/* * © Copyright 2017-2018 Alyssa Rosenzweig * © Copyright 2017-2018 Connor Abbott * © Copyright 2017-2018 Lyude Paul * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * */ #ifndef __PANFROST_JOB_H__ #define __PANFROST_JOB_H__ #include #include #define MALI_SHORT_PTR_BITS (sizeof(uintptr_t)*8) #define MALI_FBD_HIERARCHY_WEIGHTS 8 #define MALI_PAYLOAD_SIZE 256 typedef u32 mali_jd_core_req; enum mali_job_type { JOB_NOT_STARTED = 0, JOB_TYPE_NULL = 1, JOB_TYPE_SET_VALUE = 2, JOB_TYPE_CACHE_FLUSH = 3, JOB_TYPE_COMPUTE = 4, JOB_TYPE_VERTEX = 5, JOB_TYPE_GEOMETRY = 6, JOB_TYPE_TILER = 7, JOB_TYPE_FUSED = 8, JOB_TYPE_FRAGMENT = 9, }; enum mali_draw_mode { MALI_DRAW_NONE = 0x0, MALI_POINTS = 0x1, MALI_LINES = 0x2, MALI_LINE_STRIP = 0x4, MALI_LINE_LOOP = 0x6, MALI_TRIANGLES = 0x8, MALI_TRIANGLE_STRIP = 0xA, MALI_TRIANGLE_FAN = 0xC, MALI_POLYGON = 0xD, MALI_QUADS = 0xE, MALI_QUAD_STRIP = 0xF, /* All other modes invalid */ }; /* Applies to tiler_gl_enables */ #define MALI_OCCLUSION_QUERY (1 << 3) #define MALI_OCCLUSION_PRECISE (1 << 4) #define MALI_FRONT_FACE(v) (v << 5) #define MALI_CCW (0) #define MALI_CW (1) #define MALI_CULL_FACE_FRONT (1 << 6) #define MALI_CULL_FACE_BACK (1 << 7) /* TODO: Might this actually be a finer bitfield? */ #define MALI_DEPTH_STENCIL_ENABLE 0x6400 #define DS_ENABLE(field) \ (field == MALI_DEPTH_STENCIL_ENABLE) \ ? "MALI_DEPTH_STENCIL_ENABLE" \ : (field == 0) ? "0" \ : "0 /* XXX: Unknown, check hexdump */" /* Used in stencil and depth tests */ enum mali_func { MALI_FUNC_NEVER = 0, MALI_FUNC_LESS = 1, MALI_FUNC_EQUAL = 2, MALI_FUNC_LEQUAL = 3, MALI_FUNC_GREATER = 4, MALI_FUNC_NOTEQUAL = 5, MALI_FUNC_GEQUAL = 6, MALI_FUNC_ALWAYS = 7 }; /* Same OpenGL, but mixed up. Why? Because forget me, that's why! */ enum mali_alt_func { MALI_ALT_FUNC_NEVER = 0, MALI_ALT_FUNC_GREATER = 1, MALI_ALT_FUNC_EQUAL = 2, MALI_ALT_FUNC_GEQUAL = 3, MALI_ALT_FUNC_LESS = 4, MALI_ALT_FUNC_NOTEQUAL = 5, MALI_ALT_FUNC_LEQUAL = 6, MALI_ALT_FUNC_ALWAYS = 7 }; /* Flags apply to unknown2_3? */ #define MALI_HAS_MSAA (1 << 0) #define MALI_CAN_DISCARD (1 << 5) /* Applies on SFBD systems, specifying that programmable blending is in use */ #define MALI_HAS_BLEND_SHADER (1 << 6) /* func is mali_func */ #define MALI_DEPTH_FUNC(func) (func << 8) #define MALI_GET_DEPTH_FUNC(flags) ((flags >> 8) & 0x7) #define MALI_DEPTH_FUNC_MASK MALI_DEPTH_FUNC(0x7) #define MALI_DEPTH_TEST (1 << 11) /* Next flags to unknown2_4 */ #define MALI_STENCIL_TEST (1 << 0) /* What?! */ #define MALI_SAMPLE_ALPHA_TO_COVERAGE_NO_BLEND_SHADER (1 << 1) #define MALI_NO_DITHER (1 << 9) #define MALI_DEPTH_RANGE_A (1 << 12) #define MALI_DEPTH_RANGE_B (1 << 13) #define MALI_NO_MSAA (1 << 14) /* Stencil test state is all encoded in a single u32, just with a lot of * enums... */ enum mali_stencil_op { MALI_STENCIL_KEEP = 0, MALI_STENCIL_REPLACE = 1, MALI_STENCIL_ZERO = 2, MALI_STENCIL_INVERT = 3, MALI_STENCIL_INCR_WRAP = 4, MALI_STENCIL_DECR_WRAP = 5, MALI_STENCIL_INCR = 6, MALI_STENCIL_DECR = 7 }; struct mali_stencil_test { unsigned ref : 8; unsigned mask : 8; enum mali_func func : 3; enum mali_stencil_op sfail : 3; enum mali_stencil_op dpfail : 3; enum mali_stencil_op dppass : 3; unsigned zero : 4; } __attribute__((packed)); /* Blending is a mess, since anything fancy triggers a blend shader, and * -those- are not understood whatsover yet */ #define MALI_MASK_R (1 << 0) #define MALI_MASK_G (1 << 1) #define MALI_MASK_B (1 << 2) #define MALI_MASK_A (1 << 3) enum mali_nondominant_mode { MALI_BLEND_NON_MIRROR = 0, MALI_BLEND_NON_ZERO = 1 }; enum mali_dominant_blend { MALI_BLEND_DOM_SOURCE = 0, MALI_BLEND_DOM_DESTINATION = 1 }; enum mali_dominant_factor { MALI_DOMINANT_UNK0 = 0, MALI_DOMINANT_ZERO = 1, MALI_DOMINANT_SRC_COLOR = 2, MALI_DOMINANT_DST_COLOR = 3, MALI_DOMINANT_UNK4 = 4, MALI_DOMINANT_SRC_ALPHA = 5, MALI_DOMINANT_DST_ALPHA = 6, MALI_DOMINANT_CONSTANT = 7, }; enum mali_blend_modifier { MALI_BLEND_MOD_UNK0 = 0, MALI_BLEND_MOD_NORMAL = 1, MALI_BLEND_MOD_SOURCE_ONE = 2, MALI_BLEND_MOD_DEST_ONE = 3, }; struct mali_blend_mode { enum mali_blend_modifier clip_modifier : 2; unsigned unused_0 : 1; unsigned negate_source : 1; enum mali_dominant_blend dominant : 1; enum mali_nondominant_mode nondominant_mode : 1; unsigned unused_1 : 1; unsigned negate_dest : 1; enum mali_dominant_factor dominant_factor : 3; unsigned complement_dominant : 1; } __attribute__((packed)); struct mali_blend_equation { /* Of type mali_blend_mode */ unsigned rgb_mode : 12; unsigned alpha_mode : 12; unsigned zero1 : 4; /* Corresponds to MALI_MASK_* above and glColorMask arguments */ unsigned color_mask : 4; /* Attached constant for CONSTANT_ALPHA, etc */ #ifndef BIFROST float constant; #endif } __attribute__((packed)); /* Used with channel swizzling */ enum mali_channel { MALI_CHANNEL_RED = 0, MALI_CHANNEL_GREEN = 1, MALI_CHANNEL_BLUE = 2, MALI_CHANNEL_ALPHA = 3, MALI_CHANNEL_ZERO = 4, MALI_CHANNEL_ONE = 5, MALI_CHANNEL_RESERVED_0 = 6, MALI_CHANNEL_RESERVED_1 = 7, }; struct mali_channel_swizzle { enum mali_channel r : 3; enum mali_channel g : 3; enum mali_channel b : 3; enum mali_channel a : 3; } __attribute__((packed)); /* Compressed per-pixel formats. Each of these formats expands to one to four * floating-point or integer numbers, as defined by the OpenGL specification. * There are various places in OpenGL where the user can specify a compressed * format in memory, which all use the same 8-bit enum in the various * descriptors, although different hardware units support different formats. */ /* The top 3 bits specify how the bits of each component are interpreted. */ /* e.g. R11F_G11F_B10F */ #define MALI_FORMAT_SPECIAL (2 << 5) /* signed normalized, e.g. RGBA8_SNORM */ #define MALI_FORMAT_SNORM (3 << 5) /* e.g. RGBA8UI */ #define MALI_FORMAT_UINT (4 << 5) /* e.g. RGBA8 and RGBA32F */ #define MALI_FORMAT_UNORM (5 << 5) /* e.g. RGBA8I and RGBA16F */ #define MALI_FORMAT_SINT (6 << 5) /* These formats seem to largely duplicate the others. They're used at least * for Bifrost framebuffer output. */ #define MALI_FORMAT_SPECIAL2 (7 << 5) /* If the high 3 bits are 3 to 6 these two bits say how many components * there are. */ #define MALI_NR_CHANNELS(n) ((n - 1) << 3) /* If the high 3 bits are 3 to 6, then the low 3 bits say how big each * component is, except the special MALI_CHANNEL_FLOAT which overrides what the * bits mean. */ #define MALI_CHANNEL_4 2 #define MALI_CHANNEL_8 3 #define MALI_CHANNEL_16 4 #define MALI_CHANNEL_32 5 /* For MALI_FORMAT_SINT it means a half-float (e.g. RG16F). For * MALI_FORMAT_UNORM, it means a 32-bit float. */ #define MALI_CHANNEL_FLOAT 7 enum mali_format { MALI_RGB565 = MALI_FORMAT_SPECIAL | 0x0, MALI_RGB5_A1_UNORM = MALI_FORMAT_SPECIAL | 0x2, MALI_RGB10_A2_UNORM = MALI_FORMAT_SPECIAL | 0x3, MALI_RGB10_A2_SNORM = MALI_FORMAT_SPECIAL | 0x5, MALI_RGB10_A2UI = MALI_FORMAT_SPECIAL | 0x7, MALI_RGB10_A2I = MALI_FORMAT_SPECIAL | 0x9, /* YUV formats */ MALI_NV12 = MALI_FORMAT_SPECIAL | 0xc, MALI_Z32_UNORM = MALI_FORMAT_SPECIAL | 0xD, MALI_R32_FIXED = MALI_FORMAT_SPECIAL | 0x11, MALI_RG32_FIXED = MALI_FORMAT_SPECIAL | 0x12, MALI_RGB32_FIXED = MALI_FORMAT_SPECIAL | 0x13, MALI_RGBA32_FIXED = MALI_FORMAT_SPECIAL | 0x14, MALI_R11F_G11F_B10F = MALI_FORMAT_SPECIAL | 0x19, /* Only used for varyings, to indicate the transformed gl_Position */ MALI_VARYING_POS = MALI_FORMAT_SPECIAL | 0x1e, /* Only used for varyings, to indicate that the write should be * discarded. */ MALI_VARYING_DISCARD = MALI_FORMAT_SPECIAL | 0x1f, MALI_R8_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(1) | MALI_CHANNEL_8, MALI_R16_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(1) | MALI_CHANNEL_16, MALI_R32_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(1) | MALI_CHANNEL_32, MALI_RG8_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(2) | MALI_CHANNEL_8, MALI_RG16_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(2) | MALI_CHANNEL_16, MALI_RG32_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(2) | MALI_CHANNEL_32, MALI_RGB8_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_8, MALI_RGB16_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_16, MALI_RGB32_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_32, MALI_RGBA8_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_8, MALI_RGBA16_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_16, MALI_RGBA32_SNORM = MALI_FORMAT_SNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_32, MALI_R8UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(1) | MALI_CHANNEL_8, MALI_R16UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(1) | MALI_CHANNEL_16, MALI_R32UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(1) | MALI_CHANNEL_32, MALI_RG8UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(2) | MALI_CHANNEL_8, MALI_RG16UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(2) | MALI_CHANNEL_16, MALI_RG32UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(2) | MALI_CHANNEL_32, MALI_RGB8UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(3) | MALI_CHANNEL_8, MALI_RGB16UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(3) | MALI_CHANNEL_16, MALI_RGB32UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(3) | MALI_CHANNEL_32, MALI_RGBA8UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(4) | MALI_CHANNEL_8, MALI_RGBA16UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(4) | MALI_CHANNEL_16, MALI_RGBA32UI = MALI_FORMAT_UINT | MALI_NR_CHANNELS(4) | MALI_CHANNEL_32, MALI_R8_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(1) | MALI_CHANNEL_8, MALI_R16_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(1) | MALI_CHANNEL_16, MALI_R32_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(1) | MALI_CHANNEL_32, MALI_R32F = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(1) | MALI_CHANNEL_FLOAT, MALI_RG8_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(2) | MALI_CHANNEL_8, MALI_RG16_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(2) | MALI_CHANNEL_16, MALI_RG32_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(2) | MALI_CHANNEL_32, MALI_RG32F = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(2) | MALI_CHANNEL_FLOAT, MALI_RGB8_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_8, MALI_RGB16_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_16, MALI_RGB32_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_32, MALI_RGB32F = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_FLOAT, MALI_RGBA4_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_4, MALI_RGBA8_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_8, MALI_RGBA16_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_16, MALI_RGBA32_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_32, MALI_RGBA32F = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_FLOAT, MALI_R8I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(1) | MALI_CHANNEL_8, MALI_R16I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(1) | MALI_CHANNEL_16, MALI_R32I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(1) | MALI_CHANNEL_32, MALI_R16F = MALI_FORMAT_SINT | MALI_NR_CHANNELS(1) | MALI_CHANNEL_FLOAT, MALI_RG8I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(2) | MALI_CHANNEL_8, MALI_RG16I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(2) | MALI_CHANNEL_16, MALI_RG32I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(2) | MALI_CHANNEL_32, MALI_RG16F = MALI_FORMAT_SINT | MALI_NR_CHANNELS(2) | MALI_CHANNEL_FLOAT, MALI_RGB8I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(3) | MALI_CHANNEL_8, MALI_RGB16I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(3) | MALI_CHANNEL_16, MALI_RGB32I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(3) | MALI_CHANNEL_32, MALI_RGB16F = MALI_FORMAT_SINT | MALI_NR_CHANNELS(3) | MALI_CHANNEL_FLOAT, MALI_RGBA8I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(4) | MALI_CHANNEL_8, MALI_RGBA16I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(4) | MALI_CHANNEL_16, MALI_RGBA32I = MALI_FORMAT_SINT | MALI_NR_CHANNELS(4) | MALI_CHANNEL_32, MALI_RGBA16F = MALI_FORMAT_SINT | MALI_NR_CHANNELS(4) | MALI_CHANNEL_FLOAT, MALI_RGBA4 = MALI_FORMAT_SPECIAL2 | 0x8, MALI_RGBA8_2 = MALI_FORMAT_SPECIAL2 | 0xd, MALI_RGB10_A2_2 = MALI_FORMAT_SPECIAL2 | 0xe, }; /* Alpha coverage is encoded as 4-bits (from a clampf), with inversion * literally performing a bitwise invert. This function produces slightly wrong * results and I'm not sure why; some rounding issue I suppose... */ #define MALI_ALPHA_COVERAGE(clampf) ((uint16_t) (int) (clampf * 15.0f)) #define MALI_GET_ALPHA_COVERAGE(nibble) ((float) nibble / 15.0f) /* Applies to unknown1 */ #define MALI_NO_ALPHA_TO_COVERAGE (1 << 10) /* Flags denoting the fragment shader's use of tilebuffer readback. If the * shader might read any part of the tilebuffer, set MALI_READS_TILEBUFFER. If * it might read depth/stencil in particular, also set MALI_READS_ZS */ #define MALI_READS_ZS (1 << 12) #define MALI_READS_TILEBUFFER (1 << 16) struct mali_blend_meta { #ifndef BIFROST /* Base value of 0x200. * OR with 0x1 for blending (anything other than REPLACE). * OR with 0x2 for programmable blending */ u64 unk1; union { struct mali_blend_equation blend_equation_1; mali_ptr blend_shader; }; u64 zero2; struct mali_blend_equation blend_equation_2; #else u32 unk1; // = 0x200 struct mali_blend_equation blend_equation; /* * - 0x19 normally * - 0x3 when this slot is unused (everything else is 0 except the index) * - 0x11 when this is the fourth slot (and it's used) + * - 0 when there is a blend shader */ u16 unk2; /* increments from 0 to 3 */ u16 index; union { struct { /* So far, I've only seen: * - R001 for 1-component formats * - RG01 for 2-component formats * - RGB1 for 3-component formats * - RGBA for 4-component formats */ u32 swizzle : 12; enum mali_format format : 8; /* Type of the shader output variable. Note, this can * be different from the format. * * 0: f16 (mediump float) * 1: f32 (highp float) * 2: i32 (highp int) * 3: u32 (highp uint) * 4: i16 (mediump int) * 5: u16 (mediump uint) */ u32 shader_type : 3; u32 zero : 9; }; /* Only the low 32 bits of the blend shader are stored, the * high 32 bits are implicitly the same as the original shader. * According to the kernel driver, the program counter for * shaders is actually only 24 bits, so shaders cannot cross * the 2^24-byte boundary, and neither can the blend shader. * The blob handles this by allocating a 2^24 byte pool for * shaders, and making sure that any blend shaders are stored * in the same pool as the original shader. The kernel will * make sure this allocation is aligned to 2^24 bytes. */ u32 blend_shader; }; #endif } __attribute__((packed)); struct mali_shader_meta { mali_ptr shader; u16 texture_count; u16 sampler_count; u16 attribute_count; u16 varying_count; union { struct { u32 uniform_buffer_count : 4; u32 unk1 : 28; // = 0x800000 for vertex, 0x958020 for tiler } bifrost1; struct { /* 0x200 except MALI_NO_ALPHA_TO_COVERAGE. Mysterious 1 * other times. Who knows really? */ u16 unknown1; /* Whole number of uniform registers used, times two; * whole number of work registers used (no scale). */ unsigned work_count : 5; unsigned uniform_count : 5; unsigned unknown2 : 6; } midgard1; }; /* On bifrost: Exactly the same as glPolygonOffset() for both. * On midgard: Depth factor is exactly as passed to glPolygonOffset. * Depth units is equal to the value passed to glDeptOhffset + 1.0f * (use MALI_NEGATIVE) */ float depth_units; float depth_factor; u32 unknown2_2; u16 alpha_coverage; u16 unknown2_3; u8 stencil_mask_front; u8 stencil_mask_back; u16 unknown2_4; struct mali_stencil_test stencil_front; struct mali_stencil_test stencil_back; union { struct { u32 unk3 : 7; /* On Bifrost, some system values are preloaded in * registers R55-R62 by the thread dispatcher prior to * the start of shader execution. This is a bitfield * with one entry for each register saying which * registers need to be preloaded. Right now, the known * values are: * * Vertex/compute: * - R55 : gl_LocalInvocationID.xy * - R56 : gl_LocalInvocationID.z + unknown in high 16 bits * - R57 : gl_WorkGroupID.x * - R58 : gl_WorkGroupID.y * - R59 : gl_WorkGroupID.z * - R60 : gl_GlobalInvocationID.x * - R61 : gl_GlobalInvocationID.y/gl_VertexID (without base) * - R62 : gl_GlobalInvocationID.z/gl_InstanceID (without base) * * Fragment: * - R55 : unknown, never seen (but the bit for this is * always set?) * - R56 : unknown (bit always unset) * - R57 : gl_PrimitiveID * - R58 : gl_FrontFacing in low bit, potentially other stuff * - R59 : u16 fragment coordinates (used to compute * gl_FragCoord.xy, together with sample positions) * - R60 : gl_SampleMask (used in epilog, so pretty * much always used, but the bit is always 0 -- is * this just always pushed?) * - R61 : gl_SampleMaskIn and gl_SampleID, used by * varying interpolation. * - R62 : unknown (bit always unset). */ u32 preload_regs : 8; /* In units of 8 bytes or 64 bits, since the * uniform/const port loads 64 bits at a time. */ u32 uniform_count : 7; u32 unk4 : 10; // = 2 } bifrost2; struct { u32 unknown2_7; } midgard2; }; /* zero on bifrost */ u32 unknown2_8; /* Blending information for the older non-MRT Midgard HW. Check for * MALI_HAS_BLEND_SHADER to decide how to interpret. */ union { mali_ptr blend_shader; struct mali_blend_equation blend_equation; }; /* There can be up to 4 blend_meta's. None of them are required for * vertex shaders or the non-MRT case for Midgard (so the blob doesn't * allocate any space). */ struct mali_blend_meta blend_meta[]; } __attribute__((packed)); /* This only concerns hardware jobs */ /* Possible values for job_descriptor_size */ #define MALI_JOB_32 0 #define MALI_JOB_64 1 struct mali_job_descriptor_header { u32 exception_status; u32 first_incomplete_task; u64 fault_pointer; u8 job_descriptor_size : 1; enum mali_job_type job_type : 7; u8 job_barrier : 1; u8 unknown_flags : 7; u16 job_index; u16 job_dependency_index_1; u16 job_dependency_index_2; union { u64 next_job_64; u32 next_job_32; }; } __attribute__((packed)); struct mali_payload_set_value { u64 out; u64 unknown; } __attribute__((packed)); /* Special attributes have a fixed index */ #define MALI_SPECIAL_ATTRIBUTE_BASE 16 #define MALI_VERTEX_ID (MALI_SPECIAL_ATTRIBUTE_BASE + 0) #define MALI_INSTANCE_ID (MALI_SPECIAL_ATTRIBUTE_BASE + 1) /* * Mali Attributes * * This structure lets the attribute unit compute the address of an attribute * given the vertex and instance ID. Unfortunately, the way this works is * rather complicated when instancing is enabled. * * To explain this, first we need to explain how compute and vertex threads are * dispatched. This is a guess (although a pretty firm guess!) since the * details are mostly hidden from the driver, except for attribute instancing. * When a quad is dispatched, it receives a single, linear index. However, we * need to translate that index into a (vertex id, instance id) pair, or a * (local id x, local id y, local id z) triple for compute shaders (although * vertex shaders and compute shaders are handled almost identically). * Focusing on vertex shaders, one option would be to do: * * vertex_id = linear_id % num_vertices * instance_id = linear_id / num_vertices * * but this involves a costly division and modulus by an arbitrary number. * Instead, we could pad num_vertices. We dispatch padded_num_vertices * * num_instances threads instead of num_vertices * num_instances, which results * in some "extra" threads with vertex_id >= num_vertices, which we have to * discard. The more we pad num_vertices, the more "wasted" threads we * dispatch, but the division is potentially easier. * * One straightforward choice is to pad num_vertices to the next power of two, * which means that the division and modulus are just simple bit shifts and * masking. But the actual algorithm is a bit more complicated. The thread * dispatcher has special support for dividing by 3, 5, 7, and 9, in addition * to dividing by a power of two. This is possibly using the technique * described in patent US20170010862A1. As a result, padded_num_vertices can be * 1, 3, 5, 7, or 9 times a power of two. This results in less wasted threads, * since we need less padding. * * padded_num_vertices is picked by the hardware. The driver just specifies the * actual number of vertices. At least for Mali G71, the first few cases are * given by: * * num_vertices | padded_num_vertices * 3 | 4 * 4-7 | 8 * 8-11 | 12 (3 * 4) * 12-15 | 16 * 16-19 | 20 (5 * 4) * * Note that padded_num_vertices is a multiple of four (presumably because * threads are dispatched in groups of 4). Also, padded_num_vertices is always * at least one more than num_vertices, which seems like a quirk of the * hardware. For larger num_vertices, the hardware uses the following * algorithm: using the binary representation of num_vertices, we look at the * most significant set bit as well as the following 3 bits. Let n be the * number of bits after those 4 bits. Then we set padded_num_vertices according * to the following table: * * high bits | padded_num_vertices * 1000 | 9 * 2^n * 1001 | 5 * 2^(n+1) * 101x | 3 * 2^(n+2) * 110x | 7 * 2^(n+1) * 111x | 2^(n+4) * * For example, if num_vertices = 70 is passed to glDraw(), its binary * representation is 1000110, so n = 3 and the high bits are 1000, and * therefore padded_num_vertices = 9 * 2^3 = 72. * * The attribute unit works in terms of the original linear_id. if * num_instances = 1, then they are the same, and everything is simple. * However, with instancing things get more complicated. There are four * possible modes, two of them we can group together: * * 1. Use the linear_id directly. Only used when there is no instancing. * * 2. Use the linear_id modulo a constant. This is used for per-vertex * attributes with instancing enabled by making the constant equal * padded_num_vertices. Because the modulus is always padded_num_vertices, this * mode only supports a modulus that is a power of 2 times 1, 3, 5, 7, or 9. * The shift field specifies the power of two, while the extra_flags field * specifies the odd number. If shift = n and extra_flags = m, then the modulus * is (2m + 1) * 2^n. As an example, if num_vertices = 70, then as computed * above, padded_num_vertices = 9 * 2^3, so we should set extra_flags = 4 and * shift = 3. Note that we must exactly follow the hardware algorithm used to * get padded_num_vertices in order to correctly implement per-vertex * attributes. * * 3. Divide the linear_id by a constant. In order to correctly implement * instance divisors, we have to divide linear_id by padded_num_vertices times * to user-specified divisor. So first we compute padded_num_vertices, again * following the exact same algorithm that the hardware uses, then multiply it * by the GL-level divisor to get the hardware-level divisor. This case is * further divided into two more cases. If the hardware-level divisor is a * power of two, then we just need to shift. The shift amount is specified by * the shift field, so that the hardware-level divisor is just 2^shift. * * If it isn't a power of two, then we have to divide by an arbitrary integer. * For that, we use the well-known technique of multiplying by an approximation * of the inverse. The driver must compute the magic multiplier and shift * amount, and then the hardware does the multiplication and shift. The * hardware and driver also use the "round-down" optimization as described in * http://ridiculousfish.com/files/faster_unsigned_division_by_constants.pdf. * The hardware further assumes the multiplier is between 2^31 and 2^32, so the * high bit is implicitly set to 1 even though it is set to 0 by the driver -- * presumably this simplifies the hardware multiplier a little. The hardware * first multiplies linear_id by the multiplier and takes the high 32 bits, * then applies the round-down correction if extra_flags = 1, then finally * shifts right by the shift field. * * There are some differences between ridiculousfish's algorithm and the Mali * hardware algorithm, which means that the reference code from ridiculousfish * doesn't always produce the right constants. Mali does not use the pre-shift * optimization, since that would make a hardware implementation slower (it * would have to always do the pre-shift, multiply, and post-shift operations). * It also forces the multplier to be at least 2^31, which means that the * exponent is entirely fixed, so there is no trial-and-error. Altogether, * given the divisor d, the algorithm the driver must follow is: * * 1. Set shift = floor(log2(d)). * 2. Compute m = ceil(2^(shift + 32) / d) and e = 2^(shift + 32) % d. * 3. If e <= 2^shift, then we need to use the round-down algorithm. Set * magic_divisor = m - 1 and extra_flags = 1. * 4. Otherwise, set magic_divisor = m and extra_flags = 0. */ enum mali_attr_mode { MALI_ATTR_UNUSED = 0, MALI_ATTR_LINEAR = 1, MALI_ATTR_POT_DIVIDE = 2, MALI_ATTR_MODULO = 3, MALI_ATTR_NPOT_DIVIDE = 4, }; /* This magic "pseudo-address" is used as `elements` to implement * gl_PointCoord. When read from a fragment shader, it generates a point * coordinate per the OpenGL ES 2.0 specification. Flipped coordinate spaces * require an affine transformation in the shader. */ #define MALI_VARYING_POINT_COORD (0x60) union mali_attr { /* This is used for actual attributes. */ struct { /* The bottom 3 bits are the mode */ mali_ptr elements : 64 - 8; u32 shift : 5; u32 extra_flags : 3; u32 stride; u32 size; }; /* The entry after an NPOT_DIVIDE entry has this format. It stores * extra information that wouldn't fit in a normal entry. */ struct { u32 unk; /* = 0x20 */ u32 magic_divisor; u32 zero; /* This is the original, GL-level divisor. */ u32 divisor; }; } __attribute__((packed)); struct mali_attr_meta { /* Vertex buffer index */ u8 index; unsigned unknown1 : 2; unsigned swizzle : 12; enum mali_format format : 8; /* Always observed to be zero at the moment */ unsigned unknown3 : 2; /* When packing multiple attributes in a buffer, offset addresses by this value */ uint32_t src_offset; } __attribute__((packed)); enum mali_fbd_type { MALI_SFBD = 0, MALI_MFBD = 1, }; #define FBD_TYPE (1) #define FBD_MASK (~0x3f) struct mali_uniform_buffer_meta { /* This is actually the size minus 1 (MALI_POSITIVE), in units of 16 * bytes. This gives a maximum of 2^14 bytes, which just so happens to * be the GL minimum-maximum for GL_MAX_UNIFORM_BLOCK_SIZE. */ u64 size : 10; /* This is missing the bottom 2 bits and top 8 bits. The top 8 bits * should be 0 for userspace pointers, according to * https://lwn.net/Articles/718895/. By reusing these bits, we can make * each entry in the table only 64 bits. */ mali_ptr ptr : 64 - 10; }; /* On Bifrost, these fields are the same between the vertex and tiler payloads. * They also seem to be the same between Bifrost and Midgard. They're shared in * fused payloads. */ /* Applies to unknown_draw */ #define MALI_DRAW_INDEXED_UINT8 (0x10) #define MALI_DRAW_INDEXED_UINT16 (0x20) #define MALI_DRAW_INDEXED_UINT32 (0x30) #define MALI_DRAW_VARYING_SIZE (0x100) #define MALI_DRAW_PRIMITIVE_RESTART_FIXED_INDEX (0x10000) struct mali_vertex_tiler_prefix { /* This is a dynamic bitfield containing the following things in this order: * * - gl_WorkGroupSize.x * - gl_WorkGroupSize.y * - gl_WorkGroupSize.z * - gl_NumWorkGroups.x * - gl_NumWorkGroups.y * - gl_NumWorkGroups.z * * The number of bits allocated for each number is based on the *_shift * fields below. For example, workgroups_y_shift gives the bit that * gl_NumWorkGroups.y starts at, and workgroups_z_shift gives the bit * that gl_NumWorkGroups.z starts at (and therefore one after the bit * that gl_NumWorkGroups.y ends at). The actual value for each gl_* * value is one more than the stored value, since if any of the values * are zero, then there would be no invocations (and hence no job). If * there were 0 bits allocated to a given field, then it must be zero, * and hence the real value is one. * * Vertex jobs reuse the same job dispatch mechanism as compute jobs, * effectively doing glDispatchCompute(1, vertex_count, instance_count) * where vertex count is the number of vertices. */ u32 invocation_count; u32 size_y_shift : 5; u32 size_z_shift : 5; u32 workgroups_x_shift : 6; u32 workgroups_y_shift : 6; u32 workgroups_z_shift : 6; /* This is max(workgroups_x_shift, 2) in all the cases I've seen. */ u32 workgroups_x_shift_2 : 4; u32 draw_mode : 4; u32 unknown_draw : 22; /* This is the the same as workgroups_x_shift_2 in compute shaders, but * always 5 for vertex jobs and 6 for tiler jobs. I suspect this has * something to do with how many quads get put in the same execution * engine, which is a balance (you don't want to starve the engine, but * you also want to distribute work evenly). */ u32 workgroups_x_shift_3 : 6; /* Negative of draw_start for TILER jobs from what I've seen */ int32_t negative_start; u32 zero1; /* Like many other strictly nonzero quantities, index_count is * subtracted by one. For an indexed cube, this is equal to 35 = 6 * faces * 2 triangles/per face * 3 vertices/per triangle - 1. That is, * for an indexed draw, index_count is the number of actual vertices * rendered whereas invocation_count is the number of unique vertices * rendered (the number of times the vertex shader must be invoked). * For non-indexed draws, this is just equal to invocation_count. */ u32 index_count; /* No hidden structure; literally just a pointer to an array of uint * indices (width depends on flags). Thanks, guys, for not making my * life insane for once! NULL for non-indexed draws. */ uintptr_t indices; } __attribute__((packed)); /* Point size / line width can either be specified as a 32-bit float (for * constant size) or as a [machine word size]-bit GPU pointer (for varying size). If a pointer * is selected, by setting the appropriate MALI_DRAW_VARYING_SIZE bit in the tiler * payload, the contents of varying_pointer will be intepreted as an array of * fp16 sizes, one for each vertex. gl_PointSize is therefore implemented by * creating a special MALI_R16F varying writing to varying_pointer. */ union midgard_primitive_size { float constant; uintptr_t pointer; }; struct bifrost_vertex_only { u32 unk2; /* =0x2 */ u32 zero0; u64 zero1; } __attribute__((packed)); struct bifrost_tiler_heap_meta { u32 zero; u32 heap_size; /* note: these are just guesses! */ mali_ptr tiler_heap_start; mali_ptr tiler_heap_free; mali_ptr tiler_heap_end; /* hierarchy weights? but they're still 0 after the job has run... */ u32 zeros[12]; } __attribute__((packed)); struct bifrost_tiler_meta { u64 zero0; u32 unk; // = 0xf0 u16 width; u16 height; u64 zero1; mali_ptr tiler_heap_meta; /* TODO what is this used for? */ u64 zeros[20]; } __attribute__((packed)); struct bifrost_tiler_only { /* 0x20 */ union midgard_primitive_size primitive_size; mali_ptr tiler_meta; u64 zero1, zero2, zero3, zero4, zero5, zero6; u32 gl_enables; u32 zero7; u64 zero8; } __attribute__((packed)); struct bifrost_scratchpad { u32 zero; u32 flags; // = 0x1f /* This is a pointer to a CPU-inaccessible buffer, 16 pages, allocated * during startup. It seems to serve the same purpose as the * gpu_scratchpad in the SFBD for Midgard, although it's slightly * larger. */ mali_ptr gpu_scratchpad; } __attribute__((packed)); struct mali_vertex_tiler_postfix { /* Zero for vertex jobs. Pointer to the position (gl_Position) varying * output from the vertex shader for tiler jobs. */ uintptr_t position_varying; /* An array of mali_uniform_buffer_meta's. The size is given by the * shader_meta. */ uintptr_t uniform_buffers; /* This is a pointer to an array of pointers to the texture * descriptors, number of pointers bounded by number of textures. The * indirection is needed to accomodate varying numbers and sizes of * texture descriptors */ uintptr_t texture_trampoline; /* For OpenGL, from what I've seen, this is intimately connected to * texture_meta. cwabbott says this is not the case under Vulkan, hence * why this field is seperate (Midgard is Vulkan capable). Pointer to * array of sampler descriptors (which are uniform in size) */ uintptr_t sampler_descriptor; uintptr_t uniforms; u8 flags : 4; uintptr_t _shader_upper : MALI_SHORT_PTR_BITS - 4; /* struct shader_meta */ uintptr_t attributes; /* struct attribute_buffer[] */ uintptr_t attribute_meta; /* attribute_meta[] */ uintptr_t varyings; /* struct attr */ uintptr_t varying_meta; /* pointer */ uintptr_t viewport; uintptr_t occlusion_counter; /* A single bit as far as I can tell */ /* Note: on Bifrost, this isn't actually the FBD. It points to * bifrost_scratchpad instead. However, it does point to the same thing * in vertex and tiler jobs. */ mali_ptr framebuffer; #ifdef __LP64__ #ifdef BIFROST /* most likely padding to make this a multiple of 64 bytes */ u64 zero7; #endif #endif } __attribute__((packed)); struct midgard_payload_vertex_tiler { #ifndef __LP64__ union midgard_primitive_size primitive_size; #endif struct mali_vertex_tiler_prefix prefix; #ifndef __LP64__ u32 zero3; #endif u32 gl_enables; // 0x5 /* Offset for first vertex in buffer */ u32 draw_start; uintptr_t zero5; struct mali_vertex_tiler_postfix postfix; #ifdef __LP64__ union midgard_primitive_size primitive_size; #endif } __attribute__((packed)); struct bifrost_payload_vertex { struct mali_vertex_tiler_prefix prefix; struct bifrost_vertex_only vertex; struct mali_vertex_tiler_postfix postfix; } __attribute__((packed)); struct bifrost_payload_tiler { struct mali_vertex_tiler_prefix prefix; struct bifrost_tiler_only tiler; struct mali_vertex_tiler_postfix postfix; } __attribute__((packed)); struct bifrost_payload_fused { struct mali_vertex_tiler_prefix prefix; struct bifrost_tiler_only tiler; struct mali_vertex_tiler_postfix tiler_postfix; struct bifrost_vertex_only vertex; struct mali_vertex_tiler_postfix vertex_postfix; } __attribute__((packed)); /* Pointed to from texture_trampoline, mostly unknown still, haven't * managed to replay successfully */ /* Purposeful off-by-one in width, height fields. For example, a (64, 64) * texture is stored as (63, 63) in these fields. This adjusts for that. * There's an identical pattern in the framebuffer descriptor. Even vertex * count fields work this way, hence the generic name -- integral fields that * are strictly positive generally need this adjustment. */ #define MALI_POSITIVE(dim) (dim - 1) /* Opposite of MALI_POSITIVE, found in the depth_units field */ #define MALI_NEGATIVE(dim) (dim + 1) /* Used with wrapping. Incomplete (this is a 4-bit field...) */ enum mali_wrap_mode { MALI_WRAP_REPEAT = 0x8, MALI_WRAP_CLAMP_TO_EDGE = 0x9, MALI_WRAP_CLAMP_TO_BORDER = 0xB, MALI_WRAP_MIRRORED_REPEAT = 0xC }; /* 8192x8192 */ #define MAX_MIP_LEVELS (13) /* Cubemap bloats everything up */ #define MAX_FACES (6) /* Corresponds to the type passed to glTexImage2D and so forth */ struct mali_texture_format { unsigned swizzle : 12; enum mali_format format : 8; unsigned usage1 : 3; unsigned is_not_cubemap : 1; unsigned usage2 : 8; } __attribute__((packed)); struct mali_texture_descriptor { uint16_t width; uint16_t height; uint16_t depth; uint16_t unknown1; struct mali_texture_format format; uint16_t unknown3; /* One for non-mipmapped, zero for mipmapped */ uint8_t unknown3A; /* Zero for non-mipmapped, (number of levels - 1) for mipmapped */ uint8_t nr_mipmap_levels; /* Swizzling is a single 32-bit word, broken up here for convenience. * Here, swizzling refers to the ES 3.0 texture parameters for channel * level swizzling, not the internal pixel-level swizzling which is * below OpenGL's reach */ unsigned swizzle : 12; unsigned swizzle_zero : 20; uint32_t unknown5; uint32_t unknown6; uint32_t unknown7; mali_ptr swizzled_bitmaps[MAX_MIP_LEVELS * MAX_FACES]; } __attribute__((packed)); /* Used as part of filter_mode */ #define MALI_LINEAR 0 #define MALI_NEAREST 1 #define MALI_MIP_LINEAR (0x18) /* Used to construct low bits of filter_mode */ #define MALI_TEX_MAG(mode) (((mode) & 1) << 0) #define MALI_TEX_MIN(mode) (((mode) & 1) << 1) #define MALI_TEX_MAG_MASK (1) #define MALI_TEX_MIN_MASK (2) #define MALI_FILTER_NAME(filter) (filter ? "MALI_NEAREST" : "MALI_LINEAR") /* Used for lod encoding. Thanks @urjaman for pointing out these routines can * be cleaned up a lot. */ #define DECODE_FIXED_16(x) ((float) (x / 256.0)) static inline uint16_t FIXED_16(float x) { /* Clamp inputs, accounting for float error */ float max_lod = (32.0 - (1.0 / 512.0)); x = ((x > max_lod) ? max_lod : ((x < 0.0) ? 0.0 : x)); return (int) (x * 256.0); } struct mali_sampler_descriptor { uint32_t filter_mode; /* Fixed point. Upper 8-bits is before the decimal point, although it * caps [0-31]. Lower 8-bits is after the decimal point: int(round(x * * 256)) */ uint16_t min_lod; uint16_t max_lod; /* All one word in reality, but packed a bit */ enum mali_wrap_mode wrap_s : 4; enum mali_wrap_mode wrap_t : 4; enum mali_wrap_mode wrap_r : 4; enum mali_alt_func compare_func : 3; /* A single set bit of unknown, ha! */ unsigned unknown2 : 1; unsigned zero : 16; uint32_t zero2; float border_color[4]; } __attribute__((packed)); /* TODO: What are the floats? Apparently always { -inf, -inf, inf, inf }, * unless the scissor test is enabled. * * viewport0/viewport1 form the arguments to glViewport. viewport1 is modified * by MALI_POSITIVE; viewport0 is as-is. */ struct mali_viewport { /* XY clipping planes */ float clip_minx; float clip_miny; float clip_maxx; float clip_maxy; /* Depth clipping planes */ float clip_minz; float clip_maxz; u16 viewport0[2]; u16 viewport1[2]; } __attribute__((packed)); /* From presentations, 16x16 tiles externally. Use shift for fast computation * of tile numbers. */ #define MALI_TILE_SHIFT 4 #define MALI_TILE_LENGTH (1 << MALI_TILE_SHIFT) /* Tile coordinates are stored as a compact u32, as only 12 bits are needed to * each component. Notice that this provides a theoretical upper bound of (1 << * 12) = 4096 tiles in each direction, addressing a maximum framebuffer of size * 65536x65536. Multiplying that together, times another four given that Mali * framebuffers are 32-bit ARGB8888, means that this upper bound would take 16 * gigabytes of RAM just to store the uncompressed framebuffer itself, let * alone rendering in real-time to such a buffer. * * Nice job, guys.*/ /* From mali_kbase_10969_workaround.c */ #define MALI_X_COORD_MASK 0x00000FFF #define MALI_Y_COORD_MASK 0x0FFF0000 /* Extract parts of a tile coordinate */ #define MALI_TILE_COORD_X(coord) ((coord) & MALI_X_COORD_MASK) #define MALI_TILE_COORD_Y(coord) (((coord) & MALI_Y_COORD_MASK) >> 16) #define MALI_TILE_COORD_FLAGS(coord) ((coord) & ~(MALI_X_COORD_MASK | MALI_Y_COORD_MASK)) /* No known flags yet, but just in case...? */ #define MALI_TILE_NO_FLAG (0) /* Helpers to generate tile coordinates based on the boundary coordinates in * screen space. So, with the bounds (0, 0) to (128, 128) for the screen, these * functions would convert it to the bounding tiles (0, 0) to (7, 7). * Intentional "off-by-one"; finding the tile number is a form of fencepost * problem. */ #define MALI_MAKE_TILE_COORDS(X, Y) ((X) | ((Y) << 16)) #define MALI_BOUND_TO_TILE(B, bias) ((B - bias) >> MALI_TILE_SHIFT) #define MALI_COORDINATE_TO_TILE(W, H, bias) MALI_MAKE_TILE_COORDS(MALI_BOUND_TO_TILE(W, bias), MALI_BOUND_TO_TILE(H, bias)) #define MALI_COORDINATE_TO_TILE_MIN(W, H) MALI_COORDINATE_TO_TILE(W, H, 0) #define MALI_COORDINATE_TO_TILE_MAX(W, H) MALI_COORDINATE_TO_TILE(W, H, 1) struct mali_payload_fragment { u32 min_tile_coord; u32 max_tile_coord; mali_ptr framebuffer; } __attribute__((packed)); /* (Single?) Framebuffer Descriptor */ /* Flags apply to format. With just MSAA_A and MSAA_B, the framebuffer is * configured for 4x. With MSAA_8, it is configured for 8x. */ #define MALI_FRAMEBUFFER_MSAA_8 (1 << 3) #define MALI_FRAMEBUFFER_MSAA_A (1 << 4) #define MALI_FRAMEBUFFER_MSAA_B (1 << 23) /* Fast/slow based on whether all three buffers are cleared at once */ #define MALI_CLEAR_FAST (1 << 18) #define MALI_CLEAR_SLOW (1 << 28) #define MALI_CLEAR_SLOW_STENCIL (1 << 31) struct mali_single_framebuffer { u32 unknown1; u32 unknown2; u64 unknown_address_0; u64 zero1; u64 zero0; /* Exact format is ironically not known, since EGL is finnicky with the * blob. MSAA, colourspace, etc are configured here. */ u32 format; u32 clear_flags; u32 zero2; /* Purposeful off-by-one in these fields should be accounted for by the * MALI_DIMENSION macro */ u16 width; u16 height; u32 zero3[8]; /* By default, the framebuffer is upside down from OpenGL's * perspective. Set framebuffer to the end and negate the stride to * flip in the Y direction */ mali_ptr framebuffer; int32_t stride; u32 zero4; /* Depth and stencil buffers are interleaved, it appears, as they are * set to the same address in captures. Both fields set to zero if the * buffer is not being cleared. Depending on GL_ENABLE magic, you might * get a zero enable despite the buffer being present; that still is * disabled. */ mali_ptr depth_buffer; // not SAME_VA u64 depth_buffer_enable; mali_ptr stencil_buffer; // not SAME_VA u64 stencil_buffer_enable; u32 clear_color_1; // RGBA8888 from glClear, actually used by hardware u32 clear_color_2; // always equal, but unclear function? u32 clear_color_3; // always equal, but unclear function? u32 clear_color_4; // always equal, but unclear function? /* Set to zero if not cleared */ float clear_depth_1; // float32, ditto float clear_depth_2; // float32, ditto float clear_depth_3; // float32, ditto float clear_depth_4; // float32, ditto u32 clear_stencil; // Exactly as it appears in OpenGL u32 zero6[7]; /* Very weird format, see generation code in trans_builder.c */ u32 resolution_check; u32 tiler_flags; u64 unknown_address_1; /* Pointing towards... a zero buffer? */ u64 unknown_address_2; /* See mali_kbase_replay.c */ u64 tiler_heap_free; u64 tiler_heap_end; /* More below this, maybe */ } __attribute__((packed)); /* Format bits for the render target flags */ #define MALI_MFBD_FORMAT_AFBC (1 << 5) #define MALI_MFBD_FORMAT_MSAA (1 << 7) struct mali_rt_format { unsigned unk1 : 32; unsigned unk2 : 3; unsigned nr_channels : 2; /* MALI_POSITIVE */ unsigned flags : 11; unsigned swizzle : 12; unsigned unk4 : 4; } __attribute__((packed)); struct bifrost_render_target { struct mali_rt_format format; u64 zero1; union { struct { /* Stuff related to ARM Framebuffer Compression. When AFBC is enabled, * there is an extra metadata buffer that contains 16 bytes per tile. * The framebuffer needs to be the same size as before, since we don't * know ahead of time how much space it will take up. The * framebuffer_stride is set to 0, since the data isn't stored linearly * anymore. */ mali_ptr metadata; u32 stride; // stride in units of tiles u32 unk; // = 0x20000 } afbc; struct { /* Heck if I know */ u64 unk; mali_ptr pointer; } chunknown; }; mali_ptr framebuffer; u32 zero2 : 4; u32 framebuffer_stride : 28; // in units of bytes u32 zero3; u32 clear_color_1; // RGBA8888 from glClear, actually used by hardware u32 clear_color_2; // always equal, but unclear function? u32 clear_color_3; // always equal, but unclear function? u32 clear_color_4; // always equal, but unclear function? } __attribute__((packed)); /* An optional part of bifrost_framebuffer. It comes between the main structure * and the array of render targets. It must be included if any of these are * enabled: * * - Transaction Elimination * - Depth/stencil * - TODO: Anything else? */ /* Flags field: note, these are guesses */ #define MALI_EXTRA_PRESENT (0x400) #define MALI_EXTRA_AFBC (0x20) #define MALI_EXTRA_AFBC_ZS (0x10) #define MALI_EXTRA_ZS (0x4) struct bifrost_fb_extra { mali_ptr checksum; /* Each tile has an 8 byte checksum, so the stride is "width in tiles * 8" */ u32 checksum_stride; u32 flags; union { /* Note: AFBC is only allowed for 24/8 combined depth/stencil. */ struct { mali_ptr depth_stencil_afbc_metadata; u32 depth_stencil_afbc_stride; // in units of tiles u32 zero1; mali_ptr depth_stencil; u64 padding; } ds_afbc; struct { /* Depth becomes depth/stencil in case of combined D/S */ mali_ptr depth; u32 depth_stride_zero : 4; u32 depth_stride : 28; u32 zero1; mali_ptr stencil; u32 stencil_stride_zero : 4; u32 stencil_stride : 28; u32 zero2; } ds_linear; }; u64 zero3, zero4; } __attribute__((packed)); /* flags for unk3 */ /* Enables writing depth results back to main memory (rather than keeping them * on-chip in the tile buffer and then discarding) */ #define MALI_MFBD_DEPTH_WRITE (1 << 10) /* The MFBD contains the extra bifrost_fb_extra section */ #define MALI_MFBD_EXTRA (1 << 13) struct bifrost_framebuffer { u32 unk0; // = 0x10 u32 unknown2; // = 0x1f, same as SFBD mali_ptr scratchpad; /* 0x10 */ mali_ptr sample_locations; mali_ptr unknown1; /* 0x20 */ u16 width1, height1; u32 zero3; u16 width2, height2; u32 unk1 : 19; // = 0x01000 u32 rt_count_1 : 2; // off-by-one (use MALI_POSITIVE) u32 unk2 : 3; // = 0 u32 rt_count_2 : 3; // no off-by-one u32 zero4 : 5; /* 0x30 */ u32 clear_stencil : 8; u32 unk3 : 24; // = 0x100 float clear_depth; mali_ptr tiler_meta; /* 0x40 */ /* Note: these are guesses! */ mali_ptr tiler_scratch_start; mali_ptr tiler_scratch_middle; /* These are not, since we see symmetry with replay jobs which name these explicitly */ mali_ptr tiler_heap_start; mali_ptr tiler_heap_end; u64 zero9, zero10, zero11, zero12; /* optional: struct bifrost_fb_extra extra */ /* struct bifrost_render_target rts[] */ } __attribute__((packed)); #endif /* __PANFROST_JOB_H__ */