#include <stdint.h>
#include <stdbool.h>
-#include <panfrost-misc.h>
+#include <inttypes.h>
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+typedef uint64_t mali_ptr;
enum mali_job_type {
JOB_NOT_STARTED = 0,
/* Flags apply to unknown2_3? */
#define MALI_HAS_MSAA (1 << 0)
+
+/* Execute fragment shader per-sample if set (e.g. to implement gl_SampleID
+ * reads) */
+#define MALI_PER_SAMPLE (1 << 2)
#define MALI_CAN_DISCARD (1 << 5)
/* Applies on SFBD systems, specifying that programmable blending is in use */
#define MALI_DEPTH_WRITEMASK (1 << 11)
+#define MALI_DEPTH_CLIP_NEAR (1 << 12)
+#define MALI_DEPTH_CLIP_FAR (1 << 13)
+
/* 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_ALPHA_TO_COVERAGE (1 << 1)
#define MALI_NO_DITHER (1 << 9)
#define MALI_DEPTH_RANGE_A (1 << 12)
* for Bifrost framebuffer output.
*/
#define MALI_FORMAT_SPECIAL2 (7 << 5)
+#define MALI_EXTRACT_TYPE(fmt) ((fmt) & 0xe0)
/* 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)
+#define MALI_EXTRACT_CHANNELS(fmt) ((((fmt) >> 3) & 3) + 1)
/* 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
* MALI_FORMAT_UNORM, it means a 32-bit float.
*/
#define MALI_CHANNEL_FLOAT 7
+#define MALI_EXTRACT_BITS(fmt) (fmt & 0x7)
enum mali_format {
+ /* Not all formats are in fact available, need to query dynamically to
+ * check. Factory settings for Juno enables only ETC2 and ASTC, no
+ * DXT/RGTC formats.
+ * */
+
+ /* 0x0 invalid */
MALI_ETC2_RGB8 = MALI_FORMAT_COMPRESSED | 0x1,
MALI_ETC2_R11_UNORM = MALI_FORMAT_COMPRESSED | 0x2,
MALI_ETC2_RGBA8 = MALI_FORMAT_COMPRESSED | 0x3,
MALI_ETC2_RG11_UNORM = MALI_FORMAT_COMPRESSED | 0x4,
- MALI_ETC2_R11_SNORM = MALI_FORMAT_COMPRESSED | 0x11,
- MALI_ETC2_RG11_SNORM = MALI_FORMAT_COMPRESSED | 0x12,
+ /* 0x5 reserved */
+ MALI_NXR = MALI_FORMAT_COMPRESSED | 0x6, /* Nokia eXtended Range */
+ MALI_BC1_UNORM = MALI_FORMAT_COMPRESSED | 0x7, /* DXT1 */
+ MALI_BC2_UNORM = MALI_FORMAT_COMPRESSED | 0x8, /* DXT3 */
+ MALI_BC3_UNORM = MALI_FORMAT_COMPRESSED | 0x9, /* DXT5 */
+ MALI_BC4_UNORM = MALI_FORMAT_COMPRESSED | 0xA, /* RGTC1_UNORM */
+ MALI_BC4_SNORM = MALI_FORMAT_COMPRESSED | 0xB, /* RGTC1_SNORM */
+ MALI_BC5_UNORM = MALI_FORMAT_COMPRESSED | 0xC, /* RGTC2_UNORM */
+ MALI_BC5_SNORM = MALI_FORMAT_COMPRESSED | 0xD, /* RGTC2_SNORM */
+ MALI_BC6H_UF16 = MALI_FORMAT_COMPRESSED | 0xE,
+ MALI_BC6H_SF16 = MALI_FORMAT_COMPRESSED | 0xF,
+ MALI_BC7_UNORM = MALI_FORMAT_COMPRESSED | 0x10,
+ MALI_ETC2_R11_SNORM = MALI_FORMAT_COMPRESSED | 0x11, /* EAC_SNORM */
+ MALI_ETC2_RG11_SNORM = MALI_FORMAT_COMPRESSED | 0x12, /* EAC_SNORM */
MALI_ETC2_RGB8A1 = MALI_FORMAT_COMPRESSED | 0x13,
- MALI_ASTC_SRGB_SUPP = MALI_FORMAT_COMPRESSED | 0x16,
- MALI_ASTC_HDR_SUPP = MALI_FORMAT_COMPRESSED | 0x17,
+ MALI_ASTC_3D_LDR = MALI_FORMAT_COMPRESSED | 0x14,
+ MALI_ASTC_3D_HDR = MALI_FORMAT_COMPRESSED | 0x15,
+ MALI_ASTC_2D_LDR = MALI_FORMAT_COMPRESSED | 0x16,
+ MALI_ASTC_2D_HDR = MALI_FORMAT_COMPRESSED | 0x17,
MALI_RGB565 = MALI_FORMAT_SPECIAL | 0x0,
MALI_RGB5_X1_UNORM = MALI_FORMAT_SPECIAL | 0x1,
MALI_RGB332_UNORM = MALI_FORMAT_SPECIAL | 0xb,
MALI_RGB233_UNORM = MALI_FORMAT_SPECIAL | 0xc,
- MALI_Z32_UNORM = MALI_FORMAT_SPECIAL | 0xd,
+ MALI_Z24X8_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,
};
-/* 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 midgard1.flags_lo */
/* Should be set when the fragment shader updates the depth value. */
#define MALI_WRITES_Z (1 << 4)
-/* Should the hardware perform early-Z testing? Normally should be set
- * for performance reasons. Clear if you use: discard,
- * alpha-to-coverage... * It's also possible this disables
- * forward-pixel kill; we're not quite sure which bit is which yet.
- * TODO: How does this interact with blending?*/
+/* Should the hardware perform early-Z testing? Set if the shader does not use
+ * discard, alpha-to-coverage, shader depth writes, and if the shader has no
+ * side effects (writes to global memory or images) unless early-z testing is
+ * forced in the shader.
+ */
#define MALI_EARLY_Z (1 << 6)
* it might read depth/stencil in particular, also set MALI_READS_ZS */
#define MALI_READS_ZS (1 << 8)
-#define MALI_READS_TILEBUFFER (1 << 12)
+
+/* The shader might write to global memory (via OpenCL, SSBOs, or images).
+ * Reading is okay, as are ordinary writes to the tilebuffer/varyings. Setting
+ * incurs a performance penalty. On a fragment shader, this bit implies there
+ * are side effects, hence it interacts with early-z. */
+#define MALI_WRITES_GLOBAL (1 << 9)
+
+#define MALI_READS_TILEBUFFER (1 << 10)
/* Applies to midgard1.flags_hi */
/* Should be set when the fragment shader updates the stencil value. */
#define MALI_WRITES_S (1 << 2)
+/* Mode to suppress generation of Infinity and NaN values by clamping inf
+ * (-inf) to MAX_FLOAT (-MIN_FLOAT) and flushing NaN to 0.0
+ *
+ * Compare suppress_inf/suppress_nan flags on the Bifrost clause header for the
+ * same functionality.
+ *
+ * This is not conformant on GLES3 or OpenCL, but is optional on GLES2, where
+ * it works around app bugs (e.g. in glmark2-es2 -bterrain with FP16).
+ */
+#define MALI_SUPPRESS_INF_NAN (1 << 3)
+
+/* Flags for bifrost1.unk1 */
+
+/* Shader uses less than 32 registers, partitioned as [R0, R15] U [R48, R63],
+ * allowing for full thread count. If clear, the full [R0, R63] register set is
+ * available at half thread count */
+#define MALI_BIFROST_FULL_THREAD (1 << 9)
+
+/* Enable early-z testing (presumably). This flag may not be set if the shader:
+ *
+ * - Uses blending
+ * - Uses discard
+ * - Writes gl_FragDepth
+ *
+ * This differs from Midgard which sets the MALI_EARLY_Z flag even with
+ * blending, although I've begun to suspect that flag does not in fact enable
+ * EARLY_Z alone. */
+#define MALI_BIFROST_EARLY_Z (1 << 15)
+
+/* First clause type is ATEST */
+#define MALI_BIFROST_FIRST_ATEST (1 << 26)
+
/* The raw Midgard blend payload can either be an equation or a shader
* address, depending on the context */
u32 unknown2_2;
- u16 alpha_coverage;
+ /* Generated from SAMPLE_COVERAGE_VALUE and SAMPLE_COVERAGE_INVERT. See
+ * 13.8.3 ("Multisample Fragment Operations") in the OpenGL ES 3.2
+ * specification. Only matters when multisampling is enabled. */
+ u16 coverage_mask;
+
u16 unknown2_3;
u8 stencil_mask_front;
} __attribute__((packed));
struct bifrost_tiler_meta {
- u64 zero0;
+ u32 tiler_heap_next_start; /* To be written by the GPU */
+ u32 used_hierarchy_mask; /* To be written by the GPU */
u16 hierarchy_mask; /* Five values observed: 0xa, 0x14, 0x28, 0x50, 0xa0 */
u16 flags;
u16 width;
u16 height;
- u64 zero1;
+ u64 zero0;
mali_ptr tiler_heap_meta;
/* TODO what is this used for? */
u64 zeros[20];
struct bifrost_texture_descriptor {
unsigned format_unk : 4; /* 2 */
enum mali_texture_type type : 2;
- unsigned format_unk2 : 16; /* 0 */
+ unsigned zero : 4;
+ unsigned format_swizzle : 12;
enum mali_format format : 8;
unsigned srgb : 1;
unsigned format_unk3 : 1; /* 0 */
struct bifrost_sampler_descriptor {
uint8_t unk1;
- enum mali_wrap_mode wrap_s : 4;
- enum mali_wrap_mode wrap_t : 4;
enum mali_wrap_mode wrap_r : 4;
+ enum mali_wrap_mode wrap_t : 4;
+ enum mali_wrap_mode wrap_s : 4;
uint8_t unk8 : 4;
- uint8_t unk2 : 3;
- uint8_t min_filter : 1;
+ uint8_t unk2 : 1;
uint8_t norm_coords : 1;
+ uint8_t unk3 : 1;
+ uint8_t min_filter : 1;
uint8_t zero1 : 1;
- uint8_t mip_filter : 1;
uint8_t mag_filter : 1;
+ uint8_t mip_filter : 1;
int16_t min_lod;
int16_t max_lod;
/* More below this, maybe */
} __attribute__((packed));
-/* Format bits for the render target flags */
-#define MALI_MFBD_FORMAT_MSAA (1 << 1)
-#define MALI_MFBD_FORMAT_SRGB (1 << 2)
+/* SINGLE to disable multisampling, AVERAGE for
+ * EXT_multisampled_render_to_texture operation where multiple tilebuffer
+ * samples are implicitly resolved before writeout, MULTIPLE to write multiple
+ * samples inline, and LAYERED for ES3-style multisampling with each sample in
+ * a different buffer.
+ */
+
+enum mali_msaa_mode {
+ MALI_MSAA_SINGLE = 0,
+ MALI_MSAA_AVERAGE = 1,
+ MALI_MSAA_MULTIPLE = 2,
+ MALI_MSAA_LAYERED = 3,
+};
+
+#define MALI_MFBD_FORMAT_SRGB (1 << 0)
struct mali_rt_format {
unsigned unk1 : 32;
unsigned nr_channels : 2; /* MALI_POSITIVE */
- unsigned unk3 : 5;
+ unsigned unk3 : 4;
+ unsigned unk4 : 1;
enum mali_block_format block : 2;
- unsigned flags : 4;
+ enum mali_msaa_mode msaa : 2;
+ unsigned flags : 2;
unsigned swizzle : 12;
unsigned no_preload : 1;
} __attribute__((packed));
+/* Flags for afbc.flags and ds_afbc.flags */
+
+#define MALI_AFBC_FLAGS 0x10009
+
+/* Lossless RGB and RGBA colorspace transform */
+#define MALI_AFBC_YTR (1 << 17)
+
struct mali_render_target {
struct mali_rt_format format;
mali_ptr metadata;
u32 stride; // stride in units of tiles
- u32 unk; // = 0x20000
+ u32 flags; // = 0x20000
} afbc;
mali_ptr framebuffer;
u32 zero2 : 4;
- u32 framebuffer_stride : 28; // in units of bytes
- u32 zero3;
+ u32 framebuffer_stride : 28; // in units of bytes, row to next
+ u32 layer_stride; /* For multisample rendering */
u32 clear_color_1; // RGBA8888 from glClear, actually used by hardware
u32 clear_color_2; // always equal, but unclear function?
*/
/* flags_hi */
-#define MALI_EXTRA_PRESENT (0x10)
+#define MALI_EXTRA_PRESENT (0x1)
/* flags_lo */
#define MALI_EXTRA_ZS (0x4)
unsigned flags_lo : 4;
enum mali_block_format zs_block : 2;
- unsigned flags_hi : 26;
+
+ /* Number of samples in Z/S attachment, MALI_POSITIVE. So zero for
+ * 1-sample (non-MSAA), 0x3 for MSAA 4x, etc */
+ unsigned zs_samples : 4;
+ unsigned flags_hi : 22;
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;
+ u32 flags;
mali_ptr depth_stencil;
mali_ptr depth;
u32 depth_stride_zero : 4;
u32 depth_stride : 28;
- u32 zero1;
+ u32 depth_layer_stride;
mali_ptr stencil;
u32 stencil_stride_zero : 4;
u32 stencil_stride : 28;
- u32 zero2;
+ u32 stencil_layer_stride;
} ds_linear;
};
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_1 : 3; // off-by-one (use MALI_POSITIVE)
+ u32 unk2 : 2; // = 0
u32 rt_count_2 : 3; // no off-by-one
u32 zero4 : 5;
/* 0x30 */
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