[dpdk-dev] [PATCH v1] net/ice: fix not clear bandwidth correctly when DCF close

[Ting Xu <ting.xu@intel.com>]

When closing DCF, the bandwidth limit configured for VFs by DCF is not
cleared correctly. The configuration will still take effect when DCF starts
again, if VFs are not re-allocated. This patch cleared VFs bandwidth limit
when DCF closes, and DCF needs to re-configure bandwidth for VFs when it
starts next time.

Fixes: 3a6bfc37eaf4 ("net/ice: support QoS config VF bandwidth in DCF")
Cc: stable@dpdk.org

Signed-off-by: Ting Xu <ting.xu@intel.com>
---
 drivers/net/ice/ice_dcf.c       | 10 ++++++---
 drivers/net/ice/ice_dcf.h       |  1 +
 drivers/net/ice/ice_dcf_sched.c | 39 ++++++++++++++++++++++++++++++++-
 3 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ice/ice_dcf.c b/drivers/net/ice/ice_dcf.c
index 045800a2d9..4c2e0c7216 100644
--- a/drivers/net/ice/ice_dcf.c
+++ b/drivers/net/ice/ice_dcf.c
@@ -706,6 +706,12 @@ ice_dcf_uninit_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw)
 	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
 	struct rte_intr_handle *intr_handle = &pci_dev->intr_handle;
 
+	if (hw->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_QOS)
+		if (hw->tm_conf.committed) {
+			ice_dcf_clear_bw(hw);
+			ice_dcf_tm_conf_uninit(eth_dev);
+		}
+
 	ice_dcf_disable_irq0(hw);
 	rte_intr_disable(intr_handle);
 	rte_intr_callback_unregister(intr_handle,
@@ -714,14 +720,12 @@ ice_dcf_uninit_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw)
 	ice_dcf_mode_disable(hw);
 	iavf_shutdown_adminq(&hw->avf);
 
-	if (hw->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_QOS)
-		ice_dcf_tm_conf_uninit(eth_dev);
-
 	rte_free(hw->arq_buf);
 	rte_free(hw->vf_vsi_map);
 	rte_free(hw->vf_res);
 	rte_free(hw->rss_lut);
 	rte_free(hw->rss_key);
+	rte_free(hw->qos_bw_cfg);
 }
 
 static int
diff --git a/drivers/net/ice/ice_dcf.h b/drivers/net/ice/ice_dcf.h
index 711c0cf3ad..36c2d0965e 100644
--- a/drivers/net/ice/ice_dcf.h
+++ b/drivers/net/ice/ice_dcf.h
@@ -133,5 +133,6 @@ int ice_dcf_link_update(struct rte_eth_dev *dev,
 void ice_dcf_tm_conf_init(struct rte_eth_dev *dev);
 void ice_dcf_tm_conf_uninit(struct rte_eth_dev *dev);
 int ice_dcf_replay_vf_bw(struct ice_dcf_hw *hw, uint16_t vf_id);
+int ice_dcf_clear_bw(struct ice_dcf_hw *hw);
 
 #endif /* _ICE_DCF_H_ */
diff --git a/drivers/net/ice/ice_dcf_sched.c b/drivers/net/ice/ice_dcf_sched.c
index 1e16654d90..090988c6e1 100644
--- a/drivers/net/ice/ice_dcf_sched.c
+++ b/drivers/net/ice/ice_dcf_sched.c
@@ -32,6 +32,9 @@ const struct rte_tm_ops ice_dcf_tm_ops = {
 	.node_delete = ice_dcf_node_delete,
 };
 
+#define ICE_DCF_SCHED_TC_NODE 0xffff
+#define ICE_DCF_VFID	0
+
 void
 ice_dcf_tm_conf_init(struct rte_eth_dev *dev)
 {
@@ -709,6 +712,32 @@ ice_dcf_replay_vf_bw(struct ice_dcf_hw *hw, uint16_t vf_id)
 	return ICE_SUCCESS;
 }
 
+int
+ice_dcf_clear_bw(struct ice_dcf_hw *hw)
+{
+	uint16_t vf_id;
+	uint32_t tc;
+	int ret, size;
+
+	size = sizeof(struct virtchnl_dcf_bw_cfg_list) +
+		sizeof(struct virtchnl_dcf_bw_cfg) *
+		(hw->tm_conf.nb_tc_node - 1);
+
+	for (vf_id = 0; vf_id < hw->num_vfs; vf_id++) {
+		for (tc = 0; tc < hw->tm_conf.nb_tc_node; tc++) {
+			hw->qos_bw_cfg[vf_id]->cfg[tc].shaper.peak = 0;
+			hw->qos_bw_cfg[vf_id]->cfg[tc].shaper.committed = 0;
+		}
+		ret = ice_dcf_set_vf_bw(hw, hw->qos_bw_cfg[vf_id], size);
+		if (ret) {
+			PMD_DRV_LOG(DEBUG, "VF %u BW clear failed", vf_id);
+			return ICE_ERR_CFG;
+		}
+	}
+
+	return ICE_SUCCESS;
+}
+
 static int ice_dcf_hierarchy_commit(struct rte_eth_dev *dev,
 				 int clear_on_fail,
 				 __rte_unused struct rte_tm_error *error)
@@ -748,7 +777,6 @@ static int ice_dcf_hierarchy_commit(struct rte_eth_dev *dev,
 	cir_total = 0;
 
 	/* init tc bw configuration */
-#define ICE_DCF_SCHED_TC_NODE 0xffff
 	tc_bw->vf_id = ICE_DCF_SCHED_TC_NODE;
 	tc_bw->node_type = VIRTCHNL_DCF_TARGET_TC_BW;
 	tc_bw->num_elem = hw->tm_conf.nb_tc_node;
@@ -825,6 +853,15 @@ static int ice_dcf_hierarchy_commit(struct rte_eth_dev *dev,
 	if (ret_val)
 		goto fail_clear;
 
+	/* store TC node bw configuration */
+	hw->qos_bw_cfg[ICE_DCF_VFID] = rte_zmalloc("tc_bw_cfg", size, 0);
+	if (!hw->qos_bw_cfg[ICE_DCF_VFID]) {
+		ret_val = ICE_ERR_NO_MEMORY;
+		goto fail_clear;
+	}
+	ice_memcpy(hw->qos_bw_cfg[ICE_DCF_VFID], tc_bw, sizeof(*tc_bw),
+		   ICE_NONDMA_TO_NONDMA);
+
 	hw->tm_conf.committed = true;
 	return ret_val;
 
-- 
2.17.1