1e399441dSJames Smart /* 2e399441dSJames Smart * Copyright (c) 2016 Avago Technologies. All rights reserved. 3e399441dSJames Smart * 4e399441dSJames Smart * This program is free software; you can redistribute it and/or modify 5e399441dSJames Smart * it under the terms of version 2 of the GNU General Public License as 6e399441dSJames Smart * published by the Free Software Foundation. 7e399441dSJames Smart * 8e399441dSJames Smart * This program is distributed in the hope that it will be useful. 9e399441dSJames Smart * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, 10e399441dSJames Smart * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A 11e399441dSJames Smart * PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO 12e399441dSJames Smart * THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID. 13e399441dSJames Smart * See the GNU General Public License for more details, a copy of which 14e399441dSJames Smart * can be found in the file COPYING included with this package 15e399441dSJames Smart * 16e399441dSJames Smart */ 17e399441dSJames Smart #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18e399441dSJames Smart #include <linux/module.h> 19e399441dSJames Smart #include <linux/parser.h> 20e399441dSJames Smart #include <uapi/scsi/fc/fc_fs.h> 21e399441dSJames Smart #include <uapi/scsi/fc/fc_els.h> 2261bff8efSJames Smart #include <linux/delay.h> 23e399441dSJames Smart 24e399441dSJames Smart #include "nvme.h" 25e399441dSJames Smart #include "fabrics.h" 26e399441dSJames Smart #include <linux/nvme-fc-driver.h> 27e399441dSJames Smart #include <linux/nvme-fc.h> 28e399441dSJames Smart 29e399441dSJames Smart 30e399441dSJames Smart /* *************************** Data Structures/Defines ****************** */ 31e399441dSJames Smart 32e399441dSJames Smart 33e399441dSJames Smart enum nvme_fc_queue_flags { 3426c0a26dSJens Axboe NVME_FC_Q_CONNECTED = 0, 3526c0a26dSJens Axboe NVME_FC_Q_LIVE, 36e399441dSJames Smart }; 37e399441dSJames Smart 38ac7fe82bSJames Smart #define NVME_FC_DEFAULT_DEV_LOSS_TMO 60 /* seconds */ 39ac7fe82bSJames Smart 40e399441dSJames Smart struct nvme_fc_queue { 41e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 42e399441dSJames Smart struct device *dev; 43e399441dSJames Smart struct blk_mq_hw_ctx *hctx; 44e399441dSJames Smart void *lldd_handle; 45e399441dSJames Smart size_t cmnd_capsule_len; 46e399441dSJames Smart u32 qnum; 47e399441dSJames Smart u32 rqcnt; 48e399441dSJames Smart u32 seqno; 49e399441dSJames Smart 50e399441dSJames Smart u64 connection_id; 51e399441dSJames Smart atomic_t csn; 52e399441dSJames Smart 53e399441dSJames Smart unsigned long flags; 54e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 55e399441dSJames Smart 568d64daf7SJames Smart enum nvme_fcop_flags { 578d64daf7SJames Smart FCOP_FLAGS_TERMIO = (1 << 0), 588d64daf7SJames Smart FCOP_FLAGS_RELEASED = (1 << 1), 598d64daf7SJames Smart FCOP_FLAGS_COMPLETE = (1 << 2), 6078a7ac26SJames Smart FCOP_FLAGS_AEN = (1 << 3), 618d64daf7SJames Smart }; 628d64daf7SJames Smart 63e399441dSJames Smart struct nvmefc_ls_req_op { 64e399441dSJames Smart struct nvmefc_ls_req ls_req; 65e399441dSJames Smart 66c913a8b0SJames Smart struct nvme_fc_rport *rport; 67e399441dSJames Smart struct nvme_fc_queue *queue; 68e399441dSJames Smart struct request *rq; 698d64daf7SJames Smart u32 flags; 70e399441dSJames Smart 71e399441dSJames Smart int ls_error; 72e399441dSJames Smart struct completion ls_done; 73c913a8b0SJames Smart struct list_head lsreq_list; /* rport->ls_req_list */ 74e399441dSJames Smart bool req_queued; 75e399441dSJames Smart }; 76e399441dSJames Smart 77e399441dSJames Smart enum nvme_fcpop_state { 78e399441dSJames Smart FCPOP_STATE_UNINIT = 0, 79e399441dSJames Smart FCPOP_STATE_IDLE = 1, 80e399441dSJames Smart FCPOP_STATE_ACTIVE = 2, 81e399441dSJames Smart FCPOP_STATE_ABORTED = 3, 8278a7ac26SJames Smart FCPOP_STATE_COMPLETE = 4, 83e399441dSJames Smart }; 84e399441dSJames Smart 85e399441dSJames Smart struct nvme_fc_fcp_op { 86e399441dSJames Smart struct nvme_request nreq; /* 87e399441dSJames Smart * nvme/host/core.c 88e399441dSJames Smart * requires this to be 89e399441dSJames Smart * the 1st element in the 90e399441dSJames Smart * private structure 91e399441dSJames Smart * associated with the 92e399441dSJames Smart * request. 93e399441dSJames Smart */ 94e399441dSJames Smart struct nvmefc_fcp_req fcp_req; 95e399441dSJames Smart 96e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 97e399441dSJames Smart struct nvme_fc_queue *queue; 98e399441dSJames Smart struct request *rq; 99e399441dSJames Smart 100e399441dSJames Smart atomic_t state; 10178a7ac26SJames Smart u32 flags; 102e399441dSJames Smart u32 rqno; 103e399441dSJames Smart u32 nents; 104e399441dSJames Smart 105e399441dSJames Smart struct nvme_fc_cmd_iu cmd_iu; 106e399441dSJames Smart struct nvme_fc_ersp_iu rsp_iu; 107e399441dSJames Smart }; 108e399441dSJames Smart 109e399441dSJames Smart struct nvme_fc_lport { 110e399441dSJames Smart struct nvme_fc_local_port localport; 111e399441dSJames Smart 112e399441dSJames Smart struct ida endp_cnt; 113e399441dSJames Smart struct list_head port_list; /* nvme_fc_port_list */ 114e399441dSJames Smart struct list_head endp_list; 115e399441dSJames Smart struct device *dev; /* physical device for dma */ 116e399441dSJames Smart struct nvme_fc_port_template *ops; 117e399441dSJames Smart struct kref ref; 118158bfb88SJames Smart atomic_t act_rport_cnt; 119e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 120e399441dSJames Smart 121e399441dSJames Smart struct nvme_fc_rport { 122e399441dSJames Smart struct nvme_fc_remote_port remoteport; 123e399441dSJames Smart 124e399441dSJames Smart struct list_head endp_list; /* for lport->endp_list */ 125e399441dSJames Smart struct list_head ctrl_list; 126c913a8b0SJames Smart struct list_head ls_req_list; 127c913a8b0SJames Smart struct device *dev; /* physical device for dma */ 128c913a8b0SJames Smart struct nvme_fc_lport *lport; 129e399441dSJames Smart spinlock_t lock; 130e399441dSJames Smart struct kref ref; 131158bfb88SJames Smart atomic_t act_ctrl_cnt; 1322b632970SJames Smart unsigned long dev_loss_end; 133e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 134e399441dSJames Smart 13561bff8efSJames Smart enum nvme_fcctrl_flags { 13661bff8efSJames Smart FCCTRL_TERMIO = (1 << 0), 137e399441dSJames Smart }; 138e399441dSJames Smart 139e399441dSJames Smart struct nvme_fc_ctrl { 140e399441dSJames Smart spinlock_t lock; 141e399441dSJames Smart struct nvme_fc_queue *queues; 142e399441dSJames Smart struct device *dev; 143e399441dSJames Smart struct nvme_fc_lport *lport; 144e399441dSJames Smart struct nvme_fc_rport *rport; 145e399441dSJames Smart u32 cnum; 146e399441dSJames Smart 147158bfb88SJames Smart bool assoc_active; 148e399441dSJames Smart u64 association_id; 149e399441dSJames Smart 150e399441dSJames Smart struct list_head ctrl_list; /* rport->ctrl_list */ 151e399441dSJames Smart 152e399441dSJames Smart struct blk_mq_tag_set admin_tag_set; 153e399441dSJames Smart struct blk_mq_tag_set tag_set; 154e399441dSJames Smart 15561bff8efSJames Smart struct delayed_work connect_work; 15661bff8efSJames Smart 157e399441dSJames Smart struct kref ref; 15861bff8efSJames Smart u32 flags; 15961bff8efSJames Smart u32 iocnt; 16036715cf4SJames Smart wait_queue_head_t ioabort_wait; 161e399441dSJames Smart 16238dabe21SKeith Busch struct nvme_fc_fcp_op aen_ops[NVME_NR_AEN_COMMANDS]; 163e399441dSJames Smart 164e399441dSJames Smart struct nvme_ctrl ctrl; 165e399441dSJames Smart }; 166e399441dSJames Smart 167e399441dSJames Smart static inline struct nvme_fc_ctrl * 168e399441dSJames Smart to_fc_ctrl(struct nvme_ctrl *ctrl) 169e399441dSJames Smart { 170e399441dSJames Smart return container_of(ctrl, struct nvme_fc_ctrl, ctrl); 171e399441dSJames Smart } 172e399441dSJames Smart 173e399441dSJames Smart static inline struct nvme_fc_lport * 174e399441dSJames Smart localport_to_lport(struct nvme_fc_local_port *portptr) 175e399441dSJames Smart { 176e399441dSJames Smart return container_of(portptr, struct nvme_fc_lport, localport); 177e399441dSJames Smart } 178e399441dSJames Smart 179e399441dSJames Smart static inline struct nvme_fc_rport * 180e399441dSJames Smart remoteport_to_rport(struct nvme_fc_remote_port *portptr) 181e399441dSJames Smart { 182e399441dSJames Smart return container_of(portptr, struct nvme_fc_rport, remoteport); 183e399441dSJames Smart } 184e399441dSJames Smart 185e399441dSJames Smart static inline struct nvmefc_ls_req_op * 186e399441dSJames Smart ls_req_to_lsop(struct nvmefc_ls_req *lsreq) 187e399441dSJames Smart { 188e399441dSJames Smart return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); 189e399441dSJames Smart } 190e399441dSJames Smart 191e399441dSJames Smart static inline struct nvme_fc_fcp_op * 192e399441dSJames Smart fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) 193e399441dSJames Smart { 194e399441dSJames Smart return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); 195e399441dSJames Smart } 196e399441dSJames Smart 197e399441dSJames Smart 198e399441dSJames Smart 199e399441dSJames Smart /* *************************** Globals **************************** */ 200e399441dSJames Smart 201e399441dSJames Smart 202e399441dSJames Smart static DEFINE_SPINLOCK(nvme_fc_lock); 203e399441dSJames Smart 204e399441dSJames Smart static LIST_HEAD(nvme_fc_lport_list); 205e399441dSJames Smart static DEFINE_IDA(nvme_fc_local_port_cnt); 206e399441dSJames Smart static DEFINE_IDA(nvme_fc_ctrl_cnt); 207e399441dSJames Smart 208e399441dSJames Smart 209e399441dSJames Smart 2105f568556SJames Smart /* 2115f568556SJames Smart * These items are short-term. They will eventually be moved into 2125f568556SJames Smart * a generic FC class. See comments in module init. 2135f568556SJames Smart */ 2145f568556SJames Smart static struct class *fc_class; 2155f568556SJames Smart static struct device *fc_udev_device; 2165f568556SJames Smart 217e399441dSJames Smart 218e399441dSJames Smart /* *********************** FC-NVME Port Management ************************ */ 219e399441dSJames Smart 220e399441dSJames Smart static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, 221e399441dSJames Smart struct nvme_fc_queue *, unsigned int); 222e399441dSJames Smart 2235533d424SJames Smart static void 2245533d424SJames Smart nvme_fc_free_lport(struct kref *ref) 2255533d424SJames Smart { 2265533d424SJames Smart struct nvme_fc_lport *lport = 2275533d424SJames Smart container_of(ref, struct nvme_fc_lport, ref); 2285533d424SJames Smart unsigned long flags; 2295533d424SJames Smart 2305533d424SJames Smart WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); 2315533d424SJames Smart WARN_ON(!list_empty(&lport->endp_list)); 2325533d424SJames Smart 2335533d424SJames Smart /* remove from transport list */ 2345533d424SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2355533d424SJames Smart list_del(&lport->port_list); 2365533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 2375533d424SJames Smart 2385533d424SJames Smart ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); 2395533d424SJames Smart ida_destroy(&lport->endp_cnt); 2405533d424SJames Smart 2415533d424SJames Smart put_device(lport->dev); 2425533d424SJames Smart 2435533d424SJames Smart kfree(lport); 2445533d424SJames Smart } 2455533d424SJames Smart 2465533d424SJames Smart static void 2475533d424SJames Smart nvme_fc_lport_put(struct nvme_fc_lport *lport) 2485533d424SJames Smart { 2495533d424SJames Smart kref_put(&lport->ref, nvme_fc_free_lport); 2505533d424SJames Smart } 2515533d424SJames Smart 2525533d424SJames Smart static int 2535533d424SJames Smart nvme_fc_lport_get(struct nvme_fc_lport *lport) 2545533d424SJames Smart { 2555533d424SJames Smart return kref_get_unless_zero(&lport->ref); 2565533d424SJames Smart } 2575533d424SJames Smart 2585533d424SJames Smart 2595533d424SJames Smart static struct nvme_fc_lport * 260c5760f30SJames Smart nvme_fc_attach_to_unreg_lport(struct nvme_fc_port_info *pinfo, 261c5760f30SJames Smart struct nvme_fc_port_template *ops, 262c5760f30SJames Smart struct device *dev) 2635533d424SJames Smart { 2645533d424SJames Smart struct nvme_fc_lport *lport; 2655533d424SJames Smart unsigned long flags; 2665533d424SJames Smart 2675533d424SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2685533d424SJames Smart 2695533d424SJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 2705533d424SJames Smart if (lport->localport.node_name != pinfo->node_name || 2715533d424SJames Smart lport->localport.port_name != pinfo->port_name) 2725533d424SJames Smart continue; 2735533d424SJames Smart 274c5760f30SJames Smart if (lport->dev != dev) { 275c5760f30SJames Smart lport = ERR_PTR(-EXDEV); 276c5760f30SJames Smart goto out_done; 277c5760f30SJames Smart } 278c5760f30SJames Smart 2795533d424SJames Smart if (lport->localport.port_state != FC_OBJSTATE_DELETED) { 2805533d424SJames Smart lport = ERR_PTR(-EEXIST); 2815533d424SJames Smart goto out_done; 2825533d424SJames Smart } 2835533d424SJames Smart 2845533d424SJames Smart if (!nvme_fc_lport_get(lport)) { 2855533d424SJames Smart /* 2865533d424SJames Smart * fails if ref cnt already 0. If so, 2875533d424SJames Smart * act as if lport already deleted 2885533d424SJames Smart */ 2895533d424SJames Smart lport = NULL; 2905533d424SJames Smart goto out_done; 2915533d424SJames Smart } 2925533d424SJames Smart 2935533d424SJames Smart /* resume the lport */ 2945533d424SJames Smart 295c5760f30SJames Smart lport->ops = ops; 2965533d424SJames Smart lport->localport.port_role = pinfo->port_role; 2975533d424SJames Smart lport->localport.port_id = pinfo->port_id; 2985533d424SJames Smart lport->localport.port_state = FC_OBJSTATE_ONLINE; 2995533d424SJames Smart 3005533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3015533d424SJames Smart 3025533d424SJames Smart return lport; 3035533d424SJames Smart } 3045533d424SJames Smart 3055533d424SJames Smart lport = NULL; 3065533d424SJames Smart 3075533d424SJames Smart out_done: 3085533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3095533d424SJames Smart 3105533d424SJames Smart return lport; 3115533d424SJames Smart } 312e399441dSJames Smart 313e399441dSJames Smart /** 314e399441dSJames Smart * nvme_fc_register_localport - transport entry point called by an 315e399441dSJames Smart * LLDD to register the existence of a NVME 316e399441dSJames Smart * host FC port. 317e399441dSJames Smart * @pinfo: pointer to information about the port to be registered 318e399441dSJames Smart * @template: LLDD entrypoints and operational parameters for the port 319e399441dSJames Smart * @dev: physical hardware device node port corresponds to. Will be 320e399441dSJames Smart * used for DMA mappings 321e399441dSJames Smart * @lport_p: pointer to a local port pointer. Upon success, the routine 322e399441dSJames Smart * will allocate a nvme_fc_local_port structure and place its 323e399441dSJames Smart * address in the local port pointer. Upon failure, local port 324e399441dSJames Smart * pointer will be set to 0. 325e399441dSJames Smart * 326e399441dSJames Smart * Returns: 327e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 328e399441dSJames Smart * (ex: -ENXIO) upon failure. 329e399441dSJames Smart */ 330e399441dSJames Smart int 331e399441dSJames Smart nvme_fc_register_localport(struct nvme_fc_port_info *pinfo, 332e399441dSJames Smart struct nvme_fc_port_template *template, 333e399441dSJames Smart struct device *dev, 334e399441dSJames Smart struct nvme_fc_local_port **portptr) 335e399441dSJames Smart { 336e399441dSJames Smart struct nvme_fc_lport *newrec; 337e399441dSJames Smart unsigned long flags; 338e399441dSJames Smart int ret, idx; 339e399441dSJames Smart 340e399441dSJames Smart if (!template->localport_delete || !template->remoteport_delete || 341e399441dSJames Smart !template->ls_req || !template->fcp_io || 342e399441dSJames Smart !template->ls_abort || !template->fcp_abort || 343e399441dSJames Smart !template->max_hw_queues || !template->max_sgl_segments || 344e399441dSJames Smart !template->max_dif_sgl_segments || !template->dma_boundary) { 345e399441dSJames Smart ret = -EINVAL; 346e399441dSJames Smart goto out_reghost_failed; 347e399441dSJames Smart } 348e399441dSJames Smart 3495533d424SJames Smart /* 3505533d424SJames Smart * look to see if there is already a localport that had been 3515533d424SJames Smart * deregistered and in the process of waiting for all the 3525533d424SJames Smart * references to fully be removed. If the references haven't 3535533d424SJames Smart * expired, we can simply re-enable the localport. Remoteports 3545533d424SJames Smart * and controller reconnections should resume naturally. 3555533d424SJames Smart */ 356c5760f30SJames Smart newrec = nvme_fc_attach_to_unreg_lport(pinfo, template, dev); 3575533d424SJames Smart 3585533d424SJames Smart /* found an lport, but something about its state is bad */ 3595533d424SJames Smart if (IS_ERR(newrec)) { 3605533d424SJames Smart ret = PTR_ERR(newrec); 3615533d424SJames Smart goto out_reghost_failed; 3625533d424SJames Smart 3635533d424SJames Smart /* found existing lport, which was resumed */ 3645533d424SJames Smart } else if (newrec) { 3655533d424SJames Smart *portptr = &newrec->localport; 3665533d424SJames Smart return 0; 3675533d424SJames Smart } 3685533d424SJames Smart 3695533d424SJames Smart /* nothing found - allocate a new localport struct */ 3705533d424SJames Smart 371e399441dSJames Smart newrec = kmalloc((sizeof(*newrec) + template->local_priv_sz), 372e399441dSJames Smart GFP_KERNEL); 373e399441dSJames Smart if (!newrec) { 374e399441dSJames Smart ret = -ENOMEM; 375e399441dSJames Smart goto out_reghost_failed; 376e399441dSJames Smart } 377e399441dSJames Smart 378e399441dSJames Smart idx = ida_simple_get(&nvme_fc_local_port_cnt, 0, 0, GFP_KERNEL); 379e399441dSJames Smart if (idx < 0) { 380e399441dSJames Smart ret = -ENOSPC; 381e399441dSJames Smart goto out_fail_kfree; 382e399441dSJames Smart } 383e399441dSJames Smart 384e399441dSJames Smart if (!get_device(dev) && dev) { 385e399441dSJames Smart ret = -ENODEV; 386e399441dSJames Smart goto out_ida_put; 387e399441dSJames Smart } 388e399441dSJames Smart 389e399441dSJames Smart INIT_LIST_HEAD(&newrec->port_list); 390e399441dSJames Smart INIT_LIST_HEAD(&newrec->endp_list); 391e399441dSJames Smart kref_init(&newrec->ref); 392158bfb88SJames Smart atomic_set(&newrec->act_rport_cnt, 0); 393e399441dSJames Smart newrec->ops = template; 394e399441dSJames Smart newrec->dev = dev; 395e399441dSJames Smart ida_init(&newrec->endp_cnt); 396e399441dSJames Smart newrec->localport.private = &newrec[1]; 397e399441dSJames Smart newrec->localport.node_name = pinfo->node_name; 398e399441dSJames Smart newrec->localport.port_name = pinfo->port_name; 399e399441dSJames Smart newrec->localport.port_role = pinfo->port_role; 400e399441dSJames Smart newrec->localport.port_id = pinfo->port_id; 401e399441dSJames Smart newrec->localport.port_state = FC_OBJSTATE_ONLINE; 402e399441dSJames Smart newrec->localport.port_num = idx; 403e399441dSJames Smart 404e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 405e399441dSJames Smart list_add_tail(&newrec->port_list, &nvme_fc_lport_list); 406e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 407e399441dSJames Smart 408e399441dSJames Smart if (dev) 409e399441dSJames Smart dma_set_seg_boundary(dev, template->dma_boundary); 410e399441dSJames Smart 411e399441dSJames Smart *portptr = &newrec->localport; 412e399441dSJames Smart return 0; 413e399441dSJames Smart 414e399441dSJames Smart out_ida_put: 415e399441dSJames Smart ida_simple_remove(&nvme_fc_local_port_cnt, idx); 416e399441dSJames Smart out_fail_kfree: 417e399441dSJames Smart kfree(newrec); 418e399441dSJames Smart out_reghost_failed: 419e399441dSJames Smart *portptr = NULL; 420e399441dSJames Smart 421e399441dSJames Smart return ret; 422e399441dSJames Smart } 423e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_register_localport); 424e399441dSJames Smart 425e399441dSJames Smart /** 426e399441dSJames Smart * nvme_fc_unregister_localport - transport entry point called by an 427e399441dSJames Smart * LLDD to deregister/remove a previously 428e399441dSJames Smart * registered a NVME host FC port. 429e399441dSJames Smart * @localport: pointer to the (registered) local port that is to be 430e399441dSJames Smart * deregistered. 431e399441dSJames Smart * 432e399441dSJames Smart * Returns: 433e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 434e399441dSJames Smart * (ex: -ENXIO) upon failure. 435e399441dSJames Smart */ 436e399441dSJames Smart int 437e399441dSJames Smart nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) 438e399441dSJames Smart { 439e399441dSJames Smart struct nvme_fc_lport *lport = localport_to_lport(portptr); 440e399441dSJames Smart unsigned long flags; 441e399441dSJames Smart 442e399441dSJames Smart if (!portptr) 443e399441dSJames Smart return -EINVAL; 444e399441dSJames Smart 445e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 446e399441dSJames Smart 447e399441dSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 448e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 449e399441dSJames Smart return -EINVAL; 450e399441dSJames Smart } 451e399441dSJames Smart portptr->port_state = FC_OBJSTATE_DELETED; 452e399441dSJames Smart 453e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 454e399441dSJames Smart 455158bfb88SJames Smart if (atomic_read(&lport->act_rport_cnt) == 0) 456158bfb88SJames Smart lport->ops->localport_delete(&lport->localport); 457158bfb88SJames Smart 458e399441dSJames Smart nvme_fc_lport_put(lport); 459e399441dSJames Smart 460e399441dSJames Smart return 0; 461e399441dSJames Smart } 462e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); 463e399441dSJames Smart 464eaefd5abSJames Smart /* 465eaefd5abSJames Smart * TRADDR strings, per FC-NVME are fixed format: 466eaefd5abSJames Smart * "nn-0x<16hexdigits>:pn-0x<16hexdigits>" - 43 characters 467eaefd5abSJames Smart * udev event will only differ by prefix of what field is 468eaefd5abSJames Smart * being specified: 469eaefd5abSJames Smart * "NVMEFC_HOST_TRADDR=" or "NVMEFC_TRADDR=" - 19 max characters 470eaefd5abSJames Smart * 19 + 43 + null_fudge = 64 characters 471eaefd5abSJames Smart */ 472eaefd5abSJames Smart #define FCNVME_TRADDR_LENGTH 64 473eaefd5abSJames Smart 474eaefd5abSJames Smart static void 475eaefd5abSJames Smart nvme_fc_signal_discovery_scan(struct nvme_fc_lport *lport, 476eaefd5abSJames Smart struct nvme_fc_rport *rport) 477eaefd5abSJames Smart { 478eaefd5abSJames Smart char hostaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_HOST_TRADDR=...*/ 479eaefd5abSJames Smart char tgtaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_TRADDR=...*/ 480eaefd5abSJames Smart char *envp[4] = { "FC_EVENT=nvmediscovery", hostaddr, tgtaddr, NULL }; 481eaefd5abSJames Smart 482eaefd5abSJames Smart if (!(rport->remoteport.port_role & FC_PORT_ROLE_NVME_DISCOVERY)) 483eaefd5abSJames Smart return; 484eaefd5abSJames Smart 485eaefd5abSJames Smart snprintf(hostaddr, sizeof(hostaddr), 486eaefd5abSJames Smart "NVMEFC_HOST_TRADDR=nn-0x%016llx:pn-0x%016llx", 487eaefd5abSJames Smart lport->localport.node_name, lport->localport.port_name); 488eaefd5abSJames Smart snprintf(tgtaddr, sizeof(tgtaddr), 489eaefd5abSJames Smart "NVMEFC_TRADDR=nn-0x%016llx:pn-0x%016llx", 490eaefd5abSJames Smart rport->remoteport.node_name, rport->remoteport.port_name); 491eaefd5abSJames Smart kobject_uevent_env(&fc_udev_device->kobj, KOBJ_CHANGE, envp); 492eaefd5abSJames Smart } 493eaefd5abSJames Smart 494469d0ef0SJames Smart static void 495469d0ef0SJames Smart nvme_fc_free_rport(struct kref *ref) 496469d0ef0SJames Smart { 497469d0ef0SJames Smart struct nvme_fc_rport *rport = 498469d0ef0SJames Smart container_of(ref, struct nvme_fc_rport, ref); 499469d0ef0SJames Smart struct nvme_fc_lport *lport = 500469d0ef0SJames Smart localport_to_lport(rport->remoteport.localport); 501469d0ef0SJames Smart unsigned long flags; 502469d0ef0SJames Smart 503469d0ef0SJames Smart WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); 504469d0ef0SJames Smart WARN_ON(!list_empty(&rport->ctrl_list)); 505469d0ef0SJames Smart 506469d0ef0SJames Smart /* remove from lport list */ 507469d0ef0SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 508469d0ef0SJames Smart list_del(&rport->endp_list); 509469d0ef0SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 510469d0ef0SJames Smart 511469d0ef0SJames Smart ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); 512469d0ef0SJames Smart 513469d0ef0SJames Smart kfree(rport); 514469d0ef0SJames Smart 515469d0ef0SJames Smart nvme_fc_lport_put(lport); 516469d0ef0SJames Smart } 517469d0ef0SJames Smart 518469d0ef0SJames Smart static void 519469d0ef0SJames Smart nvme_fc_rport_put(struct nvme_fc_rport *rport) 520469d0ef0SJames Smart { 521469d0ef0SJames Smart kref_put(&rport->ref, nvme_fc_free_rport); 522469d0ef0SJames Smart } 523469d0ef0SJames Smart 524469d0ef0SJames Smart static int 525469d0ef0SJames Smart nvme_fc_rport_get(struct nvme_fc_rport *rport) 526469d0ef0SJames Smart { 527469d0ef0SJames Smart return kref_get_unless_zero(&rport->ref); 528469d0ef0SJames Smart } 529469d0ef0SJames Smart 5302b632970SJames Smart static void 5312b632970SJames Smart nvme_fc_resume_controller(struct nvme_fc_ctrl *ctrl) 5322b632970SJames Smart { 5332b632970SJames Smart switch (ctrl->ctrl.state) { 5342b632970SJames Smart case NVME_CTRL_NEW: 5352b632970SJames Smart case NVME_CTRL_RECONNECTING: 5362b632970SJames Smart /* 5372b632970SJames Smart * As all reconnects were suppressed, schedule a 5382b632970SJames Smart * connect. 5392b632970SJames Smart */ 5402b632970SJames Smart dev_info(ctrl->ctrl.device, 5412b632970SJames Smart "NVME-FC{%d}: connectivity re-established. " 5422b632970SJames Smart "Attempting reconnect\n", ctrl->cnum); 5432b632970SJames Smart 5442b632970SJames Smart queue_delayed_work(nvme_wq, &ctrl->connect_work, 0); 5452b632970SJames Smart break; 5462b632970SJames Smart 5472b632970SJames Smart case NVME_CTRL_RESETTING: 5482b632970SJames Smart /* 5492b632970SJames Smart * Controller is already in the process of terminating the 5502b632970SJames Smart * association. No need to do anything further. The reconnect 5512b632970SJames Smart * step will naturally occur after the reset completes. 5522b632970SJames Smart */ 5532b632970SJames Smart break; 5542b632970SJames Smart 5552b632970SJames Smart default: 5562b632970SJames Smart /* no action to take - let it delete */ 5572b632970SJames Smart break; 5582b632970SJames Smart } 5592b632970SJames Smart } 5602b632970SJames Smart 5612b632970SJames Smart static struct nvme_fc_rport * 5622b632970SJames Smart nvme_fc_attach_to_suspended_rport(struct nvme_fc_lport *lport, 5632b632970SJames Smart struct nvme_fc_port_info *pinfo) 5642b632970SJames Smart { 5652b632970SJames Smart struct nvme_fc_rport *rport; 5662b632970SJames Smart struct nvme_fc_ctrl *ctrl; 5672b632970SJames Smart unsigned long flags; 5682b632970SJames Smart 5692b632970SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 5702b632970SJames Smart 5712b632970SJames Smart list_for_each_entry(rport, &lport->endp_list, endp_list) { 5722b632970SJames Smart if (rport->remoteport.node_name != pinfo->node_name || 5732b632970SJames Smart rport->remoteport.port_name != pinfo->port_name) 5742b632970SJames Smart continue; 5752b632970SJames Smart 5762b632970SJames Smart if (!nvme_fc_rport_get(rport)) { 5772b632970SJames Smart rport = ERR_PTR(-ENOLCK); 5782b632970SJames Smart goto out_done; 5792b632970SJames Smart } 5802b632970SJames Smart 5812b632970SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 5822b632970SJames Smart 5832b632970SJames Smart spin_lock_irqsave(&rport->lock, flags); 5842b632970SJames Smart 5852b632970SJames Smart /* has it been unregistered */ 5862b632970SJames Smart if (rport->remoteport.port_state != FC_OBJSTATE_DELETED) { 5872b632970SJames Smart /* means lldd called us twice */ 5882b632970SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 5892b632970SJames Smart nvme_fc_rport_put(rport); 5902b632970SJames Smart return ERR_PTR(-ESTALE); 5912b632970SJames Smart } 5922b632970SJames Smart 5932b632970SJames Smart rport->remoteport.port_state = FC_OBJSTATE_ONLINE; 5942b632970SJames Smart rport->dev_loss_end = 0; 5952b632970SJames Smart 5962b632970SJames Smart /* 5972b632970SJames Smart * kick off a reconnect attempt on all associations to the 5982b632970SJames Smart * remote port. A successful reconnects will resume i/o. 5992b632970SJames Smart */ 6002b632970SJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) 6012b632970SJames Smart nvme_fc_resume_controller(ctrl); 6022b632970SJames Smart 6032b632970SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 6042b632970SJames Smart 6052b632970SJames Smart return rport; 6062b632970SJames Smart } 6072b632970SJames Smart 6082b632970SJames Smart rport = NULL; 6092b632970SJames Smart 6102b632970SJames Smart out_done: 6112b632970SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 6122b632970SJames Smart 6132b632970SJames Smart return rport; 6142b632970SJames Smart } 6152b632970SJames Smart 6162b632970SJames Smart static inline void 6172b632970SJames Smart __nvme_fc_set_dev_loss_tmo(struct nvme_fc_rport *rport, 6182b632970SJames Smart struct nvme_fc_port_info *pinfo) 6192b632970SJames Smart { 6202b632970SJames Smart if (pinfo->dev_loss_tmo) 6212b632970SJames Smart rport->remoteport.dev_loss_tmo = pinfo->dev_loss_tmo; 6222b632970SJames Smart else 6232b632970SJames Smart rport->remoteport.dev_loss_tmo = NVME_FC_DEFAULT_DEV_LOSS_TMO; 6242b632970SJames Smart } 6252b632970SJames Smart 626e399441dSJames Smart /** 627e399441dSJames Smart * nvme_fc_register_remoteport - transport entry point called by an 628e399441dSJames Smart * LLDD to register the existence of a NVME 629e399441dSJames Smart * subsystem FC port on its fabric. 630e399441dSJames Smart * @localport: pointer to the (registered) local port that the remote 631e399441dSJames Smart * subsystem port is connected to. 632e399441dSJames Smart * @pinfo: pointer to information about the port to be registered 633e399441dSJames Smart * @rport_p: pointer to a remote port pointer. Upon success, the routine 634e399441dSJames Smart * will allocate a nvme_fc_remote_port structure and place its 635e399441dSJames Smart * address in the remote port pointer. Upon failure, remote port 636e399441dSJames Smart * pointer will be set to 0. 637e399441dSJames Smart * 638e399441dSJames Smart * Returns: 639e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 640e399441dSJames Smart * (ex: -ENXIO) upon failure. 641e399441dSJames Smart */ 642e399441dSJames Smart int 643e399441dSJames Smart nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, 644e399441dSJames Smart struct nvme_fc_port_info *pinfo, 645e399441dSJames Smart struct nvme_fc_remote_port **portptr) 646e399441dSJames Smart { 647e399441dSJames Smart struct nvme_fc_lport *lport = localport_to_lport(localport); 648e399441dSJames Smart struct nvme_fc_rport *newrec; 649e399441dSJames Smart unsigned long flags; 650e399441dSJames Smart int ret, idx; 651e399441dSJames Smart 6522b632970SJames Smart if (!nvme_fc_lport_get(lport)) { 6532b632970SJames Smart ret = -ESHUTDOWN; 6542b632970SJames Smart goto out_reghost_failed; 6552b632970SJames Smart } 6562b632970SJames Smart 6572b632970SJames Smart /* 6582b632970SJames Smart * look to see if there is already a remoteport that is waiting 6592b632970SJames Smart * for a reconnect (within dev_loss_tmo) with the same WWN's. 6602b632970SJames Smart * If so, transition to it and reconnect. 6612b632970SJames Smart */ 6622b632970SJames Smart newrec = nvme_fc_attach_to_suspended_rport(lport, pinfo); 6632b632970SJames Smart 6642b632970SJames Smart /* found an rport, but something about its state is bad */ 6652b632970SJames Smart if (IS_ERR(newrec)) { 6662b632970SJames Smart ret = PTR_ERR(newrec); 6672b632970SJames Smart goto out_lport_put; 6682b632970SJames Smart 6692b632970SJames Smart /* found existing rport, which was resumed */ 6702b632970SJames Smart } else if (newrec) { 6712b632970SJames Smart nvme_fc_lport_put(lport); 6722b632970SJames Smart __nvme_fc_set_dev_loss_tmo(newrec, pinfo); 6732b632970SJames Smart nvme_fc_signal_discovery_scan(lport, newrec); 6742b632970SJames Smart *portptr = &newrec->remoteport; 6752b632970SJames Smart return 0; 6762b632970SJames Smart } 6772b632970SJames Smart 6782b632970SJames Smart /* nothing found - allocate a new remoteport struct */ 6792b632970SJames Smart 680e399441dSJames Smart newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), 681e399441dSJames Smart GFP_KERNEL); 682e399441dSJames Smart if (!newrec) { 683e399441dSJames Smart ret = -ENOMEM; 6842b632970SJames Smart goto out_lport_put; 685e399441dSJames Smart } 686e399441dSJames Smart 687e399441dSJames Smart idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); 688e399441dSJames Smart if (idx < 0) { 689e399441dSJames Smart ret = -ENOSPC; 6902b632970SJames Smart goto out_kfree_rport; 691e399441dSJames Smart } 692e399441dSJames Smart 693e399441dSJames Smart INIT_LIST_HEAD(&newrec->endp_list); 694e399441dSJames Smart INIT_LIST_HEAD(&newrec->ctrl_list); 695c913a8b0SJames Smart INIT_LIST_HEAD(&newrec->ls_req_list); 696e399441dSJames Smart kref_init(&newrec->ref); 697158bfb88SJames Smart atomic_set(&newrec->act_ctrl_cnt, 0); 698e399441dSJames Smart spin_lock_init(&newrec->lock); 699e399441dSJames Smart newrec->remoteport.localport = &lport->localport; 700c913a8b0SJames Smart newrec->dev = lport->dev; 701c913a8b0SJames Smart newrec->lport = lport; 702e399441dSJames Smart newrec->remoteport.private = &newrec[1]; 703e399441dSJames Smart newrec->remoteport.port_role = pinfo->port_role; 704e399441dSJames Smart newrec->remoteport.node_name = pinfo->node_name; 705e399441dSJames Smart newrec->remoteport.port_name = pinfo->port_name; 706e399441dSJames Smart newrec->remoteport.port_id = pinfo->port_id; 707e399441dSJames Smart newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; 708e399441dSJames Smart newrec->remoteport.port_num = idx; 7092b632970SJames Smart __nvme_fc_set_dev_loss_tmo(newrec, pinfo); 710e399441dSJames Smart 711e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 712e399441dSJames Smart list_add_tail(&newrec->endp_list, &lport->endp_list); 713e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 714e399441dSJames Smart 715eaefd5abSJames Smart nvme_fc_signal_discovery_scan(lport, newrec); 716eaefd5abSJames Smart 717e399441dSJames Smart *portptr = &newrec->remoteport; 718e399441dSJames Smart return 0; 719e399441dSJames Smart 720e399441dSJames Smart out_kfree_rport: 721e399441dSJames Smart kfree(newrec); 7222b632970SJames Smart out_lport_put: 7232b632970SJames Smart nvme_fc_lport_put(lport); 724e399441dSJames Smart out_reghost_failed: 725e399441dSJames Smart *portptr = NULL; 726e399441dSJames Smart return ret; 727e399441dSJames Smart } 728e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); 729e399441dSJames Smart 7308d64daf7SJames Smart static int 7318d64daf7SJames Smart nvme_fc_abort_lsops(struct nvme_fc_rport *rport) 7328d64daf7SJames Smart { 7338d64daf7SJames Smart struct nvmefc_ls_req_op *lsop; 7348d64daf7SJames Smart unsigned long flags; 7358d64daf7SJames Smart 7368d64daf7SJames Smart restart: 7378d64daf7SJames Smart spin_lock_irqsave(&rport->lock, flags); 7388d64daf7SJames Smart 7398d64daf7SJames Smart list_for_each_entry(lsop, &rport->ls_req_list, lsreq_list) { 7408d64daf7SJames Smart if (!(lsop->flags & FCOP_FLAGS_TERMIO)) { 7418d64daf7SJames Smart lsop->flags |= FCOP_FLAGS_TERMIO; 7428d64daf7SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 7438d64daf7SJames Smart rport->lport->ops->ls_abort(&rport->lport->localport, 7448d64daf7SJames Smart &rport->remoteport, 7458d64daf7SJames Smart &lsop->ls_req); 7468d64daf7SJames Smart goto restart; 7478d64daf7SJames Smart } 7488d64daf7SJames Smart } 7498d64daf7SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 7508d64daf7SJames Smart 7518d64daf7SJames Smart return 0; 7528d64daf7SJames Smart } 7538d64daf7SJames Smart 7542b632970SJames Smart static void 7552b632970SJames Smart nvme_fc_ctrl_connectivity_loss(struct nvme_fc_ctrl *ctrl) 7562b632970SJames Smart { 7572b632970SJames Smart dev_info(ctrl->ctrl.device, 7582b632970SJames Smart "NVME-FC{%d}: controller connectivity lost. Awaiting " 7592b632970SJames Smart "Reconnect", ctrl->cnum); 7602b632970SJames Smart 7612b632970SJames Smart switch (ctrl->ctrl.state) { 7622b632970SJames Smart case NVME_CTRL_NEW: 7632b632970SJames Smart case NVME_CTRL_LIVE: 7642b632970SJames Smart /* 7652b632970SJames Smart * Schedule a controller reset. The reset will terminate the 7662b632970SJames Smart * association and schedule the reconnect timer. Reconnects 7672b632970SJames Smart * will be attempted until either the ctlr_loss_tmo 7682b632970SJames Smart * (max_retries * connect_delay) expires or the remoteport's 7692b632970SJames Smart * dev_loss_tmo expires. 7702b632970SJames Smart */ 7712b632970SJames Smart if (nvme_reset_ctrl(&ctrl->ctrl)) { 7722b632970SJames Smart dev_warn(ctrl->ctrl.device, 7732b632970SJames Smart "NVME-FC{%d}: Couldn't schedule reset. " 7742b632970SJames Smart "Deleting controller.\n", 7752b632970SJames Smart ctrl->cnum); 7762b632970SJames Smart nvme_delete_ctrl(&ctrl->ctrl); 7772b632970SJames Smart } 7782b632970SJames Smart break; 7792b632970SJames Smart 7802b632970SJames Smart case NVME_CTRL_RECONNECTING: 7812b632970SJames Smart /* 7822b632970SJames Smart * The association has already been terminated and the 7832b632970SJames Smart * controller is attempting reconnects. No need to do anything 7842b632970SJames Smart * futher. Reconnects will be attempted until either the 7852b632970SJames Smart * ctlr_loss_tmo (max_retries * connect_delay) expires or the 7862b632970SJames Smart * remoteport's dev_loss_tmo expires. 7872b632970SJames Smart */ 7882b632970SJames Smart break; 7892b632970SJames Smart 7902b632970SJames Smart case NVME_CTRL_RESETTING: 7912b632970SJames Smart /* 7922b632970SJames Smart * Controller is already in the process of terminating the 7932b632970SJames Smart * association. No need to do anything further. The reconnect 7942b632970SJames Smart * step will kick in naturally after the association is 7952b632970SJames Smart * terminated. 7962b632970SJames Smart */ 7972b632970SJames Smart break; 7982b632970SJames Smart 7992b632970SJames Smart case NVME_CTRL_DELETING: 8002b632970SJames Smart default: 8012b632970SJames Smart /* no action to take - let it delete */ 8022b632970SJames Smart break; 8032b632970SJames Smart } 8042b632970SJames Smart } 8052b632970SJames Smart 806e399441dSJames Smart /** 807e399441dSJames Smart * nvme_fc_unregister_remoteport - transport entry point called by an 808e399441dSJames Smart * LLDD to deregister/remove a previously 809e399441dSJames Smart * registered a NVME subsystem FC port. 810e399441dSJames Smart * @remoteport: pointer to the (registered) remote port that is to be 811e399441dSJames Smart * deregistered. 812e399441dSJames Smart * 813e399441dSJames Smart * Returns: 814e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 815e399441dSJames Smart * (ex: -ENXIO) upon failure. 816e399441dSJames Smart */ 817e399441dSJames Smart int 818e399441dSJames Smart nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) 819e399441dSJames Smart { 820e399441dSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(portptr); 821e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 822e399441dSJames Smart unsigned long flags; 823e399441dSJames Smart 824e399441dSJames Smart if (!portptr) 825e399441dSJames Smart return -EINVAL; 826e399441dSJames Smart 827e399441dSJames Smart spin_lock_irqsave(&rport->lock, flags); 828e399441dSJames Smart 829e399441dSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 830e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 831e399441dSJames Smart return -EINVAL; 832e399441dSJames Smart } 833e399441dSJames Smart portptr->port_state = FC_OBJSTATE_DELETED; 834e399441dSJames Smart 8352b632970SJames Smart rport->dev_loss_end = jiffies + (portptr->dev_loss_tmo * HZ); 8362b632970SJames Smart 8372b632970SJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { 8382b632970SJames Smart /* if dev_loss_tmo==0, dev loss is immediate */ 8392b632970SJames Smart if (!portptr->dev_loss_tmo) { 8402b632970SJames Smart dev_warn(ctrl->ctrl.device, 8412b632970SJames Smart "NVME-FC{%d}: controller connectivity lost. " 8422b632970SJames Smart "Deleting controller.\n", 8432b632970SJames Smart ctrl->cnum); 844c5017e85SChristoph Hellwig nvme_delete_ctrl(&ctrl->ctrl); 8452b632970SJames Smart } else 8462b632970SJames Smart nvme_fc_ctrl_connectivity_loss(ctrl); 8472b632970SJames Smart } 848e399441dSJames Smart 849e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 850e399441dSJames Smart 8518d64daf7SJames Smart nvme_fc_abort_lsops(rport); 8528d64daf7SJames Smart 853158bfb88SJames Smart if (atomic_read(&rport->act_ctrl_cnt) == 0) 854158bfb88SJames Smart rport->lport->ops->remoteport_delete(portptr); 855158bfb88SJames Smart 8562b632970SJames Smart /* 8572b632970SJames Smart * release the reference, which will allow, if all controllers 8582b632970SJames Smart * go away, which should only occur after dev_loss_tmo occurs, 8592b632970SJames Smart * for the rport to be torn down. 8602b632970SJames Smart */ 861e399441dSJames Smart nvme_fc_rport_put(rport); 8622b632970SJames Smart 863e399441dSJames Smart return 0; 864e399441dSJames Smart } 865e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); 866e399441dSJames Smart 867eaefd5abSJames Smart /** 868eaefd5abSJames Smart * nvme_fc_rescan_remoteport - transport entry point called by an 869eaefd5abSJames Smart * LLDD to request a nvme device rescan. 870eaefd5abSJames Smart * @remoteport: pointer to the (registered) remote port that is to be 871eaefd5abSJames Smart * rescanned. 872eaefd5abSJames Smart * 873eaefd5abSJames Smart * Returns: N/A 874eaefd5abSJames Smart */ 875eaefd5abSJames Smart void 876eaefd5abSJames Smart nvme_fc_rescan_remoteport(struct nvme_fc_remote_port *remoteport) 877eaefd5abSJames Smart { 878eaefd5abSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(remoteport); 879eaefd5abSJames Smart 880eaefd5abSJames Smart nvme_fc_signal_discovery_scan(rport->lport, rport); 881eaefd5abSJames Smart } 882eaefd5abSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_rescan_remoteport); 883eaefd5abSJames Smart 884ac7fe82bSJames Smart int 885ac7fe82bSJames Smart nvme_fc_set_remoteport_devloss(struct nvme_fc_remote_port *portptr, 886ac7fe82bSJames Smart u32 dev_loss_tmo) 887ac7fe82bSJames Smart { 888ac7fe82bSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(portptr); 889ac7fe82bSJames Smart unsigned long flags; 890ac7fe82bSJames Smart 891ac7fe82bSJames Smart spin_lock_irqsave(&rport->lock, flags); 892ac7fe82bSJames Smart 893ac7fe82bSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 894ac7fe82bSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 895ac7fe82bSJames Smart return -EINVAL; 896ac7fe82bSJames Smart } 897ac7fe82bSJames Smart 898ac7fe82bSJames Smart /* a dev_loss_tmo of 0 (immediate) is allowed to be set */ 899ac7fe82bSJames Smart rport->remoteport.dev_loss_tmo = dev_loss_tmo; 900ac7fe82bSJames Smart 901ac7fe82bSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 902ac7fe82bSJames Smart 903ac7fe82bSJames Smart return 0; 904ac7fe82bSJames Smart } 905ac7fe82bSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_set_remoteport_devloss); 906ac7fe82bSJames Smart 907e399441dSJames Smart 908e399441dSJames Smart /* *********************** FC-NVME DMA Handling **************************** */ 909e399441dSJames Smart 910e399441dSJames Smart /* 911e399441dSJames Smart * The fcloop device passes in a NULL device pointer. Real LLD's will 912e399441dSJames Smart * pass in a valid device pointer. If NULL is passed to the dma mapping 913e399441dSJames Smart * routines, depending on the platform, it may or may not succeed, and 914e399441dSJames Smart * may crash. 915e399441dSJames Smart * 916e399441dSJames Smart * As such: 917e399441dSJames Smart * Wrapper all the dma routines and check the dev pointer. 918e399441dSJames Smart * 919e399441dSJames Smart * If simple mappings (return just a dma address, we'll noop them, 920e399441dSJames Smart * returning a dma address of 0. 921e399441dSJames Smart * 922e399441dSJames Smart * On more complex mappings (dma_map_sg), a pseudo routine fills 923e399441dSJames Smart * in the scatter list, setting all dma addresses to 0. 924e399441dSJames Smart */ 925e399441dSJames Smart 926e399441dSJames Smart static inline dma_addr_t 927e399441dSJames Smart fc_dma_map_single(struct device *dev, void *ptr, size_t size, 928e399441dSJames Smart enum dma_data_direction dir) 929e399441dSJames Smart { 930e399441dSJames Smart return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; 931e399441dSJames Smart } 932e399441dSJames Smart 933e399441dSJames Smart static inline int 934e399441dSJames Smart fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 935e399441dSJames Smart { 936e399441dSJames Smart return dev ? dma_mapping_error(dev, dma_addr) : 0; 937e399441dSJames Smart } 938e399441dSJames Smart 939e399441dSJames Smart static inline void 940e399441dSJames Smart fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, 941e399441dSJames Smart enum dma_data_direction dir) 942e399441dSJames Smart { 943e399441dSJames Smart if (dev) 944e399441dSJames Smart dma_unmap_single(dev, addr, size, dir); 945e399441dSJames Smart } 946e399441dSJames Smart 947e399441dSJames Smart static inline void 948e399441dSJames Smart fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, 949e399441dSJames Smart enum dma_data_direction dir) 950e399441dSJames Smart { 951e399441dSJames Smart if (dev) 952e399441dSJames Smart dma_sync_single_for_cpu(dev, addr, size, dir); 953e399441dSJames Smart } 954e399441dSJames Smart 955e399441dSJames Smart static inline void 956e399441dSJames Smart fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, 957e399441dSJames Smart enum dma_data_direction dir) 958e399441dSJames Smart { 959e399441dSJames Smart if (dev) 960e399441dSJames Smart dma_sync_single_for_device(dev, addr, size, dir); 961e399441dSJames Smart } 962e399441dSJames Smart 963e399441dSJames Smart /* pseudo dma_map_sg call */ 964e399441dSJames Smart static int 965e399441dSJames Smart fc_map_sg(struct scatterlist *sg, int nents) 966e399441dSJames Smart { 967e399441dSJames Smart struct scatterlist *s; 968e399441dSJames Smart int i; 969e399441dSJames Smart 970e399441dSJames Smart WARN_ON(nents == 0 || sg[0].length == 0); 971e399441dSJames Smart 972e399441dSJames Smart for_each_sg(sg, s, nents, i) { 973e399441dSJames Smart s->dma_address = 0L; 974e399441dSJames Smart #ifdef CONFIG_NEED_SG_DMA_LENGTH 975e399441dSJames Smart s->dma_length = s->length; 976e399441dSJames Smart #endif 977e399441dSJames Smart } 978e399441dSJames Smart return nents; 979e399441dSJames Smart } 980e399441dSJames Smart 981e399441dSJames Smart static inline int 982e399441dSJames Smart fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 983e399441dSJames Smart enum dma_data_direction dir) 984e399441dSJames Smart { 985e399441dSJames Smart return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); 986e399441dSJames Smart } 987e399441dSJames Smart 988e399441dSJames Smart static inline void 989e399441dSJames Smart fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, 990e399441dSJames Smart enum dma_data_direction dir) 991e399441dSJames Smart { 992e399441dSJames Smart if (dev) 993e399441dSJames Smart dma_unmap_sg(dev, sg, nents, dir); 994e399441dSJames Smart } 995e399441dSJames Smart 996e399441dSJames Smart /* *********************** FC-NVME LS Handling **************************** */ 997e399441dSJames Smart 998e399441dSJames Smart static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); 999e399441dSJames Smart static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); 1000e399441dSJames Smart 1001e399441dSJames Smart 1002e399441dSJames Smart static void 1003c913a8b0SJames Smart __nvme_fc_finish_ls_req(struct nvmefc_ls_req_op *lsop) 1004e399441dSJames Smart { 1005c913a8b0SJames Smart struct nvme_fc_rport *rport = lsop->rport; 1006e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 1007e399441dSJames Smart unsigned long flags; 1008e399441dSJames Smart 1009c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 1010e399441dSJames Smart 1011e399441dSJames Smart if (!lsop->req_queued) { 1012c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 1013e399441dSJames Smart return; 1014e399441dSJames Smart } 1015e399441dSJames Smart 1016e399441dSJames Smart list_del(&lsop->lsreq_list); 1017e399441dSJames Smart 1018e399441dSJames Smart lsop->req_queued = false; 1019e399441dSJames Smart 1020c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 1021e399441dSJames Smart 1022c913a8b0SJames Smart fc_dma_unmap_single(rport->dev, lsreq->rqstdma, 1023e399441dSJames Smart (lsreq->rqstlen + lsreq->rsplen), 1024e399441dSJames Smart DMA_BIDIRECTIONAL); 1025e399441dSJames Smart 1026c913a8b0SJames Smart nvme_fc_rport_put(rport); 1027e399441dSJames Smart } 1028e399441dSJames Smart 1029e399441dSJames Smart static int 1030c913a8b0SJames Smart __nvme_fc_send_ls_req(struct nvme_fc_rport *rport, 1031e399441dSJames Smart struct nvmefc_ls_req_op *lsop, 1032e399441dSJames Smart void (*done)(struct nvmefc_ls_req *req, int status)) 1033e399441dSJames Smart { 1034e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 1035e399441dSJames Smart unsigned long flags; 1036c913a8b0SJames Smart int ret = 0; 1037e399441dSJames Smart 1038c913a8b0SJames Smart if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 1039c913a8b0SJames Smart return -ECONNREFUSED; 1040c913a8b0SJames Smart 1041c913a8b0SJames Smart if (!nvme_fc_rport_get(rport)) 1042e399441dSJames Smart return -ESHUTDOWN; 1043e399441dSJames Smart 1044e399441dSJames Smart lsreq->done = done; 1045c913a8b0SJames Smart lsop->rport = rport; 1046e399441dSJames Smart lsop->req_queued = false; 1047e399441dSJames Smart INIT_LIST_HEAD(&lsop->lsreq_list); 1048e399441dSJames Smart init_completion(&lsop->ls_done); 1049e399441dSJames Smart 1050c913a8b0SJames Smart lsreq->rqstdma = fc_dma_map_single(rport->dev, lsreq->rqstaddr, 1051e399441dSJames Smart lsreq->rqstlen + lsreq->rsplen, 1052e399441dSJames Smart DMA_BIDIRECTIONAL); 1053c913a8b0SJames Smart if (fc_dma_mapping_error(rport->dev, lsreq->rqstdma)) { 1054c913a8b0SJames Smart ret = -EFAULT; 1055c913a8b0SJames Smart goto out_putrport; 1056e399441dSJames Smart } 1057e399441dSJames Smart lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; 1058e399441dSJames Smart 1059c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 1060e399441dSJames Smart 1061c913a8b0SJames Smart list_add_tail(&lsop->lsreq_list, &rport->ls_req_list); 1062e399441dSJames Smart 1063e399441dSJames Smart lsop->req_queued = true; 1064e399441dSJames Smart 1065c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 1066e399441dSJames Smart 1067c913a8b0SJames Smart ret = rport->lport->ops->ls_req(&rport->lport->localport, 1068c913a8b0SJames Smart &rport->remoteport, lsreq); 1069e399441dSJames Smart if (ret) 1070c913a8b0SJames Smart goto out_unlink; 1071c913a8b0SJames Smart 1072c913a8b0SJames Smart return 0; 1073c913a8b0SJames Smart 1074c913a8b0SJames Smart out_unlink: 1075e399441dSJames Smart lsop->ls_error = ret; 1076c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 1077c913a8b0SJames Smart lsop->req_queued = false; 1078c913a8b0SJames Smart list_del(&lsop->lsreq_list); 1079c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 1080c913a8b0SJames Smart fc_dma_unmap_single(rport->dev, lsreq->rqstdma, 1081c913a8b0SJames Smart (lsreq->rqstlen + lsreq->rsplen), 1082c913a8b0SJames Smart DMA_BIDIRECTIONAL); 1083c913a8b0SJames Smart out_putrport: 1084c913a8b0SJames Smart nvme_fc_rport_put(rport); 1085e399441dSJames Smart 1086e399441dSJames Smart return ret; 1087e399441dSJames Smart } 1088e399441dSJames Smart 1089e399441dSJames Smart static void 1090e399441dSJames Smart nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) 1091e399441dSJames Smart { 1092e399441dSJames Smart struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); 1093e399441dSJames Smart 1094e399441dSJames Smart lsop->ls_error = status; 1095e399441dSJames Smart complete(&lsop->ls_done); 1096e399441dSJames Smart } 1097e399441dSJames Smart 1098e399441dSJames Smart static int 1099c913a8b0SJames Smart nvme_fc_send_ls_req(struct nvme_fc_rport *rport, struct nvmefc_ls_req_op *lsop) 1100e399441dSJames Smart { 1101e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 1102e399441dSJames Smart struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; 1103e399441dSJames Smart int ret; 1104e399441dSJames Smart 1105c913a8b0SJames Smart ret = __nvme_fc_send_ls_req(rport, lsop, nvme_fc_send_ls_req_done); 1106e399441dSJames Smart 1107c913a8b0SJames Smart if (!ret) { 1108e399441dSJames Smart /* 1109e399441dSJames Smart * No timeout/not interruptible as we need the struct 1110e399441dSJames Smart * to exist until the lldd calls us back. Thus mandate 1111e399441dSJames Smart * wait until driver calls back. lldd responsible for 1112e399441dSJames Smart * the timeout action 1113e399441dSJames Smart */ 1114e399441dSJames Smart wait_for_completion(&lsop->ls_done); 1115e399441dSJames Smart 1116c913a8b0SJames Smart __nvme_fc_finish_ls_req(lsop); 1117e399441dSJames Smart 1118c913a8b0SJames Smart ret = lsop->ls_error; 1119e399441dSJames Smart } 1120e399441dSJames Smart 1121c913a8b0SJames Smart if (ret) 1122c913a8b0SJames Smart return ret; 1123c913a8b0SJames Smart 1124e399441dSJames Smart /* ACC or RJT payload ? */ 1125e399441dSJames Smart if (rjt->w0.ls_cmd == FCNVME_LS_RJT) 1126e399441dSJames Smart return -ENXIO; 1127e399441dSJames Smart 1128e399441dSJames Smart return 0; 1129e399441dSJames Smart } 1130e399441dSJames Smart 1131c913a8b0SJames Smart static int 1132c913a8b0SJames Smart nvme_fc_send_ls_req_async(struct nvme_fc_rport *rport, 1133e399441dSJames Smart struct nvmefc_ls_req_op *lsop, 1134e399441dSJames Smart void (*done)(struct nvmefc_ls_req *req, int status)) 1135e399441dSJames Smart { 1136e399441dSJames Smart /* don't wait for completion */ 1137e399441dSJames Smart 1138c913a8b0SJames Smart return __nvme_fc_send_ls_req(rport, lsop, done); 1139e399441dSJames Smart } 1140e399441dSJames Smart 1141e399441dSJames Smart /* Validation Error indexes into the string table below */ 1142e399441dSJames Smart enum { 1143e399441dSJames Smart VERR_NO_ERROR = 0, 1144e399441dSJames Smart VERR_LSACC = 1, 1145e399441dSJames Smart VERR_LSDESC_RQST = 2, 1146e399441dSJames Smart VERR_LSDESC_RQST_LEN = 3, 1147e399441dSJames Smart VERR_ASSOC_ID = 4, 1148e399441dSJames Smart VERR_ASSOC_ID_LEN = 5, 1149e399441dSJames Smart VERR_CONN_ID = 6, 1150e399441dSJames Smart VERR_CONN_ID_LEN = 7, 1151e399441dSJames Smart VERR_CR_ASSOC = 8, 1152e399441dSJames Smart VERR_CR_ASSOC_ACC_LEN = 9, 1153e399441dSJames Smart VERR_CR_CONN = 10, 1154e399441dSJames Smart VERR_CR_CONN_ACC_LEN = 11, 1155e399441dSJames Smart VERR_DISCONN = 12, 1156e399441dSJames Smart VERR_DISCONN_ACC_LEN = 13, 1157e399441dSJames Smart }; 1158e399441dSJames Smart 1159e399441dSJames Smart static char *validation_errors[] = { 1160e399441dSJames Smart "OK", 1161e399441dSJames Smart "Not LS_ACC", 1162e399441dSJames Smart "Not LSDESC_RQST", 1163e399441dSJames Smart "Bad LSDESC_RQST Length", 1164e399441dSJames Smart "Not Association ID", 1165e399441dSJames Smart "Bad Association ID Length", 1166e399441dSJames Smart "Not Connection ID", 1167e399441dSJames Smart "Bad Connection ID Length", 1168e399441dSJames Smart "Not CR_ASSOC Rqst", 1169e399441dSJames Smart "Bad CR_ASSOC ACC Length", 1170e399441dSJames Smart "Not CR_CONN Rqst", 1171e399441dSJames Smart "Bad CR_CONN ACC Length", 1172e399441dSJames Smart "Not Disconnect Rqst", 1173e399441dSJames Smart "Bad Disconnect ACC Length", 1174e399441dSJames Smart }; 1175e399441dSJames Smart 1176e399441dSJames Smart static int 1177e399441dSJames Smart nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, 1178e399441dSJames Smart struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) 1179e399441dSJames Smart { 1180e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1181e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1182e399441dSJames Smart struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; 1183e399441dSJames Smart struct fcnvme_ls_cr_assoc_acc *assoc_acc; 1184e399441dSJames Smart int ret, fcret = 0; 1185e399441dSJames Smart 1186e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1187e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 1188e399441dSJames Smart sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL); 1189e399441dSJames Smart if (!lsop) { 1190e399441dSJames Smart ret = -ENOMEM; 1191e399441dSJames Smart goto out_no_memory; 1192e399441dSJames Smart } 1193e399441dSJames Smart lsreq = &lsop->ls_req; 1194e399441dSJames Smart 1195e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 1196e399441dSJames Smart assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *) 1197e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 1198e399441dSJames Smart assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; 1199e399441dSJames Smart 1200e399441dSJames Smart assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; 1201e399441dSJames Smart assoc_rqst->desc_list_len = 1202e399441dSJames Smart cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); 1203e399441dSJames Smart 1204e399441dSJames Smart assoc_rqst->assoc_cmd.desc_tag = 1205e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); 1206e399441dSJames Smart assoc_rqst->assoc_cmd.desc_len = 1207e399441dSJames Smart fcnvme_lsdesc_len( 1208e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); 1209e399441dSJames Smart 1210e399441dSJames Smart assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); 1211e399441dSJames Smart assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize); 1212e399441dSJames Smart /* Linux supports only Dynamic controllers */ 1213e399441dSJames Smart assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); 12148e412263SChristoph Hellwig uuid_copy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id); 1215e399441dSJames Smart strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, 1216e399441dSJames Smart min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); 1217e399441dSJames Smart strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, 1218e399441dSJames Smart min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); 1219e399441dSJames Smart 1220e399441dSJames Smart lsop->queue = queue; 1221e399441dSJames Smart lsreq->rqstaddr = assoc_rqst; 1222e399441dSJames Smart lsreq->rqstlen = sizeof(*assoc_rqst); 1223e399441dSJames Smart lsreq->rspaddr = assoc_acc; 1224e399441dSJames Smart lsreq->rsplen = sizeof(*assoc_acc); 1225e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 1226e399441dSJames Smart 1227c913a8b0SJames Smart ret = nvme_fc_send_ls_req(ctrl->rport, lsop); 1228e399441dSJames Smart if (ret) 1229e399441dSJames Smart goto out_free_buffer; 1230e399441dSJames Smart 1231e399441dSJames Smart /* process connect LS completion */ 1232e399441dSJames Smart 1233e399441dSJames Smart /* validate the ACC response */ 1234e399441dSJames Smart if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) 1235e399441dSJames Smart fcret = VERR_LSACC; 1236f77fc87cSJames Smart else if (assoc_acc->hdr.desc_list_len != 1237e399441dSJames Smart fcnvme_lsdesc_len( 1238e399441dSJames Smart sizeof(struct fcnvme_ls_cr_assoc_acc))) 1239e399441dSJames Smart fcret = VERR_CR_ASSOC_ACC_LEN; 1240f77fc87cSJames Smart else if (assoc_acc->hdr.rqst.desc_tag != 1241f77fc87cSJames Smart cpu_to_be32(FCNVME_LSDESC_RQST)) 1242e399441dSJames Smart fcret = VERR_LSDESC_RQST; 1243e399441dSJames Smart else if (assoc_acc->hdr.rqst.desc_len != 1244e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) 1245e399441dSJames Smart fcret = VERR_LSDESC_RQST_LEN; 1246e399441dSJames Smart else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) 1247e399441dSJames Smart fcret = VERR_CR_ASSOC; 1248e399441dSJames Smart else if (assoc_acc->associd.desc_tag != 1249e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) 1250e399441dSJames Smart fcret = VERR_ASSOC_ID; 1251e399441dSJames Smart else if (assoc_acc->associd.desc_len != 1252e399441dSJames Smart fcnvme_lsdesc_len( 1253e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id))) 1254e399441dSJames Smart fcret = VERR_ASSOC_ID_LEN; 1255e399441dSJames Smart else if (assoc_acc->connectid.desc_tag != 1256e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CONN_ID)) 1257e399441dSJames Smart fcret = VERR_CONN_ID; 1258e399441dSJames Smart else if (assoc_acc->connectid.desc_len != 1259e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) 1260e399441dSJames Smart fcret = VERR_CONN_ID_LEN; 1261e399441dSJames Smart 1262e399441dSJames Smart if (fcret) { 1263e399441dSJames Smart ret = -EBADF; 1264e399441dSJames Smart dev_err(ctrl->dev, 1265e399441dSJames Smart "q %d connect failed: %s\n", 1266e399441dSJames Smart queue->qnum, validation_errors[fcret]); 1267e399441dSJames Smart } else { 1268e399441dSJames Smart ctrl->association_id = 1269e399441dSJames Smart be64_to_cpu(assoc_acc->associd.association_id); 1270e399441dSJames Smart queue->connection_id = 1271e399441dSJames Smart be64_to_cpu(assoc_acc->connectid.connection_id); 1272e399441dSJames Smart set_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1273e399441dSJames Smart } 1274e399441dSJames Smart 1275e399441dSJames Smart out_free_buffer: 1276e399441dSJames Smart kfree(lsop); 1277e399441dSJames Smart out_no_memory: 1278e399441dSJames Smart if (ret) 1279e399441dSJames Smart dev_err(ctrl->dev, 1280e399441dSJames Smart "queue %d connect admin queue failed (%d).\n", 1281e399441dSJames Smart queue->qnum, ret); 1282e399441dSJames Smart return ret; 1283e399441dSJames Smart } 1284e399441dSJames Smart 1285e399441dSJames Smart static int 1286e399441dSJames Smart nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, 1287e399441dSJames Smart u16 qsize, u16 ersp_ratio) 1288e399441dSJames Smart { 1289e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1290e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1291e399441dSJames Smart struct fcnvme_ls_cr_conn_rqst *conn_rqst; 1292e399441dSJames Smart struct fcnvme_ls_cr_conn_acc *conn_acc; 1293e399441dSJames Smart int ret, fcret = 0; 1294e399441dSJames Smart 1295e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1296e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 1297e399441dSJames Smart sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL); 1298e399441dSJames Smart if (!lsop) { 1299e399441dSJames Smart ret = -ENOMEM; 1300e399441dSJames Smart goto out_no_memory; 1301e399441dSJames Smart } 1302e399441dSJames Smart lsreq = &lsop->ls_req; 1303e399441dSJames Smart 1304e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 1305e399441dSJames Smart conn_rqst = (struct fcnvme_ls_cr_conn_rqst *) 1306e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 1307e399441dSJames Smart conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; 1308e399441dSJames Smart 1309e399441dSJames Smart conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; 1310e399441dSJames Smart conn_rqst->desc_list_len = cpu_to_be32( 1311e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id) + 1312e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); 1313e399441dSJames Smart 1314e399441dSJames Smart conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); 1315e399441dSJames Smart conn_rqst->associd.desc_len = 1316e399441dSJames Smart fcnvme_lsdesc_len( 1317e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id)); 1318e399441dSJames Smart conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); 1319e399441dSJames Smart conn_rqst->connect_cmd.desc_tag = 1320e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); 1321e399441dSJames Smart conn_rqst->connect_cmd.desc_len = 1322e399441dSJames Smart fcnvme_lsdesc_len( 1323e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); 1324e399441dSJames Smart conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); 1325e399441dSJames Smart conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); 1326e399441dSJames Smart conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize); 1327e399441dSJames Smart 1328e399441dSJames Smart lsop->queue = queue; 1329e399441dSJames Smart lsreq->rqstaddr = conn_rqst; 1330e399441dSJames Smart lsreq->rqstlen = sizeof(*conn_rqst); 1331e399441dSJames Smart lsreq->rspaddr = conn_acc; 1332e399441dSJames Smart lsreq->rsplen = sizeof(*conn_acc); 1333e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 1334e399441dSJames Smart 1335c913a8b0SJames Smart ret = nvme_fc_send_ls_req(ctrl->rport, lsop); 1336e399441dSJames Smart if (ret) 1337e399441dSJames Smart goto out_free_buffer; 1338e399441dSJames Smart 1339e399441dSJames Smart /* process connect LS completion */ 1340e399441dSJames Smart 1341e399441dSJames Smart /* validate the ACC response */ 1342e399441dSJames Smart if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) 1343e399441dSJames Smart fcret = VERR_LSACC; 1344f77fc87cSJames Smart else if (conn_acc->hdr.desc_list_len != 1345e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) 1346e399441dSJames Smart fcret = VERR_CR_CONN_ACC_LEN; 1347f77fc87cSJames Smart else if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) 1348e399441dSJames Smart fcret = VERR_LSDESC_RQST; 1349e399441dSJames Smart else if (conn_acc->hdr.rqst.desc_len != 1350e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) 1351e399441dSJames Smart fcret = VERR_LSDESC_RQST_LEN; 1352e399441dSJames Smart else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) 1353e399441dSJames Smart fcret = VERR_CR_CONN; 1354e399441dSJames Smart else if (conn_acc->connectid.desc_tag != 1355e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CONN_ID)) 1356e399441dSJames Smart fcret = VERR_CONN_ID; 1357e399441dSJames Smart else if (conn_acc->connectid.desc_len != 1358e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) 1359e399441dSJames Smart fcret = VERR_CONN_ID_LEN; 1360e399441dSJames Smart 1361e399441dSJames Smart if (fcret) { 1362e399441dSJames Smart ret = -EBADF; 1363e399441dSJames Smart dev_err(ctrl->dev, 1364e399441dSJames Smart "q %d connect failed: %s\n", 1365e399441dSJames Smart queue->qnum, validation_errors[fcret]); 1366e399441dSJames Smart } else { 1367e399441dSJames Smart queue->connection_id = 1368e399441dSJames Smart be64_to_cpu(conn_acc->connectid.connection_id); 1369e399441dSJames Smart set_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1370e399441dSJames Smart } 1371e399441dSJames Smart 1372e399441dSJames Smart out_free_buffer: 1373e399441dSJames Smart kfree(lsop); 1374e399441dSJames Smart out_no_memory: 1375e399441dSJames Smart if (ret) 1376e399441dSJames Smart dev_err(ctrl->dev, 1377e399441dSJames Smart "queue %d connect command failed (%d).\n", 1378e399441dSJames Smart queue->qnum, ret); 1379e399441dSJames Smart return ret; 1380e399441dSJames Smart } 1381e399441dSJames Smart 1382e399441dSJames Smart static void 1383e399441dSJames Smart nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) 1384e399441dSJames Smart { 1385e399441dSJames Smart struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); 1386e399441dSJames Smart 1387c913a8b0SJames Smart __nvme_fc_finish_ls_req(lsop); 1388e399441dSJames Smart 1389e399441dSJames Smart /* fc-nvme iniator doesn't care about success or failure of cmd */ 1390e399441dSJames Smart 1391e399441dSJames Smart kfree(lsop); 1392e399441dSJames Smart } 1393e399441dSJames Smart 1394e399441dSJames Smart /* 1395e399441dSJames Smart * This routine sends a FC-NVME LS to disconnect (aka terminate) 1396e399441dSJames Smart * the FC-NVME Association. Terminating the association also 1397e399441dSJames Smart * terminates the FC-NVME connections (per queue, both admin and io 1398e399441dSJames Smart * queues) that are part of the association. E.g. things are torn 1399e399441dSJames Smart * down, and the related FC-NVME Association ID and Connection IDs 1400e399441dSJames Smart * become invalid. 1401e399441dSJames Smart * 1402e399441dSJames Smart * The behavior of the fc-nvme initiator is such that it's 1403e399441dSJames Smart * understanding of the association and connections will implicitly 1404e399441dSJames Smart * be torn down. The action is implicit as it may be due to a loss of 1405e399441dSJames Smart * connectivity with the fc-nvme target, so you may never get a 1406e399441dSJames Smart * response even if you tried. As such, the action of this routine 1407e399441dSJames Smart * is to asynchronously send the LS, ignore any results of the LS, and 1408e399441dSJames Smart * continue on with terminating the association. If the fc-nvme target 1409e399441dSJames Smart * is present and receives the LS, it too can tear down. 1410e399441dSJames Smart */ 1411e399441dSJames Smart static void 1412e399441dSJames Smart nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) 1413e399441dSJames Smart { 1414e399441dSJames Smart struct fcnvme_ls_disconnect_rqst *discon_rqst; 1415e399441dSJames Smart struct fcnvme_ls_disconnect_acc *discon_acc; 1416e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1417e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1418c913a8b0SJames Smart int ret; 1419e399441dSJames Smart 1420e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1421e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 1422e399441dSJames Smart sizeof(*discon_rqst) + sizeof(*discon_acc)), 1423e399441dSJames Smart GFP_KERNEL); 1424e399441dSJames Smart if (!lsop) 1425e399441dSJames Smart /* couldn't sent it... too bad */ 1426e399441dSJames Smart return; 1427e399441dSJames Smart 1428e399441dSJames Smart lsreq = &lsop->ls_req; 1429e399441dSJames Smart 1430e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 1431e399441dSJames Smart discon_rqst = (struct fcnvme_ls_disconnect_rqst *) 1432e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 1433e399441dSJames Smart discon_acc = (struct fcnvme_ls_disconnect_acc *)&discon_rqst[1]; 1434e399441dSJames Smart 1435e399441dSJames Smart discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT; 1436e399441dSJames Smart discon_rqst->desc_list_len = cpu_to_be32( 1437e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id) + 1438e399441dSJames Smart sizeof(struct fcnvme_lsdesc_disconn_cmd)); 1439e399441dSJames Smart 1440e399441dSJames Smart discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); 1441e399441dSJames Smart discon_rqst->associd.desc_len = 1442e399441dSJames Smart fcnvme_lsdesc_len( 1443e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id)); 1444e399441dSJames Smart 1445e399441dSJames Smart discon_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); 1446e399441dSJames Smart 1447e399441dSJames Smart discon_rqst->discon_cmd.desc_tag = cpu_to_be32( 1448e399441dSJames Smart FCNVME_LSDESC_DISCONN_CMD); 1449e399441dSJames Smart discon_rqst->discon_cmd.desc_len = 1450e399441dSJames Smart fcnvme_lsdesc_len( 1451e399441dSJames Smart sizeof(struct fcnvme_lsdesc_disconn_cmd)); 1452e399441dSJames Smart discon_rqst->discon_cmd.scope = FCNVME_DISCONN_ASSOCIATION; 1453e399441dSJames Smart discon_rqst->discon_cmd.id = cpu_to_be64(ctrl->association_id); 1454e399441dSJames Smart 1455e399441dSJames Smart lsreq->rqstaddr = discon_rqst; 1456e399441dSJames Smart lsreq->rqstlen = sizeof(*discon_rqst); 1457e399441dSJames Smart lsreq->rspaddr = discon_acc; 1458e399441dSJames Smart lsreq->rsplen = sizeof(*discon_acc); 1459e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 1460e399441dSJames Smart 1461c913a8b0SJames Smart ret = nvme_fc_send_ls_req_async(ctrl->rport, lsop, 1462c913a8b0SJames Smart nvme_fc_disconnect_assoc_done); 1463c913a8b0SJames Smart if (ret) 1464c913a8b0SJames Smart kfree(lsop); 1465e399441dSJames Smart 1466e399441dSJames Smart /* only meaningful part to terminating the association */ 1467e399441dSJames Smart ctrl->association_id = 0; 1468e399441dSJames Smart } 1469e399441dSJames Smart 1470e399441dSJames Smart 1471e399441dSJames Smart /* *********************** NVME Ctrl Routines **************************** */ 1472e399441dSJames Smart 147378a7ac26SJames Smart static void __nvme_fc_final_op_cleanup(struct request *rq); 1474f874d5d0SJames Smart static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg); 1475e399441dSJames Smart 1476e399441dSJames Smart static int 1477e399441dSJames Smart nvme_fc_reinit_request(void *data, struct request *rq) 1478e399441dSJames Smart { 1479e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1480e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 1481e399441dSJames Smart 1482e399441dSJames Smart memset(cmdiu, 0, sizeof(*cmdiu)); 1483e399441dSJames Smart cmdiu->scsi_id = NVME_CMD_SCSI_ID; 1484e399441dSJames Smart cmdiu->fc_id = NVME_CMD_FC_ID; 1485e399441dSJames Smart cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); 1486e399441dSJames Smart memset(&op->rsp_iu, 0, sizeof(op->rsp_iu)); 1487e399441dSJames Smart 1488e399441dSJames Smart return 0; 1489e399441dSJames Smart } 1490e399441dSJames Smart 1491e399441dSJames Smart static void 1492e399441dSJames Smart __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, 1493e399441dSJames Smart struct nvme_fc_fcp_op *op) 1494e399441dSJames Smart { 1495e399441dSJames Smart fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, 1496e399441dSJames Smart sizeof(op->rsp_iu), DMA_FROM_DEVICE); 1497e399441dSJames Smart fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, 1498e399441dSJames Smart sizeof(op->cmd_iu), DMA_TO_DEVICE); 1499e399441dSJames Smart 1500e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_UNINIT); 1501e399441dSJames Smart } 1502e399441dSJames Smart 1503e399441dSJames Smart static void 1504d6296d39SChristoph Hellwig nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq, 1505d6296d39SChristoph Hellwig unsigned int hctx_idx) 1506e399441dSJames Smart { 1507e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1508e399441dSJames Smart 1509d6296d39SChristoph Hellwig return __nvme_fc_exit_request(set->driver_data, op); 1510e399441dSJames Smart } 1511e399441dSJames Smart 151278a7ac26SJames Smart static int 151378a7ac26SJames Smart __nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) 151478a7ac26SJames Smart { 151578a7ac26SJames Smart int state; 151678a7ac26SJames Smart 151778a7ac26SJames Smart state = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); 151878a7ac26SJames Smart if (state != FCPOP_STATE_ACTIVE) { 151978a7ac26SJames Smart atomic_set(&op->state, state); 152078a7ac26SJames Smart return -ECANCELED; 152178a7ac26SJames Smart } 152278a7ac26SJames Smart 152378a7ac26SJames Smart ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, 152478a7ac26SJames Smart &ctrl->rport->remoteport, 152578a7ac26SJames Smart op->queue->lldd_handle, 152678a7ac26SJames Smart &op->fcp_req); 152778a7ac26SJames Smart 152878a7ac26SJames Smart return 0; 152978a7ac26SJames Smart } 153078a7ac26SJames Smart 1531e399441dSJames Smart static void 153278a7ac26SJames Smart nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl) 1533e399441dSJames Smart { 1534e399441dSJames Smart struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; 153578a7ac26SJames Smart unsigned long flags; 153678a7ac26SJames Smart int i, ret; 1537e399441dSJames Smart 153838dabe21SKeith Busch for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { 153978a7ac26SJames Smart if (atomic_read(&aen_op->state) != FCPOP_STATE_ACTIVE) 1540e399441dSJames Smart continue; 154178a7ac26SJames Smart 154278a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 154361bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 154461bff8efSJames Smart ctrl->iocnt++; 154578a7ac26SJames Smart aen_op->flags |= FCOP_FLAGS_TERMIO; 154661bff8efSJames Smart } 154778a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 154878a7ac26SJames Smart 154978a7ac26SJames Smart ret = __nvme_fc_abort_op(ctrl, aen_op); 155078a7ac26SJames Smart if (ret) { 155178a7ac26SJames Smart /* 155278a7ac26SJames Smart * if __nvme_fc_abort_op failed the io wasn't 155378a7ac26SJames Smart * active. Thus this call path is running in 155478a7ac26SJames Smart * parallel to the io complete. Treat as non-error. 155578a7ac26SJames Smart */ 155678a7ac26SJames Smart 155778a7ac26SJames Smart /* back out the flags/counters */ 155878a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 155961bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 156061bff8efSJames Smart ctrl->iocnt--; 156178a7ac26SJames Smart aen_op->flags &= ~FCOP_FLAGS_TERMIO; 156278a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 156378a7ac26SJames Smart return; 1564e399441dSJames Smart } 1565e399441dSJames Smart } 156678a7ac26SJames Smart } 156778a7ac26SJames Smart 156878a7ac26SJames Smart static inline int 156978a7ac26SJames Smart __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl, 157078a7ac26SJames Smart struct nvme_fc_fcp_op *op) 157178a7ac26SJames Smart { 157278a7ac26SJames Smart unsigned long flags; 157378a7ac26SJames Smart bool complete_rq = false; 157478a7ac26SJames Smart 157578a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 157661bff8efSJames Smart if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { 157736715cf4SJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 157836715cf4SJames Smart if (!--ctrl->iocnt) 157936715cf4SJames Smart wake_up(&ctrl->ioabort_wait); 158036715cf4SJames Smart } 158161bff8efSJames Smart } 158278a7ac26SJames Smart if (op->flags & FCOP_FLAGS_RELEASED) 158378a7ac26SJames Smart complete_rq = true; 158478a7ac26SJames Smart else 158578a7ac26SJames Smart op->flags |= FCOP_FLAGS_COMPLETE; 158678a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 158778a7ac26SJames Smart 158878a7ac26SJames Smart return complete_rq; 158978a7ac26SJames Smart } 1590e399441dSJames Smart 1591baee29acSChristoph Hellwig static void 1592e399441dSJames Smart nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) 1593e399441dSJames Smart { 1594e399441dSJames Smart struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); 1595e399441dSJames Smart struct request *rq = op->rq; 1596e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 1597e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 1598e399441dSJames Smart struct nvme_fc_queue *queue = op->queue; 1599e399441dSJames Smart struct nvme_completion *cqe = &op->rsp_iu.cqe; 1600458f280dSJames Smart struct nvme_command *sqe = &op->cmd_iu.sqe; 1601d663b69fSChristoph Hellwig __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1); 160227fa9bc5SChristoph Hellwig union nvme_result result; 16030a02e39fSJames Smart bool terminate_assoc = true; 1604e399441dSJames Smart 1605e399441dSJames Smart /* 1606e399441dSJames Smart * WARNING: 1607e399441dSJames Smart * The current linux implementation of a nvme controller 1608e399441dSJames Smart * allocates a single tag set for all io queues and sizes 1609e399441dSJames Smart * the io queues to fully hold all possible tags. Thus, the 1610e399441dSJames Smart * implementation does not reference or care about the sqhd 1611e399441dSJames Smart * value as it never needs to use the sqhd/sqtail pointers 1612e399441dSJames Smart * for submission pacing. 1613e399441dSJames Smart * 1614e399441dSJames Smart * This affects the FC-NVME implementation in two ways: 1615e399441dSJames Smart * 1) As the value doesn't matter, we don't need to waste 1616e399441dSJames Smart * cycles extracting it from ERSPs and stamping it in the 1617e399441dSJames Smart * cases where the transport fabricates CQEs on successful 1618e399441dSJames Smart * completions. 1619e399441dSJames Smart * 2) The FC-NVME implementation requires that delivery of 1620e399441dSJames Smart * ERSP completions are to go back to the nvme layer in order 1621e399441dSJames Smart * relative to the rsn, such that the sqhd value will always 1622e399441dSJames Smart * be "in order" for the nvme layer. As the nvme layer in 1623e399441dSJames Smart * linux doesn't care about sqhd, there's no need to return 1624e399441dSJames Smart * them in order. 1625e399441dSJames Smart * 1626e399441dSJames Smart * Additionally: 1627e399441dSJames Smart * As the core nvme layer in linux currently does not look at 1628e399441dSJames Smart * every field in the cqe - in cases where the FC transport must 1629e399441dSJames Smart * fabricate a CQE, the following fields will not be set as they 1630e399441dSJames Smart * are not referenced: 1631e399441dSJames Smart * cqe.sqid, cqe.sqhd, cqe.command_id 1632f874d5d0SJames Smart * 1633f874d5d0SJames Smart * Failure or error of an individual i/o, in a transport 1634f874d5d0SJames Smart * detected fashion unrelated to the nvme completion status, 1635f874d5d0SJames Smart * potentially cause the initiator and target sides to get out 1636f874d5d0SJames Smart * of sync on SQ head/tail (aka outstanding io count allowed). 1637f874d5d0SJames Smart * Per FC-NVME spec, failure of an individual command requires 1638f874d5d0SJames Smart * the connection to be terminated, which in turn requires the 1639f874d5d0SJames Smart * association to be terminated. 1640e399441dSJames Smart */ 1641e399441dSJames Smart 1642e399441dSJames Smart fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, 1643e399441dSJames Smart sizeof(op->rsp_iu), DMA_FROM_DEVICE); 1644e399441dSJames Smart 16450a02e39fSJames Smart if (atomic_read(&op->state) == FCPOP_STATE_ABORTED || 16460a02e39fSJames Smart op->flags & FCOP_FLAGS_TERMIO) 16470a02e39fSJames Smart status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); 164862eeacb0SJames Smart else if (freq->status) 164956b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1650e399441dSJames Smart 1651e399441dSJames Smart /* 1652e399441dSJames Smart * For the linux implementation, if we have an unsuccesful 1653e399441dSJames Smart * status, they blk-mq layer can typically be called with the 1654e399441dSJames Smart * non-zero status and the content of the cqe isn't important. 1655e399441dSJames Smart */ 1656e399441dSJames Smart if (status) 1657e399441dSJames Smart goto done; 1658e399441dSJames Smart 1659e399441dSJames Smart /* 1660e399441dSJames Smart * command completed successfully relative to the wire 1661e399441dSJames Smart * protocol. However, validate anything received and 1662e399441dSJames Smart * extract the status and result from the cqe (create it 1663e399441dSJames Smart * where necessary). 1664e399441dSJames Smart */ 1665e399441dSJames Smart 1666e399441dSJames Smart switch (freq->rcv_rsplen) { 1667e399441dSJames Smart 1668e399441dSJames Smart case 0: 1669e399441dSJames Smart case NVME_FC_SIZEOF_ZEROS_RSP: 1670e399441dSJames Smart /* 1671e399441dSJames Smart * No response payload or 12 bytes of payload (which 1672e399441dSJames Smart * should all be zeros) are considered successful and 1673e399441dSJames Smart * no payload in the CQE by the transport. 1674e399441dSJames Smart */ 1675e399441dSJames Smart if (freq->transferred_length != 1676e399441dSJames Smart be32_to_cpu(op->cmd_iu.data_len)) { 167756b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1678e399441dSJames Smart goto done; 1679e399441dSJames Smart } 168027fa9bc5SChristoph Hellwig result.u64 = 0; 1681e399441dSJames Smart break; 1682e399441dSJames Smart 1683e399441dSJames Smart case sizeof(struct nvme_fc_ersp_iu): 1684e399441dSJames Smart /* 1685e399441dSJames Smart * The ERSP IU contains a full completion with CQE. 1686e399441dSJames Smart * Validate ERSP IU and look at cqe. 1687e399441dSJames Smart */ 1688e399441dSJames Smart if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != 1689e399441dSJames Smart (freq->rcv_rsplen / 4) || 1690e399441dSJames Smart be32_to_cpu(op->rsp_iu.xfrd_len) != 1691e399441dSJames Smart freq->transferred_length || 1692726a1080SJames Smart op->rsp_iu.status_code || 1693458f280dSJames Smart sqe->common.command_id != cqe->command_id)) { 169456b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1695e399441dSJames Smart goto done; 1696e399441dSJames Smart } 169727fa9bc5SChristoph Hellwig result = cqe->result; 1698d663b69fSChristoph Hellwig status = cqe->status; 1699e399441dSJames Smart break; 1700e399441dSJames Smart 1701e399441dSJames Smart default: 170256b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1703e399441dSJames Smart goto done; 1704e399441dSJames Smart } 1705e399441dSJames Smart 1706f874d5d0SJames Smart terminate_assoc = false; 1707f874d5d0SJames Smart 1708e399441dSJames Smart done: 170978a7ac26SJames Smart if (op->flags & FCOP_FLAGS_AEN) { 171027fa9bc5SChristoph Hellwig nvme_complete_async_event(&queue->ctrl->ctrl, status, &result); 17110a02e39fSJames Smart __nvme_fc_fcpop_chk_teardowns(ctrl, op); 171278a7ac26SJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 171378a7ac26SJames Smart op->flags = FCOP_FLAGS_AEN; /* clear other flags */ 1714e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 1715f874d5d0SJames Smart goto check_error; 1716e399441dSJames Smart } 1717e399441dSJames Smart 17180a02e39fSJames Smart /* 17190a02e39fSJames Smart * Force failures of commands if we're killing the controller 17200a02e39fSJames Smart * or have an error on a command used to create an new association 17210a02e39fSJames Smart */ 17220a02e39fSJames Smart if (status && 17230a02e39fSJames Smart (blk_queue_dying(rq->q) || 17240a02e39fSJames Smart ctrl->ctrl.state == NVME_CTRL_NEW || 17250a02e39fSJames Smart ctrl->ctrl.state == NVME_CTRL_RECONNECTING)) 1726e392e1f1SJames Smart status |= cpu_to_le16(NVME_SC_DNR << 1); 17270a02e39fSJames Smart 17280a02e39fSJames Smart if (__nvme_fc_fcpop_chk_teardowns(ctrl, op)) 172978a7ac26SJames Smart __nvme_fc_final_op_cleanup(rq); 17300a02e39fSJames Smart else 17310a02e39fSJames Smart nvme_end_request(rq, status, result); 1732f874d5d0SJames Smart 1733f874d5d0SJames Smart check_error: 1734f874d5d0SJames Smart if (terminate_assoc) 1735f874d5d0SJames Smart nvme_fc_error_recovery(ctrl, "transport detected io error"); 1736e399441dSJames Smart } 1737e399441dSJames Smart 1738e399441dSJames Smart static int 1739e399441dSJames Smart __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, 1740e399441dSJames Smart struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, 1741e399441dSJames Smart struct request *rq, u32 rqno) 1742e399441dSJames Smart { 1743e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 1744e399441dSJames Smart int ret = 0; 1745e399441dSJames Smart 1746e399441dSJames Smart memset(op, 0, sizeof(*op)); 1747e399441dSJames Smart op->fcp_req.cmdaddr = &op->cmd_iu; 1748e399441dSJames Smart op->fcp_req.cmdlen = sizeof(op->cmd_iu); 1749e399441dSJames Smart op->fcp_req.rspaddr = &op->rsp_iu; 1750e399441dSJames Smart op->fcp_req.rsplen = sizeof(op->rsp_iu); 1751e399441dSJames Smart op->fcp_req.done = nvme_fc_fcpio_done; 1752e399441dSJames Smart op->fcp_req.first_sgl = (struct scatterlist *)&op[1]; 1753e399441dSJames Smart op->fcp_req.private = &op->fcp_req.first_sgl[SG_CHUNK_SIZE]; 1754e399441dSJames Smart op->ctrl = ctrl; 1755e399441dSJames Smart op->queue = queue; 1756e399441dSJames Smart op->rq = rq; 1757e399441dSJames Smart op->rqno = rqno; 1758e399441dSJames Smart 1759e399441dSJames Smart cmdiu->scsi_id = NVME_CMD_SCSI_ID; 1760e399441dSJames Smart cmdiu->fc_id = NVME_CMD_FC_ID; 1761e399441dSJames Smart cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); 1762e399441dSJames Smart 1763e399441dSJames Smart op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, 1764e399441dSJames Smart &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); 1765e399441dSJames Smart if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { 1766e399441dSJames Smart dev_err(ctrl->dev, 1767e399441dSJames Smart "FCP Op failed - cmdiu dma mapping failed.\n"); 1768e399441dSJames Smart ret = EFAULT; 1769e399441dSJames Smart goto out_on_error; 1770e399441dSJames Smart } 1771e399441dSJames Smart 1772e399441dSJames Smart op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, 1773e399441dSJames Smart &op->rsp_iu, sizeof(op->rsp_iu), 1774e399441dSJames Smart DMA_FROM_DEVICE); 1775e399441dSJames Smart if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { 1776e399441dSJames Smart dev_err(ctrl->dev, 1777e399441dSJames Smart "FCP Op failed - rspiu dma mapping failed.\n"); 1778e399441dSJames Smart ret = EFAULT; 1779e399441dSJames Smart } 1780e399441dSJames Smart 1781e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 1782e399441dSJames Smart out_on_error: 1783e399441dSJames Smart return ret; 1784e399441dSJames Smart } 1785e399441dSJames Smart 1786e399441dSJames Smart static int 1787d6296d39SChristoph Hellwig nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, 1788d6296d39SChristoph Hellwig unsigned int hctx_idx, unsigned int numa_node) 1789e399441dSJames Smart { 1790d6296d39SChristoph Hellwig struct nvme_fc_ctrl *ctrl = set->driver_data; 1791e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 179276f983cbSChristoph Hellwig int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; 179376f983cbSChristoph Hellwig struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; 1794e399441dSJames Smart 1795e399441dSJames Smart return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++); 1796e399441dSJames Smart } 1797e399441dSJames Smart 1798e399441dSJames Smart static int 1799e399441dSJames Smart nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) 1800e399441dSJames Smart { 1801e399441dSJames Smart struct nvme_fc_fcp_op *aen_op; 1802e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu; 1803e399441dSJames Smart struct nvme_command *sqe; 180461bff8efSJames Smart void *private; 1805e399441dSJames Smart int i, ret; 1806e399441dSJames Smart 1807e399441dSJames Smart aen_op = ctrl->aen_ops; 180838dabe21SKeith Busch for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { 180961bff8efSJames Smart private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz, 181061bff8efSJames Smart GFP_KERNEL); 181161bff8efSJames Smart if (!private) 181261bff8efSJames Smart return -ENOMEM; 181361bff8efSJames Smart 1814e399441dSJames Smart cmdiu = &aen_op->cmd_iu; 1815e399441dSJames Smart sqe = &cmdiu->sqe; 1816e399441dSJames Smart ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], 1817e399441dSJames Smart aen_op, (struct request *)NULL, 181838dabe21SKeith Busch (NVME_AQ_BLK_MQ_DEPTH + i)); 181961bff8efSJames Smart if (ret) { 182061bff8efSJames Smart kfree(private); 1821e399441dSJames Smart return ret; 182261bff8efSJames Smart } 1823e399441dSJames Smart 182478a7ac26SJames Smart aen_op->flags = FCOP_FLAGS_AEN; 182561bff8efSJames Smart aen_op->fcp_req.first_sgl = NULL; /* no sg list */ 182661bff8efSJames Smart aen_op->fcp_req.private = private; 182778a7ac26SJames Smart 1828e399441dSJames Smart memset(sqe, 0, sizeof(*sqe)); 1829e399441dSJames Smart sqe->common.opcode = nvme_admin_async_event; 183078a7ac26SJames Smart /* Note: core layer may overwrite the sqe.command_id value */ 183138dabe21SKeith Busch sqe->common.command_id = NVME_AQ_BLK_MQ_DEPTH + i; 1832e399441dSJames Smart } 1833e399441dSJames Smart return 0; 1834e399441dSJames Smart } 1835e399441dSJames Smart 183661bff8efSJames Smart static void 183761bff8efSJames Smart nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl) 183861bff8efSJames Smart { 183961bff8efSJames Smart struct nvme_fc_fcp_op *aen_op; 184061bff8efSJames Smart int i; 184161bff8efSJames Smart 184261bff8efSJames Smart aen_op = ctrl->aen_ops; 184338dabe21SKeith Busch for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) { 184461bff8efSJames Smart if (!aen_op->fcp_req.private) 184561bff8efSJames Smart continue; 184661bff8efSJames Smart 184761bff8efSJames Smart __nvme_fc_exit_request(ctrl, aen_op); 184861bff8efSJames Smart 184961bff8efSJames Smart kfree(aen_op->fcp_req.private); 185061bff8efSJames Smart aen_op->fcp_req.private = NULL; 185161bff8efSJames Smart } 185261bff8efSJames Smart } 1853e399441dSJames Smart 1854e399441dSJames Smart static inline void 1855e399441dSJames Smart __nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, 1856e399441dSJames Smart unsigned int qidx) 1857e399441dSJames Smart { 1858e399441dSJames Smart struct nvme_fc_queue *queue = &ctrl->queues[qidx]; 1859e399441dSJames Smart 1860e399441dSJames Smart hctx->driver_data = queue; 1861e399441dSJames Smart queue->hctx = hctx; 1862e399441dSJames Smart } 1863e399441dSJames Smart 1864e399441dSJames Smart static int 1865e399441dSJames Smart nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 1866e399441dSJames Smart unsigned int hctx_idx) 1867e399441dSJames Smart { 1868e399441dSJames Smart struct nvme_fc_ctrl *ctrl = data; 1869e399441dSJames Smart 1870e399441dSJames Smart __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); 1871e399441dSJames Smart 1872e399441dSJames Smart return 0; 1873e399441dSJames Smart } 1874e399441dSJames Smart 1875e399441dSJames Smart static int 1876e399441dSJames Smart nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, 1877e399441dSJames Smart unsigned int hctx_idx) 1878e399441dSJames Smart { 1879e399441dSJames Smart struct nvme_fc_ctrl *ctrl = data; 1880e399441dSJames Smart 1881e399441dSJames Smart __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); 1882e399441dSJames Smart 1883e399441dSJames Smart return 0; 1884e399441dSJames Smart } 1885e399441dSJames Smart 1886e399441dSJames Smart static void 188708e15075SKeith Busch nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx) 1888e399441dSJames Smart { 1889e399441dSJames Smart struct nvme_fc_queue *queue; 1890e399441dSJames Smart 1891e399441dSJames Smart queue = &ctrl->queues[idx]; 1892e399441dSJames Smart memset(queue, 0, sizeof(*queue)); 1893e399441dSJames Smart queue->ctrl = ctrl; 1894e399441dSJames Smart queue->qnum = idx; 1895e399441dSJames Smart atomic_set(&queue->csn, 1); 1896e399441dSJames Smart queue->dev = ctrl->dev; 1897e399441dSJames Smart 1898e399441dSJames Smart if (idx > 0) 1899e399441dSJames Smart queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; 1900e399441dSJames Smart else 1901e399441dSJames Smart queue->cmnd_capsule_len = sizeof(struct nvme_command); 1902e399441dSJames Smart 1903e399441dSJames Smart /* 1904e399441dSJames Smart * Considered whether we should allocate buffers for all SQEs 1905e399441dSJames Smart * and CQEs and dma map them - mapping their respective entries 1906e399441dSJames Smart * into the request structures (kernel vm addr and dma address) 1907e399441dSJames Smart * thus the driver could use the buffers/mappings directly. 1908e399441dSJames Smart * It only makes sense if the LLDD would use them for its 1909e399441dSJames Smart * messaging api. It's very unlikely most adapter api's would use 1910e399441dSJames Smart * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload 1911e399441dSJames Smart * structures were used instead. 1912e399441dSJames Smart */ 1913e399441dSJames Smart } 1914e399441dSJames Smart 1915e399441dSJames Smart /* 1916e399441dSJames Smart * This routine terminates a queue at the transport level. 1917e399441dSJames Smart * The transport has already ensured that all outstanding ios on 1918e399441dSJames Smart * the queue have been terminated. 1919e399441dSJames Smart * The transport will send a Disconnect LS request to terminate 1920e399441dSJames Smart * the queue's connection. Termination of the admin queue will also 1921e399441dSJames Smart * terminate the association at the target. 1922e399441dSJames Smart */ 1923e399441dSJames Smart static void 1924e399441dSJames Smart nvme_fc_free_queue(struct nvme_fc_queue *queue) 1925e399441dSJames Smart { 1926e399441dSJames Smart if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) 1927e399441dSJames Smart return; 1928e399441dSJames Smart 19299e0ed16aSSagi Grimberg clear_bit(NVME_FC_Q_LIVE, &queue->flags); 1930e399441dSJames Smart /* 1931e399441dSJames Smart * Current implementation never disconnects a single queue. 1932e399441dSJames Smart * It always terminates a whole association. So there is never 1933e399441dSJames Smart * a disconnect(queue) LS sent to the target. 1934e399441dSJames Smart */ 1935e399441dSJames Smart 1936e399441dSJames Smart queue->connection_id = 0; 1937e399441dSJames Smart } 1938e399441dSJames Smart 1939e399441dSJames Smart static void 1940e399441dSJames Smart __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, 1941e399441dSJames Smart struct nvme_fc_queue *queue, unsigned int qidx) 1942e399441dSJames Smart { 1943e399441dSJames Smart if (ctrl->lport->ops->delete_queue) 1944e399441dSJames Smart ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, 1945e399441dSJames Smart queue->lldd_handle); 1946e399441dSJames Smart queue->lldd_handle = NULL; 1947e399441dSJames Smart } 1948e399441dSJames Smart 1949e399441dSJames Smart static void 1950e399441dSJames Smart nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) 1951e399441dSJames Smart { 1952e399441dSJames Smart int i; 1953e399441dSJames Smart 1954d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) 1955e399441dSJames Smart nvme_fc_free_queue(&ctrl->queues[i]); 1956e399441dSJames Smart } 1957e399441dSJames Smart 1958e399441dSJames Smart static int 1959e399441dSJames Smart __nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, 1960e399441dSJames Smart struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) 1961e399441dSJames Smart { 1962e399441dSJames Smart int ret = 0; 1963e399441dSJames Smart 1964e399441dSJames Smart queue->lldd_handle = NULL; 1965e399441dSJames Smart if (ctrl->lport->ops->create_queue) 1966e399441dSJames Smart ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, 1967e399441dSJames Smart qidx, qsize, &queue->lldd_handle); 1968e399441dSJames Smart 1969e399441dSJames Smart return ret; 1970e399441dSJames Smart } 1971e399441dSJames Smart 1972e399441dSJames Smart static void 1973e399441dSJames Smart nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) 1974e399441dSJames Smart { 1975d858e5f0SSagi Grimberg struct nvme_fc_queue *queue = &ctrl->queues[ctrl->ctrl.queue_count - 1]; 1976e399441dSJames Smart int i; 1977e399441dSJames Smart 1978d858e5f0SSagi Grimberg for (i = ctrl->ctrl.queue_count - 1; i >= 1; i--, queue--) 1979e399441dSJames Smart __nvme_fc_delete_hw_queue(ctrl, queue, i); 1980e399441dSJames Smart } 1981e399441dSJames Smart 1982e399441dSJames Smart static int 1983e399441dSJames Smart nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) 1984e399441dSJames Smart { 1985e399441dSJames Smart struct nvme_fc_queue *queue = &ctrl->queues[1]; 198617a1ec08SJohannes Thumshirn int i, ret; 1987e399441dSJames Smart 1988d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++, queue++) { 1989e399441dSJames Smart ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); 199017a1ec08SJohannes Thumshirn if (ret) 199117a1ec08SJohannes Thumshirn goto delete_queues; 1992e399441dSJames Smart } 1993e399441dSJames Smart 1994e399441dSJames Smart return 0; 199517a1ec08SJohannes Thumshirn 199617a1ec08SJohannes Thumshirn delete_queues: 199717a1ec08SJohannes Thumshirn for (; i >= 0; i--) 199817a1ec08SJohannes Thumshirn __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[i], i); 199917a1ec08SJohannes Thumshirn return ret; 2000e399441dSJames Smart } 2001e399441dSJames Smart 2002e399441dSJames Smart static int 2003e399441dSJames Smart nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) 2004e399441dSJames Smart { 2005e399441dSJames Smart int i, ret = 0; 2006e399441dSJames Smart 2007d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) { 2008e399441dSJames Smart ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, 2009e399441dSJames Smart (qsize / 5)); 2010e399441dSJames Smart if (ret) 2011e399441dSJames Smart break; 2012e399441dSJames Smart ret = nvmf_connect_io_queue(&ctrl->ctrl, i); 2013e399441dSJames Smart if (ret) 2014e399441dSJames Smart break; 20159e0ed16aSSagi Grimberg 20169e0ed16aSSagi Grimberg set_bit(NVME_FC_Q_LIVE, &ctrl->queues[i].flags); 2017e399441dSJames Smart } 2018e399441dSJames Smart 2019e399441dSJames Smart return ret; 2020e399441dSJames Smart } 2021e399441dSJames Smart 2022e399441dSJames Smart static void 2023e399441dSJames Smart nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) 2024e399441dSJames Smart { 2025e399441dSJames Smart int i; 2026e399441dSJames Smart 2027d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) 202808e15075SKeith Busch nvme_fc_init_queue(ctrl, i); 2029e399441dSJames Smart } 2030e399441dSJames Smart 2031e399441dSJames Smart static void 2032e399441dSJames Smart nvme_fc_ctrl_free(struct kref *ref) 2033e399441dSJames Smart { 2034e399441dSJames Smart struct nvme_fc_ctrl *ctrl = 2035e399441dSJames Smart container_of(ref, struct nvme_fc_ctrl, ref); 2036e399441dSJames Smart unsigned long flags; 2037e399441dSJames Smart 203861bff8efSJames Smart if (ctrl->ctrl.tagset) { 203961bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.connect_q); 204061bff8efSJames Smart blk_mq_free_tag_set(&ctrl->tag_set); 204161bff8efSJames Smart } 204261bff8efSJames Smart 2043e399441dSJames Smart /* remove from rport list */ 2044e399441dSJames Smart spin_lock_irqsave(&ctrl->rport->lock, flags); 2045e399441dSJames Smart list_del(&ctrl->ctrl_list); 2046e399441dSJames Smart spin_unlock_irqrestore(&ctrl->rport->lock, flags); 204761bff8efSJames Smart 2048f9c5af5fSSagi Grimberg blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 204961bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.admin_q); 205061bff8efSJames Smart blk_mq_free_tag_set(&ctrl->admin_tag_set); 205161bff8efSJames Smart 205261bff8efSJames Smart kfree(ctrl->queues); 2053e399441dSJames Smart 2054e399441dSJames Smart put_device(ctrl->dev); 2055e399441dSJames Smart nvme_fc_rport_put(ctrl->rport); 2056e399441dSJames Smart 2057e399441dSJames Smart ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); 2058de41447aSEwan D. Milne if (ctrl->ctrl.opts) 2059e399441dSJames Smart nvmf_free_options(ctrl->ctrl.opts); 2060e399441dSJames Smart kfree(ctrl); 2061e399441dSJames Smart } 2062e399441dSJames Smart 2063e399441dSJames Smart static void 2064e399441dSJames Smart nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) 2065e399441dSJames Smart { 2066e399441dSJames Smart kref_put(&ctrl->ref, nvme_fc_ctrl_free); 2067e399441dSJames Smart } 2068e399441dSJames Smart 2069e399441dSJames Smart static int 2070e399441dSJames Smart nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) 2071e399441dSJames Smart { 2072e399441dSJames Smart return kref_get_unless_zero(&ctrl->ref); 2073e399441dSJames Smart } 2074e399441dSJames Smart 2075e399441dSJames Smart /* 2076e399441dSJames Smart * All accesses from nvme core layer done - can now free the 2077e399441dSJames Smart * controller. Called after last nvme_put_ctrl() call 2078e399441dSJames Smart */ 2079e399441dSJames Smart static void 208061bff8efSJames Smart nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl) 2081e399441dSJames Smart { 2082e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 2083e399441dSJames Smart 2084e399441dSJames Smart WARN_ON(nctrl != &ctrl->ctrl); 2085e399441dSJames Smart 2086e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2087e399441dSJames Smart } 2088e399441dSJames Smart 208961bff8efSJames Smart static void 209061bff8efSJames Smart nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) 209161bff8efSJames Smart { 209269fa9646SJames Smart /* only proceed if in LIVE state - e.g. on first error */ 209369fa9646SJames Smart if (ctrl->ctrl.state != NVME_CTRL_LIVE) 209469fa9646SJames Smart return; 209569fa9646SJames Smart 209661bff8efSJames Smart dev_warn(ctrl->ctrl.device, 209761bff8efSJames Smart "NVME-FC{%d}: transport association error detected: %s\n", 209861bff8efSJames Smart ctrl->cnum, errmsg); 2099589ff775SJames Smart dev_warn(ctrl->ctrl.device, 210061bff8efSJames Smart "NVME-FC{%d}: resetting controller\n", ctrl->cnum); 210161bff8efSJames Smart 2102d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&ctrl->ctrl); 210361bff8efSJames Smart } 210461bff8efSJames Smart 2105baee29acSChristoph Hellwig static enum blk_eh_timer_return 2106e399441dSJames Smart nvme_fc_timeout(struct request *rq, bool reserved) 2107e399441dSJames Smart { 2108e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2109e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 2110e399441dSJames Smart int ret; 2111e399441dSJames Smart 2112134aedc9SJames Smart if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE || 2113134aedc9SJames Smart atomic_read(&op->state) == FCPOP_STATE_ABORTED) 2114e399441dSJames Smart return BLK_EH_RESET_TIMER; 2115e399441dSJames Smart 2116e399441dSJames Smart ret = __nvme_fc_abort_op(ctrl, op); 2117e399441dSJames Smart if (ret) 2118134aedc9SJames Smart /* io wasn't active to abort */ 2119134aedc9SJames Smart return BLK_EH_NOT_HANDLED; 2120e399441dSJames Smart 2121e399441dSJames Smart /* 212261bff8efSJames Smart * we can't individually ABTS an io without affecting the queue, 212361bff8efSJames Smart * thus killing the queue, adn thus the association. 212461bff8efSJames Smart * So resolve by performing a controller reset, which will stop 212561bff8efSJames Smart * the host/io stack, terminate the association on the link, 212661bff8efSJames Smart * and recreate an association on the link. 2127e399441dSJames Smart */ 212861bff8efSJames Smart nvme_fc_error_recovery(ctrl, "io timeout error"); 2129e399441dSJames Smart 2130134aedc9SJames Smart /* 2131134aedc9SJames Smart * the io abort has been initiated. Have the reset timer 2132134aedc9SJames Smart * restarted and the abort completion will complete the io 2133134aedc9SJames Smart * shortly. Avoids a synchronous wait while the abort finishes. 2134134aedc9SJames Smart */ 2135134aedc9SJames Smart return BLK_EH_RESET_TIMER; 2136e399441dSJames Smart } 2137e399441dSJames Smart 2138e399441dSJames Smart static int 2139e399441dSJames Smart nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, 2140e399441dSJames Smart struct nvme_fc_fcp_op *op) 2141e399441dSJames Smart { 2142e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 2143e399441dSJames Smart enum dma_data_direction dir; 2144e399441dSJames Smart int ret; 2145e399441dSJames Smart 2146e399441dSJames Smart freq->sg_cnt = 0; 2147e399441dSJames Smart 2148b131c61dSChristoph Hellwig if (!blk_rq_payload_bytes(rq)) 2149e399441dSJames Smart return 0; 2150e399441dSJames Smart 2151e399441dSJames Smart freq->sg_table.sgl = freq->first_sgl; 215219e420bbSChristoph Hellwig ret = sg_alloc_table_chained(&freq->sg_table, 215319e420bbSChristoph Hellwig blk_rq_nr_phys_segments(rq), freq->sg_table.sgl); 2154e399441dSJames Smart if (ret) 2155e399441dSJames Smart return -ENOMEM; 2156e399441dSJames Smart 2157e399441dSJames Smart op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); 215819e420bbSChristoph Hellwig WARN_ON(op->nents > blk_rq_nr_phys_segments(rq)); 2159e399441dSJames Smart dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 2160e399441dSJames Smart freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, 2161e399441dSJames Smart op->nents, dir); 2162e399441dSJames Smart if (unlikely(freq->sg_cnt <= 0)) { 2163e399441dSJames Smart sg_free_table_chained(&freq->sg_table, true); 2164e399441dSJames Smart freq->sg_cnt = 0; 2165e399441dSJames Smart return -EFAULT; 2166e399441dSJames Smart } 2167e399441dSJames Smart 2168e399441dSJames Smart /* 2169e399441dSJames Smart * TODO: blk_integrity_rq(rq) for DIF 2170e399441dSJames Smart */ 2171e399441dSJames Smart return 0; 2172e399441dSJames Smart } 2173e399441dSJames Smart 2174e399441dSJames Smart static void 2175e399441dSJames Smart nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, 2176e399441dSJames Smart struct nvme_fc_fcp_op *op) 2177e399441dSJames Smart { 2178e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 2179e399441dSJames Smart 2180e399441dSJames Smart if (!freq->sg_cnt) 2181e399441dSJames Smart return; 2182e399441dSJames Smart 2183e399441dSJames Smart fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, 2184e399441dSJames Smart ((rq_data_dir(rq) == WRITE) ? 2185e399441dSJames Smart DMA_TO_DEVICE : DMA_FROM_DEVICE)); 2186e399441dSJames Smart 2187e399441dSJames Smart nvme_cleanup_cmd(rq); 2188e399441dSJames Smart 2189e399441dSJames Smart sg_free_table_chained(&freq->sg_table, true); 2190e399441dSJames Smart 2191e399441dSJames Smart freq->sg_cnt = 0; 2192e399441dSJames Smart } 2193e399441dSJames Smart 2194e399441dSJames Smart /* 2195e399441dSJames Smart * In FC, the queue is a logical thing. At transport connect, the target 2196e399441dSJames Smart * creates its "queue" and returns a handle that is to be given to the 2197e399441dSJames Smart * target whenever it posts something to the corresponding SQ. When an 2198e399441dSJames Smart * SQE is sent on a SQ, FC effectively considers the SQE, or rather the 2199e399441dSJames Smart * command contained within the SQE, an io, and assigns a FC exchange 2200e399441dSJames Smart * to it. The SQE and the associated SQ handle are sent in the initial 2201e399441dSJames Smart * CMD IU sents on the exchange. All transfers relative to the io occur 2202e399441dSJames Smart * as part of the exchange. The CQE is the last thing for the io, 2203e399441dSJames Smart * which is transferred (explicitly or implicitly) with the RSP IU 2204e399441dSJames Smart * sent on the exchange. After the CQE is received, the FC exchange is 2205e399441dSJames Smart * terminaed and the Exchange may be used on a different io. 2206e399441dSJames Smart * 2207e399441dSJames Smart * The transport to LLDD api has the transport making a request for a 2208e399441dSJames Smart * new fcp io request to the LLDD. The LLDD then allocates a FC exchange 2209e399441dSJames Smart * resource and transfers the command. The LLDD will then process all 2210e399441dSJames Smart * steps to complete the io. Upon completion, the transport done routine 2211e399441dSJames Smart * is called. 2212e399441dSJames Smart * 2213e399441dSJames Smart * So - while the operation is outstanding to the LLDD, there is a link 2214e399441dSJames Smart * level FC exchange resource that is also outstanding. This must be 2215e399441dSJames Smart * considered in all cleanup operations. 2216e399441dSJames Smart */ 2217fc17b653SChristoph Hellwig static blk_status_t 2218e399441dSJames Smart nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, 2219e399441dSJames Smart struct nvme_fc_fcp_op *op, u32 data_len, 2220e399441dSJames Smart enum nvmefc_fcp_datadir io_dir) 2221e399441dSJames Smart { 2222e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 2223e399441dSJames Smart struct nvme_command *sqe = &cmdiu->sqe; 2224e399441dSJames Smart u32 csn; 2225e399441dSJames Smart int ret; 2226e399441dSJames Smart 222761bff8efSJames Smart /* 222861bff8efSJames Smart * before attempting to send the io, check to see if we believe 222961bff8efSJames Smart * the target device is present 223061bff8efSJames Smart */ 223161bff8efSJames Smart if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 223286ff7c2aSMing Lei return BLK_STS_RESOURCE; 223361bff8efSJames Smart 2234e399441dSJames Smart if (!nvme_fc_ctrl_get(ctrl)) 2235fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2236e399441dSJames Smart 2237e399441dSJames Smart /* format the FC-NVME CMD IU and fcp_req */ 2238e399441dSJames Smart cmdiu->connection_id = cpu_to_be64(queue->connection_id); 2239e399441dSJames Smart csn = atomic_inc_return(&queue->csn); 2240e399441dSJames Smart cmdiu->csn = cpu_to_be32(csn); 2241e399441dSJames Smart cmdiu->data_len = cpu_to_be32(data_len); 2242e399441dSJames Smart switch (io_dir) { 2243e399441dSJames Smart case NVMEFC_FCP_WRITE: 2244e399441dSJames Smart cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; 2245e399441dSJames Smart break; 2246e399441dSJames Smart case NVMEFC_FCP_READ: 2247e399441dSJames Smart cmdiu->flags = FCNVME_CMD_FLAGS_READ; 2248e399441dSJames Smart break; 2249e399441dSJames Smart case NVMEFC_FCP_NODATA: 2250e399441dSJames Smart cmdiu->flags = 0; 2251e399441dSJames Smart break; 2252e399441dSJames Smart } 2253e399441dSJames Smart op->fcp_req.payload_length = data_len; 2254e399441dSJames Smart op->fcp_req.io_dir = io_dir; 2255e399441dSJames Smart op->fcp_req.transferred_length = 0; 2256e399441dSJames Smart op->fcp_req.rcv_rsplen = 0; 225762eeacb0SJames Smart op->fcp_req.status = NVME_SC_SUCCESS; 2258e399441dSJames Smart op->fcp_req.sqid = cpu_to_le16(queue->qnum); 2259e399441dSJames Smart 2260e399441dSJames Smart /* 2261e399441dSJames Smart * validate per fabric rules, set fields mandated by fabric spec 2262e399441dSJames Smart * as well as those by FC-NVME spec. 2263e399441dSJames Smart */ 2264e399441dSJames Smart WARN_ON_ONCE(sqe->common.metadata); 2265e399441dSJames Smart sqe->common.flags |= NVME_CMD_SGL_METABUF; 2266e399441dSJames Smart 2267e399441dSJames Smart /* 2268d9d34c0bSJames Smart * format SQE DPTR field per FC-NVME rules: 2269d9d34c0bSJames Smart * type=0x5 Transport SGL Data Block Descriptor 2270d9d34c0bSJames Smart * subtype=0xA Transport-specific value 2271d9d34c0bSJames Smart * address=0 2272d9d34c0bSJames Smart * length=length of the data series 2273e399441dSJames Smart */ 2274d9d34c0bSJames Smart sqe->rw.dptr.sgl.type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 2275d9d34c0bSJames Smart NVME_SGL_FMT_TRANSPORT_A; 2276e399441dSJames Smart sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); 2277e399441dSJames Smart sqe->rw.dptr.sgl.addr = 0; 2278e399441dSJames Smart 227978a7ac26SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) { 2280e399441dSJames Smart ret = nvme_fc_map_data(ctrl, op->rq, op); 2281e399441dSJames Smart if (ret < 0) { 2282e399441dSJames Smart nvme_cleanup_cmd(op->rq); 2283e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2284fc17b653SChristoph Hellwig if (ret == -ENOMEM || ret == -EAGAIN) 2285fc17b653SChristoph Hellwig return BLK_STS_RESOURCE; 2286fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2287e399441dSJames Smart } 2288e399441dSJames Smart } 2289e399441dSJames Smart 2290e399441dSJames Smart fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, 2291e399441dSJames Smart sizeof(op->cmd_iu), DMA_TO_DEVICE); 2292e399441dSJames Smart 2293e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_ACTIVE); 2294e399441dSJames Smart 229578a7ac26SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) 2296e399441dSJames Smart blk_mq_start_request(op->rq); 2297e399441dSJames Smart 2298e399441dSJames Smart ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, 2299e399441dSJames Smart &ctrl->rport->remoteport, 2300e399441dSJames Smart queue->lldd_handle, &op->fcp_req); 2301e399441dSJames Smart 2302e399441dSJames Smart if (ret) { 23038b25f351SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) 2304e399441dSJames Smart nvme_fc_unmap_data(ctrl, op->rq, op); 2305e399441dSJames Smart 2306e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2307e399441dSJames Smart 23088b25f351SJames Smart if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE && 23098b25f351SJames Smart ret != -EBUSY) 2310fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2311e399441dSJames Smart 231286ff7c2aSMing Lei return BLK_STS_RESOURCE; 2313e399441dSJames Smart } 2314e399441dSJames Smart 2315fc17b653SChristoph Hellwig return BLK_STS_OK; 2316e399441dSJames Smart } 2317e399441dSJames Smart 23189e0ed16aSSagi Grimberg static inline blk_status_t nvme_fc_is_ready(struct nvme_fc_queue *queue, 23199e0ed16aSSagi Grimberg struct request *rq) 23209e0ed16aSSagi Grimberg { 23219e0ed16aSSagi Grimberg if (unlikely(!test_bit(NVME_FC_Q_LIVE, &queue->flags))) 23229e0ed16aSSagi Grimberg return nvmf_check_init_req(&queue->ctrl->ctrl, rq); 23239e0ed16aSSagi Grimberg return BLK_STS_OK; 23249e0ed16aSSagi Grimberg } 23259e0ed16aSSagi Grimberg 2326fc17b653SChristoph Hellwig static blk_status_t 2327e399441dSJames Smart nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, 2328e399441dSJames Smart const struct blk_mq_queue_data *bd) 2329e399441dSJames Smart { 2330e399441dSJames Smart struct nvme_ns *ns = hctx->queue->queuedata; 2331e399441dSJames Smart struct nvme_fc_queue *queue = hctx->driver_data; 2332e399441dSJames Smart struct nvme_fc_ctrl *ctrl = queue->ctrl; 2333e399441dSJames Smart struct request *rq = bd->rq; 2334e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2335e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 2336e399441dSJames Smart struct nvme_command *sqe = &cmdiu->sqe; 2337e399441dSJames Smart enum nvmefc_fcp_datadir io_dir; 2338e399441dSJames Smart u32 data_len; 2339fc17b653SChristoph Hellwig blk_status_t ret; 2340e399441dSJames Smart 23419e0ed16aSSagi Grimberg ret = nvme_fc_is_ready(queue, rq); 23429e0ed16aSSagi Grimberg if (unlikely(ret)) 23439e0ed16aSSagi Grimberg return ret; 23449e0ed16aSSagi Grimberg 2345e399441dSJames Smart ret = nvme_setup_cmd(ns, rq, sqe); 2346e399441dSJames Smart if (ret) 2347e399441dSJames Smart return ret; 2348e399441dSJames Smart 2349b131c61dSChristoph Hellwig data_len = blk_rq_payload_bytes(rq); 2350e399441dSJames Smart if (data_len) 2351e399441dSJames Smart io_dir = ((rq_data_dir(rq) == WRITE) ? 2352e399441dSJames Smart NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); 2353e399441dSJames Smart else 2354e399441dSJames Smart io_dir = NVMEFC_FCP_NODATA; 2355e399441dSJames Smart 2356e399441dSJames Smart return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); 2357e399441dSJames Smart } 2358e399441dSJames Smart 2359e399441dSJames Smart static struct blk_mq_tags * 2360e399441dSJames Smart nvme_fc_tagset(struct nvme_fc_queue *queue) 2361e399441dSJames Smart { 2362e399441dSJames Smart if (queue->qnum == 0) 2363e399441dSJames Smart return queue->ctrl->admin_tag_set.tags[queue->qnum]; 2364e399441dSJames Smart 2365e399441dSJames Smart return queue->ctrl->tag_set.tags[queue->qnum - 1]; 2366e399441dSJames Smart } 2367e399441dSJames Smart 2368e399441dSJames Smart static int 2369e399441dSJames Smart nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) 2370e399441dSJames Smart 2371e399441dSJames Smart { 2372e399441dSJames Smart struct nvme_fc_queue *queue = hctx->driver_data; 2373e399441dSJames Smart struct nvme_fc_ctrl *ctrl = queue->ctrl; 2374e399441dSJames Smart struct request *req; 2375e399441dSJames Smart struct nvme_fc_fcp_op *op; 2376e399441dSJames Smart 2377e399441dSJames Smart req = blk_mq_tag_to_rq(nvme_fc_tagset(queue), tag); 237861bff8efSJames Smart if (!req) 2379e399441dSJames Smart return 0; 2380e399441dSJames Smart 2381e399441dSJames Smart op = blk_mq_rq_to_pdu(req); 2382e399441dSJames Smart 2383e399441dSJames Smart if ((atomic_read(&op->state) == FCPOP_STATE_ACTIVE) && 2384e399441dSJames Smart (ctrl->lport->ops->poll_queue)) 2385e399441dSJames Smart ctrl->lport->ops->poll_queue(&ctrl->lport->localport, 2386e399441dSJames Smart queue->lldd_handle); 2387e399441dSJames Smart 2388e399441dSJames Smart return ((atomic_read(&op->state) != FCPOP_STATE_ACTIVE)); 2389e399441dSJames Smart } 2390e399441dSJames Smart 2391e399441dSJames Smart static void 2392ad22c355SKeith Busch nvme_fc_submit_async_event(struct nvme_ctrl *arg) 2393e399441dSJames Smart { 2394e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); 2395e399441dSJames Smart struct nvme_fc_fcp_op *aen_op; 239661bff8efSJames Smart unsigned long flags; 239761bff8efSJames Smart bool terminating = false; 2398fc17b653SChristoph Hellwig blk_status_t ret; 2399e399441dSJames Smart 240061bff8efSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 240161bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 240261bff8efSJames Smart terminating = true; 240361bff8efSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 240461bff8efSJames Smart 240561bff8efSJames Smart if (terminating) 240661bff8efSJames Smart return; 240761bff8efSJames Smart 2408ad22c355SKeith Busch aen_op = &ctrl->aen_ops[0]; 2409e399441dSJames Smart 2410e399441dSJames Smart ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, 2411e399441dSJames Smart NVMEFC_FCP_NODATA); 2412e399441dSJames Smart if (ret) 2413e399441dSJames Smart dev_err(ctrl->ctrl.device, 2414ad22c355SKeith Busch "failed async event work\n"); 2415e399441dSJames Smart } 2416e399441dSJames Smart 2417e399441dSJames Smart static void 241878a7ac26SJames Smart __nvme_fc_final_op_cleanup(struct request *rq) 2419e399441dSJames Smart { 2420e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2421e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 2422e399441dSJames Smart 242378a7ac26SJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 242478a7ac26SJames Smart op->flags &= ~(FCOP_FLAGS_TERMIO | FCOP_FLAGS_RELEASED | 242578a7ac26SJames Smart FCOP_FLAGS_COMPLETE); 2426e399441dSJames Smart 2427e399441dSJames Smart nvme_fc_unmap_data(ctrl, rq, op); 242877f02a7aSChristoph Hellwig nvme_complete_rq(rq); 2429e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2430e399441dSJames Smart 2431e399441dSJames Smart } 2432e399441dSJames Smart 243378a7ac26SJames Smart static void 243478a7ac26SJames Smart nvme_fc_complete_rq(struct request *rq) 243578a7ac26SJames Smart { 243678a7ac26SJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 243778a7ac26SJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 243878a7ac26SJames Smart unsigned long flags; 243978a7ac26SJames Smart bool completed = false; 244078a7ac26SJames Smart 244178a7ac26SJames Smart /* 244278a7ac26SJames Smart * the core layer, on controller resets after calling 244378a7ac26SJames Smart * nvme_shutdown_ctrl(), calls complete_rq without our 244478a7ac26SJames Smart * calling blk_mq_complete_request(), thus there may still 244578a7ac26SJames Smart * be live i/o outstanding with the LLDD. Means transport has 244678a7ac26SJames Smart * to track complete calls vs fcpio_done calls to know what 244778a7ac26SJames Smart * path to take on completes and dones. 244878a7ac26SJames Smart */ 244978a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 245078a7ac26SJames Smart if (op->flags & FCOP_FLAGS_COMPLETE) 245178a7ac26SJames Smart completed = true; 245278a7ac26SJames Smart else 245378a7ac26SJames Smart op->flags |= FCOP_FLAGS_RELEASED; 245478a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 245578a7ac26SJames Smart 245678a7ac26SJames Smart if (completed) 245778a7ac26SJames Smart __nvme_fc_final_op_cleanup(rq); 245878a7ac26SJames Smart } 245978a7ac26SJames Smart 2460e399441dSJames Smart /* 2461e399441dSJames Smart * This routine is used by the transport when it needs to find active 2462e399441dSJames Smart * io on a queue that is to be terminated. The transport uses 2463e399441dSJames Smart * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke 2464e399441dSJames Smart * this routine to kill them on a 1 by 1 basis. 2465e399441dSJames Smart * 2466e399441dSJames Smart * As FC allocates FC exchange for each io, the transport must contact 2467e399441dSJames Smart * the LLDD to terminate the exchange, thus releasing the FC exchange. 2468e399441dSJames Smart * After terminating the exchange the LLDD will call the transport's 2469e399441dSJames Smart * normal io done path for the request, but it will have an aborted 2470e399441dSJames Smart * status. The done path will return the io request back to the block 2471e399441dSJames Smart * layer with an error status. 2472e399441dSJames Smart */ 2473e399441dSJames Smart static void 2474e399441dSJames Smart nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) 2475e399441dSJames Smart { 2476e399441dSJames Smart struct nvme_ctrl *nctrl = data; 2477e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 2478e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); 247978a7ac26SJames Smart unsigned long flags; 2480e399441dSJames Smart int status; 2481e399441dSJames Smart 2482e399441dSJames Smart if (!blk_mq_request_started(req)) 2483e399441dSJames Smart return; 2484e399441dSJames Smart 248578a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 248661bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 248761bff8efSJames Smart ctrl->iocnt++; 248878a7ac26SJames Smart op->flags |= FCOP_FLAGS_TERMIO; 248961bff8efSJames Smart } 249078a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 249178a7ac26SJames Smart 2492e399441dSJames Smart status = __nvme_fc_abort_op(ctrl, op); 249378a7ac26SJames Smart if (status) { 2494e399441dSJames Smart /* 249578a7ac26SJames Smart * if __nvme_fc_abort_op failed the io wasn't 249678a7ac26SJames Smart * active. Thus this call path is running in 249778a7ac26SJames Smart * parallel to the io complete. Treat as non-error. 2498e399441dSJames Smart */ 249978a7ac26SJames Smart 250078a7ac26SJames Smart /* back out the flags/counters */ 250178a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 250261bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 250361bff8efSJames Smart ctrl->iocnt--; 250478a7ac26SJames Smart op->flags &= ~FCOP_FLAGS_TERMIO; 250578a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 2506e399441dSJames Smart return; 2507e399441dSJames Smart } 250878a7ac26SJames Smart } 2509e399441dSJames Smart 2510e399441dSJames Smart 251161bff8efSJames Smart static const struct blk_mq_ops nvme_fc_mq_ops = { 251261bff8efSJames Smart .queue_rq = nvme_fc_queue_rq, 251361bff8efSJames Smart .complete = nvme_fc_complete_rq, 251461bff8efSJames Smart .init_request = nvme_fc_init_request, 251561bff8efSJames Smart .exit_request = nvme_fc_exit_request, 251661bff8efSJames Smart .init_hctx = nvme_fc_init_hctx, 251761bff8efSJames Smart .poll = nvme_fc_poll, 251861bff8efSJames Smart .timeout = nvme_fc_timeout, 2519e399441dSJames Smart }; 2520e399441dSJames Smart 2521e399441dSJames Smart static int 2522e399441dSJames Smart nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) 2523e399441dSJames Smart { 2524e399441dSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 25257314183dSSagi Grimberg unsigned int nr_io_queues; 2526e399441dSJames Smart int ret; 2527e399441dSJames Smart 25287314183dSSagi Grimberg nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), 25297314183dSSagi Grimberg ctrl->lport->ops->max_hw_queues); 25307314183dSSagi Grimberg ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); 2531e399441dSJames Smart if (ret) { 2532e399441dSJames Smart dev_info(ctrl->ctrl.device, 2533e399441dSJames Smart "set_queue_count failed: %d\n", ret); 2534e399441dSJames Smart return ret; 2535e399441dSJames Smart } 2536e399441dSJames Smart 25377314183dSSagi Grimberg ctrl->ctrl.queue_count = nr_io_queues + 1; 25387314183dSSagi Grimberg if (!nr_io_queues) 2539e399441dSJames Smart return 0; 2540e399441dSJames Smart 2541e399441dSJames Smart nvme_fc_init_io_queues(ctrl); 2542e399441dSJames Smart 2543e399441dSJames Smart memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); 2544e399441dSJames Smart ctrl->tag_set.ops = &nvme_fc_mq_ops; 2545e399441dSJames Smart ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; 2546e399441dSJames Smart ctrl->tag_set.reserved_tags = 1; /* fabric connect */ 2547e399441dSJames Smart ctrl->tag_set.numa_node = NUMA_NO_NODE; 2548e399441dSJames Smart ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; 2549e399441dSJames Smart ctrl->tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + 2550e399441dSJames Smart (SG_CHUNK_SIZE * 2551e399441dSJames Smart sizeof(struct scatterlist)) + 2552e399441dSJames Smart ctrl->lport->ops->fcprqst_priv_sz; 2553e399441dSJames Smart ctrl->tag_set.driver_data = ctrl; 2554d858e5f0SSagi Grimberg ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1; 2555e399441dSJames Smart ctrl->tag_set.timeout = NVME_IO_TIMEOUT; 2556e399441dSJames Smart 2557e399441dSJames Smart ret = blk_mq_alloc_tag_set(&ctrl->tag_set); 2558e399441dSJames Smart if (ret) 2559e399441dSJames Smart return ret; 2560e399441dSJames Smart 2561e399441dSJames Smart ctrl->ctrl.tagset = &ctrl->tag_set; 2562e399441dSJames Smart 2563e399441dSJames Smart ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); 2564e399441dSJames Smart if (IS_ERR(ctrl->ctrl.connect_q)) { 2565e399441dSJames Smart ret = PTR_ERR(ctrl->ctrl.connect_q); 2566e399441dSJames Smart goto out_free_tag_set; 2567e399441dSJames Smart } 2568e399441dSJames Smart 2569e399441dSJames Smart ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 2570e399441dSJames Smart if (ret) 2571e399441dSJames Smart goto out_cleanup_blk_queue; 2572e399441dSJames Smart 2573e399441dSJames Smart ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 2574e399441dSJames Smart if (ret) 2575e399441dSJames Smart goto out_delete_hw_queues; 2576e399441dSJames Smart 2577e399441dSJames Smart return 0; 2578e399441dSJames Smart 2579e399441dSJames Smart out_delete_hw_queues: 2580e399441dSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 2581e399441dSJames Smart out_cleanup_blk_queue: 2582e399441dSJames Smart blk_cleanup_queue(ctrl->ctrl.connect_q); 2583e399441dSJames Smart out_free_tag_set: 2584e399441dSJames Smart blk_mq_free_tag_set(&ctrl->tag_set); 2585e399441dSJames Smart nvme_fc_free_io_queues(ctrl); 2586e399441dSJames Smart 2587e399441dSJames Smart /* force put free routine to ignore io queues */ 2588e399441dSJames Smart ctrl->ctrl.tagset = NULL; 2589e399441dSJames Smart 2590e399441dSJames Smart return ret; 2591e399441dSJames Smart } 2592e399441dSJames Smart 259361bff8efSJames Smart static int 259461bff8efSJames Smart nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl) 259561bff8efSJames Smart { 259661bff8efSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 25977314183dSSagi Grimberg unsigned int nr_io_queues; 259861bff8efSJames Smart int ret; 259961bff8efSJames Smart 26007314183dSSagi Grimberg nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), 26017314183dSSagi Grimberg ctrl->lport->ops->max_hw_queues); 26027314183dSSagi Grimberg ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); 260361bff8efSJames Smart if (ret) { 260461bff8efSJames Smart dev_info(ctrl->ctrl.device, 260561bff8efSJames Smart "set_queue_count failed: %d\n", ret); 260661bff8efSJames Smart return ret; 260761bff8efSJames Smart } 260861bff8efSJames Smart 26097314183dSSagi Grimberg ctrl->ctrl.queue_count = nr_io_queues + 1; 261061bff8efSJames Smart /* check for io queues existing */ 2611d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count == 1) 261261bff8efSJames Smart return 0; 261361bff8efSJames Smart 261461bff8efSJames Smart nvme_fc_init_io_queues(ctrl); 261561bff8efSJames Smart 261631b84460SSagi Grimberg ret = nvme_reinit_tagset(&ctrl->ctrl, ctrl->ctrl.tagset); 261761bff8efSJames Smart if (ret) 261861bff8efSJames Smart goto out_free_io_queues; 261961bff8efSJames Smart 262061bff8efSJames Smart ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 262161bff8efSJames Smart if (ret) 262261bff8efSJames Smart goto out_free_io_queues; 262361bff8efSJames Smart 262461bff8efSJames Smart ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 262561bff8efSJames Smart if (ret) 262661bff8efSJames Smart goto out_delete_hw_queues; 262761bff8efSJames Smart 2628cda5fd1aSSagi Grimberg blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); 2629cda5fd1aSSagi Grimberg 263061bff8efSJames Smart return 0; 263161bff8efSJames Smart 263261bff8efSJames Smart out_delete_hw_queues: 263361bff8efSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 263461bff8efSJames Smart out_free_io_queues: 263561bff8efSJames Smart nvme_fc_free_io_queues(ctrl); 263661bff8efSJames Smart return ret; 263761bff8efSJames Smart } 263861bff8efSJames Smart 2639158bfb88SJames Smart static void 2640158bfb88SJames Smart nvme_fc_rport_active_on_lport(struct nvme_fc_rport *rport) 2641158bfb88SJames Smart { 2642158bfb88SJames Smart struct nvme_fc_lport *lport = rport->lport; 2643158bfb88SJames Smart 2644158bfb88SJames Smart atomic_inc(&lport->act_rport_cnt); 2645158bfb88SJames Smart } 2646158bfb88SJames Smart 2647158bfb88SJames Smart static void 2648158bfb88SJames Smart nvme_fc_rport_inactive_on_lport(struct nvme_fc_rport *rport) 2649158bfb88SJames Smart { 2650158bfb88SJames Smart struct nvme_fc_lport *lport = rport->lport; 2651158bfb88SJames Smart u32 cnt; 2652158bfb88SJames Smart 2653158bfb88SJames Smart cnt = atomic_dec_return(&lport->act_rport_cnt); 2654158bfb88SJames Smart if (cnt == 0 && lport->localport.port_state == FC_OBJSTATE_DELETED) 2655158bfb88SJames Smart lport->ops->localport_delete(&lport->localport); 2656158bfb88SJames Smart } 2657158bfb88SJames Smart 2658158bfb88SJames Smart static int 2659158bfb88SJames Smart nvme_fc_ctlr_active_on_rport(struct nvme_fc_ctrl *ctrl) 2660158bfb88SJames Smart { 2661158bfb88SJames Smart struct nvme_fc_rport *rport = ctrl->rport; 2662158bfb88SJames Smart u32 cnt; 2663158bfb88SJames Smart 2664158bfb88SJames Smart if (ctrl->assoc_active) 2665158bfb88SJames Smart return 1; 2666158bfb88SJames Smart 2667158bfb88SJames Smart ctrl->assoc_active = true; 2668158bfb88SJames Smart cnt = atomic_inc_return(&rport->act_ctrl_cnt); 2669158bfb88SJames Smart if (cnt == 1) 2670158bfb88SJames Smart nvme_fc_rport_active_on_lport(rport); 2671158bfb88SJames Smart 2672158bfb88SJames Smart return 0; 2673158bfb88SJames Smart } 2674158bfb88SJames Smart 2675158bfb88SJames Smart static int 2676158bfb88SJames Smart nvme_fc_ctlr_inactive_on_rport(struct nvme_fc_ctrl *ctrl) 2677158bfb88SJames Smart { 2678158bfb88SJames Smart struct nvme_fc_rport *rport = ctrl->rport; 2679158bfb88SJames Smart struct nvme_fc_lport *lport = rport->lport; 2680158bfb88SJames Smart u32 cnt; 2681158bfb88SJames Smart 2682158bfb88SJames Smart /* ctrl->assoc_active=false will be set independently */ 2683158bfb88SJames Smart 2684158bfb88SJames Smart cnt = atomic_dec_return(&rport->act_ctrl_cnt); 2685158bfb88SJames Smart if (cnt == 0) { 2686158bfb88SJames Smart if (rport->remoteport.port_state == FC_OBJSTATE_DELETED) 2687158bfb88SJames Smart lport->ops->remoteport_delete(&rport->remoteport); 2688158bfb88SJames Smart nvme_fc_rport_inactive_on_lport(rport); 2689158bfb88SJames Smart } 2690158bfb88SJames Smart 2691158bfb88SJames Smart return 0; 2692158bfb88SJames Smart } 2693158bfb88SJames Smart 269461bff8efSJames Smart /* 269561bff8efSJames Smart * This routine restarts the controller on the host side, and 269661bff8efSJames Smart * on the link side, recreates the controller association. 269761bff8efSJames Smart */ 269861bff8efSJames Smart static int 269961bff8efSJames Smart nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) 270061bff8efSJames Smart { 270161bff8efSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 270261bff8efSJames Smart int ret; 270361bff8efSJames Smart bool changed; 270461bff8efSJames Smart 2705fdf9dfa8SSagi Grimberg ++ctrl->ctrl.nr_reconnects; 270661bff8efSJames Smart 270796e24801SJames Smart if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 270896e24801SJames Smart return -ENODEV; 270996e24801SJames Smart 2710158bfb88SJames Smart if (nvme_fc_ctlr_active_on_rport(ctrl)) 2711158bfb88SJames Smart return -ENOTUNIQ; 2712158bfb88SJames Smart 271361bff8efSJames Smart /* 271461bff8efSJames Smart * Create the admin queue 271561bff8efSJames Smart */ 271661bff8efSJames Smart 271708e15075SKeith Busch nvme_fc_init_queue(ctrl, 0); 271861bff8efSJames Smart 271961bff8efSJames Smart ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, 272038dabe21SKeith Busch NVME_AQ_BLK_MQ_DEPTH); 272161bff8efSJames Smart if (ret) 272261bff8efSJames Smart goto out_free_queue; 272361bff8efSJames Smart 272461bff8efSJames Smart ret = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], 272538dabe21SKeith Busch NVME_AQ_BLK_MQ_DEPTH, 272638dabe21SKeith Busch (NVME_AQ_BLK_MQ_DEPTH / 4)); 272761bff8efSJames Smart if (ret) 272861bff8efSJames Smart goto out_delete_hw_queue; 272961bff8efSJames Smart 273061bff8efSJames Smart if (ctrl->ctrl.state != NVME_CTRL_NEW) 2731f9c5af5fSSagi Grimberg blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 273261bff8efSJames Smart 273361bff8efSJames Smart ret = nvmf_connect_admin_queue(&ctrl->ctrl); 273461bff8efSJames Smart if (ret) 273561bff8efSJames Smart goto out_disconnect_admin_queue; 273661bff8efSJames Smart 27379e0ed16aSSagi Grimberg set_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags); 27389e0ed16aSSagi Grimberg 273961bff8efSJames Smart /* 274061bff8efSJames Smart * Check controller capabilities 274161bff8efSJames Smart * 274261bff8efSJames Smart * todo:- add code to check if ctrl attributes changed from 274361bff8efSJames Smart * prior connection values 274461bff8efSJames Smart */ 274561bff8efSJames Smart 274620d0dfe6SSagi Grimberg ret = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->ctrl.cap); 274761bff8efSJames Smart if (ret) { 274861bff8efSJames Smart dev_err(ctrl->ctrl.device, 274961bff8efSJames Smart "prop_get NVME_REG_CAP failed\n"); 275061bff8efSJames Smart goto out_disconnect_admin_queue; 275161bff8efSJames Smart } 275261bff8efSJames Smart 275361bff8efSJames Smart ctrl->ctrl.sqsize = 275420d0dfe6SSagi Grimberg min_t(int, NVME_CAP_MQES(ctrl->ctrl.cap) + 1, ctrl->ctrl.sqsize); 275561bff8efSJames Smart 275620d0dfe6SSagi Grimberg ret = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); 275761bff8efSJames Smart if (ret) 275861bff8efSJames Smart goto out_disconnect_admin_queue; 275961bff8efSJames Smart 2760ecad0d2cSJames Smart ctrl->ctrl.max_hw_sectors = 2761ecad0d2cSJames Smart (ctrl->lport->ops->max_sgl_segments - 1) << (PAGE_SHIFT - 9); 276261bff8efSJames Smart 276361bff8efSJames Smart ret = nvme_init_identify(&ctrl->ctrl); 276461bff8efSJames Smart if (ret) 276561bff8efSJames Smart goto out_disconnect_admin_queue; 276661bff8efSJames Smart 276761bff8efSJames Smart /* sanity checks */ 276861bff8efSJames Smart 276961bff8efSJames Smart /* FC-NVME does not have other data in the capsule */ 277061bff8efSJames Smart if (ctrl->ctrl.icdoff) { 277161bff8efSJames Smart dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", 277261bff8efSJames Smart ctrl->ctrl.icdoff); 277361bff8efSJames Smart goto out_disconnect_admin_queue; 277461bff8efSJames Smart } 277561bff8efSJames Smart 277661bff8efSJames Smart /* FC-NVME supports normal SGL Data Block Descriptors */ 277761bff8efSJames Smart 277861bff8efSJames Smart if (opts->queue_size > ctrl->ctrl.maxcmd) { 277961bff8efSJames Smart /* warn if maxcmd is lower than queue_size */ 278061bff8efSJames Smart dev_warn(ctrl->ctrl.device, 278161bff8efSJames Smart "queue_size %zu > ctrl maxcmd %u, reducing " 278261bff8efSJames Smart "to queue_size\n", 278361bff8efSJames Smart opts->queue_size, ctrl->ctrl.maxcmd); 278461bff8efSJames Smart opts->queue_size = ctrl->ctrl.maxcmd; 278561bff8efSJames Smart } 278661bff8efSJames Smart 278761bff8efSJames Smart ret = nvme_fc_init_aen_ops(ctrl); 278861bff8efSJames Smart if (ret) 278961bff8efSJames Smart goto out_term_aen_ops; 279061bff8efSJames Smart 279161bff8efSJames Smart /* 279261bff8efSJames Smart * Create the io queues 279361bff8efSJames Smart */ 279461bff8efSJames Smart 2795d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count > 1) { 279661bff8efSJames Smart if (ctrl->ctrl.state == NVME_CTRL_NEW) 279761bff8efSJames Smart ret = nvme_fc_create_io_queues(ctrl); 279861bff8efSJames Smart else 279961bff8efSJames Smart ret = nvme_fc_reinit_io_queues(ctrl); 280061bff8efSJames Smart if (ret) 280161bff8efSJames Smart goto out_term_aen_ops; 280261bff8efSJames Smart } 280361bff8efSJames Smart 280461bff8efSJames Smart changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); 280561bff8efSJames Smart 2806fdf9dfa8SSagi Grimberg ctrl->ctrl.nr_reconnects = 0; 280761bff8efSJames Smart 280844c6ec77SJames Smart if (changed) 2809d09f2b45SSagi Grimberg nvme_start_ctrl(&ctrl->ctrl); 281061bff8efSJames Smart 281161bff8efSJames Smart return 0; /* Success */ 281261bff8efSJames Smart 281361bff8efSJames Smart out_term_aen_ops: 281461bff8efSJames Smart nvme_fc_term_aen_ops(ctrl); 281561bff8efSJames Smart out_disconnect_admin_queue: 281661bff8efSJames Smart /* send a Disconnect(association) LS to fc-nvme target */ 281761bff8efSJames Smart nvme_fc_xmt_disconnect_assoc(ctrl); 281861bff8efSJames Smart out_delete_hw_queue: 281961bff8efSJames Smart __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); 282061bff8efSJames Smart out_free_queue: 282161bff8efSJames Smart nvme_fc_free_queue(&ctrl->queues[0]); 2822158bfb88SJames Smart ctrl->assoc_active = false; 2823158bfb88SJames Smart nvme_fc_ctlr_inactive_on_rport(ctrl); 282461bff8efSJames Smart 282561bff8efSJames Smart return ret; 282661bff8efSJames Smart } 282761bff8efSJames Smart 282861bff8efSJames Smart /* 282961bff8efSJames Smart * This routine stops operation of the controller on the host side. 283061bff8efSJames Smart * On the host os stack side: Admin and IO queues are stopped, 283161bff8efSJames Smart * outstanding ios on them terminated via FC ABTS. 283261bff8efSJames Smart * On the link side: the association is terminated. 283361bff8efSJames Smart */ 283461bff8efSJames Smart static void 283561bff8efSJames Smart nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl) 283661bff8efSJames Smart { 283761bff8efSJames Smart unsigned long flags; 283861bff8efSJames Smart 2839158bfb88SJames Smart if (!ctrl->assoc_active) 2840158bfb88SJames Smart return; 2841158bfb88SJames Smart ctrl->assoc_active = false; 2842158bfb88SJames Smart 284361bff8efSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 284461bff8efSJames Smart ctrl->flags |= FCCTRL_TERMIO; 284561bff8efSJames Smart ctrl->iocnt = 0; 284661bff8efSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 284761bff8efSJames Smart 284861bff8efSJames Smart /* 284961bff8efSJames Smart * If io queues are present, stop them and terminate all outstanding 285061bff8efSJames Smart * ios on them. As FC allocates FC exchange for each io, the 285161bff8efSJames Smart * transport must contact the LLDD to terminate the exchange, 285261bff8efSJames Smart * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() 285361bff8efSJames Smart * to tell us what io's are busy and invoke a transport routine 285461bff8efSJames Smart * to kill them with the LLDD. After terminating the exchange 285561bff8efSJames Smart * the LLDD will call the transport's normal io done path, but it 285661bff8efSJames Smart * will have an aborted status. The done path will return the 285761bff8efSJames Smart * io requests back to the block layer as part of normal completions 285861bff8efSJames Smart * (but with error status). 285961bff8efSJames Smart */ 2860d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count > 1) { 286161bff8efSJames Smart nvme_stop_queues(&ctrl->ctrl); 286261bff8efSJames Smart blk_mq_tagset_busy_iter(&ctrl->tag_set, 286361bff8efSJames Smart nvme_fc_terminate_exchange, &ctrl->ctrl); 286461bff8efSJames Smart } 286561bff8efSJames Smart 286661bff8efSJames Smart /* 286761bff8efSJames Smart * Other transports, which don't have link-level contexts bound 286861bff8efSJames Smart * to sqe's, would try to gracefully shutdown the controller by 286961bff8efSJames Smart * writing the registers for shutdown and polling (call 287061bff8efSJames Smart * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially 287161bff8efSJames Smart * just aborted and we will wait on those contexts, and given 287261bff8efSJames Smart * there was no indication of how live the controlelr is on the 287361bff8efSJames Smart * link, don't send more io to create more contexts for the 287461bff8efSJames Smart * shutdown. Let the controller fail via keepalive failure if 287561bff8efSJames Smart * its still present. 287661bff8efSJames Smart */ 287761bff8efSJames Smart 287861bff8efSJames Smart /* 287961bff8efSJames Smart * clean up the admin queue. Same thing as above. 288061bff8efSJames Smart * use blk_mq_tagset_busy_itr() and the transport routine to 288161bff8efSJames Smart * terminate the exchanges. 288261bff8efSJames Smart */ 288344c6ec77SJames Smart if (ctrl->ctrl.state != NVME_CTRL_NEW) 2884f9c5af5fSSagi Grimberg blk_mq_quiesce_queue(ctrl->ctrl.admin_q); 288561bff8efSJames Smart blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, 288661bff8efSJames Smart nvme_fc_terminate_exchange, &ctrl->ctrl); 288761bff8efSJames Smart 288861bff8efSJames Smart /* kill the aens as they are a separate path */ 288961bff8efSJames Smart nvme_fc_abort_aen_ops(ctrl); 289061bff8efSJames Smart 289161bff8efSJames Smart /* wait for all io that had to be aborted */ 28928a82dbf1SJames Smart spin_lock_irq(&ctrl->lock); 289336715cf4SJames Smart wait_event_lock_irq(ctrl->ioabort_wait, ctrl->iocnt == 0, ctrl->lock); 289461bff8efSJames Smart ctrl->flags &= ~FCCTRL_TERMIO; 28958a82dbf1SJames Smart spin_unlock_irq(&ctrl->lock); 289661bff8efSJames Smart 289761bff8efSJames Smart nvme_fc_term_aen_ops(ctrl); 289861bff8efSJames Smart 289961bff8efSJames Smart /* 290061bff8efSJames Smart * send a Disconnect(association) LS to fc-nvme target 290161bff8efSJames Smart * Note: could have been sent at top of process, but 290261bff8efSJames Smart * cleaner on link traffic if after the aborts complete. 290361bff8efSJames Smart * Note: if association doesn't exist, association_id will be 0 290461bff8efSJames Smart */ 290561bff8efSJames Smart if (ctrl->association_id) 290661bff8efSJames Smart nvme_fc_xmt_disconnect_assoc(ctrl); 290761bff8efSJames Smart 290861bff8efSJames Smart if (ctrl->ctrl.tagset) { 290961bff8efSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 291061bff8efSJames Smart nvme_fc_free_io_queues(ctrl); 291161bff8efSJames Smart } 291261bff8efSJames Smart 291361bff8efSJames Smart __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); 291461bff8efSJames Smart nvme_fc_free_queue(&ctrl->queues[0]); 2915158bfb88SJames Smart 2916d625d05eSJames Smart /* re-enable the admin_q so anything new can fast fail */ 2917d625d05eSJames Smart blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 2918d625d05eSJames Smart 2919158bfb88SJames Smart nvme_fc_ctlr_inactive_on_rport(ctrl); 292061bff8efSJames Smart } 292161bff8efSJames Smart 292261bff8efSJames Smart static void 2923c5017e85SChristoph Hellwig nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl) 292461bff8efSJames Smart { 2925c5017e85SChristoph Hellwig struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 292661bff8efSJames Smart 292761bff8efSJames Smart cancel_delayed_work_sync(&ctrl->connect_work); 292861bff8efSJames Smart /* 292961bff8efSJames Smart * kill the association on the link side. this will block 293061bff8efSJames Smart * waiting for io to terminate 293161bff8efSJames Smart */ 293261bff8efSJames Smart nvme_fc_delete_association(ctrl); 29330fd997d3SJames Smart 29340fd997d3SJames Smart /* resume the io queues so that things will fast fail */ 29350fd997d3SJames Smart nvme_start_queues(nctrl); 293661bff8efSJames Smart } 293761bff8efSJames Smart 293861bff8efSJames Smart static void 29395bbecdbcSJames Smart nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) 29405bbecdbcSJames Smart { 29412b632970SJames Smart struct nvme_fc_rport *rport = ctrl->rport; 29422b632970SJames Smart struct nvme_fc_remote_port *portptr = &rport->remoteport; 29432b632970SJames Smart unsigned long recon_delay = ctrl->ctrl.opts->reconnect_delay * HZ; 29442b632970SJames Smart bool recon = true; 29455bbecdbcSJames Smart 294644c6ec77SJames Smart if (ctrl->ctrl.state != NVME_CTRL_RECONNECTING) 29475bbecdbcSJames Smart return; 29485bbecdbcSJames Smart 29492b632970SJames Smart if (portptr->port_state == FC_OBJSTATE_ONLINE) 2950589ff775SJames Smart dev_info(ctrl->ctrl.device, 29515bbecdbcSJames Smart "NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n", 29525bbecdbcSJames Smart ctrl->cnum, status); 29532b632970SJames Smart else if (time_after_eq(jiffies, rport->dev_loss_end)) 29542b632970SJames Smart recon = false; 29555bbecdbcSJames Smart 29562b632970SJames Smart if (recon && nvmf_should_reconnect(&ctrl->ctrl)) { 29572b632970SJames Smart if (portptr->port_state == FC_OBJSTATE_ONLINE) 29585bbecdbcSJames Smart dev_info(ctrl->ctrl.device, 29592b632970SJames Smart "NVME-FC{%d}: Reconnect attempt in %ld " 29602b632970SJames Smart "seconds\n", 29612b632970SJames Smart ctrl->cnum, recon_delay / HZ); 29622b632970SJames Smart else if (time_after(jiffies + recon_delay, rport->dev_loss_end)) 29632b632970SJames Smart recon_delay = rport->dev_loss_end - jiffies; 29642b632970SJames Smart 29652b632970SJames Smart queue_delayed_work(nvme_wq, &ctrl->connect_work, recon_delay); 29665bbecdbcSJames Smart } else { 29672b632970SJames Smart if (portptr->port_state == FC_OBJSTATE_ONLINE) 2968589ff775SJames Smart dev_warn(ctrl->ctrl.device, 29695bbecdbcSJames Smart "NVME-FC{%d}: Max reconnect attempts (%d) " 29705bbecdbcSJames Smart "reached. Removing controller\n", 2971fdf9dfa8SSagi Grimberg ctrl->cnum, ctrl->ctrl.nr_reconnects); 29722b632970SJames Smart else 29732b632970SJames Smart dev_warn(ctrl->ctrl.device, 29742b632970SJames Smart "NVME-FC{%d}: dev_loss_tmo (%d) expired " 29752b632970SJames Smart "while waiting for remoteport connectivity. " 29762b632970SJames Smart "Removing controller\n", ctrl->cnum, 29772b632970SJames Smart portptr->dev_loss_tmo); 2978c5017e85SChristoph Hellwig WARN_ON(nvme_delete_ctrl(&ctrl->ctrl)); 29795bbecdbcSJames Smart } 29805bbecdbcSJames Smart } 29815bbecdbcSJames Smart 29825bbecdbcSJames Smart static void 298361bff8efSJames Smart nvme_fc_reset_ctrl_work(struct work_struct *work) 298461bff8efSJames Smart { 298561bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 2986d86c4d8eSChristoph Hellwig container_of(work, struct nvme_fc_ctrl, ctrl.reset_work); 298761bff8efSJames Smart int ret; 298861bff8efSJames Smart 2989d09f2b45SSagi Grimberg nvme_stop_ctrl(&ctrl->ctrl); 299044c6ec77SJames Smart 299161bff8efSJames Smart /* will block will waiting for io to terminate */ 299261bff8efSJames Smart nvme_fc_delete_association(ctrl); 299361bff8efSJames Smart 299444c6ec77SJames Smart if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RECONNECTING)) { 299544c6ec77SJames Smart dev_err(ctrl->ctrl.device, 299644c6ec77SJames Smart "NVME-FC{%d}: error_recovery: Couldn't change state " 299744c6ec77SJames Smart "to RECONNECTING\n", ctrl->cnum); 299844c6ec77SJames Smart return; 299944c6ec77SJames Smart } 300044c6ec77SJames Smart 30012b632970SJames Smart if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE) 300261bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 30032b632970SJames Smart else 30042b632970SJames Smart ret = -ENOTCONN; 30052b632970SJames Smart 30065bbecdbcSJames Smart if (ret) 30075bbecdbcSJames Smart nvme_fc_reconnect_or_delete(ctrl, ret); 30085bbecdbcSJames Smart else 300961bff8efSJames Smart dev_info(ctrl->ctrl.device, 301096e24801SJames Smart "NVME-FC{%d}: controller reset complete\n", 301196e24801SJames Smart ctrl->cnum); 301261bff8efSJames Smart } 301361bff8efSJames Smart 301461bff8efSJames Smart static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { 301561bff8efSJames Smart .name = "fc", 301661bff8efSJames Smart .module = THIS_MODULE, 3017d3d5b87dSChristoph Hellwig .flags = NVME_F_FABRICS, 301861bff8efSJames Smart .reg_read32 = nvmf_reg_read32, 301961bff8efSJames Smart .reg_read64 = nvmf_reg_read64, 302061bff8efSJames Smart .reg_write32 = nvmf_reg_write32, 302161bff8efSJames Smart .free_ctrl = nvme_fc_nvme_ctrl_freed, 302261bff8efSJames Smart .submit_async_event = nvme_fc_submit_async_event, 3023c5017e85SChristoph Hellwig .delete_ctrl = nvme_fc_delete_ctrl, 302461bff8efSJames Smart .get_address = nvmf_get_address, 302531b84460SSagi Grimberg .reinit_request = nvme_fc_reinit_request, 302661bff8efSJames Smart }; 302761bff8efSJames Smart 302861bff8efSJames Smart static void 302961bff8efSJames Smart nvme_fc_connect_ctrl_work(struct work_struct *work) 303061bff8efSJames Smart { 303161bff8efSJames Smart int ret; 303261bff8efSJames Smart 303361bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 303461bff8efSJames Smart container_of(to_delayed_work(work), 303561bff8efSJames Smart struct nvme_fc_ctrl, connect_work); 303661bff8efSJames Smart 303761bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 30385bbecdbcSJames Smart if (ret) 30395bbecdbcSJames Smart nvme_fc_reconnect_or_delete(ctrl, ret); 30405bbecdbcSJames Smart else 304161bff8efSJames Smart dev_info(ctrl->ctrl.device, 304261bff8efSJames Smart "NVME-FC{%d}: controller reconnect complete\n", 304361bff8efSJames Smart ctrl->cnum); 304461bff8efSJames Smart } 304561bff8efSJames Smart 304661bff8efSJames Smart 304761bff8efSJames Smart static const struct blk_mq_ops nvme_fc_admin_mq_ops = { 304861bff8efSJames Smart .queue_rq = nvme_fc_queue_rq, 304961bff8efSJames Smart .complete = nvme_fc_complete_rq, 305076f983cbSChristoph Hellwig .init_request = nvme_fc_init_request, 305161bff8efSJames Smart .exit_request = nvme_fc_exit_request, 305261bff8efSJames Smart .init_hctx = nvme_fc_init_admin_hctx, 305361bff8efSJames Smart .timeout = nvme_fc_timeout, 305461bff8efSJames Smart }; 305561bff8efSJames Smart 3056e399441dSJames Smart 305756d5f4f1SJames Smart /* 305856d5f4f1SJames Smart * Fails a controller request if it matches an existing controller 305956d5f4f1SJames Smart * (association) with the same tuple: 306056d5f4f1SJames Smart * <Host NQN, Host ID, local FC port, remote FC port, SUBSYS NQN> 306156d5f4f1SJames Smart * 306256d5f4f1SJames Smart * The ports don't need to be compared as they are intrinsically 306356d5f4f1SJames Smart * already matched by the port pointers supplied. 306456d5f4f1SJames Smart */ 306556d5f4f1SJames Smart static bool 306656d5f4f1SJames Smart nvme_fc_existing_controller(struct nvme_fc_rport *rport, 306756d5f4f1SJames Smart struct nvmf_ctrl_options *opts) 306856d5f4f1SJames Smart { 306956d5f4f1SJames Smart struct nvme_fc_ctrl *ctrl; 307056d5f4f1SJames Smart unsigned long flags; 307156d5f4f1SJames Smart bool found = false; 307256d5f4f1SJames Smart 307356d5f4f1SJames Smart spin_lock_irqsave(&rport->lock, flags); 307456d5f4f1SJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { 307556d5f4f1SJames Smart found = nvmf_ctlr_matches_baseopts(&ctrl->ctrl, opts); 307656d5f4f1SJames Smart if (found) 307756d5f4f1SJames Smart break; 307856d5f4f1SJames Smart } 307956d5f4f1SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 308056d5f4f1SJames Smart 308156d5f4f1SJames Smart return found; 308256d5f4f1SJames Smart } 308356d5f4f1SJames Smart 3084e399441dSJames Smart static struct nvme_ctrl * 308561bff8efSJames Smart nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, 3086e399441dSJames Smart struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) 3087e399441dSJames Smart { 3088e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 3089e399441dSJames Smart unsigned long flags; 309017c4dc6eSJames Smart int ret, idx, retry; 3091e399441dSJames Smart 309285e6a6adSJames Smart if (!(rport->remoteport.port_role & 309385e6a6adSJames Smart (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) { 309485e6a6adSJames Smart ret = -EBADR; 309585e6a6adSJames Smart goto out_fail; 309685e6a6adSJames Smart } 309785e6a6adSJames Smart 309856d5f4f1SJames Smart if (!opts->duplicate_connect && 309956d5f4f1SJames Smart nvme_fc_existing_controller(rport, opts)) { 310056d5f4f1SJames Smart ret = -EALREADY; 310156d5f4f1SJames Smart goto out_fail; 310256d5f4f1SJames Smart } 310356d5f4f1SJames Smart 3104e399441dSJames Smart ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 3105e399441dSJames Smart if (!ctrl) { 3106e399441dSJames Smart ret = -ENOMEM; 3107e399441dSJames Smart goto out_fail; 3108e399441dSJames Smart } 3109e399441dSJames Smart 3110e399441dSJames Smart idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); 3111e399441dSJames Smart if (idx < 0) { 3112e399441dSJames Smart ret = -ENOSPC; 3113e399441dSJames Smart goto out_free_ctrl; 3114e399441dSJames Smart } 3115e399441dSJames Smart 3116e399441dSJames Smart ctrl->ctrl.opts = opts; 3117e399441dSJames Smart INIT_LIST_HEAD(&ctrl->ctrl_list); 3118e399441dSJames Smart ctrl->lport = lport; 3119e399441dSJames Smart ctrl->rport = rport; 3120e399441dSJames Smart ctrl->dev = lport->dev; 3121e399441dSJames Smart ctrl->cnum = idx; 3122158bfb88SJames Smart ctrl->assoc_active = false; 31238a82dbf1SJames Smart init_waitqueue_head(&ctrl->ioabort_wait); 3124e399441dSJames Smart 3125e399441dSJames Smart get_device(ctrl->dev); 3126e399441dSJames Smart kref_init(&ctrl->ref); 3127e399441dSJames Smart 3128d86c4d8eSChristoph Hellwig INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work); 312961bff8efSJames Smart INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work); 3130e399441dSJames Smart spin_lock_init(&ctrl->lock); 3131e399441dSJames Smart 3132e399441dSJames Smart /* io queue count */ 3133d858e5f0SSagi Grimberg ctrl->ctrl.queue_count = min_t(unsigned int, 3134e399441dSJames Smart opts->nr_io_queues, 3135e399441dSJames Smart lport->ops->max_hw_queues); 3136d858e5f0SSagi Grimberg ctrl->ctrl.queue_count++; /* +1 for admin queue */ 3137e399441dSJames Smart 3138e399441dSJames Smart ctrl->ctrl.sqsize = opts->queue_size - 1; 3139e399441dSJames Smart ctrl->ctrl.kato = opts->kato; 3140e399441dSJames Smart 3141e399441dSJames Smart ret = -ENOMEM; 3142d858e5f0SSagi Grimberg ctrl->queues = kcalloc(ctrl->ctrl.queue_count, 3143d858e5f0SSagi Grimberg sizeof(struct nvme_fc_queue), GFP_KERNEL); 3144e399441dSJames Smart if (!ctrl->queues) 314561bff8efSJames Smart goto out_free_ida; 3146e399441dSJames Smart 314761bff8efSJames Smart memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); 314861bff8efSJames Smart ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; 314938dabe21SKeith Busch ctrl->admin_tag_set.queue_depth = NVME_AQ_MQ_TAG_DEPTH; 315061bff8efSJames Smart ctrl->admin_tag_set.reserved_tags = 2; /* fabric connect + Keep-Alive */ 315161bff8efSJames Smart ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; 315261bff8efSJames Smart ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + 315361bff8efSJames Smart (SG_CHUNK_SIZE * 315461bff8efSJames Smart sizeof(struct scatterlist)) + 315561bff8efSJames Smart ctrl->lport->ops->fcprqst_priv_sz; 315661bff8efSJames Smart ctrl->admin_tag_set.driver_data = ctrl; 315761bff8efSJames Smart ctrl->admin_tag_set.nr_hw_queues = 1; 315861bff8efSJames Smart ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; 31595a22e2bfSIsrael Rukshin ctrl->admin_tag_set.flags = BLK_MQ_F_NO_SCHED; 316061bff8efSJames Smart 316161bff8efSJames Smart ret = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); 3162e399441dSJames Smart if (ret) 316361bff8efSJames Smart goto out_free_queues; 316434b6c231SSagi Grimberg ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; 3165e399441dSJames Smart 316661bff8efSJames Smart ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); 316761bff8efSJames Smart if (IS_ERR(ctrl->ctrl.admin_q)) { 316861bff8efSJames Smart ret = PTR_ERR(ctrl->ctrl.admin_q); 316961bff8efSJames Smart goto out_free_admin_tag_set; 3170e399441dSJames Smart } 3171e399441dSJames Smart 317261bff8efSJames Smart /* 317361bff8efSJames Smart * Would have been nice to init io queues tag set as well. 317461bff8efSJames Smart * However, we require interaction from the controller 317561bff8efSJames Smart * for max io queue count before we can do so. 317661bff8efSJames Smart * Defer this to the connect path. 317761bff8efSJames Smart */ 3178e399441dSJames Smart 317961bff8efSJames Smart ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); 3180e399441dSJames Smart if (ret) 318161bff8efSJames Smart goto out_cleanup_admin_q; 3182e399441dSJames Smart 318361bff8efSJames Smart /* at this point, teardown path changes to ref counting on nvme ctrl */ 3184e399441dSJames Smart 3185e399441dSJames Smart spin_lock_irqsave(&rport->lock, flags); 3186e399441dSJames Smart list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); 3187e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 3188e399441dSJames Smart 318917c4dc6eSJames Smart /* 319017c4dc6eSJames Smart * It's possible that transactions used to create the association 319117c4dc6eSJames Smart * may fail. Examples: CreateAssociation LS or CreateIOConnection 319217c4dc6eSJames Smart * LS gets dropped/corrupted/fails; or a frame gets dropped or a 319317c4dc6eSJames Smart * command times out for one of the actions to init the controller 319417c4dc6eSJames Smart * (Connect, Get/Set_Property, Set_Features, etc). Many of these 319517c4dc6eSJames Smart * transport errors (frame drop, LS failure) inherently must kill 319617c4dc6eSJames Smart * the association. The transport is coded so that any command used 319717c4dc6eSJames Smart * to create the association (prior to a LIVE state transition 319817c4dc6eSJames Smart * while NEW or RECONNECTING) will fail if it completes in error or 319917c4dc6eSJames Smart * times out. 320017c4dc6eSJames Smart * 320117c4dc6eSJames Smart * As such: as the connect request was mostly likely due to a 320217c4dc6eSJames Smart * udev event that discovered the remote port, meaning there is 320317c4dc6eSJames Smart * not an admin or script there to restart if the connect 320417c4dc6eSJames Smart * request fails, retry the initial connection creation up to 320517c4dc6eSJames Smart * three times before giving up and declaring failure. 320617c4dc6eSJames Smart */ 320717c4dc6eSJames Smart for (retry = 0; retry < 3; retry++) { 320861bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 320917c4dc6eSJames Smart if (!ret) 321017c4dc6eSJames Smart break; 321117c4dc6eSJames Smart } 321217c4dc6eSJames Smart 321361bff8efSJames Smart if (ret) { 321417c4dc6eSJames Smart /* couldn't schedule retry - fail out */ 321517c4dc6eSJames Smart dev_err(ctrl->ctrl.device, 321617c4dc6eSJames Smart "NVME-FC{%d}: Connect retry failed\n", ctrl->cnum); 321717c4dc6eSJames Smart 3218de41447aSEwan D. Milne ctrl->ctrl.opts = NULL; 321917c4dc6eSJames Smart 322061bff8efSJames Smart /* initiate nvme ctrl ref counting teardown */ 322161bff8efSJames Smart nvme_uninit_ctrl(&ctrl->ctrl); 322261bff8efSJames Smart 32230b5a7669SJames Smart /* Remove core ctrl ref. */ 32240b5a7669SJames Smart nvme_put_ctrl(&ctrl->ctrl); 32250b5a7669SJames Smart 322661bff8efSJames Smart /* as we're past the point where we transition to the ref 322761bff8efSJames Smart * counting teardown path, if we return a bad pointer here, 322861bff8efSJames Smart * the calling routine, thinking it's prior to the 322961bff8efSJames Smart * transition, will do an rport put. Since the teardown 323061bff8efSJames Smart * path also does a rport put, we do an extra get here to 323161bff8efSJames Smart * so proper order/teardown happens. 323261bff8efSJames Smart */ 323361bff8efSJames Smart nvme_fc_rport_get(rport); 323461bff8efSJames Smart 323561bff8efSJames Smart if (ret > 0) 323661bff8efSJames Smart ret = -EIO; 323761bff8efSJames Smart return ERR_PTR(ret); 3238e399441dSJames Smart } 3239e399441dSJames Smart 3240d22524a4SChristoph Hellwig nvme_get_ctrl(&ctrl->ctrl); 32412cb657bcSJames Smart 324261bff8efSJames Smart dev_info(ctrl->ctrl.device, 324361bff8efSJames Smart "NVME-FC{%d}: new ctrl: NQN \"%s\"\n", 324461bff8efSJames Smart ctrl->cnum, ctrl->ctrl.opts->subsysnqn); 324561bff8efSJames Smart 3246e399441dSJames Smart return &ctrl->ctrl; 3247e399441dSJames Smart 324861bff8efSJames Smart out_cleanup_admin_q: 324961bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.admin_q); 325061bff8efSJames Smart out_free_admin_tag_set: 325161bff8efSJames Smart blk_mq_free_tag_set(&ctrl->admin_tag_set); 325261bff8efSJames Smart out_free_queues: 325361bff8efSJames Smart kfree(ctrl->queues); 3254e399441dSJames Smart out_free_ida: 325561bff8efSJames Smart put_device(ctrl->dev); 3256e399441dSJames Smart ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); 3257e399441dSJames Smart out_free_ctrl: 3258e399441dSJames Smart kfree(ctrl); 3259e399441dSJames Smart out_fail: 3260e399441dSJames Smart /* exit via here doesn't follow ctlr ref points */ 3261e399441dSJames Smart return ERR_PTR(ret); 3262e399441dSJames Smart } 3263e399441dSJames Smart 3264e399441dSJames Smart 3265e399441dSJames Smart struct nvmet_fc_traddr { 3266e399441dSJames Smart u64 nn; 3267e399441dSJames Smart u64 pn; 3268e399441dSJames Smart }; 3269e399441dSJames Smart 3270e399441dSJames Smart static int 32719c5358e1SJames Smart __nvme_fc_parse_u64(substring_t *sstr, u64 *val) 3272e399441dSJames Smart { 3273e399441dSJames Smart u64 token64; 3274e399441dSJames Smart 32759c5358e1SJames Smart if (match_u64(sstr, &token64)) 32769c5358e1SJames Smart return -EINVAL; 32779c5358e1SJames Smart *val = token64; 3278e399441dSJames Smart 32799c5358e1SJames Smart return 0; 3280e399441dSJames Smart } 3281e399441dSJames Smart 32829c5358e1SJames Smart /* 32839c5358e1SJames Smart * This routine validates and extracts the WWN's from the TRADDR string. 32849c5358e1SJames Smart * As kernel parsers need the 0x to determine number base, universally 32859c5358e1SJames Smart * build string to parse with 0x prefix before parsing name strings. 32869c5358e1SJames Smart */ 32879c5358e1SJames Smart static int 32889c5358e1SJames Smart nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen) 32899c5358e1SJames Smart { 32909c5358e1SJames Smart char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1]; 32919c5358e1SJames Smart substring_t wwn = { name, &name[sizeof(name)-1] }; 32929c5358e1SJames Smart int nnoffset, pnoffset; 32939c5358e1SJames Smart 32949c5358e1SJames Smart /* validate it string one of the 2 allowed formats */ 32959c5358e1SJames Smart if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH && 32969c5358e1SJames Smart !strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) && 32979c5358e1SJames Smart !strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET], 32989c5358e1SJames Smart "pn-0x", NVME_FC_TRADDR_OXNNLEN)) { 32999c5358e1SJames Smart nnoffset = NVME_FC_TRADDR_OXNNLEN; 33009c5358e1SJames Smart pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET + 33019c5358e1SJames Smart NVME_FC_TRADDR_OXNNLEN; 33029c5358e1SJames Smart } else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH && 33039c5358e1SJames Smart !strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) && 33049c5358e1SJames Smart !strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET], 33059c5358e1SJames Smart "pn-", NVME_FC_TRADDR_NNLEN))) { 33069c5358e1SJames Smart nnoffset = NVME_FC_TRADDR_NNLEN; 33079c5358e1SJames Smart pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN; 33089c5358e1SJames Smart } else 33099c5358e1SJames Smart goto out_einval; 33109c5358e1SJames Smart 33119c5358e1SJames Smart name[0] = '0'; 33129c5358e1SJames Smart name[1] = 'x'; 33139c5358e1SJames Smart name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0; 33149c5358e1SJames Smart 33159c5358e1SJames Smart memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN); 33169c5358e1SJames Smart if (__nvme_fc_parse_u64(&wwn, &traddr->nn)) 33179c5358e1SJames Smart goto out_einval; 33189c5358e1SJames Smart 33199c5358e1SJames Smart memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN); 33209c5358e1SJames Smart if (__nvme_fc_parse_u64(&wwn, &traddr->pn)) 33219c5358e1SJames Smart goto out_einval; 33229c5358e1SJames Smart 33239c5358e1SJames Smart return 0; 33249c5358e1SJames Smart 33259c5358e1SJames Smart out_einval: 33269c5358e1SJames Smart pr_warn("%s: bad traddr string\n", __func__); 33279c5358e1SJames Smart return -EINVAL; 3328e399441dSJames Smart } 3329e399441dSJames Smart 3330e399441dSJames Smart static struct nvme_ctrl * 3331e399441dSJames Smart nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) 3332e399441dSJames Smart { 3333e399441dSJames Smart struct nvme_fc_lport *lport; 3334e399441dSJames Smart struct nvme_fc_rport *rport; 333561bff8efSJames Smart struct nvme_ctrl *ctrl; 3336e399441dSJames Smart struct nvmet_fc_traddr laddr = { 0L, 0L }; 3337e399441dSJames Smart struct nvmet_fc_traddr raddr = { 0L, 0L }; 3338e399441dSJames Smart unsigned long flags; 3339e399441dSJames Smart int ret; 3340e399441dSJames Smart 33419c5358e1SJames Smart ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE); 3342e399441dSJames Smart if (ret || !raddr.nn || !raddr.pn) 3343e399441dSJames Smart return ERR_PTR(-EINVAL); 3344e399441dSJames Smart 33459c5358e1SJames Smart ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE); 3346e399441dSJames Smart if (ret || !laddr.nn || !laddr.pn) 3347e399441dSJames Smart return ERR_PTR(-EINVAL); 3348e399441dSJames Smart 3349e399441dSJames Smart /* find the host and remote ports to connect together */ 3350e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 3351e399441dSJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 3352e399441dSJames Smart if (lport->localport.node_name != laddr.nn || 3353e399441dSJames Smart lport->localport.port_name != laddr.pn) 3354e399441dSJames Smart continue; 3355e399441dSJames Smart 3356e399441dSJames Smart list_for_each_entry(rport, &lport->endp_list, endp_list) { 3357e399441dSJames Smart if (rport->remoteport.node_name != raddr.nn || 3358e399441dSJames Smart rport->remoteport.port_name != raddr.pn) 3359e399441dSJames Smart continue; 3360e399441dSJames Smart 3361e399441dSJames Smart /* if fail to get reference fall through. Will error */ 3362e399441dSJames Smart if (!nvme_fc_rport_get(rport)) 3363e399441dSJames Smart break; 3364e399441dSJames Smart 3365e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3366e399441dSJames Smart 336761bff8efSJames Smart ctrl = nvme_fc_init_ctrl(dev, opts, lport, rport); 336861bff8efSJames Smart if (IS_ERR(ctrl)) 336961bff8efSJames Smart nvme_fc_rport_put(rport); 337061bff8efSJames Smart return ctrl; 3371e399441dSJames Smart } 3372e399441dSJames Smart } 3373e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3374e399441dSJames Smart 3375e399441dSJames Smart return ERR_PTR(-ENOENT); 3376e399441dSJames Smart } 3377e399441dSJames Smart 3378e399441dSJames Smart 3379e399441dSJames Smart static struct nvmf_transport_ops nvme_fc_transport = { 3380e399441dSJames Smart .name = "fc", 33810de5cd36SRoy Shterman .module = THIS_MODULE, 3382e399441dSJames Smart .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, 33835bbecdbcSJames Smart .allowed_opts = NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_CTRL_LOSS_TMO, 3384e399441dSJames Smart .create_ctrl = nvme_fc_create_ctrl, 3385e399441dSJames Smart }; 3386e399441dSJames Smart 3387e399441dSJames Smart static int __init nvme_fc_init_module(void) 3388e399441dSJames Smart { 33895f568556SJames Smart int ret; 33905f568556SJames Smart 33915f568556SJames Smart /* 33925f568556SJames Smart * NOTE: 33935f568556SJames Smart * It is expected that in the future the kernel will combine 33945f568556SJames Smart * the FC-isms that are currently under scsi and now being 33955f568556SJames Smart * added to by NVME into a new standalone FC class. The SCSI 33965f568556SJames Smart * and NVME protocols and their devices would be under this 33975f568556SJames Smart * new FC class. 33985f568556SJames Smart * 33995f568556SJames Smart * As we need something to post FC-specific udev events to, 34005f568556SJames Smart * specifically for nvme probe events, start by creating the 34015f568556SJames Smart * new device class. When the new standalone FC class is 34025f568556SJames Smart * put in place, this code will move to a more generic 34035f568556SJames Smart * location for the class. 34045f568556SJames Smart */ 34055f568556SJames Smart fc_class = class_create(THIS_MODULE, "fc"); 34065f568556SJames Smart if (IS_ERR(fc_class)) { 34075f568556SJames Smart pr_err("couldn't register class fc\n"); 34085f568556SJames Smart return PTR_ERR(fc_class); 34095f568556SJames Smart } 34105f568556SJames Smart 34115f568556SJames Smart /* 34125f568556SJames Smart * Create a device for the FC-centric udev events 34135f568556SJames Smart */ 34145f568556SJames Smart fc_udev_device = device_create(fc_class, NULL, MKDEV(0, 0), NULL, 34155f568556SJames Smart "fc_udev_device"); 34165f568556SJames Smart if (IS_ERR(fc_udev_device)) { 34175f568556SJames Smart pr_err("couldn't create fc_udev device!\n"); 34185f568556SJames Smart ret = PTR_ERR(fc_udev_device); 34195f568556SJames Smart goto out_destroy_class; 34205f568556SJames Smart } 34215f568556SJames Smart 34225f568556SJames Smart ret = nvmf_register_transport(&nvme_fc_transport); 34235f568556SJames Smart if (ret) 34245f568556SJames Smart goto out_destroy_device; 34255f568556SJames Smart 34265f568556SJames Smart return 0; 34275f568556SJames Smart 34285f568556SJames Smart out_destroy_device: 34295f568556SJames Smart device_destroy(fc_class, MKDEV(0, 0)); 34305f568556SJames Smart out_destroy_class: 34315f568556SJames Smart class_destroy(fc_class); 34325f568556SJames Smart return ret; 3433e399441dSJames Smart } 3434e399441dSJames Smart 3435e399441dSJames Smart static void __exit nvme_fc_exit_module(void) 3436e399441dSJames Smart { 3437e399441dSJames Smart /* sanity check - all lports should be removed */ 3438e399441dSJames Smart if (!list_empty(&nvme_fc_lport_list)) 3439e399441dSJames Smart pr_warn("%s: localport list not empty\n", __func__); 3440e399441dSJames Smart 3441e399441dSJames Smart nvmf_unregister_transport(&nvme_fc_transport); 3442e399441dSJames Smart 3443e399441dSJames Smart ida_destroy(&nvme_fc_local_port_cnt); 3444e399441dSJames Smart ida_destroy(&nvme_fc_ctrl_cnt); 34455f568556SJames Smart 34465f568556SJames Smart device_destroy(fc_class, MKDEV(0, 0)); 34475f568556SJames Smart class_destroy(fc_class); 3448e399441dSJames Smart } 3449e399441dSJames Smart 3450e399441dSJames Smart module_init(nvme_fc_init_module); 3451e399441dSJames Smart module_exit(nvme_fc_exit_module); 3452e399441dSJames Smart 3453e399441dSJames Smart MODULE_LICENSE("GPL v2"); 3454