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linux/net/rds/ib.h
Linus Torvalds e0456717e4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 
Pull networking updates from David Miller:

 1) Add TX fast path in mac80211, from Johannes Berg.

 2) Add TSO/GRO support to ibmveth, from Thomas Falcon

 3) Move away from cached routes in ipv6, just like ipv4, from Martin
    KaFai Lau.

 4) Lots of new rhashtable tests, from Thomas Graf.

 5) Run ingress qdisc lockless, from Alexei Starovoitov.

 6) Allow servers to fetch TCP packet headers for SYN packets of new
    connections, for fingerprinting.  From Eric Dumazet.

 7) Add mode parameter to pktgen, for testing receive.  From Alexei
    Starovoitov.

 8) Cache access optimizations via simplifications of build_skb(), from
    Alexander Duyck.

 9) Move page frag allocator under mm/, also from Alexander.

10) Add xmit_more support to hv_netvsc, from KY Srinivasan.

11) Add a counter guard in case we try to perform endless reclassify
    loops in the packet scheduler.

12) Extern flow dissector to be programmable and use it in new "Flower"
    classifier.  From Jiri Pirko.

13) AF_PACKET fanout rollover fixes, performance improvements, and new
    statistics.  From Willem de Bruijn.

14) Add netdev driver for GENEVE tunnels, from John W Linville.

15) Add ingress netfilter hooks and filtering, from Pablo Neira Ayuso.

16) Fix handling of epoll edge triggers in TCP, from Eric Dumazet.

17) Add an ECN retry fallback for the initial TCP handshake, from Daniel
    Borkmann.

18) Add tail call support to BPF, from Alexei Starovoitov.

19) Add several pktgen helper scripts, from Jesper Dangaard Brouer.

20) Add zerocopy support to AF_UNIX, from Hannes Frederic Sowa.

21) Favor even port numbers for allocation to connect() requests, and
    odd port numbers for bind(0), in an effort to help avoid
    ip_local_port_range exhaustion.  From Eric Dumazet.

22) Add Cavium ThunderX driver, from Sunil Goutham.

23) Allow bpf programs to access skb_iif and dev->ifindex SKB metadata,
    from Alexei Starovoitov.

24) Add support for T6 chips in cxgb4vf driver, from Hariprasad Shenai.

25) Double TCP Small Queues default to 256K to accomodate situations
    like the XEN driver and wireless aggregation.  From Wei Liu.

26) Add more entropy inputs to flow dissector, from Tom Herbert.

27) Add CDG congestion control algorithm to TCP, from Kenneth Klette
    Jonassen.

28) Convert ipset over to RCU locking, from Jozsef Kadlecsik.

29) Track and act upon link status of ipv4 route nexthops, from Andy
    Gospodarek.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1670 commits)
  bridge: vlan: flush the dynamically learned entries on port vlan delete
  bridge: multicast: add a comment to br_port_state_selection about blocking state
  net: inet_diag: export IPV6_V6ONLY sockopt
  stmmac: troubleshoot unexpected bits in des0 & des1
  net: ipv4 sysctl option to ignore routes when nexthop link is down
  net: track link-status of ipv4 nexthops
  net: switchdev: ignore unsupported bridge flags
  net: Cavium: Fix MAC address setting in shutdown state
  drivers: net: xgene: fix for ACPI support without ACPI
  ip: report the original address of ICMP messages
  net/mlx5e: Prefetch skb data on RX
  net/mlx5e: Pop cq outside mlx5e_get_cqe
  net/mlx5e: Remove mlx5e_cq.sqrq back-pointer
  net/mlx5e: Remove extra spaces
  net/mlx5e: Avoid TX CQE generation if more xmit packets expected
  net/mlx5e: Avoid redundant dev_kfree_skb() upon NOP completion
  net/mlx5e: Remove re-assignment of wq type in mlx5e_enable_rq()
  net/mlx5e: Use skb_shinfo(skb)->gso_segs rather than counting them
  net/mlx5e: Static mapping of netdev priv resources to/from netdev TX queues
  net/mlx4_en: Use HW counters for rx/tx bytes/packets in PF device
  ...
2015-06-24 16:49:49 -07:00

378 lines
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#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
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