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net/mlx4_core: Remove MCG in case it is attached to promiscuous QPs only

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In B0 steering mode if promiscuous QP asks to be detached from MCG entry,
and it is the only one in this entry then the entry will never be deleted.
This is a wrong behavior since we don't want to keep those entries after
the promiscuous QP becomes non-promiscuous. Therefore remove steering
entry containing only promiscuous QP.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Saeed Mahameed 2014-07-16 11:57:51 +03:00 committed by David S. Miller
parent 816e59846b
commit 1645a54082
1 changed files with 62 additions and 26 deletions
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88
drivers/net/ethernet/mellanox/mlx4/mcg.c
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@ -270,7 +270,7 @@ static int existing_steering_entry(struct mlx4_dev *dev, u8 port,
* we need to add it as a duplicate to this entry
* for future references */
list_for_each_entry(dqp, &entry->duplicates, list) {
if (qpn == pqp->qpn)
if (qpn == dqp->qpn)
return 0; /* qp is already duplicated */
}
@ -324,24 +324,22 @@ static bool check_duplicate_entry(struct mlx4_dev *dev, u8 port,
return true;
}
/* I a steering entry contains only promisc QPs, it can be removed. */
static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 port,
enum mlx4_steer_type steer,
unsigned int index, u32 tqpn)
/* Returns true if all the QPs != tqpn contained in this entry
* are Promisc QPs. Returns false otherwise.
*/
static bool promisc_steering_entry(struct mlx4_dev *dev, u8 port,
enum mlx4_steer_type steer,
unsigned int index, u32 tqpn,
u32 *members_count)
{
struct mlx4_steer *s_steer;
struct mlx4_cmd_mailbox *mailbox;
struct mlx4_mgm *mgm;
struct mlx4_steer_index *entry = NULL, *tmp_entry;
u32 qpn;
u32 members_count;
u32 m_count;
bool ret = false;
int i;
if (port < 1 || port > dev->caps.num_ports)
return NULL;
s_steer = &mlx4_priv(dev)->steer[port - 1];
return false;
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox))
@ -350,15 +348,43 @@ static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 port,
if (mlx4_READ_ENTRY(dev, index, mailbox))
goto out;
members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
for (i = 0; i < members_count; i++) {
qpn = be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK;
m_count = be32_to_cpu(mgm->members_count) & 0xffffff;
if (members_count)
*members_count = m_count;
for (i = 0; i < m_count; i++) {
u32 qpn = be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK;
if (!get_promisc_qp(dev, port, steer, qpn) && qpn != tqpn) {
/* the qp is not promisc, the entry can't be removed */
goto out;
}
}
/* All the qps currently registered for this entry are promiscuous,
ret = true;
out:
mlx4_free_cmd_mailbox(dev, mailbox);
return ret;
}
/* IF a steering entry contains only promisc QPs, it can be removed. */
static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 port,
enum mlx4_steer_type steer,
unsigned int index, u32 tqpn)
{
struct mlx4_steer *s_steer;
struct mlx4_steer_index *entry = NULL, *tmp_entry;
u32 members_count;
bool ret = false;
if (port < 1 || port > dev->caps.num_ports)
return NULL;
s_steer = &mlx4_priv(dev)->steer[port - 1];
if (!promisc_steering_entry(dev, port, steer, index,
tqpn, &members_count))
goto out;
/* All the qps currently registered for this entry are promiscuous,
* Checking for duplicates */
ret = true;
list_for_each_entry_safe(entry, tmp_entry, &s_steer->steer_entries[steer], list) {
@ -387,7 +413,6 @@ static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 port,
}
out:
mlx4_free_cmd_mailbox(dev, mailbox);
return ret;
}
@ -528,7 +553,7 @@ static int remove_promisc_qp(struct mlx4_dev *dev, u8 port,
struct mlx4_steer *s_steer;
struct mlx4_cmd_mailbox *mailbox;
struct mlx4_mgm *mgm;
struct mlx4_steer_index *entry;
struct mlx4_steer_index *entry, *tmp_entry;
struct mlx4_promisc_qp *pqp;
struct mlx4_promisc_qp *dqp;
u32 members_count;
@ -572,10 +597,10 @@ static int remove_promisc_qp(struct mlx4_dev *dev, u8 port,
goto out_mailbox;
if (!(mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)) {
/* remove the qp from all the steering entries*/
list_for_each_entry(entry,
&s_steer->steer_entries[steer],
list) {
/* Remove the QP from all the steering entries */
list_for_each_entry_safe(entry, tmp_entry,
&s_steer->steer_entries[steer],
list) {
found = false;
list_for_each_entry(dqp, &entry->duplicates, list) {
if (dqp->qpn == qpn) {
@ -600,6 +625,14 @@ static int remove_promisc_qp(struct mlx4_dev *dev, u8 port,
members_count =
be32_to_cpu(mgm->members_count) &
0xffffff;
if (!members_count) {
mlx4_warn(dev, "QP %06x wasn't found in entry %x mcount=0. deleting entry...\n",
qpn, entry->index);
list_del(&entry->list);
kfree(entry);
continue;
}
for (i = 0; i < members_count; ++i)
if ((be32_to_cpu(mgm->qp[i]) &
MGM_QPN_MASK) == qpn) {
@ -614,7 +647,7 @@ static int remove_promisc_qp(struct mlx4_dev *dev, u8 port,
goto out_mailbox;
}
/* copy the last QP in this MGM
/* Copy the last QP in this MGM
* over removed QP
*/
mgm->qp[loc] = mgm->qp[members_count - 1];
@ -1144,10 +1177,13 @@ int mlx4_qp_detach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
goto out;
}
/* if this pq is also a promisc qp, it shouldn't be removed */
/* If this QP is also a promisc QP, it shouldn't be removed only if
* at least one none promisc QP is also attached to this MCG
*/
if (prot == MLX4_PROT_ETH &&
check_duplicate_entry(dev, port, steer, index, qp->qpn))
goto out;
check_duplicate_entry(dev, port, steer, index, qp->qpn) &&
!promisc_steering_entry(dev, port, steer, index, qp->qpn, NULL))
goto out;
members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
for (i = 0; i < members_count; ++i)