diff options
Diffstat (limited to 'include/linux/sunrpc/svc_rdma.h')
| -rw-r--r-- | include/linux/sunrpc/svc_rdma.h | 206 |
1 files changed, 161 insertions, 45 deletions
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h index 981f0d726ad4..57f4fd94166a 100644 --- a/include/linux/sunrpc/svc_rdma.h +++ b/include/linux/sunrpc/svc_rdma.h @@ -42,15 +42,21 @@ #ifndef SVC_RDMA_H #define SVC_RDMA_H +#include <linux/llist.h> #include <linux/sunrpc/xdr.h> #include <linux/sunrpc/svcsock.h> #include <linux/sunrpc/rpc_rdma.h> +#include <linux/sunrpc/rpc_rdma_cid.h> +#include <linux/sunrpc/svc_rdma_pcl.h> +#include <linux/sunrpc/rdma_rn.h> + +#include <linux/percpu_counter.h> #include <rdma/ib_verbs.h> #include <rdma/rdma_cm.h> -#define SVCRDMA_DEBUG /* Default and maximum inline threshold sizes */ enum { + RPCRDMA_PULLUP_THRESH = RPCRDMA_V1_DEF_INLINE_SIZE >> 1, RPCRDMA_DEF_INLINE_THRESH = 4096, RPCRDMA_MAX_INLINE_THRESH = 65536 }; @@ -60,21 +66,18 @@ extern unsigned int svcrdma_ord; extern unsigned int svcrdma_max_requests; extern unsigned int svcrdma_max_bc_requests; extern unsigned int svcrdma_max_req_size; +extern struct workqueue_struct *svcrdma_wq; -extern atomic_t rdma_stat_recv; -extern atomic_t rdma_stat_read; -extern atomic_t rdma_stat_write; -extern atomic_t rdma_stat_sq_starve; -extern atomic_t rdma_stat_rq_starve; -extern atomic_t rdma_stat_rq_poll; -extern atomic_t rdma_stat_rq_prod; -extern atomic_t rdma_stat_sq_poll; -extern atomic_t rdma_stat_sq_prod; +extern struct percpu_counter svcrdma_stat_read; +extern struct percpu_counter svcrdma_stat_recv; +extern struct percpu_counter svcrdma_stat_sq_starve; +extern struct percpu_counter svcrdma_stat_write; struct svcxprt_rdma { struct svc_xprt sc_xprt; /* SVC transport structure */ struct rdma_cm_id *sc_cm_id; /* RDMA connection id */ struct list_head sc_accept_q; /* Conn. waiting accept */ + struct rpcrdma_notification sc_rn; /* removal notification */ int sc_ord; /* RDMA read limit */ int sc_max_send_sges; bool sc_snd_w_inv; /* OK to use Send With Invalidate */ @@ -90,11 +93,14 @@ struct svcxprt_rdma { struct ib_pd *sc_pd; spinlock_t sc_send_lock; - struct list_head sc_send_ctxts; + struct llist_head sc_send_ctxts; spinlock_t sc_rw_ctxt_lock; - struct list_head sc_rw_ctxts; + struct llist_head sc_rw_ctxts; + u32 sc_pending_recvs; + u32 sc_recv_batch; struct list_head sc_rq_dto_q; + struct list_head sc_read_complete_q; spinlock_t sc_rq_dto_lock; struct ib_qp *sc_qp; struct ib_cq *sc_rq_cq; @@ -104,75 +110,183 @@ struct svcxprt_rdma { wait_queue_head_t sc_send_wait; /* SQ exhaustion waitlist */ unsigned long sc_flags; - struct list_head sc_read_complete_q; struct work_struct sc_work; - spinlock_t sc_recv_lock; - struct list_head sc_recv_ctxts; + struct llist_head sc_recv_ctxts; + + atomic_t sc_completion_ids; }; /* sc_flags */ #define RDMAXPRT_CONN_PENDING 3 +static inline struct svcxprt_rdma *svc_rdma_rqst_rdma(struct svc_rqst *rqstp) +{ + struct svc_xprt *xprt = rqstp->rq_xprt; + + return container_of(xprt, struct svcxprt_rdma, sc_xprt); +} + /* * Default connection parameters */ enum { RPCRDMA_LISTEN_BACKLOG = 10, - RPCRDMA_MAX_REQUESTS = 64, + RPCRDMA_MAX_REQUESTS = 128, RPCRDMA_MAX_BC_REQUESTS = 2, }; #define RPCSVC_MAXPAYLOAD_RDMA RPCSVC_MAXPAYLOAD +/** + * svc_rdma_send_cid_init - Initialize a Receive Queue completion ID + * @rdma: controlling transport + * @cid: completion ID to initialize + */ +static inline void svc_rdma_recv_cid_init(struct svcxprt_rdma *rdma, + struct rpc_rdma_cid *cid) +{ + cid->ci_queue_id = rdma->sc_rq_cq->res.id; + cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids); +} + +/** + * svc_rdma_send_cid_init - Initialize a Send Queue completion ID + * @rdma: controlling transport + * @cid: completion ID to initialize + */ +static inline void svc_rdma_send_cid_init(struct svcxprt_rdma *rdma, + struct rpc_rdma_cid *cid) +{ + cid->ci_queue_id = rdma->sc_sq_cq->res.id; + cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids); +} + +/* + * A chunk context tracks all I/O for moving one Read or Write + * chunk. This is a set of rdma_rw's that handle data movement + * for all segments of one chunk. + */ +struct svc_rdma_chunk_ctxt { + struct rpc_rdma_cid cc_cid; + struct ib_cqe cc_cqe; + struct list_head cc_rwctxts; + ktime_t cc_posttime; + int cc_sqecount; +}; + struct svc_rdma_recv_ctxt { + struct llist_node rc_node; struct list_head rc_list; struct ib_recv_wr rc_recv_wr; struct ib_cqe rc_cqe; + struct rpc_rdma_cid rc_cid; struct ib_sge rc_recv_sge; void *rc_recv_buf; - struct xdr_buf rc_arg; - bool rc_temp; + struct xdr_stream rc_stream; u32 rc_byte_len; - unsigned int rc_page_count; - unsigned int rc_hdr_count; u32 rc_inv_rkey; - struct page *rc_pages[RPCSVC_MAXPAGES]; + __be32 rc_msgtype; + + /* State for pulling a Read chunk */ + unsigned int rc_pageoff; + unsigned int rc_curpage; + unsigned int rc_readbytes; + struct xdr_buf rc_saved_arg; + struct svc_rdma_chunk_ctxt rc_cc; + + struct svc_rdma_pcl rc_call_pcl; + + struct svc_rdma_pcl rc_read_pcl; + struct svc_rdma_chunk *rc_cur_result_payload; + struct svc_rdma_pcl rc_write_pcl; + struct svc_rdma_pcl rc_reply_pcl; + + unsigned int rc_page_count; + unsigned long rc_maxpages; + struct page *rc_pages[] __counted_by(rc_maxpages); +}; + +/* + * State for sending a Write chunk. + * - Tracks progress of writing one chunk over all its segments + * - Stores arguments for the SGL constructor functions + */ +struct svc_rdma_write_info { + struct svcxprt_rdma *wi_rdma; + + const struct svc_rdma_chunk *wi_chunk; + + /* write state of this chunk */ + unsigned int wi_seg_off; + unsigned int wi_seg_no; + + /* SGL constructor arguments */ + const struct xdr_buf *wi_xdr; + unsigned char *wi_base; + unsigned int wi_next_off; + + struct svc_rdma_chunk_ctxt wi_cc; + struct work_struct wi_work; }; struct svc_rdma_send_ctxt { - struct list_head sc_list; + struct llist_node sc_node; + struct rpc_rdma_cid sc_cid; + struct work_struct sc_work; + + struct svcxprt_rdma *sc_rdma; struct ib_send_wr sc_send_wr; + struct ib_send_wr *sc_wr_chain; + int sc_sqecount; struct ib_cqe sc_cqe; + struct xdr_buf sc_hdrbuf; + struct xdr_stream sc_stream; + struct svc_rdma_write_info sc_reply_info; void *sc_xprt_buf; int sc_page_count; int sc_cur_sge_no; - struct page *sc_pages[RPCSVC_MAXPAGES]; + unsigned long sc_maxpages; + struct page **sc_pages; struct ib_sge sc_sges[]; }; /* svc_rdma_backchannel.c */ -extern int svc_rdma_handle_bc_reply(struct rpc_xprt *xprt, - __be32 *rdma_resp, - struct xdr_buf *rcvbuf); +extern void svc_rdma_handle_bc_reply(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *rctxt); /* svc_rdma_recvfrom.c */ extern void svc_rdma_recv_ctxts_destroy(struct svcxprt_rdma *rdma); extern bool svc_rdma_post_recvs(struct svcxprt_rdma *rdma); +extern struct svc_rdma_recv_ctxt * + svc_rdma_recv_ctxt_get(struct svcxprt_rdma *rdma); extern void svc_rdma_recv_ctxt_put(struct svcxprt_rdma *rdma, struct svc_rdma_recv_ctxt *ctxt); extern void svc_rdma_flush_recv_queues(struct svcxprt_rdma *rdma); +extern void svc_rdma_release_ctxt(struct svc_xprt *xprt, void *ctxt); extern int svc_rdma_recvfrom(struct svc_rqst *); /* svc_rdma_rw.c */ +extern void svc_rdma_cc_init(struct svcxprt_rdma *rdma, + struct svc_rdma_chunk_ctxt *cc); extern void svc_rdma_destroy_rw_ctxts(struct svcxprt_rdma *rdma); -extern int svc_rdma_recv_read_chunk(struct svcxprt_rdma *rdma, - struct svc_rqst *rqstp, - struct svc_rdma_recv_ctxt *head, __be32 *p); -extern int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma, - __be32 *wr_ch, struct xdr_buf *xdr); -extern int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma, - __be32 *rp_ch, bool writelist, - struct xdr_buf *xdr); +extern void svc_rdma_cc_init(struct svcxprt_rdma *rdma, + struct svc_rdma_chunk_ctxt *cc); +extern void svc_rdma_cc_release(struct svcxprt_rdma *rdma, + struct svc_rdma_chunk_ctxt *cc, + enum dma_data_direction dir); +extern void svc_rdma_reply_chunk_release(struct svcxprt_rdma *rdma, + struct svc_rdma_send_ctxt *ctxt); +extern int svc_rdma_send_write_list(struct svcxprt_rdma *rdma, + const struct svc_rdma_recv_ctxt *rctxt, + const struct xdr_buf *xdr); +extern int svc_rdma_prepare_reply_chunk(struct svcxprt_rdma *rdma, + const struct svc_rdma_pcl *write_pcl, + const struct svc_rdma_pcl *reply_pcl, + struct svc_rdma_send_ctxt *sctxt, + const struct xdr_buf *xdr); +extern int svc_rdma_process_read_list(struct svcxprt_rdma *rdma, + struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head); /* svc_rdma_sendto.c */ extern void svc_rdma_send_ctxts_destroy(struct svcxprt_rdma *rdma); @@ -180,27 +294,29 @@ extern struct svc_rdma_send_ctxt * svc_rdma_send_ctxt_get(struct svcxprt_rdma *rdma); extern void svc_rdma_send_ctxt_put(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *ctxt); -extern int svc_rdma_send(struct svcxprt_rdma *rdma, struct ib_send_wr *wr); -extern void svc_rdma_sync_reply_hdr(struct svcxprt_rdma *rdma, - struct svc_rdma_send_ctxt *ctxt, - unsigned int len); +extern int svc_rdma_post_send(struct svcxprt_rdma *rdma, + struct svc_rdma_send_ctxt *ctxt); extern int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma, - struct svc_rdma_send_ctxt *ctxt, - struct xdr_buf *xdr, __be32 *wr_lst); + struct svc_rdma_send_ctxt *sctxt, + const struct svc_rdma_pcl *write_pcl, + const struct svc_rdma_pcl *reply_pcl, + const struct xdr_buf *xdr); +extern void svc_rdma_send_error_msg(struct svcxprt_rdma *rdma, + struct svc_rdma_send_ctxt *sctxt, + struct svc_rdma_recv_ctxt *rctxt, + int status); +extern void svc_rdma_wake_send_waiters(struct svcxprt_rdma *rdma, int avail); extern int svc_rdma_sendto(struct svc_rqst *); +extern int svc_rdma_result_payload(struct svc_rqst *rqstp, unsigned int offset, + unsigned int length); /* svc_rdma_transport.c */ -extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *); -extern void svc_sq_reap(struct svcxprt_rdma *); -extern void svc_rq_reap(struct svcxprt_rdma *); - extern struct svc_xprt_class svc_rdma_class; #ifdef CONFIG_SUNRPC_BACKCHANNEL extern struct svc_xprt_class svc_rdma_bc_class; #endif /* svc_rdma.c */ -extern struct workqueue_struct *svc_rdma_wq; extern int svc_rdma_init(void); extern void svc_rdma_cleanup(void); |