mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 17:36:57 +07:00
f87c89ad93
Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2040 lines
51 KiB
C
2040 lines
51 KiB
C
/*
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* NVMe over Fabrics RDMA host code.
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* Copyright (c) 2015-2016 HGST, a Western Digital Company.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <linux/atomic.h>
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#include <linux/blk-mq.h>
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#include <linux/blk-mq-rdma.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/scatterlist.h>
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#include <linux/nvme.h>
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#include <asm/unaligned.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/rdma_cm.h>
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#include <linux/nvme-rdma.h>
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#include "nvme.h"
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#include "fabrics.h"
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#define NVME_RDMA_CONNECT_TIMEOUT_MS 3000 /* 3 second */
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#define NVME_RDMA_MAX_SEGMENTS 256
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#define NVME_RDMA_MAX_INLINE_SEGMENTS 1
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/*
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* We handle AEN commands ourselves and don't even let the
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* block layer know about them.
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*/
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#define NVME_RDMA_NR_AEN_COMMANDS 1
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#define NVME_RDMA_AQ_BLKMQ_DEPTH \
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(NVME_AQ_DEPTH - NVME_RDMA_NR_AEN_COMMANDS)
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struct nvme_rdma_device {
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struct ib_device *dev;
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struct ib_pd *pd;
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struct kref ref;
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struct list_head entry;
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};
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struct nvme_rdma_qe {
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struct ib_cqe cqe;
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void *data;
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u64 dma;
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};
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struct nvme_rdma_queue;
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struct nvme_rdma_request {
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struct nvme_request req;
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struct ib_mr *mr;
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struct nvme_rdma_qe sqe;
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struct ib_sge sge[1 + NVME_RDMA_MAX_INLINE_SEGMENTS];
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u32 num_sge;
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int nents;
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bool inline_data;
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struct ib_reg_wr reg_wr;
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struct ib_cqe reg_cqe;
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struct nvme_rdma_queue *queue;
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struct sg_table sg_table;
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struct scatterlist first_sgl[];
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};
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enum nvme_rdma_queue_flags {
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NVME_RDMA_Q_ALLOCATED = 0,
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NVME_RDMA_Q_LIVE = 1,
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};
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struct nvme_rdma_queue {
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struct nvme_rdma_qe *rsp_ring;
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atomic_t sig_count;
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int queue_size;
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size_t cmnd_capsule_len;
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struct nvme_rdma_ctrl *ctrl;
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struct nvme_rdma_device *device;
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struct ib_cq *ib_cq;
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struct ib_qp *qp;
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unsigned long flags;
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struct rdma_cm_id *cm_id;
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int cm_error;
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struct completion cm_done;
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};
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struct nvme_rdma_ctrl {
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/* read only in the hot path */
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struct nvme_rdma_queue *queues;
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/* other member variables */
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struct blk_mq_tag_set tag_set;
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struct work_struct delete_work;
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struct work_struct err_work;
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struct nvme_rdma_qe async_event_sqe;
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struct delayed_work reconnect_work;
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struct list_head list;
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struct blk_mq_tag_set admin_tag_set;
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struct nvme_rdma_device *device;
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u32 max_fr_pages;
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struct sockaddr_storage addr;
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struct sockaddr_storage src_addr;
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struct nvme_ctrl ctrl;
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};
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static inline struct nvme_rdma_ctrl *to_rdma_ctrl(struct nvme_ctrl *ctrl)
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{
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return container_of(ctrl, struct nvme_rdma_ctrl, ctrl);
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}
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static LIST_HEAD(device_list);
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static DEFINE_MUTEX(device_list_mutex);
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static LIST_HEAD(nvme_rdma_ctrl_list);
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static DEFINE_MUTEX(nvme_rdma_ctrl_mutex);
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/*
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* Disabling this option makes small I/O goes faster, but is fundamentally
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* unsafe. With it turned off we will have to register a global rkey that
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* allows read and write access to all physical memory.
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*/
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static bool register_always = true;
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module_param(register_always, bool, 0444);
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MODULE_PARM_DESC(register_always,
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"Use memory registration even for contiguous memory regions");
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static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id,
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struct rdma_cm_event *event);
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static void nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc);
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static const struct blk_mq_ops nvme_rdma_mq_ops;
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static const struct blk_mq_ops nvme_rdma_admin_mq_ops;
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/* XXX: really should move to a generic header sooner or later.. */
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static inline void put_unaligned_le24(u32 val, u8 *p)
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{
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*p++ = val;
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*p++ = val >> 8;
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*p++ = val >> 16;
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}
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static inline int nvme_rdma_queue_idx(struct nvme_rdma_queue *queue)
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{
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return queue - queue->ctrl->queues;
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}
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static inline size_t nvme_rdma_inline_data_size(struct nvme_rdma_queue *queue)
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{
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return queue->cmnd_capsule_len - sizeof(struct nvme_command);
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}
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static void nvme_rdma_free_qe(struct ib_device *ibdev, struct nvme_rdma_qe *qe,
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size_t capsule_size, enum dma_data_direction dir)
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{
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ib_dma_unmap_single(ibdev, qe->dma, capsule_size, dir);
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kfree(qe->data);
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}
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static int nvme_rdma_alloc_qe(struct ib_device *ibdev, struct nvme_rdma_qe *qe,
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size_t capsule_size, enum dma_data_direction dir)
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{
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qe->data = kzalloc(capsule_size, GFP_KERNEL);
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if (!qe->data)
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return -ENOMEM;
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qe->dma = ib_dma_map_single(ibdev, qe->data, capsule_size, dir);
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if (ib_dma_mapping_error(ibdev, qe->dma)) {
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kfree(qe->data);
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return -ENOMEM;
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}
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return 0;
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}
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static void nvme_rdma_free_ring(struct ib_device *ibdev,
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struct nvme_rdma_qe *ring, size_t ib_queue_size,
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size_t capsule_size, enum dma_data_direction dir)
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{
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int i;
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for (i = 0; i < ib_queue_size; i++)
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nvme_rdma_free_qe(ibdev, &ring[i], capsule_size, dir);
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kfree(ring);
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}
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static struct nvme_rdma_qe *nvme_rdma_alloc_ring(struct ib_device *ibdev,
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size_t ib_queue_size, size_t capsule_size,
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enum dma_data_direction dir)
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{
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struct nvme_rdma_qe *ring;
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int i;
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ring = kcalloc(ib_queue_size, sizeof(struct nvme_rdma_qe), GFP_KERNEL);
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if (!ring)
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return NULL;
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for (i = 0; i < ib_queue_size; i++) {
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if (nvme_rdma_alloc_qe(ibdev, &ring[i], capsule_size, dir))
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goto out_free_ring;
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}
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return ring;
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out_free_ring:
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nvme_rdma_free_ring(ibdev, ring, i, capsule_size, dir);
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return NULL;
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}
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static void nvme_rdma_qp_event(struct ib_event *event, void *context)
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{
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pr_debug("QP event %s (%d)\n",
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ib_event_msg(event->event), event->event);
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}
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static int nvme_rdma_wait_for_cm(struct nvme_rdma_queue *queue)
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{
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wait_for_completion_interruptible_timeout(&queue->cm_done,
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msecs_to_jiffies(NVME_RDMA_CONNECT_TIMEOUT_MS) + 1);
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return queue->cm_error;
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}
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static int nvme_rdma_create_qp(struct nvme_rdma_queue *queue, const int factor)
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{
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struct nvme_rdma_device *dev = queue->device;
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struct ib_qp_init_attr init_attr;
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int ret;
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memset(&init_attr, 0, sizeof(init_attr));
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init_attr.event_handler = nvme_rdma_qp_event;
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/* +1 for drain */
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init_attr.cap.max_send_wr = factor * queue->queue_size + 1;
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/* +1 for drain */
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init_attr.cap.max_recv_wr = queue->queue_size + 1;
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init_attr.cap.max_recv_sge = 1;
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init_attr.cap.max_send_sge = 1 + NVME_RDMA_MAX_INLINE_SEGMENTS;
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init_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
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init_attr.qp_type = IB_QPT_RC;
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init_attr.send_cq = queue->ib_cq;
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init_attr.recv_cq = queue->ib_cq;
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ret = rdma_create_qp(queue->cm_id, dev->pd, &init_attr);
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queue->qp = queue->cm_id->qp;
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return ret;
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}
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static int nvme_rdma_reinit_request(void *data, struct request *rq)
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{
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struct nvme_rdma_ctrl *ctrl = data;
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struct nvme_rdma_device *dev = ctrl->device;
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struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
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int ret = 0;
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if (WARN_ON_ONCE(!req->mr))
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return 0;
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ib_dereg_mr(req->mr);
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req->mr = ib_alloc_mr(dev->pd, IB_MR_TYPE_MEM_REG,
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ctrl->max_fr_pages);
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if (IS_ERR(req->mr)) {
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ret = PTR_ERR(req->mr);
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req->mr = NULL;
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goto out;
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}
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req->mr->need_inval = false;
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out:
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return ret;
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}
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static void nvme_rdma_exit_request(struct blk_mq_tag_set *set,
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struct request *rq, unsigned int hctx_idx)
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{
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struct nvme_rdma_ctrl *ctrl = set->driver_data;
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struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
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int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0;
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struct nvme_rdma_queue *queue = &ctrl->queues[queue_idx];
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struct nvme_rdma_device *dev = queue->device;
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if (req->mr)
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ib_dereg_mr(req->mr);
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nvme_rdma_free_qe(dev->dev, &req->sqe, sizeof(struct nvme_command),
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DMA_TO_DEVICE);
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}
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static int nvme_rdma_init_request(struct blk_mq_tag_set *set,
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struct request *rq, unsigned int hctx_idx,
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unsigned int numa_node)
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{
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struct nvme_rdma_ctrl *ctrl = set->driver_data;
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struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
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int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0;
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struct nvme_rdma_queue *queue = &ctrl->queues[queue_idx];
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struct nvme_rdma_device *dev = queue->device;
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struct ib_device *ibdev = dev->dev;
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int ret;
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ret = nvme_rdma_alloc_qe(ibdev, &req->sqe, sizeof(struct nvme_command),
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DMA_TO_DEVICE);
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if (ret)
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return ret;
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req->mr = ib_alloc_mr(dev->pd, IB_MR_TYPE_MEM_REG,
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ctrl->max_fr_pages);
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if (IS_ERR(req->mr)) {
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ret = PTR_ERR(req->mr);
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goto out_free_qe;
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}
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req->queue = queue;
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return 0;
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out_free_qe:
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nvme_rdma_free_qe(dev->dev, &req->sqe, sizeof(struct nvme_command),
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DMA_TO_DEVICE);
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return -ENOMEM;
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}
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static int nvme_rdma_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,
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unsigned int hctx_idx)
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{
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struct nvme_rdma_ctrl *ctrl = data;
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struct nvme_rdma_queue *queue = &ctrl->queues[hctx_idx + 1];
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BUG_ON(hctx_idx >= ctrl->ctrl.queue_count);
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hctx->driver_data = queue;
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return 0;
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}
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static int nvme_rdma_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data,
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unsigned int hctx_idx)
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{
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struct nvme_rdma_ctrl *ctrl = data;
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struct nvme_rdma_queue *queue = &ctrl->queues[0];
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BUG_ON(hctx_idx != 0);
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hctx->driver_data = queue;
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return 0;
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}
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static void nvme_rdma_free_dev(struct kref *ref)
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{
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struct nvme_rdma_device *ndev =
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container_of(ref, struct nvme_rdma_device, ref);
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mutex_lock(&device_list_mutex);
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list_del(&ndev->entry);
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mutex_unlock(&device_list_mutex);
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ib_dealloc_pd(ndev->pd);
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kfree(ndev);
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}
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static void nvme_rdma_dev_put(struct nvme_rdma_device *dev)
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{
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kref_put(&dev->ref, nvme_rdma_free_dev);
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}
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|
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static int nvme_rdma_dev_get(struct nvme_rdma_device *dev)
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{
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return kref_get_unless_zero(&dev->ref);
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}
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|
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static struct nvme_rdma_device *
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nvme_rdma_find_get_device(struct rdma_cm_id *cm_id)
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{
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struct nvme_rdma_device *ndev;
|
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mutex_lock(&device_list_mutex);
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list_for_each_entry(ndev, &device_list, entry) {
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if (ndev->dev->node_guid == cm_id->device->node_guid &&
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nvme_rdma_dev_get(ndev))
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goto out_unlock;
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}
|
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|
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ndev = kzalloc(sizeof(*ndev), GFP_KERNEL);
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if (!ndev)
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goto out_err;
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|
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ndev->dev = cm_id->device;
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kref_init(&ndev->ref);
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|
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ndev->pd = ib_alloc_pd(ndev->dev,
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register_always ? 0 : IB_PD_UNSAFE_GLOBAL_RKEY);
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if (IS_ERR(ndev->pd))
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goto out_free_dev;
|
|
|
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if (!(ndev->dev->attrs.device_cap_flags &
|
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IB_DEVICE_MEM_MGT_EXTENSIONS)) {
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dev_err(&ndev->dev->dev,
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"Memory registrations not supported.\n");
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goto out_free_pd;
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}
|
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|
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list_add(&ndev->entry, &device_list);
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out_unlock:
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mutex_unlock(&device_list_mutex);
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return ndev;
|
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|
|
out_free_pd:
|
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ib_dealloc_pd(ndev->pd);
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out_free_dev:
|
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kfree(ndev);
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out_err:
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mutex_unlock(&device_list_mutex);
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return NULL;
|
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}
|
|
|
|
static void nvme_rdma_destroy_queue_ib(struct nvme_rdma_queue *queue)
|
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{
|
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struct nvme_rdma_device *dev = queue->device;
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struct ib_device *ibdev = dev->dev;
|
|
|
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rdma_destroy_qp(queue->cm_id);
|
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ib_free_cq(queue->ib_cq);
|
|
|
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nvme_rdma_free_ring(ibdev, queue->rsp_ring, queue->queue_size,
|
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sizeof(struct nvme_completion), DMA_FROM_DEVICE);
|
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|
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nvme_rdma_dev_put(dev);
|
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}
|
|
|
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static int nvme_rdma_create_queue_ib(struct nvme_rdma_queue *queue)
|
|
{
|
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struct ib_device *ibdev;
|
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const int send_wr_factor = 3; /* MR, SEND, INV */
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const int cq_factor = send_wr_factor + 1; /* + RECV */
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|
int comp_vector, idx = nvme_rdma_queue_idx(queue);
|
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int ret;
|
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|
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queue->device = nvme_rdma_find_get_device(queue->cm_id);
|
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if (!queue->device) {
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dev_err(queue->cm_id->device->dev.parent,
|
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"no client data found!\n");
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return -ECONNREFUSED;
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}
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ibdev = queue->device->dev;
|
|
|
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/*
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* Spread I/O queues completion vectors according their queue index.
|
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* Admin queues can always go on completion vector 0.
|
|
*/
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comp_vector = idx == 0 ? idx : idx - 1;
|
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|
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/* +1 for ib_stop_cq */
|
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queue->ib_cq = ib_alloc_cq(ibdev, queue,
|
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cq_factor * queue->queue_size + 1,
|
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comp_vector, IB_POLL_SOFTIRQ);
|
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if (IS_ERR(queue->ib_cq)) {
|
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ret = PTR_ERR(queue->ib_cq);
|
|
goto out_put_dev;
|
|
}
|
|
|
|
ret = nvme_rdma_create_qp(queue, send_wr_factor);
|
|
if (ret)
|
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goto out_destroy_ib_cq;
|
|
|
|
queue->rsp_ring = nvme_rdma_alloc_ring(ibdev, queue->queue_size,
|
|
sizeof(struct nvme_completion), DMA_FROM_DEVICE);
|
|
if (!queue->rsp_ring) {
|
|
ret = -ENOMEM;
|
|
goto out_destroy_qp;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_destroy_qp:
|
|
ib_destroy_qp(queue->qp);
|
|
out_destroy_ib_cq:
|
|
ib_free_cq(queue->ib_cq);
|
|
out_put_dev:
|
|
nvme_rdma_dev_put(queue->device);
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_rdma_alloc_queue(struct nvme_rdma_ctrl *ctrl,
|
|
int idx, size_t queue_size)
|
|
{
|
|
struct nvme_rdma_queue *queue;
|
|
struct sockaddr *src_addr = NULL;
|
|
int ret;
|
|
|
|
queue = &ctrl->queues[idx];
|
|
queue->ctrl = ctrl;
|
|
init_completion(&queue->cm_done);
|
|
|
|
if (idx > 0)
|
|
queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16;
|
|
else
|
|
queue->cmnd_capsule_len = sizeof(struct nvme_command);
|
|
|
|
queue->queue_size = queue_size;
|
|
atomic_set(&queue->sig_count, 0);
|
|
|
|
queue->cm_id = rdma_create_id(&init_net, nvme_rdma_cm_handler, queue,
|
|
RDMA_PS_TCP, IB_QPT_RC);
|
|
if (IS_ERR(queue->cm_id)) {
|
|
dev_info(ctrl->ctrl.device,
|
|
"failed to create CM ID: %ld\n", PTR_ERR(queue->cm_id));
|
|
return PTR_ERR(queue->cm_id);
|
|
}
|
|
|
|
if (ctrl->ctrl.opts->mask & NVMF_OPT_HOST_TRADDR)
|
|
src_addr = (struct sockaddr *)&ctrl->src_addr;
|
|
|
|
queue->cm_error = -ETIMEDOUT;
|
|
ret = rdma_resolve_addr(queue->cm_id, src_addr,
|
|
(struct sockaddr *)&ctrl->addr,
|
|
NVME_RDMA_CONNECT_TIMEOUT_MS);
|
|
if (ret) {
|
|
dev_info(ctrl->ctrl.device,
|
|
"rdma_resolve_addr failed (%d).\n", ret);
|
|
goto out_destroy_cm_id;
|
|
}
|
|
|
|
ret = nvme_rdma_wait_for_cm(queue);
|
|
if (ret) {
|
|
dev_info(ctrl->ctrl.device,
|
|
"rdma connection establishment failed (%d)\n", ret);
|
|
goto out_destroy_cm_id;
|
|
}
|
|
|
|
set_bit(NVME_RDMA_Q_ALLOCATED, &queue->flags);
|
|
|
|
return 0;
|
|
|
|
out_destroy_cm_id:
|
|
rdma_destroy_id(queue->cm_id);
|
|
return ret;
|
|
}
|
|
|
|
static void nvme_rdma_stop_queue(struct nvme_rdma_queue *queue)
|
|
{
|
|
if (!test_and_clear_bit(NVME_RDMA_Q_LIVE, &queue->flags))
|
|
return;
|
|
|
|
rdma_disconnect(queue->cm_id);
|
|
ib_drain_qp(queue->qp);
|
|
}
|
|
|
|
static void nvme_rdma_free_queue(struct nvme_rdma_queue *queue)
|
|
{
|
|
if (!test_and_clear_bit(NVME_RDMA_Q_ALLOCATED, &queue->flags))
|
|
return;
|
|
|
|
nvme_rdma_destroy_queue_ib(queue);
|
|
rdma_destroy_id(queue->cm_id);
|
|
}
|
|
|
|
static void nvme_rdma_free_io_queues(struct nvme_rdma_ctrl *ctrl)
|
|
{
|
|
int i;
|
|
|
|
for (i = 1; i < ctrl->ctrl.queue_count; i++)
|
|
nvme_rdma_free_queue(&ctrl->queues[i]);
|
|
}
|
|
|
|
static void nvme_rdma_stop_io_queues(struct nvme_rdma_ctrl *ctrl)
|
|
{
|
|
int i;
|
|
|
|
for (i = 1; i < ctrl->ctrl.queue_count; i++)
|
|
nvme_rdma_stop_queue(&ctrl->queues[i]);
|
|
}
|
|
|
|
static int nvme_rdma_start_queue(struct nvme_rdma_ctrl *ctrl, int idx)
|
|
{
|
|
int ret;
|
|
|
|
if (idx)
|
|
ret = nvmf_connect_io_queue(&ctrl->ctrl, idx);
|
|
else
|
|
ret = nvmf_connect_admin_queue(&ctrl->ctrl);
|
|
|
|
if (!ret)
|
|
set_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[idx].flags);
|
|
else
|
|
dev_info(ctrl->ctrl.device,
|
|
"failed to connect queue: %d ret=%d\n", idx, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_rdma_start_io_queues(struct nvme_rdma_ctrl *ctrl)
|
|
{
|
|
int i, ret = 0;
|
|
|
|
for (i = 1; i < ctrl->ctrl.queue_count; i++) {
|
|
ret = nvme_rdma_start_queue(ctrl, i);
|
|
if (ret)
|
|
goto out_stop_queues;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_stop_queues:
|
|
for (i--; i >= 1; i--)
|
|
nvme_rdma_stop_queue(&ctrl->queues[i]);
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
|
|
{
|
|
struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;
|
|
struct ib_device *ibdev = ctrl->device->dev;
|
|
unsigned int nr_io_queues;
|
|
int i, ret;
|
|
|
|
nr_io_queues = min(opts->nr_io_queues, num_online_cpus());
|
|
|
|
/*
|
|
* we map queues according to the device irq vectors for
|
|
* optimal locality so we don't need more queues than
|
|
* completion vectors.
|
|
*/
|
|
nr_io_queues = min_t(unsigned int, nr_io_queues,
|
|
ibdev->num_comp_vectors);
|
|
|
|
ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctrl->ctrl.queue_count = nr_io_queues + 1;
|
|
if (ctrl->ctrl.queue_count < 2)
|
|
return 0;
|
|
|
|
dev_info(ctrl->ctrl.device,
|
|
"creating %d I/O queues.\n", nr_io_queues);
|
|
|
|
for (i = 1; i < ctrl->ctrl.queue_count; i++) {
|
|
ret = nvme_rdma_alloc_queue(ctrl, i,
|
|
ctrl->ctrl.sqsize + 1);
|
|
if (ret)
|
|
goto out_free_queues;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_free_queues:
|
|
for (i--; i >= 1; i--)
|
|
nvme_rdma_free_queue(&ctrl->queues[i]);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void nvme_rdma_free_tagset(struct nvme_ctrl *nctrl,
|
|
struct blk_mq_tag_set *set)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
|
|
|
|
blk_mq_free_tag_set(set);
|
|
nvme_rdma_dev_put(ctrl->device);
|
|
}
|
|
|
|
static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
|
|
bool admin)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
|
|
struct blk_mq_tag_set *set;
|
|
int ret;
|
|
|
|
if (admin) {
|
|
set = &ctrl->admin_tag_set;
|
|
memset(set, 0, sizeof(*set));
|
|
set->ops = &nvme_rdma_admin_mq_ops;
|
|
set->queue_depth = NVME_RDMA_AQ_BLKMQ_DEPTH;
|
|
set->reserved_tags = 2; /* connect + keep-alive */
|
|
set->numa_node = NUMA_NO_NODE;
|
|
set->cmd_size = sizeof(struct nvme_rdma_request) +
|
|
SG_CHUNK_SIZE * sizeof(struct scatterlist);
|
|
set->driver_data = ctrl;
|
|
set->nr_hw_queues = 1;
|
|
set->timeout = ADMIN_TIMEOUT;
|
|
set->flags = BLK_MQ_F_NO_SCHED;
|
|
} else {
|
|
set = &ctrl->tag_set;
|
|
memset(set, 0, sizeof(*set));
|
|
set->ops = &nvme_rdma_mq_ops;
|
|
set->queue_depth = nctrl->opts->queue_size;
|
|
set->reserved_tags = 1; /* fabric connect */
|
|
set->numa_node = NUMA_NO_NODE;
|
|
set->flags = BLK_MQ_F_SHOULD_MERGE;
|
|
set->cmd_size = sizeof(struct nvme_rdma_request) +
|
|
SG_CHUNK_SIZE * sizeof(struct scatterlist);
|
|
set->driver_data = ctrl;
|
|
set->nr_hw_queues = nctrl->queue_count - 1;
|
|
set->timeout = NVME_IO_TIMEOUT;
|
|
}
|
|
|
|
ret = blk_mq_alloc_tag_set(set);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/*
|
|
* We need a reference on the device as long as the tag_set is alive,
|
|
* as the MRs in the request structures need a valid ib_device.
|
|
*/
|
|
ret = nvme_rdma_dev_get(ctrl->device);
|
|
if (!ret) {
|
|
ret = -EINVAL;
|
|
goto out_free_tagset;
|
|
}
|
|
|
|
return set;
|
|
|
|
out_free_tagset:
|
|
blk_mq_free_tag_set(set);
|
|
out:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static void nvme_rdma_destroy_admin_queue(struct nvme_rdma_ctrl *ctrl,
|
|
bool remove)
|
|
{
|
|
nvme_rdma_free_qe(ctrl->queues[0].device->dev, &ctrl->async_event_sqe,
|
|
sizeof(struct nvme_command), DMA_TO_DEVICE);
|
|
nvme_rdma_stop_queue(&ctrl->queues[0]);
|
|
if (remove) {
|
|
blk_cleanup_queue(ctrl->ctrl.admin_q);
|
|
nvme_rdma_free_tagset(&ctrl->ctrl, ctrl->ctrl.admin_tagset);
|
|
}
|
|
nvme_rdma_free_queue(&ctrl->queues[0]);
|
|
}
|
|
|
|
static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
|
|
bool new)
|
|
{
|
|
int error;
|
|
|
|
error = nvme_rdma_alloc_queue(ctrl, 0, NVME_AQ_DEPTH);
|
|
if (error)
|
|
return error;
|
|
|
|
ctrl->device = ctrl->queues[0].device;
|
|
|
|
ctrl->max_fr_pages = min_t(u32, NVME_RDMA_MAX_SEGMENTS,
|
|
ctrl->device->dev->attrs.max_fast_reg_page_list_len);
|
|
|
|
if (new) {
|
|
ctrl->ctrl.admin_tagset = nvme_rdma_alloc_tagset(&ctrl->ctrl, true);
|
|
if (IS_ERR(ctrl->ctrl.admin_tagset))
|
|
goto out_free_queue;
|
|
|
|
ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set);
|
|
if (IS_ERR(ctrl->ctrl.admin_q)) {
|
|
error = PTR_ERR(ctrl->ctrl.admin_q);
|
|
goto out_free_tagset;
|
|
}
|
|
} else {
|
|
error = nvme_reinit_tagset(&ctrl->ctrl, ctrl->ctrl.admin_tagset);
|
|
if (error)
|
|
goto out_free_queue;
|
|
}
|
|
|
|
error = nvme_rdma_start_queue(ctrl, 0);
|
|
if (error)
|
|
goto out_cleanup_queue;
|
|
|
|
error = ctrl->ctrl.ops->reg_read64(&ctrl->ctrl, NVME_REG_CAP,
|
|
&ctrl->ctrl.cap);
|
|
if (error) {
|
|
dev_err(ctrl->ctrl.device,
|
|
"prop_get NVME_REG_CAP failed\n");
|
|
goto out_cleanup_queue;
|
|
}
|
|
|
|
ctrl->ctrl.sqsize =
|
|
min_t(int, NVME_CAP_MQES(ctrl->ctrl.cap), ctrl->ctrl.sqsize);
|
|
|
|
error = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap);
|
|
if (error)
|
|
goto out_cleanup_queue;
|
|
|
|
ctrl->ctrl.max_hw_sectors =
|
|
(ctrl->max_fr_pages - 1) << (ilog2(SZ_4K) - 9);
|
|
|
|
error = nvme_init_identify(&ctrl->ctrl);
|
|
if (error)
|
|
goto out_cleanup_queue;
|
|
|
|
error = nvme_rdma_alloc_qe(ctrl->queues[0].device->dev,
|
|
&ctrl->async_event_sqe, sizeof(struct nvme_command),
|
|
DMA_TO_DEVICE);
|
|
if (error)
|
|
goto out_cleanup_queue;
|
|
|
|
return 0;
|
|
|
|
out_cleanup_queue:
|
|
if (new)
|
|
blk_cleanup_queue(ctrl->ctrl.admin_q);
|
|
out_free_tagset:
|
|
if (new)
|
|
nvme_rdma_free_tagset(&ctrl->ctrl, ctrl->ctrl.admin_tagset);
|
|
out_free_queue:
|
|
nvme_rdma_free_queue(&ctrl->queues[0]);
|
|
return error;
|
|
}
|
|
|
|
static void nvme_rdma_destroy_io_queues(struct nvme_rdma_ctrl *ctrl,
|
|
bool remove)
|
|
{
|
|
nvme_rdma_stop_io_queues(ctrl);
|
|
if (remove) {
|
|
blk_cleanup_queue(ctrl->ctrl.connect_q);
|
|
nvme_rdma_free_tagset(&ctrl->ctrl, ctrl->ctrl.tagset);
|
|
}
|
|
nvme_rdma_free_io_queues(ctrl);
|
|
}
|
|
|
|
static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
|
|
{
|
|
int ret;
|
|
|
|
ret = nvme_rdma_alloc_io_queues(ctrl);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (new) {
|
|
ctrl->ctrl.tagset = nvme_rdma_alloc_tagset(&ctrl->ctrl, false);
|
|
if (IS_ERR(ctrl->ctrl.tagset))
|
|
goto out_free_io_queues;
|
|
|
|
ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set);
|
|
if (IS_ERR(ctrl->ctrl.connect_q)) {
|
|
ret = PTR_ERR(ctrl->ctrl.connect_q);
|
|
goto out_free_tag_set;
|
|
}
|
|
} else {
|
|
ret = nvme_reinit_tagset(&ctrl->ctrl, ctrl->ctrl.tagset);
|
|
if (ret)
|
|
goto out_free_io_queues;
|
|
|
|
blk_mq_update_nr_hw_queues(&ctrl->tag_set,
|
|
ctrl->ctrl.queue_count - 1);
|
|
}
|
|
|
|
ret = nvme_rdma_start_io_queues(ctrl);
|
|
if (ret)
|
|
goto out_cleanup_connect_q;
|
|
|
|
return 0;
|
|
|
|
out_cleanup_connect_q:
|
|
if (new)
|
|
blk_cleanup_queue(ctrl->ctrl.connect_q);
|
|
out_free_tag_set:
|
|
if (new)
|
|
nvme_rdma_free_tagset(&ctrl->ctrl, ctrl->ctrl.tagset);
|
|
out_free_io_queues:
|
|
nvme_rdma_free_io_queues(ctrl);
|
|
return ret;
|
|
}
|
|
|
|
static void nvme_rdma_free_ctrl(struct nvme_ctrl *nctrl)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
|
|
|
|
if (list_empty(&ctrl->list))
|
|
goto free_ctrl;
|
|
|
|
mutex_lock(&nvme_rdma_ctrl_mutex);
|
|
list_del(&ctrl->list);
|
|
mutex_unlock(&nvme_rdma_ctrl_mutex);
|
|
|
|
kfree(ctrl->queues);
|
|
nvmf_free_options(nctrl->opts);
|
|
free_ctrl:
|
|
kfree(ctrl);
|
|
}
|
|
|
|
static void nvme_rdma_reconnect_or_remove(struct nvme_rdma_ctrl *ctrl)
|
|
{
|
|
/* If we are resetting/deleting then do nothing */
|
|
if (ctrl->ctrl.state != NVME_CTRL_RECONNECTING) {
|
|
WARN_ON_ONCE(ctrl->ctrl.state == NVME_CTRL_NEW ||
|
|
ctrl->ctrl.state == NVME_CTRL_LIVE);
|
|
return;
|
|
}
|
|
|
|
if (nvmf_should_reconnect(&ctrl->ctrl)) {
|
|
dev_info(ctrl->ctrl.device, "Reconnecting in %d seconds...\n",
|
|
ctrl->ctrl.opts->reconnect_delay);
|
|
queue_delayed_work(nvme_wq, &ctrl->reconnect_work,
|
|
ctrl->ctrl.opts->reconnect_delay * HZ);
|
|
} else {
|
|
dev_info(ctrl->ctrl.device, "Removing controller...\n");
|
|
queue_work(nvme_wq, &ctrl->delete_work);
|
|
}
|
|
}
|
|
|
|
static void nvme_rdma_reconnect_ctrl_work(struct work_struct *work)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = container_of(to_delayed_work(work),
|
|
struct nvme_rdma_ctrl, reconnect_work);
|
|
bool changed;
|
|
int ret;
|
|
|
|
++ctrl->ctrl.nr_reconnects;
|
|
|
|
ret = nvme_rdma_configure_admin_queue(ctrl, false);
|
|
if (ret)
|
|
goto requeue;
|
|
|
|
if (ctrl->ctrl.queue_count > 1) {
|
|
ret = nvme_rdma_configure_io_queues(ctrl, false);
|
|
if (ret)
|
|
goto destroy_admin;
|
|
}
|
|
|
|
changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
|
|
if (!changed) {
|
|
/* state change failure is ok if we're in DELETING state */
|
|
WARN_ON_ONCE(ctrl->ctrl.state != NVME_CTRL_DELETING);
|
|
return;
|
|
}
|
|
|
|
nvme_start_ctrl(&ctrl->ctrl);
|
|
|
|
dev_info(ctrl->ctrl.device, "Successfully reconnected (%d attempts)\n",
|
|
ctrl->ctrl.nr_reconnects);
|
|
|
|
ctrl->ctrl.nr_reconnects = 0;
|
|
|
|
return;
|
|
|
|
destroy_admin:
|
|
nvme_rdma_destroy_admin_queue(ctrl, false);
|
|
requeue:
|
|
dev_info(ctrl->ctrl.device, "Failed reconnect attempt %d\n",
|
|
ctrl->ctrl.nr_reconnects);
|
|
nvme_rdma_reconnect_or_remove(ctrl);
|
|
}
|
|
|
|
static void nvme_rdma_error_recovery_work(struct work_struct *work)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = container_of(work,
|
|
struct nvme_rdma_ctrl, err_work);
|
|
|
|
nvme_stop_keep_alive(&ctrl->ctrl);
|
|
|
|
if (ctrl->ctrl.queue_count > 1) {
|
|
nvme_stop_queues(&ctrl->ctrl);
|
|
blk_mq_tagset_busy_iter(&ctrl->tag_set,
|
|
nvme_cancel_request, &ctrl->ctrl);
|
|
nvme_rdma_destroy_io_queues(ctrl, false);
|
|
}
|
|
|
|
blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
|
|
blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
|
|
nvme_cancel_request, &ctrl->ctrl);
|
|
nvme_rdma_destroy_admin_queue(ctrl, false);
|
|
|
|
/*
|
|
* queues are not a live anymore, so restart the queues to fail fast
|
|
* new IO
|
|
*/
|
|
blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
|
|
nvme_start_queues(&ctrl->ctrl);
|
|
|
|
nvme_rdma_reconnect_or_remove(ctrl);
|
|
}
|
|
|
|
static void nvme_rdma_error_recovery(struct nvme_rdma_ctrl *ctrl)
|
|
{
|
|
if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RECONNECTING))
|
|
return;
|
|
|
|
queue_work(nvme_wq, &ctrl->err_work);
|
|
}
|
|
|
|
static void nvme_rdma_wr_error(struct ib_cq *cq, struct ib_wc *wc,
|
|
const char *op)
|
|
{
|
|
struct nvme_rdma_queue *queue = cq->cq_context;
|
|
struct nvme_rdma_ctrl *ctrl = queue->ctrl;
|
|
|
|
if (ctrl->ctrl.state == NVME_CTRL_LIVE)
|
|
dev_info(ctrl->ctrl.device,
|
|
"%s for CQE 0x%p failed with status %s (%d)\n",
|
|
op, wc->wr_cqe,
|
|
ib_wc_status_msg(wc->status), wc->status);
|
|
nvme_rdma_error_recovery(ctrl);
|
|
}
|
|
|
|
static void nvme_rdma_memreg_done(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
if (unlikely(wc->status != IB_WC_SUCCESS))
|
|
nvme_rdma_wr_error(cq, wc, "MEMREG");
|
|
}
|
|
|
|
static void nvme_rdma_inv_rkey_done(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
if (unlikely(wc->status != IB_WC_SUCCESS))
|
|
nvme_rdma_wr_error(cq, wc, "LOCAL_INV");
|
|
}
|
|
|
|
static int nvme_rdma_inv_rkey(struct nvme_rdma_queue *queue,
|
|
struct nvme_rdma_request *req)
|
|
{
|
|
struct ib_send_wr *bad_wr;
|
|
struct ib_send_wr wr = {
|
|
.opcode = IB_WR_LOCAL_INV,
|
|
.next = NULL,
|
|
.num_sge = 0,
|
|
.send_flags = 0,
|
|
.ex.invalidate_rkey = req->mr->rkey,
|
|
};
|
|
|
|
req->reg_cqe.done = nvme_rdma_inv_rkey_done;
|
|
wr.wr_cqe = &req->reg_cqe;
|
|
|
|
return ib_post_send(queue->qp, &wr, &bad_wr);
|
|
}
|
|
|
|
static void nvme_rdma_unmap_data(struct nvme_rdma_queue *queue,
|
|
struct request *rq)
|
|
{
|
|
struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
|
|
struct nvme_rdma_ctrl *ctrl = queue->ctrl;
|
|
struct nvme_rdma_device *dev = queue->device;
|
|
struct ib_device *ibdev = dev->dev;
|
|
int res;
|
|
|
|
if (!blk_rq_bytes(rq))
|
|
return;
|
|
|
|
if (req->mr->need_inval && test_bit(NVME_RDMA_Q_LIVE, &req->queue->flags)) {
|
|
res = nvme_rdma_inv_rkey(queue, req);
|
|
if (unlikely(res < 0)) {
|
|
dev_err(ctrl->ctrl.device,
|
|
"Queueing INV WR for rkey %#x failed (%d)\n",
|
|
req->mr->rkey, res);
|
|
nvme_rdma_error_recovery(queue->ctrl);
|
|
}
|
|
}
|
|
|
|
ib_dma_unmap_sg(ibdev, req->sg_table.sgl,
|
|
req->nents, rq_data_dir(rq) ==
|
|
WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
|
|
|
nvme_cleanup_cmd(rq);
|
|
sg_free_table_chained(&req->sg_table, true);
|
|
}
|
|
|
|
static int nvme_rdma_set_sg_null(struct nvme_command *c)
|
|
{
|
|
struct nvme_keyed_sgl_desc *sg = &c->common.dptr.ksgl;
|
|
|
|
sg->addr = 0;
|
|
put_unaligned_le24(0, sg->length);
|
|
put_unaligned_le32(0, sg->key);
|
|
sg->type = NVME_KEY_SGL_FMT_DATA_DESC << 4;
|
|
return 0;
|
|
}
|
|
|
|
static int nvme_rdma_map_sg_inline(struct nvme_rdma_queue *queue,
|
|
struct nvme_rdma_request *req, struct nvme_command *c)
|
|
{
|
|
struct nvme_sgl_desc *sg = &c->common.dptr.sgl;
|
|
|
|
req->sge[1].addr = sg_dma_address(req->sg_table.sgl);
|
|
req->sge[1].length = sg_dma_len(req->sg_table.sgl);
|
|
req->sge[1].lkey = queue->device->pd->local_dma_lkey;
|
|
|
|
sg->addr = cpu_to_le64(queue->ctrl->ctrl.icdoff);
|
|
sg->length = cpu_to_le32(sg_dma_len(req->sg_table.sgl));
|
|
sg->type = (NVME_SGL_FMT_DATA_DESC << 4) | NVME_SGL_FMT_OFFSET;
|
|
|
|
req->inline_data = true;
|
|
req->num_sge++;
|
|
return 0;
|
|
}
|
|
|
|
static int nvme_rdma_map_sg_single(struct nvme_rdma_queue *queue,
|
|
struct nvme_rdma_request *req, struct nvme_command *c)
|
|
{
|
|
struct nvme_keyed_sgl_desc *sg = &c->common.dptr.ksgl;
|
|
|
|
sg->addr = cpu_to_le64(sg_dma_address(req->sg_table.sgl));
|
|
put_unaligned_le24(sg_dma_len(req->sg_table.sgl), sg->length);
|
|
put_unaligned_le32(queue->device->pd->unsafe_global_rkey, sg->key);
|
|
sg->type = NVME_KEY_SGL_FMT_DATA_DESC << 4;
|
|
return 0;
|
|
}
|
|
|
|
static int nvme_rdma_map_sg_fr(struct nvme_rdma_queue *queue,
|
|
struct nvme_rdma_request *req, struct nvme_command *c,
|
|
int count)
|
|
{
|
|
struct nvme_keyed_sgl_desc *sg = &c->common.dptr.ksgl;
|
|
int nr;
|
|
|
|
/*
|
|
* Align the MR to a 4K page size to match the ctrl page size and
|
|
* the block virtual boundary.
|
|
*/
|
|
nr = ib_map_mr_sg(req->mr, req->sg_table.sgl, count, NULL, SZ_4K);
|
|
if (unlikely(nr < count)) {
|
|
if (nr < 0)
|
|
return nr;
|
|
return -EINVAL;
|
|
}
|
|
|
|
ib_update_fast_reg_key(req->mr, ib_inc_rkey(req->mr->rkey));
|
|
|
|
req->reg_cqe.done = nvme_rdma_memreg_done;
|
|
memset(&req->reg_wr, 0, sizeof(req->reg_wr));
|
|
req->reg_wr.wr.opcode = IB_WR_REG_MR;
|
|
req->reg_wr.wr.wr_cqe = &req->reg_cqe;
|
|
req->reg_wr.wr.num_sge = 0;
|
|
req->reg_wr.mr = req->mr;
|
|
req->reg_wr.key = req->mr->rkey;
|
|
req->reg_wr.access = IB_ACCESS_LOCAL_WRITE |
|
|
IB_ACCESS_REMOTE_READ |
|
|
IB_ACCESS_REMOTE_WRITE;
|
|
|
|
req->mr->need_inval = true;
|
|
|
|
sg->addr = cpu_to_le64(req->mr->iova);
|
|
put_unaligned_le24(req->mr->length, sg->length);
|
|
put_unaligned_le32(req->mr->rkey, sg->key);
|
|
sg->type = (NVME_KEY_SGL_FMT_DATA_DESC << 4) |
|
|
NVME_SGL_FMT_INVALIDATE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvme_rdma_map_data(struct nvme_rdma_queue *queue,
|
|
struct request *rq, struct nvme_command *c)
|
|
{
|
|
struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
|
|
struct nvme_rdma_device *dev = queue->device;
|
|
struct ib_device *ibdev = dev->dev;
|
|
int count, ret;
|
|
|
|
req->num_sge = 1;
|
|
req->inline_data = false;
|
|
req->mr->need_inval = false;
|
|
|
|
c->common.flags |= NVME_CMD_SGL_METABUF;
|
|
|
|
if (!blk_rq_bytes(rq))
|
|
return nvme_rdma_set_sg_null(c);
|
|
|
|
req->sg_table.sgl = req->first_sgl;
|
|
ret = sg_alloc_table_chained(&req->sg_table,
|
|
blk_rq_nr_phys_segments(rq), req->sg_table.sgl);
|
|
if (ret)
|
|
return -ENOMEM;
|
|
|
|
req->nents = blk_rq_map_sg(rq->q, rq, req->sg_table.sgl);
|
|
|
|
count = ib_dma_map_sg(ibdev, req->sg_table.sgl, req->nents,
|
|
rq_data_dir(rq) == WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
|
if (unlikely(count <= 0)) {
|
|
sg_free_table_chained(&req->sg_table, true);
|
|
return -EIO;
|
|
}
|
|
|
|
if (count == 1) {
|
|
if (rq_data_dir(rq) == WRITE && nvme_rdma_queue_idx(queue) &&
|
|
blk_rq_payload_bytes(rq) <=
|
|
nvme_rdma_inline_data_size(queue))
|
|
return nvme_rdma_map_sg_inline(queue, req, c);
|
|
|
|
if (dev->pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY)
|
|
return nvme_rdma_map_sg_single(queue, req, c);
|
|
}
|
|
|
|
return nvme_rdma_map_sg_fr(queue, req, c, count);
|
|
}
|
|
|
|
static void nvme_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
if (unlikely(wc->status != IB_WC_SUCCESS))
|
|
nvme_rdma_wr_error(cq, wc, "SEND");
|
|
}
|
|
|
|
/*
|
|
* We want to signal completion at least every queue depth/2. This returns the
|
|
* largest power of two that is not above half of (queue size + 1) to optimize
|
|
* (avoid divisions).
|
|
*/
|
|
static inline bool nvme_rdma_queue_sig_limit(struct nvme_rdma_queue *queue)
|
|
{
|
|
int limit = 1 << ilog2((queue->queue_size + 1) / 2);
|
|
|
|
return (atomic_inc_return(&queue->sig_count) & (limit - 1)) == 0;
|
|
}
|
|
|
|
static int nvme_rdma_post_send(struct nvme_rdma_queue *queue,
|
|
struct nvme_rdma_qe *qe, struct ib_sge *sge, u32 num_sge,
|
|
struct ib_send_wr *first, bool flush)
|
|
{
|
|
struct ib_send_wr wr, *bad_wr;
|
|
int ret;
|
|
|
|
sge->addr = qe->dma;
|
|
sge->length = sizeof(struct nvme_command),
|
|
sge->lkey = queue->device->pd->local_dma_lkey;
|
|
|
|
qe->cqe.done = nvme_rdma_send_done;
|
|
|
|
wr.next = NULL;
|
|
wr.wr_cqe = &qe->cqe;
|
|
wr.sg_list = sge;
|
|
wr.num_sge = num_sge;
|
|
wr.opcode = IB_WR_SEND;
|
|
wr.send_flags = 0;
|
|
|
|
/*
|
|
* Unsignalled send completions are another giant desaster in the
|
|
* IB Verbs spec: If we don't regularly post signalled sends
|
|
* the send queue will fill up and only a QP reset will rescue us.
|
|
* Would have been way to obvious to handle this in hardware or
|
|
* at least the RDMA stack..
|
|
*
|
|
* Always signal the flushes. The magic request used for the flush
|
|
* sequencer is not allocated in our driver's tagset and it's
|
|
* triggered to be freed by blk_cleanup_queue(). So we need to
|
|
* always mark it as signaled to ensure that the "wr_cqe", which is
|
|
* embedded in request's payload, is not freed when __ib_process_cq()
|
|
* calls wr_cqe->done().
|
|
*/
|
|
if (nvme_rdma_queue_sig_limit(queue) || flush)
|
|
wr.send_flags |= IB_SEND_SIGNALED;
|
|
|
|
if (first)
|
|
first->next = ≀
|
|
else
|
|
first = ≀
|
|
|
|
ret = ib_post_send(queue->qp, first, &bad_wr);
|
|
if (unlikely(ret)) {
|
|
dev_err(queue->ctrl->ctrl.device,
|
|
"%s failed with error code %d\n", __func__, ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_rdma_post_recv(struct nvme_rdma_queue *queue,
|
|
struct nvme_rdma_qe *qe)
|
|
{
|
|
struct ib_recv_wr wr, *bad_wr;
|
|
struct ib_sge list;
|
|
int ret;
|
|
|
|
list.addr = qe->dma;
|
|
list.length = sizeof(struct nvme_completion);
|
|
list.lkey = queue->device->pd->local_dma_lkey;
|
|
|
|
qe->cqe.done = nvme_rdma_recv_done;
|
|
|
|
wr.next = NULL;
|
|
wr.wr_cqe = &qe->cqe;
|
|
wr.sg_list = &list;
|
|
wr.num_sge = 1;
|
|
|
|
ret = ib_post_recv(queue->qp, &wr, &bad_wr);
|
|
if (unlikely(ret)) {
|
|
dev_err(queue->ctrl->ctrl.device,
|
|
"%s failed with error code %d\n", __func__, ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static struct blk_mq_tags *nvme_rdma_tagset(struct nvme_rdma_queue *queue)
|
|
{
|
|
u32 queue_idx = nvme_rdma_queue_idx(queue);
|
|
|
|
if (queue_idx == 0)
|
|
return queue->ctrl->admin_tag_set.tags[queue_idx];
|
|
return queue->ctrl->tag_set.tags[queue_idx - 1];
|
|
}
|
|
|
|
static void nvme_rdma_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(arg);
|
|
struct nvme_rdma_queue *queue = &ctrl->queues[0];
|
|
struct ib_device *dev = queue->device->dev;
|
|
struct nvme_rdma_qe *sqe = &ctrl->async_event_sqe;
|
|
struct nvme_command *cmd = sqe->data;
|
|
struct ib_sge sge;
|
|
int ret;
|
|
|
|
if (WARN_ON_ONCE(aer_idx != 0))
|
|
return;
|
|
|
|
ib_dma_sync_single_for_cpu(dev, sqe->dma, sizeof(*cmd), DMA_TO_DEVICE);
|
|
|
|
memset(cmd, 0, sizeof(*cmd));
|
|
cmd->common.opcode = nvme_admin_async_event;
|
|
cmd->common.command_id = NVME_RDMA_AQ_BLKMQ_DEPTH;
|
|
cmd->common.flags |= NVME_CMD_SGL_METABUF;
|
|
nvme_rdma_set_sg_null(cmd);
|
|
|
|
ib_dma_sync_single_for_device(dev, sqe->dma, sizeof(*cmd),
|
|
DMA_TO_DEVICE);
|
|
|
|
ret = nvme_rdma_post_send(queue, sqe, &sge, 1, NULL, false);
|
|
WARN_ON_ONCE(ret);
|
|
}
|
|
|
|
static int nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue,
|
|
struct nvme_completion *cqe, struct ib_wc *wc, int tag)
|
|
{
|
|
struct request *rq;
|
|
struct nvme_rdma_request *req;
|
|
int ret = 0;
|
|
|
|
rq = blk_mq_tag_to_rq(nvme_rdma_tagset(queue), cqe->command_id);
|
|
if (!rq) {
|
|
dev_err(queue->ctrl->ctrl.device,
|
|
"tag 0x%x on QP %#x not found\n",
|
|
cqe->command_id, queue->qp->qp_num);
|
|
nvme_rdma_error_recovery(queue->ctrl);
|
|
return ret;
|
|
}
|
|
req = blk_mq_rq_to_pdu(rq);
|
|
|
|
if (rq->tag == tag)
|
|
ret = 1;
|
|
|
|
if ((wc->wc_flags & IB_WC_WITH_INVALIDATE) &&
|
|
wc->ex.invalidate_rkey == req->mr->rkey)
|
|
req->mr->need_inval = false;
|
|
|
|
nvme_end_request(rq, cqe->status, cqe->result);
|
|
return ret;
|
|
}
|
|
|
|
static int __nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc, int tag)
|
|
{
|
|
struct nvme_rdma_qe *qe =
|
|
container_of(wc->wr_cqe, struct nvme_rdma_qe, cqe);
|
|
struct nvme_rdma_queue *queue = cq->cq_context;
|
|
struct ib_device *ibdev = queue->device->dev;
|
|
struct nvme_completion *cqe = qe->data;
|
|
const size_t len = sizeof(struct nvme_completion);
|
|
int ret = 0;
|
|
|
|
if (unlikely(wc->status != IB_WC_SUCCESS)) {
|
|
nvme_rdma_wr_error(cq, wc, "RECV");
|
|
return 0;
|
|
}
|
|
|
|
ib_dma_sync_single_for_cpu(ibdev, qe->dma, len, DMA_FROM_DEVICE);
|
|
/*
|
|
* AEN requests are special as they don't time out and can
|
|
* survive any kind of queue freeze and often don't respond to
|
|
* aborts. We don't even bother to allocate a struct request
|
|
* for them but rather special case them here.
|
|
*/
|
|
if (unlikely(nvme_rdma_queue_idx(queue) == 0 &&
|
|
cqe->command_id >= NVME_RDMA_AQ_BLKMQ_DEPTH))
|
|
nvme_complete_async_event(&queue->ctrl->ctrl, cqe->status,
|
|
&cqe->result);
|
|
else
|
|
ret = nvme_rdma_process_nvme_rsp(queue, cqe, wc, tag);
|
|
ib_dma_sync_single_for_device(ibdev, qe->dma, len, DMA_FROM_DEVICE);
|
|
|
|
nvme_rdma_post_recv(queue, qe);
|
|
return ret;
|
|
}
|
|
|
|
static void nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
__nvme_rdma_recv_done(cq, wc, -1);
|
|
}
|
|
|
|
static int nvme_rdma_conn_established(struct nvme_rdma_queue *queue)
|
|
{
|
|
int ret, i;
|
|
|
|
for (i = 0; i < queue->queue_size; i++) {
|
|
ret = nvme_rdma_post_recv(queue, &queue->rsp_ring[i]);
|
|
if (ret)
|
|
goto out_destroy_queue_ib;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_destroy_queue_ib:
|
|
nvme_rdma_destroy_queue_ib(queue);
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_rdma_conn_rejected(struct nvme_rdma_queue *queue,
|
|
struct rdma_cm_event *ev)
|
|
{
|
|
struct rdma_cm_id *cm_id = queue->cm_id;
|
|
int status = ev->status;
|
|
const char *rej_msg;
|
|
const struct nvme_rdma_cm_rej *rej_data;
|
|
u8 rej_data_len;
|
|
|
|
rej_msg = rdma_reject_msg(cm_id, status);
|
|
rej_data = rdma_consumer_reject_data(cm_id, ev, &rej_data_len);
|
|
|
|
if (rej_data && rej_data_len >= sizeof(u16)) {
|
|
u16 sts = le16_to_cpu(rej_data->sts);
|
|
|
|
dev_err(queue->ctrl->ctrl.device,
|
|
"Connect rejected: status %d (%s) nvme status %d (%s).\n",
|
|
status, rej_msg, sts, nvme_rdma_cm_msg(sts));
|
|
} else {
|
|
dev_err(queue->ctrl->ctrl.device,
|
|
"Connect rejected: status %d (%s).\n", status, rej_msg);
|
|
}
|
|
|
|
return -ECONNRESET;
|
|
}
|
|
|
|
static int nvme_rdma_addr_resolved(struct nvme_rdma_queue *queue)
|
|
{
|
|
int ret;
|
|
|
|
ret = nvme_rdma_create_queue_ib(queue);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = rdma_resolve_route(queue->cm_id, NVME_RDMA_CONNECT_TIMEOUT_MS);
|
|
if (ret) {
|
|
dev_err(queue->ctrl->ctrl.device,
|
|
"rdma_resolve_route failed (%d).\n",
|
|
queue->cm_error);
|
|
goto out_destroy_queue;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_destroy_queue:
|
|
nvme_rdma_destroy_queue_ib(queue);
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_rdma_route_resolved(struct nvme_rdma_queue *queue)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = queue->ctrl;
|
|
struct rdma_conn_param param = { };
|
|
struct nvme_rdma_cm_req priv = { };
|
|
int ret;
|
|
|
|
param.qp_num = queue->qp->qp_num;
|
|
param.flow_control = 1;
|
|
|
|
param.responder_resources = queue->device->dev->attrs.max_qp_rd_atom;
|
|
/* maximum retry count */
|
|
param.retry_count = 7;
|
|
param.rnr_retry_count = 7;
|
|
param.private_data = &priv;
|
|
param.private_data_len = sizeof(priv);
|
|
|
|
priv.recfmt = cpu_to_le16(NVME_RDMA_CM_FMT_1_0);
|
|
priv.qid = cpu_to_le16(nvme_rdma_queue_idx(queue));
|
|
/*
|
|
* set the admin queue depth to the minimum size
|
|
* specified by the Fabrics standard.
|
|
*/
|
|
if (priv.qid == 0) {
|
|
priv.hrqsize = cpu_to_le16(NVME_AQ_DEPTH);
|
|
priv.hsqsize = cpu_to_le16(NVME_AQ_DEPTH - 1);
|
|
} else {
|
|
/*
|
|
* current interpretation of the fabrics spec
|
|
* is at minimum you make hrqsize sqsize+1, or a
|
|
* 1's based representation of sqsize.
|
|
*/
|
|
priv.hrqsize = cpu_to_le16(queue->queue_size);
|
|
priv.hsqsize = cpu_to_le16(queue->ctrl->ctrl.sqsize);
|
|
}
|
|
|
|
ret = rdma_connect(queue->cm_id, ¶m);
|
|
if (ret) {
|
|
dev_err(ctrl->ctrl.device,
|
|
"rdma_connect failed (%d).\n", ret);
|
|
goto out_destroy_queue_ib;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_destroy_queue_ib:
|
|
nvme_rdma_destroy_queue_ib(queue);
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id,
|
|
struct rdma_cm_event *ev)
|
|
{
|
|
struct nvme_rdma_queue *queue = cm_id->context;
|
|
int cm_error = 0;
|
|
|
|
dev_dbg(queue->ctrl->ctrl.device, "%s (%d): status %d id %p\n",
|
|
rdma_event_msg(ev->event), ev->event,
|
|
ev->status, cm_id);
|
|
|
|
switch (ev->event) {
|
|
case RDMA_CM_EVENT_ADDR_RESOLVED:
|
|
cm_error = nvme_rdma_addr_resolved(queue);
|
|
break;
|
|
case RDMA_CM_EVENT_ROUTE_RESOLVED:
|
|
cm_error = nvme_rdma_route_resolved(queue);
|
|
break;
|
|
case RDMA_CM_EVENT_ESTABLISHED:
|
|
queue->cm_error = nvme_rdma_conn_established(queue);
|
|
/* complete cm_done regardless of success/failure */
|
|
complete(&queue->cm_done);
|
|
return 0;
|
|
case RDMA_CM_EVENT_REJECTED:
|
|
nvme_rdma_destroy_queue_ib(queue);
|
|
cm_error = nvme_rdma_conn_rejected(queue, ev);
|
|
break;
|
|
case RDMA_CM_EVENT_ROUTE_ERROR:
|
|
case RDMA_CM_EVENT_CONNECT_ERROR:
|
|
case RDMA_CM_EVENT_UNREACHABLE:
|
|
nvme_rdma_destroy_queue_ib(queue);
|
|
case RDMA_CM_EVENT_ADDR_ERROR:
|
|
dev_dbg(queue->ctrl->ctrl.device,
|
|
"CM error event %d\n", ev->event);
|
|
cm_error = -ECONNRESET;
|
|
break;
|
|
case RDMA_CM_EVENT_DISCONNECTED:
|
|
case RDMA_CM_EVENT_ADDR_CHANGE:
|
|
case RDMA_CM_EVENT_TIMEWAIT_EXIT:
|
|
dev_dbg(queue->ctrl->ctrl.device,
|
|
"disconnect received - connection closed\n");
|
|
nvme_rdma_error_recovery(queue->ctrl);
|
|
break;
|
|
case RDMA_CM_EVENT_DEVICE_REMOVAL:
|
|
/* device removal is handled via the ib_client API */
|
|
break;
|
|
default:
|
|
dev_err(queue->ctrl->ctrl.device,
|
|
"Unexpected RDMA CM event (%d)\n", ev->event);
|
|
nvme_rdma_error_recovery(queue->ctrl);
|
|
break;
|
|
}
|
|
|
|
if (cm_error) {
|
|
queue->cm_error = cm_error;
|
|
complete(&queue->cm_done);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum blk_eh_timer_return
|
|
nvme_rdma_timeout(struct request *rq, bool reserved)
|
|
{
|
|
struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
|
|
|
|
/* queue error recovery */
|
|
nvme_rdma_error_recovery(req->queue->ctrl);
|
|
|
|
/* fail with DNR on cmd timeout */
|
|
nvme_req(rq)->status = NVME_SC_ABORT_REQ | NVME_SC_DNR;
|
|
|
|
return BLK_EH_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* We cannot accept any other command until the Connect command has completed.
|
|
*/
|
|
static inline blk_status_t
|
|
nvme_rdma_queue_is_ready(struct nvme_rdma_queue *queue, struct request *rq)
|
|
{
|
|
if (unlikely(!test_bit(NVME_RDMA_Q_LIVE, &queue->flags))) {
|
|
struct nvme_command *cmd = nvme_req(rq)->cmd;
|
|
|
|
if (!blk_rq_is_passthrough(rq) ||
|
|
cmd->common.opcode != nvme_fabrics_command ||
|
|
cmd->fabrics.fctype != nvme_fabrics_type_connect) {
|
|
/*
|
|
* reconnecting state means transport disruption, which
|
|
* can take a long time and even might fail permanently,
|
|
* so we can't let incoming I/O be requeued forever.
|
|
* fail it fast to allow upper layers a chance to
|
|
* failover.
|
|
*/
|
|
if (queue->ctrl->ctrl.state == NVME_CTRL_RECONNECTING)
|
|
return BLK_STS_IOERR;
|
|
return BLK_STS_RESOURCE; /* try again later */
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static blk_status_t nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
|
|
const struct blk_mq_queue_data *bd)
|
|
{
|
|
struct nvme_ns *ns = hctx->queue->queuedata;
|
|
struct nvme_rdma_queue *queue = hctx->driver_data;
|
|
struct request *rq = bd->rq;
|
|
struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
|
|
struct nvme_rdma_qe *sqe = &req->sqe;
|
|
struct nvme_command *c = sqe->data;
|
|
bool flush = false;
|
|
struct ib_device *dev;
|
|
blk_status_t ret;
|
|
int err;
|
|
|
|
WARN_ON_ONCE(rq->tag < 0);
|
|
|
|
ret = nvme_rdma_queue_is_ready(queue, rq);
|
|
if (unlikely(ret))
|
|
return ret;
|
|
|
|
dev = queue->device->dev;
|
|
ib_dma_sync_single_for_cpu(dev, sqe->dma,
|
|
sizeof(struct nvme_command), DMA_TO_DEVICE);
|
|
|
|
ret = nvme_setup_cmd(ns, rq, c);
|
|
if (ret)
|
|
return ret;
|
|
|
|
blk_mq_start_request(rq);
|
|
|
|
err = nvme_rdma_map_data(queue, rq, c);
|
|
if (unlikely(err < 0)) {
|
|
dev_err(queue->ctrl->ctrl.device,
|
|
"Failed to map data (%d)\n", err);
|
|
nvme_cleanup_cmd(rq);
|
|
goto err;
|
|
}
|
|
|
|
ib_dma_sync_single_for_device(dev, sqe->dma,
|
|
sizeof(struct nvme_command), DMA_TO_DEVICE);
|
|
|
|
if (req_op(rq) == REQ_OP_FLUSH)
|
|
flush = true;
|
|
err = nvme_rdma_post_send(queue, sqe, req->sge, req->num_sge,
|
|
req->mr->need_inval ? &req->reg_wr.wr : NULL, flush);
|
|
if (unlikely(err)) {
|
|
nvme_rdma_unmap_data(queue, rq);
|
|
goto err;
|
|
}
|
|
|
|
return BLK_STS_OK;
|
|
err:
|
|
if (err == -ENOMEM || err == -EAGAIN)
|
|
return BLK_STS_RESOURCE;
|
|
return BLK_STS_IOERR;
|
|
}
|
|
|
|
static int nvme_rdma_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag)
|
|
{
|
|
struct nvme_rdma_queue *queue = hctx->driver_data;
|
|
struct ib_cq *cq = queue->ib_cq;
|
|
struct ib_wc wc;
|
|
int found = 0;
|
|
|
|
while (ib_poll_cq(cq, 1, &wc) > 0) {
|
|
struct ib_cqe *cqe = wc.wr_cqe;
|
|
|
|
if (cqe) {
|
|
if (cqe->done == nvme_rdma_recv_done)
|
|
found |= __nvme_rdma_recv_done(cq, &wc, tag);
|
|
else
|
|
cqe->done(cq, &wc);
|
|
}
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
static void nvme_rdma_complete_rq(struct request *rq)
|
|
{
|
|
struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
|
|
|
|
nvme_rdma_unmap_data(req->queue, rq);
|
|
nvme_complete_rq(rq);
|
|
}
|
|
|
|
static int nvme_rdma_map_queues(struct blk_mq_tag_set *set)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = set->driver_data;
|
|
|
|
return blk_mq_rdma_map_queues(set, ctrl->device->dev, 0);
|
|
}
|
|
|
|
static const struct blk_mq_ops nvme_rdma_mq_ops = {
|
|
.queue_rq = nvme_rdma_queue_rq,
|
|
.complete = nvme_rdma_complete_rq,
|
|
.init_request = nvme_rdma_init_request,
|
|
.exit_request = nvme_rdma_exit_request,
|
|
.init_hctx = nvme_rdma_init_hctx,
|
|
.poll = nvme_rdma_poll,
|
|
.timeout = nvme_rdma_timeout,
|
|
.map_queues = nvme_rdma_map_queues,
|
|
};
|
|
|
|
static const struct blk_mq_ops nvme_rdma_admin_mq_ops = {
|
|
.queue_rq = nvme_rdma_queue_rq,
|
|
.complete = nvme_rdma_complete_rq,
|
|
.init_request = nvme_rdma_init_request,
|
|
.exit_request = nvme_rdma_exit_request,
|
|
.init_hctx = nvme_rdma_init_admin_hctx,
|
|
.timeout = nvme_rdma_timeout,
|
|
};
|
|
|
|
static void nvme_rdma_shutdown_ctrl(struct nvme_rdma_ctrl *ctrl, bool shutdown)
|
|
{
|
|
cancel_work_sync(&ctrl->err_work);
|
|
cancel_delayed_work_sync(&ctrl->reconnect_work);
|
|
|
|
if (ctrl->ctrl.queue_count > 1) {
|
|
nvme_stop_queues(&ctrl->ctrl);
|
|
blk_mq_tagset_busy_iter(&ctrl->tag_set,
|
|
nvme_cancel_request, &ctrl->ctrl);
|
|
nvme_rdma_destroy_io_queues(ctrl, shutdown);
|
|
}
|
|
|
|
if (shutdown)
|
|
nvme_shutdown_ctrl(&ctrl->ctrl);
|
|
else
|
|
nvme_disable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap);
|
|
|
|
blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
|
|
blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
|
|
nvme_cancel_request, &ctrl->ctrl);
|
|
blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
|
|
nvme_rdma_destroy_admin_queue(ctrl, shutdown);
|
|
}
|
|
|
|
static void nvme_rdma_remove_ctrl(struct nvme_rdma_ctrl *ctrl)
|
|
{
|
|
nvme_remove_namespaces(&ctrl->ctrl);
|
|
nvme_rdma_shutdown_ctrl(ctrl, true);
|
|
nvme_uninit_ctrl(&ctrl->ctrl);
|
|
nvme_put_ctrl(&ctrl->ctrl);
|
|
}
|
|
|
|
static void nvme_rdma_del_ctrl_work(struct work_struct *work)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = container_of(work,
|
|
struct nvme_rdma_ctrl, delete_work);
|
|
|
|
nvme_stop_ctrl(&ctrl->ctrl);
|
|
nvme_rdma_remove_ctrl(ctrl);
|
|
}
|
|
|
|
static int __nvme_rdma_del_ctrl(struct nvme_rdma_ctrl *ctrl)
|
|
{
|
|
if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING))
|
|
return -EBUSY;
|
|
|
|
if (!queue_work(nvme_wq, &ctrl->delete_work))
|
|
return -EBUSY;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvme_rdma_del_ctrl(struct nvme_ctrl *nctrl)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
|
|
int ret = 0;
|
|
|
|
/*
|
|
* Keep a reference until all work is flushed since
|
|
* __nvme_rdma_del_ctrl can free the ctrl mem
|
|
*/
|
|
if (!kref_get_unless_zero(&ctrl->ctrl.kref))
|
|
return -EBUSY;
|
|
ret = __nvme_rdma_del_ctrl(ctrl);
|
|
if (!ret)
|
|
flush_work(&ctrl->delete_work);
|
|
nvme_put_ctrl(&ctrl->ctrl);
|
|
return ret;
|
|
}
|
|
|
|
static void nvme_rdma_reset_ctrl_work(struct work_struct *work)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl =
|
|
container_of(work, struct nvme_rdma_ctrl, ctrl.reset_work);
|
|
int ret;
|
|
bool changed;
|
|
|
|
nvme_stop_ctrl(&ctrl->ctrl);
|
|
nvme_rdma_shutdown_ctrl(ctrl, false);
|
|
|
|
ret = nvme_rdma_configure_admin_queue(ctrl, false);
|
|
if (ret)
|
|
goto out_fail;
|
|
|
|
if (ctrl->ctrl.queue_count > 1) {
|
|
ret = nvme_rdma_configure_io_queues(ctrl, false);
|
|
if (ret)
|
|
goto out_fail;
|
|
}
|
|
|
|
changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
|
|
if (!changed) {
|
|
/* state change failure is ok if we're in DELETING state */
|
|
WARN_ON_ONCE(ctrl->ctrl.state != NVME_CTRL_DELETING);
|
|
return;
|
|
}
|
|
|
|
nvme_start_ctrl(&ctrl->ctrl);
|
|
|
|
return;
|
|
|
|
out_fail:
|
|
dev_warn(ctrl->ctrl.device, "Removing after reset failure\n");
|
|
nvme_rdma_remove_ctrl(ctrl);
|
|
}
|
|
|
|
static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {
|
|
.name = "rdma",
|
|
.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_rdma_free_ctrl,
|
|
.submit_async_event = nvme_rdma_submit_async_event,
|
|
.delete_ctrl = nvme_rdma_del_ctrl,
|
|
.get_address = nvmf_get_address,
|
|
.reinit_request = nvme_rdma_reinit_request,
|
|
};
|
|
|
|
static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev,
|
|
struct nvmf_ctrl_options *opts)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl;
|
|
int ret;
|
|
bool changed;
|
|
char *port;
|
|
|
|
ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
|
|
if (!ctrl)
|
|
return ERR_PTR(-ENOMEM);
|
|
ctrl->ctrl.opts = opts;
|
|
INIT_LIST_HEAD(&ctrl->list);
|
|
|
|
if (opts->mask & NVMF_OPT_TRSVCID)
|
|
port = opts->trsvcid;
|
|
else
|
|
port = __stringify(NVME_RDMA_IP_PORT);
|
|
|
|
ret = inet_pton_with_scope(&init_net, AF_UNSPEC,
|
|
opts->traddr, port, &ctrl->addr);
|
|
if (ret) {
|
|
pr_err("malformed address passed: %s:%s\n", opts->traddr, port);
|
|
goto out_free_ctrl;
|
|
}
|
|
|
|
if (opts->mask & NVMF_OPT_HOST_TRADDR) {
|
|
ret = inet_pton_with_scope(&init_net, AF_UNSPEC,
|
|
opts->host_traddr, NULL, &ctrl->src_addr);
|
|
if (ret) {
|
|
pr_err("malformed src address passed: %s\n",
|
|
opts->host_traddr);
|
|
goto out_free_ctrl;
|
|
}
|
|
}
|
|
|
|
ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_rdma_ctrl_ops,
|
|
0 /* no quirks, we're perfect! */);
|
|
if (ret)
|
|
goto out_free_ctrl;
|
|
|
|
INIT_DELAYED_WORK(&ctrl->reconnect_work,
|
|
nvme_rdma_reconnect_ctrl_work);
|
|
INIT_WORK(&ctrl->err_work, nvme_rdma_error_recovery_work);
|
|
INIT_WORK(&ctrl->delete_work, nvme_rdma_del_ctrl_work);
|
|
INIT_WORK(&ctrl->ctrl.reset_work, nvme_rdma_reset_ctrl_work);
|
|
|
|
ctrl->ctrl.queue_count = opts->nr_io_queues + 1; /* +1 for admin queue */
|
|
ctrl->ctrl.sqsize = opts->queue_size - 1;
|
|
ctrl->ctrl.kato = opts->kato;
|
|
|
|
ret = -ENOMEM;
|
|
ctrl->queues = kcalloc(ctrl->ctrl.queue_count, sizeof(*ctrl->queues),
|
|
GFP_KERNEL);
|
|
if (!ctrl->queues)
|
|
goto out_uninit_ctrl;
|
|
|
|
ret = nvme_rdma_configure_admin_queue(ctrl, true);
|
|
if (ret)
|
|
goto out_kfree_queues;
|
|
|
|
/* sanity check icdoff */
|
|
if (ctrl->ctrl.icdoff) {
|
|
dev_err(ctrl->ctrl.device, "icdoff is not supported!\n");
|
|
ret = -EINVAL;
|
|
goto out_remove_admin_queue;
|
|
}
|
|
|
|
/* sanity check keyed sgls */
|
|
if (!(ctrl->ctrl.sgls & (1 << 20))) {
|
|
dev_err(ctrl->ctrl.device, "Mandatory keyed sgls are not support\n");
|
|
ret = -EINVAL;
|
|
goto out_remove_admin_queue;
|
|
}
|
|
|
|
if (opts->queue_size > ctrl->ctrl.maxcmd) {
|
|
/* warn if maxcmd is lower than queue_size */
|
|
dev_warn(ctrl->ctrl.device,
|
|
"queue_size %zu > ctrl maxcmd %u, clamping down\n",
|
|
opts->queue_size, ctrl->ctrl.maxcmd);
|
|
opts->queue_size = ctrl->ctrl.maxcmd;
|
|
}
|
|
|
|
if (opts->queue_size > ctrl->ctrl.sqsize + 1) {
|
|
/* warn if sqsize is lower than queue_size */
|
|
dev_warn(ctrl->ctrl.device,
|
|
"queue_size %zu > ctrl sqsize %u, clamping down\n",
|
|
opts->queue_size, ctrl->ctrl.sqsize + 1);
|
|
opts->queue_size = ctrl->ctrl.sqsize + 1;
|
|
}
|
|
|
|
if (opts->nr_io_queues) {
|
|
ret = nvme_rdma_configure_io_queues(ctrl, true);
|
|
if (ret)
|
|
goto out_remove_admin_queue;
|
|
}
|
|
|
|
changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
|
|
WARN_ON_ONCE(!changed);
|
|
|
|
dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISpcs\n",
|
|
ctrl->ctrl.opts->subsysnqn, &ctrl->addr);
|
|
|
|
kref_get(&ctrl->ctrl.kref);
|
|
|
|
mutex_lock(&nvme_rdma_ctrl_mutex);
|
|
list_add_tail(&ctrl->list, &nvme_rdma_ctrl_list);
|
|
mutex_unlock(&nvme_rdma_ctrl_mutex);
|
|
|
|
nvme_start_ctrl(&ctrl->ctrl);
|
|
|
|
return &ctrl->ctrl;
|
|
|
|
out_remove_admin_queue:
|
|
nvme_rdma_destroy_admin_queue(ctrl, true);
|
|
out_kfree_queues:
|
|
kfree(ctrl->queues);
|
|
out_uninit_ctrl:
|
|
nvme_uninit_ctrl(&ctrl->ctrl);
|
|
nvme_put_ctrl(&ctrl->ctrl);
|
|
if (ret > 0)
|
|
ret = -EIO;
|
|
return ERR_PTR(ret);
|
|
out_free_ctrl:
|
|
kfree(ctrl);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static struct nvmf_transport_ops nvme_rdma_transport = {
|
|
.name = "rdma",
|
|
.required_opts = NVMF_OPT_TRADDR,
|
|
.allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY |
|
|
NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO,
|
|
.create_ctrl = nvme_rdma_create_ctrl,
|
|
};
|
|
|
|
static void nvme_rdma_remove_one(struct ib_device *ib_device, void *client_data)
|
|
{
|
|
struct nvme_rdma_ctrl *ctrl;
|
|
|
|
/* Delete all controllers using this device */
|
|
mutex_lock(&nvme_rdma_ctrl_mutex);
|
|
list_for_each_entry(ctrl, &nvme_rdma_ctrl_list, list) {
|
|
if (ctrl->device->dev != ib_device)
|
|
continue;
|
|
dev_info(ctrl->ctrl.device,
|
|
"Removing ctrl: NQN \"%s\", addr %pISp\n",
|
|
ctrl->ctrl.opts->subsysnqn, &ctrl->addr);
|
|
__nvme_rdma_del_ctrl(ctrl);
|
|
}
|
|
mutex_unlock(&nvme_rdma_ctrl_mutex);
|
|
|
|
flush_workqueue(nvme_wq);
|
|
}
|
|
|
|
static struct ib_client nvme_rdma_ib_client = {
|
|
.name = "nvme_rdma",
|
|
.remove = nvme_rdma_remove_one
|
|
};
|
|
|
|
static int __init nvme_rdma_init_module(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = ib_register_client(&nvme_rdma_ib_client);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = nvmf_register_transport(&nvme_rdma_transport);
|
|
if (ret)
|
|
goto err_unreg_client;
|
|
|
|
return 0;
|
|
|
|
err_unreg_client:
|
|
ib_unregister_client(&nvme_rdma_ib_client);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit nvme_rdma_cleanup_module(void)
|
|
{
|
|
nvmf_unregister_transport(&nvme_rdma_transport);
|
|
ib_unregister_client(&nvme_rdma_ib_client);
|
|
}
|
|
|
|
module_init(nvme_rdma_init_module);
|
|
module_exit(nvme_rdma_cleanup_module);
|
|
|
|
MODULE_LICENSE("GPL v2");
|