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| author | Yishai Hadas <yishaih@mellanox.com> | 2015-02-08 12:49:34 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-10 01:03:53 +0300 |
| commit | 35f05dabf95ac3ebc4c15bafd6833f7a3046e66f (patch) | |
| tree | a39bb7c432f4e36467e61b316050e41ecd408b1f /include/linux/mlx4 | |
| parent | 824c25c1abe70a527646056f6911d181facde9cc (diff) | |
| download | linux-35f05dabf95ac3ebc4c15bafd6833f7a3046e66f.tar.xz | |
IB/mlx4: Reset flow support for IB kernel ULPs
The driver exposes interfaces that directly relate to HW state. Upon fatal
error, consumers of these interfaces (ULPs) that rely on completion of
all their posted work-request could hang, thereby introducing dependencies
in shutdown order. To prevent this from happening, we manage the
relevant resources (CQs, QPs) that are used by the device. Upon a fatal error,
we now generate simulated completions for outstanding WQEs that were not
completed at the time the HW was reset.
It includes invoking the completion event handler for all involved CQs so that
the ULPs will poll those CQs. When polled we return simulated CQEs with
IB_WC_WR_FLUSH_ERR return code enabling ULPs to clean up their resources and
not wait forever for completions upon receiving remove_one.
The above change requires an extra check in the data path to make sure that when
device is in error state, the simulated CQEs will be returned and no further
WQEs will be posted.
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/mlx4')
| -rw-r--r-- | include/linux/mlx4/device.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index c116cb02475c..e4ebff7e9d02 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -689,6 +689,8 @@ struct mlx4_cq { void (*comp)(struct mlx4_cq *); void *priv; } tasklet_ctx; + int reset_notify_added; + struct list_head reset_notify; }; struct mlx4_qp { |