i40e: implement DCB support infastructure

Intel XL710 series of adapters support QoS as per the
IEEE 802.1 DCB (Data Center Bridging) standard.
This is supported in conjuction with:
- Enhanced Transmission Selection (ETS) - IEEE 802.1Qaz
- Priority Flow Control (PFC) - IEEE 802.1Qbb
- DCB eXchange Protocol (DCBX) - IEEE 802.1Qaz

On Intel XL710 adapters DCBX is performed by the adapter
firmware. The firmware runs DCBX in willing mode and configures
the port as per the DCB settings recommended by it's link
partner.

By default in absence of any DCBX; firmware would configure the
port with a single traffic class and all of the port bandwith
will be allocated to that traffic class.

This patch adds functions and calls to support querying and
configuring DCB using firmware APIs.

Signed-off-by: Neerav Parikh <Neerav.Parikh@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-By: Jack Morgan<jack.morgan@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 119 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index cfcee4b8475c..3f9f69b23028 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -1804,6 +1804,28 @@ i40e_status i40e_aq_delete_element(struct i40e_hw *hw, u16 seid,
 }
 
 /**
+ * i40e_aq_dcb_updated - DCB Updated Command
+ * @hw: pointer to the hw struct
+ * @cmd_details: pointer to command details structure or NULL
+ *
+ * EMP will return when the shared RPB settings have been
+ * recomputed and modified. The retval field in the descriptor
+ * will be set to 0 when RPB is modified.
+ **/
+i40e_status i40e_aq_dcb_updated(struct i40e_hw *hw,
+				struct i40e_asq_cmd_details *cmd_details)
+{
+	struct i40e_aq_desc desc;
+	i40e_status status;
+
+	i40e_fill_default_direct_cmd_desc(&desc, i40e_aqc_opc_dcb_updated);
+
+	status = i40e_asq_send_command(hw, &desc, NULL, 0, cmd_details);
+
+	return status;
+}
+
+/**
  * i40e_aq_tx_sched_cmd - generic Tx scheduler AQ command handler
  * @hw: pointer to the hw struct
  * @seid: seid for the physical port/switching component/vsi
@@ -1882,6 +1904,40 @@ i40e_status i40e_aq_config_vsi_tc_bw(struct i40e_hw *hw,
 }
 
 /**
+ * i40e_aq_config_switch_comp_ets - Enable/Disable/Modify ETS on the port
+ * @hw: pointer to the hw struct
+ * @seid: seid of the switching component connected to Physical Port
+ * @ets_data: Buffer holding ETS parameters
+ * @cmd_details: pointer to command details structure or NULL
+ **/
+i40e_status i40e_aq_config_switch_comp_ets(struct i40e_hw *hw,
+		u16 seid,
+		struct i40e_aqc_configure_switching_comp_ets_data *ets_data,
+		enum i40e_admin_queue_opc opcode,
+		struct i40e_asq_cmd_details *cmd_details)
+{
+	return i40e_aq_tx_sched_cmd(hw, seid, (void *)ets_data,
+				    sizeof(*ets_data), opcode, cmd_details);
+}
+
+/**
+ * i40e_aq_config_switch_comp_bw_config - Config Switch comp BW Alloc per TC
+ * @hw: pointer to the hw struct
+ * @seid: seid of the switching component
+ * @bw_data: Buffer holding enabled TCs, relative/absolute TC BW limit/credits
+ * @cmd_details: pointer to command details structure or NULL
+ **/
+i40e_status i40e_aq_config_switch_comp_bw_config(struct i40e_hw *hw,
+	u16 seid,
+	struct i40e_aqc_configure_switching_comp_bw_config_data *bw_data,
+	struct i40e_asq_cmd_details *cmd_details)
+{
+	return i40e_aq_tx_sched_cmd(hw, seid, (void *)bw_data, sizeof(*bw_data),
+			    i40e_aqc_opc_configure_switching_comp_bw_config,
+			    cmd_details);
+}
+
+/**
  * i40e_aq_query_vsi_bw_config - Query VSI BW configuration
  * @hw: pointer to the hw struct
  * @seid: seid of the VSI
@@ -2134,6 +2190,69 @@ i40e_status i40e_set_filter_control(struct i40e_hw *hw,
 
 	return 0;
 }
+
+/**
+ * i40e_aq_add_rem_control_packet_filter - Add or Remove Control Packet Filter
+ * @hw: pointer to the hw struct
+ * @mac_addr: MAC address to use in the filter
+ * @ethtype: Ethertype to use in the filter
+ * @flags: Flags that needs to be applied to the filter
+ * @vsi_seid: seid of the control VSI
+ * @queue: VSI queue number to send the packet to
+ * @is_add: Add control packet filter if True else remove
+ * @stats: Structure to hold information on control filter counts
+ * @cmd_details: pointer to command details structure or NULL
+ *
+ * This command will Add or Remove control packet filter for a control VSI.
+ * In return it will update the total number of perfect filter count in
+ * the stats member.
+ **/
+i40e_status i40e_aq_add_rem_control_packet_filter(struct i40e_hw *hw,
+				u8 *mac_addr, u16 ethtype, u16 flags,
+				u16 vsi_seid, u16 queue, bool is_add,
+				struct i40e_control_filter_stats *stats,
+				struct i40e_asq_cmd_details *cmd_details)
+{
+	struct i40e_aq_desc desc;
+	struct i40e_aqc_add_remove_control_packet_filter *cmd =
+		(struct i40e_aqc_add_remove_control_packet_filter *)
+		&desc.params.raw;
+	struct i40e_aqc_add_remove_control_packet_filter_completion *resp =
+		(struct i40e_aqc_add_remove_control_packet_filter_completion *)
+		&desc.params.raw;
+	i40e_status status;
+
+	if (vsi_seid == 0)
+		return I40E_ERR_PARAM;
+
+	if (is_add) {
+		i40e_fill_default_direct_cmd_desc(&desc,
+				i40e_aqc_opc_add_control_packet_filter);
+		cmd->queue = cpu_to_le16(queue);
+	} else {
+		i40e_fill_default_direct_cmd_desc(&desc,
+				i40e_aqc_opc_remove_control_packet_filter);
+	}
+
+	if (mac_addr)
+		memcpy(cmd->mac, mac_addr, ETH_ALEN);
+
+	cmd->etype = cpu_to_le16(ethtype);
+	cmd->flags = cpu_to_le16(flags);
+	cmd->seid = cpu_to_le16(vsi_seid);
+
+	status = i40e_asq_send_command(hw, &desc, NULL, 0, cmd_details);
+
+	if (!status && stats) {
+		stats->mac_etype_used = le16_to_cpu(resp->mac_etype_used);
+		stats->etype_used = le16_to_cpu(resp->etype_used);
+		stats->mac_etype_free = le16_to_cpu(resp->mac_etype_free);
+		stats->etype_free = le16_to_cpu(resp->etype_free);
+	}
+
+	return status;
+}
+
 /**
  * i40e_set_pci_config_data - store PCI bus info
  * @hw: pointer to hardware structure