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ixgbe: disable MSI-X by default on certain Cisco adapters

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Due to an errata in 82598 parts MSI-X needs to be disabled
in certain ixgbe devices designed to transfer peer-to-peer
traffic on the PCIe bus. This patch sets the default
interrupt type to MSI rather than MSI-X for specific Cisco
ixgbe adapters.

Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Acked-by: John Ronciak <john.ronciak@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:
Nicholas Nunley 2010-04-27 19:47:49 -07:00 committed by David S. Miller
parent afe0159d93
commit d5ffd75a27
2 changed files with 20 additions and 1 deletions
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4
drivers/net/ixgbe/ixgbe.h
View file

@ -104,6 +104,10 @@
#define MAX_EMULATION_MAC_ADDRS 16
#define VMDQ_P(p) ((p) + adapter->num_vfs)
#define IXGBE_SUBDEV_ID_82598AF_MEZZ 0x0049
#define IXGBE_SUBDEV_ID_82598AF_MENLO_Q_MEZZ 0x004a
#define IXGBE_SUBDEV_ID_82598AF_MENLO_E_MEZZ 0x004b
struct vf_data_storage {
unsigned char vf_mac_addresses[ETH_ALEN];
u16 vf_mc_hashes[IXGBE_MAX_VF_MC_ENTRIES];

17
drivers/net/ixgbe/ixgbe_main.c
View file

@ -4314,6 +4314,9 @@ static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
int err = 0;
int vector, v_budget;
if (!(adapter->flags & IXGBE_FLAG_MSIX_CAPABLE))
goto try_msi;
/*
* It's easy to be greedy for MSI-X vectors, but it really
* doesn't do us much good if we have a lot more vectors
@ -4345,7 +4348,7 @@ static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
goto out;
}
try_msi:
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
@ -4626,6 +4629,18 @@ 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->flags |= IXGBE_FLAG_MSIX_CAPABLE;
if (adapter->hw.device_id == IXGBE_DEV_ID_82598AF_DUAL_PORT) {
switch (adapter->hw.subsystem_device_id) {
case IXGBE_SUBDEV_ID_82598AF_MEZZ:
case IXGBE_SUBDEV_ID_82598AF_MENLO_Q_MEZZ:
case IXGBE_SUBDEV_ID_82598AF_MENLO_E_MEZZ:
adapter->flags &= ~IXGBE_FLAG_MSIX_CAPABLE;
break;
default:
break;
}
}
if (hw->mac.type == ixgbe_mac_82598EB) {
if (hw->device_id == IXGBE_DEV_ID_82598AT)
adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;