summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorYamin Friedman <yaminf@mellanox.com>2020-05-27 11:34:52 +0300
committerJason Gunthorpe <jgg@mellanox.com>2020-05-29 15:40:51 -0300
commit3446cbd2d523fdaf37f3772082071d1154c419d9 (patch)
tree205c3b7700d47311a9ebd1708dfeb039fbcfce3d /drivers
parent0b8e125e213204508e1b3c4bdfe69713280b7abd (diff)
downloadlinux-3446cbd2d523fdaf37f3772082071d1154c419d9.tar.bz2
RDMA/core: Add protection for shared CQs used by ULPs
A pre-step for adding shared CQs. Add the infrastructure to prevent shared CQ users from altering the CQ configurations. For now all cqs are marked as private (non-shared). The core driver should use the new force functions to perform resize/destroy/moderation changes that are not allowed for users of shared CQs. Link: https://lore.kernel.org/r/1590568495-101621-2-git-send-email-yaminf@mellanox.com Signed-off-by: Yamin Friedman <yaminf@mellanox.com> Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com> Reviewed-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/core/verbs.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index e2c9430a3ff1..21815e125e98 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2005,6 +2005,9 @@ EXPORT_SYMBOL(__ib_create_cq);
int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
{
+ if (cq->shared)
+ return -EOPNOTSUPP;
+
return cq->device->ops.modify_cq ?
cq->device->ops.modify_cq(cq, cq_count,
cq_period) : -EOPNOTSUPP;
@@ -2013,6 +2016,9 @@ EXPORT_SYMBOL(rdma_set_cq_moderation);
int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)
{
+ if (WARN_ON_ONCE(cq->shared))
+ return -EOPNOTSUPP;
+
if (atomic_read(&cq->usecnt))
return -EBUSY;
@@ -2025,6 +2031,9 @@ EXPORT_SYMBOL(ib_destroy_cq_user);
int ib_resize_cq(struct ib_cq *cq, int cqe)
{
+ if (cq->shared)
+ return -EOPNOTSUPP;
+
return cq->device->ops.resize_cq ?
cq->device->ops.resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
}