0, 0);
 
    src_buffer = intel_bufferobj_buffer(brw, src, src_offset,
-                                       height * src_stride);
+                                       height * src_stride, false);
 
    struct intel_mipmap_tree *pbo_mt =
       intel_miptree_create_for_bo(brw,
diff --git a/src/mesa/drivers/dri/i965/intel_tex.c b/src/mesa/drivers/dri/i965/intel_tex.c
index 1751f109f77..f6cdb017c7b 100644
--- a/src/mesa/drivers/dri/i965/intel_tex.c
+++ b/src/mesa/drivers/dri/i965/intel_tex.c
@@ -335,7 +335,8 @@ intel_set_texture_storage_for_buffer_object(struct gl_context *ctx,
 
    struct brw_bo *bo = intel_bufferobj_buffer(brw, intel_buffer_obj,
                                              buffer_offset,
-                                             row_stride * image->Height);
+                                             row_stride * image->Height,
+                                             !read_only);
    intel_texobj->mt =
       intel_miptree_create_for_bo(brw, bo,
                                   image->TexFormat,