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-rw-r--r--net/sunrpc/xprtrdma/backchannel.c33
-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c301
-rw-r--r--net/sunrpc/xprtrdma/transport.c18
-rw-r--r--net/sunrpc/xprtrdma/verbs.c13
-rw-r--r--net/sunrpc/xprtrdma/xprt_rdma.h27
5 files changed, 207 insertions, 185 deletions
diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c
index 61a58f59133f..2c472e1b4827 100644
--- a/net/sunrpc/xprtrdma/backchannel.c
+++ b/net/sunrpc/xprtrdma/backchannel.c
@@ -206,7 +206,6 @@ int rpcrdma_bc_marshal_reply(struct rpc_rqst *rqst)
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
struct rpcrdma_msg *headerp;
- size_t rpclen;
headerp = rdmab_to_msg(req->rl_rdmabuf);
headerp->rm_xid = rqst->rq_xid;
@@ -218,36 +217,10 @@ int rpcrdma_bc_marshal_reply(struct rpc_rqst *rqst)
headerp->rm_body.rm_chunks[1] = xdr_zero;
headerp->rm_body.rm_chunks[2] = xdr_zero;
- rpclen = rqst->rq_svec[0].iov_len;
-
-#ifdef RPCRDMA_BACKCHANNEL_DEBUG
- pr_info("RPC: %s: rpclen %zd headerp 0x%p lkey 0x%x\n",
- __func__, rpclen, headerp, rdmab_lkey(req->rl_rdmabuf));
- pr_info("RPC: %s: RPC/RDMA: %*ph\n",
- __func__, (int)RPCRDMA_HDRLEN_MIN, headerp);
- pr_info("RPC: %s: RPC: %*ph\n",
- __func__, (int)rpclen, rqst->rq_svec[0].iov_base);
-#endif
-
- if (!rpcrdma_dma_map_regbuf(&r_xprt->rx_ia, req->rl_rdmabuf))
- goto out_map;
- req->rl_send_iov[0].addr = rdmab_addr(req->rl_rdmabuf);
- req->rl_send_iov[0].length = RPCRDMA_HDRLEN_MIN;
- req->rl_send_iov[0].lkey = rdmab_lkey(req->rl_rdmabuf);
-
- if (!rpcrdma_dma_map_regbuf(&r_xprt->rx_ia, req->rl_sendbuf))
- goto out_map;
- req->rl_send_iov[1].addr = rdmab_addr(req->rl_sendbuf);
- req->rl_send_iov[1].length = rpclen;
- req->rl_send_iov[1].lkey = rdmab_lkey(req->rl_sendbuf);
-
- req->rl_send_wr.num_sge = 2;
-
+ if (!rpcrdma_prepare_send_sges(&r_xprt->rx_ia, req, RPCRDMA_HDRLEN_MIN,
+ &rqst->rq_snd_buf, rpcrdma_noch))
+ return -EIO;
return 0;
-
-out_map:
- pr_err("rpcrdma: failed to DMA map a Send buffer\n");
- return -EIO;
}
/**
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 31a434d2f143..63bf0119f949 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -53,14 +53,6 @@
# define RPCDBG_FACILITY RPCDBG_TRANS
#endif
-enum rpcrdma_chunktype {
- rpcrdma_noch = 0,
- rpcrdma_readch,
- rpcrdma_areadch,
- rpcrdma_writech,
- rpcrdma_replych
-};
-
static const char transfertypes[][12] = {
"inline", /* no chunks */
"read list", /* some argument via rdma read */
@@ -157,42 +149,6 @@ static bool rpcrdma_results_inline(struct rpcrdma_xprt *r_xprt,
return rqst->rq_rcv_buf.buflen <= ia->ri_max_inline_read;
}
-static int
-rpcrdma_tail_pullup(struct xdr_buf *buf)
-{
- size_t tlen = buf->tail[0].iov_len;
- size_t skip = tlen & 3;
-
- /* Do not include the tail if it is only an XDR pad */
- if (tlen < 4)
- return 0;
-
- /* xdr_write_pages() adds a pad at the beginning of the tail
- * if the content in "buf->pages" is unaligned. Force the
- * tail's actual content to land at the next XDR position
- * after the head instead.
- */
- if (skip) {
- unsigned char *src, *dst;
- unsigned int count;
-
- src = buf->tail[0].iov_base;
- dst = buf->head[0].iov_base;
- dst += buf->head[0].iov_len;
-
- src += skip;
- tlen -= skip;
-
- dprintk("RPC: %s: skip=%zu, memmove(%p, %p, %zu)\n",
- __func__, skip, dst, src, tlen);
-
- for (count = tlen; count; count--)
- *dst++ = *src++;
- }
-
- return tlen;
-}
-
/* Split "vec" on page boundaries into segments. FMR registers pages,
* not a byte range. Other modes coalesce these segments into a single
* MR when they can.
@@ -503,74 +459,184 @@ rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt,
return iptr;
}
-/*
- * Copy write data inline.
- * This function is used for "small" requests. Data which is passed
- * to RPC via iovecs (or page list) is copied directly into the
- * pre-registered memory buffer for this request. For small amounts
- * of data, this is efficient. The cutoff value is tunable.
+/* Prepare the RPC-over-RDMA header SGE.
*/
-static void rpcrdma_inline_pullup(struct rpc_rqst *rqst)
+static bool
+rpcrdma_prepare_hdr_sge(struct rpcrdma_ia *ia, struct rpcrdma_req *req,
+ u32 len)
{
- int i, npages, curlen;
- int copy_len;
- unsigned char *srcp, *destp;
- struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
- int page_base;
- struct page **ppages;
+ struct rpcrdma_regbuf *rb = req->rl_rdmabuf;
+ struct ib_sge *sge = &req->rl_send_sge[0];
+
+ if (unlikely(!rpcrdma_regbuf_is_mapped(rb))) {
+ if (!__rpcrdma_dma_map_regbuf(ia, rb))
+ return false;
+ sge->addr = rdmab_addr(rb);
+ sge->lkey = rdmab_lkey(rb);
+ }
+ sge->length = len;
- destp = rqst->rq_svec[0].iov_base;
- curlen = rqst->rq_svec[0].iov_len;
- destp += curlen;
+ ib_dma_sync_single_for_device(ia->ri_device, sge->addr,
+ sge->length, DMA_TO_DEVICE);
+ req->rl_send_wr.num_sge++;
+ return true;
+}
- dprintk("RPC: %s: destp 0x%p len %d hdrlen %d\n",
- __func__, destp, rqst->rq_slen, curlen);
+/* Prepare the Send SGEs. The head and tail iovec, and each entry
+ * in the page list, gets its own SGE.
+ */
+static bool
+rpcrdma_prepare_msg_sges(struct rpcrdma_ia *ia, struct rpcrdma_req *req,
+ struct xdr_buf *xdr, enum rpcrdma_chunktype rtype)
+{
+ unsigned int sge_no, page_base, len, remaining;
+ struct rpcrdma_regbuf *rb = req->rl_sendbuf;
+ struct ib_device *device = ia->ri_device;
+ struct ib_sge *sge = req->rl_send_sge;
+ u32 lkey = ia->ri_pd->local_dma_lkey;
+ struct page *page, **ppages;
+
+ /* The head iovec is straightforward, as it is already
+ * DMA-mapped. Sync the content that has changed.
+ */
+ if (!rpcrdma_dma_map_regbuf(ia, rb))
+ return false;
+ sge_no = 1;
+ sge[sge_no].addr = rdmab_addr(rb);
+ sge[sge_no].length = xdr->head[0].iov_len;
+ sge[sge_no].lkey = rdmab_lkey(rb);
+ ib_dma_sync_single_for_device(device, sge[sge_no].addr,
+ sge[sge_no].length, DMA_TO_DEVICE);
+
+ /* If there is a Read chunk, the page list is being handled
+ * via explicit RDMA, and thus is skipped here. However, the
+ * tail iovec may include an XDR pad for the page list, as
+ * well as additional content, and may not reside in the
+ * same page as the head iovec.
+ */
+ if (rtype == rpcrdma_readch) {
+ len = xdr->tail[0].iov_len;
- copy_len = rqst->rq_snd_buf.page_len;
+ /* Do not include the tail if it is only an XDR pad */
+ if (len < 4)
+ goto out;
- 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;
+ page = virt_to_page(xdr->tail[0].iov_base);
+ page_base = (unsigned long)xdr->tail[0].iov_base & ~PAGE_MASK;
+
+ /* If the content in the page list is an odd length,
+ * xdr_write_pages() has added a pad at the beginning
+ * of the tail iovec. Force the tail's non-pad content
+ * to land at the next XDR position in the Send message.
+ */
+ page_base += len & 3;
+ len -= len & 3;
+ goto map_tail;
+ }
+
+ /* If there is a page list present, temporarily DMA map
+ * and prepare an SGE for each page to be sent.
+ */
+ if (xdr->page_len) {
+ ppages = xdr->pages + (xdr->page_base >> PAGE_SHIFT);
+ page_base = xdr->page_base & ~PAGE_MASK;
+ remaining = xdr->page_len;
+ while (remaining) {
+ sge_no++;
+ if (sge_no > RPCRDMA_MAX_SEND_SGES - 2)
+ goto out_mapping_overflow;
+
+ len = min_t(u32, PAGE_SIZE - page_base, remaining);
+ sge[sge_no].addr = ib_dma_map_page(device, *ppages,
+ page_base, len,
+ DMA_TO_DEVICE);
+ if (ib_dma_mapping_error(device, sge[sge_no].addr))
+ goto out_mapping_err;
+ sge[sge_no].length = len;
+ sge[sge_no].lkey = lkey;
+
+ req->rl_mapped_sges++;
+ ppages++;
+ remaining -= len;
+ page_base = 0;
}
- 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;
- 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++) {
- 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(ppages[i]);
- memcpy(destp, srcp+page_base, curlen);
- kunmap_atomic(srcp);
- rqst->rq_svec[0].iov_len += curlen;
- destp += curlen;
- copy_len -= curlen;
- page_base = 0;
+ /* The tail iovec is not always constructed in the same
+ * page where the head iovec resides (see, for example,
+ * gss_wrap_req_priv). To neatly accommodate that case,
+ * DMA map it separately.
+ */
+ if (xdr->tail[0].iov_len) {
+ page = virt_to_page(xdr->tail[0].iov_base);
+ page_base = (unsigned long)xdr->tail[0].iov_base & ~PAGE_MASK;
+ len = xdr->tail[0].iov_len;
+
+map_tail:
+ sge_no++;
+ sge[sge_no].addr = ib_dma_map_page(device, page,
+ page_base, len,
+ DMA_TO_DEVICE);
+ if (ib_dma_mapping_error(device, sge[sge_no].addr))
+ goto out_mapping_err;
+ sge[sge_no].length = len;
+ sge[sge_no].lkey = lkey;
+ req->rl_mapped_sges++;
}
- /* header now contains entire send message */
+
+out:
+ req->rl_send_wr.num_sge = sge_no + 1;
+ return true;
+
+out_mapping_overflow:
+ pr_err("rpcrdma: too many Send SGEs (%u)\n", sge_no);
+ return false;
+
+out_mapping_err:
+ pr_err("rpcrdma: Send mapping error\n");
+ return false;
+}
+
+bool
+rpcrdma_prepare_send_sges(struct rpcrdma_ia *ia, struct rpcrdma_req *req,
+ u32 hdrlen, struct xdr_buf *xdr,
+ enum rpcrdma_chunktype rtype)
+{
+ req->rl_send_wr.num_sge = 0;
+ req->rl_mapped_sges = 0;
+
+ if (!rpcrdma_prepare_hdr_sge(ia, req, hdrlen))
+ goto out_map;
+
+ if (rtype != rpcrdma_areadch)
+ if (!rpcrdma_prepare_msg_sges(ia, req, xdr, rtype))
+ goto out_map;
+
+ return true;
+
+out_map:
+ pr_err("rpcrdma: failed to DMA map a Send buffer\n");
+ return false;
+}
+
+void
+rpcrdma_unmap_sges(struct rpcrdma_ia *ia, struct rpcrdma_req *req)
+{
+ struct ib_device *device = ia->ri_device;
+ struct ib_sge *sge;
+ int count;
+
+ sge = &req->rl_send_sge[2];
+ for (count = req->rl_mapped_sges; count--; sge++)
+ ib_dma_unmap_page(device, sge->addr, sge->length,
+ DMA_TO_DEVICE);
+ req->rl_mapped_sges = 0;
}
/*
* Marshal a request: the primary job of this routine is to choose
* the transfer modes. See comments below.
*
- * Prepares up to two IOVs per Call message:
- *
- * [0] -- RPC RDMA header
- * [1] -- the RPC header/data
- *
* Returns zero on success, otherwise a negative errno.
*/
@@ -638,12 +704,11 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
*/
if (rpcrdma_args_inline(r_xprt, rqst)) {
rtype = rpcrdma_noch;
- rpcrdma_inline_pullup(rqst);
- rpclen = rqst->rq_svec[0].iov_len;
+ rpclen = rqst->rq_snd_buf.len;
} else if (ddp_allowed && rqst->rq_snd_buf.flags & XDRBUF_WRITE) {
rtype = rpcrdma_readch;
- rpclen = rqst->rq_svec[0].iov_len;
- rpclen += rpcrdma_tail_pullup(&rqst->rq_snd_buf);
+ rpclen = rqst->rq_snd_buf.head[0].iov_len +
+ rqst->rq_snd_buf.tail[0].iov_len;
} else {
r_xprt->rx_stats.nomsg_call_count++;
headerp->rm_type = htonl(RDMA_NOMSG);
@@ -685,47 +750,21 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
goto out_unmap;
hdrlen = (unsigned char *)iptr - (unsigned char *)headerp;
- if (hdrlen + rpclen > r_xprt->rx_data.inline_wsize)
- goto out_overflow;
-
dprintk("RPC: %5u %s: %s/%s: hdrlen %zd rpclen %zd\n",
rqst->rq_task->tk_pid, __func__,
transfertypes[rtype], transfertypes[wtype],
hdrlen, rpclen);
- if (!rpcrdma_dma_map_regbuf(&r_xprt->rx_ia, req->rl_rdmabuf))
- goto out_map;
- req->rl_send_iov[0].addr = rdmab_addr(req->rl_rdmabuf);
- req->rl_send_iov[0].length = hdrlen;
- req->rl_send_iov[0].lkey = rdmab_lkey(req->rl_rdmabuf);
-
- req->rl_send_wr.num_sge = 1;
- if (rtype == rpcrdma_areadch)
- return 0;
-
- if (!rpcrdma_dma_map_regbuf(&r_xprt->rx_ia, req->rl_sendbuf))
- goto out_map;
- req->rl_send_iov[1].addr = rdmab_addr(req->rl_sendbuf);
- req->rl_send_iov[1].length = rpclen;
- req->rl_send_iov[1].lkey = rdmab_lkey(req->rl_sendbuf);
-
- req->rl_send_wr.num_sge = 2;
-
+ if (!rpcrdma_prepare_send_sges(&r_xprt->rx_ia, req, hdrlen,
+ &rqst->rq_snd_buf, rtype)) {
+ iptr = ERR_PTR(-EIO);
+ goto out_unmap;
+ }
return 0;
-out_overflow:
- pr_err("rpcrdma: send overflow: hdrlen %zd rpclen %zu %s/%s\n",
- hdrlen, rpclen, transfertypes[rtype], transfertypes[wtype]);
- iptr = ERR_PTR(-EIO);
-
out_unmap:
r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req, false);
return PTR_ERR(iptr);
-
-out_map:
- pr_err("rpcrdma: failed to DMA map a Send buffer\n");
- iptr = ERR_PTR(-EIO);
- goto out_unmap;
}
/*
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 7e11d7191208..6a358ab6ce27 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -499,30 +499,21 @@ rpcrdma_get_rdmabuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
return true;
}
-/* RPC/RDMA marshaling may choose to send payload bearing ops inline,
- * if the resulting Call message is smaller than the inline threshold.
- * The value of the "rq_callsize" argument accounts for RPC header
- * requirements, but not for the data payload in these cases.
- *
- * See rpcrdma_inline_pullup.
- */
static bool
rpcrdma_get_sendbuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
size_t size, gfp_t flags)
{
struct rpcrdma_regbuf *rb;
- size_t min_size;
if (req->rl_sendbuf && rdmab_length(req->rl_sendbuf) >= size)
return true;
- min_size = max_t(size_t, size, r_xprt->rx_data.inline_wsize);
- rb = rpcrdma_alloc_regbuf(min_size, DMA_TO_DEVICE, flags);
+ rb = rpcrdma_alloc_regbuf(size, DMA_TO_DEVICE, flags);
if (IS_ERR(rb))
return false;
rpcrdma_free_regbuf(req->rl_sendbuf);
- r_xprt->rx_stats.hardway_register_count += min_size;
+ r_xprt->rx_stats.hardway_register_count += size;
req->rl_sendbuf = rb;
return true;
}
@@ -623,14 +614,15 @@ xprt_rdma_free(struct rpc_task *task)
struct rpc_rqst *rqst = task->tk_rqstp;
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
+ struct rpcrdma_ia *ia = &r_xprt->rx_ia;
if (req->rl_backchannel)
return;
dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply);
- r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req,
- !RPC_IS_ASYNC(task));
+ ia->ri_ops->ro_unmap_safe(r_xprt, req, !RPC_IS_ASYNC(task));
+ rpcrdma_unmap_sges(ia, req);
rpcrdma_buffer_put(req);
}
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index e2d639062450..eeaca9c83635 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -493,7 +493,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
unsigned int max_qp_wr;
int rc;
- if (ia->ri_device->attrs.max_sge < RPCRDMA_MAX_IOVS) {
+ if (ia->ri_device->attrs.max_sge < RPCRDMA_MAX_SEND_SGES) {
dprintk("RPC: %s: insufficient sge's available\n",
__func__);
return -ENOMEM;
@@ -522,7 +522,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
ep->rep_attr.cap.max_recv_wr = cdata->max_requests;
ep->rep_attr.cap.max_recv_wr += RPCRDMA_BACKWARD_WRS;
ep->rep_attr.cap.max_recv_wr += 1; /* drain cqe */
- ep->rep_attr.cap.max_send_sge = RPCRDMA_MAX_IOVS;
+ ep->rep_attr.cap.max_send_sge = RPCRDMA_MAX_SEND_SGES;
ep->rep_attr.cap.max_recv_sge = 1;
ep->rep_attr.cap.max_inline_data = 0;
ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
@@ -891,7 +891,7 @@ rpcrdma_create_req(struct rpcrdma_xprt *r_xprt)
INIT_LIST_HEAD(&req->rl_registered);
req->rl_send_wr.next = NULL;
req->rl_send_wr.wr_cqe = &req->rl_cqe;
- req->rl_send_wr.sg_list = req->rl_send_iov;
+ req->rl_send_wr.sg_list = req->rl_send_sge;
req->rl_send_wr.opcode = IB_WR_SEND;
return req;
}
@@ -1306,11 +1306,9 @@ rpcrdma_ep_post(struct rpcrdma_ia *ia,
struct rpcrdma_ep *ep,
struct rpcrdma_req *req)
{
- struct ib_device *device = ia->ri_device;
struct ib_send_wr *send_wr = &req->rl_send_wr;
struct ib_send_wr *send_wr_fail;
- struct ib_sge *sge = req->rl_send_iov;
- int i, rc;
+ int rc;
if (req->rl_reply) {
rc = rpcrdma_ep_post_recv(ia, req->rl_reply);
@@ -1319,9 +1317,6 @@ rpcrdma_ep_post(struct rpcrdma_ia *ia,
req->rl_reply = NULL;
}
- for (i = 0; i < send_wr->num_sge; i++)
- ib_dma_sync_single_for_device(device, sge[i].addr,
- sge[i].length, DMA_TO_DEVICE);
dprintk("RPC: %s: posting %d s/g entries\n",
__func__, send_wr->num_sge);
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 64b4e2257478..b2823d9b79ae 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -285,16 +285,27 @@ struct rpcrdma_mr_seg { /* chunk descriptors */
char *mr_offset; /* kva if no page, else offset */
};
-#define RPCRDMA_MAX_IOVS (2)
+/* Reserve enough Send SGEs to send a maximum size inline request:
+ * - RPC-over-RDMA header
+ * - xdr_buf head iovec
+ * - RPCRDMA_MAX_INLINE bytes, possibly unaligned, in pages
+ * - xdr_buf tail iovec
+ */
+enum {
+ RPCRDMA_MAX_SEND_PAGES = PAGE_SIZE + RPCRDMA_MAX_INLINE - 1,
+ RPCRDMA_MAX_PAGE_SGES = (RPCRDMA_MAX_SEND_PAGES >> PAGE_SHIFT) + 1,
+ RPCRDMA_MAX_SEND_SGES = 1 + 1 + RPCRDMA_MAX_PAGE_SGES + 1,
+};
struct rpcrdma_buffer;
struct rpcrdma_req {
struct list_head rl_free;
+ unsigned int rl_mapped_sges;
unsigned int rl_connect_cookie;
struct rpcrdma_buffer *rl_buffer;
struct rpcrdma_rep *rl_reply;
struct ib_send_wr rl_send_wr;
- struct ib_sge rl_send_iov[RPCRDMA_MAX_IOVS];
+ struct ib_sge rl_send_sge[RPCRDMA_MAX_SEND_SGES];
struct rpcrdma_regbuf *rl_rdmabuf; /* xprt header */
struct rpcrdma_regbuf *rl_sendbuf; /* rq_snd_buf */
struct rpcrdma_regbuf *rl_recvbuf; /* rq_rcv_buf */
@@ -529,6 +540,18 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *);
/*
* RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c
*/
+
+enum rpcrdma_chunktype {
+ rpcrdma_noch = 0,
+ rpcrdma_readch,
+ rpcrdma_areadch,
+ rpcrdma_writech,
+ rpcrdma_replych
+};
+
+bool rpcrdma_prepare_send_sges(struct rpcrdma_ia *, struct rpcrdma_req *,
+ u32, struct xdr_buf *, enum rpcrdma_chunktype);
+void rpcrdma_unmap_sges(struct rpcrdma_ia *, struct rpcrdma_req *);
int rpcrdma_marshal_req(struct rpc_rqst *);
void rpcrdma_set_max_header_sizes(struct rpcrdma_xprt *);
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