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71102307 CH |
1 | /* |
2 | * NVMe over Fabrics RDMA host code. | |
3 | * Copyright (c) 2015-2016 HGST, a Western Digital Company. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
71102307 CH |
15 | #include <linux/module.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/string.h> | |
71102307 CH |
20 | #include <linux/atomic.h> |
21 | #include <linux/blk-mq.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/mutex.h> | |
25 | #include <linux/scatterlist.h> | |
26 | #include <linux/nvme.h> | |
71102307 CH |
27 | #include <asm/unaligned.h> |
28 | ||
29 | #include <rdma/ib_verbs.h> | |
30 | #include <rdma/rdma_cm.h> | |
71102307 CH |
31 | #include <linux/nvme-rdma.h> |
32 | ||
33 | #include "nvme.h" | |
34 | #include "fabrics.h" | |
35 | ||
36 | ||
37 | #define NVME_RDMA_CONNECT_TIMEOUT_MS 1000 /* 1 second */ | |
38 | ||
39 | #define NVME_RDMA_MAX_SEGMENT_SIZE 0xffffff /* 24-bit SGL field */ | |
40 | ||
41 | #define NVME_RDMA_MAX_SEGMENTS 256 | |
42 | ||
43 | #define NVME_RDMA_MAX_INLINE_SEGMENTS 1 | |
44 | ||
7f03953c SW |
45 | static const char *const nvme_rdma_cm_status_strs[] = { |
46 | [NVME_RDMA_CM_INVALID_LEN] = "invalid length", | |
47 | [NVME_RDMA_CM_INVALID_RECFMT] = "invalid record format", | |
48 | [NVME_RDMA_CM_INVALID_QID] = "invalid queue ID", | |
49 | [NVME_RDMA_CM_INVALID_HSQSIZE] = "invalid host SQ size", | |
50 | [NVME_RDMA_CM_INVALID_HRQSIZE] = "invalid host RQ size", | |
51 | [NVME_RDMA_CM_NO_RSC] = "resource not found", | |
52 | [NVME_RDMA_CM_INVALID_IRD] = "invalid IRD", | |
53 | [NVME_RDMA_CM_INVALID_ORD] = "Invalid ORD", | |
54 | }; | |
55 | ||
56 | static const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status) | |
57 | { | |
58 | size_t index = status; | |
59 | ||
60 | if (index < ARRAY_SIZE(nvme_rdma_cm_status_strs) && | |
61 | nvme_rdma_cm_status_strs[index]) | |
62 | return nvme_rdma_cm_status_strs[index]; | |
63 | else | |
64 | return "unrecognized reason"; | |
65 | }; | |
66 | ||
71102307 CH |
67 | /* |
68 | * We handle AEN commands ourselves and don't even let the | |
69 | * block layer know about them. | |
70 | */ | |
71 | #define NVME_RDMA_NR_AEN_COMMANDS 1 | |
72 | #define NVME_RDMA_AQ_BLKMQ_DEPTH \ | |
73 | (NVMF_AQ_DEPTH - NVME_RDMA_NR_AEN_COMMANDS) | |
74 | ||
75 | struct nvme_rdma_device { | |
76 | struct ib_device *dev; | |
77 | struct ib_pd *pd; | |
71102307 CH |
78 | struct kref ref; |
79 | struct list_head entry; | |
80 | }; | |
81 | ||
82 | struct nvme_rdma_qe { | |
83 | struct ib_cqe cqe; | |
84 | void *data; | |
85 | u64 dma; | |
86 | }; | |
87 | ||
88 | struct nvme_rdma_queue; | |
89 | struct nvme_rdma_request { | |
d49187e9 | 90 | struct nvme_request req; |
71102307 CH |
91 | struct ib_mr *mr; |
92 | struct nvme_rdma_qe sqe; | |
93 | struct ib_sge sge[1 + NVME_RDMA_MAX_INLINE_SEGMENTS]; | |
94 | u32 num_sge; | |
95 | int nents; | |
96 | bool inline_data; | |
71102307 CH |
97 | struct ib_reg_wr reg_wr; |
98 | struct ib_cqe reg_cqe; | |
99 | struct nvme_rdma_queue *queue; | |
100 | struct sg_table sg_table; | |
101 | struct scatterlist first_sgl[]; | |
102 | }; | |
103 | ||
104 | enum nvme_rdma_queue_flags { | |
105 | NVME_RDMA_Q_CONNECTED = (1 << 0), | |
f361e5a0 | 106 | NVME_RDMA_IB_QUEUE_ALLOCATED = (1 << 1), |
e89ca58f | 107 | NVME_RDMA_Q_DELETING = (1 << 2), |
553cd9ef | 108 | NVME_RDMA_Q_LIVE = (1 << 3), |
71102307 CH |
109 | }; |
110 | ||
111 | struct nvme_rdma_queue { | |
112 | struct nvme_rdma_qe *rsp_ring; | |
113 | u8 sig_count; | |
114 | int queue_size; | |
115 | size_t cmnd_capsule_len; | |
116 | struct nvme_rdma_ctrl *ctrl; | |
117 | struct nvme_rdma_device *device; | |
118 | struct ib_cq *ib_cq; | |
119 | struct ib_qp *qp; | |
120 | ||
121 | unsigned long flags; | |
122 | struct rdma_cm_id *cm_id; | |
123 | int cm_error; | |
124 | struct completion cm_done; | |
125 | }; | |
126 | ||
127 | struct nvme_rdma_ctrl { | |
128 | /* read and written in the hot path */ | |
129 | spinlock_t lock; | |
130 | ||
131 | /* read only in the hot path */ | |
132 | struct nvme_rdma_queue *queues; | |
133 | u32 queue_count; | |
134 | ||
135 | /* other member variables */ | |
71102307 CH |
136 | struct blk_mq_tag_set tag_set; |
137 | struct work_struct delete_work; | |
138 | struct work_struct reset_work; | |
139 | struct work_struct err_work; | |
140 | ||
141 | struct nvme_rdma_qe async_event_sqe; | |
142 | ||
143 | int reconnect_delay; | |
144 | struct delayed_work reconnect_work; | |
145 | ||
146 | struct list_head list; | |
147 | ||
148 | struct blk_mq_tag_set admin_tag_set; | |
149 | struct nvme_rdma_device *device; | |
150 | ||
151 | u64 cap; | |
152 | u32 max_fr_pages; | |
153 | ||
154 | union { | |
155 | struct sockaddr addr; | |
156 | struct sockaddr_in addr_in; | |
157 | }; | |
158 | ||
159 | struct nvme_ctrl ctrl; | |
160 | }; | |
161 | ||
162 | static inline struct nvme_rdma_ctrl *to_rdma_ctrl(struct nvme_ctrl *ctrl) | |
163 | { | |
164 | return container_of(ctrl, struct nvme_rdma_ctrl, ctrl); | |
165 | } | |
166 | ||
167 | static LIST_HEAD(device_list); | |
168 | static DEFINE_MUTEX(device_list_mutex); | |
169 | ||
170 | static LIST_HEAD(nvme_rdma_ctrl_list); | |
171 | static DEFINE_MUTEX(nvme_rdma_ctrl_mutex); | |
172 | ||
173 | static struct workqueue_struct *nvme_rdma_wq; | |
174 | ||
175 | /* | |
176 | * Disabling this option makes small I/O goes faster, but is fundamentally | |
177 | * unsafe. With it turned off we will have to register a global rkey that | |
178 | * allows read and write access to all physical memory. | |
179 | */ | |
180 | static bool register_always = true; | |
181 | module_param(register_always, bool, 0444); | |
182 | MODULE_PARM_DESC(register_always, | |
183 | "Use memory registration even for contiguous memory regions"); | |
184 | ||
185 | static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id, | |
186 | struct rdma_cm_event *event); | |
187 | static void nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc); | |
71102307 CH |
188 | |
189 | /* XXX: really should move to a generic header sooner or later.. */ | |
190 | static inline void put_unaligned_le24(u32 val, u8 *p) | |
191 | { | |
192 | *p++ = val; | |
193 | *p++ = val >> 8; | |
194 | *p++ = val >> 16; | |
195 | } | |
196 | ||
197 | static inline int nvme_rdma_queue_idx(struct nvme_rdma_queue *queue) | |
198 | { | |
199 | return queue - queue->ctrl->queues; | |
200 | } | |
201 | ||
202 | static inline size_t nvme_rdma_inline_data_size(struct nvme_rdma_queue *queue) | |
203 | { | |
204 | return queue->cmnd_capsule_len - sizeof(struct nvme_command); | |
205 | } | |
206 | ||
207 | static void nvme_rdma_free_qe(struct ib_device *ibdev, struct nvme_rdma_qe *qe, | |
208 | size_t capsule_size, enum dma_data_direction dir) | |
209 | { | |
210 | ib_dma_unmap_single(ibdev, qe->dma, capsule_size, dir); | |
211 | kfree(qe->data); | |
212 | } | |
213 | ||
214 | static int nvme_rdma_alloc_qe(struct ib_device *ibdev, struct nvme_rdma_qe *qe, | |
215 | size_t capsule_size, enum dma_data_direction dir) | |
216 | { | |
217 | qe->data = kzalloc(capsule_size, GFP_KERNEL); | |
218 | if (!qe->data) | |
219 | return -ENOMEM; | |
220 | ||
221 | qe->dma = ib_dma_map_single(ibdev, qe->data, capsule_size, dir); | |
222 | if (ib_dma_mapping_error(ibdev, qe->dma)) { | |
223 | kfree(qe->data); | |
224 | return -ENOMEM; | |
225 | } | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | static void nvme_rdma_free_ring(struct ib_device *ibdev, | |
231 | struct nvme_rdma_qe *ring, size_t ib_queue_size, | |
232 | size_t capsule_size, enum dma_data_direction dir) | |
233 | { | |
234 | int i; | |
235 | ||
236 | for (i = 0; i < ib_queue_size; i++) | |
237 | nvme_rdma_free_qe(ibdev, &ring[i], capsule_size, dir); | |
238 | kfree(ring); | |
239 | } | |
240 | ||
241 | static struct nvme_rdma_qe *nvme_rdma_alloc_ring(struct ib_device *ibdev, | |
242 | size_t ib_queue_size, size_t capsule_size, | |
243 | enum dma_data_direction dir) | |
244 | { | |
245 | struct nvme_rdma_qe *ring; | |
246 | int i; | |
247 | ||
248 | ring = kcalloc(ib_queue_size, sizeof(struct nvme_rdma_qe), GFP_KERNEL); | |
249 | if (!ring) | |
250 | return NULL; | |
251 | ||
252 | for (i = 0; i < ib_queue_size; i++) { | |
253 | if (nvme_rdma_alloc_qe(ibdev, &ring[i], capsule_size, dir)) | |
254 | goto out_free_ring; | |
255 | } | |
256 | ||
257 | return ring; | |
258 | ||
259 | out_free_ring: | |
260 | nvme_rdma_free_ring(ibdev, ring, i, capsule_size, dir); | |
261 | return NULL; | |
262 | } | |
263 | ||
264 | static void nvme_rdma_qp_event(struct ib_event *event, void *context) | |
265 | { | |
27a4beef MG |
266 | pr_debug("QP event %s (%d)\n", |
267 | ib_event_msg(event->event), event->event); | |
268 | ||
71102307 CH |
269 | } |
270 | ||
271 | static int nvme_rdma_wait_for_cm(struct nvme_rdma_queue *queue) | |
272 | { | |
273 | wait_for_completion_interruptible_timeout(&queue->cm_done, | |
274 | msecs_to_jiffies(NVME_RDMA_CONNECT_TIMEOUT_MS) + 1); | |
275 | return queue->cm_error; | |
276 | } | |
277 | ||
278 | static int nvme_rdma_create_qp(struct nvme_rdma_queue *queue, const int factor) | |
279 | { | |
280 | struct nvme_rdma_device *dev = queue->device; | |
281 | struct ib_qp_init_attr init_attr; | |
282 | int ret; | |
283 | ||
284 | memset(&init_attr, 0, sizeof(init_attr)); | |
285 | init_attr.event_handler = nvme_rdma_qp_event; | |
286 | /* +1 for drain */ | |
287 | init_attr.cap.max_send_wr = factor * queue->queue_size + 1; | |
288 | /* +1 for drain */ | |
289 | init_attr.cap.max_recv_wr = queue->queue_size + 1; | |
290 | init_attr.cap.max_recv_sge = 1; | |
291 | init_attr.cap.max_send_sge = 1 + NVME_RDMA_MAX_INLINE_SEGMENTS; | |
292 | init_attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
293 | init_attr.qp_type = IB_QPT_RC; | |
294 | init_attr.send_cq = queue->ib_cq; | |
295 | init_attr.recv_cq = queue->ib_cq; | |
296 | ||
297 | ret = rdma_create_qp(queue->cm_id, dev->pd, &init_attr); | |
298 | ||
299 | queue->qp = queue->cm_id->qp; | |
300 | return ret; | |
301 | } | |
302 | ||
303 | static int nvme_rdma_reinit_request(void *data, struct request *rq) | |
304 | { | |
305 | struct nvme_rdma_ctrl *ctrl = data; | |
306 | struct nvme_rdma_device *dev = ctrl->device; | |
307 | struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); | |
308 | int ret = 0; | |
309 | ||
f5b7b559 | 310 | if (!req->mr->need_inval) |
71102307 CH |
311 | goto out; |
312 | ||
313 | ib_dereg_mr(req->mr); | |
314 | ||
315 | req->mr = ib_alloc_mr(dev->pd, IB_MR_TYPE_MEM_REG, | |
316 | ctrl->max_fr_pages); | |
317 | if (IS_ERR(req->mr)) { | |
71102307 | 318 | ret = PTR_ERR(req->mr); |
458a9632 | 319 | req->mr = NULL; |
1bda18de | 320 | goto out; |
71102307 CH |
321 | } |
322 | ||
f5b7b559 | 323 | req->mr->need_inval = false; |
71102307 CH |
324 | |
325 | out: | |
326 | return ret; | |
327 | } | |
328 | ||
329 | static void __nvme_rdma_exit_request(struct nvme_rdma_ctrl *ctrl, | |
330 | struct request *rq, unsigned int queue_idx) | |
331 | { | |
332 | struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); | |
333 | struct nvme_rdma_queue *queue = &ctrl->queues[queue_idx]; | |
334 | struct nvme_rdma_device *dev = queue->device; | |
335 | ||
336 | if (req->mr) | |
337 | ib_dereg_mr(req->mr); | |
338 | ||
339 | nvme_rdma_free_qe(dev->dev, &req->sqe, sizeof(struct nvme_command), | |
340 | DMA_TO_DEVICE); | |
341 | } | |
342 | ||
343 | static void nvme_rdma_exit_request(void *data, struct request *rq, | |
344 | unsigned int hctx_idx, unsigned int rq_idx) | |
345 | { | |
346 | return __nvme_rdma_exit_request(data, rq, hctx_idx + 1); | |
347 | } | |
348 | ||
349 | static void nvme_rdma_exit_admin_request(void *data, struct request *rq, | |
350 | unsigned int hctx_idx, unsigned int rq_idx) | |
351 | { | |
352 | return __nvme_rdma_exit_request(data, rq, 0); | |
353 | } | |
354 | ||
355 | static int __nvme_rdma_init_request(struct nvme_rdma_ctrl *ctrl, | |
356 | struct request *rq, unsigned int queue_idx) | |
357 | { | |
358 | struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); | |
359 | struct nvme_rdma_queue *queue = &ctrl->queues[queue_idx]; | |
360 | struct nvme_rdma_device *dev = queue->device; | |
361 | struct ib_device *ibdev = dev->dev; | |
362 | int ret; | |
363 | ||
364 | BUG_ON(queue_idx >= ctrl->queue_count); | |
365 | ||
366 | ret = nvme_rdma_alloc_qe(ibdev, &req->sqe, sizeof(struct nvme_command), | |
367 | DMA_TO_DEVICE); | |
368 | if (ret) | |
369 | return ret; | |
370 | ||
371 | req->mr = ib_alloc_mr(dev->pd, IB_MR_TYPE_MEM_REG, | |
372 | ctrl->max_fr_pages); | |
373 | if (IS_ERR(req->mr)) { | |
374 | ret = PTR_ERR(req->mr); | |
375 | goto out_free_qe; | |
376 | } | |
377 | ||
378 | req->queue = queue; | |
379 | ||
380 | return 0; | |
381 | ||
382 | out_free_qe: | |
383 | nvme_rdma_free_qe(dev->dev, &req->sqe, sizeof(struct nvme_command), | |
384 | DMA_TO_DEVICE); | |
385 | return -ENOMEM; | |
386 | } | |
387 | ||
388 | static int nvme_rdma_init_request(void *data, struct request *rq, | |
389 | unsigned int hctx_idx, unsigned int rq_idx, | |
390 | unsigned int numa_node) | |
391 | { | |
392 | return __nvme_rdma_init_request(data, rq, hctx_idx + 1); | |
393 | } | |
394 | ||
395 | static int nvme_rdma_init_admin_request(void *data, struct request *rq, | |
396 | unsigned int hctx_idx, unsigned int rq_idx, | |
397 | unsigned int numa_node) | |
398 | { | |
399 | return __nvme_rdma_init_request(data, rq, 0); | |
400 | } | |
401 | ||
402 | static int nvme_rdma_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
403 | unsigned int hctx_idx) | |
404 | { | |
405 | struct nvme_rdma_ctrl *ctrl = data; | |
406 | struct nvme_rdma_queue *queue = &ctrl->queues[hctx_idx + 1]; | |
407 | ||
408 | BUG_ON(hctx_idx >= ctrl->queue_count); | |
409 | ||
410 | hctx->driver_data = queue; | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static int nvme_rdma_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, | |
415 | unsigned int hctx_idx) | |
416 | { | |
417 | struct nvme_rdma_ctrl *ctrl = data; | |
418 | struct nvme_rdma_queue *queue = &ctrl->queues[0]; | |
419 | ||
420 | BUG_ON(hctx_idx != 0); | |
421 | ||
422 | hctx->driver_data = queue; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static void nvme_rdma_free_dev(struct kref *ref) | |
427 | { | |
428 | struct nvme_rdma_device *ndev = | |
429 | container_of(ref, struct nvme_rdma_device, ref); | |
430 | ||
431 | mutex_lock(&device_list_mutex); | |
432 | list_del(&ndev->entry); | |
433 | mutex_unlock(&device_list_mutex); | |
434 | ||
71102307 | 435 | ib_dealloc_pd(ndev->pd); |
71102307 CH |
436 | kfree(ndev); |
437 | } | |
438 | ||
439 | static void nvme_rdma_dev_put(struct nvme_rdma_device *dev) | |
440 | { | |
441 | kref_put(&dev->ref, nvme_rdma_free_dev); | |
442 | } | |
443 | ||
444 | static int nvme_rdma_dev_get(struct nvme_rdma_device *dev) | |
445 | { | |
446 | return kref_get_unless_zero(&dev->ref); | |
447 | } | |
448 | ||
449 | static struct nvme_rdma_device * | |
450 | nvme_rdma_find_get_device(struct rdma_cm_id *cm_id) | |
451 | { | |
452 | struct nvme_rdma_device *ndev; | |
453 | ||
454 | mutex_lock(&device_list_mutex); | |
455 | list_for_each_entry(ndev, &device_list, entry) { | |
456 | if (ndev->dev->node_guid == cm_id->device->node_guid && | |
457 | nvme_rdma_dev_get(ndev)) | |
458 | goto out_unlock; | |
459 | } | |
460 | ||
461 | ndev = kzalloc(sizeof(*ndev), GFP_KERNEL); | |
462 | if (!ndev) | |
463 | goto out_err; | |
464 | ||
465 | ndev->dev = cm_id->device; | |
466 | kref_init(&ndev->ref); | |
467 | ||
11975e01 CH |
468 | ndev->pd = ib_alloc_pd(ndev->dev, |
469 | register_always ? 0 : IB_PD_UNSAFE_GLOBAL_RKEY); | |
71102307 CH |
470 | if (IS_ERR(ndev->pd)) |
471 | goto out_free_dev; | |
472 | ||
71102307 CH |
473 | if (!(ndev->dev->attrs.device_cap_flags & |
474 | IB_DEVICE_MEM_MGT_EXTENSIONS)) { | |
475 | dev_err(&ndev->dev->dev, | |
476 | "Memory registrations not supported.\n"); | |
11975e01 | 477 | goto out_free_pd; |
71102307 CH |
478 | } |
479 | ||
480 | list_add(&ndev->entry, &device_list); | |
481 | out_unlock: | |
482 | mutex_unlock(&device_list_mutex); | |
483 | return ndev; | |
484 | ||
71102307 CH |
485 | out_free_pd: |
486 | ib_dealloc_pd(ndev->pd); | |
487 | out_free_dev: | |
488 | kfree(ndev); | |
489 | out_err: | |
490 | mutex_unlock(&device_list_mutex); | |
491 | return NULL; | |
492 | } | |
493 | ||
494 | static void nvme_rdma_destroy_queue_ib(struct nvme_rdma_queue *queue) | |
495 | { | |
f361e5a0 SW |
496 | struct nvme_rdma_device *dev; |
497 | struct ib_device *ibdev; | |
71102307 | 498 | |
f361e5a0 SW |
499 | if (!test_and_clear_bit(NVME_RDMA_IB_QUEUE_ALLOCATED, &queue->flags)) |
500 | return; | |
501 | ||
502 | dev = queue->device; | |
503 | ibdev = dev->dev; | |
71102307 CH |
504 | rdma_destroy_qp(queue->cm_id); |
505 | ib_free_cq(queue->ib_cq); | |
506 | ||
507 | nvme_rdma_free_ring(ibdev, queue->rsp_ring, queue->queue_size, | |
508 | sizeof(struct nvme_completion), DMA_FROM_DEVICE); | |
509 | ||
510 | nvme_rdma_dev_put(dev); | |
511 | } | |
512 | ||
513 | static int nvme_rdma_create_queue_ib(struct nvme_rdma_queue *queue, | |
514 | struct nvme_rdma_device *dev) | |
515 | { | |
516 | struct ib_device *ibdev = dev->dev; | |
517 | const int send_wr_factor = 3; /* MR, SEND, INV */ | |
518 | const int cq_factor = send_wr_factor + 1; /* + RECV */ | |
519 | int comp_vector, idx = nvme_rdma_queue_idx(queue); | |
520 | ||
521 | int ret; | |
522 | ||
523 | queue->device = dev; | |
524 | ||
525 | /* | |
526 | * The admin queue is barely used once the controller is live, so don't | |
527 | * bother to spread it out. | |
528 | */ | |
529 | if (idx == 0) | |
530 | comp_vector = 0; | |
531 | else | |
532 | comp_vector = idx % ibdev->num_comp_vectors; | |
533 | ||
534 | ||
535 | /* +1 for ib_stop_cq */ | |
536 | queue->ib_cq = ib_alloc_cq(dev->dev, queue, | |
537 | cq_factor * queue->queue_size + 1, comp_vector, | |
538 | IB_POLL_SOFTIRQ); | |
539 | if (IS_ERR(queue->ib_cq)) { | |
540 | ret = PTR_ERR(queue->ib_cq); | |
541 | goto out; | |
542 | } | |
543 | ||
544 | ret = nvme_rdma_create_qp(queue, send_wr_factor); | |
545 | if (ret) | |
546 | goto out_destroy_ib_cq; | |
547 | ||
548 | queue->rsp_ring = nvme_rdma_alloc_ring(ibdev, queue->queue_size, | |
549 | sizeof(struct nvme_completion), DMA_FROM_DEVICE); | |
550 | if (!queue->rsp_ring) { | |
551 | ret = -ENOMEM; | |
552 | goto out_destroy_qp; | |
553 | } | |
f361e5a0 | 554 | set_bit(NVME_RDMA_IB_QUEUE_ALLOCATED, &queue->flags); |
71102307 CH |
555 | |
556 | return 0; | |
557 | ||
558 | out_destroy_qp: | |
559 | ib_destroy_qp(queue->qp); | |
560 | out_destroy_ib_cq: | |
561 | ib_free_cq(queue->ib_cq); | |
562 | out: | |
563 | return ret; | |
564 | } | |
565 | ||
566 | static int nvme_rdma_init_queue(struct nvme_rdma_ctrl *ctrl, | |
567 | int idx, size_t queue_size) | |
568 | { | |
569 | struct nvme_rdma_queue *queue; | |
570 | int ret; | |
571 | ||
572 | queue = &ctrl->queues[idx]; | |
573 | queue->ctrl = ctrl; | |
574 | init_completion(&queue->cm_done); | |
575 | ||
576 | if (idx > 0) | |
577 | queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; | |
578 | else | |
579 | queue->cmnd_capsule_len = sizeof(struct nvme_command); | |
580 | ||
581 | queue->queue_size = queue_size; | |
582 | ||
583 | queue->cm_id = rdma_create_id(&init_net, nvme_rdma_cm_handler, queue, | |
584 | RDMA_PS_TCP, IB_QPT_RC); | |
585 | if (IS_ERR(queue->cm_id)) { | |
586 | dev_info(ctrl->ctrl.device, | |
587 | "failed to create CM ID: %ld\n", PTR_ERR(queue->cm_id)); | |
588 | return PTR_ERR(queue->cm_id); | |
589 | } | |
590 | ||
591 | queue->cm_error = -ETIMEDOUT; | |
592 | ret = rdma_resolve_addr(queue->cm_id, NULL, &ctrl->addr, | |
593 | NVME_RDMA_CONNECT_TIMEOUT_MS); | |
594 | if (ret) { | |
595 | dev_info(ctrl->ctrl.device, | |
596 | "rdma_resolve_addr failed (%d).\n", ret); | |
597 | goto out_destroy_cm_id; | |
598 | } | |
599 | ||
600 | ret = nvme_rdma_wait_for_cm(queue); | |
601 | if (ret) { | |
602 | dev_info(ctrl->ctrl.device, | |
603 | "rdma_resolve_addr wait failed (%d).\n", ret); | |
604 | goto out_destroy_cm_id; | |
605 | } | |
606 | ||
3b4ac786 | 607 | clear_bit(NVME_RDMA_Q_DELETING, &queue->flags); |
71102307 CH |
608 | set_bit(NVME_RDMA_Q_CONNECTED, &queue->flags); |
609 | ||
610 | return 0; | |
611 | ||
612 | out_destroy_cm_id: | |
f361e5a0 | 613 | nvme_rdma_destroy_queue_ib(queue); |
71102307 CH |
614 | rdma_destroy_id(queue->cm_id); |
615 | return ret; | |
616 | } | |
617 | ||
618 | static void nvme_rdma_stop_queue(struct nvme_rdma_queue *queue) | |
619 | { | |
620 | rdma_disconnect(queue->cm_id); | |
621 | ib_drain_qp(queue->qp); | |
622 | } | |
623 | ||
624 | static void nvme_rdma_free_queue(struct nvme_rdma_queue *queue) | |
625 | { | |
626 | nvme_rdma_destroy_queue_ib(queue); | |
627 | rdma_destroy_id(queue->cm_id); | |
628 | } | |
629 | ||
630 | static void nvme_rdma_stop_and_free_queue(struct nvme_rdma_queue *queue) | |
631 | { | |
e89ca58f | 632 | if (test_and_set_bit(NVME_RDMA_Q_DELETING, &queue->flags)) |
71102307 CH |
633 | return; |
634 | nvme_rdma_stop_queue(queue); | |
635 | nvme_rdma_free_queue(queue); | |
636 | } | |
637 | ||
638 | static void nvme_rdma_free_io_queues(struct nvme_rdma_ctrl *ctrl) | |
639 | { | |
640 | int i; | |
641 | ||
642 | for (i = 1; i < ctrl->queue_count; i++) | |
643 | nvme_rdma_stop_and_free_queue(&ctrl->queues[i]); | |
644 | } | |
645 | ||
646 | static int nvme_rdma_connect_io_queues(struct nvme_rdma_ctrl *ctrl) | |
647 | { | |
648 | int i, ret = 0; | |
649 | ||
650 | for (i = 1; i < ctrl->queue_count; i++) { | |
651 | ret = nvmf_connect_io_queue(&ctrl->ctrl, i); | |
c8dbc37c SW |
652 | if (ret) { |
653 | dev_info(ctrl->ctrl.device, | |
654 | "failed to connect i/o queue: %d\n", ret); | |
655 | goto out_free_queues; | |
656 | } | |
553cd9ef | 657 | set_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[i].flags); |
71102307 CH |
658 | } |
659 | ||
c8dbc37c SW |
660 | return 0; |
661 | ||
662 | out_free_queues: | |
663 | nvme_rdma_free_io_queues(ctrl); | |
71102307 CH |
664 | return ret; |
665 | } | |
666 | ||
667 | static int nvme_rdma_init_io_queues(struct nvme_rdma_ctrl *ctrl) | |
668 | { | |
669 | int i, ret; | |
670 | ||
671 | for (i = 1; i < ctrl->queue_count; i++) { | |
c5af8654 JF |
672 | ret = nvme_rdma_init_queue(ctrl, i, |
673 | ctrl->ctrl.opts->queue_size); | |
71102307 CH |
674 | if (ret) { |
675 | dev_info(ctrl->ctrl.device, | |
676 | "failed to initialize i/o queue: %d\n", ret); | |
677 | goto out_free_queues; | |
678 | } | |
679 | } | |
680 | ||
681 | return 0; | |
682 | ||
683 | out_free_queues: | |
f361e5a0 | 684 | for (i--; i >= 1; i--) |
71102307 CH |
685 | nvme_rdma_stop_and_free_queue(&ctrl->queues[i]); |
686 | ||
687 | return ret; | |
688 | } | |
689 | ||
690 | static void nvme_rdma_destroy_admin_queue(struct nvme_rdma_ctrl *ctrl) | |
691 | { | |
692 | nvme_rdma_free_qe(ctrl->queues[0].device->dev, &ctrl->async_event_sqe, | |
693 | sizeof(struct nvme_command), DMA_TO_DEVICE); | |
694 | nvme_rdma_stop_and_free_queue(&ctrl->queues[0]); | |
695 | blk_cleanup_queue(ctrl->ctrl.admin_q); | |
696 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
697 | nvme_rdma_dev_put(ctrl->device); | |
698 | } | |
699 | ||
700 | static void nvme_rdma_free_ctrl(struct nvme_ctrl *nctrl) | |
701 | { | |
702 | struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl); | |
703 | ||
704 | if (list_empty(&ctrl->list)) | |
705 | goto free_ctrl; | |
706 | ||
707 | mutex_lock(&nvme_rdma_ctrl_mutex); | |
708 | list_del(&ctrl->list); | |
709 | mutex_unlock(&nvme_rdma_ctrl_mutex); | |
710 | ||
71102307 CH |
711 | kfree(ctrl->queues); |
712 | nvmf_free_options(nctrl->opts); | |
713 | free_ctrl: | |
714 | kfree(ctrl); | |
715 | } | |
716 | ||
717 | static void nvme_rdma_reconnect_ctrl_work(struct work_struct *work) | |
718 | { | |
719 | struct nvme_rdma_ctrl *ctrl = container_of(to_delayed_work(work), | |
720 | struct nvme_rdma_ctrl, reconnect_work); | |
721 | bool changed; | |
722 | int ret; | |
723 | ||
724 | if (ctrl->queue_count > 1) { | |
725 | nvme_rdma_free_io_queues(ctrl); | |
726 | ||
727 | ret = blk_mq_reinit_tagset(&ctrl->tag_set); | |
728 | if (ret) | |
729 | goto requeue; | |
730 | } | |
731 | ||
732 | nvme_rdma_stop_and_free_queue(&ctrl->queues[0]); | |
733 | ||
734 | ret = blk_mq_reinit_tagset(&ctrl->admin_tag_set); | |
735 | if (ret) | |
736 | goto requeue; | |
737 | ||
738 | ret = nvme_rdma_init_queue(ctrl, 0, NVMF_AQ_DEPTH); | |
739 | if (ret) | |
740 | goto requeue; | |
741 | ||
742 | blk_mq_start_stopped_hw_queues(ctrl->ctrl.admin_q, true); | |
743 | ||
744 | ret = nvmf_connect_admin_queue(&ctrl->ctrl); | |
745 | if (ret) | |
746 | goto stop_admin_q; | |
747 | ||
553cd9ef CH |
748 | set_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[0].flags); |
749 | ||
71102307 CH |
750 | ret = nvme_enable_ctrl(&ctrl->ctrl, ctrl->cap); |
751 | if (ret) | |
752 | goto stop_admin_q; | |
753 | ||
754 | nvme_start_keep_alive(&ctrl->ctrl); | |
755 | ||
756 | if (ctrl->queue_count > 1) { | |
757 | ret = nvme_rdma_init_io_queues(ctrl); | |
758 | if (ret) | |
759 | goto stop_admin_q; | |
760 | ||
761 | ret = nvme_rdma_connect_io_queues(ctrl); | |
762 | if (ret) | |
763 | goto stop_admin_q; | |
764 | } | |
765 | ||
766 | changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); | |
767 | WARN_ON_ONCE(!changed); | |
768 | ||
5f372eb3 | 769 | if (ctrl->queue_count > 1) { |
71102307 | 770 | nvme_start_queues(&ctrl->ctrl); |
5f372eb3 | 771 | nvme_queue_scan(&ctrl->ctrl); |
3ef1b4b2 | 772 | nvme_queue_async_events(&ctrl->ctrl); |
5f372eb3 | 773 | } |
71102307 CH |
774 | |
775 | dev_info(ctrl->ctrl.device, "Successfully reconnected\n"); | |
776 | ||
777 | return; | |
778 | ||
779 | stop_admin_q: | |
780 | blk_mq_stop_hw_queues(ctrl->ctrl.admin_q); | |
781 | requeue: | |
782 | /* Make sure we are not resetting/deleting */ | |
783 | if (ctrl->ctrl.state == NVME_CTRL_RECONNECTING) { | |
784 | dev_info(ctrl->ctrl.device, | |
785 | "Failed reconnect attempt, requeueing...\n"); | |
786 | queue_delayed_work(nvme_rdma_wq, &ctrl->reconnect_work, | |
787 | ctrl->reconnect_delay * HZ); | |
788 | } | |
789 | } | |
790 | ||
791 | static void nvme_rdma_error_recovery_work(struct work_struct *work) | |
792 | { | |
793 | struct nvme_rdma_ctrl *ctrl = container_of(work, | |
794 | struct nvme_rdma_ctrl, err_work); | |
e89ca58f | 795 | int i; |
71102307 CH |
796 | |
797 | nvme_stop_keep_alive(&ctrl->ctrl); | |
e89ca58f | 798 | |
553cd9ef | 799 | for (i = 0; i < ctrl->queue_count; i++) { |
e89ca58f | 800 | clear_bit(NVME_RDMA_Q_CONNECTED, &ctrl->queues[i].flags); |
553cd9ef CH |
801 | clear_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[i].flags); |
802 | } | |
e89ca58f | 803 | |
71102307 CH |
804 | if (ctrl->queue_count > 1) |
805 | nvme_stop_queues(&ctrl->ctrl); | |
806 | blk_mq_stop_hw_queues(ctrl->ctrl.admin_q); | |
807 | ||
808 | /* We must take care of fastfail/requeue all our inflight requests */ | |
809 | if (ctrl->queue_count > 1) | |
810 | blk_mq_tagset_busy_iter(&ctrl->tag_set, | |
811 | nvme_cancel_request, &ctrl->ctrl); | |
812 | blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, | |
813 | nvme_cancel_request, &ctrl->ctrl); | |
814 | ||
815 | dev_info(ctrl->ctrl.device, "reconnecting in %d seconds\n", | |
816 | ctrl->reconnect_delay); | |
817 | ||
818 | queue_delayed_work(nvme_rdma_wq, &ctrl->reconnect_work, | |
819 | ctrl->reconnect_delay * HZ); | |
820 | } | |
821 | ||
822 | static void nvme_rdma_error_recovery(struct nvme_rdma_ctrl *ctrl) | |
823 | { | |
824 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RECONNECTING)) | |
825 | return; | |
826 | ||
827 | queue_work(nvme_rdma_wq, &ctrl->err_work); | |
828 | } | |
829 | ||
830 | static void nvme_rdma_wr_error(struct ib_cq *cq, struct ib_wc *wc, | |
831 | const char *op) | |
832 | { | |
833 | struct nvme_rdma_queue *queue = cq->cq_context; | |
834 | struct nvme_rdma_ctrl *ctrl = queue->ctrl; | |
835 | ||
836 | if (ctrl->ctrl.state == NVME_CTRL_LIVE) | |
837 | dev_info(ctrl->ctrl.device, | |
838 | "%s for CQE 0x%p failed with status %s (%d)\n", | |
839 | op, wc->wr_cqe, | |
840 | ib_wc_status_msg(wc->status), wc->status); | |
841 | nvme_rdma_error_recovery(ctrl); | |
842 | } | |
843 | ||
844 | static void nvme_rdma_memreg_done(struct ib_cq *cq, struct ib_wc *wc) | |
845 | { | |
846 | if (unlikely(wc->status != IB_WC_SUCCESS)) | |
847 | nvme_rdma_wr_error(cq, wc, "MEMREG"); | |
848 | } | |
849 | ||
850 | static void nvme_rdma_inv_rkey_done(struct ib_cq *cq, struct ib_wc *wc) | |
851 | { | |
852 | if (unlikely(wc->status != IB_WC_SUCCESS)) | |
853 | nvme_rdma_wr_error(cq, wc, "LOCAL_INV"); | |
854 | } | |
855 | ||
856 | static int nvme_rdma_inv_rkey(struct nvme_rdma_queue *queue, | |
857 | struct nvme_rdma_request *req) | |
858 | { | |
859 | struct ib_send_wr *bad_wr; | |
860 | struct ib_send_wr wr = { | |
861 | .opcode = IB_WR_LOCAL_INV, | |
862 | .next = NULL, | |
863 | .num_sge = 0, | |
864 | .send_flags = 0, | |
865 | .ex.invalidate_rkey = req->mr->rkey, | |
866 | }; | |
867 | ||
868 | req->reg_cqe.done = nvme_rdma_inv_rkey_done; | |
869 | wr.wr_cqe = &req->reg_cqe; | |
870 | ||
871 | return ib_post_send(queue->qp, &wr, &bad_wr); | |
872 | } | |
873 | ||
874 | static void nvme_rdma_unmap_data(struct nvme_rdma_queue *queue, | |
875 | struct request *rq) | |
876 | { | |
877 | struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); | |
878 | struct nvme_rdma_ctrl *ctrl = queue->ctrl; | |
879 | struct nvme_rdma_device *dev = queue->device; | |
880 | struct ib_device *ibdev = dev->dev; | |
881 | int res; | |
882 | ||
883 | if (!blk_rq_bytes(rq)) | |
884 | return; | |
885 | ||
f5b7b559 | 886 | if (req->mr->need_inval) { |
71102307 CH |
887 | res = nvme_rdma_inv_rkey(queue, req); |
888 | if (res < 0) { | |
889 | dev_err(ctrl->ctrl.device, | |
890 | "Queueing INV WR for rkey %#x failed (%d)\n", | |
891 | req->mr->rkey, res); | |
892 | nvme_rdma_error_recovery(queue->ctrl); | |
893 | } | |
894 | } | |
895 | ||
896 | ib_dma_unmap_sg(ibdev, req->sg_table.sgl, | |
897 | req->nents, rq_data_dir(rq) == | |
898 | WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
899 | ||
900 | nvme_cleanup_cmd(rq); | |
901 | sg_free_table_chained(&req->sg_table, true); | |
902 | } | |
903 | ||
904 | static int nvme_rdma_set_sg_null(struct nvme_command *c) | |
905 | { | |
906 | struct nvme_keyed_sgl_desc *sg = &c->common.dptr.ksgl; | |
907 | ||
908 | sg->addr = 0; | |
909 | put_unaligned_le24(0, sg->length); | |
910 | put_unaligned_le32(0, sg->key); | |
911 | sg->type = NVME_KEY_SGL_FMT_DATA_DESC << 4; | |
912 | return 0; | |
913 | } | |
914 | ||
915 | static int nvme_rdma_map_sg_inline(struct nvme_rdma_queue *queue, | |
916 | struct nvme_rdma_request *req, struct nvme_command *c) | |
917 | { | |
918 | struct nvme_sgl_desc *sg = &c->common.dptr.sgl; | |
919 | ||
920 | req->sge[1].addr = sg_dma_address(req->sg_table.sgl); | |
921 | req->sge[1].length = sg_dma_len(req->sg_table.sgl); | |
922 | req->sge[1].lkey = queue->device->pd->local_dma_lkey; | |
923 | ||
924 | sg->addr = cpu_to_le64(queue->ctrl->ctrl.icdoff); | |
925 | sg->length = cpu_to_le32(sg_dma_len(req->sg_table.sgl)); | |
926 | sg->type = (NVME_SGL_FMT_DATA_DESC << 4) | NVME_SGL_FMT_OFFSET; | |
927 | ||
928 | req->inline_data = true; | |
929 | req->num_sge++; | |
930 | return 0; | |
931 | } | |
932 | ||
933 | static int nvme_rdma_map_sg_single(struct nvme_rdma_queue *queue, | |
934 | struct nvme_rdma_request *req, struct nvme_command *c) | |
935 | { | |
936 | struct nvme_keyed_sgl_desc *sg = &c->common.dptr.ksgl; | |
937 | ||
938 | sg->addr = cpu_to_le64(sg_dma_address(req->sg_table.sgl)); | |
939 | put_unaligned_le24(sg_dma_len(req->sg_table.sgl), sg->length); | |
11975e01 | 940 | put_unaligned_le32(queue->device->pd->unsafe_global_rkey, sg->key); |
71102307 CH |
941 | sg->type = NVME_KEY_SGL_FMT_DATA_DESC << 4; |
942 | return 0; | |
943 | } | |
944 | ||
945 | static int nvme_rdma_map_sg_fr(struct nvme_rdma_queue *queue, | |
946 | struct nvme_rdma_request *req, struct nvme_command *c, | |
947 | int count) | |
948 | { | |
949 | struct nvme_keyed_sgl_desc *sg = &c->common.dptr.ksgl; | |
950 | int nr; | |
951 | ||
952 | nr = ib_map_mr_sg(req->mr, req->sg_table.sgl, count, NULL, PAGE_SIZE); | |
953 | if (nr < count) { | |
954 | if (nr < 0) | |
955 | return nr; | |
956 | return -EINVAL; | |
957 | } | |
958 | ||
959 | ib_update_fast_reg_key(req->mr, ib_inc_rkey(req->mr->rkey)); | |
960 | ||
961 | req->reg_cqe.done = nvme_rdma_memreg_done; | |
962 | memset(&req->reg_wr, 0, sizeof(req->reg_wr)); | |
963 | req->reg_wr.wr.opcode = IB_WR_REG_MR; | |
964 | req->reg_wr.wr.wr_cqe = &req->reg_cqe; | |
965 | req->reg_wr.wr.num_sge = 0; | |
966 | req->reg_wr.mr = req->mr; | |
967 | req->reg_wr.key = req->mr->rkey; | |
968 | req->reg_wr.access = IB_ACCESS_LOCAL_WRITE | | |
969 | IB_ACCESS_REMOTE_READ | | |
970 | IB_ACCESS_REMOTE_WRITE; | |
971 | ||
f5b7b559 | 972 | req->mr->need_inval = true; |
71102307 CH |
973 | |
974 | sg->addr = cpu_to_le64(req->mr->iova); | |
975 | put_unaligned_le24(req->mr->length, sg->length); | |
976 | put_unaligned_le32(req->mr->rkey, sg->key); | |
977 | sg->type = (NVME_KEY_SGL_FMT_DATA_DESC << 4) | | |
978 | NVME_SGL_FMT_INVALIDATE; | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
983 | static int nvme_rdma_map_data(struct nvme_rdma_queue *queue, | |
b131c61d | 984 | struct request *rq, struct nvme_command *c) |
71102307 CH |
985 | { |
986 | struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); | |
987 | struct nvme_rdma_device *dev = queue->device; | |
988 | struct ib_device *ibdev = dev->dev; | |
f9d03f96 | 989 | int count, ret; |
71102307 CH |
990 | |
991 | req->num_sge = 1; | |
992 | req->inline_data = false; | |
f5b7b559 | 993 | req->mr->need_inval = false; |
71102307 CH |
994 | |
995 | c->common.flags |= NVME_CMD_SGL_METABUF; | |
996 | ||
997 | if (!blk_rq_bytes(rq)) | |
998 | return nvme_rdma_set_sg_null(c); | |
999 | ||
1000 | req->sg_table.sgl = req->first_sgl; | |
f9d03f96 CH |
1001 | ret = sg_alloc_table_chained(&req->sg_table, |
1002 | blk_rq_nr_phys_segments(rq), req->sg_table.sgl); | |
71102307 CH |
1003 | if (ret) |
1004 | return -ENOMEM; | |
1005 | ||
f9d03f96 | 1006 | req->nents = blk_rq_map_sg(rq->q, rq, req->sg_table.sgl); |
71102307 | 1007 | |
f9d03f96 | 1008 | count = ib_dma_map_sg(ibdev, req->sg_table.sgl, req->nents, |
71102307 CH |
1009 | rq_data_dir(rq) == WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
1010 | if (unlikely(count <= 0)) { | |
1011 | sg_free_table_chained(&req->sg_table, true); | |
1012 | return -EIO; | |
1013 | } | |
1014 | ||
1015 | if (count == 1) { | |
b131c61d CH |
1016 | if (rq_data_dir(rq) == WRITE && nvme_rdma_queue_idx(queue) && |
1017 | blk_rq_payload_bytes(rq) <= | |
1018 | nvme_rdma_inline_data_size(queue)) | |
71102307 CH |
1019 | return nvme_rdma_map_sg_inline(queue, req, c); |
1020 | ||
11975e01 | 1021 | if (dev->pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) |
71102307 CH |
1022 | return nvme_rdma_map_sg_single(queue, req, c); |
1023 | } | |
1024 | ||
1025 | return nvme_rdma_map_sg_fr(queue, req, c, count); | |
1026 | } | |
1027 | ||
1028 | static void nvme_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc) | |
1029 | { | |
1030 | if (unlikely(wc->status != IB_WC_SUCCESS)) | |
1031 | nvme_rdma_wr_error(cq, wc, "SEND"); | |
1032 | } | |
1033 | ||
1034 | static int nvme_rdma_post_send(struct nvme_rdma_queue *queue, | |
1035 | struct nvme_rdma_qe *qe, struct ib_sge *sge, u32 num_sge, | |
1036 | struct ib_send_wr *first, bool flush) | |
1037 | { | |
1038 | struct ib_send_wr wr, *bad_wr; | |
1039 | int ret; | |
1040 | ||
1041 | sge->addr = qe->dma; | |
1042 | sge->length = sizeof(struct nvme_command), | |
1043 | sge->lkey = queue->device->pd->local_dma_lkey; | |
1044 | ||
1045 | qe->cqe.done = nvme_rdma_send_done; | |
1046 | ||
1047 | wr.next = NULL; | |
1048 | wr.wr_cqe = &qe->cqe; | |
1049 | wr.sg_list = sge; | |
1050 | wr.num_sge = num_sge; | |
1051 | wr.opcode = IB_WR_SEND; | |
1052 | wr.send_flags = 0; | |
1053 | ||
1054 | /* | |
1055 | * Unsignalled send completions are another giant desaster in the | |
1056 | * IB Verbs spec: If we don't regularly post signalled sends | |
1057 | * the send queue will fill up and only a QP reset will rescue us. | |
1058 | * Would have been way to obvious to handle this in hardware or | |
1059 | * at least the RDMA stack.. | |
1060 | * | |
1061 | * This messy and racy code sniplet is copy and pasted from the iSER | |
1062 | * initiator, and the magic '32' comes from there as well. | |
1063 | * | |
1064 | * Always signal the flushes. The magic request used for the flush | |
1065 | * sequencer is not allocated in our driver's tagset and it's | |
1066 | * triggered to be freed by blk_cleanup_queue(). So we need to | |
1067 | * always mark it as signaled to ensure that the "wr_cqe", which is | |
1068 | * embeded in request's payload, is not freed when __ib_process_cq() | |
1069 | * calls wr_cqe->done(). | |
1070 | */ | |
1071 | if ((++queue->sig_count % 32) == 0 || flush) | |
1072 | wr.send_flags |= IB_SEND_SIGNALED; | |
1073 | ||
1074 | if (first) | |
1075 | first->next = ≀ | |
1076 | else | |
1077 | first = ≀ | |
1078 | ||
1079 | ret = ib_post_send(queue->qp, first, &bad_wr); | |
1080 | if (ret) { | |
1081 | dev_err(queue->ctrl->ctrl.device, | |
1082 | "%s failed with error code %d\n", __func__, ret); | |
1083 | } | |
1084 | return ret; | |
1085 | } | |
1086 | ||
1087 | static int nvme_rdma_post_recv(struct nvme_rdma_queue *queue, | |
1088 | struct nvme_rdma_qe *qe) | |
1089 | { | |
1090 | struct ib_recv_wr wr, *bad_wr; | |
1091 | struct ib_sge list; | |
1092 | int ret; | |
1093 | ||
1094 | list.addr = qe->dma; | |
1095 | list.length = sizeof(struct nvme_completion); | |
1096 | list.lkey = queue->device->pd->local_dma_lkey; | |
1097 | ||
1098 | qe->cqe.done = nvme_rdma_recv_done; | |
1099 | ||
1100 | wr.next = NULL; | |
1101 | wr.wr_cqe = &qe->cqe; | |
1102 | wr.sg_list = &list; | |
1103 | wr.num_sge = 1; | |
1104 | ||
1105 | ret = ib_post_recv(queue->qp, &wr, &bad_wr); | |
1106 | if (ret) { | |
1107 | dev_err(queue->ctrl->ctrl.device, | |
1108 | "%s failed with error code %d\n", __func__, ret); | |
1109 | } | |
1110 | return ret; | |
1111 | } | |
1112 | ||
1113 | static struct blk_mq_tags *nvme_rdma_tagset(struct nvme_rdma_queue *queue) | |
1114 | { | |
1115 | u32 queue_idx = nvme_rdma_queue_idx(queue); | |
1116 | ||
1117 | if (queue_idx == 0) | |
1118 | return queue->ctrl->admin_tag_set.tags[queue_idx]; | |
1119 | return queue->ctrl->tag_set.tags[queue_idx - 1]; | |
1120 | } | |
1121 | ||
1122 | static void nvme_rdma_submit_async_event(struct nvme_ctrl *arg, int aer_idx) | |
1123 | { | |
1124 | struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(arg); | |
1125 | struct nvme_rdma_queue *queue = &ctrl->queues[0]; | |
1126 | struct ib_device *dev = queue->device->dev; | |
1127 | struct nvme_rdma_qe *sqe = &ctrl->async_event_sqe; | |
1128 | struct nvme_command *cmd = sqe->data; | |
1129 | struct ib_sge sge; | |
1130 | int ret; | |
1131 | ||
1132 | if (WARN_ON_ONCE(aer_idx != 0)) | |
1133 | return; | |
1134 | ||
1135 | ib_dma_sync_single_for_cpu(dev, sqe->dma, sizeof(*cmd), DMA_TO_DEVICE); | |
1136 | ||
1137 | memset(cmd, 0, sizeof(*cmd)); | |
1138 | cmd->common.opcode = nvme_admin_async_event; | |
1139 | cmd->common.command_id = NVME_RDMA_AQ_BLKMQ_DEPTH; | |
1140 | cmd->common.flags |= NVME_CMD_SGL_METABUF; | |
1141 | nvme_rdma_set_sg_null(cmd); | |
1142 | ||
1143 | ib_dma_sync_single_for_device(dev, sqe->dma, sizeof(*cmd), | |
1144 | DMA_TO_DEVICE); | |
1145 | ||
1146 | ret = nvme_rdma_post_send(queue, sqe, &sge, 1, NULL, false); | |
1147 | WARN_ON_ONCE(ret); | |
1148 | } | |
1149 | ||
1150 | static int nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue, | |
1151 | struct nvme_completion *cqe, struct ib_wc *wc, int tag) | |
1152 | { | |
71102307 CH |
1153 | struct request *rq; |
1154 | struct nvme_rdma_request *req; | |
1155 | int ret = 0; | |
1156 | ||
71102307 CH |
1157 | rq = blk_mq_tag_to_rq(nvme_rdma_tagset(queue), cqe->command_id); |
1158 | if (!rq) { | |
1159 | dev_err(queue->ctrl->ctrl.device, | |
1160 | "tag 0x%x on QP %#x not found\n", | |
1161 | cqe->command_id, queue->qp->qp_num); | |
1162 | nvme_rdma_error_recovery(queue->ctrl); | |
1163 | return ret; | |
1164 | } | |
1165 | req = blk_mq_rq_to_pdu(rq); | |
1166 | ||
71102307 CH |
1167 | if (rq->tag == tag) |
1168 | ret = 1; | |
1169 | ||
1170 | if ((wc->wc_flags & IB_WC_WITH_INVALIDATE) && | |
1171 | wc->ex.invalidate_rkey == req->mr->rkey) | |
f5b7b559 | 1172 | req->mr->need_inval = false; |
71102307 | 1173 | |
d49187e9 CH |
1174 | req->req.result = cqe->result; |
1175 | blk_mq_complete_request(rq, le16_to_cpu(cqe->status) >> 1); | |
71102307 CH |
1176 | return ret; |
1177 | } | |
1178 | ||
1179 | static int __nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc, int tag) | |
1180 | { | |
1181 | struct nvme_rdma_qe *qe = | |
1182 | container_of(wc->wr_cqe, struct nvme_rdma_qe, cqe); | |
1183 | struct nvme_rdma_queue *queue = cq->cq_context; | |
1184 | struct ib_device *ibdev = queue->device->dev; | |
1185 | struct nvme_completion *cqe = qe->data; | |
1186 | const size_t len = sizeof(struct nvme_completion); | |
1187 | int ret = 0; | |
1188 | ||
1189 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
1190 | nvme_rdma_wr_error(cq, wc, "RECV"); | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | ib_dma_sync_single_for_cpu(ibdev, qe->dma, len, DMA_FROM_DEVICE); | |
1195 | /* | |
1196 | * AEN requests are special as they don't time out and can | |
1197 | * survive any kind of queue freeze and often don't respond to | |
1198 | * aborts. We don't even bother to allocate a struct request | |
1199 | * for them but rather special case them here. | |
1200 | */ | |
1201 | if (unlikely(nvme_rdma_queue_idx(queue) == 0 && | |
1202 | cqe->command_id >= NVME_RDMA_AQ_BLKMQ_DEPTH)) | |
7bf58533 CH |
1203 | nvme_complete_async_event(&queue->ctrl->ctrl, cqe->status, |
1204 | &cqe->result); | |
71102307 CH |
1205 | else |
1206 | ret = nvme_rdma_process_nvme_rsp(queue, cqe, wc, tag); | |
1207 | ib_dma_sync_single_for_device(ibdev, qe->dma, len, DMA_FROM_DEVICE); | |
1208 | ||
1209 | nvme_rdma_post_recv(queue, qe); | |
1210 | return ret; | |
1211 | } | |
1212 | ||
1213 | static void nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc) | |
1214 | { | |
1215 | __nvme_rdma_recv_done(cq, wc, -1); | |
1216 | } | |
1217 | ||
1218 | static int nvme_rdma_conn_established(struct nvme_rdma_queue *queue) | |
1219 | { | |
1220 | int ret, i; | |
1221 | ||
1222 | for (i = 0; i < queue->queue_size; i++) { | |
1223 | ret = nvme_rdma_post_recv(queue, &queue->rsp_ring[i]); | |
1224 | if (ret) | |
1225 | goto out_destroy_queue_ib; | |
1226 | } | |
1227 | ||
1228 | return 0; | |
1229 | ||
1230 | out_destroy_queue_ib: | |
1231 | nvme_rdma_destroy_queue_ib(queue); | |
1232 | return ret; | |
1233 | } | |
1234 | ||
1235 | static int nvme_rdma_conn_rejected(struct nvme_rdma_queue *queue, | |
1236 | struct rdma_cm_event *ev) | |
1237 | { | |
7f03953c SW |
1238 | struct rdma_cm_id *cm_id = queue->cm_id; |
1239 | int status = ev->status; | |
1240 | const char *rej_msg; | |
1241 | const struct nvme_rdma_cm_rej *rej_data; | |
1242 | u8 rej_data_len; | |
1243 | ||
1244 | rej_msg = rdma_reject_msg(cm_id, status); | |
1245 | rej_data = rdma_consumer_reject_data(cm_id, ev, &rej_data_len); | |
1246 | ||
1247 | if (rej_data && rej_data_len >= sizeof(u16)) { | |
1248 | u16 sts = le16_to_cpu(rej_data->sts); | |
71102307 CH |
1249 | |
1250 | dev_err(queue->ctrl->ctrl.device, | |
7f03953c SW |
1251 | "Connect rejected: status %d (%s) nvme status %d (%s).\n", |
1252 | status, rej_msg, sts, nvme_rdma_cm_msg(sts)); | |
71102307 CH |
1253 | } else { |
1254 | dev_err(queue->ctrl->ctrl.device, | |
7f03953c | 1255 | "Connect rejected: status %d (%s).\n", status, rej_msg); |
71102307 CH |
1256 | } |
1257 | ||
1258 | return -ECONNRESET; | |
1259 | } | |
1260 | ||
1261 | static int nvme_rdma_addr_resolved(struct nvme_rdma_queue *queue) | |
1262 | { | |
1263 | struct nvme_rdma_device *dev; | |
1264 | int ret; | |
1265 | ||
1266 | dev = nvme_rdma_find_get_device(queue->cm_id); | |
1267 | if (!dev) { | |
1268 | dev_err(queue->cm_id->device->dma_device, | |
1269 | "no client data found!\n"); | |
1270 | return -ECONNREFUSED; | |
1271 | } | |
1272 | ||
1273 | ret = nvme_rdma_create_queue_ib(queue, dev); | |
1274 | if (ret) { | |
1275 | nvme_rdma_dev_put(dev); | |
1276 | goto out; | |
1277 | } | |
1278 | ||
1279 | ret = rdma_resolve_route(queue->cm_id, NVME_RDMA_CONNECT_TIMEOUT_MS); | |
1280 | if (ret) { | |
1281 | dev_err(queue->ctrl->ctrl.device, | |
1282 | "rdma_resolve_route failed (%d).\n", | |
1283 | queue->cm_error); | |
1284 | goto out_destroy_queue; | |
1285 | } | |
1286 | ||
1287 | return 0; | |
1288 | ||
1289 | out_destroy_queue: | |
1290 | nvme_rdma_destroy_queue_ib(queue); | |
1291 | out: | |
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | static int nvme_rdma_route_resolved(struct nvme_rdma_queue *queue) | |
1296 | { | |
1297 | struct nvme_rdma_ctrl *ctrl = queue->ctrl; | |
1298 | struct rdma_conn_param param = { }; | |
0b857b44 | 1299 | struct nvme_rdma_cm_req priv = { }; |
71102307 CH |
1300 | int ret; |
1301 | ||
1302 | param.qp_num = queue->qp->qp_num; | |
1303 | param.flow_control = 1; | |
1304 | ||
1305 | param.responder_resources = queue->device->dev->attrs.max_qp_rd_atom; | |
2ac17c28 SG |
1306 | /* maximum retry count */ |
1307 | param.retry_count = 7; | |
71102307 CH |
1308 | param.rnr_retry_count = 7; |
1309 | param.private_data = &priv; | |
1310 | param.private_data_len = sizeof(priv); | |
1311 | ||
1312 | priv.recfmt = cpu_to_le16(NVME_RDMA_CM_FMT_1_0); | |
1313 | priv.qid = cpu_to_le16(nvme_rdma_queue_idx(queue)); | |
f994d9dc JF |
1314 | /* |
1315 | * set the admin queue depth to the minimum size | |
1316 | * specified by the Fabrics standard. | |
1317 | */ | |
1318 | if (priv.qid == 0) { | |
1319 | priv.hrqsize = cpu_to_le16(NVMF_AQ_DEPTH); | |
1320 | priv.hsqsize = cpu_to_le16(NVMF_AQ_DEPTH - 1); | |
1321 | } else { | |
c5af8654 JF |
1322 | /* |
1323 | * current interpretation of the fabrics spec | |
1324 | * is at minimum you make hrqsize sqsize+1, or a | |
1325 | * 1's based representation of sqsize. | |
1326 | */ | |
f994d9dc | 1327 | priv.hrqsize = cpu_to_le16(queue->queue_size); |
c5af8654 | 1328 | priv.hsqsize = cpu_to_le16(queue->ctrl->ctrl.sqsize); |
f994d9dc | 1329 | } |
71102307 CH |
1330 | |
1331 | ret = rdma_connect(queue->cm_id, ¶m); | |
1332 | if (ret) { | |
1333 | dev_err(ctrl->ctrl.device, | |
1334 | "rdma_connect failed (%d).\n", ret); | |
1335 | goto out_destroy_queue_ib; | |
1336 | } | |
1337 | ||
1338 | return 0; | |
1339 | ||
1340 | out_destroy_queue_ib: | |
1341 | nvme_rdma_destroy_queue_ib(queue); | |
1342 | return ret; | |
1343 | } | |
1344 | ||
71102307 CH |
1345 | static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id, |
1346 | struct rdma_cm_event *ev) | |
1347 | { | |
1348 | struct nvme_rdma_queue *queue = cm_id->context; | |
1349 | int cm_error = 0; | |
1350 | ||
1351 | dev_dbg(queue->ctrl->ctrl.device, "%s (%d): status %d id %p\n", | |
1352 | rdma_event_msg(ev->event), ev->event, | |
1353 | ev->status, cm_id); | |
1354 | ||
1355 | switch (ev->event) { | |
1356 | case RDMA_CM_EVENT_ADDR_RESOLVED: | |
1357 | cm_error = nvme_rdma_addr_resolved(queue); | |
1358 | break; | |
1359 | case RDMA_CM_EVENT_ROUTE_RESOLVED: | |
1360 | cm_error = nvme_rdma_route_resolved(queue); | |
1361 | break; | |
1362 | case RDMA_CM_EVENT_ESTABLISHED: | |
1363 | queue->cm_error = nvme_rdma_conn_established(queue); | |
1364 | /* complete cm_done regardless of success/failure */ | |
1365 | complete(&queue->cm_done); | |
1366 | return 0; | |
1367 | case RDMA_CM_EVENT_REJECTED: | |
1368 | cm_error = nvme_rdma_conn_rejected(queue, ev); | |
1369 | break; | |
1370 | case RDMA_CM_EVENT_ADDR_ERROR: | |
1371 | case RDMA_CM_EVENT_ROUTE_ERROR: | |
1372 | case RDMA_CM_EVENT_CONNECT_ERROR: | |
1373 | case RDMA_CM_EVENT_UNREACHABLE: | |
1374 | dev_dbg(queue->ctrl->ctrl.device, | |
1375 | "CM error event %d\n", ev->event); | |
1376 | cm_error = -ECONNRESET; | |
1377 | break; | |
1378 | case RDMA_CM_EVENT_DISCONNECTED: | |
1379 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
1380 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: | |
1381 | dev_dbg(queue->ctrl->ctrl.device, | |
1382 | "disconnect received - connection closed\n"); | |
1383 | nvme_rdma_error_recovery(queue->ctrl); | |
1384 | break; | |
1385 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
e87a911f SW |
1386 | /* device removal is handled via the ib_client API */ |
1387 | break; | |
71102307 CH |
1388 | default: |
1389 | dev_err(queue->ctrl->ctrl.device, | |
1390 | "Unexpected RDMA CM event (%d)\n", ev->event); | |
1391 | nvme_rdma_error_recovery(queue->ctrl); | |
1392 | break; | |
1393 | } | |
1394 | ||
1395 | if (cm_error) { | |
1396 | queue->cm_error = cm_error; | |
1397 | complete(&queue->cm_done); | |
1398 | } | |
1399 | ||
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | static enum blk_eh_timer_return | |
1404 | nvme_rdma_timeout(struct request *rq, bool reserved) | |
1405 | { | |
1406 | struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); | |
1407 | ||
1408 | /* queue error recovery */ | |
1409 | nvme_rdma_error_recovery(req->queue->ctrl); | |
1410 | ||
1411 | /* fail with DNR on cmd timeout */ | |
1412 | rq->errors = NVME_SC_ABORT_REQ | NVME_SC_DNR; | |
1413 | ||
1414 | return BLK_EH_HANDLED; | |
1415 | } | |
1416 | ||
553cd9ef CH |
1417 | /* |
1418 | * We cannot accept any other command until the Connect command has completed. | |
1419 | */ | |
1420 | static inline bool nvme_rdma_queue_is_ready(struct nvme_rdma_queue *queue, | |
1421 | struct request *rq) | |
1422 | { | |
1423 | if (unlikely(!test_bit(NVME_RDMA_Q_LIVE, &queue->flags))) { | |
1392370e | 1424 | struct nvme_command *cmd = nvme_req(rq)->cmd; |
553cd9ef | 1425 | |
57292b58 | 1426 | if (!blk_rq_is_passthrough(rq) || |
553cd9ef CH |
1427 | cmd->common.opcode != nvme_fabrics_command || |
1428 | cmd->fabrics.fctype != nvme_fabrics_type_connect) | |
1429 | return false; | |
1430 | } | |
1431 | ||
1432 | return true; | |
1433 | } | |
1434 | ||
71102307 CH |
1435 | static int nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx, |
1436 | const struct blk_mq_queue_data *bd) | |
1437 | { | |
1438 | struct nvme_ns *ns = hctx->queue->queuedata; | |
1439 | struct nvme_rdma_queue *queue = hctx->driver_data; | |
1440 | struct request *rq = bd->rq; | |
1441 | struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); | |
1442 | struct nvme_rdma_qe *sqe = &req->sqe; | |
1443 | struct nvme_command *c = sqe->data; | |
1444 | bool flush = false; | |
1445 | struct ib_device *dev; | |
71102307 CH |
1446 | int ret; |
1447 | ||
1448 | WARN_ON_ONCE(rq->tag < 0); | |
1449 | ||
553cd9ef CH |
1450 | if (!nvme_rdma_queue_is_ready(queue, rq)) |
1451 | return BLK_MQ_RQ_QUEUE_BUSY; | |
1452 | ||
71102307 CH |
1453 | dev = queue->device->dev; |
1454 | ib_dma_sync_single_for_cpu(dev, sqe->dma, | |
1455 | sizeof(struct nvme_command), DMA_TO_DEVICE); | |
1456 | ||
1457 | ret = nvme_setup_cmd(ns, rq, c); | |
bac0000a | 1458 | if (ret != BLK_MQ_RQ_QUEUE_OK) |
71102307 CH |
1459 | return ret; |
1460 | ||
71102307 CH |
1461 | blk_mq_start_request(rq); |
1462 | ||
b131c61d | 1463 | ret = nvme_rdma_map_data(queue, rq, c); |
71102307 CH |
1464 | if (ret < 0) { |
1465 | dev_err(queue->ctrl->ctrl.device, | |
1466 | "Failed to map data (%d)\n", ret); | |
1467 | nvme_cleanup_cmd(rq); | |
1468 | goto err; | |
1469 | } | |
1470 | ||
1471 | ib_dma_sync_single_for_device(dev, sqe->dma, | |
1472 | sizeof(struct nvme_command), DMA_TO_DEVICE); | |
1473 | ||
aebf526b | 1474 | if (req_op(rq) == REQ_OP_FLUSH) |
71102307 CH |
1475 | flush = true; |
1476 | ret = nvme_rdma_post_send(queue, sqe, req->sge, req->num_sge, | |
f5b7b559 | 1477 | req->mr->need_inval ? &req->reg_wr.wr : NULL, flush); |
71102307 CH |
1478 | if (ret) { |
1479 | nvme_rdma_unmap_data(queue, rq); | |
1480 | goto err; | |
1481 | } | |
1482 | ||
1483 | return BLK_MQ_RQ_QUEUE_OK; | |
1484 | err: | |
1485 | return (ret == -ENOMEM || ret == -EAGAIN) ? | |
1486 | BLK_MQ_RQ_QUEUE_BUSY : BLK_MQ_RQ_QUEUE_ERROR; | |
1487 | } | |
1488 | ||
1489 | static int nvme_rdma_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) | |
1490 | { | |
1491 | struct nvme_rdma_queue *queue = hctx->driver_data; | |
1492 | struct ib_cq *cq = queue->ib_cq; | |
1493 | struct ib_wc wc; | |
1494 | int found = 0; | |
1495 | ||
1496 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
1497 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
1498 | struct ib_cqe *cqe = wc.wr_cqe; | |
1499 | ||
1500 | if (cqe) { | |
1501 | if (cqe->done == nvme_rdma_recv_done) | |
1502 | found |= __nvme_rdma_recv_done(cq, &wc, tag); | |
1503 | else | |
1504 | cqe->done(cq, &wc); | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | return found; | |
1509 | } | |
1510 | ||
1511 | static void nvme_rdma_complete_rq(struct request *rq) | |
1512 | { | |
1513 | struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); | |
1514 | struct nvme_rdma_queue *queue = req->queue; | |
1515 | int error = 0; | |
1516 | ||
1517 | nvme_rdma_unmap_data(queue, rq); | |
1518 | ||
1519 | if (unlikely(rq->errors)) { | |
1520 | if (nvme_req_needs_retry(rq, rq->errors)) { | |
1521 | nvme_requeue_req(rq); | |
1522 | return; | |
1523 | } | |
1524 | ||
57292b58 | 1525 | if (blk_rq_is_passthrough(rq)) |
71102307 CH |
1526 | error = rq->errors; |
1527 | else | |
1528 | error = nvme_error_status(rq->errors); | |
1529 | } | |
1530 | ||
1531 | blk_mq_end_request(rq, error); | |
1532 | } | |
1533 | ||
1534 | static struct blk_mq_ops nvme_rdma_mq_ops = { | |
1535 | .queue_rq = nvme_rdma_queue_rq, | |
1536 | .complete = nvme_rdma_complete_rq, | |
71102307 CH |
1537 | .init_request = nvme_rdma_init_request, |
1538 | .exit_request = nvme_rdma_exit_request, | |
1539 | .reinit_request = nvme_rdma_reinit_request, | |
1540 | .init_hctx = nvme_rdma_init_hctx, | |
1541 | .poll = nvme_rdma_poll, | |
1542 | .timeout = nvme_rdma_timeout, | |
1543 | }; | |
1544 | ||
1545 | static struct blk_mq_ops nvme_rdma_admin_mq_ops = { | |
1546 | .queue_rq = nvme_rdma_queue_rq, | |
1547 | .complete = nvme_rdma_complete_rq, | |
71102307 CH |
1548 | .init_request = nvme_rdma_init_admin_request, |
1549 | .exit_request = nvme_rdma_exit_admin_request, | |
1550 | .reinit_request = nvme_rdma_reinit_request, | |
1551 | .init_hctx = nvme_rdma_init_admin_hctx, | |
1552 | .timeout = nvme_rdma_timeout, | |
1553 | }; | |
1554 | ||
1555 | static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl) | |
1556 | { | |
1557 | int error; | |
1558 | ||
1559 | error = nvme_rdma_init_queue(ctrl, 0, NVMF_AQ_DEPTH); | |
1560 | if (error) | |
1561 | return error; | |
1562 | ||
1563 | ctrl->device = ctrl->queues[0].device; | |
1564 | ||
1565 | /* | |
1566 | * We need a reference on the device as long as the tag_set is alive, | |
1567 | * as the MRs in the request structures need a valid ib_device. | |
1568 | */ | |
1569 | error = -EINVAL; | |
1570 | if (!nvme_rdma_dev_get(ctrl->device)) | |
1571 | goto out_free_queue; | |
1572 | ||
1573 | ctrl->max_fr_pages = min_t(u32, NVME_RDMA_MAX_SEGMENTS, | |
1574 | ctrl->device->dev->attrs.max_fast_reg_page_list_len); | |
1575 | ||
1576 | memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); | |
1577 | ctrl->admin_tag_set.ops = &nvme_rdma_admin_mq_ops; | |
1578 | ctrl->admin_tag_set.queue_depth = NVME_RDMA_AQ_BLKMQ_DEPTH; | |
1579 | ctrl->admin_tag_set.reserved_tags = 2; /* connect + keep-alive */ | |
1580 | ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; | |
1581 | ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_rdma_request) + | |
1582 | SG_CHUNK_SIZE * sizeof(struct scatterlist); | |
1583 | ctrl->admin_tag_set.driver_data = ctrl; | |
1584 | ctrl->admin_tag_set.nr_hw_queues = 1; | |
1585 | ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; | |
1586 | ||
1587 | error = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); | |
1588 | if (error) | |
1589 | goto out_put_dev; | |
1590 | ||
1591 | ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); | |
1592 | if (IS_ERR(ctrl->ctrl.admin_q)) { | |
1593 | error = PTR_ERR(ctrl->ctrl.admin_q); | |
1594 | goto out_free_tagset; | |
1595 | } | |
1596 | ||
1597 | error = nvmf_connect_admin_queue(&ctrl->ctrl); | |
1598 | if (error) | |
1599 | goto out_cleanup_queue; | |
1600 | ||
553cd9ef CH |
1601 | set_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[0].flags); |
1602 | ||
71102307 CH |
1603 | error = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->cap); |
1604 | if (error) { | |
1605 | dev_err(ctrl->ctrl.device, | |
1606 | "prop_get NVME_REG_CAP failed\n"); | |
1607 | goto out_cleanup_queue; | |
1608 | } | |
1609 | ||
1610 | ctrl->ctrl.sqsize = | |
1611 | min_t(int, NVME_CAP_MQES(ctrl->cap) + 1, ctrl->ctrl.sqsize); | |
1612 | ||
1613 | error = nvme_enable_ctrl(&ctrl->ctrl, ctrl->cap); | |
1614 | if (error) | |
1615 | goto out_cleanup_queue; | |
1616 | ||
1617 | ctrl->ctrl.max_hw_sectors = | |
1618 | (ctrl->max_fr_pages - 1) << (PAGE_SHIFT - 9); | |
1619 | ||
1620 | error = nvme_init_identify(&ctrl->ctrl); | |
1621 | if (error) | |
1622 | goto out_cleanup_queue; | |
1623 | ||
1624 | error = nvme_rdma_alloc_qe(ctrl->queues[0].device->dev, | |
1625 | &ctrl->async_event_sqe, sizeof(struct nvme_command), | |
1626 | DMA_TO_DEVICE); | |
1627 | if (error) | |
1628 | goto out_cleanup_queue; | |
1629 | ||
1630 | nvme_start_keep_alive(&ctrl->ctrl); | |
1631 | ||
1632 | return 0; | |
1633 | ||
1634 | out_cleanup_queue: | |
1635 | blk_cleanup_queue(ctrl->ctrl.admin_q); | |
1636 | out_free_tagset: | |
1637 | /* disconnect and drain the queue before freeing the tagset */ | |
1638 | nvme_rdma_stop_queue(&ctrl->queues[0]); | |
1639 | blk_mq_free_tag_set(&ctrl->admin_tag_set); | |
1640 | out_put_dev: | |
1641 | nvme_rdma_dev_put(ctrl->device); | |
1642 | out_free_queue: | |
1643 | nvme_rdma_free_queue(&ctrl->queues[0]); | |
1644 | return error; | |
1645 | } | |
1646 | ||
1647 | static void nvme_rdma_shutdown_ctrl(struct nvme_rdma_ctrl *ctrl) | |
1648 | { | |
1649 | nvme_stop_keep_alive(&ctrl->ctrl); | |
1650 | cancel_work_sync(&ctrl->err_work); | |
1651 | cancel_delayed_work_sync(&ctrl->reconnect_work); | |
1652 | ||
1653 | if (ctrl->queue_count > 1) { | |
1654 | nvme_stop_queues(&ctrl->ctrl); | |
1655 | blk_mq_tagset_busy_iter(&ctrl->tag_set, | |
1656 | nvme_cancel_request, &ctrl->ctrl); | |
1657 | nvme_rdma_free_io_queues(ctrl); | |
1658 | } | |
1659 | ||
45862ebc | 1660 | if (test_bit(NVME_RDMA_Q_CONNECTED, &ctrl->queues[0].flags)) |
71102307 CH |
1661 | nvme_shutdown_ctrl(&ctrl->ctrl); |
1662 | ||
1663 | blk_mq_stop_hw_queues(ctrl->ctrl.admin_q); | |
1664 | blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, | |
1665 | nvme_cancel_request, &ctrl->ctrl); | |
1666 | nvme_rdma_destroy_admin_queue(ctrl); | |
1667 | } | |
1668 | ||
2461a8dd SG |
1669 | static void __nvme_rdma_remove_ctrl(struct nvme_rdma_ctrl *ctrl, bool shutdown) |
1670 | { | |
1671 | nvme_uninit_ctrl(&ctrl->ctrl); | |
1672 | if (shutdown) | |
1673 | nvme_rdma_shutdown_ctrl(ctrl); | |
a34ca17a SG |
1674 | |
1675 | if (ctrl->ctrl.tagset) { | |
1676 | blk_cleanup_queue(ctrl->ctrl.connect_q); | |
1677 | blk_mq_free_tag_set(&ctrl->tag_set); | |
1678 | nvme_rdma_dev_put(ctrl->device); | |
1679 | } | |
1680 | ||
2461a8dd SG |
1681 | nvme_put_ctrl(&ctrl->ctrl); |
1682 | } | |
1683 | ||
71102307 CH |
1684 | static void nvme_rdma_del_ctrl_work(struct work_struct *work) |
1685 | { | |
1686 | struct nvme_rdma_ctrl *ctrl = container_of(work, | |
1687 | struct nvme_rdma_ctrl, delete_work); | |
1688 | ||
2461a8dd | 1689 | __nvme_rdma_remove_ctrl(ctrl, true); |
71102307 CH |
1690 | } |
1691 | ||
1692 | static int __nvme_rdma_del_ctrl(struct nvme_rdma_ctrl *ctrl) | |
1693 | { | |
1694 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING)) | |
1695 | return -EBUSY; | |
1696 | ||
1697 | if (!queue_work(nvme_rdma_wq, &ctrl->delete_work)) | |
1698 | return -EBUSY; | |
1699 | ||
1700 | return 0; | |
1701 | } | |
1702 | ||
1703 | static int nvme_rdma_del_ctrl(struct nvme_ctrl *nctrl) | |
1704 | { | |
1705 | struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl); | |
cdbecc8d | 1706 | int ret = 0; |
71102307 | 1707 | |
cdbecc8d SW |
1708 | /* |
1709 | * Keep a reference until all work is flushed since | |
1710 | * __nvme_rdma_del_ctrl can free the ctrl mem | |
1711 | */ | |
1712 | if (!kref_get_unless_zero(&ctrl->ctrl.kref)) | |
1713 | return -EBUSY; | |
71102307 | 1714 | ret = __nvme_rdma_del_ctrl(ctrl); |
cdbecc8d SW |
1715 | if (!ret) |
1716 | flush_work(&ctrl->delete_work); | |
1717 | nvme_put_ctrl(&ctrl->ctrl); | |
1718 | return ret; | |
71102307 CH |
1719 | } |
1720 | ||
1721 | static void nvme_rdma_remove_ctrl_work(struct work_struct *work) | |
1722 | { | |
1723 | struct nvme_rdma_ctrl *ctrl = container_of(work, | |
1724 | struct nvme_rdma_ctrl, delete_work); | |
1725 | ||
2461a8dd | 1726 | __nvme_rdma_remove_ctrl(ctrl, false); |
71102307 CH |
1727 | } |
1728 | ||
1729 | static void nvme_rdma_reset_ctrl_work(struct work_struct *work) | |
1730 | { | |
1731 | struct nvme_rdma_ctrl *ctrl = container_of(work, | |
1732 | struct nvme_rdma_ctrl, reset_work); | |
1733 | int ret; | |
1734 | bool changed; | |
1735 | ||
1736 | nvme_rdma_shutdown_ctrl(ctrl); | |
1737 | ||
1738 | ret = nvme_rdma_configure_admin_queue(ctrl); | |
1739 | if (ret) { | |
1740 | /* ctrl is already shutdown, just remove the ctrl */ | |
1741 | INIT_WORK(&ctrl->delete_work, nvme_rdma_remove_ctrl_work); | |
1742 | goto del_dead_ctrl; | |
1743 | } | |
1744 | ||
1745 | if (ctrl->queue_count > 1) { | |
1746 | ret = blk_mq_reinit_tagset(&ctrl->tag_set); | |
1747 | if (ret) | |
1748 | goto del_dead_ctrl; | |
1749 | ||
1750 | ret = nvme_rdma_init_io_queues(ctrl); | |
1751 | if (ret) | |
1752 | goto del_dead_ctrl; | |
1753 | ||
1754 | ret = nvme_rdma_connect_io_queues(ctrl); | |
1755 | if (ret) | |
1756 | goto del_dead_ctrl; | |
1757 | } | |
1758 | ||
1759 | changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); | |
1760 | WARN_ON_ONCE(!changed); | |
1761 | ||
1762 | if (ctrl->queue_count > 1) { | |
1763 | nvme_start_queues(&ctrl->ctrl); | |
1764 | nvme_queue_scan(&ctrl->ctrl); | |
3ef1b4b2 | 1765 | nvme_queue_async_events(&ctrl->ctrl); |
71102307 CH |
1766 | } |
1767 | ||
1768 | return; | |
1769 | ||
1770 | del_dead_ctrl: | |
1771 | /* Deleting this dead controller... */ | |
1772 | dev_warn(ctrl->ctrl.device, "Removing after reset failure\n"); | |
1773 | WARN_ON(!queue_work(nvme_rdma_wq, &ctrl->delete_work)); | |
1774 | } | |
1775 | ||
1776 | static int nvme_rdma_reset_ctrl(struct nvme_ctrl *nctrl) | |
1777 | { | |
1778 | struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl); | |
1779 | ||
1780 | if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING)) | |
1781 | return -EBUSY; | |
1782 | ||
1783 | if (!queue_work(nvme_rdma_wq, &ctrl->reset_work)) | |
1784 | return -EBUSY; | |
1785 | ||
1786 | flush_work(&ctrl->reset_work); | |
1787 | ||
1788 | return 0; | |
1789 | } | |
1790 | ||
1791 | static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = { | |
1792 | .name = "rdma", | |
1793 | .module = THIS_MODULE, | |
1794 | .is_fabrics = true, | |
1795 | .reg_read32 = nvmf_reg_read32, | |
1796 | .reg_read64 = nvmf_reg_read64, | |
1797 | .reg_write32 = nvmf_reg_write32, | |
1798 | .reset_ctrl = nvme_rdma_reset_ctrl, | |
1799 | .free_ctrl = nvme_rdma_free_ctrl, | |
1800 | .submit_async_event = nvme_rdma_submit_async_event, | |
1801 | .delete_ctrl = nvme_rdma_del_ctrl, | |
1802 | .get_subsysnqn = nvmf_get_subsysnqn, | |
1803 | .get_address = nvmf_get_address, | |
1804 | }; | |
1805 | ||
1806 | static int nvme_rdma_create_io_queues(struct nvme_rdma_ctrl *ctrl) | |
1807 | { | |
1808 | struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; | |
1809 | int ret; | |
1810 | ||
1811 | ret = nvme_set_queue_count(&ctrl->ctrl, &opts->nr_io_queues); | |
1812 | if (ret) | |
1813 | return ret; | |
1814 | ||
1815 | ctrl->queue_count = opts->nr_io_queues + 1; | |
1816 | if (ctrl->queue_count < 2) | |
1817 | return 0; | |
1818 | ||
1819 | dev_info(ctrl->ctrl.device, | |
1820 | "creating %d I/O queues.\n", opts->nr_io_queues); | |
1821 | ||
1822 | ret = nvme_rdma_init_io_queues(ctrl); | |
1823 | if (ret) | |
1824 | return ret; | |
1825 | ||
1826 | /* | |
1827 | * We need a reference on the device as long as the tag_set is alive, | |
1828 | * as the MRs in the request structures need a valid ib_device. | |
1829 | */ | |
1830 | ret = -EINVAL; | |
1831 | if (!nvme_rdma_dev_get(ctrl->device)) | |
1832 | goto out_free_io_queues; | |
1833 | ||
1834 | memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); | |
1835 | ctrl->tag_set.ops = &nvme_rdma_mq_ops; | |
c5af8654 | 1836 | ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; |
71102307 CH |
1837 | ctrl->tag_set.reserved_tags = 1; /* fabric connect */ |
1838 | ctrl->tag_set.numa_node = NUMA_NO_NODE; | |
1839 | ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; | |
1840 | ctrl->tag_set.cmd_size = sizeof(struct nvme_rdma_request) + | |
1841 | SG_CHUNK_SIZE * sizeof(struct scatterlist); | |
1842 | ctrl->tag_set.driver_data = ctrl; | |
1843 | ctrl->tag_set.nr_hw_queues = ctrl->queue_count - 1; | |
1844 | ctrl->tag_set.timeout = NVME_IO_TIMEOUT; | |
1845 | ||
1846 | ret = blk_mq_alloc_tag_set(&ctrl->tag_set); | |
1847 | if (ret) | |
1848 | goto out_put_dev; | |
1849 | ctrl->ctrl.tagset = &ctrl->tag_set; | |
1850 | ||
1851 | ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); | |
1852 | if (IS_ERR(ctrl->ctrl.connect_q)) { | |
1853 | ret = PTR_ERR(ctrl->ctrl.connect_q); | |
1854 | goto out_free_tag_set; | |
1855 | } | |
1856 | ||
1857 | ret = nvme_rdma_connect_io_queues(ctrl); | |
1858 | if (ret) | |
1859 | goto out_cleanup_connect_q; | |
1860 | ||
1861 | return 0; | |
1862 | ||
1863 | out_cleanup_connect_q: | |
1864 | blk_cleanup_queue(ctrl->ctrl.connect_q); | |
1865 | out_free_tag_set: | |
1866 | blk_mq_free_tag_set(&ctrl->tag_set); | |
1867 | out_put_dev: | |
1868 | nvme_rdma_dev_put(ctrl->device); | |
1869 | out_free_io_queues: | |
1870 | nvme_rdma_free_io_queues(ctrl); | |
1871 | return ret; | |
1872 | } | |
1873 | ||
1874 | static int nvme_rdma_parse_ipaddr(struct sockaddr_in *in_addr, char *p) | |
1875 | { | |
1876 | u8 *addr = (u8 *)&in_addr->sin_addr.s_addr; | |
1877 | size_t buflen = strlen(p); | |
1878 | ||
1879 | /* XXX: handle IPv6 addresses */ | |
1880 | ||
1881 | if (buflen > INET_ADDRSTRLEN) | |
1882 | return -EINVAL; | |
1883 | if (in4_pton(p, buflen, addr, '\0', NULL) == 0) | |
1884 | return -EINVAL; | |
1885 | in_addr->sin_family = AF_INET; | |
1886 | return 0; | |
1887 | } | |
1888 | ||
1889 | static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev, | |
1890 | struct nvmf_ctrl_options *opts) | |
1891 | { | |
1892 | struct nvme_rdma_ctrl *ctrl; | |
1893 | int ret; | |
1894 | bool changed; | |
1895 | ||
1896 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); | |
1897 | if (!ctrl) | |
1898 | return ERR_PTR(-ENOMEM); | |
1899 | ctrl->ctrl.opts = opts; | |
1900 | INIT_LIST_HEAD(&ctrl->list); | |
1901 | ||
1902 | ret = nvme_rdma_parse_ipaddr(&ctrl->addr_in, opts->traddr); | |
1903 | if (ret) { | |
1904 | pr_err("malformed IP address passed: %s\n", opts->traddr); | |
1905 | goto out_free_ctrl; | |
1906 | } | |
1907 | ||
1908 | if (opts->mask & NVMF_OPT_TRSVCID) { | |
1909 | u16 port; | |
1910 | ||
1911 | ret = kstrtou16(opts->trsvcid, 0, &port); | |
1912 | if (ret) | |
1913 | goto out_free_ctrl; | |
1914 | ||
1915 | ctrl->addr_in.sin_port = cpu_to_be16(port); | |
1916 | } else { | |
1917 | ctrl->addr_in.sin_port = cpu_to_be16(NVME_RDMA_IP_PORT); | |
1918 | } | |
1919 | ||
1920 | ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_rdma_ctrl_ops, | |
1921 | 0 /* no quirks, we're perfect! */); | |
1922 | if (ret) | |
1923 | goto out_free_ctrl; | |
1924 | ||
1925 | ctrl->reconnect_delay = opts->reconnect_delay; | |
1926 | INIT_DELAYED_WORK(&ctrl->reconnect_work, | |
1927 | nvme_rdma_reconnect_ctrl_work); | |
1928 | INIT_WORK(&ctrl->err_work, nvme_rdma_error_recovery_work); | |
1929 | INIT_WORK(&ctrl->delete_work, nvme_rdma_del_ctrl_work); | |
1930 | INIT_WORK(&ctrl->reset_work, nvme_rdma_reset_ctrl_work); | |
1931 | spin_lock_init(&ctrl->lock); | |
1932 | ||
1933 | ctrl->queue_count = opts->nr_io_queues + 1; /* +1 for admin queue */ | |
c5af8654 | 1934 | ctrl->ctrl.sqsize = opts->queue_size - 1; |
71102307 CH |
1935 | ctrl->ctrl.kato = opts->kato; |
1936 | ||
1937 | ret = -ENOMEM; | |
1938 | ctrl->queues = kcalloc(ctrl->queue_count, sizeof(*ctrl->queues), | |
1939 | GFP_KERNEL); | |
1940 | if (!ctrl->queues) | |
1941 | goto out_uninit_ctrl; | |
1942 | ||
1943 | ret = nvme_rdma_configure_admin_queue(ctrl); | |
1944 | if (ret) | |
1945 | goto out_kfree_queues; | |
1946 | ||
1947 | /* sanity check icdoff */ | |
1948 | if (ctrl->ctrl.icdoff) { | |
1949 | dev_err(ctrl->ctrl.device, "icdoff is not supported!\n"); | |
1950 | goto out_remove_admin_queue; | |
1951 | } | |
1952 | ||
1953 | /* sanity check keyed sgls */ | |
1954 | if (!(ctrl->ctrl.sgls & (1 << 20))) { | |
1955 | dev_err(ctrl->ctrl.device, "Mandatory keyed sgls are not support\n"); | |
1956 | goto out_remove_admin_queue; | |
1957 | } | |
1958 | ||
1959 | if (opts->queue_size > ctrl->ctrl.maxcmd) { | |
1960 | /* warn if maxcmd is lower than queue_size */ | |
1961 | dev_warn(ctrl->ctrl.device, | |
1962 | "queue_size %zu > ctrl maxcmd %u, clamping down\n", | |
1963 | opts->queue_size, ctrl->ctrl.maxcmd); | |
1964 | opts->queue_size = ctrl->ctrl.maxcmd; | |
1965 | } | |
1966 | ||
76c08bf4 SJ |
1967 | if (opts->queue_size > ctrl->ctrl.sqsize + 1) { |
1968 | /* warn if sqsize is lower than queue_size */ | |
1969 | dev_warn(ctrl->ctrl.device, | |
1970 | "queue_size %zu > ctrl sqsize %u, clamping down\n", | |
1971 | opts->queue_size, ctrl->ctrl.sqsize + 1); | |
1972 | opts->queue_size = ctrl->ctrl.sqsize + 1; | |
1973 | } | |
1974 | ||
71102307 CH |
1975 | if (opts->nr_io_queues) { |
1976 | ret = nvme_rdma_create_io_queues(ctrl); | |
1977 | if (ret) | |
1978 | goto out_remove_admin_queue; | |
1979 | } | |
1980 | ||
1981 | changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); | |
1982 | WARN_ON_ONCE(!changed); | |
1983 | ||
1984 | dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISp\n", | |
1985 | ctrl->ctrl.opts->subsysnqn, &ctrl->addr); | |
1986 | ||
1987 | kref_get(&ctrl->ctrl.kref); | |
1988 | ||
1989 | mutex_lock(&nvme_rdma_ctrl_mutex); | |
1990 | list_add_tail(&ctrl->list, &nvme_rdma_ctrl_list); | |
1991 | mutex_unlock(&nvme_rdma_ctrl_mutex); | |
1992 | ||
1993 | if (opts->nr_io_queues) { | |
1994 | nvme_queue_scan(&ctrl->ctrl); | |
1995 | nvme_queue_async_events(&ctrl->ctrl); | |
1996 | } | |
1997 | ||
1998 | return &ctrl->ctrl; | |
1999 | ||
2000 | out_remove_admin_queue: | |
2001 | nvme_stop_keep_alive(&ctrl->ctrl); | |
2002 | nvme_rdma_destroy_admin_queue(ctrl); | |
2003 | out_kfree_queues: | |
2004 | kfree(ctrl->queues); | |
2005 | out_uninit_ctrl: | |
2006 | nvme_uninit_ctrl(&ctrl->ctrl); | |
2007 | nvme_put_ctrl(&ctrl->ctrl); | |
2008 | if (ret > 0) | |
2009 | ret = -EIO; | |
2010 | return ERR_PTR(ret); | |
2011 | out_free_ctrl: | |
2012 | kfree(ctrl); | |
2013 | return ERR_PTR(ret); | |
2014 | } | |
2015 | ||
2016 | static struct nvmf_transport_ops nvme_rdma_transport = { | |
2017 | .name = "rdma", | |
2018 | .required_opts = NVMF_OPT_TRADDR, | |
2ac17c28 | 2019 | .allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY, |
71102307 CH |
2020 | .create_ctrl = nvme_rdma_create_ctrl, |
2021 | }; | |
2022 | ||
e87a911f SW |
2023 | static void nvme_rdma_add_one(struct ib_device *ib_device) |
2024 | { | |
2025 | } | |
2026 | ||
2027 | static void nvme_rdma_remove_one(struct ib_device *ib_device, void *client_data) | |
2028 | { | |
2029 | struct nvme_rdma_ctrl *ctrl; | |
2030 | ||
2031 | /* Delete all controllers using this device */ | |
2032 | mutex_lock(&nvme_rdma_ctrl_mutex); | |
2033 | list_for_each_entry(ctrl, &nvme_rdma_ctrl_list, list) { | |
2034 | if (ctrl->device->dev != ib_device) | |
2035 | continue; | |
2036 | dev_info(ctrl->ctrl.device, | |
2037 | "Removing ctrl: NQN \"%s\", addr %pISp\n", | |
2038 | ctrl->ctrl.opts->subsysnqn, &ctrl->addr); | |
2039 | __nvme_rdma_del_ctrl(ctrl); | |
2040 | } | |
2041 | mutex_unlock(&nvme_rdma_ctrl_mutex); | |
2042 | ||
2043 | flush_workqueue(nvme_rdma_wq); | |
2044 | } | |
2045 | ||
2046 | static struct ib_client nvme_rdma_ib_client = { | |
2047 | .name = "nvme_rdma", | |
2048 | .add = nvme_rdma_add_one, | |
2049 | .remove = nvme_rdma_remove_one | |
2050 | }; | |
2051 | ||
71102307 CH |
2052 | static int __init nvme_rdma_init_module(void) |
2053 | { | |
e87a911f SW |
2054 | int ret; |
2055 | ||
71102307 CH |
2056 | nvme_rdma_wq = create_workqueue("nvme_rdma_wq"); |
2057 | if (!nvme_rdma_wq) | |
2058 | return -ENOMEM; | |
2059 | ||
e87a911f SW |
2060 | ret = ib_register_client(&nvme_rdma_ib_client); |
2061 | if (ret) { | |
2062 | destroy_workqueue(nvme_rdma_wq); | |
2063 | return ret; | |
2064 | } | |
2065 | ||
71102307 CH |
2066 | nvmf_register_transport(&nvme_rdma_transport); |
2067 | return 0; | |
2068 | } | |
2069 | ||
2070 | static void __exit nvme_rdma_cleanup_module(void) | |
2071 | { | |
71102307 | 2072 | nvmf_unregister_transport(&nvme_rdma_transport); |
e87a911f | 2073 | ib_unregister_client(&nvme_rdma_ib_client); |
71102307 CH |
2074 | destroy_workqueue(nvme_rdma_wq); |
2075 | } | |
2076 | ||
2077 | module_init(nvme_rdma_init_module); | |
2078 | module_exit(nvme_rdma_cleanup_module); | |
2079 | ||
2080 | MODULE_LICENSE("GPL v2"); |