IB/core: Add creation flags to struct ib_qp_init_attr
Add a create_flags member to struct ib_qp_init_attr that will allow a
kernel verbs consumer to create a pass special flags when creating a QP.
Add a flag value for telling low-level drivers that a QP will be used
for IPoIB UD LSO. The create_flags member will also be useful for XRC
and ehca low-latency QP support.
Since no create_flags handling is implemented yet, add code to all
low-level drivers to return -EINVAL if create_flags is non-zero.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 495c803..9e98cec 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1065,6 +1065,7 @@
attr.srq = srq;
attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
attr.qp_type = cmd.qp_type;
+ attr.create_flags = 0;
attr.cap.max_send_wr = cmd.max_send_wr;
attr.cap.max_recv_wr = cmd.max_recv_wr;
diff --git a/drivers/infiniband/hw/amso1100/c2_provider.c b/drivers/infiniband/hw/amso1100/c2_provider.c
index 21fb46d..e10d27a 100644
--- a/drivers/infiniband/hw/amso1100/c2_provider.c
+++ b/drivers/infiniband/hw/amso1100/c2_provider.c
@@ -245,6 +245,9 @@
pr_debug("%s:%u\n", __func__, __LINE__);
+ if (init_attr->create_flags)
+ return ERR_PTR(-EINVAL);
+
switch (init_attr->qp_type) {
case IB_QPT_RC:
qp = kzalloc(sizeof(*qp), GFP_KERNEL);
diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index a9fd419..3eb14a5 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -421,6 +421,9 @@
u32 swqe_size = 0, rwqe_size = 0, ib_qp_num;
unsigned long flags;
+ if (init_attr->create_flags)
+ return ERR_PTR(-EINVAL);
+
memset(&parms, 0, sizeof(parms));
qp_type = init_attr->qp_type;
diff --git a/drivers/infiniband/hw/ipath/ipath_qp.c b/drivers/infiniband/hw/ipath/ipath_qp.c
index 6a4a5e3..812b42c 100644
--- a/drivers/infiniband/hw/ipath/ipath_qp.c
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c
@@ -747,6 +747,11 @@
size_t sz;
struct ib_qp *ret;
+ if (init_attr->create_flags) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+
if (init_attr->cap.max_send_sge > ib_ipath_max_sges ||
init_attr->cap.max_send_wr > ib_ipath_max_qp_wrs) {
ret = ERR_PTR(-EINVAL);
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 31b2b5b..320c25fa 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -673,6 +673,9 @@
struct mlx4_ib_qp *qp;
int err;
+ if (init_attr->create_flags)
+ return ERR_PTR(-EINVAL);
+
switch (init_attr->qp_type) {
case IB_QPT_RC:
case IB_QPT_UC:
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index ee9bc14..81b257e 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -540,6 +540,9 @@
struct mthca_qp *qp;
int err;
+ if (init_attr->create_flags)
+ return ERR_PTR(-EINVAL);
+
switch (init_attr->qp_type) {
case IB_QPT_RC:
case IB_QPT_UC:
diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index 46b3b8e..7c27420 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -1252,6 +1252,9 @@
u8 rq_encoded_size;
/* int counter; */
+ if (init_attr->create_flags)
+ return ERR_PTR(-EINVAL);
+
atomic_inc(&qps_created);
switch (init_attr->qp_type) {
case IB_QPT_RC: