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Add Documentation for dw-xdata-pcie driver. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Link: https://lore.kernel.org/r/764b9bf744d7fe20c7a216019eef8ddf482c1bd7.1617016509.git.gustavo.pimentel@synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
41 lines
1.3 KiB
ReStructuredText
41 lines
1.3 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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===========================================================================
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Driver for Synopsys DesignWare PCIe traffic generator (also known as xData)
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===========================================================================
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This driver should be used as a host-side (Root Complex) driver and Synopsys
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DesignWare prototype that includes this IP.
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The "dw-xdata-pcie" driver can be used to enable/disable PCIe traffic
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generator in either direction (mutual exclusion) besides allowing the
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PCIe link performance analysis.
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The interaction with this driver is done through the module parameter and
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can be changed in runtime. The driver outputs the requested command state
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information to /var/log/kern.log or dmesg.
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Request write TLPs traffic generation - Root Complex to Endpoint direction
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- Command:
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echo 1 > /sys/class/misc/dw-xdata-pcie/write
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Get write TLPs traffic link throughput in MB/s
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- Command:
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cat /sys/class/misc/dw-xdata-pcie/write
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- Output example:
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204
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Request read TLPs traffic generation - Endpoint to Root Complex direction:
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- Command:
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echo 1 > /sys/class/misc/dw-xdata-pcie/read
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Get read TLPs traffic link throughput in MB/s
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- Command:
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cat /sys/class/misc/dw-xdata-pcie/read
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- Output example:
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199
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Request to stop any current TLP transfer:
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- Command:
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echo 1 > /sys/class/misc/dw-xdata-pcie/stop
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