diff options
| author | Artemy Kovalyov | 2017-04-05 08:23:57 +0200 |
|---|---|---|
| committer | Doug Ledford | 2017-04-25 21:40:28 +0200 |
| commit | 0008b84ea9afe6ec255c09044e8090cb76babc80 (patch) | |
| tree | 15028043fcea6ff1aed3a90e342ef89f6a61cf45 /drivers/infiniband/core/umem_odp.c | |
| parent | IB/mlx5: Add contiguous ODP support (diff) | |
| download | kernel-qcow2-linux-0008b84ea9afe6ec255c09044e8090cb76babc80.tar.gz kernel-qcow2-linux-0008b84ea9afe6ec255c09044e8090cb76babc80.tar.xz kernel-qcow2-linux-0008b84ea9afe6ec255c09044e8090cb76babc80.zip | |
IB/umem: Add support to huge ODP
Add IB_ACCESS_HUGETLB ib_reg_mr flag.
Hugetlb region registered with this flag
will use single translation entry per huge page.
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core/umem_odp.c')
| -rw-r--r-- | drivers/infiniband/core/umem_odp.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c index 73053c8a9e3b..0780b1afefa9 100644 --- a/drivers/infiniband/core/umem_odp.c +++ b/drivers/infiniband/core/umem_odp.c @@ -38,6 +38,7 @@ #include <linux/slab.h> #include <linux/export.h> #include <linux/vmalloc.h> +#include <linux/hugetlb.h> #include <rdma/ib_verbs.h> #include <rdma/ib_umem.h> @@ -306,7 +307,8 @@ out_umem: } EXPORT_SYMBOL(ib_alloc_odp_umem); -int ib_umem_odp_get(struct ib_ucontext *context, struct ib_umem *umem) +int ib_umem_odp_get(struct ib_ucontext *context, struct ib_umem *umem, + int access) { int ret_val; struct pid *our_pid; @@ -315,6 +317,20 @@ int ib_umem_odp_get(struct ib_ucontext *context, struct ib_umem *umem) if (!mm) return -EINVAL; + if (access & IB_ACCESS_HUGETLB) { + struct vm_area_struct *vma; + struct hstate *h; + + vma = find_vma(mm, ib_umem_start(umem)); + if (!vma || !is_vm_hugetlb_page(vma)) + return -EINVAL; + h = hstate_vma(vma); + umem->page_shift = huge_page_shift(h); + umem->hugetlb = 1; + } else { + umem->hugetlb = 0; + } + /* Prevent creating ODP MRs in child processes */ rcu_read_lock(); our_pid = get_task_pid(current->group_leader, PIDTYPE_PID); @@ -325,7 +341,6 @@ int ib_umem_odp_get(struct ib_ucontext *context, struct ib_umem *umem) goto out_mm; } - umem->hugetlb = 0; umem->odp_data = kzalloc(sizeof(*umem->odp_data), GFP_KERNEL); if (!umem->odp_data) { ret_val = -ENOMEM; |