[iwl-next v4 1/8] ice: devlink PF MSI-X max and min parameter

[Michal Swiatkowski <michal.swiatkowski@linux.intel.com>]

Use generic devlink PF MSI-X parameter to allow user to change MSI-X
range.

Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
---
 .../net/ethernet/intel/ice/devlink/devlink.c  | 56 ++++++++++++++++++-
 drivers/net/ethernet/intel/ice/ice.h          |  8 +++
 drivers/net/ethernet/intel/ice/ice_irq.c      |  7 +++
 3 files changed, 70 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.c b/drivers/net/ethernet/intel/ice/devlink/devlink.c
index 415445cefdb2..55538cbcf0b0 100644
--- a/drivers/net/ethernet/intel/ice/devlink/devlink.c
+++ b/drivers/net/ethernet/intel/ice/devlink/devlink.c
@@ -1518,6 +1518,32 @@ static int ice_devlink_local_fwd_validate(struct devlink *devlink, u32 id,
 	return 0;
 }
 
+static int
+ice_devlink_msix_max_pf_validate(struct devlink *devlink, u32 id,
+				 union devlink_param_value val,
+				 struct netlink_ext_ack *extack)
+{
+	if (val.vu16 > ICE_MAX_MSIX) {
+		NL_SET_ERR_MSG_MOD(extack, "Value is too high");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int
+ice_devlink_msix_min_pf_validate(struct devlink *devlink, u32 id,
+				 union devlink_param_value val,
+				 struct netlink_ext_ack *extack)
+{
+	if (val.vu16 <= ICE_MIN_MSIX) {
+		NL_SET_ERR_MSG_MOD(extack, "Value is too low");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 enum ice_param_id {
 	ICE_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 	ICE_DEVLINK_PARAM_ID_TX_SCHED_LAYERS,
@@ -1535,6 +1561,15 @@ static const struct devlink_param ice_dvl_rdma_params[] = {
 			      ice_devlink_enable_iw_validate),
 };
 
+static const struct devlink_param ice_dvl_msix_params[] = {
+	DEVLINK_PARAM_GENERIC(MSIX_VEC_PER_PF_MAX,
+			      BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
+			      NULL, NULL, ice_devlink_msix_max_pf_validate),
+	DEVLINK_PARAM_GENERIC(MSIX_VEC_PER_PF_MIN,
+			      BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
+			      NULL, NULL, ice_devlink_msix_min_pf_validate),
+};
+
 static const struct devlink_param ice_dvl_sched_params[] = {
 	DEVLINK_PARAM_DRIVER(ICE_DEVLINK_PARAM_ID_TX_SCHED_LAYERS,
 			     "tx_scheduling_layers",
@@ -1636,6 +1671,7 @@ void ice_devlink_unregister(struct ice_pf *pf)
 int ice_devlink_register_params(struct ice_pf *pf)
 {
 	struct devlink *devlink = priv_to_devlink(pf);
+	union devlink_param_value value;
 	struct ice_hw *hw = &pf->hw;
 	int status;
 
@@ -1644,11 +1680,27 @@ int ice_devlink_register_params(struct ice_pf *pf)
 	if (status)
 		return status;
 
+	status = devl_params_register(devlink, ice_dvl_msix_params,
+				      ARRAY_SIZE(ice_dvl_msix_params));
+	if (status)
+		return status;
+
 	if (hw->func_caps.common_cap.tx_sched_topo_comp_mode_en)
 		status = devl_params_register(devlink, ice_dvl_sched_params,
 					      ARRAY_SIZE(ice_dvl_sched_params));
+	if (status)
+		return status;
 
-	return status;
+	value.vu16 = pf->msix.max;
+	devl_param_driverinit_value_set(devlink,
+					DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
+					value);
+	value.vu16 = pf->msix.min;
+	devl_param_driverinit_value_set(devlink,
+					DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
+					value);
+
+	return 0;
 }
 
 void ice_devlink_unregister_params(struct ice_pf *pf)
@@ -1658,6 +1710,8 @@ void ice_devlink_unregister_params(struct ice_pf *pf)
 
 	devl_params_unregister(devlink, ice_dvl_rdma_params,
 			       ARRAY_SIZE(ice_dvl_rdma_params));
+	devl_params_unregister(devlink, ice_dvl_msix_params,
+			       ARRAY_SIZE(ice_dvl_msix_params));
 
 	if (hw->func_caps.common_cap.tx_sched_topo_comp_mode_en)
 		devl_params_unregister(devlink, ice_dvl_sched_params,
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index d2235e8bfea4..cf824d041d5a 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -96,6 +96,7 @@
 #define ICE_MIN_LAN_TXRX_MSIX	1
 #define ICE_MIN_LAN_OICR_MSIX	1
 #define ICE_MIN_MSIX		(ICE_MIN_LAN_TXRX_MSIX + ICE_MIN_LAN_OICR_MSIX)
+#define ICE_MAX_MSIX		256
 #define ICE_FDIR_MSIX		2
 #define ICE_RDMA_NUM_AEQ_MSIX	4
 #define ICE_MIN_RDMA_MSIX	2
@@ -544,6 +545,12 @@ struct ice_agg_node {
 	u8 valid;
 };
 
+struct ice_pf_msix {
+	u16 cur;
+	u16 min;
+	u16 max;
+};
+
 struct ice_pf {
 	struct pci_dev *pdev;
 	struct ice_adapter *adapter;
@@ -614,6 +621,7 @@ struct ice_pf {
 	struct msi_map ll_ts_irq;	/* LL_TS interrupt MSIX vector */
 	u16 max_pf_txqs;	/* Total Tx queues PF wide */
 	u16 max_pf_rxqs;	/* Total Rx queues PF wide */
+	struct ice_pf_msix msix;
 	u16 num_lan_msix;	/* Total MSIX vectors for base driver */
 	u16 num_lan_tx;		/* num LAN Tx queues setup */
 	u16 num_lan_rx;		/* num LAN Rx queues setup */
diff --git a/drivers/net/ethernet/intel/ice/ice_irq.c b/drivers/net/ethernet/intel/ice/ice_irq.c
index ad82ff7d1995..0659b96b9b8c 100644
--- a/drivers/net/ethernet/intel/ice/ice_irq.c
+++ b/drivers/net/ethernet/intel/ice/ice_irq.c
@@ -254,6 +254,13 @@ int ice_init_interrupt_scheme(struct ice_pf *pf)
 	int total_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;
 	int vectors, max_vectors;
 
+	/* load default PF MSI-X range */
+	if (!pf->msix.min)
+		pf->msix.min = ICE_MIN_MSIX;
+
+	if (!pf->msix.max)
+		pf->msix.max = total_vectors / 2;
+
 	vectors = ice_ena_msix_range(pf);
 
 	if (vectors < 0)
-- 
2.42.0