IB/mlx4: Handle protocol field in multicast table
The newest device firmware stores IB vs. Ethernet protocol in two bits
in members_count field of multicast group table (0: Infiniband, 1:
Ethernet). When changing the QP members count for a multicast group,
it important not to reset this information. When calling multicast
attach first time, the protocol type should be specified. In this
patch we always set it IB, but in the future we will handle Ethernet
too. When looking for a QP, the protocol type shoud be checked too.
Signed-off-by: Aleksey Senin <alekseys@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/net/mlx4/mcg.c b/drivers/net/mlx4/mcg.c
index c4f88b7..79cf42d 100644
--- a/drivers/net/mlx4/mcg.c
+++ b/drivers/net/mlx4/mcg.c
@@ -95,7 +95,8 @@
* entry in hash chain and *mgm holds end of hash chain.
*/
static int find_mgm(struct mlx4_dev *dev,
- u8 *gid, struct mlx4_cmd_mailbox *mgm_mailbox,
+ u8 *gid, enum mlx4_protocol protocol,
+ struct mlx4_cmd_mailbox *mgm_mailbox,
u16 *hash, int *prev, int *index)
{
struct mlx4_cmd_mailbox *mailbox;
@@ -134,7 +135,8 @@
return err;
}
- if (!memcmp(mgm->gid, gid, 16))
+ if (!memcmp(mgm->gid, gid, 16) &&
+ be32_to_cpu(mgm->members_count) >> 30 == protocol)
return err;
*prev = *index;
@@ -146,7 +148,7 @@
}
int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
- int block_mcast_loopback)
+ int block_mcast_loopback, enum mlx4_protocol protocol)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_cmd_mailbox *mailbox;
@@ -165,7 +167,7 @@
mutex_lock(&priv->mcg_table.mutex);
- err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);
+ err = find_mgm(dev, gid, protocol, mailbox, &hash, &prev, &index);
if (err)
goto out;
@@ -187,7 +189,7 @@
memcpy(mgm->gid, gid, 16);
}
- members_count = be32_to_cpu(mgm->members_count);
+ members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
if (members_count == MLX4_QP_PER_MGM) {
mlx4_err(dev, "MGM at index %x is full.\n", index);
err = -ENOMEM;
@@ -207,7 +209,7 @@
else
mgm->qp[members_count++] = cpu_to_be32(qp->qpn & MGM_QPN_MASK);
- mgm->members_count = cpu_to_be32(members_count);
+ mgm->members_count = cpu_to_be32(members_count | (u32) protocol << 30);
err = mlx4_WRITE_MCG(dev, index, mailbox);
if (err)
@@ -242,7 +244,8 @@
}
EXPORT_SYMBOL_GPL(mlx4_multicast_attach);
-int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16])
+int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
+ enum mlx4_protocol protocol)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_cmd_mailbox *mailbox;
@@ -260,7 +263,7 @@
mutex_lock(&priv->mcg_table.mutex);
- err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);
+ err = find_mgm(dev, gid, protocol, mailbox, &hash, &prev, &index);
if (err)
goto out;
@@ -270,7 +273,7 @@
goto out;
}
- members_count = be32_to_cpu(mgm->members_count);
+ members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
for (loc = -1, i = 0; i < members_count; ++i)
if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn)
loc = i;
@@ -282,7 +285,7 @@
}
- mgm->members_count = cpu_to_be32(--members_count);
+ mgm->members_count = cpu_to_be32(--members_count | (u32) protocol << 30);
mgm->qp[loc] = mgm->qp[i - 1];
mgm->qp[i - 1] = 0;