| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Andy Grover | 1336 | 75.65% | 15 | 25.00% |
| Santosh Shilimkar | 169 | 9.57% | 15 | 25.00% |
| Ka-Cheong Poon | 83 | 4.70% | 3 | 5.00% |
| Chris Mason | 59 | 3.34% | 1 | 1.67% |
| Fabian Frederick | 32 | 1.81% | 1 | 1.67% |
| Zach Brown | 23 | 1.30% | 4 | 6.67% |
| Christoph Hellwig | 12 | 0.68% | 1 | 1.67% |
| Sowmini Varadhan | 11 | 0.62% | 3 | 5.00% |
| Bart Van Assche | 7 | 0.40% | 2 | 3.33% |
| Joe Perches | 6 | 0.34% | 1 | 1.67% |
| Hans Westgaard Ry | 4 | 0.23% | 1 | 1.67% |
| Gerd Rausch | 4 | 0.23% | 2 | 3.33% |
| Alexey Dobriyan | 3 | 0.17% | 1 | 1.67% |
| Zhu Yanjun | 3 | 0.17% | 1 | 1.67% |
| Steve Wise | 3 | 0.17% | 1 | 1.67% |
| Linus Torvalds (pre-git) | 2 | 0.11% | 1 | 1.67% |
| Al Viro | 2 | 0.11% | 1 | 1.67% |
| Avinash Repaka | 2 | 0.11% | 1 | 1.67% |
| David S. Miller | 1 | 0.06% | 1 | 1.67% |
| Elena Reshetova | 1 | 0.06% | 1 | 1.67% |
| Linus Torvalds | 1 | 0.06% | 1 | 1.67% |
| Shan Wei | 1 | 0.06% | 1 | 1.67% |
| Greg Kroah-Hartman | 1 | 0.06% | 1 | 1.67% |
| Total | 1766 | 60 |
/* 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 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_FR_WR 512 #define RDS_IB_DEFAULT_RETRY_COUNT 1 #define RDS_IB_SUPPORTED_PROTOCOLS 0x00000003 /* minor versions supported */ #define RDS_IB_RECYCLE_BATCH_COUNT 32 #define RDS_IB_WC_MAX 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; }; /* 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 { u8 ricpc_protocol_major; u8 ricpc_protocol_minor; __be16 ricpc_protocol_minor_mask; /* bitmask */ u8 ricpc_dp_toss; u8 ripc_reserved1; __be16 ripc_reserved2; __be64 ricpc_ack_seq; __be32 ricpc_credit; /* non-zero enables flow ctl */ }; struct rds_ib_connect_private { /* Add new fields at the end, and don't permute existing fields. */ __be32 dp_saddr; __be32 dp_daddr; struct rds_ib_conn_priv_cmn dp_cmn; }; struct rds6_ib_connect_private { /* Add new fields at the end, and don't permute existing fields. */ struct in6_addr dp_saddr; struct in6_addr dp_daddr; struct rds_ib_conn_priv_cmn dp_cmn; }; #define dp_protocol_major dp_cmn.ricpc_protocol_major #define dp_protocol_minor dp_cmn.ricpc_protocol_minor #define dp_protocol_minor_mask dp_cmn.ricpc_protocol_minor_mask #define dp_ack_seq dp_cmn.ricpc_ack_seq #define dp_credit dp_cmn.ricpc_credit union rds_ib_conn_priv { struct rds_ib_connect_private ricp_v4; struct rds6_ib_connect_private ricp_v6; }; struct rds_ib_send_work { void *s_op; union { struct ib_send_wr s_wr; struct ib_rdma_wr s_rdma_wr; struct ib_atomic_wr s_atomic_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; }; /* 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 { u64 ack_next; u64 ack_recv; unsigned int ack_required:1; unsigned int ack_next_valid:1; unsigned int ack_recv_valid:1; }; 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_cq *i_send_cq; struct ib_cq *i_recv_cq; struct ib_wc i_send_wc[RDS_IB_WC_MAX]; struct ib_wc i_recv_wc[RDS_IB_WC_MAX]; /* To control the number of wrs from fastreg */ atomic_t i_fastreg_wrs; atomic_t i_fastreg_inuse_count; /* interrupt handling */ struct tasklet_struct i_send_tasklet; struct tasklet_struct i_recv_tasklet; /* tx */ struct rds_ib_work_ring i_send_ring; struct rm_data_op *i_data_op; struct rds_header **i_send_hdrs; dma_addr_t *i_send_hdrs_dma; struct rds_ib_send_work *i_sends; atomic_t i_signaled_sends; /* rx */ 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; dma_addr_t *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; atomic_t i_cache_allocs; /* 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; dma_addr_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; /* Endpoint role in connection */ bool i_active_side; atomic_t i_cq_quiesce; /* Send/Recv vectors */ int i_scq_vector; int i_rcq_vector; u8 i_sl; }; /* 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 rcu_head rcu; }; enum { RDS_IB_MR_8K_POOL, RDS_IB_MR_1M_POOL, }; 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; u8 odp_capable:1; unsigned int max_mrs; struct rds_ib_mr_pool *mr_1m_pool; struct rds_ib_mr_pool *mr_8k_pool; unsigned int max_8k_mrs; unsigned int max_1m_mrs; int max_sge; unsigned int max_wrs; unsigned int max_initiator_depth; unsigned int max_responder_resources; spinlock_t spinlock; /* protect the above */ refcount_t refcount; struct work_struct free_work; int *vector_load; }; #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_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_total_frags; uint64_t s_ib_rx_total_incs; 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_8k_alloc; uint64_t s_ib_rdma_mr_8k_free; uint64_t s_ib_rdma_mr_8k_used; uint64_t s_ib_rdma_mr_8k_pool_flush; uint64_t s_ib_rdma_mr_8k_pool_wait; uint64_t s_ib_rdma_mr_8k_pool_depleted; uint64_t s_ib_rdma_mr_1m_alloc; uint64_t s_ib_rdma_mr_1m_free; uint64_t s_ib_rdma_mr_1m_used; uint64_t s_ib_rdma_mr_1m_pool_flush; uint64_t s_ib_rdma_mr_1m_pool_wait; uint64_t s_ib_rdma_mr_1m_pool_depleted; uint64_t s_ib_rdma_mr_8k_reused; uint64_t s_ib_rdma_mr_1m_reused; uint64_t s_ib_atomic_cswp; uint64_t s_ib_atomic_fadd; uint64_t s_ib_recv_added_to_cache; uint64_t s_ib_recv_removed_from_cache; }; 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, sg_dma_address(sg), sg_dma_len(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, sg_dma_address(sg), sg_dma_len(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 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...) \ __rds_ib_conn_error(conn, KERN_WARNING "RDS/IB: " 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) rds_stats_inc_which(rds_ib_stats, member) #define rds_ib_stats_add(member, count) \ rds_stats_add_which(rds_ib_stats, 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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