i965: Add plumbing for Broadwell's auxiliary surface support.

Broadwell generalizes the MCS fields to allow for multiple kinds of
auxiliary surfaces.  This patch adds the plumbing to set those values,
but doesn't yet hook any up.

v2: (by Jordan Justen) Use mt for qpitch; pitch is tiles - 1.
v3: Don't forget to subtract 1 from aux_mt->pitch.
v4: Drop unnecessary aux_mt->offset (caught by Jordan Justen).

Signed-off-by: Kenneth Graunke <[email protected]>
Signed-off-by: Jordan Justen <[email protected]>
Reviewed-by: Ben Widawsky <[email protected]>

1 files changed, 37 insertions, 7 deletions

diff --git a/src/mesa/drivers/dri/i965/gen8_surface_state.c b/src/mesa/drivers/dri/i965/gen8_surface_state.c
index 80ac4f3eda5..0268e5c70a8 100644
--- a/src/mesa/drivers/dri/i965/gen8_surface_state.c
+++ b/src/mesa/drivers/dri/i965/gen8_surface_state.c
@@ -134,6 +134,8 @@ gen8_update_texture_surface(struct gl_context *ctx,
    struct intel_mipmap_tree *mt = intelObj->mt;
    struct gl_texture_image *firstImage = tObj->Image[0][tObj->BaseLevel];
    struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
+   struct intel_mipmap_tree *aux_mt = NULL;
+   uint32_t aux_mode = 0;
    mesa_format format = intelObj->_Format;
 
    if (tObj->Target == GL_TEXTURE_BUFFER) {
@@ -197,7 +199,13 @@ gen8_update_texture_surface(struct gl_context *ctx,
                        GEN7_SURFACE_MIN_LOD) |
              (intelObj->_MaxLevel - tObj->BaseLevel); /* mip count */
 
-   surf[6] = 0;
+   if (aux_mt) {
+      surf[6] = SET_FIELD(mt->qpitch / 4, GEN8_SURFACE_AUX_QPITCH) |
+                SET_FIELD((aux_mt->pitch / 128) - 1, GEN8_SURFACE_AUX_PITCH) |
+                aux_mode;
+   } else {
+      surf[6] = 0;
+   }
 
    /* Handling GL_ALPHA as a surface format override breaks 1.30+ style
     * texturing functions that return a float, as our code generation always
@@ -219,8 +227,15 @@ gen8_update_texture_surface(struct gl_context *ctx,
 
    *((uint64_t *) &surf[8]) = mt->bo->offset64 + mt->offset; /* reloc */
 
-   surf[10] = 0;
-   surf[11] = 0;
+   if (aux_mt) {
+      *((uint64_t *) &surf[10]) = aux_mt->bo->offset64;
+      drm_intel_bo_emit_reloc(brw->batch.bo, *surf_offset + 10 * 4,
+                              aux_mt->bo, 0,
+                              I915_GEM_DOMAIN_SAMPLER, 0);
+   } else {
+      surf[10] = 0;
+      surf[11] = 0;
+   }
    surf[12] = 0;
 
    /* Emit relocation to surface contents */
@@ -286,6 +301,8 @@ gen8_update_renderbuffer_surface(struct brw_context *brw,
    struct gl_context *ctx = &brw->ctx;
    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
    struct intel_mipmap_tree *mt = irb->mt;
+   struct intel_mipmap_tree *aux_mt = NULL;
+   uint32_t aux_mode = 0;
    unsigned width = mt->logical_width0;
    unsigned height = mt->logical_height0;
    unsigned pitch = mt->pitch;
@@ -364,7 +381,13 @@ gen8_update_renderbuffer_surface(struct brw_context *brw,
 
    surf[5] = irb->mt_level - irb->mt->first_level;
 
-   surf[6] = 0; /* Nothing of relevance. */
+   if (aux_mt) {
+      surf[6] = SET_FIELD(mt->qpitch / 4, GEN8_SURFACE_AUX_QPITCH) |
+                SET_FIELD((aux_mt->pitch / 128) - 1, GEN8_SURFACE_AUX_PITCH) |
+                aux_mode;
+   } else {
+      surf[6] = 0;
+   }
 
    surf[7] = mt->fast_clear_color_value |
              SET_FIELD(HSW_SCS_RED,   GEN7_SURFACE_SCS_R) |
@@ -374,9 +397,16 @@ gen8_update_renderbuffer_surface(struct brw_context *brw,
 
    *((uint64_t *) &surf[8]) = mt->bo->offset64; /* reloc */
 
-   /* Nothing of relevance. */
-   surf[10] = 0;
-   surf[11] = 0;
+   if (aux_mt) {
+      *((uint64_t *) &surf[10]) = aux_mt->bo->offset64;
+      drm_intel_bo_emit_reloc(brw->batch.bo,
+                              brw->wm.base.surf_offset[surf_index] + 10 * 4,
+                              aux_mt->bo, 0,
+                              I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER);
+   } else {
+      surf[10] = 0;
+      surf[11] = 0;
+   }
    surf[12] = 0;
 
    drm_intel_bo_emit_reloc(brw->batch.bo,