--- /dev/null
+/*
+ * Copyright (c) 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+
+#include "intel_batchbuffer.h"
+#include "intel_fbo.h"
+#include "intel_mipmap_tree.h"
+
+#include "brw_context.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+
+#include "main/fbobject.h"
+#include "main/glformats.h"
+
+void
+gen6_emit_depth_stencil_hiz(struct brw_context *brw,
+ struct intel_mipmap_tree *depth_mt,
+ uint32_t depth_offset, uint32_t depthbuffer_format,
+ uint32_t depth_surface_type,
+ struct intel_mipmap_tree *stencil_mt,
+ bool hiz, bool separate_stencil,
+ uint32_t width, uint32_t height,
+ uint32_t tile_x, uint32_t tile_y)
+{
+ /* Enable the hiz bit if we're doing separate stencil, because it and the
+ * separate stencil bit must have the same value. From Section 2.11.5.6.1.1
+ * 3DSTATE_DEPTH_BUFFER, Bit 1.21 "Separate Stencil Enable":
+ * [DevIL]: If this field is enabled, Hierarchical Depth Buffer
+ * Enable must also be enabled.
+ *
+ * [DevGT]: This field must be set to the same value (enabled or
+ * disabled) as Hierarchical Depth Buffer Enable
+ */
+ bool enable_hiz_ss = hiz || separate_stencil;
+
+
+ /* 3DSTATE_DEPTH_BUFFER, 3DSTATE_STENCIL_BUFFER are both
+ * non-pipelined state that will need the PIPE_CONTROL workaround.
+ */
+ if (brw->gen == 6) {
+ intel_emit_post_sync_nonzero_flush(brw);
+ intel_emit_depth_stall_flushes(brw);
+ }
+
+ unsigned int len;
+ if (brw->gen >= 6)
+ len = 7;
+ else if (brw->is_g4x || brw->gen == 5)
+ len = 6;
+ else
+ len = 5;
+
+ BEGIN_BATCH(len);
+ OUT_BATCH(_3DSTATE_DEPTH_BUFFER << 16 | (len - 2));
+ OUT_BATCH((depth_mt ? depth_mt->pitch - 1 : 0) |
+ (depthbuffer_format << 18) |
+ ((enable_hiz_ss ? 1 : 0) << 21) | /* separate stencil enable */
+ ((enable_hiz_ss ? 1 : 0) << 22) | /* hiz enable */
+ (BRW_TILEWALK_YMAJOR << 26) |
+ ((depth_mt ? depth_mt->tiling != I915_TILING_NONE : 1)
+ << 27) |
+ (depth_surface_type << 29));
+
+ if (depth_mt) {
+ OUT_RELOC(depth_mt->bo,
+ I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
+ depth_offset);
+ } else {
+ OUT_BATCH(0);
+ }
+
+ OUT_BATCH(((width + tile_x - 1) << 6) |
+ ((height + tile_y - 1) << 19));
+ OUT_BATCH(0);
+
+ if (brw->is_g4x || brw->gen >= 5)
+ OUT_BATCH(tile_x | (tile_y << 16));
+ else
+ assert(tile_x == 0 && tile_y == 0);
+
+ if (brw->gen >= 6)
+ OUT_BATCH(0);
+
+ ADVANCE_BATCH();
+
+ if (hiz || separate_stencil) {
+ /*
+ * In the 3DSTATE_DEPTH_BUFFER batch emitted above, the 'separate
+ * stencil enable' and 'hiz enable' bits were set. Therefore we must
+ * emit 3DSTATE_HIER_DEPTH_BUFFER and 3DSTATE_STENCIL_BUFFER. Even if
+ * there is no stencil buffer, 3DSTATE_STENCIL_BUFFER must be emitted;
+ * failure to do so causes hangs on gen5 and a stall on gen6.
+ */
+
+ /* Emit hiz buffer. */
+ if (hiz) {
+ struct intel_mipmap_tree *hiz_mt = depth_mt->hiz_mt;
+ BEGIN_BATCH(3);
+ OUT_BATCH((_3DSTATE_HIER_DEPTH_BUFFER << 16) | (3 - 2));
+ OUT_BATCH(hiz_mt->pitch - 1);
+ OUT_RELOC(hiz_mt->bo,
+ I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
+ brw->depthstencil.hiz_offset);
+ ADVANCE_BATCH();
+ } else {
+ BEGIN_BATCH(3);
+ OUT_BATCH((_3DSTATE_HIER_DEPTH_BUFFER << 16) | (3 - 2));
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+ }
+
+ /* Emit stencil buffer. */
+ if (separate_stencil) {
+ BEGIN_BATCH(3);
+ OUT_BATCH((_3DSTATE_STENCIL_BUFFER << 16) | (3 - 2));
+ /* The stencil buffer has quirky pitch requirements. From Vol 2a,
+ * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
+ * The pitch must be set to 2x the value computed based on width, as
+ * the stencil buffer is stored with two rows interleaved.
+ */
+ OUT_BATCH(2 * stencil_mt->pitch - 1);
+ OUT_RELOC(stencil_mt->bo,
+ I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
+ brw->depthstencil.stencil_offset);
+ ADVANCE_BATCH();
+ } else {
+ BEGIN_BATCH(3);
+ OUT_BATCH((_3DSTATE_STENCIL_BUFFER << 16) | (3 - 2));
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+ }
+ }
+
+ /*
+ * On Gen >= 6, emit clear params for safety. If using hiz, then clear
+ * params must be emitted.
+ *
+ * From Section 2.11.5.6.4.1 3DSTATE_CLEAR_PARAMS:
+ * 3DSTATE_CLEAR_PARAMS packet must follow the DEPTH_BUFFER_STATE packet
+ * when HiZ is enabled and the DEPTH_BUFFER_STATE changes.
+ */
+ if (brw->gen >= 6 || hiz) {
+ if (brw->gen == 6)
+ intel_emit_post_sync_nonzero_flush(brw);
+
+ BEGIN_BATCH(2);
+ OUT_BATCH(_3DSTATE_CLEAR_PARAMS << 16 |
+ GEN5_DEPTH_CLEAR_VALID |
+ (2 - 2));
+ OUT_BATCH(depth_mt ? depth_mt->depth_clear_value : 0);
+ ADVANCE_BATCH();
+ }
+}
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