From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/infiniband/core/ud_header.c | 547 ++++++++++++++++++++++++++++++++++++ 1 file changed, 547 insertions(+) create mode 100644 drivers/infiniband/core/ud_header.c (limited to 'drivers/infiniband/core/ud_header.c') diff --git a/drivers/infiniband/core/ud_header.c b/drivers/infiniband/core/ud_header.c new file mode 100644 index 000000000..64d9c492d --- /dev/null +++ b/drivers/infiniband/core/ud_header.c @@ -0,0 +1,547 @@ +/* + * Copyright (c) 2004 Topspin Corporation. All rights reserved. + * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include +#include +#include +#include +#include + +#include + +#define STRUCT_FIELD(header, field) \ + .struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \ + .struct_size_bytes = sizeof_field(struct ib_unpacked_ ## header, field), \ + .field_name = #header ":" #field + +static const struct ib_field lrh_table[] = { + { STRUCT_FIELD(lrh, virtual_lane), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 4 }, + { STRUCT_FIELD(lrh, link_version), + .offset_words = 0, + .offset_bits = 4, + .size_bits = 4 }, + { STRUCT_FIELD(lrh, service_level), + .offset_words = 0, + .offset_bits = 8, + .size_bits = 4 }, + { RESERVED, + .offset_words = 0, + .offset_bits = 12, + .size_bits = 2 }, + { STRUCT_FIELD(lrh, link_next_header), + .offset_words = 0, + .offset_bits = 14, + .size_bits = 2 }, + { STRUCT_FIELD(lrh, destination_lid), + .offset_words = 0, + .offset_bits = 16, + .size_bits = 16 }, + { RESERVED, + .offset_words = 1, + .offset_bits = 0, + .size_bits = 5 }, + { STRUCT_FIELD(lrh, packet_length), + .offset_words = 1, + .offset_bits = 5, + .size_bits = 11 }, + { STRUCT_FIELD(lrh, source_lid), + .offset_words = 1, + .offset_bits = 16, + .size_bits = 16 } +}; + +static const struct ib_field eth_table[] = { + { STRUCT_FIELD(eth, dmac_h), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 32 }, + { STRUCT_FIELD(eth, dmac_l), + .offset_words = 1, + .offset_bits = 0, + .size_bits = 16 }, + { STRUCT_FIELD(eth, smac_h), + .offset_words = 1, + .offset_bits = 16, + .size_bits = 16 }, + { STRUCT_FIELD(eth, smac_l), + .offset_words = 2, + .offset_bits = 0, + .size_bits = 32 }, + { STRUCT_FIELD(eth, type), + .offset_words = 3, + .offset_bits = 0, + .size_bits = 16 } +}; + +static const struct ib_field vlan_table[] = { + { STRUCT_FIELD(vlan, tag), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 16 }, + { STRUCT_FIELD(vlan, type), + .offset_words = 0, + .offset_bits = 16, + .size_bits = 16 } +}; + +static const struct ib_field ip4_table[] = { + { STRUCT_FIELD(ip4, ver), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 4 }, + { STRUCT_FIELD(ip4, hdr_len), + .offset_words = 0, + .offset_bits = 4, + .size_bits = 4 }, + { STRUCT_FIELD(ip4, tos), + .offset_words = 0, + .offset_bits = 8, + .size_bits = 8 }, + { STRUCT_FIELD(ip4, tot_len), + .offset_words = 0, + .offset_bits = 16, + .size_bits = 16 }, + { STRUCT_FIELD(ip4, id), + .offset_words = 1, + .offset_bits = 0, + .size_bits = 16 }, + { STRUCT_FIELD(ip4, frag_off), + .offset_words = 1, + .offset_bits = 16, + .size_bits = 16 }, + { STRUCT_FIELD(ip4, ttl), + .offset_words = 2, + .offset_bits = 0, + .size_bits = 8 }, + { STRUCT_FIELD(ip4, protocol), + .offset_words = 2, + .offset_bits = 8, + .size_bits = 8 }, + { STRUCT_FIELD(ip4, check), + .offset_words = 2, + .offset_bits = 16, + .size_bits = 16 }, + { STRUCT_FIELD(ip4, saddr), + .offset_words = 3, + .offset_bits = 0, + .size_bits = 32 }, + { STRUCT_FIELD(ip4, daddr), + .offset_words = 4, + .offset_bits = 0, + .size_bits = 32 } +}; + +static const struct ib_field udp_table[] = { + { STRUCT_FIELD(udp, sport), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 16 }, + { STRUCT_FIELD(udp, dport), + .offset_words = 0, + .offset_bits = 16, + .size_bits = 16 }, + { STRUCT_FIELD(udp, length), + .offset_words = 1, + .offset_bits = 0, + .size_bits = 16 }, + { STRUCT_FIELD(udp, csum), + .offset_words = 1, + .offset_bits = 16, + .size_bits = 16 } +}; + +static const struct ib_field grh_table[] = { + { STRUCT_FIELD(grh, ip_version), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 4 }, + { STRUCT_FIELD(grh, traffic_class), + .offset_words = 0, + .offset_bits = 4, + .size_bits = 8 }, + { STRUCT_FIELD(grh, flow_label), + .offset_words = 0, + .offset_bits = 12, + .size_bits = 20 }, + { STRUCT_FIELD(grh, payload_length), + .offset_words = 1, + .offset_bits = 0, + .size_bits = 16 }, + { STRUCT_FIELD(grh, next_header), + .offset_words = 1, + .offset_bits = 16, + .size_bits = 8 }, + { STRUCT_FIELD(grh, hop_limit), + .offset_words = 1, + .offset_bits = 24, + .size_bits = 8 }, + { STRUCT_FIELD(grh, source_gid), + .offset_words = 2, + .offset_bits = 0, + .size_bits = 128 }, + { STRUCT_FIELD(grh, destination_gid), + .offset_words = 6, + .offset_bits = 0, + .size_bits = 128 } +}; + +static const struct ib_field bth_table[] = { + { STRUCT_FIELD(bth, opcode), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 8 }, + { STRUCT_FIELD(bth, solicited_event), + .offset_words = 0, + .offset_bits = 8, + .size_bits = 1 }, + { STRUCT_FIELD(bth, mig_req), + .offset_words = 0, + .offset_bits = 9, + .size_bits = 1 }, + { STRUCT_FIELD(bth, pad_count), + .offset_words = 0, + .offset_bits = 10, + .size_bits = 2 }, + { STRUCT_FIELD(bth, transport_header_version), + .offset_words = 0, + .offset_bits = 12, + .size_bits = 4 }, + { STRUCT_FIELD(bth, pkey), + .offset_words = 0, + .offset_bits = 16, + .size_bits = 16 }, + { RESERVED, + .offset_words = 1, + .offset_bits = 0, + .size_bits = 8 }, + { STRUCT_FIELD(bth, destination_qpn), + .offset_words = 1, + .offset_bits = 8, + .size_bits = 24 }, + { STRUCT_FIELD(bth, ack_req), + .offset_words = 2, + .offset_bits = 0, + .size_bits = 1 }, + { RESERVED, + .offset_words = 2, + .offset_bits = 1, + .size_bits = 7 }, + { STRUCT_FIELD(bth, psn), + .offset_words = 2, + .offset_bits = 8, + .size_bits = 24 } +}; + +static const struct ib_field deth_table[] = { + { STRUCT_FIELD(deth, qkey), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 32 }, + { RESERVED, + .offset_words = 1, + .offset_bits = 0, + .size_bits = 8 }, + { STRUCT_FIELD(deth, source_qpn), + .offset_words = 1, + .offset_bits = 8, + .size_bits = 24 } +}; + +__sum16 ib_ud_ip4_csum(struct ib_ud_header *header) +{ + struct iphdr iph; + + iph.ihl = 5; + iph.version = 4; + iph.tos = header->ip4.tos; + iph.tot_len = header->ip4.tot_len; + iph.id = header->ip4.id; + iph.frag_off = header->ip4.frag_off; + iph.ttl = header->ip4.ttl; + iph.protocol = header->ip4.protocol; + iph.check = 0; + iph.saddr = header->ip4.saddr; + iph.daddr = header->ip4.daddr; + + return ip_fast_csum((u8 *)&iph, iph.ihl); +} +EXPORT_SYMBOL(ib_ud_ip4_csum); + +/** + * ib_ud_header_init - Initialize UD header structure + * @payload_bytes:Length of packet payload + * @lrh_present: specify if LRH is present + * @eth_present: specify if Eth header is present + * @vlan_present: packet is tagged vlan + * @grh_present: GRH flag (if non-zero, GRH will be included) + * @ip_version: if non-zero, IP header, V4 or V6, will be included + * @udp_present :if non-zero, UDP header will be included + * @immediate_present: specify if immediate data is present + * @header:Structure to initialize + */ +int ib_ud_header_init(int payload_bytes, + int lrh_present, + int eth_present, + int vlan_present, + int grh_present, + int ip_version, + int udp_present, + int immediate_present, + struct ib_ud_header *header) +{ + size_t udp_bytes = udp_present ? IB_UDP_BYTES : 0; + + grh_present = grh_present && !ip_version; + memset(header, 0, sizeof *header); + + /* + * UDP header without IP header doesn't make sense + */ + if (udp_present && ip_version != 4 && ip_version != 6) + return -EINVAL; + + if (lrh_present) { + u16 packet_length; + + header->lrh.link_version = 0; + header->lrh.link_next_header = + grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL; + packet_length = (IB_LRH_BYTES + + IB_BTH_BYTES + + IB_DETH_BYTES + + (grh_present ? IB_GRH_BYTES : 0) + + payload_bytes + + 4 + /* ICRC */ + 3) / 4; /* round up */ + header->lrh.packet_length = cpu_to_be16(packet_length); + } + + if (vlan_present) + header->eth.type = cpu_to_be16(ETH_P_8021Q); + + if (ip_version == 6 || grh_present) { + header->grh.ip_version = 6; + header->grh.payload_length = + cpu_to_be16((udp_bytes + + IB_BTH_BYTES + + IB_DETH_BYTES + + payload_bytes + + 4 + /* ICRC */ + 3) & ~3); /* round up */ + header->grh.next_header = udp_present ? IPPROTO_UDP : 0x1b; + } + + if (ip_version == 4) { + header->ip4.ver = 4; /* version 4 */ + header->ip4.hdr_len = 5; /* 5 words */ + header->ip4.tot_len = + cpu_to_be16(IB_IP4_BYTES + + udp_bytes + + IB_BTH_BYTES + + IB_DETH_BYTES + + payload_bytes + + 4); /* ICRC */ + header->ip4.protocol = IPPROTO_UDP; + } + if (udp_present && ip_version) + header->udp.length = + cpu_to_be16(IB_UDP_BYTES + + IB_BTH_BYTES + + IB_DETH_BYTES + + payload_bytes + + 4); /* ICRC */ + + if (immediate_present) + header->bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; + else + header->bth.opcode = IB_OPCODE_UD_SEND_ONLY; + header->bth.pad_count = (4 - payload_bytes) & 3; + header->bth.transport_header_version = 0; + + header->lrh_present = lrh_present; + header->eth_present = eth_present; + header->vlan_present = vlan_present; + header->grh_present = grh_present || (ip_version == 6); + header->ipv4_present = ip_version == 4; + header->udp_present = udp_present; + header->immediate_present = immediate_present; + return 0; +} +EXPORT_SYMBOL(ib_ud_header_init); + +/** + * ib_ud_header_pack - Pack UD header struct into wire format + * @header:UD header struct + * @buf:Buffer to pack into + * + * ib_ud_header_pack() packs the UD header structure @header into wire + * format in the buffer @buf. + */ +int ib_ud_header_pack(struct ib_ud_header *header, + void *buf) +{ + int len = 0; + + if (header->lrh_present) { + ib_pack(lrh_table, ARRAY_SIZE(lrh_table), + &header->lrh, buf + len); + len += IB_LRH_BYTES; + } + if (header->eth_present) { + ib_pack(eth_table, ARRAY_SIZE(eth_table), + &header->eth, buf + len); + len += IB_ETH_BYTES; + } + if (header->vlan_present) { + ib_pack(vlan_table, ARRAY_SIZE(vlan_table), + &header->vlan, buf + len); + len += IB_VLAN_BYTES; + } + if (header->grh_present) { + ib_pack(grh_table, ARRAY_SIZE(grh_table), + &header->grh, buf + len); + len += IB_GRH_BYTES; + } + if (header->ipv4_present) { + ib_pack(ip4_table, ARRAY_SIZE(ip4_table), + &header->ip4, buf + len); + len += IB_IP4_BYTES; + } + if (header->udp_present) { + ib_pack(udp_table, ARRAY_SIZE(udp_table), + &header->udp, buf + len); + len += IB_UDP_BYTES; + } + + ib_pack(bth_table, ARRAY_SIZE(bth_table), + &header->bth, buf + len); + len += IB_BTH_BYTES; + + ib_pack(deth_table, ARRAY_SIZE(deth_table), + &header->deth, buf + len); + len += IB_DETH_BYTES; + + if (header->immediate_present) { + memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data); + len += sizeof header->immediate_data; + } + + return len; +} +EXPORT_SYMBOL(ib_ud_header_pack); + +/** + * ib_ud_header_unpack - Unpack UD header struct from wire format + * @header:UD header struct + * @buf:Buffer to pack into + * + * ib_ud_header_pack() unpacks the UD header structure @header from wire + * format in the buffer @buf. + */ +int ib_ud_header_unpack(void *buf, + struct ib_ud_header *header) +{ + ib_unpack(lrh_table, ARRAY_SIZE(lrh_table), + buf, &header->lrh); + buf += IB_LRH_BYTES; + + if (header->lrh.link_version != 0) { + pr_warn("Invalid LRH.link_version %u\n", + header->lrh.link_version); + return -EINVAL; + } + + switch (header->lrh.link_next_header) { + case IB_LNH_IBA_LOCAL: + header->grh_present = 0; + break; + + case IB_LNH_IBA_GLOBAL: + header->grh_present = 1; + ib_unpack(grh_table, ARRAY_SIZE(grh_table), + buf, &header->grh); + buf += IB_GRH_BYTES; + + if (header->grh.ip_version != 6) { + pr_warn("Invalid GRH.ip_version %u\n", + header->grh.ip_version); + return -EINVAL; + } + if (header->grh.next_header != 0x1b) { + pr_warn("Invalid GRH.next_header 0x%02x\n", + header->grh.next_header); + return -EINVAL; + } + break; + + default: + pr_warn("Invalid LRH.link_next_header %u\n", + header->lrh.link_next_header); + return -EINVAL; + } + + ib_unpack(bth_table, ARRAY_SIZE(bth_table), + buf, &header->bth); + buf += IB_BTH_BYTES; + + switch (header->bth.opcode) { + case IB_OPCODE_UD_SEND_ONLY: + header->immediate_present = 0; + break; + case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE: + header->immediate_present = 1; + break; + default: + pr_warn("Invalid BTH.opcode 0x%02x\n", header->bth.opcode); + return -EINVAL; + } + + if (header->bth.transport_header_version != 0) { + pr_warn("Invalid BTH.transport_header_version %u\n", + header->bth.transport_header_version); + return -EINVAL; + } + + ib_unpack(deth_table, ARRAY_SIZE(deth_table), + buf, &header->deth); + buf += IB_DETH_BYTES; + + if (header->immediate_present) + memcpy(&header->immediate_data, buf, sizeof header->immediate_data); + + return 0; +} +EXPORT_SYMBOL(ib_ud_header_unpack); -- cgit v1.2.3