e1000e: specify max supported frame size in adapter struct

By putting the maximum frame size supported by the hardware into the
adapter structure, the change_mtu entry point function can be cleaned
up of checks for all the different max frame sizes supported by

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 31 insertions, 20 deletions

diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c
index 6c01a2072c87..8203964373ce 100644
--- a/drivers/net/e1000e/82571.c
+++ b/drivers/net/e1000e/82571.c
@@ -341,8 +341,10 @@ static s32 e1000_get_variants_82571(struct e1000_adapter *adapter)
                         if (e1000_read_nvm(&adapter->hw, NVM_INIT_3GIO_3, 1,
                                        &eeprom_data) < 0)
                                 break;
-                        if (eeprom_data & NVM_WORD1A_ASPM_MASK)
-                                adapter->flags &= ~FLAG_HAS_JUMBO_FRAMES;
+                        if (!(eeprom_data & NVM_WORD1A_ASPM_MASK)) {
+                                adapter->flags |= FLAG_HAS_JUMBO_FRAMES;
+                                adapter->max_hw_frame_size = DEFAULT_JUMBO;
+                        }
                 }
                 break;
         default:
@@ -1672,6 +1674,7 @@ struct e1000_info e1000_82571_info = {
                                   | FLAG_TARC_SPEED_MODE_BIT /* errata */
                                   | FLAG_APME_CHECK_PORT_B,
         .pba                    = 38,
+        .max_hw_frame_size      = DEFAULT_JUMBO,
         .get_variants           = e1000_get_variants_82571,
         .mac_ops                = &e82571_mac_ops,
         .phy_ops                = &e82_phy_ops_igp,
@@ -1688,6 +1691,7 @@ struct e1000_info e1000_82572_info = {
                                   | FLAG_HAS_CTRLEXT_ON_LOAD
                                   | FLAG_TARC_SPEED_MODE_BIT, /* errata */
         .pba                    = 38,
+        .max_hw_frame_size      = DEFAULT_JUMBO,
         .get_variants           = e1000_get_variants_82571,
         .mac_ops                = &e82571_mac_ops,
         .phy_ops                = &e82_phy_ops_igp,
@@ -1706,6 +1710,7 @@ struct e1000_info e1000_82573_info = {
                                   | FLAG_HAS_ERT
                                   | FLAG_HAS_SWSM_ON_LOAD,
         .pba                    = 20,
+        .max_hw_frame_size      = ETH_FRAME_LEN + ETH_FCS_LEN,
         .get_variants           = e1000_get_variants_82571,
         .mac_ops                = &e82571_mac_ops,
         .phy_ops                = &e82_phy_ops_m88,
@@ -1724,6 +1729,7 @@ struct e1000_info e1000_82574_info = {
                                   | FLAG_HAS_AMT
                                   | FLAG_HAS_CTRLEXT_ON_LOAD,
         .pba                    = 20,
+        .max_hw_frame_size      = ETH_FRAME_LEN + ETH_FCS_LEN,
         .get_variants           = e1000_get_variants_82571,
         .mac_ops                = &e82571_mac_ops,
         .phy_ops                = &e82_phy_ops_bm,
@@ -1740,6 +1746,7 @@ struct e1000_info e1000_82583_info = {
                                   | FLAG_HAS_AMT
                                   | FLAG_HAS_CTRLEXT_ON_LOAD,
         .pba                    = 20,
+        .max_hw_frame_size      = DEFAULT_JUMBO,
         .get_variants           = e1000_get_variants_82571,
         .mac_ops                = &e82571_mac_ops,
         .phy_ops                = &e82_phy_ops_bm,
diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index f37360aa12a8..b9dc612082e0 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -96,6 +96,8 @@ struct e1000_info;
 /* Number of packet split data buffers (not including the header buffer) */
 #define PS_PAGE_BUFFERS                 (MAX_PS_BUFFERS - 1)
 
+#define DEFAULT_JUMBO                   9234
+
 enum e1000_boards {
         board_82571,
         board_82572,
@@ -293,6 +295,7 @@ struct e1000_adapter {
         u32 eeprom_wol;
         u32 wol;
         u32 pba;
+        u32 max_hw_frame_size;
 
         bool fc_autoneg;
 
@@ -309,6 +312,7 @@ struct e1000_info {
         unsigned int            flags;
         unsigned int            flags2;
         u32                     pba;
+        u32                     max_hw_frame_size;
         s32                     (*get_variants)(struct e1000_adapter *);
         struct e1000_mac_operations *mac_ops;
         struct e1000_phy_operations *phy_ops;
diff --git a/drivers/net/e1000e/es2lan.c b/drivers/net/e1000e/es2lan.c
index 8964838c686b..6cc3bdf4acdb 100644
--- a/drivers/net/e1000e/es2lan.c
+++ b/drivers/net/e1000e/es2lan.c
@@ -1422,6 +1422,7 @@ struct e1000_info e1000_es2_info = {
                                   | FLAG_DISABLE_FC_PAUSE_TIME /* errata */
                                   | FLAG_TIPG_MEDIUM_FOR_80003ESLAN,
         .pba                    = 38,
+        .max_hw_frame_size      = DEFAULT_JUMBO,
         .get_variants           = e1000_get_variants_80003es2lan,
         .mac_ops                = &es2_mac_ops,
         .phy_ops                = &es2_phy_ops,
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index 6d1aab6316ba..b63d9878b0ac 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -382,6 +382,11 @@ static s32 e1000_get_variants_ich8lan(struct e1000_adapter *adapter)
         if (rc)
                 return rc;
 
+        if (adapter->hw.phy.type == e1000_phy_ife) {
+                adapter->flags &= ~FLAG_HAS_JUMBO_FRAMES;
+                adapter->max_hw_frame_size = ETH_FRAME_LEN + ETH_FCS_LEN;
+        }
+
         if ((adapter->hw.mac.type == e1000_ich8lan) &&
             (adapter->hw.phy.type == e1000_phy_igp_3))
                 adapter->flags |= FLAG_LSC_GIG_SPEED_DROP;
@@ -2595,6 +2600,7 @@ struct e1000_info e1000_ich8_info = {
                                   | FLAG_HAS_FLASH
                                   | FLAG_APME_IN_WUC,
         .pba                    = 8,
+        .max_hw_frame_size      = ETH_FRAME_LEN + ETH_FCS_LEN,
         .get_variants           = e1000_get_variants_ich8lan,
         .mac_ops                = &ich8_mac_ops,
         .phy_ops                = &ich8_phy_ops,
@@ -2613,6 +2619,7 @@ struct e1000_info e1000_ich9_info = {
                                   | FLAG_HAS_FLASH
                                   | FLAG_APME_IN_WUC,
         .pba                    = 10,
+        .max_hw_frame_size      = DEFAULT_JUMBO,
         .get_variants           = e1000_get_variants_ich8lan,
         .mac_ops                = &ich8_mac_ops,
         .phy_ops                = &ich8_phy_ops,
@@ -2631,6 +2638,7 @@ struct e1000_info e1000_ich10_info = {
                                   | FLAG_HAS_FLASH
                                   | FLAG_APME_IN_WUC,
         .pba                    = 10,
+        .max_hw_frame_size      = DEFAULT_JUMBO,
         .get_variants           = e1000_get_variants_ich8lan,
         .mac_ops                = &ich8_mac_ops,
         .phy_ops                = &ich8_phy_ops,
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index b7a46c513783..4072fbb6493d 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -4212,27 +4212,17 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
         struct e1000_adapter *adapter = netdev_priv(netdev);
         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
 
-        if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
-            (max_frame > MAX_JUMBO_FRAME_SIZE)) {
-                e_err("Invalid MTU setting\n");
+        /* Jumbo frame support */
+        if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
+            !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
+                e_err("Jumbo Frames not supported.\n");
                 return -EINVAL;
         }
 
-        /* Jumbo frame size limits */
-        if (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) {
-                if (!(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
-                        e_err("Jumbo Frames not supported.\n");
-                        return -EINVAL;
-                }
-                if (adapter->hw.phy.type == e1000_phy_ife) {
-                        e_err("Jumbo Frames not supported.\n");
-                        return -EINVAL;
-                }
-        }
-
-#define MAX_STD_JUMBO_FRAME_SIZE 9234
-        if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
-                e_err("MTU > 9216 not supported.\n");
+        /* Supported frame sizes */
+        if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
+            (max_frame > adapter->max_hw_frame_size)) {
+                e_err("Unsupported MTU setting\n");
                 return -EINVAL;
         }
 
@@ -4848,6 +4838,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
         adapter->flags2 = ei->flags2;
         adapter->hw.adapter = adapter;
         adapter->hw.mac.type = ei->mac;
+        adapter->max_hw_frame_size = ei->max_hw_frame_size;
         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
 
         mmio_start = pci_resource_start(pdev, 0);