ice: Increase mailbox receive queue length to maximum

Currently the PF's mailbox receive queue is only 512 entries. This fine,
but considering that all VF's mailbox send queues funnel into the PF's
single mailbox receive queue, let's increase it to the maximum size. This
will help prevent any possible bottleneck/slowdown occurring from the PF's
mailbox receive queue being full.
Signed-off-by: Lukasz Czapnik <lukasz.czapnik@intel.com>
Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ice/ice.h

@@ -60,7 +60,6 @@ extern const char ice_drv_ver[];
 #define ICE_INT_NAME_STR_LEN	(IFNAMSIZ + 16)
 #define ICE_AQ_LEN		64
 #define ICE_MBXSQ_LEN		64
-#define ICE_MBXRQ_LEN		512
 #define ICE_MIN_MSIX		2
 #define ICE_NO_VSI		0xffff
 #define ICE_VSI_MAP_CONTIG	0

drivers/net/ethernet/intel/ice/ice_main.c

@@ -1518,7 +1518,7 @@ static void ice_set_ctrlq_len(struct ice_hw *hw)
 	hw->adminq.num_sq_entries = ICE_AQ_LEN;
 	hw->adminq.rq_buf_size = ICE_AQ_MAX_BUF_LEN;
 	hw->adminq.sq_buf_size = ICE_AQ_MAX_BUF_LEN;
-	hw->mailboxq.num_rq_entries = ICE_MBXRQ_LEN;
+	hw->mailboxq.num_rq_entries = PF_MBX_ARQLEN_ARQLEN_M;
 	hw->mailboxq.num_sq_entries = ICE_MBXSQ_LEN;
 	hw->mailboxq.rq_buf_size = ICE_MBXQ_MAX_BUF_LEN;
 	hw->mailboxq.sq_buf_size = ICE_MBXQ_MAX_BUF_LEN;