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Date: Wed, 16 Jun 2010 16:27:49 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, gospo@...hat.com, bphilips@...ell.com,
Bruce Allan <bruce.w.allan@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next-2.6 PATCH 6/8] e1000e: enable support for EEE on 82579
From: Bruce Allan <bruce.w.allan@...el.com>
This patch enables IEEE802.3az (a.k.a. Energy Efficient Ethernet) on the
new 82579 LOMs. An optional module parameter is provided to disable the
feature if desired.
Signed-off-by: Bruce Allan <bruce.w.allan@...el.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/e1000e/e1000.h | 1 +
drivers/net/e1000e/hw.h | 1 +
drivers/net/e1000e/ich8lan.c | 41 ++++++++++++++++++++++++++++++++++++++++-
drivers/net/e1000e/param.c | 28 ++++++++++++++++++++++++++++
4 files changed, 70 insertions(+), 1 deletions(-)
diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index 0e59f15..c233496 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -423,6 +423,7 @@ struct e1000_info {
#define FLAG2_IS_DISCARDING (1 << 2)
#define FLAG2_DISABLE_ASPM_L1 (1 << 3)
#define FLAG2_HAS_PHY_STATS (1 << 4)
+#define FLAG2_HAS_EEE (1 << 5)
#define E1000_RX_DESC_PS(R, i) \
(&(((union e1000_rx_desc_packet_split *)((R).desc))[i]))
diff --git a/drivers/net/e1000e/hw.h b/drivers/net/e1000e/hw.h
index 96116ce..eecb2ec 100644
--- a/drivers/net/e1000e/hw.h
+++ b/drivers/net/e1000e/hw.h
@@ -937,6 +937,7 @@ struct e1000_dev_spec_ich8lan {
bool kmrn_lock_loss_workaround_enabled;
struct e1000_shadow_ram shadow_ram[E1000_ICH8_SHADOW_RAM_WORDS];
bool nvm_k1_enabled;
+ bool eee_disable;
};
struct e1000_hw {
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index 8274499..5e55de0 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -131,6 +131,10 @@
/* PHY Power Management Control */
#define HV_PM_CTRL PHY_REG(770, 17)
+/* PHY Low Power Idle Control */
+#define I82579_LPI_CTRL PHY_REG(772, 20)
+#define I82579_LPI_CTRL_ENABLE_MASK 0x6000
+
/* Strapping Option Register - RO */
#define E1000_STRAP 0x0000C
#define E1000_STRAP_SMBUS_ADDRESS_MASK 0x00FE0000
@@ -569,6 +573,35 @@ static s32 e1000_init_mac_params_ich8lan(struct e1000_adapter *adapter)
}
/**
+ * e1000_set_eee_pchlan - Enable/disable EEE support
+ * @hw: pointer to the HW structure
+ *
+ * Enable/disable EEE based on setting in dev_spec structure. The bits in
+ * the LPI Control register will remain set only if/when link is up.
+ **/
+static s32 e1000_set_eee_pchlan(struct e1000_hw *hw)
+{
+ s32 ret_val = 0;
+ u16 phy_reg;
+
+ if (hw->phy.type != e1000_phy_82579)
+ goto out;
+
+ ret_val = e1e_rphy(hw, I82579_LPI_CTRL, &phy_reg);
+ if (ret_val)
+ goto out;
+
+ if (hw->dev_spec.ich8lan.eee_disable)
+ phy_reg &= ~I82579_LPI_CTRL_ENABLE_MASK;
+ else
+ phy_reg |= I82579_LPI_CTRL_ENABLE_MASK;
+
+ ret_val = e1e_wphy(hw, I82579_LPI_CTRL, phy_reg);
+out:
+ return ret_val;
+}
+
+/**
* e1000_check_for_copper_link_ich8lan - Check for link (Copper)
* @hw: pointer to the HW structure
*
@@ -625,6 +658,11 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
*/
e1000e_check_downshift(hw);
+ /* Enable/Disable EEE after link up */
+ ret_val = e1000_set_eee_pchlan(hw);
+ if (ret_val)
+ goto out;
+
/*
* If we are forcing speed/duplex, then we simply return since
* we have already determined whether we have link or not.
@@ -3820,7 +3858,8 @@ struct e1000_info e1000_pch2_info = {
| FLAG_HAS_FLASH
| FLAG_HAS_JUMBO_FRAMES
| FLAG_APME_IN_WUC,
- .flags2 = FLAG2_HAS_PHY_STATS,
+ .flags2 = FLAG2_HAS_PHY_STATS
+ | FLAG2_HAS_EEE,
.pba = 18,
.max_hw_frame_size = DEFAULT_JUMBO,
.get_variants = e1000_get_variants_ich8lan,
diff --git a/drivers/net/e1000e/param.c b/drivers/net/e1000e/param.c
index a150e48..a748460 100644
--- a/drivers/net/e1000e/param.c
+++ b/drivers/net/e1000e/param.c
@@ -161,6 +161,15 @@ E1000_PARAM(WriteProtectNVM, "Write-protect NVM [WARNING: disabling this can lea
E1000_PARAM(CrcStripping, "Enable CRC Stripping, disable if your BMC needs " \
"the CRC");
+/*
+ * Enable/disable EEE (a.k.a. IEEE802.3az)
+ *
+ * Valid Range: 0, 1
+ *
+ * Default Value: 1
+ */
+E1000_PARAM(EEE, "Enable/disable on parts that support the feature");
+
struct e1000_option {
enum { enable_option, range_option, list_option } type;
const char *name;
@@ -477,4 +486,23 @@ void __devinit e1000e_check_options(struct e1000_adapter *adapter)
}
}
}
+ { /* EEE for parts supporting the feature */
+ static const struct e1000_option opt = {
+ .type = enable_option,
+ .name = "EEE Support",
+ .err = "defaulting to Enabled",
+ .def = OPTION_ENABLED
+ };
+
+ if (adapter->flags2 & FLAG2_HAS_EEE) {
+ /* Currently only supported on 82579 */
+ if (num_EEE > bd) {
+ unsigned int eee = EEE[bd];
+ e1000_validate_option(&eee, &opt, adapter);
+ hw->dev_spec.ich8lan.eee_disable = !eee;
+ } else {
+ hw->dev_spec.ich8lan.eee_disable = !opt.def;
+ }
+ }
+ }
}
--
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