From patchwork Thu Jan 16 12:58:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinpu Wang X-Patchwork-Id: 11336737 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 1CCC113A0 for ; Thu, 16 Jan 2020 12:59:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E562C2073A for ; Thu, 16 Jan 2020 12:59:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VLnvYDTG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726884AbgAPM71 (ORCPT ); Thu, 16 Jan 2020 07:59:27 -0500 Received: from mail-ed1-f66.google.com ([209.85.208.66]:40851 "EHLO mail-ed1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726935AbgAPM71 (ORCPT ); Thu, 16 Jan 2020 07:59:27 -0500 Received: by mail-ed1-f66.google.com with SMTP id b8so18824201edx.7; Thu, 16 Jan 2020 04:59:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=VmWlPjXV1LrVahy9gSs2c+zyC+OwmGljcCnMGXAWHB4=; b=VLnvYDTGvWG2zpYMPhzbc/Se+L9CcNwbq0YS2zUpiAmkMG92TvXzwpO7KSsQ3DRMr6 UM7eAdADJ5bF4TeRstGHg6O2sksLr/wXc3uWd0xD6NWrsCxBPxwlHA2UTM0JDdyvOJM4 aCoy4tshwlXduQKDhoyF4KdAuD1dLhE6mtYE2nA86DhMnVTrvqumoD9F/7YvCx96gHSA 1Sesujh2Tm3ks+xAUBxs/s0abcBq40O8UBTgJ032AqmT/8XC5q4lH8vgdJTfK4EXYhZ3 4sA6LydT4gt5Igfvw4EzWHpX+Zh9Qm/kGAcINkKsfhpTmsTF5EAlZNZBvHj4tzLOs3ac Ed7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=VmWlPjXV1LrVahy9gSs2c+zyC+OwmGljcCnMGXAWHB4=; b=sUlfLj1g8y6Vlau272+/oUGMZkP3oBNyVf8ikLRVSgtwHhMQf6kKeidUeJ8ZggbXgF KjcPRgfhb3tMXwtpWa4QJYjW1Ao4K6jmRn/AY3a17WQY3iu0XjlTNUxzyDQVLwh2Wyaw D5YTCmDTQd3XwQFu68JzyEqvxB9zq/FhM3DI5qBR4Ukd5uQgcyMX7CN5+Qp3wgWIvHOb f3BFPl/+SojJTlRQPqtnOqcb+BLhYl8oC9cAy6GxxeOL0L1lnik9A5x0hTjc0mtBg2vE PE/cHr77JfxAkdwnWRN9f5+PaH4O9Eqlg4c30px4OlElzHjEC7Zs61PRStT4tYVSBWMq eLqw== X-Gm-Message-State: APjAAAWMGxl1ZFS64y03WwjblFhnhz05ngm4VGo53pMWiEMA2B8AObT5 F6/CYOpHSs4BE0T+UT7ypeNXapwQ X-Google-Smtp-Source: APXvYqwM4lMUfTQu7acNdBDLyltbJAWYCyQbYMmI76DgWlQO/AjA17X6+gjLOobU0N7Bd2ebcZx1OQ== X-Received: by 2002:aa7:d714:: with SMTP id t20mr5094224edq.93.1579179564564; Thu, 16 Jan 2020 04:59:24 -0800 (PST) Received: from jwang-Latitude-5491.fritz.box ([2001:16b8:4956:1800:d464:b0ea:3ef4:abbb]) by smtp.gmail.com with ESMTPSA id b13sm697289ejl.5.2020.01.16.04.59.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Jan 2020 04:59:24 -0800 (PST) From: Jack Wang To: linux-block@vger.kernel.org, linux-rdma@vger.kernel.org Cc: axboe@kernel.dk, hch@infradead.org, sagi@grimberg.me, bvanassche@acm.org, leon@kernel.org, dledford@redhat.com, jgg@ziepe.ca, danil.kipnis@cloud.ionos.com, jinpu.wang@cloud.ionos.com, rpenyaev@suse.de Subject: [PATCH v7 05/25] RDMA/rtrs: client: private header with client structs and functions Date: Thu, 16 Jan 2020 13:58:55 +0100 Message-Id: <20200116125915.14815-6-jinpuwang@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200116125915.14815-1-jinpuwang@gmail.com> References: <20200116125915.14815-1-jinpuwang@gmail.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Jack Wang This header describes main structs and functions used by rtrs-client module, mainly for managing rtrs sessions, creating/destroying sysfs entries, accounting statistics on client side. Signed-off-by: Danil Kipnis Signed-off-by: Jack Wang --- drivers/infiniband/ulp/rtrs/rtrs-clt.h | 270 +++++++++++++++++++++++++ 1 file changed, 270 insertions(+) create mode 100644 drivers/infiniband/ulp/rtrs/rtrs-clt.h diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.h b/drivers/infiniband/ulp/rtrs/rtrs-clt.h new file mode 100644 index 000000000000..64aea98e8b5e --- /dev/null +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.h @@ -0,0 +1,270 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * RDMA Transport Layer + * + * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved. + * + * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. + * + * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved. + */ + +#ifndef RTRS_CLT_H +#define RTRS_CLT_H + +#include +#include "rtrs-pri.h" + +/** + * enum rtrs_clt_state - Client states. + */ +enum rtrs_clt_state { + RTRS_CLT_CONNECTING, + RTRS_CLT_CONNECTING_ERR, + RTRS_CLT_RECONNECTING, + RTRS_CLT_CONNECTED, + RTRS_CLT_CLOSING, + RTRS_CLT_CLOSED, + RTRS_CLT_DEAD, +}; + +enum rtrs_mp_policy { + MP_POLICY_RR, + MP_POLICY_MIN_INFLIGHT, +}; + +/* see Documentation/ABI/testing/sysfs-class-rtrs-client for details */ +struct rtrs_clt_stats_reconnects { + int successful_cnt; + int fail_cnt; +}; + +/* see Documentation/ABI/testing/sysfs-class-rtrs-client for details */ +struct rtrs_clt_stats_wc_comp { + u32 cnt; + u64 total_cnt; +}; + +/* see Documentation/ABI/testing/sysfs-class-rtrs-client for details */ +struct rtrs_clt_stats_cpu_migr { + atomic_t from; + int to; +}; + +/* stats for Read and write operation. + * see Documentation/ABI/testing/sysfs-class-rtrs-client for details + */ +struct rtrs_clt_stats_rdma { + struct { + u64 cnt; + u64 size_total; + } dir[2]; + + u64 failover_cnt; +}; + +struct rtrs_clt_stats_rdma_lat { + u64 read; + u64 write; +}; + +#define MAX_LOG_LAT 16 +#define MIN_LOG_LAT 0 +#define LOG_LAT_SZ (MAX_LOG_LAT - MIN_LOG_LAT + 2) + +struct rtrs_clt_stats_pcpu { + struct rtrs_clt_stats_cpu_migr cpu_migr; + struct rtrs_clt_stats_rdma rdma; + struct rtrs_clt_stats_rdma_lat rdma_lat_distr[LOG_LAT_SZ]; + struct rtrs_clt_stats_rdma_lat rdma_lat_max; + struct rtrs_clt_stats_wc_comp wc_comp; +}; + +struct rtrs_clt_stats { + bool enable_rdma_lat; + struct rtrs_clt_stats_pcpu __percpu *pcpu_stats; + struct rtrs_clt_stats_reconnects reconnects; + atomic_t inflight; +}; + +struct rtrs_clt_con { + struct rtrs_con c; + struct rtrs_iu *rsp_ius; + u32 queue_size; + unsigned int cpu; + atomic_t io_cnt; + int cm_err; +}; + +/** + * rtrs_permit - permits the memory allocation for future RDMA operation. + * Combine with irq pinning to keep IO on same CPU. + */ +struct rtrs_permit { + enum rtrs_clt_con_type con_type; + unsigned int cpu_id; + unsigned int mem_id; + unsigned int mem_off; +}; + +/** + * rtrs_clt_io_req - describes one inflight IO request + */ +struct rtrs_clt_io_req { + struct list_head list; + struct rtrs_iu *iu; + struct scatterlist *sglist; /* list holding user data */ + unsigned int sg_cnt; + unsigned int sg_size; + unsigned int data_len; + unsigned int usr_len; + void *priv; + bool in_use; + struct rtrs_clt_con *con; + struct rtrs_sg_desc *desc; + struct ib_sge *sge; + struct rtrs_permit *permit; + enum dma_data_direction dir; + rtrs_conf_fn *conf; + unsigned long start_jiffies; + + struct ib_mr *mr; + struct ib_cqe inv_cqe; + struct completion inv_comp; + int inv_errno; + bool need_inv_comp; + bool need_inv; +}; + +struct rtrs_rbuf { + u64 addr; + u32 rkey; +}; + +struct rtrs_clt_sess { + struct rtrs_sess s; + struct rtrs_clt *clt; + wait_queue_head_t state_wq; + enum rtrs_clt_state state; + atomic_t connected_cnt; + struct mutex init_mutex; + struct rtrs_clt_io_req *reqs; + struct delayed_work reconnect_dwork; + struct work_struct close_work; + unsigned int reconnect_attempts; + bool established; + struct rtrs_rbuf *rbufs; + size_t max_io_size; + u32 max_hdr_size; + u32 chunk_size; + size_t queue_depth; + u32 max_pages_per_mr; + int max_send_sge; + u32 flags; + struct kobject kobj; + struct kobject kobj_stats; + struct rtrs_clt_stats stats; + /* cache hca_port and hca_name to display in sysfs */ + u8 hca_port; + char hca_name[IB_DEVICE_NAME_MAX]; + struct list_head __percpu + *mp_skip_entry; +}; + +struct rtrs_clt { + struct list_head /* __rcu */ paths_list; + size_t paths_num; + struct rtrs_clt_sess + __rcu * __percpu *pcpu_path; + + bool opened; + uuid_t paths_uuid; + int paths_up; + struct mutex paths_mutex; + struct mutex paths_ev_mutex; + char sessname[NAME_MAX]; + short port; + unsigned int max_reconnect_attempts; + unsigned int reconnect_delay_sec; + unsigned int max_segments; + void *permits; + unsigned long *permits_map; + size_t queue_depth; + size_t max_io_size; + wait_queue_head_t permits_wait; + size_t pdu_sz; + void *priv; + link_clt_ev_fn *link_ev; + struct device dev; + struct kobject kobj_paths; + enum rtrs_mp_policy mp_policy; +}; + +static inline struct rtrs_clt_con *to_clt_con(struct rtrs_con *c) +{ + return container_of(c, struct rtrs_clt_con, c); +} + +static inline struct rtrs_clt_sess *to_clt_sess(struct rtrs_sess *s) +{ + return container_of(s, struct rtrs_clt_sess, s); +} + +#define PERMIT_SIZE(clt) (sizeof(struct rtrs_permit) + (clt)->pdu_sz) +#define GET_PERMIT(clt, idx) ((clt)->permits + PERMIT_SIZE(clt) * (idx)) + +int rtrs_clt_reconnect_from_sysfs(struct rtrs_clt_sess *sess); +int rtrs_clt_disconnect_from_sysfs(struct rtrs_clt_sess *sess); +int rtrs_clt_create_path_from_sysfs(struct rtrs_clt *clt, + struct rtrs_addr *addr); +int rtrs_clt_remove_path_from_sysfs(struct rtrs_clt_sess *sess, + const struct attribute *sysfs_self); + +void rtrs_clt_set_max_reconnect_attempts(struct rtrs_clt *clt, int value); +int rtrs_clt_get_max_reconnect_attempts(const struct rtrs_clt *clt); + +/* rtrs-clt-stats.c */ + +int rtrs_clt_init_stats(struct rtrs_clt_stats *stats); +void rtrs_clt_free_stats(struct rtrs_clt_stats *stats); + +void rtrs_clt_decrease_inflight(struct rtrs_clt_stats *s); +void rtrs_clt_inc_failover_cnt(struct rtrs_clt_stats *s); + +void rtrs_clt_update_rdma_lat(struct rtrs_clt_stats *s, bool read, + unsigned long ms); +void rtrs_clt_update_wc_stats(struct rtrs_clt_con *con); +void rtrs_clt_update_all_stats(struct rtrs_clt_io_req *req, int dir); + +int rtrs_clt_reset_rdma_lat_distr_stats(struct rtrs_clt_stats *stats, + bool enable); +ssize_t rtrs_clt_stats_rdma_lat_distr_to_str(struct rtrs_clt_stats *stats, + char *page, size_t len); +int rtrs_clt_reset_cpu_migr_stats(struct rtrs_clt_stats *stats, bool enable); +int rtrs_clt_stats_migration_cnt_to_str(struct rtrs_clt_stats *stats, char *buf, + size_t len); +int rtrs_clt_reset_reconnects_stat(struct rtrs_clt_stats *stats, bool enable); +int rtrs_clt_stats_reconnects_to_str(struct rtrs_clt_stats *stats, char *buf, + size_t len); +int rtrs_clt_reset_wc_comp_stats(struct rtrs_clt_stats *stats, bool enable); +int rtrs_clt_stats_wc_completion_to_str(struct rtrs_clt_stats *stats, char *buf, + size_t len); +int rtrs_clt_reset_rdma_stats(struct rtrs_clt_stats *stats, bool enable); +ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats, + char *page, size_t len); +int rtrs_clt_reset_all_stats(struct rtrs_clt_stats *stats, bool enable); +ssize_t rtrs_clt_reset_all_help(struct rtrs_clt_stats *stats, + char *page, size_t len); + +/* rtrs-clt-sysfs.c */ + +int rtrs_clt_create_sysfs_root_folders(struct rtrs_clt *clt); +int rtrs_clt_create_sysfs_root_files(struct rtrs_clt *clt); +void rtrs_clt_destroy_sysfs_root_folders(struct rtrs_clt *clt); +void rtrs_clt_destroy_sysfs_root_files(struct rtrs_clt *clt); + +int rtrs_clt_create_sess_files(struct rtrs_clt_sess *sess); +void rtrs_clt_destroy_sess_files(struct rtrs_clt_sess *sess, + const struct attribute *sysfs_self); + +#endif /* RTRS_CLT_H */