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| author | John Fastabend | 2010-10-28 02:59:57 +0200 |
|---|---|---|
| committer | David S. Miller | 2010-10-28 19:19:00 +0200 |
| commit | 9806307a1c5a2a79e268ae4e78b437d38c8adf7f (patch) | |
| tree | 1a4ceada09e85a3cd9083790c6b16a16e99bb928 /drivers/net/ixgbe/ixgbe_dcb_82599.h | |
| parent | e1000e: Add check for reset flags before displaying reset message (diff) | |
| download | kernel-qcow2-linux-9806307a1c5a2a79e268ae4e78b437d38c8adf7f.tar.gz kernel-qcow2-linux-9806307a1c5a2a79e268ae4e78b437d38c8adf7f.tar.xz kernel-qcow2-linux-9806307a1c5a2a79e268ae4e78b437d38c8adf7f.zip | |
ixgbe: DCB, fix TX hang occurring in stress condition with PFC
The DCB credits refill quantum _must_ be greater than half the max
packet size. This is needed to guarantee that TX DMA operations
are not attempted during a pause state. Additionally, the min IFG
must be set correctly for DCB mode. If a DMA operation is
requested unexpectedly during the pause state the HW data
store may be corrupted leading to a DMA hang. The DMA hang
requires a reset to correct. This fixes the HW configuration
to avoid this condition.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_dcb_82599.h')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_dcb_82599.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ixgbe/ixgbe_dcb_82599.h b/drivers/net/ixgbe/ixgbe_dcb_82599.h index 18d7fbf6c292..3841649fb954 100644 --- a/drivers/net/ixgbe/ixgbe_dcb_82599.h +++ b/drivers/net/ixgbe/ixgbe_dcb_82599.h @@ -95,6 +95,9 @@ #define IXGBE_TXPBTHRESH_DCB 0xA /* THRESH value for DCB mode */ +/* SECTXMINIFG DCB */ +#define IXGBE_SECTX_DCB 0x00001F00 /* DCB TX Buffer IFG */ + /* DCB hardware-specific driver APIs */ |