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path: root/net/sunrpc/xprtrdma/fmr_ops.c
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Diffstat (limited to 'net/sunrpc/xprtrdma/fmr_ops.c')
-rw-r--r--net/sunrpc/xprtrdma/fmr_ops.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c
index f1e8dafbd507..cb25c89da623 100644
--- a/net/sunrpc/xprtrdma/fmr_ops.c
+++ b/net/sunrpc/xprtrdma/fmr_ops.c
@@ -39,6 +39,25 @@ static int
fmr_op_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep,
struct rpcrdma_create_data_internal *cdata)
{
+ struct ib_device_attr *devattr = &ia->ri_devattr;
+ struct ib_mr *mr;
+
+ /* Obtain an lkey to use for the regbufs, which are
+ * protected from remote access.
+ */
+ if (devattr->device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) {
+ ia->ri_dma_lkey = ia->ri_device->local_dma_lkey;
+ } else {
+ mr = ib_get_dma_mr(ia->ri_pd, IB_ACCESS_LOCAL_WRITE);
+ if (IS_ERR(mr)) {
+ pr_err("%s: ib_get_dma_mr for failed with %lX\n",
+ __func__, PTR_ERR(mr));
+ return -ENOMEM;
+ }
+ ia->ri_dma_lkey = ia->ri_dma_mr->lkey;
+ ia->ri_dma_mr = mr;
+ }
+
return 0;
}