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 160e399441dSJames Smart struct work_struct delete_work; 16161bff8efSJames Smart struct delayed_work connect_work; 16261bff8efSJames Smart 163e399441dSJames Smart struct kref ref; 16461bff8efSJames Smart u32 flags; 16561bff8efSJames Smart u32 iocnt; 16636715cf4SJames Smart wait_queue_head_t ioabort_wait; 167e399441dSJames Smart 168e399441dSJames Smart struct nvme_fc_fcp_op aen_ops[NVME_FC_NR_AEN_COMMANDS]; 169e399441dSJames Smart 170e399441dSJames Smart struct nvme_ctrl ctrl; 171e399441dSJames Smart }; 172e399441dSJames Smart 173e399441dSJames Smart static inline struct nvme_fc_ctrl * 174e399441dSJames Smart to_fc_ctrl(struct nvme_ctrl *ctrl) 175e399441dSJames Smart { 176e399441dSJames Smart return container_of(ctrl, struct nvme_fc_ctrl, ctrl); 177e399441dSJames Smart } 178e399441dSJames Smart 179e399441dSJames Smart static inline struct nvme_fc_lport * 180e399441dSJames Smart localport_to_lport(struct nvme_fc_local_port *portptr) 181e399441dSJames Smart { 182e399441dSJames Smart return container_of(portptr, struct nvme_fc_lport, localport); 183e399441dSJames Smart } 184e399441dSJames Smart 185e399441dSJames Smart static inline struct nvme_fc_rport * 186e399441dSJames Smart remoteport_to_rport(struct nvme_fc_remote_port *portptr) 187e399441dSJames Smart { 188e399441dSJames Smart return container_of(portptr, struct nvme_fc_rport, remoteport); 189e399441dSJames Smart } 190e399441dSJames Smart 191e399441dSJames Smart static inline struct nvmefc_ls_req_op * 192e399441dSJames Smart ls_req_to_lsop(struct nvmefc_ls_req *lsreq) 193e399441dSJames Smart { 194e399441dSJames Smart return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); 195e399441dSJames Smart } 196e399441dSJames Smart 197e399441dSJames Smart static inline struct nvme_fc_fcp_op * 198e399441dSJames Smart fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) 199e399441dSJames Smart { 200e399441dSJames Smart return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); 201e399441dSJames Smart } 202e399441dSJames Smart 203e399441dSJames Smart 204e399441dSJames Smart 205e399441dSJames Smart /* *************************** Globals **************************** */ 206e399441dSJames Smart 207e399441dSJames Smart 208e399441dSJames Smart static DEFINE_SPINLOCK(nvme_fc_lock); 209e399441dSJames Smart 210e399441dSJames Smart static LIST_HEAD(nvme_fc_lport_list); 211e399441dSJames Smart static DEFINE_IDA(nvme_fc_local_port_cnt); 212e399441dSJames Smart static DEFINE_IDA(nvme_fc_ctrl_cnt); 213e399441dSJames Smart 214e399441dSJames Smart 215e399441dSJames Smart 216e399441dSJames Smart 217e399441dSJames Smart /* *********************** FC-NVME Port Management ************************ */ 218e399441dSJames Smart 219e399441dSJames Smart static int __nvme_fc_del_ctrl(struct nvme_fc_ctrl *); 220e399441dSJames Smart static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, 221e399441dSJames Smart struct nvme_fc_queue *, unsigned int); 222e399441dSJames Smart 2235533d424SJames Smart static void 2245533d424SJames Smart nvme_fc_free_lport(struct kref *ref) 2255533d424SJames Smart { 2265533d424SJames Smart struct nvme_fc_lport *lport = 2275533d424SJames Smart container_of(ref, struct nvme_fc_lport, ref); 2285533d424SJames Smart unsigned long flags; 2295533d424SJames Smart 2305533d424SJames Smart WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); 2315533d424SJames Smart WARN_ON(!list_empty(&lport->endp_list)); 2325533d424SJames Smart 2335533d424SJames Smart /* remove from transport list */ 2345533d424SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2355533d424SJames Smart list_del(&lport->port_list); 2365533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 2375533d424SJames Smart 2385533d424SJames Smart /* let the LLDD know we've finished tearing it down */ 2395533d424SJames Smart lport->ops->localport_delete(&lport->localport); 2405533d424SJames Smart 2415533d424SJames Smart ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); 2425533d424SJames Smart ida_destroy(&lport->endp_cnt); 2435533d424SJames Smart 2445533d424SJames Smart put_device(lport->dev); 2455533d424SJames Smart 2465533d424SJames Smart kfree(lport); 2475533d424SJames Smart } 2485533d424SJames Smart 2495533d424SJames Smart static void 2505533d424SJames Smart nvme_fc_lport_put(struct nvme_fc_lport *lport) 2515533d424SJames Smart { 2525533d424SJames Smart kref_put(&lport->ref, nvme_fc_free_lport); 2535533d424SJames Smart } 2545533d424SJames Smart 2555533d424SJames Smart static int 2565533d424SJames Smart nvme_fc_lport_get(struct nvme_fc_lport *lport) 2575533d424SJames Smart { 2585533d424SJames Smart return kref_get_unless_zero(&lport->ref); 2595533d424SJames Smart } 2605533d424SJames Smart 2615533d424SJames Smart 2625533d424SJames Smart static struct nvme_fc_lport * 2635533d424SJames Smart nvme_fc_attach_to_unreg_lport(struct nvme_fc_port_info *pinfo) 2645533d424SJames Smart { 2655533d424SJames Smart struct nvme_fc_lport *lport; 2665533d424SJames Smart unsigned long flags; 2675533d424SJames Smart 2685533d424SJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2695533d424SJames Smart 2705533d424SJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 2715533d424SJames Smart if (lport->localport.node_name != pinfo->node_name || 2725533d424SJames Smart lport->localport.port_name != pinfo->port_name) 2735533d424SJames Smart continue; 2745533d424SJames Smart 2755533d424SJames Smart if (lport->localport.port_state != FC_OBJSTATE_DELETED) { 2765533d424SJames Smart lport = ERR_PTR(-EEXIST); 2775533d424SJames Smart goto out_done; 2785533d424SJames Smart } 2795533d424SJames Smart 2805533d424SJames Smart if (!nvme_fc_lport_get(lport)) { 2815533d424SJames Smart /* 2825533d424SJames Smart * fails if ref cnt already 0. If so, 2835533d424SJames Smart * act as if lport already deleted 2845533d424SJames Smart */ 2855533d424SJames Smart lport = NULL; 2865533d424SJames Smart goto out_done; 2875533d424SJames Smart } 2885533d424SJames Smart 2895533d424SJames Smart /* resume the lport */ 2905533d424SJames Smart 2915533d424SJames Smart lport->localport.port_role = pinfo->port_role; 2925533d424SJames Smart lport->localport.port_id = pinfo->port_id; 2935533d424SJames Smart lport->localport.port_state = FC_OBJSTATE_ONLINE; 2945533d424SJames Smart 2955533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 2965533d424SJames Smart 2975533d424SJames Smart return lport; 2985533d424SJames Smart } 2995533d424SJames Smart 3005533d424SJames Smart lport = NULL; 3015533d424SJames Smart 3025533d424SJames Smart out_done: 3035533d424SJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 3045533d424SJames Smart 3055533d424SJames Smart return lport; 3065533d424SJames Smart } 307e399441dSJames Smart 308e399441dSJames Smart /** 309e399441dSJames Smart * nvme_fc_register_localport - transport entry point called by an 310e399441dSJames Smart * LLDD to register the existence of a NVME 311e399441dSJames Smart * host FC port. 312e399441dSJames Smart * @pinfo: pointer to information about the port to be registered 313e399441dSJames Smart * @template: LLDD entrypoints and operational parameters for the port 314e399441dSJames Smart * @dev: physical hardware device node port corresponds to. Will be 315e399441dSJames Smart * used for DMA mappings 316e399441dSJames Smart * @lport_p: pointer to a local port pointer. Upon success, the routine 317e399441dSJames Smart * will allocate a nvme_fc_local_port structure and place its 318e399441dSJames Smart * address in the local port pointer. Upon failure, local port 319e399441dSJames Smart * pointer will be set to 0. 320e399441dSJames Smart * 321e399441dSJames Smart * Returns: 322e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 323e399441dSJames Smart * (ex: -ENXIO) upon failure. 324e399441dSJames Smart */ 325e399441dSJames Smart int 326e399441dSJames Smart nvme_fc_register_localport(struct nvme_fc_port_info *pinfo, 327e399441dSJames Smart struct nvme_fc_port_template *template, 328e399441dSJames Smart struct device *dev, 329e399441dSJames Smart struct nvme_fc_local_port **portptr) 330e399441dSJames Smart { 331e399441dSJames Smart struct nvme_fc_lport *newrec; 332e399441dSJames Smart unsigned long flags; 333e399441dSJames Smart int ret, idx; 334e399441dSJames Smart 335e399441dSJames Smart if (!template->localport_delete || !template->remoteport_delete || 336e399441dSJames Smart !template->ls_req || !template->fcp_io || 337e399441dSJames Smart !template->ls_abort || !template->fcp_abort || 338e399441dSJames Smart !template->max_hw_queues || !template->max_sgl_segments || 339e399441dSJames Smart !template->max_dif_sgl_segments || !template->dma_boundary) { 340e399441dSJames Smart ret = -EINVAL; 341e399441dSJames Smart goto out_reghost_failed; 342e399441dSJames Smart } 343e399441dSJames Smart 3445533d424SJames Smart /* 3455533d424SJames Smart * look to see if there is already a localport that had been 3465533d424SJames Smart * deregistered and in the process of waiting for all the 3475533d424SJames Smart * references to fully be removed. If the references haven't 3485533d424SJames Smart * expired, we can simply re-enable the localport. Remoteports 3495533d424SJames Smart * and controller reconnections should resume naturally. 3505533d424SJames Smart */ 3515533d424SJames Smart newrec = nvme_fc_attach_to_unreg_lport(pinfo); 3525533d424SJames Smart 3535533d424SJames Smart /* found an lport, but something about its state is bad */ 3545533d424SJames Smart if (IS_ERR(newrec)) { 3555533d424SJames Smart ret = PTR_ERR(newrec); 3565533d424SJames Smart goto out_reghost_failed; 3575533d424SJames Smart 3585533d424SJames Smart /* found existing lport, which was resumed */ 3595533d424SJames Smart } else if (newrec) { 3605533d424SJames Smart *portptr = &newrec->localport; 3615533d424SJames Smart return 0; 3625533d424SJames Smart } 3635533d424SJames Smart 3645533d424SJames Smart /* nothing found - allocate a new localport struct */ 3655533d424SJames Smart 366e399441dSJames Smart newrec = kmalloc((sizeof(*newrec) + template->local_priv_sz), 367e399441dSJames Smart GFP_KERNEL); 368e399441dSJames Smart if (!newrec) { 369e399441dSJames Smart ret = -ENOMEM; 370e399441dSJames Smart goto out_reghost_failed; 371e399441dSJames Smart } 372e399441dSJames Smart 373e399441dSJames Smart idx = ida_simple_get(&nvme_fc_local_port_cnt, 0, 0, GFP_KERNEL); 374e399441dSJames Smart if (idx < 0) { 375e399441dSJames Smart ret = -ENOSPC; 376e399441dSJames Smart goto out_fail_kfree; 377e399441dSJames Smart } 378e399441dSJames Smart 379e399441dSJames Smart if (!get_device(dev) && dev) { 380e399441dSJames Smart ret = -ENODEV; 381e399441dSJames Smart goto out_ida_put; 382e399441dSJames Smart } 383e399441dSJames Smart 384e399441dSJames Smart INIT_LIST_HEAD(&newrec->port_list); 385e399441dSJames Smart INIT_LIST_HEAD(&newrec->endp_list); 386e399441dSJames Smart kref_init(&newrec->ref); 387e399441dSJames Smart newrec->ops = template; 388e399441dSJames Smart newrec->dev = dev; 389e399441dSJames Smart ida_init(&newrec->endp_cnt); 390e399441dSJames Smart newrec->localport.private = &newrec[1]; 391e399441dSJames Smart newrec->localport.node_name = pinfo->node_name; 392e399441dSJames Smart newrec->localport.port_name = pinfo->port_name; 393e399441dSJames Smart newrec->localport.port_role = pinfo->port_role; 394e399441dSJames Smart newrec->localport.port_id = pinfo->port_id; 395e399441dSJames Smart newrec->localport.port_state = FC_OBJSTATE_ONLINE; 396e399441dSJames Smart newrec->localport.port_num = idx; 397e399441dSJames Smart 398e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 399e399441dSJames Smart list_add_tail(&newrec->port_list, &nvme_fc_lport_list); 400e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 401e399441dSJames Smart 402e399441dSJames Smart if (dev) 403e399441dSJames Smart dma_set_seg_boundary(dev, template->dma_boundary); 404e399441dSJames Smart 405e399441dSJames Smart *portptr = &newrec->localport; 406e399441dSJames Smart return 0; 407e399441dSJames Smart 408e399441dSJames Smart out_ida_put: 409e399441dSJames Smart ida_simple_remove(&nvme_fc_local_port_cnt, idx); 410e399441dSJames Smart out_fail_kfree: 411e399441dSJames Smart kfree(newrec); 412e399441dSJames Smart out_reghost_failed: 413e399441dSJames Smart *portptr = NULL; 414e399441dSJames Smart 415e399441dSJames Smart return ret; 416e399441dSJames Smart } 417e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_register_localport); 418e399441dSJames Smart 419e399441dSJames Smart /** 420e399441dSJames Smart * nvme_fc_unregister_localport - transport entry point called by an 421e399441dSJames Smart * LLDD to deregister/remove a previously 422e399441dSJames Smart * registered a NVME host FC port. 423e399441dSJames Smart * @localport: pointer to the (registered) local port that is to be 424e399441dSJames Smart * deregistered. 425e399441dSJames Smart * 426e399441dSJames Smart * Returns: 427e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 428e399441dSJames Smart * (ex: -ENXIO) upon failure. 429e399441dSJames Smart */ 430e399441dSJames Smart int 431e399441dSJames Smart nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) 432e399441dSJames Smart { 433e399441dSJames Smart struct nvme_fc_lport *lport = localport_to_lport(portptr); 434e399441dSJames Smart unsigned long flags; 435e399441dSJames Smart 436e399441dSJames Smart if (!portptr) 437e399441dSJames Smart return -EINVAL; 438e399441dSJames Smart 439e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 440e399441dSJames Smart 441e399441dSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 442e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 443e399441dSJames Smart return -EINVAL; 444e399441dSJames Smart } 445e399441dSJames Smart portptr->port_state = FC_OBJSTATE_DELETED; 446e399441dSJames Smart 447e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 448e399441dSJames Smart 449e399441dSJames Smart nvme_fc_lport_put(lport); 450e399441dSJames Smart 451e399441dSJames Smart return 0; 452e399441dSJames Smart } 453e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); 454e399441dSJames Smart 455e399441dSJames Smart /** 456e399441dSJames Smart * nvme_fc_register_remoteport - transport entry point called by an 457e399441dSJames Smart * LLDD to register the existence of a NVME 458e399441dSJames Smart * subsystem FC port on its fabric. 459e399441dSJames Smart * @localport: pointer to the (registered) local port that the remote 460e399441dSJames Smart * subsystem port is connected to. 461e399441dSJames Smart * @pinfo: pointer to information about the port to be registered 462e399441dSJames Smart * @rport_p: pointer to a remote port pointer. Upon success, the routine 463e399441dSJames Smart * will allocate a nvme_fc_remote_port structure and place its 464e399441dSJames Smart * address in the remote port pointer. Upon failure, remote port 465e399441dSJames Smart * pointer will be set to 0. 466e399441dSJames Smart * 467e399441dSJames Smart * Returns: 468e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 469e399441dSJames Smart * (ex: -ENXIO) upon failure. 470e399441dSJames Smart */ 471e399441dSJames Smart int 472e399441dSJames Smart nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, 473e399441dSJames Smart struct nvme_fc_port_info *pinfo, 474e399441dSJames Smart struct nvme_fc_remote_port **portptr) 475e399441dSJames Smart { 476e399441dSJames Smart struct nvme_fc_lport *lport = localport_to_lport(localport); 477e399441dSJames Smart struct nvme_fc_rport *newrec; 478e399441dSJames Smart unsigned long flags; 479e399441dSJames Smart int ret, idx; 480e399441dSJames Smart 481e399441dSJames Smart newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), 482e399441dSJames Smart GFP_KERNEL); 483e399441dSJames Smart if (!newrec) { 484e399441dSJames Smart ret = -ENOMEM; 485e399441dSJames Smart goto out_reghost_failed; 486e399441dSJames Smart } 487e399441dSJames Smart 488e399441dSJames Smart if (!nvme_fc_lport_get(lport)) { 489e399441dSJames Smart ret = -ESHUTDOWN; 490e399441dSJames Smart goto out_kfree_rport; 491e399441dSJames Smart } 492e399441dSJames Smart 493e399441dSJames Smart idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); 494e399441dSJames Smart if (idx < 0) { 495e399441dSJames Smart ret = -ENOSPC; 496e399441dSJames Smart goto out_lport_put; 497e399441dSJames Smart } 498e399441dSJames Smart 499e399441dSJames Smart INIT_LIST_HEAD(&newrec->endp_list); 500e399441dSJames Smart INIT_LIST_HEAD(&newrec->ctrl_list); 501c913a8b0SJames Smart INIT_LIST_HEAD(&newrec->ls_req_list); 502e399441dSJames Smart kref_init(&newrec->ref); 503e399441dSJames Smart spin_lock_init(&newrec->lock); 504e399441dSJames Smart newrec->remoteport.localport = &lport->localport; 505c913a8b0SJames Smart newrec->dev = lport->dev; 506c913a8b0SJames Smart newrec->lport = lport; 507e399441dSJames Smart newrec->remoteport.private = &newrec[1]; 508e399441dSJames Smart newrec->remoteport.port_role = pinfo->port_role; 509e399441dSJames Smart newrec->remoteport.node_name = pinfo->node_name; 510e399441dSJames Smart newrec->remoteport.port_name = pinfo->port_name; 511e399441dSJames Smart newrec->remoteport.port_id = pinfo->port_id; 512e399441dSJames Smart newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; 513e399441dSJames Smart newrec->remoteport.port_num = idx; 514e399441dSJames Smart 515e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 516e399441dSJames Smart list_add_tail(&newrec->endp_list, &lport->endp_list); 517e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 518e399441dSJames Smart 519e399441dSJames Smart *portptr = &newrec->remoteport; 520e399441dSJames Smart return 0; 521e399441dSJames Smart 522e399441dSJames Smart out_lport_put: 523e399441dSJames Smart nvme_fc_lport_put(lport); 524e399441dSJames Smart out_kfree_rport: 525e399441dSJames Smart kfree(newrec); 526e399441dSJames Smart out_reghost_failed: 527e399441dSJames Smart *portptr = NULL; 528e399441dSJames Smart return ret; 529e399441dSJames Smart } 530e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); 531e399441dSJames Smart 532e399441dSJames Smart static void 533e399441dSJames Smart nvme_fc_free_rport(struct kref *ref) 534e399441dSJames Smart { 535e399441dSJames Smart struct nvme_fc_rport *rport = 536e399441dSJames Smart container_of(ref, struct nvme_fc_rport, ref); 537e399441dSJames Smart struct nvme_fc_lport *lport = 538e399441dSJames Smart localport_to_lport(rport->remoteport.localport); 539e399441dSJames Smart unsigned long flags; 540e399441dSJames Smart 541e399441dSJames Smart WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); 542e399441dSJames Smart WARN_ON(!list_empty(&rport->ctrl_list)); 543e399441dSJames Smart 544e399441dSJames Smart /* remove from lport list */ 545e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 546e399441dSJames Smart list_del(&rport->endp_list); 547e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 548e399441dSJames Smart 549e399441dSJames Smart /* let the LLDD know we've finished tearing it down */ 550e399441dSJames Smart lport->ops->remoteport_delete(&rport->remoteport); 551e399441dSJames Smart 552e399441dSJames Smart ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); 553e399441dSJames Smart 554e399441dSJames Smart kfree(rport); 555e399441dSJames Smart 556e399441dSJames Smart nvme_fc_lport_put(lport); 557e399441dSJames Smart } 558e399441dSJames Smart 559e399441dSJames Smart static void 560e399441dSJames Smart nvme_fc_rport_put(struct nvme_fc_rport *rport) 561e399441dSJames Smart { 562e399441dSJames Smart kref_put(&rport->ref, nvme_fc_free_rport); 563e399441dSJames Smart } 564e399441dSJames Smart 565e399441dSJames Smart static int 566e399441dSJames Smart nvme_fc_rport_get(struct nvme_fc_rport *rport) 567e399441dSJames Smart { 568e399441dSJames Smart return kref_get_unless_zero(&rport->ref); 569e399441dSJames Smart } 570e399441dSJames Smart 5718d64daf7SJames Smart static int 5728d64daf7SJames Smart nvme_fc_abort_lsops(struct nvme_fc_rport *rport) 5738d64daf7SJames Smart { 5748d64daf7SJames Smart struct nvmefc_ls_req_op *lsop; 5758d64daf7SJames Smart unsigned long flags; 5768d64daf7SJames Smart 5778d64daf7SJames Smart restart: 5788d64daf7SJames Smart spin_lock_irqsave(&rport->lock, flags); 5798d64daf7SJames Smart 5808d64daf7SJames Smart list_for_each_entry(lsop, &rport->ls_req_list, lsreq_list) { 5818d64daf7SJames Smart if (!(lsop->flags & FCOP_FLAGS_TERMIO)) { 5828d64daf7SJames Smart lsop->flags |= FCOP_FLAGS_TERMIO; 5838d64daf7SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 5848d64daf7SJames Smart rport->lport->ops->ls_abort(&rport->lport->localport, 5858d64daf7SJames Smart &rport->remoteport, 5868d64daf7SJames Smart &lsop->ls_req); 5878d64daf7SJames Smart goto restart; 5888d64daf7SJames Smart } 5898d64daf7SJames Smart } 5908d64daf7SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 5918d64daf7SJames Smart 5928d64daf7SJames Smart return 0; 5938d64daf7SJames Smart } 5948d64daf7SJames Smart 595e399441dSJames Smart /** 596e399441dSJames Smart * nvme_fc_unregister_remoteport - transport entry point called by an 597e399441dSJames Smart * LLDD to deregister/remove a previously 598e399441dSJames Smart * registered a NVME subsystem FC port. 599e399441dSJames Smart * @remoteport: pointer to the (registered) remote port that is to be 600e399441dSJames Smart * deregistered. 601e399441dSJames Smart * 602e399441dSJames Smart * Returns: 603e399441dSJames Smart * a completion status. Must be 0 upon success; a negative errno 604e399441dSJames Smart * (ex: -ENXIO) upon failure. 605e399441dSJames Smart */ 606e399441dSJames Smart int 607e399441dSJames Smart nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) 608e399441dSJames Smart { 609e399441dSJames Smart struct nvme_fc_rport *rport = remoteport_to_rport(portptr); 610e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 611e399441dSJames Smart unsigned long flags; 612e399441dSJames Smart 613e399441dSJames Smart if (!portptr) 614e399441dSJames Smart return -EINVAL; 615e399441dSJames Smart 616e399441dSJames Smart spin_lock_irqsave(&rport->lock, flags); 617e399441dSJames Smart 618e399441dSJames Smart if (portptr->port_state != FC_OBJSTATE_ONLINE) { 619e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 620e399441dSJames Smart return -EINVAL; 621e399441dSJames Smart } 622e399441dSJames Smart portptr->port_state = FC_OBJSTATE_DELETED; 623e399441dSJames Smart 624e399441dSJames Smart /* tear down all associations to the remote port */ 625e399441dSJames Smart list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) 626e399441dSJames Smart __nvme_fc_del_ctrl(ctrl); 627e399441dSJames Smart 628e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 629e399441dSJames Smart 6308d64daf7SJames Smart nvme_fc_abort_lsops(rport); 6318d64daf7SJames Smart 632e399441dSJames Smart nvme_fc_rport_put(rport); 633e399441dSJames Smart return 0; 634e399441dSJames Smart } 635e399441dSJames Smart EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); 636e399441dSJames Smart 637e399441dSJames Smart 638e399441dSJames Smart /* *********************** FC-NVME DMA Handling **************************** */ 639e399441dSJames Smart 640e399441dSJames Smart /* 641e399441dSJames Smart * The fcloop device passes in a NULL device pointer. Real LLD's will 642e399441dSJames Smart * pass in a valid device pointer. If NULL is passed to the dma mapping 643e399441dSJames Smart * routines, depending on the platform, it may or may not succeed, and 644e399441dSJames Smart * may crash. 645e399441dSJames Smart * 646e399441dSJames Smart * As such: 647e399441dSJames Smart * Wrapper all the dma routines and check the dev pointer. 648e399441dSJames Smart * 649e399441dSJames Smart * If simple mappings (return just a dma address, we'll noop them, 650e399441dSJames Smart * returning a dma address of 0. 651e399441dSJames Smart * 652e399441dSJames Smart * On more complex mappings (dma_map_sg), a pseudo routine fills 653e399441dSJames Smart * in the scatter list, setting all dma addresses to 0. 654e399441dSJames Smart */ 655e399441dSJames Smart 656e399441dSJames Smart static inline dma_addr_t 657e399441dSJames Smart fc_dma_map_single(struct device *dev, void *ptr, size_t size, 658e399441dSJames Smart enum dma_data_direction dir) 659e399441dSJames Smart { 660e399441dSJames Smart return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; 661e399441dSJames Smart } 662e399441dSJames Smart 663e399441dSJames Smart static inline int 664e399441dSJames Smart fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 665e399441dSJames Smart { 666e399441dSJames Smart return dev ? dma_mapping_error(dev, dma_addr) : 0; 667e399441dSJames Smart } 668e399441dSJames Smart 669e399441dSJames Smart static inline void 670e399441dSJames Smart fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, 671e399441dSJames Smart enum dma_data_direction dir) 672e399441dSJames Smart { 673e399441dSJames Smart if (dev) 674e399441dSJames Smart dma_unmap_single(dev, addr, size, dir); 675e399441dSJames Smart } 676e399441dSJames Smart 677e399441dSJames Smart static inline void 678e399441dSJames Smart fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, 679e399441dSJames Smart enum dma_data_direction dir) 680e399441dSJames Smart { 681e399441dSJames Smart if (dev) 682e399441dSJames Smart dma_sync_single_for_cpu(dev, addr, size, dir); 683e399441dSJames Smart } 684e399441dSJames Smart 685e399441dSJames Smart static inline void 686e399441dSJames Smart fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, 687e399441dSJames Smart enum dma_data_direction dir) 688e399441dSJames Smart { 689e399441dSJames Smart if (dev) 690e399441dSJames Smart dma_sync_single_for_device(dev, addr, size, dir); 691e399441dSJames Smart } 692e399441dSJames Smart 693e399441dSJames Smart /* pseudo dma_map_sg call */ 694e399441dSJames Smart static int 695e399441dSJames Smart fc_map_sg(struct scatterlist *sg, int nents) 696e399441dSJames Smart { 697e399441dSJames Smart struct scatterlist *s; 698e399441dSJames Smart int i; 699e399441dSJames Smart 700e399441dSJames Smart WARN_ON(nents == 0 || sg[0].length == 0); 701e399441dSJames Smart 702e399441dSJames Smart for_each_sg(sg, s, nents, i) { 703e399441dSJames Smart s->dma_address = 0L; 704e399441dSJames Smart #ifdef CONFIG_NEED_SG_DMA_LENGTH 705e399441dSJames Smart s->dma_length = s->length; 706e399441dSJames Smart #endif 707e399441dSJames Smart } 708e399441dSJames Smart return nents; 709e399441dSJames Smart } 710e399441dSJames Smart 711e399441dSJames Smart static inline int 712e399441dSJames Smart fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 713e399441dSJames Smart enum dma_data_direction dir) 714e399441dSJames Smart { 715e399441dSJames Smart return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); 716e399441dSJames Smart } 717e399441dSJames Smart 718e399441dSJames Smart static inline void 719e399441dSJames Smart fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, 720e399441dSJames Smart enum dma_data_direction dir) 721e399441dSJames Smart { 722e399441dSJames Smart if (dev) 723e399441dSJames Smart dma_unmap_sg(dev, sg, nents, dir); 724e399441dSJames Smart } 725e399441dSJames Smart 726e399441dSJames Smart 727e399441dSJames Smart /* *********************** FC-NVME LS Handling **************************** */ 728e399441dSJames Smart 729e399441dSJames Smart static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); 730e399441dSJames Smart static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); 731e399441dSJames Smart 732e399441dSJames Smart 733e399441dSJames Smart static void 734c913a8b0SJames Smart __nvme_fc_finish_ls_req(struct nvmefc_ls_req_op *lsop) 735e399441dSJames Smart { 736c913a8b0SJames Smart struct nvme_fc_rport *rport = lsop->rport; 737e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 738e399441dSJames Smart unsigned long flags; 739e399441dSJames Smart 740c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 741e399441dSJames Smart 742e399441dSJames Smart if (!lsop->req_queued) { 743c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 744e399441dSJames Smart return; 745e399441dSJames Smart } 746e399441dSJames Smart 747e399441dSJames Smart list_del(&lsop->lsreq_list); 748e399441dSJames Smart 749e399441dSJames Smart lsop->req_queued = false; 750e399441dSJames Smart 751c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 752e399441dSJames Smart 753c913a8b0SJames Smart fc_dma_unmap_single(rport->dev, lsreq->rqstdma, 754e399441dSJames Smart (lsreq->rqstlen + lsreq->rsplen), 755e399441dSJames Smart DMA_BIDIRECTIONAL); 756e399441dSJames Smart 757c913a8b0SJames Smart nvme_fc_rport_put(rport); 758e399441dSJames Smart } 759e399441dSJames Smart 760e399441dSJames Smart static int 761c913a8b0SJames Smart __nvme_fc_send_ls_req(struct nvme_fc_rport *rport, 762e399441dSJames Smart struct nvmefc_ls_req_op *lsop, 763e399441dSJames Smart void (*done)(struct nvmefc_ls_req *req, int status)) 764e399441dSJames Smart { 765e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 766e399441dSJames Smart unsigned long flags; 767c913a8b0SJames Smart int ret = 0; 768e399441dSJames Smart 769c913a8b0SJames Smart if (rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 770c913a8b0SJames Smart return -ECONNREFUSED; 771c913a8b0SJames Smart 772c913a8b0SJames Smart if (!nvme_fc_rport_get(rport)) 773e399441dSJames Smart return -ESHUTDOWN; 774e399441dSJames Smart 775e399441dSJames Smart lsreq->done = done; 776c913a8b0SJames Smart lsop->rport = rport; 777e399441dSJames Smart lsop->req_queued = false; 778e399441dSJames Smart INIT_LIST_HEAD(&lsop->lsreq_list); 779e399441dSJames Smart init_completion(&lsop->ls_done); 780e399441dSJames Smart 781c913a8b0SJames Smart lsreq->rqstdma = fc_dma_map_single(rport->dev, lsreq->rqstaddr, 782e399441dSJames Smart lsreq->rqstlen + lsreq->rsplen, 783e399441dSJames Smart DMA_BIDIRECTIONAL); 784c913a8b0SJames Smart if (fc_dma_mapping_error(rport->dev, lsreq->rqstdma)) { 785c913a8b0SJames Smart ret = -EFAULT; 786c913a8b0SJames Smart goto out_putrport; 787e399441dSJames Smart } 788e399441dSJames Smart lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; 789e399441dSJames Smart 790c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 791e399441dSJames Smart 792c913a8b0SJames Smart list_add_tail(&lsop->lsreq_list, &rport->ls_req_list); 793e399441dSJames Smart 794e399441dSJames Smart lsop->req_queued = true; 795e399441dSJames Smart 796c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 797e399441dSJames Smart 798c913a8b0SJames Smart ret = rport->lport->ops->ls_req(&rport->lport->localport, 799c913a8b0SJames Smart &rport->remoteport, lsreq); 800e399441dSJames Smart if (ret) 801c913a8b0SJames Smart goto out_unlink; 802c913a8b0SJames Smart 803c913a8b0SJames Smart return 0; 804c913a8b0SJames Smart 805c913a8b0SJames Smart out_unlink: 806e399441dSJames Smart lsop->ls_error = ret; 807c913a8b0SJames Smart spin_lock_irqsave(&rport->lock, flags); 808c913a8b0SJames Smart lsop->req_queued = false; 809c913a8b0SJames Smart list_del(&lsop->lsreq_list); 810c913a8b0SJames Smart spin_unlock_irqrestore(&rport->lock, flags); 811c913a8b0SJames Smart fc_dma_unmap_single(rport->dev, lsreq->rqstdma, 812c913a8b0SJames Smart (lsreq->rqstlen + lsreq->rsplen), 813c913a8b0SJames Smart DMA_BIDIRECTIONAL); 814c913a8b0SJames Smart out_putrport: 815c913a8b0SJames Smart nvme_fc_rport_put(rport); 816e399441dSJames Smart 817e399441dSJames Smart return ret; 818e399441dSJames Smart } 819e399441dSJames Smart 820e399441dSJames Smart static void 821e399441dSJames Smart nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) 822e399441dSJames Smart { 823e399441dSJames Smart struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); 824e399441dSJames Smart 825e399441dSJames Smart lsop->ls_error = status; 826e399441dSJames Smart complete(&lsop->ls_done); 827e399441dSJames Smart } 828e399441dSJames Smart 829e399441dSJames Smart static int 830c913a8b0SJames Smart nvme_fc_send_ls_req(struct nvme_fc_rport *rport, struct nvmefc_ls_req_op *lsop) 831e399441dSJames Smart { 832e399441dSJames Smart struct nvmefc_ls_req *lsreq = &lsop->ls_req; 833e399441dSJames Smart struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; 834e399441dSJames Smart int ret; 835e399441dSJames Smart 836c913a8b0SJames Smart ret = __nvme_fc_send_ls_req(rport, lsop, nvme_fc_send_ls_req_done); 837e399441dSJames Smart 838c913a8b0SJames Smart if (!ret) { 839e399441dSJames Smart /* 840e399441dSJames Smart * No timeout/not interruptible as we need the struct 841e399441dSJames Smart * to exist until the lldd calls us back. Thus mandate 842e399441dSJames Smart * wait until driver calls back. lldd responsible for 843e399441dSJames Smart * the timeout action 844e399441dSJames Smart */ 845e399441dSJames Smart wait_for_completion(&lsop->ls_done); 846e399441dSJames Smart 847c913a8b0SJames Smart __nvme_fc_finish_ls_req(lsop); 848e399441dSJames Smart 849c913a8b0SJames Smart ret = lsop->ls_error; 850e399441dSJames Smart } 851e399441dSJames Smart 852c913a8b0SJames Smart if (ret) 853c913a8b0SJames Smart return ret; 854c913a8b0SJames Smart 855e399441dSJames Smart /* ACC or RJT payload ? */ 856e399441dSJames Smart if (rjt->w0.ls_cmd == FCNVME_LS_RJT) 857e399441dSJames Smart return -ENXIO; 858e399441dSJames Smart 859e399441dSJames Smart return 0; 860e399441dSJames Smart } 861e399441dSJames Smart 862c913a8b0SJames Smart static int 863c913a8b0SJames Smart nvme_fc_send_ls_req_async(struct nvme_fc_rport *rport, 864e399441dSJames Smart struct nvmefc_ls_req_op *lsop, 865e399441dSJames Smart void (*done)(struct nvmefc_ls_req *req, int status)) 866e399441dSJames Smart { 867e399441dSJames Smart /* don't wait for completion */ 868e399441dSJames Smart 869c913a8b0SJames Smart return __nvme_fc_send_ls_req(rport, lsop, done); 870e399441dSJames Smart } 871e399441dSJames Smart 872e399441dSJames Smart /* Validation Error indexes into the string table below */ 873e399441dSJames Smart enum { 874e399441dSJames Smart VERR_NO_ERROR = 0, 875e399441dSJames Smart VERR_LSACC = 1, 876e399441dSJames Smart VERR_LSDESC_RQST = 2, 877e399441dSJames Smart VERR_LSDESC_RQST_LEN = 3, 878e399441dSJames Smart VERR_ASSOC_ID = 4, 879e399441dSJames Smart VERR_ASSOC_ID_LEN = 5, 880e399441dSJames Smart VERR_CONN_ID = 6, 881e399441dSJames Smart VERR_CONN_ID_LEN = 7, 882e399441dSJames Smart VERR_CR_ASSOC = 8, 883e399441dSJames Smart VERR_CR_ASSOC_ACC_LEN = 9, 884e399441dSJames Smart VERR_CR_CONN = 10, 885e399441dSJames Smart VERR_CR_CONN_ACC_LEN = 11, 886e399441dSJames Smart VERR_DISCONN = 12, 887e399441dSJames Smart VERR_DISCONN_ACC_LEN = 13, 888e399441dSJames Smart }; 889e399441dSJames Smart 890e399441dSJames Smart static char *validation_errors[] = { 891e399441dSJames Smart "OK", 892e399441dSJames Smart "Not LS_ACC", 893e399441dSJames Smart "Not LSDESC_RQST", 894e399441dSJames Smart "Bad LSDESC_RQST Length", 895e399441dSJames Smart "Not Association ID", 896e399441dSJames Smart "Bad Association ID Length", 897e399441dSJames Smart "Not Connection ID", 898e399441dSJames Smart "Bad Connection ID Length", 899e399441dSJames Smart "Not CR_ASSOC Rqst", 900e399441dSJames Smart "Bad CR_ASSOC ACC Length", 901e399441dSJames Smart "Not CR_CONN Rqst", 902e399441dSJames Smart "Bad CR_CONN ACC Length", 903e399441dSJames Smart "Not Disconnect Rqst", 904e399441dSJames Smart "Bad Disconnect ACC Length", 905e399441dSJames Smart }; 906e399441dSJames Smart 907e399441dSJames Smart static int 908e399441dSJames Smart nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, 909e399441dSJames Smart struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) 910e399441dSJames Smart { 911e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 912e399441dSJames Smart struct nvmefc_ls_req *lsreq; 913e399441dSJames Smart struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; 914e399441dSJames Smart struct fcnvme_ls_cr_assoc_acc *assoc_acc; 915e399441dSJames Smart int ret, fcret = 0; 916e399441dSJames Smart 917e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 918e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 919e399441dSJames Smart sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL); 920e399441dSJames Smart if (!lsop) { 921e399441dSJames Smart ret = -ENOMEM; 922e399441dSJames Smart goto out_no_memory; 923e399441dSJames Smart } 924e399441dSJames Smart lsreq = &lsop->ls_req; 925e399441dSJames Smart 926e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 927e399441dSJames Smart assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *) 928e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 929e399441dSJames Smart assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; 930e399441dSJames Smart 931e399441dSJames Smart assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; 932e399441dSJames Smart assoc_rqst->desc_list_len = 933e399441dSJames Smart cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); 934e399441dSJames Smart 935e399441dSJames Smart assoc_rqst->assoc_cmd.desc_tag = 936e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); 937e399441dSJames Smart assoc_rqst->assoc_cmd.desc_len = 938e399441dSJames Smart fcnvme_lsdesc_len( 939e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); 940e399441dSJames Smart 941e399441dSJames Smart assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); 942e399441dSJames Smart assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize); 943e399441dSJames Smart /* Linux supports only Dynamic controllers */ 944e399441dSJames Smart assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); 9458e412263SChristoph Hellwig uuid_copy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id); 946e399441dSJames Smart strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, 947e399441dSJames Smart min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); 948e399441dSJames Smart strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, 949e399441dSJames Smart min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); 950e399441dSJames Smart 951e399441dSJames Smart lsop->queue = queue; 952e399441dSJames Smart lsreq->rqstaddr = assoc_rqst; 953e399441dSJames Smart lsreq->rqstlen = sizeof(*assoc_rqst); 954e399441dSJames Smart lsreq->rspaddr = assoc_acc; 955e399441dSJames Smart lsreq->rsplen = sizeof(*assoc_acc); 956e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 957e399441dSJames Smart 958c913a8b0SJames Smart ret = nvme_fc_send_ls_req(ctrl->rport, lsop); 959e399441dSJames Smart if (ret) 960e399441dSJames Smart goto out_free_buffer; 961e399441dSJames Smart 962e399441dSJames Smart /* process connect LS completion */ 963e399441dSJames Smart 964e399441dSJames Smart /* validate the ACC response */ 965e399441dSJames Smart if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) 966e399441dSJames Smart fcret = VERR_LSACC; 967f77fc87cSJames Smart else if (assoc_acc->hdr.desc_list_len != 968e399441dSJames Smart fcnvme_lsdesc_len( 969e399441dSJames Smart sizeof(struct fcnvme_ls_cr_assoc_acc))) 970e399441dSJames Smart fcret = VERR_CR_ASSOC_ACC_LEN; 971f77fc87cSJames Smart else if (assoc_acc->hdr.rqst.desc_tag != 972f77fc87cSJames Smart cpu_to_be32(FCNVME_LSDESC_RQST)) 973e399441dSJames Smart fcret = VERR_LSDESC_RQST; 974e399441dSJames Smart else if (assoc_acc->hdr.rqst.desc_len != 975e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) 976e399441dSJames Smart fcret = VERR_LSDESC_RQST_LEN; 977e399441dSJames Smart else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) 978e399441dSJames Smart fcret = VERR_CR_ASSOC; 979e399441dSJames Smart else if (assoc_acc->associd.desc_tag != 980e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) 981e399441dSJames Smart fcret = VERR_ASSOC_ID; 982e399441dSJames Smart else if (assoc_acc->associd.desc_len != 983e399441dSJames Smart fcnvme_lsdesc_len( 984e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id))) 985e399441dSJames Smart fcret = VERR_ASSOC_ID_LEN; 986e399441dSJames Smart else if (assoc_acc->connectid.desc_tag != 987e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CONN_ID)) 988e399441dSJames Smart fcret = VERR_CONN_ID; 989e399441dSJames Smart else if (assoc_acc->connectid.desc_len != 990e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) 991e399441dSJames Smart fcret = VERR_CONN_ID_LEN; 992e399441dSJames Smart 993e399441dSJames Smart if (fcret) { 994e399441dSJames Smart ret = -EBADF; 995e399441dSJames Smart dev_err(ctrl->dev, 996e399441dSJames Smart "q %d connect failed: %s\n", 997e399441dSJames Smart queue->qnum, validation_errors[fcret]); 998e399441dSJames Smart } else { 999e399441dSJames Smart ctrl->association_id = 1000e399441dSJames Smart be64_to_cpu(assoc_acc->associd.association_id); 1001e399441dSJames Smart queue->connection_id = 1002e399441dSJames Smart be64_to_cpu(assoc_acc->connectid.connection_id); 1003e399441dSJames Smart set_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1004e399441dSJames Smart } 1005e399441dSJames Smart 1006e399441dSJames Smart out_free_buffer: 1007e399441dSJames Smart kfree(lsop); 1008e399441dSJames Smart out_no_memory: 1009e399441dSJames Smart if (ret) 1010e399441dSJames Smart dev_err(ctrl->dev, 1011e399441dSJames Smart "queue %d connect admin queue failed (%d).\n", 1012e399441dSJames Smart queue->qnum, ret); 1013e399441dSJames Smart return ret; 1014e399441dSJames Smart } 1015e399441dSJames Smart 1016e399441dSJames Smart static int 1017e399441dSJames Smart nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, 1018e399441dSJames Smart u16 qsize, u16 ersp_ratio) 1019e399441dSJames Smart { 1020e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1021e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1022e399441dSJames Smart struct fcnvme_ls_cr_conn_rqst *conn_rqst; 1023e399441dSJames Smart struct fcnvme_ls_cr_conn_acc *conn_acc; 1024e399441dSJames Smart int ret, fcret = 0; 1025e399441dSJames Smart 1026e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1027e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 1028e399441dSJames Smart sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL); 1029e399441dSJames Smart if (!lsop) { 1030e399441dSJames Smart ret = -ENOMEM; 1031e399441dSJames Smart goto out_no_memory; 1032e399441dSJames Smart } 1033e399441dSJames Smart lsreq = &lsop->ls_req; 1034e399441dSJames Smart 1035e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 1036e399441dSJames Smart conn_rqst = (struct fcnvme_ls_cr_conn_rqst *) 1037e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 1038e399441dSJames Smart conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; 1039e399441dSJames Smart 1040e399441dSJames Smart conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; 1041e399441dSJames Smart conn_rqst->desc_list_len = cpu_to_be32( 1042e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id) + 1043e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); 1044e399441dSJames Smart 1045e399441dSJames Smart conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); 1046e399441dSJames Smart conn_rqst->associd.desc_len = 1047e399441dSJames Smart fcnvme_lsdesc_len( 1048e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id)); 1049e399441dSJames Smart conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); 1050e399441dSJames Smart conn_rqst->connect_cmd.desc_tag = 1051e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); 1052e399441dSJames Smart conn_rqst->connect_cmd.desc_len = 1053e399441dSJames Smart fcnvme_lsdesc_len( 1054e399441dSJames Smart sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); 1055e399441dSJames Smart conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); 1056e399441dSJames Smart conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); 1057e399441dSJames Smart conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize); 1058e399441dSJames Smart 1059e399441dSJames Smart lsop->queue = queue; 1060e399441dSJames Smart lsreq->rqstaddr = conn_rqst; 1061e399441dSJames Smart lsreq->rqstlen = sizeof(*conn_rqst); 1062e399441dSJames Smart lsreq->rspaddr = conn_acc; 1063e399441dSJames Smart lsreq->rsplen = sizeof(*conn_acc); 1064e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 1065e399441dSJames Smart 1066c913a8b0SJames Smart ret = nvme_fc_send_ls_req(ctrl->rport, lsop); 1067e399441dSJames Smart if (ret) 1068e399441dSJames Smart goto out_free_buffer; 1069e399441dSJames Smart 1070e399441dSJames Smart /* process connect LS completion */ 1071e399441dSJames Smart 1072e399441dSJames Smart /* validate the ACC response */ 1073e399441dSJames Smart if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) 1074e399441dSJames Smart fcret = VERR_LSACC; 1075f77fc87cSJames Smart else if (conn_acc->hdr.desc_list_len != 1076e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) 1077e399441dSJames Smart fcret = VERR_CR_CONN_ACC_LEN; 1078f77fc87cSJames Smart else if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) 1079e399441dSJames Smart fcret = VERR_LSDESC_RQST; 1080e399441dSJames Smart else if (conn_acc->hdr.rqst.desc_len != 1081e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) 1082e399441dSJames Smart fcret = VERR_LSDESC_RQST_LEN; 1083e399441dSJames Smart else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) 1084e399441dSJames Smart fcret = VERR_CR_CONN; 1085e399441dSJames Smart else if (conn_acc->connectid.desc_tag != 1086e399441dSJames Smart cpu_to_be32(FCNVME_LSDESC_CONN_ID)) 1087e399441dSJames Smart fcret = VERR_CONN_ID; 1088e399441dSJames Smart else if (conn_acc->connectid.desc_len != 1089e399441dSJames Smart fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) 1090e399441dSJames Smart fcret = VERR_CONN_ID_LEN; 1091e399441dSJames Smart 1092e399441dSJames Smart if (fcret) { 1093e399441dSJames Smart ret = -EBADF; 1094e399441dSJames Smart dev_err(ctrl->dev, 1095e399441dSJames Smart "q %d connect failed: %s\n", 1096e399441dSJames Smart queue->qnum, validation_errors[fcret]); 1097e399441dSJames Smart } else { 1098e399441dSJames Smart queue->connection_id = 1099e399441dSJames Smart be64_to_cpu(conn_acc->connectid.connection_id); 1100e399441dSJames Smart set_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1101e399441dSJames Smart } 1102e399441dSJames Smart 1103e399441dSJames Smart out_free_buffer: 1104e399441dSJames Smart kfree(lsop); 1105e399441dSJames Smart out_no_memory: 1106e399441dSJames Smart if (ret) 1107e399441dSJames Smart dev_err(ctrl->dev, 1108e399441dSJames Smart "queue %d connect command failed (%d).\n", 1109e399441dSJames Smart queue->qnum, ret); 1110e399441dSJames Smart return ret; 1111e399441dSJames Smart } 1112e399441dSJames Smart 1113e399441dSJames Smart static void 1114e399441dSJames Smart nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) 1115e399441dSJames Smart { 1116e399441dSJames Smart struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); 1117e399441dSJames Smart 1118c913a8b0SJames Smart __nvme_fc_finish_ls_req(lsop); 1119e399441dSJames Smart 1120e399441dSJames Smart /* fc-nvme iniator doesn't care about success or failure of cmd */ 1121e399441dSJames Smart 1122e399441dSJames Smart kfree(lsop); 1123e399441dSJames Smart } 1124e399441dSJames Smart 1125e399441dSJames Smart /* 1126e399441dSJames Smart * This routine sends a FC-NVME LS to disconnect (aka terminate) 1127e399441dSJames Smart * the FC-NVME Association. Terminating the association also 1128e399441dSJames Smart * terminates the FC-NVME connections (per queue, both admin and io 1129e399441dSJames Smart * queues) that are part of the association. E.g. things are torn 1130e399441dSJames Smart * down, and the related FC-NVME Association ID and Connection IDs 1131e399441dSJames Smart * become invalid. 1132e399441dSJames Smart * 1133e399441dSJames Smart * The behavior of the fc-nvme initiator is such that it's 1134e399441dSJames Smart * understanding of the association and connections will implicitly 1135e399441dSJames Smart * be torn down. The action is implicit as it may be due to a loss of 1136e399441dSJames Smart * connectivity with the fc-nvme target, so you may never get a 1137e399441dSJames Smart * response even if you tried. As such, the action of this routine 1138e399441dSJames Smart * is to asynchronously send the LS, ignore any results of the LS, and 1139e399441dSJames Smart * continue on with terminating the association. If the fc-nvme target 1140e399441dSJames Smart * is present and receives the LS, it too can tear down. 1141e399441dSJames Smart */ 1142e399441dSJames Smart static void 1143e399441dSJames Smart nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) 1144e399441dSJames Smart { 1145e399441dSJames Smart struct fcnvme_ls_disconnect_rqst *discon_rqst; 1146e399441dSJames Smart struct fcnvme_ls_disconnect_acc *discon_acc; 1147e399441dSJames Smart struct nvmefc_ls_req_op *lsop; 1148e399441dSJames Smart struct nvmefc_ls_req *lsreq; 1149c913a8b0SJames Smart int ret; 1150e399441dSJames Smart 1151e399441dSJames Smart lsop = kzalloc((sizeof(*lsop) + 1152e399441dSJames Smart ctrl->lport->ops->lsrqst_priv_sz + 1153e399441dSJames Smart sizeof(*discon_rqst) + sizeof(*discon_acc)), 1154e399441dSJames Smart GFP_KERNEL); 1155e399441dSJames Smart if (!lsop) 1156e399441dSJames Smart /* couldn't sent it... too bad */ 1157e399441dSJames Smart return; 1158e399441dSJames Smart 1159e399441dSJames Smart lsreq = &lsop->ls_req; 1160e399441dSJames Smart 1161e399441dSJames Smart lsreq->private = (void *)&lsop[1]; 1162e399441dSJames Smart discon_rqst = (struct fcnvme_ls_disconnect_rqst *) 1163e399441dSJames Smart (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); 1164e399441dSJames Smart discon_acc = (struct fcnvme_ls_disconnect_acc *)&discon_rqst[1]; 1165e399441dSJames Smart 1166e399441dSJames Smart discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT; 1167e399441dSJames Smart discon_rqst->desc_list_len = cpu_to_be32( 1168e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id) + 1169e399441dSJames Smart sizeof(struct fcnvme_lsdesc_disconn_cmd)); 1170e399441dSJames Smart 1171e399441dSJames Smart discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); 1172e399441dSJames Smart discon_rqst->associd.desc_len = 1173e399441dSJames Smart fcnvme_lsdesc_len( 1174e399441dSJames Smart sizeof(struct fcnvme_lsdesc_assoc_id)); 1175e399441dSJames Smart 1176e399441dSJames Smart discon_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); 1177e399441dSJames Smart 1178e399441dSJames Smart discon_rqst->discon_cmd.desc_tag = cpu_to_be32( 1179e399441dSJames Smart FCNVME_LSDESC_DISCONN_CMD); 1180e399441dSJames Smart discon_rqst->discon_cmd.desc_len = 1181e399441dSJames Smart fcnvme_lsdesc_len( 1182e399441dSJames Smart sizeof(struct fcnvme_lsdesc_disconn_cmd)); 1183e399441dSJames Smart discon_rqst->discon_cmd.scope = FCNVME_DISCONN_ASSOCIATION; 1184e399441dSJames Smart discon_rqst->discon_cmd.id = cpu_to_be64(ctrl->association_id); 1185e399441dSJames Smart 1186e399441dSJames Smart lsreq->rqstaddr = discon_rqst; 1187e399441dSJames Smart lsreq->rqstlen = sizeof(*discon_rqst); 1188e399441dSJames Smart lsreq->rspaddr = discon_acc; 1189e399441dSJames Smart lsreq->rsplen = sizeof(*discon_acc); 1190e399441dSJames Smart lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; 1191e399441dSJames Smart 1192c913a8b0SJames Smart ret = nvme_fc_send_ls_req_async(ctrl->rport, lsop, 1193c913a8b0SJames Smart nvme_fc_disconnect_assoc_done); 1194c913a8b0SJames Smart if (ret) 1195c913a8b0SJames Smart kfree(lsop); 1196e399441dSJames Smart 1197e399441dSJames Smart /* only meaningful part to terminating the association */ 1198e399441dSJames Smart ctrl->association_id = 0; 1199e399441dSJames Smart } 1200e399441dSJames Smart 1201e399441dSJames Smart 1202e399441dSJames Smart /* *********************** NVME Ctrl Routines **************************** */ 1203e399441dSJames Smart 120478a7ac26SJames Smart static void __nvme_fc_final_op_cleanup(struct request *rq); 1205f874d5d0SJames Smart static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg); 1206e399441dSJames Smart 1207e399441dSJames Smart static int 1208e399441dSJames Smart nvme_fc_reinit_request(void *data, struct request *rq) 1209e399441dSJames Smart { 1210e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1211e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 1212e399441dSJames Smart 1213e399441dSJames Smart memset(cmdiu, 0, sizeof(*cmdiu)); 1214e399441dSJames Smart cmdiu->scsi_id = NVME_CMD_SCSI_ID; 1215e399441dSJames Smart cmdiu->fc_id = NVME_CMD_FC_ID; 1216e399441dSJames Smart cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); 1217e399441dSJames Smart memset(&op->rsp_iu, 0, sizeof(op->rsp_iu)); 1218e399441dSJames Smart 1219e399441dSJames Smart return 0; 1220e399441dSJames Smart } 1221e399441dSJames Smart 1222e399441dSJames Smart static void 1223e399441dSJames Smart __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, 1224e399441dSJames Smart struct nvme_fc_fcp_op *op) 1225e399441dSJames Smart { 1226e399441dSJames Smart fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, 1227e399441dSJames Smart sizeof(op->rsp_iu), DMA_FROM_DEVICE); 1228e399441dSJames Smart fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, 1229e399441dSJames Smart sizeof(op->cmd_iu), DMA_TO_DEVICE); 1230e399441dSJames Smart 1231e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_UNINIT); 1232e399441dSJames Smart } 1233e399441dSJames Smart 1234e399441dSJames Smart static void 1235d6296d39SChristoph Hellwig nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq, 1236d6296d39SChristoph Hellwig unsigned int hctx_idx) 1237e399441dSJames Smart { 1238e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1239e399441dSJames Smart 1240d6296d39SChristoph Hellwig return __nvme_fc_exit_request(set->driver_data, op); 1241e399441dSJames Smart } 1242e399441dSJames Smart 124378a7ac26SJames Smart static int 124478a7ac26SJames Smart __nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) 124578a7ac26SJames Smart { 124678a7ac26SJames Smart int state; 124778a7ac26SJames Smart 124878a7ac26SJames Smart state = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); 124978a7ac26SJames Smart if (state != FCPOP_STATE_ACTIVE) { 125078a7ac26SJames Smart atomic_set(&op->state, state); 125178a7ac26SJames Smart return -ECANCELED; 125278a7ac26SJames Smart } 125378a7ac26SJames Smart 125478a7ac26SJames Smart ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, 125578a7ac26SJames Smart &ctrl->rport->remoteport, 125678a7ac26SJames Smart op->queue->lldd_handle, 125778a7ac26SJames Smart &op->fcp_req); 125878a7ac26SJames Smart 125978a7ac26SJames Smart return 0; 126078a7ac26SJames Smart } 126178a7ac26SJames Smart 1262e399441dSJames Smart static void 126378a7ac26SJames Smart nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl) 1264e399441dSJames Smart { 1265e399441dSJames Smart struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; 126678a7ac26SJames Smart unsigned long flags; 126778a7ac26SJames Smart int i, ret; 1268e399441dSJames Smart 1269e399441dSJames Smart for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { 127078a7ac26SJames Smart if (atomic_read(&aen_op->state) != FCPOP_STATE_ACTIVE) 1271e399441dSJames Smart continue; 127278a7ac26SJames Smart 127378a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 127461bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 127561bff8efSJames Smart ctrl->iocnt++; 127678a7ac26SJames Smart aen_op->flags |= FCOP_FLAGS_TERMIO; 127761bff8efSJames Smart } 127878a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 127978a7ac26SJames Smart 128078a7ac26SJames Smart ret = __nvme_fc_abort_op(ctrl, aen_op); 128178a7ac26SJames Smart if (ret) { 128278a7ac26SJames Smart /* 128378a7ac26SJames Smart * if __nvme_fc_abort_op failed the io wasn't 128478a7ac26SJames Smart * active. Thus this call path is running in 128578a7ac26SJames Smart * parallel to the io complete. Treat as non-error. 128678a7ac26SJames Smart */ 128778a7ac26SJames Smart 128878a7ac26SJames Smart /* back out the flags/counters */ 128978a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 129061bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 129161bff8efSJames Smart ctrl->iocnt--; 129278a7ac26SJames Smart aen_op->flags &= ~FCOP_FLAGS_TERMIO; 129378a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 129478a7ac26SJames Smart return; 1295e399441dSJames Smart } 1296e399441dSJames Smart } 129778a7ac26SJames Smart } 129878a7ac26SJames Smart 129978a7ac26SJames Smart static inline int 130078a7ac26SJames Smart __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl, 130178a7ac26SJames Smart struct nvme_fc_fcp_op *op) 130278a7ac26SJames Smart { 130378a7ac26SJames Smart unsigned long flags; 130478a7ac26SJames Smart bool complete_rq = false; 130578a7ac26SJames Smart 130678a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 130761bff8efSJames Smart if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { 130836715cf4SJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 130936715cf4SJames Smart if (!--ctrl->iocnt) 131036715cf4SJames Smart wake_up(&ctrl->ioabort_wait); 131136715cf4SJames Smart } 131261bff8efSJames Smart } 131378a7ac26SJames Smart if (op->flags & FCOP_FLAGS_RELEASED) 131478a7ac26SJames Smart complete_rq = true; 131578a7ac26SJames Smart else 131678a7ac26SJames Smart op->flags |= FCOP_FLAGS_COMPLETE; 131778a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 131878a7ac26SJames Smart 131978a7ac26SJames Smart return complete_rq; 132078a7ac26SJames Smart } 1321e399441dSJames Smart 1322baee29acSChristoph Hellwig static void 1323e399441dSJames Smart nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) 1324e399441dSJames Smart { 1325e399441dSJames Smart struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); 1326e399441dSJames Smart struct request *rq = op->rq; 1327e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 1328e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 1329e399441dSJames Smart struct nvme_fc_queue *queue = op->queue; 1330e399441dSJames Smart struct nvme_completion *cqe = &op->rsp_iu.cqe; 1331458f280dSJames Smart struct nvme_command *sqe = &op->cmd_iu.sqe; 1332d663b69fSChristoph Hellwig __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1); 133327fa9bc5SChristoph Hellwig union nvme_result result; 1334f874d5d0SJames Smart bool complete_rq, terminate_assoc = true; 1335e399441dSJames Smart 1336e399441dSJames Smart /* 1337e399441dSJames Smart * WARNING: 1338e399441dSJames Smart * The current linux implementation of a nvme controller 1339e399441dSJames Smart * allocates a single tag set for all io queues and sizes 1340e399441dSJames Smart * the io queues to fully hold all possible tags. Thus, the 1341e399441dSJames Smart * implementation does not reference or care about the sqhd 1342e399441dSJames Smart * value as it never needs to use the sqhd/sqtail pointers 1343e399441dSJames Smart * for submission pacing. 1344e399441dSJames Smart * 1345e399441dSJames Smart * This affects the FC-NVME implementation in two ways: 1346e399441dSJames Smart * 1) As the value doesn't matter, we don't need to waste 1347e399441dSJames Smart * cycles extracting it from ERSPs and stamping it in the 1348e399441dSJames Smart * cases where the transport fabricates CQEs on successful 1349e399441dSJames Smart * completions. 1350e399441dSJames Smart * 2) The FC-NVME implementation requires that delivery of 1351e399441dSJames Smart * ERSP completions are to go back to the nvme layer in order 1352e399441dSJames Smart * relative to the rsn, such that the sqhd value will always 1353e399441dSJames Smart * be "in order" for the nvme layer. As the nvme layer in 1354e399441dSJames Smart * linux doesn't care about sqhd, there's no need to return 1355e399441dSJames Smart * them in order. 1356e399441dSJames Smart * 1357e399441dSJames Smart * Additionally: 1358e399441dSJames Smart * As the core nvme layer in linux currently does not look at 1359e399441dSJames Smart * every field in the cqe - in cases where the FC transport must 1360e399441dSJames Smart * fabricate a CQE, the following fields will not be set as they 1361e399441dSJames Smart * are not referenced: 1362e399441dSJames Smart * cqe.sqid, cqe.sqhd, cqe.command_id 1363f874d5d0SJames Smart * 1364f874d5d0SJames Smart * Failure or error of an individual i/o, in a transport 1365f874d5d0SJames Smart * detected fashion unrelated to the nvme completion status, 1366f874d5d0SJames Smart * potentially cause the initiator and target sides to get out 1367f874d5d0SJames Smart * of sync on SQ head/tail (aka outstanding io count allowed). 1368f874d5d0SJames Smart * Per FC-NVME spec, failure of an individual command requires 1369f874d5d0SJames Smart * the connection to be terminated, which in turn requires the 1370f874d5d0SJames Smart * association to be terminated. 1371e399441dSJames Smart */ 1372e399441dSJames Smart 1373e399441dSJames Smart fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, 1374e399441dSJames Smart sizeof(op->rsp_iu), DMA_FROM_DEVICE); 1375e399441dSJames Smart 1376e399441dSJames Smart if (atomic_read(&op->state) == FCPOP_STATE_ABORTED) 1377d663b69fSChristoph Hellwig status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1); 137862eeacb0SJames Smart else if (freq->status) 137956b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1380e399441dSJames Smart 1381e399441dSJames Smart /* 1382e399441dSJames Smart * For the linux implementation, if we have an unsuccesful 1383e399441dSJames Smart * status, they blk-mq layer can typically be called with the 1384e399441dSJames Smart * non-zero status and the content of the cqe isn't important. 1385e399441dSJames Smart */ 1386e399441dSJames Smart if (status) 1387e399441dSJames Smart goto done; 1388e399441dSJames Smart 1389e399441dSJames Smart /* 1390e399441dSJames Smart * command completed successfully relative to the wire 1391e399441dSJames Smart * protocol. However, validate anything received and 1392e399441dSJames Smart * extract the status and result from the cqe (create it 1393e399441dSJames Smart * where necessary). 1394e399441dSJames Smart */ 1395e399441dSJames Smart 1396e399441dSJames Smart switch (freq->rcv_rsplen) { 1397e399441dSJames Smart 1398e399441dSJames Smart case 0: 1399e399441dSJames Smart case NVME_FC_SIZEOF_ZEROS_RSP: 1400e399441dSJames Smart /* 1401e399441dSJames Smart * No response payload or 12 bytes of payload (which 1402e399441dSJames Smart * should all be zeros) are considered successful and 1403e399441dSJames Smart * no payload in the CQE by the transport. 1404e399441dSJames Smart */ 1405e399441dSJames Smart if (freq->transferred_length != 1406e399441dSJames Smart be32_to_cpu(op->cmd_iu.data_len)) { 140756b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1408e399441dSJames Smart goto done; 1409e399441dSJames Smart } 141027fa9bc5SChristoph Hellwig result.u64 = 0; 1411e399441dSJames Smart break; 1412e399441dSJames Smart 1413e399441dSJames Smart case sizeof(struct nvme_fc_ersp_iu): 1414e399441dSJames Smart /* 1415e399441dSJames Smart * The ERSP IU contains a full completion with CQE. 1416e399441dSJames Smart * Validate ERSP IU and look at cqe. 1417e399441dSJames Smart */ 1418e399441dSJames Smart if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != 1419e399441dSJames Smart (freq->rcv_rsplen / 4) || 1420e399441dSJames Smart be32_to_cpu(op->rsp_iu.xfrd_len) != 1421e399441dSJames Smart freq->transferred_length || 1422726a1080SJames Smart op->rsp_iu.status_code || 1423458f280dSJames Smart sqe->common.command_id != cqe->command_id)) { 142456b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1425e399441dSJames Smart goto done; 1426e399441dSJames Smart } 142727fa9bc5SChristoph Hellwig result = cqe->result; 1428d663b69fSChristoph Hellwig status = cqe->status; 1429e399441dSJames Smart break; 1430e399441dSJames Smart 1431e399441dSJames Smart default: 143256b7103aSJames Smart status = cpu_to_le16(NVME_SC_INTERNAL << 1); 1433e399441dSJames Smart goto done; 1434e399441dSJames Smart } 1435e399441dSJames Smart 1436f874d5d0SJames Smart terminate_assoc = false; 1437f874d5d0SJames Smart 1438e399441dSJames Smart done: 143978a7ac26SJames Smart if (op->flags & FCOP_FLAGS_AEN) { 144027fa9bc5SChristoph Hellwig nvme_complete_async_event(&queue->ctrl->ctrl, status, &result); 144178a7ac26SJames Smart complete_rq = __nvme_fc_fcpop_chk_teardowns(ctrl, op); 144278a7ac26SJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 144378a7ac26SJames Smart op->flags = FCOP_FLAGS_AEN; /* clear other flags */ 1444e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 1445f874d5d0SJames Smart goto check_error; 1446e399441dSJames Smart } 1447e399441dSJames Smart 144878a7ac26SJames Smart complete_rq = __nvme_fc_fcpop_chk_teardowns(ctrl, op); 144978a7ac26SJames Smart if (!complete_rq) { 145078a7ac26SJames Smart if (unlikely(op->flags & FCOP_FLAGS_TERMIO)) { 1451e392e1f1SJames Smart status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); 145278a7ac26SJames Smart if (blk_queue_dying(rq->q)) 1453e392e1f1SJames Smart status |= cpu_to_le16(NVME_SC_DNR << 1); 145478a7ac26SJames Smart } 145527fa9bc5SChristoph Hellwig nvme_end_request(rq, status, result); 145678a7ac26SJames Smart } else 145778a7ac26SJames Smart __nvme_fc_final_op_cleanup(rq); 1458f874d5d0SJames Smart 1459f874d5d0SJames Smart check_error: 1460f874d5d0SJames Smart if (terminate_assoc) 1461f874d5d0SJames Smart nvme_fc_error_recovery(ctrl, "transport detected io error"); 1462e399441dSJames Smart } 1463e399441dSJames Smart 1464e399441dSJames Smart static int 1465e399441dSJames Smart __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, 1466e399441dSJames Smart struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, 1467e399441dSJames Smart struct request *rq, u32 rqno) 1468e399441dSJames Smart { 1469e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 1470e399441dSJames Smart int ret = 0; 1471e399441dSJames Smart 1472e399441dSJames Smart memset(op, 0, sizeof(*op)); 1473e399441dSJames Smart op->fcp_req.cmdaddr = &op->cmd_iu; 1474e399441dSJames Smart op->fcp_req.cmdlen = sizeof(op->cmd_iu); 1475e399441dSJames Smart op->fcp_req.rspaddr = &op->rsp_iu; 1476e399441dSJames Smart op->fcp_req.rsplen = sizeof(op->rsp_iu); 1477e399441dSJames Smart op->fcp_req.done = nvme_fc_fcpio_done; 1478e399441dSJames Smart op->fcp_req.first_sgl = (struct scatterlist *)&op[1]; 1479e399441dSJames Smart op->fcp_req.private = &op->fcp_req.first_sgl[SG_CHUNK_SIZE]; 1480e399441dSJames Smart op->ctrl = ctrl; 1481e399441dSJames Smart op->queue = queue; 1482e399441dSJames Smart op->rq = rq; 1483e399441dSJames Smart op->rqno = rqno; 1484e399441dSJames Smart 1485e399441dSJames Smart cmdiu->scsi_id = NVME_CMD_SCSI_ID; 1486e399441dSJames Smart cmdiu->fc_id = NVME_CMD_FC_ID; 1487e399441dSJames Smart cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); 1488e399441dSJames Smart 1489e399441dSJames Smart op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, 1490e399441dSJames Smart &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); 1491e399441dSJames Smart if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { 1492e399441dSJames Smart dev_err(ctrl->dev, 1493e399441dSJames Smart "FCP Op failed - cmdiu dma mapping failed.\n"); 1494e399441dSJames Smart ret = EFAULT; 1495e399441dSJames Smart goto out_on_error; 1496e399441dSJames Smart } 1497e399441dSJames Smart 1498e399441dSJames Smart op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, 1499e399441dSJames Smart &op->rsp_iu, sizeof(op->rsp_iu), 1500e399441dSJames Smart DMA_FROM_DEVICE); 1501e399441dSJames Smart if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { 1502e399441dSJames Smart dev_err(ctrl->dev, 1503e399441dSJames Smart "FCP Op failed - rspiu dma mapping failed.\n"); 1504e399441dSJames Smart ret = EFAULT; 1505e399441dSJames Smart } 1506e399441dSJames Smart 1507e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 1508e399441dSJames Smart out_on_error: 1509e399441dSJames Smart return ret; 1510e399441dSJames Smart } 1511e399441dSJames Smart 1512e399441dSJames Smart static int 1513d6296d39SChristoph Hellwig nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, 1514d6296d39SChristoph Hellwig unsigned int hctx_idx, unsigned int numa_node) 1515e399441dSJames Smart { 1516d6296d39SChristoph Hellwig struct nvme_fc_ctrl *ctrl = set->driver_data; 1517e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 151876f983cbSChristoph Hellwig int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; 151976f983cbSChristoph Hellwig struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; 1520e399441dSJames Smart 1521e399441dSJames Smart return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++); 1522e399441dSJames Smart } 1523e399441dSJames Smart 1524e399441dSJames Smart static int 1525e399441dSJames Smart nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) 1526e399441dSJames Smart { 1527e399441dSJames Smart struct nvme_fc_fcp_op *aen_op; 1528e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu; 1529e399441dSJames Smart struct nvme_command *sqe; 153061bff8efSJames Smart void *private; 1531e399441dSJames Smart int i, ret; 1532e399441dSJames Smart 1533e399441dSJames Smart aen_op = ctrl->aen_ops; 1534e399441dSJames Smart for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { 153561bff8efSJames Smart private = kzalloc(ctrl->lport->ops->fcprqst_priv_sz, 153661bff8efSJames Smart GFP_KERNEL); 153761bff8efSJames Smart if (!private) 153861bff8efSJames Smart return -ENOMEM; 153961bff8efSJames Smart 1540e399441dSJames Smart cmdiu = &aen_op->cmd_iu; 1541e399441dSJames Smart sqe = &cmdiu->sqe; 1542e399441dSJames Smart ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], 1543e399441dSJames Smart aen_op, (struct request *)NULL, 1544e399441dSJames Smart (AEN_CMDID_BASE + i)); 154561bff8efSJames Smart if (ret) { 154661bff8efSJames Smart kfree(private); 1547e399441dSJames Smart return ret; 154861bff8efSJames Smart } 1549e399441dSJames Smart 155078a7ac26SJames Smart aen_op->flags = FCOP_FLAGS_AEN; 155161bff8efSJames Smart aen_op->fcp_req.first_sgl = NULL; /* no sg list */ 155261bff8efSJames Smart aen_op->fcp_req.private = private; 155378a7ac26SJames Smart 1554e399441dSJames Smart memset(sqe, 0, sizeof(*sqe)); 1555e399441dSJames Smart sqe->common.opcode = nvme_admin_async_event; 155678a7ac26SJames Smart /* Note: core layer may overwrite the sqe.command_id value */ 1557e399441dSJames Smart sqe->common.command_id = AEN_CMDID_BASE + i; 1558e399441dSJames Smart } 1559e399441dSJames Smart return 0; 1560e399441dSJames Smart } 1561e399441dSJames Smart 156261bff8efSJames Smart static void 156361bff8efSJames Smart nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl) 156461bff8efSJames Smart { 156561bff8efSJames Smart struct nvme_fc_fcp_op *aen_op; 156661bff8efSJames Smart int i; 156761bff8efSJames Smart 156861bff8efSJames Smart aen_op = ctrl->aen_ops; 156961bff8efSJames Smart for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { 157061bff8efSJames Smart if (!aen_op->fcp_req.private) 157161bff8efSJames Smart continue; 157261bff8efSJames Smart 157361bff8efSJames Smart __nvme_fc_exit_request(ctrl, aen_op); 157461bff8efSJames Smart 157561bff8efSJames Smart kfree(aen_op->fcp_req.private); 157661bff8efSJames Smart aen_op->fcp_req.private = NULL; 157761bff8efSJames Smart } 157861bff8efSJames Smart } 1579e399441dSJames Smart 1580e399441dSJames Smart static inline void 1581e399441dSJames Smart __nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, 1582e399441dSJames Smart unsigned int qidx) 1583e399441dSJames Smart { 1584e399441dSJames Smart struct nvme_fc_queue *queue = &ctrl->queues[qidx]; 1585e399441dSJames Smart 1586e399441dSJames Smart hctx->driver_data = queue; 1587e399441dSJames Smart queue->hctx = hctx; 1588e399441dSJames Smart } 1589e399441dSJames Smart 1590e399441dSJames Smart static int 1591e399441dSJames Smart nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 1592e399441dSJames Smart unsigned int hctx_idx) 1593e399441dSJames Smart { 1594e399441dSJames Smart struct nvme_fc_ctrl *ctrl = data; 1595e399441dSJames Smart 1596e399441dSJames Smart __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); 1597e399441dSJames Smart 1598e399441dSJames Smart return 0; 1599e399441dSJames Smart } 1600e399441dSJames Smart 1601e399441dSJames Smart static int 1602e399441dSJames Smart nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, 1603e399441dSJames Smart unsigned int hctx_idx) 1604e399441dSJames Smart { 1605e399441dSJames Smart struct nvme_fc_ctrl *ctrl = data; 1606e399441dSJames Smart 1607e399441dSJames Smart __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); 1608e399441dSJames Smart 1609e399441dSJames Smart return 0; 1610e399441dSJames Smart } 1611e399441dSJames Smart 1612e399441dSJames Smart static void 1613e399441dSJames Smart nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx, size_t queue_size) 1614e399441dSJames Smart { 1615e399441dSJames Smart struct nvme_fc_queue *queue; 1616e399441dSJames Smart 1617e399441dSJames Smart queue = &ctrl->queues[idx]; 1618e399441dSJames Smart memset(queue, 0, sizeof(*queue)); 1619e399441dSJames Smart queue->ctrl = ctrl; 1620e399441dSJames Smart queue->qnum = idx; 1621e399441dSJames Smart atomic_set(&queue->csn, 1); 1622e399441dSJames Smart queue->dev = ctrl->dev; 1623e399441dSJames Smart 1624e399441dSJames Smart if (idx > 0) 1625e399441dSJames Smart queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; 1626e399441dSJames Smart else 1627e399441dSJames Smart queue->cmnd_capsule_len = sizeof(struct nvme_command); 1628e399441dSJames Smart 1629e399441dSJames Smart queue->queue_size = queue_size; 1630e399441dSJames Smart 1631e399441dSJames Smart /* 1632e399441dSJames Smart * Considered whether we should allocate buffers for all SQEs 1633e399441dSJames Smart * and CQEs and dma map them - mapping their respective entries 1634e399441dSJames Smart * into the request structures (kernel vm addr and dma address) 1635e399441dSJames Smart * thus the driver could use the buffers/mappings directly. 1636e399441dSJames Smart * It only makes sense if the LLDD would use them for its 1637e399441dSJames Smart * messaging api. It's very unlikely most adapter api's would use 1638e399441dSJames Smart * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload 1639e399441dSJames Smart * structures were used instead. 1640e399441dSJames Smart */ 1641e399441dSJames Smart } 1642e399441dSJames Smart 1643e399441dSJames Smart /* 1644e399441dSJames Smart * This routine terminates a queue at the transport level. 1645e399441dSJames Smart * The transport has already ensured that all outstanding ios on 1646e399441dSJames Smart * the queue have been terminated. 1647e399441dSJames Smart * The transport will send a Disconnect LS request to terminate 1648e399441dSJames Smart * the queue's connection. Termination of the admin queue will also 1649e399441dSJames Smart * terminate the association at the target. 1650e399441dSJames Smart */ 1651e399441dSJames Smart static void 1652e399441dSJames Smart nvme_fc_free_queue(struct nvme_fc_queue *queue) 1653e399441dSJames Smart { 1654e399441dSJames Smart if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) 1655e399441dSJames Smart return; 1656e399441dSJames Smart 1657e399441dSJames Smart /* 1658e399441dSJames Smart * Current implementation never disconnects a single queue. 1659e399441dSJames Smart * It always terminates a whole association. So there is never 1660e399441dSJames Smart * a disconnect(queue) LS sent to the target. 1661e399441dSJames Smart */ 1662e399441dSJames Smart 1663e399441dSJames Smart queue->connection_id = 0; 1664e399441dSJames Smart clear_bit(NVME_FC_Q_CONNECTED, &queue->flags); 1665e399441dSJames Smart } 1666e399441dSJames Smart 1667e399441dSJames Smart static void 1668e399441dSJames Smart __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, 1669e399441dSJames Smart struct nvme_fc_queue *queue, unsigned int qidx) 1670e399441dSJames Smart { 1671e399441dSJames Smart if (ctrl->lport->ops->delete_queue) 1672e399441dSJames Smart ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, 1673e399441dSJames Smart queue->lldd_handle); 1674e399441dSJames Smart queue->lldd_handle = NULL; 1675e399441dSJames Smart } 1676e399441dSJames Smart 1677e399441dSJames Smart static void 1678e399441dSJames Smart nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) 1679e399441dSJames Smart { 1680e399441dSJames Smart int i; 1681e399441dSJames Smart 1682d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) 1683e399441dSJames Smart nvme_fc_free_queue(&ctrl->queues[i]); 1684e399441dSJames Smart } 1685e399441dSJames Smart 1686e399441dSJames Smart static int 1687e399441dSJames Smart __nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, 1688e399441dSJames Smart struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) 1689e399441dSJames Smart { 1690e399441dSJames Smart int ret = 0; 1691e399441dSJames Smart 1692e399441dSJames Smart queue->lldd_handle = NULL; 1693e399441dSJames Smart if (ctrl->lport->ops->create_queue) 1694e399441dSJames Smart ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, 1695e399441dSJames Smart qidx, qsize, &queue->lldd_handle); 1696e399441dSJames Smart 1697e399441dSJames Smart return ret; 1698e399441dSJames Smart } 1699e399441dSJames Smart 1700e399441dSJames Smart static void 1701e399441dSJames Smart nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) 1702e399441dSJames Smart { 1703d858e5f0SSagi Grimberg struct nvme_fc_queue *queue = &ctrl->queues[ctrl->ctrl.queue_count - 1]; 1704e399441dSJames Smart int i; 1705e399441dSJames Smart 1706d858e5f0SSagi Grimberg for (i = ctrl->ctrl.queue_count - 1; i >= 1; i--, queue--) 1707e399441dSJames Smart __nvme_fc_delete_hw_queue(ctrl, queue, i); 1708e399441dSJames Smart } 1709e399441dSJames Smart 1710e399441dSJames Smart static int 1711e399441dSJames Smart nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) 1712e399441dSJames Smart { 1713e399441dSJames Smart struct nvme_fc_queue *queue = &ctrl->queues[1]; 171417a1ec08SJohannes Thumshirn int i, ret; 1715e399441dSJames Smart 1716d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++, queue++) { 1717e399441dSJames Smart ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); 171817a1ec08SJohannes Thumshirn if (ret) 171917a1ec08SJohannes Thumshirn goto delete_queues; 1720e399441dSJames Smart } 1721e399441dSJames Smart 1722e399441dSJames Smart return 0; 172317a1ec08SJohannes Thumshirn 172417a1ec08SJohannes Thumshirn delete_queues: 172517a1ec08SJohannes Thumshirn for (; i >= 0; i--) 172617a1ec08SJohannes Thumshirn __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[i], i); 172717a1ec08SJohannes Thumshirn return ret; 1728e399441dSJames Smart } 1729e399441dSJames Smart 1730e399441dSJames Smart static int 1731e399441dSJames Smart nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) 1732e399441dSJames Smart { 1733e399441dSJames Smart int i, ret = 0; 1734e399441dSJames Smart 1735d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) { 1736e399441dSJames Smart ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, 1737e399441dSJames Smart (qsize / 5)); 1738e399441dSJames Smart if (ret) 1739e399441dSJames Smart break; 1740e399441dSJames Smart ret = nvmf_connect_io_queue(&ctrl->ctrl, i); 1741e399441dSJames Smart if (ret) 1742e399441dSJames Smart break; 1743e399441dSJames Smart } 1744e399441dSJames Smart 1745e399441dSJames Smart return ret; 1746e399441dSJames Smart } 1747e399441dSJames Smart 1748e399441dSJames Smart static void 1749e399441dSJames Smart nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) 1750e399441dSJames Smart { 1751e399441dSJames Smart int i; 1752e399441dSJames Smart 1753d858e5f0SSagi Grimberg for (i = 1; i < ctrl->ctrl.queue_count; i++) 1754e399441dSJames Smart nvme_fc_init_queue(ctrl, i, ctrl->ctrl.sqsize); 1755e399441dSJames Smart } 1756e399441dSJames Smart 1757e399441dSJames Smart static void 1758e399441dSJames Smart nvme_fc_ctrl_free(struct kref *ref) 1759e399441dSJames Smart { 1760e399441dSJames Smart struct nvme_fc_ctrl *ctrl = 1761e399441dSJames Smart container_of(ref, struct nvme_fc_ctrl, ref); 1762e399441dSJames Smart unsigned long flags; 1763e399441dSJames Smart 176461bff8efSJames Smart if (ctrl->ctrl.tagset) { 176561bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.connect_q); 176661bff8efSJames Smart blk_mq_free_tag_set(&ctrl->tag_set); 176761bff8efSJames Smart } 176861bff8efSJames Smart 1769e399441dSJames Smart /* remove from rport list */ 1770e399441dSJames Smart spin_lock_irqsave(&ctrl->rport->lock, flags); 1771e399441dSJames Smart list_del(&ctrl->ctrl_list); 1772e399441dSJames Smart spin_unlock_irqrestore(&ctrl->rport->lock, flags); 177361bff8efSJames Smart 1774f9c5af5fSSagi Grimberg blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 177561bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.admin_q); 177661bff8efSJames Smart blk_mq_free_tag_set(&ctrl->admin_tag_set); 177761bff8efSJames Smart 177861bff8efSJames Smart kfree(ctrl->queues); 1779e399441dSJames Smart 1780e399441dSJames Smart put_device(ctrl->dev); 1781e399441dSJames Smart nvme_fc_rport_put(ctrl->rport); 1782e399441dSJames Smart 1783e399441dSJames Smart ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); 1784de41447aSEwan D. Milne if (ctrl->ctrl.opts) 1785e399441dSJames Smart nvmf_free_options(ctrl->ctrl.opts); 1786e399441dSJames Smart kfree(ctrl); 1787e399441dSJames Smart } 1788e399441dSJames Smart 1789e399441dSJames Smart static void 1790e399441dSJames Smart nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) 1791e399441dSJames Smart { 1792e399441dSJames Smart kref_put(&ctrl->ref, nvme_fc_ctrl_free); 1793e399441dSJames Smart } 1794e399441dSJames Smart 1795e399441dSJames Smart static int 1796e399441dSJames Smart nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) 1797e399441dSJames Smart { 1798e399441dSJames Smart return kref_get_unless_zero(&ctrl->ref); 1799e399441dSJames Smart } 1800e399441dSJames Smart 1801e399441dSJames Smart /* 1802e399441dSJames Smart * All accesses from nvme core layer done - can now free the 1803e399441dSJames Smart * controller. Called after last nvme_put_ctrl() call 1804e399441dSJames Smart */ 1805e399441dSJames Smart static void 180661bff8efSJames Smart nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl) 1807e399441dSJames Smart { 1808e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 1809e399441dSJames Smart 1810e399441dSJames Smart WARN_ON(nctrl != &ctrl->ctrl); 1811e399441dSJames Smart 1812e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 1813e399441dSJames Smart } 1814e399441dSJames Smart 181561bff8efSJames Smart static void 181661bff8efSJames Smart nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) 181761bff8efSJames Smart { 181869fa9646SJames Smart /* only proceed if in LIVE state - e.g. on first error */ 181969fa9646SJames Smart if (ctrl->ctrl.state != NVME_CTRL_LIVE) 182069fa9646SJames Smart return; 182169fa9646SJames Smart 182261bff8efSJames Smart dev_warn(ctrl->ctrl.device, 182361bff8efSJames Smart "NVME-FC{%d}: transport association error detected: %s\n", 182461bff8efSJames Smart ctrl->cnum, errmsg); 1825589ff775SJames Smart dev_warn(ctrl->ctrl.device, 182661bff8efSJames Smart "NVME-FC{%d}: resetting controller\n", ctrl->cnum); 182761bff8efSJames Smart 182861bff8efSJames Smart if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RECONNECTING)) { 182961bff8efSJames Smart dev_err(ctrl->ctrl.device, 183061bff8efSJames Smart "NVME-FC{%d}: error_recovery: Couldn't change state " 183161bff8efSJames Smart "to RECONNECTING\n", ctrl->cnum); 183261bff8efSJames Smart return; 183361bff8efSJames Smart } 183461bff8efSJames Smart 1835d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&ctrl->ctrl); 183661bff8efSJames Smart } 183761bff8efSJames Smart 1838baee29acSChristoph Hellwig static enum blk_eh_timer_return 1839e399441dSJames Smart nvme_fc_timeout(struct request *rq, bool reserved) 1840e399441dSJames Smart { 1841e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 1842e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 1843e399441dSJames Smart int ret; 1844e399441dSJames Smart 1845e399441dSJames Smart if (reserved) 1846e399441dSJames Smart return BLK_EH_RESET_TIMER; 1847e399441dSJames Smart 1848e399441dSJames Smart ret = __nvme_fc_abort_op(ctrl, op); 1849e399441dSJames Smart if (ret) 1850e399441dSJames Smart /* io wasn't active to abort consider it done */ 1851e399441dSJames Smart return BLK_EH_HANDLED; 1852e399441dSJames Smart 1853e399441dSJames Smart /* 185461bff8efSJames Smart * we can't individually ABTS an io without affecting the queue, 185561bff8efSJames Smart * thus killing the queue, adn thus the association. 185661bff8efSJames Smart * So resolve by performing a controller reset, which will stop 185761bff8efSJames Smart * the host/io stack, terminate the association on the link, 185861bff8efSJames Smart * and recreate an association on the link. 1859e399441dSJames Smart */ 186061bff8efSJames Smart nvme_fc_error_recovery(ctrl, "io timeout error"); 1861e399441dSJames Smart 1862e399441dSJames Smart return BLK_EH_HANDLED; 1863e399441dSJames Smart } 1864e399441dSJames Smart 1865e399441dSJames Smart static int 1866e399441dSJames Smart nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, 1867e399441dSJames Smart struct nvme_fc_fcp_op *op) 1868e399441dSJames Smart { 1869e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 1870e399441dSJames Smart enum dma_data_direction dir; 1871e399441dSJames Smart int ret; 1872e399441dSJames Smart 1873e399441dSJames Smart freq->sg_cnt = 0; 1874e399441dSJames Smart 1875b131c61dSChristoph Hellwig if (!blk_rq_payload_bytes(rq)) 1876e399441dSJames Smart return 0; 1877e399441dSJames Smart 1878e399441dSJames Smart freq->sg_table.sgl = freq->first_sgl; 187919e420bbSChristoph Hellwig ret = sg_alloc_table_chained(&freq->sg_table, 188019e420bbSChristoph Hellwig blk_rq_nr_phys_segments(rq), freq->sg_table.sgl); 1881e399441dSJames Smart if (ret) 1882e399441dSJames Smart return -ENOMEM; 1883e399441dSJames Smart 1884e399441dSJames Smart op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); 188519e420bbSChristoph Hellwig WARN_ON(op->nents > blk_rq_nr_phys_segments(rq)); 1886e399441dSJames Smart dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 1887e399441dSJames Smart freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, 1888e399441dSJames Smart op->nents, dir); 1889e399441dSJames Smart if (unlikely(freq->sg_cnt <= 0)) { 1890e399441dSJames Smart sg_free_table_chained(&freq->sg_table, true); 1891e399441dSJames Smart freq->sg_cnt = 0; 1892e399441dSJames Smart return -EFAULT; 1893e399441dSJames Smart } 1894e399441dSJames Smart 1895e399441dSJames Smart /* 1896e399441dSJames Smart * TODO: blk_integrity_rq(rq) for DIF 1897e399441dSJames Smart */ 1898e399441dSJames Smart return 0; 1899e399441dSJames Smart } 1900e399441dSJames Smart 1901e399441dSJames Smart static void 1902e399441dSJames Smart nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, 1903e399441dSJames Smart struct nvme_fc_fcp_op *op) 1904e399441dSJames Smart { 1905e399441dSJames Smart struct nvmefc_fcp_req *freq = &op->fcp_req; 1906e399441dSJames Smart 1907e399441dSJames Smart if (!freq->sg_cnt) 1908e399441dSJames Smart return; 1909e399441dSJames Smart 1910e399441dSJames Smart fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, 1911e399441dSJames Smart ((rq_data_dir(rq) == WRITE) ? 1912e399441dSJames Smart DMA_TO_DEVICE : DMA_FROM_DEVICE)); 1913e399441dSJames Smart 1914e399441dSJames Smart nvme_cleanup_cmd(rq); 1915e399441dSJames Smart 1916e399441dSJames Smart sg_free_table_chained(&freq->sg_table, true); 1917e399441dSJames Smart 1918e399441dSJames Smart freq->sg_cnt = 0; 1919e399441dSJames Smart } 1920e399441dSJames Smart 1921e399441dSJames Smart /* 1922e399441dSJames Smart * In FC, the queue is a logical thing. At transport connect, the target 1923e399441dSJames Smart * creates its "queue" and returns a handle that is to be given to the 1924e399441dSJames Smart * target whenever it posts something to the corresponding SQ. When an 1925e399441dSJames Smart * SQE is sent on a SQ, FC effectively considers the SQE, or rather the 1926e399441dSJames Smart * command contained within the SQE, an io, and assigns a FC exchange 1927e399441dSJames Smart * to it. The SQE and the associated SQ handle are sent in the initial 1928e399441dSJames Smart * CMD IU sents on the exchange. All transfers relative to the io occur 1929e399441dSJames Smart * as part of the exchange. The CQE is the last thing for the io, 1930e399441dSJames Smart * which is transferred (explicitly or implicitly) with the RSP IU 1931e399441dSJames Smart * sent on the exchange. After the CQE is received, the FC exchange is 1932e399441dSJames Smart * terminaed and the Exchange may be used on a different io. 1933e399441dSJames Smart * 1934e399441dSJames Smart * The transport to LLDD api has the transport making a request for a 1935e399441dSJames Smart * new fcp io request to the LLDD. The LLDD then allocates a FC exchange 1936e399441dSJames Smart * resource and transfers the command. The LLDD will then process all 1937e399441dSJames Smart * steps to complete the io. Upon completion, the transport done routine 1938e399441dSJames Smart * is called. 1939e399441dSJames Smart * 1940e399441dSJames Smart * So - while the operation is outstanding to the LLDD, there is a link 1941e399441dSJames Smart * level FC exchange resource that is also outstanding. This must be 1942e399441dSJames Smart * considered in all cleanup operations. 1943e399441dSJames Smart */ 1944fc17b653SChristoph Hellwig static blk_status_t 1945e399441dSJames Smart nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, 1946e399441dSJames Smart struct nvme_fc_fcp_op *op, u32 data_len, 1947e399441dSJames Smart enum nvmefc_fcp_datadir io_dir) 1948e399441dSJames Smart { 1949e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 1950e399441dSJames Smart struct nvme_command *sqe = &cmdiu->sqe; 1951e399441dSJames Smart u32 csn; 1952e399441dSJames Smart int ret; 1953e399441dSJames Smart 195461bff8efSJames Smart /* 195561bff8efSJames Smart * before attempting to send the io, check to see if we believe 195661bff8efSJames Smart * the target device is present 195761bff8efSJames Smart */ 195861bff8efSJames Smart if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE) 19598b25f351SJames Smart goto busy; 196061bff8efSJames Smart 1961e399441dSJames Smart if (!nvme_fc_ctrl_get(ctrl)) 1962fc17b653SChristoph Hellwig return BLK_STS_IOERR; 1963e399441dSJames Smart 1964e399441dSJames Smart /* format the FC-NVME CMD IU and fcp_req */ 1965e399441dSJames Smart cmdiu->connection_id = cpu_to_be64(queue->connection_id); 1966e399441dSJames Smart csn = atomic_inc_return(&queue->csn); 1967e399441dSJames Smart cmdiu->csn = cpu_to_be32(csn); 1968e399441dSJames Smart cmdiu->data_len = cpu_to_be32(data_len); 1969e399441dSJames Smart switch (io_dir) { 1970e399441dSJames Smart case NVMEFC_FCP_WRITE: 1971e399441dSJames Smart cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; 1972e399441dSJames Smart break; 1973e399441dSJames Smart case NVMEFC_FCP_READ: 1974e399441dSJames Smart cmdiu->flags = FCNVME_CMD_FLAGS_READ; 1975e399441dSJames Smart break; 1976e399441dSJames Smart case NVMEFC_FCP_NODATA: 1977e399441dSJames Smart cmdiu->flags = 0; 1978e399441dSJames Smart break; 1979e399441dSJames Smart } 1980e399441dSJames Smart op->fcp_req.payload_length = data_len; 1981e399441dSJames Smart op->fcp_req.io_dir = io_dir; 1982e399441dSJames Smart op->fcp_req.transferred_length = 0; 1983e399441dSJames Smart op->fcp_req.rcv_rsplen = 0; 198462eeacb0SJames Smart op->fcp_req.status = NVME_SC_SUCCESS; 1985e399441dSJames Smart op->fcp_req.sqid = cpu_to_le16(queue->qnum); 1986e399441dSJames Smart 1987e399441dSJames Smart /* 1988e399441dSJames Smart * validate per fabric rules, set fields mandated by fabric spec 1989e399441dSJames Smart * as well as those by FC-NVME spec. 1990e399441dSJames Smart */ 1991e399441dSJames Smart WARN_ON_ONCE(sqe->common.metadata); 1992e399441dSJames Smart sqe->common.flags |= NVME_CMD_SGL_METABUF; 1993e399441dSJames Smart 1994e399441dSJames Smart /* 1995d9d34c0bSJames Smart * format SQE DPTR field per FC-NVME rules: 1996d9d34c0bSJames Smart * type=0x5 Transport SGL Data Block Descriptor 1997d9d34c0bSJames Smart * subtype=0xA Transport-specific value 1998d9d34c0bSJames Smart * address=0 1999d9d34c0bSJames Smart * length=length of the data series 2000e399441dSJames Smart */ 2001d9d34c0bSJames Smart sqe->rw.dptr.sgl.type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 2002d9d34c0bSJames Smart NVME_SGL_FMT_TRANSPORT_A; 2003e399441dSJames Smart sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); 2004e399441dSJames Smart sqe->rw.dptr.sgl.addr = 0; 2005e399441dSJames Smart 200678a7ac26SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) { 2007e399441dSJames Smart ret = nvme_fc_map_data(ctrl, op->rq, op); 2008e399441dSJames Smart if (ret < 0) { 2009e399441dSJames Smart nvme_cleanup_cmd(op->rq); 2010e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2011fc17b653SChristoph Hellwig if (ret == -ENOMEM || ret == -EAGAIN) 2012fc17b653SChristoph Hellwig return BLK_STS_RESOURCE; 2013fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2014e399441dSJames Smart } 2015e399441dSJames Smart } 2016e399441dSJames Smart 2017e399441dSJames Smart fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, 2018e399441dSJames Smart sizeof(op->cmd_iu), DMA_TO_DEVICE); 2019e399441dSJames Smart 2020e399441dSJames Smart atomic_set(&op->state, FCPOP_STATE_ACTIVE); 2021e399441dSJames Smart 202278a7ac26SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) 2023e399441dSJames Smart blk_mq_start_request(op->rq); 2024e399441dSJames Smart 2025e399441dSJames Smart ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, 2026e399441dSJames Smart &ctrl->rport->remoteport, 2027e399441dSJames Smart queue->lldd_handle, &op->fcp_req); 2028e399441dSJames Smart 2029e399441dSJames Smart if (ret) { 20308b25f351SJames Smart if (!(op->flags & FCOP_FLAGS_AEN)) 2031e399441dSJames Smart nvme_fc_unmap_data(ctrl, op->rq, op); 2032e399441dSJames Smart 2033e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2034e399441dSJames Smart 20358b25f351SJames Smart if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE && 20368b25f351SJames Smart ret != -EBUSY) 2037fc17b653SChristoph Hellwig return BLK_STS_IOERR; 2038e399441dSJames Smart 20398b25f351SJames Smart goto busy; 2040e399441dSJames Smart } 2041e399441dSJames Smart 2042fc17b653SChristoph Hellwig return BLK_STS_OK; 20438b25f351SJames Smart 20448b25f351SJames Smart busy: 20458b25f351SJames Smart if (!(op->flags & FCOP_FLAGS_AEN) && queue->hctx) 20468b25f351SJames Smart blk_mq_delay_run_hw_queue(queue->hctx, NVMEFC_QUEUE_DELAY); 20478b25f351SJames Smart 20488b25f351SJames Smart return BLK_STS_RESOURCE; 2049e399441dSJames Smart } 2050e399441dSJames Smart 2051fc17b653SChristoph Hellwig static blk_status_t 2052e399441dSJames Smart nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, 2053e399441dSJames Smart const struct blk_mq_queue_data *bd) 2054e399441dSJames Smart { 2055e399441dSJames Smart struct nvme_ns *ns = hctx->queue->queuedata; 2056e399441dSJames Smart struct nvme_fc_queue *queue = hctx->driver_data; 2057e399441dSJames Smart struct nvme_fc_ctrl *ctrl = queue->ctrl; 2058e399441dSJames Smart struct request *rq = bd->rq; 2059e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2060e399441dSJames Smart struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; 2061e399441dSJames Smart struct nvme_command *sqe = &cmdiu->sqe; 2062e399441dSJames Smart enum nvmefc_fcp_datadir io_dir; 2063e399441dSJames Smart u32 data_len; 2064fc17b653SChristoph Hellwig blk_status_t ret; 2065e399441dSJames Smart 2066e399441dSJames Smart ret = nvme_setup_cmd(ns, rq, sqe); 2067e399441dSJames Smart if (ret) 2068e399441dSJames Smart return ret; 2069e399441dSJames Smart 2070b131c61dSChristoph Hellwig data_len = blk_rq_payload_bytes(rq); 2071e399441dSJames Smart if (data_len) 2072e399441dSJames Smart io_dir = ((rq_data_dir(rq) == WRITE) ? 2073e399441dSJames Smart NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); 2074e399441dSJames Smart else 2075e399441dSJames Smart io_dir = NVMEFC_FCP_NODATA; 2076e399441dSJames Smart 2077e399441dSJames Smart return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); 2078e399441dSJames Smart } 2079e399441dSJames Smart 2080e399441dSJames Smart static struct blk_mq_tags * 2081e399441dSJames Smart nvme_fc_tagset(struct nvme_fc_queue *queue) 2082e399441dSJames Smart { 2083e399441dSJames Smart if (queue->qnum == 0) 2084e399441dSJames Smart return queue->ctrl->admin_tag_set.tags[queue->qnum]; 2085e399441dSJames Smart 2086e399441dSJames Smart return queue->ctrl->tag_set.tags[queue->qnum - 1]; 2087e399441dSJames Smart } 2088e399441dSJames Smart 2089e399441dSJames Smart static int 2090e399441dSJames Smart nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) 2091e399441dSJames Smart 2092e399441dSJames Smart { 2093e399441dSJames Smart struct nvme_fc_queue *queue = hctx->driver_data; 2094e399441dSJames Smart struct nvme_fc_ctrl *ctrl = queue->ctrl; 2095e399441dSJames Smart struct request *req; 2096e399441dSJames Smart struct nvme_fc_fcp_op *op; 2097e399441dSJames Smart 2098e399441dSJames Smart req = blk_mq_tag_to_rq(nvme_fc_tagset(queue), tag); 209961bff8efSJames Smart if (!req) 2100e399441dSJames Smart return 0; 2101e399441dSJames Smart 2102e399441dSJames Smart op = blk_mq_rq_to_pdu(req); 2103e399441dSJames Smart 2104e399441dSJames Smart if ((atomic_read(&op->state) == FCPOP_STATE_ACTIVE) && 2105e399441dSJames Smart (ctrl->lport->ops->poll_queue)) 2106e399441dSJames Smart ctrl->lport->ops->poll_queue(&ctrl->lport->localport, 2107e399441dSJames Smart queue->lldd_handle); 2108e399441dSJames Smart 2109e399441dSJames Smart return ((atomic_read(&op->state) != FCPOP_STATE_ACTIVE)); 2110e399441dSJames Smart } 2111e399441dSJames Smart 2112e399441dSJames Smart static void 2113e399441dSJames Smart nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx) 2114e399441dSJames Smart { 2115e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); 2116e399441dSJames Smart struct nvme_fc_fcp_op *aen_op; 211761bff8efSJames Smart unsigned long flags; 211861bff8efSJames Smart bool terminating = false; 2119fc17b653SChristoph Hellwig blk_status_t ret; 2120e399441dSJames Smart 2121e399441dSJames Smart if (aer_idx > NVME_FC_NR_AEN_COMMANDS) 2122e399441dSJames Smart return; 2123e399441dSJames Smart 212461bff8efSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 212561bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 212661bff8efSJames Smart terminating = true; 212761bff8efSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 212861bff8efSJames Smart 212961bff8efSJames Smart if (terminating) 213061bff8efSJames Smart return; 213161bff8efSJames Smart 2132e399441dSJames Smart aen_op = &ctrl->aen_ops[aer_idx]; 2133e399441dSJames Smart 2134e399441dSJames Smart ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, 2135e399441dSJames Smart NVMEFC_FCP_NODATA); 2136e399441dSJames Smart if (ret) 2137e399441dSJames Smart dev_err(ctrl->ctrl.device, 2138e399441dSJames Smart "failed async event work [%d]\n", aer_idx); 2139e399441dSJames Smart } 2140e399441dSJames Smart 2141e399441dSJames Smart static void 214278a7ac26SJames Smart __nvme_fc_final_op_cleanup(struct request *rq) 2143e399441dSJames Smart { 2144e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 2145e399441dSJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 2146e399441dSJames Smart 214778a7ac26SJames Smart atomic_set(&op->state, FCPOP_STATE_IDLE); 214878a7ac26SJames Smart op->flags &= ~(FCOP_FLAGS_TERMIO | FCOP_FLAGS_RELEASED | 214978a7ac26SJames Smart FCOP_FLAGS_COMPLETE); 2150e399441dSJames Smart 2151e399441dSJames Smart nvme_fc_unmap_data(ctrl, rq, op); 215277f02a7aSChristoph Hellwig nvme_complete_rq(rq); 2153e399441dSJames Smart nvme_fc_ctrl_put(ctrl); 2154e399441dSJames Smart 2155e399441dSJames Smart } 2156e399441dSJames Smart 215778a7ac26SJames Smart static void 215878a7ac26SJames Smart nvme_fc_complete_rq(struct request *rq) 215978a7ac26SJames Smart { 216078a7ac26SJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); 216178a7ac26SJames Smart struct nvme_fc_ctrl *ctrl = op->ctrl; 216278a7ac26SJames Smart unsigned long flags; 216378a7ac26SJames Smart bool completed = false; 216478a7ac26SJames Smart 216578a7ac26SJames Smart /* 216678a7ac26SJames Smart * the core layer, on controller resets after calling 216778a7ac26SJames Smart * nvme_shutdown_ctrl(), calls complete_rq without our 216878a7ac26SJames Smart * calling blk_mq_complete_request(), thus there may still 216978a7ac26SJames Smart * be live i/o outstanding with the LLDD. Means transport has 217078a7ac26SJames Smart * to track complete calls vs fcpio_done calls to know what 217178a7ac26SJames Smart * path to take on completes and dones. 217278a7ac26SJames Smart */ 217378a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 217478a7ac26SJames Smart if (op->flags & FCOP_FLAGS_COMPLETE) 217578a7ac26SJames Smart completed = true; 217678a7ac26SJames Smart else 217778a7ac26SJames Smart op->flags |= FCOP_FLAGS_RELEASED; 217878a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 217978a7ac26SJames Smart 218078a7ac26SJames Smart if (completed) 218178a7ac26SJames Smart __nvme_fc_final_op_cleanup(rq); 218278a7ac26SJames Smart } 218378a7ac26SJames Smart 2184e399441dSJames Smart /* 2185e399441dSJames Smart * This routine is used by the transport when it needs to find active 2186e399441dSJames Smart * io on a queue that is to be terminated. The transport uses 2187e399441dSJames Smart * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke 2188e399441dSJames Smart * this routine to kill them on a 1 by 1 basis. 2189e399441dSJames Smart * 2190e399441dSJames Smart * As FC allocates FC exchange for each io, the transport must contact 2191e399441dSJames Smart * the LLDD to terminate the exchange, thus releasing the FC exchange. 2192e399441dSJames Smart * After terminating the exchange the LLDD will call the transport's 2193e399441dSJames Smart * normal io done path for the request, but it will have an aborted 2194e399441dSJames Smart * status. The done path will return the io request back to the block 2195e399441dSJames Smart * layer with an error status. 2196e399441dSJames Smart */ 2197e399441dSJames Smart static void 2198e399441dSJames Smart nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) 2199e399441dSJames Smart { 2200e399441dSJames Smart struct nvme_ctrl *nctrl = data; 2201e399441dSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 2202e399441dSJames Smart struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); 220378a7ac26SJames Smart unsigned long flags; 2204e399441dSJames Smart int status; 2205e399441dSJames Smart 2206e399441dSJames Smart if (!blk_mq_request_started(req)) 2207e399441dSJames Smart return; 2208e399441dSJames Smart 220978a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 221061bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) { 221161bff8efSJames Smart ctrl->iocnt++; 221278a7ac26SJames Smart op->flags |= FCOP_FLAGS_TERMIO; 221361bff8efSJames Smart } 221478a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 221578a7ac26SJames Smart 2216e399441dSJames Smart status = __nvme_fc_abort_op(ctrl, op); 221778a7ac26SJames Smart if (status) { 2218e399441dSJames Smart /* 221978a7ac26SJames Smart * if __nvme_fc_abort_op failed the io wasn't 222078a7ac26SJames Smart * active. Thus this call path is running in 222178a7ac26SJames Smart * parallel to the io complete. Treat as non-error. 2222e399441dSJames Smart */ 222378a7ac26SJames Smart 222478a7ac26SJames Smart /* back out the flags/counters */ 222578a7ac26SJames Smart spin_lock_irqsave(&ctrl->lock, flags); 222661bff8efSJames Smart if (ctrl->flags & FCCTRL_TERMIO) 222761bff8efSJames Smart ctrl->iocnt--; 222878a7ac26SJames Smart op->flags &= ~FCOP_FLAGS_TERMIO; 222978a7ac26SJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 2230e399441dSJames Smart return; 2231e399441dSJames Smart } 223278a7ac26SJames Smart } 2233e399441dSJames Smart 2234e399441dSJames Smart 223561bff8efSJames Smart static const struct blk_mq_ops nvme_fc_mq_ops = { 223661bff8efSJames Smart .queue_rq = nvme_fc_queue_rq, 223761bff8efSJames Smart .complete = nvme_fc_complete_rq, 223861bff8efSJames Smart .init_request = nvme_fc_init_request, 223961bff8efSJames Smart .exit_request = nvme_fc_exit_request, 224061bff8efSJames Smart .init_hctx = nvme_fc_init_hctx, 224161bff8efSJames Smart .poll = nvme_fc_poll, 224261bff8efSJames Smart .timeout = nvme_fc_timeout, 2243e399441dSJames Smart }; 2244e399441dSJames Smart 2245e399441dSJames Smart static int 2246e399441dSJames Smart nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) 2247e399441dSJames Smart { 2248e399441dSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 22497314183dSSagi Grimberg unsigned int nr_io_queues; 2250e399441dSJames Smart int ret; 2251e399441dSJames Smart 22527314183dSSagi Grimberg nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), 22537314183dSSagi Grimberg ctrl->lport->ops->max_hw_queues); 22547314183dSSagi Grimberg ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); 2255e399441dSJames Smart if (ret) { 2256e399441dSJames Smart dev_info(ctrl->ctrl.device, 2257e399441dSJames Smart "set_queue_count failed: %d\n", ret); 2258e399441dSJames Smart return ret; 2259e399441dSJames Smart } 2260e399441dSJames Smart 22617314183dSSagi Grimberg ctrl->ctrl.queue_count = nr_io_queues + 1; 22627314183dSSagi Grimberg if (!nr_io_queues) 2263e399441dSJames Smart return 0; 2264e399441dSJames Smart 2265e399441dSJames Smart nvme_fc_init_io_queues(ctrl); 2266e399441dSJames Smart 2267e399441dSJames Smart memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); 2268e399441dSJames Smart ctrl->tag_set.ops = &nvme_fc_mq_ops; 2269e399441dSJames Smart ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; 2270e399441dSJames Smart ctrl->tag_set.reserved_tags = 1; /* fabric connect */ 2271e399441dSJames Smart ctrl->tag_set.numa_node = NUMA_NO_NODE; 2272e399441dSJames Smart ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; 2273e399441dSJames Smart ctrl->tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + 2274e399441dSJames Smart (SG_CHUNK_SIZE * 2275e399441dSJames Smart sizeof(struct scatterlist)) + 2276e399441dSJames Smart ctrl->lport->ops->fcprqst_priv_sz; 2277e399441dSJames Smart ctrl->tag_set.driver_data = ctrl; 2278d858e5f0SSagi Grimberg ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1; 2279e399441dSJames Smart ctrl->tag_set.timeout = NVME_IO_TIMEOUT; 2280e399441dSJames Smart 2281e399441dSJames Smart ret = blk_mq_alloc_tag_set(&ctrl->tag_set); 2282e399441dSJames Smart if (ret) 2283e399441dSJames Smart return ret; 2284e399441dSJames Smart 2285e399441dSJames Smart ctrl->ctrl.tagset = &ctrl->tag_set; 2286e399441dSJames Smart 2287e399441dSJames Smart ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); 2288e399441dSJames Smart if (IS_ERR(ctrl->ctrl.connect_q)) { 2289e399441dSJames Smart ret = PTR_ERR(ctrl->ctrl.connect_q); 2290e399441dSJames Smart goto out_free_tag_set; 2291e399441dSJames Smart } 2292e399441dSJames Smart 2293e399441dSJames Smart ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 2294e399441dSJames Smart if (ret) 2295e399441dSJames Smart goto out_cleanup_blk_queue; 2296e399441dSJames Smart 2297e399441dSJames Smart ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 2298e399441dSJames Smart if (ret) 2299e399441dSJames Smart goto out_delete_hw_queues; 2300e399441dSJames Smart 2301e399441dSJames Smart return 0; 2302e399441dSJames Smart 2303e399441dSJames Smart out_delete_hw_queues: 2304e399441dSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 2305e399441dSJames Smart out_cleanup_blk_queue: 2306e399441dSJames Smart blk_cleanup_queue(ctrl->ctrl.connect_q); 2307e399441dSJames Smart out_free_tag_set: 2308e399441dSJames Smart blk_mq_free_tag_set(&ctrl->tag_set); 2309e399441dSJames Smart nvme_fc_free_io_queues(ctrl); 2310e399441dSJames Smart 2311e399441dSJames Smart /* force put free routine to ignore io queues */ 2312e399441dSJames Smart ctrl->ctrl.tagset = NULL; 2313e399441dSJames Smart 2314e399441dSJames Smart return ret; 2315e399441dSJames Smart } 2316e399441dSJames Smart 231761bff8efSJames Smart static int 231861bff8efSJames Smart nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl) 231961bff8efSJames Smart { 232061bff8efSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 23217314183dSSagi Grimberg unsigned int nr_io_queues; 232261bff8efSJames Smart int ret; 232361bff8efSJames Smart 23247314183dSSagi Grimberg nr_io_queues = min(min(opts->nr_io_queues, num_online_cpus()), 23257314183dSSagi Grimberg ctrl->lport->ops->max_hw_queues); 23267314183dSSagi Grimberg ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); 232761bff8efSJames Smart if (ret) { 232861bff8efSJames Smart dev_info(ctrl->ctrl.device, 232961bff8efSJames Smart "set_queue_count failed: %d\n", ret); 233061bff8efSJames Smart return ret; 233161bff8efSJames Smart } 233261bff8efSJames Smart 23337314183dSSagi Grimberg ctrl->ctrl.queue_count = nr_io_queues + 1; 233461bff8efSJames Smart /* check for io queues existing */ 2335d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count == 1) 233661bff8efSJames Smart return 0; 233761bff8efSJames Smart 233861bff8efSJames Smart nvme_fc_init_io_queues(ctrl); 233961bff8efSJames Smart 2340d352ae20SBart Van Assche ret = blk_mq_reinit_tagset(&ctrl->tag_set, nvme_fc_reinit_request); 234161bff8efSJames Smart if (ret) 234261bff8efSJames Smart goto out_free_io_queues; 234361bff8efSJames Smart 234461bff8efSJames Smart ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 234561bff8efSJames Smart if (ret) 234661bff8efSJames Smart goto out_free_io_queues; 234761bff8efSJames Smart 234861bff8efSJames Smart ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); 234961bff8efSJames Smart if (ret) 235061bff8efSJames Smart goto out_delete_hw_queues; 235161bff8efSJames Smart 2352cda5fd1aSSagi Grimberg blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); 2353cda5fd1aSSagi Grimberg 235461bff8efSJames Smart return 0; 235561bff8efSJames Smart 235661bff8efSJames Smart out_delete_hw_queues: 235761bff8efSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 235861bff8efSJames Smart out_free_io_queues: 235961bff8efSJames Smart nvme_fc_free_io_queues(ctrl); 236061bff8efSJames Smart return ret; 236161bff8efSJames Smart } 236261bff8efSJames Smart 236361bff8efSJames Smart /* 236461bff8efSJames Smart * This routine restarts the controller on the host side, and 236561bff8efSJames Smart * on the link side, recreates the controller association. 236661bff8efSJames Smart */ 236761bff8efSJames Smart static int 236861bff8efSJames Smart nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) 236961bff8efSJames Smart { 237061bff8efSJames Smart struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 237161bff8efSJames Smart u32 segs; 237261bff8efSJames Smart int ret; 237361bff8efSJames Smart bool changed; 237461bff8efSJames Smart 2375fdf9dfa8SSagi Grimberg ++ctrl->ctrl.nr_reconnects; 237661bff8efSJames Smart 237761bff8efSJames Smart /* 237861bff8efSJames Smart * Create the admin queue 237961bff8efSJames Smart */ 238061bff8efSJames Smart 238161bff8efSJames Smart nvme_fc_init_queue(ctrl, 0, NVME_FC_AQ_BLKMQ_DEPTH); 238261bff8efSJames Smart 238361bff8efSJames Smart ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, 238461bff8efSJames Smart NVME_FC_AQ_BLKMQ_DEPTH); 238561bff8efSJames Smart if (ret) 238661bff8efSJames Smart goto out_free_queue; 238761bff8efSJames Smart 238861bff8efSJames Smart ret = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], 238961bff8efSJames Smart NVME_FC_AQ_BLKMQ_DEPTH, 239061bff8efSJames Smart (NVME_FC_AQ_BLKMQ_DEPTH / 4)); 239161bff8efSJames Smart if (ret) 239261bff8efSJames Smart goto out_delete_hw_queue; 239361bff8efSJames Smart 239461bff8efSJames Smart if (ctrl->ctrl.state != NVME_CTRL_NEW) 2395f9c5af5fSSagi Grimberg blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); 239661bff8efSJames Smart 239761bff8efSJames Smart ret = nvmf_connect_admin_queue(&ctrl->ctrl); 239861bff8efSJames Smart if (ret) 239961bff8efSJames Smart goto out_disconnect_admin_queue; 240061bff8efSJames Smart 240161bff8efSJames Smart /* 240261bff8efSJames Smart * Check controller capabilities 240361bff8efSJames Smart * 240461bff8efSJames Smart * todo:- add code to check if ctrl attributes changed from 240561bff8efSJames Smart * prior connection values 240661bff8efSJames Smart */ 240761bff8efSJames Smart 240820d0dfe6SSagi Grimberg ret = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->ctrl.cap); 240961bff8efSJames Smart if (ret) { 241061bff8efSJames Smart dev_err(ctrl->ctrl.device, 241161bff8efSJames Smart "prop_get NVME_REG_CAP failed\n"); 241261bff8efSJames Smart goto out_disconnect_admin_queue; 241361bff8efSJames Smart } 241461bff8efSJames Smart 241561bff8efSJames Smart ctrl->ctrl.sqsize = 241620d0dfe6SSagi Grimberg min_t(int, NVME_CAP_MQES(ctrl->ctrl.cap) + 1, ctrl->ctrl.sqsize); 241761bff8efSJames Smart 241820d0dfe6SSagi Grimberg ret = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); 241961bff8efSJames Smart if (ret) 242061bff8efSJames Smart goto out_disconnect_admin_queue; 242161bff8efSJames Smart 242261bff8efSJames Smart segs = min_t(u32, NVME_FC_MAX_SEGMENTS, 242361bff8efSJames Smart ctrl->lport->ops->max_sgl_segments); 242461bff8efSJames Smart ctrl->ctrl.max_hw_sectors = (segs - 1) << (PAGE_SHIFT - 9); 242561bff8efSJames Smart 242661bff8efSJames Smart ret = nvme_init_identify(&ctrl->ctrl); 242761bff8efSJames Smart if (ret) 242861bff8efSJames Smart goto out_disconnect_admin_queue; 242961bff8efSJames Smart 243061bff8efSJames Smart /* sanity checks */ 243161bff8efSJames Smart 243261bff8efSJames Smart /* FC-NVME does not have other data in the capsule */ 243361bff8efSJames Smart if (ctrl->ctrl.icdoff) { 243461bff8efSJames Smart dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", 243561bff8efSJames Smart ctrl->ctrl.icdoff); 243661bff8efSJames Smart goto out_disconnect_admin_queue; 243761bff8efSJames Smart } 243861bff8efSJames Smart 243961bff8efSJames Smart /* FC-NVME supports normal SGL Data Block Descriptors */ 244061bff8efSJames Smart 244161bff8efSJames Smart if (opts->queue_size > ctrl->ctrl.maxcmd) { 244261bff8efSJames Smart /* warn if maxcmd is lower than queue_size */ 244361bff8efSJames Smart dev_warn(ctrl->ctrl.device, 244461bff8efSJames Smart "queue_size %zu > ctrl maxcmd %u, reducing " 244561bff8efSJames Smart "to queue_size\n", 244661bff8efSJames Smart opts->queue_size, ctrl->ctrl.maxcmd); 244761bff8efSJames Smart opts->queue_size = ctrl->ctrl.maxcmd; 244861bff8efSJames Smart } 244961bff8efSJames Smart 245061bff8efSJames Smart ret = nvme_fc_init_aen_ops(ctrl); 245161bff8efSJames Smart if (ret) 245261bff8efSJames Smart goto out_term_aen_ops; 245361bff8efSJames Smart 245461bff8efSJames Smart /* 245561bff8efSJames Smart * Create the io queues 245661bff8efSJames Smart */ 245761bff8efSJames Smart 2458d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count > 1) { 245961bff8efSJames Smart if (ctrl->ctrl.state == NVME_CTRL_NEW) 246061bff8efSJames Smart ret = nvme_fc_create_io_queues(ctrl); 246161bff8efSJames Smart else 246261bff8efSJames Smart ret = nvme_fc_reinit_io_queues(ctrl); 246361bff8efSJames Smart if (ret) 246461bff8efSJames Smart goto out_term_aen_ops; 246561bff8efSJames Smart } 246661bff8efSJames Smart 246761bff8efSJames Smart changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); 246861bff8efSJames Smart WARN_ON_ONCE(!changed); 246961bff8efSJames Smart 2470fdf9dfa8SSagi Grimberg ctrl->ctrl.nr_reconnects = 0; 247161bff8efSJames Smart 2472d09f2b45SSagi Grimberg nvme_start_ctrl(&ctrl->ctrl); 247361bff8efSJames Smart 247461bff8efSJames Smart return 0; /* Success */ 247561bff8efSJames Smart 247661bff8efSJames Smart out_term_aen_ops: 247761bff8efSJames Smart nvme_fc_term_aen_ops(ctrl); 247861bff8efSJames Smart out_disconnect_admin_queue: 247961bff8efSJames Smart /* send a Disconnect(association) LS to fc-nvme target */ 248061bff8efSJames Smart nvme_fc_xmt_disconnect_assoc(ctrl); 248161bff8efSJames Smart out_delete_hw_queue: 248261bff8efSJames Smart __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); 248361bff8efSJames Smart out_free_queue: 248461bff8efSJames Smart nvme_fc_free_queue(&ctrl->queues[0]); 248561bff8efSJames Smart 248661bff8efSJames Smart return ret; 248761bff8efSJames Smart } 248861bff8efSJames Smart 248961bff8efSJames Smart /* 249061bff8efSJames Smart * This routine stops operation of the controller on the host side. 249161bff8efSJames Smart * On the host os stack side: Admin and IO queues are stopped, 249261bff8efSJames Smart * outstanding ios on them terminated via FC ABTS. 249361bff8efSJames Smart * On the link side: the association is terminated. 249461bff8efSJames Smart */ 249561bff8efSJames Smart static void 249661bff8efSJames Smart nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl) 249761bff8efSJames Smart { 249861bff8efSJames Smart unsigned long flags; 249961bff8efSJames Smart 250061bff8efSJames Smart spin_lock_irqsave(&ctrl->lock, flags); 250161bff8efSJames Smart ctrl->flags |= FCCTRL_TERMIO; 250261bff8efSJames Smart ctrl->iocnt = 0; 250361bff8efSJames Smart spin_unlock_irqrestore(&ctrl->lock, flags); 250461bff8efSJames Smart 250561bff8efSJames Smart /* 250661bff8efSJames Smart * If io queues are present, stop them and terminate all outstanding 250761bff8efSJames Smart * ios on them. As FC allocates FC exchange for each io, the 250861bff8efSJames Smart * transport must contact the LLDD to terminate the exchange, 250961bff8efSJames Smart * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() 251061bff8efSJames Smart * to tell us what io's are busy and invoke a transport routine 251161bff8efSJames Smart * to kill them with the LLDD. After terminating the exchange 251261bff8efSJames Smart * the LLDD will call the transport's normal io done path, but it 251361bff8efSJames Smart * will have an aborted status. The done path will return the 251461bff8efSJames Smart * io requests back to the block layer as part of normal completions 251561bff8efSJames Smart * (but with error status). 251661bff8efSJames Smart */ 2517d858e5f0SSagi Grimberg if (ctrl->ctrl.queue_count > 1) { 251861bff8efSJames Smart nvme_stop_queues(&ctrl->ctrl); 251961bff8efSJames Smart blk_mq_tagset_busy_iter(&ctrl->tag_set, 252061bff8efSJames Smart nvme_fc_terminate_exchange, &ctrl->ctrl); 252161bff8efSJames Smart } 252261bff8efSJames Smart 252361bff8efSJames Smart /* 252461bff8efSJames Smart * Other transports, which don't have link-level contexts bound 252561bff8efSJames Smart * to sqe's, would try to gracefully shutdown the controller by 252661bff8efSJames Smart * writing the registers for shutdown and polling (call 252761bff8efSJames Smart * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially 252861bff8efSJames Smart * just aborted and we will wait on those contexts, and given 252961bff8efSJames Smart * there was no indication of how live the controlelr is on the 253061bff8efSJames Smart * link, don't send more io to create more contexts for the 253161bff8efSJames Smart * shutdown. Let the controller fail via keepalive failure if 253261bff8efSJames Smart * its still present. 253361bff8efSJames Smart */ 253461bff8efSJames Smart 253561bff8efSJames Smart /* 253661bff8efSJames Smart * clean up the admin queue. Same thing as above. 253761bff8efSJames Smart * use blk_mq_tagset_busy_itr() and the transport routine to 253861bff8efSJames Smart * terminate the exchanges. 253961bff8efSJames Smart */ 2540f9c5af5fSSagi Grimberg blk_mq_quiesce_queue(ctrl->ctrl.admin_q); 254161bff8efSJames Smart blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, 254261bff8efSJames Smart nvme_fc_terminate_exchange, &ctrl->ctrl); 254361bff8efSJames Smart 254461bff8efSJames Smart /* kill the aens as they are a separate path */ 254561bff8efSJames Smart nvme_fc_abort_aen_ops(ctrl); 254661bff8efSJames Smart 254761bff8efSJames Smart /* wait for all io that had to be aborted */ 25488a82dbf1SJames Smart spin_lock_irq(&ctrl->lock); 254936715cf4SJames Smart wait_event_lock_irq(ctrl->ioabort_wait, ctrl->iocnt == 0, ctrl->lock); 255061bff8efSJames Smart ctrl->flags &= ~FCCTRL_TERMIO; 25518a82dbf1SJames Smart spin_unlock_irq(&ctrl->lock); 255261bff8efSJames Smart 255361bff8efSJames Smart nvme_fc_term_aen_ops(ctrl); 255461bff8efSJames Smart 255561bff8efSJames Smart /* 255661bff8efSJames Smart * send a Disconnect(association) LS to fc-nvme target 255761bff8efSJames Smart * Note: could have been sent at top of process, but 255861bff8efSJames Smart * cleaner on link traffic if after the aborts complete. 255961bff8efSJames Smart * Note: if association doesn't exist, association_id will be 0 256061bff8efSJames Smart */ 256161bff8efSJames Smart if (ctrl->association_id) 256261bff8efSJames Smart nvme_fc_xmt_disconnect_assoc(ctrl); 256361bff8efSJames Smart 256461bff8efSJames Smart if (ctrl->ctrl.tagset) { 256561bff8efSJames Smart nvme_fc_delete_hw_io_queues(ctrl); 256661bff8efSJames Smart nvme_fc_free_io_queues(ctrl); 256761bff8efSJames Smart } 256861bff8efSJames Smart 256961bff8efSJames Smart __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); 257061bff8efSJames Smart nvme_fc_free_queue(&ctrl->queues[0]); 257161bff8efSJames Smart } 257261bff8efSJames Smart 257361bff8efSJames Smart static void 257461bff8efSJames Smart nvme_fc_delete_ctrl_work(struct work_struct *work) 257561bff8efSJames Smart { 257661bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 257761bff8efSJames Smart container_of(work, struct nvme_fc_ctrl, delete_work); 257861bff8efSJames Smart 2579d86c4d8eSChristoph Hellwig cancel_work_sync(&ctrl->ctrl.reset_work); 258061bff8efSJames Smart cancel_delayed_work_sync(&ctrl->connect_work); 2581d09f2b45SSagi Grimberg nvme_stop_ctrl(&ctrl->ctrl); 2582d09f2b45SSagi Grimberg nvme_remove_namespaces(&ctrl->ctrl); 258361bff8efSJames Smart /* 258461bff8efSJames Smart * kill the association on the link side. this will block 258561bff8efSJames Smart * waiting for io to terminate 258661bff8efSJames Smart */ 258761bff8efSJames Smart nvme_fc_delete_association(ctrl); 258861bff8efSJames Smart 258961bff8efSJames Smart /* 259061bff8efSJames Smart * tear down the controller 2591a5321aa5SJames Smart * After the last reference on the nvme ctrl is removed, 2592a5321aa5SJames Smart * the transport nvme_fc_nvme_ctrl_freed() callback will be 2593a5321aa5SJames Smart * invoked. From there, the transport will tear down it's 2594a5321aa5SJames Smart * logical queues and association. 259561bff8efSJames Smart */ 259661bff8efSJames Smart nvme_uninit_ctrl(&ctrl->ctrl); 259761bff8efSJames Smart 259861bff8efSJames Smart nvme_put_ctrl(&ctrl->ctrl); 259961bff8efSJames Smart } 260061bff8efSJames Smart 26015bbecdbcSJames Smart static bool 26025bbecdbcSJames Smart __nvme_fc_schedule_delete_work(struct nvme_fc_ctrl *ctrl) 26035bbecdbcSJames Smart { 26045bbecdbcSJames Smart if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING)) 26055bbecdbcSJames Smart return true; 26065bbecdbcSJames Smart 26079a6327d2SSagi Grimberg if (!queue_work(nvme_wq, &ctrl->delete_work)) 26085bbecdbcSJames Smart return true; 26095bbecdbcSJames Smart 26105bbecdbcSJames Smart return false; 26115bbecdbcSJames Smart } 26125bbecdbcSJames Smart 261361bff8efSJames Smart static int 261461bff8efSJames Smart __nvme_fc_del_ctrl(struct nvme_fc_ctrl *ctrl) 261561bff8efSJames Smart { 26165bbecdbcSJames Smart return __nvme_fc_schedule_delete_work(ctrl) ? -EBUSY : 0; 261761bff8efSJames Smart } 261861bff8efSJames Smart 261961bff8efSJames Smart /* 262061bff8efSJames Smart * Request from nvme core layer to delete the controller 262161bff8efSJames Smart */ 262261bff8efSJames Smart static int 262361bff8efSJames Smart nvme_fc_del_nvme_ctrl(struct nvme_ctrl *nctrl) 262461bff8efSJames Smart { 262561bff8efSJames Smart struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); 262661bff8efSJames Smart int ret; 262761bff8efSJames Smart 262861bff8efSJames Smart if (!kref_get_unless_zero(&ctrl->ctrl.kref)) 262961bff8efSJames Smart return -EBUSY; 263061bff8efSJames Smart 263161bff8efSJames Smart ret = __nvme_fc_del_ctrl(ctrl); 263261bff8efSJames Smart 263361bff8efSJames Smart if (!ret) 26349a6327d2SSagi Grimberg flush_workqueue(nvme_wq); 263561bff8efSJames Smart 263661bff8efSJames Smart nvme_put_ctrl(&ctrl->ctrl); 263761bff8efSJames Smart 263861bff8efSJames Smart return ret; 263961bff8efSJames Smart } 264061bff8efSJames Smart 264161bff8efSJames Smart static void 26425bbecdbcSJames Smart nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status) 26435bbecdbcSJames Smart { 26445bbecdbcSJames Smart /* If we are resetting/deleting then do nothing */ 26455bbecdbcSJames Smart if (ctrl->ctrl.state != NVME_CTRL_RECONNECTING) { 26465bbecdbcSJames Smart WARN_ON_ONCE(ctrl->ctrl.state == NVME_CTRL_NEW || 26475bbecdbcSJames Smart ctrl->ctrl.state == NVME_CTRL_LIVE); 26485bbecdbcSJames Smart return; 26495bbecdbcSJames Smart } 26505bbecdbcSJames Smart 2651589ff775SJames Smart dev_info(ctrl->ctrl.device, 26525bbecdbcSJames Smart "NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n", 26535bbecdbcSJames Smart ctrl->cnum, status); 26545bbecdbcSJames Smart 26555bbecdbcSJames Smart if (nvmf_should_reconnect(&ctrl->ctrl)) { 26565bbecdbcSJames Smart dev_info(ctrl->ctrl.device, 26575bbecdbcSJames Smart "NVME-FC{%d}: Reconnect attempt in %d seconds.\n", 26585bbecdbcSJames Smart ctrl->cnum, ctrl->ctrl.opts->reconnect_delay); 26599a6327d2SSagi Grimberg queue_delayed_work(nvme_wq, &ctrl->connect_work, 26605bbecdbcSJames Smart ctrl->ctrl.opts->reconnect_delay * HZ); 26615bbecdbcSJames Smart } else { 2662589ff775SJames Smart dev_warn(ctrl->ctrl.device, 26635bbecdbcSJames Smart "NVME-FC{%d}: Max reconnect attempts (%d) " 26645bbecdbcSJames Smart "reached. Removing controller\n", 2665fdf9dfa8SSagi Grimberg ctrl->cnum, ctrl->ctrl.nr_reconnects); 26665bbecdbcSJames Smart WARN_ON(__nvme_fc_schedule_delete_work(ctrl)); 26675bbecdbcSJames Smart } 26685bbecdbcSJames Smart } 26695bbecdbcSJames Smart 26705bbecdbcSJames Smart static void 267161bff8efSJames Smart nvme_fc_reset_ctrl_work(struct work_struct *work) 267261bff8efSJames Smart { 267361bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 2674d86c4d8eSChristoph Hellwig container_of(work, struct nvme_fc_ctrl, ctrl.reset_work); 267561bff8efSJames Smart int ret; 267661bff8efSJames Smart 2677d09f2b45SSagi Grimberg nvme_stop_ctrl(&ctrl->ctrl); 267861bff8efSJames Smart /* will block will waiting for io to terminate */ 267961bff8efSJames Smart nvme_fc_delete_association(ctrl); 268061bff8efSJames Smart 268161bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 26825bbecdbcSJames Smart if (ret) 26835bbecdbcSJames Smart nvme_fc_reconnect_or_delete(ctrl, ret); 26845bbecdbcSJames Smart else 268561bff8efSJames Smart dev_info(ctrl->ctrl.device, 268661bff8efSJames Smart "NVME-FC{%d}: controller reset complete\n", ctrl->cnum); 268761bff8efSJames Smart } 268861bff8efSJames Smart 268961bff8efSJames Smart static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { 269061bff8efSJames Smart .name = "fc", 269161bff8efSJames Smart .module = THIS_MODULE, 2692d3d5b87dSChristoph Hellwig .flags = NVME_F_FABRICS, 269361bff8efSJames Smart .reg_read32 = nvmf_reg_read32, 269461bff8efSJames Smart .reg_read64 = nvmf_reg_read64, 269561bff8efSJames Smart .reg_write32 = nvmf_reg_write32, 269661bff8efSJames Smart .free_ctrl = nvme_fc_nvme_ctrl_freed, 269761bff8efSJames Smart .submit_async_event = nvme_fc_submit_async_event, 269861bff8efSJames Smart .delete_ctrl = nvme_fc_del_nvme_ctrl, 269961bff8efSJames Smart .get_address = nvmf_get_address, 270061bff8efSJames Smart }; 270161bff8efSJames Smart 270261bff8efSJames Smart static void 270361bff8efSJames Smart nvme_fc_connect_ctrl_work(struct work_struct *work) 270461bff8efSJames Smart { 270561bff8efSJames Smart int ret; 270661bff8efSJames Smart 270761bff8efSJames Smart struct nvme_fc_ctrl *ctrl = 270861bff8efSJames Smart container_of(to_delayed_work(work), 270961bff8efSJames Smart struct nvme_fc_ctrl, connect_work); 271061bff8efSJames Smart 271161bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 27125bbecdbcSJames Smart if (ret) 27135bbecdbcSJames Smart nvme_fc_reconnect_or_delete(ctrl, ret); 27145bbecdbcSJames Smart else 271561bff8efSJames Smart dev_info(ctrl->ctrl.device, 271661bff8efSJames Smart "NVME-FC{%d}: controller reconnect complete\n", 271761bff8efSJames Smart ctrl->cnum); 271861bff8efSJames Smart } 271961bff8efSJames Smart 272061bff8efSJames Smart 272161bff8efSJames Smart static const struct blk_mq_ops nvme_fc_admin_mq_ops = { 272261bff8efSJames Smart .queue_rq = nvme_fc_queue_rq, 272361bff8efSJames Smart .complete = nvme_fc_complete_rq, 272476f983cbSChristoph Hellwig .init_request = nvme_fc_init_request, 272561bff8efSJames Smart .exit_request = nvme_fc_exit_request, 272661bff8efSJames Smart .init_hctx = nvme_fc_init_admin_hctx, 272761bff8efSJames Smart .timeout = nvme_fc_timeout, 272861bff8efSJames Smart }; 272961bff8efSJames Smart 2730e399441dSJames Smart 2731e399441dSJames Smart static struct nvme_ctrl * 273261bff8efSJames Smart nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, 2733e399441dSJames Smart struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) 2734e399441dSJames Smart { 2735e399441dSJames Smart struct nvme_fc_ctrl *ctrl; 2736e399441dSJames Smart unsigned long flags; 2737e399441dSJames Smart int ret, idx; 2738e399441dSJames Smart 273985e6a6adSJames Smart if (!(rport->remoteport.port_role & 274085e6a6adSJames Smart (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) { 274185e6a6adSJames Smart ret = -EBADR; 274285e6a6adSJames Smart goto out_fail; 274385e6a6adSJames Smart } 274485e6a6adSJames Smart 2745e399441dSJames Smart ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 2746e399441dSJames Smart if (!ctrl) { 2747e399441dSJames Smart ret = -ENOMEM; 2748e399441dSJames Smart goto out_fail; 2749e399441dSJames Smart } 2750e399441dSJames Smart 2751e399441dSJames Smart idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); 2752e399441dSJames Smart if (idx < 0) { 2753e399441dSJames Smart ret = -ENOSPC; 2754e399441dSJames Smart goto out_free_ctrl; 2755e399441dSJames Smart } 2756e399441dSJames Smart 2757e399441dSJames Smart ctrl->ctrl.opts = opts; 2758e399441dSJames Smart INIT_LIST_HEAD(&ctrl->ctrl_list); 2759e399441dSJames Smart ctrl->lport = lport; 2760e399441dSJames Smart ctrl->rport = rport; 2761e399441dSJames Smart ctrl->dev = lport->dev; 2762e399441dSJames Smart ctrl->cnum = idx; 27638a82dbf1SJames Smart init_waitqueue_head(&ctrl->ioabort_wait); 2764e399441dSJames Smart 2765e399441dSJames Smart get_device(ctrl->dev); 2766e399441dSJames Smart kref_init(&ctrl->ref); 2767e399441dSJames Smart 276861bff8efSJames Smart INIT_WORK(&ctrl->delete_work, nvme_fc_delete_ctrl_work); 2769d86c4d8eSChristoph Hellwig INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work); 277061bff8efSJames Smart INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work); 2771e399441dSJames Smart spin_lock_init(&ctrl->lock); 2772e399441dSJames Smart 2773e399441dSJames Smart /* io queue count */ 2774d858e5f0SSagi Grimberg ctrl->ctrl.queue_count = min_t(unsigned int, 2775e399441dSJames Smart opts->nr_io_queues, 2776e399441dSJames Smart lport->ops->max_hw_queues); 2777d858e5f0SSagi Grimberg ctrl->ctrl.queue_count++; /* +1 for admin queue */ 2778e399441dSJames Smart 2779e399441dSJames Smart ctrl->ctrl.sqsize = opts->queue_size - 1; 2780e399441dSJames Smart ctrl->ctrl.kato = opts->kato; 2781e399441dSJames Smart 2782e399441dSJames Smart ret = -ENOMEM; 2783d858e5f0SSagi Grimberg ctrl->queues = kcalloc(ctrl->ctrl.queue_count, 2784d858e5f0SSagi Grimberg sizeof(struct nvme_fc_queue), GFP_KERNEL); 2785e399441dSJames Smart if (!ctrl->queues) 278661bff8efSJames Smart goto out_free_ida; 2787e399441dSJames Smart 278861bff8efSJames Smart memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); 278961bff8efSJames Smart ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; 279061bff8efSJames Smart ctrl->admin_tag_set.queue_depth = NVME_FC_AQ_BLKMQ_DEPTH; 279161bff8efSJames Smart ctrl->admin_tag_set.reserved_tags = 2; /* fabric connect + Keep-Alive */ 279261bff8efSJames Smart ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; 279361bff8efSJames Smart ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + 279461bff8efSJames Smart (SG_CHUNK_SIZE * 279561bff8efSJames Smart sizeof(struct scatterlist)) + 279661bff8efSJames Smart ctrl->lport->ops->fcprqst_priv_sz; 279761bff8efSJames Smart ctrl->admin_tag_set.driver_data = ctrl; 279861bff8efSJames Smart ctrl->admin_tag_set.nr_hw_queues = 1; 279961bff8efSJames Smart ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; 280061bff8efSJames Smart 280161bff8efSJames Smart ret = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); 2802e399441dSJames Smart if (ret) 280361bff8efSJames Smart goto out_free_queues; 280434b6c231SSagi Grimberg ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; 2805e399441dSJames Smart 280661bff8efSJames Smart ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); 280761bff8efSJames Smart if (IS_ERR(ctrl->ctrl.admin_q)) { 280861bff8efSJames Smart ret = PTR_ERR(ctrl->ctrl.admin_q); 280961bff8efSJames Smart goto out_free_admin_tag_set; 2810e399441dSJames Smart } 2811e399441dSJames Smart 281261bff8efSJames Smart /* 281361bff8efSJames Smart * Would have been nice to init io queues tag set as well. 281461bff8efSJames Smart * However, we require interaction from the controller 281561bff8efSJames Smart * for max io queue count before we can do so. 281661bff8efSJames Smart * Defer this to the connect path. 281761bff8efSJames Smart */ 2818e399441dSJames Smart 281961bff8efSJames Smart ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); 2820e399441dSJames Smart if (ret) 282161bff8efSJames Smart goto out_cleanup_admin_q; 2822e399441dSJames Smart 282361bff8efSJames Smart /* at this point, teardown path changes to ref counting on nvme ctrl */ 2824e399441dSJames Smart 2825e399441dSJames Smart spin_lock_irqsave(&rport->lock, flags); 2826e399441dSJames Smart list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); 2827e399441dSJames Smart spin_unlock_irqrestore(&rport->lock, flags); 2828e399441dSJames Smart 282961bff8efSJames Smart ret = nvme_fc_create_association(ctrl); 283061bff8efSJames Smart if (ret) { 2831de41447aSEwan D. Milne ctrl->ctrl.opts = NULL; 283261bff8efSJames Smart /* initiate nvme ctrl ref counting teardown */ 283361bff8efSJames Smart nvme_uninit_ctrl(&ctrl->ctrl); 283424b7f059SJames Smart nvme_put_ctrl(&ctrl->ctrl); 283561bff8efSJames Smart 28360b5a7669SJames Smart /* Remove core ctrl ref. */ 28370b5a7669SJames Smart nvme_put_ctrl(&ctrl->ctrl); 28380b5a7669SJames Smart 283961bff8efSJames Smart /* as we're past the point where we transition to the ref 284061bff8efSJames Smart * counting teardown path, if we return a bad pointer here, 284161bff8efSJames Smart * the calling routine, thinking it's prior to the 284261bff8efSJames Smart * transition, will do an rport put. Since the teardown 284361bff8efSJames Smart * path also does a rport put, we do an extra get here to 284461bff8efSJames Smart * so proper order/teardown happens. 284561bff8efSJames Smart */ 284661bff8efSJames Smart nvme_fc_rport_get(rport); 284761bff8efSJames Smart 284861bff8efSJames Smart if (ret > 0) 284961bff8efSJames Smart ret = -EIO; 285061bff8efSJames Smart return ERR_PTR(ret); 2851e399441dSJames Smart } 2852e399441dSJames Smart 28532cb657bcSJames Smart kref_get(&ctrl->ctrl.kref); 28542cb657bcSJames Smart 285561bff8efSJames Smart dev_info(ctrl->ctrl.device, 285661bff8efSJames Smart "NVME-FC{%d}: new ctrl: NQN \"%s\"\n", 285761bff8efSJames Smart ctrl->cnum, ctrl->ctrl.opts->subsysnqn); 285861bff8efSJames Smart 2859e399441dSJames Smart return &ctrl->ctrl; 2860e399441dSJames Smart 286161bff8efSJames Smart out_cleanup_admin_q: 286261bff8efSJames Smart blk_cleanup_queue(ctrl->ctrl.admin_q); 286361bff8efSJames Smart out_free_admin_tag_set: 286461bff8efSJames Smart blk_mq_free_tag_set(&ctrl->admin_tag_set); 286561bff8efSJames Smart out_free_queues: 286661bff8efSJames Smart kfree(ctrl->queues); 2867e399441dSJames Smart out_free_ida: 286861bff8efSJames Smart put_device(ctrl->dev); 2869e399441dSJames Smart ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); 2870e399441dSJames Smart out_free_ctrl: 2871e399441dSJames Smart kfree(ctrl); 2872e399441dSJames Smart out_fail: 2873e399441dSJames Smart /* exit via here doesn't follow ctlr ref points */ 2874e399441dSJames Smart return ERR_PTR(ret); 2875e399441dSJames Smart } 2876e399441dSJames Smart 2877e399441dSJames Smart 2878e399441dSJames Smart struct nvmet_fc_traddr { 2879e399441dSJames Smart u64 nn; 2880e399441dSJames Smart u64 pn; 2881e399441dSJames Smart }; 2882e399441dSJames Smart 2883e399441dSJames Smart static int 28849c5358e1SJames Smart __nvme_fc_parse_u64(substring_t *sstr, u64 *val) 2885e399441dSJames Smart { 2886e399441dSJames Smart u64 token64; 2887e399441dSJames Smart 28889c5358e1SJames Smart if (match_u64(sstr, &token64)) 28899c5358e1SJames Smart return -EINVAL; 28909c5358e1SJames Smart *val = token64; 2891e399441dSJames Smart 28929c5358e1SJames Smart return 0; 2893e399441dSJames Smart } 2894e399441dSJames Smart 28959c5358e1SJames Smart /* 28969c5358e1SJames Smart * This routine validates and extracts the WWN's from the TRADDR string. 28979c5358e1SJames Smart * As kernel parsers need the 0x to determine number base, universally 28989c5358e1SJames Smart * build string to parse with 0x prefix before parsing name strings. 28999c5358e1SJames Smart */ 29009c5358e1SJames Smart static int 29019c5358e1SJames Smart nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen) 29029c5358e1SJames Smart { 29039c5358e1SJames Smart char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1]; 29049c5358e1SJames Smart substring_t wwn = { name, &name[sizeof(name)-1] }; 29059c5358e1SJames Smart int nnoffset, pnoffset; 29069c5358e1SJames Smart 29079c5358e1SJames Smart /* validate it string one of the 2 allowed formats */ 29089c5358e1SJames Smart if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH && 29099c5358e1SJames Smart !strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) && 29109c5358e1SJames Smart !strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET], 29119c5358e1SJames Smart "pn-0x", NVME_FC_TRADDR_OXNNLEN)) { 29129c5358e1SJames Smart nnoffset = NVME_FC_TRADDR_OXNNLEN; 29139c5358e1SJames Smart pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET + 29149c5358e1SJames Smart NVME_FC_TRADDR_OXNNLEN; 29159c5358e1SJames Smart } else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH && 29169c5358e1SJames Smart !strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) && 29179c5358e1SJames Smart !strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET], 29189c5358e1SJames Smart "pn-", NVME_FC_TRADDR_NNLEN))) { 29199c5358e1SJames Smart nnoffset = NVME_FC_TRADDR_NNLEN; 29209c5358e1SJames Smart pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN; 29219c5358e1SJames Smart } else 29229c5358e1SJames Smart goto out_einval; 29239c5358e1SJames Smart 29249c5358e1SJames Smart name[0] = '0'; 29259c5358e1SJames Smart name[1] = 'x'; 29269c5358e1SJames Smart name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0; 29279c5358e1SJames Smart 29289c5358e1SJames Smart memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN); 29299c5358e1SJames Smart if (__nvme_fc_parse_u64(&wwn, &traddr->nn)) 29309c5358e1SJames Smart goto out_einval; 29319c5358e1SJames Smart 29329c5358e1SJames Smart memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN); 29339c5358e1SJames Smart if (__nvme_fc_parse_u64(&wwn, &traddr->pn)) 29349c5358e1SJames Smart goto out_einval; 29359c5358e1SJames Smart 29369c5358e1SJames Smart return 0; 29379c5358e1SJames Smart 29389c5358e1SJames Smart out_einval: 29399c5358e1SJames Smart pr_warn("%s: bad traddr string\n", __func__); 29409c5358e1SJames Smart return -EINVAL; 2941e399441dSJames Smart } 2942e399441dSJames Smart 2943e399441dSJames Smart static struct nvme_ctrl * 2944e399441dSJames Smart nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) 2945e399441dSJames Smart { 2946e399441dSJames Smart struct nvme_fc_lport *lport; 2947e399441dSJames Smart struct nvme_fc_rport *rport; 294861bff8efSJames Smart struct nvme_ctrl *ctrl; 2949e399441dSJames Smart struct nvmet_fc_traddr laddr = { 0L, 0L }; 2950e399441dSJames Smart struct nvmet_fc_traddr raddr = { 0L, 0L }; 2951e399441dSJames Smart unsigned long flags; 2952e399441dSJames Smart int ret; 2953e399441dSJames Smart 29549c5358e1SJames Smart ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE); 2955e399441dSJames Smart if (ret || !raddr.nn || !raddr.pn) 2956e399441dSJames Smart return ERR_PTR(-EINVAL); 2957e399441dSJames Smart 29589c5358e1SJames Smart ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE); 2959e399441dSJames Smart if (ret || !laddr.nn || !laddr.pn) 2960e399441dSJames Smart return ERR_PTR(-EINVAL); 2961e399441dSJames Smart 2962e399441dSJames Smart /* find the host and remote ports to connect together */ 2963e399441dSJames Smart spin_lock_irqsave(&nvme_fc_lock, flags); 2964e399441dSJames Smart list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { 2965e399441dSJames Smart if (lport->localport.node_name != laddr.nn || 2966e399441dSJames Smart lport->localport.port_name != laddr.pn) 2967e399441dSJames Smart continue; 2968e399441dSJames Smart 2969e399441dSJames Smart list_for_each_entry(rport, &lport->endp_list, endp_list) { 2970e399441dSJames Smart if (rport->remoteport.node_name != raddr.nn || 2971e399441dSJames Smart rport->remoteport.port_name != raddr.pn) 2972e399441dSJames Smart continue; 2973e399441dSJames Smart 2974e399441dSJames Smart /* if fail to get reference fall through. Will error */ 2975e399441dSJames Smart if (!nvme_fc_rport_get(rport)) 2976e399441dSJames Smart break; 2977e399441dSJames Smart 2978e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 2979e399441dSJames Smart 298061bff8efSJames Smart ctrl = nvme_fc_init_ctrl(dev, opts, lport, rport); 298161bff8efSJames Smart if (IS_ERR(ctrl)) 298261bff8efSJames Smart nvme_fc_rport_put(rport); 298361bff8efSJames Smart return ctrl; 2984e399441dSJames Smart } 2985e399441dSJames Smart } 2986e399441dSJames Smart spin_unlock_irqrestore(&nvme_fc_lock, flags); 2987e399441dSJames Smart 2988e399441dSJames Smart return ERR_PTR(-ENOENT); 2989e399441dSJames Smart } 2990e399441dSJames Smart 2991e399441dSJames Smart 2992e399441dSJames Smart static struct nvmf_transport_ops nvme_fc_transport = { 2993e399441dSJames Smart .name = "fc", 2994e399441dSJames Smart .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, 29955bbecdbcSJames Smart .allowed_opts = NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_CTRL_LOSS_TMO, 2996e399441dSJames Smart .create_ctrl = nvme_fc_create_ctrl, 2997e399441dSJames Smart }; 2998e399441dSJames Smart 2999e399441dSJames Smart static int __init nvme_fc_init_module(void) 3000e399441dSJames Smart { 30019a6327d2SSagi Grimberg return nvmf_register_transport(&nvme_fc_transport); 3002e399441dSJames Smart } 3003e399441dSJames Smart 3004e399441dSJames Smart static void __exit nvme_fc_exit_module(void) 3005e399441dSJames Smart { 3006e399441dSJames Smart /* sanity check - all lports should be removed */ 3007e399441dSJames Smart if (!list_empty(&nvme_fc_lport_list)) 3008e399441dSJames Smart pr_warn("%s: localport list not empty\n", __func__); 3009e399441dSJames Smart 3010e399441dSJames Smart nvmf_unregister_transport(&nvme_fc_transport); 3011e399441dSJames Smart 3012e399441dSJames Smart ida_destroy(&nvme_fc_local_port_cnt); 3013e399441dSJames Smart ida_destroy(&nvme_fc_ctrl_cnt); 3014e399441dSJames Smart } 3015e399441dSJames Smart 3016e399441dSJames Smart module_init(nvme_fc_init_module); 3017e399441dSJames Smart module_exit(nvme_fc_exit_module); 3018e399441dSJames Smart 3019e399441dSJames Smart MODULE_LICENSE("GPL v2"); 3020