/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ /* * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
*/ #ifndef _ENA_ETH_IO_H_ #define _ENA_ETH_IO_H_
struct ena_eth_io_tx_desc { /* 15:0 : length - Buffer length in bytes, must * include any packet trailers that the ENA supposed * to update like End-to-End CRC, Authentication GMAC * etc. This length must not include the * 'Push_Buffer' length. This length must not include * the 4-byte added in the end for 802.3 Ethernet FCS * 21:16 : req_id_hi - Request ID[15:10] * 22 : reserved22 - MBZ * 23 : meta_desc - MBZ * 24 : phase * 25 : reserved1 - MBZ * 26 : first - Indicates first descriptor in * transaction * 27 : last - Indicates last descriptor in * transaction * 28 : comp_req - Indicates whether completion * should be posted, after packet is transmitted. * Valid only for first descriptor * 30:29 : reserved29 - MBZ * 31 : reserved31 - MBZ
*/
u32 len_ctrl;
/* 3:0 : l3_proto_idx - L3 protocol. This field * required when l3_csum_en,l3_csum or tso_en are set. * 4 : DF - IPv4 DF, must be 0 if packet is IPv4 and * DF flags of the IPv4 header is 0. Otherwise must * be set to 1 * 6:5 : reserved5 * 7 : tso_en - Enable TSO, For TCP only. * 12:8 : l4_proto_idx - L4 protocol. This field need * to be set when l4_csum_en or tso_en are set. * 13 : l3_csum_en - enable IPv4 header checksum. * 14 : l4_csum_en - enable TCP/UDP checksum. * 15 : ethernet_fcs_dis - when set, the controller * will not append the 802.3 Ethernet Frame Check * Sequence to the packet * 16 : reserved16 * 17 : l4_csum_partial - L4 partial checksum. when * set to 0, the ENA calculates the L4 checksum, * where the Destination Address required for the * TCP/UDP pseudo-header is taken from the actual * packet L3 header. when set to 1, the ENA doesn't * calculate the sum of the pseudo-header, instead, * the checksum field of the L4 is used instead. When * TSO enabled, the checksum of the pseudo-header * must not include the tcp length field. L4 partial * checksum should be used for IPv6 packet that * contains Routing Headers. * 20:18 : reserved18 - MBZ * 21 : reserved21 - MBZ * 31:22 : req_id_lo - Request ID[9:0]
*/
u32 meta_ctrl;
u32 buff_addr_lo;
/* address high and header size * 15:0 : addr_hi - Buffer Pointer[47:32] * 23:16 : reserved16_w2 * 31:24 : header_length - Header length. For Low * Latency Queues, this fields indicates the number * of bytes written to the headers' memory. For * normal queues, if packet is TCP or UDP, and longer * than max_header_size, then this field should be * set to the sum of L4 header offset and L4 header * size(without options), otherwise, this field * should be set to 0. For both modes, this field * must not exceed the max_header_size. * max_header_size value is reported by the Max * Queues Feature descriptor
*/
u32 buff_addr_hi_hdr_sz;
};
struct ena_eth_io_tx_meta_desc { /* 9:0 : req_id_lo - Request ID[9:0] * 11:10 : reserved10 - MBZ * 12 : reserved12 - MBZ * 13 : reserved13 - MBZ * 14 : ext_valid - if set, offset fields in Word2 * are valid Also MSS High in Word 0 and bits [31:24] * in Word 3 * 15 : reserved15 * 19:16 : mss_hi * 20 : eth_meta_type - 0: Tx Metadata Descriptor, 1: * Extended Metadata Descriptor * 21 : meta_store - Store extended metadata in queue * cache * 22 : reserved22 - MBZ * 23 : meta_desc - MBO * 24 : phase * 25 : reserved25 - MBZ * 26 : first - Indicates first descriptor in * transaction * 27 : last - Indicates last descriptor in * transaction * 28 : comp_req - Indicates whether completion * should be posted, after packet is transmitted. * Valid only for first descriptor * 30:29 : reserved29 - MBZ * 31 : reserved31 - MBZ
*/
u32 len_ctrl;
/* 7:0 : l3_hdr_len * 15:8 : l3_hdr_off * 21:16 : l4_hdr_len_in_words - counts the L4 header * length in words. there is an explicit assumption * that L4 header appears right after L3 header and * L4 offset is based on l3_hdr_off+l3_hdr_len * 31:22 : mss_lo
*/
u32 word2;
struct ena_eth_io_rx_desc { /* In bytes. 0 means 64KB */
u16 length;
/* MBZ */
u8 reserved2;
/* 0 : phase * 1 : reserved1 - MBZ * 2 : first - Indicates first descriptor in * transaction * 3 : last - Indicates last descriptor in transaction * 4 : comp_req * 5 : reserved5 - MBO * 7:6 : reserved6 - MBZ
*/
u8 ctrl;
u16 req_id;
/* MBZ */
u16 reserved6;
u32 buff_addr_lo;
u16 buff_addr_hi;
/* MBZ */
u16 reserved16_w3;
};
/* 4-word format Note: all ethernet parsing information are valid only when * last=1
*/ struct ena_eth_io_rx_cdesc_base { /* 4:0 : l3_proto_idx * 6:5 : src_vlan_cnt * 7 : reserved7 - MBZ * 12:8 : l4_proto_idx * 13 : l3_csum_err - when set, either the L3 * checksum error detected, or, the controller didn't * validate the checksum. This bit is valid only when * l3_proto_idx indicates IPv4 packet * 14 : l4_csum_err - when set, either the L4 * checksum error detected, or, the controller didn't * validate the checksum. This bit is valid only when * l4_proto_idx indicates TCP/UDP packet, and, * ipv4_frag is not set. This bit is valid only when * l4_csum_checked below is set. * 15 : ipv4_frag - Indicates IPv4 fragmented packet * 16 : l4_csum_checked - L4 checksum was verified * (could be OK or error), when cleared the status of * checksum is unknown * 23:17 : reserved17 - MBZ * 24 : phase * 25 : l3_csum2 - second checksum engine result * 26 : first - Indicates first descriptor in * transaction * 27 : last - Indicates last descriptor in * transaction * 29:28 : reserved28 * 30 : buffer - 0: Metadata descriptor. 1: Buffer * Descriptor was used * 31 : reserved31
*/
u32 status;
u16 length;
u16 req_id;
/* 32-bit hash result */
u32 hash;
u16 sub_qid;
u8 offset;
u8 reserved;
};
/* 8-word format */ struct ena_eth_io_rx_cdesc_ext { struct ena_eth_io_rx_cdesc_base base;
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