[PATCH 26/30] IB/mlx4: Translate cache gid index to real index

Somnath Kotur
2015-02-19T22:02:41Z

From: Moni Shoua <monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

When QP is modified with path the given sgid_index is not necessarily
the index that HW knows. This is due to optimizations that can save
place in the HW table. Therefore, translation is required.

Signed-off-by: Moni Shoua <monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Somnath Kotur <somnath.kotur-laKkSmNT4hbQT0dZR+AlfA@public.gmane.org>
---
drivers/infiniband/hw/mlx4/qp.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 9731c07..b06e9fc 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1256,14 +1256,18 @@ static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
path->static_rate = 0;

if (ah->ah_flags & IB_AH_GRH) {
- if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) {
+ int real_sgid_index = mlx4_ib_gid_index_to_real_index(dev,
+ port,
+ ah->grh.sgid_index);
+
+ if (real_sgid_index >= dev->dev->caps.gid_table_len[port]) {
pr_err("sgid_index (%u) too large. max is %d\n",
- ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1);
+ real_sgid_index, dev->dev->caps.gid_table_len[port] - 1);
return -1;
}

path->grh_mylmc |= 1 << 7;
- path->mgid_index = ah->grh.sgid_index;
+ path->mgid_index = real_sgid_index;
path->hop_limit = ah->grh.hop_limit;
path->tclass_flowlabel =
cpu_to_be32((ah->grh.traffic_class << 20) |