net/9p: Remove ib_get_dma_mr calls

The pd now has a local_dma_lkey member which completely replaces
ib_get_dma_mr, use it instead.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Dominique Martinet <dominique.martinet@cea.fr>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c
index 37a78d2..ba12102 100644 (file)
--- a/net/9p/trans_rdma.c
+++ b/net/9p/trans_rdma.c
@@ -94,8 +94,6 @@ struct p9_trans_rdma {
        struct ib_pd *pd;
        struct ib_qp *qp;
        struct ib_cq *cq;
-       struct ib_mr *dma_mr;
-       u32 lkey;
        long timeout;
        int sq_depth;
        struct semaphore sq_sem;
@@ -382,9 +380,6 @@ static void rdma_destroy_trans(struct p9_trans_rdma *rdma)
        if (!rdma)
                return;
 
-       if (rdma->dma_mr && !IS_ERR(rdma->dma_mr))
-               ib_dereg_mr(rdma->dma_mr);
-
        if (rdma->qp && !IS_ERR(rdma->qp))
                ib_destroy_qp(rdma->qp);
 
@@ -415,7 +410,7 @@ post_recv(struct p9_client *client, struct p9_rdma_context *c)
 
        sge.addr = c->busa;
        sge.length = client->msize;
-       sge.lkey = rdma->lkey;
+       sge.lkey = rdma->pd->local_dma_lkey;
 
        wr.next = NULL;
        c->wc_op = IB_WC_RECV;
@@ -506,7 +501,7 @@ dont_need_post_recv:
 
        sge.addr = c->busa;
        sge.length = c->req->tc->size;
-       sge.lkey = rdma->lkey;
+       sge.lkey = rdma->pd->local_dma_lkey;
 
        wr.next = NULL;
        c->wc_op = IB_WC_SEND;
@@ -647,7 +642,6 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args)
        struct p9_trans_rdma *rdma;
        struct rdma_conn_param conn_param;
        struct ib_qp_init_attr qp_attr;
-       struct ib_device_attr devattr;
        struct ib_cq_init_attr cq_attr = {};
 
        /* Parse the transport specific mount options */
@@ -700,11 +694,6 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args)
        if (err || (rdma->state != P9_RDMA_ROUTE_RESOLVED))
                goto error;
 
-       /* Query the device attributes */
-       err = ib_query_device(rdma->cm_id->device, &devattr);
-       if (err)
-               goto error;
-
        /* Create the Completion Queue */
        cq_attr.cqe = opts.sq_depth + opts.rq_depth + 1;
        rdma->cq = ib_create_cq(rdma->cm_id->device, cq_comp_handler,
@@ -719,17 +708,6 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args)
        if (IS_ERR(rdma->pd))
                goto error;
 
-       /* Cache the DMA lkey in the transport */
-       rdma->dma_mr = NULL;
-       if (devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
-               rdma->lkey = rdma->cm_id->device->local_dma_lkey;
-       else {
-               rdma->dma_mr = ib_get_dma_mr(rdma->pd, IB_ACCESS_LOCAL_WRITE);
-               if (IS_ERR(rdma->dma_mr))
-                       goto error;
-               rdma->lkey = rdma->dma_mr->lkey;
-       }
-
        /* Create the Queue Pair */
        memset(&qp_attr, 0, sizeof qp_attr);
        qp_attr.event_handler = qp_event_handler;