From d5ffd75a27fade39ba5df3b07290c5a2c297b9bd Mon Sep 17 00:00:00 2001 From: Nicholas Nunley Date: Tue, 27 Apr 2010 19:47:49 -0700 Subject: [PATCH] ixgbe: disable MSI-X by default on certain Cisco adapters 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 Acked-by: John Ronciak Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/ixgbe/ixgbe.h | 4 ++++ drivers/net/ixgbe/ixgbe_main.c | 17 ++++++++++++++++- 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h index 79c35ae3718..ec6bcc0660c 100644 --- a/drivers/net/ixgbe/ixgbe.h +++ b/drivers/net/ixgbe/ixgbe.h @@ -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]; diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index 2ae5a5159ce..ff59f88dc7a 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -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; -- 2.20.1