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Message-ID: <CAKKgK4w5zWmrjkTOPgp8QhyXdQpNMrWiRT1DwshiED-hKvJ8wA@mail.gmail.com>
Date: Fri, 7 May 2021 16:57:08 +0300
From: Shai Malin <malin1024@...il.com>
To: Hannes Reinecke <hare@...e.de>
Cc: Shai Malin <smalin@...vell.com>, netdev@...r.kernel.org,
linux-nvme@...ts.infradead.org, davem@...emloft.net,
kuba@...nel.org, sagi@...mberg.me, hch@....de, axboe@...com,
kbusch@...nel.org, Ariel Elior <aelior@...vell.com>,
Michal Kalderon <mkalderon@...vell.com>, okulkarni@...vell.com,
pkushwaha@...vell.com, Nikolay Assa <nassa@...vell.com>
Subject: Re: [RFC PATCH v4 18/27] qedn: Add qedn_claim_dev API support
On 5/2/21 2:29 PM, Hannes Reinecke wrote:
> On 4/29/21 9:09 PM, Shai Malin wrote:
> > From: Nikolay Assa <nassa@...vell.com>
> >
> > This patch introduces the qedn_claim_dev() network service which the
> > offload device (qedn) is using through the paired net-device (qede).
> > qedn_claim_dev() returns true if the IP addr(IPv4 or IPv6) of the target
> > server is reachable via the net-device which is paired with the
> > offloaded device.
> >
> > Acked-by: Igor Russkikh <irusskikh@...vell.com>
> > Signed-off-by: Nikolay Assa <nassa@...vell.com>
> > Signed-off-by: Prabhakar Kushwaha <pkushwaha@...vell.com>
> > Signed-off-by: Omkar Kulkarni <okulkarni@...vell.com>
> > Signed-off-by: Michal Kalderon <mkalderon@...vell.com>
> > Signed-off-by: Ariel Elior <aelior@...vell.com>
> > Signed-off-by: Shai Malin <smalin@...vell.com>
> > ---
> > drivers/nvme/hw/qedn/qedn.h | 4 +++
> > drivers/nvme/hw/qedn/qedn_main.c | 42 ++++++++++++++++++++++++++++++--
> > 2 files changed, 44 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/nvme/hw/qedn/qedn.h b/drivers/nvme/hw/qedn/qedn.h
> > index c1ac17eabcb7..7efe2366eb7c 100644
> > --- a/drivers/nvme/hw/qedn/qedn.h
> > +++ b/drivers/nvme/hw/qedn/qedn.h
> > @@ -8,6 +8,10 @@
> >
> > #include <linux/qed/qed_if.h>
> > #include <linux/qed/qed_nvmetcp_if.h>
> > +#include <linux/qed/qed_nvmetcp_ip_services_if.h>
> > +#include <linux/qed/qed_chain.h>
> > +#include <linux/qed/storage_common.h>
> > +#include <linux/qed/nvmetcp_common.h>
> >
> > /* Driver includes */
> > #include "../../host/tcp-offload.h"
> > diff --git a/drivers/nvme/hw/qedn/qedn_main.c b/drivers/nvme/hw/qedn/qedn_main.c
> > index e3e8e3676b79..52007d35622d 100644
> > --- a/drivers/nvme/hw/qedn/qedn_main.c
> > +++ b/drivers/nvme/hw/qedn/qedn_main.c
> > @@ -27,9 +27,47 @@ static int
> > qedn_claim_dev(struct nvme_tcp_ofld_dev *dev,
> > struct nvme_tcp_ofld_ctrl_con_params *conn_params)
> > {
> > - /* Placeholder - qedn_claim_dev */
> > + struct pci_dev *qede_pdev = NULL;
> > + struct net_device *ndev = NULL;
> > + u16 vlan_id = 0;
> > + int rc = 0;
> >
> > - return 0;
> > + /* qedn utilizes host network stack through paired qede device for
> > + * non-offload traffic. First we verify there is valid route to remote
> > + * peer.
> > + */
> > + if (conn_params->remote_ip_addr.ss_family == AF_INET) {
> > + rc = qed_route_ipv4(&conn_params->local_ip_addr,
> > + &conn_params->remote_ip_addr,
> > + &conn_params->remote_mac_addr,
> > + &ndev);
> > + } else if (conn_params->remote_ip_addr.ss_family == AF_INET6) {
> > + rc = qed_route_ipv6(&conn_params->local_ip_addr,
> > + &conn_params->remote_ip_addr,
> > + &conn_params->remote_mac_addr,
> > + &ndev);
> > + } else {
> > + pr_err("address family %d not supported\n",
> > + conn_params->remote_ip_addr.ss_family);
> > +
> > + return false;
> > + }
> > +
> > + if (rc)
> > + return false;
> > +
> > + qed_vlan_get_ndev(&ndev, &vlan_id);
> > + conn_params->vlan_id = vlan_id;
> > +
> > + /* route found through ndev - validate this is qede*/
> > + qede_pdev = qed_validate_ndev(ndev);
> > + if (!qede_pdev)
> > + return false;
> > +
> > + dev->qede_pdev = qede_pdev;
> > + dev->ndev = ndev;
> > +
> > + return true;
> > }
> >
> > static int qedn_create_queue(struct nvme_tcp_ofld_queue *queue, int qid,
> >
> Reviewed-by: Hannes Reinecke <hare@...e.de>
Thanks.
>
> Cheers,
>
> Hannes
> --
> Dr. Hannes Reinecke Kernel Storage Architect
> hare@...e.de +49 911 74053 688
> SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
> HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
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