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[/] [fade_ether_protocol/] - Rev 37

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37 Added new design for AFCK board, which uses 8 10 Gbps links.
Additionally added I2C control of the AFCK Si57x based clock.
The I2C controller is driven via VIO blocks controlled by JTAG
interface from Vivado Tcl console.
Tcl scripts are in the fpga/src/AFCK/i2c_tools directory.
To configure clock to 156.25MHz, and to route it to links,
change directory to fpga/src/AFCK/i2c_tools and do
"source start_10g_links.tcl".
After the clock is reprogrammed, reconfigure the FPGA again
(it seems, that there is a problem with reseting links after
clock is reconfigured).
wzab 3285d 08h /fade_ether_protocol/
36 Added signals needed to ensure, that Si570/1 chip generates the clock.
Added signals driving the rate select lines in the SFP+ modules high.
Added two XDC files - the first one for FM-S14 in the FMC1
connector, the second one for FM-S14 in the FMC2 connector.
wzab 3301d 11h /fade_ether_protocol/
35 Changed comment in definition of the descriptor record
Updated IP cores in project for KC705 (to Vivado 2014.4)
wzab 3404d 10h /fade_ether_protocol/
34 The "old stable" version moved to separate directory. wzab 3418d 15h /fade_ether_protocol/
33 Added script for automatic compilation of FADE for AFCK, using Vivado 2014.4 wzab 3420d 20h /fade_ether_protocol/
32 Added the 4-channel FADE test implementation for the AFCK board. wzab 3421d 00h /fade_ether_protocol/
31 Added receiver2t_cmd to the Makefile wzab 3425d 14h /fade_ether_protocol/
30 Corrected error which slows down handling of user commands (the thread
executing the user command used wait_event_timeout instead of
wait_event_timeout_interruptiple).

Added demo program which tests time of execution of the user's
command.
wzab 3425d 14h /fade_ether_protocol/
29 Fixed two mistakes in mutex management (mutex not unlocked, when function leaved after an error)
Fixed dead URL in comments.
wzab 3430d 15h /fade_ether_protocol/
28 Correction of an obvious mistake in the Linux driver, which lead to deadlock
when two applications (or two threads) tried to open the same FADE device.
wzab 3434d 13h /fade_ether_protocol/
27 Added file fade_one_channel, allowing to implement multiple FADE instances in a single FPGA. wzab 3448d 22h /fade_ether_protocol/
26 Corrected small bug in CRC update in eth_sender8,vhd
Added counter of retransmitted packets.
Some minor changes in delay update parameters.
wzab 3483d 09h /fade_ether_protocol/
25 Modified the Tcl script for KC705 so, that it automatically runs synthesis, implementation and generates bitstream. wzab 3506d 23h /fade_ether_protocol/
24 Added build scripts for KC705 (somehow they got omitted in version 22) wzab 3507d 12h /fade_ether_protocol/
23 Added script allowing for batch compilation of FADE 10G for Atlys.
Just run build_proj_atlys.sh

Removed compilation of receiver2.c (which has been deleted) in the Makefile.
Slightly changed order of operation in the receiver2t.c
wzab 3507d 12h /fade_ether_protocol/
22 Sources reorganized so, that each ".xci" is in a separate directory.
Added script for rebuilding of Vivado project for KC705.
Just run the build_proj_kc705 script, and the project
will be created as kc705_10g3.xpr in the kc705_10g3 drirectory.
You can open it later on in Vivado 2014.3 and build the bitstream.
wzab 3507d 13h /fade_ether_protocol/
21 Changed the top entity for KC705, so that the FADE core is correctly reset
by the RESETMAC command.
Changed sending of the FCMD_RESET command form driver to the FPGA (as it
is not confirmed - the reinitialized core can't confirm the command).
Changed the receiver2t demo program so that it sends RESETMAC three times
before the transmission is started.

In the future, probably there should be a STATUS ioctl, which would
verify, that the core has been reset by RESETMAC.
Then the program should send RESETMAC, and afterwards read the STATUS,
verifying, that RESETMAC arrived FPGA. If not it should repeat the
above procedure (not implemented yet).
wzab 3507d 19h /fade_ether_protocol/
20 Cured problem with dta_eod missed, when buffer was full at the moment
when dta_eod was asserted.
It caused the client program to hang, as no end of data was transmitted
and no new data arrived...
wzab 3508d 11h /fade_ether_protocol/
19 The send_cmd function protected to attempt to call it if the Ethernet device was not
claimed before (previously it caused a problem with NULL pointer dereference
in the ioctl in kernel code).

Moved the Ethernet device name to a macro, so it is easier to modify it, when
someone tests in different machines (e.g. the 10Gb/s NIC for tests with
KC705 is p4p1, while 1Gb/s NIC for tests with Atlys is eth0)
wzab 3508d 13h /fade_ether_protocol/
18 Changed handling of commands so, that all commands are now confirmed - even start and stop
(which previously were not confirmed - successful reception of start was confirmed
by sending of data packets (what if there was no data at the moment?), successful
reception of stop was confirmed by end of data stream).
Added also flushing of data stream after reception of stop command.
The receiver2t.c implements suggested method of communication with the FADE driver.
One thread is responsible for reception and processing of data, while another thread
is responsible for sending of control commands.
wzab 3509d 08h /fade_ether_protocol/
17 Corrected mutex management in ioctl. wzab 3515d 13h /fade_ether_protocol/
16 Introduced inline functions simplifying reading and writing of packets' contents. wzab 3515d 14h /fade_ether_protocol/
15 The previous experimental implemenation for 10Gb/s links has been replaced with the
new, rewritten implementation, which uses sequential numbering of packets instaed
of "sets of packets". This allowed to simplify the driver, and improve its performance.
Additionally a possibility to send user defined commands to the FPGA was added.
wzab 3523d 11h /fade_ether_protocol/
14 Removed small mistake causing a combinatorial loop. wzab 3528d 13h /fade_ether_protocol/
13 Small correction in the kernel driver wzab 3530d 18h /fade_ether_protocol/
12 Added experimental version of my protocol, working with the 10Gb/s
link on the KC705 board.
The design has been initially tested, and is working, but it still
needs some improvments.
Please note, that this version uses the "jumbo" frames,
with 8192 bytes of user data in each packet (plus header).
Therefore it was necessary to make some changes in the kernel
driver.
wzab 3537d 14h /fade_ether_protocol/
11 Corrected small bug in eth_sender8 (which in fact should only
generate a compiler warning, as the resulting bit vector
was anyway correctly truncated...)
wzab 3694d 13h /fade_ether_protocol/
10 Updated test client program - receiver2.c

Added possibility to activate only selected slave in the command line.
Currently program services up to three slaves: 0, 1 and 2
To activate a slave, add its number as a program argument in the command line
(order doesn't matter).
wzab 3994d 11h /fade_ether_protocol/
9 Corrected serious bug in acknowledged packed number calculations, which lead to transmission
errors in high speed CPUs.
wzab 3995d 11h /fade_ether_protocol/
8 Adjusted parameters of the NCA (network congestion avoidance) alogorithm
to obtain higher throughput.
wzab 3999d 12h /fade_ether_protocol/

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