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