[PATCH v2] net/i40e: don't check link status on device start

[David Marchand]

The mentioned changes broke existing applications when the link status
of i40e ports is down at the time the port is started.
Revert those changes, the original issue will need a different fix.

Fixes: a4ba77367923 ("net/i40e: enable maximum frame size at port level")
Fixes: 2184f7cdeeaa ("net/i40e: fix max frame size config at port level")
Fixes: 719469f13b11 ("net/i40e: fix jumbo frame Rx with X722")
Cc: stable at dpdk.org

Signed-off-by: David Marchand <david.marchand at redhat.com>
---
Changes since v1:
- since the CI reports a failure on v1, simplified the fix by only
  reverting commits,

---
 drivers/net/i40e/i40e_ethdev.c | 50 +++++-----------------------------
 1 file changed, 7 insertions(+), 43 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 7726a89d99..a982e42264 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -387,7 +387,6 @@ static int i40e_set_default_mac_addr(struct rte_eth_dev *dev,
 				      struct rte_ether_addr *mac_addr);
 
 static int i40e_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
-static void i40e_set_mac_max_frame(struct rte_eth_dev *dev, uint16_t size);
 
 static int i40e_ethertype_filter_convert(
 	const struct rte_eth_ethertype_filter *input,
@@ -1711,6 +1710,11 @@ eth_i40e_dev_init(struct rte_eth_dev *dev, void *init_params __rte_unused)
 	 */
 	i40e_add_tx_flow_control_drop_filter(pf);
 
+	/* Set the max frame size to 0x2600 by default,
+	 * in case other drivers changed the default value.
+	 */
+	i40e_aq_set_mac_config(hw, I40E_FRAME_SIZE_MAX, TRUE, false, 0, NULL);
+
 	/* initialize RSS rule list */
 	TAILQ_INIT(&pf->rss_config_list);
 
@@ -2328,7 +2332,6 @@ i40e_dev_start(struct rte_eth_dev *dev)
 	uint32_t intr_vector = 0;
 	struct i40e_vsi *vsi;
 	uint16_t nb_rxq, nb_txq;
-	uint16_t max_frame_size;
 
 	hw->adapter_stopped = 0;
 
@@ -2467,9 +2470,6 @@ i40e_dev_start(struct rte_eth_dev *dev)
 			    "please call hierarchy_commit() "
 			    "before starting the port");
 
-	max_frame_size = dev->data->mtu + I40E_ETH_OVERHEAD;
-	i40e_set_mac_max_frame(dev, max_frame_size);
-
 	return I40E_SUCCESS;
 
 tx_err:
@@ -2809,9 +2809,6 @@ i40e_dev_set_link_down(struct rte_eth_dev *dev)
 	return i40e_phy_conf_link(hw, abilities, speed, false);
 }
 
-#define CHECK_INTERVAL             100  /* 100ms */
-#define MAX_REPEAT_TIME            10  /* 1s (10 * 100ms) in total */
-
 static __rte_always_inline void
 update_link_reg(struct i40e_hw *hw, struct rte_eth_link *link)
 {
@@ -2878,6 +2875,8 @@ static __rte_always_inline void
 update_link_aq(struct i40e_hw *hw, struct rte_eth_link *link,
 	bool enable_lse, int wait_to_complete)
 {
+#define CHECK_INTERVAL             100  /* 100ms */
+#define MAX_REPEAT_TIME            10  /* 1s (10 * 100ms) in total */
 	uint32_t rep_cnt = MAX_REPEAT_TIME;
 	struct i40e_link_status link_status;
 	int status;
@@ -6738,7 +6737,6 @@ i40e_dev_handle_aq_msg(struct rte_eth_dev *dev)
 			if (!ret)
 				rte_eth_dev_callback_process(dev,
 					RTE_ETH_EVENT_INTR_LSC, NULL);
-
 			break;
 		default:
 			PMD_DRV_LOG(DEBUG, "Request %u is not supported yet",
@@ -12123,40 +12121,6 @@ i40e_cloud_filter_qinq_create(struct i40e_pf *pf)
 	return ret;
 }
 
-static void
-i40e_set_mac_max_frame(struct rte_eth_dev *dev, uint16_t size)
-{
-	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-	uint32_t rep_cnt = MAX_REPEAT_TIME;
-	struct rte_eth_link link;
-	enum i40e_status_code status;
-	bool can_be_set = true;
-
-	/*
-	 * I40E_MEDIA_TYPE_BASET link up can be ignored
-	 * I40E_MEDIA_TYPE_BASET link down that hw->phy.media_type
-	 * is I40E_MEDIA_TYPE_UNKNOWN
-	 */
-	if (hw->phy.media_type != I40E_MEDIA_TYPE_BASET &&
-	    hw->phy.media_type != I40E_MEDIA_TYPE_UNKNOWN) {
-		do {
-			update_link_reg(hw, &link);
-			if (link.link_status)
-				break;
-			rte_delay_ms(CHECK_INTERVAL);
-		} while (--rep_cnt);
-		can_be_set = !!link.link_status;
-	}
-
-	if (can_be_set) {
-		status = i40e_aq_set_mac_config(hw, size, TRUE, 0, false, NULL);
-		if (status != I40E_SUCCESS)
-			PMD_DRV_LOG(ERR, "Failed to set max frame size at port level");
-	} else {
-		PMD_DRV_LOG(ERR, "Set max frame size at port level not applicable on link down");
-	}
-}
-
 RTE_LOG_REGISTER_SUFFIX(i40e_logtype_init, init, NOTICE);
 RTE_LOG_REGISTER_SUFFIX(i40e_logtype_driver, driver, NOTICE);
 #ifdef RTE_ETHDEV_DEBUG_RX
-- 
2.38.1