[PATCH net-next 7/9] ice: enable_rdma devlink param

[Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>]

From: Michal Swiatkowski <michal.swiatkowski@xxxxxxxxxxxxxxx>

Implement enable_rdma devlink parameter to allow user to turn RDMA
feature on and off.

It is useful when there is no enough interrupts and user doesn't need
RDMA feature.

Reviewed-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
Reviewed-by: Jan Sokolowski <jan.sokolowski@xxxxxxxxx>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@xxxxxxxxx>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@xxxxxxxxxxxxxxx>
---
 .../net/ethernet/intel/ice/devlink/devlink.c  | 21 +++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_lib.c      |  8 ++++++-
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.c b/drivers/net/ethernet/intel/ice/devlink/devlink.c
index c53baecf8a90..725136c975e1 100644
--- a/drivers/net/ethernet/intel/ice/devlink/devlink.c
+++ b/drivers/net/ethernet/intel/ice/devlink/devlink.c
@@ -1583,6 +1583,19 @@ ice_devlink_msix_min_pf_validate(struct devlink *devlink, u32 id,
 	return 0;
 }
 
+static int ice_devlink_enable_rdma_validate(struct devlink *devlink, u32 id,
+					    union devlink_param_value val,
+					    struct netlink_ext_ack *extack)
+{
+	struct ice_pf *pf = devlink_priv(devlink);
+	bool new_state = val.vbool;
+
+	if (new_state && !test_bit(ICE_FLAG_RDMA_ENA, pf->flags))
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+
 enum ice_param_id {
 	ICE_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 	ICE_DEVLINK_PARAM_ID_TX_SCHED_LAYERS,
@@ -1598,6 +1611,8 @@ static const struct devlink_param ice_dvl_rdma_params[] = {
 			      ice_devlink_enable_iw_get,
 			      ice_devlink_enable_iw_set,
 			      ice_devlink_enable_iw_validate),
+	DEVLINK_PARAM_GENERIC(ENABLE_RDMA, BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
+			      NULL, NULL, ice_devlink_enable_rdma_validate),
 };
 
 static const struct devlink_param ice_dvl_msix_params[] = {
@@ -1738,6 +1753,12 @@ int ice_devlink_register_params(struct ice_pf *pf)
 	devl_param_driverinit_value_set(devlink,
 					DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
 					value);
+
+	value.vbool = test_bit(ICE_FLAG_RDMA_ENA, pf->flags);
+	devl_param_driverinit_value_set(devlink,
+					DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,
+					value);
+
 	return 0;
 
 unregister_msix_params:
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 1827f1f20ce8..16c419809849 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -833,7 +833,13 @@ bool ice_is_safe_mode(struct ice_pf *pf)
  */
 bool ice_is_rdma_ena(struct ice_pf *pf)
 {
-	return test_bit(ICE_FLAG_RDMA_ENA, pf->flags);
+	union devlink_param_value value;
+	int err;
+
+	err = devl_param_driverinit_value_get(priv_to_devlink(pf),
+					      DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,
+					      &value);
+	return err ? test_bit(ICE_FLAG_RDMA_ENA, pf->flags) : value.vbool;
 }
 
 /**
-- 
2.47.1