diff options
| author | Peter Waskiewicz <peter.p.waskiewicz.jr@intel.com> | 2010-10-05 01:27:49 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-06 23:48:09 -0700 |
| commit | b25ebfd21b03b3b59c1c7a7e0c597fd28286bb10 (patch) | |
| tree | 2a7cabafb223a741dcd5e7b833a941ee59d53b20 /drivers/net/ixgbe | |
| parent | 9deec17f9fe260f1b6467748fe5e16feea8e98f0 (diff) | |
| download | blackbird-op-linux-b25ebfd21b03b3b59c1c7a7e0c597fd28286bb10.tar.gz blackbird-op-linux-b25ebfd21b03b3b59c1c7a7e0c597fd28286bb10.zip | |
ixgbe: Use affinity_hint when Flow Director is enabled
Use the new infrastructure to balance interrupts for flow
alignment when ATR or Flow Director are enabled.
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ixgbe')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe.h | 2 | ||||
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_main.c | 25 |
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h index 5cebc3755b64..a8c47b01a6fa 100644 --- a/drivers/net/ixgbe/ixgbe.h +++ b/drivers/net/ixgbe/ixgbe.h @@ -31,6 +31,7 @@ #include <linux/types.h> #include <linux/pci.h> #include <linux/netdevice.h> +#include <linux/cpumask.h> #include <linux/aer.h> #include "ixgbe_type.h" @@ -241,6 +242,7 @@ struct ixgbe_q_vector { u8 tx_itr; u8 rx_itr; u32 eitr; + cpumask_var_t affinity_mask; }; /* Helper macros to switch between ints/sec and what the register uses. diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index c35e13c01dbe..95dbf60c8169 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -1433,6 +1433,21 @@ static void ixgbe_configure_msix(struct ixgbe_adapter *adapter) q_vector->eitr = adapter->rx_eitr_param; ixgbe_write_eitr(q_vector); + /* If Flow Director is enabled, set interrupt affinity */ + if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) || + (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) { + /* + * Allocate the affinity_hint cpumask, assign the mask + * for this vector, and set our affinity_hint for + * this irq. + */ + if (!alloc_cpumask_var(&q_vector->affinity_mask, + GFP_KERNEL)) + return; + cpumask_set_cpu(v_idx, q_vector->affinity_mask); + irq_set_affinity_hint(adapter->msix_entries[v_idx].vector, + q_vector->affinity_mask); + } } if (adapter->hw.mac.type == ixgbe_mac_82598EB) @@ -3816,6 +3831,7 @@ void ixgbe_down(struct ixgbe_adapter *adapter) u32 rxctrl; u32 txdctl; int i, j; + int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; /* signal that we are down to the interrupt handler */ set_bit(__IXGBE_DOWN, &adapter->state); @@ -3854,6 +3870,15 @@ void ixgbe_down(struct ixgbe_adapter *adapter) ixgbe_napi_disable_all(adapter); + /* Cleanup the affinity_hint CPU mask memory and callback */ + for (i = 0; i < num_q_vectors; i++) { + struct ixgbe_q_vector *q_vector = adapter->q_vector[i]; + /* clear the affinity_mask in the IRQ descriptor */ + irq_set_affinity_hint(adapter->msix_entries[i]. vector, NULL); + /* release the CPU mask memory */ + free_cpumask_var(q_vector->affinity_mask); + } + if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE || adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) cancel_work_sync(&adapter->fdir_reinit_task); |
