23188e0d45
Removes old information related to the stop file interface in sysfs left by mistake during patch revision. Improves the document text format to be more user-friendly and adds basic driver related information, such as support, datasheet, and author. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Link: https://lore.kernel.org/r/4e72f931474a784d478e5a67961ecf116911997a.1618066164.git.gustavo.pimentel@synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
65 lines
1.6 KiB
ReStructuredText
65 lines
1.6 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
|
|
|
|
===========================================================================
|
|
Driver for Synopsys DesignWare PCIe traffic generator (also known as xData)
|
|
===========================================================================
|
|
|
|
Supported chips:
|
|
Synopsys DesignWare PCIe prototype solution
|
|
|
|
Datasheet:
|
|
Not freely available
|
|
|
|
Author:
|
|
Gustavo Pimentel <gustavo.pimentel@synopsys.com>
|
|
|
|
Description
|
|
-----------
|
|
|
|
This driver should be used as a host-side (Root Complex) driver and Synopsys
|
|
DesignWare prototype that includes this IP.
|
|
|
|
The dw-xdata-pcie driver can be used to enable/disable PCIe traffic
|
|
generator in either direction (mutual exclusion) besides allowing the
|
|
PCIe link performance analysis.
|
|
|
|
The interaction with this driver is done through the module parameter and
|
|
can be changed in runtime. The driver outputs the requested command state
|
|
information to ``/var/log/kern.log`` or dmesg.
|
|
|
|
Example
|
|
-------
|
|
|
|
Write TLPs traffic generation - Root Complex to Endpoint direction
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Generate traffic::
|
|
|
|
# echo 1 > /sys/class/misc/dw-xdata-pcie.0/write
|
|
|
|
Get link throughput in MB/s::
|
|
|
|
# cat /sys/class/misc/dw-xdata-pcie.0/write
|
|
204
|
|
|
|
Stop traffic in any direction::
|
|
|
|
# echo 0 > /sys/class/misc/dw-xdata-pcie.0/write
|
|
|
|
Read TLPs traffic generation - Endpoint to Root Complex direction
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Generate traffic::
|
|
|
|
# echo 1 > /sys/class/misc/dw-xdata-pcie.0/read
|
|
|
|
Get link throughput in MB/s::
|
|
|
|
# cat /sys/class/misc/dw-xdata-pcie.0/read
|
|
199
|
|
|
|
Stop traffic in any direction::
|
|
|
|
# echo 0 > /sys/class/misc/dw-xdata-pcie.0/read
|
|
|