ice: Replace ice specific DSCP mapping num with a kernel define

Replace ice driver specific DSCP mapping number defines
ICE_DSCP_NUM_VAL and IIDC_MAX_DSCP_MAPPING with
an equivalent kernel define DSCP_MAX.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Author: tatyana-en

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

@@ -1288,7 +1288,7 @@ ice_add_dscp_up_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
 	tlv->ouisubtype = htonl(ouisubtype);
 
 	/* bytes 0 - 63 - IPv4 DSCP2UP LUT */
-	for (i = 0; i < ICE_DSCP_NUM_VAL; i++) {
+	for (i = 0; i < DSCP_MAX; i++) {
 		/* IPv4 mapping */
 		buf[i] = dcbcfg->dscp_map[i];
 		/* IPv6 mapping */

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

@@ -754,7 +754,7 @@ static int ice_dcbnl_setapp(struct net_device *netdev, struct dcb_app *app)
 	if (!ice_is_feature_supported(pf, ICE_F_DSCP))
 		return -EOPNOTSUPP;
 
-	if (app->protocol >= ICE_DSCP_NUM_VAL) {
+	if (app->protocol >= DSCP_MAX) {
 		netdev_err(netdev, "DSCP value 0x%04X out of range\n",
 			   app->protocol);
 		return -EINVAL;
@@ -931,7 +931,7 @@ static int ice_dcbnl_delapp(struct net_device *netdev, struct dcb_app *app)
 	/* if the last DSCP mapping just got deleted, need to switch
 	 * to L2 VLAN QoS mode
 	 */
-	if (bitmap_empty(new_cfg->dscp_mapped, ICE_DSCP_NUM_VAL) &&
+	if (bitmap_empty(new_cfg->dscp_mapped, DSCP_MAX) &&
 	    new_cfg->pfc_mode == ICE_QOS_MODE_DSCP) {
 		ret = ice_aq_set_pfc_mode(&pf->hw,
 					  ICE_AQC_PFC_VLAN_BASED_PFC,

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

@@ -225,7 +225,7 @@ void ice_get_qos_params(struct ice_pf *pf, struct iidc_rdma_qos_params *qos)
 
 	qos->pfc_mode = dcbx_cfg->pfc_mode;
 	if (qos->pfc_mode == IIDC_DSCP_PFC_MODE)
-		for (i = 0; i < IIDC_MAX_DSCP_MAPPING; i++)
+		for (i = 0; i < DSCP_MAX; i++)
 			qos->dscp_map[i] = dcbx_cfg->dscp_map[i];
 }
 EXPORT_SYMBOL_GPL(ice_get_qos_params);

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

@@ -19,6 +19,7 @@
 #include "ice_vlan_mode.h"
 #include "ice_fwlog.h"
 #include <linux/wait.h>
+#include <net/dscp.h>
 
 static inline bool ice_is_tc_ena(unsigned long bitmap, u8 tc)
 {
@@ -695,7 +696,6 @@ struct ice_dcb_app_priority_table {
 
 #define ICE_MAX_USER_PRIORITY	8
 #define ICE_DCBX_MAX_APPS	64
-#define ICE_DSCP_NUM_VAL	64
 #define ICE_LLDPDU_SIZE		1500
 #define ICE_TLV_STATUS_OPER	0x1
 #define ICE_TLV_STATUS_SYNC	0x2
@@ -718,9 +718,9 @@ struct ice_dcbx_cfg {
 	u8 pfc_mode;
 	struct ice_dcb_app_priority_table app[ICE_DCBX_MAX_APPS];
 	/* when DSCP mapping defined by user set its bit to 1 */
-	DECLARE_BITMAP(dscp_mapped, ICE_DSCP_NUM_VAL);
+	DECLARE_BITMAP(dscp_mapped, DSCP_MAX);
 	/* array holding DSCP -> UP/TC values for DSCP L3 QoS mode */
-	u8 dscp_map[ICE_DSCP_NUM_VAL];
+	u8 dscp_map[DSCP_MAX];
 	u8 dcbx_mode;
 #define ICE_DCBX_MODE_CEE	0x1
 #define ICE_DCBX_MODE_IEEE	0x2

include/linux/net/intel/iidc_rdma.h

@@ -10,6 +10,7 @@
 #include <linux/if_ether.h>
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
+#include <net/dscp.h>
 
 enum iidc_rdma_event_type {
 	IIDC_RDMA_EVENT_BEFORE_MTU_CHANGE,
@@ -32,7 +33,6 @@ enum iidc_rdma_protocol {
 };
 
 #define IIDC_MAX_USER_PRIORITY		8
-#define IIDC_MAX_DSCP_MAPPING		64
 #define IIDC_DSCP_PFC_MODE		0x1
 
 /* Struct to hold per RDMA Qset info */
@@ -63,7 +63,7 @@ struct iidc_rdma_qos_params {
 	u8 vport_priority_type;
 	u8 num_tc;
 	u8 pfc_mode;
-	u8 dscp_map[IIDC_MAX_DSCP_MAPPING];
+	u8 dscp_map[DSCP_MAX];
 };
 
 struct iidc_rdma_event {