From patchwork Wed Jun 2 18:42:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shai Malin X-Patchwork-Id: 12295527 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-21.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 07183C47083 for ; Wed, 2 Jun 2021 18:43:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDC7261369 for ; Wed, 2 Jun 2021 18:43:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229665AbhFBSpU (ORCPT ); Wed, 2 Jun 2021 14:45:20 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:12438 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229468AbhFBSpQ (ORCPT ); Wed, 2 Jun 2021 14:45:16 -0400 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 152IeJk8013044; Wed, 2 Jun 2021 11:43:18 -0700 Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0b-0016f401.pphosted.com with ESMTP id 38wufgv8jh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 02 Jun 2021 11:43:17 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 2 Jun 2021 11:43:15 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 11:43:11 -0700 From: Shai Malin To: , , , , CC: , , , , , , , , , , Dean Balandin Subject: [PATCH 1/8] nvme-tcp-offload: Add nvme-tcp-offload - NVMeTCP HW offload ULP Date: Wed, 2 Jun 2021 21:42:39 +0300 Message-ID: <20210602184246.14184-2-smalin@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210602184246.14184-1-smalin@marvell.com> References: <20210602184246.14184-1-smalin@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: mpncSV4oOhqoIoMQLwcQHUkLnwoRcAyj X-Proofpoint-GUID: mpncSV4oOhqoIoMQLwcQHUkLnwoRcAyj X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-02_10:2021-06-02,2021-06-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch will present the structure for the NVMeTCP offload common layer driver. This module is added under "drivers/nvme/host/" and future offload drivers which will register to it will be placed under "drivers/nvme/hw". This new driver will be enabled by the Kconfig "NVM Express over Fabrics TCP offload commmon layer". In order to support the new transport type, for host mode, no change is needed. Each new vendor-specific offload driver will register to this ULP during its probe function, by filling out the nvme_tcp_ofld_dev->ops and nvme_tcp_ofld_dev->private_data and calling nvme_tcp_ofld_register_dev with the initialized struct. The internal implementation: - tcp-offload.h: Includes all common structs and ops to be used and shared by offload drivers. - tcp-offload.c: Includes the init function which registers as a NVMf transport just like any other transport. Acked-by: Igor Russkikh Signed-off-by: Dean Balandin Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Hannes Reinecke Reviewed-by: Himanshu Madhani --- MAINTAINERS | 8 ++ drivers/nvme/host/Kconfig | 17 +++ drivers/nvme/host/Makefile | 3 + drivers/nvme/host/tcp-offload.c | 124 ++++++++++++++++++++ drivers/nvme/host/tcp-offload.h | 199 ++++++++++++++++++++++++++++++++ 5 files changed, 351 insertions(+) create mode 100644 drivers/nvme/host/tcp-offload.c create mode 100644 drivers/nvme/host/tcp-offload.h diff --git a/MAINTAINERS b/MAINTAINERS index 5c90148f0369..64cdffb8aaed 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13003,6 +13003,14 @@ F: drivers/nvme/host/ F: include/linux/nvme.h F: include/uapi/linux/nvme_ioctl.h +NVM EXPRESS TCP OFFLOAD TRANSPORT DRIVERS +M: Shai Malin +M: Ariel Elior +L: linux-nvme@lists.infradead.org +S: Supported +F: drivers/nvme/host/tcp-offload.c +F: drivers/nvme/host/tcp-offload.h + NVM EXPRESS FC TRANSPORT DRIVERS M: James Smart L: linux-nvme@lists.infradead.org diff --git a/drivers/nvme/host/Kconfig b/drivers/nvme/host/Kconfig index 494675aeaaad..9c6f4d776daf 100644 --- a/drivers/nvme/host/Kconfig +++ b/drivers/nvme/host/Kconfig @@ -85,3 +85,20 @@ config NVME_TCP from https://github.com/linux-nvme/nvme-cli. If unsure, say N. + +config NVME_TCP_OFFLOAD + tristate "NVM Express over Fabrics TCP offload common layer" + default m + depends on BLOCK + depends on INET + select NVME_CORE + select NVME_FABRICS + help + This provides support for the NVMe over Fabrics protocol using + the TCP offload transport. This allows you to use remote block devices + exported using the NVMe protocol set. + + To configure a NVMe over Fabrics controller use the nvme-cli tool + from https://github.com/linux-nvme/nvme-cli. + + If unsure, say N. diff --git a/drivers/nvme/host/Makefile b/drivers/nvme/host/Makefile index cbc509784b2e..3c3fdf83ce38 100644 --- a/drivers/nvme/host/Makefile +++ b/drivers/nvme/host/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_NVME_FABRICS) += nvme-fabrics.o obj-$(CONFIG_NVME_RDMA) += nvme-rdma.o obj-$(CONFIG_NVME_FC) += nvme-fc.o obj-$(CONFIG_NVME_TCP) += nvme-tcp.o +obj-$(CONFIG_NVME_TCP_OFFLOAD) += nvme-tcp-offload.o nvme-core-y := core.o ioctl.o nvme-core-$(CONFIG_TRACING) += trace.o @@ -26,3 +27,5 @@ nvme-rdma-y += rdma.o nvme-fc-y += fc.o nvme-tcp-y += tcp.o + +nvme-tcp-offload-y += tcp-offload.o diff --git a/drivers/nvme/host/tcp-offload.c b/drivers/nvme/host/tcp-offload.c new file mode 100644 index 000000000000..f7aa49f337dc --- /dev/null +++ b/drivers/nvme/host/tcp-offload.c @@ -0,0 +1,124 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2021 Marvell. All rights reserved. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +/* Kernel includes */ +#include +#include + +/* Driver includes */ +#include "tcp-offload.h" + +static LIST_HEAD(nvme_tcp_ofld_devices); +static DEFINE_MUTEX(nvme_tcp_ofld_devices_mutex); + +/** + * nvme_tcp_ofld_register_dev() - NVMeTCP Offload Library registration + * function. + * @dev: NVMeTCP offload device instance to be registered to the + * common tcp offload instance. + * + * API function that registers the type of vendor specific driver + * being implemented to the common NVMe over TCP offload library. Part of + * the overall init sequence of starting up an offload driver. + */ +int nvme_tcp_ofld_register_dev(struct nvme_tcp_ofld_dev *dev) +{ + struct nvme_tcp_ofld_ops *ops = dev->ops; + + if (!ops->claim_dev || + !ops->setup_ctrl || + !ops->release_ctrl || + !ops->create_queue || + !ops->drain_queue || + !ops->destroy_queue || + !ops->poll_queue || + !ops->send_req) + return -EINVAL; + + mutex_lock(&nvme_tcp_ofld_devices_mutex); + list_add_tail(&dev->entry, &nvme_tcp_ofld_devices); + mutex_unlock(&nvme_tcp_ofld_devices_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(nvme_tcp_ofld_register_dev); + +/** + * nvme_tcp_ofld_unregister_dev() - NVMeTCP Offload Library unregistration + * function. + * @dev: NVMeTCP offload device instance to be unregistered from the + * common tcp offload instance. + * + * API function that unregisters the type of vendor specific driver being + * implemented from the common NVMe over TCP offload library. + * Part of the overall exit sequence of unloading the implemented driver. + */ +void nvme_tcp_ofld_unregister_dev(struct nvme_tcp_ofld_dev *dev) +{ + mutex_lock(&nvme_tcp_ofld_devices_mutex); + list_del(&dev->entry); + mutex_unlock(&nvme_tcp_ofld_devices_mutex); +} +EXPORT_SYMBOL_GPL(nvme_tcp_ofld_unregister_dev); + +/** + * nvme_tcp_ofld_report_queue_err() - NVMeTCP Offload report error event + * callback function. Pointed to by nvme_tcp_ofld_queue->report_err. + * @queue: NVMeTCP offload queue instance on which the error has occurred. + * + * API function that allows the vendor specific offload driver to reports errors + * to the common offload layer, to invoke error recovery. + */ +int nvme_tcp_ofld_report_queue_err(struct nvme_tcp_ofld_queue *queue) +{ + /* Placeholder - invoke error recovery flow */ + + return 0; +} + +/** + * nvme_tcp_ofld_req_done() - NVMeTCP Offload request done callback + * function. Pointed to by nvme_tcp_ofld_req->done. + * Handles both NVME_TCP_F_DATA_SUCCESS flag and NVMe CQ. + * @req: NVMeTCP offload request to complete. + * @result: The nvme_result. + * @status: The completion status. + * + * API function that allows the vendor specific offload driver to report request + * completions to the common offload layer. + */ +void nvme_tcp_ofld_req_done(struct nvme_tcp_ofld_req *req, + union nvme_result *result, + __le16 status) +{ + /* Placeholder - complete request with/without error */ +} + +static struct nvmf_transport_ops nvme_tcp_ofld_transport = { + .name = "tcp_offload", + .module = THIS_MODULE, + .required_opts = NVMF_OPT_TRADDR, + .allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_NR_WRITE_QUEUES | + NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO | + NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_HDR_DIGEST | + NVMF_OPT_DATA_DIGEST | NVMF_OPT_NR_POLL_QUEUES | + NVMF_OPT_TOS, +}; + +static int __init nvme_tcp_ofld_init_module(void) +{ + nvmf_register_transport(&nvme_tcp_ofld_transport); + + return 0; +} + +static void __exit nvme_tcp_ofld_cleanup_module(void) +{ + nvmf_unregister_transport(&nvme_tcp_ofld_transport); +} + +module_init(nvme_tcp_ofld_init_module); +module_exit(nvme_tcp_ofld_cleanup_module); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/nvme/host/tcp-offload.h b/drivers/nvme/host/tcp-offload.h new file mode 100644 index 000000000000..520a0ea6f4b8 --- /dev/null +++ b/drivers/nvme/host/tcp-offload.h @@ -0,0 +1,199 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2021 Marvell. All rights reserved. + */ + +/* Linux includes */ +#include +#include +#include +#include + +/* Driver includes */ +#include "nvme.h" +#include "fabrics.h" + +/* Forward declarations */ +struct nvme_tcp_ofld_ops; + +/* Representation of a vendor-specific device. This is the struct used to + * register to the offload layer by the vendor-specific driver during its probe + * function. + * Allocated by vendor-specific driver. + */ +struct nvme_tcp_ofld_dev { + struct list_head entry; + struct net_device *ndev; + struct nvme_tcp_ofld_ops *ops; + + /* Vendor specific driver context */ + int num_hw_vectors; +}; + +/* Per IO struct holding the nvme_request and command + * Allocated by blk-mq. + */ +struct nvme_tcp_ofld_req { + struct nvme_request req; + struct nvme_command nvme_cmd; + struct list_head queue_entry; + struct nvme_tcp_ofld_queue *queue; + + /* Vendor specific driver context */ + void *private_data; + + /* async flag is used to distinguish between async and IO flow + * in common send_req() of nvme_tcp_ofld_ops. + */ + bool async; + + void (*done)(struct nvme_tcp_ofld_req *req, + union nvme_result *result, + __le16 status); +}; + +enum nvme_tcp_ofld_queue_flags { + NVME_TCP_OFLD_Q_ALLOCATED = 0, + NVME_TCP_OFLD_Q_LIVE = 1, +}; + +/* Allocated by nvme_tcp_ofld */ +struct nvme_tcp_ofld_queue { + /* Offload device associated to this queue */ + struct nvme_tcp_ofld_dev *dev; + struct nvme_tcp_ofld_ctrl *ctrl; + unsigned long flags; + size_t cmnd_capsule_len; + + u8 hdr_digest; + u8 data_digest; + u8 tos; + + /* Vendor specific driver context */ + void *private_data; + + /* Error callback function */ + int (*report_err)(struct nvme_tcp_ofld_queue *queue); +}; + +/* Connectivity (routing) params used for establishing a connection */ +struct nvme_tcp_ofld_ctrl_con_params { + struct sockaddr_storage remote_ip_addr; + + /* If NVMF_OPT_HOST_TRADDR is provided it will be set in local_ip_addr + * in nvme_tcp_ofld_create_ctrl(). + * If NVMF_OPT_HOST_TRADDR is not provided the local_ip_addr will be + * initialized by claim_dev(). + */ + struct sockaddr_storage local_ip_addr; +}; + +/* Allocated by nvme_tcp_ofld */ +struct nvme_tcp_ofld_ctrl { + struct nvme_ctrl nctrl; + struct list_head list; + struct nvme_tcp_ofld_dev *dev; + + /* admin and IO queues */ + struct blk_mq_tag_set tag_set; + struct blk_mq_tag_set admin_tag_set; + struct nvme_tcp_ofld_queue *queues; + + struct work_struct err_work; + struct delayed_work connect_work; + + /* + * Each entry in the array indicates the number of queues of + * corresponding type. + */ + u32 io_queues[HCTX_MAX_TYPES]; + + /* Connectivity params */ + struct nvme_tcp_ofld_ctrl_con_params conn_params; + + /* Vendor specific driver context */ + void *private_data; +}; + +struct nvme_tcp_ofld_ops { + const char *name; + struct module *module; + + /* For vendor-specific driver to report what opts it supports. + * It could be different than the ULP supported opts due to hardware + * limitations. Also it could be different among different vendor + * drivers. + */ + int required_opts; /* bitmap using enum nvmf_parsing_opts */ + int allowed_opts; /* bitmap using enum nvmf_parsing_opts */ + + /* For vendor-specific max num of segments and IO sizes */ + u32 max_hw_sectors; + u32 max_segments; + + /** + * claim_dev: Return True if addr is reachable via offload device. + * @dev: The offload device to check. + * @ctrl: The offload ctrl have the conn_params field. The + * conn_params is to be filled with routing params by the lower + * driver. + */ + int (*claim_dev)(struct nvme_tcp_ofld_dev *dev, + struct nvme_tcp_ofld_ctrl *ctrl); + + /** + * setup_ctrl: Setup device specific controller structures. + * @ctrl: The offload ctrl. + */ + int (*setup_ctrl)(struct nvme_tcp_ofld_ctrl *ctrl); + + /** + * release_ctrl: Release/Free device specific controller structures. + * @ctrl: The offload ctrl. + */ + int (*release_ctrl)(struct nvme_tcp_ofld_ctrl *ctrl); + + /** + * create_queue: Create offload queue and establish TCP + NVMeTCP + * (icreq+icresp) connection. Return true on successful connection. + * Based on nvme_tcp_alloc_queue. + * @queue: The queue itself - used as input and output. + * @qid: The queue ID associated with the requested queue. + * @q_size: The queue depth. + */ + int (*create_queue)(struct nvme_tcp_ofld_queue *queue, int qid, + size_t queue_size); + + /** + * drain_queue: Drain a given queue - blocking function call. + * Return from this function ensures that no additional + * completions will arrive on this queue and that the HW will + * not access host memory. + * @queue: The queue to drain. + */ + void (*drain_queue)(struct nvme_tcp_ofld_queue *queue); + + /** + * destroy_queue: Close the TCP + NVMeTCP connection of a given queue + * and make sure its no longer active (no completions will arrive on the + * queue). + * @queue: The queue to destroy. + */ + void (*destroy_queue)(struct nvme_tcp_ofld_queue *queue); + + /** + * poll_queue: Poll a given queue for completions. + * @queue: The queue to poll. + */ + int (*poll_queue)(struct nvme_tcp_ofld_queue *queue); + + /** + * send_req: Dispatch a request. Returns the execution status. + * @req: Ptr to request to be sent. + */ + int (*send_req)(struct nvme_tcp_ofld_req *req); +}; + +/* Exported functions for lower vendor specific offload drivers */ +int nvme_tcp_ofld_register_dev(struct nvme_tcp_ofld_dev *dev); +void nvme_tcp_ofld_unregister_dev(struct nvme_tcp_ofld_dev *dev); From patchwork Wed Jun 2 18:42:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shai Malin X-Patchwork-Id: 12295525 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01B25C4708F for ; Wed, 2 Jun 2021 18:43:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DED9561287 for ; Wed, 2 Jun 2021 18:43:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229640AbhFBSpT (ORCPT ); Wed, 2 Jun 2021 14:45:19 -0400 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:13744 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229467AbhFBSpM (ORCPT ); Wed, 2 Jun 2021 14:45:12 -0400 Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 152IeBWo000419; Wed, 2 Jun 2021 11:43:22 -0700 Received: from dc5-exch02.marvell.com ([199.233.59.182]) by mx0a-0016f401.pphosted.com with ESMTP id 38xe7xrced-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 02 Jun 2021 11:43:22 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 2 Jun 2021 11:43:20 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 11:43:16 -0700 From: Shai Malin To: , , , , CC: , , , , , , , , , , Arie Gershberg Subject: [PATCH 2/8] nvme-fabrics: Move NVMF_ALLOWED_OPTS and NVMF_REQUIRED_OPTS definitions Date: Wed, 2 Jun 2021 21:42:40 +0300 Message-ID: <20210602184246.14184-3-smalin@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210602184246.14184-1-smalin@marvell.com> References: <20210602184246.14184-1-smalin@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: fYRgOKTKNL5-jjWcIfAKRnp9VpoNDq23 X-Proofpoint-GUID: fYRgOKTKNL5-jjWcIfAKRnp9VpoNDq23 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-02_10:2021-06-02,2021-06-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Prabhakar Kushwaha Move NVMF_ALLOWED_OPTS and NVMF_REQUIRED_OPTS definitions to header file, so it can be used by the different HW devices. NVMeTCP offload devices might have different limitations of the allowed options, for example, a device that does not support all the queue types. With tcp and rdma, only the nvme-tcp and nvme-rdma layers handle those attributes and the HW devices do not create any limitations for the allowed options. An alternative design could be to add separate fields in nvme_tcp_ofld_ops such as max_hw_sectors and max_segments that we already have in this series. Acked-by: Igor Russkikh Signed-off-by: Arie Gershberg Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Himanshu Madhani Reviewed-by: Hannes Reinecke Acked-by: Sagi Grimberg --- drivers/nvme/host/fabrics.c | 7 ------- drivers/nvme/host/fabrics.h | 7 +++++++ 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c index 34a84d2086c7..e8f6b8f9fd35 100644 --- a/drivers/nvme/host/fabrics.c +++ b/drivers/nvme/host/fabrics.c @@ -947,13 +947,6 @@ void nvmf_free_options(struct nvmf_ctrl_options *opts) } EXPORT_SYMBOL_GPL(nvmf_free_options); -#define NVMF_REQUIRED_OPTS (NVMF_OPT_TRANSPORT | NVMF_OPT_NQN) -#define NVMF_ALLOWED_OPTS (NVMF_OPT_QUEUE_SIZE | NVMF_OPT_NR_IO_QUEUES | \ - NVMF_OPT_KATO | NVMF_OPT_HOSTNQN | \ - NVMF_OPT_HOST_ID | NVMF_OPT_DUP_CONNECT |\ - NVMF_OPT_DISABLE_SQFLOW |\ - NVMF_OPT_FAIL_FAST_TMO) - static struct nvme_ctrl * nvmf_create_ctrl(struct device *dev, const char *buf) { diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h index d7f7974dc208..ce7fe3a842b1 100644 --- a/drivers/nvme/host/fabrics.h +++ b/drivers/nvme/host/fabrics.h @@ -68,6 +68,13 @@ enum { NVMF_OPT_FAIL_FAST_TMO = 1 << 20, }; +#define NVMF_REQUIRED_OPTS (NVMF_OPT_TRANSPORT | NVMF_OPT_NQN) +#define NVMF_ALLOWED_OPTS (NVMF_OPT_QUEUE_SIZE | NVMF_OPT_NR_IO_QUEUES | \ + NVMF_OPT_KATO | NVMF_OPT_HOSTNQN | \ + NVMF_OPT_HOST_ID | NVMF_OPT_DUP_CONNECT |\ + NVMF_OPT_DISABLE_SQFLOW |\ + NVMF_OPT_FAIL_FAST_TMO) + /** * struct nvmf_ctrl_options - Used to hold the options specified * with the parsing opts enum. From patchwork Wed Jun 2 18:42:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shai Malin X-Patchwork-Id: 12295529 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1E0EC4708F for ; Wed, 2 Jun 2021 18:43:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A73A361369 for ; Wed, 2 Jun 2021 18:43:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229702AbhFBSpW (ORCPT ); Wed, 2 Jun 2021 14:45:22 -0400 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:35186 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229610AbhFBSpR (ORCPT ); Wed, 2 Jun 2021 14:45:17 -0400 Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 152IeM6D000494; Wed, 2 Jun 2021 11:43:26 -0700 Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0a-0016f401.pphosted.com with ESMTP id 38xe7xrcek-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 02 Jun 2021 11:43:26 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 2 Jun 2021 11:43:24 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 11:43:21 -0700 From: Shai Malin To: , , , , CC: , , , , , , , , , Subject: [PATCH 3/8] nvme-fabrics: Expose nvmf_check_required_opts() globally Date: Wed, 2 Jun 2021 21:42:41 +0300 Message-ID: <20210602184246.14184-4-smalin@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210602184246.14184-1-smalin@marvell.com> References: <20210602184246.14184-1-smalin@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: pMZt_AvMPTA-EQzTvRC1eS9M_fk5R1rq X-Proofpoint-GUID: pMZt_AvMPTA-EQzTvRC1eS9M_fk5R1rq X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-02_10:2021-06-02,2021-06-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Prabhakar Kushwaha nvmf_check_required_opts() is used to check if user provided opts has the required_opts or not. if not, it will log which options are not provided. It can be leveraged by nvme-tcp-offload to check if provided opts are supported by this specific vendor driver or not. So expose nvmf_check_required_opts() globally. Acked-by: Igor Russkikh Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Hannes Reinecke --- drivers/nvme/host/fabrics.c | 5 +++-- drivers/nvme/host/fabrics.h | 2 ++ 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c index e8f6b8f9fd35..b4d5d46dae62 100644 --- a/drivers/nvme/host/fabrics.c +++ b/drivers/nvme/host/fabrics.c @@ -865,8 +865,8 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts, return ret; } -static int nvmf_check_required_opts(struct nvmf_ctrl_options *opts, - unsigned int required_opts) +int nvmf_check_required_opts(struct nvmf_ctrl_options *opts, + unsigned int required_opts) { if ((opts->mask & required_opts) != required_opts) { int i; @@ -884,6 +884,7 @@ static int nvmf_check_required_opts(struct nvmf_ctrl_options *opts, return 0; } +EXPORT_SYMBOL_GPL(nvmf_check_required_opts); bool nvmf_ip_options_match(struct nvme_ctrl *ctrl, struct nvmf_ctrl_options *opts) diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h index ce7fe3a842b1..8399fcc063ef 100644 --- a/drivers/nvme/host/fabrics.h +++ b/drivers/nvme/host/fabrics.h @@ -193,5 +193,7 @@ int nvmf_get_address(struct nvme_ctrl *ctrl, char *buf, int size); bool nvmf_should_reconnect(struct nvme_ctrl *ctrl); bool nvmf_ip_options_match(struct nvme_ctrl *ctrl, struct nvmf_ctrl_options *opts); +int nvmf_check_required_opts(struct nvmf_ctrl_options *opts, + unsigned int required_opts); #endif /* _NVME_FABRICS_H */ From patchwork Wed Jun 2 18:42:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shai Malin X-Patchwork-Id: 12295535 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 276AFC4708F for ; Wed, 2 Jun 2021 18:45:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0551D61359 for ; Wed, 2 Jun 2021 18:45:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229758AbhFBSr0 (ORCPT ); Wed, 2 Jun 2021 14:47:26 -0400 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:58108 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229605AbhFBSrZ (ORCPT ); Wed, 2 Jun 2021 14:47:25 -0400 Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 152IeIW8000484; Wed, 2 Jun 2021 11:43:31 -0700 Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0a-0016f401.pphosted.com with ESMTP id 38xe7xrcev-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 02 Jun 2021 11:43:31 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 2 Jun 2021 11:43:29 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 11:43:25 -0700 From: Shai Malin To: , , , , CC: , , , , , , , , , , Dean Balandin Subject: [PATCH 4/8] nvme-tcp-offload: Add device scan implementation Date: Wed, 2 Jun 2021 21:42:42 +0300 Message-ID: <20210602184246.14184-5-smalin@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210602184246.14184-1-smalin@marvell.com> References: <20210602184246.14184-1-smalin@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: gS6yZcn0VTqJoJwleg3CsRnvvUpyxC1W X-Proofpoint-GUID: gS6yZcn0VTqJoJwleg3CsRnvvUpyxC1W X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-02_10:2021-06-02,2021-06-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Dean Balandin As part of create_ctrl(), it scans the registered devices and calls the claim_dev op on each of them, to find the first devices that matches the connection params. Once the correct devices is found (claim_dev returns true), we raise the refcnt of that device and return that device as the device to be used for ctrl currently being created. Acked-by: Igor Russkikh Signed-off-by: Dean Balandin Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Himanshu Madhani Reviewed-by: Hannes Reinecke --- drivers/nvme/host/tcp-offload.c | 77 +++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) diff --git a/drivers/nvme/host/tcp-offload.c b/drivers/nvme/host/tcp-offload.c index f7aa49f337dc..5ee3bbca8770 100644 --- a/drivers/nvme/host/tcp-offload.c +++ b/drivers/nvme/host/tcp-offload.c @@ -13,6 +13,11 @@ static LIST_HEAD(nvme_tcp_ofld_devices); static DEFINE_MUTEX(nvme_tcp_ofld_devices_mutex); +static inline struct nvme_tcp_ofld_ctrl *to_tcp_ofld_ctrl(struct nvme_ctrl *nctrl) +{ + return container_of(nctrl, struct nvme_tcp_ofld_ctrl, nctrl); +} + /** * nvme_tcp_ofld_register_dev() - NVMeTCP Offload Library registration * function. @@ -96,6 +101,77 @@ void nvme_tcp_ofld_req_done(struct nvme_tcp_ofld_req *req, /* Placeholder - complete request with/without error */ } +static struct nvme_tcp_ofld_dev * +nvme_tcp_ofld_lookup_dev(struct nvme_tcp_ofld_ctrl *ctrl) +{ + struct nvme_tcp_ofld_dev *dev; + + mutex_lock(&nvme_tcp_ofld_devices_mutex); + list_for_each_entry(dev, &nvme_tcp_ofld_devices, entry) { + if (dev->ops->claim_dev(dev, ctrl)) + goto out; + } + + dev = NULL; +out: + mutex_unlock(&nvme_tcp_ofld_devices_mutex); + + return dev; +} + +static struct nvme_ctrl * +nvme_tcp_ofld_create_ctrl(struct device *ndev, struct nvmf_ctrl_options *opts) +{ + struct nvme_tcp_ofld_ctrl *ctrl; + struct nvme_tcp_ofld_dev *dev; + struct nvme_ctrl *nctrl; + int rc = 0; + + ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + return ERR_PTR(-ENOMEM); + + nctrl = &ctrl->nctrl; + + /* Init nvme_tcp_ofld_ctrl and nvme_ctrl params based on received opts */ + + /* Find device that can reach the dest addr */ + dev = nvme_tcp_ofld_lookup_dev(ctrl); + if (!dev) { + pr_info("no device found for addr %s:%s.\n", + opts->traddr, opts->trsvcid); + rc = -EINVAL; + goto out_free_ctrl; + } + + /* Increase driver refcnt */ + if (!try_module_get(dev->ops->module)) { + pr_err("try_module_get failed\n"); + dev = NULL; + goto out_free_ctrl; + } + + ctrl->dev = dev; + + if (ctrl->dev->ops->max_hw_sectors) + nctrl->max_hw_sectors = ctrl->dev->ops->max_hw_sectors; + if (ctrl->dev->ops->max_segments) + nctrl->max_segments = ctrl->dev->ops->max_segments; + + /* Init queues */ + + /* Call nvme_init_ctrl */ + + /* Setup ctrl */ + + return nctrl; + +out_free_ctrl: + kfree(ctrl); + + return ERR_PTR(rc); +} + static struct nvmf_transport_ops nvme_tcp_ofld_transport = { .name = "tcp_offload", .module = THIS_MODULE, @@ -105,6 +181,7 @@ static struct nvmf_transport_ops nvme_tcp_ofld_transport = { NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_HDR_DIGEST | NVMF_OPT_DATA_DIGEST | NVMF_OPT_NR_POLL_QUEUES | NVMF_OPT_TOS, + .create_ctrl = nvme_tcp_ofld_create_ctrl, }; static int __init nvme_tcp_ofld_init_module(void) From patchwork Wed Jun 2 18:42:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shai Malin X-Patchwork-Id: 12295537 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85F0CC47083 for ; Wed, 2 Jun 2021 18:45:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6EEAF61359 for ; Wed, 2 Jun 2021 18:45:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229707AbhFBSra (ORCPT ); Wed, 2 Jun 2021 14:47:30 -0400 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:60528 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229489AbhFBSr3 (ORCPT ); Wed, 2 Jun 2021 14:47:29 -0400 Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 152IeKar000490; Wed, 2 Jun 2021 11:43:36 -0700 Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0a-0016f401.pphosted.com with ESMTP id 38xe7xrcfa-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 02 Jun 2021 11:43:35 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 2 Jun 2021 11:43:34 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 11:43:30 -0700 From: Shai Malin To: , , , , CC: , , , , , , , , , , Arie Gershberg Subject: [PATCH 5/8] nvme-tcp-offload: Add controller level implementation Date: Wed, 2 Jun 2021 21:42:43 +0300 Message-ID: <20210602184246.14184-6-smalin@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210602184246.14184-1-smalin@marvell.com> References: <20210602184246.14184-1-smalin@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: MWgS6oVExd3vfDTEzvNf6952l-CP0r4_ X-Proofpoint-GUID: MWgS6oVExd3vfDTEzvNf6952l-CP0r4_ X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-02_10:2021-06-02,2021-06-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Arie Gershberg In this patch we implement controller level functionality including: - create_ctrl. - delete_ctrl. - free_ctrl. The implementation is similar to other nvme fabrics modules, the main difference being that the nvme-tcp-offload ULP calls the vendor specific claim_dev() op with the given TCP/IP parameters to determine which device will be used for this controller. Once found, the vendor specific device and controller will be paired and kept in a controller list managed by the ULP. Acked-by: Igor Russkikh Signed-off-by: Arie Gershberg Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Himanshu Madhani Reviewed-by: Hannes Reinecke --- drivers/nvme/host/tcp-offload.c | 481 +++++++++++++++++++++++++++++++- 1 file changed, 476 insertions(+), 5 deletions(-) diff --git a/drivers/nvme/host/tcp-offload.c b/drivers/nvme/host/tcp-offload.c index 5ee3bbca8770..d05dec9c0add 100644 --- a/drivers/nvme/host/tcp-offload.c +++ b/drivers/nvme/host/tcp-offload.c @@ -12,6 +12,10 @@ static LIST_HEAD(nvme_tcp_ofld_devices); static DEFINE_MUTEX(nvme_tcp_ofld_devices_mutex); +static LIST_HEAD(nvme_tcp_ofld_ctrl_list); +static DEFINE_MUTEX(nvme_tcp_ofld_ctrl_mutex); +static struct blk_mq_ops nvme_tcp_ofld_admin_mq_ops; +static struct blk_mq_ops nvme_tcp_ofld_mq_ops; static inline struct nvme_tcp_ofld_ctrl *to_tcp_ofld_ctrl(struct nvme_ctrl *nctrl) { @@ -119,21 +123,439 @@ nvme_tcp_ofld_lookup_dev(struct nvme_tcp_ofld_ctrl *ctrl) return dev; } +static struct blk_mq_tag_set * +nvme_tcp_ofld_alloc_tagset(struct nvme_ctrl *nctrl, bool admin) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct blk_mq_tag_set *set; + int rc; + + if (admin) { + set = &ctrl->admin_tag_set; + memset(set, 0, sizeof(*set)); + set->ops = &nvme_tcp_ofld_admin_mq_ops; + set->queue_depth = NVME_AQ_MQ_TAG_DEPTH; + set->reserved_tags = NVMF_RESERVED_TAGS; + set->numa_node = nctrl->numa_node; + set->flags = BLK_MQ_F_BLOCKING; + set->cmd_size = sizeof(struct nvme_tcp_ofld_req); + set->driver_data = ctrl; + set->nr_hw_queues = 1; + set->timeout = NVME_ADMIN_TIMEOUT; + } else { + set = &ctrl->tag_set; + memset(set, 0, sizeof(*set)); + set->ops = &nvme_tcp_ofld_mq_ops; + set->queue_depth = nctrl->sqsize + 1; + set->reserved_tags = NVMF_RESERVED_TAGS; + set->numa_node = nctrl->numa_node; + set->flags = BLK_MQ_F_SHOULD_MERGE; + set->cmd_size = sizeof(struct nvme_tcp_ofld_req); + set->driver_data = ctrl; + set->nr_hw_queues = nctrl->queue_count - 1; + set->timeout = NVME_IO_TIMEOUT; + set->nr_maps = nctrl->opts->nr_poll_queues ? HCTX_MAX_TYPES : 2; + } + + rc = blk_mq_alloc_tag_set(set); + if (rc) + return ERR_PTR(rc); + + return set; +} + +static int nvme_tcp_ofld_configure_admin_queue(struct nvme_ctrl *nctrl, + bool new) +{ + int rc; + + /* Placeholder - alloc_admin_queue */ + if (new) { + nctrl->admin_tagset = + nvme_tcp_ofld_alloc_tagset(nctrl, true); + if (IS_ERR(nctrl->admin_tagset)) { + rc = PTR_ERR(nctrl->admin_tagset); + nctrl->admin_tagset = NULL; + goto out_destroy_queue; + } + + nctrl->fabrics_q = blk_mq_init_queue(nctrl->admin_tagset); + if (IS_ERR(nctrl->fabrics_q)) { + rc = PTR_ERR(nctrl->fabrics_q); + nctrl->fabrics_q = NULL; + goto out_free_tagset; + } + + nctrl->admin_q = blk_mq_init_queue(nctrl->admin_tagset); + if (IS_ERR(nctrl->admin_q)) { + rc = PTR_ERR(nctrl->admin_q); + nctrl->admin_q = NULL; + goto out_cleanup_fabrics_q; + } + } + + /* Placeholder - nvme_tcp_ofld_start_queue */ + + rc = nvme_enable_ctrl(nctrl); + if (rc) + goto out_stop_queue; + + blk_mq_unquiesce_queue(nctrl->admin_q); + + rc = nvme_init_ctrl_finish(nctrl); + if (rc) + goto out_quiesce_queue; + + return 0; + +out_quiesce_queue: + blk_mq_quiesce_queue(nctrl->admin_q); + blk_sync_queue(nctrl->admin_q); + +out_stop_queue: + /* Placeholder - stop offload queue */ + nvme_cancel_admin_tagset(nctrl); + +out_cleanup_fabrics_q: + if (new) + blk_cleanup_queue(nctrl->fabrics_q); +out_free_tagset: + if (new) + blk_mq_free_tag_set(nctrl->admin_tagset); +out_destroy_queue: + /* Placeholder - free admin queue */ + + return rc; +} + +static int +nvme_tcp_ofld_configure_io_queues(struct nvme_ctrl *nctrl, bool new) +{ + int rc; + + /* Placeholder - alloc_io_queues */ + + if (new) { + nctrl->tagset = nvme_tcp_ofld_alloc_tagset(nctrl, false); + if (IS_ERR(nctrl->tagset)) { + rc = PTR_ERR(nctrl->tagset); + nctrl->tagset = NULL; + goto out_free_io_queues; + } + + nctrl->connect_q = blk_mq_init_queue(nctrl->tagset); + if (IS_ERR(nctrl->connect_q)) { + rc = PTR_ERR(nctrl->connect_q); + nctrl->connect_q = NULL; + goto out_free_tag_set; + } + } + + /* Placeholder - start_io_queues */ + + if (!new) { + nvme_start_queues(nctrl); + if (!nvme_wait_freeze_timeout(nctrl, NVME_IO_TIMEOUT)) { + /* + * If we timed out waiting for freeze we are likely to + * be stuck. Fail the controller initialization just + * to be safe. + */ + rc = -ENODEV; + goto out_wait_freeze_timed_out; + } + blk_mq_update_nr_hw_queues(nctrl->tagset, nctrl->queue_count - 1); + nvme_unfreeze(nctrl); + } + + return 0; + +out_wait_freeze_timed_out: + nvme_stop_queues(nctrl); + nvme_sync_io_queues(nctrl); + + /* Placeholder - Stop IO queues */ + + if (new) + blk_cleanup_queue(nctrl->connect_q); +out_free_tag_set: + if (new) + blk_mq_free_tag_set(nctrl->tagset); +out_free_io_queues: + /* Placeholder - free_io_queues */ + + return rc; +} + +static int nvme_tcp_ofld_setup_ctrl(struct nvme_ctrl *nctrl, bool new) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct nvmf_ctrl_options *opts = nctrl->opts; + int rc = 0; + + rc = ctrl->dev->ops->setup_ctrl(ctrl); + if (rc) + return rc; + + rc = nvme_tcp_ofld_configure_admin_queue(nctrl, new); + if (rc) + goto out_release_ctrl; + + if (nctrl->icdoff) { + dev_err(nctrl->device, "icdoff is not supported!\n"); + rc = -EINVAL; + goto destroy_admin; + } + + if (!(nctrl->sgls & ((1 << 0) | (1 << 1)))) { + dev_err(nctrl->device, "Mandatory sgls are not supported!\n"); + goto destroy_admin; + } + + if (opts->queue_size > nctrl->sqsize + 1) + dev_warn(nctrl->device, + "queue_size %zu > ctrl sqsize %u, clamping down\n", + opts->queue_size, nctrl->sqsize + 1); + + if (nctrl->sqsize + 1 > nctrl->maxcmd) { + dev_warn(nctrl->device, + "sqsize %u > ctrl maxcmd %u, clamping down\n", + nctrl->sqsize + 1, nctrl->maxcmd); + nctrl->sqsize = nctrl->maxcmd - 1; + } + + if (nctrl->queue_count > 1) { + rc = nvme_tcp_ofld_configure_io_queues(nctrl, new); + if (rc) + goto destroy_admin; + } + + if (!nvme_change_ctrl_state(nctrl, NVME_CTRL_LIVE)) { + /* + * state change failure is ok if we started ctrl delete, + * unless we're during creation of a new controller to + * avoid races with teardown flow. + */ + WARN_ON_ONCE(nctrl->state != NVME_CTRL_DELETING && + nctrl->state != NVME_CTRL_DELETING_NOIO); + WARN_ON_ONCE(new); + rc = -EINVAL; + goto destroy_io; + } + + nvme_start_ctrl(nctrl); + + return 0; + +destroy_io: + /* Placeholder - stop and destroy io queues*/ +destroy_admin: + /* Placeholder - stop and destroy admin queue*/ +out_release_ctrl: + ctrl->dev->ops->release_ctrl(ctrl); + + return rc; +} + +static int +nvme_tcp_ofld_check_dev_opts(struct nvmf_ctrl_options *opts, + struct nvme_tcp_ofld_ops *ofld_ops) +{ + unsigned int nvme_tcp_ofld_opt_mask = NVMF_ALLOWED_OPTS | + ofld_ops->allowed_opts | ofld_ops->required_opts; + struct nvmf_ctrl_options dev_opts_mask; + + if (opts->mask & ~nvme_tcp_ofld_opt_mask) { + pr_warn("One or more nvmf options missing from ofld drvr %s.\n", + ofld_ops->name); + + dev_opts_mask.mask = nvme_tcp_ofld_opt_mask; + + return nvmf_check_required_opts(&dev_opts_mask, opts->mask); + } + + return 0; +} + +static void nvme_tcp_ofld_free_ctrl(struct nvme_ctrl *nctrl) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct nvme_tcp_ofld_dev *dev = ctrl->dev; + + if (list_empty(&ctrl->list)) + goto free_ctrl; + + ctrl->dev->ops->release_ctrl(ctrl); + + mutex_lock(&nvme_tcp_ofld_ctrl_mutex); + list_del(&ctrl->list); + mutex_unlock(&nvme_tcp_ofld_ctrl_mutex); + + nvmf_free_options(nctrl->opts); +free_ctrl: + module_put(dev->ops->module); + kfree(ctrl->queues); + kfree(ctrl); +} + +static void +nvme_tcp_ofld_teardown_admin_queue(struct nvme_ctrl *ctrl, bool remove) +{ + /* Placeholder - teardown_admin_queue */ +} + +static void +nvme_tcp_ofld_teardown_io_queues(struct nvme_ctrl *nctrl, bool remove) +{ + /* Placeholder - teardown_io_queues */ +} + +static void +nvme_tcp_ofld_teardown_ctrl(struct nvme_ctrl *nctrl, bool shutdown) +{ + /* Placeholder - err_work and connect_work */ + nvme_tcp_ofld_teardown_io_queues(nctrl, shutdown); + blk_mq_quiesce_queue(nctrl->admin_q); + if (shutdown) + nvme_shutdown_ctrl(nctrl); + else + nvme_disable_ctrl(nctrl); + nvme_tcp_ofld_teardown_admin_queue(nctrl, shutdown); +} + +static void nvme_tcp_ofld_delete_ctrl(struct nvme_ctrl *nctrl) +{ + nvme_tcp_ofld_teardown_ctrl(nctrl, true); +} + +static int +nvme_tcp_ofld_init_request(struct blk_mq_tag_set *set, + struct request *rq, + unsigned int hctx_idx, + unsigned int numa_node) +{ + struct nvme_tcp_ofld_req *req = blk_mq_rq_to_pdu(rq); + + /* Placeholder - init request */ + + req->done = nvme_tcp_ofld_req_done; + + return 0; +} + +static blk_status_t +nvme_tcp_ofld_queue_rq(struct blk_mq_hw_ctx *hctx, + const struct blk_mq_queue_data *bd) +{ + /* Call nvme_setup_cmd(...) */ + + /* Call ops->send_req(...) */ + + return BLK_STS_OK; +} + +static struct blk_mq_ops nvme_tcp_ofld_mq_ops = { + .queue_rq = nvme_tcp_ofld_queue_rq, + .init_request = nvme_tcp_ofld_init_request, + /* + * All additional ops will be also implemented and registered similar to + * tcp.c + */ +}; + +static struct blk_mq_ops nvme_tcp_ofld_admin_mq_ops = { + .queue_rq = nvme_tcp_ofld_queue_rq, + .init_request = nvme_tcp_ofld_init_request, + /* + * All additional ops will be also implemented and registered similar to + * tcp.c + */ +}; + +static const struct nvme_ctrl_ops nvme_tcp_ofld_ctrl_ops = { + .name = "tcp_offload", + .module = THIS_MODULE, + .flags = NVME_F_FABRICS, + .reg_read32 = nvmf_reg_read32, + .reg_read64 = nvmf_reg_read64, + .reg_write32 = nvmf_reg_write32, + .free_ctrl = nvme_tcp_ofld_free_ctrl, + .delete_ctrl = nvme_tcp_ofld_delete_ctrl, + .get_address = nvmf_get_address, +}; + +static bool +nvme_tcp_ofld_existing_controller(struct nvmf_ctrl_options *opts) +{ + struct nvme_tcp_ofld_ctrl *ctrl; + bool found = false; + + mutex_lock(&nvme_tcp_ofld_ctrl_mutex); + list_for_each_entry(ctrl, &nvme_tcp_ofld_ctrl_list, list) { + found = nvmf_ip_options_match(&ctrl->nctrl, opts); + if (found) + break; + } + mutex_unlock(&nvme_tcp_ofld_ctrl_mutex); + + return found; +} + static struct nvme_ctrl * nvme_tcp_ofld_create_ctrl(struct device *ndev, struct nvmf_ctrl_options *opts) { + struct nvme_tcp_ofld_queue *queue; struct nvme_tcp_ofld_ctrl *ctrl; struct nvme_tcp_ofld_dev *dev; struct nvme_ctrl *nctrl; - int rc = 0; + int i, rc = 0; ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); if (!ctrl) return ERR_PTR(-ENOMEM); + INIT_LIST_HEAD(&ctrl->list); nctrl = &ctrl->nctrl; + nctrl->opts = opts; + nctrl->queue_count = opts->nr_io_queues + opts->nr_write_queues + + opts->nr_poll_queues + 1; + nctrl->sqsize = opts->queue_size - 1; + nctrl->kato = opts->kato; + if (!(opts->mask & NVMF_OPT_TRSVCID)) { + opts->trsvcid = + kstrdup(__stringify(NVME_TCP_DISC_PORT), GFP_KERNEL); + if (!opts->trsvcid) { + rc = -ENOMEM; + goto out_free_ctrl; + } + opts->mask |= NVMF_OPT_TRSVCID; + } + + rc = inet_pton_with_scope(&init_net, AF_UNSPEC, opts->traddr, + opts->trsvcid, + &ctrl->conn_params.remote_ip_addr); + if (rc) { + pr_err("malformed address passed: %s:%s\n", + opts->traddr, opts->trsvcid); + goto out_free_ctrl; + } + + if (opts->mask & NVMF_OPT_HOST_TRADDR) { + rc = inet_pton_with_scope(&init_net, AF_UNSPEC, + opts->host_traddr, NULL, + &ctrl->conn_params.local_ip_addr); + if (rc) { + pr_err("malformed src address passed: %s\n", + opts->host_traddr); + goto out_free_ctrl; + } + } - /* Init nvme_tcp_ofld_ctrl and nvme_ctrl params based on received opts */ + if (!opts->duplicate_connect && + nvme_tcp_ofld_existing_controller(opts)) { + rc = -EALREADY; + goto out_free_ctrl; + } /* Find device that can reach the dest addr */ dev = nvme_tcp_ofld_lookup_dev(ctrl); @@ -151,6 +573,10 @@ nvme_tcp_ofld_create_ctrl(struct device *ndev, struct nvmf_ctrl_options *opts) goto out_free_ctrl; } + rc = nvme_tcp_ofld_check_dev_opts(opts, dev->ops); + if (rc) + goto out_module_put; + ctrl->dev = dev; if (ctrl->dev->ops->max_hw_sectors) @@ -158,14 +584,51 @@ nvme_tcp_ofld_create_ctrl(struct device *ndev, struct nvmf_ctrl_options *opts) if (ctrl->dev->ops->max_segments) nctrl->max_segments = ctrl->dev->ops->max_segments; - /* Init queues */ + ctrl->queues = kcalloc(nctrl->queue_count, + sizeof(struct nvme_tcp_ofld_queue), + GFP_KERNEL); + if (!ctrl->queues) { + rc = -ENOMEM; + goto out_module_put; + } + + for (i = 0; i < nctrl->queue_count; ++i) { + queue = &ctrl->queues[i]; + queue->ctrl = ctrl; + queue->dev = dev; + queue->report_err = nvme_tcp_ofld_report_queue_err; + } + + rc = nvme_init_ctrl(nctrl, ndev, &nvme_tcp_ofld_ctrl_ops, 0); + if (rc) + goto out_free_queues; + + if (!nvme_change_ctrl_state(nctrl, NVME_CTRL_CONNECTING)) { + WARN_ON_ONCE(1); + rc = -EINTR; + goto out_uninit_ctrl; + } - /* Call nvme_init_ctrl */ + rc = nvme_tcp_ofld_setup_ctrl(nctrl, true); + if (rc) + goto out_uninit_ctrl; - /* Setup ctrl */ + dev_info(nctrl->device, "new ctrl: NQN \"%s\", addr %pISp\n", + opts->subsysnqn, &ctrl->conn_params.remote_ip_addr); + + mutex_lock(&nvme_tcp_ofld_ctrl_mutex); + list_add_tail(&ctrl->list, &nvme_tcp_ofld_ctrl_list); + mutex_unlock(&nvme_tcp_ofld_ctrl_mutex); return nctrl; +out_uninit_ctrl: + nvme_uninit_ctrl(nctrl); + nvme_put_ctrl(nctrl); +out_free_queues: + kfree(ctrl->queues); +out_module_put: + module_put(dev->ops->module); out_free_ctrl: kfree(ctrl); @@ -193,7 +656,15 @@ static int __init nvme_tcp_ofld_init_module(void) static void __exit nvme_tcp_ofld_cleanup_module(void) { + struct nvme_tcp_ofld_ctrl *ctrl; + nvmf_unregister_transport(&nvme_tcp_ofld_transport); + + mutex_lock(&nvme_tcp_ofld_ctrl_mutex); + list_for_each_entry(ctrl, &nvme_tcp_ofld_ctrl_list, list) + nvme_delete_ctrl(&ctrl->nctrl); + mutex_unlock(&nvme_tcp_ofld_ctrl_mutex); + flush_workqueue(nvme_delete_wq); } module_init(nvme_tcp_ofld_init_module); From patchwork Wed Jun 2 18:42:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shai Malin X-Patchwork-Id: 12295531 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8AA7C4708F for ; Wed, 2 Jun 2021 18:43:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCF6161287 for ; Wed, 2 Jun 2021 18:43:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229753AbhFBSpg (ORCPT ); Wed, 2 Jun 2021 14:45:36 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:59078 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229657AbhFBSpe (ORCPT ); Wed, 2 Jun 2021 14:45:34 -0400 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 152IeHZX013026; Wed, 2 Jun 2021 11:43:41 -0700 Received: from dc5-exch02.marvell.com ([199.233.59.182]) by mx0b-0016f401.pphosted.com with ESMTP id 38wufgv8m9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 02 Jun 2021 11:43:41 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 2 Jun 2021 11:43:39 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 11:43:35 -0700 From: Shai Malin To: , , , , CC: , , , , , , , , , , Arie Gershberg Subject: [PATCH 6/8] nvme-tcp-offload: Add controller level error recovery implementation Date: Wed, 2 Jun 2021 21:42:44 +0300 Message-ID: <20210602184246.14184-7-smalin@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210602184246.14184-1-smalin@marvell.com> References: <20210602184246.14184-1-smalin@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: bs2wJ2hgzNnfUHKXo8m4khbI9zyw7OjL X-Proofpoint-GUID: bs2wJ2hgzNnfUHKXo8m4khbI9zyw7OjL X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-02_10:2021-06-02,2021-06-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Arie Gershberg In this patch, we implement controller level error handling and recovery. Upon an error discovered by the ULP or reset controller initiated by the nvme-core (using reset_ctrl workqueue), the ULP will initiate a controller recovery which includes teardown and re-connect of all queues. Acked-by: Igor Russkikh Signed-off-by: Arie Gershberg Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Hannes Reinecke Reviewed-by: Himanshu Madhani --- drivers/nvme/host/tcp-offload.c | 127 +++++++++++++++++++++++++++++++- drivers/nvme/host/tcp-offload.h | 1 + 2 files changed, 126 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/host/tcp-offload.c b/drivers/nvme/host/tcp-offload.c index d05dec9c0add..97c1fd33adb9 100644 --- a/drivers/nvme/host/tcp-offload.c +++ b/drivers/nvme/host/tcp-offload.c @@ -72,6 +72,23 @@ void nvme_tcp_ofld_unregister_dev(struct nvme_tcp_ofld_dev *dev) } EXPORT_SYMBOL_GPL(nvme_tcp_ofld_unregister_dev); +/** + * nvme_tcp_ofld_error_recovery() - NVMeTCP Offload library error recovery. + * function. + * @nctrl: NVMe controller instance to change to resetting. + * + * API function that change the controller state to resseting. + * Part of the overall controller reset sequence. + */ +void nvme_tcp_ofld_error_recovery(struct nvme_ctrl *nctrl) +{ + if (!nvme_change_ctrl_state(nctrl, NVME_CTRL_RESETTING)) + return; + + queue_work(nvme_reset_wq, &to_tcp_ofld_ctrl(nctrl)->err_work); +} +EXPORT_SYMBOL_GPL(nvme_tcp_ofld_error_recovery); + /** * nvme_tcp_ofld_report_queue_err() - NVMeTCP Offload report error event * callback function. Pointed to by nvme_tcp_ofld_queue->report_err. @@ -82,7 +99,8 @@ EXPORT_SYMBOL_GPL(nvme_tcp_ofld_unregister_dev); */ int nvme_tcp_ofld_report_queue_err(struct nvme_tcp_ofld_queue *queue) { - /* Placeholder - invoke error recovery flow */ + pr_err("nvme-tcp-offload queue error\n"); + nvme_tcp_ofld_error_recovery(&queue->ctrl->nctrl); return 0; } @@ -287,6 +305,28 @@ nvme_tcp_ofld_configure_io_queues(struct nvme_ctrl *nctrl, bool new) return rc; } +static void nvme_tcp_ofld_reconnect_or_remove(struct nvme_ctrl *nctrl) +{ + /* If we are resetting/deleting then do nothing */ + if (nctrl->state != NVME_CTRL_CONNECTING) { + WARN_ON_ONCE(nctrl->state == NVME_CTRL_NEW || + nctrl->state == NVME_CTRL_LIVE); + + return; + } + + if (nvmf_should_reconnect(nctrl)) { + dev_info(nctrl->device, "Reconnecting in %d seconds...\n", + nctrl->opts->reconnect_delay); + queue_delayed_work(nvme_wq, + &to_tcp_ofld_ctrl(nctrl)->connect_work, + nctrl->opts->reconnect_delay * HZ); + } else { + dev_info(nctrl->device, "Removing controller...\n"); + nvme_delete_ctrl(nctrl); + } +} + static int nvme_tcp_ofld_setup_ctrl(struct nvme_ctrl *nctrl, bool new) { struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); @@ -410,10 +450,63 @@ nvme_tcp_ofld_teardown_io_queues(struct nvme_ctrl *nctrl, bool remove) /* Placeholder - teardown_io_queues */ } +static void nvme_tcp_ofld_reconnect_ctrl_work(struct work_struct *work) +{ + struct nvme_tcp_ofld_ctrl *ctrl = + container_of(to_delayed_work(work), + struct nvme_tcp_ofld_ctrl, + connect_work); + struct nvme_ctrl *nctrl = &ctrl->nctrl; + + ++nctrl->nr_reconnects; + + if (nvme_tcp_ofld_setup_ctrl(nctrl, false)) + goto requeue; + + dev_info(nctrl->device, "Successfully reconnected (%d attempt)\n", + nctrl->nr_reconnects); + + nctrl->nr_reconnects = 0; + + return; + +requeue: + dev_info(nctrl->device, "Failed reconnect attempt %d\n", + nctrl->nr_reconnects); + nvme_tcp_ofld_reconnect_or_remove(nctrl); +} + +static void nvme_tcp_ofld_error_recovery_work(struct work_struct *work) +{ + struct nvme_tcp_ofld_ctrl *ctrl = + container_of(work, struct nvme_tcp_ofld_ctrl, err_work); + struct nvme_ctrl *nctrl = &ctrl->nctrl; + + nvme_stop_keep_alive(nctrl); + nvme_tcp_ofld_teardown_io_queues(nctrl, false); + /* unquiesce to fail fast pending requests */ + nvme_start_queues(nctrl); + nvme_tcp_ofld_teardown_admin_queue(nctrl, false); + blk_mq_unquiesce_queue(nctrl->admin_q); + + if (!nvme_change_ctrl_state(nctrl, NVME_CTRL_CONNECTING)) { + /* state change failure is ok if we started nctrl delete */ + WARN_ON_ONCE(nctrl->state != NVME_CTRL_DELETING && + nctrl->state != NVME_CTRL_DELETING_NOIO); + + return; + } + + nvme_tcp_ofld_reconnect_or_remove(nctrl); +} + static void nvme_tcp_ofld_teardown_ctrl(struct nvme_ctrl *nctrl, bool shutdown) { - /* Placeholder - err_work and connect_work */ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + + cancel_work_sync(&ctrl->err_work); + cancel_delayed_work_sync(&ctrl->connect_work); nvme_tcp_ofld_teardown_io_queues(nctrl, shutdown); blk_mq_quiesce_queue(nctrl->admin_q); if (shutdown) @@ -428,6 +521,32 @@ static void nvme_tcp_ofld_delete_ctrl(struct nvme_ctrl *nctrl) nvme_tcp_ofld_teardown_ctrl(nctrl, true); } +static void nvme_tcp_ofld_reset_ctrl_work(struct work_struct *work) +{ + struct nvme_ctrl *nctrl = + container_of(work, struct nvme_ctrl, reset_work); + + nvme_stop_ctrl(nctrl); + nvme_tcp_ofld_teardown_ctrl(nctrl, false); + + if (!nvme_change_ctrl_state(nctrl, NVME_CTRL_CONNECTING)) { + /* state change failure is ok if we started ctrl delete */ + WARN_ON_ONCE(nctrl->state != NVME_CTRL_DELETING && + nctrl->state != NVME_CTRL_DELETING_NOIO); + + return; + } + + if (nvme_tcp_ofld_setup_ctrl(nctrl, false)) + goto out_fail; + + return; + +out_fail: + ++nctrl->nr_reconnects; + nvme_tcp_ofld_reconnect_or_remove(nctrl); +} + static int nvme_tcp_ofld_init_request(struct blk_mq_tag_set *set, struct request *rq, @@ -521,6 +640,10 @@ nvme_tcp_ofld_create_ctrl(struct device *ndev, struct nvmf_ctrl_options *opts) opts->nr_poll_queues + 1; nctrl->sqsize = opts->queue_size - 1; nctrl->kato = opts->kato; + INIT_DELAYED_WORK(&ctrl->connect_work, + nvme_tcp_ofld_reconnect_ctrl_work); + INIT_WORK(&ctrl->err_work, nvme_tcp_ofld_error_recovery_work); + INIT_WORK(&nctrl->reset_work, nvme_tcp_ofld_reset_ctrl_work); if (!(opts->mask & NVMF_OPT_TRSVCID)) { opts->trsvcid = kstrdup(__stringify(NVME_TCP_DISC_PORT), GFP_KERNEL); diff --git a/drivers/nvme/host/tcp-offload.h b/drivers/nvme/host/tcp-offload.h index 520a0ea6f4b8..4281d1dacc94 100644 --- a/drivers/nvme/host/tcp-offload.h +++ b/drivers/nvme/host/tcp-offload.h @@ -197,3 +197,4 @@ struct nvme_tcp_ofld_ops { /* Exported functions for lower vendor specific offload drivers */ int nvme_tcp_ofld_register_dev(struct nvme_tcp_ofld_dev *dev); void nvme_tcp_ofld_unregister_dev(struct nvme_tcp_ofld_dev *dev); +void nvme_tcp_ofld_error_recovery(struct nvme_ctrl *nctrl); From patchwork Wed Jun 2 18:42:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shai Malin X-Patchwork-Id: 12295539 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 28946C4708F for ; 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Wed, 2 Jun 2021 11:43:43 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 11:43:39 -0700 From: Shai Malin To: , , , , CC: , , , , , , , , , , Dean Balandin Subject: [PATCH 7/8] nvme-tcp-offload: Add queue level implementation Date: Wed, 2 Jun 2021 21:42:45 +0300 Message-ID: <20210602184246.14184-8-smalin@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210602184246.14184-1-smalin@marvell.com> References: <20210602184246.14184-1-smalin@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: f6ZxH9yMdTlTBvpAW9TprG-ZLmv8H2TZ X-Proofpoint-GUID: f6ZxH9yMdTlTBvpAW9TprG-ZLmv8H2TZ X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-02_10:2021-06-02,2021-06-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Dean Balandin In this patch we implement queue level functionality. The implementation is similar to the nvme-tcp module, the main difference being that we call the vendor specific create_queue op which creates the TCP connection, and NVMeTPC connection including icreq+icresp negotiation. Once create_queue returns successfully, we can move on to the fabrics connect. Acked-by: Igor Russkikh Signed-off-by: Dean Balandin Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Himanshu Madhani Reviewed-by: Hannes Reinecke --- drivers/nvme/host/tcp-offload.c | 417 +++++++++++++++++++++++++++++--- drivers/nvme/host/tcp-offload.h | 4 + 2 files changed, 393 insertions(+), 28 deletions(-) diff --git a/drivers/nvme/host/tcp-offload.c b/drivers/nvme/host/tcp-offload.c index 97c1fd33adb9..1700cdf42433 100644 --- a/drivers/nvme/host/tcp-offload.c +++ b/drivers/nvme/host/tcp-offload.c @@ -22,6 +22,11 @@ static inline struct nvme_tcp_ofld_ctrl *to_tcp_ofld_ctrl(struct nvme_ctrl *nctr return container_of(nctrl, struct nvme_tcp_ofld_ctrl, nctrl); } +static inline int nvme_tcp_ofld_qid(struct nvme_tcp_ofld_queue *queue) +{ + return queue - queue->ctrl->queues; +} + /** * nvme_tcp_ofld_register_dev() - NVMeTCP Offload Library registration * function. @@ -182,19 +187,124 @@ nvme_tcp_ofld_alloc_tagset(struct nvme_ctrl *nctrl, bool admin) return set; } +static void __nvme_tcp_ofld_stop_queue(struct nvme_tcp_ofld_queue *queue) +{ + queue->dev->ops->drain_queue(queue); +} + +static void nvme_tcp_ofld_stop_queue(struct nvme_ctrl *nctrl, int qid) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct nvme_tcp_ofld_queue *queue = &ctrl->queues[qid]; + + mutex_lock(&queue->queue_lock); + if (test_and_clear_bit(NVME_TCP_OFLD_Q_LIVE, &queue->flags)) + __nvme_tcp_ofld_stop_queue(queue); + mutex_unlock(&queue->queue_lock); +} + +static void nvme_tcp_ofld_stop_io_queues(struct nvme_ctrl *ctrl) +{ + int i; + + for (i = 1; i < ctrl->queue_count; i++) + nvme_tcp_ofld_stop_queue(ctrl, i); +} + +static void __nvme_tcp_ofld_free_queue(struct nvme_tcp_ofld_queue *queue) +{ + queue->dev->ops->destroy_queue(queue); +} + +static void nvme_tcp_ofld_free_queue(struct nvme_ctrl *nctrl, int qid) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct nvme_tcp_ofld_queue *queue = &ctrl->queues[qid]; + + if (test_and_clear_bit(NVME_TCP_OFLD_Q_ALLOCATED, &queue->flags)) { + __nvme_tcp_ofld_free_queue(queue); + mutex_destroy(&queue->queue_lock); + } +} + +static void +nvme_tcp_ofld_free_io_queues(struct nvme_ctrl *nctrl) +{ + int i; + + for (i = 1; i < nctrl->queue_count; i++) + nvme_tcp_ofld_free_queue(nctrl, i); +} + +static void nvme_tcp_ofld_destroy_io_queues(struct nvme_ctrl *nctrl, bool remove) +{ + nvme_tcp_ofld_stop_io_queues(nctrl); + if (remove) { + blk_cleanup_queue(nctrl->connect_q); + blk_mq_free_tag_set(nctrl->tagset); + } + nvme_tcp_ofld_free_io_queues(nctrl); +} + +static void nvme_tcp_ofld_destroy_admin_queue(struct nvme_ctrl *nctrl, bool remove) +{ + nvme_tcp_ofld_stop_queue(nctrl, 0); + if (remove) { + blk_cleanup_queue(nctrl->admin_q); + blk_cleanup_queue(nctrl->fabrics_q); + blk_mq_free_tag_set(nctrl->admin_tagset); + } + nvme_tcp_ofld_free_queue(nctrl, 0); +} + +static int nvme_tcp_ofld_start_queue(struct nvme_ctrl *nctrl, int qid) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct nvme_tcp_ofld_queue *queue = &ctrl->queues[qid]; + int rc; + + queue = &ctrl->queues[qid]; + if (qid) { + queue->cmnd_capsule_len = nctrl->ioccsz * 16; + rc = nvmf_connect_io_queue(nctrl, qid, false); + } else { + queue->cmnd_capsule_len = sizeof(struct nvme_command) + NVME_TCP_ADMIN_CCSZ; + rc = nvmf_connect_admin_queue(nctrl); + } + + if (!rc) { + set_bit(NVME_TCP_OFLD_Q_LIVE, &queue->flags); + } else { + if (test_bit(NVME_TCP_OFLD_Q_ALLOCATED, &queue->flags)) + __nvme_tcp_ofld_stop_queue(queue); + dev_err(nctrl->device, + "failed to connect queue: %d ret=%d\n", qid, rc); + } + + return rc; +} + static int nvme_tcp_ofld_configure_admin_queue(struct nvme_ctrl *nctrl, bool new) { + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct nvme_tcp_ofld_queue *queue = &ctrl->queues[0]; int rc; - /* Placeholder - alloc_admin_queue */ + mutex_init(&queue->queue_lock); + + rc = ctrl->dev->ops->create_queue(queue, 0, NVME_AQ_DEPTH); + if (rc) + return rc; + + set_bit(NVME_TCP_OFLD_Q_ALLOCATED, &queue->flags); if (new) { nctrl->admin_tagset = nvme_tcp_ofld_alloc_tagset(nctrl, true); if (IS_ERR(nctrl->admin_tagset)) { rc = PTR_ERR(nctrl->admin_tagset); nctrl->admin_tagset = NULL; - goto out_destroy_queue; + goto out_free_queue; } nctrl->fabrics_q = blk_mq_init_queue(nctrl->admin_tagset); @@ -212,7 +322,9 @@ static int nvme_tcp_ofld_configure_admin_queue(struct nvme_ctrl *nctrl, } } - /* Placeholder - nvme_tcp_ofld_start_queue */ + rc = nvme_tcp_ofld_start_queue(nctrl, 0); + if (rc) + goto out_cleanup_queue; rc = nvme_enable_ctrl(nctrl); if (rc) @@ -229,19 +341,143 @@ static int nvme_tcp_ofld_configure_admin_queue(struct nvme_ctrl *nctrl, out_quiesce_queue: blk_mq_quiesce_queue(nctrl->admin_q); blk_sync_queue(nctrl->admin_q); - out_stop_queue: - /* Placeholder - stop offload queue */ + nvme_tcp_ofld_stop_queue(nctrl, 0); nvme_cancel_admin_tagset(nctrl); - +out_cleanup_queue: + if (new) + blk_cleanup_queue(nctrl->admin_q); out_cleanup_fabrics_q: if (new) blk_cleanup_queue(nctrl->fabrics_q); out_free_tagset: if (new) blk_mq_free_tag_set(nctrl->admin_tagset); -out_destroy_queue: - /* Placeholder - free admin queue */ +out_free_queue: + nvme_tcp_ofld_free_queue(nctrl, 0); + + return rc; +} + +static unsigned int nvme_tcp_ofld_nr_io_queues(struct nvme_ctrl *nctrl) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct nvme_tcp_ofld_dev *dev = ctrl->dev; + u32 hw_vectors = dev->num_hw_vectors; + u32 nr_write_queues, nr_poll_queues; + u32 nr_io_queues, nr_total_queues; + + nr_io_queues = min3(nctrl->opts->nr_io_queues, num_online_cpus(), + hw_vectors); + nr_write_queues = min3(nctrl->opts->nr_write_queues, num_online_cpus(), + hw_vectors); + nr_poll_queues = min3(nctrl->opts->nr_poll_queues, num_online_cpus(), + hw_vectors); + + nr_total_queues = nr_io_queues + nr_write_queues + nr_poll_queues; + + return nr_total_queues; +} + +static void +nvme_tcp_ofld_set_io_queues(struct nvme_ctrl *nctrl, unsigned int nr_io_queues) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + struct nvmf_ctrl_options *opts = nctrl->opts; + + if (opts->nr_write_queues && opts->nr_io_queues < nr_io_queues) { + /* + * separate read/write queues + * hand out dedicated default queues only after we have + * sufficient read queues. + */ + ctrl->io_queues[HCTX_TYPE_READ] = opts->nr_io_queues; + nr_io_queues -= ctrl->io_queues[HCTX_TYPE_READ]; + ctrl->io_queues[HCTX_TYPE_DEFAULT] = + min(opts->nr_write_queues, nr_io_queues); + nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; + } else { + /* + * shared read/write queues + * either no write queues were requested, or we don't have + * sufficient queue count to have dedicated default queues. + */ + ctrl->io_queues[HCTX_TYPE_DEFAULT] = + min(opts->nr_io_queues, nr_io_queues); + nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; + } + + if (opts->nr_poll_queues && nr_io_queues) { + /* map dedicated poll queues only if we have queues left */ + ctrl->io_queues[HCTX_TYPE_POLL] = + min(opts->nr_poll_queues, nr_io_queues); + } +} + +static int nvme_tcp_ofld_create_io_queues(struct nvme_ctrl *nctrl) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); + int i, rc; + + for (i = 1; i < nctrl->queue_count; i++) { + mutex_init(&ctrl->queues[i].queue_lock); + + rc = ctrl->dev->ops->create_queue(&ctrl->queues[i], + i, nctrl->sqsize + 1); + if (rc) + goto out_free_queues; + + set_bit(NVME_TCP_OFLD_Q_ALLOCATED, &ctrl->queues[i].flags); + } + + return 0; + +out_free_queues: + for (i--; i >= 1; i--) + nvme_tcp_ofld_free_queue(nctrl, i); + + return rc; +} + +static int nvme_tcp_ofld_alloc_io_queues(struct nvme_ctrl *nctrl) +{ + unsigned int nr_io_queues; + int rc; + + nr_io_queues = nvme_tcp_ofld_nr_io_queues(nctrl); + rc = nvme_set_queue_count(nctrl, &nr_io_queues); + if (rc) + return rc; + + nctrl->queue_count = nr_io_queues + 1; + if (nctrl->queue_count < 2) { + dev_err(nctrl->device, + "unable to set any I/O queues\n"); + + return -ENOMEM; + } + + dev_info(nctrl->device, "creating %d I/O queues.\n", nr_io_queues); + nvme_tcp_ofld_set_io_queues(nctrl, nr_io_queues); + + return nvme_tcp_ofld_create_io_queues(nctrl); +} + +static int nvme_tcp_ofld_start_io_queues(struct nvme_ctrl *nctrl) +{ + int i, rc = 0; + + for (i = 1; i < nctrl->queue_count; i++) { + rc = nvme_tcp_ofld_start_queue(nctrl, i); + if (rc) + goto out_stop_queues; + } + + return 0; + +out_stop_queues: + for (i--; i >= 1; i--) + nvme_tcp_ofld_stop_queue(nctrl, i); return rc; } @@ -249,9 +485,10 @@ static int nvme_tcp_ofld_configure_admin_queue(struct nvme_ctrl *nctrl, static int nvme_tcp_ofld_configure_io_queues(struct nvme_ctrl *nctrl, bool new) { - int rc; + int rc = nvme_tcp_ofld_alloc_io_queues(nctrl); - /* Placeholder - alloc_io_queues */ + if (rc) + return rc; if (new) { nctrl->tagset = nvme_tcp_ofld_alloc_tagset(nctrl, false); @@ -269,7 +506,9 @@ nvme_tcp_ofld_configure_io_queues(struct nvme_ctrl *nctrl, bool new) } } - /* Placeholder - start_io_queues */ + rc = nvme_tcp_ofld_start_io_queues(nctrl); + if (rc) + goto out_cleanup_connect_q; if (!new) { nvme_start_queues(nctrl); @@ -291,16 +530,16 @@ nvme_tcp_ofld_configure_io_queues(struct nvme_ctrl *nctrl, bool new) out_wait_freeze_timed_out: nvme_stop_queues(nctrl); nvme_sync_io_queues(nctrl); - - /* Placeholder - Stop IO queues */ - + nvme_tcp_ofld_stop_io_queues(nctrl); +out_cleanup_connect_q: + nvme_cancel_tagset(nctrl); if (new) blk_cleanup_queue(nctrl->connect_q); out_free_tag_set: if (new) blk_mq_free_tag_set(nctrl->tagset); out_free_io_queues: - /* Placeholder - free_io_queues */ + nvme_tcp_ofld_free_io_queues(nctrl); return rc; } @@ -327,6 +566,17 @@ static void nvme_tcp_ofld_reconnect_or_remove(struct nvme_ctrl *nctrl) } } +static int +nvme_tcp_ofld_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, + unsigned int hctx_idx) +{ + struct nvme_tcp_ofld_ctrl *ctrl = data; + + hctx->driver_data = &ctrl->queues[0]; + + return 0; +} + static int nvme_tcp_ofld_setup_ctrl(struct nvme_ctrl *nctrl, bool new) { struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(nctrl); @@ -388,9 +638,19 @@ static int nvme_tcp_ofld_setup_ctrl(struct nvme_ctrl *nctrl, bool new) return 0; destroy_io: - /* Placeholder - stop and destroy io queues*/ + if (nctrl->queue_count > 1) { + nvme_stop_queues(nctrl); + nvme_sync_io_queues(nctrl); + nvme_tcp_ofld_stop_io_queues(nctrl); + nvme_cancel_tagset(nctrl); + nvme_tcp_ofld_destroy_io_queues(nctrl, new); + } destroy_admin: - /* Placeholder - stop and destroy admin queue*/ + blk_mq_quiesce_queue(nctrl->admin_q); + blk_sync_queue(nctrl->admin_q); + nvme_tcp_ofld_stop_queue(nctrl, 0); + nvme_cancel_admin_tagset(nctrl); + nvme_tcp_ofld_destroy_admin_queue(nctrl, new); out_release_ctrl: ctrl->dev->ops->release_ctrl(ctrl); @@ -439,15 +699,37 @@ static void nvme_tcp_ofld_free_ctrl(struct nvme_ctrl *nctrl) } static void -nvme_tcp_ofld_teardown_admin_queue(struct nvme_ctrl *ctrl, bool remove) +nvme_tcp_ofld_teardown_admin_queue(struct nvme_ctrl *nctrl, bool remove) { - /* Placeholder - teardown_admin_queue */ + blk_mq_quiesce_queue(nctrl->admin_q); + blk_sync_queue(nctrl->admin_q); + + nvme_tcp_ofld_stop_queue(nctrl, 0); + nvme_cancel_admin_tagset(nctrl); + + if (remove) + blk_mq_unquiesce_queue(nctrl->admin_q); + + nvme_tcp_ofld_destroy_admin_queue(nctrl, remove); } static void nvme_tcp_ofld_teardown_io_queues(struct nvme_ctrl *nctrl, bool remove) { - /* Placeholder - teardown_io_queues */ + if (nctrl->queue_count <= 1) + return; + + blk_mq_quiesce_queue(nctrl->admin_q); + nvme_start_freeze(nctrl); + nvme_stop_queues(nctrl); + nvme_sync_io_queues(nctrl); + nvme_tcp_ofld_stop_io_queues(nctrl); + nvme_cancel_tagset(nctrl); + + if (remove) + nvme_start_queues(nctrl); + + nvme_tcp_ofld_destroy_io_queues(nctrl, remove); } static void nvme_tcp_ofld_reconnect_ctrl_work(struct work_struct *work) @@ -562,6 +844,12 @@ nvme_tcp_ofld_init_request(struct blk_mq_tag_set *set, return 0; } +inline size_t nvme_tcp_ofld_inline_data_size(struct nvme_tcp_ofld_queue *queue) +{ + return queue->cmnd_capsule_len - sizeof(struct nvme_command); +} +EXPORT_SYMBOL_GPL(nvme_tcp_ofld_inline_data_size); + static blk_status_t nvme_tcp_ofld_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) @@ -573,22 +861,95 @@ nvme_tcp_ofld_queue_rq(struct blk_mq_hw_ctx *hctx, return BLK_STS_OK; } +static void +nvme_tcp_ofld_exit_request(struct blk_mq_tag_set *set, + struct request *rq, unsigned int hctx_idx) +{ + /* + * Nothing is allocated in nvme_tcp_ofld_init_request, + * hence empty. + */ +} + +static int +nvme_tcp_ofld_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, + unsigned int hctx_idx) +{ + struct nvme_tcp_ofld_ctrl *ctrl = data; + + hctx->driver_data = &ctrl->queues[hctx_idx + 1]; + + return 0; +} + +static int nvme_tcp_ofld_map_queues(struct blk_mq_tag_set *set) +{ + struct nvme_tcp_ofld_ctrl *ctrl = set->driver_data; + struct nvmf_ctrl_options *opts = ctrl->nctrl.opts; + + if (opts->nr_write_queues && ctrl->io_queues[HCTX_TYPE_READ]) { + /* separate read/write queues */ + set->map[HCTX_TYPE_DEFAULT].nr_queues = + ctrl->io_queues[HCTX_TYPE_DEFAULT]; + set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; + set->map[HCTX_TYPE_READ].nr_queues = + ctrl->io_queues[HCTX_TYPE_READ]; + set->map[HCTX_TYPE_READ].queue_offset = + ctrl->io_queues[HCTX_TYPE_DEFAULT]; + } else { + /* shared read/write queues */ + set->map[HCTX_TYPE_DEFAULT].nr_queues = + ctrl->io_queues[HCTX_TYPE_DEFAULT]; + set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; + set->map[HCTX_TYPE_READ].nr_queues = + ctrl->io_queues[HCTX_TYPE_DEFAULT]; + set->map[HCTX_TYPE_READ].queue_offset = 0; + } + blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]); + blk_mq_map_queues(&set->map[HCTX_TYPE_READ]); + + if (opts->nr_poll_queues && ctrl->io_queues[HCTX_TYPE_POLL]) { + /* map dedicated poll queues only if we have queues left */ + set->map[HCTX_TYPE_POLL].nr_queues = + ctrl->io_queues[HCTX_TYPE_POLL]; + set->map[HCTX_TYPE_POLL].queue_offset = + ctrl->io_queues[HCTX_TYPE_DEFAULT] + + ctrl->io_queues[HCTX_TYPE_READ]; + blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]); + } + + dev_info(ctrl->nctrl.device, + "mapped %d/%d/%d default/read/poll queues.\n", + ctrl->io_queues[HCTX_TYPE_DEFAULT], + ctrl->io_queues[HCTX_TYPE_READ], + ctrl->io_queues[HCTX_TYPE_POLL]); + + return 0; +} + +static int nvme_tcp_ofld_poll(struct blk_mq_hw_ctx *hctx) +{ + /* Placeholder - Implement polling mechanism */ + + return 0; +} + static struct blk_mq_ops nvme_tcp_ofld_mq_ops = { .queue_rq = nvme_tcp_ofld_queue_rq, + .complete = nvme_complete_rq, .init_request = nvme_tcp_ofld_init_request, - /* - * All additional ops will be also implemented and registered similar to - * tcp.c - */ + .exit_request = nvme_tcp_ofld_exit_request, + .init_hctx = nvme_tcp_ofld_init_hctx, + .map_queues = nvme_tcp_ofld_map_queues, + .poll = nvme_tcp_ofld_poll, }; static struct blk_mq_ops nvme_tcp_ofld_admin_mq_ops = { .queue_rq = nvme_tcp_ofld_queue_rq, + .complete = nvme_complete_rq, .init_request = nvme_tcp_ofld_init_request, - /* - * All additional ops will be also implemented and registered similar to - * tcp.c - */ + .exit_request = nvme_tcp_ofld_exit_request, + .init_hctx = nvme_tcp_ofld_init_admin_hctx, }; static const struct nvme_ctrl_ops nvme_tcp_ofld_ctrl_ops = { diff --git a/drivers/nvme/host/tcp-offload.h b/drivers/nvme/host/tcp-offload.h index 4281d1dacc94..875fcd3ec04a 100644 --- a/drivers/nvme/host/tcp-offload.h +++ b/drivers/nvme/host/tcp-offload.h @@ -65,6 +65,9 @@ struct nvme_tcp_ofld_queue { unsigned long flags; size_t cmnd_capsule_len; + /* mutex used during stop_queue */ + struct mutex queue_lock; + u8 hdr_digest; u8 data_digest; u8 tos; @@ -198,3 +201,4 @@ struct nvme_tcp_ofld_ops { int nvme_tcp_ofld_register_dev(struct nvme_tcp_ofld_dev *dev); void nvme_tcp_ofld_unregister_dev(struct nvme_tcp_ofld_dev *dev); void nvme_tcp_ofld_error_recovery(struct nvme_ctrl *nctrl); +inline size_t nvme_tcp_ofld_inline_data_size(struct nvme_tcp_ofld_queue *queue); From patchwork Wed Jun 2 18:42:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shai Malin X-Patchwork-Id: 12295533 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C4A0C4708F for ; Wed, 2 Jun 2021 18:44:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 163D361359 for ; Wed, 2 Jun 2021 18:44:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229719AbhFBSpp (ORCPT ); Wed, 2 Jun 2021 14:45:45 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:37508 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229755AbhFBSpn (ORCPT ); Wed, 2 Jun 2021 14:45:43 -0400 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 152IeD0N012998; Wed, 2 Jun 2021 11:43:51 -0700 Received: from dc5-exch02.marvell.com ([199.233.59.182]) by mx0b-0016f401.pphosted.com with ESMTP id 38wufgv8n0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 02 Jun 2021 11:43:50 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 2 Jun 2021 11:43:49 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 11:43:44 -0700 From: Shai Malin To: , , , , CC: , , , , , , , , , , Dean Balandin Subject: [PATCH 8/8] nvme-tcp-offload: Add IO level implementation Date: Wed, 2 Jun 2021 21:42:46 +0300 Message-ID: <20210602184246.14184-9-smalin@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210602184246.14184-1-smalin@marvell.com> References: <20210602184246.14184-1-smalin@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: 2ZX_qaB_MwXD45Snt0ympBZWSfXtYjae X-Proofpoint-GUID: 2ZX_qaB_MwXD45Snt0ympBZWSfXtYjae X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-02_10:2021-06-02,2021-06-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Dean Balandin In this patch, we present the IO level functionality. The nvme-tcp-offload shall work on the IO-level, meaning the nvme-tcp-offload ULP module shall pass the request to the nvme-tcp-offload vendor driver and shall expect for the request completion. No additional handling is needed in between, this design will reduce the CPU utilization as we will describe below. The nvme-tcp-offload vendor driver shall register to nvme-tcp-offload ULP with the following IO-path ops: - send_req - in order to pass the request to the handling of the offload driver that shall pass it to the vendor specific device - poll_queue The vendor driver will manage the context from which the request will be executed and the request aggregations. Once the IO completed, the nvme-tcp-offload vendor driver shall call command.done() that shall invoke the nvme-tcp-offload ULP layer for completing the request. This patch also add support for the nvme-tcp-offload timeout and nvme-tcp-offload ASYNC flow. Acked-by: Igor Russkikh Signed-off-by: Dean Balandin Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Hannes Reinecke Reviewed-by: Himanshu Madhani --- drivers/nvme/host/tcp-offload.c | 176 ++++++++++++++++++++++++++++++-- drivers/nvme/host/tcp-offload.h | 2 + 2 files changed, 171 insertions(+), 7 deletions(-) diff --git a/drivers/nvme/host/tcp-offload.c b/drivers/nvme/host/tcp-offload.c index 1700cdf42433..c76822e5ada7 100644 --- a/drivers/nvme/host/tcp-offload.c +++ b/drivers/nvme/host/tcp-offload.c @@ -125,7 +125,30 @@ void nvme_tcp_ofld_req_done(struct nvme_tcp_ofld_req *req, union nvme_result *result, __le16 status) { - /* Placeholder - complete request with/without error */ + struct request *rq = blk_mq_rq_from_pdu(req); + + if (!nvme_try_complete_req(rq, cpu_to_le16(status << 1), *result)) + nvme_complete_rq(rq); +} + +/** + * nvme_tcp_ofld_async_req_done() - NVMeTCP Offload request done callback + * function for async request. Pointed to by nvme_tcp_ofld_req->done. + * Handles both NVME_TCP_F_DATA_SUCCESS flag and NVMe CQ. + * @req: NVMeTCP offload request to complete. + * @result: The nvme_result. + * @status: The completion status. + * + * API function that allows the vendor specific offload driver to report request + * completions to the common offload layer. + */ +void nvme_tcp_ofld_async_req_done(struct nvme_tcp_ofld_req *req, + union nvme_result *result, __le16 status) +{ + struct nvme_tcp_ofld_queue *queue = req->queue; + struct nvme_tcp_ofld_ctrl *ctrl = queue->ctrl; + + nvme_complete_async_event(&ctrl->nctrl, status, result); } static struct nvme_tcp_ofld_dev * @@ -698,6 +721,54 @@ static void nvme_tcp_ofld_free_ctrl(struct nvme_ctrl *nctrl) kfree(ctrl); } +static void nvme_tcp_ofld_set_sg_null(struct nvme_command *c) +{ + struct nvme_sgl_desc *sg = &c->common.dptr.sgl; + + sg->addr = 0; + sg->length = 0; + sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | NVME_SGL_FMT_TRANSPORT_A; +} + +inline void nvme_tcp_ofld_set_sg_inline(struct nvme_tcp_ofld_queue *queue, + struct nvme_command *c, u32 data_len) +{ + struct nvme_sgl_desc *sg = &c->common.dptr.sgl; + + sg->addr = cpu_to_le64(queue->ctrl->nctrl.icdoff); + sg->length = cpu_to_le32(data_len); + sg->type = (NVME_SGL_FMT_DATA_DESC << 4) | NVME_SGL_FMT_OFFSET; +} + +static void nvme_tcp_ofld_map_data(struct nvme_command *c, u32 data_len) +{ + struct nvme_sgl_desc *sg = &c->common.dptr.sgl; + + sg->addr = 0; + sg->length = cpu_to_le32(data_len); + sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | NVME_SGL_FMT_TRANSPORT_A; +} + +static void nvme_tcp_ofld_submit_async_event(struct nvme_ctrl *arg) +{ + struct nvme_tcp_ofld_ctrl *ctrl = to_tcp_ofld_ctrl(arg); + struct nvme_tcp_ofld_queue *queue = &ctrl->queues[0]; + struct nvme_tcp_ofld_dev *dev = queue->dev; + struct nvme_tcp_ofld_ops *ops = dev->ops; + + ctrl->async_req.nvme_cmd.common.opcode = nvme_admin_async_event; + ctrl->async_req.nvme_cmd.common.command_id = NVME_AQ_BLK_MQ_DEPTH; + ctrl->async_req.nvme_cmd.common.flags |= NVME_CMD_SGL_METABUF; + + nvme_tcp_ofld_set_sg_null(&ctrl->async_req.nvme_cmd); + + ctrl->async_req.async = true; + ctrl->async_req.queue = queue; + ctrl->async_req.done = nvme_tcp_ofld_async_req_done; + + ops->send_req(&ctrl->async_req); +} + static void nvme_tcp_ofld_teardown_admin_queue(struct nvme_ctrl *nctrl, bool remove) { @@ -836,9 +907,13 @@ nvme_tcp_ofld_init_request(struct blk_mq_tag_set *set, unsigned int numa_node) { struct nvme_tcp_ofld_req *req = blk_mq_rq_to_pdu(rq); + struct nvme_tcp_ofld_ctrl *ctrl = set->driver_data; + int qid; - /* Placeholder - init request */ - + qid = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; + req->queue = &ctrl->queues[qid]; + nvme_req(rq)->ctrl = &ctrl->nctrl; + nvme_req(rq)->cmd = &req->nvme_cmd; req->done = nvme_tcp_ofld_req_done; return 0; @@ -854,9 +929,46 @@ static blk_status_t nvme_tcp_ofld_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { - /* Call nvme_setup_cmd(...) */ + struct nvme_tcp_ofld_req *req = blk_mq_rq_to_pdu(bd->rq); + struct nvme_tcp_ofld_queue *queue = hctx->driver_data; + struct nvme_tcp_ofld_ctrl *ctrl = queue->ctrl; + struct nvme_ns *ns = hctx->queue->queuedata; + struct nvme_tcp_ofld_dev *dev = queue->dev; + struct nvme_tcp_ofld_ops *ops = dev->ops; + struct nvme_command *nvme_cmd; + struct request *rq = bd->rq; + bool queue_ready; + u32 data_len; + int rc; + + queue_ready = test_bit(NVME_TCP_OFLD_Q_LIVE, &queue->flags); + + req->async = false; + + if (!nvme_check_ready(&ctrl->nctrl, rq, queue_ready)) + return nvme_fail_nonready_command(&ctrl->nctrl, rq); + + rc = nvme_setup_cmd(ns, rq); + if (unlikely(rc)) + return rc; - /* Call ops->send_req(...) */ + blk_mq_start_request(rq); + + nvme_cmd = &req->nvme_cmd; + nvme_cmd->common.flags |= NVME_CMD_SGL_METABUF; + + data_len = blk_rq_nr_phys_segments(rq) ? blk_rq_payload_bytes(rq) : 0; + if (!data_len) + nvme_tcp_ofld_set_sg_null(&req->nvme_cmd); + else if ((rq_data_dir(rq) == WRITE) && + data_len <= nvme_tcp_ofld_inline_data_size(queue)) + nvme_tcp_ofld_set_sg_inline(queue, nvme_cmd, data_len); + else + nvme_tcp_ofld_map_data(nvme_cmd, data_len); + + rc = ops->send_req(req); + if (unlikely(rc)) + return rc; return BLK_STS_OK; } @@ -929,9 +1041,56 @@ static int nvme_tcp_ofld_map_queues(struct blk_mq_tag_set *set) static int nvme_tcp_ofld_poll(struct blk_mq_hw_ctx *hctx) { - /* Placeholder - Implement polling mechanism */ + struct nvme_tcp_ofld_queue *queue = hctx->driver_data; + struct nvme_tcp_ofld_dev *dev = queue->dev; + struct nvme_tcp_ofld_ops *ops = dev->ops; - return 0; + return ops->poll_queue(queue); +} + +static void nvme_tcp_ofld_complete_timed_out(struct request *rq) +{ + struct nvme_tcp_ofld_req *req = blk_mq_rq_to_pdu(rq); + struct nvme_ctrl *nctrl = &req->queue->ctrl->nctrl; + + nvme_tcp_ofld_stop_queue(nctrl, nvme_tcp_ofld_qid(req->queue)); + if (blk_mq_request_started(rq) && !blk_mq_request_completed(rq)) { + nvme_req(rq)->status = NVME_SC_HOST_ABORTED_CMD; + blk_mq_complete_request(rq); + } +} + +static enum blk_eh_timer_return nvme_tcp_ofld_timeout(struct request *rq, bool reserved) +{ + struct nvme_tcp_ofld_req *req = blk_mq_rq_to_pdu(rq); + struct nvme_tcp_ofld_ctrl *ctrl = req->queue->ctrl; + + dev_warn(ctrl->nctrl.device, + "queue %d: timeout request %#x type %d\n", + nvme_tcp_ofld_qid(req->queue), rq->tag, req->nvme_cmd.common.opcode); + + if (ctrl->nctrl.state != NVME_CTRL_LIVE) { + /* + * If we are resetting, connecting or deleting we should + * complete immediately because we may block controller + * teardown or setup sequence + * - ctrl disable/shutdown fabrics requests + * - connect requests + * - initialization admin requests + * - I/O requests that entered after unquiescing and + * the controller stopped responding + * + * All other requests should be cancelled by the error + * recovery work, so it's fine that we fail it here. + */ + nvme_tcp_ofld_complete_timed_out(rq); + + return BLK_EH_DONE; + } + + nvme_tcp_ofld_error_recovery(&ctrl->nctrl); + + return BLK_EH_RESET_TIMER; } static struct blk_mq_ops nvme_tcp_ofld_mq_ops = { @@ -940,6 +1099,7 @@ static struct blk_mq_ops nvme_tcp_ofld_mq_ops = { .init_request = nvme_tcp_ofld_init_request, .exit_request = nvme_tcp_ofld_exit_request, .init_hctx = nvme_tcp_ofld_init_hctx, + .timeout = nvme_tcp_ofld_timeout, .map_queues = nvme_tcp_ofld_map_queues, .poll = nvme_tcp_ofld_poll, }; @@ -950,6 +1110,7 @@ static struct blk_mq_ops nvme_tcp_ofld_admin_mq_ops = { .init_request = nvme_tcp_ofld_init_request, .exit_request = nvme_tcp_ofld_exit_request, .init_hctx = nvme_tcp_ofld_init_admin_hctx, + .timeout = nvme_tcp_ofld_timeout, }; static const struct nvme_ctrl_ops nvme_tcp_ofld_ctrl_ops = { @@ -960,6 +1121,7 @@ static const struct nvme_ctrl_ops nvme_tcp_ofld_ctrl_ops = { .reg_read64 = nvmf_reg_read64, .reg_write32 = nvmf_reg_write32, .free_ctrl = nvme_tcp_ofld_free_ctrl, + .submit_async_event = nvme_tcp_ofld_submit_async_event, .delete_ctrl = nvme_tcp_ofld_delete_ctrl, .get_address = nvmf_get_address, }; diff --git a/drivers/nvme/host/tcp-offload.h b/drivers/nvme/host/tcp-offload.h index 875fcd3ec04a..2ac5b2428612 100644 --- a/drivers/nvme/host/tcp-offload.h +++ b/drivers/nvme/host/tcp-offload.h @@ -114,6 +114,8 @@ struct nvme_tcp_ofld_ctrl { /* Connectivity params */ struct nvme_tcp_ofld_ctrl_con_params conn_params; + struct nvme_tcp_ofld_req async_req; + /* Vendor specific driver context */ void *private_data; };