Re: [RFC Patch net-next v1 1/9] r8169: add some register definitions

[Heiner Kallweit <hkallweit1@gmail.com>]

On 20.04.2026 04:19, javen wrote:
> From: Javen Xu <javen_xu@realsil.com.cn>
> 
> To support rss, this patch adds some macro definitions and register
> definitions.
> 
> Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
> ---
>  drivers/net/ethernet/realtek/r8169_main.c | 75 +++++++++++++++++++++++
>  1 file changed, 75 insertions(+)
> 
> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
> index 791277e750ba..0fbec27e4a0d 100644
> --- a/drivers/net/ethernet/realtek/r8169_main.c
> +++ b/drivers/net/ethernet/realtek/r8169_main.c
> @@ -77,6 +77,23 @@
>  #define R8169_RX_RING_BYTES	(NUM_RX_DESC * sizeof(struct RxDesc))
>  #define R8169_TX_STOP_THRS	(MAX_SKB_FRAGS + 1)
>  #define R8169_TX_START_THRS	(2 * R8169_TX_STOP_THRS)
> +#define R8169_MAX_RX_QUEUES	8
> +#define R8169_MAX_TX_QUEUES	1
> +#define R8169_MAX_MSIX_VEC	32
> +#define R8127_MAX_TX_QUEUES	1

Then why multi tx queue support?

> +#define R8127_MAX_RX_QUEUES	8
> +#define R8127_MAX_IRQ		32
> +#define R8127_MIN_IRQ		30

This isn't self-explanatory. What do min and max refer to here?

> +#define RTL8127_RSS_KEY_SIZE	40
> +#define RSS_CPU_NUM_OFFSET	16
> +#define RSS_MASK_BITS_OFFSET	8
> +#define RTL8127_MAX_INDIRECTION_TABLE_ENTRIES 128
> +#define RXS_8125B_RSS_UDP_V4 BIT(27)
> +#define RXS_8125_RSS_IPV4_V4 BIT(28)
> +#define RXS_8125_RSS_IPV6_V4 BIT(29)
> +#define RXS_8125_RSS_TCP_V4 BIT(30)
> +#define RTL8127_RXS_RSS_L3_TYPE_MASK_V4 (RXS_8125_RSS_IPV4_V4 | RXS_8125_RSS_IPV6_V4)
> +#define RTL8127_RXS_RSS_L4_TYPE_MASK_V4 (RXS_8125_RSS_TCP_V4 | RXS_8125B_RSS_UDP_V4)
>  
>  #define OCP_STD_PHY_BASE	0xa400
>  
> @@ -435,6 +452,8 @@ enum rtl8125_registers {
>  #define INT_CFG0_CLKREQEN		BIT(3)
>  	IntrMask_8125		= 0x38,
>  	IntrStatus_8125		= 0x3c,
> +	IntrMask1_8125		= 0x800,
> +	IntrStatus1_8125	= 0x802,
>  	INT_CFG1_8125		= 0x7a,
>  	LEDSEL2			= 0x84,
>  	LEDSEL1			= 0x86,
> @@ -444,6 +463,36 @@ enum rtl8125_registers {
>  	RSS_CTRL_8125		= 0x4500,
>  	Q_NUM_CTRL_8125		= 0x4800,
>  	EEE_TXIDLE_TIMER_8125	= 0x6048,
> +	TNPDS_Q1_LOW		= 0x2100,
> +	RDSAR_Q1_LOW		= 0x4000,
> +	IMR_V2_SET_REG_8125	= 0x0d0c,
> +	IMR_V2_CLEAR_REG_8125	= 0x0d00,
> +	IMR_V4_L2_CLEAR_REG_8125 = 0x0d10,
> +	ISR_V2_8125		= 0x0d04,
> +	ISR_V4_L2_8125		= 0x0d14,
> +};
> +
> +enum rtl8127_msix_id {
> +	MSIX_ID_V4_LINKCHG	= 29,
> +};
> +
> +enum rtl8127_rss_register_content {
> +	RSS_CTRL_TCP_IPV4_SUPP		= (1 << 0),
> +	RSS_CTRL_IPV4_SUPP		= (1 << 1),
> +	RSS_CTRL_TCP_IPV6_SUPP		= (1 << 2),
> +	RSS_CTRL_IPV6_SUPP		= (1 << 3),
> +	RSS_CTRL_IPV6_EXT_SUPP		= (1 << 4),
> +	RSS_CTRL_TCP_IPV6_EXT_SUPP	= (1 << 5),
> +	RSS_CTRL_UDP_IPV4_SUPP		= (1 << 11),
> +	RSS_CTRL_UDP_IPV6_SUPP		= (1 << 12),
> +	RSS_CTRL_UDP_IPV6_EXT_SUPP	= (1 << 13),
> +	RSS_INDIRECTION_TBL_8125_V2	= 0x4700,
> +	RSS_KEY_8125			= 0x4600,
> +};
> +
> +enum rtl8127_rss_flag {
> +	RTL_8125_RSS_FLAG_HASH_UDP_IPV4  = (1 << 0),
> +	RTL_8125_RSS_FLAG_HASH_UDP_IPV6  = (1 << 1),
>  };
>  
>  #define LEDSEL_MASK_8125	0x23f
> @@ -474,6 +523,10 @@ enum rtl_register_content {
>  	RxRUNT	= (1 << 20),
>  	RxCRC	= (1 << 19),
>  
> +	RxRES_RSS	= (1 << 22),
> +	RxRUNT_RSS	= (1 << 21),
> +	RxCRC_RSS	= (1 << 20),
> +
>  	/* ChipCmdBits */
>  	StopReq		= 0x80,
>  	CmdReset	= 0x10,
> @@ -576,6 +629,9 @@ enum rtl_register_content {
>  
>  	/* magic enable v2 */
>  	MagicPacket_v2	= (1 << 16),	/* Wake up when receives a Magic Packet */
> +	ISRIMR_V6_LINKCHG	= (1 << 29),
> +	ISRIMR_V6_TOK_Q0	= (1 << 8),
> +	ISRIMR_V6_ROK_Q0	= (1 << 0),
>  };
>  
>  enum rtl_desc_bit {
> @@ -633,6 +689,11 @@ enum rtl_rx_desc_bit {
>  #define RxProtoIP	(PID1 | PID0)
>  #define RxProtoMask	RxProtoIP
>  
> +	RxUDPT_v4	= (1 << 19),
> +	RxTCPT_v4	= (1 << 18),
> +	RxUDPF_v4	= (1 << 16), /* UDP/IP checksum failed */
> +	RxTCPF_v4	= (1 << 15), /* TCP/IP checksum failed */
> +
>  	IPFail		= (1 << 16), /* IP checksum failed */
>  	UDPFail		= (1 << 15), /* UDP/IP checksum failed */
>  	TCPFail		= (1 << 14), /* TCP/IP checksum failed */
> @@ -659,6 +720,11 @@ struct RxDesc {
>  	__le64 addr;
>  };
>  
> +enum features {
> +	RTL_FEATURE_MSI		= (1 << 1),
> +	RTL_FEATURE_MSIX	= (1 << 2),
> +};
> +
>  struct ring_info {
>  	struct sk_buff	*skb;
>  	u32		len;
> @@ -728,6 +794,13 @@ enum rtl_dash_type {
>  	RTL_DASH_25_BP,
>  };
>  
> +enum rx_desc_ring_type {
> +	RX_DESC_RING_TYPE_UNKNOWN = 0,
> +	RX_DESC_RING_TYPE_DEAFULT,
> +	RX_DESC_RING_TYPE_RSS,
> +	RX_DESC_RING_TYPE_MAX
> +};
> +
>  struct rtl8169_private {
>  	void __iomem *mmio_addr;	/* memory map physical address */
>  	struct pci_dev *pci_dev;
> @@ -763,6 +836,8 @@ struct rtl8169_private {
>  	unsigned aspm_manageable:1;
>  	unsigned dash_enabled:1;
>  	bool sfp_mode:1;
> +	bool rss_support:1;
> +	bool rss_enable:1;
>  	dma_addr_t counters_phys_addr;
>  	struct rtl8169_counters *counters;
>  	struct rtl8169_tc_offsets tc_offset;