From: Guy Levi <guyle@mellanox.com>
Date: Thu, 2 Nov 2017 15:22:25 +0200
Subject: IB/mlx4: Add contig support for control objects
Patch-mainline: v4.15-rc1
Git-commit: ed8637d3615b38bd4d12ba5eb8ee6a0c3888e754
References: bsc#1071218
Taking advantage of the optimization which was introduced in previous
commit ("IB/mlx4: Use optimal numbers of MTT entries") to optimize the
MTT usage for QP and CQ.
Signed-off-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/mlx4/cq.c | 8 ++++++--
drivers/infiniband/hw/mlx4/mlx4_ib.h | 2 ++
drivers/infiniband/hw/mlx4/mr.c | 5 ++---
drivers/infiniband/hw/mlx4/qp.c | 8 ++++++--
4 files changed, 16 insertions(+), 7 deletions(-)
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -140,14 +140,18 @@ static int mlx4_ib_get_cq_umem(struct ml
{
int err;
int cqe_size = dev->dev->caps.cqe_size;
+ int shift;
+ int n;
*umem = ib_umem_get(context, buf_addr, cqe * cqe_size,
IB_ACCESS_LOCAL_WRITE, 1);
if (IS_ERR(*umem))
return PTR_ERR(*umem);
- err = mlx4_mtt_init(dev->dev, ib_umem_page_count(*umem),
- (*umem)->page_shift, &buf->mtt);
+ n = ib_umem_page_count(*umem);
+ shift = mlx4_ib_umem_calc_optimal_mtt_size(*umem, 0, &n);
+ err = mlx4_mtt_init(dev->dev, n, shift, &buf->mtt);
+
if (err)
goto err_buf;
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -935,5 +935,7 @@ struct ib_rwq_ind_table
struct ib_rwq_ind_table_init_attr *init_attr,
struct ib_udata *udata);
int mlx4_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *wq_ind_table);
+int mlx4_ib_umem_calc_optimal_mtt_size(struct ib_umem *umem, u64 start_va,
+ int *num_of_mtts);
#endif /* MLX4_IB_H */
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -254,9 +254,8 @@ out:
* middle already handled as part of mtt shift calculation for both their start
* & end addresses.
*/
-static int mlx4_ib_umem_calc_optimal_mtt_size(struct ib_umem *umem,
- u64 start_va,
- int *num_of_mtts)
+int mlx4_ib_umem_calc_optimal_mtt_size(struct ib_umem *umem, u64 start_va,
+ int *num_of_mtts)
{
u64 block_shift = MLX4_MAX_MTT_SHIFT;
u64 min_shift = umem->page_shift;
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1038,6 +1038,8 @@ static int create_qp_common(struct mlx4_
struct mlx4_ib_create_wq wq;
} ucmd;
size_t copy_len;
+ int shift;
+ int n;
copy_len = (src == MLX4_IB_QP_SRC) ?
sizeof(struct mlx4_ib_create_qp) :
@@ -1100,8 +1102,10 @@ static int create_qp_common(struct mlx4_
goto err;
}
- err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
- qp->umem->page_shift, &qp->mtt);
+ n = ib_umem_page_count(qp->umem);
+ shift = mlx4_ib_umem_calc_optimal_mtt_size(qp->umem, 0, &n);
+ err = mlx4_mtt_init(dev->dev, n, shift, &qp->mtt);
+
if (err)
goto err_buf;