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authorParav Pandit <pandit.parav@gmail.com>2016-09-28 20:26:44 +0000
committerDoug Ledford <dledford@redhat.com>2016-10-06 13:50:04 -0400
commitb6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f (patch)
tree9d6915ef13eb5ed496e944e8da51498be7281dfc /drivers/infiniband
parentIB/{rxe,core,rdmavt}: Fix kernel crash for reg MR (diff)
downloadlinux-dev-b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f.tar.xz
linux-dev-b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f.zip
IB/rxe: Properly honor max IRD value for rd/atomic.
This patch honoris the max incoming read request count instead of outgoing read req count (a) during modify qp by allocating response queue metadata (b) during incoming read request processing Signed-off-by: Parav Pandit <pandit.parav@gmail.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/sw/rxe/rxe_loc.h2
-rw-r--r--drivers/infiniband/sw/rxe/rxe_qp.c24
-rw-r--r--drivers/infiniband/sw/rxe/rxe_resp.c2
3 files changed, 15 insertions, 13 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h
index 4a5484ef604f..73849a5a91b3 100644
--- a/drivers/infiniband/sw/rxe/rxe_loc.h
+++ b/drivers/infiniband/sw/rxe/rxe_loc.h
@@ -198,7 +198,7 @@ void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res);
static inline void rxe_advance_resp_resource(struct rxe_qp *qp)
{
qp->resp.res_head++;
- if (unlikely(qp->resp.res_head == qp->attr.max_rd_atomic))
+ if (unlikely(qp->resp.res_head == qp->attr.max_dest_rd_atomic))
qp->resp.res_head = 0;
}
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
index 22ba24f2a2c1..62c37a563df9 100644
--- a/drivers/infiniband/sw/rxe/rxe_qp.c
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -146,7 +146,7 @@ static void free_rd_atomic_resources(struct rxe_qp *qp)
if (qp->resp.resources) {
int i;
- for (i = 0; i < qp->attr.max_rd_atomic; i++) {
+ for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
struct resp_res *res = &qp->resp.resources[i];
free_rd_atomic_resource(qp, res);
@@ -174,7 +174,7 @@ static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
struct resp_res *res;
if (qp->resp.resources) {
- for (i = 0; i < qp->attr.max_rd_atomic; i++) {
+ for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
res = &qp->resp.resources[i];
free_rd_atomic_resource(qp, res);
}
@@ -596,14 +596,21 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
+ qp->attr.max_rd_atomic = max_rd_atomic;
+ atomic_set(&qp->req.rd_atomic, max_rd_atomic);
+ }
+
+ if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
+ int max_dest_rd_atomic =
+ __roundup_pow_of_two(attr->max_dest_rd_atomic);
+
+ qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
+
free_rd_atomic_resources(qp);
- err = alloc_rd_atomic_resources(qp, max_rd_atomic);
+ err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
if (err)
return err;
-
- qp->attr.max_rd_atomic = max_rd_atomic;
- atomic_set(&qp->req.rd_atomic, max_rd_atomic);
}
if (mask & IB_QP_CUR_STATE)
@@ -701,11 +708,6 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
pr_debug("set req psn = 0x%x\n", qp->req.psn);
}
- if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
- qp->attr.max_dest_rd_atomic =
- __roundup_pow_of_two(attr->max_dest_rd_atomic);
- }
-
if (mask & IB_QP_PATH_MIG_STATE)
qp->attr.path_mig_state = attr->path_mig_state;
diff --git a/drivers/infiniband/sw/rxe/rxe_resp.c b/drivers/infiniband/sw/rxe/rxe_resp.c
index 3e0f0f2baace..d544b5e84797 100644
--- a/drivers/infiniband/sw/rxe/rxe_resp.c
+++ b/drivers/infiniband/sw/rxe/rxe_resp.c
@@ -383,7 +383,7 @@ static enum resp_states check_resource(struct rxe_qp *qp,
* too many read/atomic ops, we just
* recycle the responder resource queue
*/
- if (likely(qp->attr.max_rd_atomic > 0))
+ if (likely(qp->attr.max_dest_rd_atomic > 0))
return RESPST_CHK_LENGTH;
else
return RESPST_ERR_TOO_MANY_RDMA_ATM_REQ;