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ixgbe: Refactor MSI-X allocation mechanism

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Our current MSI-X allocation mechanism does not support new hardware
at all.  It also isn't getting the actual number of supported MSI-X vectors
from the device.

This patch allows the number of MSI-X vectors to be specific to a device,
plus it gets the number of MSI-X vectors available from PCIe configuration
space.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@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:
Peter P Waskiewicz Jr
2009-02-01 01:18:58 -08:00
committed by David S. Miller
parent 2f21bdd354
commit eb7f139ce5
4 changed files with 42 additions and 3 deletions
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9
drivers/net/ixgbe/ixgbe_main.c
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@@ -2421,7 +2421,13 @@ static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
ixgbe_set_num_queues(adapter);
} else {
adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
adapter->num_msix_vectors = vectors;
/*
* Adjust for only the vectors we'll use, which is minimum
* of max_msix_q_vectors + NON_Q_VECTORS, or the number of
* vectors we were allocated.
*/
adapter->num_msix_vectors = min(vectors,
adapter->max_msix_q_vectors + NON_Q_VECTORS);
}
}
@@ -2746,6 +2752,7 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
adapter->ring_feature[RING_F_RSS].indices = rss;
adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
#ifdef CONFIG_IXGBE_DCB
/* Configure DCB traffic classes */