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Date: Mon, 11 Dec 2006 09:41:36 -0500
From: Jeff Garzik <jgarzik@...ox.com>
To: "Kok, Auke" <auke-jan.h.kok@...el.com>
CC: netdev@...r.kernel.org,
"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
"Kok, Auke" <auke@...-projects.org>,
"Ronciak, John" <john.ronciak@...el.com>
Subject: Re: [PATCH 08/22] e1000: Fix all manageability workarounds
Kok, Auke wrote:
> + /* enable receiving management packets to the host */
> + /* this will probably generate destination unreachable messages
> + * from the host OS, but the packets will be handled on SMBUS */
> + if (adapter->hw.mac_type >= e1000_82571) {
> + manc |= E1000_MANC_EN_MNG2HOST;
> +#define E1000_MNG2HOST_PORT_623 (1 << 5)
> +#define E1000_MNG2HOST_PORT_664 (1 << 6)
> + manc2h |= E1000_MNG2HOST_PORT_623;
> + manc2h |= E1000_MNG2HOST_PORT_664;
> + E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
> + }
> +
> + E1000_WRITE_REG(&adapter->hw, MANC, manc);
NAK, test a management packet feature, not a mac type
> + }
> +}
> +
> +static void
> +e1000_release_manageability(struct e1000_adapter *adapter)
> +{
> + if (adapter->en_mng_pt) {
> + uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
> +
> + /* re-enable hardware interception of ARP */
> + manc |= E1000_MANC_ARP_EN;
> +
> + if (adapter->hw.mac_type >= e1000_82571)
> + manc &= ~E1000_MANC_EN_MNG2HOST;
ditto. can't you see how fragile the above code test is, when compared
with testing a feature bit?
> + /* don't explicitly have to mess with MANC2H since
> + * MANC has an enable disable that gates MANC2H */
> +
> + /* XXX stop the hardware watchdog ? */
> +
> + E1000_WRITE_REG(&adapter->hw, MANC, manc);
> + }
> +}
> +
> int
> e1000_up(struct e1000_adapter *adapter)
> {
> @@ -475,6 +522,7 @@ e1000_up(struct e1000_adapter *adapter)
> e1000_set_multi(netdev);
>
> e1000_restore_vlan(adapter);
> + e1000_init_manageability(adapter);
>
> e1000_configure_tx(adapter);
> e1000_setup_rctl(adapter);
> @@ -705,14 +753,7 @@ e1000_reset(struct e1000_adapter *adapte
> phy_data);
> }
>
> - if ((adapter->en_mng_pt) &&
> - (adapter->hw.mac_type >= e1000_82540) &&
> - (adapter->hw.mac_type < e1000_82571) &&
> - (adapter->hw.media_type == e1000_media_type_copper)) {
> - manc = E1000_READ_REG(&adapter->hw, MANC);
> - manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
> - E1000_WRITE_REG(&adapter->hw, MANC, manc);
> - }
> + e1000_release_manageability(adapter);
> }
>
> /**
> @@ -1078,22 +1119,13 @@ e1000_remove(struct pci_dev *pdev)
> {
> struct net_device *netdev = pci_get_drvdata(pdev);
> struct e1000_adapter *adapter = netdev_priv(netdev);
> - uint32_t manc;
> #ifdef CONFIG_E1000_NAPI
> int i;
> #endif
>
> flush_scheduled_work();
>
> - if (adapter->hw.mac_type >= e1000_82540 &&
> - adapter->hw.mac_type < e1000_82571 &&
> - adapter->hw.media_type == e1000_media_type_copper) {
> - manc = E1000_READ_REG(&adapter->hw, MANC);
> - if (manc & E1000_MANC_SMBUS_EN) {
> - manc |= E1000_MANC_ARP_EN;
> - E1000_WRITE_REG(&adapter->hw, MANC, manc);
> - }
> - }
> + e1000_release_manageability(adapter);
>
> /* Release control of h/w to f/w. If f/w is AMT enabled, this
> * would have already happened in close and is redundant. */
> @@ -3615,6 +3647,14 @@ e1000_update_stats(struct e1000_adapter
> adapter->phy_stats.receive_errors += phy_tmp;
> }
>
> + /* Management Stats */
> + if (adapter->hw.mac_type > e1000_82544) {
> + adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
> + adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
> + adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
> + }
test a feature bit
> spin_unlock_irqrestore(&adapter->stats_lock, flags);
> }
> #ifdef CONFIG_PCI_MSI
> @@ -5027,7 +5067,7 @@ e1000_suspend(struct pci_dev *pdev, pm_m
> {
> struct net_device *netdev = pci_get_drvdata(pdev);
> struct e1000_adapter *adapter = netdev_priv(netdev);
> - uint32_t ctrl, ctrl_ext, rctl, manc, status;
> + uint32_t ctrl, ctrl_ext, rctl, status;
> uint32_t wufc = adapter->wol;
> #ifdef CONFIG_PM
> int retval = 0;
> @@ -5096,16 +5136,12 @@ e1000_suspend(struct pci_dev *pdev, pm_m
> pci_enable_wake(pdev, PCI_D3cold, 0);
> }
>
> - if (adapter->hw.mac_type >= e1000_82540 &&
> - adapter->hw.mac_type < e1000_82571 &&
> - adapter->hw.media_type == e1000_media_type_copper) {
> - manc = E1000_READ_REG(&adapter->hw, MANC);
> - if (manc & E1000_MANC_SMBUS_EN) {
> - manc |= E1000_MANC_ARP_EN;
> - E1000_WRITE_REG(&adapter->hw, MANC, manc);
> - pci_enable_wake(pdev, PCI_D3hot, 1);
> - pci_enable_wake(pdev, PCI_D3cold, 1);
> - }
> + e1000_release_manageability(adapter);
> +
> + /* make sure adapter isn't asleep if manageability is enabled */
> + if (adapter->en_mng_pt) {
> + pci_enable_wake(pdev, PCI_D3hot, 1);
> + pci_enable_wake(pdev, PCI_D3cold, 1);
> }
>
> if (adapter->hw.phy_type == e1000_phy_igp_3)
> @@ -5131,7 +5167,7 @@ e1000_resume(struct pci_dev *pdev)
> {
> struct net_device *netdev = pci_get_drvdata(pdev);
> struct e1000_adapter *adapter = netdev_priv(netdev);
> - uint32_t manc, err;
> + uint32_t err;
>
> pci_set_power_state(pdev, PCI_D0);
> e1000_pci_restore_state(adapter);
> @@ -5151,19 +5187,13 @@ e1000_resume(struct pci_dev *pdev)
> e1000_reset(adapter);
> E1000_WRITE_REG(&adapter->hw, WUS, ~0);
>
> + e1000_init_manageability(adapter);
> +
> if (netif_running(netdev))
> e1000_up(adapter);
>
> netif_device_attach(netdev);
>
> - if (adapter->hw.mac_type >= e1000_82540 &&
> - adapter->hw.mac_type < e1000_82571 &&
> - adapter->hw.media_type == e1000_media_type_copper) {
> - manc = E1000_READ_REG(&adapter->hw, MANC);
> - manc &= ~(E1000_MANC_ARP_EN);
> - E1000_WRITE_REG(&adapter->hw, MANC, manc);
> - }
> -
> /* If the controller is 82573 and f/w is AMT, do not set
> * DRV_LOAD until the interface is up. For all other cases,
> * let the f/w know that the h/w is now under the control
> @@ -5264,7 +5294,8 @@ static void e1000_io_resume(struct pci_d
> {
> struct net_device *netdev = pci_get_drvdata(pdev);
> struct e1000_adapter *adapter = netdev->priv;
> - uint32_t manc, swsm;
> +
> + e1000_init_manageability(adapter);
>
> if (netif_running(netdev)) {
> if (e1000_up(adapter)) {
> @@ -5275,26 +5306,14 @@ static void e1000_io_resume(struct pci_d
>
> netif_device_attach(netdev);
>
> - if (adapter->hw.mac_type >= e1000_82540 &&
> - adapter->hw.mac_type < e1000_82571 &&
> - adapter->hw.media_type == e1000_media_type_copper) {
> - manc = E1000_READ_REG(&adapter->hw, MANC);
> - manc &= ~(E1000_MANC_ARP_EN);
> - E1000_WRITE_REG(&adapter->hw, MANC, manc);
> - }
> -
> - switch (adapter->hw.mac_type) {
> - case e1000_82573:
> - swsm = E1000_READ_REG(&adapter->hw, SWSM);
> - E1000_WRITE_REG(&adapter->hw, SWSM,
> - swsm | E1000_SWSM_DRV_LOAD);
> - break;
> - default:
> - break;
> - }
> + /* If the controller is 82573 and f/w is AMT, do not set
> + * DRV_LOAD until the interface is up. For all other cases,
> + * let the f/w know that the h/w is now under the control
> + * of the driver. */
> + if (adapter->hw.mac_type != e1000_82573 ||
> + !e1000_check_mng_mode(&adapter->hw))
> + e1000_get_hw_control(adapter);
ditto
> - if (netif_running(netdev))
> - mod_timer(&adapter->watchdog_timer, jiffies);
> }
>
> /* e1000_main.c */
>
>
>
> ---
> Auke Kok <auke-jan.h.kok@...el.com>
> -
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