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authorMarkus Stockhausen <stockhausen@collogia.de>2014-08-13 18:07:30 +0400
committerRoland Dreier <roland@purestorage.com>2014-09-19 21:07:03 +0400
commit50e2ec9105fe1045298924a6c7b9ce870a0b6c13 (patch)
tree3bc8e8bc20e8827b120e89329e2279d651fdc3c9 /drivers/infiniband
parent52addcf9d6669fa439387610bc65c92fa0980cef (diff)
downloadlinux-50e2ec9105fe1045298924a6c7b9ce870a0b6c13.tar.xz
IB/mlx4: Disable TSO for Connect-X rev. A0 HCAs
According to <http://marc.info/?t=138347640900004&r=1&w=2>, revision A0 of Connect-X does not correctly assemble TSO packets. Disable that feature on that hardware revision. Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mlx4/main.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index e1e558a3d692..20f731f08c7e 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -59,6 +59,7 @@
#define MLX4_IB_FLOW_MAX_PRIO 0xFFF
#define MLX4_IB_FLOW_QPN_MASK 0xFFFFFF
+#define MLX4_IB_CARD_REV_A0 0xA0
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("Mellanox ConnectX HCA InfiniBand driver");
@@ -158,7 +159,9 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
props->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM)
props->device_cap_flags |= IB_DEVICE_UD_IP_CSUM;
- if (dev->dev->caps.max_gso_sz && dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BLH)
+ if (dev->dev->caps.max_gso_sz &&
+ (dev->dev->rev_id != MLX4_IB_CARD_REV_A0) &&
+ (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BLH))
props->device_cap_flags |= IB_DEVICE_UD_TSO;
if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_RESERVED_LKEY)
props->device_cap_flags |= IB_DEVICE_LOCAL_DMA_LKEY;