/* * This file contains definitions imported from the OFED rds header ib.h. * Oracle elects to have and use the contents of ib.h under and * governed by the OpenIB.org BSD license. */ /* * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. */ #ifndef _RDSV3_IB_H #define _RDSV3_IB_H #include #include #include #include #define RDSV3_FMR_SIZE 256 #define RDSV3_FMR_POOL_SIZE (12 * 1024) #define RDSV3_IB_MAX_SGE 8 #define RDSV3_IB_RECV_SGE 2 #define RDSV3_IB_DEFAULT_RECV_WR 1024 #define RDSV3_IB_DEFAULT_SEND_WR 256 #define RDSV3_IB_DEFAULT_RETRY_COUNT 2 /* minor versions supported */ #define RDSV3_IB_SUPPORTED_PROTOCOLS 0x00000003 #define RDSV3_IB_MAX_RECV_ALLOC ((512 * 1024 * 1024) / RDSV3_FRAG_SIZE) #define RDSV3_IB_WC_POLL_SIZE 16 extern struct list rdsv3_ib_devices; /* * IB posts RDSV3_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. */ /* page offset of the final full frag that fits in the page */ #define RDSV3_PAGE_LAST_OFF \ (((PAGE_SIZE / RDSV3_FRAG_SIZE) - 1) * RDSV3_FRAG_SIZE) struct rdsv3_page_frag { struct list_node f_item; caddr_t f_page; unsigned long f_offset; ibt_wr_ds_t f_sge; ibt_mi_hdl_t f_mapped; }; struct rdsv3_ib_incoming { list_node_t ii_obj; /* list obj of rdsv3_inc_pool list */ struct list ii_frags; struct rdsv3_incoming ii_inc; struct rdsv3_inc_pool *ii_pool; struct rdsv3_ib_device *ii_ibdev; }; struct rdsv3_ib_connect_private { /* Add new fields at the end, and don't permute existing fields. */ uint32_be_t dp_saddr; uint32_be_t dp_daddr; uint8_t dp_protocol_major; uint8_t dp_protocol_minor; uint16_be_t dp_protocol_minor_mask; /* bitmask */ uint32_be_t dp_reserved1; uint32_be_t dp_ack_seq; uint32_be_t dp_credit; /* non-zero enables flow ctl */ }; struct rdsv3_ib_send_work { struct rdsv3_message *s_rm; struct rdsv3_rdma_op *s_op; ibt_wrc_opcode_t s_opcode; unsigned long s_queued; }; struct rdsv3_ib_recv_work { struct rdsv3_ib_incoming *r_ibinc; struct rdsv3_page_frag *r_frag; ibt_wr_ds_t r_sge[2]; }; struct rdsv3_ib_work_ring { uint32_t w_nr; uint32_t w_alloc_ptr; uint32_t w_alloc_ctr; uint32_t w_free_ptr; atomic_t w_free_ctr; rdsv3_wait_queue_t w_empty_wait; }; /* * Rings are posted with all the allocations they'll need to queue the * incoming message to the receiving socket so this can't fail. * All fragments start with a header, so we can make sure we're not receiving * garbage, and we can tell a small 8 byte fragment from an ACK frame. */ struct rdsv3_ib_ack_state { uint64_t ack_next; uint64_t ack_recv; unsigned int ack_required:1; unsigned int ack_next_valid:1; unsigned int ack_recv_valid:1; }; struct rdsv3_ib_device; struct rdsv3_ib_connection { struct list_node ib_node; boolean_t i_on_dev_list; struct rdsv3_ib_device *rds_ibdev; struct rdsv3_connection *conn; /* alphabet soup, IBTA style */ struct rdma_cm_id *i_cm_id; struct ib_pd *i_pd; struct rdsv3_hdrs_mr *i_mr; struct ib_cq *i_cq; struct ib_cq *i_snd_cq; /* tx */ struct rdsv3_ib_work_ring i_send_ring; struct rdsv3_message *i_rm; struct rdsv3_header *i_send_hdrs; uint64_t i_send_hdrs_dma; struct rdsv3_ib_send_work *i_sends; ibt_send_wr_t *i_send_wrs; /* soft CQ */ rdsv3_af_thr_t *i_soft_cq; rdsv3_af_thr_t *i_snd_soft_cq; rdsv3_af_thr_t *i_refill_rq; /* rx */ struct mutex i_recv_mutex; struct rdsv3_ib_work_ring i_recv_ring; struct rdsv3_ib_incoming *i_ibinc; uint32_t i_recv_data_rem; struct rdsv3_header *i_recv_hdrs; uint64_t i_recv_hdrs_dma; struct rdsv3_ib_recv_work *i_recvs; ibt_recv_wr_t *i_recv_wrs; struct rdsv3_page_frag i_frag; uint64_t i_ack_recv; /* last ACK received */ /* sending acks */ unsigned long i_ack_flags; #ifdef KERNEL_HAS_ATOMIC64 atomic64_t i_ack_next; /* next ACK to send */ #else kmutex_t i_ack_lock; /* protect i_ack_next */ uint64_t i_ack_next; /* next ACK to send */ #endif struct rdsv3_header *i_ack; ibt_send_wr_t i_ack_wr; ibt_wr_ds_t i_ack_sge; uint64_t 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; long i_unsignaled_bytes; unsigned long i_max_recv_alloc; }; /* 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 rdsv3_ib_ipaddr { struct list_node list; uint32_be_t ipaddr; }; struct rdsv3_ib_device { struct list_node list; struct list ipaddr_list; struct list conn_list; ib_device_t *dev; struct ib_pd *pd; struct kmem_cache *ib_frag_slab; kmutex_t spinlock; /* protect the above */ krwlock_t rwlock; /* protect paddr_list */ unsigned int fmr_max_remaps; unsigned int max_fmrs; unsigned int fmr_message_size; int max_sge; unsigned int max_wrs; unsigned int max_initiator_depth; unsigned int max_responder_resources; struct rdsv3_fmr_pool *fmr_pool; struct rdsv3_inc_pool *inc_pool; ibt_fmr_pool_hdl_t fmr_pool_hdl; ibt_hca_attr_t hca_attr; rdsv3_af_thr_t *fmr_soft_cq; rdsv3_af_thr_t *inc_soft_cq; ibt_hca_hdl_t ibt_hca_hdl; rdsv3_af_grp_t *aft_hcagp; }; /* bits for i_ack_flags */ #define IB_ACK_IN_FLIGHT 0 #define IB_ACK_REQUESTED 1 #define RDSV3_IB_SEND_OP (1ULL << 63) /* Magic WR_ID for ACKs */ #define RDSV3_IB_ACK_WR_ID (~(uint64_t)0) struct rdsv3_ib_statistics { uint64_t s_ib_connect_raced; uint64_t s_ib_listen_closed_stale; uint64_t s_ib_evt_handler_call; uint64_t s_ib_tasklet_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_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; }; extern struct rdsv3_workqueue_struct_s *rds_ib_wq; /* ib.c */ extern struct rdsv3_transport rdsv3_ib_transport; extern void rdsv3_ib_add_one(ib_device_t *device); extern void rdsv3_ib_remove_one(ib_device_t *device); extern struct ib_client rdsv3_ib_client; extern unsigned int fmr_pool_size; extern unsigned int fmr_message_size; extern unsigned int rdsv3_ib_retry_count; extern kmutex_t ib_nodev_conns_lock; extern struct list ib_nodev_conns; /* ib_cm.c */ int rdsv3_ib_conn_alloc(struct rdsv3_connection *conn, int gfp); void rdsv3_ib_conn_free(void *arg); int rdsv3_ib_conn_connect(struct rdsv3_connection *conn); void rdsv3_ib_conn_shutdown(struct rdsv3_connection *conn); void rdsv3_conn_drop(struct rdsv3_connection *conn); int rdsv3_ib_cm_handle_connect(struct rdma_cm_id *cm_id, struct rdma_cm_event *event); int rdsv3_ib_cm_initiate_connect(struct rdma_cm_id *cm_id); void rdsv3_ib_cm_connect_complete(struct rdsv3_connection *conn, struct rdma_cm_event *event); void rdsv3_ib_tasklet_fn(void *data); void rdsv3_ib_snd_tasklet_fn(void *data); void rdsv3_ib_refill_fn(void *data); /* ib_rdma.c */ int rdsv3_ib_update_ipaddr(struct rdsv3_ib_device *rds_ibdev, uint32_be_t ipaddr); void rdsv3_ib_add_conn(struct rdsv3_ib_device *rds_ibdev, struct rdsv3_connection *conn); void rdsv3_ib_remove_conn(struct rdsv3_ib_device *rds_ibdev, struct rdsv3_connection *conn); void __rdsv3_ib_destroy_conns(struct list *list, kmutex_t *list_lock); static inline void rdsv3_ib_destroy_nodev_conns(void) { __rdsv3_ib_destroy_conns(&ib_nodev_conns, &ib_nodev_conns_lock); } static inline void rdsv3_ib_destroy_conns(struct rdsv3_ib_device *rds_ibdev) { __rdsv3_ib_destroy_conns(&rds_ibdev->conn_list, &rds_ibdev->spinlock); } int rdsv3_ib_create_mr_pool(struct rdsv3_ib_device *); void rdsv3_ib_destroy_mr_pool(struct rdsv3_ib_device *); void rdsv3_ib_get_mr_info(struct rdsv3_ib_device *rds_ibdev, struct rds_info_rdma_connection *iinfo); void *rdsv3_ib_get_mr(struct rds_iovec *args, unsigned long nents, struct rdsv3_sock *rs, uint32_t *key_ret); void rdsv3_ib_sync_mr(void *trans_private, int dir); void rdsv3_ib_free_mr(void *trans_private, int invalidate); void rdsv3_ib_flush_mrs(void); void rdsv3_ib_drain_mrlist_fn(void *data); /* ib_recv.c */ int rdsv3_ib_recv_init(void); void rdsv3_ib_recv_exit(void); int rdsv3_ib_recv(struct rdsv3_connection *conn); int rdsv3_ib_recv_refill(struct rdsv3_connection *conn, int prefill); void rdsv3_ib_inc_free(struct rdsv3_incoming *inc); int rdsv3_ib_inc_copy_to_user(struct rdsv3_incoming *inc, uio_t *uiop, size_t size); void rdsv3_ib_recv_cqe_handler(struct rdsv3_ib_connection *ic, ibt_wc_t *wc, struct rdsv3_ib_ack_state *state); void rdsv3_ib_recv_init_ring(struct rdsv3_ib_connection *ic); void rdsv3_ib_recv_clear_ring(struct rdsv3_ib_connection *ic); void rdsv3_ib_recv_init_ack(struct rdsv3_ib_connection *ic); void rdsv3_ib_attempt_ack(struct rdsv3_ib_connection *ic); void rdsv3_ib_ack_send_complete(struct rdsv3_ib_connection *ic); uint64_t rdsv3_ib_piggyb_ack(struct rdsv3_ib_connection *ic); void rdsv3_ib_set_ack(struct rdsv3_ib_connection *ic, uint64_t seq, int ack_required); int rdsv3_ib_create_inc_pool(struct rdsv3_ib_device *); void rdsv3_ib_destroy_inc_pool(struct rdsv3_ib_device *); void rdsv3_ib_drain_inclist(void *); /* ib_ring.c */ void rdsv3_ib_ring_init(struct rdsv3_ib_work_ring *ring, uint32_t nr); void rdsv3_ib_ring_resize(struct rdsv3_ib_work_ring *ring, uint32_t nr); uint32_t rdsv3_ib_ring_alloc(struct rdsv3_ib_work_ring *ring, uint32_t val, uint32_t *pos); void rdsv3_ib_ring_free(struct rdsv3_ib_work_ring *ring, uint32_t val); void rdsv3_ib_ring_unalloc(struct rdsv3_ib_work_ring *ring, uint32_t val); int rdsv3_ib_ring_empty(struct rdsv3_ib_work_ring *ring); int rdsv3_ib_ring_low(struct rdsv3_ib_work_ring *ring); uint32_t rdsv3_ib_ring_oldest(struct rdsv3_ib_work_ring *ring); uint32_t rdsv3_ib_ring_completed(struct rdsv3_ib_work_ring *ring, uint32_t wr_id, uint32_t oldest); /* ib_send.c */ void rdsv3_ib_xmit_complete(struct rdsv3_connection *conn); int rdsv3_ib_xmit(struct rdsv3_connection *conn, struct rdsv3_message *rm, unsigned int hdr_off, unsigned int sg, unsigned int off); void rdsv3_ib_send_cqe_handler(struct rdsv3_ib_connection *ic, ibt_wc_t *wc); void rdsv3_ib_send_init_ring(struct rdsv3_ib_connection *ic); void rdsv3_ib_send_clear_ring(struct rdsv3_ib_connection *ic); int rdsv3_ib_xmit_rdma(struct rdsv3_connection *conn, struct rdsv3_rdma_op *op); void rdsv3_ib_send_add_credits(struct rdsv3_connection *conn, unsigned int credits); void rdsv3_ib_advertise_credits(struct rdsv3_connection *conn, unsigned int posted); int rdsv3_ib_send_grab_credits(struct rdsv3_ib_connection *ic, uint32_t wanted, uint32_t *adv_credits, int need_posted); /* ib_stats.c */ extern struct rdsv3_ib_statistics *rdsv3_ib_stats; #define rdsv3_ib_stats_inc(member) \ rdsv3_stats_add_which(rdsv3_ib_stats, member, 1) unsigned int rdsv3_ib_stats_info_copy(struct rdsv3_info_iterator *iter, unsigned int avail); /* ib_sysctl.c */ int rdsv3_ib_sysctl_init(void); void rdsv3_ib_sysctl_exit(void); extern unsigned long rdsv3_ib_sysctl_max_send_wr; extern unsigned long rdsv3_ib_sysctl_max_recv_wr; extern unsigned long rdsv3_ib_sysctl_max_unsig_wrs; extern unsigned long rdsv3_ib_sysctl_max_unsig_bytes; extern unsigned long rdsv3_ib_sysctl_max_recv_allocation; extern unsigned int rdsv3_ib_sysctl_flow_control; #endif /* _RDSV3_IB_H */