1 /*
2  * Copyright (C) 2019 Collabora, Ltd.
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 (Collabora):
24  *   Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
25  */
26 
27 #ifndef __PAN_ENCODER_H
28 #define __PAN_ENCODER_H
29 
30 #include "util/macros.h"
31 #include "panfrost-quirks.h"
32 
33 #include <stdbool.h>
34 #include "util/format/u_format.h"
35 #include "pan_bo.h"
36 #include "genxml/gen_macros.h"
37 #include "pan_device.h"
38 
39 /* Tiler structure size computation */
40 
41 unsigned
42 panfrost_tiler_header_size(unsigned width, unsigned height, unsigned mask, bool hierarchy);
43 
44 unsigned
45 panfrost_tiler_full_size(unsigned width, unsigned height, unsigned mask, bool hierarchy);
46 
47 unsigned
48 panfrost_choose_hierarchy_mask(
49         unsigned width, unsigned height,
50         unsigned vertex_count, bool hierarchy);
51 
52 #if defined(PAN_ARCH) && PAN_ARCH <= 5
53 static inline unsigned
panfrost_tiler_get_polygon_list_size(const struct panfrost_device * dev,unsigned fb_width,unsigned fb_height,bool has_draws)54 panfrost_tiler_get_polygon_list_size(const struct panfrost_device *dev,
55                                      unsigned fb_width, unsigned fb_height,
56                                      bool has_draws)
57 {
58         if (!has_draws)
59                 return MALI_MIDGARD_TILER_MINIMUM_HEADER_SIZE + 4;
60 
61         bool hierarchy = !(dev->quirks & MIDGARD_NO_HIER_TILING);
62         unsigned hierarchy_mask =
63                 panfrost_choose_hierarchy_mask(fb_width, fb_height, 1, hierarchy);
64 
65         return panfrost_tiler_full_size(fb_width, fb_height, hierarchy_mask, hierarchy) +
66                 panfrost_tiler_header_size(fb_width, fb_height, hierarchy_mask, hierarchy);
67 }
68 #endif
69 
70 /* Stack sizes */
71 
72 unsigned
73 panfrost_get_stack_shift(unsigned stack_size);
74 
75 unsigned
76 panfrost_get_total_stack_size(
77                 unsigned thread_size,
78                 unsigned threads_per_core,
79                 unsigned core_count);
80 
81 const char * panfrost_model_name(unsigned gpu_id);
82 
83 /* Attributes / instancing */
84 
85 unsigned
86 panfrost_padded_vertex_count(unsigned vertex_count);
87 
88 unsigned
89 panfrost_compute_magic_divisor(unsigned hw_divisor, unsigned *o_shift, unsigned *extra_flags);
90 
91 #ifdef PAN_ARCH
92 /* Records for gl_VertexID and gl_InstanceID use special encodings on Midgard */
93 
94 #if PAN_ARCH <= 5
95 static inline void
panfrost_vertex_id(unsigned padded_count,struct mali_attribute_buffer_packed * attr,bool instanced)96 panfrost_vertex_id(unsigned padded_count,
97                    struct mali_attribute_buffer_packed *attr,
98                    bool instanced)
99 {
100         pan_pack(attr, ATTRIBUTE_VERTEX_ID, cfg) {
101                 if (instanced) {
102                         cfg.divisor_r = __builtin_ctz(padded_count);
103                         cfg.divisor_p = padded_count >> (cfg.divisor_r + 1);
104                 } else {
105                         /* Large values so the modulo is a no-op */
106                         cfg.divisor_r = 0x1F;
107                         cfg.divisor_p = 0x4;
108                 }
109         }
110 }
111 
112 static inline void
panfrost_instance_id(unsigned padded_count,struct mali_attribute_buffer_packed * attr,bool instanced)113 panfrost_instance_id(unsigned padded_count,
114                      struct mali_attribute_buffer_packed *attr,
115                      bool instanced)
116 {
117         pan_pack(attr, ATTRIBUTE_INSTANCE_ID, cfg) {
118                 if (!instanced || padded_count <= 1) {
119                         /* Divide by large number to force to 0 */
120                         cfg.divisor_p = ((1u << 31) - 1);
121                         cfg.divisor_r = 0x1F;
122                         cfg.divisor_e = 0x1;
123                 } else if(util_is_power_of_two_or_zero(padded_count)) {
124                         /* Can't underflow since padded_count >= 2 */
125                         cfg.divisor_r = __builtin_ctz(padded_count) - 1;
126                 } else {
127                         cfg.divisor_p =
128                                 panfrost_compute_magic_divisor(padded_count,
129                                         &cfg.divisor_r, &cfg.divisor_e);
130                 }
131         }
132 }
133 #endif /* PAN_ARCH <= 5 */
134 
135 /* Sampler comparison functions are flipped in OpenGL from the hardware, so we
136  * need to be able to flip accordingly */
137 
138 static inline enum mali_func
panfrost_flip_compare_func(enum mali_func f)139 panfrost_flip_compare_func(enum mali_func f)
140 {
141         switch (f) {
142         case MALI_FUNC_LESS: return MALI_FUNC_GREATER;
143         case MALI_FUNC_GREATER: return MALI_FUNC_LESS;
144         case MALI_FUNC_LEQUAL: return MALI_FUNC_GEQUAL;
145         case MALI_FUNC_GEQUAL: return MALI_FUNC_LEQUAL;
146         default: return f;
147         }
148 
149 }
150 
151 /* Compute shaders are invoked with a gl_NumWorkGroups X/Y/Z triplet. Vertex
152  * shaders are invoked as (1, vertex_count, instance_count). Compute shaders
153  * also have a gl_WorkGroupSize X/Y/Z triplet. These 6 values are packed
154  * together in a dynamic bitfield, packed by this routine. */
155 
156 static inline void
panfrost_pack_work_groups_compute(struct mali_invocation_packed * out,unsigned num_x,unsigned num_y,unsigned num_z,unsigned size_x,unsigned size_y,unsigned size_z,bool quirk_graphics,bool indirect_dispatch)157 panfrost_pack_work_groups_compute(
158         struct mali_invocation_packed *out,
159         unsigned num_x, unsigned num_y, unsigned num_z,
160         unsigned size_x, unsigned size_y, unsigned size_z,
161         bool quirk_graphics, bool indirect_dispatch)
162 {
163         /* The values needing packing, in order, and the corresponding shifts.
164          * Indicies into shift are off-by-one to make the logic easier */
165 
166         unsigned values[6] = { size_x, size_y, size_z, num_x, num_y, num_z };
167         unsigned shifts[7] = { 0 };
168         uint32_t packed = 0;
169 
170         for (unsigned i = 0; i < 6; ++i) {
171                 /* Must be positive, otherwise we underflow */
172                 assert(values[i] >= 1);
173 
174                 /* OR it in, shifting as required */
175                 packed |= ((values[i] - 1) << shifts[i]);
176 
177                 /* How many bits did we use? */
178                 unsigned bit_count = util_logbase2_ceil(values[i]);
179 
180                 /* Set the next shift accordingly */
181                 shifts[i + 1] = shifts[i] + bit_count;
182         }
183 
184         pan_pack(out, INVOCATION, cfg) {
185                 cfg.invocations = packed;
186                 cfg.size_y_shift = shifts[1];
187                 cfg.size_z_shift = shifts[2];
188                 cfg.workgroups_x_shift = shifts[3];
189 
190                 if (!indirect_dispatch) {
191                         /* Leave zero for the dispatch shader */
192                         cfg.workgroups_y_shift = shifts[4];
193                         cfg.workgroups_z_shift = shifts[5];
194                 }
195 
196                 /* Quirk: for non-instanced graphics, the blob sets
197                  * workgroups_z_shift = 32. This doesn't appear to matter to
198                  * the hardware, but it's good to be bit-identical. */
199 
200                 if (quirk_graphics && (num_z <= 1))
201                         cfg.workgroups_z_shift = 32;
202 
203                 /* For graphics, set to the minimum efficient value. For
204                  * compute, must equal the workgroup X shift for barriers to
205                  * function correctly */
206 
207                 cfg.thread_group_split = quirk_graphics ?
208                         MALI_SPLIT_MIN_EFFICIENT : cfg.workgroups_x_shift;
209         }
210 }
211 
212 #if PAN_ARCH >= 5
213 /* Format conversion */
214 static inline enum mali_z_internal_format
panfrost_get_z_internal_format(enum pipe_format fmt)215 panfrost_get_z_internal_format(enum pipe_format fmt)
216 {
217          switch (fmt) {
218          case PIPE_FORMAT_Z16_UNORM:
219          case PIPE_FORMAT_Z16_UNORM_S8_UINT:
220                 return MALI_Z_INTERNAL_FORMAT_D16;
221          case PIPE_FORMAT_Z24_UNORM_S8_UINT:
222          case PIPE_FORMAT_Z24X8_UNORM:
223                 return MALI_Z_INTERNAL_FORMAT_D24;
224          case PIPE_FORMAT_Z32_FLOAT:
225          case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
226                 return MALI_Z_INTERNAL_FORMAT_D32;
227          default:
228                 unreachable("Unsupported depth/stencil format.");
229          }
230 }
231 #endif
232 
233 #endif /* PAN_ARCH */
234 
235 #endif
236