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ixgbe: A fix to VF TX rate limit

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There is a need to configure MMW_SIZE in register RTTBCNRM with a correct
value (0x4 for non jumbo frames and 0x14 for jumbo frames support).
For 82599 the value is 0x4 and for X540 the value is 0x14.

Signed-off-by: Lior Levy <lior.levy@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Lior Levy 2011-06-25 00:09:08 -07:00 committed by Jeff Kirsher
parent a535c30e9e
commit 7555e83df3
2 changed files with 17 additions and 1 deletions
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16
drivers/net/ixgbe/ixgbe_sriov.c
View file

@ -605,6 +605,22 @@ static void ixgbe_set_vf_rate_limit(struct ixgbe_hw *hw, int vf, int tx_rate,
}
IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, 2*vf); /* vf Y uses queue 2*Y */
/*
* Set global transmit compensation time to the MMW_SIZE in RTTBCNRM
* register. Typically MMW_SIZE=0x014 if 9728-byte jumbo is supported
* and 0x004 otherwise.
*/
switch (hw->mac.type) {
case ixgbe_mac_82599EB:
IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRM, 0x4);
break;
case ixgbe_mac_X540:
IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRM, 0x14);
break;
default:
break;
}
IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);
}

2
drivers/net/ixgbe/ixgbe_type.h
View file

@ -534,7 +534,7 @@
#define IXGBE_RTTBCNRC_RF_INT_SHIFT 14
#define IXGBE_RTTBCNRC_RF_INT_MASK \
(IXGBE_RTTBCNRC_RF_DEC_MASK << IXGBE_RTTBCNRC_RF_INT_SHIFT)
#define IXGBE_RTTBCNRM 0x04980
/* FCoE DMA Context Registers */
#define IXGBE_FCPTRL 0x02410 /* FC User Desc. PTR Low */