diff options
-rw-r--r-- | drivers/infiniband/hw/mlx5/devx.c | 8 | ||||
-rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 17 | ||||
-rw-r--r-- | drivers/infiniband/hw/mlx5/mlx5_ib.h | 5 | ||||
-rw-r--r-- | drivers/infiniband/hw/mlx5/mr.c | 43 | ||||
-rw-r--r-- | drivers/infiniband/hw/mlx5/odp.c | 83 |
5 files changed, 83 insertions, 73 deletions
diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c index d609f4659afb..6b1fca91d7d3 100644 --- a/drivers/infiniband/hw/mlx5/devx.c +++ b/drivers/infiniband/hw/mlx5/devx.c @@ -1265,8 +1265,8 @@ static int devx_handle_mkey_indirect(struct devx_obj *obj, mkey->pd = MLX5_GET(mkc, mkc, pd); devx_mr->ndescs = MLX5_GET(mkc, mkc, translations_octword_size); - return xa_err(xa_store(&dev->mdev->priv.mkey_table, - mlx5_base_mkey(mkey->key), mkey, GFP_KERNEL)); + return xa_err(xa_store(&dev->odp_mkeys, mlx5_base_mkey(mkey->key), mkey, + GFP_KERNEL)); } static int devx_handle_mkey_create(struct mlx5_ib_dev *dev, @@ -1345,9 +1345,9 @@ static int devx_obj_cleanup(struct ib_uobject *uobject, * the mmkey, we must wait for that to stop before freeing the * mkey, as another allocation could get the same mkey #. */ - xa_erase(&obj->ib_dev->mdev->priv.mkey_table, + xa_erase(&obj->ib_dev->odp_mkeys, mlx5_base_mkey(obj->devx_mr.mmkey.key)); - synchronize_srcu(&dev->mr_srcu); + synchronize_srcu(&dev->odp_srcu); } if (obj->flags & DEVX_OBJ_FLAGS_DCT) diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index b7eea724beaa..4692c37b057c 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -6145,10 +6145,10 @@ static struct ib_counters *mlx5_ib_create_counters(struct ib_device *device, static void mlx5_ib_stage_init_cleanup(struct mlx5_ib_dev *dev) { mlx5_ib_cleanup_multiport_master(dev); - if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) { - srcu_barrier(&dev->mr_srcu); - cleanup_srcu_struct(&dev->mr_srcu); - } + WARN_ON(!xa_empty(&dev->odp_mkeys)); + if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) + srcu_barrier(&dev->odp_srcu); + cleanup_srcu_struct(&dev->odp_srcu); WARN_ON(!xa_empty(&dev->sig_mrs)); WARN_ON(!bitmap_empty(dev->dm.memic_alloc_pages, MLX5_MAX_MEMIC_PAGES)); @@ -6202,16 +6202,15 @@ static int mlx5_ib_stage_init_init(struct mlx5_ib_dev *dev) mutex_init(&dev->cap_mask_mutex); INIT_LIST_HEAD(&dev->qp_list); spin_lock_init(&dev->reset_flow_resource_lock); + xa_init(&dev->odp_mkeys); xa_init(&dev->sig_mrs); spin_lock_init(&dev->dm.lock); dev->dm.dev = mdev; - if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) { - err = init_srcu_struct(&dev->mr_srcu); - if (err) - goto err_mp; - } + err = init_srcu_struct(&dev->odp_srcu); + if (err) + goto err_mp; return 0; diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index f4ce58354544..2cf91db6a36f 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -606,7 +606,6 @@ struct mlx5_ib_mr { struct mlx5_ib_dev *dev; u32 out[MLX5_ST_SZ_DW(create_mkey_out)]; struct mlx5_core_sig_ctx *sig; - unsigned int live; void *descs_alloc; int access_flags; /* Needed for rereg MR */ @@ -975,7 +974,9 @@ struct mlx5_ib_dev { * Sleepable RCU that prevents destruction of MRs while they are still * being used by a page fault handler. */ - struct srcu_struct mr_srcu; + struct srcu_struct odp_srcu; + struct xarray odp_mkeys; + u32 null_mkey; struct mlx5_ib_flow_db *flow_db; /* protect resources needed as part of reset flow */ diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index fd24640606c1..60b12dc53004 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -59,13 +59,9 @@ static bool umr_can_use_indirect_mkey(struct mlx5_ib_dev *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); + WARN_ON(xa_load(&dev->odp_mkeys, mlx5_base_mkey(mr->mmkey.key))); - if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) - /* Wait until all page fault handlers using the mr complete. */ - synchronize_srcu(&dev->mr_srcu); - - return err; + return mlx5_core_destroy_mkey(dev->mdev, &mr->mmkey); } static int order2idx(struct mlx5_ib_dev *dev, int order) @@ -218,9 +214,6 @@ static void remove_keys(struct mlx5_ib_dev *dev, int c, int num) mlx5_core_destroy_mkey(dev->mdev, &mr->mmkey); } - if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) - synchronize_srcu(&dev->mr_srcu); - list_for_each_entry_safe(mr, tmp_mr, &del_list, list) { list_del(&mr->list); kfree(mr); @@ -555,10 +548,6 @@ static void clean_keys(struct mlx5_ib_dev *dev, int c) mlx5_core_destroy_mkey(dev->mdev, &mr->mmkey); } -#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING - synchronize_srcu(&dev->mr_srcu); -#endif - list_for_each_entry_safe(mr, tmp_mr, &del_list, list) { list_del(&mr->list); kfree(mr); @@ -1338,9 +1327,14 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, if (is_odp_mr(mr)) { to_ib_umem_odp(mr->umem)->private = mr; atomic_set(&mr->num_pending_prefetch, 0); + err = xa_err(xa_store(&dev->odp_mkeys, + mlx5_base_mkey(mr->mmkey.key), &mr->mmkey, + GFP_KERNEL)); + if (err) { + dereg_mr(dev, mr); + return ERR_PTR(err); + } } - if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) - smp_store_release(&mr->live, 1); return &mr->ibmr; error: @@ -1582,10 +1576,10 @@ static void dereg_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr) /* Prevent new page faults and * prefetch requests from succeeding */ - WRITE_ONCE(mr->live, 0); + xa_erase(&dev->odp_mkeys, mlx5_base_mkey(mr->mmkey.key)); /* Wait for all running page-fault handlers to finish. */ - synchronize_srcu(&dev->mr_srcu); + synchronize_srcu(&dev->odp_srcu); /* dequeue pending prefetch requests for the mr */ if (atomic_read(&mr->num_pending_prefetch)) @@ -1959,9 +1953,19 @@ struct ib_mw *mlx5_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type, } } + if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) { + err = xa_err(xa_store(&dev->odp_mkeys, + mlx5_base_mkey(mw->mmkey.key), &mw->mmkey, + GFP_KERNEL)); + if (err) + goto free_mkey; + } + kfree(in); return &mw->ibmw; +free_mkey: + mlx5_core_destroy_mkey(dev->mdev, &mw->mmkey); free: kfree(mw); kfree(in); @@ -1975,13 +1979,12 @@ int mlx5_ib_dealloc_mw(struct ib_mw *mw) int err; if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) { - xa_erase(&dev->mdev->priv.mkey_table, - mlx5_base_mkey(mmw->mmkey.key)); + xa_erase(&dev->odp_mkeys, mlx5_base_mkey(mmw->mmkey.key)); /* * pagefault_single_data_segment() may be accessing mmw under * SRCU if the user bound an ODP MR to this MW. */ - synchronize_srcu(&dev->mr_srcu); + synchronize_srcu(&dev->odp_srcu); } err = mlx5_core_destroy_mkey(dev->mdev, &mmw->mmkey); diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c index 09dac97e4ca4..1f06433bcfc8 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -199,7 +199,7 @@ void mlx5_odp_populate_klm(struct mlx5_klm *pklm, size_t offset, * locking around the children list. */ lockdep_assert_held(&to_ib_umem_odp(mr->umem)->umem_mutex); - lockdep_assert_held(&mr->dev->mr_srcu); + lockdep_assert_held(&mr->dev->odp_srcu); odp = odp_lookup(offset * MLX5_IMR_MTT_SIZE, nentries * MLX5_IMR_MTT_SIZE, mr); @@ -229,16 +229,16 @@ static void mr_leaf_free_action(struct work_struct *work) int srcu_key; mr->parent = NULL; - synchronize_srcu(&mr->dev->mr_srcu); + synchronize_srcu(&mr->dev->odp_srcu); - if (smp_load_acquire(&imr->live)) { - srcu_key = srcu_read_lock(&mr->dev->mr_srcu); + if (xa_load(&mr->dev->odp_mkeys, mlx5_base_mkey(imr->mmkey.key))) { + srcu_key = srcu_read_lock(&mr->dev->odp_srcu); mutex_lock(&odp_imr->umem_mutex); mlx5_ib_update_xlt(imr, idx, 1, 0, MLX5_IB_UPD_XLT_INDIRECT | MLX5_IB_UPD_XLT_ATOMIC); mutex_unlock(&odp_imr->umem_mutex); - srcu_read_unlock(&mr->dev->mr_srcu, srcu_key); + srcu_read_unlock(&mr->dev->odp_srcu, srcu_key); } ib_umem_odp_release(odp); mlx5_mr_cache_free(mr->dev, mr); @@ -318,7 +318,7 @@ void mlx5_ib_invalidate_range(struct ib_umem_odp *umem_odp, unsigned long start, if (unlikely(!umem_odp->npages && mr->parent && !umem_odp->dying)) { - WRITE_ONCE(mr->live, 0); + xa_erase(&mr->dev->odp_mkeys, mlx5_base_mkey(mr->mmkey.key)); umem_odp->dying = 1; atomic_inc(&mr->parent->num_leaf_free); schedule_work(&umem_odp->work); @@ -430,6 +430,11 @@ static struct mlx5_ib_mr *implicit_mr_alloc(struct ib_pd *pd, if (IS_ERR(mr)) return mr; + err = xa_reserve(&dev->odp_mkeys, mlx5_base_mkey(mr->mmkey.key), + GFP_KERNEL); + if (err) + goto out_mr; + mr->ibmr.pd = pd; mr->dev = dev; @@ -455,7 +460,7 @@ static struct mlx5_ib_mr *implicit_mr_alloc(struct ib_pd *pd, } if (err) - goto fail; + goto out_release; mr->ibmr.lkey = mr->mmkey.key; mr->ibmr.rkey = mr->mmkey.key; @@ -465,7 +470,9 @@ static struct mlx5_ib_mr *implicit_mr_alloc(struct ib_pd *pd, return mr; -fail: +out_release: + xa_release(&dev->odp_mkeys, mlx5_base_mkey(mr->mmkey.key)); +out_mr: mlx5_ib_err(dev, "Failed to register MKEY %d\n", err); mlx5_mr_cache_free(dev, mr); @@ -513,7 +520,8 @@ next_mr: mtt->parent = mr; INIT_WORK(&odp->work, mr_leaf_free_action); - smp_store_release(&mtt->live, 1); + xa_store(&dev->odp_mkeys, mlx5_base_mkey(mtt->mmkey.key), + &mtt->mmkey, GFP_ATOMIC); if (!nentries) start_idx = addr >> MLX5_IMR_MTT_SHIFT; @@ -567,7 +575,8 @@ struct mlx5_ib_mr *mlx5_ib_alloc_implicit_mr(struct mlx5_ib_pd *pd, init_waitqueue_head(&imr->q_leaf_free); atomic_set(&imr->num_leaf_free, 0); atomic_set(&imr->num_pending_prefetch, 0); - smp_store_release(&imr->live, 1); + xa_store(&imr->dev->odp_mkeys, mlx5_base_mkey(imr->mmkey.key), + &imr->mmkey, GFP_ATOMIC); return imr; } @@ -778,13 +787,28 @@ static int pagefault_single_data_segment(struct mlx5_ib_dev *dev, size_t offset; int ndescs; - srcu_key = srcu_read_lock(&dev->mr_srcu); + srcu_key = srcu_read_lock(&dev->odp_srcu); io_virt += *bytes_committed; bcnt -= *bytes_committed; next_mr: - mmkey = xa_load(&dev->mdev->priv.mkey_table, mlx5_base_mkey(key)); + mmkey = xa_load(&dev->odp_mkeys, mlx5_base_mkey(key)); + if (!mmkey) { + mlx5_ib_dbg( + dev, + "skipping non ODP MR (lkey=0x%06x) in page fault handler.\n", + key); + if (bytes_mapped) + *bytes_mapped += bcnt; + /* + * The user could specify a SGL with multiple lkeys and only + * some of them are ODP. Treat the non-ODP ones as fully + * faulted. + */ + ret = 0; + goto srcu_unlock; + } if (!mkey_is_eq(mmkey, key)) { mlx5_ib_dbg(dev, "failed to find mkey %x\n", key); ret = -EFAULT; @@ -794,20 +818,6 @@ next_mr: switch (mmkey->type) { case MLX5_MKEY_MR: mr = container_of(mmkey, struct mlx5_ib_mr, mmkey); - if (!smp_load_acquire(&mr->live) || !mr->ibmr.pd) { - mlx5_ib_dbg(dev, "got dead MR\n"); - ret = -EFAULT; - goto srcu_unlock; - } - - if (!is_odp_mr(mr)) { - mlx5_ib_dbg(dev, "skipping non ODP MR (lkey=0x%06x) in page fault handler.\n", - key); - if (bytes_mapped) - *bytes_mapped += bcnt; - ret = 0; - goto srcu_unlock; - } ret = pagefault_mr(mr, io_virt, bcnt, bytes_mapped, 0); if (ret < 0) @@ -902,7 +912,7 @@ srcu_unlock: } kfree(out); - srcu_read_unlock(&dev->mr_srcu, srcu_key); + srcu_read_unlock(&dev->odp_srcu, srcu_key); *bytes_committed = 0; return ret ? ret : npages; } @@ -1623,18 +1633,15 @@ get_prefetchable_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice, struct ib_umem_odp *odp; struct mlx5_ib_mr *mr; - lockdep_assert_held(&dev->mr_srcu); + lockdep_assert_held(&dev->odp_srcu); - mmkey = xa_load(&dev->mdev->priv.mkey_table, mlx5_base_mkey(lkey)); + mmkey = xa_load(&dev->odp_mkeys, mlx5_base_mkey(lkey)); if (!mmkey || mmkey->key != lkey || mmkey->type != MLX5_MKEY_MR) return NULL; mr = container_of(mmkey, struct mlx5_ib_mr, mmkey); - if (!smp_load_acquire(&mr->live)) - return NULL; - - if (mr->ibmr.pd != pd || !is_odp_mr(mr)) + if (mr->ibmr.pd != pd) return NULL; /* @@ -1709,7 +1716,7 @@ static int mlx5_ib_prefetch_sg_list(struct ib_pd *pd, int ret = 0; u32 i; - srcu_key = srcu_read_lock(&dev->mr_srcu); + srcu_key = srcu_read_lock(&dev->odp_srcu); for (i = 0; i < num_sge; ++i) { struct mlx5_ib_mr *mr; @@ -1726,7 +1733,7 @@ static int mlx5_ib_prefetch_sg_list(struct ib_pd *pd, ret = 0; out: - srcu_read_unlock(&dev->mr_srcu, srcu_key); + srcu_read_unlock(&dev->odp_srcu, srcu_key); return ret; } @@ -1750,12 +1757,12 @@ int mlx5_ib_advise_mr_prefetch(struct ib_pd *pd, if (!work) return -ENOMEM; - srcu_key = srcu_read_lock(&dev->mr_srcu); + srcu_key = srcu_read_lock(&dev->odp_srcu); if (!init_prefetch_work(pd, advice, pf_flags, work, sg_list, num_sge)) { - srcu_read_unlock(&dev->mr_srcu, srcu_key); + srcu_read_unlock(&dev->odp_srcu, srcu_key); return -EINVAL; } queue_work(system_unbound_wq, &work->work); - srcu_read_unlock(&dev->mr_srcu, srcu_key); + srcu_read_unlock(&dev->odp_srcu, srcu_key); return 0; } |