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.le...@oracle.com>
Reviewed-by: Sagi Grimberg <sa...@mellanox.com>
Tested-by: Devesh Sharma <devesh.sha...@emulex.com>
Tested-by: Meghana Cheripady <meghana.cherip...@emulex.com>
Tested-by: Veeresh U. Kokatnur <veeres...@chelsio.com>
---
net/sunrpc/xprtrdma/fmr_ops.c | 42 +++++++++++++++
net/sunrpc/xprtrdma/frwr_ops.c | 66 +++++++++++++++++++++++
net/sunrpc/xprtrdma/physical_ops.c | 7 ++
net/sunrpc/xprtrdma/verbs.c | 104 +-----------------------------------
net/sunrpc/xprtrdma/xprt_rdma.h | 1
5 files changed, 119 insertions(+), 101 deletions(-)
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c
index 888aa10..825ce96 100644
--- a/net/sunrpc/xprtrdma/fmr_ops.c
+++ b/net/sunrpc/xprtrdma/fmr_ops.c
@@ -29,6 +29,47 @@ fmr_op_maxpages(struct rpcrdma_xprt *r_xprt)
rpcrdma_max_segments(r_xprt) * RPCRDMA_MAX_FMR_SGES);
}
+static int
+fmr_op_init(struct rpcrdma_xprt *r_xprt)
+{
+ struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
+ int mr_access_flags = IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ;
+ struct ib_fmr_attr fmr_attr = {
+ .max_pages = RPCRDMA_MAX_FMR_SGES,
+ .max_maps = 1,
+ .page_shift = PAGE_SHIFT
+ };
+ struct ib_pd *pd = r_xprt->rx_ia.ri_pd;
+ struct rpcrdma_mw *r;
+ int i, rc;
+
+ INIT_LIST_HEAD(&buf->rb_mws);
+ INIT_LIST_HEAD(&buf->rb_all);
+
+ 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)
+ return -ENOMEM;
+
+ r->r.fmr = ib_alloc_fmr(pd, mr_access_flags, &fmr_attr);
+ if (IS_ERR(r->r.fmr))
+ goto out_fmr_err;
+
+ list_add(&r->mw_list, &buf->rb_mws);
+ list_add(&r->mw_all, &buf->rb_all);
+ }
+ return 0;
+
+out_fmr_err:
+ rc = PTR_ERR(r->r.fmr);
+ dprintk("RPC: %s: ib_alloc_fmr status %i\n", __func__, rc);
+ kfree(r);
+ return rc;
+}
+
/* Use the ib_map_phys_fmr() verb to register a memory region
* for remote access via RDMA READ or RDMA WRITE.
*/
@@ -109,5 +150,6 @@ const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops = {
.ro_map = fmr_op_map,
.ro_unmap = fmr_op_unmap,
.ro_maxpages = fmr_op_maxpages,
+ .ro_init = fmr_op_init,
.ro_displayname = "fmr",
};
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c
index 35b725b..9168c15 100644
--- a/net/sunrpc/xprtrdma/frwr_ops.c
+++ b/net/sunrpc/xprtrdma/frwr_ops.c
@@ -17,6 +17,35 @@
# define RPCDBG_FACILITY RPCDBG_TRANS
#endif
+static int
+__frwr_init(struct rpcrdma_mw *r, struct ib_pd *pd, struct ib_device *device,
+ unsigned int depth)
+{
+ struct rpcrdma_frmr *f = &r->r.frmr;
+ int rc;
+
+ f->fr_mr = ib_alloc_fast_reg_mr(pd, depth);
+ if (IS_ERR(f->fr_mr))
+ goto out_mr_err;
+ f->fr_pgl = ib_alloc_fast_reg_page_list(device, depth);
+ if (IS_ERR(f->fr_pgl))
+ goto out_list_err;
+ return 0;
+
+out_mr_err:
+ rc = PTR_ERR(f->fr_mr);
+ dprintk("RPC: %s: ib_alloc_fast_reg_mr status %i\n",
+ __func__, rc);
+ return rc;
+
+out_list_err:
+ rc = PTR_ERR(f->fr_pgl);
+ dprintk("RPC: %s: ib_alloc_fast_reg_page_list status %i\n",
+ __func__, rc);
+ ib_dereg_mr(f->fr_mr);
+ return rc;
+}
+
/* FRWR mode conveys a list of pages per chunk segment. The
* maximum length of that list is the FRWR page list depth.
*/
@@ -29,6 +58,42 @@ frwr_op_maxpages(struct rpcrdma_xprt *r_xprt)
rpcrdma_max_segments(r_xprt) * ia->ri_max_frmr_depth);
}
+static int
+frwr_op_init(struct rpcrdma_xprt *r_xprt)
+{
+ struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
+ struct ib_device *device = r_xprt->rx_ia.ri_id->device;
+ unsigned int depth = r_xprt->rx_ia.ri_max_frmr_depth;
+ struct ib_pd *pd = r_xprt->rx_ia.ri_pd;
+ int i;
+
+ INIT_LIST_HEAD(&buf->rb_mws);
+ INIT_LIST_HEAD(&buf->rb_all);
+
+ i = (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS;
+ dprintk("RPC: %s: initalizing %d FRMRs\n", __func__, i);
+
+ while (i--) {
+ struct rpcrdma_mw *r;
+ int rc;
+
+ r = kzalloc(sizeof(*r), GFP_KERNEL);
+ if (!r)
+ return -ENOMEM;
+
+ rc = __frwr_init(r, pd, device, depth);
+ if (rc) {
+ kfree(r);
+ return rc;
+ }
+
+ list_add(&r->mw_list, &buf->rb_mws);
+ list_add(&r->mw_all, &buf->rb_all);
+ }
+
+ return 0;
+}
+
/* Post a FAST_REG Work Request to register a memory region
* for remote access via RDMA READ or RDMA WRITE.
*/
@@ -149,5 +214,6 @@ const struct rpcrdma_memreg_ops rpcrdma_frwr_memreg_ops = {
.ro_map = frwr_op_map,
.ro_unmap = frwr_op_unmap,
.ro_maxpages = frwr_op_maxpages,
+ .ro_init = frwr_op_init,
.ro_displayname = "frwr",
};
diff --git a/net/sunrpc/xprtrdma/physical_ops.c
b/net/sunrpc/xprtrdma/physical_ops.c
index 5b5a63a..c372051 100644
--- a/net/sunrpc/xprtrdma/physical_ops.c
+++ b/net/sunrpc/xprtrdma/physical_ops.c
@@ -28,6 +28,12 @@ physical_op_maxpages(struct rpcrdma_xprt *r_xprt)
rpcrdma_max_segments(r_xprt));
}
+static int
+physical_op_init(struct rpcrdma_xprt *r_xprt)
+{
+ return 0;
+}
+
/* The client's physical memory is already exposed for
* remote access via RDMA READ or RDMA WRITE.
*/
@@ -57,5 +63,6 @@ const struct rpcrdma_memreg_ops rpcrdma_physical_memreg_ops =
{
.ro_map = physical_op_map,
.ro_unmap = physical_op_unmap,
.ro_maxpages = physical_op_maxpages,
+ .ro_init = physical_op_init,
.ro_displayname = "physical",
};
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index b167c99..e89a57d 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;
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 9a727f9..90b60fe 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -341,6 +341,7 @@ struct rpcrdma_memreg_ops {
int (*ro_unmap)(struct rpcrdma_xprt *,
struct rpcrdma_mr_seg *);
size_t (*ro_maxpages)(struct rpcrdma_xprt *);
+ int (*ro_init)(struct rpcrdma_xprt *);
const char *ro_displayname;
};
--
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