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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>
This commit is contained in:
John Fastabend 2015-05-26 08:23:33 -07:00 committed by Jeff Kirsher
parent 8cf6f497de
commit 7aac842596
1 changed files with 24 additions and 10 deletions
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34
drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
View File

@ -2594,18 +2594,35 @@ static int ixgbe_add_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
struct ixgbe_hw *hw = &adapter->hw;
struct ixgbe_fdir_filter *input;
union ixgbe_atr_input mask;
u8 queue;
int err;
if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
return -EOPNOTSUPP;
/*
* Don't allow programming if the action is a queue greater than
* the number of online Rx queues.
/* ring_cookie is a masked into a set of queues and ixgbe pools or
* we use the drop index.
*/
if ((fsp->ring_cookie != RX_CLS_FLOW_DISC) &&
(fsp->ring_cookie >= adapter->num_rx_queues))
return -EINVAL;
if (fsp->ring_cookie == RX_CLS_FLOW_DISC) {
queue = IXGBE_FDIR_DROP_QUEUE;
} else {
u32 ring = ethtool_get_flow_spec_ring(fsp->ring_cookie);
u8 vf = ethtool_get_flow_spec_ring_vf(fsp->ring_cookie);
if (!vf && (ring >= adapter->num_rx_queues))
return -EINVAL;
else if (vf &&
((vf > adapter->num_vfs) ||
ring >= adapter->num_rx_queues_per_pool))
return -EINVAL;
/* Map the ring onto the absolute queue index */
if (!vf)
queue = adapter->rx_ring[ring]->reg_idx;
else
queue = ((vf - 1) *
adapter->num_rx_queues_per_pool) + ring;
}
/* Don't allow indexes to exist outside of available space */
if (fsp->location >= ((1024 << adapter->fdir_pballoc) - 2)) {
@ -2683,10 +2700,7 @@ static int ixgbe_add_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
/* program filters to filter memory */
err = ixgbe_fdir_write_perfect_filter_82599(hw,
&input->filter, input->sw_idx,
(input->action == IXGBE_FDIR_DROP_QUEUE) ?
IXGBE_FDIR_DROP_QUEUE :
adapter->rx_ring[input->action]->reg_idx);
&input->filter, input->sw_idx, queue);
if (err)
goto err_out_w_lock;