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igb: when number of CPUs > 4 combine tx/rx queues to allow more queues

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This patch makes it so that nics such as 82576 and newer can support more
hardware queues when there are more than 4 cpus by combining a tx/rx queue
pair onto one interrupt so that 8 queue pairs can be supported and thus
allow for more queues.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck
2009-11-12 18:37:19 +00:00
committed by David S. Miller
parent 115f459a53
commit a99955fc06
2 changed files with 27 additions and 13 deletions
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9
drivers/net/igb/igb.h
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@@ -59,10 +59,10 @@ struct igb_adapter;
#define MAX_Q_VECTORS 8
/* Transmit and receive queues */
#define IGB_MAX_RX_QUEUES (adapter->vfs_allocated_count ? \
(adapter->vfs_allocated_count > 6 ? 1 : 2) : 4)
#define IGB_MAX_TX_QUEUES IGB_MAX_RX_QUEUES
#define IGB_ABS_MAX_TX_QUEUES 4
#define IGB_MAX_RX_QUEUES (adapter->vfs_allocated_count ? 2 : \
(hw->mac.type > e1000_82575 ? 8 : 4))
#define IGB_ABS_MAX_TX_QUEUES 8
#define IGB_MAX_TX_QUEUES IGB_MAX_RX_QUEUES
#define IGB_MAX_VF_MC_ENTRIES 30
#define IGB_MAX_VF_FUNCTIONS 8
@@ -315,6 +315,7 @@ struct igb_adapter {
u16 rx_ring_count;
unsigned int vfs_allocated_count;
struct vf_data_storage *vf_data;
u32 rss_queues;
};
#define IGB_FLAG_HAS_MSI (1 << 0)