diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx5/odp.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/odp.c | 50 |
1 files changed, 23 insertions, 27 deletions
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c index 45ee40c2f36e..f924250f80c2 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -241,18 +241,27 @@ out_unlock: xa_unlock(&imr->implicit_children); } -void mlx5_ib_invalidate_range(struct ib_umem_odp *umem_odp, unsigned long start, - unsigned long end) +static bool mlx5_ib_invalidate_range(struct mmu_interval_notifier *mni, + const struct mmu_notifier_range *range, + unsigned long cur_seq) { + struct ib_umem_odp *umem_odp = + container_of(mni, struct ib_umem_odp, notifier); struct mlx5_ib_mr *mr; const u64 umr_block_mask = (MLX5_UMR_MTT_ALIGNMENT / sizeof(struct mlx5_mtt)) - 1; u64 idx = 0, blk_start_idx = 0; u64 invalidations = 0; + unsigned long start; + unsigned long end; int in_block = 0; u64 addr; + if (!mmu_notifier_range_blockable(range)) + return false; + mutex_lock(&umem_odp->umem_mutex); + mmu_interval_set_seq(mni, cur_seq); /* * If npages is zero then umem_odp->private may not be setup yet. This * does not complete until after the first page is mapped for DMA. @@ -261,8 +270,8 @@ void mlx5_ib_invalidate_range(struct ib_umem_odp *umem_odp, unsigned long start, goto out; mr = umem_odp->private; - start = max_t(u64, ib_umem_start(umem_odp), start); - end = min_t(u64, ib_umem_end(umem_odp), end); + start = max_t(u64, ib_umem_start(umem_odp), range->start); + end = min_t(u64, ib_umem_end(umem_odp), range->end); /* * Iteration one - zap the HW's MTTs. The notifiers_count ensures that @@ -319,8 +328,13 @@ void mlx5_ib_invalidate_range(struct ib_umem_odp *umem_odp, unsigned long start, destroy_unused_implicit_child_mr(mr); out: mutex_unlock(&umem_odp->umem_mutex); + return true; } +const struct mmu_interval_notifier_ops mlx5_mn_ops = { + .invalidate = mlx5_ib_invalidate_range, +}; + void mlx5_ib_internal_fill_odp_caps(struct mlx5_ib_dev *dev) { struct ib_odp_caps *caps = &dev->odp_caps; @@ -419,7 +433,7 @@ static struct mlx5_ib_mr *implicit_get_child_mr(struct mlx5_ib_mr *imr, odp = ib_umem_odp_alloc_child(to_ib_umem_odp(imr->umem), idx * MLX5_IMR_MTT_SIZE, - MLX5_IMR_MTT_SIZE); + MLX5_IMR_MTT_SIZE, &mlx5_mn_ops); if (IS_ERR(odp)) return ERR_CAST(odp); @@ -606,8 +620,9 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp, u64 user_va, size_t bcnt, u32 *bytes_mapped, u32 flags) { - int current_seq, page_shift, ret, np; + int page_shift, ret, np; bool downgrade = flags & MLX5_PF_FLAGS_DOWNGRADE; + unsigned long current_seq; u64 access_mask; u64 start_idx, page_mask; @@ -619,12 +634,7 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp, if (odp->umem.writable && !downgrade) access_mask |= ODP_WRITE_ALLOWED_BIT; - current_seq = READ_ONCE(odp->notifiers_seq); - /* - * Ensure the sequence number is valid for some time before we call - * gup. - */ - smp_rmb(); + current_seq = mmu_interval_read_begin(&odp->notifier); np = ib_umem_odp_map_dma_pages(odp, user_va, bcnt, access_mask, current_seq); @@ -632,7 +642,7 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp, return np; mutex_lock(&odp->umem_mutex); - if (!ib_umem_mmu_notifier_retry(odp, current_seq)) { + if (!mmu_interval_read_retry(&odp->notifier, current_seq)) { /* * No need to check whether the MTTs really belong to * this MR, since ib_umem_odp_map_dma_pages already @@ -662,19 +672,6 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp, return np << (page_shift - PAGE_SHIFT); out: - if (ret == -EAGAIN) { - unsigned long timeout = msecs_to_jiffies(MMU_NOTIFIER_TIMEOUT); - - if (!wait_for_completion_timeout(&odp->notifier_completion, - timeout)) { - mlx5_ib_warn( - mr->dev, - "timeout waiting for mmu notifier. seq %d against %d. notifiers_count=%d\n", - current_seq, odp->notifiers_seq, - odp->notifiers_count); - } - } - return ret; } @@ -1622,7 +1619,6 @@ void mlx5_odp_init_mr_cache_entry(struct mlx5_cache_ent *ent) static const struct ib_device_ops mlx5_ib_dev_odp_ops = { .advise_mr = mlx5_ib_advise_mr, - .invalidate_range = mlx5_ib_invalidate_range, }; int mlx5_ib_odp_init_one(struct mlx5_ib_dev *dev) |