linux_kernel/drivers/net/ethernet/intel/igc/igc_base.h

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c)  2018 Intel Corporation */

#ifndef _IGC_BASE_H
#define _IGC_BASE_H

/* forward declaration */
void igc_rx_fifo_flush_base(struct igc_hw *hw);

/* Transmit Descriptor - Advanced */
union igc_adv_tx_desc {
	struct {
		__le64 buffer_addr;    /* Address of descriptor's data buf */
		__le32 cmd_type_len;
		__le32 olinfo_status;
	} read;
	struct {
		__le64 rsvd;       /* Reserved */
		__le32 nxtseq_seed;
		__le32 status;
	} wb;
};

struct igc_adv_data_desc {
	__le64 buffer_addr;    /* Address of the descriptor's data buffer */
	union {
		u32 data;
		struct {
			u32 datalen:16; /* Data buffer length */
			u32 rsvd:4;
			u32 dtyp:4;  /* Descriptor type */
			u32 dcmd:8;  /* Descriptor command */
		} config;
	} lower;
	union {
		u32 data;
		struct {
			u32 status:4;  /* Descriptor status */
			u32 idx:4;
			u32 popts:6;  /* Packet Options */
			u32 paylen:18; /* Payload length */
		} options;
	} upper;
};

/* Receive Descriptor - Advanced */
union igc_adv_rx_desc {
	struct {
		__le64 pkt_addr; /* Packet buffer address */
		__le64 hdr_addr; /* Header buffer address */
	} read;
	struct {
		struct {
			union {
				__le32 data;
				struct {
					__le16 pkt_info; /*RSS type, Pkt type*/
					/* Split Header, header buffer len */
					__le16 hdr_info;
				} hs_rss;
			} lo_dword;
			union {
				__le32 rss; /* RSS Hash */
				struct {
					__le16 ip_id; /* IP id */
					__le16 csum; /* Packet Checksum */
				} csum_ip;
			} hi_dword;
		} lower;
		struct {
			__le32 status_error; /* ext status/error */
			__le16 length; /* Packet length */
			__le16 vlan; /* VLAN tag */
		} upper;
	} wb;  /* writeback */
};

/* Additional Transmit Descriptor Control definitions */
#define IGC_TXDCTL_QUEUE_ENABLE	0x02000000 /* Ena specific Tx Queue */

/* Additional Receive Descriptor Control definitions */
#define IGC_RXDCTL_QUEUE_ENABLE	0x02000000 /* Ena specific Rx Queue */

/* SRRCTL bit definitions */
#define IGC_SRRCTL_BSIZEPKT_SHIFT		10 /* Shift _right_ */
#define IGC_SRRCTL_BSIZEHDRSIZE_SHIFT		2  /* Shift _left_ */
#define IGC_SRRCTL_DESCTYPE_ADV_ONEBUF	0x02000000

#endif /* _IGC_BASE_H */