2 * Copyright © 2015 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 "brw_context.h"
25 #include "brw_state.h"
26 #include "brw_defines.h"
27 #include "brw_program.h"
28 #include "intel_batchbuffer.h"
29 #include "intel_buffer_objects.h"
30 #include "program/prog_parameter.h"
35 return *(uint32_t *)&f
;
39 brw_param_value(struct brw_context
*brw
,
40 const struct gl_program
*prog
,
41 const struct brw_stage_state
*stage_state
,
44 struct gl_context
*ctx
= &brw
->ctx
;
46 switch (BRW_PARAM_DOMAIN(param
)) {
47 case BRW_PARAM_DOMAIN_BUILTIN
:
48 if (param
== BRW_PARAM_BUILTIN_ZERO
) {
50 } else if (BRW_PARAM_BUILTIN_IS_CLIP_PLANE(param
)) {
51 gl_clip_plane
*clip_planes
= brw_select_clip_planes(ctx
);
52 unsigned idx
= BRW_PARAM_BUILTIN_CLIP_PLANE_IDX(param
);
53 unsigned comp
= BRW_PARAM_BUILTIN_CLIP_PLANE_COMP(param
);
54 return ((uint32_t *)clip_planes
[idx
])[comp
];
55 } else if (param
>= BRW_PARAM_BUILTIN_TESS_LEVEL_OUTER_X
&&
56 param
<= BRW_PARAM_BUILTIN_TESS_LEVEL_OUTER_W
) {
57 unsigned i
= param
- BRW_PARAM_BUILTIN_TESS_LEVEL_OUTER_X
;
58 return f_as_u32(ctx
->TessCtrlProgram
.patch_default_outer_level
[i
]);
59 } else if (param
== BRW_PARAM_BUILTIN_TESS_LEVEL_INNER_X
) {
60 return f_as_u32(ctx
->TessCtrlProgram
.patch_default_inner_level
[0]);
61 } else if (param
== BRW_PARAM_BUILTIN_TESS_LEVEL_INNER_Y
) {
62 return f_as_u32(ctx
->TessCtrlProgram
.patch_default_inner_level
[1]);
64 unreachable("Invalid param builtin");
67 case BRW_PARAM_DOMAIN_PARAMETER
: {
68 unsigned idx
= BRW_PARAM_PARAMETER_IDX(param
);
69 unsigned comp
= BRW_PARAM_PARAMETER_COMP(param
);
70 assert(idx
< prog
->Parameters
->NumParameters
);
71 return prog
->Parameters
->ParameterValues
[idx
][comp
].u
;
74 case BRW_PARAM_DOMAIN_UNIFORM
: {
75 unsigned idx
= BRW_PARAM_UNIFORM_IDX(param
);
76 assert(idx
< prog
->sh
.data
->NumUniformDataSlots
);
77 return prog
->sh
.data
->UniformDataSlots
[idx
].u
;
80 case BRW_PARAM_DOMAIN_IMAGE
: {
81 unsigned idx
= BRW_PARAM_IMAGE_IDX(param
);
82 unsigned offset
= BRW_PARAM_IMAGE_OFFSET(param
);
83 assert(offset
< ARRAY_SIZE(stage_state
->image_param
));
84 return ((uint32_t *)&stage_state
->image_param
[idx
])[offset
];
88 unreachable("Invalid param domain");
94 brw_populate_constant_data(struct brw_context
*brw
,
95 const struct gl_program
*prog
,
96 const struct brw_stage_state
*stage_state
,
98 const uint32_t *param
,
101 uint32_t *dst
= void_dst
;
102 for (unsigned i
= 0; i
< nr_params
; i
++)
103 dst
[i
] = brw_param_value(brw
, prog
, stage_state
, param
[i
]);
108 * Creates a streamed BO containing the push constants for the VS or GS on
111 * Push constants are constant values (such as GLSL uniforms) that are
112 * pre-loaded into a shader stage's register space at thread spawn time.
114 * Not all GLSL uniforms will be uploaded as push constants: The hardware has
115 * a limitation of 32 or 64 EU registers (256 or 512 floats) per stage to be
116 * uploaded as push constants, while GL 4.4 requires at least 1024 components
117 * to be usable for the VS. Plus, currently we always use pull constants
118 * instead of push constants when doing variable-index array access.
120 * See brw_curbe.c for the equivalent gen4/5 code.
123 gen6_upload_push_constants(struct brw_context
*brw
,
124 const struct gl_program
*prog
,
125 const struct brw_stage_prog_data
*prog_data
,
126 struct brw_stage_state
*stage_state
)
128 const struct gen_device_info
*devinfo
= &brw
->screen
->devinfo
;
129 struct gl_context
*ctx
= &brw
->ctx
;
131 if (prog_data
->nr_params
== 0) {
132 stage_state
->push_const_size
= 0;
134 /* Updates the ParamaterValues[i] pointers for all parameters of the
135 * basic type of PROGRAM_STATE_VAR.
137 /* XXX: Should this happen somewhere before to get our state flag set? */
139 _mesa_load_state_parameters(ctx
, prog
->Parameters
);
142 const int size
= prog_data
->nr_params
* sizeof(gl_constant_value
);
143 gl_constant_value
*param
;
144 if (devinfo
->gen
>= 8 || devinfo
->is_haswell
) {
145 param
= intel_upload_space(brw
, size
, 32,
146 &stage_state
->push_const_bo
,
147 &stage_state
->push_const_offset
);
149 param
= brw_state_batch(brw
, size
, 32,
150 &stage_state
->push_const_offset
);
153 STATIC_ASSERT(sizeof(gl_constant_value
) == sizeof(float));
155 /* _NEW_PROGRAM_CONSTANTS
157 * Also _NEW_TRANSFORM -- we may reference clip planes other than as a
158 * side effect of dereferencing uniforms, so _NEW_PROGRAM_CONSTANTS
159 * wouldn't be set for them.
161 brw_populate_constant_data(brw
, prog
, stage_state
, param
,
163 prog_data
->nr_params
);
166 fprintf(stderr
, "%s constants:\n",
167 _mesa_shader_stage_to_string(stage_state
->stage
));
168 for (i
= 0; i
< prog_data
->nr_params
; i
++) {
170 fprintf(stderr
, "g%d: ",
171 prog_data
->dispatch_grf_start_reg
+ i
/ 8);
172 fprintf(stderr
, "%8f ", param
[i
].f
);
174 fprintf(stderr
, "\n");
177 fprintf(stderr
, "\n");
178 fprintf(stderr
, "\n");
181 stage_state
->push_const_size
= ALIGN(prog_data
->nr_params
, 8) / 8;
182 /* We can only push 32 registers of constants at a time. */
184 /* From the SNB PRM (vol2, part 1, section 3.2.1.4: 3DSTATE_CONSTANT_VS:
186 * "The sum of all four read length fields (each incremented to
187 * represent the actual read length) must be less than or equal to
190 * From the IVB PRM (vol2, part 1, section 3.2.1.3: 3DSTATE_CONSTANT_VS:
192 * "The sum of all four read length fields must be less than or
193 * equal to the size of 64"
195 * The other shader stages all match the VS's limits.
197 assert(stage_state
->push_const_size
<= 32);
200 stage_state
->push_constants_dirty
= true;
205 * Creates a temporary BO containing the pull constant data for the shader
206 * stage, and the SURFACE_STATE struct that points at it.
208 * Pull constants are GLSL uniforms (and other constant data) beyond what we
209 * could fit as push constants, or that have variable-index array access
210 * (which is easiest to support using pull constants, and avoids filling
211 * register space with mostly-unused data).
213 * Compare this path to brw_curbe.c for gen4/5 push constants, and
214 * gen6_vs_state.c for gen6+ push constants.
217 brw_upload_pull_constants(struct brw_context
*brw
,
218 GLbitfield64 brw_new_constbuf
,
219 const struct gl_program
*prog
,
220 struct brw_stage_state
*stage_state
,
221 const struct brw_stage_prog_data
*prog_data
)
224 uint32_t surf_index
= prog_data
->binding_table
.pull_constants_start
;
226 if (!prog_data
->nr_pull_params
) {
227 if (stage_state
->surf_offset
[surf_index
]) {
228 stage_state
->surf_offset
[surf_index
] = 0;
229 brw
->ctx
.NewDriverState
|= brw_new_constbuf
;
234 /* Updates the ParamaterValues[i] pointers for all parameters of the
235 * basic type of PROGRAM_STATE_VAR.
237 _mesa_load_state_parameters(&brw
->ctx
, prog
->Parameters
);
239 /* BRW_NEW_*_PROG_DATA | _NEW_PROGRAM_CONSTANTS */
240 uint32_t size
= prog_data
->nr_pull_params
* 4;
241 struct brw_bo
*const_bo
= NULL
;
242 uint32_t const_offset
;
243 gl_constant_value
*constants
= intel_upload_space(brw
, size
, 64,
244 &const_bo
, &const_offset
);
246 STATIC_ASSERT(sizeof(gl_constant_value
) == sizeof(float));
248 brw_populate_constant_data(brw
, prog
, stage_state
, constants
,
249 prog_data
->pull_param
,
250 prog_data
->nr_pull_params
);
253 for (i
= 0; i
< ALIGN(prog_data
->nr_pull_params
, 4) / 4; i
++) {
254 const gl_constant_value
*row
= &constants
[i
* 4];
255 fprintf(stderr
, "const surface %3d: %4.3f %4.3f %4.3f %4.3f\n",
256 i
, row
[0].f
, row
[1].f
, row
[2].f
, row
[3].f
);
260 brw_create_constant_surface(brw
, const_bo
, const_offset
, size
,
261 &stage_state
->surf_offset
[surf_index
]);
262 brw_bo_unreference(const_bo
);
264 brw
->ctx
.NewDriverState
|= brw_new_constbuf
;
268 * Creates a region containing the push constants for the CS on gen7+.
270 * Push constants are constant values (such as GLSL uniforms) that are
271 * pre-loaded into a shader stage's register space at thread spawn time.
273 * For other stages, see brw_curbe.c:brw_upload_constant_buffer for the
274 * equivalent gen4/5 code and gen6_vs_state.c:gen6_upload_push_constants for
278 brw_upload_cs_push_constants(struct brw_context
*brw
,
279 const struct gl_program
*prog
,
280 const struct brw_cs_prog_data
*cs_prog_data
,
281 struct brw_stage_state
*stage_state
)
283 struct gl_context
*ctx
= &brw
->ctx
;
284 const struct brw_stage_prog_data
*prog_data
=
285 (struct brw_stage_prog_data
*) cs_prog_data
;
287 /* Updates the ParamaterValues[i] pointers for all parameters of the
288 * basic type of PROGRAM_STATE_VAR.
290 /* XXX: Should this happen somewhere before to get our state flag set? */
291 _mesa_load_state_parameters(ctx
, prog
->Parameters
);
293 if (cs_prog_data
->push
.total
.size
== 0) {
294 stage_state
->push_const_size
= 0;
300 brw_state_batch(brw
, ALIGN(cs_prog_data
->push
.total
.size
, 64),
301 64, &stage_state
->push_const_offset
);
304 STATIC_ASSERT(sizeof(gl_constant_value
) == sizeof(float));
306 if (cs_prog_data
->push
.cross_thread
.size
> 0) {
307 uint32_t *param_copy
= param
;
308 assert(cs_prog_data
->thread_local_id_index
< 0 ||
309 cs_prog_data
->thread_local_id_index
>=
310 cs_prog_data
->push
.cross_thread
.dwords
);
312 i
< cs_prog_data
->push
.cross_thread
.dwords
;
314 param_copy
[i
] = brw_param_value(brw
, prog
, stage_state
,
315 prog_data
->param
[i
]);
319 if (cs_prog_data
->push
.per_thread
.size
> 0) {
320 for (unsigned t
= 0; t
< cs_prog_data
->threads
; t
++) {
322 8 * (cs_prog_data
->push
.per_thread
.regs
* t
+
323 cs_prog_data
->push
.cross_thread
.regs
);
324 unsigned src
= cs_prog_data
->push
.cross_thread
.dwords
;
325 for ( ; src
< prog_data
->nr_params
; src
++, dst
++) {
326 if (src
!= cs_prog_data
->thread_local_id_index
) {
327 param
[dst
] = brw_param_value(brw
, prog
, stage_state
,
328 prog_data
->param
[src
]);
330 param
[dst
] = t
* cs_prog_data
->simd_size
;
336 stage_state
->push_const_size
=
337 cs_prog_data
->push
.cross_thread
.regs
+
338 cs_prog_data
->push
.per_thread
.regs
;