18638b246SChristoph Hellwig // SPDX-License-Identifier: GPL-2.0 2e399441dSJames Smart /* 3e399441dSJames Smart * Copyright (c) 2016 Avago Technologies. All rights reserved. 4e399441dSJames Smart */ 5e399441dSJames Smart #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 6e399441dSJames Smart #include <linux/module.h> 7e399441dSJames Smart #include <linux/parser.h> 8e399441dSJames Smart #include <uapi/scsi/fc/fc_fs.h> 9e399441dSJames Smart #include <uapi/scsi/fc/fc_els.h> 1061bff8efSJames Smart #include <linux/delay.h> 11d3d0bc78SBart Van Assche #include <linux/overflow.h> 12e399441dSJames Smart 13e399441dSJames Smart #include "nvme.h" 14e399441dSJames Smart #include "fabrics.h" 15e399441dSJames Smart #include <linux/nvme-fc-driver.h> 16e399441dSJames Smart #include <linux/nvme-fc.h> 17ca19bcd0SJames Smart #include "fc.h" 18a6a6d058SHannes Reinecke #include <scsi/scsi_transport_fc.h> 19e399441dSJames Smart 20e399441dSJames Smart /* *************************** Data Structures/Defines ****************** */ 21e399441dSJames Smart 22e399441dSJames Smart 23e399441dSJames Smart enum nvme_fc_queue_flags { 2426c0a26dSJens Axboe NVME_FC_Q_CONNECTED = 0, 2526c0a26dSJens Axboe NVME_FC_Q_LIVE, 26e399441dSJames Smart }; 27e399441dSJames Smart 28ac7fe82bSJames Smart #define NVME_FC_DEFAULT_DEV_LOSS_TMO 60 /* seconds */ 29f673714aSJames Smart #define NVME_FC_DEFAULT_RECONNECT_TMO 2 /* delay between reconnects 30f673714aSJames Smart * when connected and a 31f673714aSJames Smart * connection failure. 32f673714aSJames Smart */ 33ac7fe82bSJames Smart 34e399441dSJames Smart struct nvme_fc_queue { 35e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 36e399441dSJames Smart struct device *dev; 37e399441dSJames Smart struct blk_mq_hw_ctx *hctx; 38e399441dSJames Smart void *lldd_handle; 39e399441dSJames Smart size_t cmnd_capsule_len; 40e399441dSJames Smart u32 qnum; 41e399441dSJames Smart u32 rqcnt; 42e399441dSJames Smart u32 seqno; 43e399441dSJames Smart 44e399441dSJames Smart u64 connection_id; 45e399441dSJames Smart atomic_t csn; 46e399441dSJames Smart 47e399441dSJames Smart unsigned long flags; 48e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 49e399441dSJames Smart 508d64daf7SJames Smart enum nvme_fcop_flags { 518d64daf7SJames Smart FCOP_FLAGS_TERMIO = (1 << 0), 52c3aedd22SJames Smart FCOP_FLAGS_AEN = (1 << 1), 538d64daf7SJames Smart }; 548d64daf7SJames Smart 55e399441dSJames Smart struct nvmefc_ls_req_op { 56e399441dSJames Smart struct nvmefc_ls_req ls_req; 57e399441dSJames Smart 58c913a8b0SJames Smart struct nvme_fc_rport *rport; 59e399441dSJames Smart struct nvme_fc_queue *queue; 60e399441dSJames Smart struct request *rq; 618d64daf7SJames Smart u32 flags; 62e399441dSJames Smart 63e399441dSJames Smart int ls_error; 64e399441dSJames Smart struct completion ls_done; 65c913a8b0SJames Smart struct list_head lsreq_list; /* rport->ls_req_list */ 66e399441dSJames Smart bool req_queued; 67e399441dSJames Smart }; 68e399441dSJames Smart 6914fd1e98SJames Smart struct nvmefc_ls_rcv_op { 7014fd1e98SJames Smart struct nvme_fc_rport *rport; 7114fd1e98SJames Smart struct nvmefc_ls_rsp *lsrsp; 7214fd1e98SJames Smart union nvmefc_ls_requests *rqstbuf; 7314fd1e98SJames Smart union nvmefc_ls_responses *rspbuf; 7414fd1e98SJames Smart u16 rqstdatalen; 7514fd1e98SJames Smart bool handled; 7614fd1e98SJames Smart dma_addr_t rspdma; 7714fd1e98SJames Smart struct list_head lsrcv_list; /* rport->ls_rcv_list */ 7814fd1e98SJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 7914fd1e98SJames Smart 80e399441dSJames Smart enum nvme_fcpop_state { 81e399441dSJames Smart FCPOP_STATE_UNINIT = 0, 82e399441dSJames Smart FCPOP_STATE_IDLE = 1, 83e399441dSJames Smart FCPOP_STATE_ACTIVE = 2, 84e399441dSJames Smart FCPOP_STATE_ABORTED = 3, 8578a7ac26SJames Smart FCPOP_STATE_COMPLETE = 4, 86e399441dSJames Smart }; 87e399441dSJames Smart 88e399441dSJames Smart struct nvme_fc_fcp_op { 89e399441dSJames Smart struct nvme_request nreq; /* 90e399441dSJames Smart * nvme/host/core.c 91e399441dSJames Smart * requires this to be 92e399441dSJames Smart * the 1st element in the 93e399441dSJames Smart * private structure 94e399441dSJames Smart * associated with the 95e399441dSJames Smart * request. 96e399441dSJames Smart */ 97e399441dSJames Smart struct nvmefc_fcp_req fcp_req; 98e399441dSJames Smart 99e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 100e399441dSJames Smart struct nvme_fc_queue *queue; 101e399441dSJames Smart struct request *rq; 102e399441dSJames Smart 103e399441dSJames Smart atomic_t state; 10478a7ac26SJames Smart u32 flags; 105e399441dSJames Smart u32 rqno; 106e399441dSJames Smart u32 nents; 107e399441dSJames Smart 108e399441dSJames Smart struct nvme_fc_cmd_iu cmd_iu; 109e399441dSJames Smart struct nvme_fc_ersp_iu rsp_iu; 110e399441dSJames Smart }; 111e399441dSJames Smart 112d3d0bc78SBart Van Assche struct nvme_fcp_op_w_sgl { 113d3d0bc78SBart Van Assche struct nvme_fc_fcp_op op; 114b1ae1a23SIsrael Rukshin struct scatterlist sgl[NVME_INLINE_SG_CNT]; 115f1e71d75SGustavo A. R. Silva uint8_t priv[]; 116d3d0bc78SBart Van Assche }; 117d3d0bc78SBart Van Assche 118e399441dSJames Smart struct nvme_fc_lport { 119e399441dSJames Smart struct nvme_fc_local_port localport; 120e399441dSJames Smart 121e399441dSJames Smart struct ida endp_cnt; 122e399441dSJames Smart struct list_head port_list; /* nvme_fc_port_list */ 123e399441dSJames Smart struct list_head endp_list; 124e399441dSJames Smart struct device *dev; /* physical device for dma */ 125e399441dSJames Smart struct nvme_fc_port_template *ops; 126e399441dSJames Smart struct kref ref; 127158bfb88SJames Smart atomic_t act_rport_cnt; 128e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 129e399441dSJames Smart 130e399441dSJames Smart struct nvme_fc_rport { 131e399441dSJames Smart struct nvme_fc_remote_port remoteport; 132e399441dSJames Smart 133e399441dSJames Smart struct list_head endp_list; /* for lport->endp_list */ 134e399441dSJames Smart struct list_head ctrl_list; 135c913a8b0SJames Smart struct list_head ls_req_list; 13614fd1e98SJames Smart struct list_head ls_rcv_list; 13797faec53SJames Smart struct list_head disc_list; 138c913a8b0SJames Smart struct device *dev; /* physical device for dma */ 139c913a8b0SJames Smart struct nvme_fc_lport *lport; 140e399441dSJames Smart spinlock_t lock; 141e399441dSJames Smart struct kref ref; 142158bfb88SJames Smart atomic_t act_ctrl_cnt; 1432b632970SJames Smart unsigned long dev_loss_end; 14414fd1e98SJames Smart struct work_struct lsrcv_work; 145e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 146e399441dSJames Smart 147eb4ee8f1SJames Smart /* fc_ctrl flags values - specified as bit positions */ 148eb4ee8f1SJames Smart #define ASSOC_ACTIVE 0 149caf1cbe3SJames Smart #define ASSOC_FAILED 1 150caf1cbe3SJames Smart #define FCCTRL_TERMIO 2 151e399441dSJames Smart 152e399441dSJames Smart struct nvme_fc_ctrl { 153e399441dSJames Smart spinlock_t lock; 154e399441dSJames Smart struct nvme_fc_queue *queues; 155e399441dSJames Smart struct device *dev; 156e399441dSJames Smart struct nvme_fc_lport *lport; 157e399441dSJames Smart struct nvme_fc_rport *rport; 158e399441dSJames Smart u32 cnum; 159e399441dSJames Smart 1604c984154SJames Smart bool ioq_live; 161e399441dSJames Smart u64 association_id; 16214fd1e98SJames Smart struct nvmefc_ls_rcv_op *rcv_disconn; 163e399441dSJames Smart 164e399441dSJames Smart struct list_head ctrl_list; /* rport->ctrl_list */ 165e399441dSJames Smart 166e399441dSJames Smart struct blk_mq_tag_set admin_tag_set; 167e399441dSJames Smart struct blk_mq_tag_set tag_set; 168e399441dSJames Smart 16919fce047SJames Smart struct work_struct ioerr_work; 17061bff8efSJames Smart struct delayed_work connect_work; 17161bff8efSJames Smart 172e399441dSJames Smart struct kref ref; 173eb4ee8f1SJames Smart unsigned long flags; 17461bff8efSJames Smart u32 iocnt; 17536715cf4SJames Smart wait_queue_head_t ioabort_wait; 176e399441dSJames Smart 17738dabe21SKeith Busch struct nvme_fc_fcp_op aen_ops[NVME_NR_AEN_COMMANDS]; 178e399441dSJames Smart 179e399441dSJames Smart struct nvme_ctrl ctrl; 180e399441dSJames Smart }; 181e399441dSJames Smart 182e399441dSJames Smart static inline struct nvme_fc_ctrl * 183e399441dSJames Smart to_fc_ctrl(struct nvme_ctrl *ctrl) 184e399441dSJames Smart { 185e399441dSJames Smart return container_of(ctrl, struct nvme_fc_ctrl, ctrl); 186e399441dSJames Smart } 187e399441dSJames Smart 188e399441dSJames Smart static inline struct nvme_fc_lport * 189e399441dSJames Smart localport_to_lport(struct nvme_fc_local_port *portptr) 190e399441dSJames Smart { 191e399441dSJames Smart return container_of(portptr, struct nvme_fc_lport, localport); 192e399441dSJames Smart } 193e399441dSJames Smart 194e399441dSJames Smart static inline struct nvme_fc_rport * 195e399441dSJames Smart remoteport_to_rport(struct nvme_fc_remote_port *portptr) 196e399441dSJames Smart { 197e399441dSJames Smart return container_of(portptr, struct nvme_fc_rport, remoteport); 198e399441dSJames Smart } 199e399441dSJames Smart 200e399441dSJames Smart static inline struct nvmefc_ls_req_op * 201e399441dSJames Smart ls_req_to_lsop(struct nvmefc_ls_req *lsreq) 202e399441dSJames Smart { 203e399441dSJames Smart return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); 204e399441dSJames Smart } 205e399441dSJames Smart 206e399441dSJames Smart static inline struct nvme_fc_fcp_op * 207e399441dSJames Smart fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) 208e399441dSJames Smart { 209e399441dSJames Smart return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); 210e399441dSJames Smart } 211e399441dSJames Smart 212e399441dSJames Smart 213e399441dSJames Smart 214e399441dSJames Smart /* *************************** Globals **************************** */ 215e399441dSJames Smart 216e399441dSJames Smart 217e399441dSJames Smart static DEFINE_SPINLOCK(nvme_fc_lock); 218e399441dSJames Smart 219e399441dSJames Smart static LIST_HEAD(nvme_fc_lport_list); 220e399441dSJames Smart static DEFINE_IDA(nvme_fc_local_port_cnt); 221e399441dSJames Smart static DEFINE_IDA(nvme_fc_ctrl_cnt); 222e399441dSJames Smart 2238730c1ddSHannes Reinecke static struct workqueue_struct *nvme_fc_wq; 224e399441dSJames Smart 2254c73cbdfSJames Smart static bool nvme_fc_waiting_to_unload; 2264c73cbdfSJames Smart static DECLARE_COMPLETION(nvme_fc_unload_proceed); 2274c73cbdfSJames Smart 2285f568556SJames Smart /* 2295f568556SJames Smart * These items are short-term. They will eventually be moved into 2305f568556SJames Smart * a generic FC class. See comments in module init. 2315f568556SJames Smart */ 2325f568556SJames Smart static struct device *fc_udev_device; 2335f568556SJames Smart 234ff029451SChristoph Hellwig static void nvme_fc_complete_rq(struct request *rq); 235e399441dSJames Smart 236e399441dSJames Smart /* *********************** FC-NVME Port Management ************************ */ 237e399441dSJames Smart 238e399441dSJames Smart static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, 239e399441dSJames Smart struct nvme_fc_queue *, unsigned int); 240e399441dSJames Smart 24114fd1e98SJames Smart static void nvme_fc_handle_ls_rqst_work(struct work_struct *work); 24214fd1e98SJames Smart 24314fd1e98SJames Smart 2445533d424SJames Smart static void 2455533d424SJames Smart nvme_fc_free_lport(struct kref *ref) 2465533d424SJames Smart { 2475533d424SJames Smart struct nvme_fc_lport *lport = 2485533d424SJames Smart container_of(ref, struct nvme_fc_lport, ref); 2495533d424SJames Smart unsigned long flags; 2505533d424SJames Smart 2515533d424SJames Smart WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); 2525533d424SJames Smart WARN_ON(!list_empty(&lport->endp_list)); 2535533d424SJames Smart 2545533d424SJames Smart /* remove from transport list */ 2555533d424SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2565533d424SJames Smart list_del(&lport->port_list); 2574c73cbdfSJames Smart if (nvme_fc_waiting_to_unload && list_empty(&nvme_fc_lport_list)) 2584c73cbdfSJames Smart complete(&nvme_fc_unload_proceed); 2595533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 2605533d424SJames Smart 2615533d424SJames Smart ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); 2625533d424SJames Smart ida_destroy(&lport->endp_cnt); 2635533d424SJames Smart 2645533d424SJames Smart put_device(lport->dev); 2655533d424SJames Smart 2665533d424SJames Smart kfree(lport); 2675533d424SJames Smart } 2685533d424SJames Smart 2695533d424SJames Smart static void 2705533d424SJames Smart nvme_fc_lport_put(struct nvme_fc_lport *lport) 2715533d424SJames Smart { 2725533d424SJames Smart kref_put(&lport->ref, nvme_fc_free_lport); 2735533d424SJames Smart } 2745533d424SJames Smart 2755533d424SJames Smart static int 2765533d424SJames Smart nvme_fc_lport_get(struct nvme_fc_lport *lport) 2775533d424SJames Smart { 2785533d424SJames Smart return kref_get_unless_zero(&lport->ref); 2795533d424SJames Smart } 2805533d424SJames Smart 2815533d424SJames Smart 2825533d424SJames Smart static struct nvme_fc_lport * 283c5760f30SJames Smart nvme_fc_attach_to_unreg_lport(struct nvme_fc_port_info *pinfo, 284c5760f30SJames Smart struct nvme_fc_port_template *ops, 285c5760f30SJames Smart struct device *dev) 2865533d424SJames Smart { 2875533d424SJames Smart struct nvme_fc_lport *lport; 2885533d424SJames Smart unsigned long flags; 2895533d424SJames Smart 2905533d424SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2915533d424SJames Smart 2925533d424SJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 2935533d424SJames Smart if (lport->localport.node_name != pinfo->node_name || 2945533d424SJames Smart lport->localport.port_name != pinfo->port_name) 2955533d424SJames Smart continue; 2965533d424SJames Smart 297c5760f30SJames Smart if (lport->dev != dev) { 298c5760f30SJames Smart lport = ERR_PTR(-EXDEV); 299c5760f30SJames Smart goto out_done; 300c5760f30SJames Smart } 301c5760f30SJames Smart 3025533d424SJames Smart if (lport->localport.port_state != FC_OBJSTATE_DELETED) { 3035533d424SJames Smart lport = ERR_PTR(-EEXIST); 3045533d424SJames Smart goto out_done; 3055533d424SJames Smart } 3065533d424SJames Smart 3075533d424SJames Smart if (!nvme_fc_lport_get(lport)) { 3085533d424SJames Smart /* 3095533d424SJames Smart * fails if ref cnt already 0. If so, 3105533d424SJames Smart * act as if lport already deleted 3115533d424SJames Smart */ 3125533d424SJames Smart lport = NULL; 3135533d424SJames Smart goto out_done; 3145533d424SJames Smart } 3155533d424SJames Smart 3165533d424SJames Smart /* resume the lport */ 3175533d424SJames Smart 318c5760f30SJames Smart lport->ops = ops; 3195533d424SJames Smart lport->localport.port_role = pinfo->port_role; 3205533d424SJames Smart lport->localport.port_id = pinfo->port_id; 3215533d424SJames Smart lport->localport.port_state = FC_OBJSTATE_ONLINE; 3225533d424SJames Smart 3235533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3245533d424SJames Smart 3255533d424SJames Smart return lport; 3265533d424SJames Smart } 3275533d424SJames Smart 3285533d424SJames Smart lport = NULL; 3295533d424SJames Smart 3305533d424SJames Smart out_done: 3315533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3325533d424SJames Smart 3335533d424SJames Smart return lport; 3345533d424SJames Smart } 335e399441dSJames Smart 336e399441dSJames Smart /** 337e399441dSJames Smart * nvme_fc_register_localport - transport entry point called by an 338e399441dSJames Smart * LLDD to register the existence of a NVME 339e399441dSJames Smart * host FC port. 340e399441dSJames Smart * @pinfo: pointer to information about the port to be registered 341e399441dSJames Smart * @template: LLDD entrypoints and operational parameters for the port 342e399441dSJames Smart * @dev: physical hardware device node port corresponds to. Will be 343e399441dSJames Smart * used for DMA mappings 34476c910c7SBart Van Assche * @portptr: pointer to a local port pointer. Upon success, the routine 345e399441dSJames Smart * will allocate a nvme_fc_local_port structure and place its 346e399441dSJames Smart * address in the local port pointer. Upon failure, local port 347e399441dSJames Smart * pointer will be set to 0. 348e399441dSJames Smart * 349e399441dSJames Smart * Returns: 350e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 351e399441dSJames Smart * (ex: -ENXIO) upon failure. 352e399441dSJames Smart */ 353e399441dSJames Smart int 354e399441dSJames Smart nvme_fc_register_localport(struct nvme_fc_port_info *pinfo, 355e399441dSJames Smart struct nvme_fc_port_template *template, 356e399441dSJames Smart struct device *dev, 357e399441dSJames Smart struct nvme_fc_local_port **portptr) 358e399441dSJames Smart { 359e399441dSJames Smart struct nvme_fc_lport *newrec; 360e399441dSJames Smart unsigned long flags; 361e399441dSJames Smart int ret, idx; 362e399441dSJames Smart 363e399441dSJames Smart if (!template->localport_delete || !template->remoteport_delete || 364e399441dSJames Smart !template->ls_req || !template->fcp_io || 365e399441dSJames Smart !template->ls_abort || !template->fcp_abort || 366e399441dSJames Smart !template->max_hw_queues || !template->max_sgl_segments || 3678c5c6605SJames Smart !template->max_dif_sgl_segments || !template->dma_boundary) { 368e399441dSJames Smart ret = -EINVAL; 369e399441dSJames Smart goto out_reghost_failed; 370e399441dSJames Smart } 371e399441dSJames Smart 3725533d424SJames Smart /* 3735533d424SJames Smart * look to see if there is already a localport that had been 3745533d424SJames Smart * deregistered and in the process of waiting for all the 3755533d424SJames Smart * references to fully be removed. If the references haven't 3765533d424SJames Smart * expired, we can simply re-enable the localport. Remoteports 3775533d424SJames Smart * and controller reconnections should resume naturally. 3785533d424SJames Smart */ 379c5760f30SJames Smart newrec = nvme_fc_attach_to_unreg_lport(pinfo, template, dev); 3805533d424SJames Smart 3815533d424SJames Smart /* found an lport, but something about its state is bad */ 3825533d424SJames Smart if (IS_ERR(newrec)) { 3835533d424SJames Smart ret = PTR_ERR(newrec); 3845533d424SJames Smart goto out_reghost_failed; 3855533d424SJames Smart 3865533d424SJames Smart /* found existing lport, which was resumed */ 3875533d424SJames Smart } else if (newrec) { 3885533d424SJames Smart *portptr = &newrec->localport; 3895533d424SJames Smart return 0; 3905533d424SJames Smart } 3915533d424SJames Smart 3925533d424SJames Smart /* nothing found - allocate a new localport struct */ 3935533d424SJames Smart 394e399441dSJames Smart newrec = kmalloc((sizeof(*newrec) + template->local_priv_sz), 395e399441dSJames Smart GFP_KERNEL); 396e399441dSJames Smart if (!newrec) { 397e399441dSJames Smart ret = -ENOMEM; 398e399441dSJames Smart goto out_reghost_failed; 399e399441dSJames Smart } 400e399441dSJames Smart 401e399441dSJames Smart idx = ida_simple_get(&nvme_fc_local_port_cnt, 0, 0, GFP_KERNEL); 402e399441dSJames Smart if (idx < 0) { 403e399441dSJames Smart ret = -ENOSPC; 404e399441dSJames Smart goto out_fail_kfree; 405e399441dSJames Smart } 406e399441dSJames Smart 407e399441dSJames Smart if (!get_device(dev) && dev) { 408e399441dSJames Smart ret = -ENODEV; 409e399441dSJames Smart goto out_ida_put; 410e399441dSJames Smart } 411e399441dSJames Smart 412e399441dSJames Smart INIT_LIST_HEAD(&newrec->port_list); 413e399441dSJames Smart INIT_LIST_HEAD(&newrec->endp_list); 414e399441dSJames Smart kref_init(&newrec->ref); 415158bfb88SJames Smart atomic_set(&newrec->act_rport_cnt, 0); 416e399441dSJames Smart newrec->ops = template; 417e399441dSJames Smart newrec->dev = dev; 418e399441dSJames Smart ida_init(&newrec->endp_cnt); 419f56bf76fSJames Smart if (template->local_priv_sz) 420e399441dSJames Smart newrec->localport.private = &newrec[1]; 421f56bf76fSJames Smart else 422f56bf76fSJames Smart newrec->localport.private = NULL; 423e399441dSJames Smart newrec->localport.node_name = pinfo->node_name; 424e399441dSJames Smart newrec->localport.port_name = pinfo->port_name; 425e399441dSJames Smart newrec->localport.port_role = pinfo->port_role; 426e399441dSJames Smart newrec->localport.port_id = pinfo->port_id; 427e399441dSJames Smart newrec->localport.port_state = FC_OBJSTATE_ONLINE; 428e399441dSJames Smart newrec->localport.port_num = idx; 429e399441dSJames Smart 430e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 431e399441dSJames Smart list_add_tail(&newrec->port_list, &nvme_fc_lport_list); 432e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 433e399441dSJames Smart 434e399441dSJames Smart if (dev) 435e399441dSJames Smart dma_set_seg_boundary(dev, template->dma_boundary); 436e399441dSJames Smart 437e399441dSJames Smart *portptr = &newrec->localport; 438e399441dSJames Smart return 0; 439e399441dSJames Smart 440e399441dSJames Smart out_ida_put: 441e399441dSJames Smart ida_simple_remove(&nvme_fc_local_port_cnt, idx); 442e399441dSJames Smart out_fail_kfree: 443e399441dSJames Smart kfree(newrec); 444e399441dSJames Smart out_reghost_failed: 445e399441dSJames Smart *portptr = NULL; 446e399441dSJames Smart 447e399441dSJames Smart return ret; 448e399441dSJames Smart } 449e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_register_localport); 450e399441dSJames Smart 451e399441dSJames Smart /** 452e399441dSJames Smart * nvme_fc_unregister_localport - transport entry point called by an 453e399441dSJames Smart * LLDD to deregister/remove a previously 454e399441dSJames Smart * registered a NVME host FC port. 45576c910c7SBart Van Assche * @portptr: pointer to the (registered) local port that is to be deregistered. 456e399441dSJames Smart * 457e399441dSJames Smart * Returns: 458e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 459e399441dSJames Smart * (ex: -ENXIO) upon failure. 460e399441dSJames Smart */ 461e399441dSJames Smart int 462e399441dSJames Smart nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) 463e399441dSJames Smart { 464e399441dSJames Smart struct nvme_fc_lport *lport = localport_to_lport(portptr); 465e399441dSJames Smart unsigned long flags; 466e399441dSJames Smart 467e399441dSJames Smart if (!portptr) 468e399441dSJames Smart return -EINVAL; 469e399441dSJames Smart 470e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 471e399441dSJames Smart 472e399441dSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 473e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 474e399441dSJames Smart return -EINVAL; 475e399441dSJames Smart } 476e399441dSJames Smart portptr->port_state = FC_OBJSTATE_DELETED; 477e399441dSJames Smart 478e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 479e399441dSJames Smart 480158bfb88SJames Smart if (atomic_read(&lport->act_rport_cnt) == 0) 481158bfb88SJames Smart lport->ops->localport_delete(&lport->localport); 482158bfb88SJames Smart 483e399441dSJames Smart nvme_fc_lport_put(lport); 484e399441dSJames Smart 485e399441dSJames Smart return 0; 486e399441dSJames Smart } 487e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); 488e399441dSJames Smart 489eaefd5abSJames Smart /* 490eaefd5abSJames Smart * TRADDR strings, per FC-NVME are fixed format: 491eaefd5abSJames Smart * "nn-0x<16hexdigits>:pn-0x<16hexdigits>" - 43 characters 492eaefd5abSJames Smart * udev event will only differ by prefix of what field is 493eaefd5abSJames Smart * being specified: 494eaefd5abSJames Smart * "NVMEFC_HOST_TRADDR=" or "NVMEFC_TRADDR=" - 19 max characters 495eaefd5abSJames Smart * 19 + 43 + null_fudge = 64 characters 496eaefd5abSJames Smart */ 497eaefd5abSJames Smart #define FCNVME_TRADDR_LENGTH 64 498eaefd5abSJames Smart 499eaefd5abSJames Smart static void 500eaefd5abSJames Smart nvme_fc_signal_discovery_scan(struct nvme_fc_lport *lport, 501eaefd5abSJames Smart struct nvme_fc_rport *rport) 502eaefd5abSJames Smart { 503eaefd5abSJames Smart char hostaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_HOST_TRADDR=...*/ 504eaefd5abSJames Smart char tgtaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_TRADDR=...*/ 505eaefd5abSJames Smart char *envp[4] = { "FC_EVENT=nvmediscovery", hostaddr, tgtaddr, NULL }; 506eaefd5abSJames Smart 507eaefd5abSJames Smart if (!(rport->remoteport.port_role & FC_PORT_ROLE_NVME_DISCOVERY)) 508eaefd5abSJames Smart return; 509eaefd5abSJames Smart 510eaefd5abSJames Smart snprintf(hostaddr, sizeof(hostaddr), 511eaefd5abSJames Smart "NVMEFC_HOST_TRADDR=nn-0x%016llx:pn-0x%016llx", 512eaefd5abSJames Smart lport->localport.node_name, lport->localport.port_name); 513eaefd5abSJames Smart snprintf(tgtaddr, sizeof(tgtaddr), 514eaefd5abSJames Smart "NVMEFC_TRADDR=nn-0x%016llx:pn-0x%016llx", 515eaefd5abSJames Smart rport->remoteport.node_name, rport->remoteport.port_name); 516eaefd5abSJames Smart kobject_uevent_env(&fc_udev_device->kobj, KOBJ_CHANGE, envp); 517eaefd5abSJames Smart } 518eaefd5abSJames Smart 519469d0ef0SJames Smart static void 520469d0ef0SJames Smart nvme_fc_free_rport(struct kref *ref) 521469d0ef0SJames Smart { 522469d0ef0SJames Smart struct nvme_fc_rport *rport = 523469d0ef0SJames Smart container_of(ref, struct nvme_fc_rport, ref); 524469d0ef0SJames Smart struct nvme_fc_lport *lport = 525469d0ef0SJames Smart localport_to_lport(rport->remoteport.localport); 526469d0ef0SJames Smart unsigned long flags; 527469d0ef0SJames Smart 528469d0ef0SJames Smart WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); 529469d0ef0SJames Smart WARN_ON(!list_empty(&rport->ctrl_list)); 530469d0ef0SJames Smart 531469d0ef0SJames Smart /* remove from lport list */ 532469d0ef0SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 533469d0ef0SJames Smart list_del(&rport->endp_list); 534469d0ef0SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 535469d0ef0SJames Smart 53697faec53SJames Smart WARN_ON(!list_empty(&rport->disc_list)); 537469d0ef0SJames Smart ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); 538469d0ef0SJames Smart 539469d0ef0SJames Smart kfree(rport); 540469d0ef0SJames Smart 541469d0ef0SJames Smart nvme_fc_lport_put(lport); 542469d0ef0SJames Smart } 543469d0ef0SJames Smart 544469d0ef0SJames Smart static void 545469d0ef0SJames Smart nvme_fc_rport_put(struct nvme_fc_rport *rport) 546469d0ef0SJames Smart { 547469d0ef0SJames Smart kref_put(&rport->ref, nvme_fc_free_rport); 548469d0ef0SJames Smart } 549469d0ef0SJames Smart 550469d0ef0SJames Smart static int 551469d0ef0SJames Smart nvme_fc_rport_get(struct nvme_fc_rport *rport) 552469d0ef0SJames Smart { 553469d0ef0SJames Smart return kref_get_unless_zero(&rport->ref); 554469d0ef0SJames Smart } 555469d0ef0SJames Smart 5562b632970SJames Smart static void 5572b632970SJames Smart nvme_fc_resume_controller(struct nvme_fc_ctrl *ctrl) 5582b632970SJames Smart { 5592b632970SJames Smart switch (ctrl->ctrl.state) { 5602b632970SJames Smart case NVME_CTRL_NEW: 561ad6a0a52SMax Gurtovoy case NVME_CTRL_CONNECTING: 5622b632970SJames Smart /* 5632b632970SJames Smart * As all reconnects were suppressed, schedule a 5642b632970SJames Smart * connect. 5652b632970SJames Smart */ 5662b632970SJames Smart dev_info(ctrl->ctrl.device, 5672b632970SJames Smart "NVME-FC{%d}: connectivity re-established. " 5682b632970SJames Smart "Attempting reconnect\n", ctrl->cnum); 5692b632970SJames Smart 5702b632970SJames Smart queue_delayed_work(nvme_wq, &ctrl->connect_work, 0); 5712b632970SJames Smart break; 5722b632970SJames Smart 5732b632970SJames Smart case NVME_CTRL_RESETTING: 5742b632970SJames Smart /* 5752b632970SJames Smart * Controller is already in the process of terminating the 5762b632970SJames Smart * association. No need to do anything further. The reconnect 5772b632970SJames Smart * step will naturally occur after the reset completes. 5782b632970SJames Smart */ 5792b632970SJames Smart break; 5802b632970SJames Smart 5812b632970SJames Smart default: 5822b632970SJames Smart /* no action to take - let it delete */ 5832b632970SJames Smart break; 5842b632970SJames Smart } 5852b632970SJames Smart } 5862b632970SJames Smart 5872b632970SJames Smart static struct nvme_fc_rport * 5882b632970SJames Smart nvme_fc_attach_to_suspended_rport(struct nvme_fc_lport *lport, 5892b632970SJames Smart struct nvme_fc_port_info *pinfo) 5902b632970SJames Smart { 5912b632970SJames Smart struct nvme_fc_rport *rport; 5922b632970SJames Smart struct nvme_fc_ctrl *ctrl; 5932b632970SJames Smart unsigned long flags; 5942b632970SJames Smart 5952b632970SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 5962b632970SJames Smart 5972b632970SJames Smart list_for_each_entry(rport, &lport->endp_list, endp_list) { 5982b632970SJames Smart if (rport->remoteport.node_name != pinfo->node_name || 5992b632970SJames Smart rport->remoteport.port_name != pinfo->port_name) 6002b632970SJames Smart continue; 6012b632970SJames Smart 6022b632970SJames Smart if (!nvme_fc_rport_get(rport)) { 6032b632970SJames Smart rport = ERR_PTR(-ENOLCK); 6042b632970SJames Smart goto out_done; 6052b632970SJames Smart } 6062b632970SJames Smart 6072b632970SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 6082b632970SJames Smart 6092b632970SJames Smart spin_lock_irqsave(&rport->lock, flags); 6102b632970SJames Smart 6112b632970SJames Smart /* has it been unregistered */ 6122b632970SJames Smart if (rport->remoteport.port_state != FC_OBJSTATE_DELETED) { 6132b632970SJames Smart /* means lldd called us twice */ 6142b632970SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 6152b632970SJames Smart nvme_fc_rport_put(rport); 6162b632970SJames Smart return ERR_PTR(-ESTALE); 6172b632970SJames Smart } 6182b632970SJames Smart 6190cdd5fcaSJames Smart rport->remoteport.port_role = pinfo->port_role; 6200cdd5fcaSJames Smart rport->remoteport.port_id = pinfo->port_id; 6212b632970SJames Smart rport->remoteport.port_state = FC_OBJSTATE_ONLINE; 6222b632970SJames Smart rport->dev_loss_end = 0; 6232b632970SJames Smart 6242b632970SJames Smart /* 6252b632970SJames Smart * kick off a reconnect attempt on all associations to the 6262b632970SJames Smart * remote port. A successful reconnects will resume i/o. 6272b632970SJames Smart */ 6282b632970SJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) 6292b632970SJames Smart nvme_fc_resume_controller(ctrl); 6302b632970SJames Smart 6312b632970SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 6322b632970SJames Smart 6332b632970SJames Smart return rport; 6342b632970SJames Smart } 6352b632970SJames Smart 6362b632970SJames Smart rport = NULL; 6372b632970SJames Smart 6382b632970SJames Smart out_done: 6392b632970SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 6402b632970SJames Smart 6412b632970SJames Smart return rport; 6422b632970SJames Smart } 6432b632970SJames Smart 6442b632970SJames Smart static inline void 6452b632970SJames Smart __nvme_fc_set_dev_loss_tmo(struct nvme_fc_rport *rport, 6462b632970SJames Smart struct nvme_fc_port_info *pinfo) 6472b632970SJames Smart { 6482b632970SJames Smart if (pinfo->dev_loss_tmo) 6492b632970SJames Smart rport->remoteport.dev_loss_tmo = pinfo->dev_loss_tmo; 6502b632970SJames Smart else 6512b632970SJames Smart rport->remoteport.dev_loss_tmo = NVME_FC_DEFAULT_DEV_LOSS_TMO; 6522b632970SJames Smart } 6532b632970SJames Smart 654e399441dSJames Smart /** 655e399441dSJames Smart * nvme_fc_register_remoteport - transport entry point called by an 656e399441dSJames Smart * LLDD to register the existence of a NVME 657e399441dSJames Smart * subsystem FC port on its fabric. 658e399441dSJames Smart * @localport: pointer to the (registered) local port that the remote 659e399441dSJames Smart * subsystem port is connected to. 660e399441dSJames Smart * @pinfo: pointer to information about the port to be registered 66176c910c7SBart Van Assche * @portptr: pointer to a remote port pointer. Upon success, the routine 662e399441dSJames Smart * will allocate a nvme_fc_remote_port structure and place its 663e399441dSJames Smart * address in the remote port pointer. Upon failure, remote port 664e399441dSJames Smart * pointer will be set to 0. 665e399441dSJames Smart * 666e399441dSJames Smart * Returns: 667e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 668e399441dSJames Smart * (ex: -ENXIO) upon failure. 669e399441dSJames Smart */ 670e399441dSJames Smart int 671e399441dSJames Smart nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, 672e399441dSJames Smart struct nvme_fc_port_info *pinfo, 673e399441dSJames Smart struct nvme_fc_remote_port **portptr) 674e399441dSJames Smart { 675e399441dSJames Smart struct nvme_fc_lport *lport = localport_to_lport(localport); 676e399441dSJames Smart struct nvme_fc_rport *newrec; 677e399441dSJames Smart unsigned long flags; 678e399441dSJames Smart int ret, idx; 679e399441dSJames Smart 6802b632970SJames Smart if (!nvme_fc_lport_get(lport)) { 6812b632970SJames Smart ret = -ESHUTDOWN; 6822b632970SJames Smart goto out_reghost_failed; 6832b632970SJames Smart } 6842b632970SJames Smart 6852b632970SJames Smart /* 6862b632970SJames Smart * look to see if there is already a remoteport that is waiting 6872b632970SJames Smart * for a reconnect (within dev_loss_tmo) with the same WWN's. 6882b632970SJames Smart * If so, transition to it and reconnect. 6892b632970SJames Smart */ 6902b632970SJames Smart newrec = nvme_fc_attach_to_suspended_rport(lport, pinfo); 6912b632970SJames Smart 6922b632970SJames Smart /* found an rport, but something about its state is bad */ 6932b632970SJames Smart if (IS_ERR(newrec)) { 6942b632970SJames Smart ret = PTR_ERR(newrec); 6952b632970SJames Smart goto out_lport_put; 6962b632970SJames Smart 6972b632970SJames Smart /* found existing rport, which was resumed */ 6982b632970SJames Smart } else if (newrec) { 6992b632970SJames Smart nvme_fc_lport_put(lport); 7002b632970SJames Smart __nvme_fc_set_dev_loss_tmo(newrec, pinfo); 7012b632970SJames Smart nvme_fc_signal_discovery_scan(lport, newrec); 7022b632970SJames Smart *portptr = &newrec->remoteport; 7032b632970SJames Smart return 0; 7042b632970SJames Smart } 7052b632970SJames Smart 7062b632970SJames Smart /* nothing found - allocate a new remoteport struct */ 7072b632970SJames Smart 708e399441dSJames Smart newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), 709e399441dSJames Smart GFP_KERNEL); 710e399441dSJames Smart if (!newrec) { 711e399441dSJames Smart ret = -ENOMEM; 7122b632970SJames Smart goto out_lport_put; 713e399441dSJames Smart } 714e399441dSJames Smart 715e399441dSJames Smart idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); 716e399441dSJames Smart if (idx < 0) { 717e399441dSJames Smart ret = -ENOSPC; 7182b632970SJames Smart goto out_kfree_rport; 719e399441dSJames Smart } 720e399441dSJames Smart 721e399441dSJames Smart INIT_LIST_HEAD(&newrec->endp_list); 722e399441dSJames Smart INIT_LIST_HEAD(&newrec->ctrl_list); 723c913a8b0SJames Smart INIT_LIST_HEAD(&newrec->ls_req_list); 72497faec53SJames Smart INIT_LIST_HEAD(&newrec->disc_list); 725e399441dSJames Smart kref_init(&newrec->ref); 726158bfb88SJames Smart atomic_set(&newrec->act_ctrl_cnt, 0); 727e399441dSJames Smart spin_lock_init(&newrec->lock); 728e399441dSJames Smart newrec->remoteport.localport = &lport->localport; 72914fd1e98SJames Smart INIT_LIST_HEAD(&newrec->ls_rcv_list); 730c913a8b0SJames Smart newrec->dev = lport->dev; 731c913a8b0SJames Smart newrec->lport = lport; 732f56bf76fSJames Smart if (lport->ops->remote_priv_sz) 733e399441dSJames Smart newrec->remoteport.private = &newrec[1]; 734f56bf76fSJames Smart else 735f56bf76fSJames Smart newrec->remoteport.private = NULL; 736e399441dSJames Smart newrec->remoteport.port_role = pinfo->port_role; 737e399441dSJames Smart newrec->remoteport.node_name = pinfo->node_name; 738e399441dSJames Smart newrec->remoteport.port_name = pinfo->port_name; 739e399441dSJames Smart newrec->remoteport.port_id = pinfo->port_id; 740e399441dSJames Smart newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; 741e399441dSJames Smart newrec->remoteport.port_num = idx; 7422b632970SJames Smart __nvme_fc_set_dev_loss_tmo(newrec, pinfo); 74314fd1e98SJames Smart INIT_WORK(&newrec->lsrcv_work, nvme_fc_handle_ls_rqst_work); 744e399441dSJames Smart 745e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 746e399441dSJames Smart list_add_tail(&newrec->endp_list, &lport->endp_list); 747e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 748e399441dSJames Smart 749eaefd5abSJames Smart nvme_fc_signal_discovery_scan(lport, newrec); 750eaefd5abSJames Smart 751e399441dSJames Smart *portptr = &newrec->remoteport; 752e399441dSJames Smart return 0; 753e399441dSJames Smart 754e399441dSJames Smart out_kfree_rport: 755e399441dSJames Smart kfree(newrec); 7562b632970SJames Smart out_lport_put: 7572b632970SJames Smart nvme_fc_lport_put(lport); 758e399441dSJames Smart out_reghost_failed: 759e399441dSJames Smart *portptr = NULL; 760e399441dSJames Smart return ret; 761e399441dSJames Smart } 762e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); 763e399441dSJames Smart 7648d64daf7SJames Smart static int 7658d64daf7SJames Smart nvme_fc_abort_lsops(struct nvme_fc_rport *rport) 7668d64daf7SJames Smart { 7678d64daf7SJames Smart struct nvmefc_ls_req_op *lsop; 7688d64daf7SJames Smart unsigned long flags; 7698d64daf7SJames Smart 7708d64daf7SJames Smart restart: 7718d64daf7SJames Smart spin_lock_irqsave(&rport->lock, flags); 7728d64daf7SJames Smart 7738d64daf7SJames Smart list_for_each_entry(lsop, &rport->ls_req_list, lsreq_list) { 7748d64daf7SJames Smart if (!(lsop->flags & FCOP_FLAGS_TERMIO)) { 7758d64daf7SJames Smart lsop->flags |= FCOP_FLAGS_TERMIO; 7768d64daf7SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 7778d64daf7SJames Smart rport->lport->ops->ls_abort(&rport->lport->localport, 7788d64daf7SJames Smart &rport->remoteport, 7798d64daf7SJames Smart &lsop->ls_req); 7808d64daf7SJames Smart goto restart; 7818d64daf7SJames Smart } 7828d64daf7SJames Smart } 7838d64daf7SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 7848d64daf7SJames Smart 7858d64daf7SJames Smart return 0; 7868d64daf7SJames Smart } 7878d64daf7SJames Smart 7882b632970SJames Smart static void 7892b632970SJames Smart nvme_fc_ctrl_connectivity_loss(struct nvme_fc_ctrl *ctrl) 7902b632970SJames Smart { 7912b632970SJames Smart dev_info(ctrl->ctrl.device, 7922b632970SJames Smart "NVME-FC{%d}: controller connectivity lost. Awaiting " 7932b632970SJames Smart "Reconnect", ctrl->cnum); 7942b632970SJames Smart 7952b632970SJames Smart switch (ctrl->ctrl.state) { 7962b632970SJames Smart case NVME_CTRL_NEW: 7972b632970SJames Smart case NVME_CTRL_LIVE: 7982b632970SJames Smart /* 7992b632970SJames Smart * Schedule a controller reset. The reset will terminate the 8002b632970SJames Smart * association and schedule the reconnect timer. Reconnects 8012b632970SJames Smart * will be attempted until either the ctlr_loss_tmo 8022b632970SJames Smart * (max_retries * connect_delay) expires or the remoteport's 8032b632970SJames Smart * dev_loss_tmo expires. 8042b632970SJames Smart */ 8052b632970SJames Smart if (nvme_reset_ctrl(&ctrl->ctrl)) { 8062b632970SJames Smart dev_warn(ctrl->ctrl.device, 80777d0612dSMax Gurtovoy "NVME-FC{%d}: Couldn't schedule reset.\n", 8082b632970SJames Smart ctrl->cnum); 8092b632970SJames Smart nvme_delete_ctrl(&ctrl->ctrl); 8102b632970SJames Smart } 8112b632970SJames Smart break; 8122b632970SJames Smart 813ad6a0a52SMax Gurtovoy case NVME_CTRL_CONNECTING: 8142b632970SJames Smart /* 8152b632970SJames Smart * The association has already been terminated and the 8162b632970SJames Smart * controller is attempting reconnects. No need to do anything 8172b632970SJames Smart * futher. Reconnects will be attempted until either the 8182b632970SJames Smart * ctlr_loss_tmo (max_retries * connect_delay) expires or the 8192b632970SJames Smart * remoteport's dev_loss_tmo expires. 8202b632970SJames Smart */ 8212b632970SJames Smart break; 8222b632970SJames Smart 8232b632970SJames Smart case NVME_CTRL_RESETTING: 8242b632970SJames Smart /* 8252b632970SJames Smart * Controller is already in the process of terminating the 8262b632970SJames Smart * association. No need to do anything further. The reconnect 8272b632970SJames Smart * step will kick in naturally after the association is 8282b632970SJames Smart * terminated. 8292b632970SJames Smart */ 8302b632970SJames Smart break; 8312b632970SJames Smart 8322b632970SJames Smart case NVME_CTRL_DELETING: 833ecca390eSSagi Grimberg case NVME_CTRL_DELETING_NOIO: 8342b632970SJames Smart default: 8352b632970SJames Smart /* no action to take - let it delete */ 8362b632970SJames Smart break; 8372b632970SJames Smart } 8382b632970SJames Smart } 8392b632970SJames Smart 840e399441dSJames Smart /** 841e399441dSJames Smart * nvme_fc_unregister_remoteport - transport entry point called by an 842e399441dSJames Smart * LLDD to deregister/remove a previously 843e399441dSJames Smart * registered a NVME subsystem FC port. 84476c910c7SBart Van Assche * @portptr: pointer to the (registered) remote port that is to be 845e399441dSJames Smart * deregistered. 846e399441dSJames Smart * 847e399441dSJames Smart * Returns: 848e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 849e399441dSJames Smart * (ex: -ENXIO) upon failure. 850e399441dSJames Smart */ 851e399441dSJames Smart int 852e399441dSJames Smart nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) 853e399441dSJames Smart { 854e399441dSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(portptr); 855e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 856e399441dSJames Smart unsigned long flags; 857e399441dSJames Smart 858e399441dSJames Smart if (!portptr) 859e399441dSJames Smart return -EINVAL; 860e399441dSJames Smart 861e399441dSJames Smart spin_lock_irqsave(&rport->lock, flags); 862e399441dSJames Smart 863e399441dSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 864e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 865e399441dSJames Smart return -EINVAL; 866e399441dSJames Smart } 867e399441dSJames Smart portptr->port_state = FC_OBJSTATE_DELETED; 868e399441dSJames Smart 8692b632970SJames Smart rport->dev_loss_end = jiffies + (portptr->dev_loss_tmo * HZ); 8702b632970SJames Smart 8712b632970SJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { 8722b632970SJames Smart /* if dev_loss_tmo==0, dev loss is immediate */ 8732b632970SJames Smart if (!portptr->dev_loss_tmo) { 8742b632970SJames Smart dev_warn(ctrl->ctrl.device, 87577d0612dSMax Gurtovoy "NVME-FC{%d}: controller connectivity lost.\n", 8762b632970SJames Smart ctrl->cnum); 877c5017e85SChristoph Hellwig nvme_delete_ctrl(&ctrl->ctrl); 8782b632970SJames Smart } else 8792b632970SJames Smart nvme_fc_ctrl_connectivity_loss(ctrl); 8802b632970SJames Smart } 881e399441dSJames Smart 882e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 883e399441dSJames Smart 8848d64daf7SJames Smart nvme_fc_abort_lsops(rport); 8858d64daf7SJames Smart 886158bfb88SJames Smart if (atomic_read(&rport->act_ctrl_cnt) == 0) 887158bfb88SJames Smart rport->lport->ops->remoteport_delete(portptr); 888158bfb88SJames Smart 8892b632970SJames Smart /* 8902b632970SJames Smart * release the reference, which will allow, if all controllers 8912b632970SJames Smart * go away, which should only occur after dev_loss_tmo occurs, 8922b632970SJames Smart * for the rport to be torn down. 8932b632970SJames Smart */ 894e399441dSJames Smart nvme_fc_rport_put(rport); 8952b632970SJames Smart 896e399441dSJames Smart return 0; 897e399441dSJames Smart } 898e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); 899e399441dSJames Smart 900eaefd5abSJames Smart /** 901eaefd5abSJames Smart * nvme_fc_rescan_remoteport - transport entry point called by an 902eaefd5abSJames Smart * LLDD to request a nvme device rescan. 903eaefd5abSJames Smart * @remoteport: pointer to the (registered) remote port that is to be 904eaefd5abSJames Smart * rescanned. 905eaefd5abSJames Smart * 906eaefd5abSJames Smart * Returns: N/A 907eaefd5abSJames Smart */ 908eaefd5abSJames Smart void 909eaefd5abSJames Smart nvme_fc_rescan_remoteport(struct nvme_fc_remote_port *remoteport) 910eaefd5abSJames Smart { 911eaefd5abSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(remoteport); 912eaefd5abSJames Smart 913eaefd5abSJames Smart nvme_fc_signal_discovery_scan(rport->lport, rport); 914eaefd5abSJames Smart } 915eaefd5abSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_rescan_remoteport); 916eaefd5abSJames Smart 917ac7fe82bSJames Smart int 918ac7fe82bSJames Smart nvme_fc_set_remoteport_devloss(struct nvme_fc_remote_port *portptr, 919ac7fe82bSJames Smart u32 dev_loss_tmo) 920ac7fe82bSJames Smart { 921ac7fe82bSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(portptr); 922ac7fe82bSJames Smart unsigned long flags; 923ac7fe82bSJames Smart 924ac7fe82bSJames Smart spin_lock_irqsave(&rport->lock, flags); 925ac7fe82bSJames Smart 926ac7fe82bSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 927ac7fe82bSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 928ac7fe82bSJames Smart return -EINVAL; 929ac7fe82bSJames Smart } 930ac7fe82bSJames Smart 931ac7fe82bSJames Smart /* a dev_loss_tmo of 0 (immediate) is allowed to be set */ 932ac7fe82bSJames Smart rport->remoteport.dev_loss_tmo = dev_loss_tmo; 933ac7fe82bSJames Smart 934ac7fe82bSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 935ac7fe82bSJames Smart 936ac7fe82bSJames Smart return 0; 937ac7fe82bSJames Smart } 938ac7fe82bSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_set_remoteport_devloss); 939ac7fe82bSJames Smart 940e399441dSJames Smart 941e399441dSJames Smart /* *********************** FC-NVME DMA Handling **************************** */ 942e399441dSJames Smart 943e399441dSJames Smart /* 944e399441dSJames Smart * The fcloop device passes in a NULL device pointer. Real LLD's will 945e399441dSJames Smart * pass in a valid device pointer. If NULL is passed to the dma mapping 946e399441dSJames Smart * routines, depending on the platform, it may or may not succeed, and 947e399441dSJames Smart * may crash. 948e399441dSJames Smart * 949e399441dSJames Smart * As such: 950e399441dSJames Smart * Wrapper all the dma routines and check the dev pointer. 951e399441dSJames Smart * 952e399441dSJames Smart * If simple mappings (return just a dma address, we'll noop them, 953e399441dSJames Smart * returning a dma address of 0. 954e399441dSJames Smart * 955e399441dSJames Smart * On more complex mappings (dma_map_sg), a pseudo routine fills 956e399441dSJames Smart * in the scatter list, setting all dma addresses to 0. 957e399441dSJames Smart */ 958e399441dSJames Smart 959e399441dSJames Smart static inline dma_addr_t 960e399441dSJames Smart fc_dma_map_single(struct device *dev, void *ptr, size_t size, 961e399441dSJames Smart enum dma_data_direction dir) 962e399441dSJames Smart { 963e399441dSJames Smart return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; 964e399441dSJames Smart } 965e399441dSJames Smart 966e399441dSJames Smart static inline int 967e399441dSJames Smart fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 968e399441dSJames Smart { 969e399441dSJames Smart return dev ? dma_mapping_error(dev, dma_addr) : 0; 970e399441dSJames Smart } 971e399441dSJames Smart 972e399441dSJames Smart static inline void 973e399441dSJames Smart fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, 974e399441dSJames Smart enum dma_data_direction dir) 975e399441dSJames Smart { 976e399441dSJames Smart if (dev) 977e399441dSJames Smart dma_unmap_single(dev, addr, size, dir); 978e399441dSJames Smart } 979e399441dSJames Smart 980e399441dSJames Smart static inline void 981e399441dSJames Smart fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, 982e399441dSJames Smart enum dma_data_direction dir) 983e399441dSJames Smart { 984e399441dSJames Smart if (dev) 985e399441dSJames Smart dma_sync_single_for_cpu(dev, addr, size, dir); 986e399441dSJames Smart } 987e399441dSJames Smart 988e399441dSJames Smart static inline void 989e399441dSJames Smart fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, 990e399441dSJames Smart enum dma_data_direction dir) 991e399441dSJames Smart { 992e399441dSJames Smart if (dev) 993e399441dSJames Smart dma_sync_single_for_device(dev, addr, size, dir); 994e399441dSJames Smart } 995e399441dSJames Smart 996e399441dSJames Smart /* pseudo dma_map_sg call */ 997e399441dSJames Smart static int 998e399441dSJames Smart fc_map_sg(struct scatterlist *sg, int nents) 999e399441dSJames Smart { 1000e399441dSJames Smart struct scatterlist *s; 1001e399441dSJames Smart int i; 1002e399441dSJames Smart 1003e399441dSJames Smart WARN_ON(nents == 0 || sg[0].length == 0); 1004e399441dSJames Smart 1005e399441dSJames Smart for_each_sg(sg, s, nents, i) { 1006e399441dSJames Smart s->dma_address = 0L; 1007e399441dSJames Smart #ifdef CONFIG_NEED_SG_DMA_LENGTH 1008e399441dSJames Smart s->dma_length = s->length; 1009e399441dSJames Smart #endif 1010e399441dSJames Smart } 1011e399441dSJames Smart return nents; 1012e399441dSJames Smart } 1013e399441dSJames Smart 1014e399441dSJames Smart static inline int 1015e399441dSJames Smart fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 1016e399441dSJames Smart enum dma_data_direction dir) 1017e399441dSJames Smart { 1018e399441dSJames Smart return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); 1019e399441dSJames Smart } 1020e399441dSJames Smart 1021e399441dSJames Smart static inline void 1022e399441dSJames Smart fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, 1023e399441dSJames Smart enum dma_data_direction dir) 1024e399441dSJames Smart { 1025e399441dSJames Smart if (dev) 1026e399441dSJames Smart dma_unmap_sg(dev, sg, nents, dir); 1027e399441dSJames Smart } 1028e399441dSJames Smart 1029e399441dSJames Smart /* *********************** FC-NVME LS Handling **************************** */ 1030e399441dSJames Smart 1031e399441dSJames Smart static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); 1032e399441dSJames Smart static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); 1033e399441dSJames Smart 103414fd1e98SJames Smart static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg); 1035e399441dSJames Smart 1036e399441dSJames Smart static void 1037c913a8b0SJames Smart __nvme_fc_finish_ls_req(struct nvmefc_ls_req_op *lsop) 1038e399441dSJames Smart { 1039c913a8b0SJames Smart struct nvme_fc_rport *rport = lsop->rport; 1040e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 1041e399441dSJames Smart unsigned long flags; 1042e399441dSJames Smart 1043c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 1044e399441dSJames Smart 1045e399441dSJames Smart if (!lsop->req_queued) { 1046c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 1047e399441dSJames Smart return; 1048e399441dSJames Smart } 1049e399441dSJames Smart 1050e399441dSJames Smart list_del(&lsop->lsreq_list); 1051e399441dSJames Smart 1052e399441dSJames Smart lsop->req_queued = false; 1053e399441dSJames Smart 1054c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 1055e399441dSJames Smart 1056c913a8b0SJames Smart fc_dma_unmap_single(rport->dev, lsreq->rqstdma, 1057e399441dSJames Smart (lsreq->rqstlen + lsreq->rsplen), 1058e399441dSJames Smart DMA_BIDIRECTIONAL); 1059e399441dSJames Smart 1060c913a8b0SJames Smart nvme_fc_rport_put(rport); 1061e399441dSJames Smart } 1062e399441dSJames Smart 1063e399441dSJames Smart static int 1064c913a8b0SJames Smart __nvme_fc_send_ls_req(struct nvme_fc_rport *rport, 1065e399441dSJames Smart struct nvmefc_ls_req_op *lsop, 1066e399441dSJames Smart void (*done)(struct nvmefc_ls_req *req, int status)) 1067e399441dSJames Smart { 1068e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 1069e399441dSJames Smart unsigned long flags; 1070c913a8b0SJames Smart int ret = 0; 1071e399441dSJames Smart 1072c913a8b0SJames Smart if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 1073c913a8b0SJames Smart return -ECONNREFUSED; 1074c913a8b0SJames Smart 1075c913a8b0SJames Smart if (!nvme_fc_rport_get(rport)) 1076e399441dSJames Smart return -ESHUTDOWN; 1077e399441dSJames Smart 1078e399441dSJames Smart lsreq->done = done; 1079c913a8b0SJames Smart lsop->rport = rport; 1080e399441dSJames Smart lsop->req_queued = false; 1081e399441dSJames Smart INIT_LIST_HEAD(&lsop->lsreq_list); 1082e399441dSJames Smart init_completion(&lsop->ls_done); 1083e399441dSJames Smart 1084c913a8b0SJames Smart lsreq->rqstdma = fc_dma_map_single(rport->dev, lsreq->rqstaddr, 1085e399441dSJames Smart lsreq->rqstlen + lsreq->rsplen, 1086e399441dSJames Smart DMA_BIDIRECTIONAL); 1087c913a8b0SJames Smart if (fc_dma_mapping_error(rport->dev, lsreq->rqstdma)) { 1088c913a8b0SJames Smart ret = -EFAULT; 1089c913a8b0SJames Smart goto out_putrport; 1090e399441dSJames Smart } 1091e399441dSJames Smart lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; 1092e399441dSJames Smart 1093c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 1094e399441dSJames Smart 1095c913a8b0SJames Smart list_add_tail(&lsop->lsreq_list, &rport->ls_req_list); 1096e399441dSJames Smart 1097e399441dSJames Smart lsop->req_queued = true; 1098e399441dSJames Smart 1099c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 1100e399441dSJames Smart 1101c913a8b0SJames Smart ret = rport->lport->ops->ls_req(&rport->lport->localport, 1102c913a8b0SJames Smart &rport->remoteport, lsreq); 1103e399441dSJames Smart if (ret) 1104c913a8b0SJames Smart goto out_unlink; 1105c913a8b0SJames Smart 1106c913a8b0SJames Smart return 0; 1107c913a8b0SJames Smart 1108c913a8b0SJames Smart out_unlink: 1109e399441dSJames Smart lsop->ls_error = ret; 1110c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 1111c913a8b0SJames Smart lsop->req_queued = false; 1112c913a8b0SJames Smart list_del(&lsop->lsreq_list); 1113c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 1114c913a8b0SJames Smart fc_dma_unmap_single(rport->dev, lsreq->rqstdma, 1115c913a8b0SJames Smart (lsreq->rqstlen + lsreq->rsplen), 1116c913a8b0SJames Smart DMA_BIDIRECTIONAL); 1117c913a8b0SJames Smart out_putrport: 1118c913a8b0SJames Smart nvme_fc_rport_put(rport); 1119e399441dSJames Smart 1120e399441dSJames Smart return ret; 1121e399441dSJames Smart } 1122e399441dSJames Smart 1123e399441dSJames Smart static void 1124e399441dSJames Smart nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) 1125e399441dSJames Smart { 1126e399441dSJames Smart struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); 1127e399441dSJames Smart 1128e399441dSJames Smart lsop->ls_error = status; 1129e399441dSJames Smart complete(&lsop->ls_done); 1130e399441dSJames Smart } 1131e399441dSJames Smart 1132e399441dSJames Smart static int 1133c913a8b0SJames Smart nvme_fc_send_ls_req(struct nvme_fc_rport *rport, struct nvmefc_ls_req_op *lsop) 1134e399441dSJames Smart { 1135e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 1136e399441dSJames Smart struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; 1137e399441dSJames Smart int ret; 1138e399441dSJames Smart 1139c913a8b0SJames Smart ret = __nvme_fc_send_ls_req(rport, lsop, nvme_fc_send_ls_req_done); 1140e399441dSJames Smart 1141c913a8b0SJames Smart if (!ret) { 1142e399441dSJames Smart /* 1143e399441dSJames Smart * No timeout/not interruptible as we need the struct 1144e399441dSJames Smart * to exist until the lldd calls us back. Thus mandate 1145e399441dSJames Smart * wait until driver calls back. lldd responsible for 1146e399441dSJames Smart * the timeout action 1147e399441dSJames Smart */ 1148e399441dSJames Smart wait_for_completion(&lsop->ls_done); 1149e399441dSJames Smart 1150c913a8b0SJames Smart __nvme_fc_finish_ls_req(lsop); 1151e399441dSJames Smart 1152c913a8b0SJames Smart ret = lsop->ls_error; 1153e399441dSJames Smart } 1154e399441dSJames Smart 1155c913a8b0SJames Smart if (ret) 1156c913a8b0SJames Smart return ret; 1157c913a8b0SJames Smart 1158e399441dSJames Smart /* ACC or RJT payload ? */ 1159e399441dSJames Smart if (rjt->w0.ls_cmd == FCNVME_LS_RJT) 1160e399441dSJames Smart return -ENXIO; 1161e399441dSJames Smart 1162e399441dSJames Smart return 0; 1163e399441dSJames Smart } 1164e399441dSJames Smart 1165c913a8b0SJames Smart static int 1166c913a8b0SJames Smart nvme_fc_send_ls_req_async(struct nvme_fc_rport *rport, 1167e399441dSJames Smart struct nvmefc_ls_req_op *lsop, 1168e399441dSJames Smart void (*done)(struct nvmefc_ls_req *req, int status)) 1169e399441dSJames Smart { 1170e399441dSJames Smart /* don't wait for completion */ 1171e399441dSJames Smart 1172c913a8b0SJames Smart return __nvme_fc_send_ls_req(rport, lsop, done); 1173e399441dSJames Smart } 1174e399441dSJames Smart 1175e399441dSJames Smart static int 1176e399441dSJames Smart nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, 1177e399441dSJames Smart struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) 1178e399441dSJames Smart { 1179e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1180e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1181e399441dSJames Smart struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; 1182e399441dSJames Smart struct fcnvme_ls_cr_assoc_acc *assoc_acc; 118314fd1e98SJames Smart unsigned long flags; 1184e399441dSJames Smart int ret, fcret = 0; 1185e399441dSJames Smart 1186e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1187f56bf76fSJames Smart sizeof(*assoc_rqst) + sizeof(*assoc_acc) + 1188f56bf76fSJames Smart ctrl->lport->ops->lsrqst_priv_sz), GFP_KERNEL); 1189e399441dSJames Smart if (!lsop) { 1190f56bf76fSJames Smart dev_info(ctrl->ctrl.device, 1191f56bf76fSJames Smart "NVME-FC{%d}: send Create Association failed: ENOMEM\n", 1192f56bf76fSJames Smart ctrl->cnum); 1193e399441dSJames Smart ret = -ENOMEM; 1194e399441dSJames Smart goto out_no_memory; 1195e399441dSJames Smart } 1196e399441dSJames Smart 1197f56bf76fSJames Smart assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *)&lsop[1]; 1198e399441dSJames Smart assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; 1199f56bf76fSJames Smart lsreq = &lsop->ls_req; 1200f56bf76fSJames Smart if (ctrl->lport->ops->lsrqst_priv_sz) 1201f56bf76fSJames Smart lsreq->private = &assoc_acc[1]; 1202f56bf76fSJames Smart else 1203f56bf76fSJames Smart lsreq->private = NULL; 1204e399441dSJames Smart 1205e399441dSJames Smart assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; 1206e399441dSJames Smart assoc_rqst->desc_list_len = 1207e399441dSJames Smart cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); 1208e399441dSJames Smart 1209e399441dSJames Smart assoc_rqst->assoc_cmd.desc_tag = 1210e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); 1211e399441dSJames Smart assoc_rqst->assoc_cmd.desc_len = 1212e399441dSJames Smart fcnvme_lsdesc_len( 1213e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); 1214e399441dSJames Smart 1215e399441dSJames Smart assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); 1216d157e534SJames Smart assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize - 1); 1217e399441dSJames Smart /* Linux supports only Dynamic controllers */ 1218e399441dSJames Smart assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); 12198e412263SChristoph Hellwig uuid_copy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id); 1220e399441dSJames Smart strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, 1221e399441dSJames Smart min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); 1222e399441dSJames Smart strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, 1223e399441dSJames Smart min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); 1224e399441dSJames Smart 1225e399441dSJames Smart lsop->queue = queue; 1226e399441dSJames Smart lsreq->rqstaddr = assoc_rqst; 1227e399441dSJames Smart lsreq->rqstlen = sizeof(*assoc_rqst); 1228e399441dSJames Smart lsreq->rspaddr = assoc_acc; 1229e399441dSJames Smart lsreq->rsplen = sizeof(*assoc_acc); 123053b2b2f5SJames Smart lsreq->timeout = NVME_FC_LS_TIMEOUT_SEC; 1231e399441dSJames Smart 1232c913a8b0SJames Smart ret = nvme_fc_send_ls_req(ctrl->rport, lsop); 1233e399441dSJames Smart if (ret) 1234e399441dSJames Smart goto out_free_buffer; 1235e399441dSJames Smart 1236e399441dSJames Smart /* process connect LS completion */ 1237e399441dSJames Smart 1238e399441dSJames Smart /* validate the ACC response */ 1239e399441dSJames Smart if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) 1240e399441dSJames Smart fcret = VERR_LSACC; 1241f77fc87cSJames Smart else if (assoc_acc->hdr.desc_list_len != 1242e399441dSJames Smart fcnvme_lsdesc_len( 1243e399441dSJames Smart sizeof(struct fcnvme_ls_cr_assoc_acc))) 1244e399441dSJames Smart fcret = VERR_CR_ASSOC_ACC_LEN; 1245f77fc87cSJames Smart else if (assoc_acc->hdr.rqst.desc_tag != 1246f77fc87cSJames Smart cpu_to_be32(FCNVME_LSDESC_RQST)) 1247e399441dSJames Smart fcret = VERR_LSDESC_RQST; 1248e399441dSJames Smart else if (assoc_acc->hdr.rqst.desc_len != 1249e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) 1250e399441dSJames Smart fcret = VERR_LSDESC_RQST_LEN; 1251e399441dSJames Smart else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) 1252e399441dSJames Smart fcret = VERR_CR_ASSOC; 1253e399441dSJames Smart else if (assoc_acc->associd.desc_tag != 1254e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) 1255e399441dSJames Smart fcret = VERR_ASSOC_ID; 1256e399441dSJames Smart else if (assoc_acc->associd.desc_len != 1257e399441dSJames Smart fcnvme_lsdesc_len( 1258e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id))) 1259e399441dSJames Smart fcret = VERR_ASSOC_ID_LEN; 1260e399441dSJames Smart else if (assoc_acc->connectid.desc_tag != 1261e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CONN_ID)) 1262e399441dSJames Smart fcret = VERR_CONN_ID; 1263e399441dSJames Smart else if (assoc_acc->connectid.desc_len != 1264e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) 1265e399441dSJames Smart fcret = VERR_CONN_ID_LEN; 1266e399441dSJames Smart 1267e399441dSJames Smart if (fcret) { 1268e399441dSJames Smart ret = -EBADF; 1269e399441dSJames Smart dev_err(ctrl->dev, 12707db39484SJames Smart "q %d Create Association LS failed: %s\n", 1271e399441dSJames Smart queue->qnum, validation_errors[fcret]); 1272e399441dSJames Smart } else { 127314fd1e98SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 1274e399441dSJames Smart ctrl->association_id = 1275e399441dSJames Smart be64_to_cpu(assoc_acc->associd.association_id); 1276e399441dSJames Smart queue->connection_id = 1277e399441dSJames Smart be64_to_cpu(assoc_acc->connectid.connection_id); 1278e399441dSJames Smart set_bit(NVME_FC_Q_CONNECTED, &queue->flags); 127914fd1e98SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 1280e399441dSJames Smart } 1281e399441dSJames Smart 1282e399441dSJames Smart out_free_buffer: 1283e399441dSJames Smart kfree(lsop); 1284e399441dSJames Smart out_no_memory: 1285e399441dSJames Smart if (ret) 1286e399441dSJames Smart dev_err(ctrl->dev, 1287e399441dSJames Smart "queue %d connect admin queue failed (%d).\n", 1288e399441dSJames Smart queue->qnum, ret); 1289e399441dSJames Smart return ret; 1290e399441dSJames Smart } 1291e399441dSJames Smart 1292e399441dSJames Smart static int 1293e399441dSJames Smart nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, 1294e399441dSJames Smart u16 qsize, u16 ersp_ratio) 1295e399441dSJames Smart { 1296e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1297e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1298e399441dSJames Smart struct fcnvme_ls_cr_conn_rqst *conn_rqst; 1299e399441dSJames Smart struct fcnvme_ls_cr_conn_acc *conn_acc; 1300e399441dSJames Smart int ret, fcret = 0; 1301e399441dSJames Smart 1302e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1303f56bf76fSJames Smart sizeof(*conn_rqst) + sizeof(*conn_acc) + 1304f56bf76fSJames Smart ctrl->lport->ops->lsrqst_priv_sz), GFP_KERNEL); 1305e399441dSJames Smart if (!lsop) { 1306f56bf76fSJames Smart dev_info(ctrl->ctrl.device, 1307f56bf76fSJames Smart "NVME-FC{%d}: send Create Connection failed: ENOMEM\n", 1308f56bf76fSJames Smart ctrl->cnum); 1309e399441dSJames Smart ret = -ENOMEM; 1310e399441dSJames Smart goto out_no_memory; 1311e399441dSJames Smart } 1312e399441dSJames Smart 1313f56bf76fSJames Smart conn_rqst = (struct fcnvme_ls_cr_conn_rqst *)&lsop[1]; 1314e399441dSJames Smart conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; 1315f56bf76fSJames Smart lsreq = &lsop->ls_req; 1316f56bf76fSJames Smart if (ctrl->lport->ops->lsrqst_priv_sz) 1317f56bf76fSJames Smart lsreq->private = (void *)&conn_acc[1]; 1318f56bf76fSJames Smart else 1319f56bf76fSJames Smart lsreq->private = NULL; 1320e399441dSJames Smart 1321e399441dSJames Smart conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; 1322e399441dSJames Smart conn_rqst->desc_list_len = cpu_to_be32( 1323e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id) + 1324e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); 1325e399441dSJames Smart 1326e399441dSJames Smart conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); 1327e399441dSJames Smart conn_rqst->associd.desc_len = 1328e399441dSJames Smart fcnvme_lsdesc_len( 1329e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id)); 1330e399441dSJames Smart conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); 1331e399441dSJames Smart conn_rqst->connect_cmd.desc_tag = 1332e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); 1333e399441dSJames Smart conn_rqst->connect_cmd.desc_len = 1334e399441dSJames Smart fcnvme_lsdesc_len( 1335e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); 1336e399441dSJames Smart conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); 1337e399441dSJames Smart conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); 1338d157e534SJames Smart conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize - 1); 1339e399441dSJames Smart 1340e399441dSJames Smart lsop->queue = queue; 1341e399441dSJames Smart lsreq->rqstaddr = conn_rqst; 1342e399441dSJames Smart lsreq->rqstlen = sizeof(*conn_rqst); 1343e399441dSJames Smart lsreq->rspaddr = conn_acc; 1344e399441dSJames Smart lsreq->rsplen = sizeof(*conn_acc); 134553b2b2f5SJames Smart lsreq->timeout = NVME_FC_LS_TIMEOUT_SEC; 1346e399441dSJames Smart 1347c913a8b0SJames Smart ret = nvme_fc_send_ls_req(ctrl->rport, lsop); 1348e399441dSJames Smart if (ret) 1349e399441dSJames Smart goto out_free_buffer; 1350e399441dSJames Smart 1351e399441dSJames Smart /* process connect LS completion */ 1352e399441dSJames Smart 1353e399441dSJames Smart /* validate the ACC response */ 1354e399441dSJames Smart if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) 1355e399441dSJames Smart fcret = VERR_LSACC; 1356f77fc87cSJames Smart else if (conn_acc->hdr.desc_list_len != 1357e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) 1358e399441dSJames Smart fcret = VERR_CR_CONN_ACC_LEN; 1359f77fc87cSJames Smart else if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) 1360e399441dSJames Smart fcret = VERR_LSDESC_RQST; 1361e399441dSJames Smart else if (conn_acc->hdr.rqst.desc_len != 1362e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) 1363e399441dSJames Smart fcret = VERR_LSDESC_RQST_LEN; 1364e399441dSJames Smart else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) 1365e399441dSJames Smart fcret = VERR_CR_CONN; 1366e399441dSJames Smart else if (conn_acc->connectid.desc_tag != 1367e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CONN_ID)) 1368e399441dSJames Smart fcret = VERR_CONN_ID; 1369e399441dSJames Smart else if (conn_acc->connectid.desc_len != 1370e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) 1371e399441dSJames Smart fcret = VERR_CONN_ID_LEN; 1372e399441dSJames Smart 1373e399441dSJames Smart if (fcret) { 1374e399441dSJames Smart ret = -EBADF; 1375e399441dSJames Smart dev_err(ctrl->dev, 13767db39484SJames Smart "q %d Create I/O Connection LS failed: %s\n", 1377e399441dSJames Smart queue->qnum, validation_errors[fcret]); 1378e399441dSJames Smart } else { 1379e399441dSJames Smart queue->connection_id = 1380e399441dSJames Smart be64_to_cpu(conn_acc->connectid.connection_id); 1381e399441dSJames Smart set_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1382e399441dSJames Smart } 1383e399441dSJames Smart 1384e399441dSJames Smart out_free_buffer: 1385e399441dSJames Smart kfree(lsop); 1386e399441dSJames Smart out_no_memory: 1387e399441dSJames Smart if (ret) 1388e399441dSJames Smart dev_err(ctrl->dev, 13897db39484SJames Smart "queue %d connect I/O queue failed (%d).\n", 1390e399441dSJames Smart queue->qnum, ret); 1391e399441dSJames Smart return ret; 1392e399441dSJames Smart } 1393e399441dSJames Smart 1394e399441dSJames Smart static void 1395e399441dSJames Smart nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) 1396e399441dSJames Smart { 1397e399441dSJames Smart struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); 1398e399441dSJames Smart 1399c913a8b0SJames Smart __nvme_fc_finish_ls_req(lsop); 1400e399441dSJames Smart 1401d4e4230cSMilan P. Gandhi /* fc-nvme initiator doesn't care about success or failure of cmd */ 1402e399441dSJames Smart 1403e399441dSJames Smart kfree(lsop); 1404e399441dSJames Smart } 1405e399441dSJames Smart 1406e399441dSJames Smart /* 1407e399441dSJames Smart * This routine sends a FC-NVME LS to disconnect (aka terminate) 1408e399441dSJames Smart * the FC-NVME Association. Terminating the association also 1409e399441dSJames Smart * terminates the FC-NVME connections (per queue, both admin and io 1410e399441dSJames Smart * queues) that are part of the association. E.g. things are torn 1411e399441dSJames Smart * down, and the related FC-NVME Association ID and Connection IDs 1412e399441dSJames Smart * become invalid. 1413e399441dSJames Smart * 1414e399441dSJames Smart * The behavior of the fc-nvme initiator is such that it's 1415e399441dSJames Smart * understanding of the association and connections will implicitly 1416e399441dSJames Smart * be torn down. The action is implicit as it may be due to a loss of 1417e399441dSJames Smart * connectivity with the fc-nvme target, so you may never get a 1418e399441dSJames Smart * response even if you tried. As such, the action of this routine 1419e399441dSJames Smart * is to asynchronously send the LS, ignore any results of the LS, and 1420e399441dSJames Smart * continue on with terminating the association. If the fc-nvme target 1421e399441dSJames Smart * is present and receives the LS, it too can tear down. 1422e399441dSJames Smart */ 1423e399441dSJames Smart static void 1424e399441dSJames Smart nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) 1425e399441dSJames Smart { 142653b2b2f5SJames Smart struct fcnvme_ls_disconnect_assoc_rqst *discon_rqst; 142753b2b2f5SJames Smart struct fcnvme_ls_disconnect_assoc_acc *discon_acc; 1428e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1429e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1430c913a8b0SJames Smart int ret; 1431e399441dSJames Smart 1432e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1433f56bf76fSJames Smart sizeof(*discon_rqst) + sizeof(*discon_acc) + 1434f56bf76fSJames Smart ctrl->lport->ops->lsrqst_priv_sz), GFP_KERNEL); 1435f56bf76fSJames Smart if (!lsop) { 1436f56bf76fSJames Smart dev_info(ctrl->ctrl.device, 1437f56bf76fSJames Smart "NVME-FC{%d}: send Disconnect Association " 1438f56bf76fSJames Smart "failed: ENOMEM\n", 1439f56bf76fSJames Smart ctrl->cnum); 1440e399441dSJames Smart return; 1441f56bf76fSJames Smart } 1442e399441dSJames Smart 1443f56bf76fSJames Smart discon_rqst = (struct fcnvme_ls_disconnect_assoc_rqst *)&lsop[1]; 144453b2b2f5SJames Smart discon_acc = (struct fcnvme_ls_disconnect_assoc_acc *)&discon_rqst[1]; 1445f56bf76fSJames Smart lsreq = &lsop->ls_req; 1446f56bf76fSJames Smart if (ctrl->lport->ops->lsrqst_priv_sz) 1447f56bf76fSJames Smart lsreq->private = (void *)&discon_acc[1]; 1448f56bf76fSJames Smart else 1449f56bf76fSJames Smart lsreq->private = NULL; 1450e399441dSJames Smart 1451fd5a5f22SJames Smart nvmefc_fmt_lsreq_discon_assoc(lsreq, discon_rqst, discon_acc, 1452fd5a5f22SJames Smart ctrl->association_id); 1453e399441dSJames Smart 1454c913a8b0SJames Smart ret = nvme_fc_send_ls_req_async(ctrl->rport, lsop, 1455c913a8b0SJames Smart nvme_fc_disconnect_assoc_done); 1456c913a8b0SJames Smart if (ret) 1457c913a8b0SJames Smart kfree(lsop); 1458e399441dSJames Smart } 1459e399441dSJames Smart 146014fd1e98SJames Smart static void 146114fd1e98SJames Smart nvme_fc_xmt_ls_rsp_done(struct nvmefc_ls_rsp *lsrsp) 146214fd1e98SJames Smart { 146314fd1e98SJames Smart struct nvmefc_ls_rcv_op *lsop = lsrsp->nvme_fc_private; 146414fd1e98SJames Smart struct nvme_fc_rport *rport = lsop->rport; 146514fd1e98SJames Smart struct nvme_fc_lport *lport = rport->lport; 146614fd1e98SJames Smart unsigned long flags; 146714fd1e98SJames Smart 146814fd1e98SJames Smart spin_lock_irqsave(&rport->lock, flags); 146914fd1e98SJames Smart list_del(&lsop->lsrcv_list); 147014fd1e98SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 147114fd1e98SJames Smart 147214fd1e98SJames Smart fc_dma_sync_single_for_cpu(lport->dev, lsop->rspdma, 147314fd1e98SJames Smart sizeof(*lsop->rspbuf), DMA_TO_DEVICE); 147414fd1e98SJames Smart fc_dma_unmap_single(lport->dev, lsop->rspdma, 147514fd1e98SJames Smart sizeof(*lsop->rspbuf), DMA_TO_DEVICE); 147614fd1e98SJames Smart 147714fd1e98SJames Smart kfree(lsop); 147814fd1e98SJames Smart 147914fd1e98SJames Smart nvme_fc_rport_put(rport); 148014fd1e98SJames Smart } 148114fd1e98SJames Smart 148214fd1e98SJames Smart static void 148314fd1e98SJames Smart nvme_fc_xmt_ls_rsp(struct nvmefc_ls_rcv_op *lsop) 148414fd1e98SJames Smart { 148514fd1e98SJames Smart struct nvme_fc_rport *rport = lsop->rport; 148614fd1e98SJames Smart struct nvme_fc_lport *lport = rport->lport; 148714fd1e98SJames Smart struct fcnvme_ls_rqst_w0 *w0 = &lsop->rqstbuf->w0; 148814fd1e98SJames Smart int ret; 148914fd1e98SJames Smart 149014fd1e98SJames Smart fc_dma_sync_single_for_device(lport->dev, lsop->rspdma, 149114fd1e98SJames Smart sizeof(*lsop->rspbuf), DMA_TO_DEVICE); 149214fd1e98SJames Smart 149314fd1e98SJames Smart ret = lport->ops->xmt_ls_rsp(&lport->localport, &rport->remoteport, 149414fd1e98SJames Smart lsop->lsrsp); 149514fd1e98SJames Smart if (ret) { 149614fd1e98SJames Smart dev_warn(lport->dev, 149714fd1e98SJames Smart "LLDD rejected LS RSP xmt: LS %d status %d\n", 149814fd1e98SJames Smart w0->ls_cmd, ret); 149914fd1e98SJames Smart nvme_fc_xmt_ls_rsp_done(lsop->lsrsp); 150014fd1e98SJames Smart return; 150114fd1e98SJames Smart } 150214fd1e98SJames Smart } 150314fd1e98SJames Smart 150414fd1e98SJames Smart static struct nvme_fc_ctrl * 150514fd1e98SJames Smart nvme_fc_match_disconn_ls(struct nvme_fc_rport *rport, 150614fd1e98SJames Smart struct nvmefc_ls_rcv_op *lsop) 150714fd1e98SJames Smart { 150814fd1e98SJames Smart struct fcnvme_ls_disconnect_assoc_rqst *rqst = 150914fd1e98SJames Smart &lsop->rqstbuf->rq_dis_assoc; 151014fd1e98SJames Smart struct nvme_fc_ctrl *ctrl, *ret = NULL; 151114fd1e98SJames Smart struct nvmefc_ls_rcv_op *oldls = NULL; 151214fd1e98SJames Smart u64 association_id = be64_to_cpu(rqst->associd.association_id); 151314fd1e98SJames Smart unsigned long flags; 151414fd1e98SJames Smart 151514fd1e98SJames Smart spin_lock_irqsave(&rport->lock, flags); 151614fd1e98SJames Smart 151714fd1e98SJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { 151814fd1e98SJames Smart if (!nvme_fc_ctrl_get(ctrl)) 151914fd1e98SJames Smart continue; 152014fd1e98SJames Smart spin_lock(&ctrl->lock); 152114fd1e98SJames Smart if (association_id == ctrl->association_id) { 152214fd1e98SJames Smart oldls = ctrl->rcv_disconn; 152314fd1e98SJames Smart ctrl->rcv_disconn = lsop; 152414fd1e98SJames Smart ret = ctrl; 152514fd1e98SJames Smart } 152614fd1e98SJames Smart spin_unlock(&ctrl->lock); 152714fd1e98SJames Smart if (ret) 152814fd1e98SJames Smart /* leave the ctrl get reference */ 152914fd1e98SJames Smart break; 153014fd1e98SJames Smart nvme_fc_ctrl_put(ctrl); 153114fd1e98SJames Smart } 153214fd1e98SJames Smart 153314fd1e98SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 153414fd1e98SJames Smart 153514fd1e98SJames Smart /* transmit a response for anything that was pending */ 153614fd1e98SJames Smart if (oldls) { 153714fd1e98SJames Smart dev_info(rport->lport->dev, 153814fd1e98SJames Smart "NVME-FC{%d}: Multiple Disconnect Association " 153914fd1e98SJames Smart "LS's received\n", ctrl->cnum); 154014fd1e98SJames Smart /* overwrite good response with bogus failure */ 154114fd1e98SJames Smart oldls->lsrsp->rsplen = nvme_fc_format_rjt(oldls->rspbuf, 154214fd1e98SJames Smart sizeof(*oldls->rspbuf), 154314fd1e98SJames Smart rqst->w0.ls_cmd, 154414fd1e98SJames Smart FCNVME_RJT_RC_UNAB, 154514fd1e98SJames Smart FCNVME_RJT_EXP_NONE, 0); 154614fd1e98SJames Smart nvme_fc_xmt_ls_rsp(oldls); 154714fd1e98SJames Smart } 154814fd1e98SJames Smart 154914fd1e98SJames Smart return ret; 155014fd1e98SJames Smart } 155114fd1e98SJames Smart 155214fd1e98SJames Smart /* 155314fd1e98SJames Smart * returns true to mean LS handled and ls_rsp can be sent 155414fd1e98SJames Smart * returns false to defer ls_rsp xmt (will be done as part of 155514fd1e98SJames Smart * association termination) 155614fd1e98SJames Smart */ 155714fd1e98SJames Smart static bool 155814fd1e98SJames Smart nvme_fc_ls_disconnect_assoc(struct nvmefc_ls_rcv_op *lsop) 155914fd1e98SJames Smart { 156014fd1e98SJames Smart struct nvme_fc_rport *rport = lsop->rport; 156114fd1e98SJames Smart struct fcnvme_ls_disconnect_assoc_rqst *rqst = 156214fd1e98SJames Smart &lsop->rqstbuf->rq_dis_assoc; 156314fd1e98SJames Smart struct fcnvme_ls_disconnect_assoc_acc *acc = 156414fd1e98SJames Smart &lsop->rspbuf->rsp_dis_assoc; 156514fd1e98SJames Smart struct nvme_fc_ctrl *ctrl = NULL; 156614fd1e98SJames Smart int ret = 0; 156714fd1e98SJames Smart 156814fd1e98SJames Smart memset(acc, 0, sizeof(*acc)); 156914fd1e98SJames Smart 157014fd1e98SJames Smart ret = nvmefc_vldt_lsreq_discon_assoc(lsop->rqstdatalen, rqst); 157114fd1e98SJames Smart if (!ret) { 157214fd1e98SJames Smart /* match an active association */ 157314fd1e98SJames Smart ctrl = nvme_fc_match_disconn_ls(rport, lsop); 157414fd1e98SJames Smart if (!ctrl) 157514fd1e98SJames Smart ret = VERR_NO_ASSOC; 157614fd1e98SJames Smart } 157714fd1e98SJames Smart 157814fd1e98SJames Smart if (ret) { 157914fd1e98SJames Smart dev_info(rport->lport->dev, 158014fd1e98SJames Smart "Disconnect LS failed: %s\n", 158114fd1e98SJames Smart validation_errors[ret]); 158214fd1e98SJames Smart lsop->lsrsp->rsplen = nvme_fc_format_rjt(acc, 158314fd1e98SJames Smart sizeof(*acc), rqst->w0.ls_cmd, 158414fd1e98SJames Smart (ret == VERR_NO_ASSOC) ? 158514fd1e98SJames Smart FCNVME_RJT_RC_INV_ASSOC : 158614fd1e98SJames Smart FCNVME_RJT_RC_LOGIC, 158714fd1e98SJames Smart FCNVME_RJT_EXP_NONE, 0); 158814fd1e98SJames Smart return true; 158914fd1e98SJames Smart } 159014fd1e98SJames Smart 159114fd1e98SJames Smart /* format an ACCept response */ 159214fd1e98SJames Smart 159314fd1e98SJames Smart lsop->lsrsp->rsplen = sizeof(*acc); 159414fd1e98SJames Smart 159514fd1e98SJames Smart nvme_fc_format_rsp_hdr(acc, FCNVME_LS_ACC, 159614fd1e98SJames Smart fcnvme_lsdesc_len( 159714fd1e98SJames Smart sizeof(struct fcnvme_ls_disconnect_assoc_acc)), 159814fd1e98SJames Smart FCNVME_LS_DISCONNECT_ASSOC); 159914fd1e98SJames Smart 160014fd1e98SJames Smart /* 160114fd1e98SJames Smart * the transmit of the response will occur after the exchanges 160214fd1e98SJames Smart * for the association have been ABTS'd by 160314fd1e98SJames Smart * nvme_fc_delete_association(). 160414fd1e98SJames Smart */ 160514fd1e98SJames Smart 160614fd1e98SJames Smart /* fail the association */ 160714fd1e98SJames Smart nvme_fc_error_recovery(ctrl, "Disconnect Association LS received"); 160814fd1e98SJames Smart 160914fd1e98SJames Smart /* release the reference taken by nvme_fc_match_disconn_ls() */ 161014fd1e98SJames Smart nvme_fc_ctrl_put(ctrl); 161114fd1e98SJames Smart 161214fd1e98SJames Smart return false; 161314fd1e98SJames Smart } 161414fd1e98SJames Smart 161514fd1e98SJames Smart /* 161614fd1e98SJames Smart * Actual Processing routine for received FC-NVME LS Requests from the LLD 161714fd1e98SJames Smart * returns true if a response should be sent afterward, false if rsp will 161814fd1e98SJames Smart * be sent asynchronously. 161914fd1e98SJames Smart */ 162014fd1e98SJames Smart static bool 162114fd1e98SJames Smart nvme_fc_handle_ls_rqst(struct nvmefc_ls_rcv_op *lsop) 162214fd1e98SJames Smart { 162314fd1e98SJames Smart struct fcnvme_ls_rqst_w0 *w0 = &lsop->rqstbuf->w0; 162414fd1e98SJames Smart bool ret = true; 162514fd1e98SJames Smart 162614fd1e98SJames Smart lsop->lsrsp->nvme_fc_private = lsop; 162714fd1e98SJames Smart lsop->lsrsp->rspbuf = lsop->rspbuf; 162814fd1e98SJames Smart lsop->lsrsp->rspdma = lsop->rspdma; 162914fd1e98SJames Smart lsop->lsrsp->done = nvme_fc_xmt_ls_rsp_done; 163014fd1e98SJames Smart /* Be preventative. handlers will later set to valid length */ 163114fd1e98SJames Smart lsop->lsrsp->rsplen = 0; 163214fd1e98SJames Smart 163314fd1e98SJames Smart /* 163414fd1e98SJames Smart * handlers: 163514fd1e98SJames Smart * parse request input, execute the request, and format the 163614fd1e98SJames Smart * LS response 163714fd1e98SJames Smart */ 163814fd1e98SJames Smart switch (w0->ls_cmd) { 163914fd1e98SJames Smart case FCNVME_LS_DISCONNECT_ASSOC: 164014fd1e98SJames Smart ret = nvme_fc_ls_disconnect_assoc(lsop); 164114fd1e98SJames Smart break; 164214fd1e98SJames Smart case FCNVME_LS_DISCONNECT_CONN: 164314fd1e98SJames Smart lsop->lsrsp->rsplen = nvme_fc_format_rjt(lsop->rspbuf, 164414fd1e98SJames Smart sizeof(*lsop->rspbuf), w0->ls_cmd, 164514fd1e98SJames Smart FCNVME_RJT_RC_UNSUP, FCNVME_RJT_EXP_NONE, 0); 164614fd1e98SJames Smart break; 164714fd1e98SJames Smart case FCNVME_LS_CREATE_ASSOCIATION: 164814fd1e98SJames Smart case FCNVME_LS_CREATE_CONNECTION: 164914fd1e98SJames Smart lsop->lsrsp->rsplen = nvme_fc_format_rjt(lsop->rspbuf, 165014fd1e98SJames Smart sizeof(*lsop->rspbuf), w0->ls_cmd, 165114fd1e98SJames Smart FCNVME_RJT_RC_LOGIC, FCNVME_RJT_EXP_NONE, 0); 165214fd1e98SJames Smart break; 165314fd1e98SJames Smart default: 165414fd1e98SJames Smart lsop->lsrsp->rsplen = nvme_fc_format_rjt(lsop->rspbuf, 165514fd1e98SJames Smart sizeof(*lsop->rspbuf), w0->ls_cmd, 165614fd1e98SJames Smart FCNVME_RJT_RC_INVAL, FCNVME_RJT_EXP_NONE, 0); 165714fd1e98SJames Smart break; 165814fd1e98SJames Smart } 165914fd1e98SJames Smart 166014fd1e98SJames Smart return(ret); 166114fd1e98SJames Smart } 166214fd1e98SJames Smart 166314fd1e98SJames Smart static void 166414fd1e98SJames Smart nvme_fc_handle_ls_rqst_work(struct work_struct *work) 166514fd1e98SJames Smart { 166614fd1e98SJames Smart struct nvme_fc_rport *rport = 166714fd1e98SJames Smart container_of(work, struct nvme_fc_rport, lsrcv_work); 166814fd1e98SJames Smart struct fcnvme_ls_rqst_w0 *w0; 166914fd1e98SJames Smart struct nvmefc_ls_rcv_op *lsop; 167014fd1e98SJames Smart unsigned long flags; 167114fd1e98SJames Smart bool sendrsp; 167214fd1e98SJames Smart 167314fd1e98SJames Smart restart: 167414fd1e98SJames Smart sendrsp = true; 167514fd1e98SJames Smart spin_lock_irqsave(&rport->lock, flags); 167614fd1e98SJames Smart list_for_each_entry(lsop, &rport->ls_rcv_list, lsrcv_list) { 167714fd1e98SJames Smart if (lsop->handled) 167814fd1e98SJames Smart continue; 167914fd1e98SJames Smart 168014fd1e98SJames Smart lsop->handled = true; 168114fd1e98SJames Smart if (rport->remoteport.port_state == FC_OBJSTATE_ONLINE) { 168214fd1e98SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 168314fd1e98SJames Smart sendrsp = nvme_fc_handle_ls_rqst(lsop); 168414fd1e98SJames Smart } else { 168514fd1e98SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 168614fd1e98SJames Smart w0 = &lsop->rqstbuf->w0; 168714fd1e98SJames Smart lsop->lsrsp->rsplen = nvme_fc_format_rjt( 168814fd1e98SJames Smart lsop->rspbuf, 168914fd1e98SJames Smart sizeof(*lsop->rspbuf), 169014fd1e98SJames Smart w0->ls_cmd, 169114fd1e98SJames Smart FCNVME_RJT_RC_UNAB, 169214fd1e98SJames Smart FCNVME_RJT_EXP_NONE, 0); 169314fd1e98SJames Smart } 169414fd1e98SJames Smart if (sendrsp) 169514fd1e98SJames Smart nvme_fc_xmt_ls_rsp(lsop); 169614fd1e98SJames Smart goto restart; 169714fd1e98SJames Smart } 169814fd1e98SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 169914fd1e98SJames Smart } 170014fd1e98SJames Smart 170172e6329fSJames Smart /** 170272e6329fSJames Smart * nvme_fc_rcv_ls_req - transport entry point called by an LLDD 170372e6329fSJames Smart * upon the reception of a NVME LS request. 170472e6329fSJames Smart * 170572e6329fSJames Smart * The nvme-fc layer will copy payload to an internal structure for 170672e6329fSJames Smart * processing. As such, upon completion of the routine, the LLDD may 170772e6329fSJames Smart * immediately free/reuse the LS request buffer passed in the call. 170872e6329fSJames Smart * 170972e6329fSJames Smart * If this routine returns error, the LLDD should abort the exchange. 171072e6329fSJames Smart * 17112afc4866SChaitanya Kulkarni * @portptr: pointer to the (registered) remote port that the LS 171272e6329fSJames Smart * was received from. The remoteport is associated with 171372e6329fSJames Smart * a specific localport. 171472e6329fSJames Smart * @lsrsp: pointer to a nvmefc_ls_rsp response structure to be 171572e6329fSJames Smart * used to reference the exchange corresponding to the LS 171672e6329fSJames Smart * when issuing an ls response. 171772e6329fSJames Smart * @lsreqbuf: pointer to the buffer containing the LS Request 171872e6329fSJames Smart * @lsreqbuf_len: length, in bytes, of the received LS request 171972e6329fSJames Smart */ 172072e6329fSJames Smart int 172172e6329fSJames Smart nvme_fc_rcv_ls_req(struct nvme_fc_remote_port *portptr, 172272e6329fSJames Smart struct nvmefc_ls_rsp *lsrsp, 172372e6329fSJames Smart void *lsreqbuf, u32 lsreqbuf_len) 172472e6329fSJames Smart { 172572e6329fSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(portptr); 172672e6329fSJames Smart struct nvme_fc_lport *lport = rport->lport; 172714fd1e98SJames Smart struct fcnvme_ls_rqst_w0 *w0 = (struct fcnvme_ls_rqst_w0 *)lsreqbuf; 172814fd1e98SJames Smart struct nvmefc_ls_rcv_op *lsop; 172914fd1e98SJames Smart unsigned long flags; 173014fd1e98SJames Smart int ret; 173114fd1e98SJames Smart 173214fd1e98SJames Smart nvme_fc_rport_get(rport); 173372e6329fSJames Smart 173472e6329fSJames Smart /* validate there's a routine to transmit a response */ 173514fd1e98SJames Smart if (!lport->ops->xmt_ls_rsp) { 173614fd1e98SJames Smart dev_info(lport->dev, 173714fd1e98SJames Smart "RCV %s LS failed: no LLDD xmt_ls_rsp\n", 173814fd1e98SJames Smart (w0->ls_cmd <= NVME_FC_LAST_LS_CMD_VALUE) ? 173914fd1e98SJames Smart nvmefc_ls_names[w0->ls_cmd] : ""); 174014fd1e98SJames Smart ret = -EINVAL; 174114fd1e98SJames Smart goto out_put; 174214fd1e98SJames Smart } 174314fd1e98SJames Smart 174414fd1e98SJames Smart if (lsreqbuf_len > sizeof(union nvmefc_ls_requests)) { 174514fd1e98SJames Smart dev_info(lport->dev, 174614fd1e98SJames Smart "RCV %s LS failed: payload too large\n", 174714fd1e98SJames Smart (w0->ls_cmd <= NVME_FC_LAST_LS_CMD_VALUE) ? 174814fd1e98SJames Smart nvmefc_ls_names[w0->ls_cmd] : ""); 174914fd1e98SJames Smart ret = -E2BIG; 175014fd1e98SJames Smart goto out_put; 175114fd1e98SJames Smart } 175214fd1e98SJames Smart 175314fd1e98SJames Smart lsop = kzalloc(sizeof(*lsop) + 175414fd1e98SJames Smart sizeof(union nvmefc_ls_requests) + 175514fd1e98SJames Smart sizeof(union nvmefc_ls_responses), 175614fd1e98SJames Smart GFP_KERNEL); 175714fd1e98SJames Smart if (!lsop) { 175814fd1e98SJames Smart dev_info(lport->dev, 175914fd1e98SJames Smart "RCV %s LS failed: No memory\n", 176014fd1e98SJames Smart (w0->ls_cmd <= NVME_FC_LAST_LS_CMD_VALUE) ? 176114fd1e98SJames Smart nvmefc_ls_names[w0->ls_cmd] : ""); 176214fd1e98SJames Smart ret = -ENOMEM; 176314fd1e98SJames Smart goto out_put; 176414fd1e98SJames Smart } 176514fd1e98SJames Smart lsop->rqstbuf = (union nvmefc_ls_requests *)&lsop[1]; 176614fd1e98SJames Smart lsop->rspbuf = (union nvmefc_ls_responses *)&lsop->rqstbuf[1]; 176714fd1e98SJames Smart 176814fd1e98SJames Smart lsop->rspdma = fc_dma_map_single(lport->dev, lsop->rspbuf, 176914fd1e98SJames Smart sizeof(*lsop->rspbuf), 177014fd1e98SJames Smart DMA_TO_DEVICE); 177114fd1e98SJames Smart if (fc_dma_mapping_error(lport->dev, lsop->rspdma)) { 177214fd1e98SJames Smart dev_info(lport->dev, 177314fd1e98SJames Smart "RCV %s LS failed: DMA mapping failure\n", 177414fd1e98SJames Smart (w0->ls_cmd <= NVME_FC_LAST_LS_CMD_VALUE) ? 177514fd1e98SJames Smart nvmefc_ls_names[w0->ls_cmd] : ""); 177614fd1e98SJames Smart ret = -EFAULT; 177714fd1e98SJames Smart goto out_free; 177814fd1e98SJames Smart } 177914fd1e98SJames Smart 178014fd1e98SJames Smart lsop->rport = rport; 178114fd1e98SJames Smart lsop->lsrsp = lsrsp; 178214fd1e98SJames Smart 178314fd1e98SJames Smart memcpy(lsop->rqstbuf, lsreqbuf, lsreqbuf_len); 178414fd1e98SJames Smart lsop->rqstdatalen = lsreqbuf_len; 178514fd1e98SJames Smart 178614fd1e98SJames Smart spin_lock_irqsave(&rport->lock, flags); 178714fd1e98SJames Smart if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) { 178814fd1e98SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 178914fd1e98SJames Smart ret = -ENOTCONN; 179014fd1e98SJames Smart goto out_unmap; 179114fd1e98SJames Smart } 179214fd1e98SJames Smart list_add_tail(&lsop->lsrcv_list, &rport->ls_rcv_list); 179314fd1e98SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 179414fd1e98SJames Smart 179514fd1e98SJames Smart schedule_work(&rport->lsrcv_work); 179672e6329fSJames Smart 179772e6329fSJames Smart return 0; 179814fd1e98SJames Smart 179914fd1e98SJames Smart out_unmap: 180014fd1e98SJames Smart fc_dma_unmap_single(lport->dev, lsop->rspdma, 180114fd1e98SJames Smart sizeof(*lsop->rspbuf), DMA_TO_DEVICE); 180214fd1e98SJames Smart out_free: 180314fd1e98SJames Smart kfree(lsop); 180414fd1e98SJames Smart out_put: 180514fd1e98SJames Smart nvme_fc_rport_put(rport); 180614fd1e98SJames Smart return ret; 180772e6329fSJames Smart } 180872e6329fSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_rcv_ls_req); 180972e6329fSJames Smart 1810e399441dSJames Smart 1811e399441dSJames Smart /* *********************** NVME Ctrl Routines **************************** */ 1812e399441dSJames Smart 1813e399441dSJames Smart static void 1814e399441dSJames Smart __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, 1815e399441dSJames Smart struct nvme_fc_fcp_op *op) 1816e399441dSJames Smart { 1817e399441dSJames Smart fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, 1818e399441dSJames Smart sizeof(op->rsp_iu), DMA_FROM_DEVICE); 1819e399441dSJames Smart fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, 1820e399441dSJames Smart sizeof(op->cmd_iu), DMA_TO_DEVICE); 1821e399441dSJames Smart 1822e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_UNINIT); 1823e399441dSJames Smart } 1824e399441dSJames Smart 1825e399441dSJames Smart static void 1826d6296d39SChristoph Hellwig nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq, 1827d6296d39SChristoph Hellwig unsigned int hctx_idx) 1828e399441dSJames Smart { 1829e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1830e399441dSJames Smart 1831d6296d39SChristoph Hellwig return __nvme_fc_exit_request(set->driver_data, op); 1832e399441dSJames Smart } 1833e399441dSJames Smart 183478a7ac26SJames Smart static int 183578a7ac26SJames Smart __nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) 183678a7ac26SJames Smart { 18373efd6e8eSJames Smart unsigned long flags; 18383efd6e8eSJames Smart int opstate; 183978a7ac26SJames Smart 18403efd6e8eSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 18413efd6e8eSJames Smart opstate = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); 18423efd6e8eSJames Smart if (opstate != FCPOP_STATE_ACTIVE) 18433efd6e8eSJames Smart atomic_set(&op->state, opstate); 184452793d62SJames Smart else if (test_bit(FCCTRL_TERMIO, &ctrl->flags)) { 184552793d62SJames Smart op->flags |= FCOP_FLAGS_TERMIO; 18463efd6e8eSJames Smart ctrl->iocnt++; 184752793d62SJames Smart } 18483efd6e8eSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 18493efd6e8eSJames Smart 18503efd6e8eSJames Smart if (opstate != FCPOP_STATE_ACTIVE) 185178a7ac26SJames Smart return -ECANCELED; 185278a7ac26SJames Smart 185378a7ac26SJames Smart ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, 185478a7ac26SJames Smart &ctrl->rport->remoteport, 185578a7ac26SJames Smart op->queue->lldd_handle, 185678a7ac26SJames Smart &op->fcp_req); 185778a7ac26SJames Smart 185878a7ac26SJames Smart return 0; 185978a7ac26SJames Smart } 186078a7ac26SJames Smart 1861e399441dSJames Smart static void 186278a7ac26SJames Smart nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl) 1863e399441dSJames Smart { 1864e399441dSJames Smart struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; 18653efd6e8eSJames Smart int i; 1866e399441dSJames Smart 18674cff280aSJames Smart /* ensure we've initialized the ops once */ 18684cff280aSJames Smart if (!(aen_op->flags & FCOP_FLAGS_AEN)) 18694cff280aSJames Smart return; 18704cff280aSJames Smart 18713efd6e8eSJames Smart for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) 18723efd6e8eSJames Smart __nvme_fc_abort_op(ctrl, aen_op); 187378a7ac26SJames Smart } 187478a7ac26SJames Smart 1875c3aedd22SJames Smart static inline void 187678a7ac26SJames Smart __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl, 18773efd6e8eSJames Smart struct nvme_fc_fcp_op *op, int opstate) 187878a7ac26SJames Smart { 187978a7ac26SJames Smart unsigned long flags; 188078a7ac26SJames Smart 1881c3aedd22SJames Smart if (opstate == FCPOP_STATE_ABORTED) { 188278a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 188352793d62SJames Smart if (test_bit(FCCTRL_TERMIO, &ctrl->flags) && 188452793d62SJames Smart op->flags & FCOP_FLAGS_TERMIO) { 188536715cf4SJames Smart if (!--ctrl->iocnt) 188636715cf4SJames Smart wake_up(&ctrl->ioabort_wait); 188736715cf4SJames Smart } 188878a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 1889c3aedd22SJames Smart } 189078a7ac26SJames Smart } 1891e399441dSJames Smart 1892baee29acSChristoph Hellwig static void 189319fce047SJames Smart nvme_fc_ctrl_ioerr_work(struct work_struct *work) 189419fce047SJames Smart { 189519fce047SJames Smart struct nvme_fc_ctrl *ctrl = 189619fce047SJames Smart container_of(work, struct nvme_fc_ctrl, ioerr_work); 189719fce047SJames Smart 189819fce047SJames Smart nvme_fc_error_recovery(ctrl, "transport detected io error"); 189919fce047SJames Smart } 190019fce047SJames Smart 190119fce047SJames Smart static void 1902e399441dSJames Smart nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) 1903e399441dSJames Smart { 1904e399441dSJames Smart struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); 1905e399441dSJames Smart struct request *rq = op->rq; 1906e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 1907e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 1908e399441dSJames Smart struct nvme_fc_queue *queue = op->queue; 1909e399441dSJames Smart struct nvme_completion *cqe = &op->rsp_iu.cqe; 1910458f280dSJames Smart struct nvme_command *sqe = &op->cmd_iu.sqe; 1911d663b69fSChristoph Hellwig __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1); 191227fa9bc5SChristoph Hellwig union nvme_result result; 19130a02e39fSJames Smart bool terminate_assoc = true; 19143efd6e8eSJames Smart int opstate; 1915e399441dSJames Smart 1916e399441dSJames Smart /* 1917e399441dSJames Smart * WARNING: 1918e399441dSJames Smart * The current linux implementation of a nvme controller 1919e399441dSJames Smart * allocates a single tag set for all io queues and sizes 1920e399441dSJames Smart * the io queues to fully hold all possible tags. Thus, the 1921e399441dSJames Smart * implementation does not reference or care about the sqhd 1922e399441dSJames Smart * value as it never needs to use the sqhd/sqtail pointers 1923e399441dSJames Smart * for submission pacing. 1924e399441dSJames Smart * 1925e399441dSJames Smart * This affects the FC-NVME implementation in two ways: 1926e399441dSJames Smart * 1) As the value doesn't matter, we don't need to waste 1927e399441dSJames Smart * cycles extracting it from ERSPs and stamping it in the 1928e399441dSJames Smart * cases where the transport fabricates CQEs on successful 1929e399441dSJames Smart * completions. 1930e399441dSJames Smart * 2) The FC-NVME implementation requires that delivery of 1931e399441dSJames Smart * ERSP completions are to go back to the nvme layer in order 1932e399441dSJames Smart * relative to the rsn, such that the sqhd value will always 1933e399441dSJames Smart * be "in order" for the nvme layer. As the nvme layer in 1934e399441dSJames Smart * linux doesn't care about sqhd, there's no need to return 1935e399441dSJames Smart * them in order. 1936e399441dSJames Smart * 1937e399441dSJames Smart * Additionally: 1938e399441dSJames Smart * As the core nvme layer in linux currently does not look at 1939e399441dSJames Smart * every field in the cqe - in cases where the FC transport must 1940e399441dSJames Smart * fabricate a CQE, the following fields will not be set as they 1941e399441dSJames Smart * are not referenced: 1942e399441dSJames Smart * cqe.sqid, cqe.sqhd, cqe.command_id 1943f874d5d0SJames Smart * 1944f874d5d0SJames Smart * Failure or error of an individual i/o, in a transport 1945f874d5d0SJames Smart * detected fashion unrelated to the nvme completion status, 1946f874d5d0SJames Smart * potentially cause the initiator and target sides to get out 1947f874d5d0SJames Smart * of sync on SQ head/tail (aka outstanding io count allowed). 1948f874d5d0SJames Smart * Per FC-NVME spec, failure of an individual command requires 1949f874d5d0SJames Smart * the connection to be terminated, which in turn requires the 1950f874d5d0SJames Smart * association to be terminated. 1951e399441dSJames Smart */ 1952e399441dSJames Smart 19533efd6e8eSJames Smart opstate = atomic_xchg(&op->state, FCPOP_STATE_COMPLETE); 19543efd6e8eSJames Smart 1955e399441dSJames Smart fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, 1956e399441dSJames Smart sizeof(op->rsp_iu), DMA_FROM_DEVICE); 1957e399441dSJames Smart 19583efd6e8eSJames Smart if (opstate == FCPOP_STATE_ABORTED) 1959ae3afe63SHannes Reinecke status = cpu_to_le16(NVME_SC_HOST_ABORTED_CMD << 1); 196074bd8cbeSJames Smart else if (freq->status) { 196174bd8cbeSJames Smart status = cpu_to_le16(NVME_SC_HOST_PATH_ERROR << 1); 196274bd8cbeSJames Smart dev_info(ctrl->ctrl.device, 196374bd8cbeSJames Smart "NVME-FC{%d}: io failed due to lldd error %d\n", 196474bd8cbeSJames Smart ctrl->cnum, freq->status); 196574bd8cbeSJames Smart } 1966e399441dSJames Smart 1967e399441dSJames Smart /* 1968e399441dSJames Smart * For the linux implementation, if we have an unsuccesful 1969e399441dSJames Smart * status, they blk-mq layer can typically be called with the 1970e399441dSJames Smart * non-zero status and the content of the cqe isn't important. 1971e399441dSJames Smart */ 1972e399441dSJames Smart if (status) 1973e399441dSJames Smart goto done; 1974e399441dSJames Smart 1975e399441dSJames Smart /* 1976e399441dSJames Smart * command completed successfully relative to the wire 1977e399441dSJames Smart * protocol. However, validate anything received and 1978e399441dSJames Smart * extract the status and result from the cqe (create it 1979e399441dSJames Smart * where necessary). 1980e399441dSJames Smart */ 1981e399441dSJames Smart 1982e399441dSJames Smart switch (freq->rcv_rsplen) { 1983e399441dSJames Smart 1984e399441dSJames Smart case 0: 1985e399441dSJames Smart case NVME_FC_SIZEOF_ZEROS_RSP: 1986e399441dSJames Smart /* 1987e399441dSJames Smart * No response payload or 12 bytes of payload (which 1988e399441dSJames Smart * should all be zeros) are considered successful and 1989e399441dSJames Smart * no payload in the CQE by the transport. 1990e399441dSJames Smart */ 1991e399441dSJames Smart if (freq->transferred_length != 1992e399441dSJames Smart be32_to_cpu(op->cmd_iu.data_len)) { 199374bd8cbeSJames Smart status = cpu_to_le16(NVME_SC_HOST_PATH_ERROR << 1); 199474bd8cbeSJames Smart dev_info(ctrl->ctrl.device, 199574bd8cbeSJames Smart "NVME-FC{%d}: io failed due to bad transfer " 199674bd8cbeSJames Smart "length: %d vs expected %d\n", 199774bd8cbeSJames Smart ctrl->cnum, freq->transferred_length, 199874bd8cbeSJames Smart be32_to_cpu(op->cmd_iu.data_len)); 1999e399441dSJames Smart goto done; 2000e399441dSJames Smart } 200127fa9bc5SChristoph Hellwig result.u64 = 0; 2002e399441dSJames Smart break; 2003e399441dSJames Smart 2004e399441dSJames Smart case sizeof(struct nvme_fc_ersp_iu): 2005e399441dSJames Smart /* 2006e399441dSJames Smart * The ERSP IU contains a full completion with CQE. 2007e399441dSJames Smart * Validate ERSP IU and look at cqe. 2008e399441dSJames Smart */ 2009e399441dSJames Smart if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != 2010e399441dSJames Smart (freq->rcv_rsplen / 4) || 2011e399441dSJames Smart be32_to_cpu(op->rsp_iu.xfrd_len) != 2012e399441dSJames Smart freq->transferred_length || 201353b2b2f5SJames Smart op->rsp_iu.ersp_result || 2014458f280dSJames Smart sqe->common.command_id != cqe->command_id)) { 201574bd8cbeSJames Smart status = cpu_to_le16(NVME_SC_HOST_PATH_ERROR << 1); 201674bd8cbeSJames Smart dev_info(ctrl->ctrl.device, 201774bd8cbeSJames Smart "NVME-FC{%d}: io failed due to bad NVMe_ERSP: " 201874bd8cbeSJames Smart "iu len %d, xfr len %d vs %d, status code " 201974bd8cbeSJames Smart "%d, cmdid %d vs %d\n", 202074bd8cbeSJames Smart ctrl->cnum, be16_to_cpu(op->rsp_iu.iu_len), 202174bd8cbeSJames Smart be32_to_cpu(op->rsp_iu.xfrd_len), 202274bd8cbeSJames Smart freq->transferred_length, 202353b2b2f5SJames Smart op->rsp_iu.ersp_result, 202474bd8cbeSJames Smart sqe->common.command_id, 202574bd8cbeSJames Smart cqe->command_id); 2026e399441dSJames Smart goto done; 2027e399441dSJames Smart } 202827fa9bc5SChristoph Hellwig result = cqe->result; 2029d663b69fSChristoph Hellwig status = cqe->status; 2030e399441dSJames Smart break; 2031e399441dSJames Smart 2032e399441dSJames Smart default: 203374bd8cbeSJames Smart status = cpu_to_le16(NVME_SC_HOST_PATH_ERROR << 1); 203474bd8cbeSJames Smart dev_info(ctrl->ctrl.device, 203574bd8cbeSJames Smart "NVME-FC{%d}: io failed due to odd NVMe_xRSP iu " 203674bd8cbeSJames Smart "len %d\n", 203774bd8cbeSJames Smart ctrl->cnum, freq->rcv_rsplen); 2038e399441dSJames Smart goto done; 2039e399441dSJames Smart } 2040e399441dSJames Smart 2041f874d5d0SJames Smart terminate_assoc = false; 2042f874d5d0SJames Smart 2043e399441dSJames Smart done: 204478a7ac26SJames Smart if (op->flags & FCOP_FLAGS_AEN) { 204527fa9bc5SChristoph Hellwig nvme_complete_async_event(&queue->ctrl->ctrl, status, &result); 20463efd6e8eSJames Smart __nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate); 204778a7ac26SJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 204878a7ac26SJames Smart op->flags = FCOP_FLAGS_AEN; /* clear other flags */ 2049e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2050f874d5d0SJames Smart goto check_error; 2051e399441dSJames Smart } 2052e399441dSJames Smart 2053c3aedd22SJames Smart __nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate); 20542eb81a33SChristoph Hellwig if (!nvme_try_complete_req(rq, status, result)) 2055ff029451SChristoph Hellwig nvme_fc_complete_rq(rq); 2056f874d5d0SJames Smart 2057f874d5d0SJames Smart check_error: 2058f20ef34dSJames Smart if (terminate_assoc && ctrl->ctrl.state != NVME_CTRL_RESETTING) 205919fce047SJames Smart queue_work(nvme_reset_wq, &ctrl->ioerr_work); 2060e399441dSJames Smart } 2061e399441dSJames Smart 2062e399441dSJames Smart static int 2063e399441dSJames Smart __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, 2064e399441dSJames Smart struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, 2065e399441dSJames Smart struct request *rq, u32 rqno) 2066e399441dSJames Smart { 2067d3d0bc78SBart Van Assche struct nvme_fcp_op_w_sgl *op_w_sgl = 2068d3d0bc78SBart Van Assche container_of(op, typeof(*op_w_sgl), op); 2069e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 2070e399441dSJames Smart int ret = 0; 2071e399441dSJames Smart 2072e399441dSJames Smart memset(op, 0, sizeof(*op)); 2073e399441dSJames Smart op->fcp_req.cmdaddr = &op->cmd_iu; 2074e399441dSJames Smart op->fcp_req.cmdlen = sizeof(op->cmd_iu); 2075e399441dSJames Smart op->fcp_req.rspaddr = &op->rsp_iu; 2076e399441dSJames Smart op->fcp_req.rsplen = sizeof(op->rsp_iu); 2077e399441dSJames Smart op->fcp_req.done = nvme_fc_fcpio_done; 2078e399441dSJames Smart op->ctrl = ctrl; 2079e399441dSJames Smart op->queue = queue; 2080e399441dSJames Smart op->rq = rq; 2081e399441dSJames Smart op->rqno = rqno; 2082e399441dSJames Smart 208353b2b2f5SJames Smart cmdiu->format_id = NVME_CMD_FORMAT_ID; 2084e399441dSJames Smart cmdiu->fc_id = NVME_CMD_FC_ID; 2085e399441dSJames Smart cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); 208644fbf3bbSJames Smart if (queue->qnum) 208744fbf3bbSJames Smart cmdiu->rsv_cat = fccmnd_set_cat_css(0, 208844fbf3bbSJames Smart (NVME_CC_CSS_NVM >> NVME_CC_CSS_SHIFT)); 208944fbf3bbSJames Smart else 209044fbf3bbSJames Smart cmdiu->rsv_cat = fccmnd_set_cat_admin(0); 2091e399441dSJames Smart 2092e399441dSJames Smart op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, 2093e399441dSJames Smart &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); 2094e399441dSJames Smart if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { 2095e399441dSJames Smart dev_err(ctrl->dev, 2096e399441dSJames Smart "FCP Op failed - cmdiu dma mapping failed.\n"); 2097f34448cdSTianjia Zhang ret = -EFAULT; 2098e399441dSJames Smart goto out_on_error; 2099e399441dSJames Smart } 2100e399441dSJames Smart 2101e399441dSJames Smart op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, 2102e399441dSJames Smart &op->rsp_iu, sizeof(op->rsp_iu), 2103e399441dSJames Smart DMA_FROM_DEVICE); 2104e399441dSJames Smart if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { 2105e399441dSJames Smart dev_err(ctrl->dev, 2106e399441dSJames Smart "FCP Op failed - rspiu dma mapping failed.\n"); 2107f34448cdSTianjia Zhang ret = -EFAULT; 2108e399441dSJames Smart } 2109e399441dSJames Smart 2110e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 2111e399441dSJames Smart out_on_error: 2112e399441dSJames Smart return ret; 2113e399441dSJames Smart } 2114e399441dSJames Smart 2115e399441dSJames Smart static int 2116d6296d39SChristoph Hellwig nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, 2117d6296d39SChristoph Hellwig unsigned int hctx_idx, unsigned int numa_node) 2118e399441dSJames Smart { 2119d6296d39SChristoph Hellwig struct nvme_fc_ctrl *ctrl = set->driver_data; 2120d3d0bc78SBart Van Assche struct nvme_fcp_op_w_sgl *op = blk_mq_rq_to_pdu(rq); 212176f983cbSChristoph Hellwig int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; 212276f983cbSChristoph Hellwig struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; 21230d2bdf9fSBart Van Assche int res; 2124e399441dSJames Smart 21250d2bdf9fSBart Van Assche res = __nvme_fc_init_request(ctrl, queue, &op->op, rq, queue->rqcnt++); 21260d2bdf9fSBart Van Assche if (res) 21270d2bdf9fSBart Van Assche return res; 21283add1d93SArnd Bergmann op->op.fcp_req.first_sgl = op->sgl; 2129d19b8bc8SJames Smart op->op.fcp_req.private = &op->priv[0]; 2130dfa74422SEwan D. Milne nvme_req(rq)->ctrl = &ctrl->ctrl; 2131f4b9e6c9SKeith Busch nvme_req(rq)->cmd = &op->op.cmd_iu.sqe; 21320d2bdf9fSBart Van Assche return res; 2133e399441dSJames Smart } 2134e399441dSJames Smart 2135e399441dSJames Smart static int 2136e399441dSJames Smart nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) 2137e399441dSJames Smart { 2138e399441dSJames Smart struct nvme_fc_fcp_op *aen_op; 2139e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu; 2140e399441dSJames Smart struct nvme_command *sqe; 2141f56bf76fSJames Smart void *private = NULL; 2142e399441dSJames Smart int i, ret; 2143e399441dSJames Smart 2144e399441dSJames Smart aen_op = ctrl->aen_ops; 214538dabe21SKeith Busch for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { 2146f56bf76fSJames Smart if (ctrl->lport->ops->fcprqst_priv_sz) { 214761bff8efSJames Smart private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz, 214861bff8efSJames Smart GFP_KERNEL); 214961bff8efSJames Smart if (!private) 215061bff8efSJames Smart return -ENOMEM; 2151f56bf76fSJames Smart } 215261bff8efSJames Smart 2153e399441dSJames Smart cmdiu = &aen_op->cmd_iu; 2154e399441dSJames Smart sqe = &cmdiu->sqe; 2155e399441dSJames Smart ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], 2156e399441dSJames Smart aen_op, (struct request *)NULL, 215738dabe21SKeith Busch (NVME_AQ_BLK_MQ_DEPTH + i)); 215861bff8efSJames Smart if (ret) { 215961bff8efSJames Smart kfree(private); 2160e399441dSJames Smart return ret; 216161bff8efSJames Smart } 2162e399441dSJames Smart 216378a7ac26SJames Smart aen_op->flags = FCOP_FLAGS_AEN; 216461bff8efSJames Smart aen_op->fcp_req.private = private; 216578a7ac26SJames Smart 2166e399441dSJames Smart memset(sqe, 0, sizeof(*sqe)); 2167e399441dSJames Smart sqe->common.opcode = nvme_admin_async_event; 216878a7ac26SJames Smart /* Note: core layer may overwrite the sqe.command_id value */ 216938dabe21SKeith Busch sqe->common.command_id = NVME_AQ_BLK_MQ_DEPTH + i; 2170e399441dSJames Smart } 2171e399441dSJames Smart return 0; 2172e399441dSJames Smart } 2173e399441dSJames Smart 217461bff8efSJames Smart static void 217561bff8efSJames Smart nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl) 217661bff8efSJames Smart { 217761bff8efSJames Smart struct nvme_fc_fcp_op *aen_op; 217861bff8efSJames Smart int i; 217961bff8efSJames Smart 2180e126e821SDavid Milburn cancel_work_sync(&ctrl->ctrl.async_event_work); 218161bff8efSJames Smart aen_op = ctrl->aen_ops; 218238dabe21SKeith Busch for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { 218361bff8efSJames Smart __nvme_fc_exit_request(ctrl, aen_op); 218461bff8efSJames Smart 218561bff8efSJames Smart kfree(aen_op->fcp_req.private); 218661bff8efSJames Smart aen_op->fcp_req.private = NULL; 218761bff8efSJames Smart } 218861bff8efSJames Smart } 2189e399441dSJames Smart 2190e399441dSJames Smart static inline void 2191e399441dSJames Smart __nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, 2192e399441dSJames Smart unsigned int qidx) 2193e399441dSJames Smart { 2194e399441dSJames Smart struct nvme_fc_queue *queue = &ctrl->queues[qidx]; 2195e399441dSJames Smart 2196e399441dSJames Smart hctx->driver_data = queue; 2197e399441dSJames Smart queue->hctx = hctx; 2198e399441dSJames Smart } 2199e399441dSJames Smart 2200e399441dSJames Smart static int 2201e399441dSJames Smart nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 2202e399441dSJames Smart unsigned int hctx_idx) 2203e399441dSJames Smart { 2204e399441dSJames Smart struct nvme_fc_ctrl *ctrl = data; 2205e399441dSJames Smart 2206e399441dSJames Smart __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); 2207e399441dSJames Smart 2208e399441dSJames Smart return 0; 2209e399441dSJames Smart } 2210e399441dSJames Smart 2211e399441dSJames Smart static int 2212e399441dSJames Smart nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, 2213e399441dSJames Smart unsigned int hctx_idx) 2214e399441dSJames Smart { 2215e399441dSJames Smart struct nvme_fc_ctrl *ctrl = data; 2216e399441dSJames Smart 2217e399441dSJames Smart __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); 2218e399441dSJames Smart 2219e399441dSJames Smart return 0; 2220e399441dSJames Smart } 2221e399441dSJames Smart 2222e399441dSJames Smart static void 222308e15075SKeith Busch nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx) 2224e399441dSJames Smart { 2225e399441dSJames Smart struct nvme_fc_queue *queue; 2226e399441dSJames Smart 2227e399441dSJames Smart queue = &ctrl->queues[idx]; 2228e399441dSJames Smart memset(queue, 0, sizeof(*queue)); 2229e399441dSJames Smart queue->ctrl = ctrl; 2230e399441dSJames Smart queue->qnum = idx; 223167f471b6SJames Smart atomic_set(&queue->csn, 0); 2232e399441dSJames Smart queue->dev = ctrl->dev; 2233e399441dSJames Smart 2234e399441dSJames Smart if (idx > 0) 2235e399441dSJames Smart queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; 2236e399441dSJames Smart else 2237e399441dSJames Smart queue->cmnd_capsule_len = sizeof(struct nvme_command); 2238e399441dSJames Smart 2239e399441dSJames Smart /* 2240e399441dSJames Smart * Considered whether we should allocate buffers for all SQEs 2241e399441dSJames Smart * and CQEs and dma map them - mapping their respective entries 2242e399441dSJames Smart * into the request structures (kernel vm addr and dma address) 2243e399441dSJames Smart * thus the driver could use the buffers/mappings directly. 2244e399441dSJames Smart * It only makes sense if the LLDD would use them for its 2245e399441dSJames Smart * messaging api. It's very unlikely most adapter api's would use 2246e399441dSJames Smart * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload 2247e399441dSJames Smart * structures were used instead. 2248e399441dSJames Smart */ 2249e399441dSJames Smart } 2250e399441dSJames Smart 2251e399441dSJames Smart /* 2252e399441dSJames Smart * This routine terminates a queue at the transport level. 2253e399441dSJames Smart * The transport has already ensured that all outstanding ios on 2254e399441dSJames Smart * the queue have been terminated. 2255e399441dSJames Smart * The transport will send a Disconnect LS request to terminate 2256e399441dSJames Smart * the queue's connection. Termination of the admin queue will also 2257e399441dSJames Smart * terminate the association at the target. 2258e399441dSJames Smart */ 2259e399441dSJames Smart static void 2260e399441dSJames Smart nvme_fc_free_queue(struct nvme_fc_queue *queue) 2261e399441dSJames Smart { 2262e399441dSJames Smart if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) 2263e399441dSJames Smart return; 2264e399441dSJames Smart 22659e0ed16aSSagi Grimberg clear_bit(NVME_FC_Q_LIVE, &queue->flags); 2266e399441dSJames Smart /* 2267e399441dSJames Smart * Current implementation never disconnects a single queue. 2268e399441dSJames Smart * It always terminates a whole association. So there is never 2269e399441dSJames Smart * a disconnect(queue) LS sent to the target. 2270e399441dSJames Smart */ 2271e399441dSJames Smart 2272e399441dSJames Smart queue->connection_id = 0; 227367f471b6SJames Smart atomic_set(&queue->csn, 0); 2274e399441dSJames Smart } 2275e399441dSJames Smart 2276e399441dSJames Smart static void 2277e399441dSJames Smart __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, 2278e399441dSJames Smart struct nvme_fc_queue *queue, unsigned int qidx) 2279e399441dSJames Smart { 2280e399441dSJames Smart if (ctrl->lport->ops->delete_queue) 2281e399441dSJames Smart ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, 2282e399441dSJames Smart queue->lldd_handle); 2283e399441dSJames Smart queue->lldd_handle = NULL; 2284e399441dSJames Smart } 2285e399441dSJames Smart 2286e399441dSJames Smart static void 2287e399441dSJames Smart nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) 2288e399441dSJames Smart { 2289e399441dSJames Smart int i; 2290e399441dSJames Smart 2291d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) 2292e399441dSJames Smart nvme_fc_free_queue(&ctrl->queues[i]); 2293e399441dSJames Smart } 2294e399441dSJames Smart 2295e399441dSJames Smart static int 2296e399441dSJames Smart __nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, 2297e399441dSJames Smart struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) 2298e399441dSJames Smart { 2299e399441dSJames Smart int ret = 0; 2300e399441dSJames Smart 2301e399441dSJames Smart queue->lldd_handle = NULL; 2302e399441dSJames Smart if (ctrl->lport->ops->create_queue) 2303e399441dSJames Smart ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, 2304e399441dSJames Smart qidx, qsize, &queue->lldd_handle); 2305e399441dSJames Smart 2306e399441dSJames Smart return ret; 2307e399441dSJames Smart } 2308e399441dSJames Smart 2309e399441dSJames Smart static void 2310e399441dSJames Smart nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) 2311e399441dSJames Smart { 2312d858e5f0SSagi Grimberg struct nvme_fc_queue *queue = &ctrl->queues[ctrl->ctrl.queue_count - 1]; 2313e399441dSJames Smart int i; 2314e399441dSJames Smart 2315d858e5f0SSagi Grimberg for (i = ctrl->ctrl.queue_count - 1; i >= 1; i--, queue--) 2316e399441dSJames Smart __nvme_fc_delete_hw_queue(ctrl, queue, i); 2317e399441dSJames Smart } 2318e399441dSJames Smart 2319e399441dSJames Smart static int 2320e399441dSJames Smart nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) 2321e399441dSJames Smart { 2322e399441dSJames Smart struct nvme_fc_queue *queue = &ctrl->queues[1]; 232317a1ec08SJohannes Thumshirn int i, ret; 2324e399441dSJames Smart 2325d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++, queue++) { 2326e399441dSJames Smart ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); 232717a1ec08SJohannes Thumshirn if (ret) 232817a1ec08SJohannes Thumshirn goto delete_queues; 2329e399441dSJames Smart } 2330e399441dSJames Smart 2331e399441dSJames Smart return 0; 233217a1ec08SJohannes Thumshirn 233317a1ec08SJohannes Thumshirn delete_queues: 2334514a6dc9SJames Smart for (; i > 0; i--) 233517a1ec08SJohannes Thumshirn __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[i], i); 233617a1ec08SJohannes Thumshirn return ret; 2337e399441dSJames Smart } 2338e399441dSJames Smart 2339e399441dSJames Smart static int 2340e399441dSJames Smart nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) 2341e399441dSJames Smart { 2342e399441dSJames Smart int i, ret = 0; 2343e399441dSJames Smart 2344d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) { 2345e399441dSJames Smart ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, 2346e399441dSJames Smart (qsize / 5)); 2347e399441dSJames Smart if (ret) 2348e399441dSJames Smart break; 2349*be42a33bSKeith Busch ret = nvmf_connect_io_queue(&ctrl->ctrl, i); 2350e399441dSJames Smart if (ret) 2351e399441dSJames Smart break; 23529e0ed16aSSagi Grimberg 23539e0ed16aSSagi Grimberg set_bit(NVME_FC_Q_LIVE, &ctrl->queues[i].flags); 2354e399441dSJames Smart } 2355e399441dSJames Smart 2356e399441dSJames Smart return ret; 2357e399441dSJames Smart } 2358e399441dSJames Smart 2359e399441dSJames Smart static void 2360e399441dSJames Smart nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) 2361e399441dSJames Smart { 2362e399441dSJames Smart int i; 2363e399441dSJames Smart 2364d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) 236508e15075SKeith Busch nvme_fc_init_queue(ctrl, i); 2366e399441dSJames Smart } 2367e399441dSJames Smart 2368e399441dSJames Smart static void 2369e399441dSJames Smart nvme_fc_ctrl_free(struct kref *ref) 2370e399441dSJames Smart { 2371e399441dSJames Smart struct nvme_fc_ctrl *ctrl = 2372e399441dSJames Smart container_of(ref, struct nvme_fc_ctrl, ref); 2373e399441dSJames Smart unsigned long flags; 2374e399441dSJames Smart 237561bff8efSJames Smart if (ctrl->ctrl.tagset) { 237661bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.connect_q); 237761bff8efSJames Smart blk_mq_free_tag_set(&ctrl->tag_set); 237861bff8efSJames Smart } 237961bff8efSJames Smart 2380e399441dSJames Smart /* remove from rport list */ 2381e399441dSJames Smart spin_lock_irqsave(&ctrl->rport->lock, flags); 2382e399441dSJames Smart list_del(&ctrl->ctrl_list); 2383e399441dSJames Smart spin_unlock_irqrestore(&ctrl->rport->lock, flags); 238461bff8efSJames Smart 2385f9c5af5fSSagi Grimberg blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 238661bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.admin_q); 2387e7832cb4SSagi Grimberg blk_cleanup_queue(ctrl->ctrl.fabrics_q); 238861bff8efSJames Smart blk_mq_free_tag_set(&ctrl->admin_tag_set); 238961bff8efSJames Smart 239061bff8efSJames Smart kfree(ctrl->queues); 2391e399441dSJames Smart 2392e399441dSJames Smart put_device(ctrl->dev); 2393e399441dSJames Smart nvme_fc_rport_put(ctrl->rport); 2394e399441dSJames Smart 2395e399441dSJames Smart ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); 2396de41447aSEwan D. Milne if (ctrl->ctrl.opts) 2397e399441dSJames Smart nvmf_free_options(ctrl->ctrl.opts); 2398e399441dSJames Smart kfree(ctrl); 2399e399441dSJames Smart } 2400e399441dSJames Smart 2401e399441dSJames Smart static void 2402e399441dSJames Smart nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) 2403e399441dSJames Smart { 2404e399441dSJames Smart kref_put(&ctrl->ref, nvme_fc_ctrl_free); 2405e399441dSJames Smart } 2406e399441dSJames Smart 2407e399441dSJames Smart static int 2408e399441dSJames Smart nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) 2409e399441dSJames Smart { 2410e399441dSJames Smart return kref_get_unless_zero(&ctrl->ref); 2411e399441dSJames Smart } 2412e399441dSJames Smart 2413e399441dSJames Smart /* 2414e399441dSJames Smart * All accesses from nvme core layer done - can now free the 2415e399441dSJames Smart * controller. Called after last nvme_put_ctrl() call 2416e399441dSJames Smart */ 2417e399441dSJames Smart static void 241861bff8efSJames Smart nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl) 2419e399441dSJames Smart { 2420e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 2421e399441dSJames Smart 2422e399441dSJames Smart WARN_ON(nctrl != &ctrl->ctrl); 2423e399441dSJames Smart 2424e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2425e399441dSJames Smart } 2426e399441dSJames Smart 242795ced8a2SJames Smart /* 242895ced8a2SJames Smart * This routine is used by the transport when it needs to find active 242995ced8a2SJames Smart * io on a queue that is to be terminated. The transport uses 243095ced8a2SJames Smart * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke 243195ced8a2SJames Smart * this routine to kill them on a 1 by 1 basis. 243295ced8a2SJames Smart * 243395ced8a2SJames Smart * As FC allocates FC exchange for each io, the transport must contact 243495ced8a2SJames Smart * the LLDD to terminate the exchange, thus releasing the FC exchange. 243595ced8a2SJames Smart * After terminating the exchange the LLDD will call the transport's 243695ced8a2SJames Smart * normal io done path for the request, but it will have an aborted 243795ced8a2SJames Smart * status. The done path will return the io request back to the block 243895ced8a2SJames Smart * layer with an error status. 243995ced8a2SJames Smart */ 244095ced8a2SJames Smart static bool 244195ced8a2SJames Smart nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) 244295ced8a2SJames Smart { 244395ced8a2SJames Smart struct nvme_ctrl *nctrl = data; 244495ced8a2SJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 244595ced8a2SJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); 244695ced8a2SJames Smart 24473c7aafbcSHannes Reinecke op->nreq.flags |= NVME_REQ_CANCELLED; 244895ced8a2SJames Smart __nvme_fc_abort_op(ctrl, op); 244995ced8a2SJames Smart return true; 245095ced8a2SJames Smart } 245195ced8a2SJames Smart 245295ced8a2SJames Smart /* 245395ced8a2SJames Smart * This routine runs through all outstanding commands on the association 245495ced8a2SJames Smart * and aborts them. This routine is typically be called by the 245595ced8a2SJames Smart * delete_association routine. It is also called due to an error during 245695ced8a2SJames Smart * reconnect. In that scenario, it is most likely a command that initializes 245795ced8a2SJames Smart * the controller, including fabric Connect commands on io queues, that 245895ced8a2SJames Smart * may have timed out or failed thus the io must be killed for the connect 245995ced8a2SJames Smart * thread to see the error. 246095ced8a2SJames Smart */ 246195ced8a2SJames Smart static void 246295ced8a2SJames Smart __nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues) 246395ced8a2SJames Smart { 2464a7d13914SJames Smart int q; 2465a7d13914SJames Smart 2466a7d13914SJames Smart /* 2467a7d13914SJames Smart * if aborting io, the queues are no longer good, mark them 2468a7d13914SJames Smart * all as not live. 2469a7d13914SJames Smart */ 2470a7d13914SJames Smart if (ctrl->ctrl.queue_count > 1) { 2471a7d13914SJames Smart for (q = 1; q < ctrl->ctrl.queue_count; q++) 2472a7d13914SJames Smart clear_bit(NVME_FC_Q_LIVE, &ctrl->queues[q].flags); 2473a7d13914SJames Smart } 2474a7d13914SJames Smart clear_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags); 2475a7d13914SJames Smart 247695ced8a2SJames Smart /* 247795ced8a2SJames Smart * If io queues are present, stop them and terminate all outstanding 247895ced8a2SJames Smart * ios on them. As FC allocates FC exchange for each io, the 247995ced8a2SJames Smart * transport must contact the LLDD to terminate the exchange, 248095ced8a2SJames Smart * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() 248195ced8a2SJames Smart * to tell us what io's are busy and invoke a transport routine 248295ced8a2SJames Smart * to kill them with the LLDD. After terminating the exchange 248395ced8a2SJames Smart * the LLDD will call the transport's normal io done path, but it 248495ced8a2SJames Smart * will have an aborted status. The done path will return the 248595ced8a2SJames Smart * io requests back to the block layer as part of normal completions 248695ced8a2SJames Smart * (but with error status). 248795ced8a2SJames Smart */ 248895ced8a2SJames Smart if (ctrl->ctrl.queue_count > 1) { 248995ced8a2SJames Smart nvme_stop_queues(&ctrl->ctrl); 249095ced8a2SJames Smart blk_mq_tagset_busy_iter(&ctrl->tag_set, 249195ced8a2SJames Smart nvme_fc_terminate_exchange, &ctrl->ctrl); 249295ced8a2SJames Smart blk_mq_tagset_wait_completed_request(&ctrl->tag_set); 249395ced8a2SJames Smart if (start_queues) 249495ced8a2SJames Smart nvme_start_queues(&ctrl->ctrl); 249595ced8a2SJames Smart } 249695ced8a2SJames Smart 249795ced8a2SJames Smart /* 249895ced8a2SJames Smart * Other transports, which don't have link-level contexts bound 249995ced8a2SJames Smart * to sqe's, would try to gracefully shutdown the controller by 250095ced8a2SJames Smart * writing the registers for shutdown and polling (call 250195ced8a2SJames Smart * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially 250295ced8a2SJames Smart * just aborted and we will wait on those contexts, and given 250395ced8a2SJames Smart * there was no indication of how live the controlelr is on the 250495ced8a2SJames Smart * link, don't send more io to create more contexts for the 250595ced8a2SJames Smart * shutdown. Let the controller fail via keepalive failure if 250695ced8a2SJames Smart * its still present. 250795ced8a2SJames Smart */ 250895ced8a2SJames Smart 250995ced8a2SJames Smart /* 251095ced8a2SJames Smart * clean up the admin queue. Same thing as above. 251195ced8a2SJames Smart */ 251295ced8a2SJames Smart blk_mq_quiesce_queue(ctrl->ctrl.admin_q); 251395ced8a2SJames Smart blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, 251495ced8a2SJames Smart nvme_fc_terminate_exchange, &ctrl->ctrl); 251595ced8a2SJames Smart blk_mq_tagset_wait_completed_request(&ctrl->admin_tag_set); 251695ced8a2SJames Smart } 25179c2bb257SJames Smart 251861bff8efSJames Smart static void 251961bff8efSJames Smart nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) 252061bff8efSJames Smart { 25214cff280aSJames Smart /* 252295ced8a2SJames Smart * if an error (io timeout, etc) while (re)connecting, the remote 252395ced8a2SJames Smart * port requested terminating of the association (disconnect_ls) 252495ced8a2SJames Smart * or an error (timeout or abort) occurred on an io while creating 252595ced8a2SJames Smart * the controller. Abort any ios on the association and let the 252695ced8a2SJames Smart * create_association error path resolve things. 25274cff280aSJames Smart */ 25284cff280aSJames Smart if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) { 252995ced8a2SJames Smart __nvme_fc_abort_outstanding_ios(ctrl, true); 253095ced8a2SJames Smart set_bit(ASSOC_FAILED, &ctrl->flags); 25314cff280aSJames Smart return; 25324cff280aSJames Smart } 25334cff280aSJames Smart 25344cff280aSJames Smart /* Otherwise, only proceed if in LIVE state - e.g. on first error */ 253569fa9646SJames Smart if (ctrl->ctrl.state != NVME_CTRL_LIVE) 253669fa9646SJames Smart return; 253769fa9646SJames Smart 253861bff8efSJames Smart dev_warn(ctrl->ctrl.device, 2539514a6dc9SJames Smart "NVME-FC{%d}: transport association event: %s\n", 254061bff8efSJames Smart ctrl->cnum, errmsg); 2541589ff775SJames Smart dev_warn(ctrl->ctrl.device, 254261bff8efSJames Smart "NVME-FC{%d}: resetting controller\n", ctrl->cnum); 254361bff8efSJames Smart 2544d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&ctrl->ctrl); 254561bff8efSJames Smart } 254661bff8efSJames Smart 2547baee29acSChristoph Hellwig static enum blk_eh_timer_return 2548e399441dSJames Smart nvme_fc_timeout(struct request *rq, bool reserved) 2549e399441dSJames Smart { 2550e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2551e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 255252793d62SJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 255352793d62SJames Smart struct nvme_command *sqe = &cmdiu->sqe; 2554e399441dSJames Smart 2555e399441dSJames Smart /* 255652793d62SJames Smart * Attempt to abort the offending command. Command completion 255752793d62SJames Smart * will detect the aborted io and will fail the connection. 2558e399441dSJames Smart */ 255952793d62SJames Smart dev_info(ctrl->ctrl.device, 256052793d62SJames Smart "NVME-FC{%d.%d}: io timeout: opcode %d fctype %d w10/11: " 256152793d62SJames Smart "x%08x/x%08x\n", 256252793d62SJames Smart ctrl->cnum, op->queue->qnum, sqe->common.opcode, 256352793d62SJames Smart sqe->connect.fctype, sqe->common.cdw10, sqe->common.cdw11); 256452793d62SJames Smart if (__nvme_fc_abort_op(ctrl, op)) 256552793d62SJames Smart nvme_fc_error_recovery(ctrl, "io timeout abort failed"); 2566e399441dSJames Smart 2567134aedc9SJames Smart /* 2568134aedc9SJames Smart * the io abort has been initiated. Have the reset timer 2569134aedc9SJames Smart * restarted and the abort completion will complete the io 2570134aedc9SJames Smart * shortly. Avoids a synchronous wait while the abort finishes. 2571134aedc9SJames Smart */ 2572134aedc9SJames Smart return BLK_EH_RESET_TIMER; 2573e399441dSJames Smart } 2574e399441dSJames Smart 2575e399441dSJames Smart static int 2576e399441dSJames Smart nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, 2577e399441dSJames Smart struct nvme_fc_fcp_op *op) 2578e399441dSJames Smart { 2579e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 2580e399441dSJames Smart int ret; 2581e399441dSJames Smart 2582e399441dSJames Smart freq->sg_cnt = 0; 2583e399441dSJames Smart 25849f7d8ae2SJames Smart if (!blk_rq_nr_phys_segments(rq)) 2585e399441dSJames Smart return 0; 2586e399441dSJames Smart 2587e399441dSJames Smart freq->sg_table.sgl = freq->first_sgl; 258819e420bbSChristoph Hellwig ret = sg_alloc_table_chained(&freq->sg_table, 25894635873cSMing Lei blk_rq_nr_phys_segments(rq), freq->sg_table.sgl, 2590b1ae1a23SIsrael Rukshin NVME_INLINE_SG_CNT); 2591e399441dSJames Smart if (ret) 2592e399441dSJames Smart return -ENOMEM; 2593e399441dSJames Smart 2594e399441dSJames Smart op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); 259519e420bbSChristoph Hellwig WARN_ON(op->nents > blk_rq_nr_phys_segments(rq)); 2596e399441dSJames Smart freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, 2597f15872c5SIsrael Rukshin op->nents, rq_dma_dir(rq)); 2598e399441dSJames Smart if (unlikely(freq->sg_cnt <= 0)) { 2599b1ae1a23SIsrael Rukshin sg_free_table_chained(&freq->sg_table, NVME_INLINE_SG_CNT); 2600e399441dSJames Smart freq->sg_cnt = 0; 2601e399441dSJames Smart return -EFAULT; 2602e399441dSJames Smart } 2603e399441dSJames Smart 2604e399441dSJames Smart /* 2605e399441dSJames Smart * TODO: blk_integrity_rq(rq) for DIF 2606e399441dSJames Smart */ 2607e399441dSJames Smart return 0; 2608e399441dSJames Smart } 2609e399441dSJames Smart 2610e399441dSJames Smart static void 2611e399441dSJames Smart nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, 2612e399441dSJames Smart struct nvme_fc_fcp_op *op) 2613e399441dSJames Smart { 2614e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 2615e399441dSJames Smart 2616e399441dSJames Smart if (!freq->sg_cnt) 2617e399441dSJames Smart return; 2618e399441dSJames Smart 2619e399441dSJames Smart fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, 2620f15872c5SIsrael Rukshin rq_dma_dir(rq)); 2621e399441dSJames Smart 2622b1ae1a23SIsrael Rukshin sg_free_table_chained(&freq->sg_table, NVME_INLINE_SG_CNT); 2623e399441dSJames Smart 2624e399441dSJames Smart freq->sg_cnt = 0; 2625e399441dSJames Smart } 2626e399441dSJames Smart 2627e399441dSJames Smart /* 2628e399441dSJames Smart * In FC, the queue is a logical thing. At transport connect, the target 2629e399441dSJames Smart * creates its "queue" and returns a handle that is to be given to the 2630e399441dSJames Smart * target whenever it posts something to the corresponding SQ. When an 2631e399441dSJames Smart * SQE is sent on a SQ, FC effectively considers the SQE, or rather the 2632e399441dSJames Smart * command contained within the SQE, an io, and assigns a FC exchange 2633e399441dSJames Smart * to it. The SQE and the associated SQ handle are sent in the initial 2634e399441dSJames Smart * CMD IU sents on the exchange. All transfers relative to the io occur 2635e399441dSJames Smart * as part of the exchange. The CQE is the last thing for the io, 2636e399441dSJames Smart * which is transferred (explicitly or implicitly) with the RSP IU 2637e399441dSJames Smart * sent on the exchange. After the CQE is received, the FC exchange is 2638e399441dSJames Smart * terminaed and the Exchange may be used on a different io. 2639e399441dSJames Smart * 2640e399441dSJames Smart * The transport to LLDD api has the transport making a request for a 2641e399441dSJames Smart * new fcp io request to the LLDD. The LLDD then allocates a FC exchange 2642e399441dSJames Smart * resource and transfers the command. The LLDD will then process all 2643e399441dSJames Smart * steps to complete the io. Upon completion, the transport done routine 2644e399441dSJames Smart * is called. 2645e399441dSJames Smart * 2646e399441dSJames Smart * So - while the operation is outstanding to the LLDD, there is a link 2647e399441dSJames Smart * level FC exchange resource that is also outstanding. This must be 2648e399441dSJames Smart * considered in all cleanup operations. 2649e399441dSJames Smart */ 2650fc17b653SChristoph Hellwig static blk_status_t 2651e399441dSJames Smart nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, 2652e399441dSJames Smart struct nvme_fc_fcp_op *op, u32 data_len, 2653e399441dSJames Smart enum nvmefc_fcp_datadir io_dir) 2654e399441dSJames Smart { 2655e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 2656e399441dSJames Smart struct nvme_command *sqe = &cmdiu->sqe; 2657b12740d3SJames Smart int ret, opstate; 2658e399441dSJames Smart 265961bff8efSJames Smart /* 266061bff8efSJames Smart * before attempting to send the io, check to see if we believe 266161bff8efSJames Smart * the target device is present 266261bff8efSJames Smart */ 266361bff8efSJames Smart if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 266486ff7c2aSMing Lei return BLK_STS_RESOURCE; 266561bff8efSJames Smart 2666e399441dSJames Smart if (!nvme_fc_ctrl_get(ctrl)) 2667fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2668e399441dSJames Smart 2669e399441dSJames Smart /* format the FC-NVME CMD IU and fcp_req */ 2670e399441dSJames Smart cmdiu->connection_id = cpu_to_be64(queue->connection_id); 2671e399441dSJames Smart cmdiu->data_len = cpu_to_be32(data_len); 2672e399441dSJames Smart switch (io_dir) { 2673e399441dSJames Smart case NVMEFC_FCP_WRITE: 2674e399441dSJames Smart cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; 2675e399441dSJames Smart break; 2676e399441dSJames Smart case NVMEFC_FCP_READ: 2677e399441dSJames Smart cmdiu->flags = FCNVME_CMD_FLAGS_READ; 2678e399441dSJames Smart break; 2679e399441dSJames Smart case NVMEFC_FCP_NODATA: 2680e399441dSJames Smart cmdiu->flags = 0; 2681e399441dSJames Smart break; 2682e399441dSJames Smart } 2683e399441dSJames Smart op->fcp_req.payload_length = data_len; 2684e399441dSJames Smart op->fcp_req.io_dir = io_dir; 2685e399441dSJames Smart op->fcp_req.transferred_length = 0; 2686e399441dSJames Smart op->fcp_req.rcv_rsplen = 0; 268762eeacb0SJames Smart op->fcp_req.status = NVME_SC_SUCCESS; 2688e399441dSJames Smart op->fcp_req.sqid = cpu_to_le16(queue->qnum); 2689e399441dSJames Smart 2690e399441dSJames Smart /* 2691e399441dSJames Smart * validate per fabric rules, set fields mandated by fabric spec 2692e399441dSJames Smart * as well as those by FC-NVME spec. 2693e399441dSJames Smart */ 2694e399441dSJames Smart WARN_ON_ONCE(sqe->common.metadata); 2695e399441dSJames Smart sqe->common.flags |= NVME_CMD_SGL_METABUF; 2696e399441dSJames Smart 2697e399441dSJames Smart /* 2698d9d34c0bSJames Smart * format SQE DPTR field per FC-NVME rules: 2699d9d34c0bSJames Smart * type=0x5 Transport SGL Data Block Descriptor 2700d9d34c0bSJames Smart * subtype=0xA Transport-specific value 2701d9d34c0bSJames Smart * address=0 2702d9d34c0bSJames Smart * length=length of the data series 2703e399441dSJames Smart */ 2704d9d34c0bSJames Smart sqe->rw.dptr.sgl.type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 2705d9d34c0bSJames Smart NVME_SGL_FMT_TRANSPORT_A; 2706e399441dSJames Smart sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); 2707e399441dSJames Smart sqe->rw.dptr.sgl.addr = 0; 2708e399441dSJames Smart 270978a7ac26SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) { 2710e399441dSJames Smart ret = nvme_fc_map_data(ctrl, op->rq, op); 2711e399441dSJames Smart if (ret < 0) { 2712e399441dSJames Smart nvme_cleanup_cmd(op->rq); 2713e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2714fc17b653SChristoph Hellwig if (ret == -ENOMEM || ret == -EAGAIN) 2715fc17b653SChristoph Hellwig return BLK_STS_RESOURCE; 2716fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2717e399441dSJames Smart } 2718e399441dSJames Smart } 2719e399441dSJames Smart 2720e399441dSJames Smart fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, 2721e399441dSJames Smart sizeof(op->cmd_iu), DMA_TO_DEVICE); 2722e399441dSJames Smart 2723e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_ACTIVE); 2724e399441dSJames Smart 272578a7ac26SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) 2726e399441dSJames Smart blk_mq_start_request(op->rq); 2727e399441dSJames Smart 272867f471b6SJames Smart cmdiu->csn = cpu_to_be32(atomic_inc_return(&queue->csn)); 2729e399441dSJames Smart ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, 2730e399441dSJames Smart &ctrl->rport->remoteport, 2731e399441dSJames Smart queue->lldd_handle, &op->fcp_req); 2732e399441dSJames Smart 2733e399441dSJames Smart if (ret) { 273467f471b6SJames Smart /* 273567f471b6SJames Smart * If the lld fails to send the command is there an issue with 273667f471b6SJames Smart * the csn value? If the command that fails is the Connect, 273767f471b6SJames Smart * no - as the connection won't be live. If it is a command 273867f471b6SJames Smart * post-connect, it's possible a gap in csn may be created. 273967f471b6SJames Smart * Does this matter? As Linux initiators don't send fused 274067f471b6SJames Smart * commands, no. The gap would exist, but as there's nothing 274167f471b6SJames Smart * that depends on csn order to be delivered on the target 274267f471b6SJames Smart * side, it shouldn't hurt. It would be difficult for a 274367f471b6SJames Smart * target to even detect the csn gap as it has no idea when the 274467f471b6SJames Smart * cmd with the csn was supposed to arrive. 274567f471b6SJames Smart */ 2746b12740d3SJames Smart opstate = atomic_xchg(&op->state, FCPOP_STATE_COMPLETE); 2747b12740d3SJames Smart __nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate); 2748b12740d3SJames Smart 2749c9c12e51SDaniel Wagner if (!(op->flags & FCOP_FLAGS_AEN)) { 2750e399441dSJames Smart nvme_fc_unmap_data(ctrl, op->rq, op); 275116686f3aSMax Gurtovoy nvme_cleanup_cmd(op->rq); 2752c9c12e51SDaniel Wagner } 2753c9c12e51SDaniel Wagner 2754e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2755e399441dSJames Smart 27568b25f351SJames Smart if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE && 27578b25f351SJames Smart ret != -EBUSY) 2758fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2759e399441dSJames Smart 276086ff7c2aSMing Lei return BLK_STS_RESOURCE; 2761e399441dSJames Smart } 2762e399441dSJames Smart 2763fc17b653SChristoph Hellwig return BLK_STS_OK; 2764e399441dSJames Smart } 2765e399441dSJames Smart 2766fc17b653SChristoph Hellwig static blk_status_t 2767e399441dSJames Smart nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, 2768e399441dSJames Smart const struct blk_mq_queue_data *bd) 2769e399441dSJames Smart { 2770e399441dSJames Smart struct nvme_ns *ns = hctx->queue->queuedata; 2771e399441dSJames Smart struct nvme_fc_queue *queue = hctx->driver_data; 2772e399441dSJames Smart struct nvme_fc_ctrl *ctrl = queue->ctrl; 2773e399441dSJames Smart struct request *rq = bd->rq; 2774e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2775e399441dSJames Smart enum nvmefc_fcp_datadir io_dir; 27763bc32bb1SChristoph Hellwig bool queue_ready = test_bit(NVME_FC_Q_LIVE, &queue->flags); 2777e399441dSJames Smart u32 data_len; 2778fc17b653SChristoph Hellwig blk_status_t ret; 2779e399441dSJames Smart 27803bc32bb1SChristoph Hellwig if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE || 2781a9715744STao Chiu !nvme_check_ready(&queue->ctrl->ctrl, rq, queue_ready)) 2782a9715744STao Chiu return nvme_fail_nonready_command(&queue->ctrl->ctrl, rq); 27839e0ed16aSSagi Grimberg 2784f4b9e6c9SKeith Busch ret = nvme_setup_cmd(ns, rq); 2785e399441dSJames Smart if (ret) 2786e399441dSJames Smart return ret; 2787e399441dSJames Smart 27889f7d8ae2SJames Smart /* 27899f7d8ae2SJames Smart * nvme core doesn't quite treat the rq opaquely. Commands such 27909f7d8ae2SJames Smart * as WRITE ZEROES will return a non-zero rq payload_bytes yet 27919f7d8ae2SJames Smart * there is no actual payload to be transferred. 27929f7d8ae2SJames Smart * To get it right, key data transmission on there being 1 or 27939f7d8ae2SJames Smart * more physical segments in the sg list. If there is no 27949f7d8ae2SJames Smart * physical segments, there is no payload. 27959f7d8ae2SJames Smart */ 27969f7d8ae2SJames Smart if (blk_rq_nr_phys_segments(rq)) { 2797b131c61dSChristoph Hellwig data_len = blk_rq_payload_bytes(rq); 2798e399441dSJames Smart io_dir = ((rq_data_dir(rq) == WRITE) ? 2799e399441dSJames Smart NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); 28009f7d8ae2SJames Smart } else { 28019f7d8ae2SJames Smart data_len = 0; 2802e399441dSJames Smart io_dir = NVMEFC_FCP_NODATA; 28039f7d8ae2SJames Smart } 28049f7d8ae2SJames Smart 2805e399441dSJames Smart 2806e399441dSJames Smart return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); 2807e399441dSJames Smart } 2808e399441dSJames Smart 2809e399441dSJames Smart static void 2810ad22c355SKeith Busch nvme_fc_submit_async_event(struct nvme_ctrl *arg) 2811e399441dSJames Smart { 2812e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); 2813e399441dSJames Smart struct nvme_fc_fcp_op *aen_op; 2814fc17b653SChristoph Hellwig blk_status_t ret; 2815e399441dSJames Smart 2816eb4ee8f1SJames Smart if (test_bit(FCCTRL_TERMIO, &ctrl->flags)) 281761bff8efSJames Smart return; 281861bff8efSJames Smart 2819ad22c355SKeith Busch aen_op = &ctrl->aen_ops[0]; 2820e399441dSJames Smart 2821e399441dSJames Smart ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, 2822e399441dSJames Smart NVMEFC_FCP_NODATA); 2823e399441dSJames Smart if (ret) 2824e399441dSJames Smart dev_err(ctrl->ctrl.device, 2825ad22c355SKeith Busch "failed async event work\n"); 2826e399441dSJames Smart } 2827e399441dSJames Smart 2828e399441dSJames Smart static void 2829c3aedd22SJames Smart nvme_fc_complete_rq(struct request *rq) 2830e399441dSJames Smart { 2831e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2832e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 2833e399441dSJames Smart 283478a7ac26SJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 283552793d62SJames Smart op->flags &= ~FCOP_FLAGS_TERMIO; 2836e399441dSJames Smart 2837e399441dSJames Smart nvme_fc_unmap_data(ctrl, rq, op); 283877f02a7aSChristoph Hellwig nvme_complete_rq(rq); 2839e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 284078a7ac26SJames Smart } 284178a7ac26SJames Smart 2842e399441dSJames Smart 284361bff8efSJames Smart static const struct blk_mq_ops nvme_fc_mq_ops = { 284461bff8efSJames Smart .queue_rq = nvme_fc_queue_rq, 284561bff8efSJames Smart .complete = nvme_fc_complete_rq, 284661bff8efSJames Smart .init_request = nvme_fc_init_request, 284761bff8efSJames Smart .exit_request = nvme_fc_exit_request, 284861bff8efSJames Smart .init_hctx = nvme_fc_init_hctx, 284961bff8efSJames Smart .timeout = nvme_fc_timeout, 2850e399441dSJames Smart }; 2851e399441dSJames Smart 2852e399441dSJames Smart static int 2853e399441dSJames Smart nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) 2854e399441dSJames Smart { 2855e399441dSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 28567314183dSSagi Grimberg unsigned int nr_io_queues; 2857e399441dSJames Smart int ret; 2858e399441dSJames Smart 28597314183dSSagi Grimberg nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), 28607314183dSSagi Grimberg ctrl->lport->ops->max_hw_queues); 28617314183dSSagi Grimberg ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); 2862e399441dSJames Smart if (ret) { 2863e399441dSJames Smart dev_info(ctrl->ctrl.device, 2864e399441dSJames Smart "set_queue_count failed: %d\n", ret); 2865e399441dSJames Smart return ret; 2866e399441dSJames Smart } 2867e399441dSJames Smart 28687314183dSSagi Grimberg ctrl->ctrl.queue_count = nr_io_queues + 1; 28697314183dSSagi Grimberg if (!nr_io_queues) 2870e399441dSJames Smart return 0; 2871e399441dSJames Smart 2872e399441dSJames Smart nvme_fc_init_io_queues(ctrl); 2873e399441dSJames Smart 2874e399441dSJames Smart memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); 2875e399441dSJames Smart ctrl->tag_set.ops = &nvme_fc_mq_ops; 2876e399441dSJames Smart ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; 2877ed01fee2SChristoph Hellwig ctrl->tag_set.reserved_tags = NVMF_RESERVED_TAGS; 2878103e515eSHannes Reinecke ctrl->tag_set.numa_node = ctrl->ctrl.numa_node; 2879e399441dSJames Smart ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; 2880d3d0bc78SBart Van Assche ctrl->tag_set.cmd_size = 2881d3d0bc78SBart Van Assche struct_size((struct nvme_fcp_op_w_sgl *)NULL, priv, 2882d3d0bc78SBart Van Assche ctrl->lport->ops->fcprqst_priv_sz); 2883e399441dSJames Smart ctrl->tag_set.driver_data = ctrl; 2884d858e5f0SSagi Grimberg ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1; 2885e399441dSJames Smart ctrl->tag_set.timeout = NVME_IO_TIMEOUT; 2886e399441dSJames Smart 2887e399441dSJames Smart ret = blk_mq_alloc_tag_set(&ctrl->tag_set); 2888e399441dSJames Smart if (ret) 2889e399441dSJames Smart return ret; 2890e399441dSJames Smart 2891e399441dSJames Smart ctrl->ctrl.tagset = &ctrl->tag_set; 2892e399441dSJames Smart 2893e399441dSJames Smart ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); 2894e399441dSJames Smart if (IS_ERR(ctrl->ctrl.connect_q)) { 2895e399441dSJames Smart ret = PTR_ERR(ctrl->ctrl.connect_q); 2896e399441dSJames Smart goto out_free_tag_set; 2897e399441dSJames Smart } 2898e399441dSJames Smart 2899d157e534SJames Smart ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1); 2900e399441dSJames Smart if (ret) 2901e399441dSJames Smart goto out_cleanup_blk_queue; 2902e399441dSJames Smart 2903d157e534SJames Smart ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.sqsize + 1); 2904e399441dSJames Smart if (ret) 2905e399441dSJames Smart goto out_delete_hw_queues; 2906e399441dSJames Smart 29074c984154SJames Smart ctrl->ioq_live = true; 29084c984154SJames Smart 2909e399441dSJames Smart return 0; 2910e399441dSJames Smart 2911e399441dSJames Smart out_delete_hw_queues: 2912e399441dSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 2913e399441dSJames Smart out_cleanup_blk_queue: 2914e399441dSJames Smart blk_cleanup_queue(ctrl->ctrl.connect_q); 2915e399441dSJames Smart out_free_tag_set: 2916e399441dSJames Smart blk_mq_free_tag_set(&ctrl->tag_set); 2917e399441dSJames Smart nvme_fc_free_io_queues(ctrl); 2918e399441dSJames Smart 2919e399441dSJames Smart /* force put free routine to ignore io queues */ 2920e399441dSJames Smart ctrl->ctrl.tagset = NULL; 2921e399441dSJames Smart 2922e399441dSJames Smart return ret; 2923e399441dSJames Smart } 2924e399441dSJames Smart 292561bff8efSJames Smart static int 29263e493c00SJames Smart nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl) 292761bff8efSJames Smart { 292861bff8efSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 2929834d3710SJames Smart u32 prior_ioq_cnt = ctrl->ctrl.queue_count - 1; 29307314183dSSagi Grimberg unsigned int nr_io_queues; 293161bff8efSJames Smart int ret; 293261bff8efSJames Smart 29337314183dSSagi Grimberg nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), 29347314183dSSagi Grimberg ctrl->lport->ops->max_hw_queues); 29357314183dSSagi Grimberg ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); 293661bff8efSJames Smart if (ret) { 293761bff8efSJames Smart dev_info(ctrl->ctrl.device, 293861bff8efSJames Smart "set_queue_count failed: %d\n", ret); 293961bff8efSJames Smart return ret; 294061bff8efSJames Smart } 294161bff8efSJames Smart 2942834d3710SJames Smart if (!nr_io_queues && prior_ioq_cnt) { 2943834d3710SJames Smart dev_info(ctrl->ctrl.device, 2944834d3710SJames Smart "Fail Reconnect: At least 1 io queue " 2945834d3710SJames Smart "required (was %d)\n", prior_ioq_cnt); 2946834d3710SJames Smart return -ENOSPC; 2947834d3710SJames Smart } 2948834d3710SJames Smart 29497314183dSSagi Grimberg ctrl->ctrl.queue_count = nr_io_queues + 1; 295061bff8efSJames Smart /* check for io queues existing */ 2951d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count == 1) 295261bff8efSJames Smart return 0; 295361bff8efSJames Smart 2954d157e534SJames Smart ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1); 295561bff8efSJames Smart if (ret) 295661bff8efSJames Smart goto out_free_io_queues; 295761bff8efSJames Smart 2958d157e534SJames Smart ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.sqsize + 1); 295961bff8efSJames Smart if (ret) 296061bff8efSJames Smart goto out_delete_hw_queues; 296161bff8efSJames Smart 296288e837edSJames Smart if (prior_ioq_cnt != nr_io_queues) { 2963834d3710SJames Smart dev_info(ctrl->ctrl.device, 2964834d3710SJames Smart "reconnect: revising io queue count from %d to %d\n", 2965834d3710SJames Smart prior_ioq_cnt, nr_io_queues); 296688e837edSJames Smart nvme_wait_freeze(&ctrl->ctrl); 2967cda5fd1aSSagi Grimberg blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); 296888e837edSJames Smart nvme_unfreeze(&ctrl->ctrl); 296988e837edSJames Smart } 2970cda5fd1aSSagi Grimberg 297161bff8efSJames Smart return 0; 297261bff8efSJames Smart 297361bff8efSJames Smart out_delete_hw_queues: 297461bff8efSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 297561bff8efSJames Smart out_free_io_queues: 297661bff8efSJames Smart nvme_fc_free_io_queues(ctrl); 297761bff8efSJames Smart return ret; 297861bff8efSJames Smart } 297961bff8efSJames Smart 2980158bfb88SJames Smart static void 2981158bfb88SJames Smart nvme_fc_rport_active_on_lport(struct nvme_fc_rport *rport) 2982158bfb88SJames Smart { 2983158bfb88SJames Smart struct nvme_fc_lport *lport = rport->lport; 2984158bfb88SJames Smart 2985158bfb88SJames Smart atomic_inc(&lport->act_rport_cnt); 2986158bfb88SJames Smart } 2987158bfb88SJames Smart 2988158bfb88SJames Smart static void 2989158bfb88SJames Smart nvme_fc_rport_inactive_on_lport(struct nvme_fc_rport *rport) 2990158bfb88SJames Smart { 2991158bfb88SJames Smart struct nvme_fc_lport *lport = rport->lport; 2992158bfb88SJames Smart u32 cnt; 2993158bfb88SJames Smart 2994158bfb88SJames Smart cnt = atomic_dec_return(&lport->act_rport_cnt); 2995158bfb88SJames Smart if (cnt == 0 && lport->localport.port_state == FC_OBJSTATE_DELETED) 2996158bfb88SJames Smart lport->ops->localport_delete(&lport->localport); 2997158bfb88SJames Smart } 2998158bfb88SJames Smart 2999158bfb88SJames Smart static int 3000158bfb88SJames Smart nvme_fc_ctlr_active_on_rport(struct nvme_fc_ctrl *ctrl) 3001158bfb88SJames Smart { 3002158bfb88SJames Smart struct nvme_fc_rport *rport = ctrl->rport; 3003158bfb88SJames Smart u32 cnt; 3004158bfb88SJames Smart 3005eb4ee8f1SJames Smart if (test_and_set_bit(ASSOC_ACTIVE, &ctrl->flags)) 3006158bfb88SJames Smart return 1; 3007158bfb88SJames Smart 3008158bfb88SJames Smart cnt = atomic_inc_return(&rport->act_ctrl_cnt); 3009158bfb88SJames Smart if (cnt == 1) 3010158bfb88SJames Smart nvme_fc_rport_active_on_lport(rport); 3011158bfb88SJames Smart 3012158bfb88SJames Smart return 0; 3013158bfb88SJames Smart } 3014158bfb88SJames Smart 3015158bfb88SJames Smart static int 3016158bfb88SJames Smart nvme_fc_ctlr_inactive_on_rport(struct nvme_fc_ctrl *ctrl) 3017158bfb88SJames Smart { 3018158bfb88SJames Smart struct nvme_fc_rport *rport = ctrl->rport; 3019158bfb88SJames Smart struct nvme_fc_lport *lport = rport->lport; 3020158bfb88SJames Smart u32 cnt; 3021158bfb88SJames Smart 3022eb4ee8f1SJames Smart /* clearing of ctrl->flags ASSOC_ACTIVE bit is in association delete */ 3023158bfb88SJames Smart 3024158bfb88SJames Smart cnt = atomic_dec_return(&rport->act_ctrl_cnt); 3025158bfb88SJames Smart if (cnt == 0) { 3026158bfb88SJames Smart if (rport->remoteport.port_state == FC_OBJSTATE_DELETED) 3027158bfb88SJames Smart lport->ops->remoteport_delete(&rport->remoteport); 3028158bfb88SJames Smart nvme_fc_rport_inactive_on_lport(rport); 3029158bfb88SJames Smart } 3030158bfb88SJames Smart 3031158bfb88SJames Smart return 0; 3032158bfb88SJames Smart } 3033158bfb88SJames Smart 303461bff8efSJames Smart /* 303561bff8efSJames Smart * This routine restarts the controller on the host side, and 303661bff8efSJames Smart * on the link side, recreates the controller association. 303761bff8efSJames Smart */ 303861bff8efSJames Smart static int 303961bff8efSJames Smart nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) 304061bff8efSJames Smart { 304161bff8efSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 304214fd1e98SJames Smart struct nvmefc_ls_rcv_op *disls = NULL; 304314fd1e98SJames Smart unsigned long flags; 304461bff8efSJames Smart int ret; 304561bff8efSJames Smart bool changed; 304661bff8efSJames Smart 3047fdf9dfa8SSagi Grimberg ++ctrl->ctrl.nr_reconnects; 304861bff8efSJames Smart 304996e24801SJames Smart if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 305096e24801SJames Smart return -ENODEV; 305196e24801SJames Smart 3052158bfb88SJames Smart if (nvme_fc_ctlr_active_on_rport(ctrl)) 3053158bfb88SJames Smart return -ENOTUNIQ; 3054158bfb88SJames Smart 30554bea364fSJames Smart dev_info(ctrl->ctrl.device, 30564bea364fSJames Smart "NVME-FC{%d}: create association : host wwpn 0x%016llx " 30574bea364fSJames Smart " rport wwpn 0x%016llx: NQN \"%s\"\n", 30584bea364fSJames Smart ctrl->cnum, ctrl->lport->localport.port_name, 30594bea364fSJames Smart ctrl->rport->remoteport.port_name, ctrl->ctrl.opts->subsysnqn); 30604bea364fSJames Smart 3061caf1cbe3SJames Smart clear_bit(ASSOC_FAILED, &ctrl->flags); 3062caf1cbe3SJames Smart 306361bff8efSJames Smart /* 306461bff8efSJames Smart * Create the admin queue 306561bff8efSJames Smart */ 306661bff8efSJames Smart 306761bff8efSJames Smart ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, 3068d157e534SJames Smart NVME_AQ_DEPTH); 306961bff8efSJames Smart if (ret) 307061bff8efSJames Smart goto out_free_queue; 307161bff8efSJames Smart 307261bff8efSJames Smart ret = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], 3073d157e534SJames Smart NVME_AQ_DEPTH, (NVME_AQ_DEPTH / 4)); 307461bff8efSJames Smart if (ret) 307561bff8efSJames Smart goto out_delete_hw_queue; 307661bff8efSJames Smart 307761bff8efSJames Smart ret = nvmf_connect_admin_queue(&ctrl->ctrl); 307861bff8efSJames Smart if (ret) 307961bff8efSJames Smart goto out_disconnect_admin_queue; 308061bff8efSJames Smart 30819e0ed16aSSagi Grimberg set_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags); 30829e0ed16aSSagi Grimberg 308361bff8efSJames Smart /* 308461bff8efSJames Smart * Check controller capabilities 308561bff8efSJames Smart * 308661bff8efSJames Smart * todo:- add code to check if ctrl attributes changed from 308761bff8efSJames Smart * prior connection values 308861bff8efSJames Smart */ 308961bff8efSJames Smart 3090c0f2f45bSSagi Grimberg ret = nvme_enable_ctrl(&ctrl->ctrl); 3091caf1cbe3SJames Smart if (ret || test_bit(ASSOC_FAILED, &ctrl->flags)) 309261bff8efSJames Smart goto out_disconnect_admin_queue; 309361bff8efSJames Smart 309423748076SJames Smart ctrl->ctrl.max_segments = ctrl->lport->ops->max_sgl_segments; 309523748076SJames Smart ctrl->ctrl.max_hw_sectors = ctrl->ctrl.max_segments << 309623748076SJames Smart (ilog2(SZ_4K) - 9); 309761bff8efSJames Smart 3098e7832cb4SSagi Grimberg blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 3099e7832cb4SSagi Grimberg 3100f21c4769SChaitanya Kulkarni ret = nvme_init_ctrl_finish(&ctrl->ctrl); 3101caf1cbe3SJames Smart if (ret || test_bit(ASSOC_FAILED, &ctrl->flags)) 310261bff8efSJames Smart goto out_disconnect_admin_queue; 310361bff8efSJames Smart 310461bff8efSJames Smart /* sanity checks */ 310561bff8efSJames Smart 310661bff8efSJames Smart /* FC-NVME does not have other data in the capsule */ 310761bff8efSJames Smart if (ctrl->ctrl.icdoff) { 310861bff8efSJames Smart dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", 310961bff8efSJames Smart ctrl->ctrl.icdoff); 3110f25f8ef7SHannes Reinecke ret = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 311161bff8efSJames Smart goto out_disconnect_admin_queue; 311261bff8efSJames Smart } 311361bff8efSJames Smart 311461bff8efSJames Smart /* FC-NVME supports normal SGL Data Block Descriptors */ 3115b61678bcSChaitanya Kulkarni if (!nvme_ctrl_sgl_supported(&ctrl->ctrl)) { 31168df1bff5SMax Gurtovoy dev_err(ctrl->ctrl.device, 31178df1bff5SMax Gurtovoy "Mandatory sgls are not supported!\n"); 3118f25f8ef7SHannes Reinecke ret = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 31198df1bff5SMax Gurtovoy goto out_disconnect_admin_queue; 31208df1bff5SMax Gurtovoy } 312161bff8efSJames Smart 312261bff8efSJames Smart if (opts->queue_size > ctrl->ctrl.maxcmd) { 312361bff8efSJames Smart /* warn if maxcmd is lower than queue_size */ 312461bff8efSJames Smart dev_warn(ctrl->ctrl.device, 312561bff8efSJames Smart "queue_size %zu > ctrl maxcmd %u, reducing " 31267db39484SJames Smart "to maxcmd\n", 312761bff8efSJames Smart opts->queue_size, ctrl->ctrl.maxcmd); 312861bff8efSJames Smart opts->queue_size = ctrl->ctrl.maxcmd; 312961bff8efSJames Smart } 313061bff8efSJames Smart 3131d157e534SJames Smart if (opts->queue_size > ctrl->ctrl.sqsize + 1) { 3132d157e534SJames Smart /* warn if sqsize is lower than queue_size */ 3133d157e534SJames Smart dev_warn(ctrl->ctrl.device, 31347db39484SJames Smart "queue_size %zu > ctrl sqsize %u, reducing " 31357db39484SJames Smart "to sqsize\n", 3136d157e534SJames Smart opts->queue_size, ctrl->ctrl.sqsize + 1); 3137d157e534SJames Smart opts->queue_size = ctrl->ctrl.sqsize + 1; 3138d157e534SJames Smart } 3139d157e534SJames Smart 314061bff8efSJames Smart ret = nvme_fc_init_aen_ops(ctrl); 314161bff8efSJames Smart if (ret) 314261bff8efSJames Smart goto out_term_aen_ops; 314361bff8efSJames Smart 314461bff8efSJames Smart /* 314561bff8efSJames Smart * Create the io queues 314661bff8efSJames Smart */ 314761bff8efSJames Smart 3148d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count > 1) { 31494c984154SJames Smart if (!ctrl->ioq_live) 315061bff8efSJames Smart ret = nvme_fc_create_io_queues(ctrl); 315161bff8efSJames Smart else 31523e493c00SJames Smart ret = nvme_fc_recreate_io_queues(ctrl); 315361bff8efSJames Smart } 3154caf1cbe3SJames Smart if (ret || test_bit(ASSOC_FAILED, &ctrl->flags)) 3155caf1cbe3SJames Smart goto out_term_aen_ops; 315661bff8efSJames Smart 315761bff8efSJames Smart changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); 315861bff8efSJames Smart 3159fdf9dfa8SSagi Grimberg ctrl->ctrl.nr_reconnects = 0; 316061bff8efSJames Smart 316144c6ec77SJames Smart if (changed) 3162d09f2b45SSagi Grimberg nvme_start_ctrl(&ctrl->ctrl); 316361bff8efSJames Smart 316461bff8efSJames Smart return 0; /* Success */ 316561bff8efSJames Smart 316661bff8efSJames Smart out_term_aen_ops: 316761bff8efSJames Smart nvme_fc_term_aen_ops(ctrl); 316861bff8efSJames Smart out_disconnect_admin_queue: 316961bff8efSJames Smart /* send a Disconnect(association) LS to fc-nvme target */ 317061bff8efSJames Smart nvme_fc_xmt_disconnect_assoc(ctrl); 317114fd1e98SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 3172bcde5f0fSJames Smart ctrl->association_id = 0; 317314fd1e98SJames Smart disls = ctrl->rcv_disconn; 317414fd1e98SJames Smart ctrl->rcv_disconn = NULL; 317514fd1e98SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 317614fd1e98SJames Smart if (disls) 317714fd1e98SJames Smart nvme_fc_xmt_ls_rsp(disls); 317861bff8efSJames Smart out_delete_hw_queue: 317961bff8efSJames Smart __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); 318061bff8efSJames Smart out_free_queue: 318161bff8efSJames Smart nvme_fc_free_queue(&ctrl->queues[0]); 3182eb4ee8f1SJames Smart clear_bit(ASSOC_ACTIVE, &ctrl->flags); 3183158bfb88SJames Smart nvme_fc_ctlr_inactive_on_rport(ctrl); 318461bff8efSJames Smart 318561bff8efSJames Smart return ret; 318661bff8efSJames Smart } 318761bff8efSJames Smart 318852793d62SJames Smart 318952793d62SJames Smart /* 319061bff8efSJames Smart * This routine stops operation of the controller on the host side. 319161bff8efSJames Smart * On the host os stack side: Admin and IO queues are stopped, 319261bff8efSJames Smart * outstanding ios on them terminated via FC ABTS. 319361bff8efSJames Smart * On the link side: the association is terminated. 319461bff8efSJames Smart */ 319561bff8efSJames Smart static void 319661bff8efSJames Smart nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl) 319761bff8efSJames Smart { 319814fd1e98SJames Smart struct nvmefc_ls_rcv_op *disls = NULL; 319961bff8efSJames Smart unsigned long flags; 320061bff8efSJames Smart 3201eb4ee8f1SJames Smart if (!test_and_clear_bit(ASSOC_ACTIVE, &ctrl->flags)) 3202158bfb88SJames Smart return; 3203158bfb88SJames Smart 320461bff8efSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 3205eb4ee8f1SJames Smart set_bit(FCCTRL_TERMIO, &ctrl->flags); 320661bff8efSJames Smart ctrl->iocnt = 0; 320761bff8efSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 320861bff8efSJames Smart 320952793d62SJames Smart __nvme_fc_abort_outstanding_ios(ctrl, false); 321061bff8efSJames Smart 321161bff8efSJames Smart /* kill the aens as they are a separate path */ 321261bff8efSJames Smart nvme_fc_abort_aen_ops(ctrl); 321361bff8efSJames Smart 321461bff8efSJames Smart /* wait for all io that had to be aborted */ 32158a82dbf1SJames Smart spin_lock_irq(&ctrl->lock); 321636715cf4SJames Smart wait_event_lock_irq(ctrl->ioabort_wait, ctrl->iocnt == 0, ctrl->lock); 3217eb4ee8f1SJames Smart clear_bit(FCCTRL_TERMIO, &ctrl->flags); 32188a82dbf1SJames Smart spin_unlock_irq(&ctrl->lock); 321961bff8efSJames Smart 322061bff8efSJames Smart nvme_fc_term_aen_ops(ctrl); 322161bff8efSJames Smart 322261bff8efSJames Smart /* 322361bff8efSJames Smart * send a Disconnect(association) LS to fc-nvme target 322461bff8efSJames Smart * Note: could have been sent at top of process, but 322561bff8efSJames Smart * cleaner on link traffic if after the aborts complete. 322661bff8efSJames Smart * Note: if association doesn't exist, association_id will be 0 322761bff8efSJames Smart */ 322861bff8efSJames Smart if (ctrl->association_id) 322961bff8efSJames Smart nvme_fc_xmt_disconnect_assoc(ctrl); 323061bff8efSJames Smart 323114fd1e98SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 3232bcde5f0fSJames Smart ctrl->association_id = 0; 323314fd1e98SJames Smart disls = ctrl->rcv_disconn; 323414fd1e98SJames Smart ctrl->rcv_disconn = NULL; 323514fd1e98SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 323614fd1e98SJames Smart if (disls) 323714fd1e98SJames Smart /* 323814fd1e98SJames Smart * if a Disconnect Request was waiting for a response, send 323914fd1e98SJames Smart * now that all ABTS's have been issued (and are complete). 324014fd1e98SJames Smart */ 324114fd1e98SJames Smart nvme_fc_xmt_ls_rsp(disls); 3242bcde5f0fSJames Smart 324361bff8efSJames Smart if (ctrl->ctrl.tagset) { 324461bff8efSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 324561bff8efSJames Smart nvme_fc_free_io_queues(ctrl); 324661bff8efSJames Smart } 324761bff8efSJames Smart 324861bff8efSJames Smart __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); 324961bff8efSJames Smart nvme_fc_free_queue(&ctrl->queues[0]); 3250158bfb88SJames Smart 3251d625d05eSJames Smart /* re-enable the admin_q so anything new can fast fail */ 3252d625d05eSJames Smart blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 3253d625d05eSJames Smart 325402d62a8bSJames Smart /* resume the io queues so that things will fast fail */ 325502d62a8bSJames Smart nvme_start_queues(&ctrl->ctrl); 325602d62a8bSJames Smart 3257158bfb88SJames Smart nvme_fc_ctlr_inactive_on_rport(ctrl); 325861bff8efSJames Smart } 325961bff8efSJames Smart 326061bff8efSJames Smart static void 3261c5017e85SChristoph Hellwig nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl) 326261bff8efSJames Smart { 3263c5017e85SChristoph Hellwig struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 326461bff8efSJames Smart 326519fce047SJames Smart cancel_work_sync(&ctrl->ioerr_work); 326661bff8efSJames Smart cancel_delayed_work_sync(&ctrl->connect_work); 326761bff8efSJames Smart /* 326861bff8efSJames Smart * kill the association on the link side. this will block 326961bff8efSJames Smart * waiting for io to terminate 327061bff8efSJames Smart */ 327161bff8efSJames Smart nvme_fc_delete_association(ctrl); 327261bff8efSJames Smart } 327361bff8efSJames Smart 327461bff8efSJames Smart static void 32755bbecdbcSJames Smart nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) 32765bbecdbcSJames Smart { 32772b632970SJames Smart struct nvme_fc_rport *rport = ctrl->rport; 32782b632970SJames Smart struct nvme_fc_remote_port *portptr = &rport->remoteport; 32792b632970SJames Smart unsigned long recon_delay = ctrl->ctrl.opts->reconnect_delay * HZ; 32802b632970SJames Smart bool recon = true; 32815bbecdbcSJames Smart 3282ad6a0a52SMax Gurtovoy if (ctrl->ctrl.state != NVME_CTRL_CONNECTING) 32835bbecdbcSJames Smart return; 32845bbecdbcSJames Smart 3285f25f8ef7SHannes Reinecke if (portptr->port_state == FC_OBJSTATE_ONLINE) { 3286589ff775SJames Smart dev_info(ctrl->ctrl.device, 32875bbecdbcSJames Smart "NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n", 32885bbecdbcSJames Smart ctrl->cnum, status); 3289f25f8ef7SHannes Reinecke if (status > 0 && (status & NVME_SC_DNR)) 3290f25f8ef7SHannes Reinecke recon = false; 3291f25f8ef7SHannes Reinecke } else if (time_after_eq(jiffies, rport->dev_loss_end)) 32922b632970SJames Smart recon = false; 32935bbecdbcSJames Smart 32942b632970SJames Smart if (recon && nvmf_should_reconnect(&ctrl->ctrl)) { 32952b632970SJames Smart if (portptr->port_state == FC_OBJSTATE_ONLINE) 32965bbecdbcSJames Smart dev_info(ctrl->ctrl.device, 32972b632970SJames Smart "NVME-FC{%d}: Reconnect attempt in %ld " 32982b632970SJames Smart "seconds\n", 32992b632970SJames Smart ctrl->cnum, recon_delay / HZ); 33002b632970SJames Smart else if (time_after(jiffies + recon_delay, rport->dev_loss_end)) 33012b632970SJames Smart recon_delay = rport->dev_loss_end - jiffies; 33022b632970SJames Smart 33032b632970SJames Smart queue_delayed_work(nvme_wq, &ctrl->connect_work, recon_delay); 33045bbecdbcSJames Smart } else { 3305f25f8ef7SHannes Reinecke if (portptr->port_state == FC_OBJSTATE_ONLINE) { 3306f25f8ef7SHannes Reinecke if (status > 0 && (status & NVME_SC_DNR)) 3307589ff775SJames Smart dev_warn(ctrl->ctrl.device, 3308f25f8ef7SHannes Reinecke "NVME-FC{%d}: reconnect failure\n", 3309f25f8ef7SHannes Reinecke ctrl->cnum); 33102b632970SJames Smart else 33112b632970SJames Smart dev_warn(ctrl->ctrl.device, 3312f25f8ef7SHannes Reinecke "NVME-FC{%d}: Max reconnect attempts " 3313f25f8ef7SHannes Reinecke "(%d) reached.\n", 3314f25f8ef7SHannes Reinecke ctrl->cnum, ctrl->ctrl.nr_reconnects); 3315f25f8ef7SHannes Reinecke } else 3316f25f8ef7SHannes Reinecke dev_warn(ctrl->ctrl.device, 33172b632970SJames Smart "NVME-FC{%d}: dev_loss_tmo (%d) expired " 331877d0612dSMax Gurtovoy "while waiting for remoteport connectivity.\n", 3319614fc1c0SMartin George ctrl->cnum, min_t(int, portptr->dev_loss_tmo, 3320614fc1c0SMartin George (ctrl->ctrl.opts->max_reconnects * 3321614fc1c0SMartin George ctrl->ctrl.opts->reconnect_delay))); 3322c5017e85SChristoph Hellwig WARN_ON(nvme_delete_ctrl(&ctrl->ctrl)); 33235bbecdbcSJames Smart } 33245bbecdbcSJames Smart } 33255bbecdbcSJames Smart 33265bbecdbcSJames Smart static void 332761bff8efSJames Smart nvme_fc_reset_ctrl_work(struct work_struct *work) 332861bff8efSJames Smart { 332961bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 3330d86c4d8eSChristoph Hellwig container_of(work, struct nvme_fc_ctrl, ctrl.reset_work); 33314cff280aSJames Smart 3332d09f2b45SSagi Grimberg nvme_stop_ctrl(&ctrl->ctrl); 333344c6ec77SJames Smart 3334ac9b820eSJames Smart /* will block will waiting for io to terminate */ 3335ac9b820eSJames Smart nvme_fc_delete_association(ctrl); 33362b632970SJames Smart 3337ac9b820eSJames Smart if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) 3338ac9b820eSJames Smart dev_err(ctrl->ctrl.device, 3339ac9b820eSJames Smart "NVME-FC{%d}: error_recovery: Couldn't change state " 3340ac9b820eSJames Smart "to CONNECTING\n", ctrl->cnum); 3341ac9b820eSJames Smart 3342ac9b820eSJames Smart if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE) { 3343ac9b820eSJames Smart if (!queue_delayed_work(nvme_wq, &ctrl->connect_work, 0)) { 3344ac9b820eSJames Smart dev_err(ctrl->ctrl.device, 3345ac9b820eSJames Smart "NVME-FC{%d}: failed to schedule connect " 3346ac9b820eSJames Smart "after reset\n", ctrl->cnum); 3347ac9b820eSJames Smart } else { 3348ac9b820eSJames Smart flush_delayed_work(&ctrl->connect_work); 3349ac9b820eSJames Smart } 3350ac9b820eSJames Smart } else { 3351ac9b820eSJames Smart nvme_fc_reconnect_or_delete(ctrl, -ENOTCONN); 3352ac9b820eSJames Smart } 335361bff8efSJames Smart } 335461bff8efSJames Smart 33554cff280aSJames Smart 335661bff8efSJames Smart static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { 335761bff8efSJames Smart .name = "fc", 335861bff8efSJames Smart .module = THIS_MODULE, 3359d3d5b87dSChristoph Hellwig .flags = NVME_F_FABRICS, 336061bff8efSJames Smart .reg_read32 = nvmf_reg_read32, 336161bff8efSJames Smart .reg_read64 = nvmf_reg_read64, 336261bff8efSJames Smart .reg_write32 = nvmf_reg_write32, 336361bff8efSJames Smart .free_ctrl = nvme_fc_nvme_ctrl_freed, 336461bff8efSJames Smart .submit_async_event = nvme_fc_submit_async_event, 3365c5017e85SChristoph Hellwig .delete_ctrl = nvme_fc_delete_ctrl, 336661bff8efSJames Smart .get_address = nvmf_get_address, 336761bff8efSJames Smart }; 336861bff8efSJames Smart 336961bff8efSJames Smart static void 337061bff8efSJames Smart nvme_fc_connect_ctrl_work(struct work_struct *work) 337161bff8efSJames Smart { 337261bff8efSJames Smart int ret; 337361bff8efSJames Smart 337461bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 337561bff8efSJames Smart container_of(to_delayed_work(work), 337661bff8efSJames Smart struct nvme_fc_ctrl, connect_work); 337761bff8efSJames Smart 337861bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 33795bbecdbcSJames Smart if (ret) 33805bbecdbcSJames Smart nvme_fc_reconnect_or_delete(ctrl, ret); 33815bbecdbcSJames Smart else 338261bff8efSJames Smart dev_info(ctrl->ctrl.device, 33834c984154SJames Smart "NVME-FC{%d}: controller connect complete\n", 338461bff8efSJames Smart ctrl->cnum); 338561bff8efSJames Smart } 338661bff8efSJames Smart 338761bff8efSJames Smart 338861bff8efSJames Smart static const struct blk_mq_ops nvme_fc_admin_mq_ops = { 338961bff8efSJames Smart .queue_rq = nvme_fc_queue_rq, 339061bff8efSJames Smart .complete = nvme_fc_complete_rq, 339176f983cbSChristoph Hellwig .init_request = nvme_fc_init_request, 339261bff8efSJames Smart .exit_request = nvme_fc_exit_request, 339361bff8efSJames Smart .init_hctx = nvme_fc_init_admin_hctx, 339461bff8efSJames Smart .timeout = nvme_fc_timeout, 339561bff8efSJames Smart }; 339661bff8efSJames Smart 3397e399441dSJames Smart 339856d5f4f1SJames Smart /* 339956d5f4f1SJames Smart * Fails a controller request if it matches an existing controller 340056d5f4f1SJames Smart * (association) with the same tuple: 340156d5f4f1SJames Smart * <Host NQN, Host ID, local FC port, remote FC port, SUBSYS NQN> 340256d5f4f1SJames Smart * 340356d5f4f1SJames Smart * The ports don't need to be compared as they are intrinsically 340456d5f4f1SJames Smart * already matched by the port pointers supplied. 340556d5f4f1SJames Smart */ 340656d5f4f1SJames Smart static bool 340756d5f4f1SJames Smart nvme_fc_existing_controller(struct nvme_fc_rport *rport, 340856d5f4f1SJames Smart struct nvmf_ctrl_options *opts) 340956d5f4f1SJames Smart { 341056d5f4f1SJames Smart struct nvme_fc_ctrl *ctrl; 341156d5f4f1SJames Smart unsigned long flags; 341256d5f4f1SJames Smart bool found = false; 341356d5f4f1SJames Smart 341456d5f4f1SJames Smart spin_lock_irqsave(&rport->lock, flags); 341556d5f4f1SJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { 341656d5f4f1SJames Smart found = nvmf_ctlr_matches_baseopts(&ctrl->ctrl, opts); 341756d5f4f1SJames Smart if (found) 341856d5f4f1SJames Smart break; 341956d5f4f1SJames Smart } 342056d5f4f1SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 342156d5f4f1SJames Smart 342256d5f4f1SJames Smart return found; 342356d5f4f1SJames Smart } 342456d5f4f1SJames Smart 3425e399441dSJames Smart static struct nvme_ctrl * 342661bff8efSJames Smart nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, 3427e399441dSJames Smart struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) 3428e399441dSJames Smart { 3429e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 3430e399441dSJames Smart unsigned long flags; 3431f673714aSJames Smart int ret, idx, ctrl_loss_tmo; 3432e399441dSJames Smart 343385e6a6adSJames Smart if (!(rport->remoteport.port_role & 343485e6a6adSJames Smart (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) { 343585e6a6adSJames Smart ret = -EBADR; 343685e6a6adSJames Smart goto out_fail; 343785e6a6adSJames Smart } 343885e6a6adSJames Smart 343956d5f4f1SJames Smart if (!opts->duplicate_connect && 344056d5f4f1SJames Smart nvme_fc_existing_controller(rport, opts)) { 344156d5f4f1SJames Smart ret = -EALREADY; 344256d5f4f1SJames Smart goto out_fail; 344356d5f4f1SJames Smart } 344456d5f4f1SJames Smart 3445e399441dSJames Smart ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 3446e399441dSJames Smart if (!ctrl) { 3447e399441dSJames Smart ret = -ENOMEM; 3448e399441dSJames Smart goto out_fail; 3449e399441dSJames Smart } 3450e399441dSJames Smart 3451e399441dSJames Smart idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); 3452e399441dSJames Smart if (idx < 0) { 3453e399441dSJames Smart ret = -ENOSPC; 34548c5c6605SJames Smart goto out_free_ctrl; 3455e399441dSJames Smart } 3456e399441dSJames Smart 3457f673714aSJames Smart /* 3458f673714aSJames Smart * if ctrl_loss_tmo is being enforced and the default reconnect delay 3459f673714aSJames Smart * is being used, change to a shorter reconnect delay for FC. 3460f673714aSJames Smart */ 3461f673714aSJames Smart if (opts->max_reconnects != -1 && 3462f673714aSJames Smart opts->reconnect_delay == NVMF_DEF_RECONNECT_DELAY && 3463f673714aSJames Smart opts->reconnect_delay > NVME_FC_DEFAULT_RECONNECT_TMO) { 3464f673714aSJames Smart ctrl_loss_tmo = opts->max_reconnects * opts->reconnect_delay; 3465f673714aSJames Smart opts->reconnect_delay = NVME_FC_DEFAULT_RECONNECT_TMO; 3466f673714aSJames Smart opts->max_reconnects = DIV_ROUND_UP(ctrl_loss_tmo, 3467f673714aSJames Smart opts->reconnect_delay); 3468f673714aSJames Smart } 3469f673714aSJames Smart 3470e399441dSJames Smart ctrl->ctrl.opts = opts; 34714c984154SJames Smart ctrl->ctrl.nr_reconnects = 0; 347206f3d71eSJames Smart if (lport->dev) 3473103e515eSHannes Reinecke ctrl->ctrl.numa_node = dev_to_node(lport->dev); 347406f3d71eSJames Smart else 347506f3d71eSJames Smart ctrl->ctrl.numa_node = NUMA_NO_NODE; 3476e399441dSJames Smart INIT_LIST_HEAD(&ctrl->ctrl_list); 3477e399441dSJames Smart ctrl->lport = lport; 3478e399441dSJames Smart ctrl->rport = rport; 3479e399441dSJames Smart ctrl->dev = lport->dev; 3480e399441dSJames Smart ctrl->cnum = idx; 34814c984154SJames Smart ctrl->ioq_live = false; 34828a82dbf1SJames Smart init_waitqueue_head(&ctrl->ioabort_wait); 3483e399441dSJames Smart 3484e399441dSJames Smart get_device(ctrl->dev); 3485e399441dSJames Smart kref_init(&ctrl->ref); 3486e399441dSJames Smart 3487d86c4d8eSChristoph Hellwig INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work); 348861bff8efSJames Smart INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work); 348919fce047SJames Smart INIT_WORK(&ctrl->ioerr_work, nvme_fc_ctrl_ioerr_work); 3490e399441dSJames Smart spin_lock_init(&ctrl->lock); 3491e399441dSJames Smart 3492e399441dSJames Smart /* io queue count */ 3493d858e5f0SSagi Grimberg ctrl->ctrl.queue_count = min_t(unsigned int, 3494e399441dSJames Smart opts->nr_io_queues, 3495e399441dSJames Smart lport->ops->max_hw_queues); 3496d858e5f0SSagi Grimberg ctrl->ctrl.queue_count++; /* +1 for admin queue */ 3497e399441dSJames Smart 3498e399441dSJames Smart ctrl->ctrl.sqsize = opts->queue_size - 1; 3499e399441dSJames Smart ctrl->ctrl.kato = opts->kato; 35004c984154SJames Smart ctrl->ctrl.cntlid = 0xffff; 3501e399441dSJames Smart 3502e399441dSJames Smart ret = -ENOMEM; 3503d858e5f0SSagi Grimberg ctrl->queues = kcalloc(ctrl->ctrl.queue_count, 3504d858e5f0SSagi Grimberg sizeof(struct nvme_fc_queue), GFP_KERNEL); 3505e399441dSJames Smart if (!ctrl->queues) 350661bff8efSJames Smart goto out_free_ida; 3507e399441dSJames Smart 35083e493c00SJames Smart nvme_fc_init_queue(ctrl, 0); 35093e493c00SJames Smart 351061bff8efSJames Smart memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); 351161bff8efSJames Smart ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; 351238dabe21SKeith Busch ctrl->admin_tag_set.queue_depth = NVME_AQ_MQ_TAG_DEPTH; 3513ed01fee2SChristoph Hellwig ctrl->admin_tag_set.reserved_tags = NVMF_RESERVED_TAGS; 3514103e515eSHannes Reinecke ctrl->admin_tag_set.numa_node = ctrl->ctrl.numa_node; 3515d3d0bc78SBart Van Assche ctrl->admin_tag_set.cmd_size = 3516d3d0bc78SBart Van Assche struct_size((struct nvme_fcp_op_w_sgl *)NULL, priv, 3517d3d0bc78SBart Van Assche ctrl->lport->ops->fcprqst_priv_sz); 351861bff8efSJames Smart ctrl->admin_tag_set.driver_data = ctrl; 351961bff8efSJames Smart ctrl->admin_tag_set.nr_hw_queues = 1; 3520dc96f938SChaitanya Kulkarni ctrl->admin_tag_set.timeout = NVME_ADMIN_TIMEOUT; 35215a22e2bfSIsrael Rukshin ctrl->admin_tag_set.flags = BLK_MQ_F_NO_SCHED; 352261bff8efSJames Smart 352361bff8efSJames Smart ret = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); 3524e399441dSJames Smart if (ret) 352561bff8efSJames Smart goto out_free_queues; 352634b6c231SSagi Grimberg ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; 3527e399441dSJames Smart 3528e7832cb4SSagi Grimberg ctrl->ctrl.fabrics_q = blk_mq_init_queue(&ctrl->admin_tag_set); 3529e7832cb4SSagi Grimberg if (IS_ERR(ctrl->ctrl.fabrics_q)) { 3530e7832cb4SSagi Grimberg ret = PTR_ERR(ctrl->ctrl.fabrics_q); 3531e7832cb4SSagi Grimberg goto out_free_admin_tag_set; 3532e7832cb4SSagi Grimberg } 3533e7832cb4SSagi Grimberg 353461bff8efSJames Smart ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); 353561bff8efSJames Smart if (IS_ERR(ctrl->ctrl.admin_q)) { 353661bff8efSJames Smart ret = PTR_ERR(ctrl->ctrl.admin_q); 3537e7832cb4SSagi Grimberg goto out_cleanup_fabrics_q; 3538e399441dSJames Smart } 3539e399441dSJames Smart 354061bff8efSJames Smart /* 354161bff8efSJames Smart * Would have been nice to init io queues tag set as well. 354261bff8efSJames Smart * However, we require interaction from the controller 354361bff8efSJames Smart * for max io queue count before we can do so. 354461bff8efSJames Smart * Defer this to the connect path. 354561bff8efSJames Smart */ 3546e399441dSJames Smart 354761bff8efSJames Smart ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); 3548e399441dSJames Smart if (ret) 354961bff8efSJames Smart goto out_cleanup_admin_q; 3550e399441dSJames Smart 355161bff8efSJames Smart /* at this point, teardown path changes to ref counting on nvme ctrl */ 3552e399441dSJames Smart 3553e399441dSJames Smart spin_lock_irqsave(&rport->lock, flags); 3554e399441dSJames Smart list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); 3555e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 3556e399441dSJames Smart 35574c984154SJames Smart if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING) || 35584c984154SJames Smart !nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) { 35594c984154SJames Smart dev_err(ctrl->ctrl.device, 35604c984154SJames Smart "NVME-FC{%d}: failed to init ctrl state\n", ctrl->cnum); 35614c984154SJames Smart goto fail_ctrl; 356217c4dc6eSJames Smart } 356317c4dc6eSJames Smart 35644c984154SJames Smart if (!queue_delayed_work(nvme_wq, &ctrl->connect_work, 0)) { 35654c984154SJames Smart dev_err(ctrl->ctrl.device, 35664c984154SJames Smart "NVME-FC{%d}: failed to schedule initial connect\n", 35674c984154SJames Smart ctrl->cnum); 35684c984154SJames Smart goto fail_ctrl; 35694c984154SJames Smart } 35704c984154SJames Smart 35714c984154SJames Smart flush_delayed_work(&ctrl->connect_work); 35724c984154SJames Smart 35734c984154SJames Smart dev_info(ctrl->ctrl.device, 35744c984154SJames Smart "NVME-FC{%d}: new ctrl: NQN \"%s\"\n", 35754c984154SJames Smart ctrl->cnum, ctrl->ctrl.opts->subsysnqn); 35764c984154SJames Smart 35774c984154SJames Smart return &ctrl->ctrl; 35784c984154SJames Smart 35794c984154SJames Smart fail_ctrl: 3580cf25809bSJames Smart nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING); 358119fce047SJames Smart cancel_work_sync(&ctrl->ioerr_work); 3582cf25809bSJames Smart cancel_work_sync(&ctrl->ctrl.reset_work); 3583cf25809bSJames Smart cancel_delayed_work_sync(&ctrl->connect_work); 3584cf25809bSJames Smart 3585de41447aSEwan D. Milne ctrl->ctrl.opts = NULL; 358617c4dc6eSJames Smart 358761bff8efSJames Smart /* initiate nvme ctrl ref counting teardown */ 358861bff8efSJames Smart nvme_uninit_ctrl(&ctrl->ctrl); 358961bff8efSJames Smart 35900b5a7669SJames Smart /* Remove core ctrl ref. */ 35910b5a7669SJames Smart nvme_put_ctrl(&ctrl->ctrl); 35920b5a7669SJames Smart 359361bff8efSJames Smart /* as we're past the point where we transition to the ref 359461bff8efSJames Smart * counting teardown path, if we return a bad pointer here, 359561bff8efSJames Smart * the calling routine, thinking it's prior to the 359661bff8efSJames Smart * transition, will do an rport put. Since the teardown 359761bff8efSJames Smart * path also does a rport put, we do an extra get here to 359861bff8efSJames Smart * so proper order/teardown happens. 359961bff8efSJames Smart */ 360061bff8efSJames Smart nvme_fc_rport_get(rport); 360161bff8efSJames Smart 36024c984154SJames Smart return ERR_PTR(-EIO); 3603e399441dSJames Smart 360461bff8efSJames Smart out_cleanup_admin_q: 360561bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.admin_q); 3606e7832cb4SSagi Grimberg out_cleanup_fabrics_q: 3607e7832cb4SSagi Grimberg blk_cleanup_queue(ctrl->ctrl.fabrics_q); 360861bff8efSJames Smart out_free_admin_tag_set: 360961bff8efSJames Smart blk_mq_free_tag_set(&ctrl->admin_tag_set); 361061bff8efSJames Smart out_free_queues: 361161bff8efSJames Smart kfree(ctrl->queues); 3612e399441dSJames Smart out_free_ida: 361361bff8efSJames Smart put_device(ctrl->dev); 3614e399441dSJames Smart ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); 3615e399441dSJames Smart out_free_ctrl: 3616e399441dSJames Smart kfree(ctrl); 3617e399441dSJames Smart out_fail: 3618e399441dSJames Smart /* exit via here doesn't follow ctlr ref points */ 3619e399441dSJames Smart return ERR_PTR(ret); 3620e399441dSJames Smart } 3621e399441dSJames Smart 3622e399441dSJames Smart 3623e399441dSJames Smart struct nvmet_fc_traddr { 3624e399441dSJames Smart u64 nn; 3625e399441dSJames Smart u64 pn; 3626e399441dSJames Smart }; 3627e399441dSJames Smart 3628e399441dSJames Smart static int 36299c5358e1SJames Smart __nvme_fc_parse_u64(substring_t *sstr, u64 *val) 3630e399441dSJames Smart { 3631e399441dSJames Smart u64 token64; 3632e399441dSJames Smart 36339c5358e1SJames Smart if (match_u64(sstr, &token64)) 36349c5358e1SJames Smart return -EINVAL; 36359c5358e1SJames Smart *val = token64; 3636e399441dSJames Smart 36379c5358e1SJames Smart return 0; 3638e399441dSJames Smart } 3639e399441dSJames Smart 36409c5358e1SJames Smart /* 36419c5358e1SJames Smart * This routine validates and extracts the WWN's from the TRADDR string. 36429c5358e1SJames Smart * As kernel parsers need the 0x to determine number base, universally 36439c5358e1SJames Smart * build string to parse with 0x prefix before parsing name strings. 36449c5358e1SJames Smart */ 36459c5358e1SJames Smart static int 36469c5358e1SJames Smart nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen) 36479c5358e1SJames Smart { 36489c5358e1SJames Smart char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1]; 36499c5358e1SJames Smart substring_t wwn = { name, &name[sizeof(name)-1] }; 36509c5358e1SJames Smart int nnoffset, pnoffset; 36519c5358e1SJames Smart 3652d4e4230cSMilan P. Gandhi /* validate if string is one of the 2 allowed formats */ 36539c5358e1SJames Smart if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH && 36549c5358e1SJames Smart !strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) && 36559c5358e1SJames Smart !strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET], 36569c5358e1SJames Smart "pn-0x", NVME_FC_TRADDR_OXNNLEN)) { 36579c5358e1SJames Smart nnoffset = NVME_FC_TRADDR_OXNNLEN; 36589c5358e1SJames Smart pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET + 36599c5358e1SJames Smart NVME_FC_TRADDR_OXNNLEN; 36609c5358e1SJames Smart } else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH && 36619c5358e1SJames Smart !strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) && 36629c5358e1SJames Smart !strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET], 36639c5358e1SJames Smart "pn-", NVME_FC_TRADDR_NNLEN))) { 36649c5358e1SJames Smart nnoffset = NVME_FC_TRADDR_NNLEN; 36659c5358e1SJames Smart pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN; 36669c5358e1SJames Smart } else 36679c5358e1SJames Smart goto out_einval; 36689c5358e1SJames Smart 36699c5358e1SJames Smart name[0] = '0'; 36709c5358e1SJames Smart name[1] = 'x'; 36719c5358e1SJames Smart name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0; 36729c5358e1SJames Smart 36739c5358e1SJames Smart memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN); 36749c5358e1SJames Smart if (__nvme_fc_parse_u64(&wwn, &traddr->nn)) 36759c5358e1SJames Smart goto out_einval; 36769c5358e1SJames Smart 36779c5358e1SJames Smart memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN); 36789c5358e1SJames Smart if (__nvme_fc_parse_u64(&wwn, &traddr->pn)) 36799c5358e1SJames Smart goto out_einval; 36809c5358e1SJames Smart 36819c5358e1SJames Smart return 0; 36829c5358e1SJames Smart 36839c5358e1SJames Smart out_einval: 36849c5358e1SJames Smart pr_warn("%s: bad traddr string\n", __func__); 36859c5358e1SJames Smart return -EINVAL; 3686e399441dSJames Smart } 3687e399441dSJames Smart 3688e399441dSJames Smart static struct nvme_ctrl * 3689e399441dSJames Smart nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) 3690e399441dSJames Smart { 3691e399441dSJames Smart struct nvme_fc_lport *lport; 3692e399441dSJames Smart struct nvme_fc_rport *rport; 369361bff8efSJames Smart struct nvme_ctrl *ctrl; 3694e399441dSJames Smart struct nvmet_fc_traddr laddr = { 0L, 0L }; 3695e399441dSJames Smart struct nvmet_fc_traddr raddr = { 0L, 0L }; 3696e399441dSJames Smart unsigned long flags; 3697e399441dSJames Smart int ret; 3698e399441dSJames Smart 36999c5358e1SJames Smart ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE); 3700e399441dSJames Smart if (ret || !raddr.nn || !raddr.pn) 3701e399441dSJames Smart return ERR_PTR(-EINVAL); 3702e399441dSJames Smart 37039c5358e1SJames Smart ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE); 3704e399441dSJames Smart if (ret || !laddr.nn || !laddr.pn) 3705e399441dSJames Smart return ERR_PTR(-EINVAL); 3706e399441dSJames Smart 3707e399441dSJames Smart /* find the host and remote ports to connect together */ 3708e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 3709e399441dSJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 3710e399441dSJames Smart if (lport->localport.node_name != laddr.nn || 37119e0e8dacSJames Smart lport->localport.port_name != laddr.pn || 37129e0e8dacSJames Smart lport->localport.port_state != FC_OBJSTATE_ONLINE) 3713e399441dSJames Smart continue; 3714e399441dSJames Smart 3715e399441dSJames Smart list_for_each_entry(rport, &lport->endp_list, endp_list) { 3716e399441dSJames Smart if (rport->remoteport.node_name != raddr.nn || 37179e0e8dacSJames Smart rport->remoteport.port_name != raddr.pn || 37189e0e8dacSJames Smart rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 3719e399441dSJames Smart continue; 3720e399441dSJames Smart 3721e399441dSJames Smart /* if fail to get reference fall through. Will error */ 3722e399441dSJames Smart if (!nvme_fc_rport_get(rport)) 3723e399441dSJames Smart break; 3724e399441dSJames Smart 3725e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3726e399441dSJames Smart 372761bff8efSJames Smart ctrl = nvme_fc_init_ctrl(dev, opts, lport, rport); 372861bff8efSJames Smart if (IS_ERR(ctrl)) 372961bff8efSJames Smart nvme_fc_rport_put(rport); 373061bff8efSJames Smart return ctrl; 3731e399441dSJames Smart } 3732e399441dSJames Smart } 3733e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3734e399441dSJames Smart 37354fb135adSJohannes Thumshirn pr_warn("%s: %s - %s combination not found\n", 37364fb135adSJohannes Thumshirn __func__, opts->traddr, opts->host_traddr); 3737e399441dSJames Smart return ERR_PTR(-ENOENT); 3738e399441dSJames Smart } 3739e399441dSJames Smart 3740e399441dSJames Smart 3741e399441dSJames Smart static struct nvmf_transport_ops nvme_fc_transport = { 3742e399441dSJames Smart .name = "fc", 37430de5cd36SRoy Shterman .module = THIS_MODULE, 3744e399441dSJames Smart .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, 37455bbecdbcSJames Smart .allowed_opts = NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_CTRL_LOSS_TMO, 3746e399441dSJames Smart .create_ctrl = nvme_fc_create_ctrl, 3747e399441dSJames Smart }; 3748e399441dSJames Smart 374997faec53SJames Smart /* Arbitrary successive failures max. With lots of subsystems could be high */ 375097faec53SJames Smart #define DISCOVERY_MAX_FAIL 20 375197faec53SJames Smart 375297faec53SJames Smart static ssize_t nvme_fc_nvme_discovery_store(struct device *dev, 375397faec53SJames Smart struct device_attribute *attr, const char *buf, size_t count) 375497faec53SJames Smart { 375597faec53SJames Smart unsigned long flags; 375697faec53SJames Smart LIST_HEAD(local_disc_list); 375797faec53SJames Smart struct nvme_fc_lport *lport; 375897faec53SJames Smart struct nvme_fc_rport *rport; 375997faec53SJames Smart int failcnt = 0; 376097faec53SJames Smart 376197faec53SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 376297faec53SJames Smart restart: 376397faec53SJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 376497faec53SJames Smart list_for_each_entry(rport, &lport->endp_list, endp_list) { 376597faec53SJames Smart if (!nvme_fc_lport_get(lport)) 376697faec53SJames Smart continue; 376797faec53SJames Smart if (!nvme_fc_rport_get(rport)) { 376897faec53SJames Smart /* 376997faec53SJames Smart * This is a temporary condition. Upon restart 377097faec53SJames Smart * this rport will be gone from the list. 377197faec53SJames Smart * 377297faec53SJames Smart * Revert the lport put and retry. Anything 377397faec53SJames Smart * added to the list already will be skipped (as 377497faec53SJames Smart * they are no longer list_empty). Loops should 377597faec53SJames Smart * resume at rports that were not yet seen. 377697faec53SJames Smart */ 377797faec53SJames Smart nvme_fc_lport_put(lport); 377897faec53SJames Smart 377997faec53SJames Smart if (failcnt++ < DISCOVERY_MAX_FAIL) 378097faec53SJames Smart goto restart; 378197faec53SJames Smart 378297faec53SJames Smart pr_err("nvme_discovery: too many reference " 378397faec53SJames Smart "failures\n"); 378497faec53SJames Smart goto process_local_list; 378597faec53SJames Smart } 378697faec53SJames Smart if (list_empty(&rport->disc_list)) 378797faec53SJames Smart list_add_tail(&rport->disc_list, 378897faec53SJames Smart &local_disc_list); 378997faec53SJames Smart } 379097faec53SJames Smart } 379197faec53SJames Smart 379297faec53SJames Smart process_local_list: 379397faec53SJames Smart while (!list_empty(&local_disc_list)) { 379497faec53SJames Smart rport = list_first_entry(&local_disc_list, 379597faec53SJames Smart struct nvme_fc_rport, disc_list); 379697faec53SJames Smart list_del_init(&rport->disc_list); 379797faec53SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 379897faec53SJames Smart 379997faec53SJames Smart lport = rport->lport; 380097faec53SJames Smart /* signal discovery. Won't hurt if it repeats */ 380197faec53SJames Smart nvme_fc_signal_discovery_scan(lport, rport); 380297faec53SJames Smart nvme_fc_rport_put(rport); 380397faec53SJames Smart nvme_fc_lport_put(lport); 380497faec53SJames Smart 380597faec53SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 380697faec53SJames Smart } 380797faec53SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 380897faec53SJames Smart 380997faec53SJames Smart return count; 381097faec53SJames Smart } 381197faec53SJames Smart static DEVICE_ATTR(nvme_discovery, 0200, NULL, nvme_fc_nvme_discovery_store); 381297faec53SJames Smart 381397faec53SJames Smart static struct attribute *nvme_fc_attrs[] = { 381497faec53SJames Smart &dev_attr_nvme_discovery.attr, 381597faec53SJames Smart NULL 381697faec53SJames Smart }; 381797faec53SJames Smart 381860b152a5SRikard Falkeborn static const struct attribute_group nvme_fc_attr_group = { 381997faec53SJames Smart .attrs = nvme_fc_attrs, 382097faec53SJames Smart }; 382197faec53SJames Smart 382297faec53SJames Smart static const struct attribute_group *nvme_fc_attr_groups[] = { 382397faec53SJames Smart &nvme_fc_attr_group, 382497faec53SJames Smart NULL 382597faec53SJames Smart }; 382697faec53SJames Smart 382797faec53SJames Smart static struct class fc_class = { 382897faec53SJames Smart .name = "fc", 382997faec53SJames Smart .dev_groups = nvme_fc_attr_groups, 383097faec53SJames Smart .owner = THIS_MODULE, 383197faec53SJames Smart }; 383297faec53SJames Smart 3833e399441dSJames Smart static int __init nvme_fc_init_module(void) 3834e399441dSJames Smart { 38355f568556SJames Smart int ret; 38365f568556SJames Smart 38378730c1ddSHannes Reinecke nvme_fc_wq = alloc_workqueue("nvme_fc_wq", WQ_MEM_RECLAIM, 0); 38388730c1ddSHannes Reinecke if (!nvme_fc_wq) 38398730c1ddSHannes Reinecke return -ENOMEM; 38408730c1ddSHannes Reinecke 38415f568556SJames Smart /* 38425f568556SJames Smart * NOTE: 38435f568556SJames Smart * It is expected that in the future the kernel will combine 38445f568556SJames Smart * the FC-isms that are currently under scsi and now being 38455f568556SJames Smart * added to by NVME into a new standalone FC class. The SCSI 38465f568556SJames Smart * and NVME protocols and their devices would be under this 38475f568556SJames Smart * new FC class. 38485f568556SJames Smart * 38495f568556SJames Smart * As we need something to post FC-specific udev events to, 38505f568556SJames Smart * specifically for nvme probe events, start by creating the 38515f568556SJames Smart * new device class. When the new standalone FC class is 38525f568556SJames Smart * put in place, this code will move to a more generic 38535f568556SJames Smart * location for the class. 38545f568556SJames Smart */ 385597faec53SJames Smart ret = class_register(&fc_class); 385697faec53SJames Smart if (ret) { 38575f568556SJames Smart pr_err("couldn't register class fc\n"); 38588730c1ddSHannes Reinecke goto out_destroy_wq; 38595f568556SJames Smart } 38605f568556SJames Smart 38615f568556SJames Smart /* 38625f568556SJames Smart * Create a device for the FC-centric udev events 38635f568556SJames Smart */ 386497faec53SJames Smart fc_udev_device = device_create(&fc_class, NULL, MKDEV(0, 0), NULL, 38655f568556SJames Smart "fc_udev_device"); 38665f568556SJames Smart if (IS_ERR(fc_udev_device)) { 38675f568556SJames Smart pr_err("couldn't create fc_udev device!\n"); 38685f568556SJames Smart ret = PTR_ERR(fc_udev_device); 38695f568556SJames Smart goto out_destroy_class; 38705f568556SJames Smart } 38715f568556SJames Smart 38725f568556SJames Smart ret = nvmf_register_transport(&nvme_fc_transport); 38735f568556SJames Smart if (ret) 38745f568556SJames Smart goto out_destroy_device; 38755f568556SJames Smart 38765f568556SJames Smart return 0; 38775f568556SJames Smart 38785f568556SJames Smart out_destroy_device: 387997faec53SJames Smart device_destroy(&fc_class, MKDEV(0, 0)); 38805f568556SJames Smart out_destroy_class: 388197faec53SJames Smart class_unregister(&fc_class); 38828730c1ddSHannes Reinecke out_destroy_wq: 38838730c1ddSHannes Reinecke destroy_workqueue(nvme_fc_wq); 38848730c1ddSHannes Reinecke 38855f568556SJames Smart return ret; 3886e399441dSJames Smart } 3887e399441dSJames Smart 38884c73cbdfSJames Smart static void 38894c73cbdfSJames Smart nvme_fc_delete_controllers(struct nvme_fc_rport *rport) 38904c73cbdfSJames Smart { 38914c73cbdfSJames Smart struct nvme_fc_ctrl *ctrl; 38924c73cbdfSJames Smart 38934c73cbdfSJames Smart spin_lock(&rport->lock); 38944c73cbdfSJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { 38954c73cbdfSJames Smart dev_warn(ctrl->ctrl.device, 38964c73cbdfSJames Smart "NVME-FC{%d}: transport unloading: deleting ctrl\n", 38974c73cbdfSJames Smart ctrl->cnum); 38984c73cbdfSJames Smart nvme_delete_ctrl(&ctrl->ctrl); 38994c73cbdfSJames Smart } 39004c73cbdfSJames Smart spin_unlock(&rport->lock); 39014c73cbdfSJames Smart } 39024c73cbdfSJames Smart 39034c73cbdfSJames Smart static void 39044c73cbdfSJames Smart nvme_fc_cleanup_for_unload(void) 39054c73cbdfSJames Smart { 39064c73cbdfSJames Smart struct nvme_fc_lport *lport; 39074c73cbdfSJames Smart struct nvme_fc_rport *rport; 39084c73cbdfSJames Smart 39094c73cbdfSJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 39104c73cbdfSJames Smart list_for_each_entry(rport, &lport->endp_list, endp_list) { 39114c73cbdfSJames Smart nvme_fc_delete_controllers(rport); 39124c73cbdfSJames Smart } 39134c73cbdfSJames Smart } 39144c73cbdfSJames Smart } 39154c73cbdfSJames Smart 3916e399441dSJames Smart static void __exit nvme_fc_exit_module(void) 3917e399441dSJames Smart { 39184c73cbdfSJames Smart unsigned long flags; 39194c73cbdfSJames Smart bool need_cleanup = false; 39204c73cbdfSJames Smart 39214c73cbdfSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 39224c73cbdfSJames Smart nvme_fc_waiting_to_unload = true; 39234c73cbdfSJames Smart if (!list_empty(&nvme_fc_lport_list)) { 39244c73cbdfSJames Smart need_cleanup = true; 39254c73cbdfSJames Smart nvme_fc_cleanup_for_unload(); 39264c73cbdfSJames Smart } 39274c73cbdfSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 39284c73cbdfSJames Smart if (need_cleanup) { 39294c73cbdfSJames Smart pr_info("%s: waiting for ctlr deletes\n", __func__); 39304c73cbdfSJames Smart wait_for_completion(&nvme_fc_unload_proceed); 39314c73cbdfSJames Smart pr_info("%s: ctrl deletes complete\n", __func__); 39324c73cbdfSJames Smart } 3933e399441dSJames Smart 3934e399441dSJames Smart nvmf_unregister_transport(&nvme_fc_transport); 3935e399441dSJames Smart 3936e399441dSJames Smart ida_destroy(&nvme_fc_local_port_cnt); 3937e399441dSJames Smart ida_destroy(&nvme_fc_ctrl_cnt); 39385f568556SJames Smart 393997faec53SJames Smart device_destroy(&fc_class, MKDEV(0, 0)); 394097faec53SJames Smart class_unregister(&fc_class); 39418730c1ddSHannes Reinecke destroy_workqueue(nvme_fc_wq); 3942e399441dSJames Smart } 3943e399441dSJames Smart 3944e399441dSJames Smart module_init(nvme_fc_init_module); 3945e399441dSJames Smart module_exit(nvme_fc_exit_module); 3946e399441dSJames Smart 3947e399441dSJames Smart MODULE_LICENSE("GPL v2"); 3948