mlx4_core: mtts resources units changed to offset

In the previous implementation mtts are managed by:
1. order     - log(mtt segments), 'mtt segment' groups several mtts together.
2. first_seg - segment location relative to mtt table.
In the current implementation:
1. order     - log(mtts) rather than segments
2. offset    - mtt index in mtt table

Note: The actual mtt allocation is made in segments but it is
      transparent to callers.

Rational: The mtt resource holders are not interested on how the allocation
          of mtt is done, but rather on how they will use it.

Signed-off-by: Marcel Apfelbaum <marcela@dev.mellanox.co.il>
Reviewed-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 3 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 3ef73b05e24e..65bb466c575f 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -272,8 +272,7 @@ struct mlx4_caps {
         int                     num_comp_vectors;
         int                     comp_pool;
         int                     num_mpts;
-        int                     num_mtt_segs;
-        int                     mtts_per_seg;
+        int                     num_mtts;
         int                     fmr_reserved_mtts;
         int                     reserved_mtts;
         int                     reserved_mrws;
@@ -323,7 +322,7 @@ struct mlx4_buf {
 };
 
 struct mlx4_mtt {
-        u32                     first_seg;
+        u32                     offset;
         int                     order;
         int                     page_shift;
 };