xprtrdma: Add "init MRs" memreg op

This method is used when setting up a new transport instance to
create a pool of Memory Region objects that will be used to register
memory during operation.

Memory Regions are not needed for "physical" registration, since
->prepare and ->release are no-ops for that mode.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Tested-by: Devesh Sharma <Devesh.Sharma@Emulex.Com>
Tested-by: Meghana Cheripady <Meghana.Cheripady@Emulex.Com>
Tested-by: Veeresh U. Kokatnur <veereshuk@chelsio.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

1 files changed, 3 insertions, 101 deletions

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index b167c99fbfb6..e89a57d4e4f2 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1124,91 +1124,6 @@ out:
 	return ERR_PTR(rc);
 }
 
-static int
-rpcrdma_init_fmrs(struct rpcrdma_ia *ia, struct rpcrdma_buffer *buf)
-{
-	int mr_access_flags = IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ;
-	struct ib_fmr_attr fmr_attr = {
-		.max_pages	= RPCRDMA_MAX_DATA_SEGS,
-		.max_maps	= 1,
-		.page_shift	= PAGE_SHIFT
-	};
-	struct rpcrdma_mw *r;
-	int i, rc;
-
-	i = (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS;
-	dprintk("RPC:       %s: initalizing %d FMRs\n", __func__, i);
-
-	while (i--) {
-		r = kzalloc(sizeof(*r), GFP_KERNEL);
-		if (r == NULL)
-			return -ENOMEM;
-
-		r->r.fmr = ib_alloc_fmr(ia->ri_pd, mr_access_flags, &fmr_attr);
-		if (IS_ERR(r->r.fmr)) {
-			rc = PTR_ERR(r->r.fmr);
-			dprintk("RPC:       %s: ib_alloc_fmr failed %i\n",
-				__func__, rc);
-			goto out_free;
-		}
-
-		list_add(&r->mw_list, &buf->rb_mws);
-		list_add(&r->mw_all, &buf->rb_all);
-	}
-	return 0;
-
-out_free:
-	kfree(r);
-	return rc;
-}
-
-static int
-rpcrdma_init_frmrs(struct rpcrdma_ia *ia, struct rpcrdma_buffer *buf)
-{
-	struct rpcrdma_frmr *f;
-	struct rpcrdma_mw *r;
-	int i, rc;
-
-	i = (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS;
-	dprintk("RPC:       %s: initalizing %d FRMRs\n", __func__, i);
-
-	while (i--) {
-		r = kzalloc(sizeof(*r), GFP_KERNEL);
-		if (r == NULL)
-			return -ENOMEM;
-		f = &r->r.frmr;
-
-		f->fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd,
-						ia->ri_max_frmr_depth);
-		if (IS_ERR(f->fr_mr)) {
-			rc = PTR_ERR(f->fr_mr);
-			dprintk("RPC:       %s: ib_alloc_fast_reg_mr "
-				"failed %i\n", __func__, rc);
-			goto out_free;
-		}
-
-		f->fr_pgl = ib_alloc_fast_reg_page_list(ia->ri_id->device,
-							ia->ri_max_frmr_depth);
-		if (IS_ERR(f->fr_pgl)) {
-			rc = PTR_ERR(f->fr_pgl);
-			dprintk("RPC:       %s: ib_alloc_fast_reg_page_list "
-				"failed %i\n", __func__, rc);
-
-			ib_dereg_mr(f->fr_mr);
-			goto out_free;
-		}
-
-		list_add(&r->mw_list, &buf->rb_mws);
-		list_add(&r->mw_all, &buf->rb_all);
-	}
-
-	return 0;
-
-out_free:
-	kfree(r);
-	return rc;
-}
-
 int
 rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
 {
@@ -1245,22 +1160,9 @@ rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
 	buf->rb_recv_bufs = (struct rpcrdma_rep **) p;
 	p = (char *) &buf->rb_recv_bufs[buf->rb_max_requests];
 
-	INIT_LIST_HEAD(&buf->rb_mws);
-	INIT_LIST_HEAD(&buf->rb_all);
-	switch (ia->ri_memreg_strategy) {
-	case RPCRDMA_FRMR:
-		rc = rpcrdma_init_frmrs(ia, buf);
-		if (rc)
-			goto out;
-		break;
-	case RPCRDMA_MTHCAFMR:
-		rc = rpcrdma_init_fmrs(ia, buf);
-		if (rc)
-			goto out;
-		break;
-	default:
-		break;
-	}
+	rc = ia->ri_ops->ro_init(r_xprt);
+	if (rc)
+		goto out;
 
 	for (i = 0; i < buf->rb_max_requests; i++) {
 		struct rpcrdma_req *req;