1 // SPDX-License-Identifier: GPL-2.0
3 * NVMe over Fabrics RDMA host code.
4 * Copyright (c) 2015-2016 HGST, a Western Digital Company.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 #include <linux/module.h>
8 #include <linux/init.h>
9 #include <linux/slab.h>
10 #include <rdma/mr_pool.h>
11 #include <linux/err.h>
12 #include <linux/string.h>
13 #include <linux/atomic.h>
14 #include <linux/blk-mq.h>
15 #include <linux/blk-mq-rdma.h>
16 #include <linux/types.h>
17 #include <linux/list.h>
18 #include <linux/mutex.h>
19 #include <linux/scatterlist.h>
20 #include <linux/nvme.h>
21 #include <asm/unaligned.h>
23 #include <rdma/ib_verbs.h>
24 #include <rdma/rdma_cm.h>
25 #include <linux/nvme-rdma.h>
31 #define NVME_RDMA_CONNECT_TIMEOUT_MS 3000 /* 3 second */
33 #define NVME_RDMA_MAX_SEGMENTS 256
35 #define NVME_RDMA_MAX_INLINE_SEGMENTS 4
37 struct nvme_rdma_device
{
38 struct ib_device
*dev
;
41 struct list_head entry
;
42 unsigned int num_inline_segments
;
51 struct nvme_rdma_queue
;
52 struct nvme_rdma_request
{
53 struct nvme_request req
;
55 struct nvme_rdma_qe sqe
;
56 union nvme_result result
;
59 struct ib_sge sge
[1 + NVME_RDMA_MAX_INLINE_SEGMENTS
];
62 struct ib_reg_wr reg_wr
;
63 struct ib_cqe reg_cqe
;
64 struct nvme_rdma_queue
*queue
;
65 struct sg_table sg_table
;
66 struct scatterlist first_sgl
[];
69 enum nvme_rdma_queue_flags
{
70 NVME_RDMA_Q_ALLOCATED
= 0,
72 NVME_RDMA_Q_TR_READY
= 2,
75 struct nvme_rdma_queue
{
76 struct nvme_rdma_qe
*rsp_ring
;
78 size_t cmnd_capsule_len
;
79 struct nvme_rdma_ctrl
*ctrl
;
80 struct nvme_rdma_device
*device
;
85 struct rdma_cm_id
*cm_id
;
87 struct completion cm_done
;
90 struct nvme_rdma_ctrl
{
91 /* read only in the hot path */
92 struct nvme_rdma_queue
*queues
;
94 /* other member variables */
95 struct blk_mq_tag_set tag_set
;
96 struct work_struct err_work
;
98 struct nvme_rdma_qe async_event_sqe
;
100 struct delayed_work reconnect_work
;
102 struct list_head list
;
104 struct blk_mq_tag_set admin_tag_set
;
105 struct nvme_rdma_device
*device
;
109 struct sockaddr_storage addr
;
110 struct sockaddr_storage src_addr
;
112 struct nvme_ctrl ctrl
;
113 bool use_inline_data
;
114 u32 io_queues
[HCTX_MAX_TYPES
];
117 static inline struct nvme_rdma_ctrl
*to_rdma_ctrl(struct nvme_ctrl
*ctrl
)
119 return container_of(ctrl
, struct nvme_rdma_ctrl
, ctrl
);
122 static LIST_HEAD(device_list
);
123 static DEFINE_MUTEX(device_list_mutex
);
125 static LIST_HEAD(nvme_rdma_ctrl_list
);
126 static DEFINE_MUTEX(nvme_rdma_ctrl_mutex
);
129 * Disabling this option makes small I/O goes faster, but is fundamentally
130 * unsafe. With it turned off we will have to register a global rkey that
131 * allows read and write access to all physical memory.
133 static bool register_always
= true;
134 module_param(register_always
, bool, 0444);
135 MODULE_PARM_DESC(register_always
,
136 "Use memory registration even for contiguous memory regions");
138 static int nvme_rdma_cm_handler(struct rdma_cm_id
*cm_id
,
139 struct rdma_cm_event
*event
);
140 static void nvme_rdma_recv_done(struct ib_cq
*cq
, struct ib_wc
*wc
);
142 static const struct blk_mq_ops nvme_rdma_mq_ops
;
143 static const struct blk_mq_ops nvme_rdma_admin_mq_ops
;
145 /* XXX: really should move to a generic header sooner or later.. */
146 static inline void put_unaligned_le24(u32 val
, u8
*p
)
153 static inline int nvme_rdma_queue_idx(struct nvme_rdma_queue
*queue
)
155 return queue
- queue
->ctrl
->queues
;
158 static bool nvme_rdma_poll_queue(struct nvme_rdma_queue
*queue
)
160 return nvme_rdma_queue_idx(queue
) >
161 queue
->ctrl
->io_queues
[HCTX_TYPE_DEFAULT
] +
162 queue
->ctrl
->io_queues
[HCTX_TYPE_READ
];
165 static inline size_t nvme_rdma_inline_data_size(struct nvme_rdma_queue
*queue
)
167 return queue
->cmnd_capsule_len
- sizeof(struct nvme_command
);
170 static void nvme_rdma_free_qe(struct ib_device
*ibdev
, struct nvme_rdma_qe
*qe
,
171 size_t capsule_size
, enum dma_data_direction dir
)
173 ib_dma_unmap_single(ibdev
, qe
->dma
, capsule_size
, dir
);
177 static int nvme_rdma_alloc_qe(struct ib_device
*ibdev
, struct nvme_rdma_qe
*qe
,
178 size_t capsule_size
, enum dma_data_direction dir
)
180 qe
->data
= kzalloc(capsule_size
, GFP_KERNEL
);
184 qe
->dma
= ib_dma_map_single(ibdev
, qe
->data
, capsule_size
, dir
);
185 if (ib_dma_mapping_error(ibdev
, qe
->dma
)) {
194 static void nvme_rdma_free_ring(struct ib_device
*ibdev
,
195 struct nvme_rdma_qe
*ring
, size_t ib_queue_size
,
196 size_t capsule_size
, enum dma_data_direction dir
)
200 for (i
= 0; i
< ib_queue_size
; i
++)
201 nvme_rdma_free_qe(ibdev
, &ring
[i
], capsule_size
, dir
);
205 static struct nvme_rdma_qe
*nvme_rdma_alloc_ring(struct ib_device
*ibdev
,
206 size_t ib_queue_size
, size_t capsule_size
,
207 enum dma_data_direction dir
)
209 struct nvme_rdma_qe
*ring
;
212 ring
= kcalloc(ib_queue_size
, sizeof(struct nvme_rdma_qe
), GFP_KERNEL
);
216 for (i
= 0; i
< ib_queue_size
; i
++) {
217 if (nvme_rdma_alloc_qe(ibdev
, &ring
[i
], capsule_size
, dir
))
224 nvme_rdma_free_ring(ibdev
, ring
, i
, capsule_size
, dir
);
228 static void nvme_rdma_qp_event(struct ib_event
*event
, void *context
)
230 pr_debug("QP event %s (%d)\n",
231 ib_event_msg(event
->event
), event
->event
);
235 static int nvme_rdma_wait_for_cm(struct nvme_rdma_queue
*queue
)
239 ret
= wait_for_completion_interruptible_timeout(&queue
->cm_done
,
240 msecs_to_jiffies(NVME_RDMA_CONNECT_TIMEOUT_MS
) + 1);
245 WARN_ON_ONCE(queue
->cm_error
> 0);
246 return queue
->cm_error
;
249 static int nvme_rdma_create_qp(struct nvme_rdma_queue
*queue
, const int factor
)
251 struct nvme_rdma_device
*dev
= queue
->device
;
252 struct ib_qp_init_attr init_attr
;
255 memset(&init_attr
, 0, sizeof(init_attr
));
256 init_attr
.event_handler
= nvme_rdma_qp_event
;
258 init_attr
.cap
.max_send_wr
= factor
* queue
->queue_size
+ 1;
260 init_attr
.cap
.max_recv_wr
= queue
->queue_size
+ 1;
261 init_attr
.cap
.max_recv_sge
= 1;
262 init_attr
.cap
.max_send_sge
= 1 + dev
->num_inline_segments
;
263 init_attr
.sq_sig_type
= IB_SIGNAL_REQ_WR
;
264 init_attr
.qp_type
= IB_QPT_RC
;
265 init_attr
.send_cq
= queue
->ib_cq
;
266 init_attr
.recv_cq
= queue
->ib_cq
;
268 ret
= rdma_create_qp(queue
->cm_id
, dev
->pd
, &init_attr
);
270 queue
->qp
= queue
->cm_id
->qp
;
274 static void nvme_rdma_exit_request(struct blk_mq_tag_set
*set
,
275 struct request
*rq
, unsigned int hctx_idx
)
277 struct nvme_rdma_ctrl
*ctrl
= set
->driver_data
;
278 struct nvme_rdma_request
*req
= blk_mq_rq_to_pdu(rq
);
279 int queue_idx
= (set
== &ctrl
->tag_set
) ? hctx_idx
+ 1 : 0;
280 struct nvme_rdma_queue
*queue
= &ctrl
->queues
[queue_idx
];
281 struct nvme_rdma_device
*dev
= queue
->device
;
283 nvme_rdma_free_qe(dev
->dev
, &req
->sqe
, sizeof(struct nvme_command
),
287 static int nvme_rdma_init_request(struct blk_mq_tag_set
*set
,
288 struct request
*rq
, unsigned int hctx_idx
,
289 unsigned int numa_node
)
291 struct nvme_rdma_ctrl
*ctrl
= set
->driver_data
;
292 struct nvme_rdma_request
*req
= blk_mq_rq_to_pdu(rq
);
293 int queue_idx
= (set
== &ctrl
->tag_set
) ? hctx_idx
+ 1 : 0;
294 struct nvme_rdma_queue
*queue
= &ctrl
->queues
[queue_idx
];
295 struct nvme_rdma_device
*dev
= queue
->device
;
296 struct ib_device
*ibdev
= dev
->dev
;
299 nvme_req(rq
)->ctrl
= &ctrl
->ctrl
;
300 ret
= nvme_rdma_alloc_qe(ibdev
, &req
->sqe
, sizeof(struct nvme_command
),
310 static int nvme_rdma_init_hctx(struct blk_mq_hw_ctx
*hctx
, void *data
,
311 unsigned int hctx_idx
)
313 struct nvme_rdma_ctrl
*ctrl
= data
;
314 struct nvme_rdma_queue
*queue
= &ctrl
->queues
[hctx_idx
+ 1];
316 BUG_ON(hctx_idx
>= ctrl
->ctrl
.queue_count
);
318 hctx
->driver_data
= queue
;
322 static int nvme_rdma_init_admin_hctx(struct blk_mq_hw_ctx
*hctx
, void *data
,
323 unsigned int hctx_idx
)
325 struct nvme_rdma_ctrl
*ctrl
= data
;
326 struct nvme_rdma_queue
*queue
= &ctrl
->queues
[0];
328 BUG_ON(hctx_idx
!= 0);
330 hctx
->driver_data
= queue
;
334 static void nvme_rdma_free_dev(struct kref
*ref
)
336 struct nvme_rdma_device
*ndev
=
337 container_of(ref
, struct nvme_rdma_device
, ref
);
339 mutex_lock(&device_list_mutex
);
340 list_del(&ndev
->entry
);
341 mutex_unlock(&device_list_mutex
);
343 ib_dealloc_pd(ndev
->pd
);
347 static void nvme_rdma_dev_put(struct nvme_rdma_device
*dev
)
349 kref_put(&dev
->ref
, nvme_rdma_free_dev
);
352 static int nvme_rdma_dev_get(struct nvme_rdma_device
*dev
)
354 return kref_get_unless_zero(&dev
->ref
);
357 static struct nvme_rdma_device
*
358 nvme_rdma_find_get_device(struct rdma_cm_id
*cm_id
)
360 struct nvme_rdma_device
*ndev
;
362 mutex_lock(&device_list_mutex
);
363 list_for_each_entry(ndev
, &device_list
, entry
) {
364 if (ndev
->dev
->node_guid
== cm_id
->device
->node_guid
&&
365 nvme_rdma_dev_get(ndev
))
369 ndev
= kzalloc(sizeof(*ndev
), GFP_KERNEL
);
373 ndev
->dev
= cm_id
->device
;
374 kref_init(&ndev
->ref
);
376 ndev
->pd
= ib_alloc_pd(ndev
->dev
,
377 register_always
? 0 : IB_PD_UNSAFE_GLOBAL_RKEY
);
378 if (IS_ERR(ndev
->pd
))
381 if (!(ndev
->dev
->attrs
.device_cap_flags
&
382 IB_DEVICE_MEM_MGT_EXTENSIONS
)) {
383 dev_err(&ndev
->dev
->dev
,
384 "Memory registrations not supported.\n");
388 ndev
->num_inline_segments
= min(NVME_RDMA_MAX_INLINE_SEGMENTS
,
389 ndev
->dev
->attrs
.max_send_sge
- 1);
390 list_add(&ndev
->entry
, &device_list
);
392 mutex_unlock(&device_list_mutex
);
396 ib_dealloc_pd(ndev
->pd
);
400 mutex_unlock(&device_list_mutex
);
404 static void nvme_rdma_destroy_queue_ib(struct nvme_rdma_queue
*queue
)
406 struct nvme_rdma_device
*dev
;
407 struct ib_device
*ibdev
;
409 if (!test_and_clear_bit(NVME_RDMA_Q_TR_READY
, &queue
->flags
))
415 ib_mr_pool_destroy(queue
->qp
, &queue
->qp
->rdma_mrs
);
418 * The cm_id object might have been destroyed during RDMA connection
419 * establishment error flow to avoid getting other cma events, thus
420 * the destruction of the QP shouldn't use rdma_cm API.
422 ib_destroy_qp(queue
->qp
);
423 ib_free_cq(queue
->ib_cq
);
425 nvme_rdma_free_ring(ibdev
, queue
->rsp_ring
, queue
->queue_size
,
426 sizeof(struct nvme_completion
), DMA_FROM_DEVICE
);
428 nvme_rdma_dev_put(dev
);
431 static int nvme_rdma_get_max_fr_pages(struct ib_device
*ibdev
)
433 return min_t(u32
, NVME_RDMA_MAX_SEGMENTS
,
434 ibdev
->attrs
.max_fast_reg_page_list_len
);
437 static int nvme_rdma_create_queue_ib(struct nvme_rdma_queue
*queue
)
439 struct ib_device
*ibdev
;
440 const int send_wr_factor
= 3; /* MR, SEND, INV */
441 const int cq_factor
= send_wr_factor
+ 1; /* + RECV */
442 int comp_vector
, idx
= nvme_rdma_queue_idx(queue
);
443 enum ib_poll_context poll_ctx
;
446 queue
->device
= nvme_rdma_find_get_device(queue
->cm_id
);
447 if (!queue
->device
) {
448 dev_err(queue
->cm_id
->device
->dev
.parent
,
449 "no client data found!\n");
450 return -ECONNREFUSED
;
452 ibdev
= queue
->device
->dev
;
455 * Spread I/O queues completion vectors according their queue index.
456 * Admin queues can always go on completion vector 0.
458 comp_vector
= idx
== 0 ? idx
: idx
- 1;
460 /* Polling queues need direct cq polling context */
461 if (nvme_rdma_poll_queue(queue
))
462 poll_ctx
= IB_POLL_DIRECT
;
464 poll_ctx
= IB_POLL_SOFTIRQ
;
466 /* +1 for ib_stop_cq */
467 queue
->ib_cq
= ib_alloc_cq(ibdev
, queue
,
468 cq_factor
* queue
->queue_size
+ 1,
469 comp_vector
, poll_ctx
);
470 if (IS_ERR(queue
->ib_cq
)) {
471 ret
= PTR_ERR(queue
->ib_cq
);
475 ret
= nvme_rdma_create_qp(queue
, send_wr_factor
);
477 goto out_destroy_ib_cq
;
479 queue
->rsp_ring
= nvme_rdma_alloc_ring(ibdev
, queue
->queue_size
,
480 sizeof(struct nvme_completion
), DMA_FROM_DEVICE
);
481 if (!queue
->rsp_ring
) {
486 ret
= ib_mr_pool_init(queue
->qp
, &queue
->qp
->rdma_mrs
,
489 nvme_rdma_get_max_fr_pages(ibdev
));
491 dev_err(queue
->ctrl
->ctrl
.device
,
492 "failed to initialize MR pool sized %d for QID %d\n",
493 queue
->queue_size
, idx
);
494 goto out_destroy_ring
;
497 set_bit(NVME_RDMA_Q_TR_READY
, &queue
->flags
);
502 nvme_rdma_free_ring(ibdev
, queue
->rsp_ring
, queue
->queue_size
,
503 sizeof(struct nvme_completion
), DMA_FROM_DEVICE
);
505 rdma_destroy_qp(queue
->cm_id
);
507 ib_free_cq(queue
->ib_cq
);
509 nvme_rdma_dev_put(queue
->device
);
513 static int nvme_rdma_alloc_queue(struct nvme_rdma_ctrl
*ctrl
,
514 int idx
, size_t queue_size
)
516 struct nvme_rdma_queue
*queue
;
517 struct sockaddr
*src_addr
= NULL
;
520 queue
= &ctrl
->queues
[idx
];
522 init_completion(&queue
->cm_done
);
525 queue
->cmnd_capsule_len
= ctrl
->ctrl
.ioccsz
* 16;
527 queue
->cmnd_capsule_len
= sizeof(struct nvme_command
);
529 queue
->queue_size
= queue_size
;
531 queue
->cm_id
= rdma_create_id(&init_net
, nvme_rdma_cm_handler
, queue
,
532 RDMA_PS_TCP
, IB_QPT_RC
);
533 if (IS_ERR(queue
->cm_id
)) {
534 dev_info(ctrl
->ctrl
.device
,
535 "failed to create CM ID: %ld\n", PTR_ERR(queue
->cm_id
));
536 return PTR_ERR(queue
->cm_id
);
539 if (ctrl
->ctrl
.opts
->mask
& NVMF_OPT_HOST_TRADDR
)
540 src_addr
= (struct sockaddr
*)&ctrl
->src_addr
;
542 queue
->cm_error
= -ETIMEDOUT
;
543 ret
= rdma_resolve_addr(queue
->cm_id
, src_addr
,
544 (struct sockaddr
*)&ctrl
->addr
,
545 NVME_RDMA_CONNECT_TIMEOUT_MS
);
547 dev_info(ctrl
->ctrl
.device
,
548 "rdma_resolve_addr failed (%d).\n", ret
);
549 goto out_destroy_cm_id
;
552 ret
= nvme_rdma_wait_for_cm(queue
);
554 dev_info(ctrl
->ctrl
.device
,
555 "rdma connection establishment failed (%d)\n", ret
);
556 goto out_destroy_cm_id
;
559 set_bit(NVME_RDMA_Q_ALLOCATED
, &queue
->flags
);
564 rdma_destroy_id(queue
->cm_id
);
565 nvme_rdma_destroy_queue_ib(queue
);
569 static void nvme_rdma_stop_queue(struct nvme_rdma_queue
*queue
)
571 if (!test_and_clear_bit(NVME_RDMA_Q_LIVE
, &queue
->flags
))
574 rdma_disconnect(queue
->cm_id
);
575 ib_drain_qp(queue
->qp
);
578 static void nvme_rdma_free_queue(struct nvme_rdma_queue
*queue
)
580 if (!test_and_clear_bit(NVME_RDMA_Q_ALLOCATED
, &queue
->flags
))
583 nvme_rdma_destroy_queue_ib(queue
);
584 rdma_destroy_id(queue
->cm_id
);
587 static void nvme_rdma_free_io_queues(struct nvme_rdma_ctrl
*ctrl
)
591 for (i
= 1; i
< ctrl
->ctrl
.queue_count
; i
++)
592 nvme_rdma_free_queue(&ctrl
->queues
[i
]);
595 static void nvme_rdma_stop_io_queues(struct nvme_rdma_ctrl
*ctrl
)
599 for (i
= 1; i
< ctrl
->ctrl
.queue_count
; i
++)
600 nvme_rdma_stop_queue(&ctrl
->queues
[i
]);
603 static int nvme_rdma_start_queue(struct nvme_rdma_ctrl
*ctrl
, int idx
)
605 struct nvme_rdma_queue
*queue
= &ctrl
->queues
[idx
];
606 bool poll
= nvme_rdma_poll_queue(queue
);
610 ret
= nvmf_connect_io_queue(&ctrl
->ctrl
, idx
, poll
);
612 ret
= nvmf_connect_admin_queue(&ctrl
->ctrl
);
615 set_bit(NVME_RDMA_Q_LIVE
, &queue
->flags
);
617 dev_info(ctrl
->ctrl
.device
,
618 "failed to connect queue: %d ret=%d\n", idx
, ret
);
622 static int nvme_rdma_start_io_queues(struct nvme_rdma_ctrl
*ctrl
)
626 for (i
= 1; i
< ctrl
->ctrl
.queue_count
; i
++) {
627 ret
= nvme_rdma_start_queue(ctrl
, i
);
629 goto out_stop_queues
;
635 for (i
--; i
>= 1; i
--)
636 nvme_rdma_stop_queue(&ctrl
->queues
[i
]);
640 static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl
*ctrl
)
642 struct nvmf_ctrl_options
*opts
= ctrl
->ctrl
.opts
;
643 struct ib_device
*ibdev
= ctrl
->device
->dev
;
644 unsigned int nr_io_queues
;
647 nr_io_queues
= min(opts
->nr_io_queues
, num_online_cpus());
650 * we map queues according to the device irq vectors for
651 * optimal locality so we don't need more queues than
652 * completion vectors.
654 nr_io_queues
= min_t(unsigned int, nr_io_queues
,
655 ibdev
->num_comp_vectors
);
657 if (opts
->nr_write_queues
) {
658 ctrl
->io_queues
[HCTX_TYPE_DEFAULT
] =
659 min(opts
->nr_write_queues
, nr_io_queues
);
660 nr_io_queues
+= ctrl
->io_queues
[HCTX_TYPE_DEFAULT
];
662 ctrl
->io_queues
[HCTX_TYPE_DEFAULT
] = nr_io_queues
;
665 ctrl
->io_queues
[HCTX_TYPE_READ
] = nr_io_queues
;
667 if (opts
->nr_poll_queues
) {
668 ctrl
->io_queues
[HCTX_TYPE_POLL
] =
669 min(opts
->nr_poll_queues
, num_online_cpus());
670 nr_io_queues
+= ctrl
->io_queues
[HCTX_TYPE_POLL
];
673 ret
= nvme_set_queue_count(&ctrl
->ctrl
, &nr_io_queues
);
677 ctrl
->ctrl
.queue_count
= nr_io_queues
+ 1;
678 if (ctrl
->ctrl
.queue_count
< 2)
681 dev_info(ctrl
->ctrl
.device
,
682 "creating %d I/O queues.\n", nr_io_queues
);
684 for (i
= 1; i
< ctrl
->ctrl
.queue_count
; i
++) {
685 ret
= nvme_rdma_alloc_queue(ctrl
, i
,
686 ctrl
->ctrl
.sqsize
+ 1);
688 goto out_free_queues
;
694 for (i
--; i
>= 1; i
--)
695 nvme_rdma_free_queue(&ctrl
->queues
[i
]);
700 static void nvme_rdma_free_tagset(struct nvme_ctrl
*nctrl
,
701 struct blk_mq_tag_set
*set
)
703 struct nvme_rdma_ctrl
*ctrl
= to_rdma_ctrl(nctrl
);
705 blk_mq_free_tag_set(set
);
706 nvme_rdma_dev_put(ctrl
->device
);
709 static struct blk_mq_tag_set
*nvme_rdma_alloc_tagset(struct nvme_ctrl
*nctrl
,
712 struct nvme_rdma_ctrl
*ctrl
= to_rdma_ctrl(nctrl
);
713 struct blk_mq_tag_set
*set
;
717 set
= &ctrl
->admin_tag_set
;
718 memset(set
, 0, sizeof(*set
));
719 set
->ops
= &nvme_rdma_admin_mq_ops
;
720 set
->queue_depth
= NVME_AQ_MQ_TAG_DEPTH
;
721 set
->reserved_tags
= 2; /* connect + keep-alive */
722 set
->numa_node
= nctrl
->numa_node
;
723 set
->cmd_size
= sizeof(struct nvme_rdma_request
) +
724 SG_CHUNK_SIZE
* sizeof(struct scatterlist
);
725 set
->driver_data
= ctrl
;
726 set
->nr_hw_queues
= 1;
727 set
->timeout
= ADMIN_TIMEOUT
;
728 set
->flags
= BLK_MQ_F_NO_SCHED
;
730 set
= &ctrl
->tag_set
;
731 memset(set
, 0, sizeof(*set
));
732 set
->ops
= &nvme_rdma_mq_ops
;
733 set
->queue_depth
= nctrl
->sqsize
+ 1;
734 set
->reserved_tags
= 1; /* fabric connect */
735 set
->numa_node
= nctrl
->numa_node
;
736 set
->flags
= BLK_MQ_F_SHOULD_MERGE
;
737 set
->cmd_size
= sizeof(struct nvme_rdma_request
) +
738 SG_CHUNK_SIZE
* sizeof(struct scatterlist
);
739 set
->driver_data
= ctrl
;
740 set
->nr_hw_queues
= nctrl
->queue_count
- 1;
741 set
->timeout
= NVME_IO_TIMEOUT
;
742 set
->nr_maps
= nctrl
->opts
->nr_poll_queues
? HCTX_MAX_TYPES
: 2;
745 ret
= blk_mq_alloc_tag_set(set
);
750 * We need a reference on the device as long as the tag_set is alive,
751 * as the MRs in the request structures need a valid ib_device.
753 ret
= nvme_rdma_dev_get(ctrl
->device
);
756 goto out_free_tagset
;
762 blk_mq_free_tag_set(set
);
767 static void nvme_rdma_destroy_admin_queue(struct nvme_rdma_ctrl
*ctrl
,
771 blk_cleanup_queue(ctrl
->ctrl
.admin_q
);
772 nvme_rdma_free_tagset(&ctrl
->ctrl
, ctrl
->ctrl
.admin_tagset
);
774 if (ctrl
->async_event_sqe
.data
) {
775 nvme_rdma_free_qe(ctrl
->device
->dev
, &ctrl
->async_event_sqe
,
776 sizeof(struct nvme_command
), DMA_TO_DEVICE
);
777 ctrl
->async_event_sqe
.data
= NULL
;
779 nvme_rdma_free_queue(&ctrl
->queues
[0]);
782 static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl
*ctrl
,
787 error
= nvme_rdma_alloc_queue(ctrl
, 0, NVME_AQ_DEPTH
);
791 ctrl
->device
= ctrl
->queues
[0].device
;
792 ctrl
->ctrl
.numa_node
= dev_to_node(ctrl
->device
->dev
->dma_device
);
794 ctrl
->max_fr_pages
= nvme_rdma_get_max_fr_pages(ctrl
->device
->dev
);
796 error
= nvme_rdma_alloc_qe(ctrl
->device
->dev
, &ctrl
->async_event_sqe
,
797 sizeof(struct nvme_command
), DMA_TO_DEVICE
);
802 ctrl
->ctrl
.admin_tagset
= nvme_rdma_alloc_tagset(&ctrl
->ctrl
, true);
803 if (IS_ERR(ctrl
->ctrl
.admin_tagset
)) {
804 error
= PTR_ERR(ctrl
->ctrl
.admin_tagset
);
805 goto out_free_async_qe
;
808 ctrl
->ctrl
.admin_q
= blk_mq_init_queue(&ctrl
->admin_tag_set
);
809 if (IS_ERR(ctrl
->ctrl
.admin_q
)) {
810 error
= PTR_ERR(ctrl
->ctrl
.admin_q
);
811 goto out_free_tagset
;
815 error
= nvme_rdma_start_queue(ctrl
, 0);
817 goto out_cleanup_queue
;
819 error
= ctrl
->ctrl
.ops
->reg_read64(&ctrl
->ctrl
, NVME_REG_CAP
,
822 dev_err(ctrl
->ctrl
.device
,
823 "prop_get NVME_REG_CAP failed\n");
828 min_t(int, NVME_CAP_MQES(ctrl
->ctrl
.cap
), ctrl
->ctrl
.sqsize
);
830 error
= nvme_enable_ctrl(&ctrl
->ctrl
, ctrl
->ctrl
.cap
);
834 ctrl
->ctrl
.max_hw_sectors
=
835 (ctrl
->max_fr_pages
- 1) << (ilog2(SZ_4K
) - 9);
837 error
= nvme_init_identify(&ctrl
->ctrl
);
844 nvme_rdma_stop_queue(&ctrl
->queues
[0]);
847 blk_cleanup_queue(ctrl
->ctrl
.admin_q
);
850 nvme_rdma_free_tagset(&ctrl
->ctrl
, ctrl
->ctrl
.admin_tagset
);
852 nvme_rdma_free_qe(ctrl
->device
->dev
, &ctrl
->async_event_sqe
,
853 sizeof(struct nvme_command
), DMA_TO_DEVICE
);
854 ctrl
->async_event_sqe
.data
= NULL
;
856 nvme_rdma_free_queue(&ctrl
->queues
[0]);
860 static void nvme_rdma_destroy_io_queues(struct nvme_rdma_ctrl
*ctrl
,
864 blk_cleanup_queue(ctrl
->ctrl
.connect_q
);
865 nvme_rdma_free_tagset(&ctrl
->ctrl
, ctrl
->ctrl
.tagset
);
867 nvme_rdma_free_io_queues(ctrl
);
870 static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl
*ctrl
, bool new)
874 ret
= nvme_rdma_alloc_io_queues(ctrl
);
879 ctrl
->ctrl
.tagset
= nvme_rdma_alloc_tagset(&ctrl
->ctrl
, false);
880 if (IS_ERR(ctrl
->ctrl
.tagset
)) {
881 ret
= PTR_ERR(ctrl
->ctrl
.tagset
);
882 goto out_free_io_queues
;
885 ctrl
->ctrl
.connect_q
= blk_mq_init_queue(&ctrl
->tag_set
);
886 if (IS_ERR(ctrl
->ctrl
.connect_q
)) {
887 ret
= PTR_ERR(ctrl
->ctrl
.connect_q
);
888 goto out_free_tag_set
;
891 blk_mq_update_nr_hw_queues(&ctrl
->tag_set
,
892 ctrl
->ctrl
.queue_count
- 1);
895 ret
= nvme_rdma_start_io_queues(ctrl
);
897 goto out_cleanup_connect_q
;
901 out_cleanup_connect_q
:
903 blk_cleanup_queue(ctrl
->ctrl
.connect_q
);
906 nvme_rdma_free_tagset(&ctrl
->ctrl
, ctrl
->ctrl
.tagset
);
908 nvme_rdma_free_io_queues(ctrl
);
912 static void nvme_rdma_teardown_admin_queue(struct nvme_rdma_ctrl
*ctrl
,
915 blk_mq_quiesce_queue(ctrl
->ctrl
.admin_q
);
916 nvme_rdma_stop_queue(&ctrl
->queues
[0]);
917 if (ctrl
->ctrl
.admin_tagset
)
918 blk_mq_tagset_busy_iter(ctrl
->ctrl
.admin_tagset
,
919 nvme_cancel_request
, &ctrl
->ctrl
);
920 blk_mq_unquiesce_queue(ctrl
->ctrl
.admin_q
);
921 nvme_rdma_destroy_admin_queue(ctrl
, remove
);
924 static void nvme_rdma_teardown_io_queues(struct nvme_rdma_ctrl
*ctrl
,
927 if (ctrl
->ctrl
.queue_count
> 1) {
928 nvme_stop_queues(&ctrl
->ctrl
);
929 nvme_rdma_stop_io_queues(ctrl
);
930 if (ctrl
->ctrl
.tagset
)
931 blk_mq_tagset_busy_iter(ctrl
->ctrl
.tagset
,
932 nvme_cancel_request
, &ctrl
->ctrl
);
934 nvme_start_queues(&ctrl
->ctrl
);
935 nvme_rdma_destroy_io_queues(ctrl
, remove
);
939 static void nvme_rdma_free_ctrl(struct nvme_ctrl
*nctrl
)
941 struct nvme_rdma_ctrl
*ctrl
= to_rdma_ctrl(nctrl
);
943 if (list_empty(&ctrl
->list
))
946 mutex_lock(&nvme_rdma_ctrl_mutex
);
947 list_del(&ctrl
->list
);
948 mutex_unlock(&nvme_rdma_ctrl_mutex
);
950 nvmf_free_options(nctrl
->opts
);
956 static void nvme_rdma_reconnect_or_remove(struct nvme_rdma_ctrl
*ctrl
)
958 /* If we are resetting/deleting then do nothing */
959 if (ctrl
->ctrl
.state
!= NVME_CTRL_CONNECTING
) {
960 WARN_ON_ONCE(ctrl
->ctrl
.state
== NVME_CTRL_NEW
||
961 ctrl
->ctrl
.state
== NVME_CTRL_LIVE
);
965 if (nvmf_should_reconnect(&ctrl
->ctrl
)) {
966 dev_info(ctrl
->ctrl
.device
, "Reconnecting in %d seconds...\n",
967 ctrl
->ctrl
.opts
->reconnect_delay
);
968 queue_delayed_work(nvme_wq
, &ctrl
->reconnect_work
,
969 ctrl
->ctrl
.opts
->reconnect_delay
* HZ
);
971 nvme_delete_ctrl(&ctrl
->ctrl
);
975 static int nvme_rdma_setup_ctrl(struct nvme_rdma_ctrl
*ctrl
, bool new)
980 ret
= nvme_rdma_configure_admin_queue(ctrl
, new);
984 if (ctrl
->ctrl
.icdoff
) {
985 dev_err(ctrl
->ctrl
.device
, "icdoff is not supported!\n");
989 if (!(ctrl
->ctrl
.sgls
& (1 << 2))) {
990 dev_err(ctrl
->ctrl
.device
,
991 "Mandatory keyed sgls are not supported!\n");
995 if (ctrl
->ctrl
.opts
->queue_size
> ctrl
->ctrl
.sqsize
+ 1) {
996 dev_warn(ctrl
->ctrl
.device
,
997 "queue_size %zu > ctrl sqsize %u, clamping down\n",
998 ctrl
->ctrl
.opts
->queue_size
, ctrl
->ctrl
.sqsize
+ 1);
1001 if (ctrl
->ctrl
.sqsize
+ 1 > ctrl
->ctrl
.maxcmd
) {
1002 dev_warn(ctrl
->ctrl
.device
,
1003 "sqsize %u > ctrl maxcmd %u, clamping down\n",
1004 ctrl
->ctrl
.sqsize
+ 1, ctrl
->ctrl
.maxcmd
);
1005 ctrl
->ctrl
.sqsize
= ctrl
->ctrl
.maxcmd
- 1;
1008 if (ctrl
->ctrl
.sgls
& (1 << 20))
1009 ctrl
->use_inline_data
= true;
1011 if (ctrl
->ctrl
.queue_count
> 1) {
1012 ret
= nvme_rdma_configure_io_queues(ctrl
, new);
1017 changed
= nvme_change_ctrl_state(&ctrl
->ctrl
, NVME_CTRL_LIVE
);
1019 /* state change failure is ok if we're in DELETING state */
1020 WARN_ON_ONCE(ctrl
->ctrl
.state
!= NVME_CTRL_DELETING
);
1025 nvme_start_ctrl(&ctrl
->ctrl
);
1029 if (ctrl
->ctrl
.queue_count
> 1)
1030 nvme_rdma_destroy_io_queues(ctrl
, new);
1032 nvme_rdma_stop_queue(&ctrl
->queues
[0]);
1033 nvme_rdma_destroy_admin_queue(ctrl
, new);
1037 static void nvme_rdma_reconnect_ctrl_work(struct work_struct
*work
)
1039 struct nvme_rdma_ctrl
*ctrl
= container_of(to_delayed_work(work
),
1040 struct nvme_rdma_ctrl
, reconnect_work
);
1042 ++ctrl
->ctrl
.nr_reconnects
;
1044 if (nvme_rdma_setup_ctrl(ctrl
, false))
1047 dev_info(ctrl
->ctrl
.device
, "Successfully reconnected (%d attempts)\n",
1048 ctrl
->ctrl
.nr_reconnects
);
1050 ctrl
->ctrl
.nr_reconnects
= 0;
1055 dev_info(ctrl
->ctrl
.device
, "Failed reconnect attempt %d\n",
1056 ctrl
->ctrl
.nr_reconnects
);
1057 nvme_rdma_reconnect_or_remove(ctrl
);
1060 static void nvme_rdma_error_recovery_work(struct work_struct
*work
)
1062 struct nvme_rdma_ctrl
*ctrl
= container_of(work
,
1063 struct nvme_rdma_ctrl
, err_work
);
1065 nvme_stop_keep_alive(&ctrl
->ctrl
);
1066 nvme_rdma_teardown_io_queues(ctrl
, false);
1067 nvme_start_queues(&ctrl
->ctrl
);
1068 nvme_rdma_teardown_admin_queue(ctrl
, false);
1070 if (!nvme_change_ctrl_state(&ctrl
->ctrl
, NVME_CTRL_CONNECTING
)) {
1071 /* state change failure is ok if we're in DELETING state */
1072 WARN_ON_ONCE(ctrl
->ctrl
.state
!= NVME_CTRL_DELETING
);
1076 nvme_rdma_reconnect_or_remove(ctrl
);
1079 static void nvme_rdma_error_recovery(struct nvme_rdma_ctrl
*ctrl
)
1081 if (!nvme_change_ctrl_state(&ctrl
->ctrl
, NVME_CTRL_RESETTING
))
1084 queue_work(nvme_wq
, &ctrl
->err_work
);
1087 static void nvme_rdma_wr_error(struct ib_cq
*cq
, struct ib_wc
*wc
,
1090 struct nvme_rdma_queue
*queue
= cq
->cq_context
;
1091 struct nvme_rdma_ctrl
*ctrl
= queue
->ctrl
;
1093 if (ctrl
->ctrl
.state
== NVME_CTRL_LIVE
)
1094 dev_info(ctrl
->ctrl
.device
,
1095 "%s for CQE 0x%p failed with status %s (%d)\n",
1097 ib_wc_status_msg(wc
->status
), wc
->status
);
1098 nvme_rdma_error_recovery(ctrl
);
1101 static void nvme_rdma_memreg_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1103 if (unlikely(wc
->status
!= IB_WC_SUCCESS
))
1104 nvme_rdma_wr_error(cq
, wc
, "MEMREG");
1107 static void nvme_rdma_inv_rkey_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1109 struct nvme_rdma_request
*req
=
1110 container_of(wc
->wr_cqe
, struct nvme_rdma_request
, reg_cqe
);
1111 struct request
*rq
= blk_mq_rq_from_pdu(req
);
1113 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1114 nvme_rdma_wr_error(cq
, wc
, "LOCAL_INV");
1118 if (refcount_dec_and_test(&req
->ref
))
1119 nvme_end_request(rq
, req
->status
, req
->result
);
1123 static int nvme_rdma_inv_rkey(struct nvme_rdma_queue
*queue
,
1124 struct nvme_rdma_request
*req
)
1126 struct ib_send_wr wr
= {
1127 .opcode
= IB_WR_LOCAL_INV
,
1130 .send_flags
= IB_SEND_SIGNALED
,
1131 .ex
.invalidate_rkey
= req
->mr
->rkey
,
1134 req
->reg_cqe
.done
= nvme_rdma_inv_rkey_done
;
1135 wr
.wr_cqe
= &req
->reg_cqe
;
1137 return ib_post_send(queue
->qp
, &wr
, NULL
);
1140 static void nvme_rdma_unmap_data(struct nvme_rdma_queue
*queue
,
1143 struct nvme_rdma_request
*req
= blk_mq_rq_to_pdu(rq
);
1144 struct nvme_rdma_device
*dev
= queue
->device
;
1145 struct ib_device
*ibdev
= dev
->dev
;
1147 if (!blk_rq_nr_phys_segments(rq
))
1151 ib_mr_pool_put(queue
->qp
, &queue
->qp
->rdma_mrs
, req
->mr
);
1155 ib_dma_unmap_sg(ibdev
, req
->sg_table
.sgl
,
1156 req
->nents
, rq_data_dir(rq
) ==
1157 WRITE
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
);
1159 nvme_cleanup_cmd(rq
);
1160 sg_free_table_chained(&req
->sg_table
, true);
1163 static int nvme_rdma_set_sg_null(struct nvme_command
*c
)
1165 struct nvme_keyed_sgl_desc
*sg
= &c
->common
.dptr
.ksgl
;
1168 put_unaligned_le24(0, sg
->length
);
1169 put_unaligned_le32(0, sg
->key
);
1170 sg
->type
= NVME_KEY_SGL_FMT_DATA_DESC
<< 4;
1174 static int nvme_rdma_map_sg_inline(struct nvme_rdma_queue
*queue
,
1175 struct nvme_rdma_request
*req
, struct nvme_command
*c
,
1178 struct nvme_sgl_desc
*sg
= &c
->common
.dptr
.sgl
;
1179 struct scatterlist
*sgl
= req
->sg_table
.sgl
;
1180 struct ib_sge
*sge
= &req
->sge
[1];
1184 for (i
= 0; i
< count
; i
++, sgl
++, sge
++) {
1185 sge
->addr
= sg_dma_address(sgl
);
1186 sge
->length
= sg_dma_len(sgl
);
1187 sge
->lkey
= queue
->device
->pd
->local_dma_lkey
;
1191 sg
->addr
= cpu_to_le64(queue
->ctrl
->ctrl
.icdoff
);
1192 sg
->length
= cpu_to_le32(len
);
1193 sg
->type
= (NVME_SGL_FMT_DATA_DESC
<< 4) | NVME_SGL_FMT_OFFSET
;
1195 req
->num_sge
+= count
;
1199 static int nvme_rdma_map_sg_single(struct nvme_rdma_queue
*queue
,
1200 struct nvme_rdma_request
*req
, struct nvme_command
*c
)
1202 struct nvme_keyed_sgl_desc
*sg
= &c
->common
.dptr
.ksgl
;
1204 sg
->addr
= cpu_to_le64(sg_dma_address(req
->sg_table
.sgl
));
1205 put_unaligned_le24(sg_dma_len(req
->sg_table
.sgl
), sg
->length
);
1206 put_unaligned_le32(queue
->device
->pd
->unsafe_global_rkey
, sg
->key
);
1207 sg
->type
= NVME_KEY_SGL_FMT_DATA_DESC
<< 4;
1211 static int nvme_rdma_map_sg_fr(struct nvme_rdma_queue
*queue
,
1212 struct nvme_rdma_request
*req
, struct nvme_command
*c
,
1215 struct nvme_keyed_sgl_desc
*sg
= &c
->common
.dptr
.ksgl
;
1218 req
->mr
= ib_mr_pool_get(queue
->qp
, &queue
->qp
->rdma_mrs
);
1219 if (WARN_ON_ONCE(!req
->mr
))
1223 * Align the MR to a 4K page size to match the ctrl page size and
1224 * the block virtual boundary.
1226 nr
= ib_map_mr_sg(req
->mr
, req
->sg_table
.sgl
, count
, NULL
, SZ_4K
);
1227 if (unlikely(nr
< count
)) {
1228 ib_mr_pool_put(queue
->qp
, &queue
->qp
->rdma_mrs
, req
->mr
);
1235 ib_update_fast_reg_key(req
->mr
, ib_inc_rkey(req
->mr
->rkey
));
1237 req
->reg_cqe
.done
= nvme_rdma_memreg_done
;
1238 memset(&req
->reg_wr
, 0, sizeof(req
->reg_wr
));
1239 req
->reg_wr
.wr
.opcode
= IB_WR_REG_MR
;
1240 req
->reg_wr
.wr
.wr_cqe
= &req
->reg_cqe
;
1241 req
->reg_wr
.wr
.num_sge
= 0;
1242 req
->reg_wr
.mr
= req
->mr
;
1243 req
->reg_wr
.key
= req
->mr
->rkey
;
1244 req
->reg_wr
.access
= IB_ACCESS_LOCAL_WRITE
|
1245 IB_ACCESS_REMOTE_READ
|
1246 IB_ACCESS_REMOTE_WRITE
;
1248 sg
->addr
= cpu_to_le64(req
->mr
->iova
);
1249 put_unaligned_le24(req
->mr
->length
, sg
->length
);
1250 put_unaligned_le32(req
->mr
->rkey
, sg
->key
);
1251 sg
->type
= (NVME_KEY_SGL_FMT_DATA_DESC
<< 4) |
1252 NVME_SGL_FMT_INVALIDATE
;
1257 static int nvme_rdma_map_data(struct nvme_rdma_queue
*queue
,
1258 struct request
*rq
, struct nvme_command
*c
)
1260 struct nvme_rdma_request
*req
= blk_mq_rq_to_pdu(rq
);
1261 struct nvme_rdma_device
*dev
= queue
->device
;
1262 struct ib_device
*ibdev
= dev
->dev
;
1266 refcount_set(&req
->ref
, 2); /* send and recv completions */
1268 c
->common
.flags
|= NVME_CMD_SGL_METABUF
;
1270 if (!blk_rq_nr_phys_segments(rq
))
1271 return nvme_rdma_set_sg_null(c
);
1273 req
->sg_table
.sgl
= req
->first_sgl
;
1274 ret
= sg_alloc_table_chained(&req
->sg_table
,
1275 blk_rq_nr_phys_segments(rq
), req
->sg_table
.sgl
);
1279 req
->nents
= blk_rq_map_sg(rq
->q
, rq
, req
->sg_table
.sgl
);
1281 count
= ib_dma_map_sg(ibdev
, req
->sg_table
.sgl
, req
->nents
,
1282 rq_data_dir(rq
) == WRITE
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
);
1283 if (unlikely(count
<= 0)) {
1285 goto out_free_table
;
1288 if (count
<= dev
->num_inline_segments
) {
1289 if (rq_data_dir(rq
) == WRITE
&& nvme_rdma_queue_idx(queue
) &&
1290 queue
->ctrl
->use_inline_data
&&
1291 blk_rq_payload_bytes(rq
) <=
1292 nvme_rdma_inline_data_size(queue
)) {
1293 ret
= nvme_rdma_map_sg_inline(queue
, req
, c
, count
);
1297 if (count
== 1 && dev
->pd
->flags
& IB_PD_UNSAFE_GLOBAL_RKEY
) {
1298 ret
= nvme_rdma_map_sg_single(queue
, req
, c
);
1303 ret
= nvme_rdma_map_sg_fr(queue
, req
, c
, count
);
1311 ib_dma_unmap_sg(ibdev
, req
->sg_table
.sgl
,
1312 req
->nents
, rq_data_dir(rq
) ==
1313 WRITE
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
);
1315 sg_free_table_chained(&req
->sg_table
, true);
1319 static void nvme_rdma_send_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1321 struct nvme_rdma_qe
*qe
=
1322 container_of(wc
->wr_cqe
, struct nvme_rdma_qe
, cqe
);
1323 struct nvme_rdma_request
*req
=
1324 container_of(qe
, struct nvme_rdma_request
, sqe
);
1325 struct request
*rq
= blk_mq_rq_from_pdu(req
);
1327 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1328 nvme_rdma_wr_error(cq
, wc
, "SEND");
1332 if (refcount_dec_and_test(&req
->ref
))
1333 nvme_end_request(rq
, req
->status
, req
->result
);
1336 static int nvme_rdma_post_send(struct nvme_rdma_queue
*queue
,
1337 struct nvme_rdma_qe
*qe
, struct ib_sge
*sge
, u32 num_sge
,
1338 struct ib_send_wr
*first
)
1340 struct ib_send_wr wr
;
1343 sge
->addr
= qe
->dma
;
1344 sge
->length
= sizeof(struct nvme_command
),
1345 sge
->lkey
= queue
->device
->pd
->local_dma_lkey
;
1348 wr
.wr_cqe
= &qe
->cqe
;
1350 wr
.num_sge
= num_sge
;
1351 wr
.opcode
= IB_WR_SEND
;
1352 wr
.send_flags
= IB_SEND_SIGNALED
;
1359 ret
= ib_post_send(queue
->qp
, first
, NULL
);
1360 if (unlikely(ret
)) {
1361 dev_err(queue
->ctrl
->ctrl
.device
,
1362 "%s failed with error code %d\n", __func__
, ret
);
1367 static int nvme_rdma_post_recv(struct nvme_rdma_queue
*queue
,
1368 struct nvme_rdma_qe
*qe
)
1370 struct ib_recv_wr wr
;
1374 list
.addr
= qe
->dma
;
1375 list
.length
= sizeof(struct nvme_completion
);
1376 list
.lkey
= queue
->device
->pd
->local_dma_lkey
;
1378 qe
->cqe
.done
= nvme_rdma_recv_done
;
1381 wr
.wr_cqe
= &qe
->cqe
;
1385 ret
= ib_post_recv(queue
->qp
, &wr
, NULL
);
1386 if (unlikely(ret
)) {
1387 dev_err(queue
->ctrl
->ctrl
.device
,
1388 "%s failed with error code %d\n", __func__
, ret
);
1393 static struct blk_mq_tags
*nvme_rdma_tagset(struct nvme_rdma_queue
*queue
)
1395 u32 queue_idx
= nvme_rdma_queue_idx(queue
);
1398 return queue
->ctrl
->admin_tag_set
.tags
[queue_idx
];
1399 return queue
->ctrl
->tag_set
.tags
[queue_idx
- 1];
1402 static void nvme_rdma_async_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1404 if (unlikely(wc
->status
!= IB_WC_SUCCESS
))
1405 nvme_rdma_wr_error(cq
, wc
, "ASYNC");
1408 static void nvme_rdma_submit_async_event(struct nvme_ctrl
*arg
)
1410 struct nvme_rdma_ctrl
*ctrl
= to_rdma_ctrl(arg
);
1411 struct nvme_rdma_queue
*queue
= &ctrl
->queues
[0];
1412 struct ib_device
*dev
= queue
->device
->dev
;
1413 struct nvme_rdma_qe
*sqe
= &ctrl
->async_event_sqe
;
1414 struct nvme_command
*cmd
= sqe
->data
;
1418 ib_dma_sync_single_for_cpu(dev
, sqe
->dma
, sizeof(*cmd
), DMA_TO_DEVICE
);
1420 memset(cmd
, 0, sizeof(*cmd
));
1421 cmd
->common
.opcode
= nvme_admin_async_event
;
1422 cmd
->common
.command_id
= NVME_AQ_BLK_MQ_DEPTH
;
1423 cmd
->common
.flags
|= NVME_CMD_SGL_METABUF
;
1424 nvme_rdma_set_sg_null(cmd
);
1426 sqe
->cqe
.done
= nvme_rdma_async_done
;
1428 ib_dma_sync_single_for_device(dev
, sqe
->dma
, sizeof(*cmd
),
1431 ret
= nvme_rdma_post_send(queue
, sqe
, &sge
, 1, NULL
);
1435 static void nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue
*queue
,
1436 struct nvme_completion
*cqe
, struct ib_wc
*wc
)
1439 struct nvme_rdma_request
*req
;
1441 rq
= blk_mq_tag_to_rq(nvme_rdma_tagset(queue
), cqe
->command_id
);
1443 dev_err(queue
->ctrl
->ctrl
.device
,
1444 "tag 0x%x on QP %#x not found\n",
1445 cqe
->command_id
, queue
->qp
->qp_num
);
1446 nvme_rdma_error_recovery(queue
->ctrl
);
1449 req
= blk_mq_rq_to_pdu(rq
);
1451 req
->status
= cqe
->status
;
1452 req
->result
= cqe
->result
;
1454 if (wc
->wc_flags
& IB_WC_WITH_INVALIDATE
) {
1455 if (unlikely(wc
->ex
.invalidate_rkey
!= req
->mr
->rkey
)) {
1456 dev_err(queue
->ctrl
->ctrl
.device
,
1457 "Bogus remote invalidation for rkey %#x\n",
1459 nvme_rdma_error_recovery(queue
->ctrl
);
1461 } else if (req
->mr
) {
1464 ret
= nvme_rdma_inv_rkey(queue
, req
);
1465 if (unlikely(ret
< 0)) {
1466 dev_err(queue
->ctrl
->ctrl
.device
,
1467 "Queueing INV WR for rkey %#x failed (%d)\n",
1468 req
->mr
->rkey
, ret
);
1469 nvme_rdma_error_recovery(queue
->ctrl
);
1471 /* the local invalidation completion will end the request */
1475 if (refcount_dec_and_test(&req
->ref
))
1476 nvme_end_request(rq
, req
->status
, req
->result
);
1479 static void nvme_rdma_recv_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1481 struct nvme_rdma_qe
*qe
=
1482 container_of(wc
->wr_cqe
, struct nvme_rdma_qe
, cqe
);
1483 struct nvme_rdma_queue
*queue
= cq
->cq_context
;
1484 struct ib_device
*ibdev
= queue
->device
->dev
;
1485 struct nvme_completion
*cqe
= qe
->data
;
1486 const size_t len
= sizeof(struct nvme_completion
);
1488 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1489 nvme_rdma_wr_error(cq
, wc
, "RECV");
1493 ib_dma_sync_single_for_cpu(ibdev
, qe
->dma
, len
, DMA_FROM_DEVICE
);
1495 * AEN requests are special as they don't time out and can
1496 * survive any kind of queue freeze and often don't respond to
1497 * aborts. We don't even bother to allocate a struct request
1498 * for them but rather special case them here.
1500 if (unlikely(nvme_rdma_queue_idx(queue
) == 0 &&
1501 cqe
->command_id
>= NVME_AQ_BLK_MQ_DEPTH
))
1502 nvme_complete_async_event(&queue
->ctrl
->ctrl
, cqe
->status
,
1505 nvme_rdma_process_nvme_rsp(queue
, cqe
, wc
);
1506 ib_dma_sync_single_for_device(ibdev
, qe
->dma
, len
, DMA_FROM_DEVICE
);
1508 nvme_rdma_post_recv(queue
, qe
);
1511 static int nvme_rdma_conn_established(struct nvme_rdma_queue
*queue
)
1515 for (i
= 0; i
< queue
->queue_size
; i
++) {
1516 ret
= nvme_rdma_post_recv(queue
, &queue
->rsp_ring
[i
]);
1518 goto out_destroy_queue_ib
;
1523 out_destroy_queue_ib
:
1524 nvme_rdma_destroy_queue_ib(queue
);
1528 static int nvme_rdma_conn_rejected(struct nvme_rdma_queue
*queue
,
1529 struct rdma_cm_event
*ev
)
1531 struct rdma_cm_id
*cm_id
= queue
->cm_id
;
1532 int status
= ev
->status
;
1533 const char *rej_msg
;
1534 const struct nvme_rdma_cm_rej
*rej_data
;
1537 rej_msg
= rdma_reject_msg(cm_id
, status
);
1538 rej_data
= rdma_consumer_reject_data(cm_id
, ev
, &rej_data_len
);
1540 if (rej_data
&& rej_data_len
>= sizeof(u16
)) {
1541 u16 sts
= le16_to_cpu(rej_data
->sts
);
1543 dev_err(queue
->ctrl
->ctrl
.device
,
1544 "Connect rejected: status %d (%s) nvme status %d (%s).\n",
1545 status
, rej_msg
, sts
, nvme_rdma_cm_msg(sts
));
1547 dev_err(queue
->ctrl
->ctrl
.device
,
1548 "Connect rejected: status %d (%s).\n", status
, rej_msg
);
1554 static int nvme_rdma_addr_resolved(struct nvme_rdma_queue
*queue
)
1558 ret
= nvme_rdma_create_queue_ib(queue
);
1562 ret
= rdma_resolve_route(queue
->cm_id
, NVME_RDMA_CONNECT_TIMEOUT_MS
);
1564 dev_err(queue
->ctrl
->ctrl
.device
,
1565 "rdma_resolve_route failed (%d).\n",
1567 goto out_destroy_queue
;
1573 nvme_rdma_destroy_queue_ib(queue
);
1577 static int nvme_rdma_route_resolved(struct nvme_rdma_queue
*queue
)
1579 struct nvme_rdma_ctrl
*ctrl
= queue
->ctrl
;
1580 struct rdma_conn_param param
= { };
1581 struct nvme_rdma_cm_req priv
= { };
1584 param
.qp_num
= queue
->qp
->qp_num
;
1585 param
.flow_control
= 1;
1587 param
.responder_resources
= queue
->device
->dev
->attrs
.max_qp_rd_atom
;
1588 /* maximum retry count */
1589 param
.retry_count
= 7;
1590 param
.rnr_retry_count
= 7;
1591 param
.private_data
= &priv
;
1592 param
.private_data_len
= sizeof(priv
);
1594 priv
.recfmt
= cpu_to_le16(NVME_RDMA_CM_FMT_1_0
);
1595 priv
.qid
= cpu_to_le16(nvme_rdma_queue_idx(queue
));
1597 * set the admin queue depth to the minimum size
1598 * specified by the Fabrics standard.
1600 if (priv
.qid
== 0) {
1601 priv
.hrqsize
= cpu_to_le16(NVME_AQ_DEPTH
);
1602 priv
.hsqsize
= cpu_to_le16(NVME_AQ_DEPTH
- 1);
1605 * current interpretation of the fabrics spec
1606 * is at minimum you make hrqsize sqsize+1, or a
1607 * 1's based representation of sqsize.
1609 priv
.hrqsize
= cpu_to_le16(queue
->queue_size
);
1610 priv
.hsqsize
= cpu_to_le16(queue
->ctrl
->ctrl
.sqsize
);
1613 ret
= rdma_connect(queue
->cm_id
, ¶m
);
1615 dev_err(ctrl
->ctrl
.device
,
1616 "rdma_connect failed (%d).\n", ret
);
1617 goto out_destroy_queue_ib
;
1622 out_destroy_queue_ib
:
1623 nvme_rdma_destroy_queue_ib(queue
);
1627 static int nvme_rdma_cm_handler(struct rdma_cm_id
*cm_id
,
1628 struct rdma_cm_event
*ev
)
1630 struct nvme_rdma_queue
*queue
= cm_id
->context
;
1633 dev_dbg(queue
->ctrl
->ctrl
.device
, "%s (%d): status %d id %p\n",
1634 rdma_event_msg(ev
->event
), ev
->event
,
1637 switch (ev
->event
) {
1638 case RDMA_CM_EVENT_ADDR_RESOLVED
:
1639 cm_error
= nvme_rdma_addr_resolved(queue
);
1641 case RDMA_CM_EVENT_ROUTE_RESOLVED
:
1642 cm_error
= nvme_rdma_route_resolved(queue
);
1644 case RDMA_CM_EVENT_ESTABLISHED
:
1645 queue
->cm_error
= nvme_rdma_conn_established(queue
);
1646 /* complete cm_done regardless of success/failure */
1647 complete(&queue
->cm_done
);
1649 case RDMA_CM_EVENT_REJECTED
:
1650 nvme_rdma_destroy_queue_ib(queue
);
1651 cm_error
= nvme_rdma_conn_rejected(queue
, ev
);
1653 case RDMA_CM_EVENT_ROUTE_ERROR
:
1654 case RDMA_CM_EVENT_CONNECT_ERROR
:
1655 case RDMA_CM_EVENT_UNREACHABLE
:
1656 nvme_rdma_destroy_queue_ib(queue
);
1658 case RDMA_CM_EVENT_ADDR_ERROR
:
1659 dev_dbg(queue
->ctrl
->ctrl
.device
,
1660 "CM error event %d\n", ev
->event
);
1661 cm_error
= -ECONNRESET
;
1663 case RDMA_CM_EVENT_DISCONNECTED
:
1664 case RDMA_CM_EVENT_ADDR_CHANGE
:
1665 case RDMA_CM_EVENT_TIMEWAIT_EXIT
:
1666 dev_dbg(queue
->ctrl
->ctrl
.device
,
1667 "disconnect received - connection closed\n");
1668 nvme_rdma_error_recovery(queue
->ctrl
);
1670 case RDMA_CM_EVENT_DEVICE_REMOVAL
:
1671 /* device removal is handled via the ib_client API */
1674 dev_err(queue
->ctrl
->ctrl
.device
,
1675 "Unexpected RDMA CM event (%d)\n", ev
->event
);
1676 nvme_rdma_error_recovery(queue
->ctrl
);
1681 queue
->cm_error
= cm_error
;
1682 complete(&queue
->cm_done
);
1688 static enum blk_eh_timer_return
1689 nvme_rdma_timeout(struct request
*rq
, bool reserved
)
1691 struct nvme_rdma_request
*req
= blk_mq_rq_to_pdu(rq
);
1692 struct nvme_rdma_queue
*queue
= req
->queue
;
1693 struct nvme_rdma_ctrl
*ctrl
= queue
->ctrl
;
1695 dev_warn(ctrl
->ctrl
.device
, "I/O %d QID %d timeout\n",
1696 rq
->tag
, nvme_rdma_queue_idx(queue
));
1698 if (ctrl
->ctrl
.state
!= NVME_CTRL_LIVE
) {
1700 * Teardown immediately if controller times out while starting
1701 * or we are already started error recovery. all outstanding
1702 * requests are completed on shutdown, so we return BLK_EH_DONE.
1704 flush_work(&ctrl
->err_work
);
1705 nvme_rdma_teardown_io_queues(ctrl
, false);
1706 nvme_rdma_teardown_admin_queue(ctrl
, false);
1710 dev_warn(ctrl
->ctrl
.device
, "starting error recovery\n");
1711 nvme_rdma_error_recovery(ctrl
);
1713 return BLK_EH_RESET_TIMER
;
1716 static blk_status_t
nvme_rdma_queue_rq(struct blk_mq_hw_ctx
*hctx
,
1717 const struct blk_mq_queue_data
*bd
)
1719 struct nvme_ns
*ns
= hctx
->queue
->queuedata
;
1720 struct nvme_rdma_queue
*queue
= hctx
->driver_data
;
1721 struct request
*rq
= bd
->rq
;
1722 struct nvme_rdma_request
*req
= blk_mq_rq_to_pdu(rq
);
1723 struct nvme_rdma_qe
*sqe
= &req
->sqe
;
1724 struct nvme_command
*c
= sqe
->data
;
1725 struct ib_device
*dev
;
1726 bool queue_ready
= test_bit(NVME_RDMA_Q_LIVE
, &queue
->flags
);
1730 WARN_ON_ONCE(rq
->tag
< 0);
1732 if (!nvmf_check_ready(&queue
->ctrl
->ctrl
, rq
, queue_ready
))
1733 return nvmf_fail_nonready_command(&queue
->ctrl
->ctrl
, rq
);
1735 dev
= queue
->device
->dev
;
1736 ib_dma_sync_single_for_cpu(dev
, sqe
->dma
,
1737 sizeof(struct nvme_command
), DMA_TO_DEVICE
);
1739 ret
= nvme_setup_cmd(ns
, rq
, c
);
1743 blk_mq_start_request(rq
);
1745 err
= nvme_rdma_map_data(queue
, rq
, c
);
1746 if (unlikely(err
< 0)) {
1747 dev_err(queue
->ctrl
->ctrl
.device
,
1748 "Failed to map data (%d)\n", err
);
1749 nvme_cleanup_cmd(rq
);
1753 sqe
->cqe
.done
= nvme_rdma_send_done
;
1755 ib_dma_sync_single_for_device(dev
, sqe
->dma
,
1756 sizeof(struct nvme_command
), DMA_TO_DEVICE
);
1758 err
= nvme_rdma_post_send(queue
, sqe
, req
->sge
, req
->num_sge
,
1759 req
->mr
? &req
->reg_wr
.wr
: NULL
);
1760 if (unlikely(err
)) {
1761 nvme_rdma_unmap_data(queue
, rq
);
1767 if (err
== -ENOMEM
|| err
== -EAGAIN
)
1768 return BLK_STS_RESOURCE
;
1769 return BLK_STS_IOERR
;
1772 static int nvme_rdma_poll(struct blk_mq_hw_ctx
*hctx
)
1774 struct nvme_rdma_queue
*queue
= hctx
->driver_data
;
1776 return ib_process_cq_direct(queue
->ib_cq
, -1);
1779 static void nvme_rdma_complete_rq(struct request
*rq
)
1781 struct nvme_rdma_request
*req
= blk_mq_rq_to_pdu(rq
);
1783 nvme_rdma_unmap_data(req
->queue
, rq
);
1784 nvme_complete_rq(rq
);
1787 static int nvme_rdma_map_queues(struct blk_mq_tag_set
*set
)
1789 struct nvme_rdma_ctrl
*ctrl
= set
->driver_data
;
1791 set
->map
[HCTX_TYPE_DEFAULT
].queue_offset
= 0;
1792 set
->map
[HCTX_TYPE_DEFAULT
].nr_queues
=
1793 ctrl
->io_queues
[HCTX_TYPE_DEFAULT
];
1794 set
->map
[HCTX_TYPE_READ
].nr_queues
= ctrl
->io_queues
[HCTX_TYPE_READ
];
1795 if (ctrl
->ctrl
.opts
->nr_write_queues
) {
1796 /* separate read/write queues */
1797 set
->map
[HCTX_TYPE_READ
].queue_offset
=
1798 ctrl
->io_queues
[HCTX_TYPE_DEFAULT
];
1800 /* mixed read/write queues */
1801 set
->map
[HCTX_TYPE_READ
].queue_offset
= 0;
1803 blk_mq_rdma_map_queues(&set
->map
[HCTX_TYPE_DEFAULT
],
1804 ctrl
->device
->dev
, 0);
1805 blk_mq_rdma_map_queues(&set
->map
[HCTX_TYPE_READ
],
1806 ctrl
->device
->dev
, 0);
1808 if (ctrl
->ctrl
.opts
->nr_poll_queues
) {
1809 set
->map
[HCTX_TYPE_POLL
].nr_queues
=
1810 ctrl
->io_queues
[HCTX_TYPE_POLL
];
1811 set
->map
[HCTX_TYPE_POLL
].queue_offset
=
1812 ctrl
->io_queues
[HCTX_TYPE_DEFAULT
];
1813 if (ctrl
->ctrl
.opts
->nr_write_queues
)
1814 set
->map
[HCTX_TYPE_POLL
].queue_offset
+=
1815 ctrl
->io_queues
[HCTX_TYPE_READ
];
1816 blk_mq_map_queues(&set
->map
[HCTX_TYPE_POLL
]);
1821 static const struct blk_mq_ops nvme_rdma_mq_ops
= {
1822 .queue_rq
= nvme_rdma_queue_rq
,
1823 .complete
= nvme_rdma_complete_rq
,
1824 .init_request
= nvme_rdma_init_request
,
1825 .exit_request
= nvme_rdma_exit_request
,
1826 .init_hctx
= nvme_rdma_init_hctx
,
1827 .timeout
= nvme_rdma_timeout
,
1828 .map_queues
= nvme_rdma_map_queues
,
1829 .poll
= nvme_rdma_poll
,
1832 static const struct blk_mq_ops nvme_rdma_admin_mq_ops
= {
1833 .queue_rq
= nvme_rdma_queue_rq
,
1834 .complete
= nvme_rdma_complete_rq
,
1835 .init_request
= nvme_rdma_init_request
,
1836 .exit_request
= nvme_rdma_exit_request
,
1837 .init_hctx
= nvme_rdma_init_admin_hctx
,
1838 .timeout
= nvme_rdma_timeout
,
1841 static void nvme_rdma_shutdown_ctrl(struct nvme_rdma_ctrl
*ctrl
, bool shutdown
)
1843 cancel_work_sync(&ctrl
->err_work
);
1844 cancel_delayed_work_sync(&ctrl
->reconnect_work
);
1846 nvme_rdma_teardown_io_queues(ctrl
, shutdown
);
1848 nvme_shutdown_ctrl(&ctrl
->ctrl
);
1850 nvme_disable_ctrl(&ctrl
->ctrl
, ctrl
->ctrl
.cap
);
1851 nvme_rdma_teardown_admin_queue(ctrl
, shutdown
);
1854 static void nvme_rdma_delete_ctrl(struct nvme_ctrl
*ctrl
)
1856 nvme_rdma_shutdown_ctrl(to_rdma_ctrl(ctrl
), true);
1859 static void nvme_rdma_reset_ctrl_work(struct work_struct
*work
)
1861 struct nvme_rdma_ctrl
*ctrl
=
1862 container_of(work
, struct nvme_rdma_ctrl
, ctrl
.reset_work
);
1864 nvme_stop_ctrl(&ctrl
->ctrl
);
1865 nvme_rdma_shutdown_ctrl(ctrl
, false);
1867 if (!nvme_change_ctrl_state(&ctrl
->ctrl
, NVME_CTRL_CONNECTING
)) {
1868 /* state change failure should never happen */
1873 if (nvme_rdma_setup_ctrl(ctrl
, false))
1879 ++ctrl
->ctrl
.nr_reconnects
;
1880 nvme_rdma_reconnect_or_remove(ctrl
);
1883 static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops
= {
1885 .module
= THIS_MODULE
,
1886 .flags
= NVME_F_FABRICS
,
1887 .reg_read32
= nvmf_reg_read32
,
1888 .reg_read64
= nvmf_reg_read64
,
1889 .reg_write32
= nvmf_reg_write32
,
1890 .free_ctrl
= nvme_rdma_free_ctrl
,
1891 .submit_async_event
= nvme_rdma_submit_async_event
,
1892 .delete_ctrl
= nvme_rdma_delete_ctrl
,
1893 .get_address
= nvmf_get_address
,
1897 * Fails a connection request if it matches an existing controller
1898 * (association) with the same tuple:
1899 * <Host NQN, Host ID, local address, remote address, remote port, SUBSYS NQN>
1901 * if local address is not specified in the request, it will match an
1902 * existing controller with all the other parameters the same and no
1903 * local port address specified as well.
1905 * The ports don't need to be compared as they are intrinsically
1906 * already matched by the port pointers supplied.
1909 nvme_rdma_existing_controller(struct nvmf_ctrl_options
*opts
)
1911 struct nvme_rdma_ctrl
*ctrl
;
1914 mutex_lock(&nvme_rdma_ctrl_mutex
);
1915 list_for_each_entry(ctrl
, &nvme_rdma_ctrl_list
, list
) {
1916 found
= nvmf_ip_options_match(&ctrl
->ctrl
, opts
);
1920 mutex_unlock(&nvme_rdma_ctrl_mutex
);
1925 static struct nvme_ctrl
*nvme_rdma_create_ctrl(struct device
*dev
,
1926 struct nvmf_ctrl_options
*opts
)
1928 struct nvme_rdma_ctrl
*ctrl
;
1932 ctrl
= kzalloc(sizeof(*ctrl
), GFP_KERNEL
);
1934 return ERR_PTR(-ENOMEM
);
1935 ctrl
->ctrl
.opts
= opts
;
1936 INIT_LIST_HEAD(&ctrl
->list
);
1938 if (!(opts
->mask
& NVMF_OPT_TRSVCID
)) {
1940 kstrdup(__stringify(NVME_RDMA_IP_PORT
), GFP_KERNEL
);
1941 if (!opts
->trsvcid
) {
1945 opts
->mask
|= NVMF_OPT_TRSVCID
;
1948 ret
= inet_pton_with_scope(&init_net
, AF_UNSPEC
,
1949 opts
->traddr
, opts
->trsvcid
, &ctrl
->addr
);
1951 pr_err("malformed address passed: %s:%s\n",
1952 opts
->traddr
, opts
->trsvcid
);
1956 if (opts
->mask
& NVMF_OPT_HOST_TRADDR
) {
1957 ret
= inet_pton_with_scope(&init_net
, AF_UNSPEC
,
1958 opts
->host_traddr
, NULL
, &ctrl
->src_addr
);
1960 pr_err("malformed src address passed: %s\n",
1966 if (!opts
->duplicate_connect
&& nvme_rdma_existing_controller(opts
)) {
1971 INIT_DELAYED_WORK(&ctrl
->reconnect_work
,
1972 nvme_rdma_reconnect_ctrl_work
);
1973 INIT_WORK(&ctrl
->err_work
, nvme_rdma_error_recovery_work
);
1974 INIT_WORK(&ctrl
->ctrl
.reset_work
, nvme_rdma_reset_ctrl_work
);
1976 ctrl
->ctrl
.queue_count
= opts
->nr_io_queues
+ opts
->nr_write_queues
+
1977 opts
->nr_poll_queues
+ 1;
1978 ctrl
->ctrl
.sqsize
= opts
->queue_size
- 1;
1979 ctrl
->ctrl
.kato
= opts
->kato
;
1982 ctrl
->queues
= kcalloc(ctrl
->ctrl
.queue_count
, sizeof(*ctrl
->queues
),
1987 ret
= nvme_init_ctrl(&ctrl
->ctrl
, dev
, &nvme_rdma_ctrl_ops
,
1988 0 /* no quirks, we're perfect! */);
1990 goto out_kfree_queues
;
1992 changed
= nvme_change_ctrl_state(&ctrl
->ctrl
, NVME_CTRL_CONNECTING
);
1993 WARN_ON_ONCE(!changed
);
1995 ret
= nvme_rdma_setup_ctrl(ctrl
, true);
1997 goto out_uninit_ctrl
;
1999 dev_info(ctrl
->ctrl
.device
, "new ctrl: NQN \"%s\", addr %pISpcs\n",
2000 ctrl
->ctrl
.opts
->subsysnqn
, &ctrl
->addr
);
2002 nvme_get_ctrl(&ctrl
->ctrl
);
2004 mutex_lock(&nvme_rdma_ctrl_mutex
);
2005 list_add_tail(&ctrl
->list
, &nvme_rdma_ctrl_list
);
2006 mutex_unlock(&nvme_rdma_ctrl_mutex
);
2011 nvme_uninit_ctrl(&ctrl
->ctrl
);
2012 nvme_put_ctrl(&ctrl
->ctrl
);
2015 return ERR_PTR(ret
);
2017 kfree(ctrl
->queues
);
2020 return ERR_PTR(ret
);
2023 static struct nvmf_transport_ops nvme_rdma_transport
= {
2025 .module
= THIS_MODULE
,
2026 .required_opts
= NVMF_OPT_TRADDR
,
2027 .allowed_opts
= NVMF_OPT_TRSVCID
| NVMF_OPT_RECONNECT_DELAY
|
2028 NVMF_OPT_HOST_TRADDR
| NVMF_OPT_CTRL_LOSS_TMO
|
2029 NVMF_OPT_NR_WRITE_QUEUES
| NVMF_OPT_NR_POLL_QUEUES
,
2030 .create_ctrl
= nvme_rdma_create_ctrl
,
2033 static void nvme_rdma_remove_one(struct ib_device
*ib_device
, void *client_data
)
2035 struct nvme_rdma_ctrl
*ctrl
;
2036 struct nvme_rdma_device
*ndev
;
2039 mutex_lock(&device_list_mutex
);
2040 list_for_each_entry(ndev
, &device_list
, entry
) {
2041 if (ndev
->dev
== ib_device
) {
2046 mutex_unlock(&device_list_mutex
);
2051 /* Delete all controllers using this device */
2052 mutex_lock(&nvme_rdma_ctrl_mutex
);
2053 list_for_each_entry(ctrl
, &nvme_rdma_ctrl_list
, list
) {
2054 if (ctrl
->device
->dev
!= ib_device
)
2056 nvme_delete_ctrl(&ctrl
->ctrl
);
2058 mutex_unlock(&nvme_rdma_ctrl_mutex
);
2060 flush_workqueue(nvme_delete_wq
);
2063 static struct ib_client nvme_rdma_ib_client
= {
2064 .name
= "nvme_rdma",
2065 .remove
= nvme_rdma_remove_one
2068 static int __init
nvme_rdma_init_module(void)
2072 ret
= ib_register_client(&nvme_rdma_ib_client
);
2076 ret
= nvmf_register_transport(&nvme_rdma_transport
);
2078 goto err_unreg_client
;
2083 ib_unregister_client(&nvme_rdma_ib_client
);
2087 static void __exit
nvme_rdma_cleanup_module(void)
2089 nvmf_unregister_transport(&nvme_rdma_transport
);
2090 ib_unregister_client(&nvme_rdma_ib_client
);
2093 module_init(nvme_rdma_init_module
);
2094 module_exit(nvme_rdma_cleanup_module
);
2096 MODULE_LICENSE("GPL v2");