ice: Call ice_aq_set_mac_cfg

As per the specification, the driver needs to call set_mac_cfg
(opcode 0x0603) to be able to exercise jumbo frames. Call the
function during initialization and the post reset rebuild flow.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 3a4c14150107..0a0b00fffaf7 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -316,6 +316,71 @@ ice_aq_get_link_info(struct ice_port_info *pi, bool ena_lse,
 }
 
 /**
+ * ice_fill_tx_timer_and_fc_thresh
+ * @hw: pointer to the HW struct
+ * @cmd: pointer to MAC cfg structure
+ *
+ * Add Tx timer and FC refresh threshold info to Set MAC Config AQ command
+ * descriptor
+ */
+static void
+ice_fill_tx_timer_and_fc_thresh(struct ice_hw *hw,
+				struct ice_aqc_set_mac_cfg *cmd)
+{
+	u16 fc_thres_val, tx_timer_val;
+	u32 val;
+
+	/* We read back the transmit timer and FC threshold value of
+	 * LFC. Thus, we will use index =
+	 * PRTMAC_HSEC_CTL_TX_PAUSE_QUANTA_MAX_INDEX.
+	 *
+	 * Also, because we are operating on transmit timer and FC
+	 * threshold of LFC, we don't turn on any bit in tx_tmr_priority
+	 */
+#define IDX_OF_LFC PRTMAC_HSEC_CTL_TX_PAUSE_QUANTA_MAX_INDEX
+
+	/* Retrieve the transmit timer */
+	val = rd32(hw, PRTMAC_HSEC_CTL_TX_PAUSE_QUANTA(IDX_OF_LFC));
+	tx_timer_val = val &
+		PRTMAC_HSEC_CTL_TX_PAUSE_QUANTA_HSEC_CTL_TX_PAUSE_QUANTA_M;
+	cmd->tx_tmr_value = cpu_to_le16(tx_timer_val);
+
+	/* Retrieve the FC threshold */
+	val = rd32(hw, PRTMAC_HSEC_CTL_TX_PAUSE_REFRESH_TIMER(IDX_OF_LFC));
+	fc_thres_val = val & PRTMAC_HSEC_CTL_TX_PAUSE_REFRESH_TIMER_M;
+
+	cmd->fc_refresh_threshold = cpu_to_le16(fc_thres_val);
+}
+
+/**
+ * ice_aq_set_mac_cfg
+ * @hw: pointer to the HW struct
+ * @max_frame_size: Maximum Frame Size to be supported
+ * @cd: pointer to command details structure or NULL
+ *
+ * Set MAC configuration (0x0603)
+ */
+enum ice_status
+ice_aq_set_mac_cfg(struct ice_hw *hw, u16 max_frame_size, struct ice_sq_cd *cd)
+{
+	struct ice_aqc_set_mac_cfg *cmd;
+	struct ice_aq_desc desc;
+
+	cmd = &desc.params.set_mac_cfg;
+
+	if (max_frame_size == 0)
+		return ICE_ERR_PARAM;
+
+	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_set_mac_cfg);
+
+	cmd->max_frame_size = cpu_to_le16(max_frame_size);
+
+	ice_fill_tx_timer_and_fc_thresh(hw, cmd);
+
+	return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
+}
+
+/**
  * ice_init_fltr_mgmt_struct - initializes filter management list and locks
  * @hw: pointer to the HW struct
  */
@@ -747,6 +812,10 @@ enum ice_status ice_init_hw(struct ice_hw *hw)
 
 	if (status)
 		goto err_unroll_fltr_mgmt_struct;
+	/* enable jumbo frame support at MAC level */
+	status = ice_aq_set_mac_cfg(hw, ICE_AQ_SET_MAC_FRAME_SIZE_MAX, NULL);
+	if (status)
+		goto err_unroll_fltr_mgmt_struct;
 	/* Obtain counter base index which would be used by flow director */
 	status = ice_alloc_fd_res_cntr(hw, &hw->fd_ctr_base);
 	if (status)