Subversion Repositories pcie_ds_dma

-------------------------------------------------------------------------------

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-------------------------------------------------------------------------------

-- Project    : Virtex-6 Integrated Block for PCI Express

-- File       : axi_basic_tx.vhd

-- Version    : 2.3

--

-- Description:

--AXI to TRN TX module. Instantiates pipeline and throttle control TX

--  submodules.

--

--  Notes:

--  Optional notes section.

--

--  Hierarchical:

--    axi_basic_top

--      axi_basic_tx

--

--------------------------------------------------------------------------------

-- Library Declarations

--------------------------------------------------------------------------------

LIBRARY ieee;

   USE ieee.std_logic_1164.all;

   USE ieee.std_logic_unsigned.all;

ENTITY axi_basic_tx IS

   GENERIC (

      C_DATA_WIDTH            : INTEGER := 128;          -- RX/TX interface data width

      C_FAMILY                : STRING  := "X7";         -- Targeted FPGA family

      C_ROOT_PORT             : BOOLEAN := FALSE;        -- PCIe block is in root port mode

      C_PM_PRIORITY           : BOOLEAN := FALSE;        -- Disable TX packet boundary thrtl

      TCQ                     : INTEGER := 1;            -- Clock to Q time

      C_REM_WIDTH             : INTEGER :=  1;           -- trem/rrem width

      C_STRB_WIDTH            : INTEGER :=  4            -- TSTRB width

   );

   PORT (

     -----------------------------------------------

     -- User Design I/O

     -----------------------------------------------

     -- AXI TX

     -------------

      S_AXIS_TX_TDATA         : IN STD_LOGIC_VECTOR(C_DATA_WIDTH - 1 DOWNTO 0);

      S_AXIS_TX_TVALID        : IN STD_LOGIC;

      S_AXIS_TX_TREADY        : OUT STD_LOGIC;

      S_AXIS_TX_TSTRB         : IN STD_LOGIC_VECTOR(C_STRB_WIDTH - 1 DOWNTO 0);

      S_AXIS_TX_TLAST         : IN STD_LOGIC;

      S_AXIS_TX_TUSER         : IN STD_LOGIC_VECTOR(3 DOWNTO 0);

     -- User Misc.

     -------------

      USER_TURNOFF_OK         : IN STD_LOGIC;

      USER_TCFG_GNT           : IN STD_LOGIC;

      -----------------------------------------------

      -- PCIe Block I/O

      -----------------------------------------------

      -- TRN TX

      -------------

      TRN_TD                  : OUT STD_LOGIC_VECTOR(C_DATA_WIDTH - 1 DOWNTO 0);

      TRN_TSOF                : OUT STD_LOGIC;

      TRN_TEOF                : OUT STD_LOGIC;

      TRN_TSRC_RDY            : OUT STD_LOGIC;

      TRN_TDST_RDY            : IN STD_LOGIC;

      TRN_TSRC_DSC            : OUT STD_LOGIC;

      TRN_TREM                : OUT STD_LOGIC_VECTOR(C_REM_WIDTH - 1 DOWNTO 0);

      TRN_TERRFWD             : OUT STD_LOGIC;

      TRN_TSTR                : OUT STD_LOGIC;

      TRN_TBUF_AV             : IN STD_LOGIC_VECTOR(5 DOWNTO 0);

      TRN_TECRC_GEN           : OUT STD_LOGIC;

     -- TRN Misc.

     -----------

       TRN_TCFG_REQ            : IN STD_LOGIC;

       TRN_TCFG_GNT            : OUT STD_LOGIC;

       TRN_LNK_UP              : IN STD_LOGIC;

     -- 7 Series/Virtex6 PM

     -----------

       CFG_PCIE_LINK_STATE     : IN STD_LOGIC_VECTOR(2 DOWNTO 0);

     -- Virtex6 PM

     -----------

       CFG_PM_SEND_PME_TO      : IN STD_LOGIC;

       CFG_PMCSR_POWERSTATE    : IN STD_LOGIC_VECTOR(1 DOWNTO 0);

       TRN_RDLLP_DATA          : IN STD_LOGIC_VECTOR(31 DOWNTO 0);

       TRN_RDLLP_SRC_RDY       : IN STD_LOGIC;

     -- Virtex6/Spartan6 PM

     -----------

       CFG_TO_TURNOFF          : IN STD_LOGIC;

       CFG_TURNOFF_OK          : OUT STD_LOGIC;

     -- System

     -----------

      USER_CLK                : IN STD_LOGIC;

      USER_RST                : IN STD_LOGIC

   );

END axi_basic_tx;

ARCHITECTURE trans OF axi_basic_tx IS

   SIGNAL tready_thrtl           : STD_LOGIC;

   -- Declare intermediate signals for referenced outputs

   SIGNAL s_axis_tx_tready_xhdl1 : STD_LOGIC;

   SIGNAL trn_td_xhdl3           : STD_LOGIC_VECTOR(C_DATA_WIDTH - 1 DOWNTO 0);

   SIGNAL trn_tsof_xhdl8         : STD_LOGIC;

   SIGNAL trn_teof_xhdl5         : STD_LOGIC;

   SIGNAL trn_tsrc_rdy_xhdl10    : STD_LOGIC;

   SIGNAL trn_tsrc_dsc_xhdl9     : STD_LOGIC;

   SIGNAL trn_trem_xhdl7         : STD_LOGIC_VECTOR(C_REM_WIDTH - 1 DOWNTO 0);

   SIGNAL trn_terrfwd_xhdl6      : STD_LOGIC;

   SIGNAL trn_tstr_xhdl11        : STD_LOGIC;

   SIGNAL trn_tecrc_gen_xhdl4    : STD_LOGIC;

   SIGNAL trn_tcfg_gnt_xhdl2     : STD_LOGIC;

   SIGNAL cfg_turnoff_ok_xhdl0   : STD_LOGIC;

   COMPONENT axi_basic_tx_thrtl_ctl IS

   GENERIC (

      C_DATA_WIDTH              : INTEGER := 128;

      C_FAMILY                  : STRING  := "X7";

      C_ROOT_PORT               : BOOLEAN := FALSE;

      TCQ                       : INTEGER := 1

   );

   PORT (

      S_AXIS_TX_TDATA         : IN STD_LOGIC_VECTOR(C_DATA_WIDTH - 1 DOWNTO 0);

      S_AXIS_TX_TVALID          : IN STD_LOGIC;

      S_AXIS_TX_TUSER           : IN STD_LOGIC_VECTOR(3 DOWNTO 0);

      S_AXIS_TX_TLAST           : IN STD_LOGIC;

      USER_TURNOFF_OK           : IN STD_LOGIC;

      USER_TCFG_GNT             : IN STD_LOGIC;

      TRN_TBUF_AV               : IN STD_LOGIC_VECTOR(5 DOWNTO 0);

      TRN_TDST_RDY              : IN STD_LOGIC;

      TRN_TCFG_REQ              : IN STD_LOGIC;

      TRN_TCFG_GNT              : OUT STD_LOGIC;

      TRN_LNK_UP                : IN STD_LOGIC;

      CFG_PCIE_LINK_STATE       : IN STD_LOGIC_VECTOR(2 DOWNTO 0);

      CFG_PM_SEND_PME_TO        : IN STD_LOGIC;

      CFG_PMCSR_POWERSTATE      : IN STD_LOGIC_VECTOR(1 DOWNTO 0);

      TRN_RDLLP_DATA            : IN STD_LOGIC_VECTOR(31 DOWNTO 0);

      TRN_RDLLP_SRC_RDY         : IN STD_LOGIC;

      CFG_TO_TURNOFF            : IN STD_LOGIC;

      CFG_TURNOFF_OK            : OUT STD_LOGIC;

      TREADY_THRTL              : OUT STD_LOGIC;

      USER_CLK                  : IN STD_LOGIC;

      USER_RST                  : IN STD_LOGIC

   );

   END COMPONENT axi_basic_tx_thrtl_ctl;

  -----------------------------------------------

  -- TX Data Pipeline

  -----------------------------------------------

   COMPONENT axi_basic_tx_pipeline IS

   GENERIC (

      C_DATA_WIDTH              : INTEGER := 128;

      C_PM_PRIORITY             : BOOLEAN := FALSE;

      TCQ                       : INTEGER := 1;

      C_REM_WIDTH               : INTEGER :=  1;

      C_STRB_WIDTH              : INTEGER := 8

   );

   PORT (

    -- Incoming AXI RX

    -------------

      S_AXIS_TX_TDATA         : IN STD_LOGIC_VECTOR(C_DATA_WIDTH - 1 DOWNTO 0);

      S_AXIS_TX_TVALID        : IN STD_LOGIC;

      S_AXIS_TX_TREADY        : OUT STD_LOGIC;

      S_AXIS_TX_TSTRB         : IN STD_LOGIC_VECTOR(C_STRB_WIDTH - 1 DOWNTO 0);

      S_AXIS_TX_TLAST         : IN STD_LOGIC;

      S_AXIS_TX_TUSER         : IN STD_LOGIC_VECTOR(3 DOWNTO 0);

    -- Outgoing TRN TX

    -------------

      TRN_TD                  : OUT STD_LOGIC_VECTOR(C_DATA_WIDTH - 1 DOWNTO 0);

      TRN_TSOF                : OUT STD_LOGIC;

      TRN_TEOF                : OUT STD_LOGIC;

      TRN_TSRC_RDY            : OUT STD_LOGIC;

      TRN_TDST_RDY            : IN STD_LOGIC;

      TRN_TSRC_DSC            : OUT STD_LOGIC;

      TRN_TREM                : OUT STD_LOGIC_VECTOR(C_REM_WIDTH - 1 DOWNTO 0);

      TRN_TERRFWD             : OUT STD_LOGIC;

      TRN_TSTR                : OUT STD_LOGIC;

      TRN_TECRC_GEN           : OUT STD_LOGIC;

      TRN_LNK_UP              : IN  STD_LOGIC;

    -- System

    -------------

      TREADY_THRTL            : IN STD_LOGIC;

      USER_CLK                : IN STD_LOGIC;

      USER_RST                : IN STD_LOGIC

   );

END COMPONENT axi_basic_tx_pipeline;

BEGIN

   -- Drive referenced outputs

   S_AXIS_TX_TREADY      <= s_axis_tx_tready_xhdl1;

   TRN_TD                <= trn_td_xhdl3;

   TRN_TSOF              <= trn_tsof_xhdl8;

   TRN_TEOF              <= trn_teof_xhdl5;

   TRN_TSRC_RDY          <= trn_tsrc_rdy_xhdl10;

   TRN_TSRC_DSC          <= trn_tsrc_dsc_xhdl9;

   TRN_TREM              <= trn_trem_xhdl7;

   TRN_TERRFWD           <= trn_terrfwd_xhdl6;

   TRN_TSTR              <= trn_tstr_xhdl11;

   TRN_TECRC_GEN         <= trn_tecrc_gen_xhdl4;

   TRN_TCFG_GNT          <= trn_tcfg_gnt_xhdl2;

   CFG_TURNOFF_OK        <= cfg_turnoff_ok_xhdl0;

   tx_pipeline_inst : axi_basic_tx_pipeline

      GENERIC MAP (

         C_DATA_WIDTH     => C_DATA_WIDTH,

         C_PM_PRIORITY    => C_PM_PRIORITY,

         TCQ              => TCQ,

         C_REM_WIDTH      => C_REM_WIDTH,

         C_STRB_WIDTH     => C_STRB_WIDTH

      )

      PORT MAP (

         S_AXIS_TX_TDATA   => S_AXIS_TX_TDATA,

         S_AXIS_TX_TREADY  => s_axis_tx_tready_xhdl1,

         S_AXIS_TX_TVALID  => S_AXIS_TX_TVALID,

         S_AXIS_TX_TSTRB   => S_AXIS_TX_TSTRB,

         S_AXIS_TX_TLAST   => S_AXIS_TX_TLAST,

         S_AXIS_TX_TUSER   => S_AXIS_TX_TUSER,

         TRN_TD            => trn_td_xhdl3,

         TRN_TSOF          => trn_tsof_xhdl8,

         TRN_TEOF          => trn_teof_xhdl5,

         TRN_TSRC_RDY      => trn_tsrc_rdy_xhdl10,

         TRN_TDST_RDY      => TRN_TDST_RDY,

         TRN_TSRC_DSC      => trn_tsrc_dsc_xhdl9,

         TRN_TREM          => trn_trem_xhdl7,

         TRN_TERRFWD       => trn_terrfwd_xhdl6,

         TRN_TSTR          => trn_tstr_xhdl11,

         TRN_TECRC_GEN     => trn_tecrc_gen_xhdl4,

         TRN_LNK_UP        => trn_lnk_up,

         TREADY_THRTL      => TREADY_THRTL,

         USER_CLK          => USER_CLK,

         USER_RST          => USER_RST

      );

  -------------------------------------------------

  -- TX Throttle Controller

  -------------------------------------------------

   xhdl12 : IF (NOT(C_PM_PRIORITY)) GENERATE

           tx_thrl_ctl_inst : axi_basic_tx_thrtl_ctl

           GENERIC MAP (

                               C_DATA_WIDTH    => C_DATA_WIDTH,

                               C_FAMILY        => C_FAMILY,

                               C_ROOT_PORT     => C_ROOT_PORT,

                               TCQ             => TCQ

                       )

           PORT MAP (

                            -- Outgoing AXI TX

                            -------------

                            S_AXIS_TX_TDATA       => S_AXIS_TX_TDATA,

                            S_AXIS_TX_TVALID      => S_AXIS_TX_TVALID,

                            S_AXIS_TX_TUSER       => S_AXIS_TX_TUSER,

                            S_AXIS_TX_TLAST       => S_AXIS_TX_TLAST,

                            -- User Misc.

                            -------------

                            USER_TURNOFF_OK       => USER_TURNOFF_OK,

                            USER_TCFG_GNT         => USER_TCFG_GNT,

                            -- Incoming TRN RX

                            -------------

                            TRN_TBUF_AV           => TRN_TBUF_AV,

                            TRN_TDST_RDY          => TRN_TDST_RDY,

                            -- TRN Misc.

                            -------------

                            TRN_TCFG_REQ          => TRN_TCFG_REQ,

                            TRN_TCFG_GNT          => trn_tcfg_gnt_xhdl2,

                            TRN_LNK_UP            => trn_lnk_up,

                            -- 7 Seriesq/Virtex6 PM

                            -------------

                            CFG_PCIE_LINK_STATE   => CFG_PCIE_LINK_STATE,

                            -- Virtex6 PM

                            -------------

                            CFG_PM_SEND_PME_TO    => CFG_PM_SEND_PME_TO,

                            CFG_PMCSR_POWERSTATE  => CFG_PMCSR_POWERSTATE,

                            TRN_RDLLP_DATA        => TRN_RDLLP_DATA,

                            TRN_RDLLP_SRC_RDY     => TRN_RDLLP_SRC_RDY,

                            -- Spartan6 PM

                            -------------

                            CFG_TO_TURNOFF        => CFG_TO_TURNOFF,

                            CFG_TURNOFF_OK        => cfg_turnoff_ok_xhdl0,

                            -- System

                            -------------

                            TREADY_THRTL          => TREADY_THRTL,

                            USER_CLK              => USER_CLK,

                            USER_RST              => USER_RST

     );

     END GENERATE;

   xhdl13 : IF (C_PM_PRIORITY) GENERATE

      TREADY_THRTL         <= '0';

      cfg_turnoff_ok_xhdl0 <= USER_TURNOFF_OK;

      trn_tcfg_gnt_xhdl2   <= USER_TCFG_GNT;

   END GENERATE;

END trans;