/* SPDX-License-Identifier: GPL-2.0 */ #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_IB_MAX_SGE … #define RDS_IB_RECV_SGE … #define RDS_IB_DEFAULT_RECV_WR … #define RDS_IB_DEFAULT_SEND_WR … #define RDS_IB_DEFAULT_FR_WR … #define RDS_IB_DEFAULT_RETRY_COUNT … #define RDS_IB_SUPPORTED_PROTOCOLS … #define RDS_IB_RECYCLE_BATCH_COUNT … #define RDS_IB_WC_MAX … 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 rds_ib_incoming { … }; struct rds_ib_cache_head { … }; struct rds_ib_refill_cache { … }; /* This is the common structure for the IB private data exchange in setting up * an RDS connection. The exchange is different for IPv4 and IPv6 connections. * The reason is that the address size is different and the addresses * exchanged are in the beginning of the structure. Hence it is not possible * for interoperability if same structure is used. */ struct rds_ib_conn_priv_cmn { … }; struct rds_ib_connect_private { … }; struct rds6_ib_connect_private { … }; #define dp_protocol_major … #define dp_protocol_minor … #define dp_protocol_minor_mask … #define dp_ack_seq … #define dp_credit … rds_ib_conn_priv; struct rds_ib_send_work { … }; struct rds_ib_recv_work { … }; struct rds_ib_work_ring { … }; /* 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 rds_ib_ack_state { … }; struct rds_ib_device; struct rds_ib_connection { … }; /* This assumes that atomic_t is at least 32 bits */ #define IB_GET_SEND_CREDITS(v) … #define IB_GET_POST_CREDITS(v) … #define IB_SET_SEND_CREDITS(v) … #define IB_SET_POST_CREDITS(v) … struct rds_ib_ipaddr { … }; enum { … }; struct rds_ib_device { … }; #define rdsibdev_to_node(rdsibdev) … /* bits for i_ack_flags */ #define IB_ACK_IN_FLIGHT … #define IB_ACK_REQUESTED … /* Magic WR_ID for ACKs */ #define RDS_IB_ACK_WR_ID … struct rds_ib_statistics { … }; 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) { … } #define 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) { … } #define 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 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_path_connect(struct rds_conn_path *cp); void rds_ib_conn_path_shutdown(struct rds_conn_path *cp); void rds_ib_state_change(struct sock *sk); int rds_ib_listen_init(void); void rds_ib_listen_stop(void); __printf(2, 3) 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, bool isv6); int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id, bool isv6); void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_event *event); #define rds_ib_conn_error(conn, fmt...) … /* ib_rdma.c */ int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev, struct in6_addr *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); void rds_ib_mr_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc); /* ib_recv.c */ int rds_ib_recv_init(void); void rds_ib_recv_exit(void); int rds_ib_recv_path(struct rds_conn_path *conn); int rds_ib_recv_alloc_caches(struct rds_ib_connection *ic, gfp_t gfp); void rds_ib_recv_free_caches(struct rds_ib_connection *ic); void rds_ib_recv_refill(struct rds_connection *conn, int prefill, gfp_t gfp); 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_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc, struct rds_ib_ack_state *state); 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); void rds_ib_set_ack(struct rds_ib_connection *ic, u64 seq, int ack_required); /* 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_path_complete(struct rds_conn_path *cp); 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_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc); 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_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats); #define rds_ib_stats_inc(member) … #define rds_ib_stats_add(member, count) … 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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