From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- include/rdma/ib_pack.h | 286 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 286 insertions(+) create mode 100644 include/rdma/ib_pack.h (limited to 'include/rdma/ib_pack.h') diff --git a/include/rdma/ib_pack.h b/include/rdma/ib_pack.h new file mode 100644 index 000000000..8266fab82 --- /dev/null +++ b/include/rdma/ib_pack.h @@ -0,0 +1,286 @@ +/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ +/* + * Copyright (c) 2004 Topspin Corporation. All rights reserved. + */ + +#ifndef IB_PACK_H +#define IB_PACK_H + +#include +#include + +enum { + IB_LRH_BYTES = 8, + IB_ETH_BYTES = 14, + IB_VLAN_BYTES = 4, + IB_GRH_BYTES = 40, + IB_IP4_BYTES = 20, + IB_UDP_BYTES = 8, + IB_BTH_BYTES = 12, + IB_DETH_BYTES = 8, + IB_EXT_ATOMICETH_BYTES = 28, + IB_EXT_XRC_BYTES = 4, + IB_ICRC_BYTES = 4 +}; + +struct ib_field { + size_t struct_offset_bytes; + size_t struct_size_bytes; + int offset_words; + int offset_bits; + int size_bits; + char *field_name; +}; + +#define RESERVED \ + .field_name = "reserved" + +/* + * This macro cleans up the definitions of constants for BTH opcodes. + * It is used to define constants such as IB_OPCODE_UD_SEND_ONLY, + * which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives + * the correct value. + * + * In short, user code should use the constants defined using the + * macro rather than worrying about adding together other constants. +*/ +#define IB_OPCODE(transport, op) \ + IB_OPCODE_ ## transport ## _ ## op = \ + IB_OPCODE_ ## transport + IB_OPCODE_ ## op + +enum { + /* transport types -- just used to define real constants */ + IB_OPCODE_RC = 0x00, + IB_OPCODE_UC = 0x20, + IB_OPCODE_RD = 0x40, + IB_OPCODE_UD = 0x60, + /* per IBTA 1.3 vol 1 Table 38, A10.3.2 */ + IB_OPCODE_CNP = 0x80, + /* Manufacturer specific */ + IB_OPCODE_MSP = 0xe0, + + /* operations -- just used to define real constants */ + IB_OPCODE_SEND_FIRST = 0x00, + IB_OPCODE_SEND_MIDDLE = 0x01, + IB_OPCODE_SEND_LAST = 0x02, + IB_OPCODE_SEND_LAST_WITH_IMMEDIATE = 0x03, + IB_OPCODE_SEND_ONLY = 0x04, + IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE = 0x05, + IB_OPCODE_RDMA_WRITE_FIRST = 0x06, + IB_OPCODE_RDMA_WRITE_MIDDLE = 0x07, + IB_OPCODE_RDMA_WRITE_LAST = 0x08, + IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE = 0x09, + IB_OPCODE_RDMA_WRITE_ONLY = 0x0a, + IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE = 0x0b, + IB_OPCODE_RDMA_READ_REQUEST = 0x0c, + IB_OPCODE_RDMA_READ_RESPONSE_FIRST = 0x0d, + IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE = 0x0e, + IB_OPCODE_RDMA_READ_RESPONSE_LAST = 0x0f, + IB_OPCODE_RDMA_READ_RESPONSE_ONLY = 0x10, + IB_OPCODE_ACKNOWLEDGE = 0x11, + IB_OPCODE_ATOMIC_ACKNOWLEDGE = 0x12, + IB_OPCODE_COMPARE_SWAP = 0x13, + IB_OPCODE_FETCH_ADD = 0x14, + /* opcode 0x15 is reserved */ + IB_OPCODE_SEND_LAST_WITH_INVALIDATE = 0x16, + IB_OPCODE_SEND_ONLY_WITH_INVALIDATE = 0x17, + IB_OPCODE_FLUSH = 0x1C, + IB_OPCODE_ATOMIC_WRITE = 0x1D, + + /* real constants follow -- see comment about above IB_OPCODE() + macro for more details */ + + /* RC */ + IB_OPCODE(RC, SEND_FIRST), + IB_OPCODE(RC, SEND_MIDDLE), + IB_OPCODE(RC, SEND_LAST), + IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE), + IB_OPCODE(RC, SEND_ONLY), + IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE), + IB_OPCODE(RC, RDMA_WRITE_FIRST), + IB_OPCODE(RC, RDMA_WRITE_MIDDLE), + IB_OPCODE(RC, RDMA_WRITE_LAST), + IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE), + IB_OPCODE(RC, RDMA_WRITE_ONLY), + IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE), + IB_OPCODE(RC, RDMA_READ_REQUEST), + IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST), + IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE), + IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST), + IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY), + IB_OPCODE(RC, ACKNOWLEDGE), + IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE), + IB_OPCODE(RC, COMPARE_SWAP), + IB_OPCODE(RC, FETCH_ADD), + IB_OPCODE(RC, SEND_LAST_WITH_INVALIDATE), + IB_OPCODE(RC, SEND_ONLY_WITH_INVALIDATE), + IB_OPCODE(RC, FLUSH), + IB_OPCODE(RC, ATOMIC_WRITE), + + /* UC */ + IB_OPCODE(UC, SEND_FIRST), + IB_OPCODE(UC, SEND_MIDDLE), + IB_OPCODE(UC, SEND_LAST), + IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE), + IB_OPCODE(UC, SEND_ONLY), + IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE), + IB_OPCODE(UC, RDMA_WRITE_FIRST), + IB_OPCODE(UC, RDMA_WRITE_MIDDLE), + IB_OPCODE(UC, RDMA_WRITE_LAST), + IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE), + IB_OPCODE(UC, RDMA_WRITE_ONLY), + IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE), + + /* RD */ + IB_OPCODE(RD, SEND_FIRST), + IB_OPCODE(RD, SEND_MIDDLE), + IB_OPCODE(RD, SEND_LAST), + IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE), + IB_OPCODE(RD, SEND_ONLY), + IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE), + IB_OPCODE(RD, RDMA_WRITE_FIRST), + IB_OPCODE(RD, RDMA_WRITE_MIDDLE), + IB_OPCODE(RD, RDMA_WRITE_LAST), + IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE), + IB_OPCODE(RD, RDMA_WRITE_ONLY), + IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE), + IB_OPCODE(RD, RDMA_READ_REQUEST), + IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST), + IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE), + IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST), + IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY), + IB_OPCODE(RD, ACKNOWLEDGE), + IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE), + IB_OPCODE(RD, COMPARE_SWAP), + IB_OPCODE(RD, FETCH_ADD), + IB_OPCODE(RD, FLUSH), + + /* UD */ + IB_OPCODE(UD, SEND_ONLY), + IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE) +}; + +enum { + IB_LNH_RAW = 0, + IB_LNH_IP = 1, + IB_LNH_IBA_LOCAL = 2, + IB_LNH_IBA_GLOBAL = 3 +}; + +struct ib_unpacked_lrh { + u8 virtual_lane; + u8 link_version; + u8 service_level; + u8 link_next_header; + __be16 destination_lid; + __be16 packet_length; + __be16 source_lid; +}; + +struct ib_unpacked_grh { + u8 ip_version; + u8 traffic_class; + __be32 flow_label; + __be16 payload_length; + u8 next_header; + u8 hop_limit; + union ib_gid source_gid; + union ib_gid destination_gid; +}; + +struct ib_unpacked_bth { + u8 opcode; + u8 solicited_event; + u8 mig_req; + u8 pad_count; + u8 transport_header_version; + __be16 pkey; + __be32 destination_qpn; + u8 ack_req; + __be32 psn; +}; + +struct ib_unpacked_deth { + __be32 qkey; + __be32 source_qpn; +}; + +struct ib_unpacked_eth { + u8 dmac_h[4]; + u8 dmac_l[2]; + u8 smac_h[2]; + u8 smac_l[4]; + __be16 type; +}; + +struct ib_unpacked_ip4 { + u8 ver; + u8 hdr_len; + u8 tos; + __be16 tot_len; + __be16 id; + __be16 frag_off; + u8 ttl; + u8 protocol; + __sum16 check; + __be32 saddr; + __be32 daddr; +}; + +struct ib_unpacked_udp { + __be16 sport; + __be16 dport; + __be16 length; + __be16 csum; +}; + +struct ib_unpacked_vlan { + __be16 tag; + __be16 type; +}; + +struct ib_ud_header { + int lrh_present; + struct ib_unpacked_lrh lrh; + int eth_present; + struct ib_unpacked_eth eth; + int vlan_present; + struct ib_unpacked_vlan vlan; + int grh_present; + struct ib_unpacked_grh grh; + int ipv4_present; + struct ib_unpacked_ip4 ip4; + int udp_present; + struct ib_unpacked_udp udp; + struct ib_unpacked_bth bth; + struct ib_unpacked_deth deth; + int immediate_present; + __be32 immediate_data; +}; + +void ib_pack(const struct ib_field *desc, + int desc_len, + void *structure, + void *buf); + +void ib_unpack(const struct ib_field *desc, + int desc_len, + void *buf, + void *structure); + +__sum16 ib_ud_ip4_csum(struct ib_ud_header *header); + +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); + +int ib_ud_header_pack(struct ib_ud_header *header, + void *buf); + +#endif /* IB_PACK_H */ -- cgit v1.3.1