From 9a6327d2f25b14cb568ca2c55ccbc8f00aa400e4 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Wed, 7 Jun 2017 20:31:55 +0200 Subject: [PATCH] nvme: Move transports to use nvme-core workqueue Instead of each transport using it's own workqueue, export a single nvme-core workqueue and use that instead. In the future, this will help us moving towards some unification if controller setup/teardown flows. Signed-off-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/host/core.c | 15 +++++++++++++-- drivers/nvme/host/fc.c | 28 ++++++---------------------- drivers/nvme/host/nvme.h | 2 ++ drivers/nvme/host/pci.c | 18 +++--------------- drivers/nvme/host/rdma.c | 25 ++++++++----------------- drivers/nvme/target/loop.c | 8 ++++---- 6 files changed, 36 insertions(+), 60 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 6d53094f4b8e..9a7fcad62d81 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -65,6 +65,9 @@ static bool force_apst; module_param(force_apst, bool, 0644); MODULE_PARM_DESC(force_apst, "allow APST for newly enumerated devices even if quirked off"); +struct workqueue_struct *nvme_wq; +EXPORT_SYMBOL_GPL(nvme_wq); + static LIST_HEAD(nvme_ctrl_list); static DEFINE_SPINLOCK(dev_list_lock); @@ -2538,10 +2541,15 @@ int __init nvme_core_init(void) { int result; + nvme_wq = alloc_workqueue("nvme-wq", + WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); + if (!nvme_wq) + return -ENOMEM; + result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", &nvme_dev_fops); if (result < 0) - return result; + goto destroy_wq; else if (result > 0) nvme_char_major = result; @@ -2553,8 +2561,10 @@ int __init nvme_core_init(void) return 0; - unregister_chrdev: +unregister_chrdev: __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); +destroy_wq: + destroy_workqueue(nvme_wq); return result; } @@ -2562,6 +2572,7 @@ void nvme_core_exit(void) { class_destroy(nvme_class); __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); + destroy_workqueue(nvme_wq); } MODULE_LICENSE("GPL"); diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index 1df653ae3638..e6084f3b365f 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -214,7 +214,6 @@ static LIST_HEAD(nvme_fc_lport_list); static DEFINE_IDA(nvme_fc_local_port_cnt); static DEFINE_IDA(nvme_fc_ctrl_cnt); -static struct workqueue_struct *nvme_fc_wq; @@ -1775,7 +1774,7 @@ nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) return; } - if (!queue_work(nvme_fc_wq, &ctrl->reset_work)) + if (!queue_work(nvme_wq, &ctrl->reset_work)) dev_err(ctrl->ctrl.device, "NVME-FC{%d}: error_recovery: Failed to schedule " "reset work\n", ctrl->cnum); @@ -2555,7 +2554,7 @@ __nvme_fc_schedule_delete_work(struct nvme_fc_ctrl *ctrl) if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING)) return true; - if (!queue_work(nvme_fc_wq, &ctrl->delete_work)) + if (!queue_work(nvme_wq, &ctrl->delete_work)) return true; return false; @@ -2582,7 +2581,7 @@ nvme_fc_del_nvme_ctrl(struct nvme_ctrl *nctrl) ret = __nvme_fc_del_ctrl(ctrl); if (!ret) - flush_workqueue(nvme_fc_wq); + flush_workqueue(nvme_wq); nvme_put_ctrl(&ctrl->ctrl); @@ -2607,7 +2606,7 @@ nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) dev_info(ctrl->ctrl.device, "NVME-FC{%d}: Reconnect attempt in %d seconds.\n", ctrl->cnum, ctrl->ctrl.opts->reconnect_delay); - queue_delayed_work(nvme_fc_wq, &ctrl->connect_work, + queue_delayed_work(nvme_wq, &ctrl->connect_work, ctrl->ctrl.opts->reconnect_delay * HZ); } else { dev_warn(ctrl->ctrl.device, @@ -2651,7 +2650,7 @@ nvme_fc_reset_nvme_ctrl(struct nvme_ctrl *nctrl) if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING)) return -EBUSY; - if (!queue_work(nvme_fc_wq, &ctrl->reset_work)) + if (!queue_work(nvme_wq, &ctrl->reset_work)) return -EBUSY; flush_work(&ctrl->reset_work); @@ -2966,20 +2965,7 @@ static struct nvmf_transport_ops nvme_fc_transport = { static int __init nvme_fc_init_module(void) { - int ret; - - nvme_fc_wq = create_workqueue("nvme_fc_wq"); - if (!nvme_fc_wq) - return -ENOMEM; - - ret = nvmf_register_transport(&nvme_fc_transport); - if (ret) - goto err; - - return 0; -err: - destroy_workqueue(nvme_fc_wq); - return ret; + return nvmf_register_transport(&nvme_fc_transport); } static void __exit nvme_fc_exit_module(void) @@ -2990,8 +2976,6 @@ static void __exit nvme_fc_exit_module(void) nvmf_unregister_transport(&nvme_fc_transport); - destroy_workqueue(nvme_fc_wq); - ida_destroy(&nvme_fc_local_port_cnt); ida_destroy(&nvme_fc_ctrl_cnt); } diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index e2e341bba619..80e9adce2691 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -33,6 +33,8 @@ extern unsigned char shutdown_timeout; #define NVME_DEFAULT_KATO 5 #define NVME_KATO_GRACE 10 +extern struct workqueue_struct *nvme_wq; + enum { NVME_NS_LBA = 0, NVME_NS_LIGHTNVM = 1, diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 73d9b412f291..ebd5cdfc0174 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -71,8 +71,6 @@ module_param(max_host_mem_size_mb, uint, 0444); MODULE_PARM_DESC(max_host_mem_size_mb, "Maximum Host Memory Buffer (HMB) size per controller (in MiB)"); -static struct workqueue_struct *nvme_workq; - struct nvme_dev; struct nvme_queue; @@ -2190,7 +2188,7 @@ static int nvme_reset(struct nvme_dev *dev) return -ENODEV; if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RESETTING)) return -EBUSY; - if (!queue_work(nvme_workq, &dev->reset_work)) + if (!queue_work(nvme_wq, &dev->reset_work)) return -EBUSY; return 0; } @@ -2318,7 +2316,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RESETTING); dev_info(dev->ctrl.device, "pci function %s\n", dev_name(&pdev->dev)); - queue_work(nvme_workq, &dev->reset_work); + queue_work(nvme_wq, &dev->reset_work); return 0; release_pools: @@ -2506,22 +2504,12 @@ static struct pci_driver nvme_driver = { static int __init nvme_init(void) { - int result; - - nvme_workq = alloc_workqueue("nvme", WQ_UNBOUND | WQ_MEM_RECLAIM, 0); - if (!nvme_workq) - return -ENOMEM; - - result = pci_register_driver(&nvme_driver); - if (result) - destroy_workqueue(nvme_workq); - return result; + return pci_register_driver(&nvme_driver); } static void __exit nvme_exit(void) { pci_unregister_driver(&nvme_driver); - destroy_workqueue(nvme_workq); _nvme_check_size(); } diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 17dddaf4ca3f..8805d3400846 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -140,8 +140,6 @@ static DEFINE_MUTEX(device_list_mutex); static LIST_HEAD(nvme_rdma_ctrl_list); static DEFINE_MUTEX(nvme_rdma_ctrl_mutex); -static struct workqueue_struct *nvme_rdma_wq; - /* * 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 @@ -712,11 +710,11 @@ static void nvme_rdma_reconnect_or_remove(struct nvme_rdma_ctrl *ctrl) 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_rdma_wq, &ctrl->reconnect_work, + 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_rdma_wq, &ctrl->delete_work); + queue_work(nvme_wq, &ctrl->delete_work); } } @@ -825,7 +823,7 @@ 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_rdma_wq, &ctrl->err_work); + queue_work(nvme_wq, &ctrl->err_work); } static void nvme_rdma_wr_error(struct ib_cq *cq, struct ib_wc *wc, @@ -1692,7 +1690,7 @@ 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_rdma_wq, &ctrl->delete_work)) + if (!queue_work(nvme_wq, &ctrl->delete_work)) return -EBUSY; return 0; @@ -1768,7 +1766,7 @@ static void nvme_rdma_reset_ctrl_work(struct work_struct *work) del_dead_ctrl: /* Deleting this dead controller... */ dev_warn(ctrl->ctrl.device, "Removing after reset failure\n"); - WARN_ON(!queue_work(nvme_rdma_wq, &ctrl->delete_work)); + WARN_ON(!queue_work(nvme_wq, &ctrl->delete_work)); } static int nvme_rdma_reset_ctrl(struct nvme_ctrl *nctrl) @@ -1778,7 +1776,7 @@ static int nvme_rdma_reset_ctrl(struct nvme_ctrl *nctrl) if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING)) return -EBUSY; - if (!queue_work(nvme_rdma_wq, &ctrl->reset_work)) + if (!queue_work(nvme_wq, &ctrl->reset_work)) return -EBUSY; flush_work(&ctrl->reset_work); @@ -2015,7 +2013,7 @@ static void nvme_rdma_remove_one(struct ib_device *ib_device, void *client_data) } mutex_unlock(&nvme_rdma_ctrl_mutex); - flush_workqueue(nvme_rdma_wq); + flush_workqueue(nvme_wq); } static struct ib_client nvme_rdma_ib_client = { @@ -2028,13 +2026,9 @@ static int __init nvme_rdma_init_module(void) { int ret; - nvme_rdma_wq = create_workqueue("nvme_rdma_wq"); - if (!nvme_rdma_wq) - return -ENOMEM; - ret = ib_register_client(&nvme_rdma_ib_client); if (ret) - goto err_destroy_wq; + return ret; ret = nvmf_register_transport(&nvme_rdma_transport); if (ret) @@ -2044,8 +2038,6 @@ static int __init nvme_rdma_init_module(void) err_unreg_client: ib_unregister_client(&nvme_rdma_ib_client); -err_destroy_wq: - destroy_workqueue(nvme_rdma_wq); return ret; } @@ -2053,7 +2045,6 @@ static void __exit nvme_rdma_cleanup_module(void) { nvmf_unregister_transport(&nvme_rdma_transport); ib_unregister_client(&nvme_rdma_ib_client); - destroy_workqueue(nvme_rdma_wq); } module_init(nvme_rdma_init_module); diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c index 1f5bd3cd5041..b7715b46e021 100644 --- a/drivers/nvme/target/loop.c +++ b/drivers/nvme/target/loop.c @@ -150,7 +150,7 @@ nvme_loop_timeout(struct request *rq, bool reserved) struct nvme_loop_iod *iod = blk_mq_rq_to_pdu(rq); /* queue error recovery */ - schedule_work(&iod->queue->ctrl->reset_work); + queue_work(nvme_wq, &iod->queue->ctrl->reset_work); /* fail with DNR on admin cmd timeout */ nvme_req(rq)->status = NVME_SC_ABORT_REQ | NVME_SC_DNR; @@ -465,7 +465,7 @@ static int __nvme_loop_del_ctrl(struct nvme_loop_ctrl *ctrl) if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING)) return -EBUSY; - if (!schedule_work(&ctrl->delete_work)) + if (!queue_work(nvme_wq, &ctrl->delete_work)) return -EBUSY; return 0; @@ -545,7 +545,7 @@ static int nvme_loop_reset_ctrl(struct nvme_ctrl *nctrl) if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING)) return -EBUSY; - if (!schedule_work(&ctrl->reset_work)) + if (!queue_work(nvme_wq, &ctrl->reset_work)) return -EBUSY; flush_work(&ctrl->reset_work); @@ -762,7 +762,7 @@ static void __exit nvme_loop_cleanup_module(void) __nvme_loop_del_ctrl(ctrl); mutex_unlock(&nvme_loop_ctrl_mutex); - flush_scheduled_work(); + flush_workqueue(nvme_wq); } module_init(nvme_loop_init_module); -- 2.20.1