mlx4: Changing interrupt scheme

Adding a pool of MSI-X vectors and EQs that can be used explicitly by mlx4_core
customers (mlx4_ib, mlx4_en). The consumers will assign their own names to the
interrupt vectors. Those vectors are not opened at mlx4 device initialization,
opened by demand.
Changed the max number of possible EQs according to the new scheme, no longer relies on
on number of cores.
The new functionality is exposed through mlx4_assign_eq() and mlx4_release_eq().
Customers that do not use the new API will get completion vectors as before.

Signed-off-by: Markuze Alex <markuze@mellanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index 0da5bb7285b4..67ee8dacae79 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -282,6 +282,11 @@ struct mlx4_sense {
         struct delayed_work     sense_poll;
 };
 
+struct mlx4_msix_ctl {
+        u64             pool_bm;
+        spinlock_t      pool_lock;
+};
+
 struct mlx4_priv {
         struct mlx4_dev         dev;
 
@@ -313,6 +318,7 @@ struct mlx4_priv {
         struct mlx4_port_info   port[MLX4_MAX_PORTS + 1];
         struct mlx4_sense       sense;
         struct mutex            port_mutex;
+        struct mlx4_msix_ctl    msix_ctl;
 };
 
 static inline struct mlx4_priv *mlx4_priv(struct mlx4_dev *dev)