diff options
Diffstat (limited to 'netfpga10g/hdl')
| -rw-r--r-- | netfpga10g/hdl/buff.vhd | 192 | ||||
| -rw-r--r-- | netfpga10g/hdl/dma.vhd | 640 | ||||
| -rw-r--r-- | netfpga10g/hdl/engine.vhd | 570 | ||||
| -rw-r--r-- | netfpga10g/hdl/eth.vhd | 219 | ||||
| -rw-r--r-- | netfpga10g/hdl/eth_rx.vhd | 84 | ||||
| -rw-r--r-- | netfpga10g/hdl/eth_tx.vhd | 68 | ||||
| -rw-r--r-- | netfpga10g/hdl/mdio.vhd | 223 | ||||
| -rw-r--r-- | netfpga10g/hdl/pcie.vhd | 268 | ||||
| -rw-r--r-- | netfpga10g/hdl/pcie_rx.vhd | 98 | ||||
| -rw-r--r-- | netfpga10g/hdl/pcie_tx.vhd | 178 | ||||
| -rw-r--r-- | netfpga10g/hdl/pcie_wrapper.vhd | 358 | ||||
| -rw-r--r-- | netfpga10g/hdl/port_fifo.vhd | 94 | ||||
| -rw-r--r-- | netfpga10g/hdl/recv_mux.vhd | 86 | ||||
| -rw-r--r-- | netfpga10g/hdl/rx_eth.vhd | 168 | ||||
| -rw-r--r-- | netfpga10g/hdl/send_mux.vhd | 77 | ||||
| -rw-r--r-- | netfpga10g/hdl/system_loop.vhd | 253 | ||||
| -rw-r--r-- | netfpga10g/hdl/top.vhd | 243 | ||||
| -rw-r--r-- | netfpga10g/hdl/tx_eth.vhd | 96 |
18 files changed, 3915 insertions, 0 deletions
diff --git a/netfpga10g/hdl/buff.vhd b/netfpga10g/hdl/buff.vhd new file mode 100644 index 0000000..39b3a80 --- /dev/null +++ b/netfpga10g/hdl/buff.vhd @@ -0,0 +1,192 @@ + +library IEEE; +use IEEE.STD_LOGIC_1164.ALL; +use IEEE.NUMERIC_STD.ALL; +library UNISIM; +use UNISIM.VComponents.all; + +entity buff is + Port ( wr_clk : in STD_LOGIC; + wr_en : in STD_LOGIC; + wr_data : in STD_LOGIC_VECTOR (63 downto 0); + wr_done : in STD_LOGIC; + wr_cancel : in std_logic := '0'; + wr_accept : out STD_LOGIC; + rd_clk : in STD_LOGIC; + rd_en : in STD_LOGIC; + rd_data : out STD_LOGIC_VECTOR (63 downto 0) := (others => '0'); + rd_length : out STD_LOGIC_VECTOR (8 downto 0) := (others => '0'); + rd_valid : out STD_LOGIC := '0'); +end buff; + +architecture arch of buff is + + COMPONENT ram_4kB + PORT ( + clka : IN STD_LOGIC; + wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0); + addra : IN STD_LOGIC_VECTOR(8 DOWNTO 0); + dina : IN STD_LOGIC_VECTOR(63 DOWNTO 0); + clkb : IN STD_LOGIC; + addrb : IN STD_LOGIC_VECTOR(8 DOWNTO 0); + doutb : OUT STD_LOGIC_VECTOR(63 DOWNTO 0) + ); + END COMPONENT; + + signal ram_wr_en : std_logic_vector(0 downto 0); + signal ram_wr_addr : std_logic_vector(8 downto 0); + signal ram_wr_data : std_logic_vector(63 downto 0); + + signal ram_rd_addr : std_logic_vector(8 downto 0); + signal ram_rd_data : std_logic_vector(63 downto 0); + + constant W1 : std_logic_vector(1 downto 0) := "00"; + constant W2 : std_logic_vector(1 downto 0) := "11"; + constant R1 : std_logic_vector(1 downto 0) := "01"; + constant R2 : std_logic_vector(1 downto 0) := "10"; + + signal wr_owner : std_logic_vector(1 downto 0) := W1; + signal rd_owner : std_logic_vector(1 downto 0) := W1; + signal wr_owner_tmp : std_logic_vector(1 downto 0) := W1; + signal wr_owner_sync : std_logic_vector(1 downto 0) := W1; + + -- MAX: 256 bytes less than 4kB, for ouroboros + -- 4kB = 512 x 64 bits + -- 256 bytes = 32 x 64 bits + -- 512 - 32 = 480 + -- 480 = "111100000" + + constant MAX : std_logic_vector(8 downto 0) := "111100000"; + constant ZERO : std_logic_vector(8 downto 0) := "000000000"; + constant ONE : std_logic_vector(8 downto 0) := "000000001"; + + type state_t is (state_empty, state_wait, state_full, state_first, state_valid); + + signal rd_state : state_t := state_empty; + signal rd_addr : std_logic_vector(8 downto 0) := MAX; + +begin + + ram : ram_4kB + PORT MAP ( + clka => wr_clk, + wea => ram_wr_en, + addra => ram_wr_addr, + dina => ram_wr_data, + clkb => rd_clk, + addrb => ram_rd_addr, + doutb => ram_rd_data + ); + + wr_accept <= '1' when (wr_owner = W1 or wr_owner = W2) and wr_done = '0' and wr_cancel = '0' else '0'; + + process (wr_clk) + variable wr_count : std_logic_vector(8 downto 0) := ZERO; + begin + if rising_edge(wr_clk) then + ram_wr_en(0) <= '0'; + ram_wr_addr <= (others => '0'); + ram_wr_data <= (others => '0'); + + if wr_owner = W1 or wr_owner = W2 then + if wr_cancel = '1' then + wr_count := ZERO; + + elsif wr_done = '1' then + if wr_count /= ZERO then + if wr_owner = W1 then + wr_owner <= R1; + ram_wr_data(1 downto 0) <= R1; + else + wr_owner <= R2; + ram_wr_data(1 downto 0) <= R2; + end if; + + ram_wr_en(0) <= '1'; + ram_wr_addr <= MAX; + ram_wr_data(10 downto 2) <= wr_count; + wr_count := ZERO; + end if; + + elsif wr_en = '1' then + if wr_count /= MAX then + ram_wr_en(0) <= '1'; + ram_wr_addr <= wr_count; + ram_wr_data <= wr_data; + wr_count := std_logic_vector(unsigned(wr_count) + 1); + end if; + end if; + elsif wr_owner = R1 then + if wr_owner_sync = W2 then + wr_owner <= W2; + end if; + elsif wr_owner = R2 then + if wr_owner_sync = W1 then + wr_owner <= W1; + end if; + end if; + + wr_owner_tmp <= rd_owner; + wr_owner_sync <= wr_owner_tmp; + end if; + end process; + + ram_rd_addr <= std_logic_vector(unsigned(rd_addr) + 1) + when rd_state = state_valid and rd_en = '1' + else rd_addr; + + process (rd_clk) + variable rd_count : std_logic_vector(8 downto 0) := ZERO; + variable tmp : std_logic_vector(1 downto 0); + begin + if rising_edge(rd_clk) then + if rd_state = state_empty then + rd_state <= state_wait; + + elsif rd_state = state_wait then + tmp := ram_rd_data(1 downto 0); + + if (rd_owner = W1 and tmp = R1) or + (rd_owner = W2 and tmp = R2) then + + rd_state <= state_full; + rd_addr <= ZERO; + rd_count := ram_rd_data(10 downto 2); + rd_owner <= tmp; + end if; + + elsif rd_state = state_full then + rd_state <= state_first; + rd_addr <= ONE; + + elsif rd_state = state_first then + rd_state <= state_valid; + rd_valid <= '1'; + rd_data <= ram_rd_data; + rd_length <= rd_count; + + elsif rd_state = state_valid then + if rd_en = '1' then + if rd_addr = rd_count then + rd_state <= state_empty; + rd_addr <= MAX; + rd_valid <= '0'; + rd_data <= (others => '0'); + rd_length <= ZERO; + rd_count := ZERO; + + if rd_owner = R1 then + rd_owner <= W2; + else + rd_owner <= W1; + end if; + else + rd_addr <= ram_rd_addr; + rd_data <= ram_rd_data; + end if; + end if; + end if; + end if; + end process; +end arch; + diff --git a/netfpga10g/hdl/dma.vhd b/netfpga10g/hdl/dma.vhd new file mode 100644 index 0000000..4c7e4f8 --- /dev/null +++ b/netfpga10g/hdl/dma.vhd @@ -0,0 +1,640 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity dma is +generic ( + BITS : integer := 14 +); +port ( + clk : in std_logic; + reset : in std_logic; + + rx_read : in std_logic; + rx_write : in std_logic; + rx_complete : in std_logic; + rx_data : in std_logic_vector(63 downto 0); + rx_address : in std_logic_vector(28 downto 0); + + tx_read : out std_logic; + tx_write : out std_logic; + tx_complete : out std_logic; + tx_data : out std_logic_vector(63 downto 0); + tx_address : out std_logic_vector(28 downto 0); + tx_length : out std_logic_vector(8 downto 0); + tx_accept : in std_logic; + tx_done : in std_logic; + + port0_read : out std_logic; + port0_rd_data : in std_logic_vector(63 downto 0); + port0_rd_empty : in std_logic; + port0_rd_count : in std_logic_vector(BITS downto 0); + + port0_write : out std_logic; + port0_wr_data : out std_logic_vector(63 downto 0); + port0_wr_full : in std_logic; + port0_wr_count : in std_logic_vector(BITS downto 0); + + port1_read : out std_logic; + port1_rd_data : in std_logic_vector(63 downto 0); + port1_rd_empty : in std_logic; + port1_rd_count : in std_logic_vector(BITS downto 0); + + port1_write : out std_logic; + port1_wr_data : out std_logic_vector(63 downto 0); + port1_wr_full : in std_logic; + port1_wr_count : in std_logic_vector(BITS downto 0); + + port2_read : out std_logic; + port2_rd_data : in std_logic_vector(63 downto 0); + port2_rd_empty : in std_logic; + port2_rd_count : in std_logic_vector(BITS downto 0); + + port2_write : out std_logic; + port2_wr_data : out std_logic_vector(63 downto 0); + port2_wr_full : in std_logic; + port2_wr_count : in std_logic_vector(BITS downto 0); + + port3_read : out std_logic; + port3_rd_data : in std_logic_vector(63 downto 0); + port3_rd_empty : in std_logic; + port3_rd_count : in std_logic_vector(BITS downto 0); + + port3_write : out std_logic; + port3_wr_data : out std_logic_vector(63 downto 0); + port3_wr_full : in std_logic; + port3_wr_count : in std_logic_vector(BITS downto 0); + + max_read : in std_logic_vector(2 downto 0); + max_write : in std_logic_vector(2 downto 0); + + interrupt : out std_logic; + interrupt_rdy : in std_logic; + + mdio_command : out std_logic_vector(0 to 27); + mdio_data : in std_logic_vector(0 to 15); + mdio_enable : out std_logic; + mdio_done : in std_logic; + + leds : out std_logic_vector(2 downto 0) +); +end dma; + +architecture arch of dma is + type state_t is (state_idle, state_tx_read, state_tx_write, state_tx_complete, state_rx_complete, + state_dma_read, state_dma_write, state_interrupt, state_command, + state_test_write_head, state_test_write, + state_test_read_head, state_test_read, state_test_complete, + state_mdio); + signal state : state_t; + + signal fifo_read : std_logic; + signal fifo_write : std_logic; + signal fifo_din : std_logic_vector(63 downto 0); + signal fifo_dout : std_logic_vector(63 downto 0); + signal fifo_full : std_logic; + signal fifo_empty : std_logic; + signal fifo_count : std_logic_vector(BITS downto 0); + + component simple_fifo port ( + clk : in std_logic; + rst : in std_logic; + rd_en : in std_logic; + wr_en : in std_logic; + din : in std_logic_vector(63 downto 0); + dout : out std_logic_vector(63 downto 0); + full : out std_logic; + empty : out std_logic; + data_count : out std_logic_vector(BITS downto 0) + ); + end component; + + signal cmd_read : std_logic; + signal cmd_write : std_logic; + signal cmd_din : std_logic_vector(63 downto 0); + signal cmd_dout : std_logic_vector(63 downto 0); + signal cmd_full : std_logic; + signal cmd_empty : std_logic; + + component cmd_fifo port ( + clk : in std_logic; + rst : in std_logic; + rd_en : in std_logic; + wr_en : in std_logic; + din : in std_logic_vector(63 downto 0); + dout : out std_logic_vector(63 downto 0); + full : out std_logic; + empty : out std_logic + ); + end component; + + signal test_completion : std_logic_vector(63 downto 0); +begin + process (clk, reset) + variable bar_addr : unsigned(BITS downto 0); + variable dma_addr : unsigned(28 downto 0); + variable length : unsigned(BITS downto 0); + variable remain : unsigned(BITS downto 0); + variable cycles : unsigned(BITS downto 0); + variable backup_addr : unsigned(28 downto 0); + variable backup_length : unsigned(BITS downto 0); + begin + if reset = '1' then + state <= state_idle; + tx_read <= '0'; + tx_write <= '0'; + tx_complete <= '0'; + tx_data <= (others => '0'); + tx_address <= (others => '0'); + tx_length <= (others => '0'); + fifo_read <= '0'; + fifo_write <= '0'; + fifo_din <= (others => '0'); + interrupt <= '0'; + cmd_read <= '0'; + cmd_write <= '0'; + cmd_din <= (others => '0'); + test_completion <= (others => '0'); + port0_read <= '0'; + port0_write <= '0'; + port0_wr_data <= (others => '0'); + port1_read <= '0'; + port1_write <= '0'; + port1_wr_data <= (others => '0'); + port2_read <= '0'; + port2_write <= '0'; + port2_wr_data <= (others => '0'); + port3_read <= '0'; + port3_write <= '0'; + port3_wr_data <= (others => '0'); + mdio_enable <= '0'; + mdio_command <= (others => '0'); + + elsif rising_edge(clk) then + fifo_read <= '0'; + fifo_write <= '0'; + fifo_din <= (others => '0'); + cmd_read <= '0'; + cmd_write <= '0'; + cmd_din <= (others => '0'); + port0_read <= '0'; + port0_write <= '0'; + port1_read <= '0'; + port1_write <= '0'; + port2_read <= '0'; + port2_write <= '0'; + port3_read <= '0'; + port3_write <= '0'; + + -- bar read + if state = state_idle and rx_read = '1' then + state <= state_tx_complete; + tx_complete <= '1'; + tx_data <= (others => '0'); + tx_address <= rx_address; + bar_addr := unsigned(rx_address(BITS downto 0)); + + -- read fifo + if bar_addr = 0 then + if fifo_empty = '1' then + tx_data <= (others => '1'); + else + tx_data <= fifo_dout; + fifo_read <= '1'; + end if; + + -- read command + elsif bar_addr = 1 then + if cmd_empty = '1' then + tx_data <= (others => '1'); + else + tx_data <= cmd_dout; + cmd_read <= '1'; + end if; + + -- other + elsif bar_addr = 3 then + tx_data(BITS downto 0) <= fifo_count; + + elsif bar_addr = 4 then + tx_data(2 downto 0) <= max_read; + + elsif bar_addr = 5 then + tx_data(2 downto 0) <= max_write; + + elsif bar_addr = 6 then + tx_data <= test_completion; + + -- read ports + elsif bar_addr = 10 then + if port0_rd_empty = '1' then + tx_data <= (others => '1'); + else + tx_data <= port0_rd_data; + port0_read <= '1'; + end if; + + elsif bar_addr = 11 then + if port1_rd_empty = '1' then + tx_data <= (others => '1'); + else + tx_data <= port1_rd_data; + port1_read <= '1'; + end if; + + elsif bar_addr = 12 then + if port2_rd_empty = '1' then + tx_data <= (others => '1'); + else + tx_data <= port2_rd_data; + port2_read <= '1'; + end if; + + elsif bar_addr = 13 then + if port3_rd_empty = '1' then + tx_data <= (others => '1'); + else + tx_data <= port3_rd_data; + port3_read <= '1'; + end if; + + -- read counts + elsif bar_addr = 20 then + tx_data(BITS downto 0) <= port0_rd_count; + + elsif bar_addr = 21 then + tx_data(BITS downto 0) <= port0_wr_count; + + elsif bar_addr = 22 then + tx_data(BITS downto 0) <= port1_rd_count; + + elsif bar_addr = 23 then + tx_data(BITS downto 0) <= port1_wr_count; + + elsif bar_addr = 24 then + tx_data(BITS downto 0) <= port2_rd_count; + + elsif bar_addr = 25 then + tx_data(BITS downto 0) <= port2_wr_count; + + elsif bar_addr = 26 then + tx_data(BITS downto 0) <= port3_rd_count; + + elsif bar_addr = 27 then + tx_data(BITS downto 0) <= port3_wr_count; + + -- read mdio + elsif bar_addr = 30 then + tx_data(15 downto 0) <= mdio_data; + end if; + + elsif state = state_tx_complete then + if tx_done = '1' then + state <= state_idle; + end if; + + -- bar write + elsif state = state_idle and rx_write = '1' then + bar_addr := unsigned(rx_address(BITS downto 0)); + + -- write fifo + if bar_addr = 0 then + if fifo_full = '0' then + fifo_din <= rx_data; + fifo_write <= '1'; + end if; + + -- write command + elsif bar_addr = 1 then + if cmd_full = '0' then + cmd_din <= rx_data; + cmd_write <= '1'; + end if; + + if rx_data(0) = '1' then + state <= state_command; + end if; + + -- write test + elsif bar_addr = 2 then + dma_addr := unsigned(rx_data(31 downto 3)); + length := unsigned(rx_data(BITS+32 downto 32)); + cycles := unsigned(rx_data(BITS+48 downto 48)); + backup_addr := dma_addr; + backup_length := length; + + if rx_data(1) = '0' then + state <= state_test_read_head; + else + state <= state_test_write_head; + end if; + + -- write ports + elsif bar_addr = 10 then + if port0_wr_full = '0' then + port0_wr_data <= rx_data; + port0_write <= '1'; + end if; + + elsif bar_addr = 11 then + if port1_wr_full = '0' then + port1_wr_data <= rx_data; + port1_write <= '1'; + end if; + + elsif bar_addr = 12 then + if port2_wr_full = '0' then + port2_wr_data <= rx_data; + port2_write <= '1'; + end if; + + elsif bar_addr = 13 then + if port3_wr_full = '0' then + port3_wr_data <= rx_data; + port3_write <= '1'; + end if; + + -- write mdio + elsif bar_addr = 30 then + state <= state_mdio; + mdio_enable <= '1'; + mdio_command <= rx_data(27 downto 0); + end if; + + -- mdio + elsif state = state_mdio then + if mdio_done = '1' then + mdio_enable <= '0'; + state <= state_interrupt; + interrupt <= '1'; + end if; + + -- test read + elsif state = state_test_read_head then + remain := 16 - resize(dma_addr(3 downto 0), remain'length); + + if max_read = "001" then + remain := 32 - resize(dma_addr(4 downto 0), remain'length); + elsif max_read = "010" then + remain := 64 - resize(dma_addr(5 downto 0), remain'length); + elsif max_read = "011" then + remain := 128 - resize(dma_addr(6 downto 0), remain'length); + elsif max_read = "100" then + remain := 256 - resize(dma_addr(7 downto 0), remain'length); + elsif max_read = "101" then + remain := 512 - resize(dma_addr(8 downto 0), remain'length); + end if; + + if remain > length then + remain := length; + end if; + + state <= state_test_read; + tx_read <= '1'; + tx_address <= std_logic_vector(dma_addr); + tx_length <= std_logic_vector(remain(8 downto 0)); + length := length - remain; + dma_addr := dma_addr + remain; + + elsif state = state_test_read then + if tx_done = '1' then + state <= state_test_complete; + end if; + + elsif state = state_test_complete then + if rx_complete = '1' then + test_completion <= rx_data; + remain := remain - 1; + + if remain = 0 then + if length > 0 then + state <= state_test_read_head; + + elsif cycles > 1 then + state <= state_test_read_head; + dma_addr := backup_addr; + length := backup_length; + cycles := cycles - 1; + else + state <= state_interrupt; + interrupt <= '1'; + end if; + end if; + end if; + + -- test write + elsif state = state_test_write_head then + remain := 16 - resize(dma_addr(3 downto 0), remain'length); + + if max_write = "001" then + remain := 32 - resize(dma_addr(4 downto 0), remain'length); + elsif max_write = "010" then + remain := 64 - resize(dma_addr(5 downto 0), remain'length); + elsif max_write = "011" then + remain := 128 - resize(dma_addr(6 downto 0), remain'length); + elsif max_write = "100" then + remain := 256 - resize(dma_addr(7 downto 0), remain'length); + elsif max_write = "101" then + remain := 512 - resize(dma_addr(8 downto 0), remain'length); + end if; + + if remain > length then + remain := length; + end if; + + state <= state_test_write; + tx_write <= '1'; + tx_data <= x"FFEEDDCC00000000"; + tx_address <= std_logic_vector(dma_addr); + tx_length <= std_logic_vector(remain(8 downto 0)); + length := length - remain; + dma_addr := dma_addr + remain; + + elsif state = state_test_write then + if tx_done = '1' then + if length > 0 then + state <= state_test_write_head; + + elsif cycles > 1 then + state <= state_test_write_head; + dma_addr := backup_addr; + length := backup_length; + cycles := cycles - 1; + else + state <= state_interrupt; + interrupt <= '1'; + end if; + end if; + + -- command + elsif state = state_command then + if cmd_empty = '1' then + state <= state_interrupt; + interrupt <= '1'; + else + cmd_read <= '1'; + + if cmd_dout(1) = '0' then + state <= state_dma_read; + dma_addr := unsigned(cmd_dout(31 downto 3)); + length := unsigned(cmd_dout(BITS+32 downto 32)); + fifo_din <= std_logic_vector(resize(length, fifo_din'length)); + fifo_write <= '1'; + else + state <= state_dma_write; + dma_addr := unsigned(cmd_dout(31 downto 3)); + length := unsigned(fifo_dout(BITS downto 0)) + 1; + end if; + end if; + + elsif state = state_interrupt then + if interrupt_rdy = '1' then + state <= state_idle; + interrupt <= '0'; + end if; + + -- dma read + elsif state = state_dma_read then + remain := 16 - resize(dma_addr(3 downto 0), remain'length); + + if max_read = "001" then + remain := 32 - resize(dma_addr(4 downto 0), remain'length); + elsif max_read = "010" then + remain := 64 - resize(dma_addr(5 downto 0), remain'length); + elsif max_read = "011" then + remain := 128 - resize(dma_addr(6 downto 0), remain'length); + elsif max_read = "100" then + remain := 256 - resize(dma_addr(7 downto 0), remain'length); + elsif max_read = "101" then + remain := 512 - resize(dma_addr(8 downto 0), remain'length); + end if; + + if remain > length then + remain := length; + end if; + + state <= state_tx_read; + tx_read <= '1'; + tx_address <= std_logic_vector(dma_addr); + tx_length <= std_logic_vector(remain(8 downto 0)); + length := length - remain; + dma_addr := dma_addr + remain; + + elsif state = state_tx_read then + if tx_done = '1' then + state <= state_rx_complete; + end if; + + elsif state = state_rx_complete then + if rx_complete = '1' then + fifo_din <= rx_data; + fifo_write <= '1'; + remain := remain - 1; + + if remain = 0 then + if length > 0 then + state <= state_dma_read; + else + state <= state_command; + end if; + end if; + end if; + + -- dma write + elsif state = state_dma_write then + remain := 16 - resize(dma_addr(3 downto 0), remain'length); + + if max_write = "001" then + remain := 32 - resize(dma_addr(4 downto 0), remain'length); + elsif max_write = "010" then + remain := 64 - resize(dma_addr(5 downto 0), remain'length); + elsif max_write = "011" then + remain := 128 - resize(dma_addr(6 downto 0), remain'length); + elsif max_write = "100" then + remain := 256 - resize(dma_addr(7 downto 0), remain'length); + elsif max_write = "101" then + remain := 512 - resize(dma_addr(8 downto 0), remain'length); + end if; + + if remain > length then + remain := length; + end if; + + state <= state_tx_write; + tx_write <= '1'; + tx_data <= fifo_dout; + tx_address <= std_logic_vector(dma_addr); + tx_length <= std_logic_vector(remain(8 downto 0)); + fifo_read <= '1'; + length := length - remain; + dma_addr := dma_addr + remain; + remain := remain - 1; + + elsif state = state_tx_write then + if tx_done = '1' then + if length > 0 then + state <= state_dma_write; + else + state <= state_command; + end if; + + elsif tx_accept = '1' and remain > 0 then + tx_data <= fifo_dout; + fifo_read <= '1'; + remain := remain - 1; + end if; + end if; + + if tx_done = '1' then + tx_read <= '0'; + tx_write <= '0'; + tx_complete <= '0'; + tx_data <= (others => '0'); + tx_address <= (others => '0'); + tx_length <= (others => '0'); + end if; + end if; + end process; + + fifo : entity work.port_fifo port map ( + reset => reset, + + rd_clk => clk, + rd_read => fifo_read, + rd_data => fifo_dout, + rd_empty => fifo_empty, + rd_count => fifo_count, + + wr_write => fifo_write, + wr_data => fifo_din, + wr_full => fifo_full + --wr_count => wr_count + ); + + commands : cmd_fifo port map ( + clk => clk, + rst => reset, + rd_en => cmd_read, + wr_en => cmd_write, + din => cmd_din, + dout => cmd_dout, + full => cmd_full, + empty => cmd_empty + ); + + leds <= "000" when state = state_idle else + -- bar read + "001" when state = state_tx_complete else + -- dma read + "010" when state = state_dma_read or state = state_tx_read or state = state_rx_complete else + -- dma write + "011" when state = state_dma_write or state = state_tx_write else + -- mdio + "100" when state = state_mdio else + -- interrupt + "101" when state = state_interrupt else + -- other + "111"; +end arch; + diff --git a/netfpga10g/hdl/engine.vhd b/netfpga10g/hdl/engine.vhd new file mode 100644 index 0000000..16f0a8b --- /dev/null +++ b/netfpga10g/hdl/engine.vhd @@ -0,0 +1,570 @@ + +library IEEE; +use IEEE.STD_LOGIC_1164.ALL; +use IEEE.NUMERIC_STD.ALL; +library UNISIM; +use UNISIM.VComponents.all; + +entity engine is +generic ( + BUFF_COUNT : integer := 16; + BUFF_BITS : integer := 4; -- 2^4 = 16 + BAR_BITS : integer := 17; + TIME_BITS : integer := 20 +); +port ( + clk : in STD_LOGIC; + + rd_buff : out STD_LOGIC_VECTOR (BUFF_BITS - 1 downto 0) := (others => '0'); + rd_en : out STD_LOGIC := '0'; + rd_data : in STD_LOGIC_VECTOR (63 downto 0); + rd_length : in STD_LOGIC_VECTOR (8 downto 0); + rd_valid : in STD_LOGIC_VECTOR (BUFF_COUNT - 1 downto 0); + + wr_buff : out STD_LOGIC_VECTOR (BUFF_BITS - 1 downto 0) := (others => '0'); + wr_en : out STD_LOGIC := '0'; + wr_data : out STD_LOGIC_VECTOR (63 downto 0) := (others => '0'); + wr_done : out STD_LOGIC := '0'; + wr_cancel : out STD_LOGIC_VECTOR (BUFF_COUNT - 1 downto 0); + wr_accept : in STD_LOGIC_VECTOR (BUFF_COUNT - 1 downto 0); + + rx_read : in STD_LOGIC; + rx_write : in STD_LOGIC; + rx_complete : in STD_LOGIC; + rx_data : in STD_LOGIC_VECTOR (63 downto 0); + rx_address : in STD_LOGIC_VECTOR (63 downto 3); + rx_tag : in std_logic_vector(4 downto 0); + + tx_read : out STD_LOGIC := '0'; + tx_write : out STD_LOGIC := '0'; + tx_complete : out STD_LOGIC := '0'; + tx_data : out STD_LOGIC_VECTOR (63 downto 0) := (others => '0'); + tx_address : out STD_LOGIC_VECTOR (63 downto 3) := (others => '0'); + tx_length : out STD_LOGIC_VECTOR (8 downto 0) := (others => '0'); + tx_tag : out std_logic_vector(4 downto 0) := (others => '0'); + tx_accept : in STD_LOGIC; + tx_done : in STD_LOGIC; + + interrupt : out std_logic := '0'; + interrupt_rdy : in std_logic; + + max_read : in std_logic_vector(2 downto 0); + max_write : in std_logic_vector(2 downto 0); + + mdio_command : out std_logic_vector(0 to 27) := (others => '0'); + mdio_data : in std_logic_vector(0 to 15); + mdio_enable : out std_logic := '0'; + mdio_done : in std_logic +); +end engine; + +architecture arch of engine is + + constant BUFF_EMPTY : std_logic_vector(1 downto 0) := "00"; + constant BUFF_ADDR : std_logic_vector(1 downto 0) := "01"; + constant BUFF_DATA : std_logic_vector(1 downto 0) := "10"; + constant BUFF_FULL : std_logic_vector(1 downto 0) := "11"; + + type buff_t is array (0 to BUFF_COUNT - 1) of std_logic_vector(1 downto 0); + type length_t is array (0 to BUFF_COUNT - 1) of unsigned(8 downto 0); + type address_t is array (0 to BUFF_COUNT - 1) of unsigned(63 downto 3); + type time_t is array (0 to BUFF_COUNT - 1) of unsigned(TIME_BITS - 1 downto 0); + + type rx_state_t is (rx_state_idle, rx_state_write_done, rx_state_mdio); + type tx_state_t is (tx_state_idle, tx_state_read, tx_state_write, + tx_state_complete, tx_state_interrupt); + + signal rx_state : rx_state_t := rx_state_idle; + signal tx_state : tx_state_t := tx_state_idle; + + signal tx_data_i : std_logic_vector(63 downto 0) := (others => '0'); + + constant CMD_STATUS : std_logic_vector(1 downto 0) := "00"; + constant CMD_SEND : std_logic_vector(1 downto 0) := "01"; + constant CMD_RECV : std_logic_vector(1 downto 0) := "10"; + constant CMD_MDIO : std_logic_vector(1 downto 0) := "11"; + + signal send_buff : buff_t := (others => BUFF_FULL); + signal send_length : length_t := (others => (others => '0')); + signal send_remain : length_t := (others => (others => '0')); + signal send_address : address_t := (others => (others => '0')); + signal send_read_time : time_t := (others => (others => '0')); + + signal recv_buff : buff_t := (others => BUFF_EMPTY); + signal recv_address0 : unsigned(63 downto 3); + signal recv_address1 : unsigned(63 downto 3); + signal recv_address2 : unsigned(63 downto 3); + signal recv_address3 : unsigned(63 downto 3); + signal recv_address4 : unsigned(63 downto 3); + signal recv_address5 : unsigned(63 downto 3); + signal recv_address6 : unsigned(63 downto 3); + signal recv_address7 : unsigned(63 downto 3); + signal recv_address8 : unsigned(63 downto 3); + signal recv_address9 : unsigned(63 downto 3); + signal recv_address10 : unsigned(63 downto 3); + signal recv_address11 : unsigned(63 downto 3); + signal recv_address12 : unsigned(63 downto 3); + signal recv_address13 : unsigned(63 downto 3); + signal recv_address14 : unsigned(63 downto 3); + signal recv_address15 : unsigned(63 downto 3); + + signal send_int : std_logic := '0'; + signal send_int_needed : std_logic := '0'; + signal send_read : std_logic := '0'; + signal send_read_done : std_logic := '0'; + signal send_read_buff : integer range 0 to BUFF_COUNT - 1 := 0; + signal send_read_length : unsigned(8 downto 0); + signal send_read_remain : unsigned(8 downto 0); + signal send_read_address : unsigned(63 downto 3); + signal send_write : std_logic := '0'; + signal send_write_new : std_logic := '0'; + signal send_write_buff : integer range 0 to BUFF_COUNT - 1 := 0; + signal send_write_length : unsigned(8 downto 0); + signal send_write_address : unsigned(63 downto 3); + + signal debug_address : std_logic_vector(63 downto 3) := (others => '0'); + signal debug_data : std_logic_vector(63 downto 0) := (others => '0'); + signal debug_cmd : std_logic_vector(1 downto 0) := (others => '0'); + signal debug_buff : std_logic_vector(BUFF_BITS - 1 downto 0) := (others => '0'); + signal debug_length : std_logic_vector(8 downto 0) := std_logic_vector(to_unsigned(42, 9)); + + signal debug_cmpl_count : unsigned(7 downto 0) := (others => '0'); + signal debug_cmpl_data : std_logic_vector(63 downto 0) := (others => '0'); + signal debug_cmpl_tag : std_logic_vector(4 downto 0) := (others => '0'); + signal debug_cmpl_state : std_logic_vector(7 downto 0) := x"FF"; + + signal debug_write_count : unsigned(7 downto 0) := (others => '0'); + signal debug_write_length : std_logic_vector(8 downto 0) := (others => '0'); + signal debug_write_addr : std_logic_vector(63 downto 3) := (others => '0'); + signal debug_write_data : std_logic_vector(63 downto 0) := (others => '0'); + + signal debug_accept_count : unsigned(7 downto 0) := (others => '0'); + signal debug_done_count : unsigned(7 downto 0) := (others => '0'); + + signal timer : unsigned(TIME_BITS - 1 downto 0) := (others => '0'); +begin + rd_en <= tx_accept when tx_state = tx_state_write else '0'; + + tx_data <= rd_data when tx_state = tx_state_write else tx_data_i; + + process (clk) + variable bar_read : std_logic := '0'; + variable bar_read_address : std_logic_vector(63 downto 3) := (others => '0'); + + variable tmp_cmd : std_logic_vector(1 downto 0); + variable tmp_buff : integer range 0 to BUFF_COUNT - 1; + variable tmp_length : unsigned(8 downto 0); + variable tmp_remain : unsigned(8 downto 0); + variable tmp_address : unsigned(63 downto 3); + variable tmp_bar : unsigned(BAR_BITS - 1 downto 0); + + -- see 'metered reads' in pcie core manual (xilinx) + -- a maximum of 8 openstanding reads is allowed + constant READ_MAX : unsigned(3 downto 0) := x"8"; + variable read_count : unsigned(3 downto 0) := (others => '0'); + variable read_decr : std_logic; + variable read_incr : std_logic; + begin + if rising_edge(clk) then + wr_en <= '0'; + wr_data <= (others => '0'); + wr_done <= '0'; + wr_cancel <= (others => '0'); + read_decr := '0'; + read_incr := '0'; + + timer <= timer + 1; + + -- ENGINE: RX + if rx_state = rx_state_idle then + if rx_read = '1' then + bar_read := '1'; + bar_read_address := rx_address; + + elsif rx_write = '1' then + tmp_cmd := rx_address(4 downto 3); + tmp_buff := to_integer(unsigned(rx_address(5 + BUFF_BITS - 1 downto 5))); + tmp_length := unsigned(rx_address(18 downto 10)); + tmp_address := unsigned(rx_data(63 downto 3)); + + debug_address <= rx_address; + debug_data <= rx_data; + debug_cmd <= tmp_cmd; + debug_buff <= std_logic_vector(to_unsigned(tmp_buff, debug_buff'length)); + debug_length <= std_logic_vector(tmp_length); + + if tmp_cmd = CMD_SEND then + if send_buff(tmp_buff) = BUFF_EMPTY then + send_buff(tmp_buff) <= BUFF_ADDR; + send_address(tmp_buff) <= tmp_address; + send_length(tmp_buff) <= tmp_length; + end if; + + elsif tmp_cmd = CMD_RECV then + if recv_buff(tmp_buff) = BUFF_FULL then + recv_buff(tmp_buff) <= BUFF_ADDR; + + if tmp_buff = 0 then + recv_address0 <= tmp_address; + elsif tmp_buff = 1 then + recv_address1 <= tmp_address; + elsif tmp_buff = 2 then + recv_address2 <= tmp_address; + elsif tmp_buff = 3 then + recv_address3 <= tmp_address; + elsif tmp_buff = 4 then + recv_address4 <= tmp_address; + elsif tmp_buff = 5 then + recv_address5 <= tmp_address; + elsif tmp_buff = 6 then + recv_address6 <= tmp_address; + elsif tmp_buff = 7 then + recv_address7 <= tmp_address; + elsif tmp_buff = 8 then + recv_address8 <= tmp_address; + elsif tmp_buff = 9 then + recv_address9 <= tmp_address; + elsif tmp_buff = 10 then + recv_address10 <= tmp_address; + elsif tmp_buff = 11 then + recv_address11 <= tmp_address; + elsif tmp_buff = 12 then + recv_address12 <= tmp_address; + elsif tmp_buff = 13 then + recv_address13 <= tmp_address; + elsif tmp_buff = 14 then + recv_address14 <= tmp_address; + elsif tmp_buff = 15 then + recv_address15 <= tmp_address; + end if; + end if; + + elsif tmp_cmd = CMD_MDIO then + rx_state <= rx_state_mdio; + mdio_enable <= '1'; + mdio_command <= rx_data(27 downto 0); + end if; + + elsif rx_complete = '1' then + tmp_buff := to_integer(unsigned(rx_tag(BUFF_BITS - 1 downto 0))); + + debug_cmpl_count <= debug_cmpl_count + 1; + debug_cmpl_data <= rx_data; + debug_cmpl_tag <= rx_tag; + debug_cmpl_state <= x"00"; + + if send_buff(tmp_buff) = BUFF_DATA then + wr_en <= '1'; + wr_data <= rx_data; + wr_buff <= std_logic_vector(to_unsigned(tmp_buff, BUFF_BITS)); + send_remain(tmp_buff) <= send_remain(tmp_buff) - 1; + debug_cmpl_state <= x"01"; + + if send_remain(tmp_buff) = 1 then + read_decr := '1'; + + if send_length(tmp_buff) = 0 then + rx_state <= rx_state_write_done; + debug_cmpl_state <= x"02"; + else + send_buff(tmp_buff) <= BUFF_ADDR; + debug_cmpl_state <= x"03"; + end if; + end if; + end if; + end if; + + elsif rx_state = rx_state_write_done then + rx_state <= rx_state_idle; + wr_done <= '1'; + + elsif rx_state = rx_state_mdio then + if mdio_done = '1' then + rx_state <= rx_state_idle; + mdio_enable <= '0'; + end if; + end if; + + -- ENGINE: TX + if send_read_done = '1' then + send_read_done <= '0'; + send_buff(send_read_buff) <= BUFF_DATA; + send_length(send_read_buff) <= send_read_length - send_read_remain; + send_remain(send_read_buff) <= send_read_remain; + send_address(send_read_buff) <= send_read_address + send_read_remain; + send_read_time(send_read_buff) <= timer; + end if; + + if tx_state = tx_state_idle or + (tx_state = tx_state_read and tx_done = '1') or + (tx_state = tx_state_write and tx_done = '1') or + (tx_state = tx_state_complete and tx_done = '1') or + (tx_state = tx_state_interrupt and interrupt_rdy = '1') then + + tx_state <= tx_state_idle; + tx_read <= '0'; + tx_write <= '0'; + tx_complete <= '0'; + tx_data_i <= (others => '0'); + tx_address <= (others => '0'); + tx_length <= (others => '0'); + tx_tag <= (others => '0'); + interrupt <= '0'; + + if bar_read = '1' then + tx_state <= tx_state_complete; + tx_complete <= '1'; + tx_address <= bar_read_address; + tmp_cmd := bar_read_address(4 downto 3); + tmp_bar := unsigned(bar_read_address(3 + BAR_BITS - 1 downto 3)); + bar_read := '0'; + + if tmp_bar = 0 then + --if tmp_cmd = CMD_STATUS then + for i in 0 to BUFF_COUNT - 1 loop + tx_data_i(i*4 + 1 downto i*4 + 0) <= send_buff(i); + tx_data_i(i*4 + 3 downto i*4 + 2) <= recv_buff(i); + end loop; + send_int <= '0'; + send_int_needed <= '1'; + + elsif tmp_bar = 1 then + tx_data_i(63 downto 3) <= debug_address; + + elsif tmp_bar = 2 then + tx_data_i <= debug_data; + + elsif tmp_bar = 3 then + tx_data_i(1 downto 0) <= debug_cmd; + + elsif tmp_bar = 4 then + tx_data_i(BUFF_BITS - 1 downto 0) <= debug_buff; + + elsif tmp_bar = 5 then + tx_data_i(8 downto 0) <= debug_length; + + elsif tmp_bar = 10 then + tx_data_i(7 downto 0) <= std_logic_vector(debug_cmpl_count); + + elsif tmp_bar = 11 then + tx_data_i <= debug_cmpl_data; + + elsif tmp_bar = 12 then + tx_data_i(4 downto 0) <= debug_cmpl_tag; + + elsif tmp_bar = 13 then + tx_data_i(7 downto 0) <= debug_cmpl_state; + + elsif tmp_bar = 20 then + tx_data_i(7 downto 0) <= std_logic_vector(debug_write_count); + + elsif tmp_bar = 21 then + tx_data_i(8 downto 0) <= debug_write_length; + + elsif tmp_bar = 22 then + tx_data_i(63 downto 3) <= debug_write_addr; + + elsif tmp_bar = 23 then + tx_data_i(63 downto 0) <= debug_write_data; + + elsif tmp_bar = 24 then + tx_data_i(7 downto 0) <= std_logic_vector(debug_accept_count); + + elsif tmp_bar = 25 then + tx_data_i(7 downto 0) <= std_logic_vector(debug_done_count); + + elsif tmp_bar = 30 then + tx_data_i(15 downto 0) <= mdio_data; + + else + tx_data_i(63 downto 3) <= bar_read_address; + end if; + + elsif send_int = '1' and send_int_needed = '1' then + tx_state <= tx_state_interrupt; + interrupt <= '1'; + send_int_needed <= '0'; + + elsif send_read = '1' and read_count < READ_MAX then + tmp_buff := send_read_buff; + tmp_length := send_read_length; + tmp_address := send_read_address; + tmp_remain := 16 - resize(tmp_address(6 downto 3), tmp_remain'length); + + if max_read = "001" then + tmp_remain := 32 - resize(tmp_address(7 downto 3), tmp_remain'length); + elsif max_read = "010" then + tmp_remain := 64 - resize(tmp_address(8 downto 3), tmp_remain'length); + elsif max_read = "011" then + tmp_remain := 128 - resize(tmp_address(9 downto 3), tmp_remain'length); + elsif max_read = "100" then + tmp_remain := 256 - resize(tmp_address(10 downto 3), tmp_remain'length); + elsif max_read = "101" then + tmp_remain := 512 - resize(tmp_address(11 downto 3), tmp_remain'length); + end if; + + if tmp_remain > tmp_length then + tmp_remain := tmp_length; + end if; + + tx_state <= tx_state_read; + tx_read <= '1'; + tx_address <= std_logic_vector(tmp_address); + tx_length <= std_logic_vector(tmp_remain); + tx_tag <= std_logic_vector(to_unsigned(tmp_buff, tx_tag'length)); + + send_read <= '0'; + send_read_done <= '1'; + send_read_remain <= tmp_remain; + read_incr := '1'; + + elsif send_write = '1' then + if send_write_new = '1' then + tmp_length := unsigned(rd_length); + else + tmp_length := send_write_length; + end if; + tmp_address := send_write_address; + tmp_remain := 16 - resize(tmp_address(6 downto 3), tmp_remain'length); + + if max_write = "001" then + tmp_remain := 32 - resize(tmp_address(7 downto 3), tmp_remain'length); + elsif max_write = "010" then + tmp_remain := 64 - resize(tmp_address(8 downto 3), tmp_remain'length); + elsif max_write = "011" then + tmp_remain := 128 - resize(tmp_address(9 downto 3), tmp_remain'length); + elsif max_write = "100" then + tmp_remain := 256 - resize(tmp_address(10 downto 3), tmp_remain'length); + elsif max_write = "101" then + tmp_remain := 512 - resize(tmp_address(11 downto 3), tmp_remain'length); + end if; + + if tmp_remain > tmp_length then + tmp_remain := tmp_length; + end if; + + tx_state <= tx_state_write; + tx_write <= '1'; + tx_address <= std_logic_vector(tmp_address); + tx_length <= std_logic_vector(tmp_remain); + + debug_write_count <= debug_write_count + 1; + debug_write_length <= std_logic_vector(tmp_remain); + debug_write_addr <= std_logic_vector(tmp_address); + debug_write_data <= rd_data; + + tmp_length := tmp_length - tmp_remain; + tmp_address := tmp_address + tmp_remain; + + send_write_length <= tmp_length; + send_write_address <= tmp_address; + send_write_new <= '0'; + + if tmp_length = 0 then + send_write <= '0'; + end if; + end if; + end if; + + if read_decr = '1' and read_incr = '0' then + read_count := read_count - 1; + elsif read_decr = '0' and read_incr = '1' then + read_count := read_count + 1; + end if; + + if tx_accept = '1' then + debug_accept_count <= debug_accept_count + 1; + end if; + if tx_done = '1' then + debug_done_count <= debug_done_count + 1; + end if; + + for i in 0 to BUFF_COUNT - 1 loop + if send_buff(i) = BUFF_DATA and wr_accept(i) = '0' then + send_buff(i) <= BUFF_FULL; + -- no send_int here + end if; + if send_buff(i) = BUFF_FULL and wr_accept(i) = '1' then + send_buff(i) <= BUFF_EMPTY; + send_int <= '1'; + end if; + if recv_buff(i) = BUFF_EMPTY and rd_valid(i) = '1' then + recv_buff(i) <= BUFF_FULL; + send_int <= '1'; + end if; + if recv_buff(i) = BUFF_DATA and rd_valid(i) = '0' then + recv_buff(i) <= BUFF_EMPTY; + send_int <= '1'; + end if; + + if send_buff(i) = BUFF_DATA and send_read_time(i) = timer then + -- read timeout + wr_cancel(i) <= '1'; + end if; + end loop; + + if send_read = '0' and send_read_done = '0' then + for i in 0 to BUFF_COUNT - 1 loop + tmp_buff := (send_read_buff + i) mod BUFF_COUNT; + + if send_buff(tmp_buff) = BUFF_ADDR then + send_read <= '1'; + send_read_buff <= tmp_buff; + send_read_length <= send_length(tmp_buff); + send_read_address <= send_address(tmp_buff); + exit; + end if; + end loop; + end if; + + if send_write = '0' and (tx_state /= tx_state_write or tx_done = '1') then + for i in 0 to BUFF_COUNT - 1 loop + tmp_buff := (send_write_buff + i) mod BUFF_COUNT; + + if recv_buff(tmp_buff) = BUFF_ADDR then + recv_buff(tmp_buff) <= BUFF_DATA; + send_write <= '1'; + send_write_new <= '1'; + send_write_buff <= tmp_buff; + rd_buff <= std_logic_vector(to_unsigned(tmp_buff, BUFF_BITS)); + + if tmp_buff = 0 then + send_write_address <= recv_address0; + elsif tmp_buff = 1 then + send_write_address <= recv_address1; + elsif tmp_buff = 2 then + send_write_address <= recv_address2; + elsif tmp_buff = 3 then + send_write_address <= recv_address3; + elsif tmp_buff = 4 then + send_write_address <= recv_address4; + elsif tmp_buff = 5 then + send_write_address <= recv_address5; + elsif tmp_buff = 6 then + send_write_address <= recv_address6; + elsif tmp_buff = 7 then + send_write_address <= recv_address7; + elsif tmp_buff = 8 then + send_write_address <= recv_address8; + elsif tmp_buff = 9 then + send_write_address <= recv_address9; + elsif tmp_buff = 10 then + send_write_address <= recv_address10; + elsif tmp_buff = 11 then + send_write_address <= recv_address11; + elsif tmp_buff = 12 then + send_write_address <= recv_address12; + elsif tmp_buff = 13 then + send_write_address <= recv_address13; + elsif tmp_buff = 14 then + send_write_address <= recv_address14; + elsif tmp_buff = 15 then + send_write_address <= recv_address15; + end if; + exit; + end if; + end loop; + end if; + end if; + end process; +end arch; diff --git a/netfpga10g/hdl/eth.vhd b/netfpga10g/hdl/eth.vhd new file mode 100644 index 0000000..8034ceb --- /dev/null +++ b/netfpga10g/hdl/eth.vhd @@ -0,0 +1,219 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity eth is +generic ( + BITS : integer := 14; + REVERSE_LANES : std_logic := '0' +); +port ( + clk : in std_logic; + reset : in std_logic; + clk156_out : out std_logic; + + read : out std_logic; + rd_data : in std_logic_vector(63 downto 0); + rd_empty : in std_logic; + rd_count : in std_logic_vector(BITS downto 0); + + write : out std_logic; + wr_data : out std_logic_vector(63 downto 0); + wr_full : in std_logic; + wr_count : in std_logic_vector(BITS downto 0); + + xaui_clk_p : in std_logic; + xaui_clk_n : in std_logic; + xaui_dclk : in std_logic; + xaui_tx_l0_p : out std_logic; + xaui_tx_l0_n : out std_logic; + xaui_tx_l1_p : out std_logic; + xaui_tx_l1_n : out std_logic; + xaui_tx_l2_p : out std_logic; + xaui_tx_l2_n : out std_logic; + xaui_tx_l3_p : out std_logic; + xaui_tx_l3_n : out std_logic; + xaui_rx_l0_p : in std_logic; + xaui_rx_l0_n : in std_logic; + xaui_rx_l1_p : in std_logic; + xaui_rx_l1_n : in std_logic; + xaui_rx_l2_p : in std_logic; + xaui_rx_l2_n : in std_logic; + xaui_rx_l3_p : in std_logic; + xaui_rx_l3_n : in std_logic +); +end eth; + +architecture arch of eth is + type state_t is (state_idle, state_length, state_data, state_end); + + signal xgmii_txd : std_logic_vector(63 downto 0); + signal xgmii_txc : std_logic_vector(7 downto 0); + signal xgmii_rxd : std_logic_vector(63 downto 0); + signal xgmii_rxc : std_logic_vector(7 downto 0); + + signal clk156 : std_logic; + + signal rx_data : std_logic_vector(63 downto 0); + signal rx_start : std_logic; + signal rx_end : std_logic; + signal rx_rem : integer range 0 to 7; + + signal tx_data : std_logic_vector(63 downto 0); + signal tx_start : std_logic; + signal tx_end : std_logic; + signal tx_rem : integer range 0 to 7; +begin + clk156_out <= clk156; + + -- sending + process (clk, reset) + variable state : state_t; + variable length : unsigned(BITS downto 0); + begin + if reset = '1' then + state := state_idle; + read <= '0'; + tx_data <= (others => '0'); + tx_start <= '0'; + tx_end <= '0'; + tx_rem <= 0; + + elsif rising_edge(clk) then + read <= '0'; + tx_data <= (others => '0'); + tx_start <= '0'; + tx_end <= '0'; + tx_rem <= 0; + + if state = state_idle then + if rd_empty = '0' then + length := unsigned(rd_data(BITS downto 0)) + 1; + + if length <= unsigned(rd_count) then + state := state_data; + read <= '1'; + tx_start <= '1'; + end if; + end if; + + elsif state = state_data then + tx_data <= rd_data; + length := length - 1; + + if length > 0 then + read <= '1'; + else + state := state_end; + end if; + + elsif state = state_end then + state := state_idle; + tx_end <= '1'; + tx_rem <= 0; + end if; + end if; + end process; + + -- receiving + process (clk, reset) + variable state : state_t; + variable length : unsigned(BITS downto 0); + begin + if reset = '1' then + state := state_idle; + write <= '0'; + wr_data <= (others => '0'); + + elsif rising_edge(clk) then + write <= '0'; + wr_data <= (others => '0'); + + if state = state_idle then + if rx_start = '1' and rx_end = '0' then + state := state_length; + end if; + + elsif state = state_length then + state := state_idle; + + if rx_end = '0' and + unsigned(rx_data) <= 511 and + 16384 - unsigned(wr_count) >= 512 + then + state := state_data; + length := unsigned(rx_data(BITS downto 0)) + 1; + end if; + end if; + + if state = state_data then + write <= '1'; + wr_data <= rx_data; + length := length - 1; + + if length = 0 then + state := state_idle; + end if; + end if; + end if; + end process; + + xaui : entity work.xaui_top + generic map ( + REVERSE_LANES => REVERSE_LANES + ) + port map ( + dclk => xaui_dclk, + reset => reset, + xgmii_txd => xgmii_txd, + xgmii_txc => xgmii_txc, + xgmii_rxd => xgmii_rxd, + xgmii_rxc => xgmii_rxc, + clk156_out => clk156, + refclk_p => xaui_clk_p, + refclk_n => xaui_clk_n, + xaui_tx_l0_p => xaui_tx_l0_p, + xaui_tx_l0_n => xaui_tx_l0_n, + xaui_tx_l1_p => xaui_tx_l1_p, + xaui_tx_l1_n => xaui_tx_l1_n, + xaui_tx_l2_p => xaui_tx_l2_p, + xaui_tx_l2_n => xaui_tx_l2_n, + xaui_tx_l3_p => xaui_tx_l3_p, + xaui_tx_l3_n => xaui_tx_l3_n, + xaui_rx_l0_p => xaui_rx_l0_p, + xaui_rx_l0_n => xaui_rx_l0_n, + xaui_rx_l1_p => xaui_rx_l1_p, + xaui_rx_l1_n => xaui_rx_l1_n, + xaui_rx_l2_p => xaui_rx_l2_p, + xaui_rx_l2_n => xaui_rx_l2_n, + xaui_rx_l3_p => xaui_rx_l3_p, + xaui_rx_l3_n => xaui_rx_l3_n + ); + + rx_eth : entity work.rx_eth port map ( + clk => clk, + reset => reset, + + xgmii_rxd => xgmii_rxd, + xgmii_rxc => xgmii_rxc, + + rx_data => rx_data, + rx_start => rx_start, + rx_end => rx_end, + rx_rem => rx_rem + ); + + tx_eth : entity work.tx_eth port map ( + clk => clk, + reset => reset, + + xgmii_txd => xgmii_txd, + xgmii_txc => xgmii_txc, + + tx_data => tx_data, + tx_start => tx_start, + tx_end => tx_end, + tx_rem => tx_rem + ); +end arch; diff --git a/netfpga10g/hdl/eth_rx.vhd b/netfpga10g/hdl/eth_rx.vhd new file mode 100644 index 0000000..bcd395f --- /dev/null +++ b/netfpga10g/hdl/eth_rx.vhd @@ -0,0 +1,84 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity eth_rx is port ( + clk : in std_logic; + + wr_en : out std_logic := '0'; + wr_data : out std_logic_vector (63 downto 0) := (others => '0'); + wr_done : out std_logic := '0'; + wr_accept : in std_logic; + + xgmii_rxd : in std_logic_vector(63 downto 0); + xgmii_rxc : in std_logic_vector(7 downto 0) +); +end eth_rx; + +architecture arch of eth_rx is + constant IDLE : std_logic_vector(7 downto 0) := x"07"; + constant START : std_logic_vector(7 downto 0) := x"FB"; + constant TERMINATE : std_logic_vector(7 downto 0) := x"FD"; + constant ERR : std_logic_vector(7 downto 0) := x"FE"; + + type lanes_t is array (0 to 7) of std_logic_vector(7 downto 0); + signal lanes_a : lanes_t; + signal lanes_b : lanes_t; + + signal control_a : std_logic_vector(7 downto 0); + signal control_b : std_logic_vector(7 downto 0); + + type state_t is (state_idle, state_a, state_b); + signal state : state_t := state_idle; +begin + gen_a : for i in 0 to 7 generate + lanes_a(i) <= xgmii_rxd(7+8*i downto 8*i); + control_a(i) <= xgmii_rxc(i); + end generate gen_a; + + lanes_b(4 to 7) <= lanes_a(0 to 3); + control_b(7 downto 4) <= control_a(3 downto 0); + + process (clk) + begin + if rising_edge(clk) then + wr_en <= '0'; + wr_data <= (others => '0'); + wr_done <= '0'; + + lanes_b(0 to 3) <= lanes_a(4 to 7); + control_b(3 downto 0) <= control_a(7 downto 4); + + if state = state_idle and wr_accept = '1' then + if control_a(0) = '1' and lanes_a(0) = START then + state <= state_a; + elsif control_b(0) = '1' and lanes_b(0) = START then + state <= state_b; + end if; + + elsif state = state_a then + wr_en <= '1'; + for i in 0 to 7 loop + wr_data(63-8*i downto 56-8*i) <= lanes_a(i); + + if control_a(i) = '1' and (lanes_a(i) = TERMINATE or lanes_a(i) = ERR) then + state <= state_idle; + wr_done <= '1'; + end if; + end loop; + + elsif state = state_b then + wr_en <= '1'; + for i in 0 to 7 loop + wr_data(63-8*i downto 56-8*i) <= lanes_b(i); + + if control_b(i) = '1' and (lanes_b(i) = TERMINATE or lanes_b(i) = ERR) then + state <= state_idle; + wr_done <= '1'; + end if; + end loop; + end if; + end if; + end process; +end arch; diff --git a/netfpga10g/hdl/eth_tx.vhd b/netfpga10g/hdl/eth_tx.vhd new file mode 100644 index 0000000..cf0081d --- /dev/null +++ b/netfpga10g/hdl/eth_tx.vhd @@ -0,0 +1,68 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity eth_tx is port ( + clk : in std_logic; + + rd_en : out std_logic; + rd_data : in std_logic_vector (63 downto 0); + rd_valid : in std_logic; + + xgmii_txd : out std_logic_vector(63 downto 0); + xgmii_txc : out std_logic_vector(7 downto 0) +); +end eth_tx; + +architecture arch of eth_tx is + constant IDLE : std_logic_vector(7 downto 0) := x"07"; + constant START : std_logic_vector(7 downto 0) := x"FB"; + constant TERMINATE : std_logic_vector(7 downto 0) := x"FD"; + + constant PREAMBLE : std_logic_vector(7 downto 0) := "01010101"; + constant SFD : std_logic_vector(7 downto 0) := "11010101"; + + type lanes_t is array (0 to 7) of std_logic_vector(7 downto 0); + signal lanes : lanes_t := (others => IDLE); + signal control : std_logic_vector(7 downto 0) := (others => '1'); + + type state_t is (state_idle, state_data); + signal state : state_t := state_idle; +begin + lanes_gen : for i in 0 to 7 generate + xgmii_txd(7+8*i downto 8*i) <= lanes(i); + xgmii_txc(i) <= control(i); + end generate lanes_gen; + + rd_en <= '1' when state = state_data else '0'; + + process (clk) + begin + if rising_edge(clk) then + lanes <= (others => IDLE); + control <= (others => '1'); + + if state = state_idle then + if rd_valid = '1' then + state <= state_data; + lanes(0) <= START; + lanes(1 to 6) <= (others => PREAMBLE); + lanes(7) <= SFD; + control(7 downto 1) <= (others => '0'); + end if; + + elsif state = state_data then + if rd_valid = '1' then + for i in 0 to 7 loop + lanes(i) <= rd_data(63-8*i downto 56-8*i); + control(i) <= '0'; + end loop; + else + state <= state_idle; + lanes(0) <= TERMINATE; + end if; + end if; + end if; + end process; +end arch; diff --git a/netfpga10g/hdl/mdio.vhd b/netfpga10g/hdl/mdio.vhd new file mode 100644 index 0000000..1cb34fa --- /dev/null +++ b/netfpga10g/hdl/mdio.vhd @@ -0,0 +1,223 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity mdio is port ( + clk125 : in std_logic; + reset125 : in std_logic; + + command : in std_logic_vector(0 to 27); -- operation(2) & phyaddr(5) & devaddr(5) & data_in(16) + data_out : out std_logic_vector(0 to 15); + enable : in std_logic; + done : out std_logic; + + mdio_in : in std_logic; + mdio_out : out std_logic; + mdio_Z : out std_logic; + mdc : out std_logic; + phy_reset_n : out std_logic; + + total_count : out std_logic_vector(31 downto 0); + address_count : out std_logic_vector(31 downto 0); + write_count : out std_logic_vector(31 downto 0); + read_count : out std_logic_vector(31 downto 0); + read_incr_count : out std_logic_vector(31 downto 0) +); +end mdio; + +architecture arch of mdio is + type state_t is (state_idle, state_preamble, state_start, state_operation, + state_phyaddr, state_devaddr, state_turnaround, state_data); + + signal state : state_t; + signal state_count : natural range 0 to 32; + + signal operation : std_logic_vector(0 to 1); + signal phyaddr : std_logic_vector(0 to 4); + signal devaddr : std_logic_vector(0 to 4); + signal data_in : std_logic_vector(0 to 15); + + signal mdc_count : natural range 0 to 25; + signal mdc_i : std_logic; + + signal total_count_i : unsigned(31 downto 0); + signal address_count_i : unsigned(31 downto 0); + signal write_count_i : unsigned(31 downto 0); + signal read_count_i : unsigned(31 downto 0); + signal read_incr_count_i : unsigned(31 downto 0); + + signal done_i : std_logic; +begin + phy_reset_n <= not reset125; + mdc <= mdc_i; + + operation <= command(0 to 1); + phyaddr <= command(2 to 6); + devaddr <= command(7 to 11); + data_in <= command(12 to 27); + + done <= done_i; + + process (clk125, reset125) begin + if reset125 = '1' then + mdc_i <= '0'; + mdc_count <= 0; + done_i <= '0'; + + elsif rising_edge(clk125) then + done_i <= '0'; + + if mdc_count = 25 - 1 then + mdc_count <= 0; + mdc_i <= not mdc_i; -- 2.5 MHz + + if mdc_i = '0' then -- rising edge + if state = state_data and state_count = 15 then + done_i <= '1'; + end if; + end if; + else + mdc_count <= mdc_count + 1; + end if; + end if; + end process; + + process (mdc_i, reset125) begin + if reset125 = '1' then + state <= state_idle; + state_count <= 0; + data_out <= (others => '0'); + + elsif rising_edge(mdc_i) then + state_count <= state_count + 1; + + if state = state_preamble then + if state_count = 31 then + state <= state_start; + state_count <= 0; + end if; + elsif state = state_start then + if state_count = 1 then + state <= state_operation; + state_count <= 0; + end if; + elsif state = state_operation then + if state_count = 1 then + state <= state_phyaddr; + state_count <= 0; + end if; + elsif state = state_phyaddr then + if state_count = 4 then + state <= state_devaddr; + state_count <= 0; + end if; + elsif state = state_devaddr then + if state_count = 4 then + state <= state_turnaround; + state_count <= 0; + end if; + elsif state = state_turnaround then + if state_count = 1 then + state <= state_data; + state_count <= 0; + end if; + elsif state = state_data then + data_out(state_count) <= mdio_in; + + if state_count = 15 then + state <= state_idle; + state_count <= 0; + end if; + else -- state = state_idle + if enable = '1' then + state <= state_preamble; + state_count <= 0; + end if; + end if; + end if; + end process; + + process (mdc_i, reset125) begin + if reset125 = '1' then + mdio_out <= '0'; + mdio_Z <= '1'; + + elsif falling_edge(mdc_i) then + mdio_out <= '0'; + mdio_Z <= '1'; + + if state = state_preamble then + mdio_out <= '1'; + mdio_Z <= '0'; + + elsif state = state_start then + mdio_out <= '0'; + mdio_Z <= '0'; + + elsif state = state_operation then + mdio_out <= operation(state_count); + mdio_Z <= '0'; + + elsif state = state_phyaddr then + mdio_out <= phyaddr(state_count); + mdio_Z <= '0'; + + elsif state = state_devaddr then + mdio_out <= devaddr(state_count); + mdio_Z <= '0'; + + elsif state = state_turnaround then + if operation(0) = '0' then -- write or address + mdio_Z <= '0'; + + if state_count = 0 then + mdio_out <= '1'; + else + mdio_out <= '0'; + end if; + end if; + + elsif state = state_data then + if operation(0) = '0' then -- write or address + mdio_Z <= '0'; + mdio_out <= data_in(state_count); + end if; + end if; + end if; + end process; + + total_count <= std_logic_vector(total_count_i); + address_count <= std_logic_vector(address_count_i); + write_count <= std_logic_vector(write_count_i); + read_count <= std_logic_vector(read_count_i); + read_incr_count <= std_logic_vector(read_incr_count_i); + + process (clk125, reset125) begin + if reset125 = '1' then + total_count_i <= (others => '0'); + address_count_i <= (others => '0'); + write_count_i <= (others => '0'); + read_count_i <= (others => '0'); + read_incr_count_i <= (others => '0'); + + elsif rising_edge(clk125) then + if done_i = '1' then + total_count_i <= total_count_i + 1; + + if operation = "00" then + address_count_i <= address_count_i + 1; + end if; + if operation = "01" then + write_count_i <= write_count_i + 1; + end if; + if operation = "11" then + read_count_i <= read_count_i + 1; + end if; + if operation = "10" then + read_incr_count_i <= read_incr_count_i + 1; + end if; + end if; + end if; + end process; +end arch; diff --git a/netfpga10g/hdl/pcie.vhd b/netfpga10g/hdl/pcie.vhd new file mode 100644 index 0000000..6dd99cf --- /dev/null +++ b/netfpga10g/hdl/pcie.vhd @@ -0,0 +1,268 @@ + +library ieee; +use ieee.std_logic_1164.all; + +entity pcie is +generic ( + BITS : integer := 14 +); +port ( + pcie_clk_p : in std_logic; + pcie_clk_n : in std_logic; + reset25 : in std_logic; + + clk125_out : out std_logic; + reset125_out : out std_logic; + + pci_exp_rxn : in std_logic_vector(7 downto 0); + pci_exp_rxp : in std_logic_vector(7 downto 0); + pci_exp_txn : out std_logic_vector(7 downto 0); + pci_exp_txp : out std_logic_vector(7 downto 0); + + port0_read : out std_logic; + port0_rd_data : in std_logic_vector(63 downto 0); + port0_rd_empty : in std_logic; + port0_rd_count : in std_logic_vector(BITS downto 0); + + port0_write : out std_logic; + port0_wr_data : out std_logic_vector(63 downto 0); + port0_wr_full : in std_logic; + port0_wr_count : in std_logic_vector(BITS downto 0); + + port1_read : out std_logic; + port1_rd_data : in std_logic_vector(63 downto 0); + port1_rd_empty : in std_logic; + port1_rd_count : in std_logic_vector(BITS downto 0); + + port1_write : out std_logic; + port1_wr_data : out std_logic_vector(63 downto 0); + port1_wr_full : in std_logic; + port1_wr_count : in std_logic_vector(BITS downto 0); + + port2_read : out std_logic; + port2_rd_data : in std_logic_vector(63 downto 0); + port2_rd_empty : in std_logic; + port2_rd_count : in std_logic_vector(BITS downto 0); + + port2_write : out std_logic; + port2_wr_data : out std_logic_vector(63 downto 0); + port2_wr_full : in std_logic; + port2_wr_count : in std_logic_vector(BITS downto 0); + + port3_read : out std_logic; + port3_rd_data : in std_logic_vector(63 downto 0); + port3_rd_empty : in std_logic; + port3_rd_count : in std_logic_vector(BITS downto 0); + + port3_write : out std_logic; + port3_wr_data : out std_logic_vector(63 downto 0); + port3_wr_full : in std_logic; + port3_wr_count : in std_logic_vector(BITS downto 0); + + mdio_command : out std_logic_vector(0 to 27); + mdio_data : in std_logic_vector(0 to 15); + mdio_enable : out std_logic; + mdio_done : in std_logic; + + leds : out std_logic_vector(2 downto 0) +); +end pcie; + +architecture arch of pcie is + signal clk125 : std_logic; + signal reset125 : std_logic; + + signal rx_frame : std_logic_vector(63 downto 0); + signal rx_sof : std_logic; + signal rx_eof : std_logic; + signal rx_valid : std_logic; + + signal rx_read : std_logic; + signal rx_write : std_logic; + signal rx_complete : std_logic; + signal rx_data : std_logic_vector(63 downto 0); + signal rx_address : std_logic_vector(28 downto 0); + + signal tx_frame : std_logic_vector(63 downto 0); + signal tx_sof : std_logic; + signal tx_eof : std_logic; + signal tx_half : std_logic; + signal tx_valid : std_logic; + signal tx_ready : std_logic; + + signal tx_read : std_logic; + signal tx_write : std_logic; + signal tx_complete : std_logic; + signal tx_data : std_logic_vector(63 downto 0); + signal tx_address : std_logic_vector(28 downto 0); + signal tx_length : std_logic_vector(8 downto 0); + signal tx_accept : std_logic; + signal tx_done : std_logic; + + signal bus_dev_func : std_logic_vector(15 downto 0); + signal transaction_id : std_logic_vector(23 downto 0); + + signal max_read : std_logic_vector(2 downto 0); + signal max_write : std_logic_vector(2 downto 0); + + signal interrupt : std_logic; + signal interrupt_rdy : std_logic; + + signal bar0 : std_logic; +begin + clk125_out <= clk125; + reset125_out <= reset125; + + pcie_wrapper : entity work.pcie_wrapper port map ( + pcie_clk_p => pcie_clk_p, + pcie_clk_n => pcie_clk_n, + reset25 => reset25, + + clk125 => clk125, + reset125 => reset125, + + pci_exp_rxn => pci_exp_rxn, + pci_exp_rxp => pci_exp_rxp, + pci_exp_txn => pci_exp_txn, + pci_exp_txp => pci_exp_txp, + + rx_frame => rx_frame, + rx_sof => rx_sof, + rx_eof => rx_eof, + rx_valid => rx_valid, + + tx_frame => tx_frame, + tx_sof => tx_sof, + tx_eof => tx_eof, + tx_half => tx_half, + tx_valid => tx_valid, + tx_ready => tx_ready, + + bus_dev_func => bus_dev_func, + + max_read => max_read, + max_write => max_write, + + interrupt => interrupt, + interrupt_rdy => interrupt_rdy, + + bar0 => bar0 + ); + + pcie_rx : entity work.pcie_rx port map ( + clk => clk125, + reset => reset125, + + frame => rx_frame, + sof => rx_sof, + eof => rx_eof, + valid => rx_valid, + + read => rx_read, + write => rx_write, + complete => rx_complete, + data => rx_data, + address => rx_address, + + transaction_id => transaction_id, + bar0 => bar0 + ); + + pcie_tx : entity work.pcie_tx port map ( + clk => clk125, + reset => reset125, + + frame => tx_frame, + sof => tx_sof, + eof => tx_eof, + half => tx_half, + valid => tx_valid, + ready => tx_ready, + + read => tx_read, + write => tx_write, + complete => tx_complete, + data => tx_data, + address => tx_address, + length => tx_length, + accept => tx_accept, + done => tx_done, + + transaction_id => transaction_id, + bus_dev_func => bus_dev_func + ); + + dma : entity work.dma port map ( + clk => clk125, + reset => reset125, + + rx_read => rx_read, + rx_write => rx_write, + rx_complete => rx_complete, + rx_data => rx_data, + rx_address => rx_address, + + tx_read => tx_read, + tx_write => tx_write, + tx_complete => tx_complete, + tx_data => tx_data, + tx_address => tx_address, + tx_length => tx_length, + tx_accept => tx_accept, + tx_done => tx_done, + + port0_read => port0_read, + port0_rd_data => port0_rd_data, + port0_rd_empty => port0_rd_empty, + port0_rd_count => port0_rd_count, + + port0_write => port0_write, + port0_wr_data => port0_wr_data, + port0_wr_full => port0_wr_full, + port0_wr_count => port0_wr_count, + + port1_read => port1_read, + port1_rd_data => port1_rd_data, + port1_rd_empty => port1_rd_empty, + port1_rd_count => port1_rd_count, + + port1_write => port1_write, + port1_wr_data => port1_wr_data, + port1_wr_full => port1_wr_full, + port1_wr_count => port1_wr_count, + + port2_read => port2_read, + port2_rd_data => port2_rd_data, + port2_rd_empty => port2_rd_empty, + port2_rd_count => port2_rd_count, + + port2_write => port2_write, + port2_wr_data => port2_wr_data, + port2_wr_full => port2_wr_full, + port2_wr_count => port2_wr_count, + + port3_read => port3_read, + port3_rd_data => port3_rd_data, + port3_rd_empty => port3_rd_empty, + port3_rd_count => port3_rd_count, + + port3_write => port3_write, + port3_wr_data => port3_wr_data, + port3_wr_full => port3_wr_full, + port3_wr_count => port3_wr_count, + + max_read => max_read, + max_write => max_write, + + interrupt => interrupt, + interrupt_rdy => interrupt_rdy, + + mdio_command => mdio_command, + mdio_data => mdio_data, + mdio_enable => mdio_enable, + mdio_done => mdio_done, + + leds => leds + ); +end arch; + diff --git a/netfpga10g/hdl/pcie_rx.vhd b/netfpga10g/hdl/pcie_rx.vhd new file mode 100644 index 0000000..c4ee177 --- /dev/null +++ b/netfpga10g/hdl/pcie_rx.vhd @@ -0,0 +1,98 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity pcie_rx is port ( + clk : in std_logic; + + frame : in std_logic_vector(63 downto 0); + sof : in std_logic; + eof : in std_logic; + valid : in std_logic; + + read : out std_logic := '0'; + write : out std_logic := '0'; + complete : out std_logic := '0'; + data : out std_logic_vector(63 downto 0) := (others => '0'); + address : out std_logic_vector(63 downto 3) := (others => '0'); + tag : out std_logic_vector(4 downto 0) := (others => '0'); + remote : out std_logic_vector(23 downto 0) := (others => '0'); + + bar0 : in std_logic +); +end pcie_rx; + +architecture arch of pcie_rx is + type state_t is (state_idle, state_read, state_write, state_write_head, + state_complete, state_complete_head); + + signal fmt : std_logic_vector(1 downto 0); + signal typ : std_logic_vector(4 downto 0); + signal status : std_logic_vector(2 downto 0); +begin + fmt <= frame(62 downto 61); + typ <= frame(60 downto 56); + status <= frame(15 downto 13); + + process (clk) + variable state : state_t := state_idle; + variable extra : std_logic_vector(31 downto 0) := (others => '0'); + begin + if rising_edge(clk) then + read <= '0'; + write <= '0'; + complete <= '0'; + + if valid = '0' then + -- nothing + + elsif state = state_idle and sof = '1' then + data <= (others => '0'); + address <= (others => '0'); + tag <= (others => '0'); + + if fmt = "00" and typ = "00000" and bar0 = '1' then + state := state_read; + remote <= frame(31 downto 8); + + elsif fmt = "10" and typ = "00000" and bar0 = '1' then + state := state_write_head; + + elsif fmt = "10" and typ = "01010" and status = "000" then + state := state_complete_head; + end if; + + elsif state = state_read then + state := state_idle; + read <= '1'; + address <= x"00000000" & frame(63 downto 35); + + elsif state = state_write_head then + state := state_write; + address <= x"00000000" & frame(63 downto 35); + extra := frame(31 downto 0); + + elsif state = state_write then + state := state_idle; + write <= '1'; + data <= extra & frame(63 downto 32); + + elsif state = state_complete_head then + state := state_complete; + tag <= frame(44 downto 40); + extra := frame(31 downto 0); + + elsif state = state_complete then + complete <= '1'; + data <= extra & frame(63 downto 32); + extra := frame(31 downto 0); + end if; + + if valid = '1' and eof = '1' then + state := state_idle; + end if; + end if; + end process; +end arch; + diff --git a/netfpga10g/hdl/pcie_tx.vhd b/netfpga10g/hdl/pcie_tx.vhd new file mode 100644 index 0000000..dc892b4 --- /dev/null +++ b/netfpga10g/hdl/pcie_tx.vhd @@ -0,0 +1,178 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity pcie_tx is port ( + clk : in std_logic; + + frame : out std_logic_vector(63 downto 0) := (others => '0'); + sof : out std_logic := '0'; + eof : out std_logic := '0'; + half : out std_logic := '0'; + valid : out std_logic := '0'; + ready : in std_logic; + + read : in std_logic; + write : in std_logic; + complete : in std_logic; + data : in std_logic_vector(63 downto 0); + address : in std_logic_vector(63 downto 3); + length : in std_logic_vector(8 downto 0); + tag : in std_logic_vector(4 downto 0); + local : in std_logic_vector(15 downto 0); + remote : in std_logic_vector(23 downto 0); + accept : out std_logic; + done : out std_logic +); +end pcie_tx; + +architecture arch of pcie_tx is + type state_t is (state_idle, state_read_32, state_read_64, + state_write_32, state_write_64, + state_write_end_32, state_write_head_64, + state_complete, state_complete_head, state_done); + signal state : state_t := state_idle; +begin + accept <= ready when state = state_write_32 or state = state_write_64 else '0'; + done <= ready when state = state_done else '0'; + + process (clk) + variable extra : std_logic_vector(31 downto 0) := (others => '0'); + variable remain : unsigned(8 downto 0) := (others => '0'); + begin + if rising_edge(clk) and (ready = '1' or state = state_idle) then + frame <= (others => '0'); + sof <= '0'; + eof <= '0'; + half <= '0'; + valid <= '0'; + + -- read + if state = state_idle and read = '1' then + if unsigned(length) = 0 then + state <= state_done; + else + if address(63 downto 32) = x"00000000" then + state <= state_read_32; + frame <= "0" & "00" & "00000" & x"00" & + "000000" & + length & "0" & + local & + "000" & tag & x"FF"; + else + state <= state_read_64; + frame <= "0" & "01" & "00000" & x"00" & + "000000" & + length & "0" & + local & + "000" & tag & x"FF"; + end if; + sof <= '1'; + valid <= '1'; + end if; + + elsif state = state_read_32 then + state <= state_done; + frame <= address(31 downto 3) & "000" & x"00000000"; + eof <= '1'; + half <= '1'; + valid <= '1'; + + elsif state = state_read_64 then + state <= state_done; + frame <= address & "000"; + eof <= '1'; + valid <= '1'; + + -- write + elsif state = state_idle and write = '1' then + if unsigned(length) = 0 then + state <= state_done; + else + if address(63 downto 32) = x"00000000" then + state <= state_write_32; + frame <= "0" & "10" & "00000" & x"00" & + "000000" & + length & "0" & + local & + x"00" & x"FF"; + extra := address(31 downto 3) & "000"; + else + state <= state_write_head_64; + frame <= "0" & "11" & "00000" & x"00" & + "000000" & + length & "0" & + local & + x"00" & x"FF"; + end if; + sof <= '1'; + valid <= '1'; + remain := unsigned(length); + end if; + + elsif state = state_write_32 then + frame <= extra & data(63 downto 32); + extra := data(31 downto 0); + valid <= '1'; + + remain := remain - 1; + + if remain = 0 then + state <= state_write_end_32; + end if; + + elsif state = state_write_end_32 then + state <= state_done; + frame <= extra & x"00000000"; + eof <= '1'; + half <= '1'; + valid <= '1'; + + elsif state = state_write_head_64 then + state <= state_write_64; + frame <= address & "000"; + valid <= '1'; + + elsif state = state_write_64 then + frame <= data; + valid <= '1'; + + remain := remain - 1; + + if remain = 0 then + state <= state_done; + eof <= '1'; + end if; + + -- complete + elsif state = state_idle and complete = '1' then + state <= state_complete_head; + frame <= "0" & "10" & "01010" & x"00" & + x"0002" & + local & + x"0008"; + sof <= '1'; + valid <= '1'; + + elsif state = state_complete_head then + state <= state_complete; + frame <= remote & "0" & address(6 downto 3) & "000" & + data(63 downto 32); + valid <= '1'; + + elsif state = state_complete then + state <= state_done; + frame <= data(31 downto 0) & x"00000000"; + eof <= '1'; + half <= '1'; + valid <= '1'; + + -- done + elsif state = state_done then + state <= state_idle; + end if; + end if; + end process; +end arch; + diff --git a/netfpga10g/hdl/pcie_wrapper.vhd b/netfpga10g/hdl/pcie_wrapper.vhd new file mode 100644 index 0000000..35c6047 --- /dev/null +++ b/netfpga10g/hdl/pcie_wrapper.vhd @@ -0,0 +1,358 @@ + +library ieee; +use ieee.std_logic_1164.all; + +library unisim; +use unisim.vcomponents.all; + +entity pcie_wrapper is port ( + pcie_clk_p : in std_logic; + pcie_clk_n : in std_logic; + reset25 : in std_logic; + + clk125 : out std_logic; + reset125 : out std_logic; + + pci_exp_rxn : in std_logic_vector(7 downto 0); + pci_exp_rxp : in std_logic_vector(7 downto 0); + pci_exp_txn : out std_logic_vector(7 downto 0); + pci_exp_txp : out std_logic_vector(7 downto 0); + + rx_frame : out std_logic_vector(63 downto 0); + rx_sof : out std_logic; + rx_eof : out std_logic; + rx_valid : out std_logic; + + tx_frame : in std_logic_vector(63 downto 0); + tx_sof : in std_logic; + tx_eof : in std_logic; + tx_half : in std_logic; + tx_valid : in std_logic; + tx_ready : out std_logic; + + bus_dev_func : out std_logic_vector(15 downto 0); + + max_read : out std_logic_vector(2 downto 0); + max_write : out std_logic_vector(2 downto 0); + + interrupt : in std_logic; + interrupt_rdy : out std_logic; + + bar0 : out std_logic +); +end pcie_wrapper; + +architecture arch of pcie_wrapper is + + component pcie_core port ( + pci_exp_rxn : in std_logic_vector(7 downto 0); + pci_exp_rxp : in std_logic_vector(7 downto 0); + pci_exp_txn : out std_logic_vector(7 downto 0); + pci_exp_txp : out std_logic_vector(7 downto 0); + + sys_clk : in std_logic; + sys_reset_n : in std_logic; + + refclkout : out std_logic; + + trn_clk : out std_logic; + trn_reset_n : out std_logic; + trn_lnk_up_n : out std_logic; + + trn_rd : out std_logic_vector(63 downto 0); + trn_rrem_n : out std_logic_vector(7 downto 0); + trn_rsof_n : out std_logic; + trn_reof_n : out std_logic; + trn_rsrc_dsc_n : out std_logic; + trn_rsrc_rdy_n : out std_logic; + trn_rbar_hit_n : out std_logic_vector(6 downto 0); + trn_rdst_rdy_n : in std_logic; + trn_rerrfwd_n : out std_logic; + trn_rnp_ok_n : in std_logic; + trn_rfc_npd_av : out std_logic_vector(11 downto 0); + trn_rfc_nph_av : out std_logic_vector(7 downto 0); + trn_rfc_pd_av : out std_logic_vector(11 downto 0); + trn_rfc_ph_av : out std_logic_vector(7 downto 0); + trn_rcpl_streaming_n : in std_logic; + + trn_td : in std_logic_vector(63 downto 0); + trn_trem_n : in std_logic_vector(7 downto 0); + trn_tsof_n : in std_logic; + trn_teof_n : in std_logic; + trn_tsrc_dsc_n : in std_logic; + trn_tsrc_rdy_n : in std_logic; + trn_tdst_dsc_n : out std_logic; + trn_tdst_rdy_n : out std_logic; + trn_terrfwd_n : in std_logic ; + trn_tbuf_av : out std_logic_vector(3 downto 0); + + cfg_do : out std_logic_vector(31 downto 0); + cfg_rd_wr_done_n : out std_logic; + cfg_di : in std_logic_vector(31 downto 0); + cfg_byte_en_n : in std_logic_vector(3 downto 0); + cfg_dwaddr : in std_logic_vector(9 downto 0); + cfg_wr_en_n : in std_logic; + cfg_rd_en_n : in std_logic; + + cfg_err_cor_n : in std_logic; + cfg_err_cpl_abort_n : in std_logic; + cfg_err_cpl_timeout_n : in std_logic; + cfg_err_cpl_unexpect_n : in std_logic; + cfg_err_ecrc_n : in std_logic; + cfg_err_posted_n : in std_logic; + cfg_err_tlp_cpl_header : in std_logic_vector(47 downto 0); + cfg_err_ur_n : in std_logic; + cfg_err_cpl_rdy_n : out std_logic; + cfg_err_locked_n : in std_logic; + cfg_interrupt_n : in std_logic; + cfg_interrupt_rdy_n : out std_logic; + cfg_pm_wake_n : in std_logic; + cfg_pcie_link_state_n : out std_logic_vector(2 downto 0); + cfg_to_turnoff_n : out std_logic; + cfg_interrupt_assert_n : in std_logic; + cfg_interrupt_di : in std_logic_vector(7 downto 0); + cfg_interrupt_do : out std_logic_vector(7 downto 0); + cfg_interrupt_mmenable : out std_logic_vector(2 downto 0); + cfg_interrupt_msienable : out std_logic; + + cfg_trn_pending_n : in std_logic; + cfg_bus_number : out std_logic_vector(7 downto 0); + cfg_device_number : out std_logic_vector(4 downto 0); + cfg_function_number : out std_logic_vector(2 downto 0); + cfg_status : out std_logic_vector(15 downto 0); + cfg_command : out std_logic_vector(15 downto 0); + cfg_dstatus : out std_logic_vector(15 downto 0); + cfg_dcommand : out std_logic_vector(15 downto 0); + cfg_lstatus : out std_logic_vector(15 downto 0); + cfg_lcommand : out std_logic_vector(15 downto 0); + cfg_dsn : in std_logic_vector(63 downto 0); + + fast_train_simulation_only : in std_logic + ); + end component; + + signal sys_reset_n : std_logic; + + signal trn_clk : std_logic; + signal trn_reset_n : std_logic; + signal trn_lnk_up_n : std_logic; + + signal trn_rd : std_logic_vector(63 downto 0); + signal trn_rrem_n : std_logic_vector(7 downto 0); + signal trn_rsof_n : std_logic; + signal trn_reof_n : std_logic; + signal trn_rsrc_dsc_n : std_logic; + signal trn_rsrc_rdy_n : std_logic; + signal trn_rbar_hit_n : std_logic_vector(6 downto 0); + signal trn_rdst_rdy_n : std_logic; + signal trn_rerrfwd_n : std_logic; + signal trn_rnp_ok_n : std_logic; + signal trn_rfc_npd_av : std_logic_vector(11 downto 0); + signal trn_rfc_nph_av : std_logic_vector(7 downto 0); + signal trn_rfc_pd_av : std_logic_vector(11 downto 0); + signal trn_rfc_ph_av : std_logic_vector(7 downto 0); + signal trn_rcpl_streaming_n : std_logic; + + signal trn_td : std_logic_vector(63 downto 0); + signal trn_trem_n : std_logic_vector(7 downto 0); + signal trn_tsof_n : std_logic; + signal trn_teof_n : std_logic; + signal trn_tsrc_dsc_n : std_logic; + signal trn_tsrc_rdy_n : std_logic; + signal trn_tdst_dsc_n : std_logic; + signal trn_tdst_rdy_n : std_logic; + signal trn_terrfwd_n : std_logic; + signal trn_tbuf_av : std_logic_vector(3 downto 0); + + signal cfg_do : std_logic_vector(31 downto 0); + signal cfg_rd_wr_done_n : std_logic; + signal cfg_di : std_logic_vector(31 downto 0); + signal cfg_byte_en_n : std_logic_vector(3 downto 0); + signal cfg_dwaddr : std_logic_vector(9 downto 0); + signal cfg_wr_en_n : std_logic; + signal cfg_rd_en_n : std_logic; + + signal cfg_err_cor_n : std_logic; + signal cfg_err_cpl_abort_n : std_logic; + signal cfg_err_cpl_timeout_n : std_logic; + signal cfg_err_cpl_unexpect_n : std_logic; + signal cfg_err_ecrc_n : std_logic; + signal cfg_err_posted_n : std_logic; + signal cfg_err_tlp_cpl_header : std_logic_vector(47 downto 0); + signal cfg_err_ur_n : std_logic; + signal cfg_err_cpl_rdy_n : std_logic; + signal cfg_err_locked_n : std_logic; + signal cfg_interrupt_n : std_logic; + signal cfg_interrupt_rdy_n : std_logic; + signal cfg_pm_wake_n : std_logic; + signal cfg_pcie_link_state_n : std_logic_vector(2 downto 0); + signal cfg_to_turnoff_n : std_logic; + signal cfg_interrupt_assert_n : std_logic; + signal cfg_interrupt_di : std_logic_vector(7 downto 0); + signal cfg_interrupt_do : std_logic_vector(7 downto 0); + signal cfg_interrupt_mmenable : std_logic_vector(2 downto 0); + signal cfg_interrupt_msienable : std_logic; + + signal cfg_trn_pending_n : std_logic; + signal cfg_bus_number : std_logic_vector(7 downto 0); + signal cfg_device_number : std_logic_vector(4 downto 0); + signal cfg_function_number : std_logic_vector(2 downto 0); + signal cfg_status : std_logic_vector(15 downto 0); + signal cfg_command : std_logic_vector(15 downto 0); + signal cfg_dstatus : std_logic_vector(15 downto 0); + signal cfg_dcommand : std_logic_vector(15 downto 0); + signal cfg_lstatus : std_logic_vector(15 downto 0); + signal cfg_lcommand : std_logic_vector(15 downto 0); + signal cfg_dsn : std_logic_vector(63 downto 0); + + signal pcie_clk : std_logic; +begin + pcie_clk_ibuf : IBUFDS port map ( + O => pcie_clk, + I => pcie_clk_p, + IB => pcie_clk_n + ); + + sys_reset_n <= not reset25; + + trn_rdst_rdy_n <= '0'; + trn_rnp_ok_n <= '0'; + trn_rcpl_streaming_n <= '1'; + + trn_tsrc_dsc_n <= '1'; + trn_terrfwd_n <= '1'; + + cfg_di <= (others => '0'); + cfg_byte_en_n <= (others => '1'); + cfg_dwaddr <= (others => '0'); + cfg_wr_en_n <= '1'; + cfg_rd_en_n <= '1'; + + cfg_err_cor_n <= '1'; + cfg_err_cpl_abort_n <= '1'; + cfg_err_cpl_timeout_n <= '1'; + cfg_err_cpl_unexpect_n <= '1'; + cfg_err_ecrc_n <= '1'; + cfg_err_posted_n <= '1'; + cfg_err_tlp_cpl_header <= (others => '0'); + cfg_err_ur_n <= '1'; + cfg_err_locked_n <= '1'; + cfg_interrupt_n <= not interrupt; + cfg_pm_wake_n <= '1'; + cfg_interrupt_assert_n <= '1'; + cfg_interrupt_di <= (others => '0'); + interrupt_rdy <= not cfg_interrupt_rdy_n; + + cfg_trn_pending_n <= '1'; + cfg_dsn <= (others => '0'); + + ep : pcie_core port map ( + pci_exp_rxn => pci_exp_rxn, + pci_exp_rxp => pci_exp_rxp, + pci_exp_txn => pci_exp_txn, + pci_exp_txp => pci_exp_txp, + + sys_clk => pcie_clk, + sys_reset_n => sys_reset_n, + + refclkout => open, + + trn_clk => trn_clk, + trn_reset_n => trn_reset_n, + trn_lnk_up_n => trn_lnk_up_n, + + trn_rd => trn_rd, + trn_rrem_n => trn_rrem_n, + trn_rsof_n => trn_rsof_n, + trn_reof_n => trn_reof_n, + trn_rsrc_dsc_n => trn_rsrc_dsc_n, + trn_rsrc_rdy_n => trn_rsrc_rdy_n, + trn_rbar_hit_n => trn_rbar_hit_n, + trn_rdst_rdy_n => trn_rdst_rdy_n, + trn_rerrfwd_n => trn_rerrfwd_n, + trn_rnp_ok_n => trn_rnp_ok_n, + trn_rfc_npd_av => trn_rfc_npd_av, + trn_rfc_nph_av => trn_rfc_nph_av, + trn_rfc_pd_av => trn_rfc_pd_av, + trn_rfc_ph_av => trn_rfc_ph_av, + trn_rcpl_streaming_n => trn_rcpl_streaming_n, + + trn_td => trn_td, + trn_trem_n => trn_trem_n, + trn_tsof_n => trn_tsof_n, + trn_teof_n => trn_teof_n, + trn_tsrc_dsc_n => trn_tsrc_dsc_n, + trn_tsrc_rdy_n => trn_tsrc_rdy_n, + trn_tdst_dsc_n => trn_tdst_dsc_n, + trn_tdst_rdy_n => trn_tdst_rdy_n, + trn_terrfwd_n => trn_terrfwd_n, + trn_tbuf_av => trn_tbuf_av, + + cfg_do => cfg_do, + cfg_rd_wr_done_n => cfg_rd_wr_done_n, + cfg_di => cfg_di, + cfg_byte_en_n => cfg_byte_en_n, + cfg_dwaddr => cfg_dwaddr, + cfg_wr_en_n => cfg_wr_en_n, + cfg_rd_en_n => cfg_rd_en_n, + + cfg_err_cor_n => cfg_err_cor_n, + cfg_err_cpl_abort_n => cfg_err_cpl_abort_n, + cfg_err_cpl_timeout_n => cfg_err_cpl_timeout_n, + cfg_err_cpl_unexpect_n => cfg_err_cpl_unexpect_n, + cfg_err_ecrc_n => cfg_err_ecrc_n, + cfg_err_posted_n => cfg_err_posted_n, + cfg_err_tlp_cpl_header => cfg_err_tlp_cpl_header, + cfg_err_ur_n => cfg_err_ur_n, + cfg_err_cpl_rdy_n => cfg_err_cpl_rdy_n, + cfg_err_locked_n => cfg_err_locked_n, + cfg_interrupt_n => cfg_interrupt_n, + cfg_interrupt_rdy_n => cfg_interrupt_rdy_n, + cfg_pm_wake_n => cfg_pm_wake_n, + cfg_pcie_link_state_n => cfg_pcie_link_state_n, + cfg_to_turnoff_n => cfg_to_turnoff_n, + cfg_interrupt_assert_n => cfg_interrupt_assert_n, + cfg_interrupt_di => cfg_interrupt_di, + cfg_interrupt_do => cfg_interrupt_do, + cfg_interrupt_mmenable => cfg_interrupt_mmenable, + cfg_interrupt_msienable => cfg_interrupt_msienable, + + cfg_trn_pending_n => cfg_trn_pending_n, + cfg_bus_number => cfg_bus_number, + cfg_device_number => cfg_device_number, + cfg_function_number => cfg_function_number, + cfg_status => cfg_status, + cfg_command => cfg_command, + cfg_dstatus => cfg_dstatus, + cfg_dcommand => cfg_dcommand, + cfg_lstatus => cfg_lstatus, + cfg_lcommand => cfg_lcommand, + cfg_dsn => cfg_dsn, + + fast_train_simulation_only => '0' + ); + + clk125 <= trn_clk; + reset125 <= not trn_reset_n; + + rx_frame <= trn_rd; + rx_sof <= not trn_rsof_n; + rx_eof <= not trn_reof_n; + rx_valid <= not trn_rsrc_rdy_n; + + trn_td <= tx_frame; + trn_tsof_n <= not tx_sof; + trn_teof_n <= not tx_eof; + trn_tsrc_rdy_n <= not tx_valid; + trn_trem_n <= x"0F" when tx_half = '1' else x"00"; + + tx_ready <= not trn_tdst_rdy_n; + + bus_dev_func <= cfg_bus_number & cfg_device_number & cfg_function_number; + + max_read <= cfg_dcommand(14 downto 12); + max_write <= cfg_dcommand(7 downto 5); + + bar0 <= not trn_rbar_hit_n(0); +end arch; + diff --git a/netfpga10g/hdl/port_fifo.vhd b/netfpga10g/hdl/port_fifo.vhd new file mode 100644 index 0000000..ff8c93a --- /dev/null +++ b/netfpga10g/hdl/port_fifo.vhd @@ -0,0 +1,94 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity port_fifo is +generic ( + BITS : integer := 14 +); +port ( + reset : in std_logic; + + rd_clk : in std_logic; + rd_read : in std_logic; + rd_data : out std_logic_vector(63 downto 0); + rd_empty : out std_logic; + rd_count : out std_logic_vector(BITS downto 0); + + wr_clk : in std_logic; + wr_write : in std_logic; + wr_data : in std_logic_vector(63 downto 0); + wr_full : out std_logic; + wr_count : out std_logic_vector(BITS downto 0) +); +end port_fifo; + +architecture arch of port_fifo is + + component data_fifo port ( + rst : in std_logic; + rd_clk : in std_logic; + rd_en : in std_logic; + dout : out std_logic_vector(63 downto 0); + empty : out std_logic; + rd_data_count : out std_logic_vector(BITS downto 0); + wr_clk : in std_logic; + wr_en : in std_logic; + din : in std_logic_vector(63 downto 0); + full : out std_logic; + wr_data_count : out std_logic_vector(BITS downto 0) + ); + end component; + + signal raw_read : std_logic; + signal raw_data : std_logic_vector(63 downto 0); + signal raw_empty : std_logic; + signal raw_count : std_logic_vector(BITS downto 0); + + signal has_extra : std_logic; + signal extra : std_logic_vector(63 downto 0); +begin + rd_data <= extra when has_extra = '1' and rd_read = '0' else raw_data; + rd_empty <= '0' when has_extra = '1' and rd_read = '0' else '1'; + rd_count <= std_logic_vector(unsigned(raw_count) + 1) when has_extra = '1' and rd_read = '0' else raw_count; + + raw_read <= '0' when has_extra = '1' and rd_read = '0' else '1'; + + process (rd_clk, reset) + begin + if reset = '1' then + has_extra <= '0'; + extra <= (others => '0'); + + elsif rising_edge(rd_clk) then + if has_extra = '1' then + if rd_read = '1' then + has_extra <= not raw_empty; + extra <= raw_data; + end if; + else + if rd_read = '0' then + has_extra <= not raw_empty; + extra <= raw_data; + end if; + end if; + end if; + end process; + + fifo : data_fifo port map ( + rst => reset, + + rd_clk => rd_clk, + rd_en => raw_read, + dout => raw_data, + empty => raw_empty, + rd_data_count => raw_count, + + wr_clk => wr_clk, + wr_en => wr_write, + din => wr_data, + full => wr_full, + wr_data_count => wr_count + ); +end arch; diff --git a/netfpga10g/hdl/recv_mux.vhd b/netfpga10g/hdl/recv_mux.vhd new file mode 100644 index 0000000..42932af --- /dev/null +++ b/netfpga10g/hdl/recv_mux.vhd @@ -0,0 +1,86 @@ + +library IEEE; +use IEEE.STD_LOGIC_1164.ALL; +use IEEE.NUMERIC_STD.ALL; + +entity recv_mux is +generic ( + BUFF_COUNT : integer := 16; + BUFF_BITS : integer := 4 -- 2^4 = 16 +); +port ( + rd_clk : in std_logic; + rd_buff : in std_logic_vector (BUFF_BITS - 1 downto 0); + rd_en : in std_logic; + rd_data : out std_logic_vector (63 downto 0) := (others => '0'); + rd_length : out std_logic_vector (8 downto 0) := (others => '0'); + rd_valid : out std_logic_vector (BUFF_COUNT - 1 downto 0) := (others => '0'); + + wr_clk : in std_logic; + wr_en : in std_logic; + wr_data : in std_logic_vector (63 downto 0); + wr_done : in std_logic; + wr_accept : out std_logic := '0' +); +end recv_mux; + +architecture arch of recv_mux is + type rd_data_t is array (0 to BUFF_COUNT - 1) of std_logic_vector(63 downto 0); + type rd_length_t is array (0 to BUFF_COUNT - 1) of std_logic_vector(8 downto 0); + + signal wr_en_i : std_logic_vector(BUFF_COUNT - 1 downto 0) := (others => '0'); + signal wr_done_i : std_logic_vector(BUFF_COUNT - 1 downto 0) := (others => '0'); + signal wr_accept_i : std_logic_vector(BUFF_COUNT - 1 downto 0) := (others => '0'); + signal wr_buff : integer range 0 to BUFF_COUNT - 1 := 0; + + signal rd_en_i : std_logic_vector(BUFF_COUNT - 1 downto 0) := (others => '0'); + signal rd_data_i : rd_data_t := (others => (others => '0')); + signal rd_length_i : rd_length_t := (others => (others => '0')); + signal rd_buff_i : integer range 0 to BUFF_COUNT - 1 := 0; +begin + rd_buff_i <= to_integer(unsigned(rd_buff)); + + recv_gen: for i in 0 to BUFF_COUNT - 1 generate + recv_buff : entity work.buff port map ( + wr_clk => wr_clk, + wr_en => wr_en_i(i), + wr_data => wr_data, + wr_done => wr_done_i(i), + wr_accept => wr_accept_i(i), + + rd_clk => rd_clk, + rd_en => rd_en_i(i), + rd_data => rd_data_i(i), + rd_length => rd_length_i(i), + rd_valid => rd_valid(i) + ); + + wr_en_i(i) <= wr_en when wr_buff = i else '0'; + wr_done_i(i) <= wr_done when wr_buff = i else '0'; + + rd_en_i(i) <= rd_en when rd_buff_i = i else '0'; + end generate recv_gen; + + rd_data <= rd_data_i(rd_buff_i); + rd_length <= rd_length_i(rd_buff_i); + + wr_accept <= wr_accept_i(wr_buff); + + process (wr_clk) + variable tmp_buff : integer range 0 to BUFF_COUNT - 1; + begin + if rising_edge(wr_clk) then + if wr_accept_i(wr_buff) = '0' then + for i in 0 to BUFF_COUNT - 1 loop + tmp_buff := (i + wr_buff) mod BUFF_COUNT; + + if wr_accept_i(tmp_buff) = '1' then + wr_buff <= tmp_buff; + exit; + end if; + end loop; + end if; + end if; + end process; +end arch; + diff --git a/netfpga10g/hdl/rx_eth.vhd b/netfpga10g/hdl/rx_eth.vhd new file mode 100644 index 0000000..fe6e65e --- /dev/null +++ b/netfpga10g/hdl/rx_eth.vhd @@ -0,0 +1,168 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity rx_eth is port ( + clk : in std_logic; + reset : in std_logic; + + xgmii_rxd : in std_logic_vector(63 downto 0); + xgmii_rxc : in std_logic_vector(7 downto 0); + + rx_data : out std_logic_vector(63 downto 0); + rx_start : out std_logic; + rx_end : out std_logic; + rx_rem : out integer range 0 to 7; + + start_count_out : out std_logic_vector(31 downto 0); + end_count_out : out std_logic_vector(31 downto 0) +); +end rx_eth; + +architecture arch of rx_eth is + constant IDLE : std_logic_vector(7 downto 0) := x"07"; + constant START : std_logic_vector(7 downto 0) := x"FB"; + constant TERMINATE : std_logic_vector(7 downto 0) := x"FD"; + constant ERR : std_logic_vector(7 downto 0) := x"FE"; + + constant PREAMBLE : std_logic_vector(7 downto 0) := "01010101"; + constant SFD : std_logic_vector(7 downto 0) := "11010101"; + + type lanes_t is array (0 to 7) of std_logic_vector(7 downto 0); + signal lanes_a : lanes_t; + signal lanes_b : lanes_t; + + signal control_a : std_logic_vector(7 downto 0); + signal control_b : std_logic_vector(7 downto 0); + + signal use_a : std_logic; + + signal start_count : unsigned(31 downto 0); + signal end_count : unsigned(31 downto 0); +begin + start_count_out <= std_logic_vector(start_count); + end_count_out <= std_logic_vector(end_count); + + rx_lanes_gen : for i in 0 to 7 generate + lanes_a(i) <= xgmii_rxd(7+8*i downto 8*i); + end generate rx_lanes_gen; + + control_a <= xgmii_rxc; + lanes_b(4) <= lanes_a(0); + lanes_b(5) <= lanes_a(1); + lanes_b(6) <= lanes_a(2); + lanes_b(7) <= lanes_a(3); + control_b(4) <= control_a(0); + control_b(5) <= control_a(1); + control_b(6) <= control_a(2); + control_b(7) <= control_a(3); + + rx_logic : process (clk, reset) begin + if reset = '1' then + rx_data <= (others => '0'); + rx_start <= '0'; + rx_end <= '0'; + rx_rem <= 0; + start_count <= (others => '0'); + end_count <= (others => '0'); + lanes_b(0) <= (others => '0'); + lanes_b(1) <= (others => '0'); + lanes_b(2) <= (others => '0'); + lanes_b(3) <= (others => '0'); + control_b(3 downto 0) <= (others => '0'); + use_a <= '1'; + + elsif rising_edge(clk) then + rx_start <= '0'; + rx_end <= '0'; + rx_rem <= 0; + + lanes_b(0) <= lanes_a(4); + lanes_b(1) <= lanes_a(5); + lanes_b(2) <= lanes_a(6); + lanes_b(3) <= lanes_a(7); + control_b(3 downto 0) <= control_a(7 downto 4); + + for i in 0 to 7 loop + if use_a = '1' then + rx_data(63-8*i downto 56-8*i) <= lanes_a(i); + else + rx_data(63-8*i downto 56-8*i) <= lanes_b(i); + end if; + end loop; + + if control_a(0) = '1' and lanes_a(0) = START then + rx_start <= '1'; + use_a <= '1'; + elsif control_b(0) = '1' and lanes_b(0) = START then + rx_start <= '1'; + use_a <= '0'; + start_count <= start_count + 1; + end if; + + if use_a = '1' then + if control_a(0) = '1' and (lanes_a(0) = TERMINATE or lanes_a(0) = ERR) then + rx_end <= '1'; + rx_rem <= 0; + elsif control_a(1) = '1' and (lanes_a(1) = TERMINATE or lanes_a(1) = ERR) then + rx_end <= '1'; + rx_rem <= 1; + elsif control_a(2) = '1' and (lanes_a(2) = TERMINATE or lanes_a(2) = ERR) then + rx_end <= '1'; + rx_rem <= 2; + elsif control_a(3) = '1' and (lanes_a(3) = TERMINATE or lanes_a(3) = ERR) then + rx_end <= '1'; + rx_rem <= 3; + elsif control_a(4) = '1' and (lanes_a(4) = TERMINATE or lanes_a(4) = ERR) then + rx_end <= '1'; + rx_rem <= 4; + elsif control_a(5) = '1' and (lanes_a(5) = TERMINATE or lanes_a(5) = ERR) then + rx_end <= '1'; + rx_rem <= 5; + elsif control_a(6) = '1' and (lanes_a(6) = TERMINATE or lanes_a(6) = ERR) then + rx_end <= '1'; + rx_rem <= 6; + elsif control_a(7) = '1' and (lanes_a(7) = TERMINATE or lanes_a(7) = ERR) then + rx_end <= '1'; + rx_rem <= 7; + end if; + else + if control_b(0) = '1' and (lanes_b(0) = TERMINATE or lanes_b(0) = ERR) then + rx_end <= '1'; + rx_rem <= 0; + end_count <= end_count + 1; + elsif control_b(1) = '1' and (lanes_b(1) = TERMINATE or lanes_b(1) = ERR) then + rx_end <= '1'; + rx_rem <= 1; + end_count <= end_count + 1; + elsif control_b(2) = '1' and (lanes_b(2) = TERMINATE or lanes_b(2) = ERR) then + rx_end <= '1'; + rx_rem <= 2; + end_count <= end_count + 1; + elsif control_b(3) = '1' and (lanes_b(3) = TERMINATE or lanes_b(3) = ERR) then + rx_end <= '1'; + rx_rem <= 3; + end_count <= end_count + 1; + elsif control_b(4) = '1' and (lanes_b(4) = TERMINATE or lanes_b(4) = ERR) then + rx_end <= '1'; + rx_rem <= 4; + end_count <= end_count + 1; + elsif control_b(5) = '1' and (lanes_b(5) = TERMINATE or lanes_b(5) = ERR) then + rx_end <= '1'; + rx_rem <= 5; + end_count <= end_count + 1; + elsif control_b(6) = '1' and (lanes_b(6) = TERMINATE or lanes_b(6) = ERR) then + rx_end <= '1'; + rx_rem <= 6; + end_count <= end_count + 1; + elsif control_b(7) = '1' and (lanes_b(7) = TERMINATE or lanes_b(7) = ERR) then + rx_end <= '1'; + rx_rem <= 7; + end_count <= end_count + 1; + end if; + end if; + end if; + end process; +end arch; + diff --git a/netfpga10g/hdl/send_mux.vhd b/netfpga10g/hdl/send_mux.vhd new file mode 100644 index 0000000..8d9f667 --- /dev/null +++ b/netfpga10g/hdl/send_mux.vhd @@ -0,0 +1,77 @@ + +library IEEE; +use IEEE.STD_LOGIC_1164.ALL; +use IEEE.NUMERIC_STD.ALL; + +entity send_mux is +generic ( + BUFF_COUNT : integer := 16; + BUFF_BITS : integer := 4 -- 2^4 = 16 +); + Port ( wr_clk : in STD_LOGIC; + wr_buff : in STD_LOGIC_VECTOR (BUFF_BITS - 1 downto 0); + wr_en : in STD_LOGIC; + wr_data : in STD_LOGIC_VECTOR (63 downto 0); + wr_done : in STD_LOGIC; + wr_cancel : in STD_LOGIC_VECTOR (BUFF_COUNT - 1 downto 0); + wr_accept : out STD_LOGIC_VECTOR (BUFF_COUNT - 1 downto 0) := (others => '0'); + rd_clk : in STD_LOGIC; + rd_en : in STD_LOGIC; + rd_data : out STD_LOGIC_VECTOR (63 downto 0) := (others => '0'); + rd_valid : out STD_LOGIC := '0'); +end send_mux; + +architecture arch of send_mux is + type rd_data_t is array (0 to BUFF_COUNT - 1) of std_logic_vector(63 downto 0); + + signal wr_en_i : std_logic_vector(BUFF_COUNT - 1 downto 0) := (others => '0'); + signal wr_done_i : std_logic_vector(BUFF_COUNT - 1 downto 0) := (others => '0'); + + signal rd_en_i : std_logic_vector(BUFF_COUNT - 1 downto 0) := (others => '0'); + signal rd_data_i : rd_data_t := (others => (others => '0')); + signal rd_valid_i : std_logic_vector(BUFF_COUNT - 1 downto 0) := (others => '0'); + signal rd_buff : integer range 0 to BUFF_COUNT - 1 := 0; +begin + send_gen: for i in 0 to BUFF_COUNT - 1 generate + send_buff : entity work.buff port map ( + wr_clk => wr_clk, + wr_en => wr_en_i(i), + wr_data => wr_data, + wr_done => wr_done_i(i), + wr_cancel => wr_cancel(i), + wr_accept => wr_accept(i), + + rd_clk => rd_clk, + rd_en => rd_en_i(i), + rd_data => rd_data_i(i), + rd_length => open, + rd_valid => rd_valid_i(i) + ); + + wr_en_i(i) <= wr_en when to_integer(unsigned(wr_buff)) = i else '0'; + wr_done_i(i) <= wr_done when to_integer(unsigned(wr_buff)) = i else '0'; + + rd_en_i(i) <= rd_en when rd_buff = i else '0'; + end generate send_gen; + + rd_data <= rd_data_i(rd_buff); + rd_valid <= rd_valid_i(rd_buff); + + process (rd_clk) + variable tmp_buff : integer range 0 to BUFF_COUNT - 1; + begin + if rising_edge(rd_clk) then + if rd_valid_i(rd_buff) = '0' then + for i in 0 to BUFF_COUNT - 1 loop + tmp_buff := (i + rd_buff) mod BUFF_COUNT; + + if rd_valid_i(tmp_buff) = '1' then + rd_buff <= tmp_buff; + exit; + end if; + end loop; + end if; + end if; + end process; +end arch; + diff --git a/netfpga10g/hdl/system_loop.vhd b/netfpga10g/hdl/system_loop.vhd new file mode 100644 index 0000000..79031c3 --- /dev/null +++ b/netfpga10g/hdl/system_loop.vhd @@ -0,0 +1,253 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; +library unisim; +use unisim.vcomponents.all; + +entity system_loop is +generic ( + BUFF_COUNT : integer := 16; + BUFF_BITS : integer := 4 -- 2^4 = 16 +); +port ( + eth_clk : in std_logic; + pcie_clk : in std_logic; + + rx_frame : in std_logic_vector(63 downto 0); + rx_sof : in std_logic; + rx_eof : in std_logic; + rx_valid : in std_logic; + rx_bar0 : in std_logic; + + tx_frame : out std_logic_vector(63 downto 0); + tx_sof : out std_logic; + tx_eof : out std_logic; + tx_half : out std_logic; + tx_valid : out std_logic; + tx_ready : in std_logic; + + interrupt : out std_logic; + interrupt_rdy : in std_logic; + + max_read : in std_logic_vector(2 downto 0); + max_write : in std_logic_vector(2 downto 0); + + local : in std_logic_vector(15 downto 0); + + xgmii_rxd : in std_logic_vector(63 downto 0); + xgmii_rxc : in std_logic_vector(7 downto 0); + + xgmii_txd : out std_logic_vector(63 downto 0); + xgmii_txc : out std_logic_vector(7 downto 0); + + mdio_command : out std_logic_vector(0 to 27); + mdio_data : in std_logic_vector(0 to 15); + mdio_enable : out std_logic; + mdio_done : in std_logic +); +end system_loop; + +architecture arch of system_loop is + -- send mux + signal send_rd_en : std_logic; + signal send_rd_data : std_logic_vector (63 downto 0); + signal send_rd_valid : std_logic; + + signal send_wr_buff : std_logic_vector (BUFF_BITS - 1 downto 0) := (others => '0'); + signal send_wr_en : std_logic := '0'; + signal send_wr_data : std_logic_vector (63 downto 0) := (others => '0'); + signal send_wr_done : std_logic := '0'; + signal send_wr_cancel : std_logic_vector (BUFF_COUNT - 1 downto 0); + signal send_wr_accept : std_logic_vector (BUFF_COUNT - 1 downto 0); + + -- recv mux + signal recv_wr_en : std_logic; + signal recv_wr_data : std_logic_vector (63 downto 0); + signal recv_wr_done : std_logic; + signal recv_wr_accept : std_logic; + + signal recv_rd_buff : std_logic_vector (BUFF_BITS - 1 downto 0) := (others => '0'); + signal recv_rd_en : std_logic := '0'; + signal recv_rd_data : std_logic_vector (63 downto 0); + signal recv_rd_length : std_logic_vector (8 downto 0); + signal recv_rd_valid : std_logic_vector (BUFF_COUNT - 1 downto 0); + + -- pcie_rx + signal rx_read : std_logic; + signal rx_write : std_logic; + signal rx_complete : std_logic; + signal rx_data : std_logic_vector(63 downto 0); + signal rx_address : std_logic_vector(63 downto 3); + signal rx_tag : std_logic_vector(4 downto 0); + + signal remote : std_logic_vector(23 downto 0); + + -- pcie_tx + signal tx_read : std_logic; + signal tx_write : std_logic; + signal tx_complete : std_logic; + signal tx_data : std_logic_vector(63 downto 0); + signal tx_address : std_logic_vector(63 downto 3); + signal tx_length : std_logic_vector(8 downto 0); + signal tx_tag : std_logic_vector(4 downto 0); + signal tx_accept : std_logic; + signal tx_done : std_logic; +begin + eth_rx : entity work.eth_rx port map ( + clk => eth_clk, + + wr_en => recv_wr_en, + wr_data => recv_wr_data, + wr_done => recv_wr_done, + wr_accept => recv_wr_accept, + + xgmii_rxd => xgmii_rxd, + xgmii_rxc => xgmii_rxc + ); + + eth_tx : entity work.eth_tx port map ( + clk => eth_clk, + + rd_en => send_rd_en, + rd_data => send_rd_data, + rd_valid => send_rd_valid, + + xgmii_txd => xgmii_txd, + xgmii_txc => xgmii_txc + ); + + send_mux : entity work.send_mux + generic map ( + BUFF_COUNT => BUFF_COUNT, + BUFF_BITS => BUFF_BITS + ) + port map ( + wr_clk => pcie_clk, + wr_buff => send_wr_buff, + wr_en => send_wr_en, + wr_data => send_wr_data, + wr_done => send_wr_done, + wr_cancel => send_wr_cancel, + wr_accept => send_wr_accept, + + rd_clk => eth_clk, + rd_en => send_rd_en, + rd_data => send_rd_data, + rd_valid => send_rd_valid + ); + + recv_mux : entity work.recv_mux + generic map ( + BUFF_COUNT => BUFF_COUNT, + BUFF_BITS => BUFF_BITS + ) + port map ( + rd_clk => pcie_clk, + rd_buff => recv_rd_buff, + rd_en => recv_rd_en, + rd_data => recv_rd_data, + rd_length => recv_rd_length, + rd_valid => recv_rd_valid, + + wr_clk => eth_clk, + wr_en => recv_wr_en, + wr_data => recv_wr_data, + wr_done => recv_wr_done, + wr_accept => recv_wr_accept + ); + + engine : entity work.engine + generic map ( + BUFF_COUNT => BUFF_COUNT, + BUFF_BITS => BUFF_BITS + ) + port map ( + clk => pcie_clk, + + rd_buff => recv_rd_buff, + rd_en => recv_rd_en, + rd_data => recv_rd_data, + rd_length => recv_rd_length, + rd_valid => recv_rd_valid, + + wr_buff => send_wr_buff, + wr_en => send_wr_en, + wr_data => send_wr_data, + wr_done => send_wr_done, + wr_cancel => send_wr_cancel, + wr_accept => send_wr_accept, + + rx_read => rx_read, + rx_write => rx_write, + rx_complete => rx_complete, + rx_data => rx_data, + rx_address => rx_address, + rx_tag => rx_tag, + + tx_read => tx_read, + tx_write => tx_write, + tx_complete => tx_complete, + tx_data => tx_data, + tx_address => tx_address, + tx_length => tx_length, + tx_tag => tx_tag, + tx_accept => tx_accept, + tx_done => tx_done, + + interrupt => interrupt, + interrupt_rdy => interrupt_rdy, + + max_read => max_read, + max_write => max_write, + + mdio_command => mdio_command, + mdio_data => mdio_data, + mdio_enable => mdio_enable, + mdio_done => mdio_done + ); + + pcie_rx : entity work.pcie_rx port map ( + clk => pcie_clk, + + frame => rx_frame, + sof => rx_sof, + eof => rx_eof, + valid => rx_valid, + + read => rx_read, + write => rx_write, + complete => rx_complete, + data => rx_data, + address => rx_address, + tag => rx_tag, + remote => remote, + + bar0 => rx_bar0 + ); + + pcie_tx : entity work.pcie_tx port map ( + clk => pcie_clk, + + frame => tx_frame, + sof => tx_sof, + eof => tx_eof, + half => tx_half, + valid => tx_valid, + ready => tx_ready, + + read => tx_read, + write => tx_write, + complete => tx_complete, + data => tx_data, + address => tx_address, + length => tx_length, + tag => tx_tag, + local => local, + remote => remote, + accept => tx_accept, + done => tx_done + ); + +end arch; + diff --git a/netfpga10g/hdl/top.vhd b/netfpga10g/hdl/top.vhd new file mode 100644 index 0000000..83a5002 --- /dev/null +++ b/netfpga10g/hdl/top.vhd @@ -0,0 +1,243 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +Library UNISIM; +use UNISIM.vcomponents.all; + +entity top is port ( + led1 : out std_logic; + led2 : out std_logic; + led3 : out std_logic; + + pcie_clk_p : in std_logic; + pcie_clk_n : in std_logic; + clk25 : in std_logic; + clk100 : in std_logic; + + pci_exp_rxn : in std_logic_vector(7 downto 0); + pci_exp_rxp : in std_logic_vector(7 downto 0); + pci_exp_txn : out std_logic_vector(7 downto 0); + pci_exp_txp : out std_logic_vector(7 downto 0); + + mdio : inout std_logic; + mdc : out std_logic; + phy_reset_n : out std_logic; + + xaui0_clk_p : in std_logic; + xaui0_clk_n : in std_logic; + xaui0_tx_l0_p : out std_logic; + xaui0_tx_l0_n : out std_logic; + xaui0_tx_l1_p : out std_logic; + xaui0_tx_l1_n : out std_logic; + xaui0_tx_l2_p : out std_logic; + xaui0_tx_l2_n : out std_logic; + xaui0_tx_l3_p : out std_logic; + xaui0_tx_l3_n : out std_logic; + xaui0_rx_l0_p : in std_logic; + xaui0_rx_l0_n : in std_logic; + xaui0_rx_l1_p : in std_logic; + xaui0_rx_l1_n : in std_logic; + xaui0_rx_l2_p : in std_logic; + xaui0_rx_l2_n : in std_logic; + xaui0_rx_l3_p : in std_logic; + xaui0_rx_l3_n : in std_logic +); +end top; + +architecture arch of top is + signal clk125 : std_logic; + signal reset125 : std_logic; + + signal count25 : unsigned(6 downto 0) := (others => '0'); + signal reset25 : std_logic := '1'; + + signal clk50 : std_logic; + signal clk156 : std_logic; + + signal rx_frame : std_logic_vector(63 downto 0); + signal rx_sof : std_logic; + signal rx_eof : std_logic; + signal rx_valid : std_logic; + signal rx_bar0 : std_logic; + + signal tx_frame : std_logic_vector(63 downto 0); + signal tx_sof : std_logic; + signal tx_eof : std_logic; + signal tx_half : std_logic; + signal tx_valid : std_logic; + signal tx_ready : std_logic; + + signal interrupt : std_logic; + signal interrupt_rdy : std_logic; + + signal max_read : std_logic_vector(2 downto 0); + signal max_write : std_logic_vector(2 downto 0); + + signal local : std_logic_vector(15 downto 0); + + signal xgmii_rxd : std_logic_vector(63 downto 0); + signal xgmii_rxc : std_logic_vector(7 downto 0); + signal xgmii_txd : std_logic_vector(63 downto 0); + signal xgmii_txc : std_logic_vector(7 downto 0); + + signal mdio_command : std_logic_vector(0 to 27); + signal mdio_data : std_logic_vector(0 to 15); + signal mdio_enable : std_logic; + signal mdio_done : std_logic; + + signal mdio_in : std_logic; + signal mdio_out : std_logic; + signal mdio_Z : std_logic; +begin + led1 <= '1'; + led2 <= '0'; + led3 <= '1'; + + process (clk25) begin + if rising_edge(clk25) then + if count25 = 100 then + reset25 <= '0'; + else + count25 <= count25 + 1; + end if; + end if; + end process; + + process (clk100, reset125) begin + if reset125 = '1' then + clk50 <= '0'; + elsif rising_edge(clk100) then + clk50 <= not clk50; + end if; + end process; + + pcie_wrapper : entity work.pcie_wrapper port map ( + pcie_clk_p => pcie_clk_p, + pcie_clk_n => pcie_clk_n, + reset25 => reset25, + + clk125 => clk125, + reset125 => reset125, + + pci_exp_rxn => pci_exp_rxn, + pci_exp_rxp => pci_exp_rxp, + pci_exp_txn => pci_exp_txn, + pci_exp_txp => pci_exp_txp, + + rx_frame => rx_frame, + rx_sof => rx_sof, + rx_eof => rx_eof, + rx_valid => rx_valid, + + tx_frame => tx_frame, + tx_sof => tx_sof, + tx_eof => tx_eof, + tx_half => tx_half, + tx_valid => tx_valid, + tx_ready => tx_ready, + + bus_dev_func => local, + + max_read => max_read, + max_write => max_write, + + interrupt => interrupt, + interrupt_rdy => interrupt_rdy, + + bar0 => rx_bar0 + ); + + system_loop: entity work.system_loop port map ( + eth_clk => clk156, + pcie_clk => clk125, + + rx_frame => rx_frame, + rx_sof => rx_sof, + rx_eof => rx_eof, + rx_valid => rx_valid, + rx_bar0 => rx_bar0, + + tx_frame => tx_frame, + tx_sof => tx_sof, + tx_eof => tx_eof, + tx_half => tx_half, + tx_valid => tx_valid, + tx_ready => tx_ready, + + interrupt => interrupt, + interrupt_rdy => interrupt_rdy, + + max_read => max_read, + max_write => max_write, + + local => local, + + xgmii_rxd => xgmii_rxd, + xgmii_rxc => xgmii_rxc, + + xgmii_txd => xgmii_txd, + xgmii_txc => xgmii_txc, + + mdio_command => mdio_command, + mdio_data => mdio_data, + mdio_enable => mdio_enable, + mdio_done => mdio_done + ); + + xaui : entity work.xaui_top + generic map ( + REVERSE_LANES => '1' + ) + port map ( + dclk => clk50, + reset => reset125, + xgmii_txd => xgmii_txd, + xgmii_txc => xgmii_txc, + xgmii_rxd => xgmii_rxd, + xgmii_rxc => xgmii_rxc, + clk156_out => clk156, + refclk_p => xaui0_clk_p, + refclk_n => xaui0_clk_n, + xaui_tx_l0_p => xaui0_tx_l0_p, + xaui_tx_l0_n => xaui0_tx_l0_n, + xaui_tx_l1_p => xaui0_tx_l1_p, + xaui_tx_l1_n => xaui0_tx_l1_n, + xaui_tx_l2_p => xaui0_tx_l2_p, + xaui_tx_l2_n => xaui0_tx_l2_n, + xaui_tx_l3_p => xaui0_tx_l3_p, + xaui_tx_l3_n => xaui0_tx_l3_n, + xaui_rx_l0_p => xaui0_rx_l0_p, + xaui_rx_l0_n => xaui0_rx_l0_n, + xaui_rx_l1_p => xaui0_rx_l1_p, + xaui_rx_l1_n => xaui0_rx_l1_n, + xaui_rx_l2_p => xaui0_rx_l2_p, + xaui_rx_l2_n => xaui0_rx_l2_n, + xaui_rx_l3_p => xaui0_rx_l3_p, + xaui_rx_l3_n => xaui0_rx_l3_n + ); + + mdio_iobuf : IOBUF port map ( + O => mdio_in, + IO => mdio, + I => mdio_out, + T => mdio_Z + ); + + mdio_module : entity work.mdio port map ( + clk125 => clk125, + reset125 => reset125, + + command => mdio_command, + data_out => mdio_data, + enable => mdio_enable, + done => mdio_done, + + mdio_in => mdio_in, + mdio_out => mdio_out, + mdio_Z => mdio_Z, + mdc => mdc, + phy_reset_n => phy_reset_n + ); +end arch; diff --git a/netfpga10g/hdl/tx_eth.vhd b/netfpga10g/hdl/tx_eth.vhd new file mode 100644 index 0000000..fab9cac --- /dev/null +++ b/netfpga10g/hdl/tx_eth.vhd @@ -0,0 +1,96 @@ + +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity tx_eth is port ( + clk : in std_logic; + reset : in std_logic; + + xgmii_txd : out std_logic_vector(63 downto 0); + xgmii_txc : out std_logic_vector(7 downto 0); + + tx_data : in std_logic_vector(63 downto 0); + tx_start : in std_logic; + tx_end : in std_logic; + tx_rem : in integer range 0 to 7; + + start_count_out : out std_logic_vector(31 downto 0); + end_count_out : out std_logic_vector(31 downto 0) +); +end tx_eth; + +architecture arch of tx_eth is + constant IDLE : std_logic_vector(7 downto 0) := x"07"; + constant START : std_logic_vector(7 downto 0) := x"FB"; + constant TERMINATE : std_logic_vector(7 downto 0) := x"FD"; + + constant PREAMBLE : std_logic_vector(7 downto 0) := "01010101"; + constant SFD : std_logic_vector(7 downto 0) := "11010101"; + + type lanes_t is array (0 to 7) of std_logic_vector(7 downto 0); + signal lanes : lanes_t; + + signal in_packet : std_logic; + + signal start_count : unsigned(31 downto 0); + signal end_count : unsigned(31 downto 0); +begin + start_count_out <= std_logic_vector(start_count); + end_count_out <= std_logic_vector(end_count); + + tx_lanes_gen : for i in 0 to 7 generate + xgmii_txd(7+8*i downto 8*i) <= lanes(i); + end generate tx_lanes_gen; + + tx_logic : process (clk, reset) begin + if reset = '1' then + in_packet <= '0'; + start_count <= (others => '0'); + end_count <= (others => '0'); + + for i in 0 to 7 loop + lanes(i) <= IDLE; + xgmii_txc(i) <= '1'; + end loop; + + elsif rising_edge(clk) then + for i in 0 to 7 loop + lanes(i) <= IDLE; + xgmii_txc(i) <= '1'; + end loop; + + if tx_start = '1' then + in_packet <= '1'; + lanes(0) <= START; + xgmii_txc(0) <= '1'; + lanes(1 to 6) <= (others => PREAMBLE); + xgmii_txc(6 downto 1) <= (others => '0'); + lanes(7) <= SFD; + xgmii_txc(7) <= '0'; + start_count <= start_count + 1; + + elsif tx_end = '1' then + in_packet <= '0'; + end_count <= end_count + 1; + + for i in 0 to 7 loop + if i < tx_rem then + lanes(i) <= tx_data(63-8*i downto 56-8*i); + xgmii_txc(i) <= '0'; + elsif i = tx_rem then + lanes(i) <= TERMINATE; + xgmii_txc(i) <= '1'; + end if; + end loop; + + elsif in_packet = '1' then + for i in 0 to 7 loop + lanes(i) <= tx_data(63-8*i downto 56-8*i); + xgmii_txc(i) <= '0'; + end loop; + end if; + end if; + end process; +end arch; + |