ice: track interrupt vectors with xarray

Replace custom interrupt tracker with generic xarray data structure.
Remove all code responsible for searching for a new entry with xa_alloc,
which always tries to allocate at the lowes possible index. As a result
driver is always using a contiguous region of the MSIX vector table.

New tracker keeps ice_irq_entry entries in xarray as opaque for the rest
of the driver hiding the entry details from the caller.

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Piotr Raczynski <piotr.raczynski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 1 insertions, 8 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index d8dde291491e..8541d986ec7f 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -104,7 +104,6 @@
 #define ICE_Q_WAIT_RETRY_LIMIT	10
 #define ICE_Q_WAIT_MAX_RETRY	(5 * ICE_Q_WAIT_RETRY_LIMIT)
 #define ICE_MAX_LG_RSS_QS	256
-#define ICE_RES_VALID_BIT	0x8000
 #define ICE_INVAL_Q_INDEX	0xffff
 
 #define ICE_MAX_RXQS_PER_TC		256	/* Used when setting VSI context per TC Rx queues */
@@ -242,12 +241,6 @@ struct ice_tc_cfg {
 	struct ice_tc_info tc_info[ICE_MAX_TRAFFIC_CLASS];
 };
 
-struct ice_res_tracker {
-	u16 num_entries;
-	u16 end;
-	u16 list[];
-};
-
 struct ice_qs_cfg {
 	struct mutex *qs_mutex;  /* will be assigned to &pf->avail_q_mutex */
 	unsigned long *pf_map;
@@ -536,7 +529,7 @@ struct ice_pf {
 
 	/* OS reserved IRQ details */
 	struct msix_entry *msix_entries;
-	struct ice_res_tracker *irq_tracker;
+	struct ice_irq_tracker irq_tracker;
 	/* First MSIX vector used by SR-IOV VFs. Calculated by subtracting the
 	 * number of MSIX vectors needed for all SR-IOV VFs from the number of
 	 * MSIX vectors allowed on this PF.