src/intel/vulkan/genX_gpu_memcpy.c

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "anv_private.h"
  25
  26 #include "genxml/gen_macros.h"
  27 #include "genxml/genX_pack.h"
  28
  29 #include "common/gen_l3_config.h"
  30
  31 /**
  32  * This file implements some lightweight memcpy/memset operations on the GPU
  33  * using a vertex buffer and streamout.
  34  */
  35
  36 /**
  37  * Returns the greatest common divisor of a and b that is a power of two.
  38  */
  39 static uint64_t
  40 gcd_pow2_u64(uint64_t a, uint64_t b)
  41 {
  42    assert(a > 0 || b > 0);
  43
  44    unsigned a_log2 = ffsll(a) - 1;
  45    unsigned b_log2 = ffsll(b) - 1;
  46
  47    /* If either a or b is 0, then a_log2 or b_log2 will be UINT_MAX in which
  48     * case, the MIN2() will take the other one.  If both are 0 then we will
  49     * hit the assert above.
  50     */
  51    return 1 << MIN2(a_log2, b_log2);
  52 }
  53
  54 void
  55 genX(cmd_buffer_so_memcpy)(struct anv_cmd_buffer *cmd_buffer,
  56                            struct anv_address dst, struct anv_address src,
  57                            uint32_t size)
  58 {
  59    if (size == 0)
  60       return;
  61
  62    /* The maximum copy block size is 4 32-bit components at a time. */
  63    assert(size % 4 == 0);
  64    unsigned bs = gcd_pow2_u64(16, size);
  65
  66    enum isl_format format;
  67    switch (bs) {
  68    case 4:  format = ISL_FORMAT_R32_UINT;          break;
  69    case 8:  format = ISL_FORMAT_R32G32_UINT;       break;
  70    case 16: format = ISL_FORMAT_R32G32B32A32_UINT; break;
  71    default:
  72       unreachable("Invalid size");
  73    }
  74
  75    if (!cmd_buffer->state.current_l3_config) {
  76       const struct gen_l3_config *cfg =
  77          gen_get_default_l3_config(&cmd_buffer->device->info);
  78       genX(cmd_buffer_config_l3)(cmd_buffer, cfg);
  79    }
  80
  81    genX(cmd_buffer_apply_pipe_flushes)(cmd_buffer);
  82
  83    genX(flush_pipeline_select_3d)(cmd_buffer);
  84
  85    uint32_t *dw;
  86    dw = anv_batch_emitn(&cmd_buffer->batch, 5, GENX(3DSTATE_VERTEX_BUFFERS));
  87    GENX(VERTEX_BUFFER_STATE_pack)(&cmd_buffer->batch, dw + 1,
  88       &(struct GENX(VERTEX_BUFFER_STATE)) {
  89          .VertexBufferIndex = 32, /* Reserved for this */
  90          .AddressModifyEnable = true,
  91          .BufferStartingAddress = src,
  92          .BufferPitch = bs,
  93          .MOCS = anv_mocs_for_bo(cmd_buffer->device, src.bo),
  94 #if (GEN_GEN >= 8)
  95          .BufferSize = size,
  96 #else
  97          .EndAddress = anv_address_add(src, size - 1),
  98 #endif
  99       });
 100
 101    dw = anv_batch_emitn(&cmd_buffer->batch, 3, GENX(3DSTATE_VERTEX_ELEMENTS));
 102    GENX(VERTEX_ELEMENT_STATE_pack)(&cmd_buffer->batch, dw + 1,
 103       &(struct GENX(VERTEX_ELEMENT_STATE)) {
 104          .VertexBufferIndex = 32,
 105          .Valid = true,
 106          .SourceElementFormat = format,
 107          .SourceElementOffset = 0,
 108          .Component0Control = (bs >= 4) ? VFCOMP_STORE_SRC : VFCOMP_STORE_0,
 109          .Component1Control = (bs >= 8) ? VFCOMP_STORE_SRC : VFCOMP_STORE_0,
 110          .Component2Control = (bs >= 12) ? VFCOMP_STORE_SRC : VFCOMP_STORE_0,
 111          .Component3Control = (bs >= 16) ? VFCOMP_STORE_SRC : VFCOMP_STORE_0,
 112       });
 113
 114 #if GEN_GEN >= 8
 115    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_VF_SGVS), sgvs);
 116 #endif
 117
 118    /* Disable all shader stages */
 119    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_VS), vs);
 120    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_HS), hs);
 121    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_TE), te);
 122    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_DS), DS);
 123    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_GS), gs);
 124    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_PS), gs);
 125
 126    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_SBE), sbe) {
 127       sbe.VertexURBEntryReadOffset = 1;
 128       sbe.NumberofSFOutputAttributes = 1;
 129       sbe.VertexURBEntryReadLength = 1;
 130 #if GEN_GEN >= 8
 131       sbe.ForceVertexURBEntryReadLength = true;
 132       sbe.ForceVertexURBEntryReadOffset = true;
 133 #endif
 134
 135 #if GEN_GEN >= 9
 136       for (unsigned i = 0; i < 32; i++)
 137          sbe.AttributeActiveComponentFormat[i] = ACF_XYZW;
 138 #endif
 139    }
 140
 141    /* Emit URB setup.  We tell it that the VS is active because we want it to
 142     * allocate space for the VS.  Even though one isn't run, we need VUEs to
 143     * store the data that VF is going to pass to SOL.
 144     */
 145    const unsigned entry_size[4] = { DIV_ROUND_UP(32, 64), 1, 1, 1 };
 146
 147    genX(emit_urb_setup)(cmd_buffer->device, &cmd_buffer->batch,
 148                         cmd_buffer->state.current_l3_config,
 149                         VK_SHADER_STAGE_VERTEX_BIT, entry_size);
 150
 151    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_SO_BUFFER), sob) {
 152       sob.SOBufferIndex = 0;
 153       sob.MOCS = anv_mocs_for_bo(cmd_buffer->device, dst.bo),
 154       sob.SurfaceBaseAddress = dst;
 155
 156 #if GEN_GEN >= 8
 157       sob.SOBufferEnable = true;
 158       sob.SurfaceSize = size / 4 - 1;
 159 #else
 160       sob.SurfacePitch = bs;
 161       sob.SurfaceEndAddress = anv_address_add(dst, size);
 162 #endif
 163
 164 #if GEN_GEN >= 8
 165       /* As SOL writes out data, it updates the SO_WRITE_OFFSET registers with
 166        * the end position of the stream.  We need to reset this value to 0 at
 167        * the beginning of the run or else SOL will start at the offset from
 168        * the previous draw.
 169        */
 170       sob.StreamOffsetWriteEnable = true;
 171       sob.StreamOffset = 0;
 172 #endif
 173    }
 174
 175 #if GEN_GEN <= 7
 176    /* The hardware can do this for us on BDW+ (see above) */
 177    anv_batch_emit(&cmd_buffer->batch, GENX(MI_LOAD_REGISTER_IMM), load) {
 178       load.RegisterOffset = GENX(SO_WRITE_OFFSET0_num);
 179       load.DataDWord = 0;
 180    }
 181 #endif
 182
 183    dw = anv_batch_emitn(&cmd_buffer->batch, 5, GENX(3DSTATE_SO_DECL_LIST),
 184                         .StreamtoBufferSelects0 = (1 << 0),
 185                         .NumEntries0 = 1);
 186    GENX(SO_DECL_ENTRY_pack)(&cmd_buffer->batch, dw + 3,
 187       &(struct GENX(SO_DECL_ENTRY)) {
 188          .Stream0Decl = {
 189             .OutputBufferSlot = 0,
 190             .RegisterIndex = 0,
 191             .ComponentMask = (1 << (bs / 4)) - 1,
 192          },
 193       });
 194
 195    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_STREAMOUT), so) {
 196       so.SOFunctionEnable = true;
 197       so.RenderingDisable = true;
 198       so.Stream0VertexReadOffset = 0;
 199       so.Stream0VertexReadLength = DIV_ROUND_UP(32, 64);
 200 #if GEN_GEN >= 8
 201       so.Buffer0SurfacePitch = bs;
 202 #else
 203       so.SOBufferEnable0 = true;
 204 #endif
 205    }
 206
 207 #if GEN_GEN >= 8
 208    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_VF_TOPOLOGY), topo) {
 209       topo.PrimitiveTopologyType = _3DPRIM_POINTLIST;
 210    }
 211 #endif
 212
 213    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_VF_STATISTICS), vf) {
 214       vf.StatisticsEnable = false;
 215    }
 216
 217    anv_batch_emit(&cmd_buffer->batch, GENX(3DPRIMITIVE), prim) {
 218       prim.VertexAccessType         = SEQUENTIAL;
 219       prim.PrimitiveTopologyType    = _3DPRIM_POINTLIST;
 220       prim.VertexCountPerInstance   = size / bs;
 221       prim.StartVertexLocation      = 0;
 222       prim.InstanceCount            = 1;
 223       prim.StartInstanceLocation    = 0;
 224       prim.BaseVertexLocation       = 0;
 225    }
 226
 227    cmd_buffer->state.gfx.dirty |= ANV_CMD_DIRTY_PIPELINE;
 228 }