netdev - Re: [PATCH net-next v8 2/6] net: libwx: Add sriov api for wangxun nics

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Message-ID: <20250317170832.GG688833@kernel.org>
Date: Mon, 17 Mar 2025 17:08:32 +0000
From: Simon Horman <horms@...nel.org>
To: "mengyuanlou@...-swift.com" <mengyuanlou@...-swift.com>
Cc: netdev@...r.kernel.org, kuba@...nel.org, jiawenwu@...stnetic.com,
	duanqiangwen@...-swift.com
Subject: Re: [PATCH net-next v8 2/6] net: libwx: Add sriov api for wangxun
 nics

On Mon, Mar 17, 2025 at 02:34:40PM +0800, mengyuanlou@...-swift.com wrote:
> 
> 
> > 2025年3月16日 21:22，Simon Horman <horms@...nel.org> 写道：
> > 
> > On Sun, Mar 09, 2025 at 11:42:48PM +0800, Mengyuan Lou wrote:
> >> Implement sriov_configure interface for wangxun nics in libwx.
> >> Enable VT mode and initialize vf control structure, when sriov
> >> is enabled. Do not be allowed to disable sriov when vfs are
> >> assigned.
> >> 
> >> Signed-off-by: Mengyuan Lou <mengyuanlou@...-swift.com>
> > 
> > ...
> > 
> >> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_sriov.c b/drivers/net/ethernet/wangxun/libwx/wx_sriov.c
> >> new file mode 100644
> >> index 000000000000..2392df341ad1
> >> --- /dev/null
> >> +++ b/drivers/net/ethernet/wangxun/libwx/wx_sriov.c
> >> @@ -0,0 +1,201 @@
> >> +// SPDX-License-Identifier: GPL-2.0
> >> +/* Copyright (c) 2015 - 2025 Beijing WangXun Technology Co., Ltd. */
> >> +
> >> +#include <linux/etherdevice.h>
> >> +#include <linux/pci.h>
> >> +
> >> +#include "wx_type.h"
> >> +#include "wx_mbx.h"
> >> +#include "wx_sriov.h"
> >> +
> >> +static void wx_vf_configuration(struct pci_dev *pdev, int event_mask)
> >> +{
> >> + unsigned int vfn = (event_mask & GENMASK(5, 0));
> >> + struct wx *wx = pci_get_drvdata(pdev);
> >> +
> >> + bool enable = ((event_mask & BIT(31)) != 0);
> > 
> > Sorry to nit-pick, and I'd be happy for this to be addressed as a
> > follow-up, but I think that it would be nice to:
> > 
> > 1. Both use some #defines and FIELD_GET() for the masking above.
> > 
> > 2. Use !! in place of != 0
> 
> #define VF_ENABLE_CHECK(_m) FIELD_GET(BIT(31), (_m))
> 
> bool enable = !!VF_ENABLE_CHECK(event_mask);
> 
> Is that the way to do it?

Thanks, I think that would work.

> 
> 
> > 
> > 3. Arrange local variable declarations in reverse xmas tree order.
> > 
> 
> 
> 
> >> +
> >> + if (enable)
> >> + eth_zero_addr(wx->vfinfo[vfn].vf_mac_addr);
> >> +}
> > 
> > ...
> > 
> > 
>