Crossbarx Output Buffer

ENTITY MFB_CROSSBARX_OUTPUT_BUFFER IS

This component receives data through a buffer write interface. It also receives informations about Packets contained in that data and based on these informations automaticly sends the written data to output MFB interface (the Packet info is sent on separated MVB interface).

Generics

Generic	Type	Default	Description
=====	Others	=====	=====
DEVICE	string	“STRATIX10”	Target Device STRATIX10, ULTRASCALE, ..
HDR_META_WIDTH	natural	12	Width of Header Metadata signal
=====	Output MVB info	=====	=====
MVB_ITEMS	natural	8
=====	Output MFB info	=====	=====
MFB_REGIONS	natural	4
MFB_REGION_SIZE	natural	2
MFB_BLOCK_SIZE	natural	8
MFB_ITEM_WIDTH	natural	16
=====	MFB metadata info	=====	=====
MFB_META_WITH_SOF	boolean	true	metadata is valid with SOF when True, or with EOF when False
MFB_META_WIDTH	natural	1
=====	Buffer data information	=====	=====
BUF_BLOCKS	natural	16
DATA_BLOCK_SIZE	natural	8
DATA_ITEM_WIDTH	natural	8
BUF_WORDS	natural	512	Number of words in buffer
CHANNELS	natural	64	Number of Channels
PKT_SIZE_MAX	natural	2**12	Maximum size of Packet (in number of Data Items)
=====	Clock signal relations	=====	=====
META_EQ_OUTPUT	boolean	false	CLK_META is the same as CLK_OUT
INPUT_EQ_OUTPUT	boolean	false	CLK_IN is the same as CLK_OUT
=====	Derived aliases	=====	=====
DATA_BLOCK_WIDTH	natural	DATA_BLOCK_SIZE*DATA_ITEM_WIDTH
BUF_BYTES	natural	BUF_WORDSBUF_BLOCKSDATA_BLOCK_SIZE

Ports

Port	Type	Mode	Description
=====	Clock and Reset	=====	=====
CLK_META	std_logic	in	Clock and Reset for Metadata interfaces
RESET_META	std_logic	in
CLK_IN	std_logic	in	Clock and Reset for Data input
RESET_IN	std_logic	in
CLK_OUT	std_logic	in	Clock and Reset for Data output
RESET_OUT	std_logic	in
=====	Buffer data interface	=====	Runs on CLK_IN
WR_ADDR	slv_array_t (BUF_BLOCKS-1 downto 0)(log2(BUF_WORDS)-1 downto 0)	in
WR_DATA	slv_array_t (BUF_BLOCKS-1 downto 0)(DATA_BLOCK_WIDTH-1 downto 0)	in
WR_IE	slv_array_t (BUF_BLOCKS-1 downto 0)(DATA_BLOCK_SIZE-1 downto 0)	in
WR_EN	std_logic_vector(BUF_BLOCKS-1 downto 0)	in
=====	Other components input interfaces	=====	Runs on CLK_OUT
RX_HDR_META	slv_array_t (MFB_REGIONS-1 downto 0)(HDR_META_WIDTH-1 downto 0)	in
RX_HDR_MFB_META	slv_array_t (MFB_REGIONS-1 downto 0)(MFB_META_WIDTH-1 downto 0)	in
RX_HDR_CHAN	slv_array_t (MFB_REGIONS-1 downto 0)(log2(CHANNELS)-1 downto 0)	in
RX_HDR_ADDR	slv_array_t (MFB_REGIONS-1 downto 0)(log2(BUF_BYTES)-1 downto 0)	in
RX_HDR_LEN	slv_array_t (MFB_REGIONS-1 downto 0)(log2(PKT_SIZE_MAX+1)-1 downto 0)	in
RX_HDR_VLD	std_logic_vector(MFB_REGIONS-1 downto 0)	in
RX_HDR_SRC_RDY	std_logic	in
RX_HDR_DST_RDY	std_logic	out
=====	Other components output interfaces	=====	Runs on CLK_META
RD_PTR	std_logic_vector(log2(BUF_BYTES)-1 downto 0)	out	Current read pointer to Buffer
PKT_SENT_CHAN	slv_array_t (MFB_REGIONS-1 downto 0)(log2(CHANNELS)-1 downto 0)	out	Information about sending each packet
PKT_SENT_LEN	slv_array_t (MFB_REGIONS-1 downto 0)(log2(PKT_SIZE_MAX+1)-1 downto 0)	out
PKT_SENT_SRC_RDY	std_logic_vector(MFB_REGIONS-1 downto 0)	out
PKT_SENT_DST_RDY	std_logic	in
=====	Output MVB interface	=====	Runs on CLK_OUT MVB DATA contains three parts: length (TX_MVB_LEN), header metadata (TX_MVB_HDR_META), channel (TX_MVB_CHANNEL)
TX_MVB_LEN	std_logic_vector(MVB_ITEMS*log2(PKT_SIZE_MAX+1)-1 downto 0)	out
TX_MVB_HDR_META	std_logic_vector(MVB_ITEMS*HDR_META_WIDTH -1 downto 0)	out
TX_MVB_CHANNEL	std_logic_vector(MVB_ITEMS*log2(CHANNELS) -1 downto 0)	out
TX_MVB_VLD	std_logic_vector(MVB_ITEMS -1 downto 0)	out
TX_MVB_SRC_RDY	std_logic	out
TX_MVB_DST_RDY	std_logic	in
=====	Output MFB interface	=====	Runs on CLK_OUT
TX_MFB_DATA	std_logic_vector(MFB_REGIONSMFB_REGION_SIZEMFB_BLOCK_SIZE*MFB_ITEM_WIDTH-1 downto 0)	out
TX_MFB_META	std_logic_vector(MFB_REGIONS*MFB_META_WIDTH -1 downto 0)	out
TX_MFB_SOF	std_logic_vector(MFB_REGIONS -1 downto 0)	out
TX_MFB_EOF	std_logic_vector(MFB_REGIONS -1 downto 0)	out
TX_MFB_SOF_POS	std_logic_vector(MFB_REGIONS*max(1,log2(MFB_REGION_SIZE)) -1 downto 0)	out
TX_MFB_EOF_POS	std_logic_vector(MFB_REGIONSmax(1,log2(MFB_REGION_SIZEMFB_BLOCK_SIZE)) -1 downto 0)	out
TX_MFB_SRC_RDY	std_logic	out
TX_MFB_DST_RDY	std_logic	in