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 "main/macros.h"
25 #include "intel_batchbuffer.h"
26 #include "brw_context.h"
27 #include "brw_state.h"
28 #include "brw_defines.h"
30 #include "common/gen_l3_config.h"
33 * The following diagram shows how we partition the URB:
35 * 16kB or 32kB Rest of the URB space
36 * __________-__________ _________________-_________________
38 * +-------------------------------------------------------------+
39 * | VS/HS/DS/GS/FS Push | VS/HS/DS/GS URB |
40 * | Constants | Entries |
41 * +-------------------------------------------------------------+
43 * Notably, push constants must be stored at the beginning of the URB
44 * space, while entries can be stored anywhere. Ivybridge and Haswell
45 * GT1/GT2 have a maximum constant buffer size of 16kB, while Haswell GT3
46 * doubles this (32kB).
48 * Ivybridge and Haswell GT1/GT2 allow push constants to be located (and
49 * sized) in increments of 1kB. Haswell GT3 requires them to be located and
50 * sized in increments of 2kB.
52 * Currently we split the constant buffer space evenly among whatever stages
53 * are active. This is probably not ideal, but simple.
55 * Ivybridge GT1 and Haswell GT1 have 128kB of URB space.
56 * Ivybridge GT2 and Haswell GT2 have 256kB of URB space.
57 * Haswell GT3 has 512kB of URB space.
59 * See "Volume 2a: 3D Pipeline," section 1.8, "Volume 1b: Configurations",
60 * and the documentation for 3DSTATE_PUSH_CONSTANT_ALLOC_xS.
63 gen7_allocate_push_constants(struct brw_context
*brw
)
65 /* BRW_NEW_GEOMETRY_PROGRAM */
66 bool gs_present
= brw
->geometry_program
;
68 /* BRW_NEW_TESS_PROGRAMS */
69 bool tess_present
= brw
->tess_eval_program
;
71 unsigned avail_size
= 16;
73 (brw
->gen
>= 8 || (brw
->is_haswell
&& brw
->gt
== 3)) ? 2 : 1;
75 int stages
= 2 + gs_present
+ 2 * tess_present
;
77 /* Divide up the available space equally between stages. Because we
78 * round down (using floor division), there may be some left over
79 * space. We allocate that to the pixel shader stage.
81 unsigned size_per_stage
= avail_size
/ stages
;
83 unsigned vs_size
= size_per_stage
;
84 unsigned hs_size
= tess_present
? size_per_stage
: 0;
85 unsigned ds_size
= tess_present
? size_per_stage
: 0;
86 unsigned gs_size
= gs_present
? size_per_stage
: 0;
87 unsigned fs_size
= avail_size
- size_per_stage
* (stages
- 1);
89 gen7_emit_push_constant_state(brw
, multiplier
* vs_size
,
90 multiplier
* hs_size
, multiplier
* ds_size
,
91 multiplier
* gs_size
, multiplier
* fs_size
);
93 /* From p115 of the Ivy Bridge PRM (3.2.1.4 3DSTATE_PUSH_CONSTANT_ALLOC_VS):
95 * Programming Restriction:
97 * The 3DSTATE_CONSTANT_VS must be reprogrammed prior to the next
98 * 3DPRIMITIVE command after programming the
99 * 3DSTATE_PUSH_CONSTANT_ALLOC_VS.
101 * Similar text exists for the other 3DSTATE_PUSH_CONSTANT_ALLOC_*
104 brw
->ctx
.NewDriverState
|= BRW_NEW_PUSH_CONSTANT_ALLOCATION
;
108 gen7_emit_push_constant_state(struct brw_context
*brw
, unsigned vs_size
,
109 unsigned hs_size
, unsigned ds_size
,
110 unsigned gs_size
, unsigned fs_size
)
115 OUT_BATCH(_3DSTATE_PUSH_CONSTANT_ALLOC_VS
<< 16 | (2 - 2));
116 OUT_BATCH(vs_size
| offset
<< GEN7_PUSH_CONSTANT_BUFFER_OFFSET_SHIFT
);
119 OUT_BATCH(_3DSTATE_PUSH_CONSTANT_ALLOC_HS
<< 16 | (2 - 2));
120 OUT_BATCH(hs_size
| offset
<< GEN7_PUSH_CONSTANT_BUFFER_OFFSET_SHIFT
);
123 OUT_BATCH(_3DSTATE_PUSH_CONSTANT_ALLOC_DS
<< 16 | (2 - 2));
124 OUT_BATCH(ds_size
| offset
<< GEN7_PUSH_CONSTANT_BUFFER_OFFSET_SHIFT
);
127 OUT_BATCH(_3DSTATE_PUSH_CONSTANT_ALLOC_GS
<< 16 | (2 - 2));
128 OUT_BATCH(gs_size
| offset
<< GEN7_PUSH_CONSTANT_BUFFER_OFFSET_SHIFT
);
131 OUT_BATCH(_3DSTATE_PUSH_CONSTANT_ALLOC_PS
<< 16 | (2 - 2));
132 OUT_BATCH(fs_size
| offset
<< GEN7_PUSH_CONSTANT_BUFFER_OFFSET_SHIFT
);
135 /* From p292 of the Ivy Bridge PRM (11.2.4 3DSTATE_PUSH_CONSTANT_ALLOC_PS):
137 * A PIPE_CONTROL command with the CS Stall bit set must be programmed
138 * in the ring after this instruction.
140 * No such restriction exists for Haswell or Baytrail.
142 if (brw
->gen
< 8 && !brw
->is_haswell
&& !brw
->is_baytrail
)
143 gen7_emit_cs_stall_flush(brw
);
146 const struct brw_tracked_state gen7_push_constant_space
= {
149 .brw
= BRW_NEW_CONTEXT
|
150 BRW_NEW_GEOMETRY_PROGRAM
|
151 BRW_NEW_TESS_PROGRAMS
,
153 .emit
= gen7_allocate_push_constants
,
157 upload_urb(struct brw_context
*brw
)
159 /* BRW_NEW_VS_PROG_DATA */
160 const struct brw_vue_prog_data
*vs_vue_prog_data
=
161 brw_vue_prog_data(brw
->vs
.base
.prog_data
);
162 const unsigned vs_size
= MAX2(vs_vue_prog_data
->urb_entry_size
, 1);
163 /* BRW_NEW_GS_PROG_DATA */
164 const bool gs_present
= brw
->gs
.base
.prog_data
;
165 /* BRW_NEW_TES_PROG_DATA */
166 const bool tess_present
= brw
->tes
.base
.prog_data
;
168 gen7_upload_urb(brw
, vs_size
, gs_present
, tess_present
);
172 gen7_upload_urb(struct brw_context
*brw
, unsigned vs_size
,
173 bool gs_present
, bool tess_present
)
175 const struct gen_device_info
*devinfo
= &brw
->screen
->devinfo
;
176 const int push_size_kB
=
177 (brw
->gen
>= 8 || (brw
->is_haswell
&& brw
->gt
== 3)) ? 32 : 16;
179 /* BRW_NEW_{VS,TCS,TES,GS}_PROG_DATA */
180 struct brw_vue_prog_data
*prog_data
[4] = {
181 [MESA_SHADER_VERTEX
] =
182 brw_vue_prog_data(brw
->vs
.base
.prog_data
),
183 [MESA_SHADER_TESS_CTRL
] =
184 tess_present
? brw_vue_prog_data(brw
->tcs
.base
.prog_data
) : NULL
,
185 [MESA_SHADER_TESS_EVAL
] =
186 tess_present
? brw_vue_prog_data(brw
->tes
.base
.prog_data
) : NULL
,
187 [MESA_SHADER_GEOMETRY
] =
188 gs_present
? brw_vue_prog_data(brw
->gs
.base
.prog_data
) : NULL
,
191 unsigned entry_size
[4];
192 entry_size
[MESA_SHADER_VERTEX
] = vs_size
;
193 for (int i
= MESA_SHADER_TESS_CTRL
; i
<= MESA_SHADER_GEOMETRY
; i
++) {
194 entry_size
[i
] = prog_data
[i
] ? prog_data
[i
]->urb_entry_size
: 1;
197 /* If we're just switching between programs with the same URB requirements,
198 * skip the rest of the logic.
200 if (!(brw
->ctx
.NewDriverState
& BRW_NEW_CONTEXT
) &&
201 !(brw
->ctx
.NewDriverState
& BRW_NEW_URB_SIZE
) &&
202 brw
->urb
.vsize
== entry_size
[MESA_SHADER_VERTEX
] &&
203 brw
->urb
.gs_present
== gs_present
&&
204 brw
->urb
.gsize
== entry_size
[MESA_SHADER_GEOMETRY
] &&
205 brw
->urb
.tess_present
== tess_present
&&
206 brw
->urb
.hsize
== entry_size
[MESA_SHADER_TESS_CTRL
] &&
207 brw
->urb
.dsize
== entry_size
[MESA_SHADER_TESS_EVAL
]) {
210 brw
->urb
.vsize
= entry_size
[MESA_SHADER_VERTEX
];
211 brw
->urb
.gs_present
= gs_present
;
212 brw
->urb
.gsize
= entry_size
[MESA_SHADER_GEOMETRY
];
213 brw
->urb
.tess_present
= tess_present
;
214 brw
->urb
.hsize
= entry_size
[MESA_SHADER_TESS_CTRL
];
215 brw
->urb
.dsize
= entry_size
[MESA_SHADER_TESS_EVAL
];
219 gen_get_urb_config(devinfo
, 1024 * push_size_kB
, 1024 * brw
->urb
.size
,
220 tess_present
, gs_present
, entry_size
, entries
, start
);
222 if (brw
->gen
== 7 && !brw
->is_haswell
&& !brw
->is_baytrail
)
223 gen7_emit_vs_workaround_flush(brw
);
226 for (int i
= MESA_SHADER_VERTEX
; i
<= MESA_SHADER_GEOMETRY
; i
++) {
227 OUT_BATCH((_3DSTATE_URB_VS
+ i
) << 16 | (2 - 2));
228 OUT_BATCH(entries
[i
] |
229 ((entry_size
[i
] - 1) << GEN7_URB_ENTRY_SIZE_SHIFT
) |
230 (start
[i
] << GEN7_URB_STARTING_ADDRESS_SHIFT
));
235 const struct brw_tracked_state gen7_urb
= {
238 .brw
= BRW_NEW_CONTEXT
|
240 BRW_NEW_GS_PROG_DATA
|
241 BRW_NEW_TCS_PROG_DATA
|
242 BRW_NEW_TES_PROG_DATA
|
243 BRW_NEW_VS_PROG_DATA
,