**/
s32 ngbe_start_hw(struct ngbe_hw *hw)
{
+ s32 err;
+
DEBUGFUNC("ngbe_start_hw");
/* Clear the VLAN filter table */
/* Clear statistics registers */
hw->mac.clear_hw_cntrs(hw);
+ /* Setup flow control */
+ err = hw->mac.setup_fc(hw);
+ if (err != 0 && err != NGBE_NOT_IMPLEMENTED) {
+ DEBUGOUT("Flow control setup failed, returning %d\n", err);
+ return err;
+ }
+
/* Clear adapter stopped flag */
hw->adapter_stopped = false;
return 0;
}
+/**
+ * ngbe_setup_fc_em - Set up flow control
+ * @hw: pointer to hardware structure
+ *
+ * Called at init time to set up flow control.
+ **/
+s32 ngbe_setup_fc_em(struct ngbe_hw *hw)
+{
+ s32 err = 0;
+ u16 reg_cu = 0;
+
+ DEBUGFUNC("ngbe_setup_fc");
+
+ /* Validate the requested mode */
+ if (hw->fc.strict_ieee && hw->fc.requested_mode == ngbe_fc_rx_pause) {
+ DEBUGOUT("ngbe_fc_rx_pause not valid in strict IEEE mode\n");
+ err = NGBE_ERR_INVALID_LINK_SETTINGS;
+ goto out;
+ }
+
+ /*
+ * 1gig parts do not have a word in the EEPROM to determine the
+ * default flow control setting, so we explicitly set it to full.
+ */
+ if (hw->fc.requested_mode == ngbe_fc_default)
+ hw->fc.requested_mode = ngbe_fc_full;
+
+ /*
+ * The possible values of fc.requested_mode are:
+ * 0: Flow control is completely disabled
+ * 1: Rx flow control is enabled (we can receive pause frames,
+ * but not send pause frames).
+ * 2: Tx flow control is enabled (we can send pause frames but
+ * we do not support receiving pause frames).
+ * 3: Both Rx and Tx flow control (symmetric) are enabled.
+ * other: Invalid.
+ */
+ switch (hw->fc.requested_mode) {
+ case ngbe_fc_none:
+ /* Flow control completely disabled by software override. */
+ break;
+ case ngbe_fc_tx_pause:
+ /*
+ * Tx Flow control is enabled, and Rx Flow control is
+ * disabled by software override.
+ */
+ if (hw->phy.type == ngbe_phy_mvl_sfi ||
+ hw->phy.type == ngbe_phy_yt8521s_sfi)
+ reg_cu |= MVL_FANA_ASM_PAUSE;
+ else
+ reg_cu |= 0x800; /*need to merge rtl and mvl on page 0*/
+ break;
+ case ngbe_fc_rx_pause:
+ /*
+ * Rx Flow control is enabled and Tx Flow control is
+ * disabled by software override. Since there really
+ * isn't a way to advertise that we are capable of RX
+ * Pause ONLY, we will advertise that we support both
+ * symmetric and asymmetric Rx PAUSE, as such we fall
+ * through to the fc_full statement. Later, we will
+ * disable the adapter's ability to send PAUSE frames.
+ */
+ case ngbe_fc_full:
+ /* Flow control (both Rx and Tx) is enabled by SW override. */
+ if (hw->phy.type == ngbe_phy_mvl_sfi ||
+ hw->phy.type == ngbe_phy_yt8521s_sfi)
+ reg_cu |= MVL_FANA_SYM_PAUSE;
+ else
+ reg_cu |= 0xC00; /*need to merge rtl and mvl on page 0*/
+ break;
+ default:
+ DEBUGOUT("Flow control param set incorrectly\n");
+ err = NGBE_ERR_CONFIG;
+ goto out;
+ }
+
+ err = hw->phy.set_pause_adv(hw, reg_cu);
+
+out:
+ return err;
+}
+
+/**
+ * ngbe_fc_enable - Enable flow control
+ * @hw: pointer to hardware structure
+ *
+ * Enable flow control according to the current settings.
+ **/
+s32 ngbe_fc_enable(struct ngbe_hw *hw)
+{
+ s32 err = 0;
+ u32 mflcn_reg, fccfg_reg;
+ u32 pause_time;
+ u32 fcrtl, fcrth;
+
+ DEBUGFUNC("ngbe_fc_enable");
+
+ /* Validate the water mark configuration */
+ if (!hw->fc.pause_time) {
+ err = NGBE_ERR_INVALID_LINK_SETTINGS;
+ goto out;
+ }
+
+ /* Low water mark of zero causes XOFF floods */
+ if ((hw->fc.current_mode & ngbe_fc_tx_pause) && hw->fc.high_water) {
+ if (!hw->fc.low_water ||
+ hw->fc.low_water >= hw->fc.high_water) {
+ DEBUGOUT("Invalid water mark configuration\n");
+ err = NGBE_ERR_INVALID_LINK_SETTINGS;
+ goto out;
+ }
+ }
+
+ /* Negotiate the fc mode to use */
+ hw->mac.fc_autoneg(hw);
+
+ /* Disable any previous flow control settings */
+ mflcn_reg = rd32(hw, NGBE_RXFCCFG);
+ mflcn_reg &= ~NGBE_RXFCCFG_FC;
+
+ fccfg_reg = rd32(hw, NGBE_TXFCCFG);
+ fccfg_reg &= ~NGBE_TXFCCFG_FC;
+ /*
+ * The possible values of fc.current_mode are:
+ * 0: Flow control is completely disabled
+ * 1: Rx flow control is enabled (we can receive pause frames,
+ * but not send pause frames).
+ * 2: Tx flow control is enabled (we can send pause frames but
+ * we do not support receiving pause frames).
+ * 3: Both Rx and Tx flow control (symmetric) are enabled.
+ * other: Invalid.
+ */
+ switch (hw->fc.current_mode) {
+ case ngbe_fc_none:
+ /*
+ * Flow control is disabled by software override or autoneg.
+ * The code below will actually disable it in the HW.
+ */
+ break;
+ case ngbe_fc_rx_pause:
+ /*
+ * Rx Flow control is enabled and Tx Flow control is
+ * disabled by software override. Since there really
+ * isn't a way to advertise that we are capable of RX
+ * Pause ONLY, we will advertise that we support both
+ * symmetric and asymmetric Rx PAUSE. Later, we will
+ * disable the adapter's ability to send PAUSE frames.
+ */
+ mflcn_reg |= NGBE_RXFCCFG_FC;
+ break;
+ case ngbe_fc_tx_pause:
+ /*
+ * Tx Flow control is enabled, and Rx Flow control is
+ * disabled by software override.
+ */
+ fccfg_reg |= NGBE_TXFCCFG_FC;
+ break;
+ case ngbe_fc_full:
+ /* Flow control (both Rx and Tx) is enabled by SW override. */
+ mflcn_reg |= NGBE_RXFCCFG_FC;
+ fccfg_reg |= NGBE_TXFCCFG_FC;
+ break;
+ default:
+ DEBUGOUT("Flow control param set incorrectly\n");
+ err = NGBE_ERR_CONFIG;
+ goto out;
+ }
+
+ /* Set 802.3x based flow control settings. */
+ wr32(hw, NGBE_RXFCCFG, mflcn_reg);
+ wr32(hw, NGBE_TXFCCFG, fccfg_reg);
+
+ /* Set up and enable Rx high/low water mark thresholds, enable XON. */
+ if ((hw->fc.current_mode & ngbe_fc_tx_pause) &&
+ hw->fc.high_water) {
+ fcrtl = NGBE_FCWTRLO_TH(hw->fc.low_water) |
+ NGBE_FCWTRLO_XON;
+ fcrth = NGBE_FCWTRHI_TH(hw->fc.high_water) |
+ NGBE_FCWTRHI_XOFF;
+ } else {
+ /*
+ * In order to prevent Tx hangs when the internal Tx
+ * switch is enabled we must set the high water mark
+ * to the Rx packet buffer size - 24KB. This allows
+ * the Tx switch to function even under heavy Rx
+ * workloads.
+ */
+ fcrtl = 0;
+ fcrth = rd32(hw, NGBE_PBRXSIZE) - 24576;
+ }
+ wr32(hw, NGBE_FCWTRLO, fcrtl);
+ wr32(hw, NGBE_FCWTRHI, fcrth);
+
+ /* Configure pause time */
+ pause_time = NGBE_RXFCFSH_TIME(hw->fc.pause_time);
+ wr32(hw, NGBE_FCXOFFTM, pause_time * 0x00010000);
+
+ /* Configure flow control refresh threshold value */
+ wr32(hw, NGBE_RXFCRFSH, hw->fc.pause_time / 2);
+
+out:
+ return err;
+}
+
+/**
+ * ngbe_negotiate_fc - Negotiate flow control
+ * @hw: pointer to hardware structure
+ * @adv_reg: flow control advertised settings
+ * @lp_reg: link partner's flow control settings
+ * @adv_sym: symmetric pause bit in advertisement
+ * @adv_asm: asymmetric pause bit in advertisement
+ * @lp_sym: symmetric pause bit in link partner advertisement
+ * @lp_asm: asymmetric pause bit in link partner advertisement
+ *
+ * Find the intersection between advertised settings and link partner's
+ * advertised settings
+ **/
+s32 ngbe_negotiate_fc(struct ngbe_hw *hw, u32 adv_reg, u32 lp_reg,
+ u32 adv_sym, u32 adv_asm, u32 lp_sym, u32 lp_asm)
+{
+ if ((!(adv_reg)) || (!(lp_reg))) {
+ DEBUGOUT("Local or link partner's advertised flow control "
+ "settings are NULL. Local: %x, link partner: %x\n",
+ adv_reg, lp_reg);
+ return NGBE_ERR_FC_NOT_NEGOTIATED;
+ }
+
+ if ((adv_reg & adv_sym) && (lp_reg & lp_sym)) {
+ /*
+ * Now we need to check if the user selected Rx ONLY
+ * of pause frames. In this case, we had to advertise
+ * FULL flow control because we could not advertise RX
+ * ONLY. Hence, we must now check to see if we need to
+ * turn OFF the TRANSMISSION of PAUSE frames.
+ */
+ if (hw->fc.requested_mode == ngbe_fc_full) {
+ hw->fc.current_mode = ngbe_fc_full;
+ DEBUGOUT("Flow Control = FULL.\n");
+ } else {
+ hw->fc.current_mode = ngbe_fc_rx_pause;
+ DEBUGOUT("Flow Control=RX PAUSE frames only\n");
+ }
+ } else if (!(adv_reg & adv_sym) && (adv_reg & adv_asm) &&
+ (lp_reg & lp_sym) && (lp_reg & lp_asm)) {
+ hw->fc.current_mode = ngbe_fc_tx_pause;
+ DEBUGOUT("Flow Control = TX PAUSE frames only.\n");
+ } else if ((adv_reg & adv_sym) && (adv_reg & adv_asm) &&
+ !(lp_reg & lp_sym) && (lp_reg & lp_asm)) {
+ hw->fc.current_mode = ngbe_fc_rx_pause;
+ DEBUGOUT("Flow Control = RX PAUSE frames only.\n");
+ } else {
+ hw->fc.current_mode = ngbe_fc_none;
+ DEBUGOUT("Flow Control = NONE.\n");
+ }
+ return 0;
+}
+
+/**
+ * ngbe_fc_autoneg_em - Enable flow control IEEE clause 37
+ * @hw: pointer to hardware structure
+ *
+ * Enable flow control according to IEEE clause 37.
+ **/
+STATIC s32 ngbe_fc_autoneg_em(struct ngbe_hw *hw)
+{
+ u8 technology_ability_reg = 0;
+ u8 lp_technology_ability_reg = 0;
+
+ hw->phy.get_adv_pause(hw, &technology_ability_reg);
+ hw->phy.get_lp_adv_pause(hw, &lp_technology_ability_reg);
+
+ return ngbe_negotiate_fc(hw, (u32)technology_ability_reg,
+ (u32)lp_technology_ability_reg,
+ NGBE_TAF_SYM_PAUSE, NGBE_TAF_ASM_PAUSE,
+ NGBE_TAF_SYM_PAUSE, NGBE_TAF_ASM_PAUSE);
+}
+
+/**
+ * ngbe_fc_autoneg - Configure flow control
+ * @hw: pointer to hardware structure
+ *
+ * Compares our advertised flow control capabilities to those advertised by
+ * our link partner, and determines the proper flow control mode to use.
+ **/
+void ngbe_fc_autoneg(struct ngbe_hw *hw)
+{
+ s32 err = NGBE_ERR_FC_NOT_NEGOTIATED;
+ u32 speed;
+ bool link_up;
+
+ DEBUGFUNC("ngbe_fc_autoneg");
+
+ /*
+ * AN should have completed when the cable was plugged in.
+ * Look for reasons to bail out. Bail out if:
+ * - FC autoneg is disabled, or if
+ * - link is not up.
+ */
+ if (hw->fc.disable_fc_autoneg) {
+ DEBUGOUT("Flow control autoneg is disabled");
+ goto out;
+ }
+
+ hw->mac.check_link(hw, &speed, &link_up, false);
+ if (!link_up) {
+ DEBUGOUT("The link is down");
+ goto out;
+ }
+
+ err = ngbe_fc_autoneg_em(hw);
+
+out:
+ if (err == 0) {
+ hw->fc.fc_was_autonegged = true;
+ } else {
+ hw->fc.fc_was_autonegged = false;
+ hw->fc.current_mode = hw->fc.requested_mode;
+ }
+}
+
/**
* ngbe_acquire_swfw_sync - Acquire SWFW semaphore
* @hw: pointer to hardware structure
mac->set_mac_anti_spoofing = ngbe_set_mac_anti_spoofing;
mac->set_vlan_anti_spoofing = ngbe_set_vlan_anti_spoofing;
+ /* Flow Control */
+ mac->fc_enable = ngbe_fc_enable;
+ mac->fc_autoneg = ngbe_fc_autoneg;
+ mac->setup_fc = ngbe_setup_fc_em;
+
/* Link */
mac->get_link_capabilities = ngbe_get_link_capabilities_em;
mac->check_link = ngbe_check_mac_link_em;
git.droids-corp.org / dpdk.git / blobdiff