[deliverable/linux.git] / net / rds / ib.h

#ifndef _RDS_IB_H
#define _RDS_IB_H

#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include "rds.h"
#include "rdma_transport.h"

#define RDS_FMR_SIZE			256
#define RDS_FMR_POOL_SIZE		8192

#define RDS_IB_MAX_SGE			8
#define RDS_IB_RECV_SGE 		2

#define RDS_IB_DEFAULT_RECV_WR		1024
#define RDS_IB_DEFAULT_SEND_WR		256

#define RDS_IB_DEFAULT_RETRY_COUNT	2

#define RDS_IB_SUPPORTED_PROTOCOLS	0x00000003	/* minor versions supported */

#define RDS_IB_RECYCLE_BATCH_COUNT	32

extern struct rw_semaphore rds_ib_devices_lock;
extern struct list_head rds_ib_devices;

/*
 * IB posts RDS_FRAG_SIZE fragments of pages to the receive queues to
 * try and minimize the amount of memory tied up both the device and
 * socket receive queues.
 */
struct rds_page_frag {
	struct list_head	f_item;
	struct list_head	f_cache_entry;
	struct scatterlist	f_sg;
};

struct rds_ib_incoming {
	struct list_head	ii_frags;
	struct list_head	ii_cache_entry;
	struct rds_incoming	ii_inc;
};

struct rds_ib_cache_head {
	struct list_head *first;
	unsigned long count;
};

struct rds_ib_refill_cache {
	struct rds_ib_cache_head __percpu *percpu;
	struct list_head	 *xfer;
	struct list_head	 *ready;
};

struct rds_ib_connect_private {
	/* Add new fields at the end, and don't permute existing fields. */
	__be32			dp_saddr;
	__be32			dp_daddr;
	u8			dp_protocol_major;
	u8			dp_protocol_minor;
	__be16			dp_protocol_minor_mask; /* bitmask */
	__be32			dp_reserved1;
	__be64			dp_ack_seq;
	__be32			dp_credit;		/* non-zero enables flow ctl */
};

struct rds_ib_send_work {
	void			*s_op;
	struct ib_send_wr	s_wr;
	struct ib_sge		s_sge[RDS_IB_MAX_SGE];
	unsigned long		s_queued;
};

struct rds_ib_recv_work {
	struct rds_ib_incoming 	*r_ibinc;
	struct rds_page_frag	*r_frag;
	struct ib_recv_wr	r_wr;
	struct ib_sge		r_sge[2];
};

struct rds_ib_work_ring {
	u32		w_nr;
	u32		w_alloc_ptr;
	u32		w_alloc_ctr;
	u32		w_free_ptr;
	atomic_t	w_free_ctr;
};

struct rds_ib_device;

struct rds_ib_connection {

	struct list_head	ib_node;
	struct rds_ib_device	*rds_ibdev;
	struct rds_connection	*conn;

	/* alphabet soup, IBTA style */
	struct rdma_cm_id	*i_cm_id;
	struct ib_pd		*i_pd;
	struct ib_mr		*i_mr;
	struct ib_cq		*i_send_cq;
	struct ib_cq		*i_recv_cq;

	/* tx */
	struct rds_ib_work_ring	i_send_ring;
	struct rm_data_op	*i_data_op;
	struct rds_header	*i_send_hdrs;
	u64			i_send_hdrs_dma;
	struct rds_ib_send_work *i_sends;
	atomic_t		i_signaled_sends;

	/* rx */
	struct tasklet_struct	i_recv_tasklet;
	struct mutex		i_recv_mutex;
	struct rds_ib_work_ring	i_recv_ring;
	struct rds_ib_incoming	*i_ibinc;
	u32			i_recv_data_rem;
	struct rds_header	*i_recv_hdrs;
	u64			i_recv_hdrs_dma;
	struct rds_ib_recv_work *i_recvs;
	u64			i_ack_recv;	/* last ACK received */
	struct rds_ib_refill_cache i_cache_incs;
	struct rds_ib_refill_cache i_cache_frags;

	/* sending acks */
	unsigned long		i_ack_flags;
#ifdef KERNEL_HAS_ATOMIC64
	atomic64_t		i_ack_next;	/* next ACK to send */
#else
	spinlock_t		i_ack_lock;	/* protect i_ack_next */
	u64			i_ack_next;	/* next ACK to send */
#endif
	struct rds_header	*i_ack;
	struct ib_send_wr	i_ack_wr;
	struct ib_sge		i_ack_sge;
	u64			i_ack_dma;
	unsigned long		i_ack_queued;

	/* Flow control related information
	 *
	 * Our algorithm uses a pair variables that we need to access
	 * atomically - one for the send credits, and one posted
	 * recv credits we need to transfer to remote.
	 * Rather than protect them using a slow spinlock, we put both into
	 * a single atomic_t and update it using cmpxchg
	 */
	atomic_t		i_credits;

	/* Protocol version specific information */
	unsigned int		i_flowctl:1;	/* enable/disable flow ctl */

	/* Batched completions */
	unsigned int		i_unsignaled_wrs;
};

/* This assumes that atomic_t is at least 32 bits */
#define IB_GET_SEND_CREDITS(v)	((v) & 0xffff)
#define IB_GET_POST_CREDITS(v)	((v) >> 16)
#define IB_SET_SEND_CREDITS(v)	((v) & 0xffff)
#define IB_SET_POST_CREDITS(v)	((v) << 16)

struct rds_ib_ipaddr {
	struct list_head	list;
	__be32			ipaddr;
};

struct rds_ib_device {
	struct list_head	list;
	struct list_head	ipaddr_list;
	struct list_head	conn_list;
	struct ib_device	*dev;
	struct ib_pd		*pd;
	struct ib_mr		*mr;
	struct rds_ib_mr_pool	*mr_pool;
	unsigned int		fmr_max_remaps;
	unsigned int		max_fmrs;
	int			max_sge;
	unsigned int		max_wrs;
	unsigned int		max_initiator_depth;
	unsigned int		max_responder_resources;
	spinlock_t		spinlock;	/* protect the above */
	atomic_t		refcount;
	struct work_struct	free_work;
};

#define ibdev_to_node(ibdev) dev_to_node(ibdev->dma_device)
#define rdsibdev_to_node(rdsibdev) ibdev_to_node(rdsibdev->dev)

/* bits for i_ack_flags */
#define IB_ACK_IN_FLIGHT	0
#define IB_ACK_REQUESTED	1

/* Magic WR_ID for ACKs */
#define RDS_IB_ACK_WR_ID	(~(u64) 0)

struct rds_ib_statistics {
	uint64_t	s_ib_connect_raced;
	uint64_t	s_ib_listen_closed_stale;
	uint64_t	s_ib_tx_cq_call;
	uint64_t	s_ib_tx_cq_event;
	uint64_t	s_ib_tx_ring_full;
	uint64_t	s_ib_tx_throttle;
	uint64_t	s_ib_tx_sg_mapping_failure;
	uint64_t	s_ib_tx_stalled;
	uint64_t	s_ib_tx_credit_updates;
	uint64_t	s_ib_rx_cq_call;
	uint64_t	s_ib_rx_cq_event;
	uint64_t	s_ib_rx_ring_empty;
	uint64_t	s_ib_rx_refill_from_cq;
	uint64_t	s_ib_rx_refill_from_thread;
	uint64_t	s_ib_rx_alloc_limit;
	uint64_t	s_ib_rx_credit_updates;
	uint64_t	s_ib_ack_sent;
	uint64_t	s_ib_ack_send_failure;
	uint64_t	s_ib_ack_send_delayed;
	uint64_t	s_ib_ack_send_piggybacked;
	uint64_t	s_ib_ack_received;
	uint64_t	s_ib_rdma_mr_alloc;
	uint64_t	s_ib_rdma_mr_free;
	uint64_t	s_ib_rdma_mr_used;
	uint64_t	s_ib_rdma_mr_pool_flush;
	uint64_t	s_ib_rdma_mr_pool_wait;
	uint64_t	s_ib_rdma_mr_pool_depleted;
	uint64_t	s_ib_atomic_cswp;
	uint64_t	s_ib_atomic_fadd;
};

extern struct workqueue_struct *rds_ib_wq;

/*
 * Fake ib_dma_sync_sg_for_{cpu,device} as long as ib_verbs.h
 * doesn't define it.
 */
static inline void rds_ib_dma_sync_sg_for_cpu(struct ib_device *dev,
					      struct scatterlist *sglist,
					      unsigned int sg_dma_len,
					      int direction)
{
	struct scatterlist *sg;
	unsigned int i;

	for_each_sg(sglist, sg, sg_dma_len, i) {
		ib_dma_sync_single_for_cpu(dev,
				ib_sg_dma_address(dev, sg),
				ib_sg_dma_len(dev, sg),
				direction);
	}
}
#define ib_dma_sync_sg_for_cpu	rds_ib_dma_sync_sg_for_cpu

static inline void rds_ib_dma_sync_sg_for_device(struct ib_device *dev,
						 struct scatterlist *sglist,
						 unsigned int sg_dma_len,
						 int direction)
{
	struct scatterlist *sg;
	unsigned int i;

	for_each_sg(sglist, sg, sg_dma_len, i) {
		ib_dma_sync_single_for_device(dev,
				ib_sg_dma_address(dev, sg),
				ib_sg_dma_len(dev, sg),
				direction);
	}
}
#define ib_dma_sync_sg_for_device	rds_ib_dma_sync_sg_for_device


/* ib.c */
extern struct rds_transport rds_ib_transport;
struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device);
void rds_ib_dev_put(struct rds_ib_device *rds_ibdev);
extern struct ib_client rds_ib_client;

extern unsigned int fmr_message_size;
extern unsigned int rds_ib_retry_count;

extern spinlock_t ib_nodev_conns_lock;
extern struct list_head ib_nodev_conns;

/* ib_cm.c */
int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp);
void rds_ib_conn_free(void *arg);
int rds_ib_conn_connect(struct rds_connection *conn);
void rds_ib_conn_shutdown(struct rds_connection *conn);
void rds_ib_state_change(struct sock *sk);
int rds_ib_listen_init(void);
void rds_ib_listen_stop(void);
void __rds_ib_conn_error(struct rds_connection *conn, const char *, ...);
int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
			     struct rdma_cm_event *event);
int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id);
void rds_ib_cm_connect_complete(struct rds_connection *conn,
				struct rdma_cm_event *event);


#define rds_ib_conn_error(conn, fmt...) \
	__rds_ib_conn_error(conn, KERN_WARNING "RDS/IB: " fmt)

/* ib_rdma.c */
int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev, __be32 ipaddr);
void rds_ib_add_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
void rds_ib_remove_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
void rds_ib_destroy_nodev_conns(void);
struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *);
void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, struct rds_info_rdma_connection *iinfo);
void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *);
void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
		    struct rds_sock *rs, u32 *key_ret);
void rds_ib_sync_mr(void *trans_private, int dir);
void rds_ib_free_mr(void *trans_private, int invalidate);
void rds_ib_flush_mrs(void);

/* ib_recv.c */
int rds_ib_recv_init(void);
void rds_ib_recv_exit(void);
int rds_ib_recv(struct rds_connection *conn);
int rds_ib_recv_alloc_caches(struct rds_ib_connection *ic);
void rds_ib_recv_free_caches(struct rds_ib_connection *ic);
void rds_ib_recv_refill(struct rds_connection *conn, int prefill);
void rds_ib_inc_free(struct rds_incoming *inc);
int rds_ib_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);
void rds_ib_recv_cq_comp_handler(struct ib_cq *cq, void *context);
void rds_ib_recv_tasklet_fn(unsigned long data);
void rds_ib_recv_init_ring(struct rds_ib_connection *ic);
void rds_ib_recv_clear_ring(struct rds_ib_connection *ic);
void rds_ib_recv_init_ack(struct rds_ib_connection *ic);
void rds_ib_attempt_ack(struct rds_ib_connection *ic);
void rds_ib_ack_send_complete(struct rds_ib_connection *ic);
u64 rds_ib_piggyb_ack(struct rds_ib_connection *ic);

/* ib_ring.c */
void rds_ib_ring_init(struct rds_ib_work_ring *ring, u32 nr);
void rds_ib_ring_resize(struct rds_ib_work_ring *ring, u32 nr);
u32 rds_ib_ring_alloc(struct rds_ib_work_ring *ring, u32 val, u32 *pos);
void rds_ib_ring_free(struct rds_ib_work_ring *ring, u32 val);
void rds_ib_ring_unalloc(struct rds_ib_work_ring *ring, u32 val);
int rds_ib_ring_empty(struct rds_ib_work_ring *ring);
int rds_ib_ring_low(struct rds_ib_work_ring *ring);
u32 rds_ib_ring_oldest(struct rds_ib_work_ring *ring);
u32 rds_ib_ring_completed(struct rds_ib_work_ring *ring, u32 wr_id, u32 oldest);
extern wait_queue_head_t rds_ib_ring_empty_wait;

/* ib_send.c */
void rds_ib_xmit_complete(struct rds_connection *conn);
int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
		unsigned int hdr_off, unsigned int sg, unsigned int off);
void rds_ib_send_cq_comp_handler(struct ib_cq *cq, void *context);
void rds_ib_send_init_ring(struct rds_ib_connection *ic);
void rds_ib_send_clear_ring(struct rds_ib_connection *ic);
int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op);
void rds_ib_send_add_credits(struct rds_connection *conn, unsigned int credits);
void rds_ib_advertise_credits(struct rds_connection *conn, unsigned int posted);
int rds_ib_send_grab_credits(struct rds_ib_connection *ic, u32 wanted,
			     u32 *adv_credits, int need_posted, int max_posted);
int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op);

/* ib_stats.c */
DECLARE_PER_CPU(struct rds_ib_statistics, rds_ib_stats);
#define rds_ib_stats_inc(member) rds_stats_inc_which(rds_ib_stats, member)
unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
				    unsigned int avail);

/* ib_sysctl.c */
int rds_ib_sysctl_init(void);
void rds_ib_sysctl_exit(void);
extern unsigned long rds_ib_sysctl_max_send_wr;
extern unsigned long rds_ib_sysctl_max_recv_wr;
extern unsigned long rds_ib_sysctl_max_unsig_wrs;
extern unsigned long rds_ib_sysctl_max_unsig_bytes;
extern unsigned long rds_ib_sysctl_max_recv_allocation;
extern unsigned int rds_ib_sysctl_flow_control;

#endif
Commit	Line	Data
ec16227e AG	1	#ifndef _RDS_IB_H
	2	#define _RDS_IB_H
	3
	4	#include <rdma/ib_verbs.h>
	5	#include <rdma/rdma_cm.h>
a6b7a407	6	#include <linux/interrupt.h>
e4c52c98 AG	7	#include <linux/pci.h>
e4c52c98 AG	8	#include <linux/slab.h>
ec16227e AG	9	#include "rds.h"
	10	#include "rdma_transport.h"
	11
	12	#define RDS_FMR_SIZE 256
eabb7322	13	#define RDS_FMR_POOL_SIZE 8192
ec16227e AG	14
	15	#define RDS_IB_MAX_SGE 8
	16	#define RDS_IB_RECV_SGE 2
	17
	18	#define RDS_IB_DEFAULT_RECV_WR 1024
	19	#define RDS_IB_DEFAULT_SEND_WR 256
	20
3ba23ade AG	21	#define RDS_IB_DEFAULT_RETRY_COUNT 2
3ba23ade AG	22
ec16227e AG	23	#define RDS_IB_SUPPORTED_PROTOCOLS 0x00000003 /* minor versions supported */
ec16227e AG	24
33244125 CM	25	#define RDS_IB_RECYCLE_BATCH_COUNT 32
33244125 CM	26
ea819867	27	extern struct rw_semaphore rds_ib_devices_lock;
ec16227e AG	28	extern struct list_head rds_ib_devices;
	29
	30	/*
	31	* IB posts RDS_FRAG_SIZE fragments of pages to the receive queues to
	32	* try and minimize the amount of memory tied up both the device and
	33	* socket receive queues.
	34	*/
ec16227e AG	35	struct rds_page_frag {
ec16227e AG	36	struct list_head f_item;
33244125	37	struct list_head f_cache_entry;
0b088e00	38	struct scatterlist f_sg;
ec16227e AG	39	};
	40
	41	struct rds_ib_incoming {
	42	struct list_head ii_frags;
33244125	43	struct list_head ii_cache_entry;
ec16227e AG	44	struct rds_incoming ii_inc;
	45	};
	46
33244125 CM	47	struct rds_ib_cache_head {
	48	struct list_head *first;
	49	unsigned long count;
	50	};
	51
	52	struct rds_ib_refill_cache {
ae4b46e9	53	struct rds_ib_cache_head __percpu *percpu;
33244125 CM	54	struct list_head *xfer;
	55	struct list_head *ready;
	56	};
	57
ec16227e AG	58	struct rds_ib_connect_private {
	59	/* Add new fields at the end, and don't permute existing fields. */
	60	__be32 dp_saddr;
	61	__be32 dp_daddr;
	62	u8 dp_protocol_major;
	63	u8 dp_protocol_minor;
	64	__be16 dp_protocol_minor_mask; /* bitmask */
	65	__be32 dp_reserved1;
	66	__be64 dp_ack_seq;
	67	__be32 dp_credit; /* non-zero enables flow ctl */
	68	};
	69
	70	struct rds_ib_send_work {
ff3d7d36	71	void *s_op;
ec16227e AG	72	struct ib_send_wr s_wr;
	73	struct ib_sge s_sge[RDS_IB_MAX_SGE];
	74	unsigned long s_queued;
	75	};
	76
	77	struct rds_ib_recv_work {
	78	struct rds_ib_incoming *r_ibinc;
	79	struct rds_page_frag *r_frag;
	80	struct ib_recv_wr r_wr;
	81	struct ib_sge r_sge[2];
	82	};
	83
	84	struct rds_ib_work_ring {
	85	u32 w_nr;
	86	u32 w_alloc_ptr;
	87	u32 w_alloc_ctr;
	88	u32 w_free_ptr;
	89	atomic_t w_free_ctr;
	90	};
	91
	92	struct rds_ib_device;
	93
	94	struct rds_ib_connection {
	95
	96	struct list_head ib_node;
	97	struct rds_ib_device *rds_ibdev;
	98	struct rds_connection *conn;
	99
	100	/* alphabet soup, IBTA style */
	101	struct rdma_cm_id *i_cm_id;
	102	struct ib_pd *i_pd;
	103	struct ib_mr *i_mr;
	104	struct ib_cq *i_send_cq;
	105	struct ib_cq *i_recv_cq;
	106
	107	/* tx */
	108	struct rds_ib_work_ring i_send_ring;
ff3d7d36	109	struct rm_data_op *i_data_op;
ec16227e AG	110	struct rds_header *i_send_hdrs;
	111	u64 i_send_hdrs_dma;
	112	struct rds_ib_send_work *i_sends;
f046011c	113	atomic_t i_signaled_sends;
ec16227e AG	114
ec16227e AG	115	/* rx */
d521b63b	116	struct tasklet_struct i_recv_tasklet;
ec16227e AG	117	struct mutex i_recv_mutex;
	118	struct rds_ib_work_ring i_recv_ring;
	119	struct rds_ib_incoming *i_ibinc;
	120	u32 i_recv_data_rem;
	121	struct rds_header *i_recv_hdrs;
	122	u64 i_recv_hdrs_dma;
	123	struct rds_ib_recv_work *i_recvs;
ec16227e	124	u64 i_ack_recv; /* last ACK received */
33244125 CM	125	struct rds_ib_refill_cache i_cache_incs;
33244125 CM	126	struct rds_ib_refill_cache i_cache_frags;
ec16227e AG	127
	128	/* sending acks */
	129	unsigned long i_ack_flags;
8cbd9606 AG	130	#ifdef KERNEL_HAS_ATOMIC64
	131	atomic64_t i_ack_next; /* next ACK to send */
	132	#else
	133	spinlock_t i_ack_lock; /* protect i_ack_next */
ec16227e	134	u64 i_ack_next; /* next ACK to send */
8cbd9606	135	#endif
ec16227e AG	136	struct rds_header *i_ack;
	137	struct ib_send_wr i_ack_wr;
	138	struct ib_sge i_ack_sge;
	139	u64 i_ack_dma;
	140	unsigned long i_ack_queued;
	141
	142	/* Flow control related information
	143	*
	144	* Our algorithm uses a pair variables that we need to access
	145	* atomically - one for the send credits, and one posted
	146	* recv credits we need to transfer to remote.
	147	* Rather than protect them using a slow spinlock, we put both into
	148	* a single atomic_t and update it using cmpxchg
	149	*/
	150	atomic_t i_credits;
	151
	152	/* Protocol version specific information */
	153	unsigned int i_flowctl:1; /* enable/disable flow ctl */
	154
	155	/* Batched completions */
	156	unsigned int i_unsignaled_wrs;
ec16227e AG	157	};
	158
	159	/* This assumes that atomic_t is at least 32 bits */
	160	#define IB_GET_SEND_CREDITS(v) ((v) & 0xffff)
	161	#define IB_GET_POST_CREDITS(v) ((v) >> 16)
	162	#define IB_SET_SEND_CREDITS(v) ((v) & 0xffff)
	163	#define IB_SET_POST_CREDITS(v) ((v) << 16)
	164
	165	struct rds_ib_ipaddr {
	166	struct list_head list;
	167	__be32 ipaddr;
	168	};
	169
	170	struct rds_ib_device {
	171	struct list_head list;
	172	struct list_head ipaddr_list;
	173	struct list_head conn_list;
	174	struct ib_device *dev;
	175	struct ib_pd *pd;
	176	struct ib_mr *mr;
	177	struct rds_ib_mr_pool *mr_pool;
ec16227e AG	178	unsigned int fmr_max_remaps;
	179	unsigned int max_fmrs;
	180	int max_sge;
	181	unsigned int max_wrs;
40589e74 AG	182	unsigned int max_initiator_depth;
40589e74 AG	183	unsigned int max_responder_resources;
ec16227e	184	spinlock_t spinlock; /* protect the above */
3e0249f9 ZB	185	atomic_t refcount;
3e0249f9 ZB	186	struct work_struct free_work;
ec16227e AG	187	};
ec16227e AG	188
a0c6ffbc	189	#define ibdev_to_node(ibdev) dev_to_node(ibdev->dma_device)
e4c52c98 AG	190	#define rdsibdev_to_node(rdsibdev) ibdev_to_node(rdsibdev->dev)
e4c52c98 AG	191
ec16227e AG	192	/* bits for i_ack_flags */
	193	#define IB_ACK_IN_FLIGHT 0
	194	#define IB_ACK_REQUESTED 1
	195
	196	/* Magic WR_ID for ACKs */
	197	#define RDS_IB_ACK_WR_ID (~(u64) 0)
	198
	199	struct rds_ib_statistics {
	200	uint64_t s_ib_connect_raced;
	201	uint64_t s_ib_listen_closed_stale;
	202	uint64_t s_ib_tx_cq_call;
	203	uint64_t s_ib_tx_cq_event;
	204	uint64_t s_ib_tx_ring_full;
	205	uint64_t s_ib_tx_throttle;
	206	uint64_t s_ib_tx_sg_mapping_failure;
	207	uint64_t s_ib_tx_stalled;
	208	uint64_t s_ib_tx_credit_updates;
	209	uint64_t s_ib_rx_cq_call;
	210	uint64_t s_ib_rx_cq_event;
	211	uint64_t s_ib_rx_ring_empty;
	212	uint64_t s_ib_rx_refill_from_cq;
	213	uint64_t s_ib_rx_refill_from_thread;
	214	uint64_t s_ib_rx_alloc_limit;
	215	uint64_t s_ib_rx_credit_updates;
	216	uint64_t s_ib_ack_sent;
	217	uint64_t s_ib_ack_send_failure;
	218	uint64_t s_ib_ack_send_delayed;
	219	uint64_t s_ib_ack_send_piggybacked;
	220	uint64_t s_ib_ack_received;
	221	uint64_t s_ib_rdma_mr_alloc;
	222	uint64_t s_ib_rdma_mr_free;
	223	uint64_t s_ib_rdma_mr_used;
	224	uint64_t s_ib_rdma_mr_pool_flush;
	225	uint64_t s_ib_rdma_mr_pool_wait;
	226	uint64_t s_ib_rdma_mr_pool_depleted;
51e2cba8 AG	227	uint64_t s_ib_atomic_cswp;
51e2cba8 AG	228	uint64_t s_ib_atomic_fadd;
ec16227e AG	229	};
	230
	231	extern struct workqueue_struct *rds_ib_wq;
	232
	233	/*
	234	* Fake ib_dma_sync_sg_for_{cpu,device} as long as ib_verbs.h
	235	* doesn't define it.
	236	*/
	237	static inline void rds_ib_dma_sync_sg_for_cpu(struct ib_device *dev,
d2a9ec64 FF	238	struct scatterlist *sglist,
	239	unsigned int sg_dma_len,
	240	int direction)
ec16227e	241	{
d2a9ec64	242	struct scatterlist *sg;
ec16227e AG	243	unsigned int i;
ec16227e AG	244
d2a9ec64	245	for_each_sg(sglist, sg, sg_dma_len, i) {
ec16227e	246	ib_dma_sync_single_for_cpu(dev,
d2a9ec64 FF	247	ib_sg_dma_address(dev, sg),
d2a9ec64 FF	248	ib_sg_dma_len(dev, sg),
ec16227e AG	249	direction);
	250	}
	251	}
	252	#define ib_dma_sync_sg_for_cpu rds_ib_dma_sync_sg_for_cpu
	253
	254	static inline void rds_ib_dma_sync_sg_for_device(struct ib_device *dev,
d2a9ec64 FF	255	struct scatterlist *sglist,
	256	unsigned int sg_dma_len,
	257	int direction)
ec16227e	258	{
d2a9ec64	259	struct scatterlist *sg;
ec16227e AG	260	unsigned int i;
ec16227e AG	261
d2a9ec64	262	for_each_sg(sglist, sg, sg_dma_len, i) {
ec16227e	263	ib_dma_sync_single_for_device(dev,
d2a9ec64 FF	264	ib_sg_dma_address(dev, sg),
d2a9ec64 FF	265	ib_sg_dma_len(dev, sg),
ec16227e AG	266	direction);
	267	}
	268	}
	269	#define ib_dma_sync_sg_for_device rds_ib_dma_sync_sg_for_device
	270
	271
	272	/* ib.c */
	273	extern struct rds_transport rds_ib_transport;
3e0249f9 ZB	274	struct rds_ib_device rds_ib_get_client_data(struct ib_device device);
3e0249f9 ZB	275	void rds_ib_dev_put(struct rds_ib_device *rds_ibdev);
ec16227e AG	276	extern struct ib_client rds_ib_client;
ec16227e AG	277
ec16227e	278	extern unsigned int fmr_message_size;
3ba23ade	279	extern unsigned int rds_ib_retry_count;
ec16227e AG	280
	281	extern spinlock_t ib_nodev_conns_lock;
	282	extern struct list_head ib_nodev_conns;
	283
	284	/* ib_cm.c */
	285	int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp);
	286	void rds_ib_conn_free(void *arg);
	287	int rds_ib_conn_connect(struct rds_connection *conn);
	288	void rds_ib_conn_shutdown(struct rds_connection *conn);
	289	void rds_ib_state_change(struct sock *sk);
ef87b7ea	290	int rds_ib_listen_init(void);
ec16227e AG	291	void rds_ib_listen_stop(void);
	292	void __rds_ib_conn_error(struct rds_connection conn, const char , ...);
	293	int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
	294	struct rdma_cm_event *event);
	295	int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id);
	296	void rds_ib_cm_connect_complete(struct rds_connection *conn,
	297	struct rdma_cm_event *event);
	298
	299
	300	#define rds_ib_conn_error(conn, fmt...) \
	301	__rds_ib_conn_error(conn, KERN_WARNING "RDS/IB: " fmt)
	302
	303	/* ib_rdma.c */
	304	int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev, __be32 ipaddr);
745cbcca AG	305	void rds_ib_add_conn(struct rds_ib_device rds_ibdev, struct rds_connection conn);
745cbcca AG	306	void rds_ib_remove_conn(struct rds_ib_device rds_ibdev, struct rds_connection conn);
8aeb1ba6	307	void rds_ib_destroy_nodev_conns(void);
ec16227e AG	308	struct rds_ib_mr_pool rds_ib_create_mr_pool(struct rds_ib_device );
	309	void rds_ib_get_mr_info(struct rds_ib_device rds_ibdev, struct rds_info_rdma_connection iinfo);
	310	void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *);
	311	void rds_ib_get_mr(struct scatterlist sg, unsigned long nents,
	312	struct rds_sock rs, u32 key_ret);
	313	void rds_ib_sync_mr(void *trans_private, int dir);
	314	void rds_ib_free_mr(void *trans_private, int invalidate);
	315	void rds_ib_flush_mrs(void);
	316
	317	/* ib_recv.c */
ef87b7ea	318	int rds_ib_recv_init(void);
ec16227e AG	319	void rds_ib_recv_exit(void);
ec16227e AG	320	int rds_ib_recv(struct rds_connection *conn);
33244125 CM	321	int rds_ib_recv_alloc_caches(struct rds_ib_connection *ic);
33244125 CM	322	void rds_ib_recv_free_caches(struct rds_ib_connection *ic);
b6fb0df1	323	void rds_ib_recv_refill(struct rds_connection *conn, int prefill);
ec16227e	324	void rds_ib_inc_free(struct rds_incoming *inc);
c310e72c	325	int rds_ib_inc_copy_to_user(struct rds_incoming inc, struct iov_iter to);
ec16227e	326	void rds_ib_recv_cq_comp_handler(struct ib_cq cq, void context);
d521b63b	327	void rds_ib_recv_tasklet_fn(unsigned long data);
ec16227e AG	328	void rds_ib_recv_init_ring(struct rds_ib_connection *ic);
	329	void rds_ib_recv_clear_ring(struct rds_ib_connection *ic);
	330	void rds_ib_recv_init_ack(struct rds_ib_connection *ic);
	331	void rds_ib_attempt_ack(struct rds_ib_connection *ic);
	332	void rds_ib_ack_send_complete(struct rds_ib_connection *ic);
	333	u64 rds_ib_piggyb_ack(struct rds_ib_connection *ic);
	334
	335	/* ib_ring.c */
	336	void rds_ib_ring_init(struct rds_ib_work_ring *ring, u32 nr);
	337	void rds_ib_ring_resize(struct rds_ib_work_ring *ring, u32 nr);
	338	u32 rds_ib_ring_alloc(struct rds_ib_work_ring ring, u32 val, u32 pos);
	339	void rds_ib_ring_free(struct rds_ib_work_ring *ring, u32 val);
	340	void rds_ib_ring_unalloc(struct rds_ib_work_ring *ring, u32 val);
	341	int rds_ib_ring_empty(struct rds_ib_work_ring *ring);
	342	int rds_ib_ring_low(struct rds_ib_work_ring *ring);
	343	u32 rds_ib_ring_oldest(struct rds_ib_work_ring *ring);
	344	u32 rds_ib_ring_completed(struct rds_ib_work_ring *ring, u32 wr_id, u32 oldest);
	345	extern wait_queue_head_t rds_ib_ring_empty_wait;
	346
	347	/* ib_send.c */
	348	void rds_ib_xmit_complete(struct rds_connection *conn);
	349	int rds_ib_xmit(struct rds_connection conn, struct rds_message rm,
	350	unsigned int hdr_off, unsigned int sg, unsigned int off);
	351	void rds_ib_send_cq_comp_handler(struct ib_cq cq, void context);
	352	void rds_ib_send_init_ring(struct rds_ib_connection *ic);
	353	void rds_ib_send_clear_ring(struct rds_ib_connection *ic);
f8b3aaf2	354	int rds_ib_xmit_rdma(struct rds_connection conn, struct rm_rdma_op op);
ec16227e AG	355	void rds_ib_send_add_credits(struct rds_connection *conn, unsigned int credits);
	356	void rds_ib_advertise_credits(struct rds_connection *conn, unsigned int posted);
	357	int rds_ib_send_grab_credits(struct rds_ib_connection *ic, u32 wanted,
7b70d033	358	u32 *adv_credits, int need_posted, int max_posted);
ff3d7d36	359	int rds_ib_xmit_atomic(struct rds_connection conn, struct rm_atomic_op op);
ec16227e AG	360
	361	/* ib_stats.c */
	362	DECLARE_PER_CPU(struct rds_ib_statistics, rds_ib_stats);
	363	#define rds_ib_stats_inc(member) rds_stats_inc_which(rds_ib_stats, member)
	364	unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
	365	unsigned int avail);
	366
	367	/* ib_sysctl.c */
ef87b7ea	368	int rds_ib_sysctl_init(void);
ec16227e AG	369	void rds_ib_sysctl_exit(void);
	370	extern unsigned long rds_ib_sysctl_max_send_wr;
	371	extern unsigned long rds_ib_sysctl_max_recv_wr;
	372	extern unsigned long rds_ib_sysctl_max_unsig_wrs;
	373	extern unsigned long rds_ib_sysctl_max_unsig_bytes;
	374	extern unsigned long rds_ib_sysctl_max_recv_allocation;
	375	extern unsigned int rds_ib_sysctl_flow_control;
ec16227e	376
ec16227e	377	#endif