i40e: move I40E_FLAG_FILTER_SYNC to a state bit

The I40E_FLAG_FILTER_SYNC flag is modified during run time possibly when
the RTNL lock is not held. Thus, it should not be part of pf->flags, and
instead should be using atomic bit operations in the pf->state field.

Create a __I40E_MACVLAN_SYNC_PENDING state bit, and use it instead of
the old I40E_FLAG_FILTER_SYNC flag.

This is part of a larger effort to remove the need for cmpxchg64 in
i40e_set_priv_flags().

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>

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 1d33a8b..52f9914 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -162,6 +162,7 @@ enum i40e_state_t {
        __I40E_RESET_FAILED,
        __I40E_PORT_SUSPENDED,
        __I40E_VF_DISABLE,
+       __I40E_MACVLAN_SYNC_PENDING,
        /* This must be last as it determines the size of the BITMAP */
        __I40E_STATE_SIZE__,
 };
@@ -516,7 +517,7 @@ struct i40e_pf {
 #define I40E_FLAG_MSIX_ENABLED                 BIT_ULL(2)
 #define I40E_FLAG_RSS_ENABLED                  BIT_ULL(3)
 #define I40E_FLAG_VMDQ_ENABLED                 BIT_ULL(4)
-#define I40E_FLAG_FILTER_SYNC                  BIT_ULL(5)
+/* Gap for BIT_ULL(5) */
 #define I40E_FLAG_SRIOV_ENABLED                        BIT_ULL(6)
 #define I40E_FLAG_DCB_CAPABLE                  BIT_ULL(7)
 #define I40E_FLAG_DCB_ENABLED                  BIT_ULL(8)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 536ed8e..7fc2c6d 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -1382,7 +1382,7 @@ struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
                hash_add(vsi->mac_filter_hash, &f->hlist, key);
 
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
-               vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
+               set_bit(__I40E_MACVLAN_SYNC_PENDING, vsi->back->state);
        }
 
        /* If we're asked to add a filter that has been marked for removal, it
@@ -1432,7 +1432,7 @@ void __i40e_del_filter(struct i40e_vsi *vsi, struct i40e_mac_filter *f)
        }
 
        vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
-       vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
+       set_bit(__I40E_MACVLAN_SYNC_PENDING, vsi->state);
 }
 
 /**
@@ -1955,7 +1955,7 @@ static void i40e_set_rx_mode(struct net_device *netdev)
        /* check for other flag changes */
        if (vsi->current_netdev_flags != vsi->netdev->flags) {
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
-               vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
+               set_bit(__I40E_MACVLAN_SYNC_PENDING, vsi->back->state);
        }
 }
 
@@ -2577,9 +2577,10 @@ static void i40e_sync_filters_subtask(struct i40e_pf *pf)
 {
        int v;
 
-       if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
+       if (!pf)
+               return;
+       if (!test_and_clear_bit(__I40E_MACVLAN_SYNC_PENDING, pf->state))
                return;
-       pf->flags &= ~I40E_FLAG_FILTER_SYNC;
 
        for (v = 0; v < pf->num_alloc_vsi; v++) {
                if (pf->vsi[v] &&
@@ -2588,7 +2589,8 @@ static void i40e_sync_filters_subtask(struct i40e_pf *pf)
 
                        if (ret) {
                                /* come back and try again later */
-                               pf->flags |= I40E_FLAG_FILTER_SYNC;
+                               set_bit(__I40E_MACVLAN_SYNC_PENDING,
+                                       pf->state);
                                break;
                        }
                }
@@ -12240,7 +12242,7 @@ static int i40e_add_vsi(struct i40e_vsi *vsi)
 
        if (f_count) {
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
-               pf->flags |= I40E_FLAG_FILTER_SYNC;
+               set_bit(__I40E_MACVLAN_SYNC_PENDING, pf->state);
        }
 
        /* Update VSI BW information */