diff options
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/Makefile | 4 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/rpc_rdma.c | 277 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma.c | 63 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_marshal.c | 82 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 547 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_sendto.c | 188 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_transport.c | 476 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/transport.c | 283 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 1121 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/xprt_rdma.h | 52 |
10 files changed, 1784 insertions, 1309 deletions
diff --git a/net/sunrpc/xprtrdma/Makefile b/net/sunrpc/xprtrdma/Makefile index 5a8f268bdd3..da5136fd569 100644 --- a/net/sunrpc/xprtrdma/Makefile +++ b/net/sunrpc/xprtrdma/Makefile @@ -1,8 +1,8 @@ -obj-$(CONFIG_SUNRPC_XPRT_RDMA) += xprtrdma.o +obj-$(CONFIG_SUNRPC_XPRT_RDMA_CLIENT) += xprtrdma.o xprtrdma-y := transport.o rpc_rdma.o verbs.o -obj-$(CONFIG_SUNRPC_XPRT_RDMA) += svcrdma.o +obj-$(CONFIG_SUNRPC_XPRT_RDMA_SERVER) += svcrdma.o svcrdma-y := svc_rdma.o svc_rdma_transport.o \ svc_rdma_marshal.o svc_rdma_sendto.o svc_rdma_recvfrom.o diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index e55427f73df..693966d3f33 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -78,8 +78,7 @@ static const char transfertypes[][12] = { * elements. Segments are then coalesced when registered, if possible * within the selected memreg mode. * - * Note, this routine is never called if the connection's memory - * registration strategy is 0 (bounce buffers). + * Returns positive number of segments converted, or a negative errno. */ static int @@ -87,6 +86,8 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos, enum rpcrdma_chunktype type, struct rpcrdma_mr_seg *seg, int nsegs) { int len, n = 0, p; + int page_base; + struct page **ppages; if (pos == 0 && xdrbuf->head[0].iov_len) { seg[n].mr_page = NULL; @@ -95,31 +96,40 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos, ++n; } - if (xdrbuf->page_len && (xdrbuf->pages[0] != NULL)) { - if (n == nsegs) - return 0; - seg[n].mr_page = xdrbuf->pages[0]; - seg[n].mr_offset = (void *)(unsigned long) xdrbuf->page_base; - seg[n].mr_len = min_t(u32, - PAGE_SIZE - xdrbuf->page_base, xdrbuf->page_len); - len = xdrbuf->page_len - seg[n].mr_len; - ++n; - p = 1; - while (len > 0) { - if (n == nsegs) - return 0; - seg[n].mr_page = xdrbuf->pages[p]; - seg[n].mr_offset = NULL; - seg[n].mr_len = min_t(u32, PAGE_SIZE, len); - len -= seg[n].mr_len; - ++n; - ++p; + len = xdrbuf->page_len; + ppages = xdrbuf->pages + (xdrbuf->page_base >> PAGE_SHIFT); + page_base = xdrbuf->page_base & ~PAGE_MASK; + p = 0; + while (len && n < nsegs) { + if (!ppages[p]) { + /* alloc the pagelist for receiving buffer */ + ppages[p] = alloc_page(GFP_ATOMIC); + if (!ppages[p]) + return -ENOMEM; } + seg[n].mr_page = ppages[p]; + seg[n].mr_offset = (void *)(unsigned long) page_base; + seg[n].mr_len = min_t(u32, PAGE_SIZE - page_base, len); + if (seg[n].mr_len > PAGE_SIZE) + return -EIO; + len -= seg[n].mr_len; + ++n; + ++p; + page_base = 0; /* page offset only applies to first page */ } + /* Message overflows the seg array */ + if (len && n == nsegs) + return -EIO; + if (xdrbuf->tail[0].iov_len) { + /* the rpcrdma protocol allows us to omit any trailing + * xdr pad bytes, saving the server an RDMA operation. */ + if (xdrbuf->tail[0].iov_len < 4 && xprt_rdma_pad_optimize) + return n; if (n == nsegs) - return 0; + /* Tail remains, but we're out of segments */ + return -EIO; seg[n].mr_page = NULL; seg[n].mr_offset = xdrbuf->tail[0].iov_base; seg[n].mr_len = xdrbuf->tail[0].iov_len; @@ -160,15 +170,17 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos, * Reply chunk (a counted array): * N elements: * 1 - N - HLOO - HLOO - ... - HLOO + * + * Returns positive RPC/RDMA header size, or negative errno. */ -static unsigned int +static ssize_t rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target, struct rpcrdma_msg *headerp, enum rpcrdma_chunktype type) { struct rpcrdma_req *req = rpcr_to_rdmar(rqst); - struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_task->tk_xprt); - int nsegs, nchunks = 0; + struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt); + int n, nsegs, nchunks = 0; unsigned int pos; struct rpcrdma_mr_seg *seg = req->rl_segments; struct rpcrdma_read_chunk *cur_rchunk = NULL; @@ -194,12 +206,11 @@ rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target, pos = target->head[0].iov_len; nsegs = rpcrdma_convert_iovs(target, pos, type, seg, RPCRDMA_MAX_SEGS); - if (nsegs == 0) - return 0; + if (nsegs < 0) + return nsegs; do { - /* bind/register the memory, then build chunk from result. */ - int n = rpcrdma_register_external(seg, nsegs, + n = rpcrdma_register_external(seg, nsegs, cur_wchunk != NULL, r_xprt); if (n <= 0) goto out; @@ -244,8 +255,6 @@ rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target, /* success. all failures return above */ req->rl_nchunks = nchunks; - BUG_ON(nchunks == 0); - /* * finish off header. If write, marshal discrim and nchunks. */ @@ -272,8 +281,8 @@ rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target, out: for (pos = 0; nchunks--;) pos += rpcrdma_deregister_external( - &req->rl_segments[pos], r_xprt, NULL); - return 0; + &req->rl_segments[pos], r_xprt); + return n; } /* @@ -290,6 +299,8 @@ rpcrdma_inline_pullup(struct rpc_rqst *rqst, int pad) int copy_len; unsigned char *srcp, *destp; struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt); + int page_base; + struct page **ppages; destp = rqst->rq_svec[0].iov_base; curlen = rqst->rq_svec[0].iov_len; @@ -306,38 +317,37 @@ rpcrdma_inline_pullup(struct rpc_rqst *rqst, int pad) __func__, pad, destp, rqst->rq_slen, curlen); copy_len = rqst->rq_snd_buf.page_len; + + if (rqst->rq_snd_buf.tail[0].iov_len) { + curlen = rqst->rq_snd_buf.tail[0].iov_len; + if (destp + copy_len != rqst->rq_snd_buf.tail[0].iov_base) { + memmove(destp + copy_len, + rqst->rq_snd_buf.tail[0].iov_base, curlen); + r_xprt->rx_stats.pullup_copy_count += curlen; + } + dprintk("RPC: %s: tail destp 0x%p len %d\n", + __func__, destp + copy_len, curlen); + rqst->rq_svec[0].iov_len += curlen; + } r_xprt->rx_stats.pullup_copy_count += copy_len; - npages = PAGE_ALIGN(rqst->rq_snd_buf.page_base+copy_len) >> PAGE_SHIFT; + + page_base = rqst->rq_snd_buf.page_base; + ppages = rqst->rq_snd_buf.pages + (page_base >> PAGE_SHIFT); + page_base &= ~PAGE_MASK; + npages = PAGE_ALIGN(page_base+copy_len) >> PAGE_SHIFT; for (i = 0; copy_len && i < npages; i++) { - if (i == 0) - curlen = PAGE_SIZE - rqst->rq_snd_buf.page_base; - else - curlen = PAGE_SIZE; + curlen = PAGE_SIZE - page_base; if (curlen > copy_len) curlen = copy_len; dprintk("RPC: %s: page %d destp 0x%p len %d curlen %d\n", __func__, i, destp, copy_len, curlen); - srcp = kmap_atomic(rqst->rq_snd_buf.pages[i], - KM_SKB_SUNRPC_DATA); - if (i == 0) - memcpy(destp, srcp+rqst->rq_snd_buf.page_base, curlen); - else - memcpy(destp, srcp, curlen); - kunmap_atomic(srcp, KM_SKB_SUNRPC_DATA); + srcp = kmap_atomic(ppages[i]); + memcpy(destp, srcp+page_base, curlen); + kunmap_atomic(srcp); rqst->rq_svec[0].iov_len += curlen; destp += curlen; copy_len -= curlen; - } - if (rqst->rq_snd_buf.tail[0].iov_len) { - curlen = rqst->rq_snd_buf.tail[0].iov_len; - if (destp != rqst->rq_snd_buf.tail[0].iov_base) { - memcpy(destp, - rqst->rq_snd_buf.tail[0].iov_base, curlen); - r_xprt->rx_stats.pullup_copy_count += curlen; - } - dprintk("RPC: %s: tail destp 0x%p len %d curlen %d\n", - __func__, destp, copy_len, curlen); - rqst->rq_svec[0].iov_len += curlen; + page_base = 0; } /* header now contains entire send message */ return pad; @@ -354,16 +364,19 @@ rpcrdma_inline_pullup(struct rpc_rqst *rqst, int pad) * [1] -- the RPC header/data, marshaled by RPC and the NFS protocol. * [2] -- optional padding. * [3] -- if padded, header only in [1] and data here. + * + * Returns zero on success, otherwise a negative errno. */ int rpcrdma_marshal_req(struct rpc_rqst *rqst) { - struct rpc_xprt *xprt = rqst->rq_task->tk_xprt; + struct rpc_xprt *xprt = rqst->rq_xprt; struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); struct rpcrdma_req *req = rpcr_to_rdmar(rqst); char *base; - size_t hdrlen, rpclen, padlen; + size_t rpclen, padlen; + ssize_t hdrlen; enum rpcrdma_chunktype rtype, wtype; struct rpcrdma_msg *headerp; @@ -434,14 +447,10 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) /* The following simplification is not true forever */ if (rtype != rpcrdma_noch && wtype == rpcrdma_replych) wtype = rpcrdma_noch; - BUG_ON(rtype != rpcrdma_noch && wtype != rpcrdma_noch); - - if (r_xprt->rx_ia.ri_memreg_strategy == RPCRDMA_BOUNCEBUFFERS && - (rtype != rpcrdma_noch || wtype != rpcrdma_noch)) { - /* forced to "pure inline"? */ - dprintk("RPC: %s: too much data (%d/%d) for inline\n", - __func__, rqst->rq_rcv_buf.len, rqst->rq_snd_buf.len); - return -1; + if (rtype != rpcrdma_noch && wtype != rpcrdma_noch) { + dprintk("RPC: %s: cannot marshal multiple chunk lists\n", + __func__); + return -EIO; } hdrlen = 28; /*sizeof *headerp;*/ @@ -467,8 +476,11 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) headerp->rm_body.rm_padded.rm_pempty[1] = xdr_zero; headerp->rm_body.rm_padded.rm_pempty[2] = xdr_zero; hdrlen += 2 * sizeof(u32); /* extra words in padhdr */ - BUG_ON(wtype != rpcrdma_noch); - + if (wtype != rpcrdma_noch) { + dprintk("RPC: %s: invalid chunk list\n", + __func__); + return -EIO; + } } else { headerp->rm_body.rm_nochunks.rm_empty[0] = xdr_zero; headerp->rm_body.rm_nochunks.rm_empty[1] = xdr_zero; @@ -485,8 +497,7 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) * on receive. Therefore, we request a reply chunk * for non-writes wherever feasible and efficient. */ - if (wtype == rpcrdma_noch && - r_xprt->rx_ia.ri_memreg_strategy > RPCRDMA_REGISTER) + if (wtype == rpcrdma_noch) wtype = rpcrdma_replych; } } @@ -504,12 +515,11 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) hdrlen = rpcrdma_create_chunks(rqst, &rqst->rq_rcv_buf, headerp, wtype); } + if (hdrlen < 0) + return hdrlen; - if (hdrlen == 0) - return -1; - - dprintk("RPC: %s: %s: hdrlen %zd rpclen %zd padlen %zd\n" - " headerp 0x%p base 0x%p lkey 0x%x\n", + dprintk("RPC: %s: %s: hdrlen %zd rpclen %zd padlen %zd" + " headerp 0x%p base 0x%p lkey 0x%x\n", __func__, transfertypes[wtype], hdrlen, rpclen, padlen, headerp, base, req->rl_iov.lkey); @@ -594,10 +604,12 @@ rpcrdma_count_chunks(struct rpcrdma_rep *rep, unsigned int max, int wrchunk, __b * Scatter inline received data back into provided iov's. */ static void -rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len) +rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len, int pad) { int i, npages, curlen, olen; char *destp; + struct page **ppages; + int page_base; curlen = rqst->rq_rcv_buf.head[0].iov_len; if (curlen > copy_len) { /* write chunk header fixup */ @@ -616,43 +628,38 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len) olen = copy_len; i = 0; rpcx_to_rdmax(rqst->rq_xprt)->rx_stats.fixup_copy_count += olen; + page_base = rqst->rq_rcv_buf.page_base; + ppages = rqst->rq_rcv_buf.pages + (page_base >> PAGE_SHIFT); + page_base &= ~PAGE_MASK; + if (copy_len && rqst->rq_rcv_buf.page_len) { - npages = PAGE_ALIGN(rqst->rq_rcv_buf.page_base + + npages = PAGE_ALIGN(page_base + rqst->rq_rcv_buf.page_len) >> PAGE_SHIFT; for (; i < npages; i++) { - if (i == 0) - curlen = PAGE_SIZE - rqst->rq_rcv_buf.page_base; - else - curlen = PAGE_SIZE; + curlen = PAGE_SIZE - page_base; if (curlen > copy_len) curlen = copy_len; dprintk("RPC: %s: page %d" " srcp 0x%p len %d curlen %d\n", __func__, i, srcp, copy_len, curlen); - destp = kmap_atomic(rqst->rq_rcv_buf.pages[i], - KM_SKB_SUNRPC_DATA); - if (i == 0) - memcpy(destp + rqst->rq_rcv_buf.page_base, - srcp, curlen); - else - memcpy(destp, srcp, curlen); - flush_dcache_page(rqst->rq_rcv_buf.pages[i]); - kunmap_atomic(destp, KM_SKB_SUNRPC_DATA); + destp = kmap_atomic(ppages[i]); + memcpy(destp + page_base, srcp, curlen); + flush_dcache_page(ppages[i]); + kunmap_atomic(destp); srcp += curlen; copy_len -= curlen; if (copy_len == 0) break; + page_base = 0; } - rqst->rq_rcv_buf.page_len = olen - copy_len; - } else - rqst->rq_rcv_buf.page_len = 0; + } if (copy_len && rqst->rq_rcv_buf.tail[0].iov_len) { curlen = copy_len; if (curlen > rqst->rq_rcv_buf.tail[0].iov_len) curlen = rqst->rq_rcv_buf.tail[0].iov_len; if (rqst->rq_rcv_buf.tail[0].iov_base != srcp) - memcpy(rqst->rq_rcv_buf.tail[0].iov_base, srcp, curlen); + memmove(rqst->rq_rcv_buf.tail[0].iov_base, srcp, curlen); dprintk("RPC: %s: tail srcp 0x%p len %d curlen %d\n", __func__, srcp, copy_len, curlen); rqst->rq_rcv_buf.tail[0].iov_len = curlen; @@ -660,6 +667,13 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len) } else rqst->rq_rcv_buf.tail[0].iov_len = 0; + if (pad) { + /* implicit padding on terminal chunk */ + unsigned char *p = rqst->rq_rcv_buf.tail[0].iov_base; + while (pad--) + p[rqst->rq_rcv_buf.tail[0].iov_len++] = 0; + } + if (copy_len) dprintk("RPC: %s: %d bytes in" " %d extra segments (%d lost)\n", @@ -669,36 +683,36 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len) rqst->rq_private_buf = rqst->rq_rcv_buf; } -/* - * This function is called when an async event is posted to - * the connection which changes the connection state. All it - * does at this point is mark the connection up/down, the rpc - * timers do the rest. - */ void -rpcrdma_conn_func(struct rpcrdma_ep *ep) +rpcrdma_connect_worker(struct work_struct *work) { + struct rpcrdma_ep *ep = + container_of(work, struct rpcrdma_ep, rep_connect_worker.work); struct rpc_xprt *xprt = ep->rep_xprt; spin_lock_bh(&xprt->transport_lock); + if (++xprt->connect_cookie == 0) /* maintain a reserved value */ + ++xprt->connect_cookie; if (ep->rep_connected > 0) { if (!xprt_test_and_set_connected(xprt)) xprt_wake_pending_tasks(xprt, 0); } else { if (xprt_test_and_clear_connected(xprt)) - xprt_wake_pending_tasks(xprt, ep->rep_connected); + xprt_wake_pending_tasks(xprt, -ENOTCONN); } spin_unlock_bh(&xprt->transport_lock); } /* - * This function is called when memory window unbind which we are waiting - * for completes. Just use rr_func (zeroed by upcall) to signal completion. + * This function is called when an async event is posted to + * the connection which changes the connection state. All it + * does at this point is mark the connection up/down, the rpc + * timers do the rest. */ -static void -rpcrdma_unbind_func(struct rpcrdma_rep *rep) +void +rpcrdma_conn_func(struct rpcrdma_ep *ep) { - wake_up(&rep->rr_unbind); + schedule_delayed_work(&ep->rep_connect_worker, 0); } /* @@ -715,7 +729,8 @@ rpcrdma_reply_handler(struct rpcrdma_rep *rep) struct rpc_xprt *xprt = rep->rr_xprt; struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); __be32 *iptr; - int i, rdmalen, status; + int rdmalen, status; + unsigned long cwnd; /* Check status. If bad, signal disconnect and return rep to pool */ if (rep->rr_len == ~0U) { @@ -756,20 +771,26 @@ repost: /* get request object */ req = rpcr_to_rdmar(rqst); + if (req->rl_reply) { + spin_unlock(&xprt->transport_lock); + dprintk("RPC: %s: duplicate reply 0x%p to RPC " + "request 0x%p: xid 0x%08x\n", __func__, rep, req, + headerp->rm_xid); + goto repost; + } dprintk("RPC: %s: reply 0x%p completes request 0x%p\n" " RPC request 0x%p xid 0x%08x\n", __func__, rep, req, rqst, headerp->rm_xid); - BUG_ON(!req || req->rl_reply); - /* from here on, the reply is no longer an orphan */ req->rl_reply = rep; + xprt->reestablish_timeout = 0; /* check for expected message types */ /* The order of some of these tests is important. */ switch (headerp->rm_type) { - case __constant_htonl(RDMA_MSG): + case htonl(RDMA_MSG): /* never expect read chunks */ /* never expect reply chunks (two ways to check) */ /* never expect write chunks without having offered RDMA */ @@ -792,17 +813,23 @@ repost: ((unsigned char *)iptr - (unsigned char *)headerp); status = rep->rr_len + rdmalen; r_xprt->rx_stats.total_rdma_reply += rdmalen; + /* special case - last chunk may omit padding */ + if (rdmalen &= 3) { + rdmalen = 4 - rdmalen; + status += rdmalen; + } } else { /* else ordinary inline */ + rdmalen = 0; iptr = (__be32 *)((unsigned char *)headerp + 28); rep->rr_len -= 28; /*sizeof *headerp;*/ status = rep->rr_len; } /* Fix up the rpc results for upper layer */ - rpcrdma_inline_fixup(rqst, (char *)iptr, rep->rr_len); + rpcrdma_inline_fixup(rqst, (char *)iptr, rep->rr_len, rdmalen); break; - case __constant_htonl(RDMA_NOMSG): + case htonl(RDMA_NOMSG): /* never expect read or write chunks, always reply chunks */ if (headerp->rm_body.rm_chunks[0] != xdr_zero || headerp->rm_body.rm_chunks[1] != xdr_zero || @@ -833,26 +860,10 @@ badheader: break; } - /* If using mw bind, start the deregister process now. */ - /* (Note: if mr_free(), cannot perform it here, in tasklet context) */ - if (req->rl_nchunks) switch (r_xprt->rx_ia.ri_memreg_strategy) { - case RPCRDMA_MEMWINDOWS: - for (i = 0; req->rl_nchunks-- > 1;) - i += rpcrdma_deregister_external( - &req->rl_segments[i], r_xprt, NULL); - /* Optionally wait (not here) for unbinds to complete */ - rep->rr_func = rpcrdma_unbind_func; - (void) rpcrdma_deregister_external(&req->rl_segments[i], - r_xprt, rep); - break; - case RPCRDMA_MEMWINDOWS_ASYNC: - for (i = 0; req->rl_nchunks--;) - i += rpcrdma_deregister_external(&req->rl_segments[i], - r_xprt, NULL); - break; - default: - break; - } + cwnd = xprt->cwnd; + xprt->cwnd = atomic_read(&r_xprt->rx_buf.rb_credits) << RPC_CWNDSHIFT; + if (xprt->cwnd > cwnd) + xprt_release_rqst_cong(rqst->rq_task); dprintk("RPC: %s: xprt_complete_rqst(0x%p, 0x%p, %d)\n", __func__, xprt, rqst, status); diff --git a/net/sunrpc/xprtrdma/svc_rdma.c b/net/sunrpc/xprtrdma/svc_rdma.c index 87101177825..c1b6270262c 100644 --- a/net/sunrpc/xprtrdma/svc_rdma.c +++ b/net/sunrpc/xprtrdma/svc_rdma.c @@ -40,11 +40,14 @@ */ #include <linux/module.h> #include <linux/init.h> +#include <linux/slab.h> #include <linux/fs.h> #include <linux/sysctl.h> +#include <linux/workqueue.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/sched.h> #include <linux/sunrpc/svc_rdma.h> +#include "xprt_rdma.h" #define RPCDBG_FACILITY RPCDBG_SVCXPRT @@ -73,14 +76,16 @@ atomic_t rdma_stat_sq_prod; struct kmem_cache *svc_rdma_map_cachep; struct kmem_cache *svc_rdma_ctxt_cachep; +struct workqueue_struct *svc_rdma_wq; + /* * This function implements reading and resetting an atomic_t stat * variable through read/write to a proc file. Any write to the file * resets the associated statistic to zero. Any read returns it's * current value. */ -static int read_reset_stat(ctl_table *table, int write, - struct file *filp, void __user *buffer, size_t *lenp, +static int read_reset_stat(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) { atomic_t *stat = (atomic_t *)table->data; @@ -114,14 +119,13 @@ static int read_reset_stat(ctl_table *table, int write, } static struct ctl_table_header *svcrdma_table_header; -static ctl_table svcrdma_parm_table[] = { +static struct ctl_table svcrdma_parm_table[] = { { .procname = "max_requests", .data = &svcrdma_max_requests, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, - .strategy = &sysctl_intvec, + .proc_handler = proc_dointvec_minmax, .extra1 = &min_max_requests, .extra2 = &max_max_requests }, @@ -130,8 +134,7 @@ static ctl_table svcrdma_parm_table[] = { .data = &svcrdma_max_req_size, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, - .strategy = &sysctl_intvec, + .proc_handler = proc_dointvec_minmax, .extra1 = &min_max_inline, .extra2 = &max_max_inline }, @@ -140,8 +143,7 @@ static ctl_table svcrdma_parm_table[] = { .data = &svcrdma_ord, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, - .strategy = &sysctl_intvec, + .proc_handler = proc_dointvec_minmax, .extra1 = &min_ord, .extra2 = &max_ord, }, @@ -151,96 +153,89 @@ static ctl_table svcrdma_parm_table[] = { .data = &rdma_stat_read, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, + .proc_handler = read_reset_stat, }, { .procname = "rdma_stat_recv", .data = &rdma_stat_recv, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, + .proc_handler = read_reset_stat, }, { .procname = "rdma_stat_write", .data = &rdma_stat_write, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, + .proc_handler = read_reset_stat, }, { .procname = "rdma_stat_sq_starve", .data = &rdma_stat_sq_starve, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, + .proc_handler = read_reset_stat, }, { .procname = "rdma_stat_rq_starve", .data = &rdma_stat_rq_starve, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, + .proc_handler = read_reset_stat, }, { .procname = "rdma_stat_rq_poll", .data = &rdma_stat_rq_poll, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, + .proc_handler = read_reset_stat, }, { .procname = "rdma_stat_rq_prod", .data = &rdma_stat_rq_prod, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, + .proc_handler = read_reset_stat, }, { .procname = "rdma_stat_sq_poll", .data = &rdma_stat_sq_poll, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, + .proc_handler = read_reset_stat, }, { .procname = "rdma_stat_sq_prod", .data = &rdma_stat_sq_prod, .maxlen = sizeof(atomic_t), .mode = 0644, - .proc_handler = &read_reset_stat, - }, - { - .ctl_name = 0, + .proc_handler = read_reset_stat, }, + { }, }; -static ctl_table svcrdma_table[] = { +static struct ctl_table svcrdma_table[] = { { .procname = "svc_rdma", .mode = 0555, .child = svcrdma_parm_table }, - { - .ctl_name = 0, - }, + { }, }; -static ctl_table svcrdma_root_table[] = { +static struct ctl_table svcrdma_root_table[] = { { - .ctl_name = CTL_SUNRPC, .procname = "sunrpc", .mode = 0555, .child = svcrdma_table }, - { - .ctl_name = 0, - }, + { }, }; void svc_rdma_cleanup(void) { dprintk("SVCRDMA Module Removed, deregister RPC RDMA transport\n"); - flush_scheduled_work(); + destroy_workqueue(svc_rdma_wq); if (svcrdma_table_header) { unregister_sysctl_table(svcrdma_table_header); svcrdma_table_header = NULL; @@ -258,6 +253,11 @@ int svc_rdma_init(void) dprintk("\tsq_depth : %d\n", svcrdma_max_requests * RPCRDMA_SQ_DEPTH_MULT); dprintk("\tmax_inline : %d\n", svcrdma_max_req_size); + + svc_rdma_wq = alloc_workqueue("svc_rdma", 0, 0); + if (!svc_rdma_wq) + return -ENOMEM; + if (!svcrdma_table_header) svcrdma_table_header = register_sysctl_table(svcrdma_root_table); @@ -292,6 +292,7 @@ int svc_rdma_init(void) kmem_cache_destroy(svc_rdma_map_cachep); err0: unregister_sysctl_table(svcrdma_table_header); + destroy_workqueue(svc_rdma_wq); return -ENOMEM; } MODULE_AUTHOR("Tom Tucker <tom@opengridcomputing.com>"); diff --git a/net/sunrpc/xprtrdma/svc_rdma_marshal.c b/net/sunrpc/xprtrdma/svc_rdma_marshal.c index 9530ef2d40d..65b146297f5 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_marshal.c +++ b/net/sunrpc/xprtrdma/svc_rdma_marshal.c @@ -60,21 +60,11 @@ static u32 *decode_read_list(u32 *va, u32 *vaend) struct rpcrdma_read_chunk *ch = (struct rpcrdma_read_chunk *)va; while (ch->rc_discrim != xdr_zero) { - u64 ch_offset; - if (((unsigned long)ch + sizeof(struct rpcrdma_read_chunk)) > (unsigned long)vaend) { dprintk("svcrdma: vaend=%p, ch=%p\n", vaend, ch); return NULL; } - - ch->rc_discrim = ntohl(ch->rc_discrim); - ch->rc_position = ntohl(ch->rc_position); - ch->rc_target.rs_handle = ntohl(ch->rc_target.rs_handle); - ch->rc_target.rs_length = ntohl(ch->rc_target.rs_length); - va = (u32 *)&ch->rc_target.rs_offset; - xdr_decode_hyper(va, &ch_offset); - put_unaligned(ch_offset, (u64 *)va); ch++; } return (u32 *)&ch->rc_position; @@ -91,7 +81,7 @@ void svc_rdma_rcl_chunk_counts(struct rpcrdma_read_chunk *ch, *byte_count = 0; *ch_count = 0; for (; ch->rc_discrim != 0; ch++) { - *byte_count = *byte_count + ch->rc_target.rs_length; + *byte_count = *byte_count + ntohl(ch->rc_target.rs_length); *ch_count = *ch_count + 1; } } @@ -108,7 +98,9 @@ void svc_rdma_rcl_chunk_counts(struct rpcrdma_read_chunk *ch, */ static u32 *decode_write_list(u32 *va, u32 *vaend) { - int ch_no; + unsigned long start, end; + int nchunks; + struct rpcrdma_write_array *ary = (struct rpcrdma_write_array *)va; @@ -121,37 +113,28 @@ static u32 *decode_write_list(u32 *va, u32 *vaend) dprintk("svcrdma: ary=%p, vaend=%p\n", ary, vaend); return NULL; } - ary->wc_discrim = ntohl(ary->wc_discrim); - ary->wc_nchunks = ntohl(ary->wc_nchunks); - if (((unsigned long)&ary->wc_array[0] + - (sizeof(struct rpcrdma_write_chunk) * ary->wc_nchunks)) > - (unsigned long)vaend) { + nchunks = ntohl(ary->wc_nchunks); + + start = (unsigned long)&ary->wc_array[0]; + end = (unsigned long)vaend; + if (nchunks < 0 || + nchunks > (SIZE_MAX - start) / sizeof(struct rpcrdma_write_chunk) || + (start + (sizeof(struct rpcrdma_write_chunk) * nchunks)) > end) { dprintk("svcrdma: ary=%p, wc_nchunks=%d, vaend=%p\n", - ary, ary->wc_nchunks, vaend); + ary, nchunks, vaend); return NULL; } - for (ch_no = 0; ch_no < ary->wc_nchunks; ch_no++) { - u64 ch_offset; - - ary->wc_array[ch_no].wc_target.rs_handle = - ntohl(ary->wc_array[ch_no].wc_target.rs_handle); - ary->wc_array[ch_no].wc_target.rs_length = - ntohl(ary->wc_array[ch_no].wc_target.rs_length); - va = (u32 *)&ary->wc_array[ch_no].wc_target.rs_offset; - xdr_decode_hyper(va, &ch_offset); - put_unaligned(ch_offset, (u64 *)va); - } - /* * rs_length is the 2nd 4B field in wc_target and taking its * address skips the list terminator */ - return (u32 *)&ary->wc_array[ch_no].wc_target.rs_length; + return (u32 *)&ary->wc_array[nchunks].wc_target.rs_length; } static u32 *decode_reply_array(u32 *va, u32 *vaend) { - int ch_no; + unsigned long start, end; + int nchunks; struct rpcrdma_write_array *ary = (struct rpcrdma_write_array *)va; @@ -164,28 +147,18 @@ static u32 *decode_reply_array(u32 *va, u32 *vaend) dprintk("svcrdma: ary=%p, vaend=%p\n", ary, vaend); return NULL; } - ary->wc_discrim = ntohl(ary->wc_discrim); - ary->wc_nchunks = ntohl(ary->wc_nchunks); - if (((unsigned long)&ary->wc_array[0] + - (sizeof(struct rpcrdma_write_chunk) * ary->wc_nchunks)) > - (unsigned long)vaend) { + nchunks = ntohl(ary->wc_nchunks); + + start = (unsigned long)&ary->wc_array[0]; + end = (unsigned long)vaend; + if (nchunks < 0 || + nchunks > (SIZE_MAX - start) / sizeof(struct rpcrdma_write_chunk) || + (start + (sizeof(struct rpcrdma_write_chunk) * nchunks)) > end) { dprintk("svcrdma: ary=%p, wc_nchunks=%d, vaend=%p\n", - ary, ary->wc_nchunks, vaend); + ary, nchunks, vaend); return NULL; } - for (ch_no = 0; ch_no < ary->wc_nchunks; ch_no++) { - u64 ch_offset; - - ary->wc_array[ch_no].wc_target.rs_handle = - ntohl(ary->wc_array[ch_no].wc_target.rs_handle); - ary->wc_array[ch_no].wc_target.rs_length = - ntohl(ary->wc_array[ch_no].wc_target.rs_length); - va = (u32 *)&ary->wc_array[ch_no].wc_target.rs_offset; - xdr_decode_hyper(va, &ch_offset); - put_unaligned(ch_offset, (u64 *)va); - } - - return (u32 *)&ary->wc_array[ch_no]; + return (u32 *)&ary->wc_array[nchunks]; } int svc_rdma_xdr_decode_req(struct rpcrdma_msg **rdma_req, @@ -386,13 +359,14 @@ void svc_rdma_xdr_encode_reply_array(struct rpcrdma_write_array *ary, void svc_rdma_xdr_encode_array_chunk(struct rpcrdma_write_array *ary, int chunk_no, - u32 rs_handle, u64 rs_offset, + __be32 rs_handle, + __be64 rs_offset, u32 write_len) { struct rpcrdma_segment *seg = &ary->wc_array[chunk_no].wc_target; - seg->rs_handle = htonl(rs_handle); + seg->rs_handle = rs_handle; + seg->rs_offset = rs_offset; seg->rs_length = htonl(write_len); - xdr_encode_hyper((u32 *) &seg->rs_offset, rs_offset); } void svc_rdma_xdr_encode_reply_header(struct svcxprt_rdma *xprt, diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index b4b17f44cb2..8f92a61ee2d 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved. * * This software is available to you under a choice of one of two @@ -69,7 +70,8 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, /* Set up the XDR head */ rqstp->rq_arg.head[0].iov_base = page_address(page); - rqstp->rq_arg.head[0].iov_len = min(byte_count, ctxt->sge[0].length); + rqstp->rq_arg.head[0].iov_len = + min_t(size_t, byte_count, ctxt->sge[0].length); rqstp->rq_arg.len = byte_count; rqstp->rq_arg.buflen = byte_count; @@ -85,11 +87,12 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, page = ctxt->pages[sge_no]; put_page(rqstp->rq_pages[sge_no]); rqstp->rq_pages[sge_no] = page; - bc -= min(bc, ctxt->sge[sge_no].length); + bc -= min_t(u32, bc, ctxt->sge[sge_no].length); rqstp->rq_arg.buflen += ctxt->sge[sge_no].length; sge_no++; } rqstp->rq_respages = &rqstp->rq_pages[sge_no]; + rqstp->rq_next_page = rqstp->rq_respages + 1; /* We should never run out of SGE because the limit is defined to * support the max allowed RPC data length @@ -112,271 +115,324 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, rqstp->rq_arg.tail[0].iov_len = 0; } -/* Encode a read-chunk-list as an array of IB SGE - * - * Assumptions: - * - chunk[0]->position points to pages[0] at an offset of 0 - * - pages[] is not physically or virtually contigous and consists of - * PAGE_SIZE elements. - * - * Output: - * - sge array pointing into pages[] array. - * - chunk_sge array specifying sge index and count for each - * chunk in the read list - * - */ -static int rdma_rcl_to_sge(struct svcxprt_rdma *xprt, - struct svc_rqst *rqstp, - struct svc_rdma_op_ctxt *head, - struct rpcrdma_msg *rmsgp, - struct svc_rdma_req_map *rpl_map, - struct svc_rdma_req_map *chl_map, - int ch_count, - int byte_count) +static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count) { - int sge_no; - int sge_bytes; - int page_off; - int page_no; - int ch_bytes; - int ch_no; - struct rpcrdma_read_chunk *ch; + if (rdma_node_get_transport(xprt->sc_cm_id->device->node_type) == + RDMA_TRANSPORT_IWARP) + return 1; + else + return min_t(int, sge_count, xprt->sc_max_sge); +} - sge_no = 0; - page_no = 0; - page_off = 0; - ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; - ch_no = 0; - ch_bytes = ch->rc_target.rs_length; - head->arg.head[0] = rqstp->rq_arg.head[0]; - head->arg.tail[0] = rqstp->rq_arg.tail[0]; - head->arg.pages = &head->pages[head->count]; - head->hdr_count = head->count; /* save count of hdr pages */ - head->arg.page_base = 0; - head->arg.page_len = ch_bytes; - head->arg.len = rqstp->rq_arg.len + ch_bytes; - head->arg.buflen = rqstp->rq_arg.buflen + ch_bytes; - head->count++; - chl_map->ch[0].start = 0; - while (byte_count) { - rpl_map->sge[sge_no].iov_base = - page_address(rqstp->rq_arg.pages[page_no]) + page_off; - sge_bytes = min_t(int, PAGE_SIZE-page_off, ch_bytes); - rpl_map->sge[sge_no].iov_len = sge_bytes; - /* - * Don't bump head->count here because the same page - * may be used by multiple SGE. - */ - head->arg.pages[page_no] = rqstp->rq_arg.pages[page_no]; - rqstp->rq_respages = &rqstp->rq_arg.pages[page_no+1]; +typedef int (*rdma_reader_fn)(struct svcxprt_rdma *xprt, + struct svc_rqst *rqstp, + struct svc_rdma_op_ctxt *head, + int *page_no, + u32 *page_offset, + u32 rs_handle, + u32 rs_length, + u64 rs_offset, + int last); + +/* Issue an RDMA_READ using the local lkey to map the data sink */ +static int rdma_read_chunk_lcl(struct svcxprt_rdma *xprt, + struct svc_rqst *rqstp, + struct svc_rdma_op_ctxt *head, + int *page_no, + u32 *page_offset, + u32 rs_handle, + u32 rs_length, + u64 rs_offset, + int last) +{ + struct ib_send_wr read_wr; + int pages_needed = PAGE_ALIGN(*page_offset + rs_length) >> PAGE_SHIFT; + struct svc_rdma_op_ctxt *ctxt = svc_rdma_get_context(xprt); + int ret, read, pno; + u32 pg_off = *page_offset; + u32 pg_no = *page_no; - byte_count -= sge_bytes; - ch_bytes -= sge_bytes; - sge_no++; - /* - * If all bytes for this chunk have been mapped to an - * SGE, move to the next SGE - */ - if (ch_bytes == 0) { - chl_map->ch[ch_no].count = - sge_no - chl_map->ch[ch_no].start; - ch_no++; - ch++; - chl_map->ch[ch_no].start = sge_no; - ch_bytes = ch->rc_target.rs_length; - /* If bytes remaining account for next chunk */ - if (byte_count) { - head->arg.page_len += ch_bytes; - head->arg.len += ch_bytes; - head->arg.buflen += ch_bytes; - } + ctxt->direction = DMA_FROM_DEVICE; + ctxt->read_hdr = head; + pages_needed = + min_t(int, pages_needed, rdma_read_max_sge(xprt, pages_needed)); + read = min_t(int, pages_needed << PAGE_SHIFT, rs_length); + + for (pno = 0; pno < pages_needed; pno++) { + int len = min_t(int, rs_length, PAGE_SIZE - pg_off); + + head->arg.pages[pg_no] = rqstp->rq_arg.pages[pg_no]; + head->arg.page_len += len; + head->arg.len += len; + if (!pg_off) + head->count++; + rqstp->rq_respages = &rqstp->rq_arg.pages[pg_no+1]; + rqstp->rq_next_page = rqstp->rq_respages + 1; + ctxt->sge[pno].addr = + ib_dma_map_page(xprt->sc_cm_id->device, + head->arg.pages[pg_no], pg_off, + PAGE_SIZE - pg_off, + DMA_FROM_DEVICE); + ret = ib_dma_mapping_error(xprt->sc_cm_id->device, + ctxt->sge[pno].addr); + if (ret) + goto err; + atomic_inc(&xprt->sc_dma_used); + + /* The lkey here is either a local dma lkey or a dma_mr lkey */ + ctxt->sge[pno].lkey = xprt->sc_dma_lkey; + ctxt->sge[pno].length = len; + ctxt->count++; + + /* adjust offset and wrap to next page if needed */ + pg_off += len; + if (pg_off == PAGE_SIZE) { + pg_off = 0; + pg_no++; } - /* - * If this SGE consumed all of the page, move to the - * next page - */ - if ((sge_bytes + page_off) == PAGE_SIZE) { - page_no++; - page_off = 0; - /* - * If there are still bytes left to map, bump - * the page count - */ - if (byte_count) - head->count++; - } else - page_off += sge_bytes; + rs_length -= len; + } + + if (last && rs_length == 0) + set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); + else + clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); + + memset(&read_wr, 0, sizeof(read_wr)); + read_wr.wr_id = (unsigned long)ctxt; + read_wr.opcode = IB_WR_RDMA_READ; + ctxt->wr_op = read_wr.opcode; + read_wr.send_flags = IB_SEND_SIGNALED; + read_wr.wr.rdma.rkey = rs_handle; + read_wr.wr.rdma.remote_addr = rs_offset; + read_wr.sg_list = ctxt->sge; + read_wr.num_sge = pages_needed; + + ret = svc_rdma_send(xprt, &read_wr); + if (ret) { + pr_err("svcrdma: Error %d posting RDMA_READ\n", ret); + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + goto err; } - BUG_ON(byte_count != 0); - return sge_no; + + /* return current location in page array */ + *page_no = pg_no; + *page_offset = pg_off; + ret = read; + atomic_inc(&rdma_stat_read); + return ret; + err: + svc_rdma_unmap_dma(ctxt); + svc_rdma_put_context(ctxt, 0); + return ret; } -static void rdma_set_ctxt_sge(struct svcxprt_rdma *xprt, - struct svc_rdma_op_ctxt *ctxt, - struct kvec *vec, - u64 *sgl_offset, - int count) +/* Issue an RDMA_READ using an FRMR to map the data sink */ +static int rdma_read_chunk_frmr(struct svcxprt_rdma *xprt, + struct svc_rqst *rqstp, + struct svc_rdma_op_ctxt *head, + int *page_no, + u32 *page_offset, + u32 rs_handle, + u32 rs_length, + u64 rs_offset, + int last) { - int i; + struct ib_send_wr read_wr; + struct ib_send_wr inv_wr; + struct ib_send_wr fastreg_wr; + u8 key; + int pages_needed = PAGE_ALIGN(*page_offset + rs_length) >> PAGE_SHIFT; + struct svc_rdma_op_ctxt *ctxt = svc_rdma_get_context(xprt); + struct svc_rdma_fastreg_mr *frmr = svc_rdma_get_frmr(xprt); + int ret, read, pno; + u32 pg_off = *page_offset; + u32 pg_no = *page_no; + + if (IS_ERR(frmr)) + return -ENOMEM; - ctxt->count = count; ctxt->direction = DMA_FROM_DEVICE; - for (i = 0; i < count; i++) { + ctxt->frmr = frmr; + pages_needed = min_t(int, pages_needed, xprt->sc_frmr_pg_list_len); + read = min_t(int, pages_needed << PAGE_SHIFT, rs_length); + + frmr->kva = page_address(rqstp->rq_arg.pages[pg_no]); + frmr->direction = DMA_FROM_DEVICE; + frmr->access_flags = (IB_ACCESS_LOCAL_WRITE|IB_ACCESS_REMOTE_WRITE); + frmr->map_len = pages_needed << PAGE_SHIFT; + frmr->page_list_len = pages_needed; + + for (pno = 0; pno < pages_needed; pno++) { + int len = min_t(int, rs_length, PAGE_SIZE - pg_off); + + head->arg.pages[pg_no] = rqstp->rq_arg.pages[pg_no]; + head->arg.page_len += len; + head->arg.len += len; + if (!pg_off) + head->count++; + rqstp->rq_respages = &rqstp->rq_arg.pages[pg_no+1]; + rqstp->rq_next_page = rqstp->rq_respages + 1; + frmr->page_list->page_list[pno] = + ib_dma_map_page(xprt->sc_cm_id->device, + head->arg.pages[pg_no], 0, + PAGE_SIZE, DMA_FROM_DEVICE); + ret = ib_dma_mapping_error(xprt->sc_cm_id->device, + frmr->page_list->page_list[pno]); + if (ret) + goto err; atomic_inc(&xprt->sc_dma_used); - ctxt->sge[i].addr = - ib_dma_map_single(xprt->sc_cm_id->device, - vec[i].iov_base, vec[i].iov_len, - DMA_FROM_DEVICE); - ctxt->sge[i].length = vec[i].iov_len; - ctxt->sge[i].lkey = xprt->sc_phys_mr->lkey; - *sgl_offset = *sgl_offset + vec[i].iov_len; + + /* adjust offset and wrap to next page if needed */ + pg_off += len; + if (pg_off == PAGE_SIZE) { + pg_off = 0; + pg_no++; + } + rs_length -= len; } -} -static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count) -{ - if ((RDMA_TRANSPORT_IWARP == - rdma_node_get_transport(xprt->sc_cm_id-> - device->node_type)) - && sge_count > 1) - return 1; + if (last && rs_length == 0) + set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); else - return min_t(int, sge_count, xprt->sc_max_sge); + clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); + + /* Bump the key */ + key = (u8)(frmr->mr->lkey & 0x000000FF); + ib_update_fast_reg_key(frmr->mr, ++key); + + ctxt->sge[0].addr = (unsigned long)frmr->kva + *page_offset; + ctxt->sge[0].lkey = frmr->mr->lkey; + ctxt->sge[0].length = read; + ctxt->count = 1; + ctxt->read_hdr = head; + + /* Prepare FASTREG WR */ + memset(&fastreg_wr, 0, sizeof(fastreg_wr)); + fastreg_wr.opcode = IB_WR_FAST_REG_MR; + fastreg_wr.send_flags = IB_SEND_SIGNALED; + fastreg_wr.wr.fast_reg.iova_start = (unsigned long)frmr->kva; + fastreg_wr.wr.fast_reg.page_list = frmr->page_list; + fastreg_wr.wr.fast_reg.page_list_len = frmr->page_list_len; + fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT; + fastreg_wr.wr.fast_reg.length = frmr->map_len; + fastreg_wr.wr.fast_reg.access_flags = frmr->access_flags; + fastreg_wr.wr.fast_reg.rkey = frmr->mr->lkey; + fastreg_wr.next = &read_wr; + + /* Prepare RDMA_READ */ + memset(&read_wr, 0, sizeof(read_wr)); + read_wr.send_flags = IB_SEND_SIGNALED; + read_wr.wr.rdma.rkey = rs_handle; + read_wr.wr.rdma.remote_addr = rs_offset; + read_wr.sg_list = ctxt->sge; + read_wr.num_sge = 1; + if (xprt->sc_dev_caps & SVCRDMA_DEVCAP_READ_W_INV) { + read_wr.opcode = IB_WR_RDMA_READ_WITH_INV; + read_wr.wr_id = (unsigned long)ctxt; + read_wr.ex.invalidate_rkey = ctxt->frmr->mr->lkey; + } else { + read_wr.opcode = IB_WR_RDMA_READ; + read_wr.next = &inv_wr; + /* Prepare invalidate */ + memset(&inv_wr, 0, sizeof(inv_wr)); + inv_wr.wr_id = (unsigned long)ctxt; + inv_wr.opcode = IB_WR_LOCAL_INV; + inv_wr.send_flags = IB_SEND_SIGNALED | IB_SEND_FENCE; + inv_wr.ex.invalidate_rkey = frmr->mr->lkey; + } + ctxt->wr_op = read_wr.opcode; + + /* Post the chain */ + ret = svc_rdma_send(xprt, &fastreg_wr); + if (ret) { + pr_err("svcrdma: Error %d posting RDMA_READ\n", ret); + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + goto err; + } + + /* return current location in page array */ + *page_no = pg_no; + *page_offset = pg_off; + ret = read; + atomic_inc(&rdma_stat_read); + return ret; + err: + svc_rdma_unmap_dma(ctxt); + svc_rdma_put_context(ctxt, 0); + svc_rdma_put_frmr(xprt, frmr); + return ret; } -/* - * Use RDMA_READ to read data from the advertised client buffer into the - * XDR stream starting at rq_arg.head[0].iov_base. - * Each chunk in the array - * contains the following fields: - * discrim - '1', This isn't used for data placement - * position - The xdr stream offset (the same for every chunk) - * handle - RMR for client memory region - * length - data transfer length - * offset - 64 bit tagged offset in remote memory region - * - * On our side, we need to read into a pagelist. The first page immediately - * follows the RPC header. - * - * This function returns: - * 0 - No error and no read-list found. - * - * 1 - Successful read-list processing. The data is not yet in - * the pagelist and therefore the RPC request must be deferred. The - * I/O completion will enqueue the transport again and - * svc_rdma_recvfrom will complete the request. - * - * <0 - Error processing/posting read-list. - * - * NOTE: The ctxt must not be touched after the last WR has been posted - * because the I/O completion processing may occur on another - * processor and free / modify the context. Ne touche pas! - */ -static int rdma_read_xdr(struct svcxprt_rdma *xprt, - struct rpcrdma_msg *rmsgp, - struct svc_rqst *rqstp, - struct svc_rdma_op_ctxt *hdr_ctxt) +static int rdma_read_chunks(struct svcxprt_rdma *xprt, + struct rpcrdma_msg *rmsgp, + struct svc_rqst *rqstp, + struct svc_rdma_op_ctxt *head) { - struct ib_send_wr read_wr; - int err = 0; - int ch_no; - int ch_count; - int byte_count; - int sge_count; - u64 sgl_offset; + int page_no, ch_count, ret; struct rpcrdma_read_chunk *ch; - struct svc_rdma_op_ctxt *ctxt = NULL; - struct svc_rdma_req_map *rpl_map; - struct svc_rdma_req_map *chl_map; + u32 page_offset, byte_count; + u64 rs_offset; + rdma_reader_fn reader; /* If no read list is present, return 0 */ ch = svc_rdma_get_read_chunk(rmsgp); if (!ch) return 0; - /* Allocate temporary reply and chunk maps */ - rpl_map = svc_rdma_get_req_map(); - chl_map = svc_rdma_get_req_map(); - svc_rdma_rcl_chunk_counts(ch, &ch_count, &byte_count); if (ch_count > RPCSVC_MAXPAGES) return -EINVAL; - sge_count = rdma_rcl_to_sge(xprt, rqstp, hdr_ctxt, rmsgp, - rpl_map, chl_map, - ch_count, byte_count); - sgl_offset = 0; - ch_no = 0; - for (ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; - ch->rc_discrim != 0; ch++, ch_no++) { -next_sge: - ctxt = svc_rdma_get_context(xprt); - ctxt->direction = DMA_FROM_DEVICE; - clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); + /* The request is completed when the RDMA_READs complete. The + * head context keeps all the pages that comprise the + * request. + */ + head->arg.head[0] = rqstp->rq_arg.head[0]; + head->arg.tail[0] = rqstp->rq_arg.tail[0]; + head->arg.pages = &head->pages[head->count]; + head->hdr_count = head->count; + head->arg.page_base = 0; + head->arg.page_len = 0; + head->arg.len = rqstp->rq_arg.len; + head->arg.buflen = rqstp->rq_arg.buflen; - /* Prepare READ WR */ - memset(&read_wr, 0, sizeof read_wr); - ctxt->wr_op = IB_WR_RDMA_READ; - read_wr.wr_id = (unsigned long)ctxt; - read_wr.opcode = IB_WR_RDMA_READ; - read_wr.send_flags = IB_SEND_SIGNALED; - read_wr.wr.rdma.rkey = ch->rc_target.rs_handle; - read_wr.wr.rdma.remote_addr = - get_unaligned(&(ch->rc_target.rs_offset)) + - sgl_offset; - read_wr.sg_list = ctxt->sge; - read_wr.num_sge = - rdma_read_max_sge(xprt, chl_map->ch[ch_no].count); - rdma_set_ctxt_sge(xprt, ctxt, - &rpl_map->sge[chl_map->ch[ch_no].start], - &sgl_offset, - read_wr.num_sge); - if (((ch+1)->rc_discrim == 0) && - (read_wr.num_sge == chl_map->ch[ch_no].count)) { - /* - * Mark the last RDMA_READ with a bit to - * indicate all RPC data has been fetched from - * the client and the RPC needs to be enqueued. - */ - set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); - ctxt->read_hdr = hdr_ctxt; - } - /* Post the read */ - err = svc_rdma_send(xprt, &read_wr); - if (err) { - printk(KERN_ERR "svcrdma: Error %d posting RDMA_READ\n", - err); - set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); - svc_rdma_put_context(ctxt, 0); - goto out; - } - atomic_inc(&rdma_stat_read); + /* Use FRMR if supported */ + if (xprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG) + reader = rdma_read_chunk_frmr; + else + reader = rdma_read_chunk_lcl; - if (read_wr.num_sge < chl_map->ch[ch_no].count) { - chl_map->ch[ch_no].count -= read_wr.num_sge; - chl_map->ch[ch_no].start += read_wr.num_sge; - goto next_sge; + page_no = 0; page_offset = 0; + for (ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; + ch->rc_discrim != 0; ch++) { + + xdr_decode_hyper((__be32 *)&ch->rc_target.rs_offset, + &rs_offset); + byte_count = ntohl(ch->rc_target.rs_length); + + while (byte_count > 0) { + ret = reader(xprt, rqstp, head, + &page_no, &page_offset, + ntohl(ch->rc_target.rs_handle), + byte_count, rs_offset, + ((ch+1)->rc_discrim == 0) /* last */ + ); + if (ret < 0) + goto err; + byte_count -= ret; + rs_offset += ret; + head->arg.buflen += ret; } - sgl_offset = 0; - err = 1; } - - out: - svc_rdma_put_req_map(rpl_map); - svc_rdma_put_req_map(chl_map); - + ret = 1; + err: /* Detach arg pages. svc_recv will replenish them */ - for (ch_no = 0; &rqstp->rq_pages[ch_no] < rqstp->rq_respages; ch_no++) - rqstp->rq_pages[ch_no] = NULL; + for (page_no = 0; + &rqstp->rq_pages[page_no] < rqstp->rq_respages; page_no++) + rqstp->rq_pages[page_no] = NULL; - /* - * Detach res pages. svc_release must see a resused count of - * zero or it will attempt to put them. - */ - while (rqstp->rq_resused) - rqstp->rq_respages[--rqstp->rq_resused] = NULL; - - return err; + return ret; } static int rdma_read_complete(struct svc_rqst *rqstp, @@ -399,7 +455,7 @@ static int rdma_read_complete(struct svc_rqst *rqstp, /* rq_respages starts after the last arg page */ rqstp->rq_respages = &rqstp->rq_arg.pages[page_no]; - rqstp->rq_resused = 0; + rqstp->rq_next_page = rqstp->rq_respages + 1; /* Rebuild rq_arg head and tail. */ rqstp->rq_arg.head[0] = head->arg.head[0]; @@ -422,7 +478,6 @@ static int rdma_read_complete(struct svc_rqst *rqstp, ret, rqstp->rq_arg.len, rqstp->rq_arg.head[0].iov_base, rqstp->rq_arg.head[0].iov_len); - svc_xprt_received(rqstp->rq_xprt); return ret; } @@ -443,19 +498,15 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) dprintk("svcrdma: rqstp=%p\n", rqstp); - spin_lock_bh(&rdma_xprt->sc_read_complete_lock); + spin_lock_bh(&rdma_xprt->sc_rq_dto_lock); if (!list_empty(&rdma_xprt->sc_read_complete_q)) { ctxt = list_entry(rdma_xprt->sc_read_complete_q.next, struct svc_rdma_op_ctxt, dto_q); list_del_init(&ctxt->dto_q); - } - spin_unlock_bh(&rdma_xprt->sc_read_complete_lock); - if (ctxt) + spin_unlock_bh(&rdma_xprt->sc_rq_dto_lock); return rdma_read_complete(rqstp, ctxt); - - spin_lock_bh(&rdma_xprt->sc_rq_dto_lock); - if (!list_empty(&rdma_xprt->sc_rq_dto_q)) { + } else if (!list_empty(&rdma_xprt->sc_rq_dto_q)) { ctxt = list_entry(rdma_xprt->sc_rq_dto_q.next, struct svc_rdma_op_ctxt, dto_q); @@ -475,7 +526,6 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) goto close_out; - BUG_ON(ret); goto out; } dprintk("svcrdma: processing ctxt=%p on xprt=%p, rqstp=%p, status=%d\n", @@ -498,13 +548,11 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) } /* Read read-list data. */ - ret = rdma_read_xdr(rdma_xprt, rmsgp, rqstp, ctxt); + ret = rdma_read_chunks(rdma_xprt, rmsgp, rqstp, ctxt); if (ret > 0) { /* read-list posted, defer until data received from client. */ - svc_xprt_received(xprt); - return 0; - } - if (ret < 0) { + goto defer; + } else if (ret < 0) { /* Post of read-list failed, free context. */ svc_rdma_put_context(ctxt, 1); return 0; @@ -522,7 +570,6 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) rqstp->rq_arg.head[0].iov_len); rqstp->rq_prot = IPPROTO_MAX; svc_xprt_copy_addrs(rqstp, xprt); - svc_xprt_received(xprt); return ret; close_out: @@ -534,6 +581,6 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) * close bit and call svc_xprt_delete */ set_bit(XPT_CLOSE, &xprt->xpt_flags); - svc_xprt_received(xprt); +defer: return 0; } diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c index 84d328329d9..49fd21a5c21 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved. * * This software is available to you under a choice of one of two @@ -49,31 +50,10 @@ #define RPCDBG_FACILITY RPCDBG_SVCXPRT -/* Encode an XDR as an array of IB SGE - * - * Assumptions: - * - head[0] is physically contiguous. - * - tail[0] is physically contiguous. - * - pages[] is not physically or virtually contigous and consists of - * PAGE_SIZE elements. - * - * Output: - * SGE[0] reserved for RCPRDMA header - * SGE[1] data from xdr->head[] - * SGE[2..sge_count-2] data from xdr->pages[] - * SGE[sge_count-1] data from xdr->tail. - * - * The max SGE we need is the length of the XDR / pagesize + one for - * head + one for tail + one for RPCRDMA header. Since RPCSVC_MAXPAGES - * reserves a page for both the request and the reply header, and this - * array is only concerned with the reply we are assured that we have - * on extra page for the RPCRMDA header. - */ -static void xdr_to_sge(struct svcxprt_rdma *xprt, - struct xdr_buf *xdr, - struct svc_rdma_req_map *vec) +static int map_xdr(struct svcxprt_rdma *xprt, + struct xdr_buf *xdr, + struct svc_rdma_req_map *vec) { - int sge_max = (xdr->len+PAGE_SIZE-1) / PAGE_SIZE + 3; int sge_no; u32 sge_bytes; u32 page_bytes; @@ -114,8 +94,43 @@ static void xdr_to_sge(struct svcxprt_rdma *xprt, sge_no++; } - BUG_ON(sge_no > sge_max); + dprintk("svcrdma: map_xdr: sge_no %d page_no %d " + "page_base %u page_len %u head_len %zu tail_len %zu\n", + sge_no, page_no, xdr->page_base, xdr->page_len, + xdr->head[0].iov_len, xdr->tail[0].iov_len); + vec->count = sge_no; + return 0; +} + +static dma_addr_t dma_map_xdr(struct svcxprt_rdma *xprt, + struct xdr_buf *xdr, + u32 xdr_off, size_t len, int dir) +{ + struct page *page; + dma_addr_t dma_addr; + if (xdr_off < xdr->head[0].iov_len) { + /* This offset is in the head */ + xdr_off += (unsigned long)xdr->head[0].iov_base & ~PAGE_MASK; + page = virt_to_page(xdr->head[0].iov_base); + } else { + xdr_off -= xdr->head[0].iov_len; + if (xdr_off < xdr->page_len) { + /* This offset is in the page list */ + xdr_off += xdr->page_base; + page = xdr->pages[xdr_off >> PAGE_SHIFT]; + xdr_off &= ~PAGE_MASK; + } else { + /* This offset is in the tail */ + xdr_off -= xdr->page_len; + xdr_off += (unsigned long) + xdr->tail[0].iov_base & ~PAGE_MASK; + page = virt_to_page(xdr->tail[0].iov_base); + } + } + dma_addr = ib_dma_map_page(xprt->sc_cm_id->device, page, xdr_off, + min_t(size_t, PAGE_SIZE, len), dir); + return dma_addr; } /* Assumptions: @@ -158,30 +173,27 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, sge_no = 0; /* Copy the remaining SGE */ - while (bc != 0 && xdr_sge_no < vec->count) { - sge[sge_no].lkey = xprt->sc_phys_mr->lkey; - sge_bytes = min((size_t)bc, - (size_t)(vec->sge[xdr_sge_no].iov_len-sge_off)); + while (bc != 0) { + sge_bytes = min_t(size_t, + bc, vec->sge[xdr_sge_no].iov_len-sge_off); sge[sge_no].length = sge_bytes; - atomic_inc(&xprt->sc_dma_used); sge[sge_no].addr = - ib_dma_map_single(xprt->sc_cm_id->device, - (void *) - vec->sge[xdr_sge_no].iov_base + sge_off, - sge_bytes, DMA_TO_DEVICE); - if (dma_mapping_error(xprt->sc_cm_id->device->dma_device, - sge[sge_no].addr)) + dma_map_xdr(xprt, &rqstp->rq_res, xdr_off, + sge_bytes, DMA_TO_DEVICE); + xdr_off += sge_bytes; + if (ib_dma_mapping_error(xprt->sc_cm_id->device, + sge[sge_no].addr)) goto err; + atomic_inc(&xprt->sc_dma_used); + sge[sge_no].lkey = xprt->sc_dma_lkey; + ctxt->count++; sge_off = 0; sge_no++; - ctxt->count++; xdr_sge_no++; + BUG_ON(xdr_sge_no > vec->count); bc -= sge_bytes; } - BUG_ON(bc != 0); - BUG_ON(xdr_sge_no > vec->count); - /* Prepare WRITE WR */ memset(&write_wr, 0, sizeof write_wr); ctxt->wr_op = IB_WR_RDMA_WRITE; @@ -199,6 +211,7 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, goto err; return 0; err: + svc_rdma_unmap_dma(ctxt); svc_rdma_put_context(ctxt, 0); /* Fatal error, close transport */ return -EIO; @@ -236,21 +249,21 @@ static int send_write_chunks(struct svcxprt_rdma *xprt, u64 rs_offset; arg_ch = &arg_ary->wc_array[chunk_no].wc_target; - write_len = min(xfer_len, arg_ch->rs_length); + write_len = min(xfer_len, ntohl(arg_ch->rs_length)); /* Prepare the response chunk given the length actually * written */ - rs_offset = get_unaligned(&(arg_ch->rs_offset)); + xdr_decode_hyper((__be32 *)&arg_ch->rs_offset, &rs_offset); svc_rdma_xdr_encode_array_chunk(res_ary, chunk_no, - arg_ch->rs_handle, - rs_offset, - write_len); + arg_ch->rs_handle, + arg_ch->rs_offset, + write_len); chunk_off = 0; while (write_len) { int this_write; this_write = min(write_len, max_write); ret = send_write(xprt, rqstp, - arg_ch->rs_handle, + ntohl(arg_ch->rs_handle), rs_offset + chunk_off, xdr_off, this_write, @@ -284,6 +297,7 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt, u32 xdr_off; int chunk_no; int chunk_off; + int nchunks; struct rpcrdma_segment *ch; struct rpcrdma_write_array *arg_ary; struct rpcrdma_write_array *res_ary; @@ -300,27 +314,27 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt, max_write = xprt->sc_max_sge * PAGE_SIZE; /* xdr offset starts at RPC message */ + nchunks = ntohl(arg_ary->wc_nchunks); for (xdr_off = 0, chunk_no = 0; - xfer_len && chunk_no < arg_ary->wc_nchunks; + xfer_len && chunk_no < nchunks; chunk_no++) { u64 rs_offset; ch = &arg_ary->wc_array[chunk_no].wc_target; - write_len = min(xfer_len, ch->rs_length); - + write_len = min(xfer_len, htonl(ch->rs_length)); /* Prepare the reply chunk given the length actually * written */ - rs_offset = get_unaligned(&(ch->rs_offset)); + xdr_decode_hyper((__be32 *)&ch->rs_offset, &rs_offset); svc_rdma_xdr_encode_array_chunk(res_ary, chunk_no, - ch->rs_handle, rs_offset, - write_len); + ch->rs_handle, ch->rs_offset, + write_len); chunk_off = 0; while (write_len) { int this_write; this_write = min(write_len, max_write); ret = send_write(xprt, rqstp, - ch->rs_handle, + ntohl(ch->rs_handle), rs_offset + chunk_off, xdr_off, this_write, @@ -355,7 +369,8 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt, * In all three cases, this function prepares the RPCRDMA header in * sge[0], the 'type' parameter indicates the type to place in the * RPCRDMA header, and the 'byte_count' field indicates how much of - * the XDR to include in this RDMA_SEND. + * the XDR to include in this RDMA_SEND. NB: The offset of the payload + * to send is zero in the XDR. */ static int send_reply(struct svcxprt_rdma *rdma, struct svc_rqst *rqstp, @@ -369,6 +384,7 @@ static int send_reply(struct svcxprt_rdma *rdma, int sge_no; int sge_bytes; int page_no; + int pages; int ret; /* Post a recv buffer to handle another request. */ @@ -387,25 +403,32 @@ static int send_reply(struct svcxprt_rdma *rdma, ctxt->count = 1; /* Prepare the SGE for the RPCRDMA Header */ - atomic_inc(&rdma->sc_dma_used); + ctxt->sge[0].lkey = rdma->sc_dma_lkey; + ctxt->sge[0].length = svc_rdma_xdr_get_reply_hdr_len(rdma_resp); ctxt->sge[0].addr = - ib_dma_map_page(rdma->sc_cm_id->device, - page, 0, PAGE_SIZE, DMA_TO_DEVICE); + ib_dma_map_page(rdma->sc_cm_id->device, page, 0, + ctxt->sge[0].length, DMA_TO_DEVICE); + if (ib_dma_mapping_error(rdma->sc_cm_id->device, ctxt->sge[0].addr)) + goto err; + atomic_inc(&rdma->sc_dma_used); + ctxt->direction = DMA_TO_DEVICE; - ctxt->sge[0].length = svc_rdma_xdr_get_reply_hdr_len(rdma_resp); - ctxt->sge[0].lkey = rdma->sc_phys_mr->lkey; - /* Determine how many of our SGE are to be transmitted */ + /* Map the payload indicated by 'byte_count' */ for (sge_no = 1; byte_count && sge_no < vec->count; sge_no++) { + int xdr_off = 0; sge_bytes = min_t(size_t, vec->sge[sge_no].iov_len, byte_count); byte_count -= sge_bytes; - atomic_inc(&rdma->sc_dma_used); ctxt->sge[sge_no].addr = - ib_dma_map_single(rdma->sc_cm_id->device, - vec->sge[sge_no].iov_base, - sge_bytes, DMA_TO_DEVICE); + dma_map_xdr(rdma, &rqstp->rq_res, xdr_off, + sge_bytes, DMA_TO_DEVICE); + xdr_off += sge_bytes; + if (ib_dma_mapping_error(rdma->sc_cm_id->device, + ctxt->sge[sge_no].addr)) + goto err; + atomic_inc(&rdma->sc_dma_used); + ctxt->sge[sge_no].lkey = rdma->sc_dma_lkey; ctxt->sge[sge_no].length = sge_bytes; - ctxt->sge[sge_no].lkey = rdma->sc_phys_mr->lkey; } BUG_ON(byte_count != 0); @@ -413,14 +436,21 @@ static int send_reply(struct svcxprt_rdma *rdma, * respages array. They are our pages until the I/O * completes. */ - for (page_no = 0; page_no < rqstp->rq_resused; page_no++) { + pages = rqstp->rq_next_page - rqstp->rq_respages; + for (page_no = 0; page_no < pages; page_no++) { ctxt->pages[page_no+1] = rqstp->rq_respages[page_no]; ctxt->count++; rqstp->rq_respages[page_no] = NULL; - /* If there are more pages than SGE, terminate SGE list */ + /* + * If there are more pages than SGE, terminate SGE + * list so that svc_rdma_unmap_dma doesn't attempt to + * unmap garbage. + */ if (page_no+1 >= sge_no) ctxt->sge[page_no+1].length = 0; } + rqstp->rq_next_page = rqstp->rq_respages + 1; + BUG_ON(sge_no > rdma->sc_max_sge); memset(&send_wr, 0, sizeof send_wr); ctxt->wr_op = IB_WR_SEND; @@ -432,9 +462,14 @@ static int send_reply(struct svcxprt_rdma *rdma, ret = svc_rdma_send(rdma, &send_wr); if (ret) - svc_rdma_put_context(ctxt, 1); + goto err; - return ret; + return 0; + + err: + svc_rdma_unmap_dma(ctxt); + svc_rdma_put_context(ctxt, 1); + return -EIO; } void svc_rdma_prep_reply_hdr(struct svc_rqst *rqstp) @@ -477,8 +512,9 @@ int svc_rdma_sendto(struct svc_rqst *rqstp) ctxt = svc_rdma_get_context(rdma); ctxt->direction = DMA_TO_DEVICE; vec = svc_rdma_get_req_map(); - xdr_to_sge(rdma, &rqstp->rq_res, vec); - + ret = map_xdr(rdma, &rqstp->rq_res, vec); + if (ret) + goto err0; inline_bytes = rqstp->rq_res.len; /* Create the RDMA response header */ @@ -498,7 +534,7 @@ int svc_rdma_sendto(struct svc_rqst *rqstp) if (ret < 0) { printk(KERN_ERR "svcrdma: failed to send write chunks, rc=%d\n", ret); - goto error; + goto err1; } inline_bytes -= ret; @@ -508,7 +544,7 @@ int svc_rdma_sendto(struct svc_rqst *rqstp) if (ret < 0) { printk(KERN_ERR "svcrdma: failed to send reply chunks, rc=%d\n", ret); - goto error; + goto err1; } inline_bytes -= ret; @@ -517,9 +553,11 @@ int svc_rdma_sendto(struct svc_rqst *rqstp) svc_rdma_put_req_map(vec); dprintk("svcrdma: send_reply returns %d\n", ret); return ret; - error: + + err1: + put_page(res_page); + err0: svc_rdma_put_req_map(vec); svc_rdma_put_context(ctxt, 0); - put_page(res_page); return ret; } diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 19ddc382b77..e7323fbbd34 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. * Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved. * * This software is available to you under a choice of one of two @@ -42,14 +43,21 @@ #include <linux/sunrpc/svc_xprt.h> #include <linux/sunrpc/debug.h> #include <linux/sunrpc/rpc_rdma.h> +#include <linux/interrupt.h> +#include <linux/sched.h> +#include <linux/slab.h> #include <linux/spinlock.h> +#include <linux/workqueue.h> #include <rdma/ib_verbs.h> #include <rdma/rdma_cm.h> #include <linux/sunrpc/svc_rdma.h> +#include <linux/export.h> +#include "xprt_rdma.h" #define RPCDBG_FACILITY RPCDBG_SVCXPRT static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, + struct net *net, struct sockaddr *sa, int salen, int flags); static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt); @@ -58,10 +66,11 @@ static void dto_tasklet_func(unsigned long data); static void svc_rdma_detach(struct svc_xprt *xprt); static void svc_rdma_free(struct svc_xprt *xprt); static int svc_rdma_has_wspace(struct svc_xprt *xprt); +static int svc_rdma_secure_port(struct svc_rqst *); static void rq_cq_reap(struct svcxprt_rdma *xprt); static void sq_cq_reap(struct svcxprt_rdma *xprt); -DECLARE_TASKLET(dto_tasklet, dto_tasklet_func, 0UL); +static DECLARE_TASKLET(dto_tasklet, dto_tasklet_func, 0UL); static DEFINE_SPINLOCK(dto_lock); static LIST_HEAD(dto_xprt_q); @@ -75,6 +84,7 @@ static struct svc_xprt_ops svc_rdma_ops = { .xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr, .xpo_has_wspace = svc_rdma_has_wspace, .xpo_accept = svc_rdma_accept, + .xpo_secure_port = svc_rdma_secure_port, }; struct svc_xprt_class svc_rdma_class = { @@ -84,9 +94,6 @@ struct svc_xprt_class svc_rdma_class = { .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP, }; -/* WR context cache. Created in svc_rdma.c */ -extern struct kmem_cache *svc_rdma_ctxt_cachep; - struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt) { struct svc_rdma_op_ctxt *ctxt; @@ -100,20 +107,29 @@ struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt) ctxt->xprt = xprt; INIT_LIST_HEAD(&ctxt->dto_q); ctxt->count = 0; + ctxt->frmr = NULL; atomic_inc(&xprt->sc_ctxt_used); return ctxt; } -static void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt) +void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt) { struct svcxprt_rdma *xprt = ctxt->xprt; int i; for (i = 0; i < ctxt->count && ctxt->sge[i].length; i++) { - atomic_dec(&xprt->sc_dma_used); - ib_dma_unmap_single(xprt->sc_cm_id->device, - ctxt->sge[i].addr, - ctxt->sge[i].length, - ctxt->direction); + /* + * Unmap the DMA addr in the SGE if the lkey matches + * the sc_dma_lkey, otherwise, ignore it since it is + * an FRMR lkey and will be unmapped later when the + * last WR that uses it completes. + */ + if (ctxt->sge[i].lkey == xprt->sc_dma_lkey) { + atomic_dec(&xprt->sc_dma_used); + ib_dma_unmap_page(xprt->sc_cm_id->device, + ctxt->sge[i].addr, + ctxt->sge[i].length, + ctxt->direction); + } } } @@ -132,9 +148,6 @@ void svc_rdma_put_context(struct svc_rdma_op_ctxt *ctxt, int free_pages) atomic_dec(&xprt->sc_ctxt_used); } -/* Temporary NFS request map cache. Created in svc_rdma.c */ -extern struct kmem_cache *svc_rdma_map_cachep; - /* * Temporary NFS req mappings are shared across all transport * instances. These are short lived and should be bounded by the number @@ -316,6 +329,50 @@ static void rq_cq_reap(struct svcxprt_rdma *xprt) } /* + * Process a completion context + */ +static void process_context(struct svcxprt_rdma *xprt, + struct svc_rdma_op_ctxt *ctxt) +{ + svc_rdma_unmap_dma(ctxt); + + switch (ctxt->wr_op) { + case IB_WR_SEND: + BUG_ON(ctxt->frmr); + svc_rdma_put_context(ctxt, 1); + break; + + case IB_WR_RDMA_WRITE: + BUG_ON(ctxt->frmr); + svc_rdma_put_context(ctxt, 0); + break; + + case IB_WR_RDMA_READ: + case IB_WR_RDMA_READ_WITH_INV: + svc_rdma_put_frmr(xprt, ctxt->frmr); + if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) { + struct svc_rdma_op_ctxt *read_hdr = ctxt->read_hdr; + BUG_ON(!read_hdr); + spin_lock_bh(&xprt->sc_rq_dto_lock); + set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags); + list_add_tail(&read_hdr->dto_q, + &xprt->sc_read_complete_q); + spin_unlock_bh(&xprt->sc_rq_dto_lock); + svc_xprt_enqueue(&xprt->sc_xprt); + } + svc_rdma_put_context(ctxt, 0); + break; + + default: + BUG_ON(1); + printk(KERN_ERR "svcrdma: unexpected completion type, " + "opcode=%d\n", + ctxt->wr_op); + break; + } +} + +/* * Send Queue Completion Handler - potentially called on interrupt context. * * Note that caller must hold a transport reference. @@ -323,59 +380,42 @@ static void rq_cq_reap(struct svcxprt_rdma *xprt) static void sq_cq_reap(struct svcxprt_rdma *xprt) { struct svc_rdma_op_ctxt *ctxt = NULL; - struct ib_wc wc; + struct ib_wc wc_a[6]; + struct ib_wc *wc; struct ib_cq *cq = xprt->sc_sq_cq; int ret; + memset(wc_a, 0, sizeof(wc_a)); if (!test_and_clear_bit(RDMAXPRT_SQ_PENDING, &xprt->sc_flags)) return; ib_req_notify_cq(xprt->sc_sq_cq, IB_CQ_NEXT_COMP); atomic_inc(&rdma_stat_sq_poll); - while ((ret = ib_poll_cq(cq, 1, &wc)) > 0) { - ctxt = (struct svc_rdma_op_ctxt *)(unsigned long)wc.wr_id; - xprt = ctxt->xprt; - - svc_rdma_unmap_dma(ctxt); - if (wc.status != IB_WC_SUCCESS) - /* Close the transport */ - set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + while ((ret = ib_poll_cq(cq, ARRAY_SIZE(wc_a), wc_a)) > 0) { + int i; - /* Decrement used SQ WR count */ - atomic_dec(&xprt->sc_sq_count); - wake_up(&xprt->sc_send_wait); + for (i = 0; i < ret; i++) { + wc = &wc_a[i]; + if (wc->status != IB_WC_SUCCESS) { + dprintk("svcrdma: sq wc err status %d\n", + wc->status); - switch (ctxt->wr_op) { - case IB_WR_SEND: - svc_rdma_put_context(ctxt, 1); - break; + /* Close the transport */ + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + } - case IB_WR_RDMA_WRITE: - svc_rdma_put_context(ctxt, 0); - break; + /* Decrement used SQ WR count */ + atomic_dec(&xprt->sc_sq_count); + wake_up(&xprt->sc_send_wait); - case IB_WR_RDMA_READ: - if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) { - struct svc_rdma_op_ctxt *read_hdr = ctxt->read_hdr; - BUG_ON(!read_hdr); - set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags); - spin_lock_bh(&xprt->sc_read_complete_lock); - list_add_tail(&read_hdr->dto_q, - &xprt->sc_read_complete_q); - spin_unlock_bh(&xprt->sc_read_complete_lock); - svc_xprt_enqueue(&xprt->sc_xprt); - } - svc_rdma_put_context(ctxt, 0); - break; + ctxt = (struct svc_rdma_op_ctxt *) + (unsigned long)wc->wr_id; + if (ctxt) + process_context(xprt, ctxt); - default: - printk(KERN_ERR "svcrdma: unexpected completion type, " - "opcode=%d, status=%d\n", - wc.opcode, wc.status); - break; + svc_xprt_put(&xprt->sc_xprt); } - svc_xprt_put(&xprt->sc_xprt); } if (ctxt) @@ -420,16 +460,17 @@ static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv, if (!cma_xprt) return NULL; - svc_xprt_init(&svc_rdma_class, &cma_xprt->sc_xprt, serv); + svc_xprt_init(&init_net, &svc_rdma_class, &cma_xprt->sc_xprt, serv); INIT_LIST_HEAD(&cma_xprt->sc_accept_q); INIT_LIST_HEAD(&cma_xprt->sc_dto_q); INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q); INIT_LIST_HEAD(&cma_xprt->sc_read_complete_q); + INIT_LIST_HEAD(&cma_xprt->sc_frmr_q); init_waitqueue_head(&cma_xprt->sc_send_wait); spin_lock_init(&cma_xprt->sc_lock); - spin_lock_init(&cma_xprt->sc_read_complete_lock); spin_lock_init(&cma_xprt->sc_rq_dto_lock); + spin_lock_init(&cma_xprt->sc_frmr_q_lock); cma_xprt->sc_ord = svcrdma_ord; @@ -451,8 +492,7 @@ struct page *svc_rdma_get_page(void) while ((page = alloc_page(GFP_KERNEL)) == NULL) { /* If we can't get memory, wait a bit and try again */ - printk(KERN_INFO "svcrdma: out of memory...retrying in 1000 " - "jiffies.\n"); + printk(KERN_INFO "svcrdma: out of memory...retrying in 1s\n"); schedule_timeout_uninterruptible(msecs_to_jiffies(1000)); } return page; @@ -463,7 +503,7 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt) struct ib_recv_wr recv_wr, *bad_recv_wr; struct svc_rdma_op_ctxt *ctxt; struct page *page; - unsigned long pa; + dma_addr_t pa; int sge_no; int buflen; int ret; @@ -475,16 +515,18 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt) BUG_ON(sge_no >= xprt->sc_max_sge); page = svc_rdma_get_page(); ctxt->pages[sge_no] = page; - atomic_inc(&xprt->sc_dma_used); pa = ib_dma_map_page(xprt->sc_cm_id->device, page, 0, PAGE_SIZE, DMA_FROM_DEVICE); + if (ib_dma_mapping_error(xprt->sc_cm_id->device, pa)) + goto err_put_ctxt; + atomic_inc(&xprt->sc_dma_used); ctxt->sge[sge_no].addr = pa; ctxt->sge[sge_no].length = PAGE_SIZE; - ctxt->sge[sge_no].lkey = xprt->sc_phys_mr->lkey; + ctxt->sge[sge_no].lkey = xprt->sc_dma_lkey; + ctxt->count = sge_no + 1; buflen += PAGE_SIZE; } - ctxt->count = sge_no; recv_wr.next = NULL; recv_wr.sg_list = &ctxt->sge[0]; recv_wr.num_sge = ctxt->count; @@ -493,10 +535,16 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt) svc_xprt_get(&xprt->sc_xprt); ret = ib_post_recv(xprt->sc_qp, &recv_wr, &bad_recv_wr); if (ret) { - svc_xprt_put(&xprt->sc_xprt); + svc_rdma_unmap_dma(ctxt); svc_rdma_put_context(ctxt, 1); + svc_xprt_put(&xprt->sc_xprt); } return ret; + + err_put_ctxt: + svc_rdma_unmap_dma(ctxt); + svc_rdma_put_context(ctxt, 1); + return -ENOMEM; } /* @@ -544,10 +592,6 @@ static void handle_connect_req(struct rdma_cm_id *new_cma_id, size_t client_ird) list_add_tail(&newxprt->sc_accept_q, &listen_xprt->sc_accept_q); spin_unlock_bh(&listen_xprt->sc_lock); - /* - * Can't use svc_xprt_received here because we are not on a - * rqstp thread - */ set_bit(XPT_CONN, &listen_xprt->sc_xprt.xpt_flags); svc_xprt_enqueue(&listen_xprt->sc_xprt); } @@ -567,7 +611,7 @@ static int rdma_listen_handler(struct rdma_cm_id *cma_id, dprintk("svcrdma: Connect request on cma_id=%p, xprt = %p, " "event=%d\n", cma_id, cma_id->context, event->event); handle_connect_req(cma_id, - event->param.conn.responder_resources); + event->param.conn.initiator_depth); break; case RDMA_CM_EVENT_ESTABLISHED: @@ -636,6 +680,7 @@ static int rdma_cma_handler(struct rdma_cm_id *cma_id, * Create a listening RDMA service endpoint. */ static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, + struct net *net, struct sockaddr *sa, int salen, int flags) { @@ -645,13 +690,17 @@ static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, int ret; dprintk("svcrdma: Creating RDMA socket\n"); - + if (sa->sa_family != AF_INET) { + dprintk("svcrdma: Address family %d is not supported.\n", sa->sa_family); + return ERR_PTR(-EAFNOSUPPORT); + } cma_xprt = rdma_create_xprt(serv, 1); if (!cma_xprt) return ERR_PTR(-ENOMEM); xprt = &cma_xprt->sc_xprt; - listen_id = rdma_create_id(rdma_listen_handler, cma_xprt, RDMA_PS_TCP); + listen_id = rdma_create_id(rdma_listen_handler, cma_xprt, RDMA_PS_TCP, + IB_QPT_RC); if (IS_ERR(listen_id)) { ret = PTR_ERR(listen_id); dprintk("svcrdma: rdma_create_id failed = %d\n", ret); @@ -687,6 +736,97 @@ static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, return ERR_PTR(ret); } +static struct svc_rdma_fastreg_mr *rdma_alloc_frmr(struct svcxprt_rdma *xprt) +{ + struct ib_mr *mr; + struct ib_fast_reg_page_list *pl; + struct svc_rdma_fastreg_mr *frmr; + + frmr = kmalloc(sizeof(*frmr), GFP_KERNEL); + if (!frmr) + goto err; + + mr = ib_alloc_fast_reg_mr(xprt->sc_pd, RPCSVC_MAXPAGES); + if (IS_ERR(mr)) + goto err_free_frmr; + + pl = ib_alloc_fast_reg_page_list(xprt->sc_cm_id->device, + RPCSVC_MAXPAGES); + if (IS_ERR(pl)) + goto err_free_mr; + + frmr->mr = mr; + frmr->page_list = pl; + INIT_LIST_HEAD(&frmr->frmr_list); + return frmr; + + err_free_mr: + ib_dereg_mr(mr); + err_free_frmr: + kfree(frmr); + err: + return ERR_PTR(-ENOMEM); +} + +static void rdma_dealloc_frmr_q(struct svcxprt_rdma *xprt) +{ + struct svc_rdma_fastreg_mr *frmr; + + while (!list_empty(&xprt->sc_frmr_q)) { + frmr = list_entry(xprt->sc_frmr_q.next, + struct svc_rdma_fastreg_mr, frmr_list); + list_del_init(&frmr->frmr_list); + ib_dereg_mr(frmr->mr); + ib_free_fast_reg_page_list(frmr->page_list); + kfree(frmr); + } +} + +struct svc_rdma_fastreg_mr *svc_rdma_get_frmr(struct svcxprt_rdma *rdma) +{ + struct svc_rdma_fastreg_mr *frmr = NULL; + + spin_lock_bh(&rdma->sc_frmr_q_lock); + if (!list_empty(&rdma->sc_frmr_q)) { + frmr = list_entry(rdma->sc_frmr_q.next, + struct svc_rdma_fastreg_mr, frmr_list); + list_del_init(&frmr->frmr_list); + frmr->map_len = 0; + frmr->page_list_len = 0; + } + spin_unlock_bh(&rdma->sc_frmr_q_lock); + if (frmr) + return frmr; + + return rdma_alloc_frmr(rdma); +} + +static void frmr_unmap_dma(struct svcxprt_rdma *xprt, + struct svc_rdma_fastreg_mr *frmr) +{ + int page_no; + for (page_no = 0; page_no < frmr->page_list_len; page_no++) { + dma_addr_t addr = frmr->page_list->page_list[page_no]; + if (ib_dma_mapping_error(frmr->mr->device, addr)) + continue; + atomic_dec(&xprt->sc_dma_used); + ib_dma_unmap_page(frmr->mr->device, addr, PAGE_SIZE, + frmr->direction); + } +} + +void svc_rdma_put_frmr(struct svcxprt_rdma *rdma, + struct svc_rdma_fastreg_mr *frmr) +{ + if (frmr) { + frmr_unmap_dma(rdma, frmr); + spin_lock_bh(&rdma->sc_frmr_q_lock); + BUG_ON(!list_empty(&frmr->frmr_list)); + list_add(&frmr->frmr_list, &rdma->sc_frmr_q); + spin_unlock_bh(&rdma->sc_frmr_q_lock); + } +} + /* * This is the xpo_recvfrom function for listening endpoints. Its * purpose is to accept incoming connections. The CMA callback handler @@ -705,6 +845,8 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) struct rdma_conn_param conn_param; struct ib_qp_init_attr qp_attr; struct ib_device_attr devattr; + int uninitialized_var(dma_mr_acc); + int need_dma_mr; int ret; int i; @@ -820,15 +962,81 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) } newxprt->sc_qp = newxprt->sc_cm_id->qp; - /* Register all of physical memory */ - newxprt->sc_phys_mr = ib_get_dma_mr(newxprt->sc_pd, - IB_ACCESS_LOCAL_WRITE | - IB_ACCESS_REMOTE_WRITE); - if (IS_ERR(newxprt->sc_phys_mr)) { - dprintk("svcrdma: Failed to create DMA MR ret=%d\n", ret); + /* + * Use the most secure set of MR resources based on the + * transport type and available memory management features in + * the device. Here's the table implemented below: + * + * Fast Global DMA Remote WR + * Reg LKEY MR Access + * Sup'd Sup'd Needed Needed + * + * IWARP N N Y Y + * N Y Y Y + * Y N Y N + * Y Y N - + * + * IB N N Y N + * N Y N - + * Y N Y N + * Y Y N - + * + * NB: iWARP requires remote write access for the data sink + * of an RDMA_READ. IB does not. + */ + if (devattr.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) { + newxprt->sc_frmr_pg_list_len = + devattr.max_fast_reg_page_list_len; + newxprt->sc_dev_caps |= SVCRDMA_DEVCAP_FAST_REG; + } + + /* + * Determine if a DMA MR is required and if so, what privs are required + */ + switch (rdma_node_get_transport(newxprt->sc_cm_id->device->node_type)) { + case RDMA_TRANSPORT_IWARP: + newxprt->sc_dev_caps |= SVCRDMA_DEVCAP_READ_W_INV; + if (!(newxprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG)) { + need_dma_mr = 1; + dma_mr_acc = + (IB_ACCESS_LOCAL_WRITE | + IB_ACCESS_REMOTE_WRITE); + } else if (!(devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)) { + need_dma_mr = 1; + dma_mr_acc = IB_ACCESS_LOCAL_WRITE; + } else + need_dma_mr = 0; + break; + case RDMA_TRANSPORT_IB: + if (!(newxprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG)) { + need_dma_mr = 1; + dma_mr_acc = IB_ACCESS_LOCAL_WRITE; + } else if (!(devattr.device_cap_flags & + IB_DEVICE_LOCAL_DMA_LKEY)) { + need_dma_mr = 1; + dma_mr_acc = IB_ACCESS_LOCAL_WRITE; + } else + need_dma_mr = 0; + break; + default: goto errout; } + /* Create the DMA MR if needed, otherwise, use the DMA LKEY */ + if (need_dma_mr) { + /* Register all of physical memory */ + newxprt->sc_phys_mr = + ib_get_dma_mr(newxprt->sc_pd, dma_mr_acc); + if (IS_ERR(newxprt->sc_phys_mr)) { + dprintk("svcrdma: Failed to create DMA MR ret=%d\n", + ret); + goto errout; + } + newxprt->sc_dma_lkey = newxprt->sc_phys_mr->lkey; + } else + newxprt->sc_dma_lkey = + newxprt->sc_cm_id->device->local_dma_lkey; + /* Post receive buffers */ for (i = 0; i < newxprt->sc_max_requests; i++) { ret = svc_rdma_post_recv(newxprt); @@ -862,21 +1070,21 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) dprintk("svcrdma: new connection %p accepted with the following " "attributes:\n" - " local_ip : %d.%d.%d.%d\n" + " local_ip : %pI4\n" " local_port : %d\n" - " remote_ip : %d.%d.%d.%d\n" + " remote_ip : %pI4\n" " remote_port : %d\n" " max_sge : %d\n" " sq_depth : %d\n" " max_requests : %d\n" " ord : %d\n", newxprt, - NIPQUAD(((struct sockaddr_in *)&newxprt->sc_cm_id-> - route.addr.src_addr)->sin_addr.s_addr), + &((struct sockaddr_in *)&newxprt->sc_cm_id-> + route.addr.src_addr)->sin_addr.s_addr, ntohs(((struct sockaddr_in *)&newxprt->sc_cm_id-> route.addr.src_addr)->sin_port), - NIPQUAD(((struct sockaddr_in *)&newxprt->sc_cm_id-> - route.addr.dst_addr)->sin_addr.s_addr), + &((struct sockaddr_in *)&newxprt->sc_cm_id-> + route.addr.dst_addr)->sin_addr.s_addr, ntohs(((struct sockaddr_in *)&newxprt->sc_cm_id-> route.addr.dst_addr)->sin_port), newxprt->sc_max_sge, @@ -962,6 +1170,9 @@ static void __svc_rdma_free(struct work_struct *work) WARN_ON(atomic_read(&rdma->sc_ctxt_used) != 0); WARN_ON(atomic_read(&rdma->sc_dma_used) != 0); + /* De-allocate fastreg mr */ + rdma_dealloc_frmr_q(rdma); + /* Destroy the QP if present (not a listener) */ if (rdma->sc_qp && !IS_ERR(rdma->sc_qp)) ib_destroy_qp(rdma->sc_qp); @@ -989,7 +1200,7 @@ static void svc_rdma_free(struct svc_xprt *xprt) struct svcxprt_rdma *rdma = container_of(xprt, struct svcxprt_rdma, sc_xprt); INIT_WORK(&rdma->sc_work, __svc_rdma_free); - schedule_work(&rdma->sc_work); + queue_work(svc_rdma_wq, &rdma->sc_work); } static int svc_rdma_has_wspace(struct svc_xprt *xprt) @@ -998,14 +1209,7 @@ static int svc_rdma_has_wspace(struct svc_xprt *xprt) container_of(xprt, struct svcxprt_rdma, sc_xprt); /* - * If there are fewer SQ WR available than required to send a - * simple response, return false. - */ - if ((rdma->sc_sq_depth - atomic_read(&rdma->sc_sq_count) < 3)) - return 0; - - /* - * ...or there are already waiters on the SQ, + * If there are already waiters on the SQ, * return false. */ if (waitqueue_active(&rdma->sc_send_wait)) @@ -1015,21 +1219,64 @@ static int svc_rdma_has_wspace(struct svc_xprt *xprt) return 1; } +static int svc_rdma_secure_port(struct svc_rqst *rqstp) +{ + return 1; +} + +/* + * Attempt to register the kvec representing the RPC memory with the + * device. + * + * Returns: + * NULL : The device does not support fastreg or there were no more + * fastreg mr. + * frmr : The kvec register request was successfully posted. + * <0 : An error was encountered attempting to register the kvec. + */ +int svc_rdma_fastreg(struct svcxprt_rdma *xprt, + struct svc_rdma_fastreg_mr *frmr) +{ + struct ib_send_wr fastreg_wr; + u8 key; + + /* Bump the key */ + key = (u8)(frmr->mr->lkey & 0x000000FF); + ib_update_fast_reg_key(frmr->mr, ++key); + + /* Prepare FASTREG WR */ + memset(&fastreg_wr, 0, sizeof fastreg_wr); + fastreg_wr.opcode = IB_WR_FAST_REG_MR; + fastreg_wr.send_flags = IB_SEND_SIGNALED; + fastreg_wr.wr.fast_reg.iova_start = (unsigned long)frmr->kva; + fastreg_wr.wr.fast_reg.page_list = frmr->page_list; + fastreg_wr.wr.fast_reg.page_list_len = frmr->page_list_len; + fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT; + fastreg_wr.wr.fast_reg.length = frmr->map_len; + fastreg_wr.wr.fast_reg.access_flags = frmr->access_flags; + fastreg_wr.wr.fast_reg.rkey = frmr->mr->lkey; + return svc_rdma_send(xprt, &fastreg_wr); +} + int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr) { - struct ib_send_wr *bad_wr; + struct ib_send_wr *bad_wr, *n_wr; + int wr_count; + int i; int ret; if (test_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags)) return -ENOTCONN; BUG_ON(wr->send_flags != IB_SEND_SIGNALED); - BUG_ON(((struct svc_rdma_op_ctxt *)(unsigned long)wr->wr_id)->wr_op != - wr->opcode); + wr_count = 1; + for (n_wr = wr->next; n_wr; n_wr = n_wr->next) + wr_count++; + /* If the SQ is full, wait until an SQ entry is available */ while (1) { spin_lock_bh(&xprt->sc_lock); - if (xprt->sc_sq_depth == atomic_read(&xprt->sc_sq_count)) { + if (xprt->sc_sq_depth < atomic_read(&xprt->sc_sq_count) + wr_count) { spin_unlock_bh(&xprt->sc_lock); atomic_inc(&rdma_stat_sq_starve); @@ -1041,22 +1288,29 @@ int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr) atomic_read(&xprt->sc_sq_count) < xprt->sc_sq_depth); if (test_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags)) - return 0; + return -ENOTCONN; continue; } - /* Bumped used SQ WR count and post */ - svc_xprt_get(&xprt->sc_xprt); + /* Take a transport ref for each WR posted */ + for (i = 0; i < wr_count; i++) + svc_xprt_get(&xprt->sc_xprt); + + /* Bump used SQ WR count and post */ + atomic_add(wr_count, &xprt->sc_sq_count); ret = ib_post_send(xprt->sc_qp, wr, &bad_wr); - if (!ret) - atomic_inc(&xprt->sc_sq_count); - else { - svc_xprt_put(&xprt->sc_xprt); + if (ret) { + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + atomic_sub(wr_count, &xprt->sc_sq_count); + for (i = 0; i < wr_count; i ++) + svc_xprt_put(&xprt->sc_xprt); dprintk("svcrdma: failed to post SQ WR rc=%d, " "sc_sq_count=%d, sc_sq_depth=%d\n", ret, atomic_read(&xprt->sc_sq_count), xprt->sc_sq_depth); } spin_unlock_bh(&xprt->sc_lock); + if (ret) + wake_up(&xprt->sc_send_wait); break; } return ret; @@ -1066,7 +1320,6 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp, enum rpcrdma_errcode err) { struct ib_send_wr err_wr; - struct ib_sge sge; struct page *p; struct svc_rdma_op_ctxt *ctxt; u32 *va; @@ -1079,22 +1332,28 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp, /* XDR encode error */ length = svc_rdma_xdr_encode_error(xprt, rmsgp, err, va); - /* Prepare SGE for local address */ - atomic_inc(&xprt->sc_dma_used); - sge.addr = ib_dma_map_page(xprt->sc_cm_id->device, - p, 0, PAGE_SIZE, DMA_FROM_DEVICE); - sge.lkey = xprt->sc_phys_mr->lkey; - sge.length = length; - ctxt = svc_rdma_get_context(xprt); + ctxt->direction = DMA_FROM_DEVICE; ctxt->count = 1; ctxt->pages[0] = p; + /* Prepare SGE for local address */ + ctxt->sge[0].addr = ib_dma_map_page(xprt->sc_cm_id->device, + p, 0, length, DMA_FROM_DEVICE); + if (ib_dma_mapping_error(xprt->sc_cm_id->device, ctxt->sge[0].addr)) { + put_page(p); + svc_rdma_put_context(ctxt, 1); + return; + } + atomic_inc(&xprt->sc_dma_used); + ctxt->sge[0].lkey = xprt->sc_dma_lkey; + ctxt->sge[0].length = length; + /* Prepare SEND WR */ memset(&err_wr, 0, sizeof err_wr); ctxt->wr_op = IB_WR_SEND; err_wr.wr_id = (unsigned long)ctxt; - err_wr.sg_list = &sge; + err_wr.sg_list = ctxt->sge; err_wr.num_sge = 1; err_wr.opcode = IB_WR_SEND; err_wr.send_flags = IB_SEND_SIGNALED; @@ -1104,6 +1363,7 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp, if (ret) { dprintk("svcrdma: Error %d posting send for protocol error\n", ret); + svc_rdma_unmap_dma(ctxt); svc_rdma_put_context(ctxt, 1); } } diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index a564c1a39ec..66f91f0d071 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -49,7 +49,9 @@ #include <linux/module.h> #include <linux/init.h> +#include <linux/slab.h> #include <linux/seq_file.h> +#include <linux/sunrpc/addr.h> #include "xprt_rdma.h" @@ -70,11 +72,8 @@ static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE; static unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE; static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE; static unsigned int xprt_rdma_inline_write_padding; -#if !RPCRDMA_PERSISTENT_REGISTRATION -static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_REGISTER; /* FMR? */ -#else -static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_ALLPHYSICAL; -#endif +static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR; + int xprt_rdma_pad_optimize = 0; #ifdef RPC_DEBUG @@ -87,123 +86,97 @@ static unsigned int max_memreg = RPCRDMA_LAST - 1; static struct ctl_table_header *sunrpc_table_header; -static ctl_table xr_tunables_table[] = { +static struct ctl_table xr_tunables_table[] = { { - .ctl_name = CTL_UNNUMBERED, .procname = "rdma_slot_table_entries", .data = &xprt_rdma_slot_table_entries, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, - .strategy = &sysctl_intvec, + .proc_handler = proc_dointvec_minmax, .extra1 = &min_slot_table_size, .extra2 = &max_slot_table_size }, { - .ctl_name = CTL_UNNUMBERED, .procname = "rdma_max_inline_read", .data = &xprt_rdma_max_inline_read, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec, - .strategy = &sysctl_intvec, + .proc_handler = proc_dointvec, }, { - .ctl_name = CTL_UNNUMBERED, .procname = "rdma_max_inline_write", .data = &xprt_rdma_max_inline_write, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec, - .strategy = &sysctl_intvec, + .proc_handler = proc_dointvec, }, { - .ctl_name = CTL_UNNUMBERED, .procname = "rdma_inline_write_padding", .data = &xprt_rdma_inline_write_padding, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, - .strategy = &sysctl_intvec, + .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &max_padding, }, { - .ctl_name = CTL_UNNUMBERED, .procname = "rdma_memreg_strategy", .data = &xprt_rdma_memreg_strategy, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, - .strategy = &sysctl_intvec, + .proc_handler = proc_dointvec_minmax, .extra1 = &min_memreg, .extra2 = &max_memreg, }, { - .ctl_name = 0, + .procname = "rdma_pad_optimize", + .data = &xprt_rdma_pad_optimize, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_dointvec, }, + { }, }; -static ctl_table sunrpc_table[] = { +static struct ctl_table sunrpc_table[] = { { - .ctl_name = CTL_SUNRPC, .procname = "sunrpc", .mode = 0555, .child = xr_tunables_table }, - { - .ctl_name = 0, - }, + { }, }; #endif +#define RPCRDMA_BIND_TO (60U * HZ) +#define RPCRDMA_INIT_REEST_TO (5U * HZ) +#define RPCRDMA_MAX_REEST_TO (30U * HZ) +#define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ) + static struct rpc_xprt_ops xprt_rdma_procs; /* forward reference */ static void xprt_rdma_format_addresses(struct rpc_xprt *xprt) { - struct sockaddr_in *addr = (struct sockaddr_in *) + struct sockaddr *sap = (struct sockaddr *) &rpcx_to_rdmad(xprt).addr; - char *buf; + struct sockaddr_in *sin = (struct sockaddr_in *)sap; + char buf[64]; - buf = kzalloc(20, GFP_KERNEL); - if (buf) - snprintf(buf, 20, NIPQUAD_FMT, NIPQUAD(addr->sin_addr.s_addr)); - xprt->address_strings[RPC_DISPLAY_ADDR] = buf; + (void)rpc_ntop(sap, buf, sizeof(buf)); + xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL); - buf = kzalloc(8, GFP_KERNEL); - if (buf) - snprintf(buf, 8, "%u", ntohs(addr->sin_port)); - xprt->address_strings[RPC_DISPLAY_PORT] = buf; + snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap)); + xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL); xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma"; - buf = kzalloc(48, GFP_KERNEL); - if (buf) - snprintf(buf, 48, "addr="NIPQUAD_FMT" port=%u proto=%s", - NIPQUAD(addr->sin_addr.s_addr), - ntohs(addr->sin_port), "rdma"); - xprt->address_strings[RPC_DISPLAY_ALL] = buf; - - buf = kzalloc(10, GFP_KERNEL); - if (buf) - snprintf(buf, 10, "%02x%02x%02x%02x", - NIPQUAD(addr->sin_addr.s_addr)); - xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = buf; - - buf = kzalloc(8, GFP_KERNEL); - if (buf) - snprintf(buf, 8, "%4hx", ntohs(addr->sin_port)); - xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf; - - buf = kzalloc(30, GFP_KERNEL); - if (buf) - snprintf(buf, 30, NIPQUAD_FMT".%u.%u", - NIPQUAD(addr->sin_addr.s_addr), - ntohs(addr->sin_port) >> 8, - ntohs(addr->sin_port) & 0xff); - xprt->address_strings[RPC_DISPLAY_UNIVERSAL_ADDR] = buf; + snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr)); + xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL); + + snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap)); + xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL); /* netid */ xprt->address_strings[RPC_DISPLAY_NETID] = "rdma"; @@ -232,23 +205,18 @@ xprt_rdma_connect_worker(struct work_struct *work) struct rpc_xprt *xprt = &r_xprt->xprt; int rc = 0; - if (!xprt->shutdown) { - xprt_clear_connected(xprt); - - dprintk("RPC: %s: %sconnect\n", __func__, - r_xprt->rx_ep.rep_connected != 0 ? "re" : ""); - rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia); - if (rc) - goto out; - } - goto out_clear; + current->flags |= PF_FSTRANS; + xprt_clear_connected(xprt); -out: - xprt_wake_pending_tasks(xprt, rc); + dprintk("RPC: %s: %sconnect\n", __func__, + r_xprt->rx_ep.rep_connected != 0 ? "re" : ""); + rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia); + if (rc) + xprt_wake_pending_tasks(xprt, rc); -out_clear: dprintk("RPC: %s: exit\n", __func__); xprt_clear_connecting(xprt); + current->flags &= ~PF_FSTRANS; } /* @@ -266,27 +234,20 @@ static void xprt_rdma_destroy(struct rpc_xprt *xprt) { struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); - int rc; dprintk("RPC: %s: called\n", __func__); - cancel_delayed_work(&r_xprt->rdma_connect); - flush_scheduled_work(); + cancel_delayed_work_sync(&r_xprt->rdma_connect); xprt_clear_connected(xprt); rpcrdma_buffer_destroy(&r_xprt->rx_buf); - rc = rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia); - if (rc) - dprintk("RPC: %s: rpcrdma_ep_destroy returned %i\n", - __func__, rc); + rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia); rpcrdma_ia_close(&r_xprt->rx_ia); xprt_rdma_free_addresses(xprt); - kfree(xprt->slot); - xprt->slot = NULL; - kfree(xprt); + xprt_free(xprt); dprintk("RPC: %s: returning\n", __func__); @@ -318,29 +279,20 @@ xprt_setup_rdma(struct xprt_create *args) return ERR_PTR(-EBADF); } - xprt = kzalloc(sizeof(struct rpcrdma_xprt), GFP_KERNEL); + xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), + xprt_rdma_slot_table_entries, + xprt_rdma_slot_table_entries); if (xprt == NULL) { dprintk("RPC: %s: couldn't allocate rpcrdma_xprt\n", __func__); return ERR_PTR(-ENOMEM); } - xprt->max_reqs = xprt_rdma_slot_table_entries; - xprt->slot = kcalloc(xprt->max_reqs, - sizeof(struct rpc_rqst), GFP_KERNEL); - if (xprt->slot == NULL) { - dprintk("RPC: %s: couldn't allocate %d slots\n", - __func__, xprt->max_reqs); - kfree(xprt); - return ERR_PTR(-ENOMEM); - } - /* 60 second timeout, no retries */ xprt->timeout = &xprt_rdma_default_timeout; - xprt->bind_timeout = (60U * HZ); - xprt->connect_timeout = (60U * HZ); - xprt->reestablish_timeout = (5U * HZ); - xprt->idle_timeout = (5U * 60 * HZ); + xprt->bind_timeout = RPCRDMA_BIND_TO; + xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO; + xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO; xprt->resvport = 0; /* privileged port not needed */ xprt->tsh_size = 0; /* RPC-RDMA handles framing */ @@ -364,8 +316,8 @@ xprt_setup_rdma(struct xprt_create *args) if (ntohs(sin->sin_port) != 0) xprt_set_bound(xprt); - dprintk("RPC: %s: %u.%u.%u.%u:%u\n", __func__, - NIPQUAD(sin->sin_addr.s_addr), ntohs(sin->sin_port)); + dprintk("RPC: %s: %pI4:%u\n", + __func__, &sin->sin_addr.s_addr, ntohs(sin->sin_port)); /* Set max requests */ cdata.max_requests = xprt->max_reqs; @@ -440,12 +392,11 @@ out4: xprt_rdma_free_addresses(xprt); rc = -EINVAL; out3: - (void) rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia); + rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia); out2: rpcrdma_ia_close(&new_xprt->rx_ia); out1: - kfree(xprt->slot); - kfree(xprt); + xprt_free(xprt); return ERR_PTR(rc); } @@ -458,6 +409,8 @@ xprt_rdma_close(struct rpc_xprt *xprt) struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); dprintk("RPC: %s: closing\n", __func__); + if (r_xprt->rx_ep.rep_connected > 0) + xprt->reestablish_timeout = 0; xprt_disconnect_done(xprt); (void) rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia); } @@ -475,40 +428,24 @@ xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port) } static void -xprt_rdma_connect(struct rpc_task *task) +xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task) { - struct rpc_xprt *xprt = (struct rpc_xprt *)task->tk_xprt; struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); - if (!xprt_test_and_set_connecting(xprt)) { - if (r_xprt->rx_ep.rep_connected != 0) { - /* Reconnect */ - schedule_delayed_work(&r_xprt->rdma_connect, - xprt->reestablish_timeout); - } else { - schedule_delayed_work(&r_xprt->rdma_connect, 0); - if (!RPC_IS_ASYNC(task)) - flush_scheduled_work(); - } - } -} - -static int -xprt_rdma_reserve_xprt(struct rpc_task *task) -{ - struct rpc_xprt *xprt = task->tk_xprt; - struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); - int credits = atomic_read(&r_xprt->rx_buf.rb_credits); - - /* == RPC_CWNDSCALE @ init, but *after* setup */ - if (r_xprt->rx_buf.rb_cwndscale == 0UL) { - r_xprt->rx_buf.rb_cwndscale = xprt->cwnd; - dprintk("RPC: %s: cwndscale %lu\n", __func__, - r_xprt->rx_buf.rb_cwndscale); - BUG_ON(r_xprt->rx_buf.rb_cwndscale <= 0); + if (r_xprt->rx_ep.rep_connected != 0) { + /* Reconnect */ + schedule_delayed_work(&r_xprt->rdma_connect, + xprt->reestablish_timeout); + xprt->reestablish_timeout <<= 1; + if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO) + xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO; + else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO) + xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO; + } else { + schedule_delayed_work(&r_xprt->rdma_connect, 0); + if (!RPC_IS_ASYNC(task)) + flush_delayed_work(&r_xprt->rdma_connect); } - xprt->cwnd = credits * r_xprt->rx_buf.rb_cwndscale; - return xprt_reserve_xprt_cong(task); } /* @@ -522,11 +459,12 @@ xprt_rdma_reserve_xprt(struct rpc_task *task) static void * xprt_rdma_allocate(struct rpc_task *task, size_t size) { - struct rpc_xprt *xprt = task->tk_xprt; + struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; struct rpcrdma_req *req, *nreq; req = rpcrdma_buffer_get(&rpcx_to_rdmax(xprt)->rx_buf); - BUG_ON(NULL == req); + if (req == NULL) + return NULL; if (size > req->rl_size) { dprintk("RPC: %s: size %zd too large for buffer[%zd]: " @@ -550,18 +488,6 @@ xprt_rdma_allocate(struct rpc_task *task, size_t size) * If the allocation or registration fails, the RPC framework * will (doggedly) retry. */ - if (rpcx_to_rdmax(xprt)->rx_ia.ri_memreg_strategy == - RPCRDMA_BOUNCEBUFFERS) { - /* forced to "pure inline" */ - dprintk("RPC: %s: too much data (%zd) for inline " - "(r/w max %d/%d)\n", __func__, size, - rpcx_to_rdmad(xprt).inline_rsize, - rpcx_to_rdmad(xprt).inline_wsize); - size = req->rl_size; - rpc_exit(task, -EIO); /* fail the operation */ - rpcx_to_rdmax(xprt)->rx_stats.failed_marshal_count++; - goto out; - } if (task->tk_flags & RPC_TASK_SWAPPER) nreq = kmalloc(sizeof *req + size, GFP_ATOMIC); else @@ -590,7 +516,7 @@ xprt_rdma_allocate(struct rpc_task *task, size_t size) req = nreq; } dprintk("RPC: %s: size %zd, request 0x%p\n", __func__, size, req); -out: + req->rl_connect_cookie = 0; /* our reserved value */ return req->rl_xdr_buf; outfail: @@ -625,9 +551,7 @@ xprt_rdma_free(void *buffer) __func__, rep, (rep && rep->rr_func) ? " (with waiter)" : ""); /* - * Finish the deregistration. When using mw bind, this was - * begun in rpcrdma_reply_handler(). In all other modes, we - * do it here, in thread context. The process is considered + * Finish the deregistration. The process is considered * complete when the rr_func vector becomes NULL - this * was put in place during rpcrdma_reply_handler() - the wait * call below will not block if the dereg is "done". If @@ -636,12 +560,7 @@ xprt_rdma_free(void *buffer) for (i = 0; req->rl_nchunks;) { --req->rl_nchunks; i += rpcrdma_deregister_external( - &req->rl_segments[i], r_xprt, NULL); - } - - if (rep && wait_event_interruptible(rep->rr_unbind, !rep->rr_func)) { - rep->rr_func = NULL; /* abandon the callback */ - req->rl_reply = NULL; + &req->rl_segments[i], r_xprt); } if (req->rl_iov.length == 0) { /* see allocate above */ @@ -673,16 +592,15 @@ static int xprt_rdma_send_request(struct rpc_task *task) { struct rpc_rqst *rqst = task->tk_rqstp; - struct rpc_xprt *xprt = task->tk_xprt; + struct rpc_xprt *xprt = rqst->rq_xprt; struct rpcrdma_req *req = rpcr_to_rdmar(rqst); struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); + int rc; - /* marshal the send itself */ - if (req->rl_niovs == 0 && rpcrdma_marshal_req(rqst) != 0) { - r_xprt->rx_stats.failed_marshal_count++; - dprintk("RPC: %s: rpcrdma_marshal_req failed\n", - __func__); - return -EIO; + if (req->rl_niovs == 0) { + rc = rpcrdma_marshal_req(rqst); + if (rc < 0) + goto failed_marshal; } if (req->rl_reply == NULL) /* e.g. reconnection */ @@ -694,13 +612,27 @@ xprt_rdma_send_request(struct rpc_task *task) req->rl_reply->rr_xprt = xprt; } - if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req)) { - xprt_disconnect_done(xprt); - return -ENOTCONN; /* implies disconnect */ - } + /* Must suppress retransmit to maintain credits */ + if (req->rl_connect_cookie == xprt->connect_cookie) + goto drop_connection; + req->rl_connect_cookie = xprt->connect_cookie; + if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req)) + goto drop_connection; + + rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len; rqst->rq_bytes_sent = 0; return 0; + +failed_marshal: + r_xprt->rx_stats.failed_marshal_count++; + dprintk("RPC: %s: rpcrdma_marshal_req failed, status %i\n", + __func__, rc); + if (rc == -EIO) + return -EIO; +drop_connection: + xprt_disconnect_done(xprt); + return -ENOTCONN; /* implies disconnect */ } static void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) @@ -743,8 +675,9 @@ static void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) */ static struct rpc_xprt_ops xprt_rdma_procs = { - .reserve_xprt = xprt_rdma_reserve_xprt, + .reserve_xprt = xprt_reserve_xprt_cong, .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */ + .alloc_slot = xprt_alloc_slot, .release_request = xprt_release_rqst_cong, /* ditto */ .set_retrans_timeout = xprt_set_retrans_timeout_def, /* ditto */ .rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */ @@ -792,14 +725,14 @@ static int __init xprt_rdma_init(void) if (rc) return rc; - dprintk(KERN_INFO "RPCRDMA Module Init, register RPC RDMA transport\n"); + dprintk("RPCRDMA Module Init, register RPC RDMA transport\n"); - dprintk(KERN_INFO "Defaults:\n"); - dprintk(KERN_INFO "\tSlots %d\n" + dprintk("Defaults:\n"); + dprintk("\tSlots %d\n" "\tMaxInlineRead %d\n\tMaxInlineWrite %d\n", xprt_rdma_slot_table_entries, xprt_rdma_max_inline_read, xprt_rdma_max_inline_write); - dprintk(KERN_INFO "\tPadding %d\n\tMemreg %d\n", + dprintk("\tPadding %d\n\tMemreg %d\n", xprt_rdma_inline_write_padding, xprt_rdma_memreg_strategy); #ifdef RPC_DEBUG diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 8ea283ecc52..13dbd1c389f 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -47,7 +47,9 @@ * o buffer memory */ -#include <linux/pci.h> /* for Tavor hack below */ +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <asm/bitops.h> #include "xprt_rdma.h" @@ -140,89 +142,139 @@ rpcrdma_cq_async_error_upcall(struct ib_event *event, void *context) } } -static inline -void rpcrdma_event_process(struct ib_wc *wc) +static void +rpcrdma_sendcq_process_wc(struct ib_wc *wc) { - struct rpcrdma_rep *rep = - (struct rpcrdma_rep *)(unsigned long) wc->wr_id; + struct rpcrdma_mw *frmr = (struct rpcrdma_mw *)(unsigned long)wc->wr_id; - dprintk("RPC: %s: event rep %p status %X opcode %X length %u\n", - __func__, rep, wc->status, wc->opcode, wc->byte_len); + dprintk("RPC: %s: frmr %p status %X opcode %d\n", + __func__, frmr, wc->status, wc->opcode); - if (!rep) /* send or bind completion that we don't care about */ + if (wc->wr_id == 0ULL) + return; + if (wc->status != IB_WC_SUCCESS) return; - if (IB_WC_SUCCESS != wc->status) { - dprintk("RPC: %s: %s WC status %X, connection lost\n", - __func__, (wc->opcode & IB_WC_RECV) ? "recv" : "send", - wc->status); - rep->rr_len = ~0U; - rpcrdma_schedule_tasklet(rep); + if (wc->opcode == IB_WC_FAST_REG_MR) + frmr->r.frmr.state = FRMR_IS_VALID; + else if (wc->opcode == IB_WC_LOCAL_INV) + frmr->r.frmr.state = FRMR_IS_INVALID; +} + +static int +rpcrdma_sendcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep) +{ + struct ib_wc *wcs; + int budget, count, rc; + + budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE; + do { + wcs = ep->rep_send_wcs; + + rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs); + if (rc <= 0) + return rc; + + count = rc; + while (count-- > 0) + rpcrdma_sendcq_process_wc(wcs++); + } while (rc == RPCRDMA_POLLSIZE && --budget); + return 0; +} + +/* + * Handle send, fast_reg_mr, and local_inv completions. + * + * Send events are typically suppressed and thus do not result + * in an upcall. Occasionally one is signaled, however. This + * prevents the provider's completion queue from wrapping and + * losing a completion. + */ +static void +rpcrdma_sendcq_upcall(struct ib_cq *cq, void *cq_context) +{ + struct rpcrdma_ep *ep = (struct rpcrdma_ep *)cq_context; + int rc; + + rc = rpcrdma_sendcq_poll(cq, ep); + if (rc) { + dprintk("RPC: %s: ib_poll_cq failed: %i\n", + __func__, rc); return; } - switch (wc->opcode) { - case IB_WC_RECV: - rep->rr_len = wc->byte_len; - ib_dma_sync_single_for_cpu( - rdmab_to_ia(rep->rr_buffer)->ri_id->device, - rep->rr_iov.addr, rep->rr_len, DMA_FROM_DEVICE); - /* Keep (only) the most recent credits, after check validity */ - if (rep->rr_len >= 16) { - struct rpcrdma_msg *p = - (struct rpcrdma_msg *) rep->rr_base; - unsigned int credits = ntohl(p->rm_credit); - if (credits == 0) { - dprintk("RPC: %s: server" - " dropped credits to 0!\n", __func__); - /* don't deadlock */ - credits = 1; - } else if (credits > rep->rr_buffer->rb_max_requests) { - dprintk("RPC: %s: server" - " over-crediting: %d (%d)\n", - __func__, credits, - rep->rr_buffer->rb_max_requests); - credits = rep->rr_buffer->rb_max_requests; - } - atomic_set(&rep->rr_buffer->rb_credits, credits); - } - /* fall through */ - case IB_WC_BIND_MW: - rpcrdma_schedule_tasklet(rep); - break; - default: - dprintk("RPC: %s: unexpected WC event %X\n", - __func__, wc->opcode); - break; + rc = ib_req_notify_cq(cq, + IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); + if (rc == 0) + return; + if (rc < 0) { + dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", + __func__, rc); + return; } + + rpcrdma_sendcq_poll(cq, ep); } -static inline int -rpcrdma_cq_poll(struct ib_cq *cq) +static void +rpcrdma_recvcq_process_wc(struct ib_wc *wc) { - struct ib_wc wc; - int rc; + struct rpcrdma_rep *rep = + (struct rpcrdma_rep *)(unsigned long)wc->wr_id; - for (;;) { - rc = ib_poll_cq(cq, 1, &wc); - if (rc < 0) { - dprintk("RPC: %s: ib_poll_cq failed %i\n", - __func__, rc); - return rc; - } - if (rc == 0) - break; + dprintk("RPC: %s: rep %p status %X opcode %X length %u\n", + __func__, rep, wc->status, wc->opcode, wc->byte_len); - rpcrdma_event_process(&wc); + if (wc->status != IB_WC_SUCCESS) { + rep->rr_len = ~0U; + goto out_schedule; } + if (wc->opcode != IB_WC_RECV) + return; + + rep->rr_len = wc->byte_len; + ib_dma_sync_single_for_cpu(rdmab_to_ia(rep->rr_buffer)->ri_id->device, + rep->rr_iov.addr, rep->rr_len, DMA_FROM_DEVICE); + + if (rep->rr_len >= 16) { + struct rpcrdma_msg *p = (struct rpcrdma_msg *)rep->rr_base; + unsigned int credits = ntohl(p->rm_credit); + + if (credits == 0) + credits = 1; /* don't deadlock */ + else if (credits > rep->rr_buffer->rb_max_requests) + credits = rep->rr_buffer->rb_max_requests; + atomic_set(&rep->rr_buffer->rb_credits, credits); + } + +out_schedule: + rpcrdma_schedule_tasklet(rep); +} +static int +rpcrdma_recvcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep) +{ + struct ib_wc *wcs; + int budget, count, rc; + + budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE; + do { + wcs = ep->rep_recv_wcs; + + rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs); + if (rc <= 0) + return rc; + + count = rc; + while (count-- > 0) + rpcrdma_recvcq_process_wc(wcs++); + } while (rc == RPCRDMA_POLLSIZE && --budget); return 0; } /* - * rpcrdma_cq_event_upcall + * Handle receive completions. * - * This upcall handles recv, send, bind and unbind events. * It is reentrant but processes single events in order to maintain * ordering of receives to keep server credits. * @@ -231,26 +283,31 @@ rpcrdma_cq_poll(struct ib_cq *cq) * connection shutdown. That is, the structures required for * the completion of the reply handler must remain intact until * all memory has been reclaimed. - * - * Note that send events are suppressed and do not result in an upcall. */ static void -rpcrdma_cq_event_upcall(struct ib_cq *cq, void *context) +rpcrdma_recvcq_upcall(struct ib_cq *cq, void *cq_context) { + struct rpcrdma_ep *ep = (struct rpcrdma_ep *)cq_context; int rc; - rc = rpcrdma_cq_poll(cq); - if (rc) + rc = rpcrdma_recvcq_poll(cq, ep); + if (rc) { + dprintk("RPC: %s: ib_poll_cq failed: %i\n", + __func__, rc); return; + } - rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); - if (rc) { - dprintk("RPC: %s: ib_req_notify_cq failed %i\n", + rc = ib_req_notify_cq(cq, + IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); + if (rc == 0) + return; + if (rc < 0) { + dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", __func__, rc); return; } - rpcrdma_cq_poll(cq); + rpcrdma_recvcq_poll(cq, ep); } #ifdef RPC_DEBUG @@ -276,7 +333,9 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) struct rpcrdma_xprt *xprt = id->context; struct rpcrdma_ia *ia = &xprt->rx_ia; struct rpcrdma_ep *ep = &xprt->rx_ep; +#ifdef RPC_DEBUG struct sockaddr_in *addr = (struct sockaddr_in *) &ep->rep_remote_addr; +#endif struct ib_qp_attr attr; struct ib_qp_init_attr iattr; int connstate = 0; @@ -284,6 +343,7 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) switch (event->event) { case RDMA_CM_EVENT_ADDR_RESOLVED: case RDMA_CM_EVENT_ROUTE_RESOLVED: + ia->ri_async_rc = 0; complete(&ia->ri_done); break; case RDMA_CM_EVENT_ADDR_ERROR: @@ -322,12 +382,11 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) case RDMA_CM_EVENT_DEVICE_REMOVAL: connstate = -ENODEV; connected: - dprintk("RPC: %s: %s: %u.%u.%u.%u:%u" - " (ep 0x%p event 0x%x)\n", + dprintk("RPC: %s: %s: %pI4:%u (ep 0x%p event 0x%x)\n", __func__, (event->event <= 11) ? conn[event->event] : "unknown connection error", - NIPQUAD(addr->sin_addr.s_addr), + &addr->sin_addr.s_addr, ntohs(addr->sin_port), ep, event->event); atomic_set(&rpcx_to_rdmax(ep->rep_xprt)->rx_buf.rb_credits, 1); @@ -338,13 +397,31 @@ connected: wake_up_all(&ep->rep_connect_wait); break; default: - ia->ri_async_rc = -EINVAL; - dprintk("RPC: %s: unexpected CM event %X\n", + dprintk("RPC: %s: unexpected CM event %d\n", __func__, event->event); - complete(&ia->ri_done); break; } +#ifdef RPC_DEBUG + if (connstate == 1) { + int ird = attr.max_dest_rd_atomic; + int tird = ep->rep_remote_cma.responder_resources; + printk(KERN_INFO "rpcrdma: connection to %pI4:%u " + "on %s, memreg %d slots %d ird %d%s\n", + &addr->sin_addr.s_addr, + ntohs(addr->sin_port), + ia->ri_id->device->name, + ia->ri_memreg_strategy, + xprt->rx_buf.rb_max_requests, + ird, ird < 4 && ird < tird / 2 ? " (low!)" : ""); + } else if (connstate < 0) { + printk(KERN_INFO "rpcrdma: connection to %pI4:%u closed (%d)\n", + &addr->sin_addr.s_addr, + ntohs(addr->sin_port), + connstate); + } +#endif + return 0; } @@ -355,7 +432,9 @@ rpcrdma_create_id(struct rpcrdma_xprt *xprt, struct rdma_cm_id *id; int rc; - id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP); + init_completion(&ia->ri_done); + + id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP, IB_QPT_RC); if (IS_ERR(id)) { rc = PTR_ERR(id); dprintk("RPC: %s: rdma_create_id() failed %i\n", @@ -363,26 +442,28 @@ rpcrdma_create_id(struct rpcrdma_xprt *xprt, return id; } - ia->ri_async_rc = 0; + ia->ri_async_rc = -ETIMEDOUT; rc = rdma_resolve_addr(id, NULL, addr, RDMA_RESOLVE_TIMEOUT); if (rc) { dprintk("RPC: %s: rdma_resolve_addr() failed %i\n", __func__, rc); goto out; } - wait_for_completion(&ia->ri_done); + wait_for_completion_interruptible_timeout(&ia->ri_done, + msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1); rc = ia->ri_async_rc; if (rc) goto out; - ia->ri_async_rc = 0; + ia->ri_async_rc = -ETIMEDOUT; rc = rdma_resolve_route(id, RDMA_RESOLVE_TIMEOUT); if (rc) { dprintk("RPC: %s: rdma_resolve_route() failed %i\n", __func__, rc); goto out; } - wait_for_completion(&ia->ri_done); + wait_for_completion_interruptible_timeout(&ia->ri_done, + msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1); rc = ia->ri_async_rc; if (rc) goto out; @@ -423,11 +504,10 @@ rpcrdma_clean_cq(struct ib_cq *cq) int rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) { - int rc; + int rc, mem_priv; + struct ib_device_attr devattr; struct rpcrdma_ia *ia = &xprt->rx_ia; - init_completion(&ia->ri_done); - ia->ri_id = rpcrdma_create_id(xprt, ia, addr); if (IS_ERR(ia->ri_id)) { rc = PTR_ERR(ia->ri_id); @@ -443,6 +523,51 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) } /* + * Query the device to determine if the requested memory + * registration strategy is supported. If it isn't, set the + * strategy to a globally supported model. + */ + rc = ib_query_device(ia->ri_id->device, &devattr); + if (rc) { + dprintk("RPC: %s: ib_query_device failed %d\n", + __func__, rc); + goto out2; + } + + if (devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) { + ia->ri_have_dma_lkey = 1; + ia->ri_dma_lkey = ia->ri_id->device->local_dma_lkey; + } + + if (memreg == RPCRDMA_FRMR) { + /* Requires both frmr reg and local dma lkey */ + if ((devattr.device_cap_flags & + (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) != + (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) { + dprintk("RPC: %s: FRMR registration " + "not supported by HCA\n", __func__); + memreg = RPCRDMA_MTHCAFMR; + } else { + /* Mind the ia limit on FRMR page list depth */ + ia->ri_max_frmr_depth = min_t(unsigned int, + RPCRDMA_MAX_DATA_SEGS, + devattr.max_fast_reg_page_list_len); + } + } + if (memreg == RPCRDMA_MTHCAFMR) { + if (!ia->ri_id->device->alloc_fmr) { + dprintk("RPC: %s: MTHCAFMR registration " + "not supported by HCA\n", __func__); +#if RPCRDMA_PERSISTENT_REGISTRATION + memreg = RPCRDMA_ALLPHYSICAL; +#else + rc = -ENOMEM; + goto out2; +#endif + } + } + + /* * Optionally obtain an underlying physical identity mapping in * order to do a memory window-based bind. This base registration * is protected from remote access - that is enabled only by binding @@ -450,32 +575,40 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) * revoked after the corresponding completion similar to a storage * adapter. */ - if (memreg > RPCRDMA_REGISTER) { - int mem_priv = IB_ACCESS_LOCAL_WRITE; - switch (memreg) { + switch (memreg) { + case RPCRDMA_FRMR: + break; #if RPCRDMA_PERSISTENT_REGISTRATION - case RPCRDMA_ALLPHYSICAL: - mem_priv |= IB_ACCESS_REMOTE_WRITE; - mem_priv |= IB_ACCESS_REMOTE_READ; - break; + case RPCRDMA_ALLPHYSICAL: + mem_priv = IB_ACCESS_LOCAL_WRITE | + IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_READ; + goto register_setup; #endif - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - mem_priv |= IB_ACCESS_MW_BIND; - break; - default: + case RPCRDMA_MTHCAFMR: + if (ia->ri_have_dma_lkey) break; - } + mem_priv = IB_ACCESS_LOCAL_WRITE; +#if RPCRDMA_PERSISTENT_REGISTRATION + register_setup: +#endif ia->ri_bind_mem = ib_get_dma_mr(ia->ri_pd, mem_priv); if (IS_ERR(ia->ri_bind_mem)) { printk(KERN_ALERT "%s: ib_get_dma_mr for " - "phys register failed with %lX\n\t" - "Will continue with degraded performance\n", + "phys register failed with %lX\n", __func__, PTR_ERR(ia->ri_bind_mem)); - memreg = RPCRDMA_REGISTER; - ia->ri_bind_mem = NULL; + rc = -ENOMEM; + goto out2; } + break; + default: + printk(KERN_ERR "RPC: Unsupported memory " + "registration mode: %d\n", memreg); + rc = -ENOMEM; + goto out2; } + dprintk("RPC: %s: memory registration strategy is %d\n", + __func__, memreg); /* Else will do memory reg/dereg for each chunk */ ia->ri_memreg_strategy = memreg; @@ -483,6 +616,7 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) return 0; out2: rdma_destroy_id(ia->ri_id); + ia->ri_id = NULL; out1: return rc; } @@ -503,15 +637,17 @@ rpcrdma_ia_close(struct rpcrdma_ia *ia) dprintk("RPC: %s: ib_dereg_mr returned %i\n", __func__, rc); } - if (ia->ri_id != NULL && !IS_ERR(ia->ri_id) && ia->ri_id->qp) - rdma_destroy_qp(ia->ri_id); + if (ia->ri_id != NULL && !IS_ERR(ia->ri_id)) { + if (ia->ri_id->qp) + rdma_destroy_qp(ia->ri_id); + rdma_destroy_id(ia->ri_id); + ia->ri_id = NULL; + } if (ia->ri_pd != NULL && !IS_ERR(ia->ri_pd)) { rc = ib_dealloc_pd(ia->ri_pd); dprintk("RPC: %s: ib_dealloc_pd returned %i\n", __func__, rc); } - if (ia->ri_id != NULL && !IS_ERR(ia->ri_id)) - rdma_destroy_id(ia->ri_id); } /* @@ -522,6 +658,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, struct rpcrdma_create_data_internal *cdata) { struct ib_device_attr devattr; + struct ib_cq *sendcq, *recvcq; int rc, err; rc = ib_query_device(ia->ri_id->device, &devattr); @@ -541,14 +678,42 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, ep->rep_attr.srq = NULL; ep->rep_attr.cap.max_send_wr = cdata->max_requests; switch (ia->ri_memreg_strategy) { - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - /* Add room for mw_binds+unbinds - overkill! */ - ep->rep_attr.cap.max_send_wr++; - ep->rep_attr.cap.max_send_wr *= (2 * RPCRDMA_MAX_SEGS); - if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) - return -EINVAL; + case RPCRDMA_FRMR: { + int depth = 7; + + /* Add room for frmr register and invalidate WRs. + * 1. FRMR reg WR for head + * 2. FRMR invalidate WR for head + * 3. N FRMR reg WRs for pagelist + * 4. N FRMR invalidate WRs for pagelist + * 5. FRMR reg WR for tail + * 6. FRMR invalidate WR for tail + * 7. The RDMA_SEND WR + */ + + /* Calculate N if the device max FRMR depth is smaller than + * RPCRDMA_MAX_DATA_SEGS. + */ + if (ia->ri_max_frmr_depth < RPCRDMA_MAX_DATA_SEGS) { + int delta = RPCRDMA_MAX_DATA_SEGS - + ia->ri_max_frmr_depth; + + do { + depth += 2; /* FRMR reg + invalidate */ + delta -= ia->ri_max_frmr_depth; + } while (delta > 0); + + } + ep->rep_attr.cap.max_send_wr *= depth; + if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) { + cdata->max_requests = devattr.max_qp_wr / depth; + if (!cdata->max_requests) + return -EINVAL; + ep->rep_attr.cap.max_send_wr = cdata->max_requests * + depth; + } break; + } default: break; } @@ -569,46 +734,51 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, ep->rep_attr.cap.max_recv_sge); /* set trigger for requesting send completion */ - ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 /* - 1*/; - switch (ia->ri_memreg_strategy) { - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - ep->rep_cqinit -= RPCRDMA_MAX_SEGS; - break; - default: - break; - } + ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 - 1; if (ep->rep_cqinit <= 2) ep->rep_cqinit = 0; INIT_CQCOUNT(ep); ep->rep_ia = ia; init_waitqueue_head(&ep->rep_connect_wait); + INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker); - /* - * Create a single cq for receive dto and mw_bind (only ever - * care about unbind, really). Send completions are suppressed. - * Use single threaded tasklet upcalls to maintain ordering. - */ - ep->rep_cq = ib_create_cq(ia->ri_id->device, rpcrdma_cq_event_upcall, - rpcrdma_cq_async_error_upcall, NULL, - ep->rep_attr.cap.max_recv_wr + + sendcq = ib_create_cq(ia->ri_id->device, rpcrdma_sendcq_upcall, + rpcrdma_cq_async_error_upcall, ep, ep->rep_attr.cap.max_send_wr + 1, 0); - if (IS_ERR(ep->rep_cq)) { - rc = PTR_ERR(ep->rep_cq); - dprintk("RPC: %s: ib_create_cq failed: %i\n", + if (IS_ERR(sendcq)) { + rc = PTR_ERR(sendcq); + dprintk("RPC: %s: failed to create send CQ: %i\n", __func__, rc); goto out1; } - rc = ib_req_notify_cq(ep->rep_cq, IB_CQ_NEXT_COMP); + rc = ib_req_notify_cq(sendcq, IB_CQ_NEXT_COMP); if (rc) { dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", __func__, rc); goto out2; } - ep->rep_attr.send_cq = ep->rep_cq; - ep->rep_attr.recv_cq = ep->rep_cq; + recvcq = ib_create_cq(ia->ri_id->device, rpcrdma_recvcq_upcall, + rpcrdma_cq_async_error_upcall, ep, + ep->rep_attr.cap.max_recv_wr + 1, 0); + if (IS_ERR(recvcq)) { + rc = PTR_ERR(recvcq); + dprintk("RPC: %s: failed to create recv CQ: %i\n", + __func__, rc); + goto out2; + } + + rc = ib_req_notify_cq(recvcq, IB_CQ_NEXT_COMP); + if (rc) { + dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", + __func__, rc); + ib_destroy_cq(recvcq); + goto out2; + } + + ep->rep_attr.send_cq = sendcq; + ep->rep_attr.recv_cq = recvcq; /* Initialize cma parameters */ @@ -617,29 +787,11 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, ep->rep_remote_cma.private_data_len = 0; /* Client offers RDMA Read but does not initiate */ - switch (ia->ri_memreg_strategy) { - case RPCRDMA_BOUNCEBUFFERS: - ep->rep_remote_cma.responder_resources = 0; - break; - case RPCRDMA_MTHCAFMR: - case RPCRDMA_REGISTER: - ep->rep_remote_cma.responder_resources = cdata->max_requests * - (RPCRDMA_MAX_DATA_SEGS / 8); - break; - case RPCRDMA_MEMWINDOWS: - case RPCRDMA_MEMWINDOWS_ASYNC: -#if RPCRDMA_PERSISTENT_REGISTRATION - case RPCRDMA_ALLPHYSICAL: -#endif - ep->rep_remote_cma.responder_resources = cdata->max_requests * - (RPCRDMA_MAX_DATA_SEGS / 2); - break; - default: - break; - } - if (ep->rep_remote_cma.responder_resources > devattr.max_qp_rd_atom) - ep->rep_remote_cma.responder_resources = devattr.max_qp_rd_atom; ep->rep_remote_cma.initiator_depth = 0; + if (devattr.max_qp_rd_atom > 32) /* arbitrary but <= 255 */ + ep->rep_remote_cma.responder_resources = 32; + else + ep->rep_remote_cma.responder_resources = devattr.max_qp_rd_atom; ep->rep_remote_cma.retry_count = 7; ep->rep_remote_cma.flow_control = 0; @@ -648,7 +800,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, return 0; out2: - err = ib_destroy_cq(ep->rep_cq); + err = ib_destroy_cq(sendcq); if (err) dprintk("RPC: %s: ib_destroy_cq returned %i\n", __func__, err); @@ -662,11 +814,8 @@ out1: * Disconnect and destroy endpoint. After this, the only * valid operations on the ep are to free it (if dynamically * allocated) or re-create it. - * - * The caller's error handling must be sure to not leak the endpoint - * if this function fails. */ -int +void rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) { int rc; @@ -674,33 +823,34 @@ rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) dprintk("RPC: %s: entering, connected is %d\n", __func__, ep->rep_connected); + cancel_delayed_work_sync(&ep->rep_connect_worker); + if (ia->ri_id->qp) { rc = rpcrdma_ep_disconnect(ep, ia); if (rc) dprintk("RPC: %s: rpcrdma_ep_disconnect" " returned %i\n", __func__, rc); + rdma_destroy_qp(ia->ri_id); + ia->ri_id->qp = NULL; } - ep->rep_func = NULL; - /* padding - could be done in rpcrdma_buffer_destroy... */ if (ep->rep_pad_mr) { rpcrdma_deregister_internal(ia, ep->rep_pad_mr, &ep->rep_pad); ep->rep_pad_mr = NULL; } - if (ia->ri_id->qp) { - rdma_destroy_qp(ia->ri_id); - ia->ri_id->qp = NULL; - } - - rpcrdma_clean_cq(ep->rep_cq); - rc = ib_destroy_cq(ep->rep_cq); + rpcrdma_clean_cq(ep->rep_attr.recv_cq); + rc = ib_destroy_cq(ep->rep_attr.recv_cq); if (rc) dprintk("RPC: %s: ib_destroy_cq returned %i\n", __func__, rc); - return rc; + rpcrdma_clean_cq(ep->rep_attr.send_cq); + rc = ib_destroy_cq(ep->rep_attr.send_cq); + if (rc) + dprintk("RPC: %s: ib_destroy_cq returned %i\n", + __func__, rc); } /* @@ -712,22 +862,24 @@ rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) struct rdma_cm_id *id; int rc = 0; int retry_count = 0; - int reconnect = (ep->rep_connected != 0); - if (reconnect) { + if (ep->rep_connected != 0) { struct rpcrdma_xprt *xprt; retry: + dprintk("RPC: %s: reconnecting...\n", __func__); rc = rpcrdma_ep_disconnect(ep, ia); if (rc && rc != -ENOTCONN) dprintk("RPC: %s: rpcrdma_ep_disconnect" " status %i\n", __func__, rc); - rpcrdma_clean_cq(ep->rep_cq); + + rpcrdma_clean_cq(ep->rep_attr.recv_cq); + rpcrdma_clean_cq(ep->rep_attr.send_cq); xprt = container_of(ia, struct rpcrdma_xprt, rx_ia); id = rpcrdma_create_id(xprt, ia, (struct sockaddr *)&xprt->rx_data.addr); if (IS_ERR(id)) { - rc = PTR_ERR(id); + rc = -EHOSTUNREACH; goto out; } /* TEMP TEMP TEMP - fail if new device: @@ -741,42 +893,32 @@ retry: printk("RPC: %s: can't reconnect on " "different device!\n", __func__); rdma_destroy_id(id); - rc = -ENETDOWN; + rc = -ENETUNREACH; goto out; } /* END TEMP */ + rc = rdma_create_qp(id, ia->ri_pd, &ep->rep_attr); + if (rc) { + dprintk("RPC: %s: rdma_create_qp failed %i\n", + __func__, rc); + rdma_destroy_id(id); + rc = -ENETUNREACH; + goto out; + } + rdma_destroy_qp(ia->ri_id); rdma_destroy_id(ia->ri_id); ia->ri_id = id; + } else { + dprintk("RPC: %s: connecting...\n", __func__); + rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr); + if (rc) { + dprintk("RPC: %s: rdma_create_qp failed %i\n", + __func__, rc); + /* do not update ep->rep_connected */ + return -ENETUNREACH; + } } - rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr); - if (rc) { - dprintk("RPC: %s: rdma_create_qp failed %i\n", - __func__, rc); - goto out; - } - -/* XXX Tavor device performs badly with 2K MTU! */ -if (strnicmp(ia->ri_id->device->dma_device->bus->name, "pci", 3) == 0) { - struct pci_dev *pcid = to_pci_dev(ia->ri_id->device->dma_device); - if (pcid->device == PCI_DEVICE_ID_MELLANOX_TAVOR && - (pcid->vendor == PCI_VENDOR_ID_MELLANOX || - pcid->vendor == PCI_VENDOR_ID_TOPSPIN)) { - struct ib_qp_attr attr = { - .path_mtu = IB_MTU_1024 - }; - rc = ib_modify_qp(ia->ri_id->qp, &attr, IB_QP_PATH_MTU); - } -} - - /* Theoretically a client initiator_depth > 0 is not needed, - * but many peers fail to complete the connection unless they - * == responder_resources! */ - if (ep->rep_remote_cma.initiator_depth != - ep->rep_remote_cma.responder_resources) - ep->rep_remote_cma.initiator_depth = - ep->rep_remote_cma.responder_resources; - ep->rep_connected = 0; rc = rdma_connect(ia->ri_id, &ep->rep_remote_cma); @@ -786,9 +928,6 @@ if (strnicmp(ia->ri_id->device->dma_device->bus->name, "pci", 3) == 0) { goto out; } - if (reconnect) - return 0; - wait_event_interruptible(ep->rep_connect_wait, ep->rep_connected != 0); /* @@ -797,22 +936,24 @@ if (strnicmp(ia->ri_id->device->dma_device->bus->name, "pci", 3) == 0) { * others indicate a transport condition which has already * undergone a best-effort. */ - if (ep->rep_connected == -ECONNREFUSED - && ++retry_count <= RDMA_CONNECT_RETRY_MAX) { + if (ep->rep_connected == -ECONNREFUSED && + ++retry_count <= RDMA_CONNECT_RETRY_MAX) { dprintk("RPC: %s: non-peer_reject, retry\n", __func__); goto retry; } if (ep->rep_connected <= 0) { /* Sometimes, the only way to reliably connect to remote * CMs is to use same nonzero values for ORD and IRD. */ - ep->rep_remote_cma.initiator_depth = - ep->rep_remote_cma.responder_resources; - if (ep->rep_remote_cma.initiator_depth == 0) - ++ep->rep_remote_cma.initiator_depth; - if (ep->rep_remote_cma.responder_resources == 0) - ++ep->rep_remote_cma.responder_resources; - if (retry_count++ == 0) + if (retry_count++ <= RDMA_CONNECT_RETRY_MAX + 1 && + (ep->rep_remote_cma.responder_resources == 0 || + ep->rep_remote_cma.initiator_depth != + ep->rep_remote_cma.responder_resources)) { + if (ep->rep_remote_cma.responder_resources == 0) + ep->rep_remote_cma.responder_resources = 1; + ep->rep_remote_cma.initiator_depth = + ep->rep_remote_cma.responder_resources; goto retry; + } rc = ep->rep_connected; } else { dprintk("RPC: %s: connected\n", __func__); @@ -838,7 +979,8 @@ rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) { int rc; - rpcrdma_clean_cq(ep->rep_cq); + rpcrdma_clean_cq(ep->rep_attr.recv_cq); + rpcrdma_clean_cq(ep->rep_attr.send_cq); rc = rdma_disconnect(ia->ri_id); if (!rc) { /* returns without wait if not connected */ @@ -861,8 +1003,9 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, struct rpcrdma_create_data_internal *cdata) { char *p; - size_t len; + size_t len, rlen, wlen; int i, rc; + struct rpcrdma_mw *r; buf->rb_max_requests = cdata->max_requests; spin_lock_init(&buf->rb_lock); @@ -873,7 +1016,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, * 2. arrays of struct rpcrdma_req to fill in pointers * 3. array of struct rpcrdma_rep for replies * 4. padding, if any - * 5. mw's, if any + * 5. mw's, fmr's or frmr's, if any * Send/recv buffers in req/rep need to be registered */ @@ -881,13 +1024,12 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, (sizeof(struct rpcrdma_req *) + sizeof(struct rpcrdma_rep *)); len += cdata->padding; switch (ia->ri_memreg_strategy) { - case RPCRDMA_MTHCAFMR: - /* TBD we are perhaps overallocating here */ - len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS * + case RPCRDMA_FRMR: + len += buf->rb_max_requests * RPCRDMA_MAX_SEGS * sizeof(struct rpcrdma_mw); break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: + case RPCRDMA_MTHCAFMR: + /* TBD we are perhaps overallocating here */ len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS * sizeof(struct rpcrdma_mw); break; @@ -921,21 +1063,40 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, } p += cdata->padding; - /* - * Allocate the fmr's, or mw's for mw_bind chunk registration. - * We "cycle" the mw's in order to minimize rkey reuse, - * and also reduce unbind-to-bind collision. - */ INIT_LIST_HEAD(&buf->rb_mws); + r = (struct rpcrdma_mw *)p; switch (ia->ri_memreg_strategy) { + case RPCRDMA_FRMR: + for (i = buf->rb_max_requests * RPCRDMA_MAX_SEGS; i; i--) { + r->r.frmr.fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd, + ia->ri_max_frmr_depth); + if (IS_ERR(r->r.frmr.fr_mr)) { + rc = PTR_ERR(r->r.frmr.fr_mr); + dprintk("RPC: %s: ib_alloc_fast_reg_mr" + " failed %i\n", __func__, rc); + goto out; + } + r->r.frmr.fr_pgl = ib_alloc_fast_reg_page_list( + ia->ri_id->device, + ia->ri_max_frmr_depth); + if (IS_ERR(r->r.frmr.fr_pgl)) { + rc = PTR_ERR(r->r.frmr.fr_pgl); + dprintk("RPC: %s: " + "ib_alloc_fast_reg_page_list " + "failed %i\n", __func__, rc); + + ib_dereg_mr(r->r.frmr.fr_mr); + goto out; + } + list_add(&r->mw_list, &buf->rb_mws); + ++r; + } + break; case RPCRDMA_MTHCAFMR: - { - struct rpcrdma_mw *r = (struct rpcrdma_mw *)p; - struct ib_fmr_attr fa = { - RPCRDMA_MAX_DATA_SEGS, 1, PAGE_SHIFT - }; /* TBD we are perhaps overallocating here */ for (i = (buf->rb_max_requests+1) * RPCRDMA_MAX_SEGS; i; i--) { + static struct ib_fmr_attr fa = + { RPCRDMA_MAX_DATA_SEGS, 1, PAGE_SHIFT }; r->r.fmr = ib_alloc_fmr(ia->ri_pd, IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ, &fa); @@ -948,25 +1109,6 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, list_add(&r->mw_list, &buf->rb_mws); ++r; } - } - break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - { - struct rpcrdma_mw *r = (struct rpcrdma_mw *)p; - /* Allocate one extra request's worth, for full cycling */ - for (i = (buf->rb_max_requests+1) * RPCRDMA_MAX_SEGS; i; i--) { - r->r.mw = ib_alloc_mw(ia->ri_pd); - if (IS_ERR(r->r.mw)) { - rc = PTR_ERR(r->r.mw); - dprintk("RPC: %s: ib_alloc_mw" - " failed %i\n", __func__, rc); - goto out; - } - list_add(&r->mw_list, &buf->rb_mws); - ++r; - } - } break; default: break; @@ -976,16 +1118,16 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, * Allocate/init the request/reply buffers. Doing this * using kmalloc for now -- one for each buf. */ + wlen = 1 << fls(cdata->inline_wsize + sizeof(struct rpcrdma_req)); + rlen = 1 << fls(cdata->inline_rsize + sizeof(struct rpcrdma_rep)); + dprintk("RPC: %s: wlen = %zu, rlen = %zu\n", + __func__, wlen, rlen); + for (i = 0; i < buf->rb_max_requests; i++) { struct rpcrdma_req *req; struct rpcrdma_rep *rep; - len = cdata->inline_wsize + sizeof(struct rpcrdma_req); - /* RPC layer requests *double* size + 1K RPC_SLACK_SPACE! */ - /* Typical ~2400b, so rounding up saves work later */ - if (len < 4096) - len = 4096; - req = kmalloc(len, GFP_KERNEL); + req = kmalloc(wlen, GFP_KERNEL); if (req == NULL) { dprintk("RPC: %s: request buffer %d alloc" " failed\n", __func__, i); @@ -997,16 +1139,16 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, buf->rb_send_bufs[i]->rl_buffer = buf; rc = rpcrdma_register_internal(ia, req->rl_base, - len - offsetof(struct rpcrdma_req, rl_base), + wlen - offsetof(struct rpcrdma_req, rl_base), &buf->rb_send_bufs[i]->rl_handle, &buf->rb_send_bufs[i]->rl_iov); if (rc) goto out; - buf->rb_send_bufs[i]->rl_size = len-sizeof(struct rpcrdma_req); + buf->rb_send_bufs[i]->rl_size = wlen - + sizeof(struct rpcrdma_req); - len = cdata->inline_rsize + sizeof(struct rpcrdma_rep); - rep = kmalloc(len, GFP_KERNEL); + rep = kmalloc(rlen, GFP_KERNEL); if (rep == NULL) { dprintk("RPC: %s: reply buffer %d alloc failed\n", __func__, i); @@ -1016,10 +1158,9 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, memset(rep, 0, sizeof(struct rpcrdma_rep)); buf->rb_recv_bufs[i] = rep; buf->rb_recv_bufs[i]->rr_buffer = buf; - init_waitqueue_head(&rep->rr_unbind); rc = rpcrdma_register_internal(ia, rep->rr_base, - len - offsetof(struct rpcrdma_rep, rr_base), + rlen - offsetof(struct rpcrdma_rep, rr_base), &buf->rb_recv_bufs[i]->rr_handle, &buf->rb_recv_bufs[i]->rr_iov); if (rc) @@ -1046,10 +1187,10 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) { int rc, i; struct rpcrdma_ia *ia = rdmab_to_ia(buf); + struct rpcrdma_mw *r; /* clean up in reverse order from create * 1. recv mr memory (mr free, then kfree) - * 1a. bind mw memory * 2. send mr memory (mr free, then kfree) * 3. padding (if any) [moved to rpcrdma_ep_destroy] * 4. arrays @@ -1064,33 +1205,6 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) kfree(buf->rb_recv_bufs[i]); } if (buf->rb_send_bufs && buf->rb_send_bufs[i]) { - while (!list_empty(&buf->rb_mws)) { - struct rpcrdma_mw *r; - r = list_entry(buf->rb_mws.next, - struct rpcrdma_mw, mw_list); - list_del(&r->mw_list); - switch (ia->ri_memreg_strategy) { - case RPCRDMA_MTHCAFMR: - rc = ib_dealloc_fmr(r->r.fmr); - if (rc) - dprintk("RPC: %s:" - " ib_dealloc_fmr" - " failed %i\n", - __func__, rc); - break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - rc = ib_dealloc_mw(r->r.mw); - if (rc) - dprintk("RPC: %s:" - " ib_dealloc_mw" - " failed %i\n", - __func__, rc); - break; - default: - break; - } - } rpcrdma_deregister_internal(ia, buf->rb_send_bufs[i]->rl_handle, &buf->rb_send_bufs[i]->rl_iov); @@ -1098,6 +1212,33 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) } } + while (!list_empty(&buf->rb_mws)) { + r = list_entry(buf->rb_mws.next, + struct rpcrdma_mw, mw_list); + list_del(&r->mw_list); + switch (ia->ri_memreg_strategy) { + case RPCRDMA_FRMR: + rc = ib_dereg_mr(r->r.frmr.fr_mr); + if (rc) + dprintk("RPC: %s:" + " ib_dereg_mr" + " failed %i\n", + __func__, rc); + ib_free_fast_reg_page_list(r->r.frmr.fr_pgl); + break; + case RPCRDMA_MTHCAFMR: + rc = ib_dealloc_fmr(r->r.fmr); + if (rc) + dprintk("RPC: %s:" + " ib_dealloc_fmr" + " failed %i\n", + __func__, rc); + break; + default: + break; + } + } + kfree(buf->rb_pool); } @@ -1115,6 +1256,8 @@ rpcrdma_buffer_get(struct rpcrdma_buffer *buffers) { struct rpcrdma_req *req; unsigned long flags; + int i; + struct rpcrdma_mw *r; spin_lock_irqsave(&buffers->rb_lock, flags); if (buffers->rb_send_index == buffers->rb_max_requests) { @@ -1135,9 +1278,8 @@ rpcrdma_buffer_get(struct rpcrdma_buffer *buffers) } buffers->rb_send_bufs[buffers->rb_send_index++] = NULL; if (!list_empty(&buffers->rb_mws)) { - int i = RPCRDMA_MAX_SEGS - 1; + i = RPCRDMA_MAX_SEGS - 1; do { - struct rpcrdma_mw *r; r = list_entry(buffers->rb_mws.next, struct rpcrdma_mw, mw_list); list_del(&r->mw_list); @@ -1160,20 +1302,17 @@ rpcrdma_buffer_put(struct rpcrdma_req *req) int i; unsigned long flags; - BUG_ON(req->rl_nchunks != 0); spin_lock_irqsave(&buffers->rb_lock, flags); buffers->rb_send_bufs[--buffers->rb_send_index] = req; req->rl_niovs = 0; if (req->rl_reply) { buffers->rb_recv_bufs[--buffers->rb_recv_index] = req->rl_reply; - init_waitqueue_head(&req->rl_reply->rr_unbind); req->rl_reply->rr_func = NULL; req->rl_reply = NULL; } switch (ia->ri_memreg_strategy) { + case RPCRDMA_FRMR: case RPCRDMA_MTHCAFMR: - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: /* * Cycle mw's back in reverse order, and "spin" them. * This delays and scrambles reuse as much as possible. @@ -1218,8 +1357,7 @@ rpcrdma_recv_buffer_get(struct rpcrdma_req *req) /* * Put reply buffers back into pool when not attached to - * request. This happens in error conditions, and when - * aborting unbinds. Pre-decrement counter/array index. + * request. This happens in error conditions. */ void rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep) @@ -1252,7 +1390,11 @@ rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len, va, len, DMA_BIDIRECTIONAL); iov->length = len; - if (ia->ri_bind_mem != NULL) { + if (ia->ri_have_dma_lkey) { + *mrp = NULL; + iov->lkey = ia->ri_dma_lkey; + return 0; + } else if (ia->ri_bind_mem != NULL) { *mrp = NULL; iov->lkey = ia->ri_bind_mem->lkey; return 0; @@ -1316,6 +1458,12 @@ rpcrdma_map_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg, int writing) seg->mr_dma = ib_dma_map_single(ia->ri_id->device, seg->mr_offset, seg->mr_dmalen, seg->mr_dir); + if (ib_dma_mapping_error(ia->ri_id->device, seg->mr_dma)) { + dprintk("RPC: %s: mr_dma %llx mr_offset %p mr_dma_len %zu\n", + __func__, + (unsigned long long)seg->mr_dma, + seg->mr_offset, seg->mr_dmalen); + } } static void @@ -1329,15 +1477,198 @@ rpcrdma_unmap_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg) seg->mr_dma, seg->mr_dmalen, seg->mr_dir); } +static int +rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg, + int *nsegs, int writing, struct rpcrdma_ia *ia, + struct rpcrdma_xprt *r_xprt) +{ + struct rpcrdma_mr_seg *seg1 = seg; + struct ib_send_wr invalidate_wr, frmr_wr, *bad_wr, *post_wr; + + u8 key; + int len, pageoff; + int i, rc; + int seg_len; + u64 pa; + int page_no; + + pageoff = offset_in_page(seg1->mr_offset); + seg1->mr_offset -= pageoff; /* start of page */ + seg1->mr_len += pageoff; + len = -pageoff; + if (*nsegs > ia->ri_max_frmr_depth) + *nsegs = ia->ri_max_frmr_depth; + for (page_no = i = 0; i < *nsegs;) { + rpcrdma_map_one(ia, seg, writing); + pa = seg->mr_dma; + for (seg_len = seg->mr_len; seg_len > 0; seg_len -= PAGE_SIZE) { + seg1->mr_chunk.rl_mw->r.frmr.fr_pgl-> + page_list[page_no++] = pa; + pa += PAGE_SIZE; + } + len += seg->mr_len; + ++seg; + ++i; + /* Check for holes */ + if ((i < *nsegs && offset_in_page(seg->mr_offset)) || + offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) + break; + } + dprintk("RPC: %s: Using frmr %p to map %d segments\n", + __func__, seg1->mr_chunk.rl_mw, i); + + if (unlikely(seg1->mr_chunk.rl_mw->r.frmr.state == FRMR_IS_VALID)) { + dprintk("RPC: %s: frmr %x left valid, posting invalidate.\n", + __func__, + seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey); + /* Invalidate before using. */ + memset(&invalidate_wr, 0, sizeof invalidate_wr); + invalidate_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw; + invalidate_wr.next = &frmr_wr; + invalidate_wr.opcode = IB_WR_LOCAL_INV; + invalidate_wr.send_flags = IB_SEND_SIGNALED; + invalidate_wr.ex.invalidate_rkey = + seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; + DECR_CQCOUNT(&r_xprt->rx_ep); + post_wr = &invalidate_wr; + } else + post_wr = &frmr_wr; + + /* Prepare FRMR WR */ + memset(&frmr_wr, 0, sizeof frmr_wr); + frmr_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw; + frmr_wr.opcode = IB_WR_FAST_REG_MR; + frmr_wr.send_flags = IB_SEND_SIGNALED; + frmr_wr.wr.fast_reg.iova_start = seg1->mr_dma; + frmr_wr.wr.fast_reg.page_list = seg1->mr_chunk.rl_mw->r.frmr.fr_pgl; + frmr_wr.wr.fast_reg.page_list_len = page_no; + frmr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; + frmr_wr.wr.fast_reg.length = page_no << PAGE_SHIFT; + if (frmr_wr.wr.fast_reg.length < len) { + while (seg1->mr_nsegs--) + rpcrdma_unmap_one(ia, seg++); + return -EIO; + } + + /* Bump the key */ + key = (u8)(seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey & 0x000000FF); + ib_update_fast_reg_key(seg1->mr_chunk.rl_mw->r.frmr.fr_mr, ++key); + + frmr_wr.wr.fast_reg.access_flags = (writing ? + IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE : + IB_ACCESS_REMOTE_READ); + frmr_wr.wr.fast_reg.rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; + DECR_CQCOUNT(&r_xprt->rx_ep); + + rc = ib_post_send(ia->ri_id->qp, post_wr, &bad_wr); + + if (rc) { + dprintk("RPC: %s: failed ib_post_send for register," + " status %i\n", __func__, rc); + while (i--) + rpcrdma_unmap_one(ia, --seg); + } else { + seg1->mr_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; + seg1->mr_base = seg1->mr_dma + pageoff; + seg1->mr_nsegs = i; + seg1->mr_len = len; + } + *nsegs = i; + return rc; +} + +static int +rpcrdma_deregister_frmr_external(struct rpcrdma_mr_seg *seg, + struct rpcrdma_ia *ia, struct rpcrdma_xprt *r_xprt) +{ + struct rpcrdma_mr_seg *seg1 = seg; + struct ib_send_wr invalidate_wr, *bad_wr; + int rc; + + while (seg1->mr_nsegs--) + rpcrdma_unmap_one(ia, seg++); + + memset(&invalidate_wr, 0, sizeof invalidate_wr); + invalidate_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw; + invalidate_wr.opcode = IB_WR_LOCAL_INV; + invalidate_wr.send_flags = IB_SEND_SIGNALED; + invalidate_wr.ex.invalidate_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; + DECR_CQCOUNT(&r_xprt->rx_ep); + + rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr); + if (rc) + dprintk("RPC: %s: failed ib_post_send for invalidate," + " status %i\n", __func__, rc); + return rc; +} + +static int +rpcrdma_register_fmr_external(struct rpcrdma_mr_seg *seg, + int *nsegs, int writing, struct rpcrdma_ia *ia) +{ + struct rpcrdma_mr_seg *seg1 = seg; + u64 physaddrs[RPCRDMA_MAX_DATA_SEGS]; + int len, pageoff, i, rc; + + pageoff = offset_in_page(seg1->mr_offset); + seg1->mr_offset -= pageoff; /* start of page */ + seg1->mr_len += pageoff; + len = -pageoff; + if (*nsegs > RPCRDMA_MAX_DATA_SEGS) + *nsegs = RPCRDMA_MAX_DATA_SEGS; + for (i = 0; i < *nsegs;) { + rpcrdma_map_one(ia, seg, writing); + physaddrs[i] = seg->mr_dma; + len += seg->mr_len; + ++seg; + ++i; + /* Check for holes */ + if ((i < *nsegs && offset_in_page(seg->mr_offset)) || + offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) + break; + } + rc = ib_map_phys_fmr(seg1->mr_chunk.rl_mw->r.fmr, + physaddrs, i, seg1->mr_dma); + if (rc) { + dprintk("RPC: %s: failed ib_map_phys_fmr " + "%u@0x%llx+%i (%d)... status %i\n", __func__, + len, (unsigned long long)seg1->mr_dma, + pageoff, i, rc); + while (i--) + rpcrdma_unmap_one(ia, --seg); + } else { + seg1->mr_rkey = seg1->mr_chunk.rl_mw->r.fmr->rkey; + seg1->mr_base = seg1->mr_dma + pageoff; + seg1->mr_nsegs = i; + seg1->mr_len = len; + } + *nsegs = i; + return rc; +} + +static int +rpcrdma_deregister_fmr_external(struct rpcrdma_mr_seg *seg, + struct rpcrdma_ia *ia) +{ + struct rpcrdma_mr_seg *seg1 = seg; + LIST_HEAD(l); + int rc; + + list_add(&seg1->mr_chunk.rl_mw->r.fmr->list, &l); + rc = ib_unmap_fmr(&l); + while (seg1->mr_nsegs--) + rpcrdma_unmap_one(ia, seg++); + if (rc) + dprintk("RPC: %s: failed ib_unmap_fmr," + " status %i\n", __func__, rc); + return rc; +} + int rpcrdma_register_external(struct rpcrdma_mr_seg *seg, int nsegs, int writing, struct rpcrdma_xprt *r_xprt) { struct rpcrdma_ia *ia = &r_xprt->rx_ia; - int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE : - IB_ACCESS_REMOTE_READ); - struct rpcrdma_mr_seg *seg1 = seg; - int i; int rc = 0; switch (ia->ri_memreg_strategy) { @@ -1352,115 +1683,18 @@ rpcrdma_register_external(struct rpcrdma_mr_seg *seg, break; #endif - /* Registration using fast memory registration */ - case RPCRDMA_MTHCAFMR: - { - u64 physaddrs[RPCRDMA_MAX_DATA_SEGS]; - int len, pageoff = offset_in_page(seg->mr_offset); - seg1->mr_offset -= pageoff; /* start of page */ - seg1->mr_len += pageoff; - len = -pageoff; - if (nsegs > RPCRDMA_MAX_DATA_SEGS) - nsegs = RPCRDMA_MAX_DATA_SEGS; - for (i = 0; i < nsegs;) { - rpcrdma_map_one(ia, seg, writing); - physaddrs[i] = seg->mr_dma; - len += seg->mr_len; - ++seg; - ++i; - /* Check for holes */ - if ((i < nsegs && offset_in_page(seg->mr_offset)) || - offset_in_page((seg-1)->mr_offset+(seg-1)->mr_len)) - break; - } - nsegs = i; - rc = ib_map_phys_fmr(seg1->mr_chunk.rl_mw->r.fmr, - physaddrs, nsegs, seg1->mr_dma); - if (rc) { - dprintk("RPC: %s: failed ib_map_phys_fmr " - "%u@0x%llx+%i (%d)... status %i\n", __func__, - len, (unsigned long long)seg1->mr_dma, - pageoff, nsegs, rc); - while (nsegs--) - rpcrdma_unmap_one(ia, --seg); - } else { - seg1->mr_rkey = seg1->mr_chunk.rl_mw->r.fmr->rkey; - seg1->mr_base = seg1->mr_dma + pageoff; - seg1->mr_nsegs = nsegs; - seg1->mr_len = len; - } - } + /* Registration using frmr registration */ + case RPCRDMA_FRMR: + rc = rpcrdma_register_frmr_external(seg, &nsegs, writing, ia, r_xprt); break; - /* Registration using memory windows */ - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - { - struct ib_mw_bind param; - rpcrdma_map_one(ia, seg, writing); - param.mr = ia->ri_bind_mem; - param.wr_id = 0ULL; /* no send cookie */ - param.addr = seg->mr_dma; - param.length = seg->mr_len; - param.send_flags = 0; - param.mw_access_flags = mem_priv; - - DECR_CQCOUNT(&r_xprt->rx_ep); - rc = ib_bind_mw(ia->ri_id->qp, - seg->mr_chunk.rl_mw->r.mw, ¶m); - if (rc) { - dprintk("RPC: %s: failed ib_bind_mw " - "%u@0x%llx status %i\n", - __func__, seg->mr_len, - (unsigned long long)seg->mr_dma, rc); - rpcrdma_unmap_one(ia, seg); - } else { - seg->mr_rkey = seg->mr_chunk.rl_mw->r.mw->rkey; - seg->mr_base = param.addr; - seg->mr_nsegs = 1; - nsegs = 1; - } - } + /* Registration using fmr memory registration */ + case RPCRDMA_MTHCAFMR: + rc = rpcrdma_register_fmr_external(seg, &nsegs, writing, ia); break; - /* Default registration each time */ default: - { - struct ib_phys_buf ipb[RPCRDMA_MAX_DATA_SEGS]; - int len = 0; - if (nsegs > RPCRDMA_MAX_DATA_SEGS) - nsegs = RPCRDMA_MAX_DATA_SEGS; - for (i = 0; i < nsegs;) { - rpcrdma_map_one(ia, seg, writing); - ipb[i].addr = seg->mr_dma; - ipb[i].size = seg->mr_len; - len += seg->mr_len; - ++seg; - ++i; - /* Check for holes */ - if ((i < nsegs && offset_in_page(seg->mr_offset)) || - offset_in_page((seg-1)->mr_offset+(seg-1)->mr_len)) - break; - } - nsegs = i; - seg1->mr_base = seg1->mr_dma; - seg1->mr_chunk.rl_mr = ib_reg_phys_mr(ia->ri_pd, - ipb, nsegs, mem_priv, &seg1->mr_base); - if (IS_ERR(seg1->mr_chunk.rl_mr)) { - rc = PTR_ERR(seg1->mr_chunk.rl_mr); - dprintk("RPC: %s: failed ib_reg_phys_mr " - "%u@0x%llx (%d)... status %i\n", - __func__, len, - (unsigned long long)seg1->mr_dma, nsegs, rc); - while (nsegs--) - rpcrdma_unmap_one(ia, --seg); - } else { - seg1->mr_rkey = seg1->mr_chunk.rl_mr->rkey; - seg1->mr_nsegs = nsegs; - seg1->mr_len = len; - } - } - break; + return -1; } if (rc) return -1; @@ -1470,80 +1704,30 @@ rpcrdma_register_external(struct rpcrdma_mr_seg *seg, int rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg, - struct rpcrdma_xprt *r_xprt, void *r) + struct rpcrdma_xprt *r_xprt) { struct rpcrdma_ia *ia = &r_xprt->rx_ia; - struct rpcrdma_mr_seg *seg1 = seg; int nsegs = seg->mr_nsegs, rc; switch (ia->ri_memreg_strategy) { #if RPCRDMA_PERSISTENT_REGISTRATION case RPCRDMA_ALLPHYSICAL: - BUG_ON(nsegs != 1); rpcrdma_unmap_one(ia, seg); - rc = 0; break; #endif - case RPCRDMA_MTHCAFMR: - { - LIST_HEAD(l); - list_add(&seg->mr_chunk.rl_mw->r.fmr->list, &l); - rc = ib_unmap_fmr(&l); - while (seg1->mr_nsegs--) - rpcrdma_unmap_one(ia, seg++); - } - if (rc) - dprintk("RPC: %s: failed ib_unmap_fmr," - " status %i\n", __func__, rc); + case RPCRDMA_FRMR: + rc = rpcrdma_deregister_frmr_external(seg, ia, r_xprt); break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - { - struct ib_mw_bind param; - BUG_ON(nsegs != 1); - param.mr = ia->ri_bind_mem; - param.addr = 0ULL; /* unbind */ - param.length = 0; - param.mw_access_flags = 0; - if (r) { - param.wr_id = (u64) (unsigned long) r; - param.send_flags = IB_SEND_SIGNALED; - INIT_CQCOUNT(&r_xprt->rx_ep); - } else { - param.wr_id = 0ULL; - param.send_flags = 0; - DECR_CQCOUNT(&r_xprt->rx_ep); - } - rc = ib_bind_mw(ia->ri_id->qp, - seg->mr_chunk.rl_mw->r.mw, ¶m); - rpcrdma_unmap_one(ia, seg); - } - if (rc) - dprintk("RPC: %s: failed ib_(un)bind_mw," - " status %i\n", __func__, rc); - else - r = NULL; /* will upcall on completion */ + case RPCRDMA_MTHCAFMR: + rc = rpcrdma_deregister_fmr_external(seg, ia); break; default: - rc = ib_dereg_mr(seg1->mr_chunk.rl_mr); - seg1->mr_chunk.rl_mr = NULL; - while (seg1->mr_nsegs--) - rpcrdma_unmap_one(ia, seg++); - if (rc) - dprintk("RPC: %s: failed ib_dereg_mr," - " status %i\n", __func__, rc); break; } - if (r) { - struct rpcrdma_rep *rep = r; - void (*func)(struct rpcrdma_rep *) = rep->rr_func; - rep->rr_func = NULL; - func(rep); /* dereg done, callback now */ - } return nsegs; } @@ -1618,7 +1802,6 @@ rpcrdma_ep_post_recv(struct rpcrdma_ia *ia, ib_dma_sync_single_for_cpu(ia->ri_id->device, rep->rr_iov.addr, rep->rr_iov.length, DMA_BIDIRECTIONAL); - DECR_CQCOUNT(ep); rc = ib_post_recv(ia->ri_id->qp, &recv_wr, &recv_wr_fail); if (rc) diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 2427822f8bd..89e7cd47970 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -42,7 +42,8 @@ #include <linux/wait.h> /* wait_queue_head_t, etc */ #include <linux/spinlock.h> /* spinlock_t, etc */ -#include <asm/atomic.h> /* atomic_t, etc */ +#include <linux/atomic.h> /* atomic_t, etc */ +#include <linux/workqueue.h> /* struct work_struct */ #include <rdma/rdma_cm.h> /* RDMA connection api */ #include <rdma/ib_verbs.h> /* RDMA verbs api */ @@ -51,6 +52,9 @@ #include <linux/sunrpc/rpc_rdma.h> /* RPC/RDMA protocol */ #include <linux/sunrpc/xprtrdma.h> /* xprt parameters */ +#define RDMA_RESOLVE_TIMEOUT (5000) /* 5 seconds */ +#define RDMA_CONNECT_RETRY_MAX (2) /* retries if no listener backlog */ + /* * Interface Adapter -- one per transport instance */ @@ -58,21 +62,26 @@ struct rpcrdma_ia { struct rdma_cm_id *ri_id; struct ib_pd *ri_pd; struct ib_mr *ri_bind_mem; + u32 ri_dma_lkey; + int ri_have_dma_lkey; struct completion ri_done; int ri_async_rc; enum rpcrdma_memreg ri_memreg_strategy; + unsigned int ri_max_frmr_depth; }; /* * RDMA Endpoint -- one per transport instance */ +#define RPCRDMA_WC_BUDGET (128) +#define RPCRDMA_POLLSIZE (16) + struct rpcrdma_ep { atomic_t rep_cqcount; int rep_cqinit; int rep_connected; struct rpcrdma_ia *rep_ia; - struct ib_cq *rep_cq; struct ib_qp_init_attr rep_attr; wait_queue_head_t rep_connect_wait; struct ib_sge rep_pad; /* holds zeroed pad */ @@ -81,6 +90,9 @@ struct rpcrdma_ep { struct rpc_xprt *rep_xprt; /* for rep_func */ struct rdma_conn_param rep_remote_cma; struct sockaddr_storage rep_remote_addr; + struct delayed_work rep_connect_worker; + struct ib_wc rep_send_wcs[RPCRDMA_POLLSIZE]; + struct ib_wc rep_recv_wcs[RPCRDMA_POLLSIZE]; }; #define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit) @@ -104,7 +116,7 @@ struct rpcrdma_ep { */ /* temporary static scatter/gather max */ -#define RPCRDMA_MAX_DATA_SEGS (8) /* max scatter/gather */ +#define RPCRDMA_MAX_DATA_SEGS (64) /* max scatter/gather */ #define RPCRDMA_MAX_SEGS (RPCRDMA_MAX_DATA_SEGS + 2) /* head+tail = 2 */ #define MAX_RPCRDMAHDR (\ /* max supported RPC/RDMA header */ \ @@ -119,7 +131,6 @@ struct rpcrdma_rep { struct rpc_xprt *rr_xprt; /* needed for request/reply matching */ void (*rr_func)(struct rpcrdma_rep *);/* called by tasklet in softint */ struct list_head rr_list; /* tasklet list */ - wait_queue_head_t rr_unbind; /* optional unbind wait */ struct ib_sge rr_iov; /* for posting */ struct ib_mr *rr_handle; /* handle for mem in rr_iov */ char rr_base[MAX_RPCRDMAHDR]; /* minimal inline receive buffer */ @@ -154,8 +165,12 @@ struct rpcrdma_mr_seg { /* chunk descriptors */ struct ib_mr *rl_mr; /* if registered directly */ struct rpcrdma_mw { /* if registered from region */ union { - struct ib_mw *mw; struct ib_fmr *fmr; + struct { + struct ib_fast_reg_page_list *fr_pgl; + struct ib_mr *fr_mr; + enum { FRMR_IS_INVALID, FRMR_IS_VALID } state; + } frmr; } r; struct list_head mw_list; } *rl_mw; @@ -175,6 +190,7 @@ struct rpcrdma_req { size_t rl_size; /* actual length of buffer */ unsigned int rl_niovs; /* 0, 2 or 4 */ unsigned int rl_nchunks; /* non-zero if chunks */ + unsigned int rl_connect_cookie; /* retry detection */ struct rpcrdma_buffer *rl_buffer; /* home base for this structure */ struct rpcrdma_rep *rl_reply;/* holder for reply buffer */ struct rpcrdma_mr_seg rl_segments[RPCRDMA_MAX_SEGS];/* chunk segments */ @@ -196,9 +212,8 @@ struct rpcrdma_req { struct rpcrdma_buffer { spinlock_t rb_lock; /* protects indexes */ atomic_t rb_credits; /* most recent server credits */ - unsigned long rb_cwndscale; /* cached framework rpc_cwndscale */ int rb_max_requests;/* client max requests */ - struct list_head rb_mws; /* optional memory windows/fmrs */ + struct list_head rb_mws; /* optional memory windows/fmrs/frmrs */ int rb_send_index; struct rpcrdma_req **rb_send_bufs; int rb_recv_index; @@ -224,13 +239,13 @@ struct rpcrdma_create_data_internal { }; #define RPCRDMA_INLINE_READ_THRESHOLD(rq) \ - (rpcx_to_rdmad(rq->rq_task->tk_xprt).inline_rsize) + (rpcx_to_rdmad(rq->rq_xprt).inline_rsize) #define RPCRDMA_INLINE_WRITE_THRESHOLD(rq)\ - (rpcx_to_rdmad(rq->rq_task->tk_xprt).inline_wsize) + (rpcx_to_rdmad(rq->rq_xprt).inline_wsize) #define RPCRDMA_INLINE_PAD_VALUE(rq)\ - rpcx_to_rdmad(rq->rq_task->tk_xprt).padding + rpcx_to_rdmad(rq->rq_xprt).padding /* * Statistics for RPCRDMA @@ -273,6 +288,11 @@ struct rpcrdma_xprt { #define rpcx_to_rdmax(x) container_of(x, struct rpcrdma_xprt, xprt) #define rpcx_to_rdmad(x) (rpcx_to_rdmax(x)->rx_data) +/* Setting this to 0 ensures interoperability with early servers. + * Setting this to 1 enhances certain unaligned read/write performance. + * Default is 0, see sysctl entry and rpc_rdma.c rpcrdma_convert_iovs() */ +extern int xprt_rdma_pad_optimize; + /* * Interface Adapter calls - xprtrdma/verbs.c */ @@ -284,7 +304,7 @@ void rpcrdma_ia_close(struct rpcrdma_ia *); */ int rpcrdma_ep_create(struct rpcrdma_ep *, struct rpcrdma_ia *, struct rpcrdma_create_data_internal *); -int rpcrdma_ep_destroy(struct rpcrdma_ep *, struct rpcrdma_ia *); +void rpcrdma_ep_destroy(struct rpcrdma_ep *, struct rpcrdma_ia *); int rpcrdma_ep_connect(struct rpcrdma_ep *, struct rpcrdma_ia *); int rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *); @@ -314,11 +334,12 @@ int rpcrdma_deregister_internal(struct rpcrdma_ia *, int rpcrdma_register_external(struct rpcrdma_mr_seg *, int, int, struct rpcrdma_xprt *); int rpcrdma_deregister_external(struct rpcrdma_mr_seg *, - struct rpcrdma_xprt *, void *); + struct rpcrdma_xprt *); /* * RPC/RDMA connection management calls - xprtrdma/rpc_rdma.c */ +void rpcrdma_connect_worker(struct work_struct *); void rpcrdma_conn_func(struct rpcrdma_ep *); void rpcrdma_reply_handler(struct rpcrdma_rep *); @@ -327,4 +348,11 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *); */ int rpcrdma_marshal_req(struct rpc_rqst *); +/* Temporary NFS request map cache. Created in svc_rdma.c */ +extern struct kmem_cache *svc_rdma_map_cachep; +/* WR context cache. Created in svc_rdma.c */ +extern struct kmem_cache *svc_rdma_ctxt_cachep; +/* Workqueue created in svc_rdma.c */ +extern struct workqueue_struct *svc_rdma_wq; + #endif /* _LINUX_SUNRPC_XPRT_RDMA_H */ |