linux-kernel - Re: [PATCH v4 5/5] net: rnpgbe: Add register

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Message-ID: <933ACEBDA5823549+20250814135926.GC1094497@nic-Precision-5820-Tower>
Date: Thu, 14 Aug 2025 21:59:26 +0800
From: Yibo Dong <dong100@...se.com>
To: MD Danish Anwar <danishanwar@...com>
Cc: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, horms@...nel.org,
	corbet@....net, gur.stavi@...wei.com, maddy@...ux.ibm.com,
	mpe@...erman.id.au, lee@...ger.us, gongfan1@...wei.com,
	lorenzo@...nel.org, geert+renesas@...der.be,
	Parthiban.Veerasooran@...rochip.com, lukas.bulwahn@...hat.com,
	alexanderduyck@...com, richardcochran@...il.com,
	netdev@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 5/5] net: rnpgbe: Add register_netdev

On Thu, Aug 14, 2025 at 05:44:51PM +0530, MD Danish Anwar wrote:
> On 14/08/25 1:08 pm, Dong Yibo wrote:
> > Initialize get mac from hw, register the netdev.
> > 
> > Signed-off-by: Dong Yibo <dong100@...se.com>
> > ---
> >  drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h    | 18 +++++
> >  .../net/ethernet/mucse/rnpgbe/rnpgbe_chip.c   | 73 ++++++++++++++++++
> >  drivers/net/ethernet/mucse/rnpgbe/rnpgbe_hw.h |  1 +
> >  .../net/ethernet/mucse/rnpgbe/rnpgbe_main.c   | 75 +++++++++++++++++++
> >  4 files changed, 167 insertions(+)
> > 
> > diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
> > index 7ab1cbb432f6..7e51a8871b71 100644
> > --- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
> > +++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
> > @@ -6,6 +6,7 @@
> >  
> >  #include <linux/types.h>
> >  #include <linux/mutex.h>
> > +#include <linux/netdevice.h>
> >  
> >  extern const struct rnpgbe_info rnpgbe_n500_info;
> >  extern const struct rnpgbe_info rnpgbe_n210_info;
> > @@ -82,6 +83,15 @@ struct mucse_mbx_info {
> >  	u32 fw2pf_mbox_vec;
> >  };
> >  
> > +struct mucse_hw_operations {
> > +	int (*reset_hw)(struct mucse_hw *hw);
> > +	void (*driver_status)(struct mucse_hw *hw, bool enable, int mode);
> > +};
> > +
> > +enum {
> > +	mucse_driver_insmod,
> > +};
> > +
> >  struct mucse_hw {
> >  	u8 pfvfnum;
> >  	void __iomem *hw_addr;
> > @@ -91,12 +101,17 @@ struct mucse_hw {
> >  	u32 axi_mhz;
> >  	u32 bd_uid;
> >  	enum rnpgbe_hw_type hw_type;
> > +	const struct mucse_hw_operations *ops;
> >  	struct mucse_dma_info dma;
> >  	struct mucse_eth_info eth;
> >  	struct mucse_mac_info mac;
> >  	struct mucse_mbx_info mbx;
> > +	u32 flags;
> > +#define M_FLAGS_INIT_MAC_ADDRESS BIT(0)
> >  	u32 driver_version;
> >  	u16 usecstocount;
> > +	int lane;
> > +	u8 perm_addr[ETH_ALEN];
> >  };
> >  
> >  struct mucse {
> > @@ -117,4 +132,7 @@ struct rnpgbe_info {
> >  #define PCI_DEVICE_ID_N500_DUAL_PORT 0x8318
> >  #define PCI_DEVICE_ID_N210 0x8208
> >  #define PCI_DEVICE_ID_N210L 0x820a
> > +
> > +#define dma_wr32(dma, reg, val) writel((val), (dma)->dma_base_addr + (reg))
> > +#define dma_rd32(dma, reg) readl((dma)->dma_base_addr + (reg))
> 
> These macros could collide with other definitions. Consider prefixing
> them with the driver name (rnpgbe_dma_wr32).
> 
> I don't see these macros getting used anywhere in this series. They
> should be introduced when they are used.
> 

Got it, I will introduce codes when they are used.

> >  #endif /* _RNPGBE_H */
> > diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_chip.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_chip.c
> > index e0c6f47efd4c..aba44b31eae3 100644
> > --- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_chip.c
> > +++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_chip.c
> > @@ -1,11 +1,83 @@
> >  // SPDX-License-Identifier: GPL-2.0
> >  /* Copyright(c) 2020 - 2025 Mucse Corporation. */
> >  
> > +#include <linux/pci.h>
> >  #include <linux/string.h>
> > +#include <linux/etherdevice.h>
> >  
> >  #include "rnpgbe.h"
> >  #include "rnpgbe_hw.h"
> >  #include "rnpgbe_mbx.h"
> > +#include "rnpgbe_mbx_fw.h"
> 
> > +/**
> > + * rnpgbe_xmit_frame - Send a skb to driver
> > + * @skb: skb structure to be sent
> > + * @netdev: network interface device structure
> > + *
> > + * @return: NETDEV_TX_OK or NETDEV_TX_BUSY
> > + **/
> > +static netdev_tx_t rnpgbe_xmit_frame(struct sk_buff *skb,
> > +				     struct net_device *netdev)
> > +{
> > +		dev_kfree_skb_any(skb);
> > +		netdev->stats.tx_dropped++;
> > +		return NETDEV_TX_OK;
> > +}
> 
> You didn't fix this extra indentation. This was present in v3 as well
> 
> https://lore.kernel.org/all/94eeae65-0e4b-45ef-a9c0-6bc8d37ae789@ti.com/#:~:text=skb)%3B%0A%3E%20%2B%09%09return%20NETDEV_TX_OK%3B%0A%3E%20%2B-,%7D,-Extra%20indentation%20on
> 

Sorry, I missed fix this, I will fix it in the next version.

> > +
> > +static const struct net_device_ops rnpgbe_netdev_ops = {
> > +	.ndo_open = rnpgbe_open,
> > +	.ndo_stop = rnpgbe_close,
> 
> 
> -- 
> Thanks and Regards,
> Danish
> 
> 

Thanks for your feedback