diff options
| author | Majd Dibbiny <majd@mellanox.com> | 2016-10-27 15:36:47 +0200 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-11-17 02:04:48 +0100 |
| commit | 762f899ae7875554284af92b821be8c083227092 (patch) | |
| tree | a83f654fb5918a0301ac51b4664e26de72ef47b7 /drivers/infiniband/hw/mlx5/mem.c | |
| parent | IB/mlx5: Fix reported max SGE calculation (diff) | |
| download | linux-762f899ae7875554284af92b821be8c083227092.tar.xz linux-762f899ae7875554284af92b821be8c083227092.zip | |
IB/mlx5: Limit mkey page size to 2GB
The maximum page size in the mkey context is 2GB.
Until today, we didn't enforce this requirement in the code,
and therefore, if we got a page size larger than 2GB, we
have passed zeros in the log_page_shift instead of the actual value
and the registration failed.
This patch limits the driver to use compound pages of 2GB for mkeys.
Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/mem.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mem.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/mem.c b/drivers/infiniband/hw/mlx5/mem.c index 996b54e366b0..6851357c16f4 100644 --- a/drivers/infiniband/hw/mlx5/mem.c +++ b/drivers/infiniband/hw/mlx5/mem.c @@ -37,12 +37,15 @@ /* @umem: umem object to scan * @addr: ib virtual address requested by the user + * @max_page_shift: high limit for page_shift - 0 means no limit * @count: number of PAGE_SIZE pages covered by umem * @shift: page shift for the compound pages found in the region * @ncont: number of compund pages * @order: log2 of the number of compound pages */ -void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift, +void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, + unsigned long max_page_shift, + int *count, int *shift, int *ncont, int *order) { unsigned long tmp; @@ -72,6 +75,8 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift, addr = addr >> page_shift; tmp = (unsigned long)addr; m = find_first_bit(&tmp, BITS_PER_LONG); + if (max_page_shift) + m = min_t(unsigned long, max_page_shift - page_shift, m); skip = 1 << m; mask = skip - 1; i = 0; |