ixgbe: DCB: credit max only needs to be gt TSO size for 82598

The maximum credits per traffic class only needs to be greater
then the TSO size for 82598 devices. The 82599 devices do not
have this requirement so only do this test for 82598 devices.

Signed-off-by: John Fastabend <[email protected]>
Tested-by: Ross Brattain <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>

diff --git a/drivers/net/ixgbe/ixgbe_dcb.c b/drivers/net/ixgbe/ixgbe_dcb.c
index 0d44c6470ca36429ca020a0c81105fecbf6e0cdd..4f2f0ae673548a9a1019a3df57faba80927a4656 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_dcb.c
+++ b/drivers/net/ixgbe/ixgbe_dcb.c
@@ -42,7 +42,8 @@
  * It should be called only after the rules are checked by
  * ixgbe_dcb_check_config().
  */
-s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_dcb_config *dcb_config,
+s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
+                                  struct ixgbe_dcb_config *dcb_config,
                                   int max_frame, u8 direction)
 {
        struct tc_bw_alloc *p;
@@ -124,7 +125,8 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_dcb_config *dcb_config,
                         * credit may not be enough to send out a TSO
                         * packet in descriptor plane arbitration.
                         */
-                       if (credit_max &&
+                       if ((hw->mac.type == ixgbe_mac_82598EB) &&
+                           credit_max &&
                            (credit_max < MINIMUM_CREDIT_FOR_TSO))
                                credit_max = MINIMUM_CREDIT_FOR_TSO;
 

diff --git a/drivers/net/ixgbe/ixgbe_dcb.h b/drivers/net/ixgbe/ixgbe_dcb.h
index 0208a87b129e3d6d0bc1c64045964c661ed7e319..1cfe38ee16440e0a7c3d6fce1fb858ef18fd68c4 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_dcb.h
+++ b/drivers/net/ixgbe/ixgbe_dcb.h
@@ -150,7 +150,8 @@ struct ixgbe_dcb_config {
 /* DCB driver APIs */
 
 /* DCB credits calculation */
-s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_dcb_config *, int, u8);
+s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *,
+                                  struct ixgbe_dcb_config *, int, u8);
 
 /* DCB hw initialization */
 s32 ixgbe_dcb_hw_config(struct ixgbe_hw *, struct ixgbe_dcb_config *);

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index f374207e14b407cbd69a32ad344c1e7d146687b4..45d988741fe91cb926ce7c6002dd24998f916c09 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3366,9 +3366,9 @@ static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
                max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
 #endif
 
-       ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, max_frame,
+       ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
                                        DCB_TX_CONFIG);
-       ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, max_frame,
+       ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
                                        DCB_RX_CONFIG);
 
        /* reconfigure the hardware */