aboutsummaryrefslogtreecommitdiff
path: root/net/sunrpc/xprtrdma
diff options
context:
space:
mode:
Diffstat (limited to 'net/sunrpc/xprtrdma')
-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c33
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_recvfrom.c187
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_sendto.c255
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_transport.c364
-rw-r--r--net/sunrpc/xprtrdma/transport.c41
-rw-r--r--net/sunrpc/xprtrdma/verbs.c741
-rw-r--r--net/sunrpc/xprtrdma/xprt_rdma.h17
7 files changed, 1264 insertions, 374 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index e55427f73df..14106d26bb9 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -118,6 +118,10 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos,
}
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;
seg[n].mr_page = NULL;
@@ -508,8 +512,8 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
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);
@@ -594,7 +598,7 @@ 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;
@@ -660,6 +664,13 @@ 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",
@@ -681,12 +692,14 @@ rpcrdma_conn_func(struct rpcrdma_ep *ep)
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);
}
@@ -769,7 +782,7 @@ repost:
/* 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 +805,23 @@ 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 ||
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index 74de31a0661..a4756576d68 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -116,7 +116,7 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp,
*
* Assumptions:
* - chunk[0]->position points to pages[0] at an offset of 0
- * - pages[] is not physically or virtually contigous and consists of
+ * - pages[] is not physically or virtually contiguous and consists of
* PAGE_SIZE elements.
*
* Output:
@@ -125,7 +125,7 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp,
* chunk in the read list
*
*/
-static int rdma_rcl_to_sge(struct svcxprt_rdma *xprt,
+static int map_read_chunks(struct svcxprt_rdma *xprt,
struct svc_rqst *rqstp,
struct svc_rdma_op_ctxt *head,
struct rpcrdma_msg *rmsgp,
@@ -211,26 +211,128 @@ static int rdma_rcl_to_sge(struct svcxprt_rdma *xprt,
return sge_no;
}
-static void rdma_set_ctxt_sge(struct svcxprt_rdma *xprt,
- struct svc_rdma_op_ctxt *ctxt,
- struct kvec *vec,
- u64 *sgl_offset,
- int count)
+/* Map a read-chunk-list to an XDR and fast register the page-list.
+ *
+ * Assumptions:
+ * - chunk[0] position points to pages[0] at an offset of 0
+ * - pages[] will be made physically contiguous by creating a one-off memory
+ * region using the fastreg verb.
+ * - byte_count is # of bytes in read-chunk-list
+ * - ch_count is # of chunks in read-chunk-list
+ *
+ * Output:
+ * - sge array pointing into pages[] array.
+ * - chunk_sge array specifying sge index and count for each
+ * chunk in the read list
+ */
+static int fast_reg_read_chunks(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)
+{
+ int page_no;
+ int ch_no;
+ u32 offset;
+ struct rpcrdma_read_chunk *ch;
+ struct svc_rdma_fastreg_mr *frmr;
+ int ret = 0;
+
+ frmr = svc_rdma_get_frmr(xprt);
+ if (IS_ERR(frmr))
+ return -ENOMEM;
+
+ head->frmr = frmr;
+ 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 = byte_count;
+ head->arg.len = rqstp->rq_arg.len + byte_count;
+ head->arg.buflen = rqstp->rq_arg.buflen + byte_count;
+
+ /* Fast register the page list */
+ frmr->kva = page_address(rqstp->rq_arg.pages[0]);
+ frmr->direction = DMA_FROM_DEVICE;
+ frmr->access_flags = (IB_ACCESS_LOCAL_WRITE|IB_ACCESS_REMOTE_WRITE);
+ frmr->map_len = byte_count;
+ frmr->page_list_len = PAGE_ALIGN(byte_count) >> PAGE_SHIFT;
+ for (page_no = 0; page_no < frmr->page_list_len; page_no++) {
+ frmr->page_list->page_list[page_no] =
+ ib_dma_map_single(xprt->sc_cm_id->device,
+ page_address(rqstp->rq_arg.pages[page_no]),
+ PAGE_SIZE, DMA_TO_DEVICE);
+ if (ib_dma_mapping_error(xprt->sc_cm_id->device,
+ frmr->page_list->page_list[page_no]))
+ goto fatal_err;
+ atomic_inc(&xprt->sc_dma_used);
+ head->arg.pages[page_no] = rqstp->rq_arg.pages[page_no];
+ }
+ head->count += page_no;
+
+ /* rq_respages points one past arg pages */
+ rqstp->rq_respages = &rqstp->rq_arg.pages[page_no];
+
+ /* Create the reply and chunk maps */
+ offset = 0;
+ ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0];
+ for (ch_no = 0; ch_no < ch_count; ch_no++) {
+ rpl_map->sge[ch_no].iov_base = frmr->kva + offset;
+ rpl_map->sge[ch_no].iov_len = ch->rc_target.rs_length;
+ chl_map->ch[ch_no].count = 1;
+ chl_map->ch[ch_no].start = ch_no;
+ offset += ch->rc_target.rs_length;
+ ch++;
+ }
+
+ ret = svc_rdma_fastreg(xprt, frmr);
+ if (ret)
+ goto fatal_err;
+
+ return ch_no;
+
+ fatal_err:
+ printk("svcrdma: error fast registering xdr for xprt %p", xprt);
+ svc_rdma_put_frmr(xprt, frmr);
+ return -EIO;
+}
+
+static int rdma_set_ctxt_sge(struct svcxprt_rdma *xprt,
+ struct svc_rdma_op_ctxt *ctxt,
+ struct svc_rdma_fastreg_mr *frmr,
+ struct kvec *vec,
+ u64 *sgl_offset,
+ int count)
{
int i;
ctxt->count = count;
ctxt->direction = DMA_FROM_DEVICE;
for (i = 0; i < count; i++) {
- 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 = 0; /* in case map fails */
+ if (!frmr) {
+ ctxt->sge[i].addr =
+ ib_dma_map_single(xprt->sc_cm_id->device,
+ vec[i].iov_base,
+ vec[i].iov_len,
+ DMA_FROM_DEVICE);
+ if (ib_dma_mapping_error(xprt->sc_cm_id->device,
+ ctxt->sge[i].addr))
+ return -EINVAL;
+ ctxt->sge[i].lkey = xprt->sc_dma_lkey;
+ atomic_inc(&xprt->sc_dma_used);
+ } else {
+ ctxt->sge[i].addr = (unsigned long)vec[i].iov_base;
+ ctxt->sge[i].lkey = frmr->mr->lkey;
+ }
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;
}
+ return 0;
}
static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count)
@@ -278,6 +380,7 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt,
struct svc_rdma_op_ctxt *hdr_ctxt)
{
struct ib_send_wr read_wr;
+ struct ib_send_wr inv_wr;
int err = 0;
int ch_no;
int ch_count;
@@ -301,9 +404,20 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt,
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);
+
+ if (!xprt->sc_frmr_pg_list_len)
+ sge_count = map_read_chunks(xprt, rqstp, hdr_ctxt, rmsgp,
+ rpl_map, chl_map, ch_count,
+ byte_count);
+ else
+ sge_count = fast_reg_read_chunks(xprt, rqstp, hdr_ctxt, rmsgp,
+ rpl_map, chl_map, ch_count,
+ byte_count);
+ if (sge_count < 0) {
+ err = -EIO;
+ goto out;
+ }
+
sgl_offset = 0;
ch_no = 0;
@@ -312,13 +426,16 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt,
next_sge:
ctxt = svc_rdma_get_context(xprt);
ctxt->direction = DMA_FROM_DEVICE;
+ ctxt->frmr = hdr_ctxt->frmr;
+ ctxt->read_hdr = NULL;
clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags);
+ clear_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags);
/* 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;
+ ctxt->wr_op = read_wr.opcode;
read_wr.send_flags = IB_SEND_SIGNALED;
read_wr.wr.rdma.rkey = ch->rc_target.rs_handle;
read_wr.wr.rdma.remote_addr =
@@ -327,10 +444,15 @@ next_sge:
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);
+ err = rdma_set_ctxt_sge(xprt, ctxt, hdr_ctxt->frmr,
+ &rpl_map->sge[chl_map->ch[ch_no].start],
+ &sgl_offset,
+ read_wr.num_sge);
+ if (err) {
+ svc_rdma_unmap_dma(ctxt);
+ svc_rdma_put_context(ctxt, 0);
+ goto out;
+ }
if (((ch+1)->rc_discrim == 0) &&
(read_wr.num_sge == chl_map->ch[ch_no].count)) {
/*
@@ -339,6 +461,29 @@ next_sge:
* the client and the RPC needs to be enqueued.
*/
set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags);
+ if (hdr_ctxt->frmr) {
+ set_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags);
+ /*
+ * Invalidate the local MR used to map the data
+ * sink.
+ */
+ if (xprt->sc_dev_caps &
+ SVCRDMA_DEVCAP_READ_W_INV) {
+ read_wr.opcode =
+ IB_WR_RDMA_READ_WITH_INV;
+ ctxt->wr_op = read_wr.opcode;
+ read_wr.ex.invalidate_rkey =
+ ctxt->frmr->mr->lkey;
+ } else {
+ /* Prepare INVALIDATE WR */
+ memset(&inv_wr, 0, sizeof inv_wr);
+ inv_wr.opcode = IB_WR_LOCAL_INV;
+ inv_wr.send_flags = IB_SEND_SIGNALED;
+ inv_wr.ex.invalidate_rkey =
+ hdr_ctxt->frmr->mr->lkey;
+ read_wr.next = &inv_wr;
+ }
+ }
ctxt->read_hdr = hdr_ctxt;
}
/* Post the read */
diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
index 84d328329d9..9a7a8e7ae03 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -69,9 +69,127 @@
* 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)
+int fast_reg_xdr(struct svcxprt_rdma *xprt,
+ struct xdr_buf *xdr,
+ struct svc_rdma_req_map *vec)
+{
+ int sge_no;
+ u32 sge_bytes;
+ u32 page_bytes;
+ u32 page_off;
+ int page_no = 0;
+ u8 *frva;
+ struct svc_rdma_fastreg_mr *frmr;
+
+ frmr = svc_rdma_get_frmr(xprt);
+ if (IS_ERR(frmr))
+ return -ENOMEM;
+ vec->frmr = frmr;
+
+ /* Skip the RPCRDMA header */
+ sge_no = 1;
+
+ /* Map the head. */
+ frva = (void *)((unsigned long)(xdr->head[0].iov_base) & PAGE_MASK);
+ vec->sge[sge_no].iov_base = xdr->head[0].iov_base;
+ vec->sge[sge_no].iov_len = xdr->head[0].iov_len;
+ vec->count = 2;
+ sge_no++;
+
+ /* Build the FRMR */
+ frmr->kva = frva;
+ frmr->direction = DMA_TO_DEVICE;
+ frmr->access_flags = 0;
+ frmr->map_len = PAGE_SIZE;
+ frmr->page_list_len = 1;
+ frmr->page_list->page_list[page_no] =
+ ib_dma_map_single(xprt->sc_cm_id->device,
+ (void *)xdr->head[0].iov_base,
+ PAGE_SIZE, DMA_TO_DEVICE);
+ if (ib_dma_mapping_error(xprt->sc_cm_id->device,
+ frmr->page_list->page_list[page_no]))
+ goto fatal_err;
+ atomic_inc(&xprt->sc_dma_used);
+
+ page_off = xdr->page_base;
+ page_bytes = xdr->page_len + page_off;
+ if (!page_bytes)
+ goto encode_tail;
+
+ /* Map the pages */
+ vec->sge[sge_no].iov_base = frva + frmr->map_len + page_off;
+ vec->sge[sge_no].iov_len = page_bytes;
+ sge_no++;
+ while (page_bytes) {
+ struct page *page;
+
+ page = xdr->pages[page_no++];
+ sge_bytes = min_t(u32, page_bytes, (PAGE_SIZE - page_off));
+ page_bytes -= sge_bytes;
+
+ frmr->page_list->page_list[page_no] =
+ ib_dma_map_page(xprt->sc_cm_id->device, page, 0,
+ PAGE_SIZE, DMA_TO_DEVICE);
+ if (ib_dma_mapping_error(xprt->sc_cm_id->device,
+ frmr->page_list->page_list[page_no]))
+ goto fatal_err;
+
+ atomic_inc(&xprt->sc_dma_used);
+ page_off = 0; /* reset for next time through loop */
+ frmr->map_len += PAGE_SIZE;
+ frmr->page_list_len++;
+ }
+ vec->count++;
+
+ encode_tail:
+ /* Map tail */
+ if (0 == xdr->tail[0].iov_len)
+ goto done;
+
+ vec->count++;
+ vec->sge[sge_no].iov_len = xdr->tail[0].iov_len;
+
+ if (((unsigned long)xdr->tail[0].iov_base & PAGE_MASK) ==
+ ((unsigned long)xdr->head[0].iov_base & PAGE_MASK)) {
+ /*
+ * If head and tail use the same page, we don't need
+ * to map it again.
+ */
+ vec->sge[sge_no].iov_base = xdr->tail[0].iov_base;
+ } else {
+ void *va;
+
+ /* Map another page for the tail */
+ page_off = (unsigned long)xdr->tail[0].iov_base & ~PAGE_MASK;
+ va = (void *)((unsigned long)xdr->tail[0].iov_base & PAGE_MASK);
+ vec->sge[sge_no].iov_base = frva + frmr->map_len + page_off;
+
+ frmr->page_list->page_list[page_no] =
+ ib_dma_map_single(xprt->sc_cm_id->device, va, PAGE_SIZE,
+ DMA_TO_DEVICE);
+ if (ib_dma_mapping_error(xprt->sc_cm_id->device,
+ frmr->page_list->page_list[page_no]))
+ goto fatal_err;
+ atomic_inc(&xprt->sc_dma_used);
+ frmr->map_len += PAGE_SIZE;
+ frmr->page_list_len++;
+ }
+
+ done:
+ if (svc_rdma_fastreg(xprt, frmr))
+ goto fatal_err;
+
+ return 0;
+
+ fatal_err:
+ printk("svcrdma: Error fast registering memory for xprt %p\n", xprt);
+ svc_rdma_put_frmr(xprt, frmr);
+ return -EIO;
+}
+
+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;
@@ -83,6 +201,9 @@ static void xdr_to_sge(struct svcxprt_rdma *xprt,
BUG_ON(xdr->len !=
(xdr->head[0].iov_len + xdr->page_len + xdr->tail[0].iov_len));
+ if (xprt->sc_frmr_pg_list_len)
+ return fast_reg_xdr(xprt, xdr, vec);
+
/* Skip the first sge, this is for the RPCRDMA header */
sge_no = 1;
@@ -116,9 +237,12 @@ static void xdr_to_sge(struct svcxprt_rdma *xprt,
BUG_ON(sge_no > sge_max);
vec->count = sge_no;
+ return 0;
}
/* Assumptions:
+ * - We are using FRMR
+ * - or -
* - The specified write_len can be represented in sc_max_sge * PAGE_SIZE
*/
static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp,
@@ -158,30 +282,35 @@ 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))
- goto err;
+ if (!vec->frmr) {
+ 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 (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;
+ } else {
+ sge[sge_no].addr = (unsigned long)
+ vec->sge[xdr_sge_no].iov_base + sge_off;
+ sge[sge_no].lkey = vec->frmr->mr->lkey;
+ }
+ ctxt->count++;
+ ctxt->frmr = vec->frmr;
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;
@@ -226,7 +355,10 @@ static int send_write_chunks(struct svcxprt_rdma *xprt,
res_ary = (struct rpcrdma_write_array *)
&rdma_resp->rm_body.rm_chunks[1];
- max_write = xprt->sc_max_sge * PAGE_SIZE;
+ if (vec->frmr)
+ max_write = vec->frmr->map_len;
+ else
+ max_write = xprt->sc_max_sge * PAGE_SIZE;
/* Write chunks start at the pagelist */
for (xdr_off = rqstp->rq_res.head[0].iov_len, chunk_no = 0;
@@ -297,7 +429,10 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt,
res_ary = (struct rpcrdma_write_array *)
&rdma_resp->rm_body.rm_chunks[2];
- max_write = xprt->sc_max_sge * PAGE_SIZE;
+ if (vec->frmr)
+ max_write = vec->frmr->map_len;
+ else
+ max_write = xprt->sc_max_sge * PAGE_SIZE;
/* xdr offset starts at RPC message */
for (xdr_off = 0, chunk_no = 0;
@@ -307,7 +442,6 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt,
ch = &arg_ary->wc_array[chunk_no].wc_target;
write_len = min(xfer_len, ch->rs_length);
-
/* Prepare the reply chunk given the length actually
* written */
rs_offset = get_unaligned(&(ch->rs_offset));
@@ -366,6 +500,7 @@ static int send_reply(struct svcxprt_rdma *rdma,
int byte_count)
{
struct ib_send_wr send_wr;
+ struct ib_send_wr inv_wr;
int sge_no;
int sge_bytes;
int page_no;
@@ -385,27 +520,45 @@ static int send_reply(struct svcxprt_rdma *rdma,
/* Prepare the context */
ctxt->pages[0] = page;
ctxt->count = 1;
+ ctxt->frmr = vec->frmr;
+ if (vec->frmr)
+ set_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags);
+ else
+ clear_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags);
/* Prepare the SGE for the RPCRDMA Header */
- atomic_inc(&rdma->sc_dma_used);
ctxt->sge[0].addr =
ib_dma_map_page(rdma->sc_cm_id->device,
page, 0, PAGE_SIZE, 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;
+ ctxt->sge[0].lkey = rdma->sc_dma_lkey;
/* Determine how many of our SGE are to be transmitted */
for (sge_no = 1; byte_count && sge_no < vec->count; sge_no++) {
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);
+ if (!vec->frmr) {
+ 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);
+ 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;
+ } else {
+ ctxt->sge[sge_no].addr = (unsigned long)
+ vec->sge[sge_no].iov_base;
+ ctxt->sge[sge_no].lkey = vec->frmr->mr->lkey;
+ }
ctxt->sge[sge_no].length = sge_bytes;
- ctxt->sge[sge_no].lkey = rdma->sc_phys_mr->lkey;
}
BUG_ON(byte_count != 0);
@@ -417,11 +570,16 @@ static int send_reply(struct svcxprt_rdma *rdma,
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;
}
BUG_ON(sge_no > rdma->sc_max_sge);
+ BUG_ON(sge_no > ctxt->count);
memset(&send_wr, 0, sizeof send_wr);
ctxt->wr_op = IB_WR_SEND;
send_wr.wr_id = (unsigned long)ctxt;
@@ -429,12 +587,26 @@ static int send_reply(struct svcxprt_rdma *rdma,
send_wr.num_sge = sge_no;
send_wr.opcode = IB_WR_SEND;
send_wr.send_flags = IB_SEND_SIGNALED;
+ if (vec->frmr) {
+ /* Prepare INVALIDATE WR */
+ memset(&inv_wr, 0, sizeof inv_wr);
+ inv_wr.opcode = IB_WR_LOCAL_INV;
+ inv_wr.send_flags = IB_SEND_SIGNALED;
+ inv_wr.ex.invalidate_rkey =
+ vec->frmr->mr->lkey;
+ send_wr.next = &inv_wr;
+ }
ret = svc_rdma_send(rdma, &send_wr);
if (ret)
- svc_rdma_put_context(ctxt, 1);
+ goto err;
- return ret;
+ return 0;
+
+ err:
+ svc_rdma_put_frmr(rdma, vec->frmr);
+ svc_rdma_put_context(ctxt, 1);
+ return -EIO;
}
void svc_rdma_prep_reply_hdr(struct svc_rqst *rqstp)
@@ -477,8 +649,9 @@ 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 +671,7 @@ 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 +681,7 @@ 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 +690,11 @@ 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 900cb69728c..6fb493cbd29 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -100,20 +100,29 @@ 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_single(xprt->sc_cm_id->device,
+ ctxt->sge[i].addr,
+ ctxt->sge[i].length,
+ ctxt->direction);
+ }
}
}
@@ -150,6 +159,7 @@ struct svc_rdma_req_map *svc_rdma_get_req_map(void)
schedule_timeout_uninterruptible(msecs_to_jiffies(500));
}
map->count = 0;
+ map->frmr = NULL;
return map;
}
@@ -316,6 +326,50 @@ static void rq_cq_reap(struct svcxprt_rdma *xprt)
}
/*
+ * Processs 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:
+ if (test_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags))
+ svc_rdma_put_frmr(xprt, ctxt->frmr);
+ svc_rdma_put_context(ctxt, 1);
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ svc_rdma_put_context(ctxt, 0);
+ break;
+
+ case IB_WR_RDMA_READ:
+ case IB_WR_RDMA_READ_WITH_INV:
+ if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) {
+ struct svc_rdma_op_ctxt *read_hdr = ctxt->read_hdr;
+ BUG_ON(!read_hdr);
+ if (test_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags))
+ svc_rdma_put_frmr(xprt, ctxt->frmr);
+ 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:
+ 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.
@@ -327,17 +381,12 @@ static void sq_cq_reap(struct svcxprt_rdma *xprt)
struct ib_cq *cq = xprt->sc_sq_cq;
int ret;
-
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);
@@ -346,35 +395,10 @@ static void sq_cq_reap(struct svcxprt_rdma *xprt)
atomic_dec(&xprt->sc_sq_count);
wake_up(&xprt->sc_send_wait);
- switch (ctxt->wr_op) {
- case IB_WR_SEND:
- svc_rdma_put_context(ctxt, 1);
- break;
-
- case IB_WR_RDMA_WRITE:
- svc_rdma_put_context(ctxt, 0);
- break;
-
- 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);
- 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;
+ 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);
}
@@ -425,10 +449,12 @@ static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv,
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_rq_dto_lock);
+ spin_lock_init(&cma_xprt->sc_frmr_q_lock);
cma_xprt->sc_ord = svcrdma_ord;
@@ -462,7 +488,7 @@ 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;
@@ -474,13 +500,15 @@ 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;
buflen += PAGE_SIZE;
}
ctxt->count = sge_no;
@@ -496,6 +524,10 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt)
svc_rdma_put_context(ctxt, 1);
}
return ret;
+
+ err_put_ctxt:
+ svc_rdma_put_context(ctxt, 1);
+ return -ENOMEM;
}
/*
@@ -566,7 +598,7 @@ 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:
@@ -686,6 +718,97 @@ 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 (!mr)
+ goto err_free_frmr;
+
+ pl = ib_alloc_fast_reg_page_list(xprt->sc_cm_id->device,
+ RPCSVC_MAXPAGES);
+ if (!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_single(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
@@ -704,6 +827,8 @@ 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 dma_mr_acc;
+ int need_dma_mr;
int ret;
int i;
@@ -819,15 +944,77 @@ 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 (!(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);
@@ -961,6 +1148,9 @@ 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);
@@ -1014,21 +1204,59 @@ static int svc_rdma_has_wspace(struct svc_xprt *xprt)
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);
@@ -1043,19 +1271,26 @@ int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr)
return 0;
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;
@@ -1079,10 +1314,14 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
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;
+ if (ib_dma_mapping_error(xprt->sc_cm_id->device, sge.addr)) {
+ put_page(p);
+ return;
+ }
+ atomic_inc(&xprt->sc_dma_used);
+ sge.lkey = xprt->sc_dma_lkey;
sge.length = length;
ctxt = svc_rdma_get_context(xprt);
@@ -1103,6 +1342,9 @@ 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);
+ ib_dma_unmap_page(xprt->sc_cm_id->device,
+ sge.addr, PAGE_SIZE,
+ DMA_FROM_DEVICE);
svc_rdma_put_context(ctxt, 1);
}
}
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index a564c1a39ec..9839c3d9414 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -70,11 +70,8 @@ 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
@@ -140,6 +137,14 @@ static ctl_table xr_tunables_table[] = {
.extra2 = &max_memreg,
},
{
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "rdma_pad_optimize",
+ .data = &xprt_rdma_pad_optimize,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
.ctl_name = 0,
},
};
@@ -458,6 +463,8 @@ 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);
}
@@ -485,6 +492,11 @@ xprt_rdma_connect(struct rpc_task *task)
/* Reconnect */
schedule_delayed_work(&r_xprt->rdma_connect,
xprt->reestablish_timeout);
+ xprt->reestablish_timeout <<= 1;
+ if (xprt->reestablish_timeout > (30 * HZ))
+ xprt->reestablish_timeout = (30 * HZ);
+ else if (xprt->reestablish_timeout < (5 * HZ))
+ xprt->reestablish_timeout = (5 * HZ);
} else {
schedule_delayed_work(&r_xprt->rdma_connect, 0);
if (!RPC_IS_ASYNC(task))
@@ -591,6 +603,7 @@ xprt_rdma_allocate(struct rpc_task *task, size_t size)
}
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:
@@ -694,13 +707,21 @@ 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;
+ task->tk_bytes_sent += rqst->rq_snd_buf.len;
rqst->rq_bytes_sent = 0;
return 0;
+
+drop_connection:
+ xprt_disconnect_done(xprt);
+ return -ENOTCONN; /* implies disconnect */
}
static void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
@@ -770,7 +791,7 @@ static void __exit xprt_rdma_cleanup(void)
{
int rc;
- dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n");
+ dprintk(KERN_INFO "RPCRDMA Module Removed, deregister RPC RDMA transport\n");
#ifdef RPC_DEBUG
if (sunrpc_table_header) {
unregister_sysctl_table(sunrpc_table_header);
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 8ea283ecc52..a5fef5e6c32 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -284,6 +284,7 @@ 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:
@@ -338,13 +339,32 @@ 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 %u.%u.%u.%u:%u "
+ "on %s, memreg %d slots %d ird %d%s\n",
+ NIPQUAD(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 %u.%u.%u.%u:%u "
+ "closed (%d)\n",
+ NIPQUAD(addr->sin_addr.s_addr),
+ ntohs(addr->sin_port),
+ connstate);
+ }
+#endif
+
return 0;
}
@@ -355,6 +375,8 @@ rpcrdma_create_id(struct rpcrdma_xprt *xprt,
struct rdma_cm_id *id;
int rc;
+ init_completion(&ia->ri_done);
+
id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP);
if (IS_ERR(id)) {
rc = PTR_ERR(id);
@@ -363,26 +385,28 @@ 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 +447,10 @@ 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 +466,73 @@ 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;
+ }
+
+ switch (memreg) {
+ case RPCRDMA_MEMWINDOWS:
+ case RPCRDMA_MEMWINDOWS_ASYNC:
+ if (!(devattr.device_cap_flags & IB_DEVICE_MEM_WINDOW)) {
+ dprintk("RPC: %s: MEMWINDOWS registration "
+ "specified but not supported by adapter, "
+ "using slower RPCRDMA_REGISTER\n",
+ __func__);
+ memreg = RPCRDMA_REGISTER;
+ }
+ break;
+ case RPCRDMA_MTHCAFMR:
+ if (!ia->ri_id->device->alloc_fmr) {
+#if RPCRDMA_PERSISTENT_REGISTRATION
+ dprintk("RPC: %s: MTHCAFMR registration "
+ "specified but not supported by adapter, "
+ "using riskier RPCRDMA_ALLPHYSICAL\n",
+ __func__);
+ memreg = RPCRDMA_ALLPHYSICAL;
+#else
+ dprintk("RPC: %s: MTHCAFMR registration "
+ "specified but not supported by adapter, "
+ "using slower RPCRDMA_REGISTER\n",
+ __func__);
+ memreg = RPCRDMA_REGISTER;
+#endif
+ }
+ break;
+ case 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)) {
+#if RPCRDMA_PERSISTENT_REGISTRATION
+ dprintk("RPC: %s: FRMR registration "
+ "specified but not supported by adapter, "
+ "using riskier RPCRDMA_ALLPHYSICAL\n",
+ __func__);
+ memreg = RPCRDMA_ALLPHYSICAL;
+#else
+ dprintk("RPC: %s: FRMR registration "
+ "specified but not supported by adapter, "
+ "using slower RPCRDMA_REGISTER\n",
+ __func__);
+ memreg = RPCRDMA_REGISTER;
+#endif
+ }
+ break;
+ }
+
+ /*
* 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
@@ -450,22 +540,28 @@ 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_BOUNCEBUFFERS:
+ case RPCRDMA_REGISTER:
+ 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_MEMWINDOWS_ASYNC:
+ case RPCRDMA_MEMWINDOWS:
+ mem_priv = IB_ACCESS_LOCAL_WRITE |
+ IB_ACCESS_MW_BIND;
+ goto register_setup;
+ case RPCRDMA_MTHCAFMR:
+ if (ia->ri_have_dma_lkey)
break;
- }
+ mem_priv = IB_ACCESS_LOCAL_WRITE;
+ register_setup:
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 "
@@ -475,7 +571,15 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg)
memreg = RPCRDMA_REGISTER;
ia->ri_bind_mem = NULL;
}
+ break;
+ default:
+ printk(KERN_ERR "%s: invalid memory registration mode %d\n",
+ __func__, memreg);
+ rc = -EINVAL;
+ 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 +587,7 @@ 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 +608,17 @@ 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);
}
/*
@@ -541,6 +648,12 @@ 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_FRMR:
+ /* Add room for frmr register and invalidate WRs */
+ ep->rep_attr.cap.max_send_wr *= 3;
+ if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr)
+ return -EINVAL;
+ break;
case RPCRDMA_MEMWINDOWS_ASYNC:
case RPCRDMA_MEMWINDOWS:
/* Add room for mw_binds+unbinds - overkill! */
@@ -617,29 +730,13 @@ 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.initiator_depth = 0;
+ if (ia->ri_memreg_strategy == 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)
+ else 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.initiator_depth = 0;
ep->rep_remote_cma.retry_count = 7;
ep->rep_remote_cma.flow_control = 0;
@@ -679,21 +776,16 @@ rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *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);
if (rc)
@@ -712,9 +804,8 @@ 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:
rc = rpcrdma_ep_disconnect(ep, ia);
@@ -745,6 +836,7 @@ retry:
goto out;
}
/* END TEMP */
+ rdma_destroy_qp(ia->ri_id);
rdma_destroy_id(ia->ri_id);
ia->ri_id = id;
}
@@ -769,14 +861,6 @@ if (strnicmp(ia->ri_id->device->dma_device->bus->name, "pci", 3) == 0) {
}
}
- /* 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 +870,6 @@ 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);
/*
@@ -805,14 +886,16 @@ if (strnicmp(ia->ri_id->device->dma_device->bus->name, "pci", 3) == 0) {
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__);
@@ -863,6 +946,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
char *p;
size_t len;
int i, rc;
+ struct rpcrdma_mw *r;
buf->rb_max_requests = cdata->max_requests;
spin_lock_init(&buf->rb_lock);
@@ -873,7 +957,7 @@ 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
*/
@@ -881,6 +965,10 @@ 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_FRMR:
+ len += buf->rb_max_requests * RPCRDMA_MAX_SEGS *
+ sizeof(struct rpcrdma_mw);
+ break;
case RPCRDMA_MTHCAFMR:
/* TBD we are perhaps overallocating here */
len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS *
@@ -927,15 +1015,37 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
* 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,
+ RPCRDMA_MAX_SEGS);
+ 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,
+ RPCRDMA_MAX_SEGS);
+ 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);
+ 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);
@@ -948,12 +1058,9 @@ 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);
@@ -966,7 +1073,6 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
list_add(&r->mw_list, &buf->rb_mws);
++r;
}
- }
break;
default:
break;
@@ -1046,6 +1152,7 @@ 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)
@@ -1065,11 +1172,19 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
}
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_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)
@@ -1115,6 +1230,8 @@ 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 +1252,8 @@ 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);
@@ -1171,6 +1287,7 @@ rpcrdma_buffer_put(struct rpcrdma_req *req)
req->rl_reply = NULL;
}
switch (ia->ri_memreg_strategy) {
+ case RPCRDMA_FRMR:
case RPCRDMA_MTHCAFMR:
case RPCRDMA_MEMWINDOWS_ASYNC:
case RPCRDMA_MEMWINDOWS:
@@ -1252,7 +1369,11 @@ 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;
@@ -1329,15 +1450,292 @@ 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 frmr_wr, *bad_wr;
+ u8 key;
+ int len, pageoff;
+ int 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);
+ seg1->mr_chunk.rl_mw->r.frmr.fr_pgl->page_list[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;
+ }
+ dprintk("RPC: %s: Using frmr %p to map %d segments\n",
+ __func__, seg1->mr_chunk.rl_mw, i);
+
+ /* 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);
+
+ /* Prepare FRMR WR */
+ memset(&frmr_wr, 0, sizeof frmr_wr);
+ frmr_wr.opcode = IB_WR_FAST_REG_MR;
+ frmr_wr.send_flags = 0; /* unsignaled */
+ frmr_wr.wr.fast_reg.iova_start = (unsigned long)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 = i;
+ frmr_wr.wr.fast_reg.page_shift = PAGE_SHIFT;
+ frmr_wr.wr.fast_reg.length = i << PAGE_SHIFT;
+ frmr_wr.wr.fast_reg.access_flags = (writing ?
+ IB_ACCESS_REMOTE_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, &frmr_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.opcode = IB_WR_LOCAL_INV;
+ invalidate_wr.send_flags = 0; /* unsignaled */
+ 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;
+}
+
+static int
+rpcrdma_register_memwin_external(struct rpcrdma_mr_seg *seg,
+ int *nsegs, int writing, struct rpcrdma_ia *ia,
+ struct rpcrdma_xprt *r_xprt)
+{
+ int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE :
+ IB_ACCESS_REMOTE_READ);
+ struct ib_mw_bind param;
+ int rc;
+
+ *nsegs = 1;
+ 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, &param);
+ 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;
+ }
+ return rc;
+}
+
+static int
+rpcrdma_deregister_memwin_external(struct rpcrdma_mr_seg *seg,
+ struct rpcrdma_ia *ia,
+ struct rpcrdma_xprt *r_xprt, void **r)
+{
+ struct ib_mw_bind param;
+ LIST_HEAD(l);
+ int rc;
+
+ BUG_ON(seg->mr_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, &param);
+ 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 */
+ return rc;
+}
+
+static int
+rpcrdma_register_default_external(struct rpcrdma_mr_seg *seg,
+ int *nsegs, int writing, struct rpcrdma_ia *ia)
+{
+ int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE :
+ IB_ACCESS_REMOTE_READ);
+ struct rpcrdma_mr_seg *seg1 = seg;
+ struct ib_phys_buf ipb[RPCRDMA_MAX_DATA_SEGS];
+ int len, i, rc = 0;
+
+ if (*nsegs > RPCRDMA_MAX_DATA_SEGS)
+ *nsegs = RPCRDMA_MAX_DATA_SEGS;
+ for (len = 0, 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;
+ }
+ seg1->mr_base = seg1->mr_dma;
+ seg1->mr_chunk.rl_mr = ib_reg_phys_mr(ia->ri_pd,
+ ipb, i, 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, i, rc);
+ while (i--)
+ rpcrdma_unmap_one(ia, --seg);
+ } else {
+ seg1->mr_rkey = seg1->mr_chunk.rl_mr->rkey;
+ seg1->mr_nsegs = i;
+ seg1->mr_len = len;
+ }
+ *nsegs = i;
+ return rc;
+}
+
+static int
+rpcrdma_deregister_default_external(struct rpcrdma_mr_seg *seg,
+ struct rpcrdma_ia *ia)
+{
+ struct rpcrdma_mr_seg *seg1 = seg;
+ int rc;
+
+ 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);
+ 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) {
@@ -1352,114 +1750,25 @@ rpcrdma_register_external(struct rpcrdma_mr_seg *seg,
break;
#endif
- /* Registration using fast memory registration */
+ /* Registration using frmr registration */
+ case RPCRDMA_FRMR:
+ rc = rpcrdma_register_frmr_external(seg, &nsegs, writing, ia, r_xprt);
+ break;
+
+ /* Registration using fmr 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;
- }
- }
+ rc = rpcrdma_register_fmr_external(seg, &nsegs, writing, ia);
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, &param);
- 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;
- }
- }
+ rc = rpcrdma_register_memwin_external(seg, &nsegs, writing, ia, r_xprt);
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;
- }
- }
+ rc = rpcrdma_register_default_external(seg, &nsegs, writing, ia);
break;
}
if (rc)
@@ -1473,7 +1782,6 @@ rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg,
struct rpcrdma_xprt *r_xprt, void *r)
{
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) {
@@ -1486,56 +1794,21 @@ rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg,
break;
#endif
+ case RPCRDMA_FRMR:
+ rc = rpcrdma_deregister_frmr_external(seg, ia, r_xprt);
+ break;
+
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);
+ rc = rpcrdma_deregister_fmr_external(seg, ia);
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, &param);
- 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 */
+ rc = rpcrdma_deregister_memwin_external(seg, ia, r_xprt, &r);
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);
+ rc = rpcrdma_deregister_default_external(seg, ia);
break;
}
if (r) {
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 2427822f8bd..c7a7eba991b 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -51,6 +51,9 @@
#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
*/
@@ -58,6 +61,8 @@ 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;
@@ -156,6 +161,10 @@ struct rpcrdma_mr_seg { /* chunk descriptors */
union {
struct ib_mw *mw;
struct ib_fmr *fmr;
+ struct {
+ struct ib_fast_reg_page_list *fr_pgl;
+ struct ib_mr *fr_mr;
+ } frmr;
} r;
struct list_head mw_list;
} *rl_mw;
@@ -175,6 +184,7 @@ 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 */
@@ -198,7 +208,7 @@ struct rpcrdma_buffer {
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;
@@ -273,6 +283,11 @@ 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
*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-11 00:00:02 +0000