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i40e: Replace ring container array with linked list

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This replaces the ring container array with a linked list.  The idea is
to make the logic much easier to deal with since this will allow us to
call a simple helper function from the q_vectors to go through the
entire list.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck
2013-09-28 06:00:53 +00:00
committed by Jeff Kirsher
parent 493fb30011
commit cd0b6fa656
3 changed files with 59 additions and 54 deletions
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21
drivers/net/ethernet/intel/i40e/i40e_txrx.c
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@ -1100,27 +1100,28 @@ int i40e_napi_poll(struct napi_struct *napi, int budget)
struct i40e_q_vector *q_vector =
container_of(napi, struct i40e_q_vector, napi);
struct i40e_vsi *vsi = q_vector->vsi;
struct i40e_ring *ring;
bool clean_complete = true;
int budget_per_ring;
int i;
if (test_bit(__I40E_DOWN, &vsi->state)) {
napi_complete(napi);
return 0;
}
/* We attempt to distribute budget to each Rx queue fairly, but don't
* allow the budget to go below 1 because that would exit polling early.
* Since the actual Tx work is minimal, we can give the Tx a larger
/* Since the actual Tx work is minimal, we can give the Tx a larger
* budget and be more aggressive about cleaning up the Tx descriptors.
*/
i40e_for_each_ring(ring, q_vector->tx)
clean_complete &= i40e_clean_tx_irq(ring, vsi->work_limit);
/* We attempt to distribute budget to each Rx queue fairly, but don't
* allow the budget to go below 1 because that would exit polling early.
*/
budget_per_ring = max(budget/q_vector->num_ringpairs, 1);
for (i = 0; i < q_vector->num_ringpairs; i++) {
clean_complete &= i40e_clean_tx_irq(q_vector->tx.ring[i],
vsi->work_limit);
clean_complete &= i40e_clean_rx_irq(q_vector->rx.ring[i],
budget_per_ring);
}
i40e_for_each_ring(ring, q_vector->rx)
clean_complete &= i40e_clean_rx_irq(ring, budget_per_ring);
/* If work not completed, return budget and polling will return */
if (!clean_complete)