wr_endpoint: don't make RTU request when frame was not stored in the rx buffer

When rx buffer is full when new SOF arrives, the whole frame is dropped and not stored in the buffer. However, RTU request was still generated by the ep_rtu_header_extract. This patch prevents ep_rtu_header_extract from generating rtu request, when rxbuf is full on SOF.

wr_endpoint: don't make RTU request when frame was not stored in the rx buffer
When rx buffer is full when new SOF arrives, the whole frame is dropped and not stored in the buffer. However, RTU request was still generated by the ep_rtu_header_extract. This patch prevents ep_rtu_header_extract from generating rtu request, when rxbuf is full on SOF.
37cfba4e · Grzegorz Daniluk · 6a12587f · 37cfba4e · 37cfba4e · 37cfba4e
Commit 37cfba4e authored May 05, 2015 by Grzegorz Daniluk
Showing with 7 additions and 4 deletions

endpoint_private_pkg.vhd modules/wr_endpoint/endpoint_private_pkg.vhd +2 -1

ep_rtu_header_extract.vhd modules/wr_endpoint/ep_rtu_header_extract.vhd +3 -2

ep_rx_path.vhd modules/wr_endpoint/ep_rx_path.vhd +2 -1

No files found.
--- a/modules/wr_endpoint/endpoint_private_pkg.vhd
+++ b/modules/wr_endpoint/endpoint_private_pkg.vhd
@@ -496,7 +496,8 @@ package endpoint_private_pkg is
      rtu_rq_o         : out t_ep_internal_rtu_request;
      rtu_full_i       : in  std_logic;
      rtu_rq_abort_o   : out std_logic;
-      rtu_rq_valid_o   : out std_logic);
+      rtu_rq_valid_o   : out std_logic;
+      rxbuf_full_i     : in  std_logic);
  end component;

  component ep_rx_early_address_match

--- a/modules/wr_endpoint/ep_rtu_header_extract.vhd
+++ b/modules/wr_endpoint/ep_rtu_header_extract.vhd
@@ -29,7 +29,8 @@ entity ep_rtu_header_extract is
    rtu_rq_o       : out t_ep_internal_rtu_request;
    rtu_full_i     : in  std_logic;
    rtu_rq_abort_o : out std_logic;
-    rtu_rq_valid_o : out std_logic
+    rtu_rq_valid_o : out std_logic;
+    rxbuf_full_i   : in  std_logic
    );

 end ep_rtu_header_extract;
@@ -84,7 +85,7 @@ begin  -- rtl
        else
          rmon_drp_at_rtu_full_o <='0';

-          if(snk_fab_i.sof = '1' and rtu_full_i = '0') then
+          if(snk_fab_i.sof = '1' and rtu_full_i = '0' and rxbuf_full_i = '0') then
            in_packet <= '1';
            in_header <= '1';
          elsif(snk_fab_i.sof = '1' and rtu_full_i = '1') then

--- a/modules/wr_endpoint/ep_rx_path.vhd
+++ b/modules/wr_endpoint/ep_rx_path.vhd
@@ -380,7 +380,8 @@ begin  -- behavioral
      rtu_rq_o         => rtu_rq_o,
      rtu_full_i       => rtu_full_i,
      rtu_rq_abort_o   => rtu_rq_abort_o,
-      rtu_rq_valid_o   => rtu_rq_valid);
+      rtu_rq_valid_o   => rtu_rq_valid,
+      rxbuf_full_i     => rxbuf_full);

  gen_with_rx_buffer : if g_with_rx_buffer generate
    U_Rx_Buffer : ep_rx_buffer