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Improve completion credit count tracking

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich 2023-06-22 16:45:00 -07:00
parent e59f5a03bd
commit 0a53e7c990
1 changed files with 14 additions and 8 deletions
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22
rtl/dma_if_pcie_rd.v
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@ -422,13 +422,13 @@ reg [OP_TAG_WIDTH+1-1:0] active_op_count_reg = 0;
reg inc_active_op;
reg dec_active_op;
reg [CL_CPLH_FC_LIMIT+1-1:0] active_cplh_fc_count_reg = 0;
reg active_cplh_fc_av_reg = 1'b1;
reg [CL_CPLH_FC_LIMIT+1-1:0] active_cplh_fc_count_reg = 0, active_cplh_fc_count_next;
reg active_cplh_fc_av_reg = 1'b1, active_cplh_fc_av_next;
reg [6:0] inc_active_cplh_fc_count;
reg [6:0] dec_active_cplh_fc_count;
reg [CL_CPLD_FC_LIMIT+1-1:0] active_cpld_fc_count_reg = 0;
reg active_cpld_fc_av_reg = 1'b1;
reg [CL_CPLD_FC_LIMIT+1-1:0] active_cpld_fc_count_reg = 0, active_cpld_fc_count_next;
reg active_cpld_fc_av_reg = 1'b1, active_cpld_fc_av_next;
reg [8:0] inc_active_cpld_fc_count;
reg [8:0] dec_active_cpld_fc_count;
@ -1382,6 +1382,12 @@ always @* begin
end
active_tx_count_av_next = active_tx_count_next < TX_LIMIT;
active_cplh_fc_count_next <= active_cplh_fc_count_reg + inc_active_cplh_fc_count - dec_active_cplh_fc_count;
active_cplh_fc_av_next <= !CPLH_FC_LIMIT || active_cplh_fc_count_next < CPLH_FC_LIMIT;
active_cpld_fc_count_next <= active_cpld_fc_count_reg + inc_active_cpld_fc_count - dec_active_cpld_fc_count;
active_cpld_fc_av_next <= !CPLD_FC_LIMIT || active_cpld_fc_count_next < CPLD_FC_LIMIT;
end
always @(posedge clk) begin
@ -1501,11 +1507,11 @@ always @(posedge clk) begin
active_tag_count_reg <= active_tag_count_reg + inc_active_tag - dec_active_tag;
active_op_count_reg <= active_op_count_reg + inc_active_op - dec_active_op;
active_cplh_fc_count_reg <= active_cplh_fc_count_reg + inc_active_cplh_fc_count - dec_active_cplh_fc_count;
active_cplh_fc_av_reg <= !CPLH_FC_LIMIT || active_cplh_fc_count_reg < CPLH_FC_LIMIT;
active_cplh_fc_count_reg <= active_cplh_fc_count_next;
active_cplh_fc_av_reg <= active_cplh_fc_av_next;
active_cpld_fc_count_reg <= active_cpld_fc_count_reg + inc_active_cpld_fc_count - dec_active_cpld_fc_count;
active_cpld_fc_av_reg <= !CPLD_FC_LIMIT || active_cpld_fc_count_reg < CPLD_FC_LIMIT;
active_cpld_fc_count_reg <= active_cpld_fc_count_next;
active_cpld_fc_av_reg <= active_cpld_fc_av_next;
pcie_tag_table_start_ptr_reg <= pcie_tag_table_start_ptr_next;
pcie_tag_table_start_ram_sel_reg <= pcie_tag_table_start_ram_sel_next;