1 .. SPDX-License-Identifier: GPL-2.0
2
3 ==============================================
4 Driver for Synopsys DesignWare PCIe traffic ge
5 ==============================================
6
7 Supported chips:
8 Synopsys DesignWare PCIe prototype solution
9
10 Datasheet:
11 Not freely available
12
13 Author:
14 Gustavo Pimentel <gustavo.pimentel@synopsys.com
15
16 Description
17 -----------
18
19 This driver should be used as a host-side (Roo
20 DesignWare prototype that includes this IP.
21
22 The dw-xdata-pcie driver can be used to enable
23 generator in either direction (mutual exclusio
24 PCIe link performance analysis.
25
26 The interaction with this driver is done throu
27 can be changed in runtime. The driver outputs
28 information to ``/var/log/kern.log`` or dmesg.
29
30 Example
31 -------
32
33 Write TLPs traffic generation - Root Complex t
34 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
35
36 Generate traffic::
37
38 # echo 1 > /sys/class/misc/dw-xdata-pcie.0/wr
39
40 Get link throughput in MB/s::
41
42 # cat /sys/class/misc/dw-xdata-pcie.0/write
43 204
44
45 Stop traffic in any direction::
46
47 # echo 0 > /sys/class/misc/dw-xdata-pcie.0/wr
48
49 Read TLPs traffic generation - Endpoint to Roo
50 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
51
52 Generate traffic::
53
54 # echo 1 > /sys/class/misc/dw-xdata-pcie.0/re
55
56 Get link throughput in MB/s::
57
58 # cat /sys/class/misc/dw-xdata-pcie.0/read
59 199
60
61 Stop traffic in any direction::
62
63 # echo 0 > /sys/class/misc/dw-xdata-pcie.0/re
64
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