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- // SPDX-License-Identifier: GPL-2.0
- /*
- * NVMe over Fabrics RDMA host code.
- * Copyright (c) 2015-2016 HGST, a Western Digital Company.
- */
- #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/slab.h>
- #include <rdma/mr_pool.h>
- #include <linux/err.h>
- #include <linux/string.h>
- #include <linux/atomic.h>
- #include <linux/blk-mq.h>
- #include <linux/blk-mq-rdma.h>
- #include <linux/blk-integrity.h>
- #include <linux/types.h>
- #include <linux/list.h>
- #include <linux/mutex.h>
- #include <linux/scatterlist.h>
- #include <linux/nvme.h>
- #include <asm/unaligned.h>
- #include <rdma/ib_verbs.h>
- #include <rdma/rdma_cm.h>
- #include <linux/nvme-rdma.h>
- #include "nvme.h"
- #include "fabrics.h"
- #define NVME_RDMA_CM_TIMEOUT_MS 3000 /* 3 second */
- #define NVME_RDMA_MAX_SEGMENTS 256
- #define NVME_RDMA_MAX_INLINE_SEGMENTS 4
- #define NVME_RDMA_DATA_SGL_SIZE \
- (sizeof(struct scatterlist) * NVME_INLINE_SG_CNT)
- #define NVME_RDMA_METADATA_SGL_SIZE \
- (sizeof(struct scatterlist) * NVME_INLINE_METADATA_SG_CNT)
- struct nvme_rdma_device {
- struct ib_device *dev;
- struct ib_pd *pd;
- struct kref ref;
- struct list_head entry;
- unsigned int num_inline_segments;
- };
- struct nvme_rdma_qe {
- struct ib_cqe cqe;
- void *data;
- u64 dma;
- };
- struct nvme_rdma_sgl {
- int nents;
- struct sg_table sg_table;
- };
- struct nvme_rdma_queue;
- struct nvme_rdma_request {
- struct nvme_request req;
- struct ib_mr *mr;
- struct nvme_rdma_qe sqe;
- union nvme_result result;
- __le16 status;
- refcount_t ref;
- struct ib_sge sge[1 + NVME_RDMA_MAX_INLINE_SEGMENTS];
- u32 num_sge;
- struct ib_reg_wr reg_wr;
- struct ib_cqe reg_cqe;
- struct nvme_rdma_queue *queue;
- struct nvme_rdma_sgl data_sgl;
- struct nvme_rdma_sgl *metadata_sgl;
- bool use_sig_mr;
- };
- enum nvme_rdma_queue_flags {
- NVME_RDMA_Q_ALLOCATED = 0,
- NVME_RDMA_Q_LIVE = 1,
- NVME_RDMA_Q_TR_READY = 2,
- };
- struct nvme_rdma_queue {
- struct nvme_rdma_qe *rsp_ring;
- int queue_size;
- size_t cmnd_capsule_len;
- struct nvme_rdma_ctrl *ctrl;
- struct nvme_rdma_device *device;
- struct ib_cq *ib_cq;
- struct ib_qp *qp;
- unsigned long flags;
- struct rdma_cm_id *cm_id;
- int cm_error;
- struct completion cm_done;
- bool pi_support;
- int cq_size;
- struct mutex queue_lock;
- };
- struct nvme_rdma_ctrl {
- /* read only in the hot path */
- struct nvme_rdma_queue *queues;
- /* other member variables */
- struct blk_mq_tag_set tag_set;
- struct work_struct err_work;
- struct nvme_rdma_qe async_event_sqe;
- struct delayed_work reconnect_work;
- struct list_head list;
- struct blk_mq_tag_set admin_tag_set;
- struct nvme_rdma_device *device;
- u32 max_fr_pages;
- struct sockaddr_storage addr;
- struct sockaddr_storage src_addr;
- struct nvme_ctrl ctrl;
- bool use_inline_data;
- u32 io_queues[HCTX_MAX_TYPES];
- };
- static inline struct nvme_rdma_ctrl *to_rdma_ctrl(struct nvme_ctrl *ctrl)
- {
- return container_of(ctrl, struct nvme_rdma_ctrl, ctrl);
- }
- static LIST_HEAD(device_list);
- static DEFINE_MUTEX(device_list_mutex);
- static LIST_HEAD(nvme_rdma_ctrl_list);
- static DEFINE_MUTEX(nvme_rdma_ctrl_mutex);
- /*
- * Disabling this option makes small I/O goes faster, but is fundamentally
- * unsafe. With it turned off we will have to register a global rkey that
- * allows read and write access to all physical memory.
- */
- static bool register_always = true;
- module_param(register_always, bool, 0444);
- MODULE_PARM_DESC(register_always,
- "Use memory registration even for contiguous memory regions");
- static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id,
- struct rdma_cm_event *event);
- static void nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc);
- static void nvme_rdma_complete_rq(struct request *rq);
- static const struct blk_mq_ops nvme_rdma_mq_ops;
- static const struct blk_mq_ops nvme_rdma_admin_mq_ops;
- static inline int nvme_rdma_queue_idx(struct nvme_rdma_queue *queue)
- {
- return queue - queue->ctrl->queues;
- }
- static bool nvme_rdma_poll_queue(struct nvme_rdma_queue *queue)
- {
- return nvme_rdma_queue_idx(queue) >
- queue->ctrl->io_queues[HCTX_TYPE_DEFAULT] +
- queue->ctrl->io_queues[HCTX_TYPE_READ];
- }
- static inline size_t nvme_rdma_inline_data_size(struct nvme_rdma_queue *queue)
- {
- return queue->cmnd_capsule_len - sizeof(struct nvme_command);
- }
- static void nvme_rdma_free_qe(struct ib_device *ibdev, struct nvme_rdma_qe *qe,
- size_t capsule_size, enum dma_data_direction dir)
- {
- ib_dma_unmap_single(ibdev, qe->dma, capsule_size, dir);
- kfree(qe->data);
- }
- static int nvme_rdma_alloc_qe(struct ib_device *ibdev, struct nvme_rdma_qe *qe,
- size_t capsule_size, enum dma_data_direction dir)
- {
- qe->data = kzalloc(capsule_size, GFP_KERNEL);
- if (!qe->data)
- return -ENOMEM;
- qe->dma = ib_dma_map_single(ibdev, qe->data, capsule_size, dir);
- if (ib_dma_mapping_error(ibdev, qe->dma)) {
- kfree(qe->data);
- qe->data = NULL;
- return -ENOMEM;
- }
- return 0;
- }
- static void nvme_rdma_free_ring(struct ib_device *ibdev,
- struct nvme_rdma_qe *ring, size_t ib_queue_size,
- size_t capsule_size, enum dma_data_direction dir)
- {
- int i;
- for (i = 0; i < ib_queue_size; i++)
- nvme_rdma_free_qe(ibdev, &ring[i], capsule_size, dir);
- kfree(ring);
- }
- static struct nvme_rdma_qe *nvme_rdma_alloc_ring(struct ib_device *ibdev,
- size_t ib_queue_size, size_t capsule_size,
- enum dma_data_direction dir)
- {
- struct nvme_rdma_qe *ring;
- int i;
- ring = kcalloc(ib_queue_size, sizeof(struct nvme_rdma_qe), GFP_KERNEL);
- if (!ring)
- return NULL;
- /*
- * Bind the CQEs (post recv buffers) DMA mapping to the RDMA queue
- * lifetime. It's safe, since any chage in the underlying RDMA device
- * will issue error recovery and queue re-creation.
- */
- for (i = 0; i < ib_queue_size; i++) {
- if (nvme_rdma_alloc_qe(ibdev, &ring[i], capsule_size, dir))
- goto out_free_ring;
- }
- return ring;
- out_free_ring:
- nvme_rdma_free_ring(ibdev, ring, i, capsule_size, dir);
- return NULL;
- }
- static void nvme_rdma_qp_event(struct ib_event *event, void *context)
- {
- pr_debug("QP event %s (%d)\n",
- ib_event_msg(event->event), event->event);
- }
- static int nvme_rdma_wait_for_cm(struct nvme_rdma_queue *queue)
- {
- int ret;
- ret = wait_for_completion_interruptible(&queue->cm_done);
- if (ret)
- return ret;
- WARN_ON_ONCE(queue->cm_error > 0);
- return queue->cm_error;
- }
- static int nvme_rdma_create_qp(struct nvme_rdma_queue *queue, const int factor)
- {
- struct nvme_rdma_device *dev = queue->device;
- struct ib_qp_init_attr init_attr;
- int ret;
- memset(&init_attr, 0, sizeof(init_attr));
- init_attr.event_handler = nvme_rdma_qp_event;
- /* +1 for drain */
- init_attr.cap.max_send_wr = factor * queue->queue_size + 1;
- /* +1 for drain */
- init_attr.cap.max_recv_wr = queue->queue_size + 1;
- init_attr.cap.max_recv_sge = 1;
- init_attr.cap.max_send_sge = 1 + dev->num_inline_segments;
- init_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
- init_attr.qp_type = IB_QPT_RC;
- init_attr.send_cq = queue->ib_cq;
- init_attr.recv_cq = queue->ib_cq;
- if (queue->pi_support)
- init_attr.create_flags |= IB_QP_CREATE_INTEGRITY_EN;
- init_attr.qp_context = queue;
- ret = rdma_create_qp(queue->cm_id, dev->pd, &init_attr);
- queue->qp = queue->cm_id->qp;
- return ret;
- }
- static void nvme_rdma_exit_request(struct blk_mq_tag_set *set,
- struct request *rq, unsigned int hctx_idx)
- {
- struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
- kfree(req->sqe.data);
- }
- static int nvme_rdma_init_request(struct blk_mq_tag_set *set,
- struct request *rq, unsigned int hctx_idx,
- unsigned int numa_node)
- {
- struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(set->driver_data);
- struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
- int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0;
- struct nvme_rdma_queue *queue = &ctrl->queues[queue_idx];
- nvme_req(rq)->ctrl = &ctrl->ctrl;
- req->sqe.data = kzalloc(sizeof(struct nvme_command), GFP_KERNEL);
- if (!req->sqe.data)
- return -ENOMEM;
- /* metadata nvme_rdma_sgl struct is located after command's data SGL */
- if (queue->pi_support)
- req->metadata_sgl = (void *)nvme_req(rq) +
- sizeof(struct nvme_rdma_request) +
- NVME_RDMA_DATA_SGL_SIZE;
- req->queue = queue;
- nvme_req(rq)->cmd = req->sqe.data;
- return 0;
- }
- static int nvme_rdma_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,
- unsigned int hctx_idx)
- {
- struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(data);
- struct nvme_rdma_queue *queue = &ctrl->queues[hctx_idx + 1];
- BUG_ON(hctx_idx >= ctrl->ctrl.queue_count);
- hctx->driver_data = queue;
- return 0;
- }
- static int nvme_rdma_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data,
- unsigned int hctx_idx)
- {
- struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(data);
- struct nvme_rdma_queue *queue = &ctrl->queues[0];
- BUG_ON(hctx_idx != 0);
- hctx->driver_data = queue;
- return 0;
- }
- static void nvme_rdma_free_dev(struct kref *ref)
- {
- struct nvme_rdma_device *ndev =
- container_of(ref, struct nvme_rdma_device, ref);
- mutex_lock(&device_list_mutex);
- list_del(&ndev->entry);
- mutex_unlock(&device_list_mutex);
- ib_dealloc_pd(ndev->pd);
- kfree(ndev);
- }
- static void nvme_rdma_dev_put(struct nvme_rdma_device *dev)
- {
- kref_put(&dev->ref, nvme_rdma_free_dev);
- }
- static int nvme_rdma_dev_get(struct nvme_rdma_device *dev)
- {
- return kref_get_unless_zero(&dev->ref);
- }
- static struct nvme_rdma_device *
- nvme_rdma_find_get_device(struct rdma_cm_id *cm_id)
- {
- struct nvme_rdma_device *ndev;
- mutex_lock(&device_list_mutex);
- list_for_each_entry(ndev, &device_list, entry) {
- if (ndev->dev->node_guid == cm_id->device->node_guid &&
- nvme_rdma_dev_get(ndev))
- goto out_unlock;
- }
- ndev = kzalloc(sizeof(*ndev), GFP_KERNEL);
- if (!ndev)
- goto out_err;
- ndev->dev = cm_id->device;
- kref_init(&ndev->ref);
- ndev->pd = ib_alloc_pd(ndev->dev,
- register_always ? 0 : IB_PD_UNSAFE_GLOBAL_RKEY);
- if (IS_ERR(ndev->pd))
- goto out_free_dev;
- if (!(ndev->dev->attrs.device_cap_flags &
- IB_DEVICE_MEM_MGT_EXTENSIONS)) {
- dev_err(&ndev->dev->dev,
- "Memory registrations not supported.\n");
- goto out_free_pd;
- }
- ndev->num_inline_segments = min(NVME_RDMA_MAX_INLINE_SEGMENTS,
- ndev->dev->attrs.max_send_sge - 1);
- list_add(&ndev->entry, &device_list);
- out_unlock:
- mutex_unlock(&device_list_mutex);
- return ndev;
- out_free_pd:
- ib_dealloc_pd(ndev->pd);
- out_free_dev:
- kfree(ndev);
- out_err:
- mutex_unlock(&device_list_mutex);
- return NULL;
- }
- static void nvme_rdma_free_cq(struct nvme_rdma_queue *queue)
- {
- if (nvme_rdma_poll_queue(queue))
- ib_free_cq(queue->ib_cq);
- else
- ib_cq_pool_put(queue->ib_cq, queue->cq_size);
- }
- static void nvme_rdma_destroy_queue_ib(struct nvme_rdma_queue *queue)
- {
- struct nvme_rdma_device *dev;
- struct ib_device *ibdev;
- if (!test_and_clear_bit(NVME_RDMA_Q_TR_READY, &queue->flags))
- return;
- dev = queue->device;
- ibdev = dev->dev;
- if (queue->pi_support)
- ib_mr_pool_destroy(queue->qp, &queue->qp->sig_mrs);
- ib_mr_pool_destroy(queue->qp, &queue->qp->rdma_mrs);
- /*
- * The cm_id object might have been destroyed during RDMA connection
- * establishment error flow to avoid getting other cma events, thus
- * the destruction of the QP shouldn't use rdma_cm API.
- */
- ib_destroy_qp(queue->qp);
- nvme_rdma_free_cq(queue);
- nvme_rdma_free_ring(ibdev, queue->rsp_ring, queue->queue_size,
- sizeof(struct nvme_completion), DMA_FROM_DEVICE);
- nvme_rdma_dev_put(dev);
- }
- static int nvme_rdma_get_max_fr_pages(struct ib_device *ibdev, bool pi_support)
- {
- u32 max_page_list_len;
- if (pi_support)
- max_page_list_len = ibdev->attrs.max_pi_fast_reg_page_list_len;
- else
- max_page_list_len = ibdev->attrs.max_fast_reg_page_list_len;
- return min_t(u32, NVME_RDMA_MAX_SEGMENTS, max_page_list_len - 1);
- }
- static int nvme_rdma_create_cq(struct ib_device *ibdev,
- struct nvme_rdma_queue *queue)
- {
- int ret, comp_vector, idx = nvme_rdma_queue_idx(queue);
- enum ib_poll_context poll_ctx;
- /*
- * Spread I/O queues completion vectors according their queue index.
- * Admin queues can always go on completion vector 0.
- */
- comp_vector = (idx == 0 ? idx : idx - 1) % ibdev->num_comp_vectors;
- /* Polling queues need direct cq polling context */
- if (nvme_rdma_poll_queue(queue)) {
- poll_ctx = IB_POLL_DIRECT;
- queue->ib_cq = ib_alloc_cq(ibdev, queue, queue->cq_size,
- comp_vector, poll_ctx);
- } else {
- poll_ctx = IB_POLL_SOFTIRQ;
- queue->ib_cq = ib_cq_pool_get(ibdev, queue->cq_size,
- comp_vector, poll_ctx);
- }
- if (IS_ERR(queue->ib_cq)) {
- ret = PTR_ERR(queue->ib_cq);
- return ret;
- }
- return 0;
- }
- static int nvme_rdma_create_queue_ib(struct nvme_rdma_queue *queue)
- {
- struct ib_device *ibdev;
- const int send_wr_factor = 3; /* MR, SEND, INV */
- const int cq_factor = send_wr_factor + 1; /* + RECV */
- int ret, pages_per_mr;
- queue->device = nvme_rdma_find_get_device(queue->cm_id);
- if (!queue->device) {
- dev_err(queue->cm_id->device->dev.parent,
- "no client data found!\n");
- return -ECONNREFUSED;
- }
- ibdev = queue->device->dev;
- /* +1 for ib_stop_cq */
- queue->cq_size = cq_factor * queue->queue_size + 1;
- ret = nvme_rdma_create_cq(ibdev, queue);
- if (ret)
- goto out_put_dev;
- ret = nvme_rdma_create_qp(queue, send_wr_factor);
- if (ret)
- 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;
- }
- /*
- * Currently we don't use SG_GAPS MR's so if the first entry is
- * misaligned we'll end up using two entries for a single data page,
- * so one additional entry is required.
- */
- pages_per_mr = nvme_rdma_get_max_fr_pages(ibdev, queue->pi_support) + 1;
- ret = ib_mr_pool_init(queue->qp, &queue->qp->rdma_mrs,
- queue->queue_size,
- IB_MR_TYPE_MEM_REG,
- pages_per_mr, 0);
- if (ret) {
- dev_err(queue->ctrl->ctrl.device,
- "failed to initialize MR pool sized %d for QID %d\n",
- queue->queue_size, nvme_rdma_queue_idx(queue));
- goto out_destroy_ring;
- }
- if (queue->pi_support) {
- ret = ib_mr_pool_init(queue->qp, &queue->qp->sig_mrs,
- queue->queue_size, IB_MR_TYPE_INTEGRITY,
- pages_per_mr, pages_per_mr);
- if (ret) {
- dev_err(queue->ctrl->ctrl.device,
- "failed to initialize PI MR pool sized %d for QID %d\n",
- queue->queue_size, nvme_rdma_queue_idx(queue));
- goto out_destroy_mr_pool;
- }
- }
- set_bit(NVME_RDMA_Q_TR_READY, &queue->flags);
- return 0;
- out_destroy_mr_pool:
- ib_mr_pool_destroy(queue->qp, &queue->qp->rdma_mrs);
- out_destroy_ring:
- nvme_rdma_free_ring(ibdev, queue->rsp_ring, queue->queue_size,
- sizeof(struct nvme_completion), DMA_FROM_DEVICE);
- out_destroy_qp:
- rdma_destroy_qp(queue->cm_id);
- out_destroy_ib_cq:
- nvme_rdma_free_cq(queue);
- 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];
- mutex_init(&queue->queue_lock);
- queue->ctrl = ctrl;
- if (idx && ctrl->ctrl.max_integrity_segments)
- queue->pi_support = true;
- else
- queue->pi_support = false;
- 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;
- 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));
- ret = PTR_ERR(queue->cm_id);
- goto out_destroy_mutex;
- }
- 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_CM_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);
- nvme_rdma_destroy_queue_ib(queue);
- out_destroy_mutex:
- mutex_destroy(&queue->queue_lock);
- return ret;
- }
- static void __nvme_rdma_stop_queue(struct nvme_rdma_queue *queue)
- {
- rdma_disconnect(queue->cm_id);
- ib_drain_qp(queue->qp);
- }
- static void nvme_rdma_stop_queue(struct nvme_rdma_queue *queue)
- {
- if (!test_bit(NVME_RDMA_Q_ALLOCATED, &queue->flags))
- return;
- mutex_lock(&queue->queue_lock);
- if (test_and_clear_bit(NVME_RDMA_Q_LIVE, &queue->flags))
- __nvme_rdma_stop_queue(queue);
- mutex_unlock(&queue->queue_lock);
- }
- static void nvme_rdma_free_queue(struct nvme_rdma_queue *queue)
- {
- if (!test_and_clear_bit(NVME_RDMA_Q_ALLOCATED, &queue->flags))
- return;
- rdma_destroy_id(queue->cm_id);
- nvme_rdma_destroy_queue_ib(queue);
- mutex_destroy(&queue->queue_lock);
- }
- 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)
- {
- struct nvme_rdma_queue *queue = &ctrl->queues[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, &queue->flags);
- } else {
- if (test_bit(NVME_RDMA_Q_ALLOCATED, &queue->flags))
- __nvme_rdma_stop_queue(queue);
- 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 first, int last)
- {
- int i, ret = 0;
- for (i = first; i < last; i++) {
- ret = nvme_rdma_start_queue(ctrl, i);
- if (ret)
- goto out_stop_queues;
- }
- return 0;
- out_stop_queues:
- for (i--; i >= first; 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, nr_default_queues;
- unsigned int nr_read_queues, nr_poll_queues;
- int i, ret;
- nr_read_queues = min_t(unsigned int, ibdev->num_comp_vectors,
- min(opts->nr_io_queues, num_online_cpus()));
- nr_default_queues = min_t(unsigned int, ibdev->num_comp_vectors,
- min(opts->nr_write_queues, num_online_cpus()));
- nr_poll_queues = min(opts->nr_poll_queues, num_online_cpus());
- nr_io_queues = nr_read_queues + nr_default_queues + nr_poll_queues;
- ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues);
- if (ret)
- return ret;
- if (nr_io_queues == 0) {
- dev_err(ctrl->ctrl.device,
- "unable to set any I/O queues\n");
- return -ENOMEM;
- }
- ctrl->ctrl.queue_count = nr_io_queues + 1;
- dev_info(ctrl->ctrl.device,
- "creating %d I/O queues.\n", nr_io_queues);
- if (opts->nr_write_queues && nr_read_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] = nr_read_queues;
- nr_io_queues -= ctrl->io_queues[HCTX_TYPE_READ];
- ctrl->io_queues[HCTX_TYPE_DEFAULT] =
- min(nr_default_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(nr_read_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(nr_poll_queues, 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 int nvme_rdma_alloc_tag_set(struct nvme_ctrl *ctrl)
- {
- unsigned int cmd_size = sizeof(struct nvme_rdma_request) +
- NVME_RDMA_DATA_SGL_SIZE;
- if (ctrl->max_integrity_segments)
- cmd_size += sizeof(struct nvme_rdma_sgl) +
- NVME_RDMA_METADATA_SGL_SIZE;
- return nvme_alloc_io_tag_set(ctrl, &to_rdma_ctrl(ctrl)->tag_set,
- &nvme_rdma_mq_ops,
- ctrl->opts->nr_poll_queues ? HCTX_MAX_TYPES : 2,
- cmd_size);
- }
- static void nvme_rdma_destroy_admin_queue(struct nvme_rdma_ctrl *ctrl)
- {
- if (ctrl->async_event_sqe.data) {
- cancel_work_sync(&ctrl->ctrl.async_event_work);
- nvme_rdma_free_qe(ctrl->device->dev, &ctrl->async_event_sqe,
- sizeof(struct nvme_command), DMA_TO_DEVICE);
- ctrl->async_event_sqe.data = NULL;
- }
- nvme_rdma_free_queue(&ctrl->queues[0]);
- }
- static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
- bool new)
- {
- bool pi_capable = false;
- int error;
- error = nvme_rdma_alloc_queue(ctrl, 0, NVME_AQ_DEPTH);
- if (error)
- return error;
- ctrl->device = ctrl->queues[0].device;
- ctrl->ctrl.numa_node = ibdev_to_node(ctrl->device->dev);
- /* T10-PI support */
- if (ctrl->device->dev->attrs.kernel_cap_flags &
- IBK_INTEGRITY_HANDOVER)
- pi_capable = true;
- ctrl->max_fr_pages = nvme_rdma_get_max_fr_pages(ctrl->device->dev,
- pi_capable);
- /*
- * Bind the async event SQE DMA mapping to the admin queue lifetime.
- * It's safe, since any chage in the underlying RDMA device will issue
- * error recovery and queue re-creation.
- */
- error = nvme_rdma_alloc_qe(ctrl->device->dev, &ctrl->async_event_sqe,
- sizeof(struct nvme_command), DMA_TO_DEVICE);
- if (error)
- goto out_free_queue;
- if (new) {
- error = nvme_alloc_admin_tag_set(&ctrl->ctrl,
- &ctrl->admin_tag_set, &nvme_rdma_admin_mq_ops,
- sizeof(struct nvme_rdma_request) +
- NVME_RDMA_DATA_SGL_SIZE);
- if (error)
- goto out_free_async_qe;
- }
- error = nvme_rdma_start_queue(ctrl, 0);
- if (error)
- goto out_remove_admin_tag_set;
- error = nvme_enable_ctrl(&ctrl->ctrl);
- if (error)
- goto out_stop_queue;
- ctrl->ctrl.max_segments = ctrl->max_fr_pages;
- ctrl->ctrl.max_hw_sectors = ctrl->max_fr_pages << (ilog2(SZ_4K) - 9);
- if (pi_capable)
- ctrl->ctrl.max_integrity_segments = ctrl->max_fr_pages;
- else
- ctrl->ctrl.max_integrity_segments = 0;
- nvme_start_admin_queue(&ctrl->ctrl);
- error = nvme_init_ctrl_finish(&ctrl->ctrl);
- if (error)
- goto out_quiesce_queue;
- return 0;
- out_quiesce_queue:
- nvme_stop_admin_queue(&ctrl->ctrl);
- blk_sync_queue(ctrl->ctrl.admin_q);
- out_stop_queue:
- nvme_rdma_stop_queue(&ctrl->queues[0]);
- nvme_cancel_admin_tagset(&ctrl->ctrl);
- out_remove_admin_tag_set:
- if (new)
- nvme_remove_admin_tag_set(&ctrl->ctrl);
- out_free_async_qe:
- if (ctrl->async_event_sqe.data) {
- nvme_rdma_free_qe(ctrl->device->dev, &ctrl->async_event_sqe,
- sizeof(struct nvme_command), DMA_TO_DEVICE);
- ctrl->async_event_sqe.data = NULL;
- }
- out_free_queue:
- nvme_rdma_free_queue(&ctrl->queues[0]);
- return error;
- }
- static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
- {
- int ret, nr_queues;
- ret = nvme_rdma_alloc_io_queues(ctrl);
- if (ret)
- return ret;
- if (new) {
- ret = nvme_rdma_alloc_tag_set(&ctrl->ctrl);
- if (ret)
- goto out_free_io_queues;
- }
- /*
- * Only start IO queues for which we have allocated the tagset
- * and limitted it to the available queues. On reconnects, the
- * queue number might have changed.
- */
- nr_queues = min(ctrl->tag_set.nr_hw_queues + 1, ctrl->ctrl.queue_count);
- ret = nvme_rdma_start_io_queues(ctrl, 1, nr_queues);
- if (ret)
- goto out_cleanup_tagset;
- if (!new) {
- nvme_start_freeze(&ctrl->ctrl);
- nvme_start_queues(&ctrl->ctrl);
- if (!nvme_wait_freeze_timeout(&ctrl->ctrl, NVME_IO_TIMEOUT)) {
- /*
- * If we timed out waiting for freeze we are likely to
- * be stuck. Fail the controller initialization just
- * to be safe.
- */
- ret = -ENODEV;
- nvme_unfreeze(&ctrl->ctrl);
- goto out_wait_freeze_timed_out;
- }
- blk_mq_update_nr_hw_queues(ctrl->ctrl.tagset,
- ctrl->ctrl.queue_count - 1);
- nvme_unfreeze(&ctrl->ctrl);
- }
- /*
- * If the number of queues has increased (reconnect case)
- * start all new queues now.
- */
- ret = nvme_rdma_start_io_queues(ctrl, nr_queues,
- ctrl->tag_set.nr_hw_queues + 1);
- if (ret)
- goto out_wait_freeze_timed_out;
- return 0;
- out_wait_freeze_timed_out:
- nvme_stop_queues(&ctrl->ctrl);
- nvme_sync_io_queues(&ctrl->ctrl);
- nvme_rdma_stop_io_queues(ctrl);
- out_cleanup_tagset:
- nvme_cancel_tagset(&ctrl->ctrl);
- if (new)
- nvme_remove_io_tag_set(&ctrl->ctrl);
- out_free_io_queues:
- nvme_rdma_free_io_queues(ctrl);
- return ret;
- }
- static void nvme_rdma_teardown_admin_queue(struct nvme_rdma_ctrl *ctrl,
- bool remove)
- {
- nvme_stop_admin_queue(&ctrl->ctrl);
- blk_sync_queue(ctrl->ctrl.admin_q);
- nvme_rdma_stop_queue(&ctrl->queues[0]);
- nvme_cancel_admin_tagset(&ctrl->ctrl);
- if (remove) {
- nvme_start_admin_queue(&ctrl->ctrl);
- nvme_remove_admin_tag_set(&ctrl->ctrl);
- }
- nvme_rdma_destroy_admin_queue(ctrl);
- }
- static void nvme_rdma_teardown_io_queues(struct nvme_rdma_ctrl *ctrl,
- bool remove)
- {
- if (ctrl->ctrl.queue_count > 1) {
- nvme_stop_queues(&ctrl->ctrl);
- nvme_sync_io_queues(&ctrl->ctrl);
- nvme_rdma_stop_io_queues(ctrl);
- nvme_cancel_tagset(&ctrl->ctrl);
- if (remove) {
- nvme_start_queues(&ctrl->ctrl);
- nvme_remove_io_tag_set(&ctrl->ctrl);
- }
- nvme_rdma_free_io_queues(ctrl);
- }
- }
- static void nvme_rdma_stop_ctrl(struct nvme_ctrl *nctrl)
- {
- struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
- flush_work(&ctrl->err_work);
- cancel_delayed_work_sync(&ctrl->reconnect_work);
- }
- 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);
- nvmf_free_options(nctrl->opts);
- free_ctrl:
- kfree(ctrl->queues);
- 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_CONNECTING) {
- 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 {
- nvme_delete_ctrl(&ctrl->ctrl);
- }
- }
- static int nvme_rdma_setup_ctrl(struct nvme_rdma_ctrl *ctrl, bool new)
- {
- int ret;
- bool changed;
- ret = nvme_rdma_configure_admin_queue(ctrl, new);
- if (ret)
- return ret;
- if (ctrl->ctrl.icdoff) {
- ret = -EOPNOTSUPP;
- dev_err(ctrl->ctrl.device, "icdoff is not supported!\n");
- goto destroy_admin;
- }
- if (!(ctrl->ctrl.sgls & (1 << 2))) {
- ret = -EOPNOTSUPP;
- dev_err(ctrl->ctrl.device,
- "Mandatory keyed sgls are not supported!\n");
- goto destroy_admin;
- }
- if (ctrl->ctrl.opts->queue_size > ctrl->ctrl.sqsize + 1) {
- dev_warn(ctrl->ctrl.device,
- "queue_size %zu > ctrl sqsize %u, clamping down\n",
- ctrl->ctrl.opts->queue_size, ctrl->ctrl.sqsize + 1);
- }
- if (ctrl->ctrl.sqsize + 1 > NVME_RDMA_MAX_QUEUE_SIZE) {
- dev_warn(ctrl->ctrl.device,
- "ctrl sqsize %u > max queue size %u, clamping down\n",
- ctrl->ctrl.sqsize + 1, NVME_RDMA_MAX_QUEUE_SIZE);
- ctrl->ctrl.sqsize = NVME_RDMA_MAX_QUEUE_SIZE - 1;
- }
- if (ctrl->ctrl.sqsize + 1 > ctrl->ctrl.maxcmd) {
- dev_warn(ctrl->ctrl.device,
- "sqsize %u > ctrl maxcmd %u, clamping down\n",
- ctrl->ctrl.sqsize + 1, ctrl->ctrl.maxcmd);
- ctrl->ctrl.sqsize = ctrl->ctrl.maxcmd - 1;
- }
- if (ctrl->ctrl.sgls & (1 << 20))
- ctrl->use_inline_data = true;
- if (ctrl->ctrl.queue_count > 1) {
- ret = nvme_rdma_configure_io_queues(ctrl, new);
- if (ret)
- goto destroy_admin;
- }
- changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
- if (!changed) {
- /*
- * 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(ctrl->ctrl.state != NVME_CTRL_DELETING &&
- ctrl->ctrl.state != NVME_CTRL_DELETING_NOIO);
- WARN_ON_ONCE(new);
- ret = -EINVAL;
- goto destroy_io;
- }
- nvme_start_ctrl(&ctrl->ctrl);
- return 0;
- destroy_io:
- if (ctrl->ctrl.queue_count > 1) {
- nvme_stop_queues(&ctrl->ctrl);
- nvme_sync_io_queues(&ctrl->ctrl);
- nvme_rdma_stop_io_queues(ctrl);
- nvme_cancel_tagset(&ctrl->ctrl);
- if (new)
- nvme_remove_io_tag_set(&ctrl->ctrl);
- nvme_rdma_free_io_queues(ctrl);
- }
- destroy_admin:
- nvme_stop_admin_queue(&ctrl->ctrl);
- blk_sync_queue(ctrl->ctrl.admin_q);
- nvme_rdma_stop_queue(&ctrl->queues[0]);
- nvme_cancel_admin_tagset(&ctrl->ctrl);
- if (new)
- nvme_remove_admin_tag_set(&ctrl->ctrl);
- nvme_rdma_destroy_admin_queue(ctrl);
- return ret;
- }
- 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);
- ++ctrl->ctrl.nr_reconnects;
- if (nvme_rdma_setup_ctrl(ctrl, false))
- goto requeue;
- dev_info(ctrl->ctrl.device, "Successfully reconnected (%d attempts)\n",
- ctrl->ctrl.nr_reconnects);
- ctrl->ctrl.nr_reconnects = 0;
- return;
- 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);
- flush_work(&ctrl->ctrl.async_event_work);
- nvme_rdma_teardown_io_queues(ctrl, false);
- nvme_start_queues(&ctrl->ctrl);
- nvme_rdma_teardown_admin_queue(ctrl, false);
- nvme_start_admin_queue(&ctrl->ctrl);
- nvme_auth_stop(&ctrl->ctrl);
- if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) {
- /* state change failure is ok if we started ctrl delete */
- WARN_ON_ONCE(ctrl->ctrl.state != NVME_CTRL_DELETING &&
- ctrl->ctrl.state != NVME_CTRL_DELETING_NOIO);
- return;
- }
- 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_RESETTING))
- return;
- dev_warn(ctrl->ctrl.device, "starting error recovery\n");
- queue_work(nvme_reset_wq, &ctrl->err_work);
- }
- static void nvme_rdma_end_request(struct nvme_rdma_request *req)
- {
- struct request *rq = blk_mq_rq_from_pdu(req);
- if (!refcount_dec_and_test(&req->ref))
- return;
- if (!nvme_try_complete_req(rq, req->status, req->result))
- nvme_rdma_complete_rq(rq);
- }
- static void nvme_rdma_wr_error(struct ib_cq *cq, struct ib_wc *wc,
- const char *op)
- {
- struct nvme_rdma_queue *queue = wc->qp->qp_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)
- {
- struct nvme_rdma_request *req =
- container_of(wc->wr_cqe, struct nvme_rdma_request, reg_cqe);
- if (unlikely(wc->status != IB_WC_SUCCESS))
- nvme_rdma_wr_error(cq, wc, "LOCAL_INV");
- else
- nvme_rdma_end_request(req);
- }
- static int nvme_rdma_inv_rkey(struct nvme_rdma_queue *queue,
- struct nvme_rdma_request *req)
- {
- struct ib_send_wr wr = {
- .opcode = IB_WR_LOCAL_INV,
- .next = NULL,
- .num_sge = 0,
- .send_flags = IB_SEND_SIGNALED,
- .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, NULL);
- }
- static void nvme_rdma_dma_unmap_req(struct ib_device *ibdev, struct request *rq)
- {
- struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
- if (blk_integrity_rq(rq)) {
- ib_dma_unmap_sg(ibdev, req->metadata_sgl->sg_table.sgl,
- req->metadata_sgl->nents, rq_dma_dir(rq));
- sg_free_table_chained(&req->metadata_sgl->sg_table,
- NVME_INLINE_METADATA_SG_CNT);
- }
- ib_dma_unmap_sg(ibdev, req->data_sgl.sg_table.sgl, req->data_sgl.nents,
- rq_dma_dir(rq));
- sg_free_table_chained(&req->data_sgl.sg_table, NVME_INLINE_SG_CNT);
- }
- 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_device *dev = queue->device;
- struct ib_device *ibdev = dev->dev;
- struct list_head *pool = &queue->qp->rdma_mrs;
- if (!blk_rq_nr_phys_segments(rq))
- return;
- if (req->use_sig_mr)
- pool = &queue->qp->sig_mrs;
- if (req->mr) {
- ib_mr_pool_put(queue->qp, pool, req->mr);
- req->mr = NULL;
- }
- nvme_rdma_dma_unmap_req(ibdev, rq);
- }
- 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,
- int count)
- {
- struct nvme_sgl_desc *sg = &c->common.dptr.sgl;
- struct ib_sge *sge = &req->sge[1];
- struct scatterlist *sgl;
- u32 len = 0;
- int i;
- for_each_sg(req->data_sgl.sg_table.sgl, sgl, count, i) {
- sge->addr = sg_dma_address(sgl);
- sge->length = sg_dma_len(sgl);
- sge->lkey = queue->device->pd->local_dma_lkey;
- len += sge->length;
- sge++;
- }
- sg->addr = cpu_to_le64(queue->ctrl->ctrl.icdoff);
- sg->length = cpu_to_le32(len);
- sg->type = (NVME_SGL_FMT_DATA_DESC << 4) | NVME_SGL_FMT_OFFSET;
- req->num_sge += count;
- 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->data_sgl.sg_table.sgl));
- put_unaligned_le24(sg_dma_len(req->data_sgl.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;
- req->mr = ib_mr_pool_get(queue->qp, &queue->qp->rdma_mrs);
- if (WARN_ON_ONCE(!req->mr))
- return -EAGAIN;
- /*
- * 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->data_sgl.sg_table.sgl, count, NULL,
- SZ_4K);
- if (unlikely(nr < count)) {
- ib_mr_pool_put(queue->qp, &queue->qp->rdma_mrs, req->mr);
- req->mr = NULL;
- 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;
- 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 void nvme_rdma_set_sig_domain(struct blk_integrity *bi,
- struct nvme_command *cmd, struct ib_sig_domain *domain,
- u16 control, u8 pi_type)
- {
- domain->sig_type = IB_SIG_TYPE_T10_DIF;
- domain->sig.dif.bg_type = IB_T10DIF_CRC;
- domain->sig.dif.pi_interval = 1 << bi->interval_exp;
- domain->sig.dif.ref_tag = le32_to_cpu(cmd->rw.reftag);
- if (control & NVME_RW_PRINFO_PRCHK_REF)
- domain->sig.dif.ref_remap = true;
- domain->sig.dif.app_tag = le16_to_cpu(cmd->rw.apptag);
- domain->sig.dif.apptag_check_mask = le16_to_cpu(cmd->rw.appmask);
- domain->sig.dif.app_escape = true;
- if (pi_type == NVME_NS_DPS_PI_TYPE3)
- domain->sig.dif.ref_escape = true;
- }
- static void nvme_rdma_set_sig_attrs(struct blk_integrity *bi,
- struct nvme_command *cmd, struct ib_sig_attrs *sig_attrs,
- u8 pi_type)
- {
- u16 control = le16_to_cpu(cmd->rw.control);
- memset(sig_attrs, 0, sizeof(*sig_attrs));
- if (control & NVME_RW_PRINFO_PRACT) {
- /* for WRITE_INSERT/READ_STRIP no memory domain */
- sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE;
- nvme_rdma_set_sig_domain(bi, cmd, &sig_attrs->wire, control,
- pi_type);
- /* Clear the PRACT bit since HCA will generate/verify the PI */
- control &= ~NVME_RW_PRINFO_PRACT;
- cmd->rw.control = cpu_to_le16(control);
- } else {
- /* for WRITE_PASS/READ_PASS both wire/memory domains exist */
- nvme_rdma_set_sig_domain(bi, cmd, &sig_attrs->wire, control,
- pi_type);
- nvme_rdma_set_sig_domain(bi, cmd, &sig_attrs->mem, control,
- pi_type);
- }
- }
- static void nvme_rdma_set_prot_checks(struct nvme_command *cmd, u8 *mask)
- {
- *mask = 0;
- if (le16_to_cpu(cmd->rw.control) & NVME_RW_PRINFO_PRCHK_REF)
- *mask |= IB_SIG_CHECK_REFTAG;
- if (le16_to_cpu(cmd->rw.control) & NVME_RW_PRINFO_PRCHK_GUARD)
- *mask |= IB_SIG_CHECK_GUARD;
- }
- static void nvme_rdma_sig_done(struct ib_cq *cq, struct ib_wc *wc)
- {
- if (unlikely(wc->status != IB_WC_SUCCESS))
- nvme_rdma_wr_error(cq, wc, "SIG");
- }
- static int nvme_rdma_map_sg_pi(struct nvme_rdma_queue *queue,
- struct nvme_rdma_request *req, struct nvme_command *c,
- int count, int pi_count)
- {
- struct nvme_rdma_sgl *sgl = &req->data_sgl;
- struct ib_reg_wr *wr = &req->reg_wr;
- struct request *rq = blk_mq_rq_from_pdu(req);
- struct nvme_ns *ns = rq->q->queuedata;
- struct bio *bio = rq->bio;
- struct nvme_keyed_sgl_desc *sg = &c->common.dptr.ksgl;
- int nr;
- req->mr = ib_mr_pool_get(queue->qp, &queue->qp->sig_mrs);
- if (WARN_ON_ONCE(!req->mr))
- return -EAGAIN;
- nr = ib_map_mr_sg_pi(req->mr, sgl->sg_table.sgl, count, NULL,
- req->metadata_sgl->sg_table.sgl, pi_count, NULL,
- SZ_4K);
- if (unlikely(nr))
- goto mr_put;
- nvme_rdma_set_sig_attrs(blk_get_integrity(bio->bi_bdev->bd_disk), c,
- req->mr->sig_attrs, ns->pi_type);
- nvme_rdma_set_prot_checks(c, &req->mr->sig_attrs->check_mask);
- ib_update_fast_reg_key(req->mr, ib_inc_rkey(req->mr->rkey));
- req->reg_cqe.done = nvme_rdma_sig_done;
- memset(wr, 0, sizeof(*wr));
- wr->wr.opcode = IB_WR_REG_MR_INTEGRITY;
- wr->wr.wr_cqe = &req->reg_cqe;
- wr->wr.num_sge = 0;
- wr->wr.send_flags = 0;
- wr->mr = req->mr;
- wr->key = req->mr->rkey;
- wr->access = IB_ACCESS_LOCAL_WRITE |
- IB_ACCESS_REMOTE_READ |
- IB_ACCESS_REMOTE_WRITE;
- 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;
- return 0;
- mr_put:
- ib_mr_pool_put(queue->qp, &queue->qp->sig_mrs, req->mr);
- req->mr = NULL;
- if (nr < 0)
- return nr;
- return -EINVAL;
- }
- static int nvme_rdma_dma_map_req(struct ib_device *ibdev, struct request *rq,
- int *count, int *pi_count)
- {
- struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
- int ret;
- req->data_sgl.sg_table.sgl = (struct scatterlist *)(req + 1);
- ret = sg_alloc_table_chained(&req->data_sgl.sg_table,
- blk_rq_nr_phys_segments(rq), req->data_sgl.sg_table.sgl,
- NVME_INLINE_SG_CNT);
- if (ret)
- return -ENOMEM;
- req->data_sgl.nents = blk_rq_map_sg(rq->q, rq,
- req->data_sgl.sg_table.sgl);
- *count = ib_dma_map_sg(ibdev, req->data_sgl.sg_table.sgl,
- req->data_sgl.nents, rq_dma_dir(rq));
- if (unlikely(*count <= 0)) {
- ret = -EIO;
- goto out_free_table;
- }
- if (blk_integrity_rq(rq)) {
- req->metadata_sgl->sg_table.sgl =
- (struct scatterlist *)(req->metadata_sgl + 1);
- ret = sg_alloc_table_chained(&req->metadata_sgl->sg_table,
- blk_rq_count_integrity_sg(rq->q, rq->bio),
- req->metadata_sgl->sg_table.sgl,
- NVME_INLINE_METADATA_SG_CNT);
- if (unlikely(ret)) {
- ret = -ENOMEM;
- goto out_unmap_sg;
- }
- req->metadata_sgl->nents = blk_rq_map_integrity_sg(rq->q,
- rq->bio, req->metadata_sgl->sg_table.sgl);
- *pi_count = ib_dma_map_sg(ibdev,
- req->metadata_sgl->sg_table.sgl,
- req->metadata_sgl->nents,
- rq_dma_dir(rq));
- if (unlikely(*pi_count <= 0)) {
- ret = -EIO;
- goto out_free_pi_table;
- }
- }
- return 0;
- out_free_pi_table:
- sg_free_table_chained(&req->metadata_sgl->sg_table,
- NVME_INLINE_METADATA_SG_CNT);
- out_unmap_sg:
- ib_dma_unmap_sg(ibdev, req->data_sgl.sg_table.sgl, req->data_sgl.nents,
- rq_dma_dir(rq));
- out_free_table:
- sg_free_table_chained(&req->data_sgl.sg_table, NVME_INLINE_SG_CNT);
- return ret;
- }
- 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 pi_count = 0;
- int count, ret;
- req->num_sge = 1;
- refcount_set(&req->ref, 2); /* send and recv completions */
- c->common.flags |= NVME_CMD_SGL_METABUF;
- if (!blk_rq_nr_phys_segments(rq))
- return nvme_rdma_set_sg_null(c);
- ret = nvme_rdma_dma_map_req(ibdev, rq, &count, &pi_count);
- if (unlikely(ret))
- return ret;
- if (req->use_sig_mr) {
- ret = nvme_rdma_map_sg_pi(queue, req, c, count, pi_count);
- goto out;
- }
- if (count <= dev->num_inline_segments) {
- if (rq_data_dir(rq) == WRITE && nvme_rdma_queue_idx(queue) &&
- queue->ctrl->use_inline_data &&
- blk_rq_payload_bytes(rq) <=
- nvme_rdma_inline_data_size(queue)) {
- ret = nvme_rdma_map_sg_inline(queue, req, c, count);
- goto out;
- }
- if (count == 1 && dev->pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
- ret = nvme_rdma_map_sg_single(queue, req, c);
- goto out;
- }
- }
- ret = nvme_rdma_map_sg_fr(queue, req, c, count);
- out:
- if (unlikely(ret))
- goto out_dma_unmap_req;
- return 0;
- out_dma_unmap_req:
- nvme_rdma_dma_unmap_req(ibdev, rq);
- return ret;
- }
- static void nvme_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc)
- {
- struct nvme_rdma_qe *qe =
- container_of(wc->wr_cqe, struct nvme_rdma_qe, cqe);
- struct nvme_rdma_request *req =
- container_of(qe, struct nvme_rdma_request, sqe);
- if (unlikely(wc->status != IB_WC_SUCCESS))
- nvme_rdma_wr_error(cq, wc, "SEND");
- else
- nvme_rdma_end_request(req);
- }
- 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)
- {
- struct ib_send_wr wr;
- int ret;
- sge->addr = qe->dma;
- sge->length = sizeof(struct nvme_command);
- sge->lkey = queue->device->pd->local_dma_lkey;
- 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 = IB_SEND_SIGNALED;
- if (first)
- first->next = ≀
- else
- first = ≀
- ret = ib_post_send(queue->qp, first, NULL);
- 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;
- 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, NULL);
- 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_async_done(struct ib_cq *cq, struct ib_wc *wc)
- {
- if (unlikely(wc->status != IB_WC_SUCCESS))
- nvme_rdma_wr_error(cq, wc, "ASYNC");
- }
- static void nvme_rdma_submit_async_event(struct nvme_ctrl *arg)
- {
- 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;
- 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_AQ_BLK_MQ_DEPTH;
- cmd->common.flags |= NVME_CMD_SGL_METABUF;
- nvme_rdma_set_sg_null(cmd);
- sqe->cqe.done = nvme_rdma_async_done;
- ib_dma_sync_single_for_device(dev, sqe->dma, sizeof(*cmd),
- DMA_TO_DEVICE);
- ret = nvme_rdma_post_send(queue, sqe, &sge, 1, NULL);
- WARN_ON_ONCE(ret);
- }
- static void nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue,
- struct nvme_completion *cqe, struct ib_wc *wc)
- {
- struct request *rq;
- struct nvme_rdma_request *req;
- rq = nvme_find_rq(nvme_rdma_tagset(queue), cqe->command_id);
- if (!rq) {
- dev_err(queue->ctrl->ctrl.device,
- "got bad command_id %#x on QP %#x\n",
- cqe->command_id, queue->qp->qp_num);
- nvme_rdma_error_recovery(queue->ctrl);
- return;
- }
- req = blk_mq_rq_to_pdu(rq);
- req->status = cqe->status;
- req->result = cqe->result;
- if (wc->wc_flags & IB_WC_WITH_INVALIDATE) {
- if (unlikely(!req->mr ||
- wc->ex.invalidate_rkey != req->mr->rkey)) {
- dev_err(queue->ctrl->ctrl.device,
- "Bogus remote invalidation for rkey %#x\n",
- req->mr ? req->mr->rkey : 0);
- nvme_rdma_error_recovery(queue->ctrl);
- }
- } else if (req->mr) {
- int ret;
- ret = nvme_rdma_inv_rkey(queue, req);
- if (unlikely(ret < 0)) {
- dev_err(queue->ctrl->ctrl.device,
- "Queueing INV WR for rkey %#x failed (%d)\n",
- req->mr->rkey, ret);
- nvme_rdma_error_recovery(queue->ctrl);
- }
- /* the local invalidation completion will end the request */
- return;
- }
- nvme_rdma_end_request(req);
- }
- static void nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc)
- {
- struct nvme_rdma_qe *qe =
- container_of(wc->wr_cqe, struct nvme_rdma_qe, cqe);
- struct nvme_rdma_queue *queue = wc->qp->qp_context;
- struct ib_device *ibdev = queue->device->dev;
- struct nvme_completion *cqe = qe->data;
- const size_t len = sizeof(struct nvme_completion);
- if (unlikely(wc->status != IB_WC_SUCCESS)) {
- nvme_rdma_wr_error(cq, wc, "RECV");
- return;
- }
- /* sanity checking for received data length */
- if (unlikely(wc->byte_len < len)) {
- dev_err(queue->ctrl->ctrl.device,
- "Unexpected nvme completion length(%d)\n", wc->byte_len);
- nvme_rdma_error_recovery(queue->ctrl);
- return;
- }
- 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_is_aen_req(nvme_rdma_queue_idx(queue),
- cqe->command_id)))
- nvme_complete_async_event(&queue->ctrl->ctrl, cqe->status,
- &cqe->result);
- else
- nvme_rdma_process_nvme_rsp(queue, cqe, wc);
- ib_dma_sync_single_for_device(ibdev, qe->dma, len, DMA_FROM_DEVICE);
- nvme_rdma_post_recv(queue, qe);
- }
- 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)
- return ret;
- }
- return 0;
- }
- 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)
- {
- struct nvme_ctrl *ctrl = &queue->ctrl->ctrl;
- int ret;
- ret = nvme_rdma_create_queue_ib(queue);
- if (ret)
- return ret;
- if (ctrl->opts->tos >= 0)
- rdma_set_service_type(queue->cm_id, ctrl->opts->tos);
- ret = rdma_resolve_route(queue->cm_id, NVME_RDMA_CM_TIMEOUT_MS);
- if (ret) {
- dev_err(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_locked(queue->cm_id, ¶m);
- if (ret) {
- dev_err(ctrl->ctrl.device,
- "rdma_connect_locked failed (%d).\n", ret);
- return ret;
- }
- return 0;
- }
- 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:
- 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:
- 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 void nvme_rdma_complete_timed_out(struct request *rq)
- {
- struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
- struct nvme_rdma_queue *queue = req->queue;
- nvme_rdma_stop_queue(queue);
- nvmf_complete_timed_out_request(rq);
- }
- static enum blk_eh_timer_return nvme_rdma_timeout(struct request *rq)
- {
- struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
- struct nvme_rdma_queue *queue = req->queue;
- struct nvme_rdma_ctrl *ctrl = queue->ctrl;
- dev_warn(ctrl->ctrl.device, "I/O %d QID %d timeout\n",
- rq->tag, nvme_rdma_queue_idx(queue));
- if (ctrl->ctrl.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_rdma_complete_timed_out(rq);
- return BLK_EH_DONE;
- }
- /*
- * LIVE state should trigger the normal error recovery which will
- * handle completing this request.
- */
- nvme_rdma_error_recovery(ctrl);
- return BLK_EH_RESET_TIMER;
- }
- 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 = nvme_req(rq)->cmd;
- struct ib_device *dev;
- bool queue_ready = test_bit(NVME_RDMA_Q_LIVE, &queue->flags);
- blk_status_t ret;
- int err;
- WARN_ON_ONCE(rq->tag < 0);
- if (!nvme_check_ready(&queue->ctrl->ctrl, rq, queue_ready))
- return nvme_fail_nonready_command(&queue->ctrl->ctrl, rq);
- dev = queue->device->dev;
- req->sqe.dma = ib_dma_map_single(dev, req->sqe.data,
- sizeof(struct nvme_command),
- DMA_TO_DEVICE);
- err = ib_dma_mapping_error(dev, req->sqe.dma);
- if (unlikely(err))
- return BLK_STS_RESOURCE;
- ib_dma_sync_single_for_cpu(dev, sqe->dma,
- sizeof(struct nvme_command), DMA_TO_DEVICE);
- ret = nvme_setup_cmd(ns, rq);
- if (ret)
- goto unmap_qe;
- blk_mq_start_request(rq);
- if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) &&
- queue->pi_support &&
- (c->common.opcode == nvme_cmd_write ||
- c->common.opcode == nvme_cmd_read) &&
- nvme_ns_has_pi(ns))
- req->use_sig_mr = true;
- else
- req->use_sig_mr = false;
- 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);
- goto err;
- }
- sqe->cqe.done = nvme_rdma_send_done;
- ib_dma_sync_single_for_device(dev, sqe->dma,
- sizeof(struct nvme_command), DMA_TO_DEVICE);
- err = nvme_rdma_post_send(queue, sqe, req->sge, req->num_sge,
- req->mr ? &req->reg_wr.wr : NULL);
- if (unlikely(err))
- goto err_unmap;
- return BLK_STS_OK;
- err_unmap:
- nvme_rdma_unmap_data(queue, rq);
- err:
- if (err == -EIO)
- ret = nvme_host_path_error(rq);
- else if (err == -ENOMEM || err == -EAGAIN)
- ret = BLK_STS_RESOURCE;
- else
- ret = BLK_STS_IOERR;
- nvme_cleanup_cmd(rq);
- unmap_qe:
- ib_dma_unmap_single(dev, req->sqe.dma, sizeof(struct nvme_command),
- DMA_TO_DEVICE);
- return ret;
- }
- static int nvme_rdma_poll(struct blk_mq_hw_ctx *hctx, struct io_comp_batch *iob)
- {
- struct nvme_rdma_queue *queue = hctx->driver_data;
- return ib_process_cq_direct(queue->ib_cq, -1);
- }
- static void nvme_rdma_check_pi_status(struct nvme_rdma_request *req)
- {
- struct request *rq = blk_mq_rq_from_pdu(req);
- struct ib_mr_status mr_status;
- int ret;
- ret = ib_check_mr_status(req->mr, IB_MR_CHECK_SIG_STATUS, &mr_status);
- if (ret) {
- pr_err("ib_check_mr_status failed, ret %d\n", ret);
- nvme_req(rq)->status = NVME_SC_INVALID_PI;
- return;
- }
- if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) {
- switch (mr_status.sig_err.err_type) {
- case IB_SIG_BAD_GUARD:
- nvme_req(rq)->status = NVME_SC_GUARD_CHECK;
- break;
- case IB_SIG_BAD_REFTAG:
- nvme_req(rq)->status = NVME_SC_REFTAG_CHECK;
- break;
- case IB_SIG_BAD_APPTAG:
- nvme_req(rq)->status = NVME_SC_APPTAG_CHECK;
- break;
- }
- pr_err("PI error found type %d expected 0x%x vs actual 0x%x\n",
- mr_status.sig_err.err_type, mr_status.sig_err.expected,
- mr_status.sig_err.actual);
- }
- }
- static void nvme_rdma_complete_rq(struct request *rq)
- {
- struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
- struct nvme_rdma_queue *queue = req->queue;
- struct ib_device *ibdev = queue->device->dev;
- if (req->use_sig_mr)
- nvme_rdma_check_pi_status(req);
- nvme_rdma_unmap_data(queue, rq);
- ib_dma_unmap_single(ibdev, req->sqe.dma, sizeof(struct nvme_command),
- DMA_TO_DEVICE);
- nvme_complete_rq(rq);
- }
- static void nvme_rdma_map_queues(struct blk_mq_tag_set *set)
- {
- struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(set->driver_data);
- struct nvmf_ctrl_options *opts = ctrl->ctrl.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_rdma_map_queues(&set->map[HCTX_TYPE_DEFAULT],
- ctrl->device->dev, 0);
- blk_mq_rdma_map_queues(&set->map[HCTX_TYPE_READ],
- ctrl->device->dev, 0);
- 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->ctrl.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]);
- }
- 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,
- .timeout = nvme_rdma_timeout,
- .map_queues = nvme_rdma_map_queues,
- .poll = nvme_rdma_poll,
- };
- 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)
- {
- nvme_rdma_teardown_io_queues(ctrl, shutdown);
- nvme_stop_admin_queue(&ctrl->ctrl);
- if (shutdown)
- nvme_shutdown_ctrl(&ctrl->ctrl);
- else
- nvme_disable_ctrl(&ctrl->ctrl);
- nvme_rdma_teardown_admin_queue(ctrl, shutdown);
- }
- static void nvme_rdma_delete_ctrl(struct nvme_ctrl *ctrl)
- {
- nvme_rdma_shutdown_ctrl(to_rdma_ctrl(ctrl), true);
- }
- 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);
- nvme_stop_ctrl(&ctrl->ctrl);
- nvme_rdma_shutdown_ctrl(ctrl, false);
- if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) {
- /* state change failure should never happen */
- WARN_ON_ONCE(1);
- return;
- }
- if (nvme_rdma_setup_ctrl(ctrl, false))
- goto out_fail;
- return;
- out_fail:
- ++ctrl->ctrl.nr_reconnects;
- nvme_rdma_reconnect_or_remove(ctrl);
- }
- static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {
- .name = "rdma",
- .module = THIS_MODULE,
- .flags = NVME_F_FABRICS | NVME_F_METADATA_SUPPORTED,
- .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_delete_ctrl,
- .get_address = nvmf_get_address,
- .stop_ctrl = nvme_rdma_stop_ctrl,
- };
- /*
- * Fails a connection request if it matches an existing controller
- * (association) with the same tuple:
- * <Host NQN, Host ID, local address, remote address, remote port, SUBSYS NQN>
- *
- * if local address is not specified in the request, it will match an
- * existing controller with all the other parameters the same and no
- * local port address specified as well.
- *
- * The ports don't need to be compared as they are intrinsically
- * already matched by the port pointers supplied.
- */
- static bool
- nvme_rdma_existing_controller(struct nvmf_ctrl_options *opts)
- {
- struct nvme_rdma_ctrl *ctrl;
- bool found = false;
- mutex_lock(&nvme_rdma_ctrl_mutex);
- list_for_each_entry(ctrl, &nvme_rdma_ctrl_list, list) {
- found = nvmf_ip_options_match(&ctrl->ctrl, opts);
- if (found)
- break;
- }
- mutex_unlock(&nvme_rdma_ctrl_mutex);
- return found;
- }
- 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;
- 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)) {
- opts->trsvcid =
- kstrdup(__stringify(NVME_RDMA_IP_PORT), GFP_KERNEL);
- if (!opts->trsvcid) {
- ret = -ENOMEM;
- goto out_free_ctrl;
- }
- opts->mask |= NVMF_OPT_TRSVCID;
- }
- ret = inet_pton_with_scope(&init_net, AF_UNSPEC,
- opts->traddr, opts->trsvcid, &ctrl->addr);
- if (ret) {
- pr_err("malformed address passed: %s:%s\n",
- opts->traddr, opts->trsvcid);
- 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;
- }
- }
- if (!opts->duplicate_connect && nvme_rdma_existing_controller(opts)) {
- ret = -EALREADY;
- 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->ctrl.reset_work, nvme_rdma_reset_ctrl_work);
- ctrl->ctrl.queue_count = opts->nr_io_queues + opts->nr_write_queues +
- opts->nr_poll_queues + 1;
- 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_free_ctrl;
- ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_rdma_ctrl_ops,
- 0 /* no quirks, we're perfect! */);
- if (ret)
- goto out_kfree_queues;
- changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING);
- WARN_ON_ONCE(!changed);
- ret = nvme_rdma_setup_ctrl(ctrl, true);
- if (ret)
- goto out_uninit_ctrl;
- dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISpcs\n",
- nvmf_ctrl_subsysnqn(&ctrl->ctrl), &ctrl->addr);
- mutex_lock(&nvme_rdma_ctrl_mutex);
- list_add_tail(&ctrl->list, &nvme_rdma_ctrl_list);
- mutex_unlock(&nvme_rdma_ctrl_mutex);
- return &ctrl->ctrl;
- out_uninit_ctrl:
- nvme_uninit_ctrl(&ctrl->ctrl);
- nvme_put_ctrl(&ctrl->ctrl);
- if (ret > 0)
- ret = -EIO;
- return ERR_PTR(ret);
- out_kfree_queues:
- kfree(ctrl->queues);
- out_free_ctrl:
- kfree(ctrl);
- return ERR_PTR(ret);
- }
- static struct nvmf_transport_ops nvme_rdma_transport = {
- .name = "rdma",
- .module = THIS_MODULE,
- .required_opts = NVMF_OPT_TRADDR,
- .allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY |
- NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO |
- NVMF_OPT_NR_WRITE_QUEUES | NVMF_OPT_NR_POLL_QUEUES |
- NVMF_OPT_TOS,
- .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;
- struct nvme_rdma_device *ndev;
- bool found = false;
- mutex_lock(&device_list_mutex);
- list_for_each_entry(ndev, &device_list, entry) {
- if (ndev->dev == ib_device) {
- found = true;
- break;
- }
- }
- mutex_unlock(&device_list_mutex);
- if (!found)
- return;
- /* 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;
- nvme_delete_ctrl(&ctrl->ctrl);
- }
- mutex_unlock(&nvme_rdma_ctrl_mutex);
- flush_workqueue(nvme_delete_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)
- {
- struct nvme_rdma_ctrl *ctrl;
- nvmf_unregister_transport(&nvme_rdma_transport);
- ib_unregister_client(&nvme_rdma_ib_client);
- mutex_lock(&nvme_rdma_ctrl_mutex);
- list_for_each_entry(ctrl, &nvme_rdma_ctrl_list, list)
- nvme_delete_ctrl(&ctrl->ctrl);
- mutex_unlock(&nvme_rdma_ctrl_mutex);
- flush_workqueue(nvme_delete_wq);
- }
- module_init(nvme_rdma_init_module);
- module_exit(nvme_rdma_cleanup_module);
- MODULE_LICENSE("GPL v2");
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