1 .. SPDX-License-Identifier: GPL-2.0
3 ===========================================================================
4 Driver for Synopsys DesignWare PCIe traffic generator (also known as xData)
5 ===========================================================================
8 Synopsys DesignWare PCIe prototype solution
14 Gustavo Pimentel <gustavo.pimentel@synopsys.com>
19 This driver should be used as a host-side (Root Complex) driver and Synopsys
20 DesignWare prototype that includes this IP.
22 The dw-xdata-pcie driver can be used to enable/disable PCIe traffic
23 generator in either direction (mutual exclusion) besides allowing the
24 PCIe link performance analysis.
26 The interaction with this driver is done through the module parameter and
27 can be changed in runtime. The driver outputs the requested command state
28 information to ``/var/log/kern.log`` or dmesg.
33 Write TLPs traffic generation - Root Complex to Endpoint direction
34 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
38 # echo 1 > /sys/class/misc/dw-xdata-pcie.0/write
40 Get link throughput in MB/s::
42 # cat /sys/class/misc/dw-xdata-pcie.0/write
45 Stop traffic in any direction::
47 # echo 0 > /sys/class/misc/dw-xdata-pcie.0/write
49 Read TLPs traffic generation - Endpoint to Root Complex direction
50 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
54 # echo 1 > /sys/class/misc/dw-xdata-pcie.0/read
56 Get link throughput in MB/s::
58 # cat /sys/class/misc/dw-xdata-pcie.0/read
61 Stop traffic in any direction::
63 # echo 0 > /sys/class/misc/dw-xdata-pcie.0/read