bnx2x: add DCB support

Adding DCB initialization and handling on 57712 FW/HW
Signed-off-by: NDmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: NShmulik Ravid-Rabinovitz <shmulikr@broadcom.com>
Signed-off-by: NEilon Greenstein <eilong@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bnx2x/Makefile

@@ -4,4 +4,4 @@
 
 obj-$(CONFIG_BNX2X) += bnx2x.o
 
-bnx2x-objs := bnx2x_main.o bnx2x_link.o bnx2x_cmn.o bnx2x_ethtool.o bnx2x_stats.o
+bnx2x-objs := bnx2x_main.o bnx2x_link.o bnx2x_cmn.o bnx2x_ethtool.o bnx2x_stats.o bnx2x_dcb.o

drivers/net/bnx2x/bnx2x.h

@@ -50,6 +50,7 @@
 #include "bnx2x_fw_defs.h"
 #include "bnx2x_hsi.h"
 #include "bnx2x_link.h"
+#include "bnx2x_dcb.h"
 #include "bnx2x_stats.h"
 
 /* error/debug prints */
@@ -820,6 +821,8 @@ struct bnx2x_slowpath {
 
 	u32				wb_comp;
 	u32				wb_data[4];
+	/* pfc configuration for DCBX ramrod */
+	struct flow_control_configuration pfc_config;
 };
 
 #define bnx2x_sp(bp, var)		(&bp->slowpath->var)
@@ -1180,6 +1183,18 @@ struct bnx2x {
 
 	char			fw_ver[32];
 	const struct firmware	*firmware;
+	/* LLDP params */
+	struct bnx2x_config_lldp_params		lldp_config_params;
+
+	/* DCBX params */
+	struct bnx2x_config_dcbx_params		dcbx_config_params;
+
+	struct bnx2x_dcbx_port_params		dcbx_port_params;
+	int					dcb_version;
+
+	/* DCBX Negotation results */
+	struct dcbx_features			dcbx_local_feat;
+	u32					dcbx_error;
 };
 
 /**

drivers/net/bnx2x/bnx2x_cmn.c

@@ -1371,6 +1371,8 @@ int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
 		}
 	}
 
+	bnx2x_dcbx_init(bp);
+
 	bp->state = BNX2X_STATE_OPENING_WAIT4_PORT;
 
 	rc = bnx2x_func_start(bp);

drivers/net/bnx2x/bnx2x_cmn.h

@@ -323,6 +323,13 @@ int bnx2x_func_start(struct bnx2x *bp);
  */
 void bnx2x_ilt_set_info(struct bnx2x *bp);
 
+/**
+ * Inintialize dcbx protocol
+ *
+ * @param bp
+ */
+void bnx2x_dcbx_init(struct bnx2x *bp);
+
 /**
  * Set power state to the requested value. Currently only D0 and
  * D3hot are supported.

drivers/net/bnx2x/bnx2x_dcb.h

+/* bnx2x_dcb.h: Broadcom Everest network driver.
+ *
+ * Copyright 2009-2010 Broadcom Corporation
+ *
+ * Unless you and Broadcom execute a separate written software license
+ * agreement governing use of this software, this software is licensed to you
+ * under the terms of the GNU General Public License version 2, available
+ * at http://www.gnu.org/licenses/old-licenses/gpl-2.0.html (the "GPL").
+ *
+ * Notwithstanding the above, under no circumstances may you combine this
+ * software in any way with any other Broadcom software provided under a
+ * license other than the GPL, without Broadcom's express prior written
+ * consent.
+ *
+ * Maintained by: Eilon Greenstein <eilong@broadcom.com>
+ * Written by: Dmitry Kravkov
+ *
+ */
+#ifndef BNX2X_DCB_H
+#define BNX2X_DCB_H
+
+#include "bnx2x_hsi.h"
+
+#define LLFC_DRIVER_TRAFFIC_TYPE_MAX 3 /* NW, iSCSI, FCoE */
+struct bnx2x_dcbx_app_params {
+	u32 enabled;
+	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
+
+struct bnx2x_dcbx_cos_params {
+	u32	bw_tbl;
+	u32	pri_bitmask;
+	u8	strict;
+	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_pfc_params {
+	u32 enabled;
+	u32 priority_non_pauseable_mask;
+};
+
+struct bnx2x_dcbx_port_params {
+	u32 dcbx_enabled;
+	struct bnx2x_dcbx_pfc_params pfc;
+	struct bnx2x_dcbx_pg_params  ets;
+	struct bnx2x_dcbx_app_params app;
+};
+
+#define BNX2X_DCBX_CONFIG_INV_VALUE			(0xFFFFFFFF)
+#define BNX2X_DCBX_OVERWRITE_SETTINGS_DISABLE		0
+#define BNX2X_DCBX_OVERWRITE_SETTINGS_ENABLE		1
+#define BNX2X_DCBX_OVERWRITE_SETTINGS_INVALID	(BNX2X_DCBX_CONFIG_INV_VALUE)
+
+/*******************************************************************************
+ * LLDP protocol configuration parameters.
+ ******************************************************************************/
+struct bnx2x_config_lldp_params {
+	u32 overwrite_settings;
+	u32 msg_tx_hold;
+	u32 msg_fast_tx;
+	u32 tx_credit_max;
+	u32 msg_tx_interval;
+	u32 tx_fast;
+};
+
+struct bnx2x_admin_priority_app_table {
+		u32 valid;
+		u32 priority;
+#define INVALID_TRAFFIC_TYPE_PRIORITY	(0xFFFFFFFF)
+		u32 traffic_type;
+#define TRAFFIC_TYPE_ETH		0
+#define TRAFFIC_TYPE_PORT		1
+		u32 app_id;
+};
+
+/*******************************************************************************
+ * DCBX protocol configuration parameters.
+ ******************************************************************************/
+struct bnx2x_config_dcbx_params {
+	u32 dcb_enable;
+	u32 admin_dcbx_enable;
+	u32 overwrite_settings;
+	u32 admin_dcbx_version;
+	u32 admin_ets_enable;
+	u32 admin_pfc_enable;
+	u32 admin_tc_supported_tx_enable;
+	u32 admin_ets_configuration_tx_enable;
+	u32 admin_ets_recommendation_tx_enable;
+	u32 admin_pfc_tx_enable;
+	u32 admin_application_priority_tx_enable;
+	u32 admin_ets_willing;
+	u32 admin_ets_reco_valid;
+	u32 admin_pfc_willing;
+	u32 admin_app_priority_willing;
+	u32 admin_configuration_bw_precentage[8];
+	u32 admin_configuration_ets_pg[8];
+	u32 admin_recommendation_bw_precentage[8];
+	u32 admin_recommendation_ets_pg[8];
+	u32 admin_pfc_bitmap;
+	struct bnx2x_admin_priority_app_table admin_priority_app_table[4];
+	u32 admin_default_priority;
+};
+
+#define GET_FLAGS(flags, bits)		((flags) & (bits))
+#define SET_FLAGS(flags, bits)		((flags) |= (bits))
+#define RESET_FLAGS(flags, bits)	((flags) &= ~(bits))
+
+enum {
+	DCBX_READ_LOCAL_MIB,
+	DCBX_READ_REMOTE_MIB
+};
+
+#define ETH_TYPE_FCOE		(0x8906)
+#define TCP_PORT_ISCSI		(0xCBC)
+
+#define PFC_VALUE_FRAME_SIZE				(512)
+#define PFC_QUANTA_IN_NANOSEC_FROM_SPEED_MEGA(mega_speed)  \
+				((1000 * PFC_VALUE_FRAME_SIZE)/(mega_speed))
+
+#define PFC_BRB1_REG_HIGH_LLFC_LOW_THRESHOLD			130
+#define PFC_BRB1_REG_HIGH_LLFC_HIGH_THRESHOLD			170
+
+
+
+struct cos_entry_help_data {
+	u32			pri_join_mask;
+	u32			cos_bw;
+	u8			strict;
+	bool			pausable;
+};
+
+struct cos_help_data {
+	struct cos_entry_help_data	data[E2_NUM_OF_COS];
+	u8				num_of_cos;
+};
+
+#define DCBX_ILLEGAL_PG				(0xFF)
+#define DCBX_PFC_PRI_MASK			(0xFF)
+#define DCBX_STRICT_PRIORITY			(15)
+#define DCBX_INVALID_COS_BW			(0xFFFFFFFF)
+#define DCBX_PFC_PRI_NON_PAUSE_MASK(bp)		\
+			((bp)->dcbx_port_params.pfc.priority_non_pauseable_mask)
+#define DCBX_PFC_PRI_PAUSE_MASK(bp)		\
+					((u8)~DCBX_PFC_PRI_NON_PAUSE_MASK(bp))
+#define DCBX_PFC_PRI_GET_PAUSE(bp, pg_pri)	\
+				((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 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)\
+			((pg_pri) == DCBX_PFC_PRI_GET_NON_PAUSE((bp), (pg_pri)))
+#define IS_DCBX_PFC_PRI_MIX_PAUSE(bp, pg_pri)	\
+			(!(IS_DCBX_PFC_PRI_ONLY_NON_PAUSE((bp), (pg_pri)) || \
+			 IS_DCBX_PFC_PRI_ONLY_PAUSE((bp), (pg_pri))))
+
+
+struct pg_entry_help_data {
+	u8	num_of_dif_pri;
+	u8	pg;
+	u32	pg_priority;
+};
+
+struct pg_help_data {
+	struct pg_entry_help_data	data[LLFC_DRIVER_TRAFFIC_TYPE_MAX];
+	u8				num_of_pg;
+};
+
+/* 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);
+
+enum {
+	BNX2X_DCBX_STATE_NEG_RECEIVED = 0x1,
+	BNX2X_DCBX_STATE_TX_PAUSED = 0x2,
+	BNX2X_DCBX_STATE_TX_RELEASED = 0x4
+};
+void bnx2x_dcbx_set_params(struct bnx2x *bp, u32 state);
+
+#endif /* BNX2X_DCB_H */

drivers/net/bnx2x/bnx2x_hsi.h

@@ -684,7 +684,7 @@ struct shm_dev_info {						    /* size */
 #define E1VN_MAX			1
 #define E1HVN_MAX			4
 
-
+#define E2_VF_MAX			64
 /* This value (in milliseconds) determines the frequency of the driver
  * issuing the PULSE message code.  The firmware monitors this periodic
  * pulse to determine when to switch to an OS-absent mode. */
@@ -820,6 +820,8 @@ struct drv_func_mb {
 #define DRV_MSG_CODE_VRFY_SPECIFIC_PHY_OPT_MDL	    0xa1000000
 #define REQ_BC_VER_4_VRFY_SPECIFIC_PHY_OPT_MDL	    0x00050234
 
+#define DRV_MSG_CODE_DCBX_ADMIN_PMF_MSG			0xb0000000
+#define DRV_MSG_CODE_DCBX_PMF_DRV_OK			0xb2000000
 #define DRV_MSG_CODE_SET_MF_BW				0xe0000000
 #define REQ_BC_VER_4_SET_MF_BW				0x00060202
 #define DRV_MSG_CODE_SET_MF_BW_ACK			0xe1000000
@@ -905,6 +907,8 @@ struct drv_func_mb {
 #define DRV_STATUS_DCC_RESERVED1			0x00000800
 #define DRV_STATUS_DCC_SET_PROTOCOL			0x00001000
 #define DRV_STATUS_DCC_SET_PRIORITY			0x00002000
+#define DRV_STATUS_DCBX_EVENT_MASK			0x000f0000
+#define DRV_STATUS_DCBX_NEGOTIATION_RESULTS		0x00010000
 
 	u32 virt_mac_upper;
 #define VIRT_MAC_SIGN_MASK				0xffff0000
@@ -1089,6 +1093,251 @@ struct fw_flr_mb {
 	struct	fw_flr_ack ack;
 };
 
+/**** SUPPORT FOR SHMEM ARRRAYS ***
+ * The SHMEM HSI is aligned on 32 bit boundaries which makes it difficult to
+ * define arrays with storage types smaller then unsigned dwords.
+ * The macros below add generic support for SHMEM arrays with numeric elements
+ * that can span 2,4,8 or 16 bits. The array underlying type is a 32 bit dword
+ * array with individual bit-filed elements accessed using shifts and masks.
+ *
+ */
+
+/* eb is the bitwidth of a single element */
+#define SHMEM_ARRAY_MASK(eb)		((1<<(eb))-1)
+#define SHMEM_ARRAY_ENTRY(i, eb)	((i)/(32/(eb)))
+
+/* the bit-position macro allows the used to flip the order of the arrays
+ * elements on a per byte or word boundary.
+ *
+ * example: an array with 8 entries each 4 bit wide. This array will fit into
+ * a single dword. The diagrmas below show the array order of the nibbles.
+ *
+ * SHMEM_ARRAY_BITPOS(i, 4, 4) defines the stadard ordering:
+ *
+ *		|		|		|		|
+ *   0	|   1	|   2	|   3	|   4	|   5	|   6	|   7	|
+ *		|		|		|		|
+ *
+ * SHMEM_ARRAY_BITPOS(i, 4, 8) defines a flip ordering per byte:
+ *
+ *		|		|		|		|
+ *   1	|   0	|   3	|   2	|   5	|   4	|   7	|   6	|
+ *		|		|		|		|
+ *
+ * SHMEM_ARRAY_BITPOS(i, 4, 16) defines a flip ordering per word:
+ *
+ *		|		|		|		|
+ *   3	|   2	|   1	|   0	|   7	|   6	|   5	|   4	|
+ *		|		|		|		|
+ */
+#define SHMEM_ARRAY_BITPOS(i, eb, fb)	\
+	((((32/(fb)) - 1 - ((i)/((fb)/(eb))) % (32/(fb))) * (fb)) + \
+	(((i)%((fb)/(eb))) * (eb)))
+
+#define SHMEM_ARRAY_GET(a, i, eb, fb)					   \
+	((a[SHMEM_ARRAY_ENTRY(i, eb)] >> SHMEM_ARRAY_BITPOS(i, eb, fb)) &  \
+	SHMEM_ARRAY_MASK(eb))
+
+#define SHMEM_ARRAY_SET(a, i, eb, fb, val)				   \
+do {									   \
+	a[SHMEM_ARRAY_ENTRY(i, eb)] &= ~(SHMEM_ARRAY_MASK(eb) <<	   \
+	SHMEM_ARRAY_BITPOS(i, eb, fb));				   \
+	a[SHMEM_ARRAY_ENTRY(i, eb)] |= (((val) & SHMEM_ARRAY_MASK(eb)) <<  \
+	SHMEM_ARRAY_BITPOS(i, eb, fb));				   \
+} while (0)
+
+
+/****START OF DCBX STRUCTURES DECLARATIONS****/
+#define DCBX_MAX_NUM_PRI_PG_ENTRIES	8
+#define DCBX_PRI_PG_BITWIDTH		4
+#define DCBX_PRI_PG_FBITS		8
+#define DCBX_PRI_PG_GET(a, i)		\
+	SHMEM_ARRAY_GET(a, i, DCBX_PRI_PG_BITWIDTH, DCBX_PRI_PG_FBITS)
+#define DCBX_PRI_PG_SET(a, i, val)	\
+	SHMEM_ARRAY_SET(a, i, DCBX_PRI_PG_BITWIDTH, DCBX_PRI_PG_FBITS, val)
+#define DCBX_MAX_NUM_PG_BW_ENTRIES	8
+#define DCBX_BW_PG_BITWIDTH		8
+#define DCBX_PG_BW_GET(a, i)		\
+	SHMEM_ARRAY_GET(a, i, DCBX_BW_PG_BITWIDTH, DCBX_BW_PG_BITWIDTH)
+#define DCBX_PG_BW_SET(a, i, val)	\
+	SHMEM_ARRAY_SET(a, i, DCBX_BW_PG_BITWIDTH, DCBX_BW_PG_BITWIDTH, val)
+#define DCBX_STRICT_PRI_PG		15
+#define DCBX_MAX_APP_PROTOCOL		16
+#define FCOE_APP_IDX			0
+#define ISCSI_APP_IDX			1
+#define PREDEFINED_APP_IDX_MAX		2
+
+struct dcbx_ets_feature {
+	u32 enabled;
+	u32  pg_bw_tbl[2];
+	u32  pri_pg_tbl[1];
+};
+
+struct dcbx_pfc_feature {
+#ifdef __BIG_ENDIAN
+	u8 pri_en_bitmap;
+#define DCBX_PFC_PRI_0 0x01
+#define DCBX_PFC_PRI_1 0x02
+#define DCBX_PFC_PRI_2 0x04
+#define DCBX_PFC_PRI_3 0x08
+#define DCBX_PFC_PRI_4 0x10
+#define DCBX_PFC_PRI_5 0x20
+#define DCBX_PFC_PRI_6 0x40
+#define DCBX_PFC_PRI_7 0x80
+	u8 pfc_caps;
+	u8 reserved;
+	u8 enabled;
+#elif defined(__LITTLE_ENDIAN)
+	u8 enabled;
+	u8 reserved;
+	u8 pfc_caps;
+	u8 pri_en_bitmap;
+#define DCBX_PFC_PRI_0 0x01
+#define DCBX_PFC_PRI_1 0x02
+#define DCBX_PFC_PRI_2 0x04
+#define DCBX_PFC_PRI_3 0x08
+#define DCBX_PFC_PRI_4 0x10
+#define DCBX_PFC_PRI_5 0x20
+#define DCBX_PFC_PRI_6 0x40
+#define DCBX_PFC_PRI_7 0x80
+#endif
+};
+
+struct dcbx_app_priority_entry {
+#ifdef __BIG_ENDIAN
+	u16	app_id;
+	u8	pri_bitmap;
+	u8	appBitfield;
+#define DCBX_APP_ENTRY_VALID	     0x01
+#define DCBX_APP_ENTRY_SF_MASK	     0x30
+#define DCBX_APP_ENTRY_SF_SHIFT	     4
+#define DCBX_APP_SF_ETH_TYPE	     0x10
+#define DCBX_APP_SF_PORT	     0x20
+#elif defined(__LITTLE_ENDIAN)
+	u8 appBitfield;
+#define DCBX_APP_ENTRY_VALID	     0x01
+#define DCBX_APP_ENTRY_SF_MASK	     0x30
+#define DCBX_APP_ENTRY_SF_SHIFT	     4
+#define DCBX_APP_SF_ETH_TYPE	     0x10
+#define DCBX_APP_SF_PORT	     0x20
+	u8	pri_bitmap;
+	u16	app_id;
+#endif
+};
+
+struct dcbx_app_priority_feature {
+#ifdef __BIG_ENDIAN
+	u8 reserved;
+	u8 default_pri;
+	u8 tc_supported;
+	u8 enabled;
+#elif defined(__LITTLE_ENDIAN)
+	u8 enabled;
+	u8 tc_supported;
+	u8 default_pri;
+	u8 reserved;
+#endif
+	struct dcbx_app_priority_entry  app_pri_tbl[DCBX_MAX_APP_PROTOCOL];
+};
+
+struct dcbx_features {
+	struct dcbx_ets_feature ets;
+	struct dcbx_pfc_feature pfc;
+	struct dcbx_app_priority_feature app;
+};
+
+struct lldp_params {
+#ifdef __BIG_ENDIAN
+	u8	msg_fast_tx_interval;
+	u8	msg_tx_hold;
+	u8	msg_tx_interval;
+	u8	admin_status;
+#define LLDP_TX_ONLY  0x01
+#define LLDP_RX_ONLY  0x02
+#define LLDP_TX_RX    0x03
+#define LLDP_DISABLED 0x04
+	u8	reserved1;
+	u8	tx_fast;
+	u8	tx_crd_max;
+	u8	tx_crd;
+#elif defined(__LITTLE_ENDIAN)
+	u8	admin_status;
+#define LLDP_TX_ONLY  0x01
+#define LLDP_RX_ONLY  0x02
+#define LLDP_TX_RX    0x03
+#define LLDP_DISABLED 0x04
+	u8	msg_tx_interval;
+	u8	msg_tx_hold;
+	u8	msg_fast_tx_interval;
+	u8	tx_crd;
+	u8	tx_crd_max;
+	u8	tx_fast;
+	u8	reserved1;
+#endif
+#define REM_CHASSIS_ID_STAT_LEN	4
+#define REM_PORT_ID_STAT_LEN 4
+	u32 peer_chassis_id[REM_CHASSIS_ID_STAT_LEN];
+	u32 peer_port_id[REM_PORT_ID_STAT_LEN];
+};
+
+struct lldp_dcbx_stat {
+#define LOCAL_CHASSIS_ID_STAT_LEN 2
+#define LOCAL_PORT_ID_STAT_LEN 2
+	u32 local_chassis_id[LOCAL_CHASSIS_ID_STAT_LEN];
+	u32 local_port_id[LOCAL_PORT_ID_STAT_LEN];
+	u32 num_tx_dcbx_pkts;
+	u32 num_rx_dcbx_pkts;
+};
+
+struct lldp_admin_mib {
+	u32	ver_cfg_flags;
+#define DCBX_ETS_CONFIG_TX_ENABLED	0x00000001
+#define DCBX_PFC_CONFIG_TX_ENABLED	0x00000002
+#define DCBX_APP_CONFIG_TX_ENABLED	0x00000004
+#define DCBX_ETS_RECO_TX_ENABLED	0x00000008
+#define DCBX_ETS_RECO_VALID		0x00000010
+#define DCBX_ETS_WILLING		0x00000020
+#define DCBX_PFC_WILLING		0x00000040
+#define DCBX_APP_WILLING		0x00000080
+#define DCBX_VERSION_CEE		0x00000100
+#define DCBX_VERSION_IEEE		0x00000200
+#define DCBX_DCBX_ENABLED		0x00000400
+#define DCBX_CEE_VERSION_MASK		0x0000f000
+#define DCBX_CEE_VERSION_SHIFT		12
+#define DCBX_CEE_MAX_VERSION_MASK	0x000f0000
+#define DCBX_CEE_MAX_VERSION_SHIFT	16
+	struct dcbx_features	features;
+};
+
+struct lldp_remote_mib {
+	u32 prefix_seq_num;
+	u32 flags;
+#define DCBX_ETS_TLV_RX	    0x00000001
+#define DCBX_PFC_TLV_RX	    0x00000002
+#define DCBX_APP_TLV_RX	    0x00000004
+#define DCBX_ETS_RX_ERROR   0x00000010
+#define DCBX_PFC_RX_ERROR   0x00000020
+#define DCBX_APP_RX_ERROR   0x00000040
+#define DCBX_ETS_REM_WILLING	0x00000100
+#define DCBX_PFC_REM_WILLING	0x00000200
+#define DCBX_APP_REM_WILLING	0x00000400
+#define DCBX_REMOTE_ETS_RECO_VALID  0x00001000
+	struct dcbx_features features;
+	u32 suffix_seq_num;
+};
+
+struct lldp_local_mib {
+	u32 prefix_seq_num;
+	u32 error;
+#define DCBX_LOCAL_ETS_ERROR	 0x00000001
+#define DCBX_LOCAL_PFC_ERROR	 0x00000002
+#define DCBX_LOCAL_APP_ERROR	 0x00000004
+#define DCBX_LOCAL_PFC_MISMATCH	 0x00000010
+#define DCBX_LOCAL_APP_MISMATCH	 0x00000020
+	struct dcbx_features   features;
+	u32 suffix_seq_num;
+};
+/***END OF DCBX STRUCTURES DECLARATIONS***/
 
 struct shmem2_region {
 
@@ -1112,7 +1361,12 @@ struct shmem2_region {
 #define SHMEM_MF_CFG_ADDR_NONE			    0x00000000
 
 	struct fw_flr_mb flr_mb;
-	u32	reserved[3];
+	u32	dcbx_lldp_params_offset;
+#define SHMEM_LLDP_DCBX_PARAMS_NONE		    0x00000000
+	u32	dcbx_neg_res_offset;
+#define SHMEM_DCBX_NEG_RES_NONE			    0x00000000
+	u32	dcbx_remote_mib_offset;
+#define SHMEM_DCBX_REMOTE_MIB_NONE		    0x00000000
 	/*
 	 * The other shmemX_base_addr holds the other path's shmem address
 	 * required for example in case of common phy init, or for path1 to know
@@ -1121,6 +1375,10 @@ struct shmem2_region {
 	 */
 	u32 other_shmem_base_addr;
 	u32 other_shmem2_base_addr;
+	u32	reserved1[E2_VF_MAX / 32];
+	u32	reserved2[E2_FUNC_MAX][E2_VF_MAX / 32];
+	u32	dcbx_lldp_dcbx_stat_offset;
+#define SHMEM_LLDP_DCBX_STAT_NONE		   0x00000000
 };
 
 
@@ -3022,6 +3280,25 @@ struct fairness_vars_per_vn {
 };
 
 
+/*
+ * The data for flow control configuration
+ */
+struct flow_control_configuration {
+	struct priority_cos
+		traffic_type_to_priority_cos[MAX_PFC_TRAFFIC_TYPES];
+#if defined(__BIG_ENDIAN)
+	u16 reserved1;
+	u8 dcb_version;
+	u8 dcb_enabled;
+#elif defined(__LITTLE_ENDIAN)
+	u8 dcb_enabled;
+	u8 dcb_version;
+	u16 reserved1;
+#endif
+	u32 reserved2;
+};
+
+
 /*
  * FW version stored in the Xstorm RAM
  */

drivers/net/bnx2x/bnx2x_link.h

@@ -216,6 +216,7 @@ struct link_params {
 
 	u32 feature_config_flags;
 #define FEATURE_CONFIG_OVERRIDE_PREEMPHASIS_ENABLED (1<<0)
+#define FEATURE_CONFIG_PFC_ENABLED		(1<<1)
 #define FEATURE_CONFIG_BC_SUPPORTS_OPT_MDL_VRFY	(1<<2)
 #define FEATURE_CONFIG_BC_SUPPORTS_DUAL_PHY_OPT_MDL_VRFY	(1<<3)
 	/* Will be populated during common init */
@@ -332,4 +333,43 @@ u8 bnx2x_phy_probe(struct link_params *params);
 u8 bnx2x_fan_failure_det_req(struct bnx2x *bp, u32 shmem_base,
 			     u32 shmem2_base, u8 port);
 
+/* PFC port configuration params */
+struct bnx2x_nig_brb_pfc_port_params {
+	/* NIG */
+	u32 pause_enable;
+	u32 llfc_out_en;
+	u32 llfc_enable;
+	u32 pkt_priority_to_cos;
+	u32 rx_cos0_priority_mask;
+	u32 rx_cos1_priority_mask;
+	u32 llfc_high_priority_classes;
+	u32 llfc_low_priority_classes;
+	/* BRB */
+	u32 cos0_pauseable;
+	u32 cos1_pauseable;
+};
+
+/**
+ * Used to update the PFC attributes in EMAC, BMAC, NIG and BRB
+ * when link is already up
+ */
+void bnx2x_update_pfc(struct link_params *params,
+		      struct link_vars *vars,
+		      struct bnx2x_nig_brb_pfc_port_params *pfc_params);
+
+
+/* Used to configure the ETS to disable */
+void bnx2x_ets_disabled(struct link_params *params);
+
+/* Used to configure the ETS to BW limited */
+void bnx2x_ets_bw_limit(const struct link_params *params, const u32 cos0_bw,
+						const u32 cos1_bw);
+
+/* Used to configure the ETS to strict */
+u8 bnx2x_ets_strict(const struct link_params *params, const u8 strict_cos);
+
+/* Read pfc statistic*/
+void bnx2x_pfc_statistic(struct link_params *params, struct link_vars *vars,
+						 u32 pfc_frames_sent[2],
+						 u32 pfc_frames_received[2]);
 #endif /* BNX2X_LINK_H */

drivers/net/bnx2x/bnx2x_main.c

@@ -55,6 +55,7 @@
 #include "bnx2x_init.h"
 #include "bnx2x_init_ops.h"
 #include "bnx2x_cmn.h"
+#include "bnx2x_dcb.h"
 
 #include <linux/firmware.h>
 #include "bnx2x_fw_file_hdr.h"
@@ -3105,6 +3106,11 @@ static inline void bnx2x_attn_int_deasserted3(struct bnx2x *bp, u32 attn)
 			if ((bp->port.pmf == 0) && (val & DRV_STATUS_PMF))
 				bnx2x_pmf_update(bp);
 
+			if (bp->port.pmf &&
+			    (val & DRV_STATUS_DCBX_NEGOTIATION_RESULTS))
+				/* start dcbx state machine */
+				bnx2x_dcbx_set_params(bp,
+					BNX2X_DCBX_STATE_NEG_RECEIVED);
 		} else if (attn & BNX2X_MC_ASSERT_BITS) {
 
 			BNX2X_ERR("MC assert!\n");
@@ -3724,6 +3730,15 @@ static void bnx2x_eq_int(struct bnx2x *bp)
 						BNX2X_FP_STATE_CLOSED;
 
 			goto next_spqe;
+
+		case EVENT_RING_OPCODE_STOP_TRAFFIC:
+			DP(NETIF_MSG_IFUP, "got STOP TRAFFIC\n");
+			bnx2x_dcbx_set_params(bp, BNX2X_DCBX_STATE_TX_PAUSED);
+			goto next_spqe;
+		case EVENT_RING_OPCODE_START_TRAFFIC:
+			DP(NETIF_MSG_IFUP, "got START TRAFFIC\n");
+			bnx2x_dcbx_set_params(bp, BNX2X_DCBX_STATE_TX_RELEASED);
+			goto next_spqe;
 		}
 
 		switch (opcode | bp->state) {
@@ -4363,6 +4378,7 @@ static void bnx2x_init_internal_common(struct bnx2x *bp)
 static void bnx2x_init_internal_port(struct bnx2x *bp)
 {
 	/* port */
+	bnx2x_dcb_init_intmem_pfc(bp);
 }
 
 static void bnx2x_init_internal(struct bnx2x *bp, u32 load_code)
@@ -5488,8 +5504,10 @@ static int bnx2x_init_hw_port(struct bnx2x *bp)
 	 *  - SF mode: bits 3-7 are masked. only bits 0-2 are in use
 	 *  - MF mode: bit 3 is masked. bits 0-2 are in use as in SF
 	 *             bits 4-7 are used for "per vn group attention" */
-	REG_WR(bp, MISC_REG_AEU_MASK_ATTN_FUNC_0 + port*4,
-	       (IS_MF(bp) ? 0xF7 : 0x7));
+	val = IS_MF(bp) ? 0xF7 : 0x7;
+	/* Enable DCBX attention for all but E1 */
+	val |= CHIP_IS_E1(bp) ? 0 : 0x10;
+	REG_WR(bp, MISC_REG_AEU_MASK_ATTN_FUNC_0 + port*4, val);
 
 	bnx2x_init_block(bp, PXPCS_BLOCK, init_stage);
 	bnx2x_init_block(bp, EMAC0_BLOCK, init_stage);
@@ -8775,6 +8793,8 @@ static int __devinit bnx2x_init_bp(struct bnx2x *bp)
 	bp->timer.data = (unsigned long) bp;
 	bp->timer.function = bnx2x_timer;
 
+	bnx2x_dcbx_init_params(bp);
+
 	return rc;
 }