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List: dpdk-users
Subject: Re: NIC is unavailable in DPDK application
From: Danil Onishchenko <danil.onishchenko.info () gmail ! com>
Date: 2022-03-31 13:20:41
Message-ID: aae30fec-c058-83ad-e9fc-c7de4e14db8c () gmail ! com
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Thank you for your reply!
On 29.03.2022 15:43, Дмитрий Степанов wrote:
> Hey!
> Realtek NICs are not supported by DPDK.
> You can check the list of supported HW here -
> https://core.dpdk.org/supported/
> As a workaround you can setup virtual machine (e.g. using KVM) with
> virtual NIC which is supported by DPDK (e.g. vmxnet3)
>
> BTW: here is an article where someone tried to write his own PMD for
> Realtek NIC -
> https://medium.com/powerof2/writing-a-pmd-for-dpdk-56e6388467a8
>
>
>
> вт, 29 мар. 2022 г. в 11:21, Danil Onishchenko
> <danil.onishchenko.info@gmail.com>:
>
> Hello,
>
> I'm studying DPDK and trying to create a simple application,
> however it
> can't see a NIC bound to DPDK.
>
> 1. Here is a list of network devices I have on my machine
>
> $ dpdk-devbind.py --status-dev net
>
> Network devices using kernel driver
> ===================================
> 0000:01:00.0 'RTL8111/8168/8411 PCI Express Gigabit Ethernet
> Controller
> 8168' if=enp1s0 drv=r8169 unused=vfio-pci *Active*
> 0000:02:00.0 'RTL8822BE 802.11a/b/g/n/ac WiFi adapter b822' if=wlp2s0
> drv=rtw_8822be unused=rtw88_8822be,vfio-pci *Active*
>
> 2. I disable my ethernet NIC (it can't be bound to DPDK while it is
> active) and bind it to vfio-pci driver successfully
>
> $ ip link set enp1s0 down
> $ dpdk-devbind.py -b vfio-pci enp1s0
>
> 3. Now dpdk-devbind.py shows that the NIC is using DPDK-compatible
> driver
>
> $ dpdk-devbind.py --status-dev net
>
> Network devices using DPDK-compatible driver
> ============================================
> 0000:01:00.0 'RTL8111/8168/8411 PCI Express Gigabit Ethernet
> Controller
> 8168' drv=vfio-pci unused=r8169
>
> Network devices using kernel driver
> ===================================
> 0000:02:00.0 'RTL8822BE 802.11a/b/g/n/ac WiFi adapter b822' if=wlp2s0
> drv=rtw_8822be unused=rtw88_8822be,vfio-pci *Active*
>
> 4. However when I run any example DPDK application it says that there
> are no available NIC ports. For instance I wrote a simple application
>
> int main(int argc, char *argv[])
> {
> int ret;
> int total_ports, avail_ports;
>
> ret = rte_eal_init(argc, argv);
> if( ret < 0 )
> rte_exit(EXIT_FAILURE, "EAL initialization failed\n");
>
> total_ports = rte_eth_dev_count_total();
> avail_ports = rte_eth_dev_count_avail();
> printf("ETH PORTS %d %d\n", total_ports, avail_ports);
>
> rte_eal_cleanup();
>
> return 0;
> }
>
> and both rte_eth_dev_count_total() and rte_eth_dev_count_avail()
> return 0.
>
> What am I doing wrong?
>
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<p>Thank you for your reply!<br>
</p>
<div class="moz-cite-prefix">On 29.03.2022 15:43, Дмитрий Степанов
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CA+-SuJ0jEA+ALt_WZE2H_3v3AN01Gqef9m2qN0BvW-eKYP_Bow@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hey!
<div>Realtek NICs are not supported by DPDK.</div>
<div>You can check the list of supported HW here - <a
href="https://core.dpdk.org/supported/"
moz-do-not-send="true" \
class="moz-txt-link-freetext">https://core.dpdk.org/supported/</a></div> <div>As a \
workaround you can setup virtual machine (e.g. using KVM) with virtual NIC which is \
supported by DPDK (e.g. vmxnet3)</div>
<div><br>
</div>
<div>BTW: here is an article where someone tried to write his
own PMD for Realtek NIC - <a
href="https://medium.com/powerof2/writing-a-pmd-for-dpdk-56e6388467a8"
moz-do-not-send="true" \
class="moz-txt-link-freetext">https://medium.com/powerof2/writing-a-pmd-for-dpdk-56e6388467a8</a></div>
<div><br>
<div><br>
</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">вт, 29 мар. 2022 г. в 11:21,
Danil Onishchenko <<a
href="mailto:danil.onishchenko.info@gmail.com"
moz-do-not-send="true" \
class="moz-txt-link-freetext">danil.onishchenko.info@gmail.com</a>>:<br> </div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello,<br>
<br>
I'm studying DPDK and trying to create a simple application,
however it <br>
can't see a NIC bound to DPDK.<br>
<br>
1. Here is a list of network devices I have on my machine<br>
<br>
$ dpdk-devbind.py --status-dev net<br>
<br>
Network devices using kernel driver<br>
===================================<br>
0000:01:00.0 'RTL8111/8168/8411 PCI Express Gigabit Ethernet
Controller <br>
8168' if=enp1s0 drv=r8169 unused=vfio-pci *Active*<br>
0000:02:00.0 'RTL8822BE 802.11a/b/g/n/ac WiFi adapter b822'
if=wlp2s0 <br>
drv=rtw_8822be unused=rtw88_8822be,vfio-pci *Active*<br>
<br>
2. I disable my ethernet NIC (it can't be bound to DPDK while
it is <br>
active) and bind it to vfio-pci driver successfully<br>
<br>
$ ip link set enp1s0 down<br>
$ dpdk-devbind.py -b vfio-pci enp1s0<br>
<br>
3. Now dpdk-devbind.py shows that the NIC is using
DPDK-compatible driver<br>
<br>
$ dpdk-devbind.py --status-dev net<br>
<br>
Network devices using DPDK-compatible driver<br>
============================================<br>
0000:01:00.0 'RTL8111/8168/8411 PCI Express Gigabit Ethernet
Controller <br>
8168' drv=vfio-pci unused=r8169<br>
<br>
Network devices using kernel driver<br>
===================================<br>
0000:02:00.0 'RTL8822BE 802.11a/b/g/n/ac WiFi adapter b822'
if=wlp2s0 <br>
drv=rtw_8822be unused=rtw88_8822be,vfio-pci *Active*<br>
<br>
4. However when I run any example DPDK application it says
that there <br>
are no available NIC ports. For instance I wrote a simple
application<br>
<br>
int main(int argc, char *argv[])<br>
{<br>
int ret;<br>
int total_ports, avail_ports;<br>
<br>
ret = rte_eal_init(argc, argv);<br>
if( ret < 0 )<br>
rte_exit(EXIT_FAILURE, "EAL initialization
failed\n");<br>
<br>
total_ports = rte_eth_dev_count_total();<br>
avail_ports = rte_eth_dev_count_avail();<br>
printf("ETH PORTS %d %d\n", total_ports, avail_ports);<br>
<br>
rte_eal_cleanup();<br>
<br>
return 0;<br>
}<br>
<br>
and both rte_eth_dev_count_total() and
rte_eth_dev_count_avail() return 0.<br>
<br>
What am I doing wrong?<br>
<br>
</blockquote>
</div>
</blockquote>
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</html>
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