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src: Add multicast capabilities to Snitch DMA #60

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src: Add multicast capabilities to Snitch DMA #60

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1 change: 1 addition & 0 deletions src/backend/tpl/idma_backend.sv.tpl
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Original file line number Diff line number Diff line change
Expand Up @@ -299,6 +299,7 @@ _rsp_t ${protocol}_write_rsp_i,
addr_t addr;
logic valid;
addr_t base_addr;
addr_t mask;
} idma_mut_tf_t;


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6 changes: 4 additions & 2 deletions src/backend/tpl/idma_legalizer.sv.tpl
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Expand Up @@ -460,14 +460,16 @@ w_num_bytes_to_pb = w_page_num_bytes_to_pb;
length: req_i.length,
addr: req_i.src_addr,
valid: 1'b1,
base_addr: req_i.src_addr
base_addr: req_i.src_addr,
default: '0
};
// destination or write
w_tf_d = '{
length: req_i.length,
addr: req_i.dst_addr,
valid: 1'b1,
base_addr: req_i.dst_addr
base_addr: req_i.dst_addr,
mask: req_i.dst_mask
};
// options
opt_tf_d = '{
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2 changes: 1 addition & 1 deletion src/db/idma_axi.yml
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Expand Up @@ -56,7 +56,7 @@ legalizer_write_meta_channel: |
prot: opt_tf_q.dst_axi_opt.prot,
qos: opt_tf_q.dst_axi_opt.qos,
region: opt_tf_q.dst_axi_opt.region,
user: '0,
user: w_tf_q.mask,
atop: '0
};
legalizer_write_data_path: |
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1 change: 1 addition & 0 deletions src/frontend/inst64/idma_inst64_snitch_pkg.sv
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Expand Up @@ -17,5 +17,6 @@ package idma_inst64_snitch_pkg;
localparam logic [31:0] DMSTAT = 32'b0000101?????00000000?????0101011;
localparam logic [31:0] DMSTR = 32'b0000110??????????000000000101011;
localparam logic [31:0] DMREP = 32'b000011100000?????000000000101011;
localparam logic [31:0] DMMCAST = 32'b000100000000?????000000000101011;

endpackage
56 changes: 32 additions & 24 deletions src/frontend/inst64/idma_inst64_top.sv
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Expand Up @@ -432,9 +432,9 @@ module idma_inst64_top #(
end
end

// status of the DMA
idma_inst64_snitch_pkg::DMSTATI,
idma_inst64_snitch_pkg::DMSTAT: begin
// status of the DMA
idma_inst64_snitch_pkg::DMSTATI,
idma_inst64_snitch_pkg::DMSTAT: begin
// Parse the status index from the register or immediate.
unique casez (acc_req_i.data_op)
idma_inst64_snitch_pkg::DMSTATI : begin
Expand Down Expand Up @@ -468,27 +468,35 @@ module idma_inst64_top #(
acc_res_valid = 1'b1;
acc_req_ready_o = 1'b1;
end
end

// manipulate the strides
idma_inst64_snitch_pkg::DMSTR : begin
idma_fe_req_d.d_req[0].src_strides = acc_req_i.data_arga;
idma_fe_req_d.d_req[0].dst_strides = acc_req_i.data_argb;
acc_req_ready_o = 1'b1;
is_dma_op = 1'b1;
dma_op_name = "DMSTR";
end

// manipulate the strides
idma_inst64_snitch_pkg::DMREP : begin
idma_fe_req_d.d_req[0].reps = acc_req_i.data_arga;
acc_req_ready_o = 1'b1;
is_dma_op = 1'b1;
dma_op_name = "DMREP";
end

default:;
endcase
end

// manipulate the strides
idma_inst64_snitch_pkg::DMSTR : begin
idma_fe_req_d.d_req[0].src_strides = acc_req_i.data_arga;
idma_fe_req_d.d_req[0].dst_strides = acc_req_i.data_argb;
acc_req_ready_o = 1'b1;
is_dma_op = 1'b1;
dma_op_name = "DMSTR";
end

// manipulate the repetitions
idma_inst64_snitch_pkg::DMREP : begin
idma_fe_req_d.d_req[0].reps = acc_req_i.data_arga;
acc_req_ready_o = 1'b1;
is_dma_op = 1'b1;
dma_op_name = "DMREP";
end

// write the multicast mask in the destination user signal
idma_inst64_snitch_pkg::DMMCAST : begin
idma_fe_req_d.burst_req.dst_mask[31:0] = acc_req_i.data_arga[31:0];
acc_req_ready_o = 1'b1;
is_dma_op = 1'b1;
dma_op_name = "DMMCAST";
end

default:;
endcase
end
end

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1 change: 1 addition & 0 deletions src/include/idma/typedef.svh
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Expand Up @@ -39,6 +39,7 @@
tf_len_t length; \
axi_addr_t src_addr; \
axi_addr_t dst_addr; \
axi_addr_t dst_mask; \
options_t opt; \
} idma_req_t;
`define IDMA_TYPEDEF_RSP_T(idma_rsp_t, err_payload_t) \
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