diff options
| author | Vipul Pandya <vipul@chelsio.com> | 2012-05-18 15:29:30 +0530 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2012-05-18 13:22:33 -0700 |
| commit | 422eea0a8cf658bc9564726d74e8384b89a8f4fa (patch) | |
| tree | 6c2ad0bf5112cfef2cd5bb025468cc3318d337d0 /drivers/infiniband/hw/cxgb4/iw_cxgb4.h | |
| parent | 4984037bef54253d4d010d3e57f175ab694bee26 (diff) | |
| download | lwn-422eea0a8cf658bc9564726d74e8384b89a8f4fa.tar.gz lwn-422eea0a8cf658bc9564726d74e8384b89a8f4fa.zip | |
RDMA/cxgb4: DB Drop Recovery for RDMA and LLD queues
Add module option db_fc_threshold which is the count of active QPs
that trigger automatic db flow control mode. Automatically transition
to/from flow control mode when the active qp count crosses
db_fc_theshold.
Add more db debugfs stats
On DB DROP event from the LLD, recover all the iwarp queues.
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/cxgb4/iw_cxgb4.h')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/iw_cxgb4.h | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h index e8b88a02cc77..6818659f2617 100644 --- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h +++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h @@ -120,6 +120,7 @@ struct c4iw_stats { u64 db_full; u64 db_empty; u64 db_drop; + u64 db_state_transitions; }; struct c4iw_rdev { @@ -212,6 +213,7 @@ struct c4iw_dev { struct mutex db_mutex; struct dentry *debugfs_root; enum db_state db_state; + int qpcnt; }; static inline struct c4iw_dev *to_c4iw_dev(struct ib_device *ibdev) @@ -271,11 +273,25 @@ static inline int insert_handle_nolock(struct c4iw_dev *rhp, struct idr *idr, return _insert_handle(rhp, idr, handle, id, 0); } -static inline void remove_handle(struct c4iw_dev *rhp, struct idr *idr, u32 id) +static inline void _remove_handle(struct c4iw_dev *rhp, struct idr *idr, + u32 id, int lock) { - spin_lock_irq(&rhp->lock); + if (lock) + spin_lock_irq(&rhp->lock); idr_remove(idr, id); - spin_unlock_irq(&rhp->lock); + if (lock) + spin_unlock_irq(&rhp->lock); +} + +static inline void remove_handle(struct c4iw_dev *rhp, struct idr *idr, u32 id) +{ + _remove_handle(rhp, idr, id, 1); +} + +static inline void remove_handle_nolock(struct c4iw_dev *rhp, + struct idr *idr, u32 id) +{ + _remove_handle(rhp, idr, id, 0); } struct c4iw_pd { @@ -843,5 +859,7 @@ void c4iw_ev_dispatch(struct c4iw_dev *dev, struct t4_cqe *err_cqe); extern struct cxgb4_client t4c_client; extern c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS]; extern int c4iw_max_read_depth; +extern int db_fc_threshold; + #endif |