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ixgbe: Allow flow director to use entire queue space
Flow director is exported to user space using the ethtool ntuple support. However, currently it only supports steering traffic to a subset of the queues in use by the hardware. This change allows flow director to specify queues that have been assigned to virtual functions by partitioning the ring_cookie into a 8bit VF specifier followed by 32bit queue index. At the moment we don't have any ethernet drivers with more than 2^32 queues on a single function as best I can tell and nor do I expect this to happen anytime soon. This way the ring_cookie's normal use for specifying a queue on a specific PCI function continues to work as expected. CC: Alex Duyck <alexander.h.duyck@redhat.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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@ -2594,18 +2594,35 @@ static int ixgbe_add_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
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struct ixgbe_hw *hw = &adapter->hw;
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struct ixgbe_fdir_filter *input;
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union ixgbe_atr_input mask;
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u8 queue;
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int err;
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if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
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return -EOPNOTSUPP;
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/*
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* Don't allow programming if the action is a queue greater than
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* the number of online Rx queues.
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/* ring_cookie is a masked into a set of queues and ixgbe pools or
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* we use the drop index.
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*/
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if ((fsp->ring_cookie != RX_CLS_FLOW_DISC) &&
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(fsp->ring_cookie >= adapter->num_rx_queues))
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return -EINVAL;
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if (fsp->ring_cookie == RX_CLS_FLOW_DISC) {
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queue = IXGBE_FDIR_DROP_QUEUE;
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} else {
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u32 ring = ethtool_get_flow_spec_ring(fsp->ring_cookie);
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u8 vf = ethtool_get_flow_spec_ring_vf(fsp->ring_cookie);
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if (!vf && (ring >= adapter->num_rx_queues))
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return -EINVAL;
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else if (vf &&
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((vf > adapter->num_vfs) ||
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ring >= adapter->num_rx_queues_per_pool))
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return -EINVAL;
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/* Map the ring onto the absolute queue index */
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if (!vf)
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queue = adapter->rx_ring[ring]->reg_idx;
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else
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queue = ((vf - 1) *
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adapter->num_rx_queues_per_pool) + ring;
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}
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/* Don't allow indexes to exist outside of available space */
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if (fsp->location >= ((1024 << adapter->fdir_pballoc) - 2)) {
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@ -2683,10 +2700,7 @@ static int ixgbe_add_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
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/* program filters to filter memory */
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err = ixgbe_fdir_write_perfect_filter_82599(hw,
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&input->filter, input->sw_idx,
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(input->action == IXGBE_FDIR_DROP_QUEUE) ?
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IXGBE_FDIR_DROP_QUEUE :
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adapter->rx_ring[input->action]->reg_idx);
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&input->filter, input->sw_idx, queue);
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if (err)
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goto err_out_w_lock;
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