Files
vortex/hw/rtl/tex_unit/VX_tex_unit.v
2021-07-30 21:03:14 -07:00

226 lines
8.6 KiB
Verilog

`include "VX_tex_define.vh"
module VX_tex_unit #(
parameter CORE_ID = 0
) (
input wire clk,
input wire reset,
// Texture unit <-> Memory Unit
VX_dcache_req_if dcache_req_if,
VX_dcache_rsp_if dcache_rsp_if,
// Inputs
VX_tex_req_if tex_req_if,
VX_tex_csr_if tex_csr_if,
// Outputs
VX_tex_rsp_if tex_rsp_if
);
localparam REQ_INFO_WIDTH_S = `NR_BITS + 1 + `NW_BITS + 32;
localparam REQ_INFO_WIDTH_A = `TEX_FORMAT_BITS + REQ_INFO_WIDTH_S;
localparam REQ_INFO_WIDTH_M = (2 * `NUM_THREADS * `BLEND_FRAC) + REQ_INFO_WIDTH_A;
reg [`TEX_MIPOFF_BITS-1:0] tex_mipoff [`NUM_TEX_UNITS-1:0][(1 << `TEX_LOD_BITS)-1:0];
reg [`TEX_DIM_BITS-1:0] tex_dims [1:0][`NUM_TEX_UNITS-1:0][(1 << `TEX_LOD_BITS)-1:0];
reg [`TEX_ADDR_BITS-1:0] tex_baddr [`NUM_TEX_UNITS-1:0];
reg [`TEX_FORMAT_BITS-1:0] tex_format [`NUM_TEX_UNITS-1:0];
reg [`TEX_WRAP_BITS-1:0] tex_wraps [1:0][`NUM_TEX_UNITS-1:0];
reg [`TEX_FILTER_BITS-1:0] tex_filter [`NUM_TEX_UNITS-1:0];
// CSRs programming
for (genvar i = 0; i < `NUM_TEX_UNITS; ++i) begin
wire [`TEX_LOD_BITS-1:0] mip_level = tex_csr_if.write_data[28 +: `TEX_LOD_BITS];
always @(posedge clk) begin
if (tex_csr_if.write_enable) begin
case (tex_csr_if.write_addr)
`CSR_TEX_ADDR(i) : begin
tex_baddr[i] <= tex_csr_if.write_data[`TEX_ADDR_BITS-1:0];
end
`CSR_TEX_FORMAT(i) : begin
tex_format[i] <= tex_csr_if.write_data[`TEX_FORMAT_BITS-1:0];
end
`CSR_TEX_WRAP(i) : begin
tex_wraps[0][i] <= tex_csr_if.write_data[0 +: `TEX_WRAP_BITS];
tex_wraps[1][i] <= tex_csr_if.write_data[`TEX_WRAP_BITS +: `TEX_WRAP_BITS];
end
`CSR_TEX_FILTER(i) : begin
tex_filter[i] <= tex_csr_if.write_data[`TEX_FILTER_BITS-1:0];
end
`CSR_TEX_MIPOFF(i) : begin
tex_mipoff[i][mip_level] <= tex_csr_if.write_data[`TEX_MIPOFF_BITS-1:0];
end
`CSR_TEX_WIDTH(i) : begin
tex_dims[0][i][mip_level] <= tex_csr_if.write_data[`TEX_DIM_BITS-1:0];
end
`CSR_TEX_HEIGHT(i) : begin
tex_dims[1][i][mip_level] <= tex_csr_if.write_data[`TEX_DIM_BITS-1:0];
end
endcase
end
end
end
// mipmap attributes
wire [`NUM_THREADS-1:0][`TEX_MIPOFF_BITS-1:0] sel_mipoff;
wire [1:0][`NUM_THREADS-1:0][`TEX_DIM_BITS-1:0] sel_dims;
for (genvar i = 0; i < `NUM_THREADS; ++i) begin
wire [`NTEX_BITS-1:0] unit = tex_req_if.unit[`NTEX_BITS-1:0];
wire [`TEX_LOD_BITS-1:0] mip_level = tex_req_if.lod[i][20+:`TEX_LOD_BITS];
assign sel_mipoff[i] = tex_mipoff[unit][mip_level];
assign sel_dims[0][i] = tex_dims[0][unit][mip_level];
assign sel_dims[1][i] = tex_dims[1][unit][mip_level];
end
// address generation
wire mem_req_valid;
wire [`NUM_THREADS-1:0] mem_req_tmask;
wire [`TEX_FILTER_BITS-1:0] mem_req_filter;
wire [`TEX_STRIDE_BITS-1:0] mem_req_stride;
wire [1:0][`NUM_THREADS-1:0][`BLEND_FRAC-1:0] mem_req_blends;
wire [`NUM_THREADS-1:0][3:0][31:0] mem_req_addr;
wire [REQ_INFO_WIDTH_A-1:0] mem_req_info;
wire mem_req_ready;
VX_tex_addr #(
.CORE_ID (CORE_ID),
.REQ_INFO_WIDTH (REQ_INFO_WIDTH_A),
.NUM_REQS (`NUM_THREADS)
) tex_addr (
.clk (clk),
.reset (reset),
.req_valid (tex_req_if.valid),
.req_tmask (tex_req_if.tmask),
.req_coords (tex_req_if.coords),
.req_format (tex_format[tex_req_if.unit]),
.req_filter (tex_filter[tex_req_if.unit]),
.req_wraps ({tex_wraps[1][tex_req_if.unit], tex_wraps[0][tex_req_if.unit]}),
.req_baseaddr(tex_baddr[tex_req_if.unit]),
.req_mipoffset(sel_mipoff),
.req_logdims(sel_dims),
.req_info ({tex_format[tex_req_if.unit], tex_req_if.rd, tex_req_if.wb, tex_req_if.wid, tex_req_if.PC}),
.req_ready (tex_req_if.ready),
.rsp_valid (mem_req_valid),
.rsp_tmask (mem_req_tmask),
.rsp_filter (mem_req_filter),
.rsp_stride (mem_req_stride),
.rsp_addr (mem_req_addr),
.rsp_blends (mem_req_blends),
.rsp_info (mem_req_info),
.rsp_ready (mem_req_ready)
);
// retrieve texel values from memory
wire mem_rsp_valid;
wire [`NUM_THREADS-1:0] mem_rsp_tmask;
wire [`NUM_THREADS-1:0][3:0][31:0] mem_rsp_data;
wire [REQ_INFO_WIDTH_M-1:0] mem_rsp_info;
wire mem_rsp_ready;
VX_tex_memory #(
.CORE_ID (CORE_ID),
.REQ_INFO_WIDTH (REQ_INFO_WIDTH_M),
.NUM_REQS (`NUM_THREADS)
) tex_memory (
.clk (clk),
.reset (reset),
// memory interface
.dcache_req_if (dcache_req_if),
.dcache_rsp_if (dcache_rsp_if),
// inputs
.req_valid (mem_req_valid),
.req_tmask (mem_req_tmask),
.req_filter(mem_req_filter),
.req_stride(mem_req_stride),
.req_addr (mem_req_addr),
.req_info ({mem_req_blends, mem_req_info}),
.req_ready (mem_req_ready),
// outputs
.rsp_valid (mem_rsp_valid),
.rsp_tmask (mem_rsp_tmask),
.rsp_data (mem_rsp_data),
.rsp_info (mem_rsp_info),
.rsp_ready (mem_rsp_ready)
);
// apply sampler
wire [`NUM_THREADS-1:0][1:0][`BLEND_FRAC-1:0] rsp_blends;
wire [`TEX_FORMAT_BITS-1:0] rsp_format;
wire [REQ_INFO_WIDTH_S-1:0] rsp_info;
assign {rsp_blends, rsp_format, rsp_info} = mem_rsp_info;
VX_tex_sampler #(
.CORE_ID (CORE_ID),
.REQ_INFO_WIDTH (REQ_INFO_WIDTH_S),
.NUM_REQS (`NUM_THREADS)
) tex_sampler (
.clk (clk),
.reset (reset),
// inputs
.req_valid (mem_rsp_valid),
.req_tmask (mem_rsp_tmask),
.req_data (mem_rsp_data),
.req_format (rsp_format),
.req_blends (rsp_blends),
.req_info (rsp_info),
.req_ready (mem_rsp_ready),
// outputs
.rsp_valid (tex_rsp_if.valid),
.rsp_tmask (tex_rsp_if.tmask),
.rsp_data (tex_rsp_if.data),
.rsp_info ({tex_rsp_if.rd, tex_rsp_if.wb, tex_rsp_if.wid, tex_rsp_if.PC}),
.rsp_ready (tex_rsp_if.ready)
);
`ifdef DBG_PRINT_TEX
for (genvar i = 0; i < `NUM_TEX_UNITS; ++i) begin
always @(posedge clk) begin
if (tex_csr_if.write_enable
&& (tex_csr_if.write_addr >= `CSR_TEX_BEGIN(i)
&& tex_csr_if.write_addr < `CSR_TEX_BEGIN(i+1))) begin
$display("%t: core%0d-tex-csr: tex%0d_addr=%0h", $time, CORE_ID, i, tex_baddr[i]);
$display("%t: core%0d-tex-csr: tex%0d_format=%0h", $time, CORE_ID, i, tex_format[i]);
$display("%t: core%0d-tex-csr: tex%0d_wrap_u=%0h", $time, CORE_ID, i, tex_wraps[0][i]);
$display("%t: core%0d-tex-csr: tex%0d_wrap_v=%0h", $time, CORE_ID, i, tex_wraps[1][i]);
$display("%t: core%0d-tex-csr: tex%0d_filter=%0h", $time, CORE_ID, i, tex_filter[i]);
$display("%t: core%0d-tex-csr: tex%0d_mipoff[0]=%0h", $time, CORE_ID, i, tex_mipoff[i][0]);
$display("%t: core%0d-tex-csr: tex%0d_width[0]=%0h", $time, CORE_ID, i, tex_dims[0][i][0]);
$display("%t: core%0d-tex-csr: tex%0d_height[0]=%0h", $time, CORE_ID, i, tex_dims[1][i][0]);
end
end
end
always @(posedge clk) begin
if (tex_req_if.valid && tex_req_if.ready) begin
$display("%t: core%0d-tex-req: wid=%0d, PC=%0h, tmask=%b, unit=%0d, lod=%0h, u=",
$time, CORE_ID, tex_req_if.wid, tex_req_if.PC, tex_req_if.tmask, tex_req_if.unit, tex_req_if.lod);
`PRINT_ARRAY1D(tex_req_if.coords[0], `NUM_THREADS);
$write(", v=");
`PRINT_ARRAY1D(tex_req_if.coords[1], `NUM_THREADS);
$write("\n");
end
if (tex_rsp_if.valid && tex_rsp_if.ready) begin
$write("%t: core%0d-tex-rsp: wid=%0d, PC=%0h, tmask=%b, data=",
$time, CORE_ID, tex_rsp_if.wid, tex_rsp_if.PC, tex_rsp_if.tmask);
`PRINT_ARRAY1D(tex_rsp_if.data, `NUM_THREADS);
$write("\n");
end
end
`endif
endmodule