1 /*
2 * Copyright 2014 Advanced Micro Devices, Inc.
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors: Marek Olšák <maraeo@gmail.com>
24 *
25 */
26
27 #include "r600_cs.h"
28 #include "evergreend.h"
29
30 /* 2xMSAA
31 * There are two locations (4, 4), (-4, -4). */
32 const uint32_t eg_sample_locs_2x[4] = {
33 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
34 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
35 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
36 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
37 };
38 const unsigned eg_max_dist_2x = 4;
39 /* 4xMSAA
40 * There are 4 locations: (-2, 6), (6, -2), (-6, 2), (2, 6). */
41 const uint32_t eg_sample_locs_4x[4] = {
42 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
43 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
44 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
45 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
46 };
47 const unsigned eg_max_dist_4x = 6;
48
49 /* Cayman 8xMSAA */
50 static const uint32_t cm_sample_locs_8x[] = {
51 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
52 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
53 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
54 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
55 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
56 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
57 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
58 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
59 };
60 static const unsigned cm_max_dist_8x = 8;
61 /* Cayman 16xMSAA */
62 static const uint32_t cm_sample_locs_16x[] = {
63 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
64 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
65 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
66 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
67 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
68 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
69 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
70 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
71 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
72 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
73 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
74 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
75 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
76 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
77 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
78 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
79 };
80 static const unsigned cm_max_dist_16x = 8;
81
cayman_get_sample_position(struct pipe_context * ctx,unsigned sample_count,unsigned sample_index,float * out_value)82 void cayman_get_sample_position(struct pipe_context *ctx, unsigned sample_count,
83 unsigned sample_index, float *out_value)
84 {
85 int offset, index;
86 struct {
87 int idx:4;
88 } val;
89 switch (sample_count) {
90 case 1:
91 default:
92 out_value[0] = out_value[1] = 0.5;
93 break;
94 case 2:
95 offset = 4 * (sample_index * 2);
96 val.idx = (eg_sample_locs_2x[0] >> offset) & 0xf;
97 out_value[0] = (float)(val.idx + 8) / 16.0f;
98 val.idx = (eg_sample_locs_2x[0] >> (offset + 4)) & 0xf;
99 out_value[1] = (float)(val.idx + 8) / 16.0f;
100 break;
101 case 4:
102 offset = 4 * (sample_index * 2);
103 val.idx = (eg_sample_locs_4x[0] >> offset) & 0xf;
104 out_value[0] = (float)(val.idx + 8) / 16.0f;
105 val.idx = (eg_sample_locs_4x[0] >> (offset + 4)) & 0xf;
106 out_value[1] = (float)(val.idx + 8) / 16.0f;
107 break;
108 case 8:
109 offset = 4 * (sample_index % 4 * 2);
110 index = (sample_index / 4) * 4;
111 val.idx = (cm_sample_locs_8x[index] >> offset) & 0xf;
112 out_value[0] = (float)(val.idx + 8) / 16.0f;
113 val.idx = (cm_sample_locs_8x[index] >> (offset + 4)) & 0xf;
114 out_value[1] = (float)(val.idx + 8) / 16.0f;
115 break;
116 case 16:
117 offset = 4 * (sample_index % 4 * 2);
118 index = (sample_index / 4) * 4;
119 val.idx = (cm_sample_locs_16x[index] >> offset) & 0xf;
120 out_value[0] = (float)(val.idx + 8) / 16.0f;
121 val.idx = (cm_sample_locs_16x[index] >> (offset + 4)) & 0xf;
122 out_value[1] = (float)(val.idx + 8) / 16.0f;
123 break;
124 }
125 }
126
cayman_init_msaa(struct pipe_context * ctx)127 void cayman_init_msaa(struct pipe_context *ctx)
128 {
129 struct r600_common_context *rctx = (struct r600_common_context*)ctx;
130 int i;
131
132 cayman_get_sample_position(ctx, 1, 0, rctx->sample_locations_1x[0]);
133
134 for (i = 0; i < 2; i++)
135 cayman_get_sample_position(ctx, 2, i, rctx->sample_locations_2x[i]);
136 for (i = 0; i < 4; i++)
137 cayman_get_sample_position(ctx, 4, i, rctx->sample_locations_4x[i]);
138 for (i = 0; i < 8; i++)
139 cayman_get_sample_position(ctx, 8, i, rctx->sample_locations_8x[i]);
140 for (i = 0; i < 16; i++)
141 cayman_get_sample_position(ctx, 16, i, rctx->sample_locations_16x[i]);
142 }
143
cayman_emit_msaa_sample_locs(struct radeon_cmdbuf * cs,int nr_samples)144 static void cayman_emit_msaa_sample_locs(struct radeon_cmdbuf *cs, int nr_samples)
145 {
146 switch (nr_samples) {
147 default:
148 case 1:
149 radeon_set_context_reg(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 0);
150 radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, 0);
151 radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, 0);
152 radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, 0);
153 break;
154 case 2:
155 radeon_set_context_reg(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, eg_sample_locs_2x[0]);
156 radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, eg_sample_locs_2x[1]);
157 radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, eg_sample_locs_2x[2]);
158 radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, eg_sample_locs_2x[3]);
159 break;
160 case 4:
161 radeon_set_context_reg(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, eg_sample_locs_4x[0]);
162 radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, eg_sample_locs_4x[1]);
163 radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, eg_sample_locs_4x[2]);
164 radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, eg_sample_locs_4x[3]);
165 break;
166 case 8:
167 radeon_set_context_reg_seq(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 14);
168 radeon_emit(cs, cm_sample_locs_8x[0]);
169 radeon_emit(cs, cm_sample_locs_8x[4]);
170 radeon_emit(cs, 0);
171 radeon_emit(cs, 0);
172 radeon_emit(cs, cm_sample_locs_8x[1]);
173 radeon_emit(cs, cm_sample_locs_8x[5]);
174 radeon_emit(cs, 0);
175 radeon_emit(cs, 0);
176 radeon_emit(cs, cm_sample_locs_8x[2]);
177 radeon_emit(cs, cm_sample_locs_8x[6]);
178 radeon_emit(cs, 0);
179 radeon_emit(cs, 0);
180 radeon_emit(cs, cm_sample_locs_8x[3]);
181 radeon_emit(cs, cm_sample_locs_8x[7]);
182 break;
183 case 16:
184 radeon_set_context_reg_seq(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 16);
185 radeon_emit(cs, cm_sample_locs_16x[0]);
186 radeon_emit(cs, cm_sample_locs_16x[4]);
187 radeon_emit(cs, cm_sample_locs_16x[8]);
188 radeon_emit(cs, cm_sample_locs_16x[12]);
189 radeon_emit(cs, cm_sample_locs_16x[1]);
190 radeon_emit(cs, cm_sample_locs_16x[5]);
191 radeon_emit(cs, cm_sample_locs_16x[9]);
192 radeon_emit(cs, cm_sample_locs_16x[13]);
193 radeon_emit(cs, cm_sample_locs_16x[2]);
194 radeon_emit(cs, cm_sample_locs_16x[6]);
195 radeon_emit(cs, cm_sample_locs_16x[10]);
196 radeon_emit(cs, cm_sample_locs_16x[14]);
197 radeon_emit(cs, cm_sample_locs_16x[3]);
198 radeon_emit(cs, cm_sample_locs_16x[7]);
199 radeon_emit(cs, cm_sample_locs_16x[11]);
200 radeon_emit(cs, cm_sample_locs_16x[15]);
201 break;
202 }
203 }
204
cayman_emit_msaa_state(struct radeon_cmdbuf * cs,int nr_samples,int ps_iter_samples,int overrast_samples)205 void cayman_emit_msaa_state(struct radeon_cmdbuf *cs, int nr_samples,
206 int ps_iter_samples, int overrast_samples)
207 {
208 int setup_samples = nr_samples > 1 ? nr_samples :
209 overrast_samples > 1 ? overrast_samples : 0;
210 /* Required by OpenGL line rasterization.
211 *
212 * TODO: We should also enable perpendicular endcaps for AA lines,
213 * but that requires implementing line stippling in the pixel
214 * shader. SC can only do line stippling with axis-aligned
215 * endcaps.
216 */
217 unsigned sc_line_cntl = S_028BDC_DX10_DIAMOND_TEST_ENA(1);
218 unsigned sc_mode_cntl_1 =
219 EG_S_028A4C_FORCE_EOV_CNTDWN_ENABLE(1) |
220 EG_S_028A4C_FORCE_EOV_REZ_ENABLE(1);
221
222 if (nr_samples > 1) {
223 cayman_emit_msaa_sample_locs(cs, nr_samples);
224 }
225
226 if (setup_samples > 1) {
227 /* indexed by log2(nr_samples) */
228 const unsigned max_dist[] = {
229 0,
230 eg_max_dist_2x,
231 eg_max_dist_4x,
232 cm_max_dist_8x,
233 cm_max_dist_16x
234 };
235 unsigned log_samples = util_logbase2(setup_samples);
236 unsigned log_ps_iter_samples =
237 util_logbase2(util_next_power_of_two(ps_iter_samples));
238
239 radeon_set_context_reg_seq(cs, CM_R_028BDC_PA_SC_LINE_CNTL, 2);
240 radeon_emit(cs, sc_line_cntl |
241 S_028BDC_EXPAND_LINE_WIDTH(1)); /* CM_R_028BDC_PA_SC_LINE_CNTL */
242 radeon_emit(cs, S_028BE0_MSAA_NUM_SAMPLES(log_samples) |
243 S_028BE0_MAX_SAMPLE_DIST(max_dist[log_samples]) |
244 S_028BE0_MSAA_EXPOSED_SAMPLES(log_samples)); /* CM_R_028BE0_PA_SC_AA_CONFIG */
245
246 if (nr_samples > 1) {
247 radeon_set_context_reg(cs, CM_R_028804_DB_EQAA,
248 S_028804_MAX_ANCHOR_SAMPLES(log_samples) |
249 S_028804_PS_ITER_SAMPLES(log_ps_iter_samples) |
250 S_028804_MASK_EXPORT_NUM_SAMPLES(log_samples) |
251 S_028804_ALPHA_TO_MASK_NUM_SAMPLES(log_samples) |
252 S_028804_HIGH_QUALITY_INTERSECTIONS(1) |
253 S_028804_STATIC_ANCHOR_ASSOCIATIONS(1));
254 radeon_set_context_reg(cs, EG_R_028A4C_PA_SC_MODE_CNTL_1,
255 EG_S_028A4C_PS_ITER_SAMPLE(ps_iter_samples > 1) |
256 sc_mode_cntl_1);
257 } else if (overrast_samples > 1) {
258 radeon_set_context_reg(cs, CM_R_028804_DB_EQAA,
259 S_028804_HIGH_QUALITY_INTERSECTIONS(1) |
260 S_028804_STATIC_ANCHOR_ASSOCIATIONS(1) |
261 S_028804_OVERRASTERIZATION_AMOUNT(log_samples));
262 radeon_set_context_reg(cs, EG_R_028A4C_PA_SC_MODE_CNTL_1,
263 sc_mode_cntl_1);
264 }
265 } else {
266 radeon_set_context_reg_seq(cs, CM_R_028BDC_PA_SC_LINE_CNTL, 2);
267 radeon_emit(cs, sc_line_cntl); /* CM_R_028BDC_PA_SC_LINE_CNTL */
268 radeon_emit(cs, 0); /* CM_R_028BE0_PA_SC_AA_CONFIG */
269
270 radeon_set_context_reg(cs, CM_R_028804_DB_EQAA,
271 S_028804_HIGH_QUALITY_INTERSECTIONS(1) |
272 S_028804_STATIC_ANCHOR_ASSOCIATIONS(1));
273 radeon_set_context_reg(cs, EG_R_028A4C_PA_SC_MODE_CNTL_1,
274 sc_mode_cntl_1);
275 }
276 }
277