1838  * configuration and flow control settings. Clears all on-chip counters. Leaves
1976 	/* Call a subroutine to configure the link and setup flow control. */  in e1000_init_hw()
2052  * Configures flow control and link settings.
2056  * Determines which flow control settings to use. Calls the apropriate media-
2057  * specific link configuration function. Configures the flow control settings.
2080 	 * that determine the hardware's default PAUSE (flow control) mode,  in e1000_setup_link()
2083 	 * SW defined pins. If there is no SW over-ride of the flow  in e1000_setup_link()
2121 	/* We want to save off the original Flow Control configuration just  in e1000_setup_link()
2123 	 * hub or switch with different Flow Control capabilities.  in e1000_setup_link()
2157 	/* Initialize the flow control address, type, and PAUSE timer  in e1000_setup_link()
2158 	 * registers to their default values.  This is done even if flow  in e1000_setup_link()
2162 	DEBUGOUT("Initializing the Flow Control address, type"  in e1000_setup_link()
2174 	/* Set the flow control receive threshold registers.  Normally,  in e1000_setup_link()
2236 	/* Check for a software override of the flow control settings, and setup  in e1000_setup_fiber_link()
2241 	 * configure the two flow control enable bits in the CTRL register.  in e1000_setup_fiber_link()
2244 	 *	0:  Flow control is completely disabled  in e1000_setup_fiber_link()
2245 	 *	1:  Rx flow control is enabled (we can receive pause frames, but  in e1000_setup_fiber_link()
2247 	 *	2:  Tx flow control is enabled (we can send pause frames but we do  in e1000_setup_fiber_link()
2249 	 *	3:  Both Rx and TX flow control (symmetric) are enabled.  in e1000_setup_fiber_link()
2253 		/* Flow control is completely disabled by a software over-ride. */  in e1000_setup_fiber_link()
2257 		/* RX Flow control is enabled and TX Flow control is disabled by a  in e1000_setup_fiber_link()
2266 		/* TX Flow control is enabled, and RX Flow control is disabled, by a  in e1000_setup_fiber_link()
2272 		/* Flow control (both RX and TX) is enabled by a software over-ride. */  in e1000_setup_fiber_link()
2276 		DEBUGOUT("Flow control param set incorrectly\n");  in e1000_setup_fiber_link()
2284 	 * link-up status bit will be set and the flow control enable bits (RFCE  in e1000_setup_fiber_link()
3124 * Setup auto-negotiation and flow control advertisements,
3199 *   2) Set up flow control on the MAC to that established with
3222 		DEBUGOUT("Error Configuring Flow Control\n");  in e1000_copper_link_postconfig()
3303 	/* Setup autoneg and flow control advertisement  in e1000_setup_copper_link()
3337 * Configures PHY autoneg and flow control advertisement settings
3416 	/* Check for a software override of the flow control settings, and  in e1000_phy_setup_autoneg()
3423 	 *	0:  Flow control is completely disabled  in e1000_phy_setup_autoneg()
3424 	 *	1:  Rx flow control is enabled (we can receive pause frames  in e1000_phy_setup_autoneg()
3426 	 *	2:  Tx flow control is enabled (we can send pause frames  in e1000_phy_setup_autoneg()
3428 	 *	3:  Both Rx and TX flow control (symmetric) are enabled.  in e1000_phy_setup_autoneg()
3429 	 *  other:  No software override.  The flow control configuration  in e1000_phy_setup_autoneg()
3434 		/* Flow control (RX & TX) is completely disabled by a  in e1000_phy_setup_autoneg()
3440 		/* RX Flow control is enabled, and TX Flow control is  in e1000_phy_setup_autoneg()
3452 		/* TX Flow control is enabled, and RX Flow control is  in e1000_phy_setup_autoneg()
3459 		/* Flow control (both RX and TX) is enabled by a software  in e1000_phy_setup_autoneg()
3465 		DEBUGOUT("Flow control param set incorrectly\n");  in e1000_phy_setup_autoneg()
3566  * Forces the MAC's flow control settings.
3589 	 * receive flow control.  in e1000_force_mac_fc()
3591 	 * The "Case" statement below enables/disable flow control  in e1000_force_mac_fc()
3595 	 *	0:  Flow control is completely disabled  in e1000_force_mac_fc()
3596 	 *	1:  Rx flow control is enabled (we can receive pause  in e1000_force_mac_fc()
3598 	 *	2:  Tx flow control is enabled (we can send pause frames  in e1000_force_mac_fc()
3600 	 *	3:  Both Rx and TX flow control (symmetric) is enabled.  in e1000_force_mac_fc()
3620 		DEBUGOUT("Flow control param set incorrectly\n");  in e1000_force_mac_fc()
3624 	/* Disable TX Flow Control for 82542 (rev 2.0) */  in e1000_force_mac_fc()
3633  * Configures flow control settings after link is established
3638  * Forces MAC flow control settings if link was forced. When in MII/GMII mode
3639  * and autonegotiation is enabled, the MAC flow control settings will be set
3640  * based on the flow control negotiated by the PHY. In TBI mode, the TFCE
3641  * and RFCE bits will be automaticaly set to the negotiated flow control mode.
3666 			DEBUGOUT("Error forcing flow control settings\n");  in e1000_config_fc_after_link_up()
3674 	 * flow control configured.  in e1000_config_fc_after_link_up()
3694 			 * Register (Address 5) to determine how flow control was  in e1000_config_fc_after_link_up()
3711 			 * Page Ability Register (Address 5) determine flow control  in e1000_config_fc_after_link_up()
3714 			 * 1999, describes these PAUSE resolution bits and how flow  in e1000_config_fc_after_link_up()
3732 			 * Symmetric Flow Control is enabled at both ends.  The  in e1000_config_fc_after_link_up()
3735 			 * For Symmetric Flow Control:  in e1000_config_fc_after_link_up()
3747 				 * FULL flow control because we could not advertise RX  in e1000_config_fc_after_link_up()
3753 					DEBUGOUT("Flow Control = FULL.\r\n");  in e1000_config_fc_after_link_up()
3757 					    ("Flow Control = RX PAUSE frames only.\r\n");  in e1000_config_fc_after_link_up()
3775 				    ("Flow Control = TX PAUSE frames only.\r\n");  in e1000_config_fc_after_link_up()
3792 				    ("Flow Control = RX PAUSE frames only.\r\n");  in e1000_config_fc_after_link_up()
3794 			/* Per the IEEE spec, at this point flow control should be  in e1000_config_fc_after_link_up()
3797 			 * desired flow control, but can be forced on the link  in e1000_config_fc_after_link_up()
3798 			 * partner.  So if we advertised no flow control, that is  in e1000_config_fc_after_link_up()
3800 			 * receive capability (Rx Pause Only or Full Flow Control)  in e1000_config_fc_after_link_up()
3802 			 * ourselves to enable Rx Flow Control only.  We can do  in e1000_config_fc_after_link_up()
3804 			 * didn't want flow control enabled, and we enable Rx, no  in e1000_config_fc_after_link_up()
3807 			 * flow control enabled, then by us enabling RX only, we  in e1000_config_fc_after_link_up()
3817 				DEBUGOUT("Flow Control = NONE.\r\n");  in e1000_config_fc_after_link_up()
3821 				    ("Flow Control = RX PAUSE frames only.\r\n");  in e1000_config_fc_after_link_up()
3825 			 * negotiated to HALF DUPLEX, flow control should not be  in e1000_config_fc_after_link_up()
3834 			 * controller to use the correct flow control settings.  in e1000_config_fc_after_link_up()
3839 				    ("Error forcing flow control settings\n");  in e1000_config_fc_after_link_up()
3932 		/* Configure Flow Control now that Auto-Neg has completed. First, we  in e1000_check_for_link()
3933 		 * need to restore the desired flow control settings because we may  in e1000_check_for_link()
3938 			DEBUGOUT("Error configuring flow control\n");  in e1000_check_for_link()
4012 		/* Configure Flow Control after forcing link up. */  in e1000_check_for_link()
4015 			DEBUGOUT("Error configuring flow control\n");  in e1000_check_for_link()
5099 	/* flow control settings */  in e1000_sw_init()