e1000e: enable support for EEE on 82579

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@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/net/e1000e/param.c b/drivers/net/e1000e/param.c
index a150e48a117f..a74846097afd 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;
+                        }
+                }
+        }
 }