From patchwork Wed Sep 23 16:50:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 11795277 X-Patchwork-Delegate: jgg@ziepe.ca Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8D88492C for ; Wed, 23 Sep 2020 16:50:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6FD7920672 for ; Wed, 23 Sep 2020 16:50:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600879834; bh=mbJXxfC0zE1GuBCa15LJjPUxfu9pZ9nsdOXpXzG3/p0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=bTEr9zd2OOu+SS6LX9NEtH+vaOtdd8bEBNlxFnGUU+3h/EI0JbW6/sUVkxjqcIHCB v30im8gE03u/jWDrStDmX/LPOf4XU+kgrhqNmiGTo9iCkDK09Ksg3cUjr+0xHZUpQb wgWB8fawiqxI2sBmJ2azjP/u3VX003BJHOJKQ3iY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726476AbgIWQue (ORCPT ); Wed, 23 Sep 2020 12:50:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:58650 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726381AbgIWQud (ORCPT ); Wed, 23 Sep 2020 12:50:33 -0400 Received: from localhost (unknown [213.57.247.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7C27C20672; Wed, 23 Sep 2020 16:50:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600879832; bh=mbJXxfC0zE1GuBCa15LJjPUxfu9pZ9nsdOXpXzG3/p0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vaZlHvsbtH6Eix+++NCy2Trx2LdlGCNowput6JVG5j5Yu3zc1IL3aEoBPJ7mvkRVL 6WGWBsfTg+76p7KGvQHA6LkRk2RtHNjYD28ihmWlxriwNoOZrOeqq7wYc4yg9ELYQ6 HLB3wo6xLxeo6CBU1ji3lVs/AnHR1168UiVhVg/8= From: Leon Romanovsky To: Doug Ledford , Jason Gunthorpe Cc: Avihai Horon , linux-rdma@vger.kernel.org Subject: [PATCH rdma-next v3 4/4] RDMA/uverbs: Expose the new GID query API to user space Date: Wed, 23 Sep 2020 19:50:15 +0300 Message-Id: <20200923165015.2491894-5-leon@kernel.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200923165015.2491894-1-leon@kernel.org> References: <20200923165015.2491894-1-leon@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Avihai Horon Expose the query GID table and entry API to user space by adding two new methods and method handlers to the device object. This API provides a faster way to query a GID table using single call and will be used in libibverbs to improve current approach that requires multiple calls to open, close and read multiple sysfs files for a single GID table entry. Signed-off-by: Avihai Horon Signed-off-by: Leon Romanovsky --- .../infiniband/core/uverbs_std_types_device.c | 196 +++++++++++++++++- include/rdma/ib_verbs.h | 6 +- include/uapi/rdma/ib_user_ioctl_cmds.h | 16 ++ include/uapi/rdma/ib_user_ioctl_verbs.h | 6 + 4 files changed, 220 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/core/uverbs_std_types_device.c b/drivers/infiniband/core/uverbs_std_types_device.c index 9f43c0161a8e..f367d523a46b 100644 --- a/drivers/infiniband/core/uverbs_std_types_device.c +++ b/drivers/infiniband/core/uverbs_std_types_device.c @@ -3,11 +3,13 @@ * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved. */ +#include #include #include "rdma_core.h" #include "uverbs.h" #include #include +#include /* * This ioctl method allows calling any defined write or write_ex @@ -266,6 +268,172 @@ static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_CONTEXT)( return ucontext->device->ops.query_ucontext(ucontext, attrs); } +static int copy_gid_entries_to_user(struct uverbs_attr_bundle *attrs, + struct ib_uverbs_gid_entry *entries, + size_t num_entries, size_t user_entry_size) +{ + const struct uverbs_attr *attr; + void __user *user_entries; + size_t copy_len; + int ret; + int i; + + if (user_entry_size == sizeof(*entries)) { + ret = uverbs_copy_to(attrs, + UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES, + entries, sizeof(*entries) * num_entries); + return ret; + } + + copy_len = min_t(size_t, user_entry_size, sizeof(*entries)); + attr = uverbs_attr_get(attrs, UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES); + if (IS_ERR(attr)) + return PTR_ERR(attr); + + user_entries = u64_to_user_ptr(attr->ptr_attr.data); + for (i = 0; i < num_entries; i++) { + if (copy_to_user(user_entries, entries, copy_len)) + return -EFAULT; + + if (user_entry_size > sizeof(*entries)) { + if (clear_user(user_entries + sizeof(*entries), + user_entry_size - sizeof(*entries))) + return -EFAULT; + } + + entries++; + user_entries += user_entry_size; + } + + return uverbs_output_written(attrs, + UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES); +} + +static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_GID_TABLE)( + struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_gid_entry *entries; + struct ib_ucontext *ucontext; + struct ib_device *ib_dev; + size_t user_entry_size; + ssize_t num_entries; + size_t max_entries; + size_t num_bytes; + u32 flags; + int ret; + + ret = uverbs_get_flags32(&flags, attrs, + UVERBS_ATTR_QUERY_GID_TABLE_FLAGS, 0); + if (ret) + return ret; + + ret = uverbs_get_const(&user_entry_size, attrs, + UVERBS_ATTR_QUERY_GID_TABLE_ENTRY_SIZE); + if (ret) + return ret; + + max_entries = uverbs_attr_ptr_get_array_size( + attrs, UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES, + user_entry_size); + if (max_entries <= 0) + return -EINVAL; + + ucontext = ib_uverbs_get_ucontext(attrs); + if (IS_ERR(ucontext)) + return PTR_ERR(ucontext); + ib_dev = ucontext->device; + + if (check_mul_overflow(max_entries, sizeof(*entries), &num_bytes)) + return -EINVAL; + + entries = uverbs_zalloc(attrs, num_bytes); + if (!entries) + return -ENOMEM; + + num_entries = rdma_query_gid_table(ib_dev, entries, max_entries); + if (num_entries < 0) + return -EINVAL; + + ret = copy_gid_entries_to_user(attrs, entries, num_entries, + user_entry_size); + if (ret) + return ret; + + ret = uverbs_copy_to(attrs, + UVERBS_ATTR_QUERY_GID_TABLE_RESP_NUM_ENTRIES, + &num_entries, sizeof(num_entries)); + return ret; +} + +static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_GID_ENTRY)( + struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_gid_entry entry = {}; + const struct ib_gid_attr *gid_attr; + struct ib_ucontext *ucontext; + struct ib_device *ib_dev; + struct net_device *ndev; + u32 gid_index; + u32 port_num; + u32 flags; + int ret; + + ret = uverbs_get_flags32(&flags, attrs, + UVERBS_ATTR_QUERY_GID_ENTRY_FLAGS, 0); + if (ret) + return ret; + + ret = uverbs_get_const(&port_num, attrs, + UVERBS_ATTR_QUERY_GID_ENTRY_PORT); + if (ret) + return ret; + + ret = uverbs_get_const(&gid_index, attrs, + UVERBS_ATTR_QUERY_GID_ENTRY_GID_INDEX); + if (ret) + return ret; + + ucontext = ib_uverbs_get_ucontext(attrs); + if (IS_ERR(ucontext)) + return PTR_ERR(ucontext); + ib_dev = ucontext->device; + + if (!rdma_is_port_valid(ib_dev, port_num)) + return -EINVAL; + + if (!rdma_ib_or_roce(ib_dev, port_num)) + return -EOPNOTSUPP; + + gid_attr = rdma_get_gid_attr(ib_dev, port_num, gid_index); + if (IS_ERR(gid_attr)) + return PTR_ERR(gid_attr); + + memcpy(&entry.gid, &gid_attr->gid, sizeof(gid_attr->gid)); + entry.gid_index = gid_attr->index; + entry.port_num = gid_attr->port_num; + entry.gid_type = gid_attr->gid_type; + + rcu_read_lock(); + ndev = rdma_read_gid_attr_ndev_rcu(gid_attr); + if (IS_ERR(ndev)) { + if (PTR_ERR(ndev) != -ENODEV) { + ret = PTR_ERR(ndev); + rcu_read_unlock(); + goto out; + } + } else { + entry.netdev_ifindex = ndev->ifindex; + } + rcu_read_unlock(); + + ret = uverbs_copy_to_struct_or_zero( + attrs, UVERBS_ATTR_QUERY_GID_ENTRY_RESP_ENTRY, &entry, + sizeof(entry)); +out: + rdma_put_gid_attr(gid_attr); + return ret; +} + DECLARE_UVERBS_NAMED_METHOD( UVERBS_METHOD_GET_CONTEXT, UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS, @@ -300,12 +468,38 @@ DECLARE_UVERBS_NAMED_METHOD( reserved), UA_MANDATORY)); +DECLARE_UVERBS_NAMED_METHOD( + UVERBS_METHOD_QUERY_GID_TABLE, + UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_GID_TABLE_ENTRY_SIZE, u64, + UA_MANDATORY), + UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_QUERY_GID_TABLE_FLAGS, u32, + UA_OPTIONAL), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES, + UVERBS_ATTR_MIN_SIZE(0), UA_MANDATORY), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_GID_TABLE_RESP_NUM_ENTRIES, + UVERBS_ATTR_TYPE(u64), UA_MANDATORY)); + +DECLARE_UVERBS_NAMED_METHOD( + UVERBS_METHOD_QUERY_GID_ENTRY, + UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_GID_ENTRY_PORT, u32, + UA_MANDATORY), + UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_GID_ENTRY_GID_INDEX, u32, + UA_MANDATORY), + UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_QUERY_GID_ENTRY_FLAGS, u32, + UA_MANDATORY), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_GID_ENTRY_RESP_ENTRY, + UVERBS_ATTR_STRUCT(struct ib_uverbs_gid_entry, + netdev_ifindex), + UA_MANDATORY)); + DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE, &UVERBS_METHOD(UVERBS_METHOD_GET_CONTEXT), &UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE), &UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES), &UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT), - &UVERBS_METHOD(UVERBS_METHOD_QUERY_CONTEXT)); + &UVERBS_METHOD(UVERBS_METHOD_QUERY_CONTEXT), + &UVERBS_METHOD(UVERBS_METHOD_QUERY_GID_TABLE), + &UVERBS_METHOD(UVERBS_METHOD_QUERY_GID_ENTRY)); const struct uapi_definition uverbs_def_obj_device[] = { UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE), diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index ab104bc2b8e5..b585db4ef9b4 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -138,9 +138,9 @@ union ib_gid { extern union ib_gid zgid; enum ib_gid_type { - IB_GID_TYPE_IB = 0, - IB_GID_TYPE_ROCE = 1, - IB_GID_TYPE_ROCE_UDP_ENCAP = 2, + IB_GID_TYPE_IB = IB_UVERBS_GID_TYPE_IB, + IB_GID_TYPE_ROCE = IB_UVERBS_GID_TYPE_ROCE_V1, + IB_GID_TYPE_ROCE_UDP_ENCAP = IB_UVERBS_GID_TYPE_ROCE_V2, IB_GID_TYPE_SIZE }; diff --git a/include/uapi/rdma/ib_user_ioctl_cmds.h b/include/uapi/rdma/ib_user_ioctl_cmds.h index 99dcabf61a71..7968a1845355 100644 --- a/include/uapi/rdma/ib_user_ioctl_cmds.h +++ b/include/uapi/rdma/ib_user_ioctl_cmds.h @@ -70,6 +70,8 @@ enum uverbs_methods_device { UVERBS_METHOD_QUERY_PORT, UVERBS_METHOD_GET_CONTEXT, UVERBS_METHOD_QUERY_CONTEXT, + UVERBS_METHOD_QUERY_GID_TABLE, + UVERBS_METHOD_QUERY_GID_ENTRY, }; enum uverbs_attrs_invoke_write_cmd_attr_ids { @@ -352,4 +354,18 @@ enum uverbs_attrs_async_event_create { UVERBS_ATTR_ASYNC_EVENT_ALLOC_FD_HANDLE, }; +enum uverbs_attrs_query_gid_table_cmd_attr_ids { + UVERBS_ATTR_QUERY_GID_TABLE_ENTRY_SIZE, + UVERBS_ATTR_QUERY_GID_TABLE_FLAGS, + UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES, + UVERBS_ATTR_QUERY_GID_TABLE_RESP_NUM_ENTRIES, +}; + +enum uverbs_attrs_query_gid_entry_cmd_attr_ids { + UVERBS_ATTR_QUERY_GID_ENTRY_PORT, + UVERBS_ATTR_QUERY_GID_ENTRY_GID_INDEX, + UVERBS_ATTR_QUERY_GID_ENTRY_FLAGS, + UVERBS_ATTR_QUERY_GID_ENTRY_RESP_ENTRY, +}; + #endif diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h index d5ac65ae2557..cfea82acfe57 100644 --- a/include/uapi/rdma/ib_user_ioctl_verbs.h +++ b/include/uapi/rdma/ib_user_ioctl_verbs.h @@ -250,6 +250,12 @@ enum rdma_driver_id { RDMA_DRIVER_SIW, }; +enum ib_uverbs_gid_type { + IB_UVERBS_GID_TYPE_IB, + IB_UVERBS_GID_TYPE_ROCE_V1, + IB_UVERBS_GID_TYPE_ROCE_V2, +}; + struct ib_uverbs_gid_entry { __aligned_u64 gid[2]; __u32 gid_index;