diff options
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 172 | ||||
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mlx5_ib.h | 2 |
2 files changed, 165 insertions, 9 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 1f91d9e543e2..289445f6af21 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -2021,6 +2021,17 @@ static phys_addr_t uar_index2pfn(struct mlx5_ib_dev *dev, return (dev->mdev->bar_addr >> PAGE_SHIFT) + uar_idx / fw_uars_per_page; } +static u64 uar_index2paddress(struct mlx5_ib_dev *dev, + int uar_idx) +{ + unsigned int fw_uars_per_page; + + fw_uars_per_page = MLX5_CAP_GEN(dev->mdev, uar_4k) ? + MLX5_UARS_IN_PAGE : 1; + + return (dev->mdev->bar_addr + (uar_idx / fw_uars_per_page) * PAGE_SIZE); +} + static int get_command(unsigned long offset) { return (offset >> MLX5_IB_MMAP_CMD_SHIFT) & MLX5_IB_MMAP_CMD_MASK; @@ -2105,6 +2116,11 @@ static void mlx5_ib_mmap_free(struct rdma_user_mmap_entry *entry) mutex_unlock(&var_table->bitmap_lock); kfree(mentry); break; + case MLX5_IB_MMAP_TYPE_UAR_WC: + case MLX5_IB_MMAP_TYPE_UAR_NC: + mlx5_cmd_free_uar(dev->mdev, mentry->page_idx); + kfree(mentry); + break; default: WARN_ON(true); } @@ -2256,7 +2272,8 @@ static int mlx5_ib_mmap_offset(struct mlx5_ib_dev *dev, mentry = to_mmmap(entry); pfn = (mentry->address >> PAGE_SHIFT); - if (mentry->mmap_flag == MLX5_IB_MMAP_TYPE_VAR) + if (mentry->mmap_flag == MLX5_IB_MMAP_TYPE_VAR || + mentry->mmap_flag == MLX5_IB_MMAP_TYPE_UAR_NC) prot = pgprot_noncached(vma->vm_page_prot); else prot = pgprot_writecombine(vma->vm_page_prot); @@ -6078,9 +6095,9 @@ static void mlx5_ib_cleanup_multiport_master(struct mlx5_ib_dev *dev) mlx5_nic_vport_disable_roce(dev->mdev); } -static int var_obj_cleanup(struct ib_uobject *uobject, - enum rdma_remove_reason why, - struct uverbs_attr_bundle *attrs) +static int mmap_obj_cleanup(struct ib_uobject *uobject, + enum rdma_remove_reason why, + struct uverbs_attr_bundle *attrs) { struct mlx5_user_mmap_entry *obj = uobject->object; @@ -6088,6 +6105,16 @@ static int var_obj_cleanup(struct ib_uobject *uobject, return 0; } +static int mlx5_rdma_user_mmap_entry_insert(struct mlx5_ib_ucontext *c, + struct mlx5_user_mmap_entry *entry, + size_t length) +{ + return rdma_user_mmap_entry_insert_range( + &c->ibucontext, &entry->rdma_entry, length, + (MLX5_IB_MMAP_OFFSET_START << 16), + ((MLX5_IB_MMAP_OFFSET_END << 16) + (1UL << 16) - 1)); +} + static struct mlx5_user_mmap_entry * alloc_var_entry(struct mlx5_ib_ucontext *c) { @@ -6118,10 +6145,8 @@ alloc_var_entry(struct mlx5_ib_ucontext *c) entry->page_idx = page_idx; entry->mmap_flag = MLX5_IB_MMAP_TYPE_VAR; - err = rdma_user_mmap_entry_insert_range( - &c->ibucontext, &entry->rdma_entry, var_table->stride_size, - MLX5_IB_MMAP_OFFSET_START << 16, - (MLX5_IB_MMAP_OFFSET_END << 16) + (1UL << 16) - 1); + err = mlx5_rdma_user_mmap_entry_insert(c, entry, + var_table->stride_size); if (err) goto err_insert; @@ -6205,7 +6230,7 @@ DECLARE_UVERBS_NAMED_METHOD_DESTROY( UA_MANDATORY)); DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_VAR, - UVERBS_TYPE_ALLOC_IDR(var_obj_cleanup), + UVERBS_TYPE_ALLOC_IDR(mmap_obj_cleanup), &UVERBS_METHOD(MLX5_IB_METHOD_VAR_OBJ_ALLOC), &UVERBS_METHOD(MLX5_IB_METHOD_VAR_OBJ_DESTROY)); @@ -6217,6 +6242,134 @@ static bool var_is_supported(struct ib_device *device) MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q); } +static struct mlx5_user_mmap_entry * +alloc_uar_entry(struct mlx5_ib_ucontext *c, + enum mlx5_ib_uapi_uar_alloc_type alloc_type) +{ + struct mlx5_user_mmap_entry *entry; + struct mlx5_ib_dev *dev; + u32 uar_index; + int err; + + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return ERR_PTR(-ENOMEM); + + dev = to_mdev(c->ibucontext.device); + err = mlx5_cmd_alloc_uar(dev->mdev, &uar_index); + if (err) + goto end; + + entry->page_idx = uar_index; + entry->address = uar_index2paddress(dev, uar_index); + if (alloc_type == MLX5_IB_UAPI_UAR_ALLOC_TYPE_BF) + entry->mmap_flag = MLX5_IB_MMAP_TYPE_UAR_WC; + else + entry->mmap_flag = MLX5_IB_MMAP_TYPE_UAR_NC; + + err = mlx5_rdma_user_mmap_entry_insert(c, entry, PAGE_SIZE); + if (err) + goto err_insert; + + return entry; + +err_insert: + mlx5_cmd_free_uar(dev->mdev, uar_index); +end: + kfree(entry); + return ERR_PTR(err); +} + +static int UVERBS_HANDLER(MLX5_IB_METHOD_UAR_OBJ_ALLOC)( + struct uverbs_attr_bundle *attrs) +{ + struct ib_uobject *uobj = uverbs_attr_get_uobject( + attrs, MLX5_IB_ATTR_UAR_OBJ_ALLOC_HANDLE); + enum mlx5_ib_uapi_uar_alloc_type alloc_type; + struct mlx5_ib_ucontext *c; + struct mlx5_user_mmap_entry *entry; + u64 mmap_offset; + u32 length; + int err; + + c = to_mucontext(ib_uverbs_get_ucontext(attrs)); + if (IS_ERR(c)) + return PTR_ERR(c); + + err = uverbs_get_const(&alloc_type, attrs, + MLX5_IB_ATTR_UAR_OBJ_ALLOC_TYPE); + if (err) + return err; + + if (alloc_type != MLX5_IB_UAPI_UAR_ALLOC_TYPE_BF && + alloc_type != MLX5_IB_UAPI_UAR_ALLOC_TYPE_NC) + return -EOPNOTSUPP; + + if (!to_mdev(c->ibucontext.device)->wc_support && + alloc_type == MLX5_IB_UAPI_UAR_ALLOC_TYPE_BF) + return -EOPNOTSUPP; + + entry = alloc_uar_entry(c, alloc_type); + if (IS_ERR(entry)) + return PTR_ERR(entry); + + mmap_offset = mlx5_entry_to_mmap_offset(entry); + length = entry->rdma_entry.npages * PAGE_SIZE; + uobj->object = entry; + + err = uverbs_copy_to(attrs, MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_OFFSET, + &mmap_offset, sizeof(mmap_offset)); + if (err) + goto err; + + err = uverbs_copy_to(attrs, MLX5_IB_ATTR_UAR_OBJ_ALLOC_PAGE_ID, + &entry->page_idx, sizeof(entry->page_idx)); + if (err) + goto err; + + err = uverbs_copy_to(attrs, MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_LENGTH, + &length, sizeof(length)); + if (err) + goto err; + + return 0; + +err: + rdma_user_mmap_entry_remove(&entry->rdma_entry); + return err; +} + +DECLARE_UVERBS_NAMED_METHOD( + MLX5_IB_METHOD_UAR_OBJ_ALLOC, + UVERBS_ATTR_IDR(MLX5_IB_ATTR_UAR_OBJ_ALLOC_HANDLE, + MLX5_IB_OBJECT_UAR, + UVERBS_ACCESS_NEW, + UA_MANDATORY), + UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_UAR_OBJ_ALLOC_TYPE, + enum mlx5_ib_uapi_uar_alloc_type, + UA_MANDATORY), + UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_UAR_OBJ_ALLOC_PAGE_ID, + UVERBS_ATTR_TYPE(u32), + UA_MANDATORY), + UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_LENGTH, + UVERBS_ATTR_TYPE(u32), + UA_MANDATORY), + UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_OFFSET, + UVERBS_ATTR_TYPE(u64), + UA_MANDATORY)); + +DECLARE_UVERBS_NAMED_METHOD_DESTROY( + MLX5_IB_METHOD_UAR_OBJ_DESTROY, + UVERBS_ATTR_IDR(MLX5_IB_ATTR_UAR_OBJ_DESTROY_HANDLE, + MLX5_IB_OBJECT_UAR, + UVERBS_ACCESS_DESTROY, + UA_MANDATORY)); + +DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_UAR, + UVERBS_TYPE_ALLOC_IDR(mmap_obj_cleanup), + &UVERBS_METHOD(MLX5_IB_METHOD_UAR_OBJ_ALLOC), + &UVERBS_METHOD(MLX5_IB_METHOD_UAR_OBJ_DESTROY)); + ADD_UVERBS_ATTRIBUTES_SIMPLE( mlx5_ib_dm, UVERBS_OBJECT_DM, @@ -6248,6 +6401,7 @@ static const struct uapi_definition mlx5_ib_defs[] = { UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_DM, &mlx5_ib_dm), UAPI_DEF_CHAIN_OBJ_TREE_NAMED(MLX5_IB_OBJECT_VAR, UAPI_DEF_IS_OBJ_SUPPORTED(var_is_supported)), + UAPI_DEF_CHAIN_OBJ_TREE_NAMED(MLX5_IB_OBJECT_UAR), {} }; diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 2be773a24dda..3ba6175f949e 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -124,6 +124,8 @@ enum { enum mlx5_ib_mmap_type { MLX5_IB_MMAP_TYPE_MEMIC = 1, MLX5_IB_MMAP_TYPE_VAR = 2, + MLX5_IB_MMAP_TYPE_UAR_WC = 3, + MLX5_IB_MMAP_TYPE_UAR_NC = 4, }; struct mlx5_ib_ucontext { |