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| author |   Jack Morgenstein <jackm@dev.mellanox.co.il> | 2012-08-03 08:40:54 +0000 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2012-09-30 20:33:41 -0700 |
| commit | 992e8e6e8781b71fd475bd1fd0555da7dba59966 (patch) | |
| tree | 1b84b49303a9f4eff3644b90cf20848bca7beabc /drivers/net/ethernet/mellanox/mlx4/eq.c | |
| parent | mlx4_core: INIT/CLOSE port logic for IB ports in SR-IOV mode (diff) | |
| download | linux-dev-992e8e6e8781b71fd475bd1fd0555da7dba59966.tar.xz linux-dev-992e8e6e8781b71fd475bd1fd0555da7dba59966.zip | |
IB/mlx4: Miscellaneous adjustments for SR-IOV IB support
1. Allow only master to change node description.
2. Prevent AH leakage in send mads.
3. Take device part number from PCI structure, so that guests see the
VF part number (and not the PF part number).
4. Place the device revision ID into caps structure at startup.
5. SET_PORT in update_gids_task needs to go through wrapper on master.
6. In mlx4_ib_event(), PORT_MGMT_EVENT needs be handled in a work
queue on the master, since it propagates events to slaves using
GEN_EQE.
7. Do not support FMR on slaves.
8. Add spinlock to slave_event(), since it is called both in interrupt
context and in process context (due to 6 above, and also if
smp_snoop is used). This fix was found and implemented by Saeed
Mahameed <saeedm@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/eq.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/eq.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/eq.c b/drivers/net/ethernet/mellanox/mlx4/eq.c index c425826b1fc0..51c764901ad2 100644 --- a/drivers/net/ethernet/mellanox/mlx4/eq.c +++ b/drivers/net/ethernet/mellanox/mlx4/eq.c @@ -164,13 +164,16 @@ static void slave_event(struct mlx4_dev *dev, u8 slave, struct mlx4_eqe *eqe) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_slave_event_eq *slave_eq = &priv->mfunc.master.slave_eq; - struct mlx4_eqe *s_eqe = - &slave_eq->event_eqe[slave_eq->prod & (SLAVE_EVENT_EQ_SIZE - 1)]; + struct mlx4_eqe *s_eqe; + unsigned long flags; + spin_lock_irqsave(&slave_eq->event_lock, flags); + s_eqe = &slave_eq->event_eqe[slave_eq->prod & (SLAVE_EVENT_EQ_SIZE - 1)]; if ((!!(s_eqe->owner & 0x80)) ^ (!!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE))) { mlx4_warn(dev, "Master failed to generate an EQE for slave: %d. " "No free EQE on slave events queue\n", slave); + spin_unlock_irqrestore(&slave_eq->event_lock, flags); return; } @@ -183,6 +186,7 @@ static void slave_event(struct mlx4_dev *dev, u8 slave, struct mlx4_eqe *eqe) queue_work(priv->mfunc.master.comm_wq, &priv->mfunc.master.slave_event_work); + spin_unlock_irqrestore(&slave_eq->event_lock, flags); } static void mlx4_slave_event(struct mlx4_dev *dev, int slave, |