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 union fi fi
= { .f
= f
};
40 brw_param_value(struct brw_context
*brw
,
41 const struct gl_program
*prog
,
42 const struct brw_stage_state
*stage_state
,
45 struct gl_context
*ctx
= &brw
->ctx
;
47 switch (BRW_PARAM_DOMAIN(param
)) {
48 case BRW_PARAM_DOMAIN_BUILTIN
:
49 if (param
== BRW_PARAM_BUILTIN_ZERO
) {
51 } else if (BRW_PARAM_BUILTIN_IS_CLIP_PLANE(param
)) {
52 gl_clip_plane
*clip_planes
= brw_select_clip_planes(ctx
);
53 unsigned idx
= BRW_PARAM_BUILTIN_CLIP_PLANE_IDX(param
);
54 unsigned comp
= BRW_PARAM_BUILTIN_CLIP_PLANE_COMP(param
);
55 return ((uint32_t *)clip_planes
[idx
])[comp
];
56 } else if (param
>= BRW_PARAM_BUILTIN_TESS_LEVEL_OUTER_X
&&
57 param
<= BRW_PARAM_BUILTIN_TESS_LEVEL_OUTER_W
) {
58 unsigned i
= param
- BRW_PARAM_BUILTIN_TESS_LEVEL_OUTER_X
;
59 return f_as_u32(ctx
->TessCtrlProgram
.patch_default_outer_level
[i
]);
60 } else if (param
== BRW_PARAM_BUILTIN_TESS_LEVEL_INNER_X
) {
61 return f_as_u32(ctx
->TessCtrlProgram
.patch_default_inner_level
[0]);
62 } else if (param
== BRW_PARAM_BUILTIN_TESS_LEVEL_INNER_Y
) {
63 return f_as_u32(ctx
->TessCtrlProgram
.patch_default_inner_level
[1]);
65 unreachable("Invalid param builtin");
68 case BRW_PARAM_DOMAIN_PARAMETER
: {
69 unsigned idx
= BRW_PARAM_PARAMETER_IDX(param
);
70 unsigned comp
= BRW_PARAM_PARAMETER_COMP(param
);
71 assert(idx
< prog
->Parameters
->NumParameters
);
72 return prog
->Parameters
->ParameterValues
[idx
][comp
].u
;
75 case BRW_PARAM_DOMAIN_UNIFORM
: {
76 unsigned idx
= BRW_PARAM_UNIFORM_IDX(param
);
77 assert(idx
< prog
->sh
.data
->NumUniformDataSlots
);
78 return prog
->sh
.data
->UniformDataSlots
[idx
].u
;
81 case BRW_PARAM_DOMAIN_IMAGE
: {
82 unsigned idx
= BRW_PARAM_IMAGE_IDX(param
);
83 unsigned offset
= BRW_PARAM_IMAGE_OFFSET(param
);
84 assert(offset
< ARRAY_SIZE(stage_state
->image_param
));
85 return ((uint32_t *)&stage_state
->image_param
[idx
])[offset
];
89 unreachable("Invalid param domain");
95 brw_populate_constant_data(struct brw_context
*brw
,
96 const struct gl_program
*prog
,
97 const struct brw_stage_state
*stage_state
,
99 const uint32_t *param
,
102 uint32_t *dst
= void_dst
;
103 for (unsigned i
= 0; i
< nr_params
; i
++)
104 dst
[i
] = brw_param_value(brw
, prog
, stage_state
, param
[i
]);
109 * Creates a streamed BO containing the push constants for the VS or GS on
112 * Push constants are constant values (such as GLSL uniforms) that are
113 * pre-loaded into a shader stage's register space at thread spawn time.
115 * Not all GLSL uniforms will be uploaded as push constants: The hardware has
116 * a limitation of 32 or 64 EU registers (256 or 512 floats) per stage to be
117 * uploaded as push constants, while GL 4.4 requires at least 1024 components
118 * to be usable for the VS. Plus, currently we always use pull constants
119 * instead of push constants when doing variable-index array access.
121 * See brw_curbe.c for the equivalent gen4/5 code.
124 gen6_upload_push_constants(struct brw_context
*brw
,
125 const struct gl_program
*prog
,
126 const struct brw_stage_prog_data
*prog_data
,
127 struct brw_stage_state
*stage_state
)
129 const struct gen_device_info
*devinfo
= &brw
->screen
->devinfo
;
130 struct gl_context
*ctx
= &brw
->ctx
;
132 if (prog_data
->nr_params
== 0) {
133 stage_state
->push_const_size
= 0;
135 /* Updates the ParamaterValues[i] pointers for all parameters of the
136 * basic type of PROGRAM_STATE_VAR.
138 /* XXX: Should this happen somewhere before to get our state flag set? */
140 _mesa_load_state_parameters(ctx
, prog
->Parameters
);
143 const int size
= prog_data
->nr_params
* sizeof(gl_constant_value
);
144 gl_constant_value
*param
;
145 if (devinfo
->gen
>= 8 || devinfo
->is_haswell
) {
146 param
= intel_upload_space(brw
, size
, 32,
147 &stage_state
->push_const_bo
,
148 &stage_state
->push_const_offset
);
150 param
= brw_state_batch(brw
, size
, 32,
151 &stage_state
->push_const_offset
);
154 STATIC_ASSERT(sizeof(gl_constant_value
) == sizeof(float));
156 /* _NEW_PROGRAM_CONSTANTS
158 * Also _NEW_TRANSFORM -- we may reference clip planes other than as a
159 * side effect of dereferencing uniforms, so _NEW_PROGRAM_CONSTANTS
160 * wouldn't be set for them.
162 brw_populate_constant_data(brw
, prog
, stage_state
, param
,
164 prog_data
->nr_params
);
167 fprintf(stderr
, "%s constants:\n",
168 _mesa_shader_stage_to_string(stage_state
->stage
));
169 for (i
= 0; i
< prog_data
->nr_params
; i
++) {
171 fprintf(stderr
, "g%d: ",
172 prog_data
->dispatch_grf_start_reg
+ i
/ 8);
173 fprintf(stderr
, "%8f ", param
[i
].f
);
175 fprintf(stderr
, "\n");
178 fprintf(stderr
, "\n");
179 fprintf(stderr
, "\n");
182 stage_state
->push_const_size
= ALIGN(prog_data
->nr_params
, 8) / 8;
183 /* We can only push 32 registers of constants at a time. */
185 /* From the SNB PRM (vol2, part 1, section 3.2.1.4: 3DSTATE_CONSTANT_VS:
187 * "The sum of all four read length fields (each incremented to
188 * represent the actual read length) must be less than or equal to
191 * From the IVB PRM (vol2, part 1, section 3.2.1.3: 3DSTATE_CONSTANT_VS:
193 * "The sum of all four read length fields must be less than or
194 * equal to the size of 64"
196 * The other shader stages all match the VS's limits.
198 assert(stage_state
->push_const_size
<= 32);
201 stage_state
->push_constants_dirty
= true;
206 * Creates a temporary BO containing the pull constant data for the shader
207 * stage, and the SURFACE_STATE struct that points at it.
209 * Pull constants are GLSL uniforms (and other constant data) beyond what we
210 * could fit as push constants, or that have variable-index array access
211 * (which is easiest to support using pull constants, and avoids filling
212 * register space with mostly-unused data).
214 * Compare this path to brw_curbe.c for gen4/5 push constants, and
215 * gen6_vs_state.c for gen6+ push constants.
218 brw_upload_pull_constants(struct brw_context
*brw
,
219 GLbitfield64 brw_new_constbuf
,
220 const struct gl_program
*prog
,
221 struct brw_stage_state
*stage_state
,
222 const struct brw_stage_prog_data
*prog_data
)
225 uint32_t surf_index
= prog_data
->binding_table
.pull_constants_start
;
227 if (!prog_data
->nr_pull_params
) {
228 if (stage_state
->surf_offset
[surf_index
]) {
229 stage_state
->surf_offset
[surf_index
] = 0;
230 brw
->ctx
.NewDriverState
|= brw_new_constbuf
;
235 /* Updates the ParamaterValues[i] pointers for all parameters of the
236 * basic type of PROGRAM_STATE_VAR.
238 _mesa_load_state_parameters(&brw
->ctx
, prog
->Parameters
);
240 /* BRW_NEW_*_PROG_DATA | _NEW_PROGRAM_CONSTANTS */
241 uint32_t size
= prog_data
->nr_pull_params
* 4;
242 struct brw_bo
*const_bo
= NULL
;
243 uint32_t const_offset
;
244 gl_constant_value
*constants
= intel_upload_space(brw
, size
, 64,
245 &const_bo
, &const_offset
);
247 STATIC_ASSERT(sizeof(gl_constant_value
) == sizeof(float));
249 brw_populate_constant_data(brw
, prog
, stage_state
, constants
,
250 prog_data
->pull_param
,
251 prog_data
->nr_pull_params
);
254 for (i
= 0; i
< ALIGN(prog_data
->nr_pull_params
, 4) / 4; i
++) {
255 const gl_constant_value
*row
= &constants
[i
* 4];
256 fprintf(stderr
, "const surface %3d: %4.3f %4.3f %4.3f %4.3f\n",
257 i
, row
[0].f
, row
[1].f
, row
[2].f
, row
[3].f
);
261 brw_create_constant_surface(brw
, const_bo
, const_offset
, size
,
262 &stage_state
->surf_offset
[surf_index
]);
263 brw_bo_unreference(const_bo
);
265 brw
->ctx
.NewDriverState
|= brw_new_constbuf
;
269 * Creates a region containing the push constants for the CS on gen7+.
271 * Push constants are constant values (such as GLSL uniforms) that are
272 * pre-loaded into a shader stage's register space at thread spawn time.
274 * For other stages, see brw_curbe.c:brw_upload_constant_buffer for the
275 * equivalent gen4/5 code and gen6_vs_state.c:gen6_upload_push_constants for
279 brw_upload_cs_push_constants(struct brw_context
*brw
,
280 const struct gl_program
*prog
,
281 const struct brw_cs_prog_data
*cs_prog_data
,
282 struct brw_stage_state
*stage_state
)
284 struct gl_context
*ctx
= &brw
->ctx
;
285 const struct brw_stage_prog_data
*prog_data
=
286 (struct brw_stage_prog_data
*) cs_prog_data
;
288 /* Updates the ParamaterValues[i] pointers for all parameters of the
289 * basic type of PROGRAM_STATE_VAR.
291 /* XXX: Should this happen somewhere before to get our state flag set? */
292 _mesa_load_state_parameters(ctx
, prog
->Parameters
);
294 if (cs_prog_data
->push
.total
.size
== 0) {
295 stage_state
->push_const_size
= 0;
301 brw_state_batch(brw
, ALIGN(cs_prog_data
->push
.total
.size
, 64),
302 64, &stage_state
->push_const_offset
);
305 STATIC_ASSERT(sizeof(gl_constant_value
) == sizeof(float));
307 if (cs_prog_data
->push
.cross_thread
.size
> 0) {
308 uint32_t *param_copy
= param
;
310 i
< cs_prog_data
->push
.cross_thread
.dwords
;
312 assert(prog_data
->param
[i
] != BRW_PARAM_BUILTIN_THREAD_LOCAL_ID
);
313 param_copy
[i
] = brw_param_value(brw
, prog
, stage_state
,
314 prog_data
->param
[i
]);
318 if (cs_prog_data
->push
.per_thread
.size
> 0) {
319 for (unsigned t
= 0; t
< cs_prog_data
->threads
; t
++) {
321 8 * (cs_prog_data
->push
.per_thread
.regs
* t
+
322 cs_prog_data
->push
.cross_thread
.regs
);
323 unsigned src
= cs_prog_data
->push
.cross_thread
.dwords
;
324 for ( ; src
< prog_data
->nr_params
; src
++, dst
++) {
325 if (prog_data
->param
[src
] == BRW_PARAM_BUILTIN_THREAD_LOCAL_ID
) {
326 param
[dst
] = t
* cs_prog_data
->simd_size
;
328 param
[dst
] = brw_param_value(brw
, prog
, stage_state
,
329 prog_data
->param
[src
]);
335 stage_state
->push_const_size
=
336 cs_prog_data
->push
.cross_thread
.regs
+
337 cs_prog_data
->push
.per_thread
.regs
;