2 * © Copyright 2017-2018 Alyssa Rosenzweig
3 * © Copyright 2017-2018 Connor Abbott
4 * © Copyright 2017-2018 Lyude Paul
5 * © Copyright2019 Collabora, Ltd.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice (including the next
15 * paragraph) shall be included in all copies or substantial portions of the
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
28 #ifndef __PANFROST_JOB_H__
29 #define __PANFROST_JOB_H__
33 #include <panfrost-misc.h>
38 JOB_TYPE_WRITE_VALUE
= 2,
39 JOB_TYPE_CACHE_FLUSH
= 3,
42 JOB_TYPE_GEOMETRY
= 6,
45 JOB_TYPE_FRAGMENT
= 9,
52 MALI_LINE_STRIP
= 0x4,
55 MALI_TRIANGLE_STRIP
= 0xA,
56 MALI_TRIANGLE_FAN
= 0xC,
59 MALI_QUAD_STRIP
= 0xF,
61 /* All other modes invalid */
64 /* Applies to tiler_gl_enables */
66 #define MALI_OCCLUSION_QUERY (1 << 3)
67 #define MALI_OCCLUSION_PRECISE (1 << 4)
69 /* Set for a glFrontFace(GL_CCW) in a Y=0=TOP coordinate system (like Gallium).
70 * In OpenGL, this would corresponds to glFrontFace(GL_CW). Mesa and the blob
71 * disagree about how to do viewport flipping, so the blob actually sets this
72 * for GL_CW but then has a negative viewport stride */
74 #define MALI_FRONT_CCW_TOP (1 << 5)
76 #define MALI_CULL_FACE_FRONT (1 << 6)
77 #define MALI_CULL_FACE_BACK (1 << 7)
79 /* Used in stencil and depth tests */
86 MALI_FUNC_GREATER
= 4,
87 MALI_FUNC_NOTEQUAL
= 5,
92 /* Flags apply to unknown2_3? */
94 #define MALI_HAS_MSAA (1 << 0)
95 #define MALI_CAN_DISCARD (1 << 5)
97 /* Applies on SFBD systems, specifying that programmable blending is in use */
98 #define MALI_HAS_BLEND_SHADER (1 << 6)
100 /* func is mali_func */
101 #define MALI_DEPTH_FUNC(func) (func << 8)
102 #define MALI_GET_DEPTH_FUNC(flags) ((flags >> 8) & 0x7)
103 #define MALI_DEPTH_FUNC_MASK MALI_DEPTH_FUNC(0x7)
105 #define MALI_DEPTH_WRITEMASK (1 << 11)
107 #define MALI_DEPTH_CLIP_NEAR (1 << 12)
108 #define MALI_DEPTH_CLIP_FAR (1 << 13)
110 /* Next flags to unknown2_4 */
111 #define MALI_STENCIL_TEST (1 << 0)
113 #define MALI_ALPHA_TO_COVERAGE (1 << 1)
115 #define MALI_NO_DITHER (1 << 9)
116 #define MALI_DEPTH_RANGE_A (1 << 12)
117 #define MALI_DEPTH_RANGE_B (1 << 13)
118 #define MALI_NO_MSAA (1 << 14)
120 /* Stencil test state is all encoded in a single u32, just with a lot of
123 enum mali_stencil_op
{
124 MALI_STENCIL_KEEP
= 0,
125 MALI_STENCIL_REPLACE
= 1,
126 MALI_STENCIL_ZERO
= 2,
127 MALI_STENCIL_INVERT
= 3,
128 MALI_STENCIL_INCR_WRAP
= 4,
129 MALI_STENCIL_DECR_WRAP
= 5,
130 MALI_STENCIL_INCR
= 6,
131 MALI_STENCIL_DECR
= 7
134 struct mali_stencil_test
{
137 enum mali_func func
: 3;
138 enum mali_stencil_op sfail
: 3;
139 enum mali_stencil_op dpfail
: 3;
140 enum mali_stencil_op dppass
: 3;
142 } __attribute__((packed
));
144 #define MALI_MASK_R (1 << 0)
145 #define MALI_MASK_G (1 << 1)
146 #define MALI_MASK_B (1 << 2)
147 #define MALI_MASK_A (1 << 3)
149 enum mali_nondominant_mode
{
150 MALI_BLEND_NON_MIRROR
= 0,
151 MALI_BLEND_NON_ZERO
= 1
154 enum mali_dominant_blend
{
155 MALI_BLEND_DOM_SOURCE
= 0,
156 MALI_BLEND_DOM_DESTINATION
= 1
159 enum mali_dominant_factor
{
160 MALI_DOMINANT_UNK0
= 0,
161 MALI_DOMINANT_ZERO
= 1,
162 MALI_DOMINANT_SRC_COLOR
= 2,
163 MALI_DOMINANT_DST_COLOR
= 3,
164 MALI_DOMINANT_UNK4
= 4,
165 MALI_DOMINANT_SRC_ALPHA
= 5,
166 MALI_DOMINANT_DST_ALPHA
= 6,
167 MALI_DOMINANT_CONSTANT
= 7,
170 enum mali_blend_modifier
{
171 MALI_BLEND_MOD_UNK0
= 0,
172 MALI_BLEND_MOD_NORMAL
= 1,
173 MALI_BLEND_MOD_SOURCE_ONE
= 2,
174 MALI_BLEND_MOD_DEST_ONE
= 3,
177 struct mali_blend_mode
{
178 enum mali_blend_modifier clip_modifier
: 2;
179 unsigned unused_0
: 1;
180 unsigned negate_source
: 1;
182 enum mali_dominant_blend dominant
: 1;
184 enum mali_nondominant_mode nondominant_mode
: 1;
186 unsigned unused_1
: 1;
188 unsigned negate_dest
: 1;
190 enum mali_dominant_factor dominant_factor
: 3;
191 unsigned complement_dominant
: 1;
192 } __attribute__((packed
));
194 struct mali_blend_equation
{
195 /* Of type mali_blend_mode */
196 unsigned rgb_mode
: 12;
197 unsigned alpha_mode
: 12;
201 /* Corresponds to MALI_MASK_* above and glColorMask arguments */
203 unsigned color_mask
: 4;
204 } __attribute__((packed
));
206 /* Used with channel swizzling */
208 MALI_CHANNEL_RED
= 0,
209 MALI_CHANNEL_GREEN
= 1,
210 MALI_CHANNEL_BLUE
= 2,
211 MALI_CHANNEL_ALPHA
= 3,
212 MALI_CHANNEL_ZERO
= 4,
213 MALI_CHANNEL_ONE
= 5,
214 MALI_CHANNEL_RESERVED_0
= 6,
215 MALI_CHANNEL_RESERVED_1
= 7,
218 struct mali_channel_swizzle
{
219 enum mali_channel r
: 3;
220 enum mali_channel g
: 3;
221 enum mali_channel b
: 3;
222 enum mali_channel a
: 3;
223 } __attribute__((packed
));
225 /* Compressed per-pixel formats. Each of these formats expands to one to four
226 * floating-point or integer numbers, as defined by the OpenGL specification.
227 * There are various places in OpenGL where the user can specify a compressed
228 * format in memory, which all use the same 8-bit enum in the various
229 * descriptors, although different hardware units support different formats.
232 /* The top 3 bits specify how the bits of each component are interpreted. */
235 #define MALI_FORMAT_COMPRESSED (0 << 5)
237 /* e.g. R11F_G11F_B10F */
238 #define MALI_FORMAT_SPECIAL (2 << 5)
240 /* signed normalized, e.g. RGBA8_SNORM */
241 #define MALI_FORMAT_SNORM (3 << 5)
244 #define MALI_FORMAT_UINT (4 << 5)
246 /* e.g. RGBA8 and RGBA32F */
247 #define MALI_FORMAT_UNORM (5 << 5)
249 /* e.g. RGBA8I and RGBA16F */
250 #define MALI_FORMAT_SINT (6 << 5)
252 /* These formats seem to largely duplicate the others. They're used at least
253 * for Bifrost framebuffer output.
255 #define MALI_FORMAT_SPECIAL2 (7 << 5)
256 #define MALI_EXTRACT_TYPE(fmt) ((fmt) & 0xe0)
258 /* If the high 3 bits are 3 to 6 these two bits say how many components
261 #define MALI_NR_CHANNELS(n) ((n - 1) << 3)
262 #define MALI_EXTRACT_CHANNELS(fmt) ((((fmt) >> 3) & 3) + 1)
264 /* If the high 3 bits are 3 to 6, then the low 3 bits say how big each
265 * component is, except the special MALI_CHANNEL_FLOAT which overrides what the
269 #define MALI_CHANNEL_4 2
271 #define MALI_CHANNEL_8 3
273 #define MALI_CHANNEL_16 4
275 #define MALI_CHANNEL_32 5
277 /* For MALI_FORMAT_SINT it means a half-float (e.g. RG16F). For
278 * MALI_FORMAT_UNORM, it means a 32-bit float.
280 #define MALI_CHANNEL_FLOAT 7
281 #define MALI_EXTRACT_BITS(fmt) (fmt & 0x7)
284 MALI_ETC2_RGB8
= MALI_FORMAT_COMPRESSED
| 0x1,
285 MALI_ETC2_R11_UNORM
= MALI_FORMAT_COMPRESSED
| 0x2,
286 MALI_ETC2_RGBA8
= MALI_FORMAT_COMPRESSED
| 0x3,
287 MALI_ETC2_RG11_UNORM
= MALI_FORMAT_COMPRESSED
| 0x4,
288 MALI_ETC2_R11_SNORM
= MALI_FORMAT_COMPRESSED
| 0x11,
289 MALI_ETC2_RG11_SNORM
= MALI_FORMAT_COMPRESSED
| 0x12,
290 MALI_ETC2_RGB8A1
= MALI_FORMAT_COMPRESSED
| 0x13,
291 MALI_ASTC_SRGB_SUPP
= MALI_FORMAT_COMPRESSED
| 0x16,
292 MALI_ASTC_HDR_SUPP
= MALI_FORMAT_COMPRESSED
| 0x17,
294 MALI_RGB565
= MALI_FORMAT_SPECIAL
| 0x0,
295 MALI_RGB5_X1_UNORM
= MALI_FORMAT_SPECIAL
| 0x1,
296 MALI_RGB5_A1_UNORM
= MALI_FORMAT_SPECIAL
| 0x2,
297 MALI_RGB10_A2_UNORM
= MALI_FORMAT_SPECIAL
| 0x3,
298 MALI_RGB10_A2_SNORM
= MALI_FORMAT_SPECIAL
| 0x5,
299 MALI_RGB10_A2UI
= MALI_FORMAT_SPECIAL
| 0x7,
300 MALI_RGB10_A2I
= MALI_FORMAT_SPECIAL
| 0x9,
302 MALI_RGB332_UNORM
= MALI_FORMAT_SPECIAL
| 0xb,
303 MALI_RGB233_UNORM
= MALI_FORMAT_SPECIAL
| 0xc,
305 MALI_Z24X8_UNORM
= MALI_FORMAT_SPECIAL
| 0xd,
306 MALI_R32_FIXED
= MALI_FORMAT_SPECIAL
| 0x11,
307 MALI_RG32_FIXED
= MALI_FORMAT_SPECIAL
| 0x12,
308 MALI_RGB32_FIXED
= MALI_FORMAT_SPECIAL
| 0x13,
309 MALI_RGBA32_FIXED
= MALI_FORMAT_SPECIAL
| 0x14,
310 MALI_R11F_G11F_B10F
= MALI_FORMAT_SPECIAL
| 0x19,
311 MALI_R9F_G9F_B9F_E5F
= MALI_FORMAT_SPECIAL
| 0x1b,
312 /* Only used for varyings, to indicate the transformed gl_Position */
313 MALI_VARYING_POS
= MALI_FORMAT_SPECIAL
| 0x1e,
314 /* Only used for varyings, to indicate that the write should be
317 MALI_VARYING_DISCARD
= MALI_FORMAT_SPECIAL
| 0x1f,
319 MALI_R8_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_8
,
320 MALI_R16_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_16
,
321 MALI_R32_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_32
,
322 MALI_RG8_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_8
,
323 MALI_RG16_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_16
,
324 MALI_RG32_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_32
,
325 MALI_RGB8_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_8
,
326 MALI_RGB16_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_16
,
327 MALI_RGB32_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_32
,
328 MALI_RGBA8_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_8
,
329 MALI_RGBA16_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_16
,
330 MALI_RGBA32_SNORM
= MALI_FORMAT_SNORM
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_32
,
332 MALI_R8UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_8
,
333 MALI_R16UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_16
,
334 MALI_R32UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_32
,
335 MALI_RG8UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_8
,
336 MALI_RG16UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_16
,
337 MALI_RG32UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_32
,
338 MALI_RGB8UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_8
,
339 MALI_RGB16UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_16
,
340 MALI_RGB32UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_32
,
341 MALI_RGBA8UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_8
,
342 MALI_RGBA16UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_16
,
343 MALI_RGBA32UI
= MALI_FORMAT_UINT
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_32
,
345 MALI_R8_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_8
,
346 MALI_R16_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_16
,
347 MALI_R32_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_32
,
348 MALI_R32F
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_FLOAT
,
349 MALI_RG8_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_8
,
350 MALI_RG16_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_16
,
351 MALI_RG32_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_32
,
352 MALI_RG32F
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_FLOAT
,
353 MALI_RGB8_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_8
,
354 MALI_RGB16_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_16
,
355 MALI_RGB32_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_32
,
356 MALI_RGB32F
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_FLOAT
,
357 MALI_RGBA4_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_4
,
358 MALI_RGBA8_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_8
,
359 MALI_RGBA16_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_16
,
360 MALI_RGBA32_UNORM
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_32
,
361 MALI_RGBA32F
= MALI_FORMAT_UNORM
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_FLOAT
,
363 MALI_R8I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_8
,
364 MALI_R16I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_16
,
365 MALI_R32I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_32
,
366 MALI_R16F
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(1) | MALI_CHANNEL_FLOAT
,
367 MALI_RG8I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_8
,
368 MALI_RG16I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_16
,
369 MALI_RG32I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_32
,
370 MALI_RG16F
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(2) | MALI_CHANNEL_FLOAT
,
371 MALI_RGB8I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_8
,
372 MALI_RGB16I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_16
,
373 MALI_RGB32I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_32
,
374 MALI_RGB16F
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(3) | MALI_CHANNEL_FLOAT
,
375 MALI_RGBA8I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_8
,
376 MALI_RGBA16I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_16
,
377 MALI_RGBA32I
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_32
,
378 MALI_RGBA16F
= MALI_FORMAT_SINT
| MALI_NR_CHANNELS(4) | MALI_CHANNEL_FLOAT
,
380 MALI_RGBA4
= MALI_FORMAT_SPECIAL2
| 0x8,
381 MALI_RGBA8_2
= MALI_FORMAT_SPECIAL2
| 0xd,
382 MALI_RGB10_A2_2
= MALI_FORMAT_SPECIAL2
| 0xe,
386 /* Applies to midgard1.flags_lo */
388 /* Should be set when the fragment shader updates the depth value. */
389 #define MALI_WRITES_Z (1 << 4)
391 /* Should the hardware perform early-Z testing? Set if the shader does not use
392 * discard, alpha-to-coverage, shader depth writes, and if the shader has no
393 * side effects (writes to global memory or images) unless early-z testing is
394 * forced in the shader.
397 #define MALI_EARLY_Z (1 << 6)
399 /* Should the hardware calculate derivatives (via helper invocations)? Set in a
400 * fragment shader that uses texturing or derivative functions */
402 #define MALI_HELPER_INVOCATIONS (1 << 7)
404 /* Flags denoting the fragment shader's use of tilebuffer readback. If the
405 * shader might read any part of the tilebuffer, set MALI_READS_TILEBUFFER. If
406 * it might read depth/stencil in particular, also set MALI_READS_ZS */
408 #define MALI_READS_ZS (1 << 8)
410 /* The shader might write to global memory (via OpenCL, SSBOs, or images).
411 * Reading is okay, as are ordinary writes to the tilebuffer/varyings. Setting
412 * incurs a performance penalty. On a fragment shader, this bit implies there
413 * are side effects, hence it interacts with early-z. */
414 #define MALI_WRITES_GLOBAL (1 << 9)
416 #define MALI_READS_TILEBUFFER (1 << 10)
418 /* Applies to midgard1.flags_hi */
420 /* Should be set when the fragment shader updates the stencil value. */
421 #define MALI_WRITES_S (1 << 2)
423 /* Mode to suppress generation of Infinity and NaN values by clamping inf
424 * (-inf) to MAX_FLOAT (-MIN_FLOAT) and flushing NaN to 0.0
426 * Compare suppress_inf/suppress_nan flags on the Bifrost clause header for the
427 * same functionality.
429 * This is not conformant on GLES3 or OpenCL, but is optional on GLES2, where
430 * it works around app bugs (e.g. in glmark2-es2 -bterrain with FP16).
432 #define MALI_SUPPRESS_INF_NAN (1 << 3)
434 /* Flags for bifrost1.unk1 */
436 /* Shader uses less than 32 registers, partitioned as [R0, R15] U [R48, R63],
437 * allowing for full thread count. If clear, the full [R0, R63] register set is
438 * available at half thread count */
439 #define MALI_BIFROST_FULL_THREAD (1 << 9)
441 /* Enable early-z testing (presumably). This flag may not be set if the shader:
445 * - Writes gl_FragDepth
447 * This differs from Midgard which sets the MALI_EARLY_Z flag even with
448 * blending, although I've begun to suspect that flag does not in fact enable
450 #define MALI_BIFROST_EARLY_Z (1 << 15)
452 /* First clause type is ATEST */
453 #define MALI_BIFROST_FIRST_ATEST (1 << 26)
455 /* The raw Midgard blend payload can either be an equation or a shader
456 * address, depending on the context */
458 union midgard_blend
{
462 struct mali_blend_equation equation
;
467 /* We need to load the tilebuffer to blend (i.e. the destination factor is not
470 #define MALI_BLEND_LOAD_TIB (0x1)
472 /* A blend shader is used to blend this render target */
473 #define MALI_BLEND_MRT_SHADER (0x2)
475 /* On MRT Midgard systems (using an MFBD), each render target gets its own
476 * blend descriptor */
478 #define MALI_BLEND_SRGB (0x400)
480 /* Dithering is specified here for MFBD, otherwise NO_DITHER for SFBD */
481 #define MALI_BLEND_NO_DITHER (0x800)
483 struct midgard_blend_rt
{
484 /* Flags base value of 0x200 to enable the render target.
485 * OR with 0x1 for blending (anything other than REPLACE).
486 * OR with 0x2 for programmable blending
487 * OR with MALI_BLEND_SRGB for implicit sRGB
491 union midgard_blend blend
;
492 } __attribute__((packed
));
494 /* On Bifrost systems (all MRT), each render target gets one of these
497 enum bifrost_shader_type
{
498 BIFROST_BLEND_F16
= 0,
499 BIFROST_BLEND_F32
= 1,
500 BIFROST_BLEND_I32
= 2,
501 BIFROST_BLEND_U32
= 3,
502 BIFROST_BLEND_I16
= 4,
503 BIFROST_BLEND_U16
= 5,
506 #define BIFROST_MAX_RENDER_TARGET_COUNT 8
508 struct bifrost_blend_rt
{
509 /* This is likely an analogue of the flags on
510 * midgard_blend_rt */
512 u16 flags
; // = 0x200
514 /* Single-channel blend constants are encoded in a sort of
515 * fixed-point. Basically, the float is mapped to a byte, becoming
516 * a high byte, and then the lower-byte is added for precision.
517 * For the original float f:
519 * f = (constant_hi / 255) + (constant_lo / 65535)
521 * constant_hi = int(f / 255)
522 * constant_lo = 65535*f - (65535/255) * constant_hi
526 struct mali_blend_equation equation
;
530 * - 0x3 when this slot is unused (everything else is 0 except the index)
531 * - 0x11 when this is the fourth slot (and it's used)
532 * - 0 when there is a blend shader
536 /* increments from 0 to 3 */
541 /* So far, I've only seen:
542 * - R001 for 1-component formats
543 * - RG01 for 2-component formats
544 * - RGB1 for 3-component formats
545 * - RGBA for 4-component formats
548 enum mali_format format
: 8;
550 /* Type of the shader output variable. Note, this can
551 * be different from the format.
552 * enum bifrost_shader_type
559 /* Only the low 32 bits of the blend shader are stored, the
560 * high 32 bits are implicitly the same as the original shader.
561 * According to the kernel driver, the program counter for
562 * shaders is actually only 24 bits, so shaders cannot cross
563 * the 2^24-byte boundary, and neither can the blend shader.
564 * The blob handles this by allocating a 2^24 byte pool for
565 * shaders, and making sure that any blend shaders are stored
566 * in the same pool as the original shader. The kernel will
567 * make sure this allocation is aligned to 2^24 bytes.
571 } __attribute__((packed
));
573 /* Descriptor for the shader. Following this is at least one, up to four blend
574 * descriptors for each active render target */
576 struct mali_shader_meta
{
585 u32 uniform_buffer_count
: 4;
586 u32 unk1
: 28; // = 0x800000 for vertex, 0x958020 for tiler
589 unsigned uniform_buffer_count
: 4;
590 unsigned flags_lo
: 12;
593 unsigned work_count
: 5;
594 unsigned uniform_count
: 5;
595 unsigned flags_hi
: 6;
599 /* Same as glPolygoOffset() arguments */
605 /* Generated from SAMPLE_COVERAGE_VALUE and SAMPLE_COVERAGE_INVERT. See
606 * 13.8.3 ("Multisample Fragment Operations") in the OpenGL ES 3.2
607 * specification. Only matters when multisampling is enabled. */
612 u8 stencil_mask_front
;
613 u8 stencil_mask_back
;
616 struct mali_stencil_test stencil_front
;
617 struct mali_stencil_test stencil_back
;
622 /* On Bifrost, some system values are preloaded in
623 * registers R55-R62 by the thread dispatcher prior to
624 * the start of shader execution. This is a bitfield
625 * with one entry for each register saying which
626 * registers need to be preloaded. Right now, the known
630 * - R55 : gl_LocalInvocationID.xy
631 * - R56 : gl_LocalInvocationID.z + unknown in high 16 bits
632 * - R57 : gl_WorkGroupID.x
633 * - R58 : gl_WorkGroupID.y
634 * - R59 : gl_WorkGroupID.z
635 * - R60 : gl_GlobalInvocationID.x
636 * - R61 : gl_GlobalInvocationID.y/gl_VertexID (without base)
637 * - R62 : gl_GlobalInvocationID.z/gl_InstanceID (without base)
640 * - R55 : unknown, never seen (but the bit for this is
642 * - R56 : unknown (bit always unset)
643 * - R57 : gl_PrimitiveID
644 * - R58 : gl_FrontFacing in low bit, potentially other stuff
645 * - R59 : u16 fragment coordinates (used to compute
646 * gl_FragCoord.xy, together with sample positions)
647 * - R60 : gl_SampleMask (used in epilog, so pretty
648 * much always used, but the bit is always 0 -- is
649 * this just always pushed?)
650 * - R61 : gl_SampleMaskIn and gl_SampleID, used by
651 * varying interpolation.
652 * - R62 : unknown (bit always unset).
654 * Later GPUs (starting with Mali-G52?) support
655 * preloading float varyings into r0-r7. This is
656 * indicated by setting 0x40. There is no distinction
657 * here between 1 varying and 2.
659 u32 preload_regs
: 8;
660 /* In units of 8 bytes or 64 bits, since the
661 * uniform/const port loads 64 bits at a time.
663 u32 uniform_count
: 7;
664 u32 unk4
: 10; // = 2
673 /* Blending information for the older non-MRT Midgard HW. Check for
674 * MALI_HAS_BLEND_SHADER to decide how to interpret.
677 union midgard_blend blend
;
678 } __attribute__((packed
));
680 /* This only concerns hardware jobs */
682 /* Possible values for job_descriptor_size */
684 #define MALI_JOB_32 0
685 #define MALI_JOB_64 1
687 struct mali_job_descriptor_header
{
688 u32 exception_status
;
689 u32 first_incomplete_task
;
691 u8 job_descriptor_size
: 1;
692 enum mali_job_type job_type
: 7;
694 u8 unknown_flags
: 7;
696 u16 job_dependency_index_1
;
697 u16 job_dependency_index_2
;
699 } __attribute__((packed
));
701 /* These concern exception_status */
703 /* Access type causing a fault, paralleling AS_FAULTSTATUS_* entries in the
706 enum mali_exception_access
{
707 /* Atomic in the kernel for MMU, but that doesn't make sense for a job
708 * fault so it's just unused */
709 MALI_EXCEPTION_ACCESS_NONE
= 0,
711 MALI_EXCEPTION_ACCESS_EXECUTE
= 1,
712 MALI_EXCEPTION_ACCESS_READ
= 2,
713 MALI_EXCEPTION_ACCESS_WRITE
= 3
716 /* Details about write_value from panfrost igt tests which use it as a generic
717 * dword write primitive */
719 #define MALI_WRITE_VALUE_ZERO 3
721 struct mali_payload_write_value
{
723 u32 value_descriptor
;
726 } __attribute__((packed
));
731 * This structure lets the attribute unit compute the address of an attribute
732 * given the vertex and instance ID. Unfortunately, the way this works is
733 * rather complicated when instancing is enabled.
735 * To explain this, first we need to explain how compute and vertex threads are
736 * dispatched. This is a guess (although a pretty firm guess!) since the
737 * details are mostly hidden from the driver, except for attribute instancing.
738 * When a quad is dispatched, it receives a single, linear index. However, we
739 * need to translate that index into a (vertex id, instance id) pair, or a
740 * (local id x, local id y, local id z) triple for compute shaders (although
741 * vertex shaders and compute shaders are handled almost identically).
742 * Focusing on vertex shaders, one option would be to do:
744 * vertex_id = linear_id % num_vertices
745 * instance_id = linear_id / num_vertices
747 * but this involves a costly division and modulus by an arbitrary number.
748 * Instead, we could pad num_vertices. We dispatch padded_num_vertices *
749 * num_instances threads instead of num_vertices * num_instances, which results
750 * in some "extra" threads with vertex_id >= num_vertices, which we have to
751 * discard. The more we pad num_vertices, the more "wasted" threads we
752 * dispatch, but the division is potentially easier.
754 * One straightforward choice is to pad num_vertices to the next power of two,
755 * which means that the division and modulus are just simple bit shifts and
756 * masking. But the actual algorithm is a bit more complicated. The thread
757 * dispatcher has special support for dividing by 3, 5, 7, and 9, in addition
758 * to dividing by a power of two. This is possibly using the technique
759 * described in patent US20170010862A1. As a result, padded_num_vertices can be
760 * 1, 3, 5, 7, or 9 times a power of two. This results in less wasted threads,
761 * since we need less padding.
763 * padded_num_vertices is picked by the hardware. The driver just specifies the
764 * actual number of vertices. At least for Mali G71, the first few cases are
767 * num_vertices | padded_num_vertices
774 * Note that padded_num_vertices is a multiple of four (presumably because
775 * threads are dispatched in groups of 4). Also, padded_num_vertices is always
776 * at least one more than num_vertices, which seems like a quirk of the
777 * hardware. For larger num_vertices, the hardware uses the following
778 * algorithm: using the binary representation of num_vertices, we look at the
779 * most significant set bit as well as the following 3 bits. Let n be the
780 * number of bits after those 4 bits. Then we set padded_num_vertices according
781 * to the following table:
783 * high bits | padded_num_vertices
790 * For example, if num_vertices = 70 is passed to glDraw(), its binary
791 * representation is 1000110, so n = 3 and the high bits are 1000, and
792 * therefore padded_num_vertices = 9 * 2^3 = 72.
794 * The attribute unit works in terms of the original linear_id. if
795 * num_instances = 1, then they are the same, and everything is simple.
796 * However, with instancing things get more complicated. There are four
797 * possible modes, two of them we can group together:
799 * 1. Use the linear_id directly. Only used when there is no instancing.
801 * 2. Use the linear_id modulo a constant. This is used for per-vertex
802 * attributes with instancing enabled by making the constant equal
803 * padded_num_vertices. Because the modulus is always padded_num_vertices, this
804 * mode only supports a modulus that is a power of 2 times 1, 3, 5, 7, or 9.
805 * The shift field specifies the power of two, while the extra_flags field
806 * specifies the odd number. If shift = n and extra_flags = m, then the modulus
807 * is (2m + 1) * 2^n. As an example, if num_vertices = 70, then as computed
808 * above, padded_num_vertices = 9 * 2^3, so we should set extra_flags = 4 and
809 * shift = 3. Note that we must exactly follow the hardware algorithm used to
810 * get padded_num_vertices in order to correctly implement per-vertex
813 * 3. Divide the linear_id by a constant. In order to correctly implement
814 * instance divisors, we have to divide linear_id by padded_num_vertices times
815 * to user-specified divisor. So first we compute padded_num_vertices, again
816 * following the exact same algorithm that the hardware uses, then multiply it
817 * by the GL-level divisor to get the hardware-level divisor. This case is
818 * further divided into two more cases. If the hardware-level divisor is a
819 * power of two, then we just need to shift. The shift amount is specified by
820 * the shift field, so that the hardware-level divisor is just 2^shift.
822 * If it isn't a power of two, then we have to divide by an arbitrary integer.
823 * For that, we use the well-known technique of multiplying by an approximation
824 * of the inverse. The driver must compute the magic multiplier and shift
825 * amount, and then the hardware does the multiplication and shift. The
826 * hardware and driver also use the "round-down" optimization as described in
827 * http://ridiculousfish.com/files/faster_unsigned_division_by_constants.pdf.
828 * The hardware further assumes the multiplier is between 2^31 and 2^32, so the
829 * high bit is implicitly set to 1 even though it is set to 0 by the driver --
830 * presumably this simplifies the hardware multiplier a little. The hardware
831 * first multiplies linear_id by the multiplier and takes the high 32 bits,
832 * then applies the round-down correction if extra_flags = 1, then finally
833 * shifts right by the shift field.
835 * There are some differences between ridiculousfish's algorithm and the Mali
836 * hardware algorithm, which means that the reference code from ridiculousfish
837 * doesn't always produce the right constants. Mali does not use the pre-shift
838 * optimization, since that would make a hardware implementation slower (it
839 * would have to always do the pre-shift, multiply, and post-shift operations).
840 * It also forces the multplier to be at least 2^31, which means that the
841 * exponent is entirely fixed, so there is no trial-and-error. Altogether,
842 * given the divisor d, the algorithm the driver must follow is:
844 * 1. Set shift = floor(log2(d)).
845 * 2. Compute m = ceil(2^(shift + 32) / d) and e = 2^(shift + 32) % d.
846 * 3. If e <= 2^shift, then we need to use the round-down algorithm. Set
847 * magic_divisor = m - 1 and extra_flags = 1.
848 * 4. Otherwise, set magic_divisor = m and extra_flags = 0.
850 * Unrelated to instancing/actual attributes, images (the OpenCL kind) are
851 * implemented as special attributes, denoted by MALI_ATTR_IMAGE. For images,
852 * let shift=extra_flags=0. Stride is set to the image format's bytes-per-pixel
853 * (*NOT the row stride*). Size is set to the size of the image itself.
855 * Special internal attribtues and varyings (gl_VertexID, gl_FrontFacing, etc)
856 * use particular fixed addresses with modified structures.
859 enum mali_attr_mode
{
860 MALI_ATTR_UNUSED
= 0,
861 MALI_ATTR_LINEAR
= 1,
862 MALI_ATTR_POT_DIVIDE
= 2,
863 MALI_ATTR_MODULO
= 3,
864 MALI_ATTR_NPOT_DIVIDE
= 4,
868 /* Pseudo-address for gl_VertexID, gl_FragCoord, gl_FrontFacing */
870 #define MALI_ATTR_VERTEXID (0x22)
871 #define MALI_ATTR_INSTANCEID (0x24)
872 #define MALI_VARYING_FRAG_COORD (0x25)
873 #define MALI_VARYING_FRONT_FACING (0x26)
875 /* This magic "pseudo-address" is used as `elements` to implement
876 * gl_PointCoord. When read from a fragment shader, it generates a point
877 * coordinate per the OpenGL ES 2.0 specification. Flipped coordinate spaces
878 * require an affine transformation in the shader. */
880 #define MALI_VARYING_POINT_COORD (0x61)
882 /* Used for comparison to check if an address is special. Mostly a guess, but
883 * it doesn't really matter. */
885 #define MALI_RECORD_SPECIAL (0x100)
888 /* This is used for actual attributes. */
890 /* The bottom 3 bits are the mode */
891 mali_ptr elements
: 64 - 8;
897 /* The entry after an NPOT_DIVIDE entry has this format. It stores
898 * extra information that wouldn't fit in a normal entry.
901 u32 unk
; /* = 0x20 */
904 /* This is the original, GL-level divisor. */
907 } __attribute__((packed
));
909 struct mali_attr_meta
{
910 /* Vertex buffer index */
913 unsigned unknown1
: 2;
914 unsigned swizzle
: 12;
915 enum mali_format format
: 8;
917 /* Always observed to be zero at the moment */
918 unsigned unknown3
: 2;
920 /* When packing multiple attributes in a buffer, offset addresses by
921 * this value. Obscurely, this is signed. */
923 } __attribute__((packed
));
925 #define FBD_MASK (~0x3f)
927 /* MFBD, rather than SFBD */
928 #define MALI_MFBD (0x1)
930 /* ORed into an MFBD address to specify the fbx section is included */
931 #define MALI_MFBD_TAG_EXTRA (0x2)
933 /* Uniform buffer objects are 64-bit fields divided as:
936 * mali_ptr ptr : 64 - 10;
938 * The size is actually the size minus 1 (MALI_POSITIVE), in units of 16 bytes.
939 * This gives a maximum of 2^14 bytes, which just so happens to be the GL
940 * minimum-maximum for GL_MAX_UNIFORM_BLOCK_SIZE.
942 * The pointer is missing the bottom 2 bits and top 8 bits. The top 8 bits
943 * should be 0 for userspace pointers, according to
944 * https://lwn.net/Articles/718895/. By reusing these bits, we can make each
945 * entry in the table only 64 bits.
948 #define MALI_MAKE_UBO(elements, ptr) \
949 (MALI_POSITIVE((elements)) | (((ptr) >> 2) << 10))
951 /* On Bifrost, these fields are the same between the vertex and tiler payloads.
952 * They also seem to be the same between Bifrost and Midgard. They're shared in
956 /* Applies to unknown_draw */
958 #define MALI_DRAW_INDEXED_UINT8 (0x10)
959 #define MALI_DRAW_INDEXED_UINT16 (0x20)
960 #define MALI_DRAW_INDEXED_UINT32 (0x30)
961 #define MALI_DRAW_INDEXED_SIZE (0x30)
962 #define MALI_DRAW_INDEXED_SHIFT (4)
964 #define MALI_DRAW_VARYING_SIZE (0x100)
966 /* Set to use first vertex as the provoking vertex for flatshading. Clear to
967 * use the last vertex. This is the default in DX and VK, but not in GL. */
969 #define MALI_DRAW_FLATSHADE_FIRST (0x800)
971 #define MALI_DRAW_PRIMITIVE_RESTART_FIXED_INDEX (0x10000)
973 struct mali_vertex_tiler_prefix
{
974 /* This is a dynamic bitfield containing the following things in this order:
976 * - gl_WorkGroupSize.x
977 * - gl_WorkGroupSize.y
978 * - gl_WorkGroupSize.z
979 * - gl_NumWorkGroups.x
980 * - gl_NumWorkGroups.y
981 * - gl_NumWorkGroups.z
983 * The number of bits allocated for each number is based on the *_shift
984 * fields below. For example, workgroups_y_shift gives the bit that
985 * gl_NumWorkGroups.y starts at, and workgroups_z_shift gives the bit
986 * that gl_NumWorkGroups.z starts at (and therefore one after the bit
987 * that gl_NumWorkGroups.y ends at). The actual value for each gl_*
988 * value is one more than the stored value, since if any of the values
989 * are zero, then there would be no invocations (and hence no job). If
990 * there were 0 bits allocated to a given field, then it must be zero,
991 * and hence the real value is one.
993 * Vertex jobs reuse the same job dispatch mechanism as compute jobs,
994 * effectively doing glDispatchCompute(1, vertex_count, instance_count)
995 * where vertex count is the number of vertices.
997 u32 invocation_count
;
999 /* Bitfield for shifts:
1003 * workgroups_x_shift : 6
1004 * workgroups_y_shift : 6
1005 * workgroups_z_shift : 6
1006 * workgroups_x_shift_2 : 4
1008 u32 invocation_shifts
;
1011 u32 unknown_draw
: 22;
1013 /* This is the the same as workgroups_x_shift_2 in compute shaders, but
1014 * always 5 for vertex jobs and 6 for tiler jobs. I suspect this has
1015 * something to do with how many quads get put in the same execution
1016 * engine, which is a balance (you don't want to starve the engine, but
1017 * you also want to distribute work evenly).
1019 u32 workgroups_x_shift_3
: 6;
1022 /* Negative of min_index. This is used to compute
1023 * the unbiased index in tiler/fragment shader runs.
1025 * The hardware adds offset_bias_correction in each run,
1026 * so that absent an index bias, the first vertex processed is
1027 * genuinely the first vertex (0). But with an index bias,
1028 * the first vertex process is numbered the same as the bias.
1030 * To represent this more conviniently:
1031 * unbiased_index = lower_bound_index +
1033 * offset_bias_correction
1035 * This is done since the hardware doesn't accept a index_bias
1036 * and this allows it to recover the unbiased index.
1038 int32_t offset_bias_correction
;
1041 /* Like many other strictly nonzero quantities, index_count is
1042 * subtracted by one. For an indexed cube, this is equal to 35 = 6
1043 * faces * 2 triangles/per face * 3 vertices/per triangle - 1. That is,
1044 * for an indexed draw, index_count is the number of actual vertices
1045 * rendered whereas invocation_count is the number of unique vertices
1046 * rendered (the number of times the vertex shader must be invoked).
1047 * For non-indexed draws, this is just equal to invocation_count. */
1051 /* No hidden structure; literally just a pointer to an array of uint
1052 * indices (width depends on flags). Thanks, guys, for not making my
1053 * life insane for once! NULL for non-indexed draws. */
1056 } __attribute__((packed
));
1058 /* Point size / line width can either be specified as a 32-bit float (for
1059 * constant size) or as a [machine word size]-bit GPU pointer (for varying size). If a pointer
1060 * is selected, by setting the appropriate MALI_DRAW_VARYING_SIZE bit in the tiler
1061 * payload, the contents of varying_pointer will be intepreted as an array of
1062 * fp16 sizes, one for each vertex. gl_PointSize is therefore implemented by
1063 * creating a special MALI_R16F varying writing to varying_pointer. */
1065 union midgard_primitive_size
{
1070 struct bifrost_tiler_heap_meta
{
1073 /* note: these are just guesses! */
1074 mali_ptr tiler_heap_start
;
1075 mali_ptr tiler_heap_free
;
1076 mali_ptr tiler_heap_end
;
1078 /* hierarchy weights? but they're still 0 after the job has run... */
1082 } __attribute__((packed
));
1084 struct bifrost_tiler_meta
{
1085 u32 tiler_heap_next_start
; /* To be written by the GPU */
1086 u32 used_hierarchy_mask
; /* To be written by the GPU */
1087 u16 hierarchy_mask
; /* Five values observed: 0xa, 0x14, 0x28, 0x50, 0xa0 */
1092 mali_ptr tiler_heap_meta
;
1093 /* TODO what is this used for? */
1095 } __attribute__((packed
));
1097 struct bifrost_tiler_only
{
1099 union midgard_primitive_size primitive_size
;
1101 mali_ptr tiler_meta
;
1103 u64 zero1
, zero2
, zero3
, zero4
, zero5
, zero6
;
1104 } __attribute__((packed
));
1106 struct mali_vertex_tiler_postfix
{
1107 u16 gl_enables
; // 0x6 on Midgard, 0x2 on Bifrost
1109 /* Both zero for non-instanced draws. For instanced draws, a
1110 * decomposition of padded_num_vertices. See the comments about the
1111 * corresponding fields in mali_attr for context. */
1113 unsigned instance_shift
: 5;
1114 unsigned instance_odd
: 3;
1118 /* Offset for first vertex in buffer */
1123 /* Zero for vertex jobs. Pointer to the position (gl_Position) varying
1124 * output from the vertex shader for tiler jobs.
1127 u64 position_varying
;
1129 /* An array of mali_uniform_buffer_meta's. The size is given by the
1132 u64 uniform_buffers
;
1134 /* On Bifrost, this is a pointer to an array of bifrost_texture_descriptor.
1135 * On Midgard, this is a pointer to an array of pointers to the texture
1136 * descriptors, number of pointers bounded by number of textures. The
1137 * indirection is needed to accomodate varying numbers and sizes of
1138 * texture descriptors */
1141 /* For OpenGL, from what I've seen, this is intimately connected to
1142 * texture_meta. cwabbott says this is not the case under Vulkan, hence
1143 * why this field is seperate (Midgard is Vulkan capable). Pointer to
1144 * array of sampler descriptors (which are uniform in size) */
1145 u64 sampler_descriptor
;
1149 u64 attributes
; /* struct attribute_buffer[] */
1150 u64 attribute_meta
; /* attribute_meta[] */
1151 u64 varyings
; /* struct attr */
1152 u64 varying_meta
; /* pointer */
1154 u64 occlusion_counter
; /* A single bit as far as I can tell */
1156 /* On Bifrost, this points directly to a mali_shared_memory structure.
1157 * On Midgard, this points to a framebuffer (either SFBD or MFBD as
1158 * tagged), which embeds a mali_shared_memory structure */
1159 mali_ptr shared_memory
;
1160 } __attribute__((packed
));
1162 struct midgard_payload_vertex_tiler
{
1163 struct mali_vertex_tiler_prefix prefix
;
1164 struct mali_vertex_tiler_postfix postfix
;
1166 union midgard_primitive_size primitive_size
;
1167 } __attribute__((packed
));
1169 struct bifrost_payload_vertex
{
1170 struct mali_vertex_tiler_prefix prefix
;
1171 struct mali_vertex_tiler_postfix postfix
;
1172 } __attribute__((packed
));
1174 struct bifrost_payload_tiler
{
1175 struct mali_vertex_tiler_prefix prefix
;
1176 struct bifrost_tiler_only tiler
;
1177 struct mali_vertex_tiler_postfix postfix
;
1178 } __attribute__((packed
));
1180 struct bifrost_payload_fused
{
1181 struct mali_vertex_tiler_prefix prefix
;
1182 struct bifrost_tiler_only tiler
;
1183 struct mali_vertex_tiler_postfix tiler_postfix
;
1184 u64 padding
; /* zero */
1185 struct mali_vertex_tiler_postfix vertex_postfix
;
1186 } __attribute__((packed
));
1188 /* Purposeful off-by-one in width, height fields. For example, a (64, 64)
1189 * texture is stored as (63, 63) in these fields. This adjusts for that.
1190 * There's an identical pattern in the framebuffer descriptor. Even vertex
1191 * count fields work this way, hence the generic name -- integral fields that
1192 * are strictly positive generally need this adjustment. */
1194 #define MALI_POSITIVE(dim) (dim - 1)
1196 /* Used with wrapping. Unclear what top bit conveys */
1198 enum mali_wrap_mode
{
1199 MALI_WRAP_REPEAT
= 0x8 | 0x0,
1200 MALI_WRAP_CLAMP_TO_EDGE
= 0x8 | 0x1,
1201 MALI_WRAP_CLAMP
= 0x8 | 0x2,
1202 MALI_WRAP_CLAMP_TO_BORDER
= 0x8 | 0x3,
1203 MALI_WRAP_MIRRORED_REPEAT
= 0x8 | 0x4 | 0x0,
1204 MALI_WRAP_MIRRORED_CLAMP_TO_EDGE
= 0x8 | 0x4 | 0x1,
1205 MALI_WRAP_MIRRORED_CLAMP
= 0x8 | 0x4 | 0x2,
1206 MALI_WRAP_MIRRORED_CLAMP_TO_BORDER
= 0x8 | 0x4 | 0x3,
1209 /* Shared across both command stream and Midgard, and even with Bifrost */
1211 enum mali_texture_type
{
1212 MALI_TEX_CUBE
= 0x0,
1219 #define MAX_MIP_LEVELS (13)
1221 /* Cubemap bloats everything up */
1222 #define MAX_CUBE_FACES (6)
1224 /* For each pointer, there is an address and optionally also a stride */
1225 #define MAX_ELEMENTS (2)
1227 /* It's not known why there are 4-bits allocated -- this enum is almost
1228 * certainly incomplete */
1230 enum mali_texture_layout
{
1231 /* For a Z/S texture, this is linear */
1232 MALI_TEXTURE_TILED
= 0x1,
1234 /* Z/S textures cannot be tiled */
1235 MALI_TEXTURE_LINEAR
= 0x2,
1238 MALI_TEXTURE_AFBC
= 0xC
1241 /* Corresponds to the type passed to glTexImage2D and so forth */
1243 struct mali_texture_format
{
1244 unsigned swizzle
: 12;
1245 enum mali_format format
: 8;
1248 unsigned unknown1
: 1;
1250 enum mali_texture_type type
: 2;
1251 enum mali_texture_layout layout
: 4;
1254 unsigned unknown2
: 1;
1256 /* Set to allow packing an explicit stride */
1257 unsigned manual_stride
: 1;
1260 } __attribute__((packed
));
1262 struct mali_texture_descriptor
{
1266 uint16_t array_size
;
1268 struct mali_texture_format format
;
1272 /* One for non-mipmapped, zero for mipmapped */
1275 /* Zero for non-mipmapped, (number of levels - 1) for mipmapped */
1278 /* Swizzling is a single 32-bit word, broken up here for convenience.
1279 * Here, swizzling refers to the ES 3.0 texture parameters for channel
1280 * level swizzling, not the internal pixel-level swizzling which is
1281 * below OpenGL's reach */
1283 unsigned swizzle
: 12;
1284 unsigned swizzle_zero
: 20;
1289 } __attribute__((packed
));
1291 /* While Midgard texture descriptors are variable length, Bifrost descriptors
1292 * are fixed like samplers with more pointers to expand if necessary */
1294 struct bifrost_texture_descriptor
{
1295 unsigned format_unk
: 4; /* 2 */
1296 enum mali_texture_type type
: 2;
1298 unsigned format_swizzle
: 12;
1299 enum mali_format format
: 8;
1301 unsigned format_unk3
: 1; /* 0 */
1303 uint16_t width
; /* MALI_POSITIVE */
1304 uint16_t height
; /* MALI_POSITIVE */
1306 /* OpenGL swizzle */
1307 unsigned swizzle
: 12;
1308 enum mali_texture_layout layout
: 4;
1309 uint8_t levels
: 8; /* Number of levels-1 if mipmapped, 0 if not */
1312 unsigned levels_unk
: 24; /* 0 */
1313 unsigned level_2
: 8; /* Number of levels, again? */
1317 uint16_t array_size
;
1322 } __attribute__((packed
));
1326 #define MALI_SAMP_MAG_NEAREST (1 << 0)
1327 #define MALI_SAMP_MIN_NEAREST (1 << 1)
1329 /* TODO: What do these bits mean individually? Only seen set together */
1331 #define MALI_SAMP_MIP_LINEAR_1 (1 << 3)
1332 #define MALI_SAMP_MIP_LINEAR_2 (1 << 4)
1334 /* Flag in filter_mode, corresponding to OpenCL's NORMALIZED_COORDS_TRUE
1335 * sampler_t flag. For typical OpenGL textures, this is always set. */
1337 #define MALI_SAMP_NORM_COORDS (1 << 5)
1339 /* Used for lod encoding. Thanks @urjaman for pointing out these routines can
1340 * be cleaned up a lot. */
1342 #define DECODE_FIXED_16(x) ((float) (x / 256.0))
1344 static inline int16_t
1345 FIXED_16(float x
, bool allow_negative
)
1347 /* Clamp inputs, accounting for float error */
1348 float max_lod
= (32.0 - (1.0 / 512.0));
1349 float min_lod
= allow_negative
? -max_lod
: 0.0;
1351 x
= ((x
> max_lod
) ? max_lod
: ((x
< min_lod
) ? min_lod
: x
));
1353 return (int) (x
* 256.0);
1356 struct mali_sampler_descriptor
{
1357 uint16_t filter_mode
;
1359 /* Fixed point, signed.
1360 * Upper 7 bits before the decimal point, although it caps [0-31].
1361 * Lower 8 bits after the decimal point: int(round(x * 256)) */
1367 /* All one word in reality, but packed a bit. Comparisons are flipped
1370 enum mali_wrap_mode wrap_s
: 4;
1371 enum mali_wrap_mode wrap_t
: 4;
1372 enum mali_wrap_mode wrap_r
: 4;
1373 enum mali_func compare_func
: 3;
1375 /* No effect on 2D textures. For cubemaps, set for ES3 and clear for
1376 * ES2, controlling seamless cubemapping */
1377 unsigned seamless_cube_map
: 1;
1382 float border_color
[4];
1383 } __attribute__((packed
));
1385 /* Bifrost sampler descriptors look pretty similar */
1387 #define BIFROST_SAMP_MIN_NEAREST (1)
1388 #define BIFROST_SAMP_MAG_LINEAR (1)
1390 struct bifrost_sampler_descriptor
{
1393 enum mali_wrap_mode wrap_r
: 4;
1394 enum mali_wrap_mode wrap_t
: 4;
1395 enum mali_wrap_mode wrap_s
: 4;
1399 uint8_t norm_coords
: 1;
1401 uint8_t min_filter
: 1;
1403 uint8_t mag_filter
: 1;
1404 uint8_t mip_filter
: 1;
1412 } __attribute__((packed
));
1414 /* viewport0/viewport1 form the arguments to glViewport. viewport1 is
1415 * modified by MALI_POSITIVE; viewport0 is as-is.
1418 struct mali_viewport
{
1419 /* XY clipping planes */
1425 /* Depth clipping planes */
1431 } __attribute__((packed
));
1433 /* From presentations, 16x16 tiles externally. Use shift for fast computation
1434 * of tile numbers. */
1436 #define MALI_TILE_SHIFT 4
1437 #define MALI_TILE_LENGTH (1 << MALI_TILE_SHIFT)
1439 /* Tile coordinates are stored as a compact u32, as only 12 bits are needed to
1440 * each component. Notice that this provides a theoretical upper bound of (1 <<
1441 * 12) = 4096 tiles in each direction, addressing a maximum framebuffer of size
1442 * 65536x65536. Multiplying that together, times another four given that Mali
1443 * framebuffers are 32-bit ARGB8888, means that this upper bound would take 16
1444 * gigabytes of RAM just to store the uncompressed framebuffer itself, let
1445 * alone rendering in real-time to such a buffer.
1449 /* From mali_kbase_10969_workaround.c */
1450 #define MALI_X_COORD_MASK 0x00000FFF
1451 #define MALI_Y_COORD_MASK 0x0FFF0000
1453 /* Extract parts of a tile coordinate */
1455 #define MALI_TILE_COORD_X(coord) ((coord) & MALI_X_COORD_MASK)
1456 #define MALI_TILE_COORD_Y(coord) (((coord) & MALI_Y_COORD_MASK) >> 16)
1458 /* Helpers to generate tile coordinates based on the boundary coordinates in
1459 * screen space. So, with the bounds (0, 0) to (128, 128) for the screen, these
1460 * functions would convert it to the bounding tiles (0, 0) to (7, 7).
1461 * Intentional "off-by-one"; finding the tile number is a form of fencepost
1464 #define MALI_MAKE_TILE_COORDS(X, Y) ((X) | ((Y) << 16))
1465 #define MALI_BOUND_TO_TILE(B, bias) ((B - bias) >> MALI_TILE_SHIFT)
1466 #define MALI_COORDINATE_TO_TILE(W, H, bias) MALI_MAKE_TILE_COORDS(MALI_BOUND_TO_TILE(W, bias), MALI_BOUND_TO_TILE(H, bias))
1467 #define MALI_COORDINATE_TO_TILE_MIN(W, H) MALI_COORDINATE_TO_TILE(W, H, 0)
1468 #define MALI_COORDINATE_TO_TILE_MAX(W, H) MALI_COORDINATE_TO_TILE(W, H, 1)
1470 struct mali_payload_fragment
{
1473 mali_ptr framebuffer
;
1474 } __attribute__((packed
));
1476 /* Single Framebuffer Descriptor */
1478 /* Flags apply to format. With just MSAA_A and MSAA_B, the framebuffer is
1479 * configured for 4x. With MSAA_8, it is configured for 8x. */
1481 #define MALI_SFBD_FORMAT_MSAA_8 (1 << 3)
1482 #define MALI_SFBD_FORMAT_MSAA_A (1 << 4)
1483 #define MALI_SFBD_FORMAT_MSAA_B (1 << 4)
1484 #define MALI_SFBD_FORMAT_SRGB (1 << 5)
1486 /* Fast/slow based on whether all three buffers are cleared at once */
1488 #define MALI_CLEAR_FAST (1 << 18)
1489 #define MALI_CLEAR_SLOW (1 << 28)
1490 #define MALI_CLEAR_SLOW_STENCIL (1 << 31)
1492 /* Configures hierarchical tiling on Midgard for both SFBD/MFBD (embedded
1493 * within the larget framebuffer descriptor). Analogous to
1494 * bifrost_tiler_heap_meta and bifrost_tiler_meta*/
1496 /* See pan_tiler.c for derivation */
1497 #define MALI_HIERARCHY_MASK ((1 << 9) - 1)
1499 /* Flag disabling the tiler for clear-only jobs, with
1500 hierarchical tiling */
1501 #define MALI_TILER_DISABLED (1 << 12)
1503 /* Flag selecting userspace-generated polygon list, for clear-only jobs without
1504 * hierarhical tiling. */
1505 #define MALI_TILER_USER 0xFFF
1507 /* Absent any geometry, the minimum size of the polygon list header */
1508 #define MALI_TILER_MINIMUM_HEADER_SIZE 0x200
1510 struct midgard_tiler_descriptor
{
1511 /* Size of the entire polygon list; see pan_tiler.c for the
1512 * computation. It's based on hierarchical tiling */
1514 u32 polygon_list_size
;
1516 /* Name known from the replay workaround in the kernel. What exactly is
1517 * flagged here is less known. We do that (tiler_hierarchy_mask & 0x1ff)
1518 * specifies a mask of hierarchy weights, which explains some of the
1519 * performance mysteries around setting it. We also see the bottom bit
1520 * of tiler_flags set in the kernel, but no comment why.
1522 * hierarchy_mask can have the TILER_DISABLED flag */
1527 /* See mali_tiler.c for an explanation */
1528 mali_ptr polygon_list
;
1529 mali_ptr polygon_list_body
;
1531 /* Names based on we see symmetry with replay jobs which name these
1534 mali_ptr heap_start
; /* tiler heap_free_address */
1537 /* Hierarchy weights. We know these are weights based on the kernel,
1538 * but I've never seen them be anything other than zero */
1542 enum mali_block_format
{
1543 MALI_BLOCK_TILED
= 0x0,
1544 MALI_BLOCK_UNKNOWN
= 0x1,
1545 MALI_BLOCK_LINEAR
= 0x2,
1546 MALI_BLOCK_AFBC
= 0x3,
1549 struct mali_sfbd_format
{
1553 /* mali_channel_swizzle */
1554 unsigned swizzle
: 12;
1557 unsigned nr_channels
: 2;
1562 enum mali_block_format block
: 2;
1568 /* Shared structure at the start of framebuffer descriptors, or used bare for
1569 * compute jobs, configuring stack and shared memory */
1571 struct mali_shared_memory
{
1572 u32 stack_shift
: 4;
1575 /* Configuration for shared memory for compute shaders.
1576 * shared_workgroup_count is logarithmic and may be computed for a
1577 * compute shader using shared memory as:
1579 * shared_workgroup_count = MAX2(ceil(log2(count_x)) + ... + ceil(log2(count_z), 10)
1581 * For compute shaders that don't use shared memory, or non-compute
1582 * shaders, this is set to ~0
1585 u32 shared_workgroup_count
: 5;
1586 u32 shared_unk1
: 3;
1587 u32 shared_shift
: 4;
1588 u32 shared_zero
: 20;
1590 mali_ptr scratchpad
;
1592 /* For compute shaders, the RAM backing of workgroup-shared memory. For
1593 * fragment shaders on Bifrost, apparently multisampling locations */
1595 mali_ptr shared_memory
;
1597 } __attribute__((packed
));
1599 /* Configures multisampling on Bifrost fragment jobs */
1601 struct bifrost_multisampling
{
1604 mali_ptr sample_locations
;
1606 } __attribute__((packed
));
1608 struct mali_single_framebuffer
{
1609 struct mali_shared_memory shared_memory
;
1610 struct mali_sfbd_format format
;
1615 /* Purposeful off-by-one in these fields should be accounted for by the
1616 * MALI_DIMENSION macro */
1623 u32 checksum_stride
;
1626 /* By default, the framebuffer is upside down from OpenGL's
1627 * perspective. Set framebuffer to the end and negate the stride to
1628 * flip in the Y direction */
1630 mali_ptr framebuffer
;
1635 /* Depth and stencil buffers are interleaved, it appears, as they are
1636 * set to the same address in captures. Both fields set to zero if the
1637 * buffer is not being cleared. Depending on GL_ENABLE magic, you might
1638 * get a zero enable despite the buffer being present; that still is
1641 mali_ptr depth_buffer
; // not SAME_VA
1642 u32 depth_stride_zero
: 4;
1643 u32 depth_stride
: 28;
1646 mali_ptr stencil_buffer
; // not SAME_VA
1647 u32 stencil_stride_zero
: 4;
1648 u32 stencil_stride
: 28;
1651 u32 clear_color_1
; // RGBA8888 from glClear, actually used by hardware
1652 u32 clear_color_2
; // always equal, but unclear function?
1653 u32 clear_color_3
; // always equal, but unclear function?
1654 u32 clear_color_4
; // always equal, but unclear function?
1656 /* Set to zero if not cleared */
1658 float clear_depth_1
; // float32, ditto
1659 float clear_depth_2
; // float32, ditto
1660 float clear_depth_3
; // float32, ditto
1661 float clear_depth_4
; // float32, ditto
1663 u32 clear_stencil
; // Exactly as it appears in OpenGL
1667 struct midgard_tiler_descriptor tiler
;
1669 /* More below this, maybe */
1670 } __attribute__((packed
));
1672 /* Format bits for the render target flags. Setting MSAA alone works for on
1673 * chip MSAA. Setting MSAA with the LAYERED flag works for MSAA where each
1674 * sample is its own image (implements the ES3 spec directly but inefficient on
1677 #define MALI_MFBD_FORMAT_LAYERED (1 << 0)
1678 #define MALI_MFBD_FORMAT_MSAA (1 << 1)
1679 #define MALI_MFBD_FORMAT_SRGB (1 << 2)
1681 struct mali_rt_format
{
1685 unsigned nr_channels
: 2; /* MALI_POSITIVE */
1689 enum mali_block_format block
: 2;
1692 unsigned swizzle
: 12;
1696 /* Disables MFBD preload. When this bit is set, the render target will
1697 * be cleared every frame. When this bit is clear, the hardware will
1698 * automatically wallpaper the render target back from main memory.
1699 * Unfortunately, MFBD preload is very broken on Midgard, so in
1700 * practice, this is a chicken bit that should always be set.
1701 * Discovered by accident, as all good chicken bits are. */
1703 unsigned no_preload
: 1;
1704 } __attribute__((packed
));
1706 /* Flags for afbc.flags and ds_afbc.flags */
1708 #define MALI_AFBC_FLAGS 0x10009
1710 /* Lossless RGB and RGBA colorspace transform */
1711 #define MALI_AFBC_YTR (1 << 17)
1713 struct mali_render_target
{
1714 struct mali_rt_format format
;
1719 /* Stuff related to ARM Framebuffer Compression. When AFBC is enabled,
1720 * there is an extra metadata buffer that contains 16 bytes per tile.
1721 * The framebuffer needs to be the same size as before, since we don't
1722 * know ahead of time how much space it will take up. The
1723 * framebuffer_stride is set to 0, since the data isn't stored linearly
1726 * When AFBC is disabled, these fields are zero.
1730 u32 stride
; // stride in units of tiles
1731 u32 flags
; // = 0x20000
1734 mali_ptr framebuffer
;
1737 u32 framebuffer_stride
: 28; // in units of bytes, row to next
1738 u32 layer_stride
; /* For multisample rendering */
1740 u32 clear_color_1
; // RGBA8888 from glClear, actually used by hardware
1741 u32 clear_color_2
; // always equal, but unclear function?
1742 u32 clear_color_3
; // always equal, but unclear function?
1743 u32 clear_color_4
; // always equal, but unclear function?
1744 } __attribute__((packed
));
1746 /* An optional part of mali_framebuffer. It comes between the main structure
1747 * and the array of render targets. It must be included if any of these are
1750 * - Transaction Elimination
1752 * - TODO: Anything else?
1756 #define MALI_EXTRA_PRESENT (0x10)
1759 #define MALI_EXTRA_ZS (0x4)
1761 struct mali_framebuffer_extra
{
1763 /* Each tile has an 8 byte checksum, so the stride is "width in tiles * 8" */
1764 u32 checksum_stride
;
1766 unsigned flags_lo
: 4;
1767 enum mali_block_format zs_block
: 2;
1768 unsigned flags_hi
: 26;
1771 /* Note: AFBC is only allowed for 24/8 combined depth/stencil. */
1773 mali_ptr depth_stencil_afbc_metadata
;
1774 u32 depth_stencil_afbc_stride
; // in units of tiles
1777 mali_ptr depth_stencil
;
1783 /* Depth becomes depth/stencil in case of combined D/S */
1785 u32 depth_stride_zero
: 4;
1786 u32 depth_stride
: 28;
1787 u32 depth_layer_stride
;
1790 u32 stencil_stride_zero
: 4;
1791 u32 stencil_stride
: 28;
1792 u32 stencil_layer_stride
;
1800 } __attribute__((packed
));
1802 /* Flags for mfbd_flags */
1804 /* Enables writing depth results back to main memory (rather than keeping them
1805 * on-chip in the tile buffer and then discarding) */
1807 #define MALI_MFBD_DEPTH_WRITE (1 << 10)
1809 /* The MFBD contains the extra mali_framebuffer_extra section */
1811 #define MALI_MFBD_EXTRA (1 << 13)
1813 struct mali_framebuffer
{
1815 struct mali_shared_memory shared_memory
;
1816 struct bifrost_multisampling msaa
;
1820 u16 width1
, height1
;
1822 u16 width2
, height2
;
1823 u32 unk1
: 19; // = 0x01000
1824 u32 rt_count_1
: 2; // off-by-one (use MALI_POSITIVE)
1825 u32 unk2
: 3; // = 0
1826 u32 rt_count_2
: 3; // no off-by-one
1829 u32 clear_stencil
: 8;
1830 u32 mfbd_flags
: 24; // = 0x100
1834 struct midgard_tiler_descriptor tiler
;
1836 mali_ptr tiler_meta
;
1841 /* optional: struct mali_framebuffer_extra extra */
1842 /* struct mali_render_target rts[] */
1843 } __attribute__((packed
));
1845 #endif /* __PANFROST_JOB_H__ */