| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 17 Feb 2010 03:01:59 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, gospo@...hat.com,
Nicholas Nunley <nicholasx.d.nunley@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next-2.6 PATCH 05/18] igb: Power down link when interface is down
From: Nick Nunley <nicholasx.d.nunley@...el.com>
This changes the behavior of the driver to power down the link
when the associated interface is down, unless management is enabled.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/igb/e1000_82575.c | 44 +++++++++++++++++++++++++++++++++++++++
drivers/net/igb/e1000_82575.h | 2 ++
drivers/net/igb/e1000_defines.h | 1 +
drivers/net/igb/e1000_phy.c | 35 +++++++++++++++++++++++++++++++
drivers/net/igb/e1000_phy.h | 2 ++
drivers/net/igb/igb.h | 1 +
drivers/net/igb/igb_ethtool.c | 16 ++++++++++++--
drivers/net/igb/igb_main.c | 39 +++++++++++++++++++++++++++--------
8 files changed, 129 insertions(+), 11 deletions(-)
diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c
index 59817bc..9d7fa2f 100644
--- a/drivers/net/igb/e1000_82575.c
+++ b/drivers/net/igb/e1000_82575.c
@@ -727,6 +727,34 @@ static s32 igb_check_for_link_82575(struct e1000_hw *hw)
}
/**
+ * igb_power_up_serdes_link_82575 - Power up the serdes link after shutdown
+ * @hw: pointer to the HW structure
+ **/
+void igb_power_up_serdes_link_82575(struct e1000_hw *hw)
+{
+ u32 reg;
+
+
+ if ((hw->phy.media_type != e1000_media_type_internal_serdes) &&
+ !igb_sgmii_active_82575(hw))
+ return;
+
+ /* Enable PCS to turn on link */
+ reg = rd32(E1000_PCS_CFG0);
+ reg |= E1000_PCS_CFG_PCS_EN;
+ wr32(E1000_PCS_CFG0, reg);
+
+ /* Power up the laser */
+ reg = rd32(E1000_CTRL_EXT);
+ reg &= ~E1000_CTRL_EXT_SDP3_DATA;
+ wr32(E1000_CTRL_EXT, reg);
+
+ /* flush the write to verify completion */
+ wrfl();
+ msleep(1);
+}
+
+/**
* igb_get_pcs_speed_and_duplex_82575 - Retrieve current speed/duplex
* @hw: pointer to the HW structure
* @speed: stores the current speed
@@ -1166,6 +1194,22 @@ out:
}
/**
+ * igb_power_down_phy_copper_82575 - Remove link during PHY power down
+ * @hw: pointer to the HW structure
+ *
+ * In the case of a PHY power down to save power, or to turn off link during a
+ * driver unload, or wake on lan is not enabled, remove the link.
+ **/
+void igb_power_down_phy_copper_82575(struct e1000_hw *hw)
+{
+ /* If the management interface is not enabled, then power down */
+ if (!(igb_enable_mng_pass_thru(hw) || igb_check_reset_block(hw)))
+ igb_power_down_phy_copper(hw);
+
+ return;
+}
+
+/**
* igb_clear_hw_cntrs_82575 - Clear device specific hardware counters
* @hw: pointer to the HW structure
*
diff --git a/drivers/net/igb/e1000_82575.h b/drivers/net/igb/e1000_82575.h
index bb53083..fbe1c99 100644
--- a/drivers/net/igb/e1000_82575.h
+++ b/drivers/net/igb/e1000_82575.h
@@ -29,6 +29,8 @@
#define _E1000_82575_H_
extern void igb_shutdown_serdes_link_82575(struct e1000_hw *hw);
+extern void igb_power_up_serdes_link_82575(struct e1000_hw *hw);
+extern void igb_power_down_phy_copper_82575(struct e1000_hw *hw);
extern void igb_rx_fifo_flush_82575(struct e1000_hw *hw);
#define ID_LED_DEFAULT_82575_SERDES ((ID_LED_DEF1_DEF2 << 12) | \
diff --git a/drivers/net/igb/e1000_defines.h b/drivers/net/igb/e1000_defines.h
index 6e036ae..c017150 100644
--- a/drivers/net/igb/e1000_defines.h
+++ b/drivers/net/igb/e1000_defines.h
@@ -481,6 +481,7 @@
/* PHY Control Register */
#define MII_CR_FULL_DUPLEX 0x0100 /* FDX =1, half duplex =0 */
#define MII_CR_RESTART_AUTO_NEG 0x0200 /* Restart auto negotiation */
+#define MII_CR_POWER_DOWN 0x0800 /* Power down */
#define MII_CR_AUTO_NEG_EN 0x1000 /* Auto Neg Enable */
#define MII_CR_LOOPBACK 0x4000 /* 0 = normal, 1 = loopback */
#define MII_CR_RESET 0x8000 /* 0 = normal, 1 = PHY reset */
diff --git a/drivers/net/igb/e1000_phy.c b/drivers/net/igb/e1000_phy.c
index 3670a66..cf1f323 100644
--- a/drivers/net/igb/e1000_phy.c
+++ b/drivers/net/igb/e1000_phy.c
@@ -1931,6 +1931,41 @@ s32 igb_phy_init_script_igp3(struct e1000_hw *hw)
}
/**
+ * igb_power_up_phy_copper - Restore copper link in case of PHY power down
+ * @hw: pointer to the HW structure
+ *
+ * In the case of a PHY power down to save power, or to turn off link during a
+ * driver unload, restore the link to previous settings.
+ **/
+void igb_power_up_phy_copper(struct e1000_hw *hw)
+{
+ u16 mii_reg = 0;
+
+ /* The PHY will retain its settings across a power down/up cycle */
+ hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);
+ mii_reg &= ~MII_CR_POWER_DOWN;
+ hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);
+}
+
+/**
+ * igb_power_down_phy_copper - Power down copper PHY
+ * @hw: pointer to the HW structure
+ *
+ * Power down PHY to save power when interface is down and wake on lan
+ * is not enabled.
+ **/
+void igb_power_down_phy_copper(struct e1000_hw *hw)
+{
+ u16 mii_reg = 0;
+
+ /* The PHY will retain its settings across a power down/up cycle */
+ hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);
+ mii_reg |= MII_CR_POWER_DOWN;
+ hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);
+ msleep(1);
+}
+
+/**
* igb_check_polarity_82580 - Checks the polarity.
* @hw: pointer to the HW structure
*
diff --git a/drivers/net/igb/e1000_phy.h b/drivers/net/igb/e1000_phy.h
index 555eb54..565a6db 100644
--- a/drivers/net/igb/e1000_phy.h
+++ b/drivers/net/igb/e1000_phy.h
@@ -60,6 +60,8 @@ s32 igb_setup_copper_link(struct e1000_hw *hw);
s32 igb_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data);
s32 igb_phy_has_link(struct e1000_hw *hw, u32 iterations,
u32 usec_interval, bool *success);
+void igb_power_up_phy_copper(struct e1000_hw *hw);
+void igb_power_down_phy_copper(struct e1000_hw *hw);
s32 igb_phy_init_script_igp3(struct e1000_hw *hw);
s32 igb_read_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 *data);
s32 igb_write_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 data);
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index 452a4de..0e0800d 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -358,6 +358,7 @@ extern void igb_alloc_rx_buffers_adv(struct igb_ring *, int);
extern void igb_update_stats(struct igb_adapter *);
extern bool igb_has_link(struct igb_adapter *adapter);
extern void igb_set_ethtool_ops(struct net_device *);
+extern void igb_power_up_link(struct igb_adapter *);
static inline s32 igb_reset_phy(struct e1000_hw *hw)
{
diff --git a/drivers/net/igb/igb_ethtool.c b/drivers/net/igb/igb_ethtool.c
index 4eea03b..4852883 100644
--- a/drivers/net/igb/igb_ethtool.c
+++ b/drivers/net/igb/igb_ethtool.c
@@ -1722,6 +1722,9 @@ static void igb_diag_test(struct net_device *netdev,
dev_info(&adapter->pdev->dev, "offline testing starting\n");
+ /* power up link for link test */
+ igb_power_up_link(adapter);
+
/* Link test performed before hardware reset so autoneg doesn't
* interfere with test result */
if (igb_link_test(adapter, &data[4]))
@@ -1745,6 +1748,8 @@ static void igb_diag_test(struct net_device *netdev,
eth_test->flags |= ETH_TEST_FL_FAILED;
igb_reset(adapter);
+ /* power up link for loopback test */
+ igb_power_up_link(adapter);
if (igb_loopback_test(adapter, &data[3]))
eth_test->flags |= ETH_TEST_FL_FAILED;
@@ -1763,9 +1768,14 @@ static void igb_diag_test(struct net_device *netdev,
dev_open(netdev);
} else {
dev_info(&adapter->pdev->dev, "online testing starting\n");
- /* Online tests */
- if (igb_link_test(adapter, &data[4]))
- eth_test->flags |= ETH_TEST_FL_FAILED;
+
+ /* PHY is powered down when interface is down */
+ if (!netif_carrier_ok(netdev)) {
+ data[4] = 0;
+ } else {
+ if (igb_link_test(adapter, &data[4]))
+ eth_test->flags |= ETH_TEST_FL_FAILED;
+ }
/* Online tests aren't run; pass by default */
data[0] = 0;
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index e40319e..0427e7c 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1114,6 +1114,29 @@ static void igb_configure(struct igb_adapter *adapter)
adapter->tx_queue_len = netdev->tx_queue_len;
}
+/**
+ * igb_power_up_link - Power up the phy/serdes link
+ * @adapter: address of board private structure
+ **/
+void igb_power_up_link(struct igb_adapter *adapter)
+{
+ if (adapter->hw.phy.media_type == e1000_media_type_copper)
+ igb_power_up_phy_copper(&adapter->hw);
+ else
+ igb_power_up_serdes_link_82575(&adapter->hw);
+}
+
+/**
+ * igb_power_down_link - Power down the phy/serdes link
+ * @adapter: address of board private structure
+ */
+static void igb_power_down_link(struct igb_adapter *adapter)
+{
+ if (adapter->hw.phy.media_type == e1000_media_type_copper)
+ igb_power_down_phy_copper_82575(&adapter->hw);
+ else
+ igb_shutdown_serdes_link_82575(&adapter->hw);
+}
/**
* igb_up - Open the interface and prepare it to handle traffic
@@ -1335,6 +1358,9 @@ void igb_reset(struct igb_adapter *adapter)
wr32(E1000_PCIEMISC,
reg & ~E1000_PCIEMISC_LX_DECISION);
}
+ if (!netif_running(adapter->netdev))
+ igb_power_down_link(adapter);
+
igb_update_mng_vlan(adapter);
/* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
@@ -1717,9 +1743,6 @@ static void __devexit igb_remove(struct pci_dev *pdev)
unregister_netdev(netdev);
- if (!igb_check_reset_block(hw))
- igb_reset_phy(hw);
-
igb_clear_interrupt_scheme(adapter);
#ifdef CONFIG_PCI_IOV
@@ -1995,7 +2018,7 @@ static int igb_open(struct net_device *netdev)
if (err)
goto err_setup_rx;
- /* e1000_power_up_phy(adapter); */
+ igb_power_up_link(adapter);
/* before we allocate an interrupt, we must be ready to handle it.
* Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
@@ -2037,7 +2060,7 @@ static int igb_open(struct net_device *netdev)
err_req_irq:
igb_release_hw_control(adapter);
- /* e1000_power_down_phy(adapter); */
+ igb_power_down_link(adapter);
igb_free_all_rx_resources(adapter);
err_setup_rx:
igb_free_all_tx_resources(adapter);
@@ -5820,7 +5843,9 @@ static int __igb_shutdown(struct pci_dev *pdev, bool *enable_wake)
*enable_wake = wufc || adapter->en_mng_pt;
if (!*enable_wake)
- igb_shutdown_serdes_link_82575(hw);
+ igb_power_down_link(adapter);
+ else
+ igb_power_up_link(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. */
@@ -5877,8 +5902,6 @@ static int igb_resume(struct pci_dev *pdev)
return -ENOMEM;
}
- /* e1000_power_up_phy(adapter); */
-
igb_reset(adapter);
/* let the f/w know that the h/w is now under the control of the
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists