netdev - [PATCH net-next v2] nfp: initialize netdev's dev

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Message-Id: <20230405120829.28817-1-louis.peens@corigine.com>
Date:   Wed,  5 Apr 2023 14:08:29 +0200
From:   Louis Peens <louis.peens@...igine.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Leon Romanovsky <leonro@...dia.com>,
        Simon Horman <simon.horman@...igine.com>,
        netdev@...r.kernel.org, oss-drivers@...igine.com
Subject: [PATCH net-next v2] nfp: initialize netdev's dev_port with correct id

From: Yinjun Zhang <yinjun.zhang@...igine.com>

`dev_port` is used to differentiate devices that instantiate from
the same function, which is the case in most of NFP NICs.

In some customized scenario, `dev_port` is used to rename netdev
instead of `phys_port_name`. Example rules using `dev_port`:

  SUBSYSTEM=="net", ACTION=="add", KERNELS=="0000:e1:00.0", ATTR{dev_port}=="0", NAME:="ens8np0"
  SUBSYSTEM=="net", ACTION=="add", KERNELS=="0000:e1:00.0", ATTR{dev_port}=="1", NAME:="ens8np1"

To take port split case into account, here we initialize `dev_port`
according to the port sequence in eth_table from management firmware
instead of using port label id directly. And management firmware
makes sure that port sequence matches its label id.

Signed-off-by: Yinjun Zhang <yinjun.zhang@...igine.com>
Acked-by: Simon Horman <simon.horman@...igine.com>
Signed-off-by: Louis Peens <louis.peens@...igine.com>
---
This is a resubmission of a patch which was previously part of a series in
[1]. Since the second patch in that series was rejected this is now a
single patch, and is therefore submitted as such.

Changes since V1 related to this patch:
- Updated the commit message to better explain the origin of the number which
  gets populated.

[1] https://lore.kernel.org/netdev/20230329144548.66708-1-louis.peens@corigine.com/T/

 drivers/net/ethernet/netronome/nfp/nfp_port.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_port.c b/drivers/net/ethernet/netronome/nfp/nfp_port.c
index 4f2308570dcf..54640bcb70fb 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_port.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_port.c
@@ -189,6 +189,7 @@ int nfp_port_init_phy_port(struct nfp_pf *pf, struct nfp_app *app,
 
 	port->eth_port = &pf->eth_tbl->ports[id];
 	port->eth_id = pf->eth_tbl->ports[id].index;
+	port->netdev->dev_port = id;
 	if (pf->mac_stats_mem)
 		port->eth_stats =
 			pf->mac_stats_mem + port->eth_id * NFP_MAC_STATS_SIZE;
-- 
2.34.1