bnx2x: PFC support for 578xx

Add supoprt for 3 COSes for 578xx devices.
Fix HW configuration for PFC feature according to new HSI in link layer.
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@conan.davemloft.net>

drivers/net/bnx2x/bnx2x_dcb.h

@@ -27,22 +27,30 @@ struct bnx2x_dcbx_app_params {
 	u32 traffic_type_priority[LLFC_DRIVER_TRAFFIC_TYPE_MAX];
 };
 
-#define E2_NUM_OF_COS			2
-#define BNX2X_DCBX_COS_NOT_STRICT	0
-#define BNX2X_DCBX_COS_LOW_STRICT	1
-#define BNX2X_DCBX_COS_HIGH_STRICT	2
+#define DCBX_COS_MAX_NUM_E2	DCBX_E2E3_MAX_NUM_COS
+/* bnx2x currently limits numbers of supported COSes to 3 to be extended to 6 */
+#define BNX2X_MAX_COS_SUPPORT	3
+#define DCBX_COS_MAX_NUM_E3B0	BNX2X_MAX_COS_SUPPORT
+#define DCBX_COS_MAX_NUM	BNX2X_MAX_COS_SUPPORT
 
 struct bnx2x_dcbx_cos_params {
 	u32	bw_tbl;
 	u32	pri_bitmask;
+	/*
+	 * strict priority: valid values are 0..5; 0 is highest priority.
+	 * There can't be two COSes with the same priority.
+	 */
 	u8	strict;
+#define BNX2X_DCBX_STRICT_INVALID			DCBX_COS_MAX_NUM
+#define BNX2X_DCBX_STRICT_COS_HIGHEST			0
+#define BNX2X_DCBX_STRICT_COS_NEXT_LOWER_PRI(sp)	((sp) + 1)
 	u8	pauseable;
 };
 
 struct bnx2x_dcbx_pg_params {
 	u32 enabled;
 	u8 num_of_cos; /* valid COS entries */
-	struct bnx2x_dcbx_cos_params	cos_params[E2_NUM_OF_COS];
+	struct bnx2x_dcbx_cos_params	cos_params[DCBX_COS_MAX_NUM];
 };
 
 struct bnx2x_dcbx_pfc_params {
@@ -134,7 +142,7 @@ struct cos_entry_help_data {
 };
 
 struct cos_help_data {
-	struct cos_entry_help_data	data[E2_NUM_OF_COS];
+	struct cos_entry_help_data	data[DCBX_COS_MAX_NUM];
 	u8				num_of_cos;
 };
 
@@ -150,6 +158,8 @@ struct cos_help_data {
 				((pg_pri) & (DCBX_PFC_PRI_PAUSE_MASK(bp)))
 #define DCBX_PFC_PRI_GET_NON_PAUSE(bp, pg_pri)	\
 			(DCBX_PFC_PRI_NON_PAUSE_MASK(bp) & (pg_pri))
+#define DCBX_IS_PFC_PRI_SOME_PAUSE(bp, pg_pri)	\
+			(0 != DCBX_PFC_PRI_GET_PAUSE(bp, pg_pri))
 #define IS_DCBX_PFC_PRI_ONLY_PAUSE(bp, pg_pri)	\
 			(pg_pri == DCBX_PFC_PRI_GET_PAUSE((bp), (pg_pri)))
 #define IS_DCBX_PFC_PRI_ONLY_NON_PAUSE(bp, pg_pri)\
@@ -172,7 +182,6 @@ struct pg_help_data {
 
 /* forward DCB/PFC related declarations */
 struct bnx2x;
-void bnx2x_dcb_init_intmem_pfc(struct bnx2x *bp);
 void bnx2x_dcbx_update(struct work_struct *work);
 void bnx2x_dcbx_init_params(struct bnx2x *bp);
 void bnx2x_dcbx_set_state(struct bnx2x *bp, bool dcb_on, u32 dcbx_enabled);