| Commit message (Collapse) | Author | Age | Files | Lines |
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Signed-off-by: Virendra Kakade <virendra.kakade@ni.com>
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We have noticed that on 1 GbE connections, MTU discovery can become
unreliable. Since we now use the MTU directly for deriving spp and other
values, a correct MTU is important.
Because we don't have a way of knowing if MTU discovery worked or not,
we add some heuristics in form of a plausibility check. For now, the
only rule in this check is if that the detected MTU is a bit larger than
1472 bytes, we coerce down to 1472, because this is such a standard
value (most 1 GbE interfaces default to an IPv4 MTU of 1500 bytes).
For the cases where the interface MTU is set to be between 1500 and 1528
bytes, this would cause a very minor performance loss. We accept this
performance loss as it is small, and those cases are very rare. MTUs are
usually 1500 bytes, or >= 8000 bytes for high-speed links using jumbo
frames.
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This constant was generally harmful, since it was only correct under
certain circumstances (64 bit CHDR with timestamps). The X3x0 code was
the last place it was being used, and we remove it without substitute
because it was not doing anything useful here.
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These two values where being mixed up in the code. To summarize:
- The MTU is the max CHDR packet size, including header & timestamp.
- The max payload is the total number of bytes regular payload plus
metadata that can be fit into into a CHDR packet. It is strictly
smaller than the MTU. For example, for 64-bit CHDR widths, if
a timestamp is desired, the max payload is 16 bytes smaller than
the MTU.
The other issue was that we were using a magic constant (DEFAULT_SPP)
which was causing conflicts with MTUs and max payloads.
This constant was harmful in multiple ways:
- The explanatory comment was incorrect (it stated it would cap packets
to 1500 bytes, which it didn't)
- It imposed random, hardcoded values that interfered with an 'spp
discovery', i.e., the ability to derive a good spp value from MTUs
- The current value capped packet sizes to 8000 bytes CHDR packets, even
when we wanted to use bigger ones
This patch changes the following:
- noc_block_base now has improved docs for MTU, and additional APIs
(get_max_payload_size(), get_chdr_hdr_len()) which return the
current payload size given MTU and CHDR width, and the CHDR header
length.
- The internally used graph nodes for TX and RX streamers also get
equipped with the same new two API calls.
- The radio, siggen, and replay block all where doing different
calculations for their spp/ipp values. Now, they all use the max
payload value to calculate spp/ipp. Unit tests where adapted
accordingly. Usage of DEFAULT_SPP was removed.
- The replay block used a hardcoded 16 bytes for header lengths, which
was replaced by get_chdr_hdr_len()
- The TX and RX streamers where discarding the MTU value and using the
max payload size as the MTU, which then propagated throughout the
graph. Now, both values are stored and can be used where appropriate.
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The replay block is more like the radio block than like a FIFO. In
particular, consider this flow graph:
Replay -> DDC -> Replay
Imagine you're using the replay block to test the DDC block with
prerecorded data. If we treated the Replay Block like a FIFO, then we'd
have a loop in the graph (which is already wrong). If we used the DDC to
resample, then the input- and output sample rate of the Replay mismatch,
which is a legal way to use the Replay block, but not possible if we
treat the graph like a loop.
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This example had some major issues since UHD 4, which are now fixed.
Mainly, the option to include a custom RFNoC block was not working.
The example was rehauled severely:
- Custom blocks are now usable again.
- UHD/RFNoC code is used for the connections, rather than a custom
kludge.
- Sample rate is set via property propagation
- boost::format() was not helpful in this example, and was removed.
- A list of active connections is now printed
- The --block-args argument is dropped in favour of --block-props. The
former never did anything useful, and "block args" are a UHD 3 thing.
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This adds some more explanatory comments around active and static
connections.
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When connect_through_blocks() was called on blocks within a single
chain, there was a bug where the chain was incorrectly cropped. In
a standard FPGA image, say one was to use this API call to connect the
radio to the DDC. It would generate a chain of blocks hanging off the
radio as such:
Radio -> DDC -> SEP
What the code should do, and what this fix provides, is that the chain
gets cropped after the DDC, to look like this:
Radio -> DDC
With the current bug, it would assume the chain has a dangling edge, and
incorrectly throw an exception.
Note that this bug would not appear when source and destination block
are on separate chains (i.e., both have an SEP in their chain).
This patch includes minor logging and comment improvements around the
offending lines of code.
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This commit enables a special personality on the X410 motherboard CPLD required
for NI manufacturing purposes only.
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This commit refactors the X410's CPLDs build process to make it similar to other
FPGA targets within the repo. The new process relies on basic Quartus build
utilities.
Additionally, this commit adds support for an alternative MAX10 CPLD for the
motherboard CPLD implementation. Both previous (10M04) and new variant
(10M08) are supported concurrently. The images package mapping is updated to
reflect these changes.
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This script is intended to be run before streaming.
- Manages network interfaces, memory buffers, and other
aspects of the system configuration to give the host machine
ideal performance during streaming.
- Installs/updates dpdk/util dependencies for the script
- Generates and writes uhd config files for dpdk
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The async message handler and the async message validator would
erroneously compare channel numbers for RX async messages with the
number of valid TX channels. On TwinRX, where there are zero TX
channels, this would always fail. Elsewhere in the code, the comparisons
for TX and RX channels mixed up input and output ports.
The second issue is that the comparison made was a "greater than" rather
than "greater or equal".
The effect of these two bugs was that potentially, we could have
accepted async messages for an invalid port N, where N is the number of
valid ports of this block, and that for TwinRX/X300 users, async
messages on channel 1 would not get accepted (they would, however, get
accepted for channel 0 because of the second issue). This includes
overrun handling, which was broken for channel 1 and 3 on an X300.
Another effect of the bug was that EPIDs for async messages weren't
always programmed correctly.
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Getting the time from the mb_controller is slow, so try to get the time
from the Radio on the fast path first.
Signed-off-by: michael-west <michael.west@ettus.com>
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Add API calls to Radio control to get ticks and time.
Signed-off-by: michael-west <michael.west@ettus.com>
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Added registers to read back radio time. Bumped minor compat.
Signed-off-by: michael-west <michael.west@ettus.com>
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- Remove documentation of skip_dram, skip_ddc, skip_duc, which are all
obsolete since UHD 4
- Properly document serialize_init
- Add a table of valid args for X310 as with other devices
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The order must:
- Check transaction has the right number of hops, then read hop
- Check hop has the right number of operations (at least 2), then read
those ops
- Check the ops have the correct opcodes
The code was doing checks in the wrong order. Thanks to Github user
johnwstanford for pointing this out.
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This provides every block controller with a copy of its CHDR width.
Note: mock blocks always get configured with a 64-bit CHDR width, to
retain API compatibility.
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This allows consumers of UHD compiling with C++11 to include this file
(which is now included via noc_block_base) by turning a switch statement
into a functionally equivalent (albeit less readable) nested ternary
statement.
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Thanks to Github user johnwstanford for pointing this out.
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The recent removal of cruft in 78336d4 caused an implicit include to be
missing from this dissector, causing it to no longer compile. The
include is added to the dissector explicitly now.
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The times on the device can glitch if either the tick rate changes or
the number of active chains changes. This throws off the time if the
user gets streamers, changes the sample rate, or changes the tick rate
after synchronizing the time. This change re-synchronizes the times
automatically in those cases.
Signed-off-by: michael-west <michael.west@ettus.com>
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This gets closer to what our hardware can actually support. See the
comments for further explanations.
This has the side-effect of patching an issue on X410 (using 200 MHz
images) where garbage samples would get injected (one per packet). It
is not, however, the final fix for that problem.
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This lets Doxygen create a page in the UHD manual that lists all RFNoC
block controllers. It will be accessible under Manual -> Modules ->
RFNoC -> RFNoC Blocks shipped with UHD.
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The external power can, broadly speaking, be in one of three possible
states:
- OFF (the default)
- ON (the user has enabled external power, and it's working normally)
- FAULT (the external power has encountered a fault condition)
This commit allows the client of MPM to distinguish between these
three conditions.
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Add missing chdr_mgmt_*() and enum_to_chdr_w() functions.
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These methods allow for reconfiguration of GPIO masters for x4xx.
The method names are get_gpio_banks, get_gpio_srcs, get_gpio_src,
and set_gpio_src.
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"bank" refers to what the radio control sees, and "port" refers to what
the user looking at the physical device sees. For example, on X410 each
radio control only has a single (24-bit) output, which can be routed
to either of two ports.
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This implements the GPIO API for X410 through get_gpio_attr and
set_gpio_attr. In ATR mode, which channel's ATR state is chosen by the
set_gpio_src call, setting e.g. DB0_RF0 for channel 0 or DB0_RF1 for
channel 1. In manual mode, all 24 bits (for both ports) are set in
a single register write.
Although the front panel of the device has two ports, labelled GPIO0 and
GPIO1, this API exposes them as though they were a single 24-bit GPIO
port.
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This removes some constants from UHD that were left over from RFNoC/UHD
3.x. They are unused.
rfnoc_rx_to_file had a commented-out section that was also UHD-3 only.
Note that rfnoc/constants.hpp is pretty bare now, and could be removed.
However, it is in the public header section, so we shall leave the used
constants where they are.
This requires fixing includes in mgmt_portal.cpp.
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