Subject: Re: [PATCH net-next v1 12/18] net/amazon: Ensure that driver version is aligned to the linux kernel

From: Leon Romanovsky <[email-masked]>
Date: Mon, 24 Feb 2020 11:41:16 +0200

On Mon, Feb 24, 2020 at 09:03:14AM +0000, Kiyanovski, Arthur wrote:
>
>
> > -----Original Message-----
> > From: Leon Romanovsky <[email-masked]>
> > Sent: Monday, February 24, 2020 10:53 AM
> > To: David S. Miller <[email-masked]>; Jakub Kicinski <[email-masked]>
> > Cc: Leon Romanovsky <[email-masked]>; Tom Lendacky
> > <[email-masked]>; Keyur Chudgar
> > <[email-masked]>; Don Fry <[email-masked]>;
> > Veaceslav Falico <[email-masked]>; Jay Vosburgh <[email-masked]>;
> > [email-masked]; Maxime Ripard <[email-masked]>; Heiko Stuebner
> > <[email-masked]>; Mark Einon <[email-masked]>; Chris Snook
> > <[email-masked]>; [email-masked]; Iyappan
> > Subramanian <[email-masked]>; Igor Russkikh
> > <[email-masked]>; David Dillow <[email-masked]>; Belgazal,
> > Netanel <[email-masked]>; Quan Nguyen
> > <[email-masked]>; Jay Cliburn <[email-masked]>; Lino
> > Sanfilippo <[email-masked]>; [email-masked];
> > Andreas Larsson <[email-masked]>; Andy Gospodarek
> > <[email-masked]>; [email-masked]; Thor Thayer
> > <[email-masked]>; [email-masked]; Ion Badulescu
> > <[email-masked]>; Kiyanovski, Arthur <[email-masked]>; Jes Sorensen
> > <[email-masked]>; [email-masked]; Chen-Yu Tsai
> > <[email-masked]>
> > Subject: [PATCH net-next v1 12/18] net/amazon: Ensure that driver version is
> > aligned to the linux kernel
> >
> > From: Leon Romanovsky <[email-masked]>
> >
> > Upstream drivers are managed inside global repository and released all
> > together, this ensure that driver version is the same as linux kernel, so update
> > amazon drivers to properly reflect it.
> >
> > Signed-off-by: Leon Romanovsky <[email-masked]>
> > ---
> >  drivers/net/ethernet/amazon/ena/ena_ethtool.c |  1 -
> > drivers/net/ethernet/amazon/ena/ena_netdev.c  | 17 ++---------------
> > drivers/net/ethernet/amazon/ena/ena_netdev.h  | 11 -----------
> >  3 files changed, 2 insertions(+), 27 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
> > b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
> > index ced1d577b62a..19262f37db84 100644
> > --- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
> > +++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
> > @@ -404,7 +404,6 @@ static void ena_get_drvinfo(struct net_device *dev,
> >  	struct ena_adapter *adapter = netdev_priv(dev);
> >
> >  	strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
> > -	strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
> >  	strlcpy(info->bus_info, pci_name(adapter->pdev),
> >  		sizeof(info->bus_info));
> >  }
> > diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> > b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> > index 0b2fd96b93d7..4faf81c456d8 100644
> > --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> > +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> > @@ -49,12 +49,9 @@
> >  #include <linux/bpf_trace.h>
> >  #include "ena_pci_id_tbl.h"
> >
> > -static char version[] = DEVICE_NAME " v" DRV_MODULE_VERSION "\n";
> > -
> >  MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
> > MODULE_DESCRIPTION(DEVICE_NAME);  MODULE_LICENSE("GPL"); -
> > MODULE_VERSION(DRV_MODULE_VERSION);
> >
> >  /* Time in jiffies before concluding the transmitter is hung. */  #define
> > TX_TIMEOUT  (5 * HZ) @@ -3093,11 +3090,7 @@ static void
> > ena_config_host_info(struct ena_com_dev *ena_dev,
> >  	host_info->os_dist = 0;
> >  	strncpy(host_info->os_dist_str, utsname()->release,
> >  		sizeof(host_info->os_dist_str) - 1);
> > -	host_info->driver_version =
> > -		(DRV_MODULE_VER_MAJOR) |
> > -		(DRV_MODULE_VER_MINOR <<
> > ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
> > -		(DRV_MODULE_VER_SUBMINOR <<
> > ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT) |
> > -		("K"[0] << ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT);
> > +	host_info->driver_version = LINUX_VERSION_CODE;
> >  	host_info->num_cpus = num_online_cpus();
> >
> >  	host_info->driver_supported_features = @@ -3476,9 +3469,7 @@
> > static int ena_restore_device(struct ena_adapter *adapter)
> >  		netif_carrier_on(adapter->netdev);
> >
> >  	mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
> > -	dev_err(&pdev->dev,
> > -		"Device reset completed successfully, Driver info: %s\n",
> > -		version);
> > +	dev_err(&pdev->dev, "Device reset completed successfully\n");
> >
> >  	return rc;
> >  err_disable_msix:
> > @@ -4116,8 +4107,6 @@ static int ena_probe(struct pci_dev *pdev, const
> > struct pci_device_id *ent)
> >
> >  	dev_dbg(&pdev->dev, "%s\n", __func__);
> >
> > -	dev_info_once(&pdev->dev, "%s", version);
> > -
> >  	rc = pci_enable_device_mem(pdev);
> >  	if (rc) {
> >  		dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
> > @@ -4429,8 +4418,6 @@ static struct pci_driver ena_pci_driver = {
> >
> >  static int __init ena_init(void)
> >  {
> > -	pr_info("%s", version);
> > -
> >  	ena_wq = create_singlethread_workqueue(DRV_MODULE_NAME);
> >  	if (!ena_wq) {
> >  		pr_err("Failed to create workqueue\n"); diff --git
> > a/drivers/net/ethernet/amazon/ena/ena_netdev.h
> > b/drivers/net/ethernet/amazon/ena/ena_netdev.h
> > index 8795e0b1dc3c..74c7f10b60dd 100644
> > --- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
> > +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
> > @@ -45,18 +45,7 @@
> >  #include "ena_com.h"
> >  #include "ena_eth_com.h"
> >
> > -#define DRV_MODULE_VER_MAJOR	2
> > -#define DRV_MODULE_VER_MINOR	1
> > -#define DRV_MODULE_VER_SUBMINOR 0
> > -
> >  #define DRV_MODULE_NAME		"ena"
> > -#ifndef DRV_MODULE_VERSION
> > -#define DRV_MODULE_VERSION \
> > -	__stringify(DRV_MODULE_VER_MAJOR) "."	\
> > -	__stringify(DRV_MODULE_VER_MINOR) "."	\
> > -	__stringify(DRV_MODULE_VER_SUBMINOR) "K"
> > -#endif
> > -
> >  #define DEVICE_NAME	"Elastic Network Adapter (ENA)"
> >
> >  /* 1 for AENQ + ADMIN */
> > --
> > 2.24.1
>
> Hi Leon, David,
>
> This patch is not good for the ENA driver as it breaks the interface with the FW of the ENA device in ena_config_host_info(), host_info is later reported to the FW.
> Please do not merge it yet.

As I wrote here [1], I tried to avoid any changes in SW<->FW interfaces.
Can you please show me the dump stack of how is such info forwarded to FW?
How do you distinguish between different distro versions and driver
releases?

> We are now working on altering your patch so that it won't break this interface and will send it to you in the next few hours.

It is good, thanks.

[1] https://lore.kernel.org/netdev/20200223091031.GA422704@unreal

> Thanks,
> Arthur

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