From patchwork Fri Mar 20 12:16:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinpu Wang X-Patchwork-Id: 11448953 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 711D014B4 for ; Fri, 20 Mar 2020 12:17:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3CFE020776 for ; Fri, 20 Mar 2020 12:17:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cloud.ionos.com header.i=@cloud.ionos.com header.b="df9GtZ7b" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726893AbgCTMRM (ORCPT ); Fri, 20 Mar 2020 08:17:12 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:38093 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727117AbgCTMRL (ORCPT ); Fri, 20 Mar 2020 08:17:11 -0400 Received: by mail-wr1-f68.google.com with SMTP id s1so7175002wrv.5 for ; Fri, 20 Mar 2020 05:17:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloud.ionos.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=whXWF5YoesbPi0LflVcbI+Mu5FtT1d6pQGlVhGA5kFs=; b=df9GtZ7bscP89QTBQFiG6bvA5eTlicD88Aj1Gyga3mubuFZmuzqkCs/RlLUW1A7dku 12u7LnuyZPOViVCnCch99fGqeiRQQFTMWwanqi9WzLTysAZ0GQ6VN+9vI1o55xcH4AZn ELzpNXXBcGoGLo8xEh3t/AGDDRzCZzNwBvm3CujiXYteeKKPtlzf9yKrrOvuaBRdkmE/ rlI6iF1on3k89xbkN0RxZAwS/YMEhUweYdLfBlL2ziXRt/xYSYZbyVSUzAF+8DDrME80 zx6/4oNPxZNNh3t6Gs6DJOiidmlfbOGumREkD/ejwY20wlraDvIyqizO4Qkz6coE1Pry jrbA== 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=whXWF5YoesbPi0LflVcbI+Mu5FtT1d6pQGlVhGA5kFs=; b=gbZNihHzmpUI/RRc63ierrqN6htZMVbkht9Kw7vqK48gF8Q0BcZV4VI8HUJEGvukBI tP5vwxZQssxSnVzu5ICaI3WBZmjHz38hVM3rRc2rr67QwEtbydpTW23N4MfGgsqy5G4p SlEKs2OtyyLdWObwjcAr75zx7k+FDYVfdl5xchgHh40q0OLKgpyAYDYzCJGf5QWoxXGl upVqfAMTPXtERYcZ0bcT6peNS3UlPsfYbaelKJVjlNrUfF8wN5vU0JQcXnCiu3c7Vdwj 0U3QPrSDclpkDYQGt/ncK0Va+9Iawl9QvWE+059vXNz5CIg+xuiPM5aBLEjUQvY7ePhn Coyg== X-Gm-Message-State: ANhLgQ3hShRcCoYtfik2Jx3e2rKXYL5nPC9z3X75a8b6ws0odFpYxOD3 rNLvqjNQ6p1mBYWTD1B5XKnzvA== X-Google-Smtp-Source: ADFU+vvgppionoRrK1Mx07Ps/wTJ1cjKFdyjYaWYcRIxe8JFX+X0eNPMTk1IfSJd6mkf8awCwUwYjw== X-Received: by 2002:adf:f7cf:: with SMTP id a15mr6074399wrq.224.1584706628272; Fri, 20 Mar 2020 05:17:08 -0700 (PDT) Received: from jwang-Latitude-5491.fritz.box ([2001:16b8:4927:3900:64cf:432e:192d:75a2]) by smtp.gmail.com with ESMTPSA id j39sm8593662wre.11.2020.03.20.05.17.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Mar 2020 05:17:07 -0700 (PDT) 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, pankaj.gupta@cloud.ionos.com Subject: [PATCH v11 05/26] RDMA/rtrs: client: private header with client structs and functions Date: Fri, 20 Mar 2020 13:16:36 +0100 Message-Id: <20200320121657.1165-6-jinpu.wang@cloud.ionos.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200320121657.1165-1-jinpu.wang@cloud.ionos.com> References: <20200320121657.1165-1-jinpu.wang@cloud.ionos.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org 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 | 252 +++++++++++++++++++++++++ 1 file changed, 252 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..d612d00e3d18 --- /dev/null +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.h @@ -0,0 +1,252 @@ +/* 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_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_pcpu { + struct rtrs_clt_stats_cpu_migr cpu_migr; + struct rtrs_clt_stats_rdma rdma; +}; + +struct rtrs_clt_stats { + 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; + void (*conf)(void *priv, int errno); + 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 paths_list; /* rcu protected list */ + size_t paths_num; + struct rtrs_clt_sess + __rcu * __percpu *pcpu_path; + 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; + void (*link_ev)(void *priv, + enum rtrs_clt_link_ev 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); +} + +static inline int permit_size(struct rtrs_clt *clt) +{ + return sizeof(struct rtrs_permit) + clt->pdu_sz; +} + +static inline struct rtrs_permit *get_permit(struct rtrs_clt *clt, int idx) +{ + return (struct rtrs_permit *)(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_inc_failover_cnt(struct rtrs_clt_stats *s); + +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 */