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/*
* Copyright © 2016 Intel Corporation
*
* 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.
*/
#include "anv_private.h"
#include "genxml/gen_macros.h"
#include "genxml/genX_pack.h"
#include "common/gen_l3_config.h"
/**
* This file implements some lightweight memcpy/memset operations on the GPU
* using a vertex buffer and streamout.
*/
/**
* Returns the greatest common divisor of a and b that is a power of two.
*/
static uint64_t
gcd_pow2_u64(uint64_t a, uint64_t b)
{
assert(a > 0 || b > 0);
unsigned a_log2 = ffsll(a) - 1;
unsigned b_log2 = ffsll(b) - 1;
/* If either a or b is 0, then a_log2 or b_log2 will be UINT_MAX in which
* case, the MIN2() will take the other one. If both are 0 then we will
* hit the assert above.
*/
return 1 << MIN2(a_log2, b_log2);
}
void
genX(cmd_buffer_so_memcpy)(struct anv_cmd_buffer *cmd_buffer,
struct anv_address dst, struct anv_address src,
uint32_t size)
{
if (size == 0)
return;
/* The maximum copy block size is 4 32-bit components at a time. */
assert(size % 4 == 0);
unsigned bs = gcd_pow2_u64(16, size);
enum isl_format format;
switch (bs) {
case 4: format = ISL_FORMAT_R32_UINT; break;
case 8: format = ISL_FORMAT_R32G32_UINT; break;
case 16: format = ISL_FORMAT_R32G32B32A32_UINT; break;
default:
unreachable("Invalid size");
}
if (!cmd_buffer->state.current_l3_config) {
const struct gen_l3_config *cfg =
gen_get_default_l3_config(&cmd_buffer->device->info);
genX(cmd_buffer_config_l3)(cmd_buffer, cfg);
}
genX(cmd_buffer_set_binding_for_gen8_vb_flush)(cmd_buffer, 32, src, size);
genX(cmd_buffer_apply_pipe_flushes)(cmd_buffer);
genX(flush_pipeline_select_3d)(cmd_buffer);
uint32_t *dw;
dw = anv_batch_emitn(&cmd_buffer->batch, 5, GENX(3DSTATE_VERTEX_BUFFERS));
GENX(VERTEX_BUFFER_STATE_pack)(&cmd_buffer->batch, dw + 1,
&(struct GENX(VERTEX_BUFFER_STATE)) {
.VertexBufferIndex = 32, /* Reserved for this */
.AddressModifyEnable = true,
.BufferStartingAddress = src,
.BufferPitch = bs,
.MOCS = anv_mocs_for_bo(cmd_buffer->device, src.bo),
#if (GEN_GEN >= 8)
.BufferSize = size,
#else
.EndAddress = anv_address_add(src, size - 1),
#endif
});
dw = anv_batch_emitn(&cmd_buffer->batch, 3, GENX(3DSTATE_VERTEX_ELEMENTS));
GENX(VERTEX_ELEMENT_STATE_pack)(&cmd_buffer->batch, dw + 1,
&(struct GENX(VERTEX_ELEMENT_STATE)) {
.VertexBufferIndex = 32,
.Valid = true,
.SourceElementFormat = format,
.SourceElementOffset = 0,
.Component0Control = (bs >= 4) ? VFCOMP_STORE_SRC : VFCOMP_STORE_0,
.Component1Control = (bs >= 8) ? VFCOMP_STORE_SRC : VFCOMP_STORE_0,
.Component2Control = (bs >= 12) ? VFCOMP_STORE_SRC : VFCOMP_STORE_0,
.Component3Control = (bs >= 16) ? VFCOMP_STORE_SRC : VFCOMP_STORE_0,
});
#if GEN_GEN >= 8
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_VF_SGVS), sgvs);
#endif
/* Disable all shader stages */
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_VS), vs);
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_HS), hs);
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_TE), te);
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_DS), DS);
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_GS), gs);
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_PS), gs);
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_SBE), sbe) {
sbe.VertexURBEntryReadOffset = 1;
sbe.NumberofSFOutputAttributes = 1;
sbe.VertexURBEntryReadLength = 1;
#if GEN_GEN >= 8
sbe.ForceVertexURBEntryReadLength = true;
sbe.ForceVertexURBEntryReadOffset = true;
#endif
#if GEN_GEN >= 9
for (unsigned i = 0; i < 32; i++)
sbe.AttributeActiveComponentFormat[i] = ACF_XYZW;
#endif
}
/* Emit URB setup. We tell it that the VS is active because we want it to
* allocate space for the VS. Even though one isn't run, we need VUEs to
* store the data that VF is going to pass to SOL.
*/
const unsigned entry_size[4] = { DIV_ROUND_UP(32, 64), 1, 1, 1 };
genX(emit_urb_setup)(cmd_buffer->device, &cmd_buffer->batch,
cmd_buffer->state.current_l3_config,
VK_SHADER_STAGE_VERTEX_BIT, entry_size, NULL);
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_SO_BUFFER), sob) {
#if GEN_GEN < 12
sob.SOBufferIndex = 0;
#else
sob._3DCommandOpcode = 0;
sob._3DCommandSubOpcode = SO_BUFFER_INDEX_0_CMD;
#endif
sob.MOCS = anv_mocs_for_bo(cmd_buffer->device, dst.bo),
sob.SurfaceBaseAddress = dst;
#if GEN_GEN >= 8
sob.SOBufferEnable = true;
sob.SurfaceSize = size / 4 - 1;
#else
sob.SurfacePitch = bs;
sob.SurfaceEndAddress = anv_address_add(dst, size);
#endif
#if GEN_GEN >= 8
/* As SOL writes out data, it updates the SO_WRITE_OFFSET registers with
* the end position of the stream. We need to reset this value to 0 at
* the beginning of the run or else SOL will start at the offset from
* the previous draw.
*/
sob.StreamOffsetWriteEnable = true;
sob.StreamOffset = 0;
#endif
}
#if GEN_GEN <= 7
/* The hardware can do this for us on BDW+ (see above) */
anv_batch_emit(&cmd_buffer->batch, GENX(MI_LOAD_REGISTER_IMM), load) {
load.RegisterOffset = GENX(SO_WRITE_OFFSET0_num);
load.DataDWord = 0;
}
#endif
dw = anv_batch_emitn(&cmd_buffer->batch, 5, GENX(3DSTATE_SO_DECL_LIST),
.StreamtoBufferSelects0 = (1 << 0),
.NumEntries0 = 1);
GENX(SO_DECL_ENTRY_pack)(&cmd_buffer->batch, dw + 3,
&(struct GENX(SO_DECL_ENTRY)) {
.Stream0Decl = {
.OutputBufferSlot = 0,
.RegisterIndex = 0,
.ComponentMask = (1 << (bs / 4)) - 1,
},
});
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_STREAMOUT), so) {
so.SOFunctionEnable = true;
so.RenderingDisable = true;
so.Stream0VertexReadOffset = 0;
so.Stream0VertexReadLength = DIV_ROUND_UP(32, 64);
#if GEN_GEN >= 8
so.Buffer0SurfacePitch = bs;
#else
so.SOBufferEnable0 = true;
#endif
}
#if GEN_GEN >= 8
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_VF_TOPOLOGY), topo) {
topo.PrimitiveTopologyType = _3DPRIM_POINTLIST;
}
#endif
anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_VF_STATISTICS), vf) {
vf.StatisticsEnable = false;
}
anv_batch_emit(&cmd_buffer->batch, GENX(3DPRIMITIVE), prim) {
prim.VertexAccessType = SEQUENTIAL;
prim.PrimitiveTopologyType = _3DPRIM_POINTLIST;
prim.VertexCountPerInstance = size / bs;
prim.StartVertexLocation = 0;
prim.InstanceCount = 1;
prim.StartInstanceLocation = 0;
prim.BaseVertexLocation = 0;
}
genX(cmd_buffer_update_dirty_vbs_for_gen8_vb_flush)(cmd_buffer, SEQUENTIAL,
1ull << 32);
cmd_buffer->state.gfx.dirty |= ANV_CMD_DIRTY_PIPELINE;
}
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