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 /* 34e399441dSJames Smart * We handle AEN commands ourselves and don't even let the 35e399441dSJames Smart * block layer know about them. 36e399441dSJames Smart */ 37e399441dSJames Smart #define NVME_FC_NR_AEN_COMMANDS 1 38e399441dSJames Smart #define NVME_FC_AQ_BLKMQ_DEPTH \ 397aa1f427SSagi Grimberg (NVME_AQ_DEPTH - NVME_FC_NR_AEN_COMMANDS) 40e399441dSJames Smart #define AEN_CMDID_BASE (NVME_FC_AQ_BLKMQ_DEPTH + 1) 41e399441dSJames Smart 42e399441dSJames Smart enum nvme_fc_queue_flags { 43e399441dSJames Smart NVME_FC_Q_CONNECTED = (1 << 0), 44e399441dSJames Smart }; 45e399441dSJames Smart 46e399441dSJames Smart #define NVMEFC_QUEUE_DELAY 3 /* ms units */ 47e399441dSJames Smart 48e399441dSJames Smart struct nvme_fc_queue { 49e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 50e399441dSJames Smart struct device *dev; 51e399441dSJames Smart struct blk_mq_hw_ctx *hctx; 52e399441dSJames Smart void *lldd_handle; 53e399441dSJames Smart int queue_size; 54e399441dSJames Smart size_t cmnd_capsule_len; 55e399441dSJames Smart u32 qnum; 56e399441dSJames Smart u32 rqcnt; 57e399441dSJames Smart u32 seqno; 58e399441dSJames Smart 59e399441dSJames Smart u64 connection_id; 60e399441dSJames Smart atomic_t csn; 61e399441dSJames Smart 62e399441dSJames Smart unsigned long flags; 63e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 64e399441dSJames Smart 658d64daf7SJames Smart enum nvme_fcop_flags { 668d64daf7SJames Smart FCOP_FLAGS_TERMIO = (1 << 0), 678d64daf7SJames Smart FCOP_FLAGS_RELEASED = (1 << 1), 688d64daf7SJames Smart FCOP_FLAGS_COMPLETE = (1 << 2), 6978a7ac26SJames Smart FCOP_FLAGS_AEN = (1 << 3), 708d64daf7SJames Smart }; 718d64daf7SJames Smart 72e399441dSJames Smart struct nvmefc_ls_req_op { 73e399441dSJames Smart struct nvmefc_ls_req ls_req; 74e399441dSJames Smart 75c913a8b0SJames Smart struct nvme_fc_rport *rport; 76e399441dSJames Smart struct nvme_fc_queue *queue; 77e399441dSJames Smart struct request *rq; 788d64daf7SJames Smart u32 flags; 79e399441dSJames Smart 80e399441dSJames Smart int ls_error; 81e399441dSJames Smart struct completion ls_done; 82c913a8b0SJames Smart struct list_head lsreq_list; /* rport->ls_req_list */ 83e399441dSJames Smart bool req_queued; 84e399441dSJames Smart }; 85e399441dSJames Smart 86e399441dSJames Smart enum nvme_fcpop_state { 87e399441dSJames Smart FCPOP_STATE_UNINIT = 0, 88e399441dSJames Smart FCPOP_STATE_IDLE = 1, 89e399441dSJames Smart FCPOP_STATE_ACTIVE = 2, 90e399441dSJames Smart FCPOP_STATE_ABORTED = 3, 9178a7ac26SJames Smart FCPOP_STATE_COMPLETE = 4, 92e399441dSJames Smart }; 93e399441dSJames Smart 94e399441dSJames Smart struct nvme_fc_fcp_op { 95e399441dSJames Smart struct nvme_request nreq; /* 96e399441dSJames Smart * nvme/host/core.c 97e399441dSJames Smart * requires this to be 98e399441dSJames Smart * the 1st element in the 99e399441dSJames Smart * private structure 100e399441dSJames Smart * associated with the 101e399441dSJames Smart * request. 102e399441dSJames Smart */ 103e399441dSJames Smart struct nvmefc_fcp_req fcp_req; 104e399441dSJames Smart 105e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 106e399441dSJames Smart struct nvme_fc_queue *queue; 107e399441dSJames Smart struct request *rq; 108e399441dSJames Smart 109e399441dSJames Smart atomic_t state; 11078a7ac26SJames Smart u32 flags; 111e399441dSJames Smart u32 rqno; 112e399441dSJames Smart u32 nents; 113e399441dSJames Smart 114e399441dSJames Smart struct nvme_fc_cmd_iu cmd_iu; 115e399441dSJames Smart struct nvme_fc_ersp_iu rsp_iu; 116e399441dSJames Smart }; 117e399441dSJames Smart 118e399441dSJames Smart struct nvme_fc_lport { 119e399441dSJames Smart struct nvme_fc_local_port localport; 120e399441dSJames Smart 121e399441dSJames Smart struct ida endp_cnt; 122e399441dSJames Smart struct list_head port_list; /* nvme_fc_port_list */ 123e399441dSJames Smart struct list_head endp_list; 124e399441dSJames Smart struct device *dev; /* physical device for dma */ 125e399441dSJames Smart struct nvme_fc_port_template *ops; 126e399441dSJames Smart struct kref ref; 127e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 128e399441dSJames Smart 129e399441dSJames Smart struct nvme_fc_rport { 130e399441dSJames Smart struct nvme_fc_remote_port remoteport; 131e399441dSJames Smart 132e399441dSJames Smart struct list_head endp_list; /* for lport->endp_list */ 133e399441dSJames Smart struct list_head ctrl_list; 134c913a8b0SJames Smart struct list_head ls_req_list; 135c913a8b0SJames Smart struct device *dev; /* physical device for dma */ 136c913a8b0SJames Smart struct nvme_fc_lport *lport; 137e399441dSJames Smart spinlock_t lock; 138e399441dSJames Smart struct kref ref; 139e399441dSJames Smart } __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ 140e399441dSJames Smart 14161bff8efSJames Smart enum nvme_fcctrl_flags { 14261bff8efSJames Smart FCCTRL_TERMIO = (1 << 0), 143e399441dSJames Smart }; 144e399441dSJames Smart 145e399441dSJames Smart struct nvme_fc_ctrl { 146e399441dSJames Smart spinlock_t lock; 147e399441dSJames Smart struct nvme_fc_queue *queues; 148e399441dSJames Smart struct device *dev; 149e399441dSJames Smart struct nvme_fc_lport *lport; 150e399441dSJames Smart struct nvme_fc_rport *rport; 151e399441dSJames Smart u32 cnum; 152e399441dSJames Smart 153e399441dSJames Smart u64 association_id; 154e399441dSJames Smart 155e399441dSJames Smart struct list_head ctrl_list; /* rport->ctrl_list */ 156e399441dSJames Smart 157e399441dSJames Smart struct blk_mq_tag_set admin_tag_set; 158e399441dSJames Smart struct blk_mq_tag_set tag_set; 159e399441dSJames Smart 16061bff8efSJames Smart struct delayed_work connect_work; 16161bff8efSJames Smart 162e399441dSJames Smart struct kref ref; 16361bff8efSJames Smart u32 flags; 16461bff8efSJames Smart u32 iocnt; 16536715cf4SJames Smart wait_queue_head_t ioabort_wait; 166e399441dSJames Smart 167e399441dSJames Smart struct nvme_fc_fcp_op aen_ops[NVME_FC_NR_AEN_COMMANDS]; 168e399441dSJames Smart 169e399441dSJames Smart struct nvme_ctrl ctrl; 170e399441dSJames Smart }; 171e399441dSJames Smart 172e399441dSJames Smart static inline struct nvme_fc_ctrl * 173e399441dSJames Smart to_fc_ctrl(struct nvme_ctrl *ctrl) 174e399441dSJames Smart { 175e399441dSJames Smart return container_of(ctrl, struct nvme_fc_ctrl, ctrl); 176e399441dSJames Smart } 177e399441dSJames Smart 178e399441dSJames Smart static inline struct nvme_fc_lport * 179e399441dSJames Smart localport_to_lport(struct nvme_fc_local_port *portptr) 180e399441dSJames Smart { 181e399441dSJames Smart return container_of(portptr, struct nvme_fc_lport, localport); 182e399441dSJames Smart } 183e399441dSJames Smart 184e399441dSJames Smart static inline struct nvme_fc_rport * 185e399441dSJames Smart remoteport_to_rport(struct nvme_fc_remote_port *portptr) 186e399441dSJames Smart { 187e399441dSJames Smart return container_of(portptr, struct nvme_fc_rport, remoteport); 188e399441dSJames Smart } 189e399441dSJames Smart 190e399441dSJames Smart static inline struct nvmefc_ls_req_op * 191e399441dSJames Smart ls_req_to_lsop(struct nvmefc_ls_req *lsreq) 192e399441dSJames Smart { 193e399441dSJames Smart return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); 194e399441dSJames Smart } 195e399441dSJames Smart 196e399441dSJames Smart static inline struct nvme_fc_fcp_op * 197e399441dSJames Smart fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) 198e399441dSJames Smart { 199e399441dSJames Smart return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); 200e399441dSJames Smart } 201e399441dSJames Smart 202e399441dSJames Smart 203e399441dSJames Smart 204e399441dSJames Smart /* *************************** Globals **************************** */ 205e399441dSJames Smart 206e399441dSJames Smart 207e399441dSJames Smart static DEFINE_SPINLOCK(nvme_fc_lock); 208e399441dSJames Smart 209e399441dSJames Smart static LIST_HEAD(nvme_fc_lport_list); 210e399441dSJames Smart static DEFINE_IDA(nvme_fc_local_port_cnt); 211e399441dSJames Smart static DEFINE_IDA(nvme_fc_ctrl_cnt); 212e399441dSJames Smart 213e399441dSJames Smart 214e399441dSJames Smart 2155f568556SJames Smart /* 2165f568556SJames Smart * These items are short-term. They will eventually be moved into 2175f568556SJames Smart * a generic FC class. See comments in module init. 2185f568556SJames Smart */ 2195f568556SJames Smart static struct class *fc_class; 2205f568556SJames Smart static struct device *fc_udev_device; 2215f568556SJames Smart 222e399441dSJames Smart 223e399441dSJames Smart /* *********************** FC-NVME Port Management ************************ */ 224e399441dSJames Smart 225e399441dSJames Smart static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, 226e399441dSJames Smart struct nvme_fc_queue *, unsigned int); 227e399441dSJames Smart 2285533d424SJames Smart static void 2295533d424SJames Smart nvme_fc_free_lport(struct kref *ref) 2305533d424SJames Smart { 2315533d424SJames Smart struct nvme_fc_lport *lport = 2325533d424SJames Smart container_of(ref, struct nvme_fc_lport, ref); 2335533d424SJames Smart unsigned long flags; 2345533d424SJames Smart 2355533d424SJames Smart WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); 2365533d424SJames Smart WARN_ON(!list_empty(&lport->endp_list)); 2375533d424SJames Smart 2385533d424SJames Smart /* remove from transport list */ 2395533d424SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2405533d424SJames Smart list_del(&lport->port_list); 2415533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 2425533d424SJames Smart 2435533d424SJames Smart /* let the LLDD know we've finished tearing it down */ 2445533d424SJames Smart lport->ops->localport_delete(&lport->localport); 2455533d424SJames Smart 2465533d424SJames Smart ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); 2475533d424SJames Smart ida_destroy(&lport->endp_cnt); 2485533d424SJames Smart 2495533d424SJames Smart put_device(lport->dev); 2505533d424SJames Smart 2515533d424SJames Smart kfree(lport); 2525533d424SJames Smart } 2535533d424SJames Smart 2545533d424SJames Smart static void 2555533d424SJames Smart nvme_fc_lport_put(struct nvme_fc_lport *lport) 2565533d424SJames Smart { 2575533d424SJames Smart kref_put(&lport->ref, nvme_fc_free_lport); 2585533d424SJames Smart } 2595533d424SJames Smart 2605533d424SJames Smart static int 2615533d424SJames Smart nvme_fc_lport_get(struct nvme_fc_lport *lport) 2625533d424SJames Smart { 2635533d424SJames Smart return kref_get_unless_zero(&lport->ref); 2645533d424SJames Smart } 2655533d424SJames Smart 2665533d424SJames Smart 2675533d424SJames Smart static struct nvme_fc_lport * 2685533d424SJames Smart nvme_fc_attach_to_unreg_lport(struct nvme_fc_port_info *pinfo) 2695533d424SJames Smart { 2705533d424SJames Smart struct nvme_fc_lport *lport; 2715533d424SJames Smart unsigned long flags; 2725533d424SJames Smart 2735533d424SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2745533d424SJames Smart 2755533d424SJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 2765533d424SJames Smart if (lport->localport.node_name != pinfo->node_name || 2775533d424SJames Smart lport->localport.port_name != pinfo->port_name) 2785533d424SJames Smart continue; 2795533d424SJames Smart 2805533d424SJames Smart if (lport->localport.port_state != FC_OBJSTATE_DELETED) { 2815533d424SJames Smart lport = ERR_PTR(-EEXIST); 2825533d424SJames Smart goto out_done; 2835533d424SJames Smart } 2845533d424SJames Smart 2855533d424SJames Smart if (!nvme_fc_lport_get(lport)) { 2865533d424SJames Smart /* 2875533d424SJames Smart * fails if ref cnt already 0. If so, 2885533d424SJames Smart * act as if lport already deleted 2895533d424SJames Smart */ 2905533d424SJames Smart lport = NULL; 2915533d424SJames Smart goto out_done; 2925533d424SJames Smart } 2935533d424SJames Smart 2945533d424SJames Smart /* resume the lport */ 2955533d424SJames Smart 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 */ 3565533d424SJames Smart newrec = nvme_fc_attach_to_unreg_lport(pinfo); 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); 392e399441dSJames Smart newrec->ops = template; 393e399441dSJames Smart newrec->dev = dev; 394e399441dSJames Smart ida_init(&newrec->endp_cnt); 395e399441dSJames Smart newrec->localport.private = &newrec[1]; 396e399441dSJames Smart newrec->localport.node_name = pinfo->node_name; 397e399441dSJames Smart newrec->localport.port_name = pinfo->port_name; 398e399441dSJames Smart newrec->localport.port_role = pinfo->port_role; 399e399441dSJames Smart newrec->localport.port_id = pinfo->port_id; 400e399441dSJames Smart newrec->localport.port_state = FC_OBJSTATE_ONLINE; 401e399441dSJames Smart newrec->localport.port_num = idx; 402e399441dSJames Smart 403e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 404e399441dSJames Smart list_add_tail(&newrec->port_list, &nvme_fc_lport_list); 405e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 406e399441dSJames Smart 407e399441dSJames Smart if (dev) 408e399441dSJames Smart dma_set_seg_boundary(dev, template->dma_boundary); 409e399441dSJames Smart 410e399441dSJames Smart *portptr = &newrec->localport; 411e399441dSJames Smart return 0; 412e399441dSJames Smart 413e399441dSJames Smart out_ida_put: 414e399441dSJames Smart ida_simple_remove(&nvme_fc_local_port_cnt, idx); 415e399441dSJames Smart out_fail_kfree: 416e399441dSJames Smart kfree(newrec); 417e399441dSJames Smart out_reghost_failed: 418e399441dSJames Smart *portptr = NULL; 419e399441dSJames Smart 420e399441dSJames Smart return ret; 421e399441dSJames Smart } 422e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_register_localport); 423e399441dSJames Smart 424e399441dSJames Smart /** 425e399441dSJames Smart * nvme_fc_unregister_localport - transport entry point called by an 426e399441dSJames Smart * LLDD to deregister/remove a previously 427e399441dSJames Smart * registered a NVME host FC port. 428e399441dSJames Smart * @localport: pointer to the (registered) local port that is to be 429e399441dSJames Smart * deregistered. 430e399441dSJames Smart * 431e399441dSJames Smart * Returns: 432e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 433e399441dSJames Smart * (ex: -ENXIO) upon failure. 434e399441dSJames Smart */ 435e399441dSJames Smart int 436e399441dSJames Smart nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) 437e399441dSJames Smart { 438e399441dSJames Smart struct nvme_fc_lport *lport = localport_to_lport(portptr); 439e399441dSJames Smart unsigned long flags; 440e399441dSJames Smart 441e399441dSJames Smart if (!portptr) 442e399441dSJames Smart return -EINVAL; 443e399441dSJames Smart 444e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 445e399441dSJames Smart 446e399441dSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 447e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 448e399441dSJames Smart return -EINVAL; 449e399441dSJames Smart } 450e399441dSJames Smart portptr->port_state = FC_OBJSTATE_DELETED; 451e399441dSJames Smart 452e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 453e399441dSJames Smart 454e399441dSJames Smart nvme_fc_lport_put(lport); 455e399441dSJames Smart 456e399441dSJames Smart return 0; 457e399441dSJames Smart } 458e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); 459e399441dSJames Smart 460eaefd5abSJames Smart /* 461eaefd5abSJames Smart * TRADDR strings, per FC-NVME are fixed format: 462eaefd5abSJames Smart * "nn-0x<16hexdigits>:pn-0x<16hexdigits>" - 43 characters 463eaefd5abSJames Smart * udev event will only differ by prefix of what field is 464eaefd5abSJames Smart * being specified: 465eaefd5abSJames Smart * "NVMEFC_HOST_TRADDR=" or "NVMEFC_TRADDR=" - 19 max characters 466eaefd5abSJames Smart * 19 + 43 + null_fudge = 64 characters 467eaefd5abSJames Smart */ 468eaefd5abSJames Smart #define FCNVME_TRADDR_LENGTH 64 469eaefd5abSJames Smart 470eaefd5abSJames Smart static void 471eaefd5abSJames Smart nvme_fc_signal_discovery_scan(struct nvme_fc_lport *lport, 472eaefd5abSJames Smart struct nvme_fc_rport *rport) 473eaefd5abSJames Smart { 474eaefd5abSJames Smart char hostaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_HOST_TRADDR=...*/ 475eaefd5abSJames Smart char tgtaddr[FCNVME_TRADDR_LENGTH]; /* NVMEFC_TRADDR=...*/ 476eaefd5abSJames Smart char *envp[4] = { "FC_EVENT=nvmediscovery", hostaddr, tgtaddr, NULL }; 477eaefd5abSJames Smart 478eaefd5abSJames Smart if (!(rport->remoteport.port_role & FC_PORT_ROLE_NVME_DISCOVERY)) 479eaefd5abSJames Smart return; 480eaefd5abSJames Smart 481eaefd5abSJames Smart snprintf(hostaddr, sizeof(hostaddr), 482eaefd5abSJames Smart "NVMEFC_HOST_TRADDR=nn-0x%016llx:pn-0x%016llx", 483eaefd5abSJames Smart lport->localport.node_name, lport->localport.port_name); 484eaefd5abSJames Smart snprintf(tgtaddr, sizeof(tgtaddr), 485eaefd5abSJames Smart "NVMEFC_TRADDR=nn-0x%016llx:pn-0x%016llx", 486eaefd5abSJames Smart rport->remoteport.node_name, rport->remoteport.port_name); 487eaefd5abSJames Smart kobject_uevent_env(&fc_udev_device->kobj, KOBJ_CHANGE, envp); 488eaefd5abSJames Smart } 489eaefd5abSJames Smart 490469d0ef0SJames Smart static void 491469d0ef0SJames Smart nvme_fc_free_rport(struct kref *ref) 492469d0ef0SJames Smart { 493469d0ef0SJames Smart struct nvme_fc_rport *rport = 494469d0ef0SJames Smart container_of(ref, struct nvme_fc_rport, ref); 495469d0ef0SJames Smart struct nvme_fc_lport *lport = 496469d0ef0SJames Smart localport_to_lport(rport->remoteport.localport); 497469d0ef0SJames Smart unsigned long flags; 498469d0ef0SJames Smart 499469d0ef0SJames Smart WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); 500469d0ef0SJames Smart WARN_ON(!list_empty(&rport->ctrl_list)); 501469d0ef0SJames Smart 502469d0ef0SJames Smart /* remove from lport list */ 503469d0ef0SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 504469d0ef0SJames Smart list_del(&rport->endp_list); 505469d0ef0SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 506469d0ef0SJames Smart 507469d0ef0SJames Smart /* let the LLDD know we've finished tearing it down */ 508469d0ef0SJames Smart lport->ops->remoteport_delete(&rport->remoteport); 509469d0ef0SJames Smart 510469d0ef0SJames Smart ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); 511469d0ef0SJames Smart 512469d0ef0SJames Smart kfree(rport); 513469d0ef0SJames Smart 514469d0ef0SJames Smart nvme_fc_lport_put(lport); 515469d0ef0SJames Smart } 516469d0ef0SJames Smart 517469d0ef0SJames Smart static void 518469d0ef0SJames Smart nvme_fc_rport_put(struct nvme_fc_rport *rport) 519469d0ef0SJames Smart { 520469d0ef0SJames Smart kref_put(&rport->ref, nvme_fc_free_rport); 521469d0ef0SJames Smart } 522469d0ef0SJames Smart 523469d0ef0SJames Smart static int 524469d0ef0SJames Smart nvme_fc_rport_get(struct nvme_fc_rport *rport) 525469d0ef0SJames Smart { 526469d0ef0SJames Smart return kref_get_unless_zero(&rport->ref); 527469d0ef0SJames Smart } 528469d0ef0SJames Smart 529e399441dSJames Smart /** 530e399441dSJames Smart * nvme_fc_register_remoteport - transport entry point called by an 531e399441dSJames Smart * LLDD to register the existence of a NVME 532e399441dSJames Smart * subsystem FC port on its fabric. 533e399441dSJames Smart * @localport: pointer to the (registered) local port that the remote 534e399441dSJames Smart * subsystem port is connected to. 535e399441dSJames Smart * @pinfo: pointer to information about the port to be registered 536e399441dSJames Smart * @rport_p: pointer to a remote port pointer. Upon success, the routine 537e399441dSJames Smart * will allocate a nvme_fc_remote_port structure and place its 538e399441dSJames Smart * address in the remote port pointer. Upon failure, remote port 539e399441dSJames Smart * pointer will be set to 0. 540e399441dSJames Smart * 541e399441dSJames Smart * Returns: 542e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 543e399441dSJames Smart * (ex: -ENXIO) upon failure. 544e399441dSJames Smart */ 545e399441dSJames Smart int 546e399441dSJames Smart nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, 547e399441dSJames Smart struct nvme_fc_port_info *pinfo, 548e399441dSJames Smart struct nvme_fc_remote_port **portptr) 549e399441dSJames Smart { 550e399441dSJames Smart struct nvme_fc_lport *lport = localport_to_lport(localport); 551e399441dSJames Smart struct nvme_fc_rport *newrec; 552e399441dSJames Smart unsigned long flags; 553e399441dSJames Smart int ret, idx; 554e399441dSJames Smart 555e399441dSJames Smart newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), 556e399441dSJames Smart GFP_KERNEL); 557e399441dSJames Smart if (!newrec) { 558e399441dSJames Smart ret = -ENOMEM; 559e399441dSJames Smart goto out_reghost_failed; 560e399441dSJames Smart } 561e399441dSJames Smart 562e399441dSJames Smart if (!nvme_fc_lport_get(lport)) { 563e399441dSJames Smart ret = -ESHUTDOWN; 564e399441dSJames Smart goto out_kfree_rport; 565e399441dSJames Smart } 566e399441dSJames Smart 567e399441dSJames Smart idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); 568e399441dSJames Smart if (idx < 0) { 569e399441dSJames Smart ret = -ENOSPC; 570e399441dSJames Smart goto out_lport_put; 571e399441dSJames Smart } 572e399441dSJames Smart 573e399441dSJames Smart INIT_LIST_HEAD(&newrec->endp_list); 574e399441dSJames Smart INIT_LIST_HEAD(&newrec->ctrl_list); 575c913a8b0SJames Smart INIT_LIST_HEAD(&newrec->ls_req_list); 576e399441dSJames Smart kref_init(&newrec->ref); 577e399441dSJames Smart spin_lock_init(&newrec->lock); 578e399441dSJames Smart newrec->remoteport.localport = &lport->localport; 579c913a8b0SJames Smart newrec->dev = lport->dev; 580c913a8b0SJames Smart newrec->lport = lport; 581e399441dSJames Smart newrec->remoteport.private = &newrec[1]; 582e399441dSJames Smart newrec->remoteport.port_role = pinfo->port_role; 583e399441dSJames Smart newrec->remoteport.node_name = pinfo->node_name; 584e399441dSJames Smart newrec->remoteport.port_name = pinfo->port_name; 585e399441dSJames Smart newrec->remoteport.port_id = pinfo->port_id; 586e399441dSJames Smart newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; 587e399441dSJames Smart newrec->remoteport.port_num = idx; 588e399441dSJames Smart 589e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 590e399441dSJames Smart list_add_tail(&newrec->endp_list, &lport->endp_list); 591e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 592e399441dSJames Smart 593eaefd5abSJames Smart nvme_fc_signal_discovery_scan(lport, newrec); 594eaefd5abSJames Smart 595e399441dSJames Smart *portptr = &newrec->remoteport; 596e399441dSJames Smart return 0; 597e399441dSJames Smart 598e399441dSJames Smart out_lport_put: 599e399441dSJames Smart nvme_fc_lport_put(lport); 600e399441dSJames Smart out_kfree_rport: 601e399441dSJames Smart kfree(newrec); 602e399441dSJames Smart out_reghost_failed: 603e399441dSJames Smart *portptr = NULL; 604e399441dSJames Smart return ret; 605e399441dSJames Smart } 606e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); 607e399441dSJames Smart 6088d64daf7SJames Smart static int 6098d64daf7SJames Smart nvme_fc_abort_lsops(struct nvme_fc_rport *rport) 6108d64daf7SJames Smart { 6118d64daf7SJames Smart struct nvmefc_ls_req_op *lsop; 6128d64daf7SJames Smart unsigned long flags; 6138d64daf7SJames Smart 6148d64daf7SJames Smart restart: 6158d64daf7SJames Smart spin_lock_irqsave(&rport->lock, flags); 6168d64daf7SJames Smart 6178d64daf7SJames Smart list_for_each_entry(lsop, &rport->ls_req_list, lsreq_list) { 6188d64daf7SJames Smart if (!(lsop->flags & FCOP_FLAGS_TERMIO)) { 6198d64daf7SJames Smart lsop->flags |= FCOP_FLAGS_TERMIO; 6208d64daf7SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 6218d64daf7SJames Smart rport->lport->ops->ls_abort(&rport->lport->localport, 6228d64daf7SJames Smart &rport->remoteport, 6238d64daf7SJames Smart &lsop->ls_req); 6248d64daf7SJames Smart goto restart; 6258d64daf7SJames Smart } 6268d64daf7SJames Smart } 6278d64daf7SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 6288d64daf7SJames Smart 6298d64daf7SJames Smart return 0; 6308d64daf7SJames Smart } 6318d64daf7SJames Smart 632e399441dSJames Smart /** 633e399441dSJames Smart * nvme_fc_unregister_remoteport - transport entry point called by an 634e399441dSJames Smart * LLDD to deregister/remove a previously 635e399441dSJames Smart * registered a NVME subsystem FC port. 636e399441dSJames Smart * @remoteport: pointer to the (registered) remote port that is to be 637e399441dSJames Smart * deregistered. 638e399441dSJames Smart * 639e399441dSJames Smart * Returns: 640e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 641e399441dSJames Smart * (ex: -ENXIO) upon failure. 642e399441dSJames Smart */ 643e399441dSJames Smart int 644e399441dSJames Smart nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) 645e399441dSJames Smart { 646e399441dSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(portptr); 647e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 648e399441dSJames Smart unsigned long flags; 649e399441dSJames Smart 650e399441dSJames Smart if (!portptr) 651e399441dSJames Smart return -EINVAL; 652e399441dSJames Smart 653e399441dSJames Smart spin_lock_irqsave(&rport->lock, flags); 654e399441dSJames Smart 655e399441dSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 656e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 657e399441dSJames Smart return -EINVAL; 658e399441dSJames Smart } 659e399441dSJames Smart portptr->port_state = FC_OBJSTATE_DELETED; 660e399441dSJames Smart 661e399441dSJames Smart /* tear down all associations to the remote port */ 662e399441dSJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) 663c5017e85SChristoph Hellwig nvme_delete_ctrl(&ctrl->ctrl); 664e399441dSJames Smart 665e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 666e399441dSJames Smart 6678d64daf7SJames Smart nvme_fc_abort_lsops(rport); 6688d64daf7SJames Smart 669e399441dSJames Smart nvme_fc_rport_put(rport); 670e399441dSJames Smart return 0; 671e399441dSJames Smart } 672e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); 673e399441dSJames Smart 674eaefd5abSJames Smart /** 675eaefd5abSJames Smart * nvme_fc_rescan_remoteport - transport entry point called by an 676eaefd5abSJames Smart * LLDD to request a nvme device rescan. 677eaefd5abSJames Smart * @remoteport: pointer to the (registered) remote port that is to be 678eaefd5abSJames Smart * rescanned. 679eaefd5abSJames Smart * 680eaefd5abSJames Smart * Returns: N/A 681eaefd5abSJames Smart */ 682eaefd5abSJames Smart void 683eaefd5abSJames Smart nvme_fc_rescan_remoteport(struct nvme_fc_remote_port *remoteport) 684eaefd5abSJames Smart { 685eaefd5abSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(remoteport); 686eaefd5abSJames Smart 687eaefd5abSJames Smart nvme_fc_signal_discovery_scan(rport->lport, rport); 688eaefd5abSJames Smart } 689eaefd5abSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_rescan_remoteport); 690eaefd5abSJames Smart 691e399441dSJames Smart 692e399441dSJames Smart /* *********************** FC-NVME DMA Handling **************************** */ 693e399441dSJames Smart 694e399441dSJames Smart /* 695e399441dSJames Smart * The fcloop device passes in a NULL device pointer. Real LLD's will 696e399441dSJames Smart * pass in a valid device pointer. If NULL is passed to the dma mapping 697e399441dSJames Smart * routines, depending on the platform, it may or may not succeed, and 698e399441dSJames Smart * may crash. 699e399441dSJames Smart * 700e399441dSJames Smart * As such: 701e399441dSJames Smart * Wrapper all the dma routines and check the dev pointer. 702e399441dSJames Smart * 703e399441dSJames Smart * If simple mappings (return just a dma address, we'll noop them, 704e399441dSJames Smart * returning a dma address of 0. 705e399441dSJames Smart * 706e399441dSJames Smart * On more complex mappings (dma_map_sg), a pseudo routine fills 707e399441dSJames Smart * in the scatter list, setting all dma addresses to 0. 708e399441dSJames Smart */ 709e399441dSJames Smart 710e399441dSJames Smart static inline dma_addr_t 711e399441dSJames Smart fc_dma_map_single(struct device *dev, void *ptr, size_t size, 712e399441dSJames Smart enum dma_data_direction dir) 713e399441dSJames Smart { 714e399441dSJames Smart return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; 715e399441dSJames Smart } 716e399441dSJames Smart 717e399441dSJames Smart static inline int 718e399441dSJames Smart fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 719e399441dSJames Smart { 720e399441dSJames Smart return dev ? dma_mapping_error(dev, dma_addr) : 0; 721e399441dSJames Smart } 722e399441dSJames Smart 723e399441dSJames Smart static inline void 724e399441dSJames Smart fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, 725e399441dSJames Smart enum dma_data_direction dir) 726e399441dSJames Smart { 727e399441dSJames Smart if (dev) 728e399441dSJames Smart dma_unmap_single(dev, addr, size, dir); 729e399441dSJames Smart } 730e399441dSJames Smart 731e399441dSJames Smart static inline void 732e399441dSJames Smart fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, 733e399441dSJames Smart enum dma_data_direction dir) 734e399441dSJames Smart { 735e399441dSJames Smart if (dev) 736e399441dSJames Smart dma_sync_single_for_cpu(dev, addr, size, dir); 737e399441dSJames Smart } 738e399441dSJames Smart 739e399441dSJames Smart static inline void 740e399441dSJames Smart fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, 741e399441dSJames Smart enum dma_data_direction dir) 742e399441dSJames Smart { 743e399441dSJames Smart if (dev) 744e399441dSJames Smart dma_sync_single_for_device(dev, addr, size, dir); 745e399441dSJames Smart } 746e399441dSJames Smart 747e399441dSJames Smart /* pseudo dma_map_sg call */ 748e399441dSJames Smart static int 749e399441dSJames Smart fc_map_sg(struct scatterlist *sg, int nents) 750e399441dSJames Smart { 751e399441dSJames Smart struct scatterlist *s; 752e399441dSJames Smart int i; 753e399441dSJames Smart 754e399441dSJames Smart WARN_ON(nents == 0 || sg[0].length == 0); 755e399441dSJames Smart 756e399441dSJames Smart for_each_sg(sg, s, nents, i) { 757e399441dSJames Smart s->dma_address = 0L; 758e399441dSJames Smart #ifdef CONFIG_NEED_SG_DMA_LENGTH 759e399441dSJames Smart s->dma_length = s->length; 760e399441dSJames Smart #endif 761e399441dSJames Smart } 762e399441dSJames Smart return nents; 763e399441dSJames Smart } 764e399441dSJames Smart 765e399441dSJames Smart static inline int 766e399441dSJames Smart fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 767e399441dSJames Smart enum dma_data_direction dir) 768e399441dSJames Smart { 769e399441dSJames Smart return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); 770e399441dSJames Smart } 771e399441dSJames Smart 772e399441dSJames Smart static inline void 773e399441dSJames Smart fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, 774e399441dSJames Smart enum dma_data_direction dir) 775e399441dSJames Smart { 776e399441dSJames Smart if (dev) 777e399441dSJames Smart dma_unmap_sg(dev, sg, nents, dir); 778e399441dSJames Smart } 779e399441dSJames Smart 780e399441dSJames Smart 781e399441dSJames Smart /* *********************** FC-NVME LS Handling **************************** */ 782e399441dSJames Smart 783e399441dSJames Smart static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); 784e399441dSJames Smart static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); 785e399441dSJames Smart 786e399441dSJames Smart 787e399441dSJames Smart static void 788c913a8b0SJames Smart __nvme_fc_finish_ls_req(struct nvmefc_ls_req_op *lsop) 789e399441dSJames Smart { 790c913a8b0SJames Smart struct nvme_fc_rport *rport = lsop->rport; 791e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 792e399441dSJames Smart unsigned long flags; 793e399441dSJames Smart 794c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 795e399441dSJames Smart 796e399441dSJames Smart if (!lsop->req_queued) { 797c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 798e399441dSJames Smart return; 799e399441dSJames Smart } 800e399441dSJames Smart 801e399441dSJames Smart list_del(&lsop->lsreq_list); 802e399441dSJames Smart 803e399441dSJames Smart lsop->req_queued = false; 804e399441dSJames Smart 805c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 806e399441dSJames Smart 807c913a8b0SJames Smart fc_dma_unmap_single(rport->dev, lsreq->rqstdma, 808e399441dSJames Smart (lsreq->rqstlen + lsreq->rsplen), 809e399441dSJames Smart DMA_BIDIRECTIONAL); 810e399441dSJames Smart 811c913a8b0SJames Smart nvme_fc_rport_put(rport); 812e399441dSJames Smart } 813e399441dSJames Smart 814e399441dSJames Smart static int 815c913a8b0SJames Smart __nvme_fc_send_ls_req(struct nvme_fc_rport *rport, 816e399441dSJames Smart struct nvmefc_ls_req_op *lsop, 817e399441dSJames Smart void (*done)(struct nvmefc_ls_req *req, int status)) 818e399441dSJames Smart { 819e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 820e399441dSJames Smart unsigned long flags; 821c913a8b0SJames Smart int ret = 0; 822e399441dSJames Smart 823c913a8b0SJames Smart if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 824c913a8b0SJames Smart return -ECONNREFUSED; 825c913a8b0SJames Smart 826c913a8b0SJames Smart if (!nvme_fc_rport_get(rport)) 827e399441dSJames Smart return -ESHUTDOWN; 828e399441dSJames Smart 829e399441dSJames Smart lsreq->done = done; 830c913a8b0SJames Smart lsop->rport = rport; 831e399441dSJames Smart lsop->req_queued = false; 832e399441dSJames Smart INIT_LIST_HEAD(&lsop->lsreq_list); 833e399441dSJames Smart init_completion(&lsop->ls_done); 834e399441dSJames Smart 835c913a8b0SJames Smart lsreq->rqstdma = fc_dma_map_single(rport->dev, lsreq->rqstaddr, 836e399441dSJames Smart lsreq->rqstlen + lsreq->rsplen, 837e399441dSJames Smart DMA_BIDIRECTIONAL); 838c913a8b0SJames Smart if (fc_dma_mapping_error(rport->dev, lsreq->rqstdma)) { 839c913a8b0SJames Smart ret = -EFAULT; 840c913a8b0SJames Smart goto out_putrport; 841e399441dSJames Smart } 842e399441dSJames Smart lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; 843e399441dSJames Smart 844c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 845e399441dSJames Smart 846c913a8b0SJames Smart list_add_tail(&lsop->lsreq_list, &rport->ls_req_list); 847e399441dSJames Smart 848e399441dSJames Smart lsop->req_queued = true; 849e399441dSJames Smart 850c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 851e399441dSJames Smart 852c913a8b0SJames Smart ret = rport->lport->ops->ls_req(&rport->lport->localport, 853c913a8b0SJames Smart &rport->remoteport, lsreq); 854e399441dSJames Smart if (ret) 855c913a8b0SJames Smart goto out_unlink; 856c913a8b0SJames Smart 857c913a8b0SJames Smart return 0; 858c913a8b0SJames Smart 859c913a8b0SJames Smart out_unlink: 860e399441dSJames Smart lsop->ls_error = ret; 861c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 862c913a8b0SJames Smart lsop->req_queued = false; 863c913a8b0SJames Smart list_del(&lsop->lsreq_list); 864c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 865c913a8b0SJames Smart fc_dma_unmap_single(rport->dev, lsreq->rqstdma, 866c913a8b0SJames Smart (lsreq->rqstlen + lsreq->rsplen), 867c913a8b0SJames Smart DMA_BIDIRECTIONAL); 868c913a8b0SJames Smart out_putrport: 869c913a8b0SJames Smart nvme_fc_rport_put(rport); 870e399441dSJames Smart 871e399441dSJames Smart return ret; 872e399441dSJames Smart } 873e399441dSJames Smart 874e399441dSJames Smart static void 875e399441dSJames Smart nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) 876e399441dSJames Smart { 877e399441dSJames Smart struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); 878e399441dSJames Smart 879e399441dSJames Smart lsop->ls_error = status; 880e399441dSJames Smart complete(&lsop->ls_done); 881e399441dSJames Smart } 882e399441dSJames Smart 883e399441dSJames Smart static int 884c913a8b0SJames Smart nvme_fc_send_ls_req(struct nvme_fc_rport *rport, struct nvmefc_ls_req_op *lsop) 885e399441dSJames Smart { 886e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 887e399441dSJames Smart struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; 888e399441dSJames Smart int ret; 889e399441dSJames Smart 890c913a8b0SJames Smart ret = __nvme_fc_send_ls_req(rport, lsop, nvme_fc_send_ls_req_done); 891e399441dSJames Smart 892c913a8b0SJames Smart if (!ret) { 893e399441dSJames Smart /* 894e399441dSJames Smart * No timeout/not interruptible as we need the struct 895e399441dSJames Smart * to exist until the lldd calls us back. Thus mandate 896e399441dSJames Smart * wait until driver calls back. lldd responsible for 897e399441dSJames Smart * the timeout action 898e399441dSJames Smart */ 899e399441dSJames Smart wait_for_completion(&lsop->ls_done); 900e399441dSJames Smart 901c913a8b0SJames Smart __nvme_fc_finish_ls_req(lsop); 902e399441dSJames Smart 903c913a8b0SJames Smart ret = lsop->ls_error; 904e399441dSJames Smart } 905e399441dSJames Smart 906c913a8b0SJames Smart if (ret) 907c913a8b0SJames Smart return ret; 908c913a8b0SJames Smart 909e399441dSJames Smart /* ACC or RJT payload ? */ 910e399441dSJames Smart if (rjt->w0.ls_cmd == FCNVME_LS_RJT) 911e399441dSJames Smart return -ENXIO; 912e399441dSJames Smart 913e399441dSJames Smart return 0; 914e399441dSJames Smart } 915e399441dSJames Smart 916c913a8b0SJames Smart static int 917c913a8b0SJames Smart nvme_fc_send_ls_req_async(struct nvme_fc_rport *rport, 918e399441dSJames Smart struct nvmefc_ls_req_op *lsop, 919e399441dSJames Smart void (*done)(struct nvmefc_ls_req *req, int status)) 920e399441dSJames Smart { 921e399441dSJames Smart /* don't wait for completion */ 922e399441dSJames Smart 923c913a8b0SJames Smart return __nvme_fc_send_ls_req(rport, lsop, done); 924e399441dSJames Smart } 925e399441dSJames Smart 926e399441dSJames Smart /* Validation Error indexes into the string table below */ 927e399441dSJames Smart enum { 928e399441dSJames Smart VERR_NO_ERROR = 0, 929e399441dSJames Smart VERR_LSACC = 1, 930e399441dSJames Smart VERR_LSDESC_RQST = 2, 931e399441dSJames Smart VERR_LSDESC_RQST_LEN = 3, 932e399441dSJames Smart VERR_ASSOC_ID = 4, 933e399441dSJames Smart VERR_ASSOC_ID_LEN = 5, 934e399441dSJames Smart VERR_CONN_ID = 6, 935e399441dSJames Smart VERR_CONN_ID_LEN = 7, 936e399441dSJames Smart VERR_CR_ASSOC = 8, 937e399441dSJames Smart VERR_CR_ASSOC_ACC_LEN = 9, 938e399441dSJames Smart VERR_CR_CONN = 10, 939e399441dSJames Smart VERR_CR_CONN_ACC_LEN = 11, 940e399441dSJames Smart VERR_DISCONN = 12, 941e399441dSJames Smart VERR_DISCONN_ACC_LEN = 13, 942e399441dSJames Smart }; 943e399441dSJames Smart 944e399441dSJames Smart static char *validation_errors[] = { 945e399441dSJames Smart "OK", 946e399441dSJames Smart "Not LS_ACC", 947e399441dSJames Smart "Not LSDESC_RQST", 948e399441dSJames Smart "Bad LSDESC_RQST Length", 949e399441dSJames Smart "Not Association ID", 950e399441dSJames Smart "Bad Association ID Length", 951e399441dSJames Smart "Not Connection ID", 952e399441dSJames Smart "Bad Connection ID Length", 953e399441dSJames Smart "Not CR_ASSOC Rqst", 954e399441dSJames Smart "Bad CR_ASSOC ACC Length", 955e399441dSJames Smart "Not CR_CONN Rqst", 956e399441dSJames Smart "Bad CR_CONN ACC Length", 957e399441dSJames Smart "Not Disconnect Rqst", 958e399441dSJames Smart "Bad Disconnect ACC Length", 959e399441dSJames Smart }; 960e399441dSJames Smart 961e399441dSJames Smart static int 962e399441dSJames Smart nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, 963e399441dSJames Smart struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) 964e399441dSJames Smart { 965e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 966e399441dSJames Smart struct nvmefc_ls_req *lsreq; 967e399441dSJames Smart struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; 968e399441dSJames Smart struct fcnvme_ls_cr_assoc_acc *assoc_acc; 969e399441dSJames Smart int ret, fcret = 0; 970e399441dSJames Smart 971e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 972e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 973e399441dSJames Smart sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL); 974e399441dSJames Smart if (!lsop) { 975e399441dSJames Smart ret = -ENOMEM; 976e399441dSJames Smart goto out_no_memory; 977e399441dSJames Smart } 978e399441dSJames Smart lsreq = &lsop->ls_req; 979e399441dSJames Smart 980e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 981e399441dSJames Smart assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *) 982e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 983e399441dSJames Smart assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; 984e399441dSJames Smart 985e399441dSJames Smart assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; 986e399441dSJames Smart assoc_rqst->desc_list_len = 987e399441dSJames Smart cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); 988e399441dSJames Smart 989e399441dSJames Smart assoc_rqst->assoc_cmd.desc_tag = 990e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); 991e399441dSJames Smart assoc_rqst->assoc_cmd.desc_len = 992e399441dSJames Smart fcnvme_lsdesc_len( 993e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); 994e399441dSJames Smart 995e399441dSJames Smart assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); 996e399441dSJames Smart assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize); 997e399441dSJames Smart /* Linux supports only Dynamic controllers */ 998e399441dSJames Smart assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); 9998e412263SChristoph Hellwig uuid_copy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id); 1000e399441dSJames Smart strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, 1001e399441dSJames Smart min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); 1002e399441dSJames Smart strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, 1003e399441dSJames Smart min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); 1004e399441dSJames Smart 1005e399441dSJames Smart lsop->queue = queue; 1006e399441dSJames Smart lsreq->rqstaddr = assoc_rqst; 1007e399441dSJames Smart lsreq->rqstlen = sizeof(*assoc_rqst); 1008e399441dSJames Smart lsreq->rspaddr = assoc_acc; 1009e399441dSJames Smart lsreq->rsplen = sizeof(*assoc_acc); 1010e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 1011e399441dSJames Smart 1012c913a8b0SJames Smart ret = nvme_fc_send_ls_req(ctrl->rport, lsop); 1013e399441dSJames Smart if (ret) 1014e399441dSJames Smart goto out_free_buffer; 1015e399441dSJames Smart 1016e399441dSJames Smart /* process connect LS completion */ 1017e399441dSJames Smart 1018e399441dSJames Smart /* validate the ACC response */ 1019e399441dSJames Smart if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) 1020e399441dSJames Smart fcret = VERR_LSACC; 1021f77fc87cSJames Smart else if (assoc_acc->hdr.desc_list_len != 1022e399441dSJames Smart fcnvme_lsdesc_len( 1023e399441dSJames Smart sizeof(struct fcnvme_ls_cr_assoc_acc))) 1024e399441dSJames Smart fcret = VERR_CR_ASSOC_ACC_LEN; 1025f77fc87cSJames Smart else if (assoc_acc->hdr.rqst.desc_tag != 1026f77fc87cSJames Smart cpu_to_be32(FCNVME_LSDESC_RQST)) 1027e399441dSJames Smart fcret = VERR_LSDESC_RQST; 1028e399441dSJames Smart else if (assoc_acc->hdr.rqst.desc_len != 1029e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) 1030e399441dSJames Smart fcret = VERR_LSDESC_RQST_LEN; 1031e399441dSJames Smart else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) 1032e399441dSJames Smart fcret = VERR_CR_ASSOC; 1033e399441dSJames Smart else if (assoc_acc->associd.desc_tag != 1034e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) 1035e399441dSJames Smart fcret = VERR_ASSOC_ID; 1036e399441dSJames Smart else if (assoc_acc->associd.desc_len != 1037e399441dSJames Smart fcnvme_lsdesc_len( 1038e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id))) 1039e399441dSJames Smart fcret = VERR_ASSOC_ID_LEN; 1040e399441dSJames Smart else if (assoc_acc->connectid.desc_tag != 1041e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CONN_ID)) 1042e399441dSJames Smart fcret = VERR_CONN_ID; 1043e399441dSJames Smart else if (assoc_acc->connectid.desc_len != 1044e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) 1045e399441dSJames Smart fcret = VERR_CONN_ID_LEN; 1046e399441dSJames Smart 1047e399441dSJames Smart if (fcret) { 1048e399441dSJames Smart ret = -EBADF; 1049e399441dSJames Smart dev_err(ctrl->dev, 1050e399441dSJames Smart "q %d connect failed: %s\n", 1051e399441dSJames Smart queue->qnum, validation_errors[fcret]); 1052e399441dSJames Smart } else { 1053e399441dSJames Smart ctrl->association_id = 1054e399441dSJames Smart be64_to_cpu(assoc_acc->associd.association_id); 1055e399441dSJames Smart queue->connection_id = 1056e399441dSJames Smart be64_to_cpu(assoc_acc->connectid.connection_id); 1057e399441dSJames Smart set_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1058e399441dSJames Smart } 1059e399441dSJames Smart 1060e399441dSJames Smart out_free_buffer: 1061e399441dSJames Smart kfree(lsop); 1062e399441dSJames Smart out_no_memory: 1063e399441dSJames Smart if (ret) 1064e399441dSJames Smart dev_err(ctrl->dev, 1065e399441dSJames Smart "queue %d connect admin queue failed (%d).\n", 1066e399441dSJames Smart queue->qnum, ret); 1067e399441dSJames Smart return ret; 1068e399441dSJames Smart } 1069e399441dSJames Smart 1070e399441dSJames Smart static int 1071e399441dSJames Smart nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, 1072e399441dSJames Smart u16 qsize, u16 ersp_ratio) 1073e399441dSJames Smart { 1074e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1075e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1076e399441dSJames Smart struct fcnvme_ls_cr_conn_rqst *conn_rqst; 1077e399441dSJames Smart struct fcnvme_ls_cr_conn_acc *conn_acc; 1078e399441dSJames Smart int ret, fcret = 0; 1079e399441dSJames Smart 1080e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1081e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 1082e399441dSJames Smart sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL); 1083e399441dSJames Smart if (!lsop) { 1084e399441dSJames Smart ret = -ENOMEM; 1085e399441dSJames Smart goto out_no_memory; 1086e399441dSJames Smart } 1087e399441dSJames Smart lsreq = &lsop->ls_req; 1088e399441dSJames Smart 1089e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 1090e399441dSJames Smart conn_rqst = (struct fcnvme_ls_cr_conn_rqst *) 1091e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 1092e399441dSJames Smart conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; 1093e399441dSJames Smart 1094e399441dSJames Smart conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; 1095e399441dSJames Smart conn_rqst->desc_list_len = cpu_to_be32( 1096e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id) + 1097e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); 1098e399441dSJames Smart 1099e399441dSJames Smart conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); 1100e399441dSJames Smart conn_rqst->associd.desc_len = 1101e399441dSJames Smart fcnvme_lsdesc_len( 1102e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id)); 1103e399441dSJames Smart conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); 1104e399441dSJames Smart conn_rqst->connect_cmd.desc_tag = 1105e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); 1106e399441dSJames Smart conn_rqst->connect_cmd.desc_len = 1107e399441dSJames Smart fcnvme_lsdesc_len( 1108e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); 1109e399441dSJames Smart conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); 1110e399441dSJames Smart conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); 1111e399441dSJames Smart conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize); 1112e399441dSJames Smart 1113e399441dSJames Smart lsop->queue = queue; 1114e399441dSJames Smart lsreq->rqstaddr = conn_rqst; 1115e399441dSJames Smart lsreq->rqstlen = sizeof(*conn_rqst); 1116e399441dSJames Smart lsreq->rspaddr = conn_acc; 1117e399441dSJames Smart lsreq->rsplen = sizeof(*conn_acc); 1118e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 1119e399441dSJames Smart 1120c913a8b0SJames Smart ret = nvme_fc_send_ls_req(ctrl->rport, lsop); 1121e399441dSJames Smart if (ret) 1122e399441dSJames Smart goto out_free_buffer; 1123e399441dSJames Smart 1124e399441dSJames Smart /* process connect LS completion */ 1125e399441dSJames Smart 1126e399441dSJames Smart /* validate the ACC response */ 1127e399441dSJames Smart if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) 1128e399441dSJames Smart fcret = VERR_LSACC; 1129f77fc87cSJames Smart else if (conn_acc->hdr.desc_list_len != 1130e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) 1131e399441dSJames Smart fcret = VERR_CR_CONN_ACC_LEN; 1132f77fc87cSJames Smart else if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) 1133e399441dSJames Smart fcret = VERR_LSDESC_RQST; 1134e399441dSJames Smart else if (conn_acc->hdr.rqst.desc_len != 1135e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) 1136e399441dSJames Smart fcret = VERR_LSDESC_RQST_LEN; 1137e399441dSJames Smart else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) 1138e399441dSJames Smart fcret = VERR_CR_CONN; 1139e399441dSJames Smart else if (conn_acc->connectid.desc_tag != 1140e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CONN_ID)) 1141e399441dSJames Smart fcret = VERR_CONN_ID; 1142e399441dSJames Smart else if (conn_acc->connectid.desc_len != 1143e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) 1144e399441dSJames Smart fcret = VERR_CONN_ID_LEN; 1145e399441dSJames Smart 1146e399441dSJames Smart if (fcret) { 1147e399441dSJames Smart ret = -EBADF; 1148e399441dSJames Smart dev_err(ctrl->dev, 1149e399441dSJames Smart "q %d connect failed: %s\n", 1150e399441dSJames Smart queue->qnum, validation_errors[fcret]); 1151e399441dSJames Smart } else { 1152e399441dSJames Smart queue->connection_id = 1153e399441dSJames Smart be64_to_cpu(conn_acc->connectid.connection_id); 1154e399441dSJames Smart set_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1155e399441dSJames Smart } 1156e399441dSJames Smart 1157e399441dSJames Smart out_free_buffer: 1158e399441dSJames Smart kfree(lsop); 1159e399441dSJames Smart out_no_memory: 1160e399441dSJames Smart if (ret) 1161e399441dSJames Smart dev_err(ctrl->dev, 1162e399441dSJames Smart "queue %d connect command failed (%d).\n", 1163e399441dSJames Smart queue->qnum, ret); 1164e399441dSJames Smart return ret; 1165e399441dSJames Smart } 1166e399441dSJames Smart 1167e399441dSJames Smart static void 1168e399441dSJames Smart nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) 1169e399441dSJames Smart { 1170e399441dSJames Smart struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); 1171e399441dSJames Smart 1172c913a8b0SJames Smart __nvme_fc_finish_ls_req(lsop); 1173e399441dSJames Smart 1174e399441dSJames Smart /* fc-nvme iniator doesn't care about success or failure of cmd */ 1175e399441dSJames Smart 1176e399441dSJames Smart kfree(lsop); 1177e399441dSJames Smart } 1178e399441dSJames Smart 1179e399441dSJames Smart /* 1180e399441dSJames Smart * This routine sends a FC-NVME LS to disconnect (aka terminate) 1181e399441dSJames Smart * the FC-NVME Association. Terminating the association also 1182e399441dSJames Smart * terminates the FC-NVME connections (per queue, both admin and io 1183e399441dSJames Smart * queues) that are part of the association. E.g. things are torn 1184e399441dSJames Smart * down, and the related FC-NVME Association ID and Connection IDs 1185e399441dSJames Smart * become invalid. 1186e399441dSJames Smart * 1187e399441dSJames Smart * The behavior of the fc-nvme initiator is such that it's 1188e399441dSJames Smart * understanding of the association and connections will implicitly 1189e399441dSJames Smart * be torn down. The action is implicit as it may be due to a loss of 1190e399441dSJames Smart * connectivity with the fc-nvme target, so you may never get a 1191e399441dSJames Smart * response even if you tried. As such, the action of this routine 1192e399441dSJames Smart * is to asynchronously send the LS, ignore any results of the LS, and 1193e399441dSJames Smart * continue on with terminating the association. If the fc-nvme target 1194e399441dSJames Smart * is present and receives the LS, it too can tear down. 1195e399441dSJames Smart */ 1196e399441dSJames Smart static void 1197e399441dSJames Smart nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) 1198e399441dSJames Smart { 1199e399441dSJames Smart struct fcnvme_ls_disconnect_rqst *discon_rqst; 1200e399441dSJames Smart struct fcnvme_ls_disconnect_acc *discon_acc; 1201e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1202e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1203c913a8b0SJames Smart int ret; 1204e399441dSJames Smart 1205e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1206e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 1207e399441dSJames Smart sizeof(*discon_rqst) + sizeof(*discon_acc)), 1208e399441dSJames Smart GFP_KERNEL); 1209e399441dSJames Smart if (!lsop) 1210e399441dSJames Smart /* couldn't sent it... too bad */ 1211e399441dSJames Smart return; 1212e399441dSJames Smart 1213e399441dSJames Smart lsreq = &lsop->ls_req; 1214e399441dSJames Smart 1215e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 1216e399441dSJames Smart discon_rqst = (struct fcnvme_ls_disconnect_rqst *) 1217e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 1218e399441dSJames Smart discon_acc = (struct fcnvme_ls_disconnect_acc *)&discon_rqst[1]; 1219e399441dSJames Smart 1220e399441dSJames Smart discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT; 1221e399441dSJames Smart discon_rqst->desc_list_len = cpu_to_be32( 1222e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id) + 1223e399441dSJames Smart sizeof(struct fcnvme_lsdesc_disconn_cmd)); 1224e399441dSJames Smart 1225e399441dSJames Smart discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); 1226e399441dSJames Smart discon_rqst->associd.desc_len = 1227e399441dSJames Smart fcnvme_lsdesc_len( 1228e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id)); 1229e399441dSJames Smart 1230e399441dSJames Smart discon_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); 1231e399441dSJames Smart 1232e399441dSJames Smart discon_rqst->discon_cmd.desc_tag = cpu_to_be32( 1233e399441dSJames Smart FCNVME_LSDESC_DISCONN_CMD); 1234e399441dSJames Smart discon_rqst->discon_cmd.desc_len = 1235e399441dSJames Smart fcnvme_lsdesc_len( 1236e399441dSJames Smart sizeof(struct fcnvme_lsdesc_disconn_cmd)); 1237e399441dSJames Smart discon_rqst->discon_cmd.scope = FCNVME_DISCONN_ASSOCIATION; 1238e399441dSJames Smart discon_rqst->discon_cmd.id = cpu_to_be64(ctrl->association_id); 1239e399441dSJames Smart 1240e399441dSJames Smart lsreq->rqstaddr = discon_rqst; 1241e399441dSJames Smart lsreq->rqstlen = sizeof(*discon_rqst); 1242e399441dSJames Smart lsreq->rspaddr = discon_acc; 1243e399441dSJames Smart lsreq->rsplen = sizeof(*discon_acc); 1244e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 1245e399441dSJames Smart 1246c913a8b0SJames Smart ret = nvme_fc_send_ls_req_async(ctrl->rport, lsop, 1247c913a8b0SJames Smart nvme_fc_disconnect_assoc_done); 1248c913a8b0SJames Smart if (ret) 1249c913a8b0SJames Smart kfree(lsop); 1250e399441dSJames Smart 1251e399441dSJames Smart /* only meaningful part to terminating the association */ 1252e399441dSJames Smart ctrl->association_id = 0; 1253e399441dSJames Smart } 1254e399441dSJames Smart 1255e399441dSJames Smart 1256e399441dSJames Smart /* *********************** NVME Ctrl Routines **************************** */ 1257e399441dSJames Smart 125878a7ac26SJames Smart static void __nvme_fc_final_op_cleanup(struct request *rq); 1259f874d5d0SJames Smart static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg); 1260e399441dSJames Smart 1261e399441dSJames Smart static int 1262e399441dSJames Smart nvme_fc_reinit_request(void *data, struct request *rq) 1263e399441dSJames Smart { 1264e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1265e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 1266e399441dSJames Smart 1267e399441dSJames Smart memset(cmdiu, 0, sizeof(*cmdiu)); 1268e399441dSJames Smart cmdiu->scsi_id = NVME_CMD_SCSI_ID; 1269e399441dSJames Smart cmdiu->fc_id = NVME_CMD_FC_ID; 1270e399441dSJames Smart cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); 1271e399441dSJames Smart memset(&op->rsp_iu, 0, sizeof(op->rsp_iu)); 1272e399441dSJames Smart 1273e399441dSJames Smart return 0; 1274e399441dSJames Smart } 1275e399441dSJames Smart 1276e399441dSJames Smart static void 1277e399441dSJames Smart __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, 1278e399441dSJames Smart struct nvme_fc_fcp_op *op) 1279e399441dSJames Smart { 1280e399441dSJames Smart fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, 1281e399441dSJames Smart sizeof(op->rsp_iu), DMA_FROM_DEVICE); 1282e399441dSJames Smart fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, 1283e399441dSJames Smart sizeof(op->cmd_iu), DMA_TO_DEVICE); 1284e399441dSJames Smart 1285e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_UNINIT); 1286e399441dSJames Smart } 1287e399441dSJames Smart 1288e399441dSJames Smart static void 1289d6296d39SChristoph Hellwig nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq, 1290d6296d39SChristoph Hellwig unsigned int hctx_idx) 1291e399441dSJames Smart { 1292e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1293e399441dSJames Smart 1294d6296d39SChristoph Hellwig return __nvme_fc_exit_request(set->driver_data, op); 1295e399441dSJames Smart } 1296e399441dSJames Smart 129778a7ac26SJames Smart static int 129878a7ac26SJames Smart __nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) 129978a7ac26SJames Smart { 130078a7ac26SJames Smart int state; 130178a7ac26SJames Smart 130278a7ac26SJames Smart state = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); 130378a7ac26SJames Smart if (state != FCPOP_STATE_ACTIVE) { 130478a7ac26SJames Smart atomic_set(&op->state, state); 130578a7ac26SJames Smart return -ECANCELED; 130678a7ac26SJames Smart } 130778a7ac26SJames Smart 130878a7ac26SJames Smart ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, 130978a7ac26SJames Smart &ctrl->rport->remoteport, 131078a7ac26SJames Smart op->queue->lldd_handle, 131178a7ac26SJames Smart &op->fcp_req); 131278a7ac26SJames Smart 131378a7ac26SJames Smart return 0; 131478a7ac26SJames Smart } 131578a7ac26SJames Smart 1316e399441dSJames Smart static void 131778a7ac26SJames Smart nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl) 1318e399441dSJames Smart { 1319e399441dSJames Smart struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; 132078a7ac26SJames Smart unsigned long flags; 132178a7ac26SJames Smart int i, ret; 1322e399441dSJames Smart 1323e399441dSJames Smart for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { 132478a7ac26SJames Smart if (atomic_read(&aen_op->state) != FCPOP_STATE_ACTIVE) 1325e399441dSJames Smart continue; 132678a7ac26SJames Smart 132778a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 132861bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 132961bff8efSJames Smart ctrl->iocnt++; 133078a7ac26SJames Smart aen_op->flags |= FCOP_FLAGS_TERMIO; 133161bff8efSJames Smart } 133278a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 133378a7ac26SJames Smart 133478a7ac26SJames Smart ret = __nvme_fc_abort_op(ctrl, aen_op); 133578a7ac26SJames Smart if (ret) { 133678a7ac26SJames Smart /* 133778a7ac26SJames Smart * if __nvme_fc_abort_op failed the io wasn't 133878a7ac26SJames Smart * active. Thus this call path is running in 133978a7ac26SJames Smart * parallel to the io complete. Treat as non-error. 134078a7ac26SJames Smart */ 134178a7ac26SJames Smart 134278a7ac26SJames Smart /* back out the flags/counters */ 134378a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 134461bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 134561bff8efSJames Smart ctrl->iocnt--; 134678a7ac26SJames Smart aen_op->flags &= ~FCOP_FLAGS_TERMIO; 134778a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 134878a7ac26SJames Smart return; 1349e399441dSJames Smart } 1350e399441dSJames Smart } 135178a7ac26SJames Smart } 135278a7ac26SJames Smart 135378a7ac26SJames Smart static inline int 135478a7ac26SJames Smart __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl, 135578a7ac26SJames Smart struct nvme_fc_fcp_op *op) 135678a7ac26SJames Smart { 135778a7ac26SJames Smart unsigned long flags; 135878a7ac26SJames Smart bool complete_rq = false; 135978a7ac26SJames Smart 136078a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 136161bff8efSJames Smart if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { 136236715cf4SJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 136336715cf4SJames Smart if (!--ctrl->iocnt) 136436715cf4SJames Smart wake_up(&ctrl->ioabort_wait); 136536715cf4SJames Smart } 136661bff8efSJames Smart } 136778a7ac26SJames Smart if (op->flags & FCOP_FLAGS_RELEASED) 136878a7ac26SJames Smart complete_rq = true; 136978a7ac26SJames Smart else 137078a7ac26SJames Smart op->flags |= FCOP_FLAGS_COMPLETE; 137178a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 137278a7ac26SJames Smart 137378a7ac26SJames Smart return complete_rq; 137478a7ac26SJames Smart } 1375e399441dSJames Smart 1376baee29acSChristoph Hellwig static void 1377e399441dSJames Smart nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) 1378e399441dSJames Smart { 1379e399441dSJames Smart struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); 1380e399441dSJames Smart struct request *rq = op->rq; 1381e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 1382e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 1383e399441dSJames Smart struct nvme_fc_queue *queue = op->queue; 1384e399441dSJames Smart struct nvme_completion *cqe = &op->rsp_iu.cqe; 1385458f280dSJames Smart struct nvme_command *sqe = &op->cmd_iu.sqe; 1386d663b69fSChristoph Hellwig __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1); 138727fa9bc5SChristoph Hellwig union nvme_result result; 13880a02e39fSJames Smart bool terminate_assoc = true; 1389e399441dSJames Smart 1390e399441dSJames Smart /* 1391e399441dSJames Smart * WARNING: 1392e399441dSJames Smart * The current linux implementation of a nvme controller 1393e399441dSJames Smart * allocates a single tag set for all io queues and sizes 1394e399441dSJames Smart * the io queues to fully hold all possible tags. Thus, the 1395e399441dSJames Smart * implementation does not reference or care about the sqhd 1396e399441dSJames Smart * value as it never needs to use the sqhd/sqtail pointers 1397e399441dSJames Smart * for submission pacing. 1398e399441dSJames Smart * 1399e399441dSJames Smart * This affects the FC-NVME implementation in two ways: 1400e399441dSJames Smart * 1) As the value doesn't matter, we don't need to waste 1401e399441dSJames Smart * cycles extracting it from ERSPs and stamping it in the 1402e399441dSJames Smart * cases where the transport fabricates CQEs on successful 1403e399441dSJames Smart * completions. 1404e399441dSJames Smart * 2) The FC-NVME implementation requires that delivery of 1405e399441dSJames Smart * ERSP completions are to go back to the nvme layer in order 1406e399441dSJames Smart * relative to the rsn, such that the sqhd value will always 1407e399441dSJames Smart * be "in order" for the nvme layer. As the nvme layer in 1408e399441dSJames Smart * linux doesn't care about sqhd, there's no need to return 1409e399441dSJames Smart * them in order. 1410e399441dSJames Smart * 1411e399441dSJames Smart * Additionally: 1412e399441dSJames Smart * As the core nvme layer in linux currently does not look at 1413e399441dSJames Smart * every field in the cqe - in cases where the FC transport must 1414e399441dSJames Smart * fabricate a CQE, the following fields will not be set as they 1415e399441dSJames Smart * are not referenced: 1416e399441dSJames Smart * cqe.sqid, cqe.sqhd, cqe.command_id 1417f874d5d0SJames Smart * 1418f874d5d0SJames Smart * Failure or error of an individual i/o, in a transport 1419f874d5d0SJames Smart * detected fashion unrelated to the nvme completion status, 1420f874d5d0SJames Smart * potentially cause the initiator and target sides to get out 1421f874d5d0SJames Smart * of sync on SQ head/tail (aka outstanding io count allowed). 1422f874d5d0SJames Smart * Per FC-NVME spec, failure of an individual command requires 1423f874d5d0SJames Smart * the connection to be terminated, which in turn requires the 1424f874d5d0SJames Smart * association to be terminated. 1425e399441dSJames Smart */ 1426e399441dSJames Smart 1427e399441dSJames Smart fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, 1428e399441dSJames Smart sizeof(op->rsp_iu), DMA_FROM_DEVICE); 1429e399441dSJames Smart 14300a02e39fSJames Smart if (atomic_read(&op->state) == FCPOP_STATE_ABORTED || 14310a02e39fSJames Smart op->flags & FCOP_FLAGS_TERMIO) 14320a02e39fSJames Smart status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); 143362eeacb0SJames Smart else if (freq->status) 143456b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1435e399441dSJames Smart 1436e399441dSJames Smart /* 1437e399441dSJames Smart * For the linux implementation, if we have an unsuccesful 1438e399441dSJames Smart * status, they blk-mq layer can typically be called with the 1439e399441dSJames Smart * non-zero status and the content of the cqe isn't important. 1440e399441dSJames Smart */ 1441e399441dSJames Smart if (status) 1442e399441dSJames Smart goto done; 1443e399441dSJames Smart 1444e399441dSJames Smart /* 1445e399441dSJames Smart * command completed successfully relative to the wire 1446e399441dSJames Smart * protocol. However, validate anything received and 1447e399441dSJames Smart * extract the status and result from the cqe (create it 1448e399441dSJames Smart * where necessary). 1449e399441dSJames Smart */ 1450e399441dSJames Smart 1451e399441dSJames Smart switch (freq->rcv_rsplen) { 1452e399441dSJames Smart 1453e399441dSJames Smart case 0: 1454e399441dSJames Smart case NVME_FC_SIZEOF_ZEROS_RSP: 1455e399441dSJames Smart /* 1456e399441dSJames Smart * No response payload or 12 bytes of payload (which 1457e399441dSJames Smart * should all be zeros) are considered successful and 1458e399441dSJames Smart * no payload in the CQE by the transport. 1459e399441dSJames Smart */ 1460e399441dSJames Smart if (freq->transferred_length != 1461e399441dSJames Smart be32_to_cpu(op->cmd_iu.data_len)) { 146256b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1463e399441dSJames Smart goto done; 1464e399441dSJames Smart } 146527fa9bc5SChristoph Hellwig result.u64 = 0; 1466e399441dSJames Smart break; 1467e399441dSJames Smart 1468e399441dSJames Smart case sizeof(struct nvme_fc_ersp_iu): 1469e399441dSJames Smart /* 1470e399441dSJames Smart * The ERSP IU contains a full completion with CQE. 1471e399441dSJames Smart * Validate ERSP IU and look at cqe. 1472e399441dSJames Smart */ 1473e399441dSJames Smart if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != 1474e399441dSJames Smart (freq->rcv_rsplen / 4) || 1475e399441dSJames Smart be32_to_cpu(op->rsp_iu.xfrd_len) != 1476e399441dSJames Smart freq->transferred_length || 1477726a1080SJames Smart op->rsp_iu.status_code || 1478458f280dSJames Smart sqe->common.command_id != cqe->command_id)) { 147956b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1480e399441dSJames Smart goto done; 1481e399441dSJames Smart } 148227fa9bc5SChristoph Hellwig result = cqe->result; 1483d663b69fSChristoph Hellwig status = cqe->status; 1484e399441dSJames Smart break; 1485e399441dSJames Smart 1486e399441dSJames Smart default: 148756b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1488e399441dSJames Smart goto done; 1489e399441dSJames Smart } 1490e399441dSJames Smart 1491f874d5d0SJames Smart terminate_assoc = false; 1492f874d5d0SJames Smart 1493e399441dSJames Smart done: 149478a7ac26SJames Smart if (op->flags & FCOP_FLAGS_AEN) { 149527fa9bc5SChristoph Hellwig nvme_complete_async_event(&queue->ctrl->ctrl, status, &result); 14960a02e39fSJames Smart __nvme_fc_fcpop_chk_teardowns(ctrl, op); 149778a7ac26SJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 149878a7ac26SJames Smart op->flags = FCOP_FLAGS_AEN; /* clear other flags */ 1499e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 1500f874d5d0SJames Smart goto check_error; 1501e399441dSJames Smart } 1502e399441dSJames Smart 15030a02e39fSJames Smart /* 15040a02e39fSJames Smart * Force failures of commands if we're killing the controller 15050a02e39fSJames Smart * or have an error on a command used to create an new association 15060a02e39fSJames Smart */ 15070a02e39fSJames Smart if (status && 15080a02e39fSJames Smart (blk_queue_dying(rq->q) || 15090a02e39fSJames Smart ctrl->ctrl.state == NVME_CTRL_NEW || 15100a02e39fSJames Smart ctrl->ctrl.state == NVME_CTRL_RECONNECTING)) 1511e392e1f1SJames Smart status |= cpu_to_le16(NVME_SC_DNR << 1); 15120a02e39fSJames Smart 15130a02e39fSJames Smart if (__nvme_fc_fcpop_chk_teardowns(ctrl, op)) 151478a7ac26SJames Smart __nvme_fc_final_op_cleanup(rq); 15150a02e39fSJames Smart else 15160a02e39fSJames Smart nvme_end_request(rq, status, result); 1517f874d5d0SJames Smart 1518f874d5d0SJames Smart check_error: 1519f874d5d0SJames Smart if (terminate_assoc) 1520f874d5d0SJames Smart nvme_fc_error_recovery(ctrl, "transport detected io error"); 1521e399441dSJames Smart } 1522e399441dSJames Smart 1523e399441dSJames Smart static int 1524e399441dSJames Smart __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, 1525e399441dSJames Smart struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, 1526e399441dSJames Smart struct request *rq, u32 rqno) 1527e399441dSJames Smart { 1528e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 1529e399441dSJames Smart int ret = 0; 1530e399441dSJames Smart 1531e399441dSJames Smart memset(op, 0, sizeof(*op)); 1532e399441dSJames Smart op->fcp_req.cmdaddr = &op->cmd_iu; 1533e399441dSJames Smart op->fcp_req.cmdlen = sizeof(op->cmd_iu); 1534e399441dSJames Smart op->fcp_req.rspaddr = &op->rsp_iu; 1535e399441dSJames Smart op->fcp_req.rsplen = sizeof(op->rsp_iu); 1536e399441dSJames Smart op->fcp_req.done = nvme_fc_fcpio_done; 1537e399441dSJames Smart op->fcp_req.first_sgl = (struct scatterlist *)&op[1]; 1538e399441dSJames Smart op->fcp_req.private = &op->fcp_req.first_sgl[SG_CHUNK_SIZE]; 1539e399441dSJames Smart op->ctrl = ctrl; 1540e399441dSJames Smart op->queue = queue; 1541e399441dSJames Smart op->rq = rq; 1542e399441dSJames Smart op->rqno = rqno; 1543e399441dSJames Smart 1544e399441dSJames Smart cmdiu->scsi_id = NVME_CMD_SCSI_ID; 1545e399441dSJames Smart cmdiu->fc_id = NVME_CMD_FC_ID; 1546e399441dSJames Smart cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); 1547e399441dSJames Smart 1548e399441dSJames Smart op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, 1549e399441dSJames Smart &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); 1550e399441dSJames Smart if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { 1551e399441dSJames Smart dev_err(ctrl->dev, 1552e399441dSJames Smart "FCP Op failed - cmdiu dma mapping failed.\n"); 1553e399441dSJames Smart ret = EFAULT; 1554e399441dSJames Smart goto out_on_error; 1555e399441dSJames Smart } 1556e399441dSJames Smart 1557e399441dSJames Smart op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, 1558e399441dSJames Smart &op->rsp_iu, sizeof(op->rsp_iu), 1559e399441dSJames Smart DMA_FROM_DEVICE); 1560e399441dSJames Smart if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { 1561e399441dSJames Smart dev_err(ctrl->dev, 1562e399441dSJames Smart "FCP Op failed - rspiu dma mapping failed.\n"); 1563e399441dSJames Smart ret = EFAULT; 1564e399441dSJames Smart } 1565e399441dSJames Smart 1566e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 1567e399441dSJames Smart out_on_error: 1568e399441dSJames Smart return ret; 1569e399441dSJames Smart } 1570e399441dSJames Smart 1571e399441dSJames Smart static int 1572d6296d39SChristoph Hellwig nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, 1573d6296d39SChristoph Hellwig unsigned int hctx_idx, unsigned int numa_node) 1574e399441dSJames Smart { 1575d6296d39SChristoph Hellwig struct nvme_fc_ctrl *ctrl = set->driver_data; 1576e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 157776f983cbSChristoph Hellwig int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; 157876f983cbSChristoph Hellwig struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; 1579e399441dSJames Smart 1580e399441dSJames Smart return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++); 1581e399441dSJames Smart } 1582e399441dSJames Smart 1583e399441dSJames Smart static int 1584e399441dSJames Smart nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) 1585e399441dSJames Smart { 1586e399441dSJames Smart struct nvme_fc_fcp_op *aen_op; 1587e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu; 1588e399441dSJames Smart struct nvme_command *sqe; 158961bff8efSJames Smart void *private; 1590e399441dSJames Smart int i, ret; 1591e399441dSJames Smart 1592e399441dSJames Smart aen_op = ctrl->aen_ops; 1593e399441dSJames Smart for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { 159461bff8efSJames Smart private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz, 159561bff8efSJames Smart GFP_KERNEL); 159661bff8efSJames Smart if (!private) 159761bff8efSJames Smart return -ENOMEM; 159861bff8efSJames Smart 1599e399441dSJames Smart cmdiu = &aen_op->cmd_iu; 1600e399441dSJames Smart sqe = &cmdiu->sqe; 1601e399441dSJames Smart ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], 1602e399441dSJames Smart aen_op, (struct request *)NULL, 1603e399441dSJames Smart (AEN_CMDID_BASE + i)); 160461bff8efSJames Smart if (ret) { 160561bff8efSJames Smart kfree(private); 1606e399441dSJames Smart return ret; 160761bff8efSJames Smart } 1608e399441dSJames Smart 160978a7ac26SJames Smart aen_op->flags = FCOP_FLAGS_AEN; 161061bff8efSJames Smart aen_op->fcp_req.first_sgl = NULL; /* no sg list */ 161161bff8efSJames Smart aen_op->fcp_req.private = private; 161278a7ac26SJames Smart 1613e399441dSJames Smart memset(sqe, 0, sizeof(*sqe)); 1614e399441dSJames Smart sqe->common.opcode = nvme_admin_async_event; 161578a7ac26SJames Smart /* Note: core layer may overwrite the sqe.command_id value */ 1616e399441dSJames Smart sqe->common.command_id = AEN_CMDID_BASE + i; 1617e399441dSJames Smart } 1618e399441dSJames Smart return 0; 1619e399441dSJames Smart } 1620e399441dSJames Smart 162161bff8efSJames Smart static void 162261bff8efSJames Smart nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl) 162361bff8efSJames Smart { 162461bff8efSJames Smart struct nvme_fc_fcp_op *aen_op; 162561bff8efSJames Smart int i; 162661bff8efSJames Smart 162761bff8efSJames Smart aen_op = ctrl->aen_ops; 162861bff8efSJames Smart for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { 162961bff8efSJames Smart if (!aen_op->fcp_req.private) 163061bff8efSJames Smart continue; 163161bff8efSJames Smart 163261bff8efSJames Smart __nvme_fc_exit_request(ctrl, aen_op); 163361bff8efSJames Smart 163461bff8efSJames Smart kfree(aen_op->fcp_req.private); 163561bff8efSJames Smart aen_op->fcp_req.private = NULL; 163661bff8efSJames Smart } 163761bff8efSJames Smart } 1638e399441dSJames Smart 1639e399441dSJames Smart static inline void 1640e399441dSJames Smart __nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, 1641e399441dSJames Smart unsigned int qidx) 1642e399441dSJames Smart { 1643e399441dSJames Smart struct nvme_fc_queue *queue = &ctrl->queues[qidx]; 1644e399441dSJames Smart 1645e399441dSJames Smart hctx->driver_data = queue; 1646e399441dSJames Smart queue->hctx = hctx; 1647e399441dSJames Smart } 1648e399441dSJames Smart 1649e399441dSJames Smart static int 1650e399441dSJames Smart nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 1651e399441dSJames Smart unsigned int hctx_idx) 1652e399441dSJames Smart { 1653e399441dSJames Smart struct nvme_fc_ctrl *ctrl = data; 1654e399441dSJames Smart 1655e399441dSJames Smart __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); 1656e399441dSJames Smart 1657e399441dSJames Smart return 0; 1658e399441dSJames Smart } 1659e399441dSJames Smart 1660e399441dSJames Smart static int 1661e399441dSJames Smart nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, 1662e399441dSJames Smart unsigned int hctx_idx) 1663e399441dSJames Smart { 1664e399441dSJames Smart struct nvme_fc_ctrl *ctrl = data; 1665e399441dSJames Smart 1666e399441dSJames Smart __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); 1667e399441dSJames Smart 1668e399441dSJames Smart return 0; 1669e399441dSJames Smart } 1670e399441dSJames Smart 1671e399441dSJames Smart static void 1672e399441dSJames Smart nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx, size_t queue_size) 1673e399441dSJames Smart { 1674e399441dSJames Smart struct nvme_fc_queue *queue; 1675e399441dSJames Smart 1676e399441dSJames Smart queue = &ctrl->queues[idx]; 1677e399441dSJames Smart memset(queue, 0, sizeof(*queue)); 1678e399441dSJames Smart queue->ctrl = ctrl; 1679e399441dSJames Smart queue->qnum = idx; 1680e399441dSJames Smart atomic_set(&queue->csn, 1); 1681e399441dSJames Smart queue->dev = ctrl->dev; 1682e399441dSJames Smart 1683e399441dSJames Smart if (idx > 0) 1684e399441dSJames Smart queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; 1685e399441dSJames Smart else 1686e399441dSJames Smart queue->cmnd_capsule_len = sizeof(struct nvme_command); 1687e399441dSJames Smart 1688e399441dSJames Smart queue->queue_size = queue_size; 1689e399441dSJames Smart 1690e399441dSJames Smart /* 1691e399441dSJames Smart * Considered whether we should allocate buffers for all SQEs 1692e399441dSJames Smart * and CQEs and dma map them - mapping their respective entries 1693e399441dSJames Smart * into the request structures (kernel vm addr and dma address) 1694e399441dSJames Smart * thus the driver could use the buffers/mappings directly. 1695e399441dSJames Smart * It only makes sense if the LLDD would use them for its 1696e399441dSJames Smart * messaging api. It's very unlikely most adapter api's would use 1697e399441dSJames Smart * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload 1698e399441dSJames Smart * structures were used instead. 1699e399441dSJames Smart */ 1700e399441dSJames Smart } 1701e399441dSJames Smart 1702e399441dSJames Smart /* 1703e399441dSJames Smart * This routine terminates a queue at the transport level. 1704e399441dSJames Smart * The transport has already ensured that all outstanding ios on 1705e399441dSJames Smart * the queue have been terminated. 1706e399441dSJames Smart * The transport will send a Disconnect LS request to terminate 1707e399441dSJames Smart * the queue's connection. Termination of the admin queue will also 1708e399441dSJames Smart * terminate the association at the target. 1709e399441dSJames Smart */ 1710e399441dSJames Smart static void 1711e399441dSJames Smart nvme_fc_free_queue(struct nvme_fc_queue *queue) 1712e399441dSJames Smart { 1713e399441dSJames Smart if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) 1714e399441dSJames Smart return; 1715e399441dSJames Smart 1716e399441dSJames Smart /* 1717e399441dSJames Smart * Current implementation never disconnects a single queue. 1718e399441dSJames Smart * It always terminates a whole association. So there is never 1719e399441dSJames Smart * a disconnect(queue) LS sent to the target. 1720e399441dSJames Smart */ 1721e399441dSJames Smart 1722e399441dSJames Smart queue->connection_id = 0; 1723e399441dSJames Smart clear_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1724e399441dSJames Smart } 1725e399441dSJames Smart 1726e399441dSJames Smart static void 1727e399441dSJames Smart __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, 1728e399441dSJames Smart struct nvme_fc_queue *queue, unsigned int qidx) 1729e399441dSJames Smart { 1730e399441dSJames Smart if (ctrl->lport->ops->delete_queue) 1731e399441dSJames Smart ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, 1732e399441dSJames Smart queue->lldd_handle); 1733e399441dSJames Smart queue->lldd_handle = NULL; 1734e399441dSJames Smart } 1735e399441dSJames Smart 1736e399441dSJames Smart static void 1737e399441dSJames Smart nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) 1738e399441dSJames Smart { 1739e399441dSJames Smart int i; 1740e399441dSJames Smart 1741d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) 1742e399441dSJames Smart nvme_fc_free_queue(&ctrl->queues[i]); 1743e399441dSJames Smart } 1744e399441dSJames Smart 1745e399441dSJames Smart static int 1746e399441dSJames Smart __nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, 1747e399441dSJames Smart struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) 1748e399441dSJames Smart { 1749e399441dSJames Smart int ret = 0; 1750e399441dSJames Smart 1751e399441dSJames Smart queue->lldd_handle = NULL; 1752e399441dSJames Smart if (ctrl->lport->ops->create_queue) 1753e399441dSJames Smart ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, 1754e399441dSJames Smart qidx, qsize, &queue->lldd_handle); 1755e399441dSJames Smart 1756e399441dSJames Smart return ret; 1757e399441dSJames Smart } 1758e399441dSJames Smart 1759e399441dSJames Smart static void 1760e399441dSJames Smart nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) 1761e399441dSJames Smart { 1762d858e5f0SSagi Grimberg struct nvme_fc_queue *queue = &ctrl->queues[ctrl->ctrl.queue_count - 1]; 1763e399441dSJames Smart int i; 1764e399441dSJames Smart 1765d858e5f0SSagi Grimberg for (i = ctrl->ctrl.queue_count - 1; i >= 1; i--, queue--) 1766e399441dSJames Smart __nvme_fc_delete_hw_queue(ctrl, queue, i); 1767e399441dSJames Smart } 1768e399441dSJames Smart 1769e399441dSJames Smart static int 1770e399441dSJames Smart nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) 1771e399441dSJames Smart { 1772e399441dSJames Smart struct nvme_fc_queue *queue = &ctrl->queues[1]; 177317a1ec08SJohannes Thumshirn int i, ret; 1774e399441dSJames Smart 1775d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++, queue++) { 1776e399441dSJames Smart ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); 177717a1ec08SJohannes Thumshirn if (ret) 177817a1ec08SJohannes Thumshirn goto delete_queues; 1779e399441dSJames Smart } 1780e399441dSJames Smart 1781e399441dSJames Smart return 0; 178217a1ec08SJohannes Thumshirn 178317a1ec08SJohannes Thumshirn delete_queues: 178417a1ec08SJohannes Thumshirn for (; i >= 0; i--) 178517a1ec08SJohannes Thumshirn __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[i], i); 178617a1ec08SJohannes Thumshirn return ret; 1787e399441dSJames Smart } 1788e399441dSJames Smart 1789e399441dSJames Smart static int 1790e399441dSJames Smart nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) 1791e399441dSJames Smart { 1792e399441dSJames Smart int i, ret = 0; 1793e399441dSJames Smart 1794d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) { 1795e399441dSJames Smart ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, 1796e399441dSJames Smart (qsize / 5)); 1797e399441dSJames Smart if (ret) 1798e399441dSJames Smart break; 1799e399441dSJames Smart ret = nvmf_connect_io_queue(&ctrl->ctrl, i); 1800e399441dSJames Smart if (ret) 1801e399441dSJames Smart break; 1802e399441dSJames Smart } 1803e399441dSJames Smart 1804e399441dSJames Smart return ret; 1805e399441dSJames Smart } 1806e399441dSJames Smart 1807e399441dSJames Smart static void 1808e399441dSJames Smart nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) 1809e399441dSJames Smart { 1810e399441dSJames Smart int i; 1811e399441dSJames Smart 1812d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) 1813e399441dSJames Smart nvme_fc_init_queue(ctrl, i, ctrl->ctrl.sqsize); 1814e399441dSJames Smart } 1815e399441dSJames Smart 1816e399441dSJames Smart static void 1817e399441dSJames Smart nvme_fc_ctrl_free(struct kref *ref) 1818e399441dSJames Smart { 1819e399441dSJames Smart struct nvme_fc_ctrl *ctrl = 1820e399441dSJames Smart container_of(ref, struct nvme_fc_ctrl, ref); 1821e399441dSJames Smart unsigned long flags; 1822e399441dSJames Smart 182361bff8efSJames Smart if (ctrl->ctrl.tagset) { 182461bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.connect_q); 182561bff8efSJames Smart blk_mq_free_tag_set(&ctrl->tag_set); 182661bff8efSJames Smart } 182761bff8efSJames Smart 1828e399441dSJames Smart /* remove from rport list */ 1829e399441dSJames Smart spin_lock_irqsave(&ctrl->rport->lock, flags); 1830e399441dSJames Smart list_del(&ctrl->ctrl_list); 1831e399441dSJames Smart spin_unlock_irqrestore(&ctrl->rport->lock, flags); 183261bff8efSJames Smart 1833f9c5af5fSSagi Grimberg blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 183461bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.admin_q); 183561bff8efSJames Smart blk_mq_free_tag_set(&ctrl->admin_tag_set); 183661bff8efSJames Smart 183761bff8efSJames Smart kfree(ctrl->queues); 1838e399441dSJames Smart 1839e399441dSJames Smart put_device(ctrl->dev); 1840e399441dSJames Smart nvme_fc_rport_put(ctrl->rport); 1841e399441dSJames Smart 1842e399441dSJames Smart ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); 1843de41447aSEwan D. Milne if (ctrl->ctrl.opts) 1844e399441dSJames Smart nvmf_free_options(ctrl->ctrl.opts); 1845e399441dSJames Smart kfree(ctrl); 1846e399441dSJames Smart } 1847e399441dSJames Smart 1848e399441dSJames Smart static void 1849e399441dSJames Smart nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) 1850e399441dSJames Smart { 1851e399441dSJames Smart kref_put(&ctrl->ref, nvme_fc_ctrl_free); 1852e399441dSJames Smart } 1853e399441dSJames Smart 1854e399441dSJames Smart static int 1855e399441dSJames Smart nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) 1856e399441dSJames Smart { 1857e399441dSJames Smart return kref_get_unless_zero(&ctrl->ref); 1858e399441dSJames Smart } 1859e399441dSJames Smart 1860e399441dSJames Smart /* 1861e399441dSJames Smart * All accesses from nvme core layer done - can now free the 1862e399441dSJames Smart * controller. Called after last nvme_put_ctrl() call 1863e399441dSJames Smart */ 1864e399441dSJames Smart static void 186561bff8efSJames Smart nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl) 1866e399441dSJames Smart { 1867e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 1868e399441dSJames Smart 1869e399441dSJames Smart WARN_ON(nctrl != &ctrl->ctrl); 1870e399441dSJames Smart 1871e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 1872e399441dSJames Smart } 1873e399441dSJames Smart 187461bff8efSJames Smart static void 187561bff8efSJames Smart nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) 187661bff8efSJames Smart { 187769fa9646SJames Smart /* only proceed if in LIVE state - e.g. on first error */ 187869fa9646SJames Smart if (ctrl->ctrl.state != NVME_CTRL_LIVE) 187969fa9646SJames Smart return; 188069fa9646SJames Smart 188161bff8efSJames Smart dev_warn(ctrl->ctrl.device, 188261bff8efSJames Smart "NVME-FC{%d}: transport association error detected: %s\n", 188361bff8efSJames Smart ctrl->cnum, errmsg); 1884589ff775SJames Smart dev_warn(ctrl->ctrl.device, 188561bff8efSJames Smart "NVME-FC{%d}: resetting controller\n", ctrl->cnum); 188661bff8efSJames Smart 188761bff8efSJames Smart if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RECONNECTING)) { 188861bff8efSJames Smart dev_err(ctrl->ctrl.device, 188961bff8efSJames Smart "NVME-FC{%d}: error_recovery: Couldn't change state " 189061bff8efSJames Smart "to RECONNECTING\n", ctrl->cnum); 189161bff8efSJames Smart return; 189261bff8efSJames Smart } 189361bff8efSJames Smart 1894d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&ctrl->ctrl); 189561bff8efSJames Smart } 189661bff8efSJames Smart 1897baee29acSChristoph Hellwig static enum blk_eh_timer_return 1898e399441dSJames Smart nvme_fc_timeout(struct request *rq, bool reserved) 1899e399441dSJames Smart { 1900e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1901e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 1902e399441dSJames Smart int ret; 1903e399441dSJames Smart 1904134aedc9SJames Smart if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE || 1905134aedc9SJames Smart atomic_read(&op->state) == FCPOP_STATE_ABORTED) 1906e399441dSJames Smart return BLK_EH_RESET_TIMER; 1907e399441dSJames Smart 1908e399441dSJames Smart ret = __nvme_fc_abort_op(ctrl, op); 1909e399441dSJames Smart if (ret) 1910134aedc9SJames Smart /* io wasn't active to abort */ 1911134aedc9SJames Smart return BLK_EH_NOT_HANDLED; 1912e399441dSJames Smart 1913e399441dSJames Smart /* 191461bff8efSJames Smart * we can't individually ABTS an io without affecting the queue, 191561bff8efSJames Smart * thus killing the queue, adn thus the association. 191661bff8efSJames Smart * So resolve by performing a controller reset, which will stop 191761bff8efSJames Smart * the host/io stack, terminate the association on the link, 191861bff8efSJames Smart * and recreate an association on the link. 1919e399441dSJames Smart */ 192061bff8efSJames Smart nvme_fc_error_recovery(ctrl, "io timeout error"); 1921e399441dSJames Smart 1922134aedc9SJames Smart /* 1923134aedc9SJames Smart * the io abort has been initiated. Have the reset timer 1924134aedc9SJames Smart * restarted and the abort completion will complete the io 1925134aedc9SJames Smart * shortly. Avoids a synchronous wait while the abort finishes. 1926134aedc9SJames Smart */ 1927134aedc9SJames Smart return BLK_EH_RESET_TIMER; 1928e399441dSJames Smart } 1929e399441dSJames Smart 1930e399441dSJames Smart static int 1931e399441dSJames Smart nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, 1932e399441dSJames Smart struct nvme_fc_fcp_op *op) 1933e399441dSJames Smart { 1934e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 1935e399441dSJames Smart enum dma_data_direction dir; 1936e399441dSJames Smart int ret; 1937e399441dSJames Smart 1938e399441dSJames Smart freq->sg_cnt = 0; 1939e399441dSJames Smart 1940b131c61dSChristoph Hellwig if (!blk_rq_payload_bytes(rq)) 1941e399441dSJames Smart return 0; 1942e399441dSJames Smart 1943e399441dSJames Smart freq->sg_table.sgl = freq->first_sgl; 194419e420bbSChristoph Hellwig ret = sg_alloc_table_chained(&freq->sg_table, 194519e420bbSChristoph Hellwig blk_rq_nr_phys_segments(rq), freq->sg_table.sgl); 1946e399441dSJames Smart if (ret) 1947e399441dSJames Smart return -ENOMEM; 1948e399441dSJames Smart 1949e399441dSJames Smart op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); 195019e420bbSChristoph Hellwig WARN_ON(op->nents > blk_rq_nr_phys_segments(rq)); 1951e399441dSJames Smart dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 1952e399441dSJames Smart freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, 1953e399441dSJames Smart op->nents, dir); 1954e399441dSJames Smart if (unlikely(freq->sg_cnt <= 0)) { 1955e399441dSJames Smart sg_free_table_chained(&freq->sg_table, true); 1956e399441dSJames Smart freq->sg_cnt = 0; 1957e399441dSJames Smart return -EFAULT; 1958e399441dSJames Smart } 1959e399441dSJames Smart 1960e399441dSJames Smart /* 1961e399441dSJames Smart * TODO: blk_integrity_rq(rq) for DIF 1962e399441dSJames Smart */ 1963e399441dSJames Smart return 0; 1964e399441dSJames Smart } 1965e399441dSJames Smart 1966e399441dSJames Smart static void 1967e399441dSJames Smart nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, 1968e399441dSJames Smart struct nvme_fc_fcp_op *op) 1969e399441dSJames Smart { 1970e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 1971e399441dSJames Smart 1972e399441dSJames Smart if (!freq->sg_cnt) 1973e399441dSJames Smart return; 1974e399441dSJames Smart 1975e399441dSJames Smart fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, 1976e399441dSJames Smart ((rq_data_dir(rq) == WRITE) ? 1977e399441dSJames Smart DMA_TO_DEVICE : DMA_FROM_DEVICE)); 1978e399441dSJames Smart 1979e399441dSJames Smart nvme_cleanup_cmd(rq); 1980e399441dSJames Smart 1981e399441dSJames Smart sg_free_table_chained(&freq->sg_table, true); 1982e399441dSJames Smart 1983e399441dSJames Smart freq->sg_cnt = 0; 1984e399441dSJames Smart } 1985e399441dSJames Smart 1986e399441dSJames Smart /* 1987e399441dSJames Smart * In FC, the queue is a logical thing. At transport connect, the target 1988e399441dSJames Smart * creates its "queue" and returns a handle that is to be given to the 1989e399441dSJames Smart * target whenever it posts something to the corresponding SQ. When an 1990e399441dSJames Smart * SQE is sent on a SQ, FC effectively considers the SQE, or rather the 1991e399441dSJames Smart * command contained within the SQE, an io, and assigns a FC exchange 1992e399441dSJames Smart * to it. The SQE and the associated SQ handle are sent in the initial 1993e399441dSJames Smart * CMD IU sents on the exchange. All transfers relative to the io occur 1994e399441dSJames Smart * as part of the exchange. The CQE is the last thing for the io, 1995e399441dSJames Smart * which is transferred (explicitly or implicitly) with the RSP IU 1996e399441dSJames Smart * sent on the exchange. After the CQE is received, the FC exchange is 1997e399441dSJames Smart * terminaed and the Exchange may be used on a different io. 1998e399441dSJames Smart * 1999e399441dSJames Smart * The transport to LLDD api has the transport making a request for a 2000e399441dSJames Smart * new fcp io request to the LLDD. The LLDD then allocates a FC exchange 2001e399441dSJames Smart * resource and transfers the command. The LLDD will then process all 2002e399441dSJames Smart * steps to complete the io. Upon completion, the transport done routine 2003e399441dSJames Smart * is called. 2004e399441dSJames Smart * 2005e399441dSJames Smart * So - while the operation is outstanding to the LLDD, there is a link 2006e399441dSJames Smart * level FC exchange resource that is also outstanding. This must be 2007e399441dSJames Smart * considered in all cleanup operations. 2008e399441dSJames Smart */ 2009fc17b653SChristoph Hellwig static blk_status_t 2010e399441dSJames Smart nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, 2011e399441dSJames Smart struct nvme_fc_fcp_op *op, u32 data_len, 2012e399441dSJames Smart enum nvmefc_fcp_datadir io_dir) 2013e399441dSJames Smart { 2014e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 2015e399441dSJames Smart struct nvme_command *sqe = &cmdiu->sqe; 2016e399441dSJames Smart u32 csn; 2017e399441dSJames Smart int ret; 2018e399441dSJames Smart 201961bff8efSJames Smart /* 202061bff8efSJames Smart * before attempting to send the io, check to see if we believe 202161bff8efSJames Smart * the target device is present 202261bff8efSJames Smart */ 202361bff8efSJames Smart if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 20248b25f351SJames Smart goto busy; 202561bff8efSJames Smart 2026e399441dSJames Smart if (!nvme_fc_ctrl_get(ctrl)) 2027fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2028e399441dSJames Smart 2029e399441dSJames Smart /* format the FC-NVME CMD IU and fcp_req */ 2030e399441dSJames Smart cmdiu->connection_id = cpu_to_be64(queue->connection_id); 2031e399441dSJames Smart csn = atomic_inc_return(&queue->csn); 2032e399441dSJames Smart cmdiu->csn = cpu_to_be32(csn); 2033e399441dSJames Smart cmdiu->data_len = cpu_to_be32(data_len); 2034e399441dSJames Smart switch (io_dir) { 2035e399441dSJames Smart case NVMEFC_FCP_WRITE: 2036e399441dSJames Smart cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; 2037e399441dSJames Smart break; 2038e399441dSJames Smart case NVMEFC_FCP_READ: 2039e399441dSJames Smart cmdiu->flags = FCNVME_CMD_FLAGS_READ; 2040e399441dSJames Smart break; 2041e399441dSJames Smart case NVMEFC_FCP_NODATA: 2042e399441dSJames Smart cmdiu->flags = 0; 2043e399441dSJames Smart break; 2044e399441dSJames Smart } 2045e399441dSJames Smart op->fcp_req.payload_length = data_len; 2046e399441dSJames Smart op->fcp_req.io_dir = io_dir; 2047e399441dSJames Smart op->fcp_req.transferred_length = 0; 2048e399441dSJames Smart op->fcp_req.rcv_rsplen = 0; 204962eeacb0SJames Smart op->fcp_req.status = NVME_SC_SUCCESS; 2050e399441dSJames Smart op->fcp_req.sqid = cpu_to_le16(queue->qnum); 2051e399441dSJames Smart 2052e399441dSJames Smart /* 2053e399441dSJames Smart * validate per fabric rules, set fields mandated by fabric spec 2054e399441dSJames Smart * as well as those by FC-NVME spec. 2055e399441dSJames Smart */ 2056e399441dSJames Smart WARN_ON_ONCE(sqe->common.metadata); 2057e399441dSJames Smart sqe->common.flags |= NVME_CMD_SGL_METABUF; 2058e399441dSJames Smart 2059e399441dSJames Smart /* 2060d9d34c0bSJames Smart * format SQE DPTR field per FC-NVME rules: 2061d9d34c0bSJames Smart * type=0x5 Transport SGL Data Block Descriptor 2062d9d34c0bSJames Smart * subtype=0xA Transport-specific value 2063d9d34c0bSJames Smart * address=0 2064d9d34c0bSJames Smart * length=length of the data series 2065e399441dSJames Smart */ 2066d9d34c0bSJames Smart sqe->rw.dptr.sgl.type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 2067d9d34c0bSJames Smart NVME_SGL_FMT_TRANSPORT_A; 2068e399441dSJames Smart sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); 2069e399441dSJames Smart sqe->rw.dptr.sgl.addr = 0; 2070e399441dSJames Smart 207178a7ac26SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) { 2072e399441dSJames Smart ret = nvme_fc_map_data(ctrl, op->rq, op); 2073e399441dSJames Smart if (ret < 0) { 2074e399441dSJames Smart nvme_cleanup_cmd(op->rq); 2075e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2076fc17b653SChristoph Hellwig if (ret == -ENOMEM || ret == -EAGAIN) 2077fc17b653SChristoph Hellwig return BLK_STS_RESOURCE; 2078fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2079e399441dSJames Smart } 2080e399441dSJames Smart } 2081e399441dSJames Smart 2082e399441dSJames Smart fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, 2083e399441dSJames Smart sizeof(op->cmd_iu), DMA_TO_DEVICE); 2084e399441dSJames Smart 2085e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_ACTIVE); 2086e399441dSJames Smart 208778a7ac26SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) 2088e399441dSJames Smart blk_mq_start_request(op->rq); 2089e399441dSJames Smart 2090e399441dSJames Smart ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, 2091e399441dSJames Smart &ctrl->rport->remoteport, 2092e399441dSJames Smart queue->lldd_handle, &op->fcp_req); 2093e399441dSJames Smart 2094e399441dSJames Smart if (ret) { 20958b25f351SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) 2096e399441dSJames Smart nvme_fc_unmap_data(ctrl, op->rq, op); 2097e399441dSJames Smart 2098e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2099e399441dSJames Smart 21008b25f351SJames Smart if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE && 21018b25f351SJames Smart ret != -EBUSY) 2102fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2103e399441dSJames Smart 21048b25f351SJames Smart goto busy; 2105e399441dSJames Smart } 2106e399441dSJames Smart 2107fc17b653SChristoph Hellwig return BLK_STS_OK; 21088b25f351SJames Smart 21098b25f351SJames Smart busy: 21108b25f351SJames Smart if (!(op->flags & FCOP_FLAGS_AEN) && queue->hctx) 21118b25f351SJames Smart blk_mq_delay_run_hw_queue(queue->hctx, NVMEFC_QUEUE_DELAY); 21128b25f351SJames Smart 21138b25f351SJames Smart return BLK_STS_RESOURCE; 2114e399441dSJames Smart } 2115e399441dSJames Smart 2116fc17b653SChristoph Hellwig static blk_status_t 2117e399441dSJames Smart nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, 2118e399441dSJames Smart const struct blk_mq_queue_data *bd) 2119e399441dSJames Smart { 2120e399441dSJames Smart struct nvme_ns *ns = hctx->queue->queuedata; 2121e399441dSJames Smart struct nvme_fc_queue *queue = hctx->driver_data; 2122e399441dSJames Smart struct nvme_fc_ctrl *ctrl = queue->ctrl; 2123e399441dSJames Smart struct request *rq = bd->rq; 2124e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2125e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 2126e399441dSJames Smart struct nvme_command *sqe = &cmdiu->sqe; 2127e399441dSJames Smart enum nvmefc_fcp_datadir io_dir; 2128e399441dSJames Smart u32 data_len; 2129fc17b653SChristoph Hellwig blk_status_t ret; 2130e399441dSJames Smart 2131e399441dSJames Smart ret = nvme_setup_cmd(ns, rq, sqe); 2132e399441dSJames Smart if (ret) 2133e399441dSJames Smart return ret; 2134e399441dSJames Smart 2135b131c61dSChristoph Hellwig data_len = blk_rq_payload_bytes(rq); 2136e399441dSJames Smart if (data_len) 2137e399441dSJames Smart io_dir = ((rq_data_dir(rq) == WRITE) ? 2138e399441dSJames Smart NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); 2139e399441dSJames Smart else 2140e399441dSJames Smart io_dir = NVMEFC_FCP_NODATA; 2141e399441dSJames Smart 2142e399441dSJames Smart return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); 2143e399441dSJames Smart } 2144e399441dSJames Smart 2145e399441dSJames Smart static struct blk_mq_tags * 2146e399441dSJames Smart nvme_fc_tagset(struct nvme_fc_queue *queue) 2147e399441dSJames Smart { 2148e399441dSJames Smart if (queue->qnum == 0) 2149e399441dSJames Smart return queue->ctrl->admin_tag_set.tags[queue->qnum]; 2150e399441dSJames Smart 2151e399441dSJames Smart return queue->ctrl->tag_set.tags[queue->qnum - 1]; 2152e399441dSJames Smart } 2153e399441dSJames Smart 2154e399441dSJames Smart static int 2155e399441dSJames Smart nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) 2156e399441dSJames Smart 2157e399441dSJames Smart { 2158e399441dSJames Smart struct nvme_fc_queue *queue = hctx->driver_data; 2159e399441dSJames Smart struct nvme_fc_ctrl *ctrl = queue->ctrl; 2160e399441dSJames Smart struct request *req; 2161e399441dSJames Smart struct nvme_fc_fcp_op *op; 2162e399441dSJames Smart 2163e399441dSJames Smart req = blk_mq_tag_to_rq(nvme_fc_tagset(queue), tag); 216461bff8efSJames Smart if (!req) 2165e399441dSJames Smart return 0; 2166e399441dSJames Smart 2167e399441dSJames Smart op = blk_mq_rq_to_pdu(req); 2168e399441dSJames Smart 2169e399441dSJames Smart if ((atomic_read(&op->state) == FCPOP_STATE_ACTIVE) && 2170e399441dSJames Smart (ctrl->lport->ops->poll_queue)) 2171e399441dSJames Smart ctrl->lport->ops->poll_queue(&ctrl->lport->localport, 2172e399441dSJames Smart queue->lldd_handle); 2173e399441dSJames Smart 2174e399441dSJames Smart return ((atomic_read(&op->state) != FCPOP_STATE_ACTIVE)); 2175e399441dSJames Smart } 2176e399441dSJames Smart 2177e399441dSJames Smart static void 2178e399441dSJames Smart nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx) 2179e399441dSJames Smart { 2180e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); 2181e399441dSJames Smart struct nvme_fc_fcp_op *aen_op; 218261bff8efSJames Smart unsigned long flags; 218361bff8efSJames Smart bool terminating = false; 2184fc17b653SChristoph Hellwig blk_status_t ret; 2185e399441dSJames Smart 2186e399441dSJames Smart if (aer_idx > NVME_FC_NR_AEN_COMMANDS) 2187e399441dSJames Smart return; 2188e399441dSJames Smart 218961bff8efSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 219061bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 219161bff8efSJames Smart terminating = true; 219261bff8efSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 219361bff8efSJames Smart 219461bff8efSJames Smart if (terminating) 219561bff8efSJames Smart return; 219661bff8efSJames Smart 2197e399441dSJames Smart aen_op = &ctrl->aen_ops[aer_idx]; 2198e399441dSJames Smart 2199e399441dSJames Smart ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, 2200e399441dSJames Smart NVMEFC_FCP_NODATA); 2201e399441dSJames Smart if (ret) 2202e399441dSJames Smart dev_err(ctrl->ctrl.device, 2203e399441dSJames Smart "failed async event work [%d]\n", aer_idx); 2204e399441dSJames Smart } 2205e399441dSJames Smart 2206e399441dSJames Smart static void 220778a7ac26SJames Smart __nvme_fc_final_op_cleanup(struct request *rq) 2208e399441dSJames Smart { 2209e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2210e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 2211e399441dSJames Smart 221278a7ac26SJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 221378a7ac26SJames Smart op->flags &= ~(FCOP_FLAGS_TERMIO | FCOP_FLAGS_RELEASED | 221478a7ac26SJames Smart FCOP_FLAGS_COMPLETE); 2215e399441dSJames Smart 2216e399441dSJames Smart nvme_fc_unmap_data(ctrl, rq, op); 221777f02a7aSChristoph Hellwig nvme_complete_rq(rq); 2218e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2219e399441dSJames Smart 2220e399441dSJames Smart } 2221e399441dSJames Smart 222278a7ac26SJames Smart static void 222378a7ac26SJames Smart nvme_fc_complete_rq(struct request *rq) 222478a7ac26SJames Smart { 222578a7ac26SJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 222678a7ac26SJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 222778a7ac26SJames Smart unsigned long flags; 222878a7ac26SJames Smart bool completed = false; 222978a7ac26SJames Smart 223078a7ac26SJames Smart /* 223178a7ac26SJames Smart * the core layer, on controller resets after calling 223278a7ac26SJames Smart * nvme_shutdown_ctrl(), calls complete_rq without our 223378a7ac26SJames Smart * calling blk_mq_complete_request(), thus there may still 223478a7ac26SJames Smart * be live i/o outstanding with the LLDD. Means transport has 223578a7ac26SJames Smart * to track complete calls vs fcpio_done calls to know what 223678a7ac26SJames Smart * path to take on completes and dones. 223778a7ac26SJames Smart */ 223878a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 223978a7ac26SJames Smart if (op->flags & FCOP_FLAGS_COMPLETE) 224078a7ac26SJames Smart completed = true; 224178a7ac26SJames Smart else 224278a7ac26SJames Smart op->flags |= FCOP_FLAGS_RELEASED; 224378a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 224478a7ac26SJames Smart 224578a7ac26SJames Smart if (completed) 224678a7ac26SJames Smart __nvme_fc_final_op_cleanup(rq); 224778a7ac26SJames Smart } 224878a7ac26SJames Smart 2249e399441dSJames Smart /* 2250e399441dSJames Smart * This routine is used by the transport when it needs to find active 2251e399441dSJames Smart * io on a queue that is to be terminated. The transport uses 2252e399441dSJames Smart * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke 2253e399441dSJames Smart * this routine to kill them on a 1 by 1 basis. 2254e399441dSJames Smart * 2255e399441dSJames Smart * As FC allocates FC exchange for each io, the transport must contact 2256e399441dSJames Smart * the LLDD to terminate the exchange, thus releasing the FC exchange. 2257e399441dSJames Smart * After terminating the exchange the LLDD will call the transport's 2258e399441dSJames Smart * normal io done path for the request, but it will have an aborted 2259e399441dSJames Smart * status. The done path will return the io request back to the block 2260e399441dSJames Smart * layer with an error status. 2261e399441dSJames Smart */ 2262e399441dSJames Smart static void 2263e399441dSJames Smart nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) 2264e399441dSJames Smart { 2265e399441dSJames Smart struct nvme_ctrl *nctrl = data; 2266e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 2267e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); 226878a7ac26SJames Smart unsigned long flags; 2269e399441dSJames Smart int status; 2270e399441dSJames Smart 2271e399441dSJames Smart if (!blk_mq_request_started(req)) 2272e399441dSJames Smart return; 2273e399441dSJames Smart 227478a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 227561bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 227661bff8efSJames Smart ctrl->iocnt++; 227778a7ac26SJames Smart op->flags |= FCOP_FLAGS_TERMIO; 227861bff8efSJames Smart } 227978a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 228078a7ac26SJames Smart 2281e399441dSJames Smart status = __nvme_fc_abort_op(ctrl, op); 228278a7ac26SJames Smart if (status) { 2283e399441dSJames Smart /* 228478a7ac26SJames Smart * if __nvme_fc_abort_op failed the io wasn't 228578a7ac26SJames Smart * active. Thus this call path is running in 228678a7ac26SJames Smart * parallel to the io complete. Treat as non-error. 2287e399441dSJames Smart */ 228878a7ac26SJames Smart 228978a7ac26SJames Smart /* back out the flags/counters */ 229078a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 229161bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 229261bff8efSJames Smart ctrl->iocnt--; 229378a7ac26SJames Smart op->flags &= ~FCOP_FLAGS_TERMIO; 229478a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 2295e399441dSJames Smart return; 2296e399441dSJames Smart } 229778a7ac26SJames Smart } 2298e399441dSJames Smart 2299e399441dSJames Smart 230061bff8efSJames Smart static const struct blk_mq_ops nvme_fc_mq_ops = { 230161bff8efSJames Smart .queue_rq = nvme_fc_queue_rq, 230261bff8efSJames Smart .complete = nvme_fc_complete_rq, 230361bff8efSJames Smart .init_request = nvme_fc_init_request, 230461bff8efSJames Smart .exit_request = nvme_fc_exit_request, 230561bff8efSJames Smart .init_hctx = nvme_fc_init_hctx, 230661bff8efSJames Smart .poll = nvme_fc_poll, 230761bff8efSJames Smart .timeout = nvme_fc_timeout, 2308e399441dSJames Smart }; 2309e399441dSJames Smart 2310e399441dSJames Smart static int 2311e399441dSJames Smart nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) 2312e399441dSJames Smart { 2313e399441dSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 23147314183dSSagi Grimberg unsigned int nr_io_queues; 2315e399441dSJames Smart int ret; 2316e399441dSJames Smart 23177314183dSSagi Grimberg nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), 23187314183dSSagi Grimberg ctrl->lport->ops->max_hw_queues); 23197314183dSSagi Grimberg ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); 2320e399441dSJames Smart if (ret) { 2321e399441dSJames Smart dev_info(ctrl->ctrl.device, 2322e399441dSJames Smart "set_queue_count failed: %d\n", ret); 2323e399441dSJames Smart return ret; 2324e399441dSJames Smart } 2325e399441dSJames Smart 23267314183dSSagi Grimberg ctrl->ctrl.queue_count = nr_io_queues + 1; 23277314183dSSagi Grimberg if (!nr_io_queues) 2328e399441dSJames Smart return 0; 2329e399441dSJames Smart 2330e399441dSJames Smart nvme_fc_init_io_queues(ctrl); 2331e399441dSJames Smart 2332e399441dSJames Smart memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); 2333e399441dSJames Smart ctrl->tag_set.ops = &nvme_fc_mq_ops; 2334e399441dSJames Smart ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; 2335e399441dSJames Smart ctrl->tag_set.reserved_tags = 1; /* fabric connect */ 2336e399441dSJames Smart ctrl->tag_set.numa_node = NUMA_NO_NODE; 2337e399441dSJames Smart ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; 2338e399441dSJames Smart ctrl->tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + 2339e399441dSJames Smart (SG_CHUNK_SIZE * 2340e399441dSJames Smart sizeof(struct scatterlist)) + 2341e399441dSJames Smart ctrl->lport->ops->fcprqst_priv_sz; 2342e399441dSJames Smart ctrl->tag_set.driver_data = ctrl; 2343d858e5f0SSagi Grimberg ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1; 2344e399441dSJames Smart ctrl->tag_set.timeout = NVME_IO_TIMEOUT; 2345e399441dSJames Smart 2346e399441dSJames Smart ret = blk_mq_alloc_tag_set(&ctrl->tag_set); 2347e399441dSJames Smart if (ret) 2348e399441dSJames Smart return ret; 2349e399441dSJames Smart 2350e399441dSJames Smart ctrl->ctrl.tagset = &ctrl->tag_set; 2351e399441dSJames Smart 2352e399441dSJames Smart ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); 2353e399441dSJames Smart if (IS_ERR(ctrl->ctrl.connect_q)) { 2354e399441dSJames Smart ret = PTR_ERR(ctrl->ctrl.connect_q); 2355e399441dSJames Smart goto out_free_tag_set; 2356e399441dSJames Smart } 2357e399441dSJames Smart 2358e399441dSJames Smart ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 2359e399441dSJames Smart if (ret) 2360e399441dSJames Smart goto out_cleanup_blk_queue; 2361e399441dSJames Smart 2362e399441dSJames Smart ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 2363e399441dSJames Smart if (ret) 2364e399441dSJames Smart goto out_delete_hw_queues; 2365e399441dSJames Smart 2366e399441dSJames Smart return 0; 2367e399441dSJames Smart 2368e399441dSJames Smart out_delete_hw_queues: 2369e399441dSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 2370e399441dSJames Smart out_cleanup_blk_queue: 2371e399441dSJames Smart blk_cleanup_queue(ctrl->ctrl.connect_q); 2372e399441dSJames Smart out_free_tag_set: 2373e399441dSJames Smart blk_mq_free_tag_set(&ctrl->tag_set); 2374e399441dSJames Smart nvme_fc_free_io_queues(ctrl); 2375e399441dSJames Smart 2376e399441dSJames Smart /* force put free routine to ignore io queues */ 2377e399441dSJames Smart ctrl->ctrl.tagset = NULL; 2378e399441dSJames Smart 2379e399441dSJames Smart return ret; 2380e399441dSJames Smart } 2381e399441dSJames Smart 238261bff8efSJames Smart static int 238361bff8efSJames Smart nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl) 238461bff8efSJames Smart { 238561bff8efSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 23867314183dSSagi Grimberg unsigned int nr_io_queues; 238761bff8efSJames Smart int ret; 238861bff8efSJames Smart 23897314183dSSagi Grimberg nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), 23907314183dSSagi Grimberg ctrl->lport->ops->max_hw_queues); 23917314183dSSagi Grimberg ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); 239261bff8efSJames Smart if (ret) { 239361bff8efSJames Smart dev_info(ctrl->ctrl.device, 239461bff8efSJames Smart "set_queue_count failed: %d\n", ret); 239561bff8efSJames Smart return ret; 239661bff8efSJames Smart } 239761bff8efSJames Smart 23987314183dSSagi Grimberg ctrl->ctrl.queue_count = nr_io_queues + 1; 239961bff8efSJames Smart /* check for io queues existing */ 2400d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count == 1) 240161bff8efSJames Smart return 0; 240261bff8efSJames Smart 240361bff8efSJames Smart nvme_fc_init_io_queues(ctrl); 240461bff8efSJames Smart 240531b84460SSagi Grimberg ret = nvme_reinit_tagset(&ctrl->ctrl, ctrl->ctrl.tagset); 240661bff8efSJames Smart if (ret) 240761bff8efSJames Smart goto out_free_io_queues; 240861bff8efSJames Smart 240961bff8efSJames Smart ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 241061bff8efSJames Smart if (ret) 241161bff8efSJames Smart goto out_free_io_queues; 241261bff8efSJames Smart 241361bff8efSJames Smart ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 241461bff8efSJames Smart if (ret) 241561bff8efSJames Smart goto out_delete_hw_queues; 241661bff8efSJames Smart 2417cda5fd1aSSagi Grimberg blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); 2418cda5fd1aSSagi Grimberg 241961bff8efSJames Smart return 0; 242061bff8efSJames Smart 242161bff8efSJames Smart out_delete_hw_queues: 242261bff8efSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 242361bff8efSJames Smart out_free_io_queues: 242461bff8efSJames Smart nvme_fc_free_io_queues(ctrl); 242561bff8efSJames Smart return ret; 242661bff8efSJames Smart } 242761bff8efSJames Smart 242861bff8efSJames Smart /* 242961bff8efSJames Smart * This routine restarts the controller on the host side, and 243061bff8efSJames Smart * on the link side, recreates the controller association. 243161bff8efSJames Smart */ 243261bff8efSJames Smart static int 243361bff8efSJames Smart nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) 243461bff8efSJames Smart { 243561bff8efSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 243661bff8efSJames Smart int ret; 243761bff8efSJames Smart bool changed; 243861bff8efSJames Smart 2439fdf9dfa8SSagi Grimberg ++ctrl->ctrl.nr_reconnects; 244061bff8efSJames Smart 244161bff8efSJames Smart /* 244261bff8efSJames Smart * Create the admin queue 244361bff8efSJames Smart */ 244461bff8efSJames Smart 244561bff8efSJames Smart nvme_fc_init_queue(ctrl, 0, NVME_FC_AQ_BLKMQ_DEPTH); 244661bff8efSJames Smart 244761bff8efSJames Smart ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, 244861bff8efSJames Smart NVME_FC_AQ_BLKMQ_DEPTH); 244961bff8efSJames Smart if (ret) 245061bff8efSJames Smart goto out_free_queue; 245161bff8efSJames Smart 245261bff8efSJames Smart ret = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], 245361bff8efSJames Smart NVME_FC_AQ_BLKMQ_DEPTH, 245461bff8efSJames Smart (NVME_FC_AQ_BLKMQ_DEPTH / 4)); 245561bff8efSJames Smart if (ret) 245661bff8efSJames Smart goto out_delete_hw_queue; 245761bff8efSJames Smart 245861bff8efSJames Smart if (ctrl->ctrl.state != NVME_CTRL_NEW) 2459f9c5af5fSSagi Grimberg blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 246061bff8efSJames Smart 246161bff8efSJames Smart ret = nvmf_connect_admin_queue(&ctrl->ctrl); 246261bff8efSJames Smart if (ret) 246361bff8efSJames Smart goto out_disconnect_admin_queue; 246461bff8efSJames Smart 246561bff8efSJames Smart /* 246661bff8efSJames Smart * Check controller capabilities 246761bff8efSJames Smart * 246861bff8efSJames Smart * todo:- add code to check if ctrl attributes changed from 246961bff8efSJames Smart * prior connection values 247061bff8efSJames Smart */ 247161bff8efSJames Smart 247220d0dfe6SSagi Grimberg ret = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->ctrl.cap); 247361bff8efSJames Smart if (ret) { 247461bff8efSJames Smart dev_err(ctrl->ctrl.device, 247561bff8efSJames Smart "prop_get NVME_REG_CAP failed\n"); 247661bff8efSJames Smart goto out_disconnect_admin_queue; 247761bff8efSJames Smart } 247861bff8efSJames Smart 247961bff8efSJames Smart ctrl->ctrl.sqsize = 248020d0dfe6SSagi Grimberg min_t(int, NVME_CAP_MQES(ctrl->ctrl.cap) + 1, ctrl->ctrl.sqsize); 248161bff8efSJames Smart 248220d0dfe6SSagi Grimberg ret = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); 248361bff8efSJames Smart if (ret) 248461bff8efSJames Smart goto out_disconnect_admin_queue; 248561bff8efSJames Smart 2486ecad0d2cSJames Smart ctrl->ctrl.max_hw_sectors = 2487ecad0d2cSJames Smart (ctrl->lport->ops->max_sgl_segments - 1) << (PAGE_SHIFT - 9); 248861bff8efSJames Smart 248961bff8efSJames Smart ret = nvme_init_identify(&ctrl->ctrl); 249061bff8efSJames Smart if (ret) 249161bff8efSJames Smart goto out_disconnect_admin_queue; 249261bff8efSJames Smart 249361bff8efSJames Smart /* sanity checks */ 249461bff8efSJames Smart 249561bff8efSJames Smart /* FC-NVME does not have other data in the capsule */ 249661bff8efSJames Smart if (ctrl->ctrl.icdoff) { 249761bff8efSJames Smart dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", 249861bff8efSJames Smart ctrl->ctrl.icdoff); 249961bff8efSJames Smart goto out_disconnect_admin_queue; 250061bff8efSJames Smart } 250161bff8efSJames Smart 250261bff8efSJames Smart /* FC-NVME supports normal SGL Data Block Descriptors */ 250361bff8efSJames Smart 250461bff8efSJames Smart if (opts->queue_size > ctrl->ctrl.maxcmd) { 250561bff8efSJames Smart /* warn if maxcmd is lower than queue_size */ 250661bff8efSJames Smart dev_warn(ctrl->ctrl.device, 250761bff8efSJames Smart "queue_size %zu > ctrl maxcmd %u, reducing " 250861bff8efSJames Smart "to queue_size\n", 250961bff8efSJames Smart opts->queue_size, ctrl->ctrl.maxcmd); 251061bff8efSJames Smart opts->queue_size = ctrl->ctrl.maxcmd; 251161bff8efSJames Smart } 251261bff8efSJames Smart 251361bff8efSJames Smart ret = nvme_fc_init_aen_ops(ctrl); 251461bff8efSJames Smart if (ret) 251561bff8efSJames Smart goto out_term_aen_ops; 251661bff8efSJames Smart 251761bff8efSJames Smart /* 251861bff8efSJames Smart * Create the io queues 251961bff8efSJames Smart */ 252061bff8efSJames Smart 2521d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count > 1) { 252261bff8efSJames Smart if (ctrl->ctrl.state == NVME_CTRL_NEW) 252361bff8efSJames Smart ret = nvme_fc_create_io_queues(ctrl); 252461bff8efSJames Smart else 252561bff8efSJames Smart ret = nvme_fc_reinit_io_queues(ctrl); 252661bff8efSJames Smart if (ret) 252761bff8efSJames Smart goto out_term_aen_ops; 252861bff8efSJames Smart } 252961bff8efSJames Smart 253061bff8efSJames Smart changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); 253161bff8efSJames Smart WARN_ON_ONCE(!changed); 253261bff8efSJames Smart 2533fdf9dfa8SSagi Grimberg ctrl->ctrl.nr_reconnects = 0; 253461bff8efSJames Smart 2535d09f2b45SSagi Grimberg nvme_start_ctrl(&ctrl->ctrl); 253661bff8efSJames Smart 253761bff8efSJames Smart return 0; /* Success */ 253861bff8efSJames Smart 253961bff8efSJames Smart out_term_aen_ops: 254061bff8efSJames Smart nvme_fc_term_aen_ops(ctrl); 254161bff8efSJames Smart out_disconnect_admin_queue: 254261bff8efSJames Smart /* send a Disconnect(association) LS to fc-nvme target */ 254361bff8efSJames Smart nvme_fc_xmt_disconnect_assoc(ctrl); 254461bff8efSJames Smart out_delete_hw_queue: 254561bff8efSJames Smart __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); 254661bff8efSJames Smart out_free_queue: 254761bff8efSJames Smart nvme_fc_free_queue(&ctrl->queues[0]); 254861bff8efSJames Smart 254961bff8efSJames Smart return ret; 255061bff8efSJames Smart } 255161bff8efSJames Smart 255261bff8efSJames Smart /* 255361bff8efSJames Smart * This routine stops operation of the controller on the host side. 255461bff8efSJames Smart * On the host os stack side: Admin and IO queues are stopped, 255561bff8efSJames Smart * outstanding ios on them terminated via FC ABTS. 255661bff8efSJames Smart * On the link side: the association is terminated. 255761bff8efSJames Smart */ 255861bff8efSJames Smart static void 255961bff8efSJames Smart nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl) 256061bff8efSJames Smart { 256161bff8efSJames Smart unsigned long flags; 256261bff8efSJames Smart 256361bff8efSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 256461bff8efSJames Smart ctrl->flags |= FCCTRL_TERMIO; 256561bff8efSJames Smart ctrl->iocnt = 0; 256661bff8efSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 256761bff8efSJames Smart 256861bff8efSJames Smart /* 256961bff8efSJames Smart * If io queues are present, stop them and terminate all outstanding 257061bff8efSJames Smart * ios on them. As FC allocates FC exchange for each io, the 257161bff8efSJames Smart * transport must contact the LLDD to terminate the exchange, 257261bff8efSJames Smart * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() 257361bff8efSJames Smart * to tell us what io's are busy and invoke a transport routine 257461bff8efSJames Smart * to kill them with the LLDD. After terminating the exchange 257561bff8efSJames Smart * the LLDD will call the transport's normal io done path, but it 257661bff8efSJames Smart * will have an aborted status. The done path will return the 257761bff8efSJames Smart * io requests back to the block layer as part of normal completions 257861bff8efSJames Smart * (but with error status). 257961bff8efSJames Smart */ 2580d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count > 1) { 258161bff8efSJames Smart nvme_stop_queues(&ctrl->ctrl); 258261bff8efSJames Smart blk_mq_tagset_busy_iter(&ctrl->tag_set, 258361bff8efSJames Smart nvme_fc_terminate_exchange, &ctrl->ctrl); 258461bff8efSJames Smart } 258561bff8efSJames Smart 258661bff8efSJames Smart /* 258761bff8efSJames Smart * Other transports, which don't have link-level contexts bound 258861bff8efSJames Smart * to sqe's, would try to gracefully shutdown the controller by 258961bff8efSJames Smart * writing the registers for shutdown and polling (call 259061bff8efSJames Smart * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially 259161bff8efSJames Smart * just aborted and we will wait on those contexts, and given 259261bff8efSJames Smart * there was no indication of how live the controlelr is on the 259361bff8efSJames Smart * link, don't send more io to create more contexts for the 259461bff8efSJames Smart * shutdown. Let the controller fail via keepalive failure if 259561bff8efSJames Smart * its still present. 259661bff8efSJames Smart */ 259761bff8efSJames Smart 259861bff8efSJames Smart /* 259961bff8efSJames Smart * clean up the admin queue. Same thing as above. 260061bff8efSJames Smart * use blk_mq_tagset_busy_itr() and the transport routine to 260161bff8efSJames Smart * terminate the exchanges. 260261bff8efSJames Smart */ 2603f9c5af5fSSagi Grimberg blk_mq_quiesce_queue(ctrl->ctrl.admin_q); 260461bff8efSJames Smart blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, 260561bff8efSJames Smart nvme_fc_terminate_exchange, &ctrl->ctrl); 260661bff8efSJames Smart 260761bff8efSJames Smart /* kill the aens as they are a separate path */ 260861bff8efSJames Smart nvme_fc_abort_aen_ops(ctrl); 260961bff8efSJames Smart 261061bff8efSJames Smart /* wait for all io that had to be aborted */ 261161bff8efSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 261236715cf4SJames Smart wait_event_lock_irq(ctrl->ioabort_wait, ctrl->iocnt == 0, ctrl->lock); 261361bff8efSJames Smart ctrl->flags &= ~FCCTRL_TERMIO; 261461bff8efSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 261561bff8efSJames Smart 261661bff8efSJames Smart nvme_fc_term_aen_ops(ctrl); 261761bff8efSJames Smart 261861bff8efSJames Smart /* 261961bff8efSJames Smart * send a Disconnect(association) LS to fc-nvme target 262061bff8efSJames Smart * Note: could have been sent at top of process, but 262161bff8efSJames Smart * cleaner on link traffic if after the aborts complete. 262261bff8efSJames Smart * Note: if association doesn't exist, association_id will be 0 262361bff8efSJames Smart */ 262461bff8efSJames Smart if (ctrl->association_id) 262561bff8efSJames Smart nvme_fc_xmt_disconnect_assoc(ctrl); 262661bff8efSJames Smart 262761bff8efSJames Smart if (ctrl->ctrl.tagset) { 262861bff8efSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 262961bff8efSJames Smart nvme_fc_free_io_queues(ctrl); 263061bff8efSJames Smart } 263161bff8efSJames Smart 263261bff8efSJames Smart __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); 263361bff8efSJames Smart nvme_fc_free_queue(&ctrl->queues[0]); 263461bff8efSJames Smart } 263561bff8efSJames Smart 263661bff8efSJames Smart static void 2637c5017e85SChristoph Hellwig nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl) 263861bff8efSJames Smart { 2639c5017e85SChristoph Hellwig struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 264061bff8efSJames Smart 2641d86c4d8eSChristoph Hellwig cancel_work_sync(&ctrl->ctrl.reset_work); 264261bff8efSJames Smart cancel_delayed_work_sync(&ctrl->connect_work); 2643d09f2b45SSagi Grimberg nvme_stop_ctrl(&ctrl->ctrl); 2644d09f2b45SSagi Grimberg nvme_remove_namespaces(&ctrl->ctrl); 264561bff8efSJames Smart /* 264661bff8efSJames Smart * kill the association on the link side. this will block 264761bff8efSJames Smart * waiting for io to terminate 264861bff8efSJames Smart */ 264961bff8efSJames Smart nvme_fc_delete_association(ctrl); 265061bff8efSJames Smart 265161bff8efSJames Smart /* 265261bff8efSJames Smart * tear down the controller 2653a5321aa5SJames Smart * After the last reference on the nvme ctrl is removed, 2654a5321aa5SJames Smart * the transport nvme_fc_nvme_ctrl_freed() callback will be 2655a5321aa5SJames Smart * invoked. From there, the transport will tear down it's 2656a5321aa5SJames Smart * logical queues and association. 265761bff8efSJames Smart */ 265861bff8efSJames Smart nvme_uninit_ctrl(&ctrl->ctrl); 265961bff8efSJames Smart 266061bff8efSJames Smart nvme_put_ctrl(&ctrl->ctrl); 266161bff8efSJames Smart } 266261bff8efSJames Smart 266361bff8efSJames Smart static void 26645bbecdbcSJames Smart nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) 26655bbecdbcSJames Smart { 26665bbecdbcSJames Smart /* If we are resetting/deleting then do nothing */ 26675bbecdbcSJames Smart if (ctrl->ctrl.state != NVME_CTRL_RECONNECTING) { 26685bbecdbcSJames Smart WARN_ON_ONCE(ctrl->ctrl.state == NVME_CTRL_NEW || 26695bbecdbcSJames Smart ctrl->ctrl.state == NVME_CTRL_LIVE); 26705bbecdbcSJames Smart return; 26715bbecdbcSJames Smart } 26725bbecdbcSJames Smart 2673589ff775SJames Smart dev_info(ctrl->ctrl.device, 26745bbecdbcSJames Smart "NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n", 26755bbecdbcSJames Smart ctrl->cnum, status); 26765bbecdbcSJames Smart 26775bbecdbcSJames Smart if (nvmf_should_reconnect(&ctrl->ctrl)) { 26785bbecdbcSJames Smart dev_info(ctrl->ctrl.device, 26795bbecdbcSJames Smart "NVME-FC{%d}: Reconnect attempt in %d seconds.\n", 26805bbecdbcSJames Smart ctrl->cnum, ctrl->ctrl.opts->reconnect_delay); 26819a6327d2SSagi Grimberg queue_delayed_work(nvme_wq, &ctrl->connect_work, 26825bbecdbcSJames Smart ctrl->ctrl.opts->reconnect_delay * HZ); 26835bbecdbcSJames Smart } else { 2684589ff775SJames Smart dev_warn(ctrl->ctrl.device, 26855bbecdbcSJames Smart "NVME-FC{%d}: Max reconnect attempts (%d) " 26865bbecdbcSJames Smart "reached. Removing controller\n", 2687fdf9dfa8SSagi Grimberg ctrl->cnum, ctrl->ctrl.nr_reconnects); 2688c5017e85SChristoph Hellwig WARN_ON(nvme_delete_ctrl(&ctrl->ctrl)); 26895bbecdbcSJames Smart } 26905bbecdbcSJames Smart } 26915bbecdbcSJames Smart 26925bbecdbcSJames Smart static void 269361bff8efSJames Smart nvme_fc_reset_ctrl_work(struct work_struct *work) 269461bff8efSJames Smart { 269561bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 2696d86c4d8eSChristoph Hellwig container_of(work, struct nvme_fc_ctrl, ctrl.reset_work); 269761bff8efSJames Smart int ret; 269861bff8efSJames Smart 2699d09f2b45SSagi Grimberg nvme_stop_ctrl(&ctrl->ctrl); 270061bff8efSJames Smart /* will block will waiting for io to terminate */ 270161bff8efSJames Smart nvme_fc_delete_association(ctrl); 270261bff8efSJames Smart 270361bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 27045bbecdbcSJames Smart if (ret) 27055bbecdbcSJames Smart nvme_fc_reconnect_or_delete(ctrl, ret); 27065bbecdbcSJames Smart else 270761bff8efSJames Smart dev_info(ctrl->ctrl.device, 270861bff8efSJames Smart "NVME-FC{%d}: controller reset complete\n", ctrl->cnum); 270961bff8efSJames Smart } 271061bff8efSJames Smart 271161bff8efSJames Smart static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { 271261bff8efSJames Smart .name = "fc", 271361bff8efSJames Smart .module = THIS_MODULE, 2714d3d5b87dSChristoph Hellwig .flags = NVME_F_FABRICS, 271561bff8efSJames Smart .reg_read32 = nvmf_reg_read32, 271661bff8efSJames Smart .reg_read64 = nvmf_reg_read64, 271761bff8efSJames Smart .reg_write32 = nvmf_reg_write32, 271861bff8efSJames Smart .free_ctrl = nvme_fc_nvme_ctrl_freed, 271961bff8efSJames Smart .submit_async_event = nvme_fc_submit_async_event, 2720c5017e85SChristoph Hellwig .delete_ctrl = nvme_fc_delete_ctrl, 272161bff8efSJames Smart .get_address = nvmf_get_address, 272231b84460SSagi Grimberg .reinit_request = nvme_fc_reinit_request, 272361bff8efSJames Smart }; 272461bff8efSJames Smart 272561bff8efSJames Smart static void 272661bff8efSJames Smart nvme_fc_connect_ctrl_work(struct work_struct *work) 272761bff8efSJames Smart { 272861bff8efSJames Smart int ret; 272961bff8efSJames Smart 273061bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 273161bff8efSJames Smart container_of(to_delayed_work(work), 273261bff8efSJames Smart struct nvme_fc_ctrl, connect_work); 273361bff8efSJames Smart 273461bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 27355bbecdbcSJames Smart if (ret) 27365bbecdbcSJames Smart nvme_fc_reconnect_or_delete(ctrl, ret); 27375bbecdbcSJames Smart else 273861bff8efSJames Smart dev_info(ctrl->ctrl.device, 273961bff8efSJames Smart "NVME-FC{%d}: controller reconnect complete\n", 274061bff8efSJames Smart ctrl->cnum); 274161bff8efSJames Smart } 274261bff8efSJames Smart 274361bff8efSJames Smart 274461bff8efSJames Smart static const struct blk_mq_ops nvme_fc_admin_mq_ops = { 274561bff8efSJames Smart .queue_rq = nvme_fc_queue_rq, 274661bff8efSJames Smart .complete = nvme_fc_complete_rq, 274776f983cbSChristoph Hellwig .init_request = nvme_fc_init_request, 274861bff8efSJames Smart .exit_request = nvme_fc_exit_request, 274961bff8efSJames Smart .init_hctx = nvme_fc_init_admin_hctx, 275061bff8efSJames Smart .timeout = nvme_fc_timeout, 275161bff8efSJames Smart }; 275261bff8efSJames Smart 2753e399441dSJames Smart 275456d5f4f1SJames Smart /* 275556d5f4f1SJames Smart * Fails a controller request if it matches an existing controller 275656d5f4f1SJames Smart * (association) with the same tuple: 275756d5f4f1SJames Smart * <Host NQN, Host ID, local FC port, remote FC port, SUBSYS NQN> 275856d5f4f1SJames Smart * 275956d5f4f1SJames Smart * The ports don't need to be compared as they are intrinsically 276056d5f4f1SJames Smart * already matched by the port pointers supplied. 276156d5f4f1SJames Smart */ 276256d5f4f1SJames Smart static bool 276356d5f4f1SJames Smart nvme_fc_existing_controller(struct nvme_fc_rport *rport, 276456d5f4f1SJames Smart struct nvmf_ctrl_options *opts) 276556d5f4f1SJames Smart { 276656d5f4f1SJames Smart struct nvme_fc_ctrl *ctrl; 276756d5f4f1SJames Smart unsigned long flags; 276856d5f4f1SJames Smart bool found = false; 276956d5f4f1SJames Smart 277056d5f4f1SJames Smart spin_lock_irqsave(&rport->lock, flags); 277156d5f4f1SJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) { 277256d5f4f1SJames Smart found = nvmf_ctlr_matches_baseopts(&ctrl->ctrl, opts); 277356d5f4f1SJames Smart if (found) 277456d5f4f1SJames Smart break; 277556d5f4f1SJames Smart } 277656d5f4f1SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 277756d5f4f1SJames Smart 277856d5f4f1SJames Smart return found; 277956d5f4f1SJames Smart } 278056d5f4f1SJames Smart 2781e399441dSJames Smart static struct nvme_ctrl * 278261bff8efSJames Smart nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, 2783e399441dSJames Smart struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) 2784e399441dSJames Smart { 2785e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 2786e399441dSJames Smart unsigned long flags; 2787e399441dSJames Smart int ret, idx; 2788e399441dSJames Smart 278985e6a6adSJames Smart if (!(rport->remoteport.port_role & 279085e6a6adSJames Smart (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) { 279185e6a6adSJames Smart ret = -EBADR; 279285e6a6adSJames Smart goto out_fail; 279385e6a6adSJames Smart } 279485e6a6adSJames Smart 279556d5f4f1SJames Smart if (!opts->duplicate_connect && 279656d5f4f1SJames Smart nvme_fc_existing_controller(rport, opts)) { 279756d5f4f1SJames Smart ret = -EALREADY; 279856d5f4f1SJames Smart goto out_fail; 279956d5f4f1SJames Smart } 280056d5f4f1SJames Smart 2801e399441dSJames Smart ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 2802e399441dSJames Smart if (!ctrl) { 2803e399441dSJames Smart ret = -ENOMEM; 2804e399441dSJames Smart goto out_fail; 2805e399441dSJames Smart } 2806e399441dSJames Smart 2807e399441dSJames Smart idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); 2808e399441dSJames Smart if (idx < 0) { 2809e399441dSJames Smart ret = -ENOSPC; 2810e399441dSJames Smart goto out_free_ctrl; 2811e399441dSJames Smart } 2812e399441dSJames Smart 2813e399441dSJames Smart ctrl->ctrl.opts = opts; 2814e399441dSJames Smart INIT_LIST_HEAD(&ctrl->ctrl_list); 2815e399441dSJames Smart ctrl->lport = lport; 2816e399441dSJames Smart ctrl->rport = rport; 2817e399441dSJames Smart ctrl->dev = lport->dev; 2818e399441dSJames Smart ctrl->cnum = idx; 2819e399441dSJames Smart 2820e399441dSJames Smart get_device(ctrl->dev); 2821e399441dSJames Smart kref_init(&ctrl->ref); 2822e399441dSJames Smart 2823d86c4d8eSChristoph Hellwig INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work); 282461bff8efSJames Smart INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work); 2825e399441dSJames Smart spin_lock_init(&ctrl->lock); 2826e399441dSJames Smart 2827e399441dSJames Smart /* io queue count */ 2828d858e5f0SSagi Grimberg ctrl->ctrl.queue_count = min_t(unsigned int, 2829e399441dSJames Smart opts->nr_io_queues, 2830e399441dSJames Smart lport->ops->max_hw_queues); 2831d858e5f0SSagi Grimberg ctrl->ctrl.queue_count++; /* +1 for admin queue */ 2832e399441dSJames Smart 2833e399441dSJames Smart ctrl->ctrl.sqsize = opts->queue_size - 1; 2834e399441dSJames Smart ctrl->ctrl.kato = opts->kato; 2835e399441dSJames Smart 2836e399441dSJames Smart ret = -ENOMEM; 2837d858e5f0SSagi Grimberg ctrl->queues = kcalloc(ctrl->ctrl.queue_count, 2838d858e5f0SSagi Grimberg sizeof(struct nvme_fc_queue), GFP_KERNEL); 2839e399441dSJames Smart if (!ctrl->queues) 284061bff8efSJames Smart goto out_free_ida; 2841e399441dSJames Smart 284261bff8efSJames Smart memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); 284361bff8efSJames Smart ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; 284461bff8efSJames Smart ctrl->admin_tag_set.queue_depth = NVME_FC_AQ_BLKMQ_DEPTH; 284561bff8efSJames Smart ctrl->admin_tag_set.reserved_tags = 2; /* fabric connect + Keep-Alive */ 284661bff8efSJames Smart ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; 284761bff8efSJames Smart ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + 284861bff8efSJames Smart (SG_CHUNK_SIZE * 284961bff8efSJames Smart sizeof(struct scatterlist)) + 285061bff8efSJames Smart ctrl->lport->ops->fcprqst_priv_sz; 285161bff8efSJames Smart ctrl->admin_tag_set.driver_data = ctrl; 285261bff8efSJames Smart ctrl->admin_tag_set.nr_hw_queues = 1; 285361bff8efSJames Smart ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; 28545a22e2bfSIsrael Rukshin ctrl->admin_tag_set.flags = BLK_MQ_F_NO_SCHED; 285561bff8efSJames Smart 285661bff8efSJames Smart ret = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); 2857e399441dSJames Smart if (ret) 285861bff8efSJames Smart goto out_free_queues; 285934b6c231SSagi Grimberg ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; 2860e399441dSJames Smart 286161bff8efSJames Smart ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); 286261bff8efSJames Smart if (IS_ERR(ctrl->ctrl.admin_q)) { 286361bff8efSJames Smart ret = PTR_ERR(ctrl->ctrl.admin_q); 286461bff8efSJames Smart goto out_free_admin_tag_set; 2865e399441dSJames Smart } 2866e399441dSJames Smart 286761bff8efSJames Smart /* 286861bff8efSJames Smart * Would have been nice to init io queues tag set as well. 286961bff8efSJames Smart * However, we require interaction from the controller 287061bff8efSJames Smart * for max io queue count before we can do so. 287161bff8efSJames Smart * Defer this to the connect path. 287261bff8efSJames Smart */ 2873e399441dSJames Smart 287461bff8efSJames Smart ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); 2875e399441dSJames Smart if (ret) 287661bff8efSJames Smart goto out_cleanup_admin_q; 2877e399441dSJames Smart 287861bff8efSJames Smart /* at this point, teardown path changes to ref counting on nvme ctrl */ 2879e399441dSJames Smart 2880e399441dSJames Smart spin_lock_irqsave(&rport->lock, flags); 2881e399441dSJames Smart list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); 2882e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 2883e399441dSJames Smart 288461bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 288561bff8efSJames Smart if (ret) { 2886de41447aSEwan D. Milne ctrl->ctrl.opts = NULL; 288761bff8efSJames Smart /* initiate nvme ctrl ref counting teardown */ 288861bff8efSJames Smart nvme_uninit_ctrl(&ctrl->ctrl); 288924b7f059SJames Smart nvme_put_ctrl(&ctrl->ctrl); 289061bff8efSJames Smart 28910b5a7669SJames Smart /* Remove core ctrl ref. */ 28920b5a7669SJames Smart nvme_put_ctrl(&ctrl->ctrl); 28930b5a7669SJames Smart 289461bff8efSJames Smart /* as we're past the point where we transition to the ref 289561bff8efSJames Smart * counting teardown path, if we return a bad pointer here, 289661bff8efSJames Smart * the calling routine, thinking it's prior to the 289761bff8efSJames Smart * transition, will do an rport put. Since the teardown 289861bff8efSJames Smart * path also does a rport put, we do an extra get here to 289961bff8efSJames Smart * so proper order/teardown happens. 290061bff8efSJames Smart */ 290161bff8efSJames Smart nvme_fc_rport_get(rport); 290261bff8efSJames Smart 290361bff8efSJames Smart if (ret > 0) 290461bff8efSJames Smart ret = -EIO; 290561bff8efSJames Smart return ERR_PTR(ret); 2906e399441dSJames Smart } 2907e399441dSJames Smart 2908d22524a4SChristoph Hellwig nvme_get_ctrl(&ctrl->ctrl); 29092cb657bcSJames Smart 291061bff8efSJames Smart dev_info(ctrl->ctrl.device, 291161bff8efSJames Smart "NVME-FC{%d}: new ctrl: NQN \"%s\"\n", 291261bff8efSJames Smart ctrl->cnum, ctrl->ctrl.opts->subsysnqn); 291361bff8efSJames Smart 2914e399441dSJames Smart return &ctrl->ctrl; 2915e399441dSJames Smart 291661bff8efSJames Smart out_cleanup_admin_q: 291761bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.admin_q); 291861bff8efSJames Smart out_free_admin_tag_set: 291961bff8efSJames Smart blk_mq_free_tag_set(&ctrl->admin_tag_set); 292061bff8efSJames Smart out_free_queues: 292161bff8efSJames Smart kfree(ctrl->queues); 2922e399441dSJames Smart out_free_ida: 292361bff8efSJames Smart put_device(ctrl->dev); 2924e399441dSJames Smart ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); 2925e399441dSJames Smart out_free_ctrl: 2926e399441dSJames Smart kfree(ctrl); 2927e399441dSJames Smart out_fail: 2928e399441dSJames Smart /* exit via here doesn't follow ctlr ref points */ 2929e399441dSJames Smart return ERR_PTR(ret); 2930e399441dSJames Smart } 2931e399441dSJames Smart 2932e399441dSJames Smart 2933e399441dSJames Smart struct nvmet_fc_traddr { 2934e399441dSJames Smart u64 nn; 2935e399441dSJames Smart u64 pn; 2936e399441dSJames Smart }; 2937e399441dSJames Smart 2938e399441dSJames Smart static int 29399c5358e1SJames Smart __nvme_fc_parse_u64(substring_t *sstr, u64 *val) 2940e399441dSJames Smart { 2941e399441dSJames Smart u64 token64; 2942e399441dSJames Smart 29439c5358e1SJames Smart if (match_u64(sstr, &token64)) 29449c5358e1SJames Smart return -EINVAL; 29459c5358e1SJames Smart *val = token64; 2946e399441dSJames Smart 29479c5358e1SJames Smart return 0; 2948e399441dSJames Smart } 2949e399441dSJames Smart 29509c5358e1SJames Smart /* 29519c5358e1SJames Smart * This routine validates and extracts the WWN's from the TRADDR string. 29529c5358e1SJames Smart * As kernel parsers need the 0x to determine number base, universally 29539c5358e1SJames Smart * build string to parse with 0x prefix before parsing name strings. 29549c5358e1SJames Smart */ 29559c5358e1SJames Smart static int 29569c5358e1SJames Smart nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen) 29579c5358e1SJames Smart { 29589c5358e1SJames Smart char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1]; 29599c5358e1SJames Smart substring_t wwn = { name, &name[sizeof(name)-1] }; 29609c5358e1SJames Smart int nnoffset, pnoffset; 29619c5358e1SJames Smart 29629c5358e1SJames Smart /* validate it string one of the 2 allowed formats */ 29639c5358e1SJames Smart if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH && 29649c5358e1SJames Smart !strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) && 29659c5358e1SJames Smart !strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET], 29669c5358e1SJames Smart "pn-0x", NVME_FC_TRADDR_OXNNLEN)) { 29679c5358e1SJames Smart nnoffset = NVME_FC_TRADDR_OXNNLEN; 29689c5358e1SJames Smart pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET + 29699c5358e1SJames Smart NVME_FC_TRADDR_OXNNLEN; 29709c5358e1SJames Smart } else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH && 29719c5358e1SJames Smart !strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) && 29729c5358e1SJames Smart !strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET], 29739c5358e1SJames Smart "pn-", NVME_FC_TRADDR_NNLEN))) { 29749c5358e1SJames Smart nnoffset = NVME_FC_TRADDR_NNLEN; 29759c5358e1SJames Smart pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN; 29769c5358e1SJames Smart } else 29779c5358e1SJames Smart goto out_einval; 29789c5358e1SJames Smart 29799c5358e1SJames Smart name[0] = '0'; 29809c5358e1SJames Smart name[1] = 'x'; 29819c5358e1SJames Smart name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0; 29829c5358e1SJames Smart 29839c5358e1SJames Smart memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN); 29849c5358e1SJames Smart if (__nvme_fc_parse_u64(&wwn, &traddr->nn)) 29859c5358e1SJames Smart goto out_einval; 29869c5358e1SJames Smart 29879c5358e1SJames Smart memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN); 29889c5358e1SJames Smart if (__nvme_fc_parse_u64(&wwn, &traddr->pn)) 29899c5358e1SJames Smart goto out_einval; 29909c5358e1SJames Smart 29919c5358e1SJames Smart return 0; 29929c5358e1SJames Smart 29939c5358e1SJames Smart out_einval: 29949c5358e1SJames Smart pr_warn("%s: bad traddr string\n", __func__); 29959c5358e1SJames Smart return -EINVAL; 2996e399441dSJames Smart } 2997e399441dSJames Smart 2998e399441dSJames Smart static struct nvme_ctrl * 2999e399441dSJames Smart nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) 3000e399441dSJames Smart { 3001e399441dSJames Smart struct nvme_fc_lport *lport; 3002e399441dSJames Smart struct nvme_fc_rport *rport; 300361bff8efSJames Smart struct nvme_ctrl *ctrl; 3004e399441dSJames Smart struct nvmet_fc_traddr laddr = { 0L, 0L }; 3005e399441dSJames Smart struct nvmet_fc_traddr raddr = { 0L, 0L }; 3006e399441dSJames Smart unsigned long flags; 3007e399441dSJames Smart int ret; 3008e399441dSJames Smart 30099c5358e1SJames Smart ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE); 3010e399441dSJames Smart if (ret || !raddr.nn || !raddr.pn) 3011e399441dSJames Smart return ERR_PTR(-EINVAL); 3012e399441dSJames Smart 30139c5358e1SJames Smart ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE); 3014e399441dSJames Smart if (ret || !laddr.nn || !laddr.pn) 3015e399441dSJames Smart return ERR_PTR(-EINVAL); 3016e399441dSJames Smart 3017e399441dSJames Smart /* find the host and remote ports to connect together */ 3018e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 3019e399441dSJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 3020e399441dSJames Smart if (lport->localport.node_name != laddr.nn || 3021e399441dSJames Smart lport->localport.port_name != laddr.pn) 3022e399441dSJames Smart continue; 3023e399441dSJames Smart 3024e399441dSJames Smart list_for_each_entry(rport, &lport->endp_list, endp_list) { 3025e399441dSJames Smart if (rport->remoteport.node_name != raddr.nn || 3026e399441dSJames Smart rport->remoteport.port_name != raddr.pn) 3027e399441dSJames Smart continue; 3028e399441dSJames Smart 3029e399441dSJames Smart /* if fail to get reference fall through. Will error */ 3030e399441dSJames Smart if (!nvme_fc_rport_get(rport)) 3031e399441dSJames Smart break; 3032e399441dSJames Smart 3033e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3034e399441dSJames Smart 303561bff8efSJames Smart ctrl = nvme_fc_init_ctrl(dev, opts, lport, rport); 303661bff8efSJames Smart if (IS_ERR(ctrl)) 303761bff8efSJames Smart nvme_fc_rport_put(rport); 303861bff8efSJames Smart return ctrl; 3039e399441dSJames Smart } 3040e399441dSJames Smart } 3041e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3042e399441dSJames Smart 3043e399441dSJames Smart return ERR_PTR(-ENOENT); 3044e399441dSJames Smart } 3045e399441dSJames Smart 3046e399441dSJames Smart 3047e399441dSJames Smart static struct nvmf_transport_ops nvme_fc_transport = { 3048e399441dSJames Smart .name = "fc", 3049e399441dSJames Smart .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, 30505bbecdbcSJames Smart .allowed_opts = NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_CTRL_LOSS_TMO, 3051e399441dSJames Smart .create_ctrl = nvme_fc_create_ctrl, 3052e399441dSJames Smart }; 3053e399441dSJames Smart 3054e399441dSJames Smart static int __init nvme_fc_init_module(void) 3055e399441dSJames Smart { 30565f568556SJames Smart int ret; 30575f568556SJames Smart 30585f568556SJames Smart /* 30595f568556SJames Smart * NOTE: 30605f568556SJames Smart * It is expected that in the future the kernel will combine 30615f568556SJames Smart * the FC-isms that are currently under scsi and now being 30625f568556SJames Smart * added to by NVME into a new standalone FC class. The SCSI 30635f568556SJames Smart * and NVME protocols and their devices would be under this 30645f568556SJames Smart * new FC class. 30655f568556SJames Smart * 30665f568556SJames Smart * As we need something to post FC-specific udev events to, 30675f568556SJames Smart * specifically for nvme probe events, start by creating the 30685f568556SJames Smart * new device class. When the new standalone FC class is 30695f568556SJames Smart * put in place, this code will move to a more generic 30705f568556SJames Smart * location for the class. 30715f568556SJames Smart */ 30725f568556SJames Smart fc_class = class_create(THIS_MODULE, "fc"); 30735f568556SJames Smart if (IS_ERR(fc_class)) { 30745f568556SJames Smart pr_err("couldn't register class fc\n"); 30755f568556SJames Smart return PTR_ERR(fc_class); 30765f568556SJames Smart } 30775f568556SJames Smart 30785f568556SJames Smart /* 30795f568556SJames Smart * Create a device for the FC-centric udev events 30805f568556SJames Smart */ 30815f568556SJames Smart fc_udev_device = device_create(fc_class, NULL, MKDEV(0, 0), NULL, 30825f568556SJames Smart "fc_udev_device"); 30835f568556SJames Smart if (IS_ERR(fc_udev_device)) { 30845f568556SJames Smart pr_err("couldn't create fc_udev device!\n"); 30855f568556SJames Smart ret = PTR_ERR(fc_udev_device); 30865f568556SJames Smart goto out_destroy_class; 30875f568556SJames Smart } 30885f568556SJames Smart 30895f568556SJames Smart ret = nvmf_register_transport(&nvme_fc_transport); 30905f568556SJames Smart if (ret) 30915f568556SJames Smart goto out_destroy_device; 30925f568556SJames Smart 30935f568556SJames Smart return 0; 30945f568556SJames Smart 30955f568556SJames Smart out_destroy_device: 30965f568556SJames Smart device_destroy(fc_class, MKDEV(0, 0)); 30975f568556SJames Smart out_destroy_class: 30985f568556SJames Smart class_destroy(fc_class); 30995f568556SJames Smart return ret; 3100e399441dSJames Smart } 3101e399441dSJames Smart 3102e399441dSJames Smart static void __exit nvme_fc_exit_module(void) 3103e399441dSJames Smart { 3104e399441dSJames Smart /* sanity check - all lports should be removed */ 3105e399441dSJames Smart if (!list_empty(&nvme_fc_lport_list)) 3106e399441dSJames Smart pr_warn("%s: localport list not empty\n", __func__); 3107e399441dSJames Smart 3108e399441dSJames Smart nvmf_unregister_transport(&nvme_fc_transport); 3109e399441dSJames Smart 3110e399441dSJames Smart ida_destroy(&nvme_fc_local_port_cnt); 3111e399441dSJames Smart ida_destroy(&nvme_fc_ctrl_cnt); 31125f568556SJames Smart 31135f568556SJames Smart device_destroy(fc_class, MKDEV(0, 0)); 31145f568556SJames Smart class_destroy(fc_class); 3115e399441dSJames Smart } 3116e399441dSJames Smart 3117e399441dSJames Smart module_init(nvme_fc_init_module); 3118e399441dSJames Smart module_exit(nvme_fc_exit_module); 3119e399441dSJames Smart 3120e399441dSJames Smart MODULE_LICENSE("GPL v2"); 3121