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ixgbe: Fix limitations on macvlan so we can support up to 63 offloaded devices

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This change is a fix of the macvlan offload so that we correctly handle
macvlan offloaded devices. Specifically we were configuring our limits based
on the assumption that we were going to max out the RSS indices for every
mode. As a result when we went to 15 or more macvlan interfaces we were
forced into the 2 queue RSS mode on VFs even though they could have still
supported 4.

This change splits the logic up so that we limit either the total number of
macvlan instances if DCB is enabled, or limit the number of RSS queues used
per macvlan (instead of per pool) if SR-IOV is enabled. By doing this we
can make best use of the part.

In addition I have increased the maximum number of supported interfaces to
63 with one queue per offloaded interface as this more closely reflects the
actual values supported by the interface.

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>
This commit is contained in:
Alexander Duyck
2017-11-22 10:56:40 -08:00
committed by Jeff Kirsher
parent ff815fb2cf
commit 4e039c1675
4 changed files with 34 additions and 43 deletions
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9
drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
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@@ -350,6 +350,9 @@ static bool ixgbe_set_dcb_sriov_queues(struct ixgbe_adapter *adapter)
if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
return false;
/* limit VMDq instances on the PF by number of Tx queues */
vmdq_i = min_t(u16, vmdq_i, MAX_TX_QUEUES / tcs);
/* Add starting offset to total pool count */
vmdq_i += adapter->ring_feature[RING_F_VMDQ].offset;
@@ -512,12 +515,14 @@ static bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
#ifdef IXGBE_FCOE
u16 fcoe_i = 0;
#endif
bool pools = (find_first_zero_bit(&adapter->fwd_bitmask, 32) > 1);
/* only proceed if SR-IOV is enabled */
if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
return false;
/* limit l2fwd RSS based on total Tx queue limit */
rss_i = min_t(u16, rss_i, MAX_TX_QUEUES / vmdq_i);
/* Add starting offset to total pool count */
vmdq_i += adapter->ring_feature[RING_F_VMDQ].offset;
@@ -525,7 +530,7 @@ static bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
vmdq_i = min_t(u16, IXGBE_MAX_VMDQ_INDICES, vmdq_i);
/* 64 pool mode with 2 queues per pool */
if ((vmdq_i > 32) || (vmdq_i > 16 && pools)) {
if (vmdq_i > 32) {
vmdq_m = IXGBE_82599_VMDQ_2Q_MASK;
rss_m = IXGBE_RSS_2Q_MASK;
rss_i = min_t(u16, rss_i, 2);