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IB/mlx5: Fix MR registration flow to use UMR properly

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[ Upstream commit e5366d309a ]

Driver shouldn't allow to use UMR to register a MR when
umr_modify_atomic_disabled is set. Otherwise it will always end up with a
failure in the post send flow which sets the UMR WQE to modify atomic access
right.

Fixes: c8d75a980f ("IB/mlx5: Respect new UMR capabilities")
Signed-off-by: Guy Levi <guyle@mellanox.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190731081929.32559-1-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Guy Levi 2019-07-31 11:19:29 +03:00 committed by Greg Kroah-Hartman
parent efb742ce4e
commit a0258ff499
1 changed files with 9 additions and 18 deletions
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27
drivers/infiniband/hw/mlx5/mr.c
View file

@ -51,22 +51,12 @@ static void clean_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr);
static void dereg_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr);
static int mr_cache_max_order(struct mlx5_ib_dev *dev);
static int unreg_umr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr);
static bool umr_can_modify_entity_size(struct mlx5_ib_dev *dev)
{
return !MLX5_CAP_GEN(dev->mdev, umr_modify_entity_size_disabled);
}
static bool umr_can_use_indirect_mkey(struct mlx5_ib_dev *dev)
{
return !MLX5_CAP_GEN(dev->mdev, umr_indirect_mkey_disabled);
}
static bool use_umr(struct mlx5_ib_dev *dev, int order)
{
return order <= mr_cache_max_order(dev) &&
umr_can_modify_entity_size(dev);
}
static int destroy_mkey(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
{
int err = mlx5_core_destroy_mkey(dev->mdev, &mr->mmkey);
@ -1305,7 +1295,7 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct mlx5_ib_mr *mr = NULL;
bool populate_mtts = false;
bool use_umr;
struct ib_umem *umem;
int page_shift;
int npages;
@ -1338,29 +1328,30 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
if (err < 0)
return ERR_PTR(err);
if (use_umr(dev, order)) {
use_umr = !MLX5_CAP_GEN(dev->mdev, umr_modify_entity_size_disabled) &&
(!MLX5_CAP_GEN(dev->mdev, umr_modify_atomic_disabled) ||
!MLX5_CAP_GEN(dev->mdev, atomic));
if (order <= mr_cache_max_order(dev) && use_umr) {
mr = alloc_mr_from_cache(pd, umem, virt_addr, length, ncont,
page_shift, order, access_flags);
if (PTR_ERR(mr) == -EAGAIN) {
mlx5_ib_dbg(dev, "cache empty for order %d\n", order);
mr = NULL;
}
populate_mtts = false;
} else if (!MLX5_CAP_GEN(dev->mdev, umr_extended_translation_offset)) {
if (access_flags & IB_ACCESS_ON_DEMAND) {
err = -EINVAL;
pr_err("Got MR registration for ODP MR > 512MB, not supported for Connect-IB\n");
goto error;
}
populate_mtts = true;
use_umr = false;
}
if (!mr) {
if (!umr_can_modify_entity_size(dev))
populate_mtts = true;
mutex_lock(&dev->slow_path_mutex);
mr = reg_create(NULL, pd, virt_addr, length, umem, ncont,
page_shift, access_flags, populate_mtts);
page_shift, access_flags, !use_umr);
mutex_unlock(&dev->slow_path_mutex);
}
@ -1378,7 +1369,7 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
update_odp_mr(mr);
#endif
if (!populate_mtts) {
if (use_umr) {
int update_xlt_flags = MLX5_IB_UPD_XLT_ENABLE;
if (access_flags & IB_ACCESS_ON_DEMAND)