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IB/mlx4: Request alias GUID on demand

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Request GIDs from the SM on demand, i.e., when a VF actually needs them,
and release them when the GIDs are no longer in use.

In cloud environments, this is useful for GID migrations, in which a
GID is assigned to a VF on the destination HCA, while the VF on the
source HCA is shutdown (but the GID was not administratively released).

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Yishai Hadas 2015-03-03 17:28:49 +02:00 committed by Doug Ledford
parent f547960128
commit ee59fa0d7e
3 changed files with 75 additions and 0 deletions
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51
drivers/infiniband/hw/mlx4/alias_GUID.c
View File

@ -123,6 +123,57 @@ ib_sa_comp_mask mlx4_ib_get_aguid_comp_mask_from_ix(int index)
return IB_SA_COMP_MASK(4 + index);
}
void mlx4_ib_slave_alias_guid_event(struct mlx4_ib_dev *dev, int slave,
int port, int slave_init)
{
__be64 curr_guid, required_guid;
int record_num = slave / 8;
int index = slave % 8;
int port_index = port - 1;
unsigned long flags;
int do_work = 0;
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
if (dev->sriov.alias_guid.ports_guid[port_index].state_flags &
GUID_STATE_NEED_PORT_INIT)
goto unlock;
if (!slave_init) {
curr_guid = *(__be64 *)&dev->sriov.
alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].
all_recs[GUID_REC_SIZE * index];
if (curr_guid == cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL) ||
!curr_guid)
goto unlock;
required_guid = cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL);
} else {
required_guid = mlx4_get_admin_guid(dev->dev, slave, port);
if (required_guid == cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
goto unlock;
}
*(__be64 *)&dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].
all_recs[GUID_REC_SIZE * index] = required_guid;
dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].guid_indexes
|= mlx4_ib_get_aguid_comp_mask_from_ix(index);
dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].status
= MLX4_GUID_INFO_STATUS_IDLE;
/* set to run immediately */
dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].time_to_run = 0;
dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].
guids_retry_schedule[index] = 0;
do_work = 1;
unlock:
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags);
if (do_work)
mlx4_ib_init_alias_guid_work(dev, port_index);
}
/*
* Whenever new GUID is set/unset (guid table change) create event and
* notify the relevant slave (master also should be notified).

22
drivers/infiniband/hw/mlx4/main.c
View File

@ -2791,9 +2791,31 @@ static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
case MLX4_DEV_EVENT_SLAVE_INIT:
/* here, p is the slave id */
do_slave_init(ibdev, p, 1);
if (mlx4_is_master(dev)) {
int i;
for (i = 1; i <= ibdev->num_ports; i++) {
if (rdma_port_get_link_layer(&ibdev->ib_dev, i)
== IB_LINK_LAYER_INFINIBAND)
mlx4_ib_slave_alias_guid_event(ibdev,
p, i,
1);
}
}
return;
case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
if (mlx4_is_master(dev)) {
int i;
for (i = 1; i <= ibdev->num_ports; i++) {
if (rdma_port_get_link_layer(&ibdev->ib_dev, i)
== IB_LINK_LAYER_INFINIBAND)
mlx4_ib_slave_alias_guid_event(ibdev,
p, i,
0);
}
}
/* here, p is the slave id */
do_slave_init(ibdev, p, 0);
return;

2
drivers/infiniband/hw/mlx4/mlx4_ib.h
View File

@ -798,6 +798,8 @@ int add_sysfs_port_mcg_attr(struct mlx4_ib_dev *device, int port_num,
void del_sysfs_port_mcg_attr(struct mlx4_ib_dev *device, int port_num,
struct attribute *attr);
ib_sa_comp_mask mlx4_ib_get_aguid_comp_mask_from_ix(int index);
void mlx4_ib_slave_alias_guid_event(struct mlx4_ib_dev *dev, int slave,
int port, int slave_init);
int mlx4_ib_device_register_sysfs(struct mlx4_ib_dev *device) ;