path: root/drivers/infiniband/sw/siw/siw.h

/* 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;
	char raw_gid[ETH_ALEN];

	/* 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[] __counted_by(max_buf);
};

/*
 * 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_create_tx_threads(void);
void siw_stop_tx_threads(void);
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);
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