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ganimede-multipacket #19

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Adam merged 13 commits from ganimede-multipacket into ganimede-rework 2025-05-27 15:18:08 +02:00
Conversation 0 Commits 13 Files Changed 7 +12 -3
1 changed files with 12 additions and 3 deletions
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15
src/socbridge/socbridge_driver.vhd
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@ -13,7 +13,8 @@ use grlib.stdlib.all;
entity socbridge_driver is
generic(
MAX_PKT_SIZE : integer range 1 to 128 := 8
MAX_PKT_SIZE : integer range 1 to 128 := 16;
BUFFER_SIZE : integer
);
port(
clk : in std_logic;
@ -341,7 +342,7 @@ begin
elsif st.curr_rx_transaction = READ or st.curr_rx_transaction = READ_ADD
or st.curr_rx_transaction = WRITE or st.curr_rx_transaction = WRITE_ADD then
trans_read_next_state <= IDLE;
elsif trans_st.read.curr_inst.request = '1' then
elsif trans_st.read.curr_inst.request = '1' and BUFFER_SIZE - ip_to_socbridge_driver.read_fifo.used_slots > 2*MAX_PKT_SIZE then
trans_read_next_state <= SEND;
else
trans_read_next_state <= IDLE;
@ -362,7 +363,7 @@ begin
trans_read_next_state <= IDLE;
elsif ip_to_socbridge_driver.flush = '1'and not st.read_in_flight then
trans_read_next_state <= IDLE;
elsif not st.read_in_flight then
elsif not st.read_in_flight and BUFFER_SIZE - ip_to_socbridge_driver.read_fifo.used_slots > 2*MAX_PKT_SIZE then
trans_read_next_state <= SEND;
else
trans_read_next_state <= AWAIT;
@ -616,6 +617,14 @@ begin
end if;
trans_st.write.is_first_word <= '1';
when SEND =>
if trans_st.write.curr_inst.seq_mem_access_count mod 256 = 0 then
trans_st.write.is_first_word <= '1';
elsif st.last_sent_transaction = READ or st.last_sent_transaction = READ_ADD
or next_tx_transaction = READ or next_tx_transaction = READ_ADD then
trans_st.write.is_first_word <= '1';
else
trans_st.write.is_first_word <= '0';
end if;
when SEND_ACCEPTED =>
trans_st.write.curr_inst.seq_mem_access_count <= trans_st.write.curr_inst.seq_mem_access_count - MAX_PKT_SIZE;
trans_st.write.curr_inst.address <= std_logic_vector(unsigned(trans_st.write.curr_inst.address) + MAX_PKT_SIZE);