Xilinx QDMA软件简明教程

概述

所有工具和参考设计使用2021.2。编译和测试X86主机（Host）的操作系统是CentOS 7.9.2009。测试的单板是VCK190，测试的是CPM QDMA。

记录和脚本里的井，或者第一行开始处的井，由于和Markdown语法有冲突，替换成了星。有些软件打印的记录非常长，于是把其中部分内容替换成了“……”。

同事马鸿伟（hongweim@xilinx.com）在测试过程中提供了很大的帮助，非常感谢。

资源

2.1. Linux内核驱动

X86 PCIe Host侧的Linux内核驱动：

https://github.com/Xilinx/dma_ip_drivers/QDMA/linux-kernel

简单来说，使用命令“make”可以编译，使用命令“sudo make install”可以安装驱动。测试中，使用了2020.1分支。

2.2. 文档2.2.1. QDMA PCIe v4.0 PG302

QDMA Subsystem for PCI Express v4.0 Product Guide PG302 (v4.0) January 5, 2022

2.2.2. 驱动简要说明

X86 PCIe Host侧的Linux内核驱动里有简要说明。

https://github.com/Xilinx/dma_ip_drivers/tree/master/QDMA/linux-kernel/docs

2.2.3. Github.io document

xilinx.github.io有更详细的文档，比较全面。

https://xilinx.github.io/dma_ip_drivers/2020.1/linux-kernel/html/index.html

2. 测试流程2.1. 总体测试流程

如果只使用PCIe 物理功能（PF），不使用虚拟功能（VF），QDMA的总体测试流程如下。

查找PCIe设备
确保Linux加载QDMA驱动
创建QDMA队列
启动QDMA队列
启动QDMA传输
停止QDMA队列
删除QDMA队列

操作队列时，需要提供队列的从0开始编的序（index）。另外，C2H和H2C分开计数序（index），也就是C2H和H2C可以使用相同的数序（index）。

2.2. 测试工具dma-ctl

dma-ctl是测试的配置工具，可以列出qdma设备、队列；也可以创建、删除、启动、停止队列。下面是它的帮助信息。

Usage: dma-ctl [dev|qdma[vf]<N>] [operation]

dev [operation]: system wide FPGA operations

list list all qdma functions

qdma[N] [operation]: per QDMA FPGA operations

cap…. lists the Hardware and Software version and capabilities

stat statistics of qdma[N] device

stat clear clear all statistics data of qdma[N} device

global_csr dump the Global CSR of qdma[N} device

q list list all queues

q add idx <N> [mode <mm|st>] [dir <h2c|c2h|bi|cmpt>] – add a queue

*mode default to mm

*dir default to h2c

q add list <start_idx> <num_Qs> [mode <mm|st>] [dir <h2c|c2h|bi|cmpt>] – add multiple queues at once

q start idx <N> [dir <h2c|c2h|bi|cmpt>] [idx_ringsz <0:15>] [idx_bufsz <0:15>] [idx_tmr <0:15>]

[mm_chn <0|1>] [desc_bypass_en] [pfetch_en] [pfetch_bypass_en] [dis_cmpl_status]

[dis_cmpl_status_acc] [dis_cmpl_status_pend_chk] [c2h_udd_en]

[cmpl_ovf_dis] [fetch_credit <h2c|c2h|bi|none>] [dis_cmpl_status] [c2h_cmpl_intr_en] – start a single queue

q start list <start_idx> <num_Qs> [dir <h2c|c2h|bi|cmpt>] [idx_bufsz <0:15>] [idx_tmr <0:15>]

[mm_chn <0|1>] [desc_bypass_en] [pfetch_en] [pfetch_bypass_en] [dis_cmpl_status]

[dis_cmpl_status_acc] [dis_cmpl_status_pend_chk] [cmpl_ovf_dis]

[fetch_credit <h2c|c2h|bi|none>] [dis_cmpl_status] [c2h_cmpl_intr_en] – start multiple queues at once

q stop idx <N> dir [<h2c|c2h|bi|cmpt>] – stop a single queue

q stop list <start_idx> <num_Qs> dir [<h2c|c2h|bi|cmpt>] – stop list of queues at once

q del idx <N> dir [<h2c|c2h|bi|cmpt>] – delete a queue

q del list <start_idx> <num_Qs> dir [<h2c|c2h|bi|cmpt>] – delete list of queues at once

q dump idx <N> dir [<h2c|c2h|bi|cmpt>] dump queue param

q dump list <start_idx> <num_Qs> dir [<h2c|c2h|bi|cmpt>] – dump queue param

q dump idx <N> dir [<h2c|c2h|bi>] desc <x> <y> – dump desc ring entry x ~ y

q dump list <start_idx> <num_Qs> dir [<h2c|c2h|bi>] desc <x> <y> – dump desc ring entry x ~ y

q dump idx <N> dir [<h2c|c2h|bi|cmpt>] cmpt <x> <y> – dump cmpt ring entry x ~ y

q dump list <start_idx> <num_Qs> dir [<h2c|c2h|bi|cmpt>] cmpt <x> <y> – dump cmpt ring entry x ~ y

q cmpt_read idx <N> – read the completion data

reg dump [dmap <Q> <N>] – register dump. Only dump dmap registers if dmap is specified.

specify dmap range to dump: Q=queue, N=num of queues

reg read [bar <N>] <addr> – read a register

reg write [bar <N>] <addr> <val> – write a register

intring dump vector <N> <start_idx> <end_idx> – interrupt ring dump for vector number <N>

for intrrupt entries :<start_idx> — <end_idx>

下面是列出qdma设备的例子。

[root@localhost pcie]# dma-ctl dev list

qdma01000 0000:01:00.0 max QP: 32, 0~31

下面是qdma队列操作的例子。

[root@localhost pcie]# ls /dev/qdma*

ls: cannot access /dev/qdma*: No such file or directory

[root@localhost pcie]# dma-ctl qdma01000 q list

Zero Qs

Test Xilinx PCIe QDMA h2c channel.

[root@localhost pcie]# dma-ctl qdma01000 q add idx 0 mode mm dir h2c

qdma01000-MM-0 H2C added.

Added 1 Queues.

[root@localhost pcie]# ls /dev/qdma*

/dev/qdma01000-MM-0

[root@localhost pcie]# dma-ctl qdma01000 q start idx 0 dir h2c

dma-ctl: Info: Default ring size set to 2048

1 Queues started, idx 0 ~ 0.

[root@localhost pcie]# dma-ctl qdma01000 q list

H2C Q: 1, C2H Q: 0, CMPT Q 0.

qdma01000-MM-0 H2C online

[root@localhost pcie]# dma-ctl qdma01000 q stop idx 0 dir h2c

Stopped Queues 0 -> 0.

[root@localhost pcie]# dma-ctl qdma01000 q del idx 0 dir h2c

Deleted Queues 0 -> 0.

[root@localhost pcie]# dma-ctl qdma01000 q list

Zero Qs

[root@localhost pcie]# dma-ctl qdma01000 stat

qdma01000:statistics

Total MM H2C packets processed = 34000

Total MM C2H packets processed = 17

Total ST H2C packets processed = 0

Total ST C2H packets processed = 0

Min Ping Pong Latency = 0

Max Ping Pong Latency = 0

Avg Ping Pong Latency = 0

[root@localhost pcie]# ls /dev/qdma*

ls: cannot access /dev/qdma*: No such file or directory

注意，只有在有qdma队列的时候，在系统目录“/dev/”下，才有qdma设备，执行命令“ls /dev/qdma*”才有设备节点。

重复添加同样序的队列，会告错误“Queue compatibility check failed against existing queues”。应该删除同样序的队列后，才添加同样序的队列。

[root@localhost pcie]# dma-ctl qdma01000 q add idx 0 mode mm dir h2c

qdma01000-MM-0 H2C added.

Added 1 Queues.

[root@localhost pcie]# dma-ctl qdma01000 q add idx 0 mode mm dir h2c

Queue compatibility check failed against existing queues

重复启动同样序的队列，会告错误“Error. Required Q state=cfg’ed, Current Q state=online”。应该停止同样序的队列后，才启动同样序的队列。

[root@localhost pcie]# dma-ctl qdma01000 q start idx 0 dir h2c

dma-ctl: Info: Default ring size set to 2048

1 Queues started, idx 0 ~ 0.

[root@localhost pcie]# dma-ctl qdma01000 q start idx 0 dir h2c

dma-ctl: Info: Default ring size set to 2048

Error. Required Q state=cfg’ed, Current Q state=online

2.3. 测试工具dma-to-device

dma-to-device可以用于发起X86 Host到PCIe Card数据传输测试的工具，下面是它的帮助信息。

[hankf@localhost pcie]$ dma-to-device –help

dma-to-device

usage: dma-to-device [OPTIONS]

Write via SGDMA, optionally read input from a file.

-d (–device) device (defaults to /dev/qdma01000-MM-0)

-a (–address) the start address on the AXI bus

-s (–size) size of a single transfer in bytes, default 32,

-o (–offset) page offset of transfer

-c (–count) number of transfers, default 1

-f (–data infile) filename to read the data from.

-w (–data outfile) filename to write the data of the transfers

-h (–help) print usage help and exit

-v (–verbose) verbose output

下面是在启动队列后，运行命令“dma-to-device”的信息。

[root@localhost pcie]# dma-to-device -d /dev/qdma01000-MM-0 -s 65536 -c 1000

如果设备没有启动，虽然也有设备节点，dma-to-device会执行失败，输出信息如下：

[root@localhost pcie]# ls /dev/qdma*

/dev/qdma01000-MM-0

[root@localhost pcie]# dma-to-device -d /dev/qdma01000-MM-0 -s 4096 -c 1000

/dev/qdma01000-MM-0, W off 0x0, 0x1000 failed -1.

write file: Invalid argument

2.4. 测试工具dma-from-device

dma-from-device可以用于发起X86 Host到PCIe Card数据传输测试的工具，下面是它的帮助信息。

[root@localhost qdma]# dma-from-device –help

dma-from-device

usage: dma-from-device [OPTIONS]

Read via SGDMA, optionally save output to a file

-d (–device) device (defaults to /dev/qdma01000-MM-0)

-a (–address) the start address on the AXI bus

-s (–size) size of a single transfer in bytes, default 32.

-o (–offset) page offset of transfer

-c (–count) number of transfers, default is 1.

-f (–file) file to write the data of the transfers

-h (–help) print usage help and exit

-v (–verbose) verbose output

下面是在启动队列后，运行命令“dma-from-device”的信息。

[root@localhost pcie]# ls /dev/qdma*

/dev/qdma01000-MM-0

[root@localhost pcie]# dma-from-device -d /dev/qdma01000-MM-0 -s 65536

2.5. 测试脚本

*!/bin/bash

* Example: QDMA_BUS_NO=01

if [ “$QDMA_BUS_NO” = “” ]; then

QDMA_BUS_NO=01

echo -e “nUse PCIe bus number: $QDMA_BUS_NO”

if [ “$QDMA_DEV_NO” = “” ]; then

QDMA_DEV_NO=00

echo -e “nUse PCIe device number: $QDMA_DEV_NO”

QDMA_FUNC_NO=0

* QDMA_DEV_NAME: example: qdma01000

QDMA_DEV_NAME=qdma$QDMA_BUS_NO$QDMA_DEV_NO$QDMA_FUNC_NO

echo -e “nUse PCIe device name: $QDMA_DEV_NAME”

echo -e “nCheck system information”

lsb_release -a

dmidecode |grep -A16 “System Information$”

echo -e “nCheck Xilinx PCIe board information”

lspci | grep -i xilinx

lspci -vvv -s $QDMA_BUS_NO:$QDMA_DEV_NO.0

lsmod | grep -i xilinx

lsmod | grep -i qdma

dmesg | grep qdma

echo -e “nConfigure Xilinx PCIe QDMA.”

ls -l -a /sys/bus/pci/devices/

cd /sys/bus/pci/devices/0000:$QDMA_BUS_NO:$QDMA_DEV_NO.0/qdma/

ls -l

cat qmax

* [root@localhost qdma]# echo 32 > qmax

* bash: echo: write error: Invalid argument

echo 32 > qmax

cat qmax

echo 2>intr_rngsz

cat intr_rngsz

dma-ctl dev list

dma-ctl $QDMA_DEV_NAME cap

dma-ctl $QDMA_DEV_NAME stat

echo -e “nList Xilinx PCIe QDMA queues.”

dma-ctl $QDMA_DEV_NAME q list

echo -e “nTest Xilinx PCIe QDMA h2c channel.”

dma-ctl $QDMA_DEV_NAME q add idx 0 mode mm dir h2c

ls /dev/qdma*

dma-ctl $QDMA_DEV_NAME q start idx 0 dir h2c

dma-to-device -d /dev/$QDMA_DEV_NAME-MM-0 -s 4096 -c 1000

dma-to-device -d /dev/$QDMA_DEV_NAME-MM-0 -s 65536 -c 1000

dma-ctl $QDMA_DEV_NAME q stop idx 0 dir h2c

dma-ctl $QDMA_DEV_NAME q del idx 0 dir h2c

dma-ctl $QDMA_DEV_NAME stat

echo -e “nTest Xilinx PCIe QDMA c2h channel.”

dma-ctl $QDMA_DEV_NAME q add idx 0 mode mm dir c2h

ls /dev/qdma*

dma-ctl $QDMA_DEV_NAME q start idx 0 dir c2h

dma-from-device -d /dev/$QDMA_DEV_NAME-MM-0 -s 4096

dma-from-device -d /dev/$QDMA_DEV_NAME-MM-0 -s 65536

dma-ctl $QDMA_DEV_NAME q stop idx 0 dir c2h

dma-ctl $QDMA_DEV_NAME q del idx 0 dir c2h

dma-ctl $QDMA_DEV_NAME stat

echo -e “nTest done.”

它执行的输出信息如下：

[root@localhost pcie]# ./qdma-test-cmd.sh

Begin to run : ./qdma-test-cmd.sh

Run : ./qdma-test-cmd.sh as root user!!!

Usage: ./qdma-test-cmd.sh pcie_bus_number pcie_device_number

Use PCIe bus number: 01

Use PCIe device number: 00

Use PCIe device name: qdma01000

Check system information

LSB Version: :core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch

Distributor ID: CentOS

Deion: CentOS Linux release 7.9.2009 (Core)

Release: 7.9.2009

Codename: Core

System Information

Manufacturer: ASUS

Product Name: System Product Name

Version: System Version

Serial Number: System Serial Number

UUID: 8c1cddc3-8472-bd61-6e23-d45d64ef96f0

Wake-up Type: Power Switch

SKU Number: SKU

Family: Default string

Handle 0x0002, DMI type 2, 15 bytes

Base Board Information

Manufacturer: ASUSTeK COMPUTER INC.

Product Name: ROG STRIX Z490-F GAMING

Version: Rev 1.xx

Asset Tag: Default string

Check Xilinx PCIe board information

01:00.0 RAM memory: Xilinx Corporation Device b03f

Subsystem: Xilinx Corporation Device 0007

Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+

Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

Latency: 0, Cache Line Size: 64 bytes

Region 1: Memory at a0000000 (32-bit, non-prefetchable) [size=32M]

Capabilities: [40] Power Management version 3

Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0+,D1+,D2-,D3hot+,D3cold+)

Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-

Capabilities: [60] MSI-X: Enable+ Count=8 Masked-

Vector table: BAR=0 offset=00002000

PBA: BAR=0 offset=00001400

Capabilities: [70] Express (v2) Endpoint, MSI 00

DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us

ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 75.000W

DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-

RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ FLReset-

MaxPayload 256 bytes, MaxReadReq 512 bytes

DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-

LnkCap: Port #0, Speed 16GT/s, Width x8, ASPM not supported, Exit Latency L0s unlimited, L1 unlimited

ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+

LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+

ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-

LnkSta: Speed 8GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-

DevCap2: Completion Timeout: Range BC, TimeoutDis+, LTR-, OBFF Not Supported

DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled

LnkCtl2: Target Link Speed: 16GT/s, EnterCompliance- SpeedDis-

Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-

Compliance De-emphasis: -6dB

LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+, EqualizationPhase1+

EqualizationPhase2+, EqualizationPhase3+, LinkEqualizationRequest-

Capabilities: [100 v1] Advanced Error Reporting

UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-

UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-

UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-

CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-

CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+

AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn-

Capabilities: [140 v1] Single Root I/O Virtualization (SR-IOV)

IOVCap: Migration-, Interrupt Message Number: 000

IOVCtl: Enable- Migration- Interrupt- MSE- ARIHierarchy-

IOVSta: Migration-

Initial VFs: 64, Total VFs: 64, Number of VFs: 0, Function Dependency Link: 00

VF offset: 4, stride: 1, Device ID: c03f

Supported Page Size: 0000016b, System Page Size: 00000001

VF Migration: offset: 00000000, BIR: 0

Capabilities: [180 v1] Alternative Routing-ID Interpretation (ARI)

ARICap: MFVC- ACS-, Next Function: 4

ARICtl: MFVC- ACS-, Function Group: 0

Capabilities: [1c0 v1] #19

Capabilities: [3a0 v1] #25

Capabilities: [3b0 v1] #26

Capabilities: [400 v1] #27

Kernel driver in use: qdma-pf

Kernel modules: qdma_pf

Configure Xilinx PCIe QDMA.

total 0

drwxr-xr-x. 2 root root 0 Feb 14 22:51 .

drwxr-xr-x. 5 root root 0 Feb 14 17:49 ..

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:00.0 -> ../../../devices/pci0000:00/0000:00:00.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:01.0 -> ../../../devices/pci0000:00/0000:00:01.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:02.0 -> ../../../devices/pci0000:00/0000:00:02.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:14.0 -> ../../../devices/pci0000:00/0000:00:14.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:14.2 -> ../../../devices/pci0000:00/0000:00:14.2

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:15.0 -> ../../../devices/pci0000:00/0000:00:15.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:15.1 -> ../../../devices/pci0000:00/0000:00:15.1

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:16.0 -> ../../../devices/pci0000:00/0000:00:16.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:17.0 -> ../../../devices/pci0000:00/0000:00:17.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1b.0 -> ../../../devices/pci0000:00/0000:00:1b.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1c.0 -> ../../../devices/pci0000:00/0000:00:1c.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1c.4 -> ../../../devices/pci0000:00/0000:00:1c.4

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1c.5 -> ../../../devices/pci0000:00/0000:00:1c.5

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1d.0 -> ../../../devices/pci0000:00/0000:00:1d.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1f.0 -> ../../../devices/pci0000:00/0000:00:1f.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1f.3 -> ../../../devices/pci0000:00/0000:00:1f.3

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1f.4 -> ../../../devices/pci0000:00/0000:00:1f.4

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:00:1f.5 -> ../../../devices/pci0000:00/0000:00:1f.5

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:01:00.0 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:04:00.0 -> ../../../devices/pci0000:00/0000:00:1c.4/0000:04:00.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:05:00.0 -> ../../../devices/pci0000:00/0000:00:1c.5/0000:05:00.0

lrwxrwxrwx. 1 root root 0 Feb 14 17:49 0000:06:00.0 -> ../../../devices/pci0000:00/0000:00:1d.0/0000:06:00.0

total 0

-rw-r–r–. 1 root root 4096 Feb 14 22:51 buf_sz

-rw-r–r–. 1 root root 4096 Feb 14 22:51 c2h_cnt_th

-rw-r–r–. 1 root root 4096 Feb 14 22:51 c2h_timer_cnt

-rw-r–r–. 1 root root 4096 Feb 14 22:51 cmpl_status_acc

-rw-r–r–. 1 root root 4096 Feb 14 22:51 glbl_rng_sz

-rw-r–r–. 1 root root 4096 Feb 14 22:51 intr_rngsz

-rw-r–r–. 1 root root 4096 Feb 14 22:51 qmax

qdma01000 0000:01:00.0 max QP: 32, 0~31

=============Hardware Version============

RTL Version : RTL Base

Vivado ReleaseID : vivado 2019.2

QDMA Device Type : Versal S80 Hard IP

QDMA IP Type : Versal Hard IP

============Software Version============

qdma driver version : 2020.1.=============Hardware Capabilities============

Number of PFs supported : 1

Total number of queues supported : 2048

MM channels : 2

FLR Present : yes

ST enabled : yes

MM enabled : yes

Mailbox enabled : no

MM completion enabled : no

qdma01000:statistics

Total MM H2C packets processed = 0

Total MM C2H packets processed = 0

Total ST H2C packets processed = 0

Total ST C2H packets processed = 0

Min Ping Pong Latency = 0

Max Ping Pong Latency = 0

Avg Ping Pong Latency = 0

List Xilinx PCIe QDMA queues.

Zero Qs

Test Xilinx PCIe QDMA h2c channel.

qdma01000-MM-0 H2C added.

Added 1 Queues.

/dev/qdma01000-MM-0

dma-ctl: Info: Default ring size set to 2048

1 Queues started, idx 0 ~ 0.

** Average BW = 4096, 592.050415

Stopped Queues 0 -> 0.

Deleted Queues 0 -> 0.

qdma01000:statistics

Total MM H2C packets processed = 17000

Total MM C2H packets processed = 0

Total ST H2C packets processed = 0

Total ST C2H packets processed = 0

Min Ping Pong Latency = 0

Max Ping Pong Latency = 0

Avg Ping Pong Latency = 0

Test Xilinx PCIe QDMA c2h channel.

qdma01000-MM-0 C2H added.

Added 1 Queues.

/dev/qdma01000-MM-0

dma-ctl: Info: Default ring size set to 2048

1 Queues started, idx 0 ~ 0.

** Average BW = 4096, 389.094696

Stopped Queues 0 -> 0.

Deleted Queues 0 -> 0.

qdma01000:statistics

Total MM H2C packets processed = 17000

Total MM C2H packets processed = 17

Total ST H2C packets processed = 0

Total ST C2H packets processed = 0

Min Ping Pong Latency = 0

Max Ping Pong Latency = 0

Avg Ping Pong Latency = 0

Test done.

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Xilinx QDMA软件简明教程

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