2 * Copyright © 2011 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 #include "intel_batchbuffer.h"
25 #include "intel_mipmap_tree.h"
26 #include "intel_regions.h"
27 #include "intel_fbo.h"
28 #include "intel_resolve_map.h"
29 #include "brw_context.h"
30 #include "brw_state.h"
31 #include "brw_defines.h"
34 * Helper function to emit depth related command packets.
37 emit_depth_packets(struct brw_context
*brw
,
38 struct intel_mipmap_tree
*depth_mt
,
39 uint32_t depthbuffer_format
,
40 uint32_t depth_surface_type
,
42 struct intel_mipmap_tree
*stencil_mt
,
43 bool stencil_writable
,
44 uint32_t stencil_offset
,
50 uint32_t min_array_element
)
52 intel_emit_depth_stall_flushes(brw
);
54 /* _NEW_BUFFERS, _NEW_DEPTH, _NEW_STENCIL */
56 OUT_BATCH(GEN7_3DSTATE_DEPTH_BUFFER
<< 16 | (8 - 2));
57 OUT_BATCH(depth_surface_type
<< 29 |
58 (depth_writable
? (1 << 28) : 0) |
59 (stencil_mt
!= NULL
&& stencil_writable
) << 27 |
61 depthbuffer_format
<< 18 |
62 (depth_mt
? depth_mt
->region
->pitch
- 1 : 0));
64 OUT_RELOC64(depth_mt
->region
->bo
,
65 I915_GEM_DOMAIN_RENDER
, I915_GEM_DOMAIN_RENDER
, 0);
70 OUT_BATCH(((width
- 1) << 4) | ((height
- 1) << 18) | lod
);
71 OUT_BATCH(((depth
- 1) << 21) | (min_array_element
<< 10) | BDW_MOCS_WB
);
73 OUT_BATCH(depth_mt
? depth_mt
->qpitch
>> 2 : 0);
78 OUT_BATCH(GEN7_3DSTATE_HIER_DEPTH_BUFFER
<< 16 | (5 - 2));
86 OUT_BATCH(GEN7_3DSTATE_HIER_DEPTH_BUFFER
<< 16 | (5 - 2));
87 OUT_BATCH((depth_mt
->hiz_mt
->region
->pitch
- 1) | BDW_MOCS_WB
<< 25);
88 OUT_RELOC64(depth_mt
->hiz_mt
->region
->bo
,
89 I915_GEM_DOMAIN_RENDER
, I915_GEM_DOMAIN_RENDER
, 0);
90 OUT_BATCH(depth_mt
->hiz_mt
->qpitch
>> 2);
94 if (stencil_mt
== NULL
) {
96 OUT_BATCH(GEN7_3DSTATE_STENCIL_BUFFER
<< 16 | (5 - 2));
104 OUT_BATCH(GEN7_3DSTATE_STENCIL_BUFFER
<< 16 | (5 - 2));
105 /* The stencil buffer has quirky pitch requirements. From the Graphics
106 * BSpec: vol2a.11 3D Pipeline Windower > Early Depth/Stencil Processing
107 * > Depth/Stencil Buffer State > 3DSTATE_STENCIL_BUFFER [DevIVB+],
108 * field "Surface Pitch":
110 * The pitch must be set to 2x the value computed based on width, as
111 * the stencil buffer is stored with two rows interleaved.
113 * (Note that it is not 100% clear whether this intended to apply to
114 * Gen7; the BSpec flags this comment as "DevILK,DevSNB" (which would
115 * imply that it doesn't), however the comment appears on a "DevIVB+"
116 * page (which would imply that it does). Experiments with the hardware
117 * indicate that it does.
119 OUT_BATCH(HSW_STENCIL_ENABLED
| BDW_MOCS_WB
<< 22 |
120 (2 * stencil_mt
->region
->pitch
- 1));
121 OUT_RELOC64(stencil_mt
->region
->bo
,
122 I915_GEM_DOMAIN_RENDER
, I915_GEM_DOMAIN_RENDER
,
124 OUT_BATCH(stencil_mt
? stencil_mt
->qpitch
>> 2 : 0);
129 OUT_BATCH(GEN7_3DSTATE_CLEAR_PARAMS
<< 16 | (3 - 2));
130 OUT_BATCH(depth_mt
? depth_mt
->depth_clear_value
: 0);
135 /* Awful vtable-compatible function; should be cleaned up in the future. */
137 gen8_emit_depth_stencil_hiz(struct brw_context
*brw
,
138 struct intel_mipmap_tree
*depth_mt
,
139 uint32_t depth_offset
,
140 uint32_t depthbuffer_format
,
141 uint32_t depth_surface_type
,
142 struct intel_mipmap_tree
*stencil_mt
,
143 bool hiz
, bool separate_stencil
,
144 uint32_t width
, uint32_t height
,
145 uint32_t tile_x
, uint32_t tile_y
)
147 struct gl_context
*ctx
= &brw
->ctx
;
148 struct gl_framebuffer
*fb
= ctx
->DrawBuffer
;
150 unsigned int depth
= 1;
151 unsigned int min_array_element
;
152 GLenum gl_target
= GL_TEXTURE_2D
;
154 const struct intel_mipmap_tree
*mt
= depth_mt
? depth_mt
: stencil_mt
;
155 const struct intel_renderbuffer
*irb
= NULL
;
156 const struct gl_renderbuffer
*rb
= NULL
;
158 irb
= intel_get_renderbuffer(fb
, BUFFER_DEPTH
);
160 irb
= intel_get_renderbuffer(fb
, BUFFER_STENCIL
);
161 rb
= (struct gl_renderbuffer
*) irb
;
164 depth
= MAX2(rb
->Depth
, 1);
166 gl_target
= rb
->TexImage
->TexObject
->Target
;
170 case GL_TEXTURE_CUBE_MAP_ARRAY
:
171 case GL_TEXTURE_CUBE_MAP
:
172 /* The PRM claims that we should use BRW_SURFACE_CUBE for this
173 * situation, but experiments show that gl_Layer doesn't work when we do
174 * this. So we use BRW_SURFACE_2D, since for rendering purposes this is
177 surftype
= BRW_SURFACE_2D
;
181 surftype
= translate_tex_target(gl_target
);
185 if (fb
->MaxNumLayers
> 0 || !irb
) {
186 min_array_element
= 0;
187 } else if (irb
->mt
->num_samples
> 1) {
188 /* Convert physical to logical layer. */
189 min_array_element
= irb
->mt_layer
/ irb
->mt
->num_samples
;
191 min_array_element
= irb
->mt_layer
;
194 lod
= irb
? irb
->mt_level
- irb
->mt
->first_level
: 0;
197 width
= mt
->logical_width0
;
198 height
= mt
->logical_height0
;
201 emit_depth_packets(brw
, depth_mt
, brw_depthbuffer_format(brw
), surftype
,
202 ctx
->Depth
.Mask
!= 0,
203 stencil_mt
, ctx
->Stencil
._WriteEnabled
,
204 brw
->depthstencil
.stencil_offset
,
205 hiz
, width
, height
, depth
, lod
, min_array_element
);
209 * Emit packets to perform a depth/HiZ resolve or fast depth/stencil clear.
211 * See the "Optimized Depth Buffer Clear and/or Stencil Buffer Clear" section
212 * of the hardware documentation for details.
215 gen8_hiz_exec(struct brw_context
*brw
, struct intel_mipmap_tree
*mt
,
216 unsigned int level
, unsigned int layer
, enum gen6_hiz_op op
)
218 if (op
== GEN6_HIZ_OP_NONE
)
221 assert(mt
->first_level
== 0);
222 assert(mt
->logical_depth0
>= 1);
224 /* The basic algorithm is:
225 * - If needed, emit 3DSTATE_{DEPTH,HIER_DEPTH,STENCIL}_BUFFER and
226 * 3DSTATE_CLEAR_PARAMS packets to set up the relevant buffers.
227 * - If needed, emit 3DSTATE_DRAWING_RECTANGLE.
228 * - Emit 3DSTATE_WM_HZ_OP with a bit set for the particular operation.
229 * - Do a special PIPE_CONTROL to trigger an implicit rectangle primitive.
230 * - Emit 3DSTATE_WM_HZ_OP with no bits set to return to normal rendering.
232 emit_depth_packets(brw
, mt
,
233 brw_depth_format(brw
, mt
->format
),
235 true, /* depth writes */
236 NULL
, false, 0, /* no stencil for now */
242 layer
); /* min_array_element */
244 unsigned rect_width
= minify(mt
->logical_width0
, level
);
245 unsigned rect_height
= minify(mt
->logical_height0
, level
);
248 OUT_BATCH(_3DSTATE_DRAWING_RECTANGLE
<< 16 | (4 - 2));
250 OUT_BATCH(((rect_width
- 1) & 0xffff) | ((rect_height
- 1) << 16));
254 /* Emit 3DSTATE_WM_HZ_OP to override pipeline state for the particular
255 * resolve or clear operation we want to perform.
260 case GEN6_HIZ_OP_DEPTH_RESOLVE
:
261 dw1
|= GEN8_WM_HZ_DEPTH_RESOLVE
;
263 case GEN6_HIZ_OP_HIZ_RESOLVE
:
264 dw1
|= GEN8_WM_HZ_HIZ_RESOLVE
;
266 case GEN6_HIZ_OP_DEPTH_CLEAR
:
267 dw1
|= GEN8_WM_HZ_DEPTH_CLEAR
;
269 case GEN6_HIZ_OP_NONE
:
270 assert(!"Should not get here.");
273 if (mt
->num_samples
> 0)
274 dw1
|= SET_FIELD(ffs(mt
->num_samples
) - 1, GEN8_WM_HZ_NUM_SAMPLES
);
277 OUT_BATCH(_3DSTATE_WM_HZ_OP
<< 16 | (5 - 2));
280 OUT_BATCH(SET_FIELD(rect_width
, GEN8_WM_HZ_CLEAR_RECTANGLE_X_MAX
) |
281 SET_FIELD(rect_height
, GEN8_WM_HZ_CLEAR_RECTANGLE_Y_MAX
));
282 OUT_BATCH(SET_FIELD(0xFFFF, GEN8_WM_HZ_SAMPLE_MASK
));
285 /* Emit a PIPE_CONTROL with "Post-Sync Operation" set to "Write Immediate
286 * Data", and no other bits set. This causes 3DSTATE_WM_HZ_OP's state to
287 * take effect, and spawns a rectangle primitive.
289 brw_emit_pipe_control_write(brw
,
290 PIPE_CONTROL_WRITE_IMMEDIATE
,
291 brw
->batch
.workaround_bo
, 0, 0, 0);
293 /* Emit 3DSTATE_WM_HZ_OP again to disable the state overrides. */
295 OUT_BATCH(_3DSTATE_WM_HZ_OP
<< 16 | (5 - 2));
302 /* We've clobbered all of the depth packets, and the drawing rectangle,
303 * so we need to ensure those packets are re-emitted before the next
306 * Setting _NEW_DEPTH and _NEW_BUFFERS covers it, but is rather overkill.
308 brw
->state
.dirty
.mesa
|= _NEW_DEPTH
| _NEW_BUFFERS
;