75  * igc_set_fc_watermarks - Set flow control high/low watermarks
78  * Sets the flow control high/low threshold (watermark) registers.  If
79  * flow control XON frame transmission is enabled, then set XON frame
86 	/* Set the flow control receive threshold registers.  Normally,  in igc_set_fc_watermarks()
110  * igc_setup_link - Setup flow control and link settings
113  * Determines which flow control settings to use, then configures flow
129 	/* If requested flow control is set to default, set flow control  in igc_setup_link()
135 	/* We want to save off the original Flow Control configuration just  in igc_setup_link()
137 	 * hub or switch with different Flow Control capabilities.  in igc_setup_link()
148 	/* Initialize the flow control address, type, and PAUSE timer  in igc_setup_link()
149 	 * registers to their default values.  This is done even if flow  in igc_setup_link()
153 	hw_dbg("Initializing the Flow Control address, type and timer regs\n");  in igc_setup_link()
167  * igc_force_mac_fc - Force the MAC's flow control settings
170  * Force the MAC's flow control settings.  Sets the TFCE and RFCE bits in the
186 	 * receive flow control.  in igc_force_mac_fc()
188 	 * The "Case" statement below enables/disable flow control  in igc_force_mac_fc()
192 	 *      0:  Flow control is completely disabled  in igc_force_mac_fc()
193 	 *      1:  Rx flow control is enabled (we can receive pause  in igc_force_mac_fc()
195 	 *      2:  Tx flow control is enabled (we can send pause frames  in igc_force_mac_fc()
197 	 *      3:  Both Rx and TX flow control (symmetric) is enabled.  in igc_force_mac_fc()
218 		hw_dbg("Flow control param set incorrectly\n");  in igc_force_mac_fc()
415 	/* Configure Flow Control now that Auto-Neg has completed.  in igc_check_for_copper_link()
416 	 * First, we need to restore the desired flow control  in igc_check_for_copper_link()
422 		hw_dbg("Error configuring flow control\n");  in igc_check_for_copper_link()
450  * igc_config_fc_after_link_up - Configures flow control after link
455  * flow control needs to be forced also.  If auto-negotiation is enabled
456  * and did not fail, then we configure flow control based on our link
476 		hw_dbg("Error forcing flow control settings\n");  in igc_config_fc_after_link_up()
483 	 * flow control configured.  in igc_config_fc_after_link_up()
508 		 * flow control was negotiated.  in igc_config_fc_after_link_up()
520 		 * Page Ability Register (Address 5) determine flow control  in igc_config_fc_after_link_up()
523 		 * 1999, describes these PAUSE resolution bits and how flow  in igc_config_fc_after_link_up()
540 		 * Symmetric Flow Control is enabled at both ends.  The  in igc_config_fc_after_link_up()
543 		 * For Symmetric Flow Control:  in igc_config_fc_after_link_up()
555 			 * FULL flow control because we could not advertise RX  in igc_config_fc_after_link_up()
561 				hw_dbg("Flow Control = FULL.\n");  in igc_config_fc_after_link_up()
564 				hw_dbg("Flow Control = RX PAUSE frames only.\n");  in igc_config_fc_after_link_up()
580 			hw_dbg("Flow Control = TX PAUSE frames only.\n");  in igc_config_fc_after_link_up()
594 			hw_dbg("Flow Control = RX PAUSE frames only.\n");  in igc_config_fc_after_link_up()
596 		/* Per the IEEE spec, at this point flow control should be  in igc_config_fc_after_link_up()
599 		 * desired flow control, but can be forced on the link  in igc_config_fc_after_link_up()
600 		 * partner.  So if we advertised no flow control, that is  in igc_config_fc_after_link_up()
602 		 * receive capability (Rx Pause Only or Full Flow Control)  in igc_config_fc_after_link_up()
604 		 * ourselves to enable Rx Flow Control only.  We can do  in igc_config_fc_after_link_up()
606 		 * didn't want flow control enabled, and we enable Rx, no  in igc_config_fc_after_link_up()
609 		 * flow control enabled, then by us enabling RX only, we  in igc_config_fc_after_link_up()
620 			hw_dbg("Flow Control = NONE.\n");  in igc_config_fc_after_link_up()
623 			hw_dbg("Flow Control = RX PAUSE frames only.\n");  in igc_config_fc_after_link_up()
627 		 * negotiated to HALF DUPLEX, flow control should not be  in igc_config_fc_after_link_up()
640 		 * controller to use the correct flow control settings.  in igc_config_fc_after_link_up()
644 			hw_dbg("Error forcing flow control settings\n");  in igc_config_fc_after_link_up()