ixgbe: Support 4 queue RSS on VFs with 1 or 2 queue RSS on PF
Instead of limiting the VFs if we don't use 4 queues for RSS in the PF we
can instead just limit the RSS queues used to a power of 2. By doing this
we can support use cases where VFs are using more queues than the PF is
currently using and can support RSS if so desired.
The only limitation on this is that we cannot support 3 queues of RSS in
the PF or VF. In either of these cases we should fall back to 2 queues in
order to be able to use the power of 2 masking provided by the psrtype
register.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 1c88858..a244d9a 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -3248,7 +3248,8 @@
mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
else if (tcs > 1)
mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
- else if (adapter->ring_feature[RING_F_RSS].indices == 4)
+ else if (adapter->ring_feature[RING_F_VMDQ].mask ==
+ IXGBE_82599_VMDQ_4Q_MASK)
mtqc |= IXGBE_MTQC_32VF;
else
mtqc |= IXGBE_MTQC_64VF;
@@ -3475,12 +3476,12 @@
u32 reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
- /* Program table for at least 2 queues w/ SR-IOV so that VFs can
+ /* Program table for at least 4 queues w/ SR-IOV so that VFs can
* make full use of any rings they may have. We will use the
* PSRTYPE register to control how many rings we use within the PF.
*/
- if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 2))
- rss_i = 2;
+ if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 4))
+ rss_i = 4;
/* Fill out hash function seeds */
for (i = 0; i < 10; i++)
@@ -3544,7 +3545,8 @@
mrqc = IXGBE_MRQC_VMDQRT8TCEN; /* 8 TCs */
else if (tcs > 1)
mrqc = IXGBE_MRQC_VMDQRT4TCEN; /* 4 TCs */
- else if (adapter->ring_feature[RING_F_RSS].indices == 4)
+ else if (adapter->ring_feature[RING_F_VMDQ].mask ==
+ IXGBE_82599_VMDQ_4Q_MASK)
mrqc = IXGBE_MRQC_VMDQRSS32EN;
else
mrqc = IXGBE_MRQC_VMDQRSS64EN;