[PATCH rdma-next v2 7/7] RDMA/core: Create clean QP creations interface for uverbs

Leon Romanovsky
2021-08-03T18:21:19Z

Unify create QP creation interface to make clean approach to create
XRC_TGT and regular QPs.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
drivers/infiniband/core/core_priv.h | 9 +--
drivers/infiniband/core/uverbs_cmd.c | 13 +---
drivers/infiniband/core/uverbs_std_types_qp.c | 10 +--
drivers/infiniband/core/verbs.c | 72 +++++++++++--------
4 files changed, 52 insertions(+), 52 deletions(-)

diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h
index d8f464b43dbc..f66f48d860ec 100644
--- a/drivers/infiniband/core/core_priv.h
+++ b/drivers/infiniband/core/core_priv.h
@@ -316,10 +316,11 @@ struct ib_device *ib_device_get_by_index(const struct net *net, u32 index);
void nldev_init(void);
void nldev_exit(void);

-struct ib_qp *_ib_create_qp(struct ib_device *dev, struct ib_pd *pd,
- struct ib_qp_init_attr *attr,
- struct ib_udata *udata, struct ib_uqp_object *uobj,
- const char *caller);
+struct ib_qp *ib_create_qp_user(struct ib_device *dev, struct ib_pd *pd,
+ struct ib_qp_init_attr *attr,
+ struct ib_udata *udata,
+ struct ib_uqp_object *uobj, const char *caller);
+
void ib_qp_usecnt_inc(struct ib_qp *qp);
void ib_qp_usecnt_dec(struct ib_qp *qp);

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 62cafd768d89..740e6b2efe0e 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1435,23 +1435,14 @@ static int create_qp(struct uverbs_attr_bundle *attrs,
attr.source_qpn = cmd->source_qpn;
}

- if (cmd->qp_type == IB_QPT_XRC_TGT)
- qp = ib_create_qp(pd, &attr);
- else
- qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, obj,
- NULL);
-
+ qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj,
+ KBUILD_MODNAME);
if (IS_ERR(qp)) {
ret = PTR_ERR(qp);
goto err_put;
}
ib_qp_usecnt_inc(qp);

- if (cmd->qp_type == IB_QPT_XRC_TGT) {
- /* It is done in _ib_create_qp for other QP types */
- qp->uobject = obj;
- }
-
obj->uevent.uobject.object = qp;
obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
if (obj->uevent.event_file)
diff --git a/drivers/infiniband/core/uverbs_std_types_qp.c b/drivers/infiniband/core/uverbs_std_types_qp.c
index a0e734735ba5..dd1075466f61 100644
--- a/drivers/infiniband/core/uverbs_std_types_qp.c
+++ b/drivers/infiniband/core/uverbs_std_types_qp.c
@@ -248,12 +248,8 @@ static int UVERBS_HANDLER(UVERBS_METHOD_QP_CREATE)(
set_caps(&attr, &cap, true);
mutex_init(&obj->mcast_lock);

- if (attr.qp_type == IB_QPT_XRC_TGT)
- qp = ib_create_qp(pd, &attr);
- else
- qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, obj,
- NULL);
-
+ qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj,
+ KBUILD_MODNAME);
if (IS_ERR(qp)) {
ret = PTR_ERR(qp);
goto err_put;
@@ -264,8 +260,6 @@ static int UVERBS_HANDLER(UVERBS_METHOD_QP_CREATE)(
obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
uobject);
atomic_inc(&obj->uxrcd->refcnt);
- /* It is done in _ib_create_qp for other QP types */
- qp->uobject = obj;
}

obj->uevent.uobject.object = qp;
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index a568155b63f5..89a2b21976d6 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1200,21 +1200,10 @@ static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp,
return qp;
}

-/**
- * _ib_create_qp - Creates a QP associated with the specified protection domain
- * @dev: IB device
- * @pd: The protection domain associated with the QP.
- * @attr: A list of initial attributes required to create the
- * QP. If QP creation succeeds, then the attributes are updated to
- * the actual capabilities of the created QP.
- * @udata: User data
- * @uobj: uverbs obect
- * @caller: caller's build-time module name
- */
-struct ib_qp *_ib_create_qp(struct ib_device *dev, struct ib_pd *pd,
- struct ib_qp_init_attr *attr,
- struct ib_udata *udata, struct ib_uqp_object *uobj,
- const char *caller)
+static struct ib_qp *create_qp(struct ib_device *dev, struct ib_pd *pd,
+ struct ib_qp_init_attr *attr,
+ struct ib_udata *udata,
+ struct ib_uqp_object *uobj, const char *caller)
{
struct ib_udata dummy = {};
struct ib_qp *qp;
@@ -1272,7 +1261,43 @@ struct ib_qp *_ib_create_qp(struct ib_device *dev, struct ib_pd *pd,
return ERR_PTR(ret);

}
-EXPORT_SYMBOL(_ib_create_qp);
+
+/**
+ * ib_create_qp_user - Creates a QP associated with the specified protection
+ * domain.
+ * @dev: IB device
+ * @pd: The protection domain associated with the QP.
+ * @attr: A list of initial attributes required to create the
+ * QP. If QP creation succeeds, then the attributes are updated to
+ * the actual capabilities of the created QP.
+ * @udata: User data
+ * @uobj: uverbs obect
+ * @caller: caller's build-time module name
+ */
+struct ib_qp *ib_create_qp_user(struct ib_device *dev, struct ib_pd *pd,
+ struct ib_qp_init_attr *attr,
+ struct ib_udata *udata,
+ struct ib_uqp_object *uobj, const char *caller)
+{
+ struct ib_qp *qp, *xrc_qp;
+
+ if (attr->qp_type == IB_QPT_XRC_TGT)
+ qp = create_qp(dev, pd, attr, NULL, NULL, caller);
+ else
+ qp = create_qp(dev, pd, attr, udata, uobj, NULL);
+ if (attr->qp_type != IB_QPT_XRC_TGT || IS_ERR(qp))
+ return qp;
+
+ xrc_qp = create_xrc_qp_user(qp, attr);
+ if (IS_ERR(xrc_qp)) {
+ ib_destroy_qp(qp);
+ return xrc_qp;
+ }
+
+ xrc_qp->uobject = uobj;
+ return xrc_qp;
+}
+EXPORT_SYMBOL(ib_create_qp_user);

void ib_qp_usecnt_inc(struct ib_qp *qp)
{
@@ -1308,7 +1333,7 @@ struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd,
struct ib_qp_init_attr *qp_init_attr,
const char *caller)
{
- struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
+ struct ib_device *device = pd->device;
struct ib_qp *qp;
int ret;

@@ -1321,21 +1346,10 @@ struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd,
if (qp_init_attr->cap.max_rdma_ctxs)
rdma_rw_init_qp(device, qp_init_attr);

- qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL, caller);
+ qp = create_qp(device, pd, qp_init_attr, NULL, NULL, caller);
if (IS_ERR(qp))
return qp;

- if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
- struct ib_qp *xrc_qp =
- create_xrc_qp_user(qp, qp_init_attr);
-
- if (IS_ERR(xrc_qp)) {
- ret = PTR_ERR(xrc_qp);
- goto err;
- }
- return xrc_qp;
- }
-
ib_qp_usecnt_inc(qp);

if (qp_init_attr->cap.max_rdma_ctxs) {
--
2.31.1