i40e: separate PF and VSI state flags

Avoid using the same named flags for both vsi->state and pf->state. This
makes code review easier, as it is more likely that future authors will
use the correct state field when checking bits. Previous commits already
found issues with at least one check, and possibly others may be
incorrect.

This reduces confusion as it is more clear what each flag represents,
and which flags are valid for which state field.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 32 insertions, 34 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 20850a646e6c..c30f2bc65451 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -422,7 +422,7 @@ static void i40e_get_netdev_stats_struct(struct net_device *netdev,
 	struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
 	int i;
 
-	if (test_bit(__I40E_DOWN, &vsi->state))
+	if (test_bit(__I40E_VSI_DOWN, &vsi->state))
 		return;
 
 	if (!vsi->tx_rings)
@@ -753,7 +753,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
 	u64 tx_p, tx_b;
 	u16 q;
 
-	if (test_bit(__I40E_DOWN, &vsi->state) ||
+	if (test_bit(__I40E_VSI_DOWN, &vsi->state) ||
 	    test_bit(__I40E_CONFIG_BUSY, &pf->state))
 		return;
 
@@ -1346,7 +1346,7 @@ struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
 		 * to failed, so we don't bother to try sending the filter
 		 * to the hardware.
 		 */
-		if (test_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state))
+		if (test_bit(__I40E_VSI_OVERFLOW_PROMISC, &vsi->state))
 			f->state = I40E_FILTER_FAILED;
 		else
 			f->state = I40E_FILTER_NEW;
@@ -1525,7 +1525,7 @@ static int i40e_set_mac(struct net_device *netdev, void *p)
 		return 0;
 	}
 
-	if (test_bit(__I40E_DOWN, &vsi->back->state) ||
+	if (test_bit(__I40E_VSI_DOWN, &vsi->back->state) ||
 	    test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
 		return -EADDRNOTAVAIL;
 
@@ -1920,7 +1920,7 @@ void i40e_aqc_add_filters(struct i40e_vsi *vsi, const char *vsi_name,
 
 	if (fcnt != num_add) {
 		*promisc_changed = true;
-		set_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
+		set_bit(__I40E_VSI_OVERFLOW_PROMISC, &vsi->state);
 		dev_warn(&vsi->back->pdev->dev,
 			 "Error %s adding RX filters on %s, promiscuous mode forced on\n",
 			 i40e_aq_str(hw, aq_err),
@@ -2003,7 +2003,7 @@ int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
 	struct i40e_aqc_add_macvlan_element_data *add_list;
 	struct i40e_aqc_remove_macvlan_element_data *del_list;
 
-	while (test_and_set_bit(__I40E_CONFIG_BUSY, &vsi->state))
+	while (test_and_set_bit(__I40E_VSI_SYNCING_FILTERS, &vsi->state))
 		usleep_range(1000, 2000);
 	pf = vsi->back;
 
@@ -2139,7 +2139,7 @@ int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
 
 		num_add = 0;
 		hlist_for_each_entry_safe(new, h, &tmp_add_list, hlist) {
-			if (test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
+			if (test_bit(__I40E_VSI_OVERFLOW_PROMISC,
 				     &vsi->state)) {
 				new->state = I40E_FILTER_FAILED;
 				continue;
@@ -2227,20 +2227,20 @@ int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
 	 * safely exit if we didn't just enter, we no longer have any failed
 	 * filters, and we have reduced filters below the threshold value.
 	 */
-	if (test_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state) &&
+	if (test_bit(__I40E_VSI_OVERFLOW_PROMISC, &vsi->state) &&
 	    !promisc_changed && !failed_filters &&
 	    (vsi->active_filters < vsi->promisc_threshold)) {
 		dev_info(&pf->pdev->dev,
 			 "filter logjam cleared on %s, leaving overflow promiscuous mode\n",
 			 vsi_name);
-		clear_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
+		clear_bit(__I40E_VSI_OVERFLOW_PROMISC, &vsi->state);
 		promisc_changed = true;
 		vsi->promisc_threshold = 0;
 	}
 
 	/* if the VF is not trusted do not do promisc */
 	if ((vsi->type == I40E_VSI_SRIOV) && !pf->vf[vsi->vf_id].trusted) {
-		clear_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
+		clear_bit(__I40E_VSI_OVERFLOW_PROMISC, &vsi->state);
 		goto out;
 	}
 
@@ -2265,11 +2265,11 @@ int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
 	}
 	if ((changed_flags & IFF_PROMISC) ||
 	    (promisc_changed &&
-	     test_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state))) {
+	     test_bit(__I40E_VSI_OVERFLOW_PROMISC, &vsi->state))) {
 		bool cur_promisc;
 
 		cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
-			       test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
+			       test_bit(__I40E_VSI_OVERFLOW_PROMISC,
 					&vsi->state));
 		if ((vsi->type == I40E_VSI_MAIN) &&
 		    (pf->lan_veb != I40E_NO_VEB) &&
@@ -2353,7 +2353,7 @@ out:
 	if (retval)
 		vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
 
-	clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
+	clear_bit(__I40E_VSI_SYNCING_FILTERS, &vsi->state);
 	return retval;
 
 err_no_memory:
@@ -2365,7 +2365,7 @@ err_no_memory_locked:
 	spin_unlock_bh(&vsi->mac_filter_hash_lock);
 
 	vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
-	clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
+	clear_bit(__I40E_VSI_SYNCING_FILTERS, &vsi->state);
 	return -ENOMEM;
 }
 
@@ -3907,7 +3907,7 @@ static void i40e_netpoll(struct net_device *netdev)
 	int i;
 
 	/* if interface is down do nothing */
-	if (test_bit(__I40E_DOWN, &vsi->state))
+	if (test_bit(__I40E_VSI_DOWN, &vsi->state))
 		return;
 
 	if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
@@ -4436,7 +4436,7 @@ static void i40e_napi_disable_all(struct i40e_vsi *vsi)
 static void i40e_vsi_close(struct i40e_vsi *vsi)
 {
 	struct i40e_pf *pf = vsi->back;
-	if (!test_and_set_bit(__I40E_DOWN, &vsi->state))
+	if (!test_and_set_bit(__I40E_VSI_DOWN, &vsi->state))
 		i40e_down(vsi);
 	i40e_vsi_free_irq(vsi);
 	i40e_vsi_free_tx_resources(vsi);
@@ -4453,10 +4453,10 @@ static void i40e_vsi_close(struct i40e_vsi *vsi)
  **/
 static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
 {
-	if (test_bit(__I40E_DOWN, &vsi->state))
+	if (test_bit(__I40E_VSI_DOWN, &vsi->state))
 		return;
 
-	set_bit(__I40E_NEEDS_RESTART, &vsi->state);
+	set_bit(__I40E_VSI_NEEDS_RESTART, &vsi->state);
 	if (vsi->netdev && netif_running(vsi->netdev))
 		vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
 	else
@@ -4469,10 +4469,9 @@ static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
  **/
 static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
 {
-	if (!test_bit(__I40E_NEEDS_RESTART, &vsi->state))
+	if (!test_and_clear_bit(__I40E_VSI_NEEDS_RESTART, &vsi->state))
 		return;
 
-	clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
 	if (vsi->netdev && netif_running(vsi->netdev))
 		vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
 	else
@@ -4638,7 +4637,7 @@ static void i40e_detect_recover_hung(struct i40e_pf *pf)
 		return;
 
 	/* Make sure, VSI state is not DOWN/RECOVERY_PENDING */
-	if (test_bit(__I40E_DOWN, &vsi->back->state) ||
+	if (test_bit(__I40E_VSI_DOWN, &vsi->back->state) ||
 	    test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
 		return;
 
@@ -5354,7 +5353,7 @@ static int i40e_up_complete(struct i40e_vsi *vsi)
 	if (err)
 		return err;
 
-	clear_bit(__I40E_DOWN, &vsi->state);
+	clear_bit(__I40E_VSI_DOWN, &vsi->state);
 	i40e_napi_enable_all(vsi);
 	i40e_vsi_enable_irq(vsi);
 
@@ -5435,7 +5434,7 @@ void i40e_down(struct i40e_vsi *vsi)
 	int i;
 
 	/* It is assumed that the caller of this function
-	 * sets the vsi->state __I40E_DOWN bit.
+	 * sets the vsi->state __I40E_VSI_DOWN bit.
 	 */
 	if (vsi->netdev) {
 		netif_carrier_off(vsi->netdev);
@@ -5787,10 +5786,9 @@ void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags, bool lock_acquired)
 			struct i40e_vsi *vsi = pf->vsi[v];
 
 			if (vsi != NULL &&
-			    test_bit(__I40E_REINIT_REQUESTED, &vsi->state)) {
+			    test_and_clear_bit(__I40E_VSI_REINIT_REQUESTED,
+					       &vsi->state))
 				i40e_vsi_reinit_locked(pf->vsi[v]);
-				clear_bit(__I40E_REINIT_REQUESTED, &vsi->state);
-			}
 		}
 	} else if (reset_flags & BIT_ULL(__I40E_DOWN_REQUESTED)) {
 		int v;
@@ -5801,10 +5799,10 @@ void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags, bool lock_acquired)
 			struct i40e_vsi *vsi = pf->vsi[v];
 
 			if (vsi != NULL &&
-			    test_bit(__I40E_DOWN_REQUESTED, &vsi->state)) {
-				set_bit(__I40E_DOWN, &vsi->state);
+			    test_and_clear_bit(__I40E_VSI_DOWN_REQUESTED,
+					       &vsi->state)) {
+				set_bit(__I40E_VSI_DOWN, &vsi->state);
 				i40e_down(vsi);
-				clear_bit(__I40E_DOWN_REQUESTED, &vsi->state);
 			}
 		}
 	} else {
@@ -6223,7 +6221,7 @@ static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
  **/
 static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
 {
-	if (!vsi || test_bit(__I40E_DOWN, &vsi->state))
+	if (!vsi || test_bit(__I40E_VSI_DOWN, &vsi->state))
 		return;
 
 	switch (vsi->type) {
@@ -6316,11 +6314,11 @@ static void i40e_link_event(struct i40e_pf *pf)
 
 	if (new_link == old_link &&
 	    new_link_speed == old_link_speed &&
-	    (test_bit(__I40E_DOWN, &vsi->state) ||
+	    (test_bit(__I40E_VSI_DOWN, &vsi->state) ||
 	     new_link == netif_carrier_ok(vsi->netdev)))
 		return;
 
-	if (!test_bit(__I40E_DOWN, &vsi->state))
+	if (!test_bit(__I40E_VSI_DOWN, &vsi->state))
 		i40e_print_link_message(vsi, new_link);
 
 	/* Notify the base of the switch tree connected to
@@ -7591,7 +7589,7 @@ static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
 	}
 	vsi->type = type;
 	vsi->back = pf;
-	set_bit(__I40E_DOWN, &vsi->state);
+	set_bit(__I40E_VSI_DOWN, &vsi->state);
 	vsi->flags = 0;
 	vsi->idx = vsi_idx;
 	vsi->int_rate_limit = 0;
@@ -9718,7 +9716,7 @@ static int i40e_add_vsi(struct i40e_vsi *vsi)
 	}
 
 	vsi->active_filters = 0;
-	clear_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
+	clear_bit(__I40E_VSI_OVERFLOW_PROMISC, &vsi->state);
 	spin_lock_bh(&vsi->mac_filter_hash_lock);
 	/* If macvlan filters already exist, force them to get loaded */
 	hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {