Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 727 insertions, 0 deletions

diff --git a/drivers/infiniband/sw/siw/siw.h b/drivers/infiniband/sw/siw/siw.h
new file mode 100644
index 000000000..2f3a9cda3
--- /dev/null
+++ b/drivers/infiniband/sw/siw/siw.h
@@ -0,0 +1,727 @@
+/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
+
+/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
+/* Copyright (c) 2008-2019, IBM Corporation */
+
+#ifndef _SIW_H
+#define _SIW_H
+
+#include <rdma/ib_verbs.h>
+#include <rdma/restrack.h>
+#include <linux/socket.h>
+#include <linux/skbuff.h>
+#include <crypto/hash.h>
+#include <linux/crc32.h>
+#include <linux/crc32c.h>
+
+#include <rdma/siw-abi.h>
+#include "iwarp.h"
+
+#define SIW_VENDOR_ID 0x626d74 /* ascii 'bmt' for now */
+#define SIW_VENDORT_PART_ID 0
+#define SIW_MAX_QP (1024 * 100)
+#define SIW_MAX_QP_WR (1024 * 32)
+#define SIW_MAX_ORD_QP 128
+#define SIW_MAX_IRD_QP 128
+#define SIW_MAX_SGE_PBL 256 /* max num sge's for PBL */
+#define SIW_MAX_SGE_RD 1 /* iwarp limitation. we could relax */
+#define SIW_MAX_CQ (1024 * 100)
+#define SIW_MAX_CQE (SIW_MAX_QP_WR * 100)
+#define SIW_MAX_MR (SIW_MAX_QP * 10)
+#define SIW_MAX_PD SIW_MAX_QP
+#define SIW_MAX_MW 0 /* to be set if MW's are supported */
+#define SIW_MAX_SRQ SIW_MAX_QP
+#define SIW_MAX_SRQ_WR (SIW_MAX_QP_WR * 10)
+#define SIW_MAX_CONTEXT SIW_MAX_PD
+
+/* Min number of bytes for using zero copy transmit */
+#define SENDPAGE_THRESH PAGE_SIZE
+
+/* Maximum number of frames which can be send in one SQ processing */
+#define SQ_USER_MAXBURST 100
+
+/* Maximum number of consecutive IRQ elements which get served
+ * if SQ has pending work. Prevents starving local SQ processing
+ * by serving peer Read Requests.
+ */
+#define SIW_IRQ_MAXBURST_SQ_ACTIVE 4
+
+struct siw_dev_cap {
+	int max_qp;
+	int max_qp_wr;
+	int max_ord; /* max. outbound read queue depth */
+	int max_ird; /* max. inbound read queue depth */
+	int max_sge;
+	int max_sge_rd;
+	int max_cq;
+	int max_cqe;
+	int max_mr;
+	int max_pd;
+	int max_mw;
+	int max_srq;
+	int max_srq_wr;
+	int max_srq_sge;
+};
+
+struct siw_pd {
+	struct ib_pd base_pd;
+};
+
+struct siw_device {
+	struct ib_device base_dev;
+	struct net_device *netdev;
+	struct siw_dev_cap attrs;
+
+	u32 vendor_part_id;
+	int numa_node;
+
+	/* physical port state (only one port per device) */
+	enum ib_port_state state;
+
+	spinlock_t lock;
+
+	struct xarray qp_xa;
+	struct xarray mem_xa;
+
+	struct list_head cep_list;
+	struct list_head qp_list;
+
+	/* active objects statistics to enforce limits */
+	atomic_t num_qp;
+	atomic_t num_cq;
+	atomic_t num_pd;
+	atomic_t num_mr;
+	atomic_t num_srq;
+	atomic_t num_ctx;
+
+	struct work_struct netdev_down;
+};
+
+struct siw_ucontext {
+	struct ib_ucontext base_ucontext;
+	struct siw_device *sdev;
+};
+
+/*
+ * The RDMA core does not define LOCAL_READ access, which is always
+ * enabled implictely.
+ */
+#define IWARP_ACCESS_MASK					\
+	(IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE	|	\
+	 IB_ACCESS_REMOTE_READ)
+
+/*
+ * siw presentation of user memory registered as source
+ * or target of RDMA operations.
+ */
+
+struct siw_page_chunk {
+	struct page **plist;
+};
+
+struct siw_umem {
+	struct siw_page_chunk *page_chunk;
+	int num_pages;
+	bool writable;
+	u64 fp_addr; /* First page base address */
+	struct mm_struct *owning_mm;
+};
+
+struct siw_pble {
+	dma_addr_t addr; /* Address of assigned buffer */
+	unsigned int size; /* Size of this entry */
+	unsigned long pbl_off; /* Total offset from start of PBL */
+};
+
+struct siw_pbl {
+	unsigned int num_buf;
+	unsigned int max_buf;
+	struct siw_pble pbe[];
+};
+
+/*
+ * Generic memory representation for registered siw memory.
+ * Memory lookup always via higher 24 bit of STag (STag index).
+ */
+struct siw_mem {
+	struct siw_device *sdev;
+	struct kref ref;
+	u64 va; /* VA of memory */
+	u64 len; /* length of the memory buffer in bytes */
+	u32 stag; /* iWarp memory access steering tag */
+	u8 stag_valid; /* VALID or INVALID */
+	u8 is_pbl; /* PBL or user space mem */
+	u8 is_mw; /* Memory Region or Memory Window */
+	enum ib_access_flags perms; /* local/remote READ & WRITE */
+	union {
+		struct siw_umem *umem;
+		struct siw_pbl *pbl;
+		void *mem_obj;
+	};
+	struct ib_pd *pd;
+};
+
+struct siw_mr {
+	struct ib_mr base_mr;
+	struct siw_mem *mem;
+	struct rcu_head rcu;
+};
+
+/*
+ * Error codes for local or remote
+ * access to registered memory
+ */
+enum siw_access_state {
+	E_ACCESS_OK,
+	E_STAG_INVALID,
+	E_BASE_BOUNDS,
+	E_ACCESS_PERM,
+	E_PD_MISMATCH
+};
+
+enum siw_wr_state {
+	SIW_WR_IDLE,
+	SIW_WR_QUEUED, /* processing has not started yet */
+	SIW_WR_INPROGRESS /* initiated processing of the WR */
+};
+
+/* The WQE currently being processed (RX or TX) */
+struct siw_wqe {
+	/* Copy of applications SQE or RQE */
+	union {
+		struct siw_sqe sqe;
+		struct siw_rqe rqe;
+	};
+	struct siw_mem *mem[SIW_MAX_SGE]; /* per sge's resolved mem */
+	enum siw_wr_state wr_status;
+	enum siw_wc_status wc_status;
+	u32 bytes; /* total bytes to process */
+	u32 processed; /* bytes processed */
+};
+
+struct siw_cq {
+	struct ib_cq base_cq;
+	spinlock_t lock;
+	struct siw_cq_ctrl *notify;
+	struct siw_cqe *queue;
+	u32 cq_put;
+	u32 cq_get;
+	u32 num_cqe;
+	struct rdma_user_mmap_entry *cq_entry; /* mmap info for CQE array */
+	u32 id; /* For debugging only */
+};
+
+enum siw_qp_state {
+	SIW_QP_STATE_IDLE,
+	SIW_QP_STATE_RTR,
+	SIW_QP_STATE_RTS,
+	SIW_QP_STATE_CLOSING,
+	SIW_QP_STATE_TERMINATE,
+	SIW_QP_STATE_ERROR,
+	SIW_QP_STATE_COUNT
+};
+
+enum siw_qp_flags {
+	SIW_RDMA_BIND_ENABLED = (1 << 0),
+	SIW_RDMA_WRITE_ENABLED = (1 << 1),
+	SIW_RDMA_READ_ENABLED = (1 << 2),
+	SIW_SIGNAL_ALL_WR = (1 << 3),
+	SIW_MPA_CRC = (1 << 4),
+	SIW_QP_IN_DESTROY = (1 << 5)
+};
+
+enum siw_qp_attr_mask {
+	SIW_QP_ATTR_STATE = (1 << 0),
+	SIW_QP_ATTR_ACCESS_FLAGS = (1 << 1),
+	SIW_QP_ATTR_LLP_HANDLE = (1 << 2),
+	SIW_QP_ATTR_ORD = (1 << 3),
+	SIW_QP_ATTR_IRD = (1 << 4),
+	SIW_QP_ATTR_SQ_SIZE = (1 << 5),
+	SIW_QP_ATTR_RQ_SIZE = (1 << 6),
+	SIW_QP_ATTR_MPA = (1 << 7)
+};
+
+struct siw_srq {
+	struct ib_srq base_srq;
+	spinlock_t lock;
+	u32 max_sge;
+	u32 limit; /* low watermark for async event */
+	struct siw_rqe *recvq;
+	u32 rq_put;
+	u32 rq_get;
+	u32 num_rqe; /* max # of wqe's allowed */
+	struct rdma_user_mmap_entry *srq_entry; /* mmap info for SRQ array */
+	bool armed:1; /* inform user if limit hit */
+	bool is_kernel_res:1; /* true if kernel client */
+};
+
+struct siw_qp_attrs {
+	enum siw_qp_state state;
+	u32 sq_size;
+	u32 rq_size;
+	u32 orq_size;
+	u32 irq_size;
+	u32 sq_max_sges;
+	u32 rq_max_sges;
+	enum siw_qp_flags flags;
+
+	struct socket *sk;
+};
+
+enum siw_tx_ctx {
+	SIW_SEND_HDR, /* start or continue sending HDR */
+	SIW_SEND_DATA, /* start or continue sending DDP payload */
+	SIW_SEND_TRAILER, /* start or continue sending TRAILER */
+	SIW_SEND_SHORT_FPDU/* send whole FPDU hdr|data|trailer at once */
+};
+
+enum siw_rx_state {
+	SIW_GET_HDR, /* await new hdr or within hdr */
+	SIW_GET_DATA_START, /* start of inbound DDP payload */
+	SIW_GET_DATA_MORE, /* continuation of (misaligned) DDP payload */
+	SIW_GET_TRAILER/* await new trailer or within trailer */
+};
+
+struct siw_rx_stream {
+	struct sk_buff *skb;
+	int skb_new; /* pending unread bytes in skb */
+	int skb_offset; /* offset in skb */
+	int skb_copied; /* processed bytes in skb */
+
+	union iwarp_hdr hdr;
+	struct mpa_trailer trailer;
+
+	enum siw_rx_state state;
+
+	/*
+	 * For each FPDU, main RX loop runs through 3 stages:
+	 * Receiving protocol headers, placing DDP payload and receiving
+	 * trailer information (CRC + possibly padding).
+	 * Next two variables keep state on receive status of the
+	 * current FPDU part (hdr, data, trailer).
+	 */
+	int fpdu_part_rcvd; /* bytes in pkt part copied */
+	int fpdu_part_rem; /* bytes in pkt part not seen */
+
+	/*
+	 * Next expected DDP MSN for each QN +
+	 * expected steering tag +
+	 * expected DDP tagget offset (all HBO)
+	 */
+	u32 ddp_msn[RDMAP_UNTAGGED_QN_COUNT];
+	u32 ddp_stag;
+	u64 ddp_to;
+	u32 inval_stag; /* Stag to be invalidated */
+
+	struct shash_desc *mpa_crc_hd;
+	u8 rx_suspend : 1;
+	u8 pad : 2; /* # of pad bytes expected */
+	u8 rdmap_op : 4; /* opcode of current frame */
+};
+
+struct siw_rx_fpdu {
+	/*
+	 * Local destination memory of inbound RDMA operation.
+	 * Valid, according to wqe->wr_status
+	 */
+	struct siw_wqe wqe_active;
+
+	unsigned int pbl_idx; /* Index into current PBL */
+	unsigned int sge_idx; /* current sge in rx */
+	unsigned int sge_off; /* already rcvd in curr. sge */
+
+	char first_ddp_seg; /* this is the first DDP seg */
+	char more_ddp_segs; /* more DDP segs expected */
+	u8 prev_rdmap_op : 4; /* opcode of prev frame */
+};
+
+/*
+ * Shorthands for short packets w/o payload
+ * to be transmitted more efficient.
+ */
+struct siw_send_pkt {
+	struct iwarp_send send;
+	__be32 crc;
+};
+
+struct siw_write_pkt {
+	struct iwarp_rdma_write write;
+	__be32 crc;
+};
+
+struct siw_rreq_pkt {
+	struct iwarp_rdma_rreq rreq;
+	__be32 crc;
+};
+
+struct siw_rresp_pkt {
+	struct iwarp_rdma_rresp rresp;
+	__be32 crc;
+};
+
+struct siw_iwarp_tx {
+	union {
+		union iwarp_hdr hdr;
+
+		/* Generic part of FPDU header */
+		struct iwarp_ctrl ctrl;
+		struct iwarp_ctrl_untagged c_untagged;
+		struct iwarp_ctrl_tagged c_tagged;
+
+		/* FPDU headers */
+		struct iwarp_rdma_write rwrite;
+		struct iwarp_rdma_rreq rreq;
+		struct iwarp_rdma_rresp rresp;
+		struct iwarp_terminate terminate;
+		struct iwarp_send send;
+		struct iwarp_send_inv send_inv;
+
+		/* complete short FPDUs */
+		struct siw_send_pkt send_pkt;
+		struct siw_write_pkt write_pkt;
+		struct siw_rreq_pkt rreq_pkt;
+		struct siw_rresp_pkt rresp_pkt;
+	} pkt;
+
+	struct mpa_trailer trailer;
+	/* DDP MSN for untagged messages */
+	u32 ddp_msn[RDMAP_UNTAGGED_QN_COUNT];
+
+	enum siw_tx_ctx state;
+	u16 ctrl_len; /* ddp+rdmap hdr */
+	u16 ctrl_sent;
+	int burst;
+	int bytes_unsent; /* ddp payload bytes */
+
+	struct shash_desc *mpa_crc_hd;
+
+	u8 do_crc : 1; /* do crc for segment */
+	u8 use_sendpage : 1; /* send w/o copy */
+	u8 tx_suspend : 1; /* stop sending DDP segs. */
+	u8 pad : 2; /* # pad in current fpdu */
+	u8 orq_fence : 1; /* ORQ full or Send fenced */
+	u8 in_syscall : 1; /* TX out of user context */
+	u8 zcopy_tx : 1; /* Use TCP_SENDPAGE if possible */
+	u8 gso_seg_limit; /* Maximum segments for GSO, 0 = unbound */
+
+	u16 fpdu_len; /* len of FPDU to tx */
+	unsigned int tcp_seglen; /* remaining tcp seg space */
+
+	struct siw_wqe wqe_active;
+
+	int pbl_idx; /* Index into current PBL */
+	int sge_idx; /* current sge in tx */
+	u32 sge_off; /* already sent in curr. sge */
+};
+
+struct siw_qp {
+	struct ib_qp base_qp;
+	struct siw_device *sdev;
+	struct kref ref;
+	struct completion qp_free;
+	struct list_head devq;
+	int tx_cpu;
+	struct siw_qp_attrs attrs;
+
+	struct siw_cep *cep;
+	struct rw_semaphore state_lock;
+
+	struct ib_pd *pd;
+	struct siw_cq *scq;
+	struct siw_cq *rcq;
+	struct siw_srq *srq;
+
+	struct siw_iwarp_tx tx_ctx; /* Transmit context */
+	spinlock_t sq_lock;
+	struct siw_sqe *sendq; /* send queue element array */
+	uint32_t sq_get; /* consumer index into sq array */
+	uint32_t sq_put; /* kernel prod. index into sq array */
+	struct llist_node tx_list;
+
+	struct siw_sqe *orq; /* outbound read queue element array */
+	spinlock_t orq_lock;
+	uint32_t orq_get; /* consumer index into orq array */
+	uint32_t orq_put; /* shared producer index for ORQ */
+
+	struct siw_rx_stream rx_stream;
+	struct siw_rx_fpdu *rx_fpdu;
+	struct siw_rx_fpdu rx_tagged;
+	struct siw_rx_fpdu rx_untagged;
+	spinlock_t rq_lock;
+	struct siw_rqe *recvq; /* recv queue element array */
+	uint32_t rq_get; /* consumer index into rq array */
+	uint32_t rq_put; /* kernel prod. index into rq array */
+
+	struct siw_sqe *irq; /* inbound read queue element array */
+	uint32_t irq_get; /* consumer index into irq array */
+	uint32_t irq_put; /* producer index into irq array */
+	int irq_burst;
+
+	struct { /* information to be carried in TERMINATE pkt, if valid */
+		u8 valid;
+		u8 in_tx;
+		u8 layer : 4, etype : 4;
+		u8 ecode;
+	} term_info;
+	struct rdma_user_mmap_entry *sq_entry; /* mmap info for SQE array */
+	struct rdma_user_mmap_entry *rq_entry; /* mmap info for RQE array */
+	struct rcu_head rcu;
+};
+
+/* helper macros */
+#define rx_qp(rx) container_of(rx, struct siw_qp, rx_stream)
+#define tx_qp(tx) container_of(tx, struct siw_qp, tx_ctx)
+#define tx_wqe(qp) (&(qp)->tx_ctx.wqe_active)
+#define rx_wqe(rctx) (&(rctx)->wqe_active)
+#define rx_mem(rctx) ((rctx)->wqe_active.mem[0])
+#define tx_type(wqe) ((wqe)->sqe.opcode)
+#define rx_type(wqe) ((wqe)->rqe.opcode)
+#define tx_flags(wqe) ((wqe)->sqe.flags)
+
+struct iwarp_msg_info {
+	int hdr_len;
+	struct iwarp_ctrl ctrl;
+	int (*rx_data)(struct siw_qp *qp);
+};
+
+struct siw_user_mmap_entry {
+	struct rdma_user_mmap_entry rdma_entry;
+	void *address;
+};
+
+/* Global siw parameters. Currently set in siw_main.c */
+extern const bool zcopy_tx;
+extern const bool try_gso;
+extern const bool loopback_enabled;
+extern const bool mpa_crc_required;
+extern const bool mpa_crc_strict;
+extern const bool siw_tcp_nagle;
+extern u_char mpa_version;
+extern const bool peer_to_peer;
+extern struct task_struct *siw_tx_thread[];
+
+extern struct crypto_shash *siw_crypto_shash;
+extern struct iwarp_msg_info iwarp_pktinfo[RDMAP_TERMINATE + 1];
+
+/* QP general functions */
+int siw_qp_modify(struct siw_qp *qp, struct siw_qp_attrs *attr,
+		  enum siw_qp_attr_mask mask);
+int siw_qp_mpa_rts(struct siw_qp *qp, enum mpa_v2_ctrl ctrl);
+void siw_qp_llp_close(struct siw_qp *qp);
+void siw_qp_cm_drop(struct siw_qp *qp, int schedule);
+void siw_send_terminate(struct siw_qp *qp);
+
+void siw_qp_get_ref(struct ib_qp *qp);
+void siw_qp_put_ref(struct ib_qp *qp);
+int siw_qp_add(struct siw_device *sdev, struct siw_qp *qp);
+void siw_free_qp(struct kref *ref);
+
+void siw_init_terminate(struct siw_qp *qp, enum term_elayer layer,
+			u8 etype, u8 ecode, int in_tx);
+enum ddp_ecode siw_tagged_error(enum siw_access_state state);
+enum rdmap_ecode siw_rdmap_error(enum siw_access_state state);
+
+void siw_read_to_orq(struct siw_sqe *rreq, struct siw_sqe *sqe);
+int siw_sqe_complete(struct siw_qp *qp, struct siw_sqe *sqe, u32 bytes,
+		     enum siw_wc_status status);
+int siw_rqe_complete(struct siw_qp *qp, struct siw_rqe *rqe, u32 bytes,
+		     u32 inval_stag, enum siw_wc_status status);
+void siw_qp_llp_data_ready(struct sock *sk);
+void siw_qp_llp_write_space(struct sock *sk);
+
+/* QP TX path functions */
+int siw_run_sq(void *arg);
+int siw_qp_sq_process(struct siw_qp *qp);
+int siw_sq_start(struct siw_qp *qp);
+int siw_activate_tx(struct siw_qp *qp);
+void siw_stop_tx_thread(int nr_cpu);
+int siw_get_tx_cpu(struct siw_device *sdev);
+void siw_put_tx_cpu(int cpu);
+
+/* QP RX path functions */
+int siw_proc_send(struct siw_qp *qp);
+int siw_proc_rreq(struct siw_qp *qp);
+int siw_proc_rresp(struct siw_qp *qp);
+int siw_proc_write(struct siw_qp *qp);
+int siw_proc_terminate(struct siw_qp *qp);
+
+int siw_tcp_rx_data(read_descriptor_t *rd_desc, struct sk_buff *skb,
+		    unsigned int off, size_t len);
+
+static inline void set_rx_fpdu_context(struct siw_qp *qp, u8 opcode)
+{
+	if (opcode == RDMAP_RDMA_WRITE || opcode == RDMAP_RDMA_READ_RESP)
+		qp->rx_fpdu = &qp->rx_tagged;
+	else
+		qp->rx_fpdu = &qp->rx_untagged;
+
+	qp->rx_stream.rdmap_op = opcode;
+}
+
+static inline struct siw_ucontext *to_siw_ctx(struct ib_ucontext *base_ctx)
+{
+	return container_of(base_ctx, struct siw_ucontext, base_ucontext);
+}
+
+static inline struct siw_qp *to_siw_qp(struct ib_qp *base_qp)
+{
+	return container_of(base_qp, struct siw_qp, base_qp);
+}
+
+static inline struct siw_cq *to_siw_cq(struct ib_cq *base_cq)
+{
+	return container_of(base_cq, struct siw_cq, base_cq);
+}
+
+static inline struct siw_srq *to_siw_srq(struct ib_srq *base_srq)
+{
+	return container_of(base_srq, struct siw_srq, base_srq);
+}
+
+static inline struct siw_device *to_siw_dev(struct ib_device *base_dev)
+{
+	return container_of(base_dev, struct siw_device, base_dev);
+}
+
+static inline struct siw_mr *to_siw_mr(struct ib_mr *base_mr)
+{
+	return container_of(base_mr, struct siw_mr, base_mr);
+}
+
+static inline struct siw_user_mmap_entry *
+to_siw_mmap_entry(struct rdma_user_mmap_entry *rdma_mmap)
+{
+	return container_of(rdma_mmap, struct siw_user_mmap_entry, rdma_entry);
+}
+
+static inline struct siw_qp *siw_qp_id2obj(struct siw_device *sdev, int id)
+{
+	struct siw_qp *qp;
+
+	rcu_read_lock();
+	qp = xa_load(&sdev->qp_xa, id);
+	if (likely(qp && kref_get_unless_zero(&qp->ref))) {
+		rcu_read_unlock();
+		return qp;
+	}
+	rcu_read_unlock();
+	return NULL;
+}
+
+static inline u32 qp_id(struct siw_qp *qp)
+{
+	return qp->base_qp.qp_num;
+}
+
+static inline void siw_qp_get(struct siw_qp *qp)
+{
+	kref_get(&qp->ref);
+}
+
+static inline void siw_qp_put(struct siw_qp *qp)
+{
+	kref_put(&qp->ref, siw_free_qp);
+}
+
+static inline int siw_sq_empty(struct siw_qp *qp)
+{
+	struct siw_sqe *sqe = &qp->sendq[qp->sq_get % qp->attrs.sq_size];
+
+	return READ_ONCE(sqe->flags) == 0;
+}
+
+static inline struct siw_sqe *sq_get_next(struct siw_qp *qp)
+{
+	struct siw_sqe *sqe = &qp->sendq[qp->sq_get % qp->attrs.sq_size];
+
+	if (READ_ONCE(sqe->flags) & SIW_WQE_VALID)
+		return sqe;
+
+	return NULL;
+}
+
+static inline struct siw_sqe *orq_get_current(struct siw_qp *qp)
+{
+	return &qp->orq[qp->orq_get % qp->attrs.orq_size];
+}
+
+static inline struct siw_sqe *orq_get_free(struct siw_qp *qp)
+{
+	struct siw_sqe *orq_e = &qp->orq[qp->orq_put % qp->attrs.orq_size];
+
+	if (READ_ONCE(orq_e->flags) == 0)
+		return orq_e;
+
+	return NULL;
+}
+
+static inline int siw_orq_empty(struct siw_qp *qp)
+{
+	return qp->orq[qp->orq_get % qp->attrs.orq_size].flags == 0 ? 1 : 0;
+}
+
+static inline struct siw_sqe *irq_alloc_free(struct siw_qp *qp)
+{
+	struct siw_sqe *irq_e = &qp->irq[qp->irq_put % qp->attrs.irq_size];
+
+	if (READ_ONCE(irq_e->flags) == 0) {
+		qp->irq_put++;
+		return irq_e;
+	}
+	return NULL;
+}
+
+static inline __wsum siw_csum_update(const void *buff, int len, __wsum sum)
+{
+	return (__force __wsum)crc32c((__force __u32)sum, buff, len);
+}
+
+static inline __wsum siw_csum_combine(__wsum csum, __wsum csum2, int offset,
+				      int len)
+{
+	return (__force __wsum)__crc32c_le_combine((__force __u32)csum,
+						   (__force __u32)csum2, len);
+}
+
+static inline void siw_crc_skb(struct siw_rx_stream *srx, unsigned int len)
+{
+	const struct skb_checksum_ops siw_cs_ops = {
+		.update = siw_csum_update,
+		.combine = siw_csum_combine,
+	};
+	__wsum crc = *(u32 *)shash_desc_ctx(srx->mpa_crc_hd);
+
+	crc = __skb_checksum(srx->skb, srx->skb_offset, len, crc,
+			     &siw_cs_ops);
+	*(u32 *)shash_desc_ctx(srx->mpa_crc_hd) = crc;
+}
+
+#define siw_dbg(ibdev, fmt, ...)                                               \
+	ibdev_dbg(ibdev, "%s: " fmt, __func__, ##__VA_ARGS__)
+
+#define siw_dbg_qp(qp, fmt, ...)                                               \
+	ibdev_dbg(&qp->sdev->base_dev, "QP[%u] %s: " fmt, qp_id(qp), __func__, \
+		  ##__VA_ARGS__)
+
+#define siw_dbg_cq(cq, fmt, ...)                                               \
+	ibdev_dbg(cq->base_cq.device, "CQ[%u] %s: " fmt, cq->id, __func__,     \
+		  ##__VA_ARGS__)
+
+#define siw_dbg_pd(pd, fmt, ...)                                               \
+	ibdev_dbg(pd->device, "PD[%u] %s: " fmt, pd->res.id, __func__,         \
+		  ##__VA_ARGS__)
+
+#define siw_dbg_mem(mem, fmt, ...)                                             \
+	ibdev_dbg(&mem->sdev->base_dev,                                        \
+		  "MEM[0x%08x] %s: " fmt, mem->stag, __func__, ##__VA_ARGS__)
+
+#define siw_dbg_cep(cep, fmt, ...)                                             \
+	ibdev_dbg(&cep->sdev->base_dev, "CEP[0x%pK] %s: " fmt,                 \
+		  cep, __func__, ##__VA_ARGS__)
+
+void siw_cq_flush(struct siw_cq *cq);
+void siw_sq_flush(struct siw_qp *qp);
+void siw_rq_flush(struct siw_qp *qp);
+int siw_reap_cqe(struct siw_cq *cq, struct ib_wc *wc);
+
+#endif