e1000e: initialize manageability (IPMI) pass-through in 82574/82583

82574/82583 uses different registers/bits to setup manageability filters
than all other parts supported by e1000e; set them accordingly for IPMI
pass-through.  Rename the function to better reflect what it does.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 55 insertions, 9 deletions

diff --git a/drivers/net/e1000e/defines.h b/drivers/net/e1000e/defines.h
index 7f760aa9efe5..227147f09af2 100644
--- a/drivers/net/e1000e/defines.h
+++ b/drivers/net/e1000e/defines.h
@@ -138,6 +138,11 @@
 /* Enable MNG packets to host memory */
 #define E1000_MANC_EN_MNG2HOST   0x00200000
 
+#define E1000_MANC2H_PORT_623    0x00000020 /* Port 0x26f */
+#define E1000_MANC2H_PORT_664    0x00000040 /* Port 0x298 */
+#define E1000_MDEF_PORT_623      0x00000800 /* Port 0x26f */
+#define E1000_MDEF_PORT_664      0x00000400 /* Port 0x298 */
+
 /* Receive Control */
 #define E1000_RCTL_EN             0x00000002    /* enable */
 #define E1000_RCTL_SBP            0x00000004    /* store bad packet */
diff --git a/drivers/net/e1000e/hw.h b/drivers/net/e1000e/hw.h
index 8bdcd5f24eff..6f66c3721349 100644
--- a/drivers/net/e1000e/hw.h
+++ b/drivers/net/e1000e/hw.h
@@ -208,6 +208,8 @@ enum e1e_registers {
 
         E1000_KMRNCTRLSTA = 0x00034, /* MAC-PHY interface - RW */
         E1000_MANC2H    = 0x05860, /* Management Control To Host - RW */
+        E1000_MDEF_BASE = 0x05890, /* Management Decision Filters */
+#define E1000_MDEF(_n)   (E1000_MDEF_BASE + ((_n) * 4))
         E1000_SW_FW_SYNC = 0x05B5C, /* Software-Firmware Synchronization - RW */
         E1000_GCR       = 0x05B00, /* PCI-Ex Control */
         E1000_GCR2      = 0x05B64, /* PCI-Ex Control #2 */
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index ab79bec082f0..36473e6d07d6 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -2526,10 +2526,10 @@ static void e1000_restore_vlan(struct e1000_adapter *adapter)
         }
 }
 
-static void e1000_init_manageability(struct e1000_adapter *adapter)
+static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
 {
         struct e1000_hw *hw = &adapter->hw;
-        u32 manc, manc2h;
+        u32 manc, manc2h, mdef, i, j;
 
         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
                 return;
@@ -2543,10 +2543,49 @@ static void e1000_init_manageability(struct e1000_adapter *adapter)
          */
         manc |= E1000_MANC_EN_MNG2HOST;
         manc2h = er32(MANC2H);
-#define E1000_MNG2HOST_PORT_623 (1 << 5)
-#define E1000_MNG2HOST_PORT_664 (1 << 6)
-        manc2h |= E1000_MNG2HOST_PORT_623;
-        manc2h |= E1000_MNG2HOST_PORT_664;
+
+        switch (hw->mac.type) {
+        default:
+                manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
+                break;
+        case e1000_82574:
+        case e1000_82583:
+                /*
+                 * Check if IPMI pass-through decision filter already exists;
+                 * if so, enable it.
+                 */
+                for (i = 0, j = 0; i < 8; i++) {
+                        mdef = er32(MDEF(i));
+
+                        /* Ignore filters with anything other than IPMI ports */
+                        if (mdef & !(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
+                                continue;
+
+                        /* Enable this decision filter in MANC2H */
+                        if (mdef)
+                                manc2h |= (1 << i);
+
+                        j |= mdef;
+                }
+
+                if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
+                        break;
+
+                /* Create new decision filter in an empty filter */
+                for (i = 0, j = 0; i < 8; i++)
+                        if (er32(MDEF(i)) == 0) {
+                                ew32(MDEF(i), (E1000_MDEF_PORT_623 |
+                                               E1000_MDEF_PORT_664));
+                                manc2h |= (1 << 1);
+                                j++;
+                                break;
+                        }
+
+                if (!j)
+                        e_warn("Unable to create IPMI pass-through filter\n");
+                break;
+        }
+
         ew32(MANC2H, manc2h);
         ew32(MANC, manc);
 }
@@ -2961,7 +3000,7 @@ static void e1000_configure(struct e1000_adapter *adapter)
         e1000_set_multi(adapter->netdev);
 
         e1000_restore_vlan(adapter);
-        e1000_init_manageability(adapter);
+        e1000_init_manageability_pt(adapter);
 
         e1000_configure_tx(adapter);
         e1000_setup_rctl(adapter);
@@ -5104,7 +5143,7 @@ static int __e1000_resume(struct pci_dev *pdev)
 
         e1000e_reset(adapter);
 
-        e1000_init_manageability(adapter);
+        e1000_init_manageability_pt(adapter);
 
         if (netif_running(netdev))
                 e1000e_up(adapter);
@@ -5305,7 +5344,7 @@ static void e1000_io_resume(struct pci_dev *pdev)
         struct net_device *netdev = pci_get_drvdata(pdev);
         struct e1000_adapter *adapter = netdev_priv(netdev);
 
-        e1000_init_manageability(adapter);
+        e1000_init_manageability_pt(adapter);
 
         if (netif_running(netdev)) {
                 if (e1000e_up(adapter)) {