Device attributes are large, and are used in more than one place.
Stash a copy in dynamically allocated memory.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
net/sunrpc/xprtrdma/verbs.c | 37 +++++++++++++------------------------
net/sunrpc/xprtrdma/xprt_rdma.h | 1 +
2 files changed, 14 insertions(+), 24 deletions(-)
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index aa012a3..123bb04 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -588,8 +588,8 @@ int
rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg)
{
int rc, mem_priv;
- struct ib_device_attr devattr;
struct rpcrdma_ia *ia = &xprt->rx_ia;
+ struct ib_device_attr *devattr = &ia->ri_devattr;
ia->ri_id = rpcrdma_create_id(xprt, ia, addr);
if (IS_ERR(ia->ri_id)) {
@@ -605,26 +605,21 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg)
goto out2;
}
- /*
- * 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);
+ rc = ib_query_device(ia->ri_id->device, devattr);
if (rc) {
dprintk("RPC: %s: ib_query_device failed %d\n",
__func__, rc);
goto out3;
}
- if (devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) {
+ 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;
}
if (memreg == RPCRDMA_FRMR) {
/* Requires both frmr reg and local dma lkey */
- if ((devattr.device_cap_flags &
+ 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)) {
dprintk("RPC: %s: FRMR registration "
@@ -634,7 +629,7 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg)
/* Mind the ia limit on FRMR page list depth */
ia->ri_max_frmr_depth = min_t(unsigned int,
RPCRDMA_MAX_DATA_SEGS,
- devattr.max_fast_reg_page_list_len);
+ devattr->max_fast_reg_page_list_len);
}
}
if (memreg == RPCRDMA_MTHCAFMR) {
@@ -736,20 +731,13 @@ int
rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
struct rpcrdma_create_data_internal *cdata)
{
- struct ib_device_attr devattr;
+ struct ib_device_attr *devattr = &ia->ri_devattr;
struct ib_cq *sendcq, *recvcq;
int rc, err;
- rc = ib_query_device(ia->ri_id->device, &devattr);
- if (rc) {
- dprintk("RPC: %s: ib_query_device failed %d\n",
- __func__, rc);
- return rc;
- }
-
/* check provider's send/recv wr limits */
- if (cdata->max_requests > devattr.max_qp_wr)
- cdata->max_requests = devattr.max_qp_wr;
+ if (cdata->max_requests > devattr->max_qp_wr)
+ cdata->max_requests = devattr->max_qp_wr;
ep->rep_attr.event_handler = rpcrdma_qp_async_error_upcall;
ep->rep_attr.qp_context = ep;
@@ -784,8 +772,8 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
}
ep->rep_attr.cap.max_send_wr *= depth;
- if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) {
- cdata->max_requests = devattr.max_qp_wr / depth;
+ if (ep->rep_attr.cap.max_send_wr > devattr->max_qp_wr) {
+ cdata->max_requests = devattr->max_qp_wr / depth;
if (!cdata->max_requests)
return -EINVAL;
ep->rep_attr.cap.max_send_wr = cdata->max_requests *
@@ -868,10 +856,11 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
/* Client offers RDMA Read but does not initiate */
ep->rep_remote_cma.initiator_depth = 0;
- if (devattr.max_qp_rd_atom > 32) /* arbitrary but <= 255 */
+ 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.responder_resources =
+ devattr->max_qp_rd_atom;
ep->rep_remote_cma.retry_count = 7;
ep->rep_remote_cma.flow_control = 0;
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 657c370..ec596ce 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -70,6 +70,7 @@ struct rpcrdma_ia {
int ri_async_rc;
enum rpcrdma_memreg ri_memreg_strategy;
unsigned int ri_max_frmr_depth;
+ struct ib_device_attr ri_devattr;
};
/*
--
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