From: Adrien Mazarguil <adrien.mazarguil@6wind.com>
To: Shahaf Shuler <shahafs@mellanox.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
"Nélio Laranjeiro" <nelio.laranjeiro@6wind.com>,
"Xueming(Steven) Li" <xuemingl@mellanox.com>
Subject: Re: [dpdk-dev] [PATCH v4 07/10] net/mlx5: probe all port representors
Date: Tue, 10 Jul 2018 11:37:08 +0200 [thread overview]
Message-ID: <20180710093708.GH5211@6wind.com> (raw)
In-Reply-To: <DB7PR05MB44268AAE4ED225D96F0BB127C3440@DB7PR05MB4426.eurprd05.prod.outlook.com>
On Mon, Jul 09, 2018 at 11:57:29AM +0000, Shahaf Shuler wrote:
> Hi Adrien,
>
>
> Thursday, July 5, 2018 11:46 AM, Adrien Mazarguil:
> > Subject: [PATCH v4 07/10] net/mlx5: probe all port representors
> >
> > Probe existing port representors in addition to their master device and
> > associate them automatically.
> >
> > To avoid collision between Ethernet devices, they are named as follows:
> >
> > - "{DBDF}" for master/switch devices.
> > - "{DBDF}_representor_{rep}" with "rep" starting from 0 for port
> > representors.
> >
> > (Patch based on prior work from Yuanhan Liu)
> >
> > Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
> > Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
> > Reviewed-by: Xueming Li <xuemingl@mellanox.com>
> > Cc: Xueming Li <xuemingl@mellanox.com>
> > Cc: Shahaf Shuler <shahafs@mellanox.com>
> > --
> > v4 changes:
> >
> > - Fixed domain ID release once the last port using it is closed. Closed
> > devices are not necessarily detached, their presence is not a good
> > indicator. Code was modified to check if they still use their domain IDs
> > before deciding to release it.
<snip>
> > @@ -883,6 +915,41 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
> > priv->nl_socket_rdma = mlx5_nl_init(0, NETLINK_RDMA);
> > priv->nl_socket_route = mlx5_nl_init(RTMGRP_LINK,
> > NETLINK_ROUTE);
> > priv->nl_sn = 0;
> > + priv->representor = !!switch_info->representor;
> > + priv->domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
> > + priv->representor_id =
> > + switch_info->representor ? switch_info->port_name : -1;
> > + /*
> > + * Look for sibling devices in order to reuse their switch domain
> > + * if any, otherwise allocate one.
> > + */
> > + i = mlx5_dev_to_port_id(dpdk_dev, NULL, 0);
> > + if (i > 0) {
> > + uint16_t port_id[i];
> > +
> > + i = RTE_MIN(mlx5_dev_to_port_id(dpdk_dev, port_id, i), i);
> > + while (i--) {
> > + const struct priv *opriv =
> > + rte_eth_devices[port_id[i]].data-
> > >dev_private;
> > +
> > + if (!opriv ||
> > + opriv->domain_id ==
> > + RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID)
> > + continue;
> > + priv->domain_id = opriv->domain_id;
>
> It looks like for the second port it will use the domain_id of the first port. Is that what you intent?
Yes, it's on purpose. Master and representors of a given device must share
the same domain ID to let applications know they can create flow rules to
forward traffic between them all.
> Note - I couldn't test it due to compilation errors:
>
> /.autodirect/swgwork/shahafs/workspace/dpdk.org/drivers/net/mlx5/mlx5_nl.c: In function 'mlx5_nl_switch_info_cb':
> /.autodirect/swgwork/shahafs/workspace/dpdk.org/drivers/net/mlx5/mlx5_nl.c:843:8: error: 'IFLA_PHYS_PORT_NAME' undecl
> ared (first use in this function)
> case IFLA_PHYS_PORT_NAME:
> ^
> /.autodirect/swgwork/shahafs/workspace/dpdk.org/drivers/net/mlx5/mlx5_nl.c:843:8: note: each undeclared identifier is
> reported only once for each function it appears in
> /.autodirect/swgwork/shahafs/workspace/dpdk.org/drivers/net/mlx5/mlx5_nl.c:851:8: error: 'IFLA_PHYS_SWITCH_ID' undecl
> ared (first use in this function)
> case IFLA_PHYS_SWITCH_ID:
> ^
>
> My system info:
> NAME="Red Hat Enterprise Linux Server"
> VERSION="7.3 (Maipo)"
> ID="rhel"
> ID_LIKE="fedora"
> VERSION_ID="7.3"
> PRETTY_NAME="Red Hat Enterprise Linux Server 7.3 (Maipo)"
> ANSI_COLOR="0;31"
> CPE_NAME="cpe:/o:redhat:enterprise_linux:7.3:GA:server"
> HOME_URL="https://www.redhat.com/"
> BUG_REPORT_URL="https://bugzilla.redhat.com/"
>
> REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
> REDHAT_BUGZILLA_PRODUCT_VERSION=7.3
> REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
> REDHAT_SUPPORT_PRODUCT_VERSION="7.3"
> Red Hat Enterprise Linux Server release 7.3 (Maipo)
> Red Hat Enterprise Linux Server release 7.3 (Maipo)
OK, I'll redefine in v5 in case they are missing on the host system.
<snip>
> > diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h index
> > 704046270..cc01310e0 100644
> > --- a/drivers/net/mlx5/mlx5.h
> > +++ b/drivers/net/mlx5/mlx5.h
> > @@ -159,6 +159,7 @@ struct priv {
> > struct ibv_context *ctx; /* Verbs context. */
> > struct ibv_device_attr_ex device_attr; /* Device properties. */
> > struct ibv_pd *pd; /* Protection Domain. */
> > + char ibdev_name[IBV_SYSFS_NAME_MAX]; /* IB device name. */
>
>
> Why we need a dedicated entry for the ibdev_name? it is already part of priv->ctx->device->name.
Heh, same reason as the next line below, don't forget those damn secondaries
which can't dereference local pointers from the primary process :)
> > char ibdev_path[IBV_SYSFS_PATH_MAX]; /* IB device path for
> > secondary */
<snip>
> > struct rte_eth_dev_info *info)
> > info->speed_capa = priv->link_speed_capa;
> > info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
> > mlx5_set_default_params(dev, info);
> > + info->switch_info.name = dev->data->name;
> > + info->switch_info.domain_id = priv->domain_id;
> > + info->switch_info.port_id = priv->representor_id;
> > + if (priv->representor) {
> > + unsigned int i = mlx5_dev_to_port_id(dev->device, NULL, 0);
> > + uint16_t port_id[i];
> > +
> > + i = RTE_MIN(mlx5_dev_to_port_id(dev->device, port_id, i),
> > i);
> > + while (i--) {
> > + struct priv *opriv =
> > + rte_eth_devices[port_id[i]].data-
> > >dev_private;
> > +
> > + if (!opriv ||
> > + opriv->representor ||
> > + opriv->domain_id != priv->domain_id)
> > + continue;
> > + /*
> > + * Override switch name with that of the master
> > + * device.
> > + */
> > + info->switch_info.name = opriv->dev_data->name;
> > + break;
>
> According to this logic it means once the master device is closed, all the representors are no longer belong to the same switch (switch name of each is different) which is not correct.
They still share the same domain ID, which is what actually matters. The
switch name is only provided to let applications identify the master
(control) device in case it's needed.
> According to your notes it is possible to close master w/o closing the representor.
This allows devices to be probed in any order on a needed basis, not all at
once. It's done on purpose to pave the way for hotplug support.
> Why not just storing the master switch name when probing the representor and to use it as is on the dev_info?
The switch name *must* be that of the master device. If the master is not
probed, there can't be a switch name. However there's no real provision for
this in the API, so I chose the most acceptable unique name, which is the
name of the local device. Would you prefer an empty name instead?
Thing is, on mlx5 flow rules can be created directly between representors
without involving the master device. An empty switch name may be misleading
in this respect.
What do you suggest?
--
Adrien Mazarguil
6WIND
next prev parent reply other threads:[~2018-07-10 9:37 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-25 16:35 [dpdk-dev] [PATCH 0/7] net/mlx5: add port representor support Adrien Mazarguil
2018-05-25 16:35 ` [dpdk-dev] [PATCH 1/7] net/mlx5: rename confusing object in probe code Adrien Mazarguil
2018-06-10 11:00 ` Xueming(Steven) Li
2018-06-12 13:19 ` Adrien Mazarguil
2018-05-25 16:35 ` [dpdk-dev] [PATCH 2/7] net/mlx5: remove redundant objects " Adrien Mazarguil
2018-06-10 11:00 ` Xueming(Steven) Li
2018-06-12 13:19 ` Adrien Mazarguil
2018-05-25 16:35 ` [dpdk-dev] [PATCH 3/7] net/mlx5: split PCI from generic probing code Adrien Mazarguil
2018-06-10 12:59 ` Xueming(Steven) Li
2018-06-12 13:20 ` Adrien Mazarguil
2018-05-25 16:35 ` [dpdk-dev] [PATCH 4/7] net/mlx5: re-indent generic probing function Adrien Mazarguil
2018-06-11 11:42 ` Xueming(Steven) Li
2018-05-25 16:35 ` [dpdk-dev] [PATCH 5/7] net/mlx5: add port representor awareness Adrien Mazarguil
2018-05-25 16:35 ` [dpdk-dev] [PATCH 6/7] net/mlx5: probe all port representors Adrien Mazarguil
2018-06-12 6:42 ` Xueming(Steven) Li
2018-06-12 13:20 ` Adrien Mazarguil
2018-05-25 16:35 ` [dpdk-dev] [PATCH 7/7] net/mlx5: add parameter for " Adrien Mazarguil
2018-06-12 8:02 ` Xueming(Steven) Li
2018-06-12 13:20 ` Adrien Mazarguil
2018-06-12 13:43 ` Xueming(Steven) Li
2018-06-14 8:01 ` Adrien Mazarguil
2018-06-12 14:44 ` Xueming(Steven) Li
2018-06-13 13:11 ` Adrien Mazarguil
2018-06-14 8:34 ` [dpdk-dev] [PATCH v2 0/7] net/mlx5: add port representor support Adrien Mazarguil
2018-06-14 8:34 ` [dpdk-dev] [PATCH v2 1/7] net/mlx5: rename confusing object in probe code Adrien Mazarguil
2018-06-16 8:24 ` Xueming(Steven) Li
2018-06-14 8:34 ` [dpdk-dev] [PATCH v2 2/7] net/mlx5: remove redundant objects " Adrien Mazarguil
2018-06-16 8:27 ` Xueming(Steven) Li
2018-06-17 10:14 ` Shahaf Shuler
2018-06-27 13:30 ` Adrien Mazarguil
2018-06-28 5:35 ` Shahaf Shuler
2018-06-14 8:34 ` [dpdk-dev] [PATCH v2 3/7] net/mlx5: split PCI from generic probing code Adrien Mazarguil
2018-06-16 8:29 ` Xueming(Steven) Li
2018-06-17 10:14 ` Shahaf Shuler
2018-06-27 13:31 ` Adrien Mazarguil
2018-06-14 8:34 ` [dpdk-dev] [PATCH v2 4/7] net/mlx5: re-indent generic probing function Adrien Mazarguil
2018-06-14 8:34 ` [dpdk-dev] [PATCH v2 5/7] net/mlx5: add port representor awareness Adrien Mazarguil
2018-06-16 8:37 ` Xueming(Steven) Li
2018-06-27 13:32 ` Adrien Mazarguil
2018-06-14 8:35 ` [dpdk-dev] [PATCH v2 6/7] net/mlx5: probe all port representors Adrien Mazarguil
2018-06-16 8:57 ` Xueming(Steven) Li
2018-06-17 10:15 ` Shahaf Shuler
2018-06-24 13:33 ` Shahaf Shuler
2018-06-27 13:32 ` Adrien Mazarguil
2018-06-28 5:57 ` Shahaf Shuler
2018-06-28 9:13 ` Adrien Mazarguil
2018-06-27 13:32 ` Adrien Mazarguil
2018-06-27 17:30 ` Xueming(Steven) Li
2018-06-28 6:01 ` Shahaf Shuler
2018-06-28 8:45 ` Adrien Mazarguil
2018-06-28 9:06 ` Shahaf Shuler
2018-06-27 13:32 ` Adrien Mazarguil
2018-06-14 8:35 ` [dpdk-dev] [PATCH v2 7/7] net/mlx5: add parameter for " Adrien Mazarguil
2018-06-16 8:59 ` Xueming(Steven) Li
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 00/10] net/mlx5: add port representor support Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 01/10] net/mlx5: rename confusing object in probe code Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 02/10] net/mlx5: remove redundant objects " Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 03/10] net/mlx5: drop useless support for several Verbs ports Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 04/10] net/mlx5: split PCI from generic probing code Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 05/10] net/mlx5: re-indent generic probing function Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 06/10] net/mlx5: add port representor awareness Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 07/10] net/mlx5: probe all port representors Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 08/10] net/mlx5: probe port representors in natural order Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 09/10] net/mlx5: add parameter for port representors Adrien Mazarguil
2018-07-04 17:27 ` [dpdk-dev] [PATCH v3 10/10] net/mlx5: support negative identifiers " Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 00/10] net/mlx5: add port representor support Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 01/10] net/mlx5: rename confusing object in probe code Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 02/10] net/mlx5: remove redundant objects " Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 03/10] net/mlx5: drop useless support for several Verbs ports Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 04/10] net/mlx5: split PCI from generic probing code Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 05/10] net/mlx5: re-indent generic probing function Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 06/10] net/mlx5: add port representor awareness Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 07/10] net/mlx5: probe all port representors Adrien Mazarguil
2018-07-09 11:57 ` Shahaf Shuler
2018-07-10 9:37 ` Adrien Mazarguil [this message]
2018-07-10 10:13 ` Shahaf Shuler
2018-07-10 10:58 ` Adrien Mazarguil
2018-07-10 11:17 ` Shahaf Shuler
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 08/10] net/mlx5: probe port representors in natural order Adrien Mazarguil
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 09/10] net/mlx5: add parameter for port representors Adrien Mazarguil
2018-07-09 11:57 ` Shahaf Shuler
2018-07-10 9:37 ` Adrien Mazarguil
2018-07-10 10:16 ` Shahaf Shuler
2018-07-10 10:58 ` Adrien Mazarguil
2018-07-10 11:15 ` Shahaf Shuler
2018-07-05 8:45 ` [dpdk-dev] [PATCH v4 10/10] net/mlx5: support negative identifiers " Adrien Mazarguil
2018-07-09 11:58 ` Shahaf Shuler
2018-07-10 9:37 ` Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 00/10] net/mlx5: add port representor support Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 01/10] net/mlx5: rename confusing object in probe code Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 02/10] net/mlx5: remove redundant objects " Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 03/10] net/mlx5: drop useless support for several Verbs ports Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 04/10] net/mlx5: split PCI from generic probing code Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 05/10] net/mlx5: re-indent generic probing function Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 06/10] net/mlx5: add port representor awareness Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 07/10] net/mlx5: probe all port representors Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 08/10] net/mlx5: probe port representors in natural order Adrien Mazarguil
2018-07-10 16:04 ` [dpdk-dev] [PATCH v5 09/10] net/mlx5: add parameter for port representors Adrien Mazarguil
2018-07-10 16:05 ` [dpdk-dev] [PATCH v5 10/10] net/mlx5: support negative identifiers " Adrien Mazarguil
2018-07-12 7:51 ` [dpdk-dev] [PATCH v5 00/10] net/mlx5: add port representor support Shahaf Shuler
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180710093708.GH5211@6wind.com \
--to=adrien.mazarguil@6wind.com \
--cc=dev@dpdk.org \
--cc=nelio.laranjeiro@6wind.com \
--cc=shahafs@mellanox.com \
--cc=xuemingl@mellanox.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).