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.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;