[TG3]: add 5780 basic jumbo frame support

Add basic jumbo frames support for 5780. This chip supports jumbo frames
on the standard receive ring without the jumbo ring. The
TG3_FLAG_JUMBO_ENABLE is changed to TG3_FLAG_JUMBO_RING_ENABLE to
indicate using the jumbo ring on 5704 and older chips. A new
TG3_FLG2_JUMBO_CAPABLE flag is added to indicate jumbo frames support
with or without the jumbo ring.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 20 insertions, 13 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index b01f6a07e5e7..9188a9b3ba2e 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -90,7 +90,7 @@
 /* hardware minimum and maximum for a single frame's data payload */
 #define TG3_MIN_MTU                     60
 #define TG3_MAX_MTU(tp) \
-        (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS) ? 9000 : 1500)
+        ((tp->tg3_flags2 & TG3_FLG2_JUMBO_CAPABLE) ? 9000 : 1500)
 
 /* These numbers seem to be hard coded in the NIC firmware somehow.
  * You can't change the ring sizes, but you can change where you place
@@ -914,7 +914,7 @@ out:
         if ((tp->phy_id & PHY_ID_MASK) == PHY_ID_BCM5401) {
                 /* Cannot do read-modify-write on 5401 */
                 tg3_writephy(tp, MII_TG3_AUX_CTRL, 0x4c20);
-        } else if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS)) {
+        } else if (tp->tg3_flags2 & TG3_FLG2_JUMBO_CAPABLE) {
                 u32 phy_reg;
 
                 /* Set bit 14 with read-modify-write to preserve other bits */
@@ -926,7 +926,7 @@ out:
         /* Set phy register 0x10 bit 0 to high fifo elasticity to support
          * jumbo frames transmission.
          */
-        if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS)) {
+        if (tp->tg3_flags2 & TG3_FLG2_JUMBO_CAPABLE) {
                 u32 phy_reg;
 
                 if (!tg3_readphy(tp, MII_TG3_EXT_CTRL, &phy_reg))
@@ -3444,9 +3444,9 @@ static inline void tg3_set_mtu(struct net_device *dev, struct tg3 *tp,
         dev->mtu = new_mtu;
 
         if (new_mtu > ETH_DATA_LEN)
-                tp->tg3_flags |= TG3_FLAG_JUMBO_ENABLE;
+                tp->tg3_flags |= TG3_FLAG_JUMBO_RING_ENABLE;
         else
-                tp->tg3_flags &= ~TG3_FLAG_JUMBO_ENABLE;
+                tp->tg3_flags &= ~TG3_FLAG_JUMBO_RING_ENABLE;
 }
 
 static int tg3_change_mtu(struct net_device *dev, int new_mtu)
@@ -3588,7 +3588,7 @@ static void tg3_init_rings(struct tg3 *tp)
                                (i << RXD_OPAQUE_INDEX_SHIFT));
         }
 
-        if (tp->tg3_flags & TG3_FLAG_JUMBO_ENABLE) {
+        if (tp->tg3_flags & TG3_FLAG_JUMBO_RING_ENABLE) {
                 for (i = 0; i < TG3_RX_JUMBO_RING_SIZE; i++) {
                         struct tg3_rx_buffer_desc *rxd;
 
@@ -3609,7 +3609,7 @@ static void tg3_init_rings(struct tg3 *tp)
                         break;
         }
 
-        if (tp->tg3_flags & TG3_FLAG_JUMBO_ENABLE) {
+        if (tp->tg3_flags & TG3_FLAG_JUMBO_RING_ENABLE) {
                 for (i = 0; i < tp->rx_jumbo_pending; i++) {
                         if (tg3_alloc_rx_skb(tp, RXD_OPAQUE_RING_JUMBO,
                                              -1, i) < 0)
@@ -5277,7 +5277,7 @@ static int tg3_reset_hw(struct tg3 *tp)
         }
 #endif
 
-        if (!(tp->tg3_flags & TG3_FLAG_JUMBO_ENABLE)) {
+        if (tp->dev->mtu <= ETH_DATA_LEN) {
                 tw32(BUFMGR_MB_RDMA_LOW_WATER,
                      tp->bufmgr_config.mbuf_read_dma_low_water);
                 tw32(BUFMGR_MB_MACRX_LOW_WATER,
@@ -5352,7 +5352,7 @@ static int tg3_reset_hw(struct tg3 *tp)
                 /* Setup replenish threshold. */
                 tw32(RCVBDI_JUMBO_THRESH, tp->rx_jumbo_pending / 8);
 
-                if (tp->tg3_flags & TG3_FLAG_JUMBO_ENABLE) {
+                if (tp->tg3_flags & TG3_FLAG_JUMBO_RING_ENABLE) {
                         tw32(RCVDBDI_JUMBO_BD + TG3_BDINFO_HOST_ADDR + TG3_64BIT_REG_HIGH,
                              ((u64) tp->rx_jumbo_mapping >> 32));
                         tw32(RCVDBDI_JUMBO_BD + TG3_BDINFO_HOST_ADDR + TG3_64BIT_REG_LOW,
@@ -5413,7 +5413,7 @@ static int tg3_reset_hw(struct tg3 *tp)
         tw32_rx_mbox(MAILBOX_RCV_STD_PROD_IDX + TG3_64BIT_REG_LOW,
                      tp->rx_std_ptr);
 
-        tp->rx_jumbo_ptr = (tp->tg3_flags & TG3_FLAG_JUMBO_ENABLE) ?
+        tp->rx_jumbo_ptr = (tp->tg3_flags & TG3_FLAG_JUMBO_RING_ENABLE) ?
                                                 tp->rx_jumbo_pending : 0;
         tw32_rx_mbox(MAILBOX_RCV_JUMBO_PROD_IDX + TG3_64BIT_REG_LOW,
                      tp->rx_jumbo_ptr);
@@ -8991,6 +8991,11 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
         if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS)
                 tp->tg3_flags2 |= TG3_FLG2_HW_TSO;
 
+        if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5705 &&
+            GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5750 &&
+            GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5752)
+                tp->tg3_flags2 |= TG3_FLG2_JUMBO_CAPABLE;
+
         if (pci_find_capability(tp->pdev, PCI_CAP_ID_EXP) != 0)
                 tp->tg3_flags2 |= TG3_FLG2_PCI_EXPRESS;
 
@@ -9117,8 +9122,9 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
         /* Derive initial jumbo mode from MTU assigned in
          * ether_setup() via the alloc_etherdev() call
          */
-        if (tp->dev->mtu > ETH_DATA_LEN)
-                tp->tg3_flags |= TG3_FLAG_JUMBO_ENABLE;
+        if (tp->dev->mtu > ETH_DATA_LEN &&
+            GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5780)
+                tp->tg3_flags |= TG3_FLAG_JUMBO_RING_ENABLE;
 
         /* Determine WakeOnLan speed to use. */
         if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5700 ||
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 46fa105fce83..7cb2eefa7aad 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2125,7 +2125,7 @@ struct tg3 {
 #define TG3_FLAG_NO_TX_PSEUDO_CSUM      0x00100000
 #define TG3_FLAG_NO_RX_PSEUDO_CSUM      0x00200000
 #define TG3_FLAG_SERDES_WOL_CAP         0x00400000
-#define TG3_FLAG_JUMBO_ENABLE           0x00800000
+#define TG3_FLAG_JUMBO_RING_ENABLE      0x00800000
 #define TG3_FLAG_10_100_ONLY            0x01000000
 #define TG3_FLAG_PAUSE_AUTONEG          0x02000000
 #define TG3_FLAG_BROKEN_CHECKSUMS       0x10000000
@@ -2155,6 +2155,7 @@ struct tg3 {
 #define TG3_FLG2_5750_PLUS              0x00080000
 #define TG3_FLG2_PROTECTED_NVRAM        0x00100000
 #define TG3_FLG2_USING_MSI              0x00200000
+#define TG3_FLG2_JUMBO_CAPABLE          0x00400000
 
         u32                             split_mode_max_reqs;
 #define SPLIT_MODE_5704_MAX_REQ         3