v3d: refactor some code from v3d40_vir_emit_image_load_store
[mesa.git] / src / broadcom / compiler / v3d40_tex.c
1 /*
2 * Copyright © 2016-2018 Broadcom
3 *
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:
10 *
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
13 * Software.
14 *
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
21 * IN THE SOFTWARE.
22 */
23
24 #include "v3d_compiler.h"
25 #include "compiler/nir/nir_deref.h"
26
27 /* We don't do any address packing. */
28 #define __gen_user_data void
29 #define __gen_address_type uint32_t
30 #define __gen_address_offset(reloc) (*reloc)
31 #define __gen_emit_reloc(cl, reloc)
32 #include "cle/v3d_packet_v41_pack.h"
33
34 static void
35 vir_TMU_WRITE(struct v3d_compile *c, enum v3d_qpu_waddr waddr, struct qreg val,
36 int *tmu_writes)
37 {
38 /* XXX perf: We should figure out how to merge ALU operations
39 * producing the val with this MOV, when possible.
40 */
41 vir_MOV_dest(c, vir_reg(QFILE_MAGIC, waddr), val);
42
43 (*tmu_writes)++;
44 }
45
46 static void
47 vir_WRTMUC(struct v3d_compile *c, enum quniform_contents contents, uint32_t data)
48 {
49 struct qinst *inst = vir_NOP(c);
50 inst->qpu.sig.wrtmuc = true;
51 inst->uniform = vir_get_uniform_index(c, contents, data);
52 }
53
54 static const struct V3D41_TMU_CONFIG_PARAMETER_1 p1_unpacked_default = {
55 .per_pixel_mask_enable = true,
56 };
57
58 static const struct V3D41_TMU_CONFIG_PARAMETER_2 p2_unpacked_default = {
59 .op = V3D_TMU_OP_REGULAR,
60 };
61
62 void
63 v3d40_vir_emit_tex(struct v3d_compile *c, nir_tex_instr *instr)
64 {
65 unsigned unit = instr->texture_index;
66 int tmu_writes = 0;
67
68 struct V3D41_TMU_CONFIG_PARAMETER_0 p0_unpacked = {
69 };
70
71 struct V3D41_TMU_CONFIG_PARAMETER_1 p1_unpacked = {
72 .output_type_32_bit = (c->key->tex[unit].return_size == 32 &&
73 !instr->is_shadow),
74
75 .unnormalized_coordinates = (instr->sampler_dim ==
76 GLSL_SAMPLER_DIM_RECT),
77 };
78
79 struct V3D41_TMU_CONFIG_PARAMETER_2 p2_unpacked = {
80 .op = V3D_TMU_OP_REGULAR,
81
82 .gather_mode = instr->op == nir_texop_tg4,
83 .gather_component = instr->component,
84
85 .coefficient_mode = instr->op == nir_texop_txd,
86
87 .disable_autolod = instr->op == nir_texop_tg4
88 };
89
90 int non_array_components = instr->coord_components - instr->is_array;
91 struct qreg s;
92
93 for (unsigned i = 0; i < instr->num_srcs; i++) {
94 switch (instr->src[i].src_type) {
95 case nir_tex_src_coord:
96 /* S triggers the lookup, so save it for the end. */
97 s = ntq_get_src(c, instr->src[i].src, 0);
98
99 if (non_array_components > 1) {
100 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUT,
101 ntq_get_src(c, instr->src[i].src,
102 1), &tmu_writes);
103 }
104 if (non_array_components > 2) {
105 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUR,
106 ntq_get_src(c, instr->src[i].src,
107 2), &tmu_writes);
108 }
109
110 if (instr->is_array) {
111 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUI,
112 ntq_get_src(c, instr->src[i].src,
113 instr->coord_components - 1),
114 &tmu_writes);
115 }
116 break;
117
118 case nir_tex_src_bias:
119 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUB,
120 ntq_get_src(c, instr->src[i].src, 0),
121 &tmu_writes);
122 break;
123
124 case nir_tex_src_lod:
125 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUB,
126 ntq_get_src(c, instr->src[i].src, 0),
127 &tmu_writes);
128
129 if (instr->op != nir_texop_txf)
130 p2_unpacked.disable_autolod = true;
131 break;
132
133 case nir_tex_src_comparator:
134 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUDREF,
135 ntq_get_src(c, instr->src[i].src, 0),
136 &tmu_writes);
137 break;
138
139 case nir_tex_src_offset: {
140 if (nir_src_is_const(instr->src[i].src)) {
141 p2_unpacked.offset_s = nir_src_comp_as_int(instr->src[i].src, 0);
142 if (instr->coord_components >= 2)
143 p2_unpacked.offset_t =
144 nir_src_comp_as_int(instr->src[i].src, 1);
145 if (non_array_components >= 3)
146 p2_unpacked.offset_r =
147 nir_src_comp_as_int(instr->src[i].src, 2);
148 } else {
149 struct qreg mask = vir_uniform_ui(c, 0xf);
150 struct qreg x, y, offset;
151
152 x = vir_AND(c, ntq_get_src(c, instr->src[i].src,
153 0), mask);
154 y = vir_AND(c, ntq_get_src(c, instr->src[i].src,
155 1), mask);
156 offset = vir_OR(c, x,
157 vir_SHL(c, y,
158 vir_uniform_ui(c, 4)));
159
160 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUOFF,
161 offset, &tmu_writes);
162 }
163 break;
164 }
165
166 default:
167 unreachable("unknown texture source");
168 }
169 }
170
171 /* Limit the number of channels returned to both how many the NIR
172 * instruction writes and how many the instruction could produce.
173 */
174 assert(instr->dest.is_ssa);
175 p0_unpacked.return_words_of_texture_data =
176 nir_ssa_def_components_read(&instr->dest.ssa);
177
178 /* Word enables can't ask for more channels than the output type could
179 * provide (2 for f16, 4 for 32-bit).
180 */
181 assert(!p1_unpacked.output_type_32_bit ||
182 p0_unpacked.return_words_of_texture_data < (1 << 4));
183 assert(p1_unpacked.output_type_32_bit ||
184 p0_unpacked.return_words_of_texture_data < (1 << 2));
185
186 assert(p0_unpacked.return_words_of_texture_data != 0);
187
188 uint32_t p0_packed;
189 V3D41_TMU_CONFIG_PARAMETER_0_pack(NULL,
190 (uint8_t *)&p0_packed,
191 &p0_unpacked);
192
193 uint32_t p1_packed;
194 V3D41_TMU_CONFIG_PARAMETER_1_pack(NULL,
195 (uint8_t *)&p1_packed,
196 &p1_unpacked);
197
198 uint32_t p2_packed;
199 V3D41_TMU_CONFIG_PARAMETER_2_pack(NULL,
200 (uint8_t *)&p2_packed,
201 &p2_unpacked);
202
203 /* Load unit number into the high bits of the texture or sampler
204 * address field, which will be be used by the driver to decide which
205 * texture to put in the actual address field.
206 */
207 p0_packed |= unit << 24;
208 p1_packed |= unit << 24;
209
210 vir_WRTMUC(c, QUNIFORM_TMU_CONFIG_P0, p0_packed);
211 /* XXX perf: Can we skip p1 setup for txf ops? */
212 vir_WRTMUC(c, QUNIFORM_TMU_CONFIG_P1, p1_packed);
213 if (memcmp(&p2_unpacked, &p2_unpacked_default, sizeof(p2_unpacked)) != 0)
214 vir_WRTMUC(c, QUNIFORM_CONSTANT, p2_packed);
215
216 if (instr->op == nir_texop_txf) {
217 assert(instr->sampler_dim != GLSL_SAMPLER_DIM_CUBE);
218 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUSF, s, &tmu_writes);
219 } else if (instr->sampler_dim == GLSL_SAMPLER_DIM_CUBE) {
220 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUSCM, s, &tmu_writes);
221 } else {
222 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUS, s, &tmu_writes);
223 }
224
225 vir_emit_thrsw(c);
226
227 /* The input FIFO has 16 slots across all threads, so make sure we
228 * don't overfill our allocation.
229 */
230 while (tmu_writes > 16 / c->threads)
231 c->threads /= 2;
232
233 for (int i = 0; i < 4; i++) {
234 if (p0_unpacked.return_words_of_texture_data & (1 << i))
235 ntq_store_dest(c, &instr->dest, i, vir_LDTMU(c));
236 }
237 }
238
239 static void
240 type_size_align_1(const struct glsl_type *type, unsigned *size, unsigned *align)
241 {
242 *size = 1;
243 *align = 1;
244 }
245
246 static uint32_t
247 v3d40_image_load_store_tmu_op(nir_intrinsic_instr *instr)
248 {
249 switch (instr->intrinsic) {
250 case nir_intrinsic_image_deref_load:
251 case nir_intrinsic_image_deref_store:
252 return V3D_TMU_OP_REGULAR;
253 case nir_intrinsic_image_deref_atomic_add:
254 return V3D_TMU_OP_WRITE_ADD_READ_PREFETCH;
255 case nir_intrinsic_image_deref_atomic_min:
256 return V3D_TMU_OP_WRITE_UMIN_FULL_L1_CLEAR;
257 case nir_intrinsic_image_deref_atomic_max:
258 return V3D_TMU_OP_WRITE_UMAX;
259 case nir_intrinsic_image_deref_atomic_and:
260 return V3D_TMU_OP_WRITE_AND_READ_INC;
261 case nir_intrinsic_image_deref_atomic_or:
262 return V3D_TMU_OP_WRITE_OR_READ_DEC;
263 case nir_intrinsic_image_deref_atomic_xor:
264 return V3D_TMU_OP_WRITE_XOR_READ_NOT;
265 case nir_intrinsic_image_deref_atomic_exchange:
266 return V3D_TMU_OP_WRITE_XCHG_READ_FLUSH;
267 case nir_intrinsic_image_deref_atomic_comp_swap:
268 return V3D_TMU_OP_WRITE_CMPXCHG_READ_FLUSH;
269 default:
270 unreachable("unknown image intrinsic");
271 };
272 }
273
274 void
275 v3d40_vir_emit_image_load_store(struct v3d_compile *c,
276 nir_intrinsic_instr *instr)
277 {
278 nir_variable *var = nir_intrinsic_get_var(instr, 0);
279 const struct glsl_type *sampler_type = glsl_without_array(var->type);
280 unsigned unit = (var->data.driver_location +
281 nir_deref_instr_get_const_offset(nir_src_as_deref(instr->src[0]),
282 type_size_align_1));
283 int tmu_writes = 0;
284
285 struct V3D41_TMU_CONFIG_PARAMETER_0 p0_unpacked = {
286 };
287
288 struct V3D41_TMU_CONFIG_PARAMETER_1 p1_unpacked = {
289 .per_pixel_mask_enable = true,
290 .output_type_32_bit = v3d_gl_format_is_return_32(var->data.image.format),
291 };
292
293 struct V3D41_TMU_CONFIG_PARAMETER_2 p2_unpacked = { 0 };
294
295 /* XXX perf: We should turn add/sub of 1 to inc/dec. Perhaps NIR
296 * wants to have support for inc/dec?
297 */
298 p2_unpacked.op = v3d40_image_load_store_tmu_op(instr);
299
300 bool is_1d = false;
301 switch (glsl_get_sampler_dim(sampler_type)) {
302 case GLSL_SAMPLER_DIM_1D:
303 is_1d = true;
304 break;
305 case GLSL_SAMPLER_DIM_BUF:
306 break;
307 case GLSL_SAMPLER_DIM_2D:
308 case GLSL_SAMPLER_DIM_RECT:
309 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUT,
310 ntq_get_src(c, instr->src[1], 1), &tmu_writes);
311 break;
312 case GLSL_SAMPLER_DIM_3D:
313 case GLSL_SAMPLER_DIM_CUBE:
314 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUT,
315 ntq_get_src(c, instr->src[1], 1), &tmu_writes);
316 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUR,
317 ntq_get_src(c, instr->src[1], 2), &tmu_writes);
318 break;
319 default:
320 unreachable("bad image sampler dim");
321 }
322
323 if (glsl_sampler_type_is_array(sampler_type)) {
324 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUI,
325 ntq_get_src(c, instr->src[1],
326 is_1d ? 1 : 2), &tmu_writes);
327 }
328
329 /* Limit the number of channels returned to both how many the NIR
330 * instruction writes and how many the instruction could produce.
331 */
332 uint32_t instr_return_channels = nir_intrinsic_dest_components(instr);
333 if (!p1_unpacked.output_type_32_bit)
334 instr_return_channels = (instr_return_channels + 1) / 2;
335
336 p0_unpacked.return_words_of_texture_data =
337 (1 << instr_return_channels) - 1;
338
339 uint32_t p0_packed;
340 V3D41_TMU_CONFIG_PARAMETER_0_pack(NULL,
341 (uint8_t *)&p0_packed,
342 &p0_unpacked);
343
344 uint32_t p1_packed;
345 V3D41_TMU_CONFIG_PARAMETER_1_pack(NULL,
346 (uint8_t *)&p1_packed,
347 &p1_unpacked);
348
349 uint32_t p2_packed;
350 V3D41_TMU_CONFIG_PARAMETER_2_pack(NULL,
351 (uint8_t *)&p2_packed,
352 &p2_unpacked);
353
354 /* Load unit number into the high bits of the texture or sampler
355 * address field, which will be be used by the driver to decide which
356 * texture to put in the actual address field.
357 */
358 p0_packed |= unit << 24;
359
360 vir_WRTMUC(c, QUNIFORM_IMAGE_TMU_CONFIG_P0, p0_packed);
361 if (memcmp(&p1_unpacked, &p1_unpacked_default, sizeof(p1_unpacked)) != 0)
362 vir_WRTMUC(c, QUNIFORM_CONSTANT, p1_packed);
363 if (memcmp(&p2_unpacked, &p2_unpacked_default, sizeof(p2_unpacked)) != 0)
364 vir_WRTMUC(c, QUNIFORM_CONSTANT, p2_packed);
365
366 /* Emit the data writes for atomics or image store. */
367 if (instr->intrinsic != nir_intrinsic_image_deref_load) {
368 /* Vector for stores, or first atomic argument */
369 struct qreg src[4];
370 for (int i = 0; i < nir_intrinsic_src_components(instr, 3); i++) {
371 src[i] = ntq_get_src(c, instr->src[3], i);
372 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUD, src[i],
373 &tmu_writes);
374 }
375
376 /* Second atomic argument */
377 if (instr->intrinsic ==
378 nir_intrinsic_image_deref_atomic_comp_swap) {
379 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUD,
380 ntq_get_src(c, instr->src[4], 0),
381 &tmu_writes);
382 }
383 }
384
385 vir_TMU_WRITE(c, V3D_QPU_WADDR_TMUSF, ntq_get_src(c, instr->src[1], 0),
386 &tmu_writes);
387
388 vir_emit_thrsw(c);
389
390 /* The input FIFO has 16 slots across all threads, so make sure we
391 * don't overfill our allocation.
392 */
393 while (tmu_writes > 16 / c->threads)
394 c->threads /= 2;
395
396 for (int i = 0; i < 4; i++) {
397 if (p0_unpacked.return_words_of_texture_data & (1 << i))
398 ntq_store_dest(c, &instr->dest, i, vir_LDTMU(c));
399 }
400
401 if (nir_intrinsic_dest_components(instr) == 0)
402 vir_TMUWT(c);
403 }