2 * Copyright 2012 Advanced Micro Devices, Inc.
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 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
24 * Tom Stellard <thomas.stellard@amd.com>
25 * Michel Dänzer <michel.daenzer@amd.com>
26 * Christian König <christian.koenig@amd.com>
29 /* How linking shader inputs and outputs between vertex, tessellation, and
30 * geometry shaders works.
32 * Inputs and outputs between shaders are stored in a buffer. This buffer
33 * lives in LDS (typical case for tessellation), but it can also live
34 * in memory (ESGS). Each input or output has a fixed location within a vertex.
35 * The highest used input or output determines the stride between vertices.
37 * Since GS and tessellation are only possible in the OpenGL core profile,
38 * only these semantics are valid for per-vertex data:
45 * CULLDIST0..1 (not implemented)
48 * For example, a shader only writing GENERIC0 has the output stride of 5.
50 * Only these semantics are valid for per-patch data:
58 * That's how independent shaders agree on input and output locations.
59 * The si_shader_io_get_unique_index function assigns the locations.
61 * For tessellation, other required information for calculating the input and
62 * output addresses like the vertex stride, the patch stride, and the offsets
63 * where per-vertex and per-patch data start, is passed to the shader via
64 * user data SGPRs. The offsets and strides are calculated at draw time and
65 * aren't available at compile time.
71 #include <llvm-c/Core.h> /* LLVMModuleRef */
72 #include "tgsi/tgsi_scan.h"
75 struct radeon_shader_binary
;
76 struct radeon_shader_reloc
;
78 #define SI_SGPR_RW_BUFFERS 0 /* rings (& stream-out, VS only) */
79 #define SI_SGPR_CONST_BUFFERS 2
80 #define SI_SGPR_SAMPLERS 4 /* images & sampler states interleaved */
82 #define SI_SGPR_VERTEX_BUFFERS 8 /* VS only */
83 #define SI_SGPR_BASE_VERTEX 10 /* VS only */
84 #define SI_SGPR_START_INSTANCE 11 /* VS only */
85 #define SI_SGPR_VS_STATE_BITS 12 /* VS(VS) only */
86 #define SI_SGPR_LS_OUT_LAYOUT 12 /* VS(LS) only */
87 #define SI_SGPR_TCS_OUT_OFFSETS 8 /* TCS & TES only */
88 #define SI_SGPR_TCS_OUT_LAYOUT 9 /* TCS & TES only */
89 #define SI_SGPR_TCS_IN_LAYOUT 10 /* TCS only */
90 #define SI_SGPR_ALPHA_REF 8 /* PS only */
92 #define SI_VS_NUM_USER_SGPR 13 /* API VS */
93 #define SI_ES_NUM_USER_SGPR 12 /* API VS */
94 #define SI_LS_NUM_USER_SGPR 13 /* API VS */
95 #define SI_TCS_NUM_USER_SGPR 11
96 #define SI_TES_NUM_USER_SGPR 10
97 #define SI_GS_NUM_USER_SGPR 8
98 #define SI_GSCOPY_NUM_USER_SGPR 4
99 #define SI_PS_NUM_USER_SGPR 9
101 /* LLVM function parameter indices */
102 #define SI_PARAM_RW_BUFFERS 0
103 #define SI_PARAM_CONST_BUFFERS 1
104 #define SI_PARAM_SAMPLERS 2
105 #define SI_PARAM_UNUSED 3 /* TODO: use */
107 /* VS only parameters */
108 #define SI_PARAM_VERTEX_BUFFERS 4
109 #define SI_PARAM_BASE_VERTEX 5
110 #define SI_PARAM_START_INSTANCE 6
111 /* [0] = clamp vertex color */
112 #define SI_PARAM_VS_STATE_BITS 7
113 /* the other VS parameters are assigned dynamically */
115 /* Offsets where TCS outputs and TCS patch outputs live in LDS:
116 * [0:15] = TCS output patch0 offset / 16, max = NUM_PATCHES * 32 * 32
117 * [16:31] = TCS output patch0 offset for per-patch / 16, max = NUM_PATCHES*32*32* + 32*32
119 #define SI_PARAM_TCS_OUT_OFFSETS 4 /* for TCS & TES */
121 /* Layout of TCS outputs / TES inputs:
122 * [0:12] = stride between output patches in dwords, num_outputs * num_vertices * 4, max = 32*32*4
123 * [13:20] = stride between output vertices in dwords = num_inputs * 4, max = 32*4
124 * [26:31] = gl_PatchVerticesIn, max = 32
126 #define SI_PARAM_TCS_OUT_LAYOUT 5 /* for TCS & TES */
128 /* Layout of LS outputs / TCS inputs
129 * [0:12] = stride between patches in dwords = num_inputs * num_vertices * 4, max = 32*32*4
130 * [13:20] = stride between vertices in dwords = num_inputs * 4, max = 32*4
132 #define SI_PARAM_TCS_IN_LAYOUT 6 /* TCS only */
133 #define SI_PARAM_LS_OUT_LAYOUT 7 /* same value as TCS_IN_LAYOUT, LS only */
135 /* TCS only parameters. */
136 #define SI_PARAM_TESS_FACTOR_OFFSET 7
137 #define SI_PARAM_PATCH_ID 8
138 #define SI_PARAM_REL_IDS 9
140 /* GS only parameters */
141 #define SI_PARAM_GS2VS_OFFSET 4
142 #define SI_PARAM_GS_WAVE_ID 5
143 #define SI_PARAM_VTX0_OFFSET 6
144 #define SI_PARAM_VTX1_OFFSET 7
145 #define SI_PARAM_PRIMITIVE_ID 8
146 #define SI_PARAM_VTX2_OFFSET 9
147 #define SI_PARAM_VTX3_OFFSET 10
148 #define SI_PARAM_VTX4_OFFSET 11
149 #define SI_PARAM_VTX5_OFFSET 12
150 #define SI_PARAM_GS_INSTANCE_ID 13
152 /* PS only parameters */
153 #define SI_PARAM_ALPHA_REF 4
154 #define SI_PARAM_PRIM_MASK 5
155 #define SI_PARAM_PERSP_SAMPLE 6
156 #define SI_PARAM_PERSP_CENTER 7
157 #define SI_PARAM_PERSP_CENTROID 8
158 #define SI_PARAM_PERSP_PULL_MODEL 9
159 #define SI_PARAM_LINEAR_SAMPLE 10
160 #define SI_PARAM_LINEAR_CENTER 11
161 #define SI_PARAM_LINEAR_CENTROID 12
162 #define SI_PARAM_LINE_STIPPLE_TEX 13
163 #define SI_PARAM_POS_X_FLOAT 14
164 #define SI_PARAM_POS_Y_FLOAT 15
165 #define SI_PARAM_POS_Z_FLOAT 16
166 #define SI_PARAM_POS_W_FLOAT 17
167 #define SI_PARAM_FRONT_FACE 18
168 #define SI_PARAM_ANCILLARY 19
169 #define SI_PARAM_SAMPLE_COVERAGE 20
170 #define SI_PARAM_POS_FIXED_PT 21
172 #define SI_NUM_PARAMS (SI_PARAM_POS_FIXED_PT + 1)
176 /* A shader selector is a gallium CSO and contains shader variants and
177 * binaries for one TGSI program. This can be shared by multiple contexts.
179 struct si_shader_selector
{
181 struct si_shader
*first_variant
; /* immutable after the first variant */
182 struct si_shader
*last_variant
; /* mutable */
184 struct tgsi_token
*tokens
;
185 struct pipe_stream_output_info so
;
186 struct tgsi_shader_info info
;
188 /* PIPE_SHADER_[VERTEX|FRAGMENT|...] */
192 unsigned esgs_itemsize
;
193 unsigned gs_input_verts_per_prim
;
194 unsigned gs_output_prim
;
195 unsigned gs_max_out_vertices
;
196 unsigned gs_num_invocations
;
197 unsigned max_gs_stream
; /* count - 1 */
198 unsigned gsvs_vertex_size
;
199 unsigned max_gsvs_emit_size
;
202 unsigned db_shader_control
;
203 /* Set 0xf or 0x0 (4 bits) per each written output.
204 * ANDed with spi_shader_col_format.
206 unsigned colors_written_4bit
;
208 /* masks of "get_unique_index" bits */
209 uint64_t outputs_written
;
210 uint32_t patch_outputs_written
;
213 /* Valid shader configurations:
215 * API shaders VS | TCS | TES | GS |pass| PS
216 * are compiled as: | | | |thru|
218 * Only VS & PS: VS | -- | -- | -- | -- | PS
219 * With GS: ES | -- | -- | GS | VS | PS
220 * With Tessel.: LS | HS | VS | -- | -- | PS
221 * With both: LS | HS | ES | GS | VS | PS
224 /* Common VS bits between the shader key and the prolog key. */
225 struct si_vs_prolog_bits
{
226 unsigned instance_divisors
[SI_NUM_VERTEX_BUFFERS
];
229 /* Common VS bits between the shader key and the epilog key. */
230 struct si_vs_epilog_bits
{
231 unsigned export_prim_id
:1; /* when PS needs it and GS is disabled */
233 * - skip clipdist, culldist (including clipvertex code) exports based
234 * on which clip_plane_enable bits are set
235 * - skip layer, viewport, clipdist, and culldist parameter exports
236 * if PS doesn't read them
240 /* Common TCS bits between the shader key and the epilog key. */
241 struct si_tcs_epilog_bits
{
242 unsigned prim_mode
:3;
245 /* Common PS bits between the shader key and the prolog key. */
246 struct si_ps_prolog_bits
{
247 unsigned color_two_side
:1;
248 /* TODO: add a flatshade bit that skips interpolation for colors */
249 unsigned poly_stipple
:1;
250 unsigned force_persample_interp
:1;
252 * - add force_center_interp if MSAA is disabled and centroid or
254 * - add force_center_interp_bc_optimize to force center interpolation
255 * based on the bc_optimize SGPR bit if MSAA is enabled, centroid is
256 * present and sample isn't present.
260 /* Common PS bits between the shader key and the epilog key. */
261 struct si_ps_epilog_bits
{
262 unsigned spi_shader_col_format
;
263 unsigned color_is_int8
:8;
264 unsigned last_cbuf
:3;
265 unsigned alpha_func
:3;
266 unsigned alpha_to_one
:1;
267 unsigned poly_line_smoothing
:1;
268 unsigned clamp_color
:1;
271 union si_shader_key
{
273 struct si_ps_prolog_bits prolog
;
274 struct si_ps_epilog_bits epilog
;
277 struct si_vs_prolog_bits prolog
;
278 struct si_vs_epilog_bits epilog
;
279 unsigned as_es
:1; /* export shader */
280 unsigned as_ls
:1; /* local shader */
283 struct si_tcs_epilog_bits epilog
;
284 } tcs
; /* tessellation control shader */
286 struct si_vs_epilog_bits epilog
; /* same as VS */
287 unsigned as_es
:1; /* export shader */
288 } tes
; /* tessellation evaluation shader */
291 struct si_shader_config
{
295 unsigned spi_ps_input_ena
;
296 unsigned spi_ps_input_addr
;
298 unsigned scratch_bytes_per_wave
;
304 struct si_shader_selector
*selector
;
305 struct si_shader
*next_variant
;
307 struct si_shader
*gs_copy_shader
;
308 struct si_pm4_state
*pm4
;
309 struct r600_resource
*bo
;
310 struct r600_resource
*scratch_bo
;
311 union si_shader_key key
;
312 struct radeon_shader_binary binary
;
313 struct si_shader_config config
;
315 ubyte num_input_sgprs
;
316 ubyte num_input_vgprs
;
317 char face_vgpr_index
;
319 unsigned vs_output_param_offset
[PIPE_MAX_SHADER_OUTPUTS
];
320 bool uses_instanceid
;
321 unsigned nr_pos_exports
;
322 unsigned nr_param_exports
;
325 static inline struct tgsi_shader_info
*si_get_vs_info(struct si_context
*sctx
)
327 if (sctx
->gs_shader
.cso
)
328 return &sctx
->gs_shader
.cso
->info
;
329 else if (sctx
->tes_shader
.cso
)
330 return &sctx
->tes_shader
.cso
->info
;
331 else if (sctx
->vs_shader
.cso
)
332 return &sctx
->vs_shader
.cso
->info
;
337 static inline struct si_shader
* si_get_vs_state(struct si_context
*sctx
)
339 if (sctx
->gs_shader
.current
)
340 return sctx
->gs_shader
.current
->gs_copy_shader
;
341 else if (sctx
->tes_shader
.current
)
342 return sctx
->tes_shader
.current
;
344 return sctx
->vs_shader
.current
;
347 static inline bool si_vs_exports_prim_id(struct si_shader
*shader
)
349 if (shader
->selector
->type
== PIPE_SHADER_VERTEX
)
350 return shader
->key
.vs
.epilog
.export_prim_id
;
351 else if (shader
->selector
->type
== PIPE_SHADER_TESS_EVAL
)
352 return shader
->key
.tes
.epilog
.export_prim_id
;
357 /* radeonsi_shader.c */
358 int si_shader_create(struct si_screen
*sscreen
, LLVMTargetMachineRef tm
,
359 struct si_shader
*shader
,
360 struct pipe_debug_callback
*debug
);
361 void si_dump_shader_key(unsigned shader
, union si_shader_key
*key
, FILE *f
);
362 int si_compile_llvm(struct si_screen
*sscreen
,
363 struct radeon_shader_binary
*binary
,
364 struct si_shader_config
*conf
,
365 LLVMTargetMachineRef tm
,
367 struct pipe_debug_callback
*debug
,
370 void si_shader_destroy(struct si_shader
*shader
);
371 unsigned si_shader_io_get_unique_index(unsigned semantic_name
, unsigned index
);
372 int si_shader_binary_upload(struct si_screen
*sscreen
, struct si_shader
*shader
);
373 void si_shader_dump(struct si_screen
*sscreen
, struct si_shader
*shader
,
374 struct pipe_debug_callback
*debug
, unsigned processor
);
375 void si_shader_apply_scratch_relocs(struct si_context
*sctx
,
376 struct si_shader
*shader
,
377 uint64_t scratch_va
);
378 void si_shader_binary_read_config(struct radeon_shader_binary
*binary
,
379 struct si_shader_config
*conf
,
380 unsigned symbol_offset
);