From 2779fd6a7c3548c8b83fb710d0e6554477f20dd9 Mon Sep 17 00:00:00 2001 From: Zack Buhman Date: Sun, 19 Oct 2025 15:33:12 -0500 Subject: [PATCH] drm: add shadertoy --- drm/shadertoy.c | 646 ++++++++++++++++++++++++++ drm/shadertoy.vs.asm | 2 + drm/shadertoy.vs.inc | 2 + shader_examples/mesa/shadertoy.fs.txt | 6 + shader_examples/mesa/shadertoy.vs.txt | 8 + 5 files changed, 664 insertions(+) create mode 100644 drm/shadertoy.c create mode 100644 drm/shadertoy.vs.asm create mode 100644 drm/shadertoy.vs.inc create mode 100644 shader_examples/mesa/shadertoy.fs.txt create mode 100644 shader_examples/mesa/shadertoy.vs.txt diff --git a/drm/shadertoy.c b/drm/shadertoy.c new file mode 100644 index 0000000..bebf4b5 --- /dev/null +++ b/drm/shadertoy.c @@ -0,0 +1,646 @@ +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include "3d_registers.h" +#include "3d_registers_undocumented.h" +#include "3d_registers_bits.h" +#include "command_processor.h" + +union u32_f32 { + uint32_t u32; + float f32; +}; + +static union u32_f32 ib[16384]; + +int indirect_buffer() +{ + int ix = 0; + + T0V(RB3D_DSTCACHE_CTLSTAT + , RB3D_DSTCACHE_CTLSTAT__DC_FLUSH(0x2) // Flush dirty 3D data + | RB3D_DSTCACHE_CTLSTAT__DC_FREE(0x2) // Free 3D tags + ); + + T0V(ZB_ZCACHE_CTLSTAT + , ZB_ZCACHE_CTLSTAT__ZC_FLUSH(1) + | ZB_ZCACHE_CTLSTAT__ZC_FREE(1) + ); + + T0V(WAIT_UNTIL, 0x00020000); + + T0V(GB_AA_CONFIG, 0x00000000); + + T0V(RB3D_AARESOLVE_CTL, 0x00000000); + + T0V(RB3D_CCTL + , RB3D_CCTL__INDEPENDENT_COLORFORMAT_ENABLE(1) + ); + + T0V(ZB_BW_CNTL, 0x00000000); + T0V(ZB_DEPTHCLEARVALUE, 0x00000000); + T0V(SC_HYPERZ_EN, 0x00000000); + T0V(GB_Z_PEQ_CONFIG, 0x00000000); + T0V(ZB_ZTOP + , ZB_ZTOP__ZTOP(1) + ); + T0V(FG_ALPHA_FUNC, 0x00000000); + T0V(ZB_CNTL, 0x00000000); + T0V(ZB_ZSTENCILCNTL, 0x00000000); + T0V(ZB_STENCILREFMASK, 0x00000000); + T0V(ZB_STENCILREFMASK_BF, 0x00000000); + + T0V(FG_ALPHA_VALUE, 0x00000000); + T0V(RB3D_ROPCNTL, 0x00000000); + T0V(RB3D_BLENDCNTL, 0x00000000); + T0V(RB3D_ABLENDCNTL, 0x00000000); + T0V(RB3D_COLOR_CHANNEL_MASK + , RB3D_COLOR_CHANNEL_MASK__BLUE_MASK(1) + | RB3D_COLOR_CHANNEL_MASK__GREEN_MASK(1) + | RB3D_COLOR_CHANNEL_MASK__RED_MASK(1) + | RB3D_COLOR_CHANNEL_MASK__ALPHA_MASK(1) + ); + T0V(RB3D_DITHER_CTL, 0x00000000); + T0V(RB3D_CONSTANT_COLOR_AR, 0x00000000); + T0V(RB3D_CONSTANT_COLOR_GB, 0x00000000); + + T0V(SC_CLIP_0_A, 0x00000000); + T0V(SC_CLIP_0_B, 0xffffffff); + T0V(SC_SCREENDOOR, 0x00ffffff); + + T0V(GB_SELECT, 0x00000000); + T0V(FG_FOG_BLEND, 0x00000000); + T0V(GA_OFFSET, 0x00000000); + T0V(SU_TEX_WRAP, 0x00000000); + T0Vf(SU_DEPTH_SCALE, 16777215.0f); + T0V(SU_DEPTH_OFFSET, 0x00000000); + T0V(SC_EDGERULE + , SC_EDGERULE__ER_TRI(5) // L-in,R-out,HT-in,HB-in + | SC_EDGERULE__ER_POINT(9) // L-out,R-in,HT-in,HB-out + | SC_EDGERULE__ER_LINE_LR(5) // L-in,R-out,HT-in,HB-out + | SC_EDGERULE__ER_LINE_RL(9) // L-out,R-in,HT-in,HB-out + | SC_EDGERULE__ER_LINE_TB(26) // T-in,B-out,VL-out,VR-in + | SC_EDGERULE__ER_LINE_BT(22) // T-out,B-in,VL-out,VR-in + ); + T0V(RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD + , RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD__BLUE(1) + | RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD__GREEN(1) + | RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD__RED(1) + | RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD__ALPHA(1) + ); + T0V(RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD + , RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD__BLUE(254) + | RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD__GREEN(254) + | RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD__RED(254) + | RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD__ALPHA(254) + ); + T0V(GA_COLOR_CONTROL_PS3, 0x00000000); + T0V(SU_TEX_WRAP_PS3, 0x00000000); + T0V(VAP_PVS_VTX_TIMEOUT_REG + , VAP_PVS_VTX_TIMEOUT_REG__CLK_COUNT(0xffff) + ); + T0Vf(VAP_GB_VERT_CLIP_ADJ, 1.0f); + T0Vf(VAP_GB_VERT_DISC_ADJ, 1.0f); + T0Vf(VAP_GB_HORZ_CLIP_ADJ, 1.0f); + T0Vf(VAP_GB_HORZ_DISC_ADJ, 1.0f); + T0V(VAP_PSC_SGN_NORM_CNTL + , VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_0(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_1(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_2(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_3(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_4(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_5(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_6(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_7(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_8(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_9(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_10(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_11(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_12(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_13(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_14(2) + | VAP_PSC_SGN_NORM_CNTL__SGN_NORM_METHOD_15(2) + ); + T0V(VAP_TEX_TO_COLOR_CNTL, 0x00000000); + + T0V(VAP_CNTL + , VAP_CNTL__PVS_NUM_SLOTS(10) + | VAP_CNTL__PVS_NUM_CNTLRS(5) + | VAP_CNTL__PVS_NUM_FPUS(5) + | VAP_CNTL__VAP_NO_RENDER(0) + | VAP_CNTL__VF_MAX_VTX_NUM(12) + | VAP_CNTL__DX_CLIP_SPACE_DEF(0) + | VAP_CNTL__TCL_STATE_OPTIMIZATION(1) + ); + T0V(VAP_PVS_FLOW_CNTL_OPC, 0x00000000); + + T0(VAP_PVS_FLOW_CNTL_ADDRS_LW_0, 31); + for (int i = 0; i < 32; i++) + ib[ix++].u32 = 0x00000000; + + T0(VAP_PVS_FLOW_CNTL_LOOP_INDEX_0, 15); + for (int i = 0; i < 16; i++) + ib[ix++].u32 = 0x00000000; + + T0V(VAP_PVS_VECTOR_INDX_REG, 0x00000600); + T0_ONE_REG(VAP_PVS_VECTOR_DATA_REG_128, 23); + for (int i = 0; i < 24; i++) + ib[ix++].u32 = 0x00000000; + + T0V(VAP_VTX_STATE_CNTL + , VAP_VTX_STATE_CNTL__COLOR_0_ASSEMBLY_CNTL(1) + | VAP_VTX_STATE_CNTL__COLOR_1_ASSEMBLY_CNTL(1) + | VAP_VTX_STATE_CNTL__COLOR_2_ASSEMBLY_CNTL(1) + | VAP_VTX_STATE_CNTL__COLOR_3_ASSEMBLY_CNTL(1) + | VAP_VTX_STATE_CNTL__COLOR_4_ASSEMBLY_CNTL(1) + | VAP_VTX_STATE_CNTL__COLOR_5_ASSEMBLY_CNTL(1) + | VAP_VTX_STATE_CNTL__COLOR_6_ASSEMBLY_CNTL(1) + | VAP_VTX_STATE_CNTL__COLOR_7_ASSEMBLY_CNTL(1) + | VAP_VTX_STATE_CNTL__UPDATE_USER_COLOR_0_ENA(0) + ); + + T0V(GB_ENABLE, 0x00000000); + T0V(VAP_CNTL_STATUS, 0x00000000); + T0V(VAP_CLIP_CNTL + , VAP_CLIP_CNTL__PS_UCP_MODE(3) + ); + T0V(GA_POINT_SIZE + , GA_POINT_SIZE__HEIGHT(6) + | GA_POINT_SIZE__WIDTH(6) + ); + T0V(GA_POINT_MINMAX + , GA_POINT_MINMAX__MIN_SIZE(6) + | GA_POINT_MINMAX__MAX_SIZE(6) + ); + T0V(GA_LINE_CNTL + , GA_LINE_CNTL__WIDTH(6) + | GA_LINE_CNTL__END_TYPE(2) + | GA_LINE_CNTL__SORT(0) + ); + T0V(SU_POLY_OFFSET_ENABLE, 0x00000000); + T0V(SU_CULL_MODE, 0x00000000); + T0V(GA_LINE_STIPPLE_CONFIG, 0x00000000); + T0V(GA_LINE_STIPPLE_VALUE, 0x00000000); + T0V(GA_POLY_MODE, 0x00000000); + T0V(GA_ROUND_MODE + , GA_ROUND_MODE__GEOMETRY_ROUND(1) + | GA_ROUND_MODE__COLOR_ROUND(0) + | GA_ROUND_MODE__RGB_CLAMP(1) + | GA_ROUND_MODE__ALPHA_CLAMP(1) + | GA_ROUND_MODE__GEOMETRY_MASK(0) + ); + T0V(SC_CLIP_RULE + , SC_CLIP_RULE__CLIP_RULE(0xffff)); + T0Vf(GA_POINT_S0, 0.0f); + T0Vf(GA_POINT_T0, 1.0f); + T0Vf(GA_POINT_S1, 1.0f); + T0Vf(GA_POINT_T1, 0.0f); + T0V(US_OUT_FMT_0 + , US_OUT_FMT__OUT_FMT(0) // C4_8 + | US_OUT_FMT__C0_SEL(3) // Blue + | US_OUT_FMT__C1_SEL(2) // Green + | US_OUT_FMT__C2_SEL(1) // Red + | US_OUT_FMT__C3_SEL(0) // Alpha + | US_OUT_FMT__OUT_SIGN(0) + ); + T0V(US_OUT_FMT_1 + , US_OUT_FMT__OUT_FMT(15) // render target is not used + ); + T0V(US_OUT_FMT_2 + , US_OUT_FMT__OUT_FMT(15) // render target is not used + ); + T0V(US_OUT_FMT_2 + , US_OUT_FMT__OUT_FMT(15) // render target is not used + ); + T0V(GB_MSPOS0 + , GB_MSPOS0__MS_X0(6) + | GB_MSPOS0__MS_Y0(6) + | GB_MSPOS0__MS_X1(6) + | GB_MSPOS0__MS_Y1(6) + | GB_MSPOS0__MS_X2(6) + | GB_MSPOS0__MS_Y2(6) + | GB_MSPOS0__MSBD0_Y(6) + | GB_MSPOS0__MSBD0_X(6) + ); + T0V(GB_MSPOS1 + , GB_MSPOS1__MS_X3(6) + | GB_MSPOS1__MS_Y3(6) + | GB_MSPOS1__MS_X4(6) + | GB_MSPOS1__MS_Y4(6) + | GB_MSPOS1__MS_X5(6) + | GB_MSPOS1__MS_Y5(6) + | GB_MSPOS1__MSBD1(6) + ); + T0V(US_CONFIG + , US_CONFIG__ZERO_TIMES_ANYTHING_EQUALS_ZERO(1) + ); + T0V(US_PIXSIZE + , US_PIXSIZE__PIX_SIZE(1) + ); + T0V(US_FC_CTRL, 0); + + T0V(FG_DEPTH_SRC, 0x00000000); + T0V(US_W_FMT, 0x00000000); + T0V(VAP_PVS_CONST_CNTL, 0x00000000); + T0V(TX_INVALTAGS, 0x00000000); + T0V(TX_ENABLE, 0x00000000); + T0V(VAP_INDEX_OFFSET, 0x00000000); + T0V(GA_COLOR_CONTROL + , GA_COLOR_CONTROL__RGB0_SHADING(2) + | GA_COLOR_CONTROL__ALPHA0_SHADING(2) + | GA_COLOR_CONTROL__RGB1_SHADING(2) + | GA_COLOR_CONTROL__ALPHA1_SHADING(2) + | GA_COLOR_CONTROL__RGB2_SHADING(2) + | GA_COLOR_CONTROL__ALPHA2_SHADING(2) + | GA_COLOR_CONTROL__RGB3_SHADING(2) + | GA_COLOR_CONTROL__ALPHA3_SHADING(2) + | GA_COLOR_CONTROL__PROVOKING_VERTEX(3) + ); + + ////////////////////////////////////////////////////////////////////////////// + // CB + ////////////////////////////////////////////////////////////////////////////// + + T0V(RB3D_COLOROFFSET0 + , 0x00000000 // value replaced by kernel from relocs + ); + T3(_NOP, 0); + ib[ix++].u32 = 0 * 4; // index into relocs array + + T0V(RB3D_COLORPITCH0 + , RB3D_COLORPITCH__COLORPITCH(1600 >> 1) + | RB3D_COLORPITCH__COLORFORMAT(6) // ARGB8888 + ); + // The COLORPITCH NOP is ignored/not applied due to + // RADEON_CS_KEEP_TILING_FLAGS, but is still required. + T3(_NOP, 0); + ib[ix++].u32 = 0 * 4; // index into relocs array + + ////////////////////////////////////////////////////////////////////////////// + // SC + ////////////////////////////////////////////////////////////////////////////// + + T0V(SC_SCISSOR0 + , SC_SCISSOR0__XS0(0) + | SC_SCISSOR0__YS0(0) + ); + T0V(SC_SCISSOR1 + , SC_SCISSOR1__XS1(1600 - 1) + | SC_SCISSOR1__YS1(1200 - 1) + ); + + ////////////////////////////////////////////////////////////////////////////// + // VAP + ////////////////////////////////////////////////////////////////////////////// + + T0Vf(VAP_VPORT_XSCALE, 800.0f); + T0Vf(VAP_VPORT_XOFFSET, 800.0f); + T0Vf(VAP_VPORT_YSCALE, -600.0f); + T0Vf(VAP_VPORT_YOFFSET, 600.0f); + T0Vf(VAP_VPORT_ZSCALE, 0.5f); + T0Vf(VAP_VPORT_ZOFFSET, 0.5f); + + T0V(VAP_VTE_CNTL + , VAP_VTE_CNTL__VPORT_X_SCALE_ENA(1) + | VAP_VTE_CNTL__VPORT_X_OFFSET_ENA(1) + | VAP_VTE_CNTL__VPORT_Y_SCALE_ENA(1) + | VAP_VTE_CNTL__VPORT_Y_OFFSET_ENA(1) + | VAP_VTE_CNTL__VPORT_Z_SCALE_ENA(1) + | VAP_VTE_CNTL__VPORT_Z_OFFSET_ENA(1) + | VAP_VTE_CNTL__VTX_XY_FMT(0) + | VAP_VTE_CNTL__VTX_Z_FMT(0) + | VAP_VTE_CNTL__VTX_W0_FMT(1) + | VAP_VTE_CNTL__SERIAL_PROC_ENA(0) + ); + + T0V(VAP_VF_MAX_VTX_INDX + , VAP_VF_MAX_VTX_INDX__MAX_INDX(5) + ); + T0V(VAP_VF_MIN_VTX_INDX + , VAP_VF_MIN_VTX_INDX__MIN_INDX(0) + ); + T0V(VAP_VTX_SIZE + , VAP_VTX_SIZE__DWORDS_PER_VTX(3) + ); + + T0V(VAP_PROG_STREAM_CNTL_0 + , VAP_PROG_STREAM_CNTL__DATA_TYPE_0__FLOAT_3 + | VAP_PROG_STREAM_CNTL__SKIP_DWORDS_0(0) + | VAP_PROG_STREAM_CNTL__DST_VEC_LOC_0(0) + | VAP_PROG_STREAM_CNTL__LAST_VEC_0(1) + ); + T0V(VAP_PROG_STREAM_CNTL_EXT_0 + , VAP_PROG_STREAM_CNTL_EXT__SWIZZLE_SELECT_X_0(0) + | VAP_PROG_STREAM_CNTL_EXT__SWIZZLE_SELECT_Y_0(1) + | VAP_PROG_STREAM_CNTL_EXT__SWIZZLE_SELECT_Z_0(2) + | VAP_PROG_STREAM_CNTL_EXT__SWIZZLE_SELECT_W_0(5) + | VAP_PROG_STREAM_CNTL_EXT__WRITE_ENA_0(15) + ); + + T0V(VAP_VSM_VTX_ASSM, 0x00000005); // undocumented + + T0V(VAP_OUT_VTX_FMT_0 + , VAP_OUT_VTX_FMT_0__VTX_POS_PRESENT(1) + | VAP_OUT_VTX_FMT_0__VTX_COLOR_0_PRESENT(1) + ); + T0V(VAP_OUT_VTX_FMT_1 + , 0 + ); + + ////////////////////////////////////////////////////////////////////////////// + // VAP_PVS + ////////////////////////////////////////////////////////////////////////////// + + T0V(VAP_PVS_CODE_CNTL_0 + , VAP_PVS_CODE_CNTL_0__PVS_FIRST_INST(0) + | VAP_PVS_CODE_CNTL_0__PVS_XYZW_VALID_INST(1) + | VAP_PVS_CODE_CNTL_0__PVS_LAST_INST(1) + ); + T0V(VAP_PVS_CODE_CNTL_1 + , VAP_PVS_CODE_CNTL_1__PVS_LAST_VTX_SRC_INST(1) + ); + + T0V(VAP_PVS_VECTOR_INDX_REG + , VAP_PVS_VECTOR_INDX_REG__OCTWORD_OFFSET(0) + ); + + const uint32_t vertex_shader[] = { + #include "shadertoy.vs.inc" + }; + const int vertex_shader_length = (sizeof (vertex_shader)) / (sizeof (vertex_shader[0])); + assert(vertex_shader_length % 4 == 0); + printf("vs length %d\n", vertex_shader_length); + + T0_ONE_REG(VAP_PVS_VECTOR_DATA_REG_128, vertex_shader_length - 1); + for (int i = 0; i < vertex_shader_length; i++) { + ib[ix++].u32 = vertex_shader[i]; + } + + T0V(VAP_PVS_STATE_FLUSH_REG, 0x00000000); + + ////////////////////////////////////////////////////////////////////////////// + // RS + ////////////////////////////////////////////////////////////////////////////// + + T0V(RS_IP_0, 0); + T0V(RS_COUNT + , RS_COUNT__IT_COUNT(0) + | RS_COUNT__IC_COUNT(1) + | RS_COUNT__W_ADDR(0) + | RS_COUNT__HIRES_EN(1) + ); + T0V(RS_INST_0 + , RS_INST__TEX_ID(0) + | RS_INST__TEX_CN(0) + | RS_INST__TEX_ADDR(0) + | RS_INST__COL_ID(0) + | RS_INST__COL_CN(1) + | RS_INST__COL_ADDR(0) + | RS_INST__TEX_ADJ(0) + | RS_INST__W_CN(0) + ); + + T0V(RS_INST_COUNT, 0x00000000); + + + ////////////////////////////////////////////////////////////////////////////// + // GA_US + ////////////////////////////////////////////////////////////////////////////// + + T0V(US_CODE_RANGE + , US_CODE_RANGE__CODE_ADDR(0) + | US_CODE_RANGE__CODE_SIZE(0) + ); + T0V(US_CODE_OFFSET + , US_CODE_OFFSET__OFFSET_ADDR(0) + ); + T0V(US_CODE_ADDR + , US_CODE_ADDR__START_ADDR(0) + | US_CODE_ADDR__END_ADDR(0) + ); + + const uint32_t fragment_shader[] = { + #include "../shader_examples/mesa/shadertoy.fs.txt" + }; + const int fragment_shader_length = (sizeof (fragment_shader)) / (sizeof (fragment_shader[0])); + assert(fragment_shader_length % 6 == 0); + printf("fs length %d\n", fragment_shader_length); + + T0V(GA_US_VECTOR_INDEX, 0x00000000); + T0_ONE_REG(GA_US_VECTOR_DATA, fragment_shader_length - 1); + for (int i = 0; i < fragment_shader_length; i++) { + ib[ix++].u32 = fragment_shader[i]; + } + + ////////////////////////////////////////////////////////////////////////////// + // 3D_DRAW + ////////////////////////////////////////////////////////////////////////////// + + const float vertices[] = { + // position + -1.0f, -1.0f, 0.0f, + 1.0f, -1.0f, 0.0f, + 1.0f, 1.0f, 0.0f, + + -1.0f, -1.0f, 0.0f, + 1.0f, 1.0f, 0.0f, + -1.0f, 1.0f, 0.0f + }; + const int vertices_length = (sizeof (vertices)) / (sizeof (vertices[0])); + printf("vtx length %d\n", vertices_length); + T3(_3D_DRAW_IMMD_2, (1 + vertices_length) - 1); + ib[ix++].u32 + = VAP_VF_CNTL__PRIM_TYPE(4) + | VAP_VF_CNTL__PRIM_WALK(3) + | VAP_VF_CNTL__INDEX_SIZE(0) + | VAP_VF_CNTL__VTX_REUSE_DIS(0) + | VAP_VF_CNTL__DUAL_INDEX_MODE(0) + | VAP_VF_CNTL__USE_ALT_NUM_VERTS(0) + | VAP_VF_CNTL__NUM_VERTICES(6) + ; + for (int i = 0; i < vertices_length; i++) { + ib[ix++].f32 = vertices[i]; + } + + ////////////////////////////////////////////////////////////////////////////// + // padding + ////////////////////////////////////////////////////////////////////////////// + + while ((ix % 8) != 0) { + ib[ix++].u32 = 0x80000000; + } + + return ix; +} + +int main() +{ + int ret; + int fd = open("/dev/dri/card0", O_RDWR | O_CLOEXEC); + + const int colorbuffer_size = 1600 * 1200 * 4; + int colorbuffer_handle; + void * colorbuffer_ptr; + int flush_handle; + + // colorbuffer + { + struct drm_radeon_gem_create args = { + .size = colorbuffer_size, + .alignment = 4096, + .handle = 0, + .initial_domain = 4, // RADEON_GEM_DOMAIN_VRAM + .flags = 4 + }; + + ret = drmCommandWriteRead(fd, DRM_RADEON_GEM_CREATE, &args, (sizeof (struct drm_radeon_gem_create))); + if (ret != 0) { + perror("drmCommandWriteRead(DRM_RADEON_GEM_CREATE)"); + } + assert(args.handle != 0); + + colorbuffer_handle = args.handle; + } + + { + struct drm_radeon_gem_mmap mmap_args = { + .handle = colorbuffer_handle, + .offset = 0, + .size = colorbuffer_size, + }; + ret = drmCommandWriteRead(fd, DRM_RADEON_GEM_MMAP, &mmap_args, (sizeof (struct drm_radeon_gem_mmap))); + if (ret != 0) { + perror("drmCommandWriteRead(DRM_RADEON_GEM_MMAP)"); + } + + colorbuffer_ptr = mmap(0, mmap_args.size, PROT_READ|PROT_WRITE, MAP_SHARED, + fd, mmap_args.addr_ptr); + } + + { // clear colorbuffer + for (int i = 0; i < colorbuffer_size / 4; i++) { + ((uint32_t*)colorbuffer_ptr)[i] = 0; + } + asm volatile ("" ::: "memory"); + } + + // flush + { + struct drm_radeon_gem_create args = { + .size = 4096, + .alignment = 4096, + .handle = 0, + .initial_domain = 2, // GTT + .flags = 0 + }; + + ret = drmCommandWriteRead(fd, DRM_RADEON_GEM_CREATE, + &args, (sizeof (args))); + if (ret != 0) { + perror("drmCommandWriteRead(DRM_RADEON_GEM_CREATE)"); + } + assert(args.handle != 0); + flush_handle = args.handle; + } + + + fprintf(stderr, "colorbuffer handle %d\n", colorbuffer_handle); + + struct drm_radeon_cs_reloc relocs[] = { + { + .handle = colorbuffer_handle, + .read_domains = 4, // RADEON_GEM_DOMAIN_VRAM + .write_domain = 4, // RADEON_GEM_DOMAIN_VRAM + .flags = 8, + }, + { + .handle = flush_handle, + .read_domains = 2, // RADEON_GEM_DOMAIN_GTT + .write_domain = 2, // RADEON_GEM_DOMAIN_GTT + .flags = 0, + } + }; + + uint32_t flags[2] = { + 5, // RADEON_CS_KEEP_TILING_FLAGS | RADEON_CS_END_OF_FRAME + 0, // RADEON_CS_RING_GFX + }; + + int ib_dwords = indirect_buffer(); + //int ib_dwords = (sizeof (ib2)) / (sizeof (ib2[0])); + + struct drm_radeon_cs_chunk chunks[3] = { + { + .chunk_id = RADEON_CHUNK_ID_IB, + .length_dw = ib_dwords, + .chunk_data = (uint64_t)(uintptr_t)ib, + }, + { + .chunk_id = RADEON_CHUNK_ID_RELOCS, + .length_dw = (sizeof (relocs)) / (sizeof (uint32_t)), + .chunk_data = (uint64_t)(uintptr_t)relocs, + }, + { + .chunk_id = RADEON_CHUNK_ID_FLAGS, + .length_dw = (sizeof (flags)) / (sizeof (uint32_t)), + .chunk_data = (uint64_t)(uintptr_t)&flags, + }, + }; + + uint64_t chunks_array[3] = { + (uint64_t)(uintptr_t)&chunks[0], + (uint64_t)(uintptr_t)&chunks[1], + (uint64_t)(uintptr_t)&chunks[2], + }; + + struct drm_radeon_cs cs = { + .num_chunks = 3, + .cs_id = 0, + .chunks = (uint64_t)(uintptr_t)chunks_array, + .gart_limit = 0, + .vram_limit = 0, + }; + + ret = drmCommandWriteRead(fd, DRM_RADEON_CS, &cs, (sizeof (struct drm_radeon_cs))); + if (ret != 0) { + perror("drmCommandWriteRead(DRM_RADEON_CS)"); + } + + struct drm_radeon_gem_wait_idle args = { + .handle = flush_handle + }; + while (drmCommandWrite(fd, DRM_RADEON_GEM_WAIT_IDLE, &args, (sizeof (struct drm_radeon_gem_wait_idle))) == -EBUSY); + + int out_fd = open("colorbuffer.data", O_RDWR|O_CREAT); + assert(out_fd >= 0); + ssize_t write_length = write(out_fd, colorbuffer_ptr, colorbuffer_size); + assert(write_length == colorbuffer_size); + close(out_fd); + + int mm_fd = open("/sys/kernel/debug/radeon_vram_mm", O_RDONLY); + assert(mm_fd >= 0); + char buf[4096]; + while (true) { + ssize_t read_length = read(mm_fd, buf, 4096); + assert(read_length >= 0); + write(STDOUT_FILENO, buf, read_length); + if (read_length < 4096) { + break; + } + } + close(mm_fd); + + munmap(colorbuffer_ptr, colorbuffer_size); + + close(fd); +} diff --git a/drm/shadertoy.vs.asm b/drm/shadertoy.vs.asm new file mode 100644 index 0000000..f5380d0 --- /dev/null +++ b/drm/shadertoy.vs.asm @@ -0,0 +1,2 @@ +out[1].xy = VE_ADD input[0].xy__ input[0].0000 input[0].0000 +out[0].xyzw = VE_ADD input[0].xyz1 input[0].0000 input[0].0000 diff --git a/drm/shadertoy.vs.inc b/drm/shadertoy.vs.inc new file mode 100644 index 0000000..10fa32e --- /dev/null +++ b/drm/shadertoy.vs.inc @@ -0,0 +1,2 @@ +0x00302203, 0x01f90001, 0x01248001, 0x01248001, +0x00f00203, 0x01510001, 0x01248001, 0x01248001, diff --git a/shader_examples/mesa/shadertoy.fs.txt b/shader_examples/mesa/shadertoy.fs.txt new file mode 100644 index 0000000..10f43df --- /dev/null +++ b/shader_examples/mesa/shadertoy.fs.txt @@ -0,0 +1,6 @@ +0x00078005, +0x08020000, +0x08020080, +0x1c840420, +0x1cc18003, +0x00000005, diff --git a/shader_examples/mesa/shadertoy.vs.txt b/shader_examples/mesa/shadertoy.vs.txt new file mode 100644 index 0000000..c972ef1 --- /dev/null +++ b/shader_examples/mesa/shadertoy.vs.txt @@ -0,0 +1,8 @@ +0x01302203, +0x01f90001, +0x01248001, +0x01248001, +0x00f00203, +0x01510001, +0x01248001, +0x01248001,