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pluto_hdl_adi/library/axi_dmac/axi_dmac_transfer.v

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axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
// ***************************************************************************
// ***************************************************************************
// Copyright 2014 - 2018 (c) Analog Devices, Inc. All rights reserved.
//
// In this HDL repository, there are many different and unique modules, consisting
// of various HDL (Verilog or VHDL) components. The individual modules are
// developed independently, and may be accompanied by separate and unique license
// terms.
//
// The user should read each of these license terms, and understand the
// freedoms and responsabilities that he or she has by using this source/core.
//
// This core is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE.
//
// Redistribution and use of source or resulting binaries, with or without modification
// of this file, are permitted under one of the following two license terms:
//
// 1. The GNU General Public License version 2 as published by the
// Free Software Foundation, which can be found in the top level directory
// of this repository (LICENSE_GPL2), and also online at:
// <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
//
// OR
//
// 2. An ADI specific BSD license, which can be found in the top level directory
// of this repository (LICENSE_ADIBSD), and also on-line at:
// https://github.com/analogdevicesinc/hdl/blob/master/LICENSE_ADIBSD
// This will allow to generate bit files and not release the source code,
// as long as it attaches to an ADI device.
//
// ***************************************************************************
// ***************************************************************************
Add missing timescale annotations For consistent simulation behavior it is recommended to annotate all source files with a timescale. Add it to those where it is currently missing. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2018-08-27 07:14:54 +00:00
`timescale 1ns/100ps
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
module axi_dmac_transfer #(
parameter DMA_DATA_WIDTH_SRC = 64,
parameter DMA_DATA_WIDTH_DEST = 64,
parameter DMA_LENGTH_WIDTH = 24,
axi_dmac: burst_memory: Consider DMA_LENGTH_ALIGN The DMA_LENGTH_ALIGN LSBs of all length For the most part the tools are able to deduce this using constant propagation. But this propagation does not work across the asynchronous meta data FIFO in the burst memory module. Add a DMA_LENGTH_ALIGN parameter to the burst_memory module which is used to explicitly keep the LSBs of length registers on the destination side fixed at 1'b1. This reduces resource use and improves timing by allowing better constant propagation and unused logic elimination. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2018-10-18 13:55:00 +00:00
parameter DMA_LENGTH_ALIGN = 3,
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
parameter BYTES_PER_BEAT_WIDTH_DEST = $clog2(DMA_DATA_WIDTH_DEST/8),
parameter BYTES_PER_BEAT_WIDTH_SRC = $clog2(DMA_DATA_WIDTH_SRC/8),
parameter DMA_TYPE_DEST = 0,
parameter DMA_TYPE_SRC = 2,
parameter DMA_AXI_ADDR_WIDTH = 32,
parameter DMA_2D_TRANSFER = 1,
parameter ASYNC_CLK_REQ_SRC = 1,
parameter ASYNC_CLK_SRC_DEST = 1,
parameter ASYNC_CLK_DEST_REQ = 1,
parameter AXI_SLICE_DEST = 0,
parameter AXI_SLICE_SRC = 0,
parameter MAX_BYTES_PER_BURST = 128,
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
parameter BYTES_PER_BURST_WIDTH = 7,
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
parameter FIFO_SIZE = 8,
parameter ID_WIDTH = $clog2(FIFO_SIZE*2),
parameter AXI_LENGTH_WIDTH_SRC = 8,
axi_dmac: diagnostic interface in bursts This change adds a diagnostic interface to the DMAC core. The interface exposes internal information about the core, information which can't be exposed through AXI registers due the latency and update rate. Such information is the fullness of the internal buffer. For this is exposed in bursts and is driven from the destination clock domain, as this is reflected in its name. The signal has a fixed size and is dimensioned by taking in account the supported maximum number of bursts of 128.
2018-06-07 13:20:27 +00:00
parameter AXI_LENGTH_WIDTH_DEST = 8,
axi_dmac: burst_memory: Add support for using asymmetric memory FPGAs support different widths for the read and write port of the block SRAM cells. The DMAC can make use of this feature when the source and destination interface have a different width to up-size/down-size the data bus. Using memory cells with asymmetric port width consumes the same amount of SRAM cells, but allows to bypass the re-size blocks inside the DMAC that are otherwise used for up- and down-sizing. This reduces overall resource usage and can improve timing. If the ratio between the destination and source port is too larger to be handled by SRAM alone the SRAM block will be configured to do partial up- or down-sizing and a resize block will be inserted to take care of the remaining up-/down-sizing. E.g. if a 256-bit interface is connected to a 32-bit interface the SRAM will be used to do an initial resizing of 256 bit to 64 bit and a resize block will be used to do the remaining resizing from 64 bit to 32 bit. Currently this feature is disabled for Intel FPGAs since Quartus does not properly infer a block RAM with different read and write port widths from the current ad_asym_mem module. Once that has been resolved support for asymmetric memories can also be enabled in the DMAC. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2018-06-08 09:43:43 +00:00
parameter ENABLE_DIAGNOSTICS_IF = 0,
parameter ALLOW_ASYM_MEM = 0
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
) (
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
input ctrl_clk,
input ctrl_resetn,
input ctrl_enable,
input ctrl_pause,
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
input req_valid,
output req_ready,
input [DMA_AXI_ADDR_WIDTH-1:BYTES_PER_BEAT_WIDTH_DEST] req_dest_address,
input [DMA_AXI_ADDR_WIDTH-1:BYTES_PER_BEAT_WIDTH_SRC] req_src_address,
input [DMA_LENGTH_WIDTH-1:0] req_x_length,
input [DMA_LENGTH_WIDTH-1:0] req_y_length,
input [DMA_LENGTH_WIDTH-1:0] req_dest_stride,
input [DMA_LENGTH_WIDTH-1:0] req_src_stride,
input req_sync_transfer_start,
input req_last,
output req_eot,
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
output [BYTES_PER_BURST_WIDTH-1:0] req_measured_burst_length,
output req_response_partial,
output req_response_valid,
input req_response_ready,
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
// Master AXI interface
input m_dest_axi_aclk,
input m_dest_axi_aresetn,
input m_src_axi_aclk,
input m_src_axi_aresetn,
// Write address
output [DMA_AXI_ADDR_WIDTH-1:0] m_axi_awaddr,
output [AXI_LENGTH_WIDTH_DEST-1:0] m_axi_awlen,
output [2:0] m_axi_awsize,
output [1:0] m_axi_awburst,
output [2:0] m_axi_awprot,
output [3:0] m_axi_awcache,
output m_axi_awvalid,
input m_axi_awready,
// Write data
output [DMA_DATA_WIDTH_DEST-1:0] m_axi_wdata,
output [(DMA_DATA_WIDTH_DEST/8)-1:0] m_axi_wstrb,
input m_axi_wready,
output m_axi_wvalid,
output m_axi_wlast,
// Write response
input m_axi_bvalid,
input [1:0] m_axi_bresp,
output m_axi_bready,
// Read address
input m_axi_arready,
output m_axi_arvalid,
output [DMA_AXI_ADDR_WIDTH-1:0] m_axi_araddr,
output [AXI_LENGTH_WIDTH_SRC-1:0] m_axi_arlen,
output [2:0] m_axi_arsize,
output [1:0] m_axi_arburst,
output [2:0] m_axi_arprot,
output [3:0] m_axi_arcache,
// Read data and response
input [DMA_DATA_WIDTH_SRC-1:0] m_axi_rdata,
axi_dmac: Hook up rlast for MM-AXI source interface For the memory-mapped AXI read interface the slave asserts rlast for the last beat in a burst. This means we don't have to count the number of beats to know when the burst is completed but instead can use rlast. This slightly reduces the amount of resources needed for the MM-AXI source module and given that the beat_counter is often the bottleneck timing wise this should also improve the timing. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-08 09:12:44 +00:00
input m_axi_rlast,
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
output m_axi_rready,
input m_axi_rvalid,
input [1:0] m_axi_rresp,
// Slave streaming AXI interface
input s_axis_aclk,
output s_axis_ready,
input s_axis_valid,
input [DMA_DATA_WIDTH_SRC-1:0] s_axis_data,
input [0:0] s_axis_user,
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
input s_axis_last,
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
output s_axis_xfer_req,
// Master streaming AXI interface
input m_axis_aclk,
input m_axis_ready,
output m_axis_valid,
output [DMA_DATA_WIDTH_DEST-1:0] m_axis_data,
output m_axis_last,
output m_axis_xfer_req,
// Input FIFO interface
input fifo_wr_clk,
input fifo_wr_en,
input [DMA_DATA_WIDTH_SRC-1:0] fifo_wr_din,
output fifo_wr_overflow,
input fifo_wr_sync,
output fifo_wr_xfer_req,
// Input FIFO interface
input fifo_rd_clk,
input fifo_rd_en,
output fifo_rd_valid,
output [DMA_DATA_WIDTH_DEST-1:0] fifo_rd_dout,
output fifo_rd_underflow,
output fifo_rd_xfer_req,
output [ID_WIDTH-1:0] dbg_dest_request_id,
output [ID_WIDTH-1:0] dbg_dest_address_id,
output [ID_WIDTH-1:0] dbg_dest_data_id,
output [ID_WIDTH-1:0] dbg_dest_response_id,
output [ID_WIDTH-1:0] dbg_src_request_id,
output [ID_WIDTH-1:0] dbg_src_address_id,
output [ID_WIDTH-1:0] dbg_src_data_id,
output [ID_WIDTH-1:0] dbg_src_response_id,
axi_dmac: diagnostic interface in bursts This change adds a diagnostic interface to the DMAC core. The interface exposes internal information about the core, information which can't be exposed through AXI registers due the latency and update rate. Such information is the fullness of the internal buffer. For this is exposed in bursts and is driven from the destination clock domain, as this is reflected in its name. The signal has a fixed size and is dimensioned by taking in account the supported maximum number of bursts of 128.
2018-06-07 13:20:27 +00:00
output [11:0] dbg_status,
// Diagnostics interface
output [7:0] dest_diag_level_bursts
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
);
wire dma_req_valid;
wire dma_req_ready;
wire [DMA_AXI_ADDR_WIDTH-1:BYTES_PER_BEAT_WIDTH_DEST] dma_req_dest_address;
wire [DMA_AXI_ADDR_WIDTH-1:BYTES_PER_BEAT_WIDTH_SRC] dma_req_src_address;
wire [DMA_LENGTH_WIDTH-1:0] dma_req_length;
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
wire [BYTES_PER_BURST_WIDTH-1:0] dma_req_measured_burst_length;
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
wire dma_req_eot;
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
wire dma_response_valid;
wire dma_response_ready;
wire dma_response_partial;
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
wire dma_req_sync_transfer_start;
wire dma_req_last;
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
wire req_clk = ctrl_clk;
wire req_resetn;
wire req_enable;
wire dest_clk;
wire dest_ext_resetn;
wire dest_resetn;
wire dest_enable;
wire dest_enabled;
wire src_clk;
wire src_ext_resetn;
wire src_resetn;
wire src_enable;
wire src_enabled;
wire req_valid_gated;
wire req_ready_gated;
axi_dmac: early abort 2d support
2018-08-30 13:29:24 +00:00
wire abort_req;
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
axi_dmac_reset_manager #(
.ASYNC_CLK_REQ_SRC (ASYNC_CLK_REQ_SRC),
.ASYNC_CLK_SRC_DEST (ASYNC_CLK_SRC_DEST),
.ASYNC_CLK_DEST_REQ (ASYNC_CLK_DEST_REQ)
) i_reset_manager (
.clk (ctrl_clk),
.resetn (ctrl_resetn),
.ctrl_enable (ctrl_enable),
.ctrl_pause (ctrl_pause),
.req_resetn (req_resetn),
.req_enable (req_enable),
.req_enabled (req_enable),
.dest_clk (dest_clk),
.dest_ext_resetn (dest_ext_resetn),
.dest_resetn (dest_resetn),
.dest_enable (dest_enable),
.dest_enabled (dest_enabled),
.src_clk (src_clk),
.src_ext_resetn (src_ext_resetn),
.src_resetn (src_resetn),
.src_enable (src_enable),
.src_enabled (src_enabled),
.dbg_status (dbg_status)
);
/*
* Things become a lot easier if we gate incoming requests in a central place
* before they are propagated downstream. Otherwise we'd need to take special
* care to not accidentally accept requests while the DMA is going through a
* shutdown and reset phase.
*/
assign req_valid_gated = req_enable & req_valid;
assign req_ready = req_enable & req_ready_gated;
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
generate if (DMA_2D_TRANSFER == 1) begin
dmac_2d_transfer #(
axi_dmac: fix 2d transfer address width The index on MSB of addresses was set to 31, but the width of address in the axi_dmac depends on a parameter. The mismatch causes issues in the Xilinx simulator which does not extends the narrower width signal with zeros, instead the wider signal gets 'Z' on its MSBs. When the address was incremented with the stride it became 'X' due the uninitialized MSBs.
2018-04-26 06:50:36 +00:00
.DMA_AXI_ADDR_WIDTH(DMA_AXI_ADDR_WIDTH),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.DMA_LENGTH_WIDTH (DMA_LENGTH_WIDTH),
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
.BYTES_PER_BURST_WIDTH (BYTES_PER_BURST_WIDTH),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.BYTES_PER_BEAT_WIDTH_DEST (BYTES_PER_BEAT_WIDTH_DEST),
.BYTES_PER_BEAT_WIDTH_SRC (BYTES_PER_BEAT_WIDTH_SRC)
) i_2d_transfer (
.req_aclk (req_clk),
.req_aresetn (req_resetn),
.req_eot (req_eot),
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
.req_measured_burst_length (req_measured_burst_length),
.req_response_partial (req_response_partial),
.req_response_valid (req_response_valid),
.req_response_ready (req_response_ready),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.req_valid (req_valid_gated),
.req_ready (req_ready_gated),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.req_dest_address (req_dest_address),
.req_src_address (req_src_address),
.req_x_length (req_x_length),
.req_y_length (req_y_length),
.req_dest_stride (req_dest_stride),
.req_src_stride (req_src_stride),
.req_sync_transfer_start (req_sync_transfer_start),
axi_dmac: TLAST support for 2d transfers In MM2S applications like video DMA it is useful to mark the end of the stream with the TLAST. The change enables the generation of the TLAST on the last beat of the last row of the 2d transfer.
2018-07-12 14:09:03 +00:00
.req_last (req_last),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
axi_dmac: early abort 2d support
2018-08-30 13:29:24 +00:00
.out_abort_req (abort_req),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.out_req_valid (dma_req_valid),
.out_req_ready (dma_req_ready),
.out_req_dest_address (dma_req_dest_address),
.out_req_src_address (dma_req_src_address),
.out_req_length (dma_req_length),
.out_req_sync_transfer_start (dma_req_sync_transfer_start),
axi_dmac: TLAST support for 2d transfers In MM2S applications like video DMA it is useful to mark the end of the stream with the TLAST. The change enables the generation of the TLAST on the last beat of the last row of the 2d transfer.
2018-07-12 14:09:03 +00:00
.out_req_last (dma_req_last),
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
.out_eot (dma_req_eot),
.out_measured_burst_length (dma_req_measured_burst_length),
.out_response_partial (dma_response_partial),
.out_response_valid (dma_response_valid),
.out_response_ready (dma_response_ready)
);
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
end else begin
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
/* Request */
assign dma_req_valid = req_valid_gated;
assign req_ready_gated = dma_req_ready;
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
assign dma_req_dest_address = req_dest_address;
assign dma_req_src_address = req_src_address;
assign dma_req_length = req_x_length;
assign dma_req_sync_transfer_start = req_sync_transfer_start;
assign dma_req_last = req_last;
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
/* Response */
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
assign req_eot = dma_req_eot;
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
assign req_measured_burst_length = dma_req_measured_burst_length;
assign req_response_partial = dma_response_partial;
assign req_response_valid = dma_response_valid;
assign dma_response_ready = req_response_ready;
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
end endgenerate
libraries: Correct module name according to the filename
2022-03-22 10:27:47 +00:00
request_arb #(
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.DMA_DATA_WIDTH_SRC (DMA_DATA_WIDTH_SRC),
.DMA_DATA_WIDTH_DEST (DMA_DATA_WIDTH_DEST),
.DMA_LENGTH_WIDTH (DMA_LENGTH_WIDTH),
axi_dmac: burst_memory: Consider DMA_LENGTH_ALIGN The DMA_LENGTH_ALIGN LSBs of all length For the most part the tools are able to deduce this using constant propagation. But this propagation does not work across the asynchronous meta data FIFO in the burst memory module. Add a DMA_LENGTH_ALIGN parameter to the burst_memory module which is used to explicitly keep the LSBs of length registers on the destination side fixed at 1'b1. This reduces resource use and improves timing by allowing better constant propagation and unused logic elimination. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2018-10-18 13:55:00 +00:00
.DMA_LENGTH_ALIGN (DMA_LENGTH_ALIGN),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.BYTES_PER_BEAT_WIDTH_DEST (BYTES_PER_BEAT_WIDTH_DEST),
.BYTES_PER_BEAT_WIDTH_SRC (BYTES_PER_BEAT_WIDTH_SRC),
.DMA_TYPE_DEST (DMA_TYPE_DEST),
.DMA_TYPE_SRC (DMA_TYPE_SRC),
.DMA_AXI_ADDR_WIDTH (DMA_AXI_ADDR_WIDTH),
.ASYNC_CLK_REQ_SRC (ASYNC_CLK_REQ_SRC),
.ASYNC_CLK_SRC_DEST (ASYNC_CLK_SRC_DEST),
.ASYNC_CLK_DEST_REQ (ASYNC_CLK_DEST_REQ),
.AXI_SLICE_DEST (AXI_SLICE_DEST),
.AXI_SLICE_SRC (AXI_SLICE_SRC),
.MAX_BYTES_PER_BURST (MAX_BYTES_PER_BURST),
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
.BYTES_PER_BURST_WIDTH (BYTES_PER_BURST_WIDTH),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.FIFO_SIZE (FIFO_SIZE),
.ID_WIDTH (ID_WIDTH),
.AXI_LENGTH_WIDTH_DEST (AXI_LENGTH_WIDTH_DEST),
axi_dmac: diagnostic interface in bursts This change adds a diagnostic interface to the DMAC core. The interface exposes internal information about the core, information which can't be exposed through AXI registers due the latency and update rate. Such information is the fullness of the internal buffer. For this is exposed in bursts and is driven from the destination clock domain, as this is reflected in its name. The signal has a fixed size and is dimensioned by taking in account the supported maximum number of bursts of 128.
2018-06-07 13:20:27 +00:00
.AXI_LENGTH_WIDTH_SRC (AXI_LENGTH_WIDTH_SRC),
axi_dmac: burst_memory: Add support for using asymmetric memory FPGAs support different widths for the read and write port of the block SRAM cells. The DMAC can make use of this feature when the source and destination interface have a different width to up-size/down-size the data bus. Using memory cells with asymmetric port width consumes the same amount of SRAM cells, but allows to bypass the re-size blocks inside the DMAC that are otherwise used for up- and down-sizing. This reduces overall resource usage and can improve timing. If the ratio between the destination and source port is too larger to be handled by SRAM alone the SRAM block will be configured to do partial up- or down-sizing and a resize block will be inserted to take care of the remaining up-/down-sizing. E.g. if a 256-bit interface is connected to a 32-bit interface the SRAM will be used to do an initial resizing of 256 bit to 64 bit and a resize block will be used to do the remaining resizing from 64 bit to 32 bit. Currently this feature is disabled for Intel FPGAs since Quartus does not properly infer a block RAM with different read and write port widths from the current ad_asym_mem module. Once that has been resolved support for asymmetric memories can also be enabled in the DMAC. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2018-06-08 09:43:43 +00:00
.ENABLE_DIAGNOSTICS_IF(ENABLE_DIAGNOSTICS_IF),
.ALLOW_ASYM_MEM (ALLOW_ASYM_MEM)
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
) i_request_arb (
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.req_clk (req_clk),
.req_resetn (req_resetn),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.req_valid (dma_req_valid),
.req_ready (dma_req_ready),
.req_dest_address (dma_req_dest_address),
.req_src_address (dma_req_src_address),
.req_length (dma_req_length),
.req_xlast (dma_req_last),
.req_sync_transfer_start (dma_req_sync_transfer_start),
.eot (dma_req_eot),
axi_dmac: preparation work for reporting length of partial transfers Length of partial transfers are stored in a queue for SW reads. The presence of partial transfer is indicated by a status bit. The reporting can be enabled by a control bit. The progress of any transfer can be followed by a debug register.
2018-08-10 14:47:21 +00:00
.measured_burst_length(dma_req_measured_burst_length),
.response_partial (dma_response_partial),
.response_valid (dma_response_valid),
.response_ready (dma_response_ready),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
axi_dmac: early abort 2d support
2018-08-30 13:29:24 +00:00
.abort_req (abort_req),
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.req_enable (req_enable),
.dest_clk (dest_clk),
.dest_ext_resetn (dest_ext_resetn),
.dest_resetn (dest_resetn),
.dest_enable (dest_enable),
.dest_enabled (dest_enabled),
.src_clk (src_clk),
.src_ext_resetn (src_ext_resetn),
.src_resetn (src_resetn),
.src_enable (src_enable),
.src_enabled (src_enabled),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.m_dest_axi_aclk (m_dest_axi_aclk),
.m_dest_axi_aresetn (m_dest_axi_aresetn),
.m_src_axi_aclk (m_src_axi_aclk),
.m_src_axi_aresetn (m_src_axi_aresetn),
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.m_axi_awvalid (m_axi_awvalid),
.m_axi_awready (m_axi_awready),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.m_axi_awaddr (m_axi_awaddr),
.m_axi_awlen (m_axi_awlen),
.m_axi_awsize (m_axi_awsize),
.m_axi_awburst (m_axi_awburst),
.m_axi_awprot (m_axi_awprot),
.m_axi_awcache (m_axi_awcache),
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.m_axi_wvalid (m_axi_wvalid),
.m_axi_wready (m_axi_wready),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.m_axi_wdata (m_axi_wdata),
.m_axi_wstrb (m_axi_wstrb),
.m_axi_wlast (m_axi_wlast),
.m_axi_bvalid (m_axi_bvalid),
.m_axi_bready (m_axi_bready),
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.m_axi_bresp (m_axi_bresp),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.m_axi_arvalid (m_axi_arvalid),
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.m_axi_arready (m_axi_arready),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.m_axi_araddr (m_axi_araddr),
.m_axi_arlen (m_axi_arlen),
.m_axi_arsize (m_axi_arsize),
.m_axi_arburst (m_axi_arburst),
.m_axi_arprot (m_axi_arprot),
.m_axi_arcache (m_axi_arcache),
.m_axi_rready (m_axi_rready),
.m_axi_rvalid (m_axi_rvalid),
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.m_axi_rdata (m_axi_rdata),
axi_dmac: Hook up rlast for MM-AXI source interface For the memory-mapped AXI read interface the slave asserts rlast for the last beat in a burst. This means we don't have to count the number of beats to know when the burst is completed but instead can use rlast. This slightly reduces the amount of resources needed for the MM-AXI source module and given that the beat_counter is often the bottleneck timing wise this should also improve the timing. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-08 09:12:44 +00:00
.m_axi_rlast (m_axi_rlast),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.m_axi_rresp (m_axi_rresp),
.s_axis_aclk (s_axis_aclk),
.s_axis_ready (s_axis_ready),
.s_axis_valid (s_axis_valid),
.s_axis_data (s_axis_data),
.s_axis_user (s_axis_user),
axi_dmac: Rework transfer shutdown The DMAC allows a transfer to be aborted. When a transfer is aborted the DMAC shuts down as fast as possible while still completing any pending transactions as required by the protocol specifications of the port. E.g. for AXI-MM this means to complete all outstanding bursts. Once the DMAC has entered an idle state a special synchronization signal is send to all modules. This synchronization signal instructs them to flush the pipeline and remove any stale data and metadata associated with the aborted transfer. Once all data has been flushed the DMAC enters the shutdown state and is ready for the next transfer. In addition each module has a reset that resets the modules state and is used at system startup to bring them into a consistent state. Re-work the shutdown process to instead of flushing the pipeline re-use the startup reset signal also for shutdown. To manage the reset signal generation introduce the reset manager module. It contains a state machine that will assert the reset signals in the correct order and for the appropriate duration in case of a transfer shutdown. The reset signal is asserted in all domains until it has been asserted for at least 4 clock cycles in the slowest domain. This ensures that the reset signal is not de-asserted in the faster domains before the slower domains have had a chance to process the reset signal. In addition the reset signal is de-asserted in the opposite direction of the data flow. This ensures that the data sink is ready to receive data before the data source can start sending data. This simplifies the internal handshaking. This approach has multiple advantages. * Issuing a reset and removing all state takes less time than explicitly flushing one sample per clock cycle at a time. * It simplifies the logic in the faster clock domains at the expense of more complicated logic in the slower control clock domain. This allows for higher fMax on the data paths. * Less signals to synchronize from the control domain to the data domains The implementation of the pause mode has also slightly changed. Pause is now a simple disable of the data domains. When the transfer is resumed after a pause the data domains are re-enabled and continue at their previous state. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-09-21 14:02:44 +00:00
.s_axis_last (s_axis_last),
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
.s_axis_xfer_req (s_axis_xfer_req),
.m_axis_aclk (m_axis_aclk),
.m_axis_ready (m_axis_ready),
.m_axis_valid (m_axis_valid),
.m_axis_data (m_axis_data),
.m_axis_last (m_axis_last),
.m_axis_xfer_req (m_axis_xfer_req),
.fifo_wr_clk (fifo_wr_clk),
.fifo_wr_en (fifo_wr_en),
.fifo_wr_din (fifo_wr_din),
.fifo_wr_overflow (fifo_wr_overflow),
.fifo_wr_sync (fifo_wr_sync),
.fifo_wr_xfer_req (fifo_wr_xfer_req),
.fifo_rd_clk (fifo_rd_clk),
.fifo_rd_en (fifo_rd_en),
.fifo_rd_valid (fifo_rd_valid),
.fifo_rd_dout (fifo_rd_dout),
.fifo_rd_underflow (fifo_rd_underflow),
.fifo_rd_xfer_req (fifo_rd_xfer_req),
.dbg_dest_request_id (dbg_dest_request_id),
.dbg_dest_address_id (dbg_dest_address_id),
.dbg_dest_data_id (dbg_dest_data_id),
.dbg_dest_response_id (dbg_dest_response_id),
.dbg_src_request_id (dbg_src_request_id),
.dbg_src_address_id (dbg_src_address_id),
.dbg_src_data_id (dbg_src_data_id),
axi_dmac: diagnostic interface in bursts This change adds a diagnostic interface to the DMAC core. The interface exposes internal information about the core, information which can't be exposed through AXI registers due the latency and update rate. Such information is the fullness of the internal buffer. For this is exposed in bursts and is driven from the destination clock domain, as this is reflected in its name. The signal has a fixed size and is dimensioned by taking in account the supported maximum number of bursts of 128.
2018-06-07 13:20:27 +00:00
.dbg_src_response_id (dbg_src_response_id),
.dest_diag_level_bursts(dest_diag_level_bursts)
axi_dmac: Split transfer handling into separate sub-module Move the transfer logic, including the 2d module, into its own sub-module. This allows testing of the full transfer logic independently of the register map logic. The top-level module now only instantiates the register map and transfer module, but does not have any logic on its own. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-08-05 05:57:38 +00:00
);
endmodule