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64 lines
1.6 KiB
64 lines
1.6 KiB
.. 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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Supported chips: |
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Synopsys DesignWare PCIe prototype solution |
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Datasheet: |
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Not freely available |
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Author: |
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Gustavo Pimentel <[email protected]> |
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Description |
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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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Example |
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------- |
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Write TLPs traffic generation - Root Complex to Endpoint direction |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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Generate traffic:: |
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# echo 1 > /sys/class/misc/dw-xdata-pcie.0/write |
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Get link throughput in MB/s:: |
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# cat /sys/class/misc/dw-xdata-pcie.0/write |
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204 |
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Stop traffic in any direction:: |
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# echo 0 > /sys/class/misc/dw-xdata-pcie.0/write |
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Read TLPs traffic generation - Endpoint to Root Complex direction |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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Generate traffic:: |
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# echo 1 > /sys/class/misc/dw-xdata-pcie.0/read |
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Get link throughput in MB/s:: |
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# cat /sys/class/misc/dw-xdata-pcie.0/read |
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199 |
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Stop traffic in any direction:: |
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# echo 0 > /sys/class/misc/dw-xdata-pcie.0/read |
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