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conn_manager.v
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conn_manager.v
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//===============================================================//
// Module name: connection manager of UniMan;
// Communication with lijunnan([email protected])
// Last edited time: 2018/11/11 (Happy Singles' Day, Je t'attendrai toujours.)
// Function outline: UniMan_v1.0
//===============================================================//
`timescale 1ns/1ps
/* function description:
* 1) extract 5-tuple in the metadata, we assurme the location of 5-tuple
* is metadata[207:104], content length is [103:88], tcp flag is [87:80],
* send_seq is [79:48], ack_seq is [47:16], and window is [15:0];
* 2) calculate hash value used to search hash tables, the hash
* functions are: a) flow_key[95:80]^[79:64]^[47:32]^[15:0];
* 3) search the flowKey table according to the result of hash table;
* 5) if hitting, return the entryID (i.e., connID); if missing, adding a new
* flowKey entry by hardware itself (only for SYN packet);
* 6) updating current matched connection or adding a new connection;
* 7) in the mean time, updating agingTb with current timestamp.
*/
module connection_manager(
reset,
clk,
metadata_in_valid,
metadata_in,
action_valid,
action,
eventInfo_valid,
eventInfo,
idx_hashTb_search,
idx_hashTb_conf,
rdValid_hashTb_search,
rdValid_hashTb_conf,
wrValid_hashTb_conf,
data_hashTb_conf,
ctx_hashTb_search,
ctx_hashTb_conf,
idx_flowKTb_search,
idx_flowKTb_conf,
rdValid_flowKTb_search,
rdValid_flowKTb_conf,
wrValid_flowKTb_conf,
data_flowKTb_conf,
ctx_flowKTb_search,
ctx_flowKTb_conf,
idx_connTb_search,
idx_connTb_conf,
data_connTb_conf,
rdValid_connTb_search,
wrValid_connTb_conf,
ctx_connTb_search,
del_conn_valid,
del_conn_info,
ready,
ctrl_in_valid,
ctrl_opt,
ctrl_addr,
ctrl_data_in,
ctrl_out_valid,
ctrl_data_out
);
/* width or depth or words info of signals
*/
parameter w_meta = 209, // width of metadata;
w_eventInfo = 16, // width of eventInfo;
w_key = 104, // width of flow key;
w_tcpFlag = 8, // width of tcp flag, top 2-bit is pad;
w_evb = 8, // width of event bitmap;
w_connTb = 72, // the width of connTb(table) entry, (4b clientState,
// 32b sendSeq, 4b serverState, 32b sendSeq;
w_flowKTb = 120, // the width of flowKTb, (104b flowK+16b index);
d_connTb = 10, // depth of connTb;
d_flowKTb = 10, // depth of flowKTb;
w_hashTb = 17, // the width of hashTb entry (1b valid + 16b flowKTb_index);
d_hashTb = 10, // depth of hashTb;
w_flowKIdx_info = 16, // width of flowKey_idx_info, i.e., flowKTb_index;
w_connIdx_info = 19, // width of conn_idx_info, includes hitness, addness,
// direction, and connection_index;
w_flowID = 16, // width of flowID;
b_hit_meta = 208, // last bit of hitness in metadata;
b_flowKey_meta = 104, // last bit of flowKey in metadata;
b_tcpFlag_meta = 80, // last bit of tcp flag in metadata;
b_sendSeq_meta = 48, // last bit of sendSeq in metadata;
b_ackSeq_meta = 16, // last bit of ackSeq in metadata;
b_window_meta = 0, // last bit of window in metadata;
b_tcpInfo_meta = 0, // last bit of tcp info. in metadata;
w_tcpInfo = 72; // width of tcp info., includes tcp flag, send seq, ack seq
input clk;
input reset;
input metadata_in_valid;
input [w_meta-1:0] metadata_in;
output wire action_valid;
output wire action;
output wire eventInfo_valid;
output wire [w_eventInfo-1:0] eventInfo;
output wire [d_hashTb-1:0] idx_hashTb_search;
output wire [d_hashTb-1:0] idx_hashTb_conf;
output wire rdValid_hashTb_search;
output wire rdValid_hashTb_conf;
output wire wrValid_hashTb_conf;
output wire [w_hashTb-1:0] data_hashTb_conf;
input [w_hashTb-1:0] ctx_hashTb_search;
input [w_hashTb-1:0] ctx_hashTb_conf;
output wire [d_flowKTb-1:0] idx_flowKTb_search;
output wire [d_flowKTb-1:0] idx_flowKTb_conf;
output wire rdValid_flowKTb_search;
output wire rdValid_flowKTb_conf;
output wire wrValid_flowKTb_conf;
output wire [w_flowKTb-1:0] data_flowKTb_conf;
input [w_flowKTb-1:0] ctx_flowKTb_search;
input [w_flowKTb-1:0] ctx_flowKTb_conf;
output wire [d_connTb-1:0] idx_connTb_search;
output wire [d_connTb-1:0] idx_connTb_conf;
output wire [w_connTb-1:0] data_connTb_conf;
output wire rdValid_connTb_search;
output wire wrValid_connTb_conf;
input wire [w_connTb-1:0] ctx_connTb_search;
input del_conn_valid;
input [w_flowID-1:0] del_conn_info;
output wire ready;
input ctrl_in_valid;
input [1:0] ctrl_opt;
input [31:0] ctrl_addr;
input [31:0] ctrl_data_in;
output wire ctrl_out_valid;
output wire [31:0] ctrl_data_out;
/*************************************************************************************/
/** varialbe declaration */
/** from lookup_hashTb to lookup_flowKTb */
wire flowK_idx_valid;
wire [w_flowKIdx_info-1:0] flowK_idx_info;
/** from lookup_flowKTb to lookup_connTb */
wire conn_idx_valid;
wire [w_connIdx_info-1:0] conn_idx_info;
/** from lookup_flowKTb to conf_connTb */
wire add_conn_valid;
wire [w_key+w_flowID-1:0] add_conn_info;
wire pull_freeFlowID_enable;
wire [w_flowID-1:0] free_flowID;
/** from lookup_connTb to conf_connTb */
wire conn_closed_valid;
wire [w_flowID-1:0] conn_closed_info;
/*************************************************************************************/
/* submodule declaration */
/*************************************************************************************/
/** lookup_hashTb is used to lookup hashTb, and then get flowKey_idx;
* if hashTb miss, flowKey_idx will be assigned '0';
*/
lookup_hashTb lookup_hashTb(
.clk(clk),
.reset(reset),
.metadata_in_valid(metadata_in_valid),
.metadata_in(metadata_in[b_flowKey_meta+w_key-1:b_flowKey_meta]),
.hashV(idx_hashTb_search),
.hashV_valid(rdValid_hashTb_search),
.ctx_hashTb(ctx_hashTb_search),
.flowK_idx_valid(flowK_idx_valid),
.flowK_idx_info(flowK_idx_info)
);
/*************************************************************************************/
/** used lookup flowKTb, and then get conn_idx;
* if flowKTb miss, conn_idx will be assigned '0';
* there have top three bits used to represnet hitness, addness, and direction.
*/
lookup_flowKTb lookup_flowKTb(
.clk(clk),
.reset(reset),
.metadata_in_valid(metadata_in_valid),
.metadata_in({metadata_in[b_hit_meta], metadata_in[b_flowKey_meta+w_key-1:b_flowKey_meta],
metadata_in[b_tcpFlag_meta+w_tcpFlag-1:b_tcpFlag_meta]}),
.flowK_idx_valid(flowK_idx_valid),
.flowK_idx_info(flowK_idx_info),
.idx_flowKTb(idx_flowKTb_search),
.rdValid_flowKTb(rdValid_flowKTb_search),
.ctx_flowKTb(ctx_flowKTb_search),
.conn_idx_valid(conn_idx_valid),
.conn_idx_info(conn_idx_info),
.conn_add_valid(add_conn_valid),
.conn_add_info(add_conn_info),
.pull_freeFlowID_enable(pull_freeFlowID_enable),
.free_flowID(free_flowID)
);
/*************************************************************************************/
/** used lookup and update connTb */
lookup_connTb lookup_connTb(
.clk(clk),
.reset(reset),
.metadata_in_valid(metadata_in_valid),
.metadata_in(metadata_in[b_ackSeq_meta+w_tcpInfo-1:b_ackSeq_meta]),
.conn_idx_valid(conn_idx_valid),
.conn_idx_info(conn_idx_info),
.idx_connTb_search(idx_connTb_search),
.idx_connTb_conf(idx_connTb_conf),
.rdValid_connTb_search(rdValid_connTb_search),
.wrValid_connTb_conf(wrValid_connTb_conf),
.data_connTb_conf(data_connTb_conf),
.ctx_connTb_search(ctx_connTb_search),
.action_valid(action_valid),
.action(action),
.eventInfo_valid(eventInfo_valid),
.eventInfo(eventInfo),
.conn_closed_valid(conn_closed_valid),
.conn_closed_info(conn_closed_info)
);
/*************************************************************************************/
/** used add and delete connection */
conf_connTb conf_connTb(
.clk(clk),
.reset(reset),
.add_conn_valid(add_conn_valid),
.add_conn_info(add_conn_info),
.del_conn_valid(del_conn_valid),
.del_conn_info(del_conn_info),
.conn_closed_valid(conn_closed_valid),
.conn_closed_info(conn_closed_info),
.idx_hashTb(idx_hashTb_conf),
.rdValid_hashTb(rdValid_hashTb_conf),
.wrValid_hashTb(wrValid_hashTb_conf),
.data_hashTb(data_hashTb_conf),
.ctx_hashTb(ctx_hashTb_conf),
.idx_flowKTb(idx_flowKTb_conf),
.rdValid_flowKTb(rdValid_flowKTb_conf),
.wrValid_flowKTb(wrValid_flowKTb_conf),
.data_flowKTb(data_flowKTb_conf),
.ctx_flowKTb(ctx_flowKTb_conf),
.pull_freeFlowID_enable(pull_freeFlowID_enable),
.free_flowID(free_flowID),
.ready(ready),
.ctrl_in_valid(ctrl_in_valid),
.ctrl_opt(),
.ctrl_addr(),
.ctrl_data_in(),
.ctrl_out_valid(),
.ctrl_data_out()
);
endmodule