i40e: use DECLARE_BITMAP for state fields

Instead of assuming our flags fit within an unsigned long, use
DECLARE_BITMAP which will ensure that we always allocate enough space.
Additionally, use __I40E_STATE_SIZE__ markers as the last element of the
enumeration so that the size of the BITMAP is compile-time assigned
rather than programmer-time assigned. This ensures that potential future
flag additions do not actually overrun the array. This is especially
important as 32bit systems would only have 32bit longs instead of 64bit
longs as we generally have assumed in the prior code.

This change also removes a dereference of the state fields throughout
the code, so it does have a bit of code churn. The conversions were
automated using sed replacements with an alternation

  s/&(vsi->back|vsi|pf)->state/\1->state/
  s/&adapter->vsi.state/adapter->vsi.state/

For debugfs, we modify the printing so that we can display chunks of the
state value on new lines. This ensures that we can print the entire set
of state values. Additionally, we now print them as 08lx to ensure that
they display nicely.

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, 6 insertions, 2 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index ac2a4850a30b..6eb21abdc60e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -145,6 +145,8 @@ enum i40e_state_t {
 	__I40E_RESET_FAILED,
 	__I40E_PORT_SUSPENDED,
 	__I40E_VF_DISABLE,
+	/* This must be last as it determines the size of the BITMAP */
+	__I40E_STATE_SIZE__,
 };
 
 /* VSI state flags */
@@ -155,6 +157,8 @@ enum i40e_vsi_state_t {
 	__I40E_VSI_OVERFLOW_PROMISC,
 	__I40E_VSI_REINIT_REQUESTED,
 	__I40E_VSI_DOWN_REQUESTED,
+	/* This must be last as it determines the size of the BITMAP */
+	__I40E_VSI_STATE_SIZE__,
 };
 
 enum i40e_interrupt_policy {
@@ -330,7 +334,7 @@ struct i40e_flex_pit {
 struct i40e_pf {
 	struct pci_dev *pdev;
 	struct i40e_hw hw;
-	unsigned long state;
+	DECLARE_BITMAP(state, __I40E_STATE_SIZE__);
 	struct msix_entry *msix_entries;
 	bool fc_autoneg_status;
 
@@ -601,7 +605,7 @@ struct i40e_vsi {
 	bool stat_offsets_loaded;
 
 	u32 current_netdev_flags;
-	unsigned long state;
+	DECLARE_BITMAP(state, __I40E_VSI_STATE_SIZE__);
 #define I40E_VSI_FLAG_FILTER_CHANGED	BIT(0)
 #define I40E_VSI_FLAG_VEB_OWNER		BIT(1)
 	unsigned long flags;