ice: Add code for DCB initialization part 2/4

This patch introduces a new top level function ice_init_dcb (and
related lower level helper functions) which continues the DCB init
flow.

This function uses ice_get_dcb_cfg to get, parse and store the DCB
configuration. Once this is done, it sets itself up to be notified
by the firmware on LLDP MIB change events.
Reviewed-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@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_adminq_cmd.h

@@ -1132,6 +1132,48 @@ struct ice_aqc_pf_vf_msg {
 	__le32 addr_low;
 };
 
+/* Get LLDP MIB (indirect 0x0A00)
+ * Note: This is also used by the LLDP MIB Change Event (0x0A01)
+ * as the format is the same.
+ */
+struct ice_aqc_lldp_get_mib {
+	u8 type;
+#define ICE_AQ_LLDP_MIB_TYPE_S			0
+#define ICE_AQ_LLDP_MIB_TYPE_M			(0x3 << ICE_AQ_LLDP_MIB_TYPE_S)
+#define ICE_AQ_LLDP_MIB_LOCAL			0
+#define ICE_AQ_LLDP_MIB_REMOTE			1
+#define ICE_AQ_LLDP_MIB_LOCAL_AND_REMOTE	2
+#define ICE_AQ_LLDP_BRID_TYPE_S			2
+#define ICE_AQ_LLDP_BRID_TYPE_M			(0x3 << ICE_AQ_LLDP_BRID_TYPE_S)
+#define ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID	0
+#define ICE_AQ_LLDP_BRID_TYPE_NON_TPMR		1
+/* Tx pause flags in the 0xA01 event use ICE_AQ_LLDP_TX_* */
+#define ICE_AQ_LLDP_TX_S			0x4
+#define ICE_AQ_LLDP_TX_M			(0x03 << ICE_AQ_LLDP_TX_S)
+#define ICE_AQ_LLDP_TX_ACTIVE			0
+#define ICE_AQ_LLDP_TX_SUSPENDED		1
+#define ICE_AQ_LLDP_TX_FLUSHED			3
+/* The following bytes are reserved for the Get LLDP MIB command (0x0A00)
+ * and in the LLDP MIB Change Event (0x0A01). They are valid for the
+ * Get LLDP MIB (0x0A00) response only.
+ */
+	u8 reserved1;
+	__le16 local_len;
+	__le16 remote_len;
+	u8 reserved2[2];
+	__le32 addr_high;
+	__le32 addr_low;
+};
+
+/* Configure LLDP MIB Change Event (direct 0x0A01) */
+/* For MIB Change Event use ice_aqc_lldp_get_mib structure above */
+struct ice_aqc_lldp_set_mib_change {
+	u8 command;
+#define ICE_AQ_LLDP_MIB_UPDATE_ENABLE		0x0
+#define ICE_AQ_LLDP_MIB_UPDATE_DIS		0x1
+	u8 reserved[15];
+};
+
 /* Start LLDP (direct 0x0A06) */
 struct ice_aqc_lldp_start {
 	u8 command;
@@ -1140,6 +1182,36 @@ struct ice_aqc_lldp_start {
 	u8 reserved[15];
 };
 
+/* Get CEE DCBX Oper Config (0x0A07)
+ * The command uses the generic descriptor struct and
+ * returns the struct below as an indirect response.
+ */
+struct ice_aqc_get_cee_dcb_cfg_resp {
+	u8 oper_num_tc;
+	u8 oper_prio_tc[4];
+	u8 oper_tc_bw[8];
+	u8 oper_pfc_en;
+	__le16 oper_app_prio;
+#define ICE_AQC_CEE_APP_FCOE_S		0
+#define ICE_AQC_CEE_APP_FCOE_M		(0x7 << ICE_AQC_CEE_APP_FCOE_S)
+#define ICE_AQC_CEE_APP_ISCSI_S		3
+#define ICE_AQC_CEE_APP_ISCSI_M		(0x7 << ICE_AQC_CEE_APP_ISCSI_S)
+#define ICE_AQC_CEE_APP_FIP_S		8
+#define ICE_AQC_CEE_APP_FIP_M		(0x7 << ICE_AQC_CEE_APP_FIP_S)
+	__le32 tlv_status;
+#define ICE_AQC_CEE_PG_STATUS_S		0
+#define ICE_AQC_CEE_PG_STATUS_M		(0x7 << ICE_AQC_CEE_PG_STATUS_S)
+#define ICE_AQC_CEE_PFC_STATUS_S	3
+#define ICE_AQC_CEE_PFC_STATUS_M	(0x7 << ICE_AQC_CEE_PFC_STATUS_S)
+#define ICE_AQC_CEE_FCOE_STATUS_S	8
+#define ICE_AQC_CEE_FCOE_STATUS_M	(0x7 << ICE_AQC_CEE_FCOE_STATUS_S)
+#define ICE_AQC_CEE_ISCSI_STATUS_S	11
+#define ICE_AQC_CEE_ISCSI_STATUS_M	(0x7 << ICE_AQC_CEE_ISCSI_STATUS_S)
+#define ICE_AQC_CEE_FIP_STATUS_S	16
+#define ICE_AQC_CEE_FIP_STATUS_M	(0x7 << ICE_AQC_CEE_FIP_STATUS_S)
+	u8 reserved[12];
+};
+
 /* Stop/Start LLDP Agent (direct 0x0A09)
  * Used for stopping/starting specific LLDP agent. e.g. DCBx.
  * The same structure is used for the response, with the command field
@@ -1411,6 +1483,8 @@ struct ice_aq_desc {
 		struct ice_aqc_query_txsched_res query_sched_res;
 		struct ice_aqc_nvm nvm;
 		struct ice_aqc_pf_vf_msg virt;
+		struct ice_aqc_lldp_get_mib lldp_get_mib;
+		struct ice_aqc_lldp_set_mib_change lldp_set_event;
 		struct ice_aqc_lldp_start lldp_start;
 		struct ice_aqc_lldp_stop_start_specific_agent lldp_agent_ctrl;
 		struct ice_aqc_get_set_rss_lut get_set_rss_lut;
@@ -1445,6 +1519,8 @@ struct ice_aq_desc {
 /* error codes */
 enum ice_aq_err {
 	ICE_AQ_RC_OK		= 0,  /* Success */
+	ICE_AQ_RC_EPERM		= 1,  /* Operation not permitted */
+	ICE_AQ_RC_ENOENT	= 2,  /* No such element */
 	ICE_AQ_RC_ENOMEM	= 9,  /* Out of memory */
 	ICE_AQ_RC_EBUSY		= 12, /* Device or resource busy */
 	ICE_AQ_RC_EEXIST	= 13, /* Object already exists */
@@ -1515,7 +1591,10 @@ enum ice_adminq_opc {
 	ice_mbx_opc_send_msg_to_pf			= 0x0801,
 	ice_mbx_opc_send_msg_to_vf			= 0x0802,
 	/* LLDP commands */
+	ice_aqc_opc_lldp_get_mib			= 0x0A00,
+	ice_aqc_opc_lldp_set_mib_change			= 0x0A01,
 	ice_aqc_opc_lldp_start				= 0x0A06,
+	ice_aqc_opc_get_cee_dcb_cfg			= 0x0A07,
 	ice_aqc_opc_lldp_stop_start_specific_agent	= 0x0A09,
 
 	/* RSS commands */

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

@@ -5,6 +5,78 @@
 #include "ice_sched.h"
 #include "ice_dcb.h"
 
+/**
+ * ice_aq_get_lldp_mib
+ * @hw: pointer to the HW struct
+ * @bridge_type: type of bridge requested
+ * @mib_type: Local, Remote or both Local and Remote MIBs
+ * @buf: pointer to the caller-supplied buffer to store the MIB block
+ * @buf_size: size of the buffer (in bytes)
+ * @local_len: length of the returned Local LLDP MIB
+ * @remote_len: length of the returned Remote LLDP MIB
+ * @cd: pointer to command details structure or NULL
+ *
+ * Requests the complete LLDP MIB (entire packet). (0x0A00)
+ */
+static enum ice_status
+ice_aq_get_lldp_mib(struct ice_hw *hw, u8 bridge_type, u8 mib_type, void *buf,
+		    u16 buf_size, u16 *local_len, u16 *remote_len,
+		    struct ice_sq_cd *cd)
+{
+	struct ice_aqc_lldp_get_mib *cmd;
+	struct ice_aq_desc desc;
+	enum ice_status status;
+
+	cmd = &desc.params.lldp_get_mib;
+
+	if (buf_size == 0 || !buf)
+		return ICE_ERR_PARAM;
+
+	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_get_mib);
+
+	cmd->type = mib_type & ICE_AQ_LLDP_MIB_TYPE_M;
+	cmd->type |= (bridge_type << ICE_AQ_LLDP_BRID_TYPE_S) &
+		ICE_AQ_LLDP_BRID_TYPE_M;
+
+	desc.datalen = cpu_to_le16(buf_size);
+
+	status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
+	if (!status) {
+		if (local_len)
+			*local_len = le16_to_cpu(cmd->local_len);
+		if (remote_len)
+			*remote_len = le16_to_cpu(cmd->remote_len);
+	}
+
+	return status;
+}
+
+/**
+ * ice_aq_cfg_lldp_mib_change
+ * @hw: pointer to the HW struct
+ * @ena_update: Enable or Disable event posting
+ * @cd: pointer to command details structure or NULL
+ *
+ * Enable or Disable posting of an event on ARQ when LLDP MIB
+ * associated with the interface changes (0x0A01)
+ */
+static enum ice_status
+ice_aq_cfg_lldp_mib_change(struct ice_hw *hw, bool ena_update,
+			   struct ice_sq_cd *cd)
+{
+	struct ice_aqc_lldp_set_mib_change *cmd;
+	struct ice_aq_desc desc;
+
+	cmd = &desc.params.lldp_set_event;
+
+	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_set_mib_change);
+
+	if (!ena_update)
+		cmd->command |= ICE_AQ_LLDP_MIB_UPDATE_DIS;
+
+	return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
+}
+
 /**
  * ice_aq_start_lldp
  * @hw: pointer to the HW struct
@@ -41,6 +113,523 @@ u8 ice_get_dcbx_status(struct ice_hw *hw)
 		    PRTDCB_GENS_DCBX_STATUS_S);
 }
 
+/**
+ * ice_parse_ieee_ets_common_tlv
+ * @buf: Data buffer to be parsed for ETS CFG/REC data
+ * @ets_cfg: Container to store parsed data
+ *
+ * Parses the common data of IEEE 802.1Qaz ETS CFG/REC TLV
+ */
+static void
+ice_parse_ieee_ets_common_tlv(u8 *buf, struct ice_dcb_ets_cfg *ets_cfg)
+{
+	u8 offset = 0;
+	int i;
+
+	/* Priority Assignment Table (4 octets)
+	 * Octets:|    1    |    2    |    3    |    4    |
+	 *        -----------------------------------------
+	 *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
+	 *        -----------------------------------------
+	 *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
+	 *        -----------------------------------------
+	 */
+	for (i = 0; i < 4; i++) {
+		ets_cfg->prio_table[i * 2] =
+			((buf[offset] & ICE_IEEE_ETS_PRIO_1_M) >>
+			 ICE_IEEE_ETS_PRIO_1_S);
+		ets_cfg->prio_table[i * 2 + 1] =
+			((buf[offset] & ICE_IEEE_ETS_PRIO_0_M) >>
+			 ICE_IEEE_ETS_PRIO_0_S);
+		offset++;
+	}
+
+	/* TC Bandwidth Table (8 octets)
+	 * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
+	 *        ---------------------------------
+	 *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
+	 *        ---------------------------------
+	 *
+	 * TSA Assignment Table (8 octets)
+	 * Octets:| 9 | 10| 11| 12| 13| 14| 15| 16|
+	 *        ---------------------------------
+	 *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
+	 *        ---------------------------------
+	 */
+	ice_for_each_traffic_class(i) {
+		ets_cfg->tcbwtable[i] = buf[offset];
+		ets_cfg->tsatable[i] = buf[ICE_MAX_TRAFFIC_CLASS + offset++];
+	}
+}
+
+/**
+ * ice_parse_ieee_etscfg_tlv
+ * @tlv: IEEE 802.1Qaz ETS CFG TLV
+ * @dcbcfg: Local store to update ETS CFG data
+ *
+ * Parses IEEE 802.1Qaz ETS CFG TLV
+ */
+static void
+ice_parse_ieee_etscfg_tlv(struct ice_lldp_org_tlv *tlv,
+			  struct ice_dcbx_cfg *dcbcfg)
+{
+	struct ice_dcb_ets_cfg *etscfg;
+	u8 *buf = tlv->tlvinfo;
+
+	/* First Octet post subtype
+	 * --------------------------
+	 * |will-|CBS  | Re-  | Max |
+	 * |ing  |     |served| TCs |
+	 * --------------------------
+	 * |1bit | 1bit|3 bits|3bits|
+	 */
+	etscfg = &dcbcfg->etscfg;
+	etscfg->willing = ((buf[0] & ICE_IEEE_ETS_WILLING_M) >>
+			   ICE_IEEE_ETS_WILLING_S);
+	etscfg->cbs = ((buf[0] & ICE_IEEE_ETS_CBS_M) >> ICE_IEEE_ETS_CBS_S);
+	etscfg->maxtcs = ((buf[0] & ICE_IEEE_ETS_MAXTC_M) >>
+			  ICE_IEEE_ETS_MAXTC_S);
+
+	/* Begin parsing at Priority Assignment Table (offset 1 in buf) */
+	ice_parse_ieee_ets_common_tlv(&buf[1], etscfg);
+}
+
+/**
+ * ice_parse_ieee_etsrec_tlv
+ * @tlv: IEEE 802.1Qaz ETS REC TLV
+ * @dcbcfg: Local store to update ETS REC data
+ *
+ * Parses IEEE 802.1Qaz ETS REC TLV
+ */
+static void
+ice_parse_ieee_etsrec_tlv(struct ice_lldp_org_tlv *tlv,
+			  struct ice_dcbx_cfg *dcbcfg)
+{
+	u8 *buf = tlv->tlvinfo;
+
+	/* Begin parsing at Priority Assignment Table (offset 1 in buf) */
+	ice_parse_ieee_ets_common_tlv(&buf[1], &dcbcfg->etsrec);
+}
+
+/**
+ * ice_parse_ieee_pfccfg_tlv
+ * @tlv: IEEE 802.1Qaz PFC CFG TLV
+ * @dcbcfg: Local store to update PFC CFG data
+ *
+ * Parses IEEE 802.1Qaz PFC CFG TLV
+ */
+static void
+ice_parse_ieee_pfccfg_tlv(struct ice_lldp_org_tlv *tlv,
+			  struct ice_dcbx_cfg *dcbcfg)
+{
+	u8 *buf = tlv->tlvinfo;
+
+	/* ----------------------------------------
+	 * |will-|MBC  | Re-  | PFC |  PFC Enable  |
+	 * |ing  |     |served| cap |              |
+	 * -----------------------------------------
+	 * |1bit | 1bit|2 bits|4bits| 1 octet      |
+	 */
+	dcbcfg->pfc.willing = ((buf[0] & ICE_IEEE_PFC_WILLING_M) >>
+			       ICE_IEEE_PFC_WILLING_S);
+	dcbcfg->pfc.mbc = ((buf[0] & ICE_IEEE_PFC_MBC_M) >> ICE_IEEE_PFC_MBC_S);
+	dcbcfg->pfc.pfccap = ((buf[0] & ICE_IEEE_PFC_CAP_M) >>
+			      ICE_IEEE_PFC_CAP_S);
+	dcbcfg->pfc.pfcena = buf[1];
+}
+
+/**
+ * ice_parse_ieee_app_tlv
+ * @tlv: IEEE 802.1Qaz APP TLV
+ * @dcbcfg: Local store to update APP PRIO data
+ *
+ * Parses IEEE 802.1Qaz APP PRIO TLV
+ */
+static void
+ice_parse_ieee_app_tlv(struct ice_lldp_org_tlv *tlv,
+		       struct ice_dcbx_cfg *dcbcfg)
+{
+	u16 offset = 0;
+	u16 typelen;
+	int i = 0;
+	u16 len;
+	u8 *buf;
+
+	typelen = ntohs(tlv->typelen);
+	len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
+	buf = tlv->tlvinfo;
+
+	/* Removing sizeof(ouisubtype) and reserved byte from len.
+	 * Remaining len div 3 is number of APP TLVs.
+	 */
+	len -= (sizeof(tlv->ouisubtype) + 1);
+
+	/* Move offset to App Priority Table */
+	offset++;
+
+	/* Application Priority Table (3 octets)
+	 * Octets:|         1          |    2    |    3    |
+	 *        -----------------------------------------
+	 *        |Priority|Rsrvd| Sel |    Protocol ID    |
+	 *        -----------------------------------------
+	 *   Bits:|23    21|20 19|18 16|15                0|
+	 *        -----------------------------------------
+	 */
+	while (offset < len) {
+		dcbcfg->app[i].priority = ((buf[offset] &
+					    ICE_IEEE_APP_PRIO_M) >>
+					   ICE_IEEE_APP_PRIO_S);
+		dcbcfg->app[i].selector = ((buf[offset] &
+					    ICE_IEEE_APP_SEL_M) >>
+					   ICE_IEEE_APP_SEL_S);
+		dcbcfg->app[i].prot_id = (buf[offset + 1] << 0x8) |
+			buf[offset + 2];
+		/* Move to next app */
+		offset += 3;
+		i++;
+		if (i >= ICE_DCBX_MAX_APPS)
+			break;
+	}
+
+	dcbcfg->numapps = i;
+}
+
+/**
+ * ice_parse_ieee_tlv
+ * @tlv: IEEE 802.1Qaz TLV
+ * @dcbcfg: Local store to update ETS REC data
+ *
+ * Get the TLV subtype and send it to parsing function
+ * based on the subtype value
+ */
+static void
+ice_parse_ieee_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
+{
+	u32 ouisubtype;
+	u8 subtype;
+
+	ouisubtype = ntohl(tlv->ouisubtype);
+	subtype = (u8)((ouisubtype & ICE_LLDP_TLV_SUBTYPE_M) >>
+		       ICE_LLDP_TLV_SUBTYPE_S);
+	switch (subtype) {
+	case ICE_IEEE_SUBTYPE_ETS_CFG:
+		ice_parse_ieee_etscfg_tlv(tlv, dcbcfg);
+		break;
+	case ICE_IEEE_SUBTYPE_ETS_REC:
+		ice_parse_ieee_etsrec_tlv(tlv, dcbcfg);
+		break;
+	case ICE_IEEE_SUBTYPE_PFC_CFG:
+		ice_parse_ieee_pfccfg_tlv(tlv, dcbcfg);
+		break;
+	case ICE_IEEE_SUBTYPE_APP_PRI:
+		ice_parse_ieee_app_tlv(tlv, dcbcfg);
+		break;
+	default:
+		break;
+	}
+}
+
+/**
+ * ice_parse_cee_pgcfg_tlv
+ * @tlv: CEE DCBX PG CFG TLV
+ * @dcbcfg: Local store to update ETS CFG data
+ *
+ * Parses CEE DCBX PG CFG TLV
+ */
+static void
+ice_parse_cee_pgcfg_tlv(struct ice_cee_feat_tlv *tlv,
+			struct ice_dcbx_cfg *dcbcfg)
+{
+	struct ice_dcb_ets_cfg *etscfg;
+	u8 *buf = tlv->tlvinfo;
+	u16 offset = 0;
+	int i;
+
+	etscfg = &dcbcfg->etscfg;
+
+	if (tlv->en_will_err & ICE_CEE_FEAT_TLV_WILLING_M)
+		etscfg->willing = 1;
+
+	etscfg->cbs = 0;
+	/* Priority Group Table (4 octets)
+	 * Octets:|    1    |    2    |    3    |    4    |
+	 *        -----------------------------------------
+	 *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
+	 *        -----------------------------------------
+	 *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
+	 *        -----------------------------------------
+	 */
+	for (i = 0; i < 4; i++) {
+		etscfg->prio_table[i * 2] =
+			((buf[offset] & ICE_CEE_PGID_PRIO_1_M) >>
+			 ICE_CEE_PGID_PRIO_1_S);
+		etscfg->prio_table[i * 2 + 1] =
+			((buf[offset] & ICE_CEE_PGID_PRIO_0_M) >>
+			 ICE_CEE_PGID_PRIO_0_S);
+		offset++;
+	}
+
+	/* PG Percentage Table (8 octets)
+	 * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
+	 *        ---------------------------------
+	 *        |pg0|pg1|pg2|pg3|pg4|pg5|pg6|pg7|
+	 *        ---------------------------------
+	 */
+	ice_for_each_traffic_class(i)
+		etscfg->tcbwtable[i] = buf[offset++];
+
+	/* Number of TCs supported (1 octet) */
+	etscfg->maxtcs = buf[offset];
+}
+
+/**
+ * ice_parse_cee_pfccfg_tlv
+ * @tlv: CEE DCBX PFC CFG TLV
+ * @dcbcfg: Local store to update PFC CFG data
+ *
+ * Parses CEE DCBX PFC CFG TLV
+ */
+static void
+ice_parse_cee_pfccfg_tlv(struct ice_cee_feat_tlv *tlv,
+			 struct ice_dcbx_cfg *dcbcfg)
+{
+	u8 *buf = tlv->tlvinfo;
+
+	if (tlv->en_will_err & ICE_CEE_FEAT_TLV_WILLING_M)
+		dcbcfg->pfc.willing = 1;
+
+	/* ------------------------
+	 * | PFC Enable | PFC TCs |
+	 * ------------------------
+	 * | 1 octet    | 1 octet |
+	 */
+	dcbcfg->pfc.pfcena = buf[0];
+	dcbcfg->pfc.pfccap = buf[1];
+}
+
+/**
+ * ice_parse_cee_app_tlv
+ * @tlv: CEE DCBX APP TLV
+ * @dcbcfg: Local store to update APP PRIO data
+ *
+ * Parses CEE DCBX APP PRIO TLV
+ */
+static void
+ice_parse_cee_app_tlv(struct ice_cee_feat_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
+{
+	u16 len, typelen, offset = 0;
+	struct ice_cee_app_prio *app;
+	u8 i;
+
+	typelen = ntohs(tlv->hdr.typelen);
+	len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
+
+	dcbcfg->numapps = len / sizeof(*app);
+	if (!dcbcfg->numapps)
+		return;
+	if (dcbcfg->numapps > ICE_DCBX_MAX_APPS)
+		dcbcfg->numapps = ICE_DCBX_MAX_APPS;
+
+	for (i = 0; i < dcbcfg->numapps; i++) {
+		u8 up, selector;
+
+		app = (struct ice_cee_app_prio *)(tlv->tlvinfo + offset);
+		for (up = 0; up < ICE_MAX_USER_PRIORITY; up++)
+			if (app->prio_map & BIT(up))
+				break;
+
+		dcbcfg->app[i].priority = up;
+
+		/* Get Selector from lower 2 bits, and convert to IEEE */
+		selector = (app->upper_oui_sel & ICE_CEE_APP_SELECTOR_M);
+		switch (selector) {
+		case ICE_CEE_APP_SEL_ETHTYPE:
+			dcbcfg->app[i].selector = ICE_APP_SEL_ETHTYPE;
+			break;
+		case ICE_CEE_APP_SEL_TCPIP:
+			dcbcfg->app[i].selector = ICE_APP_SEL_TCPIP;
+			break;
+		default:
+			/* Keep selector as it is for unknown types */
+			dcbcfg->app[i].selector = selector;
+		}
+
+		dcbcfg->app[i].prot_id = ntohs(app->protocol);
+		/* Move to next app */
+		offset += sizeof(*app);
+	}
+}
+
+/**
+ * ice_parse_cee_tlv
+ * @tlv: CEE DCBX TLV
+ * @dcbcfg: Local store to update DCBX config data
+ *
+ * Get the TLV subtype and send it to parsing function
+ * based on the subtype value
+ */
+static void
+ice_parse_cee_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
+{
+	struct ice_cee_feat_tlv *sub_tlv;
+	u8 subtype, feat_tlv_count = 0;
+	u16 len, tlvlen, typelen;
+	u32 ouisubtype;
+
+	ouisubtype = ntohl(tlv->ouisubtype);
+	subtype = (u8)((ouisubtype & ICE_LLDP_TLV_SUBTYPE_M) >>
+		       ICE_LLDP_TLV_SUBTYPE_S);
+	/* Return if not CEE DCBX */
+	if (subtype != ICE_CEE_DCBX_TYPE)
+		return;
+
+	typelen = ntohs(tlv->typelen);
+	tlvlen = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
+	len = sizeof(tlv->typelen) + sizeof(ouisubtype) +
+		sizeof(struct ice_cee_ctrl_tlv);
+	/* Return if no CEE DCBX Feature TLVs */
+	if (tlvlen <= len)
+		return;
+
+	sub_tlv = (struct ice_cee_feat_tlv *)((char *)tlv + len);
+	while (feat_tlv_count < ICE_CEE_MAX_FEAT_TYPE) {
+		u16 sublen;
+
+		typelen = ntohs(sub_tlv->hdr.typelen);
+		sublen = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
+		subtype = (u8)((typelen & ICE_LLDP_TLV_TYPE_M) >>
+			       ICE_LLDP_TLV_TYPE_S);
+		switch (subtype) {
+		case ICE_CEE_SUBTYPE_PG_CFG:
+			ice_parse_cee_pgcfg_tlv(sub_tlv, dcbcfg);
+			break;
+		case ICE_CEE_SUBTYPE_PFC_CFG:
+			ice_parse_cee_pfccfg_tlv(sub_tlv, dcbcfg);
+			break;
+		case ICE_CEE_SUBTYPE_APP_PRI:
+			ice_parse_cee_app_tlv(sub_tlv, dcbcfg);
+			break;
+		default:
+			return;	/* Invalid Sub-type return */
+		}
+		feat_tlv_count++;
+		/* Move to next sub TLV */
+		sub_tlv = (struct ice_cee_feat_tlv *)
+			  ((char *)sub_tlv + sizeof(sub_tlv->hdr.typelen) +
+			   sublen);
+	}
+}
+
+/**
+ * ice_parse_org_tlv
+ * @tlv: Organization specific TLV
+ * @dcbcfg: Local store to update ETS REC data
+ *
+ * Currently only IEEE 802.1Qaz TLV is supported, all others
+ * will be returned
+ */
+static void
+ice_parse_org_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
+{
+	u32 ouisubtype;
+	u32 oui;
+
+	ouisubtype = ntohl(tlv->ouisubtype);
+	oui = ((ouisubtype & ICE_LLDP_TLV_OUI_M) >> ICE_LLDP_TLV_OUI_S);
+	switch (oui) {
+	case ICE_IEEE_8021QAZ_OUI:
+		ice_parse_ieee_tlv(tlv, dcbcfg);
+		break;
+	case ICE_CEE_DCBX_OUI:
+		ice_parse_cee_tlv(tlv, dcbcfg);
+		break;
+	default:
+		break;
+	}
+}
+
+/**
+ * ice_lldp_to_dcb_cfg
+ * @lldpmib: LLDPDU to be parsed
+ * @dcbcfg: store for LLDPDU data
+ *
+ * Parse DCB configuration from the LLDPDU
+ */
+static enum ice_status
+ice_lldp_to_dcb_cfg(u8 *lldpmib, struct ice_dcbx_cfg *dcbcfg)
+{
+	struct ice_lldp_org_tlv *tlv;
+	enum ice_status ret = 0;
+	u16 offset = 0;
+	u16 typelen;
+	u16 type;
+	u16 len;
+
+	if (!lldpmib || !dcbcfg)
+		return ICE_ERR_PARAM;
+
+	/* set to the start of LLDPDU */
+	lldpmib += ETH_HLEN;
+	tlv = (struct ice_lldp_org_tlv *)lldpmib;
+	while (1) {
+		typelen = ntohs(tlv->typelen);
+		type = ((typelen & ICE_LLDP_TLV_TYPE_M) >> ICE_LLDP_TLV_TYPE_S);
+		len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
+		offset += sizeof(typelen) + len;
+
+		/* END TLV or beyond LLDPDU size */
+		if (type == ICE_TLV_TYPE_END || offset > ICE_LLDPDU_SIZE)
+			break;
+
+		switch (type) {
+		case ICE_TLV_TYPE_ORG:
+			ice_parse_org_tlv(tlv, dcbcfg);
+			break;
+		default:
+			break;
+		}
+
+		/* Move to next TLV */
+		tlv = (struct ice_lldp_org_tlv *)
+		      ((char *)tlv + sizeof(tlv->typelen) + len);
+	}
+
+	return ret;
+}
+
+/**
+ * ice_aq_get_dcb_cfg
+ * @hw: pointer to the HW struct
+ * @mib_type: mib type for the query
+ * @bridgetype: bridge type for the query (remote)
+ * @dcbcfg: store for LLDPDU data
+ *
+ * Query DCB configuration from the firmware
+ */
+static enum ice_status
+ice_aq_get_dcb_cfg(struct ice_hw *hw, u8 mib_type, u8 bridgetype,
+		   struct ice_dcbx_cfg *dcbcfg)
+{
+	enum ice_status ret;
+	u8 *lldpmib;
+
+	/* Allocate the LLDPDU */
+	lldpmib = devm_kzalloc(ice_hw_to_dev(hw), ICE_LLDPDU_SIZE, GFP_KERNEL);
+	if (!lldpmib)
+		return ICE_ERR_NO_MEMORY;
+
+	ret = ice_aq_get_lldp_mib(hw, bridgetype, mib_type, (void *)lldpmib,
+				  ICE_LLDPDU_SIZE, NULL, NULL, NULL);
+
+	if (!ret)
+		/* Parse LLDP MIB to get DCB configuration */
+		ret = ice_lldp_to_dcb_cfg(lldpmib, dcbcfg);
+
+	devm_kfree(ice_hw_to_dev(hw), lldpmib);
+
+	return ret;
+}
+
 /**
  * ice_aq_start_stop_dcbx - Start/Stop DCBx service in FW
  * @hw: pointer to the HW struct
@@ -83,3 +672,233 @@ ice_aq_start_stop_dcbx(struct ice_hw *hw, bool start_dcbx_agent,
 
 	return status;
 }
+
+/**
+ * ice_aq_get_cee_dcb_cfg
+ * @hw: pointer to the HW struct
+ * @buff: response buffer that stores CEE operational configuration
+ * @cd: pointer to command details structure or NULL
+ *
+ * Get CEE DCBX mode operational configuration from firmware (0x0A07)
+ */
+static enum ice_status
+ice_aq_get_cee_dcb_cfg(struct ice_hw *hw,
+		       struct ice_aqc_get_cee_dcb_cfg_resp *buff,
+		       struct ice_sq_cd *cd)
+{
+	struct ice_aq_desc desc;
+
+	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_get_cee_dcb_cfg);
+
+	return ice_aq_send_cmd(hw, &desc, (void *)buff, sizeof(*buff), cd);
+}
+
+/**
+ * ice_cee_to_dcb_cfg
+ * @cee_cfg: pointer to CEE configuration struct
+ * @dcbcfg: DCB configuration struct
+ *
+ * Convert CEE configuration from firmware to DCB configuration
+ */
+static void
+ice_cee_to_dcb_cfg(struct ice_aqc_get_cee_dcb_cfg_resp *cee_cfg,
+		   struct ice_dcbx_cfg *dcbcfg)
+{
+	u32 status, tlv_status = le32_to_cpu(cee_cfg->tlv_status);
+	u32 ice_aqc_cee_status_mask, ice_aqc_cee_status_shift;
+	u16 app_prio = le16_to_cpu(cee_cfg->oper_app_prio);
+	u8 i, err, sync, oper, app_index, ice_app_sel_type;
+	u16 ice_aqc_cee_app_mask, ice_aqc_cee_app_shift;
+	u16 ice_app_prot_id_type;
+
+	/* CEE PG data to ETS config */
+	dcbcfg->etscfg.maxtcs = cee_cfg->oper_num_tc;
+
+	/* Note that the FW creates the oper_prio_tc nibbles reversed
+	 * from those in the CEE Priority Group sub-TLV.
+	 */
+	for (i = 0; i < ICE_MAX_TRAFFIC_CLASS / 2; i++) {
+		dcbcfg->etscfg.prio_table[i * 2] =
+			((cee_cfg->oper_prio_tc[i] & ICE_CEE_PGID_PRIO_0_M) >>
+			 ICE_CEE_PGID_PRIO_0_S);
+		dcbcfg->etscfg.prio_table[i * 2 + 1] =
+			((cee_cfg->oper_prio_tc[i] & ICE_CEE_PGID_PRIO_1_M) >>
+			 ICE_CEE_PGID_PRIO_1_S);
+	}
+
+	ice_for_each_traffic_class(i) {
+		dcbcfg->etscfg.tcbwtable[i] = cee_cfg->oper_tc_bw[i];
+
+		if (dcbcfg->etscfg.prio_table[i] == ICE_CEE_PGID_STRICT) {
+			/* Map it to next empty TC */
+			dcbcfg->etscfg.prio_table[i] = cee_cfg->oper_num_tc - 1;
+			dcbcfg->etscfg.tsatable[i] = ICE_IEEE_TSA_STRICT;
+		} else {
+			dcbcfg->etscfg.tsatable[i] = ICE_IEEE_TSA_ETS;
+		}
+	}
+
+	/* CEE PFC data to ETS config */
+	dcbcfg->pfc.pfcena = cee_cfg->oper_pfc_en;
+	dcbcfg->pfc.pfccap = ICE_MAX_TRAFFIC_CLASS;
+
+	app_index = 0;
+	for (i = 0; i < 3; i++) {
+		if (i == 0) {
+			/* FCoE APP */
+			ice_aqc_cee_status_mask = ICE_AQC_CEE_FCOE_STATUS_M;
+			ice_aqc_cee_status_shift = ICE_AQC_CEE_FCOE_STATUS_S;
+			ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_FCOE_M;
+			ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_FCOE_S;
+			ice_app_sel_type = ICE_APP_SEL_ETHTYPE;
+			ice_app_prot_id_type = ICE_APP_PROT_ID_FCOE;
+		} else if (i == 1) {
+			/* iSCSI APP */
+			ice_aqc_cee_status_mask = ICE_AQC_CEE_ISCSI_STATUS_M;
+			ice_aqc_cee_status_shift = ICE_AQC_CEE_ISCSI_STATUS_S;
+			ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_ISCSI_M;
+			ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_ISCSI_S;
+			ice_app_sel_type = ICE_APP_SEL_TCPIP;
+			ice_app_prot_id_type = ICE_APP_PROT_ID_ISCSI;
+		} else {
+			/* FIP APP */
+			ice_aqc_cee_status_mask = ICE_AQC_CEE_FIP_STATUS_M;
+			ice_aqc_cee_status_shift = ICE_AQC_CEE_FIP_STATUS_S;
+			ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_FIP_M;
+			ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_FIP_S;
+			ice_app_sel_type = ICE_APP_SEL_ETHTYPE;
+			ice_app_prot_id_type = ICE_APP_PROT_ID_FIP;
+		}
+
+		status = (tlv_status & ice_aqc_cee_status_mask) >>
+			 ice_aqc_cee_status_shift;
+		err = (status & ICE_TLV_STATUS_ERR) ? 1 : 0;
+		sync = (status & ICE_TLV_STATUS_SYNC) ? 1 : 0;
+		oper = (status & ICE_TLV_STATUS_OPER) ? 1 : 0;
+		/* Add FCoE/iSCSI/FIP APP if Error is False and
+		 * Oper/Sync is True
+		 */
+		if (!err && sync && oper) {
+			dcbcfg->app[app_index].priority =
+				(app_prio & ice_aqc_cee_app_mask) >>
+				ice_aqc_cee_app_shift;
+			dcbcfg->app[app_index].selector = ice_app_sel_type;
+			dcbcfg->app[app_index].prot_id = ice_app_prot_id_type;
+			app_index++;
+		}
+	}
+
+	dcbcfg->numapps = app_index;
+}
+
+/**
+ * ice_get_ieee_dcb_cfg
+ * @pi: port information structure
+ * @dcbx_mode: mode of DCBX (IEEE or CEE)
+ *
+ * Get IEEE or CEE mode DCB configuration from the Firmware
+ */
+static enum ice_status
+ice_get_ieee_or_cee_dcb_cfg(struct ice_port_info *pi, u8 dcbx_mode)
+{
+	struct ice_dcbx_cfg *dcbx_cfg = NULL;
+	enum ice_status ret;
+
+	if (!pi)
+		return ICE_ERR_PARAM;
+
+	if (dcbx_mode == ICE_DCBX_MODE_IEEE)
+		dcbx_cfg = &pi->local_dcbx_cfg;
+	else if (dcbx_mode == ICE_DCBX_MODE_CEE)
+		dcbx_cfg = &pi->desired_dcbx_cfg;
+
+	/* Get Local DCB Config in case of ICE_DCBX_MODE_IEEE
+	 * or get CEE DCB Desired Config in case of ICE_DCBX_MODE_CEE
+	 */
+	ret = ice_aq_get_dcb_cfg(pi->hw, ICE_AQ_LLDP_MIB_LOCAL,
+				 ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID, dcbx_cfg);
+	if (ret)
+		goto out;
+
+	/* Get Remote DCB Config */
+	dcbx_cfg = &pi->remote_dcbx_cfg;
+	ret = ice_aq_get_dcb_cfg(pi->hw, ICE_AQ_LLDP_MIB_REMOTE,
+				 ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID, dcbx_cfg);
+	/* Don't treat ENOENT as an error for Remote MIBs */
+	if (pi->hw->adminq.sq_last_status == ICE_AQ_RC_ENOENT)
+		ret = 0;
+
+out:
+	return ret;
+}
+
+/**
+ * ice_get_dcb_cfg
+ * @pi: port information structure
+ *
+ * Get DCB configuration from the Firmware
+ */
+static enum ice_status ice_get_dcb_cfg(struct ice_port_info *pi)
+{
+	struct ice_aqc_get_cee_dcb_cfg_resp cee_cfg;
+	struct ice_dcbx_cfg *dcbx_cfg;
+	enum ice_status ret;
+
+	if (!pi)
+		return ICE_ERR_PARAM;
+
+	ret = ice_aq_get_cee_dcb_cfg(pi->hw, &cee_cfg, NULL);
+	if (!ret) {
+		/* CEE mode */
+		dcbx_cfg = &pi->local_dcbx_cfg;
+		dcbx_cfg->dcbx_mode = ICE_DCBX_MODE_CEE;
+		dcbx_cfg->tlv_status = le32_to_cpu(cee_cfg.tlv_status);
+		ice_cee_to_dcb_cfg(&cee_cfg, dcbx_cfg);
+		ret = ice_get_ieee_or_cee_dcb_cfg(pi, ICE_DCBX_MODE_CEE);
+	} else if (pi->hw->adminq.sq_last_status == ICE_AQ_RC_ENOENT) {
+		/* CEE mode not enabled try querying IEEE data */
+		dcbx_cfg = &pi->local_dcbx_cfg;
+		dcbx_cfg->dcbx_mode = ICE_DCBX_MODE_IEEE;
+		ret = ice_get_ieee_or_cee_dcb_cfg(pi, ICE_DCBX_MODE_IEEE);
+	}
+
+	return ret;
+}
+
+/**
+ * ice_init_dcb
+ * @hw: pointer to the HW struct
+ *
+ * Update DCB configuration from the Firmware
+ */
+enum ice_status ice_init_dcb(struct ice_hw *hw)
+{
+	struct ice_port_info *pi = hw->port_info;
+	enum ice_status ret = 0;
+
+	if (!hw->func_caps.common_cap.dcb)
+		return ICE_ERR_NOT_SUPPORTED;
+
+	pi->is_sw_lldp = true;
+
+	/* Get DCBX status */
+	pi->dcbx_status = ice_get_dcbx_status(hw);
+
+	if (pi->dcbx_status == ICE_DCBX_STATUS_DONE ||
+	    pi->dcbx_status == ICE_DCBX_STATUS_IN_PROGRESS) {
+		/* Get current DCBX configuration */
+		ret = ice_get_dcb_cfg(pi);
+		pi->is_sw_lldp = (hw->adminq.sq_last_status == ICE_AQ_RC_EPERM);
+		if (ret)
+			return ret;
+	} else if (pi->dcbx_status == ICE_DCBX_STATUS_DIS) {
+		return ICE_ERR_NOT_READY;
+	}
+
+	/* Configure the LLDP MIB change event */
+	ret = ice_aq_cfg_lldp_mib_change(hw, true, NULL);
+	if (!ret)
+		pi->is_sw_lldp = false;
+
+	return ret;
+}

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

@@ -8,8 +8,107 @@
 
 #define ICE_DCBX_STATUS_IN_PROGRESS	1
 #define ICE_DCBX_STATUS_DONE		2
+#define ICE_DCBX_STATUS_DIS		7
+
+#define ICE_TLV_TYPE_END		0
+#define ICE_TLV_TYPE_ORG		127
+
+#define ICE_IEEE_8021QAZ_OUI		0x0080C2
+#define ICE_IEEE_SUBTYPE_ETS_CFG	9
+#define ICE_IEEE_SUBTYPE_ETS_REC	10
+#define ICE_IEEE_SUBTYPE_PFC_CFG	11
+#define ICE_IEEE_SUBTYPE_APP_PRI	12
+
+#define ICE_CEE_DCBX_OUI		0x001B21
+#define ICE_CEE_DCBX_TYPE		2
+#define ICE_CEE_SUBTYPE_PG_CFG		2
+#define ICE_CEE_SUBTYPE_PFC_CFG		3
+#define ICE_CEE_SUBTYPE_APP_PRI		4
+#define ICE_CEE_MAX_FEAT_TYPE		3
+/* Defines for LLDP TLV header */
+#define ICE_LLDP_TLV_LEN_S		0
+#define ICE_LLDP_TLV_LEN_M		(0x01FF << ICE_LLDP_TLV_LEN_S)
+#define ICE_LLDP_TLV_TYPE_S		9
+#define ICE_LLDP_TLV_TYPE_M		(0x7F << ICE_LLDP_TLV_TYPE_S)
+#define ICE_LLDP_TLV_SUBTYPE_S		0
+#define ICE_LLDP_TLV_SUBTYPE_M		(0xFF << ICE_LLDP_TLV_SUBTYPE_S)
+#define ICE_LLDP_TLV_OUI_S		8
+#define ICE_LLDP_TLV_OUI_M		(0xFFFFFFUL << ICE_LLDP_TLV_OUI_S)
+
+/* Defines for IEEE ETS TLV */
+#define ICE_IEEE_ETS_MAXTC_S	0
+#define ICE_IEEE_ETS_MAXTC_M		(0x7 << ICE_IEEE_ETS_MAXTC_S)
+#define ICE_IEEE_ETS_CBS_S		6
+#define ICE_IEEE_ETS_CBS_M		BIT(ICE_IEEE_ETS_CBS_S)
+#define ICE_IEEE_ETS_WILLING_S		7
+#define ICE_IEEE_ETS_WILLING_M		BIT(ICE_IEEE_ETS_WILLING_S)
+#define ICE_IEEE_ETS_PRIO_0_S		0
+#define ICE_IEEE_ETS_PRIO_0_M		(0x7 << ICE_IEEE_ETS_PRIO_0_S)
+#define ICE_IEEE_ETS_PRIO_1_S		4
+#define ICE_IEEE_ETS_PRIO_1_M		(0x7 << ICE_IEEE_ETS_PRIO_1_S)
+#define ICE_CEE_PGID_PRIO_0_S		0
+#define ICE_CEE_PGID_PRIO_0_M		(0xF << ICE_CEE_PGID_PRIO_0_S)
+#define ICE_CEE_PGID_PRIO_1_S		4
+#define ICE_CEE_PGID_PRIO_1_M		(0xF << ICE_CEE_PGID_PRIO_1_S)
+#define ICE_CEE_PGID_STRICT		15
+
+/* Defines for IEEE TSA types */
+#define ICE_IEEE_TSA_STRICT		0
+#define ICE_IEEE_TSA_ETS		2
+
+/* Defines for IEEE PFC TLV */
+#define ICE_IEEE_PFC_CAP_S		0
+#define ICE_IEEE_PFC_CAP_M		(0xF << ICE_IEEE_PFC_CAP_S)
+#define ICE_IEEE_PFC_MBC_S		6
+#define ICE_IEEE_PFC_MBC_M		BIT(ICE_IEEE_PFC_MBC_S)
+#define ICE_IEEE_PFC_WILLING_S		7
+#define ICE_IEEE_PFC_WILLING_M		BIT(ICE_IEEE_PFC_WILLING_S)
+
+/* Defines for IEEE APP TLV */
+#define ICE_IEEE_APP_SEL_S		0
+#define ICE_IEEE_APP_SEL_M		(0x7 << ICE_IEEE_APP_SEL_S)
+#define ICE_IEEE_APP_PRIO_S		5
+#define ICE_IEEE_APP_PRIO_M		(0x7 << ICE_IEEE_APP_PRIO_S)
+
+/* IEEE 802.1AB LLDP Organization specific TLV */
+struct ice_lldp_org_tlv {
+	__be16 typelen;
+	__be32 ouisubtype;
+	u8 tlvinfo[1];
+} __packed;
+
+struct ice_cee_tlv_hdr {
+	__be16 typelen;
+	u8 operver;
+	u8 maxver;
+};
+
+struct ice_cee_ctrl_tlv {
+	struct ice_cee_tlv_hdr hdr;
+	__be32 seqno;
+	__be32 ackno;
+};
+
+struct ice_cee_feat_tlv {
+	struct ice_cee_tlv_hdr hdr;
+	u8 en_will_err; /* Bits: |En|Will|Err|Reserved(5)| */
+#define ICE_CEE_FEAT_TLV_ENA_M		0x80
+#define ICE_CEE_FEAT_TLV_WILLING_M	0x40
+#define ICE_CEE_FEAT_TLV_ERR_M		0x20
+	u8 subtype;
+	u8 tlvinfo[1];
+};
+
+struct ice_cee_app_prio {
+	__be16 protocol;
+	u8 upper_oui_sel; /* Bits: |Upper OUI(6)|Selector(2)| */
+#define ICE_CEE_APP_SELECTOR_M	0x03
+	__be16 lower_oui;
+	u8 prio_map;
+} __packed;
 
 u8 ice_get_dcbx_status(struct ice_hw *hw);
+enum ice_status ice_init_dcb(struct ice_hw *hw);
 #ifdef CONFIG_DCB
 enum ice_status ice_aq_start_lldp(struct ice_hw *hw, struct ice_sq_cd *cd);
 enum ice_status

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

@@ -38,5 +38,5 @@ int ice_init_pf_dcb(struct ice_pf *pf)
 		ice_aq_start_stop_dcbx(hw, true, &dcbx_status, NULL);
 	}
 
-	return 0;
+	return ice_init_dcb(hw);
 }

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

@@ -12,6 +12,7 @@ enum ice_status {
 	ICE_ERR_PARAM				= -1,
 	ICE_ERR_NOT_IMPL			= -2,
 	ICE_ERR_NOT_READY			= -3,
+	ICE_ERR_NOT_SUPPORTED			= -4,
 	ICE_ERR_BAD_PTR				= -5,
 	ICE_ERR_INVAL_SIZE			= -6,
 	ICE_ERR_DEVICE_NOT_SUPPORTED		= -8,

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

@@ -262,6 +262,59 @@ struct ice_sched_tx_policy {
 	u8 rdma_ena;
 };
 
+/* CEE or IEEE 802.1Qaz ETS Configuration data */
+struct ice_dcb_ets_cfg {
+	u8 willing;
+	u8 cbs;
+	u8 maxtcs;
+	u8 prio_table[ICE_MAX_TRAFFIC_CLASS];
+	u8 tcbwtable[ICE_MAX_TRAFFIC_CLASS];
+	u8 tsatable[ICE_MAX_TRAFFIC_CLASS];
+};
+
+/* CEE or IEEE 802.1Qaz PFC Configuration data */
+struct ice_dcb_pfc_cfg {
+	u8 willing;
+	u8 mbc;
+	u8 pfccap;
+	u8 pfcena;
+};
+
+/* CEE or IEEE 802.1Qaz Application Priority data */
+struct ice_dcb_app_priority_table {
+	u16 prot_id;
+	u8 priority;
+	u8 selector;
+};
+
+#define ICE_MAX_USER_PRIORITY	8
+#define ICE_DCBX_MAX_APPS	32
+#define ICE_LLDPDU_SIZE		1500
+#define ICE_TLV_STATUS_OPER	0x1
+#define ICE_TLV_STATUS_SYNC	0x2
+#define ICE_TLV_STATUS_ERR	0x4
+#define ICE_APP_PROT_ID_FCOE	0x8906
+#define ICE_APP_PROT_ID_ISCSI	0x0cbc
+#define ICE_APP_PROT_ID_FIP	0x8914
+#define ICE_APP_SEL_ETHTYPE	0x1
+#define ICE_APP_SEL_TCPIP	0x2
+#define ICE_CEE_APP_SEL_ETHTYPE	0x0
+#define ICE_CEE_APP_SEL_TCPIP	0x1
+
+struct ice_dcbx_cfg {
+	u32 numapps;
+	u32 tlv_status; /* CEE mode TLV status */
+	struct ice_dcb_ets_cfg etscfg;
+	struct ice_dcb_ets_cfg etsrec;
+	struct ice_dcb_pfc_cfg pfc;
+	struct ice_dcb_app_priority_table app[ICE_DCBX_MAX_APPS];
+	u8 dcbx_mode;
+#define ICE_DCBX_MODE_CEE	0x1
+#define ICE_DCBX_MODE_IEEE	0x2
+	u8 app_mode;
+#define ICE_DCBX_APPS_NON_WILLING	0x1
+};
+
 struct ice_port_info {
 	struct ice_sched_node *root;	/* Root Node per Port */
 	struct ice_hw *hw;		/* back pointer to HW instance */
@@ -279,8 +332,13 @@ struct ice_port_info {
 	struct ice_mac_info mac;
 	struct ice_phy_info phy;
 	struct mutex sched_lock;	/* protect access to TXSched tree */
+	struct ice_dcbx_cfg local_dcbx_cfg;	/* Oper/Local Cfg */
+	/* DCBX info */
+	struct ice_dcbx_cfg remote_dcbx_cfg;	/* Peer Cfg */
+	struct ice_dcbx_cfg desired_dcbx_cfg;	/* CEE Desired Cfg */
 	/* LLDP/DCBX Status */
 	u8 dcbx_status;
+	u8 is_sw_lldp;
 	u8 lport;
 #define ICE_LPORT_MASK		0xff
 	u8 is_vf;