IB/mlx4: Add IPoIB LSO support

Add TSO support to the mlx4_ib driver.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/mlx4/fw.c b/drivers/net/mlx4/fw.c
index f494c3e8bce3..d82f2751d2c7 100644
--- a/drivers/net/mlx4/fw.c
+++ b/drivers/net/mlx4/fw.c
@@ -133,6 +133,7 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
 #define QUERY_DEV_CAP_MAX_AV_OFFSET             0x27
 #define QUERY_DEV_CAP_MAX_REQ_QP_OFFSET         0x29
 #define QUERY_DEV_CAP_MAX_RES_QP_OFFSET         0x2b
+#define QUERY_DEV_CAP_MAX_GSO_OFFSET            0x2d
 #define QUERY_DEV_CAP_MAX_RDMA_OFFSET           0x2f
 #define QUERY_DEV_CAP_RSZ_SRQ_OFFSET            0x33
 #define QUERY_DEV_CAP_ACK_DELAY_OFFSET          0x35
@@ -215,6 +216,13 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
         dev_cap->max_requester_per_qp = 1 << (field & 0x3f);
         MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_RES_QP_OFFSET);
         dev_cap->max_responder_per_qp = 1 << (field & 0x3f);
+        MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_GSO_OFFSET);
+        field &= 0x1f;
+        if (!field)
+                dev_cap->max_gso_sz = 0;
+        else
+                dev_cap->max_gso_sz = 1 << field;
+
         MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_RDMA_OFFSET);
         dev_cap->max_rdma_global = 1 << (field & 0x3f);
         MLX4_GET(field, outbox, QUERY_DEV_CAP_ACK_DELAY_OFFSET);
@@ -377,6 +385,7 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
                  dev_cap->max_sq_desc_sz, dev_cap->max_sq_sg);
         mlx4_dbg(dev, "Max RQ desc size: %d, max RQ S/G: %d\n",
                  dev_cap->max_rq_desc_sz, dev_cap->max_rq_sg);
+        mlx4_dbg(dev, "Max GSO size: %d\n", dev_cap->max_gso_sz);
 
         dump_dev_cap_flags(dev, dev_cap->flags);